diff --git a/core/authorize.php b/core/authorize.php
index 073770a07cdd4d097aafc3a5998192c9fa335e45..a72e0ac68721a5424a7df72a159812d741d0b262 100644
--- a/core/authorize.php
+++ b/core/authorize.php
@@ -116,10 +116,10 @@ function authorize_access_allowed(Request $request) {
       drupal_set_message($results['page_message']['message'], $results['page_message']['type']);
     }
 
-    $content['authorize_report'] = array(
+    $content['authorize_report'] = [
       '#theme' => 'authorize_report',
       '#messages' => $results['messages'],
-    );
+    ];
 
     if (is_array($results['tasks'])) {
       $links = $results['tasks'];
@@ -148,11 +148,11 @@ function authorize_access_allowed(Request $request) {
       ];
     }
 
-    $content['next_steps'] = array(
+    $content['next_steps'] = [
       '#theme' => 'item_list',
       '#items' => $links,
       '#title' => t('Next steps'),
-    );
+    ];
   }
   // If a batch is running, let it run.
   elseif ($request->query->has('batch')) {
@@ -189,9 +189,9 @@ function authorize_access_allowed(Request $request) {
 }
 
 $bare_html_page_renderer = \Drupal::service('bare_html_page_renderer');
-$response = $bare_html_page_renderer->renderBarePage($content, $page_title, 'maintenance_page', array(
+$response = $bare_html_page_renderer->renderBarePage($content, $page_title, 'maintenance_page', [
   '#show_messages' => $show_messages,
-));
+]);
 if (!$is_allowed) {
   $response->setStatusCode(403);
 }
diff --git a/core/core.api.php b/core/core.api.php
index 68f46360bacfda3dd3c95e163317e64148f35b86..22447dfab57d8c8815462e69ea5e556383c8a33c 100644
--- a/core/core.api.php
+++ b/core/core.api.php
@@ -2103,39 +2103,39 @@ function hook_mail_alter(&$message) {
 function hook_mail($key, &$message, $params) {
   $account = $params['account'];
   $context = $params['context'];
-  $variables = array(
+  $variables = [
     '%site_name' => \Drupal::config('system.site')->get('name'),
     '%username' => $account->getDisplayName(),
-  );
+  ];
   if ($context['hook'] == 'taxonomy') {
     $entity = $params['entity'];
     $vocabulary = Vocabulary::load($entity->id());
-    $variables += array(
+    $variables += [
       '%term_name' => $entity->name,
       '%term_description' => $entity->description,
       '%term_id' => $entity->id(),
       '%vocabulary_name' => $vocabulary->label(),
       '%vocabulary_description' => $vocabulary->getDescription(),
       '%vocabulary_id' => $vocabulary->id(),
-    );
+    ];
   }
 
   // Node-based variable translation is only available if we have a node.
   if (isset($params['node'])) {
     /** @var \Drupal\node\NodeInterface $node */
     $node = $params['node'];
-    $variables += array(
+    $variables += [
       '%uid' => $node->getOwnerId(),
-      '%url' => $node->url('canonical', array('absolute' => TRUE)),
+      '%url' => $node->url('canonical', ['absolute' => TRUE]),
       '%node_type' => node_get_type_label($node),
       '%title' => $node->getTitle(),
       '%teaser' => $node->teaser,
       '%body' => $node->body,
-    );
+    ];
   }
   $subject = strtr($context['subject'], $variables);
   $body = strtr($context['message'], $variables);
-  $message['subject'] .= str_replace(array("\r", "\n"), '', $subject);
+  $message['subject'] .= str_replace(["\r", "\n"], '', $subject);
   $message['body'][] = MailFormatHelper::htmlToText($body);
 }
 
diff --git a/core/includes/batch.inc b/core/includes/batch.inc
index 84291ae29f5953203c73328b8a92526d1a7b2531..5d05cd503929ef24fbd89f09640bf9470eaa33a1 100644
--- a/core/includes/batch.inc
+++ b/core/includes/batch.inc
@@ -50,7 +50,7 @@ function _batch_page(Request $request) {
   // Register database update for the end of processing.
   drupal_register_shutdown_function('_batch_shutdown');
 
-  $build = array();
+  $build = [];
 
   // Add batch-specific libraries.
   foreach ($batch['sets'] as $batch_set) {
@@ -94,7 +94,7 @@ function _batch_do() {
   // Perform actual processing.
   list($percentage, $message, $label) = _batch_process();
 
-  return new JsonResponse(array('status' => TRUE, 'percentage' => $percentage, 'message' => $message, 'label' => $label));
+  return new JsonResponse(['status' => TRUE, 'percentage' => $percentage, 'message' => $message, 'label' => $label]);
 }
 
 /**
@@ -130,9 +130,9 @@ function _batch_progress_page() {
     // it. While this causes invalid HTML, the same would be true if we didn't,
     // as content is not allowed to appear after </html> anyway.
     $bare_html_page_renderer = \Drupal::service('bare_html_page_renderer');
-    $response = $bare_html_page_renderer->renderBarePage(['#markup' => $fallback], $current_set['title'], 'maintenance_page', array(
+    $response = $bare_html_page_renderer->renderBarePage(['#markup' => $fallback], $current_set['title'], 'maintenance_page', [
       '#show_messages' => FALSE,
-    ));
+    ]);
 
     // Just use the content of the response.
     $fallback = $response->getContent();
@@ -159,26 +159,26 @@ function _batch_progress_page() {
 
   $url = $batch['url']->toString(TRUE)->getGeneratedUrl();
 
-  $build = array(
+  $build = [
     '#theme' => 'progress_bar',
     '#percent' => $percentage,
-    '#message' => array('#markup' => $message),
+    '#message' => ['#markup' => $message],
     '#label' => $label,
-    '#attached' => array(
-      'html_head' => array(
-        array(
-          array(
+    '#attached' => [
+      'html_head' => [
+        [
+          [
             // Redirect through a 'Refresh' meta tag if JavaScript is disabled.
             '#tag' => 'meta',
             '#noscript' => TRUE,
-            '#attributes' => array(
+            '#attributes' => [
               'http-equiv' => 'Refresh',
               'content' => '0; URL=' . $url,
-            ),
-          ),
+            ],
+          ],
           'batch_progress_meta_refresh',
-        ),
-      ),
+        ],
+      ],
       // Adds JavaScript code and settings for clients where JavaScript is enabled.
       'drupalSettings' => [
         'batch' => [
@@ -187,11 +187,11 @@ function _batch_progress_page() {
           'uri' => $url,
         ],
       ],
-      'library' => array(
+      'library' => [
         'core/drupal.batch',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
   return $build;
 }
 
@@ -243,13 +243,13 @@ function _batch_process() {
       list($callback, $args) = $item->data;
 
       // Build the 'context' array and execute the function call.
-      $batch_context = array(
+      $batch_context = [
         'sandbox'  => &$current_set['sandbox'],
         'results'  => &$current_set['results'],
         'finished' => &$finished,
         'message'  => &$task_message,
-      );
-      call_user_func_array($callback, array_merge($args, array(&$batch_context)));
+      ];
+      call_user_func_array($callback, array_merge($args, [&$batch_context]));
 
       if ($finished >= 1) {
         // Make sure this step is not counted twice when computing $current.
@@ -257,7 +257,7 @@ function _batch_process() {
         // Remove the processed operation and clear the sandbox.
         $queue->deleteItem($item);
         $current_set['count']--;
-        $current_set['sandbox'] = array();
+        $current_set['sandbox'] = [];
       }
     }
 
@@ -312,7 +312,7 @@ function _batch_process() {
     $current    = $total - $remaining + $finished;
     $percentage = _batch_api_percentage($total, $current);
     $elapsed    = isset($current_set['elapsed']) ? $current_set['elapsed'] : 0;
-    $values     = array(
+    $values     = [
       '@remaining'  => $remaining,
       '@total'      => $total,
       '@current'    => floor($current),
@@ -320,13 +320,13 @@ function _batch_process() {
       '@elapsed'    => \Drupal::service('date.formatter')->formatInterval($elapsed / 1000),
       // If possible, estimate remaining processing time.
       '@estimate'   => ($current > 0) ? \Drupal::service('date.formatter')->formatInterval(($elapsed * ($total - $current) / $current) / 1000) : '-',
-    );
+    ];
     $message = strtr($progress_message, $values);
     if (!empty($task_message)) {
       $label = $task_message;
     }
 
-    return array($percentage, $message, $label);
+    return [$percentage, $message, $label];
   }
   else {
     // If we are not in progressive mode, the entire batch has been processed.
@@ -385,7 +385,7 @@ function _batch_next_set() {
       // We use our stored copies of $form and $form_state to account for
       // possible alterations by previous form submit handlers.
       $complete_form = &$batch['form_state']->getCompleteForm();
-      call_user_func_array($callback, array(&$complete_form, &$batch['form_state']));
+      call_user_func_array($callback, [&$complete_form, &$batch['form_state']]);
     }
     return TRUE;
   }
@@ -411,7 +411,7 @@ function _batch_finished() {
       if (is_callable($batch_set['finished'])) {
         $queue = _batch_queue($batch_set);
         $operations = $queue->getAllItems();
-        $batch_set_result = call_user_func_array($batch_set['finished'], array($batch_set['success'], $batch_set['results'], $operations, \Drupal::service('date.formatter')->formatInterval($batch_set['elapsed'] / 1000)));
+        $batch_set_result = call_user_func_array($batch_set['finished'], [$batch_set['success'], $batch_set['results'], $operations, \Drupal::service('date.formatter')->formatInterval($batch_set['elapsed'] / 1000)]);
         // If a batch 'finished' callback requested a redirect after the batch
         // is complete, save that for later use. If more than one batch set
         // returned a redirect, the last one is used.
diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 9c976eb0033751fa1ba8b0699dbc603af6b7b14a..293f25ae9d24eafce7fb568e6f5d38eea1fae9be 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -197,7 +197,7 @@ function config_get_config_directory($type) {
 function drupal_get_filename($type, $name, $filename = NULL) {
   // The location of files will not change during the request, so do not use
   // drupal_static().
-  static $files = array();
+  static $files = [];
 
   // Type 'core' only exists to simplify application-level logic; it always maps
   // to the /core directory, whereas $name is ignored. It is only requested via
@@ -213,7 +213,7 @@ function drupal_get_filename($type, $name, $filename = NULL) {
     $type = 'module';
   }
   if (!isset($files[$type])) {
-    $files[$type] = array();
+    $files[$type] = [];
   }
 
   if (isset($filename)) {
@@ -233,11 +233,11 @@ function drupal_get_filename($type, $name, $filename = NULL) {
     // system_rebuild_module_data() and
     // \Drupal\Core\Extension\ThemeHandlerInterface::rebuildThemeData().
     if (!isset($files[$type][$name]) && \Drupal::hasService('state')) {
-      $files[$type] += \Drupal::state()->get('system.' . $type . '.files', array());
+      $files[$type] += \Drupal::state()->get('system.' . $type . '.files', []);
     }
     // If still unknown, create a user-level error message.
     if (!isset($files[$type][$name])) {
-      trigger_error(SafeMarkup::format('The following @type is missing from the file system: @name', array('@type' => $type, '@name' => $name)), E_USER_WARNING);
+      trigger_error(SafeMarkup::format('The following @type is missing from the file system: @name', ['@type' => $type, '@name' => $name]), E_USER_WARNING);
     }
   }
 
@@ -301,7 +301,7 @@ function drupal_get_path($type, $name) {
  *
  * @ingroup sanitization
  */
-function t($string, array $args = array(), array $options = array()) {
+function t($string, array $args = [], array $options = []) {
   return new TranslatableMarkup($string, $args, $options);
 }
 
@@ -376,7 +376,7 @@ function drupal_validate_utf8($text) {
  *
  * @see \Drupal\Core\Utility\Error::decodeException()
  */
-function watchdog_exception($type, Exception $exception, $message = NULL, $variables = array(), $severity = RfcLogLevel::ERROR, $link = NULL) {
+function watchdog_exception($type, Exception $exception, $message = NULL, $variables = [], $severity = RfcLogLevel::ERROR, $link = NULL) {
 
   // Use a default value if $message is not set.
   if (empty($message)) {
@@ -447,7 +447,7 @@ function watchdog_exception($type, Exception $exception, $message = NULL, $varia
 function drupal_set_message($message = NULL, $type = 'status', $repeat = FALSE) {
   if (isset($message)) {
     if (!isset($_SESSION['messages'][$type])) {
-      $_SESSION['messages'][$type] = array();
+      $_SESSION['messages'][$type] = [];
     }
 
     // Convert strings which are safe to the simplest Markup objects.
@@ -501,7 +501,7 @@ function drupal_get_messages($type = NULL, $clear_queue = TRUE) {
         unset($_SESSION['messages'][$type]);
       }
       if (isset($messages[$type])) {
-        return array($type => $messages[$type]);
+        return [$type => $messages[$type]];
       }
     }
     else {
@@ -511,7 +511,7 @@ function drupal_get_messages($type = NULL, $clear_queue = TRUE) {
       return $messages;
     }
   }
-  return array();
+  return [];
 }
 
 /**
@@ -899,7 +899,7 @@ function drupal_classloader_register($name, $path) {
  * @see drupal_static_reset()
  */
 function &drupal_static($name, $default_value = NULL, $reset = FALSE) {
-  static $data = array(), $default = array();
+  static $data = [], $default = [];
   // First check if dealing with a previously defined static variable.
   if (isset($data[$name]) || array_key_exists($name, $data)) {
     // Non-NULL $name and both $data[$name] and $default[$name] statics exist.
@@ -978,7 +978,7 @@ function drupal_placeholder($text) {
 function &drupal_register_shutdown_function($callback = NULL) {
   // We cannot use drupal_static() here because the static cache is reset during
   // batch processing, which breaks batch handling.
-  static $callbacks = array();
+  static $callbacks = [];
 
   if (isset($callback)) {
     // Only register the internal shutdown function once.
@@ -989,7 +989,7 @@ function &drupal_register_shutdown_function($callback = NULL) {
     // Remove $callback from the arguments.
     unset($args[0]);
     // Save callback and arguments
-    $callbacks[] = array('callback' => $callback, 'arguments' => $args);
+    $callbacks[] = ['callback' => $callback, 'arguments' => $args];
   }
   return $callbacks;
 }
diff --git a/core/includes/common.inc b/core/includes/common.inc
index 037c5b0f44878a23b8dec2bc22066e0dc3b599ac..323a666b89e81a2c92319dafb75b92411c47cee4 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -249,7 +249,7 @@ function check_url($uri) {
  */
 function format_size($size, $langcode = NULL) {
   if ($size < Bytes::KILOBYTE) {
-    return \Drupal::translation()->formatPlural($size, '1 byte', '@count bytes', array(), array('langcode' => $langcode));
+    return \Drupal::translation()->formatPlural($size, '1 byte', '@count bytes', [], ['langcode' => $langcode]);
   }
   else {
     $size = $size / Bytes::KILOBYTE; // Convert bytes to kilobytes.
@@ -352,7 +352,7 @@ function date_iso8601($date) {
  *   A ; separated string ready for insertion in a HTTP header. No escaping is
  *   performed for HTML entities, so this string is not safe to be printed.
  */
-function drupal_http_header_attributes(array $attributes = array()) {
+function drupal_http_header_attributes(array $attributes = []) {
   foreach ($attributes as $attribute => &$data) {
     if (is_array($data)) {
       $data = implode(' ', $data);
@@ -433,18 +433,18 @@ function drupal_clear_css_cache() {
  * @see hook_js_alter()
  */
 function drupal_js_defaults($data = NULL) {
-  return array(
+  return [
     'type' => 'file',
     'group' => JS_DEFAULT,
     'weight' => 0,
     'scope' => 'header',
     'cache' => TRUE,
     'preprocess' => TRUE,
-    'attributes' => array(),
+    'attributes' => [],
     'version' => NULL,
     'data' => $data,
-    'browsers' => array(),
-  );
+    'browsers' => [],
+  ];
 }
 
 /**
@@ -704,12 +704,12 @@ function drupal_process_states(&$elements) {
  */
 function drupal_attach_tabledrag(&$element, array $options) {
   // Add default values to elements.
-  $options = $options + array(
+  $options = $options + [
     'subgroup' => NULL,
     'source' => NULL,
     'hidden' => TRUE,
     'limit' => 0
-  );
+  ];
 
   $group = $options['group'];
 
@@ -719,14 +719,14 @@ function drupal_attach_tabledrag(&$element, array $options) {
   // If a subgroup or source isn't set, assume it is the same as the group.
   $target = isset($options['subgroup']) ? $options['subgroup'] : $group;
   $source = isset($options['source']) ? $options['source'] : $target;
-  $element['#attached']['drupalSettings']['tableDrag'][$options['table_id']][$group][$tabledrag_id] = array(
+  $element['#attached']['drupalSettings']['tableDrag'][$options['table_id']][$group][$tabledrag_id] = [
     'target' => $target,
     'source' => $source,
     'relationship' => $options['relationship'],
     'action' => $options['action'],
     'hidden' => $options['hidden'],
     'limit' => $options['limit'],
-  );
+  ];
 
   $element['#attached']['library'][] = 'core/drupal.tabledrag';
 }
@@ -827,7 +827,7 @@ function drupal_pre_render_link($element) {
  * properties of the parent are used.
  */
 function drupal_pre_render_links($element) {
-  $element += array('#links' => array(), '#attached' => array());
+  $element += ['#links' => [], '#attached' => []];
   foreach (Element::children($element) as $key) {
     $child = &$element[$key];
     // If the child has links which have not been printed yet and the user has
@@ -1115,7 +1115,7 @@ function drupal_flush_all_caches() {
   // Rebuild and reboot a new kernel. A simple DrupalKernel reboot is not
   // sufficient, since the list of enabled modules might have been adjusted
   // above due to changed code.
-  $files = array();
+  $files = [];
   foreach ($module_data as $name => $extension) {
     if ($extension->status) {
       $files[$name] = $extension;
@@ -1217,7 +1217,7 @@ function drupal_check_incompatibility($v, $current_version) {
  *   validation system.
  */
 function archiver_get_extensions() {
-  $valid_extensions = array();
+  $valid_extensions = [];
   foreach (\Drupal::service('plugin.manager.archiver')->getDefinitions() as $archive) {
     foreach ($archive['extensions'] as $extension) {
       foreach (explode('.', $extension) as $part) {
@@ -1246,9 +1246,9 @@ function archiver_get_archiver($file) {
   // Archivers can only work on local paths
   $filepath = drupal_realpath($file);
   if (!is_file($filepath)) {
-    throw new Exception(t('Archivers can only operate on local files: %file not supported', array('%file' => $file)));
+    throw new Exception(t('Archivers can only operate on local files: %file not supported', ['%file' => $file]));
   }
-  return \Drupal::service('plugin.manager.archiver')->getInstance(array('filepath' => $filepath));
+  return \Drupal::service('plugin.manager.archiver')->getInstance(['filepath' => $filepath]);
 }
 
 /**
@@ -1270,7 +1270,7 @@ function drupal_get_updaters() {
   if (!isset($updaters)) {
     $updaters = \Drupal::moduleHandler()->invokeAll('updater_info');
     \Drupal::moduleHandler()->alter('updater_info', $updaters);
-    uasort($updaters, array(SortArray::class, 'sortByWeightElement'));
+    uasort($updaters, [SortArray::class, 'sortByWeightElement']);
   }
   return $updaters;
 }
@@ -1290,7 +1290,7 @@ function drupal_get_filetransfer_info() {
   if (!isset($info)) {
     $info = \Drupal::moduleHandler()->invokeAll('filetransfer_info');
     \Drupal::moduleHandler()->alter('filetransfer_info', $info);
-    uasort($info, array(SortArray::class, 'sortByWeightElement'));
+    uasort($info, [SortArray::class, 'sortByWeightElement']);
   }
   return $info;
 }
diff --git a/core/includes/database.inc b/core/includes/database.inc
index ff03885a25c4afdd0571b07228da0a0bf14f8089..d4cb593af6f93e0c4c63e0451c742657bca8531f 100644
--- a/core/includes/database.inc
+++ b/core/includes/database.inc
@@ -53,7 +53,7 @@
  * @see \Drupal\Core\Database\Connection::query()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_query($query, array $args = array(), array $options = array()) {
+function db_query($query, array $args = [], array $options = []) {
   if (empty($options['target'])) {
     $options['target'] = 'default';
   }
@@ -91,7 +91,7 @@ function db_query($query, array $args = array(), array $options = array()) {
  * @see \Drupal\Core\Database\Connection::queryRange()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_query_range($query, $from, $count, array $args = array(), array $options = array()) {
+function db_query_range($query, $from, $count, array $args = [], array $options = []) {
   if (empty($options['target'])) {
     $options['target'] = 'default';
   }
@@ -127,7 +127,7 @@ function db_query_range($query, $from, $count, array $args = array(), array $opt
  * @see \Drupal\Core\Database\Connection::queryTemporary()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_query_temporary($query, array $args = array(), array $options = array()) {
+function db_query_temporary($query, array $args = [], array $options = []) {
   if (empty($options['target'])) {
     $options['target'] = 'default';
   }
@@ -154,7 +154,7 @@ function db_query_temporary($query, array $args = array(), array $options = arra
  * @see \Drupal\Core\Database\Connection::insert()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_insert($table, array $options = array()) {
+function db_insert($table, array $options = []) {
   if (empty($options['target']) || $options['target'] == 'replica') {
     $options['target'] = 'default';
   }
@@ -180,7 +180,7 @@ function db_insert($table, array $options = array()) {
  * @see \Drupal\Core\Database\Connection::merge()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_merge($table, array $options = array()) {
+function db_merge($table, array $options = []) {
   if (empty($options['target']) || $options['target'] == 'replica') {
     $options['target'] = 'default';
   }
@@ -206,7 +206,7 @@ function db_merge($table, array $options = array()) {
  * @see \Drupal\Core\Database\Connection::update()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_update($table, array $options = array()) {
+function db_update($table, array $options = []) {
   if (empty($options['target']) || $options['target'] == 'replica') {
     $options['target'] = 'default';
   }
@@ -232,7 +232,7 @@ function db_update($table, array $options = array()) {
  * @see \Drupal\Core\Database\Connection::delete()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_delete($table, array $options = array()) {
+function db_delete($table, array $options = []) {
   if (empty($options['target']) || $options['target'] == 'replica') {
     $options['target'] = 'default';
   }
@@ -258,7 +258,7 @@ function db_delete($table, array $options = array()) {
  * @see \Drupal\Core\Database\Connection::truncate()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_truncate($table, array $options = array()) {
+function db_truncate($table, array $options = []) {
   if (empty($options['target']) || $options['target'] == 'replica') {
     $options['target'] = 'default';
   }
@@ -288,7 +288,7 @@ function db_truncate($table, array $options = array()) {
  * @see \Drupal\Core\Database\Connection::select()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_select($table, $alias = NULL, array $options = array()) {
+function db_select($table, $alias = NULL, array $options = []) {
   if (empty($options['target'])) {
     $options['target'] = 'default';
   }
@@ -315,7 +315,7 @@ function db_select($table, $alias = NULL, array $options = array()) {
  * @see \Drupal\Core\Database\Connection::startTransaction()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_transaction($name = NULL, array $options = array()) {
+function db_transaction($name = NULL, array $options = []) {
   if (empty($options['target'])) {
     $options['target'] = 'default';
   }
@@ -451,7 +451,7 @@ function db_driver() {
  *
  * @see \Drupal\Core\Database\Database::closeConnection()
  */
-function db_close(array $options = array()) {
+function db_close(array $options = []) {
   if (empty($options['target'])) {
     $options['target'] = NULL;
   }
@@ -752,7 +752,7 @@ function db_drop_table($table) {
  * @see \Drupal\Core\Database\Schema::addField()
  * @see db_change_field()
  */
-function db_add_field($table, $field, $spec, $keys_new = array()) {
+function db_add_field($table, $field, $spec, $keys_new = []) {
   return Database::getConnection()->schema()->addField($table, $field, $spec, $keys_new);
 }
 
@@ -1020,7 +1020,7 @@ function db_drop_index($table, $name) {
  *
  * @see \Drupal\Core\Database\Schema::changeField()
  */
-function db_change_field($table, $field, $field_new, $spec, $keys_new = array()) {
+function db_change_field($table, $field, $field_new, $spec, $keys_new = []) {
   return Database::getConnection()->schema()->changeField($table, $field, $field_new, $spec, $keys_new);
 }
 
diff --git a/core/includes/entity.inc b/core/includes/entity.inc
index 67122a2b6a9509e2c4d8132cd6bda30a88a35e5a..45eaa3d8e40050237d047f3bb8ccb97d3e084c46 100644
--- a/core/includes/entity.inc
+++ b/core/includes/entity.inc
@@ -80,7 +80,7 @@ function entity_get_bundles($entity_type = NULL) {
 function entity_load($entity_type, $id, $reset = FALSE) {
   $controller = \Drupal::entityManager()->getStorage($entity_type);
   if ($reset) {
-    $controller->resetCache(array($id));
+    $controller->resetCache([$id]);
   }
   return $controller->load($id);
 }
@@ -305,7 +305,7 @@ function entity_delete_multiple($entity_type, array $ids) {
  * @see \Drupal\Core\Entity\EntityTypeManagerInterface::getStorage()
  * @see \Drupal\Core\Entity\EntityStorageInterface::create()
  */
-function entity_create($entity_type, array $values = array()) {
+function entity_create($entity_type, array $values = []) {
   return \Drupal::entityManager()
     ->getStorage($entity_type)
     ->create($values);
@@ -483,12 +483,12 @@ function entity_get_display($entity_type, $bundle, $view_mode) {
   // configuration entries are only created when a display object is explicitly
   // configured and saved.
   if (!$display) {
-    $display = EntityViewDisplay::create(array(
+    $display = EntityViewDisplay::create([
       'targetEntityType' => $entity_type,
       'bundle' => $bundle,
       'mode' => $view_mode,
       'status' => TRUE,
-    ));
+    ]);
   }
 
   return $display;
@@ -563,12 +563,12 @@ function entity_get_form_display($entity_type, $bundle, $form_mode) {
   // configuration entries are only created when an entity form display is
   // explicitly configured and saved.
   if (!$entity_form_display) {
-    $entity_form_display = EntityFormDisplay::create(array(
+    $entity_form_display = EntityFormDisplay::create([
       'targetEntityType' => $entity_type,
       'bundle' => $bundle,
       'mode' => $form_mode,
       'status' => TRUE,
-    ));
+    ]);
   }
 
   return $entity_form_display;
diff --git a/core/includes/errors.inc b/core/includes/errors.inc
index e3ad1c89e1743454453b9ebc416b33649f1e6a2e..40e290338dc0c1d41d0d8b54bab2ef62b6c48599 100644
--- a/core/includes/errors.inc
+++ b/core/includes/errors.inc
@@ -21,23 +21,23 @@
  * @ingroup logging_severity_levels
  */
 function drupal_error_levels() {
-  $types = array(
-    E_ERROR => array('Error', RfcLogLevel::ERROR),
-    E_WARNING => array('Warning', RfcLogLevel::WARNING),
-    E_PARSE => array('Parse error', RfcLogLevel::ERROR),
-    E_NOTICE => array('Notice', RfcLogLevel::NOTICE),
-    E_CORE_ERROR => array('Core error', RfcLogLevel::ERROR),
-    E_CORE_WARNING => array('Core warning', RfcLogLevel::WARNING),
-    E_COMPILE_ERROR => array('Compile error', RfcLogLevel::ERROR),
-    E_COMPILE_WARNING => array('Compile warning', RfcLogLevel::WARNING),
-    E_USER_ERROR => array('User error', RfcLogLevel::ERROR),
-    E_USER_WARNING => array('User warning', RfcLogLevel::WARNING),
-    E_USER_NOTICE => array('User notice', RfcLogLevel::NOTICE),
-    E_STRICT => array('Strict warning', RfcLogLevel::DEBUG),
-    E_RECOVERABLE_ERROR => array('Recoverable fatal error', RfcLogLevel::ERROR),
-    E_DEPRECATED => array('Deprecated function', RfcLogLevel::DEBUG),
-    E_USER_DEPRECATED => array('User deprecated function', RfcLogLevel::DEBUG),
-  );
+  $types = [
+    E_ERROR => ['Error', RfcLogLevel::ERROR],
+    E_WARNING => ['Warning', RfcLogLevel::WARNING],
+    E_PARSE => ['Parse error', RfcLogLevel::ERROR],
+    E_NOTICE => ['Notice', RfcLogLevel::NOTICE],
+    E_CORE_ERROR => ['Core error', RfcLogLevel::ERROR],
+    E_CORE_WARNING => ['Core warning', RfcLogLevel::WARNING],
+    E_COMPILE_ERROR => ['Compile error', RfcLogLevel::ERROR],
+    E_COMPILE_WARNING => ['Compile warning', RfcLogLevel::WARNING],
+    E_USER_ERROR => ['User error', RfcLogLevel::ERROR],
+    E_USER_WARNING => ['User warning', RfcLogLevel::WARNING],
+    E_USER_NOTICE => ['User notice', RfcLogLevel::NOTICE],
+    E_STRICT => ['Strict warning', RfcLogLevel::DEBUG],
+    E_RECOVERABLE_ERROR => ['Recoverable fatal error', RfcLogLevel::ERROR],
+    E_DEPRECATED => ['Deprecated function', RfcLogLevel::DEBUG],
+    E_USER_DEPRECATED => ['User deprecated function', RfcLogLevel::DEBUG],
+  ];
 
   return $types;
 }
@@ -70,7 +70,7 @@ function _drupal_error_handler_real($error_level, $message, $filename, $line, $c
     // in PHP, we allow them to trigger a fatal error by emitting a user error
     // using trigger_error().
     $to_string = $error_level == E_USER_ERROR && substr($caller['function'], -strlen('__toString()')) == '__toString()';
-    _drupal_log_error(array(
+    _drupal_log_error([
       '%type' => isset($types[$error_level]) ? $severity_msg : 'Unknown error',
       // The standard PHP error handler considers that the error messages
       // are HTML. We mimick this behavior here.
@@ -81,7 +81,7 @@ function _drupal_error_handler_real($error_level, $message, $filename, $line, $c
       'severity_level' => $severity_level,
       'backtrace' => $backtrace,
       '@backtrace_string' => (new \Exception())->getTraceAsString(),
-    ), $recoverable || $to_string);
+    ], $recoverable || $to_string);
   }
 }
 
@@ -139,15 +139,15 @@ function _drupal_log_error($error, $fatal = FALSE) {
     // $number does not use drupal_static as it should not be reset
     // as it uniquely identifies each PHP error.
     static $number = 0;
-    $assertion = array(
+    $assertion = [
       $error['@message'],
       $error['%type'],
-      array(
+      [
         'function' => $error['%function'],
         'file' => $error['%file'],
         'line' => $error['%line'],
-      ),
-    );
+      ],
+    ];
     // For non-fatal errors (e.g. PHP notices) _drupal_log_error can be called
     // multiple times per request. In that case the response is typically
     // generated outside of the error handler, e.g., in a controller. As a
@@ -257,10 +257,10 @@ function _drupal_log_error($error, $fatal = FALSE) {
 
       if ($is_installer) {
         // install_display_output() prints the output and ends script execution.
-        $output = array(
+        $output = [
           '#title' => 'Error',
           '#markup' => $message,
-        );
+        ];
         install_display_output($output, $GLOBALS['install_state'], $response->headers->all());
         exit;
       }
diff --git a/core/includes/file.inc b/core/includes/file.inc
index 0dcd141ca24814676a92ca5243028c0c18300401..c78ee5ba984a7ea3016e58915c47ebf64fa1f637 100644
--- a/core/includes/file.inc
+++ b/core/includes/file.inc
@@ -367,7 +367,7 @@ function file_save_htaccess($directory, $private = TRUE, $force_overwrite = FALS
     return drupal_chmod($htaccess_path, 0444);
   }
   else {
-    $variables = array('%directory' => $directory, '@htaccess' => $htaccess_lines);
+    $variables = ['%directory' => $directory, '@htaccess' => $htaccess_lines];
     \Drupal::logger('security')->error("Security warning: Couldn't write .htaccess file. Please create a .htaccess file in your %directory directory which contains the following lines: <pre><code>@htaccess</code></pre>", $variables);
     return FALSE;
   }
@@ -456,7 +456,7 @@ function file_unmanaged_copy($source, $destination = NULL, $replace = FILE_EXIST
   $real_destination = drupal_realpath($destination) ?: $destination;
   // Perform the copy operation.
   if (!@copy($real_source, $real_destination)) {
-    \Drupal::logger('file')->error('The specified file %file could not be copied to %destination.', array('%file' => $source, '%destination' => $destination));
+    \Drupal::logger('file')->error('The specified file %file could not be copied to %destination.', ['%file' => $source, '%destination' => $destination]);
     return FALSE;
   }
   // Set the permissions on the new file.
@@ -501,12 +501,12 @@ function file_unmanaged_prepare($source, &$destination = NULL, $replace = FILE_E
   // Assert that the source file actually exists.
   if (!file_exists($source)) {
     // @todo Replace drupal_set_message() calls with exceptions instead.
-    drupal_set_message(t('The specified file %file could not be moved/copied because no file by that name exists. Please check that you supplied the correct filename.', array('%file' => $original_source)), 'error');
+    drupal_set_message(t('The specified file %file could not be moved/copied because no file by that name exists. Please check that you supplied the correct filename.', ['%file' => $original_source]), 'error');
     if (($realpath = drupal_realpath($original_source)) !== FALSE) {
-      $logger->notice('File %file (%realpath) could not be moved/copied because it does not exist.', array('%file' => $original_source, '%realpath' => $realpath));
+      $logger->notice('File %file (%realpath) could not be moved/copied because it does not exist.', ['%file' => $original_source, '%realpath' => $realpath]);
     }
     else {
-      $logger->notice('File %file could not be moved/copied because it does not exist.', array('%file' => $original_source));
+      $logger->notice('File %file could not be moved/copied because it does not exist.', ['%file' => $original_source]);
     }
     return FALSE;
   }
@@ -527,8 +527,8 @@ function file_unmanaged_prepare($source, &$destination = NULL, $replace = FILE_E
     $dirname = drupal_dirname($destination);
     if (!file_prepare_directory($dirname)) {
       // The destination is not valid.
-      $logger->notice('File %file could not be moved/copied because the destination directory %destination is not configured correctly.', array('%file' => $original_source, '%destination' => $dirname));
-      drupal_set_message(t('The specified file %file could not be moved/copied because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.', array('%file' => $original_source)), 'error');
+      $logger->notice('File %file could not be moved/copied because the destination directory %destination is not configured correctly.', ['%file' => $original_source, '%destination' => $dirname]);
+      drupal_set_message(t('The specified file %file could not be moved/copied because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.', ['%file' => $original_source]), 'error');
       return FALSE;
     }
   }
@@ -536,8 +536,8 @@ function file_unmanaged_prepare($source, &$destination = NULL, $replace = FILE_E
   // Determine whether we can perform this operation based on overwrite rules.
   $destination = file_destination($destination, $replace);
   if ($destination === FALSE) {
-    drupal_set_message(t('The file %file could not be moved/copied because a file by that name already exists in the destination directory.', array('%file' => $original_source)), 'error');
-    $logger->notice('File %file could not be moved/copied because a file by that name already exists in the destination directory (%destination)', array('%file' => $original_source, '%destination' => $destination));
+    drupal_set_message(t('The file %file could not be moved/copied because a file by that name already exists in the destination directory.', ['%file' => $original_source]), 'error');
+    $logger->notice('File %file could not be moved/copied because a file by that name already exists in the destination directory (%destination)', ['%file' => $original_source, '%destination' => $destination]);
     return FALSE;
   }
 
@@ -545,8 +545,8 @@ function file_unmanaged_prepare($source, &$destination = NULL, $replace = FILE_E
   $real_source = drupal_realpath($source);
   $real_destination = drupal_realpath($destination);
   if ($source == $destination || ($real_source !== FALSE) && ($real_source == $real_destination)) {
-    drupal_set_message(t('The specified file %file was not moved/copied because it would overwrite itself.', array('%file' => $source)), 'error');
-    $logger->notice('File %file could not be moved/copied because it would overwrite itself.', array('%file' => $source));
+    drupal_set_message(t('The specified file %file was not moved/copied because it would overwrite itself.', ['%file' => $source]), 'error');
+    $logger->notice('File %file could not be moved/copied because it would overwrite itself.', ['%file' => $source]);
     return FALSE;
   }
   // Make sure the .htaccess files are present.
@@ -652,7 +652,7 @@ function file_unmanaged_move($source, $destination = NULL, $replace = FILE_EXIST
     // implemented. It's not necessary to use drupal_unlink() as the Windows
     // issue has already been resolved above.
     if (!@copy($real_source, $real_destination) || !@unlink($real_source)) {
-      \Drupal::logger('file')->error('The specified file %file could not be moved to %destination.', array('%file' => $source, '%destination' => $destination));
+      \Drupal::logger('file')->error('The specified file %file could not be moved to %destination.', ['%file' => $source, '%destination' => $destination]);
       return FALSE;
     }
   }
@@ -721,7 +721,7 @@ function file_munge_filename($filename, $extensions, $alerts = TRUE) {
     $filename = $new_filename . '.' . $final_extension;
 
     if ($alerts && $original != $filename) {
-      drupal_set_message(t('For security reasons, your upload has been renamed to %filename.', array('%filename' => $filename)));
+      drupal_set_message(t('For security reasons, your upload has been renamed to %filename.', ['%filename' => $filename]));
     }
   }
 
@@ -762,7 +762,7 @@ function file_create_filename($basename, $directory) {
   $basename = preg_replace('/[\x00-\x1F]/u', '_', $basename);
   if (substr(PHP_OS, 0, 3) == 'WIN') {
     // These characters are not allowed in Windows filenames
-    $basename = str_replace(array(':', '*', '?', '"', '<', '>', '|'), '_', $basename);
+    $basename = str_replace([':', '*', '?', '"', '<', '>', '|'], '_', $basename);
   }
 
   // A URI or path may already have a trailing slash or look like "public://".
@@ -810,7 +810,7 @@ function file_create_filename($basename, $directory) {
  * @see \Drupal\file\FileUsage\FileUsageBase::delete()
  */
 function file_delete($fid) {
-  return file_delete_multiple(array($fid));
+  return file_delete_multiple([$fid]);
 }
 
 /**
@@ -852,18 +852,18 @@ function file_unmanaged_delete($path) {
   }
   $logger = \Drupal::logger('file');
   if (is_dir($path)) {
-    $logger->error('%path is a directory and cannot be removed using file_unmanaged_delete().', array('%path' => $path));
+    $logger->error('%path is a directory and cannot be removed using file_unmanaged_delete().', ['%path' => $path]);
     return FALSE;
   }
   // Return TRUE for non-existent file, but log that nothing was actually
   // deleted, as the current state is the intended result.
   if (!file_exists($path)) {
-    $logger->notice('The file %path was not deleted because it does not exist.', array('%path' => $path));
+    $logger->notice('The file %path was not deleted because it does not exist.', ['%path' => $path]);
     return TRUE;
   }
   // We cannot handle anything other than files and directories. Log an error
   // for everything else (sockets, symbolic links, etc).
-  $logger->error('The file %path is not of a recognized type so it was not deleted.', array('%path' => $path));
+  $logger->error('The file %path is not of a recognized type so it was not deleted.', ['%path' => $path]);
   return FALSE;
 }
 
@@ -999,14 +999,14 @@ function file_unmanaged_save_data($data, $destination = NULL, $replace = FILE_EX
  *   An associative array (keyed on the chosen key) of objects with 'uri',
  *   'filename', and 'name' properties corresponding to the matched files.
  */
-function file_scan_directory($dir, $mask, $options = array(), $depth = 0) {
+function file_scan_directory($dir, $mask, $options = [], $depth = 0) {
   // Merge in defaults.
-  $options += array(
+  $options += [
     'callback' => 0,
     'recurse' => TRUE,
     'key' => 'uri',
     'min_depth' => 0,
-  );
+  ];
   // Normalize $dir only once.
   if ($depth == 0) {
     $dir = file_stream_wrapper_uri_normalize($dir);
@@ -1025,8 +1025,8 @@ function file_scan_directory($dir, $mask, $options = array(), $depth = 0) {
     $default_nomask = '/^' . implode('|', $ignore_directories) . '$/';
   }
 
-  $options['key'] = in_array($options['key'], array('uri', 'filename', 'name')) ? $options['key'] : 'uri';
-  $files = array();
+  $options['key'] = in_array($options['key'], ['uri', 'filename', 'name']) ? $options['key'] : 'uri';
+  $files = [];
   // Avoid warnings when opendir does not have the permissions to open a
   // directory.
   if (is_dir($dir)) {
@@ -1067,7 +1067,7 @@ function file_scan_directory($dir, $mask, $options = array(), $depth = 0) {
       closedir($handle);
     }
     else {
-      \Drupal::logger('file')->error('@dir can not be opened', array('@dir' => $dir));
+      \Drupal::logger('file')->error('@dir can not be opened', ['@dir' => $dir]);
     }
   }
 
diff --git a/core/includes/form.inc b/core/includes/form.inc
index 2e2d2be98f345788d8eac5588fa98189cfcbb61a..05f2a9e1fcea5dcdc81c063ee47100c826505b9a 100644
--- a/core/includes/form.inc
+++ b/core/includes/form.inc
@@ -29,8 +29,8 @@
  */
 function template_preprocess_select(&$variables) {
   $element = $variables['element'];
-  Element::setAttributes($element, array('id', 'name', 'size'));
-  RenderElement::setAttributes($element, array('form-select'));
+  Element::setAttributes($element, ['id', 'name', 'size']);
+  RenderElement::setAttributes($element, ['form-select']);
 
   $variables['attributes'] = $element['#attributes'];
   $variables['options'] = form_select_options($element);
@@ -161,7 +161,7 @@ function form_select_options($element, $choices = NULL) {
  *   empty if no elements were found. FALSE if optgroups were found.
  */
 function form_get_options($element, $key) {
-  $keys = array();
+  $keys = [];
   foreach ($element['#options'] as $index => $choice) {
     if (is_array($choice)) {
       return FALSE;
@@ -191,9 +191,9 @@ function form_get_options($element, $key) {
  */
 function template_preprocess_fieldset(&$variables) {
   $element = $variables['element'];
-  Element::setAttributes($element, array('id'));
+  Element::setAttributes($element, ['id']);
   RenderElement::setAttributes($element);
-  $variables['attributes'] = isset($element['#attributes']) ? $element['#attributes'] : array();
+  $variables['attributes'] = isset($element['#attributes']) ? $element['#attributes'] : [];
   $variables['prefix'] = isset($element['#field_prefix']) ? $element['#field_prefix'] : NULL;
   $variables['suffix'] = isset($element['#field_suffix']) ? $element['#field_suffix'] : NULL;
   $variables['title_display'] = isset($element['#title_display']) ? $element['#title_display'] : NULL;
@@ -273,7 +273,7 @@ function template_preprocess_details(&$variables) {
  */
 function template_preprocess_radios(&$variables) {
   $element = $variables['element'];
-  $variables['attributes'] = array();
+  $variables['attributes'] = [];
   if (isset($element['#id'])) {
     $variables['attributes']['id'] = $element['#id'];
   }
@@ -295,7 +295,7 @@ function template_preprocess_radios(&$variables) {
  */
 function template_preprocess_checkboxes(&$variables) {
   $element = $variables['element'];
-  $variables['attributes'] = array();
+  $variables['attributes'] = [];
   if (isset($element['#id'])) {
     $variables['attributes']['id'] = $element['#id'];
   }
@@ -354,7 +354,7 @@ function template_preprocess_form(&$variables) {
   if (isset($element['#action'])) {
     $element['#attributes']['action'] = UrlHelper::stripDangerousProtocols($element['#action']);
   }
-  Element::setAttributes($element, array('method', 'id'));
+  Element::setAttributes($element, ['method', 'id']);
   if (empty($element['#attributes']['accept-charset'])) {
     $element['#attributes']['accept-charset'] = "UTF-8";
   }
@@ -375,8 +375,8 @@ function template_preprocess_form(&$variables) {
  */
 function template_preprocess_textarea(&$variables) {
   $element = $variables['element'];
-  Element::setAttributes($element, array('id', 'name', 'rows', 'cols', 'placeholder'));
-  RenderElement::setAttributes($element, array('form-textarea'));
+  Element::setAttributes($element, ['id', 'name', 'rows', 'cols', 'placeholder']);
+  RenderElement::setAttributes($element, ['form-textarea']);
   $variables['wrapper_attributes'] = new Attribute();
   $variables['attributes'] = new Attribute($element['#attributes']);
   $variables['value'] = $element['#value'];
@@ -429,11 +429,11 @@ function template_preprocess_form_element(&$variables) {
   // This function is invoked as theme wrapper, but the rendered form element
   // may not necessarily have been processed by
   // \Drupal::formBuilder()->doBuildForm().
-  $element += array(
+  $element += [
     '#title_display' => 'before',
-    '#wrapper_attributes' => array(),
-    '#label_attributes' => array(),
-  );
+    '#wrapper_attributes' => [],
+    '#label_attributes' => [],
+  ];
   $variables['attributes'] = $element['#wrapper_attributes'];
 
   // Add element #id for #type 'item'.
@@ -478,8 +478,8 @@ function template_preprocess_form_element(&$variables) {
 
   // Add label_display and label variables to template.
   $variables['label_display'] = $element['#title_display'];
-  $variables['label'] = array('#theme' => 'form_element_label');
-  $variables['label'] += array_intersect_key($element, array_flip(array('#id', '#required', '#title', '#title_display')));
+  $variables['label'] = ['#theme' => 'form_element_label'];
+  $variables['label'] += array_intersect_key($element, array_flip(['#id', '#required', '#title', '#title_display']));
   $variables['label']['#attributes'] = $element['#label_attributes'];
 
   $variables['children'] = $element['#children'];
@@ -717,26 +717,26 @@ function batch_set($batch_definition) {
 
     // Initialize the batch if needed.
     if (empty($batch)) {
-      $batch = array(
-        'sets' => array(),
+      $batch = [
+        'sets' => [],
         'has_form_submits' => FALSE,
-      );
+      ];
     }
 
     // Base and default properties for the batch set.
-    $init = array(
-      'sandbox' => array(),
-      'results' => array(),
+    $init = [
+      'sandbox' => [],
+      'results' => [],
       'success' => FALSE,
       'start' => 0,
       'elapsed' => 0,
-    );
-    $defaults = array(
+    ];
+    $defaults = [
       'title' => t('Processing'),
       'init_message' => t('Initializing.'),
       'progress_message' => t('Completed @current of @total.'),
       'error_message' => t('An error has occurred.'),
-    );
+    ];
     $batch_set = $init + $batch_definition + $defaults;
 
     // Tweak init_message to avoid the bottom of the page flickering down after
@@ -760,7 +760,7 @@ function batch_set($batch_definition) {
       $index = $batch['current_set'] + 1;
       $slice1 = array_slice($batch['sets'], 0, $index);
       $slice2 = array_slice($batch['sets'], $index);
-      $batch['sets'] = array_merge($slice1, array($batch_set), $slice2);
+      $batch['sets'] = array_merge($slice1, [$batch_set], $slice2);
       _batch_populate_queue($batch, $index);
     }
   }
@@ -800,7 +800,7 @@ function batch_process($redirect = NULL, Url $url = NULL, $redirect_callback = N
 
   if (isset($batch)) {
     // Add process information
-    $process_info = array(
+    $process_info = [
       'current_set' => 0,
       'progressive' => TRUE,
       'url' => isset($url) ? $url : Url::fromRoute('system.batch_page.html'),
@@ -808,7 +808,7 @@ function batch_process($redirect = NULL, Url $url = NULL, $redirect_callback = N
       'batch_redirect' => $redirect,
       'theme' => \Drupal::theme()->getActiveTheme()->getName(),
       'redirect_callback' => $redirect_callback,
-    );
+    ];
     $batch += $process_info;
 
     // The batch is now completely built. Allow other modules to make changes
@@ -839,7 +839,7 @@ function batch_process($redirect = NULL, Url $url = NULL, $redirect_callback = N
       $query_options['op'] = 'finished';
       $error_url->setOption('query', $query_options);
 
-      $batch['error_message'] = t('Please continue to <a href=":error_url">the error page</a>', array(':error_url' => $error_url->toString(TRUE)->getGeneratedUrl()));
+      $batch['error_message'] = t('Please continue to <a href=":error_url">the error page</a>', [':error_url' => $error_url->toString(TRUE)->getGeneratedUrl()]);
 
       // Clear the way for the redirection to the batch processing page, by
       // saving and unsetting the 'destination', if there is any.
@@ -886,7 +886,7 @@ function &batch_get() {
   // that are part of the Batch API and need to reset the batch information may
   // call batch_get() and manipulate the result by reference. Functions that are
   // not part of the Batch API can also do this, but shouldn't.
-  static $batch = array();
+  static $batch = [];
   return $batch;
 }
 
@@ -907,12 +907,12 @@ function _batch_populate_queue(&$batch, $set_id) {
   $batch_set = &$batch['sets'][$set_id];
 
   if (isset($batch_set['operations'])) {
-    $batch_set += array(
-      'queue' => array(
+    $batch_set += [
+      'queue' => [
         'name' => 'drupal_batch:' . $batch['id'] . ':' . $set_id,
         'class' => $batch['progressive'] ? 'Drupal\Core\Queue\Batch' : 'Drupal\Core\Queue\BatchMemory',
-      ),
-    );
+      ],
+    ];
 
     $queue = _batch_queue($batch_set);
     $queue->createQueue();
@@ -937,7 +937,7 @@ function _batch_queue($batch_set) {
   static $queues;
 
   if (!isset($queues)) {
-    $queues = array();
+    $queues = [];
   }
 
   if (isset($batch_set['queue'])) {
diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index ca66c11398e696d0b875e0b05133b8dcdfb131f1..cfc0497bbcc4d5565fbb547cb0cdc2c59ee6a18e 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -92,11 +92,11 @@
  *
  * @see install_state_defaults()
  */
-function install_drupal($class_loader, $settings = array()) {
+function install_drupal($class_loader, $settings = []) {
   // Support the old way of calling this function with just a settings array.
   // @todo Remove this when Drush is updated in the Drupal testing
   //   infrastructure in https://www.drupal.org/node/2389243
-  if (is_array($class_loader) && $settings === array()) {
+  if (is_array($class_loader) && $settings === []) {
     $settings = $class_loader;
     $class_loader = require __DIR__ . '/../../autoload.php';
   }
@@ -106,7 +106,7 @@ function install_drupal($class_loader, $settings = array()) {
   // as well as a boolean indicating whether or not this is an interactive
   // installation.
   $interactive = empty($settings);
-  $install_state = $settings + array('interactive' => $interactive) + install_state_defaults();
+  $install_state = $settings + ['interactive' => $interactive] + install_state_defaults();
 
   try {
     // Begin the page request. This adds information about the current state of
@@ -121,10 +121,10 @@ function install_drupal($class_loader, $settings = array()) {
     if (!$install_state['interactive']) {
       throw $e;
     }
-    $output = array(
+    $output = [
       '#title' => $e->getTitle(),
       '#markup' => $e->getMessage(),
-    );
+    ];
   }
 
   // After execution, all tasks might be complete, in which case
@@ -182,7 +182,7 @@ function install_drupal($class_loader, $settings = array()) {
  * @see \Drupal\Core\Form\FormBuilderInterface::submitForm()
  */
 function install_state_defaults() {
-  $defaults = array(
+  $defaults = [
     // The current task being processed.
     'active_task' => NULL,
     // The last task that was completed during the previous installation
@@ -207,7 +207,7 @@ function install_state_defaults() {
     // installation task that the form submission is for, and the values are
     // used as the $form_state->getValues() array that is passed on to the form
     // submission via \Drupal::formBuilder()->submitForm().
-    'forms' => array(),
+    'forms' => [],
     // This becomes TRUE only at the end of the installation process, after
     // all available tasks have been completed and Drupal is fully installed.
     // It is used by the installer to store correct information in the database
@@ -224,16 +224,16 @@ function install_state_defaults() {
     // and 'langcode' (the code of the chosen installation language), since
     // these settings need to persist from page request to page request before
     // the database is available for storage.
-    'parameters' => array(),
+    'parameters' => [],
     // Whether or not the parameters have changed during the current page
     // request. For interactive installations, this will trigger a page
     // redirect.
     'parameters_changed' => FALSE,
     // An array of information about the chosen installation profile. This will
     // be filled in based on the profile's .info.yml file.
-    'profile_info' => array(),
+    'profile_info' => [],
     // An array of available installation profiles.
-    'profiles' => array(),
+    'profiles' => [],
     // The name of the theme to use during installation.
     'theme' => 'seven',
     // The server URL where the interface translation files can be downloaded.
@@ -261,11 +261,11 @@ function install_state_defaults() {
     'task_not_complete' => FALSE,
     // A list of installation tasks which have already been performed during
     // the current page request.
-    'tasks_performed' => array(),
+    'tasks_performed' => [],
     // An array of translation files URIs available for the installation. Keyed
     // by the translation language code.
-    'translations' => array(),
-  );
+    'translations' => [],
+  ];
   return $defaults;
 }
 
@@ -353,7 +353,7 @@ function install_begin_request($class_loader, &$install_state) {
   // Register the stream wrapper manager.
   $container
     ->register('stream_wrapper_manager', 'Drupal\Core\StreamWrapper\StreamWrapperManager')
-    ->addMethodCall('setContainer', array(new Reference('service_container')));
+    ->addMethodCall('setContainer', [new Reference('service_container')]);
   $container
     ->register('file_system', 'Drupal\Core\File\FileSystem')
     ->addArgument(new Reference('stream_wrapper_manager'))
@@ -429,7 +429,7 @@ function install_begin_request($class_loader, &$install_state) {
 
   // Add list of all available profiles to the installation state.
   $listing = new ExtensionDiscovery($container->get('app.root'));
-  $listing->setProfileDirectories(array());
+  $listing->setProfileDirectories([]);
   $install_state['profiles'] += $listing->scan('profile');
 
   // Prime drupal_get_filename()'s static cache.
@@ -453,7 +453,7 @@ function install_begin_request($class_loader, &$install_state) {
 
   // Set the default language to the selected language, if any.
   if (isset($install_state['parameters']['langcode'])) {
-    $default_language = new Language(array('id' => $install_state['parameters']['langcode']));
+    $default_language = new Language(['id' => $install_state['parameters']['langcode']]);
     $container->get('language.default')->set($default_language);
     \Drupal::translation()->setDefaultLangcode($install_state['parameters']['langcode']);
   }
@@ -596,7 +596,7 @@ function install_run_task($task, &$install_state) {
       }
       // Create a one item list of batches if only one batch was provided.
       if (isset($batches['operations'])) {
-        $batches = array($batches);
+        $batches = [$batches];
       }
       foreach ($batches as $batch) {
         batch_set($batch);
@@ -726,26 +726,26 @@ function install_tasks($install_state) {
 
   // Start with the core installation tasks that run before handing control
   // to the installation profile.
-  $tasks = array(
-    'install_select_language' => array(
+  $tasks = [
+    'install_select_language' => [
       'display_name' => t('Choose language'),
       'run' => INSTALL_TASK_RUN_IF_REACHED,
-    ),
-    'install_download_translation' => array(
+    ],
+    'install_download_translation' => [
       'run' => $needs_download ? INSTALL_TASK_RUN_IF_REACHED : INSTALL_TASK_SKIP,
-    ),
-    'install_select_profile' => array(
+    ],
+    'install_select_profile' => [
       'display_name' => t('Choose profile'),
       'display' => empty($install_state['profile_info']['distribution']['name']) && count($install_state['profiles']) != 1,
       'run' => INSTALL_TASK_RUN_IF_REACHED,
-    ),
-    'install_load_profile' => array(
+    ],
+    'install_load_profile' => [
       'run' => INSTALL_TASK_RUN_IF_REACHED,
-    ),
-    'install_verify_requirements' => array(
+    ],
+    'install_verify_requirements' => [
       'display_name' => t('Verify requirements'),
-    ),
-    'install_settings_form' => array(
+    ],
+    'install_settings_form' => [
       'display_name' => t('Set up database'),
       'type' => 'form',
       // Even though the form only allows the user to enter database settings,
@@ -753,39 +753,39 @@ function install_tasks($install_state) {
       // since the form submit handler is where settings.php is rewritten.
       'run' => $install_state['settings_verified'] ? INSTALL_TASK_SKIP : INSTALL_TASK_RUN_IF_NOT_COMPLETED,
       'function' => 'Drupal\Core\Installer\Form\SiteSettingsForm',
-    ),
-    'install_write_profile' => array(
-    ),
-    'install_verify_database_ready' => array(
+    ],
+    'install_write_profile' => [
+    ],
+    'install_verify_database_ready' => [
       'run' => $install_state['database_ready'] ? INSTALL_TASK_SKIP : INSTALL_TASK_RUN_IF_NOT_COMPLETED,
-    ),
-    'install_base_system' => array(
+    ],
+    'install_base_system' => [
       'run' => $install_state['base_system_verified'] ? INSTALL_TASK_SKIP : INSTALL_TASK_RUN_IF_NOT_COMPLETED,
-    ),
+    ],
     // All tasks below are executed in a regular, full Drupal environment.
-    'install_bootstrap_full' => array(
+    'install_bootstrap_full' => [
       'run' => INSTALL_TASK_RUN_IF_REACHED,
-    ),
-    'install_profile_modules' => array(
+    ],
+    'install_profile_modules' => [
       'display_name' => t('Install site'),
       'type' => 'batch',
-    ),
-    'install_profile_themes' => array(
-    ),
-    'install_install_profile' => array(
-    ),
-    'install_import_translations' => array(
+    ],
+    'install_profile_themes' => [
+    ],
+    'install_install_profile' => [
+    ],
+    'install_import_translations' => [
       'display_name' => t('Set up translations'),
       'display' => $needs_translations,
       'type' => 'batch',
       'run' => $needs_translations ? INSTALL_TASK_RUN_IF_NOT_COMPLETED : INSTALL_TASK_SKIP,
-    ),
-    'install_configure_form' => array(
+    ],
+    'install_configure_form' => [
       'display_name' => t('Configure site'),
       'type' => 'form',
       'function' => 'Drupal\Core\Installer\Form\SiteConfigureForm',
-    ),
-  );
+    ],
+  ];
 
   // Now add any tasks defined by the installation profile.
   if (!empty($install_state['parameters']['profile'])) {
@@ -806,16 +806,16 @@ function install_tasks($install_state) {
   }
 
   // Finish by adding the remaining core tasks.
-  $tasks += array(
-    'install_finish_translations' => array(
+  $tasks += [
+    'install_finish_translations' => [
       'display_name' => t('Finish translations'),
       'display' => $needs_translations,
       'type' => 'batch',
       'run' => $needs_translations ? INSTALL_TASK_RUN_IF_NOT_COMPLETED : INSTALL_TASK_SKIP,
-    ),
-    'install_finished' => array(
-    ),
-  );
+    ],
+    'install_finished' => [
+    ],
+  ];
 
   // Allow the installation profile to modify the full list of tasks.
   if (!empty($install_state['parameters']['profile'])) {
@@ -830,13 +830,13 @@ function install_tasks($install_state) {
 
   // Fill in default parameters for each task before returning the list.
   foreach ($tasks as $task_name => &$task) {
-    $task += array(
+    $task += [
       'display_name' => NULL,
       'display' => !empty($task['display_name']),
       'type' => 'normal',
       'run' => INSTALL_TASK_RUN_IF_NOT_COMPLETED,
       'function' => $task_name,
-    );
+    ];
   }
   return $tasks;
 }
@@ -857,7 +857,7 @@ function install_tasks($install_state) {
  * @see maintenance-task-list.html.twig
  */
 function install_tasks_to_display($install_state) {
-  $displayed_tasks = array();
+  $displayed_tasks = [];
   foreach (install_tasks($install_state) as $name => $task) {
     if ($task['display']) {
       $displayed_tasks[$name] = $task['display_name'];
@@ -971,39 +971,39 @@ function install_display_output($output, $install_state) {
   // resulting in /subfolder/install.php being found through search engines.
   // When settings.php is writeable this can be used via an external database
   // leading a malicious user to gain php access to the server.
-  $noindex_meta_tag = array(
+  $noindex_meta_tag = [
     '#tag' => 'meta',
-    '#attributes' => array(
+    '#attributes' => [
       'name' => 'robots',
       'content' => 'noindex, nofollow',
-    ),
-  );
+    ],
+  ];
   $output['#attached']['html_head'][] = [$noindex_meta_tag, 'install_meta_robots'];
 
   // Only show the task list if there is an active task; otherwise, the page
   // request has ended before tasks have even been started, so there is nothing
   // meaningful to show.
-  $regions = array();
+  $regions = [];
   if (isset($install_state['active_task'])) {
     // Let the theming function know when every step of the installation has
     // been completed.
     $active_task = $install_state['installation_finished'] ? NULL : $install_state['active_task'];
-    $task_list = array(
+    $task_list = [
       '#theme' => 'maintenance_task_list',
       '#items' => install_tasks_to_display($install_state),
       '#active' => $active_task,
-    );
+    ];
     $regions['sidebar_first'] = $task_list;
   }
 
   $bare_html_page_renderer = \Drupal::service('bare_html_page_renderer');
   $response = $bare_html_page_renderer->renderBarePage($output, $output['#title'], 'install_page', $regions);
-  $default_headers = array(
+  $default_headers = [
     'Expires' => 'Sun, 19 Nov 1978 05:00:00 GMT',
     'Last-Modified' => gmdate(DATE_RFC1123, REQUEST_TIME),
     'Cache-Control' => 'no-cache, must-revalidate',
     'ETag' => '"' . REQUEST_TIME . '"',
-  );
+  ];
   $response->headers->add($default_headers);
   $response->send();
   exit;
@@ -1069,13 +1069,13 @@ function install_base_system(&$install_state) {
 
   // Enable the user module so that sessions can be recorded during the
   // upcoming bootstrap step.
-  \Drupal::service('module_installer')->install(array('user'), FALSE);
+  \Drupal::service('module_installer')->install(['user'], FALSE);
 
   // Save the list of other modules to install for the upcoming tasks.
   // State can be set to the database now that system.module is installed.
   $modules = $install_state['profile_info']['dependencies'];
 
-  \Drupal::state()->set('install_profile_modules', array_diff($modules, array('system')));
+  \Drupal::state()->set('install_profile_modules', array_diff($modules, ['system']));
   $install_state['base_system_verified'] = TRUE;
 }
 
@@ -1142,13 +1142,13 @@ function install_verify_database_ready() {
  * Checks a database connection and returns any errors.
  */
 function install_database_errors($database, $settings_file) {
-  $errors = array();
+  $errors = [];
 
   // Check database type.
   $database_types = drupal_get_database_types();
   $driver = $database['driver'];
   if (!isset($database_types[$driver])) {
-    $errors['driver'] = t("In your %settings_file file you have configured @drupal to use a %driver server, however your PHP installation currently does not support this database type.", array('%settings_file' => $settings_file, '@drupal' => drupal_install_profile_distribution_name(), '%driver' => $driver));
+    $errors['driver'] = t("In your %settings_file file you have configured @drupal to use a %driver server, however your PHP installation currently does not support this database type.", ['%settings_file' => $settings_file, '@drupal' => drupal_install_profile_distribution_name(), '%driver' => $driver]);
   }
   else {
     // Run driver specific validation
@@ -1260,10 +1260,10 @@ function _install_select_profile(&$install_state) {
  * @see file_scan_directory()
  */
 function install_find_translations() {
-  $translations = array();
+  $translations = [];
   $files = \Drupal::service('string_translator.file_translation')->findTranslationFiles();
   // English does not need a translation file.
-  array_unshift($files, (object) array('name' => 'en'));
+  array_unshift($files, (object) ['name' => 'en']);
   foreach ($files as $uri => $file) {
     // Strip off the file name component before the language code.
     $langcode = preg_replace('!^(.+\.)?([^\.]+)$!', '\2', $file->name);
@@ -1384,7 +1384,7 @@ function install_retrieve_file($uri, $destination) {
   }
 
   try {
-    $response = \Drupal::httpClient()->get($uri, array('headers' => array('Accept' => 'text/plain')));
+    $response = \Drupal::httpClient()->get($uri, ['headers' => ['Accept' => 'text/plain']]);
     $data = (string) $response->getBody();
     if (empty($data)) {
       return FALSE;
@@ -1491,14 +1491,14 @@ function install_profile_modules(&$install_state) {
   // as those will not be handled by the module installer.
   install_core_entity_type_definitions();
 
-  $modules = \Drupal::state()->get('install_profile_modules') ?: array();
+  $modules = \Drupal::state()->get('install_profile_modules') ?: [];
   $files = system_rebuild_module_data();
   \Drupal::state()->delete('install_profile_modules');
 
   // Always install required modules first. Respect the dependencies between
   // the modules.
-  $required = array();
-  $non_required = array();
+  $required = [];
+  $non_required = [];
 
   // Add modules that other modules depend on.
   foreach ($modules as $module) {
@@ -1518,15 +1518,15 @@ function install_profile_modules(&$install_state) {
   arsort($required);
   arsort($non_required);
 
-  $operations = array();
+  $operations = [];
   foreach ($required + $non_required as $module => $weight) {
-    $operations[] = array('_install_module_batch', array($module, $files[$module]->info['name']));
+    $operations[] = ['_install_module_batch', [$module, $files[$module]->info['name']]];
   }
-  $batch = array(
+  $batch = [
     'operations' => $operations,
-    'title' => t('Installing @drupal', array('@drupal' => drupal_install_profile_distribution_name())),
+    'title' => t('Installing @drupal', ['@drupal' => drupal_install_profile_distribution_name()]),
     'error_message' => t('The installation has encountered an error.'),
-  );
+  ];
   return $batch;
 }
 
@@ -1569,7 +1569,7 @@ function install_profile_themes(&$install_state) {
  *   An array of information about the current installation state.
  */
 function install_install_profile(&$install_state) {
-  \Drupal::service('module_installer')->install(array(drupal_get_profile()), FALSE);
+  \Drupal::service('module_installer')->install([drupal_get_profile()], FALSE);
   // Install all available optional config. During installation the module order
   // is determined by dependencies. If there are no dependencies between modules
   // then the order in which they are installed is dependent on random factors
@@ -1612,21 +1612,21 @@ function install_download_additional_translations_operations(&$install_state) {
       ->save();
     \Drupal::service('language.default')->set($language);
     if (empty($install_state['profile_info']['keep_english'])) {
-      entity_delete_multiple('configurable_language', array('en'));
+      entity_delete_multiple('configurable_language', ['en']);
     }
   }
 
   // If there is more than one language or the single one is not English, we
   // should download/import translations.
   $languages = \Drupal::languageManager()->getLanguages();
-  $operations = array();
+  $operations = [];
   foreach ($languages as $langcode => $language) {
     // The installer language was already downloaded. Check downloads for the
     // other languages if any. Ignore any download errors here, since we
     // are in the middle of an install process and there is no way back. We
     // will not import what we cannot download.
     if ($langcode != 'en' && $langcode != $install_state['parameters']['langcode']) {
-      $operations[] = array('install_check_translations', array($langcode, $install_state['server_pattern']));
+      $operations[] = ['install_check_translations', [$langcode, $install_state['server_pattern']]];
     }
   }
   return $operations;
@@ -1649,26 +1649,26 @@ function install_import_translations(&$install_state) {
   $operations = install_download_additional_translations_operations($install_state);
   $languages = \Drupal::languageManager()->getLanguages();
   if (count($languages) > 1 || !isset($languages['en'])) {
-    $operations[] = array('_install_prepare_import', array(array_keys($languages), $install_state['server_pattern']));
+    $operations[] = ['_install_prepare_import', [array_keys($languages), $install_state['server_pattern']]];
 
     // Set up a batch to import translations for drupal core. Translation import
     // for contrib modules happens in install_import_translations_remaining.
     foreach ($languages as $language) {
       if (locale_translation_use_remote_source()) {
-        $operations[] = array('locale_translation_batch_fetch_download', array('drupal', $language->getId()));
+        $operations[] = ['locale_translation_batch_fetch_download', ['drupal', $language->getId()]];
       }
-      $operations[] = array('locale_translation_batch_fetch_import', array('drupal', $language->getId(), array()));
+      $operations[] = ['locale_translation_batch_fetch_import', ['drupal', $language->getId(), []]];
     }
 
     module_load_include('fetch.inc', 'locale');
-    $batch = array(
+    $batch = [
       'operations' => $operations,
       'title' => t('Updating translations.'),
       'progress_message' => '',
       'error_message' => t('Error importing translation files'),
       'finished' => 'locale_translation_batch_fetch_finished',
       'file' => drupal_get_path('module', 'locale') . '/locale.batch.inc',
-    );
+    ];
     return $batch;
   }
 }
@@ -1683,11 +1683,11 @@ function install_import_translations(&$install_state) {
  */
 function _install_prepare_import($langcodes, $server_pattern) {
   \Drupal::moduleHandler()->loadInclude('locale', 'bulk.inc');
-  $matches = array();
+  $matches = [];
 
   foreach ($langcodes as $langcode) {
     // Get the translation files located in the translations directory.
-    $files = locale_translate_get_interface_translation_files(array('drupal'), array($langcode));
+    $files = locale_translate_get_interface_translation_files(['drupal'], [$langcode]);
     // Pick the first file which matches the language, if any.
     $file = reset($files);
     if (is_object($file)) {
@@ -1700,17 +1700,17 @@ function _install_prepare_import($langcodes, $server_pattern) {
         // we check if at least the major version number is available.
         if ($info['major']) {
           $core = $info['major'] . '.x';
-          $data = array(
+          $data = [
             'name' => 'drupal',
             'project_type' => 'module',
             'core' => $core,
             'version' => $version,
             'server_pattern' => $server_pattern,
             'status' => 1,
-          );
+          ];
           \Drupal::service('locale.project')->set($data['name'], $data);
           module_load_include('compare.inc', 'locale');
-          locale_translation_check_projects_local(array('drupal'), array($langcode));
+          locale_translation_check_projects_local(['drupal'], [$langcode]);
         }
       }
     }
@@ -1739,16 +1739,16 @@ function install_finish_translations(&$install_state) {
   // using a batch.
   $projects = locale_translation_build_projects();
   $languages = \Drupal::languageManager()->getLanguages();
-  $batches = array();
+  $batches = [];
   if (count($projects) > 1) {
     $options = _locale_translation_default_update_options();
-    if ($batch = locale_translation_batch_update_build(array(), array_keys($languages), $options)) {
+    if ($batch = locale_translation_batch_update_build([], array_keys($languages), $options)) {
       $batches[] = $batch;
     }
   }
 
   // Creates configuration translations.
-  $batches[] = locale_config_batch_update_components(array(), array_keys($languages));
+  $batches[] = locale_config_batch_update_components([], array_keys($languages));
   return $batches;
 }
 
@@ -1785,9 +1785,9 @@ function install_finished(&$install_state) {
     user_login_finalize($account);
   }
 
-  $success_message = t('Congratulations, you installed @drupal!', array(
+  $success_message = t('Congratulations, you installed @drupal!', [
     '@drupal' => drupal_install_profile_distribution_name(),
-  ));
+  ]);
   drupal_set_message($success_message);
 }
 
@@ -1797,9 +1797,9 @@ function install_finished(&$install_state) {
  * Performs batch installation of modules.
  */
 function _install_module_batch($module, $module_name, &$context) {
-  \Drupal::service('module_installer')->install(array($module), FALSE);
+  \Drupal::service('module_installer')->install([$module], FALSE);
   $context['results'][] = $module;
-  $context['message'] = t('Installed %module module.', array('%module' => $module_name));
+  $context['message'] = t('Installed %module module.', ['%module' => $module_name]);
 }
 
 /**
@@ -1816,7 +1816,7 @@ function _install_module_batch($module, $module_name, &$context) {
  *   error with detailed information.
  */
 function install_check_translations($langcode, $server_pattern) {
-  $requirements = array();
+  $requirements = [];
 
   $readable = FALSE;
   $writable = FALSE;
@@ -1845,12 +1845,12 @@ function install_check_translations($langcode, $server_pattern) {
   }
 
   // Build URL for the translation file and the translation server.
-  $variables = array(
+  $variables = [
     '%project' => 'drupal',
     '%version' => \Drupal::VERSION,
     '%core' => \Drupal::CORE_COMPATIBILITY,
     '%language' => $langcode,
-  );
+  ];
   $translation_url = strtr($server_pattern, $variables);
 
   $elements = parse_url($translation_url);
@@ -1874,73 +1874,73 @@ function install_check_translations($langcode, $server_pattern) {
 
   // If the translations directory does not exists, throw an error.
   if (!$translations_directory_exists) {
-    $requirements['translations directory exists'] = array(
+    $requirements['translations directory exists'] = [
       'title'       => t('Translations directory'),
       'value'       => t('The translations directory does not exist.'),
       'severity'    => REQUIREMENT_ERROR,
-      'description' => t('The installer requires that you create a translations directory as part of the installation process. Create the directory %translations_directory . More details about installing Drupal are available in <a href=":install_txt">INSTALL.txt</a>.', array('%translations_directory' => $translations_directory, ':install_txt' => base_path() . 'core/INSTALL.txt')),
-    );
+      'description' => t('The installer requires that you create a translations directory as part of the installation process. Create the directory %translations_directory . More details about installing Drupal are available in <a href=":install_txt">INSTALL.txt</a>.', ['%translations_directory' => $translations_directory, ':install_txt' => base_path() . 'core/INSTALL.txt']),
+    ];
   }
   else {
-    $requirements['translations directory exists'] = array(
+    $requirements['translations directory exists'] = [
       'title'       => t('Translations directory'),
-      'value'       => t('The directory %translations_directory exists.', array('%translations_directory' => $translations_directory)),
-    );
+      'value'       => t('The directory %translations_directory exists.', ['%translations_directory' => $translations_directory]),
+    ];
     // If the translations directory is not readable, throw an error.
     if (!$readable) {
-      $requirements['translations directory readable'] = array(
+      $requirements['translations directory readable'] = [
         'title'       => t('Translations directory'),
         'value'       => t('The translations directory is not readable.'),
         'severity'    => REQUIREMENT_ERROR,
-        'description' => t('The installer requires read permissions to %translations_directory at all times. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', array('%translations_directory' => $translations_directory, ':handbook_url' => 'https://www.drupal.org/server-permissions')),
-      );
+        'description' => t('The installer requires read permissions to %translations_directory at all times. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', ['%translations_directory' => $translations_directory, ':handbook_url' => 'https://www.drupal.org/server-permissions']),
+      ];
     }
     // If translations directory is not writable, throw an error.
     if (!$writable) {
-      $requirements['translations directory writable'] = array(
+      $requirements['translations directory writable'] = [
         'title'       => t('Translations directory'),
         'value'       => t('The translations directory is not writable.'),
         'severity'    => REQUIREMENT_ERROR,
-        'description' => t('The installer requires write permissions to %translations_directory during the installation process. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', array('%translations_directory' => $translations_directory, ':handbook_url' => 'https://www.drupal.org/server-permissions')),
-      );
+        'description' => t('The installer requires write permissions to %translations_directory during the installation process. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', ['%translations_directory' => $translations_directory, ':handbook_url' => 'https://www.drupal.org/server-permissions']),
+      ];
     }
     else {
-      $requirements['translations directory writable'] = array(
+      $requirements['translations directory writable'] = [
         'title'       => t('Translations directory'),
         'value'       => t('The translations directory is writable.'),
-      );
+      ];
     }
   }
 
   // If the translations server can not be contacted, throw an error.
   if (!$online) {
-    $requirements['online'] = array(
+    $requirements['online'] = [
       'title'       => t('Internet'),
       'value'       => t('The translation server is offline.'),
       'severity'    => REQUIREMENT_ERROR,
-      'description' => t('The installer requires to contact the translation server to download a translation file. Check your internet connection and verify that your website can reach the translation server at <a href=":server_url">@server_url</a>.', array(':server_url' => $server_url, '@server_url' => $server_url)),
-    );
+      'description' => t('The installer requires to contact the translation server to download a translation file. Check your internet connection and verify that your website can reach the translation server at <a href=":server_url">@server_url</a>.', [':server_url' => $server_url, '@server_url' => $server_url]),
+    ];
   }
   else {
-    $requirements['online'] = array(
+    $requirements['online'] = [
       'title'       => t('Internet'),
       'value'       => t('The translation server is online.'),
-    );
+    ];
     // If translation file is not found at the translation server, throw an
     // error.
     if (!$translation_available) {
-      $requirements['translation available'] = array(
+      $requirements['translation available'] = [
         'title'       => t('Translation'),
-        'value'       => t('The %language translation is not available.', array('%language' => $language)),
+        'value'       => t('The %language translation is not available.', ['%language' => $language]),
         'severity'    => REQUIREMENT_ERROR,
-        'description' => t('The %language translation file is not available at the translation server. <a href=":url">Choose a different language</a> or select English and translate your website later.', array('%language' => $language, ':url' => $_SERVER['SCRIPT_NAME'])),
-      );
+        'description' => t('The %language translation file is not available at the translation server. <a href=":url">Choose a different language</a> or select English and translate your website later.', ['%language' => $language, ':url' => $_SERVER['SCRIPT_NAME']]),
+      ];
     }
     else {
-      $requirements['translation available'] = array(
+      $requirements['translation available'] = [
         'title'       => t('Translation'),
-        'value'       => t('The %language translation is available.', array('%language' => $language)),
-      );
+        'value'       => t('The %language translation is available.', ['%language' => $language]),
+      ];
     }
   }
 
@@ -1948,12 +1948,12 @@ function install_check_translations($langcode, $server_pattern) {
     $translation_downloaded = install_retrieve_file($translation_url, $translations_directory);
 
     if (!$translation_downloaded) {
-      $requirements['translation downloaded'] = array(
+      $requirements['translation downloaded'] = [
         'title'       => t('Translation'),
-        'value'       => t('The %language translation could not be downloaded.', array('%language' => $language)),
+        'value'       => t('The %language translation could not be downloaded.', ['%language' => $language]),
         'severity'    => REQUIREMENT_ERROR,
-        'description' => t('The %language translation file could not be downloaded. <a href=":url">Choose a different language</a> or select English and translate your website later.', array('%language' => $language, ':url' => $_SERVER['SCRIPT_NAME'])),
-      );
+        'description' => t('The %language translation file could not be downloaded. <a href=":url">Choose a different language</a> or select English and translate your website later.', ['%language' => $language, ':url' => $_SERVER['SCRIPT_NAME']]),
+      ];
     }
   }
 
@@ -1975,14 +1975,14 @@ function install_check_requirements($install_state) {
 
   // If Drupal is not set up already, we need to try to create the default
   // settings and services files.
-  $default_files = array();
-  $default_files['settings.php'] = array(
+  $default_files = [];
+  $default_files['settings.php'] = [
     'file' => 'settings.php',
     'file_default' => 'default.settings.php',
     'title_default' => t('Default settings file'),
     'description_default' => t('The default settings file does not exist.'),
     'title' => t('Settings file'),
-  );
+  ];
 
   foreach ($default_files as $default_file_info) {
     $readable = FALSE;
@@ -2004,15 +2004,15 @@ function install_check_requirements($install_state) {
     // If the default $default_file does not exist, or is not readable,
     // report an error.
     if (!drupal_verify_install_file($default_file, FILE_EXIST | FILE_READABLE)) {
-      $requirements["default $file file exists"] = array(
+      $requirements["default $file file exists"] = [
         'title' => $default_file_info['title_default'],
         'value' => $default_file_info['description_default'],
         'severity' => REQUIREMENT_ERROR,
-        'description' => t('The @drupal installer requires that the %default-file file not be modified in any way from the original download.', array(
+        'description' => t('The @drupal installer requires that the %default-file file not be modified in any way from the original download.', [
             '@drupal' => drupal_install_profile_distribution_name(),
             '%default-file' => $default_file
-          )),
-      );
+          ]),
+      ];
     }
     // Otherwise, if $file does not exist yet, we can try to copy
     // $default_file to create it.
@@ -2063,68 +2063,68 @@ function install_check_requirements($install_state) {
 
     // If the $file does not exist, throw an error.
     if (!$exists) {
-      $requirements["$file file exists"] = array(
+      $requirements["$file file exists"] = [
         'title' => $default_file_info['title'],
-        'value' => t('The %file does not exist.', array('%file' => $default_file_info['title'])),
+        'value' => t('The %file does not exist.', ['%file' => $default_file_info['title']]),
         'severity' => REQUIREMENT_ERROR,
-        'description' => t('The @drupal installer requires that you create a %file as part of the installation process. Copy the %default_file file to %file. More details about installing Drupal are available in <a href=":install_txt">INSTALL.txt</a>.', array(
+        'description' => t('The @drupal installer requires that you create a %file as part of the installation process. Copy the %default_file file to %file. More details about installing Drupal are available in <a href=":install_txt">INSTALL.txt</a>.', [
             '@drupal' => drupal_install_profile_distribution_name(),
             '%file' => $file,
             '%default_file' => $default_file,
             ':install_txt' => base_path() . 'core/INSTALL.txt'
-          )),
-      );
+          ]),
+      ];
     }
     else {
-      $requirements["$file file exists"] = array(
+      $requirements["$file file exists"] = [
         'title' => $default_file_info['title'],
-        'value' => t('The %file exists.', array('%file' => $file)),
-      );
+        'value' => t('The %file exists.', ['%file' => $file]),
+      ];
       // If the $file is not readable, throw an error.
       if (!$readable) {
-        $requirements["$file file readable"] = array(
+        $requirements["$file file readable"] = [
           'title' => $default_file_info['title'],
-          'value' => t('The %file is not readable.', array('%file' => $default_file_info['title'])),
+          'value' => t('The %file is not readable.', ['%file' => $default_file_info['title']]),
           'severity' => REQUIREMENT_ERROR,
-          'description' => t('@drupal requires read permissions to %file at all times. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', array(
+          'description' => t('@drupal requires read permissions to %file at all times. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', [
               '@drupal' => drupal_install_profile_distribution_name(),
               '%file' => $file,
               ':handbook_url' => 'https://www.drupal.org/server-permissions'
-            )),
-        );
+            ]),
+        ];
       }
       // If the $file is not writable, throw an error.
       if (!$writable) {
-        $requirements["$file file writeable"] = array(
+        $requirements["$file file writeable"] = [
           'title' => $default_file_info['title'],
-          'value' => t('The %file is not writable.', array('%file' => $default_file_info['title'])),
+          'value' => t('The %file is not writable.', ['%file' => $default_file_info['title']]),
           'severity' => REQUIREMENT_ERROR,
-          'description' => t('The @drupal installer requires write permissions to %file during the installation process. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', array(
+          'description' => t('The @drupal installer requires write permissions to %file during the installation process. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', [
               '@drupal' => drupal_install_profile_distribution_name(),
               '%file' => $file,
               ':handbook_url' => 'https://www.drupal.org/server-permissions'
-            )),
-        );
+            ]),
+        ];
       }
       else {
-        $requirements["$file file"] = array(
+        $requirements["$file file"] = [
           'title' => $default_file_info['title'],
-          'value' => t('The @file is writable.', array('@file' => $default_file_info['title'])),
-        );
+          'value' => t('The @file is writable.', ['@file' => $default_file_info['title']]),
+        ];
       }
       if (!empty($settings_file_ownership_error)) {
-        $requirements["$file file ownership"] = array(
+        $requirements["$file file ownership"] = [
           'title' => $default_file_info['title'],
-          'value' => t('The @file is owned by the web server.', array('@file' => $default_file_info['title'])),
+          'value' => t('The @file is owned by the web server.', ['@file' => $default_file_info['title']]),
           'severity' => REQUIREMENT_ERROR,
-          'description' => t('The @drupal installer failed to create a %file file with proper file ownership. Log on to your web server, remove the existing %file file, and create a new one by copying the %default_file file to %file. More details about installing Drupal are available in <a href=":install_txt">INSTALL.txt</a>. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', array(
+          'description' => t('The @drupal installer failed to create a %file file with proper file ownership. Log on to your web server, remove the existing %file file, and create a new one by copying the %default_file file to %file. More details about installing Drupal are available in <a href=":install_txt">INSTALL.txt</a>. The <a href=":handbook_url">webhosting issues</a> documentation section offers help on this and other topics.', [
               '@drupal' => drupal_install_profile_distribution_name(),
               '%file' => $file,
               '%default_file' => $default_file,
               ':install_txt' => base_path() . 'core/INSTALL.txt',
               ':handbook_url' => 'https://www.drupal.org/server-permissions'
-            )),
-        );
+            ]),
+        ];
       }
     }
   }
@@ -2162,17 +2162,17 @@ function install_display_requirements($install_state, $requirements) {
       $build['report']['#requirements'] = $requirements;
       if ($severity == REQUIREMENT_WARNING) {
         $build['#title'] = t('Requirements review');
-        $build['#suffix'] = t('Check the messages and <a href=":retry">retry</a>, or you may choose to <a href=":cont">continue anyway</a>.', array(':retry' => drupal_requirements_url(REQUIREMENT_ERROR), ':cont' => drupal_requirements_url($severity)));
+        $build['#suffix'] = t('Check the messages and <a href=":retry">retry</a>, or you may choose to <a href=":cont">continue anyway</a>.', [':retry' => drupal_requirements_url(REQUIREMENT_ERROR), ':cont' => drupal_requirements_url($severity)]);
       }
       else {
         $build['#title'] = t('Requirements problem');
-        $build['#suffix'] = t('Check the messages and <a href=":url">try again</a>.', array(':url' => drupal_requirements_url($severity)));
+        $build['#suffix'] = t('Check the messages and <a href=":url">try again</a>.', [':url' => drupal_requirements_url($severity)]);
       }
       return $build;
     }
     else {
       // Throw an exception showing any unmet requirements.
-      $failures = array();
+      $failures = [];
       foreach ($requirements as $requirement) {
         // Skip warnings altogether for non-interactive installations; these
         // proceed in a single request so there is no good opportunity (and no
@@ -2207,10 +2207,10 @@ function install_write_profile($install_state) {
   $settings_path = \Drupal::service('site.path') . '/settings.php';
   if (is_writable($settings_path)) {
     // Remember the profile which was used.
-    $settings['settings']['install_profile'] = (object) array(
+    $settings['settings']['install_profile'] = (object) [
       'value' => $install_state['parameters']['profile'],
       'required' => TRUE,
-    );
+    ];
     drupal_rewrite_settings($settings);
   }
   elseif (($settings_profile = Settings::get('install_profile')) && $settings_profile !== $install_state['parameters']['profile']) {
diff --git a/core/includes/install.inc b/core/includes/install.inc
index 6bb6c11a0d15e90bbefda09281c413fae591bcd0..c5b93b58a652d69d23d8b4f4e4bb2e4e87c50297 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -96,7 +96,7 @@ function drupal_load_updates() {
 function drupal_install_profile_distribution_name() {
   // During installation, the profile information is stored in the global
   // installation state (it might not be saved anywhere yet).
-  $info = array();
+  $info = [];
   if (drupal_installation_attempted()) {
     global $install_state;
     if (isset($install_state['profile_info'])) {
@@ -158,14 +158,14 @@ function drupal_detect_database_types() {
  *   An array of available database driver installer objects.
  */
 function drupal_get_database_types() {
-  $databases = array();
-  $drivers = array();
+  $databases = [];
+  $drivers = [];
 
   // The internal database driver name is any valid PHP identifier.
   $mask = '/^' . DRUPAL_PHP_FUNCTION_PATTERN . '$/';
-  $files = file_scan_directory(DRUPAL_ROOT . '/core/lib/Drupal/Core/Database/Driver', $mask, array('recurse' => FALSE));
+  $files = file_scan_directory(DRUPAL_ROOT . '/core/lib/Drupal/Core/Database/Driver', $mask, ['recurse' => FALSE]);
   if (is_dir(DRUPAL_ROOT . '/drivers/lib/Drupal/Driver/Database')) {
-    $files += file_scan_directory(DRUPAL_ROOT . '/drivers/lib/Drupal/Driver/Database/', $mask, array('recurse' => FALSE));
+    $files += file_scan_directory(DRUPAL_ROOT . '/drivers/lib/Drupal/Driver/Database/', $mask, ['recurse' => FALSE]);
   }
   foreach ($files as $file) {
     if (file_exists($file->uri . '/Install/Tasks.php')) {
@@ -183,7 +183,7 @@ function drupal_get_database_types() {
   if (isset($databases['mysql'])) {
     $mysql_database = $databases['mysql'];
     unset($databases['mysql']);
-    $databases = array('mysql' => $mysql_database) + $databases;
+    $databases = ['mysql' => $mysql_database] + $databases;
   }
 
   return $databases;
@@ -213,13 +213,13 @@ function drupal_get_database_types() {
  *   $config_directories['sync'] = 'config_hash/sync'
  *   @endcode
  */
-function drupal_rewrite_settings($settings = array(), $settings_file = NULL) {
+function drupal_rewrite_settings($settings = [], $settings_file = NULL) {
   if (!isset($settings_file)) {
     $settings_file = \Drupal::service('site.path') . '/settings.php';
   }
   // Build list of setting names and insert the values into the global namespace.
-  $variable_names = array();
-  $settings_settings = array();
+  $variable_names = [];
+  $settings_settings = [];
   foreach ($settings as $setting => $data) {
     if ($setting != 'settings') {
       _drupal_rewrite_settings_global($GLOBALS[$setting], $data);
@@ -248,7 +248,7 @@ function drupal_rewrite_settings($settings = array(), $settings_file = NULL) {
         $value = $token;
       }
       // Do not operate on whitespace.
-      if (!in_array($type, array(T_WHITESPACE, T_COMMENT, T_DOC_COMMENT))) {
+      if (!in_array($type, [T_WHITESPACE, T_COMMENT, T_DOC_COMMENT])) {
         switch ($state) {
           case 'default':
             if ($type === T_VARIABLE && isset($variable_names[$value])) {
@@ -335,7 +335,7 @@ function drupal_rewrite_settings($settings = array(), $settings_file = NULL) {
 
     // Write the new settings file.
     if (file_put_contents($settings_file, $buffer) === FALSE) {
-      throw new Exception(t('Failed to modify %settings. Verify the file permissions.', array('%settings' => $settings_file)));
+      throw new Exception(t('Failed to modify %settings. Verify the file permissions.', ['%settings' => $settings_file]));
     }
     else {
       // In case any $settings variables were written, import them into the
@@ -352,7 +352,7 @@ function drupal_rewrite_settings($settings = array(), $settings_file = NULL) {
     }
   }
   else {
-    throw new Exception(t('Failed to open %settings. Verify the file permissions.', array('%settings' => $settings_file)));
+    throw new Exception(t('Failed to open %settings. Verify the file permissions.', ['%settings' => $settings_file]));
   }
 }
 
@@ -375,7 +375,7 @@ function _drupal_rewrite_settings_is_simple($type, $value) {
   $is_integer = $type == T_LNUMBER;
   $is_float = $type == T_DNUMBER;
   $is_string = $type == T_CONSTANT_ENCAPSED_STRING;
-  $is_boolean_or_null = $type == T_STRING && in_array(strtoupper($value), array('TRUE', 'FALSE', 'NULL'));
+  $is_boolean_or_null = $type == T_STRING && in_array(strtoupper($value), ['TRUE', 'FALSE', 'NULL']);
   return $is_integer || $is_float || $is_string || $is_boolean_or_null;
 }
 
@@ -504,10 +504,10 @@ function drupal_install_config_directories() {
   // Bail out using a similar error message as in system_requirements().
   if (!file_prepare_directory($config_directories[CONFIG_SYNC_DIRECTORY], FILE_CREATE_DIRECTORY)
     && !file_exists($config_directories[CONFIG_SYNC_DIRECTORY])) {
-    throw new Exception(t('The directory %directory could not be created. To proceed with the installation, either create the directory or ensure that the installer has the permissions to create it automatically. For more information, see the <a href=":handbook_url">online handbook</a>.', array(
+    throw new Exception(t('The directory %directory could not be created. To proceed with the installation, either create the directory or ensure that the installer has the permissions to create it automatically. For more information, see the <a href=":handbook_url">online handbook</a>.', [
       '%directory' => config_get_config_directory(CONFIG_SYNC_DIRECTORY),
       ':handbook_url' => 'https://www.drupal.org/server-permissions',
-    )));
+    ]));
   }
   elseif (is_writable($config_directories[CONFIG_SYNC_DIRECTORY])) {
     // Put a README.txt into the sync config directory. This is required so that
@@ -560,7 +560,7 @@ function drupal_verify_profile($install_state) {
 
   // Get the list of available modules for the selected installation profile.
   $listing = new ExtensionDiscovery(\Drupal::root());
-  $present_modules = array();
+  $present_modules = [];
   foreach ($listing->scan('module') as $present_module) {
     $present_modules[] = $present_module->getName();
   }
@@ -572,7 +572,7 @@ function drupal_verify_profile($install_state) {
   // Verify that all of the profile's required modules are present.
   $missing_modules = array_diff($info['dependencies'], $present_modules);
 
-  $requirements = array();
+  $requirements = [];
 
   if ($missing_modules) {
     $build = [
@@ -581,16 +581,16 @@ function drupal_verify_profile($install_state) {
     ];
 
     foreach ($missing_modules as $module) {
-      $build['#items'][] = array('#markup' => '<span class="admin-missing">' . Unicode::ucfirst($module) . '</span>');
+      $build['#items'][] = ['#markup' => '<span class="admin-missing">' . Unicode::ucfirst($module) . '</span>'];
     }
 
     $modules_list = \Drupal::service('renderer')->renderPlain($build);
-    $requirements['required_modules'] = array(
+    $requirements['required_modules'] = [
       'title' => t('Required modules'),
       'value' => t('Required modules not found.'),
       'severity' => REQUIREMENT_ERROR,
-      'description' => t('The following modules are required but were not found. Move them into the appropriate modules subdirectory, such as <em>/modules</em>. Missing modules: @modules', array('@modules' => $modules_list)),
-    );
+      'description' => t('The following modules are required but were not found. Move them into the appropriate modules subdirectory, such as <em>/modules</em>. Missing modules: @modules', ['@modules' => $modules_list]),
+    ];
   }
   return $requirements;
 }
@@ -628,7 +628,7 @@ function drupal_install_system($install_state) {
     ->save();
 
   // Install System module and rebuild the newly available routes.
-  $kernel->getContainer()->get('module_installer')->install(array('system'), FALSE);
+  $kernel->getContainer()->get('module_installer')->install(['system'], FALSE);
   \Drupal::service('router.builder')->rebuild();
 
   // Ensure default language is saved.
@@ -669,7 +669,7 @@ function drupal_verify_install_file($file, $mask = NULL, $type = 'file') {
 
   // Verify file permissions.
   if (isset($mask)) {
-    $masks = array(FILE_EXIST, FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE);
+    $masks = [FILE_EXIST, FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE];
     foreach ($masks as $current_mask) {
       if ($mask & $current_mask) {
         switch ($current_mask) {
@@ -735,7 +735,7 @@ function drupal_verify_install_file($file, $mask = NULL, $type = 'file') {
  */
 function drupal_install_mkdir($file, $mask, $message = TRUE) {
   $mod = 0;
-  $masks = array(FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE);
+  $masks = [FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE];
   foreach ($masks as $m) {
     if ($mask & $m) {
       switch ($m) {
@@ -789,7 +789,7 @@ function drupal_install_fix_file($file, $mask, $message = TRUE) {
   }
 
   $mod = fileperms($file) & 0777;
-  $masks = array(FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE);
+  $masks = [FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE];
 
   // FILE_READABLE, FILE_WRITABLE, and FILE_EXECUTABLE permission strings
   // can theoretically be 0400, 0200, and 0100 respectively, but to be safe
@@ -851,10 +851,10 @@ function drupal_install_fix_file($file, $mask, $message = TRUE) {
  */
 function install_goto($path) {
   global $base_url;
-  $headers = array(
+  $headers = [
     // Not a permanent redirect.
     'Cache-Control' => 'no-cache',
-  );
+  ];
   $response = new RedirectResponse($base_url . '/' . $path, 302, $headers);
   $response->send();
 }
@@ -886,7 +886,7 @@ function install_goto($path) {
  * @see drupal_requirements_url()
  * @see Drupal\Component\Utility\UrlHelper::filterBadProtocol()
  */
-function drupal_current_script_url($query = array()) {
+function drupal_current_script_url($query = []) {
   $uri = $_SERVER['SCRIPT_NAME'];
   $query = array_merge(UrlHelper::filterQueryParameters(\Drupal::request()->query->all()), $query);
   if (!empty($query)) {
@@ -916,7 +916,7 @@ function drupal_current_script_url($query = array()) {
  * @see \Drupal\Component\Utility\UrlHelper::filterBadProtocol()
  */
 function drupal_requirements_url($severity) {
-  $query = array();
+  $query = [];
   // If there are no errors, only warnings, append 'continue=1' to the URL so
   // the user can bypass this screen on the next page load.
   if ($severity == REQUIREMENT_WARNING) {
@@ -937,7 +937,7 @@ function drupal_requirements_url($severity) {
 function drupal_check_profile($profile) {
   $info = install_profile_info($profile);
   // Collect requirement testing results.
-  $requirements = array();
+  $requirements = [];
   // Performs an ExtensionDiscovery scan as the system module is unavailable and
   // we don't yet know where all the modules are located.
   // @todo Remove as part of https://www.drupal.org/node/2186491
@@ -1000,14 +1000,14 @@ function drupal_requirements_severity(&$requirements) {
 function drupal_check_module($module) {
   module_load_install($module);
   // Check requirements
-  $requirements = \Drupal::moduleHandler()->invoke($module, 'requirements', array('install'));
+  $requirements = \Drupal::moduleHandler()->invoke($module, 'requirements', ['install']);
   if (is_array($requirements) && drupal_requirements_severity($requirements) == REQUIREMENT_ERROR) {
     // Print any error messages
     foreach ($requirements as $requirement) {
       if (isset($requirement['severity']) && $requirement['severity'] == REQUIREMENT_ERROR) {
         $message = $requirement['description'];
         if (isset($requirement['value']) && $requirement['value']) {
-          $message = t('@requirements_message (Currently using @item version @version)', array('@requirements_message' => $requirement['description'], '@item' => $requirement['title'], '@version' => $requirement['value']));
+          $message = t('@requirements_message (Currently using @item version @version)', ['@requirements_message' => $requirement['description'], '@item' => $requirement['title'], '@version' => $requirement['value']]);
         }
         drupal_set_message($message, 'error');
       }
@@ -1066,27 +1066,27 @@ function drupal_check_module($module) {
  *   The info array.
  */
 function install_profile_info($profile, $langcode = 'en') {
-  $cache = &drupal_static(__FUNCTION__, array());
+  $cache = &drupal_static(__FUNCTION__, []);
 
   if (!isset($cache[$profile][$langcode])) {
     // Set defaults for module info.
-    $defaults = array(
-      'dependencies' => array(),
-      'themes' => array('stark'),
+    $defaults = [
+      'dependencies' => [],
+      'themes' => ['stark'],
       'description' => '',
       'version' => NULL,
       'hidden' => FALSE,
       'php' => DRUPAL_MINIMUM_PHP,
-    );
+    ];
     $profile_file = drupal_get_path('profile', $profile) . "/$profile.info.yml";
     $info = \Drupal::service('info_parser')->parse($profile_file);
     $info += $defaults;
 
     // drupal_required_modules() includes the current profile as a dependency.
     // Remove that dependency, since a module cannot depend on itself.
-    $required = array_diff(drupal_required_modules(), array($profile));
+    $required = array_diff(drupal_required_modules(), [$profile]);
 
-    $locale = !empty($langcode) && $langcode != 'en' ? array('locale') : array();
+    $locale = !empty($langcode) && $langcode != 'en' ? ['locale'] : [];
 
     $info['dependencies'] = array_unique(array_merge($required, $info['dependencies'], $locale));
 
diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 9dbbc2037daabefe43c651ba629cfd95a3b2ddf4..a75d008c8727364074563bd0a1028ca798e72d46 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -28,27 +28,27 @@
  */
 function template_preprocess_menu_local_task(&$variables) {
   $link = $variables['element']['#link'];
-  $link += array(
-    'localized_options' => array(),
-  );
+  $link += [
+    'localized_options' => [],
+  ];
   $link_text = $link['title'];
 
   if (!empty($variables['element']['#active'])) {
     $variables['is_active'] = TRUE;
 
     // Add text to indicate active tab for non-visual users.
-    $active = SafeMarkup::format('<span class="visually-hidden">@label</span>', array('@label' => t('(active tab)')));
-    $link_text = t('@local-task-title@active', array('@local-task-title' => $link_text, '@active' => $active));
+    $active = SafeMarkup::format('<span class="visually-hidden">@label</span>', ['@label' => t('(active tab)')]);
+    $link_text = t('@local-task-title@active', ['@local-task-title' => $link_text, '@active' => $active]);
   }
 
   $link['localized_options']['set_active_class'] = TRUE;
 
-  $variables['link'] = array(
+  $variables['link'] = [
     '#type' => 'link',
     '#title' => $link_text,
     '#url' => $link['url'],
     '#options' => $link['localized_options'],
-  );
+  ];
 }
 
 /**
@@ -64,32 +64,32 @@ function template_preprocess_menu_local_task(&$variables) {
  */
 function template_preprocess_menu_local_action(&$variables) {
   $link = $variables['element']['#link'];
-  $link += array(
-    'localized_options' => array(),
-  );
+  $link += [
+    'localized_options' => [],
+  ];
   $link['localized_options']['attributes']['class'][] = 'button';
   $link['localized_options']['attributes']['class'][] = 'button-action';
   $link['localized_options']['set_active_class'] = TRUE;
 
-  $variables['link'] = array(
+  $variables['link'] = [
     '#type' => 'link',
     '#title' => $link['title'],
     '#options' => $link['localized_options'],
     '#url' => $link['url'],
-  );
+  ];
 }
 
 /**
  * Returns an array containing the names of system-defined (default) menus.
  */
 function menu_list_system_menus() {
-  return array(
+  return [
     'tools' => 'Tools',
     'admin' => 'Administration',
     'account' => 'User account menu',
     'main' => 'Main navigation',
     'footer' => 'Footer menu',
-  );
+  ];
 }
 
 /**
@@ -144,12 +144,12 @@ function menu_secondary_local_tasks() {
  * Returns a renderable element for the primary and secondary tabs.
  */
 function menu_local_tabs() {
-  $build = array(
+  $build = [
     '#theme' => 'menu_local_tasks',
     '#primary' => menu_primary_local_tasks(),
     '#secondary' => menu_secondary_local_tasks(),
-  );
-  return !empty($build['#primary']) || !empty($build['#secondary']) ? $build : array();
+  ];
+  return !empty($build['#primary']) || !empty($build['#secondary']) ? $build : [];
 }
 
 /**
diff --git a/core/includes/module.inc b/core/includes/module.inc
index d80d74bb19182e7b7a21e59b89baeff7f5dada93..e3f446c66089708f3ea90687868157426784d918 100644
--- a/core/includes/module.inc
+++ b/core/includes/module.inc
@@ -27,19 +27,19 @@ function system_list($type) {
     $lists = $cached->data;
   }
   else {
-    $lists = array(
-      'theme' => array(),
-      'filepaths' => array(),
-    );
+    $lists = [
+      'theme' => [],
+      'filepaths' => [],
+    ];
     // ThemeHandler maintains the 'system.theme.data' state record.
-    $theme_data = \Drupal::state()->get('system.theme.data', array());
+    $theme_data = \Drupal::state()->get('system.theme.data', []);
     foreach ($theme_data as $name => $theme) {
       $lists['theme'][$name] = $theme;
-      $lists['filepaths'][] = array(
+      $lists['filepaths'][] = [
         'type' => 'theme',
         'name' => $name,
         'filepath' => $theme->getPathname(),
-      );
+      ];
     }
     \Drupal::cache('bootstrap')->set('system_list', $lists);
   }
@@ -146,7 +146,7 @@ function module_load_include($type, $module, $name = NULL) {
 function drupal_required_modules() {
   $listing = new ExtensionDiscovery(\Drupal::root());
   $files = $listing->scan('module');
-  $required = array();
+  $required = [];
 
   // Unless called by the installer, an installation profile is required and
   // must always be loaded. drupal_get_profile() also returns the installation
@@ -191,7 +191,7 @@ function module_set_weight($module, $weight) {
     $current_module_filenames = $module_handler->getModuleList();
     $current_modules = array_fill_keys(array_keys($current_module_filenames), 0);
     $current_modules = module_config_sort(array_merge($current_modules, $extension_config->get('module')));
-    $module_filenames = array();
+    $module_filenames = [];
     foreach ($current_modules as $name => $weight) {
       $module_filenames[$name] = $current_module_filenames[$name];
     }
@@ -222,7 +222,7 @@ function module_config_sort($data) {
   // two modules and weights (spaces added for clarity):
   // - Block with weight -5: 0 0000000000000000005 block
   // - Node  with weight  0: 1 0000000000000000000 node
-  $sort = array();
+  $sort = [];
   foreach ($data as $name => $weight) {
     // Prefix negative weights with 0, positive weights with 1.
     // +/- signs cannot be used, since + (ASCII 43) is before - (ASCII 45).
diff --git a/core/includes/pager.inc b/core/includes/pager.inc
index 6b6bbb736a7e38b8300bf44d5983a3896713d5ff..62e8278ed26202fd18a5c4ee85041c6439154cca 100644
--- a/core/includes/pager.inc
+++ b/core/includes/pager.inc
@@ -147,7 +147,7 @@ function pager_default_initialize($total, $limit, $element = 0) {
 function pager_get_query_parameters() {
   $query = &drupal_static(__FUNCTION__);
   if (!isset($query)) {
-    $query = UrlHelper::filterQueryParameters(\Drupal::request()->query->all(), array('page'));
+    $query = UrlHelper::filterQueryParameters(\Drupal::request()->query->all(), ['page']);
   }
   return $query;
 }
@@ -216,19 +216,19 @@ function template_preprocess_pager(&$variables) {
 
   // Create the "first" and "previous" links if we are not on the first page.
   if ($pager_page_array[$element] > 0) {
-    $items['first'] = array();
-    $options = array(
+    $items['first'] = [];
+    $options = [
       'query' => pager_query_add_page($parameters, $element, 0),
-    );
+    ];
     $items['first']['href'] = \Drupal::url($route_name, $route_parameters, $options);
     if (isset($tags[0])) {
       $items['first']['text'] = $tags[0];
     }
 
-    $items['previous'] = array();
-    $options = array(
+    $items['previous'] = [];
+    $options = [
       'query' => pager_query_add_page($parameters, $element, $pager_page_array[$element] - 1),
-    );
+    ];
     $items['previous']['href'] = \Drupal::url($route_name, $route_parameters, $options);
     if (isset($tags[1])) {
       $items['previous']['text'] = $tags[1];
@@ -242,9 +242,9 @@ function template_preprocess_pager(&$variables) {
     }
     // Now generate the actual pager piece.
     for (; $i <= $pager_last && $i <= $pager_max; $i++) {
-      $options = array(
+      $options = [
         'query' => pager_query_add_page($parameters, $element, $i - 1),
-      );
+      ];
       $items['pages'][$i]['href'] = \Drupal::url($route_name, $route_parameters, $options);
       if ($i == $pager_current) {
         $variables['current'] = $i;
@@ -258,19 +258,19 @@ function template_preprocess_pager(&$variables) {
 
   // Create the "next" and "last" links if we are not on the last page.
   if ($pager_page_array[$element] < ($pager_max - 1)) {
-    $items['next'] = array();
-    $options = array(
+    $items['next'] = [];
+    $options = [
       'query' => pager_query_add_page($parameters, $element, $pager_page_array[$element] + 1),
-    );
+    ];
     $items['next']['href'] = \Drupal::url($route_name, $route_parameters, $options);
     if (isset($tags[3])) {
       $items['next']['text'] = $tags[3];
     }
 
-    $items['last'] = array();
-    $options = array(
+    $items['last'] = [];
+    $options = [
       'query' => pager_query_add_page($parameters, $element, $pager_max - 1),
-    );
+    ];
     $items['last']['href'] = \Drupal::url($route_name, $route_parameters, $options);
     if (isset($tags[4])) {
       $items['last']['text'] = $tags[4];
diff --git a/core/includes/schema.inc b/core/includes/schema.inc
index aa3984b91acc65b41dff777284f786685600a81e..a2f9d23dc4f578a0591dc18de0bd96be861200ea 100644
--- a/core/includes/schema.inc
+++ b/core/includes/schema.inc
@@ -28,9 +28,9 @@
 function drupal_get_schema_versions($module) {
   $updates = &drupal_static(__FUNCTION__, NULL);
   if (!isset($updates[$module])) {
-    $updates = array();
+    $updates = [];
     foreach (\Drupal::moduleHandler()->getModuleList() as $loaded_module => $filename) {
-      $updates[$loaded_module] = array();
+      $updates[$loaded_module] = [];
     }
 
     // Prepare regular expression to match all possible defined hook_update_N().
@@ -74,15 +74,15 @@ function drupal_get_schema_versions($module) {
  *   module is not installed.
  */
 function drupal_get_installed_schema_version($module, $reset = FALSE, $array = FALSE) {
-  $versions = &drupal_static(__FUNCTION__, array());
+  $versions = &drupal_static(__FUNCTION__, []);
 
   if ($reset) {
-    $versions = array();
+    $versions = [];
   }
 
   if (!$versions) {
     if (!$versions = \Drupal::keyValue('system.schema')->getAll()) {
-      $versions = array();
+      $versions = [];
     }
   }
 
@@ -162,12 +162,12 @@ function drupal_get_module_schema($module, $table = NULL) {
     if (isset($schema[$table])) {
       return $schema[$table];
     }
-    return array();
+    return [];
   }
   elseif (!empty($schema)) {
     return $schema;
   }
-  return array();
+  return [];
 }
 
 /**
diff --git a/core/includes/tablesort.inc b/core/includes/tablesort.inc
index 95642b386925f51ba5ee3a3fcd16a7c1e1ddba88..d8f16243138b677045db9eca8102127df74b7b9f 100644
--- a/core/includes/tablesort.inc
+++ b/core/includes/tablesort.inc
@@ -41,7 +41,7 @@ function tablesort_init($header) {
 function tablesort_header(&$cell_content, array &$cell_attributes, array $header, array $ts) {
   // Special formatting for the currently sorted column header.
   if (isset($cell_attributes['field'])) {
-    $title = t('sort by @s', array('@s' => $cell_content));
+    $title = t('sort by @s', ['@s' => $cell_content]);
     if ($cell_content == $ts['name']) {
       // aria-sort is a WAI-ARIA property that indicates if items in a table
       // or grid are sorted in ascending or descending order. See
@@ -49,10 +49,10 @@ function tablesort_header(&$cell_content, array &$cell_attributes, array $header
       $cell_attributes['aria-sort'] = ($ts['sort'] == 'asc') ? 'ascending' : 'descending';
       $ts['sort'] = (($ts['sort'] == 'asc') ? 'desc' : 'asc');
       $cell_attributes['class'][] = 'is-active';
-      $tablesort_indicator = array(
+      $tablesort_indicator = [
         '#theme' => 'tablesort_indicator',
         '#style' => $ts['sort'],
-      );
+      ];
       $image = drupal_render($tablesort_indicator);
     }
     else {
@@ -60,12 +60,12 @@ function tablesort_header(&$cell_content, array &$cell_attributes, array $header
       $ts['sort'] = 'asc';
       $image = '';
     }
-    $cell_content = \Drupal::l(SafeMarkup::format('@cell_content@image', array('@cell_content' => $cell_content, '@image' => $image)), new Url('<current>', [], [
-      'attributes' => array('title' => $title),
-      'query' => array_merge($ts['query'], array(
+    $cell_content = \Drupal::l(SafeMarkup::format('@cell_content@image', ['@cell_content' => $cell_content, '@image' => $image]), new Url('<current>', [], [
+      'attributes' => ['title' => $title],
+      'query' => array_merge($ts['query'], [
         'sort' => $ts['sort'],
         'order' => $cell_content,
-      )),
+      ]),
     ]));
 
     unset($cell_attributes['field'], $cell_attributes['sort']);
@@ -80,7 +80,7 @@ function tablesort_header(&$cell_content, array &$cell_attributes, array $header
  *   page request except for those pertaining to table sorting.
  */
 function tablesort_get_query_parameters() {
-  return UrlHelper::filterQueryParameters(\Drupal::request()->query->all(), array('sort', 'order'));
+  return UrlHelper::filterQueryParameters(\Drupal::request()->query->all(), ['sort', 'order']);
 }
 
 /**
@@ -112,12 +112,12 @@ function tablesort_get_order($headers) {
   if (!isset($default)) {
     $default = reset($headers);
     if (!is_array($default)) {
-      $default = array('data' => $default);
+      $default = ['data' => $default];
     }
   }
 
-  $default += array('data' => NULL, 'field' => NULL);
-  return array('name' => $default['data'], 'sql' => $default['field']);
+  $default += ['data' => NULL, 'field' => NULL];
+  return ['name' => $default['data'], 'sql' => $default['field']];
 }
 
 /**
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 51d10a77e9296990235c5a9ff84afb2ae7cda18c..498c490beb285c3d2bd7978302c56ac35e5d8e09 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -102,13 +102,13 @@ function theme_get_registry($complete = TRUE) {
  * @see \Drupal\Core\Extension\ThemeHandler::$defaultFeatures
  */
 function _system_default_theme_features() {
-  return array(
+  return [
     'favicon',
     'logo',
     'node_user_picture',
     'comment_user_picture',
     'comment_user_verification',
-  );
+  ];
 }
 
 /**
@@ -158,11 +158,11 @@ function drupal_find_theme_functions($cache, $prefixes) {
           foreach ($matches as $match) {
             $new_hook = substr($match, strlen($prefix) + 1);
             $arg_name = isset($info['variables']) ? 'variables' : 'render element';
-            $implementations[$new_hook] = array(
+            $implementations[$new_hook] = [
               'function' => $match,
               $arg_name => $info[$arg_name],
               'base hook' => $hook,
-            );
+            ];
           }
         }
       }
@@ -170,9 +170,9 @@ function drupal_find_theme_functions($cache, $prefixes) {
       // that in what is returned so that the registry knows that the theme has
       // this implementation.
       if (function_exists($prefix . '_' . $hook)) {
-        $implementations[$hook] = array(
+        $implementations[$hook] = [
           'function' => $prefix . '_' . $hook,
-        );
+        ];
       }
     }
   }
@@ -191,12 +191,12 @@ function drupal_find_theme_functions($cache, $prefixes) {
  *   The path to search.
  */
 function drupal_find_theme_templates($cache, $extension, $path) {
-  $implementations = array();
+  $implementations = [];
 
   // Collect paths to all sub-themes grouped by base themes. These will be
   // used for filtering. This allows base themes to have sub-themes in its
   // folder hierarchy without affecting the base themes template discovery.
-  $theme_paths = array();
+  $theme_paths = [];
   foreach (\Drupal::service('theme_handler')->listInfo() as $theme_info) {
     if (!empty($theme_info->base_theme)) {
       $theme_paths[$theme_info->base_theme][$theme_info->getName()] = $theme_info->getPath();
@@ -210,12 +210,12 @@ function drupal_find_theme_templates($cache, $extension, $path) {
     }
   }
   $theme = \Drupal::theme()->getActiveTheme()->getName();
-  $subtheme_paths = isset($theme_paths[$theme]) ? $theme_paths[$theme] : array();
+  $subtheme_paths = isset($theme_paths[$theme]) ? $theme_paths[$theme] : [];
 
   // Escape the periods in the extension.
   $regex = '/' . str_replace('.', '\.', $extension) . '$/';
   // Get a listing of all template files in the path to search.
-  $files = file_scan_directory($path, $regex, array('key' => 'filename'));
+  $files = file_scan_directory($path, $regex, ['key' => 'filename']);
 
   // Find templates that implement registered theme hooks and include that in
   // what is returned so that the registry knows that the theme has this
@@ -231,21 +231,21 @@ function drupal_find_theme_templates($cache, $extension, $path) {
     // for the purposes of searching.
     $hook = strtr($template, '-', '_');
     if (isset($cache[$hook])) {
-      $implementations[$hook] = array(
+      $implementations[$hook] = [
         'template' => $template,
         'path' => dirname($file->uri),
-      );
+      ];
     }
 
     // Match templates based on the 'template' filename.
     foreach ($cache as $hook => $info) {
       if (isset($info['template'])) {
-        $template_candidates = array($info['template'], str_replace($info['theme path'] . '/templates/', '', $info['template']));
+        $template_candidates = [$info['template'], str_replace($info['theme path'] . '/templates/', '', $info['template'])];
         if (in_array($template, $template_candidates)) {
-          $implementations[$hook] = array(
+          $implementations[$hook] = [
             'template' => $template,
             'path' => dirname($file->uri),
-          );
+          ];
         }
       }
     }
@@ -272,12 +272,12 @@ function drupal_find_theme_templates($cache, $extension, $path) {
           // Put the underscores back in for the hook name and register this
           // pattern.
           $arg_name = isset($info['variables']) ? 'variables' : 'render element';
-          $implementations[strtr($file, '-', '_')] = array(
+          $implementations[strtr($file, '-', '_')] = [
             'template' => $file,
             'path' => dirname($files[$match]->uri),
             $arg_name => $info[$arg_name],
             'base hook' => $hook,
-          );
+          ];
         }
       }
     }
@@ -305,7 +305,7 @@ function drupal_find_theme_templates($cache, $extension, $path) {
  */
 function theme_get_setting($setting_name, $theme = NULL) {
   /** @var \Drupal\Core\Theme\ThemeSettings[] $cache */
-  $cache = &drupal_static(__FUNCTION__, array());
+  $cache = &drupal_static(__FUNCTION__, []);
 
   // If no key is given, use the current theme if we can determine it.
   if (!isset($theme)) {
@@ -488,7 +488,7 @@ function theme_settings_convert_to_config(array $theme_settings, Config $config)
     elseif (substr($key, 0, 7) == 'toggle_') {
       $config->set('features.' . Unicode::substr($key, 7), $value);
     }
-    elseif (!in_array($key, array('theme', 'logo_upload'))) {
+    elseif (!in_array($key, ['theme', 'logo_upload'])) {
       $config->set($key, $value);
     }
   }
@@ -545,7 +545,7 @@ function template_preprocess_time(&$variables) {
 function template_preprocess_datetime_form(&$variables) {
   $element = $variables['element'];
 
-  $variables['attributes'] = array();
+  $variables['attributes'] = [];
   if (isset($element['#id'])) {
     $variables['attributes']['id'] = $element['#id'];
   }
@@ -664,34 +664,34 @@ function template_preprocess_links(&$variables) {
     if (!empty($heading)) {
       // Convert a string heading into an array, using a <h2> tag by default.
       if (is_string($heading)) {
-        $heading = array('text' => $heading);
+        $heading = ['text' => $heading];
       }
       // Merge in default array properties into $heading.
-      $heading += array(
+      $heading += [
         'level' => 'h2',
-        'attributes' => array(),
-      );
+        'attributes' => [],
+      ];
       // Convert the attributes array into an Attribute object.
       $heading['attributes'] = new Attribute($heading['attributes']);
     }
 
-    $variables['links'] = array();
+    $variables['links'] = [];
     foreach ($links as $key => $link) {
-      $item = array();
-      $link += array(
+      $item = [];
+      $link += [
         'ajax' => NULL,
         'url' => NULL,
-      );
+      ];
 
-      $li_attributes = array();
+      $li_attributes = [];
       $keys = ['title', 'url'];
-      $link_element = array(
+      $link_element = [
         '#type' => 'link',
         '#title' => $link['title'],
         '#options' => array_diff_key($link, array_combine($keys, $keys)),
         '#url' => $link['url'],
         '#ajax' => $link['ajax'],
-      );
+      ];
 
       // Handle links and ensure that the active class is added on the LIs, but
       // only if the 'set_active_class' option is not empty.
@@ -779,7 +779,7 @@ function template_preprocess_image(&$variables) {
   // Generate a srcset attribute conforming to the spec at
   // http://www.w3.org/html/wg/drafts/html/master/embedded-content.html#attr-img-srcset
   if (!empty($variables['srcset'])) {
-    $srcset = array();
+    $srcset = [];
     foreach ($variables['srcset'] as $src) {
       // URI is mandatory.
       $source = file_url_transform_relative(file_create_url($src['uri']));
@@ -794,7 +794,7 @@ function template_preprocess_image(&$variables) {
     $variables['attributes']['srcset'] = implode(', ', $srcset);
   }
 
-  foreach (array('width', 'height', 'alt', 'title', 'sizes') as $key) {
+  foreach (['width', 'height', 'alt', 'title', 'sizes'] as $key) {
     if (isset($variables[$key])) {
       // If the property has already been defined in the attributes,
       // do not override, including NULL.
@@ -908,11 +908,11 @@ function template_preprocess_table(&$variables) {
       }
       else {
         $cols = $colgroup;
-        $colgroup_attributes = array();
+        $colgroup_attributes = [];
       }
-      $colgroup = array();
+      $colgroup = [];
       $colgroup['attributes'] = new Attribute($colgroup_attributes);
-      $colgroup['cols'] = array();
+      $colgroup['cols'] = [];
 
       // Build columns.
       if (is_array($cols) && !empty($cols)) {
@@ -924,10 +924,10 @@ function template_preprocess_table(&$variables) {
   }
 
   // Build an associative array of responsive classes keyed by column.
-  $responsive_classes = array();
+  $responsive_classes = [];
 
   // Format the table header:
-  $ts = array();
+  $ts = [];
   $header_columns = 0;
   if (!empty($variables['header'])) {
     $ts = tablesort_init($variables['header']);
@@ -979,7 +979,7 @@ function template_preprocess_table(&$variables) {
         // tablesort_header() removes the 'sort' and 'field' keys.
         $cell_attributes = new Attribute($cell);
       }
-      $variables['header'][$col_key] = array();
+      $variables['header'][$col_key] = [];
       $variables['header'][$col_key]['tag'] = $is_header ? 'th' : 'td';
       $variables['header'][$col_key]['attributes'] = $cell_attributes;
       $variables['header'][$col_key]['content'] = $cell_content;
@@ -988,12 +988,12 @@ function template_preprocess_table(&$variables) {
   $variables['header_columns'] = $header_columns;
 
   // Rows and footer have the same structure.
-  $sections = array('rows' , 'footer');
+  $sections = ['rows' , 'footer'];
   foreach ($sections as $section) {
     if (!empty($variables[$section])) {
       foreach ($variables[$section] as $row_key => $row) {
         $cells = $row;
-        $row_attributes = array();
+        $row_attributes = [];
 
         // Check if we're dealing with a simple or complex row
         if (isset($row['data'])) {
@@ -1007,9 +1007,9 @@ function template_preprocess_table(&$variables) {
         }
 
         // Build row.
-        $variables[$section][$row_key] = array();
+        $variables[$section][$row_key] = [];
         $variables[$section][$row_key]['attributes'] = new Attribute($row_attributes);
-        $variables[$section][$row_key]['cells'] = array();
+        $variables[$section][$row_key]['cells'] = [];
         if (!empty($cells)) {
           // Reset the responsive index.
           $responsive_index = -1;
@@ -1019,7 +1019,7 @@ function template_preprocess_table(&$variables) {
 
             if (!is_array($cell)) {
               $cell_content = $cell;
-              $cell_attributes = array();
+              $cell_attributes = [];
               $is_header = FALSE;
             }
             else {
@@ -1079,7 +1079,7 @@ function template_preprocess_table(&$variables) {
 function template_preprocess_item_list(&$variables) {
   $variables['wrapper_attributes'] = new Attribute($variables['wrapper_attributes']);
   foreach ($variables['items'] as &$item) {
-    $attributes = array();
+    $attributes = [];
     // If the item value is an array, then it is a render array.
     if (is_array($item)) {
       // List items support attributes via the '#wrapper_attributes' property.
@@ -1118,10 +1118,10 @@ function template_preprocess_item_list(&$variables) {
     }
 
     // Set the item's value and attributes for the template.
-    $item = array(
+    $item = [
       'value' => $item,
       'attributes' => new Attribute($attributes),
-    );
+    ];
   }
 }
 
@@ -1139,7 +1139,7 @@ function template_preprocess_container(&$variables) {
   $variables['has_parent'] = FALSE;
   $element = $variables['element'];
   // Ensure #attributes is set.
-  $element += array('#attributes' => array());
+  $element += ['#attributes' => []];
 
   // Special handling for form elements.
   if (isset($element['#array_parents'])) {
@@ -1228,16 +1228,16 @@ function template_preprocess(&$variables, $hook, $info) {
  */
 function _template_preprocess_default_variables() {
   // Variables that don't depend on a database connection.
-  $variables = array(
-    'attributes' => array(),
-    'title_attributes' => array(),
-    'content_attributes' => array(),
-    'title_prefix' => array(),
-    'title_suffix' => array(),
+  $variables = [
+    'attributes' => [],
+    'title_attributes' => [],
+    'content_attributes' => [],
+    'title_prefix' => [],
+    'title_suffix' => [],
     'db_is_active' => !defined('MAINTENANCE_MODE'),
     'is_admin' => FALSE,
     'logged_in' => FALSE,
-  );
+  ];
 
   // Give modules a chance to alter the default template variables.
   \Drupal::moduleHandler()->alter('template_preprocess_default_variables', $variables);
@@ -1302,19 +1302,19 @@ function template_preprocess_html(&$variables) {
     $variables['page']['#title'] = (string) \Drupal::service('renderer')->render($variables['page']['#title']);
   }
   if (!empty($variables['page']['#title'])) {
-    $head_title = array(
+    $head_title = [
       // Marking the title as safe since it has had the tags stripped.
       'title' => Markup::create(trim(strip_tags($variables['page']['#title']))),
       'name' => $site_config->get('name'),
-    );
+    ];
   }
   // @todo Remove once views is not bypassing the view subscriber anymore.
   //   @see https://www.drupal.org/node/2068471
   elseif ($is_front_page) {
-    $head_title = array(
+    $head_title = [
       'title' => t('Home'),
       'name' => $site_config->get('name'),
-    );
+    ];
   }
   else {
     $head_title = ['name' => $site_config->get('name')];
@@ -1354,7 +1354,7 @@ function template_preprocess_page(&$variables) {
 
   foreach (\Drupal::theme()->getActiveTheme()->getRegions() as $region) {
     if (!isset($variables['page'][$region])) {
-      $variables['page'][$region] = array();
+      $variables['page'][$region] = [];
     }
   }
 
@@ -1414,7 +1414,7 @@ function theme_get_suggestions($args, $base, $delimiter = '__') {
   // page__node__1
   // page__node__edit
 
-  $suggestions = array();
+  $suggestions = [];
   $prefix = $base;
   foreach ($args as $arg) {
     // Remove slashes or null per SA-CORE-2009-003 and change - (hyphen) to _
@@ -1429,7 +1429,7 @@ function theme_get_suggestions($args, $base, $delimiter = '__') {
     // converted to underscores so here we must convert any hyphens in path
     // arguments to underscores here before fetching theme hook suggestions
     // to ensure the templates are appropriately recognized.
-    $arg = str_replace(array("/", "\\", "\0", '-'), array('', '', '', '_'), $arg);
+    $arg = str_replace(["/", "\\", "\0", '-'], ['', '', '', '_'], $arg);
     // The percent acts as a wildcard for numeric arguments since
     // asterisks are not valid filename characters on many filesystems.
     if (is_numeric($arg)) {
@@ -1562,7 +1562,7 @@ function template_preprocess_field(&$variables, $hook) {
   // on those keys is faster than calling Element::children() or looping on all
   // keys within $element, since that requires traversal of all element
   // properties.
-  $variables['items'] = array();
+  $variables['items'] = [];
   $delta = 0;
   while (!empty($element[$delta])) {
     $variables['items'][$delta]['content'] = $element[$delta];
@@ -1597,29 +1597,29 @@ function template_preprocess_field_multiple_value_form(&$variables) {
   if ($variables['multiple']) {
     $table_id = Html::getUniqueId($element['#field_name'] . '_values');
     $order_class = $element['#field_name'] . '-delta-order';
-    $header_attributes = new Attribute(array('class' => array('label')));
+    $header_attributes = new Attribute(['class' => ['label']]);
     if (!empty($element['#required'])) {
       $header_attributes['class'][] = 'js-form-required';
       $header_attributes['class'][] = 'form-required';
     }
-    $header = array(
-      array(
-        'data' => array(
+    $header = [
+      [
+        'data' => [
           '#prefix' => '<h4' . $header_attributes . '>',
           '#markup' => $element['#title'],
           '#suffix' => '</h4>',
-        ),
+        ],
         'colspan' => 2,
-        'class' => array('field-label'),
-      ),
-      t('Order', array(), array('context' => 'Sort order')),
-    );
-    $rows = array();
+        'class' => ['field-label'],
+      ],
+      t('Order', [], ['context' => 'Sort order']),
+    ];
+    $rows = [];
 
     // Sort items according to '_weight' (needed when the form comes back after
     // preview or failed validation).
-    $items = array();
-    $variables['button'] = array();
+    $items = [];
+    $variables['button'] = [];
     foreach (Element::children($element) as $key) {
       if ($key === 'add_more') {
         $variables['button'] = &$element[$key];
@@ -1632,40 +1632,40 @@ function template_preprocess_field_multiple_value_form(&$variables) {
 
     // Add the items as table rows.
     foreach ($items as $item) {
-      $item['_weight']['#attributes']['class'] = array($order_class);
+      $item['_weight']['#attributes']['class'] = [$order_class];
 
       // Remove weight form element from item render array so it can be rendered
       // in a separate table column.
       $delta_element = $item['_weight'];
       unset($item['_weight']);
 
-      $cells = array(
-        array('data' => '', 'class' => array('field-multiple-drag')),
-        array('data' => $item),
-        array('data' => $delta_element, 'class' => array('delta-order')),
-      );
-      $rows[] = array(
+      $cells = [
+        ['data' => '', 'class' => ['field-multiple-drag']],
+        ['data' => $item],
+        ['data' => $delta_element, 'class' => ['delta-order']],
+      ];
+      $rows[] = [
         'data' => $cells,
-        'class' => array('draggable'),
-      );
+        'class' => ['draggable'],
+      ];
     }
 
-    $variables['table'] = array(
+    $variables['table'] = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
-      '#attributes' => array(
+      '#attributes' => [
         'id' => $table_id,
-        'class' => array('field-multiple-table'),
-      ),
-      '#tabledrag' => array(
-        array(
+        'class' => ['field-multiple-table'],
+      ],
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => $order_class,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     if (!empty($element['#description'])) {
       $description_id = $element['#attributes']['aria-describedby'];
@@ -1678,7 +1678,7 @@ function template_preprocess_field_multiple_value_form(&$variables) {
     }
   }
   else {
-    $variables['elements'] = array();
+    $variables['elements'] = [];
     foreach (Element::children($element) as $key) {
       $variables['elements'][] = $element[$key];
     }
@@ -1695,10 +1695,10 @@ function template_preprocess_field_multiple_value_form(&$variables) {
  *   - links: A list of \Drupal\Core\Link objects which should be rendered.
  */
 function template_preprocess_breadcrumb(&$variables) {
-  $variables['breadcrumb'] = array();
+  $variables['breadcrumb'] = [];
   /** @var \Drupal\Core\Link $link */
   foreach ($variables['links'] as $key => $link) {
-    $variables['breadcrumb'][$key] = array('text' => $link->getText(), 'url' => $link->getUrl()->toString());
+    $variables['breadcrumb'][$key] = ['text' => $link->getText(), 'url' => $link->getUrl()->toString()];
   }
 }
 
@@ -1717,39 +1717,39 @@ function _field_multiple_value_form_sort_helper($a, $b) {
  * Provides theme registration for themes across .inc files.
  */
 function drupal_common_theme() {
-  return array(
+  return [
     // From theme.inc.
-    'html' => array(
+    'html' => [
       'render element' => 'html',
-    ),
-    'page' => array(
+    ],
+    'page' => [
       'render element' => 'page',
-    ),
-    'page_title' => array(
-      'variables' => array('title' => NULL),
-    ),
-    'region' => array(
+    ],
+    'page_title' => [
+      'variables' => ['title' => NULL],
+    ],
+    'region' => [
       'render element' => 'elements',
-    ),
-    'time' => array(
-      'variables' => array('timestamp' => NULL, 'text' => NULL, 'attributes' => array()),
-    ),
-    'datetime_form' => array(
+    ],
+    'time' => [
+      'variables' => ['timestamp' => NULL, 'text' => NULL, 'attributes' => []],
+    ],
+    'datetime_form' => [
       'render element' => 'element',
-    ),
-    'datetime_wrapper' => array(
+    ],
+    'datetime_wrapper' => [
       'render element' => 'element',
-    ),
-    'status_messages' => array(
+    ],
+    'status_messages' => [
       'variables' => ['status_headings' => [], 'message_list' => NULL],
-    ),
-    'links' => array(
-      'variables' => array('links' => array(), 'attributes' => array('class' => array('links')), 'heading' => array(), 'set_active_class' => FALSE),
-    ),
-    'dropbutton_wrapper' => array(
-      'variables' => array('children' => NULL),
-    ),
-    'image' => array(
+    ],
+    'links' => [
+      'variables' => ['links' => [], 'attributes' => ['class' => ['links']], 'heading' => [], 'set_active_class' => FALSE],
+    ],
+    'dropbutton_wrapper' => [
+      'variables' => ['children' => NULL],
+    ],
+    'image' => [
       // HTML 4 and XHTML 1.0 always require an alt attribute. The HTML 5 draft
       // allows the alt attribute to be omitted in some cases. Therefore,
       // default the alt attribute to an empty string, but allow code providing
@@ -1763,107 +1763,107 @@ function drupal_common_theme() {
       // - http://dev.w3.org/html5/spec/Overview.html#alt
       // The title attribute is optional in all cases, so it is omitted by
       // default.
-      'variables' => array('uri' => NULL, 'width' => NULL, 'height' => NULL, 'alt' => '', 'title' => NULL, 'attributes' => array(), 'sizes' => NULL, 'srcset' => array(), 'style_name' => NULL),
-    ),
-    'breadcrumb' => array(
-      'variables' => array('links' => array()),
-    ),
-    'table' => array(
-      'variables' => array('header' => NULL, 'rows' => NULL, 'footer' => NULL, 'attributes' => array(), 'caption' => NULL, 'colgroups' => array(), 'sticky' => FALSE, 'responsive' => TRUE, 'empty' => ''),
-    ),
-    'tablesort_indicator' => array(
-      'variables' => array('style' => NULL),
-    ),
-    'mark' => array(
-      'variables' => array('status' => MARK_NEW),
-    ),
-    'item_list' => array(
-      'variables' => array('items' => array(), 'title' => '', 'list_type' => 'ul', 'wrapper_attributes' => array(), 'attributes' => array(), 'empty' => NULL, 'context' => array()),
-    ),
-    'feed_icon' => array(
-      'variables' => array('url' => NULL, 'title' => NULL),
-    ),
-    'progress_bar' => array(
-      'variables' => array('label' => NULL, 'percent' => NULL, 'message' => NULL),
-    ),
-    'indentation' => array(
-      'variables' => array('size' => 1),
-    ),
+      'variables' => ['uri' => NULL, 'width' => NULL, 'height' => NULL, 'alt' => '', 'title' => NULL, 'attributes' => [], 'sizes' => NULL, 'srcset' => [], 'style_name' => NULL],
+    ],
+    'breadcrumb' => [
+      'variables' => ['links' => []],
+    ],
+    'table' => [
+      'variables' => ['header' => NULL, 'rows' => NULL, 'footer' => NULL, 'attributes' => [], 'caption' => NULL, 'colgroups' => [], 'sticky' => FALSE, 'responsive' => TRUE, 'empty' => ''],
+    ],
+    'tablesort_indicator' => [
+      'variables' => ['style' => NULL],
+    ],
+    'mark' => [
+      'variables' => ['status' => MARK_NEW],
+    ],
+    'item_list' => [
+      'variables' => ['items' => [], 'title' => '', 'list_type' => 'ul', 'wrapper_attributes' => [], 'attributes' => [], 'empty' => NULL, 'context' => []],
+    ],
+    'feed_icon' => [
+      'variables' => ['url' => NULL, 'title' => NULL],
+    ],
+    'progress_bar' => [
+      'variables' => ['label' => NULL, 'percent' => NULL, 'message' => NULL],
+    ],
+    'indentation' => [
+      'variables' => ['size' => 1],
+    ],
     // From theme.maintenance.inc.
-    'maintenance_page' => array(
+    'maintenance_page' => [
       'render element' => 'page',
-    ),
-    'install_page' => array(
+    ],
+    'install_page' => [
       'render element' => 'page',
-    ),
-    'maintenance_task_list' => array(
-      'variables' => array('items' => NULL, 'active' => NULL, 'variant' => NULL),
-    ),
-    'authorize_report' => array(
+    ],
+    'maintenance_task_list' => [
+      'variables' => ['items' => NULL, 'active' => NULL, 'variant' => NULL],
+    ],
+    'authorize_report' => [
       'variables' => ['messages' => [], 'attributes' => []],
       'includes' => ['core/includes/theme.maintenance.inc'],
       'template' => 'authorize-report',
-    ),
+    ],
     // From pager.inc.
-    'pager' => array(
+    'pager' => [
       'render element' => 'pager',
-    ),
+    ],
     // From menu.inc.
-    'menu' => array(
-      'variables' => array('menu_name' => NULL, 'items' => array(), 'attributes' => array()),
-    ),
-    'menu_local_task' => array(
+    'menu' => [
+      'variables' => ['menu_name' => NULL, 'items' => [], 'attributes' => []],
+    ],
+    'menu_local_task' => [
       'render element' => 'element',
-    ),
-    'menu_local_action' => array(
+    ],
+    'menu_local_action' => [
       'render element' => 'element',
-    ),
-    'menu_local_tasks' => array(
-      'variables' => array('primary' => array(), 'secondary' => array()),
-    ),
+    ],
+    'menu_local_tasks' => [
+      'variables' => ['primary' => [], 'secondary' => []],
+    ],
     // From form.inc.
-    'input' => array(
+    'input' => [
       'render element' => 'element',
-    ),
-    'select' => array(
+    ],
+    'select' => [
       'render element' => 'element',
-    ),
-    'fieldset' => array(
+    ],
+    'fieldset' => [
       'render element' => 'element',
-    ),
-    'details' => array(
+    ],
+    'details' => [
       'render element' => 'element',
-    ),
-    'radios' => array(
+    ],
+    'radios' => [
       'render element' => 'element',
-    ),
-    'checkboxes' => array(
+    ],
+    'checkboxes' => [
       'render element' => 'element',
-    ),
-    'form' => array(
+    ],
+    'form' => [
       'render element' => 'element',
-    ),
-    'textarea' => array(
+    ],
+    'textarea' => [
       'render element' => 'element',
-    ),
-    'form_element' => array(
+    ],
+    'form_element' => [
       'render element' => 'element',
-    ),
-    'form_element_label' => array(
+    ],
+    'form_element_label' => [
       'render element' => 'element',
-    ),
-    'vertical_tabs' => array(
+    ],
+    'vertical_tabs' => [
       'render element' => 'element',
-    ),
-    'container' => array(
+    ],
+    'container' => [
       'render element' => 'element',
-    ),
+    ],
     // From field system.
-    'field' => array(
+    'field' => [
       'render element' => 'element',
-    ),
-    'field_multiple_value_form' => array(
+    ],
+    'field_multiple_value_form' => [
       'render element' => 'element',
-    ),
-  );
+    ],
+  ];
 }
diff --git a/core/includes/unicode.inc b/core/includes/unicode.inc
index b09ddb765fefd78a93e3b946ba45cf9b2446dbed..f6b3ee70dcec188e008310eee34dce45f291f219 100644
--- a/core/includes/unicode.inc
+++ b/core/includes/unicode.inc
@@ -11,24 +11,24 @@
  * Returns Unicode library status and errors.
  */
 function unicode_requirements() {
-  $libraries = array(
+  $libraries = [
     Unicode::STATUS_SINGLEBYTE => t('Standard PHP'),
     Unicode::STATUS_MULTIBYTE => t('PHP Mbstring Extension'),
     Unicode::STATUS_ERROR => t('Error'),
-  );
-  $severities = array(
+  ];
+  $severities = [
     Unicode::STATUS_SINGLEBYTE => REQUIREMENT_WARNING,
     Unicode::STATUS_MULTIBYTE => NULL,
     Unicode::STATUS_ERROR => REQUIREMENT_ERROR,
-  );
+  ];
   $failed_check = Unicode::check();
   $library = Unicode::getStatus();
 
-  $requirements['unicode'] = array(
+  $requirements['unicode'] = [
     'title' => t('Unicode library'),
     'value' => $libraries[$library],
     'severity' => $severities[$library],
-  );
+  ];
   switch ($failed_check) {
     case 'mb_strlen':
       $requirements['unicode']['description'] = t('Operations on Unicode strings are emulated on a best-effort basis. Install the <a href="http://php.net/mbstring">PHP mbstring extension</a> for improved Unicode support.');
@@ -97,7 +97,7 @@ function drupal_xml_parser_create(&$data) {
   }
 
   // Unsupported encodings are converted here into UTF-8.
-  $php_supported = array('utf-8', 'iso-8859-1', 'us-ascii');
+  $php_supported = ['utf-8', 'iso-8859-1', 'us-ascii'];
   if (!in_array(strtolower($encoding), $php_supported)) {
     $out = Unicode::convertToUtf8($data, $encoding);
     if ($out !== FALSE) {
@@ -105,7 +105,7 @@ function drupal_xml_parser_create(&$data) {
       $data = preg_replace('/^(<\?xml[^>]+encoding)="(.+?)"/', '\\1="utf-8"', $out);
     }
     else {
-      \Drupal::logger('php')->warning('Could not convert XML encoding %s to UTF-8.', array('%s' => $encoding));
+      \Drupal::logger('php')->warning('Could not convert XML encoding %s to UTF-8.', ['%s' => $encoding]);
       return FALSE;
     }
   }
diff --git a/core/includes/update.inc b/core/includes/update.inc
index a9b5de92320d869b8bc4b227cb5390fba520596e..6e0707f7a0c90421cc0b03baa5aff773c1b13ff3 100644
--- a/core/includes/update.inc
+++ b/core/includes/update.inc
@@ -17,7 +17,7 @@
 function update_fix_compatibility() {
   $extension_config = \Drupal::configFactory()->getEditable('core.extension');
   $save = FALSE;
-  foreach (array('module', 'theme') as $type) {
+  foreach (['module', 'theme'] as $type) {
     foreach ($extension_config->get($type) as $name => $weight) {
       if (update_check_incompatibility($name, $type)) {
         $extension_config->clear("$type.$name");
@@ -68,23 +68,23 @@ function update_check_incompatibility($name, $type = 'module') {
  *   A requirements info array.
  */
 function update_system_schema_requirements() {
-  $requirements = array();
+  $requirements = [];
 
   $system_schema = drupal_get_installed_schema_version('system');
 
   $requirements['minimum schema']['title'] = 'Minimum schema version';
   if ($system_schema >= \Drupal::CORE_MINIMUM_SCHEMA_VERSION) {
-    $requirements['minimum schema'] += array(
+    $requirements['minimum schema'] += [
       'value' => 'The installed schema version meets the minimum.',
       'description' => 'Schema version: ' . $system_schema,
-    );
+    ];
   }
   else {
-    $requirements['minimum schema'] += array(
+    $requirements['minimum schema'] += [
       'value' => 'The installed schema version does not meet the minimum.',
       'severity' => REQUIREMENT_ERROR,
       'description' => 'Your system schema version is ' . $system_schema . '. Updating directly from a schema version prior to 8000 is not supported. You must <a href="https://www.drupal.org/node/2179269">migrate your site to Drupal 8</a> first.',
-    );
+    ];
   }
 
   return $requirements;
@@ -95,7 +95,7 @@ function update_system_schema_requirements() {
  */
 function update_check_requirements() {
   // Check requirements of all loaded modules.
-  $requirements = \Drupal::moduleHandler()->invokeAll('requirements', array('update'));
+  $requirements = \Drupal::moduleHandler()->invokeAll('requirements', ['update']);
   $requirements += update_system_schema_requirements();
   return $requirements;
 }
@@ -168,11 +168,11 @@ function update_do_one($module, $number, $dependency_map, &$context) {
 
   // If this update was aborted in a previous step, or has a dependency that
   // was aborted in a previous step, go no further.
-  if (!empty($context['results']['#abort']) && array_intersect($context['results']['#abort'], array_merge($dependency_map, array($function)))) {
+  if (!empty($context['results']['#abort']) && array_intersect($context['results']['#abort'], array_merge($dependency_map, [$function]))) {
     return;
   }
 
-  $ret = array();
+  $ret = [];
   if (function_exists($function)) {
     try {
       $ret['results']['query'] = $function($context['sandbox']);
@@ -187,7 +187,7 @@ function update_do_one($module, $number, $dependency_map, &$context) {
 
       $variables = Error::decodeException($e);
       unset($variables['backtrace']);
-      $ret['#abort'] = array('success' => FALSE, 'query' => t('%type: @message in %function (line %line of %file).', $variables));
+      $ret['#abort'] = ['success' => FALSE, 'query' => t('%type: @message in %function (line %line of %file).', $variables)];
     }
   }
 
@@ -197,10 +197,10 @@ function update_do_one($module, $number, $dependency_map, &$context) {
   }
 
   if (!isset($context['results'][$module])) {
-    $context['results'][$module] = array();
+    $context['results'][$module] = [];
   }
   if (!isset($context['results'][$module][$number])) {
-    $context['results'][$module][$number] = array();
+    $context['results'][$module][$number] = [];
   }
   $context['results'][$module][$number] = array_merge($context['results'][$module][$number], $ret);
 
@@ -266,7 +266,7 @@ function update_invoke_post_update($function, &$context) {
     unset($context['sandbox']['#finished']);
   }
   if (!isset($context['results'][$module][$name])) {
-    $context['results'][$module][$name] = array();
+    $context['results'][$module][$name] = [];
   }
   $context['results'][$module][$name] = array_merge($context['results'][$module][$name], $ret);
 
@@ -298,7 +298,7 @@ function update_invoke_post_update($function, &$context) {
  */
 function update_get_update_list() {
   // Make sure that the system module is first in the list of updates.
-  $ret = array('system' => array());
+  $ret = ['system' => []];
 
   $modules = drupal_get_installed_schema_version(NULL, FALSE, TRUE);
   foreach ($modules as $module => $schema_version) {
@@ -332,7 +332,7 @@ function update_get_update_list() {
         if ($update > $schema_version) {
           // The description for an update comes from its Doxygen.
           $func = new ReflectionFunction($module . '_update_' . $update);
-          $description = str_replace(array("\n", '*', '/'), '', $func->getDocComment());
+          $description = str_replace(["\n", '*', '/'], '', $func->getDocComment());
           $ret[$module]['pending'][$update] = "$update - $description";
           if (!isset($ret[$module]['start'])) {
             $ret[$module]['start'] = $update;
@@ -400,7 +400,7 @@ function update_resolve_dependencies($starting_updates) {
   // Perform the depth-first search and sort on the results.
   $graph_object = new Graph($graph);
   $graph = $graph_object->searchAndSort();
-  uasort($graph, array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
+  uasort($graph, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
 
   foreach ($graph as $function => &$data) {
     $module = $data['module'];
@@ -416,7 +416,7 @@ function update_resolve_dependencies($starting_updates) {
     }
     elseif (!isset($data['allowed'])) {
       $data['allowed'] = TRUE;
-      $data['missing_dependencies'] = array();
+      $data['missing_dependencies'] = [];
     }
     // Now that we have finished processing this function, remove it from the
     // graph if it was not part of the original list. This ensures that we
@@ -448,9 +448,9 @@ function update_resolve_dependencies($starting_updates) {
 function update_get_update_function_list($starting_updates) {
   // Go through each module and find all updates that we need (including the
   // first update that was requested and any updates that run after it).
-  $update_functions = array();
+  $update_functions = [];
   foreach ($starting_updates as $module => $version) {
-    $update_functions[$module] = array();
+    $update_functions[$module] = [];
     $updates = drupal_get_schema_versions($module);
     if ($updates !== FALSE) {
       $max_version = max($updates);
@@ -512,7 +512,7 @@ function update_get_update_function_list($starting_updates) {
 function update_build_dependency_graph($update_functions) {
   // Initialize an array that will define a directed graph representing the
   // dependencies between update functions.
-  $graph = array();
+  $graph = [];
 
   // Go through each update function and build an initial list of dependencies.
   foreach ($update_functions as $module => $functions) {
@@ -600,7 +600,7 @@ function update_already_performed($module, $number) {
  * @see hook_update_dependencies()
  */
 function update_retrieve_dependencies() {
-  $return = array();
+  $return = [];
   // Get a list of installed modules, arranged so that we invoke their hooks in
   // the same order that \Drupal::moduleHandler()->invokeAll() does.
   foreach (\Drupal::keyValue('system.schema')->getAll() as $module => $schema) {
@@ -675,7 +675,7 @@ function update_replace_permissions($replace) {
   foreach ($role_names as $role_name) {
     $rid = substr($role_name, $cut);
     $config = \Drupal::config("user.role.$rid");
-    $permissions = $config->get('permissions') ?: array();
+    $permissions = $config->get('permissions') ?: [];
     foreach ($replace as $old_permission => $new_permissions) {
       if (($index = array_search($old_permission, $permissions)) !== FALSE) {
         unset($permissions[$index]);
@@ -707,7 +707,7 @@ function update_language_list($flags = LanguageInterface::STATE_CONFIGURABLE) {
   // Initialize master language list.
   if (!isset($languages)) {
     // Initialize local language list cache.
-    $languages = array();
+    $languages = [];
 
     // Fill in master language list based on current configuration.
     $default = \Drupal::languageManager()->getDefaultLanguage();
@@ -721,20 +721,20 @@ function update_language_list($flags = LanguageInterface::STATE_CONFIGURABLE) {
       foreach ($language_entities as $langcode_config_name) {
         $langcode = substr($langcode_config_name, strlen('language.entity.'));
         $info = \Drupal::config($langcode_config_name)->get();
-        $languages[$langcode] = new Language(array(
+        $languages[$langcode] = new Language([
           'default' => ($info['id'] == $default->getId()),
           'name' => $info['label'],
           'id' => $info['id'],
           'direction' => $info['direction'],
           'locked' => $info['locked'],
           'weight' => $info['weight'],
-        ));
+        ]);
       }
       Language::sort($languages);
     }
     else {
       // No language module, so use the default language only.
-      $languages = array($default->getId() => $default);
+      $languages = [$default->getId() => $default];
       // Add the special languages, they will be filtered later if needed.
       $languages += \Drupal::languageManager()->getDefaultLockedLanguages($default->getWeight());
     }
@@ -743,13 +743,13 @@ function update_language_list($flags = LanguageInterface::STATE_CONFIGURABLE) {
   // Filter the full list of languages based on the value of the $all flag. By
   // default we remove the locked languages, but the caller may request for
   // those languages to be added as well.
-  $filtered_languages = array();
+  $filtered_languages = [];
 
   // Add the site's default language if flagged as allowed value.
   if ($flags & LanguageInterface::STATE_SITE_DEFAULT) {
     $default = \Drupal::languageManager()->getDefaultLanguage();
     // Rename the default language.
-    $default->setName(t("Site's default language (@lang_name)", array('@lang_name' => $default->getName())));
+    $default->setName(t("Site's default language (@lang_name)", ['@lang_name' => $default->getName()]));
     $filtered_languages[LanguageInterface::LANGCODE_SITE_DEFAULT] = $default;
   }
 
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index de2229755ced7c2c2919beb5d2b2d934fc818337..1acfc12e9a6bb277f812312e0cbb02967cec36dc 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -566,7 +566,7 @@ public static function urlGenerator() {
    *   Instead create a \Drupal\Core\Url object directly, for example using
    *   Url::fromRoute().
    */
-  public static function url($route_name, $route_parameters = array(), $options = array(), $collect_bubbleable_metadata = FALSE) {
+  public static function url($route_name, $route_parameters = [], $options = [], $collect_bubbleable_metadata = FALSE) {
     return static::getContainer()->get('url_generator')->generateFromRoute($route_name, $route_parameters, $options, $collect_bubbleable_metadata);
   }
 
diff --git a/core/lib/Drupal/Component/Annotation/Plugin.php b/core/lib/Drupal/Component/Annotation/Plugin.php
index 29f36759c3d0005c60a50aff5d4465e51f4e6409..790440d1129287dcdcdd1f615bd874f93dedb480 100644
--- a/core/lib/Drupal/Component/Annotation/Plugin.php
+++ b/core/lib/Drupal/Component/Annotation/Plugin.php
@@ -52,7 +52,7 @@ public function __construct($values) {
    *   The parsed annotation as a definition.
    */
   protected function parse(array $values) {
-    $definitions = array();
+    $definitions = [];
     foreach ($values as $key => $value) {
       if ($value instanceof AnnotationInterface) {
         $definitions[$key] = $value->get();
diff --git a/core/lib/Drupal/Component/Annotation/Plugin/Discovery/AnnotatedClassDiscovery.php b/core/lib/Drupal/Component/Annotation/Plugin/Discovery/AnnotatedClassDiscovery.php
index 879f13b3c360ea8539b17eefeb9f167a9cfd32c5..b350ac02293e63e03deb6b40aa702b2f460ab4d8 100644
--- a/core/lib/Drupal/Component/Annotation/Plugin/Discovery/AnnotatedClassDiscovery.php
+++ b/core/lib/Drupal/Component/Annotation/Plugin/Discovery/AnnotatedClassDiscovery.php
@@ -69,7 +69,7 @@ class AnnotatedClassDiscovery implements DiscoveryInterface {
    * @param string[] $annotation_namespaces
    *   (optional) Additional namespaces to be scanned for annotation classes.
    */
-  function __construct($plugin_namespaces = array(), $plugin_definition_annotation_name = 'Drupal\Component\Annotation\Plugin', array $annotation_namespaces = []) {
+  function __construct($plugin_namespaces = [], $plugin_definition_annotation_name = 'Drupal\Component\Annotation\Plugin', array $annotation_namespaces = []) {
     $this->pluginNamespaces = $plugin_namespaces;
     $this->pluginDefinitionAnnotationName = $plugin_definition_annotation_name;
     $this->annotationNamespaces = $annotation_namespaces;
@@ -105,7 +105,7 @@ protected function getAnnotationReader() {
    * {@inheritdoc}
    */
   public function getDefinitions() {
-    $definitions = array();
+    $definitions = [];
 
     $reader = $this->getAnnotationReader();
 
diff --git a/core/lib/Drupal/Component/Annotation/PluginID.php b/core/lib/Drupal/Component/Annotation/PluginID.php
index 6120d19f6395506af21e3f21b51b05f6a7dbe419..462ebd4138f4a5dd926c0fc93d4faea8a0f60315 100644
--- a/core/lib/Drupal/Component/Annotation/PluginID.php
+++ b/core/lib/Drupal/Component/Annotation/PluginID.php
@@ -22,11 +22,11 @@ class PluginID extends AnnotationBase {
    * {@inheritdoc}
    */
   public function get() {
-    return array(
+    return [
       'id' => $this->value,
       'class' => $this->class,
       'provider' => $this->provider,
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Component/Bridge/ZfExtensionManagerSfContainer.php b/core/lib/Drupal/Component/Bridge/ZfExtensionManagerSfContainer.php
index 3d8f77b176fe800c90451e9d8c06ea699dc937b7..f914b698c8b5034448e3d43da2e3c5dad77e15d4 100644
--- a/core/lib/Drupal/Component/Bridge/ZfExtensionManagerSfContainer.php
+++ b/core/lib/Drupal/Component/Bridge/ZfExtensionManagerSfContainer.php
@@ -25,7 +25,7 @@ class ZfExtensionManagerSfContainer implements ReaderManagerInterface, WriterMan
    *
    * @see \Drupal\Component\Bridge\ZfExtensionManagerSfContainer::canonicalizeName().
    */
-  protected $canonicalNamesReplacements = array('-' => '', '_' => '', ' ' => '', '\\' => '', '/' => '');
+  protected $canonicalNamesReplacements = ['-' => '', '_' => '', ' ' => '', '\\' => '', '/' => ''];
 
   /**
    * The prefix to be used when retrieving plugins from the container.
diff --git a/core/lib/Drupal/Component/Datetime/DateTimePlus.php b/core/lib/Drupal/Component/Datetime/DateTimePlus.php
index 3f59b59e570b420c1916bee3c69dd1e4854a3c1e..d3cb15ec7c2d9b45030998c4a41ead05e27b9e0e 100644
--- a/core/lib/Drupal/Component/Datetime/DateTimePlus.php
+++ b/core/lib/Drupal/Component/Datetime/DateTimePlus.php
@@ -41,14 +41,14 @@ class DateTimePlus {
   /**
    * An array of possible date parts.
    */
-  protected static $dateParts = array(
+  protected static $dateParts = [
     'year',
     'month',
     'day',
     'hour',
     'minute',
     'second',
-  );
+  ];
 
   /**
    * The value of the time value passed to the constructor.
@@ -88,7 +88,7 @@ class DateTimePlus {
   /**
    * An array of errors encountered when creating this date.
    */
-  protected $errors = array();
+  protected $errors = [];
 
   /**
    * The DateTime object.
@@ -108,7 +108,7 @@ class DateTimePlus {
    * @return static
    *   A new DateTimePlus object.
    */
-  public static function createFromDateTime(\DateTime $datetime, $settings = array()) {
+  public static function createFromDateTime(\DateTime $datetime, $settings = []) {
     return new static($datetime->format(static::FORMAT), $datetime->getTimezone(), $settings);
   }
 
@@ -133,7 +133,7 @@ public static function createFromDateTime(\DateTime $datetime, $settings = array
    * @throws \InvalidArgumentException
    *   If the array date values or value combination is not correct.
    */
-  public static function createFromArray(array $date_parts, $timezone = NULL, $settings = array()) {
+  public static function createFromArray(array $date_parts, $timezone = NULL, $settings = []) {
     $date_parts = static::prepareArray($date_parts, TRUE);
     if (static::checkArray($date_parts)) {
       // Even with validation, we can end up with a value that the
@@ -167,7 +167,7 @@ public static function createFromArray(array $date_parts, $timezone = NULL, $set
    * @throws \InvalidArgumentException
    *   If the timestamp is not numeric.
    */
-  public static function createFromTimestamp($timestamp, $timezone = NULL, $settings = array()) {
+  public static function createFromTimestamp($timestamp, $timezone = NULL, $settings = []) {
     if (!is_numeric($timestamp)) {
       throw new \InvalidArgumentException('The timestamp must be numeric.');
     }
@@ -207,7 +207,7 @@ public static function createFromTimestamp($timestamp, $timezone = NULL, $settin
    * @throws \UnexpectedValueException
    *   If the created date does not match the input value.
    */
-  public static function createFromFormat($format, $time, $timezone = NULL, $settings = array()) {
+  public static function createFromFormat($format, $time, $timezone = NULL, $settings = []) {
     if (!isset($settings['validate_format'])) {
       $settings['validate_format'] = TRUE;
     }
@@ -258,7 +258,7 @@ public static function createFromFormat($format, $time, $timezone = NULL, $setti
    *   - debug: (optional) Boolean choice to leave debug values in the
    *     date object for debugging purposes. Defaults to FALSE.
    */
-  public function __construct($time = 'now', $timezone = NULL, $settings = array()) {
+  public function __construct($time = 'now', $timezone = NULL, $settings = []) {
 
     // Unpack settings.
     $this->langcode = !empty($settings['langcode']) ? $settings['langcode'] : NULL;
@@ -310,7 +310,7 @@ public function __call($method, $args) {
     if (!method_exists($this->dateTimeObject, $method)) {
       throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_class($this), $method));
     }
-    return call_user_func_array(array($this->dateTimeObject, $method), $args);
+    return call_user_func_array([$this->dateTimeObject, $method], $args);
   }
 
   /**
@@ -346,7 +346,7 @@ public static function __callStatic($method, $args) {
     if (!method_exists('\DateTime', $method)) {
       throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_called_class(), $method));
     }
-    return call_user_func_array(array('\DateTime', $method), $args);
+    return call_user_func_array(['\DateTime', $method], $args);
   }
 
   /**
@@ -529,24 +529,24 @@ public static function arrayToISO($array, $force_valid_date = FALSE) {
   public static function prepareArray($array, $force_valid_date = FALSE) {
     if ($force_valid_date) {
       $now = new \DateTime();
-      $array += array(
+      $array += [
         'year'   => $now->format('Y'),
         'month'  => 1,
         'day'    => 1,
         'hour'   => 0,
         'minute' => 0,
         'second' => 0,
-      );
+      ];
     }
     else {
-      $array += array(
+      $array += [
         'year'   => '',
         'month'  => '',
         'day'    => '',
         'hour'   => '',
         'minute' => '',
         'second' => '',
-      );
+      ];
     }
     return $array;
   }
@@ -577,7 +577,7 @@ public static function checkArray($array) {
     }
     // Testing for valid time is reversed. Missing time is OK,
     // but incorrect values are not.
-    foreach (array('hour', 'minute', 'second') as $key) {
+    foreach (['hour', 'minute', 'second'] as $key) {
       if (array_key_exists($key, $array)) {
         $value = $array[$key];
         switch ($key) {
@@ -628,7 +628,7 @@ public static function datePad($value, $size = 2) {
    * @return string
    *   The formatted value of the date.
    */
-  public function format($format, $settings = array()) {
+  public function format($format, $settings = []) {
 
     // If there were construction errors, we can't format the date.
     if ($this->hasErrors()) {
diff --git a/core/lib/Drupal/Component/DependencyInjection/Container.php b/core/lib/Drupal/Component/DependencyInjection/Container.php
index 452a2c84d829facd6b5267316eb756e62ca00c31..673736954526fbee7e98b379ff84a2000d0cfd4b 100644
--- a/core/lib/Drupal/Component/DependencyInjection/Container.php
+++ b/core/lib/Drupal/Component/DependencyInjection/Container.php
@@ -57,42 +57,42 @@ class Container implements IntrospectableContainerInterface, ResettableContainer
    *
    * @var array
    */
-  protected $parameters = array();
+  protected $parameters = [];
 
   /**
    * The aliases of the container.
    *
    * @var array
    */
-  protected $aliases = array();
+  protected $aliases = [];
 
   /**
    * The service definitions of the container.
    *
    * @var array
    */
-  protected $serviceDefinitions = array();
+  protected $serviceDefinitions = [];
 
   /**
    * The instantiated services.
    *
    * @var array
    */
-  protected $services = array();
+  protected $services = [];
 
   /**
    * The instantiated private services.
    *
    * @var array
    */
-  protected $privateServices = array();
+  protected $privateServices = [];
 
   /**
    * The currently loading services.
    *
    * @var array
    */
-  protected $loading = array();
+  protected $loading = [];
 
   /**
    * Whether the container parameters can still be changed.
@@ -116,14 +116,14 @@ class Container implements IntrospectableContainerInterface, ResettableContainer
    *   - machine_format: Whether this container definition uses the optimized
    *     machine-readable container format.
    */
-  public function __construct(array $container_definition = array()) {
+  public function __construct(array $container_definition = []) {
     if (!empty($container_definition) && (!isset($container_definition['machine_format']) || $container_definition['machine_format'] !== TRUE)) {
       throw new InvalidArgumentException('The non-optimized format is not supported by this class. Use an optimized machine-readable format instead, e.g. as produced by \Drupal\Component\DependencyInjection\Dumper\OptimizedPhpArrayDumper.');
     }
 
-    $this->aliases = isset($container_definition['aliases']) ? $container_definition['aliases'] : array();
-    $this->parameters = isset($container_definition['parameters']) ? $container_definition['parameters'] : array();
-    $this->serviceDefinitions = isset($container_definition['services']) ? $container_definition['services'] : array();
+    $this->aliases = isset($container_definition['aliases']) ? $container_definition['aliases'] : [];
+    $this->parameters = isset($container_definition['parameters']) ? $container_definition['parameters'] : [];
+    $this->serviceDefinitions = isset($container_definition['services']) ? $container_definition['services'] : [];
     $this->frozen = isset($container_definition['frozen']) ? $container_definition['frozen'] : FALSE;
 
     // Register the service_container with itself.
@@ -228,7 +228,7 @@ protected function createService(array $definition, $id) {
       throw new RuntimeException(sprintf('You have requested a synthetic service ("%s"). The service container does not know how to construct this service. The service will need to be set before it is first used.', $id));
     }
 
-    $arguments = array();
+    $arguments = [];
     if (isset($definition['arguments'])) {
       $arguments = $definition['arguments'];
 
@@ -238,14 +238,14 @@ protected function createService(array $definition, $id) {
     }
 
     if (isset($definition['file'])) {
-      $file = $this->frozen ? $definition['file'] : current($this->resolveServicesAndParameters(array($definition['file'])));
+      $file = $this->frozen ? $definition['file'] : current($this->resolveServicesAndParameters([$definition['file']]));
       require_once $file;
     }
 
     if (isset($definition['factory'])) {
       $factory = $definition['factory'];
       if (is_array($factory)) {
-        $factory = $this->resolveServicesAndParameters(array($factory[0], $factory[1]));
+        $factory = $this->resolveServicesAndParameters([$factory[0], $factory[1]]);
       }
       elseif (!is_string($factory)) {
         throw new RuntimeException(sprintf('Cannot create service "%s" because of invalid factory', $id));
@@ -254,7 +254,7 @@ protected function createService(array $definition, $id) {
       $service = call_user_func_array($factory, $arguments);
     }
     else {
-      $class = $this->frozen ? $definition['class'] : current($this->resolveServicesAndParameters(array($definition['class'])));
+      $class = $this->frozen ? $definition['class'] : current($this->resolveServicesAndParameters([$definition['class']]));
       $length = isset($definition['arguments_count']) ? $definition['arguments_count'] : count($arguments);
 
       // Optimize class instantiation for services with up to 10 parameters as
@@ -322,14 +322,14 @@ protected function createService(array $definition, $id) {
     if (isset($definition['calls'])) {
       foreach ($definition['calls'] as $call) {
         $method = $call[0];
-        $arguments = array();
+        $arguments = [];
         if (!empty($call[1])) {
           $arguments = $call[1];
           if ($arguments instanceof \stdClass) {
             $arguments = $this->resolveServicesAndParameters($arguments);
           }
         }
-        call_user_func_array(array($service, $method), $arguments);
+        call_user_func_array([$service, $method], $arguments);
       }
     }
 
@@ -362,7 +362,7 @@ protected function createService(array $definition, $id) {
    * {@inheritdoc}
    */
   public function set($id, $service, $scope = ContainerInterface::SCOPE_CONTAINER) {
-    if (!in_array($scope, array('container', 'request')) || ('request' === $scope && 'request' !== $id)) {
+    if (!in_array($scope, ['container', 'request']) || ('request' === $scope && 'request' !== $id)) {
       @trigger_error('The concept of container scopes is deprecated since version 2.8 and will be removed in 3.0. Omit the third parameter.', E_USER_DEPRECATED);
     }
 
@@ -549,7 +549,7 @@ protected function resolveServicesAndParameters($arguments) {
    *   An array of strings with suitable alternatives.
    */
   protected function getAlternatives($search_key, array $keys) {
-    $alternatives = array();
+    $alternatives = [];
     foreach ($keys as $key) {
       $lev = levenshtein($search_key, $key);
       if ($lev <= strlen($search_key) / 3 || strpos($key, $search_key) !== FALSE) {
diff --git a/core/lib/Drupal/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumper.php b/core/lib/Drupal/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumper.php
index 76a43fd2a5138bc75cd8857e866652450127b3c5..7673cef8ba56ca97287ec217c4023b50644ac558 100644
--- a/core/lib/Drupal/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumper.php
+++ b/core/lib/Drupal/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumper.php
@@ -49,7 +49,7 @@ class OptimizedPhpArrayDumper extends Dumper {
   /**
    * {@inheritdoc}
    */
-  public function dump(array $options = array()) {
+  public function dump(array $options = []) {
     return serialize($this->getArray());
   }
 
@@ -60,7 +60,7 @@ public function dump(array $options = array()) {
    *   A PHP array representation of the service container.
    */
   public function getArray() {
-    $definition = array();
+    $definition = [];
     $this->aliases = $this->getAliases();
     $definition['aliases'] = $this->getAliases();
     $definition['parameters'] = $this->getParameters();
@@ -77,7 +77,7 @@ public function getArray() {
    *   The aliases.
    */
   protected function getAliases() {
-    $alias_definitions = array();
+    $alias_definitions = [];
 
     $aliases = $this->container->getAliases();
     foreach ($aliases as $alias => $id) {
@@ -99,7 +99,7 @@ protected function getAliases() {
    */
   protected function getParameters() {
     if (!$this->container->getParameterBag()->all()) {
-      return array();
+      return [];
     }
 
     $parameters = $this->container->getParameterBag()->all();
@@ -115,10 +115,10 @@ protected function getParameters() {
    */
   protected function getServiceDefinitions() {
     if (!$this->container->getDefinitions()) {
-      return array();
+      return [];
     }
 
-    $services = array();
+    $services = [];
     foreach ($this->container->getDefinitions() as $id => $definition) {
       // Only store public service definitions, references to shared private
       // services are handled in ::getReferenceCall().
@@ -143,7 +143,7 @@ protected function getServiceDefinitions() {
    *   An array of prepared parameters.
    */
   protected function prepareParameters(array $parameters, $escape = TRUE) {
-    $filtered = array();
+    $filtered = [];
     foreach ($parameters as $key => $value) {
       if (is_array($value)) {
         $value = $this->prepareParameters($value, $escape);
@@ -168,7 +168,7 @@ protected function prepareParameters(array $parameters, $escape = TRUE) {
    *   The escaped parameters.
    */
   protected function escape(array $parameters) {
-    $args = array();
+    $args = [];
 
     foreach ($parameters as $key => $value) {
       if (is_array($value)) {
@@ -199,7 +199,7 @@ protected function escape(array $parameters) {
    *   scope different from SCOPE_CONTAINER and SCOPE_PROTOTYPE.
    */
   protected function getServiceDefinition(Definition $definition) {
-    $service = array();
+    $service = [];
     if ($definition->getClass()) {
       $service['class'] = $definition->getClass();
     }
@@ -279,11 +279,11 @@ protected function getServiceDefinition(Definition $definition) {
    *   The PHP array representation of the method calls.
    */
   protected function dumpMethodCalls(array $calls) {
-    $code = array();
+    $code = [];
 
     foreach ($calls as $key => $call) {
       $method = $call[0];
-      $arguments = array();
+      $arguments = [];
       if (!empty($call[1])) {
         $arguments = $this->dumpCollection($call[1]);
       }
@@ -309,7 +309,7 @@ protected function dumpMethodCalls(array $calls) {
    *   The collection in a suitable format.
    */
   protected function dumpCollection($collection, &$resolve = FALSE) {
-    $code = array();
+    $code = [];
 
     foreach ($collection as $key => $value) {
       if (is_array($value)) {
@@ -332,11 +332,11 @@ protected function dumpCollection($collection, &$resolve = FALSE) {
       return $collection;
     }
 
-    return (object) array(
+    return (object) [
       'type' => 'collection',
       'value' => $code,
       'resolve' => $resolve,
-    );
+    ];
   }
 
   /**
@@ -351,7 +351,7 @@ protected function dumpCollection($collection, &$resolve = FALSE) {
   protected function dumpCallable($callable) {
     if (is_array($callable)) {
       $callable[0] = $this->dumpValue($callable[0]);
-      $callable = array($callable[0], $callable[1]);
+      $callable = [$callable[0], $callable[1]];
     }
 
     return $callable;
@@ -377,12 +377,12 @@ protected function getPrivateServiceCall($id, Definition $definition, $shared =
       $hash = Crypt::hashBase64(serialize($service_definition));
       $id = 'private__' . $hash;
     }
-    return (object) array(
+    return (object) [
       'type' => 'private_service',
       'id' => $id,
       'value' => $service_definition,
       'shared' => $shared,
-    );
+    ];
   }
 
   /**
@@ -399,7 +399,7 @@ protected function getPrivateServiceCall($id, Definition $definition, $shared =
    */
   protected function dumpValue($value) {
     if (is_array($value)) {
-      $code = array();
+      $code = [];
       foreach ($value as $k => $v) {
         $code[$k] = $this->dumpValue($v);
       }
@@ -482,11 +482,11 @@ protected function getReferenceCall($id, Reference $reference = NULL) {
    *   A suitable representation of the service reference.
    */
   protected function getServiceCall($id, $invalid_behavior = ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE) {
-    return (object) array(
+    return (object) [
       'type' => 'service',
       'id' => $id,
       'invalidBehavior' => $invalid_behavior,
-    );
+    ];
   }
 
   /**
@@ -499,10 +499,10 @@ protected function getServiceCall($id, $invalid_behavior = ContainerInterface::E
    *   A suitable representation of the parameter reference.
    */
   protected function getParameterCall($name) {
-    return (object) array(
+    return (object) [
       'type' => 'parameter',
       'name' => $name,
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Component/DependencyInjection/Dumper/PhpArrayDumper.php b/core/lib/Drupal/Component/DependencyInjection/Dumper/PhpArrayDumper.php
index 7be318f714383a28d26bf74177cd26d1faf906e8..a6fa2b9b09e189242e14ac807dd20806455f508a 100644
--- a/core/lib/Drupal/Component/DependencyInjection/Dumper/PhpArrayDumper.php
+++ b/core/lib/Drupal/Component/DependencyInjection/Dumper/PhpArrayDumper.php
@@ -30,7 +30,7 @@ public function getArray() {
    * {@inheritdoc}
    */
   protected function dumpCollection($collection, &$resolve = FALSE) {
-    $code = array();
+    $code = [];
 
     foreach ($collection as $key => $value) {
       if (is_array($value)) {
diff --git a/core/lib/Drupal/Component/DependencyInjection/PhpArrayContainer.php b/core/lib/Drupal/Component/DependencyInjection/PhpArrayContainer.php
index 3ec208630eb25edd32c262caea8f99d017c98273..83d558cbd34054c6abc449ccf23472d5e21de0b4 100644
--- a/core/lib/Drupal/Component/DependencyInjection/PhpArrayContainer.php
+++ b/core/lib/Drupal/Component/DependencyInjection/PhpArrayContainer.php
@@ -27,16 +27,16 @@ class PhpArrayContainer extends Container {
   /**
    * {@inheritdoc}
    */
-  public function __construct(array $container_definition = array()) {
+  public function __construct(array $container_definition = []) {
     if (isset($container_definition['machine_format']) && $container_definition['machine_format'] === TRUE) {
       throw new InvalidArgumentException('The machine-optimized format is not supported by this class. Use a human-readable format instead, e.g. as produced by \Drupal\Component\DependencyInjection\Dumper\PhpArrayDumper.');
     }
 
     // Do not call the parent's constructor as it would bail on the
     // machine-optimized format.
-    $this->aliases = isset($container_definition['aliases']) ? $container_definition['aliases'] : array();
-    $this->parameters = isset($container_definition['parameters']) ? $container_definition['parameters'] : array();
-    $this->serviceDefinitions = isset($container_definition['services']) ? $container_definition['services'] : array();
+    $this->aliases = isset($container_definition['aliases']) ? $container_definition['aliases'] : [];
+    $this->parameters = isset($container_definition['parameters']) ? $container_definition['parameters'] : [];
+    $this->serviceDefinitions = isset($container_definition['services']) ? $container_definition['services'] : [];
     $this->frozen = isset($container_definition['frozen']) ? $container_definition['frozen'] : FALSE;
 
     // Register the service_container with itself.
@@ -57,20 +57,20 @@ protected function createService(array $definition, $id) {
       throw new RuntimeException(sprintf('You have requested a synthetic service ("%s"). The service container does not know how to construct this service. The service will need to be set before it is first used.', $id));
     }
 
-    $arguments = array();
+    $arguments = [];
     if (isset($definition['arguments'])) {
       $arguments = $this->resolveServicesAndParameters($definition['arguments']);
     }
 
     if (isset($definition['file'])) {
-      $file = $this->frozen ? $definition['file'] : current($this->resolveServicesAndParameters(array($definition['file'])));
+      $file = $this->frozen ? $definition['file'] : current($this->resolveServicesAndParameters([$definition['file']]));
       require_once $file;
     }
 
     if (isset($definition['factory'])) {
       $factory = $definition['factory'];
       if (is_array($factory)) {
-        $factory = $this->resolveServicesAndParameters(array($factory[0], $factory[1]));
+        $factory = $this->resolveServicesAndParameters([$factory[0], $factory[1]]);
       }
       elseif (!is_string($factory)) {
         throw new RuntimeException(sprintf('Cannot create service "%s" because of invalid factory', $id));
@@ -79,7 +79,7 @@ protected function createService(array $definition, $id) {
       $service = call_user_func_array($factory, $arguments);
     }
     else {
-      $class = $this->frozen ? $definition['class'] : current($this->resolveServicesAndParameters(array($definition['class'])));
+      $class = $this->frozen ? $definition['class'] : current($this->resolveServicesAndParameters([$definition['class']]));
       $length = isset($definition['arguments_count']) ? $definition['arguments_count'] : count($arguments);
 
       // Optimize class instantiation for services with up to 10 parameters as
@@ -147,12 +147,12 @@ protected function createService(array $definition, $id) {
     if (isset($definition['calls'])) {
       foreach ($definition['calls'] as $call) {
         $method = $call[0];
-        $arguments = array();
+        $arguments = [];
         if (!empty($call[1])) {
           $arguments = $call[1];
           $arguments = $this->resolveServicesAndParameters($arguments);
         }
-        call_user_func_array(array($service, $method), $arguments);
+        call_user_func_array([$service, $method], $arguments);
       }
     }
 
diff --git a/core/lib/Drupal/Component/Diff/Diff.php b/core/lib/Drupal/Component/Diff/Diff.php
index 2e35611dbf78e31409032b837b1e1b222b65b663..d9042bcca715b9838df20e07da27c3e829a12a9f 100644
--- a/core/lib/Drupal/Component/Diff/Diff.php
+++ b/core/lib/Drupal/Component/Diff/Diff.php
@@ -49,7 +49,7 @@ public function __construct($from_lines, $to_lines) {
    */
   public function reverse() {
     $rev = $this;
-    $rev->edits = array();
+    $rev->edits = [];
     foreach ($this->edits as $edit) {
       $rev->edits[] = $edit->reverse();
     }
@@ -96,7 +96,7 @@ public function lcs() {
    * @return array The original sequence of strings.
    */
   public function orig() {
-    $lines = array();
+    $lines = [];
 
     foreach ($this->edits as $edit) {
       if ($edit->orig) {
@@ -115,7 +115,7 @@ public function orig() {
    * @return array The sequence of strings.
    */
   public function closing() {
-    $lines = array();
+    $lines = [];
 
     foreach ($this->edits as $edit) {
       if ($edit->closing) {
diff --git a/core/lib/Drupal/Component/Diff/DiffFormatter.php b/core/lib/Drupal/Component/Diff/DiffFormatter.php
index edcb84df78f6f279cce7a8865c2d25f563dc3109..d70f3e61ad35f96ed6a0efd84f90267b7a812b52 100644
--- a/core/lib/Drupal/Component/Diff/DiffFormatter.php
+++ b/core/lib/Drupal/Component/Diff/DiffFormatter.php
@@ -41,10 +41,10 @@ class DiffFormatter {
    *
    * @var array
    */
-  protected $line_stats = array(
-    'counter' => array('x' => 0, 'y' => 0),
-    'offset' => array('x' => 0, 'y' => 0),
-  );
+  protected $line_stats = [
+    'counter' => ['x' => 0, 'y' => 0],
+    'offset' => ['x' => 0, 'y' => 0],
+  ];
 
   /**
    * Format a diff.
@@ -58,7 +58,7 @@ class DiffFormatter {
   public function format(Diff $diff) {
     $xi = $yi = 1;
     $block = FALSE;
-    $context = array();
+    $context = [];
 
     $nlead = $this->leading_context_lines;
     $ntrail = $this->trailing_context_lines;
@@ -87,7 +87,7 @@ public function format(Diff $diff) {
           $context = array_slice($context, sizeof($context) - $nlead);
           $x0 = $xi - sizeof($context);
           $y0 = $yi - sizeof($context);
-          $block = array();
+          $block = [];
           if ($context) {
             $block[] = new DiffOpCopy($context);
           }
diff --git a/core/lib/Drupal/Component/Diff/Engine/DiffEngine.php b/core/lib/Drupal/Component/Diff/Engine/DiffEngine.php
index b27886d36dd480dff134cb3735d7a51cbeffd34c..7885c6f00e5473119e406aca5363529c38c0d2c0 100644
--- a/core/lib/Drupal/Component/Diff/Engine/DiffEngine.php
+++ b/core/lib/Drupal/Component/Diff/Engine/DiffEngine.php
@@ -38,9 +38,9 @@ public function diff($from_lines, $to_lines) {
     $n_from = sizeof($from_lines);
     $n_to = sizeof($to_lines);
 
-    $this->xchanged = $this->ychanged = array();
-    $this->xv = $this->yv = array();
-    $this->xind = $this->yind = array();
+    $this->xchanged = $this->ychanged = [];
+    $this->xv = $this->yv = [];
+    $this->xind = $this->yind = [];
     unset($this->seq);
     unset($this->in_seq);
     unset($this->lcs);
@@ -93,14 +93,14 @@ public function diff($from_lines, $to_lines) {
     $this->_shift_boundaries($to_lines, $this->ychanged, $this->xchanged);
 
     // Compute the edit operations.
-    $edits = array();
+    $edits = [];
     $xi = $yi = 0;
     while ($xi < $n_from || $yi < $n_to) {
       $this::USE_ASSERTS && assert($yi < $n_to || $this->xchanged[$xi]);
       $this::USE_ASSERTS && assert($xi < $n_from || $this->ychanged[$yi]);
 
       // Skip matching "snake".
-      $copy = array();
+      $copy = [];
       while ( $xi < $n_from && $yi < $n_to && !$this->xchanged[$xi] && !$this->ychanged[$yi]) {
         $copy[] = $from_lines[$xi++];
         ++$yi;
@@ -109,11 +109,11 @@ public function diff($from_lines, $to_lines) {
         $edits[] = new DiffOpCopy($copy);
       }
       // Find deletes & adds.
-      $delete = array();
+      $delete = [];
       while ($xi < $n_from && $this->xchanged[$xi]) {
         $delete[] = $from_lines[$xi++];
       }
-      $add = array();
+      $add = [];
       while ($yi < $n_to && $this->ychanged[$yi]) {
         $add[] = $to_lines[$yi++];
       }
@@ -167,7 +167,7 @@ protected function _diag($xoff, $xlim, $yoff, $ylim, $nchunks) {
       // Things seems faster (I'm not sure I understand why)
       // when the shortest sequence in X.
       $flip = TRUE;
-      list($xoff, $xlim, $yoff, $ylim) = array($yoff, $ylim, $xoff, $xlim);
+      list($xoff, $xlim, $yoff, $ylim) = [$yoff, $ylim, $xoff, $xlim];
     }
 
     if ($flip) {
@@ -182,8 +182,8 @@ protected function _diag($xoff, $xlim, $yoff, $ylim, $nchunks) {
     }
     $this->lcs = 0;
     $this->seq[0] = $yoff - 1;
-    $this->in_seq = array();
-    $ymids[0] = array();
+    $this->in_seq = [];
+    $ymids[0] = [];
 
     $numer = $xlim - $xoff + $nchunks - 1;
     $x = $xoff;
@@ -228,16 +228,16 @@ protected function _diag($xoff, $xlim, $yoff, $ylim, $nchunks) {
       }
     }
 
-    $seps[] = $flip ? array($yoff, $xoff) : array($xoff, $yoff);
+    $seps[] = $flip ? [$yoff, $xoff] : [$xoff, $yoff];
     $ymid = $ymids[$this->lcs];
     for ($n = 0; $n < $nchunks - 1; $n++) {
       $x1 = $xoff + (int)(($numer + ($xlim - $xoff) * $n) / $nchunks);
       $y1 = $ymid[$n] + 1;
-      $seps[] = $flip ? array($y1, $x1) : array($x1, $y1);
+      $seps[] = $flip ? [$y1, $x1] : [$x1, $y1];
     }
-    $seps[] = $flip ? array($ylim, $xlim) : array($xlim, $ylim);
+    $seps[] = $flip ? [$ylim, $xlim] : [$xlim, $ylim];
 
-    return array($this->lcs, $seps);
+    return [$this->lcs, $seps];
   }
 
   protected function _lcs_pos($ypos) {
diff --git a/core/lib/Drupal/Component/Diff/Engine/HWLDFWordAccumulator.php b/core/lib/Drupal/Component/Diff/Engine/HWLDFWordAccumulator.php
index 532c7014c174307dc0bbffcc1cf2929cc0c46056..eb7d9434c963b133f0a7627a91f37a50e51ca206 100644
--- a/core/lib/Drupal/Component/Diff/Engine/HWLDFWordAccumulator.php
+++ b/core/lib/Drupal/Component/Diff/Engine/HWLDFWordAccumulator.php
@@ -20,7 +20,7 @@ class HWLDFWordAccumulator {
    */
   const NBSP = '&#160;';
 
-  protected $lines = array();
+  protected $lines = [];
 
   protected $line = '';
 
diff --git a/core/lib/Drupal/Component/Diff/WordLevelDiff.php b/core/lib/Drupal/Component/Diff/WordLevelDiff.php
index a19c687ef785b4e2ace0059475625c471a401b9b..a8c2f80f256ecc770c3131c5af362d0458a1802e 100644
--- a/core/lib/Drupal/Component/Diff/WordLevelDiff.php
+++ b/core/lib/Drupal/Component/Diff/WordLevelDiff.php
@@ -22,8 +22,8 @@ public function __construct($orig_lines, $closing_lines) {
   }
 
   protected function _split($lines) {
-    $words = array();
-    $stripped = array();
+    $words = [];
+    $stripped = [];
     $first = TRUE;
     foreach ($lines as $line) {
       // If the line is too long, just pretend the entire line is one big word
@@ -46,7 +46,7 @@ protected function _split($lines) {
         }
       }
     }
-    return array($words, $stripped);
+    return [$words, $stripped];
   }
 
   public function orig() {
diff --git a/core/lib/Drupal/Component/Discovery/YamlDirectoryDiscovery.php b/core/lib/Drupal/Component/Discovery/YamlDirectoryDiscovery.php
index 6d0eceb5284e7d3d90d9cf211cfa0bb8972be527..db2c3cc9652a38e3b554659254622dd2ad1d197a 100644
--- a/core/lib/Drupal/Component/Discovery/YamlDirectoryDiscovery.php
+++ b/core/lib/Drupal/Component/Discovery/YamlDirectoryDiscovery.php
@@ -65,7 +65,7 @@ public function __construct(array $directories, $file_cache_key_suffix, $key = '
    * {@inheritdoc}
    */
   public function findAll() {
-    $all = array();
+    $all = [];
 
     $files = $this->findFiles();
 
diff --git a/core/lib/Drupal/Component/Discovery/YamlDiscovery.php b/core/lib/Drupal/Component/Discovery/YamlDiscovery.php
index ea5c9c25b39a207ac6fd7285e453aa8aaa69b82c..f13e60b97fab94a4919e2a9d35ea88be0105b1bb 100644
--- a/core/lib/Drupal/Component/Discovery/YamlDiscovery.php
+++ b/core/lib/Drupal/Component/Discovery/YamlDiscovery.php
@@ -22,7 +22,7 @@ class YamlDiscovery implements DiscoverableInterface {
    *
    * @var array
    */
-  protected $directories = array();
+  protected $directories = [];
 
   /**
    * Constructs a YamlDiscovery object.
@@ -42,7 +42,7 @@ public function __construct($name, array $directories) {
    * {@inheritdoc}
    */
   public function findAll() {
-    $all = array();
+    $all = [];
 
     $files = $this->findFiles();
     $provider_by_files = array_flip($files);
@@ -86,7 +86,7 @@ protected function decode($file) {
    * @return array
    */
   protected function findFiles() {
-    $files = array();
+    $files = [];
     foreach ($this->directories as $provider => $directory) {
       $file = $directory . '/' . $provider . '.' . $this->name . '.yml';
       if (file_exists($file)) {
diff --git a/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php b/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
index a933b065948e89ca4e71dabe44d2740fbe591fbf..6c1e200825306709f2311b950bf903012a1d65b3 100644
--- a/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
+++ b/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
@@ -230,14 +230,14 @@ public function removeListener($event_name, $listener) {
   public function addSubscriber(EventSubscriberInterface $subscriber) {
     foreach ($subscriber->getSubscribedEvents() as $event_name => $params) {
       if (is_string($params)) {
-        $this->addListener($event_name, array($subscriber, $params));
+        $this->addListener($event_name, [$subscriber, $params]);
       }
       elseif (is_string($params[0])) {
-        $this->addListener($event_name, array($subscriber, $params[0]), isset($params[1]) ? $params[1] : 0);
+        $this->addListener($event_name, [$subscriber, $params[0]], isset($params[1]) ? $params[1] : 0);
       }
       else {
         foreach ($params as $listener) {
-          $this->addListener($event_name, array($subscriber, $listener[0]), isset($listener[1]) ? $listener[1] : 0);
+          $this->addListener($event_name, [$subscriber, $listener[0]], isset($listener[1]) ? $listener[1] : 0);
         }
       }
     }
@@ -250,11 +250,11 @@ public function removeSubscriber(EventSubscriberInterface $subscriber) {
     foreach ($subscriber->getSubscribedEvents() as $event_name => $params) {
       if (is_array($params) && is_array($params[0])) {
         foreach ($params as $listener) {
-          $this->removeListener($event_name, array($subscriber, $listener[0]));
+          $this->removeListener($event_name, [$subscriber, $listener[0]]);
         }
       }
       else {
-        $this->removeListener($event_name, array($subscriber, is_string($params) ? $params : $params[0]));
+        $this->removeListener($event_name, [$subscriber, is_string($params) ? $params : $params[0]]);
       }
     }
   }
diff --git a/core/lib/Drupal/Component/FileSystem/FileSystem.php b/core/lib/Drupal/Component/FileSystem/FileSystem.php
index 26989cdb57f040d64e6340fb9f1783e2b4344341..7a1c551f2430828e5d54040ae358ee0052823503 100644
--- a/core/lib/Drupal/Component/FileSystem/FileSystem.php
+++ b/core/lib/Drupal/Component/FileSystem/FileSystem.php
@@ -15,7 +15,7 @@ class FileSystem {
    *   suitable temporary directory can be found.
    */
   public static function getOsTemporaryDirectory() {
-    $directories = array();
+    $directories = [];
 
     // Has PHP been set with an upload_tmp_dir?
     if (ini_get('upload_tmp_dir')) {
diff --git a/core/lib/Drupal/Component/Gettext/PoHeader.php b/core/lib/Drupal/Component/Gettext/PoHeader.php
index 59223014dd3748f521772c7b61755d9ab097d28c..806beba008dea29a4cde2c53b8a23b9f2eb971de 100644
--- a/core/lib/Drupal/Component/Gettext/PoHeader.php
+++ b/core/lib/Drupal/Component/Gettext/PoHeader.php
@@ -191,9 +191,9 @@ public function __toString() {
    * @throws Exception
    */
   function parsePluralForms($pluralforms) {
-    $plurals = array();
+    $plurals = [];
     // First, delete all whitespace.
-    $pluralforms = strtr($pluralforms, array(" " => "", "\t" => ""));
+    $pluralforms = strtr($pluralforms, [" " => "", "\t" => ""]);
 
     // Select the parts that define nplurals and plural.
     $nplurals = strstr($pluralforms, "nplurals=");
@@ -215,7 +215,7 @@ function parsePluralForms($pluralforms) {
 
     // If the number of plurals is zero, we return a default result.
     if ($nplurals == 0) {
-      return array($nplurals, array('default' => 0));
+      return [$nplurals, ['default' => 0]];
     }
 
     // Calculate possible plural positions of different plural values. All known
@@ -233,7 +233,7 @@ function parsePluralForms($pluralforms) {
       });
       $plurals['default'] = $default;
 
-      return array($nplurals, $plurals);
+      return [$nplurals, $plurals];
     }
     else {
       throw new \Exception('The plural formula could not be parsed.');
@@ -250,7 +250,7 @@ function parsePluralForms($pluralforms) {
    *   An associative array of key-value pairs.
    */
   private function parseHeader($header) {
-    $header_parsed = array();
+    $header_parsed = [];
     $lines = array_map('trim', explode("\n", $header));
     foreach ($lines as $line) {
       if ($line) {
@@ -275,17 +275,17 @@ private function parseHeader($header) {
    */
   private function parseArithmetic($string) {
     // Operator precedence table.
-    $precedence = array("(" => -1, ")" => -1, "?" => 1, ":" => 1, "||" => 3, "&&" => 4, "==" => 5, "!=" => 5, "<" => 6, ">" => 6, "<=" => 6, ">=" => 6, "+" => 7, "-" => 7, "*" => 8, "/" => 8, "%" => 8);
+    $precedence = ["(" => -1, ")" => -1, "?" => 1, ":" => 1, "||" => 3, "&&" => 4, "==" => 5, "!=" => 5, "<" => 6, ">" => 6, "<=" => 6, ">=" => 6, "+" => 7, "-" => 7, "*" => 8, "/" => 8, "%" => 8];
     // Right associativity.
-    $right_associativity = array("?" => 1, ":" => 1);
+    $right_associativity = ["?" => 1, ":" => 1];
 
     $tokens = $this->tokenizeFormula($string);
 
     // Parse by converting into infix notation then back into postfix
     // Operator stack - holds math operators and symbols.
-    $operator_stack = array();
+    $operator_stack = [];
     // Element Stack - holds data to be operated on.
-    $element_stack = array();
+    $element_stack = [];
 
     foreach ($tokens as $token) {
       $current_token = $token;
@@ -373,7 +373,7 @@ private function parseArithmetic($string) {
    */
   private function tokenizeFormula($formula) {
     $formula = str_replace(" ", "", $formula);
-    $tokens = array();
+    $tokens = [];
     for ($i = 0; $i < strlen($formula); $i++) {
       if (is_numeric($formula[$i])) {
         $num = $formula[$i];
diff --git a/core/lib/Drupal/Component/Gettext/PoItem.php b/core/lib/Drupal/Component/Gettext/PoItem.php
index 6cedff11042b25096d4b46374cbdaaa34b560709..6d76d6c218c9444c8dcd56153b0daf3a37bdfddc 100644
--- a/core/lib/Drupal/Component/Gettext/PoItem.php
+++ b/core/lib/Drupal/Component/Gettext/PoItem.php
@@ -171,7 +171,7 @@ function setComment($comment) {
    *
    * @param array $values
    */
-  public function setFromArray(array $values = array()) {
+  public function setFromArray(array $values = []) {
     if (isset($values['context'])) {
       $this->setContext($values['context']);
     }
diff --git a/core/lib/Drupal/Component/Gettext/PoMemoryWriter.php b/core/lib/Drupal/Component/Gettext/PoMemoryWriter.php
index 37070cb9b096f595215af75f572ba2be9f4bfa24..c8da6e6d86ff9e3b3a782ff7d679223438ee470d 100644
--- a/core/lib/Drupal/Component/Gettext/PoMemoryWriter.php
+++ b/core/lib/Drupal/Component/Gettext/PoMemoryWriter.php
@@ -18,7 +18,7 @@ class PoMemoryWriter implements PoWriterInterface {
    * Constructor, initialize empty items.
    */
   function __construct() {
-    $this->_items = array();
+    $this->_items = [];
   }
 
   /**
diff --git a/core/lib/Drupal/Component/Gettext/PoStreamReader.php b/core/lib/Drupal/Component/Gettext/PoStreamReader.php
index faaa95f91a8f21fe1c2fb0f83c096a0d1f4b3db5..c44f9a1a691eccf816677d952357bfe9e0d7bda2 100644
--- a/core/lib/Drupal/Component/Gettext/PoStreamReader.php
+++ b/core/lib/Drupal/Component/Gettext/PoStreamReader.php
@@ -39,7 +39,7 @@ class PoStreamReader implements PoStreamInterface, PoReaderInterface {
    *
    * @var array
    */
-  private $_current_item = array();
+  private $_current_item = [];
 
   /**
    * Current plural index for plural translations.
@@ -261,14 +261,14 @@ private function readLine() {
       $this->_line_number++;
 
       // Initialize common values for error logging.
-      $log_vars = array(
+      $log_vars = [
         '%uri' => $this->getURI(),
         '%line' => $this->_line_number,
-      );
+      ];
 
       // Trim away the linefeed. \\n might appear at the end of the string if
       // another line continuing the same string follows. We can remove that.
-      $line = trim(strtr($line, array("\\\n" => "")));
+      $line = trim(strtr($line, ["\\\n" => ""]));
 
       if (!strncmp('#', $line, 1)) {
         // Lines starting with '#' are comments.
@@ -282,7 +282,7 @@ private function readLine() {
           $this->setItemFromArray($this->_current_item);
 
           // Start a new entry for the comment.
-          $this->_current_item = array();
+          $this->_current_item = [];
           $this->_current_item['#'][] = substr($line, 1);
 
           $this->_context = 'COMMENT';
@@ -319,7 +319,7 @@ private function readLine() {
         if (is_string($this->_current_item['msgid'])) {
           // The first value was stored as string. Now we know the context is
           // plural, it is converted to array.
-          $this->_current_item['msgid'] = array($this->_current_item['msgid']);
+          $this->_current_item['msgid'] = [$this->_current_item['msgid']];
         }
         $this->_current_item['msgid'][] = $quoted;
 
@@ -334,7 +334,7 @@ private function readLine() {
           $this->setItemFromArray($this->_current_item);
 
           // Start a new context for the msgid.
-          $this->_current_item = array();
+          $this->_current_item = [];
         }
         elseif ($this->_context == 'MSGID') {
           // We are currently already in the context, meaning we passed an id with no data.
@@ -363,7 +363,7 @@ private function readLine() {
         if (($this->_context == 'MSGSTR') || ($this->_context == 'MSGSTR_ARR')) {
           // We are currently in string context, save current item.
           $this->setItemFromArray($this->_current_item);
-          $this->_current_item = array();
+          $this->_current_item = [];
         }
         elseif (!empty($this->_current_item['msgctxt'])) {
           // A context cannot apply to another context.
@@ -421,7 +421,7 @@ private function readLine() {
           return FALSE;
         }
         if (!isset($this->_current_item['msgstr']) || !is_array($this->_current_item['msgstr'])) {
-          $this->_current_item['msgstr'] = array();
+          $this->_current_item['msgstr'] = [];
         }
 
         $this->_current_item['msgstr'][$this->_current_plural_index] = $quoted;
@@ -500,7 +500,7 @@ private function readLine() {
     // Empty line read or EOF of PO stream, close out the last entry.
     if (($this->_context == 'MSGSTR') || ($this->_context == 'MSGSTR_ARR')) {
       $this->setItemFromArray($this->_current_item);
-      $this->_current_item = array();
+      $this->_current_item = [];
     }
     elseif ($this->_context != 'COMMENT') {
       $this->_errors[] = SafeMarkup::format('The translation stream %uri ended unexpectedly at line %line.', $log_vars);
diff --git a/core/lib/Drupal/Component/Graph/Graph.php b/core/lib/Drupal/Component/Graph/Graph.php
index 5d8d5caf87894ff724c8eb3a6f56355238f617be..b155faa6625927e8de5bf9dcd66b192c3c88113a 100644
--- a/core/lib/Drupal/Component/Graph/Graph.php
+++ b/core/lib/Drupal/Component/Graph/Graph.php
@@ -56,13 +56,13 @@ public function __construct($graph) {
    *     identifier.
    */
   public function searchAndSort() {
-    $state = array(
+    $state = [
       // The order of last visit of the depth first search. This is the reverse
       // of the topological order if the graph is acyclic.
-      'last_visit_order' => array(),
+      'last_visit_order' => [],
       // The components of the graph.
-      'components' => array(),
-    );
+      'components' => [],
+    ];
     // Perform the actual search.
     foreach ($this->graph as $start => $data) {
       $this->depthFirstSearch($state, $start);
@@ -71,7 +71,7 @@ public function searchAndSort() {
     // We do such a numbering that every component starts with 0. This is useful
     // for module installs as we can install every 0 weighted module in one
     // request, and then every 1 weighted etc.
-    $component_weights = array();
+    $component_weights = [];
 
     foreach ($state['last_visit_order'] as $vertex) {
       $component = $this->graph[$vertex]['component'];
@@ -108,7 +108,7 @@ protected function depthFirstSearch(&$state, $start, &$component = NULL) {
       return;
     }
     // Mark $start as visited.
-    $this->graph[$start]['paths'] = array();
+    $this->graph[$start]['paths'] = [];
 
     // Assign $start to the current component.
     $this->graph[$start]['component'] = $component;
diff --git a/core/lib/Drupal/Component/PhpStorage/FileReadOnlyStorage.php b/core/lib/Drupal/Component/PhpStorage/FileReadOnlyStorage.php
index 5dc159ff576eb52db1435b3a66b4e2618f0506e8..5795638a3738a0c53aa57d4d7bbdf6b1bf2da026 100644
--- a/core/lib/Drupal/Component/PhpStorage/FileReadOnlyStorage.php
+++ b/core/lib/Drupal/Component/PhpStorage/FileReadOnlyStorage.php
@@ -83,7 +83,7 @@ public function deleteAll() {
    * {@inheritdoc}
    */
   public function listAll() {
-    $names = array();
+    $names = [];
     if (file_exists($this->directory)) {
       foreach (new \DirectoryIterator($this->directory) as $fileinfo) {
         if (!$fileinfo->isDot()) {
diff --git a/core/lib/Drupal/Component/PhpStorage/FileStorage.php b/core/lib/Drupal/Component/PhpStorage/FileStorage.php
index f23c0c0671dc852f31ec44e9555b9108f0f1893f..e82ec2d6dd85e7ef2d5580b28cbc42ba011ae521 100644
--- a/core/lib/Drupal/Component/PhpStorage/FileStorage.php
+++ b/core/lib/Drupal/Component/PhpStorage/FileStorage.php
@@ -238,7 +238,7 @@ protected function unlink($path) {
    * {@inheritdoc}
    */
   public function listAll() {
-    $names = array();
+    $names = [];
     if (file_exists($this->directory)) {
       foreach (new \DirectoryIterator($this->directory) as $fileinfo) {
         if (!$fileinfo->isDot()) {
diff --git a/core/lib/Drupal/Component/Plugin/Context/Context.php b/core/lib/Drupal/Component/Plugin/Context/Context.php
index 3713d48097e324b7b2df02d1922af8bfc06119d0..8a225d4a4a89dd09cf098e3b441d02765ab02927 100644
--- a/core/lib/Drupal/Component/Plugin/Context/Context.php
+++ b/core/lib/Drupal/Component/Plugin/Context/Context.php
@@ -79,7 +79,7 @@ public function getConstraints() {
     if (empty($this->contextDefinition['class'])) {
       throw new ContextException("An error was encountered while trying to validate the context.");
     }
-    return array(new Type($this->contextDefinition['class']));
+    return [new Type($this->contextDefinition['class'])];
   }
 
   /**
diff --git a/core/lib/Drupal/Component/Plugin/ContextAwarePluginBase.php b/core/lib/Drupal/Component/Plugin/ContextAwarePluginBase.php
index 96318ac79aa5e2f0ecbca1694ae299f98104544f..b9f6e02217ad136bb9fe539152250d580f4dfe9c 100644
--- a/core/lib/Drupal/Component/Plugin/ContextAwarePluginBase.php
+++ b/core/lib/Drupal/Component/Plugin/ContextAwarePluginBase.php
@@ -67,7 +67,7 @@ protected function createContextFromConfiguration(array $context_configuration)
    */
   public function getContextDefinitions() {
     $definition = $this->getPluginDefinition();
-    return !empty($definition['context']) ? $definition['context'] : array();
+    return !empty($definition['context']) ? $definition['context'] : [];
   }
 
   /**
@@ -114,7 +114,7 @@ public function setContext($name, ContextInterface $context) {
    * {@inheritdoc}
    */
   public function getContextValues() {
-    $values = array();
+    $values = [];
     foreach ($this->getContextDefinitions() as $name => $definition) {
       $values[$name] = isset($this->context[$name]) ? $this->context[$name]->getContextValue() : NULL;
     }
diff --git a/core/lib/Drupal/Component/Plugin/Derivative/DeriverBase.php b/core/lib/Drupal/Component/Plugin/Derivative/DeriverBase.php
index 0c97c6df0fe0d1b513c5b1549f14f0c616b11418..f49ab9920c98e9d14bb9251dbfd20e1a2a692f1d 100644
--- a/core/lib/Drupal/Component/Plugin/Derivative/DeriverBase.php
+++ b/core/lib/Drupal/Component/Plugin/Derivative/DeriverBase.php
@@ -12,7 +12,7 @@ abstract class DeriverBase implements DeriverInterface {
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Component/Plugin/Discovery/DerivativeDiscoveryDecorator.php b/core/lib/Drupal/Component/Plugin/Discovery/DerivativeDiscoveryDecorator.php
index 0cee17055fd294e669a5dfdd41f8ed892b2c9294..6b47af01717b9f904a6eb8afc56724ab8e045ddd 100644
--- a/core/lib/Drupal/Component/Plugin/Discovery/DerivativeDiscoveryDecorator.php
+++ b/core/lib/Drupal/Component/Plugin/Discovery/DerivativeDiscoveryDecorator.php
@@ -21,7 +21,7 @@ class DerivativeDiscoveryDecorator implements DiscoveryInterface {
    * @var \Drupal\Component\Plugin\Derivative\DeriverInterface[]
    *   Keys are base plugin IDs.
    */
-  protected $derivers = array();
+  protected $derivers = [];
 
   /**
    * The decorated plugin discovery.
@@ -94,7 +94,7 @@ public function getDefinitions() {
    * DiscoveryInterface::getDefinitions().
    */
   protected function getDerivatives(array $base_plugin_definitions) {
-    $plugin_definitions = array();
+    $plugin_definitions = [];
     foreach ($base_plugin_definitions as $base_plugin_id => $plugin_definition) {
       $deriver = $this->getDeriver($base_plugin_id, $plugin_definition);
       if ($deriver) {
@@ -137,7 +137,7 @@ protected function decodePluginId($plugin_id) {
       return explode(':', $plugin_id, 2);
     }
 
-    return array($plugin_id, NULL);
+    return [$plugin_id, NULL];
   }
 
   /**
@@ -239,7 +239,7 @@ protected function mergeDerivativeDefinition($base_plugin_definition, $derivativ
     // Use this definition as defaults if a plugin already defined itself as
     // this derivative, but filter out empty values first.
     $filtered_base = array_filter($base_plugin_definition);
-    $derivative_definition = $filtered_base + ($derivative_definition ?: array());
+    $derivative_definition = $filtered_base + ($derivative_definition ?: []);
     // Add back any empty keys that the derivative didn't have.
     return $derivative_definition + $base_plugin_definition;
   }
@@ -248,7 +248,7 @@ protected function mergeDerivativeDefinition($base_plugin_definition, $derivativ
    * Passes through all unknown calls onto the decorated object.
    */
   public function __call($method, $args) {
-    return call_user_func_array(array($this->decorated, $method), $args);
+    return call_user_func_array([$this->decorated, $method], $args);
   }
 
 }
diff --git a/core/lib/Drupal/Component/Plugin/Discovery/StaticDiscovery.php b/core/lib/Drupal/Component/Plugin/Discovery/StaticDiscovery.php
index f7ee6718a8ae385afe2800aba183a2ab50ad330e..281860254ddc3f8ffa017ca943cf6d2719e4048c 100644
--- a/core/lib/Drupal/Component/Plugin/Discovery/StaticDiscovery.php
+++ b/core/lib/Drupal/Component/Plugin/Discovery/StaticDiscovery.php
@@ -15,7 +15,7 @@ class StaticDiscovery implements DiscoveryInterface {
    */
   public function getDefinitions() {
     if (!$this->definitions) {
-      $this->definitions = array();
+      $this->definitions = [];
     }
     return $this->definitions;
   }
diff --git a/core/lib/Drupal/Component/Plugin/Discovery/StaticDiscoveryDecorator.php b/core/lib/Drupal/Component/Plugin/Discovery/StaticDiscoveryDecorator.php
index 889d146b92d37b9dd30c27dfd0ef936a45763053..968dcb9e3559a11bc74f6d797c3294cb53823daf 100644
--- a/core/lib/Drupal/Component/Plugin/Discovery/StaticDiscoveryDecorator.php
+++ b/core/lib/Drupal/Component/Plugin/Discovery/StaticDiscoveryDecorator.php
@@ -61,7 +61,7 @@ public function getDefinitions() {
    * Passes through all unknown calls onto the decorated object
    */
   public function __call($method, $args) {
-    return call_user_func_array(array($this->decorated, $method), $args);
+    return call_user_func_array([$this->decorated, $method], $args);
   }
 
 }
diff --git a/core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php b/core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php
index 2cca811f884218a203e4d219a81f3a06eb77fb0e..1f203fb2073cac8940a9da06a1fe6a75bdd7b5ef 100644
--- a/core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php
+++ b/core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php
@@ -49,7 +49,7 @@ public function __construct(DiscoveryInterface $discovery, $plugin_interface = N
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $plugin_definition = $this->discovery->getDefinition($plugin_id);
     $plugin_class = static::getPluginClass($plugin_id, $plugin_definition, $this->interface);
     return new $plugin_class($configuration, $plugin_id, $plugin_definition);
diff --git a/core/lib/Drupal/Component/Plugin/Factory/FactoryInterface.php b/core/lib/Drupal/Component/Plugin/Factory/FactoryInterface.php
index f1d07ff7d746dfd19ca8fd39b0d67c5c56a19258..8cf046b9c0dff87c801ab49e5d8cb4f7dbe15a0d 100644
--- a/core/lib/Drupal/Component/Plugin/Factory/FactoryInterface.php
+++ b/core/lib/Drupal/Component/Plugin/Factory/FactoryInterface.php
@@ -21,6 +21,6 @@ interface FactoryInterface {
    * @throws \Drupal\Component\Plugin\Exception\PluginException
    *   If the instance cannot be created, such as if the ID is invalid.
    */
-  public function createInstance($plugin_id, array $configuration = array());
+  public function createInstance($plugin_id, array $configuration = []);
 
 }
diff --git a/core/lib/Drupal/Component/Plugin/Factory/ReflectionFactory.php b/core/lib/Drupal/Component/Plugin/Factory/ReflectionFactory.php
index 9954422d295067d19b6f85a5382fd428a7d044db..8a42ce3d2a5399aa86a559cf686cc2bd61649394 100644
--- a/core/lib/Drupal/Component/Plugin/Factory/ReflectionFactory.php
+++ b/core/lib/Drupal/Component/Plugin/Factory/ReflectionFactory.php
@@ -13,7 +13,7 @@ class ReflectionFactory extends DefaultFactory {
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $plugin_definition = $this->discovery->getDefinition($plugin_id);
     $plugin_class = static::getPluginClass($plugin_id, $plugin_definition, $this->interface);
 
@@ -51,7 +51,7 @@ public function createInstance($plugin_id, array $configuration = array()) {
    */
   protected function getInstanceArguments(\ReflectionClass $reflector, $plugin_id, $plugin_definition, array $configuration) {
 
-    $arguments = array();
+    $arguments = [];
     foreach ($reflector->getMethod('__construct')->getParameters() as $param) {
       $param_name = $param->getName();
 
diff --git a/core/lib/Drupal/Component/Plugin/FallbackPluginManagerInterface.php b/core/lib/Drupal/Component/Plugin/FallbackPluginManagerInterface.php
index 7af6c8affcc64531333a87a7591af009469842fe..0a85e67e1189ffc7d5f1f29accb76c46897b97da 100644
--- a/core/lib/Drupal/Component/Plugin/FallbackPluginManagerInterface.php
+++ b/core/lib/Drupal/Component/Plugin/FallbackPluginManagerInterface.php
@@ -18,6 +18,6 @@ interface FallbackPluginManagerInterface {
    * @return string
    *   The id of an existing plugin to use when the plugin does not exist.
    */
-  public function getFallbackPluginId($plugin_id, array $configuration = array());
+  public function getFallbackPluginId($plugin_id, array $configuration = []);
 
 }
diff --git a/core/lib/Drupal/Component/Plugin/LazyPluginCollection.php b/core/lib/Drupal/Component/Plugin/LazyPluginCollection.php
index 1d90af79d10e7dc49611ad97febbc376ae671627..b55b04e954add5e4e96712ee0d70ba4b826f1a23 100644
--- a/core/lib/Drupal/Component/Plugin/LazyPluginCollection.php
+++ b/core/lib/Drupal/Component/Plugin/LazyPluginCollection.php
@@ -14,14 +14,14 @@ abstract class LazyPluginCollection implements \IteratorAggregate, \Countable {
    *
    * @var array
    */
-  protected $pluginInstances = array();
+  protected $pluginInstances = [];
 
   /**
    * Stores the IDs of all potential plugin instances.
    *
    * @var array
    */
-  protected $instanceIDs = array();
+  protected $instanceIDs = [];
 
   /**
    * Initializes and stores a plugin.
@@ -53,7 +53,7 @@ abstract public function setConfiguration($configuration);
    * Clears all instantiated plugins.
    */
   public function clear() {
-    $this->pluginInstances = array();
+    $this->pluginInstances = [];
   }
 
   /**
diff --git a/core/lib/Drupal/Component/Plugin/PluginManagerBase.php b/core/lib/Drupal/Component/Plugin/PluginManagerBase.php
index 5fb32a2a6ae76da9793efcae5f0f3d4af2e36f5a..34416ff4371d84974984205b07b2cca8ffba0c69 100644
--- a/core/lib/Drupal/Component/Plugin/PluginManagerBase.php
+++ b/core/lib/Drupal/Component/Plugin/PluginManagerBase.php
@@ -68,7 +68,7 @@ public function getDefinitions() {
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     // If this PluginManager has fallback capabilities catch
     // PluginNotFoundExceptions.
     if ($this instanceof FallbackPluginManagerInterface) {
diff --git a/core/lib/Drupal/Component/Transliteration/PhpTransliteration.php b/core/lib/Drupal/Component/Transliteration/PhpTransliteration.php
index c20168df047060897b0cb002cbeefe6b26ae2312..3cd8d6856500ba50ca7e44317d110c41b0c33f55 100644
--- a/core/lib/Drupal/Component/Transliteration/PhpTransliteration.php
+++ b/core/lib/Drupal/Component/Transliteration/PhpTransliteration.php
@@ -44,7 +44,7 @@ class PhpTransliteration implements TransliterationInterface {
    *
    * @var array
    */
-  protected $languageOverrides = array();
+  protected $languageOverrides = [];
 
   /**
    * Non-language-specific transliteration tables.
@@ -56,7 +56,7 @@ class PhpTransliteration implements TransliterationInterface {
    *
    * @var array
    */
-  protected $genericMap = array();
+  protected $genericMap = [];
 
   /**
    * Constructs a transliteration object.
@@ -83,9 +83,9 @@ public function removeDiacritics($string) {
       // few characters that aren't accented letters mixed in. So define the
       // ranges and the excluded characters.
       $range1 = $code > 0x00bf && $code < 0x017f;
-      $exclusions_range1 = array(0x00d0, 0x00d7, 0x00f0, 0x00f7, 0x0138, 0x014a, 0x014b);
+      $exclusions_range1 = [0x00d0, 0x00d7, 0x00f0, 0x00f7, 0x0138, 0x014a, 0x014b];
       $range2 = $code > 0x01cc && $code < 0x0250;
-      $exclusions_range2 = array(0x01DD, 0x01f7, 0x021c, 0x021d, 0x0220, 0x0221, 0x0241, 0x0242, 0x0245);
+      $exclusions_range2 = [0x01DD, 0x01f7, 0x021c, 0x021d, 0x0220, 0x0221, 0x0241, 0x0242, 0x0245];
 
       $replacement = $character;
       if (($range1 && !in_array($code, $exclusions_range1)) || ($range2 && !in_array($code, $exclusions_range2))) {
@@ -246,7 +246,7 @@ protected function readLanguageOverrides($langcode) {
       include $file;
     }
     if (!isset($overrides) || !is_array($overrides)) {
-      $overrides = array($langcode => array());
+      $overrides = [$langcode => []];
     }
     $this->languageOverrides[$langcode] = $overrides[$langcode];
   }
@@ -274,7 +274,7 @@ protected function readGenericData($bank) {
       include $file;
     }
     if (!isset($base) || !is_array($base)) {
-      $base = array();
+      $base = [];
     }
 
     // Save this data.
diff --git a/core/lib/Drupal/Component/Transliteration/data/de.php b/core/lib/Drupal/Component/Transliteration/data/de.php
index a0b7e78a28a800a5073fef6df90dc8cb485aec96..49a08c51994387dd4a850cd38a07725c45fc27cf 100644
--- a/core/lib/Drupal/Component/Transliteration/data/de.php
+++ b/core/lib/Drupal/Component/Transliteration/data/de.php
@@ -5,11 +5,11 @@
  * German transliteration data for the PhpTransliteration class.
  */
 
-$overrides['de'] = array(
+$overrides['de'] = [
   0xC4 => 'Ae',
   0xD6 => 'Oe',
   0xDC => 'Ue',
   0xE4 => 'ae',
   0xF6 => 'oe',
   0xFC => 'ue',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/dk.php b/core/lib/Drupal/Component/Transliteration/data/dk.php
index 4a3056a5730c0473240136b12da1648bee8292d4..e46b013fd61ecfae8f5a5773c7e816438deae2b4 100644
--- a/core/lib/Drupal/Component/Transliteration/data/dk.php
+++ b/core/lib/Drupal/Component/Transliteration/data/dk.php
@@ -5,9 +5,9 @@
  * Danish transliteration data for the PhpTransliteration class.
  */
 
-$overrides['dk'] = array(
+$overrides['dk'] = [
   0xC5 => 'Aa',
   0xD8 => 'Oe',
   0xE5 => 'aa',
   0xF8 => 'oe',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/eo.php b/core/lib/Drupal/Component/Transliteration/data/eo.php
index 565af1902fe7d902e53f9c7e834955b311b21cc4..e115866b526ad71514f764e9556c3facbaeb9261 100644
--- a/core/lib/Drupal/Component/Transliteration/data/eo.php
+++ b/core/lib/Drupal/Component/Transliteration/data/eo.php
@@ -5,7 +5,7 @@
  * Esperanto transliteration data for the PhpTransliteration class.
  */
 
-$overrides['eo'] = array(
+$overrides['eo'] = [
   0x18 => 'Cx',
   0x19 => 'cx',
   0x11C => 'Gx',
@@ -18,4 +18,4 @@
   0x15D => 'sx',
   0x16C => 'Ux',
   0x16D => 'ux',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/kg.php b/core/lib/Drupal/Component/Transliteration/data/kg.php
index 1f8ad0596d4348ec728303801053cf305e6d11b4..549f075cec7ce78114b03d3066c364e3396e80f3 100644
--- a/core/lib/Drupal/Component/Transliteration/data/kg.php
+++ b/core/lib/Drupal/Component/Transliteration/data/kg.php
@@ -5,7 +5,7 @@
  * Kyrgyz transliteration data for the PhpTransliteration class.
  */
 
-$overrides['kg'] = array(
+$overrides['kg'] = [
   0x41 => 'E',
   0x416 => 'C',
   0x419 => 'J',
@@ -28,4 +28,4 @@
   0x4AF => 'w',
   0x4E8 => 'Q',
   0x4E9 => 'q',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x00.php b/core/lib/Drupal/Component/Transliteration/data/x00.php
index 8685680362ac5b550d72e40053c69118b18122ce..fd7c3f76ede05ad032dfa40f2fdae34346f9d20e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x00.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x00.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   // Note: to save memory plain ASCII mappings have been left out.
   0x80 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0x90 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
@@ -15,4 +15,4 @@
   0xD0 => 'D', 'N', 'O', 'O', 'O', 'O', 'O', '*', 'O', 'U', 'U', 'U', 'U', 'Y', 'TH', 'ss',
   0xE0 => 'a', 'a', 'a', 'a', 'a', 'a', 'ae', 'c', 'e', 'e', 'e', 'e', 'i', 'i', 'i', 'i',
   0xF0 => 'd', 'n', 'o', 'o', 'o', 'o', 'o', '/', 'o', 'u', 'u', 'u', 'u', 'y', 'th', 'y',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x01.php b/core/lib/Drupal/Component/Transliteration/data/x01.php
index 535692ac1307e6b59af0349bc70918e79700b237..a30aaa0e0e41db76f21b3d9b03990215ade9d643 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x01.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x01.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'A', 'a', 'A', 'a', 'A', 'a', 'C', 'c', 'C', 'c', 'C', 'c', 'C', 'c', 'D', 'd',
   0x10 => 'D', 'd', 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'G', 'g', 'G', 'g',
   0x20 => 'G', 'g', 'G', 'g', 'H', 'h', 'H', 'h', 'I', 'i', 'I', 'i', 'I', 'i', 'I', 'i',
@@ -22,4 +22,4 @@
   0xD0 => 'i', 'O', 'o', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', '@', 'A', 'a',
   0xE0 => 'A', 'a', 'AE', 'ae', 'G', 'g', 'G', 'g', 'K', 'k', 'O', 'o', 'O', 'o', 'ZH', 'zh',
   0xF0 => 'j', 'DZ', 'Dz', 'dz', 'G', 'g', 'HV', 'W', 'N', 'n', 'A', 'a', 'AE', 'ae', 'O', 'o',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x02.php b/core/lib/Drupal/Component/Transliteration/data/x02.php
index b57d54b7bcdb5cbdffb2be6c3d9bb1d82793cd6e..ba942070043a8e7e934664b7571ba5778ae7e9e1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x02.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x02.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'A', 'a', 'A', 'a', 'E', 'e', 'E', 'e', 'I', 'i', 'I', 'i', 'O', 'o', 'O', 'o',
   0x10 => 'R', 'r', 'R', 'r', 'U', 'u', 'U', 'u', 'S', 's', 'T', 't', 'Y', 'y', 'H', 'h',
   0x20 => 'N', 'd', 'OU', 'ou', 'Z', 'z', 'A', 'a', 'E', 'e', 'O', 'o', 'O', 'o', 'O', 'o',
@@ -22,4 +22,4 @@
   0xD0 => ':', '.', '`', '\'', '^', 'V', '+', '-', 'V', '.', '@', ',', '~', '"', 'R', 'X',
   0xE0 => 'G', 'l', 's', 'x', '?', '', '', '', '', '', '', '', 'V', '=', '"', NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x03.php b/core/lib/Drupal/Component/Transliteration/data/x03.php
index 098428123db3837700001b93f13c2ebcab8d79b3..f61602d2eb3aa25a1c5ccf33b1813c39fff7a208 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x03.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x03.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0x10 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0x20 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
@@ -22,4 +22,4 @@
   0xD0 => 'b', 'th', 'Y', 'Y', 'Y', 'ph', 'p', '&', NULL, NULL, 'St', 'st', 'W', 'w', 'Q', 'q',
   0xE0 => 'Sp', 'sp', 'Sh', 'sh', 'F', 'f', 'Kh', 'kh', 'H', 'h', 'G', 'g', 'CH', 'ch', 'Ti', 'ti',
   0xF0 => 'k', 'r', 's', 'j', 'TH', 'e', NULL, 'S', 's', 'S', 'S', 's', NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x04.php b/core/lib/Drupal/Component/Transliteration/data/x04.php
index a8fee7da73eb2f8702ec23cc5e8803a44b79caed..1be0d433249362abe01c31da0568fe995604f2f8 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x04.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x04.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'E', 'E', 'D', 'G', 'E', 'Z', 'I', 'I', 'J', 'L', 'N', 'C', 'K', 'I', 'U', 'D',
   0x10 => 'A', 'B', 'V', 'G', 'D', 'E', 'Z', 'Z', 'I', 'I', 'K', 'L', 'M', 'N', 'O', 'P',
   0x20 => 'R', 'S', 'T', 'U', 'F', 'H', 'C', 'C', 'S', 'S', '', 'Y', '', 'E', 'U', 'A',
@@ -22,4 +22,4 @@
   0xD0 => 'A', 'a', 'A', 'a', 'AE', 'ae', 'E', 'e', '@', '@', '@', '@', 'Z', 'z', 'Z', 'z',
   0xE0 => 'Dz', 'dz', 'I', 'i', 'I', 'i', 'O', 'o', 'O', 'o', 'O', 'o', 'E', 'e', 'U', 'u',
   0xF0 => 'U', 'u', 'U', 'u', 'C', 'c', NULL, NULL, 'Y', 'y', NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x05.php b/core/lib/Drupal/Component/Transliteration/data/x05.php
index 29b523226dac61bc6160337666ca6740b700ff3a..f39fa5b46001a6b7eed46f88eee95bcacfa881dd 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x05.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x05.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => '', 'b', 'g', 'd', 'h', 'w', 'z', 'h', 't', 'y', 'k', 'k', 'l', 'm', 'm', 'n',
   0xE0 => 'n', 's', '`', 'p', 'p', 'z', 'z', 'q', 'r', 's', 't', NULL, NULL, NULL, NULL, NULL,
   0xF0 => 'ww', 'wy', 'yy', '\'', '"', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x06.php b/core/lib/Drupal/Component/Transliteration/data/x06.php
index 68ea125b705dac9a673edb52a3be1c43d47252bf..6999d90c70dc7d75ed924d3a21cd6f9888121dc3 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x06.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x06.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, ',', NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, ';', NULL, NULL, NULL, '?',
   0x20 => NULL, '', 'a', 'a', 'w', 'a', 'y', 'a', 'b', 't', 't', 'th', 'j', 'h', 'kh', 'd',
@@ -22,4 +22,4 @@
   0xD0 => '', '', 'y', 'y\'', '.', 'ae', '', '', '', '', '', '', '', '@', '#', '',
   0xE0 => '', '', '', '', '', '', '', '', '', '^', '', '', '', '', NULL, NULL,
   0xF0 => '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'Sh', 'D', 'Gh', '&', '+m', NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x07.php b/core/lib/Drupal/Component/Transliteration/data/x07.php
index c141b66b329f3254d87aa10eb2ea3d0c37653b8f..35873139c2d9ecab340f4d500598754b0e4cdc77 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x07.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x07.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => '//', '/', ',', '!', '!', '-', ',', ',', ';', '?', '~', '{', '}', '*', NULL, '',
   0x10 => '\'', '', 'b', 'g', 'g', 'd', 'dr', 'h', 'w', 'z', 'h', 't', 't', 'y', 'yh', 'k',
   0x20 => 'l', 'm', 'n', 's', 's', '`', 'p', 'p', 's', 'q', 'r', 'sh', 't', NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x09.php b/core/lib/Drupal/Component/Transliteration/data/x09.php
index 88c28451d6cb122a7c5bf7eb6df42b83de9596f2..6250925d87356c77b0b100fe848fc309ef36bf56 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x09.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x09.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, 'N', 'N', 'h', NULL, 'a', 'a', 'i', 'i', 'u', 'u', 'r', 'l', 'e', 'e', 'e',
   0x10 => 'ai', 'o', 'o', 'o', 'au', 'ka', 'kha', 'ga', 'gha', 'na', 'ca', 'cha', 'ja', 'jha', 'na', 'ta',
   0x20 => 'tha', 'da', 'dha', 'na', 'ta', 'tha', 'da', 'dha', 'na', 'na', 'pa', 'pha', 'ba', 'bha', 'ma', 'ya',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, '+', NULL, NULL, NULL, NULL, 'da', 'dha', NULL, 'ya',
   0xE0 => 'r', 'l', 'L', 'LL', NULL, NULL, '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   0xF0 => 'ra', 'ra', 'Rs', 'Rs', '1/', '2/', '3/', '4/', ' 1 - 1/', '/16', '', NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x0a.php b/core/lib/Drupal/Component/Transliteration/data/x0a.php
index 5d14d3f4a8e827d39f6618fbd2a508fbe8bf6300..0dc613f364776232611a2a1850b98c8de9789b6c 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x0a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x0a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, 'N', NULL, NULL, 'a', 'a', 'i', 'i', 'u', 'u', NULL, NULL, NULL, NULL, 'e',
   0x10 => 'ai', NULL, NULL, 'o', 'au', 'ka', 'kha', 'ga', 'gha', 'na', 'ca', 'cha', 'ja', 'jha', 'na', 'ta',
   0x20 => 'tha', 'da', 'dha', 'na', 'ta', 'tha', 'da', 'dha', 'na', NULL, 'pa', 'pha', 'ba', 'bha', 'ma', 'ya',
@@ -22,4 +22,4 @@
   0xD0 => '\'om', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => 'r', 'l', NULL, NULL, NULL, NULL, '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x0b.php b/core/lib/Drupal/Component/Transliteration/data/x0b.php
index e700c6d864baa04262d9fbdb557c8fb4f749751d..2f95b1bb0ce30d39fd4a3613d7e6de04b21f0ef1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x0b.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x0b.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, 'N', 'm', 'h', NULL, 'a', 'a', 'i', 'i', 'u', 'u', 'r', 'l', NULL, NULL, 'e',
   0x10 => 'ai', NULL, NULL, 'o', 'au', 'ka', 'kha', 'ga', 'gha', 'na', 'ca', 'cha', 'ja', 'jha', 'na', 'ta',
   0x20 => 'tha', 'da', 'dha', 'na', 'ta', 'tha', 'da', 'dha', 'na', NULL, 'pa', 'pha', 'ba', 'bha', 'ma', 'ya',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, '+', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   0xF0 => '10', '100', '1000', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x0c.php b/core/lib/Drupal/Component/Transliteration/data/x0c.php
index 51f7f50b7552307e0a42f406d5bc9b1511fe7a74..1638bfdde05835feffba94567326ede68a3ded36 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x0c.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x0c.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, 'm', 'm', 'h', NULL, 'a', 'a', 'i', 'i', 'u', 'u', 'r', 'l', NULL, 'e', 'e',
   0x10 => 'ai', NULL, 'o', 'o', 'au', 'ka', 'kha', 'ga', 'gha', 'na', 'ca', 'cha', 'ja', 'jha', 'na', 'ta',
   0x20 => 'tha', 'da', 'dha', 'na', 'ta', 'tha', 'da', 'dha', 'na', NULL, 'pa', 'pha', 'ba', 'bha', 'ma', 'ya',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, '+', '+', NULL, NULL, NULL, NULL, NULL, NULL, NULL, 'la', NULL,
   0xE0 => 'r', 'l', NULL, NULL, NULL, NULL, '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x0d.php b/core/lib/Drupal/Component/Transliteration/data/x0d.php
index d92a68ce66e340936d0ead130499102f40964687..8aa517b743d1e437f782b79ecf42c89997cebd1e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x0d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x0d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, 'm', 'h', NULL, 'a', 'a', 'i', 'i', 'u', 'u', 'r', 'l', NULL, 'e', 'e',
   0x10 => 'ai', NULL, 'o', 'o', 'au', 'ka', 'kha', 'ga', 'gha', 'na', 'ca', 'cha', 'ja', 'jha', 'na', 'ta',
   0x20 => 'tha', 'da', 'dha', 'na', 'ta', 'tha', 'da', 'dha', 'na', NULL, 'pa', 'pha', 'ba', 'bha', 'ma', 'ya',
@@ -22,4 +22,4 @@
   0xD0 => 'ae', 'aae', 'i', 'ii', 'u', NULL, 'uu', NULL, 'R', 'e', 'ee', 'ai', 'o', 'oo', 'au', 'L',
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, 'RR', 'LL', ' . ', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x0e.php b/core/lib/Drupal/Component/Transliteration/data/x0e.php
index 03fb5a95885cf4bbd8f72befca11177fc8c22146..13a589d904c98d99f32084eb7b1508e095bd543d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x0e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x0e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, 'k', 'kh', 'kh', 'kh', 'kh', 'kh', 'ng', 'c', 'ch', 'ch', 's', 'ch', 'y', 'd', 't',
   0x10 => 'th', 'th', 'th', 'n', 'd', 't', 'th', 'th', 'th', 'n', 'b', 'p', 'ph', 'f', 'ph', 'f',
   0x20 => 'ph', 'm', 'y', 'r', 'v', 'l', 'l', 'w', 's', 's', 's', 'h', 'l', 'x', 'h', '~',
@@ -22,4 +22,4 @@
   0xD0 => '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', NULL, NULL, 'hn', 'hm', NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x0f.php b/core/lib/Drupal/Component/Transliteration/data/x0f.php
index addfa7501fe8b5cb2a56ef1c0d4ceb5486fdd1ce..32262e53a61299d3e77ca4c7dcac21dc42097b76 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x0f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x0f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'AUM', '', '', '', '', '', '', '', ' // ', ' * ', '', '-', ' / ', ' / ', ' // ', ' -/ ',
   0x10 => ' +/ ', ' X/ ', ' /XX/ ', ' /X/ ', ',', '', '', '', '', '', '', '', '', '', '', '',
   0x20 => '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.5', '1.5', '2.5', '3.5', '4.5', '5.5',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x10.php b/core/lib/Drupal/Component/Transliteration/data/x10.php
index 9aedcce80bd7a153aaca219f284561450e0a273c..cb1b13dce0f3f3dd901a31978c5c533de1c90579 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x10.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x10.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'k', 'kh', 'g', 'gh', 'ng', 'c', 'ch', 'j', 'jh', 'ny', 'nny', 'tt', 'tth', 'dd', 'ddh', 'nn',
   0x10 => 'tt', 'th', 'd', 'dh', 'n', 'p', 'ph', 'b', 'bh', 'm', 'y', 'r', 'l', 'w', 's', 'h',
   0x20 => 'll', 'a', NULL, 'i', 'ii', 'u', 'uu', 'e', NULL, 'o', 'au', NULL, 'aa', 'i', 'ii', 'u',
@@ -22,4 +22,4 @@
   0xD0 => 'a', 'b', 'g', 'd', 'e', 'v', 'z', 't', 'i', 'k', 'l', 'm', 'n', 'o', 'p', 'zh',
   0xE0 => 'r', 's', 't', 'u', 'p', 'k', 'gh', 'q', 'sh', 'ch', 'ts', 'dz', 'c', 'ch', 'kh', 'j',
   0xF0 => 'h', 'e', 'y', 'ui', 'q', 'oe', 'f', NULL, NULL, NULL, NULL, ' // ', NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x11.php b/core/lib/Drupal/Component/Transliteration/data/x11.php
index 66d2fe6776f3876f4ea3f4d928bf046f0d913419..bf1a13e609ea47d3a7d30f1b18a20eae80bf1846 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x11.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x11.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'g', 'kk', 'n', 'd', 'tt', 'l', 'm', 'b', 'pp', 's', 'ss', '', 'j', 'jj', 'ch', 'k',
   0x10 => 't', 'p', 'h', 'ng', 'nn', 'nd', 'nb', 'dg', 'rn', 'rr', 'rh', 'rN', 'mb', 'mN', 'bg', 'bn',
   0x20 => '', 'bs', 'bsg', 'bst', 'bsb', 'bss', 'bsj', 'bj', 'bc', 'bt', 'bp', 'bN', 'bbN', 'sg', 'sn', 'sd',
@@ -22,4 +22,4 @@
   0xD0 => 'll', 'lmg', 'lms', 'lbs', 'lbh', 'rNp', 'lss', 'lZ', 'lk', 'lQ', 'mg', 'ml', 'mb', 'ms', 'mss', 'mZ',
   0xE0 => 'mc', 'mh', 'mN', 'bl', 'bp', 'ph', 'pN', 'sg', 'sd', 'sl', 'sb', 'Z', 'g', 'ss', '', 'kh',
   0xF0 => 'N', 'Ns', 'NZ', 'pb', 'pN', 'hn', 'hl', 'hm', 'hb', 'Q', NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x12.php b/core/lib/Drupal/Component/Transliteration/data/x12.php
index 1248209ef9e2c440f65ebdfc43246fc07bd23402..43fdd369aacdfbfd0a02484c511e1b11977dd045 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x12.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x12.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ha', 'hu', 'hi', 'haa', 'hee', 'he', 'ho', NULL, 'la', 'lu', 'li', 'laa', 'lee', 'le', 'lo', 'lwa',
   0x10 => 'hha', 'hhu', 'hhi', 'hhaa', 'hhee', 'hhe', 'hho', 'hhwa', 'ma', 'mu', 'mi', 'maa', 'mee', 'me', 'mo', 'mwa',
   0x20 => 'sza', 'szu', 'szi', 'szaa', 'szee', 'sze', 'szo', 'szwa', 'ra', 'ru', 'ri', 'raa', 'ree', 're', 'ro', 'rwa',
@@ -22,4 +22,4 @@
   0xD0 => '`a', '`u', '`i', '`aa', '`ee', '`e', '`o', NULL, 'za', 'zu', 'zi', 'zaa', 'zee', 'ze', 'zo', 'zwa',
   0xE0 => 'zha', 'zhu', 'zhi', 'zhaa', 'zhee', 'zhe', 'zho', 'zhwa', 'ya', 'yu', 'yi', 'yaa', 'yee', 'ye', 'yo', NULL,
   0xF0 => 'da', 'du', 'di', 'daa', 'dee', 'de', 'do', 'dwa', 'dda', 'ddu', 'ddi', 'ddaa', 'ddee', 'dde', 'ddo', 'ddwa',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x13.php b/core/lib/Drupal/Component/Transliteration/data/x13.php
index 73976a8e941e5b9a0928edc03946b9e14b99bf95..a6a593605a6280d7dd6a96623add335240d73922 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x13.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x13.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ja', 'ju', 'ji', 'jaa', 'jee', 'je', 'jo', 'jwa', 'ga', 'gu', 'gi', 'gaa', 'gee', 'ge', 'go', NULL,
   0x10 => 'gwa', NULL, 'gwi', 'gwaa', 'gwee', 'gwe', NULL, NULL, 'gga', 'ggu', 'ggi', 'ggaa', 'ggee', 'gge', 'ggo', NULL,
   0x20 => 'tha', 'thu', 'thi', 'thaa', 'thee', 'the', 'tho', 'thwa', 'cha', 'chu', 'chi', 'chaa', 'chee', 'che', 'cho', 'chwa',
@@ -22,4 +22,4 @@
   0xD0 => 'so', 'su', 'sv', 'da', 'ta', 'de', 'te', 'di', 'ti', 'do', 'du', 'dv', 'dla', 'tla', 'tle', 'tli',
   0xE0 => 'tlo', 'tlu', 'tlv', 'tsa', 'tse', 'tsi', 'tso', 'tsu', 'tsv', 'wa', 'we', 'wi', 'wo', 'wu', 'wv', 'ya',
   0xF0 => 'ye', 'yi', 'yo', 'yu', 'yv', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x14.php b/core/lib/Drupal/Component/Transliteration/data/x14.php
index 8b4995e577751ca910444e83aad72ec41e885091..e752a070285c0678b9af65762bf534eff5d70d98 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x14.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x14.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, 'ai', 'aai', 'i', 'ii', 'u', 'uu', 'oo', 'ee', 'i', 'a', 'aa', 'we', 'we', 'wi', 'wi',
   0x10 => 'wii', 'wii', 'wo', 'wo', 'woo', 'woo', 'woo', 'wa', 'wa', 'waa', 'waa', 'waa', 'ai', 'w', '\'', 't',
   0x20 => 'k', 'sh', 's', 'n', 'w', 'n', NULL, 'w', 'c', '?', 'l', 'en', 'in', 'on', 'an', 'pai',
@@ -22,4 +22,4 @@
   0xD0 => 'n', 'ng', 'nh', 'lai', 'laai', 'li', 'lii', 'lu', 'luu', 'loo', 'la', 'laa', 'lwe', 'lwe', 'lwi', 'lwi',
   0xE0 => 'lwii', 'lwii', 'lwo', 'lwo', 'lwoo', 'lwoo', 'lwa', 'lwa', 'lwaa', 'lwaa', 'l', 'l', 'l', 'sai', 'saai', 'si',
   0xF0 => 'sii', 'su', 'suu', 'soo', 'sa', 'saa', 'swe', 'swe', 'swi', 'swi', 'swii', 'swii', 'swo', 'swo', 'swoo', 'swoo',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x15.php b/core/lib/Drupal/Component/Transliteration/data/x15.php
index e40fc68b46d4e0c1f06a861011107cce73087cd6..426578393f696899d6ebd73d34bc0211b864e6eb 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x15.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x15.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'swa', 'swa', 'swaa', 'swaa', 'swaa', 's', 's', 'sw', 's', 'sk', 'skw', 'sW', 'spwa', 'stwa', 'skwa', 'scwa',
   0x10 => 'she', 'shi', 'shii', 'sho', 'shoo', 'sha', 'shaa', 'shwe', 'shwe', 'shwi', 'shwi', 'shwii', 'shwii', 'shwo', 'shwo', 'shwoo',
   0x20 => 'shwoo', 'shwa', 'shwa', 'shwaa', 'shwaa', 'sh', 'jai', 'yaai', 'ji', 'jii', 'ju', 'juu', 'yoo', 'ja', 'jaa', 'ywe',
@@ -22,4 +22,4 @@
   0xD0 => 'wu', 'wo', 'we', 'wee', 'wi', 'wa', 'hwu', 'hwo', 'hwe', 'hwee', 'hwi', 'hwa', 'thu', 'tho', 'the', 'thee',
   0xE0 => 'thi', 'tha', 'ttu', 'tto', 'tte', 'ttee', 'tti', 'tta', 'pu', 'po', 'pe', 'pee', 'pi', 'pa', 'p', 'gu',
   0xF0 => 'go', 'ge', 'gee', 'gi', 'ga', 'khu', 'kho', 'khe', 'khee', 'khi', 'kha', 'kku', 'kko', 'kke', 'kkee', 'kki',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x16.php b/core/lib/Drupal/Component/Transliteration/data/x16.php
index 9d977475dd70738017e67a5c130efee4568e5a11..dbb3d60b365fc8d12622d2e678d2e45d8b04f635 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x16.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x16.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'kka', 'kk', 'nu', 'no', 'ne', 'nee', 'ni', 'na', 'mu', 'mo', 'me', 'mee', 'mi', 'ma', 'yu', 'yo',
   0x10 => 'ye', 'yee', 'yi', 'ya', 'ju', 'ju', 'jo', 'je', 'jee', 'ji', 'ji', 'ja', 'jju', 'jjo', 'jje', 'jjee',
   0x20 => 'jji', 'jja', 'lu', 'lo', 'le', 'lee', 'li', 'la', 'dlu', 'dlo', 'dle', 'dlee', 'dli', 'dla', 'lhu', 'lho',
@@ -22,4 +22,4 @@
   0xD0 => 't', 'd', 'b', 'b', 'p', 'p', 'e', 'm', 'm', 'm', 'l', 'l', 'ng', 'ng', 'd', 'o',
   0xE0 => 'ear', 'ior', 'qu', 'qu', 'qu', 's', 'yr', 'yr', 'yr', 'q', 'x', '.', ':', '+', '17', '18',
   0xF0 => '19', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x17.php b/core/lib/Drupal/Component/Transliteration/data/x17.php
index f98d03a7d8feb960caea2b4445c6ec1ba576ddc4..f08a09d65d6f1d775e44ec497bed93657f3add0b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x17.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x17.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => '', '', '', '', '.', ' // ', ':', '+', '++', ' * ', ' /// ', 'KR', '\'', NULL, NULL, NULL,
   0xE0 => '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x18.php b/core/lib/Drupal/Component/Transliteration/data/x18.php
index 05c85a49731b9f441ab5751800a58206efe84667..b46d30df8b2cd68ad9b0481d59c6211bf57f0a98 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x18.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x18.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => ' @ ', ' ... ', ',', '. ', ': ', ' // ', '', '-', ',', '. ', '', '', '', '', '', NULL,
   0x10 => '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => 'a', 'e', 'i', 'o', 'u', 'O', 'U', 'ee', 'n', 'ng', 'b', 'p', 'q', 'g', 'm', 'l',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x1d.php b/core/lib/Drupal/Component/Transliteration/data/x1d.php
index ab6b5d4cf52b57088f908fce2af83404d0621372..1d6bacfd6ef384d925e341dd7524e0beed5f85bc 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x1d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x1d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'A', 'AE', NULL, 'B', 'C', 'D', 'D', 'E', NULL, NULL, 'J', 'K', 'L', 'M', NULL, 'O',
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 'P', NULL, NULL, 'T', 'U', NULL, NULL, NULL,
   0x20 => 'V', 'W', 'Z', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x1e.php b/core/lib/Drupal/Component/Transliteration/data/x1e.php
index 71b45bb9c66bb95ab3e9c3e5e8e6e951ace4da96..592deec3360bbe984a9c0c565388d7b368e48ada 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x1e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x1e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'A', 'a', 'B', 'b', 'B', 'b', 'B', 'b', 'C', 'c', 'D', 'd', 'D', 'd', 'D', 'd',
   0x10 => 'D', 'd', 'D', 'd', 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'F', 'f',
   0x20 => 'G', 'g', 'H', 'h', 'H', 'h', 'H', 'h', 'H', 'h', 'H', 'h', 'I', 'i', 'I', 'i',
@@ -22,4 +22,4 @@
   0xD0 => 'O', 'o', 'O', 'o', 'O', 'o', 'O', 'o', 'O', 'o', 'O', 'o', 'O', 'o', 'O', 'o',
   0xE0 => 'O', 'o', 'O', 'o', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u',
   0xF0 => 'U', 'u', 'Y', 'y', 'Y', 'y', 'Y', 'y', 'Y', 'y', 'LL', 'll', 'V', 'v', 'Y', 'y',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x1f.php b/core/lib/Drupal/Component/Transliteration/data/x1f.php
index 9e0a60ebf8a1d2a213d6bfac7c1bb9aa34736057..33fa4bcf0bafbe6c79c67bb92009fa429d82b9e1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x1f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x1f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'A', 'A', 'A', 'A', 'A', 'A', 'A', 'A',
   0x10 => 'e', 'e', 'e', 'e', 'e', 'e', NULL, NULL, 'E', 'E', 'E', 'E', 'E', 'E', NULL, NULL,
   0x20 => 'e', 'e', 'e', 'e', 'e', 'e', 'e', 'e', 'E', 'E', 'E', 'E', 'E', 'E', 'E', 'E',
@@ -22,4 +22,4 @@
   0xD0 => 'i', 'i', 'i', 'i', NULL, NULL, 'i', 'i', 'I', 'I', 'I', 'I', NULL, '`\'', '`\'', '`~',
   0xE0 => 'y', 'y', 'y', 'y', 'r', 'r', 'y', 'y', 'Y', 'Y', 'Y', 'Y', 'R', '"`', '"\'', '`',
   0xF0 => NULL, NULL, 'o', 'o', 'o', NULL, 'o', 'o', 'O', 'O', 'O', 'O', 'O', '\'', '`', NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x20.php b/core/lib/Drupal/Component/Transliteration/data/x20.php
index e1069537a5fe2b5ebb6d4bedabbe17d22833dcff..a556d497eeb40f365d4f52b66d79735ddcf07207 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x20.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x20.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '', '', '', '',
   0x10 => '-', '-', '-', '-', '-', '-', '||', '_', '\'', '\'', ',', '\'', '"', '"', ',,', '"',
   0x20 => '+', '++', '*', '*>', '.', '..', '...', '.', '
@@ -25,4 +25,4 @@
   0xD0 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0xE0 => '', '', '', '', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x21.php b/core/lib/Drupal/Component/Transliteration/data/x21.php
index 1da0f418f49fcd33a2f8e5e238b4f12a67d764a5..44645a92b47994aea1917d1f9485f231200747d6 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x21.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x21.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'a/c', 'a/s', 'C', '', '', 'c/o', 'c/u', '', '', '', 'g', 'H', 'x', 'H', 'h', '',
   0x10 => 'I', 'I', 'L', 'l', 'lb', 'N', 'No', '(p)', 'P', 'P', 'Q', 'R', 'R', 'R', 'Rx', '',
   0x20 => '(sm)', 'TEL', '(tm)', '', 'Z', '', 'O', 'mho', 'Z', '', 'K', 'A', 'B', 'C', 'e', 'e',
@@ -22,4 +22,4 @@
   0xD0 => '=', '|', '=', '|', '=', '|', '\\', '/', '\\', '/', '=', '=', '~', '~', '|', '|',
   0xE0 => '-', '|', '-', '|', '-', '-', '-', '|', '-', '|', '|', '|', '|', '|', '|', '|',
   0xF0 => '-', '\\', '\\', '|', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x22.php b/core/lib/Drupal/Component/Transliteration/data/x22.php
index e346ffbbe996909572b0cf3b8ca03337f26f8c57..fa289784e855b74b6459f5601bd9c3a9590a34d5 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x22.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x22.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => NULL, NULL, '-', NULL, NULL, '/', '\\', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => NULL, NULL, NULL, '|', '|', '||', '||', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x23.php b/core/lib/Drupal/Component/Transliteration/data/x23.php
index 3cef84f96e5507290629cde94fdab84489475eba..e38c438e5286539d4d827514a0369a0efc315909 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x23.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x23.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, '<', '>', NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x24.php b/core/lib/Drupal/Component/Transliteration/data/x24.php
index 3e7b33bffb80bf8145e16f74dbd774b4e3a547f4..17ffeee58e9d2e79c422f819ea8b8f598e93744f 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x24.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x24.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0x10 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0x20 => '', '', '', '', '', '', '', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0xE0 => '', '', '', '', '', '', '', '', '', '', '', NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x25.php b/core/lib/Drupal/Component/Transliteration/data/x25.php
index 786bfceaa553b928c62d1a2e4bc888f801c9f2b8..b24b056ade0fa5af16349ecccb502ff3468f516a 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x25.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x25.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => '-', '-', '|', '|', '-', '-', '|', '|', '-', '-', '|', '|', '+', '+', '+', '+',
   0x10 => '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+',
   0x20 => '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+', '+',
@@ -22,4 +22,4 @@
   0xD0 => '*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
   0xE0 => '*', '*', '*', '*', '*', '*', '*', '#', '#', '#', '#', '#', '^', '^', '^', 'O',
   0xF0 => '#', '#', '#', '#', '#', '#', '#', '#', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x26.php b/core/lib/Drupal/Component/Transliteration/data/x26.php
index c7dc40694867786aea43cefb3151db7787e8c55a..3ef34ee6586185208c45c8061da83d481ef71834 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x26.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x26.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0x10 => '', '', '', '', NULL, NULL, NULL, NULL, NULL, '', '', '', '', '', '', '',
   0x20 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x27.php b/core/lib/Drupal/Component/Transliteration/data/x27.php
index 9c001d283331d550470bb54ec087e923e07658ff..f067a78b9758cdc4fb6118d04fd504cb6ed8d002 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x27.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x27.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0x10 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
   0x20 => '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x28.php b/core/lib/Drupal/Component/Transliteration/data/x28.php
index 456f8e41c2202f25ea66deee1c8529f688839996..ce1789d4f9cf577a3f12057c712cc257989c5cac 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x28.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x28.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => ' ', 'a', '1', 'b', '\'', 'k', '2', 'l', '@', 'c', 'i', 'f', '/', 'm', 's', 'p',
   0x10 => '"', 'e', '3', 'h', '9', 'o', '6', 'r', '^', 'd', 'j', 'g', '>', 'n', 't', 'q',
   0x20 => ',', '*', '5', '<', '-', 'u', '8', 'v', '.', '%', '[', '$', '+', 'x', '!', '&',
@@ -22,4 +22,4 @@
   0xD0 => '[d578]', '[d1578]', '[d2578]', '[d12578]', '[d3578]', '[d13578]', '[d23578]', '[d123578]', '[d4578]', '[d14578]', '[d24578]', '[d124578]', '[d34578]', '[d134578]', '[d234578]', '[d1234578]',
   0xE0 => '[d678]', '[d1678]', '[d2678]', '[d12678]', '[d3678]', '[d13678]', '[d23678]', '[d123678]', '[d4678]', '[d14678]', '[d24678]', '[d124678]', '[d34678]', '[d134678]', '[d234678]', '[d1234678]',
   0xF0 => '[d5678]', '[d15678]', '[d25678]', '[d125678]', '[d35678]', '[d135678]', '[d235678]', '[d1235678]', '[d45678]', '[d145678]', '[d245678]', '[d1245678]', '[d345678]', '[d1345678]', '[d2345678]', '[d12345678]',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x29.php b/core/lib/Drupal/Component/Transliteration/data/x29.php
index 98390e61a491fd1618f097a674a161bf27ca0598..cd18ef9505dc01300c7440e7652b2d41a1ccb434 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x29.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x29.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x2a.php b/core/lib/Drupal/Component/Transliteration/data/x2a.php
index 93349c59461d58fde4c739d0fc02cb2b2ee3649a..24013a35d1bece79c9b9d4ee246ce9a152f2481b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x2a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x2a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x2e.php b/core/lib/Drupal/Component/Transliteration/data/x2e.php
index f9b3b3333d07021e0b0741e81204b21cdd7e841e..e62f56a1deaedd9cdd42cadae8c9cd162f5b1bf4 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x2e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x2e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => 'jin', 'chang', 'chang', 'zhang', 'men', NULL, 'fu', 'yu', 'qing', 'wei', 'ye', 'feng', 'fei', 'shi', NULL, 'shi',
   0xE0 => 'shi', NULL, 'ma', 'gu', 'gui', 'yu', 'niao', 'lu', 'mai', 'huang', 'mian', 'qi', 'qi', 'chi', 'chi', 'long',
   0xF0 => 'long', 'gui', 'gui', 'gui', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x2f.php b/core/lib/Drupal/Component/Transliteration/data/x2f.php
index a5e702928d24d98263f2cd4bbde9085e5b346c64..ecf6f0b4cf563147e84e2993d5359d5239157986 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x2f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x2f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yi', 'gun', 'zhu', 'pie', 'yi', 'jue', 'er', 'tou', 'ren', 'er', 'ru', 'ba', 'jiong', 'mi', 'bing', 'ji',
   0x10 => 'qian', 'dao', 'li', 'bao', 'bi', 'fang', 'xi', 'shi', 'bo', 'jie', 'chang', 'si', 'you', 'kou', 'wei', 'tu',
   0x20 => 'shi', 'zhi', 'sui', 'xi', 'da', 'nu', 'zi', 'mian', 'cun', 'xiao', 'you', 'shi', 'che', 'shan', 'chuan', 'gong',
@@ -22,4 +22,4 @@
   0xD0 => 'bi', 'qi', 'chi', 'long', 'gui', 'yue', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x30.php b/core/lib/Drupal/Component/Transliteration/data/x30.php
index c92c0a6518f968ebc98a4363a7bb2c6aba98be09..3fe856787ba95d2c543c604cb632d7ccf019a85a 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x30.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x30.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => ' ', ',', '.', '"', '[JIS]', '"', '/', 'ling', '<', '>', '<<', '>>', '[', '] ', '{', '} ',
   0x10 => '[(', ')] ', '@', 'X ', '[', ']', '[[', ']] ', '[', ']', '[', ']', '~ ', '"', '"', ',,',
   0x20 => '@', '1', '2', '3', '4', '5', '6', '7', '8', '9', '', '', '', '', '', '',
@@ -22,4 +22,4 @@
   0xD0 => 'ha', 'ha', 'hi', 'hi', 'hi', 'fu', 'fu', 'fu', 'he', 'he', 'he', 'ho', 'ho', 'ho', 'ma', 'mi',
   0xE0 => 'mu', 'me', 'mo', '~ya', 'ya', '~yu', 'yu', '~yo', 'yo', 'ra', 'ri', 'ru', 're', 'ro', '~wa', 'wa',
   0xF0 => 'wi', 'we', 'wo', 'n', 'u', '~ka', '~ke', 'wa', 'wi', 'we', 'wo', '', '', '"', '"', NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x31.php b/core/lib/Drupal/Component/Transliteration/data/x31.php
index 95b59f4a2ef7fe980d3498818e3b080cba9332c1..59ceddec64520cc7a1eedf3da825a121a22a6aaa 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x31.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x31.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, 'b', 'p', 'm1', 'f', 'd', 't', 'n1', 'l', 'g', 'k', 'h',
   0x10 => 'j', 'q', 'x', 'zhi1', 'chi1', 'shi1', 'ri1', 'zi1', 'ci1', 'si1', 'a1', 'o1', 'e1', 'eh1', 'ai1', 'ei1',
   0x20 => 'ao1', 'ou1', 'an1', 'en1', 'ang1', 'eng1', 'er1', 'yi1', 'wu1', 'yu1', 'V', 'NG', 'GN', NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x32.php b/core/lib/Drupal/Component/Transliteration/data/x32.php
index 25cc5f3e690815461a40924cdfc2986df4ed3e4e..20ffe76659eb12f78cc9f3205af958590e94b705 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x32.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x32.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => '(g)', '(n)', '(d)', '(l)', '(m)', '(b)', '(s)', '()', '(j)', '(ch)', '(k)', '(t)', '(p)', '(h)', '(ga)', '(na)',
   0x10 => '(da)', '(la)', '(ma)', '(ba)', '(sa)', '(a)', '(ja)', '(cha)', '(ka)', '(ta)', '(pa)', '(ha)', '(ju)', NULL, NULL, NULL,
   0x20 => '(1) ', '(2) ', '(3) ', '(4) ', '(5) ', '(6) ', '(7) ', '(8) ', '(9) ', '(10) ', '(Yue) ', '(Huo) ', '(Shui) ', '(Mu) ', '(Jin) ', '(Tu) ',
@@ -22,4 +22,4 @@
   0xD0 => 'a', 'i', 'u', 'u', 'o', 'ka', 'ki', 'ku', 'ke', 'ko', 'sa', 'si', 'su', 'se', 'so', 'ta',
   0xE0 => 'ti', 'tu', 'te', 'to', 'na', 'ni', 'nu', 'ne', 'no', 'ha', 'hi', 'hu', 'he', 'ho', 'ma', 'mi',
   0xF0 => 'mu', 'me', 'mo', 'ya', 'yu', 'yo', 'ra', 'ri', 'ru', 're', 'ro', 'wa', 'wi', 'we', 'wo', NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x33.php b/core/lib/Drupal/Component/Transliteration/data/x33.php
index 8094290fc75d226157c3ba36a0e81b031c130c64..9eae1281329010f8c594e587b18d8f34042edf3d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x33.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x33.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'apartment', 'alpha', 'ampere', 'are', 'inning', 'inch', 'won', 'escudo', 'acre', 'ounce', 'ohm', 'kai-ri', 'carat', 'calorie', 'gallon', 'gamma',
   0x10 => 'giga', 'guinea', 'curie', 'guilder', 'kilo', 'kilogram', 'kilometer', 'kilowatt', 'gram', 'gram ton', 'cruzeiro', 'krone', 'case', 'koruna', 'co-op', 'cycle',
   0x20 => 'centime', 'shilling', 'centi', 'cent', 'dozen', 'desi', 'dollar', 'ton', 'nano', 'knot', 'heights', 'percent', 'parts', 'barrel', 'piaster', 'picul',
@@ -22,4 +22,4 @@
   0xD0 => 'lm', 'ln', 'log', 'lx', 'mb', 'mil', 'mol', 'pH', 'p.m.', 'PPM', 'PR', 'sr', 'Sv', 'Wb', 'V/m', 'A/m',
   0xE0 => '1d', '2d', '3d', '4d', '5d', '6d', '7d', '8d', '9d', '10d', '11d', '12d', '13d', '14d', '15d', '16d',
   0xF0 => '17d', '18d', '19d', '20d', '21d', '22d', '23d', '24d', '25d', '26d', '27d', '28d', '29d', '30d', '31d', NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x34.php b/core/lib/Drupal/Component/Transliteration/data/x34.php
index 1281649f17e303f643111ded714255feb62fba88..ef4dcea43274d8ee85b30118ccefa6db72540f31 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x34.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x34.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'qiu', 'tian', NULL, NULL, 'kua', 'wu', 'yin', NULL, NULL, NULL, NULL, NULL, 'yi', NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, NULL, NULL, NULL, 'xie', NULL, NULL, NULL, NULL, NULL, 'chou', NULL, NULL, NULL,
   0x20 => NULL, 'nuo', NULL, NULL, 'dan', NULL, NULL, NULL, 'xu', 'xing', NULL, 'xiong', 'liu', 'lin', 'xiang', 'yong',
@@ -22,4 +22,4 @@
   0xD0 => 'lu', 'xing', NULL, 'nan', 'xie', NULL, 'bi', 'jie', 'su', NULL, 'gong', NULL, 'you', 'xing', 'qia', 'pi',
   0xE0 => 'dian', 'fu', 'luo', 'qia', 'qia', 'tang', 'bai', 'gan', 'ci', 'xuan', 'lang', NULL, NULL, 'she', NULL, 'li',
   0xF0 => 'hua', 'tou', 'pian', 'di', 'ruan', 'e', 'qie', 'yi', 'zhuo', 'rui', 'jian', NULL, 'chi', 'chong', 'xi', NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x35.php b/core/lib/Drupal/Component/Transliteration/data/x35.php
index 08b6f5d7dfa8dac58cf47b3ba821c140c870bf8b..e3e0b888eb7a26953449d615465e0ce1c21829bc 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x35.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x35.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'lue', 'deng', 'lin', 'jue', 'su', 'xiao', 'zan', NULL, NULL, 'zhu', 'zhan', 'jian', 'zou', 'chua', 'xie', 'li',
   0x10 => NULL, 'chi', 'xi', 'jian', NULL, 'ji', NULL, 'fei', 'chu', 'beng', 'jie', NULL, 'ba', 'liang', 'kuai', NULL,
   0x20 => 'xia', 'bie', 'jue', 'lei', 'xin', 'bai', 'yang', 'lu', 'bei', 'e', 'lu', NULL, NULL, 'che', 'nuo', 'xuan',
@@ -22,4 +22,4 @@
   0xD0 => NULL, 'bai', 'ai', 'zhui', 'qian', 'gou', 'dan', 'bei', 'bo', 'chu', 'li', 'xiao', 'xiu', NULL, NULL, NULL,
   0xE0 => NULL, NULL, 'hong', 'ti', 'cu', 'kuo', 'lao', 'zhi', 'xie', 'xi', NULL, 'qie', 'zha', 'xi', NULL, NULL,
   0xF0 => 'cong', 'ji', 'huo', 'ta', 'yan', 'xu', 'po', 'sai', NULL, NULL, NULL, 'guo', 'ye', 'xiang', 'xue', 'he',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x36.php b/core/lib/Drupal/Component/Transliteration/data/x36.php
index f015cbeca56fdf9266e89d1665649e8d2ecebb44..975949b5f207164bf1a41bbebc664dd847114653 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x36.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x36.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'zuo', 'yi', 'ci', NULL, 'leng', 'xian', 'tai', 'rong', 'yi', 'zhi', 'xi', 'xian', 'ju', 'ji', 'han', NULL,
   0x10 => 'pao', 'li', NULL, 'lan', 'sai', 'han', 'yan', 'qu', NULL, 'yan', 'han', 'kan', 'chi', 'nie', 'huo', NULL,
   0x20 => 'bi', 'xia', 'weng', 'xuan', 'wan', 'you', 'qin', 'xu', 'nie', 'bi', 'hao', 'jing', 'ao', 'ao', NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => 'sou', 'can', 'dou', 'xi', 'feng', 'yi', 'suo', 'qie', 'po', 'xin', 'tong', 'xin', 'you', 'bei', 'long', NULL,
   0xE0 => NULL, NULL, NULL, 'yun', 'li', 'ta', 'lan', 'man', 'qiang', 'zhou', 'yan', 'xi', 'lu', 'xi', 'sao', 'fan',
   0xF0 => NULL, 'wei', 'fa', 'yi', 'nao', 'cheng', 'tan', 'ji', 'shu', 'pian', 'an', 'kua', 'cha', NULL, 'xian', 'zhi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x37.php b/core/lib/Drupal/Component/Transliteration/data/x37.php
index b3a9b7cb8005d7733716e93e63e70f7346c93f33..f584aea751cec7cfe11b07c9152b8020a522e079 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x37.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x37.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, 'feng', 'lian', 'xun', 'xu', 'mi', 'hui', 'mu', 'yong', 'zhan', 'yi', 'nou', 'tang', 'xi', 'yun',
   0x10 => 'shu', 'fu', 'yi', 'da', NULL, 'lian', 'cao', 'can', 'ju', 'lu', 'su', 'nen', 'ao', 'an', 'qian', NULL,
   0x20 => 'cui', 'cong', NULL, 'ran', 'nian', 'mai', 'xin', 'yue', 'nai', 'ao', 'shen', 'ma', NULL, NULL, 'lan', 'xi',
@@ -22,4 +22,4 @@
   0xD0 => 'mang', 'bo', 'qun', 'qi', 'han', NULL, 'long', NULL, 'tiao', 'ze', 'qi', 'zan', 'mi', 'pei', 'zhan', 'xiang',
   0xE0 => 'gang', NULL, 'qi', NULL, 'lu', NULL, 'yun', 'e', 'duan', 'min', 'wei', 'quan', 'sou', 'min', 'tu', NULL,
   0xF0 => 'ming', 'yao', 'jue', 'li', 'kuai', 'gang', 'yuan', 'da', NULL, 'lao', 'lou', 'qian', 'ao', 'biao', 'yong', 'mang',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x38.php b/core/lib/Drupal/Component/Transliteration/data/x38.php
index b807b9c86b03882749b1b178aa598a9435365e4c..c175ad5a1fb94c8e04d6c87885be0ea8b7b12169 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x38.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x38.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'dao', NULL, 'ao', NULL, 'xi', 'fu', 'dan', 'jiu', 'run', 'tong', 'qu', 'e', 'qi', 'ji', 'ji', 'hua',
   0x10 => 'jiao', 'zui', 'biao', 'meng', 'bai', 'wei', 'yi', 'ao', 'yu', 'hao', 'dui', 'wo', 'ni', 'cuan', NULL, 'li',
   0x20 => 'lu', 'niao', 'huai', 'li', NULL, 'lu', 'feng', 'mi', 'yu', NULL, 'ju', NULL, NULL, 'zhan', 'peng', 'yi',
@@ -22,4 +22,4 @@
   0xD0 => 'bian', 'rong', 'ceng', 'can', 'ding', NULL, NULL, NULL, NULL, 'di', 'tong', 'ta', 'xing', 'song', 'duo', 'xi',
   0xE0 => 'tao', NULL, 'ti', 'shan', 'jian', 'zhi', 'wei', 'yin', NULL, NULL, 'huan', 'zhong', 'qi', 'zong', NULL, 'xie',
   0xF0 => 'xie', 'ze', 'wei', NULL, NULL, 'ta', 'zhan', 'ning', NULL, NULL, NULL, 'yi', 'ren', 'shu', 'cha', 'zhuo',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x39.php b/core/lib/Drupal/Component/Transliteration/data/x39.php
index d96877d3a75707b21f52fff07819983c064cb1f3..b550c1c3341a9ae3500565026ffa5c21ecb1b73a 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x39.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x39.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, 'mian', 'ji', 'fang', 'pei', 'ai', 'fan', 'ao', 'qin', 'qia', 'xiao', 'fen', 'gan', 'qiao', 'ge', 'tong',
   0x10 => 'chan', 'you', 'gao', 'ben', 'fu', 'chu', 'zhu', NULL, 'zhou', NULL, 'hang', 'nin', 'jue', 'chong', 'cha', 'kong',
   0x20 => 'lie', 'li', 'yu', NULL, 'yu', 'hai', 'li', 'hou', 'gong', 'ke', 'yuan', 'de', 'hui', NULL, 'guang', 'jiong',
@@ -22,4 +22,4 @@
   0xD0 => 'song', 'hui', 'yu', 'gua', 'guai', 'liu', 'e', 'zi', 'zi', 'bi', 'wa', NULL, 'lie', NULL, NULL, 'kuai',
   0xE0 => NULL, 'hai', 'yin', 'zhu', 'chong', 'xian', 'xuan', NULL, 'qiu', 'pei', 'gui', 'er', 'gong', 'qiong', 'hu', 'lao',
   0xF0 => 'li', 'chen', 'san', 'zhuo', 'wo', 'pou', 'keng', 'tun', 'peng', 'te', 'ta', 'zhuo', 'biao', 'gu', 'hu', NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x3a.php b/core/lib/Drupal/Component/Transliteration/data/x3a.php
index e1ae1ade5268f9d56dd01013e5f2ceebbdfb7795..dd38ed1f59cf702ccf4a9b2a3a32f73eccba7359 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x3a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x3a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'bing', 'zhi', 'dong', 'dui', 'zhou', 'nei', 'lin', 'po', 'ji', 'min', 'wei', 'che', 'gou', 'bang', 'ru', 'tan',
   0x10 => 'bu', 'zong', 'kui', 'lao', 'han', 'ying', 'zhi', 'jie', 'xing', 'xie', 'xun', 'shan', 'qian', 'xie', 'su', 'hai',
   0x20 => 'mi', 'hun', 'pi', NULL, 'hui', 'na', 'song', 'ben', 'chou', 'jie', 'huang', 'lan', NULL, 'hu', 'dou', 'huo',
@@ -22,4 +22,4 @@
   0xD0 => 'yao', 'zhi', 'gong', 'qi', 'gen', NULL, NULL, 'hou', 'mi', 'fu', 'hu', 'guang', 'tan', 'di', NULL, 'yan',
   0xE0 => NULL, NULL, 'qu', NULL, 'chang', 'ming', 'tao', 'bao', 'an', NULL, NULL, 'xian', NULL, NULL, NULL, 'mao',
   0xF0 => 'lang', 'nan', 'bei', 'chen', NULL, 'fei', 'zhou', 'ji', 'jie', 'shu', NULL, 'kun', 'die', 'lu', NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x3b.php b/core/lib/Drupal/Component/Transliteration/data/x3b.php
index 4ce0a1e7bf5898ff37a4e968e8f5361d88f3d5e1..8fc526cb5308064dc265ff738d6fffee7b5f7920 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x3b.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x3b.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, 'yu', 'tai', 'chan', 'man', 'min', 'huan', 'wen', 'nuan', 'huan', 'hou', 'jing', 'bo', 'xian', 'li',
   0x10 => 'jin', NULL, 'mang', 'piao', 'hao', 'yang', NULL, 'xian', 'su', 'wei', 'che', 'xi', 'jin', 'ceng', 'he', 'fen',
   0x20 => 'shai', 'ling', NULL, 'dui', 'qi', 'pu', 'yue', 'bo', NULL, 'hui', 'die', 'yan', 'ju', 'jiao', 'nan', 'lie',
@@ -22,4 +22,4 @@
   0xD0 => 'fang', NULL, NULL, 'ta', 'cui', 'xi', 'de', 'xian', 'kuan', 'zhe', 'ta', 'hu', 'cui', 'lu', 'juan', 'lu',
   0xE0 => 'qian', 'pao', 'zhen', NULL, 'li', 'cao', 'qi', NULL, NULL, 'ti', 'ling', 'qu', 'lian', 'lu', 'shu', 'gong',
   0xF0 => 'zhe', 'pao', 'jin', 'qing', NULL, NULL, 'zong', 'pu', 'jin', 'biao', 'jian', 'gun', NULL, NULL, 'zao', 'lie',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x3c.php b/core/lib/Drupal/Component/Transliteration/data/x3c.php
index 31267d9cdaedc8877c7264e10c09945f2f989bdd..c60d93602cdafa8a55043207fab7725b2cbc7e28 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x3c.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x3c.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'li', 'luo', 'shen', 'mian', 'jian', 'di', 'bei', NULL, 'lian', NULL, 'xian', 'pin', 'que', 'long', 'zui', NULL,
   0x10 => 'jue', 'shan', 'xue', NULL, 'xie', NULL, 'lan', 'qi', 'yi', 'nuo', 'li', 'yue', NULL, 'yi', 'chi', 'ji',
   0x20 => 'hang', 'xie', 'keng', 'zi', 'he', 'xi', 'qu', 'hai', 'xia', 'hai', 'gui', 'chan', 'xun', 'xu', 'shen', 'kou',
@@ -22,4 +22,4 @@
   0xD0 => 'zha', 'yi', 'bian', NULL, 'dui', 'lan', 'yi', 'chai', 'chong', 'xuan', 'xu', 'yu', 'xiu', NULL, NULL, NULL,
   0xE0 => 'ta', 'guo', NULL, NULL, NULL, 'long', 'xie', 'che', 'jian', 'tan', 'pi', 'zan', 'xuan', 'xian', 'niao', NULL,
   0xF0 => NULL, NULL, NULL, NULL, 'mi', 'ji', 'nou', 'hu', 'hua', 'wang', 'you', 'ze', 'bi', 'mi', 'qiang', 'xie',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x3d.php b/core/lib/Drupal/Component/Transliteration/data/x3d.php
index f83e669f66a181d9db8d43c5c895ed20046ecf21..78b313142a79e27b6cfe921804811afffd547151 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x3d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x3d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'fan', 'yi', 'tan', 'lei', 'yong', NULL, 'jin', 'she', 'yin', 'ji', NULL, 'su', NULL, NULL, NULL, 'wang',
   0x10 => 'mian', 'su', 'yi', 'shai', 'xi', 'ji', 'luo', 'you', 'mao', 'zha', 'sui', 'zhi', 'bian', 'li', NULL, NULL,
   0x20 => NULL, NULL, NULL, NULL, NULL, 'qiao', 'guan', 'xi', 'zhen', 'yong', 'nie', 'jun', 'xie', 'yao', 'xie', 'zhi',
@@ -22,4 +22,4 @@
   0xD0 => 'hui', NULL, 'yu', 'zong', 'yan', 'qiu', 'zhao', 'jiong', 'tai', NULL, NULL, NULL, NULL, NULL, NULL, 'tui',
   0xE0 => 'lin', 'jiong', 'zha', 'xing', 'hu', NULL, 'xu', NULL, NULL, NULL, 'cui', 'qing', 'mo', NULL, 'zao', 'beng',
   0xF0 => 'chi', NULL, NULL, 'yan', 'ge', 'mo', 'bei', 'juan', 'die', 'zhao', NULL, 'wu', 'yan', NULL, 'jue', 'xian',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x3e.php b/core/lib/Drupal/Component/Transliteration/data/x3e.php
index 1c2e517bd930af7bdbcbd844ee10757be7c48ccc..f4b1fd4391602f5855fc6b3da20b25b8647c7697 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x3e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x3e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'tai', 'han', NULL, 'dian', 'ji', 'jie', NULL, 'zuan', NULL, 'xie', 'lai', 'fan', 'huo', 'xi', 'nie', 'mi',
   0x10 => 'ran', 'cuan', 'yin', 'mi', NULL, 'jue', 'qu', 'tong', 'wan', 'zhe', 'li', 'shao', 'kong', 'xian', 'zhe', 'zhi',
   0x20 => 'tiao', 'shu', 'bei', 'ye', 'pian', 'chan', 'hu', 'ken', 'jiu', 'an', 'chun', 'qian', 'bei', 'ba', 'fen', 'ke',
@@ -22,4 +22,4 @@
   0xD0 => NULL, 'ji', 'jun', 'zou', 'duo', 'jue', 'dai', 'bei', NULL, NULL, NULL, NULL, NULL, 'la', 'bin', 'sui',
   0xE0 => 'tu', 'xue', NULL, NULL, NULL, NULL, NULL, 'duo', NULL, NULL, 'sui', 'bi', 'tu', 'se', 'can', 'tu',
   0xF0 => 'mian', 'jin', 'lu', NULL, NULL, 'zhan', 'bi', 'ji', 'zen', 'xuan', 'li', NULL, NULL, 'sui', 'yong', 'shu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x3f.php b/core/lib/Drupal/Component/Transliteration/data/x3f.php
index 7b6015891c05c93d79d47830997127ce4bf78a56..1d227283799d2abde8dec26a95351d70513210d7 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x3f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x3f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, 'e', NULL, NULL, NULL, NULL, 'qiong', 'luo', 'zhen', 'tun', 'gu', 'yu', 'lei', 'bo', 'nei',
   0x10 => 'pian', 'lian', 'tang', 'lian', 'wen', 'dang', 'li', 'ting', 'wa', 'zhou', 'gang', 'xing', 'ang', 'fan', 'peng', 'bo',
   0x20 => 'tuo', 'shu', 'yi', 'bo', 'qie', 'tou', 'gong', 'tong', 'han', 'cheng', 'jie', 'huan', 'xing', 'dian', 'chai', 'dong',
@@ -22,4 +22,4 @@
   0xD0 => NULL, 'yao', 'dao', 'jia', 'lei', 'yan', 'lu', 'tui', 'ying', 'pi', 'luo', 'li', 'bie', NULL, 'mao', 'bai',
   0xE0 => 'huang', NULL, 'yao', 'he', 'chun', 'he', 'ning', 'chou', 'li', 'tang', 'huan', 'bi', 'ba', 'che', 'yang', 'da',
   0xF0 => 'ao', 'xue', NULL, 'zi', 'da', 'ran', 'bang', 'cuo', 'wan', 'ta', 'bao', 'gan', 'yan', 'xi', 'zhu', 'ya',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x40.php b/core/lib/Drupal/Component/Transliteration/data/x40.php
index 9e7c307da0636932187c6c7c21f7a2ddb5601e12..ba952e9bae4e16b9ed1e40d508caa1118636e98f 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x40.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x40.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'fan', 'you', 'an', 'tui', 'meng', 'she', 'jin', 'gu', 'ji', 'qiao', 'jiao', 'yan', 'xi', 'kan', 'mian', 'xuan',
   0x10 => 'shan', 'wo', 'qian', 'huan', 'ren', 'zhen', 'tian', 'jue', 'xie', 'qi', 'ang', 'mei', 'gu', NULL, 'tao', 'fan',
   0x20 => 'ju', 'chan', 'shun', 'bi', 'mao', 'shuo', 'gu', 'hong', 'hua', 'luo', 'hang', 'jia', 'quan', 'gai', 'huang', 'bu',
@@ -22,4 +22,4 @@
   0xD0 => NULL, 'ban', 'he', 'gou', 'hong', 'lao', 'wu', 'bo', 'keng', 'lu', 'cu', 'lian', 'yi', 'qiao', 'shu', NULL,
   0xE0 => 'xuan', 'jin', 'qin', 'hui', 'su', 'chuang', 'dun', 'long', NULL, 'nao', 'tan', 'dan', 'wei', 'gan', 'da', 'li',
   0xF0 => 'ca', 'xian', 'pan', 'la', 'zhu', 'niao', 'huai', 'ying', 'xian', 'lan', 'mo', 'ba', NULL, 'gui', 'bi', 'fu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x41.php b/core/lib/Drupal/Component/Transliteration/data/x41.php
index f32b7e52d4b1c6e03bf00dc116e016142f903601..bb33c8bdd2b725a28392b20e963cd17bd7f6210b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x41.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x41.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'huo', 'yi', 'liu', NULL, 'yin', 'juan', 'huo', 'cheng', 'dou', 'e', NULL, 'yan', 'zhui', 'zha', 'qi', 'yu',
   0x10 => 'quan', 'huo', 'nie', 'huang', 'ju', 'she', NULL, NULL, 'peng', 'ming', 'cao', 'lou', 'li', 'chuang', NULL, 'cui',
   0x20 => 'shan', 'dan', 'qi', NULL, 'lai', 'ling', 'liao', 'reng', 'yu', 'yi', 'diao', 'qi', 'yi', 'nian', 'fu', 'jian',
@@ -22,4 +22,4 @@
   0xD0 => 'li', 'ba', 'jie', 'xu', 'luo', NULL, 'yun', 'zhong', 'hu', 'yin', NULL, 'zhi', 'qian', NULL, 'gan', 'jian',
   0xE0 => 'zhu', 'zhu', 'ku', 'nie', 'rui', 'ze', 'ang', 'zhi', 'gong', 'yi', 'chi', 'ji', 'zhu', 'lao', 'ren', 'rong',
   0xF0 => 'zheng', 'na', 'ce', NULL, NULL, 'yi', 'jue', 'bie', 'cheng', 'jun', 'dou', 'wei', 'yi', 'zhe', 'yan', NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x42.php b/core/lib/Drupal/Component/Transliteration/data/x42.php
index 27e73385d7b826896b083c8e044467b7e54a7831..d5043fc89b9c1d3ff4f8d323815b6663d022b0da 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x42.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x42.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'san', 'lun', 'ping', 'zhao', 'han', 'yu', 'dai', 'zhao', 'fei', 'sha', 'ling', 'ta', 'qu', 'mang', 'ye', 'bao',
   0x10 => 'gui', 'gua', 'nan', 'ge', NULL, 'shi', 'ke', 'suo', 'ci', 'zhou', 'tai', 'kuai', 'qin', 'xu', 'du', 'ce',
   0x20 => 'huan', 'cong', 'sai', 'zheng', 'qian', 'jin', 'zong', 'wei', NULL, NULL, 'xi', 'na', 'pu', 'sou', 'ju', 'zhen',
@@ -22,4 +22,4 @@
   0xD0 => 'yue', 'lie', NULL, 'zhou', 'bi', 'ren', 'yu', NULL, 'chuo', 'er', 'yi', 'mi', 'qing', NULL, 'wang', 'ji',
   0xE0 => 'bu', NULL, 'bie', 'fan', 'yue', 'li', 'fan', 'qu', 'fu', 'er', 'e', 'zheng', 'tian', 'yu', 'jin', 'qi',
   0xF0 => 'ju', 'lai', 'che', 'bei', 'niu', 'yi', 'xu', 'mou', 'xun', 'fu', NULL, 'nin', 'ting', 'beng', 'zha', 'wei',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x43.php b/core/lib/Drupal/Component/Transliteration/data/x43.php
index 8291d9d39f7c7931e2e287d906eb1278fa3c5964..81efa7dc6cb62ba3b140e3673f0c21aca3345603 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x43.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x43.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ke', 'yao', 'ou', 'xiao', 'geng', 'tang', 'gui', 'hui', 'ta', NULL, 'yao', 'da', 'qi', 'jin', 'lue', 'mi',
   0x10 => 'mi', 'jian', 'lu', 'fan', 'ou', 'mi', 'jie', 'fu', 'bie', 'huang', 'su', 'yao', 'nie', 'jin', 'lian', 'bo',
   0x20 => 'jian', 'ti', 'ling', 'zuan', 'shi', 'yin', 'dao', 'chou', 'ca', 'mie', 'yan', 'lan', 'chong', 'jiao', 'shuang', 'quan',
@@ -22,4 +22,4 @@
   0xD0 => 'jue', 'di', 'pian', 'guan', 'niu', 'ren', 'zhen', 'gai', 'pi', 'tan', 'chao', 'chun', 'he', 'zhuan', 'mo', 'bie',
   0xE0 => 'qi', 'shi', 'bi', 'jue', 'si', NULL, 'gua', 'na', 'hui', 'xi', 'er', 'xiu', 'mou', NULL, 'xi', 'zhi',
   0xF0 => 'run', 'ju', 'die', 'zhe', 'shao', 'meng', 'bi', 'han', 'yu', 'xian', 'pang', 'neng', 'can', 'bu', NULL, 'qi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x44.php b/core/lib/Drupal/Component/Transliteration/data/x44.php
index af44abbf2f501df44192a5a46194e86c584bd197..8bbb7267659c2edc0f378f56c3f1c5c5b152a20c 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x44.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x44.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ji', 'zhuo', 'lu', 'jun', 'xian', 'xi', 'cai', 'wen', 'zhi', 'zi', 'kun', 'cong', 'tian', 'chu', 'di', 'chun',
   0x10 => 'qiu', 'zhe', 'zha', 'rou', 'bin', 'ji', 'xi', 'zhu', 'jue', 'ge', 'ji', 'da', 'chen', 'suo', 'ruo', 'xiang',
   0x20 => 'huang', 'qi', 'zhu', 'sun', 'chai', 'weng', 'ke', 'kao', 'gu', 'gai', 'fan', 'cong', 'cao', 'zhi', 'chan', 'lei',
@@ -22,4 +22,4 @@
   0xD0 => 'chun', 'ping', 'kuai', 'chou', NULL, 'tuo', 'qiong', 'cong', 'gao', 'kua', 'qu', 'qu', 'zhi', 'meng', 'li', 'zhou',
   0xE0 => 'ta', 'zhi', 'gu', 'liang', 'hu', 'la', 'dian', 'ci', 'ying', NULL, NULL, 'qi', NULL, 'cha', 'mao', 'du',
   0xF0 => 'yin', 'chai', 'rui', 'hen', 'ruan', 'fu', 'lai', 'xing', 'jian', 'yi', 'mei', NULL, 'mang', 'ji', 'suo', 'han',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x45.php b/core/lib/Drupal/Component/Transliteration/data/x45.php
index 0ba25ac507ac8a3e9623911a4b544c94d475673e..88a0b2794378ee7d9e19c10483a751257f3743d8 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x45.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x45.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, 'li', 'zi', 'zu', 'yao', 'ge', 'li', 'qi', 'gong', 'li', 'bing', 'suo', NULL, NULL, 'su', 'chou',
   0x10 => 'jian', 'xie', 'bei', 'xu', 'jing', 'pu', 'ling', 'xiang', 'zuo', 'diao', 'chun', 'qing', 'nan', 'zhai', 'lu', 'yi',
   0x20 => 'shao', 'yu', 'hua', 'li', 'pa', NULL, NULL, 'li', NULL, NULL, 'shuang', NULL, 'yi', 'ning', 'si', 'ku',
@@ -22,4 +22,4 @@
   0xD0 => 'shi', 'yi', 'bing', 'cong', 'hou', 'wan', 'di', 'ji', 'ge', 'han', 'bo', 'xiu', 'liu', 'can', 'can', 'yi',
   0xE0 => 'xuan', 'yan', 'zao', 'han', 'yong', 'zong', NULL, 'kang', 'yu', 'qi', 'zhe', 'ma', NULL, NULL, 'shuang', 'jin',
   0xF0 => 'guan', 'pu', 'lin', NULL, 'ting', 'jiang', 'la', 'yi', 'yong', 'ci', 'yan', 'jie', 'xun', 'wei', 'xian', 'ning',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x46.php b/core/lib/Drupal/Component/Transliteration/data/x46.php
index 3311641252d027d4bbb0e28eddcb7bb23b443ac2..032f0833c819b8cd4d4fe92b467963062b3c2116 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x46.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x46.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'fu', 'ge', NULL, 'mo', 'zhu', 'nai', 'xian', 'wen', 'li', 'can', 'mie', 'jian', 'ni', 'chai', 'wan', 'xu',
   0x10 => 'nu', 'mai', 'zui', 'kan', 'ka', 'hang', NULL, NULL, 'yu', 'wei', 'zhu', NULL, NULL, 'yi', NULL, 'diao',
   0x20 => 'fu', 'bi', 'zhu', 'zi', 'shu', 'xia', 'ni', NULL, 'jiao', 'xun', 'chong', 'nou', 'rong', 'zhi', 'sang', NULL,
@@ -22,4 +22,4 @@
   0xD0 => 'ci', 'mi', 'bian', NULL, 'na', 'yu', 'e', 'zhi', 'ren', 'xu', 'lue', 'hui', 'xun', 'nao', 'han', 'jia',
   0xE0 => 'dou', 'hua', 'tu', 'ping', 'cu', 'xi', 'song', 'mi', 'xin', 'wu', 'qiong', 'zhang', 'tao', 'xing', 'jiu', 'ju',
   0xF0 => 'hun', 'ti', 'man', 'yan', 'ji', 'shou', 'lei', 'wan', 'che', 'can', 'jie', 'you', 'hui', 'zha', 'su', 'ge',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x47.php b/core/lib/Drupal/Component/Transliteration/data/x47.php
index 58a79c46d7bf0d77e8f80b7c63c7de715434683a..4981e9fd1fc08d0f90d8a65db919c78d3d9a5681 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x47.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x47.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'nao', 'xi', NULL, 'dui', 'chi', 'wei', 'zhe', 'gun', 'chao', 'chi', 'zao', 'hui', 'luan', 'liao', 'lao', 'tuo',
   0x10 => 'hui', 'wu', 'ao', 'she', 'sui', 'mai', 'tan', 'xin', 'jing', 'an', 'ta', 'chan', 'wei', 'tuan', 'ji', 'chen',
   0x20 => 'che', 'yu', 'xian', 'xin', NULL, NULL, NULL, 'nao', NULL, 'yan', 'qiu', 'jiang', 'song', 'jun', 'liao', 'ju',
@@ -22,4 +22,4 @@
   0xD0 => 'li', 'yue', 'quan', 'cheng', 'fu', 'cha', 'tang', 'shi', 'hang', 'qie', 'qi', 'bo', 'na', 'tou', 'chu', 'cu',
   0xE0 => 'yue', 'zhi', 'chen', 'chu', 'bi', 'meng', 'ba', 'tian', 'min', 'lie', 'feng', 'cheng', 'qiu', 'tiao', 'fu', 'kuo',
   0xF0 => 'jian', NULL, NULL, NULL, 'zhen', 'qiu', 'zuo', 'chi', 'kui', 'lie', 'bei', 'du', 'wu', NULL, 'zhuo', 'lu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x48.php b/core/lib/Drupal/Component/Transliteration/data/x48.php
index 668713dbd0c4a5f26305feefff45fadad9dbf810..c5ee78f50d0d5c55c817b7e14689244aa9160486 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x48.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x48.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'tang', NULL, 'chu', 'liang', 'tian', 'kun', 'chang', 'jue', 'tu', 'huan', 'fei', 'bi', NULL, 'xia', 'wo', 'ji',
   0x10 => 'qu', 'kui', 'hu', 'qiu', 'sui', 'cai', NULL, 'qiu', 'pi', 'pang', 'wa', 'yao', 'rong', 'xun', 'cu', 'die',
   0x20 => 'chi', 'cuo', 'meng', 'xuan', 'duo', 'bie', 'zhe', 'chu', 'chan', 'gui', 'duan', 'zou', 'deng', 'lai', 'teng', 'yue',
@@ -22,4 +22,4 @@
   0xD0 => 'ying', 'chan', NULL, 'li', 'suo', 'ma', 'ma', NULL, 'tang', 'pei', 'lou', 'qi', 'cuo', 'tu', 'e', 'can',
   0xE0 => 'jie', 'yi', 'ji', 'dang', 'jue', 'bi', 'lei', 'yi', 'chun', 'chun', 'po', 'li', 'zai', 'tai', 'po', 'cu',
   0xF0 => 'ju', 'xu', 'fan', NULL, 'xu', 'er', 'huo', 'zhu', 'ran', 'fa', 'juan', 'han', 'liang', 'zhi', 'mi', 'yu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x49.php b/core/lib/Drupal/Component/Transliteration/data/x49.php
index d9bde7a81d89c9bb0f7dff310071bda32cc357a4..75c9bafe6afbe5d7130791ed6a2b4b755d88dbda 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x49.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x49.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, 'cen', 'mei', 'yin', 'mian', 'tu', 'kui', NULL, NULL, 'mi', 'rong', 'yu', 'qiang', 'mi', 'ju', 'pi',
   0x10 => 'jin', 'wang', 'ji', 'meng', 'jian', 'xue', 'bao', 'gan', 'chan', 'li', 'li', 'qiu', 'dun', 'ying', 'yun', 'chen',
   0x20 => 'zhi', 'ran', NULL, 'lue', 'kai', 'gui', 'yue', 'hui', 'pi', 'cha', 'duo', 'chan', 'sha', 'shi', 'she', 'xing',
@@ -22,4 +22,4 @@
   0xD0 => NULL, 'di', 'lai', 'zhou', 'nian', 'cheng', 'jian', 'bi', 'zhuan', 'ling', 'hao', 'bang', 'tang', 'chi', 'ma', 'xian',
   0xE0 => 'shuan', 'yong', 'qu', NULL, 'pu', 'hui', 'wei', 'yi', 'ye', NULL, 'che', 'hao', 'bin', NULL, 'xian', 'chan',
   0xF0 => 'hun', NULL, 'han', 'ci', 'zhi', 'qi', 'kui', 'rou', NULL, 'ying', 'xiong', NULL, 'hu', 'cui', NULL, 'que',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x4a.php b/core/lib/Drupal/Component/Transliteration/data/x4a.php
index 60e658b752eb291d2fe0ad502ce2c6f87a840cd4..12d5aee8d89d5e54c6bd545d0ed3120a27621769 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x4a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x4a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'di', 'wu', 'qiu', NULL, 'yan', 'liao', 'bi', NULL, 'bin', NULL, 'yuan', 'nue', 'bao', 'ying', 'hong', 'ci',
   0x10 => 'qia', 'ti', 'yu', 'lei', 'bao', NULL, 'ji', 'fu', 'xian', 'cen', 'hu', 'se', 'beng', 'qing', 'yu', 'wa',
   0x20 => 'ai', 'han', 'dan', 'ge', 'di', 'huo', 'pang', NULL, 'zhui', 'ling', 'mai', 'mai', 'lian', 'xiao', 'xue', 'zhen',
@@ -22,4 +22,4 @@
   0xD0 => 'lin', 'yi', 'men', 'wu', 'qi', 'die', 'chen', 'xia', 'he', 'sang', 'gua', 'hou', 'ao', 'fu', 'qiao', 'hun',
   0xE0 => 'pi', 'yan', 'si', 'xi', 'ming', 'kui', 'ge', NULL, 'ao', 'san', 'shuang', 'lou', 'zhen', 'hui', 'chan', NULL,
   0xF0 => 'lin', 'na', 'han', 'du', 'jin', 'mian', 'fan', 'e', 'chao', 'hong', 'hong', 'yu', 'xue', 'pao', 'bi', 'chao',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x4b.php b/core/lib/Drupal/Component/Transliteration/data/x4b.php
index 625a88040fa3a848b4c7a4c483b86608ad1a59a1..8b542e0ce92c5ab67c952e3a0354ba66a98672aa 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x4b.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x4b.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'you', 'yi', 'xue', 'sa', 'xu', 'li', 'li', 'yuan', 'dui', 'huo', 'sha', 'leng', 'pou', 'hu', 'guo', 'bu',
   0x10 => 'rui', 'wei', 'sou', 'an', 'yu', 'xiang', 'heng', 'yang', 'xiao', 'yao', NULL, 'bi', NULL, 'heng', 'tao', 'liu',
   0x20 => NULL, 'zhu', NULL, 'xi', 'zan', 'yi', 'dou', 'yuan', 'jiu', NULL, 'bo', 'ti', 'ying', NULL, 'yi', 'nian',
@@ -22,4 +22,4 @@
   0xD0 => 'hai', 'kuang', 'heng', 'kui', 'ze', 'ting', 'lang', 'bi', 'huan', 'po', 'yao', 'wan', 'ti', 'sui', 'kua', 'dui',
   0xE0 => 'ao', 'jian', 'mo', 'kui', 'kuai', 'an', 'ma', 'qing', 'qiao', NULL, 'kao', 'hao', 'duo', 'xian', 'nai', 'suo',
   0xF0 => 'jie', 'pi', 'pa', 'song', 'chang', 'nie', 'man', 'song', 'ci', 'xian', 'kuo', NULL, 'di', 'pou', 'tiao', 'zu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x4c.php b/core/lib/Drupal/Component/Transliteration/data/x4c.php
index aa1852ce41a892ad282cc18f921c4821eff964ec..38398a2d1d39f52d9c2a4db9963080fb4ff6971a 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x4c.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x4c.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'wo', 'fei', 'cai', 'peng', 'sai', NULL, 'rou', 'qi', 'cuo', 'pan', 'bo', 'man', 'zong', 'ci', 'kui', 'ji',
   0x10 => 'lan', NULL, 'meng', 'mian', 'pan', 'lu', 'zuan', NULL, 'liu', 'yi', 'wen', 'li', 'li', 'zeng', 'zhu', 'hun',
   0x20 => 'shen', 'chi', 'xing', 'wang', 'dong', 'huo', 'pi', 'hu', 'mei', 'che', 'mei', 'chao', 'ju', 'nou', NULL, 'yi',
@@ -22,4 +22,4 @@
   0xD0 => 'ci', 'you', 'yuan', 'lao', 'ju', 'fu', 'nie', 'e', 'e', 'xing', 'kan', 'yan', 'tu', 'pou', 'beng', 'ming',
   0xE0 => 'shui', 'yan', 'qi', 'yuan', 'bie', NULL, 'xuan', 'hou', 'huang', 'yao', 'juan', 'kui', 'e', 'ji', 'mo', 'chong',
   0xF0 => 'bao', 'wu', 'zhen', 'xu', 'ta', 'chi', 'xi', 'cong', 'ma', 'kou', 'yan', 'can', NULL, 'he', 'deng', 'ran',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x4d.php b/core/lib/Drupal/Component/Transliteration/data/x4d.php
index b77e988955a7342e2a7d00b96e2119224139a130..fb9737fa8a254f8332091e91625e48dd153b5ba0 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x4d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x4d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'tong', 'yu', 'xiang', 'nao', 'shun', 'fen', 'pu', 'ling', 'ao', 'huan', 'yi', 'huan', 'meng', 'ying', 'lei', 'yan',
   0x10 => 'bao', 'die', 'ling', 'shi', 'jiao', 'lie', 'jing', 'ju', 'ti', 'pi', 'gang', 'xiao', 'wai', 'chuai', 'di', 'huan',
   0x20 => 'yao', 'li', 'mi', 'hu', 'sheng', 'jia', 'yin', 'wei', NULL, 'piao', 'lu', 'ling', 'yi', 'cai', 'shan', 'hu',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x4e.php b/core/lib/Drupal/Component/Transliteration/data/x4e.php
index 868c80d3cc727ed0a5ea9695c441447afd95d033..1d833446e22c5e5d7e0fc70e54bfcf37354cd009 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x4e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x4e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yi', 'ding', 'kao', 'qi', 'shang', 'xia', 'han', 'wan', 'zhang', 'san', 'shang', 'xia', 'ji', 'bu', 'yu', 'mian',
   0x10 => 'gai', 'chou', 'chou', 'zhuan', 'qie', 'pi', 'shi', 'shi', 'qiu', 'bing', 'ye', 'cong', 'dong', 'si', 'cheng', 'diu',
   0x20 => 'qiu', 'liang', 'diu', 'you', 'liang', 'yan', 'bing', 'sang', 'gun', 'jiu', 'ge', 'ya', 'qiang', 'zhong', 'ji', 'jie',
@@ -22,4 +22,4 @@
   0xD0 => 'san', 'lun', 'bing', 'cang', 'zi', 'shi', 'ta', 'zhang', 'fu', 'xian', 'xian', 'tuo', 'hong', 'tong', 'ren', 'qian',
   0xE0 => 'gan', 'ge', 'bo', 'dai', 'ling', 'yi', 'chao', 'chang', 'sa', 'shang', 'yi', 'mu', 'men', 'ren', 'jia', 'chao',
   0xF0 => 'yang', 'qian', 'zhong', 'pi', 'wo', 'wu', 'jian', 'jia', 'yao', 'feng', 'cang', 'ren', 'wang', 'fen', 'di', 'fang',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x4f.php b/core/lib/Drupal/Component/Transliteration/data/x4f.php
index 01144a550bea73fee6a97ce80cb4bbdc46a11d3e..ee4723b1085c4702a22ab50616dcb4acc2215375 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x4f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x4f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'zhong', 'qi', 'pei', 'yu', 'diao', 'dun', 'wu', 'yi', 'xin', 'kang', 'yi', 'ji', 'ai', 'wu', 'ji', 'fu',
   0x10 => 'fa', 'xiu', 'jin', 'pi', 'dan', 'fu', 'tang', 'zhong', 'you', 'huo', 'hui', 'yu', 'cui', 'chuan', 'san', 'wei',
   0x20 => 'chuan', 'che', 'ya', 'xian', 'shang', 'chang', 'lun', 'cang', 'xun', 'xin', 'wei', 'zhu', 'ze', 'xian', 'nu', 'bo',
@@ -22,4 +22,4 @@
   0xD0 => 'li', 'yong', 'hun', 'jing', 'qian', 'san', 'pei', 'su', 'fu', 'xi', 'li', 'fu', 'ping', 'bao', 'yu', 'qi',
   0xE0 => 'xia', 'xin', 'xiu', 'yu', 'di', 'che', 'chou', 'zhi', 'yan', 'lia', 'li', 'lai', 'si', 'jian', 'xiu', 'fu',
   0xF0 => 'huo', 'ju', 'xiao', 'pai', 'jian', 'biao', 'chu', 'fei', 'feng', 'ya', 'an', 'bei', 'yu', 'xin', 'bi', 'hu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x50.php b/core/lib/Drupal/Component/Transliteration/data/x50.php
index f3e3e53092a1cf10440c1963d5feaa4f2b0ed5da..1fd5d9dd0f10f16e9c1de90248ab974e08340696 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x50.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x50.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'chang', 'zhi', 'bing', 'jiu', 'yao', 'cui', 'lia', 'wan', 'lai', 'cang', 'zong', 'ge', 'guan', 'bei', 'tian', 'shu',
   0x10 => 'shu', 'men', 'dao', 'tan', 'jue', 'chui', 'xing', 'peng', 'tang', 'hou', 'yi', 'qi', 'ti', 'gan', 'jing', 'jie',
   0x20 => 'sui', 'chang', 'jie', 'fang', 'zhi', 'kong', 'juan', 'zong', 'ju', 'qian', 'ni', 'lun', 'zhuo', 'wo', 'luo', 'song',
@@ -22,4 +22,4 @@
   0xD0 => 'shan', 'qiao', 'jiong', 'tui', 'zun', 'pu', 'xi', 'lao', 'chang', 'guang', 'liao', 'qi', 'cheng', 'chan', 'wei', 'ji',
   0xE0 => 'bo', 'hui', 'chuan', 'tie', 'dan', 'jiao', 'jiu', 'seng', 'fen', 'xian', 'ju', 'e', 'jiao', 'jian', 'tong', 'lin',
   0xF0 => 'bo', 'gu', 'xian', 'su', 'xian', 'jiang', 'min', 'ye', 'jin', 'jia', 'qiao', 'pi', 'feng', 'zhou', 'ai', 'sai',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x51.php b/core/lib/Drupal/Component/Transliteration/data/x51.php
index 3f00d5ab9ea183073fb22d3a6ca134a52b828545..f5ad0080eef1185f3b95817b42680811c26bf18a 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x51.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x51.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yi', 'jun', 'nong', 'chan', 'yi', 'dang', 'jing', 'xuan', 'kuai', 'jian', 'chu', 'dan', 'jiao', 'sha', 'zai', 'can',
   0x10 => 'bin', 'an', 'ru', 'tai', 'chou', 'chai', 'lan', 'ni', 'jin', 'qian', 'meng', 'wu', 'ning', 'qiong', 'ni', 'chang',
   0x20 => 'lie', 'lei', 'lu', 'kuang', 'bao', 'yu', 'biao', 'zan', 'zhi', 'si', 'you', 'hao', 'chen', 'chen', 'li', 'teng',
@@ -22,4 +22,4 @@
   0xD0 => 'yin', 'cou', 'yi', 'li', 'chuang', 'ming', 'zhun', 'cui', 'si', 'duo', 'jin', 'lin', 'lin', 'ning', 'xi', 'du',
   0xE0 => 'ji', 'fan', 'fan', 'fan', 'feng', 'ju', 'chu', 'zheng', 'feng', 'mu', 'zhi', 'fu', 'feng', 'ping', 'feng', 'kai',
   0xF0 => 'huang', 'kai', 'gan', 'deng', 'ping', 'qian', 'xiong', 'kuai', 'tu', 'ao', 'chu', 'ji', 'dang', 'han', 'han', 'zao',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x52.php b/core/lib/Drupal/Component/Transliteration/data/x52.php
index c09edddd564db7f48d02588f22a949c81472f7f1..a3df0ee400276cdaddfc98ee0dea4b0e4c295920 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x52.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x52.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'dao', 'diao', 'dao', 'ren', 'ren', 'chuang', 'fen', 'qie', 'yi', 'ji', 'kan', 'qian', 'cun', 'chu', 'wen', 'ji',
   0x10 => 'dan', 'xing', 'hua', 'wan', 'jue', 'li', 'yue', 'lie', 'liu', 'ze', 'gang', 'chuang', 'fu', 'chu', 'qu', 'ju',
   0x20 => 'shan', 'min', 'ling', 'zhong', 'pan', 'bie', 'jie', 'jie', 'pao', 'li', 'shan', 'bie', 'chan', 'jing', 'gua', 'geng',
@@ -22,4 +22,4 @@
   0xD0 => 'meng', 'chi', 'lei', 'kai', 'mian', 'dong', 'xu', 'xu', 'kan', 'wu', 'yi', 'xun', 'weng', 'sheng', 'lao', 'mu',
   0xE0 => 'lu', 'piao', 'shi', 'ji', 'qin', 'jiang', 'chao', 'quan', 'xiang', 'yi', 'jue', 'fan', 'juan', 'tong', 'ju', 'dan',
   0xF0 => 'xie', 'mai', 'xun', 'xun', 'lu', 'li', 'che', 'rang', 'quan', 'bao', 'shao', 'yun', 'jiu', 'bao', 'gou', 'wu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x53.php b/core/lib/Drupal/Component/Transliteration/data/x53.php
index 0af1ffc1060a1a83c5ffc144f0fcdd597d57ae14..bee5a9674dee466dc78a78fd9e1791c714e4f5c6 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x53.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x53.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yun', 'wen', 'bi', 'gai', 'gai', 'bao', 'cong', 'yi', 'xiong', 'peng', 'ju', 'tao', 'ge', 'pu', 'e', 'pao',
   0x10 => 'fu', 'gong', 'da', 'jiu', 'qiong', 'bi', 'hua', 'bei', 'nao', 'shi', 'fang', 'jiu', 'yi', 'za', 'jiang', 'kang',
   0x20 => 'jiang', 'kuang', 'hu', 'xia', 'qu', 'bian', 'gui', 'qie', 'zang', 'kuang', 'fei', 'hu', 'yu', 'gui', 'kui', 'hui',
@@ -22,4 +22,4 @@
   0xD0 => 'ba', 'fa', 'ruo', 'shi', 'shu', 'zhuo', 'qu', 'shou', 'bian', 'xu', 'jia', 'pan', 'sou', 'gao', 'wei', 'sou',
   0xE0 => 'die', 'rui', 'cong', 'kou', 'gu', 'ju', 'ling', 'gua', 'dao', 'kou', 'zhi', 'jiao', 'zhao', 'ba', 'ding', 'ke',
   0xF0 => 'tai', 'chi', 'shi', 'you', 'qiu', 'po', 'ye', 'hao', 'si', 'tan', 'chi', 'le', 'diao', 'ji', 'liao', 'hong',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x54.php b/core/lib/Drupal/Component/Transliteration/data/x54.php
index 85b047619f15507437dfc48e7569fcd09df5c382..ae03398704d33d9e1cf188478c318720b55951e8 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x54.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x54.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'mie', 'xu', 'mang', 'chi', 'ge', 'xuan', 'yao', 'zi', 'he', 'ji', 'diao', 'cun', 'tong', 'ming', 'hou', 'li',
   0x10 => 'tu', 'xiang', 'zha', 'xia', 'ye', 'lu', 'ya', 'ma', 'ou', 'huo', 'yi', 'jun', 'chou', 'lin', 'tun', 'yin',
   0x20 => 'fei', 'bi', 'qin', 'qin', 'jie', 'bu', 'fou', 'ba', 'dun', 'fen', 'e', 'han', 'ting', 'keng', 'shun', 'qi',
@@ -22,4 +22,4 @@
   0xD0 => 'kuang', 'ya', 'da', 'xiao', 'bi', 'hui', 'nian', 'hua', 'xing', 'kuai', 'duo', 'fen', 'ji', 'nong', 'mou', 'yo',
   0xE0 => 'hao', 'yuan', 'long', 'pou', 'mang', 'ge', 'o', 'chi', 'shao', 'li', 'na', 'zu', 'he', 'ku', 'xiao', 'xian',
   0xF0 => 'lao', 'bo', 'zhe', 'zha', 'liang', 'ba', 'mie', 'lie', 'sui', 'fu', 'bu', 'han', 'heng', 'geng', 'shuo', 'ge',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x55.php b/core/lib/Drupal/Component/Transliteration/data/x55.php
index 3f16ee5c216e715f7d06c27d6dc345dc691df035..af2d7772ce712c4ce3138dbf6239368efde94700 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x55.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x55.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'you', 'yan', 'gu', 'gu', 'bei', 'han', 'suo', 'chun', 'yi', 'ai', 'jia', 'tu', 'xian', 'wan', 'li', 'xi',
   0x10 => 'tang', 'zuo', 'qiu', 'che', 'wu', 'zao', 'ya', 'dou', 'qi', 'di', 'qin', 'ma', 'mo', 'gong', 'dou', 'qu',
   0x20 => 'lao', 'liang', 'suo', 'zao', 'huan', 'lang', 'sha', 'ji', 'zuo', 'wo', 'feng', 'jin', 'hu', 'qi', 'shou', 'wei',
@@ -22,4 +22,4 @@
   0xD0 => 'hai', 'ke', 'da', 'sang', 'chen', 'ru', 'sou', 'wa', 'ji', 'pang', 'wu', 'qian', 'shi', 'ge', 'zi', 'jie',
   0xE0 => 'luo', 'weng', 'wa', 'si', 'chi', 'hao', 'suo', 'Jia ', 'hai', 'suo', 'qin', 'nie', 'he', 'zhi', 'sai', 'n',
   0xF0 => 'ge', 'na', 'dia', 'ai', 'qiang', 'tong', 'bi', 'ao', 'ao', 'lian', 'zui', 'zhe', 'mo', 'sou', 'sou', 'tan',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x56.php b/core/lib/Drupal/Component/Transliteration/data/x56.php
index 8f34d3c0c38f33f268f029db3495cbfe7201ea22..3d35d44470c3c44be480905b347bd57206b422a1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x56.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x56.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'di', 'qi', 'jiao', 'chong', 'jiao', 'kai', 'tan', 'shan', 'cao', 'jia', 'ai', 'xiao', 'piao', 'lou', 'ga', 'gu',
   0x10 => 'xiao', 'hu', 'hui', 'guo', 'ou', 'xian', 'ze', 'chang', 'xu', 'po', 'de', 'ma', 'ma', 'hu', 'lei', 'du',
   0x20 => 'ga', 'tang', 'ye', 'beng', 'ying', 'sai', 'jiao', 'mi', 'xiao', 'hua', 'mai', 'ran', 'chuai', 'peng', 'lao', 'xiao',
@@ -22,4 +22,4 @@
   0xD0 => 'za', 'zhu', 'lan', 'nie', 'nang', 'lan', 'lo', 'wei', 'hui', 'yin', 'qiu', 'si', 'nin', 'jian', 'hui', 'xin',
   0xE0 => 'yin', 'nan', 'tuan', 'tuan', 'dun', 'kang', 'yuan', 'jiong', 'pian', 'yun', 'cong', 'hu', 'hui', 'yuan', 'e', 'guo',
   0xF0 => 'kun', 'cong', 'tong', 'tu', 'wei', 'lun', 'guo', 'qun', 'ri', 'ling', 'gu', 'guo', 'tai', 'guo', 'tu', 'you',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x57.php b/core/lib/Drupal/Component/Transliteration/data/x57.php
index 7983c7a8fe7cfdc95d1e0d3578ca33324e5370ec..f337892b71ebe5499890da9f34d93ddbd425f990 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x57.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x57.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'guo', 'yin', 'hun', 'pu', 'yu', 'han', 'yuan', 'lun', 'quan', 'yu', 'qing', 'guo', 'chuan', 'wei', 'yuan', 'quan',
   0x10 => 'ku', 'fu', 'yuan', 'yuan', 'ya', 'tu', 'tu', 'tu', 'tuan', 'lue', 'hui', 'yi', 'huan', 'luan', 'luan', 'tu',
   0x20 => 'ya', 'tu', 'ting', 'sheng', 'pu', 'lu', 'kuai', 'ya', 'zai', 'wei', 'ge', 'yu', 'wu', 'gui', 'pi', 'yi',
@@ -22,4 +22,4 @@
   0xD0 => 'jin', 'zhe', 'lie', 'lie', 'bu', 'cheng', 'hua', 'bu', 'shi', 'xun', 'guo', 'jiong', 'ye', 'nian', 'di', 'yu',
   0xE0 => 'bu', 'ya', 'quan', 'sui', 'pi', 'qing', 'wan', 'ju', 'lun', 'zheng', 'kong', 'chong', 'dong', 'dai', 'tan', 'an',
   0xF0 => 'cai', 'chu', 'beng', 'kan', 'zhi', 'duo', 'yi', 'zhi', 'yi', 'pei', 'ji', 'zhun', 'qi', 'sao', 'ju', 'ni',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x58.php b/core/lib/Drupal/Component/Transliteration/data/x58.php
index 73a217c730ee1d813e10e4225dca89a1a2367a8f..1e6255580c66698c88dd8210e3163ccac197c9e9 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x58.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x58.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ku', 'ke', 'tang', 'kun', 'ni', 'jian', 'dui', 'jin', 'gang', 'yu', 'e', 'peng', 'gu', 'tu', 'leng', 'fang',
   0x10 => 'ya', 'qian', 'kun', 'an', 'shen', 'duo', 'nao', 'tu', 'cheng', 'yin', 'hun', 'bi', 'lian', 'guo', 'die', 'zhuan',
   0x20 => 'hou', 'bao', 'bao', 'yu', 'di', 'mao', 'jie', 'ruan', 'ye', 'geng', 'kan', 'zong', 'yu', 'huang', 'e', 'yao',
@@ -22,4 +22,4 @@
   0xD0 => 'xi', 'he', 'ai', 'ya', 'dao', 'hao', 'ruan', 'jin', 'lei', 'kuang', 'lu', 'yan', 'tan', 'wei', 'huai', 'long',
   0xE0 => 'long', 'rui', 'li', 'lin', 'rang', 'chan', 'xun', 'yan', 'lei', 'ba', 'wan', 'shi', 'ren', 'san', 'zhuang', 'zhuang',
   0xF0 => 'sheng', 'yi', 'mai', 'ke', 'zhu', 'zhuang', 'hu', 'hu', 'kun', 'yi', 'hu', 'xu', 'kun', 'shou', 'mang', 'zun',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x59.php b/core/lib/Drupal/Component/Transliteration/data/x59.php
index 5755e53b3a1d69c92f2c15395829b5cab0857947..5df464c6add3a5c9158215b817a29fd5103c51b8 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x59.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x59.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'shou', 'yi', 'zhi', 'gu', 'chu', 'jiang', 'feng', 'bei', 'zhai', 'bian', 'sui', 'qun', 'ling', 'fu', 'cuo', 'xia',
   0x10 => 'xiong', 'xie', 'nao', 'xia', 'kui', 'xi', 'wai', 'yuan', 'mao', 'su', 'duo', 'duo', 'ye', 'qing', 'wai', 'gou',
   0x20 => 'gou', 'qi', 'meng', 'meng', 'yin', 'huo', 'chen', 'da', 'ze', 'tian', 'tai', 'fu', 'guai', 'yao', 'yang', 'hang',
@@ -22,4 +22,4 @@
   0xD0 => 'jie', 'gu', 'si', 'xing', 'wei', 'zi', 'ju', 'shan', 'pin', 'ren', 'yao', 'dong', 'jiang', 'shu', 'ji', 'gai',
   0xE0 => 'xiang', 'hua', 'juan', 'jiao', 'gou', 'lao', 'jian', 'jian', 'yi', 'nian', 'zhi', 'ji', 'ji', 'xian', 'heng', 'guang',
   0xF0 => 'jun', 'kua', 'yan', 'ming', 'lie', 'pei', 'e', 'you', 'yan', 'cha', 'shen', 'yin', 'shi', 'gui', 'quan', 'zi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x5a.php b/core/lib/Drupal/Component/Transliteration/data/x5a.php
index 306fce933e45c7cc00a0290fbc53c3dc9cd01bb1..49b18ae92de2353eef56cc86553436fc046c2fbc 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x5a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x5a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'song', 'wei', 'hong', 'wa', 'lou', 'ya', 'rao', 'jiao', 'luan', 'ping', 'xian', 'shao', 'li', 'cheng', 'xie', 'mang',
   0x10 => 'fu', 'suo', 'mei', 'wei', 'ke', 'chuo', 'chuo', 'ting', 'niang', 'xing', 'nan', 'yu', 'na', 'pou', 'nei', 'juan',
   0x20 => 'shen', 'zhi', 'han', 'di', 'zhuang', 'e', 'pin', 'tui', 'xian', 'mian', 'wu', 'yan', 'wu', 'ai', 'yan', 'yu',
@@ -22,4 +22,4 @@
   0xD0 => 'nao', 'bao', 'ai', 'pi', 'pin', 'yi', 'piao', 'yu', 'lei', 'xuan', 'man', 'yi', 'zhang', 'kang', 'yong', 'ni',
   0xE0 => 'li', 'di', 'gui', 'yan', 'jin', 'zhuan', 'chang', 'ze', 'han', 'nen', 'lao', 'mo', 'zhe', 'hu', 'hu', 'ao',
   0xF0 => 'nen', 'qiang', 'ma', 'pie', 'gu', 'wu', 'qiao', 'tuo', 'zhan', 'mao', 'xian', 'xian', 'mo', 'liao', 'lian', 'hua',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x5b.php b/core/lib/Drupal/Component/Transliteration/data/x5b.php
index 8f6c4adffd5760663b6217774935f3b476f54dd1..0c6a1b42a1bec3f0e34f7b56d6a5defb4b037228 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x5b.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x5b.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'gui', 'deng', 'zhi', 'xu', 'yi', 'hua', 'xi', 'kui', 'rao', 'xi', 'yan', 'chan', 'jiao', 'mei', 'fan', 'fan',
   0x10 => 'xian', 'yi', 'hui', 'jiao', 'fu', 'shi', 'bi', 'shan', 'sui', 'qiang', 'lian', 'huan', 'xin', 'niao', 'dong', 'yi',
   0x20 => 'can', 'ai', 'niang', 'ning', 'ma', 'tiao', 'chou', 'jin', 'ci', 'yu', 'pin', 'rong', 'ru', 'nai', 'yan', 'tai',
@@ -22,4 +22,4 @@
   0xD0 => 'mei', 'qin', 'han', 'yu', 'shi', 'ning', 'jin', 'ning', 'zhi', 'yu', 'bao', 'kuan', 'ning', 'qin', 'mo', 'cha',
   0xE0 => 'ju', 'gua', 'qin', 'hu', 'wu', 'liao', 'shi', 'ning', 'zhai', 'shen', 'wei', 'xie', 'kuan', 'hui', 'liao', 'jun',
   0xF0 => 'huan', 'yi', 'yi', 'bao', 'qin', 'chong', 'bao', 'feng', 'cun', 'dui', 'si', 'xun', 'dao', 'lu', 'dui', 'shou',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x5c.php b/core/lib/Drupal/Component/Transliteration/data/x5c.php
index a4173f26b9975db93d78de962d6aa4abb0e07f2d..fd28352019ecb96f23054c2429f6ef208cfeee97 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x5c.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x5c.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'po', 'feng', 'zhuan', 'fu', 'she', 'ke', 'jiang', 'jiang', 'zhuan', 'wei', 'zun', 'xun', 'shu', 'dui', 'dao', 'xiao',
   0x10 => 'jie', 'shao', 'er', 'er', 'er', 'ga', 'jian', 'shu', 'chen', 'shang', 'shang', 'mo', 'ga', 'chang', 'liao', 'xian',
   0x20 => 'xian', 'kun', 'you', 'wang', 'you', 'liao', 'liao', 'yao', 'mang', 'wang', 'wang', 'wang', 'ga', 'yao', 'duo', 'kui',
@@ -22,4 +22,4 @@
   0xD0 => 'gai', 'quan', 'dong', 'yi', 'mu', 'shi', 'an', 'wei', 'huan', 'zhi', 'mi', 'li', 'ji', 'tong', 'wei', 'you',
   0xE0 => 'gu', 'xia', 'li', 'yao', 'jiao', 'zheng', 'luan', 'jiao', 'e', 'e', 'yu', 'xie', 'bu', 'qiao', 'qun', 'feng',
   0xF0 => 'feng', 'nao', 'li', 'you', 'xian', 'hong', 'dao', 'shen', 'cheng', 'tu', 'geng', 'jun', 'hao', 'xia', 'yin', 'yu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x5d.php b/core/lib/Drupal/Component/Transliteration/data/x5d.php
index f6e54155beba89f03b50c88949fcbea388f1cbed..bfa89e1aeac789af316770fc71ce5f6faa142aab 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x5d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x5d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'lang', 'kan', 'lao', 'lai', 'xian', 'que', 'kong', 'chong', 'chong', 'ta', 'lin', 'hua', 'ju', 'lai', 'qi', 'min',
   0x10 => 'kun', 'kun', 'zu', 'gu', 'cui', 'ya', 'ya', 'gang', 'lun', 'lun', 'leng', 'jue', 'duo', 'zheng', 'guo', 'yin',
   0x20 => 'dong', 'han', 'zheng', 'wei', 'xiao', 'pi', 'yan', 'song', 'jie', 'beng', 'zu', 'ku', 'dong', 'zhan', 'gu', 'yin',
@@ -22,4 +22,4 @@
   0xD0 => 'chao', 'cuan', 'luan', 'dian', 'dian', 'nie', 'yan', 'yan', 'yan', 'kui', 'yan', 'chuan', 'kuai', 'chuan', 'zhou', 'huang',
   0xE0 => 'jing', 'xun', 'chao', 'chao', 'lie', 'gong', 'zuo', 'qiao', 'ju', 'gong', 'ju', 'wu', 'pu', 'pu', 'cha', 'qiu',
   0xF0 => 'qiu', 'ji', 'yi', 'si', 'ba', 'zhi', 'zhao', 'xiang', 'yi', 'jin', 'xun', 'juan', 'ba', 'xun', 'jin', 'fu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x5e.php b/core/lib/Drupal/Component/Transliteration/data/x5e.php
index 75c829d2eaedd879c34a048dcad12a41783ab070..5d02629d413b7bfc9e47782b0c06108523a2e31e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x5e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x5e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'za', 'bi', 'shi', 'bu', 'ding', 'shuai', 'fan', 'nie', 'shi', 'fen', 'pa', 'zhi', 'xi', 'hu', 'dan', 'wei',
   0x10 => 'zhang', 'tang', 'dai', 'mo', 'pei', 'pa', 'tie', 'bo', 'lian', 'zhi', 'zhou', 'bo', 'zhi', 'di', 'mo', 'yi',
   0x20 => 'yi', 'ping', 'qia', 'juan', 'ru', 'shuai', 'dai', 'zheng', 'shui', 'qiao', 'zhen', 'shi', 'qun', 'xi', 'bang', 'dai',
@@ -22,4 +22,4 @@
   0xD0 => 'jiu', 'jin', 'ao', 'kuo', 'lou', 'yin', 'liao', 'dai', 'lu', 'yi', 'chu', 'chan', 'tu', 'si', 'xin', 'miao',
   0xE0 => 'chang', 'wu', 'fei', 'guang', 'ku', 'kuai', 'bi', 'qiang', 'xie', 'lin', 'lin', 'liao', 'lu', 'ji', 'ying', 'xian',
   0xF0 => 'ting', 'yong', 'li', 'ting', 'yin', 'xun', 'yan', 'ting', 'di', 'pai', 'jian', 'hui', 'nai', 'hui', 'gong', 'nian',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x5f.php b/core/lib/Drupal/Component/Transliteration/data/x5f.php
index 675ad3ee69ef6df1fe0e667878a981c8ea1a408a..25fe4acd7b1a95c9669641a816e83ed253dca9c5 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x5f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x5f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'kai', 'bian', 'yi', 'qi', 'nong', 'fen', 'ju', 'yan', 'yi', 'zang', 'bi', 'yi', 'yi', 'er', 'san', 'shi',
   0x10 => 'er', 'shi', 'shi', 'gong', 'diao', 'yin', 'hu', 'fu', 'hong', 'wu', 'tui', 'chi', 'jiang', 'ba', 'shen', 'di',
   0x20 => 'zhang', 'jue', 'tao', 'fu', 'di', 'mi', 'xian', 'hu', 'chao', 'nu', 'jing', 'zhen', 'yi', 'mi', 'quan', 'wan',
@@ -22,4 +22,4 @@
   0xD0 => 'tan', 'te', 'te', 'gan', 'qi', 'shi', 'cun', 'zhi', 'wang', 'mang', 'xi', 'fan', 'ying', 'tian', 'min', 'wen',
   0xE0 => 'zhong', 'chong', 'wu', 'ji', 'wu', 'xi', 'jia', 'you', 'wan', 'cong', 'song', 'kuai', 'yu', 'bian', 'zhi', 'qi',
   0xF0 => 'cui', 'chen', 'tai', 'tun', 'qian', 'nian', 'hun', 'xiong', 'niu', 'kuang', 'xian', 'xin', 'kang', 'hu', 'kai', 'fen',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x60.php b/core/lib/Drupal/Component/Transliteration/data/x60.php
index 8186748f436be6a75482ca35bdff1512603a82d4..27467cc9761ee29e7bc6182037c50f5df8dbbe2b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x60.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x60.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'huai', 'tai', 'song', 'wu', 'ou', 'chang', 'chuang', 'ju', 'yi', 'bao', 'chao', 'min', 'pei', 'zuo', 'zen', 'yang',
   0x10 => 'ju', 'ban', 'nu', 'nao', 'zheng', 'pa', 'bu', 'tie', 'hu', 'hu', 'ju', 'da', 'lian', 'si', 'chou', 'di',
   0x20 => 'dai', 'yi', 'tu', 'you', 'fu', 'ji', 'peng', 'xing', 'yuan', 'ni', 'guai', 'fu', 'xi', 'bi', 'you', 'qie',
@@ -22,4 +22,4 @@
   0xD0 => 'yu', 'huo', 'he', 'quan', 'tan', 'ti', 'ti', 'nie', 'wang', 'chuo', 'hu', 'hun', 'xi', 'chang', 'xin', 'wei',
   0xE0 => 'hui', 'e', 'suo', 'zong', 'jian', 'yong', 'dian', 'ju', 'can', 'cheng', 'de', 'bei', 'qie', 'can', 'dan', 'guan',
   0xF0 => 'duo', 'nao', 'yun', 'xiang', 'zhui', 'die', 'huang', 'chun', 'qiong', 're', 'xing', 'ce', 'bian', 'min', 'zong', 'ti',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x61.php b/core/lib/Drupal/Component/Transliteration/data/x61.php
index 21b7a80b226efd56afbe9a5b730ae58f642f2b54..9890aff4aacaf02aa9174ac262c06a67d9224e51 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x61.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x61.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'qiao', 'chou', 'bei', 'xuan', 'wei', 'ge', 'qian', 'wei', 'yu', 'yu', 'bi', 'xuan', 'huan', 'min', 'bi', 'yi',
   0x10 => 'mian', 'yong', 'kai', 'dang', 'yin', 'e', 'chen', 'mao', 'qia', 'ke', 'yu', 'ai', 'qie', 'yan', 'nuo', 'gan',
   0x20 => 'yun', 'zong', 'sai', 'leng', 'fen', 'ying', 'kui', 'kui', 'que', 'gong', 'yun', 'su', 'su', 'qi', 'yao', 'song',
@@ -22,4 +22,4 @@
   0xD0 => 'huai', 'men', 'lan', 'ai', 'lin', 'yan', 'kuo', 'xia', 'chi', 'yu', 'yin', 'dai', 'meng', 'ai', 'meng', 'dui',
   0xE0 => 'qi', 'mo', 'lan', 'men', 'chou', 'zhi', 'nuo', 'nuo', 'yan', 'yang', 'bo', 'zhi', 'kuang', 'kuang', 'you', 'fu',
   0xF0 => 'liu', 'mie', 'cheng', 'hui', 'chan', 'meng', 'lan', 'huai', 'xuan', 'rang', 'chan', 'ji', 'ju', 'huan', 'she', 'yi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x62.php b/core/lib/Drupal/Component/Transliteration/data/x62.php
index 0de5674f2fa9b0ebe41e7984e029681770712a79..9f2315bd41260548a3a3af3f9d54b3cf81f1f055 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x62.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x62.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'lian', 'nan', 'mi', 'tang', 'jue', 'gang', 'gang', 'zhuang', 'ge', 'yue', 'wu', 'jian', 'xu', 'shu', 'rong', 'xi',
   0x10 => 'cheng', 'wo', 'jie', 'ge', 'jian', 'qiang', 'huo', 'qiang', 'zhan', 'dong', 'qi', 'jia', 'die', 'zei', 'jia', 'ji',
   0x20 => 'zhi', 'kan', 'ji', 'kui', 'gai', 'deng', 'zhan', 'qiang', 'ge', 'jian', 'jie', 'yu', 'jian', 'yan', 'lu', 'hu',
@@ -22,4 +22,4 @@
   0xD0 => 'guai', 'qian', 'ju', 'ta', 'ba', 'tuo', 'tuo', 'ao', 'ju', 'zhuo', 'pan', 'zhao', 'bai', 'bai', 'di', 'ni',
   0xE0 => 'ju', 'kuo', 'long', 'jian', 'qia', 'yong', 'lan', 'ning', 'bo', 'ze', 'qian', 'hen', 'kuo', 'shi', 'jie', 'zheng',
   0xF0 => 'nin', 'gong', 'gong', 'quan', 'shuan', 'cun', 'za', 'kao', 'yi', 'xie', 'ce', 'hui', 'pin', 'zhuai', 'shi', 'na',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x63.php b/core/lib/Drupal/Component/Transliteration/data/x63.php
index 9108c93cc170ff5f735733761fcb97546f1690a2..e74aa0feef77fba150b4f93890f60000d68c8d0e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x63.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x63.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'bai', 'chi', 'gua', 'zhi', 'kuo', 'duo', 'duo', 'zhi', 'qie', 'an', 'nong', 'zhen', 'ge', 'jiao', 'kua', 'dong',
   0x10 => 'na', 'tiao', 'lie', 'zha', 'lu', 'die', 'wa', 'jue', 'lie', 'ju', 'zhi', 'luan', 'ya', 'wo', 'ta', 'xie',
   0x20 => 'nao', 'dang', 'jiao', 'zheng', 'ji', 'hui', 'xian', 'yu', 'ai', 'tuo', 'nuo', 'cuo', 'bo', 'geng', 'ti', 'zhen',
@@ -22,4 +22,4 @@
   0xD0 => 'ti', 'nie', 'cha', 'shi', 'zong', 'zhen', 'yi', 'xun', 'yong', 'bian', 'yang', 'huan', 'yan', 'zan', 'an', 'xu',
   0xE0 => 'ya', 'wo', 'ke', 'chuai', 'ji', 'ti', 'la', 'la', 'chen', 'kai', 'jiu', 'jiu', 'tu', 'jie', 'hui', 'gen',
   0xF0 => 'chong', 'xiao', 'die', 'xie', 'yuan', 'qian', 'ye', 'cha', 'zha', 'bei', 'yao', 'wei', 'beng', 'lan', 'wen', 'qin',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x64.php b/core/lib/Drupal/Component/Transliteration/data/x64.php
index 68f1e0577c96f1d44d8e16f0eceed323c61131b3..29e7caa6baaa9629125b91674c8881ffa8d49ea9 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x64.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x64.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'chan', 'ge', 'lou', 'zong', 'geng', 'jiao', 'gou', 'qin', 'rong', 'que', 'chou', 'chuai', 'zhan', 'sun', 'sun', 'bo',
   0x10 => 'chu', 'rong', 'bang', 'cuo', 'sao', 'ke', 'yao', 'dao', 'zhi', 'nu', 'la', 'jian', 'sou', 'qiu', 'gao', 'xian',
   0x20 => 'shuo', 'sang', 'jin', 'mie', 'e', 'chui', 'nuo', 'shan', 'ta', 'zha', 'tang', 'pan', 'ban', 'da', 'li', 'tao',
@@ -22,4 +22,4 @@
   0xD0 => 'huan', 'jie', 'qin', 'kuai', 'dan', 'xie', 'ka', 'pi', 'bai', 'ao', 'ju', 'ye', 'e', 'meng', 'sou', 'mi',
   0xE0 => 'ji', 'tai', 'zhuo', 'dao', 'xing', 'lan', 'ca', 'ju', 'ye', 'ru', 'ye', 'ye', 'ni', 'wo', 'ji', 'bin',
   0xF0 => 'ning', 'ge', 'zhi', 'zhi', 'kuo', 'mo', 'jian', 'xie', 'lie', 'tan', 'bai', 'sou', 'lu', 'lue', 'rao', 'ti',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x65.php b/core/lib/Drupal/Component/Transliteration/data/x65.php
index ff100d4a02a3c4b0c62b0acc8829818a7a2b1814..f8b74f829805fa9cb86c6458916da354cdd521e0 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x65.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x65.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'pan', 'yang', 'lei', 'ca', 'shu', 'zan', 'nian', 'xian', 'jun', 'huo', 'li', 'la', 'huan', 'ying', 'lu', 'long',
   0x10 => 'qian', 'qian', 'zan', 'qian', 'lan', 'xian', 'ying', 'mei', 'rang', 'chan', 'ying', 'cuan', 'xie', 'she', 'luo', 'jun',
   0x20 => 'mi', 'li', 'zan', 'luan', 'tan', 'zuan', 'li', 'dian', 'wa', 'dang', 'jiao', 'jue', 'lan', 'li', 'nang', 'zhi',
@@ -22,4 +22,4 @@
   0xD0 => 'zhao', 'yi', 'liu', 'shao', 'jian', 'yu', 'yi', 'qi', 'zhi', 'fan', 'piao', 'fan', 'zhan', 'kuai', 'sui', 'yu',
   0xE0 => 'wu', 'ji', 'ji', 'ji', 'huo', 'ri', 'dan', 'jiu', 'zhi', 'zao', 'xie', 'tiao', 'xun', 'xu', 'ga', 'la',
   0xF0 => 'gan', 'han', 'tai', 'di', 'xu', 'chan', 'shi', 'kuang', 'yang', 'shi', 'wang', 'min', 'min', 'tun', 'chun', 'wu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x66.php b/core/lib/Drupal/Component/Transliteration/data/x66.php
index edebef0e5959cff3148a2aadc5dcbafd267a3a3b..23aa7d42279e35d0fe07890b8f8f277da4f8172c 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x66.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x66.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yun', 'bei', 'ang', 'ze', 'ban', 'jie', 'kun', 'sheng', 'hu', 'fang', 'hao', 'gui', 'chang', 'xuan', 'ming', 'hun',
   0x10 => 'fen', 'qin', 'hu', 'yi', 'xi', 'xin', 'yan', 'ze', 'fang', 'tan', 'shen', 'ju', 'yang', 'zan', 'bing', 'xing',
   0x20 => 'ying', 'xuan', 'po', 'zhen', 'ling', 'chun', 'hao', 'mei', 'zuo', 'mo', 'bian', 'xu', 'hun', 'zhao', 'zong', 'shi',
@@ -22,4 +22,4 @@
   0xD0 => 'xing', 'shen', 'jiao', 'bao', 'jing', 'yan', 'ai', 'ye', 'ru', 'shu', 'meng', 'xun', 'yao', 'pu', 'li', 'chen',
   0xE0 => 'kuang', 'die', 'liao', 'yan', 'huo', 'lu', 'xi', 'rong', 'long', 'nang', 'luo', 'luan', 'shai', 'tang', 'yan', 'zhu',
   0xF0 => 'yue', 'yue', 'qu', 'ye', 'geng', 'ye', 'hu', 'he', 'shu', 'cao', 'cao', 'sheng', 'man', 'ceng', 'ceng', 'ti',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x67.php b/core/lib/Drupal/Component/Transliteration/data/x67.php
index d0e5d1a8c16477d12af6d1642c421bb0a051e463..2b5e33feb4ed99fe292ee1ff753b0e15468a94e2 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x67.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x67.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'zui', 'can', 'xu', 'hui', 'yin', 'qie', 'fen', 'pi', 'yue', 'you', 'ruan', 'peng', 'fen', 'fu', 'ling', 'fei',
   0x10 => 'qu', 'ti', 'nu', 'tiao', 'shuo', 'zhen', 'lang', 'lang', 'zui', 'ming', 'huang', 'wang', 'tun', 'chao', 'ji', 'qi',
   0x20 => 'ying', 'zong', 'wang', 'tong', 'lang', 'lao', 'meng', 'long', 'mu', 'deng', 'wei', 'mo', 'ben', 'zha', 'shu', 'shu',
@@ -22,4 +22,4 @@
   0xD0 => 'mou', 'gan', 'qi', 'ran', 'rou', 'mao', 'shao', 'song', 'zhe', 'xia', 'you', 'shen', 'gui', 'tuo', 'zha', 'nan',
   0xE0 => 'ning', 'yong', 'di', 'zhi', 'zha', 'cha', 'dan', 'gu', 'bu', 'jiu', 'ao', 'fu', 'jian', 'ba', 'duo', 'ke',
   0xF0 => 'nai', 'zhu', 'bi', 'liu', 'chai', 'shan', 'si', 'chu', 'pei', 'shi', 'guai', 'zha', 'yao', 'cheng', 'jiu', 'shi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x68.php b/core/lib/Drupal/Component/Transliteration/data/x68.php
index 84f944786936996b012805b1e3b91527db7605a8..39662ffa884a43cd13fe0e4313cd26d8ad690383 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x68.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x68.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'zhi', 'liu', 'mei', 'li', 'rong', 'zha', 'zao', 'biao', 'zhan', 'zhi', 'long', 'dong', 'lu', 'sheng', 'li', 'lan',
   0x10 => 'yong', 'shu', 'xun', 'shuan', 'qi', 'zhen', 'qi', 'li', 'yi', 'xiang', 'zhen', 'li', 'se', 'gua', 'kan', 'ben',
   0x20 => 'ren', 'xiao', 'bai', 'ren', 'bing', 'zi', 'chou', 'yi', 'ci', 'xu', 'zhu', 'jian', 'zui', 'er', 'er', 'you',
@@ -22,4 +22,4 @@
   0xD0 => 'fei', 'pai', 'bang', 'bang', 'hun', 'zong', 'cheng', 'zao', 'ji', 'li', 'peng', 'yu', 'yu', 'gu', 'jun', 'dong',
   0xE0 => 'tang', 'gang', 'wang', 'di', 'cuo', 'fan', 'cheng', 'zhan', 'qi', 'yuan', 'yan', 'yu', 'quan', 'yi', 'sen', 'ren',
   0xF0 => 'chui', 'leng', 'qi', 'zhuo', 'fu', 'ke', 'lai', 'zou', 'zou', 'zhao', 'guan', 'fen', 'fen', 'shen', 'qing', 'ni',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x69.php b/core/lib/Drupal/Component/Transliteration/data/x69.php
index fcc08f2819fdbdeafef60c7c422641c43100bb37..4d094cb61f82c1d01dddefc72a1401a6041df7a1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x69.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x69.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'wan', 'guo', 'lu', 'hao', 'jie', 'yi', 'chou', 'ju', 'ju', 'cheng', 'zuo', 'liang', 'qiang', 'zhi', 'chui', 'ya',
   0x10 => 'ju', 'bei', 'jiao', 'zhuo', 'zi', 'bin', 'peng', 'ding', 'chu', 'chang', 'men', 'hua', 'jian', 'gui', 'xi', 'du',
   0x20 => 'qian', 'dao', 'gui', 'dian', 'luo', 'zhi', 'quan', 'ming', 'fu', 'geng', 'peng', 'zhan', 'yi', 'tuo', 'sen', 'duo',
@@ -22,4 +22,4 @@
   0xD0 => 'huai', 'mei', 'xu', 'gang', 'gao', 'zhuo', 'tuo', 'qiao', 'yang', 'dian', 'jia', 'kan', 'zui', 'dao', 'long', 'bin',
   0xE0 => 'zhu', 'sang', 'xi', 'ji', 'lian', 'hui', 'yong', 'qian', 'guo', 'gai', 'gai', 'tuan', 'hua', 'qi', 'sen', 'cui',
   0xF0 => 'peng', 'you', 'hu', 'jiang', 'hu', 'huan', 'gui', 'nie', 'yi', 'gao', 'kang', 'gui', 'gui', 'cao', 'man', 'jin',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x6a.php b/core/lib/Drupal/Component/Transliteration/data/x6a.php
index d5557b843927eb0585395762b9d88fe4a80e6d57..4a34fa639c661370c86aac4d51b170897a013928 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x6a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x6a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'di', 'zhuang', 'le', 'lang', 'chen', 'cong', 'li', 'xiu', 'qing', 'shuang', 'fan', 'tong', 'guan', 'ze', 'su', 'lei',
   0x10 => 'lu', 'liang', 'mi', 'lou', 'chao', 'su', 'ke', 'chu', 'tang', 'biao', 'lu', 'jiu', 'zhe', 'zha', 'shu', 'zhang',
   0x20 => 'man', 'mo', 'niao', 'yang', 'tiao', 'peng', 'zhu', 'sha', 'xi', 'quan', 'heng', 'jian', 'cong', 'ji', 'yan', 'qiang',
@@ -22,4 +22,4 @@
   0xD0 => 'lei', 'lei', 'sa', 'lu', 'li', 'cuan', 'lu', 'mie', 'hui', 'ou', 'lu', 'zhi', 'gao', 'du', 'yuan', 'li',
   0xE0 => 'fei', 'zhuo', 'sou', 'lian', 'jiang', 'chu', 'qing', 'zhu', 'lu', 'yan', 'li', 'zhu', 'chen', 'jie', 'e', 'su',
   0xF0 => 'huai', 'nie', 'yu', 'long', 'lai', 'jiao', 'xian', 'gui', 'ju', 'xiao', 'ling', 'ying', 'jian', 'yin', 'you', 'ying',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x6b.php b/core/lib/Drupal/Component/Transliteration/data/x6b.php
index 98dbdd198a6178e601b6f7db5496ebffba25cfc2..0df0329384acd3be7463be137dfcd818529c3cc6 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x6b.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x6b.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'xiang', 'nong', 'bo', 'chan', 'lan', 'ju', 'shuang', 'she', 'wei', 'cong', 'quan', 'qu', 'cang', 'jiu', 'yu', 'luo',
   0x10 => 'li', 'cuan', 'luan', 'dang', 'jue', 'yan', 'lan', 'lan', 'zhu', 'lei', 'li', 'ba', 'nang', 'yu', 'ling', 'guang',
   0x20 => 'qian', 'ci', 'huan', 'xin', 'yu', 'yi', 'qian', 'ou', 'xu', 'chao', 'chu', 'qi', 'kai', 'yi', 'jue', 'xi',
@@ -22,4 +22,4 @@
   0xD0 => 'ai', 'jie', 'du', 'yu', 'bi', 'bi', 'bi', 'pi', 'pi', 'bi', 'chan', 'mao', 'hao', 'cai', 'pi', 'lie',
   0xE0 => 'jia', 'zhan', 'sai', 'mu', 'tuo', 'xun', 'er', 'rong', 'xian', 'ju', 'mu', 'hao', 'qiu', 'dou', 'sha', 'tan',
   0xF0 => 'pei', 'ju', 'duo', 'cui', 'bi', 'san', 'san', 'mao', 'sai', 'shu', 'yu', 'tuo', 'he', 'jian', 'ta', 'san',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x6c.php b/core/lib/Drupal/Component/Transliteration/data/x6c.php
index 37501ff6187160eedbefa510f31a3624c0f1a590..52c6c42a3fed0852bd128f057dae4aa167a7d32f 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x6c.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x6c.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'lu', 'mu', 'mao', 'tong', 'rong', 'chang', 'pu', 'lu', 'zhan', 'sao', 'zhan', 'meng', 'lu', 'qu', 'die', 'shi',
   0x10 => 'di', 'min', 'jue', 'mang', 'qi', 'pie', 'nai', 'qi', 'dao', 'xian', 'chuan', 'fen', 'yang', 'nei', 'bin', 'fu',
   0x20 => 'shen', 'dong', 'qing', 'qi', 'yin', 'xi', 'hai', 'yang', 'an', 'ya', 'ke', 'qing', 'ya', 'dong', 'dan', 'lu',
@@ -22,4 +22,4 @@
   0xD0 => 'le', 'you', 'gu', 'hong', 'gan', 'fa', 'mao', 'si', 'hu', 'ping', 'ci', 'fan', 'zhi', 'su', 'ning', 'cheng',
   0xE0 => 'ling', 'pao', 'bo', 'qi', 'si', 'ni', 'ju', 'sa', 'zhu', 'sheng', 'lei', 'xuan', 'jue', 'fu', 'pan', 'min',
   0xF0 => 'tai', 'yang', 'ji', 'yong', 'guan', 'beng', 'xue', 'long', 'lu', 'dan', 'luo', 'xie', 'po', 'ze', 'jing', 'yin',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x6d.php b/core/lib/Drupal/Component/Transliteration/data/x6d.php
index 7c0efb343bc7acb352e80a805aed86ff991fc69b..db015464a1cdaca522a77e3ccc16e4cb41861e67 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x6d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x6d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'pan', 'jie', 'yi', 'hui', 'hui', 'zai', 'cheng', 'yin', 'wei', 'hou', 'jian', 'yang', 'lie', 'si', 'ji', 'er',
   0x10 => 'xing', 'fu', 'sa', 'se', 'zhi', 'yin', 'wu', 'xi', 'kao', 'zhu', 'jiang', 'luo', 'luo', 'an', 'dong', 'ti',
   0x20 => 'mou', 'lei', 'yi', 'mi', 'quan', 'jin', 'po', 'wei', 'xiao', 'xie', 'hong', 'xu', 'su', 'kuang', 'tao', 'qie',
@@ -22,4 +22,4 @@
   0xD0 => 'chang', 'shu', 'qi', 'fang', 'zhi', 'lu', 'nao', 'ju', 'tao', 'cong', 'lei', 'zhe', 'ping', 'fei', 'song', 'tian',
   0xE0 => 'pi', 'dan', 'yu', 'ni', 'yu', 'lu', 'gan', 'mi', 'jing', 'ling', 'lun', 'yin', 'cui', 'qu', 'huai', 'yu',
   0xF0 => 'nian', 'shen', 'biao', 'chun', 'hu', 'yuan', 'lai', 'hun', 'qing', 'yan', 'qian', 'tian', 'miao', 'zhi', 'yin', 'mi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x6e.php b/core/lib/Drupal/Component/Transliteration/data/x6e.php
index 50c7e503da4f1c49422b7681880048d3e12f0805..ea795fe92448d03d3b3f5757bf980df898b5a398 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x6e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x6e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ben', 'yuan', 'wen', 'ruo', 'fei', 'qing', 'yuan', 'ke', 'ji', 'she', 'yuan', 'se', 'lu', 'zi', 'du', 'qi',
   0x10 => 'jian', 'mian', 'pi', 'xi', 'yu', 'yuan', 'shen', 'shen', 'rou', 'huan', 'zhu', 'jian', 'nuan', 'yu', 'qiu', 'ting',
   0x20 => 'qu', 'du', 'fan', 'zha', 'bo', 'wo', 'wo', 'di', 'wei', 'wen', 'ru', 'xie', 'ce', 'wei', 'he', 'gang',
@@ -22,4 +22,4 @@
   0xD0 => 'jie', 'hua', 'ge', 'zi', 'tao', 'teng', 'sui', 'bi', 'jiao', 'hui', 'gun', 'yin', 'gao', 'long', 'zhi', 'yan',
   0xE0 => 'she', 'man', 'ying', 'chun', 'lu', 'lan', 'luan', 'xiao', 'bin', 'tan', 'yu', 'xiu', 'hu', 'bi', 'biao', 'zhi',
   0xF0 => 'jiang', 'kou', 'shen', 'shang', 'di', 'mi', 'ao', 'lu', 'hu', 'hu', 'you', 'chan', 'fan', 'yong', 'gun', 'man',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x6f.php b/core/lib/Drupal/Component/Transliteration/data/x6f.php
index bcb08f819b441d0fefc46e0f02d2779c3fe83ac6..1b63e5c949e27b78b97fd54c09ecc333032f698b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x6f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x6f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'qing', 'yu', 'piao', 'ji', 'ya', 'chao', 'qi', 'xi', 'ji', 'lu', 'lou', 'long', 'jin', 'guo', 'cong', 'lou',
   0x10 => 'zhi', 'gai', 'qiang', 'li', 'yan', 'cao', 'jiao', 'cong', 'chun', 'tuan', 'ou', 'teng', 'ye', 'xi', 'mi', 'tang',
   0x20 => 'mo', 'shang', 'han', 'lian', 'lan', 'wa', 'chi', 'gan', 'feng', 'xuan', 'yi', 'man', 'zi', 'mang', 'kang', 'luo',
@@ -22,4 +22,4 @@
   0xD0 => 'zhu', 'lai', 'bin', 'lian', 'mi', 'shi', 'shu', 'mi', 'ning', 'ying', 'ying', 'meng', 'jin', 'qi', 'bi', 'ji',
   0xE0 => 'hao', 'ru', 'cui', 'wo', 'tao', 'yin', 'yin', 'dui', 'ci', 'huo', 'jing', 'lan', 'jun', 'ai', 'pu', 'zhuo',
   0xF0 => 'wei', 'bin', 'gu', 'qian', 'ying', 'bin', 'kuo', 'fei', 'cang', 'me', 'jian', 'wei', 'luo', 'zan', 'lu', 'li',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x70.php b/core/lib/Drupal/Component/Transliteration/data/x70.php
index a04c26a87d082ba5d869153922cf61896714b8b2..6b837726d4adf6a714510ebcdc3a3f0efe5dd113 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x70.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x70.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'you', 'yang', 'lu', 'si', 'zhi', 'ying', 'du', 'wang', 'hui', 'xie', 'pan', 'shen', 'biao', 'chan', 'mo', 'liu',
   0x10 => 'jian', 'pu', 'se', 'cheng', 'gu', 'bin', 'huo', 'xian', 'lu', 'qin', 'han', 'ying', 'rong', 'li', 'jing', 'xiao',
   0x20 => 'ying', 'sui', 'wei', 'xie', 'huai', 'xue', 'zhu', 'long', 'lai', 'dui', 'fan', 'hu', 'lai', 'shu', 'ling', 'ying',
@@ -22,4 +22,4 @@
   0xD0 => 'zhou', 'yao', 'shi', 'wei', 'tong', 'mie', 'zai', 'kai', 'hong', 'lao', 'xia', 'zhu', 'xuan', 'zheng', 'po', 'yan',
   0xE0 => 'hui', 'guang', 'che', 'hui', 'kao', 'chen', 'fan', 'shao', 'ye', 'hui', NULL, 'tang', 'jin', 're', 'lie', 'xi',
   0xF0 => 'fu', 'jiong', 'xie', 'pu', 'ting', 'zhuo', 'ting', 'wan', 'hai', 'peng', 'lang', 'yan', 'xu', 'feng', 'chi', 'rong',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x71.php b/core/lib/Drupal/Component/Transliteration/data/x71.php
index bec4af6ae129ab1ffe1732c18b5be187e81454f2..df33f2f01e2e2a78b22aa33d6095321e17681eac 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x71.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x71.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'hu', 'xi', 'shu', 'he', 'xun', 'ku', 'juan', 'xiao', 'xi', 'yan', 'han', 'zhuang', 'jun', 'di', 'xie', 'ji',
   0x10 => 'wu', 'yan', 'lu', 'han', 'yan', 'huan', 'men', 'ju', 'dao', 'bei', 'fen', 'lin', 'kun', 'hun', 'tun', 'xi',
   0x20 => 'cui', 'wu', 'hong', 'chao', 'fu', 'wo', 'jiao', 'cong', 'feng', 'ping', 'qiong', 'ruo', 'xi', 'qiong', 'xin', 'chao',
@@ -22,4 +22,4 @@
   0xD0 => 'lin', 'tong', 'shao', 'fen', 'fan', 'yan', 'xun', 'lan', 'mei', 'tang', 'yi', 'jing', 'men', 'jing', 'jiao', 'ying',
   0xE0 => 'yu', 'yi', 'xue', 'lan', 'tai', 'zao', 'can', 'sui', 'xi', 'que', 'cong', 'lian', 'hui', 'zhu', 'xie', 'ling',
   0xF0 => 'wei', 'yi', 'xie', 'zhao', 'hui', 'da', 'nong', 'lan', 'ru', 'xian', 'kao', 'xun', 'jin', 'chou', 'dao', 'yao',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x72.php b/core/lib/Drupal/Component/Transliteration/data/x72.php
index bea999b7df33cb86ac77d250011529113c7044aa..7a84a0c385257daa2c030f42fc5b77c883c136f4 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x72.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x72.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'he', 'lan', 'biao', 'rong', 'li', 'mo', 'bao', 'ruo', 'lu', 'la', 'ao', 'xun', 'kuang', 'shuo', 'liao', 'li',
   0x10 => 'lu', 'jue', 'liao', 'yan', 'xi', 'xie', 'long', 'ye', 'can', 'rang', 'yue', 'lan', 'cong', 'jue', 'chong', 'guan',
   0x20 => 'ju', 'che', 'mi', 'tang', 'lan', 'zhu', 'lan', 'ling', 'cuan', 'yu', 'zhao', 'zhao', 'pa', 'zheng', 'pao', 'cheng',
@@ -22,4 +22,4 @@
   0xD0 => 'hu', 'ling', 'fei', 'pi', 'ni', 'yao', 'you', 'gou', 'xue', 'ju', 'dan', 'bo', 'ku', 'xian', 'ning', 'huan',
   0xE0 => 'hen', 'jiao', 'he', 'zhao', 'ji', 'xun', 'shan', 'ta', 'rong', 'shou', 'tong', 'lao', 'du', 'xia', 'shi', 'kuai',
   0xF0 => 'zheng', 'yu', 'sun', 'yu', 'bi', 'mang', 'xi', 'juan', 'li', 'xia', 'yin', 'suan', 'lang', 'bei', 'zhi', 'yan',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x73.php b/core/lib/Drupal/Component/Transliteration/data/x73.php
index 237fe058e6699b195843b6eecf14cf729c4e87e5..62f3521ff86870b0e495741cf26efe5e72541ed2 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x73.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x73.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'sha', 'li', 'han', 'xian', 'jing', 'pai', 'fei', 'xiao', 'bai', 'qi', 'ni', 'biao', 'yin', 'lai', 'lie', 'jian',
   0x10 => 'qiang', 'kun', 'yan', 'guo', 'zong', 'mi', 'chang', 'yi', 'zhi', 'zheng', 'ya', 'meng', 'cai', 'cu', 'she', 'lie',
   0x20 => 'dian', 'luo', 'hu', 'zong', 'gui', 'wei', 'feng', 'wo', 'yuan', 'xing', 'zhu', 'mao', 'wei', 'chuan', 'xian', 'tuan',
@@ -22,4 +22,4 @@
   0xD0 => 'fa', 'long', 'jin', 'jiao', 'jian', 'li', 'guang', 'xian', 'zhou', 'gong', 'yan', 'xiu', 'yang', 'xu', 'luo', 'su',
   0xE0 => 'zhu', 'qin', 'yin', 'xun', 'bao', 'er', 'xiang', 'yao', 'xia', 'hang', 'gui', 'chong', 'xu', 'ban', 'pei', 'lao',
   0xF0 => 'dang', 'ying', 'hui', 'wen', 'e', 'cheng', 'di', 'wu', 'wu', 'cheng', 'jun', 'mei', 'bei', 'ting', 'xian', 'chu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x74.php b/core/lib/Drupal/Component/Transliteration/data/x74.php
index e94a71c0440ee7081056d6693a394c7362a2b0f6..c7d14a4a3515952f3c13b84d7fa8730791bf9116 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x74.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x74.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'han', 'xuan', 'yan', 'qiu', 'xuan', 'lang', 'li', 'xiu', 'fu', 'liu', 'ya', 'xi', 'ling', 'li', 'jin', 'lian',
   0x10 => 'suo', 'suo', 'feng', 'wan', 'dian', 'pin', 'zhan', 'se', 'min', 'yu', 'ju', 'chen', 'lai', 'wen', 'sheng', 'wei',
   0x20 => 'tian', 'chu', 'zuo', 'beng', 'cheng', 'hu', 'qi', 'e', 'kun', 'chang', 'qi', 'beng', 'wan', 'lu', 'cong', 'guan',
@@ -22,4 +22,4 @@
   0xD0 => 'lu', 'li', 'zan', 'lan', 'ying', 'mi', 'xiang', 'qiong', 'guan', 'dao', 'zan', 'huan', 'gua', 'bo', 'die', 'bo',
   0xE0 => 'hu', 'zhi', 'piao', 'ban', 'rang', 'li', 'wa', 'Dekaguramu ', 'xiang', 'qian', 'ban', 'pen', 'fang', 'dan', 'weng', 'ou',
   0xF0 => 'Deshiguramu ', 'Miriguramu ', 'wa', 'hu', 'ling', 'yi', 'ping', 'ci', 'bai', 'juan', 'chang', 'chi', 'Sarake ', 'dang', 'meng', 'bu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x75.php b/core/lib/Drupal/Component/Transliteration/data/x75.php
index fd88d444feaff92af1109851b52ca8d02aaf95e7..5db5531a79814f323c7e5efaad43c33cce72e12b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x75.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x75.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'zhui', 'ping', 'bian', 'zhou', 'zhen', 'Senchigura ', 'ci', 'ying', 'qi', 'xian', 'lou', 'di', 'ou', 'meng', 'zhuan', 'beng',
   0x10 => 'lin', 'zeng', 'wu', 'pi', 'dan', 'weng', 'ying', 'yan', 'gan', 'dai', 'shen', 'tian', 'tian', 'han', 'chang', 'sheng',
   0x20 => 'qing', 'shen', 'chan', 'chan', 'rui', 'sheng', 'su', 'shen', 'yong', 'shuai', 'lu', 'fu', 'yong', 'beng', 'feng', 'ning',
@@ -22,4 +22,4 @@
   0xD0 => 'hui', 'tan', 'yang', 'chi', 'zhi', 'hen', 'ya', 'mei', 'dou', 'jing', 'xiao', 'tong', 'tu', 'mang', 'pi', 'xiao',
   0xE0 => 'suan', 'fu', 'li', 'zhi', 'cuo', 'duo', 'wu', 'sha', 'lao', 'shou', 'huan', 'xian', 'yi', 'beng', 'zhang', 'guan',
   0xF0 => 'tan', 'fei', 'ma', 'lin', 'chi', 'ji', 'tian', 'an', 'chi', 'bi', 'bi', 'min', 'gu', 'dui', 'e', 'wei',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x76.php b/core/lib/Drupal/Component/Transliteration/data/x76.php
index abfbd36d8a1e9112be183befeec1cad9ccfac248..eb3eafa148ca66e2f7954dae3a3280f7e9876dce 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x76.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x76.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yu', 'cui', 'ya', 'zhu', 'cu', 'dan', 'shen', 'zhong', 'chi', 'yu', 'hou', 'feng', 'la', 'yang', 'chen', 'tu',
   0x10 => 'yu', 'guo', 'wen', 'huan', 'ku', 'jia', 'yin', 'yi', 'lou', 'sao', 'jue', 'chi', 'xi', 'guan', 'yi', 'wen',
   0x20 => 'ji', 'chuang', 'ban', 'hui', 'liu', 'chai', 'shou', 'nue', 'dian', 'da', 'bie', 'tan', 'zhang', 'biao', 'shen', 'cu',
@@ -22,4 +22,4 @@
   0xD0 => 'yan', 'jian', 'he', 'yu', 'kui', 'fan', 'gai', 'dao', 'pan', 'fu', 'qiu', 'sheng', 'dao', 'lu', 'zhan', 'meng',
   0xE0 => 'li', 'jin', 'xu', 'jian', 'pan', 'guan', 'an', 'lu', 'xu', 'zhou', 'dang', 'an', 'gu', 'li', 'mu', 'ding',
   0xF0 => 'gan', 'xu', 'mang', 'wang', 'zhi', 'qi', 'yuan', 'tian', 'xiang', 'dun', 'xin', 'xi', 'pan', 'feng', 'dun', 'min',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x77.php b/core/lib/Drupal/Component/Transliteration/data/x77.php
index 6a6c4b985f326e0151eed0f1531c9c93c6e5f7ad..ecde8bb8fd71b79f96d3e1df5633bbf72f5d7d4e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x77.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x77.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ming', 'sheng', 'shi', 'yun', 'mian', 'pan', 'fang', 'miao', 'dan', 'mei', 'mao', 'kan', 'xian', 'kou', 'shi', 'yang',
   0x10 => 'zheng', 'yao', 'shen', 'huo', 'da', 'zhen', 'kuang', 'ju', 'shen', 'yi', 'sheng', 'mei', 'mo', 'zhu', 'zhen', 'zhen',
   0x20 => 'mian', 'shi', 'yuan', 'die', 'ni', 'zi', 'zi', 'chao', 'zha', 'xuan', 'bing', 'mi', 'long', 'sui', 'tong', 'mi',
@@ -22,4 +22,4 @@
   0xD0 => 'huo', 'lu', 'meng', 'long', 'guan', 'man', 'xi', 'chu', 'tang', 'kan', 'zhu', 'mao', 'jin', 'lin', 'yu', 'shuo',
   0xE0 => 'ze', 'jue', 'shi', 'yi', 'shen', 'zhi', 'hou', 'shen', 'ying', 'ju', 'zhou', 'jiao', 'cuo', 'duan', 'ai', 'jiao',
   0xF0 => 'zeng', 'yue', 'ba', 'shi', 'ding', 'qi', 'ji', 'zi', 'gan', 'wu', 'zhe', 'ku', 'gang', 'xi', 'fan', 'kuang',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x78.php b/core/lib/Drupal/Component/Transliteration/data/x78.php
index b7e4041c09590ebab8e0a10221b990bdff5f7976..c79005b68ffd3479ecde56163cc4eda95ab32128 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x78.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x78.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'dang', 'ma', 'sha', 'dan', 'jue', 'li', 'fu', 'min', 'e', 'huo', 'kang', 'zhi', 'qi', 'kan', 'jie', 'bin',
   0x10 => 'e', 'ya', 'pi', 'zhe', 'yan', 'sui', 'zhuan', 'che', 'dun', 'pan', 'yan', 'jin', 'feng', 'fa', 'mo', 'zha',
   0x20 => 'ju', 'yu', 'ke', 'tuo', 'tuo', 'di', 'zhai', 'zhen', 'e', 'fu', 'mu', 'zhu', 'la', 'bian', 'nu', 'ping',
@@ -22,4 +22,4 @@
   0xD0 => 'pan', 'wei', 'yun', 'dui', 'zhe', 'ke', 'la', 'zhuan', 'qing', 'gun', 'zhuan', 'chan', 'qi', 'ao', 'peng', 'liu',
   0xE0 => 'lu', 'kan', 'chuang', 'chen', 'yin', 'lei', 'biao', 'qi', 'mo', 'qi', 'cui', 'zong', 'qing', 'chuo', 'lun', 'ji',
   0xF0 => 'shan', 'lao', 'qu', 'zeng', 'deng', 'jian', 'xi', 'lin', 'ding', 'tan', 'huang', 'pan', 'za', 'qiao', 'di', 'li',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x79.php b/core/lib/Drupal/Component/Transliteration/data/x79.php
index 77915644f3d2e5e1f3f025cafdb88933927ee281..babcfd2ff78e079ef373ff85f0c46ededaef1045 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x79.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x79.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'jian', 'jiao', 'xi', 'zhang', 'qiao', 'dun', 'jian', 'yu', 'zhui', 'he', 'ke', 'ze', 'lei', 'ke', 'chu', 'ye',
   0x10 => 'que', 'dang', 'yi', 'jiang', 'pi', 'pi', 'yu', 'pin', 'e', 'ai', 'ke', 'jian', 'yu', 'ruan', 'meng', 'pao',
   0x20 => 'ci', 'bo', 'yang', 'ma', 'ca', 'xian', 'kuang', 'lei', 'lei', 'zhi', 'li', 'li', 'fan', 'que', 'pao', 'ying',
@@ -22,4 +22,4 @@
   0xD0 => 'yun', 'ke', 'miao', 'zhi', 'jing', 'bi', 'zhi', 'yu', 'mi', 'ku', 'ban', 'pi', 'ni', 'li', 'you', 'zu',
   0xE0 => 'pi', 'bo', 'ling', 'mo', 'cheng', 'nian', 'qin', 'yang', 'zuo', 'zhi', 'zhi', 'shu', 'ju', 'zi', 'huo', 'ji',
   0xF0 => 'cheng', 'tong', 'zhi', 'huo', 'he', 'yin', 'zi', 'zhi', 'jie', 'ren', 'du', 'yi', 'zhu', 'hui', 'nong', 'fu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x7a.php b/core/lib/Drupal/Component/Transliteration/data/x7a.php
index db12d9b369fa45bea48893498cf937689fe01d0a..eebb25760a6ff8c44fa722eaa5941b60fd73298b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x7a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x7a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'xi', 'kao', 'lang', 'fu', 'xun', 'shui', 'lu', 'kun', 'gan', 'jing', 'ti', 'cheng', 'tu', 'shao', 'shui', 'ya',
   0x10 => 'lun', 'lu', 'gu', 'zuo', 'ren', 'zhun', 'bang', 'bai', 'ji', 'zhi', 'zhi', 'kun', 'leng', 'peng', 'ke', 'bing',
   0x20 => 'chou', 'zui', 'yu', 'su', 'lue', 'xiang', 'yi', 'xi', 'bian', 'ji', 'fu', 'pi', 'nuo', 'jie', 'zhong', 'zong',
@@ -22,4 +22,4 @@
   0xD0 => 'chu', 'hong', 'qi', 'hao', 'sheng', 'fen', 'shu', 'miao', 'qu', 'zhan', 'zhu', 'ling', 'long', 'bing', 'jing', 'jing',
   0xE0 => 'zhang', 'bai', 'si', 'jun', 'hong', 'tong', 'song', 'jing', 'diao', 'yi', 'shu', 'jing', 'qu', 'jie', 'ping', 'duan',
   0xF0 => 'shao', 'zhuan', 'ceng', 'deng', 'cun', 'wai', 'jing', 'kan', 'jing', 'zhu', 'zhu', 'le', 'peng', 'yu', 'chi', 'gan',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x7b.php b/core/lib/Drupal/Component/Transliteration/data/x7b.php
index 9db59111a62e4e53a203b5ecfa67a23c39d971da..29d7b03450b1e9d8d84cd08e8bc2798d9768ddf8 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x7b.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x7b.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'mang', 'zhu', 'wan', 'du', 'ji', 'xiao', 'ba', 'suan', 'ji', 'qin', 'zhao', 'sun', 'ya', 'zhui', 'yuan', 'hu',
   0x10 => 'hang', 'xiao', 'cen', 'bi', 'bi', 'jian', 'yi', 'dong', 'shan', 'sheng', 'da', 'di', 'zhu', 'na', 'chi', 'gu',
   0x20 => 'li', 'qie', 'min', 'bao', 'tiao', 'si', 'fu', 'ce', 'ben', 'pei', 'da', 'zi', 'di', 'ling', 'ze', 'nu',
@@ -22,4 +22,4 @@
   0xD0 => 'gu', 'kui', 'shi', 'lou', 'yun', 'he', 'tang', 'yue', 'chou', 'gao', 'fei', 'ruo', 'zheng', 'gou', 'nie', 'qian',
   0xE0 => 'xiao', 'cuan', 'long', 'peng', 'du', 'li', 'bi', 'zhuo', 'chu', 'shai', 'chi', 'zhu', 'qiang', 'long', 'lan', 'jian',
   0xF0 => 'bu', 'li', 'hui', 'bi', 'di', 'cong', 'yan', 'peng', 'can', 'zhuan', 'pi', 'piao', 'dou', 'yu', 'mie', 'tuan',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x7c.php b/core/lib/Drupal/Component/Transliteration/data/x7c.php
index 49aa0a667c44b2b79a90d4caeda98576d5b5e39b..3fff1c7a02ae34253027ae295276b008ebf691f8 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x7c.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x7c.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ze', 'shai', 'gui', 'yi', 'hu', 'chan', 'kou', 'cu', 'ping', 'zao', 'ji', 'gui', 'su', 'lou', 'ce', 'lu',
   0x10 => 'nian', 'suo', 'cuan', 'diao', 'suo', 'le', 'duan', 'liang', 'xiao', 'bo', 'mi', 'shai', 'dang', 'liao', 'dan', 'dian',
   0x20 => 'fu', 'jian', 'min', 'kui', 'dai', 'jiao', 'deng', 'huang', 'sun', 'lao', 'zan', 'xiao', 'lu', 'shi', 'zan', 'qi',
@@ -22,4 +22,4 @@
   0xD0 => 'fu', 'nuo', 'bei', 'gu', 'xiu', 'gao', 'tang', 'qiu', 'jia', 'cao', 'zhuang', 'tang', 'mi', 'san', 'fen', 'zao',
   0xE0 => 'kang', 'jiang', 'mo', 'san', 'san', 'nuo', 'xi', 'liang', 'jiang', 'kuai', 'bo', 'huan', 'shu', 'zong', 'xian', 'nuo',
   0xF0 => 'tuan', 'nie', 'li', 'zuo', 'di', 'nie', 'tiao', 'lan', 'mi', 'si', 'jiu', 'xi', 'gong', 'zheng', 'jiu', 'you',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x7d.php b/core/lib/Drupal/Component/Transliteration/data/x7d.php
index 1cfdab205f37bf95dcc4d9e89e583acf38fd64e4..352293d3b518f1b3c06d5f67b213eda832c29f1d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x7d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x7d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ji', 'cha', 'zhou', 'xun', 'yue', 'hong', 'yu', 'he', 'wan', 'ren', 'wen', 'wen', 'qiu', 'na', 'zi', 'tou',
   0x10 => 'niu', 'fou', 'ji', 'shu', 'chun', 'pi', 'zhen', 'sha', 'hong', 'zhi', 'ji', 'fen', 'yun', 'ren', 'dan', 'jin',
   0x20 => 'su', 'fang', 'suo', 'cui', 'jiu', 'za', 'ba', 'jin', 'fu', 'zhi', 'ci', 'zi', 'chou', 'hong', 'za', 'lei',
@@ -22,4 +22,4 @@
   0xD0 => 'fan', 'lu', 'xu', 'ying', 'shang', 'qi', 'xu', 'xiang', 'jian', 'ke', 'xian', 'ruan', 'mian', 'ji', 'duan', 'chong',
   0xE0 => 'di', 'min', 'miao', 'yuan', 'xie', 'bao', 'si', 'qiu', 'bian', 'huan', 'geng', 'cong', 'mian', 'wei', 'fu', 'wei',
   0xF0 => 'tou', 'gou', 'miao', 'xie', 'lian', 'zong', 'bian', 'yun', 'yin', 'ti', 'gua', 'zhi', 'yun', 'cheng', 'chan', 'dai',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x7e.php b/core/lib/Drupal/Component/Transliteration/data/x7e.php
index e66acc5bbab109e393ce33f9cf4d06ab793f6587..a278c2d1911f7edf4b3baa9a9858fe44f571be1b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x7e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x7e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'xia', 'yuan', 'zong', 'xu', 'ying', 'wei', 'geng', 'xuan', 'ying', 'jin', 'yi', 'zhui', 'ni', 'bang', 'gu', 'pan',
   0x10 => 'zhou', 'jian', 'ci', 'quan', 'shuang', 'yun', 'xia', 'cui', 'xi', 'rong', 'tao', 'fu', 'yun', 'chen', 'gao', 'ru',
   0x20 => 'hu', 'zai', 'teng', 'xian', 'su', 'zhen', 'zong', 'tao', 'huang', 'cai', 'bi', 'feng', 'cu', 'li', 'suo', 'yan',
@@ -22,4 +22,4 @@
   0xD0 => 'dai', 'bang', 'rong', 'jie', 'ku', 'rao', 'die', 'hang', 'hui', 'gei', 'xuan', 'jiang', 'luo', 'jue', 'jiao', 'tong',
   0xE0 => 'geng', 'xiao', 'juan', 'xiu', 'xi', 'sui', 'tao', 'ji', 'ti', 'ji', 'xu', 'ling', 'ying', 'xu', 'qi', 'fei',
   0xF0 => 'chuo', 'shang', 'gun', 'sheng', 'wei', 'mian', 'shou', 'beng', 'chou', 'tao', 'liu', 'quan', 'zong', 'zhan', 'wan', 'lu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x7f.php b/core/lib/Drupal/Component/Transliteration/data/x7f.php
index 7f586dd130539bbe5ef12b882df96f3e2b69c387..78e32434d55d1279264df337c49316a0adaecf21 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x7f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x7f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'zhui', 'zi', 'ke', 'xiang', 'jian', 'mian', 'lan', 'ti', 'miao', 'ji', 'yun', 'hui', 'si', 'duo', 'duan', 'bian',
   0x10 => 'xian', 'gou', 'zhui', 'huan', 'di', 'lu', 'bian', 'min', 'yuan', 'jin', 'fu', 'ru', 'zhen', 'feng', 'cui', 'gao',
   0x20 => 'chan', 'li', 'yi', 'jian', 'bin', 'piao', 'man', 'lei', 'ying', 'suo', 'mou', 'sao', 'xie', 'liao', 'shan', 'zeng',
@@ -22,4 +22,4 @@
   0xD0 => 'zhi', 'qu', 'xi', 'xie', 'xiang', 'xi', 'xi', 'ke', 'qiao', 'hui', 'hui', 'xiao', 'sha', 'hong', 'jiang', 'di',
   0xE0 => 'cui', 'fei', 'dao', 'sha', 'chi', 'zhu', 'jian', 'xuan', 'chi', 'pian', 'zong', 'wan', 'hui', 'hou', 'he', 'he',
   0xF0 => 'han', 'ao', 'piao', 'yi', 'lian', 'hou', 'ao', 'lin', 'pen', 'qiao', 'ao', 'fan', 'yi', 'hui', 'xuan', 'dao',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x80.php b/core/lib/Drupal/Component/Transliteration/data/x80.php
index 33b80ca74817e591d3ebcb7104eb73a58df6f584..0cbf2aae1418ed23ce8d97ec0af0b9dbda22c5e3 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x80.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x80.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yao', 'lao', 'lao', 'kao', 'mao', 'zhe', 'qi', 'gou', 'gou', 'gou', 'die', 'die', 'er', 'shua', 'ruan', 'nai',
   0x10 => 'nai', 'duan', 'lei', 'ting', 'zi', 'geng', 'chao', 'hao', 'yun', 'ba', 'pi', 'yi', 'si', 'qu', 'jia', 'ju',
   0x20 => 'huo', 'chu', 'lao', 'lun', 'ji', 'tang', 'ou', 'lou', 'nou', 'jiang', 'pang', 'zha', 'lou', 'ji', 'lao', 'huo',
@@ -22,4 +22,4 @@
   0xD0 => 'ku', 'zhi', 'ni', 'ping', 'zi', 'fu', 'pang', 'zhen', 'xian', 'zuo', 'pei', 'jia', 'sheng', 'zhi', 'bao', 'mu',
   0xE0 => 'qu', 'hu', 'ke', 'chi', 'yin', 'xu', 'yang', 'long', 'dong', 'ka', 'lu', 'jing', 'nu', 'yan', 'pang', 'kua',
   0xF0 => 'yi', 'guang', 'hai', 'ge', 'dong', 'chi', 'jiao', 'xiong', 'xiong', 'er', 'an', 'heng', 'pian', 'neng', 'zi', 'gui',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x81.php b/core/lib/Drupal/Component/Transliteration/data/x81.php
index 81fb4245e829e5fc057651f9c5e6446f2c82dfa2..dd5afc1e552154f29d6067d2288048d0ff69b1fb 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x81.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x81.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'cheng', 'tiao', 'zhi', 'cui', 'mei', 'xie', 'cui', 'xie', 'mai', 'mai', 'ji', 'xie', 'nin', 'kuai', 'sa', 'zang',
   0x10 => 'qi', 'nao', 'mi', 'nong', 'luan', 'wan', 'bo', 'wen', 'wan', 'xiu', 'jiao', 'jing', 'you', 'heng', 'cuo', 'lie',
   0x20 => 'shan', 'ting', 'mei', 'chun', 'shen', 'qian', 'de', 'juan', 'cu', 'xiu', 'xin', 'tuo', 'pao', 'cheng', 'nei', 'pu',
@@ -22,4 +22,4 @@
   0xD0 => 'xun', 'nao', 'wo', 'zang', 'xian', 'biao', 'xing', 'kuan', 'la', 'yan', 'lu', 'huo', 'za', 'luo', 'qu', 'zang',
   0xE0 => 'luan', 'ni', 'za', 'chen', 'qian', 'wo', 'guang', 'zang', 'lin', 'guang', 'zi', 'jiao', 'nie', 'chou', 'ji', 'gao',
   0xF0 => 'chou', 'mian', 'nie', 'zhi', 'zhi', 'ge', 'jian', 'die', 'zhi', 'xiu', 'tai', 'zhen', 'jiu', 'xian', 'yu', 'cha',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x82.php b/core/lib/Drupal/Component/Transliteration/data/x82.php
index 101305755cb6e138351dfe3a7ce97fd4d4bb5dea..415fdb5752d1f85361af077d0f55ebe0dbe720c3 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x82.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x82.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yao', 'yu', 'chong', 'xi', 'xi', 'jiu', 'yu', 'yu', 'xing', 'ju', 'jiu', 'xin', 'she', 'she', 'she', 'jiu',
   0x10 => 'shi', 'tan', 'shu', 'shi', 'tian', 'tan', 'pu', 'pu', 'guan', 'hua', 'tian', 'chuan', 'shun', 'xia', 'wu', 'zhou',
   0x20 => 'dao', 'chuan', 'shan', 'yi', 'fan', 'pa', 'tai', 'fan', 'ban', 'chuan', 'hang', 'fang', 'ban', 'bi', 'lu', 'zhong',
@@ -22,4 +22,4 @@
   0xD0 => 'ti', 'yuan', 'ran', 'ling', 'tai', 'shao', 'di', 'miao', 'qing', 'li', 'yong', 'ke', 'mu', 'bei', 'bao', 'gou',
   0xE0 => 'min', 'yi', 'yi', 'ju', 'pie', 'ruo', 'ku', 'ning', 'ni', 'bo', 'bing', 'shan', 'xiu', 'yao', 'xian', 'ben',
   0xF0 => 'hong', 'ying', 'zha', 'dong', 'ju', 'die', 'nie', 'gan', 'hu', 'ping', 'mei', 'fu', 'sheng', 'gu', 'bi', 'wei',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x83.php b/core/lib/Drupal/Component/Transliteration/data/x83.php
index 0c2a631772e3ca15c54ba2718ce52bc55cc8420f..73fe3fc662d9aa4fe51761506735749e44ed5622 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x83.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x83.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'fu', 'zhuo', 'mao', 'fan', 'jia', 'mao', 'mao', 'ba', 'ci', 'mo', 'zi', 'di', 'chi', 'ji', 'jing', 'long',
   0x10 => 'cong', 'niao', 'yuan', 'xue', 'ying', 'qiong', 'ge', 'ming', 'li', 'rong', 'yin', 'gen', 'qian', 'chai', 'chen', 'yu',
   0x20 => 'hao', 'zi', 'lie', 'wu', 'ji', 'gui', 'ci', 'jian', 'ci', 'gou', 'guang', 'mang', 'cha', 'jiao', 'jiao', 'fu',
@@ -22,4 +22,4 @@
   0xD0 => 'pu', 'zai', 'gao', 'guo', 'fu', 'lun', 'chang', 'chou', 'song', 'chui', 'zhan', 'men', 'cai', 'ba', 'li', 'tu',
   0xE0 => 'bo', 'han', 'bao', 'qin', 'juan', 'xi', 'qin', 'di', 'jie', 'pu', 'dang', 'jin', 'qiao', 'tai', 'geng', 'hua',
   0xF0 => 'gu', 'ling', 'fei', 'qin', 'an', 'wang', 'beng', 'zhou', 'yan', 'ju', 'jian', 'lin', 'tan', 'shu', 'tian', 'dao',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x84.php b/core/lib/Drupal/Component/Transliteration/data/x84.php
index 68399790454ca86f4e26cffc2db1a831b5b76cb6..4714535b7f8eb8811a1bc60b20425a8c6f2e7a75 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x84.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x84.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'hu', 'qi', 'he', 'cui', 'tao', 'chun', 'bi', 'chang', 'huan', 'fei', 'lai', 'qi', 'meng', 'ping', 'wei', 'dan',
   0x10 => 'sha', 'huan', 'yan', 'yi', 'tiao', 'qi', 'wan', 'ce', 'nai', 'zhen', 'tuo', 'jiu', 'tie', 'luo', 'bi', 'yi',
   0x20 => 'meng', 'bo', 'pao', 'ding', 'ying', 'ying', 'ying', 'xiao', 'sa', 'qiu', 'ke', 'xiang', 'wan', 'yu', 'yu', 'fu',
@@ -22,4 +22,4 @@
   0xD0 => 'ru', 'suo', 'xuan', 'bei', 'yao', 'gui', 'bi', 'zong', 'gun', 'zuo', 'tiao', 'ce', 'pei', 'lan', 'dan', 'ji',
   0xE0 => 'li', 'shen', 'lang', 'yu', 'ling', 'ying', 'mo', 'diao', 'tiao', 'mao', 'tong', 'chu', 'peng', 'an', 'lian', 'cong',
   0xF0 => 'xi', 'ping', 'qiu', 'jin', 'chun', 'jie', 'wei', 'tui', 'cao', 'yu', 'yi', 'zi', 'liao', 'bi', 'lu', 'xu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x85.php b/core/lib/Drupal/Component/Transliteration/data/x85.php
index 7fb87f17ecd0d406da66f2a1d0c5510753733849..a5e4cd512adb785ea20984c71746dc9863017c32 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x85.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x85.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'bu', 'zhang', 'lei', 'qiang', 'man', 'yan', 'ling', 'ji', 'biao', 'gun', 'han', 'di', 'su', 'lu', 'she', 'shang',
   0x10 => 'di', 'mie', 'xun', 'man', 'bo', 'di', 'cuo', 'zhe', 'shen', 'xuan', 'wei', 'hu', 'ao', 'mi', 'lou', 'cu',
   0x20 => 'zhong', 'cai', 'po', 'jiang', 'mi', 'cong', 'niao', 'hui', 'juan', 'yin', 'jian', 'nian', 'shu', 'yin', 'guo', 'chen',
@@ -22,4 +22,4 @@
   0xD0 => 'miao', 'qiong', 'qie', 'xian', 'liao', 'ou', 'xian', 'su', 'lu', 'yi', 'xu', 'xie', 'li', 'yi', 'la', 'lei',
   0xE0 => 'jiao', 'di', 'zhi', 'bei', 'teng', 'yao', 'mo', 'huan', 'biao', 'fan', 'sou', 'tan', 'tui', 'qiong', 'qiao', 'wei',
   0xF0 => 'liu', 'hui', 'ou', 'gao', 'yun', 'bao', 'li', 'shu', 'chu', 'ai', 'lin', 'zao', 'xuan', 'qin', 'lai', 'huo',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x86.php b/core/lib/Drupal/Component/Transliteration/data/x86.php
index 8615a1d20ac1a292cab430728595fa4d736ee8f3..285c2d12cc161a5e45328cfd44168d055e1fb25b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x86.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x86.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'tuo', 'wu', 'rui', 'rui', 'qi', 'heng', 'lu', 'su', 'tui', 'meng', 'yun', 'ping', 'yu', 'xun', 'ji', 'jiong',
   0x10 => 'xuan', 'mo', 'qiu', 'su', 'jiong', 'feng', 'nie', 'bo', 'rang', 'yi', 'xian', 'yu', 'ju', 'lian', 'lian', 'yin',
   0x20 => 'qiang', 'ying', 'long', 'tou', 'wei', 'yue', 'ling', 'qu', 'yao', 'fan', 'mei', 'han', 'kui', 'lan', 'ji', 'dang',
@@ -22,4 +22,4 @@
   0xD0 => 'qu', 'mou', 'ge', 'ci', 'hui', 'hui', 'mang', 'fu', 'yang', 'wa', 'lie', 'zhu', 'yi', 'xian', 'kuo', 'jiao',
   0xE0 => 'li', 'yi', 'ping', 'qi', 'ha', 'she', 'yi', 'wang', 'mo', 'qiong', 'qie', 'gui', 'qiong', 'zhi', 'man', 'lao',
   0xF0 => 'zhe', 'jia', 'nao', 'si', 'qi', 'xing', 'jie', 'qiu', 'shao', 'yong', 'jia', 'tui', 'che', 'bai', 'e', 'han',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x87.php b/core/lib/Drupal/Component/Transliteration/data/x87.php
index be4f22705126774b0193c359dff8572c71687b68..c9a1208674d1ca0414c6c6b2cfdfaf0f4d8558d4 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x87.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x87.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'shu', 'xuan', 'feng', 'shen', 'shen', 'fu', 'xian', 'zhe', 'wu', 'fu', 'li', 'lang', 'bi', 'chu', 'yuan', 'you',
   0x10 => 'jie', 'dan', 'yan', 'ting', 'dian', 'tui', 'hui', 'wo', 'zhi', 'song', 'fei', 'ju', 'mi', 'qi', 'qi', 'yu',
   0x20 => 'jun', 'la', 'meng', 'qiang', 'si', 'xi', 'lun', 'li', 'die', 'tiao', 'tao', 'kun', 'han', 'han', 'yu', 'bang',
@@ -22,4 +22,4 @@
   0xD0 => 'chang', 'zhang', 'mang', 'xiang', 'mo', 'zui', 'si', 'qiu', 'te', 'zhi', 'peng', 'peng', 'jiao', 'qu', 'bie', 'liao',
   0xE0 => 'pan', 'gui', 'xi', 'ji', 'zhuan', 'huang', 'fei', 'lao', 'jue', 'jue', 'hui', 'yin', 'chan', 'jiao', 'shan', 'nao',
   0xF0 => 'xiao', 'wu', 'chong', 'xun', 'si', 'chu', 'cheng', 'dang', 'li', 'xie', 'shan', 'yi', 'jing', 'da', 'chan', 'qi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x88.php b/core/lib/Drupal/Component/Transliteration/data/x88.php
index 88430602638837fdcf029080601cd51b815afcd3..45feb58f55d0fcba2b1742f31539f9d140237bd8 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x88.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x88.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ci', 'xiang', 'she', 'luo', 'qin', 'ying', 'chai', 'li', 'zei', 'xuan', 'lian', 'zhu', 'ze', 'xie', 'mang', 'xie',
   0x10 => 'qi', 'rong', 'jian', 'meng', 'hao', 'ru', 'huo', 'zhuo', 'jie', 'pin', 'he', 'mie', 'fan', 'lei', 'jie', 'la',
   0x20 => 'min', 'li', 'chun', 'li', 'qiu', 'nie', 'lu', 'du', 'xiao', 'zhu', 'long', 'li', 'long', 'feng', 'ye', 'beng',
@@ -22,4 +22,4 @@
   0xD0 => 'juan', 'shen', 'pou', 'ge', 'yi', 'yu', 'zhen', 'liu', 'qiu', 'qun', 'ji', 'yi', 'bu', 'zhuang', 'shui', 'sha',
   0xE0 => 'qun', 'li', 'lian', 'lian', 'ku', 'jian', 'fou', 'chan', 'bi', 'kun', 'tao', 'yuan', 'ling', 'chi', 'chang', 'chou',
   0xF0 => 'duo', 'biao', 'liang', 'shang', 'pei', 'pei', 'fei', 'yuan', 'luo', 'guo', 'yan', 'du', 'ti', 'zhi', 'ju', 'yi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x89.php b/core/lib/Drupal/Component/Transliteration/data/x89.php
index 05049636258178ae0577d7ad1034c7565b1b27df..fbef66d8ce89d2d18e331b61ef70f633d82c0304 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x89.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x89.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ji', 'zhi', 'gua', 'ken', 'qi', 'ti', 'ti', 'fu', 'chong', 'xie', 'bian', 'die', 'kun', 'duan', 'xiu', 'xiu',
   0x10 => 'he', 'yuan', 'bao', 'bao', 'fu', 'yu', 'tuan', 'yan', 'hui', 'bei', 'chu', 'lu', 'pao', 'dan', 'yun', 'ta',
   0x20 => 'gou', 'da', 'huai', 'rong', 'yuan', 'ru', 'nai', 'jiong', 'suo', 'ban', 'tui', 'chi', 'sang', 'niao', 'ying', 'jie',
@@ -22,4 +22,4 @@
   0xD0 => 'jin', 'qu', 'jiao', 'qiu', 'jin', 'cu', 'jue', 'zhi', 'chao', 'ji', 'gu', 'dan', 'zi', 'di', 'shang', 'hua',
   0xE0 => 'quan', 'ge', 'shi', 'jie', 'gui', 'gong', 'chu', 'jie', 'hun', 'qiu', 'xing', 'su', 'ni', 'ji', 'lu', 'zhi',
   0xF0 => 'zha', 'bi', 'xing', 'hu', 'shang', 'gong', 'zhi', 'xue', 'chu', 'xi', 'yi', 'li', 'jue', 'xi', 'yan', 'xi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x8a.php b/core/lib/Drupal/Component/Transliteration/data/x8a.php
index 111894c12003330c2ef544827e7d1359bbc395d0..03abb6687a5e7307b239d3804b073f7ec5f48443 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x8a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x8a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yan', 'yan', 'ding', 'fu', 'qiu', 'qiu', 'jiao', 'hong', 'ji', 'fan', 'xun', 'diao', 'hong', 'chai', 'tao', 'xu',
   0x10 => 'jie', 'yi', 'ren', 'xun', 'yin', 'shan', 'qi', 'tuo', 'ji', 'xun', 'yin', 'e', 'fen', 'ya', 'yao', 'song',
   0x20 => 'shen', 'yin', 'xin', 'jue', 'xiao', 'ne', 'chen', 'you', 'zhi', 'xiong', 'fang', 'xin', 'chao', 'she', 'xian', 'sa',
@@ -22,4 +22,4 @@
   0xD0 => 'qian', 'zhuo', 'liang', 'jian', 'chu', 'hao', 'lun', 'shen', 'biao', 'huai', 'pian', 'yu', 'die', 'xu', 'pian', 'shi',
   0xE0 => 'xuan', 'shi', 'hun', 'hua', 'e', 'zhong', 'di', 'xie', 'fu', 'pu', 'ting', 'jian', 'qi', 'yu', 'zi', 'zhuan',
   0xF0 => 'xi', 'hui', 'yin', 'an', 'xian', 'nan', 'chen', 'feng', 'zhu', 'yang', 'yan', 'huang', 'xuan', 'ge', 'nuo', 'qi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x8b.php b/core/lib/Drupal/Component/Transliteration/data/x8b.php
index 0a535f724e50a4c84c3b5b1cde92d060da6d0b81..2cdc115ef515d84b150398e3cac69d46016901b5 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x8b.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x8b.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'mou', 'ye', 'wei', 'xing', 'teng', 'zhou', 'shan', 'jian', 'po', 'kui', 'huang', 'huo', 'ge', 'ying', 'mi', 'xiao',
   0x10 => 'mi', 'xi', 'qiang', 'chen', 'xue', 'ti', 'su', 'bang', 'chi', 'qian', 'shi', 'jiang', 'yuan', 'xie', 'he', 'tao',
   0x20 => 'yao', 'yao', 'zhi', 'yu', 'biao', 'cong', 'qing', 'li', 'mo', 'mo', 'shang', 'zhe', 'miu', 'jian', 'ze', 'jie',
@@ -22,4 +22,4 @@
   0xD0 => 'bi', 'yi', 'yi', 'kuang', 'lei', 'shi', 'gua', 'shi', 'ji', 'hui', 'cheng', 'zhu', 'shen', 'hua', 'dan', 'gou',
   0xE0 => 'quan', 'gui', 'xun', 'yi', 'zheng', 'gai', 'xiang', 'cha', 'hun', 'xu', 'zhou', 'jie', 'wu', 'yu', 'qiao', 'wu',
   0xF0 => 'gao', 'you', 'hui', 'kuang', 'shuo', 'song', 'ei', 'qing', 'zhu', 'zou', 'nuo', 'du', 'zhuo', 'fei', 'ke', 'wei',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x8c.php b/core/lib/Drupal/Component/Transliteration/data/x8c.php
index 5e805ad21af4d7241c63df6f951fa7197e431142..8b3d3baaee946c8102c7ec053590e2d1c94c5bb8 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x8c.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x8c.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yu', 'shui', 'shen', 'diao', 'chan', 'liang', 'zhun', 'sui', 'tan', 'shen', 'yi', 'mou', 'chen', 'die', 'huang', 'jian',
   0x10 => 'xie', 'xue', 'ye', 'wei', 'e', 'yu', 'xuan', 'chan', 'zi', 'an', 'yan', 'di', 'mi', 'pian', 'xu', 'mo',
   0x20 => 'dang', 'su', 'xie', 'yao', 'bang', 'shi', 'qian', 'mi', 'jin', 'man', 'zhe', 'jian', 'miu', 'tan', 'zen', 'qiao',
@@ -22,4 +22,4 @@
   0xD0 => 'xun', 'zhen', 'she', 'bin', 'bin', 'qiu', 'she', 'chuan', 'zang', 'zhou', 'lai', 'zan', 'ci', 'chen', 'shang', 'tian',
   0xE0 => 'pei', 'geng', 'xian', 'mai', 'jian', 'sui', 'fu', 'tan', 'cong', 'cong', 'zhi', 'ji', 'zhang', 'du', 'jin', 'xiong',
   0xF0 => 'chun', 'yun', 'bao', 'zai', 'lai', 'feng', 'cang', 'ji', 'sheng', 'yi', 'zhuan', 'fu', 'gou', 'sai', 'ze', 'liao',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x8d.php b/core/lib/Drupal/Component/Transliteration/data/x8d.php
index c4b8695158efcf894be284add484ba34b9713612..07fc8d7fa380a67e8381c9db82d2b388f102f70e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x8d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x8d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yi', 'bai', 'chen', 'wan', 'zhi', 'zhui', 'biao', 'yun', 'zeng', 'dan', 'zan', 'yan', 'pu', 'shan', 'wan', 'ying',
   0x10 => 'jin', 'gan', 'xian', 'zang', 'bi', 'du', 'shu', 'yan', 'shang', 'xuan', 'long', 'gan', 'zang', 'bei', 'zhen', 'fu',
   0x20 => 'yuan', 'gong', 'cai', 'ze', 'xian', 'bai', 'zhang', 'huo', 'zhi', 'fan', 'tan', 'pin', 'bian', 'gou', 'zhu', 'guan',
@@ -22,4 +22,4 @@
   0xD0 => 'ci', 'pao', 'qia', 'zhu', 'ju', 'dian', 'zhi', 'fu', 'pan', 'ju', 'shan', 'bo', 'ni', 'ju', 'li', 'gen',
   0xE0 => 'yi', 'ji', 'duo', 'xian', 'jiao', 'duo', 'zhu', 'quan', 'kua', 'zhuai', 'gui', 'qiong', 'kui', 'xiang', 'chi', 'lu',
   0xF0 => 'pian', 'zhi', 'jia', 'tiao', 'cai', 'jian', 'ta', 'qiao', 'bi', 'xian', 'duo', 'ji', 'ju', 'ji', 'shu', 'tu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x8e.php b/core/lib/Drupal/Component/Transliteration/data/x8e.php
index 80ef740c93afd2f19b4f70edd1dda7477ca9c273..c48ec1da8c123004e565cbfe937ef0828a4d1856 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x8e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x8e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'chu', 'jing', 'nie', 'xiao', 'bu', 'xue', 'cun', 'mu', 'shu', 'liang', 'yong', 'jiao', 'chou', 'qiao', 'mou', 'ta',
   0x10 => 'jian', 'qi', 'wo', 'wei', 'chuo', 'jie', 'ji', 'nie', 'ju', 'ju', 'lun', 'lu', 'leng', 'huai', 'ju', 'chi',
   0x20 => 'wan', 'quan', 'ti', 'bo', 'zu', 'qie', 'yi', 'cu', 'zong', 'cai', 'zong', 'peng', 'zhi', 'zheng', 'dian', 'zhi',
@@ -22,4 +22,4 @@
   0xD0 => 'xin', 'dai', 'xuan', 'fan', 'ren', 'shan', 'kuang', 'shu', 'tun', 'chen', 'dai', 'e', 'na', 'qi', 'mao', 'ruan',
   0xE0 => 'ren', 'qian', 'zhuan', 'hong', 'hu', 'qu', 'kuang', 'di', 'ling', 'dai', 'ao', 'zhen', 'fan', 'kuang', 'yang', 'peng',
   0xF0 => 'bei', 'gu', 'gu', 'pao', 'zhu', 'rong', 'e', 'ba', 'zhou', 'zhi', 'yao', 'ke', 'yi', 'zhi', 'shi', 'ping',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x8f.php b/core/lib/Drupal/Component/Transliteration/data/x8f.php
index a4cd21b3a10d00ca23c2b13df83ece62d83559f2..e7185a9c0027de788a928f1f0e95eb4296ab074c 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x8f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x8f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'er', 'gong', 'ju', 'jiao', 'guang', 'he', 'kai', 'quan', 'zhou', 'zai', 'zhi', 'she', 'liang', 'yu', 'shao', 'you',
   0x10 => 'wan', 'yin', 'zhe', 'wan', 'fu', 'qing', 'zhou', 'ni', 'leng', 'zhe', 'zhan', 'liang', 'zi', 'hui', 'wang', 'chuo',
   0x20 => 'guo', 'kan', 'yi', 'peng', 'qian', 'gun', 'nian', 'ping', 'guan', 'bei', 'lun', 'pai', 'liang', 'ruan', 'rou', 'ji',
@@ -22,4 +22,4 @@
   0xD0 => 'yun', 'jin', 'hang', 'ya', 'fan', 'wu', 'da', 'e', 'hai', 'zhe', 'zhong', 'jin', 'yuan', 'wei', 'lian', 'chi',
   0xE0 => 'che', 'ni', 'tiao', 'zhi', 'yi', 'jiong', 'jia', 'chen', 'dai', 'er', 'di', 'po', 'zhu', 'die', 'ze', 'tao',
   0xF0 => 'shu', 'tuo', 'qu', 'jing', 'hui', 'dong', 'you', 'mi', 'beng', 'ji', 'nai', 'yi', 'jie', 'zhui', 'lie', 'xun',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x90.php b/core/lib/Drupal/Component/Transliteration/data/x90.php
index e2a817ba73d7c3e24207093858fdbff9386b9f31..97821c4521991114ce6b898708b5ff6b6df58215 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x90.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x90.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'tui', 'song', 'shi', 'tao', 'pang', 'hou', 'ni', 'dun', 'jiong', 'xuan', 'xun', 'bu', 'you', 'xiao', 'qiu', 'tou',
   0x10 => 'zhu', 'qiu', 'di', 'di', 'tu', 'jing', 'ti', 'dou', 'yi', 'zhe', 'tong', 'guang', 'wu', 'shi', 'cheng', 'su',
   0x20 => 'zao', 'qun', 'feng', 'lian', 'suo', 'hui', 'li', 'gu', 'lai', 'ben', 'cuo', 'jue', 'beng', 'huan', 'dai', 'lu',
@@ -22,4 +22,4 @@
   0xD0 => 'kuai', 'zheng', 'lang', 'yun', 'yan', 'cheng', 'dou', 'xi', 'lu', 'fu', 'wu', 'fu', 'gao', 'hao', 'lang', 'jia',
   0xE0 => 'geng', 'jun', 'ying', 'bo', 'xi', 'bei', 'li', 'yun', 'bu', 'xiao', 'qi', 'pi', 'qing', 'guo', 'zhou', 'tan',
   0xF0 => 'zou', 'ping', 'lai', 'ni', 'chen', 'you', 'bu', 'xiang', 'dan', 'ju', 'yong', 'qiao', 'yi', 'dou', 'yan', 'mei',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x91.php b/core/lib/Drupal/Component/Transliteration/data/x91.php
index 2de4466a464ac8a9c3eb5ddc2170762450705b4a..4f10582664bbdfee021aff911b0f72e8f74b10e3 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x91.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x91.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ruo', 'bei', 'e', 'shu', 'juan', 'yu', 'yun', 'hou', 'kui', 'xiang', 'xiang', 'sou', 'tang', 'ming', 'xi', 'ru',
   0x10 => 'chu', 'zi', 'zou', 'ye', 'wu', 'xiang', 'yun', 'hao', 'yong', 'bi', 'mao', 'chao', 'fu', 'liao', 'yin', 'zhuan',
   0x20 => 'hu', 'qiao', 'yan', 'zhang', 'man', 'qiao', 'xu', 'deng', 'bi', 'xun', 'bi', 'zeng', 'wei', 'zheng', 'mao', 'shan',
@@ -22,4 +22,4 @@
   0xD0 => 'li', 'jin', 'jin', 'qiu', 'yi', 'liao', 'dao', 'zhao', 'ding', 'po', 'qiu', 'ba', 'fu', 'zhen', 'zhi', 'ba',
   0xE0 => 'luan', 'fu', 'nai', 'diao', 'shan', 'qiao', 'kou', 'chuan', 'zi', 'fan', 'hua', 'hua', 'han', 'gang', 'qi', 'mang',
   0xF0 => 'ri', 'di', 'si', 'xi', 'yi', 'chai', 'shi', 'tu', 'xi', 'nu', 'qian', 'qiu', 'jian', 'pi', 'ye', 'jin',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x92.php b/core/lib/Drupal/Component/Transliteration/data/x92.php
index 037b461c6124a52ec4a701cadfdb5ac1104e654e..2602bf68f7ee9c340f6b7e0a19c0f26ed3193a35 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x92.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x92.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ba', 'fang', 'chen', 'xing', 'dou', 'yue', 'qian', 'fu', 'pi', 'na', 'xin', 'e', 'jue', 'dun', 'gou', 'yin',
   0x10 => 'qian', 'ban', 'sa', 'ren', 'chao', 'niu', 'fen', 'yun', 'ji', 'qin', 'pi', 'guo', 'hong', 'yin', 'jun', 'shi',
   0x20 => 'yi', 'zhong', 'xi', 'gai', 'ri', 'huo', 'tai', 'kang', 'yuan', 'lu', 'e', 'wen', 'duo', 'zi', 'ni', 'tu',
@@ -22,4 +22,4 @@
   0xD0 => 'hong', 'cuan', 'feng', 'chan', 'wan', 'zhi', 'si', 'xuan', 'hua', 'yu', 'tiao', 'gong', 'zhuo', 'lue', 'xing', 'qin',
   0xE0 => 'shen', 'han', 'lue', 'ye', 'chu', 'zeng', 'ju', 'xian', 'tie', 'mang', 'pu', 'li', 'pan', 'rui', 'cheng', 'gao',
   0xF0 => 'li', 'te', 'bing', 'zhu', 'zhen', 'tu', 'liu', 'zui', 'ju', 'chang', 'yuan', 'jian', 'gang', 'diao', 'tao', 'chang',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x93.php b/core/lib/Drupal/Component/Transliteration/data/x93.php
index 34928a9d1a72b41c469e1aefafcd17a9b9dd690e..cecc3174fa396a5a679f71b2bb03e941baacb554 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x93.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x93.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'lun', 'guo', 'ling', 'bei', 'lu', 'li', 'qiang', 'pou', 'juan', 'min', 'zui', 'peng', 'an', 'pi', 'xian', 'ya',
   0x10 => 'zhui', 'lei', 'ke', 'kong', 'ta', 'kun', 'du', 'nei', 'chui', 'zi', 'zheng', 'ben', 'nie', 'zong', 'chun', 'tan',
   0x20 => 'ding', 'qi', 'qian', 'zhui', 'ji', 'yu', 'jin', 'guan', 'mao', 'chang', 'tian', 'xi', 'lian', 'tao', 'gu', 'cuo',
@@ -22,4 +22,4 @@
   0xD0 => 'liu', 'di', 'san', 'zong', 'yi', 'lu', 'ao', 'keng', 'qiang', 'cui', 'qi', 'chang', 'tang', 'man', 'yong', 'chan',
   0xE0 => 'feng', 'jing', 'biao', 'shu', 'lou', 'xiu', 'cong', 'long', 'zan', 'jian', 'cao', 'li', 'xia', 'xi', 'kang', 'shuang',
   0xF0 => 'beng', 'zhang', 'qian', 'cheng', 'lu', 'hua', 'ji', 'pu', 'hui', 'qiang', 'po', 'lin', 'se', 'xiu', 'san', 'cheng',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x94.php b/core/lib/Drupal/Component/Transliteration/data/x94.php
index 9763fbcc75d332fcb89145156e9090347cdb9cef..1bb228ac73dfa9f0cf8106ab7cd5cac735130d41 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x94.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x94.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'kui', 'si', 'liu', 'nao', 'huang', 'pie', 'sui', 'fan', 'qiao', 'quan', 'yang', 'tang', 'xiang', 'jue', 'jiao', 'zun',
   0x10 => 'liao', 'qie', 'lao', 'dui', 'xin', 'zan', 'ji', 'jian', 'zhong', 'deng', 'ya', 'ying', 'dui', 'jue', 'nou', 'zan',
   0x20 => 'pu', 'tie', 'fan', 'zhang', 'ding', 'shan', 'kai', 'jian', 'fei', 'sui', 'lu', 'juan', 'hui', 'yu', 'lian', 'zhuo',
@@ -22,4 +22,4 @@
   0xD0 => 'kao', 'lao', 'er', 'mang', 'ya', 'you', 'cheng', 'jia', 'ye', 'nao', 'zhi', 'dang', 'tong', 'lu', 'diao', 'yin',
   0xE0 => 'kai', 'zha', 'zhu', 'xi', 'ding', 'diu', 'xian', 'hua', 'quan', 'sha', 'ha', 'diao', 'ge', 'ming', 'zheng', 'se',
   0xF0 => 'jiao', 'yi', 'chan', 'chong', 'tang', 'an', 'yin', 'ru', 'zhu', 'lao', 'pu', 'wu', 'lai', 'te', 'lian', 'keng',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x95.php b/core/lib/Drupal/Component/Transliteration/data/x95.php
index 84f2f89af809511e91e49048e47568cd882558ff..fc95f3641fb3eb8cbfaa1f032b9330e6af3ffeb5 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x95.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x95.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'xiao', 'suo', 'li', 'zeng', 'chu', 'guo', 'gao', 'e', 'xiu', 'cuo', 'lue', 'feng', 'xin', 'liu', 'kai', 'jian',
   0x10 => 'rui', 'ti', 'lang', 'qin', 'ju', 'a', 'qiang', 'zhe', 'nuo', 'cuo', 'mao', 'ben', 'qi', 'de', 'ke', 'kun',
   0x20 => 'chang', 'xi', 'gu', 'luo', 'chui', 'zhui', 'jin', 'zhi', 'xian', 'juan', 'huo', 'pei', 'tan', 'ding', 'jian', 'ju',
@@ -22,4 +22,4 @@
   0xD0 => 'tian', 'nie', 'ta', 'kai', 'he', 'que', 'chuang', 'guan', 'dou', 'qi', 'kui', 'tang', 'guan', 'piao', 'kan', 'xi',
   0xE0 => 'hui', 'chan', 'pi', 'dang', 'huan', 'ta', 'wen', 'ta', 'men', 'shuan', 'shan', 'yan', 'han', 'bi', 'wen', 'chuang',
   0xF0 => 'run', 'wei', 'xian', 'hong', 'jian', 'min', 'kang', 'men', 'zha', 'nao', 'gui', 'wen', 'ta', 'min', 'lu', 'kai',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x96.php b/core/lib/Drupal/Component/Transliteration/data/x96.php
index f665409c7bed8b517125a09fee1a6fe75271262e..7f62e478868da7c46d01ffa869e0f8999ee91c8d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x96.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x96.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'fa', 'ge', 'he', 'kun', 'jiu', 'yue', 'lang', 'du', 'yu', 'yan', 'chang', 'xi', 'wen', 'hun', 'yan', 'e',
   0x10 => 'chan', 'lan', 'qu', 'hui', 'kuo', 'que', 'he', 'tian', 'da', 'que', 'han', 'huan', 'fu', 'fu', 'le', 'dui',
   0x20 => 'xin', 'qian', 'wu', 'gai', 'zhi', 'yin', 'yang', 'dou', 'e', 'sheng', 'ban', 'pei', 'keng', 'yun', 'ruan', 'zhi',
@@ -22,4 +22,4 @@
   0xD0 => 'hu', 'za', 'luo', 'yu', 'chou', 'diao', 'sui', 'han', 'wo', 'shuang', 'guan', 'chu', 'za', 'yong', 'ji', 'xi',
   0xE0 => 'chou', 'liu', 'li', 'nan', 'xue', 'za', 'ji', 'ji', 'yu', 'yu', 'xue', 'na', 'fou', 'se', 'mu', 'wen',
   0xF0 => 'fen', 'pang', 'yun', 'li', 'chi', 'yang', 'ling', 'lei', 'an', 'bao', 'wu', 'dian', 'dang', 'hu', 'wu', 'diao',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x97.php b/core/lib/Drupal/Component/Transliteration/data/x97.php
index 1187fbb78e1fe453a3337815777e04884bfeb71c..f9296c7bea8aa9e36b5022381cb8e13eb93ecd68 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x97.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x97.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'xu', 'ji', 'mu', 'chen', 'xiao', 'zha', 'ting', 'zhen', 'pei', 'mei', 'ling', 'qi', 'zhou', 'huo', 'sha', 'fei',
   0x10 => 'hong', 'zhan', 'yin', 'ni', 'zhu', 'tun', 'lin', 'ling', 'dong', 'ying', 'wu', 'ling', 'shuang', 'ling', 'xia', 'hong',
   0x20 => 'yin', 'mai', 'mai', 'yun', 'liu', 'meng', 'bin', 'wu', 'wei', 'kuo', 'yin', 'xi', 'yi', 'ai', 'dan', 'teng',
@@ -22,4 +22,4 @@
   0xD0 => 'ge', 'wei', 'qiao', 'han', 'chang', 'kuo', 'rou', 'yun', 'she', 'wei', 'ge', 'bai', 'tao', 'gou', 'yun', 'gao',
   0xE0 => 'bi', 'wei', 'sui', 'du', 'wa', 'du', 'wei', 'ren', 'fu', 'han', 'wei', 'yun', 'tao', 'jiu', 'jiu', 'xian',
   0xF0 => 'xie', 'xian', 'ji', 'yin', 'za', 'yun', 'shao', 'le', 'peng', 'huang', 'ying', 'yun', 'peng', 'an', 'yin', 'xiang',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x98.php b/core/lib/Drupal/Component/Transliteration/data/x98.php
index 8e1ff9251e5650f9baf43beca8043ff7c62dbc40..cb1ec6aa328ce7a269f191ddb1b1b8fc575b6a10 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x98.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x98.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'hu', 'ye', 'ding', 'qing', 'kui', 'xiang', 'shun', 'han', 'xu', 'yi', 'xu', 'e', 'song', 'kui', 'qi', 'hang',
   0x10 => 'yu', 'wan', 'ban', 'dun', 'di', 'dan', 'pan', 'po', 'ling', 'che', 'jing', 'lei', 'he', 'qiao', 'e', 'e',
   0x20 => 'wei', 'xie', 'kuo', 'shen', 'yi', 'shen', 'hai', 'dui', 'yu', 'ping', 'lei', 'fu', 'jia', 'tou', 'hui', 'kui',
@@ -22,4 +22,4 @@
   0xD0 => 'zhan', 'biao', 'sa', 'ju', 'si', 'sou', 'yao', 'liu', 'piao', 'biao', 'biao', 'fei', 'fan', 'fei', 'fei', 'shi',
   0xE0 => 'shi', 'can', 'ji', 'ding', 'si', 'tuo', 'zhan', 'sun', 'xiang', 'tun', 'ren', 'yu', 'juan', 'chi', 'yin', 'fan',
   0xF0 => 'fan', 'sun', 'yin', 'tou', 'yi', 'zuo', 'bi', 'jie', 'tao', 'liu', 'ci', 'tie', 'si', 'bao', 'shi', 'duo',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x99.php b/core/lib/Drupal/Component/Transliteration/data/x99.php
index 7e99ac0c0aa78999fd04891634ec406503dc286c..6f6fb47f815816ee123e39385fb02f7e0490982d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x99.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x99.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'hai', 'ren', 'tian', 'jiao', 'jia', 'bing', 'yao', 'tong', 'ci', 'xiang', 'yang', 'juan', 'er', 'yan', 'le', 'xi',
   0x10 => 'can', 'bo', 'nei', 'e', 'bu', 'jun', 'dou', 'su', 'yu', 'shi', 'yao', 'hun', 'guo', 'shi', 'jian', 'zhui',
   0x20 => 'bing', 'xian', 'bu', 'ye', 'tan', 'fei', 'zhang', 'wei', 'guan', 'e', 'nuan', 'yun', 'hu', 'huang', 'tie', 'hui',
@@ -22,4 +22,4 @@
   0xD0 => 'zhu', 'nu', 'ju', 'pi', 'zang', 'jia', 'ling', 'zhen', 'tai', 'fu', 'yang', 'shi', 'bi', 'tuo', 'tuo', 'si',
   0xE0 => 'liu', 'ma', 'pian', 'tao', 'zhi', 'rong', 'teng', 'dong', 'xun', 'quan', 'shen', 'jiong', 'er', 'hai', 'bo', 'zhu',
   0xF0 => 'yin', 'luo', 'zhou', 'dan', 'xie', 'liu', 'ju', 'song', 'qin', 'mang', 'lang', 'han', 'tu', 'xuan', 'tui', 'jun',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x9a.php b/core/lib/Drupal/Component/Transliteration/data/x9a.php
index 3c855404358c0b5a2e592b9dd4dee0d4aef9ee3c..cd576596c7d4db503a9de5c9e4c75bfc0472c583 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x9a.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x9a.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'e', 'cheng', 'xing', 'ai', 'lu', 'zhui', 'zhou', 'she', 'pian', 'kun', 'tao', 'lai', 'zong', 'ke', 'qi', 'qi',
   0x10 => 'yan', 'fei', 'sao', 'yan', 'ge', 'yao', 'wu', 'pian', 'cong', 'pian', 'qian', 'fei', 'huang', 'qian', 'huo', 'yu',
   0x20 => 'ti', 'quan', 'xia', 'zong', 'kui', 'rou', 'si', 'gua', 'tuo', 'gui', 'sou', 'qian', 'cheng', 'zhi', 'liu', 'peng',
@@ -22,4 +22,4 @@
   0xD0 => 'xiao', 'du', 'zang', 'sui', 'ti', 'bin', 'kuan', 'lu', 'gao', 'gao', 'qiao', 'kao', 'qiao', 'lao', 'sao', 'biao',
   0xE0 => 'kun', 'kun', 'di', 'fang', 'xiu', 'ran', 'mao', 'dan', 'kun', 'bin', 'fa', 'tiao', 'pi', 'zi', 'fa', 'ran',
   0xF0 => 'ti', 'bao', 'bi', 'mao', 'fu', 'er', 'rong', 'qu', 'gong', 'xiu', 'kuo', 'ji', 'peng', 'zhua', 'shao', 'suo',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x9b.php b/core/lib/Drupal/Component/Transliteration/data/x9b.php
index 9617f974573ae0554406bfbf24a3f312ca19320a..2cbbd7eaf4adaae4cb182c6030c2f4f023c8dfde 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x9b.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x9b.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ti', 'li', 'bin', 'zong', 'di', 'peng', 'song', 'zheng', 'quan', 'zong', 'shun', 'jian', 'tuo', 'hu', 'la', 'jiu',
   0x10 => 'qi', 'lian', 'zhen', 'bin', 'peng', 'ma', 'san', 'man', 'man', 'seng', 'xu', 'lie', 'qian', 'qian', 'nang', 'huan',
   0x20 => 'kuo', 'ning', 'bin', 'lie', 'rang', 'dou', 'dou', 'nao', 'hong', 'xi', 'dou', 'han', 'dou', 'dou', 'jiu', 'chang',
@@ -22,4 +22,4 @@
   0xD0 => 'zou', 'xi', 'yong', 'ni', 'zi', 'qi', 'zheng', 'xiang', 'nei', 'chun', 'ji', 'diao', 'qie', 'gu', 'zhou', 'dong',
   0xE0 => 'lai', 'fei', 'ni', 'yi', 'kun', 'lu', 'jiu', 'chang', 'jing', 'lun', 'ling', 'zou', 'li', 'meng', 'zong', 'zhi',
   0xF0 => 'nian', 'hu', 'yu', 'di', 'shi', 'shen', 'hun', 'ti', 'hou', 'xing', 'zhu', 'la', 'zong', 'zei', 'bian', 'bian',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x9c.php b/core/lib/Drupal/Component/Transliteration/data/x9c.php
index 76be43eb39ea3e11669fbc92534307fde705d6b8..4ca423cb14bbcf8c1aaed746390d7e56a3bd08c9 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x9c.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x9c.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'huan', 'quan', 'zei', 'wei', 'wei', 'yu', 'chun', 'rou', 'die', 'huang', 'lian', 'yan', 'qiu', 'qiu', 'jian', 'bi',
   0x10 => 'e', 'yang', 'fu', 'sai', 'gan', 'xia', 'tuo', 'hu', 'shi', 'ruo', 'xuan', 'wen', 'qian', 'hao', 'wu', 'fang',
   0x20 => 'sao', 'liu', 'ma', 'shi', 'shi', 'guan', 'zi', 'teng', 'ta', 'yao', 'e', 'yong', 'qian', 'qi', 'wen', 'ruo',
@@ -22,4 +22,4 @@
   0xD0 => 'yao', 'pang', 'jian', 'le', 'biao', 'xue', 'bie', 'man', 'min', 'yong', 'wei', 'xi', 'gui', 'shan', 'lin', 'zun',
   0xE0 => 'hu', 'gan', 'li', 'zhan', 'guan', 'niao', 'yi', 'fu', 'li', 'jiu', 'bu', 'yan', 'fu', 'diao', 'ji', 'feng',
   0xF0 => 'ru', 'gan', 'shi', 'feng', 'ming', 'bao', 'yuan', 'zhi', 'hu', 'qin', 'fu', 'ban', 'wen', 'jian', 'shi', 'yu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x9d.php b/core/lib/Drupal/Component/Transliteration/data/x9d.php
index 21e997732798972759dfe6dfe7ffe3855b4e3df7..d3b4d78c9a9cf2291127959e1546417faa81211d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x9d.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x9d.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'fou', 'yao', 'jue', 'jue', 'pi', 'huan', 'zhen', 'bao', 'yan', 'ya', 'zheng', 'fang', 'feng', 'wen', 'ou', 'dai',
   0x10 => 'ge', 'ru', 'ling', 'mie', 'fu', 'tuo', 'min', 'li', 'bian', 'zhi', 'ge', 'yuan', 'ci', 'qu', 'xiao', 'chi',
   0x20 => 'dan', 'ju', 'yao', 'gu', 'dong', 'yu', 'yang', 'rong', 'ya', 'tie', 'yu', 'tian', 'ying', 'dui', 'wu', 'er',
@@ -22,4 +22,4 @@
   0xD0 => 'chen', 'ji', 'tuan', 'zhe', 'ao', 'yao', 'yi', 'ou', 'chi', 'zhi', 'liu', 'yong', 'lu', 'bi', 'shuang', 'zhuo',
   0xE0 => 'yu', 'wu', 'jue', 'yin', 'ti', 'si', 'jiao', 'yi', 'hua', 'bi', 'ying', 'su', 'huang', 'fan', 'jiao', 'liao',
   0xF0 => 'yan', 'gao', 'jiu', 'xian', 'xian', 'tu', 'mai', 'zun', 'yu', 'ying', 'lu', 'tuan', 'xian', 'xue', 'yi', 'pi',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x9e.php b/core/lib/Drupal/Component/Transliteration/data/x9e.php
index b50dd0fe31a46575d1e49543cbae77ccb79f4e72..db7e7f04eb3350817227f3e935ac613e356b95a1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x9e.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x9e.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'chu', 'luo', 'xi', 'yi', 'ji', 'ze', 'yu', 'zhan', 'ye', 'yang', 'pi', 'ning', 'hu', 'mi', 'ying', 'meng',
   0x10 => 'di', 'yue', 'yu', 'lei', 'bao', 'lu', 'he', 'long', 'shuang', 'yue', 'ying', 'guan', 'qu', 'li', 'luan', 'niao',
   0x20 => 'jiu', 'ji', 'yuan', 'ming', 'shi', 'ou', 'ya', 'cang', 'bao', 'zhen', 'gu', 'dong', 'lu', 'ya', 'xiao', 'yang',
@@ -22,4 +22,4 @@
   0xD0 => 'chi', 'hei', 'hei', 'yi', 'qian', 'dan', 'xi', 'tun', 'mo', 'mo', 'qian', 'dai', 'chu', 'you', 'dian', 'yi',
   0xE0 => 'xia', 'yan', 'qu', 'mei', 'yan', 'qing', 'yue', 'li', 'dang', 'du', 'can', 'yan', 'yan', 'yan', 'dan', 'an',
   0xF0 => 'zhen', 'dai', 'can', 'yi', 'mei', 'zhan', 'yan', 'du', 'lu', 'zhi', 'fen', 'fu', 'fu', 'mian', 'mian', 'yuan',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/x9f.php b/core/lib/Drupal/Component/Transliteration/data/x9f.php
index 49f08e5ab17383e25b14d8474fe4f5961569c033..13ecd6e821fef7cf025dd8aee5b5a9e46259163e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/x9f.php
+++ b/core/lib/Drupal/Component/Transliteration/data/x9f.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'cu', 'qu', 'chao', 'wa', 'zhu', 'zhi', 'meng', 'ao', 'bie', 'tuo', 'bi', 'yuan', 'chao', 'tuo', 'ding', 'mi',
   0x10 => 'nai', 'ding', 'zi', 'gu', 'gu', 'dong', 'fen', 'tao', 'yuan', 'pi', 'chang', 'gao', 'qi', 'yuan', 'tang', 'teng',
   0x20 => 'shu', 'shu', 'fen', 'fei', 'wen', 'ba', 'diao', 'tuo', 'zhong', 'qu', 'sheng', 'shi', 'you', 'shi', 'ting', 'wu',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xa0.php b/core/lib/Drupal/Component/Transliteration/data/xa0.php
index b7fee6243321582bc097acf432d16cc0e1afe073..ca55187fe2d0b713604a3d8599a12485361b5815 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xa0.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xa0.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'it', 'ix', 'i', 'ip', 'iet', 'iex', 'ie', 'iep', 'at', 'ax', 'a', 'ap', 'uox', 'uo', 'uop', 'ot',
   0x10 => 'ox', 'o', 'op', 'ex', 'e', 'wu', 'bit', 'bix', 'bi', 'bip', 'biet', 'biex', 'bie', 'biep', 'bat', 'bax',
   0x20 => 'ba', 'bap', 'buox', 'buo', 'buop', 'bot', 'box', 'bo', 'bop', 'bex', 'be', 'bep', 'but', 'bux', 'bu', 'bup',
@@ -22,4 +22,4 @@
   0xD0 => 'fip', 'fat', 'fax', 'fa', 'fap', 'fox', 'fo', 'fop', 'fut', 'fux', 'fu', 'fup', 'furx', 'fur', 'fyt', 'fyx',
   0xE0 => 'fy', 'fyp', 'vit', 'vix', 'vi', 'vip', 'viet', 'viex', 'vie', 'viep', 'vat', 'vax', 'va', 'vap', 'vot', 'vox',
   0xF0 => 'vo', 'vop', 'vex', 'vep', 'vut', 'vux', 'vu', 'vup', 'vurx', 'vur', 'vyt', 'vyx', 'vy', 'vyp', 'vyrx', 'vyr',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xa1.php b/core/lib/Drupal/Component/Transliteration/data/xa1.php
index 66cc4466e8169a63218186f96b4dcbd9e0571c5f..19ca96ec053897ae4e2b934a8d8fb8257fdf8f4d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xa1.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xa1.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'dit', 'dix', 'di', 'dip', 'diex', 'die', 'diep', 'dat', 'dax', 'da', 'dap', 'duox', 'duo', 'dot', 'dox', 'do',
   0x10 => 'dop', 'dex', 'de', 'dep', 'dut', 'dux', 'du', 'dup', 'durx', 'dur', 'tit', 'tix', 'ti', 'tip', 'tiex', 'tie',
   0x20 => 'tiep', 'tat', 'tax', 'ta', 'tap', 'tuot', 'tuox', 'tuo', 'tuop', 'tot', 'tox', 'to', 'top', 'tex', 'te', 'tep',
@@ -22,4 +22,4 @@
   0xD0 => 'lu', 'lup', 'lurx', 'lur', 'lyt', 'lyx', 'ly', 'lyp', 'lyrx', 'lyr', 'git', 'gix', 'gi', 'gip', 'giet', 'giex',
   0xE0 => 'gie', 'giep', 'gat', 'gax', 'ga', 'gap', 'guot', 'guox', 'guo', 'guop', 'got', 'gox', 'go', 'gop', 'get', 'gex',
   0xF0 => 'ge', 'gep', 'gut', 'gux', 'gu', 'gup', 'gurx', 'gur', 'kit', 'kix', 'ki', 'kip', 'kiex', 'kie', 'kiep', 'kat',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xa2.php b/core/lib/Drupal/Component/Transliteration/data/xa2.php
index 95d4c8c6ef153b1c146939a4bf99c557171ca5ae..0603d5fb985f46219bce7f1caa5f7e11f6299ff1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xa2.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xa2.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'kax', 'ka', 'kap', 'kuox', 'kuo', 'kuop', 'kot', 'kox', 'ko', 'kop', 'ket', 'kex', 'ke', 'kep', 'kut', 'kux',
   0x10 => 'ku', 'kup', 'kurx', 'kur', 'ggit', 'ggix', 'ggi', 'ggiex', 'ggie', 'ggiep', 'ggat', 'ggax', 'gga', 'ggap', 'gguot', 'gguox',
   0x20 => 'gguo', 'gguop', 'ggot', 'ggox', 'ggo', 'ggop', 'gget', 'ggex', 'gge', 'ggep', 'ggut', 'ggux', 'ggu', 'ggup', 'ggurx', 'ggur',
@@ -22,4 +22,4 @@
   0xD0 => 'zzit', 'zzix', 'zzi', 'zzip', 'zziet', 'zziex', 'zzie', 'zziep', 'zzat', 'zzax', 'zza', 'zzap', 'zzox', 'zzo', 'zzop', 'zzex',
   0xE0 => 'zze', 'zzep', 'zzux', 'zzu', 'zzup', 'zzurx', 'zzur', 'zzyt', 'zzyx', 'zzy', 'zzyp', 'zzyrx', 'zzyr', 'nzit', 'nzix', 'nzi',
   0xF0 => 'nzip', 'nziex', 'nzie', 'nziep', 'nzat', 'nzax', 'nza', 'nzap', 'nzuox', 'nzuo', 'nzox', 'nzop', 'nzex', 'nze', 'nzux', 'nzu',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xa3.php b/core/lib/Drupal/Component/Transliteration/data/xa3.php
index a63b2815986a7c4f954d7912bcc5131cb87025d1..207736f930ac88ab1035839dbfb853d669b4a0a9 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xa3.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xa3.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'nzup', 'nzurx', 'nzur', 'nzyt', 'nzyx', 'nzy', 'nzyp', 'nzyrx', 'nzyr', 'sit', 'six', 'si', 'sip', 'siex', 'sie', 'siep',
   0x10 => 'sat', 'sax', 'sa', 'sap', 'suox', 'suo', 'suop', 'sot', 'sox', 'so', 'sop', 'sex', 'se', 'sep', 'sut', 'sux',
   0x20 => 'su', 'sup', 'surx', 'sur', 'syt', 'syx', 'sy', 'syp', 'syrx', 'syr', 'ssit', 'ssix', 'ssi', 'ssip', 'ssiex', 'ssie',
@@ -22,4 +22,4 @@
   0xD0 => 'rop', 'rex', 're', 'rep', 'rut', 'rux', 'ru', 'rup', 'rurx', 'rur', 'ryt', 'ryx', 'ry', 'ryp', 'ryrx', 'ryr',
   0xE0 => 'jit', 'jix', 'ji', 'jip', 'jiet', 'jiex', 'jie', 'jiep', 'juot', 'juox', 'juo', 'juop', 'jot', 'jox', 'jo', 'jop',
   0xF0 => 'jut', 'jux', 'ju', 'jup', 'jurx', 'jur', 'jyt', 'jyx', 'jy', 'jyp', 'jyrx', 'jyr', 'qit', 'qix', 'qi', 'qip',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xa4.php b/core/lib/Drupal/Component/Transliteration/data/xa4.php
index 2210454a8ecd4554c70a99d069e87f1b533dc63a..736b03ca274736a9fb0cd4c9dc92a363f2a3c567 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xa4.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xa4.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'qiet', 'qiex', 'qie', 'qiep', 'quot', 'quox', 'quo', 'quop', 'qot', 'qox', 'qo', 'qop', 'qut', 'qux', 'qu', 'qup',
   0x10 => 'qurx', 'qur', 'qyt', 'qyx', 'qy', 'qyp', 'qyrx', 'qyr', 'jjit', 'jjix', 'jji', 'jjip', 'jjiet', 'jjiex', 'jjie', 'jjiep',
   0x20 => 'jjuox', 'jjuo', 'jjuop', 'jjot', 'jjox', 'jjo', 'jjop', 'jjut', 'jjux', 'jju', 'jjup', 'jjurx', 'jjur', 'jjyt', 'jjyx', 'jjy',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xac.php b/core/lib/Drupal/Component/Transliteration/data/xac.php
index 87c2d1438686f786bebd220495c149894c7d3112..7ece9df0467fcd768d11f39ff4bbf41dee18986b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xac.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xac.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ga', 'gag', 'gakk', 'gags', 'gan', 'ganj', 'ganh', 'gad', 'gal', 'galg', 'galm', 'galb', 'gals', 'galt', 'galp', 'galh',
   0x10 => 'gam', 'gab', 'gabs', 'gas', 'gass', 'gang', 'gaj', 'gach', 'gak', 'gat', 'gap', 'gah', 'gae', 'gaeg', 'gaekk', 'gaegs',
   0x20 => 'gaen', 'gaenj', 'gaenh', 'gaed', 'gael', 'gaelg', 'gaelm', 'gaelb', 'gaels', 'gaelt', 'gaelp', 'gaelh', 'gaem', 'gaeb', 'gaebs', 'gaes',
@@ -22,4 +22,4 @@
   0xD0 => 'gyels', 'gyelt', 'gyelp', 'gyelh', 'gyem', 'gyeb', 'gyebs', 'gyes', 'gyess', 'gyeng', 'gyej', 'gyech', 'gyek', 'gyet', 'gyep', 'gyeh',
   0xE0 => 'go', 'gog', 'gokk', 'gogs', 'gon', 'gonj', 'gonh', 'god', 'gol', 'golg', 'golm', 'golb', 'gols', 'golt', 'golp', 'golh',
   0xF0 => 'gom', 'gob', 'gobs', 'gos', 'goss', 'gong', 'goj', 'goch', 'gok', 'got', 'gop', 'goh', 'gwa', 'gwag', 'gwakk', 'gwags',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xad.php b/core/lib/Drupal/Component/Transliteration/data/xad.php
index 4e8eb27d21ac053952ce4c6937d851ee50caf755..8dd61dee9cfe19fe492680dbbcbccccef48800b5 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xad.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xad.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'gwan', 'gwanj', 'gwanh', 'gwad', 'gwal', 'gwalg', 'gwalm', 'gwalb', 'gwals', 'gwalt', 'gwalp', 'gwalh', 'gwam', 'gwab', 'gwabs', 'gwas',
   0x10 => 'gwass', 'gwang', 'gwaj', 'gwach', 'gwak', 'gwat', 'gwap', 'gwah', 'gwae', 'gwaeg', 'gwaekk', 'gwaegs', 'gwaen', 'gwaenj', 'gwaenh', 'gwaed',
   0x20 => 'gwael', 'gwaelg', 'gwaelm', 'gwaelb', 'gwaels', 'gwaelt', 'gwaelp', 'gwaelh', 'gwaem', 'gwaeb', 'gwaebs', 'gwaes', 'gwaess', 'gwaeng', 'gwaej', 'gwaech',
@@ -22,4 +22,4 @@
   0xD0 => 'gwim', 'gwib', 'gwibs', 'gwis', 'gwiss', 'gwing', 'gwij', 'gwich', 'gwik', 'gwit', 'gwip', 'gwih', 'gyu', 'gyug', 'gyukk', 'gyugs',
   0xE0 => 'gyun', 'gyunj', 'gyunh', 'gyud', 'gyul', 'gyulg', 'gyulm', 'gyulb', 'gyuls', 'gyult', 'gyulp', 'gyulh', 'gyum', 'gyub', 'gyubs', 'gyus',
   0xF0 => 'gyuss', 'gyung', 'gyuj', 'gyuch', 'gyuk', 'gyut', 'gyup', 'gyuh', 'geu', 'geug', 'geukk', 'geugs', 'geun', 'geunj', 'geunh', 'geud',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xae.php b/core/lib/Drupal/Component/Transliteration/data/xae.php
index 52f7f5c40b706e7da0bf8feb0328a07e6d480bba..1584a5c01bad866ff43be8473eb3e558fe897a75 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xae.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xae.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'geul', 'geulg', 'geulm', 'geulb', 'geuls', 'geult', 'geulp', 'geulh', 'geum', 'geub', 'geubs', 'geus', 'geuss', 'geung', 'geuj', 'geuch',
   0x10 => 'geuk', 'geut', 'geup', 'geuh', 'gui', 'guig', 'guikk', 'guigs', 'guin', 'guinj', 'guinh', 'guid', 'guil', 'guilg', 'guilm', 'guilb',
   0x20 => 'guils', 'guilt', 'guilp', 'guilh', 'guim', 'guib', 'guibs', 'guis', 'guiss', 'guing', 'guij', 'guich', 'guik', 'guit', 'guip', 'guih',
@@ -22,4 +22,4 @@
   0xD0 => 'kkeoss', 'kkeong', 'kkeoj', 'kkeoch', 'kkeok', 'kkeot', 'kkeop', 'kkeoh', 'kke', 'kkeg', 'kkekk', 'kkegs', 'kken', 'kkenj', 'kkenh', 'kked',
   0xE0 => 'kkel', 'kkelg', 'kkelm', 'kkelb', 'kkels', 'kkelt', 'kkelp', 'kkelh', 'kkem', 'kkeb', 'kkebs', 'kkes', 'kkess', 'kkeng', 'kkej', 'kkech',
   0xF0 => 'kkek', 'kket', 'kkep', 'kkeh', 'kkyeo', 'kkyeog', 'kkyeokk', 'kkyeogs', 'kkyeon', 'kkyeonj', 'kkyeonh', 'kkyeod', 'kkyeol', 'kkyeolg', 'kkyeolm', 'kkyeolb',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xaf.php b/core/lib/Drupal/Component/Transliteration/data/xaf.php
index e5f37fe450f228f80ac272be0cf2b3bf2f8181b8..26c61c5cbe2e485a424286368d4fdad58570c523 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xaf.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xaf.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'kkyeols', 'kkyeolt', 'kkyeolp', 'kkyeolh', 'kkyeom', 'kkyeob', 'kkyeobs', 'kkyeos', 'kkyeoss', 'kkyeong', 'kkyeoj', 'kkyeoch', 'kkyeok', 'kkyeot', 'kkyeop', 'kkyeoh',
   0x10 => 'kkye', 'kkyeg', 'kkyekk', 'kkyegs', 'kkyen', 'kkyenj', 'kkyenh', 'kkyed', 'kkyel', 'kkyelg', 'kkyelm', 'kkyelb', 'kkyels', 'kkyelt', 'kkyelp', 'kkyelh',
   0x20 => 'kkyem', 'kkyeb', 'kkyebs', 'kkyes', 'kkyess', 'kkyeng', 'kkyej', 'kkyech', 'kkyek', 'kkyet', 'kkyep', 'kkyeh', 'kko', 'kkog', 'kkokk', 'kkogs',
@@ -22,4 +22,4 @@
   0xD0 => 'kkuk', 'kkut', 'kkup', 'kkuh', 'kkwo', 'kkwog', 'kkwokk', 'kkwogs', 'kkwon', 'kkwonj', 'kkwonh', 'kkwod', 'kkwol', 'kkwolg', 'kkwolm', 'kkwolb',
   0xE0 => 'kkwols', 'kkwolt', 'kkwolp', 'kkwolh', 'kkwom', 'kkwob', 'kkwobs', 'kkwos', 'kkwoss', 'kkwong', 'kkwoj', 'kkwoch', 'kkwok', 'kkwot', 'kkwop', 'kkwoh',
   0xF0 => 'kkwe', 'kkweg', 'kkwekk', 'kkwegs', 'kkwen', 'kkwenj', 'kkwenh', 'kkwed', 'kkwel', 'kkwelg', 'kkwelm', 'kkwelb', 'kkwels', 'kkwelt', 'kkwelp', 'kkwelh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb0.php b/core/lib/Drupal/Component/Transliteration/data/xb0.php
index 96071fde975aa6a61637cda7aa2eaf17de7b61bc..0ebe370702565e0c6c0d2254da711d2b4829a46b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb0.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb0.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'kkwem', 'kkweb', 'kkwebs', 'kkwes', 'kkwess', 'kkweng', 'kkwej', 'kkwech', 'kkwek', 'kkwet', 'kkwep', 'kkweh', 'kkwi', 'kkwig', 'kkwikk', 'kkwigs',
   0x10 => 'kkwin', 'kkwinj', 'kkwinh', 'kkwid', 'kkwil', 'kkwilg', 'kkwilm', 'kkwilb', 'kkwils', 'kkwilt', 'kkwilp', 'kkwilh', 'kkwim', 'kkwib', 'kkwibs', 'kkwis',
   0x20 => 'kkwiss', 'kkwing', 'kkwij', 'kkwich', 'kkwik', 'kkwit', 'kkwip', 'kkwih', 'kkyu', 'kkyug', 'kkyukk', 'kkyugs', 'kkyun', 'kkyunj', 'kkyunh', 'kkyud',
@@ -22,4 +22,4 @@
   0xD0 => 'nya', 'nyag', 'nyakk', 'nyags', 'nyan', 'nyanj', 'nyanh', 'nyad', 'nyal', 'nyalg', 'nyalm', 'nyalb', 'nyals', 'nyalt', 'nyalp', 'nyalh',
   0xE0 => 'nyam', 'nyab', 'nyabs', 'nyas', 'nyass', 'nyang', 'nyaj', 'nyach', 'nyak', 'nyat', 'nyap', 'nyah', 'nyae', 'nyaeg', 'nyaekk', 'nyaegs',
   0xF0 => 'nyaen', 'nyaenj', 'nyaenh', 'nyaed', 'nyael', 'nyaelg', 'nyaelm', 'nyaelb', 'nyaels', 'nyaelt', 'nyaelp', 'nyaelh', 'nyaem', 'nyaeb', 'nyaebs', 'nyaes',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb1.php b/core/lib/Drupal/Component/Transliteration/data/xb1.php
index d90ecfce3bc13b4f06271ba10869fb06a104fcd5..2f4d010cd314d599dc3c00dddc3c3fcda11b2879 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb1.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb1.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'nyaess', 'nyaeng', 'nyaej', 'nyaech', 'nyaek', 'nyaet', 'nyaep', 'nyaeh', 'neo', 'neog', 'neokk', 'neogs', 'neon', 'neonj', 'neonh', 'neod',
   0x10 => 'neol', 'neolg', 'neolm', 'neolb', 'neols', 'neolt', 'neolp', 'neolh', 'neom', 'neob', 'neobs', 'neos', 'neoss', 'neong', 'neoj', 'neoch',
   0x20 => 'neok', 'neot', 'neop', 'neoh', 'ne', 'neg', 'nekk', 'negs', 'nen', 'nenj', 'nenh', 'ned', 'nel', 'nelg', 'nelm', 'nelb',
@@ -22,4 +22,4 @@
   0xD0 => 'noen', 'noenj', 'noenh', 'noed', 'noel', 'noelg', 'noelm', 'noelb', 'noels', 'noelt', 'noelp', 'noelh', 'noem', 'noeb', 'noebs', 'noes',
   0xE0 => 'noess', 'noeng', 'noej', 'noech', 'noek', 'noet', 'noep', 'noeh', 'nyo', 'nyog', 'nyokk', 'nyogs', 'nyon', 'nyonj', 'nyonh', 'nyod',
   0xF0 => 'nyol', 'nyolg', 'nyolm', 'nyolb', 'nyols', 'nyolt', 'nyolp', 'nyolh', 'nyom', 'nyob', 'nyobs', 'nyos', 'nyoss', 'nyong', 'nyoj', 'nyoch',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb2.php b/core/lib/Drupal/Component/Transliteration/data/xb2.php
index 1dced88cb73f721aa832d8cb64dda288d414aebd..ef3617bdcf6da89bbf6583e552eae05bccf622f9 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb2.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb2.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'nyok', 'nyot', 'nyop', 'nyoh', 'nu', 'nug', 'nukk', 'nugs', 'nun', 'nunj', 'nunh', 'nud', 'nul', 'nulg', 'nulm', 'nulb',
   0x10 => 'nuls', 'nult', 'nulp', 'nulh', 'num', 'nub', 'nubs', 'nus', 'nuss', 'nung', 'nuj', 'nuch', 'nuk', 'nut', 'nup', 'nuh',
   0x20 => 'nwo', 'nwog', 'nwokk', 'nwogs', 'nwon', 'nwonj', 'nwonh', 'nwod', 'nwol', 'nwolg', 'nwolm', 'nwolb', 'nwols', 'nwolt', 'nwolp', 'nwolh',
@@ -22,4 +22,4 @@
   0xD0 => 'nil', 'nilg', 'nilm', 'nilb', 'nils', 'nilt', 'nilp', 'nilh', 'nim', 'nib', 'nibs', 'nis', 'niss', 'ning', 'nij', 'nich',
   0xE0 => 'nik', 'nit', 'nip', 'nih', 'da', 'dag', 'dakk', 'dags', 'dan', 'danj', 'danh', 'dad', 'dal', 'dalg', 'dalm', 'dalb',
   0xF0 => 'dals', 'dalt', 'dalp', 'dalh', 'dam', 'dab', 'dabs', 'das', 'dass', 'dang', 'daj', 'dach', 'dak', 'dat', 'dap', 'dah',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb3.php b/core/lib/Drupal/Component/Transliteration/data/xb3.php
index 37a9a07241fb180896651ac92eb974fb0176bfa0..6b798078fc26f4123ccb402b8f07c64674ca9d73 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb3.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb3.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'dae', 'daeg', 'daekk', 'daegs', 'daen', 'daenj', 'daenh', 'daed', 'dael', 'daelg', 'daelm', 'daelb', 'daels', 'daelt', 'daelp', 'daelh',
   0x10 => 'daem', 'daeb', 'daebs', 'daes', 'daess', 'daeng', 'daej', 'daech', 'daek', 'daet', 'daep', 'daeh', 'dya', 'dyag', 'dyakk', 'dyags',
   0x20 => 'dyan', 'dyanj', 'dyanh', 'dyad', 'dyal', 'dyalg', 'dyalm', 'dyalb', 'dyals', 'dyalt', 'dyalp', 'dyalh', 'dyam', 'dyab', 'dyabs', 'dyas',
@@ -22,4 +22,4 @@
   0xD0 => 'dols', 'dolt', 'dolp', 'dolh', 'dom', 'dob', 'dobs', 'dos', 'doss', 'dong', 'doj', 'doch', 'dok', 'dot', 'dop', 'doh',
   0xE0 => 'dwa', 'dwag', 'dwakk', 'dwags', 'dwan', 'dwanj', 'dwanh', 'dwad', 'dwal', 'dwalg', 'dwalm', 'dwalb', 'dwals', 'dwalt', 'dwalp', 'dwalh',
   0xF0 => 'dwam', 'dwab', 'dwabs', 'dwas', 'dwass', 'dwang', 'dwaj', 'dwach', 'dwak', 'dwat', 'dwap', 'dwah', 'dwae', 'dwaeg', 'dwaekk', 'dwaegs',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb4.php b/core/lib/Drupal/Component/Transliteration/data/xb4.php
index 2c46b3a771c80e88db8e96e709b0f1ed7ebe65d7..0ae19d4472e468d06c297d910b6df8e3668a1618 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb4.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb4.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'dwaen', 'dwaenj', 'dwaenh', 'dwaed', 'dwael', 'dwaelg', 'dwaelm', 'dwaelb', 'dwaels', 'dwaelt', 'dwaelp', 'dwaelh', 'dwaem', 'dwaeb', 'dwaebs', 'dwaes',
   0x10 => 'dwaess', 'dwaeng', 'dwaej', 'dwaech', 'dwaek', 'dwaet', 'dwaep', 'dwaeh', 'doe', 'doeg', 'doekk', 'doegs', 'doen', 'doenj', 'doenh', 'doed',
   0x20 => 'doel', 'doelg', 'doelm', 'doelb', 'doels', 'doelt', 'doelp', 'doelh', 'doem', 'doeb', 'doebs', 'does', 'doess', 'doeng', 'doej', 'doech',
@@ -22,4 +22,4 @@
   0xD0 => 'dyum', 'dyub', 'dyubs', 'dyus', 'dyuss', 'dyung', 'dyuj', 'dyuch', 'dyuk', 'dyut', 'dyup', 'dyuh', 'deu', 'deug', 'deukk', 'deugs',
   0xE0 => 'deun', 'deunj', 'deunh', 'deud', 'deul', 'deulg', 'deulm', 'deulb', 'deuls', 'deult', 'deulp', 'deulh', 'deum', 'deub', 'deubs', 'deus',
   0xF0 => 'deuss', 'deung', 'deuj', 'deuch', 'deuk', 'deut', 'deup', 'deuh', 'dui', 'duig', 'duikk', 'duigs', 'duin', 'duinj', 'duinh', 'duid',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb5.php b/core/lib/Drupal/Component/Transliteration/data/xb5.php
index ee61e54303efb548054405e034744bb28ea2438d..22be8a0ac8a99b0c455d2de9036f01e2f25fd8f9 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb5.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb5.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'duil', 'duilg', 'duilm', 'duilb', 'duils', 'duilt', 'duilp', 'duilh', 'duim', 'duib', 'duibs', 'duis', 'duiss', 'duing', 'duij', 'duich',
   0x10 => 'duik', 'duit', 'duip', 'duih', 'di', 'dig', 'dikk', 'digs', 'din', 'dinj', 'dinh', 'did', 'dil', 'dilg', 'dilm', 'dilb',
   0x20 => 'dils', 'dilt', 'dilp', 'dilh', 'dim', 'dib', 'dibs', 'dis', 'diss', 'ding', 'dij', 'dich', 'dik', 'dit', 'dip', 'dih',
@@ -22,4 +22,4 @@
   0xD0 => 'ttess', 'tteng', 'ttej', 'ttech', 'ttek', 'ttet', 'ttep', 'tteh', 'ttyeo', 'ttyeog', 'ttyeokk', 'ttyeogs', 'ttyeon', 'ttyeonj', 'ttyeonh', 'ttyeod',
   0xE0 => 'ttyeol', 'ttyeolg', 'ttyeolm', 'ttyeolb', 'ttyeols', 'ttyeolt', 'ttyeolp', 'ttyeolh', 'ttyeom', 'ttyeob', 'ttyeobs', 'ttyeos', 'ttyeoss', 'ttyeong', 'ttyeoj', 'ttyeoch',
   0xF0 => 'ttyeok', 'ttyeot', 'ttyeop', 'ttyeoh', 'ttye', 'ttyeg', 'ttyekk', 'ttyegs', 'ttyen', 'ttyenj', 'ttyenh', 'ttyed', 'ttyel', 'ttyelg', 'ttyelm', 'ttyelb',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb6.php b/core/lib/Drupal/Component/Transliteration/data/xb6.php
index 5b209ee8110c181c35e04fdb0779c7d66d85d82e..9a40cdcc2b899e825df8148a780903355991abad 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb6.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb6.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ttyels', 'ttyelt', 'ttyelp', 'ttyelh', 'ttyem', 'ttyeb', 'ttyebs', 'ttyes', 'ttyess', 'ttyeng', 'ttyej', 'ttyech', 'ttyek', 'ttyet', 'ttyep', 'ttyeh',
   0x10 => 'tto', 'ttog', 'ttokk', 'ttogs', 'tton', 'ttonj', 'ttonh', 'ttod', 'ttol', 'ttolg', 'ttolm', 'ttolb', 'ttols', 'ttolt', 'ttolp', 'ttolh',
   0x20 => 'ttom', 'ttob', 'ttobs', 'ttos', 'ttoss', 'ttong', 'ttoj', 'ttoch', 'ttok', 'ttot', 'ttop', 'ttoh', 'ttwa', 'ttwag', 'ttwakk', 'ttwags',
@@ -22,4 +22,4 @@
   0xD0 => 'ttwok', 'ttwot', 'ttwop', 'ttwoh', 'ttwe', 'ttweg', 'ttwekk', 'ttwegs', 'ttwen', 'ttwenj', 'ttwenh', 'ttwed', 'ttwel', 'ttwelg', 'ttwelm', 'ttwelb',
   0xE0 => 'ttwels', 'ttwelt', 'ttwelp', 'ttwelh', 'ttwem', 'ttweb', 'ttwebs', 'ttwes', 'ttwess', 'ttweng', 'ttwej', 'ttwech', 'ttwek', 'ttwet', 'ttwep', 'ttweh',
   0xF0 => 'ttwi', 'ttwig', 'ttwikk', 'ttwigs', 'ttwin', 'ttwinj', 'ttwinh', 'ttwid', 'ttwil', 'ttwilg', 'ttwilm', 'ttwilb', 'ttwils', 'ttwilt', 'ttwilp', 'ttwilh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb7.php b/core/lib/Drupal/Component/Transliteration/data/xb7.php
index c19b876fde45ada1cb832b7107b385ce06d6722f..419dbe1bc313866670fb5d15f80d5ccd02677004 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb7.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb7.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ttwim', 'ttwib', 'ttwibs', 'ttwis', 'ttwiss', 'ttwing', 'ttwij', 'ttwich', 'ttwik', 'ttwit', 'ttwip', 'ttwih', 'ttyu', 'ttyug', 'ttyukk', 'ttyugs',
   0x10 => 'ttyun', 'ttyunj', 'ttyunh', 'ttyud', 'ttyul', 'ttyulg', 'ttyulm', 'ttyulb', 'ttyuls', 'ttyult', 'ttyulp', 'ttyulh', 'ttyum', 'ttyub', 'ttyubs', 'ttyus',
   0x20 => 'ttyuss', 'ttyung', 'ttyuj', 'ttyuch', 'ttyuk', 'ttyut', 'ttyup', 'ttyuh', 'tteu', 'tteug', 'tteukk', 'tteugs', 'tteun', 'tteunj', 'tteunh', 'tteud',
@@ -22,4 +22,4 @@
   0xD0 => 'lyae', 'lyaeg', 'lyaekk', 'lyaegs', 'lyaen', 'lyaenj', 'lyaenh', 'lyaed', 'lyael', 'lyaelg', 'lyaelm', 'lyaelb', 'lyaels', 'lyaelt', 'lyaelp', 'lyaelh',
   0xE0 => 'lyaem', 'lyaeb', 'lyaebs', 'lyaes', 'lyaess', 'lyaeng', 'lyaej', 'lyaech', 'lyaek', 'lyaet', 'lyaep', 'lyaeh', 'leo', 'leog', 'leokk', 'leogs',
   0xF0 => 'leon', 'leonj', 'leonh', 'leod', 'leol', 'leolg', 'leolm', 'leolb', 'leols', 'leolt', 'leolp', 'leolh', 'leom', 'leob', 'leobs', 'leos',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb8.php b/core/lib/Drupal/Component/Transliteration/data/xb8.php
index 3743ce2a1e5f2537d4d61e44d612e25393611bc1..0abd8a036f0e97aaa9fd8b93fdb331242285ff3a 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb8.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb8.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'leoss', 'leong', 'leoj', 'leoch', 'leok', 'leot', 'leop', 'leoh', 'le', 'leg', 'lekk', 'legs', 'len', 'lenj', 'lenh', 'led',
   0x10 => 'lel', 'lelg', 'lelm', 'lelb', 'lels', 'lelt', 'lelp', 'lelh', 'lem', 'leb', 'lebs', 'les', 'less', 'leng', 'lej', 'lech',
   0x20 => 'lek', 'let', 'lep', 'leh', 'lyeo', 'lyeog', 'lyeokk', 'lyeogs', 'lyeon', 'lyeonj', 'lyeonh', 'lyeod', 'lyeol', 'lyeolg', 'lyeolm', 'lyeolb',
@@ -22,4 +22,4 @@
   0xD0 => 'lyon', 'lyonj', 'lyonh', 'lyod', 'lyol', 'lyolg', 'lyolm', 'lyolb', 'lyols', 'lyolt', 'lyolp', 'lyolh', 'lyom', 'lyob', 'lyobs', 'lyos',
   0xE0 => 'lyoss', 'lyong', 'lyoj', 'lyoch', 'lyok', 'lyot', 'lyop', 'lyoh', 'lu', 'lug', 'lukk', 'lugs', 'lun', 'lunj', 'lunh', 'lud',
   0xF0 => 'lul', 'lulg', 'lulm', 'lulb', 'luls', 'lult', 'lulp', 'lulh', 'lum', 'lub', 'lubs', 'lus', 'luss', 'lung', 'luj', 'luch',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xb9.php b/core/lib/Drupal/Component/Transliteration/data/xb9.php
index 0307106cf8a9f40cdc0d9cf7b3f37709b2071e3f..9b5fcd157a20572c00281feb36be14836bd5de8b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xb9.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xb9.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'luk', 'lut', 'lup', 'luh', 'lwo', 'lwog', 'lwokk', 'lwogs', 'lwon', 'lwonj', 'lwonh', 'lwod', 'lwol', 'lwolg', 'lwolm', 'lwolb',
   0x10 => 'lwols', 'lwolt', 'lwolp', 'lwolh', 'lwom', 'lwob', 'lwobs', 'lwos', 'lwoss', 'lwong', 'lwoj', 'lwoch', 'lwok', 'lwot', 'lwop', 'lwoh',
   0x20 => 'lwe', 'lweg', 'lwekk', 'lwegs', 'lwen', 'lwenj', 'lwenh', 'lwed', 'lwel', 'lwelg', 'lwelm', 'lwelb', 'lwels', 'lwelt', 'lwelp', 'lwelh',
@@ -22,4 +22,4 @@
   0xD0 => 'mal', 'malg', 'malm', 'malb', 'mals', 'malt', 'malp', 'malh', 'mam', 'mab', 'mabs', 'mas', 'mass', 'mang', 'maj', 'mach',
   0xE0 => 'mak', 'mat', 'map', 'mah', 'mae', 'maeg', 'maekk', 'maegs', 'maen', 'maenj', 'maenh', 'maed', 'mael', 'maelg', 'maelm', 'maelb',
   0xF0 => 'maels', 'maelt', 'maelp', 'maelh', 'maem', 'maeb', 'maebs', 'maes', 'maess', 'maeng', 'maej', 'maech', 'maek', 'maet', 'maep', 'maeh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xba.php b/core/lib/Drupal/Component/Transliteration/data/xba.php
index 30878974e3cc6bc49fc382b55d36814b041ffdf2..5a5448a39d17df8f086bfaebaa7e4c5bc9d088d5 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xba.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xba.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'mya', 'myag', 'myakk', 'myags', 'myan', 'myanj', 'myanh', 'myad', 'myal', 'myalg', 'myalm', 'myalb', 'myals', 'myalt', 'myalp', 'myalh',
   0x10 => 'myam', 'myab', 'myabs', 'myas', 'myass', 'myang', 'myaj', 'myach', 'myak', 'myat', 'myap', 'myah', 'myae', 'myaeg', 'myaekk', 'myaegs',
   0x20 => 'myaen', 'myaenj', 'myaenh', 'myaed', 'myael', 'myaelg', 'myaelm', 'myaelb', 'myaels', 'myaelt', 'myaelp', 'myaelh', 'myaem', 'myaeb', 'myaebs', 'myaes',
@@ -22,4 +22,4 @@
   0xD0 => 'mwals', 'mwalt', 'mwalp', 'mwalh', 'mwam', 'mwab', 'mwabs', 'mwas', 'mwass', 'mwang', 'mwaj', 'mwach', 'mwak', 'mwat', 'mwap', 'mwah',
   0xE0 => 'mwae', 'mwaeg', 'mwaekk', 'mwaegs', 'mwaen', 'mwaenj', 'mwaenh', 'mwaed', 'mwael', 'mwaelg', 'mwaelm', 'mwaelb', 'mwaels', 'mwaelt', 'mwaelp', 'mwaelh',
   0xF0 => 'mwaem', 'mwaeb', 'mwaebs', 'mwaes', 'mwaess', 'mwaeng', 'mwaej', 'mwaech', 'mwaek', 'mwaet', 'mwaep', 'mwaeh', 'moe', 'moeg', 'moekk', 'moegs',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xbb.php b/core/lib/Drupal/Component/Transliteration/data/xbb.php
index 0f582fa79f0892af0933f379b02baa02a3145cfb..1b1ab3ce06c418f052b7f031b78b7ee673c15da6 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xbb.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xbb.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'moen', 'moenj', 'moenh', 'moed', 'moel', 'moelg', 'moelm', 'moelb', 'moels', 'moelt', 'moelp', 'moelh', 'moem', 'moeb', 'moebs', 'moes',
   0x10 => 'moess', 'moeng', 'moej', 'moech', 'moek', 'moet', 'moep', 'moeh', 'myo', 'myog', 'myokk', 'myogs', 'myon', 'myonj', 'myonh', 'myod',
   0x20 => 'myol', 'myolg', 'myolm', 'myolb', 'myols', 'myolt', 'myolp', 'myolh', 'myom', 'myob', 'myobs', 'myos', 'myoss', 'myong', 'myoj', 'myoch',
@@ -22,4 +22,4 @@
   0xD0 => 'meum', 'meub', 'meubs', 'meus', 'meuss', 'meung', 'meuj', 'meuch', 'meuk', 'meut', 'meup', 'meuh', 'mui', 'muig', 'muikk', 'muigs',
   0xE0 => 'muin', 'muinj', 'muinh', 'muid', 'muil', 'muilg', 'muilm', 'muilb', 'muils', 'muilt', 'muilp', 'muilh', 'muim', 'muib', 'muibs', 'muis',
   0xF0 => 'muiss', 'muing', 'muij', 'muich', 'muik', 'muit', 'muip', 'muih', 'mi', 'mig', 'mikk', 'migs', 'min', 'minj', 'minh', 'mid',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xbc.php b/core/lib/Drupal/Component/Transliteration/data/xbc.php
index e145545c454cb5a218221e26b02887eb5a1e8573..df91ce6ae98e5d33c789bee06f800bfe77ac370a 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xbc.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xbc.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'mil', 'milg', 'milm', 'milb', 'mils', 'milt', 'milp', 'milh', 'mim', 'mib', 'mibs', 'mis', 'miss', 'ming', 'mij', 'mich',
   0x10 => 'mik', 'mit', 'mip', 'mih', 'ba', 'bag', 'bakk', 'bags', 'ban', 'banj', 'banh', 'bad', 'bal', 'balg', 'balm', 'balb',
   0x20 => 'bals', 'balt', 'balp', 'balh', 'bam', 'bab', 'babs', 'bas', 'bass', 'bang', 'baj', 'bach', 'bak', 'bat', 'bap', 'bah',
@@ -22,4 +22,4 @@
   0xD0 => 'byeoss', 'byeong', 'byeoj', 'byeoch', 'byeok', 'byeot', 'byeop', 'byeoh', 'bye', 'byeg', 'byekk', 'byegs', 'byen', 'byenj', 'byenh', 'byed',
   0xE0 => 'byel', 'byelg', 'byelm', 'byelb', 'byels', 'byelt', 'byelp', 'byelh', 'byem', 'byeb', 'byebs', 'byes', 'byess', 'byeng', 'byej', 'byech',
   0xF0 => 'byek', 'byet', 'byep', 'byeh', 'bo', 'bog', 'bokk', 'bogs', 'bon', 'bonj', 'bonh', 'bod', 'bol', 'bolg', 'bolm', 'bolb',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xbd.php b/core/lib/Drupal/Component/Transliteration/data/xbd.php
index 539bb316fe8887024a56fe477a11dbc929c9c477..5cb779c3ae96d5dd4cd355ae81867dde63d14623 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xbd.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xbd.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'bols', 'bolt', 'bolp', 'bolh', 'bom', 'bob', 'bobs', 'bos', 'boss', 'bong', 'boj', 'boch', 'bok', 'bot', 'bop', 'boh',
   0x10 => 'bwa', 'bwag', 'bwakk', 'bwags', 'bwan', 'bwanj', 'bwanh', 'bwad', 'bwal', 'bwalg', 'bwalm', 'bwalb', 'bwals', 'bwalt', 'bwalp', 'bwalh',
   0x20 => 'bwam', 'bwab', 'bwabs', 'bwas', 'bwass', 'bwang', 'bwaj', 'bwach', 'bwak', 'bwat', 'bwap', 'bwah', 'bwae', 'bwaeg', 'bwaekk', 'bwaegs',
@@ -22,4 +22,4 @@
   0xD0 => 'bwek', 'bwet', 'bwep', 'bweh', 'bwi', 'bwig', 'bwikk', 'bwigs', 'bwin', 'bwinj', 'bwinh', 'bwid', 'bwil', 'bwilg', 'bwilm', 'bwilb',
   0xE0 => 'bwils', 'bwilt', 'bwilp', 'bwilh', 'bwim', 'bwib', 'bwibs', 'bwis', 'bwiss', 'bwing', 'bwij', 'bwich', 'bwik', 'bwit', 'bwip', 'bwih',
   0xF0 => 'byu', 'byug', 'byukk', 'byugs', 'byun', 'byunj', 'byunh', 'byud', 'byul', 'byulg', 'byulm', 'byulb', 'byuls', 'byult', 'byulp', 'byulh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xbe.php b/core/lib/Drupal/Component/Transliteration/data/xbe.php
index 7d3bf6e825a4da9e7c85fcff882afd516427ac42..380003663aa1d16894343139cabb4d13acd8692a 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xbe.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xbe.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'byum', 'byub', 'byubs', 'byus', 'byuss', 'byung', 'byuj', 'byuch', 'byuk', 'byut', 'byup', 'byuh', 'beu', 'beug', 'beukk', 'beugs',
   0x10 => 'beun', 'beunj', 'beunh', 'beud', 'beul', 'beulg', 'beulm', 'beulb', 'beuls', 'beult', 'beulp', 'beulh', 'beum', 'beub', 'beubs', 'beus',
   0x20 => 'beuss', 'beung', 'beuj', 'beuch', 'beuk', 'beut', 'beup', 'beuh', 'bui', 'buig', 'buikk', 'buigs', 'buin', 'buinj', 'buinh', 'buid',
@@ -22,4 +22,4 @@
   0xD0 => 'ppeo', 'ppeog', 'ppeokk', 'ppeogs', 'ppeon', 'ppeonj', 'ppeonh', 'ppeod', 'ppeol', 'ppeolg', 'ppeolm', 'ppeolb', 'ppeols', 'ppeolt', 'ppeolp', 'ppeolh',
   0xE0 => 'ppeom', 'ppeob', 'ppeobs', 'ppeos', 'ppeoss', 'ppeong', 'ppeoj', 'ppeoch', 'ppeok', 'ppeot', 'ppeop', 'ppeoh', 'ppe', 'ppeg', 'ppekk', 'ppegs',
   0xF0 => 'ppen', 'ppenj', 'ppenh', 'pped', 'ppel', 'ppelg', 'ppelm', 'ppelb', 'ppels', 'ppelt', 'ppelp', 'ppelh', 'ppem', 'ppeb', 'ppebs', 'ppes',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xbf.php b/core/lib/Drupal/Component/Transliteration/data/xbf.php
index 5681ed1b84ceb90b4ac54bc6ad652701c1130197..e355651088e1fce13495017c9cdd1ec2103ede7f 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xbf.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xbf.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ppess', 'ppeng', 'ppej', 'ppech', 'ppek', 'ppet', 'ppep', 'ppeh', 'ppyeo', 'ppyeog', 'ppyeokk', 'ppyeogs', 'ppyeon', 'ppyeonj', 'ppyeonh', 'ppyeod',
   0x10 => 'ppyeol', 'ppyeolg', 'ppyeolm', 'ppyeolb', 'ppyeols', 'ppyeolt', 'ppyeolp', 'ppyeolh', 'ppyeom', 'ppyeob', 'ppyeobs', 'ppyeos', 'ppyeoss', 'ppyeong', 'ppyeoj', 'ppyeoch',
   0x20 => 'ppyeok', 'ppyeot', 'ppyeop', 'ppyeoh', 'ppye', 'ppyeg', 'ppyekk', 'ppyegs', 'ppyen', 'ppyenj', 'ppyenh', 'ppyed', 'ppyel', 'ppyelg', 'ppyelm', 'ppyelb',
@@ -22,4 +22,4 @@
   0xD0 => 'ppun', 'ppunj', 'ppunh', 'ppud', 'ppul', 'ppulg', 'ppulm', 'ppulb', 'ppuls', 'ppult', 'ppulp', 'ppulh', 'ppum', 'ppub', 'ppubs', 'ppus',
   0xE0 => 'ppuss', 'ppung', 'ppuj', 'ppuch', 'ppuk', 'pput', 'ppup', 'ppuh', 'ppwo', 'ppwog', 'ppwokk', 'ppwogs', 'ppwon', 'ppwonj', 'ppwonh', 'ppwod',
   0xF0 => 'ppwol', 'ppwolg', 'ppwolm', 'ppwolb', 'ppwols', 'ppwolt', 'ppwolp', 'ppwolh', 'ppwom', 'ppwob', 'ppwobs', 'ppwos', 'ppwoss', 'ppwong', 'ppwoj', 'ppwoch',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc0.php b/core/lib/Drupal/Component/Transliteration/data/xc0.php
index 89512d1b199ef1ce17234c76c1116c27ad9b03fa..003544e00e0a34981c13592f2a5d39b2fa244bf1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc0.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc0.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ppwok', 'ppwot', 'ppwop', 'ppwoh', 'ppwe', 'ppweg', 'ppwekk', 'ppwegs', 'ppwen', 'ppwenj', 'ppwenh', 'ppwed', 'ppwel', 'ppwelg', 'ppwelm', 'ppwelb',
   0x10 => 'ppwels', 'ppwelt', 'ppwelp', 'ppwelh', 'ppwem', 'ppweb', 'ppwebs', 'ppwes', 'ppwess', 'ppweng', 'ppwej', 'ppwech', 'ppwek', 'ppwet', 'ppwep', 'ppweh',
   0x20 => 'ppwi', 'ppwig', 'ppwikk', 'ppwigs', 'ppwin', 'ppwinj', 'ppwinh', 'ppwid', 'ppwil', 'ppwilg', 'ppwilm', 'ppwilb', 'ppwils', 'ppwilt', 'ppwilp', 'ppwilh',
@@ -22,4 +22,4 @@
   0xD0 => 'sael', 'saelg', 'saelm', 'saelb', 'saels', 'saelt', 'saelp', 'saelh', 'saem', 'saeb', 'saebs', 'saes', 'saess', 'saeng', 'saej', 'saech',
   0xE0 => 'saek', 'saet', 'saep', 'saeh', 'sya', 'syag', 'syakk', 'syags', 'syan', 'syanj', 'syanh', 'syad', 'syal', 'syalg', 'syalm', 'syalb',
   0xF0 => 'syals', 'syalt', 'syalp', 'syalh', 'syam', 'syab', 'syabs', 'syas', 'syass', 'syang', 'syaj', 'syach', 'syak', 'syat', 'syap', 'syah',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc1.php b/core/lib/Drupal/Component/Transliteration/data/xc1.php
index ae62f66674199138e606dd1ed5a8ce0dcb88a527..217d8772b0f844ffb00a365eb8d5150d44e56747 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc1.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc1.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'syae', 'syaeg', 'syaekk', 'syaegs', 'syaen', 'syaenj', 'syaenh', 'syaed', 'syael', 'syaelg', 'syaelm', 'syaelb', 'syaels', 'syaelt', 'syaelp', 'syaelh',
   0x10 => 'syaem', 'syaeb', 'syaebs', 'syaes', 'syaess', 'syaeng', 'syaej', 'syaech', 'syaek', 'syaet', 'syaep', 'syaeh', 'seo', 'seog', 'seokk', 'seogs',
   0x20 => 'seon', 'seonj', 'seonh', 'seod', 'seol', 'seolg', 'seolm', 'seolb', 'seols', 'seolt', 'seolp', 'seolh', 'seom', 'seob', 'seobs', 'seos',
@@ -22,4 +22,4 @@
   0xD0 => 'swaels', 'swaelt', 'swaelp', 'swaelh', 'swaem', 'swaeb', 'swaebs', 'swaes', 'swaess', 'swaeng', 'swaej', 'swaech', 'swaek', 'swaet', 'swaep', 'swaeh',
   0xE0 => 'soe', 'soeg', 'soekk', 'soegs', 'soen', 'soenj', 'soenh', 'soed', 'soel', 'soelg', 'soelm', 'soelb', 'soels', 'soelt', 'soelp', 'soelh',
   0xF0 => 'soem', 'soeb', 'soebs', 'soes', 'soess', 'soeng', 'soej', 'soech', 'soek', 'soet', 'soep', 'soeh', 'syo', 'syog', 'syokk', 'syogs',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc2.php b/core/lib/Drupal/Component/Transliteration/data/xc2.php
index e540707e175afc78db5621734fd7aae2012f41e4..76a5738247cdac17923d7ac1736fcb23f5666787 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc2.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc2.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'syon', 'syonj', 'syonh', 'syod', 'syol', 'syolg', 'syolm', 'syolb', 'syols', 'syolt', 'syolp', 'syolh', 'syom', 'syob', 'syobs', 'syos',
   0x10 => 'syoss', 'syong', 'syoj', 'syoch', 'syok', 'syot', 'syop', 'syoh', 'su', 'sug', 'sukk', 'sugs', 'sun', 'sunj', 'sunh', 'sud',
   0x20 => 'sul', 'sulg', 'sulm', 'sulb', 'suls', 'sult', 'sulp', 'sulh', 'sum', 'sub', 'subs', 'sus', 'suss', 'sung', 'suj', 'such',
@@ -22,4 +22,4 @@
   0xD0 => 'suim', 'suib', 'suibs', 'suis', 'suiss', 'suing', 'suij', 'suich', 'suik', 'suit', 'suip', 'suih', 'si', 'sig', 'sikk', 'sigs',
   0xE0 => 'sin', 'sinj', 'sinh', 'sid', 'sil', 'silg', 'silm', 'silb', 'sils', 'silt', 'silp', 'silh', 'sim', 'sib', 'sibs', 'sis',
   0xF0 => 'siss', 'sing', 'sij', 'sich', 'sik', 'sit', 'sip', 'sih', 'ssa', 'ssag', 'ssakk', 'ssags', 'ssan', 'ssanj', 'ssanh', 'ssad',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc3.php b/core/lib/Drupal/Component/Transliteration/data/xc3.php
index 4fd97551ea9f6571dc05feee5717dcc86c300ce2..24c8c2474087004aec6f18922df96e40dcc97b6d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc3.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc3.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ssal', 'ssalg', 'ssalm', 'ssalb', 'ssals', 'ssalt', 'ssalp', 'ssalh', 'ssam', 'ssab', 'ssabs', 'ssas', 'ssass', 'ssang', 'ssaj', 'ssach',
   0x10 => 'ssak', 'ssat', 'ssap', 'ssah', 'ssae', 'ssaeg', 'ssaekk', 'ssaegs', 'ssaen', 'ssaenj', 'ssaenh', 'ssaed', 'ssael', 'ssaelg', 'ssaelm', 'ssaelb',
   0x20 => 'ssaels', 'ssaelt', 'ssaelp', 'ssaelh', 'ssaem', 'ssaeb', 'ssaebs', 'ssaes', 'ssaess', 'ssaeng', 'ssaej', 'ssaech', 'ssaek', 'ssaet', 'ssaep', 'ssaeh',
@@ -22,4 +22,4 @@
   0xD0 => 'ssyess', 'ssyeng', 'ssyej', 'ssyech', 'ssyek', 'ssyet', 'ssyep', 'ssyeh', 'sso', 'ssog', 'ssokk', 'ssogs', 'sson', 'ssonj', 'ssonh', 'ssod',
   0xE0 => 'ssol', 'ssolg', 'ssolm', 'ssolb', 'ssols', 'ssolt', 'ssolp', 'ssolh', 'ssom', 'ssob', 'ssobs', 'ssos', 'ssoss', 'ssong', 'ssoj', 'ssoch',
   0xF0 => 'ssok', 'ssot', 'ssop', 'ssoh', 'sswa', 'sswag', 'sswakk', 'sswags', 'sswan', 'sswanj', 'sswanh', 'sswad', 'sswal', 'sswalg', 'sswalm', 'sswalb',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc4.php b/core/lib/Drupal/Component/Transliteration/data/xc4.php
index 0e9034f32c6d6a5d35f9b2e06c84aabb0668a042..5e0b9704a1e892bfb9b0a0097cb2e5ad2d3f441d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc4.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc4.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'sswals', 'sswalt', 'sswalp', 'sswalh', 'sswam', 'sswab', 'sswabs', 'sswas', 'sswass', 'sswang', 'sswaj', 'sswach', 'sswak', 'sswat', 'sswap', 'sswah',
   0x10 => 'sswae', 'sswaeg', 'sswaekk', 'sswaegs', 'sswaen', 'sswaenj', 'sswaenh', 'sswaed', 'sswael', 'sswaelg', 'sswaelm', 'sswaelb', 'sswaels', 'sswaelt', 'sswaelp', 'sswaelh',
   0x20 => 'sswaem', 'sswaeb', 'sswaebs', 'sswaes', 'sswaess', 'sswaeng', 'sswaej', 'sswaech', 'sswaek', 'sswaet', 'sswaep', 'sswaeh', 'ssoe', 'ssoeg', 'ssoekk', 'ssoegs',
@@ -22,4 +22,4 @@
   0xD0 => 'sswik', 'sswit', 'sswip', 'sswih', 'ssyu', 'ssyug', 'ssyukk', 'ssyugs', 'ssyun', 'ssyunj', 'ssyunh', 'ssyud', 'ssyul', 'ssyulg', 'ssyulm', 'ssyulb',
   0xE0 => 'ssyuls', 'ssyult', 'ssyulp', 'ssyulh', 'ssyum', 'ssyub', 'ssyubs', 'ssyus', 'ssyuss', 'ssyung', 'ssyuj', 'ssyuch', 'ssyuk', 'ssyut', 'ssyup', 'ssyuh',
   0xF0 => 'sseu', 'sseug', 'sseukk', 'sseugs', 'sseun', 'sseunj', 'sseunh', 'sseud', 'sseul', 'sseulg', 'sseulm', 'sseulb', 'sseuls', 'sseult', 'sseulp', 'sseulh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc5.php b/core/lib/Drupal/Component/Transliteration/data/xc5.php
index 21085ce7e135636e5a62c660c380137bca24b093..f679928162657de2cee372b18e514e572f84438c 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc5.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc5.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'sseum', 'sseub', 'sseubs', 'sseus', 'sseuss', 'sseung', 'sseuj', 'sseuch', 'sseuk', 'sseut', 'sseup', 'sseuh', 'ssui', 'ssuig', 'ssuikk', 'ssuigs',
   0x10 => 'ssuin', 'ssuinj', 'ssuinh', 'ssuid', 'ssuil', 'ssuilg', 'ssuilm', 'ssuilb', 'ssuils', 'ssuilt', 'ssuilp', 'ssuilh', 'ssuim', 'ssuib', 'ssuibs', 'ssuis',
   0x20 => 'ssuiss', 'ssuing', 'ssuij', 'ssuich', 'ssuik', 'ssuit', 'ssuip', 'ssuih', 'ssi', 'ssig', 'ssikk', 'ssigs', 'ssin', 'ssinj', 'ssinh', 'ssid',
@@ -22,4 +22,4 @@
   0xD0 => 'e', 'eg', 'ekk', 'egs', 'en', 'enj', 'enh', 'ed', 'el', 'elg', 'elm', 'elb', 'els', 'elt', 'elp', 'elh',
   0xE0 => 'em', 'eb', 'ebs', 'es', 'ess', 'eng', 'ej', 'ech', 'ek', 'et', 'ep', 'eh', 'yeo', 'yeog', 'yeokk', 'yeogs',
   0xF0 => 'yeon', 'yeonj', 'yeonh', 'yeod', 'yeol', 'yeolg', 'yeolm', 'yeolb', 'yeols', 'yeolt', 'yeolp', 'yeolh', 'yeom', 'yeob', 'yeobs', 'yeos',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc6.php b/core/lib/Drupal/Component/Transliteration/data/xc6.php
index 7cd53f29779bce9066b4428bba280117d9fbe3b9..fc2d89605f13c6df2fe7731f9f4f755ce4fe023c 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc6.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc6.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yeoss', 'yeong', 'yeoj', 'yeoch', 'yeok', 'yeot', 'yeop', 'yeoh', 'ye', 'yeg', 'yekk', 'yegs', 'yen', 'yenj', 'yenh', 'yed',
   0x10 => 'yel', 'yelg', 'yelm', 'yelb', 'yels', 'yelt', 'yelp', 'yelh', 'yem', 'yeb', 'yebs', 'yes', 'yess', 'yeng', 'yej', 'yech',
   0x20 => 'yek', 'yet', 'yep', 'yeh', 'o', 'og', 'okk', 'ogs', 'on', 'onj', 'onh', 'od', 'ol', 'olg', 'olm', 'olb',
@@ -22,4 +22,4 @@
   0xD0 => 'won', 'wonj', 'wonh', 'wod', 'wol', 'wolg', 'wolm', 'wolb', 'wols', 'wolt', 'wolp', 'wolh', 'wom', 'wob', 'wobs', 'wos',
   0xE0 => 'woss', 'wong', 'woj', 'woch', 'wok', 'wot', 'wop', 'woh', 'we', 'weg', 'wekk', 'wegs', 'wen', 'wenj', 'wenh', 'wed',
   0xF0 => 'wel', 'welg', 'welm', 'welb', 'wels', 'welt', 'welp', 'welh', 'wem', 'web', 'webs', 'wes', 'wess', 'weng', 'wej', 'wech',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc7.php b/core/lib/Drupal/Component/Transliteration/data/xc7.php
index f362ad40ece8c331b17ea19db75055dec58b2dea..405fd162232b6625660bc47bf27451e6f9c3062d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc7.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc7.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'wek', 'wet', 'wep', 'weh', 'wi', 'wig', 'wikk', 'wigs', 'win', 'winj', 'winh', 'wid', 'wil', 'wilg', 'wilm', 'wilb',
   0x10 => 'wils', 'wilt', 'wilp', 'wilh', 'wim', 'wib', 'wibs', 'wis', 'wiss', 'wing', 'wij', 'wich', 'wik', 'wit', 'wip', 'wih',
   0x20 => 'yu', 'yug', 'yukk', 'yugs', 'yun', 'yunj', 'yunh', 'yud', 'yul', 'yulg', 'yulm', 'yulb', 'yuls', 'yult', 'yulp', 'yulh',
@@ -22,4 +22,4 @@
   0xD0 => 'jyal', 'jyalg', 'jyalm', 'jyalb', 'jyals', 'jyalt', 'jyalp', 'jyalh', 'jyam', 'jyab', 'jyabs', 'jyas', 'jyass', 'jyang', 'jyaj', 'jyach',
   0xE0 => 'jyak', 'jyat', 'jyap', 'jyah', 'jyae', 'jyaeg', 'jyaekk', 'jyaegs', 'jyaen', 'jyaenj', 'jyaenh', 'jyaed', 'jyael', 'jyaelg', 'jyaelm', 'jyaelb',
   0xF0 => 'jyaels', 'jyaelt', 'jyaelp', 'jyaelh', 'jyaem', 'jyaeb', 'jyaebs', 'jyaes', 'jyaess', 'jyaeng', 'jyaej', 'jyaech', 'jyaek', 'jyaet', 'jyaep', 'jyaeh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc8.php b/core/lib/Drupal/Component/Transliteration/data/xc8.php
index 656a0703fd141a994b5f3f60c87cf9669a2629bf..952a1391797efcf90e094b3407c5af160657741b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc8.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc8.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'jeo', 'jeog', 'jeokk', 'jeogs', 'jeon', 'jeonj', 'jeonh', 'jeod', 'jeol', 'jeolg', 'jeolm', 'jeolb', 'jeols', 'jeolt', 'jeolp', 'jeolh',
   0x10 => 'jeom', 'jeob', 'jeobs', 'jeos', 'jeoss', 'jeong', 'jeoj', 'jeoch', 'jeok', 'jeot', 'jeop', 'jeoh', 'je', 'jeg', 'jekk', 'jegs',
   0x20 => 'jen', 'jenj', 'jenh', 'jed', 'jel', 'jelg', 'jelm', 'jelb', 'jels', 'jelt', 'jelp', 'jelh', 'jem', 'jeb', 'jebs', 'jes',
@@ -22,4 +22,4 @@
   0xD0 => 'joels', 'joelt', 'joelp', 'joelh', 'joem', 'joeb', 'joebs', 'joes', 'joess', 'joeng', 'joej', 'joech', 'joek', 'joet', 'joep', 'joeh',
   0xE0 => 'jyo', 'jyog', 'jyokk', 'jyogs', 'jyon', 'jyonj', 'jyonh', 'jyod', 'jyol', 'jyolg', 'jyolm', 'jyolb', 'jyols', 'jyolt', 'jyolp', 'jyolh',
   0xF0 => 'jyom', 'jyob', 'jyobs', 'jyos', 'jyoss', 'jyong', 'jyoj', 'jyoch', 'jyok', 'jyot', 'jyop', 'jyoh', 'ju', 'jug', 'jukk', 'jugs',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xc9.php b/core/lib/Drupal/Component/Transliteration/data/xc9.php
index 5fd5eb5066e8ec2d52718695952721581b24a24d..0d990f77d554210fec666eac240b1693d8ada151 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xc9.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xc9.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'jun', 'junj', 'junh', 'jud', 'jul', 'julg', 'julm', 'julb', 'juls', 'jult', 'julp', 'julh', 'jum', 'jub', 'jubs', 'jus',
   0x10 => 'juss', 'jung', 'juj', 'juch', 'juk', 'jut', 'jup', 'juh', 'jwo', 'jwog', 'jwokk', 'jwogs', 'jwon', 'jwonj', 'jwonh', 'jwod',
   0x20 => 'jwol', 'jwolg', 'jwolm', 'jwolb', 'jwols', 'jwolt', 'jwolp', 'jwolh', 'jwom', 'jwob', 'jwobs', 'jwos', 'jwoss', 'jwong', 'jwoj', 'jwoch',
@@ -22,4 +22,4 @@
   0xD0 => 'jim', 'jib', 'jibs', 'jis', 'jiss', 'jing', 'jij', 'jich', 'jik', 'jit', 'jip', 'jih', 'jja', 'jjag', 'jjakk', 'jjags',
   0xE0 => 'jjan', 'jjanj', 'jjanh', 'jjad', 'jjal', 'jjalg', 'jjalm', 'jjalb', 'jjals', 'jjalt', 'jjalp', 'jjalh', 'jjam', 'jjab', 'jjabs', 'jjas',
   0xF0 => 'jjass', 'jjang', 'jjaj', 'jjach', 'jjak', 'jjat', 'jjap', 'jjah', 'jjae', 'jjaeg', 'jjaekk', 'jjaegs', 'jjaen', 'jjaenj', 'jjaenh', 'jjaed',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xca.php b/core/lib/Drupal/Component/Transliteration/data/xca.php
index 7ebaa755307c50d5241045f1ebb5d12a359b7649..be314ec4fb6b1e74f3bbd3e2ee1a31a3eddc2f9e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xca.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xca.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'jjael', 'jjaelg', 'jjaelm', 'jjaelb', 'jjaels', 'jjaelt', 'jjaelp', 'jjaelh', 'jjaem', 'jjaeb', 'jjaebs', 'jjaes', 'jjaess', 'jjaeng', 'jjaej', 'jjaech',
   0x10 => 'jjaek', 'jjaet', 'jjaep', 'jjaeh', 'jjya', 'jjyag', 'jjyakk', 'jjyags', 'jjyan', 'jjyanj', 'jjyanh', 'jjyad', 'jjyal', 'jjyalg', 'jjyalm', 'jjyalb',
   0x20 => 'jjyals', 'jjyalt', 'jjyalp', 'jjyalh', 'jjyam', 'jjyab', 'jjyabs', 'jjyas', 'jjyass', 'jjyang', 'jjyaj', 'jjyach', 'jjyak', 'jjyat', 'jjyap', 'jjyah',
@@ -22,4 +22,4 @@
   0xD0 => 'jjoss', 'jjong', 'jjoj', 'jjoch', 'jjok', 'jjot', 'jjop', 'jjoh', 'jjwa', 'jjwag', 'jjwakk', 'jjwags', 'jjwan', 'jjwanj', 'jjwanh', 'jjwad',
   0xE0 => 'jjwal', 'jjwalg', 'jjwalm', 'jjwalb', 'jjwals', 'jjwalt', 'jjwalp', 'jjwalh', 'jjwam', 'jjwab', 'jjwabs', 'jjwas', 'jjwass', 'jjwang', 'jjwaj', 'jjwach',
   0xF0 => 'jjwak', 'jjwat', 'jjwap', 'jjwah', 'jjwae', 'jjwaeg', 'jjwaekk', 'jjwaegs', 'jjwaen', 'jjwaenj', 'jjwaenh', 'jjwaed', 'jjwael', 'jjwaelg', 'jjwaelm', 'jjwaelb',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xcb.php b/core/lib/Drupal/Component/Transliteration/data/xcb.php
index cbd291ab0dd2d34174fc3161af12d13f1b025a34..c396fcd3ce21eeffcce18bf7ace8353d99abfc28 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xcb.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xcb.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'jjwaels', 'jjwaelt', 'jjwaelp', 'jjwaelh', 'jjwaem', 'jjwaeb', 'jjwaebs', 'jjwaes', 'jjwaess', 'jjwaeng', 'jjwaej', 'jjwaech', 'jjwaek', 'jjwaet', 'jjwaep', 'jjwaeh',
   0x10 => 'jjoe', 'jjoeg', 'jjoekk', 'jjoegs', 'jjoen', 'jjoenj', 'jjoenh', 'jjoed', 'jjoel', 'jjoelg', 'jjoelm', 'jjoelb', 'jjoels', 'jjoelt', 'jjoelp', 'jjoelh',
   0x20 => 'jjoem', 'jjoeb', 'jjoebs', 'jjoes', 'jjoess', 'jjoeng', 'jjoej', 'jjoech', 'jjoek', 'jjoet', 'jjoep', 'jjoeh', 'jjyo', 'jjyog', 'jjyokk', 'jjyogs',
@@ -22,4 +22,4 @@
   0xD0 => 'jjyuk', 'jjyut', 'jjyup', 'jjyuh', 'jjeu', 'jjeug', 'jjeukk', 'jjeugs', 'jjeun', 'jjeunj', 'jjeunh', 'jjeud', 'jjeul', 'jjeulg', 'jjeulm', 'jjeulb',
   0xE0 => 'jjeuls', 'jjeult', 'jjeulp', 'jjeulh', 'jjeum', 'jjeub', 'jjeubs', 'jjeus', 'jjeuss', 'jjeung', 'jjeuj', 'jjeuch', 'jjeuk', 'jjeut', 'jjeup', 'jjeuh',
   0xF0 => 'jjui', 'jjuig', 'jjuikk', 'jjuigs', 'jjuin', 'jjuinj', 'jjuinh', 'jjuid', 'jjuil', 'jjuilg', 'jjuilm', 'jjuilb', 'jjuils', 'jjuilt', 'jjuilp', 'jjuilh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xcc.php b/core/lib/Drupal/Component/Transliteration/data/xcc.php
index d543b26fa27d944422239daa6f400e63e6ffb29b..4dc25f26ecb25f2a5c7b0b1c3cac680da54df5aa 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xcc.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xcc.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'jjuim', 'jjuib', 'jjuibs', 'jjuis', 'jjuiss', 'jjuing', 'jjuij', 'jjuich', 'jjuik', 'jjuit', 'jjuip', 'jjuih', 'jji', 'jjig', 'jjikk', 'jjigs',
   0x10 => 'jjin', 'jjinj', 'jjinh', 'jjid', 'jjil', 'jjilg', 'jjilm', 'jjilb', 'jjils', 'jjilt', 'jjilp', 'jjilh', 'jjim', 'jjib', 'jjibs', 'jjis',
   0x20 => 'jjiss', 'jjing', 'jjij', 'jjich', 'jjik', 'jjit', 'jjip', 'jjih', 'cha', 'chag', 'chakk', 'chags', 'chan', 'chanj', 'chanh', 'chad',
@@ -22,4 +22,4 @@
   0xD0 => 'chyeo', 'chyeog', 'chyeokk', 'chyeogs', 'chyeon', 'chyeonj', 'chyeonh', 'chyeod', 'chyeol', 'chyeolg', 'chyeolm', 'chyeolb', 'chyeols', 'chyeolt', 'chyeolp', 'chyeolh',
   0xE0 => 'chyeom', 'chyeob', 'chyeobs', 'chyeos', 'chyeoss', 'chyeong', 'chyeoj', 'chyeoch', 'chyeok', 'chyeot', 'chyeop', 'chyeoh', 'chye', 'chyeg', 'chyekk', 'chyegs',
   0xF0 => 'chyen', 'chyenj', 'chyenh', 'chyed', 'chyel', 'chyelg', 'chyelm', 'chyelb', 'chyels', 'chyelt', 'chyelp', 'chyelh', 'chyem', 'chyeb', 'chyebs', 'chyes',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xcd.php b/core/lib/Drupal/Component/Transliteration/data/xcd.php
index 6f730e57ea768e46899ee6b2bf153bda9440728b..21f2ed7f9b4d798f7a7493a4ec9192107a6af8b1 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xcd.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xcd.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'chyess', 'chyeng', 'chyej', 'chyech', 'chyek', 'chyet', 'chyep', 'chyeh', 'cho', 'chog', 'chokk', 'chogs', 'chon', 'chonj', 'chonh', 'chod',
   0x10 => 'chol', 'cholg', 'cholm', 'cholb', 'chols', 'cholt', 'cholp', 'cholh', 'chom', 'chob', 'chobs', 'chos', 'choss', 'chong', 'choj', 'choch',
   0x20 => 'chok', 'chot', 'chop', 'choh', 'chwa', 'chwag', 'chwakk', 'chwags', 'chwan', 'chwanj', 'chwanh', 'chwad', 'chwal', 'chwalg', 'chwalm', 'chwalb',
@@ -22,4 +22,4 @@
   0xD0 => 'chwen', 'chwenj', 'chwenh', 'chwed', 'chwel', 'chwelg', 'chwelm', 'chwelb', 'chwels', 'chwelt', 'chwelp', 'chwelh', 'chwem', 'chweb', 'chwebs', 'chwes',
   0xE0 => 'chwess', 'chweng', 'chwej', 'chwech', 'chwek', 'chwet', 'chwep', 'chweh', 'chwi', 'chwig', 'chwikk', 'chwigs', 'chwin', 'chwinj', 'chwinh', 'chwid',
   0xF0 => 'chwil', 'chwilg', 'chwilm', 'chwilb', 'chwils', 'chwilt', 'chwilp', 'chwilh', 'chwim', 'chwib', 'chwibs', 'chwis', 'chwiss', 'chwing', 'chwij', 'chwich',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xce.php b/core/lib/Drupal/Component/Transliteration/data/xce.php
index 099354e8723aa34b2875511218ce54c20e471579..08dff787c2952dfcabcdbe152159b2328cfd593b 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xce.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xce.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'chwik', 'chwit', 'chwip', 'chwih', 'chyu', 'chyug', 'chyukk', 'chyugs', 'chyun', 'chyunj', 'chyunh', 'chyud', 'chyul', 'chyulg', 'chyulm', 'chyulb',
   0x10 => 'chyuls', 'chyult', 'chyulp', 'chyulh', 'chyum', 'chyub', 'chyubs', 'chyus', 'chyuss', 'chyung', 'chyuj', 'chyuch', 'chyuk', 'chyut', 'chyup', 'chyuh',
   0x20 => 'cheu', 'cheug', 'cheukk', 'cheugs', 'cheun', 'cheunj', 'cheunh', 'cheud', 'cheul', 'cheulg', 'cheulm', 'cheulb', 'cheuls', 'cheult', 'cheulp', 'cheulh',
@@ -22,4 +22,4 @@
   0xD0 => 'kyael', 'kyaelg', 'kyaelm', 'kyaelb', 'kyaels', 'kyaelt', 'kyaelp', 'kyaelh', 'kyaem', 'kyaeb', 'kyaebs', 'kyaes', 'kyaess', 'kyaeng', 'kyaej', 'kyaech',
   0xE0 => 'kyaek', 'kyaet', 'kyaep', 'kyaeh', 'keo', 'keog', 'keokk', 'keogs', 'keon', 'keonj', 'keonh', 'keod', 'keol', 'keolg', 'keolm', 'keolb',
   0xF0 => 'keols', 'keolt', 'keolp', 'keolh', 'keom', 'keob', 'keobs', 'keos', 'keoss', 'keong', 'keoj', 'keoch', 'keok', 'keot', 'keop', 'keoh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xcf.php b/core/lib/Drupal/Component/Transliteration/data/xcf.php
index 434113f8f054f30448f253188c17ee619f7176f0..2a0a946cd9e8a7888ec0b25bd028587eebb40227 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xcf.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xcf.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ke', 'keg', 'kekk', 'kegs', 'ken', 'kenj', 'kenh', 'ked', 'kel', 'kelg', 'kelm', 'kelb', 'kels', 'kelt', 'kelp', 'kelh',
   0x10 => 'kem', 'keb', 'kebs', 'kes', 'kess', 'keng', 'kej', 'kech', 'kek', 'ket', 'kep', 'keh', 'kyeo', 'kyeog', 'kyeokk', 'kyeogs',
   0x20 => 'kyeon', 'kyeonj', 'kyeonh', 'kyeod', 'kyeol', 'kyeolg', 'kyeolm', 'kyeolb', 'kyeols', 'kyeolt', 'kyeolp', 'kyeolh', 'kyeom', 'kyeob', 'kyeobs', 'kyeos',
@@ -22,4 +22,4 @@
   0xD0 => 'kyols', 'kyolt', 'kyolp', 'kyolh', 'kyom', 'kyob', 'kyobs', 'kyos', 'kyoss', 'kyong', 'kyoj', 'kyoch', 'kyok', 'kyot', 'kyop', 'kyoh',
   0xE0 => 'ku', 'kug', 'kukk', 'kugs', 'kun', 'kunj', 'kunh', 'kud', 'kul', 'kulg', 'kulm', 'kulb', 'kuls', 'kult', 'kulp', 'kulh',
   0xF0 => 'kum', 'kub', 'kubs', 'kus', 'kuss', 'kung', 'kuj', 'kuch', 'kuk', 'kut', 'kup', 'kuh', 'kwo', 'kwog', 'kwokk', 'kwogs',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xd0.php b/core/lib/Drupal/Component/Transliteration/data/xd0.php
index 848b49c7da61c5de126d79f80a46462b4cae8b1f..3c94c68351200aef6e9322de453806d513234c9d 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xd0.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xd0.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'kwon', 'kwonj', 'kwonh', 'kwod', 'kwol', 'kwolg', 'kwolm', 'kwolb', 'kwols', 'kwolt', 'kwolp', 'kwolh', 'kwom', 'kwob', 'kwobs', 'kwos',
   0x10 => 'kwoss', 'kwong', 'kwoj', 'kwoch', 'kwok', 'kwot', 'kwop', 'kwoh', 'kwe', 'kweg', 'kwekk', 'kwegs', 'kwen', 'kwenj', 'kwenh', 'kwed',
   0x20 => 'kwel', 'kwelg', 'kwelm', 'kwelb', 'kwels', 'kwelt', 'kwelp', 'kwelh', 'kwem', 'kweb', 'kwebs', 'kwes', 'kwess', 'kweng', 'kwej', 'kwech',
@@ -22,4 +22,4 @@
   0xD0 => 'tam', 'tab', 'tabs', 'tas', 'tass', 'tang', 'taj', 'tach', 'tak', 'tat', 'tap', 'tah', 'tae', 'taeg', 'taekk', 'taegs',
   0xE0 => 'taen', 'taenj', 'taenh', 'taed', 'tael', 'taelg', 'taelm', 'taelb', 'taels', 'taelt', 'taelp', 'taelh', 'taem', 'taeb', 'taebs', 'taes',
   0xF0 => 'taess', 'taeng', 'taej', 'taech', 'taek', 'taet', 'taep', 'taeh', 'tya', 'tyag', 'tyakk', 'tyags', 'tyan', 'tyanj', 'tyanh', 'tyad',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xd1.php b/core/lib/Drupal/Component/Transliteration/data/xd1.php
index c6504f4c86907afb422056cec01ca642395919a9..418f2070d7e4208907252cbfb4da796a4abaa9ab 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xd1.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xd1.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'tyal', 'tyalg', 'tyalm', 'tyalb', 'tyals', 'tyalt', 'tyalp', 'tyalh', 'tyam', 'tyab', 'tyabs', 'tyas', 'tyass', 'tyang', 'tyaj', 'tyach',
   0x10 => 'tyak', 'tyat', 'tyap', 'tyah', 'tyae', 'tyaeg', 'tyaekk', 'tyaegs', 'tyaen', 'tyaenj', 'tyaenh', 'tyaed', 'tyael', 'tyaelg', 'tyaelm', 'tyaelb',
   0x20 => 'tyaels', 'tyaelt', 'tyaelp', 'tyaelh', 'tyaem', 'tyaeb', 'tyaebs', 'tyaes', 'tyaess', 'tyaeng', 'tyaej', 'tyaech', 'tyaek', 'tyaet', 'tyaep', 'tyaeh',
@@ -22,4 +22,4 @@
   0xD0 => 'twass', 'twang', 'twaj', 'twach', 'twak', 'twat', 'twap', 'twah', 'twae', 'twaeg', 'twaekk', 'twaegs', 'twaen', 'twaenj', 'twaenh', 'twaed',
   0xE0 => 'twael', 'twaelg', 'twaelm', 'twaelb', 'twaels', 'twaelt', 'twaelp', 'twaelh', 'twaem', 'twaeb', 'twaebs', 'twaes', 'twaess', 'twaeng', 'twaej', 'twaech',
   0xF0 => 'twaek', 'twaet', 'twaep', 'twaeh', 'toe', 'toeg', 'toekk', 'toegs', 'toen', 'toenj', 'toenh', 'toed', 'toel', 'toelg', 'toelm', 'toelb',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xd2.php b/core/lib/Drupal/Component/Transliteration/data/xd2.php
index 741c229f7d18a747de7279120b12a65e579e5c95..d749276f84bdbdfcd0c17af7fb040eb23a623421 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xd2.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xd2.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'toels', 'toelt', 'toelp', 'toelh', 'toem', 'toeb', 'toebs', 'toes', 'toess', 'toeng', 'toej', 'toech', 'toek', 'toet', 'toep', 'toeh',
   0x10 => 'tyo', 'tyog', 'tyokk', 'tyogs', 'tyon', 'tyonj', 'tyonh', 'tyod', 'tyol', 'tyolg', 'tyolm', 'tyolb', 'tyols', 'tyolt', 'tyolp', 'tyolh',
   0x20 => 'tyom', 'tyob', 'tyobs', 'tyos', 'tyoss', 'tyong', 'tyoj', 'tyoch', 'tyok', 'tyot', 'tyop', 'tyoh', 'tu', 'tug', 'tukk', 'tugs',
@@ -22,4 +22,4 @@
   0xD0 => 'teuk', 'teut', 'teup', 'teuh', 'tui', 'tuig', 'tuikk', 'tuigs', 'tuin', 'tuinj', 'tuinh', 'tuid', 'tuil', 'tuilg', 'tuilm', 'tuilb',
   0xE0 => 'tuils', 'tuilt', 'tuilp', 'tuilh', 'tuim', 'tuib', 'tuibs', 'tuis', 'tuiss', 'tuing', 'tuij', 'tuich', 'tuik', 'tuit', 'tuip', 'tuih',
   0xF0 => 'ti', 'tig', 'tikk', 'tigs', 'tin', 'tinj', 'tinh', 'tid', 'til', 'tilg', 'tilm', 'tilb', 'tils', 'tilt', 'tilp', 'tilh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xd3.php b/core/lib/Drupal/Component/Transliteration/data/xd3.php
index 54aab18ed2bfe4fb77bf11640d97fffb4a44e0a6..d56ee58a2c23417bfd3efb15767c0fbf6cbb183e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xd3.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xd3.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'tim', 'tib', 'tibs', 'tis', 'tiss', 'ting', 'tij', 'tich', 'tik', 'tit', 'tip', 'tih', 'pa', 'pag', 'pakk', 'pags',
   0x10 => 'pan', 'panj', 'panh', 'pad', 'pal', 'palg', 'palm', 'palb', 'pals', 'palt', 'palp', 'palh', 'pam', 'pab', 'pabs', 'pas',
   0x20 => 'pass', 'pang', 'paj', 'pach', 'pak', 'pat', 'pap', 'pah', 'pae', 'paeg', 'paekk', 'paegs', 'paen', 'paenj', 'paenh', 'paed',
@@ -22,4 +22,4 @@
   0xD0 => 'pye', 'pyeg', 'pyekk', 'pyegs', 'pyen', 'pyenj', 'pyenh', 'pyed', 'pyel', 'pyelg', 'pyelm', 'pyelb', 'pyels', 'pyelt', 'pyelp', 'pyelh',
   0xE0 => 'pyem', 'pyeb', 'pyebs', 'pyes', 'pyess', 'pyeng', 'pyej', 'pyech', 'pyek', 'pyet', 'pyep', 'pyeh', 'po', 'pog', 'pokk', 'pogs',
   0xF0 => 'pon', 'ponj', 'ponh', 'pod', 'pol', 'polg', 'polm', 'polb', 'pols', 'polt', 'polp', 'polh', 'pom', 'pob', 'pobs', 'pos',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xd4.php b/core/lib/Drupal/Component/Transliteration/data/xd4.php
index 0df64106af3a9340fa8b3057f811ab7c5854a888..dcbf3ecbab6aaa6d083fe819a5bddfd953ba424e 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xd4.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xd4.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'poss', 'pong', 'poj', 'poch', 'pok', 'pot', 'pop', 'poh', 'pwa', 'pwag', 'pwakk', 'pwags', 'pwan', 'pwanj', 'pwanh', 'pwad',
   0x10 => 'pwal', 'pwalg', 'pwalm', 'pwalb', 'pwals', 'pwalt', 'pwalp', 'pwalh', 'pwam', 'pwab', 'pwabs', 'pwas', 'pwass', 'pwang', 'pwaj', 'pwach',
   0x20 => 'pwak', 'pwat', 'pwap', 'pwah', 'pwae', 'pwaeg', 'pwaekk', 'pwaegs', 'pwaen', 'pwaenj', 'pwaenh', 'pwaed', 'pwael', 'pwaelg', 'pwaelm', 'pwaelb',
@@ -22,4 +22,4 @@
   0xD0 => 'pwin', 'pwinj', 'pwinh', 'pwid', 'pwil', 'pwilg', 'pwilm', 'pwilb', 'pwils', 'pwilt', 'pwilp', 'pwilh', 'pwim', 'pwib', 'pwibs', 'pwis',
   0xE0 => 'pwiss', 'pwing', 'pwij', 'pwich', 'pwik', 'pwit', 'pwip', 'pwih', 'pyu', 'pyug', 'pyukk', 'pyugs', 'pyun', 'pyunj', 'pyunh', 'pyud',
   0xF0 => 'pyul', 'pyulg', 'pyulm', 'pyulb', 'pyuls', 'pyult', 'pyulp', 'pyulh', 'pyum', 'pyub', 'pyubs', 'pyus', 'pyuss', 'pyung', 'pyuj', 'pyuch',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xd5.php b/core/lib/Drupal/Component/Transliteration/data/xd5.php
index 2dbeadaae438f6416719fda628d76140e63e8052..0b3efb145c0eab1965417375d4a001016a36ad60 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xd5.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xd5.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'pyuk', 'pyut', 'pyup', 'pyuh', 'peu', 'peug', 'peukk', 'peugs', 'peun', 'peunj', 'peunh', 'peud', 'peul', 'peulg', 'peulm', 'peulb',
   0x10 => 'peuls', 'peult', 'peulp', 'peulh', 'peum', 'peub', 'peubs', 'peus', 'peuss', 'peung', 'peuj', 'peuch', 'peuk', 'peut', 'peup', 'peuh',
   0x20 => 'pui', 'puig', 'puikk', 'puigs', 'puin', 'puinj', 'puinh', 'puid', 'puil', 'puilg', 'puilm', 'puilb', 'puils', 'puilt', 'puilp', 'puilh',
@@ -22,4 +22,4 @@
   0xD0 => 'heol', 'heolg', 'heolm', 'heolb', 'heols', 'heolt', 'heolp', 'heolh', 'heom', 'heob', 'heobs', 'heos', 'heoss', 'heong', 'heoj', 'heoch',
   0xE0 => 'heok', 'heot', 'heop', 'heoh', 'he', 'heg', 'hekk', 'hegs', 'hen', 'henj', 'henh', 'hed', 'hel', 'helg', 'helm', 'helb',
   0xF0 => 'hels', 'helt', 'help', 'helh', 'hem', 'heb', 'hebs', 'hes', 'hess', 'heng', 'hej', 'hech', 'hek', 'het', 'hep', 'heh',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xd6.php b/core/lib/Drupal/Component/Transliteration/data/xd6.php
index e86914f08357d1eb1d90ade5bb71a4f294e77229..ae1dcf781f75c37d25286a20d51e88c848f769f2 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xd6.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xd6.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'hyeo', 'hyeog', 'hyeokk', 'hyeogs', 'hyeon', 'hyeonj', 'hyeonh', 'hyeod', 'hyeol', 'hyeolg', 'hyeolm', 'hyeolb', 'hyeols', 'hyeolt', 'hyeolp', 'hyeolh',
   0x10 => 'hyeom', 'hyeob', 'hyeobs', 'hyeos', 'hyeoss', 'hyeong', 'hyeoj', 'hyeoch', 'hyeok', 'hyeot', 'hyeop', 'hyeoh', 'hye', 'hyeg', 'hyekk', 'hyegs',
   0x20 => 'hyen', 'hyenj', 'hyenh', 'hyed', 'hyel', 'hyelg', 'hyelm', 'hyelb', 'hyels', 'hyelt', 'hyelp', 'hyelh', 'hyem', 'hyeb', 'hyebs', 'hyes',
@@ -22,4 +22,4 @@
   0xD0 => 'huls', 'hult', 'hulp', 'hulh', 'hum', 'hub', 'hubs', 'hus', 'huss', 'hung', 'huj', 'huch', 'huk', 'hut', 'hup', 'huh',
   0xE0 => 'hwo', 'hwog', 'hwokk', 'hwogs', 'hwon', 'hwonj', 'hwonh', 'hwod', 'hwol', 'hwolg', 'hwolm', 'hwolb', 'hwols', 'hwolt', 'hwolp', 'hwolh',
   0xF0 => 'hwom', 'hwob', 'hwobs', 'hwos', 'hwoss', 'hwong', 'hwoj', 'hwoch', 'hwok', 'hwot', 'hwop', 'hwoh', 'hwe', 'hweg', 'hwekk', 'hwegs',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xd7.php b/core/lib/Drupal/Component/Transliteration/data/xd7.php
index af74c89b6320579873ed3d9306018107e9b76fb0..c0f75b54c590116762134d6f09384ef3eca36c16 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xd7.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xd7.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'hwen', 'hwenj', 'hwenh', 'hwed', 'hwel', 'hwelg', 'hwelm', 'hwelb', 'hwels', 'hwelt', 'hwelp', 'hwelh', 'hwem', 'hweb', 'hwebs', 'hwes',
   0x10 => 'hwess', 'hweng', 'hwej', 'hwech', 'hwek', 'hwet', 'hwep', 'hweh', 'hwi', 'hwig', 'hwikk', 'hwigs', 'hwin', 'hwinj', 'hwinh', 'hwid',
   0x20 => 'hwil', 'hwilg', 'hwilm', 'hwilb', 'hwils', 'hwilt', 'hwilp', 'hwilh', 'hwim', 'hwib', 'hwibs', 'hwis', 'hwiss', 'hwing', 'hwij', 'hwich',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xf9.php b/core/lib/Drupal/Component/Transliteration/data/xf9.php
index efc84995a2005325aa6562c95028e4a9d6784f5b..29eaa3bf679bc52011f2e3013729f693ecd11319 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xf9.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xf9.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'qi', 'geng', 'che', 'jia', 'hua', 'chuan', 'ju', 'gui', 'gui', 'qi', 'jin', 'la', 'nai', 'lan', 'lai', 'luo',
   0x10 => 'luo', 'luo', 'luo', 'luo', 'le', 'luo', 'lao', 'luo', 'luo', 'lao', 'luo', 'luan', 'luan', 'lan', 'lan', 'lan',
   0x20 => 'luan', 'lan', 'lan', 'lan', 'lan', 'la', 'la', 'la', 'lang', 'lang', 'lang', 'lang', 'lang', 'lai', 'leng', 'lao',
@@ -22,4 +22,4 @@
   0xD0 => 'lei', 'liu', 'lu', 'lu', 'lun', 'lun', 'lun', 'lun', 'lu', 'li', 'li', 'lu', 'long', 'li', 'li', 'lu',
   0xE0 => 'yi', 'li', 'li', 'ni', 'li', 'li', 'li', 'li', 'li', 'li', 'li', 'ni', 'ni', 'lin', 'lin', 'lin',
   0xF0 => 'lin', 'lin', 'lin', 'lin', 'lin', 'lin', 'lin', 'li', 'li', 'li', 'zhuang', 'zhi', 'shi', 'shen', 'cha', 'ci',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xfa.php b/core/lib/Drupal/Component/Transliteration/data/xfa.php
index 7ba4ae8c0caf5d17c26ffbad13b285d14807ea37..d5b92f636b092c10813518a246cd5e83e32628f7 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xfa.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xfa.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'qie', 'du', 'ta', 'tang', 'zhai', 'dong', 'bao', 'fu', 'xing', 'jiang', 'jian', 'kuo', 'wu', 'hu', NULL, NULL,
   0x10 => 'zhong', NULL, 'qing', NULL, NULL, 'xi', 'zhu', 'yi', 'li', 'shen', 'xiang', 'fu', 'jing', 'jing', 'yu', NULL,
   0x20 => 'qiu', NULL, 'zhu', NULL, NULL, 'yi', 'dou', NULL, NULL, NULL, 'fan', 'si', 'guan', 'he', NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, 'he', 'xie', 'jie', NULL, 'qian', 'beng', 'e', 'pang', NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xfb.php b/core/lib/Drupal/Component/Transliteration/data/xfb.php
index 7dd47aee80e7b83f0c3b7479f2e62c37f80447c0..aa734cd7bbc38f77ea7b6f27a5bcba9640393427 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xfb.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xfb.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'ff', 'fi', 'fl', 'ffi', 'ffl', 'st', 'st', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => NULL, NULL, NULL, 'mn', 'me', 'mi', 'vn', 'mkh', NULL, NULL, NULL, NULL, NULL, 'y', '', 'yy',
   0x20 => '`', '', 'd', 'h', 'k', 'l', 'm', 'r', 't', '+', 's', 's', 's', 's', 'a', 'a',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, 'ng', 'ng', 'ng', 'ng', '', '', '', '', '', '', '', 'v', 'v',
   0xE0 => '', '', '', '', '', '', '', '', 'y', 'y', 'ya', 'ya', '', '', 'yw', 'yw',
   0xF0 => '', '', '', '', '', '', '', '', '', 'yy', 'yy', 'yy', 'y', 'y', 'y', 'y',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xfc.php b/core/lib/Drupal/Component/Transliteration/data/xfc.php
index 959ef1e7958798665752c32249190e9b416d69b3..aac2f66cee6102920a0db6b28608210f87f89b34 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xfc.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xfc.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'yj', 'yh', 'ym', 'yy', 'yy', 'bj', 'bh', 'bkh', 'bm', 'by', 'by', 'tj', 'th', 'tkh', 'tm', 'ty',
   0x10 => 'ty', 'thj', 'thm', 'thy', 'thy', 'jh', 'jm', 'hj', 'hm', 'khj', 'khh', 'khm', 'sj', 'sh', 'skh', 'sm',
   0x20 => 'sh', 'sm', 'dj', 'dh', 'dkh', 'dm', 'th', 'tm', 'zm', '', '', 'ghj', 'ghm', 'fj', 'fh', 'fkh',
@@ -22,4 +22,4 @@
   0xD0 => 'mkh', 'mm', 'nj', 'nh', 'nkh', 'nm', 'nh', 'hj', 'hm', 'h', 'yj', 'yh', 'ykh', 'ym', 'yh', 'ym',
   0xE0 => 'yh', 'bm', 'bh', 'tm', 'th', 'thm', 'thh', 'sm', 'sh', 'shm', 'shh', 'kl', 'km', 'lm', 'nm', 'nh',
   0xF0 => 'ym', 'yh', 'a', 'u', 'i', 'ty', 'ty', '', '', 'ghy', 'ghy', 'sy', 'sy', 'shy', 'shy', 'hy',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xfd.php b/core/lib/Drupal/Component/Transliteration/data/xfd.php
index 26372c4831a674fbb2b98d7bd5bfb66da09a9179..a970732993a459e0f46f2dc373fc0c04b9df25cc 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xfd.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xfd.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => 'hy', 'jy', 'jy', 'khy', 'khy', 'sy', 'sy', 'dy', 'dy', 'shj', 'shh', 'shkh', 'shm', 'shr', 'sr', 'sr',
   0x10 => 'dr', 'ty', 'ty', '', '', 'ghy', 'ghy', 'sy', 'sy', 'shy', 'shy', 'hy', 'hy', 'jy', 'jy', 'khy',
   0x20 => 'khy', 'sy', 'sy', 'dy', 'dy', 'shj', 'shh', 'shkh', 'shm', 'shr', 'sr', 'sr', 'dr', 'shj', 'shh', 'shkh',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xE0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0xF0 => '', '', 'allh', 'akbr', 'mhmd', '', 'rswl', '', 'wslm', 'sly', '', 'jl jlalh', 'ryal', NULL, NULL, NULL,
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xfe.php b/core/lib/Drupal/Component/Transliteration/data/xfe.php
index c53867bd48f37bc584d05a0783f5896cfe8ac0b4..d05402004bf25d074341dd3cc7b39eccc337ce50 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xfe.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xfe.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   0x10 => ',', ',', '.', ':', ';', '!', '?', NULL, NULL, '...', NULL, NULL, NULL, NULL, NULL, NULL,
   0x20 => '', '', '', '~', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -22,4 +22,4 @@
   0xD0 => 'gh', 'f', 'f', 'f', 'f', 'q', 'q', 'q', 'q', 'k', 'k', 'k', 'k', 'l', 'l', 'l',
   0xE0 => 'l', 'm', 'm', 'm', 'm', 'n', 'n', 'n', 'n', 'h', 'h', 'h', 'h', 'w', 'w', 'y',
   0xF0 => 'y', 'y', 'y', 'y', 'y', 'la', 'la', 'la', 'la', 'la', 'la', 'la', 'la', NULL, NULL, '',
-);
+];
diff --git a/core/lib/Drupal/Component/Transliteration/data/xff.php b/core/lib/Drupal/Component/Transliteration/data/xff.php
index 808529806012f4a03c5a779ad7e685c0f4b29052..3f669bd23e9cb9589b44c8ba9af49d6dc677b7ce 100644
--- a/core/lib/Drupal/Component/Transliteration/data/xff.php
+++ b/core/lib/Drupal/Component/Transliteration/data/xff.php
@@ -5,7 +5,7 @@
  * Generic transliteration data for the PhpTransliteration class.
  */
 
-$base = array(
+$base = [
   0x00 => NULL, '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/',
   0x10 => '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?',
   0x20 => '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
@@ -22,4 +22,4 @@
   0xD0 => NULL, NULL, 'yo', 'u', 'wo', 'we', 'wi', 'yu', NULL, NULL, 'eu', 'ui', 'i', NULL, NULL, NULL,
   0xE0 => '/C', 'PS', '!', '-', '|', 'Y=', 'W=', NULL, '|', '-', '|', '-', '|', '#', 'O', NULL,
   0xF0 => NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, '{', '|', '}', '', '', '', '',
-);
+];
diff --git a/core/lib/Drupal/Component/Utility/ArgumentsResolver.php b/core/lib/Drupal/Component/Utility/ArgumentsResolver.php
index e04cc353af30ecf9f266fe4531a9184b16fe2284..0bd53b214e6cde38c05278b8f1f9b65da0d5a79d 100644
--- a/core/lib/Drupal/Component/Utility/ArgumentsResolver.php
+++ b/core/lib/Drupal/Component/Utility/ArgumentsResolver.php
@@ -49,7 +49,7 @@ public function __construct(array $scalars, array $objects, array $wildcards) {
    * {@inheritdoc}
    */
   public function getArguments(callable $callable) {
-    $arguments = array();
+    $arguments = [];
     foreach ($this->getReflector($callable)->getParameters() as $parameter) {
       $arguments[] = $this->getArgument($parameter);
     }
diff --git a/core/lib/Drupal/Component/Utility/Color.php b/core/lib/Drupal/Component/Utility/Color.php
index d53261ca6c15ce41bdba1b3a03bdda631ecbe352..aa296e94bece57f60a8366f42577822f7b5b0b0d 100644
--- a/core/lib/Drupal/Component/Utility/Color.php
+++ b/core/lib/Drupal/Component/Utility/Color.php
@@ -56,11 +56,11 @@ public static function hexToRgb($hex) {
 
     $c = hexdec($hex);
 
-    return array(
+    return [
       'red' => $c >> 16 & 0xFF,
       'green' => $c >> 8 & 0xFF,
       'blue' => $c & 0xFF,
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Component/Utility/DiffArray.php b/core/lib/Drupal/Component/Utility/DiffArray.php
index 719049e305d3ea0ca77cfec18ee3b6ceaf2d4f58..825648eb7a3a5244dfefdc38ac7cabbda4801afb 100644
--- a/core/lib/Drupal/Component/Utility/DiffArray.php
+++ b/core/lib/Drupal/Component/Utility/DiffArray.php
@@ -25,7 +25,7 @@ class DiffArray {
    *   in array2.
    */
   public static function diffAssocRecursive(array $array1, array $array2) {
-    $difference = array();
+    $difference = [];
 
     foreach ($array1 as $key => $value) {
       if (is_array($value)) {
diff --git a/core/lib/Drupal/Component/Utility/Html.php b/core/lib/Drupal/Component/Utility/Html.php
index 5456cfaaf32f421ce1f69af5ccc63d83347e056d..75bb62f806c22d7783b9d30f472f25db2f874374 100644
--- a/core/lib/Drupal/Component/Utility/Html.php
+++ b/core/lib/Drupal/Component/Utility/Html.php
@@ -14,7 +14,7 @@ class Html {
    *
    * @var array
    */
-  protected static $classes = array();
+  protected static $classes = [];
 
   /**
    * An array of the initial IDs used in one request.
@@ -89,13 +89,13 @@ public static function getClass($class) {
    * @return string
    *   The cleaned identifier.
    */
-  public static function cleanCssIdentifier($identifier, array $filter = array(
+  public static function cleanCssIdentifier($identifier, array $filter = [
     ' ' => '-',
     '_' => '-',
     '/' => '-',
     '[' => '-',
     ']' => '',
-  )) {
+  ]) {
     // We could also use strtr() here but its much slower than str_replace(). In
     // order to keep '__' to stay '__' we first replace it with a different
     // placeholder after checking that it is not defined as a filter.
@@ -120,10 +120,10 @@ public static function cleanCssIdentifier($identifier, array $filter = array(
     // We strip out any character not in the above list.
     $identifier = preg_replace('/[^\x{002D}\x{0030}-\x{0039}\x{0041}-\x{005A}\x{005F}\x{0061}-\x{007A}\x{00A1}-\x{FFFF}]/u', '', $identifier);
     // Identifiers cannot start with a digit, two hyphens, or a hyphen followed by a digit.
-    $identifier = preg_replace(array(
+    $identifier = preg_replace([
       '/^[0-9]/',
       '/^(-[0-9])|^(--)/'
-    ), array('_', '__'), $identifier);
+    ], ['_', '__'], $identifier);
     return $identifier;
   }
 
@@ -176,7 +176,7 @@ public static function getUniqueId($id) {
     // @todo Remove all that code once we switch over to random IDs only,
     // see https://www.drupal.org/node/1090592.
     if (!isset(static::$seenIdsInit)) {
-      static::$seenIdsInit = array();
+      static::$seenIdsInit = [];
     }
     if (!isset(static::$seenIds)) {
       static::$seenIds = static::$seenIdsInit;
@@ -279,7 +279,7 @@ public static function load($html) {
     // PHP's \DOMDocument serialization adds extra whitespace when the markup
     // of the wrapping document contains newlines, so ensure we remove all
     // newlines before injecting the actual HTML body to be processed.
-    $document = strtr($document, array("\n" => '', '!html' => $html));
+    $document = strtr($document, ["\n" => '', '!html' => $html]);
 
     $dom = new \DOMDocument();
     // Ignore warnings during HTML soup loading.
diff --git a/core/lib/Drupal/Component/Utility/NestedArray.php b/core/lib/Drupal/Component/Utility/NestedArray.php
index 0b7cf4fa59e9379c976a946ae9a72909a3743fb2..c11d6a65821fc66e5ceeaf5e973845eaa7604819 100644
--- a/core/lib/Drupal/Component/Utility/NestedArray.php
+++ b/core/lib/Drupal/Component/Utility/NestedArray.php
@@ -150,7 +150,7 @@ public static function setValue(array &$array, array $parents, $value, $force =
       // PHP auto-creates container arrays and NULL entries without error if $ref
       // is NULL, but throws an error if $ref is set, but not an array.
       if ($force && isset($ref) && !is_array($ref)) {
-        $ref = array();
+        $ref = [];
       }
       $ref = &$ref[$parent];
     }
@@ -322,7 +322,7 @@ public static function mergeDeep() {
    * @see NestedArray::mergeDeep()
    */
   public static function mergeDeepArray(array $arrays, $preserve_integer_keys = FALSE) {
-    $result = array();
+    $result = [];
     foreach ($arrays as $array) {
       foreach ($array as $key => $value) {
         // Renumber integer keys as array_merge_recursive() does unless
@@ -333,7 +333,7 @@ public static function mergeDeepArray(array $arrays, $preserve_integer_keys = FA
         }
         // Recurse when both values are arrays.
         elseif (isset($result[$key]) && is_array($result[$key]) && is_array($value)) {
-          $result[$key] = self::mergeDeepArray(array($result[$key], $value), $preserve_integer_keys);
+          $result[$key] = self::mergeDeepArray([$result[$key], $value], $preserve_integer_keys);
         }
         // Otherwise, use the latter value, overriding any previous value.
         else {
diff --git a/core/lib/Drupal/Component/Utility/Random.php b/core/lib/Drupal/Component/Utility/Random.php
index 1aeeb958da086f01b402a083f18858844be322f6..3c98b83b6376332f407150487b1cf1542b93065e 100644
--- a/core/lib/Drupal/Component/Utility/Random.php
+++ b/core/lib/Drupal/Component/Utility/Random.php
@@ -24,14 +24,14 @@ class Random {
    *
    * @var array
    */
-  protected $strings = array();
+  protected $strings = [];
 
   /**
    * A list of unique names generated by name().
    *
    * @var array
    */
-  protected $names = array();
+  protected $names = [];
 
   /**
    * Generates a random string of ASCII characters of codes 32 to 126.
@@ -141,9 +141,9 @@ public function name($length = 8, $unique = FALSE) {
   public function word($length) {
     mt_srand((double) microtime() * 1000000);
 
-    $vowels = array("a", "e", "i", "o", "u");
-    $cons = array("b", "c", "d", "g", "h", "j", "k", "l", "m", "n", "p", "r", "s", "t", "u", "v", "w", "tr",
-      "cr", "br", "fr", "th", "dr", "ch", "ph", "wr", "st", "sp", "sw", "pr", "sl", "cl", "sh");
+    $vowels = ["a", "e", "i", "o", "u"];
+    $cons = ["b", "c", "d", "g", "h", "j", "k", "l", "m", "n", "p", "r", "s", "t", "u", "v", "w", "tr",
+      "cr", "br", "fr", "th", "dr", "ch", "ph", "wr", "st", "sp", "sw", "pr", "sl", "cl", "sh"];
 
     $num_vowels = count($vowels);
     $num_cons = count($cons);
@@ -190,7 +190,7 @@ public function object($size = 4) {
    *   Nonsense latin words which form sentence(s).
    */
   public function sentences($min_word_count, $capitalize = FALSE) {
-    $dictionary = array("abbas", "abdo", "abico", "abigo", "abluo", "accumsan",
+    $dictionary = ["abbas", "abdo", "abico", "abigo", "abluo", "accumsan",
       "acsi", "ad", "adipiscing", "aliquam", "aliquip", "amet", "antehabeo",
       "appellatio", "aptent", "at", "augue", "autem", "bene", "blandit",
       "brevitas", "caecus", "camur", "capto", "causa", "cogo", "comis",
@@ -219,7 +219,7 @@ public function sentences($min_word_count, $capitalize = FALSE) {
       "utrum", "uxor", "valde", "valetudo", "validus", "vel", "velit",
       "veniam", "venio", "vereor", "vero", "verto", "vicis", "vindico",
       "virtus", "voco", "volutpat", "vulpes", "vulputate", "wisi", "ymo",
-      "zelus");
+      "zelus"];
     $dictionary_flipped = array_flip($dictionary);
     $greeking = '';
 
diff --git a/core/lib/Drupal/Component/Utility/Tags.php b/core/lib/Drupal/Component/Utility/Tags.php
index 3f8ed13ebaa624a920a0b8cf6b0e66d1f2f71af6..ac0ce60817abd30cba05f833f3cc99fd0f2d7573 100644
--- a/core/lib/Drupal/Component/Utility/Tags.php
+++ b/core/lib/Drupal/Component/Utility/Tags.php
@@ -25,7 +25,7 @@ public static function explode($tags) {
     preg_match_all($regexp, $tags, $matches);
     $typed_tags = array_unique($matches[1]);
 
-    $tags = array();
+    $tags = [];
     foreach ($typed_tags as $tag) {
       // If a user has escaped a term (to demonstrate that it is a group,
       // or includes a comma or quote character), we remove the escape
@@ -65,7 +65,7 @@ public static function encode($tag) {
    *   The imploded string.
    */
   public static function implode($tags) {
-    $encoded_tags = array();
+    $encoded_tags = [];
     foreach ($tags as $tag) {
       $encoded_tags[] = self::encode($tag);
     }
diff --git a/core/lib/Drupal/Component/Utility/Timer.php b/core/lib/Drupal/Component/Utility/Timer.php
index 959eeb339e3ed9b709f88288eead646f190716be..b8dc0269764aae96a47b7327e3bfb100d941844c 100644
--- a/core/lib/Drupal/Component/Utility/Timer.php
+++ b/core/lib/Drupal/Component/Utility/Timer.php
@@ -9,7 +9,7 @@
  */
 class Timer {
 
-  static protected $timers = array();
+  static protected $timers = [];
 
   /**
    * Starts the timer with the specified name.
diff --git a/core/lib/Drupal/Component/Utility/Unicode.php b/core/lib/Drupal/Component/Utility/Unicode.php
index f6b4668482854a108b019cbc9c946ada6cec9bd4..98db80431c7e4eead5f9c8f3744c504afb81ddf0 100644
--- a/core/lib/Drupal/Component/Utility/Unicode.php
+++ b/core/lib/Drupal/Component/Utility/Unicode.php
@@ -125,7 +125,7 @@ public static function getStatus() {
    *   The new status of multibyte support.
    */
   public static function setStatus($status) {
-    if (!in_array($status, array(static::STATUS_SINGLEBYTE, static::STATUS_MULTIBYTE, static::STATUS_ERROR))) {
+    if (!in_array($status, [static::STATUS_SINGLEBYTE, static::STATUS_MULTIBYTE, static::STATUS_ERROR])) {
       throw new \InvalidArgumentException('Invalid status value for unicode support.');
     }
     static::$status = $status;
@@ -189,7 +189,7 @@ public static function check() {
    *   The name of the encoding, or FALSE if no byte order mark was present.
    */
   public static function encodingFromBOM($data) {
-    static $bomMap = array(
+    static $bomMap = [
       "\xEF\xBB\xBF" => 'UTF-8',
       "\xFE\xFF" => 'UTF-16BE',
       "\xFF\xFE" => 'UTF-16LE',
@@ -200,7 +200,7 @@ public static function encodingFromBOM($data) {
       "\x2B\x2F\x76\x2B" => 'UTF-7',
       "\x2B\x2F\x76\x2F" => 'UTF-7',
       "\x2B\x2F\x76\x38\x2D" => 'UTF-7',
-    );
+    ];
 
     foreach ($bomMap as $bom => $encoding) {
       if (strpos($data, $bom) === 0) {
@@ -542,7 +542,7 @@ public static function truncate($string, $max_length, $wordsafe = FALSE, $add_el
     }
 
     if ($wordsafe) {
-      $matches = array();
+      $matches = [];
       // Find the last word boundary, if there is one within $min_wordsafe_length
       // to $max_length characters. preg_match() is always greedy, so it will
       // find the longest string possible.
diff --git a/core/lib/Drupal/Component/Utility/UrlHelper.php b/core/lib/Drupal/Component/Utility/UrlHelper.php
index 1395d818f041b1af3ca4727f9748655e66cb80c0..04c217b6afd7983af9ecb7ea74524d31655e0f3d 100644
--- a/core/lib/Drupal/Component/Utility/UrlHelper.php
+++ b/core/lib/Drupal/Component/Utility/UrlHelper.php
@@ -14,7 +14,7 @@ class UrlHelper {
    *
    * @var array
    */
-  protected static $allowedProtocols = array('http', 'https');
+  protected static $allowedProtocols = ['http', 'https'];
 
   /**
    * Parses an array into a valid, rawurlencoded query string.
@@ -43,7 +43,7 @@ class UrlHelper {
    * @ingroup php_wrappers
    */
   public static function buildQuery(array $query, $parent = '') {
-    $params = array();
+    $params = [];
 
     foreach ($query as $key => $value) {
       $key = ($parent ? $parent . '[' . rawurlencode($key) . ']' : rawurlencode($key));
@@ -79,7 +79,7 @@ public static function buildQuery(array $query, $parent = '') {
    * @return
    *   An array containing query parameters.
    */
-  public static function filterQueryParameters(array $query, array $exclude = array(), $parent = '') {
+  public static function filterQueryParameters(array $query, array $exclude = [], $parent = '') {
     // If $exclude is empty, there is nothing to filter.
     if (empty($exclude)) {
       return $query;
@@ -88,7 +88,7 @@ public static function filterQueryParameters(array $query, array $exclude = arra
       $exclude = array_flip($exclude);
     }
 
-    $params = array();
+    $params = [];
     foreach ($query as $key => $value) {
       $string_key = ($parent ? $parent . '[' . $key . ']' : $key);
       if (isset($exclude[$string_key])) {
@@ -134,11 +134,11 @@ public static function filterQueryParameters(array $query, array $exclude = arra
    * @ingroup php_wrappers
    */
   public static function parse($url) {
-    $options = array(
+    $options = [
       'path' => NULL,
-      'query' => array(),
+      'query' => [],
       'fragment' => '',
-    );
+    ];
 
     // External URLs: not using parse_url() here, so we do not have to rebuild
     // the scheme, host, and path without having any use for it.
@@ -294,7 +294,7 @@ public static function getAllowedProtocols() {
    * @param array $protocols
    *   An array of protocols, for example http, https and irc.
    */
-  public static function setAllowedProtocols(array $protocols = array()) {
+  public static function setAllowedProtocols(array $protocols = []) {
     static::$allowedProtocols = $protocols;
   }
 
diff --git a/core/lib/Drupal/Component/Utility/UserAgent.php b/core/lib/Drupal/Component/Utility/UserAgent.php
index 2fc67d67d56f962e6e4ddc3e070b37ac7f897b17..c80c44e19debc091242c711a44bca75e388d4f9a 100644
--- a/core/lib/Drupal/Component/Utility/UserAgent.php
+++ b/core/lib/Drupal/Component/Utility/UserAgent.php
@@ -36,7 +36,7 @@ class UserAgent {
    *   The selected language code or FALSE if no valid language can be
    *   identified.
    */
-  public static function getBestMatchingLangcode($http_accept_language, $langcodes, $mappings = array()) {
+  public static function getBestMatchingLangcode($http_accept_language, $langcodes, $mappings = []) {
     // The Accept-Language header contains information about the language
     // preferences configured in the user's user agent / operating system.
     // RFC 2616 (section 14.4) defines the Accept-Language header as follows:
@@ -44,7 +44,7 @@ public static function getBestMatchingLangcode($http_accept_language, $langcodes
     //                  1#( language-range [ ";" "q" "=" qvalue ] )
     //   language-range  = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) | "*" )
     // Samples: "hu, en-us;q=0.66, en;q=0.33", "hu,en-us;q=0.5"
-    $ua_langcodes = array();
+    $ua_langcodes = [];
     if (preg_match_all('@(?<=[, ]|^)([a-zA-Z-]+|\*)(?:;q=([0-9.]+))?(?:$|\s*,\s*)@', trim($http_accept_language), $matches, PREG_SET_ORDER)) {
       foreach ($matches as $match) {
         if ($mappings) {
diff --git a/core/lib/Drupal/Component/Utility/Variable.php b/core/lib/Drupal/Component/Utility/Variable.php
index 5a830797116e7a4cef6c9062d8f16c65d74f34bd..c6c6935a9bd364afdfdd422a8ac66776ddc960e1 100644
--- a/core/lib/Drupal/Component/Utility/Variable.php
+++ b/core/lib/Drupal/Component/Utility/Variable.php
@@ -43,7 +43,7 @@ public static function export($var, $prefix = '') {
         // If the string contains a line break or a single quote, use the
         // double quote export mode. Encode backslash, dollar symbols, and
         // double quotes and transform some common control characters.
-        $var = str_replace(array('\\', '$', '"', "\n", "\r", "\t"), array('\\\\', '\$', '\"', '\n', '\r', '\t'), $var);
+        $var = str_replace(['\\', '$', '"', "\n", "\r", "\t"], ['\\\\', '\$', '\"', '\n', '\r', '\t'], $var);
         $output = '"' . $var . '"';
       }
       else {
diff --git a/core/lib/Drupal/Component/Utility/Xss.php b/core/lib/Drupal/Component/Utility/Xss.php
index d9f24b4e8328c2802f0f59d9e68d7a5ab997fd06..f5e99fe88606da252ae9514594ef99bda16f72d3 100644
--- a/core/lib/Drupal/Component/Utility/Xss.php
+++ b/core/lib/Drupal/Component/Utility/Xss.php
@@ -16,7 +16,7 @@ class Xss {
    *
    * @see \Drupal\Component\Utility\Xss::filterAdmin()
    */
-  protected static $adminTags = array('a', 'abbr', 'acronym', 'address', 'article', 'aside', 'b', 'bdi', 'bdo', 'big', 'blockquote', 'br', 'caption', 'cite', 'code', 'col', 'colgroup', 'command', 'dd', 'del', 'details', 'dfn', 'div', 'dl', 'dt', 'em', 'figcaption', 'figure', 'footer', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'hgroup', 'hr', 'i', 'img', 'ins', 'kbd', 'li', 'mark', 'menu', 'meter', 'nav', 'ol', 'output', 'p', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'small', 'span', 'strong', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'time', 'tr', 'tt', 'u', 'ul', 'var', 'wbr');
+  protected static $adminTags = ['a', 'abbr', 'acronym', 'address', 'article', 'aside', 'b', 'bdi', 'bdo', 'big', 'blockquote', 'br', 'caption', 'cite', 'code', 'col', 'colgroup', 'command', 'dd', 'del', 'details', 'dfn', 'div', 'dl', 'dt', 'em', 'figcaption', 'figure', 'footer', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'hgroup', 'hr', 'i', 'img', 'ins', 'kbd', 'li', 'mark', 'menu', 'meter', 'nav', 'ol', 'output', 'p', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'small', 'span', 'strong', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'time', 'tr', 'tt', 'u', 'ul', 'var', 'wbr'];
 
   /**
    * The default list of HTML tags allowed by filter().
@@ -25,7 +25,7 @@ class Xss {
    *
    * @see \Drupal\Component\Utility\Xss::filter()
    */
-  protected static $htmlTags = array('a', 'em', 'strong', 'cite', 'blockquote', 'code', 'ul', 'ol', 'li', 'dl', 'dt', 'dd');
+  protected static $htmlTags = ['a', 'em', 'strong', 'cite', 'blockquote', 'code', 'ul', 'ol', 'li', 'dl', 'dt', 'dd'];
 
   /**
    * Filters HTML to prevent cross-site-scripting (XSS) vulnerabilities.
@@ -196,7 +196,7 @@ protected static function split($string, $html_tags, $class) {
    *   Cleaned up version of the HTML attributes.
    */
   protected static function attributes($attributes) {
-    $attributes_array = array();
+    $attributes_array = [];
     $mode = 0;
     $attribute_name = '';
     $skip = FALSE;
@@ -221,12 +221,12 @@ protected static function attributes($attributes) {
             // such attributes.
             // @see \Drupal\Component\Utility\UrlHelper::filterBadProtocol()
             // @see http://www.w3.org/TR/html4/index/attributes.html
-            $skip_protocol_filtering = substr($attribute_name, 0, 5) === 'data-' || in_array($attribute_name, array(
+            $skip_protocol_filtering = substr($attribute_name, 0, 5) === 'data-' || in_array($attribute_name, [
               'title',
               'alt',
               'rel',
               'property',
-            ));
+            ]);
 
             $working = $mode = 1;
             $attributes = preg_replace('/^[-a-zA-Z][-a-zA-Z0-9]*/', '', $attributes);
diff --git a/core/lib/Drupal/Core/Access/AccessManager.php b/core/lib/Drupal/Core/Access/AccessManager.php
index 95e7721df09cb2fd56bf1f249d50287e9cbcefcc..b7b7c0bfc13269bde5dff6c741a49a7441248dbc 100644
--- a/core/lib/Drupal/Core/Access/AccessManager.php
+++ b/core/lib/Drupal/Core/Access/AccessManager.php
@@ -78,7 +78,7 @@ public function __construct(RouteProviderInterface $route_provider, ParamConvert
   /**
    * {@inheritdoc}
    */
-  public function checkNamedRoute($route_name, array $parameters = array(), AccountInterface $account = NULL, $return_as_object = FALSE) {
+  public function checkNamedRoute($route_name, array $parameters = [], AccountInterface $account = NULL, $return_as_object = FALSE) {
     try {
       $route = $this->routeProvider->getRouteByName($route_name, $parameters);
 
@@ -120,7 +120,7 @@ public function check(RouteMatchInterface $route_match, AccountInterface $accoun
       $account = $this->currentUser;
     }
     $route = $route_match->getRouteObject();
-    $checks = $route->getOption('_access_checks') ?: array();
+    $checks = $route->getOption('_access_checks') ?: [];
 
     // Filter out checks which require the incoming request.
     if (!isset($request)) {
diff --git a/core/lib/Drupal/Core/Access/AccessManagerInterface.php b/core/lib/Drupal/Core/Access/AccessManagerInterface.php
index fc2a0e83cb3bebb271ece8813e89ea34e8cd025e..bbb1ec95efb1e3ecf25d34f8151bf2c5c7a37842 100644
--- a/core/lib/Drupal/Core/Access/AccessManagerInterface.php
+++ b/core/lib/Drupal/Core/Access/AccessManagerInterface.php
@@ -33,7 +33,7 @@ interface AccessManagerInterface {
    *   returned, i.e. TRUE means access is explicitly allowed, FALSE means
    *   access is either explicitly forbidden or "no opinion".
    */
-  public function checkNamedRoute($route_name, array $parameters = array(), AccountInterface $account = NULL, $return_as_object = FALSE);
+  public function checkNamedRoute($route_name, array $parameters = [], AccountInterface $account = NULL, $return_as_object = FALSE);
 
   /**
    * Execute access checks against the incoming request.
diff --git a/core/lib/Drupal/Core/Access/AccessResult.php b/core/lib/Drupal/Core/Access/AccessResult.php
index d87872a0a340a0f06a5e4e50a654a22819de70dc..1cd6b8bacdc7f78562a8809df124aadb2c8b8bcd 100644
--- a/core/lib/Drupal/Core/Access/AccessResult.php
+++ b/core/lib/Drupal/Core/Access/AccessResult.php
@@ -261,7 +261,7 @@ public function setCacheMaxAge($max_age) {
    * @return $this
    */
   public function cachePerPermissions() {
-    $this->addCacheContexts(array('user.permissions'));
+    $this->addCacheContexts(['user.permissions']);
     return $this;
   }
 
@@ -271,7 +271,7 @@ public function cachePerPermissions() {
    * @return $this
    */
   public function cachePerUser() {
-    $this->addCacheContexts(array('user'));
+    $this->addCacheContexts(['user']);
     return $this;
   }
 
diff --git a/core/lib/Drupal/Core/Access/CheckProvider.php b/core/lib/Drupal/Core/Access/CheckProvider.php
index c68cf38a20fc19896304af09685dc3d489d4aa7e..d6ba1cf6dd3c77f05c11bc3197042c9ae9fd5125 100644
--- a/core/lib/Drupal/Core/Access/CheckProvider.php
+++ b/core/lib/Drupal/Core/Access/CheckProvider.php
@@ -20,7 +20,7 @@ class CheckProvider implements CheckProviderInterface, ContainerAwareInterface {
    *
    * @var array
    */
-  protected $checkIds = array();
+  protected $checkIds = [];
 
   /**
    * Array of access check objects keyed by service id.
@@ -34,12 +34,12 @@ class CheckProvider implements CheckProviderInterface, ContainerAwareInterface {
    *
    * @var array
    */
-  protected $checkMethods = array();
+  protected $checkMethods = [];
 
   /**
    * Array of access checks which only will be run on the incoming request.
    */
-  protected $checksNeedsRequest = array();
+  protected $checksNeedsRequest = [];
 
   /**
    * An array to map static requirement keys to service IDs.
@@ -58,7 +58,7 @@ class CheckProvider implements CheckProviderInterface, ContainerAwareInterface {
   /**
    * {@inheritdoc}
    */
-  public function addCheckService($service_id, $service_method, array $applies_checks = array(), $needs_incoming_request = FALSE) {
+  public function addCheckService($service_id, $service_method, array $applies_checks = [], $needs_incoming_request = FALSE) {
     $this->checkIds[] = $service_id;
     $this->checkMethods[$service_id] = $service_method;
     if ($needs_incoming_request) {
@@ -102,7 +102,7 @@ public function loadCheck($service_id) {
       if (!($check instanceof AccessInterface)) {
         throw new AccessException('All access checks must implement AccessInterface.');
       }
-      if (!is_callable(array($check, $this->checkMethods[$service_id]))) {
+      if (!is_callable([$check, $this->checkMethods[$service_id]])) {
         throw new AccessException(sprintf('Access check method %s in service %s must be callable.', $this->checkMethods[$service_id], $service_id));
       }
 
@@ -122,7 +122,7 @@ public function loadCheck($service_id) {
    *   route.
    */
   protected function applies(Route $route) {
-    $checks = array();
+    $checks = [];
 
     // Iterate through map requirements from appliesTo() on access checkers.
     // Only iterate through all checkIds if this is not used.
@@ -151,7 +151,7 @@ protected function loadDynamicRequirementMap() {
     }
 
     // Set them here, so we can use the isset() check above.
-    $this->dynamicRequirementMap = array();
+    $this->dynamicRequirementMap = [];
 
     foreach ($this->checkIds as $service_id) {
       if (empty($this->checks[$service_id])) {
diff --git a/core/lib/Drupal/Core/Access/CheckProviderInterface.php b/core/lib/Drupal/Core/Access/CheckProviderInterface.php
index bb0dd4af97c5731956df0474424487a5090e2732..a94a92c97842c43698f9f66f7ae80f7f8be2bb79 100644
--- a/core/lib/Drupal/Core/Access/CheckProviderInterface.php
+++ b/core/lib/Drupal/Core/Access/CheckProviderInterface.php
@@ -37,7 +37,7 @@ public function setChecks(RouteCollection $routes);
    * @param bool $needs_incoming_request
    *   (optional) True if access-check method only acts on an incoming request.
    */
-  public function addCheckService($service_id, $service_method, array $applies_checks = array(), $needs_incoming_request = FALSE);
+  public function addCheckService($service_id, $service_method, array $applies_checks = [], $needs_incoming_request = FALSE);
 
   /**
    * Lazy-loads access check services.
diff --git a/core/lib/Drupal/Core/Access/CsrfRequestHeaderAccessCheck.php b/core/lib/Drupal/Core/Access/CsrfRequestHeaderAccessCheck.php
index 5548c7f90fb40a52d523be6f9bc0493d75a6e5ff..563355a6b765ec509687d5689e8e0f3ab2a8609b 100644
--- a/core/lib/Drupal/Core/Access/CsrfRequestHeaderAccessCheck.php
+++ b/core/lib/Drupal/Core/Access/CsrfRequestHeaderAccessCheck.php
@@ -64,7 +64,7 @@ public function applies(Route $route) {
         $methods = explode('|', $requirements['_method']);
         // CSRF protection only applies to write operations, so we can filter
         // out any routes that require reading methods only.
-        $write_methods = array_diff($methods, array('GET', 'HEAD', 'OPTIONS', 'TRACE'));
+        $write_methods = array_diff($methods, ['GET', 'HEAD', 'OPTIONS', 'TRACE']);
         if (empty($write_methods)) {
           return FALSE;
         }
@@ -93,7 +93,7 @@ public function access(Request $request, AccountInterface $account) {
     // 1. this is a write operation
     // 2. the user was successfully authenticated and
     // 3. the request comes with a session cookie.
-    if (!in_array($method, array('GET', 'HEAD', 'OPTIONS', 'TRACE'))
+    if (!in_array($method, ['GET', 'HEAD', 'OPTIONS', 'TRACE'])
       && $account->isAuthenticated()
       && $this->sessionConfiguration->hasSession($request)
     ) {
diff --git a/core/lib/Drupal/Core/Action/ConfigurableActionBase.php b/core/lib/Drupal/Core/Action/ConfigurableActionBase.php
index 2bbc9122c27e3457d6f9a3080ba06352b44bbede..3d372fe646951bf0e011699289124d207a048d1b 100644
--- a/core/lib/Drupal/Core/Action/ConfigurableActionBase.php
+++ b/core/lib/Drupal/Core/Action/ConfigurableActionBase.php
@@ -24,7 +24,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array();
+    return [];
   }
 
   /**
@@ -51,7 +51,7 @@ public function validateConfigurationForm(array &$form, FormStateInterface $form
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/AddCssCommand.php b/core/lib/Drupal/Core/Ajax/AddCssCommand.php
index fbb5ce4bb204cd4dfa915051fd5fa0c6d9c5358a..80ee17aa0334ed7820c937906f65d01ecdb09d6c 100644
--- a/core/lib/Drupal/Core/Ajax/AddCssCommand.php
+++ b/core/lib/Drupal/Core/Ajax/AddCssCommand.php
@@ -39,10 +39,10 @@ public function __construct($styles) {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'add_css',
       'data' => $this->styles,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/AfterCommand.php b/core/lib/Drupal/Core/Ajax/AfterCommand.php
index 05060a6ce75add8da8044827d06b512879e09221..41e232d20ebeb7f234044249efc60c7d3665f3f6 100644
--- a/core/lib/Drupal/Core/Ajax/AfterCommand.php
+++ b/core/lib/Drupal/Core/Ajax/AfterCommand.php
@@ -23,13 +23,13 @@ class AfterCommand extends InsertCommand {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'insert',
       'method' => 'after',
       'selector' => $this->selector,
       'data' => $this->getRenderedContent(),
       'settings' => $this->settings,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/AjaxResponse.php b/core/lib/Drupal/Core/Ajax/AjaxResponse.php
index 4b12578d85eb555dedf2f1240191be4497db54af..4d1c123348edea6f523dec32c6a604c88398321c 100644
--- a/core/lib/Drupal/Core/Ajax/AjaxResponse.php
+++ b/core/lib/Drupal/Core/Ajax/AjaxResponse.php
@@ -21,7 +21,7 @@ class AjaxResponse extends JsonResponse implements AttachmentsInterface {
    *
    * @var array
    */
-  protected $commands = array();
+  protected $commands = [];
 
   /**
    * Add an AJAX command to the response.
diff --git a/core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php b/core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php
index 45aa45e4f8c80e5a1fb7a3f5c0d03d37003f14d7..ee5208b07847b283febde1d6639dcf1bc53c5809 100644
--- a/core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php
+++ b/core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php
@@ -167,7 +167,7 @@ protected function buildAttachmentsCommands(AjaxResponse $response, Request $req
     }
 
     // Prepend commands to add the assets, preserving their relative order.
-    $resource_commands = array();
+    $resource_commands = [];
     if ($css_assets) {
       $css_render_array = $this->cssCollectionRenderer->render($css_assets);
       $resource_commands[] = new AddCssCommand($this->renderer->renderPlain($css_render_array));
diff --git a/core/lib/Drupal/Core/Ajax/AlertCommand.php b/core/lib/Drupal/Core/Ajax/AlertCommand.php
index 46388d00571efcf85527719c5081c3ece1cfb8a7..360036f4538e6321cbcc24a3e7cf8dd48507ba16 100644
--- a/core/lib/Drupal/Core/Ajax/AlertCommand.php
+++ b/core/lib/Drupal/Core/Ajax/AlertCommand.php
@@ -31,10 +31,10 @@ public function __construct($text) {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'alert',
       'text' => $this->text,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/AppendCommand.php b/core/lib/Drupal/Core/Ajax/AppendCommand.php
index e1830914cc5c21f56dd36f29ebb980d28d1b6487..34c751d7ee6f176162b9390dda5e40be766c4b2a 100644
--- a/core/lib/Drupal/Core/Ajax/AppendCommand.php
+++ b/core/lib/Drupal/Core/Ajax/AppendCommand.php
@@ -23,13 +23,13 @@ class AppendCommand extends InsertCommand {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'insert',
       'method' => 'append',
       'selector' => $this->selector,
       'data' => $this->getRenderedContent(),
       'settings' => $this->settings,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/BaseCommand.php b/core/lib/Drupal/Core/Ajax/BaseCommand.php
index f15065796263d977dd4f676728fde02a7ccc7e6d..eeb36cf2b65925fb1e39d17551cf9023bfffc180 100644
--- a/core/lib/Drupal/Core/Ajax/BaseCommand.php
+++ b/core/lib/Drupal/Core/Ajax/BaseCommand.php
@@ -38,10 +38,10 @@ public function __construct($command, $data) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => $this->command,
       'data' => $this->data,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/BeforeCommand.php b/core/lib/Drupal/Core/Ajax/BeforeCommand.php
index 04290e026444f08570fb7f12b6d6413e26ed9fb9..8de47c8e64eb4051054cab9395fe8c2ea37e40e5 100644
--- a/core/lib/Drupal/Core/Ajax/BeforeCommand.php
+++ b/core/lib/Drupal/Core/Ajax/BeforeCommand.php
@@ -23,13 +23,13 @@ class BeforeCommand extends InsertCommand {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'insert',
       'method' => 'before',
       'selector' => $this->selector,
       'data' => $this->getRenderedContent(),
       'settings' => $this->settings,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/ChangedCommand.php b/core/lib/Drupal/Core/Ajax/ChangedCommand.php
index b128cfc4f3fda969756e43a3d9ea22bbc7fc8748..0027d7c59e4d72575b3f3edd255e875ddad1fed6 100644
--- a/core/lib/Drupal/Core/Ajax/ChangedCommand.php
+++ b/core/lib/Drupal/Core/Ajax/ChangedCommand.php
@@ -50,11 +50,11 @@ public function __construct($selector, $asterisk = '') {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'changed',
       'selector' => $this->selector,
       'asterisk' => $this->asterisk,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/CloseDialogCommand.php b/core/lib/Drupal/Core/Ajax/CloseDialogCommand.php
index fa58208b400897a9372610fa5ea6f92d020a1146..1feeb0c8c02fcb410a8137dacd0dbe3a0f02d496 100644
--- a/core/lib/Drupal/Core/Ajax/CloseDialogCommand.php
+++ b/core/lib/Drupal/Core/Ajax/CloseDialogCommand.php
@@ -40,11 +40,11 @@ public function __construct($selector = NULL, $persist = FALSE) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'closeDialog',
       'selector' => $this->selector,
       'persist' => $this->persist,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/CssCommand.php b/core/lib/Drupal/Core/Ajax/CssCommand.php
index b12cc09fcd1c43c8ee3ff248079e6429108cb6be..016c8134ff444a01c4ae19b7a76512f554753130 100644
--- a/core/lib/Drupal/Core/Ajax/CssCommand.php
+++ b/core/lib/Drupal/Core/Ajax/CssCommand.php
@@ -32,7 +32,7 @@ class CssCommand implements CommandInterface {
    *
    * @var array
    */
-  protected $css = array();
+  protected $css = [];
 
   /**
    * Constructs a CssCommand object.
@@ -42,7 +42,7 @@ class CssCommand implements CommandInterface {
    * @param array $css
    *   An array of CSS property/value pairs to set.
    */
-  public function __construct($selector, array $css = array()) {
+  public function __construct($selector, array $css = []) {
     $this->selector = $selector;
     $this->css = $css;
   }
@@ -67,11 +67,11 @@ public function setProperty($property, $value) {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'css',
       'selector' => $this->selector,
       'argument' => $this->css,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/DataCommand.php b/core/lib/Drupal/Core/Ajax/DataCommand.php
index 92b87bde8d8422eed1a9be5c01034636f7be8bf2..a1bee21469aec74ece7c37a9acc7f9b82cb1a7b3 100644
--- a/core/lib/Drupal/Core/Ajax/DataCommand.php
+++ b/core/lib/Drupal/Core/Ajax/DataCommand.php
@@ -62,12 +62,12 @@ public function __construct($selector, $name, $value) {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'data',
       'selector' => $this->selector,
       'name' => $this->name,
       'value' => $this->value,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/HtmlCommand.php b/core/lib/Drupal/Core/Ajax/HtmlCommand.php
index 39635c3ca24928e388682e87002d5f59d7be77f9..e39f08f59f739db7fb9b55c696d1cca42bc28e9f 100644
--- a/core/lib/Drupal/Core/Ajax/HtmlCommand.php
+++ b/core/lib/Drupal/Core/Ajax/HtmlCommand.php
@@ -23,13 +23,13 @@ class HtmlCommand extends InsertCommand {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'insert',
       'method' => 'html',
       'selector' => $this->selector,
       'data' => $this->getRenderedContent(),
       'settings' => $this->settings,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/InsertCommand.php b/core/lib/Drupal/Core/Ajax/InsertCommand.php
index 00cb616ef3b9afd1a5ffb85f801a62cc9b0a3738..1813e500645b2abd797d994b9955a581a2ae20e1 100644
--- a/core/lib/Drupal/Core/Ajax/InsertCommand.php
+++ b/core/lib/Drupal/Core/Ajax/InsertCommand.php
@@ -66,13 +66,13 @@ public function __construct($selector, $content, array $settings = NULL) {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'insert',
       'method' => NULL,
       'selector' => $this->selector,
       'data' => $this->getRenderedContent(),
       'settings' => $this->settings,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/InvokeCommand.php b/core/lib/Drupal/Core/Ajax/InvokeCommand.php
index 41958885b35141c64dc69493f0b9da55b4924963..46e37ffea4e219e6f96b31a7437035b4753f9620 100644
--- a/core/lib/Drupal/Core/Ajax/InvokeCommand.php
+++ b/core/lib/Drupal/Core/Ajax/InvokeCommand.php
@@ -51,7 +51,7 @@ class InvokeCommand implements CommandInterface {
    * @param array $arguments
    *   An optional array of arguments to pass to the method.
    */
-  public function __construct($selector, $method, array $arguments = array()) {
+  public function __construct($selector, $method, array $arguments = []) {
     $this->selector = $selector;
     $this->method = $method;
     $this->arguments = $arguments;
@@ -62,12 +62,12 @@ public function __construct($selector, $method, array $arguments = array()) {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'invoke',
       'selector' => $this->selector,
       'method' => $this->method,
       'args' => $this->arguments,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/OpenDialogCommand.php b/core/lib/Drupal/Core/Ajax/OpenDialogCommand.php
index 30b65fac44136671ed4f47c2a12af62cd6853894..2b0fcdd2620686d98d79419a45d669e76c34b3a0 100644
--- a/core/lib/Drupal/Core/Ajax/OpenDialogCommand.php
+++ b/core/lib/Drupal/Core/Ajax/OpenDialogCommand.php
@@ -70,9 +70,9 @@ class OpenDialogCommand implements CommandInterface, CommandWithAttachedAssetsIn
    *   on the content of the dialog. If left empty, the settings will be
    *   populated automatically from the current request.
    */
-  public function __construct($selector, $title, $content, array $dialog_options = array(), $settings = NULL) {
+  public function __construct($selector, $title, $content, array $dialog_options = [], $settings = NULL) {
     $title = PlainTextOutput::renderFromHtml($title);
-    $dialog_options += array('title' => $title);
+    $dialog_options += ['title' => $title];
     $this->selector = $selector;
     $this->content = $content;
     $this->dialogOptions = $dialog_options;
@@ -128,13 +128,13 @@ public function setDialogTitle($title) {
   public function render() {
     // For consistency ensure the modal option is set to TRUE or FALSE.
     $this->dialogOptions['modal'] = isset($this->dialogOptions['modal']) && $this->dialogOptions['modal'];
-    return array(
+    return [
       'command' => 'openDialog',
       'selector' => $this->selector,
       'settings' => $this->settings,
       'data' => $this->getRenderedContent(),
       'dialogOptions' => $this->dialogOptions,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/OpenModalDialogCommand.php b/core/lib/Drupal/Core/Ajax/OpenModalDialogCommand.php
index edb4fe30867109bfcc43f48746674938b0d7155d..53d6e823eab87026c8a4fd8e057f6d0b7372d80c 100644
--- a/core/lib/Drupal/Core/Ajax/OpenModalDialogCommand.php
+++ b/core/lib/Drupal/Core/Ajax/OpenModalDialogCommand.php
@@ -29,7 +29,7 @@ class OpenModalDialogCommand extends OpenDialogCommand {
    *   on the content of the dialog. If left empty, the settings will be
    *   populated automatically from the current request.
    */
-  public function __construct($title, $content, array $dialog_options = array(), $settings = NULL) {
+  public function __construct($title, $content, array $dialog_options = [], $settings = NULL) {
     $dialog_options['modal'] = TRUE;
     parent::__construct('#drupal-modal', $title, $content, $dialog_options, $settings);
   }
diff --git a/core/lib/Drupal/Core/Ajax/PrependCommand.php b/core/lib/Drupal/Core/Ajax/PrependCommand.php
index 5e41baec4ef38082f045d1f38aaed3d1f4e08c87..e3902b8f44f7a12c52baa64a5059a7a52a62bd78 100644
--- a/core/lib/Drupal/Core/Ajax/PrependCommand.php
+++ b/core/lib/Drupal/Core/Ajax/PrependCommand.php
@@ -23,13 +23,13 @@ class PrependCommand extends InsertCommand {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'insert',
       'method' => 'prepend',
       'selector' => $this->selector,
       'data' => $this->getRenderedContent(),
       'settings' => $this->settings,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/RedirectCommand.php b/core/lib/Drupal/Core/Ajax/RedirectCommand.php
index 7dbf26eb9fa3a27265b45d3aa8a41e2c1c102afb..572c62f46c539629ac2bcb98cf67c3479db0fb02 100644
--- a/core/lib/Drupal/Core/Ajax/RedirectCommand.php
+++ b/core/lib/Drupal/Core/Ajax/RedirectCommand.php
@@ -31,10 +31,10 @@ public function __construct($url) {
    * Implements \Drupal\Core\Ajax\CommandInterface:render().
    */
   public function render() {
-    return array(
+    return [
       'command' => 'redirect',
       'url' => $this->url,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/RemoveCommand.php b/core/lib/Drupal/Core/Ajax/RemoveCommand.php
index c52211d80a48331b5a3ffa04f2ad9f462b5c70eb..d7f86ddd257f296b1c5f1ce3e5d179396be77cdd 100644
--- a/core/lib/Drupal/Core/Ajax/RemoveCommand.php
+++ b/core/lib/Drupal/Core/Ajax/RemoveCommand.php
@@ -38,10 +38,10 @@ public function __construct($selector) {
    * Implements Drupal\Core\Ajax\CommandInterface:render().
    */
   public function render() {
-    return array(
+    return [
       'command' => 'remove',
       'selector' => $this->selector,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/ReplaceCommand.php b/core/lib/Drupal/Core/Ajax/ReplaceCommand.php
index 8ccb7c125b05413a610dd1dfd2b13818e24f5bca..25927b7993ba063f54c1e2ded6645c780a1ac824 100644
--- a/core/lib/Drupal/Core/Ajax/ReplaceCommand.php
+++ b/core/lib/Drupal/Core/Ajax/ReplaceCommand.php
@@ -24,13 +24,13 @@ class ReplaceCommand extends InsertCommand {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'insert',
       'method' => 'replaceWith',
       'selector' => $this->selector,
       'data' => $this->getRenderedContent(),
       'settings' => $this->settings,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/RestripeCommand.php b/core/lib/Drupal/Core/Ajax/RestripeCommand.php
index 331e1bff0213933e85e9c9bbe1e1198d63cac17c..33b7e25269f7e1db0f19da3708c5575e6b879092 100644
--- a/core/lib/Drupal/Core/Ajax/RestripeCommand.php
+++ b/core/lib/Drupal/Core/Ajax/RestripeCommand.php
@@ -40,10 +40,10 @@ public function __construct($selector) {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'restripe',
       'selector' => $this->selector,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/SetDialogOptionCommand.php b/core/lib/Drupal/Core/Ajax/SetDialogOptionCommand.php
index 9e7836b29c9d790ee148b4b329e0b3730795582b..f24f97caf38e531617649eea91ca4ca3a634cad3 100644
--- a/core/lib/Drupal/Core/Ajax/SetDialogOptionCommand.php
+++ b/core/lib/Drupal/Core/Ajax/SetDialogOptionCommand.php
@@ -52,12 +52,12 @@ public function __construct($selector, $option_name, $option_value) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'setDialogOption',
       'selector' => $this->selector,
       'optionName' => $this->optionName,
       'optionValue' => $this->optionValue,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Ajax/SettingsCommand.php b/core/lib/Drupal/Core/Ajax/SettingsCommand.php
index 154ab9c813a9ec66d4802da3e8ed6064daea3aac..ca41720dcb29f7a5a71074b4ac1a8801d77c96f3 100644
--- a/core/lib/Drupal/Core/Ajax/SettingsCommand.php
+++ b/core/lib/Drupal/Core/Ajax/SettingsCommand.php
@@ -54,11 +54,11 @@ public function __construct(array $settings, $merge = FALSE) {
    */
   public function render() {
 
-    return array(
+    return [
       'command' => 'settings',
       'settings' => $this->settings,
       'merge' => $this->merge,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Annotation/ContextDefinition.php b/core/lib/Drupal/Core/Annotation/ContextDefinition.php
index abe14e5c90117c4f76c57bd209e0f145c45295aa..0ff61e6f1311e3c57574c665f23b6f30701fc0be 100644
--- a/core/lib/Drupal/Core/Annotation/ContextDefinition.php
+++ b/core/lib/Drupal/Core/Annotation/ContextDefinition.php
@@ -99,11 +99,11 @@ class ContextDefinition extends Plugin {
    *   ContextDefinitionInterface implementing class.
    */
   public function __construct(array $values) {
-    $values += array(
+    $values += [
       'required' => TRUE,
       'multiple' => FALSE,
       'default_value' => NULL,
-    );
+    ];
     // Annotation classes extract data from passed annotation classes directly
     // used in the classes they pass to.
     foreach (['label', 'description'] as $key) {
diff --git a/core/lib/Drupal/Core/Annotation/Translation.php b/core/lib/Drupal/Core/Annotation/Translation.php
index 4fcfb9e459bdfbc6539f42db5110bbc1c4e2df09..90fe5e02d59d9a560ad9220e4adc55290f28d96c 100644
--- a/core/lib/Drupal/Core/Annotation/Translation.php
+++ b/core/lib/Drupal/Core/Annotation/Translation.php
@@ -74,12 +74,12 @@ class Translation extends AnnotationBase {
    */
   public function __construct(array $values) {
     $string = $values['value'];
-    $arguments = isset($values['arguments']) ? $values['arguments'] : array();
-    $options = array();
+    $arguments = isset($values['arguments']) ? $values['arguments'] : [];
+    $options = [];
     if (!empty($values['context'])) {
-      $options = array(
+      $options = [
         'context' => $values['context'],
-      );
+      ];
     }
     $this->translation = new TranslatableMarkup($string, $arguments, $options);
   }
diff --git a/core/lib/Drupal/Core/Archiver/ArchiverInterface.php b/core/lib/Drupal/Core/Archiver/ArchiverInterface.php
index 38c62cb92c8f3a99cae68496d0e2a39c499b195f..2e635364bc891a186f86821e093b41a234cfdca0 100644
--- a/core/lib/Drupal/Core/Archiver/ArchiverInterface.php
+++ b/core/lib/Drupal/Core/Archiver/ArchiverInterface.php
@@ -47,7 +47,7 @@ public function remove($path);
    * @return \Drupal\Core\Archiver\ArchiverInterface
    *   The called object.
    */
-  public function extract($path, array $files = array());
+  public function extract($path, array $files = []);
 
   /**
    * Lists all files in the archive.
diff --git a/core/lib/Drupal/Core/Archiver/ArchiverManager.php b/core/lib/Drupal/Core/Archiver/ArchiverManager.php
index ee2dad5d1dff3c2962ef3042932981ac9f328a0a..7cd11f90a46c8cd2fcf09e6e214944e270e82fe3 100644
--- a/core/lib/Drupal/Core/Archiver/ArchiverManager.php
+++ b/core/lib/Drupal/Core/Archiver/ArchiverManager.php
@@ -36,7 +36,7 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $plugin_definition = $this->getDefinition($plugin_id);
     $plugin_class = DefaultFactory::getPluginClass($plugin_id, $plugin_definition, 'Drupal\Core\Archiver\ArchiverInterface');
     return new $plugin_class($configuration['filepath']);
diff --git a/core/lib/Drupal/Core/Archiver/Tar.php b/core/lib/Drupal/Core/Archiver/Tar.php
index 33f4de63c61f07351f15157ecdbf926f6168bf7f..3b33dddfe4d3ef1643004a59840e99a1508c05a5 100644
--- a/core/lib/Drupal/Core/Archiver/Tar.php
+++ b/core/lib/Drupal/Core/Archiver/Tar.php
@@ -52,7 +52,7 @@ public function remove($file_path) {
   /**
    * {@inheritdoc}
    */
-  public function extract($path, array $files = array()) {
+  public function extract($path, array $files = []) {
     if ($files) {
       $this->tar->extractList($files, $path);
     }
@@ -67,7 +67,7 @@ public function extract($path, array $files = array()) {
    * {@inheritdoc}
    */
   public function listContents() {
-    $files = array();
+    $files = [];
     foreach ($this->tar->listContent() as $file_data) {
       $files[] = $file_data['filename'];
     }
diff --git a/core/lib/Drupal/Core/Archiver/Zip.php b/core/lib/Drupal/Core/Archiver/Zip.php
index 640bcde808c6226adebb8459bb8f68b8839ec510..fd769c13cffb6ad9591c2584b1c38810c9d8303b 100644
--- a/core/lib/Drupal/Core/Archiver/Zip.php
+++ b/core/lib/Drupal/Core/Archiver/Zip.php
@@ -29,7 +29,7 @@ class Zip implements ArchiverInterface {
   public function __construct($file_path) {
     $this->zip = new \ZipArchive();
     if ($this->zip->open($file_path) !== TRUE) {
-      throw new ArchiverException(t('Cannot open %file_path', array('%file_path' => $file_path)));
+      throw new ArchiverException(t('Cannot open %file_path', ['%file_path' => $file_path]));
     }
   }
 
@@ -54,7 +54,7 @@ public function remove($file_path) {
   /**
    * {@inheritdoc}
    */
-  public function extract($path, array $files = array()) {
+  public function extract($path, array $files = []) {
     if ($files) {
       $this->zip->extractTo($path, $files);
     }
@@ -69,7 +69,7 @@ public function extract($path, array $files = array()) {
    * {@inheritdoc}
    */
   public function listContents() {
-    $files = array();
+    $files = [];
     for ($i = 0; $i < $this->zip->numFiles; $i++) {
       $files[] = $this->zip->getNameIndex($i);
     }
diff --git a/core/lib/Drupal/Core/Asset/CssCollectionGrouper.php b/core/lib/Drupal/Core/Asset/CssCollectionGrouper.php
index 2c4122d58f78924bac9e7bb1ba863e5ef812c4c9..4dedfa6b3b28118fc15dc7d50f9f9dbda3cfe61b 100644
--- a/core/lib/Drupal/Core/Asset/CssCollectionGrouper.php
+++ b/core/lib/Drupal/Core/Asset/CssCollectionGrouper.php
@@ -20,7 +20,7 @@ class CssCollectionGrouper implements AssetCollectionGrouperInterface {
    * type, media, and browsers, if needed to accommodate other items in between.
    */
   public function group(array $css_assets) {
-    $groups = array();
+    $groups = [];
     // If a group can contain multiple items, we track the information that must
     // be the same for each item in the group, so that when we iterate the next
     // item, we can determine if it can be put into the current group, or if a
@@ -52,7 +52,7 @@ public function group(array $css_assets) {
           // Group file items if their 'preprocess' flag is TRUE.
           // Help ensure maximum reuse of aggregate files by only grouping
           // together items that share the same 'group' value.
-          $group_keys = $item['preprocess'] ? array($item['type'], $item['group'], $item['media'], $item['browsers']) : FALSE;
+          $group_keys = $item['preprocess'] ? [$item['type'], $item['group'], $item['media'], $item['browsers']] : FALSE;
           break;
 
         case 'external':
@@ -71,7 +71,7 @@ public function group(array $css_assets) {
         // the group.
         $groups[$i] = $item;
         unset($groups[$i]['data'], $groups[$i]['weight'], $groups[$i]['basename']);
-        $groups[$i]['items'] = array();
+        $groups[$i]['items'] = [];
         $current_group_keys = $group_keys ? $group_keys : NULL;
       }
 
diff --git a/core/lib/Drupal/Core/Asset/CssCollectionOptimizer.php b/core/lib/Drupal/Core/Asset/CssCollectionOptimizer.php
index eb47cb2c593c50d58bed3697536cab7e6343ea33..5f23af49793be54c30aac1a09a11a2a547887f85 100644
--- a/core/lib/Drupal/Core/Asset/CssCollectionOptimizer.php
+++ b/core/lib/Drupal/Core/Asset/CssCollectionOptimizer.php
@@ -80,8 +80,8 @@ public function optimize(array $css_assets) {
     // Drupal contrib can override this default CSS aggregator to keep the same
     // grouping, optimizing and dumping, but change the strategy that is used to
     // determine when the aggregate should be rebuilt (e.g. mtime, HTTPS …).
-    $map = $this->state->get('drupal_css_cache_files') ?: array();
-    $css_assets = array();
+    $map = $this->state->get('drupal_css_cache_files') ?: [];
+    $css_assets = [];
     foreach ($css_groups as $order => $css_group) {
       // We have to return a single asset, not a group of assets. It is now up
       // to one of the pieces of code in the switch statement below to set the
@@ -155,7 +155,7 @@ public function optimize(array $css_assets) {
    *   A hash to uniquely identify the given group of CSS assets.
    */
   protected function generateHash(array $css_group) {
-    $css_data = array();
+    $css_data = [];
     foreach ($css_group['items'] as $css_file) {
       $css_data[] = $css_file['data'];
     }
@@ -181,7 +181,7 @@ public function deleteAll() {
         file_unmanaged_delete($uri);
       }
     };
-    file_scan_directory('public://css', '/.*/', array('callback' => $delete_stale));
+    file_scan_directory('public://css', '/.*/', ['callback' => $delete_stale]);
   }
 
 }
diff --git a/core/lib/Drupal/Core/Asset/CssCollectionRenderer.php b/core/lib/Drupal/Core/Asset/CssCollectionRenderer.php
index 63721e65ffe121e6e215d5959641ab9fcca87f1e..c3c83e11923ab19fbc2c62b18b88f8878790ea28 100644
--- a/core/lib/Drupal/Core/Asset/CssCollectionRenderer.php
+++ b/core/lib/Drupal/Core/Asset/CssCollectionRenderer.php
@@ -74,7 +74,7 @@ public function __construct(StateInterface $state) {
    * {@inheritdoc}
    */
   public function render(array $css_assets) {
-    $elements = array();
+    $elements = [];
 
     // A dummy query-string is added to filenames, to gain control over
     // browser-caching. The string changes on every update or full cache
@@ -83,22 +83,22 @@ public function render(array $css_assets) {
     $query_string = $this->state->get('system.css_js_query_string') ?: '0';
 
     // Defaults for LINK and STYLE elements.
-    $link_element_defaults = array(
+    $link_element_defaults = [
       '#type' => 'html_tag',
       '#tag' => 'link',
-      '#attributes' => array(
+      '#attributes' => [
         'rel' => 'stylesheet',
-      ),
-    );
-    $style_element_defaults = array(
+      ],
+    ];
+    $style_element_defaults = [
       '#type' => 'html_tag',
       '#tag' => 'style',
-    );
+    ];
 
     // For filthy IE hack.
     $current_ie_group_keys = NULL;
     $get_ie_group_key = function ($css_asset) {
-      return array($css_asset['type'], $css_asset['preprocess'], $css_asset['group'], $css_asset['media'], $css_asset['browsers']);
+      return [$css_asset['type'], $css_asset['preprocess'], $css_asset['group'], $css_asset['media'], $css_asset['browsers']];
     };
 
     // Loop through all CSS assets, by key, to allow for the special IE
@@ -151,7 +151,7 @@ public function render(array $css_assets) {
             // The file CSS asset can be aggregated, but hasn't been: combine
             // multiple items into as few STYLE tags as possible.
             else {
-              $import = array();
+              $import = [];
               // Start with the current CSS asset, iterate over subsequent CSS
               // assets and find which ones have the same 'type', 'group',
               // 'preprocess', 'media' and 'browsers' properties.
diff --git a/core/lib/Drupal/Core/Asset/CssOptimizer.php b/core/lib/Drupal/Core/Asset/CssOptimizer.php
index d25fb8345a9bcf1bd394759d0d88c78b0803e859..4ad7ba134ccaece993076f328c096c2987a512e9 100644
--- a/core/lib/Drupal/Core/Asset/CssOptimizer.php
+++ b/core/lib/Drupal/Core/Asset/CssOptimizer.php
@@ -61,7 +61,7 @@ protected function processFile($css_asset) {
     $this->rewriteFileURIBasePath = $css_base_path . '/';
 
     // Anchor all paths in the CSS with its base URL, ignoring external and absolute paths.
-    return preg_replace_callback('/url\(\s*[\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\s*\)/i', array($this, 'rewriteFileURI'), $contents);
+    return preg_replace_callback('/url\(\s*[\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\s*\)/i', [$this, 'rewriteFileURI'], $contents);
   }
 
   /**
@@ -230,7 +230,7 @@ protected function processCss($contents, $optimize = FALSE) {
 
     // Replaces @import commands with the actual stylesheet content.
     // This happens recursively but omits external files.
-    $contents = preg_replace_callback('/@import\s*(?:url\(\s*)?[\'"]?(?![a-z]+:)(?!\/\/)([^\'"\()]+)[\'"]?\s*\)?\s*;/', array($this, 'loadNestedFile'), $contents);
+    $contents = preg_replace_callback('/@import\s*(?:url\(\s*)?[\'"]?(?![a-z]+:)(?!\/\/)([^\'"\()]+)[\'"]?\s*\)?\s*;/', [$this, 'loadNestedFile'], $contents);
 
     return $contents;
   }
diff --git a/core/lib/Drupal/Core/Asset/JsCollectionGrouper.php b/core/lib/Drupal/Core/Asset/JsCollectionGrouper.php
index 710e3c0b986a78f689a3f9f9f070b5a15811b2a4..9d29c40f26895534b6722c2547393262ef6b9065 100644
--- a/core/lib/Drupal/Core/Asset/JsCollectionGrouper.php
+++ b/core/lib/Drupal/Core/Asset/JsCollectionGrouper.php
@@ -19,7 +19,7 @@ class JsCollectionGrouper implements AssetCollectionGrouperInterface {
    * type and browsers, if needed to accommodate other items in between.
    */
   public function group(array $js_assets) {
-    $groups = array();
+    $groups = [];
     // If a group can contain multiple items, we track the information that must
     // be the same for each item in the group, so that when we iterate the next
     // item, we can determine if it can be put into the current group, or if a
@@ -38,7 +38,7 @@ public function group(array $js_assets) {
           // Group file items if their 'preprocess' flag is TRUE.
           // Help ensure maximum reuse of aggregate files by only grouping
           // together items that share the same 'group' value.
-          $group_keys = $item['preprocess'] ? array($item['type'], $item['group'], $item['browsers']) : FALSE;
+          $group_keys = $item['preprocess'] ? [$item['type'], $item['group'], $item['browsers']] : FALSE;
           break;
 
         case 'external':
@@ -56,7 +56,7 @@ public function group(array $js_assets) {
         // unique to the item and should not be carried over to the group.
         $groups[$index] = $item;
         unset($groups[$index]['data'], $groups[$index]['weight']);
-        $groups[$index]['items'] = array();
+        $groups[$index]['items'] = [];
         $current_group_keys = $group_keys ? $group_keys : NULL;
       }
 
diff --git a/core/lib/Drupal/Core/Asset/JsCollectionOptimizer.php b/core/lib/Drupal/Core/Asset/JsCollectionOptimizer.php
index 566722dfb6c9d1e357029f25cf93a1fc05626a45..4d49d87b4d81a41166fe74a61f7fa4b1e0c8dacf 100644
--- a/core/lib/Drupal/Core/Asset/JsCollectionOptimizer.php
+++ b/core/lib/Drupal/Core/Asset/JsCollectionOptimizer.php
@@ -81,8 +81,8 @@ public function optimize(array $js_assets) {
     // Drupal contrib can override this default JS aggregator to keep the same
     // grouping, optimizing and dumping, but change the strategy that is used to
     // determine when the aggregate should be rebuilt (e.g. mtime, HTTPS …).
-    $map = $this->state->get('system.js_cache_files') ?: array();
-    $js_assets = array();
+    $map = $this->state->get('system.js_cache_files') ?: [];
+    $js_assets = [];
     foreach ($js_groups as $order => $js_group) {
       // We have to return a single asset, not a group of assets. It is now up
       // to one of the pieces of code in the switch statement below to set the
@@ -159,7 +159,7 @@ public function optimize(array $js_assets) {
    *   A hash to uniquely identify the given group of JavaScript assets.
    */
   protected function generateHash(array $js_group) {
-    $js_data = array();
+    $js_data = [];
     foreach ($js_group['items'] as $js_file) {
       $js_data[] = $js_file['data'];
     }
@@ -184,7 +184,7 @@ public function deleteAll() {
         file_unmanaged_delete($uri);
       }
     };
-    file_scan_directory('public://js', '/.*/', array('callback' => $delete_stale));
+    file_scan_directory('public://js', '/.*/', ['callback' => $delete_stale]);
   }
 
 }
diff --git a/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php b/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php
index 2e47d0f3d506e049cb30962ee8f06fedb4bdf604..d3a062c942799a6943ab0e82024e0d009ac34fde 100644
--- a/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php
+++ b/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php
@@ -37,7 +37,7 @@ public function __construct(StateInterface $state) {
    * logic for grouping and aggregating files.
    */
   public function render(array $js_assets) {
-    $elements = array();
+    $elements = [];
 
     // A dummy query-string is added to filenames, to gain control over
     // browser-caching. The string changes on every update or full cache
@@ -47,11 +47,11 @@ public function render(array $js_assets) {
     $default_query_string = $this->state->get('system.css_js_query_string') ?: '0';
 
     // Defaults for each SCRIPT element.
-    $element_defaults = array(
+    $element_defaults = [
       '#type' => 'html_tag',
       '#tag' => 'script',
       '#value' => '',
-    );
+    ];
 
     // Loop through all JS assets.
     foreach ($js_assets as $js_asset) {
@@ -62,12 +62,12 @@ public function render(array $js_assets) {
       // Element properties that depend on item type.
       switch ($js_asset['type']) {
         case 'setting':
-          $element['#attributes'] = array(
+          $element['#attributes'] = [
             // This type attribute prevents this from being parsed as an
             // inline script.
             'type' => 'application/json',
             'data-drupal-selector' => 'drupal-settings-json',
-          );
+          ];
           $element['#value'] = Json::encode($js_asset['data']);
           break;
 
diff --git a/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php b/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php
index 799ee07f91f7fe4e9dfe64d81bedadfe9d79388e..b4c716d508a037db33c14d14c85e674102260d84 100644
--- a/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php
+++ b/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php
@@ -69,7 +69,7 @@ public function __construct($root, ModuleHandlerInterface $module_handler, Theme
    *   Thrown when a js file defines a positive weight.
    */
   public function buildByExtension($extension) {
-    $libraries = array();
+    $libraries = [];
 
     if ($extension === 'core') {
       $path = 'core';
@@ -92,7 +92,7 @@ public function buildByExtension($extension) {
       if (!isset($library['js']) && !isset($library['css']) && !isset($library['drupalSettings'])) {
         throw new IncompleteLibraryDefinitionException(sprintf("Incomplete library definition for definition '%s' in extension '%s'", $id, $extension));
       }
-      $library += array('dependencies' => array(), 'js' => array(), 'css' => array());
+      $library += ['dependencies' => [], 'js' => [], 'css' => []];
 
       if (isset($library['header']) && !is_bool($library['header'])) {
         throw new \LogicException(sprintf("The 'header' key in the library definition '%s' in extension '%s' is invalid: it must be a boolean.", $id, $extension));
@@ -116,14 +116,14 @@ public function buildByExtension($extension) {
 
       // Assign Drupal's license to libraries that don't have license info.
       if (!isset($library['license'])) {
-        $library['license'] = array(
+        $library['license'] = [
           'name' => 'GNU-GPL-2.0-or-later',
           'url' => 'https://www.drupal.org/licensing/faq',
           'gpl-compatible' => TRUE,
-        );
+        ];
       }
 
-      foreach (array('js', 'css') as $type) {
+      foreach (['js', 'css'] as $type) {
         // Prepare (flatten) the SMACSS-categorized definitions.
         // @todo After Asset(ic) changes, retain the definitions as-is and
         //   properly resolve dependencies for all (css) libraries per category,
@@ -145,7 +145,7 @@ public function buildByExtension($extension) {
           unset($library[$type][$source]);
           // Allow to omit the options hashmap in YAML declarations.
           if (!is_array($options)) {
-            $options = array();
+            $options = [];
           }
           if ($type == 'js' && isset($options['weight']) && $options['weight'] > 0) {
             throw new \UnexpectedValueException("The $extension/$id library defines a positive weight for '$source'. Only negative weights are allowed (but should be avoided). Instead of a positive weight, specify accurate dependencies for this library.");
diff --git a/core/lib/Drupal/Core/Batch/BatchStorage.php b/core/lib/Drupal/Core/Batch/BatchStorage.php
index 789703c3253a77f3bd9fd2bb3fe4e8dd8663aff2..82f5b65767522dcb5e102491aeb3ceba64f0b2a4 100644
--- a/core/lib/Drupal/Core/Batch/BatchStorage.php
+++ b/core/lib/Drupal/Core/Batch/BatchStorage.php
@@ -58,10 +58,10 @@ public function load($id) {
     // Ensure that a session is started before using the CSRF token generator.
     $this->session->start();
     try {
-      $batch = $this->connection->query("SELECT batch FROM {batch} WHERE bid = :bid AND token = :token", array(
+      $batch = $this->connection->query("SELECT batch FROM {batch} WHERE bid = :bid AND token = :token", [
         ':bid' => $id,
         ':token' => $this->csrfToken->get($id),
-      ))->fetchField();
+      ])->fetchField();
     }
     catch (\Exception $e) {
       $this->catchException($e);
@@ -93,7 +93,7 @@ public function delete($id) {
   public function update(array $batch) {
     try {
       $this->connection->update('batch')
-        ->fields(array('batch' => serialize($batch)))
+        ->fields(['batch' => serialize($batch)])
         ->condition('bid', $batch['id'])
         ->execute();
     }
@@ -150,12 +150,12 @@ public function create(array $batch) {
    */
   protected function doCreate(array $batch) {
     $this->connection->insert('batch')
-      ->fields(array(
+      ->fields([
         'bid' => $batch['id'],
         'timestamp' => REQUEST_TIME,
         'token' => $this->csrfToken->get($batch['id']),
         'batch' => serialize($batch),
-      ))
+      ])
       ->execute();
   }
 
diff --git a/core/lib/Drupal/Core/Block/BlockBase.php b/core/lib/Drupal/Core/Block/BlockBase.php
index 4d47afaeef89b78779c107eb975ac36f28549dd3..ee9078335b8bc76e73f2b6e3e0564e38f28be7f7 100644
--- a/core/lib/Drupal/Core/Block/BlockBase.php
+++ b/core/lib/Drupal/Core/Block/BlockBase.php
@@ -82,19 +82,19 @@ public function setConfiguration(array $configuration) {
    *   An associative array with the default configuration.
    */
   protected function baseConfigurationDefaults() {
-    return array(
+    return [
       'id' => $this->getPluginId(),
       'label' => '',
       'provider' => $this->pluginDefinition['provider'],
       'label_display' => static::BLOCK_LABEL_VISIBLE,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array();
+    return [];
   }
 
   /**
@@ -108,7 +108,7 @@ public function setConfigurationValue($key, $value) {
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    return array();
+    return [];
   }
 
   /**
@@ -151,29 +151,29 @@ protected function blockAccess(AccountInterface $account) {
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     $definition = $this->getPluginDefinition();
-    $form['provider'] = array(
+    $form['provider'] = [
       '#type' => 'value',
       '#value' => $definition['provider'],
-    );
+    ];
 
-    $form['admin_label'] = array(
+    $form['admin_label'] = [
       '#type' => 'item',
       '#title' => $this->t('Block description'),
       '#plain_text' => $definition['admin_label'],
-    );
-    $form['label'] = array(
+    ];
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Title'),
       '#maxlength' => 255,
       '#default_value' => $this->label(),
       '#required' => TRUE,
-    );
-    $form['label_display'] = array(
+    ];
+    $form['label_display'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Display title'),
       '#default_value' => ($this->configuration['label_display'] === static::BLOCK_LABEL_VISIBLE),
       '#return_value' => static::BLOCK_LABEL_VISIBLE,
-    );
+    ];
 
     // Add context mapping UI form elements.
     $contexts = $form_state->getTemporaryValue('gathered_contexts') ?: [];
@@ -187,7 +187,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
    * {@inheritdoc}
    */
   public function blockForm($form, FormStateInterface $form_state) {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Block/BlockManager.php b/core/lib/Drupal/Core/Block/BlockManager.php
index 3c88bdcc0823a4a23a8dd3888a3d97cff17014bb..a837340a3c24c60bf2687694254b988181b6979f 100644
--- a/core/lib/Drupal/Core/Block/BlockManager.php
+++ b/core/lib/Drupal/Core/Block/BlockManager.php
@@ -74,7 +74,7 @@ public function getGroupedDefinitions(array $definitions = NULL) {
   /**
    * {@inheritdoc}
    */
-  public function getFallbackPluginId($plugin_id, array $configuration = array()) {
+  public function getFallbackPluginId($plugin_id, array $configuration = []) {
     return 'broken';
   }
 
diff --git a/core/lib/Drupal/Core/Breadcrumb/BreadcrumbManager.php b/core/lib/Drupal/Core/Breadcrumb/BreadcrumbManager.php
index bb651ccf1e988589c57edb16cb1070f805cf3d9d..f418a5ee225480af9cfc7c23d2f24c252cc27d00 100644
--- a/core/lib/Drupal/Core/Breadcrumb/BreadcrumbManager.php
+++ b/core/lib/Drupal/Core/Breadcrumb/BreadcrumbManager.php
@@ -29,7 +29,7 @@ class BreadcrumbManager implements ChainBreadcrumbBuilderInterface {
    *
    * @var array
    */
-  protected $builders = array();
+  protected $builders = [];
 
   /**
    * Holds the array of breadcrumb builders sorted by priority.
@@ -71,7 +71,7 @@ public function applies(RouteMatchInterface $route_match) {
    */
   public function build(RouteMatchInterface $route_match) {
     $breadcrumb = new Breadcrumb();
-    $context = array('builder' => NULL);
+    $context = ['builder' => NULL];
     // Call the build method of registered breadcrumb builders,
     // until one of them returns an array.
     foreach ($this->getSortedBuilders() as $builder) {
@@ -107,7 +107,7 @@ protected function getSortedBuilders() {
       // Sort the builders according to priority.
       krsort($this->builders);
       // Merge nested builders from $this->builders into $this->sortedBuilders.
-      $this->sortedBuilders = array();
+      $this->sortedBuilders = [];
       foreach ($this->builders as $builders) {
         $this->sortedBuilders = array_merge($this->sortedBuilders, $builders);
       }
diff --git a/core/lib/Drupal/Core/Cache/ApcuBackend.php b/core/lib/Drupal/Core/Cache/ApcuBackend.php
index 5338a747af96bcc0eeb18ee7c0837ed4de80aeb2..d7847ffb8d4d6e00b529fc5c4fa207f6ff6e5363 100644
--- a/core/lib/Drupal/Core/Cache/ApcuBackend.php
+++ b/core/lib/Drupal/Core/Cache/ApcuBackend.php
@@ -80,13 +80,13 @@ public function get($cid, $allow_invalid = FALSE) {
    */
   public function getMultiple(&$cids, $allow_invalid = FALSE) {
     // Translate the requested cache item IDs to APCu keys.
-    $map = array();
+    $map = [];
     foreach ($cids as $cid) {
       $map[$this->getApcuKey($cid)] = $cid;
     }
 
     $result = apcu_fetch(array_keys($map));
-    $cache = array();
+    $cache = [];
     if ($result) {
       foreach ($result as $key => $item) {
         $item = $this->prepareItem($item, $allow_invalid);
@@ -140,7 +140,7 @@ protected function prepareItem($cache, $allow_invalid) {
       return FALSE;
     }
 
-    $cache->tags = $cache->tags ? explode(' ', $cache->tags) : array();
+    $cache->tags = $cache->tags ? explode(' ', $cache->tags) : [];
 
     // Check expire time.
     $cache->valid = $cache->expire == Cache::PERMANENT || $cache->expire >= REQUEST_TIME;
@@ -160,7 +160,7 @@ protected function prepareItem($cache, $allow_invalid) {
   /**
    * {@inheritdoc}
    */
-  public function set($cid, $data, $expire = CacheBackendInterface::CACHE_PERMANENT, array $tags = array()) {
+  public function set($cid, $data, $expire = CacheBackendInterface::CACHE_PERMANENT, array $tags = []) {
     assert('\Drupal\Component\Assertion\Inspector::assertAllStrings($tags)', 'Cache tags must be strings.');
     $tags = array_unique($tags);
     $cache = new \stdClass();
@@ -180,9 +180,9 @@ public function set($cid, $data, $expire = CacheBackendInterface::CACHE_PERMANEN
   /**
    * {@inheritdoc}
    */
-  public function setMultiple(array $items = array()) {
+  public function setMultiple(array $items = []) {
     foreach ($items as $cid => $item) {
-      $this->set($cid, $item['data'], isset($item['expire']) ? $item['expire'] : CacheBackendInterface::CACHE_PERMANENT, isset($item['tags']) ? $item['tags'] : array());
+      $this->set($cid, $item['data'], isset($item['expire']) ? $item['expire'] : CacheBackendInterface::CACHE_PERMANENT, isset($item['tags']) ? $item['tags'] : []);
     }
   }
 
@@ -197,7 +197,7 @@ public function delete($cid) {
    * {@inheritdoc}
    */
   public function deleteMultiple(array $cids) {
-    apcu_delete(array_map(array($this, 'getApcuKey'), $cids));
+    apcu_delete(array_map([$this, 'getApcuKey'], $cids));
   }
 
   /**
@@ -225,7 +225,7 @@ public function removeBin() {
    * {@inheritdoc}
    */
   public function invalidate($cid) {
-    $this->invalidateMultiple(array($cid));
+    $this->invalidateMultiple([$cid]);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Cache/BackendChain.php b/core/lib/Drupal/Core/Cache/BackendChain.php
index 851978b2930ecd149102da74e14f367f1e57641a..a8cef19fd543856b37796d66ce6108c647343708 100644
--- a/core/lib/Drupal/Core/Cache/BackendChain.php
+++ b/core/lib/Drupal/Core/Cache/BackendChain.php
@@ -26,7 +26,7 @@ class BackendChain implements CacheBackendInterface, CacheTagsInvalidatorInterfa
    *
    * @var array
    */
-  protected $backends = array();
+  protected $backends = [];
 
   /**
    * Constructs a DatabaseBackend object.
@@ -91,7 +91,7 @@ public function get($cid, $allow_invalid = FALSE) {
    * {@inheritdoc}
    */
   public function getMultiple(&$cids, $allow_invalid = FALSE) {
-    $return = array();
+    $return = [];
 
     foreach ($this->backends as $index => $backend) {
       $items = $backend->getMultiple($cids, $allow_invalid);
@@ -121,7 +121,7 @@ public function getMultiple(&$cids, $allow_invalid = FALSE) {
   /**
    * {@inheritdoc}
    */
-  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {
+  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {
     foreach ($this->backends as $backend) {
       $backend->set($cid, $data, $expire, $tags);
     }
diff --git a/core/lib/Drupal/Core/Cache/Cache.php b/core/lib/Drupal/Core/Cache/Cache.php
index d905132894e621095478ceb307b741a362006e1e..f02a4e7cd718dc0c1c2efe490474a18695b9165d 100644
--- a/core/lib/Drupal/Core/Cache/Cache.php
+++ b/core/lib/Drupal/Core/Cache/Cache.php
@@ -152,7 +152,7 @@ public static function invalidateTags(array $tags) {
    *   An array of cache backend objects keyed by cache bins.
    */
   public static function getBins() {
-    $bins = array();
+    $bins = [];
     $container = \Drupal::getContainer();
     foreach ($container->getParameter('cache_bins') as $service_id => $bin) {
       $bins[$bin] = $container->get($service_id);
@@ -178,7 +178,7 @@ public static function getBins() {
    */
   public static function keyFromQuery(SelectInterface $query) {
     $query->preExecute();
-    $keys = array((string) $query, $query->getArguments());
+    $keys = [(string) $query, $query->getArguments()];
     return hash('sha256', serialize($keys));
   }
 
diff --git a/core/lib/Drupal/Core/Cache/CacheBackendInterface.php b/core/lib/Drupal/Core/Cache/CacheBackendInterface.php
index 68c5b5ab1fb324923fefe691981d2953a90b4b55..a8ce88890a968fe9ad43692a59f9c2b304a34d13 100644
--- a/core/lib/Drupal/Core/Cache/CacheBackendInterface.php
+++ b/core/lib/Drupal/Core/Cache/CacheBackendInterface.php
@@ -96,7 +96,7 @@ public function getMultiple(&$cids, $allow_invalid = FALSE);
    * @see \Drupal\Core\Cache\CacheBackendInterface::get()
    * @see \Drupal\Core\Cache\CacheBackendInterface::getMultiple()
    */
-  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array());
+  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []);
 
   /**
    * Store multiple items in the persistent cache.
diff --git a/core/lib/Drupal/Core/Cache/CacheCollector.php b/core/lib/Drupal/Core/Cache/CacheCollector.php
index 2db46084b5219844b05dfcbe28189d952a54d900..acbbf006a05aa57e189e245c74091ff14675f116 100644
--- a/core/lib/Drupal/Core/Cache/CacheCollector.php
+++ b/core/lib/Drupal/Core/Cache/CacheCollector.php
@@ -56,21 +56,21 @@ abstract class CacheCollector implements CacheCollectorInterface, DestructableIn
    *
    * @var array
    */
-  protected $keysToPersist = array();
+  protected $keysToPersist = [];
 
   /**
    * An array of keys to remove from the cache on service termination.
    *
    * @var array
    */
-  protected $keysToRemove = array();
+  protected $keysToRemove = [];
 
   /**
    * Storage for the data itself.
    *
    * @var array
    */
-  protected $storage = array();
+  protected $storage = [];
 
   /**
    * Stores the cache creation time.
@@ -110,7 +110,7 @@ abstract class CacheCollector implements CacheCollectorInterface, DestructableIn
    * @param array $tags
    *   (optional) The tags to specify for the cache item.
    */
-  public function __construct($cid, CacheBackendInterface $cache, LockBackendInterface $lock, array $tags = array()) {
+  public function __construct($cid, CacheBackendInterface $cache, LockBackendInterface $lock, array $tags = []) {
     assert('\Drupal\Component\Assertion\Inspector::assertAllStrings($tags)', 'Cache tags must be strings.');
     $this->cid = $cid;
     $this->cache = $cache;
@@ -216,7 +216,7 @@ abstract protected function resolveCacheMiss($key);
    *   TRUE.
    */
   protected function updateCache($lock = TRUE) {
-    $data = array();
+    $data = [];
     foreach ($this->keysToPersist as $offset => $persist) {
       if ($persist) {
         $data[$offset] = $this->storage[$offset];
@@ -256,8 +256,8 @@ protected function updateCache($lock = TRUE) {
       }
     }
 
-    $this->keysToPersist = array();
-    $this->keysToRemove = array();
+    $this->keysToPersist = [];
+    $this->keysToRemove = [];
   }
 
   /**
@@ -288,9 +288,9 @@ protected function normalizeLockName($cid) {
    * {@inheritdoc}
    */
   public function reset() {
-    $this->storage = array();
-    $this->keysToPersist = array();
-    $this->keysToRemove = array();
+    $this->storage = [];
+    $this->keysToPersist = [];
+    $this->keysToRemove = [];
     $this->cacheLoaded = FALSE;
   }
 
diff --git a/core/lib/Drupal/Core/Cache/CacheFactory.php b/core/lib/Drupal/Core/Cache/CacheFactory.php
index d9b39e4f4862d7a542979317b58a01c7a0611cdf..d029cc1fe6265d4b1a47bb70f215ae5b2adb42b9 100644
--- a/core/lib/Drupal/Core/Cache/CacheFactory.php
+++ b/core/lib/Drupal/Core/Cache/CacheFactory.php
@@ -42,7 +42,7 @@ class CacheFactory implements CacheFactoryInterface, ContainerAwareInterface {
    *   (optional) A mapping of bin to backend service name. Mappings in
    *   $settings take precedence over this.
    */
-  public function __construct(Settings $settings, array $default_bin_backends = array()) {
+  public function __construct(Settings $settings, array $default_bin_backends = []) {
     $this->settings = $settings;
     $this->defaultBinBackends = $default_bin_backends;
   }
diff --git a/core/lib/Drupal/Core/Cache/CacheTagsInvalidator.php b/core/lib/Drupal/Core/Cache/CacheTagsInvalidator.php
index cfc64f2a9ee42fef26f79cedbed86b793157c2d4..ceb8f49e88f518571926ec51b2f23e7f8a14d6bc 100644
--- a/core/lib/Drupal/Core/Cache/CacheTagsInvalidator.php
+++ b/core/lib/Drupal/Core/Cache/CacheTagsInvalidator.php
@@ -16,7 +16,7 @@ class CacheTagsInvalidator implements CacheTagsInvalidatorInterface {
    *
    * @var \Drupal\Core\Cache\CacheTagsInvalidatorInterface[]
    */
-  protected $invalidators = array();
+  protected $invalidators = [];
 
   /**
    * {@inheritdoc}
@@ -66,7 +66,7 @@ public function addInvalidator(CacheTagsInvalidatorInterface $invalidator) {
    *   interface, keyed by their cache bin.
    */
   protected function getInvalidatorCacheBins() {
-    $bins = array();
+    $bins = [];
     foreach ($this->container->getParameter('cache_bins') as $service_id => $bin) {
       $service = $this->container->get($service_id);
       if ($service instanceof CacheTagsInvalidatorInterface) {
diff --git a/core/lib/Drupal/Core/Cache/ChainedFastBackend.php b/core/lib/Drupal/Core/Cache/ChainedFastBackend.php
index 62839c2b0e196282ae2c1189903b18a2f6061945..9f6be9d8ab8167194287712cb335a4f3b692b35f 100644
--- a/core/lib/Drupal/Core/Cache/ChainedFastBackend.php
+++ b/core/lib/Drupal/Core/Cache/ChainedFastBackend.php
@@ -99,7 +99,7 @@ public function __construct(CacheBackendInterface $consistent_backend, CacheBack
    * {@inheritdoc}
    */
   public function get($cid, $allow_invalid = FALSE) {
-    $cids = array($cid);
+    $cids = [$cid];
     $cache = $this->getMultiple($cids, $allow_invalid);
     return reset($cache);
   }
@@ -109,7 +109,7 @@ public function get($cid, $allow_invalid = FALSE) {
    */
   public function getMultiple(&$cids, $allow_invalid = FALSE) {
     $cids_copy = $cids;
-    $cache = array();
+    $cache = [];
 
     // If we can determine the time at which the last write to the consistent
     // backend occurred (we might not be able to if it has been recently
@@ -142,7 +142,7 @@ public function getMultiple(&$cids, $allow_invalid = FALSE) {
       }
       catch (\Exception $e) {
         $cids = $cids_copy;
-        $items = array();
+        $items = [];
       }
 
       // Even if items were successfully fetched from the fast backend, they
@@ -176,7 +176,7 @@ public function getMultiple(&$cids, $allow_invalid = FALSE) {
   /**
    * {@inheritdoc}
    */
-  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {
+  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {
     $this->consistentBackend->set($cid, $data, $expire, $tags);
     $this->markAsOutdated();
     // Don't write the cache tags to the fast backend as any cache tag
@@ -202,7 +202,7 @@ public function setMultiple(array $items) {
    * {@inheritdoc}
    */
   public function delete($cid) {
-    $this->consistentBackend->deleteMultiple(array($cid));
+    $this->consistentBackend->deleteMultiple([$cid]);
     $this->markAsOutdated();
   }
 
@@ -226,7 +226,7 @@ public function deleteAll() {
    * {@inheritdoc}
    */
   public function invalidate($cid) {
-    $this->invalidateMultiple(array($cid));
+    $this->invalidateMultiple([$cid]);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Cache/ChainedFastBackendFactory.php b/core/lib/Drupal/Core/Cache/ChainedFastBackendFactory.php
index 00dc9b513e38b7d6dd5926269cb4a9bffd5b24c5..e4da328a9f0cbd6ad1ba69515ba4bf7a5ac8d825 100644
--- a/core/lib/Drupal/Core/Cache/ChainedFastBackendFactory.php
+++ b/core/lib/Drupal/Core/Cache/ChainedFastBackendFactory.php
@@ -43,7 +43,7 @@ class ChainedFastBackendFactory implements CacheFactoryInterface {
   public function __construct(Settings $settings = NULL, $consistent_service_name = NULL, $fast_service_name = NULL) {
     // Default the consistent backend to the site's default backend.
     if (!isset($consistent_service_name)) {
-      $cache_settings = isset($settings) ? $settings->get('cache') : array();
+      $cache_settings = isset($settings) ? $settings->get('cache') : [];
       $consistent_service_name = isset($cache_settings['default']) ? $cache_settings['default'] : 'cache.backend.database';
     }
 
diff --git a/core/lib/Drupal/Core/Cache/Context/CacheContextsManager.php b/core/lib/Drupal/Core/Cache/Context/CacheContextsManager.php
index 0e89fb9d43b8f2534b36c1579e682c8d74c06fb6..9a555f8bf1aa8a9b27e855eaebd0960d85d8b6ae 100644
--- a/core/lib/Drupal/Core/Cache/Context/CacheContextsManager.php
+++ b/core/lib/Drupal/Core/Cache/Context/CacheContextsManager.php
@@ -71,7 +71,7 @@ public function getAll() {
    *   An array of available cache contexts and corresponding labels.
    */
   public function getLabels($include_calculated_cache_contexts = FALSE) {
-    $with_labels = array();
+    $with_labels = [];
     foreach ($this->contexts as $context) {
       $service = $this->getService($context);
       if (!$include_calculated_cache_contexts && $service instanceof CalculatedCacheContextInterface) {
diff --git a/core/lib/Drupal/Core/Cache/Context/LanguagesCacheContext.php b/core/lib/Drupal/Core/Cache/Context/LanguagesCacheContext.php
index a13b763fa069a40eb70232872b935aa5dd54f746..952dc14adbf956d53fc6f441cd982785f94c4b16 100644
--- a/core/lib/Drupal/Core/Cache/Context/LanguagesCacheContext.php
+++ b/core/lib/Drupal/Core/Cache/Context/LanguagesCacheContext.php
@@ -50,7 +50,7 @@ public static function getLabel() {
    */
   public function getContext($type = NULL) {
     if ($type === NULL) {
-      $context_parts = array();
+      $context_parts = [];
       if ($this->languageManager->isMultilingual()) {
         foreach ($this->languageManager->getLanguageTypes() as $type) {
           $context_parts[] = $this->languageManager->getCurrentLanguage($type)->getId();
diff --git a/core/lib/Drupal/Core/Cache/DatabaseBackend.php b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
index a96d1834723c982f1d88758e5bc6d5dfecce47df..d53c51c2fc8fb22df1d9a2bfd5048239b35d1281 100644
--- a/core/lib/Drupal/Core/Cache/DatabaseBackend.php
+++ b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
@@ -59,7 +59,7 @@ public function __construct(Connection $connection, CacheTagsChecksumInterface $
    * {@inheritdoc}
    */
   public function get($cid, $allow_invalid = FALSE) {
-    $cids = array($cid);
+    $cids = [$cid];
     $cache = $this->getMultiple($cids, $allow_invalid);
     return reset($cache);
   }
@@ -68,7 +68,7 @@ public function get($cid, $allow_invalid = FALSE) {
    * {@inheritdoc}
    */
   public function getMultiple(&$cids, $allow_invalid = FALSE) {
-    $cid_mapping = array();
+    $cid_mapping = [];
     foreach ($cids as $cid) {
       $cid_mapping[$this->normalizeCid($cid)] = $cid;
     }
@@ -79,14 +79,14 @@ public function getMultiple(&$cids, $allow_invalid = FALSE) {
     // is used here only due to the performance overhead we would incur
     // otherwise. When serving an uncached page, the overhead of using
     // ::select() is a much smaller proportion of the request.
-    $result = array();
+    $result = [];
     try {
-      $result = $this->connection->query('SELECT cid, data, created, expire, serialized, tags, checksum FROM {' . $this->connection->escapeTable($this->bin) . '} WHERE cid IN ( :cids[] ) ORDER BY cid', array(':cids[]' => array_keys($cid_mapping)));
+      $result = $this->connection->query('SELECT cid, data, created, expire, serialized, tags, checksum FROM {' . $this->connection->escapeTable($this->bin) . '} WHERE cid IN ( :cids[] ) ORDER BY cid', [':cids[]' => array_keys($cid_mapping)]);
     }
     catch (\Exception $e) {
       // Nothing to do.
     }
-    $cache = array();
+    $cache = [];
     foreach ($result as $item) {
       // Map the cache ID back to the original.
       $item->cid = $cid_mapping[$item->cid];
@@ -119,7 +119,7 @@ protected function prepareItem($cache, $allow_invalid) {
       return FALSE;
     }
 
-    $cache->tags = $cache->tags ? explode(' ', $cache->tags) : array();
+    $cache->tags = $cache->tags ? explode(' ', $cache->tags) : [];
 
     // Check expire time.
     $cache->valid = $cache->expire == Cache::PERMANENT || $cache->expire >= REQUEST_TIME;
@@ -144,7 +144,7 @@ protected function prepareItem($cache, $allow_invalid) {
   /**
    * {@inheritdoc}
    */
-  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {
+  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {
     $this->setMultiple([
       $cid => [
         'data' => $data,
@@ -186,26 +186,26 @@ public function setMultiple(array $items) {
    * @see \Drupal\Core\Cache\CacheBackendInterface::setMultiple()
    */
   protected function doSetMultiple(array $items) {
-    $values = array();
+    $values = [];
 
     foreach ($items as $cid => $item) {
-      $item += array(
+      $item += [
         'expire' => CacheBackendInterface::CACHE_PERMANENT,
-        'tags' => array(),
-      );
+        'tags' => [],
+      ];
 
       assert('\Drupal\Component\Assertion\Inspector::assertAllStrings($item[\'tags\'])', 'Cache Tags must be strings.');
       $item['tags'] = array_unique($item['tags']);
       // Sort the cache tags so that they are stored consistently in the DB.
       sort($item['tags']);
 
-      $fields = array(
+      $fields = [
         'cid' => $this->normalizeCid($cid),
         'expire' => $item['expire'],
         'created' => round(microtime(TRUE), 3),
         'tags' => implode(' ', $item['tags']),
         'checksum' => $this->checksumProvider->getCurrentChecksum($item['tags']),
-      );
+      ];
 
       if (!is_string($item['data'])) {
         $fields['data'] = serialize($item['data']);
@@ -223,7 +223,7 @@ protected function doSetMultiple(array $items) {
     $query = $this->connection
       ->upsert($this->bin)
       ->key('cid')
-      ->fields(array('cid', 'expire', 'created', 'tags', 'checksum', 'data', 'serialized'));
+      ->fields(['cid', 'expire', 'created', 'tags', 'checksum', 'data', 'serialized']);
     foreach ($values as $fields) {
       // Only pass the values since the order of $fields matches the order of
       // the insert fields. This is a performance optimization to avoid
@@ -238,14 +238,14 @@ protected function doSetMultiple(array $items) {
    * {@inheritdoc}
    */
   public function delete($cid) {
-    $this->deleteMultiple(array($cid));
+    $this->deleteMultiple([$cid]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function deleteMultiple(array $cids) {
-    $cids = array_values(array_map(array($this, 'normalizeCid'), $cids));
+    $cids = array_values(array_map([$this, 'normalizeCid'], $cids));
     try {
       // Delete in chunks when a large array is passed.
       foreach (array_chunk($cids, 1000) as $cids_chunk) {
@@ -285,19 +285,19 @@ public function deleteAll() {
    * {@inheritdoc}
    */
   public function invalidate($cid) {
-    $this->invalidateMultiple(array($cid));
+    $this->invalidateMultiple([$cid]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function invalidateMultiple(array $cids) {
-    $cids = array_values(array_map(array($this, 'normalizeCid'), $cids));
+    $cids = array_values(array_map([$this, 'normalizeCid'], $cids));
     try {
       // Update in chunks when a large array is passed.
       foreach (array_chunk($cids, 1000) as $cids_chunk) {
         $this->connection->update($this->bin)
-          ->fields(array('expire' => REQUEST_TIME - 1))
+          ->fields(['expire' => REQUEST_TIME - 1])
           ->condition('cid', $cids_chunk, 'IN')
           ->execute();
       }
@@ -313,7 +313,7 @@ public function invalidateMultiple(array $cids) {
   public function invalidateAll() {
     try {
       $this->connection->update($this->bin)
-        ->fields(array('expire' => REQUEST_TIME - 1))
+        ->fields(['expire' => REQUEST_TIME - 1])
         ->execute();
     }
     catch (\Exception $e) {
@@ -419,62 +419,62 @@ protected function normalizeCid($cid) {
    * Defines the schema for the {cache_*} bin tables.
    */
   public function schemaDefinition() {
-    $schema = array(
+    $schema = [
       'description' => 'Storage for the cache API.',
-      'fields' => array(
-        'cid' => array(
+      'fields' => [
+        'cid' => [
           'description' => 'Primary Key: Unique cache ID.',
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
           'binary' => TRUE,
-        ),
-        'data' => array(
+        ],
+        'data' => [
           'description' => 'A collection of data to cache.',
           'type' => 'blob',
           'not null' => FALSE,
           'size' => 'big',
-        ),
-        'expire' => array(
+        ],
+        'expire' => [
           'description' => 'A Unix timestamp indicating when the cache entry should expire, or ' . Cache::PERMANENT . ' for never.',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'created' => array(
+        ],
+        'created' => [
           'description' => 'A timestamp with millisecond precision indicating when the cache entry was created.',
           'type' => 'numeric',
           'precision' => 14,
           'scale' => 3,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'serialized' => array(
+        ],
+        'serialized' => [
           'description' => 'A flag to indicate whether content is serialized (1) or not (0).',
           'type' => 'int',
           'size' => 'small',
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'tags' => array(
+        ],
+        'tags' => [
           'description' => 'Space-separated list of cache tags for this entry.',
           'type' => 'text',
           'size' => 'big',
           'not null' => FALSE,
-        ),
-        'checksum' => array(
+        ],
+        'checksum' => [
           'description' => 'The tag invalidation checksum when this entry was saved.',
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
-        ),
-      ),
-      'indexes' => array(
-        'expire' => array('expire'),
-      ),
-      'primary key' => array('cid'),
-    );
+        ],
+      ],
+      'indexes' => [
+        'expire' => ['expire'],
+      ],
+      'primary key' => ['cid'],
+    ];
     return $schema;
   }
 
diff --git a/core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php b/core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php
index a133d88f6ab4d6f3c7c2725b088ea21c2848202a..450b4411a17bdc73fd0aa9e0d91b2dfdcc2a67d2 100644
--- a/core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php
+++ b/core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php
@@ -22,7 +22,7 @@ class DatabaseCacheTagsChecksum implements CacheTagsChecksumInterface, CacheTags
    *
    * @var array
    */
-  protected $tagCache = array();
+  protected $tagCache = [];
 
   /**
    * A list of tags that have already been invalidated in this request.
@@ -31,7 +31,7 @@ class DatabaseCacheTagsChecksum implements CacheTagsChecksumInterface, CacheTags
    *
    * @var array
    */
-  protected $invalidatedTags = array();
+  protected $invalidatedTags = [];
 
   /**
    * Constructs a DatabaseCacheTagsChecksum object.
@@ -56,7 +56,7 @@ public function invalidateTags(array $tags) {
         $this->invalidatedTags[$tag] = TRUE;
         unset($this->tagCache[$tag]);
         $this->connection->merge('cachetags')
-          ->insertFields(array('invalidations' => 1))
+          ->insertFields(['invalidations' => 1])
           ->expression('invalidations', 'invalidations + 1')
           ->key('tag', $tag)
           ->execute();
@@ -107,9 +107,9 @@ protected function calculateChecksum(array $tags) {
 
     $query_tags = array_diff($tags, array_keys($this->tagCache));
     if ($query_tags) {
-      $db_tags = array();
+      $db_tags = [];
       try {
-        $db_tags = $this->connection->query('SELECT tag, invalidations FROM {cachetags} WHERE tag IN ( :tags[] )', array(':tags[]' => $query_tags))
+        $db_tags = $this->connection->query('SELECT tag, invalidations FROM {cachetags} WHERE tag IN ( :tags[] )', [':tags[]' => $query_tags])
           ->fetchAllKeyed();
         $this->tagCache += $db_tags;
       }
@@ -134,8 +134,8 @@ protected function calculateChecksum(array $tags) {
    * {@inheritdoc}
    */
   public function reset() {
-    $this->tagCache = array();
-    $this->invalidatedTags = array();
+    $this->tagCache = [];
+    $this->invalidatedTags = [];
   }
 
   /**
@@ -165,25 +165,25 @@ protected function ensureTableExists() {
    * Defines the schema for the {cachetags} table.
    */
   public function schemaDefinition() {
-    $schema = array(
+    $schema = [
       'description' => 'Cache table for tracking cache tag invalidations.',
-      'fields' => array(
-        'tag' => array(
+      'fields' => [
+        'tag' => [
           'description' => 'Namespace-prefixed tag string.',
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'invalidations' => array(
+        ],
+        'invalidations' => [
           'description' => 'Number incremented when the tag is invalidated.',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
-        ),
-      ),
-      'primary key' => array('tag'),
-    );
+        ],
+      ],
+      'primary key' => ['tag'],
+    ];
     return $schema;
   }
 
diff --git a/core/lib/Drupal/Core/Cache/ListCacheBinsPass.php b/core/lib/Drupal/Core/Cache/ListCacheBinsPass.php
index 27886ace08c973fa013c1a32cd2b6e54c8377020..32bac09c086d3aae00767b1558c599ed5113ced4 100644
--- a/core/lib/Drupal/Core/Cache/ListCacheBinsPass.php
+++ b/core/lib/Drupal/Core/Cache/ListCacheBinsPass.php
@@ -16,8 +16,8 @@ class ListCacheBinsPass implements CompilerPassInterface {
    * Collects the cache bins into the cache_bins parameter.
    */
   public function process(ContainerBuilder $container) {
-    $cache_bins = array();
-    $cache_default_bin_backends = array();
+    $cache_bins = [];
+    $cache_default_bin_backends = [];
     foreach ($container->findTaggedServiceIds('cache.bin') as $id => $attributes) {
       $bin = substr($id, strpos($id, '.') + 1);
       $cache_bins[$id] = $bin;
diff --git a/core/lib/Drupal/Core/Cache/MemoryBackend.php b/core/lib/Drupal/Core/Cache/MemoryBackend.php
index aa2409c7e9caf7aa8228240be1db46e1c4b648a6..76bff41eb5424f54446524c7e4fa484fb34bcd04 100644
--- a/core/lib/Drupal/Core/Cache/MemoryBackend.php
+++ b/core/lib/Drupal/Core/Cache/MemoryBackend.php
@@ -17,7 +17,7 @@ class MemoryBackend implements CacheBackendInterface, CacheTagsInvalidatorInterf
   /**
    * Array to store cache objects.
    */
-  protected $cache = array();
+  protected $cache = [];
 
   /**
    * {@inheritdoc}
@@ -35,7 +35,7 @@ public function get($cid, $allow_invalid = FALSE) {
    * {@inheritdoc}
    */
   public function getMultiple(&$cids, $allow_invalid = FALSE) {
-    $ret = array();
+    $ret = [];
 
     $items = array_intersect_key($this->cache, array_flip($cids));
 
@@ -92,26 +92,26 @@ protected function prepareItem($cache, $allow_invalid) {
   /**
    * {@inheritdoc}
    */
-  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {
+  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {
     assert('\Drupal\Component\Assertion\Inspector::assertAllStrings($tags)', 'Cache Tags must be strings.');
     $tags = array_unique($tags);
     // Sort the cache tags so that they are stored consistently in the database.
     sort($tags);
-    $this->cache[$cid] = (object) array(
+    $this->cache[$cid] = (object) [
       'cid' => $cid,
       'data' => serialize($data),
       'created' => $this->getRequestTime(),
       'expire' => $expire,
       'tags' => $tags,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function setMultiple(array $items = array()) {
+  public function setMultiple(array $items = []) {
     foreach ($items as $cid => $item) {
-      $this->set($cid, $item['data'], isset($item['expire']) ? $item['expire'] : CacheBackendInterface::CACHE_PERMANENT, isset($item['tags']) ? $item['tags'] : array());
+      $this->set($cid, $item['data'], isset($item['expire']) ? $item['expire'] : CacheBackendInterface::CACHE_PERMANENT, isset($item['tags']) ? $item['tags'] : []);
     }
   }
 
@@ -133,7 +133,7 @@ public function deleteMultiple(array $cids) {
    * {@inheritdoc}
    */
   public function deleteAll() {
-    $this->cache = array();
+    $this->cache = [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Cache/MemoryBackendFactory.php b/core/lib/Drupal/Core/Cache/MemoryBackendFactory.php
index 4457e5950d99b46dcbfc031e0f425c7bae72d02e..680f850af0543078ff9ddc063b016a4eabb3f2ef 100644
--- a/core/lib/Drupal/Core/Cache/MemoryBackendFactory.php
+++ b/core/lib/Drupal/Core/Cache/MemoryBackendFactory.php
@@ -9,7 +9,7 @@ class MemoryBackendFactory implements CacheFactoryInterface {
    *
    * @var \Drupal\Core\Cache\MemoryBackend[]
    */
-  protected $bins = array();
+  protected $bins = [];
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Cache/MemoryCounterBackend.php b/core/lib/Drupal/Core/Cache/MemoryCounterBackend.php
index 5ec490c5969f73060aa95d2d961a3f2e23fe3ad2..63d20076c6fb0fef4a27ab3067b68fb66a40edff 100644
--- a/core/lib/Drupal/Core/Cache/MemoryCounterBackend.php
+++ b/core/lib/Drupal/Core/Cache/MemoryCounterBackend.php
@@ -17,7 +17,7 @@ class MemoryCounterBackend extends MemoryBackend {
    *
    * @var array
    */
-  protected $counter = array();
+  protected $counter = [];
 
   /**
    * {@inheritdoc}
@@ -30,7 +30,7 @@ public function get($cid, $allow_invalid = FALSE) {
   /**
    * {@inheritdoc}
    */
-  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {
+  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {
     $this->increaseCounter(__FUNCTION__, $cid);
     parent::set($cid, $data, $expire, $tags);
   }
@@ -76,7 +76,7 @@ public function getCounter($method = NULL, $cid = NULL) {
       return isset($this->counter[$method][$cid]) ? $this->counter[$method][$cid] : 0;
     }
     elseif ($method) {
-      return isset($this->counter[$method]) ? $this->counter[$method] : array();
+      return isset($this->counter[$method]) ? $this->counter[$method] : [];
     }
     else {
       return $this->counter;
@@ -87,7 +87,7 @@ public function getCounter($method = NULL, $cid = NULL) {
    * Resets the call counter.
    */
   public function resetCounter() {
-    $this->counter = array();
+    $this->counter = [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Cache/NullBackend.php b/core/lib/Drupal/Core/Cache/NullBackend.php
index fec549f127d492489e2c7e411e2cd5ec826cd233..b0077a50e36444a338773d61441319863c8b2ae0 100644
--- a/core/lib/Drupal/Core/Cache/NullBackend.php
+++ b/core/lib/Drupal/Core/Cache/NullBackend.php
@@ -36,18 +36,18 @@ public function get($cid, $allow_invalid = FALSE) {
    * {@inheritdoc}
    */
   public function getMultiple(&$cids, $allow_invalid = FALSE) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {}
+  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {}
 
   /**
    * {@inheritdoc}
    */
-  public function setMultiple(array $items = array()) {}
+  public function setMultiple(array $items = []) {}
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Cache/PhpBackend.php b/core/lib/Drupal/Core/Cache/PhpBackend.php
index 38f9b9b4b4211228b1838016e82e4ec0a590f234..2404493404f13992d86ad9e12e15cbda67d96a43 100644
--- a/core/lib/Drupal/Core/Cache/PhpBackend.php
+++ b/core/lib/Drupal/Core/Cache/PhpBackend.php
@@ -28,7 +28,7 @@ class PhpBackend implements CacheBackendInterface {
   /**
    * Array to store cache objects.
    */
-  protected $cache = array();
+  protected $cache = [];
 
   /**
    * The cache tags checksum provider.
@@ -83,7 +83,7 @@ protected function getByHash($cidhash, $allow_invalid = FALSE) {
    */
   public function setMultiple(array $items) {
     foreach ($items as $cid => $item) {
-      $this->set($cid, $item['data'], isset($item['expire']) ? $item['expire'] : CacheBackendInterface::CACHE_PERMANENT, isset($item['tags']) ? $item['tags'] : array());
+      $this->set($cid, $item['data'], isset($item['expire']) ? $item['expire'] : CacheBackendInterface::CACHE_PERMANENT, isset($item['tags']) ? $item['tags'] : []);
     }
   }
 
@@ -91,7 +91,7 @@ public function setMultiple(array $items) {
    * {@inheritdoc}
    */
   public function getMultiple(&$cids, $allow_invalid = FALSE) {
-    $ret = array();
+    $ret = [];
 
     foreach ($cids as $cid) {
       if ($item = $this->get($cid, $allow_invalid)) {
@@ -142,16 +142,16 @@ protected function prepareItem($cache, $allow_invalid) {
   /**
    * {@inheritdoc}
    */
-  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {
+  public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {
     assert('\Drupal\Component\Assertion\Inspector::assertAllStrings($tags)', 'Cache Tags must be strings.');
-    $item = (object) array(
+    $item = (object) [
       'cid' => $cid,
       'data' => $data,
       'created' => round(microtime(TRUE), 3),
       'expire' => $expire,
       'tags' => array_unique($tags),
       'checksum' => $this->checksumProvider->getCurrentChecksum($tags),
-    );
+    ];
     $this->writeItem($this->normalizeCid($cid), $item);
   }
 
@@ -226,7 +226,7 @@ public function garbageCollection() {
    * {@inheritdoc}
    */
   public function removeBin() {
-    $this->cache = array();
+    $this->cache = [];
     $this->storage()->deleteAll();
   }
 
diff --git a/core/lib/Drupal/Core/Composer/Composer.php b/core/lib/Drupal/Core/Composer/Composer.php
index b2dc781dbbd00f4cd8c1b52e07bcde6563191498..1ca6262c9b284dcf626c42e0b4594bdf60b2433f 100644
--- a/core/lib/Drupal/Core/Composer/Composer.php
+++ b/core/lib/Drupal/Core/Composer/Composer.php
@@ -84,22 +84,22 @@ public static function preAutoloadDump(Event $event) {
     // Check for our packages, and then optimize them if they're present.
     if ($repository->findPackage('symfony/http-foundation', $constraint)) {
       $autoload = $package->getAutoload();
-      $autoload['classmap'] = array_merge($autoload['classmap'], array(
+      $autoload['classmap'] = array_merge($autoload['classmap'], [
         'vendor/symfony/http-foundation/Request.php',
         'vendor/symfony/http-foundation/ParameterBag.php',
         'vendor/symfony/http-foundation/FileBag.php',
         'vendor/symfony/http-foundation/ServerBag.php',
         'vendor/symfony/http-foundation/HeaderBag.php',
-      ));
+      ]);
       $package->setAutoload($autoload);
     }
     if ($repository->findPackage('symfony/http-kernel', $constraint)) {
       $autoload = $package->getAutoload();
-      $autoload['classmap'] = array_merge($autoload['classmap'], array(
+      $autoload['classmap'] = array_merge($autoload['classmap'], [
         'vendor/symfony/http-kernel/HttpKernel.php',
         'vendor/symfony/http-kernel/HttpKernelInterface.php',
         'vendor/symfony/http-kernel/TerminableInterface.php',
-      ));
+      ]);
       $package->setAutoload($autoload);
     }
   }
diff --git a/core/lib/Drupal/Core/Condition/Annotation/Condition.php b/core/lib/Drupal/Core/Condition/Annotation/Condition.php
index 0959ef7c73cd7ec1f1de276cb9c85a06ce0ada6b..b6686cf6b0b469f1df5f87eebb123390ed7a94eb 100644
--- a/core/lib/Drupal/Core/Condition/Annotation/Condition.php
+++ b/core/lib/Drupal/Core/Condition/Annotation/Condition.php
@@ -55,7 +55,7 @@ class Condition extends Plugin {
    *
    * @var \Drupal\Core\Annotation\ContextDefinition[]
    */
-  public $context = array();
+  public $context = [];
 
   /**
    * The category under which the condition should listed in the UI.
diff --git a/core/lib/Drupal/Core/Condition/ConditionManager.php b/core/lib/Drupal/Core/Condition/ConditionManager.php
index bbe6fe76c80cbdc3a93a1cf0e524aa60f7b2cbbb..2c6b61b6ae8a6a55d261935880792ac0c7dee6b6 100644
--- a/core/lib/Drupal/Core/Condition/ConditionManager.php
+++ b/core/lib/Drupal/Core/Condition/ConditionManager.php
@@ -46,7 +46,7 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $plugin = $this->getFactory()->createInstance($plugin_id, $configuration);
 
     // If we receive any context values via config set it into the plugin.
diff --git a/core/lib/Drupal/Core/Condition/ConditionPluginBase.php b/core/lib/Drupal/Core/Condition/ConditionPluginBase.php
index aaa7ee817c8f2d19e7151adf67a299ba963d5ef8..b5134fb51dae1db1c3dc60b12a67ea5f31433cdc 100644
--- a/core/lib/Drupal/Core/Condition/ConditionPluginBase.php
+++ b/core/lib/Drupal/Core/Condition/ConditionPluginBase.php
@@ -53,11 +53,11 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     }
     $contexts = $form_state->getTemporaryValue('gathered_contexts') ?: [];
     $form['context_mapping'] = $this->addContextAssignmentElement($this, $contexts);
-    $form['negate'] = array(
+    $form['negate'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Negate the condition'),
       '#default_value' => $this->configuration['negate'],
-    );
+    ];
     return $form;
   }
 
@@ -88,9 +88,9 @@ public function execute() {
    * {@inheritdoc}
    */
   public function getConfiguration() {
-    return array(
+    return [
       'id' => $this->getPluginId(),
-    ) + $this->configuration;
+    ] + $this->configuration;
   }
 
   /**
@@ -105,16 +105,16 @@ public function setConfiguration(array $configuration) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'negate' => FALSE,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Condition/ConditionPluginCollection.php b/core/lib/Drupal/Core/Condition/ConditionPluginCollection.php
index 5801ac14e8080a66ac1afe755fa3b43ea6f78610..4d6dd70433480dec28468fdd5e7a200615affb90 100644
--- a/core/lib/Drupal/Core/Condition/ConditionPluginCollection.php
+++ b/core/lib/Drupal/Core/Condition/ConditionPluginCollection.php
@@ -15,7 +15,7 @@ class ConditionPluginCollection extends DefaultLazyPluginCollection {
    *
    * @var \Drupal\Component\Plugin\Context\ContextInterface[]
    */
-  protected $conditionContexts = array();
+  protected $conditionContexts = [];
 
   /**
    * {@inheritdoc}
@@ -33,7 +33,7 @@ public function getConfiguration() {
     $configuration = parent::getConfiguration();
     // Remove configuration if it matches the defaults.
     foreach ($configuration as $instance_id => $instance_config) {
-      $default_config = array();
+      $default_config = [];
       $default_config['id'] = $instance_id;
       $default_config += $this->get($instance_id)->defaultConfiguration();
       // In order to determine if a plugin is configured, we must compare it to
diff --git a/core/lib/Drupal/Core/Config/CachedStorage.php b/core/lib/Drupal/Core/Config/CachedStorage.php
index 363fcd08ed379644438b271dfea36359d5c8358e..7286fbcb3212cd9b70ef4ac8f8eca382dfaa1341 100644
--- a/core/lib/Drupal/Core/Config/CachedStorage.php
+++ b/core/lib/Drupal/Core/Config/CachedStorage.php
@@ -34,7 +34,7 @@ class CachedStorage implements StorageInterface, StorageCacheInterface {
    *
    * @var array
    */
-  protected $findByPrefixCache = array();
+  protected $findByPrefixCache = [];
 
   /**
    * Constructs a new CachedStorage.
@@ -80,7 +80,7 @@ public function read($name) {
    * {@inheritdoc}
    */
   public function readMultiple(array $names) {
-    $data_to_return = array();
+    $data_to_return = [];
 
     $cache_keys_map = $this->getCacheKeys($names);
     $cache_keys = array_values($cache_keys_map);
@@ -95,11 +95,11 @@ public function readMultiple(array $names) {
       $list = $this->storage->readMultiple($names_to_get);
       // Cache configuration objects that were loaded from the storage, cache
       // missing configuration objects as an explicit FALSE.
-      $items = array();
+      $items = [];
       foreach ($names_to_get as $name) {
         $data = isset($list[$name]) ? $list[$name] : FALSE;
         $data_to_return[$name] = $data;
-        $items[$cache_keys_map[$name]] = array('data' => $data);
+        $items[$cache_keys_map[$name]] = ['data' => $data];
       }
 
       $this->cache->setMultiple($items);
@@ -125,7 +125,7 @@ public function write($name, array $data) {
       // While not all written data is read back, setting the cache instead of
       // just deleting it avoids cache rebuild stampedes.
       $this->cache->set($this->getCacheKey($name), $data);
-      $this->findByPrefixCache = array();
+      $this->findByPrefixCache = [];
       return TRUE;
     }
     return FALSE;
@@ -139,7 +139,7 @@ public function delete($name) {
     // rebuilding the cache before the storage is gone.
     if ($this->storage->delete($name)) {
       $this->cache->delete($this->getCacheKey($name));
-      $this->findByPrefixCache = array();
+      $this->findByPrefixCache = [];
       return TRUE;
     }
     return FALSE;
@@ -154,7 +154,7 @@ public function rename($name, $new_name) {
     if ($this->storage->rename($name, $new_name)) {
       $this->cache->delete($this->getCacheKey($name));
       $this->cache->delete($this->getCacheKey($new_name));
-      $this->findByPrefixCache = array();
+      $this->findByPrefixCache = [];
       return TRUE;
     }
     return FALSE;
@@ -227,7 +227,7 @@ public function deleteAll($prefix = '') {
    * Clears the static list cache.
    */
   public function resetListCache() {
-    $this->findByPrefixCache = array();
+    $this->findByPrefixCache = [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/Config.php b/core/lib/Drupal/Core/Config/Config.php
index 0128c66fd598788babbcc92415da2e3c0c4b4e04..584feb7c5375525b9c9c361b9ea3461cbe0fd65c 100644
--- a/core/lib/Drupal/Core/Config/Config.php
+++ b/core/lib/Drupal/Core/Config/Config.php
@@ -155,10 +155,10 @@ public function setModuleOverride(array $data) {
   protected function setOverriddenData() {
     $this->overriddenData = $this->data;
     if (isset($this->moduleOverrides) && is_array($this->moduleOverrides)) {
-      $this->overriddenData = NestedArray::mergeDeepArray(array($this->overriddenData, $this->moduleOverrides), TRUE);
+      $this->overriddenData = NestedArray::mergeDeepArray([$this->overriddenData, $this->moduleOverrides], TRUE);
     }
     if (isset($this->settingsOverrides) && is_array($this->settingsOverrides)) {
-      $this->overriddenData = NestedArray::mergeDeepArray(array($this->overriddenData, $this->settingsOverrides), TRUE);
+      $this->overriddenData = NestedArray::mergeDeepArray([$this->overriddenData, $this->settingsOverrides], TRUE);
     }
     return $this;
   }
@@ -239,7 +239,7 @@ public function save($has_trusted_data = FALSE) {
    *   The configuration object.
    */
   public function delete() {
-    $this->data = array();
+    $this->data = [];
     $this->storage->delete($this->name);
     Cache::invalidateTags($this->getCacheTags());
     $this->isNew = TRUE;
@@ -281,10 +281,10 @@ public function getOriginal($key = '', $apply_overrides = TRUE) {
     if ($apply_overrides) {
       // Apply overrides.
       if (isset($this->moduleOverrides) && is_array($this->moduleOverrides)) {
-        $original_data = NestedArray::mergeDeepArray(array($original_data, $this->moduleOverrides), TRUE);
+        $original_data = NestedArray::mergeDeepArray([$original_data, $this->moduleOverrides], TRUE);
       }
       if (isset($this->settingsOverrides) && is_array($this->settingsOverrides)) {
-        $original_data = NestedArray::mergeDeepArray(array($original_data, $this->settingsOverrides), TRUE);
+        $original_data = NestedArray::mergeDeepArray([$original_data, $this->settingsOverrides], TRUE);
       }
     }
 
diff --git a/core/lib/Drupal/Core/Config/ConfigBase.php b/core/lib/Drupal/Core/Config/ConfigBase.php
index 6dfa962d1b0a2eac8d0e60b7e569c42bfb3e3df6..596ed92156588ee295b93d21ec823bbd44751227 100644
--- a/core/lib/Drupal/Core/Config/ConfigBase.php
+++ b/core/lib/Drupal/Core/Config/ConfigBase.php
@@ -40,7 +40,7 @@ abstract class ConfigBase implements RefinableCacheableDependencyInterface {
    *
    * @var array
    */
-  protected $data = array();
+  protected $data = [];
 
   /**
    * The maximum length of a configuration object name.
@@ -247,7 +247,7 @@ public function clear($key) {
    */
   public function merge(array $data_to_merge) {
     // Preserve integer keys so that configuration keys are not changed.
-    $this->setData(NestedArray::mergeDeepArray(array($this->data, $data_to_merge), TRUE));
+    $this->setData(NestedArray::mergeDeepArray([$this->data, $data_to_merge], TRUE));
     return $this;
   }
 
diff --git a/core/lib/Drupal/Core/Config/ConfigCollectionInfo.php b/core/lib/Drupal/Core/Config/ConfigCollectionInfo.php
index 483c96d2064c59608c05eccc7fa98d22ece5e611..dfdd0b8daff478dbdf6f82dbc7fce1c18802cd7e 100644
--- a/core/lib/Drupal/Core/Config/ConfigCollectionInfo.php
+++ b/core/lib/Drupal/Core/Config/ConfigCollectionInfo.php
@@ -17,7 +17,7 @@ class ConfigCollectionInfo extends Event {
    *
    * @var array
    */
-  protected $collections = array();
+  protected $collections = [];
 
   /**
    * Adds a collection to the list of possible collections.
diff --git a/core/lib/Drupal/Core/Config/ConfigFactory.php b/core/lib/Drupal/Core/Config/ConfigFactory.php
index 1189a4a153650a74f874ecb2b978bba7c06f5c0b..d91bec92e4094c82d61ae6f93d4d76fc08a9bb49 100644
--- a/core/lib/Drupal/Core/Config/ConfigFactory.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactory.php
@@ -43,7 +43,7 @@ class ConfigFactory implements ConfigFactoryInterface, EventSubscriberInterface
    *
    * @var \Drupal\Core\Config\Config[]
    */
-  protected $cache = array();
+  protected $cache = [];
 
   /**
    * The typed config manager.
@@ -57,7 +57,7 @@ class ConfigFactory implements ConfigFactoryInterface, EventSubscriberInterface
    *
    * @var \Drupal\Core\Config\ConfigFactoryOverrideInterface[]
    */
-  protected $configFactoryOverrides = array();
+  protected $configFactoryOverrides = [];
 
   /**
    * Constructs the Config factory.
@@ -101,7 +101,7 @@ public function get($name) {
    *   A configuration object.
    */
   protected function doGet($name, $immutable = TRUE) {
-    if ($config = $this->doLoadMultiple(array($name), $immutable)) {
+    if ($config = $this->doLoadMultiple([$name], $immutable)) {
       return $config[$name];
     }
     else {
@@ -111,7 +111,7 @@ protected function doGet($name, $immutable = TRUE) {
 
       if ($immutable) {
         // Get and apply any overrides.
-        $overrides = $this->loadOverrides(array($name));
+        $overrides = $this->loadOverrides([$name]);
         if (isset($overrides[$name])) {
           $config->setModuleOverride($overrides[$name]);
         }
@@ -148,7 +148,7 @@ public function loadMultiple(array $names) {
    *   List of successfully loaded configuration objects, keyed by name.
    */
   protected function doLoadMultiple(array $names, $immutable = TRUE) {
-    $list = array();
+    $list = [];
 
     foreach ($names as $key => $name) {
       $cache_key = $this->getConfigCacheKey($name, $immutable);
@@ -161,7 +161,7 @@ protected function doLoadMultiple(array $names, $immutable = TRUE) {
     // Pre-load remaining configuration files.
     if (!empty($names)) {
       // Initialise override information.
-      $module_overrides = array();
+      $module_overrides = [];
       $storage_data = $this->storage->readMultiple($names);
 
       if ($immutable && !empty($storage_data)) {
@@ -202,11 +202,11 @@ protected function doLoadMultiple(array $names, $immutable = TRUE) {
    *   An array of overrides keyed by the configuration object name.
    */
   protected function loadOverrides(array $names) {
-    $overrides = array();
+    $overrides = [];
     foreach ($this->configFactoryOverrides as $override) {
       // Existing overrides take precedence since these will have been added
       // by events with a higher priority.
-      $overrides = NestedArray::mergeDeepArray(array($override->loadOverrides($names), $overrides), TRUE);
+      $overrides = NestedArray::mergeDeepArray([$override->loadOverrides($names), $overrides], TRUE);
     }
     return $overrides;
   }
@@ -236,7 +236,7 @@ public function reset($name = NULL) {
       }
     }
     else {
-      $this->cache = array();
+      $this->cache = [];
     }
 
     // Clear the static list cache if supported by the storage.
@@ -317,7 +317,7 @@ protected function getConfigCacheKeys($name) {
    * {@inheritdoc}
    */
   public function clearStaticCache() {
-    $this->cache = array();
+    $this->cache = [];
     return $this;
   }
 
@@ -366,8 +366,8 @@ public function onConfigDelete(ConfigCrudEvent $event) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::SAVE][] = array('onConfigSave', 255);
-    $events[ConfigEvents::DELETE][] = array('onConfigDelete', 255);
+    $events[ConfigEvents::SAVE][] = ['onConfigSave', 255];
+    $events[ConfigEvents::DELETE][] = ['onConfigDelete', 255];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Config/ConfigFactoryOverrideBase.php b/core/lib/Drupal/Core/Config/ConfigFactoryOverrideBase.php
index 79eb29403b40576ce624f128db254fdea2c609c6..3ca16021fca2d62d85ce1ede5d7df7fd6ec937f2 100644
--- a/core/lib/Drupal/Core/Config/ConfigFactoryOverrideBase.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactoryOverrideBase.php
@@ -45,10 +45,10 @@ abstract public function onConfigRename(ConfigRenameEvent $event);
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::COLLECTION_INFO][] = array('addCollections');
-    $events[ConfigEvents::SAVE][] = array('onConfigSave', 20);
-    $events[ConfigEvents::DELETE][] = array('onConfigDelete', 20);
-    $events[ConfigEvents::RENAME][] = array('onConfigRename', 20);
+    $events[ConfigEvents::COLLECTION_INFO][] = ['addCollections'];
+    $events[ConfigEvents::SAVE][] = ['onConfigSave', 20];
+    $events[ConfigEvents::DELETE][] = ['onConfigDelete', 20];
+    $events[ConfigEvents::RENAME][] = ['onConfigRename', 20];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Config/ConfigImportValidateEventSubscriberBase.php b/core/lib/Drupal/Core/Config/ConfigImportValidateEventSubscriberBase.php
index 4f172a365508c211e4f6dfddac6e198242b3a034..ca4964552d28cfd490c94baa8fe5b442886b087f 100644
--- a/core/lib/Drupal/Core/Config/ConfigImportValidateEventSubscriberBase.php
+++ b/core/lib/Drupal/Core/Config/ConfigImportValidateEventSubscriberBase.php
@@ -23,7 +23,7 @@ abstract public function onConfigImporterValidate(ConfigImporterEvent $event);
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::IMPORT_VALIDATE][] = array('onConfigImporterValidate', 20);
+    $events[ConfigEvents::IMPORT_VALIDATE][] = ['onConfigImporterValidate', 20];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Config/ConfigImporter.php b/core/lib/Drupal/Core/Config/ConfigImporter.php
index 25071b006faa957e0ef7299d41121dc7a31b9eef..7d48a4af3bebb3716193833cce494ecb0923db0e 100644
--- a/core/lib/Drupal/Core/Config/ConfigImporter.php
+++ b/core/lib/Drupal/Core/Config/ConfigImporter.php
@@ -135,7 +135,7 @@ class ConfigImporter {
    *
    * @var array
    */
-  protected $errors = array();
+  protected $errors = [];
 
   /**
    * The total number of extensions to process.
@@ -253,16 +253,16 @@ public function reset() {
    *   An empty list of extensions to process.
    */
   protected function getEmptyExtensionsProcessedList() {
-    return array(
-      'module' => array(
-        'install' => array(),
-        'uninstall' => array(),
-      ),
-      'theme' => array(
-        'install' => array(),
-        'uninstall' => array(),
-      ),
-    );
+    return [
+      'module' => [
+        'install' => [],
+        'uninstall' => [],
+      ],
+      'theme' => [
+        'install' => [],
+        'uninstall' => [],
+      ],
+    ];
   }
 
   /**
@@ -273,7 +273,7 @@ protected function getEmptyExtensionsProcessedList() {
    */
   public function hasUnprocessedConfigurationChanges() {
     foreach ($this->storageComparer->getAllCollectionNames() as $collection) {
-      foreach (array('delete', 'create', 'rename', 'update') as $op) {
+      foreach (['delete', 'create', 'rename', 'update'] as $op) {
         if (count($this->getUnprocessedConfiguration($op, $collection))) {
           return TRUE;
         }
@@ -440,10 +440,10 @@ public function getExtensionChangelist($type, $op = NULL) {
    */
   protected function getUnprocessedExtensions($type) {
     $changelist = $this->getExtensionChangelist($type);
-    return array(
+    return [
       'install' => array_diff($changelist['install'], $this->processedExtensions[$type]['install']),
       'uninstall' => array_diff($changelist['uninstall'], $this->processedExtensions[$type]['uninstall']),
-    );
+    ];
   }
 
   /**
@@ -459,7 +459,7 @@ public function import() {
       $sync_steps = $this->initialize();
 
       foreach ($sync_steps as $step) {
-        $context = array();
+        $context = [];
         do {
           $this->doSyncStep($step, $context);
         } while ($context['finished'] < 1);
@@ -489,7 +489,7 @@ public function doSyncStep($sync_step, &$context) {
     }
     elseif (is_callable($sync_step)) {
       \Drupal::service('config.installer')->setSyncing(TRUE);
-      call_user_func_array($sync_step, array(&$context, $this));
+      call_user_func_array($sync_step, [&$context, $this]);
     }
     else {
       throw new \InvalidArgumentException('Invalid configuration synchronization step');
@@ -517,13 +517,13 @@ public function initialize() {
       throw new ConfigImporterException(sprintf('%s is already importing', static::LOCK_NAME));
     }
 
-    $sync_steps = array();
+    $sync_steps = [];
     $modules = $this->getUnprocessedExtensions('module');
-    foreach (array('install', 'uninstall') as $op) {
+    foreach (['install', 'uninstall'] as $op) {
       $this->totalExtensionsToProcess += count($modules[$op]);
     }
     $themes = $this->getUnprocessedExtensions('theme');
-    foreach (array('install', 'uninstall') as $op) {
+    foreach (['install', 'uninstall'] as $op) {
       $this->totalExtensionsToProcess += count($themes[$op]);
     }
 
@@ -549,7 +549,7 @@ protected function processExtensions(&$context) {
     $operation = $this->getNextExtensionOperation();
     if (!empty($operation)) {
       $this->processExtension($operation['type'], $operation['op'], $operation['name']);
-      $context['message'] = t('Synchronizing extensions: @op @name.', array('@op' => $operation['op'], '@name' => $operation['name']));
+      $context['message'] = t('Synchronizing extensions: @op @name.', ['@op' => $operation['op'], '@name' => $operation['name']]);
       $processed_count = count($this->processedExtensions['module']['install']) + count($this->processedExtensions['module']['uninstall']);
       $processed_count += count($this->processedExtensions['theme']['uninstall']) + count($this->processedExtensions['theme']['install']);
       $context['finished'] = $processed_count / $this->totalExtensionsToProcess;
@@ -573,7 +573,7 @@ protected function processConfigurations(&$context) {
     if ($this->totalConfigurationToProcess == 0) {
       $this->storageComparer->reset();
       foreach ($this->storageComparer->getAllCollectionNames() as $collection) {
-        foreach (array('delete', 'create', 'rename', 'update') as $op) {
+        foreach (['delete', 'create', 'rename', 'update'] as $op) {
           $this->totalConfigurationToProcess += count($this->getUnprocessedConfiguration($op, $collection));
         }
       }
@@ -584,14 +584,14 @@ protected function processConfigurations(&$context) {
         $this->processConfiguration($operation['collection'], $operation['op'], $operation['name']);
       }
       if ($operation['collection'] == StorageInterface::DEFAULT_COLLECTION) {
-        $context['message'] = $this->t('Synchronizing configuration: @op @name.', array('@op' => $operation['op'], '@name' => $operation['name']));
+        $context['message'] = $this->t('Synchronizing configuration: @op @name.', ['@op' => $operation['op'], '@name' => $operation['name']]);
       }
       else {
-        $context['message'] = $this->t('Synchronizing configuration: @op @name in @collection.', array('@op' => $operation['op'], '@name' => $operation['name'], '@collection' => $operation['collection']));
+        $context['message'] = $this->t('Synchronizing configuration: @op @name in @collection.', ['@op' => $operation['op'], '@name' => $operation['name'], '@collection' => $operation['collection']]);
       }
       $processed_count = 0;
       foreach ($this->storageComparer->getAllCollectionNames() as $collection) {
-        foreach (array('delete', 'create', 'rename', 'update') as $op) {
+        foreach (['delete', 'create', 'rename', 'update'] as $op) {
           $processed_count += count($this->processedConfiguration[$collection][$op]);
         }
       }
@@ -657,15 +657,15 @@ protected function finish(&$context) {
    *   on. If there is nothing left to do returns FALSE;
    */
   protected function getNextExtensionOperation() {
-    foreach (array('module', 'theme') as $type) {
-      foreach (array('install', 'uninstall') as $op) {
+    foreach (['module', 'theme'] as $type) {
+      foreach (['install', 'uninstall'] as $op) {
         $unprocessed = $this->getUnprocessedExtensions($type);
         if (!empty($unprocessed[$op])) {
-          return array(
+          return [
             'op' => $op,
             'type' => $type,
             'name' => array_shift($unprocessed[$op]),
-          );
+          ];
         }
       }
     }
@@ -683,14 +683,14 @@ protected function getNextConfigurationOperation() {
     // The order configuration operations is processed is important. Deletes
     // have to come first so that recreates can work.
     foreach ($this->storageComparer->getAllCollectionNames() as $collection) {
-      foreach (array('delete', 'create', 'rename', 'update') as $op) {
+      foreach (['delete', 'create', 'rename', 'update'] as $op) {
         $config_names = $this->getUnprocessedConfiguration($op, $collection);
         if (!empty($config_names)) {
-          return array(
+          return [
             'op' => $op,
             'name' => array_shift($config_names),
             'collection' => $collection,
-          );
+          ];
         }
       }
     }
@@ -716,11 +716,11 @@ public function validate() {
         $old_entity_type_id = $this->configManager->getEntityTypeIdByName($names['old_name']);
         $new_entity_type_id = $this->configManager->getEntityTypeIdByName($names['new_name']);
         if ($old_entity_type_id != $new_entity_type_id) {
-          $this->logError($this->t('Entity type mismatch on rename. @old_type not equal to @new_type for existing configuration @old_name and staged configuration @new_name.', array('@old_type' => $old_entity_type_id, '@new_type' => $new_entity_type_id, '@old_name' => $names['old_name'], '@new_name' => $names['new_name'])));
+          $this->logError($this->t('Entity type mismatch on rename. @old_type not equal to @new_type for existing configuration @old_name and staged configuration @new_name.', ['@old_type' => $old_entity_type_id, '@new_type' => $new_entity_type_id, '@old_name' => $names['old_name'], '@new_name' => $names['new_name']]));
         }
         // Has to be a configuration entity.
         if (!$old_entity_type_id) {
-          $this->logError($this->t('Rename operation for simple configuration. Existing configuration @old_name and staged configuration @new_name.', array('@old_name' => $names['old_name'], '@new_name' => $names['new_name'])));
+          $this->logError($this->t('Rename operation for simple configuration. Existing configuration @old_name and staged configuration @new_name.', ['@old_name' => $names['old_name'], '@new_name' => $names['new_name']]));
         }
       }
       $this->eventDispatcher->dispatch(ConfigEvents::IMPORT_VALIDATE, new ConfigImporterEvent($this));
@@ -760,7 +760,7 @@ protected function processConfiguration($collection, $op, $name) {
       }
     }
     catch (\Exception $e) {
-      $this->logError($this->t('Unexpected error during import with operation @op for @name: @message', array('@op' => $op, '@name' => $name, '@message' => $e->getMessage())));
+      $this->logError($this->t('Unexpected error during import with operation @op for @name: @message', ['@op' => $op, '@name' => $name, '@message' => $e->getMessage()]));
       // Error for that operation was logged, mark it as processed so that
       // the import can continue.
       $this->setProcessedConfiguration($collection, $op, $name);
@@ -783,7 +783,7 @@ protected function processExtension($type, $op, $name) {
     \Drupal::service('config.installer')
       ->setSourceStorage($this->storageComparer->getSourceStorage());
     if ($type == 'module') {
-      $this->moduleInstaller->$op(array($name), FALSE);
+      $this->moduleInstaller->$op([$name], FALSE);
       // Installing a module can cause a kernel boot therefore reinject all the
       // services.
       $this->reInjectMe();
@@ -803,7 +803,7 @@ protected function processExtension($type, $op, $name) {
         $this->configManager->getConfigFactory()->reset('system.theme');
         $this->processedSystemTheme = TRUE;
       }
-      $this->themeHandler->$op(array($name));
+      $this->themeHandler->$op([$name]);
     }
 
     $this->setProcessedExtension($type, $op, $name);
@@ -863,11 +863,11 @@ protected function checkOp($collection, $op, $name) {
             $entity_type = $this->configManager->getEntityManager()->getDefinition($entity_type_id);
             $entity = $entity_storage->load($entity_storage->getIDFromConfigName($name, $entity_type->getConfigPrefix()));
             $entity->delete();
-            $this->logError($this->t('Deleted and replaced configuration entity "@name"', array('@name' => $name)));
+            $this->logError($this->t('Deleted and replaced configuration entity "@name"', ['@name' => $name]));
           }
           else {
             $this->storageComparer->getTargetStorage($collection)->delete($name);
-            $this->logError($this->t('Deleted and replaced configuration "@name"', array('@name' => $name)));
+            $this->logError($this->t('Deleted and replaced configuration "@name"', ['@name' => $name]));
           }
           return TRUE;
         }
@@ -875,7 +875,7 @@ protected function checkOp($collection, $op, $name) {
 
       case 'update':
         if (!$target_exists) {
-          $this->logError($this->t('Update target "@name" is missing.', array('@name' => $name)));
+          $this->logError($this->t('Update target "@name" is missing.', ['@name' => $name]));
           // Mark as processed so that the synchronization continues. Once the
           // the current synchronization is complete it will show up as a
           // create.
@@ -912,7 +912,7 @@ protected function importConfig($collection, $op, $name) {
     }
     else {
       $data = $this->storageComparer->getSourceStorage($collection)->read($name);
-      $config->setData($data ? $data : array());
+      $config->setData($data ? $data : []);
       $config->save();
     }
     $this->setProcessedConfiguration($collection, $op, $name);
@@ -1037,7 +1037,7 @@ public function alreadyImporting() {
    * keep the services used by the importer in sync.
    */
   protected function reInjectMe() {
-    $this->_serviceIds = array();
+    $this->_serviceIds = [];
     $vars = get_object_vars($this);
     foreach ($vars as $key => $value) {
       if (is_object($value) && isset($value->_serviceId)) {
diff --git a/core/lib/Drupal/Core/Config/ConfigInstaller.php b/core/lib/Drupal/Core/Config/ConfigInstaller.php
index 7b938fa8f0a90638ac60f8412553e2face9fcca0..c632aa8bbb95b638cdebc9e3bc2f966a4cc0ed67 100644
--- a/core/lib/Drupal/Core/Config/ConfigInstaller.php
+++ b/core/lib/Drupal/Core/Config/ConfigInstaller.php
@@ -425,7 +425,7 @@ public function isSyncing() {
    *   collection.
    */
   protected function findPreExistingConfiguration(StorageInterface $storage) {
-    $existing_configuration = array();
+    $existing_configuration = [];
     // Gather information about all the supported collections.
     $collection_info = $this->configManager->getConfigCollectionInfo();
 
diff --git a/core/lib/Drupal/Core/Config/ConfigManager.php b/core/lib/Drupal/Core/Config/ConfigManager.php
index b5b1c905e1d4a7f58341cbfcad4f3e421da874ba..65da2e9136d96908725cf880bd9d65975f8dc0c3 100644
--- a/core/lib/Drupal/Core/Config/ConfigManager.php
+++ b/core/lib/Drupal/Core/Config/ConfigManager.php
@@ -148,17 +148,17 @@ public function diff(StorageInterface $source_storage, StorageInterface $target_
     $target_data = explode("\n", Yaml::encode($target_storage->read($target_name)));
 
     // Check for new or removed files.
-    if ($source_data === array('false')) {
+    if ($source_data === ['false']) {
       // Added file.
       // Cast the result of t() to a string, as the diff engine doesn't know
       // about objects.
-      $source_data = array((string) $this->t('File added'));
+      $source_data = [(string) $this->t('File added')];
     }
-    if ($target_data === array('false')) {
+    if ($target_data === ['false']) {
       // Deleted file.
       // Cast the result of t() to a string, as the diff engine doesn't know
       // about objects.
-      $target_data = array((string) $this->t('File removed'));
+      $target_data = [(string) $this->t('File removed')];
     }
 
     return new Diff($source_data, $target_data);
@@ -251,7 +251,7 @@ public function findConfigEntityDependents($type, array $names, ConfigDependency
     if (!$dependency_manager) {
       $dependency_manager = $this->getConfigDependencyManager();
     }
-    $dependencies = array();
+    $dependencies = [];
     foreach ($names as $name) {
       $dependencies = array_merge($dependencies, $dependency_manager->getDependentEntities($type, $name));
     }
@@ -263,7 +263,7 @@ public function findConfigEntityDependents($type, array $names, ConfigDependency
    */
   public function findConfigEntityDependentsAsEntities($type, array $names, ConfigDependencyManager $dependency_manager = NULL) {
     $dependencies = $this->findConfigEntityDependents($type, $names, $dependency_manager);
-    $entities = array();
+    $entities = [];
     $definitions = $this->entityManager->getDefinitions();
     foreach ($dependencies as $config_name => $dependency) {
       // Group by entity type to efficient load entities using
@@ -278,7 +278,7 @@ public function findConfigEntityDependentsAsEntities($type, array $names, Config
         $entities[$entity_type_id][] = $id;
       }
     }
-    $entities_to_return = array();
+    $entities_to_return = [];
     foreach ($entities as $entity_type_id => $entities_to_load) {
       $storage = $this->entityManager->getStorage($entity_type_id);
       // Remove the keys since there are potential ID clashes from different
@@ -411,12 +411,12 @@ protected function callOnDependencyRemoval(ConfigEntityInterface $entity, array
       return FALSE;
     }
 
-    $affected_dependencies = array(
-      'config' => array(),
-      'content' => array(),
-      'module' => array(),
-      'theme' => array(),
-    );
+    $affected_dependencies = [
+      'config' => [],
+      'content' => [],
+      'module' => [],
+      'theme' => [],
+    ];
 
     // Work out if any of the entity's dependencies are going to be affected.
     if (isset($entity_dependencies[$type])) {
@@ -465,8 +465,8 @@ protected function callOnDependencyRemoval(ConfigEntityInterface $entity, array
    * {@inheritdoc}
    */
   public function findMissingContentDependencies() {
-    $content_dependencies = array();
-    $missing_dependencies = array();
+    $content_dependencies = [];
+    $missing_dependencies = [];
     foreach ($this->activeStorage->readMultiple($this->activeStorage->listAll()) as $config_data) {
       if (isset($config_data['dependencies']['content'])) {
         $content_dependencies = array_merge($content_dependencies, $config_data['dependencies']['content']);
@@ -479,11 +479,11 @@ public function findMissingContentDependencies() {
       // Format of the dependency is entity_type:bundle:uuid.
       list($entity_type, $bundle, $uuid) = explode(':', $content_dependency, 3);
       if (!$this->entityManager->loadEntityByUuid($entity_type, $uuid)) {
-        $missing_dependencies[$uuid] = array(
+        $missing_dependencies[$uuid] = [
           'entity_type' => $entity_type,
           'bundle' => $bundle,
           'uuid' => $uuid,
-        );
+        ];
       }
     }
     return $missing_dependencies;
diff --git a/core/lib/Drupal/Core/Config/ConfigModuleOverridesEvent.php b/core/lib/Drupal/Core/Config/ConfigModuleOverridesEvent.php
index f6a6261bcd80b9c22f97c35163a91c34ccb84c85..c4b4230df83b5f4474821bce537058bb855961a4 100644
--- a/core/lib/Drupal/Core/Config/ConfigModuleOverridesEvent.php
+++ b/core/lib/Drupal/Core/Config/ConfigModuleOverridesEvent.php
@@ -43,7 +43,7 @@ class ConfigModuleOverridesEvent extends Event {
   public function __construct(array $names, LanguageInterface $language = NULL) {
     $this->names = $names;
     $this->language = $language;
-    $this->overrides = array();
+    $this->overrides = [];
   }
 
   /**
@@ -91,7 +91,7 @@ public function setOverride($name, array $values) {
       if (isset($this->overrides[$name])) {
         // Existing overrides take precedence since these will have been added
         // by events with a higher priority.
-        $this->overrides[$name] = NestedArray::mergeDeepArray(array($values, $this->overrides[$name]), TRUE);
+        $this->overrides[$name] = NestedArray::mergeDeepArray([$values, $this->overrides[$name]], TRUE);
       }
       else {
         $this->overrides[$name] = $values;
diff --git a/core/lib/Drupal/Core/Config/DatabaseStorage.php b/core/lib/Drupal/Core/Config/DatabaseStorage.php
index 4e0c1844b8838f29b93475eef1be8ab2519a74e9..1368dfff5d030001a8460cf02d260c6b172274fe 100644
--- a/core/lib/Drupal/Core/Config/DatabaseStorage.php
+++ b/core/lib/Drupal/Core/Config/DatabaseStorage.php
@@ -32,7 +32,7 @@ class DatabaseStorage implements StorageInterface {
    *
    * @var array
    */
-  protected $options = array();
+  protected $options = [];
 
   /**
    * The storage collection.
@@ -54,7 +54,7 @@ class DatabaseStorage implements StorageInterface {
    *   (optional) The collection to store configuration in. Defaults to the
    *   default collection.
    */
-  public function __construct(Connection $connection, $table, array $options = array(), $collection = StorageInterface::DEFAULT_COLLECTION) {
+  public function __construct(Connection $connection, $table, array $options = [], $collection = StorageInterface::DEFAULT_COLLECTION) {
     $this->connection = $connection;
     $this->table = $table;
     $this->options = $options;
@@ -66,10 +66,10 @@ public function __construct(Connection $connection, $table, array $options = arr
    */
   public function exists($name) {
     try {
-      return (bool) $this->connection->queryRange('SELECT 1 FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name = :name', 0, 1, array(
+      return (bool) $this->connection->queryRange('SELECT 1 FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name = :name', 0, 1, [
         ':collection' => $this->collection,
         ':name' => $name,
-      ), $this->options)->fetchField();
+      ], $this->options)->fetchField();
     }
     catch (\Exception $e) {
       // If we attempt a read without actually having the database or the table
@@ -84,7 +84,7 @@ public function exists($name) {
   public function read($name) {
     $data = FALSE;
     try {
-      $raw = $this->connection->query('SELECT data FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name = :name', array(':collection' => $this->collection, ':name' => $name), $this->options)->fetchField();
+      $raw = $this->connection->query('SELECT data FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name = :name', [':collection' => $this->collection, ':name' => $name], $this->options)->fetchField();
       if ($raw !== FALSE) {
         $data = $this->decode($raw);
       }
@@ -100,9 +100,9 @@ public function read($name) {
    * {@inheritdoc}
    */
   public function readMultiple(array $names) {
-    $list = array();
+    $list = [];
     try {
-      $list = $this->connection->query('SELECT name, data FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name IN ( :names[] )', array(':collection' => $this->collection, ':names[]' => $names), $this->options)->fetchAllKeyed();
+      $list = $this->connection->query('SELECT name, data FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name IN ( :names[] )', [':collection' => $this->collection, ':names[]' => $names], $this->options)->fetchAllKeyed();
       foreach ($list as &$data) {
         $data = $this->decode($data);
       }
@@ -143,10 +143,10 @@ public function write($name, array $data) {
    * @return bool
    */
   protected function doWrite($name, $data) {
-    $options = array('return' => Database::RETURN_AFFECTED) + $this->options;
+    $options = ['return' => Database::RETURN_AFFECTED] + $this->options;
     return (bool) $this->connection->merge($this->table, $options)
-      ->keys(array('collection', 'name'), array($this->collection, $name))
-      ->fields(array('data' => $data))
+      ->keys(['collection', 'name'], [$this->collection, $name])
+      ->fields(['data' => $data])
       ->execute();
   }
 
@@ -182,32 +182,32 @@ protected function ensureTableExists()  {
    * Defines the schema for the configuration table.
    */
   protected static function schemaDefinition() {
-    $schema = array(
+    $schema = [
       'description' => 'The base table for configuration data.',
-      'fields' => array(
-        'collection' => array(
+      'fields' => [
+        'collection' => [
           'description' => 'Primary Key: Config object collection.',
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'name' => array(
+        ],
+        'name' => [
           'description' => 'Primary Key: Config object name.',
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'data' => array(
+        ],
+        'data' => [
           'description' => 'A serialized configuration object data.',
           'type' => 'blob',
           'not null' => FALSE,
           'size' => 'big',
-        ),
-      ),
-      'primary key' => array('collection', 'name'),
-    );
+        ],
+      ],
+      'primary key' => ['collection', 'name'],
+    ];
     return $schema;
   }
 
@@ -219,7 +219,7 @@ protected static function schemaDefinition() {
    * @todo Ignore replica targets for data manipulation operations.
    */
   public function delete($name) {
-    $options = array('return' => Database::RETURN_AFFECTED) + $this->options;
+    $options = ['return' => Database::RETURN_AFFECTED] + $this->options;
     return (bool) $this->connection->delete($this->table, $options)
       ->condition('collection', $this->collection)
       ->condition('name', $name)
@@ -233,9 +233,9 @@ public function delete($name) {
    * @throws PDOException
    */
   public function rename($name, $new_name) {
-    $options = array('return' => Database::RETURN_AFFECTED) + $this->options;
+    $options = ['return' => Database::RETURN_AFFECTED] + $this->options;
     return (bool) $this->connection->update($this->table, $options)
-      ->fields(array('name' => $new_name))
+      ->fields(['name' => $new_name])
       ->condition('name', $name)
       ->condition('collection', $this->collection)
       ->execute();
@@ -266,14 +266,14 @@ public function decode($raw) {
   public function listAll($prefix = '') {
     try {
       $query = $this->connection->select($this->table);
-      $query->fields($this->table, array('name'));
+      $query->fields($this->table, ['name']);
       $query->condition('collection', $this->collection, '=');
       $query->condition('name', $prefix . '%', 'LIKE');
       $query->orderBy('collection')->orderBy('name');
       return $query->execute()->fetchCol();
     }
     catch (\Exception $e) {
-      return array();
+      return [];
     }
   }
 
@@ -282,7 +282,7 @@ public function listAll($prefix = '') {
    */
   public function deleteAll($prefix = '') {
     try {
-      $options = array('return' => Database::RETURN_AFFECTED) + $this->options;
+      $options = ['return' => Database::RETURN_AFFECTED] + $this->options;
       return (bool) $this->connection->delete($this->table, $options)
         ->condition('name', $prefix . '%', 'LIKE')
         ->condition('collection', $this->collection)
@@ -317,12 +317,12 @@ public function getCollectionName() {
    */
   public function getAllCollectionNames() {
     try {
-      return $this->connection->query('SELECT DISTINCT collection FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection <> :collection ORDER by collection', array(
-        ':collection' => StorageInterface::DEFAULT_COLLECTION)
+      return $this->connection->query('SELECT DISTINCT collection FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection <> :collection ORDER by collection', [
+        ':collection' => StorageInterface::DEFAULT_COLLECTION]
       )->fetchCol();
     }
     catch (\Exception $e) {
-      return array();
+      return [];
     }
   }
 
diff --git a/core/lib/Drupal/Core/Config/Development/ConfigSchemaChecker.php b/core/lib/Drupal/Core/Config/Development/ConfigSchemaChecker.php
index e639966c2dae9e2c59b1bd037e5016c085b9502d..ba69001f4d7e2ab9c5f68eb72a8e70585f3b72e6 100644
--- a/core/lib/Drupal/Core/Config/Development/ConfigSchemaChecker.php
+++ b/core/lib/Drupal/Core/Config/Development/ConfigSchemaChecker.php
@@ -38,14 +38,14 @@ class ConfigSchemaChecker implements EventSubscriberInterface {
    *
    * @var array
    */
-  protected $checked = array();
+  protected $checked = [];
 
   /**
    * An array of config object names that are excluded from schema checking.
    *
    * @var string[]
    */
-  protected $exclude = array();
+  protected $exclude = [];
 
   /**
    * Constructs the ConfigSchemaChecker object.
@@ -55,7 +55,7 @@ class ConfigSchemaChecker implements EventSubscriberInterface {
    * @param string[] $exclude
    *   An array of config object names that are excluded from schema checking.
    */
-  public function __construct(TypedConfigManagerInterface $typed_manager, array $exclude = array()) {
+  public function __construct(TypedConfigManagerInterface $typed_manager, array $exclude = []) {
     $this->typedManager = $typed_manager;
     $this->exclude = $exclude;
   }
@@ -90,7 +90,7 @@ public function onConfigSave(ConfigCrudEvent $event) {
       elseif (is_array($errors)) {
         $text_errors = [];
         foreach ($errors as $key => $error) {
-          $text_errors[] = SafeMarkup::format('@key @error', array('@key' => $key, '@error' => $error));
+          $text_errors[] = SafeMarkup::format('@key @error', ['@key' => $key, '@error' => $error]);
         }
         throw new SchemaIncompleteException("Schema errors for $name with the following errors: " . implode(', ', $text_errors));
       }
@@ -101,7 +101,7 @@ public function onConfigSave(ConfigCrudEvent $event) {
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    $events[ConfigEvents::SAVE][] = array('onConfigSave', 255);
+    $events[ConfigEvents::SAVE][] = ['onConfigSave', 255];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigDependencyDeleteFormTrait.php b/core/lib/Drupal/Core/Config/Entity/ConfigDependencyDeleteFormTrait.php
index 44c02e3f8e92ea18c3bac6b266498d37cb1a81b1..2ec87ddfacf36bef72a43eb790e5728539ec39fe 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigDependencyDeleteFormTrait.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigDependencyDeleteFormTrait.php
@@ -17,7 +17,7 @@ trait ConfigDependencyDeleteFormTrait {
    *
    * Provided by \Drupal\Core\StringTranslation\StringTranslationTrait.
    */
-  abstract protected function t($string, array $args = array(), array $options = array());
+  abstract protected function t($string, array $args = [], array $options = []);
 
   /**
    * Adds form elements to list affected configuration entities.
@@ -41,15 +41,15 @@ abstract protected function t($string, array $args = array(), array $options = a
   protected function addDependencyListsToForm(array &$form, $type, array $names, ConfigManagerInterface $config_manager, EntityManagerInterface $entity_manager) {
     // Get the dependent entities.
     $dependent_entities = $config_manager->getConfigEntitiesToChangeOnDependencyRemoval($type, $names);
-    $entity_types = array();
+    $entity_types = [];
 
-    $form['entity_updates'] = array(
+    $form['entity_updates'] = [
       '#type' => 'details',
       '#title' => $this->t('Configuration updates'),
       '#description' => $this->t('The listed configuration will be updated.'),
       '#open' => TRUE,
       '#access' => FALSE,
-    );
+    ];
 
     foreach ($dependent_entities['update'] as $entity) {
       /** @var \Drupal\Core\Config\Entity\ConfigEntityInterface  $entity */
@@ -59,11 +59,11 @@ protected function addDependencyListsToForm(array &$form, $type, array $names, C
         // Store the ID and label to sort the entity types and entities later.
         $label = $entity_type->getLabel();
         $entity_types[$entity_type_id] = $label;
-        $form['entity_updates'][$entity_type_id] = array(
+        $form['entity_updates'][$entity_type_id] = [
           '#theme' => 'item_list',
           '#title' => $label,
-          '#items' => array(),
-        );
+          '#items' => [],
+        ];
       }
       $form['entity_updates'][$entity_type_id]['#items'][$entity->id()] = $entity->label() ?: $entity->id();
     }
@@ -81,13 +81,13 @@ protected function addDependencyListsToForm(array &$form, $type, array $names, C
       }
     }
 
-    $form['entity_deletes'] = array(
+    $form['entity_deletes'] = [
       '#type' => 'details',
       '#title' => $this->t('Configuration deletions'),
       '#description' => $this->t('The listed configuration will be deleted.'),
       '#open' => TRUE,
       '#access' => FALSE,
-    );
+    ];
 
     foreach ($dependent_entities['delete'] as $entity) {
       $entity_type_id = $entity->getEntityTypeId();
@@ -96,11 +96,11 @@ protected function addDependencyListsToForm(array &$form, $type, array $names, C
         // Store the ID and label to sort the entity types and entities later.
         $label = $entity_type->getLabel();
         $entity_types[$entity_type_id] = $label;
-        $form['entity_deletes'][$entity_type_id] = array(
+        $form['entity_deletes'][$entity_type_id] = [
           '#theme' => 'item_list',
           '#title' => $label,
-          '#items' => array(),
-        );
+          '#items' => [],
+        ];
       }
       $form['entity_deletes'][$entity_type_id]['#items'][$entity->id()] = $entity->label() ?: $entity->id();
     }
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigDependencyManager.php b/core/lib/Drupal/Core/Config/Entity/ConfigDependencyManager.php
index 0dc1971383b6df929ce7ab586ec76debc944e520..237929d42bd0fe77a1e808cb67202e23f40bcd45 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigDependencyManager.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigDependencyManager.php
@@ -126,7 +126,7 @@ class ConfigDependencyManager {
    *
    * @var \Drupal\Core\Config\Entity\ConfigEntityDependency[]
    */
-  protected $data = array();
+  protected $data = [];
 
   /**
    * The directed acyclic graph.
@@ -150,9 +150,9 @@ class ConfigDependencyManager {
    *   An array of config entity dependency objects that are dependent.
    */
   public function getDependentEntities($type, $name) {
-    $dependent_entities = array();
+    $dependent_entities = [];
 
-    $entities_to_check = array();
+    $entities_to_check = [];
     if ($type == 'config') {
       $entities_to_check[] = $name;
     }
@@ -281,7 +281,7 @@ public static function sortGraph(array $a, array $b) {
    *   supplied entities to check.
    */
   protected function createGraphConfigEntityDependencies($entities_to_check) {
-    $dependent_entities = array();
+    $dependent_entities = [];
     $graph = $this->getGraph();
 
     foreach ($entities_to_check as $entity) {
@@ -304,7 +304,7 @@ protected function createGraphConfigEntityDependencies($entities_to_check) {
    */
   protected function getGraph() {
     if (!isset($this->graph)) {
-      $graph = array();
+      $graph = [];
       foreach ($this->data as $entity) {
         $graph_key = $entity->getConfigDependencyName();
         if (!isset($graph[$graph_key])) {
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
index 08e7e19170ae97378e7a30875d535fd631a7adb4..90bb702379994de8f414ff4378dbc594c3619bbe 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
@@ -86,7 +86,7 @@ abstract class ConfigEntityBase extends Entity implements ConfigEntityInterface
    *
    * @var array
    */
-  protected $third_party_settings = array();
+  protected $third_party_settings = [];
 
   /**
    * Information maintained by Drupal core about configuration.
@@ -263,7 +263,7 @@ public static function sort(ConfigEntityInterface $a, ConfigEntityInterface $b)
    * {@inheritdoc}
    */
   public function toArray() {
-    $properties = array();
+    $properties = [];
     /** @var \Drupal\Core\Config\Entity\ConfigEntityTypeInterface $entity_type */
     $entity_type = $this->getEntityType();
 
@@ -411,7 +411,7 @@ public function urlInfo($rel = 'edit-form', array $options = []) {
   /**
    * {@inheritdoc}
    */
-  public function url($rel = 'edit-form', $options = array()) {
+  public function url($rel = 'edit-form', $options = []) {
     // Do not remove this override: the default value of $rel is different.
     return parent::url($rel, $options);
   }
@@ -551,7 +551,7 @@ public function getThirdPartySetting($module, $key, $default = NULL) {
    * {@inheritdoc}
    */
   public function getThirdPartySettings($module) {
-    return isset($this->third_party_settings[$module]) ? $this->third_party_settings[$module] : array();
+    return isset($this->third_party_settings[$module]) ? $this->third_party_settings[$module] : [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBundleBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBundleBase.php
index dc17e054607b2a4fc0c1a7180cd0a151da5304ab..59128d86c771a8ff98491d1c15fc626fb96469bf 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBundleBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBundleBase.php
@@ -109,7 +109,7 @@ protected function loadDisplays($entity_type_id) {
       $storage = $this->entityManager()->getStorage($entity_type_id);
       return $storage->loadMultiple($ids);
     }
-    return array();
+    return [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityDependency.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityDependency.php
index 1b9a80edd71839e726207b428f0e1f74fb8a973b..d92b55b6ebe7aa9442e9eb15b052e0f90d3f2d7f 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityDependency.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityDependency.php
@@ -57,7 +57,7 @@ public function __construct($name, $values = []) {
    *   The list of dependencies of the supplied type.
    */
   public function getDependencies($type) {
-    $dependencies = array();
+    $dependencies = [];
     if (isset($this->dependencies[$type])) {
       $dependencies = $this->dependencies[$type];
     }
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityListBuilder.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityListBuilder.php
index acd9d030adf0499c4c81f937aa759c18963cef46..38b7fa87a15366c897f72582404c30aee037bedf 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityListBuilder.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityListBuilder.php
@@ -21,7 +21,7 @@ public function load() {
 
     // Sort the entities using the entity class's sort() method.
     // See \Drupal\Core\Config\Entity\ConfigEntityBase::sort().
-    uasort($entities, array($this->entityType->getClass(), 'sort'));
+    uasort($entities, [$this->entityType->getClass(), 'sort']);
     return $entities;
   }
 
@@ -34,18 +34,18 @@ public function getDefaultOperations(EntityInterface $entity) {
 
     if ($this->entityType->hasKey('status')) {
       if (!$entity->status() && $entity->hasLinkTemplate('enable')) {
-        $operations['enable'] = array(
+        $operations['enable'] = [
           'title' => t('Enable'),
           'weight' => -10,
           'url' => $entity->urlInfo('enable'),
-        );
+        ];
       }
       elseif ($entity->hasLinkTemplate('disable')) {
-        $operations['disable'] = array(
+        $operations['disable'] = [
           'title' => t('Disable'),
           'weight' => 40,
           'url' => $entity->urlInfo('disable'),
-        );
+        ];
       }
     }
 
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
index 3834dae082a4dd5a85ca4c52ed41188bbe2da534..11b66fc7a1939b23aa1ee7fb08ef5d2b47e2496f 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
@@ -84,7 +84,7 @@ class ConfigEntityStorage extends EntityStorageBase implements ConfigEntityStora
    * @var array
    * @see \Drupal\Core\Config\ConfigFactoryInterface::getCacheKeys().
    */
-  protected $entities = array();
+  protected $entities = [];
 
   /**
    * Determines if the underlying configuration is retrieved override free.
@@ -170,7 +170,7 @@ protected function doLoadMultiple(array $ids = NULL) {
       $names = $this->configFactory->listAll($prefix);
     }
     else {
-      $names = array();
+      $names = [];
       foreach ($ids as $id) {
         // Add the prefix to the ID to serve as the configuration object name.
         $names[] = $prefix . $id;
@@ -220,7 +220,7 @@ protected function doLoadMultiple(array $ids = NULL) {
    */
   protected function doCreate(array $values) {
     // Set default language to current language if not provided.
-    $values += array($this->langcodeKey => $this->languageManager->getCurrentLanguage()->getId());
+    $values += [$this->langcodeKey => $this->languageManager->getCurrentLanguage()->getId()];
     $entity = new $this->entityClass($values, $this->entityTypeId);
 
     return $entity;
@@ -282,7 +282,7 @@ protected function doSave($id, EntityInterface $entity) {
     // Update the entity with the values stored in configuration. It is possible
     // that configuration schema has casted some of the values.
     if (!$entity->hasTrustedData()) {
-      $data = $this->mapFromStorageRecords(array($config->get()));
+      $data = $this->mapFromStorageRecords([$config->get()]);
       $updated_entity = current($data);
 
       foreach (array_keys($config->get()) as $property) {
@@ -326,7 +326,7 @@ protected function has($id, EntityInterface $entity) {
    *   Array of entities from the entity cache.
    */
   protected function getFromStaticCache(array $ids) {
-    $entities = array();
+    $entities = [];
     // Load any available entities from the internal cache.
     if ($this->entityType->isStaticallyCacheable() && !empty($this->entities)) {
       $config_overrides_key = $this->overrideFree ? '' : implode(':', $this->configFactory->getCacheKeys());
@@ -366,9 +366,9 @@ protected function setStaticCache(array $entities) {
    */
   protected function invokeHook($hook, EntityInterface $entity) {
     // Invoke the hook.
-    $this->moduleHandler->invokeAll($this->entityTypeId . '_' . $hook, array($entity));
+    $this->moduleHandler->invokeAll($this->entityTypeId . '_' . $hook, [$entity]);
     // Invoke the respective entity-level hook.
-    $this->moduleHandler->invokeAll('entity_' . $hook, array($entity, $this->entityTypeId));
+    $this->moduleHandler->invokeAll('entity_' . $hook, [$entity, $this->entityTypeId]);
   }
 
   /**
@@ -449,7 +449,7 @@ protected function _doCreateFromStorageRecord(array $values, $is_syncing = FALSE
     if ($this->uuidKey && $this->uuidService && !isset($values[$this->uuidKey])) {
       $values[$this->uuidKey] = $this->uuidService->generate();
     }
-    $data = $this->mapFromStorageRecords(array($values));
+    $data = $this->mapFromStorageRecords([$values]);
     $entity = current($data);
     $entity->original = clone $entity;
     $entity->setSyncing($is_syncing);
@@ -469,7 +469,7 @@ protected function _doCreateFromStorageRecord(array $values, $is_syncing = FALSE
   public function updateFromStorageRecord(ConfigEntityInterface $entity, array $values) {
     $entity->original = clone $entity;
 
-    $data = $this->mapFromStorageRecords(array($values));
+    $data = $this->mapFromStorageRecords([$values]);
     $updated_entity = current($data);
 
     foreach (array_keys($values) as $property) {
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityType.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityType.php
index 1a364272395a4c7dedf5f0d307ad363d90e04d4c..11c9ff1bf093005fc75e20bb51d9fc1aef5a25fa 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityType.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityType.php
@@ -64,9 +64,9 @@ public function __construct($definition) {
     // Always add a default 'uuid' key.
     $this->entity_keys['uuid'] = 'uuid';
     $this->entity_keys['langcode'] = 'langcode';
-    $this->handlers += array(
+    $this->handlers += [
       'storage' => 'Drupal\Core\Config\Entity\ConfigEntityStorage',
-    );
+    ];
     $this->lookup_keys[] = 'uuid';
   }
 
diff --git a/core/lib/Drupal/Core/Config/Entity/DraggableListBuilder.php b/core/lib/Drupal/Core/Config/Entity/DraggableListBuilder.php
index 3aed1ece8dccdbec5490200a25c6adc30f1b2830..f6bf463b1631e1aa6287acf9087de3624c5e1cf4 100644
--- a/core/lib/Drupal/Core/Config/Entity/DraggableListBuilder.php
+++ b/core/lib/Drupal/Core/Config/Entity/DraggableListBuilder.php
@@ -25,7 +25,7 @@ abstract class DraggableListBuilder extends ConfigEntityListBuilder implements F
    *
    * @var \Drupal\Core\Entity\EntityInterface[]
    */
-  protected $entities = array();
+  protected $entities = [];
 
   /**
    * Name of the entity's weight field or FALSE if no field is provided.
@@ -62,7 +62,7 @@ public function __construct(EntityTypeInterface $entity_type, EntityStorageInter
    * {@inheritdoc}
    */
   public function buildHeader() {
-    $header = array();
+    $header = [];
     if (!empty($this->weightKey)) {
       $header['weight'] = t('Weight');
     }
@@ -73,19 +73,19 @@ public function buildHeader() {
    * {@inheritdoc}
    */
   public function buildRow(EntityInterface $entity) {
-    $row = array();
+    $row = [];
     if (!empty($this->weightKey)) {
       // Override default values to markup elements.
       $row['#attributes']['class'][] = 'draggable';
       $row['#weight'] = $entity->get($this->weightKey);
       // Add weight column.
-      $row['weight'] = array(
+      $row['weight'] = [
         '#type' => 'weight',
-        '#title' => t('Weight for @title', array('@title' => $entity->label())),
+        '#title' => t('Weight for @title', ['@title' => $entity->label()]),
         '#title_display' => 'invisible',
         '#default_value' => $entity->get($this->weightKey),
-        '#attributes' => array('class' => array('weight')),
-      );
+        '#attributes' => ['class' => ['weight']],
+      ];
     }
     return $row + parent::buildRow($entity);
   }
@@ -104,18 +104,18 @@ public function render() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form[$this->entitiesKey] = array(
+    $form[$this->entitiesKey] = [
       '#type' => 'table',
       '#header' => $this->buildHeader(),
-      '#empty' => t('There is no @label yet.', array('@label' => $this->entityType->getLabel())),
-      '#tabledrag' => array(
-        array(
+      '#empty' => t('There is no @label yet.', ['@label' => $this->entityType->getLabel()]),
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'weight',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     $this->entities = $this->load();
     $delta = 10;
@@ -129,7 +129,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     foreach ($this->entities as $entity) {
       $row = $this->buildRow($entity);
       if (isset($row['label'])) {
-        $row['label'] = array('#markup' => $row['label']);
+        $row['label'] = ['#markup' => $row['label']];
       }
       if (isset($row['weight'])) {
         $row['weight']['#delta'] = $delta;
@@ -138,11 +138,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => t('Save'),
       '#button_type' => 'primary',
-    );
+    ];
 
     return $form;
   }
diff --git a/core/lib/Drupal/Core/Config/Entity/Query/Condition.php b/core/lib/Drupal/Core/Config/Entity/Query/Condition.php
index c7e993db1f4079dd60a84427c6b3e30da57e7053..6764d01ea6eab259f60fadd0bbaf3d8c97a4e891 100644
--- a/core/lib/Drupal/Core/Config/Entity/Query/Condition.php
+++ b/core/lib/Drupal/Core/Config/Entity/Query/Condition.php
@@ -19,8 +19,8 @@ class Condition extends ConditionBase {
    */
   public function compile($configs) {
     $and = strtoupper($this->conjunction) == 'AND';
-    $single_conditions = array();
-    $condition_groups = array();
+    $single_conditions = [];
+    $condition_groups = [];
     foreach ($this->conditions as $condition) {
       if ($condition['field'] instanceof ConditionInterface) {
         $condition_groups[] = $condition;
@@ -41,7 +41,7 @@ public function compile($configs) {
         $single_conditions[] = $condition;
       }
     }
-    $return = array();
+    $return = [];
     if ($single_conditions) {
       foreach ($configs as $config_name => $config) {
         foreach ($single_conditions as $condition) {
@@ -110,7 +110,7 @@ public function notExists($field, $langcode = NULL) {
    * @return bool
    *   TRUE when the condition matched to the data else FALSE.
    */
-  protected function matchArray(array $condition, array $data, array $needs_matching, array $parents = array()) {
+  protected function matchArray(array $condition, array $data, array $needs_matching, array $parents = []) {
     $parent = array_shift($needs_matching);
     if ($parent === '*') {
       $candidates = array_keys($data);
@@ -120,7 +120,7 @@ protected function matchArray(array $condition, array $data, array $needs_matchi
       if (!isset($data[$parent])) {
         $data[$parent] = NULL;
       }
-      $candidates = array($parent);
+      $candidates = [$parent];
     }
     foreach ($candidates as $key) {
       if ($needs_matching) {
diff --git a/core/lib/Drupal/Core/Config/Entity/Query/Query.php b/core/lib/Drupal/Core/Config/Entity/Query/Query.php
index eee073f56cc8aed469011c7a0299904346ab14a1..e75b98a868d404421160523dd5b7e242b763ab21 100644
--- a/core/lib/Drupal/Core/Config/Entity/Query/Query.php
+++ b/core/lib/Drupal/Core/Config/Entity/Query/Query.php
@@ -141,7 +141,7 @@ protected function loadRecords() {
           elseif (in_array($condition['field'], $lookup_keys)) {
             // If we don't find anything then there are no matches. No point in
             // listing anything.
-            $names = array();
+            $names = [];
             $keys = (array) $condition['value'];
             $keys = array_map(function ($value) use ($condition) {
               return $condition['field'] . ':' . $value;
@@ -208,7 +208,7 @@ protected function loadRecords() {
     }
 
     // Load the corresponding records.
-    $records = array();
+    $records = [];
     foreach ($this->configFactory->loadMultiple($names) as $config) {
       $records[substr($config->getName(), $prefix_length)] = $config->get();
     }
diff --git a/core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php b/core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php
index 0327e902b385d07aa4b912ab309b88b2b912aeeb..ac12f56e743df9ed1a8f029b5b2d8bbe95e67970 100644
--- a/core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php
+++ b/core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php
@@ -163,7 +163,7 @@ protected function getKeys(Config $config, $key, $get_method, ConfigEntityTypeIn
 
     $values = (array) $this->getValues($config, $parts[0], $get_method, $parts);
 
-    $output = array();
+    $output = [];
     // Flatten the array to a single dimension and add the key to all the
     // values.
     array_walk_recursive($values, function ($current) use (&$output, $key) {
@@ -250,8 +250,8 @@ public function onConfigDelete(ConfigCrudEvent $event) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::SAVE][] = array('onConfigSave', 128);
-    $events[ConfigEvents::DELETE][] = array('onConfigDelete', 128);
+    $events[ConfigEvents::SAVE][] = ['onConfigSave', 128];
+    $events[ConfigEvents::DELETE][] = ['onConfigDelete', 128];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
index 16fecbc3966fc15880dda8480c28236b4eb38aba..9103ab8c07acd520358b6ac2a5043f830f755a89 100644
--- a/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
+++ b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
@@ -88,7 +88,7 @@ public function createCollection($collection) {
    */
   protected function getAllFolders() {
     if (!isset($this->folders)) {
-      $this->folders = array();
+      $this->folders = [];
       $this->folders += $this->getCoreNames();
 
       $extensions = $this->configStorage->read('core.extension');
@@ -107,7 +107,7 @@ protected function getAllFolders() {
           drupal_get_filename('profile', $this->installProfile, $profile_list[$this->installProfile]->getPathname());
         }
         $module_list_scan = $listing->scan('module');
-        $module_list = array();
+        $module_list = [];
         foreach (array_keys($modules) as $module) {
           if (isset($module_list_scan[$module])) {
             $module_list[$module] = $module_list_scan[$module];
@@ -134,7 +134,7 @@ protected function getAllFolders() {
             $profile_list = $listing->scan('profile');
           }
           if (isset($profile_list[$this->installProfile])) {
-            $profile_folders = $this->getComponentNames(array($profile_list[$this->installProfile]));
+            $profile_folders = $this->getComponentNames([$profile_list[$this->installProfile]]);
             $this->folders = $profile_folders + $this->folders;
           }
         }
diff --git a/core/lib/Drupal/Core/Config/FileStorage.php b/core/lib/Drupal/Core/Config/FileStorage.php
index 4904576e226680ba12cdf8c7c6175e8855247253..84d23d32745abe6d6d9b6b6ef088a77a33e1c8c4 100644
--- a/core/lib/Drupal/Core/Config/FileStorage.php
+++ b/core/lib/Drupal/Core/Config/FileStorage.php
@@ -125,7 +125,7 @@ public function read($name) {
    * {@inheritdoc}
    */
   public function readMultiple(array $names) {
-    $list = array();
+    $list = [];
     foreach ($names as $name) {
       if ($data = $this->read($name)) {
         $list[$name] = $data;
@@ -217,7 +217,7 @@ public function decode($raw) {
   public function listAll($prefix = '') {
     $dir = $this->getCollectionDirectory();
     if (!is_dir($dir)) {
-      return array();
+      return [];
     }
     $extension = '.' . static::getFileExtension();
 
@@ -227,7 +227,7 @@ public function listAll($prefix = '') {
     // @see https://github.com/mikey179/vfsStream/issues/2
     $files = scandir($dir);
 
-    $names = array();
+    $names = [];
     $pattern = '/^' . preg_quote($prefix, '/') . '.*' . preg_quote($extension, '/') . '$/';
     foreach ($files as $file) {
       if ($file[0] !== '.' && preg_match($pattern, $file)) {
@@ -311,7 +311,7 @@ public function getAllCollectionNames() {
    *   A list of collection names contained within the provided directory.
    */
   protected function getAllCollectionNamesHelper($directory) {
-    $collections = array();
+    $collections = [];
     $pattern = '/\.' . preg_quote($this->getFileExtension(), '/') . '$/';
     foreach (new \DirectoryIterator($directory) as $fileinfo) {
       if ($fileinfo->isDir() && !$fileinfo->isDot()) {
diff --git a/core/lib/Drupal/Core/Config/Importer/FinalMissingContentSubscriber.php b/core/lib/Drupal/Core/Config/Importer/FinalMissingContentSubscriber.php
index 9def6df921da857b5404994c20d41e8ad0ed9aa4..3dca3fbf00147482e9aca4090e25757bf5068028 100644
--- a/core/lib/Drupal/Core/Config/Importer/FinalMissingContentSubscriber.php
+++ b/core/lib/Drupal/Core/Config/Importer/FinalMissingContentSubscriber.php
@@ -33,7 +33,7 @@ public function onMissingContent(MissingContentEvent $event) {
   public static function getSubscribedEvents() {
     // This should always be the final event as it will mark all content
     // dependencies as resolved.
-    $events[ConfigEvents::IMPORT_MISSING_CONTENT][] = array('onMissingContent', -1024);
+    $events[ConfigEvents::IMPORT_MISSING_CONTENT][] = ['onMissingContent', -1024];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Config/InstallStorage.php b/core/lib/Drupal/Core/Config/InstallStorage.php
index bd9bf3055f82e11c449618e0cff5bc88cf2536fa..9fea3df47307389dcf4932455c79da6024ec2e28 100644
--- a/core/lib/Drupal/Core/Config/InstallStorage.php
+++ b/core/lib/Drupal/Core/Config/InstallStorage.php
@@ -131,7 +131,7 @@ public function listAll($prefix = '') {
       return $names;
     }
     else {
-      $return = array();
+      $return = [];
       foreach ($names as $index => $name) {
         if (strpos($name, $prefix) === 0 ) {
           $return[$index] = $names[$index];
@@ -149,7 +149,7 @@ public function listAll($prefix = '') {
    */
   protected function getAllFolders() {
     if (!isset($this->folders)) {
-      $this->folders = array();
+      $this->folders = [];
       $this->folders += $this->getCoreNames();
       // Perform an ExtensionDiscovery scan as we cannot use drupal_get_path()
       // yet because the system module may not yet be enabled during install.
@@ -163,7 +163,7 @@ protected function getAllFolders() {
           // during the module scan.
           // @todo Remove as part of https://www.drupal.org/node/2186491
           drupal_get_filename('profile', $profile, $profile_list[$profile]->getPathname());
-          $this->folders += $this->getComponentNames(array($profile_list[$profile]));
+          $this->folders += $this->getComponentNames([$profile_list[$profile]]);
         }
       }
       // @todo Remove as part of https://www.drupal.org/node/2186491
@@ -185,7 +185,7 @@ protected function getAllFolders() {
   public function getComponentNames(array $list) {
     $extension = '.' . $this->getFileExtension();
     $pattern = '/' . preg_quote($extension, '/') . '$/';
-    $folders = array();
+    $folders = [];
     foreach ($list as $extension_object) {
       // We don't have to use ExtensionDiscovery here because our list of
       // extensions was already obtained through an ExtensionDiscovery scan.
@@ -216,7 +216,7 @@ public function getComponentNames(array $list) {
   public function getCoreNames() {
     $extension = '.' . $this->getFileExtension();
     $pattern = '/' . preg_quote($extension, '/') . '$/';
-    $folders = array();
+    $folders = [];
     $directory = $this->getCoreFolder();
     if (is_dir($directory)) {
       // glob() directly calls into libc glob(), which is not aware of PHP
diff --git a/core/lib/Drupal/Core/Config/NullStorage.php b/core/lib/Drupal/Core/Config/NullStorage.php
index 796603368fe2fb0536421328899cee5b32913b77..0dd14730a21ceb6e78b485972f5136d01b6fab92 100644
--- a/core/lib/Drupal/Core/Config/NullStorage.php
+++ b/core/lib/Drupal/Core/Config/NullStorage.php
@@ -29,14 +29,14 @@ public function exists($name) {
    * {@inheritdoc}
    */
   public function read($name) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function readMultiple(array $names) {
-    return array();
+    return [];
   }
 
   /**
@@ -78,7 +78,7 @@ public function decode($raw) {
    * {@inheritdoc}
    */
   public function listAll($prefix = '') {
-    return array();
+    return [];
   }
 
   /**
@@ -99,7 +99,7 @@ public function createCollection($collection) {
    * {@inheritdoc}
    */
   public function getAllCollectionNames() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/PreExistingConfigException.php b/core/lib/Drupal/Core/Config/PreExistingConfigException.php
index 4c19dfaff4295dfff4330dd6aa0a7199acaba98f..57f54b29656d71992c50d62654ba64b764548b4a 100644
--- a/core/lib/Drupal/Core/Config/PreExistingConfigException.php
+++ b/core/lib/Drupal/Core/Config/PreExistingConfigException.php
@@ -57,10 +57,10 @@ public function getExtension() {
    */
   public static function create($extension, array $config_objects) {
     $message = SafeMarkup::format('Configuration objects (@config_names) provided by @extension already exist in active configuration',
-      array(
+      [
         '@config_names' => implode(', ', static::flattenConfigObjects($config_objects)),
         '@extension' => $extension
-      )
+      ]
     );
     $e = new static($message);
     $e->configObjects = $config_objects;
@@ -80,7 +80,7 @@ public static function create($extension, array $config_objects) {
    *   collection.
    */
   public static function flattenConfigObjects(array $config_objects) {
-    $flat_config_objects = array();
+    $flat_config_objects = [];
     foreach ($config_objects as $collection => $config_names) {
       $config_names = array_map(function ($config_name) use ($collection) {
         if ($collection != StorageInterface::DEFAULT_COLLECTION) {
diff --git a/core/lib/Drupal/Core/Config/Schema/ArrayElement.php b/core/lib/Drupal/Core/Config/Schema/ArrayElement.php
index 7fc6cc515322c129de7eba4ae87ebbbc7b1df444..c5076554475dd4a79933ac399207b31d34b7be42 100644
--- a/core/lib/Drupal/Core/Config/Schema/ArrayElement.php
+++ b/core/lib/Drupal/Core/Config/Schema/ArrayElement.php
@@ -19,7 +19,7 @@ abstract class ArrayElement extends Element implements \IteratorAggregate, Typed
    *   Array of valid configuration data keys.
    */
   protected function getAllKeys() {
-    return is_array($this->value) ? array_keys($this->value) : array();
+    return is_array($this->value) ? array_keys($this->value) : [];
   }
 
   /**
@@ -29,7 +29,7 @@ protected function getAllKeys() {
    *   An array of elements contained in this element.
    */
   protected function parse() {
-    $elements = array();
+    $elements = [];
     foreach ($this->getAllKeys() as $key) {
       $value = isset($this->value[$key]) ? $this->value[$key] : NULL;
       $definition = $this->getElementDefinition($key);
@@ -96,7 +96,7 @@ public function isEmpty() {
    * {@inheritdoc}
    */
   public function toArray() {
-    return isset($this->value) ? $this->value : array();
+    return isset($this->value) ? $this->value : [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/Schema/ConfigSchemaDiscovery.php b/core/lib/Drupal/Core/Config/Schema/ConfigSchemaDiscovery.php
index f74cc91c1eecfd4a210206162ef99f1201a0bd51..b086c62cbb56d6dc17151695f8d098d8dd26987b 100644
--- a/core/lib/Drupal/Core/Config/Schema/ConfigSchemaDiscovery.php
+++ b/core/lib/Drupal/Core/Config/Schema/ConfigSchemaDiscovery.php
@@ -34,7 +34,7 @@ function __construct(StorageInterface $schema_storage) {
    * {@inheritdoc}
    */
   public function getDefinitions() {
-    $definitions = array();
+    $definitions = [];
     foreach ($this->schemaStorage->readMultiple($this->schemaStorage->listAll()) as $schema) {
       foreach ($schema as $type => $definition) {
         $definitions[$type] = $definition;
diff --git a/core/lib/Drupal/Core/Config/Schema/Mapping.php b/core/lib/Drupal/Core/Config/Schema/Mapping.php
index 2f4b58f8eb7e6ccb91f9137029ba2b07d2700e44..220a350490e29b5d569cb46a2a2d7cf1b0506331 100644
--- a/core/lib/Drupal/Core/Config/Schema/Mapping.php
+++ b/core/lib/Drupal/Core/Config/Schema/Mapping.php
@@ -22,7 +22,7 @@ class Mapping extends ArrayElement {
    */
   protected function getElementDefinition($key) {
     $value = isset($this->value[$key]) ? $this->value[$key] : NULL;
-    $definition = isset($this->definition['mapping'][$key]) ? $this->definition['mapping'][$key] : array();
+    $definition = isset($this->definition['mapping'][$key]) ? $this->definition['mapping'][$key] : [];
     return $this->buildDataDefinition($definition, $value, $key);
   }
 
diff --git a/core/lib/Drupal/Core/Config/Schema/SchemaCheckTrait.php b/core/lib/Drupal/Core/Config/Schema/SchemaCheckTrait.php
index 972eda438388142ba8b6e7249437d1963c0cab01..9230281f55d8eb7c71dea6458893f9ffbd0a3539 100644
--- a/core/lib/Drupal/Core/Config/Schema/SchemaCheckTrait.php
+++ b/core/lib/Drupal/Core/Config/Schema/SchemaCheckTrait.php
@@ -58,7 +58,7 @@ public function checkConfigSchema(TypedConfigManagerInterface $typed_config, $co
     $definition = $typed_config->getDefinition($config_name);
     $data_definition = $typed_config->buildDataDefinition($definition, $config_data);
     $this->schema = $typed_config->create($data_definition, $config_data);
-    $errors = array();
+    $errors = [];
     foreach ($config_data as $key => $value) {
       $errors = array_merge($errors, $this->checkValue($key, $value));
     }
@@ -83,12 +83,12 @@ protected function checkValue($key, $value) {
     $error_key = $this->configName . ':' . $key;
     $element = $this->schema->get($key);
     if ($element instanceof Undefined) {
-      return array($error_key => 'missing schema');
+      return [$error_key => 'missing schema'];
     }
 
     // Do not check value if it is defined to be ignored.
     if ($element && $element instanceof Ignore) {
-      return array();
+      return [];
     }
 
     if ($element && is_scalar($value) || $value === NULL) {
@@ -110,11 +110,11 @@ protected function checkValue($key, $value) {
       }
       $class = get_class($element);
       if (!$success) {
-        return array($error_key => "variable type is $type but applied schema class is $class");
+        return [$error_key => "variable type is $type but applied schema class is $class"];
       }
     }
     else {
-      $errors = array();
+      $errors = [];
       if (!$element instanceof TraversableTypedDataInterface) {
         $errors[$error_key] = 'non-scalar value but not defined as an array (such as mapping or sequence)';
       }
@@ -131,7 +131,7 @@ protected function checkValue($key, $value) {
       return $errors;
     }
     // No errors found.
-    return array();
+    return [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Config/Schema/Sequence.php b/core/lib/Drupal/Core/Config/Schema/Sequence.php
index e03427e6b738c9ba898111631d8ce0bc1b7a2404..ce8dc1bc0b2690412b504d46922cc61b87330e92 100644
--- a/core/lib/Drupal/Core/Config/Schema/Sequence.php
+++ b/core/lib/Drupal/Core/Config/Schema/Sequence.php
@@ -19,7 +19,7 @@ class Sequence extends ArrayElement {
   protected function getElementDefinition($key) {
     $value = isset($this->value[$key]) ? $this->value[$key] : NULL;
     // @todo: Remove BC layer for sequence with hyphen in front. https://www.drupal.org/node/2444979
-    $definition = array();
+    $definition = [];
     if (isset($this->definition['sequence'][0])) {
       $definition = $this->definition['sequence'][0];
     }
diff --git a/core/lib/Drupal/Core/Config/StorableConfigBase.php b/core/lib/Drupal/Core/Config/StorableConfigBase.php
index 40a25ef306b8205a528b6b1dba0c7e13e21a845f..4b227c9efbdce2575527e3ccab85b7f4aa0fc264 100644
--- a/core/lib/Drupal/Core/Config/StorableConfigBase.php
+++ b/core/lib/Drupal/Core/Config/StorableConfigBase.php
@@ -55,7 +55,7 @@ abstract class StorableConfigBase extends ConfigBase {
    *
    * @var array
    */
-  protected $originalData = array();
+  protected $originalData = [];
 
   /**
    * Saves the configuration object.
diff --git a/core/lib/Drupal/Core/Config/StorageComparer.php b/core/lib/Drupal/Core/Config/StorageComparer.php
index bf071de300ed54550c968c00d6b009d23873d1b9..55aeebc561f3d78a7774ce35bf8e0e7567419f6d 100644
--- a/core/lib/Drupal/Core/Config/StorageComparer.php
+++ b/core/lib/Drupal/Core/Config/StorageComparer.php
@@ -63,7 +63,7 @@ class StorageComparer implements StorageComparerInterface {
    *
    * @var array
    */
-  protected $sourceNames = array();
+  protected $sourceNames = [];
 
   /**
    * Sorted list of all the configuration object names in the target storage.
@@ -72,7 +72,7 @@ class StorageComparer implements StorageComparerInterface {
    *
    * @var array
    */
-  protected $targetNames = array();
+  protected $targetNames = [];
 
   /**
    * A memory cache backend to statically cache source configuration data.
@@ -149,12 +149,12 @@ public function getTargetStorage($collection = StorageInterface::DEFAULT_COLLECT
    * {@inheritdoc}
    */
   public function getEmptyChangelist() {
-    return array(
-      'create' => array(),
-      'update' => array(),
-      'delete' => array(),
-      'rename' => array(),
-    );
+    return [
+      'create' => [],
+      'update' => [],
+      'delete' => [],
+      'rename' => [],
+    ];
   }
 
   /**
@@ -254,7 +254,7 @@ protected function addChangelistCreate($collection) {
    *   The storage collection to operate on.
    */
   protected function addChangelistUpdate($collection) {
-    $recreates = array();
+    $recreates = [];
     foreach (array_intersect($this->sourceNames[$collection], $this->targetNames[$collection]) as $name) {
       $source_data = $this->getSourceStorage($collection)->read($name);
       $target_data = $this->getTargetStorage($collection)->read($name);
@@ -266,7 +266,7 @@ protected function addChangelistUpdate($collection) {
           $recreates[] = $name;
         }
         else {
-          $this->addChangeList($collection, 'update', array($name));
+          $this->addChangeList($collection, 'update', [$name]);
         }
       }
     }
@@ -298,7 +298,7 @@ protected function addChangelistRename($collection) {
       return;
     }
 
-    $create_uuids = array();
+    $create_uuids = [];
     foreach ($this->sourceNames[$collection] as $name) {
       $data = $this->getSourceStorage($collection)->read($name);
       if (isset($data['uuid']) && in_array($name, $create_list)) {
@@ -309,7 +309,7 @@ protected function addChangelistRename($collection) {
       return;
     }
 
-    $renames = array();
+    $renames = [];
 
     // Renames should be ordered so that dependencies are renamed last. This
     // ensures that if there is logic in the configuration entity class to keep
@@ -357,15 +357,15 @@ protected function removeFromChangelist($collection, $op, $name) {
   public function moveRenameToUpdate($rename, $collection = StorageInterface::DEFAULT_COLLECTION) {
     $names = $this->extractRenameNames($rename);
     $this->removeFromChangelist($collection, 'rename', $rename);
-    $this->addChangeList($collection, 'update', array($names['new_name']), $this->sourceNames[$collection]);
+    $this->addChangeList($collection, 'update', [$names['new_name']], $this->sourceNames[$collection]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function reset() {
-    $this->changelist = array(StorageInterface::DEFAULT_COLLECTION => $this->getEmptyChangelist());
-    $this->sourceNames = $this->targetNames = array();
+    $this->changelist = [StorageInterface::DEFAULT_COLLECTION => $this->getEmptyChangelist()];
+    $this->sourceNames = $this->targetNames = [];
     // Reset the static configuration data caches.
     $this->sourceCacheStorage->deleteAll();
     $this->targetCacheStorage->deleteAll();
@@ -377,7 +377,7 @@ public function reset() {
    */
   public function hasChanges() {
     foreach ($this->getAllCollectionNames() as $collection) {
-      foreach (array('delete', 'create', 'update', 'rename') as $op) {
+      foreach (['delete', 'create', 'update', 'rename'] as $op) {
         if (!empty($this->changelist[$collection][$op])) {
           return TRUE;
         }
@@ -442,10 +442,10 @@ protected function createRenameName($name1, $name2) {
    */
   public function extractRenameNames($name) {
     $names = explode('::', $name, 2);
-    return array(
+    return [
       'old_name' => $names[0],
       'new_name' => $names[1],
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/TypedConfigManager.php b/core/lib/Drupal/Core/Config/TypedConfigManager.php
index b90e463a60434831835fa66695a622183bc73f28..22795ad6fffdc4554a568de3ffa25cd1a4c4620d 100644
--- a/core/lib/Drupal/Core/Config/TypedConfigManager.php
+++ b/core/lib/Drupal/Core/Config/TypedConfigManager.php
@@ -79,13 +79,13 @@ public function get($name) {
    */
   public function buildDataDefinition(array $definition, $value, $name = NULL, $parent = NULL) {
     // Add default values for data type and replace variables.
-    $definition += array('type' => 'undefined');
+    $definition += ['type' => 'undefined'];
 
     $replace = [];
     $type = $definition['type'];
     if (strpos($type, ']')) {
       // Replace variable names in definition.
-      $replace = is_array($value) ? $value : array();
+      $replace = is_array($value) ? $value : [];
       if (isset($parent)) {
         $replace['%parent'] = $parent;
       }
@@ -161,7 +161,7 @@ protected function getDefinitionWithReplacements($base_plugin_id, array $replace
       $merge = $this->getDefinition($definition['type'], $exception_on_invalid);
       // Preserve integer keys on merge, so sequence item types can override
       // parent settings as opposed to adding unused second, third, etc. items.
-      $definition = NestedArray::mergeDeepArray(array($merge, $definition), TRUE);
+      $definition = NestedArray::mergeDeepArray([$merge, $definition], TRUE);
 
       // Replace dynamic portions of the definition type.
       if (!empty($replacements) && strpos($definition['type'], ']')) {
@@ -181,10 +181,10 @@ protected function getDefinitionWithReplacements($base_plugin_id, array $replace
       $this->definitions[$type] = $definition;
     }
     // Add type and default definition class.
-    $definition += array(
+    $definition += [
       'definition_class' => '\Drupal\Core\TypedData\DataDefinition',
       'type' => $type,
-    );
+    ];
     return $definition;
   }
 
@@ -270,7 +270,7 @@ protected function getFallbackName($name) {
   protected function replaceName($name, $data) {
     if (preg_match_all("/\[(.*)\]/U", $name, $matches)) {
       // Build our list of '[value]' => replacement.
-      $replace = array();
+      $replace = [];
       foreach (array_combine($matches[0], $matches[1]) as $key => $value) {
         $replace[$key] = $this->replaceVariable($value, $data);
       }
diff --git a/core/lib/Drupal/Core/Config/UnmetDependenciesException.php b/core/lib/Drupal/Core/Config/UnmetDependenciesException.php
index 9ce487b34f66a052fb376d010651a6d8bea9e2e7..6c37c76372058bb4ce20c89c32db919535da63b4 100644
--- a/core/lib/Drupal/Core/Config/UnmetDependenciesException.php
+++ b/core/lib/Drupal/Core/Config/UnmetDependenciesException.php
@@ -90,10 +90,10 @@ public function getTranslatedMessage(TranslationInterface $string_translation, $
    */
   public static function create($extension, array $config_objects) {
     $message = new FormattableMarkup('Configuration objects provided by %extension have unmet dependencies: %config_names',
-      array(
+      [
         '%config_names' => static::formatConfigObjectList($config_objects),
         '%extension' => $extension
-      )
+      ]
     );
     $e = new static($message);
     $e->configObjects = $config_objects;
diff --git a/core/lib/Drupal/Core/Controller/ControllerResolver.php b/core/lib/Drupal/Core/Controller/ControllerResolver.php
index 3a1d8684acb9d8211dedeb833a284d62ec786457..c16a087449b0151fb216bf995f201c3ee46d1ff8 100644
--- a/core/lib/Drupal/Core/Controller/ControllerResolver.php
+++ b/core/lib/Drupal/Core/Controller/ControllerResolver.php
@@ -122,7 +122,7 @@ protected function createController($controller) {
 
     $controller = $this->classResolver->getInstanceFromDefinition($class_or_service);
 
-    return array($controller, $method);
+    return [$controller, $method];
   }
 
   /**
@@ -131,7 +131,7 @@ protected function createController($controller) {
   protected function doGetArguments(Request $request, $controller, array $parameters) {
     $attributes = $request->attributes->all();
     $raw_parameters = $request->attributes->has('_raw_variables') ? $request->attributes->get('_raw_variables') : [];
-    $arguments = array();
+    $arguments = [];
     foreach ($parameters as $param) {
       if (array_key_exists($param->name, $attributes)) {
         $arguments[] = $attributes[$param->name];
diff --git a/core/lib/Drupal/Core/Controller/TitleResolver.php b/core/lib/Drupal/Core/Controller/TitleResolver.php
index e5e5fcebf584922364152d3bce6f22519c8cb14e..954835d7549a1447ba977eae6a7de006ab01c26e 100644
--- a/core/lib/Drupal/Core/Controller/TitleResolver.php
+++ b/core/lib/Drupal/Core/Controller/TitleResolver.php
@@ -47,11 +47,11 @@ public function getTitle(Request $request, Route $route) {
       $route_title = call_user_func_array($callable, $arguments);
     }
     elseif ($title = $route->getDefault('_title')) {
-      $options = array();
+      $options = [];
       if ($context = $route->getDefault('_title_context')) {
         $options['context'] = $context;
       }
-      $args = array();
+      $args = [];
       if (($raw_parameters = $request->attributes->get('_raw_variables'))) {
         foreach ($raw_parameters->all() as $key => $value) {
           $args['@' . $key] = $value;
diff --git a/core/lib/Drupal/Core/Database/Connection.php b/core/lib/Drupal/Core/Database/Connection.php
index daf4668c16e9aaa3f38083339192ff8896be4e35..f6963c585b774ec5ca94a3a7036ecf1b95a1e913 100644
--- a/core/lib/Drupal/Core/Database/Connection.php
+++ b/core/lib/Drupal/Core/Database/Connection.php
@@ -50,14 +50,14 @@ abstract class Connection {
    *
    * @var array
    */
-  protected $transactionLayers = array();
+  protected $transactionLayers = [];
 
   /**
    * Index of what driver-specific class to use for various operations.
    *
    * @var array
    */
-  protected $driverClasses = array();
+  protected $driverClasses = [];
 
   /**
    * The name of the Statement class for this connection.
@@ -101,7 +101,7 @@ abstract class Connection {
    *
    * @var array
    */
-  protected $connectionOptions = array();
+  protected $connectionOptions = [];
 
   /**
    * The schema object for this connection.
@@ -117,21 +117,21 @@ abstract class Connection {
    *
    * @var array
    */
-  protected $prefixes = array();
+  protected $prefixes = [];
 
   /**
    * List of search values for use in prefixTables().
    *
    * @var array
    */
-  protected $prefixSearch = array();
+  protected $prefixSearch = [];
 
   /**
    * List of replacement values for use in prefixTables().
    *
    * @var array
    */
-  protected $prefixReplace = array();
+  protected $prefixReplace = [];
 
   /**
    * List of un-prefixed table names, keyed by prefixed table names.
@@ -171,7 +171,7 @@ public function __construct(\PDO $connection, array $connection_options) {
 
     // Set a Statement class, unless the driver opted out.
     if (!empty($this->statementClass)) {
-      $connection->setAttribute(\PDO::ATTR_STATEMENT_CLASS, array($this->statementClass, array($this)));
+      $connection->setAttribute(\PDO::ATTR_STATEMENT_CLASS, [$this->statementClass, [$this]]);
     }
 
     $this->connection = $connection;
@@ -187,7 +187,7 @@ public function __construct(\PDO $connection, array $connection_options) {
    * @return \PDO
    *   A \PDO object.
    */
-  public static function open(array &$connection_options = array()) { }
+  public static function open(array &$connection_options = []) { }
 
   /**
    * Destroys this Connection object.
@@ -202,7 +202,7 @@ public function destroy() {
     // The Statement class attribute only accepts a new value that presents a
     // proper callable, so we reset it to PDOStatement.
     if (!empty($this->statementClass)) {
-      $this->connection->setAttribute(\PDO::ATTR_STATEMENT_CLASS, array('PDOStatement', array()));
+      $this->connection->setAttribute(\PDO::ATTR_STATEMENT_CLASS, ['PDOStatement', []]);
     }
     $this->schema = NULL;
   }
@@ -259,13 +259,13 @@ public function destroy() {
    *   An array of default query options.
    */
   protected function defaultOptions() {
-    return array(
+    return [
       'target' => 'default',
       'fetch' => \PDO::FETCH_OBJ,
       'return' => Database::RETURN_STATEMENT,
       'throw_exception' => TRUE,
       'allow_delimiter_in_query' => FALSE,
-    );
+    ];
   }
 
   /**
@@ -293,16 +293,16 @@ public function getConnectionOptions() {
    */
   protected function setPrefix($prefix) {
     if (is_array($prefix)) {
-      $this->prefixes = $prefix + array('default' => '');
+      $this->prefixes = $prefix + ['default' => ''];
     }
     else {
-      $this->prefixes = array('default' => $prefix);
+      $this->prefixes = ['default' => $prefix];
     }
 
     // Set up variables for use in prefixTables(). Replace table-specific
     // prefixes first.
-    $this->prefixSearch = array();
-    $this->prefixReplace = array();
+    $this->prefixSearch = [];
+    $this->prefixReplace = [];
     foreach ($this->prefixes as $key => $val) {
       if ($key != 'default') {
         $this->prefixSearch[] = '{' . $key . '}';
@@ -596,7 +596,7 @@ protected function filterComment($comment = '') {
    *
    * @see \Drupal\Core\Database\Connection::defaultOptions()
    */
-  public function query($query, array $args = array(), $options = array()) {
+  public function query($query, array $args = [], $options = []) {
     // Use default values if not already set.
     $options += $this->defaultOptions();
 
@@ -670,7 +670,7 @@ public function query($query, array $args = array(), $options = array()) {
    * @throws \Drupal\Core\Database\DatabaseExceptionWrapper
    * @throws \Drupal\Core\Database\IntegrityConstraintViolationException
    */
-  protected function handleQueryException(\PDOException $e, $query, array $args = array(), $options = array()) {
+  protected function handleQueryException(\PDOException $e, $query, array $args = [], $options = []) {
     if ($options['throw_exception']) {
       // Wrap the exception in another exception, because PHP does not allow
       // overriding Exception::getMessage(). Its message is the extra database
@@ -732,7 +732,7 @@ protected function expandArguments(&$query, &$args) {
       }
       // Handle expansion of arrays.
       $key_name = str_replace('[]', '__', $key);
-      $new_keys = array();
+      $new_keys = [];
       // We require placeholders to have trailing brackets if the developer
       // intends them to be expanded to an array to make the intent explicit.
       foreach (array_values($data) as $i => $value) {
@@ -796,7 +796,7 @@ public function getDriverClass($class) {
    *
    * @see \Drupal\Core\Database\Query\Select
    */
-  public function select($table, $alias = NULL, array $options = array()) {
+  public function select($table, $alias = NULL, array $options = []) {
     $class = $this->getDriverClass('Select');
     return new $class($table, $alias, $this, $options);
   }
@@ -814,7 +814,7 @@ public function select($table, $alias = NULL, array $options = array()) {
    *
    * @see \Drupal\Core\Database\Query\Insert
    */
-  public function insert($table, array $options = array()) {
+  public function insert($table, array $options = []) {
     $class = $this->getDriverClass('Insert');
     return new $class($this, $table, $options);
   }
@@ -832,7 +832,7 @@ public function insert($table, array $options = array()) {
    *
    * @see \Drupal\Core\Database\Query\Merge
    */
-  public function merge($table, array $options = array()) {
+  public function merge($table, array $options = []) {
     $class = $this->getDriverClass('Merge');
     return new $class($this, $table, $options);
   }
@@ -850,7 +850,7 @@ public function merge($table, array $options = array()) {
    *
    * @see \Drupal\Core\Database\Query\Upsert
    */
-  public function upsert($table, array $options = array()) {
+  public function upsert($table, array $options = []) {
     $class = $this->getDriverClass('Upsert');
     return new $class($this, $table, $options);
   }
@@ -868,7 +868,7 @@ public function upsert($table, array $options = array()) {
    *
    * @see \Drupal\Core\Database\Query\Update
    */
-  public function update($table, array $options = array()) {
+  public function update($table, array $options = []) {
     $class = $this->getDriverClass('Update');
     return new $class($this, $table, $options);
   }
@@ -886,7 +886,7 @@ public function update($table, array $options = array()) {
    *
    * @see \Drupal\Core\Database\Query\Delete
    */
-  public function delete($table, array $options = array()) {
+  public function delete($table, array $options = []) {
     $class = $this->getDriverClass('Delete');
     return new $class($this, $table, $options);
   }
@@ -904,7 +904,7 @@ public function delete($table, array $options = array()) {
    *
    * @see \Drupal\Core\Database\Query\Truncate
    */
-  public function truncate($table, array $options = array()) {
+  public function truncate($table, array $options = []) {
     $class = $this->getDriverClass('Truncate');
     return new $class($this, $table, $options);
   }
@@ -1237,7 +1237,7 @@ protected function popCommittableTransactions() {
    *   A database query result resource, or NULL if the query was not executed
    *   correctly.
    */
-  abstract public function queryRange($query, $from, $count, array $args = array(), array $options = array());
+  abstract public function queryRange($query, $from, $count, array $args = [], array $options = []);
 
   /**
    * Generates a temporary table name.
@@ -1274,7 +1274,7 @@ protected function generateTemporaryTableName() {
    * @return string
    *   The name of the temporary table.
    */
-  abstract function queryTemporary($query, array $args = array(), array $options = array());
+  abstract function queryTemporary($query, array $args = [], array $options = []);
 
   /**
    * Returns the type of database driver.
@@ -1421,7 +1421,7 @@ abstract public function nextId($existing_id = 0);
    *
    * @see \PDO::prepare()
    */
-  public function prepare($statement, array $driver_options = array()) {
+  public function prepare($statement, array $driver_options = []) {
     return $this->connection->prepare($statement, $driver_options);
   }
 
diff --git a/core/lib/Drupal/Core/Database/Database.php b/core/lib/Drupal/Core/Database/Database.php
index 8fe1c453eab192b650292dd9ad66dccdeb252555..dd19018828bc4ef3557f81f0ab07db586498d5b4 100644
--- a/core/lib/Drupal/Core/Database/Database.php
+++ b/core/lib/Drupal/Core/Database/Database.php
@@ -40,21 +40,21 @@ abstract class Database {
    *
    * @var array
    */
-  static protected $connections = array();
+  static protected $connections = [];
 
   /**
    * A processed copy of the database connection information from settings.php.
    *
    * @var array
    */
-  static protected $databaseInfo = array();
+  static protected $databaseInfo = [];
 
   /**
    * A list of key/target credentials to simply ignore.
    *
    * @var array
    */
-  static protected $ignoreTargets = array();
+  static protected $ignoreTargets = [];
 
   /**
    * The key of the currently active database connection.
@@ -75,7 +75,7 @@ abstract class Database {
    *
    * @var array
    */
-  static protected $logs = array();
+  static protected $logs = [];
 
   /**
    * Starts logging a given logging key on the specified connection.
@@ -214,15 +214,15 @@ final public static function parseConnectionInfo(array $info) {
     // Parse the prefix information.
     if (!isset($info['prefix'])) {
       // Default to an empty prefix.
-      $info['prefix'] = array(
+      $info['prefix'] = [
         'default' => '',
-      );
+      ];
     }
     elseif (!is_array($info['prefix'])) {
       // Transform the flat form into an array form.
-      $info['prefix'] = array(
+      $info['prefix'] = [
         'default' => $info['prefix'],
-      );
+      ];
     }
     return $info;
   }
@@ -459,11 +459,11 @@ public static function convertDbUrlToConnectionInfo($url, $root) {
     if (!isset($info['scheme'], $info['host'], $info['path'])) {
       throw new \InvalidArgumentException('Minimum requirement: driver://host/database');
     }
-    $info += array(
+    $info += [
       'user' => '',
       'pass' => '',
       'fragment' => '',
-    );
+    ];
 
     // A SQLite database path with two leading slashes indicates a system path.
     // Otherwise the path is relative to the Drupal root.
@@ -474,13 +474,13 @@ public static function convertDbUrlToConnectionInfo($url, $root) {
       $info['path'] = $root . '/' . $info['path'];
     }
 
-    $database = array(
+    $database = [
       'driver' => $info['scheme'],
       'username' => $info['user'],
       'password' => $info['pass'],
       'host' => $info['host'],
       'database' => $info['path'],
-    );
+    ];
     if (isset($info['port'])) {
       $database['port'] = $info['port'];
     }
diff --git a/core/lib/Drupal/Core/Database/Driver/mysql/Connection.php b/core/lib/Drupal/Core/Database/Driver/mysql/Connection.php
index fd464388a1ed601a86629ac2e5f14ccbe3a7973a..164f68a947c21197de52a098551cda853d214a74 100644
--- a/core/lib/Drupal/Core/Database/Driver/mysql/Connection.php
+++ b/core/lib/Drupal/Core/Database/Driver/mysql/Connection.php
@@ -67,7 +67,7 @@ class Connection extends DatabaseConnection {
   /**
    * Constructs a Connection object.
    */
-  public function __construct(\PDO $connection, array $connection_options = array()) {
+  public function __construct(\PDO $connection, array $connection_options = []) {
     parent::__construct($connection, $connection_options);
 
     // This driver defaults to transaction support, except if explicitly passed FALSE.
@@ -82,7 +82,7 @@ public function __construct(\PDO $connection, array $connection_options = array(
   /**
    * {@inheritdoc}
    */
-  public function query($query, array $args = array(), $options = array()) {
+  public function query($query, array $args = [], $options = []) {
     try {
       return parent::query($query, $args, $options);
     }
@@ -101,7 +101,7 @@ public function query($query, array $args = array(), $options = array()) {
   /**
    * {@inheritdoc}
    */
-  public static function open(array &$connection_options = array()) {
+  public static function open(array &$connection_options = []) {
     if (isset($connection_options['_dsn_utf8_fallback']) && $connection_options['_dsn_utf8_fallback'] === TRUE) {
       // Only used during the installer version check, as a fallback from utf8mb4.
       $charset = 'utf8';
@@ -125,10 +125,10 @@ public static function open(array &$connection_options = array()) {
       $dsn .= ';dbname=' . $connection_options['database'];
     }
     // Allow PDO options to be overridden.
-    $connection_options += array(
-      'pdo' => array(),
-    );
-    $connection_options['pdo'] += array(
+    $connection_options += [
+      'pdo' => [],
+    ];
+    $connection_options['pdo'] += [
       \PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
       // So we don't have to mess around with cursors and unbuffered queries by default.
       \PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => TRUE,
@@ -138,7 +138,7 @@ public static function open(array &$connection_options = array()) {
       \PDO::MYSQL_ATTR_FOUND_ROWS => TRUE,
       // Because MySQL's prepared statements skip the query cache, because it's dumb.
       \PDO::ATTR_EMULATE_PREPARES => TRUE,
-    );
+    ];
     if (defined('\PDO::MYSQL_ATTR_MULTI_STATEMENTS')) {
       // An added connection option in PHP 5.5.21 to optionally limit SQL to a
       // single statement like mysqli.
@@ -176,12 +176,12 @@ public static function open(array &$connection_options = array()) {
     // https://www.drupal.org/node/344575 for further discussion. Also, as MySQL
     // 5.5 changed the meaning of TRADITIONAL we need to spell out the modes one
     // by one.
-    $connection_options += array(
-      'init_commands' => array(),
-    );
-    $connection_options['init_commands'] += array(
+    $connection_options += [
+      'init_commands' => [],
+    ];
+    $connection_options['init_commands'] += [
       'sql_mode' => "SET sql_mode = 'ANSI,STRICT_TRANS_TABLES,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,ONLY_FULL_GROUP_BY'",
-    );
+    ];
     // Execute initial commands.
     foreach ($connection_options['init_commands'] as $sql) {
       $pdo->exec($sql);
@@ -212,11 +212,11 @@ public function __destruct() {
     }
   }
 
-  public function queryRange($query, $from, $count, array $args = array(), array $options = array()) {
+  public function queryRange($query, $from, $count, array $args = [], array $options = []) {
     return $this->query($query . ' LIMIT ' . (int) $from . ', ' . (int) $count, $args, $options);
   }
 
-  public function queryTemporary($query, array $args = array(), array $options = array()) {
+  public function queryTemporary($query, array $args = [], array $options = []) {
     $tablename = $this->generateTemporaryTableName();
     $this->query('CREATE TEMPORARY TABLE {' . $tablename . '} Engine=MEMORY ' . $query, $args, $options);
     return $tablename;
@@ -258,7 +258,7 @@ public function mapConditionOperator($operator) {
   }
 
   public function nextId($existing_id = 0) {
-    $new_id = $this->query('INSERT INTO {sequences} () VALUES ()', array(), array('return' => Database::RETURN_INSERT_ID));
+    $new_id = $this->query('INSERT INTO {sequences} () VALUES ()', [], ['return' => Database::RETURN_INSERT_ID]);
     // This should only happen after an import or similar event.
     if ($existing_id >= $new_id) {
       // If we INSERT a value manually into the sequences table, on the next
@@ -268,8 +268,8 @@ public function nextId($existing_id = 0) {
       // other than duplicate keys. Instead, we use INSERT ... ON DUPLICATE KEY
       // UPDATE in such a way that the UPDATE does not do anything. This way,
       // duplicate keys do not generate errors but everything else does.
-      $this->query('INSERT INTO {sequences} (value) VALUES (:value) ON DUPLICATE KEY UPDATE value = value', array(':value' => $existing_id));
-      $new_id = $this->query('INSERT INTO {sequences} () VALUES ()', array(), array('return' => Database::RETURN_INSERT_ID));
+      $this->query('INSERT INTO {sequences} (value) VALUES (:value) ON DUPLICATE KEY UPDATE value = value', [':value' => $existing_id]);
+      $new_id = $this->query('INSERT INTO {sequences} () VALUES ()', [], ['return' => Database::RETURN_INSERT_ID]);
     }
     $this->needsCleanup = TRUE;
     return $new_id;
@@ -287,7 +287,7 @@ public function nextIdDelete() {
     try {
       $max_id = $this->query('SELECT MAX(value) FROM {sequences}')->fetchField();
       // We know we are using MySQL here, no need for the slower db_delete().
-      $this->query('DELETE FROM {sequences} WHERE value < :value', array(':value' => $max_id));
+      $this->query('DELETE FROM {sequences} WHERE value < :value', [':value' => $max_id]);
     }
     // During testing, this function is called from shutdown with the
     // simpletest prefix stored in $this->connection, and those tables are gone
@@ -333,7 +333,7 @@ protected function popCommittableTransactions() {
           if ($e->getPrevious()->errorInfo[1] == '1305') {
             // If one SAVEPOINT was released automatically, then all were.
             // Therefore, clean the transaction stack.
-            $this->transactionLayers = array();
+            $this->transactionLayers = [];
             // We also have to explain to PDO that the transaction stack has
             // been cleaned-up.
             $this->connection->commit();
diff --git a/core/lib/Drupal/Core/Database/Driver/mysql/Insert.php b/core/lib/Drupal/Core/Database/Driver/mysql/Insert.php
index 213eb83e6e823dd8c2e4ec67776f5a571663a001..8b7c602e872184ed15c46a815f2c8fb76df2add5 100644
--- a/core/lib/Drupal/Core/Database/Driver/mysql/Insert.php
+++ b/core/lib/Drupal/Core/Database/Driver/mysql/Insert.php
@@ -18,7 +18,7 @@ public function execute() {
     // pass it back, as any remaining options are irrelevant.
     if (empty($this->fromQuery)) {
       $max_placeholder = 0;
-      $values = array();
+      $values = [];
       foreach ($this->insertValues as $insert_values) {
         foreach ($insert_values as $value) {
           $values[':db_insert_placeholder_' . $max_placeholder++] = $value;
@@ -32,7 +32,7 @@ public function execute() {
     $last_insert_id = $this->connection->query((string) $this, $values, $this->queryOptions);
 
     // Re-initialize the values array so that we can re-use this query.
-    $this->insertValues = array();
+    $this->insertValues = [];
 
     return $last_insert_id;
   }
diff --git a/core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php b/core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php
index 40a589c12182fe12ef7327ad8f568915d7826e16..b19af64cb46a89bb7fd0516c51553de532e2c469 100644
--- a/core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php
+++ b/core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php
@@ -33,10 +33,10 @@ class Tasks extends InstallTasks {
    * Constructs a \Drupal\Core\Database\Driver\mysql\Install\Tasks object.
    */
   public function __construct() {
-    $this->tasks[] = array(
-      'arguments' => array(),
+    $this->tasks[] = [
+      'arguments' => [],
       'function' => 'ensureInnoDbAvailable',
-    );
+    ];
   }
 
   /**
@@ -67,7 +67,7 @@ protected function connect() {
       catch (\Exception $e) {
         // Detect utf8mb4 incompability.
         if ($e->getCode() == Connection::UNSUPPORTED_CHARSET || ($e->getCode() == Connection::SQLSTATE_SYNTAX_ERROR && $e->errorInfo[1] == Connection::UNKNOWN_CHARSET)) {
-          $this->fail(t('Your MySQL server and PHP MySQL driver must support utf8mb4 character encoding. Make sure to use a database system that supports this (such as MySQL/MariaDB/Percona 5.5.3 and up), and that the utf8mb4 character set is compiled in. See the <a href=":documentation" target="_blank">MySQL documentation</a> for more information.', array(':documentation' => 'https://dev.mysql.com/doc/refman/5.0/en/cannot-initialize-character-set.html')));
+          $this->fail(t('Your MySQL server and PHP MySQL driver must support utf8mb4 character encoding. Make sure to use a database system that supports this (such as MySQL/MariaDB/Percona 5.5.3 and up), and that the utf8mb4 character set is compiled in. See the <a href=":documentation" target="_blank">MySQL documentation</a> for more information.', [':documentation' => 'https://dev.mysql.com/doc/refman/5.0/en/cannot-initialize-character-set.html']));
           $info = Database::getConnectionInfo();
           $info_copy = $info;
           // Set a flag to fall back to utf8. Note: this flag should only be
@@ -112,13 +112,13 @@ protected function connect() {
         catch (DatabaseNotFoundException $e) {
           // Still no dice; probably a permission issue. Raise the error to the
           // installer.
-          $this->fail(t('Database %database not found. The server reports the following message when attempting to create the database: %error.', array('%database' => $database, '%error' => $e->getMessage())));
+          $this->fail(t('Database %database not found. The server reports the following message when attempting to create the database: %error.', ['%database' => $database, '%error' => $e->getMessage()]));
         }
       }
       else {
         // Database connection failed for some other reason than the database
         // not existing.
-        $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist or does the database user have sufficient privileges to create the database?</li><li>Have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', array('%error' => $e->getMessage())));
+        $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist or does the database user have sufficient privileges to create the database?</li><li>Have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', ['%error' => $e->getMessage()]));
         return FALSE;
       }
     }
@@ -159,13 +159,13 @@ protected function checkEngineVersion() {
       // The mysqlnd driver supports utf8mb4 starting at version 5.0.9.
       $version = preg_replace('/^\D+([\d.]+).*/', '$1', $version);
       if (version_compare($version, self::MYSQLND_MINIMUM_VERSION, '<')) {
-        $this->fail(t("The MySQLnd driver version %version is less than the minimum required version. Upgrade to MySQLnd version %mysqlnd_minimum_version or up, or alternatively switch mysql drivers to libmysqlclient version %libmysqlclient_minimum_version or up.", array('%version' => $version, '%mysqlnd_minimum_version' => self::MYSQLND_MINIMUM_VERSION, '%libmysqlclient_minimum_version' => self::LIBMYSQLCLIENT_MINIMUM_VERSION)));
+        $this->fail(t("The MySQLnd driver version %version is less than the minimum required version. Upgrade to MySQLnd version %mysqlnd_minimum_version or up, or alternatively switch mysql drivers to libmysqlclient version %libmysqlclient_minimum_version or up.", ['%version' => $version, '%mysqlnd_minimum_version' => self::MYSQLND_MINIMUM_VERSION, '%libmysqlclient_minimum_version' => self::LIBMYSQLCLIENT_MINIMUM_VERSION]));
       }
     }
     else {
       // The libmysqlclient driver supports utf8mb4 starting at version 5.5.3.
       if (version_compare($version, self::LIBMYSQLCLIENT_MINIMUM_VERSION, '<')) {
-        $this->fail(t("The libmysqlclient driver version %version is less than the minimum required version. Upgrade to libmysqlclient version %libmysqlclient_minimum_version or up, or alternatively switch mysql drivers to MySQLnd version %mysqlnd_minimum_version or up.", array('%version' => $version, '%libmysqlclient_minimum_version' => self::LIBMYSQLCLIENT_MINIMUM_VERSION, '%mysqlnd_minimum_version' => self::MYSQLND_MINIMUM_VERSION)));
+        $this->fail(t("The libmysqlclient driver version %version is less than the minimum required version. Upgrade to libmysqlclient version %libmysqlclient_minimum_version or up, or alternatively switch mysql drivers to MySQLnd version %mysqlnd_minimum_version or up.", ['%version' => $version, '%libmysqlclient_minimum_version' => self::LIBMYSQLCLIENT_MINIMUM_VERSION, '%mysqlnd_minimum_version' => self::MYSQLND_MINIMUM_VERSION]));
       }
     }
   }
diff --git a/core/lib/Drupal/Core/Database/Driver/mysql/Schema.php b/core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
index c952630d9b7207b1b27c4891e7173d02f7184e20..5dcd487976b2ffe7c3a9e79e9b98f892a56288d4 100644
--- a/core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
+++ b/core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
@@ -33,14 +33,14 @@ class Schema extends DatabaseSchema {
    * @var array
    *   List of MySQL string types.
    */
-  protected $mysqlStringTypes = array(
+  protected $mysqlStringTypes = [
     'VARCHAR',
     'CHAR',
     'TINYTEXT',
     'MEDIUMTEXT',
     'LONGTEXT',
     'TEXT',
-  );
+  ];
 
   /**
    * Get information about the table and database name from the prefix.
@@ -49,7 +49,7 @@ class Schema extends DatabaseSchema {
    *   A keyed array with information about the database, table name and prefix.
    */
   protected function getPrefixInfo($table = 'default', $add_prefix = TRUE) {
-    $info = array('prefix' => $this->connection->tablePrefix($table));
+    $info = ['prefix' => $this->connection->tablePrefix($table)];
     if ($add_prefix) {
       $table = $info['prefix'] . $table;
     }
@@ -95,10 +95,10 @@ protected function createTableSql($name, $table) {
     $info = $this->connection->getConnectionOptions();
 
     // Provide defaults if needed.
-    $table += array(
+    $table += [
       'mysql_engine' => 'InnoDB',
       'mysql_character_set' => 'utf8mb4',
-    );
+    ];
 
     $sql = "CREATE TABLE {" . $name . "} (\n";
 
@@ -130,7 +130,7 @@ protected function createTableSql($name, $table) {
       $sql .= ' COMMENT ' . $this->prepareComment($table['description'], self::COMMENT_MAX_TABLE);
     }
 
-    return array($sql);
+    return [$sql];
   }
 
   /**
@@ -231,7 +231,7 @@ public function getFieldTypeMap() {
     // it much easier for modules (such as schema.module) to map
     // database types back into schema types.
     // $map does not use drupal_static as its value never changes.
-    static $map = array(
+    static $map = [
       'varchar_ascii:normal' => 'VARCHAR',
 
       'varchar:normal'  => 'VARCHAR',
@@ -265,12 +265,12 @@ public function getFieldTypeMap() {
 
       'blob:big'        => 'LONGBLOB',
       'blob:normal'     => 'BLOB',
-    );
+    ];
     return $map;
   }
 
   protected function createKeysSql($spec) {
-    $keys = array();
+    $keys = [];
 
     if (!empty($spec['primary key'])) {
       $keys[] = 'PRIMARY KEY (' . $this->createKeySql($spec['primary key']) . ')';
@@ -349,12 +349,12 @@ protected function shortenIndex(&$index) {
       }
     }
     else {
-      $index = array($index, 191);
+      $index = [$index, 191];
     }
   }
 
   protected function createKeySql($fields) {
-    $return = array();
+    $return = [];
     foreach ($fields as $field) {
       if (is_array($field)) {
         $return[] = '`' . $field[0] . '`(' . $field[1] . ')';
@@ -368,10 +368,10 @@ protected function createKeySql($fields) {
 
   public function renameTable($table, $new_name) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", array('@table' => $table, '@table_new' => $new_name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", ['@table' => $table, '@table_new' => $new_name]));
     }
     if ($this->tableExists($new_name)) {
-      throw new SchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", array('@table' => $table, '@table_new' => $new_name)));
+      throw new SchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", ['@table' => $table, '@table_new' => $new_name]));
     }
 
     $info = $this->getPrefixInfo($new_name);
@@ -387,12 +387,12 @@ public function dropTable($table) {
     return TRUE;
   }
 
-  public function addField($table, $field, $spec, $keys_new = array()) {
+  public function addField($table, $field, $spec, $keys_new = []) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", array('@field' => $field, '@table' => $table)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", ['@field' => $field, '@table' => $table]));
     }
     if ($this->fieldExists($table, $field)) {
-      throw new SchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", array('@field' => $field, '@table' => $table)));
+      throw new SchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", ['@field' => $field, '@table' => $table]));
     }
 
     $fixnull = FALSE;
@@ -408,7 +408,7 @@ public function addField($table, $field, $spec, $keys_new = array()) {
     $this->connection->query($query);
     if (isset($spec['initial'])) {
       $this->connection->update($table)
-        ->fields(array($field => $spec['initial']))
+        ->fields([$field => $spec['initial']])
         ->execute();
     }
     if (isset($spec['initial_from_field'])) {
@@ -433,7 +433,7 @@ public function dropField($table, $field) {
 
   public function fieldSetDefault($table, $field, $default) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", ['@table' => $table, '@field' => $field]));
     }
 
     $this->connection->query('ALTER TABLE {' . $table . '} ALTER COLUMN `' . $field . '` SET DEFAULT ' . $this->escapeDefaultValue($default));
@@ -441,7 +441,7 @@ public function fieldSetDefault($table, $field, $default) {
 
   public function fieldSetNoDefault($table, $field) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot remove default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot remove default value of field @table.@field: field doesn't exist.", ['@table' => $table, '@field' => $field]));
     }
 
     $this->connection->query('ALTER TABLE {' . $table . '} ALTER COLUMN `' . $field . '` DROP DEFAULT');
@@ -456,10 +456,10 @@ public function indexExists($table, $name) {
 
   public function addPrimaryKey($table, $fields) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", array('@table' => $table)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", ['@table' => $table]));
     }
     if ($this->indexExists($table, 'PRIMARY')) {
-      throw new SchemaObjectExistsException(t("Cannot add primary key to table @table: primary key already exists.", array('@table' => $table)));
+      throw new SchemaObjectExistsException(t("Cannot add primary key to table @table: primary key already exists.", ['@table' => $table]));
     }
 
     $this->connection->query('ALTER TABLE {' . $table . '} ADD PRIMARY KEY (' . $this->createKeySql($fields) . ')');
@@ -476,10 +476,10 @@ public function dropPrimaryKey($table) {
 
   public function addUniqueKey($table, $name, $fields) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", ['@table' => $table, '@name' => $name]));
     }
     if ($this->indexExists($table, $name)) {
-      throw new SchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", ['@table' => $table, '@name' => $name]));
     }
 
     $this->connection->query('ALTER TABLE {' . $table . '} ADD UNIQUE KEY `' . $name . '` (' . $this->createKeySql($fields) . ')');
@@ -499,10 +499,10 @@ public function dropUniqueKey($table, $name) {
    */
   public function addIndex($table, $name, $fields, array $spec) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", ['@table' => $table, '@name' => $name]));
     }
     if ($this->indexExists($table, $name)) {
-      throw new SchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", ['@table' => $table, '@name' => $name]));
     }
 
     $spec['indexes'][$name] = $fields;
@@ -520,12 +520,12 @@ public function dropIndex($table, $name) {
     return TRUE;
   }
 
-  public function changeField($table, $field, $field_new, $spec, $keys_new = array()) {
+  public function changeField($table, $field, $field_new, $spec, $keys_new = []) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot change the definition of field @table.@name: field doesn't exist.", array('@table' => $table, '@name' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot change the definition of field @table.@name: field doesn't exist.", ['@table' => $table, '@name' => $field]));
     }
     if (($field != $field_new) && $this->fieldExists($table, $field_new)) {
-      throw new SchemaObjectExistsException(t("Cannot rename field @table.@name to @name_new: target field already exists.", array('@table' => $table, '@name' => $field, '@name_new' => $field_new)));
+      throw new SchemaObjectExistsException(t("Cannot rename field @table.@name to @name_new: target field already exists.", ['@table' => $table, '@name' => $field, '@name_new' => $field_new]));
     }
 
     $sql = 'ALTER TABLE {' . $table . '} CHANGE `' . $field . '` ' . $this->createFieldSql($field_new, $this->processField($spec));
@@ -542,7 +542,7 @@ public function prepareComment($comment, $length = NULL) {
       $comment = Unicode::truncate($this->connection->prefixTables($comment), $length, TRUE, TRUE);
     }
     // Remove semicolons to avoid triggering multi-statement check.
-    $comment = strtr($comment, array(';' => '.'));
+    $comment = strtr($comment, [';' => '.']);
     return $this->connection->quote($comment);
   }
 
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php
index 59f3bd5a49b5a6aebac2d55b0fe47bf7c075b4dc..3769e548590f01a4dffc159bab3ec24007d1764c 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php
@@ -96,7 +96,7 @@ public function __construct(\PDO $connection, array $connection_options) {
   /**
    * {@inheritdoc}
    */
-  public static function open(array &$connection_options = array()) {
+  public static function open(array &$connection_options = []) {
     // Default to TCP connection on port 5432.
     if (empty($connection_options['port'])) {
       $connection_options['port'] = 5432;
@@ -120,10 +120,10 @@ public static function open(array &$connection_options = array()) {
     $dsn = 'pgsql:host=' . $connection_options['host'] . ' dbname=' . $connection_options['database'] . ' port=' . $connection_options['port'];
 
     // Allow PDO options to be overridden.
-    $connection_options += array(
-      'pdo' => array(),
-    );
-    $connection_options['pdo'] += array(
+    $connection_options += [
+      'pdo' => [],
+    ];
+    $connection_options['pdo'] += [
       \PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
       // Prepared statements are most effective for performance when queries
       // are recycled (used several times). However, if they are not re-used,
@@ -134,7 +134,7 @@ public static function open(array &$connection_options = array()) {
       \PDO::ATTR_EMULATE_PREPARES => TRUE,
       // Convert numeric values to strings when fetching.
       \PDO::ATTR_STRINGIFY_FETCHES => TRUE,
-    );
+    ];
 
     try {
       $pdo = new \PDO($dsn, $connection_options['username'], $connection_options['password'], $connection_options['pdo']);
@@ -157,7 +157,7 @@ public static function open(array &$connection_options = array()) {
   /**
    * {@inheritdoc}
    */
-  public function query($query, array $args = array(), $options = array()) {
+  public function query($query, array $args = [], $options = []) {
     $options += $this->defaultOptions();
 
     // The PDO PostgreSQL driver has a bug which doesn't type cast booleans
@@ -211,11 +211,11 @@ public function prepareQuery($query) {
     return parent::prepareQuery(preg_replace('/ ([^ ]+) +(I*LIKE|NOT +I*LIKE|~\*) /i', ' ${1}::text ${2} ', $query));
   }
 
-  public function queryRange($query, $from, $count, array $args = array(), array $options = array()) {
+  public function queryRange($query, $from, $count, array $args = [], array $options = []) {
     return $this->query($query . ' LIMIT ' . (int) $count . ' OFFSET ' . (int) $from, $args, $options);
   }
 
-  public function queryTemporary($query, array $args = array(), array $options = array()) {
+  public function queryTemporary($query, array $args = [], array $options = []) {
     $tablename = $this->generateTemporaryTableName();
     $this->query('CREATE TEMPORARY TABLE {' . $tablename . '} AS ' . $query, $args, $options);
     return $tablename;
@@ -441,7 +441,7 @@ public function rollbackSavepoint($savepoint_name = 'mimic_implicit_commit') {
   /**
    * {@inheritdoc}
    */
-  public function upsert($table, array $options = array()) {
+  public function upsert($table, array $options = []) {
     // Use the (faster) native Upsert implementation for PostgreSQL >= 9.5.
     if (version_compare($this->version(), '9.5', '>=')) {
       $class = $this->getDriverClass('NativeUpsert');
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/Insert.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Insert.php
index 6b9be78ee62fdaaebf02d0c5019a7a662e8822a3..45c7a47ea66417b69a2bbea32f2e1b4f94866b3e 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/Insert.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Insert.php
@@ -26,7 +26,7 @@ public function execute() {
     $table_information = $this->connection->schema()->queryTableInformation($this->table);
 
     $max_placeholder = 0;
-    $blobs = array();
+    $blobs = [];
     $blob_count = 0;
     foreach ($this->insertValues as $insert_values) {
       foreach ($this->insertFields as $idx => $field) {
@@ -66,7 +66,7 @@ public function execute() {
             // used twice. However, trying to insert a value into a serial
             // column should only be done in very rare cases and is not thread
             // safe by definition.
-            $this->connection->query("SELECT setval('" . $table_information->sequences[$index] . "', GREATEST(MAX(" . $serial_field . "), :serial_value)) FROM {" . $this->table . "}", array(':serial_value' => (int)$serial_value));
+            $this->connection->query("SELECT setval('" . $table_information->sequences[$index] . "', GREATEST(MAX(" . $serial_field . "), :serial_value)) FROM {" . $this->table . "}", [':serial_value' => (int)$serial_value]);
           }
         }
       }
@@ -103,10 +103,10 @@ public function execute() {
     try {
       // Only use the returned last_insert_id if it is not already set.
       if (!empty($last_insert_id)) {
-        $this->connection->query($stmt, array(), $options);
+        $this->connection->query($stmt, [], $options);
       }
       else {
-        $last_insert_id = $this->connection->query($stmt, array(), $options);
+        $last_insert_id = $this->connection->query($stmt, [], $options);
       }
       $this->connection->releaseSavepoint();
     }
@@ -116,7 +116,7 @@ public function execute() {
     }
 
     // Re-initialize the values array so that we can re-use this query.
-    $this->insertValues = array();
+    $this->insertValues = [];
 
     return $last_insert_id;
   }
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php
index 77e0a47538e204393bb949b72ed233954f0ab971..33579de8e13c10e87569689e401176e4885be40d 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php
@@ -20,22 +20,22 @@ class Tasks extends InstallTasks {
    * Constructs a \Drupal\Core\Database\Driver\pgsql\Install\Tasks object.
    */
   public function __construct() {
-    $this->tasks[] = array(
+    $this->tasks[] = [
       'function' => 'checkEncoding',
-      'arguments' => array(),
-    );
-    $this->tasks[] = array(
+      'arguments' => [],
+    ];
+    $this->tasks[] = [
       'function' => 'checkBinaryOutput',
-      'arguments' => array(),
-    );
-    $this->tasks[] = array(
+      'arguments' => [],
+    ];
+    $this->tasks[] = [
       'function' => 'checkStandardConformingStrings',
-      'arguments' => array(),
-    );
-    $this->tasks[] = array(
+      'arguments' => [],
+    ];
+    $this->tasks[] = [
       'function' => 'initializeDatabase',
-      'arguments' => array(),
-    );
+      'arguments' => [],
+    ];
   }
 
   /**
@@ -94,13 +94,13 @@ protected function connect() {
         catch (DatabaseNotFoundException $e) {
           // Still no dice; probably a permission issue. Raise the error to the
           // installer.
-          $this->fail(t('Database %database not found. The server reports the following message when attempting to create the database: %error.', array('%database' => $database, '%error' => $e->getMessage())));
+          $this->fail(t('Database %database not found. The server reports the following message when attempting to create the database: %error.', ['%database' => $database, '%error' => $e->getMessage()]));
         }
       }
       else {
         // Database connection failed for some other reason than the database
         // not existing.
-        $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', array('%error' => $e->getMessage())));
+        $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', ['%error' => $e->getMessage()]));
         return FALSE;
       }
     }
@@ -116,10 +116,10 @@ protected function checkEncoding() {
         $this->pass(t('Database is encoded in UTF-8'));
       }
       else {
-        $this->fail(t('The %driver database must use %encoding encoding to work with Drupal. Recreate the database with %encoding encoding. See <a href="INSTALL.pgsql.txt">INSTALL.pgsql.txt</a> for more details.', array(
+        $this->fail(t('The %driver database must use %encoding encoding to work with Drupal. Recreate the database with %encoding encoding. See <a href="INSTALL.pgsql.txt">INSTALL.pgsql.txt</a> for more details.', [
           '%encoding' => 'UTF8',
           '%driver' => $this->name(),
-        )));
+        ]));
       }
     }
     catch (\Exception $e) {
@@ -161,12 +161,12 @@ function checkBinaryOutput() {
         // Recheck, if it fails, finally just rely on the end user to do the
         // right thing.
         if (!$this->checkBinaryOutputSuccess()) {
-          $replacements = array(
+          $replacements = [
             '%setting' => 'bytea_output',
             '%current_value' => 'hex',
             '%needed_value' => 'escape',
             '@query' => $query,
-          );
+          ];
           $this->fail(t("The %setting setting is currently set to '%current_value', but needs to be '%needed_value'. Change this by running the following query: <code>@query</code>", $replacements));
         }
       }
@@ -214,12 +214,12 @@ public function checkStandardConformingStrings() {
       // Recheck, if it fails, finally just rely on the end user to do the
       // right thing.
       if (!$this->checkStandardConformingStringsSuccess()) {
-        $replacements = array(
+        $replacements = [
           '%setting' => 'standard_conforming_strings',
           '%current_value' => 'off',
           '%needed_value' => 'on',
           '@query' => $query,
-        );
+        ];
         $this->fail(t("The %setting setting is currently set to '%current_value', but needs to be '%needed_value'. Change this by running the following query: <code>@query</code>", $replacements));
       }
     }
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/NativeUpsert.php b/core/lib/Drupal/Core/Database/Driver/pgsql/NativeUpsert.php
index 23c026429a7184fc7b9df1181a9f02fa844f4825..8cb2ce776073b7abbccdcdf028656bf664404b38 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/NativeUpsert.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/NativeUpsert.php
@@ -60,7 +60,7 @@ public function execute() {
             // used twice. However, trying to insert a value into a serial
             // column should only be done in very rare cases and is not thread
             // safe by definition.
-            $this->connection->query("SELECT setval('" . $table_information->sequences[$index] . "', GREATEST(MAX(" . $serial_field . "), :serial_value)) FROM {" . $this->table . "}", array(':serial_value' => (int)$serial_value));
+            $this->connection->query("SELECT setval('" . $table_information->sequences[$index] . "', GREATEST(MAX(" . $serial_field . "), :serial_value)) FROM {" . $this->table . "}", [':serial_value' => (int)$serial_value]);
           }
         }
       }
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
index 4a5f4044a25d7ea8f1173cf2de322724c952c59c..19efe50c0b2dddd8a051513ffc405057fafa1c2d 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
@@ -26,7 +26,7 @@ class Schema extends DatabaseSchema {
    * @see \Drupal\Core\Database\Driver\pgsql\Schema::queryTableInformation()
    * @var array
    */
-  protected $tableInformation = array();
+  protected $tableInformation = [];
 
   /**
    * The maximum allowed length for index, primary key and constraint names.
@@ -108,10 +108,10 @@ public function queryTableInformation($table) {
     }
 
     if (!isset($this->tableInformation[$key])) {
-      $table_information = (object) array(
-        'blob_fields' => array(),
-        'sequences' => array(),
-      );
+      $table_information = (object) [
+        'blob_fields' => [],
+        'sequences' => [],
+      ];
       $this->connection->addSavepoint();
 
       try {
@@ -215,11 +215,11 @@ public function queryFieldInformation($table, $field) {
     $this->connection->addSavepoint();
 
     try {
-      $checks = $this->connection->query("SELECT conname FROM pg_class cl INNER JOIN pg_constraint co ON co.conrelid = cl.oid INNER JOIN pg_attribute attr ON attr.attrelid = cl.oid AND attr.attnum = ANY (co.conkey) INNER JOIN pg_namespace ns ON cl.relnamespace = ns.oid WHERE co.contype = 'c' AND ns.nspname = :schema AND cl.relname = :table AND attr.attname = :column", array(
+      $checks = $this->connection->query("SELECT conname FROM pg_class cl INNER JOIN pg_constraint co ON co.conrelid = cl.oid INNER JOIN pg_attribute attr ON attr.attrelid = cl.oid AND attr.attnum = ANY (co.conkey) INNER JOIN pg_namespace ns ON cl.relnamespace = ns.oid WHERE co.contype = 'c' AND ns.nspname = :schema AND cl.relname = :table AND attr.attname = :column", [
         ':schema' => $schema,
         ':table' => $table_name,
         ':column' => $field,
-      ));
+      ]);
     }
     catch (\Exception $e) {
       $this->connection->rollbackSavepoint();
@@ -244,12 +244,12 @@ public function queryFieldInformation($table, $field) {
    *   An array of SQL statements to create the table.
    */
   protected function createTableSql($name, $table) {
-    $sql_fields = array();
+    $sql_fields = [];
     foreach ($table['fields'] as $field_name => $field) {
       $sql_fields[] = $this->createFieldSql($field_name, $this->processField($field));
     }
 
-    $sql_keys = array();
+    $sql_keys = [];
     if (isset($table['primary key']) && is_array($table['primary key'])) {
       $sql_keys[] = 'CONSTRAINT ' . $this->ensureIdentifiersLength($name, '', 'pkey') . ' PRIMARY KEY (' . $this->createPrimaryKeySql($table['primary key']) . ')';
     }
@@ -309,7 +309,7 @@ protected function createFieldSql($name, $spec) {
       unset($spec['not null']);
     }
 
-    if (in_array($spec['pgsql_type'], array('varchar', 'character')) && isset($spec['length'])) {
+    if (in_array($spec['pgsql_type'], ['varchar', 'character']) && isset($spec['length'])) {
       $sql .= '(' . $spec['length'] . ')';
     }
     elseif (isset($spec['precision']) && isset($spec['scale'])) {
@@ -391,7 +391,7 @@ function getFieldTypeMap() {
     // it much easier for modules (such as schema.module) to map
     // database types back into schema types.
     // $map does not use drupal_static as its value never changes.
-    static $map = array(
+    static $map = [
       'varchar_ascii:normal' => 'varchar',
 
       'varchar:normal' => 'varchar',
@@ -425,12 +425,12 @@ function getFieldTypeMap() {
       'serial:medium' => 'serial',
       'serial:big' => 'bigserial',
       'serial:normal' => 'serial',
-      );
+      ];
     return $map;
   }
 
   protected function _createKeySql($fields) {
-    $return = array();
+    $return = [];
     foreach ($fields as $field) {
       if (is_array($field)) {
         $return[] = 'substr(' . $field[0] . ', 1, ' . $field[1] . ')';
@@ -450,7 +450,7 @@ protected function _createKeySql($fields) {
    * key length defined in the schema is ignored.
    */
   protected function createPrimaryKeySql($fields) {
-    $return = array();
+    $return = [];
     foreach ($fields as $field) {
       if (is_array($field)) {
         $return[] = '"' . $field[0] . '"';
@@ -468,24 +468,24 @@ protected function createPrimaryKeySql($fields) {
   public function tableExists($table) {
     $prefixInfo = $this->getPrefixInfo($table, TRUE);
 
-    return (bool) $this->connection->query("SELECT 1 FROM pg_tables WHERE schemaname = :schema AND tablename = :table", array(':schema' => $prefixInfo['schema'], ':table' => $prefixInfo['table']))->fetchField();
+    return (bool) $this->connection->query("SELECT 1 FROM pg_tables WHERE schemaname = :schema AND tablename = :table", [':schema' => $prefixInfo['schema'], ':table' => $prefixInfo['table']])->fetchField();
   }
 
   function renameTable($table, $new_name) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", array('@table' => $table, '@table_new' => $new_name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", ['@table' => $table, '@table_new' => $new_name]));
     }
     if ($this->tableExists($new_name)) {
-      throw new SchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", array('@table' => $table, '@table_new' => $new_name)));
+      throw new SchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", ['@table' => $table, '@table_new' => $new_name]));
     }
 
     // Get the schema and tablename for the old table.
     $old_full_name = $this->connection->prefixTables('{' . $table . '}');
-    list($old_schema, $old_table_name) = strpos($old_full_name, '.') ? explode('.', $old_full_name) : array('public', $old_full_name);
+    list($old_schema, $old_table_name) = strpos($old_full_name, '.') ? explode('.', $old_full_name) : ['public', $old_full_name];
 
     // Index names and constraint names are global in PostgreSQL, so we need to
     // rename them when renaming the table.
-    $indexes = $this->connection->query('SELECT indexname FROM pg_indexes WHERE schemaname = :schema AND tablename = :table', array(':schema' => $old_schema, ':table' => $old_table_name));
+    $indexes = $this->connection->query('SELECT indexname FROM pg_indexes WHERE schemaname = :schema AND tablename = :table', [':schema' => $old_schema, ':table' => $old_table_name]);
 
     foreach ($indexes as $index) {
       // Get the index type by suffix, e.g. idx/key/pkey
@@ -535,12 +535,12 @@ public function dropTable($table) {
     return TRUE;
   }
 
-  public function addField($table, $field, $spec, $new_keys = array()) {
+  public function addField($table, $field, $spec, $new_keys = []) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", array('@field' => $field, '@table' => $table)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", ['@field' => $field, '@table' => $table]));
     }
     if ($this->fieldExists($table, $field)) {
-      throw new SchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", array('@field' => $field, '@table' => $table)));
+      throw new SchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", ['@field' => $field, '@table' => $table]));
     }
 
     $fixnull = FALSE;
@@ -553,7 +553,7 @@ public function addField($table, $field, $spec, $new_keys = array()) {
     $this->connection->query($query);
     if (isset($spec['initial'])) {
       $this->connection->update($table)
-        ->fields(array($field => $spec['initial']))
+        ->fields([$field => $spec['initial']])
         ->execute();
     }
     if (isset($spec['initial_from_field'])) {
@@ -586,7 +586,7 @@ public function dropField($table, $field) {
 
   public function fieldSetDefault($table, $field, $default) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", ['@table' => $table, '@field' => $field]));
     }
 
     $default = $this->escapeDefaultValue($default);
@@ -596,7 +596,7 @@ public function fieldSetDefault($table, $field, $default) {
 
   public function fieldSetNoDefault($table, $field) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot remove default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot remove default value of field @table.@field: field doesn't exist.", ['@table' => $table, '@field' => $field]));
     }
 
     $this->connection->query('ALTER TABLE {' . $table . '} ALTER COLUMN "' . $field . '" DROP DEFAULT');
@@ -644,10 +644,10 @@ public function constraintExists($table, $name) {
 
   public function addPrimaryKey($table, $fields) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", array('@table' => $table)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", ['@table' => $table]));
     }
     if ($this->constraintExists($table, 'pkey')) {
-      throw new SchemaObjectExistsException(t("Cannot add primary key to table @table: primary key already exists.", array('@table' => $table)));
+      throw new SchemaObjectExistsException(t("Cannot add primary key to table @table: primary key already exists.", ['@table' => $table]));
     }
 
     $this->connection->query('ALTER TABLE {' . $table . '} ADD CONSTRAINT ' . $this->ensureIdentifiersLength($table, '', 'pkey') . ' PRIMARY KEY (' . $this->createPrimaryKeySql($fields) . ')');
@@ -666,10 +666,10 @@ public function dropPrimaryKey($table) {
 
   function addUniqueKey($table, $name, $fields) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", ['@table' => $table, '@name' => $name]));
     }
     if ($this->constraintExists($table, $name . '__key')) {
-      throw new SchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", ['@table' => $table, '@name' => $name]));
     }
 
     $this->connection->query('ALTER TABLE {' . $table . '} ADD CONSTRAINT ' . $this->ensureIdentifiersLength($table, $name, 'key') . ' UNIQUE (' . implode(',', $fields) . ')');
@@ -691,10 +691,10 @@ public function dropUniqueKey($table, $name) {
    */
   public function addIndex($table, $name, $fields, array $spec) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", ['@table' => $table, '@name' => $name]));
     }
     if ($this->indexExists($table, $name)) {
-      throw new SchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", ['@table' => $table, '@name' => $name]));
     }
 
     $this->connection->query($this->_createIndexSql($table, $name, $fields));
@@ -711,12 +711,12 @@ public function dropIndex($table, $name) {
     return TRUE;
   }
 
-  public function changeField($table, $field, $field_new, $spec, $new_keys = array()) {
+  public function changeField($table, $field, $field_new, $spec, $new_keys = []) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot change the definition of field @table.@name: field doesn't exist.", array('@table' => $table, '@name' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot change the definition of field @table.@name: field doesn't exist.", ['@table' => $table, '@name' => $field]));
     }
     if (($field != $field_new) && $this->fieldExists($table, $field_new)) {
-      throw new SchemaObjectExistsException(t("Cannot rename field @table.@name to @name_new: target field already exists.", array('@table' => $table, '@name' => $field, '@name_new' => $field_new)));
+      throw new SchemaObjectExistsException(t("Cannot rename field @table.@name to @name_new: target field already exists.", ['@table' => $table, '@name' => $field, '@name_new' => $field_new]));
     }
 
     $spec = $this->processField($spec);
@@ -724,14 +724,14 @@ public function changeField($table, $field, $field_new, $spec, $new_keys = array
     // Type 'serial' is known to PostgreSQL, but only during table creation,
     // not when altering. Because of that, we create it here as an 'int'. After
     // we create it we manually re-apply the sequence.
-    if (in_array($spec['pgsql_type'], array('serial', 'bigserial'))) {
+    if (in_array($spec['pgsql_type'], ['serial', 'bigserial'])) {
       $field_def = 'int';
     }
     else {
       $field_def = $spec['pgsql_type'];
     }
 
-    if (in_array($spec['pgsql_type'], array('varchar', 'character', 'text')) && isset($spec['length'])) {
+    if (in_array($spec['pgsql_type'], ['varchar', 'character', 'text']) && isset($spec['length'])) {
       $field_def .= '(' . $spec['length'] . ')';
     }
     elseif (isset($spec['precision']) && isset($spec['scale'])) {
@@ -782,7 +782,7 @@ public function changeField($table, $field, $field_new, $spec, $new_keys = array
       $this->connection->query('ALTER TABLE {' . $table . '} ALTER "' . $field . '" ' . $nullaction);
     }
 
-    if (in_array($spec['pgsql_type'], array('serial', 'bigserial'))) {
+    if (in_array($spec['pgsql_type'], ['serial', 'bigserial'])) {
       // Type "serial" is known to PostgreSQL, but *only* during table creation,
       // not when altering. Because of that, the sequence needs to be created
       // and initialized by hand.
@@ -852,10 +852,10 @@ public function getComment($table, $column = NULL) {
     $info = $this->getPrefixInfo($table);
     // Don't use {} around pg_class, pg_attribute tables.
     if (isset($column)) {
-      return $this->connection->query('SELECT col_description(oid, attnum) FROM pg_class, pg_attribute WHERE attrelid = oid AND relname = ? AND attname = ?', array($info['table'], $column))->fetchField();
+      return $this->connection->query('SELECT col_description(oid, attnum) FROM pg_class, pg_attribute WHERE attrelid = oid AND relname = ? AND attname = ?', [$info['table'], $column])->fetchField();
     }
     else {
-      return $this->connection->query('SELECT obj_description(oid, ?) FROM pg_class WHERE relname = ?', array('pg_class', $info['table']))->fetchField();
+      return $this->connection->query('SELECT obj_description(oid, ?) FROM pg_class WHERE relname = ?', ['pg_class', $info['table']])->fetchField();
     }
   }
 
@@ -872,7 +872,7 @@ public function getComment($table, $column = NULL) {
   protected function hashBase64($data) {
     $hash = base64_encode(hash('sha256', $data, TRUE));
     // Modify the hash so it's safe to use in PostgreSQL identifiers.
-    return strtr($hash, array('+' => '_', '/' => '_', '=' => ''));
+    return strtr($hash, ['+' => '_', '/' => '_', '=' => '']);
   }
 
 }
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/Select.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Select.php
index 3214b332c3b115b2f1a394c9b490bbcbf257ae17..e76cb0f9522e15188bb96a545e744b5dfe2102a6 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/Select.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Select.php
@@ -114,7 +114,7 @@ public function orderBy($field, $direction = 'ASC') {
   /**
    * {@inheritdoc}
    */
-  public function addExpression($expression, $alias = NULL, $arguments = array()) {
+  public function addExpression($expression, $alias = NULL, $arguments = []) {
     if (empty($alias)) {
       $alias = 'expression';
     }
@@ -127,11 +127,11 @@ public function addExpression($expression, $alias = NULL, $arguments = array())
     }
     $alias = $alias_candidate;
 
-    $this->expressions[$alias] = array(
+    $this->expressions[$alias] = [
       'expression' => $expression,
       'alias' => $this->connection->escapeAlias($alias_candidate),
       'arguments' => $arguments,
-    );
+    ];
 
     return $alias;
   }
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/Update.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Update.php
index f6319523aa5e28dfecab47eea5c14ff1c5ce01d9..e937f6c8eacef841b528d39b11ca9d84e86dc671 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/Update.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Update.php
@@ -13,7 +13,7 @@ class Update extends QueryUpdate {
 
   public function execute() {
     $max_placeholder = 0;
-    $blobs = array();
+    $blobs = [];
     $blob_count = 0;
 
     // Because we filter $fields the same way here and in __toString(), the
@@ -75,7 +75,7 @@ public function execute() {
 
     $this->connection->addSavepoint();
     try {
-      $result = $this->connection->query($stmt, array(), $options);
+      $result = $this->connection->query($stmt, [], $options);
       $this->connection->releaseSavepoint();
       return $result;
     }
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/Upsert.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Upsert.php
index 267a8c9ca95ff0bbcf6eec113dbaac702c544355..52e077a179c658b14b9f1d0789aa58a7d8edb9de 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/Upsert.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Upsert.php
@@ -18,9 +18,9 @@ public function execute() {
     }
 
     // Default options for upsert queries.
-    $this->queryOptions += array(
+    $this->queryOptions += [
       'throw_exception' => TRUE,
-    );
+    ];
 
     // Default fields are always placed first for consistency.
     $insert_fields = array_merge($this->defaultFields, $this->insertFields);
@@ -66,7 +66,7 @@ public function execute() {
     }
 
     // Re-initialize the values array so that we can re-use this query.
-    $this->insertValues = array();
+    $this->insertValues = [];
 
     // Transaction commits here where $transaction looses scope.
 
diff --git a/core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php b/core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php
index e71b74dbe9bef975e5593cbbd68e75370dc014ed..a14a83f07787b75847ed17d6b14121339a712526 100644
--- a/core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php
+++ b/core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php
@@ -41,7 +41,7 @@ class Connection extends DatabaseConnection {
    *
    * @var array
    */
-  protected $attachedDatabases = array();
+  protected $attachedDatabases = [];
 
   /**
    * Whether or not a table has been dropped this request: the destructor will
@@ -82,10 +82,10 @@ public function __construct(\PDO $connection, array $connection_options) {
             // In memory database use ':memory:' as database name. According to
             // http://www.sqlite.org/inmemorydb.html it will open a unique
             // database so attaching it twice is not a problem.
-            $this->query('ATTACH DATABASE :database AS :prefix', array(':database' => $connection_options['database'], ':prefix' => $prefix));
+            $this->query('ATTACH DATABASE :database AS :prefix', [':database' => $connection_options['database'], ':prefix' => $prefix]);
           }
           else {
-            $this->query('ATTACH DATABASE :database AS :prefix', array(':database' => $connection_options['database'] . '-' . $prefix, ':prefix' => $prefix));
+            $this->query('ATTACH DATABASE :database AS :prefix', [':database' => $connection_options['database'] . '-' . $prefix, ':prefix' => $prefix]);
           }
         }
 
@@ -101,16 +101,16 @@ public function __construct(\PDO $connection, array $connection_options) {
   /**
    * {@inheritdoc}
    */
-  public static function open(array &$connection_options = array()) {
+  public static function open(array &$connection_options = []) {
     // Allow PDO options to be overridden.
-    $connection_options += array(
-      'pdo' => array(),
-    );
-    $connection_options['pdo'] += array(
+    $connection_options += [
+      'pdo' => [],
+    ];
+    $connection_options['pdo'] += [
       \PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
       // Convert numeric values to strings when fetching.
       \PDO::ATTR_STRINGIFY_FETCHES => TRUE,
-    );
+    ];
 
     try {
       $pdo = new \PDO('sqlite:' . $connection_options['database'], '', '', $connection_options['pdo']);
@@ -126,37 +126,37 @@ public static function open(array &$connection_options = array()) {
 
 
     // Create functions needed by SQLite.
-    $pdo->sqliteCreateFunction('if', array(__CLASS__, 'sqlFunctionIf'));
-    $pdo->sqliteCreateFunction('greatest', array(__CLASS__, 'sqlFunctionGreatest'));
+    $pdo->sqliteCreateFunction('if', [__CLASS__, 'sqlFunctionIf']);
+    $pdo->sqliteCreateFunction('greatest', [__CLASS__, 'sqlFunctionGreatest']);
     $pdo->sqliteCreateFunction('pow', 'pow', 2);
     $pdo->sqliteCreateFunction('exp', 'exp', 1);
     $pdo->sqliteCreateFunction('length', 'strlen', 1);
     $pdo->sqliteCreateFunction('md5', 'md5', 1);
-    $pdo->sqliteCreateFunction('concat', array(__CLASS__, 'sqlFunctionConcat'));
-    $pdo->sqliteCreateFunction('concat_ws', array(__CLASS__, 'sqlFunctionConcatWs'));
-    $pdo->sqliteCreateFunction('substring', array(__CLASS__, 'sqlFunctionSubstring'), 3);
-    $pdo->sqliteCreateFunction('substring_index', array(__CLASS__, 'sqlFunctionSubstringIndex'), 3);
-    $pdo->sqliteCreateFunction('rand', array(__CLASS__, 'sqlFunctionRand'));
-    $pdo->sqliteCreateFunction('regexp', array(__CLASS__, 'sqlFunctionRegexp'));
+    $pdo->sqliteCreateFunction('concat', [__CLASS__, 'sqlFunctionConcat']);
+    $pdo->sqliteCreateFunction('concat_ws', [__CLASS__, 'sqlFunctionConcatWs']);
+    $pdo->sqliteCreateFunction('substring', [__CLASS__, 'sqlFunctionSubstring'], 3);
+    $pdo->sqliteCreateFunction('substring_index', [__CLASS__, 'sqlFunctionSubstringIndex'], 3);
+    $pdo->sqliteCreateFunction('rand', [__CLASS__, 'sqlFunctionRand']);
+    $pdo->sqliteCreateFunction('regexp', [__CLASS__, 'sqlFunctionRegexp']);
 
     // SQLite does not support the LIKE BINARY operator, so we overload the
     // non-standard GLOB operator for case-sensitive matching. Another option
     // would have been to override another non-standard operator, MATCH, but
     // that does not support the NOT keyword prefix.
-    $pdo->sqliteCreateFunction('glob', array(__CLASS__, 'sqlFunctionLikeBinary'));
+    $pdo->sqliteCreateFunction('glob', [__CLASS__, 'sqlFunctionLikeBinary']);
 
     // Create a user-space case-insensitive collation with UTF-8 support.
-    $pdo->sqliteCreateCollation('NOCASE_UTF8', array('Drupal\Component\Utility\Unicode', 'strcasecmp'));
+    $pdo->sqliteCreateCollation('NOCASE_UTF8', ['Drupal\Component\Utility\Unicode', 'strcasecmp']);
 
     // Set SQLite init_commands if not already defined. Enable the Write-Ahead
     // Logging (WAL) for SQLite. See https://www.drupal.org/node/2348137 and
     // https://www.sqlite.org/wal.html.
-    $connection_options += array(
-      'init_commands' => array(),
-    );
-    $connection_options['init_commands'] += array(
+    $connection_options += [
+      'init_commands' => [],
+    ];
+    $connection_options['init_commands'] += [
       'wal' => "PRAGMA journal_mode=WAL",
-    );
+    ];
 
     // Execute sqlite init_commands.
     if (isset($connection_options['init_commands'])) {
@@ -179,7 +179,7 @@ public function __destruct() {
       foreach ($this->attachedDatabases as $prefix) {
         // Check if the database is now empty, ignore the internal SQLite tables.
         try {
-          $count = $this->query('SELECT COUNT(*) FROM ' . $prefix . '.sqlite_master WHERE type = :type AND name NOT LIKE :pattern', array(':type' => 'table', ':pattern' => 'sqlite_%'))->fetchField();
+          $count = $this->query('SELECT COUNT(*) FROM ' . $prefix . '.sqlite_master WHERE type = :type AND name NOT LIKE :pattern', [':type' => 'table', ':pattern' => 'sqlite_%'])->fetchField();
 
           // We can prune the database file if it doesn't have any tables.
           if ($count == 0) {
@@ -325,21 +325,21 @@ public static function sqlFunctionLikeBinary($pattern, $subject) {
     // Replace the SQL LIKE wildcard meta-characters with the equivalent regular
     // expression meta-characters and escape the delimiter that will be used for
     // matching.
-    $pattern = str_replace(array('%', '_'), array('.*?', '.'), preg_quote($pattern, '/'));
+    $pattern = str_replace(['%', '_'], ['.*?', '.'], preg_quote($pattern, '/'));
     return preg_match('/^' . $pattern . '$/', $subject);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function prepare($statement, array $driver_options = array()) {
+  public function prepare($statement, array $driver_options = []) {
     return new Statement($this->connection, $this, $statement, $driver_options);
   }
 
   /**
    * {@inheritdoc}
    */
-  protected function handleQueryException(\PDOException $e, $query, array $args = array(), $options = array()) {
+  protected function handleQueryException(\PDOException $e, $query, array $args = [], $options = []) {
     // The database schema might be changed by another process in between the
     // time that the statement was prepared and the time the statement was run
     // (e.g. usually happens when running tests). In this case, we need to
@@ -353,11 +353,11 @@ protected function handleQueryException(\PDOException $e, $query, array $args =
     parent::handleQueryException($e, $query, $args, $options);
   }
 
-  public function queryRange($query, $from, $count, array $args = array(), array $options = array()) {
+  public function queryRange($query, $from, $count, array $args = [], array $options = []) {
     return $this->query($query . ' LIMIT ' . (int) $from . ', ' . (int) $count, $args, $options);
   }
 
-  public function queryTemporary($query, array $args = array(), array $options = array()) {
+  public function queryTemporary($query, array $args = [], array $options = []) {
     // Generate a new temporary table name and protect it from prefixing.
     // SQLite requires that temporary tables to be non-qualified.
     $tablename = $this->generateTemporaryTableName();
@@ -414,13 +414,13 @@ public function nextId($existing_id = 0) {
     // wait until this transaction commits. Also, the return value needs to be
     // set to RETURN_AFFECTED as if it were a real update() query otherwise it
     // is not possible to get the row count properly.
-    $affected = $this->query('UPDATE {sequences} SET value = GREATEST(value, :existing_id) + 1', array(
+    $affected = $this->query('UPDATE {sequences} SET value = GREATEST(value, :existing_id) + 1', [
       ':existing_id' => $existing_id,
-    ), array('return' => Database::RETURN_AFFECTED));
+    ], ['return' => Database::RETURN_AFFECTED]);
     if (!$affected) {
-      $this->query('INSERT INTO {sequences} (value) VALUES (:existing_id + 1)', array(
+      $this->query('INSERT INTO {sequences} (value) VALUES (:existing_id + 1)', [
         ':existing_id' => $existing_id,
-      ));
+      ]);
     }
     // The transaction gets committed when the transaction object gets destroyed
     // because it gets out of scope.
diff --git a/core/lib/Drupal/Core/Database/Driver/sqlite/Insert.php b/core/lib/Drupal/Core/Database/Driver/sqlite/Insert.php
index 506e65518ae5704d9fd00b527186670bba421bce..0c4fdb668b91488d45bd57ff64391b35747538be 100644
--- a/core/lib/Drupal/Core/Database/Driver/sqlite/Insert.php
+++ b/core/lib/Drupal/Core/Database/Driver/sqlite/Insert.php
@@ -21,7 +21,7 @@ public function execute() {
       return parent::execute();
     }
     else {
-      return $this->connection->query('INSERT INTO {' . $this->table . '} DEFAULT VALUES', array(), $this->queryOptions);
+      return $this->connection->query('INSERT INTO {' . $this->table . '} DEFAULT VALUES', [], $this->queryOptions);
     }
   }
 
@@ -30,7 +30,7 @@ public function __toString() {
     $comments = $this->connection->makeComment($this->comments);
 
     // Produce as many generic placeholders as necessary.
-    $placeholders = array();
+    $placeholders = [];
     if (!empty($this->insertFields)) {
       $placeholders = array_fill(0, count($this->insertFields), '?');
     }
diff --git a/core/lib/Drupal/Core/Database/Driver/sqlite/Install/Tasks.php b/core/lib/Drupal/Core/Database/Driver/sqlite/Install/Tasks.php
index f56b26ce443ae46449e204dd67e2ddd00b2da79a..b0ea18877aecf8d29c1ed77e22ca6dde68a92660 100644
--- a/core/lib/Drupal/Core/Database/Driver/sqlite/Install/Tasks.php
+++ b/core/lib/Drupal/Core/Database/Driver/sqlite/Install/Tasks.php
@@ -42,7 +42,7 @@ public function getFormOptions(array $database) {
 
     // Make the text more accurate for SQLite.
     $form['database']['#title'] = t('Database file');
-    $form['database']['#description'] = t('The absolute path to the file where @drupal data will be stored. This must be writable by the web server and should exist outside of the web root.', array('@drupal' => drupal_install_profile_distribution_name()));
+    $form['database']['#description'] = t('The absolute path to the file where @drupal data will be stored. This must be writable by the web server and should exist outside of the web root.', ['@drupal' => drupal_install_profile_distribution_name()]);
     $default_database = \Drupal::service('site.path') . '/files/.ht.sqlite';
     $form['database']['#default_value'] = empty($database['database']) ? $default_database : $database['database'];
     return $form;
@@ -91,13 +91,13 @@ protected function connect() {
         catch (DatabaseNotFoundException $e) {
           // Still no dice; probably a permission issue. Raise the error to the
           // installer.
-          $this->fail(t('Database %database not found. The server reports the following message when attempting to create the database: %error.', array('%database' => $database, '%error' => $e->getMessage())));
+          $this->fail(t('Database %database not found. The server reports the following message when attempting to create the database: %error.', ['%database' => $database, '%error' => $e->getMessage()]));
         }
       }
       else {
         // Database connection failed for some other reason than the database
         // not existing.
-        $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', array('%error' => $e->getMessage())));
+        $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', ['%error' => $e->getMessage()]));
         return FALSE;
       }
     }
diff --git a/core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php b/core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php
index 4b954ed35dfe8cc858e1513bdfe929d3378896e5..385b8d30f95da77a3c5d8cea9bbda5ae4a876c6b 100644
--- a/core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php
+++ b/core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php
@@ -26,7 +26,7 @@ public function tableExists($table) {
     $info = $this->getPrefixInfo($table);
 
     // Don't use {} around sqlite_master table.
-    return (bool) $this->connection->query('SELECT 1 FROM ' . $info['schema'] . '.sqlite_master WHERE type = :type AND name = :name', array(':type' => 'table', ':name' => $info['table']))->fetchField();
+    return (bool) $this->connection->query('SELECT 1 FROM ' . $info['schema'] . '.sqlite_master WHERE type = :type AND name = :name', [':type' => 'table', ':name' => $info['table']])->fetchField();
   }
 
   public function fieldExists($table, $column) {
@@ -45,7 +45,7 @@ public function fieldExists($table, $column) {
    *   An array of SQL statements to create the table.
    */
   public function createTableSql($name, $table) {
-    $sql = array();
+    $sql = [];
     $sql[] = "CREATE TABLE {" . $name . "} (\n" . $this->createColumnsSql($name, $table) . "\n)\n";
     return array_merge($sql, $this->createIndexSql($name, $table));
   }
@@ -54,7 +54,7 @@ public function createTableSql($name, $table) {
    * Build the SQL expression for indexes.
    */
   protected function createIndexSql($tablename, $schema) {
-    $sql = array();
+    $sql = [];
     $info = $this->getPrefixInfo($tablename);
     if (!empty($schema['unique keys'])) {
       foreach ($schema['unique keys'] as $key => $fields) {
@@ -73,7 +73,7 @@ protected function createIndexSql($tablename, $schema) {
    * Build the SQL expression for creating columns.
    */
   protected function createColumnsSql($tablename, $schema) {
-    $sql_array = array();
+    $sql_array = [];
 
     // Add the SQL statement for each field.
     foreach ($schema['fields'] as $name => $field) {
@@ -97,7 +97,7 @@ protected function createColumnsSql($tablename, $schema) {
    * Build the SQL expression for keys.
    */
   protected function createKeySql($fields) {
-    $return = array();
+    $return = [];
     foreach ($fields as $field) {
       if (is_array($field)) {
         $return[] = $field[0];
@@ -163,7 +163,7 @@ protected function createFieldSql($name, $spec) {
     else {
       $sql = $name . ' ' . $spec['sqlite_type'];
 
-      if (in_array($spec['sqlite_type'], array('VARCHAR', 'TEXT'))) {
+      if (in_array($spec['sqlite_type'], ['VARCHAR', 'TEXT'])) {
         if (isset($spec['length'])) {
           $sql .= '(' . $spec['length'] . ')';
         }
@@ -209,7 +209,7 @@ public function getFieldTypeMap() {
     // it much easier for modules (such as schema.module) to map
     // database types back into schema types.
     // $map does not use drupal_static as its value never changes.
-    static $map = array(
+    static $map = [
       'varchar_ascii:normal' => 'VARCHAR',
 
       'varchar:normal'  => 'VARCHAR',
@@ -243,16 +243,16 @@ public function getFieldTypeMap() {
 
       'blob:big'        => 'BLOB',
       'blob:normal'     => 'BLOB',
-    );
+    ];
     return $map;
   }
 
   public function renameTable($table, $new_name) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", array('@table' => $table, '@table_new' => $new_name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", ['@table' => $table, '@table_new' => $new_name]));
     }
     if ($this->tableExists($new_name)) {
-      throw new SchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", array('@table' => $table, '@table_new' => $new_name)));
+      throw new SchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", ['@table' => $table, '@table_new' => $new_name]));
     }
 
     $schema = $this->introspectSchema($table);
@@ -293,12 +293,12 @@ public function dropTable($table) {
     return TRUE;
   }
 
-  public function addField($table, $field, $specification, $keys_new = array()) {
+  public function addField($table, $field, $specification, $keys_new = []) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", array('@field' => $field, '@table' => $table)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", ['@field' => $field, '@table' => $table]));
     }
     if ($this->fieldExists($table, $field)) {
-      throw new SchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", array('@field' => $field, '@table' => $table)));
+      throw new SchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", ['@field' => $field, '@table' => $table]));
     }
 
     // SQLite doesn't have a full-featured ALTER TABLE statement. It only
@@ -313,7 +313,7 @@ public function addField($table, $field, $specification, $keys_new = array()) {
       // Apply the initial value if set.
       if (isset($specification['initial'])) {
         $this->connection->update($table)
-          ->fields(array($field => $specification['initial']))
+          ->fields([$field => $specification['initial']])
           ->execute();
       }
       if (isset($specification['initial_from_field'])) {
@@ -332,20 +332,20 @@ public function addField($table, $field, $specification, $keys_new = array()) {
       $new_schema['fields'][$field] = $specification;
 
       // Build the mapping between the old fields and the new fields.
-      $mapping = array();
+      $mapping = [];
       if (isset($specification['initial'])) {
         // If we have a initial value, copy it over.
-        $mapping[$field] = array(
+        $mapping[$field] = [
           'expression' => ':newfieldinitial',
-          'arguments' => array(':newfieldinitial' => $specification['initial']),
-        );
+          'arguments' => [':newfieldinitial' => $specification['initial']],
+        ];
       }
       elseif (isset($specification['initial_from_field'])) {
         // If we have a initial value, copy it over.
-        $mapping[$field] = array(
+        $mapping[$field] = [
           'expression' => $specification['initial_from_field'],
           'arguments' => [],
-        );
+        ];
       }
       else {
         // Else use the default of the field.
@@ -380,7 +380,7 @@ public function addField($table, $field, $specification, $keys_new = array()) {
    *     - an associative array with two keys 'expression' and 'arguments',
    *       that will be used as an expression field.
    */
-  protected function alterTable($table, $old_schema, $new_schema, array $mapping = array()) {
+  protected function alterTable($table, $old_schema, $new_schema, array $mapping = []) {
     $i = 0;
     do {
       $new_table = $table . '_' . $i++;
@@ -441,12 +441,12 @@ protected function alterTable($table, $old_schema, $new_schema, array $mapping =
    */
   protected function introspectSchema($table) {
     $mapped_fields = array_flip($this->getFieldTypeMap());
-    $schema = array(
-      'fields' => array(),
-      'primary key' => array(),
-      'unique keys' => array(),
-      'indexes' => array(),
-    );
+    $schema = [
+      'fields' => [],
+      'primary key' => [],
+      'unique keys' => [],
+      'indexes' => [],
+    ];
 
     $info = $this->getPrefixInfo($table);
     $result = $this->connection->query('PRAGMA ' . $info['schema'] . '.table_info(' . $info['table'] . ')');
@@ -461,12 +461,12 @@ protected function introspectSchema($table) {
       }
       if (isset($mapped_fields[$type])) {
         list($type, $size) = explode(':', $mapped_fields[$type]);
-        $schema['fields'][$row->name] = array(
+        $schema['fields'][$row->name] = [
           'type' => $type,
           'size' => $size,
           'not null' => !empty($row->notnull),
           'default' => trim($row->dflt_value, "'"),
-        );
+        ];
         if ($length) {
           $schema['fields'][$row->name]['length'] = $length;
         }
@@ -478,14 +478,14 @@ protected function introspectSchema($table) {
         throw new \Exception("Unable to parse the column type " . $row->type);
       }
     }
-    $indexes = array();
+    $indexes = [];
     $result = $this->connection->query('PRAGMA ' . $info['schema'] . '.index_list(' . $info['table'] . ')');
     foreach ($result as $row) {
       if (strpos($row->name, 'sqlite_autoindex_') !== 0) {
-        $indexes[] = array(
+        $indexes[] = [
           'schema_key' => $row->unique ? 'unique keys' : 'indexes',
           'name' => $row->name,
-        );
+        ];
       }
     }
     foreach ($indexes as $index) {
@@ -531,12 +531,12 @@ public function dropField($table, $field) {
     return TRUE;
   }
 
-  public function changeField($table, $field, $field_new, $spec, $keys_new = array()) {
+  public function changeField($table, $field, $field_new, $spec, $keys_new = []) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot change the definition of field @table.@name: field doesn't exist.", array('@table' => $table, '@name' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot change the definition of field @table.@name: field doesn't exist.", ['@table' => $table, '@name' => $field]));
     }
     if (($field != $field_new) && $this->fieldExists($table, $field_new)) {
-      throw new SchemaObjectExistsException(t("Cannot rename field @table.@name to @name_new: target field already exists.", array('@table' => $table, '@name' => $field, '@name_new' => $field_new)));
+      throw new SchemaObjectExistsException(t("Cannot rename field @table.@name to @name_new: target field already exists.", ['@table' => $table, '@name' => $field, '@name_new' => $field_new]));
     }
 
     $old_schema = $this->introspectSchema($table);
@@ -547,7 +547,7 @@ public function changeField($table, $field, $field_new, $spec, $keys_new = array
       $mapping[$field_new] = $field;
     }
     else {
-      $mapping = array();
+      $mapping = [];
     }
 
     // Remove the previous definition and swap in the new one.
@@ -556,7 +556,7 @@ public function changeField($table, $field, $field_new, $spec, $keys_new = array
 
     // Map the former indexes to the new column name.
     $new_schema['primary key'] = $this->mapKeyDefinition($new_schema['primary key'], $mapping);
-    foreach (array('unique keys', 'indexes') as $k) {
+    foreach (['unique keys', 'indexes'] as $k) {
       foreach ($new_schema[$k] as &$key_definition) {
         $key_definition = $this->mapKeyDefinition($key_definition, $mapping);
       }
@@ -566,7 +566,7 @@ public function changeField($table, $field, $field_new, $spec, $keys_new = array
     if (isset($keys_new['primary key'])) {
       $new_schema['primary key'] = $keys_new['primary key'];
     }
-    foreach (array('unique keys', 'indexes') as $k) {
+    foreach (['unique keys', 'indexes'] as $k) {
       if (!empty($keys_new[$k])) {
         $new_schema[$k] = $keys_new[$k] + $new_schema[$k];
       }
@@ -601,10 +601,10 @@ protected function mapKeyDefinition(array $key_definition, array $mapping) {
    */
   public function addIndex($table, $name, $fields, array $spec) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", ['@table' => $table, '@name' => $name]));
     }
     if ($this->indexExists($table, $name)) {
-      throw new SchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", ['@table' => $table, '@name' => $name]));
     }
 
     $schema['indexes'][$name] = $fields;
@@ -633,10 +633,10 @@ public function dropIndex($table, $name) {
 
   public function addUniqueKey($table, $name, $fields) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", ['@table' => $table, '@name' => $name]));
     }
     if ($this->indexExists($table, $name)) {
-      throw new SchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", array('@table' => $table, '@name' => $name)));
+      throw new SchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", ['@table' => $table, '@name' => $name]));
     }
 
     $schema['unique keys'][$name] = $fields;
@@ -659,14 +659,14 @@ public function dropUniqueKey($table, $name) {
 
   public function addPrimaryKey($table, $fields) {
     if (!$this->tableExists($table)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", array('@table' => $table)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", ['@table' => $table]));
     }
 
     $old_schema = $this->introspectSchema($table);
     $new_schema = $old_schema;
 
     if (!empty($new_schema['primary key'])) {
-      throw new SchemaObjectExistsException(t("Cannot add primary key to table @table: primary key already exists.", array('@table' => $table)));
+      throw new SchemaObjectExistsException(t("Cannot add primary key to table @table: primary key already exists.", ['@table' => $table]));
     }
 
     $new_schema['primary key'] = $fields;
@@ -688,7 +688,7 @@ public function dropPrimaryKey($table) {
 
   public function fieldSetDefault($table, $field, $default) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", ['@table' => $table, '@field' => $field]));
     }
 
     $old_schema = $this->introspectSchema($table);
@@ -700,7 +700,7 @@ public function fieldSetDefault($table, $field, $default) {
 
   public function fieldSetNoDefault($table, $field) {
     if (!$this->fieldExists($table, $field)) {
-      throw new SchemaObjectDoesNotExistException(t("Cannot remove default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
+      throw new SchemaObjectDoesNotExistException(t("Cannot remove default value of field @table.@field: field doesn't exist.", ['@table' => $table, '@field' => $field]));
     }
 
     $old_schema = $this->introspectSchema($table);
@@ -726,11 +726,11 @@ public function findTables($table_expression) {
       // Can't use query placeholders for the schema because the query would
       // have to be :prefixsqlite_master, which does not work. We also need to
       // ignore the internal SQLite tables.
-      $result = $this->connection->query("SELECT name FROM " . $schema . ".sqlite_master WHERE type = :type AND name LIKE :table_name AND name NOT LIKE :pattern", array(
+      $result = $this->connection->query("SELECT name FROM " . $schema . ".sqlite_master WHERE type = :type AND name LIKE :table_name AND name NOT LIKE :pattern", [
         ':type' => 'table',
         ':table_name' => $table_expression,
         ':pattern' => 'sqlite_%',
-      ));
+      ]);
       $tables += $result->fetchAllKeyed(0, 0);
     }
 
diff --git a/core/lib/Drupal/Core/Database/Driver/sqlite/Statement.php b/core/lib/Drupal/Core/Database/Driver/sqlite/Statement.php
index adc537cc345aa68b08ead672bad87f0016bb2d7f..5610d071ce3050c6164e45b04db5eda710858589 100644
--- a/core/lib/Drupal/Core/Database/Driver/sqlite/Statement.php
+++ b/core/lib/Drupal/Core/Database/Driver/sqlite/Statement.php
@@ -26,13 +26,13 @@ class Statement extends StatementPrefetch implements StatementInterface {
    *
    * See http://bugs.php.net/bug.php?id=45259 for more details.
    */
-  protected function getStatement($query, &$args = array()) {
+  protected function getStatement($query, &$args = []) {
     if (count($args)) {
       // Check if $args is a simple numeric array.
       if (range(0, count($args) - 1) === array_keys($args)) {
         // In that case, we have unnamed placeholders.
         $count = 0;
-        $new_args = array();
+        $new_args = [];
         foreach ($args as $value) {
           if (is_float($value) || is_int($value)) {
             if (is_float($value)) {
@@ -85,7 +85,7 @@ protected function getStatement($query, &$args = array()) {
   /**
    * {@inheritdoc}
    */
-  public function execute($args = array(), $options = array()) {
+  public function execute($args = [], $options = []) {
     try {
       $return = parent::execute($args, $options);
     }
@@ -103,7 +103,7 @@ public function execute($args = array(), $options = array()) {
     // In some weird cases, SQLite will prefix some column names by the name
     // of the table. We post-process the data, by renaming the column names
     // using the same convention as MySQL and PostgreSQL.
-    $rename_columns = array();
+    $rename_columns = [];
     foreach ($this->columnNames as $k => $column) {
       // In some SQLite versions, SELECT DISTINCT(field) will return "(field)"
       // instead of "field".
diff --git a/core/lib/Drupal/Core/Database/Install/Tasks.php b/core/lib/Drupal/Core/Database/Install/Tasks.php
index 28196154989b332f93cb1d282a289b5e0d380f77..a2ea41b0d891c7443fdf557aa514fc3dc899ef88 100644
--- a/core/lib/Drupal/Core/Database/Install/Tasks.php
+++ b/core/lib/Drupal/Core/Database/Install/Tasks.php
@@ -26,58 +26,58 @@ abstract class Tasks {
    * Each value of the tasks array is an associative array defining the function
    * to call (optional) and any arguments to be passed to the function.
    */
-  protected $tasks = array(
-    array(
+  protected $tasks = [
+    [
       'function'    => 'checkEngineVersion',
-      'arguments'   => array(),
-    ),
-    array(
-      'arguments'   => array(
+      'arguments'   => [],
+    ],
+    [
+      'arguments'   => [
         'CREATE TABLE {drupal_install_test} (id int NULL)',
         'Drupal can use CREATE TABLE database commands.',
         'Failed to <strong>CREATE</strong> a test table on your database server with the command %query. The server reports the following message: %error.<p>Are you sure the configured username has the necessary permissions to create tables in the database?</p>',
         TRUE,
-      ),
-    ),
-    array(
-      'arguments'   => array(
+      ],
+    ],
+    [
+      'arguments'   => [
         'INSERT INTO {drupal_install_test} (id) VALUES (1)',
         'Drupal can use INSERT database commands.',
         'Failed to <strong>INSERT</strong> a value into a test table on your database server. We tried inserting a value with the command %query and the server reported the following error: %error.',
-      ),
-    ),
-    array(
-      'arguments'   => array(
+      ],
+    ],
+    [
+      'arguments'   => [
         'UPDATE {drupal_install_test} SET id = 2',
         'Drupal can use UPDATE database commands.',
         'Failed to <strong>UPDATE</strong> a value in a test table on your database server. We tried updating a value with the command %query and the server reported the following error: %error.',
-      ),
-    ),
-    array(
-      'arguments'   => array(
+      ],
+    ],
+    [
+      'arguments'   => [
         'DELETE FROM {drupal_install_test}',
         'Drupal can use DELETE database commands.',
         'Failed to <strong>DELETE</strong> a value from a test table on your database server. We tried deleting a value with the command %query and the server reported the following error: %error.',
-      ),
-    ),
-    array(
-      'arguments'   => array(
+      ],
+    ],
+    [
+      'arguments'   => [
         'DROP TABLE {drupal_install_test}',
         'Drupal can use DROP TABLE database commands.',
         'Failed to <strong>DROP</strong> a test table from your database server. We tried dropping a table with the command %query and the server reported the following error %error.',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   /**
    * Results from tasks.
    *
    * @var array
    */
-  protected $results = array(
-    'fail' => array(),
-    'pass' => array(),
-  );
+  protected $results = [
+    'fail' => [],
+    'pass' => [],
+  ];
 
   /**
    * Ensure the PDO driver is supported by the version of PHP in use.
@@ -138,12 +138,12 @@ public function runTasks() {
         }
         if (method_exists($this, $task['function'])) {
           // Returning false is fatal. No other tasks can run.
-          if (FALSE === call_user_func_array(array($this, $task['function']), $task['arguments'])) {
+          if (FALSE === call_user_func_array([$this, $task['function']], $task['arguments'])) {
             break;
           }
         }
         else {
-          $this->fail(t("Failed to run all tasks against the database server. The task %task wasn't found.", array('%task' => $task['function'])));
+          $this->fail(t("Failed to run all tasks against the database server. The task %task wasn't found.", ['%task' => $task['function']]));
         }
       }
     }
@@ -162,7 +162,7 @@ protected function connect() {
       $this->pass('Drupal can CONNECT to the database ok.');
     }
     catch (\Exception $e) {
-      $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', array('%error' => $e->getMessage())));
+      $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', ['%error' => $e->getMessage()]));
       return FALSE;
     }
     return TRUE;
@@ -177,7 +177,7 @@ protected function runTestQuery($query, $pass, $fail, $fatal = FALSE) {
       $this->pass(t($pass));
     }
     catch (\Exception $e) {
-      $this->fail(t($fail, array('%query' => $query, '%error' => $e->getMessage(), '%name' => $this->name())));
+      $this->fail(t($fail, ['%query' => $query, '%error' => $e->getMessage(), '%name' => $this->name()]));
       return !$fatal;
     }
   }
@@ -188,7 +188,7 @@ protected function runTestQuery($query, $pass, $fail, $fatal = FALSE) {
   protected function checkEngineVersion() {
     // Ensure that the database server has the right version.
     if ($this->minimumVersion() && version_compare(Database::getConnection()->version(), $this->minimumVersion(), '<')) {
-      $this->fail(t("The database server version %version is less than the minimum required version %minimum_version.", array('%version' => Database::getConnection()->version(), '%minimum_version' => $this->minimumVersion())));
+      $this->fail(t("The database server version %version is less than the minimum required version %minimum_version.", ['%version' => Database::getConnection()->version(), '%minimum_version' => $this->minimumVersion()]));
     }
   }
 
@@ -202,58 +202,58 @@ protected function checkEngineVersion() {
    *   The options form array.
    */
   public function getFormOptions(array $database) {
-    $form['database'] = array(
+    $form['database'] = [
       '#type' => 'textfield',
       '#title' => t('Database name'),
       '#default_value' => empty($database['database']) ? '' : $database['database'],
       '#size' => 45,
       '#required' => TRUE,
-      '#states' => array(
-        'required' => array(
-          ':input[name=driver]' => array('value' => $this->pdoDriver),
-        ),
-      ),
-    );
+      '#states' => [
+        'required' => [
+          ':input[name=driver]' => ['value' => $this->pdoDriver],
+        ],
+      ],
+    ];
 
-    $form['username'] = array(
+    $form['username'] = [
       '#type' => 'textfield',
       '#title' => t('Database username'),
       '#default_value' => empty($database['username']) ? '' : $database['username'],
       '#size' => 45,
       '#required' => TRUE,
-      '#states' => array(
-        'required' => array(
-          ':input[name=driver]' => array('value' => $this->pdoDriver),
-        ),
-      ),
-    );
+      '#states' => [
+        'required' => [
+          ':input[name=driver]' => ['value' => $this->pdoDriver],
+        ],
+      ],
+    ];
 
-    $form['password'] = array(
+    $form['password'] = [
       '#type' => 'password',
       '#title' => t('Database password'),
       '#default_value' => empty($database['password']) ? '' : $database['password'],
       '#required' => FALSE,
       '#size' => 45,
-    );
+    ];
 
-    $form['advanced_options'] = array(
+    $form['advanced_options'] = [
       '#type' => 'details',
       '#title' => t('Advanced options'),
       '#weight' => 10,
-    );
+    ];
 
     $profile = drupal_get_profile();
     $db_prefix = ($profile == 'standard') ? 'drupal_' : $profile . '_';
-    $form['advanced_options']['prefix'] = array(
+    $form['advanced_options']['prefix'] = [
       '#type' => 'textfield',
       '#title' => t('Table name prefix'),
       '#default_value' => empty($database['prefix']) ? '' : $database['prefix'],
       '#size' => 45,
-      '#description' => t('If more than one application will be sharing this database, a unique table name prefix – such as %prefix – will prevent collisions.', array('%prefix' => $db_prefix)),
+      '#description' => t('If more than one application will be sharing this database, a unique table name prefix – such as %prefix – will prevent collisions.', ['%prefix' => $db_prefix]),
       '#weight' => 10,
-    );
+    ];
 
-    $form['advanced_options']['host'] = array(
+    $form['advanced_options']['host'] = [
       '#type' => 'textfield',
       '#title' => t('Host'),
       '#default_value' => empty($database['host']) ? 'localhost' : $database['host'],
@@ -261,15 +261,15 @@ public function getFormOptions(array $database) {
       // Hostnames can be 255 characters long.
       '#maxlength' => 255,
       '#required' => TRUE,
-    );
+    ];
 
-    $form['advanced_options']['port'] = array(
+    $form['advanced_options']['port'] = [
       '#type' => 'number',
       '#title' => t('Port number'),
       '#default_value' => empty($database['port']) ? '' : $database['port'],
       '#min' => 0,
       '#max' => 65535,
-    );
+    ];
 
     return $form;
   }
@@ -287,11 +287,11 @@ public function getFormOptions(array $database) {
    *   An array of driver configuration errors, keyed by form element name.
    */
   public function validateDatabaseSettings($database) {
-    $errors = array();
+    $errors = [];
 
     // Verify the table prefix.
     if (!empty($database['prefix']) && is_string($database['prefix']) && !preg_match('/^[A-Za-z0-9_.]+$/', $database['prefix'])) {
-      $errors[$database['driver'] . '][prefix'] = t('The database table prefix you have entered, %prefix, is invalid. The table prefix can only contain alphanumeric characters, periods, or underscores.', array('%prefix' => $database['prefix']));
+      $errors[$database['driver'] . '][prefix'] = t('The database table prefix you have entered, %prefix, is invalid. The table prefix can only contain alphanumeric characters, periods, or underscores.', ['%prefix' => $database['prefix']]);
     }
 
     return $errors;
diff --git a/core/lib/Drupal/Core/Database/Log.php b/core/lib/Drupal/Core/Database/Log.php
index 76c39db296c460c752edc63860bb4a0a5a47b812..bf142c2cdedcad5ea6839915e68a1fdd4983fdb8 100644
--- a/core/lib/Drupal/Core/Database/Log.php
+++ b/core/lib/Drupal/Core/Database/Log.php
@@ -29,7 +29,7 @@ class Log {
    *
    * @var array
    */
-  protected $queryLog = array();
+  protected $queryLog = [];
 
   /**
    * The connection key for which this object is logging.
@@ -86,7 +86,7 @@ public function get($logging_key) {
    *   The logging key to empty.
    */
   public function clear($logging_key) {
-    $this->queryLog[$logging_key] = array();
+    $this->queryLog[$logging_key] = [];
   }
 
   /**
@@ -111,13 +111,13 @@ public function end($logging_key) {
    */
   public function log(StatementInterface $statement, $args, $time) {
     foreach (array_keys($this->queryLog) as $key) {
-      $this->queryLog[$key][] = array(
+      $this->queryLog[$key][] = [
         'query' => $statement->getQueryString(),
         'args' => $args,
         'target' => $statement->dbh->getTarget(),
         'caller' => $this->findCaller(),
         'time' => $time,
-      );
+      ];
     }
   }
 
@@ -151,15 +151,15 @@ public function findCaller() {
         $stack[$i]['class'] = '';
       }
       if (strpos($stack[$i]['class'], __NAMESPACE__) === FALSE && strpos($stack[$i + 1]['function'], 'db_') === FALSE && !empty($stack[$i]['file'])) {
-        $stack[$i] += array('file' => '?', 'line' => '?', 'args' => array());
-        return array(
+        $stack[$i] += ['file' => '?', 'line' => '?', 'args' => []];
+        return [
           'file' => $stack[$i]['file'],
           'line' => $stack[$i]['line'],
           'function' => $stack[$i + 1]['function'],
           'class' => isset($stack[$i + 1]['class']) ? $stack[$i + 1]['class'] : NULL,
           'type' => isset($stack[$i + 1]['type']) ? $stack[$i + 1]['type'] : NULL,
           'args' => $stack[$i + 1]['args'],
-        );
+        ];
       }
     }
   }
diff --git a/core/lib/Drupal/Core/Database/Query/Condition.php b/core/lib/Drupal/Core/Database/Query/Condition.php
index 52a5700b04e74c1500a555079ce0c7c2cc52f7f5..d04fec58e3c058ccf352298c2697db0d89ed1cb6 100644
--- a/core/lib/Drupal/Core/Database/Query/Condition.php
+++ b/core/lib/Drupal/Core/Database/Query/Condition.php
@@ -13,41 +13,41 @@ class Condition implements ConditionInterface, \Countable {
   /**
    * Provides a map of condition operators to condition operator options.
    */
-  protected static $conditionOperatorMap = array(
-    'BETWEEN' => array('delimiter' => ' AND '),
-    'NOT BETWEEN' => array('delimiter' => ' AND '),
-    'IN' => array('delimiter' => ', ', 'prefix' => '(', 'postfix' => ')'),
-    'NOT IN' => array('delimiter' => ', ', 'prefix' => '(', 'postfix' => ')'),
-    'IS NULL' => array('use_value' => FALSE),
-    'IS NOT NULL' => array('use_value' => FALSE),
+  protected static $conditionOperatorMap = [
+    'BETWEEN' => ['delimiter' => ' AND '],
+    'NOT BETWEEN' => ['delimiter' => ' AND '],
+    'IN' => ['delimiter' => ', ', 'prefix' => '(', 'postfix' => ')'],
+    'NOT IN' => ['delimiter' => ', ', 'prefix' => '(', 'postfix' => ')'],
+    'IS NULL' => ['use_value' => FALSE],
+    'IS NOT NULL' => ['use_value' => FALSE],
     // Use backslash for escaping wildcard characters.
-    'LIKE' => array('postfix' => " ESCAPE '\\\\'"),
-    'NOT LIKE' => array('postfix' => " ESCAPE '\\\\'"),
+    'LIKE' => ['postfix' => " ESCAPE '\\\\'"],
+    'NOT LIKE' => ['postfix' => " ESCAPE '\\\\'"],
     // Exists expects an already bracketed subquery as right hand part. Do
     // not define additional brackets.
-    'EXISTS' => array(),
-    'NOT EXISTS' => array(),
+    'EXISTS' => [],
+    'NOT EXISTS' => [],
     // These ones are here for performance reasons.
-    '=' => array(),
-    '<' => array(),
-    '>' => array(),
-    '>=' => array(),
-    '<=' => array(),
-  );
+    '=' => [],
+    '<' => [],
+    '>' => [],
+    '>=' => [],
+    '<=' => [],
+  ];
 
   /**
    * Array of conditions.
    *
    * @var array
    */
-  protected $conditions = array();
+  protected $conditions = [];
 
   /**
    * Array of arguments.
    *
    * @var array
    */
-  protected $arguments = array();
+  protected $arguments = [];
 
   /**
    * Whether the conditions have been changed.
@@ -103,11 +103,11 @@ public function condition($field, $value = NULL, $operator = '=') {
       throw new InvalidQueryException(sprintf("Query condition '%s %s ()' cannot be empty.", $field, $operator));
     }
 
-    $this->conditions[] = array(
+    $this->conditions[] = [
       'field' => $field,
       'value' => $value,
       'operator' => $operator,
-    );
+    ];
 
     $this->changed = TRUE;
 
@@ -117,12 +117,12 @@ public function condition($field, $value = NULL, $operator = '=') {
   /**
    * {@inheritdoc}
    */
-  public function where($snippet, $args = array()) {
-    $this->conditions[] = array(
+  public function where($snippet, $args = []) {
+    $this->conditions[] = [
       'field' => $snippet,
       'value' => $args,
       'operator' => NULL,
-    );
+    ];
     $this->changed = TRUE;
 
     return $this;
@@ -183,8 +183,8 @@ public function compile(Connection $connection, PlaceholderInterface $queryPlace
     if ($this->changed || isset($this->queryPlaceholderIdentifier) && ($this->queryPlaceholderIdentifier != $queryPlaceholder->uniqueIdentifier())) {
       $this->queryPlaceholderIdentifier = $queryPlaceholder->uniqueIdentifier();
 
-      $condition_fragments = array();
-      $arguments = array();
+      $condition_fragments = [];
+      $arguments = [];
 
       $conditions = $this->conditions;
       $conjunction = $conditions['#conjunction'];
@@ -224,7 +224,7 @@ public function compile(Connection $connection, PlaceholderInterface $queryPlace
 
         // Process operator.
         if ($ignore_operator) {
-          $operator = array('operator' => '', 'use_value' => FALSE);
+          $operator = ['operator' => '', 'use_value' => FALSE];
         }
         else {
           // Remove potentially dangerous characters.
@@ -255,15 +255,15 @@ public function compile(Connection $connection, PlaceholderInterface $queryPlace
           if (!isset($operator)) {
             $operator = $this->mapConditionOperator($condition['operator']);
           }
-          $operator += array('operator' => $condition['operator']);
+          $operator += ['operator' => $condition['operator']];
         }
         // Add defaults.
-        $operator += array(
+        $operator += [
           'prefix' => '',
           'postfix' => '',
           'delimiter' => '',
           'use_value' => TRUE,
-        );
+        ];
         $operator_fragment = $operator['operator'];
 
         // Process value.
@@ -279,10 +279,10 @@ public function compile(Connection $connection, PlaceholderInterface $queryPlace
               $operator['prefix'] = '';
               $operator['postfix'] = '';
             }
-            $condition['value'] = array($condition['value']);
+            $condition['value'] = [$condition['value']];
           }
           // Process all individual values.
-          $value_fragment = array();
+          $value_fragment = [];
           foreach ($condition['value'] as $value) {
             if ($value instanceof SelectInterface) {
               // Right hand part is a subquery. Compile, put brackets around it
@@ -303,7 +303,7 @@ public function compile(Connection $connection, PlaceholderInterface $queryPlace
         }
 
         // Concatenate the left hand part, operator and right hand part.
-        $condition_fragments[] = trim(implode(' ', array($field_fragment, $operator_fragment, $value_fragment)));
+        $condition_fragments[] = trim(implode(' ', [$field_fragment, $operator_fragment, $value_fragment]));
       }
 
       // Concatenate all conditions using the conjunction and brackets around
@@ -377,10 +377,10 @@ protected function mapConditionOperator($operator) {
       // We need to upper case because PHP index matches are case sensitive but
       // do not need the more expensive Unicode::strtoupper() because SQL statements are ASCII.
       $operator = strtoupper($operator);
-      $return = isset(static::$conditionOperatorMap[$operator]) ? static::$conditionOperatorMap[$operator] : array();
+      $return = isset(static::$conditionOperatorMap[$operator]) ? static::$conditionOperatorMap[$operator] : [];
     }
 
-    $return += array('operator' => $operator);
+    $return += ['operator' => $operator];
 
     return $return;
   }
diff --git a/core/lib/Drupal/Core/Database/Query/ConditionInterface.php b/core/lib/Drupal/Core/Database/Query/ConditionInterface.php
index 0c82a10fd3ec6f4ebc3e0486598fae3b6764ddc5..aa5090a89a3f5aa3b1457b37f52f26c3c12751f4 100644
--- a/core/lib/Drupal/Core/Database/Query/ConditionInterface.php
+++ b/core/lib/Drupal/Core/Database/Query/ConditionInterface.php
@@ -86,7 +86,7 @@ public function condition($field, $value = NULL, $operator = '=');
    * @return \Drupal\Core\Database\Query\ConditionInterface
    *   The called object.
    */
-  public function where($snippet, $args = array());
+  public function where($snippet, $args = []);
 
   /**
    * Sets a condition that the specified field be NULL.
diff --git a/core/lib/Drupal/Core/Database/Query/Delete.php b/core/lib/Drupal/Core/Database/Query/Delete.php
index 65f96c947489002094ce31cab3a92787e81fd4d3..def88385e0beff4b3696eec04710ed4515bfa4c2 100644
--- a/core/lib/Drupal/Core/Database/Query/Delete.php
+++ b/core/lib/Drupal/Core/Database/Query/Delete.php
@@ -31,7 +31,7 @@ class Delete extends Query implements ConditionInterface {
    * @param array $options
    *   Array of database options.
    */
-  public function __construct(Connection $connection, $table, array $options = array()) {
+  public function __construct(Connection $connection, $table, array $options = []) {
     $options['return'] = Database::RETURN_AFFECTED;
     parent::__construct($connection, $options);
     $this->table = $table;
@@ -46,7 +46,7 @@ public function __construct(Connection $connection, $table, array $options = arr
    *   The number of rows affected by the delete query.
    */
   public function execute() {
-    $values = array();
+    $values = [];
     if (count($this->condition)) {
       $this->condition->compile($this->connection, $this);
       $values = $this->condition->arguments();
diff --git a/core/lib/Drupal/Core/Database/Query/Insert.php b/core/lib/Drupal/Core/Database/Query/Insert.php
index c8f99215919058eb6a143c5717293f8e9504b7a6..3af2d2ac6ff831bbff8f1f00c189e904cbe3f16b 100644
--- a/core/lib/Drupal/Core/Database/Query/Insert.php
+++ b/core/lib/Drupal/Core/Database/Query/Insert.php
@@ -30,7 +30,7 @@ class Insert extends Query implements \Countable {
    * @param array $options
    *   Array of database options.
    */
-  public function __construct($connection, $table, array $options = array()) {
+  public function __construct($connection, $table, array $options = []) {
     if (!isset($options['return'])) {
       $options['return'] = Database::RETURN_INSERT_ID;
     }
@@ -97,7 +97,7 @@ public function execute() {
     }
 
     // Re-initialize the values array so that we can re-use this query.
-    $this->insertValues = array();
+    $this->insertValues = [];
 
     // Transaction commits here where $transaction looses scope.
 
@@ -124,7 +124,7 @@ public function __toString() {
     // For simplicity, we will use the $placeholders array to inject
     // default keywords even though they are not, strictly speaking,
     // placeholders for prepared statements.
-    $placeholders = array();
+    $placeholders = [];
     $placeholders = array_pad($placeholders, count($this->defaultFields), 'default');
     $placeholders = array_pad($placeholders, count($this->insertFields), '?');
 
diff --git a/core/lib/Drupal/Core/Database/Query/InsertTrait.php b/core/lib/Drupal/Core/Database/Query/InsertTrait.php
index a97c132b8b483bc644c0e989d8ae8edc222b52e3..f291da1a8103fbe8d86a0cc4ebd713dc774f8e1c 100644
--- a/core/lib/Drupal/Core/Database/Query/InsertTrait.php
+++ b/core/lib/Drupal/Core/Database/Query/InsertTrait.php
@@ -21,14 +21,14 @@ trait InsertTrait {
    *
    * @var array
    */
-  protected $insertFields = array();
+  protected $insertFields = [];
 
   /**
    * An array of fields that should be set to their database-defined defaults.
    *
    * @var array
    */
-  protected $defaultFields = array();
+  protected $defaultFields = [];
 
   /**
    * A nested array of values to insert.
@@ -45,7 +45,7 @@ trait InsertTrait {
    *
    * @var array
    */
-  protected $insertValues = array();
+  protected $insertValues = [];
 
   /**
    * Adds a set of field->value pairs to be inserted.
@@ -67,7 +67,7 @@ trait InsertTrait {
    * @return $this
    *   The called object.
    */
-  public function fields(array $fields, array $values = array()) {
+  public function fields(array $fields, array $values = []) {
     if (empty($this->insertFields)) {
       if (empty($values)) {
         if (!is_numeric(key($fields))) {
@@ -150,10 +150,10 @@ public function useDefaults(array $fields) {
    */
   protected function getInsertPlaceholderFragment(array $nested_insert_values, array $default_fields) {
     $max_placeholder = 0;
-    $values = array();
+    $values = [];
     if ($nested_insert_values) {
       foreach ($nested_insert_values as $insert_values) {
-        $placeholders = array();
+        $placeholders = [];
 
         // Default fields aren't really placeholders, but this is the most convenient
         // way to handle them.
diff --git a/core/lib/Drupal/Core/Database/Query/Merge.php b/core/lib/Drupal/Core/Database/Query/Merge.php
index 8bd02fab9ccf71d97f9ffdc7d08e9745ced3e20d..43188ec8ca7be8f5d1174b9a335d121cb682783d 100644
--- a/core/lib/Drupal/Core/Database/Query/Merge.php
+++ b/core/lib/Drupal/Core/Database/Query/Merge.php
@@ -74,7 +74,7 @@ class Merge extends Query implements ConditionInterface {
    *
    * @var array
    */
-  protected $insertFields = array();
+  protected $insertFields = [];
 
   /**
    * An array of fields which should be set to their database-defined defaults.
@@ -83,21 +83,21 @@ class Merge extends Query implements ConditionInterface {
    *
    * @var array
    */
-  protected $defaultFields = array();
+  protected $defaultFields = [];
 
   /**
    * An array of values to be inserted.
    *
    * @var string
    */
-  protected $insertValues = array();
+  protected $insertValues = [];
 
   /**
    * An array of fields that will be updated.
    *
    * @var array
    */
-  protected $updateFields = array();
+  protected $updateFields = [];
 
   /**
    * Array of fields to update to an expression in case of a duplicate record.
@@ -112,7 +112,7 @@ class Merge extends Query implements ConditionInterface {
    *
    * @var array
    */
-  protected $expressionFields = array();
+  protected $expressionFields = [];
 
   /**
    * Flag indicating whether an UPDATE is necessary.
@@ -131,7 +131,7 @@ class Merge extends Query implements ConditionInterface {
    * @param array $options
    *   Array of database options.
    */
-  public function __construct(Connection $connection, $table, array $options = array()) {
+  public function __construct(Connection $connection, $table, array $options = []) {
     $options['return'] = Database::RETURN_AFFECTED;
     parent::__construct($connection, $options);
     $this->table = $table;
@@ -190,10 +190,10 @@ public function updateFields(array $fields) {
    *   The called object.
    */
   public function expression($field, $expression, array $arguments = NULL) {
-    $this->expressionFields[$field] = array(
+    $this->expressionFields[$field] = [
       'expression' => $expression,
       'arguments' => $arguments,
-    );
+    ];
     $this->needsUpdate = TRUE;
     return $this;
   }
@@ -214,7 +214,7 @@ public function expression($field, $expression, array $arguments = NULL) {
    * @return \Drupal\Core\Database\Query\Merge
    *   The called object.
    */
-  public function insertFields(array $fields, array $values = array()) {
+  public function insertFields(array $fields, array $values = []) {
     if ($values) {
       $fields = array_combine($fields, $values);
     }
@@ -267,7 +267,7 @@ public function useDefaults(array $fields) {
    * @return \Drupal\Core\Database\Query\Merge
    *   The called object.
    */
-  public function fields(array $fields, array $values = array()) {
+  public function fields(array $fields, array $values = []) {
     if ($values) {
       $fields = array_combine($fields, $values);
     }
@@ -300,7 +300,7 @@ public function fields(array $fields, array $values = array()) {
    *
    * @return $this
    */
-  public function keys(array $fields, array $values = array()) {
+  public function keys(array $fields, array $values = []) {
     if ($values) {
       $fields = array_combine($fields, $values);
     }
@@ -329,10 +329,10 @@ public function keys(array $fields, array $values = array()) {
   public function key($field, $value = NULL) {
     // @todo D9: Remove this backwards-compatibility shim.
     if (is_array($field)) {
-      $this->keys($field, isset($value) ? $value : array());
+      $this->keys($field, isset($value) ? $value : []);
     }
     else {
-      $this->keys(array($field => $value));
+      $this->keys([$field => $value]);
     }
     return $this;
   }
@@ -351,9 +351,9 @@ public function __toString() {
 
   public function execute() {
     // Default options for merge queries.
-    $this->queryOptions += array(
+    $this->queryOptions += [
       'throw_exception' => TRUE,
-    );
+    ];
 
     try {
       if (!count($this->condition)) {
diff --git a/core/lib/Drupal/Core/Database/Query/Query.php b/core/lib/Drupal/Core/Database/Query/Query.php
index 6fe3db5b60fda775468677850be9bf0855bb3b8d..94f71a5a4e4634da80548502d529cd598e49f507 100644
--- a/core/lib/Drupal/Core/Database/Query/Query.php
+++ b/core/lib/Drupal/Core/Database/Query/Query.php
@@ -56,7 +56,7 @@ abstract class Query implements PlaceholderInterface {
    *
    * @var array
    */
-  protected $comments = array();
+  protected $comments = [];
 
   /**
    * Constructs a Query object.
diff --git a/core/lib/Drupal/Core/Database/Query/QueryConditionTrait.php b/core/lib/Drupal/Core/Database/Query/QueryConditionTrait.php
index bc7ed5a15b397729e9c9eb4103ac5c37b11d5329..44cc2208afe54292b0c68e9ccb8abe90f33afe15 100644
--- a/core/lib/Drupal/Core/Database/Query/QueryConditionTrait.php
+++ b/core/lib/Drupal/Core/Database/Query/QueryConditionTrait.php
@@ -77,7 +77,7 @@ public function arguments() {
   /**
    * {@inheritdoc}
    */
-  public function where($snippet, $args = array()) {
+  public function where($snippet, $args = []) {
     $this->condition->where($snippet, $args);
     return $this;
   }
diff --git a/core/lib/Drupal/Core/Database/Query/Select.php b/core/lib/Drupal/Core/Database/Query/Select.php
index 04efcf4eaabd3b6894f4115b1d4586649a67869b..b3426e6d4de903ac7fc9c99064fb8ae05b7e9e74 100644
--- a/core/lib/Drupal/Core/Database/Query/Select.php
+++ b/core/lib/Drupal/Core/Database/Query/Select.php
@@ -19,14 +19,14 @@ class Select extends Query implements SelectInterface {
    *
    * @var array
    */
-  protected $fields = array();
+  protected $fields = [];
 
   /**
    * The expressions to SELECT as virtual fields.
    *
    * @var array
    */
-  protected $expressions = array();
+  protected $expressions = [];
 
   /**
    * The tables against which to JOIN.
@@ -52,7 +52,7 @@ class Select extends Query implements SelectInterface {
    *
    * @var array
    */
-  protected $tables = array();
+  protected $tables = [];
 
   /**
    * The fields by which to order this query.
@@ -62,14 +62,14 @@ class Select extends Query implements SelectInterface {
    *
    * @var array
    */
-  protected $order = array();
+  protected $order = [];
 
   /**
    * The fields by which to group.
    *
    * @var array
    */
-  protected $group = array();
+  protected $group = [];
 
   /**
    * The conditional object for the HAVING clause.
@@ -103,7 +103,7 @@ class Select extends Query implements SelectInterface {
    *
    * @var array
    */
-  protected $union = array();
+  protected $union = [];
 
   /**
    * Indicates if preExecute() has already been called.
@@ -128,7 +128,7 @@ class Select extends Query implements SelectInterface {
    * @param array $options
    *   Array of query options.
    */
-  public function __construct($table, $alias = NULL, Connection $connection, $options = array()) {
+  public function __construct($table, $alias = NULL, Connection $connection, $options = []) {
     $options['return'] = Database::RETURN_STATEMENT;
     parent::__construct($connection, $options);
     $conjunction = isset($options['conjunction']) ? $options['conjunction'] : 'AND';
@@ -300,7 +300,7 @@ public function havingArguments() {
   /**
    * {@inheritdoc}
    */
-  public function having($snippet, $args = array()) {
+  public function having($snippet, $args = []) {
     $this->having->where($snippet, $args);
     return $this;
   }
@@ -467,11 +467,11 @@ public function preExecute(SelectInterface $query = NULL) {
       //   issue.
       // - Emit E_USER_DEPRECATED if term_access is used.
       //   https://www.drupal.org/node/2575081
-      $term_access_tags = array('term_access' => 1, 'taxonomy_term_access' => 1);
+      $term_access_tags = ['term_access' => 1, 'taxonomy_term_access' => 1];
       if (array_intersect_key($this->alterTags, $term_access_tags)) {
         $this->alterTags += $term_access_tags;
       }
-      $hooks = array('query');
+      $hooks = ['query'];
       foreach ($this->alterTags as $tag => $value) {
         $hooks[] = 'query_' . $tag;
       }
@@ -538,11 +538,11 @@ public function addField($table_alias, $field, $alias = NULL) {
     }
     $alias = $alias_candidate;
 
-    $this->fields[$alias] = array(
+    $this->fields[$alias] = [
       'field' => $field,
       'table' => $table_alias,
       'alias' => $alias,
-    );
+    ];
 
     return $alias;
   }
@@ -550,7 +550,7 @@ public function addField($table_alias, $field, $alias = NULL) {
   /**
    * {@inheritdoc}
    */
-  public function fields($table_alias, array $fields = array()) {
+  public function fields($table_alias, array $fields = []) {
     if ($fields) {
       foreach ($fields as $field) {
         // We don't care what alias was assigned.
@@ -568,7 +568,7 @@ public function fields($table_alias, array $fields = array()) {
   /**
    * {@inheritdoc}
    */
-  public function addExpression($expression, $alias = NULL, $arguments = array()) {
+  public function addExpression($expression, $alias = NULL, $arguments = []) {
     if (empty($alias)) {
       $alias = 'expression';
     }
@@ -580,11 +580,11 @@ public function addExpression($expression, $alias = NULL, $arguments = array())
     }
     $alias = $alias_candidate;
 
-    $this->expressions[$alias] = array(
+    $this->expressions[$alias] = [
       'expression' => $expression,
       'alias' => $alias,
       'arguments' => $arguments,
-    );
+    ];
 
     return $alias;
   }
@@ -592,35 +592,35 @@ public function addExpression($expression, $alias = NULL, $arguments = array())
   /**
    * {@inheritdoc}
    */
-  public function join($table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function join($table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->addJoin('INNER', $table, $alias, $condition, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function innerJoin($table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function innerJoin($table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->addJoin('INNER', $table, $alias, $condition, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function leftJoin($table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function leftJoin($table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->addJoin('LEFT OUTER', $table, $alias, $condition, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function rightJoin($table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function rightJoin($table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->addJoin('RIGHT OUTER', $table, $alias, $condition, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function addJoin($type, $table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function addJoin($type, $table, $alias = NULL, $condition = NULL, $arguments = []) {
     if (empty($alias)) {
       if ($table instanceof SelectInterface) {
         $alias = 'subquery';
@@ -641,13 +641,13 @@ public function addJoin($type, $table, $alias = NULL, $condition = NULL, $argume
       $condition = str_replace('%alias', $alias, $condition);
     }
 
-    $this->tables[$alias] = array(
+    $this->tables[$alias] = [
       'join type' => $type,
       'table' => $table,
       'alias' => $alias,
       'condition' => $condition,
       'arguments' => $arguments,
-    );
+    ];
 
     return $alias;
   }
@@ -675,7 +675,7 @@ public function orderRandom() {
    * {@inheritdoc}
    */
   public function range($start = NULL, $length = NULL) {
-    $this->range = $start !== NULL ? array('start' => $start, 'length' => $length) : array();
+    $this->range = $start !== NULL ? ['start' => $start, 'length' => $length] : [];
     return $this;
   }
 
@@ -696,10 +696,10 @@ public function union(SelectInterface $query, $type = '') {
       default:
     }
 
-    $this->union[] = array(
+    $this->union[] = [
       'type' => $type,
       'query' => $query,
-    );
+    ];
 
     return $this;
   }
@@ -770,7 +770,7 @@ protected function prepareCountQuery() {
     // Ordering a count query is a waste of cycles, and breaks on some
     // databases anyway.
     $orders = &$count->getOrderBy();
-    $orders = array();
+    $orders = [];
 
     if ($count->distinct && !empty($group_by)) {
       // If the query is distinct and contains a GROUP BY, we need to remove the
@@ -809,7 +809,7 @@ public function __toString() {
     }
 
     // FIELDS and EXPRESSIONS
-    $fields = array();
+    $fields = [];
     foreach ($this->tables as $alias => $table) {
       if (!empty($table['all_fields'])) {
         $fields[] = $this->connection->escapeTable($alias) . '.*';
@@ -886,7 +886,7 @@ public function __toString() {
     // ORDER BY
     if ($this->order) {
       $query .= "\nORDER BY ";
-      $fields = array();
+      $fields = [];
       foreach ($this->order as $field => $direction) {
         $fields[] = $this->connection->escapeField($field) . ' ' . $direction;
       }
diff --git a/core/lib/Drupal/Core/Database/Query/SelectExtender.php b/core/lib/Drupal/Core/Database/Query/SelectExtender.php
index 808593c58cb5385b05e887ce7d11f95eacfc5a62..56fe7c132519556b59e37feca4450a41009dc009 100644
--- a/core/lib/Drupal/Core/Database/Query/SelectExtender.php
+++ b/core/lib/Drupal/Core/Database/Query/SelectExtender.php
@@ -72,14 +72,14 @@ public function hasTag($tag) {
    * {@inheritdoc}
    */
   public function hasAllTags() {
-    return call_user_func_array(array($this->query, 'hasAllTags'), func_get_args());
+    return call_user_func_array([$this->query, 'hasAllTags'], func_get_args());
   }
 
   /**
    * {@inheritdoc}
    */
   public function hasAnyTag() {
-    return call_user_func_array(array($this->query, 'hasAnyTag'), func_get_args());
+    return call_user_func_array([$this->query, 'hasAnyTag'], func_get_args());
   }
 
   /**
@@ -122,7 +122,7 @@ public function arguments() {
   /**
    * {@inheritdoc}
    */
-  public function where($snippet, $args = array()) {
+  public function where($snippet, $args = []) {
     $this->query->where($snippet, $args);
     return $this;
   }
@@ -166,7 +166,7 @@ public function havingArguments() {
   /**
    * {@inheritdoc}
    */
-  public function having($snippet, $args = array()) {
+  public function having($snippet, $args = []) {
     $this->query->having($snippet, $args);
     return $this;
   }
@@ -335,7 +335,7 @@ public function addField($table_alias, $field, $alias = NULL) {
   /**
    * {@inheritdoc}
    */
-  public function fields($table_alias, array $fields = array()) {
+  public function fields($table_alias, array $fields = []) {
     $this->query->fields($table_alias, $fields);
     return $this;
   }
@@ -343,42 +343,42 @@ public function fields($table_alias, array $fields = array()) {
   /**
    * {@inheritdoc}
    */
-  public function addExpression($expression, $alias = NULL, $arguments = array()) {
+  public function addExpression($expression, $alias = NULL, $arguments = []) {
     return $this->query->addExpression($expression, $alias, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function join($table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function join($table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->query->join($table, $alias, $condition, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function innerJoin($table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function innerJoin($table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->query->innerJoin($table, $alias, $condition, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function leftJoin($table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function leftJoin($table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->query->leftJoin($table, $alias, $condition, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function rightJoin($table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function rightJoin($table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->query->rightJoin($table, $alias, $condition, $arguments);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function addJoin($type, $table, $alias = NULL, $condition = NULL, $arguments = array()) {
+  public function addJoin($type, $table, $alias = NULL, $condition = NULL, $arguments = []) {
     return $this->query->addJoin($type, $table, $alias, $condition, $arguments);
   }
 
@@ -497,7 +497,7 @@ public function __clone() {
    * to handle any additional methods.
    */
   public function __call($method, $args) {
-    $return = call_user_func_array(array($this->query, $method), $args);
+    $return = call_user_func_array([$this->query, $method], $args);
 
     // Some methods will return the called object as part of a fluent interface.
     // Others will return some useful value.  If it's a value, then the caller
diff --git a/core/lib/Drupal/Core/Database/Query/SelectInterface.php b/core/lib/Drupal/Core/Database/Query/SelectInterface.php
index aa358d3c29f4dace167fc3b70f7822a6cbfe331f..59b15d0790c1938d0766c68991d9c8edafe3b876 100644
--- a/core/lib/Drupal/Core/Database/Query/SelectInterface.php
+++ b/core/lib/Drupal/Core/Database/Query/SelectInterface.php
@@ -214,7 +214,7 @@ public function addField($table_alias, $field, $alias = NULL);
    * @return \Drupal\Core\Database\Query\SelectInterface
    *   The called object.
    */
-  public function fields($table_alias, array $fields = array());
+  public function fields($table_alias, array $fields = []);
 
   /**
    * Adds an expression to the list of "fields" to be SELECTed.
@@ -235,7 +235,7 @@ public function fields($table_alias, array $fields = array());
    * @return
    *   The unique alias that was assigned for this expression.
    */
-  public function addExpression($expression, $alias = NULL, $arguments = array());
+  public function addExpression($expression, $alias = NULL, $arguments = []);
 
   /**
    * Default Join against another table in the database.
@@ -263,7 +263,7 @@ public function addExpression($expression, $alias = NULL, $arguments = array());
    * @return
    *   The unique alias that was assigned for this table.
    */
-  public function join($table, $alias = NULL, $condition = NULL, $arguments = array());
+  public function join($table, $alias = NULL, $condition = NULL, $arguments = []);
 
   /**
    * Inner Join against another table in the database.
@@ -289,7 +289,7 @@ public function join($table, $alias = NULL, $condition = NULL, $arguments = arra
    * @return
    *   The unique alias that was assigned for this table.
    */
-  public function innerJoin($table, $alias = NULL, $condition = NULL, $arguments = array());
+  public function innerJoin($table, $alias = NULL, $condition = NULL, $arguments = []);
 
   /**
    * Left Outer Join against another table in the database.
@@ -315,7 +315,7 @@ public function innerJoin($table, $alias = NULL, $condition = NULL, $arguments =
    * @return
    *   The unique alias that was assigned for this table.
    */
-  public function leftJoin($table, $alias = NULL, $condition = NULL, $arguments = array());
+  public function leftJoin($table, $alias = NULL, $condition = NULL, $arguments = []);
 
   /**
    * Right Outer Join against another table in the database.
@@ -347,7 +347,7 @@ public function leftJoin($table, $alias = NULL, $condition = NULL, $arguments =
    *   db_query('B')->leftJoin('A'). This functionality has been deprecated
    *   because SQLite does not support it.
    */
-  public function rightJoin($table, $alias = NULL, $condition = NULL, $arguments = array());
+  public function rightJoin($table, $alias = NULL, $condition = NULL, $arguments = []);
 
   /**
    * Join against another table in the database.
@@ -380,7 +380,7 @@ public function rightJoin($table, $alias = NULL, $condition = NULL, $arguments =
    * @return
    *   The unique alias that was assigned for this table.
    */
-  public function addJoin($type, $table, $alias = NULL, $condition = NULL, $arguments = array());
+  public function addJoin($type, $table, $alias = NULL, $condition = NULL, $arguments = []);
 
   /**
    * Orders the result set by a given field.
@@ -574,7 +574,7 @@ public function havingArguments();
    *
    * @return $this
    */
-  public function having($snippet, $args = array());
+  public function having($snippet, $args = []);
 
   /**
    * Compiles the HAVING clause for later retrieval.
diff --git a/core/lib/Drupal/Core/Database/Query/TableSortExtender.php b/core/lib/Drupal/Core/Database/Query/TableSortExtender.php
index 285f1d6a9bb8f1246f4050055d7f95548b891cb2..4f739ee3049dcf36b50d8f69ab89c096ec256671 100644
--- a/core/lib/Drupal/Core/Database/Query/TableSortExtender.php
+++ b/core/lib/Drupal/Core/Database/Query/TableSortExtender.php
@@ -12,7 +12,7 @@ class TableSortExtender extends SelectExtender {
   /**
    * The array of fields that can be sorted by.
    */
-  protected $header = array();
+  protected $header = [];
 
   public function __construct(SelectInterface $query, Connection $connection) {
     parent::__construct($query, $connection);
diff --git a/core/lib/Drupal/Core/Database/Query/Truncate.php b/core/lib/Drupal/Core/Database/Query/Truncate.php
index 64520ee97eb194eeca625039a5c28e7d2d518495..1711adee551ac142f96dac9fcd78c03f2fe0d341 100644
--- a/core/lib/Drupal/Core/Database/Query/Truncate.php
+++ b/core/lib/Drupal/Core/Database/Query/Truncate.php
@@ -28,7 +28,7 @@ class Truncate extends Query {
    * @param array $options
    *   Array of database options.
    */
-  public function __construct(Connection $connection, $table, array $options = array()) {
+  public function __construct(Connection $connection, $table, array $options = []) {
     $options['return'] = Database::RETURN_AFFECTED;
     parent::__construct($connection, $options);
     $this->table = $table;
@@ -55,7 +55,7 @@ public function compiled() {
    *   Return value is dependent on the database type.
    */
   public function execute() {
-    return $this->connection->query((string) $this, array(), $this->queryOptions);
+    return $this->connection->query((string) $this, [], $this->queryOptions);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Database/Query/Update.php b/core/lib/Drupal/Core/Database/Query/Update.php
index d6b93b76f4d6c98bd0b07c0451cde94a738a4a9c..ba0661c7a08b2479cbd62d564f071b50a26fa566 100644
--- a/core/lib/Drupal/Core/Database/Query/Update.php
+++ b/core/lib/Drupal/Core/Database/Query/Update.php
@@ -26,14 +26,14 @@ class Update extends Query implements ConditionInterface {
    *
    * @var array
    */
-  protected $fields = array();
+  protected $fields = [];
 
   /**
    * An array of values to update to.
    *
    * @var array
    */
-  protected $arguments = array();
+  protected $arguments = [];
 
   /**
    * Array of fields to update to an expression in case of a duplicate record.
@@ -48,7 +48,7 @@ class Update extends Query implements ConditionInterface {
    *
    * @var array
    */
-  protected $expressionFields = array();
+  protected $expressionFields = [];
 
   /**
    * Constructs an Update query object.
@@ -60,7 +60,7 @@ class Update extends Query implements ConditionInterface {
    * @param array $options
    *   Array of database options.
    */
-  public function __construct(Connection $connection, $table, array $options = array()) {
+  public function __construct(Connection $connection, $table, array $options = []) {
     $options['return'] = Database::RETURN_AFFECTED;
     parent::__construct($connection, $options);
     $this->table = $table;
@@ -102,10 +102,10 @@ public function fields(array $fields) {
    *   The called object.
    */
   public function expression($field, $expression, array $arguments = NULL) {
-    $this->expressionFields[$field] = array(
+    $this->expressionFields[$field] = [
       'expression' => $expression,
       'arguments' => $arguments,
-    );
+    ];
 
     return $this;
   }
@@ -121,7 +121,7 @@ public function execute() {
     // Expressions take priority over literal fields, so we process those first
     // and remove any literal fields that conflict.
     $fields = $this->fields;
-    $update_values = array();
+    $update_values = [];
     foreach ($this->expressionFields as $field => $data) {
       if (!empty($data['arguments'])) {
         $update_values += $data['arguments'];
@@ -161,7 +161,7 @@ public function __toString() {
     // Expressions take priority over literal fields, so we process those first
     // and remove any literal fields that conflict.
     $fields = $this->fields;
-    $update_fields = array();
+    $update_fields = [];
     foreach ($this->expressionFields as $field => $data) {
       if ($data['expression'] instanceof SelectInterface) {
         // Compile and cast expression subquery to a string.
diff --git a/core/lib/Drupal/Core/Database/Query/Upsert.php b/core/lib/Drupal/Core/Database/Query/Upsert.php
index dec2d3b3ec6208e530ad1f10cd3fbc96d13f3d8a..a406d7ab97c29fea5e8e132cae4d8a6f898513e8 100644
--- a/core/lib/Drupal/Core/Database/Query/Upsert.php
+++ b/core/lib/Drupal/Core/Database/Query/Upsert.php
@@ -96,7 +96,7 @@ public function execute() {
     }
 
     $max_placeholder = 0;
-    $values = array();
+    $values = [];
     foreach ($this->insertValues as $insert_values) {
       foreach ($insert_values as $value) {
         $values[':db_insert_placeholder_' . $max_placeholder++] = $value;
@@ -106,7 +106,7 @@ public function execute() {
     $last_insert_id = $this->connection->query((string) $this, $values, $this->queryOptions);
 
     // Re-initialize the values array so that we can re-use this query.
-    $this->insertValues = array();
+    $this->insertValues = [];
 
     return $last_insert_id;
   }
diff --git a/core/lib/Drupal/Core/Database/Schema.php b/core/lib/Drupal/Core/Database/Schema.php
index 8b9eb7e129ddd8a1678c9d90e2f775eccc1adef9..eb98bb1d58881c936dd71efb68a69ff086cbb465 100644
--- a/core/lib/Drupal/Core/Database/Schema.php
+++ b/core/lib/Drupal/Core/Database/Schema.php
@@ -77,10 +77,10 @@ public function nextPlaceholder() {
    *   A keyed array with information about the schema, table name and prefix.
    */
   protected function getPrefixInfo($table = 'default', $add_prefix = TRUE) {
-    $info = array(
+    $info = [
       'schema' => $this->defaultSchema,
       'prefix' => $this->connection->tablePrefix($table),
-    );
+    ];
     if ($add_prefix) {
       $table = $info['prefix'] . $table;
     }
@@ -224,7 +224,7 @@ public function findTables($table_expression) {
 
     // Convert the table expression from its SQL LIKE syntax to a regular
     // expression and escape the delimiter that will be used for matching.
-    $table_expression = str_replace(array('%', '_'), array('.*?', '.'), preg_quote($table_expression, '/'));
+    $table_expression = str_replace(['%', '_'], ['.*?', '.'], preg_quote($table_expression, '/'));
     $tables = preg_grep('/^' . $table_expression . '$/i', $tables);
 
     return $tables;
@@ -320,7 +320,7 @@ abstract public function dropTable($table);
    * @throws \Drupal\Core\Database\SchemaObjectExistsException
    *   If the specified table already has a field by that name.
    */
-  abstract public function addField($table, $field, $spec, $keys_new = array());
+  abstract public function addField($table, $field, $spec, $keys_new = []);
 
   /**
    * Drop a field.
@@ -576,7 +576,7 @@ abstract public function dropIndex($table, $name);
    * @throws \Drupal\Core\Database\SchemaObjectExistsException
    *   If the specified destination field already exists.
    */
-  abstract public function changeField($table, $field, $field_new, $spec, $keys_new = array());
+  abstract public function changeField($table, $field, $field_new, $spec, $keys_new = []);
 
   /**
    * Create a new table from a Drupal table definition.
@@ -591,7 +591,7 @@ abstract public function changeField($table, $field, $field_new, $spec, $keys_ne
    */
   public function createTable($name, $table) {
     if ($this->tableExists($name)) {
-      throw new SchemaObjectExistsException(t('Table @name already exists.', array('@name' => $name)));
+      throw new SchemaObjectExistsException(t('Table @name already exists.', ['@name' => $name]));
     }
     $statements = $this->createTableSql($name, $table);
     foreach ($statements as $statement) {
@@ -612,7 +612,7 @@ public function createTable($name, $table) {
    *   An array of field names.
    */
   public function fieldNames($fields) {
-    $return = array();
+    $return = [];
     foreach ($fields as $field) {
       if (is_array($field)) {
         $return[] = $field[0];
diff --git a/core/lib/Drupal/Core/Database/Statement.php b/core/lib/Drupal/Core/Database/Statement.php
index d44853279bab395c93dc2c4158640d5685249dcc..8060fbcde596e92466de1a26cada061fb65086f3 100644
--- a/core/lib/Drupal/Core/Database/Statement.php
+++ b/core/lib/Drupal/Core/Database/Statement.php
@@ -39,7 +39,7 @@ protected function __construct(Connection $dbh) {
   /**
    * {@inheritdoc}
    */
-  public function execute($args = array(), $options = array()) {
+  public function execute($args = [], $options = []) {
     if (isset($options['fetch'])) {
       if (is_string($options['fetch'])) {
         // \PDO::FETCH_PROPS_LATE tells __construct() to run before properties
@@ -84,7 +84,7 @@ public function fetchCol($index = 0) {
    * {@inheritdoc}
    */
   public function fetchAllAssoc($key, $fetch = NULL) {
-    $return = array();
+    $return = [];
     if (isset($fetch)) {
       if (is_string($fetch)) {
         $this->setFetchMode(\PDO::FETCH_CLASS, $fetch);
@@ -106,7 +106,7 @@ public function fetchAllAssoc($key, $fetch = NULL) {
    * {@inheritdoc}
    */
   public function fetchAllKeyed($key_index = 0, $value_index = 1) {
-    $return = array();
+    $return = [];
     $this->setFetchMode(\PDO::FETCH_NUM);
     foreach ($this as $record) {
       $return[$record[$key_index]] = $record[$value_index];
@@ -146,7 +146,7 @@ public function rowCount() {
   /**
    * {@inheritdoc}
    */
-  public function setFetchMode($mode, $a1 = NULL, $a2 = array()) {
+  public function setFetchMode($mode, $a1 = NULL, $a2 = []) {
     // Call \PDOStatement::setFetchMode to set fetch mode.
     // \PDOStatement is picky about the number of arguments in some cases so we
     // need to be pass the exact number of arguments we where given.
diff --git a/core/lib/Drupal/Core/Database/StatementEmpty.php b/core/lib/Drupal/Core/Database/StatementEmpty.php
index 32b29d5e90a9a6f7ff0a36413486251ff805fb87..343b90ce8e8b0f7e6b5060391b9bde22d04a1deb 100644
--- a/core/lib/Drupal/Core/Database/StatementEmpty.php
+++ b/core/lib/Drupal/Core/Database/StatementEmpty.php
@@ -26,7 +26,7 @@ class StatementEmpty implements \Iterator, StatementInterface {
   /**
    * {@inheritdoc}
    */
-  public function execute($args = array(), $options = array()) {
+  public function execute($args = [], $options = []) {
     return FALSE;
   }
 
@@ -50,7 +50,7 @@ public function rowCount() {
   /**
    * {@inheritdoc}
    */
-  public function setFetchMode($mode, $a1 = NULL, $a2 = array()) {
+  public function setFetchMode($mode, $a1 = NULL, $a2 = []) {
     return;
   }
 
@@ -86,28 +86,28 @@ public function fetchAssoc() {
    * {@inheritdoc}
    */
   public function fetchAll($mode = NULL, $column_index = NULL, $constructor_arguments = NULL) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fetchCol($index = 0) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fetchAllKeyed($key_index = 0, $value_index = 1) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fetchAllAssoc($key, $fetch = NULL) {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Database/StatementInterface.php b/core/lib/Drupal/Core/Database/StatementInterface.php
index 971d031e032ba847fc7be9bccd2940d2d6cec4e7..c0ee92936a37c0d2cf44166788feaa7e49e5c75f 100644
--- a/core/lib/Drupal/Core/Database/StatementInterface.php
+++ b/core/lib/Drupal/Core/Database/StatementInterface.php
@@ -51,7 +51,7 @@ interface StatementInterface extends \Traversable {
    * @return
    *   TRUE on success, or FALSE on failure.
    */
-  public function execute($args = array(), $options = array());
+  public function execute($args = [], $options = []);
 
   /**
    * Gets the query string of this statement.
@@ -90,7 +90,7 @@ public function rowCount();
    *   If $mode is PDO::FETCH_CLASS, the optional arguments to pass to the
    *   constructor.
    */
-  public function setFetchMode($mode, $a1 = NULL, $a2 = array());
+  public function setFetchMode($mode, $a1 = NULL, $a2 = []);
 
   /**
    * Fetches the next row from a result set.
diff --git a/core/lib/Drupal/Core/Database/StatementPrefetch.php b/core/lib/Drupal/Core/Database/StatementPrefetch.php
index 6864f00ef3b262de957d268f47844b7bac02caa3..80252209e694ba9de0917f05a8c905fcf1f55ab8 100644
--- a/core/lib/Drupal/Core/Database/StatementPrefetch.php
+++ b/core/lib/Drupal/Core/Database/StatementPrefetch.php
@@ -43,7 +43,7 @@ class StatementPrefetch implements \Iterator, StatementInterface {
    *
    * @var Array
    */
-  protected $data = array();
+  protected $data = [];
 
   /**
    * The current row, retrieved in \PDO::FETCH_ASSOC format.
@@ -93,12 +93,12 @@ class StatementPrefetch implements \Iterator, StatementInterface {
    *
    * @var Array
    */
-  protected $fetchOptions = array(
+  protected $fetchOptions = [
     'class' => 'stdClass',
-    'constructor_args' => array(),
+    'constructor_args' => [],
     'object' => NULL,
     'column' => 0,
-  );
+  ];
 
   /**
    * Holds the default fetch style.
@@ -112,12 +112,12 @@ class StatementPrefetch implements \Iterator, StatementInterface {
    *
    * @var Array
    */
-  protected $defaultFetchOptions = array(
+  protected $defaultFetchOptions = [
     'class' => 'stdClass',
-    'constructor_args' => array(),
+    'constructor_args' => [],
     'object' => NULL,
     'column' => 0,
-  );
+  ];
 
   /**
    * Is rowCount() execution allowed.
@@ -126,7 +126,7 @@ class StatementPrefetch implements \Iterator, StatementInterface {
    */
   public $allowRowCount = FALSE;
 
-  public function __construct(\PDO $pdo_connection, Connection $connection, $query, array $driver_options = array()) {
+  public function __construct(\PDO $pdo_connection, Connection $connection, $query, array $driver_options = []) {
     $this->pdoConnection = $pdo_connection;
     $this->dbh = $connection;
     $this->queryString = $query;
@@ -136,7 +136,7 @@ public function __construct(\PDO $pdo_connection, Connection $connection, $query
   /**
    * {@inheritdoc}
    */
-  public function execute($args = array(), $options = array()) {
+  public function execute($args = [], $options = []) {
     if (isset($options['fetch'])) {
       if (is_string($options['fetch'])) {
         // Default to an object. Note: db fields will be added to the object
@@ -181,7 +181,7 @@ public function execute($args = array(), $options = array()) {
       $this->columnNames = array_keys($this->data[0]);
     }
     else {
-      $this->columnNames = array();
+      $this->columnNames = [];
     }
 
     if (!empty($logger)) {
@@ -219,7 +219,7 @@ protected function throwPDOException() {
    * @return \PDOStatement
    *   A PDOStatement object.
    */
-  protected function getStatement($query, &$args = array()) {
+  protected function getStatement($query, &$args = []) {
     return $this->dbh->prepare($query);
   }
 
@@ -233,7 +233,7 @@ public function getQueryString() {
   /**
    * {@inheritdoc}
    */
-  public function setFetchMode($mode, $a1 = NULL, $a2 = array()) {
+  public function setFetchMode($mode, $a1 = NULL, $a2 = []) {
     $this->defaultFetchStyle = $mode;
     switch ($mode) {
       case \PDO::FETCH_CLASS:
@@ -409,7 +409,7 @@ public function fetchField($index = 0) {
   /**
    * {@inheritdoc}
    */
-  public function fetchObject($class_name = NULL, $constructor_args = array()) {
+  public function fetchObject($class_name = NULL, $constructor_args = []) {
     if (isset($this->currentRow)) {
       if (!isset($class_name)) {
         // Directly cast to an object to avoid a function call.
@@ -417,7 +417,7 @@ public function fetchObject($class_name = NULL, $constructor_args = array()) {
       }
       else {
         $this->fetchStyle = \PDO::FETCH_CLASS;
-        $this->fetchOptions = array('constructor_args' => $constructor_args);
+        $this->fetchOptions = ['constructor_args' => $constructor_args];
         // Grab the row in the format specified above.
         $result = $this->current();
         // Reset the fetch parameters to the value stored using setFetchMode().
@@ -461,7 +461,7 @@ public function fetchAll($mode = NULL, $column_index = NULL, $constructor_argume
       $this->fetchOptions['constructor_args'] = $constructor_arguments;
     }
 
-    $result = array();
+    $result = [];
     // Traverse the array as PHP would have done.
     while (isset($this->currentRow)) {
       // Grab the row in the format specified above.
@@ -480,7 +480,7 @@ public function fetchAll($mode = NULL, $column_index = NULL, $constructor_argume
    */
   public function fetchCol($index = 0) {
     if (isset($this->columnNames[$index])) {
-      $result = array();
+      $result = [];
       // Traverse the array as PHP would have done.
       while (isset($this->currentRow)) {
         $result[] = $this->currentRow[$this->columnNames[$index]];
@@ -489,7 +489,7 @@ public function fetchCol($index = 0) {
       return $result;
     }
     else {
-      return array();
+      return [];
     }
   }
 
@@ -498,12 +498,12 @@ public function fetchCol($index = 0) {
    */
   public function fetchAllKeyed($key_index = 0, $value_index = 1) {
     if (!isset($this->columnNames[$key_index]) || !isset($this->columnNames[$value_index]))
-      return array();
+      return [];
 
     $key = $this->columnNames[$key_index];
     $value = $this->columnNames[$value_index];
 
-    $result = array();
+    $result = [];
     // Traverse the array as PHP would have done.
     while (isset($this->currentRow)) {
       $result[$this->currentRow[$key]] = $this->currentRow[$value];
@@ -519,7 +519,7 @@ public function fetchAllAssoc($key, $fetch_style = NULL) {
     $this->fetchStyle = isset($fetch_style) ? $fetch_style : $this->defaultFetchStyle;
     $this->fetchOptions = $this->defaultFetchOptions;
 
-    $result = array();
+    $result = [];
     // Traverse the array as PHP would have done.
     while (isset($this->currentRow)) {
       // Grab the row in its raw \PDO::FETCH_ASSOC format.
diff --git a/core/lib/Drupal/Core/Database/database.api.php b/core/lib/Drupal/Core/Database/database.api.php
index bf2f1fd3444b5321a65943ea0bb6433fc7391223..45a561872a72a2d15c6b37c1b347634279b9573a 100644
--- a/core/lib/Drupal/Core/Database/database.api.php
+++ b/core/lib/Drupal/Core/Database/database.api.php
@@ -484,60 +484,60 @@ function hook_query_TAG_alter(Drupal\Core\Database\Query\AlterableInterface $que
  * @ingroup schemaapi
  */
 function hook_schema() {
-  $schema['node'] = array(
+  $schema['node'] = [
     // Example (partial) specification for table "node".
     'description' => 'The base table for nodes.',
-    'fields' => array(
-      'nid' => array(
+    'fields' => [
+      'nid' => [
         'description' => 'The primary identifier for a node.',
         'type' => 'serial',
         'unsigned' => TRUE,
         'not null' => TRUE,
-      ),
-      'vid' => array(
+      ],
+      'vid' => [
         'description' => 'The current {node_field_revision}.vid version identifier.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'type' => array(
+      ],
+      'type' => [
         'description' => 'The type of this node.',
         'type' => 'varchar',
         'length' => 32,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'title' => array(
+      ],
+      'title' => [
         'description' => 'The node title.',
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
-      ),
-    ),
-    'indexes' => array(
-      'node_changed'        => array('changed'),
-      'node_created'        => array('created'),
-    ),
-    'unique keys' => array(
-      'nid_vid' => array('nid', 'vid'),
-      'vid'     => array('vid'),
-    ),
+      ],
+    ],
+    'indexes' => [
+      'node_changed'        => ['changed'],
+      'node_created'        => ['created'],
+    ],
+    'unique keys' => [
+      'nid_vid' => ['nid', 'vid'],
+      'vid'     => ['vid'],
+    ],
     // For documentation purposes only; foreign keys are not created in the
     // database.
-    'foreign keys' => array(
-      'node_revision' => array(
+    'foreign keys' => [
+      'node_revision' => [
         'table' => 'node_field_revision',
-        'columns' => array('vid' => 'vid'),
-      ),
-      'node_author' => array(
+        'columns' => ['vid' => 'vid'],
+      ],
+      'node_author' => [
         'table' => 'users',
-        'columns' => array('uid' => 'uid'),
-      ),
-    ),
-    'primary key' => array('nid'),
-  );
+        'columns' => ['uid' => 'uid'],
+      ],
+    ],
+    'primary key' => ['nid'],
+  ];
   return $schema;
 }
 
diff --git a/core/lib/Drupal/Core/Datetime/DateFormatter.php b/core/lib/Drupal/Core/Datetime/DateFormatter.php
index 421b03b51eb31c09e9eadbe8aee1d27f332879d8..77290803520dcc29ff0073ed656312153c9ff8a9 100644
--- a/core/lib/Drupal/Core/Datetime/DateFormatter.php
+++ b/core/lib/Drupal/Core/Datetime/DateFormatter.php
@@ -54,7 +54,7 @@ class DateFormatter implements DateFormatterInterface {
   protected $requestStack;
 
   protected $country = NULL;
-  protected $dateFormats = array();
+  protected $dateFormats = [];
 
   /**
    * Contains the different date interval units.
@@ -65,7 +65,7 @@ class DateFormatter implements DateFormatterInterface {
    *
    * @var array
    */
-  protected $units = array(
+  protected $units = [
     '1 year|@count years' => 31536000,
     '1 month|@count months' => 2592000,
     '1 week|@count weeks' => 604800,
@@ -73,7 +73,7 @@ class DateFormatter implements DateFormatterInterface {
     '1 hour|@count hours' => 3600,
     '1 min|@count min' => 60,
     '1 sec|@count sec' => 1,
-  );
+  ];
 
   /**
    * Constructs a Date object.
@@ -115,10 +115,10 @@ public function format($timestamp, $type = 'medium', $format = '', $timezone = N
     }
 
     // Create a DrupalDateTime object from the timestamp and timezone.
-    $create_settings = array(
+    $create_settings = [
       'langcode' => $langcode,
       'country' => $this->country(),
-    );
+    ];
     $date = DrupalDateTime::createFromTimestamp($timestamp, $this->timezones[$timezone], $create_settings);
 
     // If we have a non-custom date format use the provided date format pattern.
@@ -136,9 +136,9 @@ public function format($timestamp, $type = 'medium', $format = '', $timezone = N
     }
 
     // Call $date->format().
-    $settings = array(
+    $settings = [
       'langcode' => $langcode,
-    );
+    ];
     return $date->format($format, $settings);
   }
 
@@ -150,7 +150,7 @@ public function formatInterval($interval, $granularity = 2, $langcode = NULL) {
     foreach ($this->units as $key => $value) {
       $key = explode('|', $key);
       if ($interval >= $value) {
-        $output .= ($output ? ' ' : '') . $this->formatPlural(floor($interval / $value), $key[0], $key[1], array(), array('langcode' => $langcode));
+        $output .= ($output ? ' ' : '') . $this->formatPlural(floor($interval / $value), $key[0], $key[1], [], ['langcode' => $langcode]);
         $interval %= $value;
         $granularity--;
       }
@@ -164,7 +164,7 @@ public function formatInterval($interval, $granularity = 2, $langcode = NULL) {
         break;
       }
     }
-    return $output ? $output : $this->t('0 sec', array(), array('langcode' => $langcode));
+    return $output ? $output : $this->t('0 sec', [], ['langcode' => $langcode]);
   }
 
   /**
@@ -183,7 +183,7 @@ public function getSampleDateFormats($langcode = NULL, $timestamp = NULL, $timez
   /**
    * {@inheritdoc}
    */
-  public function formatTimeDiffUntil($timestamp, $options = array()) {
+  public function formatTimeDiffUntil($timestamp, $options = []) {
     $request_time = $this->requestStack->getCurrentRequest()->server->get('REQUEST_TIME');
     return $this->formatDiff($request_time, $timestamp, $options);
   }
@@ -191,7 +191,7 @@ public function formatTimeDiffUntil($timestamp, $options = array()) {
   /**
    * {@inheritdoc}
    */
-  public function formatTimeDiffSince($timestamp, $options = array()) {
+  public function formatTimeDiffSince($timestamp, $options = []) {
     $request_time = $this->requestStack->getCurrentRequest()->server->get('REQUEST_TIME');
     return $this->formatDiff($timestamp, $request_time, $options);
   }
@@ -199,14 +199,14 @@ public function formatTimeDiffSince($timestamp, $options = array()) {
   /**
    * {@inheritdoc}
    */
-  public function formatDiff($from, $to, $options = array()) {
+  public function formatDiff($from, $to, $options = []) {
 
-    $options += array(
+    $options += [
       'granularity' => 2,
       'langcode' => NULL,
       'strict' => TRUE,
       'return_as_object' => FALSE,
-    );
+    ];
 
     if ($options['strict'] && $from > $to) {
       $string = $this->t('0 seconds');
@@ -231,18 +231,18 @@ public function formatDiff($from, $to, $options = array()) {
     // don't take the "invert" property into account, the resulting output value
     // will always be positive.
     $max_age = 1e99;
-    foreach (array('y', 'm', 'd', 'h', 'i', 's') as $value) {
+    foreach (['y', 'm', 'd', 'h', 'i', 's'] as $value) {
       if ($interval->$value > 0) {
         // Switch over the keys to call formatPlural() explicitly with literal
         // strings for all different possibilities.
         switch ($value) {
           case 'y':
-            $interval_output = $this->formatPlural($interval->y, '1 year', '@count years', array(), array('langcode' => $options['langcode']));
+            $interval_output = $this->formatPlural($interval->y, '1 year', '@count years', [], ['langcode' => $options['langcode']]);
             $max_age = min($max_age, 365 * 86400);
             break;
 
           case 'm':
-            $interval_output = $this->formatPlural($interval->m, '1 month', '@count months', array(), array('langcode' => $options['langcode']));
+            $interval_output = $this->formatPlural($interval->m, '1 month', '@count months', [], ['langcode' => $options['langcode']]);
             $max_age = min($max_age, 30 * 86400);
             break;
 
@@ -253,14 +253,14 @@ public function formatDiff($from, $to, $options = array()) {
             $days = $interval->d;
             $weeks = floor($days / 7);
             if ($weeks) {
-              $interval_output .= $this->formatPlural($weeks, '1 week', '@count weeks', array(), array('langcode' => $options['langcode']));
+              $interval_output .= $this->formatPlural($weeks, '1 week', '@count weeks', [], ['langcode' => $options['langcode']]);
               $days -= $weeks * 7;
               $granularity--;
               $max_age = min($max_age, 7 * 86400);
             }
 
             if ((!$output || $weeks > 0) && $granularity > 0 && $days > 0) {
-              $interval_output .= ($interval_output ? ' ' : '') . $this->formatPlural($days, '1 day', '@count days', array(), array('langcode' => $options['langcode']));
+              $interval_output .= ($interval_output ? ' ' : '') . $this->formatPlural($days, '1 day', '@count days', [], ['langcode' => $options['langcode']]);
               $max_age = min($max_age, 86400);
             }
             else {
@@ -271,17 +271,17 @@ public function formatDiff($from, $to, $options = array()) {
             break;
 
           case 'h':
-            $interval_output = $this->formatPlural($interval->h, '1 hour', '@count hours', array(), array('langcode' => $options['langcode']));
+            $interval_output = $this->formatPlural($interval->h, '1 hour', '@count hours', [], ['langcode' => $options['langcode']]);
             $max_age = min($max_age, 3600);
             break;
 
           case 'i':
-            $interval_output = $this->formatPlural($interval->i, '1 minute', '@count minutes', array(), array('langcode' => $options['langcode']));
+            $interval_output = $this->formatPlural($interval->i, '1 minute', '@count minutes', [], ['langcode' => $options['langcode']]);
             $max_age = min($max_age, 60);
             break;
 
           case 's':
-            $interval_output = $this->formatPlural($interval->s, '1 second', '@count seconds', array(), array('langcode' => $options['langcode']));
+            $interval_output = $this->formatPlural($interval->s, '1 second', '@count seconds', [], ['langcode' => $options['langcode']]);
             $max_age = min($max_age, 1);
             break;
 
@@ -327,7 +327,7 @@ public function formatDiff($from, $to, $options = array()) {
   protected function dateFormat($format, $langcode) {
     if (!isset($this->dateFormats[$format][$langcode])) {
       $original_language = $this->languageManager->getConfigOverrideLanguage();
-      $this->languageManager->setConfigOverrideLanguage(new Language(array('id' => $langcode)));
+      $this->languageManager->setConfigOverrideLanguage(new Language(['id' => $langcode]));
       $this->dateFormats[$format][$langcode] = $this->dateFormatStorage->load($format);
       $this->languageManager->setConfigOverrideLanguage($original_language);
     }
diff --git a/core/lib/Drupal/Core/Datetime/DateFormatterInterface.php b/core/lib/Drupal/Core/Datetime/DateFormatterInterface.php
index 3515ee4da4daa8d1723c4cdf4b38aa7ef50a0627..6bddf8fe39f3777a84f309d26cee52236e374fc1 100644
--- a/core/lib/Drupal/Core/Datetime/DateFormatterInterface.php
+++ b/core/lib/Drupal/Core/Datetime/DateFormatterInterface.php
@@ -112,7 +112,7 @@ public function getSampleDateFormats($langcode = NULL, $timestamp = NULL, $timez
    * @see \Drupal\Core\Datetime\DateFormatterInterface::formatDiff()
    * @see \Drupal\Core\Datetime\DateFormatterInterface::formatTimeDiffSince()
    */
-  public function formatTimeDiffUntil($timestamp, $options = array());
+  public function formatTimeDiffUntil($timestamp, $options = []);
 
   /**
    * Formats the time difference from a timestamp to the current request time.
@@ -142,7 +142,7 @@ public function formatTimeDiffUntil($timestamp, $options = array());
    * @see \Drupal\Core\Datetime\DateFormatterInterface::formatDiff()
    * @see \Drupal\Core\Datetime\DateFormatterInterface::formatTimeDiffUntil()
    */
-  public function formatTimeDiffSince($timestamp, $options = array());
+  public function formatTimeDiffSince($timestamp, $options = []);
 
   /**
    * Formats a time interval between two timestamps.
@@ -174,6 +174,6 @@ public function formatTimeDiffSince($timestamp, $options = array());
    * @see \Drupal\Core\Datetime\DateFormatterInterface::formatTimeDiffSince()
    * @see \Drupal\Core\Datetime\DateFormatterInterface::formatTimeDiffUntil()
    */
-  public function formatDiff($from, $to, $options = array());
+  public function formatDiff($from, $to, $options = []);
 
 }
diff --git a/core/lib/Drupal/Core/Datetime/DateHelper.php b/core/lib/Drupal/Core/Datetime/DateHelper.php
index 70db9b3c41ea487612a41b55d8eaa6f5e1f1cd44..b3a8ce75d603cd73ead25613b750fdc4551635a1 100644
--- a/core/lib/Drupal/Core/Datetime/DateHelper.php
+++ b/core/lib/Drupal/Core/Datetime/DateHelper.php
@@ -27,7 +27,7 @@ class DateHelper {
   public static function monthNamesUntranslated() {
     // Force the key to use the correct month value, rather than
     // starting with zero.
-    return array(
+    return [
       1  => 'January',
       2  => 'February',
       3  => 'March',
@@ -40,7 +40,7 @@ public static function monthNamesUntranslated() {
       10 => 'October',
       11 => 'November',
       12 => 'December',
-    );
+    ];
   }
 
   /**
@@ -52,7 +52,7 @@ public static function monthNamesUntranslated() {
   public static function monthNamesAbbrUntranslated() {
     // Force the key to use the correct month value, rather than
     // starting with zero.
-    return array(
+    return [
       1  => 'Jan',
       2  => 'Feb',
       3  => 'Mar',
@@ -65,7 +65,7 @@ public static function monthNamesAbbrUntranslated() {
       10 => 'Oct',
       11 => 'Nov',
       12 => 'Dec',
-    );
+    ];
   }
 
   /**
@@ -81,21 +81,21 @@ public static function monthNamesAbbrUntranslated() {
   public static function monthNames($required = FALSE) {
     // Force the key to use the correct month value, rather than
     // starting with zero.
-    $monthnames = array(
-      1  => t('January', array(), array('context' => 'Long month name')),
-      2  => t('February', array(), array('context' => 'Long month name')),
-      3  => t('March', array(), array('context' => 'Long month name')),
-      4  => t('April', array(), array('context' => 'Long month name')),
-      5  => t('May', array(), array('context' => 'Long month name')),
-      6  => t('June', array(), array('context' => 'Long month name')),
-      7  => t('July', array(), array('context' => 'Long month name')),
-      8  => t('August', array(), array('context' => 'Long month name')),
-      9  => t('September', array(), array('context' => 'Long month name')),
-      10 => t('October', array(), array('context' => 'Long month name')),
-      11 => t('November', array(), array('context' => 'Long month name')),
-      12 => t('December', array(), array('context' => 'Long month name')),
-    );
-    $none = array('' => '');
+    $monthnames = [
+      1  => t('January', [], ['context' => 'Long month name']),
+      2  => t('February', [], ['context' => 'Long month name']),
+      3  => t('March', [], ['context' => 'Long month name']),
+      4  => t('April', [], ['context' => 'Long month name']),
+      5  => t('May', [], ['context' => 'Long month name']),
+      6  => t('June', [], ['context' => 'Long month name']),
+      7  => t('July', [], ['context' => 'Long month name']),
+      8  => t('August', [], ['context' => 'Long month name']),
+      9  => t('September', [], ['context' => 'Long month name']),
+      10 => t('October', [], ['context' => 'Long month name']),
+      11 => t('November', [], ['context' => 'Long month name']),
+      12 => t('December', [], ['context' => 'Long month name']),
+    ];
+    $none = ['' => ''];
     return !$required ? $none + $monthnames : $monthnames;
   }
 
@@ -112,21 +112,21 @@ public static function monthNames($required = FALSE) {
   public static function monthNamesAbbr($required = FALSE) {
     // Force the key to use the correct month value, rather than
     // starting with zero.
-    $monthnames = array(
-      1  => t('Jan', array(), array('context' => 'Abbreviated month name')),
-      2  => t('Feb', array(), array('context' => 'Abbreviated month name')),
-      3  => t('Mar', array(), array('context' => 'Abbreviated month name')),
-      4  => t('Apr', array(), array('context' => 'Abbreviated month name')),
-      5  => t('May', array(), array('context' => 'Abbreviated month name')),
-      6  => t('Jun', array(), array('context' => 'Abbreviated month name')),
-      7  => t('Jul', array(), array('context' => 'Abbreviated month name')),
-      8  => t('Aug', array(), array('context' => 'Abbreviated month name')),
-      9  => t('Sep', array(), array('context' => 'Abbreviated month name')),
-      10 => t('Oct', array(), array('context' => 'Abbreviated month name')),
-      11 => t('Nov', array(), array('context' => 'Abbreviated month name')),
-      12 => t('Dec', array(), array('context' => 'Abbreviated month name')),
-    );
-    $none = array('' => '');
+    $monthnames = [
+      1  => t('Jan', [], ['context' => 'Abbreviated month name']),
+      2  => t('Feb', [], ['context' => 'Abbreviated month name']),
+      3  => t('Mar', [], ['context' => 'Abbreviated month name']),
+      4  => t('Apr', [], ['context' => 'Abbreviated month name']),
+      5  => t('May', [], ['context' => 'Abbreviated month name']),
+      6  => t('Jun', [], ['context' => 'Abbreviated month name']),
+      7  => t('Jul', [], ['context' => 'Abbreviated month name']),
+      8  => t('Aug', [], ['context' => 'Abbreviated month name']),
+      9  => t('Sep', [], ['context' => 'Abbreviated month name']),
+      10 => t('Oct', [], ['context' => 'Abbreviated month name']),
+      11 => t('Nov', [], ['context' => 'Abbreviated month name']),
+      12 => t('Dec', [], ['context' => 'Abbreviated month name']),
+    ];
+    $none = ['' => ''];
     return !$required ? $none + $monthnames : $monthnames;
   }
 
@@ -137,7 +137,7 @@ public static function monthNamesAbbr($required = FALSE) {
    *   An array of week day names
    */
   public static function weekDaysUntranslated() {
-    return array(
+    return [
       'Sunday',
       'Monday',
       'Tuesday',
@@ -145,7 +145,7 @@ public static function weekDaysUntranslated() {
       'Thursday',
       'Friday',
       'Saturday',
-    );
+    ];
   }
 
   /**
@@ -159,7 +159,7 @@ public static function weekDaysUntranslated() {
    *   An array of week day names
    */
   public static function weekDays($required = FALSE) {
-    $weekdays = array(
+    $weekdays = [
       t('Sunday'),
       t('Monday'),
       t('Tuesday'),
@@ -167,8 +167,8 @@ public static function weekDays($required = FALSE) {
       t('Thursday'),
       t('Friday'),
       t('Saturday'),
-    );
-    $none = array('' => '');
+    ];
+    $none = ['' => ''];
     return !$required ? $none + $weekdays : $weekdays;
   }
 
@@ -183,16 +183,16 @@ public static function weekDays($required = FALSE) {
    *   An array of week day abbreviations
    */
   public static function weekDaysAbbr($required = FALSE) {
-    $weekdays = array(
-      t('Sun', array(), array('context' => 'Abbreviated weekday')),
-      t('Mon', array(), array('context' => 'Abbreviated weekday')),
-      t('Tue', array(), array('context' => 'Abbreviated weekday')),
-      t('Wed', array(), array('context' => 'Abbreviated weekday')),
-      t('Thu', array(), array('context' => 'Abbreviated weekday')),
-      t('Fri', array(), array('context' => 'Abbreviated weekday')),
-      t('Sat', array(), array('context' => 'Abbreviated weekday')),
-    );
-    $none = array('' => '');
+    $weekdays = [
+      t('Sun', [], ['context' => 'Abbreviated weekday']),
+      t('Mon', [], ['context' => 'Abbreviated weekday']),
+      t('Tue', [], ['context' => 'Abbreviated weekday']),
+      t('Wed', [], ['context' => 'Abbreviated weekday']),
+      t('Thu', [], ['context' => 'Abbreviated weekday']),
+      t('Fri', [], ['context' => 'Abbreviated weekday']),
+      t('Sat', [], ['context' => 'Abbreviated weekday']),
+    ];
+    $none = ['' => ''];
     return !$required ? $none + $weekdays : $weekdays;
   }
 
@@ -207,16 +207,16 @@ public static function weekDaysAbbr($required = FALSE) {
    *   An array of week day 2 letter abbreviations
    */
   public static function weekDaysAbbr2($required = FALSE) {
-    $weekdays = array(
-      t('Su', array(), array('context' => 'Abbreviated weekday')),
-      t('Mo', array(), array('context' => 'Abbreviated weekday')),
-      t('Tu', array(), array('context' => 'Abbreviated weekday')),
-      t('We', array(), array('context' => 'Abbreviated weekday')),
-      t('Th', array(), array('context' => 'Abbreviated weekday')),
-      t('Fr', array(), array('context' => 'Abbreviated weekday')),
-      t('Sa', array(), array('context' => 'Abbreviated weekday')),
-    );
-    $none = array('' => '');
+    $weekdays = [
+      t('Su', [], ['context' => 'Abbreviated weekday']),
+      t('Mo', [], ['context' => 'Abbreviated weekday']),
+      t('Tu', [], ['context' => 'Abbreviated weekday']),
+      t('We', [], ['context' => 'Abbreviated weekday']),
+      t('Th', [], ['context' => 'Abbreviated weekday']),
+      t('Fr', [], ['context' => 'Abbreviated weekday']),
+      t('Sa', [], ['context' => 'Abbreviated weekday']),
+    ];
+    $none = ['' => ''];
     return !$required ? $none + $weekdays : $weekdays;
   }
 
@@ -231,16 +231,16 @@ public static function weekDaysAbbr2($required = FALSE) {
    *   An array of week day 1 letter abbreviations
    */
   public static function weekDaysAbbr1($required = FALSE) {
-    $weekdays = array(
-      t('S', array(), array('context' => 'Abbreviated 1 letter weekday Sunday')),
-      t('M', array(), array('context' => 'Abbreviated 1 letter weekday Monday')),
-      t('T', array(), array('context' => 'Abbreviated 1 letter weekday Tuesday')),
-      t('W', array(), array('context' => 'Abbreviated 1 letter weekday Wednesday')),
-      t('T', array(), array('context' => 'Abbreviated 1 letter weekday Thursday')),
-      t('F', array(), array('context' => 'Abbreviated 1 letter weekday Friday')),
-      t('S', array(), array('context' => 'Abbreviated 1 letter weekday Saturday')),
-    );
-    $none = array('' => '');
+    $weekdays = [
+      t('S', [], ['context' => 'Abbreviated 1 letter weekday Sunday']),
+      t('M', [], ['context' => 'Abbreviated 1 letter weekday Monday']),
+      t('T', [], ['context' => 'Abbreviated 1 letter weekday Tuesday']),
+      t('W', [], ['context' => 'Abbreviated 1 letter weekday Wednesday']),
+      t('T', [], ['context' => 'Abbreviated 1 letter weekday Thursday']),
+      t('F', [], ['context' => 'Abbreviated 1 letter weekday Friday']),
+      t('S', [], ['context' => 'Abbreviated 1 letter weekday Saturday']),
+    ];
+    $none = ['' => ''];
     return !$required ? $none + $weekdays : $weekdays;
   }
 
@@ -296,7 +296,7 @@ public static function years($min = 0, $max = 0, $required = FALSE) {
     if (empty($max)) {
       $max = intval(date('Y', REQUEST_TIME) + 3);
     }
-    $none = array('' => '');
+    $none = ['' => ''];
     $range = range($min, $max);
     $range = array_combine($range, $range);
     return !$required ? $none + $range : $range;
@@ -328,7 +328,7 @@ public static function days($required = FALSE, $month = NULL, $year = NULL) {
     if (empty($max)) {
       $max = 31;
     }
-    $none = array('' => '');
+    $none = ['' => ''];
     $range = range(1, $max);
     $range = array_combine($range, $range);
     return !$required ? $none + $range : $range;
@@ -349,7 +349,7 @@ public static function days($required = FALSE, $month = NULL, $year = NULL) {
    *   An array of hours in the selected format.
    */
   public static function hours($format = 'H', $required = FALSE) {
-    $hours = array();
+    $hours = [];
     if ($format == 'h' || $format == 'g') {
       $min = 1;
       $max = 12;
@@ -362,7 +362,7 @@ public static function hours($format = 'H', $required = FALSE) {
       $formatted = ($format == 'H' || $format == 'h') ? DrupalDateTime::datePad($i) : $i;
       $hours[$i] = $formatted;
     }
-    $none = array('' => '');
+    $none = ['' => ''];
     return !$required ? $none + $hours : $hours;
   }
 
@@ -382,7 +382,7 @@ public static function hours($format = 'H', $required = FALSE) {
    *   An array of minutes in the selected format.
    */
   public static function minutes($format = 'i', $required = FALSE, $increment = 1) {
-    $minutes = array();
+    $minutes = [];
     // Ensure $increment has a value so we don't loop endlessly.
     if (empty($increment)) {
       $increment = 1;
@@ -391,7 +391,7 @@ public static function minutes($format = 'i', $required = FALSE, $increment = 1)
       $formatted = $format == 'i' ? DrupalDateTime::datePad($i) : $i;
       $minutes[$i] = $formatted;
     }
-    $none = array('' => '');
+    $none = ['' => ''];
     return !$required ? $none + $minutes : $minutes;
   }
 
@@ -411,7 +411,7 @@ public static function minutes($format = 'i', $required = FALSE, $increment = 1)
    *   An array of seconds in the selected format.
    */
   public static function seconds($format = 's', $required = FALSE, $increment = 1) {
-    $seconds = array();
+    $seconds = [];
     // Ensure $increment has a value so we don't loop endlessly.
     if (empty($increment)) {
       $increment = 1;
@@ -420,7 +420,7 @@ public static function seconds($format = 's', $required = FALSE, $increment = 1)
       $formatted = $format == 's' ? DrupalDateTime::datePad($i) : $i;
       $seconds[$i] = $formatted;
     }
-    $none = array('' => '');
+    $none = ['' => ''];
     return !$required ? $none + $seconds : $seconds;
   }
 
@@ -435,11 +435,11 @@ public static function seconds($format = 's', $required = FALSE, $increment = 1)
    *   An array of AM and PM options.
    */
   public static function ampm($required = FALSE) {
-    $none = array('' => '');
-    $ampm = array(
-             'am' => t('am', array(), array('context' => 'ampm')),
-             'pm' => t('pm', array(), array('context' => 'ampm')),
-            );
+    $none = ['' => ''];
+    $ampm = [
+             'am' => t('am', [], ['context' => 'ampm']),
+             'pm' => t('pm', [], ['context' => 'ampm']),
+            ];
     return !$required ? $none + $ampm : $ampm;
   }
 
diff --git a/core/lib/Drupal/Core/Datetime/DrupalDateTime.php b/core/lib/Drupal/Core/Datetime/DrupalDateTime.php
index faa0d022330f1b8bb4b7945afd1871432c899483..572a6e3c6620910781b18fcbf02423d0e05ed2df 100644
--- a/core/lib/Drupal/Core/Datetime/DrupalDateTime.php
+++ b/core/lib/Drupal/Core/Datetime/DrupalDateTime.php
@@ -48,7 +48,7 @@ class DrupalDateTime extends DateTimePlus {
    *   - debug: (optional) Boolean choice to leave debug values in the
    *     date object for debugging purposes. Defaults to FALSE.
    */
-  public function __construct($time = 'now', $timezone = NULL, $settings = array()) {
+  public function __construct($time = 'now', $timezone = NULL, $settings = []) {
     if (!isset($settings['langcode'])) {
       $settings['langcode'] = \Drupal::languageManager()->getCurrentLanguage()->getId();
     }
@@ -87,7 +87,7 @@ protected function prepareTimezone($timezone) {
    *   The formatted value of the date. Since the format may contain user input,
    *   this value should be escaped when output.
    */
-  public function format($format, $settings = array()) {
+  public function format($format, $settings = []) {
     $langcode = !empty($settings['langcode']) ? $settings['langcode'] : $this->langcode;
     $value = '';
     // Format the date and catch errors.
@@ -98,7 +98,7 @@ public function format($format, $settings = array()) {
       // Paired backslashes are isolated to prevent errors in
       // read-ahead evaluation. The read-ahead expression ensures that
       // A matches, but not \A.
-      $format = preg_replace(array('/\\\\\\\\/', '/(?<!\\\\)([AaeDlMTF])/'), array("\xEF\\\\\\\\\xFF", "\xEF\\\\\$1\$1\xFF"), $format);
+      $format = preg_replace(['/\\\\\\\\/', '/(?<!\\\\)([AaeDlMTF])/'], ["\xEF\\\\\\\\\xFF", "\xEF\\\\\$1\$1\xFF"], $format);
 
       // Call date_format().
       $format = parent::format($format, $settings);
@@ -108,7 +108,7 @@ public function format($format, $settings = array()) {
         $code = $matches[1];
         $string = $matches[2];
         if (!isset($this->formatTranslationCache[$langcode][$code][$string])) {
-          $options = array('langcode' => $langcode);
+          $options = ['langcode' => $langcode];
           if ($code == 'F') {
             $options['context'] = 'Long month name';
           }
@@ -117,7 +117,7 @@ public function format($format, $settings = array()) {
             $this->formatTranslationCache[$langcode][$code][$string] = $string;
           }
           else {
-            $this->formatTranslationCache[$langcode][$code][$string] = $this->t($string, array(), $options);
+            $this->formatTranslationCache[$langcode][$code][$string] = $this->t($string, [], $options);
           }
         }
         return $this->formatTranslationCache[$langcode][$code][$string];
diff --git a/core/lib/Drupal/Core/Datetime/Element/DateElementBase.php b/core/lib/Drupal/Core/Datetime/Element/DateElementBase.php
index 12ab03ba3f668481ac3d01346771b29c518f5c2f..63b9abb871b1a808aef4f6b5ee490facc190fee7 100644
--- a/core/lib/Drupal/Core/Datetime/Element/DateElementBase.php
+++ b/core/lib/Drupal/Core/Datetime/Element/DateElementBase.php
@@ -66,7 +66,7 @@ protected static function datetimeRangeYears($string, $date = NULL) {
       $min_year = min($value_year, $min_year);
       $max_year = max($value_year, $max_year);
     }
-    return array($min_year, $max_year);
+    return [$min_year, $max_year];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Datetime/Element/Datelist.php b/core/lib/Drupal/Core/Datetime/Element/Datelist.php
index f39d0a2904761b5cb7c6bbb2d760ae8fe4c20f27..59177e77e9b95e2ccd2abe30d32439ecc92339e2 100644
--- a/core/lib/Drupal/Core/Datetime/Element/Datelist.php
+++ b/core/lib/Drupal/Core/Datetime/Element/Datelist.php
@@ -19,22 +19,22 @@ class Datelist extends DateElementBase {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
-      '#element_validate' => array(
-        array($class, 'validateDatelist'),
-      ),
-      '#process' => array(
-        array($class, 'processDatelist'),
-      ),
+      '#element_validate' => [
+        [$class, 'validateDatelist'],
+      ],
+      '#process' => [
+        [$class, 'processDatelist'],
+      ],
       '#theme' => 'datetime_form',
-      '#theme_wrappers' => array('datetime_wrapper'),
-      '#date_part_order' => array('year', 'month', 'day', 'hour', 'minute'),
+      '#theme_wrappers' => ['datetime_wrapper'],
+      '#date_part_order' => ['year', 'month', 'day', 'hour', 'minute'],
       '#date_year_range' => '1900:2050',
       '#date_increment' => 1,
-      '#date_date_callbacks' => array(),
+      '#date_date_callbacks' => [],
       '#date_timezone' => '',
-    );
+    ];
   }
 
   /**
@@ -197,8 +197,8 @@ public static function processDatelist(&$element, FormStateInterface $form_state
     $element['#tree'] = TRUE;
 
     // Determine the order of the date elements.
-    $order = !empty($element['#date_part_order']) ? $element['#date_part_order'] : array('year', 'month', 'day');
-    $text_parts = !empty($element['#date_text_parts']) ? $element['#date_text_parts'] : array();
+    $order = !empty($element['#date_part_order']) ? $element['#date_part_order'] : ['year', 'month', 'day'];
+    $text_parts = !empty($element['#date_text_parts']) ? $element['#date_text_parts'] : [];
 
     // Output multi-selector for date.
     foreach ($order as $part) {
@@ -248,7 +248,7 @@ public static function processDatelist(&$element, FormStateInterface $form_state
 
         default:
           $format = '';
-          $options = array();
+          $options = [];
           $title = '';
       }
 
@@ -259,7 +259,7 @@ public static function processDatelist(&$element, FormStateInterface $form_state
       }
 
       $element['#attributes']['title'] = $title;
-      $element[$part] = array(
+      $element[$part] = [
         '#type' => in_array($part, $text_parts) ? 'textfield' : 'select',
         '#title' => $title,
         '#title_display' => 'invisible',
@@ -269,7 +269,7 @@ public static function processDatelist(&$element, FormStateInterface $form_state
         '#required' => $element['#required'],
         '#error_no_message' => FALSE,
         '#empty_option' => $title,
-      );
+      ];
     }
 
     // Allows custom callbacks to alter the element.
@@ -315,7 +315,7 @@ public static function validateDatelist(&$element, FormStateInterface $form_stat
       }
       elseif (!empty($all_empty)) {
         foreach ($all_empty as $value) {
-          $form_state->setError($element[$value], t('A value must be selected for %part.', array('%part' => $value)));
+          $form_state->setError($element[$value], t('A value must be selected for %part.', ['%part' => $value]));
         }
       }
       else {
@@ -326,7 +326,7 @@ public static function validateDatelist(&$element, FormStateInterface $form_stat
         }
         // If the input is invalid and an error doesn't exist, set one.
         elseif ($form_state->getError($element) === NULL) {
-          $form_state->setError($element, t('The %field date is invalid.', array('%field' => !empty($element['#title']) ? $element['#title'] : '')));
+          $form_state->setError($element, t('The %field date is invalid.', ['%field' => !empty($element['#title']) ? $element['#title'] : '']));
         }
       }
     }
diff --git a/core/lib/Drupal/Core/Datetime/Element/Datetime.php b/core/lib/Drupal/Core/Datetime/Element/Datetime.php
index 44a39490700c647d64f349ec57091aa5d1accb27..d00547535b1fa21c3bfff81fd6ca0114902f6be4 100644
--- a/core/lib/Drupal/Core/Datetime/Element/Datetime.php
+++ b/core/lib/Drupal/Core/Datetime/Element/Datetime.php
@@ -38,30 +38,30 @@ public function getInfo() {
     }
 
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
-      '#element_validate' => array(
-        array($class, 'validateDatetime'),
-      ),
-      '#process' => array(
-        array($class, 'processDatetime'),
-        array($class, 'processGroup'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderGroup'),
-      ),
+      '#element_validate' => [
+        [$class, 'validateDatetime'],
+      ],
+      '#process' => [
+        [$class, 'processDatetime'],
+        [$class, 'processGroup'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderGroup'],
+      ],
       '#theme' => 'datetime_form',
-      '#theme_wrappers' => array('datetime_wrapper'),
+      '#theme_wrappers' => ['datetime_wrapper'],
       '#date_date_format' => $date_format,
       '#date_date_element' => 'date',
-      '#date_date_callbacks' => array(),
+      '#date_date_callbacks' => [],
       '#date_time_format' => $time_format,
       '#date_time_element' => 'time',
-      '#date_time_callbacks' => array(),
+      '#date_time_callbacks' => [],
       '#date_year_range' => '1900:2050',
       '#date_increment' => 1,
       '#date_timezone' => '',
-    );
+    ];
   }
 
   /**
@@ -88,27 +88,27 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
       catch (\Exception $e) {
         $date = NULL;
       }
-      $input = array(
+      $input = [
         'date'   => $date_input,
         'time'   => $time_input,
         'object' => $date,
-      );
+      ];
     }
     else {
       $date = $element['#default_value'];
       if ($date instanceof DrupalDateTime && !$date->hasErrors()) {
-        $input = array(
+        $input = [
           'date'   => $date->format($element['#date_date_format']),
           'time'   => $date->format($element['#date_time_format']),
           'object' => $date,
-        );
+        ];
       }
       else {
-        $input = array(
+        $input = [
           'date'   => '',
           'time'   => '',
           'object' => NULL,
-        );
+        ];
       }
     }
     return $input;
@@ -213,7 +213,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
    *   The form element whose value has been processed.
    */
   public static function processDatetime(&$element, FormStateInterface $form_state, &$complete_form) {
-    $format_settings = array();
+    $format_settings = [];
     // The value callback has populated the #value array.
     $date = !empty($element['#value']['object']) ? $element['#value']['object'] : NULL;
 
@@ -235,10 +235,10 @@ public static function processDatetime(&$element, FormStateInterface $form_state
       // Creating format examples on every individual date item is messy, and
       // placeholders are invalid for HTML5 date and datetime, so an example
       // format is appended to the title to appear in tooltips.
-      $extra_attributes = array(
-        'title' => t('Date (e.g. @format)', array('@format' => static::formatExample($date_format))),
+      $extra_attributes = [
+        'title' => t('Date (e.g. @format)', ['@format' => static::formatExample($date_format)]),
         'type' => $element['#date_date_element'],
-      );
+      ];
 
       // Adds the HTML5 date attributes.
       if ($date instanceof DrupalDateTime && !$date->hasErrors()) {
@@ -248,13 +248,13 @@ public static function processDatetime(&$element, FormStateInterface $form_state
         $html5_max = clone($date);
         $html5_max->setDate($range[1], 12, 31)->setTime(23, 59, 59);
 
-        $extra_attributes += array(
+        $extra_attributes += [
           'min' => $html5_min->format($date_format, $format_settings),
           'max' => $html5_max->format($date_format, $format_settings),
-        );
+        ];
       }
 
-      $element['date'] = array(
+      $element['date'] = [
         '#type' => 'date',
         '#title' => t('Date'),
         '#title_display' => 'invisible',
@@ -264,7 +264,7 @@ public static function processDatetime(&$element, FormStateInterface $form_state
         '#size' => max(12, strlen($element['#value']['date'])),
         '#error_no_message' => TRUE,
         '#date_date_format' => $element['#date_date_format'],
-      );
+      ];
 
       // Allows custom callbacks to alter the element.
       if (!empty($element['#date_date_callbacks'])) {
@@ -282,12 +282,12 @@ public static function processDatetime(&$element, FormStateInterface $form_state
       $time_value = !empty($date) ? $date->format($time_format, $format_settings) : $element['#value']['time'];
 
       // Adds the HTML5 attributes.
-      $extra_attributes = array(
-        'title' => t('Time (e.g. @format)', array('@format' => static::formatExample($time_format))),
+      $extra_attributes = [
+        'title' => t('Time (e.g. @format)', ['@format' => static::formatExample($time_format)]),
         'type' => $element['#date_time_element'],
         'step' => $element['#date_increment'],
-      );
-      $element['time'] = array(
+      ];
+      $element['time'] = [
         '#type' => 'date',
         '#title' => t('Time'),
         '#title_display' => 'invisible',
@@ -296,7 +296,7 @@ public static function processDatetime(&$element, FormStateInterface $form_state
         '#required' => $element['#required'],
         '#size' => 12,
         '#error_no_message' => TRUE,
-      );
+      ];
 
       // Allows custom callbacks to alter the element.
       if (!empty($element['#date_time_callbacks'])) {
@@ -343,7 +343,7 @@ public static function validateDatetime(&$element, FormStateInterface $form_stat
       // If there's empty input and the field is required, set an error. A
       // reminder of the required format in the message provides a good UX.
       elseif (empty($input['date']) && empty($input['time']) && $element['#required']) {
-        $form_state->setError($element, t('The %field date is required. Please enter a date in the format %format.', array('%field' => $title, '%format' => static::formatExample($format))));
+        $form_state->setError($element, t('The %field date is required. Please enter a date in the format %format.', ['%field' => $title, '%format' => static::formatExample($format)]));
       }
       else {
         // If the date is valid, set it.
@@ -354,7 +354,7 @@ public static function validateDatetime(&$element, FormStateInterface $form_stat
         // If the date is invalid, set an error. A reminder of the required
         // format in the message provides a good UX.
         else {
-          $form_state->setError($element, t('The %field date is invalid. Please enter a date in the format %format.', array('%field' => $title, '%format' => static::formatExample($format))));
+          $form_state->setError($element, t('The %field date is invalid. Please enter a date in the format %format.', ['%field' => $title, '%format' => static::formatExample($format)]));
         }
       }
     }
diff --git a/core/lib/Drupal/Core/Datetime/Plugin/Field/FieldWidget/TimestampDatetimeWidget.php b/core/lib/Drupal/Core/Datetime/Plugin/Field/FieldWidget/TimestampDatetimeWidget.php
index d11cf54eb532fdfeee0b6218a00a7c071bc5a090..1ffa0109164a5c76e1afda03139ad2714d781f70 100644
--- a/core/lib/Drupal/Core/Datetime/Plugin/Field/FieldWidget/TimestampDatetimeWidget.php
+++ b/core/lib/Drupal/Core/Datetime/Plugin/Field/FieldWidget/TimestampDatetimeWidget.php
@@ -30,12 +30,12 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     $date_format = DateFormat::load('html_date')->getPattern();
     $time_format = DateFormat::load('html_time')->getPattern();
     $default_value = isset($items[$delta]->value) ? DrupalDateTime::createFromTimestamp($items[$delta]->value) : '';
-    $element['value'] = $element + array(
+    $element['value'] = $element + [
       '#type' => 'datetime',
       '#default_value' => $default_value,
       '#date_year_range' => '1902:2037',
-    );
-    $element['value']['#description'] = $this->t('Format: %format. Leave blank to use the time of form submission.', array('%format' => Datetime::formatExample($date_format . ' ' . $time_format)));
+    ];
+    $element['value']['#description'] = $this->t('Format: %format. Leave blank to use the time of form submission.', ['%format' => Datetime::formatExample($date_format . ' ' . $time_format)]);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterAccessChecksPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterAccessChecksPass.php
index 52254a1bd4e860d8ad8a314b8bd2db6a54900c56..f636fb023f33db497790d9624985481da00bf473 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterAccessChecksPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterAccessChecksPass.php
@@ -20,7 +20,7 @@ public function process(ContainerBuilder $container) {
     // Add services tagged 'access_check' to the access_manager service.
     $access_manager = $container->getDefinition('access_manager.check_provider');
     foreach ($container->findTaggedServiceIds('access_check') as $id => $attributes) {
-      $applies = array();
+      $applies = [];
       $method = 'access';
       $needs_incoming_request = FALSE;
       foreach ($attributes as $attribute) {
@@ -34,7 +34,7 @@ public function process(ContainerBuilder $container) {
           $needs_incoming_request = TRUE;
         }
       }
-      $access_manager->addMethodCall('addCheckService', array($id, $method, $applies, $needs_incoming_request));
+      $access_manager->addMethodCall('addCheckService', [$id, $method, $applies, $needs_incoming_request]);
     }
   }
 
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterServicesForDestructionPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterServicesForDestructionPass.php
index a106cfcab741a299f7b9f3f26691a91c014b877d..5e13eea0260b17b797db57491f44d9c76be56247 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterServicesForDestructionPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterServicesForDestructionPass.php
@@ -24,7 +24,7 @@ public function process(ContainerBuilder $container) {
     $definition = $container->getDefinition('kernel_destruct_subscriber');
     $services = $container->findTaggedServiceIds('needs_destruction');
     foreach ($services as $id => $attributes) {
-      $definition->addMethodCall('registerService', array($id));
+      $definition->addMethodCall('registerService', [$id]);
     }
   }
 
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterStreamWrappersPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterStreamWrappersPass.php
index 7abf49f4985e477cf5c6be626b4f8250a4363752..f1ea8cd5b79bb16ad0e3e8ca9811379afe966348 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterStreamWrappersPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterStreamWrappersPass.php
@@ -24,7 +24,7 @@ public function process(ContainerBuilder $container) {
       $class = $container->getDefinition($id)->getClass();
       $scheme = $attributes[0]['scheme'];
 
-      $stream_wrapper_manager->addMethodCall('addStreamWrapper', array($id, $class, $scheme));
+      $stream_wrapper_manager->addMethodCall('addStreamWrapper', [$id, $class, $scheme]);
     }
   }
 
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/TaggedHandlersPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/TaggedHandlersPass.php
index 3386e6af6bd731586e0e52e280a2ad2d0c1f2b12..bb87d5e484235b65b11273d5ecc9ef3b144028e4 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/TaggedHandlersPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/TaggedHandlersPass.php
@@ -108,17 +108,17 @@ public function process(ContainerBuilder $container) {
         // Determine the ID.
 
         if (!isset($interface)) {
-          throw new LogicException(vsprintf("Service consumer '%s' class method %s::%s() has to type-hint an interface.", array(
+          throw new LogicException(vsprintf("Service consumer '%s' class method %s::%s() has to type-hint an interface.", [
             $consumer_id,
             $consumer->getClass(),
             $method_name,
-          )));
+          ]));
         }
         $interface = $interface->getName();
 
         // Find all tagged handlers.
-        $handlers = array();
-        $extra_arguments = array();
+        $handlers = [];
+        $extra_arguments = [];
         foreach ($container->findTaggedServiceIds($tag) as $id => $attributes) {
           // Validate the interface.
           $handler = $container->getDefinition($id);
@@ -143,7 +143,7 @@ public function process(ContainerBuilder $container) {
         // Add a method call for each handler to the consumer service
         // definition.
         foreach ($handlers as $id => $priority) {
-          $arguments = array();
+          $arguments = [];
           $arguments[$interface_pos] = new Reference($id);
           if (isset($priority_pos)) {
             $arguments[$priority_pos] = $priority;
diff --git a/core/lib/Drupal/Core/DependencyInjection/DependencySerializationTrait.php b/core/lib/Drupal/Core/DependencyInjection/DependencySerializationTrait.php
index ed2b35fb7dd044c0fec20b2494559ede84964931..7f3cb5d6f98c29a16cede65edb5668e7ec636436 100644
--- a/core/lib/Drupal/Core/DependencyInjection/DependencySerializationTrait.php
+++ b/core/lib/Drupal/Core/DependencyInjection/DependencySerializationTrait.php
@@ -14,13 +14,13 @@ trait DependencySerializationTrait {
    *
    * @var array
    */
-  protected $_serviceIds = array();
+  protected $_serviceIds = [];
 
   /**
    * {@inheritdoc}
    */
   public function __sleep() {
-    $this->_serviceIds = array();
+    $this->_serviceIds = [];
     $vars = get_object_vars($this);
     foreach ($vars as $key => $value) {
       if (is_object($value) && isset($value->_serviceId)) {
@@ -52,7 +52,7 @@ public function __wakeup() {
     foreach ($this->_serviceIds as $key => $service_id) {
       $this->$key = $container->get($service_id);
     }
-    $this->_serviceIds = array();
+    $this->_serviceIds = [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Diff/DiffFormatter.php b/core/lib/Drupal/Core/Diff/DiffFormatter.php
index 8ebe2f4793db534ba2c010f4beabbac125b9ced2..a613711f59ede8133da79dbf06d9d9d6c989a5b7 100644
--- a/core/lib/Drupal/Core/Diff/DiffFormatter.php
+++ b/core/lib/Drupal/Core/Diff/DiffFormatter.php
@@ -17,7 +17,7 @@ class DiffFormatter extends DiffFormatterBase {
    *
    * @var array
    */
-  protected $rows = array();
+  protected $rows = [];
 
   /**
    * Creates a DiffFormatter to render diffs in a table.
@@ -35,7 +35,7 @@ public function __construct(ConfigFactoryInterface $config_factory) {
    * {@inheritdoc}
    */
   protected function _start_diff() {
-    $this->rows = array();
+    $this->rows = [];
   }
 
   /**
@@ -49,16 +49,16 @@ protected function _end_diff() {
    * {@inheritdoc}
    */
   protected function _block_header($xbeg, $xlen, $ybeg, $ylen) {
-    return array(
-      array(
+    return [
+      [
         'data' => $xbeg + $this->line_stats['offset']['x'],
         'colspan' => 2,
-      ),
-      array(
+      ],
+      [
         'data' => $ybeg + $this->line_stats['offset']['y'],
         'colspan' => 2,
-      )
-    );
+      ]
+    ];
   }
 
   /**
@@ -86,16 +86,16 @@ protected function _lines($lines, $prefix=' ', $color='white') {
    *   An array representing a table row.
    */
   protected function addedLine($line) {
-    return array(
-      array(
+    return [
+      [
         'data' => '+',
         'class' => 'diff-marker',
-      ),
-      array(
+      ],
+      [
         'data' => ['#markup' => $line],
         'class' => 'diff-context diff-addedline',
-      )
-    );
+      ]
+    ];
   }
 
   /**
@@ -108,16 +108,16 @@ protected function addedLine($line) {
    *   An array representing a table row.
    */
   protected function deletedLine($line) {
-    return array(
-      array(
+    return [
+      [
         'data' => '-',
         'class' => 'diff-marker',
-      ),
-      array(
+      ],
+      [
         'data' => ['#markup' => $line],
         'class' => 'diff-context diff-deletedline',
-      )
-    );
+      ]
+    ];
   }
 
   /**
@@ -130,13 +130,13 @@ protected function deletedLine($line) {
    *   An array representing a table row.
    */
   protected function contextLine($line) {
-    return array(
+    return [
       ' ',
-      array(
+      [
         'data' => ['#markup' => $line],
         'class' => 'diff-context',
-      )
-    );
+      ]
+    ];
   }
 
   /**
@@ -146,10 +146,10 @@ protected function contextLine($line) {
    *   An array representing a table row.
    */
   protected function emptyLine() {
-    return array(
+    return [
       ' ',
       ' ',
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Display/VariantBase.php b/core/lib/Drupal/Core/Display/VariantBase.php
index 5110d209bd11abba70f8901466c352387350b670..4f7ce9e9ffc4eaa008d4c1c2eba9a52c920093d2 100644
--- a/core/lib/Drupal/Core/Display/VariantBase.php
+++ b/core/lib/Drupal/Core/Display/VariantBase.php
@@ -69,9 +69,9 @@ public function setWeight($weight) {
    * {@inheritdoc}
    */
   public function getConfiguration() {
-    return array(
+    return [
       'id' => $this->getPluginId(),
-    ) + $this->configuration;
+    ] + $this->configuration;
   }
 
   /**
@@ -86,11 +86,11 @@ public function setConfiguration(array $configuration) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'label' => '',
       'uuid' => '',
       'weight' => 0,
-    );
+    ];
   }
 
   /**
@@ -104,13 +104,13 @@ public function calculateDependencies() {
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label'),
       '#description' => $this->t('The label for this display variant.'),
       '#default_value' => $this->label(),
       '#maxlength' => '255',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/lib/Drupal/Core/DrupalKernel.php b/core/lib/Drupal/Core/DrupalKernel.php
index b8130b30bb725d39cecc02e67fb044bfee96a331..db773ed2832cd35695dca2c44aecfe11322c0c77 100644
--- a/core/lib/Drupal/Core/DrupalKernel.php
+++ b/core/lib/Drupal/Core/DrupalKernel.php
@@ -142,7 +142,7 @@ class DrupalKernel implements DrupalKernelInterface, TerminableInterface {
    *
    * @var \Drupal\Core\Extension\Extension[]
    */
-  protected $moduleData = array();
+  protected $moduleData = [];
 
   /**
    * The class loader object.
@@ -387,7 +387,7 @@ public static function findSitePath(Request $request, $require_settings = TRUE,
     }
     $http_host = $request->getHttpHost();
 
-    $sites = array();
+    $sites = [];
     include $app_root . '/sites/sites.php';
 
     $uri = explode('/', $script_name);
@@ -480,7 +480,7 @@ public function shutdown() {
     $this->booted = FALSE;
     $this->container = NULL;
     $this->moduleList = NULL;
-    $this->moduleData = array();
+    $this->moduleData = [];
   }
 
   /**
@@ -569,21 +569,21 @@ public function preHandle(Request $request) {
    * {@inheritdoc}
    */
   public function discoverServiceProviders() {
-    $this->serviceYamls = array(
-      'app' => array(),
-      'site' => array(),
-    );
-    $this->serviceProviderClasses = array(
-      'app' => array(),
-      'site' => array(),
-    );
+    $this->serviceYamls = [
+      'app' => [],
+      'site' => [],
+    ];
+    $this->serviceProviderClasses = [
+      'app' => [],
+      'site' => [],
+    ];
     $this->serviceYamls['app']['core'] = 'core/core.services.yml';
     $this->serviceProviderClasses['app']['core'] = 'Drupal\Core\CoreServiceProvider';
 
     // Retrieve enabled modules and register their namespaces.
     if (!isset($this->moduleList)) {
       $extensions = $this->getConfigStorage()->read('core.extension');
-      $this->moduleList = isset($extensions['module']) ? $extensions['module'] : array();
+      $this->moduleList = isset($extensions['module']) ? $extensions['module'] : [];
     }
     $module_filenames = $this->getModuleFileNames();
     $this->classLoaderAddMultiplePsr4($this->getModuleNamespacesPsr4($module_filenames));
@@ -732,7 +732,7 @@ protected function moduleData($module) {
     if (!$this->moduleData) {
       // First, find profiles.
       $listing = new ExtensionDiscovery($this->root);
-      $listing->setProfileDirectories(array());
+      $listing->setProfileDirectories([]);
       $all_profiles = $listing->scan('profile');
       $profiles = array_intersect_key($all_profiles, $this->moduleList);
 
@@ -743,7 +743,7 @@ protected function moduleData($module) {
       if ($parent_profile && !isset($profiles[$parent_profile])) {
         // In case both profile directories contain the same extension, the
         // actual profile always has precedence.
-        $profiles = array($parent_profile => $all_profiles[$parent_profile]) + $profiles;
+        $profiles = [$parent_profile => $all_profiles[$parent_profile]] + $profiles;
       }
 
       $profile_directories = array_map(function ($profile) {
@@ -763,7 +763,7 @@ protected function moduleData($module) {
    * @todo Remove obsolete $module_list parameter. Only $module_filenames is
    *   needed.
    */
-  public function updateModules(array $module_list, array $module_filenames = array()) {
+  public function updateModules(array $module_list, array $module_filenames = []) {
     $pre_existing_module_namespaces = [];
     if ($this->booted && is_array($this->moduleList)) {
       $pre_existing_module_namespaces = $this->getModuleNamespacesPsr4($this->getModuleFileNames());
@@ -814,7 +814,7 @@ public function updateModules(array $module_list, array $module_filenames = arra
    *   The cache key used for the service container.
    */
   protected function getContainerCacheKey() {
-    $parts = array('service_container', $this->environment, \Drupal::VERSION, Settings::get('deployment_identifier'), PHP_OS, serialize(Settings::get('container_yamls')));
+    $parts = ['service_container', $this->environment, \Drupal::VERSION, Settings::get('deployment_identifier'), PHP_OS, serialize(Settings::get('container_yamls'))];
     return implode(':', $parts);
   }
 
@@ -824,9 +824,9 @@ protected function getContainerCacheKey() {
    * @return array An array of kernel parameters
    */
   protected function getKernelParameters() {
-    return array(
+    return [
       'kernel.environment' => $this->environment,
-    );
+    ];
   }
 
   /**
@@ -1023,7 +1023,7 @@ protected function initializeSettings(Request $request) {
 
     // Initialize our list of trusted HTTP Host headers to protect against
     // header attacks.
-    $host_patterns = Settings::get('trusted_host_patterns', array());
+    $host_patterns = Settings::get('trusted_host_patterns', []);
     if (PHP_SAPI !== 'cli' && !empty($host_patterns)) {
       if (static::setupTrustedHosts($request, $host_patterns) === FALSE) {
         throw new BadRequestHttpException('The provided host name is not valid for this server.');
@@ -1109,7 +1109,7 @@ protected function initializeRequestGlobals(Request $request) {
    * Returns service instances to persist from an old container to a new one.
    */
   protected function getServicesToPersist(ContainerInterface $container) {
-    $persist = array();
+    $persist = [];
     foreach ($container->getParameter('persist_ids') as $id) {
       // It's pointless to persist services not yet initialized.
       if ($container->initialized($id)) {
@@ -1138,7 +1138,7 @@ protected function persistServices(ContainerInterface $container, array $persist
   public function rebuildContainer() {
     // Empty module properties and for them to be reloaded from scratch.
     $this->moduleList = NULL;
-    $this->moduleData = array();
+    $this->moduleData = [];
     $this->containerNeedsRebuild = TRUE;
     return $this->initializeContainer();
   }
@@ -1170,7 +1170,7 @@ public function invalidateContainer() {
    * @return ContainerInterface
    */
   protected function attachSynthetic(ContainerInterface $container) {
-    $persist = array();
+    $persist = [];
     if (isset($this->container)) {
       $persist = $this->getServicesToPersist($this->container);
     }
@@ -1213,7 +1213,7 @@ protected function compileContainer() {
     // - Element
     // - Entity
     // - Plugin
-    foreach (array('Core', 'Component') as $parent_directory) {
+    foreach (['Core', 'Component'] as $parent_directory) {
       $path = 'core/lib/Drupal/' . $parent_directory;
       $parent_namespace = 'Drupal\\' . $parent_directory;
       foreach (new \DirectoryIterator($this->root . '/' . $path) as $component) {
@@ -1238,7 +1238,7 @@ protected function compileContainer() {
     $default_language_values = Language::$defaultValues;
     if ($system = $this->getConfigStorage()->read('system.site')) {
       if ($default_language_values['id'] != $system['langcode']) {
-        $default_language_values = array('id' => $system['langcode']);
+        $default_language_values = ['id' => $system['langcode']];
       }
     }
     $container->setParameter('language.default_values', $default_language_values);
@@ -1272,7 +1272,7 @@ protected function compileContainer() {
     // the container during the lifetime of the kernel (e.g., during a kernel
     // reboot). Include synthetic services, because by definition, they cannot
     // be automatically reinstantiated. Also include services tagged to persist.
-    $persist_ids = array();
+    $persist_ids = [];
     foreach ($container->getDefinitions() as $id => $definition) {
       // It does not make sense to persist the container itself, exclude it.
       if ($id !== 'service_container' && ($definition->isSynthetic() || $definition->getTag('persist'))) {
@@ -1292,10 +1292,10 @@ protected function compileContainer() {
    */
   protected function initializeServiceProviders() {
     $this->discoverServiceProviders();
-    $this->serviceProviders = array(
-      'app' => array(),
-      'site' => array(),
-    );
+    $this->serviceProviders = [
+      'app' => [],
+      'site' => [],
+    ];
     foreach ($this->serviceProviderClasses as $origin => $classes) {
       foreach ($classes as $name => $class) {
         if (!is_object($class)) {
@@ -1375,14 +1375,14 @@ protected function getConfigStorage() {
    * @return array
    */
   protected function getModulesParameter() {
-    $extensions = array();
+    $extensions = [];
     foreach ($this->moduleList as $name => $weight) {
       if ($data = $this->moduleData($name)) {
-        $extensions[$name] = array(
+        $extensions[$name] = [
           'type' => $data->getType(),
           'pathname' => $data->getPathname(),
           'filename' => $data->getExtensionFilename(),
-        );
+        ];
       }
     }
     return $extensions;
@@ -1396,7 +1396,7 @@ protected function getModulesParameter() {
    *   respective *.info.yml file.
    */
   protected function getModuleFileNames() {
-    $filenames = array();
+    $filenames = [];
     foreach ($this->moduleList as $module => $weight) {
       if ($data = $this->moduleData($module)) {
         $filenames[$module] = $data->getPathname();
@@ -1417,7 +1417,7 @@ protected function getModuleFileNames() {
    *   value is the PSR-4 base directory associated with the module namespace.
    */
   protected function getModuleNamespacesPsr4($module_file_names) {
-    $namespaces = array();
+    $namespaces = [];
     foreach ($module_file_names as $module => $filename) {
       $namespaces["Drupal\\$module"] = dirname($filename) . '/src';
     }
@@ -1436,7 +1436,7 @@ protected function getModuleNamespacesPsr4($module_file_names) {
    *   the front controller, but may also be decorated; e.g.,
    *   \Symfony\Component\ClassLoader\ApcClassLoader.
    */
-  protected function classLoaderAddMultiplePsr4(array $namespaces = array(), $class_loader = NULL) {
+  protected function classLoaderAddMultiplePsr4(array $namespaces = [], $class_loader = NULL) {
     if ($class_loader === NULL) {
       $class_loader = $this->classLoader;
     }
diff --git a/core/lib/Drupal/Core/DrupalKernelInterface.php b/core/lib/Drupal/Core/DrupalKernelInterface.php
index 862fbec59d0f5471c4176c9dc4f7ef142925b36e..c38fff5db938b71caf0a0e6759e6066c9eb22372 100644
--- a/core/lib/Drupal/Core/DrupalKernelInterface.php
+++ b/core/lib/Drupal/Core/DrupalKernelInterface.php
@@ -100,7 +100,7 @@ public function getAppRoot();
    * @param array $module_filenames
    *   List of module filenames, keyed by module name.
    */
-  public function updateModules(array $module_list, array $module_filenames = array());
+  public function updateModules(array $module_list, array $module_filenames = []);
 
   /**
    * Force a container rebuild.
diff --git a/core/lib/Drupal/Core/Entity/Annotation/ConfigEntityType.php b/core/lib/Drupal/Core/Entity/Annotation/ConfigEntityType.php
index b74f21b5f2eabbee639bc4127cc061b970fea682..4e17852990f8946e2473a8042a77faf1b5dcf78c 100644
--- a/core/lib/Drupal/Core/Entity/Annotation/ConfigEntityType.php
+++ b/core/lib/Drupal/Core/Entity/Annotation/ConfigEntityType.php
@@ -31,7 +31,7 @@ class ConfigEntityType extends EntityType {
    * {@inheritdoc}
    */
   public function get() {
-    $this->definition['group_label'] = new TranslatableMarkup('Configuration', array(), array('context' => 'Entity type group'));
+    $this->definition['group_label'] = new TranslatableMarkup('Configuration', [], ['context' => 'Entity type group']);
 
     return parent::get();
   }
diff --git a/core/lib/Drupal/Core/Entity/Annotation/ContentEntityType.php b/core/lib/Drupal/Core/Entity/Annotation/ContentEntityType.php
index 4995d449f5f5329c58fe1bfe70eac116808276b2..0817c930f8181ddcd638587034ae9659481d3f2d 100644
--- a/core/lib/Drupal/Core/Entity/Annotation/ContentEntityType.php
+++ b/core/lib/Drupal/Core/Entity/Annotation/ContentEntityType.php
@@ -32,7 +32,7 @@ class ContentEntityType extends EntityType {
    * {@inheritdoc}
    */
   public function get() {
-    $this->definition['group_label'] = new TranslatableMarkup('Content', array(), array('context' => 'Entity type group'));
+    $this->definition['group_label'] = new TranslatableMarkup('Content', [], ['context' => 'Entity type group']);
 
     return parent::get();
   }
diff --git a/core/lib/Drupal/Core/Entity/Annotation/EntityReferenceSelection.php b/core/lib/Drupal/Core/Entity/Annotation/EntityReferenceSelection.php
index c3949e70901c7fe3d8e901e5be1c41788548cda4..96bc6b127aa60e92303204c6d784335caf54c695 100644
--- a/core/lib/Drupal/Core/Entity/Annotation/EntityReferenceSelection.php
+++ b/core/lib/Drupal/Core/Entity/Annotation/EntityReferenceSelection.php
@@ -60,7 +60,7 @@ class EntityReferenceSelection extends Plugin {
    *
    * @var array (optional)
    */
-  public $entity_types = array();
+  public $entity_types = [];
 
   /**
    * The weight of the plugin in it's group.
diff --git a/core/lib/Drupal/Core/Entity/ContentEntityBase.php b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
index 70ea52094e46325d9acae0b30e4a10915289d445..971e551db46bff709122bb92afacb37ec216ed87 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
@@ -32,14 +32,14 @@ abstract class ContentEntityBase extends Entity implements \IteratorAggregate, C
    *
    * @var array
    */
-  protected $values = array();
+  protected $values = [];
 
   /**
    * The array of fields, each being an instance of FieldItemListInterface.
    *
    * @var array
    */
-  protected $fields = array();
+  protected $fields = [];
 
   /**
    * Local cache for field definitions.
@@ -97,7 +97,7 @@ abstract class ContentEntityBase extends Entity implements \IteratorAggregate, C
    *
    * @var array
    */
-  protected $translations = array();
+  protected $translations = [];
 
   /**
    * A flag indicating whether a translation object is being initialized.
@@ -125,14 +125,14 @@ abstract class ContentEntityBase extends Entity implements \IteratorAggregate, C
    *
    * @var array
    */
-  protected $entityKeys = array();
+  protected $entityKeys = [];
 
   /**
    * Holds translatable entity keys such as the label.
    *
    * @var array
    */
-  protected $translatableEntityKeys = array();
+  protected $translatableEntityKeys = [];
 
   /**
    * Whether entity validation was performed.
@@ -158,7 +158,7 @@ abstract class ContentEntityBase extends Entity implements \IteratorAggregate, C
   /**
    * {@inheritdoc}
    */
-  public function __construct(array $values, $entity_type, $bundle = FALSE, $translations = array()) {
+  public function __construct(array $values, $entity_type, $bundle = FALSE, $translations = []) {
     $this->entityTypeId = $entity_type;
     $this->entityKeys['bundle'] = $bundle ? $bundle : $this->entityTypeId;
     $this->langcodeKey = $this->getEntityType()->getKey('langcode');
@@ -243,7 +243,7 @@ protected function getLanguages() {
       // we return a mock language object to avoid disrupting the consuming
       // code.
       if (!isset($this->languages[$this->defaultLangcode])) {
-        $this->languages[$this->defaultLangcode] = new Language(array('id' => $this->defaultLangcode));
+        $this->languages[$this->defaultLangcode] = new Language(['id' => $this->defaultLangcode]);
       }
     }
     return $this->languages;
@@ -445,7 +445,7 @@ public function __sleep() {
         $this->values[$name][$langcode] = $field->getValue();
       }
     }
-    $this->fields = array();
+    $this->fields = [];
     $this->fieldDefinitions = NULL;
     $this->languages = NULL;
     $this->clearTranslationCache();
@@ -554,7 +554,7 @@ public function set($name, $value, $notify = TRUE) {
    * {@inheritdoc}
    */
   public function getFields($include_computed = TRUE) {
-    $fields = array();
+    $fields = [];
     foreach ($this->getFieldDefinitions() as $name => $definition) {
       if ($include_computed || !$definition->isComputed()) {
         $fields[$name] = $this->get($name);
@@ -609,7 +609,7 @@ public function getFieldDefinitions() {
    * {@inheritdoc}
    */
   public function toArray() {
-    $values = array();
+    $values = [];
     foreach ($this->getFields() as $name => $property) {
       $values[$name] = $property->getValue();
     }
@@ -721,7 +721,7 @@ public function onChange($name) {
           // Update the default internal language cache.
           $this->setDefaultLangcode();
           if (isset($this->translations[$this->defaultLangcode])) {
-            $message = SafeMarkup::format('A translation already exists for the specified language (@langcode).', array('@langcode' => $this->defaultLangcode));
+            $message = SafeMarkup::format('A translation already exists for the specified language (@langcode).', ['@langcode' => $this->defaultLangcode]);
             throw new \InvalidArgumentException($message);
           }
           $this->updateFieldLangcodes($this->defaultLangcode);
@@ -732,7 +732,7 @@ public function onChange($name) {
           $items = $this->get($this->langcodeKey);
           if ($items->value != $this->activeLangcode) {
             $items->setValue($this->activeLangcode, FALSE);
-            $message = SafeMarkup::format('The translation language cannot be changed (@langcode).', array('@langcode' => $this->activeLangcode));
+            $message = SafeMarkup::format('The translation language cannot be changed (@langcode).', ['@langcode' => $this->activeLangcode]);
             throw new \LogicException($message);
           }
         }
@@ -743,7 +743,7 @@ public function onChange($name) {
         //   read-only. See https://www.drupal.org/node/2443991.
         if (isset($this->values[$this->defaultLangcodeKey]) && $this->get($this->defaultLangcodeKey)->value != $this->isDefaultTranslation()) {
           $this->get($this->defaultLangcodeKey)->setValue($this->isDefaultTranslation(), FALSE);
-          $message = SafeMarkup::format('The default translation flag cannot be changed (@langcode).', array('@langcode' => $this->activeLangcode));
+          $message = SafeMarkup::format('The default translation flag cannot be changed (@langcode).', ['@langcode' => $this->activeLangcode]);
           throw new \LogicException($message);
         }
         break;
@@ -853,7 +853,7 @@ public function isNewTranslation() {
   /**
    * {@inheritdoc}
    */
-  public function addTranslation($langcode, array $values = array()) {
+  public function addTranslation($langcode, array $values = []) {
     // Make sure we do not attempt to create a translation if an invalid
     // language is specified or the entity cannot be translated.
     $this->getLanguages();
@@ -1021,7 +1021,7 @@ public function __isset($name) {
   public function __unset($name) {
     // Unsetting a field means emptying it.
     if ($this->hasField($name)) {
-      $this->get($name)->setValue(array());
+      $this->get($name)->setValue([]);
     }
     // For non-field properties, unset the internal value.
     else {
@@ -1107,13 +1107,13 @@ public function __clone() {
     $this->fields = &$fields;
 
     foreach ($this->fields as $name => $values) {
-      $this->fields[$name] = array();
+      $this->fields[$name] = [];
       // Untranslatable fields may have multiple references for the same field
       // object keyed by language. To avoid creating different field objects
       // we retain just the original value, as references will be recreated
       // later as needed.
       if (!$definitions[$name]->isTranslatable() && count($values) > 1) {
-        $values = array_intersect_key($values, array(LanguageInterface::LANGCODE_DEFAULT => TRUE));
+        $values = array_intersect_key($values, [LanguageInterface::LANGCODE_DEFAULT => TRUE]);
       }
       foreach ($values as $langcode => $items) {
         $this->fields[$name][$langcode] = clone $items;
@@ -1141,7 +1141,7 @@ public function label() {
    * {@inheritdoc}
    */
   public function referencedEntities() {
-    $referenced_entities = array();
+    $referenced_entities = [];
 
     // Gather a list of referenced entities.
     foreach ($this->getFields() as $field_items) {
@@ -1260,7 +1260,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
    * {@inheritdoc}
    */
   public static function bundleFieldDefinitions(EntityTypeInterface $entity_type, $bundle, array $base_field_definitions) {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/ContentEntityConfirmFormBase.php b/core/lib/Drupal/Core/Entity/ContentEntityConfirmFormBase.php
index 84d24de73e0402d755349b28df2b2c56d87f2eee..bc0bdf3a27acac2541b70c9f79aa4b23431a21d0 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityConfirmFormBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityConfirmFormBase.php
@@ -55,8 +55,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['#title'] = $this->getQuestion();
 
     $form['#attributes']['class'][] = 'confirmation';
-    $form['description'] = array('#markup' => $this->getDescription());
-    $form[$this->getFormName()] = array('#type' => 'hidden', '#value' => 1);
+    $form['description'] = ['#markup' => $this->getDescription()];
+    $form[$this->getFormName()] = ['#type' => 'hidden', '#value' => 1];
 
     // By default, render the form using theme_confirm_form().
     if (!isset($form['#theme'])) {
@@ -77,16 +77,16 @@ public function form(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   protected function actions(array $form, FormStateInterface $form_state) {
-    return array(
-      'submit' => array(
+    return [
+      'submit' => [
         '#type' => 'submit',
         '#value' => $this->getConfirmText(),
-        '#submit' => array(
-          array($this, 'submitForm'),
-        ),
-      ),
+        '#submit' => [
+          [$this, 'submitForm'],
+        ],
+      ],
       'cancel' => ConfirmFormHelper::buildCancelLink($this, $this->getRequest()),
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/ContentEntityDeleteForm.php b/core/lib/Drupal/Core/Entity/ContentEntityDeleteForm.php
index ac94c26d00e4e68e29b395cdc675edccfe0c3e43..9a70ef5bc78ccfae3f8aa6e50cf7519632a4d8d1 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityDeleteForm.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityDeleteForm.php
@@ -34,19 +34,19 @@ public function buildForm(array $form, FormStateInterface $form_state) {
           $languages[] = $language->getName();
         }
 
-        $form['deleted_translations'] = array(
+        $form['deleted_translations'] = [
           '#theme' => 'item_list',
           '#title' => $this->t('The following @entity-type translations will be deleted:', [
             '@entity-type' => $entity->getEntityType()->getLowercaseLabel()
           ]),
           '#items' => $languages,
-        );
+        ];
 
         $form['actions']['submit']['#value'] = $this->t('Delete all translations');
       }
     }
     else {
-      $form['actions']['submit']['#value'] = $this->t('Delete @language translation', array('@language' => $entity->language()->getName()));
+      $form['actions']['submit']['#value'] = $this->t('Delete @language translation', ['@language' => $entity->language()->getName()]);
     }
 
     return $form;
@@ -129,11 +129,11 @@ public function getQuestion() {
     $entity = $this->getEntity();
 
     if (!$entity->isDefaultTranslation()) {
-      return $this->t('Are you sure you want to delete the @language translation of the @entity-type %label?', array(
+      return $this->t('Are you sure you want to delete the @language translation of the @entity-type %label?', [
         '@language' => $entity->language()->getName(),
         '@entity-type' => $this->getEntity()->getEntityType()->getLowercaseLabel(),
         '%label' => $this->getEntity()->label(),
-      ));
+      ]);
     }
 
     return $this->traitGetQuestion();
diff --git a/core/lib/Drupal/Core/Entity/ContentEntityNullStorage.php b/core/lib/Drupal/Core/Entity/ContentEntityNullStorage.php
index 5d3379f619a7673e678156ef0715c84c37d3c4b4..3dc00c9a993ecfa69bc7bc9945fbb51369226f54 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityNullStorage.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityNullStorage.php
@@ -15,7 +15,7 @@ class ContentEntityNullStorage extends ContentEntityStorageBase {
    * {@inheritdoc}
    */
   public function loadMultiple(array $ids = NULL) {
-    return array();
+    return [];
   }
 
   /**
@@ -47,8 +47,8 @@ public function deleteRevision($revision_id) {
   /**
    * {@inheritdoc}
    */
-  public function loadByProperties(array $values = array()) {
-    return array();
+  public function loadByProperties(array $values = []) {
+    return [];
   }
 
   /**
@@ -104,7 +104,7 @@ protected function doDeleteRevisionFieldItems(ContentEntityInterface $revision)
    * {@inheritdoc}
    */
   protected function readFieldItemsToPurge(FieldDefinitionInterface $field_definition, $batch_size) {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php b/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
index 2b3bbecf428b8861db6e21e6d646644eef4fa511..9d6b8d64f5089560d505aa266d850076aec3564f 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
@@ -84,7 +84,7 @@ protected function doCreate(array $values) {
       }
       $bundle = $values[$this->bundleKey];
     }
-    $entity = new $this->entityClass(array(), $this->entityTypeId, $bundle);
+    $entity = new $this->entityClass([], $this->entityTypeId, $bundle);
     $this->initFieldValues($entity, $values);
     return $entity;
   }
@@ -605,11 +605,11 @@ protected function cleanIds(array $ids) {
    */
   protected function getFromPersistentCache(array &$ids = NULL) {
     if (!$this->entityType->isPersistentlyCacheable() || empty($ids)) {
-      return array();
+      return [];
     }
-    $entities = array();
+    $entities = [];
     // Build the list of cache entries to retrieve.
-    $cid_map = array();
+    $cid_map = [];
     foreach ($ids as $id) {
       $cid_map[$id] = $this->buildCacheId($id);
     }
@@ -638,10 +638,10 @@ protected function setPersistentCache($entities) {
       return;
     }
 
-    $cache_tags = array(
+    $cache_tags = [
       $this->entityTypeId . '_values',
       'entity_field_info',
-    );
+    ];
     foreach ($entities as $id => $entity) {
       $this->cacheBackend->set($this->buildCacheId($id), $entity, CacheBackendInterface::CACHE_PERMANENT, $cache_tags);
     }
@@ -692,7 +692,7 @@ public function loadUnchanged($id) {
    */
   public function resetCache(array $ids = NULL) {
     if ($ids) {
-      $cids = array();
+      $cids = [];
       foreach ($ids as $id) {
         unset($this->entities[$id]);
         $cids[] = $this->buildCacheId($id);
@@ -702,9 +702,9 @@ public function resetCache(array $ids = NULL) {
       }
     }
     else {
-      $this->entities = array();
+      $this->entities = [];
       if ($this->entityType->isPersistentlyCacheable()) {
-        Cache::invalidateTags(array($this->entityTypeId . '_values'));
+        Cache::invalidateTags([$this->entityTypeId . '_values']);
       }
     }
   }
diff --git a/core/lib/Drupal/Core/Entity/ContentEntityType.php b/core/lib/Drupal/Core/Entity/ContentEntityType.php
index 6103a5629196fadf305ee69dad751d74299c6df4..0e26c3bb510759152a8ca864a0d03c58b6ecda95 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityType.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityType.php
@@ -19,10 +19,10 @@ class ContentEntityType extends EntityType implements ContentEntityTypeInterface
    */
   public function __construct($definition) {
     parent::__construct($definition);
-    $this->handlers += array(
+    $this->handlers += [
       'storage' => 'Drupal\Core\Entity\Sql\SqlContentEntityStorage',
       'view_builder' => 'Drupal\Core\Entity\EntityViewBuilder',
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/DependencyTrait.php b/core/lib/Drupal/Core/Entity/DependencyTrait.php
index f56a6a0a5f6de650de79fecf300919c62f73c333..1ba2579d40babc6b39c0ccdbcba952bd2d990151 100644
--- a/core/lib/Drupal/Core/Entity/DependencyTrait.php
+++ b/core/lib/Drupal/Core/Entity/DependencyTrait.php
@@ -12,7 +12,7 @@ trait DependencyTrait {
    *
    * @var array
    */
-  protected $dependencies = array();
+  protected $dependencies = [];
 
   /**
    * Adds a dependency.
@@ -30,7 +30,7 @@ trait DependencyTrait {
    */
   protected function addDependency($type, $name) {
     if (empty($this->dependencies[$type])) {
-      $this->dependencies[$type] = array($name);
+      $this->dependencies[$type] = [$name];
       if (count($this->dependencies) > 1) {
         // Ensure a consistent order of type keys.
         ksort($this->dependencies);
diff --git a/core/lib/Drupal/Core/Entity/Display/EntityDisplayInterface.php b/core/lib/Drupal/Core/Entity/Display/EntityDisplayInterface.php
index 7fa45a51fb0f2f19bbd5384eac8af52fc05b7d76..38baa15fe561b902da8a579e9522e2532d041f7d 100644
--- a/core/lib/Drupal/Core/Entity/Display/EntityDisplayInterface.php
+++ b/core/lib/Drupal/Core/Entity/Display/EntityDisplayInterface.php
@@ -54,7 +54,7 @@ public function getComponent($name);
    *
    * @return $this
    */
-  public function setComponent($name, array $options = array());
+  public function setComponent($name, array $options = []);
 
   /**
    * Sets a component to be hidden.
diff --git a/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php b/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
index 9c3e705bd3744755faab7b2cefa540c9994cb2d6..3e10f4a1ccb1a6d896e103282b26c8e9834968f0 100644
--- a/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
+++ b/core/lib/Drupal/Core/Entity/Element/EntityAutocomplete.php
@@ -31,7 +31,7 @@ public function getInfo() {
     // Apply default form element properties.
     $info['#target_type'] = NULL;
     $info['#selection_handler'] = 'default';
-    $info['#selection_settings'] = array();
+    $info['#selection_settings'] = [];
     $info['#tags'] = FALSE;
     $info['#autocreate'] = NULL;
     // This should only be set to FALSE if proper validation by the selection
@@ -42,8 +42,8 @@ public function getInfo() {
     // it's value is properly checked for access.
     $info['#process_default_value'] = TRUE;
 
-    $info['#element_validate'] = array(array($class, 'validateEntityAutocomplete'));
-    array_unshift($info['#process'], array($class, 'processEntityAutocomplete'));
+    $info['#element_validate'] = [[$class, 'validateEntityAutocomplete']];
+    array_unshift($info['#process'], [$class, 'processEntityAutocomplete']);
 
     return $info;
   }
@@ -60,7 +60,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
       elseif (!empty($element['#default_value']) && !is_array($element['#default_value'])) {
         // Convert the default value into an array for easier processing in
         // static::getEntityLabels().
-        $element['#default_value'] = array($element['#default_value']);
+        $element['#default_value'] = [$element['#default_value']];
       }
 
       if ($element['#default_value']) {
@@ -136,11 +136,11 @@ public static function processEntityAutocomplete(array &$element, FormStateInter
     }
 
     $element['#autocomplete_route_name'] = 'system.entity_autocomplete';
-    $element['#autocomplete_route_parameters'] = array(
+    $element['#autocomplete_route_parameters'] = [
       'target_type' => $element['#target_type'],
       'selection_handler' => $element['#selection_handler'],
       'selection_settings_key' => $selection_settings_key,
-    );
+    ];
 
     return $element;
   }
@@ -152,11 +152,11 @@ public static function validateEntityAutocomplete(array &$element, FormStateInte
     $value = NULL;
 
     if (!empty($element['#value'])) {
-      $options = array(
+      $options = [
         'target_type' => $element['#target_type'],
         'handler' => $element['#selection_handler'],
         'handler_settings' => $element['#selection_settings'],
-      );
+      ];
       /** @var /Drupal\Core\Entity\EntityReferenceSelection\SelectionInterface $handler */
       $handler = \Drupal::service('plugin.manager.entity_reference_selection')->getInstance($options);
       $autocreate = (bool) $element['#autocreate'] && $handler instanceof SelectionWithAutocreateInterface;
@@ -167,7 +167,7 @@ public static function validateEntityAutocomplete(array &$element, FormStateInte
         $value = $element['#value'];
       }
       else {
-        $input_values = $element['#tags'] ? Tags::explode($element['#value']) : array($element['#value']);
+        $input_values = $element['#tags'] ? Tags::explode($element['#value']) : [$element['#value']];
 
         foreach ($input_values as $input) {
           $match = static::extractEntityIdFromAutocompleteInput($input);
@@ -178,17 +178,17 @@ public static function validateEntityAutocomplete(array &$element, FormStateInte
           }
 
           if ($match !== NULL) {
-            $value[] = array(
+            $value[] = [
               'target_id' => $match,
-            );
+            ];
           }
           elseif ($autocreate) {
             /** @var \Drupal\Core\Entity\EntityReferenceSelection\SelectionWithAutocreateInterface $handler */
             // Auto-create item. See an example of how this is handled in
             // \Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem::presave().
-            $value[] = array(
+            $value[] = [
               'entity' => $handler->createNewEntity($element['#target_type'], $element['#autocreate']['bundle'], $input, $element['#autocreate']['uid']),
-            );
+            ];
           }
         }
       }
@@ -207,7 +207,7 @@ public static function validateEntityAutocomplete(array &$element, FormStateInte
           $valid_ids = $handler->validateReferenceableEntities($ids);
           if ($invalid_ids = array_diff($ids, $valid_ids)) {
             foreach ($invalid_ids as $invalid_id) {
-              $form_state->setError($element, t('The referenced entity (%type: %id) does not exist.', array('%type' => $element['#target_type'], '%id' => $invalid_id)));
+              $form_state->setError($element, t('The referenced entity (%type: %id) does not exist.', ['%type' => $element['#target_type'], '%id' => $invalid_id]));
             }
           }
         }
@@ -233,7 +233,7 @@ public static function validateEntityAutocomplete(array &$element, FormStateInte
 
           foreach ($invalid_new_entities as $entity) {
             /** @var \Drupal\Core\Entity\EntityInterface $entity */
-            $form_state->setError($element, t('This entity (%type: %label) cannot be referenced.', array('%type' => $element['#target_type'], '%label' => $entity->label())));
+            $form_state->setError($element, t('This entity (%type: %label) cannot be referenced.', ['%type' => $element['#target_type'], '%label' => $entity->label()]));
           }
         }
       }
@@ -275,10 +275,10 @@ protected static function matchEntityByTitle(SelectionInterface $handler, $input
     $entities = array_reduce($entities_by_bundle, function ($flattened, $bundle_entities) {
       return $flattened + $bundle_entities;
     }, []);
-    $params = array(
+    $params = [
       '%value' => $input,
       '@value' => $input,
-    );
+    ];
     if (empty($entities)) {
       if ($strict) {
         // Error if there are no entities available for a required field.
@@ -292,12 +292,12 @@ protected static function matchEntityByTitle(SelectionInterface $handler, $input
     }
     elseif (count($entities) > 1) {
       // More helpful error if there are only a few matching entities.
-      $multiples = array();
+      $multiples = [];
       foreach ($entities as $id => $name) {
         $multiples[] = $name . ' (' . $id . ')';
       }
       $params['@id'] = $id;
-      $form_state->setError($element, t('Multiple entities match this reference; "%multiple". Specify the one you want by appending the id in parentheses, like "@value (@id)".', array('%multiple' => implode('", "', $multiples)) + $params));
+      $form_state->setError($element, t('Multiple entities match this reference; "%multiple". Specify the one you want by appending the id in parentheses, like "@value (@id)".', ['%multiple' => implode('", "', $multiples)] + $params));
     }
     else {
       // Take the one and only matching entity.
@@ -318,7 +318,7 @@ protected static function matchEntityByTitle(SelectionInterface $handler, $input
    *   A string of entity labels separated by commas.
    */
   public static function getEntityLabels(array $entities) {
-    $entity_labels = array();
+    $entity_labels = [];
     foreach ($entities as $entity) {
       // Use the special view label, since some entities allow the label to be
       // viewed, even if the entity is not allowed to be viewed.
diff --git a/core/lib/Drupal/Core/Entity/Entity.php b/core/lib/Drupal/Core/Entity/Entity.php
index 2c6dbc118b170d193bbf4adf381b353f23081bba..f36f74fe6790384c362f6a64a38d61786644e7be 100644
--- a/core/lib/Drupal/Core/Entity/Entity.php
+++ b/core/lib/Drupal/Core/Entity/Entity.php
@@ -190,7 +190,7 @@ public function toUrl($rel = 'canonical', array $options = []) {
 
     if (isset($link_templates[$rel])) {
       $route_parameters = $this->urlRouteParameters($rel);
-      $route_name = "entity.{$this->entityTypeId}." . str_replace(array('-', 'drupal:'), array('_', ''), $rel);
+      $route_name = "entity.{$this->entityTypeId}." . str_replace(['-', 'drupal:'], ['_', ''], $rel);
       $uri = new Url($route_name, $route_parameters);
     }
     else {
@@ -275,7 +275,7 @@ public function toLink($text = NULL, $rel = 'canonical', array $options = []) {
   /**
    * {@inheritdoc}
    */
-  public function url($rel = 'canonical', $options = array()) {
+  public function url($rel = 'canonical', $options = []) {
     // While self::toUrl() will throw an exception if the entity has no id,
     // the expected result for a URL is always a string.
     if ($this->id() === NULL || !$this->hasLinkTemplate($rel)) {
@@ -353,7 +353,7 @@ public function language() {
     }
     // Make sure we return a proper language object.
     $langcode = !empty($this->langcode) ? $this->langcode : LanguageInterface::LANGCODE_NOT_SPECIFIED;
-    $language = new Language(array('id' => $langcode));
+    $language = new Language(['id' => $langcode]);
     return $language;
   }
 
@@ -369,7 +369,7 @@ public function save() {
    */
   public function delete() {
     if (!$this->isNew()) {
-      $this->entityManager()->getStorage($this->entityTypeId)->delete(array($this->id() => $this));
+      $this->entityManager()->getStorage($this->entityTypeId)->delete([$this->id() => $this]);
     }
   }
 
@@ -452,7 +452,7 @@ public static function postLoad(EntityStorageInterface $storage, array &$entitie
    * {@inheritdoc}
    */
   public function referencedEntities() {
-    return array();
+    return [];
   }
 
   /**
@@ -510,7 +510,7 @@ public static function loadMultiple(array $ids = NULL) {
   /**
    * {@inheritdoc}
    */
-  public static function create(array $values = array()) {
+  public static function create(array $values = []) {
     $entity_manager = \Drupal::entityManager();
     return $entity_manager->getStorage($entity_manager->getEntityTypeFromClass(get_called_class()))->create($values);
   }
@@ -585,7 +585,7 @@ public function setOriginalId($id) {
    * {@inheritdoc}
    */
   public function toArray() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php b/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php
index cd90ecce053cdfb3fb4ae75080ef96a3b93771c1..faa6d0d6af22c038c17c58fdb5cfdc1a78a7e710 100644
--- a/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php
+++ b/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php
@@ -95,23 +95,23 @@ public static function collectRenderDisplay(FieldableEntityInterface $entity, $f
     }
     // Else create a fresh runtime object.
     if (empty($display)) {
-      $display = $storage->create(array(
+      $display = $storage->create([
         'targetEntityType' => $entity_type,
         'bundle' => $bundle,
         'mode' => $form_mode,
         'status' => TRUE,
-      ));
+      ]);
     }
 
     // Let the display know which form mode was originally requested.
     $display->originalMode = $form_mode;
 
     // Let modules alter the display.
-    $display_context = array(
+    $display_context = [
       'entity_type' => $entity_type,
       'bundle' => $bundle,
       'form_mode' => $form_mode,
-    );
+    ];
     \Drupal::moduleHandler()->alter('entity_form_display', $display, $display_context);
 
     return $display;
@@ -136,13 +136,13 @@ public function getRenderer($field_name) {
 
     // Instantiate the widget object from the stored display properties.
     if (($configuration = $this->getComponent($field_name)) && isset($configuration['type']) && ($definition = $this->getFieldDefinition($field_name))) {
-      $widget = $this->pluginManager->getInstance(array(
+      $widget = $this->pluginManager->getInstance([
         'field_definition' => $definition,
         'form_mode' => $this->originalMode,
         // No need to prepare, defaults have been merged in setComponent().
         'prepare' => FALSE,
         'configuration' => $configuration
-      ));
+      ]);
     }
     else {
       $widget = NULL;
@@ -158,7 +158,7 @@ public function getRenderer($field_name) {
    */
   public function buildForm(FieldableEntityInterface $entity, array &$form, FormStateInterface $form_state) {
     // Set #parents to 'top-level' by default.
-    $form += array('#parents' => array());
+    $form += ['#parents' => []];
 
     // Let each widget generate the form elements.
     foreach ($this->getComponents() as $name => $options) {
@@ -185,7 +185,7 @@ public function buildForm(FieldableEntityInterface $entity, array &$form, FormSt
     $this->renderer->addCacheableDependency($form, $this);
 
     // Add a process callback so we can assign weights and hide extra fields.
-    $form['#process'][] = array($this, 'processForm');
+    $form['#process'][] = [$this, 'processForm'];
   }
 
   /**
@@ -203,7 +203,7 @@ public function processForm($element, FormStateInterface $form_state, $form) {
 
     // Hide extra fields.
     $extra_fields = \Drupal::entityManager()->getExtraFields($this->targetEntityType, $this->bundle);
-    $extra_fields = isset($extra_fields['form']) ? $extra_fields['form'] : array();
+    $extra_fields = isset($extra_fields['form']) ? $extra_fields['form'] : [];
     foreach ($extra_fields as $extra_field => $info) {
       if (!$this->getComponent($extra_field)) {
         $element[$extra_field]['#access'] = FALSE;
@@ -216,7 +216,7 @@ public function processForm($element, FormStateInterface $form_state, $form) {
    * {@inheritdoc}
    */
   public function extractFormValues(FieldableEntityInterface $entity, array &$form, FormStateInterface $form_state) {
-    $extracted = array();
+    $extracted = [];
     foreach ($entity as $name => $items) {
       if ($widget = $this->getRenderer($name)) {
         $widget->extractFormValues($items, $form, $form_state);
@@ -316,19 +316,19 @@ protected function movePropertyPathViolationsRelativeToField($field_name, Constr
    * {@inheritdoc}
    */
   public function getPluginCollections() {
-    $configurations = array();
+    $configurations = [];
     foreach ($this->getComponents() as $field_name => $configuration) {
       if (!empty($configuration['type']) && ($field_definition = $this->getFieldDefinition($field_name))) {
-        $configurations[$configuration['type']] = $configuration + array(
+        $configurations[$configuration['type']] = $configuration + [
           'field_definition' => $field_definition,
           'form_mode' => $this->mode,
-        );
+        ];
       }
     }
 
-    return array(
+    return [
       'widgets' => new EntityDisplayPluginCollection($this->pluginManager, $configurations)
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php b/core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php
index a6b83cf2c47c070c38cf2a05625376b01d4820fd..74b15b65f4754ebff62267a668027cc4ba52c9e6 100644
--- a/core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php
+++ b/core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php
@@ -70,12 +70,12 @@ class EntityViewDisplay extends EntityDisplayBase implements EntityViewDisplayIn
    */
   public static function collectRenderDisplays($entities, $view_mode) {
     if (empty($entities)) {
-      return array();
+      return [];
     }
 
     // Collect entity type and bundles.
     $entity_type = current($entities)->getEntityTypeId();
-    $bundles = array();
+    $bundles = [];
     foreach ($entities as $entity) {
       $bundles[$entity->bundle()] = TRUE;
     }
@@ -84,7 +84,7 @@ public static function collectRenderDisplays($entities, $view_mode) {
     // For each bundle, check the existence and status of:
     // - the display for the view mode,
     // - the 'default' display.
-    $candidate_ids = array();
+    $candidate_ids = [];
     foreach ($bundles as $bundle) {
       if ($view_mode != 'default') {
         $candidate_ids[$bundle][] = $entity_type . '.' . $bundle . '.' . $view_mode;
@@ -97,7 +97,7 @@ public static function collectRenderDisplays($entities, $view_mode) {
       ->execute();
 
     // For each bundle, select the first valid candidate display, if any.
-    $load_ids = array();
+    $load_ids = [];
     foreach ($bundles as $bundle) {
       foreach ($candidate_ids[$bundle] as $candidate_id) {
         if (isset($results[$candidate_id])) {
@@ -111,30 +111,30 @@ public static function collectRenderDisplays($entities, $view_mode) {
     $storage = \Drupal::entityManager()->getStorage('entity_view_display');
     $displays = $storage->loadMultiple($load_ids);
 
-    $displays_by_bundle = array();
+    $displays_by_bundle = [];
     foreach ($bundles as $bundle) {
       // Use the selected display if any, or create a fresh runtime object.
       if (isset($load_ids[$bundle])) {
         $display = $displays[$load_ids[$bundle]];
       }
       else {
-        $display = $storage->create(array(
+        $display = $storage->create([
           'targetEntityType' => $entity_type,
           'bundle' => $bundle,
           'mode' => $view_mode,
           'status' => TRUE,
-        ));
+        ]);
       }
 
       // Let the display know which view mode was originally requested.
       $display->originalMode = $view_mode;
 
       // Let modules alter the display.
-      $display_context = array(
+      $display_context = [
         'entity_type' => $entity_type,
         'bundle' => $bundle,
         'view_mode' => $view_mode,
-      );
+      ];
       \Drupal::moduleHandler()->alter('entity_view_display', $display, $display_context);
 
       $displays_by_bundle[$bundle] = $display;
@@ -159,7 +159,7 @@ public static function collectRenderDisplays($entities, $view_mode) {
    * @see \Drupal\Core\Entity\Entity\EntityViewDisplay::collectRenderDisplays()
    */
   public static function collectRenderDisplay(FieldableEntityInterface $entity, $view_mode) {
-    $displays = static::collectRenderDisplays(array($entity), $view_mode);
+    $displays = static::collectRenderDisplays([$entity], $view_mode);
     return $displays[$entity->bundle()];
   }
 
@@ -193,13 +193,13 @@ public function getRenderer($field_name) {
 
     // Instantiate the formatter object from the stored display properties.
     if (($configuration = $this->getComponent($field_name)) && isset($configuration['type']) && ($definition = $this->getFieldDefinition($field_name))) {
-      $formatter = $this->pluginManager->getInstance(array(
+      $formatter = $this->pluginManager->getInstance([
         'field_definition' => $definition,
         'view_mode' => $this->originalMode,
         // No need to prepare, defaults have been merged in setComponent().
         'prepare' => FALSE,
         'configuration' => $configuration
-      ));
+      ]);
     }
     else {
       $formatter = NULL;
@@ -214,7 +214,7 @@ public function getRenderer($field_name) {
    * {@inheritdoc}
    */
   public function build(FieldableEntityInterface $entity) {
-    $build = $this->buildMultiple(array($entity));
+    $build = $this->buildMultiple([$entity]);
     return $build[0];
   }
 
@@ -222,9 +222,9 @@ public function build(FieldableEntityInterface $entity) {
    * {@inheritdoc}
    */
   public function buildMultiple(array $entities) {
-    $build_list = array();
+    $build_list = [];
     foreach ($entities as $key => $entity) {
-      $build_list[$key] = array();
+      $build_list[$key] = [];
     }
 
     // Run field formatters.
@@ -232,7 +232,7 @@ public function buildMultiple(array $entities) {
       if ($formatter = $this->getRenderer($name)) {
         // Group items across all entities and pass them to the formatter's
         // prepareView() method.
-        $grouped_items = array();
+        $grouped_items = [];
         foreach ($entities as $id => $entity) {
           $items = $entity->get($name);
           $items->filterEmptyItems();
@@ -272,11 +272,11 @@ public function buildMultiple(array $entities) {
       }
 
       // Let other modules alter the renderable array.
-      $context = array(
+      $context = [
         'entity' => $entity,
         'view_mode' => $this->originalMode,
         'display' => $this,
-      );
+      ];
       \Drupal::moduleHandler()->alter('entity_display_build', $build_list[$id], $context);
     }
 
@@ -287,19 +287,19 @@ public function buildMultiple(array $entities) {
    * {@inheritdoc}
    */
   public function getPluginCollections() {
-    $configurations = array();
+    $configurations = [];
     foreach ($this->getComponents() as $field_name => $configuration) {
       if (!empty($configuration['type']) && ($field_definition = $this->getFieldDefinition($field_name))) {
-        $configurations[$configuration['type']] = $configuration + array(
+        $configurations[$configuration['type']] = $configuration + [
           'field_definition' => $field_definition,
           'view_mode' => $this->originalMode,
-        );
+        ];
       }
     }
 
-    return array(
+    return [
       'formatters' => new EntityDisplayPluginCollection($this->pluginManager, $configurations)
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Entity/EntityAccessControlHandler.php b/core/lib/Drupal/Core/Entity/EntityAccessControlHandler.php
index 15306934692b351b39d12a23d184736b7f4087d9..d1d43ee900b3fd55985298f5924673f66e02dd3b 100644
--- a/core/lib/Drupal/Core/Entity/EntityAccessControlHandler.php
+++ b/core/lib/Drupal/Core/Entity/EntityAccessControlHandler.php
@@ -18,7 +18,7 @@ class EntityAccessControlHandler extends EntityHandlerBase implements EntityAcce
    *
    * @var array
    */
-  protected $accessCache = array();
+  protected $accessCache = [];
 
   /**
    * The entity type ID of the access control handler instance.
@@ -207,18 +207,18 @@ protected function setCache($access, $cid, $operation, $langcode, AccountInterfa
    * {@inheritdoc}
    */
   public function resetCache() {
-    $this->accessCache = array();
+    $this->accessCache = [];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function createAccess($entity_bundle = NULL, AccountInterface $account = NULL, array $context = array(), $return_as_object = FALSE) {
+  public function createAccess($entity_bundle = NULL, AccountInterface $account = NULL, array $context = [], $return_as_object = FALSE) {
     $account = $this->prepareUser($account);
-    $context += array(
+    $context += [
       'entity_type_id' => $this->entityTypeId,
       'langcode' => LanguageInterface::LANGCODE_DEFAULT,
-    );
+    ];
 
     $cid = $entity_bundle ? 'create:' . $entity_bundle : 'create';
     if (($access = $this->getCache($cid, 'create', $context['langcode'], $account)) !== NULL) {
@@ -236,8 +236,8 @@ public function createAccess($entity_bundle = NULL, AccountInterface $account =
     // - No modules say to deny access.
     // - At least one module says to grant access.
     $access = array_merge(
-      $this->moduleHandler()->invokeAll('entity_create_access', array($account, $context, $entity_bundle)),
-      $this->moduleHandler()->invokeAll($this->entityTypeId . '_create_access', array($account, $context, $entity_bundle))
+      $this->moduleHandler()->invokeAll('entity_create_access', [$account, $context, $entity_bundle]),
+      $this->moduleHandler()->invokeAll($this->entityTypeId . '_create_access', [$account, $context, $entity_bundle])
     );
 
     $return = $this->processAccessHookResults($access);
@@ -312,19 +312,19 @@ public function fieldAccess($operation, FieldDefinitionInterface $field_definiti
 
     // Invoke hook and collect grants/denies for field access from other
     // modules. Our default access flag is masked under the ':default' key.
-    $grants = array(':default' => $default);
+    $grants = [':default' => $default];
     $hook_implementations = $this->moduleHandler()->getImplementations('entity_field_access');
     foreach ($hook_implementations as $module) {
-      $grants = array_merge($grants, array($module => $this->moduleHandler()->invoke($module, 'entity_field_access', array($operation, $field_definition, $account, $items))));
+      $grants = array_merge($grants, [$module => $this->moduleHandler()->invoke($module, 'entity_field_access', [$operation, $field_definition, $account, $items])]);
     }
 
     // Also allow modules to alter the returned grants/denies.
-    $context = array(
+    $context = [
       'operation' => $operation,
       'field_definition' => $field_definition,
       'items' => $items,
       'account' => $account,
-    );
+    ];
     $this->moduleHandler()->alter('entity_field_access', $grants, $context);
 
     $result = $this->processAccessHookResults($grants);
diff --git a/core/lib/Drupal/Core/Entity/EntityAccessControlHandlerInterface.php b/core/lib/Drupal/Core/Entity/EntityAccessControlHandlerInterface.php
index 0bec9c20397b3634f0fe39e85b23d6322a692ba8..5532996b2d993cb54fde2b8c7f2b3a9a75094f9e 100644
--- a/core/lib/Drupal/Core/Entity/EntityAccessControlHandlerInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityAccessControlHandlerInterface.php
@@ -60,7 +60,7 @@ public function access(EntityInterface $entity, $operation, AccountInterface $ac
    *   returned, i.e. TRUE means access is explicitly allowed, FALSE means
    *   access is either explicitly forbidden or "no opinion".
    */
-  public function createAccess($entity_bundle = NULL, AccountInterface $account = NULL, array $context = array(), $return_as_object = FALSE);
+  public function createAccess($entity_bundle = NULL, AccountInterface $account = NULL, array $context = [], $return_as_object = FALSE);
 
   /**
    * Clears all cached access checks.
diff --git a/core/lib/Drupal/Core/Entity/EntityAutocompleteMatcher.php b/core/lib/Drupal/Core/Entity/EntityAutocompleteMatcher.php
index 01a29b26bb8468911f65228bdbdc5a239f75d607..55372f9e7185044d3e7469e17c1f5b9ae250bf40 100644
--- a/core/lib/Drupal/Core/Entity/EntityAutocompleteMatcher.php
+++ b/core/lib/Drupal/Core/Entity/EntityAutocompleteMatcher.php
@@ -50,13 +50,13 @@ public function __construct(SelectionPluginManagerInterface $selection_manager)
    * @see \Drupal\system\Controller\EntityAutocompleteController
    */
   public function getMatches($target_type, $selection_handler, $selection_settings, $string = '') {
-    $matches = array();
+    $matches = [];
 
-    $options = array(
+    $options = [
       'target_type' => $target_type,
       'handler' => $selection_handler,
       'handler_settings' => $selection_settings,
-    );
+    ];
     $handler = $this->selectionManager->getInstance($options);
 
     if (isset($string)) {
@@ -73,7 +73,7 @@ public function getMatches($target_type, $selection_handler, $selection_settings
           $key = preg_replace('/\s\s+/', ' ', str_replace("\n", '', trim(Html::decodeEntities(strip_tags($key)))));
           // Names containing commas or quotes must be wrapped in quotes.
           $key = Tags::encode($key);
-          $matches[] = array('value' => $key, 'label' => $label);
+          $matches[] = ['value' => $key, 'label' => $label];
         }
       }
     }
diff --git a/core/lib/Drupal/Core/Entity/EntityConfirmFormBase.php b/core/lib/Drupal/Core/Entity/EntityConfirmFormBase.php
index 759183b9048af80650ce737b9a2547a47f4ae808..d8c39e439fa07e49e623d7297bc315637939ff2d 100644
--- a/core/lib/Drupal/Core/Entity/EntityConfirmFormBase.php
+++ b/core/lib/Drupal/Core/Entity/EntityConfirmFormBase.php
@@ -57,8 +57,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['#title'] = $this->getQuestion();
 
     $form['#attributes']['class'][] = 'confirmation';
-    $form['description'] = array('#markup' => $this->getDescription());
-    $form[$this->getFormName()] = array('#type' => 'hidden', '#value' => 1);
+    $form['description'] = ['#markup' => $this->getDescription()];
+    $form[$this->getFormName()] = ['#type' => 'hidden', '#value' => 1];
 
     // By default, render the form using theme_confirm_form().
     if (!isset($form['#theme'])) {
@@ -71,16 +71,16 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   protected function actions(array $form, FormStateInterface $form_state) {
-    return array(
-      'submit' => array(
+    return [
+      'submit' => [
         '#type' => 'submit',
         '#value' => $this->getConfirmText(),
-        '#submit' => array(
-          array($this, 'submitForm'),
-        ),
-      ),
+        '#submit' => [
+          [$this, 'submitForm'],
+        ],
+      ],
       'cancel' => ConfirmFormHelper::buildCancelLink($this, $this->getRequest()),
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/EntityConstraintViolationList.php b/core/lib/Drupal/Core/Entity/EntityConstraintViolationList.php
index 927dcd340d4b4b27c26248a41cd57c88cc31a8c6..c3404b6fa7fc7faeafe0fbc2374409a7198bb707 100644
--- a/core/lib/Drupal/Core/Entity/EntityConstraintViolationList.php
+++ b/core/lib/Drupal/Core/Entity/EntityConstraintViolationList.php
@@ -47,7 +47,7 @@ class EntityConstraintViolationList extends ConstraintViolationList implements E
    * @param array $violations
    *   The array of violations.
    */
-  public function __construct(FieldableEntityInterface $entity, array $violations = array()) {
+  public function __construct(FieldableEntityInterface $entity, array $violations = []) {
     parent::__construct($violations);
     $this->entity = $entity;
   }
@@ -156,7 +156,7 @@ public function filterByFields(array $field_names) {
    * {@inheritdoc}
    */
   public function filterByFieldAccess(AccountInterface $account = NULL) {
-    $filtered_fields = array();
+    $filtered_fields = [];
     foreach ($this->getFieldNames() as $field_name) {
       if (!$this->entity->get($field_name)->access('edit', $account)) {
         $filtered_fields[] = $field_name;
diff --git a/core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManager.php b/core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManager.php
index 3ead817353fba20e7ce97322a2170a6fa3287022..70dec2c27e34d9bc4291358a58a77d74dd7dbbed 100644
--- a/core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManager.php
+++ b/core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManager.php
@@ -42,7 +42,7 @@ public function needsUpdates() {
    * {@inheritdoc}
    */
   public function getChangeSummary() {
-    $summary = array();
+    $summary = [];
 
     foreach ($this->getChangeList() as $entity_type_id => $change_list) {
       // Process entity type definition changes.
@@ -259,7 +259,7 @@ protected function doFieldUpdate($op, $storage_definition = NULL, $original_stor
    */
   protected function getChangeList() {
     $this->entityManager->useCaches(FALSE);
-    $change_list = array();
+    $change_list = [];
 
     foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
       $original = $this->entityManager->getLastInstalledDefinition($entity_type_id);
@@ -275,7 +275,7 @@ protected function getChangeList() {
         }
 
         if ($this->entityManager->getStorage($entity_type_id) instanceof DynamicallyFieldableEntityStorageInterface) {
-          $field_changes = array();
+          $field_changes = [];
           $storage_definitions = $this->entityManager->getFieldStorageDefinitions($entity_type_id);
           $original_storage_definitions = $this->entityManager->getLastInstalledFieldStorageDefinitions($entity_type_id);
 
diff --git a/core/lib/Drupal/Core/Entity/EntityDeleteFormTrait.php b/core/lib/Drupal/Core/Entity/EntityDeleteFormTrait.php
index 8d5352bf2adb7d3fcde2660e96319b38f73b7979..2faf45c44a358625086e5a27e77600c241173aae 100644
--- a/core/lib/Drupal/Core/Entity/EntityDeleteFormTrait.php
+++ b/core/lib/Drupal/Core/Entity/EntityDeleteFormTrait.php
@@ -44,10 +44,10 @@ abstract protected function logger($channel);
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to delete the @entity-type %label?', array(
+    return $this->t('Are you sure you want to delete the @entity-type %label?', [
       '@entity-type' => $this->getEntity()->getEntityType()->getLowercaseLabel(),
       '%label' => $this->getEntity()->label(),
-    ));
+    ]);
   }
 
   /**
@@ -65,10 +65,10 @@ public function getConfirmText() {
    */
   protected function getDeletionMessage() {
     $entity = $this->getEntity();
-    return $this->t('The @entity-type %label has been deleted.', array(
+    return $this->t('The @entity-type %label has been deleted.', [
       '@entity-type' => $entity->getEntityType()->getLowercaseLabel(),
       '%label' => $entity->label(),
-    ));
+    ]);
   }
 
   /**
@@ -109,10 +109,10 @@ protected function getRedirectUrl() {
    */
   protected function logDeletionMessage() {
     $entity = $this->getEntity();
-    $this->logger($entity->getEntityType()->getProvider())->notice('The @entity-type %label has been deleted.', array(
+    $this->logger($entity->getEntityType()->getProvider())->notice('The @entity-type %label has been deleted.', [
       '@entity-type' => $entity->getEntityType()->getLowercaseLabel(),
       '%label' => $entity->label(),
-    ));
+    ]);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/EntityDisplayBase.php b/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
index b6c73e5550681cede203caed8ab0fc7e656e9b11..ca106b290fef815f5aa289e0f30ca48af6c73eaa 100644
--- a/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
+++ b/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
@@ -69,14 +69,14 @@ abstract class EntityDisplayBase extends ConfigEntityBase implements EntityDispl
    *
    * @var array
    */
-  protected $content = array();
+  protected $content = [];
 
   /**
    * List of components that are set to be hidden.
    *
    * @var array
    */
-  protected $hidden = array();
+  protected $hidden = [];
 
   /**
    * The original view or form mode that was requested (case of view/form modes
@@ -91,7 +91,7 @@ abstract class EntityDisplayBase extends ConfigEntityBase implements EntityDispl
    *
    * @var array
    */
-  protected $plugins = array();
+  protected $plugins = [];
 
   /**
    * Context in which this entity will be used (e.g. 'view', 'form').
@@ -158,14 +158,14 @@ protected function init() {
       // Fill in defaults for extra fields.
       $context = $this->displayContext == 'view' ? 'display' : $this->displayContext;
       $extra_fields = \Drupal::entityManager()->getExtraFields($this->targetEntityType, $this->bundle);
-      $extra_fields = isset($extra_fields[$context]) ? $extra_fields[$context] : array();
+      $extra_fields = isset($extra_fields[$context]) ? $extra_fields[$context] : [];
       foreach ($extra_fields as $name => $definition) {
         if (!isset($this->content[$name]) && !isset($this->hidden[$name])) {
           // Extra fields are visible by default unless they explicitly say so.
           if (!isset($definition['visible']) || $definition['visible'] == TRUE) {
-            $this->content[$name] = array(
+            $this->content[$name] = [
               'weight' => $definition['weight']
-            );
+            ];
           }
           else {
             $this->hidden[$name] = TRUE;
@@ -359,7 +359,7 @@ public function getComponent($name) {
   /**
    * {@inheritdoc}
    */
-  public function setComponent($name, array $options = array()) {
+  public function setComponent($name, array $options = []) {
     // If no weight specified, make sure the field sinks at the bottom.
     if (!isset($options['weight'])) {
       $max = $this->getHighestWeight();
@@ -396,7 +396,7 @@ public function removeComponent($name) {
    * {@inheritdoc}
    */
   public function getHighestWeight() {
-    $weights = array();
+    $weights = [];
 
     // Collect weights for the components in the display.
     foreach ($this->content as $options) {
@@ -406,7 +406,7 @@ public function getHighestWeight() {
     }
 
     // Let other modules feedback about their own additions.
-    $weights = array_merge($weights, \Drupal::moduleHandler()->invokeAll('field_info_max_weight', array($this->targetEntityType, $this->bundle, $this->displayContext, $this->mode)));
+    $weights = array_merge($weights, \Drupal::moduleHandler()->invokeAll('field_info_max_weight', [$this->targetEntityType, $this->bundle, $this->displayContext, $this->mode]));
 
     return $weights ? max($weights) : NULL;
   }
@@ -428,7 +428,7 @@ protected function getFieldDefinitions() {
       // For "official" view modes and form modes, ignore fields whose
       // definition states they should not be displayed.
       if ($this->mode !== static::CUSTOM_MODE) {
-        $definitions = array_filter($definitions, array($this, 'fieldHasDisplayOptions'));
+        $definitions = array_filter($definitions, [$this, 'fieldHasDisplayOptions']);
       }
       $this->fieldDefinitions = $definitions;
     }
diff --git a/core/lib/Drupal/Core/Entity/EntityDisplayRepository.php b/core/lib/Drupal/Core/Entity/EntityDisplayRepository.php
index 0ee431738d942254677a59ef776d09a3266a5243..d959881eac52abf6652e322852968bd71bb75ca9 100644
--- a/core/lib/Drupal/Core/Entity/EntityDisplayRepository.php
+++ b/core/lib/Drupal/Core/Entity/EntityDisplayRepository.php
@@ -187,7 +187,7 @@ public function getFormModeOptionsByBundle($entity_type_id, $bundle) {
    *   An array of display mode labels, keyed by the display mode ID.
    */
   protected function getDisplayModeOptions($display_type, $entity_type_id) {
-    $options = array('default' => t('Default'));
+    $options = ['default' => t('Default')];
     foreach ($this->getDisplayModesByEntityType($display_type, $entity_type_id) as $mode => $settings) {
       $options[$mode] = $settings['label'];
     }
@@ -213,7 +213,7 @@ protected function getDisplayModeOptionsByBundle($display_type, $entity_type_id,
 
     // Filter out modes for which the entity display is disabled
     // (or non-existent).
-    $load_ids = array();
+    $load_ids = [];
     // Get the list of available entity displays for the current bundle.
     foreach (array_keys($options) as $mode) {
       $load_ids[] = $entity_type_id . '.' . $bundle . '.' . $mode;
diff --git a/core/lib/Drupal/Core/Entity/EntityForm.php b/core/lib/Drupal/Core/Entity/EntityForm.php
index b4f6bd6f022ca69eda4e1abdffbfc1866d429e4f..35062185e9f86f0f2b907687b2b10cda48b7c276 100644
--- a/core/lib/Drupal/Core/Entity/EntityForm.php
+++ b/core/lib/Drupal/Core/Entity/EntityForm.php
@@ -204,9 +204,9 @@ protected function actionsElement(array $form, FormStateInterface $form_state) {
 
     $count = 0;
     foreach (Element::children($element) as $action) {
-      $element[$action] += array(
+      $element[$action] += [
         '#weight' => ++$count * 5,
-      );
+      ];
     }
 
     if (!empty($element)) {
@@ -226,11 +226,11 @@ protected function actions(array $form, FormStateInterface $form_state) {
     // @todo Consider renaming the action key from submit to save. The impacts
     //   are hard to predict. For example, see
     //   \Drupal\language\Element\LanguageConfiguration::processLanguageConfiguration().
-    $actions['submit'] = array(
+    $actions['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
-      '#submit' => array('::submitForm', '::save'),
-    );
+      '#submit' => ['::submitForm', '::save'],
+    ];
 
     if (!$this->entity->isNew() && $this->entity->hasLinkTemplate('delete-form')) {
       $route_info = $this->entity->urlInfo('delete-form');
@@ -239,14 +239,14 @@ protected function actions(array $form, FormStateInterface $form_state) {
         $query['destination'] = $this->getRequest()->query->get('destination');
         $route_info->setOption('query', $query);
       }
-      $actions['delete'] = array(
+      $actions['delete'] = [
         '#type' => 'link',
         '#title' => $this->t('Delete'),
         '#access' => $this->entity->access('delete'),
-        '#attributes' => array(
-          'class' => array('button', 'button--danger'),
-        ),
-      );
+        '#attributes' => [
+          'class' => ['button', 'button--danger'],
+        ],
+      ];
       $actions['delete']['#url'] = $route_info;
     }
 
@@ -294,7 +294,7 @@ public function buildEntity(array $form, FormStateInterface $form_state) {
     // properties.
     if (isset($form['#entity_builders'])) {
       foreach ($form['#entity_builders'] as $function) {
-        call_user_func_array($form_state->prepareCallback($function), array($entity->getEntityTypeId(), $entity, &$form, &$form_state));
+        call_user_func_array($form_state->prepareCallback($function), [$entity->getEntityTypeId(), $entity, &$form, &$form_state]);
       }
     }
 
@@ -391,7 +391,7 @@ protected function prepareInvokeAll($hook, FormStateInterface $form_state) {
       if (function_exists($function)) {
         // Ensure we pass an updated translation object and form display at
         // each invocation, since they depend on form state which is alterable.
-        $args = array($this->entity, $this->operation, &$form_state);
+        $args = [$this->entity, $this->operation, &$form_state];
         call_user_func_array($function, $args);
       }
     }
diff --git a/core/lib/Drupal/Core/Entity/EntityFormBuilder.php b/core/lib/Drupal/Core/Entity/EntityFormBuilder.php
index ff4b9178bc760895e66a47fd06c5c7977998251c..d5f0baf00f08583bdcebdafb23b5cfd0c1d59913 100644
--- a/core/lib/Drupal/Core/Entity/EntityFormBuilder.php
+++ b/core/lib/Drupal/Core/Entity/EntityFormBuilder.php
@@ -40,7 +40,7 @@ public function __construct(EntityManagerInterface $entity_manager, FormBuilderI
   /**
    * {@inheritdoc}
    */
-  public function getForm(EntityInterface $entity, $operation = 'default', array $form_state_additions = array()) {
+  public function getForm(EntityInterface $entity, $operation = 'default', array $form_state_additions = []) {
     $form_object = $this->entityManager->getFormObject($entity->getEntityTypeId(), $operation);
     $form_object->setEntity($entity);
 
diff --git a/core/lib/Drupal/Core/Entity/EntityFormBuilderInterface.php b/core/lib/Drupal/Core/Entity/EntityFormBuilderInterface.php
index bfcead12b37fbe2efe27a6d3e5cfd65ebbc0961f..2265cd0ff6aee898a990434876f11724c45ed51d 100644
--- a/core/lib/Drupal/Core/Entity/EntityFormBuilderInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityFormBuilderInterface.php
@@ -53,6 +53,6 @@ interface EntityFormBuilderInterface {
    * @see \Drupal\Core\Entity\EntityTypeInterface::setFormClass()
    * @see system_entity_type_build()
    */
-  public function getForm(EntityInterface $entity, $operation = 'default', array $form_state_additions = array());
+  public function getForm(EntityInterface $entity, $operation = 'default', array $form_state_additions = []);
 
 }
diff --git a/core/lib/Drupal/Core/Entity/EntityInterface.php b/core/lib/Drupal/Core/Entity/EntityInterface.php
index 3a38e072dd60a3afc3bfff20e458b4997adfbd67..8890fb7f34ca3b3a99d05cc8c08ca65b76c604f1 100644
--- a/core/lib/Drupal/Core/Entity/EntityInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityInterface.php
@@ -112,7 +112,7 @@ public function label();
    *
    * @see \Drupal\Core\Entity\EntityInterface::toUrl
    */
-  public function urlInfo($rel = 'canonical', array $options = array());
+  public function urlInfo($rel = 'canonical', array $options = []);
 
   /**
    * Gets the URL object for the entity.
@@ -150,7 +150,7 @@ public function urlInfo($rel = 'canonical', array $options = array());
    * @throws \Drupal\Core\Entity\EntityMalformedException
    * @throws \Drupal\Core\Entity\Exception\UndefinedLinkTemplateException
    */
-  public function toUrl($rel = 'canonical', array $options = array());
+  public function toUrl($rel = 'canonical', array $options = []);
 
   /**
    * Gets the public URL for this entity.
@@ -169,7 +169,7 @@ public function toUrl($rel = 'canonical', array $options = array());
    *
    * @see \Drupal\Core\Entity\EntityInterface::toUrl
    */
-  public function url($rel = 'canonical', $options = array());
+  public function url($rel = 'canonical', $options = []);
 
   /**
    * Deprecated way of generating a link to the entity. See toLink().
@@ -264,7 +264,7 @@ public static function loadMultiple(array $ids = NULL);
    * @return static
    *   The entity object.
    */
-  public static function create(array $values = array());
+  public static function create(array $values = []);
 
   /**
    * Saves an entity permanently.
diff --git a/core/lib/Drupal/Core/Entity/EntityListBuilder.php b/core/lib/Drupal/Core/Entity/EntityListBuilder.php
index b9c8db3d04a78845ef425f3d7906bf228895c1e1..7f46915ae98c966468626f36273d1900a20ea663 100644
--- a/core/lib/Drupal/Core/Entity/EntityListBuilder.php
+++ b/core/lib/Drupal/Core/Entity/EntityListBuilder.php
@@ -120,7 +120,7 @@ protected function getLabel(EntityInterface $entity) {
    */
   public function getOperations(EntityInterface $entity) {
     $operations = $this->getDefaultOperations($entity);
-    $operations += $this->moduleHandler()->invokeAll('entity_operation', array($entity));
+    $operations += $this->moduleHandler()->invokeAll('entity_operation', [$entity]);
     $this->moduleHandler->alter('entity_operation', $operations, $entity);
     uasort($operations, '\Drupal\Component\Utility\SortArray::sortByWeightElement');
 
@@ -138,20 +138,20 @@ public function getOperations(EntityInterface $entity) {
    *   self::getOperations().
    */
   protected function getDefaultOperations(EntityInterface $entity) {
-    $operations = array();
+    $operations = [];
     if ($entity->access('update') && $entity->hasLinkTemplate('edit-form')) {
-      $operations['edit'] = array(
+      $operations['edit'] = [
         'title' => $this->t('Edit'),
         'weight' => 10,
         'url' => $entity->urlInfo('edit-form'),
-      );
+      ];
     }
     if ($entity->access('delete') && $entity->hasLinkTemplate('delete-form')) {
-      $operations['delete'] = array(
+      $operations['delete'] = [
         'title' => $this->t('Delete'),
         'weight' => 100,
         'url' => $entity->urlInfo('delete-form'),
-      );
+      ];
     }
 
     return $operations;
@@ -198,10 +198,10 @@ public function buildRow(EntityInterface $entity) {
    * @see \Drupal\Core\Entity\EntityListBuilder::buildRow()
    */
   public function buildOperations(EntityInterface $entity) {
-    $build = array(
+    $build = [
       '#type' => 'operations',
       '#links' => $this->getOperations($entity),
-    );
+    ];
 
     return $build;
   }
@@ -214,17 +214,17 @@ public function buildOperations(EntityInterface $entity) {
    * @todo Add a link to add a new item to the #empty text.
    */
   public function render() {
-    $build['table'] = array(
+    $build['table'] = [
       '#type' => 'table',
       '#header' => $this->buildHeader(),
       '#title' => $this->getTitle(),
-      '#rows' => array(),
-      '#empty' => $this->t('There is no @label yet.', array('@label' => $this->entityType->getLabel())),
+      '#rows' => [],
+      '#empty' => $this->t('There is no @label yet.', ['@label' => $this->entityType->getLabel()]),
       '#cache' => [
         'contexts' => $this->entityType->getListCacheContexts(),
         'tags' => $this->entityType->getListCacheTags(),
       ],
-    );
+    ];
     foreach ($this->load() as $entity) {
       if ($row = $this->buildRow($entity)) {
         $build['table']['#rows'][$entity->id()] = $row;
@@ -233,9 +233,9 @@ public function render() {
 
     // Only add the pager if a limit is specified.
     if ($this->limit) {
-      $build['pager'] = array(
+      $build['pager'] = [
         '#type' => 'pager',
-      );
+      ];
     }
     return $build;
   }
diff --git a/core/lib/Drupal/Core/Entity/EntityManager.php b/core/lib/Drupal/Core/Entity/EntityManager.php
index bf4acf357b0f1794dba497515a209e2753e24881..fa2ddf8c7922e2a3ddfecf4e9a9f62ac3306ad4f 100644
--- a/core/lib/Drupal/Core/Entity/EntityManager.php
+++ b/core/lib/Drupal/Core/Entity/EntityManager.php
@@ -265,7 +265,7 @@ public function getEntityTypeLabels($group = FALSE) {
    *
    * @deprecated in Drupal 8.0.0, will be removed before Drupal 9.0.0.
    */
-  public function getTranslationFromContext(EntityInterface $entity, $langcode = NULL, $context = array()) {
+  public function getTranslationFromContext(EntityInterface $entity, $langcode = NULL, $context = []) {
     return $this->container->get('entity.repository')->getTranslationFromContext($entity, $langcode, $context);
   }
 
diff --git a/core/lib/Drupal/Core/Entity/EntityReferenceSelection/SelectionPluginManager.php b/core/lib/Drupal/Core/Entity/EntityReferenceSelection/SelectionPluginManager.php
index 1b35d4aafaae09a14497039bc06e9b0da1b34976..53b43fdc68926f8d98b96fe8f3e0040f569e08d8 100644
--- a/core/lib/Drupal/Core/Entity/EntityReferenceSelection/SelectionPluginManager.php
+++ b/core/lib/Drupal/Core/Entity/EntityReferenceSelection/SelectionPluginManager.php
@@ -37,10 +37,10 @@ public function getInstance(array $options) {
     }
 
     // Initialize default options.
-    $options += array(
+    $options += [
       'handler' => $this->getPluginId($options['target_type'], 'default'),
-      'handler_settings' => array(),
-    );
+      'handler_settings' => [],
+    ];
 
     // A specific selection plugin ID was already specified.
     if (strpos($options['handler'], ':') !== FALSE) {
@@ -62,7 +62,7 @@ public function getPluginId($target_type, $base_plugin_id) {
     $selection_handler_groups = $this->getSelectionGroups($target_type);
 
     // Sort the selection plugins by weight and select the best match.
-    uasort($selection_handler_groups[$base_plugin_id], array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
+    uasort($selection_handler_groups[$base_plugin_id], ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
     end($selection_handler_groups[$base_plugin_id]);
     $plugin_id = key($selection_handler_groups[$base_plugin_id]);
 
@@ -73,7 +73,7 @@ public function getPluginId($target_type, $base_plugin_id) {
    * {@inheritdoc}
    */
   public function getSelectionGroups($entity_type_id) {
-    $plugins = array();
+    $plugins = [];
     $definitions = $this->getDefinitions();
 
     // Do not display the 'broken' plugin in the UI.
@@ -92,19 +92,19 @@ public function getSelectionGroups($entity_type_id) {
    * {@inheritdoc}
    */
   public function getSelectionHandler(FieldDefinitionInterface $field_definition, EntityInterface $entity = NULL) {
-    $options = array(
+    $options = [
       'target_type' => $field_definition->getFieldStorageDefinition()->getSetting('target_type'),
       'handler' => $field_definition->getSetting('handler'),
-      'handler_settings' => $field_definition->getSetting('handler_settings') ?: array(),
+      'handler_settings' => $field_definition->getSetting('handler_settings') ?: [],
       'entity' => $entity,
-    );
+    ];
     return $this->getInstance($options);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function getFallbackPluginId($plugin_id, array $configuration = array()) {
+  public function getFallbackPluginId($plugin_id, array $configuration = []) {
     return 'broken';
   }
 
diff --git a/core/lib/Drupal/Core/Entity/EntityRepository.php b/core/lib/Drupal/Core/Entity/EntityRepository.php
index 5fb7501f0a31ade432735df7ada1718c1d1c8d3f..986cc50b5433d3e903ff4b4bc20056c813fb8987 100644
--- a/core/lib/Drupal/Core/Entity/EntityRepository.php
+++ b/core/lib/Drupal/Core/Entity/EntityRepository.php
@@ -79,7 +79,7 @@ public function loadEntityByConfigTarget($entity_type_id, $target) {
   /**
    * {@inheritdoc}
    */
-  public function getTranslationFromContext(EntityInterface $entity, $langcode = NULL, $context = array()) {
+  public function getTranslationFromContext(EntityInterface $entity, $langcode = NULL, $context = []) {
     $translation = $entity;
 
     if ($entity instanceof TranslatableInterface && count($entity->getTranslationLanguages()) > 1) {
@@ -92,7 +92,7 @@ public function getTranslationFromContext(EntityInterface $entity, $langcode = N
       // negotiation, unless the current translation is already the desired one.
       if ($entity->language()->getId() != $langcode) {
         $context['data'] = $entity;
-        $context += array('operation' => 'entity_view', 'langcode' => $langcode);
+        $context += ['operation' => 'entity_view', 'langcode' => $langcode];
         $candidates = $this->languageManager->getFallbackCandidates($context);
 
         // Ensure the default language has the proper language code.
diff --git a/core/lib/Drupal/Core/Entity/EntityRepositoryInterface.php b/core/lib/Drupal/Core/Entity/EntityRepositoryInterface.php
index efbfb6be039ce6f823c38eaef7280b27a7747d6a..d1229d4554c30783808d8ce0785a160f0bfe47f2 100644
--- a/core/lib/Drupal/Core/Entity/EntityRepositoryInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityRepositoryInterface.php
@@ -67,6 +67,6 @@ public function loadEntityByConfigTarget($entity_type_id, $target);
    *
    * @see \Drupal\Core\Language\LanguageManagerInterface::getFallbackCandidates()
    */
-  public function getTranslationFromContext(EntityInterface $entity, $langcode = NULL, $context = array());
+  public function getTranslationFromContext(EntityInterface $entity, $langcode = NULL, $context = []);
 
 }
diff --git a/core/lib/Drupal/Core/Entity/EntityResolverManager.php b/core/lib/Drupal/Core/Entity/EntityResolverManager.php
index 847a480e4c9e48f494a0ca89851f69da30e1b3a0..e9a87d6a6e7b2d3e0cdd0c949e852a4d888c2971 100644
--- a/core/lib/Drupal/Core/Entity/EntityResolverManager.php
+++ b/core/lib/Drupal/Core/Entity/EntityResolverManager.php
@@ -70,13 +70,13 @@ protected function getControllerClass(array $defaults) {
       // Check if the class exists and if so use the buildForm() method from the
       // interface.
       if (class_exists($controller)) {
-        return array($controller, 'buildForm');
+        return [$controller, 'buildForm'];
       }
     }
 
     if (strpos($controller, ':') === FALSE) {
       if (method_exists($controller, '__invoke')) {
-        return array($controller, '__invoke');
+        return [$controller, '__invoke'];
       }
       if (function_exists($controller)) {
         return $controller;
@@ -91,7 +91,7 @@ protected function getControllerClass(array $defaults) {
       // that could not exist at this point. There is however no other way to
       // do it, as the container does not allow static introspection.
       list($class_or_service, $method) = explode(':', $controller, 2);
-      return array($this->classResolver->getInstanceFromDefinition($class_or_service), $method);
+      return [$this->classResolver->getInstanceFromDefinition($class_or_service), $method];
     }
     elseif (strpos($controller, '::') !== FALSE) {
       // Controller in the class::method notation.
@@ -114,7 +114,7 @@ protected function getControllerClass(array $defaults) {
    */
   protected function setParametersFromReflection($controller, Route $route) {
     $entity_types = $this->getEntityTypes();
-    $parameter_definitions = $route->getOption('parameters') ?: array();
+    $parameter_definitions = $route->getOption('parameters') ?: [];
 
     $result = FALSE;
 
@@ -136,10 +136,10 @@ protected function setParametersFromReflection($controller, Route $route) {
         $entity_type = $entity_types[$parameter_name];
         $entity_class = $entity_type->getClass();
         if (($reflection_class = $parameter->getClass()) && (is_subclass_of($entity_class, $reflection_class->name) || $entity_class == $reflection_class->name)) {
-          $parameter_definitions += array($parameter_name => array());
-          $parameter_definitions[$parameter_name] += array(
+          $parameter_definitions += [$parameter_name => []];
+          $parameter_definitions[$parameter_name] += [
             'type' => 'entity:' . $parameter_name,
-          );
+          ];
           $result = TRUE;
         }
       }
@@ -170,7 +170,7 @@ protected function setParametersFromEntityInformation(Route $route) {
     // parameter in the first place. This is the case for add forms, for
     // example.
     if (isset($entity_type) && isset($this->getEntityTypes()[$entity_type]) && (strpos($route->getPath(), '{' . $entity_type . '}') !== FALSE)) {
-      $parameter_definitions = $route->getOption('parameters') ?: array();
+      $parameter_definitions = $route->getOption('parameters') ?: [];
 
       // First try to figure out whether there is already a parameter upcasting
       // the same entity type already.
@@ -185,11 +185,11 @@ protected function setParametersFromEntityInformation(Route $route) {
       }
 
       if (!isset($parameter_definitions[$entity_type])) {
-        $parameter_definitions[$entity_type] = array();
+        $parameter_definitions[$entity_type] = [];
       }
-      $parameter_definitions[$entity_type] += array(
+      $parameter_definitions[$entity_type] += [
         'type' => 'entity:' . $entity_type,
-      );
+      ];
       if (!empty($parameter_definitions)) {
         $route->setOption('parameters', $parameter_definitions);
       }
diff --git a/core/lib/Drupal/Core/Entity/EntityStorageBase.php b/core/lib/Drupal/Core/Entity/EntityStorageBase.php
index f58312106e41f73738938d03db0df24b5b86a50c..99698df0ae21986df51086fe88cc960dc9797c6f 100644
--- a/core/lib/Drupal/Core/Entity/EntityStorageBase.php
+++ b/core/lib/Drupal/Core/Entity/EntityStorageBase.php
@@ -14,7 +14,7 @@ abstract class EntityStorageBase extends EntityHandlerBase implements EntityStor
    *
    * @var array
    */
-  protected $entities = array();
+  protected $entities = [];
 
   /**
    * Entity type ID for this storage.
@@ -105,7 +105,7 @@ public function getEntityType() {
    * {@inheritdoc}
    */
   public function loadUnchanged($id) {
-    $this->resetCache(array($id));
+    $this->resetCache([$id]);
     return $this->load($id);
   }
 
@@ -119,7 +119,7 @@ public function resetCache(array $ids = NULL) {
       }
     }
     else {
-      $this->entities = array();
+      $this->entities = [];
     }
   }
 
@@ -133,7 +133,7 @@ public function resetCache(array $ids = NULL) {
    *   Array of entities from the entity cache.
    */
   protected function getFromStaticCache(array $ids) {
-    $entities = array();
+    $entities = [];
     // Load any available entities from the internal cache.
     if ($this->entityType->isStaticallyCacheable() && !empty($this->entities)) {
       $entities += array_intersect_key($this->entities, array_flip($ids));
@@ -164,15 +164,15 @@ protected function setStaticCache(array $entities) {
    */
   protected function invokeHook($hook, EntityInterface $entity) {
     // Invoke the hook.
-    $this->moduleHandler()->invokeAll($this->entityTypeId . '_' . $hook, array($entity));
+    $this->moduleHandler()->invokeAll($this->entityTypeId . '_' . $hook, [$entity]);
     // Invoke the respective entity-level hook.
-    $this->moduleHandler()->invokeAll('entity_' . $hook, array($entity));
+    $this->moduleHandler()->invokeAll('entity_' . $hook, [$entity]);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function create(array $values = array()) {
+  public function create(array $values = []) {
     $entity_class = $this->entityClass;
     $entity_class::preCreate($this, $values);
 
@@ -209,7 +209,7 @@ protected function doCreate(array $values) {
    * {@inheritdoc}
    */
   public function load($id) {
-    $entities = $this->loadMultiple(array($id));
+    $entities = $this->loadMultiple([$id]);
     return isset($entities[$id]) ? $entities[$id] : NULL;
   }
 
@@ -217,7 +217,7 @@ public function load($id) {
    * {@inheritdoc}
    */
   public function loadMultiple(array $ids = NULL) {
-    $entities = array();
+    $entities = [];
 
     // Create a new variable which is either a prepared version of the $ids
     // array for later comparison with the entity cache, or FALSE if no $ids
@@ -317,7 +317,7 @@ protected function postLoad(array &$entities) {
    *   An array of entity objects implementing the EntityInterface.
    */
   protected function mapFromStorageRecords(array $records) {
-    $entities = array();
+    $entities = [];
     foreach ($records as $record) {
       $entity = new $this->entityClass($record, $this->entityTypeId);
       $entities[$entity->id()] = $entity;
@@ -460,7 +460,7 @@ abstract protected function doSave($id, EntityInterface $entity);
    *   Specifies whether the entity is being updated or created.
    */
   protected function doPostSave(EntityInterface $entity, $update) {
-    $this->resetCache(array($entity->id()));
+    $this->resetCache([$entity->id()]);
 
     // The entity is no longer new.
     $entity->enforceIsNew(FALSE);
@@ -496,12 +496,12 @@ protected function buildPropertyQuery(QueryInterface $entity_query, array $value
   /**
    * {@inheritdoc}
    */
-  public function loadByProperties(array $values = array()) {
+  public function loadByProperties(array $values = []) {
     // Build a query to fetch the entity IDs.
     $entity_query = $this->getQuery();
     $this->buildPropertyQuery($entity_query, $values);
     $result = $entity_query->execute();
-    return $result ? $this->loadMultiple($result) : array();
+    return $result ? $this->loadMultiple($result) : [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/EntityStorageInterface.php b/core/lib/Drupal/Core/Entity/EntityStorageInterface.php
index e4031239be7efbab92d3ca0e178c7615bc669101..50166d6e27877febcc87c0ba6213456bdd63094a 100644
--- a/core/lib/Drupal/Core/Entity/EntityStorageInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityStorageInterface.php
@@ -102,7 +102,7 @@ public function deleteRevision($revision_id);
    * @return \Drupal\Core\Entity\EntityInterface[]
    *   An array of entity objects indexed by their ids.
    */
-  public function loadByProperties(array $values = array());
+  public function loadByProperties(array $values = []);
 
   /**
    * Constructs a new entity object, without permanently saving it.
@@ -114,7 +114,7 @@ public function loadByProperties(array $values = array());
    * @return \Drupal\Core\Entity\EntityInterface
    *   A new entity object.
    */
-  public function create(array $values = array());
+  public function create(array $values = []);
 
   /**
    * Deletes permanently saved entities.
diff --git a/core/lib/Drupal/Core/Entity/EntityType.php b/core/lib/Drupal/Core/Entity/EntityType.php
index 9f2587e69db7fdab6c335ef2c554c1bbc5bc9027..f9555a8dde18c3a1d68fef19608a5ca7f663be97 100644
--- a/core/lib/Drupal/Core/Entity/EntityType.php
+++ b/core/lib/Drupal/Core/Entity/EntityType.php
@@ -43,7 +43,7 @@ class EntityType extends PluginDefinition implements EntityTypeInterface {
    *
    * @var array
    */
-  protected $entity_keys = array();
+  protected $entity_keys = [];
 
   /**
    * The unique identifier of this entity type.
@@ -66,7 +66,7 @@ class EntityType extends PluginDefinition implements EntityTypeInterface {
    *
    * @var array
    */
-  protected $handlers = array();
+  protected $handlers = [];
 
   /**
    * The name of the default administrative permission.
@@ -88,7 +88,7 @@ class EntityType extends PluginDefinition implements EntityTypeInterface {
    *
    * @var array
    */
-  protected $links = array();
+  protected $links = [];
 
   /**
    * The name of a callback that returns the label of the entity.
@@ -258,7 +258,7 @@ class EntityType extends PluginDefinition implements EntityTypeInterface {
    *
    * @var array[]
    */
-  protected $constraints = array();
+  protected $constraints = [];
 
   /**
    * Any additional properties and values.
@@ -287,15 +287,15 @@ public function __construct($definition) {
     }
 
     // Ensure defaults.
-    $this->entity_keys += array(
+    $this->entity_keys += [
       'revision' => '',
       'bundle' => '',
       'langcode' => '',
       'default_langcode' => 'default_langcode',
-    );
-    $this->handlers += array(
+    ];
+    $this->handlers += [
       'access' => 'Drupal\Core\Entity\EntityAccessControlHandler',
-    );
+    ];
     if (isset($this->handlers['storage'])) {
       $this->checkStorageClass($this->handlers['storage']);
     }
@@ -804,7 +804,7 @@ public function getGroup() {
    * {@inheritdoc}
    */
   public function getGroupLabel() {
-    return !empty($this->group_label) ? $this->group_label : $this->t('Other', array(), array('context' => 'Entity type group'));
+    return !empty($this->group_label) ? $this->group_label : $this->t('Other', [], ['context' => 'Entity type group']);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/EntityTypeEventSubscriberTrait.php b/core/lib/Drupal/Core/Entity/EntityTypeEventSubscriberTrait.php
index 4f4213f7aafac1939e200267db2726a552f23719..98223ce044d775f0b569de28f29bd6f156159891 100644
--- a/core/lib/Drupal/Core/Entity/EntityTypeEventSubscriberTrait.php
+++ b/core/lib/Drupal/Core/Entity/EntityTypeEventSubscriberTrait.php
@@ -22,7 +22,7 @@ trait EntityTypeEventSubscriberTrait {
    * @see \Symfony\Component\EventDispatcher\EventSubscriberInterface::getSubscribedEvents()
    */
   public static function getEntityTypeEvents() {
-    $event = array('onEntityTypeEvent', 100);
+    $event = ['onEntityTypeEvent', 100];
     $events[EntityTypeEvents::CREATE][] = $event;
     $events[EntityTypeEvents::UPDATE][] = $event;
     $events[EntityTypeEvents::DELETE][] = $event;
diff --git a/core/lib/Drupal/Core/Entity/EntityTypeRepository.php b/core/lib/Drupal/Core/Entity/EntityTypeRepository.php
index 6d3d37627cc80c224afcdd54d93a88d322e21c90..d89b75e3ffce9c4db8293d27cc100205fbcd13a9 100644
--- a/core/lib/Drupal/Core/Entity/EntityTypeRepository.php
+++ b/core/lib/Drupal/Core/Entity/EntityTypeRepository.php
@@ -62,8 +62,8 @@ public function getEntityTypeLabels($group = FALSE) {
       }
 
       // Make sure that the 'Content' group is situated at the top.
-      $content = $this->t('Content', array(), array('context' => 'Entity type group'));
-      $options = array((string) $content => $options[(string) $content]) + $options;
+      $content = $this->t('Content', [], ['context' => 'Entity type group']);
+      $options = [(string) $content => $options[(string) $content]] + $options;
     }
 
     return $options;
diff --git a/core/lib/Drupal/Core/Entity/EntityViewBuilder.php b/core/lib/Drupal/Core/Entity/EntityViewBuilder.php
index 1b3e6c0fbbe1e3c301541f173cf0a17eb88fba9b..2c3340ec54f0478080fd956b6b53f6c3dbe22fbf 100644
--- a/core/lib/Drupal/Core/Entity/EntityViewBuilder.php
+++ b/core/lib/Drupal/Core/Entity/EntityViewBuilder.php
@@ -108,14 +108,14 @@ public static function createInstance(ContainerInterface $container, EntityTypeI
    * {@inheritdoc}
    */
   public function view(EntityInterface $entity, $view_mode = 'full', $langcode = NULL) {
-    $build_list = $this->viewMultiple(array($entity), $view_mode, $langcode);
+    $build_list = $this->viewMultiple([$entity], $view_mode, $langcode);
 
     // The default ::buildMultiple() #pre_render callback won't run, because we
     // extract a child element of the default renderable array. Thus we must
     // assign an alternative #pre_render callback that applies the necessary
     // transformations and then still calls ::buildMultiple().
     $build = $build_list[0];
-    $build['#pre_render'][] = array($this, 'build');
+    $build['#pre_render'][] = [$this, 'build'];
 
     return $build;
   }
@@ -123,11 +123,11 @@ public function view(EntityInterface $entity, $view_mode = 'full', $langcode = N
   /**
    * {@inheritdoc}
    */
-  public function viewMultiple(array $entities = array(), $view_mode = 'full', $langcode = NULL) {
-    $build_list = array(
+  public function viewMultiple(array $entities = [], $view_mode = 'full', $langcode = NULL) {
+    $build_list = [
       '#sorted' => TRUE,
-      '#pre_render' => array(array($this, 'buildMultiple')),
-    );
+      '#pre_render' => [[$this, 'buildMultiple']],
+    ];
     $weight = 0;
     foreach ($entities as $key => $entity) {
       // Ensure that from now on we are dealing with the proper translation
@@ -137,7 +137,7 @@ public function viewMultiple(array $entities = array(), $view_mode = 'full', $la
       // Set build defaults.
       $build_list[$key] = $this->getBuildDefaults($entity, $view_mode);
       $entityType = $this->entityTypeId;
-      $this->moduleHandler()->alter(array($entityType . '_build_defaults', 'entity_build_defaults'), $build_list[$key], $entity, $view_mode);
+      $this->moduleHandler()->alter([$entityType . '_build_defaults', 'entity_build_defaults'], $build_list[$key], $entity, $view_mode);
 
       $build_list[$key]['#weight'] = $weight++;
     }
@@ -160,16 +160,16 @@ protected function getBuildDefaults(EntityInterface $entity, $view_mode) {
     $context = [];
     $this->moduleHandler()->alter('entity_view_mode', $view_mode, $entity, $context);
 
-    $build = array(
+    $build = [
       "#{$this->entityTypeId}" => $entity,
       '#view_mode' => $view_mode,
       // Collect cache defaults for this entity.
-      '#cache' => array(
+      '#cache' => [
         'tags' => Cache::mergeTags($this->getCacheTags(), $entity->getCacheTags()),
         'contexts' => $entity->getCacheContexts(),
         'max-age' => $entity->getCacheMaxAge(),
-      ),
-    );
+      ],
+    ];
 
     // Add the default #theme key if a template exists for it.
     if ($this->themeRegistry->getRuntime()->has($this->entityTypeId)) {
@@ -179,15 +179,15 @@ protected function getBuildDefaults(EntityInterface $entity, $view_mode) {
     // Cache the rendered output if permitted by the view mode and global entity
     // type configuration.
     if ($this->isViewModeCacheable($view_mode) && !$entity->isNew() && $entity->isDefaultRevision() && $this->entityType->isRenderCacheable()) {
-      $build['#cache'] += array(
-        'keys' => array(
+      $build['#cache'] += [
+        'keys' => [
           'entity_view',
           $this->entityTypeId,
           $entity->id(),
           $view_mode,
-        ),
+        ],
         'bin' => $this->cacheBin,
-      );
+      ];
 
       if ($entity instanceof TranslatableInterface && count($entity->getTranslationLanguages()) > 1) {
         $build['#cache']['keys'][] = $entity->language()->getId();
@@ -241,7 +241,7 @@ public function build(array $build) {
    */
   public function buildMultiple(array $build_list) {
     // Build the view modes and display objects.
-    $view_modes = array();
+    $view_modes = [];
     $entity_type_key = "#{$this->entityTypeId}";
     $view_hook = "{$this->entityTypeId}_view";
 
@@ -282,7 +282,7 @@ public function buildMultiple(array $build_list) {
         }
 
         // Allow modules to modify the render array.
-        $this->moduleHandler()->alter(array($view_hook, 'entity_view'), $build_list[$key], $entity, $display);
+        $this->moduleHandler()->alter([$view_hook, 'entity_view'], $build_list[$key], $entity, $display);
       }
     }
 
@@ -293,7 +293,7 @@ public function buildMultiple(array $build_list) {
    * {@inheritdoc}
    */
   public function buildComponents(array &$build, array $entities, array $displays, $view_mode) {
-    $entities_by_bundle = array();
+    $entities_by_bundle = [];
     foreach ($entities as $id => $entity) {
       // Initialize the field item attributes for the fields being displayed.
       // The entity can include fields that are not displayed, and the display
@@ -304,7 +304,7 @@ public function buildComponents(array &$build, array $entities, array $displays,
       foreach ($displays[$entity->bundle()]->getComponents() as $name => $options) {
         if ($entity->hasField($name)) {
           foreach ($entity->get($name) as $item) {
-            $item->_attributes = array();
+            $item->_attributes = [];
           }
         }
       }
@@ -313,7 +313,7 @@ public function buildComponents(array &$build, array $entities, array $displays,
     }
 
     // Invoke hook_entity_prepare_view().
-    $this->moduleHandler()->invokeAll('entity_prepare_view', array($this->entityTypeId, $entities, $displays, $view_mode));
+    $this->moduleHandler()->invokeAll('entity_prepare_view', [$this->entityTypeId, $entities, $displays, $view_mode]);
 
     // Let the displays build their render arrays.
     foreach ($entities_by_bundle as $bundle => $bundle_entities) {
@@ -343,7 +343,7 @@ protected function alterBuild(array &$build, EntityInterface $entity, EntityView
    * {@inheritdoc}
    */
   public function getCacheTags() {
-    return array($this->entityTypeId . '_view');
+    return [$this->entityTypeId . '_view'];
   }
 
   /**
@@ -394,12 +394,12 @@ protected function isViewModeCacheable($view_mode) {
   /**
    * {@inheritdoc}
    */
-  public function viewField(FieldItemListInterface $items, $display_options = array()) {
+  public function viewField(FieldItemListInterface $items, $display_options = []) {
     $entity = $items->getEntity();
     $field_name = $items->getFieldDefinition()->getName();
     $display = $this->getSingleFieldDisplay($entity, $field_name, $display_options);
 
-    $output = array();
+    $output = [];
     $build = $display->build($entity);
     if (isset($build[$field_name])) {
       $output = $build[$field_name];
@@ -411,7 +411,7 @@ public function viewField(FieldItemListInterface $items, $display_options = arra
   /**
    * {@inheritdoc}
    */
-  public function viewFieldItem(FieldItemInterface $item, $display = array()) {
+  public function viewFieldItem(FieldItemInterface $item, $display = []) {
     $entity = $item->getEntity();
     $field_name = $item->getFieldDefinition()->getName();
 
@@ -420,11 +420,11 @@ public function viewFieldItem(FieldItemInterface $item, $display = array()) {
 
     // Push the item as the single value for the field, and defer to viewField()
     // to build the render array for the whole list.
-    $clone->{$field_name}->setValue(array($item->getValue()));
+    $clone->{$field_name}->setValue([$item->getValue()]);
     $elements = $this->viewField($clone->{$field_name}, $display);
 
     // Extract the part of the render array we need.
-    $output = isset($elements[0]) ? $elements[0] : array();
+    $output = isset($elements[0]) ? $elements[0] : [];
     if (isset($elements['#access'])) {
       $output['#access'] = $elements['#access'];
     }
@@ -465,11 +465,11 @@ protected function getSingleFieldDisplay($entity, $field_name, $display_options)
       $bundle = $entity->bundle();
       $key = $entity_type_id . ':' . $bundle . ':' . $field_name . ':' . Crypt::hashBase64(serialize($display_options));
       if (!isset($this->singleFieldDisplays[$key])) {
-        $this->singleFieldDisplays[$key] = EntityViewDisplay::create(array(
+        $this->singleFieldDisplays[$key] = EntityViewDisplay::create([
           'targetEntityType' => $entity_type_id,
           'bundle' => $bundle,
           'status' => TRUE,
-        ))->setComponent($field_name, $display_options);
+        ])->setComponent($field_name, $display_options);
       }
       $display = $this->singleFieldDisplays[$key];
     }
diff --git a/core/lib/Drupal/Core/Entity/EntityViewBuilderInterface.php b/core/lib/Drupal/Core/Entity/EntityViewBuilderInterface.php
index b86b5922c18c8bcd76da29eeb0b8489905079450..3da44873079f6c231d130ca5cb393e15d14f3679 100644
--- a/core/lib/Drupal/Core/Entity/EntityViewBuilderInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityViewBuilderInterface.php
@@ -70,7 +70,7 @@ public function view(EntityInterface $entity, $view_mode = 'full', $langcode = N
    *   comments belongs to, or not passing one, and having the comments node not
    *   be available for loading.
    */
-  public function viewMultiple(array $entities = array(), $view_mode = 'full', $langcode = NULL);
+  public function viewMultiple(array $entities = [], $view_mode = 'full', $langcode = NULL);
 
   /**
    * Resets the entity render cache.
@@ -122,7 +122,7 @@ public function resetCache(array $entities = NULL);
    *
    * @see \Drupal\Core\Entity\EntityViewBuilderInterface::viewFieldItem()
    */
-  public function viewField(FieldItemListInterface $items, $display_options = array());
+  public function viewField(FieldItemListInterface $items, $display_options = []);
 
   /**
    * Builds a renderable array for a single field item.
@@ -138,7 +138,7 @@ public function viewField(FieldItemListInterface $items, $display_options = arra
    *
    * @see \Drupal\Core\Entity\EntityViewBuilderInterface::viewField()
    */
-  public function viewFieldItem(FieldItemInterface $item, $display_options = array());
+  public function viewFieldItem(FieldItemInterface $item, $display_options = []);
 
   /**
    * The cache tag associated with this entity view builder.
diff --git a/core/lib/Drupal/Core/Entity/Event/BundleConfigImportValidate.php b/core/lib/Drupal/Core/Entity/Event/BundleConfigImportValidate.php
index 680c0e32ca45147bcc03702b6d4e6ba147f99894..03ef29c583420ed0551e60499b5661e034b98899 100644
--- a/core/lib/Drupal/Core/Entity/Event/BundleConfigImportValidate.php
+++ b/core/lib/Drupal/Core/Entity/Event/BundleConfigImportValidate.php
@@ -64,7 +64,7 @@ public function onConfigImporterValidate(ConfigImporterEvent $event) {
             ->execute();
           if (!empty($entity_ids)) {
             $entity = $this->entityManager->getStorage($entity_type_id)->load($bundle_id);
-            $event->getConfigImporter()->logError($this->t('Entities exist of type %entity_type and %bundle_label %bundle. These entities need to be deleted before importing.', array('%entity_type' => $bundle_of_entity_type->getLabel(), '%bundle_label' => $bundle_of_entity_type->getBundleLabel(), '%bundle' => $entity->label())));
+            $event->getConfigImporter()->logError($this->t('Entities exist of type %entity_type and %bundle_label %bundle. These entities need to be deleted before importing.', ['%entity_type' => $bundle_of_entity_type->getLabel(), '%bundle_label' => $bundle_of_entity_type->getBundleLabel(), '%bundle' => $entity->label()]));
           }
         }
       }
diff --git a/core/lib/Drupal/Core/Entity/KeyValueStore/KeyValueEntityStorage.php b/core/lib/Drupal/Core/Entity/KeyValueStore/KeyValueEntityStorage.php
index 478bca758e83b196630c594ea45ee96d3bcf18b8..de77e09d20f3ac94492900e3a65516592e1fdb1b 100644
--- a/core/lib/Drupal/Core/Entity/KeyValueStore/KeyValueEntityStorage.php
+++ b/core/lib/Drupal/Core/Entity/KeyValueStore/KeyValueEntityStorage.php
@@ -86,9 +86,9 @@ public static function createInstance(ContainerInterface $container, EntityTypeI
   /**
    * {@inheritdoc}
    */
-  public function doCreate(array $values = array()) {
+  public function doCreate(array $values = []) {
     // Set default language to site default if not provided.
-    $values += array($this->getEntityType()->getKey('langcode') => $this->languageManager->getDefaultLanguage()->getId());
+    $values += [$this->getEntityType()->getKey('langcode') => $this->languageManager->getDefaultLanguage()->getId()];
     $entity = new $this->entityClass($values, $this->entityTypeId);
 
     // @todo This is handled by ContentEntityStorageBase, which assumes
diff --git a/core/lib/Drupal/Core/Entity/Plugin/DataType/Deriver/EntityDeriver.php b/core/lib/Drupal/Core/Entity/Plugin/DataType/Deriver/EntityDeriver.php
index 5242e8db4aa2277c5942bf1edc83c0d273bfccb5..98be20e04ea9cd792c2bfabf4672ce77400ffe17 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/DataType/Deriver/EntityDeriver.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/DataType/Deriver/EntityDeriver.php
@@ -17,7 +17,7 @@ class EntityDeriver implements ContainerDeriverInterface {
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * The base plugin ID this derivative is for.
@@ -86,18 +86,18 @@ public function getDerivativeDefinitions($base_plugin_definition) {
     $this->derivatives[''] = $base_plugin_definition;
     // Add definitions for each entity type and bundle.
     foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
-      $this->derivatives[$entity_type_id] = array(
+      $this->derivatives[$entity_type_id] = [
         'label' => $entity_type->getLabel(),
         'constraints' => $entity_type->getConstraints(),
-      ) + $base_plugin_definition;
+      ] + $base_plugin_definition;
 
       // Incorporate the bundles as entity:$entity_type:$bundle, if any.
       foreach ($this->bundleInfoService->getBundleInfo($entity_type_id) as $bundle => $bundle_info) {
         if ($bundle !== $entity_type_id) {
-          $this->derivatives[$entity_type_id . ':' . $bundle] = array(
+          $this->derivatives[$entity_type_id . ':' . $bundle] = [
             'label' => $bundle_info['label'],
             'constraints' => $this->derivatives[$entity_type_id]['constraints']
-          ) + $base_plugin_definition;
+          ] + $base_plugin_definition;
         }
       }
     }
diff --git a/core/lib/Drupal/Core/Entity/Plugin/DataType/EntityAdapter.php b/core/lib/Drupal/Core/Entity/Plugin/DataType/EntityAdapter.php
index 2a9f1728dba90b9665a2359c0e1d1fb94b01928f..eafb6d88bfbffc0867158100dd963ede27671817 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/DataType/EntityAdapter.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/DataType/EntityAdapter.php
@@ -113,7 +113,7 @@ public function getProperties($include_computed = FALSE) {
     if (!$this->entity instanceof FieldableEntityInterface) {
       // @todo: Add support for config entities in
       // https://www.drupal.org/node/1818574.
-      return array();
+      return [];
     }
     return $this->entity->getFields($include_computed);
   }
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Derivative/DefaultSelectionDeriver.php b/core/lib/Drupal/Core/Entity/Plugin/Derivative/DefaultSelectionDeriver.php
index 7877289e539e6cf06f563f25dbb62fa45fe8892a..d8d21fdbef2f11e8a40a365eaab17d19eeea0496 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Derivative/DefaultSelectionDeriver.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Derivative/DefaultSelectionDeriver.php
@@ -50,8 +50,8 @@ public static function create(ContainerInterface $container, $base_plugin_id) {
   public function getDerivativeDefinitions($base_plugin_definition) {
     foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
       $this->derivatives[$entity_type_id] = $base_plugin_definition;
-      $this->derivatives[$entity_type_id]['entity_types'] = array($entity_type_id);
-      $this->derivatives[$entity_type_id]['label'] = t('@entity_type selection', array('@entity_type' => $entity_type->getLabel()));
+      $this->derivatives[$entity_type_id]['entity_types'] = [$entity_type_id];
+      $this->derivatives[$entity_type_id]['label'] = t('@entity_type selection', ['@entity_type' => $entity_type->getLabel()]);
       $this->derivatives[$entity_type_id]['base_plugin_label'] = (string) $base_plugin_definition['label'];
 
       // If the entity type doesn't provide a 'label' key in its plugin
diff --git a/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/Broken.php b/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/Broken.php
index d74fb6e11a2600af940c9b7c9405eafdae54b20a..f53eeb618902a091e556e6521faca9ecb707ce18 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/Broken.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/Broken.php
@@ -20,9 +20,9 @@ class Broken implements SelectionInterface {
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['selection_handler'] = array(
+    $form['selection_handler'] = [
       '#markup' => t('The selected selection handler is broken.'),
-    );
+    ];
     return $form;
   }
 
@@ -40,7 +40,7 @@ public function submitConfigurationForm(array &$form, FormStateInterface $form_s
    * {@inheritdoc}
    */
   public function getReferenceableEntities($match = NULL, $match_operator = 'CONTAINS', $limit = 0) {
-    return array();
+    return [];
   }
 
   /**
@@ -54,7 +54,7 @@ public function countReferenceableEntities($match = NULL, $match_operator = 'CON
    * {@inheritdoc}
    */
   public function validateReferenceableEntities(array $ids) {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php b/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php
index d924e1ae1375aaee4c10febb8c60439214ffbee2..e3b41b1bbe36c6978e631a7d19b6b5c8d4462dee 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php
@@ -109,26 +109,26 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $bundles = $this->entityManager->getBundleInfo($entity_type_id);
 
     // Merge-in default values.
-    $selection_handler_settings += array(
+    $selection_handler_settings += [
       // For the 'target_bundles' setting, a NULL value is equivalent to "allow
       // entities from any bundle to be referenced" and an empty array value is
       // equivalent to "no entities from any bundle can be referenced".
       'target_bundles' => NULL,
-      'sort' => array(
+      'sort' => [
         'field' => '_none',
-      ),
+      ],
       'auto_create' => FALSE,
       'auto_create_bundle' => NULL,
-    );
+    ];
 
     if ($entity_type->hasKey('bundle')) {
-      $bundle_options = array();
+      $bundle_options = [];
       foreach ($bundles as $bundle_name => $bundle_info) {
         $bundle_options[$bundle_name] = $bundle_info['label'];
       }
       natsort($bundle_options);
 
-      $form['target_bundles'] = array(
+      $form['target_bundles'] = [
         '#type' => 'checkboxes',
         '#title' => $this->t('Bundles'),
         '#options' => $bundle_options,
@@ -139,7 +139,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
         '#element_validate' => [[get_class($this), 'elementValidateFilter']],
         '#ajax' => TRUE,
         '#limit_validation_errors' => [],
-      );
+      ];
 
       $form['target_bundles_update'] = [
         '#type' => 'submit',
@@ -152,14 +152,14 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
       ];
     }
     else {
-      $form['target_bundles'] = array(
+      $form['target_bundles'] = [
         '#type' => 'value',
-        '#value' => array(),
-      );
+        '#value' => [],
+      ];
     }
 
     if ($entity_type->entityClassImplements(FieldableEntityInterface::class)) {
-      $fields = array();
+      $fields = [];
       foreach (array_keys($bundles) as $bundle) {
         $bundle_fields = array_filter($this->entityManager->getFieldDefinitions($entity_type_id, $bundle), function ($field_definition) {
           return !$field_definition->isComputed();
@@ -172,57 +172,57 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
           // @todo: Use property labels instead of the column name.
           if (count($columns) > 1) {
             foreach ($columns as $column_name => $column_info) {
-              $fields[$field_name . '.' . $column_name] = $this->t('@label (@column)', array('@label' => $field_definition->getLabel(), '@column' => $column_name));
+              $fields[$field_name . '.' . $column_name] = $this->t('@label (@column)', ['@label' => $field_definition->getLabel(), '@column' => $column_name]);
             }
           }
           else {
-            $fields[$field_name] = $this->t('@label', array('@label' => $field_definition->getLabel()));
+            $fields[$field_name] = $this->t('@label', ['@label' => $field_definition->getLabel()]);
           }
         }
       }
 
-      $form['sort']['field'] = array(
+      $form['sort']['field'] = [
         '#type' => 'select',
         '#title' => $this->t('Sort by'),
-        '#options' => array(
+        '#options' => [
           '_none' => $this->t('- None -'),
-        ) + $fields,
+        ] + $fields,
         '#ajax' => TRUE,
-        '#limit_validation_errors' => array(),
+        '#limit_validation_errors' => [],
         '#default_value' => $selection_handler_settings['sort']['field'],
-      );
+      ];
 
-      $form['sort']['settings'] = array(
+      $form['sort']['settings'] = [
         '#type' => 'container',
-        '#attributes' => array('class' => array('entity_reference-settings')),
+        '#attributes' => ['class' => ['entity_reference-settings']],
         '#process' => [[EntityReferenceItem::class, 'formProcessMergeParent']],
-      );
+      ];
 
       if ($selection_handler_settings['sort']['field'] != '_none') {
         // Merge-in default values.
-        $selection_handler_settings['sort'] += array(
+        $selection_handler_settings['sort'] += [
           'direction' => 'ASC',
-        );
+        ];
 
-        $form['sort']['settings']['direction'] = array(
+        $form['sort']['settings']['direction'] = [
           '#type' => 'select',
           '#title' => $this->t('Sort direction'),
           '#required' => TRUE,
-          '#options' => array(
+          '#options' => [
             'ASC' => $this->t('Ascending'),
             'DESC' => $this->t('Descending'),
-          ),
+          ],
           '#default_value' => $selection_handler_settings['sort']['direction'],
-        );
+        ];
       }
     }
 
-    $form['auto_create'] = array(
+    $form['auto_create'] = [
       '#type' => 'checkbox',
       '#title' => $this->t("Create referenced entities if they don't already exist"),
       '#default_value' => $selection_handler_settings['auto_create'],
       '#weight' => -2,
-    );
+    ];
 
     if ($entity_type->hasKey('bundle')) {
       $bundles = array_intersect_key($bundle_options, array_filter((array) $selection_handler_settings['target_bundles']));
@@ -288,10 +288,10 @@ public function getReferenceableEntities($match = NULL, $match_operator = 'CONTA
     $result = $query->execute();
 
     if (empty($result)) {
-      return array();
+      return [];
     }
 
-    $options = array();
+    $options = [];
     $entities = $this->entityManager->getStorage($target_type)->loadMultiple($result);
     foreach ($entities as $entity_id => $entity) {
       $bundle = $entity->bundle();
@@ -315,7 +315,7 @@ public function countReferenceableEntities($match = NULL, $match_operator = 'CON
    * {@inheritdoc}
    */
   public function validateReferenceableEntities(array $ids) {
-    $result = array();
+    $result = [];
     if ($ids) {
       $target_type = $this->configuration['target_type'];
       $entity_type = $this->entityManager->getDefinition($target_type);
@@ -336,10 +336,10 @@ public function createNewEntity($entity_type_id, $bundle, $label, $uid) {
     $bundle_key = $entity_type->getKey('bundle');
     $label_key = $entity_type->getKey('label');
 
-    $entity = $this->entityManager->getStorage($entity_type_id)->create(array(
+    $entity = $this->entityManager->getStorage($entity_type_id)->create([
       $bundle_key => $bundle,
       $label_key => $label,
-    ));
+    ]);
 
     if ($entity instanceof EntityOwnerInterface) {
       $entity->setOwnerId($uid);
@@ -433,9 +433,9 @@ protected function reAlterQuery(AlterableInterface $query, $tag, $base_table) {
     $old_tags = $query->alterTags;
     $old_metadata = $query->alterMetaData;
 
-    $query->alterTags = array($tag => TRUE);
+    $query->alterTags = [$tag => TRUE];
     $query->alterMetaData['base_table'] = $base_table;
-    $this->moduleHandler->alter(array('query', 'query_' . $tag), $query);
+    $this->moduleHandler->alter(['query', 'query_' . $tag], $query);
 
     // Restore the tags and metadata.
     $query->alterTags = $old_tags;
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraint.php b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraint.php
index 513213feb7bcf33783451e9f2f33b19d3072106f..161e9f2f6b1ff29ba720ed34476e94f3cec7c997 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraint.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraint.php
@@ -37,7 +37,7 @@ class BundleConstraint extends Constraint {
   public function getBundleOption() {
     // Support passing the bundle as string, but force it to be an array.
     if (!is_array($this->bundle)) {
-      $this->bundle = array($this->bundle);
+      $this->bundle = [$this->bundle];
     }
     return $this->bundle;
   }
@@ -53,7 +53,7 @@ public function getDefaultOption() {
    * {@inheritdoc}
    */
   public function getRequiredOptions() {
-    return array('bundle');
+    return ['bundle'];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraintValidator.php b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraintValidator.php
index 0a0988976be38a9f77b47d567d1d4643d7f8fac1..39e99afc5e2b450d8063068a0c29b3e41fefbf90 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraintValidator.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraintValidator.php
@@ -19,7 +19,7 @@ public function validate($entity, Constraint $constraint) {
     }
 
     if (!in_array($entity->bundle(), $constraint->getBundleOption())) {
-      $this->context->addViolation($constraint->message, array('%bundle' => implode(', ', $constraint->getBundleOption())));
+      $this->context->addViolation($constraint->message, ['%bundle' => implode(', ', $constraint->getBundleOption())]);
     }
   }
 
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraint.php b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraint.php
index c9f2d815950bf83d6ccfe458d8af5abc8e814720..c39152f2aa31d61532988a59de2b693e9a4de6b1 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraint.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraint.php
@@ -40,7 +40,7 @@ public function getDefaultOption() {
    * {@inheritdoc}
    */
   public function getRequiredOptions() {
-    return array('type');
+    return ['type'];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraintValidator.php b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraintValidator.php
index 5d2b86258821281efbe0f6d7b101b054265f8601..89c5e8ead72ecc73e51e92b16ad72ecc25ec3f0e 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraintValidator.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraintValidator.php
@@ -20,7 +20,7 @@ public function validate($entity, Constraint $constraint) {
 
     /** @var $entity \Drupal\Core\Entity\EntityInterface */
     if ($entity->getEntityTypeId() != $constraint->type) {
-      $this->context->addViolation($constraint->message, array('%type' => $constraint->type));
+      $this->context->addViolation($constraint->message, ['%type' => $constraint->type]);
     }
   }
 
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/ReferenceAccessConstraintValidator.php b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/ReferenceAccessConstraintValidator.php
index c57478197bbe5dcc3abeabae907df51a9c5fdae0..7860c90d6542a62c6625f309a645647bf9d5099a 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/ReferenceAccessConstraintValidator.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/ReferenceAccessConstraintValidator.php
@@ -43,7 +43,7 @@ public function validate($value, Constraint $constraint) {
       // referenced entity.
       if ($check_permission && !$referenced_entity->access('view')) {
         $type = $value->getFieldDefinition()->getSetting('target_type');
-        $this->context->addViolation($constraint->message, array('%type' => $type, '%id' => $id));
+        $this->context->addViolation($constraint->message, ['%type' => $type, '%id' => $id]);
       }
     }
   }
diff --git a/core/lib/Drupal/Core/Entity/Query/ConditionAggregateBase.php b/core/lib/Drupal/Core/Entity/Query/ConditionAggregateBase.php
index 50884db203998de3b0a650c972e074eb547d6e48..27ec70ce98bebd9a896acb8fae9fec1c586ba00c 100644
--- a/core/lib/Drupal/Core/Entity/Query/ConditionAggregateBase.php
+++ b/core/lib/Drupal/Core/Entity/Query/ConditionAggregateBase.php
@@ -11,13 +11,13 @@ abstract class ConditionAggregateBase extends ConditionFundamentals implements C
    * {@inheritdoc}
    */
   public function condition($field, $function = NULL, $value = NULL, $operator = NULL, $langcode = NULL) {
-    $this->conditions[] = array(
+    $this->conditions[] = [
       'field' => $field,
       'function' => $function,
       'value' => $value,
       'operator' => $operator,
       'langcode' => $langcode,
-    );
+    ];
 
     return $this;
   }
diff --git a/core/lib/Drupal/Core/Entity/Query/ConditionBase.php b/core/lib/Drupal/Core/Entity/Query/ConditionBase.php
index 4393935c15efcf2029bcd5754afd006ef6b76350..030f51dc3ac59436dedbb0a64fd497347f5b4f5e 100644
--- a/core/lib/Drupal/Core/Entity/Query/ConditionBase.php
+++ b/core/lib/Drupal/Core/Entity/Query/ConditionBase.php
@@ -11,12 +11,12 @@ abstract class ConditionBase extends ConditionFundamentals implements ConditionI
    * {@inheritdoc}
    */
   public function condition($field, $value = NULL, $operator = NULL, $langcode = NULL) {
-    $this->conditions[] = array(
+    $this->conditions[] = [
       'field' => $field,
       'value' => $value,
       'operator' => $operator,
       'langcode' => $langcode,
-    );
+    ];
 
     return $this;
   }
diff --git a/core/lib/Drupal/Core/Entity/Query/ConditionFundamentals.php b/core/lib/Drupal/Core/Entity/Query/ConditionFundamentals.php
index 980d83e60e87c0b358bc2e3c84ba80522822e6d1..d03e2b2e8109499a10f2a08033cb1f426ac1f151 100644
--- a/core/lib/Drupal/Core/Entity/Query/ConditionFundamentals.php
+++ b/core/lib/Drupal/Core/Entity/Query/ConditionFundamentals.php
@@ -12,7 +12,7 @@ abstract class ConditionFundamentals {
    *
    * @var array
    */
-  protected $conditions = array();
+  protected $conditions = [];
 
   /**
    * The conjunction of this condition group. The value is one of the following:
@@ -36,7 +36,7 @@ abstract class ConditionFundamentals {
    *
    * @var array
    */
-  protected $namespaces = array();
+  protected $namespaces = [];
 
   /**
    * Constructs a Condition object.
diff --git a/core/lib/Drupal/Core/Entity/Query/QueryBase.php b/core/lib/Drupal/Core/Entity/Query/QueryBase.php
index 227d90c513212277d28c492aa4cdf486002cec00..f805747e9cf5acc05473a16bd2e6435d9bceeb4e 100644
--- a/core/lib/Drupal/Core/Entity/Query/QueryBase.php
+++ b/core/lib/Drupal/Core/Entity/Query/QueryBase.php
@@ -29,7 +29,7 @@ abstract class QueryBase implements QueryInterface {
    *
    * @var array
    */
-  protected $sort = array();
+  protected $sort = [];
 
   /**
    * TRUE if this is a count query, FALSE if it isn't.
@@ -50,14 +50,14 @@ abstract class QueryBase implements QueryInterface {
    *
    * @var array
    */
-  protected $aggregate = array();
+  protected $aggregate = [];
 
   /**
    * The list of columns to group on.
    *
    * @var array
    */
-  protected $groupBy = array();
+  protected $groupBy = [];
 
   /**
    * Aggregate Conditions
@@ -71,14 +71,14 @@ abstract class QueryBase implements QueryInterface {
    *
    * @var array
    */
-  protected $sortAggregate = array();
+  protected $sortAggregate = [];
 
   /**
    * The query range.
    *
    * @var array
    */
-  protected $range = array();
+  protected $range = [];
 
   /**
    * The query metadata for alter purposes.
@@ -115,14 +115,14 @@ abstract class QueryBase implements QueryInterface {
    *
    * @see Query::pager()
    */
-  protected $pager = array();
+  protected $pager = [];
 
   /**
    * List of potential namespaces of the classes belonging to this query.
    *
    * @var array
    */
-  protected $namespaces = array();
+  protected $namespaces = [];
 
   /**
    * Constructs this object.
@@ -181,10 +181,10 @@ public function notExists($property, $langcode = NULL) {
    * {@inheritdoc}
    */
   public function range($start = NULL, $length = NULL) {
-    $this->range = array(
+    $this->range = [
       'start' => $start,
       'length' => $length,
-    );
+    ];
     return $this;
   }
 
@@ -223,11 +223,11 @@ public function orConditionGroup() {
    * {@inheritdoc}
    */
   public function sort($field, $direction = 'ASC', $langcode = NULL) {
-    $this->sort[] = array(
+    $this->sort[] = [
       'field' => $field,
       'direction' => strtoupper($direction),
       'langcode' => $langcode,
-    );
+    ];
     return $this;
   }
 
@@ -276,10 +276,10 @@ public function pager($limit = 10, $element = NULL) {
       PagerSelectExtender::$maxElement = $element + 1;
     }
 
-    $this->pager = array(
+    $this->pager = [
       'limit' => $limit,
       'element' => $element,
-    );
+    ];
     return $this;
   }
 
@@ -381,12 +381,12 @@ public function aggregate($field, $function, $langcode = NULL, &$alias = NULL) {
       $alias = $this->getAggregationAlias($field, $function);
     }
 
-    $this->aggregate[$alias] = array(
+    $this->aggregate[$alias] = [
       'field' => $field,
       'function' => $function,
       'alias' => $alias,
       'langcode' => $langcode,
-    );
+    ];
 
     return $this;
   }
@@ -407,12 +407,12 @@ public function conditionAggregate($field, $function = NULL, $value = NULL, $ope
   public function sortAggregate($field, $function, $direction = 'ASC', $langcode = NULL) {
     $alias = $this->getAggregationAlias($field, $function);
 
-    $this->sortAggregate[$alias] = array(
+    $this->sortAggregate[$alias] = [
       'field' => $field,
       'function' => $function,
       'direction' => $direction,
       'langcode' => $langcode,
-    );
+    ];
     $this->aggregate($field, $function, $langcode, $alias);
 
     return $this;
@@ -422,10 +422,10 @@ public function sortAggregate($field, $function, $direction = 'ASC', $langcode =
    * {@inheritdoc}
    */
   public function groupBy($field, $langcode = NULL) {
-    $this->groupBy[] = array(
+    $this->groupBy[] = [
       'field' => $field,
       'langcode' => $langcode,
-    );
+    ];
 
     return $this;
   }
@@ -456,7 +456,7 @@ protected function getAggregationAlias($field, $function) {
    *   parent of the class and so on and so on.
    */
   public static function getNamespaces($object) {
-    $namespaces = array();
+    $namespaces = [];
     for ($class = get_class($object); $class; $class = get_parent_class($class)) {
       $namespaces[] = substr($class, 0, strrpos($class, '\\'));
     }
diff --git a/core/lib/Drupal/Core/Entity/Query/Sql/ConditionAggregate.php b/core/lib/Drupal/Core/Entity/Query/Sql/ConditionAggregate.php
index 7bdf793c645ba24c228f9e8ee06864e151f65f5b..f48ab65d878b7649b56bb0ee9233540428288173 100644
--- a/core/lib/Drupal/Core/Entity/Query/Sql/ConditionAggregate.php
+++ b/core/lib/Drupal/Core/Entity/Query/Sql/ConditionAggregate.php
@@ -39,7 +39,7 @@ public function compile($conditionContainer) {
         $condition_class::translateCondition($condition, $sql_query, $tables->isFieldCaseSensitive($condition['field']));
         $function = $condition['function'];
         $placeholder = ':db_placeholder_' . $conditionContainer->nextPlaceholder();
-        $conditionContainer->having("$function($field) {$condition['operator']} $placeholder", array($placeholder => $condition['value']));
+        $conditionContainer->having("$function($field) {$condition['operator']} $placeholder", [$placeholder => $condition['value']]);
       }
     }
   }
diff --git a/core/lib/Drupal/Core/Entity/Query/Sql/Query.php b/core/lib/Drupal/Core/Entity/Query/Sql/Query.php
index 78f831aff3fbdf8f3b8b1743af98bba2cc7098e7..cd245ef7b5284511a979f00ea05ef217b661783d 100644
--- a/core/lib/Drupal/Core/Entity/Query/Sql/Query.php
+++ b/core/lib/Drupal/Core/Entity/Query/Sql/Query.php
@@ -31,7 +31,7 @@ class Query extends QueryBase implements QueryInterface {
    *
    * @var array
    */
-  protected $sqlFields = array();
+  protected $sqlFields = [];
 
   /**
    * An array of strings added as to the group by, keyed by the string to avoid
@@ -39,7 +39,7 @@ class Query extends QueryBase implements QueryInterface {
    *
    * @var array
    */
-  protected $sqlGroupBy = array();
+  protected $sqlGroupBy = [];
 
   /**
    * @var \Drupal\Core\Database\Connection
@@ -101,23 +101,23 @@ protected function prepare() {
     if ($this->entityType->getDataTable()) {
       $simple_query = FALSE;
     }
-    $this->sqlQuery = $this->connection->select($base_table, 'base_table', array('conjunction' => $this->conjunction));
+    $this->sqlQuery = $this->connection->select($base_table, 'base_table', ['conjunction' => $this->conjunction]);
     $this->sqlQuery->addMetaData('entity_type', $this->entityTypeId);
     $id_field = $this->entityType->getKey('id');
     // Add the key field for fetchAllKeyed().
     if (!$revision_field = $this->entityType->getKey('revision')) {
       // When there is no revision support, the key field is the entity key.
-      $this->sqlFields["base_table.$id_field"] = array('base_table', $id_field);
+      $this->sqlFields["base_table.$id_field"] = ['base_table', $id_field];
       // Now add the value column for fetchAllKeyed(). This is always the
       // entity id.
-      $this->sqlFields["base_table.$id_field" . '_1'] = array('base_table', $id_field);
+      $this->sqlFields["base_table.$id_field" . '_1'] = ['base_table', $id_field];
     }
     else {
       // When there is revision support, the key field is the revision key.
-      $this->sqlFields["base_table.$revision_field"] = array('base_table', $revision_field);
+      $this->sqlFields["base_table.$revision_field"] = ['base_table', $revision_field];
       // Now add the value column for fetchAllKeyed(). This is always the
       // entity id.
-      $this->sqlFields["base_table.$id_field"] = array('base_table', $id_field);
+      $this->sqlFields["base_table.$id_field"] = ['base_table', $id_field];
     }
     if ($this->accessCheck) {
       $this->sqlQuery->addTag($this->entityTypeId . '_access');
@@ -164,12 +164,12 @@ protected function compile() {
    */
   protected function addSort() {
     if ($this->count) {
-      $this->sort = array();
+      $this->sort = [];
     }
     // Gather the SQL field aliases first to make sure every field table
     // necessary is added. This might change whether the query is simple or
     // not. See below for more on simple queries.
-    $sort = array();
+    $sort = [];
     if ($this->sort) {
       foreach ($this->sort as $key => $data) {
         $sort[$key] = $this->getSqlField($data['field'], $data['langcode']);
@@ -291,8 +291,8 @@ protected function isSimpleQuery() {
    */
   public function __clone() {
     parent::__clone();
-    $this->sqlFields = array();
-    $this->sqlGroupBy = array();
+    $this->sqlFields = [];
+    $this->sqlGroupBy = [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/Query/Sql/QueryAggregate.php b/core/lib/Drupal/Core/Entity/Query/Sql/QueryAggregate.php
index 0fa2f665237caad30a3d74258f9ab7dd01dceb4c..f8e42f05bcdfa0248ba6482323160654a6819ae8 100644
--- a/core/lib/Drupal/Core/Entity/Query/Sql/QueryAggregate.php
+++ b/core/lib/Drupal/Core/Entity/Query/Sql/QueryAggregate.php
@@ -15,7 +15,7 @@ class QueryAggregate extends Query implements QueryAggregateInterface {
    * @var array
    *   An array of expressions.
    */
-  protected $sqlExpressions = array();
+  protected $sqlExpressions = [];
 
   /**
    * {@inheritdoc}
@@ -39,7 +39,7 @@ public function execute() {
   public function prepare() {
     parent::prepare();
     // Throw away the id fields.
-    $this->sqlFields = array();
+    $this->sqlFields = [];
     return $this;
   }
 
@@ -105,7 +105,7 @@ protected function addGroupBy() {
       $sql_field = $this->getSqlField($field, $group_by['langcode']);
       $this->sqlGroupBy[$sql_field] = $sql_field;
       list($table, $real_sql_field) = explode('.', $sql_field);
-      $this->sqlFields[$sql_field] = array($table, $real_sql_field, $this->createSqlAlias($field, $real_sql_field));
+      $this->sqlFields[$sql_field] = [$table, $real_sql_field, $this->createSqlAlias($field, $real_sql_field)];
     }
 
     return $this;
@@ -170,7 +170,7 @@ protected function result() {
     if ($this->count) {
       return parent::result();
     }
-    $return = array();
+    $return = [];
     foreach ($this->sqlQuery->execute() as $row) {
       $return[] = (array)$row;
     }
diff --git a/core/lib/Drupal/Core/Entity/Query/Sql/Tables.php b/core/lib/Drupal/Core/Entity/Query/Sql/Tables.php
index e813cde38592f12d1d5883c013ff925ab5bb7ae3..e21824732736856649b9bd6d2e2c7651e15c2876 100644
--- a/core/lib/Drupal/Core/Entity/Query/Sql/Tables.php
+++ b/core/lib/Drupal/Core/Entity/Query/Sql/Tables.php
@@ -28,7 +28,7 @@ class Tables implements TablesInterface {
    *
    * @var array
    */
-  protected $entityTables = array();
+  protected $entityTables = [];
 
   /**
    * Field table array, key is table name, value is alias.
@@ -37,7 +37,7 @@ class Tables implements TablesInterface {
    *
    * @var array
    */
-  protected $fieldTables = array();
+  protected $fieldTables = [];
 
   /**
    * The entity manager.
@@ -51,7 +51,7 @@ class Tables implements TablesInterface {
    *
    * @var array
    */
-  protected $caseSensitiveFields = array();
+  protected $caseSensitiveFields = [];
 
   /**
    * @param \Drupal\Core\Database\Query\SelectInterface $sql_query
@@ -80,7 +80,7 @@ public function addField($field, $type, $langcode) {
     $count = count($specifiers) - 1;
     // This will contain the definitions of the last specifier seen by the
     // system.
-    $propertyDefinitions = array();
+    $propertyDefinitions = [];
     $entity_type = $this->entityManager->getDefinition($entity_type_id);
 
     $field_storage_definitions = $this->entityManager->getFieldStorageDefinitions($entity_type_id);
@@ -183,7 +183,7 @@ public function addField($field, $type, $langcode) {
         // queried from the data table or the base table based on where it
         // finds the property first. The data table is preferred, which is why
         // it gets added before the base table.
-        $entity_tables = array();
+        $entity_tables = [];
         if ($all_revisions && $field_storage && $field_storage->isRevisionable()) {
           $data_table = $entity_type->getRevisionDataTable();
           $entity_base_table = $entity_type->getRevisionTable();
@@ -274,7 +274,7 @@ public function addField($field, $type, $langcode) {
           $field_storage_definitions = $this->entityManager->getFieldStorageDefinitions($entity_type_id);
           // Add the new entity base table using the table and sql column.
           $base_table = $this->addNextBaseTable($entity_type, $table, $sql_column);
-          $propertyDefinitions = array();
+          $propertyDefinitions = [];
           $key++;
           $index_prefix .= "$next_index_prefix.";
         }
@@ -340,7 +340,7 @@ protected function ensureFieldTable($index_prefix, &$field, $type, $langcode, $b
   }
 
   protected function addJoin($type, $table, $join_condition, $langcode, $delta = NULL) {
-    $arguments = array();
+    $arguments = [];
     if ($langcode) {
       $entity_type_id = $this->sqlQuery->getMetaData('entity_type');
       $entity_type = $this->entityManager->getDefinition($entity_type_id);
diff --git a/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php b/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
index 5f20c3f08d87bea61100b5349468a485f9c20a79..4fd6a32dfbedbf7d86ae2620f7605db48cde8eb4 100644
--- a/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
+++ b/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
@@ -22,7 +22,7 @@ class DefaultTableMapping implements TableMappingInterface {
    *
    * @var \Drupal\Core\Field\FieldStorageDefinitionInterface[]
    */
-  protected $fieldStorageDefinitions = array();
+  protected $fieldStorageDefinitions = [];
 
   /**
    * A list of field names per table.
@@ -33,7 +33,7 @@ class DefaultTableMapping implements TableMappingInterface {
    *
    * @var array[]
    */
-  protected $fieldNames = array();
+  protected $fieldNames = [];
 
   /**
    * A list of database columns which store denormalized data per table.
@@ -44,7 +44,7 @@ class DefaultTableMapping implements TableMappingInterface {
    *
    * @var array[]
    */
-  protected $extraColumns = array();
+  protected $extraColumns = [];
 
   /**
    * A mapping of column names per field name.
@@ -58,7 +58,7 @@ class DefaultTableMapping implements TableMappingInterface {
    *
    * @var array[]
    */
-  protected $columnMapping = array();
+  protected $columnMapping = [];
 
   /**
    * A list of all database columns per table.
@@ -73,7 +73,7 @@ class DefaultTableMapping implements TableMappingInterface {
    *
    * @var array[]
    */
-  protected $allColumns = array();
+  protected $allColumns = [];
 
   /**
    * Constructs a DefaultTableMapping.
@@ -101,7 +101,7 @@ public function getTableNames() {
    */
   public function getAllColumns($table_name) {
     if (!isset($this->allColumns[$table_name])) {
-      $this->allColumns[$table_name] = array();
+      $this->allColumns[$table_name] = [];
 
       foreach ($this->getFieldNames($table_name) as $field_name) {
         $this->allColumns[$table_name] = array_merge($this->allColumns[$table_name], array_values($this->getColumnNames($field_name)));
@@ -128,7 +128,7 @@ public function getFieldNames($table_name) {
     if (isset($this->fieldNames[$table_name])) {
       return $this->fieldNames[$table_name];
     }
-    return array();
+    return [];
   }
 
   /**
@@ -148,15 +148,15 @@ public function getFieldTableName($field_name) {
       /** @var \Drupal\Core\Entity\Sql\SqlContentEntityStorage $storage */
       $storage = \Drupal::entityManager()->getStorage($this->entityType->id());
       $storage_definition = $this->fieldStorageDefinitions[$field_name];
-      $table_names = array(
+      $table_names = [
         $storage->getDataTable(),
         $storage->getBaseTable(),
         $storage->getRevisionTable(),
         $this->getDedicatedDataTableName($storage_definition),
-      );
+      ];
 
       // Collect field columns.
-      $field_columns = array();
+      $field_columns = [];
       foreach (array_keys($storage_definition->getColumns()) as $property_name) {
         $field_columns[] = $this->getFieldColumnName($storage_definition, $property_name);
       }
@@ -184,7 +184,7 @@ public function getFieldTableName($field_name) {
    */
   public function getColumnNames($field_name) {
     if (!isset($this->columnMapping[$field_name])) {
-      $this->columnMapping[$field_name] = array();
+      $this->columnMapping[$field_name] = [];
       if (isset($this->fieldStorageDefinitions[$field_name]) && !$this->fieldStorageDefinitions[$field_name]->hasCustomStorage()) {
         foreach (array_keys($this->fieldStorageDefinitions[$field_name]->getColumns()) as $property_name) {
           $this->columnMapping[$field_name][$property_name] = $this->getFieldColumnName($this->fieldStorageDefinitions[$field_name], $property_name);
@@ -242,7 +242,7 @@ public function getExtraColumns($table_name) {
     if (isset($this->extraColumns[$table_name])) {
       return $this->extraColumns[$table_name];
     }
-    return array();
+    return [];
   }
 
   /**
@@ -307,7 +307,7 @@ public function getDedicatedTableNames() {
    * {@inheritdoc}
    */
   public function getReservedColumns() {
-    return array('deleted');
+    return ['deleted'];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
index 5c03b65ce96009b89174a6314fa5da212af000ec..d696a947cfc32b25a73dedacb4e213d5d2ddfc7c 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
@@ -286,7 +286,7 @@ public function getTableMapping(array $storage_definitions = NULL) {
         return $table_mapping->allowsSharedTableStorage($definition);
       });
 
-      $key_fields = array_values(array_filter(array($this->idKey, $this->revisionKey, $this->bundleKey, $this->uuidKey, $this->langcodeKey)));
+      $key_fields = array_values(array_filter([$this->idKey, $this->revisionKey, $this->bundleKey, $this->uuidKey, $this->langcodeKey]));
       $all_fields = array_keys($shared_table_definitions);
       $revisionable_fields = array_keys(array_filter($shared_table_definitions, function (FieldStorageDefinitionInterface $definition) {
         return $definition->isRevisionable();
@@ -310,7 +310,7 @@ public function getTableMapping(array $storage_definitions = NULL) {
         // denormalized in the base table but also stored in the revision table
         // together with the entity ID and the revision ID as identifiers.
         $table_mapping->setFieldNames($this->baseTable, array_diff($all_fields, $revision_metadata_fields));
-        $revision_key_fields = array($this->idKey, $this->revisionKey);
+        $revision_key_fields = [$this->idKey, $this->revisionKey];
         $table_mapping->setFieldNames($this->revisionTable, array_merge($revision_key_fields, $revisionable_fields));
       }
       elseif (!$revisionable && $translatable) {
@@ -322,7 +322,7 @@ public function getTableMapping(array $storage_definitions = NULL) {
         // the data table.
         $table_mapping
           ->setFieldNames($this->baseTable, $key_fields)
-          ->setFieldNames($this->dataTable, array_values(array_diff($all_fields, array($this->uuidKey))));
+          ->setFieldNames($this->dataTable, array_values(array_diff($all_fields, [$this->uuidKey])));
       }
       elseif ($revisionable && $translatable) {
         // The revisionable multilingual layout stores key field values in the
@@ -337,14 +337,14 @@ public function getTableMapping(array $storage_definitions = NULL) {
         // Like in the multilingual, non-revisionable case the UUID is not
         // in the data table. Additionally, do not store revision metadata
         // fields in the data table.
-        $data_fields = array_values(array_diff($all_fields, array($this->uuidKey), $revision_metadata_fields));
+        $data_fields = array_values(array_diff($all_fields, [$this->uuidKey], $revision_metadata_fields));
         $table_mapping->setFieldNames($this->dataTable, $data_fields);
 
-        $revision_base_fields = array_merge(array($this->idKey, $this->revisionKey, $this->langcodeKey), $revision_metadata_fields);
+        $revision_base_fields = array_merge([$this->idKey, $this->revisionKey, $this->langcodeKey], $revision_metadata_fields);
         $table_mapping->setFieldNames($this->revisionTable, $revision_base_fields);
 
-        $revision_data_key_fields = array($this->idKey, $this->revisionKey, $this->langcodeKey);
-        $revision_data_fields = array_diff($revisionable_fields, $revision_metadata_fields, array($this->langcodeKey));
+        $revision_data_key_fields = [$this->idKey, $this->revisionKey, $this->langcodeKey];
+        $revision_data_fields = array_diff($revisionable_fields, $revision_metadata_fields, [$this->langcodeKey]);
         $table_mapping->setFieldNames($this->revisionDataTable, array_merge($revision_data_key_fields, $revision_data_fields));
       }
 
@@ -352,21 +352,21 @@ public function getTableMapping(array $storage_definitions = NULL) {
       $dedicated_table_definitions = array_filter($definitions, function (FieldStorageDefinitionInterface $definition) use ($table_mapping) {
         return $table_mapping->requiresDedicatedTableStorage($definition);
       });
-      $extra_columns = array(
+      $extra_columns = [
         'bundle',
         'deleted',
         'entity_id',
         'revision_id',
         'langcode',
         'delta',
-      );
+      ];
       foreach ($dedicated_table_definitions as $field_name => $definition) {
         $tables = [$table_mapping->getDedicatedDataTableName($definition)];
         if ($revisionable && $definition->isRevisionable()) {
           $tables[] = $table_mapping->getDedicatedRevisionTableName($definition);
         }
         foreach ($tables as $table_name) {
-          $table_mapping->setFieldNames($table_name, array($field_name));
+          $table_mapping->setFieldNames($table_name, [$field_name]);
           $table_mapping->setExtraColumns($table_name, $extra_columns);
         }
       }
@@ -409,7 +409,7 @@ protected function doLoadMultiple(array $ids = NULL) {
    *   Array of entities from the storage.
    */
   protected function getFromStorage(array $ids = NULL) {
-    $entities = array();
+    $entities = [];
 
     if (!empty($ids)) {
       // Sanitize IDs. Before feeding ID array into buildQuery, check whether
@@ -444,12 +444,12 @@ protected function getFromStorage(array $ids = NULL) {
    */
   protected function mapFromStorageRecords(array $records, $load_from_revision = FALSE) {
     if (!$records) {
-      return array();
+      return [];
     }
 
-    $values = array();
+    $values = [];
     foreach ($records as $id => $record) {
-      $values[$id] = array();
+      $values[$id] = [];
       // Skip the item delta and item value levels (if possible) but let the
       // field assign the value as suiting. This avoids unnecessary array
       // hierarchies and saves memory here.
@@ -469,13 +469,13 @@ protected function mapFromStorageRecords(array $records, $load_from_revision = F
     }
 
     // Initialize translations array.
-    $translations = array_fill_keys(array_keys($values), array());
+    $translations = array_fill_keys(array_keys($values), []);
 
     // Load values from shared and dedicated tables.
     $this->loadFromSharedTables($values, $translations);
     $this->loadFromDedicatedTables($values, $load_from_revision);
 
-    $entities = array();
+    $entities = [];
     foreach ($values as $id => $entity_values) {
       $bundle = $this->bundleKey ? $entity_values[$this->bundleKey][LanguageInterface::LANGCODE_DEFAULT] : FALSE;
       // Turn the record into an entity class.
@@ -499,7 +499,7 @@ protected function loadFromSharedTables(array &$values, array &$translations) {
       // latest revision. Otherwise we fall back to the data table.
       $table = $this->revisionDataTable ?: $this->dataTable;
       $alias = $this->revisionDataTable ? 'revision' : 'data';
-      $query = $this->database->select($table, $alias, array('fetch' => \PDO::FETCH_ASSOC))
+      $query = $this->database->select($table, $alias, ['fetch' => \PDO::FETCH_ASSOC])
         ->fields($alias)
         ->condition($alias . '.' . $this->idKey, array_keys($values), 'IN')
         ->orderBy($alias . '.' . $this->idKey);
@@ -508,7 +508,7 @@ protected function loadFromSharedTables(array &$values, array &$translations) {
       if ($this->revisionDataTable) {
         // Find revisioned fields that are not entity keys. Exclude the langcode
         // key as the base table holds only the default language.
-        $base_fields = array_diff($table_mapping->getFieldNames($this->baseTable), array($this->langcodeKey));
+        $base_fields = array_diff($table_mapping->getFieldNames($this->baseTable), [$this->langcodeKey]);
         $revisioned_fields = array_diff($table_mapping->getFieldNames($this->revisionDataTable), $base_fields);
 
         // Find fields that are not revisioned or entity keys. Data fields have
@@ -535,7 +535,7 @@ protected function loadFromSharedTables(array &$values, array &$translations) {
         }
 
         // Get the revision IDs.
-        $revision_ids = array();
+        $revision_ids = [];
         foreach ($values as $entity_values) {
           $revision_ids[] = $entity_values[$this->revisionKey][LanguageInterface::LANGCODE_DEFAULT];
         }
@@ -578,7 +578,7 @@ protected function doLoadRevisionFieldItems($revision_id) {
     $revision = NULL;
 
     // Build and execute the query.
-    $query_result = $this->buildQuery(array(), $revision_id)->execute();
+    $query_result = $this->buildQuery([], $revision_id)->execute();
     $records = $query_result->fetchAllAssoc($this->idKey);
 
     if (!empty($records)) {
@@ -649,7 +649,7 @@ protected function buildQuery($ids, $revision_id = FALSE) {
     $query->addTag($this->entityTypeId . '_load_multiple');
 
     if ($revision_id) {
-      $query->join($this->revisionTable, 'revision', "revision.{$this->idKey} = base.{$this->idKey} AND revision.{$this->revisionKey} = :revisionId", array(':revisionId' => $revision_id));
+      $query->join($this->revisionTable, 'revision', "revision.{$this->idKey} = base.{$this->idKey} AND revision.{$this->revisionKey} = :revisionId", [':revisionId' => $revision_id]);
     }
     elseif ($this->revisionTable) {
       $query->join($this->revisionTable, 'revision', "revision.{$this->revisionKey} = base.{$this->revisionKey}");
@@ -832,7 +832,7 @@ protected function doSaveFieldItems(ContentEntityInterface $entity, array $names
       }
       else {
         $insert_id = $this->database
-          ->insert($this->baseTable, array('return' => Database::RETURN_INSERT_ID))
+          ->insert($this->baseTable, ['return' => Database::RETURN_INSERT_ID])
           ->fields((array) $record)
           ->execute();
         // Even if this is a new entity the ID key might have been set, in which
@@ -944,7 +944,7 @@ protected function mapToStorageRecord(ContentEntityInterface $entity, $table_nam
         // @todo Give field types more control over this behavior in
         //   https://www.drupal.org/node/2232427.
         if (!$definition->getMainPropertyName() && count($columns) == 1) {
-          $value = ($item = $entity->$field_name->first()) ? $item->getValue() : array();
+          $value = ($item = $entity->$field_name->first()) ? $item->getValue() : [];
         }
         else {
           $value = isset($entity->$field_name->$column_name) ? $entity->$field_name->$column_name : NULL;
@@ -1031,7 +1031,7 @@ protected function saveRevision(ContentEntityInterface $entity) {
 
     if ($entity->isNewRevision()) {
       $insert_id = $this->database
-        ->insert($this->revisionTable, array('return' => Database::RETURN_INSERT_ID))
+        ->insert($this->revisionTable, ['return' => Database::RETURN_INSERT_ID])
         ->fields((array) $record)
         ->execute();
       // Even if this is a new revision, the revision ID key might have been
@@ -1041,7 +1041,7 @@ protected function saveRevision(ContentEntityInterface $entity) {
       }
       if ($entity->isDefaultRevision()) {
         $this->database->update($this->entityType->getBaseTable())
-          ->fields(array($this->revisionKey => $record->{$this->revisionKey}))
+          ->fields([$this->revisionKey => $record->{$this->revisionKey}])
           ->condition($this->idKey, $record->{$this->idKey})
           ->execute();
       }
@@ -1082,9 +1082,9 @@ protected function loadFromDedicatedTables(array &$values, $load_from_revision)
     }
 
     // Collect entities ids, bundles and languages.
-    $bundles = array();
-    $ids = array();
-    $default_langcodes = array();
+    $bundles = [];
+    $ids = [];
+    $default_langcodes = [];
     foreach ($values as $key => $entity_values) {
       $bundles[$this->bundleKey ? $entity_values[$this->bundleKey][LanguageInterface::LANGCODE_DEFAULT] : $this->entityTypeId] = TRUE;
       $ids[] = !$load_from_revision ? $key : $entity_values[$this->revisionKey][LanguageInterface::LANGCODE_DEFAULT];
@@ -1094,8 +1094,8 @@ protected function loadFromDedicatedTables(array &$values, $load_from_revision)
     }
 
     // Collect impacted fields.
-    $storage_definitions = array();
-    $definitions = array();
+    $storage_definitions = [];
+    $definitions = [];
     $table_mapping = $this->getTableMapping();
     foreach ($bundles as $bundle => $v) {
       $definitions[$bundle] = $this->entityManager->getFieldDefinitions($this->entityTypeId, $bundle);
@@ -1134,14 +1134,14 @@ protected function loadFromDedicatedTables(array &$values, $load_from_revision)
         }
 
         if (!isset($values[$row->entity_id][$field_name][$langcode])) {
-          $values[$row->entity_id][$field_name][$langcode] = array();
+          $values[$row->entity_id][$field_name][$langcode] = [];
         }
 
         // Ensure that records for non-translatable fields having invalid
         // languages are skipped.
         if ($langcode == LanguageInterface::LANGCODE_DEFAULT || $definitions[$bundle][$field_name]->isTranslatable()) {
           if ($storage_definition->getCardinality() == FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED || count($values[$row->entity_id][$field_name][$langcode]) < $storage_definition->getCardinality()) {
-            $item = array();
+            $item = [];
             // For each column declared by the field, populate the item from the
             // prefixed database column.
             foreach ($storage_definition->getColumns() as $column => $attributes) {
@@ -1169,7 +1169,7 @@ protected function loadFromDedicatedTables(array &$values, $load_from_revision)
    *   (optional) The names of the fields to be stored. Defaults to all the
    *   available fields.
    */
-  protected function saveToDedicatedTables(ContentEntityInterface $entity, $update = TRUE, $names = array()) {
+  protected function saveToDedicatedTables(ContentEntityInterface $entity, $update = TRUE, $names = []) {
     $vid = $entity->getRevisionId();
     $id = $entity->id();
     $bundle = $entity->bundle();
@@ -1224,7 +1224,7 @@ protected function saveToDedicatedTables(ContentEntityInterface $entity, $update
 
       // Prepare the multi-insert query.
       $do_insert = FALSE;
-      $columns = array('entity_id', 'revision_id', 'bundle', 'delta', 'langcode');
+      $columns = ['entity_id', 'revision_id', 'bundle', 'delta', 'langcode'];
       foreach ($storage_definition->getColumns() as $column => $attributes) {
         $columns[] = $table_mapping->getFieldColumnName($storage_definition, $column);
       }
@@ -1233,7 +1233,7 @@ protected function saveToDedicatedTables(ContentEntityInterface $entity, $update
         $revision_query = $this->database->insert($revision_name)->fields($columns);
       }
 
-      $langcodes = $field_definition->isTranslatable() ? $translation_langcodes : array($default_langcode);
+      $langcodes = $field_definition->isTranslatable() ? $translation_langcodes : [$default_langcode];
       foreach ($langcodes as $langcode) {
         $delta_count = 0;
         $items = $entity->getTranslation($langcode)->get($field_name);
@@ -1241,13 +1241,13 @@ protected function saveToDedicatedTables(ContentEntityInterface $entity, $update
         foreach ($items as $delta => $item) {
           // We now know we have something to insert.
           $do_insert = TRUE;
-          $record = array(
+          $record = [
             'entity_id' => $id,
             'revision_id' => $vid,
             'bundle' => $bundle,
             'delta' => $delta,
             'langcode' => $langcode,
-          );
+          ];
           foreach ($storage_definition->getColumns() as $column => $attributes) {
             $column_name = $table_mapping->getFieldColumnName($storage_definition, $column);
             // Serialize the value if specified in the column schema.
@@ -1434,11 +1434,11 @@ public function onFieldStorageDefinitionDelete(FieldStorageDefinitionInterface $
       $table = $table_mapping->getDedicatedDataTableName($storage_definition);
       $revision_table = $table_mapping->getDedicatedRevisionTableName($storage_definition);
       $this->database->update($table)
-        ->fields(array('deleted' => 1))
+        ->fields(['deleted' => 1])
         ->execute();
       if ($this->entityType->isRevisionable()) {
         $this->database->update($revision_table)
-          ->fields(array('deleted' => 1))
+          ->fields(['deleted' => 1])
           ->execute();
       }
     }
@@ -1484,12 +1484,12 @@ public function onFieldDefinitionDelete(FieldDefinitionInterface $field_definiti
       $table_name = $table_mapping->getDedicatedDataTableName($storage_definition);
       $revision_name = $table_mapping->getDedicatedRevisionTableName($storage_definition);
       $this->database->update($table_name)
-        ->fields(array('deleted' => 1))
+        ->fields(['deleted' => 1])
         ->condition('bundle', $field_definition->getTargetBundle())
         ->execute();
       if ($this->entityType->isRevisionable()) {
         $this->database->update($revision_name)
-          ->fields(array('deleted' => 1))
+          ->fields(['deleted' => 1])
           ->condition('bundle', $field_definition->getTargetBundle())
           ->execute();
       }
@@ -1518,27 +1518,27 @@ protected function readFieldItemsToPurge(FieldDefinitionInterface $field_definit
     $table_name = $table_mapping->getDedicatedDataTableName($storage_definition, $is_deleted);
 
     // Get the entities which we want to purge first.
-    $entity_query = $this->database->select($table_name, 't', array('fetch' => \PDO::FETCH_ASSOC));
+    $entity_query = $this->database->select($table_name, 't', ['fetch' => \PDO::FETCH_ASSOC]);
     $or = $entity_query->orConditionGroup();
     foreach ($storage_definition->getColumns() as $column_name => $data) {
       $or->isNotNull($table_mapping->getFieldColumnName($storage_definition, $column_name));
     }
     $entity_query
       ->distinct(TRUE)
-      ->fields('t', array('entity_id'))
+      ->fields('t', ['entity_id'])
       ->condition('bundle', $field_definition->getTargetBundle())
       ->range(0, $batch_size);
 
     // Create a map of field data table column names to field column names.
-    $column_map = array();
+    $column_map = [];
     foreach ($storage_definition->getColumns() as $column_name => $data) {
       $column_map[$table_mapping->getFieldColumnName($storage_definition, $column_name)] = $column_name;
     }
 
-    $entities = array();
-    $items_by_entity = array();
+    $entities = [];
+    $items_by_entity = [];
     foreach ($entity_query->execute() as $row) {
-      $item_query = $this->database->select($table_name, 't', array('fetch' => \PDO::FETCH_ASSOC))
+      $item_query = $this->database->select($table_name, 't', ['fetch' => \PDO::FETCH_ASSOC])
         ->fields('t')
         ->condition('entity_id', $row['entity_id'])
         ->condition('deleted', 1)
@@ -1552,7 +1552,7 @@ protected function readFieldItemsToPurge(FieldDefinitionInterface $field_definit
           // factory, see https://www.drupal.org/node/1867228.
           $entities[$item_row['revision_id']] = _field_create_entity_from_ids((object) $item_row);
         }
-        $item = array();
+        $item = [];
         foreach ($column_map as $db_column => $field_column) {
           $item[$field_column] = $item_row[$db_column];
         }
@@ -1625,7 +1625,7 @@ public function countFieldData($storage_definition, $as_bool = FALSE) {
       $query->condition($or);
       if (!$as_bool) {
         $query
-          ->fields('t', array('entity_id'))
+          ->fields('t', ['entity_id'])
           ->distinct(TRUE);
       }
     }
@@ -1650,7 +1650,7 @@ public function countFieldData($storage_definition, $as_bool = FALSE) {
       $query->condition($or);
       if (!$as_bool) {
         $query
-          ->fields('t', array($this->idKey))
+          ->fields('t', [$this->idKey])
           ->distinct(TRUE);
       }
     }
diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
index 96cea9f49db6db5e2ac52871f59d639b3abd2ce8..85d6fbed33ec5d519ae75a6d47e568c7d4e6e94e 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
@@ -522,7 +522,7 @@ protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $res
       $storage_definitions = $this->entityManager->getFieldStorageDefinitions($entity_type_id);
       foreach ($table_names as $table_name) {
         if (!isset($schema[$table_name])) {
-          $schema[$table_name] = array();
+          $schema[$table_name] = [];
         }
         foreach ($table_mapping->getFieldNames($table_name) as $field_name) {
           if (!isset($storage_definitions[$field_name])) {
@@ -583,12 +583,12 @@ protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $res
    *   A list of entity type tables, keyed by table key.
    */
   protected function getEntitySchemaTables() {
-    return array_filter(array(
+    return array_filter([
       'base_table' => $this->storage->getBaseTable(),
       'revision_table' => $this->storage->getRevisionTable(),
       'data_table' => $this->storage->getDataTable(),
       'revision_data_table' => $this->storage->getRevisionDataTable(),
-    ));
+    ]);
   }
 
   /**
@@ -693,7 +693,7 @@ protected function getFieldUniqueKeys($field_name, array $field_schema, array $c
    *   The schema definition for the specified key.
    */
   protected function getFieldSchemaData($field_name, array $field_schema, array $column_mapping, $schema_key) {
-    $data = array();
+    $data = [];
 
     $entity_type_id = $this->entityType->id();
     foreach ($field_schema[$schema_key] as $key => $columns) {
@@ -708,7 +708,7 @@ protected function getFieldSchemaData($field_name, array $field_schema, array $c
         // name and length.
         if (is_array($column)) {
           list($column_name, $length) = $column;
-          $data[$real_key][] = array($column_mapping[$column_name], $length);
+          $data[$real_key][] = [$column_mapping[$column_name], $length];
         }
         else {
           $data[$real_key][] = $column_mapping[$column];
@@ -761,7 +761,7 @@ protected function getFieldSchemaIdentifierName($entity_type_id, $field_name, $k
    *   The schema definition for the foreign keys.
    */
   protected function getFieldForeignKeys($field_name, array $field_schema, array $column_mapping) {
-    $foreign_keys = array();
+    $foreign_keys = [];
 
     foreach ($field_schema['foreign keys'] as $specifier => $specification) {
       // To avoid clashes with entity-level foreign keys we use
@@ -790,7 +790,7 @@ protected function getFieldForeignKeys($field_name, array $field_schema, array $
    *   The entity schema data array.
    */
   protected function loadEntitySchemaData(EntityTypeInterface $entity_type) {
-    return $this->installedStorageSchema()->get($entity_type->id() . '.entity_schema_data', array());
+    return $this->installedStorageSchema()->get($entity_type->id() . '.entity_schema_data', []);
   }
 
   /**
@@ -826,7 +826,7 @@ protected function deleteEntitySchemaData(EntityTypeInterface $entity_type) {
    *   The field schema data array.
    */
   protected function loadFieldSchemaData(FieldStorageDefinitionInterface $storage_definition) {
-    return $this->installedStorageSchema()->get($storage_definition->getTargetEntityTypeId() . '.field_schema_data.' . $storage_definition->getName(), array());
+    return $this->installedStorageSchema()->get($storage_definition->getTargetEntityTypeId() . '.field_schema_data.' . $storage_definition->getName(), []);
   }
 
   /**
@@ -863,21 +863,21 @@ protected function deleteFieldSchemaData(FieldStorageDefinitionInterface $storag
   protected function initializeBaseTable(ContentEntityTypeInterface $entity_type) {
     $entity_type_id = $entity_type->id();
 
-    $schema = array(
+    $schema = [
       'description' => "The base table for $entity_type_id entities.",
-      'primary key' => array($entity_type->getKey('id')),
-      'indexes' => array(),
-      'foreign keys' => array(),
-    );
+      'primary key' => [$entity_type->getKey('id')],
+      'indexes' => [],
+      'foreign keys' => [],
+    ];
 
     if ($entity_type->hasKey('revision')) {
       $revision_key = $entity_type->getKey('revision');
       $key_name = $this->getEntityIndexName($entity_type, $revision_key);
-      $schema['unique keys'][$key_name] = array($revision_key);
-      $schema['foreign keys'][$entity_type_id . '__revision'] = array(
+      $schema['unique keys'][$key_name] = [$revision_key];
+      $schema['foreign keys'][$entity_type_id . '__revision'] = [
         'table' => $this->storage->getRevisionTable(),
-        'columns' => array($revision_key => $revision_key),
-      );
+        'columns' => [$revision_key => $revision_key],
+      ];
     }
 
     $this->addTableDefaults($schema);
@@ -899,19 +899,19 @@ protected function initializeRevisionTable(ContentEntityTypeInterface $entity_ty
     $id_key = $entity_type->getKey('id');
     $revision_key = $entity_type->getKey('revision');
 
-    $schema = array(
+    $schema = [
       'description' => "The revision table for $entity_type_id entities.",
-      'primary key' => array($revision_key),
-      'indexes' => array(),
-      'foreign keys' => array(
-        $entity_type_id . '__revisioned' => array(
+      'primary key' => [$revision_key],
+      'indexes' => [],
+      'foreign keys' => [
+        $entity_type_id . '__revisioned' => [
           'table' => $this->storage->getBaseTable(),
-          'columns' => array($id_key => $id_key),
-        ),
-      ),
-    );
+          'columns' => [$id_key => $id_key],
+        ],
+      ],
+    ];
 
-    $schema['indexes'][$this->getEntityIndexName($entity_type, $id_key)] = array($id_key);
+    $schema['indexes'][$this->getEntityIndexName($entity_type, $id_key)] = [$id_key];
 
     $this->addTableDefaults($schema);
 
@@ -931,23 +931,23 @@ protected function initializeDataTable(ContentEntityTypeInterface $entity_type)
     $entity_type_id = $entity_type->id();
     $id_key = $entity_type->getKey('id');
 
-    $schema = array(
+    $schema = [
       'description' => "The data table for $entity_type_id entities.",
-      'primary key' => array($id_key, $entity_type->getKey('langcode')),
-      'indexes' => array(
-        $entity_type_id . '__id__default_langcode__langcode' => array($id_key, $entity_type->getKey('default_langcode'), $entity_type->getKey('langcode')),
-      ),
-      'foreign keys' => array(
-        $entity_type_id => array(
+      'primary key' => [$id_key, $entity_type->getKey('langcode')],
+      'indexes' => [
+        $entity_type_id . '__id__default_langcode__langcode' => [$id_key, $entity_type->getKey('default_langcode'), $entity_type->getKey('langcode')],
+      ],
+      'foreign keys' => [
+        $entity_type_id => [
           'table' => $this->storage->getBaseTable(),
-          'columns' => array($id_key => $id_key),
-        ),
-      ),
-    );
+          'columns' => [$id_key => $id_key],
+        ],
+      ],
+    ];
 
     if ($entity_type->hasKey('revision')) {
       $key = $entity_type->getKey('revision');
-      $schema['indexes'][$this->getEntityIndexName($entity_type, $key)] = array($key);
+      $schema['indexes'][$this->getEntityIndexName($entity_type, $key)] = [$key];
     }
 
     $this->addTableDefaults($schema);
@@ -969,23 +969,23 @@ protected function initializeRevisionDataTable(ContentEntityTypeInterface $entit
     $id_key = $entity_type->getKey('id');
     $revision_key = $entity_type->getKey('revision');
 
-    $schema = array(
+    $schema = [
       'description' => "The revision data table for $entity_type_id entities.",
-      'primary key' => array($revision_key, $entity_type->getKey('langcode')),
-      'indexes' => array(
-        $entity_type_id . '__id__default_langcode__langcode' => array($id_key, $entity_type->getKey('default_langcode'), $entity_type->getKey('langcode')),
-      ),
-      'foreign keys' => array(
-        $entity_type_id => array(
+      'primary key' => [$revision_key, $entity_type->getKey('langcode')],
+      'indexes' => [
+        $entity_type_id . '__id__default_langcode__langcode' => [$id_key, $entity_type->getKey('default_langcode'), $entity_type->getKey('langcode')],
+      ],
+      'foreign keys' => [
+        $entity_type_id => [
           'table' => $this->storage->getBaseTable(),
-          'columns' => array($id_key => $id_key),
-        ),
-        $entity_type_id . '__revision' => array(
+          'columns' => [$id_key => $id_key],
+        ],
+        $entity_type_id . '__revision' => [
           'table' => $this->storage->getRevisionTable(),
-          'columns' => array($revision_key => $revision_key),
-        )
-      ),
-    );
+          'columns' => [$revision_key => $revision_key],
+        ]
+      ],
+    ];
 
     $this->addTableDefaults($schema);
 
@@ -999,12 +999,12 @@ protected function initializeRevisionDataTable(ContentEntityTypeInterface $entit
    *   The schema definition array for a single table, passed by reference.
    */
   protected function addTableDefaults(&$schema) {
-    $schema += array(
-      'fields' => array(),
-      'unique keys' => array(),
-      'indexes' => array(),
-      'foreign keys' => array(),
-    );
+    $schema += [
+      'fields' => [],
+      'unique keys' => [],
+      'indexes' => [],
+      'foreign keys' => [],
+    ];
   }
 
   /**
@@ -1149,7 +1149,7 @@ protected function createSharedTableSchema(FieldStorageDefinitionInterface $stor
 
     // Iterate over the mapped table to find the ones that will host the created
     // field schema.
-    $schema = array();
+    $schema = [];
     foreach ($shared_table_names as $table_name) {
       foreach ($table_mapping->getFieldNames($table_name) as $field_name) {
         if ($field_name == $created_field_name) {
@@ -1329,15 +1329,15 @@ protected function updateDedicatedTableSchema(FieldStorageDefinitionInterface $s
       foreach ($schema['indexes'] as $name => $columns) {
         if (!isset($original_schema['indexes'][$name]) || $columns != $original_schema['indexes'][$name]) {
           $real_name = $this->getFieldIndexName($storage_definition, $name);
-          $real_columns = array();
+          $real_columns = [];
           foreach ($columns as $column_name) {
             // Indexes can be specified as either a column name or an array with
             // column name and length. Allow for either case.
             if (is_array($column_name)) {
-              $real_columns[] = array(
+              $real_columns[] = [
                 $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
                 $column_name[1],
-              );
+              ];
             }
             else {
               $real_columns[] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
@@ -1403,7 +1403,7 @@ protected function updateSharedTableSchema(FieldStorageDefinitionInterface $stor
       // Iterate over the mapped table to find the ones that host the deleted
       // field schema.
       $original_schema = $this->loadFieldSchemaData($original);
-      $schema = array();
+      $schema = [];
       foreach ($table_mapping->getTableNames() as $table_name) {
         foreach ($table_mapping->getFieldNames($table_name) as $field_name) {
           if ($field_name == $updated_field_name) {
@@ -1598,7 +1598,7 @@ protected function hasNullFieldPropertyData($table_name, $column_name) {
    *   Exception thrown if the schema contains reserved column names.
    */
   protected function getSharedTableFieldSchema(FieldStorageDefinitionInterface $storage_definition, $table_name, array $column_mapping) {
-    $schema = array();
+    $schema = [];
     $field_schema = $storage_definition->getSchema();
 
     // Check that the schema does not include forbidden column names.
@@ -1670,7 +1670,7 @@ protected function getSharedTableFieldSchema(FieldStorageDefinitionInterface $st
   protected function addSharedTableFieldIndex(FieldStorageDefinitionInterface $storage_definition, &$schema, $not_null = FALSE, $size = NULL) {
     $name = $storage_definition->getName();
     $real_key = $this->getFieldSchemaIdentifierName($storage_definition->getTargetEntityTypeId(), $name);
-    $schema['indexes'][$real_key] = array($size ? array($name, $size) : $name);
+    $schema['indexes'][$real_key] = [$size ? [$name, $size] : $name];
     if ($not_null) {
       $schema['fields'][$name]['not null'] = TRUE;
     }
@@ -1690,7 +1690,7 @@ protected function addSharedTableFieldIndex(FieldStorageDefinitionInterface $sto
   protected function addSharedTableFieldUniqueKey(FieldStorageDefinitionInterface $storage_definition, &$schema) {
     $name = $storage_definition->getName();
     $real_key = $this->getFieldSchemaIdentifierName($storage_definition->getTargetEntityTypeId(), $name);
-    $schema['unique keys'][$real_key] = array($name);
+    $schema['unique keys'][$real_key] = [$name];
     $schema['fields'][$name]['not null'] = TRUE;
   }
 
@@ -1709,10 +1709,10 @@ protected function addSharedTableFieldUniqueKey(FieldStorageDefinitionInterface
   protected function addSharedTableFieldForeignKey(FieldStorageDefinitionInterface $storage_definition, &$schema, $foreign_table, $foreign_column) {
     $name = $storage_definition->getName();
     $real_key = $this->getFieldSchemaIdentifierName($storage_definition->getTargetEntityTypeId(), $name);
-    $schema['foreign keys'][$real_key] = array(
+    $schema['foreign keys'][$real_key] = [
       'table' => $foreign_table,
-      'columns' => array($name => $foreign_column),
-    );
+      'columns' => [$name => $foreign_column],
+    ];
   }
 
   /**
@@ -1742,20 +1742,20 @@ protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $stor
 
     $id_definition = $this->fieldStorageDefinitions[$this->entityType->getKey('id')];
     if ($id_definition->getType() == 'integer') {
-      $id_schema = array(
+      $id_schema = [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'description' => 'The entity id this data is attached to',
-      );
+      ];
     }
     else {
-      $id_schema = array(
+      $id_schema = [
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
         'description' => 'The entity id this data is attached to',
-      );
+      ];
     }
 
     // Define the revision ID schema.
@@ -1764,61 +1764,61 @@ protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $stor
       $revision_id_schema['description'] = 'The entity revision id this data is attached to, which for an unversioned entity type is the same as the entity id';
     }
     elseif ($this->fieldStorageDefinitions[$this->entityType->getKey('revision')]->getType() == 'integer') {
-      $revision_id_schema = array(
+      $revision_id_schema = [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'description' => 'The entity revision id this data is attached to',
-      );
+      ];
     }
     else {
-      $revision_id_schema = array(
+      $revision_id_schema = [
         'type' => 'varchar',
         'length' => 128,
         'not null' => TRUE,
         'description' => 'The entity revision id this data is attached to',
-      );
+      ];
     }
 
-    $data_schema = array(
+    $data_schema = [
       'description' => $description_current,
-      'fields' => array(
-        'bundle' => array(
+      'fields' => [
+        'bundle' => [
           'type' => 'varchar_ascii',
           'length' => 128,
           'not null' => TRUE,
           'default' => '',
           'description' => 'The field instance bundle to which this row belongs, used when deleting a field instance',
-        ),
-        'deleted' => array(
+        ],
+        'deleted' => [
           'type' => 'int',
           'size' => 'tiny',
           'not null' => TRUE,
           'default' => 0,
           'description' => 'A boolean indicating whether this data item has been deleted'
-        ),
+        ],
         'entity_id' => $id_schema,
         'revision_id' => $revision_id_schema,
-        'langcode' => array(
+        'langcode' => [
           'type' => 'varchar_ascii',
           'length' => 32,
           'not null' => TRUE,
           'default' => '',
           'description' => 'The language code for this data item.',
-        ),
-        'delta' => array(
+        ],
+        'delta' => [
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'description' => 'The sequence number for this data item, used for multi-value fields',
-        ),
-      ),
-      'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
-      'indexes' => array(
-        'bundle' => array('bundle'),
-        'revision_id' => array('revision_id'),
-      ),
-    );
+        ],
+      ],
+      'primary key' => ['entity_id', 'deleted', 'delta', 'langcode'],
+      'indexes' => [
+        'bundle' => ['bundle'],
+        'revision_id' => ['revision_id'],
+      ],
+    ];
 
     // Check that the schema does not include forbidden column names.
     $schema = $storage_definition->getSchema();
@@ -1845,10 +1845,10 @@ protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $stor
         // Indexes can be specified as either a column name or an array with
         // column name and length. Allow for either case.
         if (is_array($column_name)) {
-          $data_schema['indexes'][$real_name][] = array(
+          $data_schema['indexes'][$real_name][] = [
             $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
             $column_name[1],
-          );
+          ];
         }
         else {
           $data_schema['indexes'][$real_name][] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
@@ -1863,10 +1863,10 @@ protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $stor
         // Unique keys can be specified as either a column name or an array with
         // column name and length. Allow for either case.
         if (is_array($column_name)) {
-          $data_schema['unique keys'][$real_name][] = array(
+          $data_schema['unique keys'][$real_name][] = [
             $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
             $column_name[1],
-          );
+          ];
         }
         else {
           $data_schema['unique keys'][$real_name][] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
@@ -1884,17 +1884,17 @@ protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $stor
       }
     }
 
-    $dedicated_table_schema = array($table_mapping->getDedicatedDataTableName($storage_definition) => $data_schema);
+    $dedicated_table_schema = [$table_mapping->getDedicatedDataTableName($storage_definition) => $data_schema];
 
     // If the entity type is revisionable, construct the revision table.
     $entity_type = $entity_type ?: $this->entityType;
     if ($entity_type->isRevisionable()) {
       $revision_schema = $data_schema;
       $revision_schema['description'] = $description_revision;
-      $revision_schema['primary key'] = array('entity_id', 'revision_id', 'deleted', 'delta', 'langcode');
+      $revision_schema['primary key'] = ['entity_id', 'revision_id', 'deleted', 'delta', 'langcode'];
       $revision_schema['fields']['revision_id']['not null'] = TRUE;
       $revision_schema['fields']['revision_id']['description'] = 'The entity revision id this data is attached to';
-      $dedicated_table_schema += array($table_mapping->getDedicatedRevisionTableName($storage_definition) => $revision_schema);
+      $dedicated_table_schema += [$table_mapping->getDedicatedRevisionTableName($storage_definition) => $revision_schema];
     }
 
     return $dedicated_table_schema;
diff --git a/core/lib/Drupal/Core/Entity/TypedData/EntityDataDefinition.php b/core/lib/Drupal/Core/Entity/TypedData/EntityDataDefinition.php
index 12e7f8d780d5a103e2b9e8ae04adce71618cec18..be6405af4abdf1a3ace551ce2ca0b08e2626390d 100644
--- a/core/lib/Drupal/Core/Entity/TypedData/EntityDataDefinition.php
+++ b/core/lib/Drupal/Core/Entity/TypedData/EntityDataDefinition.php
@@ -19,7 +19,7 @@ class EntityDataDefinition extends ComplexDataDefinitionBase implements EntityDa
    * @return static
    */
   public static function create($entity_type_id = NULL) {
-    $definition = new static(array());
+    $definition = new static([]);
     // Set the passed entity type.
     if (isset($entity_type_id)) {
       $definition->setEntityTypeId($entity_type_id);
@@ -41,7 +41,7 @@ public static function createFromDataType($data_type) {
       $definition->setEntityTypeId($parts[1]);
     }
     if (isset($parts[2])) {
-      $definition->setBundles(array($parts[2]));
+      $definition->setBundles([$parts[2]]);
     }
     return $definition;
   }
@@ -55,7 +55,7 @@ public function getPropertyDefinitions() {
         // Return an empty array for entities that are not content entities.
         $entity_type_class = \Drupal::entityManager()->getDefinition($entity_type_id)->getClass();
         if (!in_array('Drupal\Core\Entity\FieldableEntityInterface', class_implements($entity_type_class))) {
-          $this->propertyDefinitions = array();
+          $this->propertyDefinitions = [];
         }
         else {
           // @todo: Add support for handling multiple bundles.
@@ -71,7 +71,7 @@ public function getPropertyDefinitions() {
       }
       else {
         // No entity type given.
-        $this->propertyDefinitions = array();
+        $this->propertyDefinitions = [];
       }
     }
     return $this->propertyDefinitions;
@@ -115,7 +115,7 @@ public function setEntityTypeId($entity_type_id) {
    */
   public function getBundles() {
     $bundle = isset($this->definition['constraints']['Bundle']) ? $this->definition['constraints']['Bundle'] : NULL;
-    return is_string($bundle) ? array($bundle) : $bundle;
+    return is_string($bundle) ? [$bundle] : $bundle;
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Entity/entity.api.php b/core/lib/Drupal/Core/Entity/entity.api.php
index 5ee5af61489c7034135e25f6c2ad78f3e29ebe30..f9f4271e3b6acc59038824e76f43115a62736c4f 100644
--- a/core/lib/Drupal/Core/Entity/entity.api.php
+++ b/core/lib/Drupal/Core/Entity/entity.api.php
@@ -939,12 +939,12 @@ function hook_ENTITY_TYPE_presave(Drupal\Core\Entity\EntityInterface $entity) {
 function hook_entity_insert(Drupal\Core\Entity\EntityInterface $entity) {
   // Insert the new entity into a fictional table of all entities.
   db_insert('example_entity')
-    ->fields(array(
+    ->fields([
       'type' => $entity->getEntityTypeId(),
       'id' => $entity->id(),
       'created' => REQUEST_TIME,
       'updated' => REQUEST_TIME,
-    ))
+    ])
     ->execute();
 }
 
@@ -963,11 +963,11 @@ function hook_entity_insert(Drupal\Core\Entity\EntityInterface $entity) {
 function hook_ENTITY_TYPE_insert(Drupal\Core\Entity\EntityInterface $entity) {
   // Insert the new entity into a fictional table of this type of entity.
   db_insert('example_entity')
-    ->fields(array(
+    ->fields([
       'id' => $entity->id(),
       'created' => REQUEST_TIME,
       'updated' => REQUEST_TIME,
-    ))
+    ])
     ->execute();
 }
 
@@ -987,9 +987,9 @@ function hook_ENTITY_TYPE_insert(Drupal\Core\Entity\EntityInterface $entity) {
 function hook_entity_update(Drupal\Core\Entity\EntityInterface $entity) {
   // Update the entity's entry in a fictional table of all entities.
   db_update('example_entity')
-    ->fields(array(
+    ->fields([
       'updated' => REQUEST_TIME,
-    ))
+    ])
     ->condition('type', $entity->getEntityTypeId())
     ->condition('id', $entity->id())
     ->execute();
@@ -1011,9 +1011,9 @@ function hook_entity_update(Drupal\Core\Entity\EntityInterface $entity) {
 function hook_ENTITY_TYPE_update(Drupal\Core\Entity\EntityInterface $entity) {
   // Update the entity's entry in a fictional table of this type of entity.
   db_update('example_entity')
-    ->fields(array(
+    ->fields([
       'updated' => REQUEST_TIME,
-    ))
+    ])
     ->condition('id', $entity->id())
     ->execute();
 }
@@ -1063,10 +1063,10 @@ function hook_ENTITY_TYPE_translation_create(\Drupal\Core\Entity\EntityInterface
  * @see hook_ENTITY_TYPE_translation_insert()
  */
 function hook_entity_translation_insert(\Drupal\Core\Entity\EntityInterface $translation) {
-  $variables = array(
+  $variables = [
     '@language' => $translation->language()->getName(),
     '@label' => $translation->getUntranslated()->label(),
-  );
+  ];
   \Drupal::logger('example')->notice('The @language translation of @label has just been stored.', $variables);
 }
 
@@ -1083,10 +1083,10 @@ function hook_entity_translation_insert(\Drupal\Core\Entity\EntityInterface $tra
  * @see hook_entity_translation_insert()
  */
 function hook_ENTITY_TYPE_translation_insert(\Drupal\Core\Entity\EntityInterface $translation) {
-  $variables = array(
+  $variables = [
     '@language' => $translation->language()->getName(),
     '@label' => $translation->getUntranslated()->label(),
-  );
+  ];
   \Drupal::logger('example')->notice('The @language translation of @label has just been stored.', $variables);
 }
 
@@ -1102,10 +1102,10 @@ function hook_ENTITY_TYPE_translation_insert(\Drupal\Core\Entity\EntityInterface
  * @see hook_ENTITY_TYPE_translation_delete()
  */
 function hook_entity_translation_delete(\Drupal\Core\Entity\EntityInterface $translation) {
-  $variables = array(
+  $variables = [
     '@language' => $translation->language()->getName(),
     '@label' => $translation->label(),
-  );
+  ];
   \Drupal::logger('example')->notice('The @language translation of @label has just been deleted.', $variables);
 }
 
@@ -1121,10 +1121,10 @@ function hook_entity_translation_delete(\Drupal\Core\Entity\EntityInterface $tra
  * @see hook_entity_translation_delete()
  */
 function hook_ENTITY_TYPE_translation_delete(\Drupal\Core\Entity\EntityInterface $translation) {
-  $variables = array(
+  $variables = [
     '@language' => $translation->language()->getName(),
     '@label' => $translation->label(),
-  );
+  ];
   \Drupal::logger('example')->notice('The @language translation of @label has just been deleted.', $variables);
 }
 
@@ -1151,8 +1151,8 @@ function hook_entity_predelete(Drupal\Core\Entity\EntityInterface $entity) {
 
   // Log the count in a table that records this statistic for deleted entities.
   db_merge('example_deleted_entity_statistics')
-    ->key(array('type' => $type, 'id' => $id))
-    ->fields(array('count' => $count))
+    ->key(['type' => $type, 'id' => $id])
+    ->fields(['count' => $count])
     ->execute();
 }
 
@@ -1179,8 +1179,8 @@ function hook_ENTITY_TYPE_predelete(Drupal\Core\Entity\EntityInterface $entity)
 
   // Log the count in a table that records this statistic for deleted entities.
   db_merge('example_deleted_entity_statistics')
-    ->key(array('type' => $type, 'id' => $id))
-    ->fields(array('count' => $count))
+    ->key(['type' => $type, 'id' => $id])
+    ->fields(['count' => $count])
     ->execute();
 }
 
@@ -1283,10 +1283,10 @@ function hook_entity_view(array &$build, \Drupal\Core\Entity\EntityInterface $en
   // This assumes a 'mymodule_addition' extra field has been defined for the
   // entity bundle in hook_entity_extra_field_info().
   if ($display->getComponent('mymodule_addition')) {
-    $build['mymodule_addition'] = array(
+    $build['mymodule_addition'] = [
       '#markup' => mymodule_addition($entity),
       '#theme' => 'mymodule_my_additional_field',
-    );
+    ];
   }
 }
 
@@ -1315,10 +1315,10 @@ function hook_ENTITY_TYPE_view(array &$build, \Drupal\Core\Entity\EntityInterfac
   // This assumes a 'mymodule_addition' extra field has been defined for the
   // entity bundle in hook_entity_extra_field_info().
   if ($display->getComponent('mymodule_addition')) {
-    $build['mymodule_addition'] = array(
+    $build['mymodule_addition'] = [
       '#markup' => mymodule_addition($entity),
       '#theme' => 'mymodule_my_additional_field',
-    );
+    ];
   }
 }
 
@@ -1423,7 +1423,7 @@ function hook_entity_prepare_view($entity_type_id, array $entities, array $displ
     // Only do the extra work if the component is configured to be
     // displayed. This assumes a 'mymodule_addition' extra field has been
     // defined for the entity bundle in hook_entity_extra_field_info().
-    $ids = array();
+    $ids = [];
     foreach ($entities as $id => $entity) {
       if ($displays[$entity->bundle()]->getComponent('mymodule_addition')) {
         $ids[] = $id;
@@ -1634,9 +1634,9 @@ function hook_ENTITY_TYPE_prepare_form(\Drupal\Core\Entity\EntityInterface $enti
 function hook_entity_form_display_alter(\Drupal\Core\Entity\Display\EntityFormDisplayInterface $form_display, array $context) {
   // Hide the 'user_picture' field from the register form.
   if ($context['entity_type'] == 'user' && $context['form_mode'] == 'register') {
-    $form_display->setComponent('user_picture', array(
+    $form_display->setComponent('user_picture', [
       'region' => 'hidden',
-    ));
+    ]);
   }
 }
 
@@ -1657,7 +1657,7 @@ function hook_entity_form_display_alter(\Drupal\Core\Entity\Display\EntityFormDi
  */
 function hook_entity_base_field_info(\Drupal\Core\Entity\EntityTypeInterface $entity_type) {
   if ($entity_type->id() == 'node') {
-    $fields = array();
+    $fields = [];
     $fields['mymodule_text'] = BaseFieldDefinition::create('string')
       ->setLabel(t('The text'))
       ->setDescription(t('A text property added by mymodule.'))
@@ -1721,7 +1721,7 @@ function hook_entity_base_field_info_alter(&$fields, \Drupal\Core\Entity\EntityT
 function hook_entity_bundle_field_info(\Drupal\Core\Entity\EntityTypeInterface $entity_type, $bundle, array $base_field_definitions) {
   // Add a property only to nodes of the 'article' bundle.
   if ($entity_type->id() == 'node' && $bundle == 'article') {
-    $fields = array();
+    $fields = [];
     $fields['mymodule_text_more'] = BaseFieldDefinition::create('string')
       ->setLabel(t('More text'))
       ->setComputed(TRUE)
@@ -1776,7 +1776,7 @@ function hook_entity_field_storage_info(\Drupal\Core\Entity\EntityTypeInterface
       ->execute();
     // Fetch all fields and key them by field name.
     $field_storages = FieldStorageConfig::loadMultiple($ids);
-    $result = array();
+    $result = [];
     foreach ($field_storages as $field_storage) {
       $result[$field_storage->getName()] = $field_storage;
     }
@@ -1815,12 +1815,12 @@ function hook_entity_field_storage_info_alter(&$fields, \Drupal\Core\Entity\Enti
  * @see \Drupal\Core\Entity\EntityListBuilderInterface::getOperations()
  */
 function hook_entity_operation(\Drupal\Core\Entity\EntityInterface $entity) {
-  $operations = array();
-  $operations['translate'] = array(
+  $operations = [];
+  $operations['translate'] = [
     'title' => t('Translate'),
     'url' => \Drupal\Core\Url::fromRoute('foo_module.entity.translate'),
     'weight' => 50,
-  );
+  ];
 
   return $operations;
 }
@@ -1836,9 +1836,9 @@ function hook_entity_operation(\Drupal\Core\Entity\EntityInterface $entity) {
  */
 function hook_entity_operation_alter(array &$operations, \Drupal\Core\Entity\EntityInterface $entity) {
   // Alter the title and weight.
-  $operations['translate']['title'] = t('Translate @entity_type', array(
+  $operations['translate']['title'] = t('Translate @entity_type', [
     '@entity_type' => $entity->getEntityTypeId(),
-  ));
+  ]);
   $operations['translate']['weight'] = 99;
 }
 
@@ -1964,7 +1964,7 @@ function hook_ENTITY_TYPE_field_values_init(\Drupal\Core\Entity\FieldableEntityI
  *   \Drupal\Core\Entity\EntityFieldManagerInterface::getExtraFields().
  */
 function hook_entity_extra_field_info() {
-  $extra = array();
+  $extra = [];
   $module_language_enabled = \Drupal::moduleHandler()->moduleExists('language');
   $description = t('Node module element');
 
@@ -1977,19 +1977,19 @@ function hook_entity_extra_field_info() {
     if ($module_language_enabled) {
       $configuration = ContentLanguageSettings::loadByEntityTypeBundle('node', $bundle->id());
       if ($configuration->isLanguageAlterable()) {
-        $extra['node'][$bundle->id()]['form']['language'] = array(
+        $extra['node'][$bundle->id()]['form']['language'] = [
           'label' => t('Language'),
           'description' => $description,
           'weight' => 0,
-        );
+        ];
       }
     }
-    $extra['node'][$bundle->id()]['display']['language'] = array(
+    $extra['node'][$bundle->id()]['display']['language'] = [
       'label' => t('Language'),
       'description' => $description,
       'weight' => 0,
       'visible' => FALSE,
-    );
+    ];
   }
 
   return $extra;
diff --git a/core/lib/Drupal/Core/EventSubscriber/AjaxResponseSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/AjaxResponseSubscriber.php
index e2ffc058e091c4911fc21b538054747affa367a5..701c4337392362b1bbab4376b5f22f0c44cc2545 100644
--- a/core/lib/Drupal/Core/EventSubscriber/AjaxResponseSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/AjaxResponseSubscriber.php
@@ -110,8 +110,8 @@ public function onResponse(FilterResponseEvent $event) {
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    $events[KernelEvents::RESPONSE][] = array('onResponse', -100);
-    $events[KernelEvents::REQUEST][] = array('onRequest', 50);
+    $events[KernelEvents::RESPONSE][] = ['onResponse', -100];
+    $events[KernelEvents::REQUEST][] = ['onRequest', 50];
 
     return $events;
   }
diff --git a/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
index 24b4c70d5fb612ae10986296c7f7d1a5c5eeceaf..e948aa584c27ca06e6d9ccd99e1d8c4165f494c8 100644
--- a/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
@@ -54,13 +54,13 @@ public function __construct(ThemeHandlerInterface $theme_handler) {
    * @throws \Drupal\Core\Config\ConfigNameException
    */
   public function onConfigImporterValidate(ConfigImporterEvent $event) {
-    foreach (array('delete', 'create', 'update') as $op) {
+    foreach (['delete', 'create', 'update'] as $op) {
       foreach ($event->getConfigImporter()->getUnprocessedConfiguration($op) as $name) {
         try {
           Config::validateName($name);
         }
         catch (ConfigNameException $e) {
-          $message = $this->t('The config name @config_name is invalid.', array('@config_name' => $name));
+          $message = $this->t('The config name @config_name is invalid.', ['@config_name' => $name]);
           $event->getConfigImporter()->logError($message);
         }
       }
@@ -88,7 +88,7 @@ protected function validateModules(ConfigImporter $config_importer) {
     $module_data = $this->getModuleData();
     $nonexistent_modules = array_keys(array_diff_key($core_extension['module'], $module_data));
     foreach ($nonexistent_modules as $module) {
-      $config_importer->logError($this->t('Unable to install the %module module since it does not exist.', array('%module' => $module)));
+      $config_importer->logError($this->t('Unable to install the %module module since it does not exist.', ['%module' => $module]));
     }
 
     // Ensure that all modules being installed have their dependencies met.
@@ -105,7 +105,7 @@ protected function validateModules(ConfigImporter $config_importer) {
         $message = $this->formatPlural(count($missing_dependencies),
           'Unable to install the %module module since it requires the %required_module module.',
           'Unable to install the %module module since it requires the %required_module modules.',
-          array('%module' => $module_name, '%required_module' => implode(', ', $missing_dependencies))
+          ['%module' => $module_name, '%required_module' => implode(', ', $missing_dependencies)]
         );
         $config_importer->logError($message);
       }
@@ -123,7 +123,7 @@ protected function validateModules(ConfigImporter $config_importer) {
         if ($module_data[$dependent_module]->status && !in_array($dependent_module, $uninstalls, TRUE) && $dependent_module !== $install_profile) {
           $module_name = $module_data[$module]->info['name'];
           $dependent_module_name = $module_data[$dependent_module]->info['name'];
-          $config_importer->logError($this->t('Unable to uninstall the %module module since the %dependent_module module is installed.', array('%module' => $module_name, '%dependent_module' => $dependent_module_name)));
+          $config_importer->logError($this->t('Unable to uninstall the %module module since the %dependent_module module is installed.', ['%module' => $module_name, '%dependent_module' => $dependent_module_name]));
         }
       }
     }
@@ -131,12 +131,12 @@ protected function validateModules(ConfigImporter $config_importer) {
     // Ensure that the install profile is not being uninstalled.
     if (in_array($install_profile, $uninstalls, TRUE)) {
       $profile_name = $module_data[$install_profile]->info['name'];
-      $config_importer->logError($this->t('Unable to uninstall the %profile profile since it is the install profile.', array('%profile' => $profile_name)));
+      $config_importer->logError($this->t('Unable to uninstall the %profile profile since it is the install profile.', ['%profile' => $profile_name]));
     }
 
     // Ensure the profile is not changing.
     if ($install_profile !== $core_extension['profile']) {
-      $config_importer->logError($this->t('Cannot change the install profile from %new_profile to %profile once Drupal is installed.', array('%profile' => $install_profile, '%new_profile' => $core_extension['profile'])));
+      $config_importer->logError($this->t('Cannot change the install profile from %new_profile to %profile once Drupal is installed.', ['%profile' => $install_profile, '%new_profile' => $core_extension['profile']]));
     }
   }
 
@@ -153,7 +153,7 @@ protected function validateThemes(ConfigImporter $config_importer) {
     $installs = $config_importer->getExtensionChangelist('theme', 'install');
     foreach ($installs as $key => $theme) {
       if (!isset($theme_data[$theme])) {
-        $config_importer->logError($this->t('Unable to install the %theme theme since it does not exist.', array('%theme' => $theme)));
+        $config_importer->logError($this->t('Unable to install the %theme theme since it does not exist.', ['%theme' => $theme]));
         // Remove non-existing installs from the list so we can validate theme
         // dependencies later.
         unset($installs[$key]);
@@ -166,7 +166,7 @@ protected function validateThemes(ConfigImporter $config_importer) {
         if (!isset($core_extension['theme'][$required_theme])) {
           $theme_name = $theme_data[$theme]->info['name'];
           $required_theme_name = $theme_data[$required_theme]->info['name'];
-          $config_importer->logError($this->t('Unable to install the %theme theme since it requires the %required_theme theme.', array('%theme' => $theme_name, '%required_theme' => $required_theme_name)));
+          $config_importer->logError($this->t('Unable to install the %theme theme since it requires the %required_theme theme.', ['%theme' => $theme_name, '%required_theme' => $required_theme_name]));
         }
       }
     }
@@ -179,7 +179,7 @@ protected function validateThemes(ConfigImporter $config_importer) {
         if ($theme_data[$dependent_theme]->status && !in_array($dependent_theme, $uninstalls, TRUE)) {
           $theme_name = $theme_data[$theme]->info['name'];
           $dependent_theme_name = $theme_data[$dependent_theme]->info['name'];
-          $config_importer->logError($this->t('Unable to uninstall the %theme theme since the %dependent_theme theme is installed.', array('%theme' => $theme_name, '%dependent_theme' => $dependent_theme_name)));
+          $config_importer->logError($this->t('Unable to uninstall the %theme theme since the %dependent_theme theme is installed.', ['%theme' => $theme_name, '%dependent_theme' => $dependent_theme_name]));
         }
       }
     }
@@ -212,22 +212,22 @@ protected function validateDependencies(ConfigImporter $config_importer) {
       if ($owner !== 'core') {
         $message = FALSE;
         if (!isset($core_extension['module'][$owner]) && isset($module_data[$owner])) {
-          $message = $this->t('Configuration %name depends on the %owner module that will not be installed after import.', array(
+          $message = $this->t('Configuration %name depends on the %owner module that will not be installed after import.', [
             '%name' => $name,
             '%owner' => $module_data[$owner]->info['name']
-          ));
+          ]);
         }
         elseif (!isset($core_extension['theme'][$owner]) && isset($theme_data[$owner])) {
-          $message = $this->t('Configuration %name depends on the %owner theme that will not be installed after import.', array(
+          $message = $this->t('Configuration %name depends on the %owner theme that will not be installed after import.', [
             '%name' => $name,
             '%owner' => $theme_data[$owner]->info['name']
-          ));
+          ]);
         }
         elseif (!isset($core_extension['module'][$owner]) && !isset($core_extension['theme'][$owner])) {
-          $message = $this->t('Configuration %name depends on the %owner extension that will not be installed after import.', array(
+          $message = $this->t('Configuration %name depends on the %owner extension that will not be installed after import.', [
             '%name' => $name,
             '%owner' => $owner
-          ));
+          ]);
         }
 
         if ($message) {
@@ -254,7 +254,7 @@ protected function validateDependencies(ConfigImporter $config_importer) {
                   count($diffs),
                   'Configuration %name depends on the %module module that will not be installed after import.',
                   'Configuration %name depends on modules (%module) that will not be installed after import.',
-                  array('%name' => $name, '%module' => implode(', ', $this->getNames($diffs, $module_data)))
+                  ['%name' => $name, '%module' => implode(', ', $this->getNames($diffs, $module_data))]
                 );
                 break;
               case 'theme':
@@ -262,7 +262,7 @@ protected function validateDependencies(ConfigImporter $config_importer) {
                   count($diffs),
                   'Configuration %name depends on the %theme theme that will not be installed after import.',
                   'Configuration %name depends on themes (%theme) that will not be installed after import.',
-                  array('%name' => $name, '%theme' => implode(', ', $this->getNames($diffs, $theme_data)))
+                  ['%name' => $name, '%theme' => implode(', ', $this->getNames($diffs, $theme_data))]
                 );
                 break;
               case 'config':
@@ -270,7 +270,7 @@ protected function validateDependencies(ConfigImporter $config_importer) {
                   count($diffs),
                   'Configuration %name depends on the %config configuration that will not exist after import.',
                   'Configuration %name depends on configuration (%config) that will not exist after import.',
-                  array('%name' => $name, '%config' => implode(', ', $diffs))
+                  ['%name' => $name, '%config' => implode(', ', $diffs)]
                 );
                 break;
             }
diff --git a/core/lib/Drupal/Core/EventSubscriber/ConfigSnapshotSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ConfigSnapshotSubscriber.php
index e20e52f579da71cf188b4bb53cbd7d9881935660..330970138d9de562804d73b859735d143172aafc 100644
--- a/core/lib/Drupal/Core/EventSubscriber/ConfigSnapshotSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ConfigSnapshotSubscriber.php
@@ -65,7 +65,7 @@ public function onConfigImporterImport(ConfigImporterEvent $event) {
    *   An array of event listener definitions.
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::IMPORT][] = array('onConfigImporterImport', 40);
+    $events[ConfigEvents::IMPORT][] = ['onConfigImporterImport', 40];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/EnforcedFormResponseSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/EnforcedFormResponseSubscriber.php
index fc491af537c801dbf9fce638f49ab98e037cd3ca..351642617d3342961b73b11fb567d91b45308720 100644
--- a/core/lib/Drupal/Core/EventSubscriber/EnforcedFormResponseSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/EnforcedFormResponseSubscriber.php
@@ -39,8 +39,8 @@ public function onKernelResponse(FilterResponseEvent $event) {
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    $events[KernelEvents::EXCEPTION] = array('onKernelException', 128);
-    $events[KernelEvents::RESPONSE] = array('onKernelResponse', 128);
+    $events[KernelEvents::EXCEPTION] = ['onKernelException', 128];
+    $events[KernelEvents::RESPONSE] = ['onKernelResponse', 128];
 
     return $events;
   }
diff --git a/core/lib/Drupal/Core/EventSubscriber/EntityRouteAlterSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/EntityRouteAlterSubscriber.php
index 3c37195ca1f34d591f81516ccec623721acb5a35..ae8dafc4e3d88cef41b33c607253e09615377524 100644
--- a/core/lib/Drupal/Core/EventSubscriber/EntityRouteAlterSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/EntityRouteAlterSubscriber.php
@@ -53,7 +53,7 @@ public function onRoutingRouteAlterSetType(RouteBuildEvent $event) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[RoutingEvents::ALTER][] = array('onRoutingRouteAlterSetType', -150);
+    $events[RoutingEvents::ALTER][] = ['onRoutingRouteAlterSetType', -150];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/ExceptionTestSiteSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ExceptionTestSiteSubscriber.php
index f1088bf25f37b6ba5a9dc0ded49e359dca39d506..ab50f217ada3388977b098f2fd1c3f102ac0f546 100644
--- a/core/lib/Drupal/Core/EventSubscriber/ExceptionTestSiteSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ExceptionTestSiteSubscriber.php
@@ -37,7 +37,7 @@ public function on500(GetResponseForExceptionEvent $event) {
     $exception = $event->getException();
     $error = Error::decodeException($exception);
 
-    $headers = array();
+    $headers = [];
 
     // When running inside the testing framework, we relay the errors
     // to the tested site by the way of HTTP headers.
@@ -45,15 +45,15 @@ public function on500(GetResponseForExceptionEvent $event) {
       // $number does not use drupal_static as it should not be reset
       // as it uniquely identifies each PHP error.
       static $number = 0;
-      $assertion = array(
+      $assertion = [
         $error['@message'],
         $error['%type'],
-        array(
+        [
           'function' => $error['%function'],
           'file' => $error['%file'],
           'line' => $error['%line'],
-        ),
-      );
+        ],
+      ];
       $headers['X-Drupal-Assertion-' . $number] = rawurlencode(serialize($assertion));
       $number++;
     }
diff --git a/core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php
index 5898d17ae6a48173f53e04c0c5462f5b3f9db6c2..9ea7a830239ab2456a31294f2d8034e4ab1c2566 100644
--- a/core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php
@@ -298,10 +298,10 @@ protected function setExpiresNoCache(Response $response) {
    *   An array of event listener definitions.
    */
   public static function getSubscribedEvents() {
-    $events[KernelEvents::RESPONSE][] = array('onRespond');
+    $events[KernelEvents::RESPONSE][] = ['onRespond'];
     // There is no specific reason for choosing 16 beside it should be executed
     // before ::onRespond().
-    $events[KernelEvents::RESPONSE][] = array('onAllResponds', 16);
+    $events[KernelEvents::RESPONSE][] = ['onAllResponds', 16];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/KernelDestructionSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/KernelDestructionSubscriber.php
index 7b10dde4575bb695270a9e2f37629e564db99bbc..79d7dd5a39a59160728c2bfa8c2624c6d5c48a05 100644
--- a/core/lib/Drupal/Core/EventSubscriber/KernelDestructionSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/KernelDestructionSubscriber.php
@@ -20,7 +20,7 @@ class KernelDestructionSubscriber implements EventSubscriberInterface, Container
    *
    * @var array
    */
-  protected $services = array();
+  protected $services = [];
 
   /**
    * Registers a service for destruction.
@@ -62,7 +62,7 @@ static function getSubscribedEvents() {
     // Run this subscriber after others as those might use services that need
     // to be terminated as well or run code that needs to run before
     // termination.
-    $events[KernelEvents::TERMINATE][] = array('onKernelTerminate', -100);
+    $events[KernelEvents::TERMINATE][] = ['onKernelTerminate', -100];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/MaintenanceModeSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/MaintenanceModeSubscriber.php
index 57d43ec0be11109ab209f1dba42686fc14fe9835..ba82988a14d17b8d0b2fdcdf752c27d3aa4fe009 100644
--- a/core/lib/Drupal/Core/EventSubscriber/MaintenanceModeSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/MaintenanceModeSubscriber.php
@@ -103,7 +103,7 @@ public function onKernelRequestMaintenance(GetResponseEvent $event) {
         // If the request format is not 'html' then show default maintenance
         // mode page else show a text/plain page with maintenance message.
         if ($request->getRequestFormat() !== 'html') {
-          $response = new Response($this->getSiteMaintenanceMessage(), 503, array('Content-Type' => 'text/plain'));
+          $response = new Response($this->getSiteMaintenanceMessage(), 503, ['Content-Type' => 'text/plain']);
           $event->setResponse($response);
           return;
         }
@@ -118,7 +118,7 @@ public function onKernelRequestMaintenance(GetResponseEvent $event) {
         // settings page.
         if ($route_match->getRouteName() != 'system.site_maintenance_mode') {
           if ($this->account->hasPermission('administer site configuration')) {
-            $this->drupalSetMessage($this->t('Operating in maintenance mode. <a href=":url">Go online.</a>', array(':url' => $this->urlGenerator->generate('system.site_maintenance_mode'))), 'status', FALSE);
+            $this->drupalSetMessage($this->t('Operating in maintenance mode. <a href=":url">Go online.</a>', [':url' => $this->urlGenerator->generate('system.site_maintenance_mode')]), 'status', FALSE);
           }
           else {
             $this->drupalSetMessage($this->t('Operating in maintenance mode.'), 'status', FALSE);
@@ -135,9 +135,9 @@ public function onKernelRequestMaintenance(GetResponseEvent $event) {
    *   The formatted site maintenance message.
    */
   protected function getSiteMaintenanceMessage() {
-    return SafeMarkup::format($this->config->get('system.maintenance')->get('message'), array(
+    return SafeMarkup::format($this->config->get('system.maintenance')->get('message'), [
       '@site' => $this->config->get('system.site')->get('name'),
-    ));
+    ]);
   }
 
   /**
@@ -151,8 +151,8 @@ protected function drupalSetMessage($message = NULL, $type = 'status', $repeat =
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    $events[KernelEvents::REQUEST][] = array('onKernelRequestMaintenance', 30);
-    $events[KernelEvents::EXCEPTION][] = array('onKernelRequestMaintenance');
+    $events[KernelEvents::REQUEST][] = ['onKernelRequestMaintenance', 30];
+    $events[KernelEvents::EXCEPTION][] = ['onKernelRequestMaintenance'];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/MenuRouterRebuildSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/MenuRouterRebuildSubscriber.php
index dc84a57c47f9d40058149af998de435dc24228d6..1bc662c54df4b7f12a1ebe2159ab5b88633288e1 100644
--- a/core/lib/Drupal/Core/EventSubscriber/MenuRouterRebuildSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/MenuRouterRebuildSubscriber.php
@@ -47,7 +47,7 @@ public function __construct(LockBackendInterface $lock, MenuLinkManagerInterface
    */
   public function onRouterRebuild(Event $event) {
     $this->menuLinksRebuild();
-    Cache::invalidateTags(array('local_task'));
+    Cache::invalidateTags(['local_task']);
   }
 
   /**
@@ -82,7 +82,7 @@ protected function menuLinksRebuild() {
    */
   static function getSubscribedEvents() {
     // Run after CachedRouteRebuildSubscriber.
-    $events[RoutingEvents::FINISHED][] = array('onRouterRebuild', 100);
+    $events[RoutingEvents::FINISHED][] = ['onRouterRebuild', 100];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/ParamConverterSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ParamConverterSubscriber.php
index 271ddbee67dc6a36c76cac5e0f956fc6894cd981..19590ae6dd00cb547ae4327bf323b35437699b01 100644
--- a/core/lib/Drupal/Core/EventSubscriber/ParamConverterSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ParamConverterSubscriber.php
@@ -45,7 +45,7 @@ public function onRoutingRouteAlterSetParameterConverters(RouteBuildEvent $event
    */
   static function getSubscribedEvents() {
     // Run after \Drupal\system\EventSubscriber\AdminRouteSubscriber.
-    $events[RoutingEvents::ALTER][] = array('onRoutingRouteAlterSetParameterConverters', -220);
+    $events[RoutingEvents::ALTER][] = ['onRoutingRouteAlterSetParameterConverters', -220];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/PathRootsSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/PathRootsSubscriber.php
index a0bd7b06400a4f5a31ebc35b50f3d90d5f1e7d1c..0ded041a26b1bf012370cf04a92965bf6edf99ba 100644
--- a/core/lib/Drupal/Core/EventSubscriber/PathRootsSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/PathRootsSubscriber.php
@@ -65,10 +65,10 @@ public function onRouteFinished() {
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    $events = array();
+    $events = [];
     // Try to set a low priority to ensure that all routes are already added.
-    $events[RoutingEvents::ALTER][] = array('onRouteAlter', -1024);
-    $events[RoutingEvents::FINISHED][] = array('onRouteFinished');
+    $events[RoutingEvents::ALTER][] = ['onRouteAlter', -1024];
+    $events[RoutingEvents::FINISHED][] = ['onRouteFinished'];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php
index 77dbdbc993c5dfbde9e2dd92cbbb52a5b82ec3b4..737c77cd16772f0f07087c1021e87176bde5c11f 100644
--- a/core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php
@@ -71,8 +71,8 @@ public function onKernelTerminate(PostResponseEvent $event) {
    *   An array of event listener definitions.
    */
   static function getSubscribedEvents() {
-    $events[KernelEvents::CONTROLLER][] = array('onKernelController', 200);
-    $events[KernelEvents::TERMINATE][] = array('onKernelTerminate', 200);
+    $events[KernelEvents::CONTROLLER][] = ['onKernelController', 200];
+    $events[KernelEvents::TERMINATE][] = ['onKernelTerminate', 200];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/RedirectResponseSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/RedirectResponseSubscriber.php
index b9a64d51ba66839d35ff614a0afbe57967f9c8b4..bf5ca05dbe460606d7aae90b206be54a20cbe69c 100644
--- a/core/lib/Drupal/Core/EventSubscriber/RedirectResponseSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/RedirectResponseSubscriber.php
@@ -166,8 +166,8 @@ public function sanitizeDestination(GetResponseEvent $event) {
    *   An array of event listener definitions.
    */
   static function getSubscribedEvents() {
-    $events[KernelEvents::RESPONSE][] = array('checkRedirectUrl');
-    $events[KernelEvents::REQUEST][] = array('sanitizeDestination', 100);
+    $events[KernelEvents::RESPONSE][] = ['checkRedirectUrl'];
+    $events[KernelEvents::REQUEST][] = ['sanitizeDestination', 100];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/ReplicaDatabaseIgnoreSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ReplicaDatabaseIgnoreSubscriber.php
index 64968ba8af79d9bee8c8a57d9b019ef6b50e3223..b0228f888fb3fabba134a654af3a7e0b31f76306 100644
--- a/core/lib/Drupal/Core/EventSubscriber/ReplicaDatabaseIgnoreSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ReplicaDatabaseIgnoreSubscriber.php
@@ -48,7 +48,7 @@ public function checkReplicaServer(GetResponseEvent $event) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[KernelEvents::REQUEST][] = array('checkReplicaServer');
+    $events[KernelEvents::REQUEST][] = ['checkReplicaServer'];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/RequestCloseSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/RequestCloseSubscriber.php
index 7431e96cb182d737aadbcb129b2bcb9fcf0ff488..765b1deb8c1c6ee3a5ea136dbc7cfb066eb47f92 100644
--- a/core/lib/Drupal/Core/EventSubscriber/RequestCloseSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/RequestCloseSubscriber.php
@@ -49,7 +49,7 @@ public function onTerminate(PostResponseEvent $event) {
    *   An array of event listener definitions.
    */
   static function getSubscribedEvents() {
-    $events[KernelEvents::TERMINATE][] = array('onTerminate', 100);
+    $events[KernelEvents::TERMINATE][] = ['onTerminate', 100];
 
     return $events;
   }
diff --git a/core/lib/Drupal/Core/EventSubscriber/RouteEnhancerSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/RouteEnhancerSubscriber.php
index ebc699b592285e91e5ac98361cd38bc18fd101bb..f12174a6bbab66b0feff383f2c23b1d8ea3626e6 100644
--- a/core/lib/Drupal/Core/EventSubscriber/RouteEnhancerSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/RouteEnhancerSubscriber.php
@@ -41,7 +41,7 @@ public function onRouteAlter(RouteBuildEvent $event) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[RoutingEvents::ALTER][] = array('onRouteAlter', -300);
+    $events[RoutingEvents::ALTER][] = ['onRouteAlter', -300];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/RouteFilterSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/RouteFilterSubscriber.php
index 901aa0c9b854f0ebf363d481b72604794f44e26c..79f98a43074d4206844b6ff24ea4cf9198491b3d 100644
--- a/core/lib/Drupal/Core/EventSubscriber/RouteFilterSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/RouteFilterSubscriber.php
@@ -43,7 +43,7 @@ public function onRouteAlter(RouteBuildEvent $event) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[RoutingEvents::ALTER][] = array('onRouteAlter', -300);
+    $events[RoutingEvents::ALTER][] = ['onRouteAlter', -300];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/RouteMethodSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/RouteMethodSubscriber.php
index c88e306193e51d60456890331fbf7707de665439..b43ebf4b8bd636e762aafcaf5ac36aa50e8d7d69 100644
--- a/core/lib/Drupal/Core/EventSubscriber/RouteMethodSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/RouteMethodSubscriber.php
@@ -27,7 +27,7 @@ public function onRouteBuilding(RouteBuildEvent $event) {
     foreach ($event->getRouteCollection() as $route) {
       $methods = $route->getMethods();
       if (empty($methods)) {
-        $route->setMethods(array('GET', 'POST'));
+        $route->setMethods(['GET', 'POST']);
       }
     }
   }
@@ -38,7 +38,7 @@ public function onRouteBuilding(RouteBuildEvent $event) {
   static function getSubscribedEvents() {
     // Set a higher priority to ensure that routes get the default HTTP methods
     // as early as possible.
-    $events[RoutingEvents::ALTER][] = array('onRouteBuilding', 5000);
+    $events[RoutingEvents::ALTER][] = ['onRouteBuilding', 5000];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/EventSubscriber/SpecialAttributesRouteSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/SpecialAttributesRouteSubscriber.php
index 85489cca953c15eeb114421bd4445867788c2223..0f40c5a58ebade7e75f046bf2ec775055ba0be3f 100644
--- a/core/lib/Drupal/Core/EventSubscriber/SpecialAttributesRouteSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/SpecialAttributesRouteSubscriber.php
@@ -16,7 +16,7 @@ class SpecialAttributesRouteSubscriber extends RouteSubscriberBase {
    * {@inheritdoc}
    */
   protected function alterRoutes(RouteCollection $collection) {
-    $special_variables = array(
+    $special_variables = [
       'system_path',
       '_legacy',
       '_raw_variables',
@@ -25,7 +25,7 @@ protected function alterRoutes(RouteCollection $collection) {
       '_content',
       '_controller',
       '_form',
-    );
+    ];
     foreach ($collection->all() as $name => $route) {
       if ($not_allowed_variables = array_intersect($route->compile()->getVariables(), $special_variables)) {
         $reserved = implode(', ', $not_allowed_variables);
diff --git a/core/lib/Drupal/Core/Executable/ExecutablePluginBase.php b/core/lib/Drupal/Core/Executable/ExecutablePluginBase.php
index 9970bf0cdd3fb9c972518ba3cc8533f0bc3a1ecf..0b758c60c713120f27280f60c6fd4dcad29dfcb5 100644
--- a/core/lib/Drupal/Core/Executable/ExecutablePluginBase.php
+++ b/core/lib/Drupal/Core/Executable/ExecutablePluginBase.php
@@ -24,7 +24,7 @@ public function getConfigDefinitions() {
     if (!empty($definition['configuration'])) {
       return $definition['configuration'];
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Extension/Discovery/RecursiveExtensionFilterIterator.php b/core/lib/Drupal/Core/Extension/Discovery/RecursiveExtensionFilterIterator.php
index 5c3ebc32b427635b9a848f5a1e60189155a66dc9..ac69f01a0caeffbb0ba795672368fbd83aea1b14 100644
--- a/core/lib/Drupal/Core/Extension/Discovery/RecursiveExtensionFilterIterator.php
+++ b/core/lib/Drupal/Core/Extension/Discovery/RecursiveExtensionFilterIterator.php
@@ -38,11 +38,11 @@ class RecursiveExtensionFilterIterator extends \RecursiveFilterIterator {
    *
    * @var array
    */
-  protected $whitelist = array(
+  protected $whitelist = [
     'profiles',
     'modules',
     'themes',
-  );
+  ];
 
   /**
    * List of directory names to skip when recursing.
@@ -53,7 +53,7 @@ class RecursiveExtensionFilterIterator extends \RecursiveFilterIterator {
    *
    * @var array
    */
-  protected $blacklist = array(
+  protected $blacklist = [
     // Object-oriented code subdirectories.
     'src',
     'lib',
@@ -72,7 +72,7 @@ class RecursiveExtensionFilterIterator extends \RecursiveFilterIterator {
     'fixtures',
     // @todo ./tests/Drupal should be ./tests/src/Drupal
     'Drupal',
-  );
+  ];
 
   /**
    * Whether to include test directories when recursing.
diff --git a/core/lib/Drupal/Core/Extension/Extension.php b/core/lib/Drupal/Core/Extension/Extension.php
index 02387147b983977790b51e8e5c4be46985b02f0e..7cb6b56be85bab202a44e55b36fb2e85cc5b63cd 100644
--- a/core/lib/Drupal/Core/Extension/Extension.php
+++ b/core/lib/Drupal/Core/Extension/Extension.php
@@ -152,7 +152,7 @@ public function __call($method, array $args) {
     if (!isset($this->splFileInfo)) {
       $this->splFileInfo = new \SplFileInfo($this->pathname);
     }
-    return call_user_func_array(array($this->splFileInfo, $method), $args);
+    return call_user_func_array([$this->splFileInfo, $method], $args);
   }
 
   /**
@@ -163,11 +163,11 @@ public function __call($method, array $args) {
   public function serialize() {
     // Don't serialize the app root, since this could change if the install is
     // moved.
-    $data = array(
+    $data = [
       'type' => $this->type,
       'pathname' => $this->pathname,
       'filename' => $this->filename,
-    );
+    ];
 
     // @todo ThemeHandler::listInfo(), ThemeHandler::rebuildThemeData(), and
     //   system_list() are adding custom properties to the Extension object.
diff --git a/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php b/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php
index 177f011259cc0e640ce6368413eb7cba974c409d..836bee87f7bcf502b211bd7871eca252b8be492f 100644
--- a/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php
+++ b/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php
@@ -61,7 +61,7 @@ class ExtensionDiscovery {
    *
    * @var array
    */
-  protected static $files = array();
+  protected static $files = [];
 
   /**
    * List of installation profile directories to additionally scan.
@@ -198,7 +198,7 @@ public function scan($type, $include_tests = NULL) {
       $include_tests = Settings::get('extension_discovery_scan_tests') || drupal_valid_test_ua();
     }
 
-    $files = array();
+    $files = [];
     foreach ($searchdirs as $dir) {
       // Discover all extensions in the directory, unless we did already.
       if (!isset(static::$files[$this->root][$dir][$include_tests])) {
@@ -227,7 +227,7 @@ public function scan($type, $include_tests = NULL) {
    * @return $this
    */
   public function setProfileDirectoriesFromSettings() {
-    $this->profileDirectories = array();
+    $this->profileDirectories = [];
     $profile = drupal_get_profile();
     // For SimpleTest to be able to test modules packaged together with a
     // distribution we need to include the profile of the parent site (in
@@ -316,8 +316,8 @@ protected function filterByProfileDirectories(array $all_files) {
    *   The sorted list of extensions.
    */
   protected function sort(array $all_files, array $weights) {
-    $origins = array();
-    $profiles = array();
+    $origins = [];
+    $profiles = [];
     foreach ($all_files as $key => $file) {
       // If the extension does not belong to a profile, just apply the weight
       // of the originating directory.
@@ -371,7 +371,7 @@ protected function sort(array $all_files, array $weights) {
    *   The filtered list of extensions, keyed by extension name.
    */
   protected function process(array $all_files) {
-    $files = array();
+    $files = [];
     // Duplicate files found in later search directories take precedence over
     // earlier ones; they replace the extension in the existing $files array.
     foreach ($all_files as $file) {
@@ -397,7 +397,7 @@ protected function process(array $all_files) {
    * @see \Drupal\Core\Extension\Discovery\RecursiveExtensionFilterIterator
    */
   protected function scanDirectory($dir, $include_tests) {
-    $files = array();
+    $files = [];
 
     // In order to scan top-level directories, absolute directory paths have to
     // be used (which also improves performance, since any configured PHP
diff --git a/core/lib/Drupal/Core/Extension/InfoParser.php b/core/lib/Drupal/Core/Extension/InfoParser.php
index 4981885bd7094986cdfeec1831d6e67a6f498e4e..594a83ee6982f1305d28086c25a4c1c72b86c54e 100644
--- a/core/lib/Drupal/Core/Extension/InfoParser.php
+++ b/core/lib/Drupal/Core/Extension/InfoParser.php
@@ -12,7 +12,7 @@ class InfoParser extends InfoParserDynamic {
    *
    * @var array
    */
-  protected static $parsedInfos = array();
+  protected static $parsedInfos = [];
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Extension/InfoParserDynamic.php b/core/lib/Drupal/Core/Extension/InfoParserDynamic.php
index 914bb5df6a8df80230105428800c37deee771b3a..3b00cea0930f9060f19bdab73eaac85b2511fed1 100644
--- a/core/lib/Drupal/Core/Extension/InfoParserDynamic.php
+++ b/core/lib/Drupal/Core/Extension/InfoParserDynamic.php
@@ -15,7 +15,7 @@ class InfoParserDynamic implements InfoParserInterface {
    */
   public function parse($filename) {
     if (!file_exists($filename)) {
-      $parsed_info = array();
+      $parsed_info = [];
     }
     else {
       try {
@@ -42,7 +42,7 @@ public function parse($filename) {
    *   An array of required keys.
    */
   protected function getRequiredKeys() {
-    return array('type', 'core', 'name');
+    return ['type', 'core', 'name'];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Extension/ModuleHandler.php b/core/lib/Drupal/Core/Extension/ModuleHandler.php
index f857bf10ae04ac2da37808b24e821a8c58604cf6..cfbaa61a8e4129acb5818ab59df108943c6d9750 100644
--- a/core/lib/Drupal/Core/Extension/ModuleHandler.php
+++ b/core/lib/Drupal/Core/Extension/ModuleHandler.php
@@ -106,9 +106,9 @@ class ModuleHandler implements ModuleHandlerInterface {
    * @see \Drupal\Core\DrupalKernel
    * @see \Drupal\Core\CoreServiceProvider
    */
-  public function __construct($root, array $module_list = array(), CacheBackendInterface $cache_backend) {
+  public function __construct($root, array $module_list = [], CacheBackendInterface $cache_backend) {
     $this->root = $root;
-    $this->moduleList = array();
+    $this->moduleList = [];
     foreach ($module_list as $name => $module) {
       $this->moduleList[$name] = new Extension($this->root, $module['type'], $module['pathname'], $module['filename']);
     }
@@ -178,7 +178,7 @@ public function getModule($name) {
   /**
    * {@inheritdoc}
    */
-  public function setModuleList(array $module_list = array()) {
+  public function setModuleList(array $module_list = []) {
     $this->moduleList = $module_list;
     // Reset the implementations, so a new call triggers a reloading of the
     // available hooks.
@@ -221,7 +221,7 @@ protected function add($type, $name, $path) {
    */
   public function buildModuleDependencies(array $modules) {
     foreach ($modules as $module) {
-      $graph[$module->getName()]['edges'] = array();
+      $graph[$module->getName()]['edges'] = [];
       if (isset($module->info['dependencies']) && is_array($module->info['dependencies'])) {
         foreach ($module->info['dependencies'] as $dependency) {
           $dependency_data = static::parseDependency($dependency);
@@ -232,8 +232,8 @@ public function buildModuleDependencies(array $modules) {
     $graph_object = new Graph($graph);
     $graph = $graph_object->searchAndSort();
     foreach ($graph as $module_name => $data) {
-      $modules[$module_name]->required_by = isset($data['reverse_paths']) ? $data['reverse_paths'] : array();
-      $modules[$module_name]->requires = isset($data['paths']) ? $data['paths'] : array();
+      $modules[$module_name]->required_by = isset($data['reverse_paths']) ? $data['reverse_paths'] : [];
+      $modules[$module_name]->requires = isset($data['paths']) ? $data['paths'] : [];
       $modules[$module_name]->sort = $data['weight'];
     }
     return $modules;
@@ -305,7 +305,7 @@ public function getHookInfo() {
    * @see \Drupal\Core\Extension\ModuleHandler::getHookInfo()
    */
   protected function buildHookInfo() {
-    $this->hookInfo = array();
+    $this->hookInfo = [];
     // Make sure that the modules are loaded before checking.
     $this->reload();
     // $this->invokeAll() would cause an infinite recursion.
@@ -356,7 +356,7 @@ public function resetImplementations() {
     // invoked, since this can quickly lead to
     // \Drupal::moduleHandler()->implementsHook() being called several thousand
     // times per request.
-    $this->cacheBackend->set('module_implements', array());
+    $this->cacheBackend->set('module_implements', []);
     $this->cacheBackend->delete('hook_info');
   }
 
@@ -383,7 +383,7 @@ public function implementsHook($module, $hook) {
   /**
    * {@inheritdoc}
    */
-  public function invoke($module, $hook, array $args = array()) {
+  public function invoke($module, $hook, array $args = []) {
     if (!$this->implementsHook($module, $hook)) {
       return;
     }
@@ -394,8 +394,8 @@ public function invoke($module, $hook, array $args = array()) {
   /**
    * {@inheritdoc}
    */
-  public function invokeAll($hook, array $args = array()) {
-    $return = array();
+  public function invokeAll($hook, array $args = []) {
+    $return = [];
     $implementations = $this->getImplementations($hook);
     foreach ($implementations as $module) {
       $function = $module . '_' . $hook;
@@ -438,7 +438,7 @@ public function alter($type, &$data, &$context1 = NULL, &$context2 = NULL) {
     // list of functions to call, and on subsequent calls, iterate through them
     // quickly.
     if (!isset($this->alterFunctions[$cid])) {
-      $this->alterFunctions[$cid] = array();
+      $this->alterFunctions[$cid] = [];
       $hook = $type . '_alter';
       $modules = $this->getImplementations($hook);
       if (!isset($extra_types)) {
@@ -452,7 +452,7 @@ public function alter($type, &$data, &$context1 = NULL, &$context2 = NULL) {
       else {
         // For multiple hooks, we need $modules to contain every module that
         // implements at least one of them.
-        $extra_modules = array();
+        $extra_modules = [];
         foreach ($extra_types as $extra_type) {
           $extra_modules = array_merge($extra_modules, $this->getImplementations($extra_type . '_alter'));
         }
@@ -516,8 +516,8 @@ public function alter($type, &$data, &$context1 = NULL, &$context2 = NULL) {
    */
   protected function getImplementationInfo($hook) {
     if (!isset($this->implementations)) {
-      $this->implementations = array();
-      $this->verified = array();
+      $this->implementations = [];
+      $this->verified = [];
       if ($cache = $this->cacheBackend->get('module_implements')) {
         $this->implementations = $cache->data;
       }
@@ -561,7 +561,7 @@ protected function getImplementationInfo($hook) {
    * @see \Drupal\Core\Extension\ModuleHandler::getImplementationInfo()
    */
   protected function buildImplementationInfo($hook) {
-    $implementations = array();
+    $implementations = [];
     $hook_info = $this->getHookInfo();
     foreach ($this->moduleList as $module => $extension) {
       $include_file = isset($hook_info[$hook]['group']) && $this->loadInclude($module, 'inc', $module . '.' . $hook_info[$hook]['group']);
@@ -658,7 +658,7 @@ protected function verifyImplementations(&$implementations, $hook) {
    * @see drupal_check_incompatibility()
    */
   public static function parseDependency($dependency) {
-    $value = array();
+    $value = [];
     // Split out the optional project name.
     if (strpos($dependency, ':') !== FALSE) {
       list($project_name, $dependency) = explode(':', $dependency);
@@ -691,11 +691,11 @@ public static function parseDependency($dependency) {
             }
             // Equivalence can be checked by adding two restrictions.
             if ($op == '=' || $op == '==') {
-              $value['versions'][] = array('op' => '<', 'version' => ($matches['major'] + 1) . '.x');
+              $value['versions'][] = ['op' => '<', 'version' => ($matches['major'] + 1) . '.x'];
               $op = '>=';
             }
           }
-          $value['versions'][] = array('op' => $op, 'version' => $matches['major'] . '.' . $matches['minor']);
+          $value['versions'][] = ['op' => $op, 'version' => $matches['major'] . '.' . $matches['minor']];
         }
       }
     }
@@ -706,7 +706,7 @@ public static function parseDependency($dependency) {
    * {@inheritdoc}
    */
   public function getModuleDirectories() {
-    $dirs = array();
+    $dirs = [];
     foreach ($this->getModuleList() as $name => $module) {
       $dirs[$name] = $this->root . '/' . $module->getPath();
     }
diff --git a/core/lib/Drupal/Core/Extension/ModuleHandlerInterface.php b/core/lib/Drupal/Core/Extension/ModuleHandlerInterface.php
index e0336dd0a07e78e56286ff8f7c3c63a2295416b6..6b2738c779300ea16a44022e08bbbf30d815cc29 100644
--- a/core/lib/Drupal/Core/Extension/ModuleHandlerInterface.php
+++ b/core/lib/Drupal/Core/Extension/ModuleHandlerInterface.php
@@ -73,7 +73,7 @@ public function getModule($name);
    *   An associative array whose keys are the names of the modules and whose
    *   values are Extension objects.
    */
-  public function setModuleList(array $module_list = array());
+  public function setModuleList(array $module_list = []);
 
   /**
    * Adds a module to the list of currently active modules.
@@ -220,7 +220,7 @@ public function implementsHook($module, $hook);
    * @return mixed
    *   The return value of the hook implementation.
    */
-  public function invoke($module, $hook, array $args = array());
+  public function invoke($module, $hook, array $args = []);
 
   /**
    * Invokes a hook in all enabled modules that implement it.
@@ -236,7 +236,7 @@ public function invoke($module, $hook, array $args = array());
    *   recursively. Note: integer keys in arrays will be lost, as the merge is
    *   done using array_merge_recursive().
    */
-  public function invokeAll($hook, array $args = array());
+  public function invokeAll($hook, array $args = []);
 
   /**
    * Passes alterable variables to specific hook_TYPE_alter() implementations.
diff --git a/core/lib/Drupal/Core/Extension/ModuleInstaller.php b/core/lib/Drupal/Core/Extension/ModuleInstaller.php
index c3dbcc86ac0cb7911b3af81a54ed80e787134b1b..f9500a5fc7db9c005b131c9511a92e1f0f8ab408 100644
--- a/core/lib/Drupal/Core/Extension/ModuleInstaller.php
+++ b/core/lib/Drupal/Core/Extension/ModuleInstaller.php
@@ -79,14 +79,14 @@ public function install(array $module_list, $enable_dependencies = TRUE) {
     if ($enable_dependencies) {
       // Get all module data so we can find dependencies and sort.
       $module_data = system_rebuild_module_data();
-      $module_list = $module_list ? array_combine($module_list, $module_list) : array();
+      $module_list = $module_list ? array_combine($module_list, $module_list) : [];
       if ($missing_modules = array_diff_key($module_list, $module_data)) {
         // One or more of the given modules doesn't exist.
         throw new MissingDependencyException(sprintf('Unable to install modules %s due to missing modules %s.', implode(', ', $module_list), implode(', ', $missing_modules)));
       }
 
       // Only process currently uninstalled modules.
-      $installed_modules = $extension_config->get('module') ?: array();
+      $installed_modules = $extension_config->get('module') ?: [];
       if (!$module_list = array_diff_key($module_list, $installed_modules)) {
         // Nothing to do. All modules already installed.
         return TRUE;
@@ -127,7 +127,7 @@ public function install(array $module_list, $enable_dependencies = TRUE) {
     if ($sync_status) {
       $source_storage = $config_installer->getSourceStorage();
     }
-    $modules_installed = array();
+    $modules_installed = [];
     foreach ($module_list as $module) {
       $enabled = $extension_config->get("module.$module") !== NULL;
       if (!$enabled) {
@@ -160,7 +160,7 @@ public function install(array $module_list, $enable_dependencies = TRUE) {
         $current_module_filenames = $this->moduleHandler->getModuleList();
         $current_modules = array_fill_keys(array_keys($current_module_filenames), 0);
         $current_modules = module_config_sort(array_merge($current_modules, $extension_config->get('module')));
-        $module_filenames = array();
+        $module_filenames = [];
         foreach ($current_modules as $name => $weight) {
           if (isset($current_module_filenames[$name])) {
             $module_filenames[$name] = $current_module_filenames[$name];
@@ -191,7 +191,7 @@ public function install(array $module_list, $enable_dependencies = TRUE) {
         $this->updateKernel($module_filenames);
 
         // Allow modules to react prior to the installation of a module.
-        $this->moduleHandler->invokeAll('module_preinstall', array($module));
+        $this->moduleHandler->invokeAll('module_preinstall', [$module]);
 
         // Now install the module's schema if necessary.
         drupal_install_schema($module);
@@ -287,7 +287,7 @@ public function install(array $module_list, $enable_dependencies = TRUE) {
         $this->moduleHandler->invoke($module, 'install');
 
         // Record the fact that it was installed.
-        \Drupal::logger('system')->info('%module module installed.', array('%module' => $module));
+        \Drupal::logger('system')->info('%module module installed.', ['%module' => $module]);
       }
     }
 
@@ -302,7 +302,7 @@ public function install(array $module_list, $enable_dependencies = TRUE) {
         \Drupal::service('router.builder')->rebuild();
       }
 
-      $this->moduleHandler->invokeAll('modules_installed', array($modules_installed));
+      $this->moduleHandler->invokeAll('modules_installed', [$modules_installed]);
     }
 
     return TRUE;
@@ -314,14 +314,14 @@ public function install(array $module_list, $enable_dependencies = TRUE) {
   public function uninstall(array $module_list, $uninstall_dependents = TRUE) {
     // Get all module data so we can find dependencies and sort.
     $module_data = system_rebuild_module_data();
-    $module_list = $module_list ? array_combine($module_list, $module_list) : array();
+    $module_list = $module_list ? array_combine($module_list, $module_list) : [];
     if (array_diff_key($module_list, $module_data)) {
       // One or more of the given modules doesn't exist.
       return FALSE;
     }
 
     $extension_config = \Drupal::configFactory()->getEditable('core.extension');
-    $installed_modules = $extension_config->get('module') ?: array();
+    $installed_modules = $extension_config->get('module') ?: [];
     if (!$module_list = array_intersect_key($module_list, $installed_modules)) {
       // Nothing to do. All modules already uninstalled.
       return TRUE;
@@ -381,7 +381,7 @@ public function uninstall(array $module_list, $uninstall_dependents = TRUE) {
       }
 
       // Allow modules to react prior to the uninstallation of a module.
-      $this->moduleHandler->invokeAll('module_preuninstall', array($module));
+      $this->moduleHandler->invokeAll('module_preuninstall', [$module]);
 
       // Uninstall the module.
       module_load_install($module);
@@ -457,7 +457,7 @@ public function uninstall(array $module_list, $uninstall_dependents = TRUE) {
       // @see https://www.drupal.org/node/2208429
       \Drupal::service('theme_handler')->refreshInfo();
 
-      \Drupal::logger('system')->info('%module module uninstalled.', array('%module' => $module));
+      \Drupal::logger('system')->info('%module module uninstalled.', ['%module' => $module]);
 
       $schema_store = \Drupal::keyValue('system.schema');
       $schema_store->delete($module);
@@ -474,7 +474,7 @@ public function uninstall(array $module_list, $uninstall_dependents = TRUE) {
     drupal_get_installed_schema_version(NULL, TRUE);
 
     // Let other modules react.
-    $this->moduleHandler->invokeAll('modules_uninstalled', array($module_list));
+    $this->moduleHandler->invokeAll('modules_uninstalled', [$module_list]);
 
     // Flush all persistent caches.
     // Any cache entry might implicitly depend on the uninstalled modules,
@@ -509,14 +509,14 @@ protected function removeCacheBins($module) {
                 try {
                   $factory = \Drupal::service($definition['factory_service']);
                   if (method_exists($factory, $definition['factory_method'])) {
-                    $backend = call_user_func_array(array($factory, $definition['factory_method']), $definition['arguments']);
+                    $backend = call_user_func_array([$factory, $definition['factory_method']], $definition['arguments']);
                     if ($backend instanceof CacheBackendInterface) {
                       $backend->removeBin();
                     }
                   }
                 }
                 catch (\Exception $e) {
-                  watchdog_exception('system', $e, 'Failed to remove cache bin defined by the service %id.', array('%id' => $id));
+                  watchdog_exception('system', $e, 'Failed to remove cache bin defined by the service %id.', ['%id' => $id]);
                 }
               }
             }
@@ -548,13 +548,13 @@ protected function updateKernel($module_filenames) {
    * {@inheritdoc}
    */
   public function validateUninstall(array $module_list) {
-    $reasons = array();
+    $reasons = [];
     foreach ($module_list as $module) {
       foreach ($this->uninstallValidators as $validator) {
         $validation_reasons = $validator->validate($module);
         if (!empty($validation_reasons)) {
           if (!isset($reasons[$module])) {
-            $reasons[$module] = array();
+            $reasons[$module] = [];
           }
           $reasons[$module] = array_merge($reasons[$module], $validation_reasons);
         }
diff --git a/core/lib/Drupal/Core/Extension/ThemeHandler.php b/core/lib/Drupal/Core/Extension/ThemeHandler.php
index 3363efc5188311c69eb6f134e7464c1d4d450830..2fd75e190cabdf6259aa169841da84332e9c71a8 100644
--- a/core/lib/Drupal/Core/Extension/ThemeHandler.php
+++ b/core/lib/Drupal/Core/Extension/ThemeHandler.php
@@ -17,13 +17,13 @@ class ThemeHandler implements ThemeHandlerInterface {
    *
    * @see _system_default_theme_features()
    */
-  protected $defaultFeatures = array(
+  protected $defaultFeatures = [
     'favicon',
     'logo',
     'node_user_picture',
     'comment_user_picture',
     'comment_user_verification',
-  );
+  ];
 
   /**
    * A list of all currently available themes.
@@ -178,14 +178,14 @@ public function uninstall(array $theme_list) {
    */
   public function listInfo() {
     if (!isset($this->list)) {
-      $this->list = array();
+      $this->list = [];
       $themes = $this->systemThemeList();
       // @todo Ensure that systemThemeList() does not contain an empty list
       //   during the batch installer, see https://www.drupal.org/node/2322619.
       if (empty($themes)) {
         $this->refreshInfo();
-        $this->list = $this->list ?: array();
-        $themes = \Drupal::state()->get('system.theme.data', array());
+        $this->list = $this->list ?: [];
+        $themes = \Drupal::state()->get('system.theme.data', []);
       }
       foreach ($themes as $theme) {
         $this->addTheme($theme);
@@ -247,13 +247,13 @@ public function rebuildThemeData() {
     $themes = $listing->scan('theme');
     $engines = $listing->scan('theme_engine');
     $extension_config = $this->configFactory->get('core.extension');
-    $installed = $extension_config->get('theme') ?: array();
+    $installed = $extension_config->get('theme') ?: [];
 
     // Set defaults for theme info.
-    $defaults = array(
+    $defaults = [
       'engine' => 'twig',
       'base theme' => 'stable',
-      'regions' => array(
+      'regions' => [
         'sidebar_first' => 'Left sidebar',
         'sidebar_second' => 'Right sidebar',
         'content' => 'Content',
@@ -266,17 +266,17 @@ public function rebuildThemeData() {
         'page_top' => 'Page top',
         'page_bottom' => 'Page bottom',
         'breadcrumb' => 'Breadcrumb',
-      ),
+      ],
       'description' => '',
       'features' => $this->defaultFeatures,
       'screenshot' => 'screenshot.png',
       'php' => DRUPAL_MINIMUM_PHP,
-      'libraries' => array(),
-    );
+      'libraries' => [],
+    ];
 
-    $sub_themes = array();
-    $files_theme = array();
-    $files_theme_engine = array();
+    $sub_themes = [];
+    $files_theme = [];
+    $files_theme_engine = [];
     // Read info files for each theme.
     foreach ($themes as $key => $theme) {
       // @todo Remove all code that relies on the $status property.
@@ -382,18 +382,18 @@ public function getBaseThemes(array $themes, $theme) {
    * @return array
    *   An array of base themes.
    */
-  protected function doGetBaseThemes(array $themes, $theme, $used_themes = array()) {
+  protected function doGetBaseThemes(array $themes, $theme, $used_themes = []) {
     if (!isset($themes[$theme]->info['base theme'])) {
-      return array();
+      return [];
     }
 
     $base_key = $themes[$theme]->info['base theme'];
     // Does the base theme exist?
     if (!isset($themes[$base_key])) {
-      return array($base_key => NULL);
+      return [$base_key => NULL];
     }
 
-    $current_base_theme = array($base_key => $themes[$base_key]->info['name']);
+    $current_base_theme = [$base_key => $themes[$base_key]->info['name']];
 
     // Is the base theme itself a child of another theme?
     if (isset($themes[$base_key]->info['base theme'])) {
@@ -403,7 +403,7 @@ protected function doGetBaseThemes(array $themes, $theme, $used_themes = array()
       }
       // Prevent loops.
       if (!empty($used_themes[$base_key])) {
-        return array($base_key => NULL);
+        return [$base_key => NULL];
       }
       $used_themes[$base_key] = TRUE;
       return $this->doGetBaseThemes($themes, $base_key, $used_themes) + $current_base_theme;
@@ -457,7 +457,7 @@ protected function systemThemeList() {
    * {@inheritdoc}
    */
   public function getThemeDirectories() {
-    $dirs = array();
+    $dirs = [];
     foreach ($this->listInfo() as $name => $theme) {
       $dirs[$name] = $this->root . '/' . $theme->getPath();
     }
diff --git a/core/lib/Drupal/Core/Extension/ThemeInstaller.php b/core/lib/Drupal/Core/Extension/ThemeInstaller.php
index c76e76c07fd6063223857783342042c3694fa353..db1226fa982ae6ae69908c7f8c9c3a396d5f917b 100644
--- a/core/lib/Drupal/Core/Extension/ThemeInstaller.php
+++ b/core/lib/Drupal/Core/Extension/ThemeInstaller.php
@@ -115,7 +115,7 @@ public function install(array $theme_list, $install_dependencies = TRUE) {
       }
 
       // Only process themes that are not installed currently.
-      $installed_themes = $extension_config->get('theme') ?: array();
+      $installed_themes = $extension_config->get('theme') ?: [];
       if (!$theme_list = array_diff_key($theme_list, $installed_themes)) {
         // Nothing to do. All themes already installed.
         return TRUE;
@@ -147,10 +147,10 @@ public function install(array $theme_list, $install_dependencies = TRUE) {
       $theme_list = array_keys($theme_list);
     }
     else {
-      $installed_themes = $extension_config->get('theme') ?: array();
+      $installed_themes = $extension_config->get('theme') ?: [];
     }
 
-    $themes_installed = array();
+    $themes_installed = [];
     foreach ($theme_list as $key) {
       // Only process themes that are not already installed.
       $installed = $extension_config->get("theme.$key") !== NULL;
@@ -179,7 +179,7 @@ public function install(array $theme_list, $install_dependencies = TRUE) {
       $this->themeHandler->addTheme($theme_data[$key]);
 
       // Update the current theme data accordingly.
-      $current_theme_data = $this->state->get('system.theme.data', array());
+      $current_theme_data = $this->state->get('system.theme.data', []);
       $current_theme_data[$key] = $theme_data[$key];
       $this->state->set('system.theme.data', $current_theme_data);
 
@@ -200,14 +200,14 @@ public function install(array $theme_list, $install_dependencies = TRUE) {
       $themes_installed[] = $key;
 
       // Record the fact that it was installed.
-      $this->logger->info('%theme theme installed.', array('%theme' => $key));
+      $this->logger->info('%theme theme installed.', ['%theme' => $key]);
     }
 
     $this->cssCollectionOptimizer->deleteAll();
     $this->resetSystem();
 
     // Invoke hook_themes_installed() after the themes have been installed.
-    $this->moduleHandler->invokeAll('themes_installed', array($themes_installed));
+    $this->moduleHandler->invokeAll('themes_installed', [$themes_installed]);
 
     return !empty($themes_installed);
   }
@@ -244,7 +244,7 @@ public function uninstall(array $theme_list) {
     }
 
     $this->cssCollectionOptimizer->deleteAll();
-    $current_theme_data = $this->state->get('system.theme.data', array());
+    $current_theme_data = $this->state->get('system.theme.data', []);
     foreach ($theme_list as $key) {
       // The value is not used; the weight is ignored for themes currently.
       $extension_config->clear("theme.$key");
@@ -284,7 +284,7 @@ protected function resetSystem() {
 
     // @todo It feels wrong to have the requirement to clear the local tasks
     //   cache here.
-    Cache::invalidateTags(array('local_task'));
+    Cache::invalidateTags(['local_task']);
     $this->themeRegistryRebuild();
   }
 
diff --git a/core/lib/Drupal/Core/Extension/module.api.php b/core/lib/Drupal/Core/Extension/module.api.php
index 74fc76699eab35798124e57d956a02bb4c3a1738..944d3547b78f5463a86dfb1190b03d5793ff1e9e 100644
--- a/core/lib/Drupal/Core/Extension/module.api.php
+++ b/core/lib/Drupal/Core/Extension/module.api.php
@@ -84,12 +84,12 @@
  * @see hook_hook_info_alter()
  */
 function hook_hook_info() {
-  $hooks['token_info'] = array(
+  $hooks['token_info'] = [
     'group' => 'tokens',
-  );
-  $hooks['tokens'] = array(
+  ];
+  $hooks['tokens'] = [
     'group' => 'tokens',
-  );
+  ];
   return $hooks;
 }
 
@@ -398,7 +398,7 @@ function hook_install_tasks(&$install_state) {
   // processor-intensive batch process needs to be triggered later on in the
   // installation.
   $myprofile_needs_batch_processing = \Drupal::state()->get('myprofile.needs_batch_processing', FALSE);
-  $tasks = array(
+  $tasks = [
     // This is an example of a task that defines a form which the user who is
     // installing the site will be asked to fill out. To implement this task,
     // your profile would define a function named myprofile_data_import_form()
@@ -408,10 +408,10 @@ function hook_install_tasks(&$install_state) {
     // \Drupal::state()->set('myprofile.needs_batch_processing', TRUE) if the
     // user has entered data which requires that batch processing will need to
     // occur later on.
-    'myprofile_data_import_form' => array(
+    'myprofile_data_import_form' => [
       'display_name' => t('Data import options'),
       'type' => 'form',
-    ),
+    ],
     // Similarly, to implement this task, your profile would define a function
     // named myprofile_settings_form() with associated validation and submit
     // handlers. This form might be used to collect and save additional
@@ -419,10 +419,10 @@ function hook_install_tasks(&$install_state) {
     // steps required for your profile to act as an "installation wizard"; you
     // can simply define as many tasks of type 'form' as you wish to execute,
     // and the forms will be presented to the user, one after another.
-    'myprofile_settings_form' => array(
+    'myprofile_settings_form' => [
       'display_name' => t('Additional options'),
       'type' => 'form',
-    ),
+    ],
     // This is an example of a task that performs batch operations. To
     // implement this task, your profile would define a function named
     // myprofile_batch_processing() which returns a batch API array definition
@@ -430,12 +430,12 @@ function hook_install_tasks(&$install_state) {
     // 'myprofile.needs_batch_processing' variable used here, this task will be
     // hidden and skipped unless your profile set it to TRUE in one of the
     // previous tasks.
-    'myprofile_batch_processing' => array(
+    'myprofile_batch_processing' => [
       'display_name' => t('Import additional data'),
       'display' => $myprofile_needs_batch_processing,
       'type' => 'batch',
       'run' => $myprofile_needs_batch_processing ? INSTALL_TASK_RUN_IF_NOT_COMPLETED : INSTALL_TASK_SKIP,
-    ),
+    ],
     // This is an example of a task that will not be displayed in the list that
     // the user sees. To implement this task, your profile would define a
     // function named myprofile_final_site_setup(), in which additional,
@@ -449,9 +449,9 @@ function hook_install_tasks(&$install_state) {
     // tasks are complete, with a link to reload the current page and therefore
     // pass on to the final Drupal installation tasks when the user is ready to
     // do so).
-    'myprofile_final_site_setup' => array(
-    ),
-  );
+    'myprofile_final_site_setup' => [
+    ],
+  ];
   return $tasks;
 }
 
@@ -622,12 +622,12 @@ function hook_update_N(&$sandbox) {
 
   // Example function body for adding a field to a database table, which does
   // not require a batch operation:
-  $spec = array(
+  $spec = [
     'type' => 'varchar',
     'description' => "New Col",
     'length' => 20,
     'not null' => FALSE,
-  );
+  ];
   $schema = Database::getConnection()->schema();
   $schema->addField('mytable1', 'newcol', $spec);
 
@@ -647,7 +647,7 @@ function hook_update_N(&$sandbox) {
 
   // Update in chunks of 20.
   $records = Database::getConnection()->select('mytable1', 'm')
-    ->fields('m', array('myprimarykey', 'otherfield'))
+    ->fields('m', ['myprimarykey', 'otherfield'])
     ->condition('myprimarykey', $sandbox['current_pk'], '>')
     ->range(0, 20)
     ->orderBy('myprimarykey', 'ASC')
@@ -656,7 +656,7 @@ function hook_update_N(&$sandbox) {
     // Here, you would make an update something related to this record. In this
     // example, some text is added to the other field.
     Database::getConnection()->update('mytable1')
-      ->fields(array('otherfield' => $record->otherfield . '-suffix'))
+      ->fields(['otherfield' => $record->otherfield . '-suffix'])
       ->condition('myprimarykey', $record->myprimarykey)
       ->execute();
 
@@ -767,9 +767,9 @@ function hook_update_dependencies() {
   // Indicate that the mymodule_update_8001() function provided by this module
   // must run after the another_module_update_8003() function provided by the
   // 'another_module' module.
-  $dependencies['mymodule'][8001] = array(
+  $dependencies['mymodule'][8001] = [
     'another_module' => 8003,
-  );
+  ];
   // Indicate that the mymodule_update_8002() function provided by this module
   // must run before the yet_another_module_update_8005() function provided by
   // the 'yet_another_module' module. (Note that declaring dependencies in this
@@ -777,9 +777,9 @@ function hook_update_dependencies() {
   // following problem: If a site has already run the yet_another_module
   // module's database updates before it updates its codebase to pick up the
   // newest mymodule code, then the dependency declared here will be ignored.)
-  $dependencies['yet_another_module'][8005] = array(
+  $dependencies['yet_another_module'][8005] = [
     'mymodule' => 8002,
-  );
+  ];
   return $dependencies;
 }
 
@@ -834,18 +834,18 @@ function hook_update_last_removed() {
  * @see hook_updater_info_alter()
  */
 function hook_updater_info() {
-  return array(
-    'module' => array(
+  return [
+    'module' => [
       'class' => 'Drupal\Core\Updater\Module',
       'name' => t('Update modules'),
       'weight' => 0,
-    ),
-    'theme' => array(
+    ],
+    'theme' => [
       'class' => 'Drupal\Core\Updater\Theme',
       'name' => t('Update themes'),
       'weight' => 0,
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -928,24 +928,24 @@ function hook_updater_info_alter(&$updaters) {
  *     - REQUIREMENT_ERROR: The requirement failed with an error.
  */
 function hook_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
 
   // Report Drupal version
   if ($phase == 'runtime') {
-    $requirements['drupal'] = array(
+    $requirements['drupal'] = [
       'title' => t('Drupal'),
       'value' => \Drupal::VERSION,
       'severity' => REQUIREMENT_INFO
-    );
+    ];
   }
 
   // Test PHP version
-  $requirements['php'] = array(
+  $requirements['php'] = [
     'title' => t('PHP'),
     'value' => ($phase == 'runtime') ? \Drupal::l(phpversion(), new Url('system.php')) : phpversion(),
-  );
+  ];
   if (version_compare(phpversion(), DRUPAL_MINIMUM_PHP) < 0) {
-    $requirements['php']['description'] = t('Your PHP installation is too old. Drupal requires at least PHP %version.', array('%version' => DRUPAL_MINIMUM_PHP));
+    $requirements['php']['description'] = t('Your PHP installation is too old. Drupal requires at least PHP %version.', ['%version' => DRUPAL_MINIMUM_PHP]);
     $requirements['php']['severity'] = REQUIREMENT_ERROR;
   }
 
@@ -954,17 +954,17 @@ function hook_requirements($phase) {
     $cron_last = \Drupal::state()->get('system.cron_last');
 
     if (is_numeric($cron_last)) {
-      $requirements['cron']['value'] = t('Last run @time ago', array('@time' => \Drupal::service('date.formatter')->formatTimeDiffSince($cron_last)));
+      $requirements['cron']['value'] = t('Last run @time ago', ['@time' => \Drupal::service('date.formatter')->formatTimeDiffSince($cron_last)]);
     }
     else {
-      $requirements['cron'] = array(
-        'description' => t('Cron has not run. It appears cron jobs have not been setup on your system. Check the help pages for <a href=":url">configuring cron jobs</a>.', array(':url' => 'https://www.drupal.org/cron')),
+      $requirements['cron'] = [
+        'description' => t('Cron has not run. It appears cron jobs have not been setup on your system. Check the help pages for <a href=":url">configuring cron jobs</a>.', [':url' => 'https://www.drupal.org/cron']),
         'severity' => REQUIREMENT_ERROR,
         'value' => t('Never run'),
-      );
+      ];
     }
 
-    $requirements['cron']['description'] .= ' ' . t('You can <a href=":cron">run cron manually</a>.', array(':cron' => \Drupal::url('system.run_cron')));
+    $requirements['cron']['description'] .= ' ' . t('You can <a href=":cron">run cron manually</a>.', [':cron' => \Drupal::url('system.run_cron')]);
 
     $requirements['cron']['title'] = t('Cron maintenance tasks');
   }
diff --git a/core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php b/core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php
index 92786b1343797dc2bc5395034e9097a07a53f1f9..1a2439109c0fb13a9b3ee9d6d41c052823fc38d4 100644
--- a/core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php
+++ b/core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php
@@ -61,7 +61,7 @@ class FieldFormatter extends Plugin {
    *
    * @var array
    */
-  public $field_types = array();
+  public $field_types = [];
 
   /**
    * An integer to determine the weight of this formatter relative to other
diff --git a/core/lib/Drupal/Core/Field/Annotation/FieldWidget.php b/core/lib/Drupal/Core/Field/Annotation/FieldWidget.php
index 22d7796e5a585835c54cbae6bd17e66a2173e2c7..38d3f869e54f0bdb5568f89b643a165d1af465ae 100644
--- a/core/lib/Drupal/Core/Field/Annotation/FieldWidget.php
+++ b/core/lib/Drupal/Core/Field/Annotation/FieldWidget.php
@@ -60,7 +60,7 @@ class FieldWidget extends Plugin {
    *
    * @var array
    */
-  public $field_types = array();
+  public $field_types = [];
 
   /**
    * Does the field widget handles multiple values at once.
diff --git a/core/lib/Drupal/Core/Field/BaseFieldDefinition.php b/core/lib/Drupal/Core/Field/BaseFieldDefinition.php
index e703b3852855f0944c8c4b8c630f3cddcf8a0ea9..5194d85e9a2a5d4a927fb79442f89e2574ef4538 100644
--- a/core/lib/Drupal/Core/Field/BaseFieldDefinition.php
+++ b/core/lib/Drupal/Core/Field/BaseFieldDefinition.php
@@ -42,7 +42,7 @@ class BaseFieldDefinition extends ListDataDefinition implements FieldDefinitionI
   /**
    * @var array
    */
-  protected $indexes = array();
+  protected $indexes = [];
 
   /**
    * Creates a new field definition.
@@ -54,7 +54,7 @@ class BaseFieldDefinition extends ListDataDefinition implements FieldDefinitionI
    *   A new field definition object.
    */
   public static function create($type) {
-    $field_definition = new static(array());
+    $field_definition = new static([]);
     $field_definition->type = $type;
     $field_definition->itemDefinition = FieldItemDataDefinition::create($field_definition);
     // Create a definition for the items, and initialize it with the default
@@ -420,7 +420,7 @@ public function setDisplayOptions($display_context, array $options) {
   public function setDisplayConfigurable($display_context, $configurable) {
     // If no explicit display options have been specified, default to 'hidden'.
     if (empty($this->definition['display'][$display_context])) {
-      $this->definition['display'][$display_context]['options'] = array('region' => 'hidden');
+      $this->definition['display'][$display_context]['options'] = ['region' => 'hidden'];
     }
     $this->definition['display'][$display_context]['configurable'] = $configurable;
     return $this;
@@ -469,9 +469,9 @@ public function getDefaultValue(FieldableEntityInterface $entity) {
     if (isset($value) && !is_array($value)) {
       $properties = $this->getPropertyNames();
       $property = reset($properties);
-      $value = array(
-        array($property => $value),
-      );
+      $value = [
+        [$property => $value],
+      ];
     }
     // Allow the field type to process default values.
     $field_item_list_class = $this->getClass();
@@ -488,10 +488,10 @@ public function setDefaultValue($value) {
     // Unless the value is an empty array, we may need to transform it.
     if (!is_array($value) || !empty($value)) {
       if (!is_array($value)) {
-        $value = array(array($this->getMainPropertyName() => $value));
+        $value = [[$this->getMainPropertyName() => $value]];
       }
       elseif (is_array($value) && !is_numeric(array_keys($value)[0])) {
-        $value = array(0 => $value);
+        $value = [0 => $value];
       }
     }
     $this->definition['default_value'] = $value;
@@ -639,12 +639,12 @@ public function getSchema() {
       $class = $definition['class'];
       $schema = $class::schema($this);
       // Fill in default values.
-      $schema += array(
-        'columns' => array(),
-        'unique keys' => array(),
-        'indexes' => array(),
-        'foreign keys' => array(),
-      );
+      $schema += [
+        'columns' => [],
+        'unique keys' => [],
+        'indexes' => [],
+        'foreign keys' => [],
+      ];
 
       // Merge custom indexes with those specified by the field type. Custom
       // indexes prevail.
diff --git a/core/lib/Drupal/Core/Field/EntityReferenceFieldItemList.php b/core/lib/Drupal/Core/Field/EntityReferenceFieldItemList.php
index d21ac9697da86822efb8c53f1396a8fcbaf51d71..0a53d9894a3250ae59f66696536299cc0f858e08 100644
--- a/core/lib/Drupal/Core/Field/EntityReferenceFieldItemList.php
+++ b/core/lib/Drupal/Core/Field/EntityReferenceFieldItemList.php
@@ -25,12 +25,12 @@ public function getConstraints() {
    */
   public function referencedEntities() {
     if (empty($this->list)) {
-      return array();
+      return [];
     }
 
     // Collect the IDs of existing entities to load, and directly grab the
     // "autocreate" entities that are already populated in $item->entity.
-    $target_entities = $ids = array();
+    $target_entities = $ids = [];
     foreach ($this->list as $delta => $item) {
       if ($item->target_id !== NULL) {
         $ids[$delta] = $item->target_id;
@@ -64,7 +64,7 @@ public static function processDefaultValue($default_value, FieldableEntityInterf
 
     if ($default_value) {
       // Convert UUIDs to numeric IDs.
-      $uuids = array();
+      $uuids = [];
       foreach ($default_value as $delta => $properties) {
         if (isset($properties['target_uuid'])) {
           $uuids[$delta] = $properties['target_uuid'];
@@ -79,7 +79,7 @@ public static function processDefaultValue($default_value, FieldableEntityInterf
           ->getStorage($target_type)
           ->loadMultiple($entity_ids);
 
-        $entity_uuids = array();
+        $entity_uuids = [];
         foreach ($entities as $id => $entity) {
           $entity_uuids[$entity->uuid()] = $id;
         }
@@ -107,7 +107,7 @@ public function defaultValuesFormSubmit(array $element, array &$form, FormStateI
     $default_value = parent::defaultValuesFormSubmit($element, $form, $form_state);
 
     // Convert numeric IDs to UUIDs to ensure config deployability.
-    $ids = array();
+    $ids = [];
     foreach ($default_value as $delta => $properties) {
       if (isset($properties['entity']) && $properties['entity']->isNew()) {
         // This may be a newly created term.
diff --git a/core/lib/Drupal/Core/Field/FieldConfigBase.php b/core/lib/Drupal/Core/Field/FieldConfigBase.php
index d7ddd189820d2e548ba76b78a3ea03a32b546dc6..76366bfe21c56ec332eb46fba5698b9762523680 100644
--- a/core/lib/Drupal/Core/Field/FieldConfigBase.php
+++ b/core/lib/Drupal/Core/Field/FieldConfigBase.php
@@ -89,7 +89,7 @@ abstract class FieldConfigBase extends ConfigEntityBase implements FieldConfigIn
    *
    * @var array
    */
-  protected $settings = array();
+  protected $settings = [];
 
   /**
    * Flag indicating whether the field is required.
@@ -139,7 +139,7 @@ abstract class FieldConfigBase extends ConfigEntityBase implements FieldConfigIn
    *
    * @var array
    */
-  protected $default_value = array();
+  protected $default_value = [];
 
   /**
    * The name of a callback function that returns default values.
@@ -413,9 +413,9 @@ public function setDefaultValue($value) {
       $key = $this->getFieldStorageDefinition()->getPropertyNames()[0];
       // Convert to the multi value format to support fields with a cardinality
       // greater than 1.
-      $value = array(
-        array($key => $value),
-      );
+      $value = [
+        [$key => $value],
+      ];
     }
     $this->default_value = $value;
     return $this;
diff --git a/core/lib/Drupal/Core/Field/FieldItemBase.php b/core/lib/Drupal/Core/Field/FieldItemBase.php
index d489c8e1ba443733e0a4ddaa46c1489ae95d1fa6..84d73ec5b35b53d93b6adc77095fd561bf9ab9cb 100644
--- a/core/lib/Drupal/Core/Field/FieldItemBase.php
+++ b/core/lib/Drupal/Core/Field/FieldItemBase.php
@@ -23,14 +23,14 @@ abstract class FieldItemBase extends Map implements FieldItemInterface {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array();
+    return [];
   }
 
   /**
@@ -106,7 +106,7 @@ public function setValue($values, $notify = TRUE) {
     // given.
     if (isset($values) && !is_array($values)) {
       $keys = array_keys($this->definition->getPropertyDefinitions());
-      $values = array($keys[0] => $values);
+      $values = [$keys[0] => $values];
     }
     parent::setValue($values, $notify);
   }
@@ -183,7 +183,7 @@ public function __unset($name) {
   /**
    * {@inheritdoc}
    */
-  public function view($display_options = array()) {
+  public function view($display_options = []) {
     $view_builder = \Drupal::entityManager()->getViewBuilder($this->getEntity()->getEntityTypeId());
     return $view_builder->viewFieldItem($this, $display_options);
   }
@@ -217,14 +217,14 @@ public function deleteRevision() { }
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
-    return array();
+    return [];
   }
 
   /**
@@ -259,7 +259,7 @@ public static function fieldSettingsFromConfigData(array $settings) {
    * {@inheritdoc}
    */
   public static function calculateDependencies(FieldDefinitionInterface $field_definition) {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/FieldItemInterface.php b/core/lib/Drupal/Core/Field/FieldItemInterface.php
index a257dd0f7c239c3934aa11f83e7d06c2c63c348e..69906c1414d1063ee03e5baa6a5a7f7a544cf8af 100644
--- a/core/lib/Drupal/Core/Field/FieldItemInterface.php
+++ b/core/lib/Drupal/Core/Field/FieldItemInterface.php
@@ -173,7 +173,7 @@ public function __unset($property_name);
    * @see \Drupal\Core\Entity\EntityViewBuilderInterface::viewFieldItem()
    * @see \Drupal\Core\Field\FieldItemListInterface::view()
    */
-  public function view($display_options = array());
+  public function view($display_options = []);
 
   /**
    * Defines custom presave behavior for field values.
diff --git a/core/lib/Drupal/Core/Field/FieldItemList.php b/core/lib/Drupal/Core/Field/FieldItemList.php
index 97dd493195aff9010d3a564bcceda40ee77f722a..a1a1ebdb9ebb12c02e3789471d6de1becb1c79ac 100644
--- a/core/lib/Drupal/Core/Field/FieldItemList.php
+++ b/core/lib/Drupal/Core/Field/FieldItemList.php
@@ -24,7 +24,7 @@ class FieldItemList extends ItemList implements FieldItemListInterface {
    *
    * @var \Drupal\Core\Field\FieldItemInterface[]
    */
-  protected $list = array();
+  protected $list = [];
 
   /**
    * The langcode of the field values held in the object.
@@ -99,7 +99,7 @@ public function filterEmptyItems() {
    * @todo Revisit the need when all entity types are converted to NG entities.
    */
   public function getValue($include_computed = FALSE) {
-    $values = array();
+    $values = [];
     foreach ($this->list as $delta => $item) {
       $values[$delta] = $item->getValue($include_computed);
     }
@@ -113,7 +113,7 @@ public function setValue($values, $notify = TRUE) {
     // Support passing in only the value of the first item, either as a literal
     // (value of the first property) or as an array of properties.
     if (isset($values) && (!is_array($values) || (!empty($values) && !is_numeric(current(array_keys($values)))))) {
-      $values = array(0 => $values);
+      $values = [0 => $values];
     }
     parent::setValue($values, $notify);
   }
@@ -249,7 +249,7 @@ protected function delegateMethod($method) {
   /**
    * {@inheritdoc}
    */
-  public function view($display_options = array()) {
+  public function view($display_options = []) {
     $view_builder = \Drupal::entityManager()->getViewBuilder($this->getEntity()->getEntityTypeId());
     return $view_builder->viewField($this, $display_options);
   }
@@ -278,10 +278,10 @@ public function getConstraints() {
     if ($cardinality != FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED) {
       $constraints[] = $this->getTypedDataManager()
         ->getValidationConstraintManager()
-        ->create('Count', array(
+        ->create('Count', [
           'max' => $cardinality,
-          'maxMessage' => t('%name: this field cannot hold more than @count values.', array('%name' => $this->getFieldDefinition()->getLabel(), '@count' => $cardinality)),
-        ));
+          'maxMessage' => t('%name: this field cannot hold more than @count values.', ['%name' => $this->getFieldDefinition()->getLabel(), '@count' => $cardinality]),
+        ]);
     }
 
     return $constraints;
@@ -294,7 +294,7 @@ public function defaultValuesForm(array &$form, FormStateInterface $form_state)
     if (empty($this->getFieldDefinition()->getDefaultValueCallback())) {
       if ($widget = $this->defaultValueWidget($form_state)) {
         // Place the input in a separate place in the submitted values tree.
-        $element = array('#parents' => array('default_value_input'));
+        $element = ['#parents' => ['default_value_input']];
         $element += $widget->form($this, $element, $form_state);
 
         return $element;
@@ -365,7 +365,7 @@ protected function defaultValueWidget(FormStateInterface $form_state) {
       $entity_form_display = entity_get_form_display($entity->getEntityTypeId(), $entity->bundle(), 'default');
       $widget = $entity_form_display->getRenderer($this->getFieldDefinition()->getName());
       if (!$widget) {
-        $widget = \Drupal::service('plugin.manager.field.widget')->getInstance(array('field_definition' => $this->getFieldDefinition()));
+        $widget = \Drupal::service('plugin.manager.field.widget')->getInstance(['field_definition' => $this->getFieldDefinition()]);
       }
 
       $form_state->set('default_value_widget', $widget);
diff --git a/core/lib/Drupal/Core/Field/FieldItemListInterface.php b/core/lib/Drupal/Core/Field/FieldItemListInterface.php
index 4e77202b654dcc73549e022945480d8640e8e70e..c350432e21a7b9cf98c6994ab6a1419d65ec671f 100644
--- a/core/lib/Drupal/Core/Field/FieldItemListInterface.php
+++ b/core/lib/Drupal/Core/Field/FieldItemListInterface.php
@@ -181,7 +181,7 @@ public function deleteRevision();
    * @see \Drupal\Core\Entity\EntityViewBuilderInterface::viewField()
    * @see \Drupal\Core\Field\FieldItemInterface::view()
    */
-  public function view($display_options = array());
+  public function view($display_options = []);
 
   /**
    * Populates a specified number of field items with valid sample data.
diff --git a/core/lib/Drupal/Core/Field/FieldModuleUninstallValidator.php b/core/lib/Drupal/Core/Field/FieldModuleUninstallValidator.php
index 2170b36047c97d9b2446d27b80fc799d7a29204b..08a27cb76ff201c6cd4d7190f1836486087d9467 100644
--- a/core/lib/Drupal/Core/Field/FieldModuleUninstallValidator.php
+++ b/core/lib/Drupal/Core/Field/FieldModuleUninstallValidator.php
@@ -35,7 +35,7 @@ public function __construct(EntityManagerInterface $entity_manager, TranslationI
    * {@inheritdoc}
    */
   public function validate($module_name) {
-    $reasons = array();
+    $reasons = [];
 
     // We skip fields provided by the Field module as it implements field
     // purging.
@@ -49,10 +49,10 @@ public function validate($module_name) {
             if ($storage_definition->getProvider() == $module_name) {
               $storage = $this->entityManager->getStorage($entity_type_id);
               if ($storage instanceof FieldableEntityStorageInterface && $storage->countFieldData($storage_definition, TRUE)) {
-                $reasons[] = $this->t('There is data for the field @field-name on entity type @entity_type', array(
+                $reasons[] = $this->t('There is data for the field @field-name on entity type @entity_type', [
                   '@field-name' => $storage_definition->getName(),
                   '@entity_type' => $entity_type->getLabel(),
-                ));
+                ]);
               }
             }
           }
diff --git a/core/lib/Drupal/Core/Field/FieldStorageDefinitionEventSubscriberTrait.php b/core/lib/Drupal/Core/Field/FieldStorageDefinitionEventSubscriberTrait.php
index 5ac4b6e0d084db69ac6588cd794ed79a82caa9f3..895045bda02ea599c4d173f59153ae0caf7d6967 100644
--- a/core/lib/Drupal/Core/Field/FieldStorageDefinitionEventSubscriberTrait.php
+++ b/core/lib/Drupal/Core/Field/FieldStorageDefinitionEventSubscriberTrait.php
@@ -22,7 +22,7 @@ trait FieldStorageDefinitionEventSubscriberTrait {
    * @see \Symfony\Component\EventDispatcher\EventSubscriberInterface::getSubscribedEvents()
    */
   public static function getFieldStorageDefinitionEvents() {
-    $event = array('onFieldStorageDefinitionEvent', 100);
+    $event = ['onFieldStorageDefinitionEvent', 100];
     $events[FieldStorageDefinitionEvents::CREATE][] = $event;
     $events[FieldStorageDefinitionEvents::UPDATE][] = $event;
     $events[FieldStorageDefinitionEvents::DELETE][] = $event;
diff --git a/core/lib/Drupal/Core/Field/FieldTypePluginManager.php b/core/lib/Drupal/Core/Field/FieldTypePluginManager.php
index 84bb4c0917b5d2b2d222a11cc2da96d591bfed36..905cdb4f1bb1281065a66343d55d187fd5960878 100644
--- a/core/lib/Drupal/Core/Field/FieldTypePluginManager.php
+++ b/core/lib/Drupal/Core/Field/FieldTypePluginManager.php
@@ -61,7 +61,7 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
    * @return \Drupal\Core\Field\FieldItemInterface
    *   The instantiated object.
    */
-  public function createInstance($field_type, array $configuration = array()) {
+  public function createInstance($field_type, array $configuration = []) {
     $configuration['data_definition'] = $configuration['field_definition']->getItemDefinition();
     return $this->typedDataManager->createInstance("field_item:$field_type", $configuration);
   }
@@ -106,7 +106,7 @@ public function getDefaultStorageSettings($type) {
       $plugin_class = DefaultFactory::getPluginClass($type, $plugin_definition);
       return $plugin_class::defaultStorageSettings();
     }
-    return array();
+    return [];
   }
 
   /**
@@ -118,7 +118,7 @@ public function getDefaultFieldSettings($type) {
       $plugin_class = DefaultFactory::getPluginClass($type, $plugin_definition);
       return $plugin_class::defaultFieldSettings();
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/FormatterBase.php b/core/lib/Drupal/Core/Field/FormatterBase.php
index db7587ae25017aab844338c20f58098cd134cb18..3b3abcc61999fe7cad99797a5f86dd1265a4dd34 100644
--- a/core/lib/Drupal/Core/Field/FormatterBase.php
+++ b/core/lib/Drupal/Core/Field/FormatterBase.php
@@ -60,7 +60,7 @@ abstract class FormatterBase extends PluginSettingsBase implements FormatterInte
    *   Any third party settings.
    */
   public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings) {
-    parent::__construct(array(), $plugin_id, $plugin_definition);
+    parent::__construct([], $plugin_id, $plugin_definition);
 
     $this->fieldDefinition = $field_definition;
     $this->settings = $settings;
@@ -85,7 +85,7 @@ public function view(FieldItemListInterface $items, $langcode = NULL) {
       $entity = $items->getEntity();
       $entity_type = $entity->getEntityTypeId();
       $field_name = $this->fieldDefinition->getName();
-      $info = array(
+      $info = [
         '#theme' => 'field',
         '#title' => $this->fieldDefinition->getLabel(),
         '#label_display' => $this->label,
@@ -100,7 +100,7 @@ public function view(FieldItemListInterface $items, $langcode = NULL) {
         '#items' => $items,
         '#formatter' => $this->getPluginId(),
         '#is_multiple' => $this->fieldDefinition->getFieldStorageDefinition()->isMultiple(),
-      );
+      ];
 
       $elements = array_merge($info, $elements);
     }
@@ -112,14 +112,14 @@ public function view(FieldItemListInterface $items, $langcode = NULL) {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/FormatterPluginManager.php b/core/lib/Drupal/Core/Field/FormatterPluginManager.php
index ca9bd06871860343a41b7268fd0af0f8fce20b37..c4df0f5f2fd8c65812d14eed857d0ee96e8a66a3 100644
--- a/core/lib/Drupal/Core/Field/FormatterPluginManager.php
+++ b/core/lib/Drupal/Core/Field/FormatterPluginManager.php
@@ -52,7 +52,7 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $plugin_definition = $this->getDefinition($plugin_id);
     $plugin_class = DefaultFactory::getPluginClass($plugin_id, $plugin_definition);
 
@@ -119,10 +119,10 @@ public function getInstance(array $options) {
       $plugin_id = $field_type_definition['default_formatter'];
     }
 
-    $configuration += array(
+    $configuration += [
       'field_definition' => $field_definition,
       'view_mode' => $options['view_mode'],
-    );
+    ];
     return $this->createInstance($plugin_id, $configuration);
   }
 
@@ -139,11 +139,11 @@ public function getInstance(array $options) {
    */
   public function prepareConfiguration($field_type, array $configuration) {
     // Fill in defaults for missing properties.
-    $configuration += array(
+    $configuration += [
       'label' => 'above',
-      'settings' => array(),
-      'third_party_settings' => array(),
-    );
+      'settings' => [],
+      'third_party_settings' => [],
+    ];
     // If no formatter is specified, use the default formatter.
     if (!isset($configuration['type'])) {
       $field_type = $this->fieldTypeManager->getDefinition($field_type);
@@ -168,10 +168,10 @@ public function prepareConfiguration($field_type, array $configuration) {
    */
   public function getOptions($field_type = NULL) {
     if (!isset($this->formatterOptions)) {
-      $options = array();
+      $options = [];
       $field_types = $this->fieldTypeManager->getDefinitions();
       $formatter_types = $this->getDefinitions();
-      uasort($formatter_types, array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
+      uasort($formatter_types, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
       foreach ($formatter_types as $name => $formatter_type) {
         foreach ($formatter_type['field_types'] as $formatter_field_type) {
           // Check that the field type exists.
@@ -183,7 +183,7 @@ public function getOptions($field_type = NULL) {
       $this->formatterOptions = $options;
     }
     if ($field_type) {
-      return !empty($this->formatterOptions[$field_type]) ? $this->formatterOptions[$field_type] : array();
+      return !empty($this->formatterOptions[$field_type]) ? $this->formatterOptions[$field_type] : [];
     }
     return $this->formatterOptions;
   }
@@ -204,7 +204,7 @@ public function getDefaultSettings($type) {
       $plugin_class = DefaultFactory::getPluginClass($type, $plugin_definition);
       return $plugin_class::defaultSettings();
     }
-    return array();
+    return [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/DataType/Deriver/FieldItemDeriver.php b/core/lib/Drupal/Core/Field/Plugin/DataType/Deriver/FieldItemDeriver.php
index 0d99338872292483fc0900576be5949cf9fa4147..de57317e2b9162daa4d410d2b09faa01a0e6f9e0 100644
--- a/core/lib/Drupal/Core/Field/Plugin/DataType/Deriver/FieldItemDeriver.php
+++ b/core/lib/Drupal/Core/Field/Plugin/DataType/Deriver/FieldItemDeriver.php
@@ -16,7 +16,7 @@ class FieldItemDeriver implements ContainerDeriverInterface {
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * The base plugin ID this derivative is for.
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/BooleanFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/BooleanFormatter.php
index 60c632a449af2bbc7715754673b94c282c20262b..c52a2d7bee721f00346f39080a5b1dff6d34e025 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/BooleanFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/BooleanFormatter.php
@@ -67,10 +67,10 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
     foreach ($this->getOutputFormats() as $format_name => $format) {
       if (is_array($format)) {
         if ($format_name == 'default') {
-          $formats[$format_name] = $this->t('Field settings (@on_label / @off_label)', array('@on_label' => $format[0], '@off_label' => $format[1]));
+          $formats[$format_name] = $this->t('Field settings (@on_label / @off_label)', ['@on_label' => $format[0], '@off_label' => $format[1]]);
         }
         else {
-          $formats[$format_name] = $this->t('@on_label / @off_label', array('@on_label' => $format[0], '@off_label' => $format[1]));
+          $formats[$format_name] = $this->t('@on_label / @off_label', ['@on_label' => $format[0], '@off_label' => $format[1]]);
         }
       }
       else {
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/DecimalFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/DecimalFormatter.php
index 0c389291e875115b209e7497aa38344f84c77d3d..58e8fffc771badbcc360c882608193a9ce75c18b 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/DecimalFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/DecimalFormatter.php
@@ -26,12 +26,12 @@ class DecimalFormatter extends NumericFormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'thousand_separator' => '',
       'decimal_separator' => '.',
       'scale' => 2,
       'prefix_suffix' => TRUE,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -40,22 +40,22 @@ public static function defaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $elements = parent::settingsForm($form, $form_state);
 
-    $elements['decimal_separator'] = array(
+    $elements['decimal_separator'] = [
       '#type' => 'select',
       '#title' => t('Decimal marker'),
-      '#options' => array('.' => t('Decimal point'), ',' => t('Comma')),
+      '#options' => ['.' => t('Decimal point'), ',' => t('Comma')],
       '#default_value' => $this->getSetting('decimal_separator'),
       '#weight' => 5,
-    );
-    $elements['scale'] = array(
+    ];
+    $elements['scale'] = [
       '#type' => 'number',
-      '#title' => t('Scale', array(), array('context' => 'decimal places')),
+      '#title' => t('Scale', [], ['context' => 'decimal places']),
       '#min' => 0,
       '#max' => 10,
       '#default_value' => $this->getSetting('scale'),
       '#description' => t('The number of digits to the right of the decimal.'),
       '#weight' => 6,
-    );
+    ];
 
     return $elements;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
index 2692d84e114d740ca79a142e10e85b9a0f401ce3..af994361fa07090ef5dcfe0d48aa4f8f829dc159 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
@@ -118,23 +118,23 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'view_mode' => 'default',
       'link' => FALSE,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $elements['view_mode'] = array(
+    $elements['view_mode'] = [
       '#type' => 'select',
       '#options' => $this->entityDisplayRepository->getViewModeOptions($this->getFieldSetting('target_type')),
       '#title' => t('View mode'),
       '#default_value' => $this->getSetting('view_mode'),
       '#required' => TRUE,
-    );
+    ];
 
     return $elements;
   }
@@ -143,11 +143,11 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $view_modes = $this->entityDisplayRepository->getViewModeOptions($this->getFieldSetting('target_type'));
     $view_mode = $this->getSetting('view_mode');
-    $summary[] = t('Rendered as @mode', array('@mode' => isset($view_modes[$view_mode]) ? $view_modes[$view_mode] : $view_mode));
+    $summary[] = t('Rendered as @mode', ['@mode' => isset($view_modes[$view_mode]) ? $view_modes[$view_mode] : $view_mode]);
 
     return $summary;
   }
@@ -157,7 +157,7 @@ public function settingsSummary() {
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
     $view_mode = $this->getSetting('view_mode');
-    $elements = array();
+    $elements = [];
 
     foreach ($this->getEntitiesToView($items, $langcode) as $delta => $entity) {
       // Due to render caching and delayed calls, the viewElements() method
@@ -199,7 +199,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
       // entity's url. Since we don't know what the markup of the entity will
       // be, we shouldn't rely on it for structured data such as RDFa.
       if (!empty($items[$delta]->_attributes) && !$entity->isNew() && $entity->hasLinkTemplate('canonical')) {
-        $items[$delta]->_attributes += array('resource' => $entity->toUrl()->toString());
+        $items[$delta]->_attributes += ['resource' => $entity->toUrl()->toString()];
       }
     }
 
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php
index e3af1b5eff64da1d3bdfa80bbf36d7ae1780693d..12a349afe5468d20a3b42ac985a401ff9a7c2958 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php
@@ -40,7 +40,7 @@ abstract class EntityReferenceFormatterBase extends FormatterBase {
    * @see ::prepareView()
    */
   protected function getEntitiesToView(EntityReferenceFieldItemListInterface $items, $langcode) {
-    $entities = array();
+    $entities = [];
 
     foreach ($items as $delta => $item) {
       // Ignore items where no entity could be loaded in prepareView().
@@ -120,7 +120,7 @@ public function prepareView(array $entities_items) {
     // "multiple entity load" to load all the entities for the multiple
     // "entity reference item lists" being displayed. We thus cannot use
     // \Drupal\Core\Field\EntityReferenceFieldItemList::referencedEntities().
-    $ids = array();
+    $ids = [];
     foreach ($entities_items as $items) {
       foreach ($items as $item) {
         // To avoid trying to reload non-existent entities in
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceIdFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceIdFormatter.php
index 62e54a777bf09fb3dc6eb12672cb7a30fc18dc93..9fa695de0a9a3364019736871d91635baca51fe8 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceIdFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceIdFormatter.php
@@ -22,19 +22,19 @@ class EntityReferenceIdFormatter extends EntityReferenceFormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($this->getEntitiesToView($items, $langcode) as $delta => $entity) {
       if ($entity->id()) {
-        $elements[$delta] = array(
+        $elements[$delta] = [
           '#plain_text' => $entity->id(),
           // Create a cache tag entry for the referenced entity. In the case
           // that the referenced entity is deleted, the cache for referring
           // entities must be cleared.
-          '#cache' => array(
+          '#cache' => [
             'tags' => $entity->getCacheTags(),
-          ),
-        );
+          ],
+        ];
       }
     }
 
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
index 4cb5d1490045960e76c5971051ffacc9e7d19be5..011e3051eb830240422ebac31d89436c6a6a3bc5 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
@@ -25,20 +25,20 @@ class EntityReferenceLabelFormatter extends EntityReferenceFormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'link' => TRUE,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $elements['link'] = array(
+    $elements['link'] = [
       '#title' => t('Link label to the referenced entity'),
       '#type' => 'checkbox',
       '#default_value' => $this->getSetting('link'),
-    );
+    ];
 
     return $elements;
   }
@@ -47,7 +47,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
     $summary[] = $this->getSetting('link') ? t('Link to the referenced entity') : t('No link');
     return $summary;
   }
@@ -56,7 +56,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
     $output_as_link = $this->getSetting('link');
 
     foreach ($this->getEntitiesToView($items, $langcode) as $delta => $entity) {
@@ -85,7 +85,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
         ];
 
         if (!empty($items[$delta]->_attributes)) {
-          $elements[$delta]['#options'] += array('attributes' => array());
+          $elements[$delta]['#options'] += ['attributes' => []];
           $elements[$delta]['#options']['attributes'] += $items[$delta]->_attributes;
           // Unset field item attributes since they have been included in the
           // formatter output and shouldn't be rendered in the field template.
@@ -93,7 +93,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
         }
       }
       else {
-        $elements[$delta] = array('#plain_text' => $label);
+        $elements[$delta] = ['#plain_text' => $label];
       }
       $elements[$delta]['#cache']['tags'] = $entity->getCacheTags();
     }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/IntegerFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/IntegerFormatter.php
index 17ddf9cbce4647c7dddea085cc8abbec18252188..058de4d34e68e63f04893929233e076df4467c86 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/IntegerFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/IntegerFormatter.php
@@ -23,10 +23,10 @@ class IntegerFormatter extends NumericFormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'thousand_separator' => '',
       'prefix_suffix' => TRUE,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/LanguageFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/LanguageFormatter.php
index 3a0ee89d546e486e27f79c5319cdf82ffed84848..43bbaa5309efb480a4ed003ba30227b2288f4227 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/LanguageFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/LanguageFormatter.php
@@ -89,11 +89,11 @@ public static function defaultSettings() {
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $form = parent::settingsForm($form, $form_state);
-    $form['native_language'] = array(
+    $form['native_language'] = [
       '#title' => $this->t('Display in native language'),
       '#type' => 'checkbox',
       '#default_value' => $this->getSetting('native_language'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/MailToFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/MailToFormatter.php
index 4b9c011cc391a1d88145bd9d86696a6d63504ef7..3cc343041678638e3f0d7b2cb9c2462287699703 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/MailToFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/MailToFormatter.php
@@ -23,14 +23,14 @@ class MailToFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#type' => 'link',
         '#title' => $item->value,
         '#url' => Url::fromUri('mailto:' . $item->value),
-      );
+      ];
     }
 
     return $elements;
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
index 0e35629e8a81f3d6091d7a7dfec92e3362fe7f97..cf75facc8a1649a746d9a007270ffae7f1757724 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
@@ -18,28 +18,28 @@ abstract class NumericFormatterBase extends FormatterBase {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $options = array(
+    $options = [
       ''  => t('- None -'),
       '.' => t('Decimal point'),
       ',' => t('Comma'),
       ' ' => t('Space'),
       chr(8201) => t('Thin space'),
       "'" => t('Apostrophe'),
-    );
-    $elements['thousand_separator'] = array(
+    ];
+    $elements['thousand_separator'] = [
       '#type' => 'select',
       '#title' => t('Thousand marker'),
       '#options' => $options,
       '#default_value' => $this->getSetting('thousand_separator'),
       '#weight' => 0,
-    );
+    ];
 
-    $elements['prefix_suffix'] = array(
+    $elements['prefix_suffix'] = [
       '#type' => 'checkbox',
       '#title' => t('Display prefix and suffix'),
       '#default_value' => $this->getSetting('prefix_suffix'),
       '#weight' => 10,
-    );
+    ];
 
     return $elements;
   }
@@ -48,7 +48,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $summary[] = $this->numberFormat(1234.1234567890);
     if ($this->getSetting('prefix_suffix')) {
@@ -62,7 +62,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
     $settings = $this->getFieldSettings();
 
     foreach ($items as $delta => $item) {
@@ -70,8 +70,8 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
 
       // Account for prefix and suffix.
       if ($this->getSetting('prefix_suffix')) {
-        $prefixes = isset($settings['prefix']) ? array_map(array('Drupal\Core\Field\FieldFilteredMarkup', 'create'), explode('|', $settings['prefix'])) : array('');
-        $suffixes = isset($settings['suffix']) ? array_map(array('Drupal\Core\Field\FieldFilteredMarkup', 'create'), explode('|', $settings['suffix'])) : array('');
+        $prefixes = isset($settings['prefix']) ? array_map(['Drupal\Core\Field\FieldFilteredMarkup', 'create'], explode('|', $settings['prefix'])) : [''];
+        $suffixes = isset($settings['suffix']) ? array_map(['Drupal\Core\Field\FieldFilteredMarkup', 'create'], explode('|', $settings['suffix'])) : [''];
         $prefix = (count($prefixes) > 1) ? $this->formatPlural($item->value, $prefixes[0], $prefixes[1]) : $prefixes[0];
         $suffix = (count($suffixes) > 1) ? $this->formatPlural($item->value, $suffixes[0], $suffixes[1]) : $suffixes[0];
         $output = $prefix . $output . $suffix;
@@ -79,10 +79,10 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
       // Output the raw value in a content attribute if the text of the HTML
       // element differs from the raw value (for example when a prefix is used).
       if (isset($item->_attributes) && $item->value != $output) {
-        $item->_attributes += array('content' => $item->value);
+        $item->_attributes += ['content' => $item->value];
       }
 
-      $elements[$delta] = array('#markup' => $output);
+      $elements[$delta] = ['#markup' => $output];
     }
 
     return $elements;
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericUnformattedFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericUnformattedFormatter.php
index 9881473d1b60a0fe8b775a6ebf7808d6fcdd6058..63246b3ff7b10257087e770af849b6cff6f3d41d 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericUnformattedFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericUnformattedFormatter.php
@@ -24,10 +24,10 @@ class NumericUnformattedFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
-      $elements[$delta] = array('#markup' => $item->value);
+      $elements[$delta] = ['#markup' => $item->value];
     }
 
     return $elements;
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
index a1f618b9084b6b0e0c5bf0cb77fcaf569d2830e6..95ab0b2cf48e0230e903a156787ef390dd0cebcc 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
@@ -113,7 +113,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
     $url = NULL;
     if ($this->getSetting('link_to_entity')) {
       // For the default revision this falls back to 'canonical'
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampAgoFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampAgoFormatter.php
index 2d7ce8100dbfe3b7b9e486668afbb4289a08be76..55a2fb1a049c800758955b2f4707532052d17f3c 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampAgoFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampAgoFormatter.php
@@ -93,11 +93,11 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'future_format' => '@interval hence',
       'past_format' => '@interval ago',
       'granularity' => 2,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -106,28 +106,28 @@ public static function defaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $elements = parent::settingsForm($form, $form_state);
 
-    $form['future_format'] = array(
+    $form['future_format'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Future format'),
       '#default_value' => $this->getSetting('future_format'),
       '#description' => $this->t('Use <em>@interval</em> where you want the formatted interval text to appear.'),
-    );
+    ];
 
-    $form['past_format'] = array(
+    $form['past_format'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Past format'),
       '#default_value' => $this->getSetting('past_format'),
       '#description' => $this->t('Use <em>@interval</em> where you want the formatted interval text to appear.'),
-    );
+    ];
 
-    $elements['granularity'] = array(
+    $elements['granularity'] = [
       '#type' => 'number',
       '#title' => $this->t('Granularity'),
       '#description' => $this->t('How many time interval units should be shown in the formatted output.'),
       '#default_value' => $this->getSetting('granularity') ?: 2,
       '#min' => 1,
       '#max' => 6,
-    );
+    ];
 
     return $elements;
   }
@@ -140,8 +140,8 @@ public function settingsSummary() {
 
     $future_date = strtotime('1 year 1 month 1 week 1 day 1 hour 1 minute');
     $past_date = strtotime('-1 year -1 month -1 week -1 day -1 hour -1 minute');
-    $summary[] = $this->t('Future date: %display', array('%display' => $this->formatTimestamp($future_date)));
-    $summary[] = $this->t('Past date: %display', array('%display' => $this->formatTimestamp($past_date)));
+    $summary[] = $this->t('Future date: %display', ['%display' => $this->formatTimestamp($future_date)]);
+    $summary[] = $this->t('Past date: %display', ['%display' => $this->formatTimestamp($past_date)]);
 
     return $summary;
   }
@@ -150,7 +150,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
       if ($item->value) {
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampFormatter.php
index 8efe8d5a7f06c07d3fbfb554ad926fb81d2c2753..a24f5dd9b7509df849ecbb178dbe7ae42e430498 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampFormatter.php
@@ -90,11 +90,11 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'date_format' => 'medium',
       'custom_date_format' => '',
       'timezone' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -103,38 +103,38 @@ public static function defaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $elements = parent::settingsForm($form, $form_state);
 
-    $date_formats = array();
+    $date_formats = [];
 
     foreach ($this->dateFormatStorage->loadMultiple() as $machine_name => $value) {
-      $date_formats[$machine_name] = $this->t('@name format: @date', array('@name' => $value->label(), '@date' => $this->dateFormatter->format(REQUEST_TIME, $machine_name)));
+      $date_formats[$machine_name] = $this->t('@name format: @date', ['@name' => $value->label(), '@date' => $this->dateFormatter->format(REQUEST_TIME, $machine_name)]);
     }
 
     $date_formats['custom'] = $this->t('Custom');
 
-    $elements['date_format'] = array(
+    $elements['date_format'] = [
       '#type' => 'select',
       '#title' => $this->t('Date format'),
       '#options' => $date_formats,
       '#default_value' => $this->getSetting('date_format') ?: 'medium',
-    );
+    ];
 
-    $elements['custom_date_format'] = array(
+    $elements['custom_date_format'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Custom date format'),
       '#description' => $this->t('See <a href="http://php.net/manual/function.date.php" target="_blank">the documentation for PHP date formats</a>.'),
       '#default_value' => $this->getSetting('custom_date_format') ?: '',
-    );
+    ];
 
-    $elements['custom_date_format']['#states']['visible'][] = array(
-      ':input[name="fields[' . $this->fieldDefinition->getName() . '][settings_edit_form][settings][date_format]"]' => array('value' => 'custom'),
-    );
+    $elements['custom_date_format']['#states']['visible'][] = [
+      ':input[name="fields[' . $this->fieldDefinition->getName() . '][settings_edit_form][settings][date_format]"]' => ['value' => 'custom'],
+    ];
 
-    $elements['timezone'] = array(
+    $elements['timezone'] = [
       '#type' => 'select',
       '#title' => $this->t('Time zone'),
-      '#options' => array('' => $this->t('- Default site/user time zone -')) + system_time_zones(FALSE),
+      '#options' => ['' => $this->t('- Default site/user time zone -')] + system_time_zones(FALSE),
       '#default_value' => $this->getSetting('timezone'),
-    );
+    ];
 
     return $elements;
   }
@@ -146,12 +146,12 @@ public function settingsSummary() {
     $summary = parent::settingsSummary();
 
     $date_format = $this->getSetting('date_format');
-    $summary[] = $this->t('Date format: @date_format', array('@date_format' => $date_format));
+    $summary[] = $this->t('Date format: @date_format', ['@date_format' => $date_format]);
     if ($this->getSetting('date_format') === 'custom' && ($custom_date_format = $this->getSetting('custom_date_format'))) {
-      $summary[] = $this->t('Custom date format: @custom_date_format', array('@custom_date_format' => $custom_date_format));
+      $summary[] = $this->t('Custom date format: @custom_date_format', ['@custom_date_format' => $custom_date_format]);
     }
     if ($timezone = $this->getSetting('timezone')) {
-      $summary[] = $this->t('Time zone: @timezone', array('@timezone' => $timezone));
+      $summary[] = $this->t('Time zone: @timezone', ['@timezone' => $timezone]);
     }
 
     return $summary;
@@ -161,7 +161,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     $date_format = $this->getSetting('date_format');
     $custom_date_format = '';
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/UriLinkFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/UriLinkFormatter.php
index 8f2213e130531091fb2871d6c474813013315265..42163513edf53066808f930cb303c721277cc726 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/UriLinkFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/UriLinkFormatter.php
@@ -23,7 +23,7 @@ class UriLinkFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
       if (!$item->isEmpty()) {
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php
index 01931913a179971f3899df344d6b0034ef75c61f..51a29d860b877f544e6c7c7077826ac1e09edbb5 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php
@@ -28,10 +28,10 @@ class BooleanItem extends FieldItemBase implements OptionsProviderInterface {
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'on_label' => new TranslatableMarkup('On'),
       'off_label' => new TranslatableMarkup('Off'),
-    ) + parent::defaultFieldSettings();
+    ] + parent::defaultFieldSettings();
   }
 
   /**
@@ -49,34 +49,34 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'int',
           'size' => 'tiny',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
-    $element = array();
+    $element = [];
 
-    $element['on_label'] = array(
+    $element['on_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('"On" label'),
       '#default_value' => $this->getSetting('on_label'),
       '#required' => TRUE,
-    );
-    $element['off_label'] = array(
+    ];
+    $element['off_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('"Off" label'),
       '#default_value' => $this->getSetting('off_label'),
       '#required' => TRUE,
-    );
+    ];
 
     return $element;
   }
@@ -85,24 +85,24 @@ public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function getPossibleValues(AccountInterface $account = NULL) {
-    return array(0, 1);
+    return [0, 1];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getPossibleOptions(AccountInterface $account = NULL) {
-    return array(
+    return [
       0 => $this->getSetting('off_label'),
       1 => $this->getSetting('on_label'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getSettableValues(AccountInterface $account = NULL) {
-    return array(0, 1);
+    return [0, 1];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/CreatedItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/CreatedItem.php
index b4bcac530c83eadc66ac2eab12dcb3f0a3653b20..228c8e6bbac15c0228cf72443a6d02c020b0eebd 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/CreatedItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/CreatedItem.php
@@ -22,7 +22,7 @@ class CreatedItem extends TimestampItem {
   public function applyDefaultValue($notify = TRUE) {
     parent::applyDefaultValue($notify);
     // Created fields default to the current timestamp.
-    $this->setValue(array('value' => REQUEST_TIME), $notify);
+    $this->setValue(['value' => REQUEST_TIME], $notify);
     return $this;
   }
 
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php
index a8849fd37bff74fd22288eb3a5ba18bbfe265fdb..00fe4098c764f9f63f506fd281167dfeb84842a0 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php
@@ -25,10 +25,10 @@ class DecimalItem extends NumericItemBase {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'precision' => 10,
       'scale' => 2,
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
@@ -46,25 +46,25 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'numeric',
           'precision' => $field_definition->getSetting('precision'),
           'scale' => $field_definition->getSetting('scale'),
-        )
-      ),
-    );
+        ]
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $element = array();
+    $element = [];
     $settings = $this->getSettings();
 
-    $element['precision'] = array(
+    $element['precision'] = [
       '#type' => 'number',
       '#title' => t('Precision'),
       '#min' => 10,
@@ -72,17 +72,17 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
       '#default_value' => $settings['precision'],
       '#description' => t('The total number of digits to store in the database, including those to the right of the decimal.'),
       '#disabled' => $has_data,
-    );
+    ];
 
-    $element['scale'] = array(
+    $element['scale'] = [
       '#type' => 'number',
-      '#title' => t('Scale', array(), array('context' => 'decimal places')),
+      '#title' => t('Scale', [], ['context' => 'decimal places']),
       '#min' => 0,
       '#max' => 10,
       '#default_value' => $settings['scale'],
       '#description' => t('The number of digits to the right of the decimal.'),
       '#disabled' => $has_data,
-    );
+    ];
 
     return $element;
   }
@@ -94,13 +94,13 @@ public function getConstraints() {
     $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
     $constraints = parent::getConstraints();
 
-    $constraints[] = $constraint_manager->create('ComplexData', array(
-      'value' => array(
-        'Regex' => array(
+    $constraints[] = $constraint_manager->create('ComplexData', [
+      'value' => [
+        'Regex' => [
           'pattern' => '/^[+-]?((\d+(\.\d*)?)|(\.\d+))$/i',
-        )
-      ),
-    ));
+        ]
+      ],
+    ]);
 
     return $constraints;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php
index f42a2b4252bb6f76027981f016af1cef9265e180..ca30ede268112ff41b2d766750c6d0169f697796 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php
@@ -37,14 +37,14 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => Email::EMAIL_MAX_LENGTH,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -54,14 +54,14 @@ public function getConstraints() {
     $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
     $constraints = parent::getConstraints();
 
-    $constraints[] = $constraint_manager->create('ComplexData', array(
-      'value' => array(
-        'Length' => array(
+    $constraints[] = $constraint_manager->create('ComplexData', [
+      'value' => [
+        'Length' => [
           'max' => Email::EMAIL_MAX_LENGTH,
-          'maxMessage' => t('%name: the email address can not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getLabel(), '@max' => Email::EMAIL_MAX_LENGTH)),
-        )
-      ),
-    ));
+          'maxMessage' => t('%name: the email address can not be longer than @max characters.', ['%name' => $this->getFieldDefinition()->getLabel(), '@max' => Email::EMAIL_MAX_LENGTH]),
+        ]
+      ],
+    ]);
 
     return $constraints;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php
index 3babf428752ed8020ff52dd0343b77f618368922..72c0532f37dfa2277304ee30aee9b969032395d4 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php
@@ -44,19 +44,19 @@ class EntityReferenceItem extends FieldItemBase implements OptionsProviderInterf
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'target_type' => \Drupal::moduleHandler()->moduleExists('node') ? 'node' : 'user',
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'handler' => 'default',
-      'handler_settings' => array(),
-    ) + parent::defaultFieldSettings();
+      'handler_settings' => [],
+    ] + parent::defaultFieldSettings();
   }
 
   /**
@@ -116,32 +116,32 @@ public static function schema(FieldStorageDefinitionInterface $field_definition)
     $target_type_info = \Drupal::entityManager()->getDefinition($target_type);
     $properties = static::propertyDefinitions($field_definition)['target_id'];
     if ($target_type_info->entityClassImplements(FieldableEntityInterface::class) && $properties->getDataType() === 'integer') {
-      $columns = array(
-        'target_id' => array(
+      $columns = [
+        'target_id' => [
           'description' => 'The ID of the target entity.',
           'type' => 'int',
           'unsigned' => TRUE,
-        ),
-      );
+        ],
+      ];
     }
     else {
-      $columns = array(
-        'target_id' => array(
+      $columns = [
+        'target_id' => [
           'description' => 'The ID of the target entity.',
           'type' => 'varchar_ascii',
           // If the target entities act as bundles for another entity type,
           // their IDs should not exceed the maximum length for bundles.
           'length' => $target_type_info->getBundleOf() ? EntityTypeInterface::BUNDLE_MAX_LENGTH : 255,
-        ),
-      );
+        ],
+      ];
     }
 
-    $schema = array(
+    $schema = [
       'columns' => $columns,
-      'indexes' => array(
-        'target_id' => array('target_id'),
-      ),
-    );
+      'indexes' => [
+        'target_id' => ['target_id'],
+      ],
+    ];
 
     return $schema;
   }
@@ -272,12 +272,12 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
 
     // Instead of calling $manager->getSelectionHandler($field_definition)
     // replicate the behavior to be able to override the sorting settings.
-    $options = array(
+    $options = [
       'target_type' => $field_definition->getFieldStorageDefinition()->getSetting('target_type'),
       'handler' => $field_definition->getSetting('handler'),
-      'handler_settings' => $field_definition->getSetting('handler_settings') ?: array(),
+      'handler_settings' => $field_definition->getSetting('handler_settings') ?: [],
       'entity' => NULL,
-    );
+    ];
 
     $entity_type = \Drupal::entityManager()->getDefinition($options['target_type']);
     $options['handler_settings']['sort'] = [
@@ -299,7 +299,7 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $element['target_type'] = array(
+    $element['target_type'] = [
       '#type' => 'select',
       '#title' => t('Type of item to reference'),
       '#options' => \Drupal::entityManager()->getEntityTypeLabels(TRUE),
@@ -307,7 +307,7 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
       '#required' => TRUE,
       '#disabled' => $has_data,
       '#size' => 1,
-    );
+    ];
 
     return $element;
   }
@@ -320,7 +320,7 @@ public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
 
     // Get all selection plugins for this entity type.
     $selection_plugins = \Drupal::service('plugin.manager.entity_reference_selection')->getSelectionGroups($this->getSetting('target_type'));
-    $handlers_options = array();
+    $handlers_options = [];
     foreach (array_keys($selection_plugins) as $selection_group_id) {
       // We only display base plugins (e.g. 'default', 'views', ...) and not
       // entity type specific plugins (e.g. 'default:node', 'default:user',
@@ -334,46 +334,46 @@ public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
       }
     }
 
-    $form = array(
+    $form = [
       '#type' => 'container',
-      '#process' => array(array(get_class($this), 'fieldSettingsAjaxProcess')),
-      '#element_validate' => array(array(get_class($this), 'fieldSettingsFormValidate')),
+      '#process' => [[get_class($this), 'fieldSettingsAjaxProcess']],
+      '#element_validate' => [[get_class($this), 'fieldSettingsFormValidate']],
 
-    );
-    $form['handler'] = array(
+    ];
+    $form['handler'] = [
       '#type' => 'details',
       '#title' => t('Reference type'),
       '#open' => TRUE,
       '#tree' => TRUE,
-      '#process' => array(array(get_class($this), 'formProcessMergeParent')),
-    );
+      '#process' => [[get_class($this), 'formProcessMergeParent']],
+    ];
 
-    $form['handler']['handler'] = array(
+    $form['handler']['handler'] = [
       '#type' => 'select',
       '#title' => t('Reference method'),
       '#options' => $handlers_options,
       '#default_value' => $field->getSetting('handler'),
       '#required' => TRUE,
       '#ajax' => TRUE,
-      '#limit_validation_errors' => array(),
-    );
-    $form['handler']['handler_submit'] = array(
+      '#limit_validation_errors' => [],
+    ];
+    $form['handler']['handler_submit'] = [
       '#type' => 'submit',
       '#value' => t('Change handler'),
-      '#limit_validation_errors' => array(),
-      '#attributes' => array(
-        'class' => array('js-hide'),
-      ),
-      '#submit' => array(array(get_class($this), 'settingsAjaxSubmit')),
-    );
-
-    $form['handler']['handler_settings'] = array(
+      '#limit_validation_errors' => [],
+      '#attributes' => [
+        'class' => ['js-hide'],
+      ],
+      '#submit' => [[get_class($this), 'settingsAjaxSubmit']],
+    ];
+
+    $form['handler']['handler_settings'] = [
       '#type' => 'container',
-      '#attributes' => array('class' => array('entity_reference-settings')),
-    );
+      '#attributes' => ['class' => ['entity_reference-settings']],
+    ];
 
     $handler = \Drupal::service('plugin.manager.entity_reference_selection')->getSelectionHandler($field);
-    $form['handler']['handler_settings'] += $handler->buildConfigurationForm(array(), $form_state);
+    $form['handler']['handler_settings'] += $handler->buildConfigurationForm([], $form_state);
 
     return $form;
   }
@@ -556,14 +556,14 @@ public function getSettableValues(AccountInterface $account = NULL) {
   public function getSettableOptions(AccountInterface $account = NULL) {
     $field_definition = $this->getFieldDefinition();
     if (!$options = \Drupal::service('plugin.manager.entity_reference_selection')->getSelectionHandler($field_definition, $this->getEntity())->getReferenceableEntities()) {
-      return array();
+      return [];
     }
 
     // Rebuild the array by changing the bundle key into the bundle label.
     $target_type = $field_definition->getSetting('target_type');
     $bundles = \Drupal::entityManager()->getBundleInfo($target_type);
 
-    $return = array();
+    $return = [];
     foreach ($options as $bundle => $entity_ids) {
       // The label does not need sanitizing since it is used as an optgroup
       // which is only supported by select elements and auto-escaped.
@@ -593,11 +593,11 @@ public static function fieldSettingsAjaxProcess($form, FormStateInterface $form_
    */
   public static function fieldSettingsAjaxProcessElement(&$element, $main_form) {
     if (!empty($element['#ajax'])) {
-      $element['#ajax'] = array(
-        'callback' => array(get_called_class(), 'settingsAjax'),
+      $element['#ajax'] = [
+        'callback' => [get_called_class(), 'settingsAjax'],
         'wrapper' => $main_form['#id'],
         'element' => $main_form['#array_parents'],
-      );
+      ];
     }
 
     foreach (Element::children($element) as $key) {
@@ -641,7 +641,7 @@ public static function settingsAjaxSubmit($form, FormStateInterface $form_state)
    * {@inheritdoc}
    */
   public static function getPreconfiguredOptions() {
-    $options = array();
+    $options = [];
 
     // Add all the commonly referenced entity types as distinct pre-configured
     // options.
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php
index 601bc8a19443c6874791e41c96604e4f2bb917e1..7b2234c18e1b62e86523be672a34e31f1cab9dc4 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php
@@ -36,13 +36,13 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'float',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php
index 0e9541713126ba94289ade0e681542db2fbd8bce..8469126729a61f1e75c4cc59b9f855711a06fabd 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php
@@ -24,24 +24,24 @@ class IntegerItem extends NumericItemBase {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'unsigned' => FALSE,
       // Valid size property values include: 'tiny', 'small', 'medium', 'normal'
       // and 'big'.
       'size' => 'normal',
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'min' => '',
       'max' => '',
       'prefix' => '',
       'suffix' => '',
-    ) + parent::defaultFieldSettings();
+    ] + parent::defaultFieldSettings();
   }
 
   /**
@@ -65,17 +65,17 @@ public function getConstraints() {
     // integer to be positive.
     if ($this->getSetting('unsigned')) {
       $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
-      $constraints[] = $constraint_manager->create('ComplexData', array(
-        'value' => array(
-          'Range' => array(
+      $constraints[] = $constraint_manager->create('ComplexData', [
+        'value' => [
+          'Range' => [
             'min' => 0,
-            'minMessage' => t('%name: The integer must be larger or equal to %min.', array(
+            'minMessage' => t('%name: The integer must be larger or equal to %min.', [
               '%name' => $this->getFieldDefinition()->getLabel(),
               '%min' => 0,
-            )),
-          ),
-        ),
-      ));
+            ]),
+          ],
+        ],
+      ]);
     }
 
     return $constraints;
@@ -85,18 +85,18 @@ public function getConstraints() {
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'int',
           // Expose the 'unsigned' setting in the field item schema.
           'unsigned' => $field_definition->getSetting('unsigned'),
           // Expose the 'size' setting in the field item schema. For instance,
           // supply 'big' as a value to produce a 'bigint' type.
           'size' => $field_definition->getSetting('size'),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
index 0b9bba97c9619ca71daca77d316e552e6d75696e..18935c1b8f5b3031f149c4986493701081867be9 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
@@ -65,14 +65,14 @@ public static function getAllowedLanguageCodes() {
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'varchar_ascii',
           'length' => 12,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -99,7 +99,7 @@ public function setValue($values, $notify = TRUE) {
   public function applyDefaultValue($notify = TRUE) {
     // Default to the site's default language. When language module is enabled,
     // this behavior is configurable, see language_field_info_alter().
-    $this->setValue(array('value' => \Drupal::languageManager()->getDefaultLanguage()->getId()), $notify);
+    $this->setValue(['value' => \Drupal::languageManager()->getDefaultLanguage()->getId()], $notify);
     return $this;
   }
 
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/MapItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/MapItem.php
index cff52d8e91ad4401b06f76bada300dbf13e74cc6..04045c7d242b224f981f105c0a1c90534887a08e 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/MapItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/MapItem.php
@@ -22,22 +22,22 @@ class MapItem extends FieldItemBase {
    */
   public static function propertyDefinitions(FieldStorageDefinitionInterface $field_definition) {
     // The properties are dynamic and can not be defined statically.
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'blob',
           'size' => 'big',
           'serialize' => TRUE,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -53,7 +53,7 @@ public function toArray() {
    * {@inheritdoc}
    */
   public function setValue($values, $notify = TRUE) {
-    $this->values = array();
+    $this->values = [];
     if (!isset($values)) {
       return;
     }
@@ -80,7 +80,7 @@ public function setValue($values, $notify = TRUE) {
    */
   public function __get($name) {
     if (!isset($this->values[$name])) {
-      $this->values[$name] = array();
+      $this->values[$name] = [];
     }
 
     return $this->values[$name];
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/NumericItemBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/NumericItemBase.php
index 678ab1ff2d106629706683706eb19313d1215520..23f5161f28b795a693a1929d6872459cc3d1450b 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/NumericItemBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/NumericItemBase.php
@@ -14,47 +14,47 @@ abstract class NumericItemBase extends FieldItemBase {
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'min' => '',
       'max' => '',
       'prefix' => '',
       'suffix' => '',
-    ) + parent::defaultFieldSettings();
+    ] + parent::defaultFieldSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
-    $element = array();
+    $element = [];
     $settings = $this->getSettings();
 
-    $element['min'] = array(
+    $element['min'] = [
       '#type' => 'number',
       '#title' => t('Minimum'),
       '#default_value' => $settings['min'],
       '#description' => t('The minimum value that should be allowed in this field. Leave blank for no minimum.'),
-    );
-    $element['max'] = array(
+    ];
+    $element['max'] = [
       '#type' => 'number',
       '#title' => t('Maximum'),
       '#default_value' => $settings['max'],
       '#description' => t('The maximum value that should be allowed in this field. Leave blank for no maximum.'),
-    );
-    $element['prefix'] = array(
+    ];
+    $element['prefix'] = [
       '#type' => 'textfield',
       '#title' => t('Prefix'),
       '#default_value' => $settings['prefix'],
       '#size' => 60,
       '#description' => t("Define a string that should be prefixed to the value, like '$ ' or '&euro; '. Leave blank for none. Separate singular and plural values with a pipe ('pound|pounds')."),
-    );
-    $element['suffix'] = array(
+    ];
+    $element['suffix'] = [
       '#type' => 'textfield',
       '#title' => t('Suffix'),
       '#default_value' => $settings['suffix'],
       '#size' => 60,
       '#description' => t("Define a string that should be suffixed to the value, like ' m', ' kb/s'. Leave blank for none. Separate singular and plural values with a pipe ('pound|pounds')."),
-    );
+    ];
 
     return $element;
   }
@@ -81,26 +81,26 @@ public function getConstraints() {
 
     if (!empty($settings['min'])) {
       $min = $settings['min'];
-      $constraints[] = $constraint_manager->create('ComplexData', array(
-        'value' => array(
-          'Range' => array(
+      $constraints[] = $constraint_manager->create('ComplexData', [
+        'value' => [
+          'Range' => [
             'min' => $min,
-            'minMessage' => t('%name: the value may be no less than %min.', array('%name' => $label, '%min' => $min)),
-          )
-        ),
-      ));
+            'minMessage' => t('%name: the value may be no less than %min.', ['%name' => $label, '%min' => $min]),
+          ]
+        ],
+      ]);
     }
 
     if (!empty($settings['max'])) {
       $max = $settings['max'];
-      $constraints[] = $constraint_manager->create('ComplexData', array(
-        'value' => array(
-          'Range' => array(
+      $constraints[] = $constraint_manager->create('ComplexData', [
+        'value' => [
+          'Range' => [
             'max' => $max,
-            'maxMessage' => t('%name: the value may be no greater than %max.', array('%name' => $label, '%max' => $max)),
-          )
-        ),
-      ));
+            'maxMessage' => t('%name: the value may be no greater than %max.', ['%name' => $label, '%max' => $max]),
+          ]
+        ],
+      ]);
     }
 
     return $constraints;
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
index 67414d98fb9c5dfa981987f81b1f46907535ff3e..b51764c2948db31ba4c064e1a628dfb5a6df3558 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
@@ -25,25 +25,25 @@ class StringItem extends StringItemBase {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'max_length' => 255,
       'is_ascii' => FALSE,
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => $field_definition->getSetting('is_ascii') === TRUE ? 'varchar_ascii' : 'varchar',
           'length' => (int) $field_definition->getSetting('max_length'),
           'binary' => $field_definition->getSetting('case_sensitive'),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -54,14 +54,14 @@ public function getConstraints() {
 
     if ($max_length = $this->getSetting('max_length')) {
       $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
-      $constraints[] = $constraint_manager->create('ComplexData', array(
-        'value' => array(
-          'Length' => array(
+      $constraints[] = $constraint_manager->create('ComplexData', [
+        'value' => [
+          'Length' => [
             'max' => $max_length,
-            'maxMessage' => t('%name: may not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getLabel(), '@max' => $max_length)),
-          ),
-        ),
-      ));
+            'maxMessage' => t('%name: may not be longer than @max characters.', ['%name' => $this->getFieldDefinition()->getLabel(), '@max' => $max_length]),
+          ],
+        ],
+      ]);
     }
 
     return $constraints;
@@ -80,9 +80,9 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $element = array();
+    $element = [];
 
-    $element['max_length'] = array(
+    $element['max_length'] = [
       '#type' => 'number',
       '#title' => t('Maximum length'),
       '#default_value' => $this->getSetting('max_length'),
@@ -90,7 +90,7 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
       '#description' => t('The maximum length of the field in characters.'),
       '#min' => 1,
       '#disabled' => $has_data,
-    );
+    ];
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
index 6a784d6ca4a7895f0219fa8f57e22d025fa7581d..f59c10c985f928d73731a45196ee3d506d9f933e 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
@@ -16,9 +16,9 @@ abstract class StringItemBase extends FieldItemBase {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'case_sensitive' => FALSE,
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php
index ae998d321c889f43b07617bcbdafa3f9dd174615..93c6b27bcb677e026004dee7d0954021de608bad 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php
@@ -24,14 +24,14 @@ class StringLongItem extends StringItemBase {
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => $field_definition->getSetting('case_sensitive') ? 'blob' : 'text',
           'size' => 'big',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/TimestampItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/TimestampItem.php
index 98094caffa3e0787cb8887ed5afdb0ae7537a231..f48e4f01cac608a4c81416694c4fa850f086ecaf 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/TimestampItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/TimestampItem.php
@@ -44,13 +44,13 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'int',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UriItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UriItem.php
index 034fc164d73c3a730f1d43830d3484db6892cb8f..8d1d6e64949b88c833bc95a61c03bda04115d8d8 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UriItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UriItem.php
@@ -52,15 +52,15 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => (int) $field_definition->getSetting('max_length'),
           'binary' => $field_definition->getSetting('case_sensitive'),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UuidItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UuidItem.php
index 8bd33ce447896de6c6be7a0f686c0f88a09fdd7e..a5f94010880b9813596d4458149823fc45c5c899 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UuidItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UuidItem.php
@@ -24,10 +24,10 @@ class UuidItem extends StringItem {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'max_length' => 128,
       'is_ascii' => TRUE,
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
@@ -36,7 +36,7 @@ public static function defaultStorageSettings() {
   public function applyDefaultValue($notify = TRUE) {
     // Default to one field item with a generated UUID.
     $uuid = \Drupal::service('uuid');
-    $this->setValue(array('value' => $uuid->generate()), $notify);
+    $this->setValue(['value' => $uuid->generate()], $notify);
     return $this;
   }
 
@@ -45,7 +45,7 @@ public function applyDefaultValue($notify = TRUE) {
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
     $schema = parent::schema($field_definition);
-    $schema['unique keys']['value'] = array('value');
+    $schema['unique keys']['value'] = ['value'];
     return $schema;
   }
 
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/BooleanCheckboxWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/BooleanCheckboxWidget.php
index 3106fbe6b332c2d34f7789beb248a8524594bc8c..1d4a202f00fe0d815492adeff84ea20db26644a8 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/BooleanCheckboxWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/BooleanCheckboxWidget.php
@@ -24,21 +24,21 @@ class BooleanCheckboxWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'display_label' => TRUE,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['display_label'] = array(
+    $element['display_label'] = [
       '#type' => 'checkbox',
       '#title' => t('Use field label instead of the "On label" as label'),
       '#default_value' => $this->getSetting('display_label'),
       '#weight' => -1,
-    );
+    ];
     return $element;
   }
 
@@ -46,10 +46,10 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $display_label = $this->getSetting('display_label');
-    $summary[] = t('Use field label: @display_label', array('@display_label' => ($display_label ? t('Yes') : 'No')));
+    $summary[] = t('Use field label: @display_label', ['@display_label' => ($display_label ? t('Yes') : 'No')]);
 
     return $summary;
   }
@@ -58,10 +58,10 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element['value'] = $element + array(
+    $element['value'] = $element + [
       '#type' => 'checkbox',
       '#default_value' => !empty($items[0]->value),
-    );
+    ];
 
     // Override the title from the incoming $element.
     if ($this->getSetting('display_label')) {
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EmailDefaultWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EmailDefaultWidget.php
index 9931d4e6fb107ab9b83a68c78f8e4184a1cf71b7..07f66cf269a8b80f524a6061bd8181e9529256c3 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EmailDefaultWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EmailDefaultWidget.php
@@ -24,29 +24,29 @@ class EmailDefaultWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'size' => 60,
       'placeholder' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['size'] = array(
+    $element['size'] = [
       '#type' => 'number',
       '#title' => $this->t('Textfield size'),
       '#default_value' => $this->getSetting('size'),
       '#required' => TRUE,
       '#min' => 1,
-    );
-    $element['placeholder'] = array(
+    ];
+    $element['placeholder'] = [
       '#type' => 'textfield',
       '#title' => t('Placeholder'),
       '#default_value' => $this->getSetting('placeholder'),
       '#description' => t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
+    ];
     return $element;
   }
 
@@ -54,16 +54,16 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $placeholder = $this->getSetting('placeholder');
     if (!empty($placeholder)) {
-      $summary[] = t('Placeholder: @placeholder', array('@placeholder' => $placeholder));
+      $summary[] = t('Placeholder: @placeholder', ['@placeholder' => $placeholder]);
     }
     else {
       $summary[] = t('No placeholder');
     }
-    $summary[] = t('Textfield size: @size', array('@size' => $this->getSetting('size')));
+    $summary[] = t('Textfield size: @size', ['@size' => $this->getSetting('size')]);
 
     return $summary;
   }
@@ -72,13 +72,13 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element['value'] = $element + array(
+    $element['value'] = $element + [
       '#type' => 'email',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : NULL,
       '#placeholder' => $this->getSetting('placeholder'),
       '#size' => $this->getSetting('size'),
       '#maxlength' => Email::EMAIL_MAX_LENGTH,
-    );
+    ];
     return $element;
   }
 
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php
index 3824810a92336c70e361c06a10fc73e04454bd56..11f048e6f894d897f449aa8b0b1d0361010f7a6c 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php
@@ -26,37 +26,37 @@ class EntityReferenceAutocompleteWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'match_operator' => 'CONTAINS',
       'size' => '60',
       'placeholder' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['match_operator'] = array(
+    $element['match_operator'] = [
       '#type' => 'radios',
       '#title' => t('Autocomplete matching'),
       '#default_value' => $this->getSetting('match_operator'),
       '#options' => $this->getMatchOperatorOptions(),
       '#description' => t('Select the method used to collect autocomplete suggestions. Note that <em>Contains</em> can cause performance issues on sites with thousands of entities.'),
-    );
-    $element['size'] = array(
+    ];
+    $element['size'] = [
       '#type' => 'number',
       '#title' => t('Size of textfield'),
       '#default_value' => $this->getSetting('size'),
       '#min' => 1,
       '#required' => TRUE,
-    );
-    $element['placeholder'] = array(
+    ];
+    $element['placeholder'] = [
       '#type' => 'textfield',
       '#title' => t('Placeholder'),
       '#default_value' => $this->getSetting('placeholder'),
       '#description' => t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
+    ];
     return $element;
   }
 
@@ -64,14 +64,14 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $operators = $this->getMatchOperatorOptions();
-    $summary[] = t('Autocomplete matching: @match_operator', array('@match_operator' => $operators[$this->getSetting('match_operator')]));
-    $summary[] = t('Textfield size: @size', array('@size' => $this->getSetting('size')));
+    $summary[] = t('Autocomplete matching: @match_operator', ['@match_operator' => $operators[$this->getSetting('match_operator')]]);
+    $summary[] = t('Textfield size: @size', ['@size' => $this->getSetting('size')]);
     $placeholder = $this->getSetting('placeholder');
     if (!empty($placeholder)) {
-      $summary[] = t('Placeholder: @placeholder', array('@placeholder' => $placeholder));
+      $summary[] = t('Placeholder: @placeholder', ['@placeholder' => $placeholder]);
     }
     else {
       $summary[] = t('No placeholder');
@@ -90,7 +90,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     // Append the match operation to the selection settings.
     $selection_settings = $this->getFieldSetting('handler_settings') + ['match_operator' => $this->getSetting('match_operator')];
 
-    $element += array(
+    $element += [
       '#type' => 'entity_autocomplete',
       '#target_type' => $this->getFieldSetting('target_type'),
       '#selection_handler' => $this->getFieldSetting('handler'),
@@ -102,16 +102,16 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       '#default_value' => isset($referenced_entities[$delta]) ? $referenced_entities[$delta] : NULL,
       '#size' => $this->getSetting('size'),
       '#placeholder' => $this->getSetting('placeholder'),
-    );
+    ];
 
     if ($this->getSelectionHandlerSetting('auto_create') && ($bundle = $this->getAutocreateBundle())) {
-      $element['#autocreate'] = array(
+      $element['#autocreate'] = [
         'bundle' => $bundle,
         'uid' => ($entity instanceof EntityOwnerInterface) ? $entity->getOwnerId() : \Drupal::currentUser()->id()
-      );
+      ];
     }
 
-    return array('target_id' => $element);
+    return ['target_id' => $element];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php
index 697c603ab40f6e69c2fb9b70f8a5a4386a039b3c..0872ba3b2078227462f75afd2e2814f02ff5f11f 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php
@@ -24,11 +24,11 @@ class LanguageSelectWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element['value'] = $element + array(
+    $element['value'] = $element + [
       '#type' => 'language_select',
       '#default_value' => $items[$delta]->value,
       '#languages' => $this->getSetting('include_locked') ? LanguageInterface::STATE_ALL : LanguageInterface::STATE_CONFIGURABLE,
-    );
+    ];
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/NumberWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/NumberWidget.php
index 82005696ddc4363145246a5ab8d4e7be089776e1..b4fac537b4765407bd01358dde5955eb2adb3d36 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/NumberWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/NumberWidget.php
@@ -27,21 +27,21 @@ class NumberWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'placeholder' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['placeholder'] = array(
+    $element['placeholder'] = [
       '#type' => 'textfield',
       '#title' => t('Placeholder'),
       '#default_value' => $this->getSetting('placeholder'),
       '#description' => t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
+    ];
     return $element;
   }
 
@@ -49,11 +49,11 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $placeholder = $this->getSetting('placeholder');
     if (!empty($placeholder)) {
-      $summary[] = t('Placeholder: @placeholder', array('@placeholder' => $placeholder));
+      $summary[] = t('Placeholder: @placeholder', ['@placeholder' => $placeholder]);
     }
     else {
       $summary[] = t('No placeholder');
@@ -69,11 +69,11 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     $value = isset($items[$delta]->value) ? $items[$delta]->value : NULL;
     $field_settings = $this->getFieldSettings();
 
-    $element += array(
+    $element += [
       '#type' => 'number',
       '#default_value' => $value,
       '#placeholder' => $this->getSetting('placeholder'),
-    );
+    ];
 
     // Set the step for floating point and decimal numbers.
     switch ($this->fieldDefinition->getType()) {
@@ -104,7 +104,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       $element['#field_suffix'] = FieldFilteredMarkup::create(array_pop($suffixes));
     }
 
-    return array('value' => $element);
+    return ['value' => $element];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsButtonsWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsButtonsWidget.php
index 1224c63c04cc6894e5ccf5e261fbb72960ad2ea2..7787106d85f31eb22f5394889a06134bd3e2053b 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsButtonsWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsButtonsWidget.php
@@ -35,25 +35,25 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     // If required and there is one single option, preselect it.
     if ($this->required && count($options) == 1) {
       reset($options);
-      $selected = array(key($options));
+      $selected = [key($options)];
     }
 
     if ($this->multiple) {
-      $element += array(
+      $element += [
         '#type' => 'checkboxes',
         '#default_value' => $selected,
         '#options' => $options,
-      );
+      ];
     }
     else {
-      $element += array(
+      $element += [
         '#type' => 'radios',
         // Radio buttons need a scalar value. Take the first default value, or
         // default to NULL so that the form element is properly recognized as
         // not having a default value.
         '#default_value' => $selected ? reset($selected) : NULL,
         '#options' => $options,
-      );
+      ];
     }
 
     return $element;
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsSelectWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsSelectWidget.php
index 3a719896f45e448b8bc061e402104fcca47eba1d..b623c8755eec7e39a16ea0eaa8a4cbf2b12a53ea 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsSelectWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsSelectWidget.php
@@ -29,13 +29,13 @@ class OptionsSelectWidget extends OptionsWidgetBase {
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
     $element = parent::formElement($items, $delta, $element, $form, $form_state);
 
-    $element += array(
+    $element += [
       '#type' => 'select',
       '#options' => $this->getOptions($items->getEntity()),
       '#default_value' => $this->getSelectedOptions($items),
       // Do not display a 'multiple' select box if there is only one option.
       '#multiple' => $this->multiple && count($this->options) > 1,
-    );
+    ];
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsWidgetBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsWidgetBase.php
index ca00bcc6485c92404a13b9369ada1aff607ed1eb..bb773cdeabfc2266f8e17199babd0d34cd9a254d 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsWidgetBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsWidgetBase.php
@@ -50,7 +50,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     $this->has_value = isset($items[0]->{$this->column});
 
     // Add our custom validator.
-    $element['#element_validate'][] = array(get_class($this), 'validateElement');
+    $element['#element_validate'][] = [get_class($this), 'validateElement'];
     $element['#key_column'] = $this->column;
 
     // The rest of the $element is built by child method implementations.
@@ -68,7 +68,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
    */
   public static function validateElement(array $element, FormStateInterface $form_state) {
     if ($element['#required'] && $element['#value'] == '_none') {
-      $form_state->setError($element, t('@name field is required.', array('@name' => $element['#title'])));
+      $form_state->setError($element, t('@name field is required.', ['@name' => $element['#title']]));
     }
 
     // Massage submitted form values.
@@ -80,7 +80,7 @@ public static function validateElement(array $element, FormStateInterface $form_
       $values = array_values($element['#value']);
     }
     else {
-      $values = array($element['#value']);
+      $values = [$element['#value']];
     }
 
     // Filter out the 'none' option. Use a strict comparison, because
@@ -91,9 +91,9 @@ public static function validateElement(array $element, FormStateInterface $form_
     }
 
     // Transpose selections from field => delta to delta => field.
-    $items = array();
+    $items = [];
     foreach ($values as $value) {
-      $items[] = array($element['#key_column'] => $value);
+      $items[] = [$element['#key_column'] => $value];
     }
     $form_state->setValueForElement($element, $items);
   }
@@ -121,13 +121,13 @@ protected function getOptions(FieldableEntityInterface $entity) {
       }
 
       $module_handler = \Drupal::moduleHandler();
-      $context = array(
+      $context = [
         'fieldDefinition' => $this->fieldDefinition,
         'entity' => $entity,
-      );
+      ];
       $module_handler->alter('options_list', $options, $context);
 
-      array_walk_recursive($options, array($this, 'sanitizeLabel'));
+      array_walk_recursive($options, [$this, 'sanitizeLabel']);
 
       // Options might be nested ("optgroups"). If the widget does not support
       // nested options, flatten the list.
@@ -153,7 +153,7 @@ protected function getSelectedOptions(FieldItemListInterface $items) {
     // We need to check against a flat list of options.
     $flat_options = OptGroup::flattenOptions($this->getOptions($items->getEntity()));
 
-    $selected_options = array();
+    $selected_options = [];
     foreach ($items as $item) {
       $value = $item->{$this->column};
       // Keep the value if it actually is in the list of options (needs to be
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextareaWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextareaWidget.php
index e6b0ff08d32d43393427220995f5fa004deade02..5f21b5edd49db7775b54a1ec61c25ad688d98583 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextareaWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextareaWidget.php
@@ -23,29 +23,29 @@ class StringTextareaWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'rows' => '5',
       'placeholder' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['rows'] = array(
+    $element['rows'] = [
       '#type' => 'number',
       '#title' => t('Rows'),
       '#default_value' => $this->getSetting('rows'),
       '#required' => TRUE,
       '#min' => 1,
-    );
-    $element['placeholder'] = array(
+    ];
+    $element['placeholder'] = [
       '#type' => 'textfield',
       '#title' => t('Placeholder'),
       '#default_value' => $this->getSetting('placeholder'),
       '#description' => t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
+    ];
     return $element;
   }
 
@@ -53,12 +53,12 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
-    $summary[] = t('Number of rows: @rows', array('@rows' => $this->getSetting('rows')));
+    $summary[] = t('Number of rows: @rows', ['@rows' => $this->getSetting('rows')]);
     $placeholder = $this->getSetting('placeholder');
     if (!empty($placeholder)) {
-      $summary[] = t('Placeholder: @placeholder', array('@placeholder' => $placeholder));
+      $summary[] = t('Placeholder: @placeholder', ['@placeholder' => $placeholder]);
     }
 
     return $summary;
@@ -68,13 +68,13 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element['value'] = $element + array(
+    $element['value'] = $element + [
       '#type' => 'textarea',
       '#default_value' => $items[$delta]->value,
       '#rows' => $this->getSetting('rows'),
       '#placeholder' => $this->getSetting('placeholder'),
-      '#attributes' => array('class' => array('js-text-full', 'text-full')),
-    );
+      '#attributes' => ['class' => ['js-text-full', 'text-full']],
+    ];
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextfieldWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextfieldWidget.php
index d89f0b2f5f918c03517b9a35be0a8441aee6ff0d..3be1681761431b0e3e5500a47ee85de96d73d8e2 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextfieldWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextfieldWidget.php
@@ -23,29 +23,29 @@ class StringTextfieldWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'size' => 60,
       'placeholder' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['size'] = array(
+    $element['size'] = [
       '#type' => 'number',
       '#title' => t('Size of textfield'),
       '#default_value' => $this->getSetting('size'),
       '#required' => TRUE,
       '#min' => 1,
-    );
-    $element['placeholder'] = array(
+    ];
+    $element['placeholder'] = [
       '#type' => 'textfield',
       '#title' => t('Placeholder'),
       '#default_value' => $this->getSetting('placeholder'),
       '#description' => t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
+    ];
     return $element;
   }
 
@@ -53,12 +53,12 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
-    $summary[] = t('Textfield size: @size', array('@size' => $this->getSetting('size')));
+    $summary[] = t('Textfield size: @size', ['@size' => $this->getSetting('size')]);
     $placeholder = $this->getSetting('placeholder');
     if (!empty($placeholder)) {
-      $summary[] = t('Placeholder: @placeholder', array('@placeholder' => $placeholder));
+      $summary[] = t('Placeholder: @placeholder', ['@placeholder' => $placeholder]);
     }
 
     return $summary;
@@ -68,14 +68,14 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element['value'] = $element + array(
+    $element['value'] = $element + [
       '#type' => 'textfield',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : NULL,
       '#size' => $this->getSetting('size'),
       '#placeholder' => $this->getSetting('placeholder'),
       '#maxlength' => $this->getFieldSetting('max_length'),
-      '#attributes' => array('class' => array('js-text-full', 'text-full')),
-    );
+      '#attributes' => ['class' => ['js-text-full', 'text-full']],
+    ];
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/UriWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/UriWidget.php
index 714b4e04d3b16c122fcc6facce3ee5f9c9c2a6d8..f89b4442e45a4f74c8ccc74f920188660a0fe3ba 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/UriWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/UriWidget.php
@@ -23,29 +23,29 @@ class UriWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'size' => 60,
       'placeholder' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['size'] = array(
+    $element['size'] = [
       '#type' => 'number',
       '#title' => $this->t('Size of URI field'),
       '#default_value' => $this->getSetting('size'),
       '#required' => TRUE,
       '#min' => 1,
-    );
-    $element['placeholder'] = array(
+    ];
+    $element['placeholder'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Placeholder'),
       '#default_value' => $this->getSetting('placeholder'),
       '#description' => $this->t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
+    ];
     return $element;
   }
 
@@ -53,12 +53,12 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
-    $summary[] = $this->t('URI field size: @size', array('@size' => $this->getSetting('size')));
+    $summary[] = $this->t('URI field size: @size', ['@size' => $this->getSetting('size')]);
     $placeholder = $this->getSetting('placeholder');
     if (!empty($placeholder)) {
-      $summary[] = $this->t('Placeholder: @placeholder', array('@placeholder' => $placeholder));
+      $summary[] = $this->t('Placeholder: @placeholder', ['@placeholder' => $placeholder]);
     }
 
     return $summary;
@@ -68,13 +68,13 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element['value'] = $element + array(
+    $element['value'] = $element + [
       '#type' => 'url',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : NULL,
       '#size' => $this->getSetting('size'),
       '#placeholder' => $this->getSetting('placeholder'),
       '#maxlength' => $this->getFieldSetting('max_length'),
-    );
+    ];
     return $element;
   }
 
diff --git a/core/lib/Drupal/Core/Field/PluginSettingsBase.php b/core/lib/Drupal/Core/Field/PluginSettingsBase.php
index a6196ec52586d1aacec0721418f5c9dd97ec30e6..073bd2c787e1ac956f8cdd58c319038a667e36d5 100644
--- a/core/lib/Drupal/Core/Field/PluginSettingsBase.php
+++ b/core/lib/Drupal/Core/Field/PluginSettingsBase.php
@@ -17,7 +17,7 @@ abstract class PluginSettingsBase extends PluginBase implements PluginSettingsIn
    *
    * @var array
    */
-  protected $settings = array();
+  protected $settings = [];
 
   /**
    * The plugin settings injected by third party modules.
@@ -26,7 +26,7 @@ abstract class PluginSettingsBase extends PluginBase implements PluginSettingsIn
    *
    * @var array
    */
-  protected $thirdPartySettings = array();
+  protected $thirdPartySettings = [];
 
   /**
    * Whether default settings have been merged into the current $settings.
@@ -39,7 +39,7 @@ abstract class PluginSettingsBase extends PluginBase implements PluginSettingsIn
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array();
+    return [];
   }
 
   /**
@@ -140,11 +140,11 @@ public function getThirdPartyProviders() {
   public function calculateDependencies() {
     if (!empty($this->thirdPartySettings)) {
       // Create dependencies on any modules providing third party settings.
-      return array(
+      return [
         'module' => array_keys($this->thirdPartySettings)
-      );
+      ];
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/WidgetBase.php b/core/lib/Drupal/Core/Field/WidgetBase.php
index 497889582fcac3fe15b8ea2fa9b00ab3e525dfb2..b1579f2445aacc6fd60918ab962964eb8079a71a 100644
--- a/core/lib/Drupal/Core/Field/WidgetBase.php
+++ b/core/lib/Drupal/Core/Field/WidgetBase.php
@@ -48,7 +48,7 @@ abstract class WidgetBase extends PluginSettingsBase implements WidgetInterface
    *   Any third party settings.
    */
   public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings) {
-    parent::__construct(array(), $plugin_id, $plugin_definition);
+    parent::__construct([], $plugin_id, $plugin_definition);
     $this->fieldDefinition = $field_definition;
     $this->settings = $settings;
     $this->thirdPartySettings = $third_party_settings;
@@ -63,25 +63,25 @@ public function form(FieldItemListInterface $items, array &$form, FormStateInter
 
     // Store field information in $form_state.
     if (!static::getWidgetState($parents, $field_name, $form_state)) {
-      $field_state = array(
+      $field_state = [
         'items_count' => count($items),
-        'array_parents' => array(),
-      );
+        'array_parents' => [],
+      ];
       static::setWidgetState($parents, $field_name, $form_state, $field_state);
     }
 
     // Collect widget elements.
-    $elements = array();
+    $elements = [];
 
     // If the widget is handling multiple values (e.g Options), or if we are
     // displaying an individual element, just get a single form element and make
     // it the $delta value.
     if ($this->handlesMultipleValues() || isset($get_delta)) {
       $delta = isset($get_delta) ? $get_delta : 0;
-      $element = array(
+      $element = [
         '#title' => $this->fieldDefinition->getLabel(),
         '#description' => FieldFilteredMarkup::create(\Drupal::token()->replace($this->fieldDefinition->getDescription())),
-      );
+      ];
       $element = $this->formSingleElement($items, $delta, $element, $form, $form_state);
 
       if ($element) {
@@ -107,28 +107,28 @@ public function form(FieldItemListInterface $items, array &$form, FormStateInter
     // Populate the 'array_parents' information in $form_state->get('field')
     // after the form is built, so that we catch changes in the form structure
     // performed in alter() hooks.
-    $elements['#after_build'][] = array(get_class($this), 'afterBuild');
+    $elements['#after_build'][] = [get_class($this), 'afterBuild'];
     $elements['#field_name'] = $field_name;
     $elements['#field_parents'] = $parents;
     // Enforce the structure of submitted values.
-    $elements['#parents'] = array_merge($parents, array($field_name));
+    $elements['#parents'] = array_merge($parents, [$field_name]);
     // Most widgets need their internal structure preserved in submitted values.
-    $elements += array('#tree' => TRUE);
+    $elements += ['#tree' => TRUE];
 
-    return array(
+    return [
       // Aid in theming of widgets by rendering a classified container.
       '#type' => 'container',
       // Assign a different parent, to keep the main id for the widget itself.
-      '#parents' => array_merge($parents, array($field_name . '_wrapper')),
-      '#attributes' => array(
-        'class' => array(
+      '#parents' => array_merge($parents, [$field_name . '_wrapper']),
+      '#attributes' => [
+        'class' => [
           'field--type-' . Html::getClass($this->fieldDefinition->getType()),
           'field--name-' . Html::getClass($field_name),
           'field--widget-' . Html::getClass($this->getPluginId()),
-        ),
-      ),
+        ],
+      ],
       'widget' => $elements,
-    );
+    ];
   }
 
   /**
@@ -161,7 +161,7 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
     $title = $this->fieldDefinition->getLabel();
     $description = FieldFilteredMarkup::create(\Drupal::token()->replace($this->fieldDefinition->getDescription()));
 
-    $elements = array();
+    $elements = [];
 
     for ($delta = 0; $delta <= $max; $delta++) {
       // Add a new empty item if it doesn't exist yet at this delta.
@@ -193,15 +193,15 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
         if ($is_multiple) {
           // We name the element '_weight' to avoid clashing with elements
           // defined by widget.
-          $element['_weight'] = array(
+          $element['_weight'] = [
             '#type' => 'weight',
-            '#title' => $this->t('Weight for row @number', array('@number' => $delta + 1)),
+            '#title' => $this->t('Weight for row @number', ['@number' => $delta + 1]),
             '#title_display' => 'invisible',
             // Note: this 'delta' is the FAPI #type 'weight' element's property.
             '#delta' => $max,
             '#default_value' => $items[$delta]->_weight ?: $delta,
             '#weight' => 100,
-          );
+          ];
         }
 
         $elements[$delta] = $element;
@@ -209,7 +209,7 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
     }
 
     if ($elements) {
-      $elements += array(
+      $elements += [
         '#theme' => 'field_multiple_value_form',
         '#field_name' => $field_name,
         '#cardinality' => $cardinality,
@@ -218,28 +218,28 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
         '#title' => $title,
         '#description' => $description,
         '#max_delta' => $max,
-      );
+      ];
 
       // Add 'add more' button, if not working with a programmed form.
       if ($cardinality == FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED && !$form_state->isProgrammed()) {
-        $id_prefix = implode('-', array_merge($parents, array($field_name)));
+        $id_prefix = implode('-', array_merge($parents, [$field_name]));
         $wrapper_id = Html::getUniqueId($id_prefix . '-add-more-wrapper');
         $elements['#prefix'] = '<div id="' . $wrapper_id . '">';
         $elements['#suffix'] = '</div>';
 
-        $elements['add_more'] = array(
+        $elements['add_more'] = [
           '#type' => 'submit',
           '#name' => strtr($id_prefix, '-', '_') . '_add_more',
           '#value' => t('Add another item'),
-          '#attributes' => array('class' => array('field-add-more-submit')),
-          '#limit_validation_errors' => array(array_merge($parents, array($field_name))),
-          '#submit' => array(array(get_class($this), 'addMoreSubmit')),
-          '#ajax' => array(
-            'callback' => array(get_class($this), 'addMoreAjax'),
+          '#attributes' => ['class' => ['field-add-more-submit']],
+          '#limit_validation_errors' => [array_merge($parents, [$field_name])],
+          '#submit' => [[get_class($this), 'addMoreSubmit']],
+          '#ajax' => [
+            'callback' => [get_class($this), 'addMoreAjax'],
             'wrapper' => $wrapper_id,
             'effect' => 'fade',
-          ),
-        );
+          ],
+        ];
       }
     }
 
@@ -311,26 +311,26 @@ public static function addMoreAjax(array $form, FormStateInterface $form_state)
    * Generates the form element for a single copy of the widget.
    */
   protected function formSingleElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element += array(
+    $element += [
       '#field_parents' => $form['#parents'],
       // Only the first widget should be required.
       '#required' => $delta == 0 && $this->fieldDefinition->isRequired(),
       '#delta' => $delta,
       '#weight' => $delta,
-    );
+    ];
 
     $element = $this->formElement($items, $delta, $element, $form, $form_state);
 
     if ($element) {
       // Allow modules to alter the field widget form element.
-      $context = array(
+      $context = [
         'form' => $form,
         'widget' => $this,
         'items' => $items,
         'delta' => $delta,
         'default' => $this->isDefaultValueWidget($form_state),
-      );
-      \Drupal::moduleHandler()->alter(array('field_widget_form', 'field_widget_' . $this->getPluginId() . '_form'), $element, $form_state, $context);
+      ];
+      \Drupal::moduleHandler()->alter(['field_widget_form', 'field_widget_' . $this->getPluginId() . '_form'], $element, $form_state, $context);
     }
 
     return $element;
@@ -343,7 +343,7 @@ public function extractFormValues(FieldItemListInterface $items, array $form, Fo
     $field_name = $this->fieldDefinition->getName();
 
     // Extract the values from $form_state->getValues().
-    $path = array_merge($form['#parents'], array($field_name));
+    $path = array_merge($form['#parents'], [$field_name]);
     $key_exists = NULL;
     $values = NestedArray::getValue($form_state->getValues(), $path, $key_exists);
 
@@ -410,7 +410,7 @@ public function flagErrors(FieldItemListInterface $items, ConstraintViolationLis
       if (Element::isVisibleElement($element)) {
         $handles_multiple = $this->handlesMultipleValues();
 
-        $violations_by_delta = array();
+        $violations_by_delta = [];
         foreach ($violations as $violation) {
           // Separate violations by delta.
           $property_path = explode('.', $violation->getPropertyPath());
@@ -473,21 +473,21 @@ protected static function getWidgetStateParents(array $parents, $field_name) {
     // Field processing data is placed at
     // $form_state->get(['field_storage', '#parents', ...$parents..., '#fields', $field_name]),
     // to avoid clashes between field names and $parents parts.
-    return array_merge(array('field_storage', '#parents'), $parents, array('#fields', $field_name));
+    return array_merge(['field_storage', '#parents'], $parents, ['#fields', $field_name]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Field/WidgetPluginManager.php b/core/lib/Drupal/Core/Field/WidgetPluginManager.php
index 6be1b9ef8ea77d3bdc886060d48c05e12223bf4d..c7c2d796da7438fde907c2927bf7732adb3df1da 100644
--- a/core/lib/Drupal/Core/Field/WidgetPluginManager.php
+++ b/core/lib/Drupal/Core/Field/WidgetPluginManager.php
@@ -74,10 +74,10 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
    */
   public function getInstance(array $options) {
     // Fill in defaults for missing properties.
-    $options += array(
-      'configuration' => array(),
+    $options += [
+      'configuration' => [],
       'prepare' => TRUE,
-    );
+    ];
 
     $configuration = $options['configuration'];
     $field_definition = $options['field_definition'];
@@ -104,16 +104,16 @@ public function getInstance(array $options) {
       $plugin_id = $field_type_definition['default_widget'];
     }
 
-    $configuration += array(
+    $configuration += [
       'field_definition' => $field_definition,
-    );
+    ];
     return $this->createInstance($plugin_id, $configuration);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $plugin_definition = $this->getDefinition($plugin_id);
     $plugin_class = DefaultFactory::getPluginClass($plugin_id, $plugin_definition);
 
@@ -139,10 +139,10 @@ public function createInstance($plugin_id, array $configuration = array()) {
    */
   public function prepareConfiguration($field_type, array $configuration) {
     // Fill in defaults for missing properties.
-    $configuration += array(
-      'settings' => array(),
-      'third_party_settings' => array(),
-    );
+    $configuration += [
+      'settings' => [],
+      'third_party_settings' => [],
+    ];
     // If no widget is specified, use the default widget.
     if (!isset($configuration['type'])) {
       $field_type = $this->fieldTypeManager->getDefinition($field_type);
@@ -168,10 +168,10 @@ public function prepareConfiguration($field_type, array $configuration) {
    */
   public function getOptions($field_type = NULL) {
     if (!isset($this->widgetOptions)) {
-      $options = array();
+      $options = [];
       $field_types = $this->fieldTypeManager->getDefinitions();
       $widget_types = $this->getDefinitions();
-      uasort($widget_types, array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
+      uasort($widget_types, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
       foreach ($widget_types as $name => $widget_type) {
         foreach ($widget_type['field_types'] as $widget_field_type) {
           // Check that the field type exists.
@@ -183,7 +183,7 @@ public function getOptions($field_type = NULL) {
       $this->widgetOptions = $options;
     }
     if (isset($field_type)) {
-      return !empty($this->widgetOptions[$field_type]) ? $this->widgetOptions[$field_type] : array();
+      return !empty($this->widgetOptions[$field_type]) ? $this->widgetOptions[$field_type] : [];
     }
 
     return $this->widgetOptions;
@@ -206,7 +206,7 @@ public function getDefaultSettings($type) {
       return $plugin_class::defaultSettings();
     }
 
-    return array();
+    return [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/File/FileSystem.php b/core/lib/Drupal/Core/File/FileSystem.php
index a2fafbb60dae681d9ab50e16014a893fa146ee12..9f92d0bd8b225b0854f0af988a2d9bf6f6cbfbdd 100644
--- a/core/lib/Drupal/Core/File/FileSystem.php
+++ b/core/lib/Drupal/Core/File/FileSystem.php
@@ -95,7 +95,7 @@ public function chmod($uri, $mode = NULL) {
       return TRUE;
     }
 
-    $this->logger->error('The file permissions could not be set on %uri.', array('%uri' => $uri));
+    $this->logger->error('The file permissions could not be set on %uri.', ['%uri' => $uri]);
     return FALSE;
   }
 
diff --git a/core/lib/Drupal/Core/File/MimeType/ExtensionMimeTypeGuesser.php b/core/lib/Drupal/Core/File/MimeType/ExtensionMimeTypeGuesser.php
index 8e5c95a2c0ad6bfe95a08de32f20dab711ae1f33..cc54d6c1c249ded75bdf06009d494849c88fba39 100644
--- a/core/lib/Drupal/Core/File/MimeType/ExtensionMimeTypeGuesser.php
+++ b/core/lib/Drupal/Core/File/MimeType/ExtensionMimeTypeGuesser.php
@@ -16,8 +16,8 @@ class ExtensionMimeTypeGuesser implements MimeTypeGuesserInterface {
    * @var array
    *   Array of mimetypes correlated to the extensions that relate to them.
    */
-  protected $defaultMapping = array(
-    'mimetypes' => array(
+  protected $defaultMapping = [
+    'mimetypes' => [
       0 => 'application/andrew-inset',
       1 => 'application/atom',
       2 => 'application/atomcat+xml',
@@ -377,10 +377,10 @@ class ExtensionMimeTypeGuesser implements MimeTypeGuesserInterface {
       343 => 'x-conference/x-cooltalk',
       344 => 'x-epoc/x-sisx-app',
       345 => 'x-world/x-vrml',
-    ),
+    ],
 
     // Extensions added to this list MUST be lower-case.
-    'extensions' => array(
+    'extensions' => [
       'ez' => 0,
       'atom' => 1,
       'atomcat' => 2,
@@ -856,8 +856,8 @@ class ExtensionMimeTypeGuesser implements MimeTypeGuesserInterface {
       'weba' => 356,
       'webm' => 357,
       'vtt' => 358,
-    ),
-  );
+    ],
+  ];
 
   /**
    * The MIME types mapping array after going through the module handler.
diff --git a/core/lib/Drupal/Core/File/MimeType/MimeTypeGuesser.php b/core/lib/Drupal/Core/File/MimeType/MimeTypeGuesser.php
index 85d0261631f3477666e6f142129d762d12492f2c..a8ad4010bd11890517459c81ca525d425bfc1e8d 100644
--- a/core/lib/Drupal/Core/File/MimeType/MimeTypeGuesser.php
+++ b/core/lib/Drupal/Core/File/MimeType/MimeTypeGuesser.php
@@ -17,7 +17,7 @@ class MimeTypeGuesser implements MimeTypeGuesserInterface {
    *
    * @var array
    */
-  protected $guessers = array();
+  protected $guessers = [];
 
   /**
    * Holds the array of guessers sorted by priority.
@@ -98,7 +98,7 @@ public function addGuesser(MimeTypeGuesserInterface $guesser, $priority = 0) {
    *   A sorted array of MIME type guesser objects.
    */
   protected function sortGuessers() {
-    $sorted = array();
+    $sorted = [];
     krsort($this->guessers);
 
     foreach ($this->guessers as $guesser) {
diff --git a/core/lib/Drupal/Core/File/file.api.php b/core/lib/Drupal/Core/File/file.api.php
index d1e125e53632bf19086f82f5155105751f1ce0e4..506884fad3644129f031c50f51c949fd26713053 100644
--- a/core/lib/Drupal/Core/File/file.api.php
+++ b/core/lib/Drupal/Core/File/file.api.php
@@ -33,9 +33,9 @@ function hook_file_download($uri) {
   $scheme = file_uri_scheme($uri);
   $target = file_uri_target($uri);
   if ($scheme == 'temporary' && $target == 'config.tar.gz') {
-    return array(
+    return [
       'Content-disposition' => 'attachment; filename="config.tar.gz"',
-    );
+    ];
   }
 }
 
@@ -64,11 +64,11 @@ function hook_file_url_alter(&$uri) {
 
   $cdn1 = 'http://cdn1.example.com';
   $cdn2 = 'http://cdn2.example.com';
-  $cdn_extensions = array('css', 'js', 'gif', 'jpg', 'jpeg', 'png');
+  $cdn_extensions = ['css', 'js', 'gif', 'jpg', 'jpeg', 'png'];
 
   // Most CDNs don't support private file transfers without a lot of hassle,
   // so don't support this in the common case.
-  $schemes = array('public');
+  $schemes = ['public'];
 
   $scheme = file_uri_scheme($uri);
 
@@ -166,11 +166,11 @@ function hook_archiver_info_alter(&$info) {
  * @see drupal_get_filetransfer_info()
  */
 function hook_filetransfer_info() {
-  $info['sftp'] = array(
+  $info['sftp'] = [
     'title' => t('SFTP (Secure FTP)'),
     'class' => 'Drupal\Core\FileTransfer\SFTP',
     'weight' => 10,
-  );
+  ];
   return $info;
 }
 
diff --git a/core/lib/Drupal/Core/FileTransfer/FTPExtension.php b/core/lib/Drupal/Core/FileTransfer/FTPExtension.php
index 3617a63c9e213423fac23948cd69b8699eb8b22a..7cb0c540c7773eb1562a4799c176bc6a7ad474a9 100644
--- a/core/lib/Drupal/Core/FileTransfer/FTPExtension.php
+++ b/core/lib/Drupal/Core/FileTransfer/FTPExtension.php
@@ -26,7 +26,7 @@ public function connect() {
    */
   protected function copyFileJailed($source, $destination) {
     if (!@ftp_put($this->connection, $destination, $source, FTP_BINARY)) {
-      throw new FileTransferException("Cannot move @source to @destination", NULL, array("@source" => $source, "@destination" => $destination));
+      throw new FileTransferException("Cannot move @source to @destination", NULL, ["@source" => $source, "@destination" => $destination]);
     }
   }
 
@@ -35,7 +35,7 @@ protected function copyFileJailed($source, $destination) {
    */
   protected function createDirectoryJailed($directory) {
     if (!ftp_mkdir($this->connection, $directory)) {
-      throw new FileTransferException("Cannot create directory @directory", NULL, array("@directory" => $directory));
+      throw new FileTransferException("Cannot create directory @directory", NULL, ["@directory" => $directory]);
     }
   }
 
@@ -45,11 +45,11 @@ protected function createDirectoryJailed($directory) {
   protected function removeDirectoryJailed($directory) {
     $pwd = ftp_pwd($this->connection);
     if (!ftp_chdir($this->connection, $directory)) {
-      throw new FileTransferException("Unable to change to directory @directory", NULL, array('@directory' => $directory));
+      throw new FileTransferException("Unable to change to directory @directory", NULL, ['@directory' => $directory]);
     }
     $list = @ftp_nlist($this->connection, '.');
     if (!$list) {
-      $list = array();
+      $list = [];
     }
     foreach ($list as $item) {
       if ($item == '.' || $item == '..') {
@@ -65,7 +65,7 @@ protected function removeDirectoryJailed($directory) {
     }
     ftp_chdir($this->connection, $pwd);
     if (!ftp_rmdir($this->connection, $directory)) {
-      throw new FileTransferException("Unable to remove to directory @directory", NULL, array('@directory' => $directory));
+      throw new FileTransferException("Unable to remove to directory @directory", NULL, ['@directory' => $directory]);
     }
   }
 
@@ -74,7 +74,7 @@ protected function removeDirectoryJailed($directory) {
    */
   protected function removeFileJailed($destination) {
     if (!ftp_delete($this->connection, $destination)) {
-      throw new FileTransferException("Unable to remove to file @file", NULL, array('@file' => $destination));
+      throw new FileTransferException("Unable to remove to file @file", NULL, ['@file' => $destination]);
     }
   }
 
@@ -103,7 +103,7 @@ public function isFile($path) {
    */
   function chmodJailed($path, $mode, $recursive) {
     if (!ftp_chmod($this->connection, $mode, $path)) {
-      throw new FileTransferException("Unable to set permissions on %file", NULL, array('%file' => $path));
+      throw new FileTransferException("Unable to set permissions on %file", NULL, ['%file' => $path]);
     }
     if ($this->isDirectory($path) && $recursive) {
       $filelist = @ftp_nlist($this->connection, $path);
diff --git a/core/lib/Drupal/Core/FileTransfer/FileTransfer.php b/core/lib/Drupal/Core/FileTransfer/FileTransfer.php
index dbe2559c0f9fe7c1961891a0cdd25cccc0ba7f60..a3cf6781e009fb25bc4c4963cef1f29e15f401e3 100644
--- a/core/lib/Drupal/Core/FileTransfer/FileTransfer.php
+++ b/core/lib/Drupal/Core/FileTransfer/FileTransfer.php
@@ -210,7 +210,7 @@ protected final function checkPath($path) {
     $full_path = drupal_realpath(substr($this->chroot . $path, 0, strlen($full_jail)));
     $full_path = $this->fixRemotePath($full_path, FALSE);
     if ($full_jail !== $full_path) {
-      throw new FileTransferException('@directory is outside of the @jail', NULL, array('@directory' => $path, '@jail' => $this->jail));
+      throw new FileTransferException('@directory is outside of the @jail', NULL, ['@directory' => $path, '@jail' => $this->jail]);
     }
   }
 
@@ -388,30 +388,30 @@ function setChroot() {
    *   An array that contains a Form API definition.
    */
   public function getSettingsForm() {
-    $form['username'] = array(
+    $form['username'] = [
       '#type' => 'textfield',
       '#title' => t('Username'),
-    );
-    $form['password'] = array(
+    ];
+    $form['password'] = [
       '#type' => 'password',
       '#title' => t('Password'),
       '#description' => t('Your password is not saved in the database and is only used to establish a connection.'),
-    );
-    $form['advanced'] = array(
+    ];
+    $form['advanced'] = [
       '#type' => 'details',
       '#title' => t('Advanced settings'),
-    );
-    $form['advanced']['hostname'] = array(
+    ];
+    $form['advanced']['hostname'] = [
       '#type' => 'textfield',
       '#title' => t('Host'),
       '#default_value' => 'localhost',
       '#description' => t('The connection will be created between your web server and the machine hosting the web server files. In the vast majority of cases, this will be the same machine, and "localhost" is correct.'),
-    );
-    $form['advanced']['port'] = array(
+    ];
+    $form['advanced']['port'] = [
       '#type' => 'textfield',
       '#title' => t('Port'),
       '#default_value' => NULL,
-    );
+    ];
     return $form;
   }
 
diff --git a/core/lib/Drupal/Core/FileTransfer/FileTransferException.php b/core/lib/Drupal/Core/FileTransfer/FileTransferException.php
index 15e657012a8843975bd46477910d1883b6a9893e..f8d0d07f4062f2ed0e40941029677f487b5b6458 100644
--- a/core/lib/Drupal/Core/FileTransfer/FileTransferException.php
+++ b/core/lib/Drupal/Core/FileTransfer/FileTransferException.php
@@ -24,7 +24,7 @@ class FileTransferException extends \RuntimeException {
    * @param array $arguments
    *   Arguments to be used in this exception.
    */
-  function __construct($message, $code = 0, $arguments = array()) {
+  function __construct($message, $code = 0, $arguments = []) {
     parent::__construct($message, $code);
     $this->arguments = $arguments;
   }
diff --git a/core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php b/core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php
index 647463aadc7c5cb45ffbcde6f010d838022f3222..2adbd1f0f0b78ed1f62b34cb3a9117518afe3044 100644
--- a/core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php
+++ b/core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php
@@ -51,37 +51,37 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Get all the available ways to transfer files.
     if (empty($_SESSION['authorize_filetransfer_info'])) {
       drupal_set_message($this->t('Unable to continue, no available methods of file transfer'), 'error');
-      return array();
+      return [];
     }
     $available_backends = $_SESSION['authorize_filetransfer_info'];
 
     if (!$this->getRequest()->isSecure()) {
-      $form['information']['https_warning'] = array(
+      $form['information']['https_warning'] = [
         '#prefix' => '<div class="messages messages--error">',
-        '#markup' => $this->t('WARNING: You are not using an encrypted connection, so your password will be sent in plain text. <a href=":https-link">Learn more</a>.', array(':https-link' => 'https://www.drupal.org/https-information')),
+        '#markup' => $this->t('WARNING: You are not using an encrypted connection, so your password will be sent in plain text. <a href=":https-link">Learn more</a>.', [':https-link' => 'https://www.drupal.org/https-information']),
         '#suffix' => '</div>',
-      );
+      ];
     }
 
     // Decide on a default backend.
-    $authorize_filetransfer_default = $form_state->getValue(array('connection_settings', 'authorize_filetransfer_default'));
+    $authorize_filetransfer_default = $form_state->getValue(['connection_settings', 'authorize_filetransfer_default']);
     if (!$authorize_filetransfer_default) {
       $authorize_filetransfer_default = key($available_backends);
     }
 
-    $form['information']['main_header'] = array(
+    $form['information']['main_header'] = [
       '#prefix' => '<h3>',
       '#markup' => $this->t('To continue, provide your server connection details'),
       '#suffix' => '</h3>',
-    );
+    ];
 
     $form['connection_settings']['#tree'] = TRUE;
-    $form['connection_settings']['authorize_filetransfer_default'] = array(
+    $form['connection_settings']['authorize_filetransfer_default'] = [
       '#type' => 'select',
       '#title' => $this->t('Connection method'),
       '#default_value' => $authorize_filetransfer_default,
       '#weight' => -10,
-    );
+    ];
 
     /*
      * Here we create two submit buttons. For a JS enabled client, they will
@@ -90,46 +90,46 @@ public function buildForm(array $form, FormStateInterface $form_state) {
      * what filetransfer type to use, and submit_process on the second one (which
      * leads to the actual operation).
      */
-    $form['submit_connection'] = array(
+    $form['submit_connection'] = [
       '#prefix' => "<br style='clear:both'/>",
       '#name' => 'enter_connection_settings',
       '#type' => 'submit',
       '#value' => $this->t('Enter connection settings'),
       '#weight' => 100,
-    );
+    ];
 
-    $form['submit_process'] = array(
+    $form['submit_process'] = [
       '#name' => 'process_updates',
       '#type' => 'submit',
       '#value' => $this->t('Continue'),
       '#weight' => 100,
-    );
+    ];
 
     // Build a container for each connection type.
     foreach ($available_backends as $name => $backend) {
       $form['connection_settings']['authorize_filetransfer_default']['#options'][$name] = $backend['title'];
-      $form['connection_settings'][$name] = array(
+      $form['connection_settings'][$name] = [
         '#type' => 'container',
-        '#attributes' => array('class' => array("filetransfer-$name", 'filetransfer')),
-        '#states' => array(
-          'visible' => array(
-            'select[name="connection_settings[authorize_filetransfer_default]"]' => array('value' => $name),
-          ),
-        ),
-      );
+        '#attributes' => ['class' => ["filetransfer-$name", 'filetransfer']],
+        '#states' => [
+          'visible' => [
+            'select[name="connection_settings[authorize_filetransfer_default]"]' => ['value' => $name],
+          ],
+        ],
+      ];
       // We can't use #prefix on the container itself since then the header won't
       // be hidden and shown when the containers are being manipulated via JS.
-      $form['connection_settings'][$name]['header'] = array(
-        '#markup' => '<h4>' . $this->t('@backend connection settings', array('@backend' => $backend['title'])) . '</h4>',
-      );
+      $form['connection_settings'][$name]['header'] = [
+        '#markup' => '<h4>' . $this->t('@backend connection settings', ['@backend' => $backend['title']]) . '</h4>',
+      ];
 
       $form['connection_settings'][$name] += $this->addConnectionSettings($name);
 
       // Start non-JS code.
-      if ($form_state->getValue(array('connection_settings', 'authorize_filetransfer_default')) == $name) {
+      if ($form_state->getValue(['connection_settings', 'authorize_filetransfer_default']) == $name) {
 
         // Change the submit button to the submit_process one.
-        $form['submit_process']['#attributes'] = array();
+        $form['submit_process']['#attributes'] = [];
         unset($form['submit_connection']);
 
         // Activate the proper filetransfer settings form.
@@ -138,13 +138,13 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         $form['connection_settings']['authorize_filetransfer_default']['#disabled'] = TRUE;
 
         // Create a button for changing the type of connection.
-        $form['connection_settings']['change_connection_type'] = array(
+        $form['connection_settings']['change_connection_type'] = [
           '#name' => 'change_connection_type',
           '#type' => 'submit',
           '#value' => $this->t('Change connection type'),
           '#weight' => -5,
-          '#attributes' => array('class' => array('filetransfer-change-connection-type')),
-        );
+          '#attributes' => ['class' => ['filetransfer-change-connection-type']],
+        ];
       }
       // End non-JS code.
     }
@@ -166,17 +166,17 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
       $filetransfer = $this->getFiletransfer($backend, $form_connection_settings[$backend]);
       try {
         if (!$filetransfer) {
-          throw new \Exception($this->t('The connection protocol %backend does not exist.', array('%backend' => $backend)));
+          throw new \Exception($this->t('The connection protocol %backend does not exist.', ['%backend' => $backend]));
         }
         $filetransfer->connect();
       }
       catch (\Exception $e) {
         // The format of this error message is similar to that used on the
         // database connection form in the installer.
-        $form_state->setErrorByName('connection_settings', $this->t('Failed to connect to the server. The server reports the following message: <p class="error">@message</p> For more help installing or updating code on your server, see the <a href=":handbook_url">handbook</a>.', array(
+        $form_state->setErrorByName('connection_settings', $this->t('Failed to connect to the server. The server reports the following message: <p class="error">@message</p> For more help installing or updating code on your server, see the <a href=":handbook_url">handbook</a>.', [
           '@message' => $e->getMessage(),
           ':handbook_url' => 'https://www.drupal.org/documentation/install/modules-themes',
-        )));
+        ]));
       }
     }
   }
@@ -218,7 +218,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
       case 'change_connection_type':
         $form_state->setRebuild();
-        $form_state->unsetValue(array('connection_settings', 'authorize_filetransfer_default'));
+        $form_state->unsetValue(['connection_settings', 'authorize_filetransfer_default']);
         break;
     }
   }
@@ -235,7 +235,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
    *   An instantiated FileTransfer object for the requested method and settings,
    *   or FALSE if there was an error finding or instantiating it.
    */
-  protected function getFiletransfer($backend, $settings = array()) {
+  protected function getFiletransfer($backend, $settings = []) {
     $filetransfer = FALSE;
     if (!empty($_SESSION['authorize_filetransfer_info'][$backend])) {
       $backend_info = $_SESSION['authorize_filetransfer_info'][$backend];
@@ -258,8 +258,8 @@ protected function getFiletransfer($backend, $settings = array()) {
    * @see hook_filetransfer_backends()
    */
   protected function addConnectionSettings($backend) {
-    $defaults = array();
-    $form = array();
+    $defaults = [];
+    $form = [];
 
     // Create an instance of the file transfer class to get its settings form.
     $filetransfer = $this->getFiletransfer($backend);
@@ -320,7 +320,7 @@ protected function runOperation($filetransfer) {
     unset($_SESSION['authorize_operation']);
 
     require_once $operation['file'];
-    return call_user_func_array($operation['callback'], array_merge(array($filetransfer), $operation['arguments']));
+    return call_user_func_array($operation['callback'], array_merge([$filetransfer], $operation['arguments']));
   }
 
 }
diff --git a/core/lib/Drupal/Core/FileTransfer/Local.php b/core/lib/Drupal/Core/FileTransfer/Local.php
index e6879316d8fe9246fb3234af359326b845f6baa8..9320f4a3a1d2ca1dab2a1886ad6365f5f197e3de 100644
--- a/core/lib/Drupal/Core/FileTransfer/Local.php
+++ b/core/lib/Drupal/Core/FileTransfer/Local.php
@@ -26,7 +26,7 @@ static function factory($jail, $settings) {
    */
   protected function copyFileJailed($source, $destination) {
     if (@!copy($source, $destination)) {
-      throw new FileTransferException('Cannot copy %source to %destination.', NULL, array('%source' => $source, '%destination' => $destination));
+      throw new FileTransferException('Cannot copy %source to %destination.', NULL, ['%source' => $source, '%destination' => $destination]);
     }
   }
 
@@ -35,7 +35,7 @@ protected function copyFileJailed($source, $destination) {
    */
   protected function createDirectoryJailed($directory) {
     if (!is_dir($directory) && @!mkdir($directory, 0777, TRUE)) {
-      throw new FileTransferException('Cannot create directory %directory.', NULL, array('%directory' => $directory));
+      throw new FileTransferException('Cannot create directory %directory.', NULL, ['%directory' => $directory]);
     }
   }
 
@@ -45,22 +45,22 @@ protected function createDirectoryJailed($directory) {
   protected function removeDirectoryJailed($directory) {
     if (!is_dir($directory)) {
       // Programmer error assertion, not something we expect users to see.
-      throw new FileTransferException('removeDirectoryJailed() called with a path (%directory) that is not a directory.', NULL, array('%directory' => $directory));
+      throw new FileTransferException('removeDirectoryJailed() called with a path (%directory) that is not a directory.', NULL, ['%directory' => $directory]);
     }
     foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($directory, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::CHILD_FIRST) as $filename => $file) {
       if ($file->isDir()) {
         if (@!drupal_rmdir($filename)) {
-          throw new FileTransferException('Cannot remove directory %directory.', NULL, array('%directory' => $filename));
+          throw new FileTransferException('Cannot remove directory %directory.', NULL, ['%directory' => $filename]);
         }
       }
       elseif ($file->isFile()) {
         if (@!drupal_unlink($filename)) {
-          throw new FileTransferException('Cannot remove file %file.', NULL, array('%file' => $filename));
+          throw new FileTransferException('Cannot remove file %file.', NULL, ['%file' => $filename]);
         }
       }
     }
     if (@!drupal_rmdir($directory)) {
-      throw new FileTransferException('Cannot remove directory %directory.', NULL, array('%directory' => $directory));
+      throw new FileTransferException('Cannot remove directory %directory.', NULL, ['%directory' => $directory]);
     }
   }
 
@@ -69,7 +69,7 @@ protected function removeDirectoryJailed($directory) {
    */
   protected function removeFileJailed($file) {
     if (@!drupal_unlink($file)) {
-      throw new FileTransferException('Cannot remove file %file.', NULL, array('%file' => $file));
+      throw new FileTransferException('Cannot remove file %file.', NULL, ['%file' => $file]);
     }
   }
 
@@ -94,12 +94,12 @@ public function chmodJailed($path, $mode, $recursive) {
     if ($recursive && is_dir($path)) {
       foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::SELF_FIRST) as $filename => $file) {
         if (@!chmod($filename, $mode)) {
-          throw new FileTransferException('Cannot chmod %path.', NULL, array('%path' => $filename));
+          throw new FileTransferException('Cannot chmod %path.', NULL, ['%path' => $filename]);
         }
       }
     }
     elseif (@!chmod($path, $mode)) {
-      throw new FileTransferException('Cannot chmod %path.', NULL, array('%path' => $path));
+      throw new FileTransferException('Cannot chmod %path.', NULL, ['%path' => $path]);
     }
   }
 
diff --git a/core/lib/Drupal/Core/FileTransfer/SSH.php b/core/lib/Drupal/Core/FileTransfer/SSH.php
index 8250c1641d51775e03016383009438579196dd49..256aaf4c635839117d5285d1354e9248841cb2c9 100644
--- a/core/lib/Drupal/Core/FileTransfer/SSH.php
+++ b/core/lib/Drupal/Core/FileTransfer/SSH.php
@@ -24,7 +24,7 @@ function __construct($jail, $username, $password, $hostname = "localhost", $port
   public function connect() {
     $this->connection = @ssh2_connect($this->hostname, $this->port);
     if (!$this->connection) {
-      throw new FileTransferException('SSH Connection failed to @host:@port', NULL, array('@host' => $this->hostname, '@port' => $this->port));
+      throw new FileTransferException('SSH Connection failed to @host:@port', NULL, ['@host' => $this->hostname, '@port' => $this->port]);
     }
     if (!@ssh2_auth_password($this->connection, $this->username, $this->password)) {
       throw new FileTransferException('The supplied username/password combination was not accepted.');
@@ -47,7 +47,7 @@ static function factory($jail, $settings) {
    */
   protected function copyFileJailed($source, $destination) {
     if (!@ssh2_scp_send($this->connection, $source, $destination)) {
-      throw new FileTransferException('Cannot copy @source_file to @destination_file.', NULL, array('@source' => $source, '@destination' => $destination));
+      throw new FileTransferException('Cannot copy @source_file to @destination_file.', NULL, ['@source' => $source, '@destination' => $destination]);
     }
   }
 
@@ -56,7 +56,7 @@ protected function copyFileJailed($source, $destination) {
    */
   protected function copyDirectoryJailed($source, $destination) {
     if (@!ssh2_exec($this->connection, 'cp -Rp ' . escapeshellarg($source) . ' ' . escapeshellarg($destination))) {
-      throw new FileTransferException('Cannot copy directory @directory.', NULL, array('@directory' => $source));
+      throw new FileTransferException('Cannot copy directory @directory.', NULL, ['@directory' => $source]);
     }
   }
 
@@ -65,7 +65,7 @@ protected function copyDirectoryJailed($source, $destination) {
    */
   protected function createDirectoryJailed($directory) {
     if (@!ssh2_exec($this->connection, 'mkdir ' . escapeshellarg($directory))) {
-      throw new FileTransferException('Cannot create directory @directory.', NULL, array('@directory' => $directory));
+      throw new FileTransferException('Cannot create directory @directory.', NULL, ['@directory' => $directory]);
     }
   }
 
@@ -74,7 +74,7 @@ protected function createDirectoryJailed($directory) {
    */
   protected function removeDirectoryJailed($directory) {
     if (@!ssh2_exec($this->connection, 'rm -Rf ' . escapeshellarg($directory))) {
-      throw new FileTransferException('Cannot remove @directory.', NULL, array('@directory' => $directory));
+      throw new FileTransferException('Cannot remove @directory.', NULL, ['@directory' => $directory]);
     }
   }
 
@@ -83,7 +83,7 @@ protected function removeDirectoryJailed($directory) {
    */
   protected function removeFileJailed($destination) {
     if (!@ssh2_exec($this->connection, 'rm ' . escapeshellarg($destination))) {
-      throw new FileTransferException('Cannot remove @directory.', NULL, array('@directory' => $destination));
+      throw new FileTransferException('Cannot remove @directory.', NULL, ['@directory' => $destination]);
     }
   }
 
@@ -103,7 +103,7 @@ public function isDirectory($path) {
       return FALSE;
     }
     else {
-      throw new FileTransferException('Cannot check @path.', NULL, array('@path' => $path));
+      throw new FileTransferException('Cannot check @path.', NULL, ['@path' => $path]);
     }
   }
 
@@ -120,7 +120,7 @@ public function isFile($path) {
       return FALSE;
     }
     else {
-      throw new FileTransferException('Cannot check @path.', NULL, array('@path' => $path));
+      throw new FileTransferException('Cannot check @path.', NULL, ['@path' => $path]);
     }
   }
 
@@ -130,7 +130,7 @@ public function isFile($path) {
   function chmodJailed($path, $mode, $recursive) {
     $cmd = sprintf("chmod %s%o %s", $recursive ? '-R ' : '', $mode, escapeshellarg($path));
     if (@!ssh2_exec($this->connection, $cmd)) {
-      throw new FileTransferException('Cannot change permissions of @path.', NULL, array('@path' => $path));
+      throw new FileTransferException('Cannot change permissions of @path.', NULL, ['@path' => $path]);
     }
   }
 
diff --git a/core/lib/Drupal/Core/Flood/DatabaseBackend.php b/core/lib/Drupal/Core/Flood/DatabaseBackend.php
index 4b2f0d00c172a6566755d31b0ea705f645ea65f7..12e9102af0e752251ebce4d9487f36cd2a72f8d8 100644
--- a/core/lib/Drupal/Core/Flood/DatabaseBackend.php
+++ b/core/lib/Drupal/Core/Flood/DatabaseBackend.php
@@ -80,12 +80,12 @@ public function register($name, $window = 3600, $identifier = NULL) {
    */
   protected function doInsert($name, $window, $identifier) {
     $this->connection->insert(static::TABLE_NAME)
-      ->fields(array(
+      ->fields([
         'event' => $name,
         'identifier' => $identifier,
         'timestamp' => REQUEST_TIME,
         'expiration' => REQUEST_TIME + $window,
-      ))
+      ])
       ->execute();
   }
 
diff --git a/core/lib/Drupal/Core/Flood/MemoryBackend.php b/core/lib/Drupal/Core/Flood/MemoryBackend.php
index 5b3377e8d8d9ac3aa02b5d982c5d4b0f8e9e75aa..ddb42bc4cd6fd5e5d5e6a28529f7178d212afd4a 100644
--- a/core/lib/Drupal/Core/Flood/MemoryBackend.php
+++ b/core/lib/Drupal/Core/Flood/MemoryBackend.php
@@ -19,7 +19,7 @@ class MemoryBackend implements FloodInterface {
   /**
    * An array holding flood events, keyed by event name and identifier.
    */
-  protected $events = array();
+  protected $events = [];
 
   /**
    * Construct the MemoryBackend.
diff --git a/core/lib/Drupal/Core/Form/ConfigFormBase.php b/core/lib/Drupal/Core/Form/ConfigFormBase.php
index fb508f85459afd9ffa53baf66a123b430e467613..e7878a7db0452f860908ca5531452512feaeedae 100644
--- a/core/lib/Drupal/Core/Form/ConfigFormBase.php
+++ b/core/lib/Drupal/Core/Form/ConfigFormBase.php
@@ -35,11 +35,11 @@ public static function create(ContainerInterface $container) {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save configuration'),
       '#button_type' => 'primary',
-    );
+    ];
 
     // By default, render the form using system-config-form.html.twig.
     $form['#theme'] = 'system_config_form';
diff --git a/core/lib/Drupal/Core/Form/ConfirmFormBase.php b/core/lib/Drupal/Core/Form/ConfirmFormBase.php
index 6de9fdfcd6d85ec48842b6124b50c0d60658f612..4214bfcabd1c532b8c7e194121c4b6e7a494c675 100644
--- a/core/lib/Drupal/Core/Form/ConfirmFormBase.php
+++ b/core/lib/Drupal/Core/Form/ConfirmFormBase.php
@@ -42,15 +42,15 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['#title'] = $this->getQuestion();
 
     $form['#attributes']['class'][] = 'confirmation';
-    $form['description'] = array('#markup' => $this->getDescription());
-    $form[$this->getFormName()] = array('#type' => 'hidden', '#value' => 1);
+    $form['description'] = ['#markup' => $this->getDescription()];
+    $form[$this->getFormName()] = ['#type' => 'hidden', '#value' => 1];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->getConfirmText(),
       '#button_type' => 'primary',
-    );
+    ];
 
     $form['actions']['cancel'] = ConfirmFormHelper::buildCancelLink($this, $this->getRequest());
 
diff --git a/core/lib/Drupal/Core/Form/FormBuilder.php b/core/lib/Drupal/Core/Form/FormBuilder.php
index 803b4f1c57a88950eaee8475896df675694bb07b..c4a1fd266c31f91f2a49f24aef8d1fe2155ae2cc 100644
--- a/core/lib/Drupal/Core/Form/FormBuilder.php
+++ b/core/lib/Drupal/Core/Form/FormBuilder.php
@@ -496,7 +496,7 @@ public function retrieveForm($form_id, FormStateInterface &$form_state) {
 
     $callback = [$form_state->getFormObject(), 'buildForm'];
 
-    $form = array();
+    $form = [];
     // Assign a default CSS class name based on $form_id.
     // This happens here and not in self::prepareForm() in order to allow the
     // form constructor function to override or remove the default class.
@@ -509,7 +509,7 @@ public function retrieveForm($form_id, FormStateInterface &$form_state) {
     // We need to pass $form_state by reference in order for forms to modify it,
     // since call_user_func_array() requires that referenced variables are
     // passed explicitly.
-    $args = array_merge(array($form, &$form_state), $args);
+    $args = array_merge([$form, &$form_state], $args);
 
     $form = call_user_func_array($callback, $args);
     // If the form returns a response, skip subsequent page construction by
@@ -716,7 +716,7 @@ public function prepareForm($form_id, &$form, FormStateInterface &$form_state) {
     if (!isset($form['#build_id'])) {
       $form['#build_id'] = 'form-' . Crypt::randomBytesBase64();
     }
-    $form['form_build_id'] = array(
+    $form['form_build_id'] = [
       '#type' => 'hidden',
       '#value' => $form['#build_id'],
       '#id' => $form['#build_id'],
@@ -724,8 +724,8 @@ public function prepareForm($form_id, &$form, FormStateInterface &$form_state) {
       // Form processing and validation requires this value, so ensure the
       // submitted form value appears literally, regardless of custom #tree
       // and #parents being set elsewhere.
-      '#parents' => array('form_build_id'),
-    );
+      '#parents' => ['form_build_id'],
+    ];
 
     // Add a token, based on either #token or form_id, to any form displayed to
     // authenticated users. This ensures that any submitted form was actually
@@ -748,14 +748,14 @@ public function prepareForm($form_id, &$form, FormStateInterface &$form_state) {
         $placeholder = 'form_token_placeholder_' . Crypt::hashBase64($form_id);
         $form['#token'] = $placeholder;
 
-        $form['form_token'] = array(
+        $form['form_token'] = [
           '#id' => Html::getUniqueId('edit-' . $form_id . '-form-token'),
           '#type' => 'token',
           '#default_value' => $placeholder,
           // Form processing and validation requires this value, so ensure the
           // submitted form value appears literally, regardless of custom #tree
           // and #parents being set elsewhere.
-          '#parents' => array('form_token'),
+          '#parents' => ['form_token'],
           // Instead of setting an actual CSRF token, we've set the placeholder
           // in form_token's #default_value and #placeholder. These will be
           // replaced at the very last moment. This ensures forms with a CSRF
@@ -770,20 +770,20 @@ public function prepareForm($form_id, &$form, FormStateInterface &$form_state) {
           '#cache' => [
             'max-age' => 0,
           ],
-        );
+        ];
       }
     }
 
     if (isset($form_id)) {
-      $form['form_id'] = array(
+      $form['form_id'] = [
         '#type' => 'hidden',
         '#value' => $form_id,
         '#id' => Html::getUniqueId("edit-$form_id"),
         // Form processing and validation requires this value, so ensure the
         // submitted form value appears literally, regardless of custom #tree
         // and #parents being set elsewhere.
-        '#parents' => array('form_id'),
-      );
+        '#parents' => ['form_id'],
+      ];
     }
     if (!isset($form['#id'])) {
       $form['#id'] = Html::getUniqueId($form_id);
@@ -793,7 +793,7 @@ public function prepareForm($form_id, &$form, FormStateInterface &$form_state) {
     }
 
     $form += $this->elementInfo->getInfo('form');
-    $form += array('#tree' => FALSE, '#parents' => array());
+    $form += ['#tree' => FALSE, '#parents' => []];
     $form['#validate'][] = '::validateForm';
     $form['#submit'][] = '::submitForm';
 
@@ -803,7 +803,7 @@ public function prepareForm($form_id, &$form, FormStateInterface &$form_state) {
     // is in #theme_wrappers. Therefore, the #theme function only has to care
     // for rendering the inner form elements, not the form itself.
     if (!isset($form['#theme'])) {
-      $form['#theme'] = array($form_id);
+      $form['#theme'] = [$form_id];
       if (isset($build_info['base_form_id'])) {
         $form['#theme'][] = $build_info['base_form_id'];
       }
@@ -811,7 +811,7 @@ public function prepareForm($form_id, &$form, FormStateInterface &$form_state) {
 
     // Invoke hook_form_alter(), hook_form_BASE_FORM_ID_alter(), and
     // hook_form_FORM_ID_alter() implementations.
-    $hooks = array('form');
+    $hooks = ['form'];
     if (isset($build_info['base_form_id'])) {
       $hooks[] = 'form_' . $build_info['base_form_id'];
     }
@@ -901,13 +901,13 @@ public function doBuildForm($form_id, &$element, FormStateInterface &$form_state
       $element['#defaults_loaded'] = TRUE;
     }
     // Assign basic defaults common for all form elements.
-    $element += array(
+    $element += [
       '#required' => FALSE,
-      '#attributes' => array(),
+      '#attributes' => [],
       '#title_display' => 'before',
       '#description_display' => 'after',
       '#errors' => NULL,
-    );
+    ];
 
     // Special handling if we're on the top level form element.
     if (isset($element['#type']) && $element['#type'] == 'form') {
@@ -949,7 +949,7 @@ public function doBuildForm($form_id, &$element, FormStateInterface &$form_state
       }
 
       // All form elements should have an #array_parents property.
-      $element['#array_parents'] = array();
+      $element['#array_parents'] = [];
     }
 
     if (!isset($element['#id'])) {
@@ -979,7 +979,7 @@ public function doBuildForm($form_id, &$element, FormStateInterface &$form_state
     if (isset($element['#process']) && !$element['#processed']) {
       foreach ($element['#process'] as $callback) {
         $complete_form = &$form_state->getCompleteForm();
-        $element = call_user_func_array($form_state->prepareCallback($callback), array(&$element, &$form_state, &$complete_form));
+        $element = call_user_func_array($form_state->prepareCallback($callback), [&$element, &$form_state, &$complete_form]);
       }
       $element['#processed'] = TRUE;
     }
@@ -1016,7 +1016,7 @@ public function doBuildForm($form_id, &$element, FormStateInterface &$form_state
 
       // Make child elements inherit their parent's #disabled and #allow_focus
       // values unless they specify their own.
-      foreach (array('#disabled', '#allow_focus') as $property) {
+      foreach (['#disabled', '#allow_focus'] as $property) {
         if (isset($element[$property]) && !isset($element[$key][$property])) {
           $element[$key][$property] = $element[$property];
         }
@@ -1026,7 +1026,7 @@ public function doBuildForm($form_id, &$element, FormStateInterface &$form_state
       if (!isset($element[$key]['#parents'])) {
         // Check to see if a tree of child elements is present. If so,
         // continue down the tree if required.
-        $element[$key]['#parents'] = $element[$key]['#tree'] && $element['#tree'] ? array_merge($element['#parents'], array($key)) : array($key);
+        $element[$key]['#parents'] = $element[$key]['#tree'] && $element['#tree'] ? array_merge($element['#parents'], [$key]) : [$key];
       }
       // Ensure #array_parents follows the actual form structure.
       $array_parents = $element['#array_parents'];
@@ -1050,7 +1050,7 @@ public function doBuildForm($form_id, &$element, FormStateInterface &$form_state
     // after normal input parsing has been completed.
     if (isset($element['#after_build']) && !isset($element['#after_build_done'])) {
       foreach ($element['#after_build'] as $callback) {
-        $element = call_user_func_array($form_state->prepareCallback($callback), array($element, &$form_state));
+        $element = call_user_func_array($form_state->prepareCallback($callback), [$element, &$form_state]);
       }
       $element['#after_build_done'] = TRUE;
     }
@@ -1236,7 +1236,7 @@ protected function handleInputElement($form_id, &$element, FormStateInterface &$
           // Skip all value callbacks except safe ones like text if the CSRF
           // token was invalid.
           if (!$form_state->hasInvalidToken() || $this->valueCallableIsSafe($value_callable)) {
-            $element['#value'] = call_user_func_array($value_callable, array(&$element, $input, &$form_state));
+            $element['#value'] = call_user_func_array($value_callable, [&$element, $input, &$form_state]);
           }
           else {
             $input = NULL;
@@ -1255,7 +1255,7 @@ protected function handleInputElement($form_id, &$element, FormStateInterface &$
       if (!isset($element['#value'])) {
         // Call #type_value without a second argument to request default_value
         // handling.
-        $element['#value'] = call_user_func_array($value_callable, array(&$element, FALSE, &$form_state));
+        $element['#value'] = call_user_func_array($value_callable, [&$element, FALSE, &$form_state]);
 
         // Final catch. If we haven't set a value yet, use the explicit default
         // value. Avoid image buttons (which come with garbage value), so we
diff --git a/core/lib/Drupal/Core/Form/FormCache.php b/core/lib/Drupal/Core/Form/FormCache.php
index 13e54303235242100947bc23efbf194aeaebf667..7064e10fb95dd551300e8185ca56232b9b4e5db5 100644
--- a/core/lib/Drupal/Core/Form/FormCache.php
+++ b/core/lib/Drupal/Core/Form/FormCache.php
@@ -156,7 +156,7 @@ protected function loadCachedFormState($form_build_id, FormStateInterface $form_
       $build_info += ['files' => []];
       foreach ($build_info['files'] as $file) {
         if (is_array($file)) {
-          $file += array('type' => 'inc', 'name' => $file['module']);
+          $file += ['type' => 'inc', 'name' => $file['module']];
           $this->moduleHandler->loadInclude($file['module'], $file['type'], $file['name']);
         }
         elseif (file_exists($file)) {
diff --git a/core/lib/Drupal/Core/Form/FormState.php b/core/lib/Drupal/Core/Form/FormState.php
index 33ca1fafba0668d115ee0aad85dbbea11d44dc9d..b78efb30d107df5fbbf1af2efb25a3fe0f54ff23 100644
--- a/core/lib/Drupal/Core/Form/FormState.php
+++ b/core/lib/Drupal/Core/Form/FormState.php
@@ -63,10 +63,10 @@ class FormState implements FormStateInterface {
    *
    * @var array
    */
-  protected $build_info = array(
-    'args' => array(),
-    'files' => array(),
-  );
+  protected $build_info = [
+    'args' => [],
+    'files' => [],
+  ];
 
   /**
    * Similar to self::$build_info, but pertaining to
@@ -76,7 +76,7 @@ class FormState implements FormStateInterface {
    *
    * @var array
    */
-  protected $rebuild_info = array();
+  protected $rebuild_info = [];
 
   /**
    * Normally, after the entire form processing is completed and submit handlers
@@ -216,7 +216,7 @@ class FormState implements FormStateInterface {
    *
    * @var array
    */
-  protected $values = array();
+  protected $values = [];
 
   /**
    * An associative array of form value keys to be removed by cleanValues().
@@ -348,7 +348,7 @@ class FormState implements FormStateInterface {
    *
    * @var array
    */
-  protected $groups = array();
+  protected $groups = [];
 
   /**
    * This is not a special key, and no specific support is provided for it in
@@ -368,7 +368,7 @@ class FormState implements FormStateInterface {
    *
    * @var array
    */
-  protected $storage = array();
+  protected $storage = [];
 
   /**
    * A list containing copies of all submit and button elements in the form.
@@ -377,7 +377,7 @@ class FormState implements FormStateInterface {
    *
    * @var array
    */
-  protected $buttons = array();
+  protected $buttons = [];
 
   /**
    * Holds temporary data accessible during the current page request only.
@@ -413,7 +413,7 @@ class FormState implements FormStateInterface {
    *
    * @var array
    */
-  protected $errors = array();
+  protected $errors = [];
 
   /**
    * Stores which errors should be limited during validation.
@@ -618,7 +618,7 @@ public function setRequestMethod($method) {
    * @see \Symfony\Component\HttpFoundation\Request::isMethodSafe()
    */
   protected function isRequestMethodSafe() {
-    return in_array($this->requestMethod, array('GET', 'HEAD'));
+    return in_array($this->requestMethod, ['GET', 'HEAD']);
   }
 
   /**
@@ -862,11 +862,11 @@ public function loadInclude($module, $type, $name = NULL) {
     if (!isset($build_info['files']["$module:$name.$type"])) {
       // Only add successfully included files to the form state.
       if ($result = $this->moduleLoadInclude($module, $type, $name)) {
-        $build_info['files']["$module:$name.$type"] = array(
+        $build_info['files']["$module:$name.$type"] = [
           'type' => $type,
           'module' => $module,
           'name' => $name,
-        );
+        ];
         $this->setBuildInfo($build_info);
         return $result;
       }
@@ -998,7 +998,7 @@ public function getResponse() {
   /**
    * {@inheritdoc}
    */
-  public function setRedirect($route_name, array $route_parameters = array(), array $options = array()) {
+  public function setRedirect($route_name, array $route_parameters = [], array $options = []) {
     $url = new Url($route_name, $route_parameters, $options);
     return $this->setRedirectUrl($url);
   }
@@ -1108,7 +1108,7 @@ public function clearErrors() {
    */
   public function getError(array $element) {
     if ($errors = $this->getErrors()) {
-      $parents = array();
+      $parents = [];
       foreach ($element['#parents'] as $parent) {
         $parents[] = $parent;
         $key = implode('][', $parents);
diff --git a/core/lib/Drupal/Core/Form/FormStateInterface.php b/core/lib/Drupal/Core/Form/FormStateInterface.php
index b1e3f3bc02e1a77c47cf000ced8a85985f0f8519..43b2d8ebf68dae343a8520345570766224a1125f 100644
--- a/core/lib/Drupal/Core/Form/FormStateInterface.php
+++ b/core/lib/Drupal/Core/Form/FormStateInterface.php
@@ -129,7 +129,7 @@ public function getResponse();
    *
    * @see \Drupal\Core\Form\FormSubmitterInterface::redirectForm()
    */
-  public function setRedirect($route_name, array $route_parameters = array(), array $options = array());
+  public function setRedirect($route_name, array $route_parameters = [], array $options = []);
 
   /**
    * Sets the redirect URL for the form.
diff --git a/core/lib/Drupal/Core/Form/FormSubmitter.php b/core/lib/Drupal/Core/Form/FormSubmitter.php
index a467924feca5795b132ffb2e6fe0d974729e88f9..4a4275ef8d0e4a79278e370e5befab87edb83a80 100644
--- a/core/lib/Drupal/Core/Form/FormSubmitter.php
+++ b/core/lib/Drupal/Core/Form/FormSubmitter.php
@@ -104,11 +104,11 @@ public function executeSubmitHandlers(&$form, FormStateInterface &$form_state) {
         // Some previous submit handler has set a batch. To ensure correct
         // execution order, store the call in a special 'control' batch set.
         // See _batch_next_set().
-        $batch['sets'][] = array('form_submit' => $callback);
+        $batch['sets'][] = ['form_submit' => $callback];
         $batch['has_form_submits'] = TRUE;
       }
       else {
-        call_user_func_array($form_state->prepareCallback($callback), array(&$form, &$form_state));
+        call_user_func_array($form_state->prepareCallback($callback), [&$form, &$form_state]);
       }
     }
   }
diff --git a/core/lib/Drupal/Core/Form/FormValidator.php b/core/lib/Drupal/Core/Form/FormValidator.php
index d4f3ee564014182499ac7e06c125fe32c281d754..8e976f5a86060ab79324c7f4d5969914b2564579 100644
--- a/core/lib/Drupal/Core/Form/FormValidator.php
+++ b/core/lib/Drupal/Core/Form/FormValidator.php
@@ -80,7 +80,7 @@ public function executeValidateHandlers(&$form, FormStateInterface &$form_state)
     }
 
     foreach ($handlers as $callback) {
-      call_user_func_array($form_state->prepareCallback($callback), array(&$form, &$form_state));
+      call_user_func_array($form_state->prepareCallback($callback), [&$form, &$form_state]);
     }
   }
 
@@ -128,7 +128,7 @@ public function setInvalidTokenError(FormStateInterface $form_state) {
     $url = $this->requestStack->getCurrentRequest()->getRequestUri();
 
     // Setting this error will cause the form to fail validation.
-    $form_state->setErrorByName('form_token', $this->t('The form has become outdated. Copy any unsaved work in the form below and then <a href=":link">reload this page</a>.', array(':link' => $url)));
+    $form_state->setErrorByName('form_token', $this->t('The form has become outdated. Copy any unsaved work in the form below and then <a href=":link">reload this page</a>.', [':link' => $url]));
   }
 
   /**
@@ -149,7 +149,7 @@ protected function handleErrorsWithLimitedValidation(&$form, FormStateInterface
     // so that only values that passed validation are left for submit callbacks.
     $triggering_element = $form_state->getTriggeringElement();
     if (isset($triggering_element['#limit_validation_errors']) && $triggering_element['#limit_validation_errors'] !== FALSE) {
-      $values = array();
+      $values = [];
       foreach ($triggering_element['#limit_validation_errors'] as $section) {
         // If the section exists within $form_state->getValues(), even if the
         // value is NULL, copy it to $values.
@@ -278,7 +278,7 @@ protected function doValidateForm(&$elements, FormStateInterface &$form_state, $
       elseif (isset($elements['#element_validate'])) {
         foreach ($elements['#element_validate'] as $callback) {
           $complete_form = &$form_state->getCompleteForm();
-          call_user_func_array($form_state->prepareCallback($callback), array(&$elements, &$form_state, &$complete_form));
+          call_user_func_array($form_state->prepareCallback($callback), [&$elements, &$form_state, &$complete_form]);
         }
       }
 
@@ -295,7 +295,7 @@ protected function doValidateForm(&$elements, FormStateInterface &$form_state, $
         // form constructors are encouraged to set #title anyway, and then set
         // #title_display to 'invisible'. This improves accessibility.
         elseif (isset($elements['#title'])) {
-          $form_state->setError($elements, $this->t('@name field is required.', array('@name' => $elements['#title'])));
+          $form_state->setError($elements, $this->t('@name field is required.', ['@name' => $elements['#title']]));
         }
         else {
           $form_state->setError($elements);
@@ -330,7 +330,7 @@ protected function doValidateForm(&$elements, FormStateInterface &$form_state, $
   protected function performRequiredValidation(&$elements, FormStateInterface &$form_state) {
     // Verify that the value is not longer than #maxlength.
     if (isset($elements['#maxlength']) && Unicode::strlen($elements['#value']) > $elements['#maxlength']) {
-      $form_state->setError($elements, $this->t('@name cannot be longer than %max characters but is currently %length characters long.', array('@name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'], '%max' => $elements['#maxlength'], '%length' => Unicode::strlen($elements['#value']))));
+      $form_state->setError($elements, $this->t('@name cannot be longer than %max characters but is currently %length characters long.', ['@name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'], '%max' => $elements['#maxlength'], '%length' => Unicode::strlen($elements['#value'])]));
     }
 
     if (isset($elements['#options']) && isset($elements['#value'])) {
@@ -341,11 +341,11 @@ protected function performRequiredValidation(&$elements, FormStateInterface &$fo
         $options = $elements['#options'];
       }
       if (is_array($elements['#value'])) {
-        $value = in_array($elements['#type'], array('checkboxes', 'tableselect')) ? array_keys($elements['#value']) : $elements['#value'];
+        $value = in_array($elements['#type'], ['checkboxes', 'tableselect']) ? array_keys($elements['#value']) : $elements['#value'];
         foreach ($value as $v) {
           if (!isset($options[$v])) {
             $form_state->setError($elements, $this->t('An illegal choice has been detected. Please contact the site administrator.'));
-            $this->logger->error('Illegal choice %choice in %name element.', array('%choice' => $v, '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']));
+            $this->logger->error('Illegal choice %choice in %name element.', ['%choice' => $v, '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']]);
           }
         }
       }
@@ -364,7 +364,7 @@ protected function performRequiredValidation(&$elements, FormStateInterface &$fo
       }
       elseif (!isset($options[$elements['#value']])) {
         $form_state->setError($elements, $this->t('An illegal choice has been detected. Please contact the site administrator.'));
-        $this->logger->error('Illegal choice %choice in %name element.', array('%choice' => $elements['#value'], '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']));
+        $this->logger->error('Illegal choice %choice in %name element.', ['%choice' => $elements['#value'], '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']]);
       }
     }
   }
@@ -402,7 +402,7 @@ protected function determineLimitValidationErrors(FormStateInterface &$form_stat
     // types, #limit_validation_errors defaults to FALSE, so that full
     // validation is their default behavior.
     elseif ($triggering_element && !isset($triggering_element['#limit_validation_errors']) && !$form_state->isSubmitted()) {
-      return array();
+      return [];
     }
     // As an extra security measure, explicitly turn off error suppression if
     // one of the above conditions wasn't met. Since this is also done at the
diff --git a/core/lib/Drupal/Core/Form/OptGroup.php b/core/lib/Drupal/Core/Form/OptGroup.php
index ac4e5fb0af06c544c4defe56788044240d3ebe64..2ba28bde9cc182661e3cdea5b4c17c242a61e8ca 100644
--- a/core/lib/Drupal/Core/Form/OptGroup.php
+++ b/core/lib/Drupal/Core/Form/OptGroup.php
@@ -21,7 +21,7 @@ class OptGroup {
    *   An array with all hierarchical elements flattened to a single array.
    */
   public static function flattenOptions(array $array) {
-    $options = array();
+    $options = [];
     static::doFlattenOptions($array, $options);
     return $options;
   }
diff --git a/core/lib/Drupal/Core/Form/form.api.php b/core/lib/Drupal/Core/Form/form.api.php
index 701871f9299300840321391d08f39002d9eae264..fcf9c2eeb5f0add520080011104498094b373992 100644
--- a/core/lib/Drupal/Core/Form/form.api.php
+++ b/core/lib/Drupal/Core/Form/form.api.php
@@ -73,7 +73,7 @@ function callback_batch_operation($MULTIPLE_PARAMS, &$context) {
   foreach ($result as $row) {
 
     // Here we actually perform our processing on the current node.
-    $node_storage->resetCache(array($row['nid']));
+    $node_storage->resetCache([$row['nid']]);
     $node = $node_storage->load($row['nid']);
     $node->value1 = $options1;
     $node->value2 = $options2;
@@ -85,7 +85,7 @@ function callback_batch_operation($MULTIPLE_PARAMS, &$context) {
     // Update our progress information.
     $context['sandbox']['progress']++;
     $context['sandbox']['current_node'] = $node->nid;
-    $context['message'] = t('Now processing %node', array('%node' => $node->title));
+    $context['message'] = t('Now processing %node', ['%node' => $node->title]);
   }
 
   // Inform the batch engine that we are not finished,
@@ -113,13 +113,13 @@ function callback_batch_operation($MULTIPLE_PARAMS, &$context) {
 function callback_batch_finished($success, $results, $operations) {
   if ($success) {
     // Here we do something meaningful with the results.
-    $message = t("@count items were processed.", array(
+    $message = t("@count items were processed.", [
       '@count' => count($results),
-      ));
-    $list = array(
+      ]);
+    $list = [
       '#theme' => 'item_list',
       '#items' => $results,
-    );
+    ];
     $message .= drupal_render($list);
     drupal_set_message($message);
   }
@@ -127,10 +127,10 @@ function callback_batch_finished($success, $results, $operations) {
     // An error occurred.
     // $operations contains the operations that remained unprocessed.
     $error_operation = reset($operations);
-    $message = t('An error occurred while processing %error_operation with arguments: @arguments', array(
+    $message = t('An error occurred while processing %error_operation with arguments: @arguments', [
       '%error_operation' => $error_operation[0],
       '@arguments' => print_r($error_operation[1], TRUE)
-    ));
+    ]);
     drupal_set_message($message, 'error');
   }
 }
@@ -152,7 +152,7 @@ function callback_batch_finished($success, $results, $operations) {
  */
 function hook_ajax_render_alter(array &$data) {
   // Inject any new status messages into the content area.
-  $status_messages = array('#type' => 'status_messages');
+  $status_messages = ['#type' => 'status_messages'];
   $command = new \Drupal\Core\Ajax\PrependCommand('#block-system-main .content', \Drupal::service('renderer')->renderRoot($status_messages));
   $data[] = $command->render();
 }
@@ -201,12 +201,12 @@ function hook_ajax_render_alter(array &$data) {
 function hook_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
   if (isset($form['type']) && $form['type']['#value'] . '_node_settings' == $form_id) {
     $upload_enabled_types = \Drupal::config('mymodule.settings')->get('upload_enabled_types');
-    $form['workflow']['upload_' . $form['type']['#value']] = array(
+    $form['workflow']['upload_' . $form['type']['#value']] = [
       '#type' => 'radios',
       '#title' => t('Attachments'),
       '#default_value' => in_array($form['type']['#value'], $upload_enabled_types) ? 1 : 0,
-      '#options' => array(t('Disabled'), t('Enabled')),
-    );
+      '#options' => [t('Disabled'), t('Enabled')],
+    ];
     // Add a custom submit handler to save the array of types back to the config file.
     $form['actions']['submit']['#submit'][] = 'mymodule_upload_enabled_types_submit';
   }
@@ -248,11 +248,11 @@ function hook_form_FORM_ID_alter(&$form, \Drupal\Core\Form\FormStateInterface $f
   // registration form.
 
   // Add a checkbox to registration form about agreeing to terms of use.
-  $form['terms_of_use'] = array(
+  $form['terms_of_use'] = [
     '#type' => 'checkbox',
     '#title' => t("I agree with the website's terms and conditions."),
     '#required' => TRUE,
-  );
+  ];
 }
 
 /**
@@ -298,11 +298,11 @@ function hook_form_BASE_FORM_ID_alter(&$form, \Drupal\Core\Form\FormStateInterfa
   // node form, regardless of node type.
 
   // Add a checkbox to the node form about agreeing to terms of use.
-  $form['terms_of_use'] = array(
+  $form['terms_of_use'] = [
     '#type' => 'checkbox',
     '#title' => t("I agree with the website's terms and conditions."),
     '#required' => TRUE,
-  );
+  ];
 }
 
 /**
diff --git a/core/lib/Drupal/Core/Http/TrustedHostsRequestFactory.php b/core/lib/Drupal/Core/Http/TrustedHostsRequestFactory.php
index 59751c06bfdd1e75098a160f9ea6ac396d8cebf6..3aa0490f4fe3ac22f9b0f89ef66790e41289786f 100644
--- a/core/lib/Drupal/Core/Http/TrustedHostsRequestFactory.php
+++ b/core/lib/Drupal/Core/Http/TrustedHostsRequestFactory.php
@@ -57,7 +57,7 @@ public function __construct($host) {
    * @return \Symfony\Component\HttpFoundation\Request
    *   A new request object.
    */
-  public function createRequest(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = NULL) {
+  public function createRequest(array $query = [], array $request = [], array $attributes = [], array $cookies = [], array $files = [], array $server = [], $content = NULL) {
     if (empty($server['HTTP_HOST']) || ($server['HTTP_HOST'] === 'localhost' && $this->host !== 'localhost')) {
       $server['HTTP_HOST'] = $this->host;
     }
diff --git a/core/lib/Drupal/Core/Image/Image.php b/core/lib/Drupal/Core/Image/Image.php
index 42cdc92f811d20e60a423616ac5a6c2aa1fe8d80..e4c787632f5b10311f3c5696dc6697b6c7e38162 100644
--- a/core/lib/Drupal/Core/Image/Image.php
+++ b/core/lib/Drupal/Core/Image/Image.php
@@ -139,7 +139,7 @@ public function save($destination = NULL) {
   /**
    * {@inheritdoc}
    */
-  public function apply($operation, array $arguments = array()) {
+  public function apply($operation, array $arguments = []) {
     return $this->getToolkit()->apply($operation, $arguments);
   }
 
@@ -147,56 +147,56 @@ public function apply($operation, array $arguments = array()) {
    * {@inheritdoc}
    */
   public function createNew($width, $height, $extension = 'png', $transparent_color = '#ffffff') {
-    return $this->apply('create_new', array('width' => $width, 'height' => $height, 'extension' => $extension, 'transparent_color' => $transparent_color));
+    return $this->apply('create_new', ['width' => $width, 'height' => $height, 'extension' => $extension, 'transparent_color' => $transparent_color]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function convert($extension) {
-    return $this->apply('convert', array('extension' => $extension));
+    return $this->apply('convert', ['extension' => $extension]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function crop($x, $y, $width, $height = NULL) {
-    return $this->apply('crop', array('x' => $x, 'y' => $y, 'width' => $width, 'height' => $height));
+    return $this->apply('crop', ['x' => $x, 'y' => $y, 'width' => $width, 'height' => $height]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function desaturate() {
-    return $this->apply('desaturate', array());
+    return $this->apply('desaturate', []);
   }
 
   /**
    * {@inheritdoc}
    */
   public function resize($width, $height) {
-    return $this->apply('resize', array('width' => $width, 'height' => $height));
+    return $this->apply('resize', ['width' => $width, 'height' => $height]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function rotate($degrees, $background = NULL) {
-    return $this->apply('rotate', array('degrees' => $degrees, 'background' => $background));
+    return $this->apply('rotate', ['degrees' => $degrees, 'background' => $background]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function scaleAndCrop($width, $height) {
-    return $this->apply('scale_and_crop', array('width' => $width, 'height' => $height));
+    return $this->apply('scale_and_crop', ['width' => $width, 'height' => $height]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function scale($width, $height = NULL, $upscale = FALSE) {
-    return $this->apply('scale', array('width' => $width, 'height' => $height, 'upscale' => $upscale));
+    return $this->apply('scale', ['width' => $width, 'height' => $height, 'upscale' => $upscale]);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Image/ImageInterface.php b/core/lib/Drupal/Core/Image/ImageInterface.php
index 9e112c67ea1f5ac8cdf9a604e7cef15a9d1725f6..29d092a7368ee54a4b89acc14b1a232d529aec94 100644
--- a/core/lib/Drupal/Core/Image/ImageInterface.php
+++ b/core/lib/Drupal/Core/Image/ImageInterface.php
@@ -91,7 +91,7 @@ public function getToolkitId();
    * @return bool
    *   TRUE on success, FALSE on failure.
    */
-  public function apply($operation, array $arguments = array());
+  public function apply($operation, array $arguments = []);
 
   /**
    * Closes the image and saves the changes to a file.
diff --git a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitBase.php b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitBase.php
index 0c7eb7dff9b369ade4d9996c49628df410ca6449..72f3d29256d06dc4b90591ec1e627a9290526dd5 100644
--- a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitBase.php
+++ b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitBase.php
@@ -100,7 +100,7 @@ public function getSource() {
    * {@inheritdoc}
    */
   public function getRequirements() {
-    return array();
+    return [];
   }
 
   /**
@@ -119,17 +119,17 @@ protected function getToolkitOperation($operation) {
   /**
    * {@inheritdoc}
    */
-  public function apply($operation, array $arguments = array()) {
+  public function apply($operation, array $arguments = []) {
     try {
       // Get the plugin to use for the operation and apply the operation.
       return $this->getToolkitOperation($operation)->apply($arguments);
     }
     catch (PluginNotFoundException $e) {
-      $this->logger->error("The selected image handling toolkit '@toolkit' can not process operation '@operation'.", array('@toolkit' => $this->getPluginId(), '@operation' => $operation));
+      $this->logger->error("The selected image handling toolkit '@toolkit' can not process operation '@operation'.", ['@toolkit' => $this->getPluginId(), '@operation' => $operation]);
       return FALSE;
     }
     catch (\InvalidArgumentException $e) {
-      $this->logger->warning($e->getMessage(), array());
+      $this->logger->warning($e->getMessage(), []);
       return FALSE;
     }
   }
diff --git a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitInterface.php b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitInterface.php
index f84131529feeffec4b8aece8822904f62c6590cf..51867f4c3ff3b4bd426b184ff099f4c6592669cf 100644
--- a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitInterface.php
+++ b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitInterface.php
@@ -169,6 +169,6 @@ public static function getSupportedExtensions();
    * @return bool
    *   TRUE if the operation was performed successfully, FALSE otherwise.
    */
-  public function apply($operation, array $arguments = array());
+  public function apply($operation, array $arguments = []);
 
 }
diff --git a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitManager.php b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitManager.php
index 1c63807c7b6aedf2292460b02168887e627d9471..d53364704fedaaaa7162b1336b27a42c0817aa09 100644
--- a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitManager.php
+++ b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitManager.php
@@ -87,7 +87,7 @@ public function getAvailableToolkits() {
     // Use plugin system to get list of available toolkits.
     $toolkits = $this->getDefinitions();
 
-    $output = array();
+    $output = [];
     foreach ($toolkits as $id => $definition) {
       // Only allow modules that aren't marked as unavailable.
       if (call_user_func($definition['class'] . '::isAvailable')) {
diff --git a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationBase.php b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationBase.php
index 2a1e61ec30e03031e4785645876ea8cc754aedaf..c9a93ffe4d3ca8f792b520025f3c438f790c6d2c 100644
--- a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationBase.php
+++ b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationBase.php
@@ -103,7 +103,7 @@ abstract protected function arguments();
    */
   protected function prepareArguments(array $arguments) {
     foreach ($this->arguments() as $id => $argument) {
-      $argument += array('required' => TRUE);
+      $argument += ['required' => TRUE];
       // Check if the argument is required and, if so, has been provided.
       if ($argument['required']) {
         if (!array_key_exists($id, $arguments)) {
diff --git a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationManager.php b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationManager.php
index b3a3e75712900eb120f1d916b7be9686f9867a6b..5fc434ca1e39ac5fd9afe814a34aff3576912470 100644
--- a/core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationManager.php
+++ b/core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationManager.php
@@ -91,7 +91,7 @@ function ($definition) use ($toolkit_id, $operation) {
         return $this->getToolkitOperationPluginId($base_toolkit, $operation);
       }
 
-      $message = SafeMarkup::format("No image operation plugin for '@toolkit' toolkit and '@operation' operation.", array('@toolkit' => $toolkit_id, '@operation' => $operation));
+      $message = SafeMarkup::format("No image operation plugin for '@toolkit' toolkit and '@operation' operation.", ['@toolkit' => $toolkit_id, '@operation' => $operation]);
       throw new PluginNotFoundException($toolkit_id . '.' . $operation, $message);
     }
     else {
@@ -106,7 +106,7 @@ function ($definition) use ($toolkit_id, $operation) {
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array(), ImageToolkitInterface $toolkit = NULL) {
+  public function createInstance($plugin_id, array $configuration = [], ImageToolkitInterface $toolkit = NULL) {
     $plugin_definition = $this->getDefinition($plugin_id);
     $plugin_class = DefaultFactory::getPluginClass($plugin_id, $plugin_definition);
     return new $plugin_class($configuration, $plugin_id, $plugin_definition, $toolkit, $this->logger);
@@ -117,7 +117,7 @@ public function createInstance($plugin_id, array $configuration = array(), Image
    */
   public function getToolkitOperation(ImageToolkitInterface $toolkit, $operation) {
     $plugin_id = $this->getToolkitOperationPluginId($toolkit, $operation);
-    return $this->createInstance($plugin_id, array(), $toolkit);
+    return $this->createInstance($plugin_id, [], $toolkit);
   }
 
 }
diff --git a/core/lib/Drupal/Core/Installer/Exception/AlreadyInstalledException.php b/core/lib/Drupal/Core/Installer/Exception/AlreadyInstalledException.php
index ed0cfac98446c67c983da63baaf3f92d18c0bb39..ca00d0be81f74e520226b26c38496a12a36328b2 100644
--- a/core/lib/Drupal/Core/Installer/Exception/AlreadyInstalledException.php
+++ b/core/lib/Drupal/Core/Installer/Exception/AlreadyInstalledException.php
@@ -23,10 +23,10 @@ public function __construct(TranslationInterface $string_translation) {
 <li>To start over, you must empty your existing database and copy <em>default.settings.php</em> over <em>settings.php</em>.</li>
 <li>To upgrade an existing installation, proceed to the <a href=":update-url">update script</a>.</li>
 <li>View your <a href=":base-url">existing site</a>.</li>
-</ul>', array(
+</ul>', [
       ':base-url' => $GLOBALS['base_url'],
       ':update-url' => $GLOBALS['base_path'] . 'update.php',
-    ));
+    ]);
     parent::__construct($message, $title);
   }
 
diff --git a/core/lib/Drupal/Core/Installer/Form/SelectLanguageForm.php b/core/lib/Drupal/Core/Installer/Form/SelectLanguageForm.php
index 9342f5cf740c994ca73f5c41e1350a477e2ea6f8..686b1a2c34371fe0a941df5ca42b49a9770c8aff 100644
--- a/core/lib/Drupal/Core/Installer/Form/SelectLanguageForm.php
+++ b/core/lib/Drupal/Core/Installer/Form/SelectLanguageForm.php
@@ -31,11 +31,11 @@ public function buildForm(array $form, FormStateInterface $form_state, $install_
       $files = $install_state['translations'];
     }
     else {
-      $files = array();
+      $files = [];
     }
     $standard_languages = LanguageManager::getStandardLanguageList();
-    $select_options = array();
-    $browser_options = array();
+    $select_options = [];
+    $browser_options = [];
 
     $form['#title'] = 'Choose language';
 
@@ -57,32 +57,32 @@ public function buildForm(array $form, FormStateInterface $form_state, $install_
     asort($select_options);
     $request = Request::createFromGlobals();
     $browser_langcode = UserAgent::getBestMatchingLangcode($request->server->get('HTTP_ACCEPT_LANGUAGE'), $browser_options);
-    $form['langcode'] = array(
+    $form['langcode'] = [
       '#type' => 'select',
       '#title' => 'Choose language',
       '#title_display' => 'invisible',
       '#options' => $select_options,
       // Use the browser detected language as default or English if nothing found.
       '#default_value' => !empty($browser_langcode) ? $browser_langcode : 'en',
-    );
-    $link_to_english = install_full_redirect_url(array('parameters' => array('langcode' => 'en')));
-    $form['help'] = array(
+    ];
+    $link_to_english = install_full_redirect_url(['parameters' => ['langcode' => 'en']]);
+    $form['help'] = [
       '#type' => 'item',
       // #markup is XSS admin filtered which ensures unsafe protocols will be
       // removed from the url.
       '#markup' => '<p>Translations will be downloaded from the <a href="http://localize.drupal.org">Drupal Translation website</a>. If you do not want this, select <a href="' . $link_to_english . '">English</a>.</p>',
-      '#states' => array(
-        'invisible' => array(
-          'select[name="langcode"]' => array('value' => 'en'),
-        ),
-      ),
-    );
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+      '#states' => [
+        'invisible' => [
+          'select[name="langcode"]' => ['value' => 'en'],
+        ],
+      ],
+    ];
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save and continue',
       '#button_type' => 'primary',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/lib/Drupal/Core/Installer/Form/SelectProfileForm.php b/core/lib/Drupal/Core/Installer/Form/SelectProfileForm.php
index 7ccdf2759f92f4cb3c8118624cc7d7b6f86f8530..679e6db00b2ff18895c2b2a8814870091ca6c1e9 100644
--- a/core/lib/Drupal/Core/Installer/Form/SelectProfileForm.php
+++ b/core/lib/Drupal/Core/Installer/Form/SelectProfileForm.php
@@ -23,8 +23,8 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state, $install_state = NULL) {
     $form['#title'] = $this->t('Select an installation profile');
 
-    $profiles = array();
-    $names = array();
+    $profiles = [];
+    $names = [];
     foreach ($install_state['profiles'] as $profile) {
       /** @var $profile \Drupal\Core\Extension\Extension */
       $details = install_profile_info($profile->getName());
@@ -49,34 +49,34 @@ public function buildForm(array $form, FormStateInterface $form_state, $install_
       // any non-core profiles rather than including it with them alphabetically,
       // since the other profiles might be intended to group together in a
       // particular way.
-      $names = array('minimal' => $names['minimal']) + $names;
+      $names = ['minimal' => $names['minimal']] + $names;
     }
     if (isset($names['standard'])) {
       // If the default ("Standard") core profile is present, put it at the very
       // top of the list. This profile will have its radio button pre-selected,
       // so we want it to always appear at the top.
-      $names = array('standard' => $names['standard']) + $names;
+      $names = ['standard' => $names['standard']] + $names;
     }
 
     // The profile name and description are extracted for translation from the
     // .info file, so we can use $this->t() on them even though they are dynamic
     // data at this point.
-    $form['profile'] = array(
+    $form['profile'] = [
       '#type' => 'radios',
       '#title' => $this->t('Select an installation profile'),
       '#title_display' => 'invisible',
-      '#options' => array_map(array($this, 't'), $names),
+      '#options' => array_map([$this, 't'], $names),
       '#default_value' => 'standard',
-    );
+    ];
     foreach (array_keys($names) as $profile_name) {
       $form['profile'][$profile_name]['#description'] = isset($profiles[$profile_name]['description']) ? $this->t($profiles[$profile_name]['description']) : '';
     }
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save and continue'),
       '#button_type' => 'primary',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php b/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
index 8720b00a31769c7d4e21217b48ee27b9b1d969a2..c28b7f8fd4947fbb99452d05dbb205edafcbc083 100644
--- a/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
+++ b/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
@@ -132,7 +132,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // successfully.)
     $post_params = $this->getRequest()->request->all();
     if (empty($post_params) && (!drupal_verify_install_file($this->root . '/' . $settings_file, FILE_EXIST | FILE_READABLE | FILE_NOT_WRITABLE) || !drupal_verify_install_file($this->root . '/' . $settings_dir, FILE_NOT_WRITABLE, 'dir'))) {
-      drupal_set_message(t('All necessary changes to %dir and %file have been made, so you should remove write permissions to them now in order to avoid security risks. If you are unsure how to do so, consult the <a href=":handbook_url">online handbook</a>.', array('%dir' => $settings_dir, '%file' => $settings_file, ':handbook_url' => 'https://www.drupal.org/server-permissions')), 'warning');
+      drupal_set_message(t('All necessary changes to %dir and %file have been made, so you should remove write permissions to them now in order to avoid security risks. If you are unsure how to do so, consult the <a href=":handbook_url">online handbook</a>.', ['%dir' => $settings_dir, '%file' => $settings_file, ':handbook_url' => 'https://www.drupal.org/server-permissions']), 'warning');
     }
 
     $form['#attached']['library'][] = 'system/drupal.system';
@@ -142,55 +142,55 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // work during installation.
     $form['#attached']['drupalSettings']['copyFieldValue']['edit-site-mail'] = ['edit-account-mail'];
 
-    $form['site_information'] = array(
+    $form['site_information'] = [
       '#type' => 'fieldgroup',
       '#title' => $this->t('Site information'),
-    );
-    $form['site_information']['site_name'] = array(
+    ];
+    $form['site_information']['site_name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Site name'),
       '#required' => TRUE,
       '#weight' => -20,
-    );
-    $form['site_information']['site_mail'] = array(
+    ];
+    $form['site_information']['site_mail'] = [
       '#type' => 'email',
       '#title' => $this->t('Site email address'),
       '#default_value' => ini_get('sendmail_from'),
       '#description' => $this->t("Automated emails, such as registration information, will be sent from this address. Use an address ending in your site's domain to help prevent these emails from being flagged as spam."),
       '#required' => TRUE,
       '#weight' => -15,
-    );
+    ];
 
-    $form['admin_account'] = array(
+    $form['admin_account'] = [
       '#type' => 'fieldgroup',
       '#title' => $this->t('Site maintenance account'),
-    );
-    $form['admin_account']['account']['name'] = array(
+    ];
+    $form['admin_account']['account']['name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Username'),
       '#maxlength' => USERNAME_MAX_LENGTH,
       '#description' => $this->t("Several special characters are allowed, including space, period (.), hyphen (-), apostrophe ('), underscore (_), and the @ sign."),
       '#required' => TRUE,
-      '#attributes' => array('class' => array('username')),
-    );
-    $form['admin_account']['account']['pass'] = array(
+      '#attributes' => ['class' => ['username']],
+    ];
+    $form['admin_account']['account']['pass'] = [
       '#type' => 'password_confirm',
       '#required' => TRUE,
       '#size' => 25,
-    );
+    ];
     $form['admin_account']['account']['#tree'] = TRUE;
-    $form['admin_account']['account']['mail'] = array(
+    $form['admin_account']['account']['mail'] = [
       '#type' => 'email',
       '#title' => $this->t('Email address'),
       '#required' => TRUE,
-    );
+    ];
 
-    $form['regional_settings'] = array(
+    $form['regional_settings'] = [
       '#type' => 'fieldgroup',
       '#title' => $this->t('Regional settings'),
-    );
+    ];
     $countries = $this->countryManager->getList();
-    $form['regional_settings']['site_default_country'] = array(
+    $form['regional_settings']['site_default_country'] = [
       '#type' => 'select',
       '#title' => $this->t('Default country'),
       '#empty_value' => '',
@@ -198,8 +198,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#options' => $countries,
       '#description' => $this->t('Select the default country for the site.'),
       '#weight' => 0,
-    );
-    $form['regional_settings']['date_default_timezone'] = array(
+    ];
+    $form['regional_settings']['date_default_timezone'] = [
       '#type' => 'select',
       '#title' => $this->t('Default time zone'),
       // Use system timezone if set, but avoid throwing a warning in PHP >=5.4
@@ -207,37 +207,37 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#options' => system_time_zones(),
       '#description' => $this->t('By default, dates in this site will be displayed in the chosen time zone.'),
       '#weight' => 5,
-      '#attributes' => array('class' => array('timezone-detect')),
-    );
+      '#attributes' => ['class' => ['timezone-detect']],
+    ];
 
-    $form['update_notifications'] = array(
+    $form['update_notifications'] = [
       '#type' => 'fieldgroup',
       '#title' => $this->t('Update notifications'),
-      '#description' => $this->t('The system will notify you when updates and important security releases are available for installed components. Anonymous information about your site is sent to <a href=":drupal">Drupal.org</a>.', array(':drupal' => 'https://www.drupal.org')),
-    );
-    $form['update_notifications']['enable_update_status_module'] = array(
+      '#description' => $this->t('The system will notify you when updates and important security releases are available for installed components. Anonymous information about your site is sent to <a href=":drupal">Drupal.org</a>.', [':drupal' => 'https://www.drupal.org']),
+    ];
+    $form['update_notifications']['enable_update_status_module'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Check for updates automatically'),
       '#default_value' => 1,
-    );
-    $form['update_notifications']['enable_update_status_emails'] = array(
+    ];
+    $form['update_notifications']['enable_update_status_emails'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Receive email notifications'),
       '#default_value' => 1,
-      '#states' => array(
-        'visible' => array(
-          'input[name="enable_update_status_module"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          'input[name="enable_update_status_module"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save and continue'),
       '#weight' => 15,
       '#button_type' => 'primary',
-    );
+    ];
 
     return $form;
   }
@@ -246,7 +246,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function validateForm(array &$form, FormStateInterface $form_state) {
-    if ($error = user_validate_name($form_state->getValue(array('account', 'name')))) {
+    if ($error = user_validate_name($form_state->getValue(['account', 'name']))) {
       $form_state->setErrorByName('account][name', $error);
     }
   }
@@ -270,7 +270,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     // Enable update.module if this option was selected.
     $update_status_module = $form_state->getValue('enable_update_status_module');
     if ($update_status_module) {
-      $this->moduleInstaller->install(array('file', 'update'), FALSE);
+      $this->moduleInstaller->install(['file', 'update'], FALSE);
 
       // Add the site maintenance account's email address to the list of
       // addresses to be notified when updates are available, if selected.
@@ -278,7 +278,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       if ($email_update_status_emails) {
         // Reset the configuration factory so it is updated with the new module.
         $this->resetConfigFactory();
-        $this->config('update.settings')->set('notification.emails', array($account_values['mail']))->save(TRUE);
+        $this->config('update.settings')->set('notification.emails', [$account_values['mail']])->save(TRUE);
       }
     }
 
diff --git a/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php b/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
index f5d1c7fe5063a7bee4239b427bb37641ac90cb06..5442d1542ef6b76cb258b8f86140d3e8cce0191e 100644
--- a/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
+++ b/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
@@ -97,15 +97,15 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // when JavaScript is enabled (see below).
     else {
       $default_driver = current($drivers_keys);
-      $default_options = array();
+      $default_options = [];
     }
 
-    $form['driver'] = array(
+    $form['driver'] = [
       '#type' => 'radios',
       '#title' => $this->t('Database type'),
       '#required' => TRUE,
       '#default_value' => $default_driver,
-    );
+    ];
     if (count($drivers) == 1) {
       $form['driver']['#disabled'] = TRUE;
     }
@@ -115,31 +115,31 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       $form['driver']['#options'][$key] = $driver->name();
 
       $form['settings'][$key] = $driver->getFormOptions($default_options);
-      $form['settings'][$key]['#prefix'] = '<h2 class="js-hide">' . $this->t('@driver_name settings', array('@driver_name' => $driver->name())) . '</h2>';
+      $form['settings'][$key]['#prefix'] = '<h2 class="js-hide">' . $this->t('@driver_name settings', ['@driver_name' => $driver->name()]) . '</h2>';
       $form['settings'][$key]['#type'] = 'container';
       $form['settings'][$key]['#tree'] = TRUE;
-      $form['settings'][$key]['advanced_options']['#parents'] = array($key);
-      $form['settings'][$key]['#states'] = array(
-        'visible' => array(
-          ':input[name=driver]' => array('value' => $key),
-        )
-      );
+      $form['settings'][$key]['advanced_options']['#parents'] = [$key];
+      $form['settings'][$key]['#states'] = [
+        'visible' => [
+          ':input[name=driver]' => ['value' => $key],
+        ]
+      ];
     }
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['save'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['save'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save and continue'),
       '#button_type' => 'primary',
-      '#limit_validation_errors' => array(
-        array('driver'),
-        array($default_driver),
-      ),
-      '#submit' => array('::submitForm'),
-    );
+      '#limit_validation_errors' => [
+        ['driver'],
+        [$default_driver],
+      ],
+      '#submit' => ['::submitForm'],
+    ];
 
-    $form['errors'] = array();
-    $form['settings_file'] = array('#type' => 'value', '#value' => $settings_file);
+    $form['errors'] = [];
+    $form['settings_file'] = ['#type' => 'value', '#value' => $settings_file];
 
     return $form;
   }
@@ -213,21 +213,21 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     global $install_state;
 
     // Update global settings array and save.
-    $settings = array();
+    $settings = [];
     $database = $form_state->get('database');
-    $settings['databases']['default']['default'] = (object) array(
+    $settings['databases']['default']['default'] = (object) [
       'value'    => $database,
       'required' => TRUE,
-    );
-    $settings['settings']['hash_salt'] = (object) array(
+    ];
+    $settings['settings']['hash_salt'] = (object) [
       'value'    => Crypt::randomBytesBase64(55),
       'required' => TRUE,
-    );
+    ];
     // Remember the profile which was used.
-    $settings['settings']['install_profile'] = (object) array(
+    $settings['settings']['install_profile'] = (object) [
       'value' => $install_state['parameters']['profile'],
       'required' => TRUE,
-    );
+    ];
 
     drupal_rewrite_settings($settings);
 
diff --git a/core/lib/Drupal/Core/Installer/InstallerRouteBuilder.php b/core/lib/Drupal/Core/Installer/InstallerRouteBuilder.php
index c2ec5ede47277503cf254ad98187ca1a5fe84785..a432f2389c7fc02acf54a7d41bae431728bee3b1 100644
--- a/core/lib/Drupal/Core/Installer/InstallerRouteBuilder.php
+++ b/core/lib/Drupal/Core/Installer/InstallerRouteBuilder.php
@@ -17,7 +17,7 @@ class InstallerRouteBuilder extends RouteBuilder {
    * @todo Convert installer steps into routes; add an installer.routing.yml.
    */
   protected function getRouteDefinitions() {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Installer/InstallerServiceProvider.php b/core/lib/Drupal/Core/Installer/InstallerServiceProvider.php
index 1ace991de83c30fefb697d384005d277ec29d938..48341492bdbc767189b7f872560c137f145a86c1 100644
--- a/core/lib/Drupal/Core/Installer/InstallerServiceProvider.php
+++ b/core/lib/Drupal/Core/Installer/InstallerServiceProvider.php
@@ -28,8 +28,8 @@ public function register(ContainerBuilder $container) {
     // Replace services with in-memory implementations.
     $definition = $container->getDefinition('cache_factory');
     $definition->setClass('Drupal\Core\Cache\MemoryBackendFactory');
-    $definition->setArguments(array());
-    $definition->setMethodCalls(array());
+    $definition->setArguments([]);
+    $definition->setMethodCalls([]);
     $container
       ->register('keyvalue', 'Drupal\Core\KeyValueStore\KeyValueMemoryFactory');
     $container
diff --git a/core/lib/Drupal/Core/KeyValueStore/DatabaseStorage.php b/core/lib/Drupal/Core/KeyValueStore/DatabaseStorage.php
index aca4f31acda1fbaf00efb1a53be8cdc8919b6959..bd96df2f2088f7658507b458992ecf0e016abc24 100644
--- a/core/lib/Drupal/Core/KeyValueStore/DatabaseStorage.php
+++ b/core/lib/Drupal/Core/KeyValueStore/DatabaseStorage.php
@@ -61,19 +61,19 @@ public function __construct($collection, SerializationInterface $serializer, Con
    * {@inheritdoc}
    */
   public function has($key) {
-    return (bool) $this->connection->query('SELECT 1 FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name = :key', array(
+    return (bool) $this->connection->query('SELECT 1 FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name = :key', [
       ':collection' => $this->collection,
       ':key' => $key,
-    ))->fetchField();
+    ])->fetchField();
   }
 
   /**
    * {@inheritdoc}
    */
   public function getMultiple(array $keys) {
-    $values = array();
+    $values = [];
     try {
-      $result = $this->connection->query('SELECT name, value FROM {' . $this->connection->escapeTable($this->table) . '} WHERE name IN ( :keys[] ) AND collection = :collection', array(':keys[]' => $keys, ':collection' => $this->collection))->fetchAllAssoc('name');
+      $result = $this->connection->query('SELECT name, value FROM {' . $this->connection->escapeTable($this->table) . '} WHERE name IN ( :keys[] ) AND collection = :collection', [':keys[]' => $keys, ':collection' => $this->collection])->fetchAllAssoc('name');
       foreach ($keys as $key) {
         if (isset($result[$key])) {
           $values[$key] = $this->serializer->decode($result[$key]->value);
@@ -92,8 +92,8 @@ public function getMultiple(array $keys) {
    * {@inheritdoc}
    */
   public function getAll() {
-    $result = $this->connection->query('SELECT name, value FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection', array(':collection' => $this->collection));
-    $values = array();
+    $result = $this->connection->query('SELECT name, value FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection', [':collection' => $this->collection]);
+    $values = [];
 
     foreach ($result as $item) {
       if ($item) {
@@ -108,11 +108,11 @@ public function getAll() {
    */
   public function set($key, $value) {
     $this->connection->merge($this->table)
-      ->keys(array(
+      ->keys([
         'name' => $key,
         'collection' => $this->collection,
-      ))
-      ->fields(array('value' => $this->serializer->encode($value)))
+      ])
+      ->fields(['value' => $this->serializer->encode($value)])
       ->execute();
   }
 
@@ -121,11 +121,11 @@ public function set($key, $value) {
    */
   public function setIfNotExists($key, $value) {
     $result = $this->connection->merge($this->table)
-      ->insertFields(array(
+      ->insertFields([
         'collection' => $this->collection,
         'name' => $key,
         'value' => $this->serializer->encode($value),
-      ))
+      ])
       ->condition('collection', $this->collection)
       ->condition('name', $key)
       ->execute();
@@ -137,7 +137,7 @@ public function setIfNotExists($key, $value) {
    */
   public function rename($key, $new_key) {
     $this->connection->update($this->table)
-      ->fields(array('name' => $new_key))
+      ->fields(['name' => $new_key])
       ->condition('collection', $this->collection)
       ->condition('name', $key)
       ->execute();
diff --git a/core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php b/core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php
index 9f3b4284f3239ed04ec85abb2399e79afd7edb1d..8e487d18330119778081a749c57d7bad708adfe6 100644
--- a/core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php
+++ b/core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php
@@ -34,11 +34,11 @@ public function __construct($collection, SerializationInterface $serializer, Con
    * {@inheritdoc}
    */
   public function has($key) {
-    return (bool) $this->connection->query('SELECT 1 FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name = :key AND expire > :now', array(
+    return (bool) $this->connection->query('SELECT 1 FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND name = :key AND expire > :now', [
       ':collection' => $this->collection,
       ':key' => $key,
       ':now' => REQUEST_TIME,
-    ))->fetchField();
+    ])->fetchField();
   }
 
   /**
@@ -47,12 +47,12 @@ public function has($key) {
   public function getMultiple(array $keys) {
     $values = $this->connection->query(
       'SELECT name, value FROM {' . $this->connection->escapeTable($this->table) . '} WHERE expire > :now AND name IN ( :keys[] ) AND collection = :collection',
-      array(
+      [
         ':now' => REQUEST_TIME,
         ':keys[]' => $keys,
         ':collection' => $this->collection,
-      ))->fetchAllKeyed();
-    return array_map(array($this->serializer, 'decode'), $values);
+      ])->fetchAllKeyed();
+    return array_map([$this->serializer, 'decode'], $values);
   }
 
   /**
@@ -61,11 +61,11 @@ public function getMultiple(array $keys) {
   public function getAll() {
     $values = $this->connection->query(
       'SELECT name, value FROM {' . $this->connection->escapeTable($this->table) . '} WHERE collection = :collection AND expire > :now',
-      array(
+      [
         ':collection' => $this->collection,
         ':now' => REQUEST_TIME
-      ))->fetchAllKeyed();
-    return array_map(array($this->serializer, 'decode'), $values);
+      ])->fetchAllKeyed();
+    return array_map([$this->serializer, 'decode'], $values);
   }
 
   /**
@@ -73,14 +73,14 @@ public function getAll() {
    */
   function setWithExpire($key, $value, $expire) {
     $this->connection->merge($this->table)
-      ->keys(array(
+      ->keys([
         'name' => $key,
         'collection' => $this->collection,
-      ))
-      ->fields(array(
+      ])
+      ->fields([
         'value' => $this->serializer->encode($value),
         'expire' => REQUEST_TIME + $expire,
-      ))
+      ])
       ->execute();
   }
 
@@ -89,12 +89,12 @@ function setWithExpire($key, $value, $expire) {
    */
   function setWithExpireIfNotExists($key, $value, $expire) {
     $result = $this->connection->merge($this->table)
-      ->insertFields(array(
+      ->insertFields([
         'collection' => $this->collection,
         'name' => $key,
         'value' => $this->serializer->encode($value),
         'expire' => REQUEST_TIME + $expire,
-      ))
+      ])
       ->condition('collection', $this->collection)
       ->condition('name', $key)
       ->execute();
diff --git a/core/lib/Drupal/Core/KeyValueStore/KeyValueDatabaseExpirableFactory.php b/core/lib/Drupal/Core/KeyValueStore/KeyValueDatabaseExpirableFactory.php
index 5670fe5b283f3dbfd13291fc2d6cdc7a3a7a2556..7815b8c15788b1bc7a6e3aea51fee32dbb34c9b1 100644
--- a/core/lib/Drupal/Core/KeyValueStore/KeyValueDatabaseExpirableFactory.php
+++ b/core/lib/Drupal/Core/KeyValueStore/KeyValueDatabaseExpirableFactory.php
@@ -15,7 +15,7 @@ class KeyValueDatabaseExpirableFactory implements KeyValueExpirableFactoryInterf
    *
    * @var \Drupal\Core\KeyValueStore\DatabaseStorageExpirable[]
    */
-  protected $storages = array();
+  protected $storages = [];
 
   /**
    * The serialization class to use.
diff --git a/core/lib/Drupal/Core/KeyValueStore/KeyValueFactory.php b/core/lib/Drupal/Core/KeyValueStore/KeyValueFactory.php
index 9f6d28cc4bbe6be1cd85a3a98c52bf23da71a351..0801ca1f0a79c82583970f4163ac5628145c649c 100644
--- a/core/lib/Drupal/Core/KeyValueStore/KeyValueFactory.php
+++ b/core/lib/Drupal/Core/KeyValueStore/KeyValueFactory.php
@@ -37,7 +37,7 @@ class KeyValueFactory implements KeyValueFactoryInterface {
    *
    * @var array
    */
-  protected $stores = array();
+  protected $stores = [];
 
   /**
    * var \Symfony\Component\DependencyInjection\ContainerInterface
@@ -50,7 +50,7 @@ class KeyValueFactory implements KeyValueFactoryInterface {
    * @param array $options
    *   (optional) Collection-specific storage override options.
    */
-  function __construct(ContainerInterface $container, array $options = array()) {
+  function __construct(ContainerInterface $container, array $options = []) {
     $this->container = $container;
     $this->options = $options;
   }
diff --git a/core/lib/Drupal/Core/KeyValueStore/KeyValueMemoryFactory.php b/core/lib/Drupal/Core/KeyValueStore/KeyValueMemoryFactory.php
index f1720264cc560567e5903ad2fa8900abb6a52709..701e2bd918307ad2552b8864f4e12044f5ad3f0a 100644
--- a/core/lib/Drupal/Core/KeyValueStore/KeyValueMemoryFactory.php
+++ b/core/lib/Drupal/Core/KeyValueStore/KeyValueMemoryFactory.php
@@ -12,7 +12,7 @@ class KeyValueMemoryFactory implements KeyValueFactoryInterface {
    *
    * @var array
    */
-  protected $collections = array();
+  protected $collections = [];
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/KeyValueStore/MemoryStorage.php b/core/lib/Drupal/Core/KeyValueStore/MemoryStorage.php
index ea9e056c34db36d3829357249f51e83575c0de31..d6a6ca91d40924d578fd63b199b77841c451ccd6 100644
--- a/core/lib/Drupal/Core/KeyValueStore/MemoryStorage.php
+++ b/core/lib/Drupal/Core/KeyValueStore/MemoryStorage.php
@@ -12,7 +12,7 @@ class MemoryStorage extends StorageBase {
    *
    * @var array
    */
-  protected $data = array();
+  protected $data = [];
 
   /**
    * {@inheritdoc}
@@ -95,7 +95,7 @@ public function deleteMultiple(array $keys) {
    * {@inheritdoc}
    */
   public function deleteAll() {
-    $this->data = array();
+    $this->data = [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/KeyValueStore/NullStorageExpirable.php b/core/lib/Drupal/Core/KeyValueStore/NullStorageExpirable.php
index 8e7ab5313119c36cedf7360ee273ab71145dfc77..5ea8cbc9dc32dbbb1b49bf68e64eb369d2d8def6 100644
--- a/core/lib/Drupal/Core/KeyValueStore/NullStorageExpirable.php
+++ b/core/lib/Drupal/Core/KeyValueStore/NullStorageExpirable.php
@@ -12,7 +12,7 @@ class NullStorageExpirable implements KeyValueStoreExpirableInterface {
    *
    * @var array
    */
-  protected $data = array();
+  protected $data = [];
 
   /**
    * The name of the collection holding key and value pairs.
@@ -46,14 +46,14 @@ public function get($key, $default = NULL) {
    * {@inheritdoc}
    */
   public function getMultiple(array $keys) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getAll() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/KeyValueStore/StorageBase.php b/core/lib/Drupal/Core/KeyValueStore/StorageBase.php
index ecdd08c5751dbe9bbe590dd72ce0d9b7bfb66e7d..ad5e3b4a56f7b7d787a0acc25355c10874a99c3e 100644
--- a/core/lib/Drupal/Core/KeyValueStore/StorageBase.php
+++ b/core/lib/Drupal/Core/KeyValueStore/StorageBase.php
@@ -32,7 +32,7 @@ public function getCollectionName() {
    * {@inheritdoc}
    */
   public function get($key, $default = NULL) {
-    $values = $this->getMultiple(array($key));
+    $values = $this->getMultiple([$key]);
     return isset($values[$key]) ? $values[$key] : $default;
   }
 
@@ -49,7 +49,7 @@ public function setMultiple(array $data) {
    * {@inheritdoc}
    */
   public function delete($key) {
-    $this->deleteMultiple(array($key));
+    $this->deleteMultiple([$key]);
   }
 
 }
diff --git a/core/lib/Drupal/Core/Language/Language.php b/core/lib/Drupal/Core/Language/Language.php
index abaad81d592e0e52e619cc09ff91c12c5c66a6b5..5c4068d0505d63e7d9a47fc3849fb98c70e171fc 100644
--- a/core/lib/Drupal/Core/Language/Language.php
+++ b/core/lib/Drupal/Core/Language/Language.php
@@ -16,13 +16,13 @@ class Language implements LanguageInterface {
    *
    * @var array
    */
-  public static $defaultValues = array(
+  public static $defaultValues = [
     'id' => 'en',
     'name' => 'English',
     'direction' => self::DIRECTION_LTR,
     'weight' => 0,
     'locked' => FALSE,
-  );
+  ];
 
   // Properties within the Language are set up as the default language.
 
@@ -74,7 +74,7 @@ class Language implements LanguageInterface {
    *   An array of property values, keyed by property name, used to construct
    *   the language.
    */
-  public function __construct(array $values = array()) {
+  public function __construct(array $values = []) {
     // Set all the provided properties for the language.
     foreach ($values as $key => $value) {
       if (property_exists($this, $key)) {
diff --git a/core/lib/Drupal/Core/Language/LanguageManager.php b/core/lib/Drupal/Core/Language/LanguageManager.php
index ef5421713401639d33e5488758fac819fc2a1686..7f3ddc816bf34cd9a4c940860f2b67dc183641b6 100644
--- a/core/lib/Drupal/Core/Language/LanguageManager.php
+++ b/core/lib/Drupal/Core/Language/LanguageManager.php
@@ -23,7 +23,7 @@ class LanguageManager implements LanguageManagerInterface {
    *
    * @see \Drupal\Core\Language\LanguageManager::getLanguages()
    */
-  protected $languages = array();
+  protected $languages = [];
 
   /**
    * The default language object.
@@ -53,7 +53,7 @@ public function isMultilingual() {
    * {@inheritdoc}
    */
   public function getLanguageTypes() {
-    return array(LanguageInterface::TYPE_INTERFACE, LanguageInterface::TYPE_CONTENT, LanguageInterface::TYPE_URL);
+    return [LanguageInterface::TYPE_INTERFACE, LanguageInterface::TYPE_CONTENT, LanguageInterface::TYPE_URL];
   }
 
   /**
@@ -77,21 +77,21 @@ public function getLanguageTypes() {
    *   hook_language_types_info().
    */
   public function getDefinedLanguageTypesInfo() {
-    $this->definedLanguageTypesInfo = array(
-      LanguageInterface::TYPE_INTERFACE => array(
+    $this->definedLanguageTypesInfo = [
+      LanguageInterface::TYPE_INTERFACE => [
         'name' => new TranslatableMarkup('Interface text'),
         'description' => new TranslatableMarkup('Order of language detection methods for interface text. If a translation of interface text is available in the detected language, it will be displayed.'),
         'locked' => TRUE,
-      ),
-      LanguageInterface::TYPE_CONTENT => array(
+      ],
+      LanguageInterface::TYPE_CONTENT => [
         'name' => new TranslatableMarkup('Content'),
         'description' => new TranslatableMarkup('Order of language detection methods for content. If a version of content is available in the detected language, it will be displayed.'),
         'locked' => TRUE,
-      ),
-      LanguageInterface::TYPE_URL => array(
+      ],
+      LanguageInterface::TYPE_URL => [
         'locked' => TRUE,
-      ),
-    );
+      ],
+    ];
 
     return $this->definedLanguageTypesInfo;
   }
@@ -127,7 +127,7 @@ public function getLanguages($flags = LanguageInterface::STATE_CONFIGURABLE) {
       // The default language and locked languages comprise the full language
       // list.
       $default = $this->getDefaultLanguage();
-      $languages = array($default->getId() => $default);
+      $languages = [$default->getId() => $default];
       $languages += $this->getDefaultLockedLanguages($default->getWeight());
 
       // Filter the full list of languages based on the value of $flags.
@@ -165,33 +165,33 @@ public function getLanguageName($langcode) {
     if (empty($langcode)) {
       return new TranslatableMarkup('Unknown');
     }
-    return new TranslatableMarkup('Unknown (@langcode)', array('@langcode' => $langcode));
+    return new TranslatableMarkup('Unknown (@langcode)', ['@langcode' => $langcode]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function getDefaultLockedLanguages($weight = 0) {
-    $languages = array();
+    $languages = [];
 
-    $locked_language = array(
+    $locked_language = [
       'default' => FALSE,
       'locked' => TRUE,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     // This is called very early while initializing the language system. Prevent
     // early t() calls by using the TranslatableMarkup.
-    $languages[LanguageInterface::LANGCODE_NOT_SPECIFIED] = new Language(array(
+    $languages[LanguageInterface::LANGCODE_NOT_SPECIFIED] = new Language([
       'id' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
       'name' => new TranslatableMarkup('Not specified'),
       'weight' => ++$weight,
-    ) + $locked_language);
+    ] + $locked_language);
 
-    $languages[LanguageInterface::LANGCODE_NOT_APPLICABLE] = new Language(array(
+    $languages[LanguageInterface::LANGCODE_NOT_APPLICABLE] = new Language([
       'id' => LanguageInterface::LANGCODE_NOT_APPLICABLE,
       'name' => new TranslatableMarkup('Not applicable'),
       'weight' => ++$weight,
-    ) + $locked_language);
+    ] + $locked_language);
 
     return $languages;
   }
@@ -207,15 +207,15 @@ public function isLanguageLocked($langcode) {
   /**
    * {@inheritdoc}
    */
-  public function getFallbackCandidates(array $context = array()) {
-    return array(LanguageInterface::LANGCODE_DEFAULT);
+  public function getFallbackCandidates(array $context = []) {
+    return [LanguageInterface::LANGCODE_DEFAULT];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getLanguageSwitchLinks($type, Url $url) {
-    return array();
+    return [];
   }
 
   /**
@@ -229,103 +229,103 @@ public static function getStandardLanguageList() {
     // The "Left-to-right marker" comments and the enclosed UTF-8 markers are to
     // make otherwise strange looking PHP syntax natural (to not be displayed in
     // right to left). See https://www.drupal.org/node/128866#comment-528929.
-    return array(
-      'af' => array('Afrikaans', 'Afrikaans'),
-      'am' => array('Amharic', 'አማርኛ'),
-      'ar' => array('Arabic', /* Left-to-right marker "‭" */ 'العربية', LanguageInterface::DIRECTION_RTL),
-      'ast' => array('Asturian', 'Asturianu'),
-      'az' => array('Azerbaijani', 'Azərbaycanca'),
-      'be' => array('Belarusian', 'Беларуская'),
-      'bg' => array('Bulgarian', 'Български'),
-      'bn' => array('Bengali', 'বাংলা'),
-      'bo' => array('Tibetan', 'བོད་སྐད་'),
-      'bs' => array('Bosnian', 'Bosanski'),
-      'ca' => array('Catalan', 'Català'),
-      'cs' => array('Czech', 'Čeština'),
-      'cy' => array('Welsh', 'Cymraeg'),
-      'da' => array('Danish', 'Dansk'),
-      'de' => array('German', 'Deutsch'),
-      'dz' => array('Dzongkha', 'རྫོང་ཁ'),
-      'el' => array('Greek', 'Ελληνικά'),
-      'en' => array('English', 'English'),
-      'en-x-simple' => array('Simple English', 'Simple English'),
-      'eo' => array('Esperanto', 'Esperanto'),
-      'es' => array('Spanish', 'Español'),
-      'et' => array('Estonian', 'Eesti'),
-      'eu' => array('Basque', 'Euskera'),
-      'fa' => array('Persian, Farsi', /* Left-to-right marker "‭" */ 'فارسی', LanguageInterface::DIRECTION_RTL),
-      'fi' => array('Finnish', 'Suomi'),
-      'fil' => array('Filipino', 'Filipino'),
-      'fo' => array('Faeroese', 'Føroyskt'),
-      'fr' => array('French', 'Français'),
-      'fy' => array('Frisian, Western', 'Frysk'),
-      'ga' => array('Irish', 'Gaeilge'),
-      'gd' => array('Scots Gaelic', 'Gàidhlig'),
-      'gl' => array('Galician', 'Galego'),
-      'gsw-berne' => array('Swiss German', 'Schwyzerdütsch'),
-      'gu' => array('Gujarati', 'ગુજરાતી'),
-      'he' => array('Hebrew', /* Left-to-right marker "‭" */ 'עברית', LanguageInterface::DIRECTION_RTL),
-      'hi' => array('Hindi', 'हिन्दी'),
-      'hr' => array('Croatian', 'Hrvatski'),
-      'ht' => array('Haitian Creole', 'Kreyòl ayisyen'),
-      'hu' => array('Hungarian', 'Magyar'),
-      'hy' => array('Armenian', 'Հայերեն'),
-      'id' => array('Indonesian', 'Bahasa Indonesia'),
-      'is' => array('Icelandic', 'Íslenska'),
-      'it' => array('Italian', 'Italiano'),
-      'ja' => array('Japanese', '日本語'),
-      'jv' => array('Javanese', 'Basa Java'),
-      'ka' => array('Georgian', 'ქართული ენა'),
-      'kk' => array('Kazakh', 'Қазақ'),
-      'km' => array('Khmer', 'ភាសាខ្មែរ'),
-      'kn' => array('Kannada', 'ಕನ್ನಡ'),
-      'ko' => array('Korean', '한국어'),
-      'ku' => array('Kurdish', 'Kurdî'),
-      'ky' => array('Kyrgyz', 'Кыргызча'),
-      'lo' => array('Lao', 'ພາສາລາວ'),
-      'lt' => array('Lithuanian', 'Lietuvių'),
-      'lv' => array('Latvian', 'Latviešu'),
-      'mg' => array('Malagasy', 'Malagasy'),
-      'mk' => array('Macedonian', 'Македонски'),
-      'ml' => array('Malayalam', 'മലയാളം'),
-      'mn' => array('Mongolian', 'монгол'),
-      'mr' => array('Marathi', 'मराठी'),
-      'ms' => array('Bahasa Malaysia', 'بهاس ملايو'),
-      'my' => array('Burmese', 'ဗမာစကား'),
-      'ne' => array('Nepali', 'नेपाली'),
-      'nl' => array('Dutch', 'Nederlands'),
-      'nb' => array('Norwegian Bokmål', 'Norsk, bokmål'),
-      'nn' => array('Norwegian Nynorsk', 'Norsk, nynorsk'),
-      'oc' => array('Occitan', 'Occitan'),
-      'pa' => array('Punjabi', 'ਪੰਜਾਬੀ'),
-      'pl' => array('Polish', 'Polski'),
-      'pt-pt' => array('Portuguese, Portugal', 'Português, Portugal'),
-      'pt-br' => array('Portuguese, Brazil', 'Português, Brasil'),
-      'ro' => array('Romanian', 'Română'),
-      'ru' => array('Russian', 'Русский'),
-      'sco' => array('Scots', 'Scots'),
-      'se' => array('Northern Sami', 'Sámi'),
-      'si' => array('Sinhala', 'සිංහල'),
-      'sk' => array('Slovak', 'Slovenčina'),
-      'sl' => array('Slovenian', 'Slovenščina'),
-      'sq' => array('Albanian', 'Shqip'),
-      'sr' => array('Serbian', 'Српски'),
-      'sv' => array('Swedish', 'Svenska'),
-      'sw' => array('Swahili', 'Kiswahili'),
-      'ta' => array('Tamil', 'தமிழ்'),
-      'ta-lk' => array('Tamil, Sri Lanka', 'தமிழ், இலங்கை'),
-      'te' => array('Telugu', 'తెలుగు'),
-      'th' => array('Thai', 'ภาษาไทย'),
-      'tr' => array('Turkish', 'Türkçe'),
-      'tyv' => array('Tuvan', 'Тыва дыл'),
-      'ug' => array('Uyghur', /* Left-to-right marker "‭" */ 'ئۇيغۇرچە', LanguageInterface::DIRECTION_RTL),
-      'uk' => array('Ukrainian', 'Українська'),
-      'ur' => array('Urdu', /* Left-to-right marker "‭" */ 'اردو', LanguageInterface::DIRECTION_RTL),
-      'vi' => array('Vietnamese', 'Tiếng Việt'),
-      'xx-lolspeak' => array('Lolspeak', 'Lolspeak'),
-      'zh-hans' => array('Chinese, Simplified', '简体中文'),
-      'zh-hant' => array('Chinese, Traditional', '繁體中文'),
-    );
+    return [
+      'af' => ['Afrikaans', 'Afrikaans'],
+      'am' => ['Amharic', 'አማርኛ'],
+      'ar' => ['Arabic', /* Left-to-right marker "‭" */ 'العربية', LanguageInterface::DIRECTION_RTL],
+      'ast' => ['Asturian', 'Asturianu'],
+      'az' => ['Azerbaijani', 'Azərbaycanca'],
+      'be' => ['Belarusian', 'Беларуская'],
+      'bg' => ['Bulgarian', 'Български'],
+      'bn' => ['Bengali', 'বাংলা'],
+      'bo' => ['Tibetan', 'བོད་སྐད་'],
+      'bs' => ['Bosnian', 'Bosanski'],
+      'ca' => ['Catalan', 'Català'],
+      'cs' => ['Czech', 'Čeština'],
+      'cy' => ['Welsh', 'Cymraeg'],
+      'da' => ['Danish', 'Dansk'],
+      'de' => ['German', 'Deutsch'],
+      'dz' => ['Dzongkha', 'རྫོང་ཁ'],
+      'el' => ['Greek', 'Ελληνικά'],
+      'en' => ['English', 'English'],
+      'en-x-simple' => ['Simple English', 'Simple English'],
+      'eo' => ['Esperanto', 'Esperanto'],
+      'es' => ['Spanish', 'Español'],
+      'et' => ['Estonian', 'Eesti'],
+      'eu' => ['Basque', 'Euskera'],
+      'fa' => ['Persian, Farsi', /* Left-to-right marker "‭" */ 'فارسی', LanguageInterface::DIRECTION_RTL],
+      'fi' => ['Finnish', 'Suomi'],
+      'fil' => ['Filipino', 'Filipino'],
+      'fo' => ['Faeroese', 'Føroyskt'],
+      'fr' => ['French', 'Français'],
+      'fy' => ['Frisian, Western', 'Frysk'],
+      'ga' => ['Irish', 'Gaeilge'],
+      'gd' => ['Scots Gaelic', 'Gàidhlig'],
+      'gl' => ['Galician', 'Galego'],
+      'gsw-berne' => ['Swiss German', 'Schwyzerdütsch'],
+      'gu' => ['Gujarati', 'ગુજરાતી'],
+      'he' => ['Hebrew', /* Left-to-right marker "‭" */ 'עברית', LanguageInterface::DIRECTION_RTL],
+      'hi' => ['Hindi', 'हिन्दी'],
+      'hr' => ['Croatian', 'Hrvatski'],
+      'ht' => ['Haitian Creole', 'Kreyòl ayisyen'],
+      'hu' => ['Hungarian', 'Magyar'],
+      'hy' => ['Armenian', 'Հայերեն'],
+      'id' => ['Indonesian', 'Bahasa Indonesia'],
+      'is' => ['Icelandic', 'Íslenska'],
+      'it' => ['Italian', 'Italiano'],
+      'ja' => ['Japanese', '日本語'],
+      'jv' => ['Javanese', 'Basa Java'],
+      'ka' => ['Georgian', 'ქართული ენა'],
+      'kk' => ['Kazakh', 'Қазақ'],
+      'km' => ['Khmer', 'ភាសាខ្មែរ'],
+      'kn' => ['Kannada', 'ಕನ್ನಡ'],
+      'ko' => ['Korean', '한국어'],
+      'ku' => ['Kurdish', 'Kurdî'],
+      'ky' => ['Kyrgyz', 'Кыргызча'],
+      'lo' => ['Lao', 'ພາສາລາວ'],
+      'lt' => ['Lithuanian', 'Lietuvių'],
+      'lv' => ['Latvian', 'Latviešu'],
+      'mg' => ['Malagasy', 'Malagasy'],
+      'mk' => ['Macedonian', 'Македонски'],
+      'ml' => ['Malayalam', 'മലയാളം'],
+      'mn' => ['Mongolian', 'монгол'],
+      'mr' => ['Marathi', 'मराठी'],
+      'ms' => ['Bahasa Malaysia', 'بهاس ملايو'],
+      'my' => ['Burmese', 'ဗမာစကား'],
+      'ne' => ['Nepali', 'नेपाली'],
+      'nl' => ['Dutch', 'Nederlands'],
+      'nb' => ['Norwegian Bokmål', 'Norsk, bokmål'],
+      'nn' => ['Norwegian Nynorsk', 'Norsk, nynorsk'],
+      'oc' => ['Occitan', 'Occitan'],
+      'pa' => ['Punjabi', 'ਪੰਜਾਬੀ'],
+      'pl' => ['Polish', 'Polski'],
+      'pt-pt' => ['Portuguese, Portugal', 'Português, Portugal'],
+      'pt-br' => ['Portuguese, Brazil', 'Português, Brasil'],
+      'ro' => ['Romanian', 'Română'],
+      'ru' => ['Russian', 'Русский'],
+      'sco' => ['Scots', 'Scots'],
+      'se' => ['Northern Sami', 'Sámi'],
+      'si' => ['Sinhala', 'සිංහල'],
+      'sk' => ['Slovak', 'Slovenčina'],
+      'sl' => ['Slovenian', 'Slovenščina'],
+      'sq' => ['Albanian', 'Shqip'],
+      'sr' => ['Serbian', 'Српски'],
+      'sv' => ['Swedish', 'Svenska'],
+      'sw' => ['Swahili', 'Kiswahili'],
+      'ta' => ['Tamil', 'தமிழ்'],
+      'ta-lk' => ['Tamil, Sri Lanka', 'தமிழ், இலங்கை'],
+      'te' => ['Telugu', 'తెలుగు'],
+      'th' => ['Thai', 'ภาษาไทย'],
+      'tr' => ['Turkish', 'Türkçe'],
+      'tyv' => ['Tuvan', 'Тыва дыл'],
+      'ug' => ['Uyghur', /* Left-to-right marker "‭" */ 'ئۇيغۇرچە', LanguageInterface::DIRECTION_RTL],
+      'uk' => ['Ukrainian', 'Українська'],
+      'ur' => ['Urdu', /* Left-to-right marker "‭" */ 'اردو', LanguageInterface::DIRECTION_RTL],
+      'vi' => ['Vietnamese', 'Tiếng Việt'],
+      'xx-lolspeak' => ['Lolspeak', 'Lolspeak'],
+      'zh-hans' => ['Chinese, Simplified', '简体中文'],
+      'zh-hant' => ['Chinese, Traditional', '繁體中文'],
+    ];
   }
 
   /**
@@ -391,7 +391,7 @@ protected function filterLanguages(array $languages, $flags = LanguageInterface:
       return $languages;
     }
 
-    $filtered_languages = array();
+    $filtered_languages = [];
     // Add the site's default language if requested.
     if ($flags & LanguageInterface::STATE_SITE_DEFAULT) {
 
@@ -399,13 +399,13 @@ protected function filterLanguages(array $languages, $flags = LanguageInterface:
       // default language only for runtime.
       $defaultLanguage = $this->getDefaultLanguage();
       $default = new Language(
-        array(
+        [
           'id' => $defaultLanguage->getId(),
           'name' => new TranslatableMarkup("Site's default language (@lang_name)",
-            array('@lang_name' => $defaultLanguage->getName())),
+            ['@lang_name' => $defaultLanguage->getName()]),
           'direction' => $defaultLanguage->getDirection(),
           'weight' => $defaultLanguage->getWeight(),
-        )
+        ]
       );
       $filtered_languages[LanguageInterface::LANGCODE_SITE_DEFAULT] = $default;
     }
diff --git a/core/lib/Drupal/Core/Language/LanguageManagerInterface.php b/core/lib/Drupal/Core/Language/LanguageManagerInterface.php
index be0188d429e770ff1b820cff3380eaa57676b603..eaefd18a276c2bc7876eb5c7ec4cdf17de036bd3 100644
--- a/core/lib/Drupal/Core/Language/LanguageManagerInterface.php
+++ b/core/lib/Drupal/Core/Language/LanguageManagerInterface.php
@@ -161,7 +161,7 @@ public function isLanguageLocked($langcode);
    *   An array of language codes sorted by priority: first values should be
    *   tried first.
    */
-  public function getFallbackCandidates(array $context = array());
+  public function getFallbackCandidates(array $context = []);
 
   /**
    * Returns the language switch links for the given language type.
diff --git a/core/lib/Drupal/Core/Link.php b/core/lib/Drupal/Core/Link.php
index e7c9e3a83ca0a9335943150948b93c390fa2b647..e435d4427910995adad5f38e65ec0a4433cfc0c5 100644
--- a/core/lib/Drupal/Core/Link.php
+++ b/core/lib/Drupal/Core/Link.php
@@ -57,7 +57,7 @@ public function __construct($text, Url $url) {
    *
    * @return static
    */
-  public static function createFromRoute($text, $route_name, $route_parameters = array(), $options = array()) {
+  public static function createFromRoute($text, $route_name, $route_parameters = [], $options = []) {
     return new static($text, new Url($route_name, $route_parameters, $options));
   }
 
diff --git a/core/lib/Drupal/Core/Locale/CountryManager.php b/core/lib/Drupal/Core/Locale/CountryManager.php
index 451758e082734e2cfd2cc8bb04c4969b3a0207da..adc110cae17772a254f35e4fd7e77ec0b351a11f 100644
--- a/core/lib/Drupal/Core/Locale/CountryManager.php
+++ b/core/lib/Drupal/Core/Locale/CountryManager.php
@@ -37,7 +37,7 @@ public function __construct(ModuleHandlerInterface $module_handler) {
    *   An array of country code => country name pairs.
    */
   public static function getStandardList() {
-    $countries = array(
+    $countries = [
       'AC' => t('Ascension Island'),
       'AD' => t('Andorra'),
       'AE' => t('United Arab Emirates'),
@@ -296,7 +296,7 @@ public static function getStandardList() {
       'ZA' => t('South Africa'),
       'ZM' => t('Zambia'),
       'ZW' => t('Zimbabwe'),
-    );
+    ];
 
     // Sort the list.
     natcasesort($countries);
diff --git a/core/lib/Drupal/Core/Lock/DatabaseLockBackend.php b/core/lib/Drupal/Core/Lock/DatabaseLockBackend.php
index d09502826f4926318f4b5cee84150904e705783c..91077e7ad3104454543c051699ab4632b718987f 100644
--- a/core/lib/Drupal/Core/Lock/DatabaseLockBackend.php
+++ b/core/lib/Drupal/Core/Lock/DatabaseLockBackend.php
@@ -34,7 +34,7 @@ class DatabaseLockBackend extends LockBackendAbstract {
   public function __construct(Connection $database) {
     // __destruct() is causing problems with garbage collections, register a
     // shutdown function instead.
-    drupal_register_shutdown_function(array($this, 'releaseAll'));
+    drupal_register_shutdown_function([$this, 'releaseAll']);
     $this->database = $database;
   }
 
@@ -48,7 +48,7 @@ public function acquire($name, $timeout = 30.0) {
     if (isset($this->locks[$name])) {
       // Try to extend the expiration of a lock we already acquired.
       $success = (bool) $this->database->update('semaphore')
-        ->fields(array('expire' => $expire))
+        ->fields(['expire' => $expire])
         ->condition('name', $name)
         ->condition('value', $this->getLockId())
         ->execute();
@@ -66,11 +66,11 @@ public function acquire($name, $timeout = 30.0) {
       do {
         try {
           $this->database->insert('semaphore')
-            ->fields(array(
+            ->fields([
               'name' => $name,
               'value' => $this->getLockId(),
               'expire' => $expire,
-            ))
+            ])
             ->execute();
           // We track all acquired locks in the global variable.
           $this->locks[$name] = TRUE;
@@ -107,7 +107,7 @@ public function acquire($name, $timeout = 30.0) {
    */
   public function lockMayBeAvailable($name) {
     try {
-      $lock = $this->database->query('SELECT expire, value FROM {semaphore} WHERE name = :name', array(':name' => $name))->fetchAssoc();
+      $lock = $this->database->query('SELECT expire, value FROM {semaphore} WHERE name = :name', [':name' => $name])->fetchAssoc();
     }
     catch (\Exception $e) {
       $this->catchException($e);
@@ -154,7 +154,7 @@ public function release($name) {
   public function releaseAll($lock_id = NULL) {
     // Only attempt to release locks if any were acquired.
     if (!empty($this->locks)) {
-      $this->locks = array();
+      $this->locks = [];
       if (empty($lock_id)) {
         $lock_id = $this->getLockId();
       }
diff --git a/core/lib/Drupal/Core/Lock/LockBackendAbstract.php b/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
index 32322d4e83bd15aa973b9e3611fd54552220ecba..41ee27cab4f83b3e2523a65f031f7cac59e6262d 100644
--- a/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
+++ b/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
@@ -21,7 +21,7 @@ abstract class LockBackendAbstract implements LockBackendInterface {
    *
    * @var array
    */
-  protected $locks = array();
+  protected $locks = [];
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Logger/LogMessageParser.php b/core/lib/Drupal/Core/Logger/LogMessageParser.php
index 3ce39bbf4ecc2f775ae46599b1a50039a05ef038..8a67df12dcaf2a47ea10193f806e69cca908b098 100644
--- a/core/lib/Drupal/Core/Logger/LogMessageParser.php
+++ b/core/lib/Drupal/Core/Logger/LogMessageParser.php
@@ -11,7 +11,7 @@ class LogMessageParser implements LogMessageParserInterface {
    * {@inheritdoc}
    */
   public function parseMessagePlaceholders(&$message, array &$context) {
-    $variables = array();
+    $variables = [];
     $has_psr3 = FALSE;
     if (($start = strpos($message, '{')) !== FALSE && strpos($message, '}') > $start) {
       $has_psr3 = TRUE;
diff --git a/core/lib/Drupal/Core/Logger/LoggerChannel.php b/core/lib/Drupal/Core/Logger/LoggerChannel.php
index 9253a24958cab32497da97c5a813aa25970065ca..51141f7846040a515350514408b78bab8e3f6eb5 100644
--- a/core/lib/Drupal/Core/Logger/LoggerChannel.php
+++ b/core/lib/Drupal/Core/Logger/LoggerChannel.php
@@ -46,7 +46,7 @@ class LoggerChannel implements LoggerChannelInterface {
    *
    * @var array
    */
-  protected $levelTranslation = array(
+  protected $levelTranslation = [
     LogLevel::EMERGENCY => RfcLogLevel::EMERGENCY,
     LogLevel::ALERT => RfcLogLevel::ALERT,
     LogLevel::CRITICAL => RfcLogLevel::CRITICAL,
@@ -55,14 +55,14 @@ class LoggerChannel implements LoggerChannelInterface {
     LogLevel::NOTICE => RfcLogLevel::NOTICE,
     LogLevel::INFO => RfcLogLevel::INFO,
     LogLevel::DEBUG => RfcLogLevel::DEBUG,
-  );
+  ];
 
   /**
    * An array of arrays of \Psr\Log\LoggerInterface keyed by priority.
    *
    * @var array
    */
-  protected $loggers = array();
+  protected $loggers = [];
 
   /**
    * The request stack object.
@@ -91,14 +91,14 @@ public function __construct($channel) {
   /**
    * {@inheritdoc}
    */
-  public function log($level, $message, array $context = array()) {
+  public function log($level, $message, array $context = []) {
     if ($this->callDepth == self::MAX_CALL_DEPTH) {
       return;
     }
     $this->callDepth++;
 
     // Merge in defaults.
-    $context += array(
+    $context += [
       'channel' => $this->channel,
       'link' => '',
       'user' => NULL,
@@ -107,7 +107,7 @@ public function log($level, $message, array $context = array()) {
       'referer' => '',
       'ip' => '',
       'timestamp' => time(),
-    );
+    ];
     // Some context values are only available when in a request context.
     if ($this->requestStack && $request = $this->requestStack->getCurrentRequest()) {
       $context['request_uri'] = $request->getUri();
@@ -174,7 +174,7 @@ public function addLogger(LoggerInterface $logger, $priority = 0) {
    *   An array of sorted loggers by priority.
    */
   protected function sortLoggers() {
-    $sorted = array();
+    $sorted = [];
     krsort($this->loggers);
 
     foreach ($this->loggers as $loggers) {
diff --git a/core/lib/Drupal/Core/Logger/LoggerChannelFactory.php b/core/lib/Drupal/Core/Logger/LoggerChannelFactory.php
index 2fa55316bf5777567a7b59cc6bf929050d956deb..6c487d1753175711ce9f18b7a3edd9fcad925961 100644
--- a/core/lib/Drupal/Core/Logger/LoggerChannelFactory.php
+++ b/core/lib/Drupal/Core/Logger/LoggerChannelFactory.php
@@ -17,14 +17,14 @@ class LoggerChannelFactory implements LoggerChannelFactoryInterface, ContainerAw
    *
    * @var \Drupal\Core\Logger\LoggerChannelInterface[]
    */
-  protected $channels = array();
+  protected $channels = [];
 
   /**
    * An array of arrays of \Psr\Log\LoggerInterface keyed by priority.
    *
    * @var array
    */
-  protected $loggers = array();
+  protected $loggers = [];
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Logger/RfcLoggerTrait.php b/core/lib/Drupal/Core/Logger/RfcLoggerTrait.php
index c05d733b15bcd51ff451a6b51b9a027e25ea06ec..0152efe2c7bf28d5b81f43e47c3a2b84505b4612 100644
--- a/core/lib/Drupal/Core/Logger/RfcLoggerTrait.php
+++ b/core/lib/Drupal/Core/Logger/RfcLoggerTrait.php
@@ -17,62 +17,62 @@ trait RfcLoggerTrait {
   /**
    * {@inheritdoc}
    */
-  public function emergency($message, array $context = array()) {
+  public function emergency($message, array $context = []) {
     $this->log(RfcLogLevel::EMERGENCY, $message, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function alert($message, array $context = array()) {
+  public function alert($message, array $context = []) {
     $this->log(RfcLogLevel::ALERT, $message, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function critical($message, array $context = array()) {
+  public function critical($message, array $context = []) {
     $this->log(RfcLogLevel::CRITICAL, $message, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function error($message, array $context = array()) {
+  public function error($message, array $context = []) {
     $this->log(RfcLogLevel::ERROR, $message, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function warning($message, array $context = array()) {
+  public function warning($message, array $context = []) {
     $this->log(RfcLogLevel::WARNING, $message, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function notice($message, array $context = array()) {
+  public function notice($message, array $context = []) {
     $this->log(RfcLogLevel::NOTICE, $message, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function info($message, array $context = array()) {
+  public function info($message, array $context = []) {
     $this->log(RfcLogLevel::INFO, $message, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function debug($message, array $context = array()) {
+  public function debug($message, array $context = []) {
     $this->log(RfcLogLevel::DEBUG, $message, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  abstract public function log($level, $message, array $context = array());
+  abstract public function log($level, $message, array $context = []);
 
 }
diff --git a/core/lib/Drupal/Core/Mail/MailFormatHelper.php b/core/lib/Drupal/Core/Mail/MailFormatHelper.php
index 3dffe830c20479600cd2d9abb734fbca7821bbcc..021028fce819b64ddc47705b9e6a8bf64d98292e 100644
--- a/core/lib/Drupal/Core/Mail/MailFormatHelper.php
+++ b/core/lib/Drupal/Core/Mail/MailFormatHelper.php
@@ -17,7 +17,7 @@ class MailFormatHelper {
    *
    * @var array
    */
-  protected static $urls = array();
+  protected static $urls = [];
 
   /**
    * Quoted regex expression based on base path.
@@ -31,7 +31,7 @@ class MailFormatHelper {
    *
    * @var array
    */
-  protected static $supportedTags = array();
+  protected static $supportedTags = [];
 
   /**
    * Performs format=flowed soft wrapping for mail (RFC 3676).
@@ -63,12 +63,12 @@ public static function wrapMail($text, $indent = '') {
       $text = preg_replace('/(?(?<!^--) +\n|  +\n)/m', "\n", $text);
       // Wrap each line at the needed width.
       $lines = explode("\n", $text);
-      array_walk($lines, '\Drupal\Core\Mail\MailFormatHelper::wrapMailLine', array('soft' => $soft, 'length' => strlen($indent)));
+      array_walk($lines, '\Drupal\Core\Mail\MailFormatHelper::wrapMailLine', ['soft' => $soft, 'length' => strlen($indent)]);
       $text = implode("\n", $lines);
     }
     else {
       // Wrap this line.
-      static::wrapMailLine($text, 0, array('soft' => $soft, 'length' => strlen($indent)));
+      static::wrapMailLine($text, 0, ['soft' => $soft, 'length' => strlen($indent)]);
     }
     // Empty lines with nothing but spaces.
     $text = preg_replace('/^ +\n/m', "\n", $text);
@@ -104,9 +104,9 @@ public static function wrapMail($text, $indent = '') {
   public static function htmlToText($string, $allowed_tags = NULL) {
     // Cache list of supported tags.
     if (empty(static::$supportedTags)) {
-      static::$supportedTags = array('a', 'em', 'i', 'strong', 'b', 'br', 'p',
+      static::$supportedTags = ['a', 'em', 'i', 'strong', 'b', 'br', 'p',
         'blockquote', 'ul', 'ol', 'li', 'dl', 'dt', 'dd', 'h1', 'h2', 'h3',
-        'h4', 'h5', 'h6', 'hr');
+        'h4', 'h5', 'h6', 'hr'];
     }
 
     // Make sure only supported tags are kept.
@@ -146,9 +146,9 @@ public static function htmlToText($string, $allowed_tags = NULL) {
     $casing = NULL;
     $output = '';
     // All current indentation string chunks.
-    $indent = array();
+    $indent = [];
     // Array of counters for opened lists.
-    $lists = array();
+    $lists = [];
     foreach ($split as $value) {
       // Holds a string ready to be formatted and output.
       $chunk = NULL;
@@ -302,12 +302,12 @@ public static function htmlToText($string, $allowed_tags = NULL) {
    */
   protected static function wrapMailLine(&$line, $key, $values) {
     $line_is_mime_header = FALSE;
-    $mime_headers = array(
+    $mime_headers = [
       'Content-Type',
       'Content-Transfer-Encoding',
       'Content-Disposition',
       'Content-Description',
-    );
+    ];
 
     // Do not break MIME headers which could be longer than 77 characters.
     foreach ($mime_headers as $header) {
@@ -336,7 +336,7 @@ protected static function htmlToMailUrls($match = NULL, $reset = FALSE) {
 
     if ($reset) {
       // Reset internal URL list.
-      static::$urls = array();
+      static::$urls = [];
     }
     else {
       if (empty(static::$regexp)) {
diff --git a/core/lib/Drupal/Core/Mail/MailManager.php b/core/lib/Drupal/Core/Mail/MailManager.php
index 2abba6b3c9950e4711674df6888712b141ed506d..6de2dd818c610c9c0ab7925c08463db585fe1204 100644
--- a/core/lib/Drupal/Core/Mail/MailManager.php
+++ b/core/lib/Drupal/Core/Mail/MailManager.php
@@ -50,7 +50,7 @@ class MailManager extends DefaultPluginManager implements MailManagerInterface {
    *
    * @var array
    */
-  protected $instances = array();
+  protected $instances = [];
 
   /**
    * Constructs the MailManager object.
@@ -163,7 +163,7 @@ public function getInstance(array $options) {
   /**
    * {@inheritdoc}
    */
-  public function mail($module, $key, $to, $langcode, $params = array(), $reply = NULL, $send = TRUE) {
+  public function mail($module, $key, $to, $langcode, $params = [], $reply = NULL, $send = TRUE) {
     // Mailing can invoke rendering (e.g., generating URLs, replacing tokens),
     // but e-mails are not HTTP responses: they're not cached, they don't have
     // attachments. Therefore we perform mailing inside its own render context,
@@ -215,7 +215,7 @@ public function mail($module, $key, $to, $langcode, $params = array(), $reply =
    *
    * @see \Drupal\Core\Mail\MailManagerInterface::mail()
    */
-  public function doMail($module, $key, $to, $langcode, $params = array(), $reply = NULL, $send = TRUE) {
+  public function doMail($module, $key, $to, $langcode, $params = [], $reply = NULL, $send = TRUE) {
     $site_config = $this->configFactory->get('system.site');
     $site_mail = $site_config->get('mail');
     if (empty($site_mail)) {
@@ -223,7 +223,7 @@ public function doMail($module, $key, $to, $langcode, $params = array(), $reply
     }
 
     // Bundle up the variables into a structured array for altering.
-    $message = array(
+    $message = [
       'id' => $module . '_' . $key,
       'module' => $module,
       'key' => $key,
@@ -234,16 +234,16 @@ public function doMail($module, $key, $to, $langcode, $params = array(), $reply
       'params' => $params,
       'send' => TRUE,
       'subject' => '',
-      'body' => array(),
-    );
+      'body' => [],
+    ];
 
     // Build the default headers.
-    $headers = array(
+    $headers = [
       'MIME-Version' => '1.0',
       'Content-Type' => 'text/plain; charset=UTF-8; format=flowed; delsp=yes',
       'Content-Transfer-Encoding' => '8Bit',
       'X-Mailer' => 'Drupal',
-    );
+    ];
     // To prevent email from looking like spam, the addresses in the Sender and
     // Return-Path headers should have a domain authorized to use the
     // originating SMTP server.
@@ -267,7 +267,7 @@ public function doMail($module, $key, $to, $langcode, $params = array(), $reply
     $this->moduleHandler->alter('mail', $message);
 
     // Retrieve the responsible implementation for this message.
-    $system = $this->getInstance(array('module' => $module, 'key' => $key));
+    $system = $this->getInstance(['module' => $module, 'key' => $key]);
 
     // Format the message body.
     $message = $system->format($message);
@@ -292,11 +292,11 @@ public function doMail($module, $key, $to, $langcode, $params = array(), $reply
         // Log errors.
         if (!$message['result']) {
           $this->loggerFactory->get('mail')
-            ->error('Error sending email (from %from to %to with reply-to %reply).', array(
+            ->error('Error sending email (from %from to %to with reply-to %reply).', [
             '%from' => $message['from'],
             '%to' => $message['to'],
             '%reply' => $message['reply-to'] ? $message['reply-to'] : $this->t('not set'),
-          ));
+          ]);
           drupal_set_message($this->t('Unable to send email. Contact the site administrator if the problem persists.'), 'error');
         }
       }
diff --git a/core/lib/Drupal/Core/Mail/MailManagerInterface.php b/core/lib/Drupal/Core/Mail/MailManagerInterface.php
index cdf4c8ae5140f60ef6575ef91441f6a7c591057f..0228fbcb971b8f5f860555797b6eb5f573a3dfdd 100644
--- a/core/lib/Drupal/Core/Mail/MailManagerInterface.php
+++ b/core/lib/Drupal/Core/Mail/MailManagerInterface.php
@@ -119,6 +119,6 @@ interface MailManagerInterface extends PluginManagerInterface {
    *   watchdog. (Success means nothing more than the message being accepted at
    *   php-level, which still doesn't guarantee it to be delivered.)
    */
-  public function mail($module, $key, $to, $langcode, $params = array(), $reply = NULL, $send = TRUE);
+  public function mail($module, $key, $to, $langcode, $params = [], $reply = NULL, $send = TRUE);
 
 }
diff --git a/core/lib/Drupal/Core/Mail/Plugin/Mail/PhpMail.php b/core/lib/Drupal/Core/Mail/Plugin/Mail/PhpMail.php
index 652c6b30552e1ed944a5ab5019620ca75be30c3f..1fced2e479182cd8198ea30b26267623fe771fed 100644
--- a/core/lib/Drupal/Core/Mail/Plugin/Mail/PhpMail.php
+++ b/core/lib/Drupal/Core/Mail/Plugin/Mail/PhpMail.php
@@ -61,7 +61,7 @@ public function mail(array $message) {
         unset($message['headers']['Return-Path']);
       }
     }
-    $mimeheaders = array();
+    $mimeheaders = [];
     foreach ($message['headers'] as $name => $value) {
       $mimeheaders[] = $name . ': ' . Unicode::mimeHeaderEncode($value);
     }
diff --git a/core/lib/Drupal/Core/Mail/Plugin/Mail/TestMailCollector.php b/core/lib/Drupal/Core/Mail/Plugin/Mail/TestMailCollector.php
index ede465e72986500cf4434cc789bf84a9e134de58..607906f4c8cdfbd5f3176e26b9e21e1d7d084a1c 100644
--- a/core/lib/Drupal/Core/Mail/Plugin/Mail/TestMailCollector.php
+++ b/core/lib/Drupal/Core/Mail/Plugin/Mail/TestMailCollector.php
@@ -21,7 +21,7 @@ class TestMailCollector extends PhpMail implements MailInterface {
    * {@inheritdoc}
    */
   public function mail(array $message) {
-    $captured_emails = \Drupal::state()->get('system.test_mail_collector') ?: array();
+    $captured_emails = \Drupal::state()->get('system.test_mail_collector') ?: [];
     $captured_emails[] = $message;
     \Drupal::state()->set('system.test_mail_collector', $captured_emails);
 
diff --git a/core/lib/Drupal/Core/Menu/ContextualLinkManager.php b/core/lib/Drupal/Core/Menu/ContextualLinkManager.php
index e264036fc4c9e7f1b9553596ea464f1260f5aec1..057f7ded40340b5dbd331c24b5ab01be5488d38d 100644
--- a/core/lib/Drupal/Core/Menu/ContextualLinkManager.php
+++ b/core/lib/Drupal/Core/Menu/ContextualLinkManager.php
@@ -27,7 +27,7 @@ class ContextualLinkManager extends DefaultPluginManager implements ContextualLi
    *
    * @var array
    */
-  protected $defaults = array(
+  protected $defaults = [
     // (required) The name of the route to link to.
     'route_name' => '',
     // (required) The contextual links group.
@@ -35,14 +35,14 @@ class ContextualLinkManager extends DefaultPluginManager implements ContextualLi
     // The static title text for the link.
     'title' => '',
     // The default link options.
-    'options' => array(),
+    'options' => [],
     // The weight of the link.
     'weight' => NULL,
     // Default class for contextual link implementations.
     'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
     // The plugin id. Set by the plugin system based on the top-level YAML key.
     'id' => '',
-  );
+  ];
 
   /**
    * A controller resolver object.
@@ -105,7 +105,7 @@ public function __construct(ControllerResolverInterface $controller_resolver, Mo
     $this->moduleHandler = $module_handler;
     $this->requestStack = $request_stack;
     $this->alterInfo('contextual_links_plugins');
-    $this->setCacheBackend($cache_backend, 'contextual_links_plugins:' . $language_manager->getCurrentLanguage()->getId(), array('contextual_links_plugins'));
+    $this->setCacheBackend($cache_backend, 'contextual_links_plugins:' . $language_manager->getCurrentLanguage()->getId(), ['contextual_links_plugins']);
   }
 
   /**
@@ -148,7 +148,7 @@ public function getContextualLinkPluginsByGroup($group_name) {
       $this->pluginsByGroup[$group_name] = $contextual_links;
     }
     else {
-      $contextual_links = array();
+      $contextual_links = [];
       foreach ($this->getDefinitions() as $plugin_id => $plugin_definition) {
         if ($plugin_definition['group'] == $group_name) {
           $contextual_links[$plugin_id] = $plugin_definition;
@@ -163,8 +163,8 @@ public function getContextualLinkPluginsByGroup($group_name) {
   /**
    * {@inheritdoc}
    */
-  public function getContextualLinksArrayByGroup($group_name, array $route_parameters, array $metadata = array()) {
-    $links = array();
+  public function getContextualLinksArrayByGroup($group_name, array $route_parameters, array $metadata = []) {
+    $links = [];
     $request = $this->requestStack->getCurrentRequest();
     foreach ($this->getContextualLinkPluginsByGroup($group_name) as $plugin_id => $plugin_definition) {
       /** @var $plugin \Drupal\Core\Menu\ContextualLinkInterface */
@@ -176,14 +176,14 @@ public function getContextualLinksArrayByGroup($group_name, array $route_paramet
         continue;
       }
 
-      $links[$plugin_id] = array(
+      $links[$plugin_id] = [
         'route_name' => $route_name,
         'route_parameters' => $route_parameters,
         'title' => $plugin->getTitle($request),
         'weight' => $plugin->getWeight(),
         'localized_options' => $plugin->getOptions(),
         'metadata' => $metadata,
-      );
+      ];
     }
 
     $this->moduleHandler->alter('contextual_links', $links, $group_name, $route_parameters);
diff --git a/core/lib/Drupal/Core/Menu/ContextualLinkManagerInterface.php b/core/lib/Drupal/Core/Menu/ContextualLinkManagerInterface.php
index 9e294364ec5215f4a9bb946945168d98876665f0..12f0275584c26c5d40986beb515a51f84eb0c0ca 100644
--- a/core/lib/Drupal/Core/Menu/ContextualLinkManagerInterface.php
+++ b/core/lib/Drupal/Core/Menu/ContextualLinkManagerInterface.php
@@ -41,6 +41,6 @@ public function getContextualLinkPluginsByGroup($group_name);
    *       to the link generator.
    *     - metadata: The array of additional metadata that was passed in.
    */
-  public function getContextualLinksArrayByGroup($group_name, array $route_parameters, array $metadata = array());
+  public function getContextualLinksArrayByGroup($group_name, array $route_parameters, array $metadata = []);
 
 }
diff --git a/core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php b/core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php
index c74e38083ff455899bb4dac2c7fc39d18ec1a62a..7eefd12754ad072f6d34f34d7de763c257c9e243 100644
--- a/core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php
+++ b/core/lib/Drupal/Core/Menu/DefaultMenuLinkTreeManipulators.php
@@ -130,7 +130,7 @@ public function checkAccess(array $tree) {
    *   The manipulated menu link tree.
    */
   public function checkNodeAccess(array $tree) {
-    $node_links = array();
+    $node_links = [];
     $this->collectNodeLinks($tree, $node_links);
     if ($node_links) {
       $nids = array_keys($node_links);
@@ -225,7 +225,7 @@ protected function menuLinkCheckAccess(MenuLinkInterface $instance) {
    *   The manipulated menu link tree.
    */
   public function generateIndexAndSort(array $tree) {
-    $new_tree = array();
+    $new_tree = [];
     foreach ($tree as $key => $v) {
       if ($tree[$key]->subtree) {
         $tree[$key]->subtree = $this->generateIndexAndSort($tree[$key]->subtree);
@@ -255,7 +255,7 @@ public function flatten(array $tree) {
       if ($tree[$key]->subtree) {
         $tree += $this->flatten($tree[$key]->subtree);
       }
-      $tree[$key]->subtree = array();
+      $tree[$key]->subtree = [];
     }
     return $tree;
   }
diff --git a/core/lib/Drupal/Core/Menu/Form/MenuLinkDefaultForm.php b/core/lib/Drupal/Core/Menu/Form/MenuLinkDefaultForm.php
index e7c04e370d60028cc6c0bac61c5b3a26131047b0..17031199e1029bb39fdb30072a037054e4c45b7b 100644
--- a/core/lib/Drupal/Core/Menu/Form/MenuLinkDefaultForm.php
+++ b/core/lib/Drupal/Core/Menu/Form/MenuLinkDefaultForm.php
@@ -98,41 +98,41 @@ public function setMenuLinkInstance(MenuLinkInterface $menu_link) {
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['#title'] = $this->t('Edit menu link %title', array('%title' => $this->menuLink->getTitle()));
+    $form['#title'] = $this->t('Edit menu link %title', ['%title' => $this->menuLink->getTitle()]);
 
     $provider = $this->menuLink->getProvider();
-    $form['info'] = array(
+    $form['info'] = [
       '#type' => 'item',
-      '#title' => $this->t('This link is provided by the @name module. The title and path cannot be edited.', array('@name' => $this->moduleHandler->getName($provider))),
-    );
-    $form['id'] = array(
+      '#title' => $this->t('This link is provided by the @name module. The title and path cannot be edited.', ['@name' => $this->moduleHandler->getName($provider)]),
+    ];
+    $form['id'] = [
       '#type' => 'value',
       '#value' => $this->menuLink->getPluginId(),
-    );
-    $link = array(
+    ];
+    $link = [
       '#type' => 'link',
       '#title' => $this->menuLink->getTitle(),
       '#url' => $this->menuLink->getUrlObject(),
-    );
-    $form['path'] = array(
+    ];
+    $form['path'] = [
       'link' => $link,
       '#type' => 'item',
       '#title' => $this->t('Link'),
-    );
+    ];
 
-    $form['enabled'] = array(
+    $form['enabled'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Enable menu link'),
       '#description' => $this->t('Menu links that are not enabled will not be listed in any menu.'),
       '#default_value' => $this->menuLink->isEnabled(),
-    );
+    ];
 
-    $form['expanded'] = array(
+    $form['expanded'] = [
       '#type' => 'checkbox',
       '#title' => t('Show as expanded'),
       '#description' => $this->t('If selected and this menu link has children, the menu will always appear expanded.'),
       '#default_value' => $this->menuLink->isExpanded(),
-    );
+    ];
 
     $menu_parent = $this->menuLink->getMenuName() . ':' . $this->menuLink->getParent();
     $form['menu_parent'] = $this->menuParentSelector->parentSelectElement($menu_parent, $this->menuLink->getPluginId());
@@ -141,14 +141,14 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $form['menu_parent']['#attributes']['class'][] = 'menu-title-select';
 
     $delta = max(abs($this->menuLink->getWeight()), 50);
-    $form['weight'] = array(
+    $form['weight'] = [
       '#type' => 'number',
       '#min' => -$delta,
       '#max' => $delta,
       '#default_value' => $this->menuLink->getWeight(),
       '#title' => $this->t('Weight'),
       '#description' => $this->t('Link weight among links in the same menu at the same depth. In the menu, the links with high weight will sink and links with a low weight will be positioned nearer the top.'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/lib/Drupal/Core/Menu/LocalActionDefault.php b/core/lib/Drupal/Core/Menu/LocalActionDefault.php
index bfa088e0adb924b5017fad705f6dda693cef4990..ab562e6ddb4c8dee3c195d024c872c083559106d 100644
--- a/core/lib/Drupal/Core/Menu/LocalActionDefault.php
+++ b/core/lib/Drupal/Core/Menu/LocalActionDefault.php
@@ -83,7 +83,7 @@ public function getWeight() {
    * {@inheritdoc}
    */
   public function getRouteParameters(RouteMatchInterface $route_match) {
-    $parameters = isset($this->pluginDefinition['route_parameters']) ? $this->pluginDefinition['route_parameters'] : array();
+    $parameters = isset($this->pluginDefinition['route_parameters']) ? $this->pluginDefinition['route_parameters'] : [];
     $route = $this->routeProvider->getRouteByName($this->getRouteName());
     $variables = $route->compile()->getVariables();
 
diff --git a/core/lib/Drupal/Core/Menu/LocalActionManager.php b/core/lib/Drupal/Core/Menu/LocalActionManager.php
index 924af7c4a91eec1ebd3c3046b40ce1dccea0c5f9..f262d4724d7bba93cf682b723bca27febfd01cac 100644
--- a/core/lib/Drupal/Core/Menu/LocalActionManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalActionManager.php
@@ -28,7 +28,7 @@ class LocalActionManager extends DefaultPluginManager implements LocalActionMana
    *
    * @var array
    */
-  protected $defaults = array(
+  protected $defaults = [
     // The plugin id. Set by the plugin system based on the top-level YAML key.
     'id' => NULL,
     // The static title for the local action.
@@ -38,14 +38,14 @@ class LocalActionManager extends DefaultPluginManager implements LocalActionMana
     // (Required) the route name used to generate a link.
     'route_name' => NULL,
     // Default route parameters for generating links.
-    'route_parameters' => array(),
+    'route_parameters' => [],
     // Associative array of link options.
-    'options' => array(),
+    'options' => [],
     // The route names where this local action appears.
-    'appears_on' => array(),
+    'appears_on' => [],
     // Default class for local action implementations.
     'class' => 'Drupal\Core\Menu\LocalActionDefault',
-  );
+  ];
 
   /**
    * A controller resolver object.
@@ -94,7 +94,7 @@ class LocalActionManager extends DefaultPluginManager implements LocalActionMana
    *
    * @var \Drupal\Core\Menu\LocalActionInterface[]
    */
-  protected $instances = array();
+  protected $instances = [];
 
   /**
    * Constructs a LocalActionManager object.
@@ -130,7 +130,7 @@ public function __construct(ControllerResolverInterface $controller_resolver, Re
     $this->moduleHandler = $module_handler;
     $this->account = $account;
     $this->alterInfo('menu_local_actions');
-    $this->setCacheBackend($cache_backend, 'local_action_plugins:' . $language_manager->getCurrentLanguage()->getId(), array('local_action'));
+    $this->setCacheBackend($cache_backend, 'local_action_plugins:' . $language_manager->getCurrentLanguage()->getId(), ['local_action']);
   }
 
   /**
@@ -149,7 +149,7 @@ protected function getDiscovery() {
    * {@inheritdoc}
    */
   public function getTitle(LocalActionInterface $local_action) {
-    $controller = array($local_action, 'getTitle');
+    $controller = [$local_action, 'getTitle'];
     $arguments = $this->controllerResolver->getArguments($this->requestStack->getCurrentRequest(), $controller);
     return call_user_func_array($controller, $arguments);
   }
@@ -159,8 +159,8 @@ public function getTitle(LocalActionInterface $local_action) {
    */
   public function getActionsForRoute($route_appears) {
     if (!isset($this->instances[$route_appears])) {
-      $route_names = array();
-      $this->instances[$route_appears] = array();
+      $route_names = [];
+      $this->instances[$route_appears] = [];
       // @todo - optimize this lookup by compiling or caching.
       foreach ($this->getDefinitions() as $plugin_id => $action_info) {
         if (in_array($route_appears, $action_info['appears_on'])) {
@@ -175,23 +175,23 @@ public function getActionsForRoute($route_appears) {
         $this->routeProvider->getRoutesByNames($route_names);
       }
     }
-    $links = array();
+    $links = [];
     /** @var $plugin \Drupal\Core\Menu\LocalActionInterface */
     foreach ($this->instances[$route_appears] as $plugin_id => $plugin) {
       $cacheability = new CacheableMetadata();
       $route_name = $plugin->getRouteName();
       $route_parameters = $plugin->getRouteParameters($this->routeMatch);
       $access = $this->accessManager->checkNamedRoute($route_name, $route_parameters, $this->account, TRUE);
-      $links[$plugin_id] = array(
+      $links[$plugin_id] = [
         '#theme' => 'menu_local_action',
-        '#link' => array(
+        '#link' => [
           'title' => $this->getTitle($plugin),
           'url' => Url::fromRoute($route_name, $route_parameters),
           'localized_options' => $plugin->getOptions($this->routeMatch),
-        ),
+        ],
         '#access' => $access,
         '#weight' => $plugin->getWeight(),
-      );
+      ];
       $cacheability->addCacheableDependency($access)->addCacheableDependency($plugin);
       $cacheability->applyTo($links[$plugin_id]);
     }
diff --git a/core/lib/Drupal/Core/Menu/LocalTaskDefault.php b/core/lib/Drupal/Core/Menu/LocalTaskDefault.php
index 38534b11994b76fdaec00f78fce44f26c052f240..30fba4fb43fcb2f5c4f2e1d9a356edf86e449c29 100644
--- a/core/lib/Drupal/Core/Menu/LocalTaskDefault.php
+++ b/core/lib/Drupal/Core/Menu/LocalTaskDefault.php
@@ -41,7 +41,7 @@ public function getRouteName() {
    * {@inheritdoc}
    */
   public function getRouteParameters(RouteMatchInterface $route_match) {
-    $parameters = isset($this->pluginDefinition['route_parameters']) ? $this->pluginDefinition['route_parameters'] : array();
+    $parameters = isset($this->pluginDefinition['route_parameters']) ? $this->pluginDefinition['route_parameters'] : [];
     $route = $this->routeProvider()->getRouteByName($this->getRouteName());
     $variables = $route->compile()->getVariables();
 
diff --git a/core/lib/Drupal/Core/Menu/LocalTaskManager.php b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
index 26b2ed5b164c8d73778fe727cce1fb356f74c213..c14d1de1a32262c79417a58e37b66c42bb3d93bf 100644
--- a/core/lib/Drupal/Core/Menu/LocalTaskManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
@@ -29,11 +29,11 @@ class LocalTaskManager extends DefaultPluginManager implements LocalTaskManagerI
   /**
    * {@inheritdoc}
    */
-  protected $defaults = array(
+  protected $defaults = [
     // (required) The name of the route this task links to.
     'route_name' => '',
     // Parameters for route variables when generating a link.
-    'route_parameters' => array(),
+    'route_parameters' => [],
     // The static title for the local task.
     'title' => '',
     // The route name where the root tab appears.
@@ -43,12 +43,12 @@ class LocalTaskManager extends DefaultPluginManager implements LocalTaskManagerI
     // The weight of the tab.
     'weight' => NULL,
     // The default link options.
-    'options' => array(),
+    'options' => [],
     // Default class for local task implementations.
     'class' => 'Drupal\Core\Menu\LocalTaskDefault',
     // The plugin id. Set by the plugin system based on the top-level YAML key.
     'id' => '',
-  );
+  ];
 
   /**
    * A controller resolver object.
@@ -76,7 +76,7 @@ class LocalTaskManager extends DefaultPluginManager implements LocalTaskManagerI
    *
    * @var array
    */
-  protected $instances = array();
+  protected $instances = [];
 
   /**
    * The local task render arrays for the current route.
@@ -138,7 +138,7 @@ public function __construct(ControllerResolverInterface $controller_resolver, Re
     $this->account = $account;
     $this->moduleHandler = $module_handler;
     $this->alterInfo('local_tasks');
-    $this->setCacheBackend($cache, 'local_task_plugins:' . $language_manager->getCurrentLanguage()->getId(), array('local_task'));
+    $this->setCacheBackend($cache, 'local_task_plugins:' . $language_manager->getCurrentLanguage()->getId(), ['local_task']);
   }
 
   /**
@@ -168,7 +168,7 @@ public function processDefinition(&$definition, $plugin_id) {
    * {@inheritdoc}
    */
   public function getTitle(LocalTaskInterface $local_task) {
-    $controller = array($local_task, 'getTitle');
+    $controller = [$local_task, 'getTitle'];
     $request = $this->requestStack->getCurrentRequest();
     $arguments = $this->controllerResolver->getArguments($request, $controller);
     return call_user_func_array($controller, $arguments);
@@ -196,7 +196,7 @@ public function getDefinitions() {
    */
   public function getLocalTasksForRoute($route_name) {
     if (!isset($this->instances[$route_name])) {
-      $this->instances[$route_name] = array();
+      $this->instances[$route_name] = [];
       if ($cache = $this->cacheBackend->get($this->cacheKey . ':' . $route_name)) {
         $base_routes = $cache->data['base_routes'];
         $parents = $cache->data['parents'];
@@ -206,9 +206,9 @@ public function getLocalTasksForRoute($route_name) {
         $definitions = $this->getDefinitions();
         // We build the hierarchy by finding all tabs that should
         // appear on the current route.
-        $base_routes = array();
-        $parents = array();
-        $children = array();
+        $base_routes = [];
+        $parents = [];
+        $children = [];
         foreach ($definitions as $plugin_id => $task_info) {
           // Fill in the base_route from the parent to insure consistency.
           if (!empty($task_info['parent_id']) && !empty($definitions[$task_info['parent_id']])) {
@@ -242,11 +242,11 @@ public function getLocalTasksForRoute($route_name) {
             }
           }
         }
-        $data = array(
+        $data = [
           'base_routes' => $base_routes,
           'parents' => $parents,
           'children' => $children,
-        );
+        ];
         $this->cacheBackend->set($this->cacheKey . ':' . $route_name, $data, Cache::PERMANENT, $this->cacheTags);
       }
       // Create a plugin instance for each element of the hierarchy.
@@ -288,10 +288,10 @@ public function getLocalTasksForRoute($route_name) {
    */
   public function getTasksBuild($current_route_name, RefinableCacheableDependencyInterface &$cacheability) {
     $tree = $this->getLocalTasksForRoute($current_route_name);
-    $build = array();
+    $build = [];
 
     // Collect all route names.
-    $route_names = array();
+    $route_names = [];
     foreach ($tree as $instances) {
       foreach ($instances as $child) {
         $route_names[] = $child->getRouteName();
diff --git a/core/lib/Drupal/Core/Menu/MenuActiveTrail.php b/core/lib/Drupal/Core/Menu/MenuActiveTrail.php
index b99a0e48c316dc114eefdb6eed513441159f441f..353a8143d9117753a89641fc94494843e42f1153 100644
--- a/core/lib/Drupal/Core/Menu/MenuActiveTrail.php
+++ b/core/lib/Drupal/Core/Menu/MenuActiveTrail.php
@@ -98,7 +98,7 @@ public function getActiveTrailIds($menu_name) {
   protected function doGetActiveTrailIds($menu_name) {
     // Parent ids; used both as key and value to ensure uniqueness.
     // We always want all the top-level links with parent == ''.
-    $active_trail = array('' => '');
+    $active_trail = ['' => ''];
 
     // If a link in the given menu indeed matches the route, then use it to
     // complete the active trail.
diff --git a/core/lib/Drupal/Core/Menu/MenuLinkBase.php b/core/lib/Drupal/Core/Menu/MenuLinkBase.php
index 760ced22bbef3e6eb6e6da843b68c8735612e13a..c61b5db0aa0b902537c29528de3251e887892c8b 100644
--- a/core/lib/Drupal/Core/Menu/MenuLinkBase.php
+++ b/core/lib/Drupal/Core/Menu/MenuLinkBase.php
@@ -19,7 +19,7 @@ abstract class MenuLinkBase extends PluginBase implements MenuLinkInterface {
    *
    * @var array
    */
-  protected $overrideAllowed = array();
+  protected $overrideAllowed = [];
 
   /**
    * {@inheritdoc}
@@ -92,14 +92,14 @@ public function isDeletable() {
    * {@inheritdoc}
    */
   public function getOptions() {
-    return $this->pluginDefinition['options'] ?: array();
+    return $this->pluginDefinition['options'] ?: [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getMetaData() {
-    return $this->pluginDefinition['metadata'] ?: array();
+    return $this->pluginDefinition['metadata'] ?: [];
   }
 
   /**
@@ -113,7 +113,7 @@ public function getRouteName() {
    * {@inheritdoc}
    */
   public function getRouteParameters() {
-    return isset($this->pluginDefinition['route_parameters']) ? $this->pluginDefinition['route_parameters'] : array();
+    return isset($this->pluginDefinition['route_parameters']) ? $this->pluginDefinition['route_parameters'] : [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Menu/MenuLinkDefault.php b/core/lib/Drupal/Core/Menu/MenuLinkDefault.php
index 0dda7e167561c61caa81ca83571814e1ad8c9a91..80a02cdb76caab25fcc9955b6e9cba3a9d60058c 100644
--- a/core/lib/Drupal/Core/Menu/MenuLinkDefault.php
+++ b/core/lib/Drupal/Core/Menu/MenuLinkDefault.php
@@ -13,13 +13,13 @@ class MenuLinkDefault extends MenuLinkBase implements ContainerFactoryPluginInte
   /**
    * {@inheritdoc}
    */
-  protected $overrideAllowed = array(
+  protected $overrideAllowed = [
     'menu_name' => 1,
     'parent' => 1,
     'weight' => 1,
     'expanded' => 1,
     'enabled' => 1,
-  );
+  ];
 
   /**
    * The static menu link service used to store updates to weight/parent etc.
diff --git a/core/lib/Drupal/Core/Menu/MenuLinkManager.php b/core/lib/Drupal/Core/Menu/MenuLinkManager.php
index 15b2e4d7c0a31ac578f9c21c1622e5dec15440c6..e9cd165be95a01a1f873dcb97074f1b1b6ab4b1e 100644
--- a/core/lib/Drupal/Core/Menu/MenuLinkManager.php
+++ b/core/lib/Drupal/Core/Menu/MenuLinkManager.php
@@ -26,13 +26,13 @@ class MenuLinkManager implements MenuLinkManagerInterface {
    *
    * @var array
    */
-  protected $defaults = array(
+  protected $defaults = [
     // (required) The name of the menu for this link.
     'menu_name' => 'tools',
     // (required) The name of the route this links to, unless it's external.
     'route_name' => '',
     // Parameters for route variables when generating a link.
-    'route_parameters' => array(),
+    'route_parameters' => [],
     // The external URL if this link has one (required if route_name is empty).
     'url' => '',
     // The static title for the menu link. If this came from a YAML definition
@@ -46,18 +46,18 @@ class MenuLinkManager implements MenuLinkManagerInterface {
     // The weight of the link.
     'weight' => 0,
     // The default link options.
-    'options' => array(),
+    'options' => [],
     'expanded' => 0,
     'enabled' => 1,
     // The name of the module providing this link.
     'provider' => '',
-    'metadata' => array(),
+    'metadata' => [],
     // Default class for local task implementations.
     'class' => 'Drupal\Core\Menu\MenuLinkDefault',
     'form_class' => 'Drupal\Core\Menu\Form\MenuLinkDefaultForm',
     // The plugin ID. Set by the plugin system based on the top-level YAML key.
     'id' => '',
-  );
+  ];
 
   /**
    * The object that discovers plugins managed by this manager.
@@ -231,7 +231,7 @@ public function hasDefinition($plugin_id) {
    * @throws \Drupal\Component\Plugin\Exception\PluginException
    *   If the instance cannot be created, such as if the ID is invalid.
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     return $this->getFactory()->createInstance($plugin_id, $configuration);
   }
 
@@ -248,7 +248,7 @@ public function getInstance(array $options) {
    * {@inheritdoc}
    */
   public function deleteLinksInMenu($menu_name) {
-    foreach ($this->treeStorage->loadByProperties(array('menu_name' => $menu_name)) as $plugin_id => $definition) {
+    foreach ($this->treeStorage->loadByProperties(['menu_name' => $menu_name]) as $plugin_id => $definition) {
       $instance = $this->createInstance($plugin_id);
       if ($instance->isDeletable()) {
         $this->deleteInstance($instance, TRUE);
@@ -333,8 +333,8 @@ public function getChildIds($id) {
   /**
    * {@inheritdoc}
    */
-  public function loadLinksByRoute($route_name, array $route_parameters = array(), $menu_name = NULL) {
-    $instances = array();
+  public function loadLinksByRoute($route_name, array $route_parameters = [], $menu_name = NULL) {
+    $instances = [];
     $loaded = $this->treeStorage->loadByRoute($route_name, $route_parameters, $menu_name);
     foreach ($loaded as $plugin_id => $definition) {
       $instances[$plugin_id] = $this->createInstance($plugin_id);
diff --git a/core/lib/Drupal/Core/Menu/MenuLinkManagerInterface.php b/core/lib/Drupal/Core/Menu/MenuLinkManagerInterface.php
index c64c47f4278dcdd75e2904e77e0f1870ad1d47cf..d415570de63efad67c8801eed9c339b4ac1bee8a 100644
--- a/core/lib/Drupal/Core/Menu/MenuLinkManagerInterface.php
+++ b/core/lib/Drupal/Core/Menu/MenuLinkManagerInterface.php
@@ -72,7 +72,7 @@ public function removeDefinition($id, $persist = TRUE);
    * @return \Drupal\Core\Menu\MenuLinkInterface[]
    *   An array of instances keyed by plugin ID.
    */
-  public function loadLinksByRoute($route_name, array $route_parameters = array(), $menu_name = NULL);
+  public function loadLinksByRoute($route_name, array $route_parameters = [], $menu_name = NULL);
 
   /**
    * Adds a new menu link definition to the menu tree storage.
diff --git a/core/lib/Drupal/Core/Menu/MenuLinkTree.php b/core/lib/Drupal/Core/Menu/MenuLinkTree.php
index 72e8ee9dfc3e92ee5ae921dc9d48678eb7e1c687..8dd4c51c90cad1f313763105a6d53a87ff0dfc1b 100644
--- a/core/lib/Drupal/Core/Menu/MenuLinkTree.php
+++ b/core/lib/Drupal/Core/Menu/MenuLinkTree.php
@@ -107,7 +107,7 @@ public function load($menu_name, MenuTreeParameters $parameters) {
    *   An array containing the elements of a menu tree.
    */
   protected function createInstances(array $data_tree) {
-    $tree = array();
+    $tree = [];
     foreach ($data_tree as $key => $element) {
       $subtree = $this->createInstances($element['subtree']);
       // Build a MenuLinkTreeElement out of the menu tree link definition:
@@ -202,7 +202,7 @@ public function build(array $tree) {
    * @throws \DomainException
    */
   protected function buildItems(array $tree, CacheableMetadata &$tree_access_cacheability, CacheableMetadata &$tree_link_cacheability) {
-    $items = array();
+    $items = [];
 
     foreach ($tree as $data) {
       /** @var \Drupal\Core\Menu\MenuLinkInterface $link */
@@ -262,7 +262,7 @@ protected function buildItems(array $tree, CacheableMetadata &$tree_access_cache
       $element['title'] = $link->getTitle();
       $element['url'] = $link->getUrlObject();
       $element['url']->setOption('set_active_class', TRUE);
-      $element['below'] = $data->subtree ? $this->buildItems($data->subtree, $tree_access_cacheability, $tree_link_cacheability) : array();
+      $element['below'] = $data->subtree ? $this->buildItems($data->subtree, $tree_access_cacheability, $tree_link_cacheability) : [];
       if (isset($data->options)) {
         $element['url']->setOptions(NestedArray::mergeDeep($element['url']->getOptions(), $data->options));
       }
diff --git a/core/lib/Drupal/Core/Menu/MenuLinkTreeElement.php b/core/lib/Drupal/Core/Menu/MenuLinkTreeElement.php
index e7e12c42ba524838fc5082c49c3265b60cb1f196..f58dd913b246d426214a003b650c35d1dcd84ada 100644
--- a/core/lib/Drupal/Core/Menu/MenuLinkTreeElement.php
+++ b/core/lib/Drupal/Core/Menu/MenuLinkTreeElement.php
@@ -79,7 +79,7 @@ class MenuLinkTreeElement {
    * \Drupal\Core\Menu\MenuLinkInterface::getOptions(), to allow menu link tree
    * manipulators to add or override link options.
    */
-  public $options = array();
+  public $options = [];
 
   /**
    * Constructs a new \Drupal\Core\Menu\MenuLinkTreeElement.
diff --git a/core/lib/Drupal/Core/Menu/MenuParentFormSelector.php b/core/lib/Drupal/Core/Menu/MenuParentFormSelector.php
index b112104b316409b83b0b0b45190eef53f471ff1a..8add3b06f9a95bbbb67aa77d02dbd4a1069a3d7e 100644
--- a/core/lib/Drupal/Core/Menu/MenuParentFormSelector.php
+++ b/core/lib/Drupal/Core/Menu/MenuParentFormSelector.php
@@ -54,7 +54,7 @@ public function getParentSelectOptions($id = '', array $menus = NULL, CacheableM
       $menus = $this->getMenuOptions();
     }
 
-    $options = array();
+    $options = [];
     $depth_limit = $this->getParentDepthLimit($id);
     foreach ($menus as $menu_name => $menu_title) {
       $options[$menu_name . ':'] = '<' . $menu_title . '>';
@@ -62,11 +62,11 @@ public function getParentSelectOptions($id = '', array $menus = NULL, CacheableM
       $parameters = new MenuTreeParameters();
       $parameters->setMaxDepth($depth_limit);
       $tree = $this->menuLinkTree->load($menu_name, $parameters);
-      $manipulators = array(
-        array('callable' => 'menu.default_tree_manipulators:checkNodeAccess'),
-        array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-        array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
-      );
+      $manipulators = [
+        ['callable' => 'menu.default_tree_manipulators:checkNodeAccess'],
+        ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+        ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+      ];
       $tree = $this->menuLinkTree->transform($tree, $manipulators);
       $this->parentSelectOptionsTreeWalk($tree, $menu_name, '--', $options, $id, $depth_limit, $cacheability);
     }
@@ -81,10 +81,10 @@ public function parentSelectElement($menu_parent, $id = '', array $menus = NULL)
     $options = $this->getParentSelectOptions($id, $menus, $options_cacheability);
     // If no options were found, there is nothing to select.
     if ($options) {
-      $element = array(
+      $element = [
         '#type' => 'select',
         '#options' => $options,
-      );
+      ];
       if (!isset($options[$menu_parent])) {
         // The requested menu parent cannot be found in the menu anymore. Try
         // setting it to the top level in the current menu.
@@ -93,12 +93,12 @@ public function parentSelectElement($menu_parent, $id = '', array $menus = NULL)
       }
       if (isset($options[$menu_parent])) {
         // Only provide the default value if it is valid among the options.
-        $element += array('#default_value' => $menu_parent);
+        $element += ['#default_value' => $menu_parent];
       }
       $options_cacheability->applyTo($element);
       return $element;
     }
-    return array();
+    return [];
   }
 
   /**
@@ -183,7 +183,7 @@ protected function parentSelectOptionsTreeWalk(array $tree, $menu_name, $indent,
    */
   protected function getMenuOptions(array $menu_names = NULL) {
     $menus = $this->entityManager->getStorage('menu')->loadMultiple($menu_names);
-    $options = array();
+    $options = [];
     /** @var \Drupal\system\MenuInterface[] $menus */
     foreach ($menus as $menu) {
       $options[$menu->id()] = $menu->label();
diff --git a/core/lib/Drupal/Core/Menu/MenuTreeParameters.php b/core/lib/Drupal/Core/Menu/MenuTreeParameters.php
index cb2107328331c9a58ca13f0ba9639af20da71bfc..702dcb4978a888cc261c185c1a40738ef39b7119 100644
--- a/core/lib/Drupal/Core/Menu/MenuTreeParameters.php
+++ b/core/lib/Drupal/Core/Menu/MenuTreeParameters.php
@@ -50,7 +50,7 @@ class MenuTreeParameters {
    *
    * @var string[]
    */
-  public $expandedParents = array();
+  public $expandedParents = [];
 
   /**
    * The IDs from the currently active menu link to the root of the whole tree.
@@ -62,7 +62,7 @@ class MenuTreeParameters {
    *
    * @var string[]
    */
-  public $activeTrail = array();
+  public $activeTrail = [];
 
   /**
    * The conditions used to restrict which links are loaded.
@@ -71,7 +71,7 @@ class MenuTreeParameters {
    *
    * @var array
    */
-  public $conditions = array();
+  public $conditions = [];
 
   /**
    * Sets a root for menu tree loading.
@@ -170,7 +170,7 @@ public function addCondition($definition_field, $value, $operator = NULL) {
       $this->conditions[$definition_field] = $value;
     }
     else {
-      $this->conditions[$definition_field] = array($value, $operator);
+      $this->conditions[$definition_field] = [$value, $operator];
     }
     return $this;
   }
diff --git a/core/lib/Drupal/Core/Menu/MenuTreeStorage.php b/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
index 3cd0b8c6612243579d56b9aab112511430fdb2d1..0b11f868837f24107fe2632848ab507db39012ce 100644
--- a/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
+++ b/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
@@ -55,7 +55,7 @@ class MenuTreeStorage implements MenuTreeStorageInterface {
    *
    * @var array
    */
-  protected $options = array();
+  protected $options = [];
 
   /**
    * Stores definitions that have already been loaded for better performance.
@@ -64,7 +64,7 @@ class MenuTreeStorage implements MenuTreeStorageInterface {
    *
    * @var array
    */
-  protected $definitions = array();
+  protected $definitions = [];
 
   /**
    * List of serialized fields.
@@ -83,7 +83,7 @@ class MenuTreeStorage implements MenuTreeStorageInterface {
    *
    * @var array
    */
-  protected $definitionFields = array(
+  protected $definitionFields = [
     'menu_name',
     'route_name',
     'route_parameters',
@@ -100,7 +100,7 @@ class MenuTreeStorage implements MenuTreeStorageInterface {
     'class',
     'form_class',
     'id',
-  );
+  ];
 
   /**
    * Constructs a new \Drupal\Core\Menu\MenuTreeStorage.
@@ -116,7 +116,7 @@ class MenuTreeStorage implements MenuTreeStorageInterface {
    * @param array $options
    *   (optional) Any additional database connection options to use in queries.
    */
-  public function __construct(Connection $connection, CacheBackendInterface $menu_cache_backend, CacheTagsInvalidatorInterface $cache_tags_invalidator, $table, array $options = array()) {
+  public function __construct(Connection $connection, CacheBackendInterface $menu_cache_backend, CacheTagsInvalidatorInterface $cache_tags_invalidator, $table, array $options = []) {
     $this->connection = $connection;
     $this->menuCacheBackend = $menu_cache_backend;
     $this->cacheTagsInvalidator = $cache_tags_invalidator;
@@ -135,16 +135,16 @@ public function maxDepth() {
    * {@inheritdoc}
    */
   public function resetDefinitions() {
-    $this->definitions = array();
+    $this->definitions = [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function rebuild(array $definitions) {
-    $links = array();
-    $children = array();
-    $top_links = array();
+    $links = [];
+    $children = [];
+    $top_links = [];
     // Fetch the list of existing menus, in case some are not longer populated
     // after the rebuild.
     $before_menus = $this->getMenuNames();
@@ -214,7 +214,7 @@ protected function purgeMultiple(array $ids) {
     $loaded = $this->loadFullMultiple($ids);
     foreach ($loaded as $id => $link) {
       if ($link['has_children']) {
-        $children = $this->loadByProperties(array('parent' => $id));
+        $children = $this->loadByProperties(['parent' => $id]);
         foreach ($children as $child) {
           $child['parent'] = $link['parent'];
           $this->save($child);
@@ -286,7 +286,7 @@ protected function doSave(array $link) {
     // @todo Should we just return here if the link values match the original
     //   values completely?
     //   https://www.drupal.org/node/2302137
-    $affected_menus = array();
+    $affected_menus = [];
 
     $transaction = $this->connection->startTransaction();
     try {
@@ -297,9 +297,9 @@ protected function doSave(array $link) {
       }
       else {
         // Generate a new mlid.
-        $options = array('return' => Database::RETURN_INSERT_ID) + $this->options;
+        $options = ['return' => Database::RETURN_INSERT_ID] + $this->options;
         $link['mlid'] = $this->connection->insert($this->table, $options)
-          ->fields(array('id' => $link['id'], 'menu_name' => $link['menu_name']))
+          ->fields(['id' => $link['id'], 'menu_name' => $link['menu_name']])
           ->execute();
       }
       $fields = $this->preSave($link, $original);
@@ -401,7 +401,7 @@ public function delete($id) {
     // It's possible the link is already deleted.
     if ($item) {
       $parent = $item['parent'];
-      $children = $this->loadByProperties(array('parent' => $id));
+      $children = $this->loadByProperties(['parent' => $id]);
       foreach ($children as $child) {
         $child['parent'] = $parent;
         $this->save($child);
@@ -512,18 +512,18 @@ protected function setParents(array &$fields, $parent, array $original) {
   protected function moveChildren($fields, $original) {
     $query = $this->connection->update($this->table, $this->options);
 
-    $query->fields(array('menu_name' => $fields['menu_name']));
+    $query->fields(['menu_name' => $fields['menu_name']]);
 
-    $expressions = array();
+    $expressions = [];
     for ($i = 1; $i <= $fields['depth']; $i++) {
-      $expressions[] = array("p$i", ":p_$i", array(":p_$i" => $fields["p$i"]));
+      $expressions[] = ["p$i", ":p_$i", [":p_$i" => $fields["p$i"]]];
     }
     $j = $original['depth'] + 1;
     while ($i <= $this->maxDepth() && $j <= $this->maxDepth()) {
-      $expressions[] = array('p' . $i++, 'p' . $j++, array());
+      $expressions[] = ['p' . $i++, 'p' . $j++, []];
     }
     while ($i <= $this->maxDepth()) {
-      $expressions[] = array('p' . $i++, 0, array());
+      $expressions[] = ['p' . $i++, 0, []];
     }
 
     $shift = $fields['depth'] - $original['depth'];
@@ -538,7 +538,7 @@ protected function moveChildren($fields, $original) {
       $query->expression($expression[0], $expression[1], $expression[2]);
     }
 
-    $query->expression('depth', 'depth + :depth', array(':depth' => $shift));
+    $query->expression('depth', 'depth + :depth', [':depth' => $shift]);
     $query->condition('menu_name', $original['menu_name']);
 
     for ($i = 1; $i <= $this->maxDepth() && $original["p$i"]; $i++) {
@@ -569,7 +569,7 @@ protected function findParent($link, $original) {
     }
 
     // If we have a parent link ID, try to use that.
-    $candidates = array();
+    $candidates = [];
     if (isset($link['parent'])) {
       $candidates[] = $link['parent'];
     }
@@ -607,7 +607,7 @@ protected function updateParentalStatus(array $link) {
 
       $parent_has_children = ((bool) $query->execute()->fetchField()) ? 1 : 0;
       $this->connection->update($this->table, $this->options)
-        ->fields(array('has_children' => $parent_has_children))
+        ->fields(['has_children' => $parent_has_children])
         ->condition('id', $link['parent'])
         ->execute();
     }
@@ -660,7 +660,7 @@ public function loadByProperties(array $properties) {
   /**
    * {@inheritdoc}
    */
-  public function loadByRoute($route_name, array $route_parameters = array(), $menu_name = NULL) {
+  public function loadByRoute($route_name, array $route_parameters = [], $menu_name = NULL) {
     // Sort the route parameters so that the query string will be the same.
     asort($route_parameters);
     // Since this will be urlencoded, it's safe to store and match against a
@@ -711,7 +711,7 @@ public function load($id) {
     if (isset($this->definitions[$id])) {
       return $this->definitions[$id];
     }
-    $loaded = $this->loadMultiple(array($id));
+    $loaded = $this->loadMultiple([$id]);
     return isset($loaded[$id]) ? $loaded[$id] : FALSE;
   }
 
@@ -725,8 +725,8 @@ public function load($id) {
    *   The loaded menu link definition or an empty array if not be found.
    */
   protected function loadFull($id) {
-    $loaded = $this->loadFullMultiple(array($id));
-    return isset($loaded[$id]) ? $loaded[$id] : array();
+    $loaded = $this->loadFullMultiple([$id]);
+    return isset($loaded[$id]) ? $loaded[$id] : [];
   }
 
   /**
@@ -761,20 +761,20 @@ public function getRootPathIds($id) {
     // @todo Consider making this dynamic based on static::MAX_DEPTH or from the
     //   schema if that is generated using static::MAX_DEPTH.
     //   https://www.drupal.org/node/2302043
-    $subquery->fields($this->table, array('p1', 'p2', 'p3', 'p4', 'p5', 'p6', 'p7', 'p8', 'p9'));
+    $subquery->fields($this->table, ['p1', 'p2', 'p3', 'p4', 'p5', 'p6', 'p7', 'p8', 'p9']);
     $subquery->condition('id', $id);
     $result = current($subquery->execute()->fetchAll(\PDO::FETCH_ASSOC));
     $ids = array_filter($result);
     if ($ids) {
       $query = $this->connection->select($this->table, $this->options);
-      $query->fields($this->table, array('id'));
+      $query->fields($this->table, ['id']);
       $query->orderBy('depth', 'DESC');
       $query->condition('mlid', $ids, 'IN');
       // @todo Cache this result in memory if we find it is being used more
       //   than once per page load. https://www.drupal.org/node/2302185
       return $this->safeExecuteSelect($query)->fetchAllKeyed(0, 0);
     }
-    return array();
+    return [];
   }
 
   /**
@@ -785,7 +785,7 @@ public function getExpanded($menu_name, array $parents) {
     //   expanded links? https://www.drupal.org/node/2302187
     do {
       $query = $this->connection->select($this->table, $this->options);
-      $query->fields($this->table, array('id'));
+      $query->fields($this->table, ['id']);
       $query->condition('menu_name', $menu_name);
       $query->condition('expanded', 1);
       $query->condition('has_children', 1);
@@ -843,7 +843,7 @@ public function loadTreeData($menu_name, MenuTreeParameters $parameters) {
     else {
       $links = $this->loadLinks($menu_name, $parameters);
       $data['tree'] = $this->doBuildTreeData($links, $parameters->activeTrail, $parameters->minDepth);
-      $data['definitions'] = array();
+      $data['definitions'] = [];
       $data['route_names'] = $this->collectRoutesAndDefinitions($data['tree'], $data['definitions']);
       $this->menuCacheBackend->set($tree_cid, $data, Cache::PERMANENT, ['config:system.menu.' . $menu_name]);
       // The definitions were already added to $this->definitions in
@@ -880,7 +880,7 @@ protected function loadLinks($menu_name, MenuTreeParameters $parameters) {
 
       // If the custom root does not exist, we cannot load the links below it.
       if (!$root) {
-        return array();
+        return [];
       }
 
       // When specifying a custom root, we only want to find links whose
@@ -986,7 +986,7 @@ protected function collectRoutesAndDefinitions(array $tree, array &$definitions)
    *   The collected route names.
    */
   protected function doCollectRoutesAndDefinitions(array $tree, array &$definitions) {
-    $route_names = array();
+    $route_names = [];
     foreach (array_keys($tree) as $id) {
       $definitions[$id] = $this->definitions[$id];
       if (!empty($definition['route_name'])) {
@@ -1003,7 +1003,7 @@ protected function doCollectRoutesAndDefinitions(array $tree, array &$definition
    * {@inheritdoc}
    */
   public function loadSubtreeData($id, $max_relative_depth = NULL) {
-    $tree = array();
+    $tree = [];
     $root = $this->loadFull($id);
     if (!$root) {
       return $tree;
@@ -1051,10 +1051,10 @@ public function countMenuLinks($menu_name = NULL) {
   public function getAllChildIds($id) {
     $root = $this->loadFull($id);
     if (!$root) {
-      return array();
+      return [];
     }
     $query = $this->connection->select($this->table, $this->options);
-    $query->fields($this->table, array('id'));
+    $query->fields($this->table, ['id']);
     $query->condition('menu_name', $root['menu_name']);
     for ($i = 1; $i <= $root['depth']; $i++) {
       $query->condition("p$i", $root["p$i"]);
@@ -1080,7 +1080,7 @@ public function loadAllChildren($id, $max_relative_depth = NULL) {
   /**
    * Prepares the data for calling $this->treeDataRecursive().
    */
-  protected function doBuildTreeData(array $links, array $parents = array(), $depth = 1) {
+  protected function doBuildTreeData(array $links, array $parents = [], $depth = 1) {
     // Reverse the array so we can use the more efficient array_pop() function.
     $links = array_reverse($links);
     return $this->treeDataRecursive($links, $parents, $depth);
@@ -1109,17 +1109,17 @@ protected function doBuildTreeData(array $links, array $parents = array(), $dept
    * @see \Drupal\Core\Menu\MenuTreeStorage::loadTreeData()
    */
   protected function treeDataRecursive(array &$links, array $parents, $depth) {
-    $tree = array();
+    $tree = [];
     while ($tree_link_definition = array_pop($links)) {
-      $tree[$tree_link_definition['id']] = array(
+      $tree[$tree_link_definition['id']] = [
         'definition' => $this->prepareLink($tree_link_definition, TRUE),
         'has_children' => $tree_link_definition['has_children'],
         // We need to determine if we're on the path to root so we can later
         // build the correct active trail.
         'in_active_trail' => in_array($tree_link_definition['id'], $parents),
-        'subtree' => array(),
+        'subtree' => [],
         'depth' => $tree_link_definition['depth'],
-      );
+      ];
       // Look ahead to the next link, but leave it on the array so it's
       // available to other recursive function calls if we return or build a
       // sub-tree.
@@ -1202,211 +1202,211 @@ protected function definitionFields() {
    *   The schema API definition for the SQL storage table.
    */
   protected static function schemaDefinition() {
-    $schema = array(
+    $schema = [
       'description' => 'Contains the menu tree hierarchy.',
-      'fields' => array(
-        'menu_name' => array(
+      'fields' => [
+        'menu_name' => [
           'description' => "The menu name. All links with the same menu name (such as 'tools') are part of the same menu.",
           'type' => 'varchar_ascii',
           'length' => 32,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'mlid' => array(
+        ],
+        'mlid' => [
           'description' => 'The menu link ID (mlid) is the integer primary key.',
           'type' => 'serial',
           'unsigned' => TRUE,
           'not null' => TRUE,
-        ),
-        'id' => array(
+        ],
+        'id' => [
           'description' => 'Unique machine name: the plugin ID.',
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
-        ),
-        'parent' => array(
+        ],
+        'parent' => [
           'description' => 'The plugin ID for the parent of this link.',
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'route_name' => array(
+        ],
+        'route_name' => [
           'description' => 'The machine name of a defined Symfony Route this menu item represents.',
           'type' => 'varchar_ascii',
           'length' => 255,
-        ),
-        'route_param_key' => array(
+        ],
+        'route_param_key' => [
           'description' => 'An encoded string of route parameters for loading by route.',
           'type' => 'varchar',
           'length' => 255,
-        ),
-        'route_parameters' => array(
+        ],
+        'route_parameters' => [
           'description' => 'Serialized array of route parameters of this menu link.',
           'type' => 'blob',
           'size' => 'big',
           'not null' => FALSE,
           'serialize' => TRUE,
-        ),
-        'url' => array(
+        ],
+        'url' => [
           'description' => 'The external path this link points to (when not using a route).',
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'title' => array(
+        ],
+        'title' => [
           'description' => 'The serialized title for the link. May be a TranslatableMarkup.',
           'type' => 'blob',
           'size' => 'big',
           'not null' => FALSE,
           'serialize' => TRUE,
-        ),
-        'description' => array(
+        ],
+        'description' => [
           'description' => 'The serialized description of this link - used for admin pages and title attribute. May be a TranslatableMarkup.',
           'type' => 'blob',
           'size' => 'big',
           'not null' => FALSE,
           'serialize' => TRUE,
-        ),
-        'class' => array(
+        ],
+        'class' => [
           'description' => 'The class for this link plugin.',
           'type' => 'text',
           'not null' => FALSE,
-        ),
-        'options' => array(
+        ],
+        'options' => [
           'description' => 'A serialized array of URL options, such as a query string or HTML attributes.',
           'type' => 'blob',
           'size' => 'big',
           'not null' => FALSE,
           'serialize' => TRUE,
-        ),
-        'provider' => array(
+        ],
+        'provider' => [
           'description' => 'The name of the module that generated this link.',
           'type' => 'varchar_ascii',
           'length' => DRUPAL_EXTENSION_NAME_MAX_LENGTH,
           'not null' => TRUE,
           'default' => 'system',
-        ),
-        'enabled' => array(
+        ],
+        'enabled' => [
           'description' => 'A flag for whether the link should be rendered in menus. (0 = a disabled menu item that may be shown on admin screens, 1 = a normal, visible link)',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 1,
           'size' => 'small',
-        ),
-        'discovered' => array(
+        ],
+        'discovered' => [
           'description' => 'A flag for whether the link was discovered, so can be purged on rebuild',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
           'size' => 'small',
-        ),
-        'expanded' => array(
+        ],
+        'expanded' => [
           'description' => 'Flag for whether this link should be rendered as expanded in menus - expanded links always have their child links displayed, instead of only when the link is in the active trail (1 = expanded, 0 = not expanded)',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
           'size' => 'small',
-        ),
-        'weight' => array(
+        ],
+        'weight' => [
           'description' => 'Link weight among links in the same menu at the same depth.',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'metadata' => array(
+        ],
+        'metadata' => [
           'description' => 'A serialized array of data that may be used by the plugin instance.',
           'type' => 'blob',
           'size' => 'big',
           'not null' => FALSE,
           'serialize' => TRUE,
-        ),
-        'has_children' => array(
+        ],
+        'has_children' => [
           'description' => 'Flag indicating whether any enabled links have this link as a parent (1 = enabled children exist, 0 = no enabled children).',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
           'size' => 'small',
-        ),
-        'depth' => array(
+        ],
+        'depth' => [
           'description' => 'The depth relative to the top level. A link with empty parent will have depth == 1.',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
           'size' => 'small',
-        ),
-        'p1' => array(
+        ],
+        'p1' => [
           'description' => 'The first mlid in the materialized path. If N = depth, then pN must equal the mlid. If depth > 1 then p(N-1) must equal the parent link mlid. All pX where X > depth must equal zero. The columns p1 .. p9 are also called the parents.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'p2' => array(
+        ],
+        'p2' => [
           'description' => 'The second mlid in the materialized path. See p1.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'p3' => array(
+        ],
+        'p3' => [
           'description' => 'The third mlid in the materialized path. See p1.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'p4' => array(
+        ],
+        'p4' => [
           'description' => 'The fourth mlid in the materialized path. See p1.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'p5' => array(
+        ],
+        'p5' => [
           'description' => 'The fifth mlid in the materialized path. See p1.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'p6' => array(
+        ],
+        'p6' => [
           'description' => 'The sixth mlid in the materialized path. See p1.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'p7' => array(
+        ],
+        'p7' => [
           'description' => 'The seventh mlid in the materialized path. See p1.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'p8' => array(
+        ],
+        'p8' => [
           'description' => 'The eighth mlid in the materialized path. See p1.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'p9' => array(
+        ],
+        'p9' => [
           'description' => 'The ninth mlid in the materialized path. See p1.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'form_class' => array(
+        ],
+        'form_class' => [
           'description' => 'meh',
           'type' => 'varchar',
           'length' => 255,
-        ),
-      ),
-      'indexes' => array(
-        'menu_parents' => array(
+        ],
+      ],
+      'indexes' => [
+        'menu_parents' => [
           'menu_name',
           'p1',
           'p2',
@@ -1417,24 +1417,24 @@ protected static function schemaDefinition() {
           'p7',
           'p8',
           'p9',
-        ),
+        ],
         // @todo Test this index for effectiveness.
         //   https://www.drupal.org/node/2302197
-        'menu_parent_expand_child' => array(
+        'menu_parent_expand_child' => [
           'menu_name', 'expanded',
           'has_children',
-          array('parent', 16),
-        ),
-        'route_values' => array(
-          array('route_name', 32),
-          array('route_param_key', 16),
-        ),
-      ),
-      'primary key' => array('mlid'),
-      'unique keys' => array(
-        'id' => array('id'),
-      ),
-    );
+          ['parent', 16],
+        ],
+        'route_values' => [
+          ['route_name', 32],
+          ['route_param_key', 16],
+        ],
+      ],
+      'primary key' => ['mlid'],
+      'unique keys' => [
+        'id' => ['id'],
+      ],
+    ];
 
     return $schema;
   }
@@ -1459,7 +1459,7 @@ protected function findNoLongerExistingLinks(array $definitions) {
       $result = $query->execute()->fetchCol();
     }
     else {
-      $result = array();
+      $result = [];
     }
     return $result;
   }
diff --git a/core/lib/Drupal/Core/Menu/MenuTreeStorageInterface.php b/core/lib/Drupal/Core/Menu/MenuTreeStorageInterface.php
index 0a580d64a391d3d72d7f9855b82205b7d14db1f2..0e36e13c40c63d6bf5e40da91c6d568d5b80756a 100644
--- a/core/lib/Drupal/Core/Menu/MenuTreeStorageInterface.php
+++ b/core/lib/Drupal/Core/Menu/MenuTreeStorageInterface.php
@@ -86,7 +86,7 @@ public function loadByProperties(array $properties);
    * @return array
    *   An array of menu link definitions keyed by ID and ordered by depth.
    */
-  public function loadByRoute($route_name, array $route_parameters = array(), $menu_name = NULL);
+  public function loadByRoute($route_name, array $route_parameters = [], $menu_name = NULL);
 
   /**
    * Saves a plugin definition to the storage.
diff --git a/core/lib/Drupal/Core/Menu/StaticMenuLinkOverrides.php b/core/lib/Drupal/Core/Menu/StaticMenuLinkOverrides.php
index a2d7591c7b335822b0a7e6b83cb7eb53a0c15618..07b7526bafbd40330a44470e209dd53e2daa305a 100644
--- a/core/lib/Drupal/Core/Menu/StaticMenuLinkOverrides.php
+++ b/core/lib/Drupal/Core/Menu/StaticMenuLinkOverrides.php
@@ -73,7 +73,7 @@ public function reload() {
   public function loadOverride($id) {
     $all_overrides = $this->getConfig()->get('definitions');
     $id = static::encodeId($id);
-    return $id && isset($all_overrides[$id]) ? $all_overrides[$id] : array();
+    return $id && isset($all_overrides[$id]) ? $all_overrides[$id] : [];
   }
 
   /**
@@ -99,16 +99,16 @@ public function deleteMultipleOverrides(array $ids) {
    * {@inheritdoc}
    */
   public function deleteOverride($id) {
-    return $this->deleteMultipleOverrides(array($id));
+    return $this->deleteMultipleOverrides([$id]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function loadMultipleOverrides(array $ids) {
-    $result = array();
+    $result = [];
     if ($ids) {
-      $all_overrides = $this->getConfig()->get('definitions') ?: array();
+      $all_overrides = $this->getConfig()->get('definitions') ?: [];
       foreach ($ids as $id) {
         $encoded_id = static::encodeId($id);
         if (isset($all_overrides[$encoded_id])) {
@@ -124,13 +124,13 @@ public function loadMultipleOverrides(array $ids) {
    */
   public function saveOverride($id, array $definition) {
     // Only allow to override a specific subset of the keys.
-    $expected = array(
+    $expected = [
       'menu_name' => '',
       'parent' => '',
       'weight' => 0,
       'expanded' => FALSE,
       'enabled' => FALSE,
-    );
+    ];
     // Filter the overrides to only those that are expected.
     $definition = array_intersect_key($definition, $expected);
     // Ensure all values are set.
@@ -173,7 +173,7 @@ public function getCacheTags() {
    *   The menu plugin ID with double underscore instead of dots.
    */
   protected static function encodeId($id) {
-    return strtr($id, array('.' => '__', '__' => '___'));
+    return strtr($id, ['.' => '__', '__' => '___']);
   }
 
 }
diff --git a/core/lib/Drupal/Core/Menu/menu.api.php b/core/lib/Drupal/Core/Menu/menu.api.php
index ddb56734eef863827f05bcf30713655093d2d2c8..12e85ee38ece6a9431dc1c19955aaf926acee150 100644
--- a/core/lib/Drupal/Core/Menu/menu.api.php
+++ b/core/lib/Drupal/Core/Menu/menu.api.php
@@ -268,12 +268,12 @@ function hook_menu_links_discovered_alter(&$links) {
   $links['user.logout']['title'] = new \Drupal\Core\StringTranslation\TranslatableMarkup('Logout');
   // Conditionally add an additional link with a title that's not translated.
   if (\Drupal::moduleHandler()->moduleExists('search')) {
-    $links['menu.api.search'] = array(
+    $links['menu.api.search'] = [
       'title' => \Drupal::config('system.site')->get('name'),
       'route_name' => 'menu.api.search',
       'description' => new \Drupal\Core\StringTranslation\TranslatableMarkup('View popular search phrases for this site.'),
       'parent' => 'system.admin_reports',
-    );
+    ];
   }
 }
 
@@ -308,18 +308,18 @@ function hook_menu_links_discovered_alter(&$links) {
 function hook_menu_local_tasks_alter(&$data, $route_name) {
 
   // Add a tab linking to node/add to all pages.
-  $data['tabs'][0]['node.add_page'] = array(
+  $data['tabs'][0]['node.add_page'] = [
       '#theme' => 'menu_local_task',
-      '#link' => array(
+      '#link' => [
           'title' => t('Example tab'),
           'url' => Url::fromRoute('node.add_page'),
-          'localized_options' => array(
-              'attributes' => array(
+          'localized_options' => [
+              'attributes' => [
                   'title' => t('Add content'),
-              ),
-          ),
-      ),
-  );
+              ],
+          ],
+      ],
+  ];
 }
 
 /**
@@ -391,7 +391,7 @@ function hook_contextual_links_alter(array &$links, $group, array $route_paramet
     // Dynamically use the menu name for the title of the menu_edit contextual
     // link.
     $menu = \Drupal::entityManager()->getStorage('menu')->load($route_parameters['menu']);
-    $links['menu_edit']['title'] = t('Edit menu: @label', array('@label' => $menu->label()));
+    $links['menu_edit']['title'] = t('Edit menu: @label', ['@label' => $menu->label()]);
   }
 }
 
diff --git a/core/lib/Drupal/Core/ParamConverter/EntityConverter.php b/core/lib/Drupal/Core/ParamConverter/EntityConverter.php
index 573cd49e780b7aa5eca2cd1622202be748ad209e..67f6a89c8e01d1e3c35d4ed0040554f8333cef5d 100644
--- a/core/lib/Drupal/Core/ParamConverter/EntityConverter.php
+++ b/core/lib/Drupal/Core/ParamConverter/EntityConverter.php
@@ -65,7 +65,7 @@ public function convert($value, $definition, $name, array $defaults) {
       // If the entity type is translatable, ensure we return the proper
       // translation object for the current context.
       if ($entity instanceof EntityInterface && $entity instanceof TranslatableInterface) {
-        $entity = $this->entityManager->getTranslationFromContext($entity, NULL, array('operation' => 'entity_upcast'));
+        $entity = $this->entityManager->getTranslationFromContext($entity, NULL, ['operation' => 'entity_upcast']);
       }
       return $entity;
     }
diff --git a/core/lib/Drupal/Core/ParamConverter/ParamConverterManager.php b/core/lib/Drupal/Core/ParamConverter/ParamConverterManager.php
index d54bd7fe18efe80f8f6deccf636b5e588a661d2e..cad7609c83bb663f3339b6dee8dd7b139170bdea 100644
--- a/core/lib/Drupal/Core/ParamConverter/ParamConverterManager.php
+++ b/core/lib/Drupal/Core/ParamConverter/ParamConverterManager.php
@@ -18,7 +18,7 @@ class ParamConverterManager implements ParamConverterManagerInterface {
    *
    * @var array
    */
-  protected $converters = array();
+  protected $converters = [];
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Path/AliasManager.php b/core/lib/Drupal/Core/Path/AliasManager.php
index 3a31917310d4aaaf19d36feb482a90d578aa6b19..6773e79835188570f2faebae284a94ff9e0321d5 100644
--- a/core/lib/Drupal/Core/Path/AliasManager.php
+++ b/core/lib/Drupal/Core/Path/AliasManager.php
@@ -52,14 +52,14 @@ class AliasManager implements AliasManagerInterface, CacheDecoratorInterface {
    *
    * @var array
    */
-  protected $lookupMap = array();
+  protected $lookupMap = [];
 
   /**
    * Holds an array of aliases for which no path was found.
    *
    * @var array
    */
-  protected $noPath = array();
+  protected $noPath = [];
 
   /**
    * Holds the array of whitelisted path aliases.
@@ -73,14 +73,14 @@ class AliasManager implements AliasManagerInterface, CacheDecoratorInterface {
    *
    * @var array
    */
-  protected $noAlias = array();
+  protected $noAlias = [];
 
   /**
    * Whether preloaded path lookups has already been loaded.
    *
    * @var array
    */
-  protected $langcodePreloaded = array();
+  protected $langcodePreloaded = [];
 
   /**
    * Holds an array of previously looked up paths for the current request path.
@@ -132,7 +132,7 @@ public function writeCache() {
     if ($this->cacheNeedsWriting && !empty($this->cacheKey)) {
       // Start with the preloaded path lookups, so that cached entries for other
       // languages will not be lost.
-      $path_lookups = $this->preloadedPathLookups ?: array();
+      $path_lookups = $this->preloadedPathLookups ?: [];
       foreach ($this->lookupMap as $langcode => $lookups) {
         $path_lookups[$langcode] = array_keys($lookups);
         if (!empty($this->noAlias[$langcode])) {
@@ -202,12 +202,12 @@ public function getAliasByPath($path, $langcode = NULL) {
     // paths for the page from cache.
     if (empty($this->langcodePreloaded[$langcode])) {
       $this->langcodePreloaded[$langcode] = TRUE;
-      $this->lookupMap[$langcode] = array();
+      $this->lookupMap[$langcode] = [];
 
       // Load the cached paths that should be used for preloading. This only
       // happens if a cache key has been set.
       if ($this->preloadedPathLookups === FALSE) {
-        $this->preloadedPathLookups = array();
+        $this->preloadedPathLookups = [];
         if ($this->cacheKey) {
           if ($cached = $this->cache->get($this->cacheKey)) {
             $this->preloadedPathLookups = $cached->data;
@@ -258,12 +258,12 @@ public function cacheClear($source = NULL) {
       }
     }
     else {
-      $this->lookupMap = array();
+      $this->lookupMap = [];
     }
-    $this->noPath = array();
-    $this->noAlias = array();
-    $this->langcodePreloaded = array();
-    $this->preloadedPathLookups = array();
+    $this->noPath = [];
+    $this->noAlias = [];
+    $this->langcodePreloaded = [];
+    $this->preloadedPathLookups = [];
     $this->cache->delete($this->cacheKey);
     $this->pathAliasWhitelistRebuild($source);
   }
diff --git a/core/lib/Drupal/Core/Path/AliasStorage.php b/core/lib/Drupal/Core/Path/AliasStorage.php
index 5379edad1d9d0cddc71a234d8e517fbb18ea1503..4f380125bbef36bd80e804ec47461add41105b87 100644
--- a/core/lib/Drupal/Core/Path/AliasStorage.php
+++ b/core/lib/Drupal/Core/Path/AliasStorage.php
@@ -63,11 +63,11 @@ public function save($source, $alias, $langcode = LanguageInterface::LANGCODE_NO
       throw new \InvalidArgumentException(sprintf('Alias path %s has to start with a slash.', $alias));
     }
 
-    $fields = array(
+    $fields = [
       'source' => $source,
       'alias' => $alias,
       'langcode' => $langcode,
-    );
+    ];
 
     // Insert or update the alias.
     if (empty($pid)) {
@@ -99,7 +99,7 @@ public function save($source, $alias, $langcode = LanguageInterface::LANGCODE_NO
       // Fetch the current values so that an update hook can identify what
       // exactly changed.
       try {
-        $original = $this->connection->query('SELECT source, alias, langcode FROM {url_alias} WHERE pid = :pid', array(':pid' => $pid))
+        $original = $this->connection->query('SELECT source, alias, langcode FROM {url_alias} WHERE pid = :pid', [':pid' => $pid])
           ->fetchAssoc();
       }
       catch (\Exception $e) {
@@ -116,7 +116,7 @@ public function save($source, $alias, $langcode = LanguageInterface::LANGCODE_NO
     }
     if ($pid) {
       // @todo Switch to using an event for this instead of a hook.
-      $this->moduleHandler->invokeAll('path_' . $operation, array($fields));
+      $this->moduleHandler->invokeAll('path_' . $operation, [$fields]);
       Cache::invalidateTags(['route_match']);
       return $fields;
     }
@@ -174,7 +174,7 @@ public function delete($conditions) {
       $deleted = FALSE;
     }
     // @todo Switch to using an event for this instead of a hook.
-    $this->moduleHandler->invokeAll('path_delete', array($path));
+    $this->moduleHandler->invokeAll('path_delete', [$path]);
     Cache::invalidateTags(['route_match']);
     return $deleted;
   }
@@ -313,7 +313,7 @@ public function aliasExists($alias, $langcode, $source = NULL) {
    */
   public function languageAliasExists() {
     try {
-      return (bool) $this->connection->queryRange('SELECT 1 FROM {url_alias} WHERE langcode <> :langcode', 0, 1, array(':langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED))->fetchField();
+      return (bool) $this->connection->queryRange('SELECT 1 FROM {url_alias} WHERE langcode <> :langcode', 0, 1, [':langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED])->fetchField();
     }
     catch (\Exception $e) {
       $this->catchException($e);
diff --git a/core/lib/Drupal/Core/Path/PathMatcher.php b/core/lib/Drupal/Core/Path/PathMatcher.php
index 2b616c2e4e7cd0ce50fa39b2ec4474eaae843d67..cc4f2cccfddeff7336235e4a4cfabea94db8a68a 100644
--- a/core/lib/Drupal/Core/Path/PathMatcher.php
+++ b/core/lib/Drupal/Core/Path/PathMatcher.php
@@ -66,19 +66,19 @@ public function matchPath($path, $patterns) {
 
     if (!isset($this->regexes[$patterns])) {
       // Convert path settings to a regular expression.
-      $to_replace = array(
+      $to_replace = [
         // Replace newlines with a logical 'or'.
         '/(\r\n?|\n)/',
         // Quote asterisks.
         '/\\\\\*/',
         // Quote <front> keyword.
         '/(^|\|)\\\\<front\\\\>($|\|)/',
-      );
-      $replacements = array(
+      ];
+      $replacements = [
         '|',
         '.*',
         '\1' . preg_quote($this->getFrontPagePath(), '/') . '\2',
-      );
+      ];
       $patterns_quoted = preg_quote($patterns, '/');
       $this->regexes[$patterns] = '/^(' . preg_replace($to_replace, $replacements, $patterns_quoted) . ')$/';
     }
diff --git a/core/lib/Drupal/Core/PathProcessor/NullPathProcessorManager.php b/core/lib/Drupal/Core/PathProcessor/NullPathProcessorManager.php
index 3718663a37b590e7dba9134ca4d7705c224ddfeb..9e6d3dae619871672fd4994e15617f2088027fdf 100644
--- a/core/lib/Drupal/Core/PathProcessor/NullPathProcessorManager.php
+++ b/core/lib/Drupal/Core/PathProcessor/NullPathProcessorManager.php
@@ -22,7 +22,7 @@ public function processInbound($path, Request $request) {
   /**
    * {@inheritdoc}
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
     return $path;
   }
 
diff --git a/core/lib/Drupal/Core/PathProcessor/OutboundPathProcessorInterface.php b/core/lib/Drupal/Core/PathProcessor/OutboundPathProcessorInterface.php
index db7d8969ae185ec0b311d7cc6f3dd43ce3b9fb22..a5e6570ebe4d89e99c09f448afccf4555f710b37 100644
--- a/core/lib/Drupal/Core/PathProcessor/OutboundPathProcessorInterface.php
+++ b/core/lib/Drupal/Core/PathProcessor/OutboundPathProcessorInterface.php
@@ -45,6 +45,6 @@ interface OutboundPathProcessorInterface {
    * @return string
    *   The processed path.
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL);
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL);
 
 }
diff --git a/core/lib/Drupal/Core/PathProcessor/PathProcessorAlias.php b/core/lib/Drupal/Core/PathProcessor/PathProcessorAlias.php
index a067b3d6b384a1ba59ac3d6584241e4bd8650b20..b85737f3cf13da873875959633c315fa93904bee 100644
--- a/core/lib/Drupal/Core/PathProcessor/PathProcessorAlias.php
+++ b/core/lib/Drupal/Core/PathProcessor/PathProcessorAlias.php
@@ -39,7 +39,7 @@ public function processInbound($path, Request $request) {
   /**
    * {@inheritdoc}
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
     if (empty($options['alias'])) {
       $langcode = isset($options['language']) ? $options['language']->getId() : NULL;
       $path = $this->aliasManager->getAliasByPath($path, $langcode);
diff --git a/core/lib/Drupal/Core/PathProcessor/PathProcessorFront.php b/core/lib/Drupal/Core/PathProcessor/PathProcessorFront.php
index a800842c763a4f660234ba86a6c20eafff0b9920..94ff1183ee3cf6d7cd617c23bcdece5e12c3e69c 100644
--- a/core/lib/Drupal/Core/PathProcessor/PathProcessorFront.php
+++ b/core/lib/Drupal/Core/PathProcessor/PathProcessorFront.php
@@ -49,7 +49,7 @@ public function processInbound($path, Request $request) {
   /**
    * {@inheritdoc}
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
     // The special path '<front>' links to the default front page.
     if ($path === '/<front>') {
       $path = '/';
diff --git a/core/lib/Drupal/Core/PathProcessor/PathProcessorManager.php b/core/lib/Drupal/Core/PathProcessor/PathProcessorManager.php
index f1987f807cb7318efc95b08fd50a31629db4bd2d..2a3181ee2edb75fb609e3ebb6c203deb3ec732d0 100644
--- a/core/lib/Drupal/Core/PathProcessor/PathProcessorManager.php
+++ b/core/lib/Drupal/Core/PathProcessor/PathProcessorManager.php
@@ -20,7 +20,7 @@ class PathProcessorManager implements InboundPathProcessorInterface, OutboundPat
    *   An array whose keys are priorities and whose values are arrays of path
    *   processor objects.
    */
-  protected $inboundProcessors = array();
+  protected $inboundProcessors = [];
 
   /**
    * Holds the array of inbound processors, sorted by priority.
@@ -28,7 +28,7 @@ class PathProcessorManager implements InboundPathProcessorInterface, OutboundPat
    * @var array
    *   An array of path processor objects.
    */
-  protected $sortedInbound = array();
+  protected $sortedInbound = [];
 
 
   /**
@@ -38,7 +38,7 @@ class PathProcessorManager implements InboundPathProcessorInterface, OutboundPat
    *   An array whose keys are priorities and whose values are arrays of path
    *   processor objects.
    */
-  protected $outboundProcessors = array();
+  protected $outboundProcessors = [];
 
   /**
    * Holds the array of outbound processors, sorted by priority.
@@ -46,7 +46,7 @@ class PathProcessorManager implements InboundPathProcessorInterface, OutboundPat
    * @var array
    *   An array of path processor objects.
    */
-  protected $sortedOutbound = array();
+  protected $sortedOutbound = [];
 
   /**
    * Adds an inbound processor object to the $inboundProcessors property.
@@ -58,7 +58,7 @@ class PathProcessorManager implements InboundPathProcessorInterface, OutboundPat
    */
   public function addInbound(InboundPathProcessorInterface $processor, $priority = 0) {
     $this->inboundProcessors[$priority][] = $processor;
-    $this->sortedInbound = array();
+    $this->sortedInbound = [];
   }
 
   /**
@@ -97,13 +97,13 @@ protected function getInbound() {
    */
   public function addOutbound(OutboundPathProcessorInterface $processor, $priority = 0) {
     $this->outboundProcessors[$priority][] = $processor;
-    $this->sortedOutbound = array();
+    $this->sortedOutbound = [];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
     $processors = $this->getOutbound();
     foreach ($processors as $processor) {
       $path = $processor->processOutbound($path, $options, $request, $bubbleable_metadata);
@@ -132,7 +132,7 @@ protected function getOutbound() {
    *   The processor type to sort, e.g. 'inboundProcessors'.
    */
   protected function sortProcessors($type) {
-    $sorted = array();
+    $sorted = [];
     krsort($this->{$type});
 
     foreach ($this->{$type} as $processors) {
diff --git a/core/lib/Drupal/Core/PhpStorage/PhpStorageFactory.php b/core/lib/Drupal/Core/PhpStorage/PhpStorageFactory.php
index e76e27ff28e28011b7bddf510a672d331822084e..17f889e4b182a102061cc32eebcbc5bcd5b4ca78 100644
--- a/core/lib/Drupal/Core/PhpStorage/PhpStorageFactory.php
+++ b/core/lib/Drupal/Core/PhpStorage/PhpStorageFactory.php
@@ -29,7 +29,7 @@ class PhpStorageFactory {
    *   An instantiated storage for the specified name.
    */
   static function get($name) {
-    $configuration = array();
+    $configuration = [];
     $overrides = Settings::get('php_storage');
     if (isset($overrides[$name])) {
       $configuration = $overrides[$name];
diff --git a/core/lib/Drupal/Core/Plugin/CachedDiscoveryClearer.php b/core/lib/Drupal/Core/Plugin/CachedDiscoveryClearer.php
index 3689df59615fff18c0a72ea1902a01def06edcc5..80c0adae5cb0df455b6538377ab77d6291930996 100644
--- a/core/lib/Drupal/Core/Plugin/CachedDiscoveryClearer.php
+++ b/core/lib/Drupal/Core/Plugin/CachedDiscoveryClearer.php
@@ -14,7 +14,7 @@ class CachedDiscoveryClearer implements CachedDiscoveryClearerInterface {
    *
    * @var \Drupal\Component\Plugin\Discovery\CachedDiscoveryInterface[]
    */
-  protected $cachedDiscoveries = array();
+  protected $cachedDiscoveries = [];
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php b/core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php
index 1426562e955f89e6bb81e391ef675d52d1d55e8e..52d153c3edc145fd3e321d16e8db50c949ec4313 100644
--- a/core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php
+++ b/core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php
@@ -105,7 +105,7 @@ public function getSortedDefinitions(array $definitions = NULL, $label_key = 'la
   public function getGroupedDefinitions(array $definitions = NULL, $label_key = 'label') {
     /** @var \Drupal\Core\Plugin\CategorizingPluginManagerTrait|\Drupal\Component\Plugin\PluginManagerInterface $this */
     $definitions = $this->getSortedDefinitions(isset($definitions) ? $definitions : $this->getDefinitions(), $label_key);
-    $grouped_definitions = array();
+    $grouped_definitions = [];
     foreach ($definitions as $id => $definition) {
       $grouped_definitions[(string) $definition['category']][$id] = $definition;
     }
diff --git a/core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerInterface.php b/core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerInterface.php
index a53de3ff2e8688fc8a3b3ab1ac04178cd329fb02..5c29411f32b284b689bb2eb7e1e19118701147df 100644
--- a/core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerInterface.php
+++ b/core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerInterface.php
@@ -21,6 +21,6 @@ interface ContextAwarePluginManagerInterface extends PluginManagerInterface {
    * @return array
    *   An array of plugin definitions.
    */
-  public function getDefinitionsForContexts(array $contexts = array());
+  public function getDefinitionsForContexts(array $contexts = []);
 
 }
diff --git a/core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerTrait.php b/core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerTrait.php
index fadaebd44eafa7074bd5be2718d3b3433cde65a6..afe2aa59e12382cf0613fbf236b59478ca1fd3a6 100644
--- a/core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerTrait.php
+++ b/core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerTrait.php
@@ -19,7 +19,7 @@ protected function contextHandler() {
   /**
    * See \Drupal\Core\Plugin\Context\ContextAwarePluginManagerInterface::getDefinitionsForContexts().
    */
-  public function getDefinitionsForContexts(array $contexts = array()) {
+  public function getDefinitionsForContexts(array $contexts = []) {
     return $this->contextHandler()->filterPluginDefinitionsByContexts($contexts, $this->getDefinitions());
   }
 
diff --git a/core/lib/Drupal/Core/Plugin/Context/ContextHandler.php b/core/lib/Drupal/Core/Plugin/Context/ContextHandler.php
index 50d8db601b26dc0b6a5c98a5de27c7928807704c..2a13d364d7e4883019c934c2139841c5d07aff57 100644
--- a/core/lib/Drupal/Core/Plugin/Context/ContextHandler.php
+++ b/core/lib/Drupal/Core/Plugin/Context/ContextHandler.php
@@ -66,7 +66,7 @@ public function getMatchingContexts(array $contexts, ContextDefinitionInterface
   /**
    * {@inheritdoc}
    */
-  public function applyContextMapping(ContextAwarePluginInterface $plugin, $contexts, $mappings = array()) {
+  public function applyContextMapping(ContextAwarePluginInterface $plugin, $contexts, $mappings = []) {
     /** @var $contexts \Drupal\Core\Plugin\Context\ContextInterface[] */
     $mappings += $plugin->getContextMapping();
     // Loop through each of the expected contexts.
diff --git a/core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php b/core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php
index 2a219e93788dad9394fd171054ff2f75e2b78b0d..a0d57036083f4c00452556317054642eb73bf67b 100644
--- a/core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php
+++ b/core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php
@@ -75,6 +75,6 @@ public function getMatchingContexts(array $contexts, ContextDefinitionInterface
    * @throws \Drupal\Component\Plugin\Exception\ContextException
    *   Thrown when a context assignment was not satisfied.
    */
-  public function applyContextMapping(ContextAwarePluginInterface $plugin, $contexts, $mappings = array());
+  public function applyContextMapping(ContextAwarePluginInterface $plugin, $contexts, $mappings = []);
 
 }
diff --git a/core/lib/Drupal/Core/Plugin/ContextAwarePluginAssignmentTrait.php b/core/lib/Drupal/Core/Plugin/ContextAwarePluginAssignmentTrait.php
index a5ef4cf877878d2ad29012f36ba3e2f94cb37504..31ff649fafff6d6c2091bf3ec37664802edc6d88 100644
--- a/core/lib/Drupal/Core/Plugin/ContextAwarePluginAssignmentTrait.php
+++ b/core/lib/Drupal/Core/Plugin/ContextAwarePluginAssignmentTrait.php
@@ -12,7 +12,7 @@ trait ContextAwarePluginAssignmentTrait {
    *
    * @see \Drupal\Core\StringTranslation\StringTranslationTrait
    */
-  abstract protected function t($string, array $args = array(), array $options = array());
+  abstract protected function t($string, array $args = [], array $options = []);
 
   /**
    * Wraps the context handler.
diff --git a/core/lib/Drupal/Core/Plugin/DefaultLazyPluginCollection.php b/core/lib/Drupal/Core/Plugin/DefaultLazyPluginCollection.php
index 1928bfb003417eefa10e808b1f614c01a23e222a..3c48892ad5cee84618af8f3b90eb5079acfe885b 100644
--- a/core/lib/Drupal/Core/Plugin/DefaultLazyPluginCollection.php
+++ b/core/lib/Drupal/Core/Plugin/DefaultLazyPluginCollection.php
@@ -33,7 +33,7 @@ class DefaultLazyPluginCollection extends LazyPluginCollection {
    *   An associative array containing the initial configuration for each plugin
    *   in the collection, keyed by plugin instance ID.
    */
-  protected $configurations = array();
+  protected $configurations = [];
 
   /**
    * The key within the plugin configuration that contains the plugin ID.
@@ -47,7 +47,7 @@ class DefaultLazyPluginCollection extends LazyPluginCollection {
    *
    * @var array
    */
-  protected $originalOrder = array();
+  protected $originalOrder = [];
 
   /**
    * Constructs a new DefaultLazyPluginCollection object.
@@ -58,7 +58,7 @@ class DefaultLazyPluginCollection extends LazyPluginCollection {
    *   (optional) An associative array containing the initial configuration for
    *   each plugin in the collection, keyed by plugin instance ID.
    */
-  public function __construct(PluginManagerInterface $manager, array $configurations = array()) {
+  public function __construct(PluginManagerInterface $manager, array $configurations = []) {
     $this->manager = $manager;
     $this->configurations = $configurations;
 
@@ -74,7 +74,7 @@ public function __construct(PluginManagerInterface $manager, array $configuratio
    * {@inheritdoc}
    */
   protected function initializePlugin($instance_id) {
-    $configuration = isset($this->configurations[$instance_id]) ? $this->configurations[$instance_id] : array();
+    $configuration = isset($this->configurations[$instance_id]) ? $this->configurations[$instance_id] : [];
     if (!isset($configuration[$this->pluginKey])) {
       throw new PluginNotFoundException($instance_id);
     }
@@ -87,7 +87,7 @@ protected function initializePlugin($instance_id) {
    * @return $this
    */
   public function sort() {
-    uasort($this->instanceIDs, array($this, 'sortHelper'));
+    uasort($this->instanceIDs, [$this, 'sortHelper']);
     return $this;
   }
 
@@ -104,7 +104,7 @@ public function sortHelper($aID, $bID) {
    * {@inheritdoc}
    */
   public function getConfiguration() {
-    $instances = array();
+    $instances = [];
     // Store the current order of the instances.
     $current_order = $this->instanceIDs;
     // Reorder the instances to match the original order, adding new instances
diff --git a/core/lib/Drupal/Core/Plugin/DefaultPluginManager.php b/core/lib/Drupal/Core/Plugin/DefaultPluginManager.php
index 8622db997ba6406cb4753ba956eacddec99d4025..f9acafba80112870df08374f2ea8209a8180dc13 100644
--- a/core/lib/Drupal/Core/Plugin/DefaultPluginManager.php
+++ b/core/lib/Drupal/Core/Plugin/DefaultPluginManager.php
@@ -149,7 +149,7 @@ public function __construct($subdir, \Traversable $namespaces, ModuleHandlerInte
    *   clearCachedDefinitions() method. Only use cache tags when cached plugin
    *   definitions should be cleared along with other, related cache entries.
    */
-  public function setCacheBackend(CacheBackendInterface $cache_backend, $cache_key, array $cache_tags = array()) {
+  public function setCacheBackend(CacheBackendInterface $cache_backend, $cache_key, array $cache_tags = []) {
     assert('\Drupal\Component\Assertion\Inspector::assertAllStrings($cache_tags)', 'Cache Tags must be strings.');
     $this->cacheBackend = $cache_backend;
     $this->cacheKey = $cache_key;
@@ -291,7 +291,7 @@ protected function findDefinitions() {
     // plugin definition.
     foreach ($definitions as $plugin_id => $plugin_definition) {
       $provider = $this->extractProviderFromDefinition($plugin_definition);
-      if ($provider && !in_array($provider, array('core', 'component')) && !$this->providerExists($provider)) {
+      if ($provider && !in_array($provider, ['core', 'component']) && !$this->providerExists($provider)) {
         unset($definitions[$plugin_id]);
       }
     }
diff --git a/core/lib/Drupal/Core/Plugin/Discovery/AnnotatedClassDiscovery.php b/core/lib/Drupal/Core/Plugin/Discovery/AnnotatedClassDiscovery.php
index 770308defb0808d019a956af7bc3b7cc13d0f76c..bbcc858c9ccae4bfadd91dbfe4dbde316450fd19 100644
--- a/core/lib/Drupal/Core/Plugin/Discovery/AnnotatedClassDiscovery.php
+++ b/core/lib/Drupal/Core/Plugin/Discovery/AnnotatedClassDiscovery.php
@@ -61,7 +61,7 @@ function __construct($subdir, \Traversable $root_namespaces, $plugin_definition_
       $this->namespaceSuffix = str_replace('/', '\\', $subdir);
     }
     $this->rootNamespacesIterator = $root_namespaces;
-    $plugin_namespaces = array();
+    $plugin_namespaces = [];
     parent::__construct($plugin_namespaces, $plugin_definition_annotation_name, $annotation_namespaces);
   }
 
@@ -113,7 +113,7 @@ protected function getProviderFromNamespace($namespace) {
    * {@inheritdoc}
    */
   protected function getPluginNamespaces() {
-    $plugin_namespaces = array();
+    $plugin_namespaces = [];
     if ($this->namespaceSuffix) {
       foreach ($this->rootNamespacesIterator as $namespace => $dirs) {
         // Append the namespace suffix to the base namespace, to obtain the
diff --git a/core/lib/Drupal/Core/Plugin/Discovery/HookDiscovery.php b/core/lib/Drupal/Core/Plugin/Discovery/HookDiscovery.php
index 24f5caeafa88266d4644862d4d04cee0854df818..e366bcb28977dd36e6b59a2e06998dc54ed72845 100644
--- a/core/lib/Drupal/Core/Plugin/Discovery/HookDiscovery.php
+++ b/core/lib/Drupal/Core/Plugin/Discovery/HookDiscovery.php
@@ -45,7 +45,7 @@ function __construct(ModuleHandlerInterface $module_handler, $hook) {
    * {@inheritdoc}
    */
   public function getDefinitions() {
-    $definitions = array();
+    $definitions = [];
     foreach ($this->moduleHandler->getImplementations($this->hook) as $module) {
       $result = $this->moduleHandler->invoke($module, $this->hook);
       foreach ($result as $plugin_id => $definition) {
diff --git a/core/lib/Drupal/Core/Plugin/Discovery/InfoHookDecorator.php b/core/lib/Drupal/Core/Plugin/Discovery/InfoHookDecorator.php
index af250d95747561f56415109d776373aec0861780..6501ce0d1054e322c233b6642db41c79e08522b6 100644
--- a/core/lib/Drupal/Core/Plugin/Discovery/InfoHookDecorator.php
+++ b/core/lib/Drupal/Core/Plugin/Discovery/InfoHookDecorator.php
@@ -55,7 +55,7 @@ public function getDefinitions() {
    * Passes through all unknown calls onto the decorated object.
    */
   public function __call($method, $args) {
-    return call_user_func_array(array($this->decorated, $method), $args);
+    return call_user_func_array([$this->decorated, $method], $args);
   }
 
 }
diff --git a/core/lib/Drupal/Core/Plugin/Discovery/YamlDiscovery.php b/core/lib/Drupal/Core/Plugin/Discovery/YamlDiscovery.php
index c149c104d1373c45e5f1f39b1b172fdcb9af83b6..af5630c764b276e988f348d2e60756ed6c6b29fd 100644
--- a/core/lib/Drupal/Core/Plugin/Discovery/YamlDiscovery.php
+++ b/core/lib/Drupal/Core/Plugin/Discovery/YamlDiscovery.php
@@ -75,7 +75,7 @@ public function getDefinitions() {
     $plugins = $this->discovery->findAll();
 
     // Flatten definitions into what's expected from plugins.
-    $definitions = array();
+    $definitions = [];
     foreach ($plugins as $provider => $list) {
       foreach ($list as $id => $definition) {
         // Add TranslatableMarkup.
@@ -92,10 +92,10 @@ public function getDefinitions() {
           }
         }
         // Add ID and provider.
-        $definitions[$id] = $definition + array(
+        $definitions[$id] = $definition + [
           'provider' => $provider,
           'id' => $id,
-        );
+        ];
       }
     }
 
diff --git a/core/lib/Drupal/Core/Plugin/Discovery/YamlDiscoveryDecorator.php b/core/lib/Drupal/Core/Plugin/Discovery/YamlDiscoveryDecorator.php
index a061f4be3f064908891e418c0d6a360d4fc94df6..e415c5b2657b99b9613d60214c45bdbf62216da3 100644
--- a/core/lib/Drupal/Core/Plugin/Discovery/YamlDiscoveryDecorator.php
+++ b/core/lib/Drupal/Core/Plugin/Discovery/YamlDiscoveryDecorator.php
@@ -47,7 +47,7 @@ public function getDefinitions() {
    * Passes through all unknown calls onto the decorated object.
    */
   public function __call($method, $args) {
-    return call_user_func_array(array($this->decorated, $method), $args);
+    return call_user_func_array([$this->decorated, $method], $args);
   }
 
 }
diff --git a/core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php b/core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php
index 7658b42f640820a27732fb51125183eae02dfb2a..7aefa5917e0caae46b88e225c80009520776b085 100644
--- a/core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php
+++ b/core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php
@@ -12,7 +12,7 @@ class ContainerFactory extends DefaultFactory {
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $plugin_definition = $this->discovery->getDefinition($plugin_id);
     $plugin_class = static::getPluginClass($plugin_id, $plugin_definition, $this->interface);
 
diff --git a/core/lib/Drupal/Core/Plugin/PluginManagerPass.php b/core/lib/Drupal/Core/Plugin/PluginManagerPass.php
index dcacf7b525445b3ec2a2c827d41833b655da2bbb..9d4a483ae17df426b04a55da16283185de21f221 100644
--- a/core/lib/Drupal/Core/Plugin/PluginManagerPass.php
+++ b/core/lib/Drupal/Core/Plugin/PluginManagerPass.php
@@ -19,7 +19,7 @@ public function process(ContainerBuilder $container) {
     foreach ($container->getDefinitions() as $service_id => $definition) {
       if (strpos($service_id, 'plugin.manager.') === 0 || $definition->hasTag('plugin_manager_cache_clear')) {
         if (is_subclass_of($definition->getClass(), '\Drupal\Component\Plugin\Discovery\CachedDiscoveryInterface')) {
-          $cache_clearer_definition->addMethodCall('addCachedDiscovery', array(new Reference($service_id)));
+          $cache_clearer_definition->addMethodCall('addCachedDiscovery', [new Reference($service_id)]);
         }
       }
     }
diff --git a/core/lib/Drupal/Core/Queue/Batch.php b/core/lib/Drupal/Core/Queue/Batch.php
index a7827a992f71f07f5c04cf345eb1753b83929965..1be96d877cc8a8da5de6521bac33a651a508f3bf 100644
--- a/core/lib/Drupal/Core/Queue/Batch.php
+++ b/core/lib/Drupal/Core/Queue/Batch.php
@@ -26,7 +26,7 @@ class Batch extends DatabaseQueue {
    */
   public function claimItem($lease_time = 0) {
     try {
-      $item = $this->connection->queryRange('SELECT data, item_id FROM {queue} q WHERE name = :name ORDER BY item_id ASC', 0, 1, array(':name' => $this->name))->fetchObject();
+      $item = $this->connection->queryRange('SELECT data, item_id FROM {queue} q WHERE name = :name ORDER BY item_id ASC', 0, 1, [':name' => $this->name])->fetchObject();
       if ($item) {
         $item->data = unserialize($item->data);
         return $item;
@@ -48,9 +48,9 @@ public function claimItem($lease_time = 0) {
    *   An array of queue items.
    */
   public function getAllItems() {
-    $result = array();
+    $result = [];
     try {
-      $items = $this->connection->query('SELECT data FROM {queue} q WHERE name = :name ORDER BY item_id ASC', array(':name' => $this->name))->fetchAll();
+      $items = $this->connection->query('SELECT data FROM {queue} q WHERE name = :name ORDER BY item_id ASC', [':name' => $this->name])->fetchAll();
       foreach ($items as $item) {
         $result[] = unserialize($item->data);
       }
diff --git a/core/lib/Drupal/Core/Queue/BatchMemory.php b/core/lib/Drupal/Core/Queue/BatchMemory.php
index 8245308427e6be03a42cc069935d4d3c46dd8b68..bf4ba55913f8fc22bd243901f5d7abcf10d0616f 100644
--- a/core/lib/Drupal/Core/Queue/BatchMemory.php
+++ b/core/lib/Drupal/Core/Queue/BatchMemory.php
@@ -40,7 +40,7 @@ public function claimItem($lease_time = 0) {
    *   An array of queue items.
    */
   public function getAllItems() {
-    $result = array();
+    $result = [];
     foreach ($this->queue as $item) {
       $result[] = $item->data;
     }
diff --git a/core/lib/Drupal/Core/Queue/DatabaseQueue.php b/core/lib/Drupal/Core/Queue/DatabaseQueue.php
index eaa6757667000dfe05c5f4cd4842cbd9707420e7..710a99b4941e56673e0ebaae1307fcf663be4952 100644
--- a/core/lib/Drupal/Core/Queue/DatabaseQueue.php
+++ b/core/lib/Drupal/Core/Queue/DatabaseQueue.php
@@ -84,13 +84,13 @@ public function createItem($data) {
    */
   protected function doCreateItem($data) {
     $query = $this->connection->insert(static::TABLE_NAME)
-      ->fields(array(
+      ->fields([
         'name' => $this->name,
         'data' => serialize($data),
         // We cannot rely on REQUEST_TIME because many items might be created
         // by a single request which takes longer than 1 second.
         'created' => time(),
-      ));
+      ]);
     // Return the new serial ID, or FALSE on failure.
     return $query->execute();
   }
@@ -100,7 +100,7 @@ protected function doCreateItem($data) {
    */
   public function numberOfItems() {
     try {
-      return $this->connection->query('SELECT COUNT(item_id) FROM {' . static::TABLE_NAME . '} WHERE name = :name', array(':name' => $this->name))
+      return $this->connection->query('SELECT COUNT(item_id) FROM {' . static::TABLE_NAME . '} WHERE name = :name', [':name' => $this->name])
         ->fetchField();
     }
     catch (\Exception $e) {
@@ -120,7 +120,7 @@ public function claimItem($lease_time = 30) {
     // are no unclaimed items left.
     while (TRUE) {
       try {
-        $item = $this->connection->queryRange('SELECT data, created, item_id FROM {' . static::TABLE_NAME . '} q WHERE expire = 0 AND name = :name ORDER BY created, item_id ASC', 0, 1, array(':name' => $this->name))->fetchObject();
+        $item = $this->connection->queryRange('SELECT data, created, item_id FROM {' . static::TABLE_NAME . '} q WHERE expire = 0 AND name = :name ORDER BY created, item_id ASC', 0, 1, [':name' => $this->name])->fetchObject();
       }
       catch (\Exception $e) {
         $this->catchException($e);
@@ -136,9 +136,9 @@ public function claimItem($lease_time = 30) {
         // time from the lease, and will tend to reset items before the lease
         // should really expire.
         $update = $this->connection->update(static::TABLE_NAME)
-          ->fields(array(
+          ->fields([
             'expire' => time() + $lease_time,
-          ))
+          ])
           ->condition('item_id', $item->item_id)
           ->condition('expire', 0);
         // If there are affected rows, this update succeeded.
@@ -160,9 +160,9 @@ public function claimItem($lease_time = 30) {
   public function releaseItem($item) {
     try {
       $update = $this->connection->update(static::TABLE_NAME)
-        ->fields(array(
+        ->fields([
           'expire' => 0,
-        ))
+        ])
         ->condition('item_id', $item->item_id);
       return $update->execute();
     }
@@ -223,9 +223,9 @@ public function garbageCollection() {
       // Reset expired items in the default queue implementation table. If that's
       // not used, this will simply be a no-op.
       $this->connection->update(static::TABLE_NAME)
-        ->fields(array(
+        ->fields([
           'expire' => 0,
-        ))
+        ])
         ->condition('expire', 0, '<>')
         ->condition('expire', REQUEST_TIME, '<')
         ->execute();
diff --git a/core/lib/Drupal/Core/Queue/Memory.php b/core/lib/Drupal/Core/Queue/Memory.php
index b921d2c0e0cffbd22f8a6a2bdcfd8ff07c78de5e..2e4ac0f1c97f3fcf125d8ba5a3a5bfc027d8bd50 100644
--- a/core/lib/Drupal/Core/Queue/Memory.php
+++ b/core/lib/Drupal/Core/Queue/Memory.php
@@ -33,7 +33,7 @@ class Memory implements QueueInterface {
    *   An arbitrary string. The name of the queue to work with.
    */
   public function __construct($name) {
-    $this->queue = array();
+    $this->queue = [];
     $this->idSequence = 0;
   }
 
@@ -100,7 +100,7 @@ public function createQueue() {
    * {@inheritdoc}
    */
   public function deleteQueue() {
-    $this->queue = array();
+    $this->queue = [];
     $this->idSequence = 0;
   }
 
diff --git a/core/lib/Drupal/Core/Queue/QueueFactory.php b/core/lib/Drupal/Core/Queue/QueueFactory.php
index db493d9f9804435b9c6c8c90f24896a3ce5a9e58..74126ef9041e176c2cd9b5f790e9eae82261e645 100644
--- a/core/lib/Drupal/Core/Queue/QueueFactory.php
+++ b/core/lib/Drupal/Core/Queue/QueueFactory.php
@@ -18,7 +18,7 @@ class QueueFactory implements ContainerAwareInterface {
    *
    * @var array
    */
-  protected $queues = array();
+  protected $queues = [];
 
   /**
    * The settings object.
diff --git a/core/lib/Drupal/Core/Render/BubbleableMetadata.php b/core/lib/Drupal/Core/Render/BubbleableMetadata.php
index d1e43c9c6143124de60e74ebae7599cfae89d6c7..33aa755ea8c4a9c201db86c49fbc6c115a73bd81 100644
--- a/core/lib/Drupal/Core/Render/BubbleableMetadata.php
+++ b/core/lib/Drupal/Core/Render/BubbleableMetadata.php
@@ -149,7 +149,7 @@ public static function mergeAttachments(array $a, array $b) {
     // correctly; adding the same settings multiple times needs to behave
     // idempotently.
     if (!empty($a['drupalSettings']) && !empty($b['drupalSettings'])) {
-      $drupalSettings = NestedArray::mergeDeepArray(array($a['drupalSettings'], $b['drupalSettings']), TRUE);
+      $drupalSettings = NestedArray::mergeDeepArray([$a['drupalSettings'], $b['drupalSettings']], TRUE);
       // No need for re-merging them.
       unset($a['drupalSettings']);
       unset($b['drupalSettings']);
diff --git a/core/lib/Drupal/Core/Render/Element.php b/core/lib/Drupal/Core/Render/Element.php
index c150519addf7732188d98ff629fce164f1f6f097..e394a399465fbfb4b08de8c82f72a021cda57c89 100644
--- a/core/lib/Drupal/Core/Render/Element.php
+++ b/core/lib/Drupal/Core/Render/Element.php
@@ -74,7 +74,7 @@ public static function children(array &$elements, $sort = FALSE) {
 
     // Filter out properties from the element, leaving only children.
     $count = count($elements);
-    $child_weights = array();
+    $child_weights = [];
     $i = 0;
     $sortable = FALSE;
     foreach ($elements as $key => $value) {
@@ -94,7 +94,7 @@ public static function children(array &$elements, $sort = FALSE) {
         // Only trigger an error if the value is not null.
         // @see https://www.drupal.org/node/1283892
         elseif (isset($value)) {
-          trigger_error(SafeMarkup::format('"@key" is an invalid render array key', array('@key' => $key)), E_USER_ERROR);
+          trigger_error(SafeMarkup::format('"@key" is an invalid render array key', ['@key' => $key]), E_USER_ERROR);
         }
       }
       $i++;
@@ -127,7 +127,7 @@ public static function children(array &$elements, $sort = FALSE) {
    *   The array keys of the element's visible children.
    */
   public static function getVisibleChildren(array $elements) {
-    $visible_children = array();
+    $visible_children = [];
 
     foreach (static::children($elements) as $key) {
       $child = $elements[$key];
diff --git a/core/lib/Drupal/Core/Render/Element/Actions.php b/core/lib/Drupal/Core/Render/Element/Actions.php
index 1f94466d8e82c6c928ccdf2c2b56be7aad346a47..ad85401ed9260d3050ea8ee431a448c2d59830e8 100644
--- a/core/lib/Drupal/Core/Render/Element/Actions.php
+++ b/core/lib/Drupal/Core/Render/Element/Actions.php
@@ -30,16 +30,16 @@ class Actions extends Container {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#process' => array(
+    return [
+      '#process' => [
         // @todo Move this to #pre_render.
-        array($class, 'preRenderActionsDropbutton'),
-        array($class, 'processActions'),
-        array($class, 'processContainer'),
-      ),
+        [$class, 'preRenderActionsDropbutton'],
+        [$class, 'processActions'],
+        [$class, 'processContainer'],
+      ],
       '#weight' => 100,
-      '#theme_wrappers' => array('container'),
-    );
+      '#theme_wrappers' => ['container'],
+    ];
   }
 
   /**
@@ -86,23 +86,23 @@ public static function processActions(&$element, FormStateInterface $form_state,
    *   into new #type 'dropbutton' elements.
    */
   public static function preRenderActionsDropbutton(&$element, FormStateInterface $form_state, &$complete_form) {
-    $dropbuttons = array();
+    $dropbuttons = [];
     foreach (Element::children($element, TRUE) as $key) {
       if (isset($element[$key]['#dropbutton'])) {
         $dropbutton = $element[$key]['#dropbutton'];
         // If there is no dropbutton for this button group yet, create one.
         if (!isset($dropbuttons[$dropbutton])) {
-          $dropbuttons[$dropbutton] = array(
+          $dropbuttons[$dropbutton] = [
             '#type' => 'dropbutton',
-          );
+          ];
         }
         // Add this button to the corresponding dropbutton.
         // @todo Change #type 'dropbutton' to be based on item-list.html.twig
         //   instead of links.html.twig to avoid this preemptive rendering.
         $button = \Drupal::service('renderer')->renderPlain($element[$key]);
-        $dropbuttons[$dropbutton]['#links'][$key] = array(
+        $dropbuttons[$dropbutton]['#links'][$key] = [
           'title' => $button,
-        );
+        ];
       }
     }
     // @todo For now, all dropbuttons appear first. Consider to invent a more
diff --git a/core/lib/Drupal/Core/Render/Element/Ajax.php b/core/lib/Drupal/Core/Render/Element/Ajax.php
index 672e4ca77fc3ec8a8ad866597eff40c742be5f90..d22d7edf221a49bd5e042ef6def7e67f11932dbd 100644
--- a/core/lib/Drupal/Core/Render/Element/Ajax.php
+++ b/core/lib/Drupal/Core/Render/Element/Ajax.php
@@ -21,11 +21,11 @@ public function getInfo() {
     // an HTML page, so we don't provide defaults for #theme or #theme_wrappers.
     // However, modules can set these properties (for example, to provide an
     // HTML debugging page that displays rather than executes Ajax commands).
-    return array(
+    return [
       '#header' => TRUE,
-      '#commands' => array(),
+      '#commands' => [],
       '#error' => NULL,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/Button.php b/core/lib/Drupal/Core/Render/Element/Button.php
index c5b84f078d1ebc93be4b60352bca853247138b3b..63451ea060ff9341cbc340d6099ba6f50b58da0b 100644
--- a/core/lib/Drupal/Core/Render/Element/Button.php
+++ b/core/lib/Drupal/Core/Render/Element/Button.php
@@ -37,21 +37,21 @@ class Button extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#name' => 'op',
       '#is_button' => TRUE,
       '#executes_submit_callback' => FALSE,
       '#limit_validation_errors' => FALSE,
-      '#process' => array(
-        array($class, 'processButton'),
-        array($class, 'processAjaxForm'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderButton'),
-      ),
-      '#theme_wrappers' => array('input__submit'),
-    );
+      '#process' => [
+        [$class, 'processButton'],
+        [$class, 'processAjaxForm'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderButton'],
+      ],
+      '#theme_wrappers' => ['input__submit'],
+    ];
   }
 
   /**
@@ -81,7 +81,7 @@ public static function processButton(&$element, FormStateInterface $form_state,
    */
   public static function preRenderButton($element) {
     $element['#attributes']['type'] = 'submit';
-    Element::setAttributes($element, array('id', 'name', 'value'));
+    Element::setAttributes($element, ['id', 'name', 'value']);
 
     $element['#attributes']['class'][] = 'button';
     if (!empty($element['#button_type'])) {
diff --git a/core/lib/Drupal/Core/Render/Element/Checkbox.php b/core/lib/Drupal/Core/Render/Element/Checkbox.php
index c9b8817044e1558b9208a806c32d292c25aa30dd..9092314dfde23de8dc1447d41363f01305a0dcfd 100644
--- a/core/lib/Drupal/Core/Render/Element/Checkbox.php
+++ b/core/lib/Drupal/Core/Render/Element/Checkbox.php
@@ -30,22 +30,22 @@ class Checkbox extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#return_value' => 1,
-      '#process' => array(
-        array($class, 'processCheckbox'),
-        array($class, 'processAjaxForm'),
-        array($class, 'processGroup'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderCheckbox'),
-        array($class, 'preRenderGroup'),
-      ),
+      '#process' => [
+        [$class, 'processCheckbox'],
+        [$class, 'processAjaxForm'],
+        [$class, 'processGroup'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderCheckbox'],
+        [$class, 'preRenderGroup'],
+      ],
       '#theme' => 'input__checkbox',
-      '#theme_wrappers' => array('form_element'),
+      '#theme_wrappers' => ['form_element'],
       '#title_display' => 'after',
-    );
+    ];
   }
 
   /**
@@ -93,13 +93,13 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
    */
   public static function preRenderCheckbox($element) {
     $element['#attributes']['type'] = 'checkbox';
-    Element::setAttributes($element, array('id', 'name', '#return_value' => 'value'));
+    Element::setAttributes($element, ['id', 'name', '#return_value' => 'value']);
 
     // Unchecked checkbox has #value of integer 0.
     if (!empty($element['#checked'])) {
       $element['#attributes']['checked'] = 'checked';
     }
-    static::setAttributes($element, array('form-checkbox'));
+    static::setAttributes($element, ['form-checkbox']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Checkboxes.php b/core/lib/Drupal/Core/Render/Element/Checkboxes.php
index 78108b5391e4936f09f5653a11ebc69907811989..3663cd57bb4d07f2d5aca9c838fdbb3acf178924 100644
--- a/core/lib/Drupal/Core/Render/Element/Checkboxes.php
+++ b/core/lib/Drupal/Core/Render/Element/Checkboxes.php
@@ -37,27 +37,27 @@ class Checkboxes extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
-      '#process' => array(
-        array($class, 'processCheckboxes'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderCompositeFormElement'),
-      ),
-      '#theme_wrappers' => array('checkboxes'),
-    );
+      '#process' => [
+        [$class, 'processCheckboxes'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderCompositeFormElement'],
+      ],
+      '#theme_wrappers' => ['checkboxes'],
+    ];
   }
 
   /**
    * Processes a checkboxes form element.
    */
   public static function processCheckboxes(&$element, FormStateInterface $form_state, &$complete_form) {
-    $value = is_array($element['#value']) ? $element['#value'] : array();
+    $value = is_array($element['#value']) ? $element['#value'] : [];
     $element['#tree'] = TRUE;
     if (count($element['#options']) > 0) {
       if (!isset($element['#default_value']) || $element['#default_value'] == 0) {
-        $element['#default_value'] = array();
+        $element['#default_value'] = [];
       }
       $weight = 0;
       foreach ($element['#options'] as $key => $choice) {
@@ -73,8 +73,8 @@ public static function processCheckboxes(&$element, FormStateInterface $form_sta
         // sub-elements.
         $weight += 0.001;
 
-        $element += array($key => array());
-        $element[$key] += array(
+        $element += [$key => []];
+        $element[$key] += [
           '#type' => 'checkbox',
           '#title' => $choice,
           '#return_value' => $key,
@@ -84,7 +84,7 @@ public static function processCheckboxes(&$element, FormStateInterface $form_sta
           // Errors should only be shown on the parent checkboxes element.
           '#error_no_message' => TRUE,
           '#weight' => $weight,
-        );
+        ];
       }
     }
     return $element;
@@ -95,8 +95,8 @@ public static function processCheckboxes(&$element, FormStateInterface $form_sta
    */
   public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
     if ($input === FALSE) {
-      $value = array();
-      $element += array('#default_value' => array());
+      $value = [];
+      $element += ['#default_value' => []];
       foreach ($element['#default_value'] as $key) {
         $value[$key] = $key;
       }
@@ -118,7 +118,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
       return array_combine($input, $input);
     }
     else {
-      return array();
+      return [];
     }
   }
 
diff --git a/core/lib/Drupal/Core/Render/Element/Color.php b/core/lib/Drupal/Core/Render/Element/Color.php
index 0f0228cc1380c548ba693a23e78cdc5fc00b3f2f..716a0760de196959ddf3730880f08d09af3fc68c 100644
--- a/core/lib/Drupal/Core/Render/Element/Color.php
+++ b/core/lib/Drupal/Core/Render/Element/Color.php
@@ -30,20 +30,20 @@ class Color extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
-      '#process' => array(
-        array($class, 'processAjaxForm'),
-      ),
-      '#element_validate' => array(
-        array($class, 'validateColor'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderColor'),
-      ),
+      '#process' => [
+        [$class, 'processAjaxForm'],
+      ],
+      '#element_validate' => [
+        [$class, 'validateColor'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderColor'],
+      ],
       '#theme' => 'input__color',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -63,7 +63,7 @@ public static function validateColor(&$element, FormStateInterface $form_state,
         $form_state->setValueForElement($element, ColorUtility::rgbToHex(ColorUtility::hexToRgb($value)));
       }
       catch (\InvalidArgumentException $e) {
-        $form_state->setError($element, t('%name must be a valid color.', array('%name' => empty($element['#title']) ? $element['#parents'][0] : $element['#title'])));
+        $form_state->setError($element, t('%name must be a valid color.', ['%name' => empty($element['#title']) ? $element['#parents'][0] : $element['#title']]));
       }
     }
   }
@@ -80,8 +80,8 @@ public static function validateColor(&$element, FormStateInterface $form_state,
    */
   public static function preRenderColor($element) {
     $element['#attributes']['type'] = 'color';
-    Element::setAttributes($element, array('id', 'name', 'value'));
-    static::setAttributes($element, array('form-color'));
+    Element::setAttributes($element, ['id', 'name', 'value']);
+    static::setAttributes($element, ['form-color']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Container.php b/core/lib/Drupal/Core/Render/Element/Container.php
index eb46f20cecaa0c27105bd86f776a3e3a3093a376..212000d7be5629bcc6e3c0e7cf8ee182897a75a9 100644
--- a/core/lib/Drupal/Core/Render/Element/Container.php
+++ b/core/lib/Drupal/Core/Render/Element/Container.php
@@ -45,16 +45,16 @@ class Container extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#process' => array(
-        array($class, 'processGroup'),
-        array($class, 'processContainer'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderGroup'),
-      ),
-      '#theme_wrappers' => array('container'),
-    );
+    return [
+      '#process' => [
+        [$class, 'processGroup'],
+        [$class, 'processContainer'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderGroup'],
+      ],
+      '#theme_wrappers' => ['container'],
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Render/Element/Date.php b/core/lib/Drupal/Core/Render/Element/Date.php
index 7a0801d9c8474e2f0675b6858ee6c9b2897f452f..11e15d8443bfbeeff63a8cc90b23dbeee3a9e3c6 100644
--- a/core/lib/Drupal/Core/Render/Element/Date.php
+++ b/core/lib/Drupal/Core/Render/Element/Date.php
@@ -88,8 +88,8 @@ public static function preRenderDate($element) {
     if (empty($element['#attributes']['type'])) {
       $element['#attributes']['type'] = 'date';
     }
-    Element::setAttributes($element, array('id', 'name', 'type', 'min', 'max', 'step', 'value', 'size'));
-    static::setAttributes($element, array('form-' . $element['#attributes']['type']));
+    Element::setAttributes($element, ['id', 'name', 'type', 'min', 'max', 'step', 'value', 'size']);
+    static::setAttributes($element, ['form-' . $element['#attributes']['type']]);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Details.php b/core/lib/Drupal/Core/Render/Element/Details.php
index 2ae6f1d8ef7127928993160a5d24b67ed67b7e84..92bbb32bd1ea8a8d7a3409d48bb317ea43311874 100644
--- a/core/lib/Drupal/Core/Render/Element/Details.php
+++ b/core/lib/Drupal/Core/Render/Element/Details.php
@@ -41,19 +41,19 @@ class Details extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#open' => FALSE,
       '#value' => NULL,
-      '#process' => array(
-        array($class, 'processGroup'),
-        array($class, 'processAjaxForm'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderDetails'),
-        array($class, 'preRenderGroup'),
-      ),
-      '#theme_wrappers' => array('details'),
-    );
+      '#process' => [
+        [$class, 'processGroup'],
+        [$class, 'processAjaxForm'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderDetails'],
+        [$class, 'preRenderGroup'],
+      ],
+      '#theme_wrappers' => ['details'],
+    ];
   }
 
   /**
@@ -67,11 +67,11 @@ public function getInfo() {
    *   The modified element.
    */
   public static function preRenderDetails($element) {
-    Element::setAttributes($element, array('id'));
+    Element::setAttributes($element, ['id']);
 
     // The .js-form-wrapper class is required for #states to treat details like
     // containers.
-    static::setAttributes($element, array('js-form-wrapper', 'form-wrapper'));
+    static::setAttributes($element, ['js-form-wrapper', 'form-wrapper']);
 
     // Collapsible details.
     $element['#attached']['library'][] = 'core/drupal.collapse';
diff --git a/core/lib/Drupal/Core/Render/Element/Dropbutton.php b/core/lib/Drupal/Core/Render/Element/Dropbutton.php
index 30f9755326e51a8c5a0f4995adaa2945da15e57a..682f5cce57c827c70cad02b028b7314e80b07c3d 100644
--- a/core/lib/Drupal/Core/Render/Element/Dropbutton.php
+++ b/core/lib/Drupal/Core/Render/Element/Dropbutton.php
@@ -46,12 +46,12 @@ class Dropbutton extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderDropbutton'),
-      ),
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderDropbutton'],
+      ],
       '#theme' => 'links__dropbutton',
-    );
+    ];
   }
 
   /**
@@ -61,7 +61,7 @@ public static function preRenderDropbutton($element) {
     $element['#attached']['library'][] = 'core/drupal.dropbutton';
     $element['#attributes']['class'][] = 'dropbutton';
     if (!isset($element['#theme_wrappers'])) {
-      $element['#theme_wrappers'] = array();
+      $element['#theme_wrappers'] = [];
     }
     array_unshift($element['#theme_wrappers'], 'dropbutton_wrapper');
 
diff --git a/core/lib/Drupal/Core/Render/Element/ElementInterface.php b/core/lib/Drupal/Core/Render/Element/ElementInterface.php
index 320a83dca6e644d6e810343032b77bc582decea5..12cb67d3a14c354ffdf826b2876950187b1319ba 100644
--- a/core/lib/Drupal/Core/Render/Element/ElementInterface.php
+++ b/core/lib/Drupal/Core/Render/Element/ElementInterface.php
@@ -47,6 +47,6 @@ public function getInfo();
    * @param array $class
    *   Array of new class names to be added.
    */
-  public static function setAttributes(&$element, $class = array());
+  public static function setAttributes(&$element, $class = []);
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/Email.php b/core/lib/Drupal/Core/Render/Element/Email.php
index 247967667f0be222045dfc20c026164dbd583420..dce2a344c4953a45737654dc4e8fa6141534b8e4 100644
--- a/core/lib/Drupal/Core/Render/Element/Email.php
+++ b/core/lib/Drupal/Core/Render/Element/Email.php
@@ -43,25 +43,25 @@ class Email extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#size' => 60,
       '#maxlength' => self::EMAIL_MAX_LENGTH,
       '#autocomplete_route_name' => FALSE,
-      '#process' => array(
-        array($class, 'processAutocomplete'),
-        array($class, 'processAjaxForm'),
-        array($class, 'processPattern'),
-      ),
-      '#element_validate' => array(
-        array($class, 'validateEmail'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderEmail'),
-      ),
+      '#process' => [
+        [$class, 'processAutocomplete'],
+        [$class, 'processAjaxForm'],
+        [$class, 'processPattern'],
+      ],
+      '#element_validate' => [
+        [$class, 'validateEmail'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderEmail'],
+      ],
       '#theme' => 'input__email',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -74,7 +74,7 @@ public static function validateEmail(&$element, FormStateInterface $form_state,
     $form_state->setValueForElement($element, $value);
 
     if ($value !== '' && !\Drupal::service('email.validator')->isValid($value)) {
-      $form_state->setError($element, t('The email address %mail is not valid.', array('%mail' => $value)));
+      $form_state->setError($element, t('The email address %mail is not valid.', ['%mail' => $value]));
     }
   }
 
@@ -91,8 +91,8 @@ public static function validateEmail(&$element, FormStateInterface $form_state,
    */
   public static function preRenderEmail($element) {
     $element['#attributes']['type'] = 'email';
-    Element::setAttributes($element, array('id', 'name', 'value', 'size', 'maxlength', 'placeholder'));
-    static::setAttributes($element, array('form-email'));
+    Element::setAttributes($element, ['id', 'name', 'value', 'size', 'maxlength', 'placeholder']);
+    static::setAttributes($element, ['form-email']);
     return $element;
   }
 
diff --git a/core/lib/Drupal/Core/Render/Element/Fieldgroup.php b/core/lib/Drupal/Core/Render/Element/Fieldgroup.php
index a1bc1eec2d2b3fddb8ff022283ae7499491b9e8e..6c73c35f6ce09b1e96be71bb3737c4bc06b7fd40 100644
--- a/core/lib/Drupal/Core/Render/Element/Fieldgroup.php
+++ b/core/lib/Drupal/Core/Render/Element/Fieldgroup.php
@@ -19,9 +19,9 @@
 class Fieldgroup extends Fieldset {
 
   public function getInfo() {
-    return array(
-      '#attributes' => array('class' => array('fieldgroup')),
-    ) + parent::getInfo();
+    return [
+      '#attributes' => ['class' => ['fieldgroup']],
+    ] + parent::getInfo();
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/Fieldset.php b/core/lib/Drupal/Core/Render/Element/Fieldset.php
index d8cb540338e3fab9762c1db0406d6377a1b41aa1..baed3913676cc5c4017d4d3007fffbd002e16429 100644
--- a/core/lib/Drupal/Core/Render/Element/Fieldset.php
+++ b/core/lib/Drupal/Core/Render/Element/Fieldset.php
@@ -30,17 +30,17 @@ class Fieldset extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#process' => array(
-        array($class, 'processGroup'),
-        array($class, 'processAjaxForm'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderGroup'),
-      ),
+    return [
+      '#process' => [
+        [$class, 'processGroup'],
+        [$class, 'processAjaxForm'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderGroup'],
+      ],
       '#value' => NULL,
-      '#theme_wrappers' => array('fieldset'),
-    );
+      '#theme_wrappers' => ['fieldset'],
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/File.php b/core/lib/Drupal/Core/Render/Element/File.php
index d37d5c7c1d8cb13e25256a3ffd8c3e44c9dbb9f4..07bd415078d7f2754ac396968701d94c1633b790 100644
--- a/core/lib/Drupal/Core/Render/Element/File.php
+++ b/core/lib/Drupal/Core/Render/Element/File.php
@@ -24,19 +24,19 @@ class File extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#multiple' => FALSE,
-      '#process' => array(
-        array($class, 'processFile'),
-      ),
+      '#process' => [
+        [$class, 'processFile'],
+      ],
       '#size' => 60,
-      '#pre_render' => array(
-        array($class, 'preRenderFile'),
-      ),
+      '#pre_render' => [
+        [$class, 'preRenderFile'],
+      ],
       '#theme' => 'input__file',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -44,7 +44,7 @@ public function getInfo() {
    */
   public static function processFile(&$element, FormStateInterface $form_state, &$complete_form) {
     if ($element['#multiple']) {
-      $element['#attributes'] = array('multiple' => 'multiple');
+      $element['#attributes'] = ['multiple' => 'multiple'];
       $element['#name'] .= '[]';
     }
     return $element;
@@ -66,8 +66,8 @@ public static function processFile(&$element, FormStateInterface $form_state, &$
    */
   public static function preRenderFile($element) {
     $element['#attributes']['type'] = 'file';
-    Element::setAttributes($element, array('id', 'name', 'size'));
-    static::setAttributes($element, array('js-form-file', 'form-file'));
+    Element::setAttributes($element, ['id', 'name', 'size']);
+    static::setAttributes($element, ['js-form-file', 'form-file']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Form.php b/core/lib/Drupal/Core/Render/Element/Form.php
index 61739caf071577eb7c9f923f868cd99319c319c6..d81c2545c9dd414a4e2ce88e60ed2e240dc201ae 100644
--- a/core/lib/Drupal/Core/Render/Element/Form.php
+++ b/core/lib/Drupal/Core/Render/Element/Form.php
@@ -13,10 +13,10 @@ class Form extends RenderElement {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       '#method' => 'post',
-      '#theme_wrappers' => array('form'),
-    );
+      '#theme_wrappers' => ['form'],
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/FormElement.php b/core/lib/Drupal/Core/Render/Element/FormElement.php
index 513f103df9f4dab4b58e855f62023cd45046206f..0168d2beb964d4126f69e2941a7c972891eee028 100644
--- a/core/lib/Drupal/Core/Render/Element/FormElement.php
+++ b/core/lib/Drupal/Core/Render/Element/FormElement.php
@@ -108,7 +108,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
   public static function processPattern(&$element, FormStateInterface $form_state, &$complete_form) {
     if (isset($element['#pattern']) && !isset($element['#attributes']['pattern'])) {
       $element['#attributes']['pattern'] = $element['#pattern'];
-      $element['#element_validate'][] = array(get_called_class(), 'validatePattern');
+      $element['#element_validate'][] = [get_called_class(), 'validatePattern'];
     }
 
     return $element;
@@ -136,7 +136,7 @@ public static function validatePattern(&$element, FormStateInterface $form_state
       $pattern = '{^(?:' . $element['#pattern'] . ')$}';
 
       if (!preg_match($pattern, $element['#value'])) {
-        $form_state->setError($element, t('%name field is not in the right format.', array('%name' => $element['#title'])));
+        $form_state->setError($element, t('%name field is not in the right format.', ['%name' => $element['#title']]));
       }
     }
   }
@@ -178,7 +178,7 @@ public static function processAutocomplete(&$element, FormStateInterface $form_s
     $access = FALSE;
 
     if (!empty($element['#autocomplete_route_name'])) {
-      $parameters = isset($element['#autocomplete_route_parameters']) ? $element['#autocomplete_route_parameters'] : array();
+      $parameters = isset($element['#autocomplete_route_parameters']) ? $element['#autocomplete_route_parameters'] : [];
       $url = Url::fromRoute($element['#autocomplete_route_name'], $parameters)->toString(TRUE);
       /** @var \Drupal\Core\Access\AccessManagerInterface $access_manager */
       $access_manager = \Drupal::service('access_manager');
diff --git a/core/lib/Drupal/Core/Render/Element/Hidden.php b/core/lib/Drupal/Core/Render/Element/Hidden.php
index 8e1f8560a542d817fd18b4e0d80e14cd394227c4..6fb62ffc99567e1b98f5e3d746af91a67a159f62 100644
--- a/core/lib/Drupal/Core/Render/Element/Hidden.php
+++ b/core/lib/Drupal/Core/Render/Element/Hidden.php
@@ -31,16 +31,16 @@ class Hidden extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
-      '#process' => array(
-        array($class, 'processAjaxForm'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderHidden'),
-      ),
+      '#process' => [
+        [$class, 'processAjaxForm'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderHidden'],
+      ],
       '#theme' => 'input__hidden',
-    );
+    ];
   }
 
   /**
@@ -55,7 +55,7 @@ public function getInfo() {
    */
   public static function preRenderHidden($element) {
     $element['#attributes']['type'] = 'hidden';
-    Element::setAttributes($element, array('name', 'value'));
+    Element::setAttributes($element, ['name', 'value']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Html.php b/core/lib/Drupal/Core/Render/Element/Html.php
index 0a83d5609359221fe1017f6d07cdbebea8b0ca2e..fb79b94e9fe5fcc9a04f3aeef4e3247dbe084468 100644
--- a/core/lib/Drupal/Core/Render/Element/Html.php
+++ b/core/lib/Drupal/Core/Render/Element/Html.php
@@ -13,13 +13,13 @@ class Html extends RenderElement {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       '#theme' => 'html',
       // HTML5 Shiv
-      '#attached' => array(
-        'library' => array('core/html5shiv'),
-      ),
-    );
+      '#attached' => [
+        'library' => ['core/html5shiv'],
+      ],
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/HtmlTag.php b/core/lib/Drupal/Core/Render/Element/HtmlTag.php
index 1d71350fafcd5a63771f06c3fe40713548393e66..0b9ac91e4bc92d5c70770847ab5756512bc5dd7b 100644
--- a/core/lib/Drupal/Core/Render/Element/HtmlTag.php
+++ b/core/lib/Drupal/Core/Render/Element/HtmlTag.php
@@ -38,24 +38,24 @@ class HtmlTag extends RenderElement {
    * @see http://www.w3.org/TR/html5/syntax.html#syntax-start-tag
    * @see http://www.w3.org/TR/html5/syntax.html#void-elements
    */
-  static protected $voidElements = array(
+  static protected $voidElements = [
     'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input',
     'keygen', 'link', 'meta', 'param', 'source', 'track', 'wbr',
-  );
+  ];
 
   /**
    * {@inheritdoc}
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderConditionalComments'),
-        array($class, 'preRenderHtmlTag'),
-      ),
-      '#attributes' => array(),
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderConditionalComments'],
+        [$class, 'preRenderHtmlTag'],
+      ],
+      '#attributes' => [],
       '#value' => NULL,
-    );
+    ];
   }
 
   /**
@@ -132,11 +132,11 @@ public static function preRenderHtmlTag($element) {
    *   added to '#prefix' and '#suffix'.
    */
   public static function preRenderConditionalComments($element) {
-    $browsers = isset($element['#browsers']) ? $element['#browsers'] : array();
-    $browsers += array(
+    $browsers = isset($element['#browsers']) ? $element['#browsers'] : [];
+    $browsers += [
       'IE' => TRUE,
       '!IE' => TRUE,
-    );
+    ];
 
     // If rendering in all browsers, no need for conditional comments.
     if ($browsers['IE'] === TRUE && $browsers['!IE']) {
diff --git a/core/lib/Drupal/Core/Render/Element/ImageButton.php b/core/lib/Drupal/Core/Render/Element/ImageButton.php
index a7d8be37631699e386925cd9e86a6d6d145404a6..2404ba8084cf8046fc264df2e7ee79c13e39d931 100644
--- a/core/lib/Drupal/Core/Render/Element/ImageButton.php
+++ b/core/lib/Drupal/Core/Render/Element/ImageButton.php
@@ -19,12 +19,12 @@ public function getInfo() {
     $info = parent::getInfo();
     unset($info['name']);
 
-    return array(
+    return [
       '#return_value' => TRUE,
       '#has_garbage_value' => TRUE,
       '#src' => NULL,
-      '#theme_wrappers' => array('input__image_button'),
-    ) + $info;
+      '#theme_wrappers' => ['input__image_button'],
+    ] + $info;
   }
 
   /**
@@ -68,7 +68,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
    */
   public static function preRenderButton($element) {
     $element['#attributes']['type'] = 'image';
-    Element::setAttributes($element, array('id', 'name', 'value'));
+    Element::setAttributes($element, ['id', 'name', 'value']);
 
     $element['#attributes']['src'] = file_url_transform_relative(file_create_url($element['#src']));
     if (!empty($element['#title'])) {
diff --git a/core/lib/Drupal/Core/Render/Element/InlineTemplate.php b/core/lib/Drupal/Core/Render/Element/InlineTemplate.php
index 2fbdf433fdb4fa00102398d40388be9c24cc0de5..0005ea2740f4422a5dacbd7cf0d5ca6c4d8eee5b 100644
--- a/core/lib/Drupal/Core/Render/Element/InlineTemplate.php
+++ b/core/lib/Drupal/Core/Render/Element/InlineTemplate.php
@@ -30,13 +30,13 @@ class InlineTemplate extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderInlineTemplate'),
-      ),
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderInlineTemplate'],
+      ],
       '#template' => '',
-      '#context' => array(),
-    );
+      '#context' => [],
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Render/Element/Item.php b/core/lib/Drupal/Core/Render/Element/Item.php
index b952da1e90fdc9205e2a6a6f9e8818a6d941d188..6c282b3798b622fd0ca2bddadbdd853e00ae1d26 100644
--- a/core/lib/Drupal/Core/Render/Element/Item.php
+++ b/core/lib/Drupal/Core/Render/Element/Item.php
@@ -17,7 +17,7 @@ class Item extends FormElement {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       // Forms that show author fields to both anonymous and authenticated users
       // need to dynamically switch between #type 'textfield' and #type 'item'
       // to automatically take over the authenticated user's information.
@@ -25,8 +25,8 @@ public function getInfo() {
       // assigned by Form API based on the #default_value or #value properties.
       '#input' => TRUE,
       '#markup' => '',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/Label.php b/core/lib/Drupal/Core/Render/Element/Label.php
index 1dbaa70c8dd0131ee7e0e53aa176ad5dc6cbce9b..28eb6a0d4bbf6df8b1d780d050fbdf471a102956 100644
--- a/core/lib/Drupal/Core/Render/Element/Label.php
+++ b/core/lib/Drupal/Core/Render/Element/Label.php
@@ -17,9 +17,9 @@ class Label extends RenderElement {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       '#theme' => 'form_element_label',
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/LanguageSelect.php b/core/lib/Drupal/Core/Render/Element/LanguageSelect.php
index 0e6011d30533866fdb77d36d28c156fd4a5517fc..bd0a3c0a40f48c4e336f1b06221ecf4518957759 100644
--- a/core/lib/Drupal/Core/Render/Element/LanguageSelect.php
+++ b/core/lib/Drupal/Core/Render/Element/LanguageSelect.php
@@ -21,10 +21,10 @@ class LanguageSelect extends FormElement {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       '#input' => TRUE,
       '#default_value' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/Link.php b/core/lib/Drupal/Core/Render/Element/Link.php
index 3888c7938d043004ef2673650f0b27f24008c376..216f068a49d74a138f1b7804e2b34eab3ca10a06 100644
--- a/core/lib/Drupal/Core/Render/Element/Link.php
+++ b/core/lib/Drupal/Core/Render/Element/Link.php
@@ -33,11 +33,11 @@ class Link extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderLink'),
-      ),
-    );
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderLink'],
+      ],
+    ];
   }
 
   /**
@@ -58,12 +58,12 @@ public function getInfo() {
   public static function preRenderLink($element) {
     // By default, link options to pass to the link generator are normally set
     // in #options.
-    $element += array('#options' => array());
+    $element += ['#options' => []];
     // However, within the scope of renderable elements, #attributes is a valid
     // way to specify attributes, too. Take them into account, but do not override
     // attributes from #options.
     if (isset($element['#attributes'])) {
-      $element['#options'] += array('attributes' => array());
+      $element['#options'] += ['attributes' => []];
       $element['#options']['attributes'] += $element['#attributes'];
     }
 
diff --git a/core/lib/Drupal/Core/Render/Element/MachineName.php b/core/lib/Drupal/Core/Render/Element/MachineName.php
index 6cf455942a014967efea9a0b3b1b2988f45e2316..ace452b072578c49ebb341d1c7cbe5714908ac9e 100644
--- a/core/lib/Drupal/Core/Render/Element/MachineName.php
+++ b/core/lib/Drupal/Core/Render/Element/MachineName.php
@@ -75,27 +75,27 @@ class MachineName extends Textfield {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#default_value' => NULL,
       '#required' => TRUE,
       '#maxlength' => 64,
       '#size' => 60,
       '#autocomplete_route_name' => FALSE,
-      '#process' => array(
-        array($class, 'processMachineName'),
-        array($class, 'processAutocomplete'),
-        array($class, 'processAjaxForm'),
-      ),
-      '#element_validate' => array(
-        array($class, 'validateMachineName'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderTextfield'),
-      ),
+      '#process' => [
+        [$class, 'processMachineName'],
+        [$class, 'processAutocomplete'],
+        [$class, 'processAjaxForm'],
+      ],
+      '#element_validate' => [
+        [$class, 'validateMachineName'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderTextfield'],
+      ],
       '#theme' => 'input__textfield',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -128,19 +128,19 @@ public static function processMachineName(&$element, FormStateInterface $form_st
     $language = \Drupal::languageManager()->getCurrentLanguage();
 
     // Apply default form element properties.
-    $element += array(
+    $element += [
       '#title' => t('Machine-readable name'),
       '#description' => t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
-      '#machine_name' => array(),
+      '#machine_name' => [],
       '#field_prefix' => '',
       '#field_suffix' => '',
       '#suffix' => '',
-    );
+    ];
     // A form element that only wants to set one #machine_name property (usually
     // 'source' only) would leave all other properties undefined, if the defaults
     // were defined by an element plugin. Therefore, we apply the defaults here.
-    $element['#machine_name'] += array(
-      'source' => array('label'),
+    $element['#machine_name'] += [
+      'source' => ['label'],
       'target' => '#' . $element['#id'],
       'label' => t('Machine name'),
       'replace_pattern' => '[^a-z0-9_]+',
@@ -148,14 +148,14 @@ public static function processMachineName(&$element, FormStateInterface $form_st
       'standalone' => FALSE,
       'field_prefix' => $element['#field_prefix'],
       'field_suffix' => $element['#field_suffix'],
-    );
+    ];
 
     // By default, machine names are restricted to Latin alphanumeric characters.
     // So, default to LTR directionality.
     if (!isset($element['#attributes'])) {
-      $element['#attributes'] = array();
+      $element['#attributes'] = [];
     }
-    $element['#attributes'] += array('dir' => LanguageInterface::DIRECTION_LTR);
+    $element['#attributes'] += ['dir' => LanguageInterface::DIRECTION_LTR];
 
     // The source element defaults to array('name'), but may have been overridden.
     if (empty($element['#machine_name']['source'])) {
@@ -180,10 +180,10 @@ public static function processMachineName(&$element, FormStateInterface $form_st
     else {
       // Append a field suffix to the source form element, which will contain
       // the live preview of the machine name.
-      $source += array('#field_suffix' => '');
+      $source += ['#field_suffix' => ''];
       $source['#field_suffix'] = $source['#field_suffix'] . ' <small id="' . $suffix_id . '">&nbsp;</small>';
 
-      $parents = array_merge($element['#machine_name']['source'], array('#field_suffix'));
+      $parents = array_merge($element['#machine_name']['source'], ['#field_suffix']);
       NestedArray::setValue($form_state->getCompleteForm(), $parents, $source['#field_suffix']);
     }
 
diff --git a/core/lib/Drupal/Core/Render/Element/MoreLink.php b/core/lib/Drupal/Core/Render/Element/MoreLink.php
index 7c042b22cc402938bc19186eab3d7b3358f9fbec..596c66068ae493517466d51633a96e04d7f18db5 100644
--- a/core/lib/Drupal/Core/Render/Element/MoreLink.php
+++ b/core/lib/Drupal/Core/Render/Element/MoreLink.php
@@ -27,14 +27,14 @@ class MoreLink extends Link {
    */
   public function getInfo() {
     $info = parent::getInfo();
-    return array(
+    return [
       '#title' => $this->t('More'),
-      '#theme_wrappers' => array(
-        'container' => array(
-          '#attributes' => array('class' => array('more-link')),
-        ),
-      ),
-    ) + $info;
+      '#theme_wrappers' => [
+        'container' => [
+          '#attributes' => ['class' => ['more-link']],
+        ],
+      ],
+    ] + $info;
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/Number.php b/core/lib/Drupal/Core/Render/Element/Number.php
index 788aa1e6c773fee1e77954dd0ea45b15a4e4ed19..b7b25241260bcdd6d98e560eeb3aa6b506a54a3b 100644
--- a/core/lib/Drupal/Core/Render/Element/Number.php
+++ b/core/lib/Drupal/Core/Render/Element/Number.php
@@ -38,21 +38,21 @@ class Number extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#step' => 1,
-      '#process' => array(
-        array($class, 'processAjaxForm'),
-      ),
-      '#element_validate' => array(
-        array($class, 'validateNumber'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderNumber'),
-      ),
+      '#process' => [
+        [$class, 'processAjaxForm'],
+      ],
+      '#element_validate' => [
+        [$class, 'validateNumber'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderNumber'],
+      ],
       '#theme' => 'input__number',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -70,18 +70,18 @@ public static function validateNumber(&$element, FormStateInterface $form_state,
 
     // Ensure the input is numeric.
     if (!is_numeric($value)) {
-      $form_state->setError($element, t('%name must be a number.', array('%name' => $name)));
+      $form_state->setError($element, t('%name must be a number.', ['%name' => $name]));
       return;
     }
 
     // Ensure that the input is greater than the #min property, if set.
     if (isset($element['#min']) && $value < $element['#min']) {
-      $form_state->setError($element, t('%name must be higher than or equal to %min.', array('%name' => $name, '%min' => $element['#min'])));
+      $form_state->setError($element, t('%name must be higher than or equal to %min.', ['%name' => $name, '%min' => $element['#min']]));
     }
 
     // Ensure that the input is less than the #max property, if set.
     if (isset($element['#max']) && $value > $element['#max']) {
-      $form_state->setError($element, t('%name must be lower than or equal to %max.', array('%name' => $name, '%max' => $element['#max'])));
+      $form_state->setError($element, t('%name must be lower than or equal to %max.', ['%name' => $name, '%max' => $element['#max']]));
     }
 
     if (isset($element['#step']) && strtolower($element['#step']) != 'any') {
@@ -90,7 +90,7 @@ public static function validateNumber(&$element, FormStateInterface $form_state,
       $offset = isset($element['#min']) ? $element['#min'] : 0.0;
 
       if (!NumberUtility::validStep($value, $element['#step'], $offset)) {
-        $form_state->setError($element, t('%name is not a valid number.', array('%name' => $name)));
+        $form_state->setError($element, t('%name is not a valid number.', ['%name' => $name]));
       }
     }
   }
@@ -108,8 +108,8 @@ public static function validateNumber(&$element, FormStateInterface $form_state,
    */
   public static function preRenderNumber($element) {
     $element['#attributes']['type'] = 'number';
-    Element::setAttributes($element, array('id', 'name', 'value', 'step', 'min', 'max', 'placeholder', 'size'));
-    static::setAttributes($element, array('form-number'));
+    Element::setAttributes($element, ['id', 'name', 'value', 'step', 'min', 'max', 'placeholder', 'size']);
+    static::setAttributes($element, ['form-number']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Operations.php b/core/lib/Drupal/Core/Render/Element/Operations.php
index a0c972836aa64577e04a077e40e927155dc6b3b7..3a53cd7030b0b327dc53655881d2c808bc51158a 100644
--- a/core/lib/Drupal/Core/Render/Element/Operations.php
+++ b/core/lib/Drupal/Core/Render/Element/Operations.php
@@ -19,9 +19,9 @@ class Operations extends Dropbutton {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       '#theme' => 'links__dropbutton__operations',
-    ) + parent::getInfo();
+    ] + parent::getInfo();
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/Page.php b/core/lib/Drupal/Core/Render/Element/Page.php
index 7aeef85fe6a57ef4310f428249cac8b05b02c0d9..c7a4e070c3dfeb3176777b0a234ad4aeb32ea9b1 100644
--- a/core/lib/Drupal/Core/Render/Element/Page.php
+++ b/core/lib/Drupal/Core/Render/Element/Page.php
@@ -15,10 +15,10 @@ class Page extends RenderElement {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       '#theme' => 'page',
       '#title' => '',
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/Password.php b/core/lib/Drupal/Core/Render/Element/Password.php
index 06d5532e550947d3756152a5346862df77a5cfbe..4ba2058397dc01f6c455749c1a8c6b6daa6872ad 100644
--- a/core/lib/Drupal/Core/Render/Element/Password.php
+++ b/core/lib/Drupal/Core/Render/Element/Password.php
@@ -32,20 +32,20 @@ class Password extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#size' => 60,
       '#maxlength' => 128,
-      '#process' => array(
-        array($class, 'processAjaxForm'),
-        array($class, 'processPattern'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderPassword'),
-      ),
+      '#process' => [
+        [$class, 'processAjaxForm'],
+        [$class, 'processPattern'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderPassword'],
+      ],
       '#theme' => 'input__password',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -61,8 +61,8 @@ public function getInfo() {
    */
   public static function preRenderPassword($element) {
     $element['#attributes']['type'] = 'password';
-    Element::setAttributes($element, array('id', 'name', 'size', 'maxlength', 'placeholder'));
-    static::setAttributes($element, array('form-text'));
+    Element::setAttributes($element, ['id', 'name', 'size', 'maxlength', 'placeholder']);
+    static::setAttributes($element, ['form-text']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/PasswordConfirm.php b/core/lib/Drupal/Core/Render/Element/PasswordConfirm.php
index 0d5e0e2865ae39d43834e865b386ec706dfbd2af..07c31490f4d4ca03eb240c777b62f4781b461144 100644
--- a/core/lib/Drupal/Core/Render/Element/PasswordConfirm.php
+++ b/core/lib/Drupal/Core/Render/Element/PasswordConfirm.php
@@ -33,14 +33,14 @@ class PasswordConfirm extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#markup' => '',
-      '#process' => array(
-        array($class, 'processPasswordConfirm'),
-      ),
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#process' => [
+        [$class, 'processPasswordConfirm'],
+      ],
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -68,23 +68,23 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
    * Expand a password_confirm field into two text boxes.
    */
   public static function processPasswordConfirm(&$element, FormStateInterface $form_state, &$complete_form) {
-    $element['pass1'] = array(
+    $element['pass1'] = [
       '#type' => 'password',
       '#title' => t('Password'),
       '#value' => empty($element['#value']) ? NULL : $element['#value']['pass1'],
       '#required' => $element['#required'],
-      '#attributes' => array('class' => array('password-field', 'js-password-field')),
+      '#attributes' => ['class' => ['password-field', 'js-password-field']],
       '#error_no_message' => TRUE,
-    );
-    $element['pass2'] = array(
+    ];
+    $element['pass2'] = [
       '#type' => 'password',
       '#title' => t('Confirm password'),
       '#value' => empty($element['#value']) ? NULL : $element['#value']['pass2'],
       '#required' => $element['#required'],
-      '#attributes' => array('class' => array('password-confirm', 'js-password-confirm')),
+      '#attributes' => ['class' => ['password-confirm', 'js-password-confirm']],
       '#error_no_message' => TRUE,
-    );
-    $element['#element_validate'] = array(array(get_called_class(), 'validatePasswordConfirm'));
+    ];
+    $element['#element_validate'] = [[get_called_class(), 'validatePasswordConfirm']];
     $element['#tree'] = TRUE;
 
     if (isset($element['#size'])) {
diff --git a/core/lib/Drupal/Core/Render/Element/PathElement.php b/core/lib/Drupal/Core/Render/Element/PathElement.php
index ee466ef559c8ab0f88ca9acddfee309dfc11faf2..b08dbc7ea2f41d53fe9e367cadab16440dab887d 100644
--- a/core/lib/Drupal/Core/Render/Element/PathElement.php
+++ b/core/lib/Drupal/Core/Render/Element/PathElement.php
@@ -38,9 +38,9 @@ public function getInfo() {
     $class = get_class($this);
     $info['#validate_path'] = TRUE;
     $info['#convert_path'] = self::CONVERT_ROUTE;
-    $info['#element_validate'] = array(
-      array($class, 'validateMatchedPath'),
-    );
+    $info['#element_validate'] = [
+      [$class, 'validateMatchedPath'],
+    ];
     return $info;
   }
 
@@ -73,10 +73,10 @@ public static function validateMatchedPath(&$element, FormStateInterface $form_s
         // We do the value conversion here whilst the Url object is in scope
         // after validation has occurred.
         if ($element['#convert_path'] == self::CONVERT_ROUTE) {
-          $form_state->setValueForElement($element, array(
+          $form_state->setValueForElement($element, [
             'route_name' => $url->getRouteName(),
             'route_parameters' => $url->getRouteParameters(),
-          ));
+          ]);
           return;
         }
         elseif ($element['#convert_path'] == self::CONVERT_URL) {
@@ -84,9 +84,9 @@ public static function validateMatchedPath(&$element, FormStateInterface $form_s
           return;
         }
       }
-      $form_state->setError($element, t('This path does not exist or you do not have permission to link to %path.', array(
+      $form_state->setError($element, t('This path does not exist or you do not have permission to link to %path.', [
         '%path' => $element['#value'],
-      )));
+      ]));
     }
   }
 
diff --git a/core/lib/Drupal/Core/Render/Element/Radio.php b/core/lib/Drupal/Core/Render/Element/Radio.php
index ae20284b9f7897f4e33d810c32af0358c6ac1163..8687a9dcfc980cf85a367b752db3566f7f30cc67 100644
--- a/core/lib/Drupal/Core/Render/Element/Radio.php
+++ b/core/lib/Drupal/Core/Render/Element/Radio.php
@@ -22,19 +22,19 @@ class Radio extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#default_value' => NULL,
-      '#process' => array(
-        array($class, 'processAjaxForm'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderRadio'),
-      ),
+      '#process' => [
+        [$class, 'processAjaxForm'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderRadio'],
+      ],
       '#theme' => 'input__radio',
-      '#theme_wrappers' => array('form_element'),
+      '#theme_wrappers' => ['form_element'],
       '#title_display' => 'after',
-    );
+    ];
   }
 
   /**
@@ -52,12 +52,12 @@ public function getInfo() {
    */
   public static function preRenderRadio($element) {
     $element['#attributes']['type'] = 'radio';
-    Element::setAttributes($element, array('id', 'name', '#return_value' => 'value'));
+    Element::setAttributes($element, ['id', 'name', '#return_value' => 'value']);
 
     if (isset($element['#return_value']) && $element['#value'] !== FALSE && $element['#value'] == $element['#return_value']) {
       $element['#attributes']['checked'] = 'checked';
     }
-    static::setAttributes($element, array('form-radio'));
+    static::setAttributes($element, ['form-radio']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Radios.php b/core/lib/Drupal/Core/Render/Element/Radios.php
index e7179f479c2e00be6095c49e106e4ed08a7d3a3b..2c9797a3c13231a7e0d22e017be6851564f3c66d 100644
--- a/core/lib/Drupal/Core/Render/Element/Radios.php
+++ b/core/lib/Drupal/Core/Render/Element/Radios.php
@@ -37,16 +37,16 @@ class Radios extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
-      '#process' => array(
-        array($class, 'processRadios'),
-      ),
-      '#theme_wrappers' => array('radios'),
-      '#pre_render' => array(
-        array($class, 'preRenderCompositeFormElement'),
-      ),
-    );
+      '#process' => [
+        [$class, 'processRadios'],
+      ],
+      '#theme_wrappers' => ['radios'],
+      '#pre_render' => [
+        [$class, 'preRenderCompositeFormElement'],
+      ],
+    ];
   }
 
   /**
@@ -61,11 +61,11 @@ public static function processRadios(&$element, FormStateInterface $form_state,
         // sub-elements.
         $weight += 0.001;
 
-        $element += array($key => array());
+        $element += [$key => []];
         // Generate the parents as the autogenerator does, so we will have a
         // unique id for each radio button.
-        $parents_for_id = array_merge($element['#parents'], array($key));
-        $element[$key] += array(
+        $parents_for_id = array_merge($element['#parents'], [$key]);
+        $element[$key] += [
           '#type' => 'radio',
           '#title' => $choice,
           // The key is sanitized in Drupal\Core\Template\Attribute during output
@@ -81,7 +81,7 @@ public static function processRadios(&$element, FormStateInterface $form_state,
           // Errors should only be shown on the parent radios element.
           '#error_no_message' => TRUE,
           '#weight' => $weight,
-        );
+        ];
       }
     }
     return $element;
diff --git a/core/lib/Drupal/Core/Render/Element/Range.php b/core/lib/Drupal/Core/Render/Element/Range.php
index d28d787c2acbee02f7625bd7977489d3394b1bd8..24595abdd69e3bb3aa5a2dbae6343b958a98046a 100644
--- a/core/lib/Drupal/Core/Render/Element/Range.php
+++ b/core/lib/Drupal/Core/Render/Element/Range.php
@@ -35,14 +35,14 @@ class Range extends Number {
   public function getInfo() {
     $info = parent::getInfo();
     $class = get_class($this);
-    return array(
+    return [
       '#min' => 0,
       '#max' => 100,
-      '#pre_render' => array(
-        array($class, 'preRenderRange'),
-      ),
+      '#pre_render' => [
+        [$class, 'preRenderRange'],
+      ],
       '#theme' => 'input__range',
-    ) + $info;
+    ] + $info;
   }
 
   /**
@@ -58,8 +58,8 @@ public function getInfo() {
    */
   public static function preRenderRange($element) {
     $element['#attributes']['type'] = 'range';
-    Element::setAttributes($element, array('id', 'name', 'value', 'step', 'min', 'max'));
-    static::setAttributes($element, array('form-range'));
+    Element::setAttributes($element, ['id', 'name', 'value', 'step', 'min', 'max']);
+    static::setAttributes($element, ['form-range']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/RenderElement.php b/core/lib/Drupal/Core/Render/Element/RenderElement.php
index 1f39e1050eabaa19aad7e065ec5801741322b889..243a9af7671063ac347db6881e50bee110e6791c 100644
--- a/core/lib/Drupal/Core/Render/Element/RenderElement.php
+++ b/core/lib/Drupal/Core/Render/Element/RenderElement.php
@@ -126,10 +126,10 @@ abstract class RenderElement extends PluginBase implements ElementInterface {
   /**
    * {@inheritdoc}
    */
-  public static function setAttributes(&$element, $class = array()) {
+  public static function setAttributes(&$element, $class = []) {
     if (!empty($class)) {
       if (!isset($element['#attributes']['class'])) {
-        $element['#attributes']['class'] = array();
+        $element['#attributes']['class'] = [];
       }
       $element['#attributes']['class'] = array_merge($element['#attributes']['class'], $class);
     }
@@ -398,7 +398,7 @@ public static function preRenderAjaxForm($element) {
 
       // Convert a simple #ajax['progress'] string into an array.
       if (isset($settings['progress']) && is_string($settings['progress'])) {
-        $settings['progress'] = array('type' => $settings['progress']);
+        $settings['progress'] = ['type' => $settings['progress']];
       }
       // Change progress path to a full URL.
       if (isset($settings['progress']['url']) && $settings['progress']['url'] instanceof Url) {
diff --git a/core/lib/Drupal/Core/Render/Element/Search.php b/core/lib/Drupal/Core/Render/Element/Search.php
index 45333c5da413e1a06c093583c09d666f7dd5221d..01db3b7ecc4353311c5ce9d6b59fbd10782c4fc7 100644
--- a/core/lib/Drupal/Core/Render/Element/Search.php
+++ b/core/lib/Drupal/Core/Render/Element/Search.php
@@ -26,21 +26,21 @@ class Search extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#size' => 60,
       '#maxlength' => 128,
       '#autocomplete_route_name' => FALSE,
-      '#process' => array(
-        array($class, 'processAutocomplete'),
-        array($class, 'processAjaxForm'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderSearch'),
-      ),
+      '#process' => [
+        [$class, 'processAutocomplete'],
+        [$class, 'processAjaxForm'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderSearch'],
+      ],
       '#theme' => 'input__search',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -56,8 +56,8 @@ public function getInfo() {
    */
   public static function preRenderSearch($element) {
     $element['#attributes']['type'] = 'search';
-    Element::setAttributes($element, array('id', 'name', 'value', 'size', 'maxlength', 'placeholder'));
-    static::setAttributes($element, array('form-search'));
+    Element::setAttributes($element, ['id', 'name', 'value', 'size', 'maxlength', 'placeholder']);
+    static::setAttributes($element, ['form-search']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Select.php b/core/lib/Drupal/Core/Render/Element/Select.php
index b1e0f4ab686649fa0ecc49c4db3fadb757bc0059..300c244fc123113918ec23357df9a9c116c1b3d4 100644
--- a/core/lib/Drupal/Core/Render/Element/Select.php
+++ b/core/lib/Drupal/Core/Render/Element/Select.php
@@ -65,20 +65,20 @@ class Select extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#multiple' => FALSE,
-      '#process' => array(
-        array($class, 'processSelect'),
-        array($class, 'processAjaxForm'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderSelect'),
-      ),
+      '#process' => [
+        [$class, 'processSelect'],
+        [$class, 'processAjaxForm'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderSelect'],
+      ],
       '#theme' => 'select',
-      '#theme_wrappers' => array('form_element'),
-      '#options' => array(),
-    );
+      '#theme_wrappers' => ['form_element'],
+      '#options' => [],
+    ];
   }
 
   /**
@@ -118,14 +118,14 @@ public static function processSelect(&$element, FormStateInterface $form_state,
       // make a choice. Also, if there's a value for #empty_value or
       // #empty_option, then add an option that represents emptiness.
       if (($required && !isset($element['#default_value'])) || isset($element['#empty_value']) || isset($element['#empty_option'])) {
-        $element += array(
+        $element += [
           '#empty_value' => '',
           '#empty_option' => $required ? t('- Select -') : t('- None -'),
-        );
+        ];
         // The empty option is prepended to #options and purposively not merged
         // to prevent another option in #options mistakenly using the same value
         // as #empty_value.
-        $empty_option = array($element['#empty_value'] => $element['#empty_option']);
+        $empty_option = [$element['#empty_value'] => $element['#empty_option']];
         $element['#options'] = $empty_option + $element['#options'];
       }
     }
@@ -142,10 +142,10 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
         // unselected. A disabled multi-select always submits NULL, and the
         // default value should be used.
         if (empty($element['#disabled'])) {
-          return (is_array($input)) ? array_combine($input, $input) : array();
+          return (is_array($input)) ? array_combine($input, $input) : [];
         }
         else {
-          return (isset($element['#default_value']) && is_array($element['#default_value'])) ? $element['#default_value'] : array();
+          return (isset($element['#default_value']) && is_array($element['#default_value'])) ? $element['#default_value'] : [];
         }
       }
       // Non-multiple select elements may have an empty option prepended to them
@@ -167,8 +167,8 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
    * Prepares a select render element.
    */
   public static function preRenderSelect($element) {
-    Element::setAttributes($element, array('id', 'name', 'size'));
-    static::setAttributes($element, array('form-select'));
+    Element::setAttributes($element, ['id', 'name', 'size']);
+    static::setAttributes($element, ['form-select']);
     return $element;
   }
 
diff --git a/core/lib/Drupal/Core/Render/Element/Submit.php b/core/lib/Drupal/Core/Render/Element/Submit.php
index 4fa52bd1f0d32b56c881a5ebc3b08fd958069aa2..4ac7685a599e7256f7a44096cc8bd572947be3eb 100644
--- a/core/lib/Drupal/Core/Render/Element/Submit.php
+++ b/core/lib/Drupal/Core/Render/Element/Submit.php
@@ -32,9 +32,9 @@ class Submit extends Button {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       '#executes_submit_callback' => TRUE,
-    ) + parent::getInfo();
+    ] + parent::getInfo();
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/SystemCompactLink.php b/core/lib/Drupal/Core/Render/Element/SystemCompactLink.php
index 455113d4bf4d10c472fc7e7b3b469a0d540a0785..89f39a8460c14017f25ca6618a8caa5f470a72df 100644
--- a/core/lib/Drupal/Core/Render/Element/SystemCompactLink.php
+++ b/core/lib/Drupal/Core/Render/Element/SystemCompactLink.php
@@ -24,17 +24,17 @@ class SystemCompactLink extends Link {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderCompactLink'),
-        array($class, 'preRenderLink'),
-      ),
-      '#theme_wrappers' => array(
-        'container' => array(
-          '#attributes' => array('class' => array('compact-link')),
-        ),
-      ),
-    );
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderCompactLink'],
+        [$class, 'preRenderLink'],
+      ],
+      '#theme_wrappers' => [
+        'container' => [
+          '#attributes' => ['class' => ['compact-link']],
+        ],
+      ],
+    ];
   }
 
   /**
@@ -58,23 +58,23 @@ public function getInfo() {
    */
   public static function preRenderCompactLink($element) {
     // By default, link options to pass to l() are normally set in #options.
-    $element += array('#options' => array());
+    $element += ['#options' => []];
 
     if (system_admin_compact_mode()) {
       $element['#title'] = t('Show descriptions');
-      $element['#url'] = BaseUrl::fromRoute('system.admin_compact_page', array('mode' => 'off'));
-      $element['#options'] = array(
-        'attributes' => array('title' => t('Expand layout to include descriptions.')),
+      $element['#url'] = BaseUrl::fromRoute('system.admin_compact_page', ['mode' => 'off']);
+      $element['#options'] = [
+        'attributes' => ['title' => t('Expand layout to include descriptions.')],
         'query' => \Drupal::destination()->getAsArray()
-      );
+      ];
     }
     else {
       $element['#title'] = t('Hide descriptions');
-      $element['#url'] = BaseUrl::fromRoute('system.admin_compact_page', array('mode' => 'on'));
-      $element['#options'] = array(
-        'attributes' => array('title' => t('Compress layout by hiding descriptions.')),
+      $element['#url'] = BaseUrl::fromRoute('system.admin_compact_page', ['mode' => 'on']);
+      $element['#options'] = [
+        'attributes' => ['title' => t('Compress layout by hiding descriptions.')],
         'query' => \Drupal::destination()->getAsArray(),
-      );
+      ];
     }
 
     $options = NestedArray::mergeDeep($element['#url']->getOptions(), $element['#options']);
diff --git a/core/lib/Drupal/Core/Render/Element/Table.php b/core/lib/Drupal/Core/Render/Element/Table.php
index 298a27fa651a4b3ad70e26cbc4b5f9a58b472e44..c6c08b106645bbb0ea5c2be745c70d98efe94915 100644
--- a/core/lib/Drupal/Core/Render/Element/Table.php
+++ b/core/lib/Drupal/Core/Render/Element/Table.php
@@ -65,9 +65,9 @@ class Table extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#header' => array(),
-      '#rows' => array(),
+    return [
+      '#header' => [],
+      '#rows' => [],
       '#empty' => '',
       // Properties for tableselect support.
       '#input' => TRUE,
@@ -77,24 +77,24 @@ public function getInfo() {
       '#responsive' => TRUE,
       '#multiple' => TRUE,
       '#js_select' => TRUE,
-      '#process' => array(
-        array($class, 'processTable'),
-      ),
-      '#element_validate' => array(
-        array($class, 'validateTable'),
-      ),
+      '#process' => [
+        [$class, 'processTable'],
+      ],
+      '#element_validate' => [
+        [$class, 'validateTable'],
+      ],
       // Properties for tabledrag support.
       // The value is a list of arrays that are passed to
       // drupal_attach_tabledrag(). Table::preRenderTable() prepends the HTML ID
       // of the table to each set of options.
       // @see drupal_attach_tabledrag()
-      '#tabledrag' => array(),
+      '#tabledrag' => [],
       // Render properties.
-      '#pre_render' => array(
-        array($class, 'preRenderTable'),
-      ),
+      '#pre_render' => [
+        [$class, 'preRenderTable'],
+      ],
       '#theme' => 'table',
-    );
+    ];
   }
 
   /**
@@ -108,12 +108,12 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
       // #default_value property.
       // @todo D8: Remove this inconsistency.
       if ($input === FALSE) {
-        $element += array('#default_value' => array());
+        $element += ['#default_value' => []];
         $value = array_keys(array_filter($element['#default_value']));
         return array_combine($value, $value);
       }
       else {
-        return is_array($input) ? array_combine($input, $input) : array();
+        return is_array($input) ? array_combine($input, $input) : [];
       }
     }
   }
@@ -135,7 +135,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
   public static function processTable(&$element, FormStateInterface $form_state, &$complete_form) {
     if ($element['#tableselect']) {
       if ($element['#multiple']) {
-        $value = is_array($element['#value']) ? $element['#value'] : array();
+        $value = is_array($element['#value']) ? $element['#value'] : [];
       }
       // Advanced selection behavior makes no sense for radios.
       else {
@@ -145,7 +145,7 @@ public static function processTable(&$element, FormStateInterface $form_state, &
       // @todo D8: Rename into #select_all?
       if ($element['#js_select']) {
         $element['#attached']['library'][] = 'core/drupal.tableselect';
-        array_unshift($element['#header'], array('class' => array('select-all')));
+        array_unshift($element['#header'], ['class' => ['select-all']]);
       }
       // Add an empty header column for radio buttons or when a "Select all"
       // checkbox is not desired.
@@ -154,7 +154,7 @@ public static function processTable(&$element, FormStateInterface $form_state, &
       }
 
       if (!isset($element['#default_value']) || $element['#default_value'] === 0) {
-        $element['#default_value'] = array();
+        $element['#default_value'] = [];
       }
       // Create a checkbox or radio for each row in a way that the value of the
       // tableselect element behaves as if it had been of #type checkboxes or
@@ -165,7 +165,7 @@ public static function processTable(&$element, FormStateInterface $form_state, &
         // Their values have to be located in child keys (#tree is ignored),
         // since Table::validateTable() has to be able to validate whether input
         // (for the parent #type 'table' element) has been submitted.
-        $element_parents = array_merge($element['#parents'], array($key));
+        $element_parents = array_merge($element['#parents'], [$key]);
 
         // Since the #parents of the tableselect form element will equal the
         // #parents of the row element, prevent FormBuilder from auto-generating
@@ -202,23 +202,23 @@ public static function processTable(&$element, FormStateInterface $form_state, &
               }
             }
             if (isset($title) && $title !== '') {
-              $title = t('Update @title', array('@title' => $title));
+              $title = t('Update @title', ['@title' => $title]);
             }
           }
 
           // Prepend the select column to existing columns.
-          $row = array('select' => array()) + $row;
-          $row['select'] += array(
+          $row = ['select' => []] + $row;
+          $row['select'] += [
             '#type' => $element['#multiple'] ? 'checkbox' : 'radio',
             '#id' => HtmlUtility::getUniqueId('edit-' . implode('-', $element_parents)),
             // @todo If rows happen to use numeric indexes instead of string keys,
             //   this results in a first row with $key === 0, which is always FALSE.
             '#return_value' => $key,
             '#attributes' => $element['#attributes'],
-            '#wrapper_attributes' => array(
-              'class' => array('table-select'),
-            ),
-          );
+            '#wrapper_attributes' => [
+              'class' => ['table-select'],
+            ],
+          ];
           if ($element['#multiple']) {
             $row['select']['#default_value'] = isset($value[$key]) ? $key : NULL;
             $row['select']['#parents'] = $element_parents;
@@ -339,7 +339,7 @@ public static function validateTable(&$element, FormStateInterface $form_state,
    */
   public static function preRenderTable($element) {
     foreach (Element::children($element) as $first) {
-      $row = array('data' => array());
+      $row = ['data' => []];
       // Apply attributes of first-level elements as table row attributes.
       if (isset($element[$first]['#attributes'])) {
         $row += $element[$first]['#attributes'];
@@ -350,7 +350,7 @@ public static function preRenderTable($element) {
       foreach (Element::children($element[$first]) as $second) {
         // Assign the element by reference, so any potential changes to the
         // original element are taken over.
-        $column = array('data' => &$element[$first][$second]);
+        $column = ['data' => &$element[$first][$second]];
 
         // Apply wrapper attributes of second-level elements as table cell
         // attributes.
@@ -364,7 +364,7 @@ public static function preRenderTable($element) {
     }
 
     // Take over $element['#id'] as HTML ID attribute, if not already set.
-    Element::setAttributes($element, array('id'));
+    Element::setAttributes($element, ['id']);
 
     // Add sticky headers, if applicable.
     if (count($element['#header']) && $element['#sticky']) {
diff --git a/core/lib/Drupal/Core/Render/Element/Tableselect.php b/core/lib/Drupal/Core/Render/Element/Tableselect.php
index faa288e47434e0766b67d7cdb6ef05c467cab94e..a8f0e9596c4a81f73a27fe63bc6371d911f69e3d 100644
--- a/core/lib/Drupal/Core/Render/Element/Tableselect.php
+++ b/core/lib/Drupal/Core/Render/Element/Tableselect.php
@@ -57,23 +57,23 @@ class Tableselect extends Table {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#js_select' => TRUE,
       '#multiple' => TRUE,
       '#responsive' => TRUE,
       '#sticky' => FALSE,
-      '#pre_render' => array(
-        array($class, 'preRenderTable'),
-        array($class, 'preRenderTableselect'),
-      ),
-      '#process' => array(
-        array($class, 'processTableselect'),
-      ),
-      '#options' => array(),
+      '#pre_render' => [
+        [$class, 'preRenderTable'],
+        [$class, 'preRenderTableselect'],
+      ],
+      '#process' => [
+        [$class, 'processTableselect'],
+      ],
+      '#options' => [],
       '#empty' => '',
       '#theme' => 'table__tableselect',
-    );
+    ];
   }
 
   /**
@@ -87,8 +87,8 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
       // keys of the #default_value property. This differs from the checkboxes
       // element which uses the array values.
       if ($input === FALSE) {
-        $value = array();
-        $element += array('#default_value' => array());
+        $value = [];
+        $element += ['#default_value' => []];
         foreach ($element['#default_value'] as $key => $flag) {
           if ($flag) {
             $value[$key] = $key;
@@ -97,7 +97,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
         return $value;
       }
       else {
-        return is_array($input) ? array_combine($input, $input) : array();
+        return is_array($input) ? array_combine($input, $input) : [];
       }
     }
   }
@@ -147,14 +147,14 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
    *   The processed element.
    */
   public static function preRenderTableselect($element) {
-    $rows = array();
+    $rows = [];
     $header = $element['#header'];
     if (!empty($element['#options'])) {
       // Generate a table row for each selectable item in #options.
       foreach (Element::children($element) as $key) {
-        $row = array();
+        $row = [];
 
-        $row['data'] = array();
+        $row['data'] = [];
         if (isset($element['#options'][$key]['#attributes'])) {
           $row += $element['#options'][$key]['#attributes'];
         }
@@ -187,7 +187,7 @@ public static function preRenderTableselect($element) {
       if ($element['#js_select']) {
         // Add a "Select all" checkbox.
         $element['#attached']['library'][] = 'core/drupal.tableselect';
-        array_unshift($header, array('class' => array('select-all')));
+        array_unshift($header, ['class' => ['select-all']]);
       }
       else {
         // Add an empty header when radio buttons are displayed or a "Select all"
@@ -218,7 +218,7 @@ public static function preRenderTableselect($element) {
    */
   public static function processTableselect(&$element, FormStateInterface $form_state, &$complete_form) {
     if ($element['#multiple']) {
-      $value = is_array($element['#value']) ? $element['#value'] : array();
+      $value = is_array($element['#value']) ? $element['#value'] : [];
     }
     else {
       // Advanced selection behavior makes no sense for radios.
@@ -229,7 +229,7 @@ public static function processTableselect(&$element, FormStateInterface $form_st
 
     if (count($element['#options']) > 0) {
       if (!isset($element['#default_value']) || $element['#default_value'] === 0) {
-        $element['#default_value'] = array();
+        $element['#default_value'] = [];
       }
 
       // Create a checkbox or radio for each item in #options in such a way that
@@ -242,12 +242,12 @@ public static function processTableselect(&$element, FormStateInterface $form_st
             $title = '';
             if (isset($element['#options'][$key]['title']) && is_array($element['#options'][$key]['title'])) {
               if (!empty($element['#options'][$key]['title']['data']['#title'])) {
-                $title = new TranslatableMarkup('Update @title', array(
+                $title = new TranslatableMarkup('Update @title', [
                   '@title' => $element['#options'][$key]['title']['data']['#title'],
-                ));
+                ]);
               }
             }
-            $element[$key] = array(
+            $element[$key] = [
               '#type' => 'checkbox',
               '#title' => $title,
               '#title_display' => 'invisible',
@@ -255,13 +255,13 @@ public static function processTableselect(&$element, FormStateInterface $form_st
               '#default_value' => isset($value[$key]) ? $key : NULL,
               '#attributes' => $element['#attributes'],
               '#ajax' => isset($element['#ajax']) ? $element['#ajax'] : NULL,
-            );
+            ];
           }
           else {
             // Generate the parents as the autogenerator does, so we will have a
             // unique id for each radio button.
-            $parents_for_id = array_merge($element['#parents'], array($key));
-            $element[$key] = array(
+            $parents_for_id = array_merge($element['#parents'], [$key]);
+            $element[$key] = [
               '#type' => 'radio',
               '#title' => '',
               '#return_value' => $key,
@@ -270,7 +270,7 @@ public static function processTableselect(&$element, FormStateInterface $form_st
               '#parents' => $element['#parents'],
               '#id' => HtmlUtility::getUniqueId('edit-' . implode('-', $parents_for_id)),
               '#ajax' => isset($element['#ajax']) ? $element['#ajax'] : NULL,
-            );
+            ];
           }
           if (isset($element['#options'][$key]['#weight'])) {
             $element[$key]['#weight'] = $element['#options'][$key]['#weight'];
@@ -279,7 +279,7 @@ public static function processTableselect(&$element, FormStateInterface $form_st
       }
     }
     else {
-      $element['#value'] = array();
+      $element['#value'] = [];
     }
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Tel.php b/core/lib/Drupal/Core/Render/Element/Tel.php
index 09093938420fff7157470f23ab545b39fc8af3f2..9289a1d028ce711b50af325ec196b37504a27bf1 100644
--- a/core/lib/Drupal/Core/Render/Element/Tel.php
+++ b/core/lib/Drupal/Core/Render/Element/Tel.php
@@ -32,22 +32,22 @@ class Tel extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#size' => 30,
       '#maxlength' => 128,
       '#autocomplete_route_name' => FALSE,
-      '#process' => array(
-        array($class, 'processAutocomplete'),
-        array($class, 'processAjaxForm'),
-        array($class, 'processPattern'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderTel'),
-      ),
+      '#process' => [
+        [$class, 'processAutocomplete'],
+        [$class, 'processAjaxForm'],
+        [$class, 'processPattern'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderTel'],
+      ],
       '#theme' => 'input__tel',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -63,8 +63,8 @@ public function getInfo() {
    */
   public static function preRenderTel($element) {
     $element['#attributes']['type'] = 'tel';
-    Element::setAttributes($element, array('id', 'name', 'value', 'size', 'maxlength', 'placeholder'));
-    static::setAttributes($element, array('form-tel'));
+    Element::setAttributes($element, ['id', 'name', 'value', 'size', 'maxlength', 'placeholder']);
+    static::setAttributes($element, ['form-tel']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Textarea.php b/core/lib/Drupal/Core/Render/Element/Textarea.php
index f9286ea64f650572761ee9fc07995abae880aa12..340bc114e602f680bf9b7699626418fc592b1220 100644
--- a/core/lib/Drupal/Core/Render/Element/Textarea.php
+++ b/core/lib/Drupal/Core/Render/Element/Textarea.php
@@ -33,21 +33,21 @@ class Textarea extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#cols' => 60,
       '#rows' => 5,
       '#resizable' => 'vertical',
-      '#process' => array(
-        array($class, 'processAjaxForm'),
-        array($class, 'processGroup'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderGroup'),
-      ),
+      '#process' => [
+        [$class, 'processAjaxForm'],
+        [$class, 'processGroup'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderGroup'],
+      ],
       '#theme' => 'textarea',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Render/Element/Textfield.php b/core/lib/Drupal/Core/Render/Element/Textfield.php
index 1cb35e8a34c479c40eb68dbf77987e5253fa4f32..0bdc294a096b8ded27c23d9ce3d7ed06f2316c5f 100644
--- a/core/lib/Drupal/Core/Render/Element/Textfield.php
+++ b/core/lib/Drupal/Core/Render/Element/Textfield.php
@@ -47,24 +47,24 @@ class Textfield extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#size' => 60,
       '#maxlength' => 128,
       '#autocomplete_route_name' => FALSE,
-      '#process' => array(
-        array($class, 'processAutocomplete'),
-        array($class, 'processAjaxForm'),
-        array($class, 'processPattern'),
-        array($class, 'processGroup'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderTextfield'),
-        array($class, 'preRenderGroup'),
-      ),
+      '#process' => [
+        [$class, 'processAutocomplete'],
+        [$class, 'processAjaxForm'],
+        [$class, 'processPattern'],
+        [$class, 'processGroup'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderTextfield'],
+        [$class, 'preRenderGroup'],
+      ],
       '#theme' => 'input__textfield',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -77,7 +77,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
       if (!is_scalar($input)) {
         $input = '';
       }
-      return str_replace(array("\r", "\n"), '', $input);
+      return str_replace(["\r", "\n"], '', $input);
     }
     return NULL;
   }
@@ -95,8 +95,8 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
    */
   public static function preRenderTextfield($element) {
     $element['#attributes']['type'] = 'text';
-    Element::setAttributes($element, array('id', 'name', 'value', 'size', 'maxlength', 'placeholder'));
-    static::setAttributes($element, array('form-text'));
+    Element::setAttributes($element, ['id', 'name', 'value', 'size', 'maxlength', 'placeholder']);
+    static::setAttributes($element, ['form-text']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Token.php b/core/lib/Drupal/Core/Render/Element/Token.php
index 2f9e03add50e91f5f21ddf4610cccf9abd1fe76a..aa244356cc5d18f6088c5c29c09c0819b7626500 100644
--- a/core/lib/Drupal/Core/Render/Element/Token.php
+++ b/core/lib/Drupal/Core/Render/Element/Token.php
@@ -21,13 +21,13 @@ class Token extends Hidden {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
-      '#pre_render' => array(
-        array($class, 'preRenderHidden'),
-      ),
+      '#pre_render' => [
+        [$class, 'preRenderHidden'],
+      ],
       '#theme' => 'input__hidden',
-    );
+    ];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Render/Element/Url.php b/core/lib/Drupal/Core/Render/Element/Url.php
index c66cadc638711e1af6ae8e8845ddf7ed2dd4598e..c3574b095ef089d1b9c5b14f58b179555b5934bb 100644
--- a/core/lib/Drupal/Core/Render/Element/Url.php
+++ b/core/lib/Drupal/Core/Render/Element/Url.php
@@ -34,25 +34,25 @@ class Url extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#size' => 60,
       '#maxlength' => 255,
       '#autocomplete_route_name' => FALSE,
-      '#process' => array(
-        array($class, 'processAutocomplete'),
-        array($class, 'processAjaxForm'),
-        array($class, 'processPattern'),
-      ),
-      '#element_validate' => array(
-        array($class, 'validateUrl'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderUrl'),
-      ),
+      '#process' => [
+        [$class, 'processAutocomplete'],
+        [$class, 'processAjaxForm'],
+        [$class, 'processPattern'],
+      ],
+      '#element_validate' => [
+        [$class, 'validateUrl'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderUrl'],
+      ],
       '#theme' => 'input__url',
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
   }
 
   /**
@@ -65,7 +65,7 @@ public static function validateUrl(&$element, FormStateInterface $form_state, &$
     $form_state->setValueForElement($element, $value);
 
     if ($value !== '' && !UrlHelper::isValid($value, TRUE)) {
-      $form_state->setError($element, t('The URL %url is not valid.', array('%url' => $value)));
+      $form_state->setError($element, t('The URL %url is not valid.', ['%url' => $value]));
     }
   }
 
@@ -82,8 +82,8 @@ public static function validateUrl(&$element, FormStateInterface $form_state, &$
    */
   public static function preRenderUrl($element) {
     $element['#attributes']['type'] = 'url';
-    Element::setAttributes($element, array('id', 'name', 'value', 'size', 'maxlength', 'placeholder'));
-    static::setAttributes($element, array('form-url'));
+    Element::setAttributes($element, ['id', 'name', 'value', 'size', 'maxlength', 'placeholder']);
+    static::setAttributes($element, ['form-url']);
 
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Value.php b/core/lib/Drupal/Core/Render/Element/Value.php
index 015b0bdb3557959db18860764d9a83c89ed83b36..023bb1af0e5f994db1f4224f75aa4ab893e943ed 100644
--- a/core/lib/Drupal/Core/Render/Element/Value.php
+++ b/core/lib/Drupal/Core/Render/Element/Value.php
@@ -25,9 +25,9 @@ class Value extends FormElement {
    * {@inheritdoc}
    */
   public function getInfo() {
-    return array(
+    return [
       '#input' => TRUE,
-    );
+    ];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Render/Element/VerticalTabs.php b/core/lib/Drupal/Core/Render/Element/VerticalTabs.php
index 1d108aaed743d7165497ed318e9d2f33b757fcd3..759723b4a6f4eb78324ec92a958d5a5558985607 100644
--- a/core/lib/Drupal/Core/Render/Element/VerticalTabs.php
+++ b/core/lib/Drupal/Core/Render/Element/VerticalTabs.php
@@ -54,16 +54,16 @@ class VerticalTabs extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#default_tab' => '',
-      '#process' => array(
-        array($class, 'processVerticalTabs'),
-      ),
-      '#pre_render' => array(
-        array($class, 'preRenderVerticalTabs'),
-      ),
-      '#theme_wrappers' => array('vertical_tabs', 'form_element'),
-    );
+      '#process' => [
+        [$class, 'processVerticalTabs'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderVerticalTabs'],
+      ],
+      '#theme_wrappers' => ['vertical_tabs', 'form_element'],
+    ];
   }
 
   /**
@@ -106,11 +106,11 @@ public static function processVerticalTabs(&$element, FormStateInterface $form_s
 
     // Inject a new details as child, so that form_process_details() processes
     // this details element like any other details.
-    $element['group'] = array(
+    $element['group'] = [
       '#type' => 'details',
-      '#theme_wrappers' => array(),
+      '#theme_wrappers' => [],
       '#parents' => $element['#parents'],
-    );
+    ];
 
     // Add an invisible label for accessibility.
     if (!isset($element['#title'])) {
@@ -128,11 +128,11 @@ public static function processVerticalTabs(&$element, FormStateInterface $form_s
     if ($form_state->hasValue($name . '__active_tab')) {
       $element['#default_tab'] = $form_state->getValue($name . '__active_tab');
     }
-    $element[$name . '__active_tab'] = array(
+    $element[$name . '__active_tab'] = [
       '#type' => 'hidden',
       '#default_value' => $element['#default_tab'],
-      '#attributes' => array('class' => array('vertical-tabs__active-tab')),
-    );
+      '#attributes' => ['class' => ['vertical-tabs__active-tab']],
+    ];
     // Clean up the active tab value so it's not accidentally stored in
     // settings forms.
     $form_state->addCleanValueKey($name . '__active_tab');
diff --git a/core/lib/Drupal/Core/Render/Element/Weight.php b/core/lib/Drupal/Core/Render/Element/Weight.php
index a6ecbee764eb05d0e187de5e89c47158083dfb08..468290a1a70599ab6c46278b6ff4cd8d3e74d6d3 100644
--- a/core/lib/Drupal/Core/Render/Element/Weight.php
+++ b/core/lib/Drupal/Core/Render/Element/Weight.php
@@ -33,15 +33,15 @@ class Weight extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#delta' => 10,
       '#default_value' => 0,
-      '#process' => array(
-        array($class, 'processWeight'),
-        array($class, 'processAjaxForm'),
-      ),
-    );
+      '#process' => [
+        [$class, 'processWeight'],
+        [$class, 'processAjaxForm'],
+      ],
+    ];
   }
 
   /**
@@ -55,7 +55,7 @@ public static function processWeight(&$element, FormStateInterface $form_state,
     $max_elements = \Drupal::config('system.site')->get('weight_select_max');
     if ($element['#delta'] <= $max_elements) {
       $element['#type'] = 'select';
-      $weights = array();
+      $weights = [];
       for ($n = (-1 * $element['#delta']); $n <= $element['#delta']; $n++) {
         $weights[$n] = $n;
       }
diff --git a/core/lib/Drupal/Core/Render/ElementInfoManager.php b/core/lib/Drupal/Core/Render/ElementInfoManager.php
index 175452489444424813cc5dc8ed8e0e71bd745f7f..015e3900bd3ec97dddddcee690dfc6d3e66ec63e 100644
--- a/core/lib/Drupal/Core/Render/ElementInfoManager.php
+++ b/core/lib/Drupal/Core/Render/ElementInfoManager.php
@@ -75,7 +75,7 @@ public function getInfo($type) {
     if (!isset($this->elementInfo[$theme_name])) {
       $this->elementInfo[$theme_name] = $this->buildInfo($theme_name);
     }
-    $info = isset($this->elementInfo[$theme_name][$type]) ? $this->elementInfo[$theme_name][$type] : array();
+    $info = isset($this->elementInfo[$theme_name][$type]) ? $this->elementInfo[$theme_name][$type] : [];
     $info['#defaults_loaded'] = TRUE;
     return $info;
   }
@@ -114,7 +114,7 @@ protected function buildInfo($theme_name) {
       // will receive input, and assign the value callback.
       if ($element instanceof FormElementInterface) {
         $element_info['#input'] = TRUE;
-        $element_info['#value_callback'] = array($definition['class'], 'valueCallback');
+        $element_info['#value_callback'] = [$definition['class'], 'valueCallback'];
       }
       $info[$element_type] = $element_info;
     }
@@ -136,7 +136,7 @@ protected function buildInfo($theme_name) {
    *
    * @return \Drupal\Core\Render\Element\ElementInterface
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     return parent::createInstance($plugin_id, $configuration);
   }
 
diff --git a/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php b/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php
index 358b1f1b725efd7bfd4b373ee57e6eb3d9752827..7b171f8202fe85d32a6e36f49b70c243d7124481 100644
--- a/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php
+++ b/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php
@@ -410,10 +410,10 @@ protected function processHtmlHeadLink(array $html_head_link) {
       $attributes = $item[0];
       $should_add_header = isset($item[1]) ? $item[1] : FALSE;
 
-      $element = array(
+      $element = [
         '#tag' => 'link',
         '#attributes' => $attributes,
-      );
+      ];
       $href = $attributes['href'];
       $attached['html_head'][] = [$element, 'html_head_link:' . $attributes['rel'] . ':' . $href];
 
diff --git a/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php b/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php
index 0a1b993987ade069aaa6b9b8bef97926e1d093f6..2b2a2a59ba9c32eb44a948fefcfd24232df2ff0a 100644
--- a/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php
+++ b/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php
@@ -66,7 +66,7 @@ public function renderResponse(array $main_content, Request $request, RouteMatch
     // replace the element making the Ajax call. The default 'replaceWith'
     // behavior can be changed with #ajax['method'].
     $response->addCommand(new InsertCommand(NULL, $html));
-    $status_messages = array('#type' => 'status_messages');
+    $status_messages = ['#type' => 'status_messages'];
     $output = $this->drupalRenderRoot($status_messages);
     if (!empty($output)) {
       $response->addCommand(new PrependCommand(NULL, $output));
diff --git a/core/lib/Drupal/Core/Render/MainContent/DialogRenderer.php b/core/lib/Drupal/Core/Render/MainContent/DialogRenderer.php
index c71604b51163bf6d8a48ef825d6d1942cb81ef3b..664063a5fe88e0fae0e3f461e1ac56c8a641264e 100644
--- a/core/lib/Drupal/Core/Render/MainContent/DialogRenderer.php
+++ b/core/lib/Drupal/Core/Render/MainContent/DialogRenderer.php
@@ -50,7 +50,7 @@ public function renderResponse(array $main_content, Request $request, RouteMatch
     $title = isset($main_content['#title']) ? $main_content['#title'] : $this->titleResolver->getTitle($request, $route_match->getRouteObject());
 
     // Determine the dialog options and the target for the OpenDialogCommand.
-    $options = $request->request->get('dialogOptions', array());
+    $options = $request->request->get('dialogOptions', []);
     $target = $this->determineTargetSelector($options, $route_match);
 
     $response->addCommand(new OpenDialogCommand($target, $title, $content, $options));
diff --git a/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php b/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
index 54c40f63ca31c7d095d84bd229ceaa5cdfad639c..c76a9728d2818b9411892d610f06bbcb6ec1ff40 100644
--- a/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
+++ b/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
@@ -253,9 +253,9 @@ protected function prepare(array $main_content, Request $request, RouteMatchInte
 
       // Generate a #type => page render array using the page display variant,
       // the page display will build the content for the various page regions.
-      $page = array(
+      $page = [
         '#type' => 'page',
-      );
+      ];
       $page += $page_display->build();
     }
 
diff --git a/core/lib/Drupal/Core/Render/MainContent/ModalRenderer.php b/core/lib/Drupal/Core/Render/MainContent/ModalRenderer.php
index fcb38e253adfe3eec72e9462ce12d8b105fc336d..60a495122ddb7abac9222a51e1c7625e1fee0a73 100644
--- a/core/lib/Drupal/Core/Render/MainContent/ModalRenderer.php
+++ b/core/lib/Drupal/Core/Render/MainContent/ModalRenderer.php
@@ -31,7 +31,7 @@ public function renderResponse(array $main_content, Request $request, RouteMatch
 
     // Determine the title: use the title provided by the main content if any,
     // otherwise get it from the routing information.
-    $options = $request->request->get('dialogOptions', array());
+    $options = $request->request->get('dialogOptions', []);
 
     $response->addCommand(new OpenModalDialogCommand($title, $content, $options));
     return $response;
diff --git a/core/lib/Drupal/Core/Render/MetadataBubblingUrlGenerator.php b/core/lib/Drupal/Core/Render/MetadataBubblingUrlGenerator.php
index de52da2f6cbcb0272c38cc62074bb6946d6c54a2..6a5527bdebd3c86680bda9844433a132a6d2d957 100644
--- a/core/lib/Drupal/Core/Render/MetadataBubblingUrlGenerator.php
+++ b/core/lib/Drupal/Core/Render/MetadataBubblingUrlGenerator.php
@@ -64,7 +64,7 @@ public function getContext() {
   /**
    * {@inheritdoc}
    */
-  public function getPathFromRoute($name, $parameters = array()) {
+  public function getPathFromRoute($name, $parameters = []) {
     return $this->urlGenerator->getPathFromRoute($name, $parameters);
   }
 
@@ -91,7 +91,7 @@ protected function bubble(GeneratedUrl $generated_url, array $options = []) {
   /**
    * {@inheritdoc}
    */
-  public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH) {
+  public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH) {
     $options['absolute'] = is_bool($referenceType) ? $referenceType : $referenceType === self::ABSOLUTE_URL;
     $generated_url = $this->generateFromRoute($name, $parameters, $options, TRUE);
     $this->bubble($generated_url);
@@ -101,7 +101,7 @@ public function generate($name, $parameters = array(), $referenceType = self::AB
   /**
    * {@inheritdoc}
    */
-  public function generateFromRoute($name, $parameters = array(), $options = array(), $collect_bubbleable_metadata = FALSE) {
+  public function generateFromRoute($name, $parameters = [], $options = [], $collect_bubbleable_metadata = FALSE) {
     $generated_url = $this->urlGenerator->generateFromRoute($name, $parameters, $options, TRUE);
     if (!$collect_bubbleable_metadata) {
       $this->bubble($generated_url, $options);
@@ -119,7 +119,7 @@ public function supports($name) {
   /**
    * {@inheritdoc}
    */
-  public function getRouteDebugMessage($name, array $parameters = array()) {
+  public function getRouteDebugMessage($name, array $parameters = []) {
     return $this->urlGenerator->getRouteDebugMessage($name, $parameters);
   }
 
diff --git a/core/lib/Drupal/Core/Render/Renderer.php b/core/lib/Drupal/Core/Render/Renderer.php
index 503359ef784e40ece8b9cf35e22d3b073e2be8f1..257349f973c2ed2e22a89d7788a790e244afd299 100644
--- a/core/lib/Drupal/Core/Render/Renderer.php
+++ b/core/lib/Drupal/Core/Render/Renderer.php
@@ -383,9 +383,9 @@ protected function doRender(&$elements, $is_root_call = FALSE) {
     }
 
     // Defaults for bubbleable rendering metadata.
-    $elements['#cache']['tags'] = isset($elements['#cache']['tags']) ? $elements['#cache']['tags'] : array();
+    $elements['#cache']['tags'] = isset($elements['#cache']['tags']) ? $elements['#cache']['tags'] : [];
     $elements['#cache']['max-age'] = isset($elements['#cache']['max-age']) ? $elements['#cache']['max-age'] : Cache::PERMANENT;
-    $elements['#attached'] = isset($elements['#attached']) ? $elements['#attached'] : array();
+    $elements['#attached'] = isset($elements['#attached']) ? $elements['#attached'] : [];
 
     // Allow #pre_render to abort rendering.
     if (!empty($elements['#printed'])) {
@@ -415,11 +415,11 @@ protected function doRender(&$elements, $is_root_call = FALSE) {
     $theme_is_implemented = isset($elements['#theme']);
     // Check the elements for insecure HTML and pass through sanitization.
     if (isset($elements)) {
-      $markup_keys = array(
+      $markup_keys = [
         '#description',
         '#field_prefix',
         '#field_suffix',
-      );
+      ];
       foreach ($markup_keys as $key) {
         if (!empty($elements[$key]) && is_scalar($elements[$key])) {
           $elements[$key] = $this->xssFilterAdminIfUnsafe($elements[$key]);
diff --git a/core/lib/Drupal/Core/Render/theme.api.php b/core/lib/Drupal/Core/Render/theme.api.php
index 2970b2744ea90be5e3b9f00cc6325450329bdce3..fec05d1d8f883472b0a7745fdd25882f7936f6d0 100644
--- a/core/lib/Drupal/Core/Render/theme.api.php
+++ b/core/lib/Drupal/Core/Render/theme.api.php
@@ -528,12 +528,12 @@
  */
 function hook_form_system_theme_settings_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state) {
   // Add a checkbox to toggle the breadcrumb trail.
-  $form['toggle_breadcrumb'] = array(
+  $form['toggle_breadcrumb'] = [
     '#type' => 'checkbox',
     '#title' => t('Display the breadcrumb'),
     '#default_value' => theme_get_setting('features.breadcrumb'),
     '#description'   => t('Show a trail of links from the homepage to the current page.'),
-  );
+  ];
 }
 
 /**
@@ -603,7 +603,7 @@ function hook_preprocess(&$variables, $hook) {
 function hook_preprocess_HOOK(&$variables) {
   // This example is from rdf_preprocess_image(). It adds an RDF attribute
   // to the image hook's variables.
-  $variables['attributes']['typeof'] = array('foaf:Image');
+  $variables['attributes']['typeof'] = ['foaf:Image'];
 }
 
 /**
@@ -630,7 +630,7 @@ function hook_preprocess_HOOK(&$variables) {
  * @see hook_theme_suggestions_HOOK_alter()
  */
 function hook_theme_suggestions_HOOK(array $variables) {
-  $suggestions = array();
+  $suggestions = [];
 
   $suggestions[] = 'node__' . $variables['elements']['#langcode'];
 
@@ -962,10 +962,10 @@ function hook_library_info_alter(&$libraries, $extension) {
       // relative to the original extension, specify an absolute path (relative
       // to DRUPAL_ROOT / base_path()) to the new location.
       $new_path = '/' . drupal_get_path('module', 'farbtastic_update') . '/js';
-      $new_js = array();
-      $replacements = array(
+      $new_js = [];
+      $replacements = [
         $old_path . '/farbtastic.js' => $new_path . '/farbtastic-2.0.js',
-      );
+      ];
       foreach ($libraries['jquery.farbtastic']['js'] as $source => $options) {
         if (isset($replacements[$source])) {
           $new_js[$replacements[$source]] = $options;
@@ -1178,21 +1178,21 @@ function hook_page_bottom(array &$page_bottom) {
  * @see hook_theme_registry_alter()
  */
 function hook_theme($existing, $type, $theme, $path) {
-  return array(
-    'forum_display' => array(
-      'variables' => array('forums' => NULL, 'topics' => NULL, 'parents' => NULL, 'tid' => NULL, 'sortby' => NULL, 'forum_per_page' => NULL),
-    ),
-    'forum_list' => array(
-      'variables' => array('forums' => NULL, 'parents' => NULL, 'tid' => NULL),
-    ),
-    'forum_icon' => array(
-      'variables' => array('new_posts' => NULL, 'num_posts' => 0, 'comment_mode' => 0, 'sticky' => 0),
-    ),
-    'status_report' => array(
+  return [
+    'forum_display' => [
+      'variables' => ['forums' => NULL, 'topics' => NULL, 'parents' => NULL, 'tid' => NULL, 'sortby' => NULL, 'forum_per_page' => NULL],
+    ],
+    'forum_list' => [
+      'variables' => ['forums' => NULL, 'parents' => NULL, 'tid' => NULL],
+    ],
+    'forum_icon' => [
+      'variables' => ['new_posts' => NULL, 'num_posts' => 0, 'comment_mode' => 0, 'sticky' => 0],
+    ],
+    'status_report' => [
       'render element' => 'requirements',
       'file' => 'system.admin.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
diff --git a/core/lib/Drupal/Core/RouteProcessor/RouteProcessorManager.php b/core/lib/Drupal/Core/RouteProcessor/RouteProcessorManager.php
index 4e710ba9eb3eaa3f802cb2ed6c5bc4062eec18f2..74a791dfbdb7a4fe515102dd448c3eba828e92aa 100644
--- a/core/lib/Drupal/Core/RouteProcessor/RouteProcessorManager.php
+++ b/core/lib/Drupal/Core/RouteProcessor/RouteProcessorManager.php
@@ -20,7 +20,7 @@ class RouteProcessorManager implements OutboundRouteProcessorInterface {
    *   An array whose keys are priorities and whose values are arrays of path
    *   processor objects.
    */
-  protected $outboundProcessors = array();
+  protected $outboundProcessors = [];
 
   /**
    * Holds the array of outbound processors, sorted by priority.
@@ -28,7 +28,7 @@ class RouteProcessorManager implements OutboundRouteProcessorInterface {
    * @var array
    *   An array of path processor objects.
    */
-  protected $sortedOutbound = array();
+  protected $sortedOutbound = [];
 
   /**
    * Adds an outbound processor object to the $outboundProcessors property.
@@ -40,7 +40,7 @@ class RouteProcessorManager implements OutboundRouteProcessorInterface {
    */
   public function addOutbound(OutboundRouteProcessorInterface $processor, $priority = 0) {
     $this->outboundProcessors[$priority][] = $processor;
-    $this->sortedOutbound = array();
+    $this->sortedOutbound = [];
   }
 
   /**
@@ -71,7 +71,7 @@ protected function getOutbound() {
    * Sorts the processors according to priority.
    */
   protected function sortProcessors() {
-    $sorted = array();
+    $sorted = [];
     krsort($this->outboundProcessors);
 
     foreach ($this->outboundProcessors as $processors) {
diff --git a/core/lib/Drupal/Core/Routing/AccessAwareRouter.php b/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
index 5c3d93182ebf8fad089888c08b63437d2e649e9a..d8487c6ef92feb7714f0651f81a39d857b31b5a1 100644
--- a/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
+++ b/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
@@ -127,7 +127,7 @@ public function getRouteCollection() {
   /**
    * {@inheritdoc}
    */
-  public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH) {
+  public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH) {
     if ($this->router instanceof UrlGeneratorInterface) {
       return $this->router->generate($name, $parameters, $referenceType);
     }
diff --git a/core/lib/Drupal/Core/Routing/CompiledRoute.php b/core/lib/Drupal/Core/Routing/CompiledRoute.php
index 76d6ef16ebafca0c9efdf4d8c13925f180448c89..a1366a608492819121c57a64872778a196f139d9 100644
--- a/core/lib/Drupal/Core/Routing/CompiledRoute.php
+++ b/core/lib/Drupal/Core/Routing/CompiledRoute.php
@@ -62,7 +62,7 @@ class CompiledRoute extends SymfonyCompiledRoute {
    * @param array $variables
    *   An array of variables (variables defined in the path and in the host patterns)
    */
-  public function __construct($fit, $pattern_outline, $num_parts, $staticPrefix, $regex, array $tokens, array $pathVariables, $hostRegex = NULL, array $hostTokens = array(), array $hostVariables = array(), array $variables = array()) {
+  public function __construct($fit, $pattern_outline, $num_parts, $staticPrefix, $regex, array $tokens, array $pathVariables, $hostRegex = NULL, array $hostTokens = [], array $hostVariables = [], array $variables = []) {
     parent::__construct($staticPrefix, $regex, $tokens, $pathVariables, $hostRegex, $hostTokens, $hostVariables, $variables);
 
     $this->fit = $fit;
diff --git a/core/lib/Drupal/Core/Routing/Enhancer/ParamConversionEnhancer.php b/core/lib/Drupal/Core/Routing/Enhancer/ParamConversionEnhancer.php
index e804f2e66725829c8199f2e322a9148ef8cffce3..09d61481186c53a2ee7fe1797342eb929ba00003 100644
--- a/core/lib/Drupal/Core/Routing/Enhancer/ParamConversionEnhancer.php
+++ b/core/lib/Drupal/Core/Routing/Enhancer/ParamConversionEnhancer.php
@@ -62,7 +62,7 @@ protected function copyRawVariables(array $defaults) {
     // Foreach will copy the values from the array it iterates. Even if they
     // are references, use it to break them. This avoids any scenarios where raw
     // variables also get replaced with converted values.
-    $raw_variables = array();
+    $raw_variables = [];
     foreach (array_intersect_key($defaults, $variables) as $key => $value) {
       $raw_variables[$key] = $value;
     }
@@ -85,7 +85,7 @@ public function onException(GetResponseForExceptionEvent $event) {
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    $events[KernelEvents::EXCEPTION][] = array('onException', 75);
+    $events[KernelEvents::EXCEPTION][] = ['onException', 75];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Routing/MatcherDumper.php b/core/lib/Drupal/Core/Routing/MatcherDumper.php
index 82c7074f81d50c72dbe993e0bb5525f2e8d0bb10..5e329f7daf857cf851afeb80241a55f9b265f04b 100644
--- a/core/lib/Drupal/Core/Routing/MatcherDumper.php
+++ b/core/lib/Drupal/Core/Routing/MatcherDumper.php
@@ -84,10 +84,10 @@ public function addRoutes(RouteCollection $routes) {
    * @param array $options
    *   An array of options.
    */
-  public function dump(array $options = array()) {
+  public function dump(array $options = []) {
     // Convert all of the routes into database records.
     // Accumulate the menu masks on top of any we found before.
-    $masks = array_flip($this->state->get('routing.menu_masks.' . $this->tableName, array()));
+    $masks = array_flip($this->state->get('routing.menu_masks.' . $this->tableName, []));
     // Delete any old records first, then insert the new ones. That avoids
     // stale data. The transaction makes it atomic to avoid unstable router
     // states due to random failures.
@@ -106,15 +106,15 @@ public function dump(array $options = array()) {
       // Split the routes into chunks to avoid big INSERT queries.
       $route_chunks = array_chunk($this->routes->all(), 50, TRUE);
       foreach ($route_chunks as $routes) {
-        $insert = $this->connection->insert($this->tableName)->fields(array(
+        $insert = $this->connection->insert($this->tableName)->fields([
           'name',
           'fit',
           'path',
           'pattern_outline',
           'number_parts',
           'route',
-        ));
-        $names = array();
+        ]);
+        $names = [];
         foreach ($routes as $name => $route) {
           /** @var \Symfony\Component\Routing\Route $route */
           $route->setOption('compiler_class', '\Drupal\Core\Routing\RouteCompiler');
@@ -126,14 +126,14 @@ public function dump(array $options = array()) {
           // patterns we need to check in the RouteProvider.
           $masks[$compiled->getFit()] = 1;
           $names[] = $name;
-          $values = array(
+          $values = [
             'name' => $name,
             'fit' => $compiled->getFit(),
             'path' => $route->getPath(),
             'pattern_outline' => $compiled->getPatternOutline(),
             'number_parts' => $compiled->getNumParts(),
             'route' => serialize($route),
-          );
+          ];
           $insert->values($values);
         }
 
diff --git a/core/lib/Drupal/Core/Routing/NullGenerator.php b/core/lib/Drupal/Core/Routing/NullGenerator.php
index 9d6db83d0fa02a3ab72ece797796eaecf4a9f11d..74db5c969225c432c331c408151c3bee945c444e 100644
--- a/core/lib/Drupal/Core/Routing/NullGenerator.php
+++ b/core/lib/Drupal/Core/Routing/NullGenerator.php
@@ -52,7 +52,7 @@ protected function processRoute($name, Route $route, array &$parameters, Bubblea
   /**
    * {@inheritdoc}
    */
-  protected function getInternalPathFromRoute($name, Route $route, $parameters = array(), &$query_params = array()) {
+  protected function getInternalPathFromRoute($name, Route $route, $parameters = [], &$query_params = []) {
     return $route->getPath();
   }
 
@@ -71,7 +71,7 @@ public function getContext() {
   /**
    * {@inheritdoc}
    */
-  protected function processPath($path, &$options = array(), BubbleableMetadata $bubbleable_metadata = NULL) {
+  protected function processPath($path, &$options = [], BubbleableMetadata $bubbleable_metadata = NULL) {
     return $path;
   }
 
diff --git a/core/lib/Drupal/Core/Routing/NullMatcherDumper.php b/core/lib/Drupal/Core/Routing/NullMatcherDumper.php
index 938a426c438d49379e7ec2599a210e1fb2c48a57..3378e1bbfc15908a09ddebcd446df30e9676b2fb 100644
--- a/core/lib/Drupal/Core/Routing/NullMatcherDumper.php
+++ b/core/lib/Drupal/Core/Routing/NullMatcherDumper.php
@@ -39,7 +39,7 @@ public function addRoutes(RouteCollection $routes) {
    * @param array $options
    *   An array of options.
    */
-  public function dump(array $options = array()) {
+  public function dump(array $options = []) {
     // The dumper is reused for multiple providers, so reset the queued routes.
     $this->routes = NULL;
   }
diff --git a/core/lib/Drupal/Core/Routing/RouteBuilder.php b/core/lib/Drupal/Core/Routing/RouteBuilder.php
index 29da760604dd83853b00a779b6ac89285ab97df9..2a0720a2d46433c0503651ebe5eb3be9693e01f3 100644
--- a/core/lib/Drupal/Core/Routing/RouteBuilder.php
+++ b/core/lib/Drupal/Core/Routing/RouteBuilder.php
@@ -159,15 +159,15 @@ public function rebuild() {
         unset($routes['route_callbacks']);
       }
       foreach ($routes as $name => $route_info) {
-        $route_info += array(
-          'defaults' => array(),
-          'requirements' => array(),
-          'options' => array(),
+        $route_info += [
+          'defaults' => [],
+          'requirements' => [],
+          'options' => [],
           'host' => NULL,
-          'schemes' => array(),
-          'methods' => array(),
+          'schemes' => [],
+          'methods' => [],
           'condition' => '',
-        );
+        ];
 
         $route = new Route($route_info['path'], $route_info['defaults'], $route_info['requirements'], $route_info['options'], $route_info['host'], $route_info['schemes'], $route_info['methods'], $route_info['condition']);
         $collection->add($name, $route);
diff --git a/core/lib/Drupal/Core/Routing/RouteMatch.php b/core/lib/Drupal/Core/Routing/RouteMatch.php
index 29ff5c6c4c038e3496a55a71416044feca80a8d8..5784b7f7c8a607ddbd56fc7ff6adbf8f1c8359d3 100644
--- a/core/lib/Drupal/Core/Routing/RouteMatch.php
+++ b/core/lib/Drupal/Core/Routing/RouteMatch.php
@@ -52,7 +52,7 @@ class RouteMatch implements RouteMatchInterface {
    * @param array $raw_parameters
    *   The raw $parameters array.
    */
-  public function __construct($route_name, Route $route, array $parameters = array(), array $raw_parameters = array()) {
+  public function __construct($route_name, Route $route, array $parameters = [], array $raw_parameters = []) {
     $this->routeName = $route_name;
     $this->route = $route;
 
@@ -77,7 +77,7 @@ public function __construct($route_name, Route $route, array $parameters = array
    */
   public static function createFromRequest(Request $request) {
     if ($request->attributes->get(RouteObjectInterface::ROUTE_OBJECT)) {
-      $raw_variables = array();
+      $raw_variables = [];
       if ($raw = $request->attributes->get('_raw_variables')) {
         $raw_variables = $raw->all();
       }
@@ -141,7 +141,7 @@ public function getRawParameters() {
    *   Route parameter names as both the keys and values.
    */
   protected function getParameterNames() {
-    $names = array();
+    $names = [];
     if ($route = $this->getRouteObject()) {
       // Variables defined in path and host patterns are route parameters.
       $variables = $route->compile()->getVariables();
diff --git a/core/lib/Drupal/Core/Routing/RoutePreloader.php b/core/lib/Drupal/Core/Routing/RoutePreloader.php
index 2d382bb749611a670538994d8a4097daec42e081..9e75cdf1f546ed9ac9e98545ce93f0cb487dd66b 100644
--- a/core/lib/Drupal/Core/Routing/RoutePreloader.php
+++ b/core/lib/Drupal/Core/Routing/RoutePreloader.php
@@ -38,7 +38,7 @@ class RoutePreloader implements EventSubscriberInterface {
    *
    * @var array
    */
-  protected $nonAdminRoutesOnRebuild = array();
+  protected $nonAdminRoutesOnRebuild = [];
 
   /**
    * The cache backend used to skip the state loading.
@@ -114,7 +114,7 @@ public function onAlterRoutes(RouteBuildEvent $event) {
    */
   public function onFinishedRoutes(Event $event) {
     $this->state->set('routing.non_admin_routes', $this->nonAdminRoutesOnRebuild);
-    $this->nonAdminRoutesOnRebuild = array();
+    $this->nonAdminRoutesOnRebuild = [];
   }
 
   /**
@@ -122,11 +122,11 @@ public function onFinishedRoutes(Event $event) {
    */
   public static function getSubscribedEvents() {
     // Set a really low priority to catch as many as possible routes.
-    $events[RoutingEvents::ALTER] = array('onAlterRoutes', -1024);
-    $events[RoutingEvents::FINISHED] = array('onFinishedRoutes');
+    $events[RoutingEvents::ALTER] = ['onAlterRoutes', -1024];
+    $events[RoutingEvents::FINISHED] = ['onFinishedRoutes'];
     // Load the routes before the controller is executed (which happens after
     // the kernel request event).
-    $events[KernelEvents::REQUEST][] = array('onRequest');
+    $events[KernelEvents::REQUEST][] = ['onRequest'];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Routing/RouteProvider.php b/core/lib/Drupal/Core/Routing/RouteProvider.php
index f16aa9f0a502351eb747530f178b2f4d643a8914..1ba5f0d96c8ac6b3206b2ba4f3435b3f4a69370d 100644
--- a/core/lib/Drupal/Core/Routing/RouteProvider.php
+++ b/core/lib/Drupal/Core/Routing/RouteProvider.php
@@ -48,7 +48,7 @@ class RouteProvider implements PreloadableRouteProviderInterface, PagedRouteProv
    *
    * @var \Symfony\Component\Routing\Route[]
    */
-  protected $routes = array();
+  protected $routes = [];
 
   /**
    * A cache of already-loaded serialized routes, keyed by route name.
@@ -185,7 +185,7 @@ public function getRouteCollectionForRequest(Request $request) {
    *   Thrown if there is no route with that name in this repository.
    */
   public function getRouteByName($name) {
-    $routes = $this->getRoutesByNames(array($name));
+    $routes = $this->getRoutesByNames([$name]);
     if (empty($routes)) {
       throw new RouteNotFoundException(sprintf('Route "%s" does not exist.', $name));
     }
@@ -210,7 +210,7 @@ public function preLoadRoutes($names) {
       }
       else {
         try {
-          $result = $this->connection->query('SELECT name, route FROM {' . $this->connection->escapeTable($this->tableName) . '} WHERE name IN ( :names[] )', array(':names[]' => $routes_to_load));
+          $result = $this->connection->query('SELECT name, route FROM {' . $this->connection->escapeTable($this->tableName) . '} WHERE name IN ( :names[] )', [':names[]' => $routes_to_load]);
           $routes = $result->fetchAllKeyed();
 
           $this->cache->set($cid, $routes, Cache::PERMANENT, ['routes']);
@@ -252,14 +252,14 @@ public function getRoutesByNames($names) {
    */
   protected function getCandidateOutlines(array $parts) {
     $number_parts = count($parts);
-    $ancestors = array();
+    $ancestors = [];
     $length = $number_parts - 1;
     $end = (1 << $number_parts) - 1;
 
     // The highest possible mask is a 1 bit for every part of the path. We will
     // check every value down from there to generate a possible outline.
     if ($number_parts == 1) {
-      $masks = array(1);
+      $masks = [1];
     }
     elseif ($number_parts <= 3 && $number_parts > 0) {
       // Optimization - don't query the state system for short paths. This also
@@ -269,11 +269,11 @@ protected function getCandidateOutlines(array $parts) {
     }
     elseif ($number_parts <= 0) {
       // No path can match, short-circuit the process.
-      $masks = array();
+      $masks = [];
     }
     else {
       // Get the actual patterns that exist out of state.
-      $masks = (array) $this->state->get('routing.menu_masks.' . $this->tableName, array());
+      $masks = (array) $this->state->get('routing.menu_masks.' . $this->tableName, []);
     }
 
     // Only examine patterns that actually exist as router items (the masks).
@@ -346,9 +346,9 @@ protected function getRoutesByPath($path) {
     // trailing wildcard parts as long as the pattern matches, since we
     // dump the route pattern without those optional parts.
     try {
-      $routes = $this->connection->query("SELECT name, route, fit FROM {" . $this->connection->escapeTable($this->tableName) . "} WHERE pattern_outline IN ( :patterns[] ) AND number_parts >= :count_parts", array(
+      $routes = $this->connection->query("SELECT name, route, fit FROM {" . $this->connection->escapeTable($this->tableName) . "} WHERE pattern_outline IN ( :patterns[] ) AND number_parts >= :count_parts", [
         ':patterns[]' => $ancestors, ':count_parts' => count($parts),
-      ))
+      ])
         ->fetchAll(\PDO::FETCH_ASSOC);
     }
     catch (\Exception $e) {
@@ -357,7 +357,7 @@ protected function getRoutesByPath($path) {
 
     // We sort by fit and name in PHP to avoid a SQL filesort and avoid any
     // difference in the sorting behavior of SQL back-ends.
-    usort($routes, array($this, 'routeProviderRouteCompare'));
+    usort($routes, [$this, 'routeProviderRouteCompare']);
 
     foreach ($routes as $row) {
       $collection->add($row['name'], unserialize($row['route']));
@@ -389,8 +389,8 @@ public function getAllRoutes() {
    * {@inheritdoc}
    */
   public function reset() {
-    $this->routes  = array();
-    $this->serializedRoutes = array();
+    $this->routes  = [];
+    $this->serializedRoutes = [];
     $this->cacheTagInvalidator->invalidateTags(['routes']);
   }
 
@@ -398,7 +398,7 @@ public function reset() {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[RoutingEvents::FINISHED][] = array('reset');
+    $events[RoutingEvents::FINISHED][] = ['reset'];
     return $events;
   }
 
diff --git a/core/lib/Drupal/Core/Routing/Router.php b/core/lib/Drupal/Core/Routing/Router.php
index dc724bc2db8dd81f38e19afabc13dc6f83710305..e949c5efb862a166d555b046d0cedb75fa346ef6 100644
--- a/core/lib/Drupal/Core/Routing/Router.php
+++ b/core/lib/Drupal/Core/Routing/Router.php
@@ -214,7 +214,7 @@ protected function doMatchCollection($pathinfo, RouteCollection $routes, $case_s
         continue;
       }
 
-      $hostMatches = array();
+      $hostMatches = [];
       if ($compiledRoute->getHostRegex() && !preg_match($compiledRoute->getHostRegex(), $this->context->getHost(), $hostMatches)) {
         $routes->remove($name);
         continue;
@@ -383,7 +383,7 @@ public function getRouteCollection() {
   /**
    * {@inheritdoc}
    */
-  public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH) {
+  public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH) {
     @trigger_error('Use the \Drupal\Core\Url object instead', E_USER_DEPRECATED);
     return $this->urlGenerator->generate($name, $parameters, $referenceType);
   }
diff --git a/core/lib/Drupal/Core/Routing/TrustedRedirectResponse.php b/core/lib/Drupal/Core/Routing/TrustedRedirectResponse.php
index e959c2a290217c5b814235767cb1ee5be206df4b..625f7a341ab33fbce24b2cc07a2ed8b5434fc7bd 100644
--- a/core/lib/Drupal/Core/Routing/TrustedRedirectResponse.php
+++ b/core/lib/Drupal/Core/Routing/TrustedRedirectResponse.php
@@ -16,12 +16,12 @@ class TrustedRedirectResponse extends CacheableSecuredRedirectResponse {
    *
    * @var string[]
    */
-  protected $trustedUrls = array();
+  protected $trustedUrls = [];
 
   /**
    * {@inheritdoc}
    */
-  public function __construct($url, $status = 302, $headers = array()) {
+  public function __construct($url, $status = 302, $headers = []) {
     $this->trustedUrls[$url] = TRUE;
     parent::__construct($url, $status, $headers);
   }
diff --git a/core/lib/Drupal/Core/Routing/UrlGenerator.php b/core/lib/Drupal/Core/Routing/UrlGenerator.php
index 36ed0f6b6cb55c86b92e2b11e481d2f150a0e1b5..63dcd47b6ccdcd9975eb638d73d368f729eab8da 100644
--- a/core/lib/Drupal/Core/Routing/UrlGenerator.php
+++ b/core/lib/Drupal/Core/Routing/UrlGenerator.php
@@ -124,7 +124,7 @@ public function isStrictRequirements() {
   /**
    * {@inheritdoc}
    */
-  public function getPathFromRoute($name, $parameters = array()) {
+  public function getPathFromRoute($name, $parameters = []) {
     $route = $this->getRoute($name);
     $name = $this->getRouteDebugMessage($name);
     $this->processRoute($name, $route, $parameters);
@@ -241,7 +241,7 @@ protected function doGenerate(array $variables, array $defaults, array $tokens,
    *   The URL path corresponding to the route, without the base path, not URL
    *   encoded.
    */
-  protected function getInternalPathFromRoute($name, SymfonyRoute $route, $parameters = array(), &$query_params = array()) {
+  protected function getInternalPathFromRoute($name, SymfonyRoute $route, $parameters = [], &$query_params = []) {
     // The Route has a cache of its own and is not recompiled as long as it does
     // not get modified.
     $compiledRoute = $route->compile();
@@ -252,7 +252,7 @@ protected function getInternalPathFromRoute($name, SymfonyRoute $route, $paramet
   /**
    * {@inheritdoc}
    */
-  public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH) {
+  public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH) {
     $options['absolute'] = is_bool($referenceType) ? $referenceType : $referenceType === self::ABSOLUTE_URL;
     return $this->generateFromRoute($name, $parameters, $options);
   }
@@ -260,10 +260,10 @@ public function generate($name, $parameters = array(), $referenceType = self::AB
   /**
    * {@inheritdoc}
    */
-  public function generateFromRoute($name, $parameters = array(), $options = array(), $collect_bubbleable_metadata = FALSE) {
-    $options += array('prefix' => '');
+  public function generateFromRoute($name, $parameters = [], $options = [], $collect_bubbleable_metadata = FALSE) {
+    $options += ['prefix' => ''];
     if (!isset($options['query']) || !is_array($options['query'])) {
-      $options['query'] = array();
+      $options['query'] = [];
     }
 
     $route = $this->getRoute($name);
@@ -284,7 +284,7 @@ public function generateFromRoute($name, $parameters = array(), $options = array
     }
 
     $options += $route->getOption('default_url_options') ?: [];
-    $options += array('prefix' => '', 'path_processing' => TRUE);
+    $options += ['prefix' => '', 'path_processing' => TRUE];
 
     $name = $this->getRouteDebugMessage($name);
     $this->processRoute($name, $route, $parameters, $generated_url);
@@ -306,7 +306,7 @@ public function generateFromRoute($name, $parameters = array(), $options = array
       // so we need to encode them as they are not used for this purpose here
       // otherwise we would generate a URI that, when followed by a user agent
       // (e.g. browser), does not match this route
-      $path = strtr($path, array('/../' => '/%2E%2E/', '/./' => '/%2E/'));
+      $path = strtr($path, ['/../' => '/%2E%2E/', '/./' => '/%2E/']);
       if ('/..' === substr($path, -3)) {
         $path = substr($path, 0, -2) . '%2E%2E';
       }
@@ -377,7 +377,7 @@ public function generateFromRoute($name, $parameters = array(), $options = array
   /**
    * Passes the path to a processor manager to allow alterations.
    */
-  protected function processPath($path, &$options = array(), BubbleableMetadata $bubbleable_metadata = NULL) {
+  protected function processPath($path, &$options = [], BubbleableMetadata $bubbleable_metadata = NULL) {
     $actual_path = $path === '/' ? $path : rtrim($path, '/');
     return $this->pathProcessor->processOutbound($actual_path, $options, $this->requestStack->getCurrentRequest(), $bubbleable_metadata);
   }
@@ -433,7 +433,7 @@ public function supports($name) {
   /**
    * {@inheritdoc}
    */
-  public function getRouteDebugMessage($name, array $parameters = array()) {
+  public function getRouteDebugMessage($name, array $parameters = []) {
     if (is_scalar($name)) {
       return $name;
     }
diff --git a/core/lib/Drupal/Core/Routing/UrlGeneratorInterface.php b/core/lib/Drupal/Core/Routing/UrlGeneratorInterface.php
index b2b81968f5c15d9819188db4c2777c1cbb104d85..e63383df5f89c5b529d98a91c8510b3cdc34f3ae 100644
--- a/core/lib/Drupal/Core/Routing/UrlGeneratorInterface.php
+++ b/core/lib/Drupal/Core/Routing/UrlGeneratorInterface.php
@@ -24,7 +24,7 @@ interface UrlGeneratorInterface extends VersatileGeneratorInterface {
    *   The internal Drupal path corresponding to the route. This string is
    *   not urlencoded and will be an empty string for the front page.
    */
-  public function getPathFromRoute($name, $parameters = array());
+  public function getPathFromRoute($name, $parameters = []);
 
   /**
    * Generates a URL or path for a specific route based on the given parameters.
@@ -78,6 +78,6 @@ public function getPathFromRoute($name, $parameters = array());
    *   Should not be used in user code.
    *   Use \Drupal\Core\Url instead.
    */
-  public function generateFromRoute($name, $parameters = array(), $options = array(), $collect_bubbleable_metadata = FALSE);
+  public function generateFromRoute($name, $parameters = [], $options = [], $collect_bubbleable_metadata = FALSE);
 
 }
diff --git a/core/lib/Drupal/Core/Routing/UrlGeneratorTrait.php b/core/lib/Drupal/Core/Routing/UrlGeneratorTrait.php
index 98429d43ab9acf718cf01942c3c2390a8dfff391..7854a0ac96aa95c8079980f7e28c8ebd5de32ac9 100644
--- a/core/lib/Drupal/Core/Routing/UrlGeneratorTrait.php
+++ b/core/lib/Drupal/Core/Routing/UrlGeneratorTrait.php
@@ -38,7 +38,7 @@ trait UrlGeneratorTrait {
    *
    * @see \Drupal\Core\Routing\UrlGeneratorInterface::generateFromRoute()
    */
-  protected function url($route_name, $route_parameters = array(), $options = array()) {
+  protected function url($route_name, $route_parameters = [], $options = []) {
     return $this->getUrlGenerator()->generateFromRoute($route_name, $route_parameters, $options);
   }
 
diff --git a/core/lib/Drupal/Core/Session/AccountSwitcher.php b/core/lib/Drupal/Core/Session/AccountSwitcher.php
index cbebac4010da531e4c8ba367c7b3a41f45d05170..3c2b3d88c48791f6c36db534be1c56e45316d9cc 100644
--- a/core/lib/Drupal/Core/Session/AccountSwitcher.php
+++ b/core/lib/Drupal/Core/Session/AccountSwitcher.php
@@ -16,14 +16,14 @@ class AccountSwitcher implements AccountSwitcherInterface {
    *
    * @var \Drupal\Core\Session\AccountInterface[]
    */
-  protected $accountStack = array();
+  protected $accountStack = [];
 
   /**
    * The current user service.
    *
    * @var \Drupal\Core\Session\AccountProxyInterface
    */
-  protected $currentUser = array();
+  protected $currentUser = [];
 
   /**
    * The write-safe session handler.
diff --git a/core/lib/Drupal/Core/Session/SessionHandler.php b/core/lib/Drupal/Core/Session/SessionHandler.php
index 50bb22ffb75801c03e46a4c6e52657d417fc48e1..4078d41f6455579f99b2ecedc8d90d3f1b188ff9 100644
--- a/core/lib/Drupal/Core/Session/SessionHandler.php
+++ b/core/lib/Drupal/Core/Session/SessionHandler.php
@@ -72,14 +72,14 @@ public function write($sid, $value) {
     // manually.
     try {
       $request = $this->requestStack->getCurrentRequest();
-      $fields = array(
+      $fields = [
         'uid' => $request->getSession()->get('uid', 0),
         'hostname' => $request->getClientIP(),
         'session' => $value,
         'timestamp' => REQUEST_TIME,
-      );
+      ];
       $this->connection->merge('sessions')
-        ->keys(array('sid' => Crypt::hashBase64($sid)))
+        ->keys(['sid' => Crypt::hashBase64($sid)])
         ->fields($fields)
         ->execute();
       return TRUE;
diff --git a/core/lib/Drupal/Core/Session/SessionManager.php b/core/lib/Drupal/Core/Session/SessionManager.php
index 5f986021c1b211dd089c670e0eef58b5dbbe4f73..95495cfd033dffc9a418f50635cde3e25c6bad12 100644
--- a/core/lib/Drupal/Core/Session/SessionManager.php
+++ b/core/lib/Drupal/Core/Session/SessionManager.php
@@ -83,7 +83,7 @@ class SessionManager extends NativeSessionStorage implements SessionManagerInter
    *   @see \Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage::setSaveHandler()
    */
   public function __construct(RequestStack $request_stack, Connection $connection, MetadataBag $metadata_bag, SessionConfigurationInterface $session_configuration, $handler = NULL) {
-    $options = array();
+    $options = [];
     $this->sessionConfiguration = $session_configuration;
     $this->requestStack = $request_stack;
     $this->connection = $connection;
@@ -96,7 +96,7 @@ public function __construct(RequestStack $request_stack, Connection $connection,
     //   https://www.drupal.org/node/2229145, when we will be using the Symfony
     //   session object (which registers an attribute bag with the
     //   manager upon instantiation).
-    $this->bags = array();
+    $this->bags = [];
   }
 
   /**
@@ -130,7 +130,7 @@ public function start() {
       $this->setId(Crypt::randomBytesBase64());
 
       // Initialize the session global and attach the Symfony session bags.
-      $_SESSION = array();
+      $_SESSION = [];
       $this->loadSession();
 
       // NativeSessionStorage::loadSession() sets started to TRUE, reset it to
@@ -305,7 +305,7 @@ protected function isSessionObsolete() {
    */
   protected function getSessionDataMask() {
     if (empty($_SESSION)) {
-      return array();
+      return [];
     }
 
     // Start out with a completely filled mask.
@@ -330,7 +330,7 @@ protected function getSessionDataMask() {
    *   The old session ID. The new session ID is $this->getId().
    */
   protected function migrateStoredSession($old_session_id) {
-    $fields = array('sid' => Crypt::hashBase64($this->getId()));
+    $fields = ['sid' => Crypt::hashBase64($this->getId())];
     $this->connection->update('sessions')
       ->fields($fields)
       ->condition('sid', Crypt::hashBase64($old_session_id))
diff --git a/core/lib/Drupal/Core/Session/UserSession.php b/core/lib/Drupal/Core/Session/UserSession.php
index d4cdfe73f843f5aa7a9820b0b59b41f442a70372..f25247d213e1e35204c5124118f66a6e14c24f25 100644
--- a/core/lib/Drupal/Core/Session/UserSession.php
+++ b/core/lib/Drupal/Core/Session/UserSession.php
@@ -23,7 +23,7 @@ class UserSession implements AccountInterface {
    *
    * @var array
    */
-  protected $roles = array(AccountInterface::ANONYMOUS_ROLE);
+  protected $roles = [AccountInterface::ANONYMOUS_ROLE];
 
   /**
    * The Unix timestamp when the user last accessed the site.
@@ -73,7 +73,7 @@ class UserSession implements AccountInterface {
    * @param array $values
    *   Array of initial values for the user session.
    */
-  public function __construct(array $values = array()) {
+  public function __construct(array $values = []) {
     foreach ($values as $key => $value) {
       $this->$key = $value;
     }
@@ -93,7 +93,7 @@ public function getRoles($exclude_locked_roles = FALSE) {
     $roles = $this->roles;
 
     if ($exclude_locked_roles) {
-      $roles = array_values(array_diff($roles, array(AccountInterface::ANONYMOUS_ROLE, AccountInterface::AUTHENTICATED_ROLE)));
+      $roles = array_values(array_diff($roles, [AccountInterface::ANONYMOUS_ROLE, AccountInterface::AUTHENTICATED_ROLE]));
     }
 
     return $roles;
diff --git a/core/lib/Drupal/Core/Site/Settings.php b/core/lib/Drupal/Core/Site/Settings.php
index 2673fe8a9a0a69c22ffb322b5ae06c8cdab14c91..a1a6c38893ea8fe5c677263b1b51dfa79bd59e94 100644
--- a/core/lib/Drupal/Core/Site/Settings.php
+++ b/core/lib/Drupal/Core/Site/Settings.php
@@ -17,7 +17,7 @@ final class Settings {
    *
    * @var array
    */
-  private $storage = array();
+  private $storage = [];
 
   /**
    * Singleton instance.
@@ -114,9 +114,9 @@ public static function getAll() {
   public static function initialize($app_root, $site_path, &$class_loader) {
     // Export these settings.php variables to the global namespace.
     global $config_directories, $config;
-    $settings = array();
-    $config = array();
-    $databases = array();
+    $settings = [];
+    $config = [];
+    $databases = [];
 
     if (is_readable($app_root . '/' . $site_path . '/settings.php')) {
       require $app_root . '/' . $site_path . '/settings.php';
diff --git a/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php b/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php
index 5208a2d0daa19e97ea2c4fff7ad919d3f6b1ff1e..e3e4895efecf4b5f592d6d00d03d301f50ecd6b5 100644
--- a/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php
+++ b/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php
@@ -73,7 +73,7 @@ public static function setSettingsOnRequest(Request $request, Settings $settings
       $forwarded_header = $settings->get('reverse_proxy_forwarded_header', 'FORWARDED');
       $request::setTrustedHeaderName($request::HEADER_FORWARDED, $forwarded_header);
 
-      $proxies = $settings->get('reverse_proxy_addresses', array());
+      $proxies = $settings->get('reverse_proxy_addresses', []);
       if (count($proxies) > 0) {
         $request::setTrustedProxies($proxies);
       }
diff --git a/core/lib/Drupal/Core/State/State.php b/core/lib/Drupal/Core/State/State.php
index 8b3b106fd1484180a843a5c7710c5887a65308df..572e5cbf3393601ccabb0c2237eb11688d2e169b 100644
--- a/core/lib/Drupal/Core/State/State.php
+++ b/core/lib/Drupal/Core/State/State.php
@@ -56,7 +56,7 @@ protected function resolveCacheMiss($key) {
    * {@inheritdoc}
    */
   public function getMultiple(array $keys) {
-    $values = array();
+    $values = [];
     foreach ($keys as $key) {
       $values[$key] = $this->get($key);
     }
@@ -86,7 +86,7 @@ public function setMultiple(array $data) {
    */
   public function delete($key) {
     parent::delete($key);
-    $this->deleteMultiple(array($key));
+    $this->deleteMultiple([$key]);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/StreamWrapper/LocalReadOnlyStream.php b/core/lib/Drupal/Core/StreamWrapper/LocalReadOnlyStream.php
index 55d896aa49fb13b1e49aa0d0bcd8ab86b9e8fad4..edcf4b7549f31328b558af0ae1d0f92fba1643e7 100644
--- a/core/lib/Drupal/Core/StreamWrapper/LocalReadOnlyStream.php
+++ b/core/lib/Drupal/Core/StreamWrapper/LocalReadOnlyStream.php
@@ -26,7 +26,7 @@ public static function getType() {
    * {@inheritdoc}
    */
   public function stream_open($uri, $mode, $options, &$opened_path) {
-    if (!in_array($mode, array('r', 'rb', 'rt'))) {
+    if (!in_array($mode, ['r', 'rb', 'rt'])) {
       if ($options & STREAM_REPORT_ERRORS) {
         trigger_error('stream_open() write modes not supported for read-only stream wrappers', E_USER_WARNING);
       }
@@ -58,11 +58,11 @@ public function stream_open($uri, $mode, $options, &$opened_path) {
    */
   public function stream_lock($operation) {
     // Disallow exclusive lock or non-blocking lock requests
-    if (in_array($operation, array(LOCK_EX, LOCK_EX | LOCK_NB))) {
+    if (in_array($operation, [LOCK_EX, LOCK_EX | LOCK_NB])) {
       trigger_error('stream_lock() exclusive lock operations not supported for read-only stream wrappers', E_USER_WARNING);
       return FALSE;
     }
-    if (in_array($operation, array(LOCK_SH, LOCK_UN, LOCK_SH | LOCK_NB))) {
+    if (in_array($operation, [LOCK_SH, LOCK_UN, LOCK_SH | LOCK_NB])) {
       return flock($this->handle, $operation);
     }
 
diff --git a/core/lib/Drupal/Core/StreamWrapper/LocalStream.php b/core/lib/Drupal/Core/StreamWrapper/LocalStream.php
index 343b461eecc5264e6252cad91ba40cb953276dcc..a6c8d2e48d6bb39481db6561e3cea8361a94394c 100644
--- a/core/lib/Drupal/Core/StreamWrapper/LocalStream.php
+++ b/core/lib/Drupal/Core/StreamWrapper/LocalStream.php
@@ -189,7 +189,7 @@ public function stream_open($uri, $mode, $options, &$opened_path) {
    * @see http://php.net/manual/streamwrapper.stream-lock.php
    */
   public function stream_lock($operation) {
-    if (in_array($operation, array(LOCK_SH, LOCK_EX, LOCK_UN, LOCK_NB))) {
+    if (in_array($operation, [LOCK_SH, LOCK_EX, LOCK_UN, LOCK_NB])) {
       return flock($this->handle, $operation);
     }
 
diff --git a/core/lib/Drupal/Core/StreamWrapper/ReadOnlyStream.php b/core/lib/Drupal/Core/StreamWrapper/ReadOnlyStream.php
index 1b48910b4aaa36f8bbcaa8a621ce636766d1121d..e5538cc42f2564bc9955c3a6e3da09c7f3e12ebc 100644
--- a/core/lib/Drupal/Core/StreamWrapper/ReadOnlyStream.php
+++ b/core/lib/Drupal/Core/StreamWrapper/ReadOnlyStream.php
@@ -71,7 +71,7 @@ function getUri() {
    * @see http://php.net/manual/streamwrapper.stream-open.php
    */
   public function stream_open($uri, $mode, $options, &$opened_path) {
-    if (!in_array($mode, array('r', 'rb', 'rt'))) {
+    if (!in_array($mode, ['r', 'rb', 'rt'])) {
       if ($options & STREAM_REPORT_ERRORS) {
         trigger_error('stream_open() write modes not supported for read-only stream wrappers', E_USER_WARNING);
       }
@@ -111,11 +111,11 @@ public function stream_open($uri, $mode, $options, &$opened_path) {
    * @see http://php.net/manual/streamwrapper.stream-lock.php
    */
   public function stream_lock($operation) {
-    if (in_array($operation, array(LOCK_EX, LOCK_EX | LOCK_NB))) {
+    if (in_array($operation, [LOCK_EX, LOCK_EX | LOCK_NB])) {
       trigger_error('stream_lock() exclusive lock operations not supported for read-only stream wrappers', E_USER_WARNING);
       return FALSE;
     }
-    if (in_array($operation, array(LOCK_SH, LOCK_UN, LOCK_SH | LOCK_NB))) {
+    if (in_array($operation, [LOCK_SH, LOCK_UN, LOCK_SH | LOCK_NB])) {
       return flock($this->handle, $operation);
     }
 
diff --git a/core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php b/core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php
index 26b8eeecc9464e5a7e9f759fcceb9f6a685571e8..83310f68af2f341b62dd526ac3d1e357bfba4e0b 100644
--- a/core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php
+++ b/core/lib/Drupal/Core/StreamWrapper/StreamWrapperManager.php
@@ -23,7 +23,7 @@ class StreamWrapperManager implements ContainerAwareInterface, StreamWrapperMana
    *
    * @var array
    */
-  protected $info = array();
+  protected $info = [];
 
   /**
    * Contains collected stream wrappers.
@@ -41,7 +41,7 @@ class StreamWrapperManager implements ContainerAwareInterface, StreamWrapperMana
    *
    * @var array
    */
-  protected $wrappers = array();
+  protected $wrappers = [];
 
   /**
    * {@inheritdoc}
@@ -51,7 +51,7 @@ public function getWrappers($filter = StreamWrapperInterface::ALL) {
       return $this->wrappers[$filter];
     }
     elseif (isset($this->wrappers[StreamWrapperInterface::ALL])) {
-      $this->wrappers[$filter] = array();
+      $this->wrappers[$filter] = [];
       foreach ($this->wrappers[StreamWrapperInterface::ALL] as $scheme => $info) {
         // Bit-wise filter.
         if (($info['type'] & $filter) == $filter) {
@@ -61,7 +61,7 @@ public function getWrappers($filter = StreamWrapperInterface::ALL) {
       return $this->wrappers[$filter];
     }
     else {
-      return array();
+      return [];
     }
   }
 
@@ -69,7 +69,7 @@ public function getWrappers($filter = StreamWrapperInterface::ALL) {
    * {@inheritdoc}
    */
   public function getNames($filter = StreamWrapperInterface::ALL) {
-    $names = array();
+    $names = [];
     foreach (array_keys($this->getWrappers($filter)) as $scheme) {
       $names[$scheme] = $this->getViaScheme($scheme)->getName();
     }
@@ -81,7 +81,7 @@ public function getNames($filter = StreamWrapperInterface::ALL) {
    * {@inheritdoc}
    */
   public function getDescriptions($filter = StreamWrapperInterface::ALL) {
-    $descriptions = array();
+    $descriptions = [];
     foreach (array_keys($this->getWrappers($filter)) as $scheme) {
       $descriptions[$scheme] = $this->getViaScheme($scheme)->getDescription();
     }
@@ -149,11 +149,11 @@ protected function getWrapper($scheme, $uri) {
    *   The scheme for which the wrapper should be registered.
    */
   public function addStreamWrapper($service_id, $class, $scheme) {
-    $this->info[$scheme] = array(
+    $this->info[$scheme] = [
       'class' => $class,
       'type' => $class::getType(),
       'service_id' => $service_id,
-    );
+    ];
   }
 
   /**
@@ -200,7 +200,7 @@ public function registerWrapper($scheme, $class, $type) {
     }
 
     // Pre-populate the static cache with the filters most typically used.
-    $info = array('type' => $type, 'class' => $class);
+    $info = ['type' => $type, 'class' => $class];
     $this->wrappers[StreamWrapperInterface::ALL][$scheme] = $info;
 
     if (($type & StreamWrapperInterface::WRITE_VISIBLE) == StreamWrapperInterface::WRITE_VISIBLE) {
diff --git a/core/lib/Drupal/Core/StringTranslation/PluralTranslatableMarkup.php b/core/lib/Drupal/Core/StringTranslation/PluralTranslatableMarkup.php
index 674145617fbf5fe30284f28a5133734653277ac7..4600c170aaf57d8a701e1439c12c3efa0cbf3cbd 100644
--- a/core/lib/Drupal/Core/StringTranslation/PluralTranslatableMarkup.php
+++ b/core/lib/Drupal/Core/StringTranslation/PluralTranslatableMarkup.php
@@ -62,7 +62,7 @@ class PluralTranslatableMarkup extends TranslatableMarkup {
    */
   public function __construct($count, $singular, $plural, array $args = [], array $options = [], TranslationInterface $string_translation = NULL) {
     $this->count = $count;
-    $translatable_string = implode(static::DELIMITER, array($singular, $plural));
+    $translatable_string = implode(static::DELIMITER, [$singular, $plural]);
     parent::__construct($translatable_string, $args, $options, $string_translation);
   }
 
@@ -161,7 +161,7 @@ protected function getPluralIndex() {
    * {@inheritdoc}
    */
   public function __sleep() {
-    return array_merge(parent::__sleep(), array('count'));
+    return array_merge(parent::__sleep(), ['count']);
   }
 
 }
diff --git a/core/lib/Drupal/Core/StringTranslation/StringTranslationTrait.php b/core/lib/Drupal/Core/StringTranslation/StringTranslationTrait.php
index 63ff01915b2df08c7c5204340994a884fc0658ab..c435f79500cbd940a88418dd26e6b26499f2b611 100644
--- a/core/lib/Drupal/Core/StringTranslation/StringTranslationTrait.php
+++ b/core/lib/Drupal/Core/StringTranslation/StringTranslationTrait.php
@@ -67,7 +67,7 @@ trait StringTranslationTrait {
    *
    * @ingroup sanitization
    */
-  protected function t($string, array $args = array(), array $options = array()) {
+  protected function t($string, array $args = [], array $options = []) {
     return new TranslatableMarkup($string, $args, $options, $this->getStringTranslation());
   }
 
@@ -76,7 +76,7 @@ protected function t($string, array $args = array(), array $options = array()) {
    *
    * @see \Drupal\Core\StringTranslation\TranslationInterface::formatPlural()
    */
-  protected function formatPlural($count, $singular, $plural, array $args = array(), array $options = array()) {
+  protected function formatPlural($count, $singular, $plural, array $args = [], array $options = []) {
     return new PluralTranslatableMarkup($count, $singular, $plural, $args, $options, $this->getStringTranslation());
   }
 
diff --git a/core/lib/Drupal/Core/StringTranslation/TranslatableMarkup.php b/core/lib/Drupal/Core/StringTranslation/TranslatableMarkup.php
index 8e3c13c64316beec6de5ca5456bdc4fec4411451..80162125850fc95314e7cab8444fccfee5e8b3ca 100644
--- a/core/lib/Drupal/Core/StringTranslation/TranslatableMarkup.php
+++ b/core/lib/Drupal/Core/StringTranslation/TranslatableMarkup.php
@@ -134,7 +134,7 @@ class TranslatableMarkup extends FormattableMarkup {
    *
    * @ingroup sanitization
    */
-  public function __construct($string, array $arguments = array(), array $options = array(), TranslationInterface $string_translation = NULL) {
+  public function __construct($string, array $arguments = [], array $options = [], TranslationInterface $string_translation = NULL) {
     if (!is_string($string)) {
       $message = $string instanceof TranslatableMarkup ? '$string ("' . $string->getUntranslatedString() . '") must be a string.' : '$string ("' . (string) $string . '") must be a string.';
       throw new \InvalidArgumentException($message);
@@ -210,7 +210,7 @@ public function render() {
    * Magic __sleep() method to avoid serializing the string translator.
    */
   public function __sleep() {
-    return array('string', 'arguments', 'options');
+    return ['string', 'arguments', 'options'];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/StringTranslation/TranslationInterface.php b/core/lib/Drupal/Core/StringTranslation/TranslationInterface.php
index 8244302e63e4965f1bc776328ad62b83b556b660..6a977b4a59e89a55a75a4ccad3bd672a4c08ba9f 100644
--- a/core/lib/Drupal/Core/StringTranslation/TranslationInterface.php
+++ b/core/lib/Drupal/Core/StringTranslation/TranslationInterface.php
@@ -45,7 +45,7 @@ interface TranslationInterface {
    *
    * @ingroup sanitization
    */
-  public function translate($string, array $args = array(), array $options = array());
+  public function translate($string, array $args = [], array $options = []);
 
   /**
    * Translates a TranslatableMarkup object to a string.
@@ -107,6 +107,6 @@ public function translateString(TranslatableMarkup $translated_string);
    * @see \Drupal\Component\Utility\SafeMarkup::format()
    * @see \Drupal\Core\StringTranslation\PluralTranslatableMarkup::createFromTranslatedString()
    */
-  public function formatPlural($count, $singular, $plural, array $args = array(), array $options = array());
+  public function formatPlural($count, $singular, $plural, array $args = [], array $options = []);
 
 }
diff --git a/core/lib/Drupal/Core/StringTranslation/TranslationManager.php b/core/lib/Drupal/Core/StringTranslation/TranslationManager.php
index ce961207a028a95e07bf6e2fb36da8877a4bce99..40bf8f4b31db17f53d918bccbd1a93e23fb7315c 100644
--- a/core/lib/Drupal/Core/StringTranslation/TranslationManager.php
+++ b/core/lib/Drupal/Core/StringTranslation/TranslationManager.php
@@ -21,7 +21,7 @@ class TranslationManager implements TranslationInterface, TranslatorInterface {
    * @see \Drupal\Core\StringTranslation\TranslationManager::addTranslator()
    * @see \Drupal\Core\StringTranslation\TranslationManager::sortTranslators()
    */
-  protected $translators = array();
+  protected $translators = [];
 
   /**
    * An array of translators, sorted by priority.
@@ -77,7 +77,7 @@ public function addTranslator(TranslatorInterface $translator, $priority = 0) {
    *   A sorted array of translator objects.
    */
   protected function sortTranslators() {
-    $sorted = array();
+    $sorted = [];
     krsort($this->translators);
 
     foreach ($this->translators as $translators) {
@@ -106,7 +106,7 @@ public function getStringTranslation($langcode, $string, $context) {
   /**
    * {@inheritdoc}
    */
-  public function translate($string, array $args = array(), array $options = array()) {
+  public function translate($string, array $args = [], array $options = []) {
     return new TranslatableMarkup($string, $args, $options, $this);
   }
 
@@ -131,7 +131,7 @@ public function translateString(TranslatableMarkup $translated_string) {
    * @return string
    *   The translated string.
    */
-  protected function doTranslate($string, array $options = array()) {
+  protected function doTranslate($string, array $options = []) {
     // If a NULL langcode has been provided, unset it.
     if (!isset($options['langcode']) && array_key_exists('langcode', $options)) {
       unset($options['langcode']);
@@ -149,7 +149,7 @@ protected function doTranslate($string, array $options = array()) {
   /**
    * {@inheritdoc}
    */
-  public function formatPlural($count, $singular, $plural, array $args = array(), array $options = array()) {
+  public function formatPlural($count, $singular, $plural, array $args = [], array $options = []) {
     return new PluralTranslatableMarkup($count, $singular, $plural, $args, $options, $this);
   }
 
diff --git a/core/lib/Drupal/Core/StringTranslation/Translator/CustomStrings.php b/core/lib/Drupal/Core/StringTranslation/Translator/CustomStrings.php
index 8e733d5488a0e7ca32fcf27d9ee77023a33cd0f1..286ab61b1d4449eda7f66ae5932e9e7557f49da1 100644
--- a/core/lib/Drupal/Core/StringTranslation/Translator/CustomStrings.php
+++ b/core/lib/Drupal/Core/StringTranslation/Translator/CustomStrings.php
@@ -37,7 +37,7 @@ public function __construct(Settings $settings) {
    * {@inheritdoc}
    */
   protected function getLanguage($langcode) {
-    return $this->settings->get('locale_custom_strings_' . $langcode, array());
+    return $this->settings->get('locale_custom_strings_' . $langcode, []);
   }
 
 }
diff --git a/core/lib/Drupal/Core/StringTranslation/Translator/FileTranslation.php b/core/lib/Drupal/Core/StringTranslation/Translator/FileTranslation.php
index abe5e9a7b5552dc60de58eae2fa0f0712a4f0f2a..deee5f4f055762ce3a614132136201d426613f2b 100644
--- a/core/lib/Drupal/Core/StringTranslation/Translator/FileTranslation.php
+++ b/core/lib/Drupal/Core/StringTranslation/Translator/FileTranslation.php
@@ -47,7 +47,7 @@ protected function getLanguage($langcode) {
       return $this->filesToArray($langcode, $files);
     }
     else {
-      return array();
+      return [];
     }
   }
 
@@ -70,7 +70,7 @@ protected function getLanguage($langcode) {
    * @see file_scan_directory()
    */
   public function findTranslationFiles($langcode = NULL) {
-    $files = file_scan_directory($this->directory, $this->getTranslationFilesPattern($langcode), array('recurse' => FALSE));
+    $files = file_scan_directory($this->directory, $this->getTranslationFilesPattern($langcode), ['recurse' => FALSE]);
     return $files;
   }
 
diff --git a/core/lib/Drupal/Core/StringTranslation/Translator/StaticTranslation.php b/core/lib/Drupal/Core/StringTranslation/Translator/StaticTranslation.php
index 375130fb3c1c7430ec9068f9284e495fdc9cb691..15ee5c5a28676179e6d302d0b557eef46cc760e4 100644
--- a/core/lib/Drupal/Core/StringTranslation/Translator/StaticTranslation.php
+++ b/core/lib/Drupal/Core/StringTranslation/Translator/StaticTranslation.php
@@ -23,7 +23,7 @@ class StaticTranslation implements TranslatorInterface {
    * @param array $translations
    *   Array of override strings indexed by language and context
    */
-  public function __construct($translations = array()) {
+  public function __construct($translations = []) {
     $this->translations = $translations;
   }
 
@@ -46,7 +46,7 @@ public function getStringTranslation($langcode, $string, $context) {
    * {@inheritdoc}
    */
   public function reset() {
-    $this->translations = array();
+    $this->translations = [];
   }
 
   /**
@@ -66,7 +66,7 @@ protected function getLanguage($langcode) {
     // constructor. This can be useful while testing, but it does not support
     // loading specific languages. All available languages should be passed
     // in the constructor array.
-    return array();
+    return [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Template/Attribute.php b/core/lib/Drupal/Core/Template/Attribute.php
index 945c5bc0d62c0076c2803319be82c725c3ff4434..5449cde3da30ab2329b9e4d0340c46a17883edef 100644
--- a/core/lib/Drupal/Core/Template/Attribute.php
+++ b/core/lib/Drupal/Core/Template/Attribute.php
@@ -69,7 +69,7 @@ class Attribute implements \ArrayAccess, \IteratorAggregate, MarkupInterface {
    *
    * @var \Drupal\Core\Template\AttributeValueBase[]
    */
-  protected $storage = array();
+  protected $storage = [];
 
   /**
    * Constructs a \Drupal\Core\Template\Attribute object.
@@ -77,7 +77,7 @@ class Attribute implements \ArrayAccess, \IteratorAggregate, MarkupInterface {
    * @param array $attributes
    *   An associative array of key-value pairs to be converted to attributes.
    */
-  public function __construct($attributes = array()) {
+  public function __construct($attributes = []) {
     foreach ($attributes as $name => $value) {
       $this->offsetSet($name, $value);
     }
@@ -170,7 +170,7 @@ public function offsetExists($name) {
   public function addClass() {
     $args = func_get_args();
     if ($args) {
-      $classes = array();
+      $classes = [];
       foreach ($args as $arg) {
         // Merge the values passed in from the classes array.
         // The argument is cast to an array to support comma separated single
@@ -245,7 +245,7 @@ public function removeClass() {
     // With no class attribute, there is no need to remove.
     if (isset($this->storage['class']) && $this->storage['class'] instanceof AttributeArray) {
       $args = func_get_args();
-      $classes = array();
+      $classes = [];
       foreach ($args as $arg) {
         // Merge the values passed in from the classes array.
         // The argument is cast to an array to support comma separated single
diff --git a/core/lib/Drupal/Core/Template/Loader/FilesystemLoader.php b/core/lib/Drupal/Core/Template/Loader/FilesystemLoader.php
index abd4ef24fd26b1c936017911790b315479ae8c5b..3f727cf52386daf4c94a17e8e8dfa0aa1979a808 100644
--- a/core/lib/Drupal/Core/Template/Loader/FilesystemLoader.php
+++ b/core/lib/Drupal/Core/Template/Loader/FilesystemLoader.php
@@ -24,11 +24,11 @@ class FilesystemLoader extends \Twig_Loader_Filesystem {
    * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
    *   The theme handler service.
    */
-  public function __construct($paths = array(), ModuleHandlerInterface $module_handler, ThemeHandlerInterface $theme_handler) {
+  public function __construct($paths = [], ModuleHandlerInterface $module_handler, ThemeHandlerInterface $theme_handler) {
     parent::__construct($paths);
 
     // Add namespaced paths for modules and themes.
-    $namespaces = array();
+    $namespaces = [];
     foreach ($module_handler->getModuleList() as $name => $extension) {
       $namespaces[$name] = $extension->getPath();
     }
@@ -51,7 +51,7 @@ public function __construct($paths = array(), ModuleHandlerInterface $module_han
    */
   public function addPath($path, $namespace = self::MAIN_NAMESPACE) {
     // Invalidate the cache.
-    $this->cache = array();
+    $this->cache = [];
     $this->paths[$namespace][] = rtrim($path, '/\\');
   }
 
diff --git a/core/lib/Drupal/Core/Template/TwigEnvironment.php b/core/lib/Drupal/Core/Template/TwigEnvironment.php
index f5ee4597675d0170d682db9b0356be38b909a5ef..21755a5057c728d0e12fc46e3b81eb455a2963f3 100644
--- a/core/lib/Drupal/Core/Template/TwigEnvironment.php
+++ b/core/lib/Drupal/Core/Template/TwigEnvironment.php
@@ -42,19 +42,19 @@ class TwigEnvironment extends \Twig_Environment {
    * @param array $options
    *   The options for the Twig environment.
    */
-  public function __construct($root, CacheBackendInterface $cache, $twig_extension_hash, StateInterface $state, \Twig_LoaderInterface $loader = NULL, $options = array()) {
+  public function __construct($root, CacheBackendInterface $cache, $twig_extension_hash, StateInterface $state, \Twig_LoaderInterface $loader = NULL, $options = []) {
     // Ensure that twig.engine is loaded, given that it is needed to render a
     // template because functions like TwigExtension::escapeFilter() are called.
     require_once $root . '/core/themes/engines/twig/twig.engine';
 
-    $this->templateClasses = array();
+    $this->templateClasses = [];
 
-    $options += array(
+    $options += [
       // @todo Ensure garbage collection of expired files.
       'cache' => TRUE,
       'debug' => FALSE,
       'auto_reload' => NULL,
-    );
+    ];
     // Ensure autoescaping is always on.
     $options['autoescape'] = 'html';
 
@@ -137,7 +137,7 @@ public function getTemplateClass($name, $index = NULL) {
    *
    * @see \Drupal\Core\Template\Loader\StringLoader::exists()
    */
-  public function renderInline($template_string, array $context = array()) {
+  public function renderInline($template_string, array $context = []) {
     // Prefix all inline templates with a special comment.
     $template_string = '{# inline_template_start #}' . $template_string;
     return Markup::create($this->loadTemplate($template_string, NULL)->render($context));
diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 9f259598cbe2ae7389d2258d923bb744063e3f82..520a8beb25f291489d289fd39d80a26add0167fd 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -137,12 +137,12 @@ public function setDateFormatter(DateFormatterInterface $date_formatter) {
   public function getFunctions() {
     return [
       // This function will receive a renderable array, if an array is detected.
-      new \Twig_SimpleFunction('render_var', array($this, 'renderVar')),
+      new \Twig_SimpleFunction('render_var', [$this, 'renderVar']),
       // The url and path function are defined in close parallel to those found
       // in \Symfony\Bridge\Twig\Extension\RoutingExtension
-      new \Twig_SimpleFunction('url', array($this, 'getUrl'), array('is_safe_callback' => array($this, 'isUrlGenerationSafe'))),
-      new \Twig_SimpleFunction('path', array($this, 'getPath'), array('is_safe_callback' => array($this, 'isUrlGenerationSafe'))),
-      new \Twig_SimpleFunction('link', array($this, 'getLink')),
+      new \Twig_SimpleFunction('url', [$this, 'getUrl'], ['is_safe_callback' => [$this, 'isUrlGenerationSafe']]),
+      new \Twig_SimpleFunction('path', [$this, 'getPath'], ['is_safe_callback' => [$this, 'isUrlGenerationSafe']]),
+      new \Twig_SimpleFunction('link', [$this, 'getLink']),
       new \Twig_SimpleFunction('file_url', function ($uri) {
         return file_url_transform_relative(file_create_url($uri));
       }),
@@ -157,19 +157,19 @@ public function getFunctions() {
    * {@inheritdoc}
    */
   public function getFilters() {
-    return array(
+    return [
       // Translation filters.
-      new \Twig_SimpleFilter('t', 't', array('is_safe' => array('html'))),
-      new \Twig_SimpleFilter('trans', 't', array('is_safe' => array('html'))),
+      new \Twig_SimpleFilter('t', 't', ['is_safe' => ['html']]),
+      new \Twig_SimpleFilter('trans', 't', ['is_safe' => ['html']]),
       // The "raw" filter is not detectable when parsing "trans" tags. To detect
       // which prefix must be used for translation (@, !, %), we must clone the
       // "raw" filter and give it identifiable names. These filters should only
       // be used in "trans" tags.
       // @see TwigNodeTrans::compileString()
-      new \Twig_SimpleFilter('placeholder', [$this, 'escapePlaceholder'], array('is_safe' => array('html'), 'needs_environment' => TRUE)),
+      new \Twig_SimpleFilter('placeholder', [$this, 'escapePlaceholder'], ['is_safe' => ['html'], 'needs_environment' => TRUE]),
 
       // Replace twig's escape filter with our own.
-      new \Twig_SimpleFilter('drupal_escape', [$this, 'escapeFilter'], array('needs_environment' => TRUE, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
+      new \Twig_SimpleFilter('drupal_escape', [$this, 'escapeFilter'], ['needs_environment' => TRUE, 'is_safe_callback' => 'twig_escape_filter_is_safe']),
 
       // Implements safe joining.
       // @todo Make that the default for |join? Upstream issue:
@@ -183,9 +183,9 @@ public function getFilters() {
       new \Twig_SimpleFilter('clean_class', '\Drupal\Component\Utility\Html::getClass'),
       new \Twig_SimpleFilter('clean_id', '\Drupal\Component\Utility\Html::getId'),
       // This filter will render a renderable array to use the string results.
-      new \Twig_SimpleFilter('render', array($this, 'renderVar')),
-      new \Twig_SimpleFilter('format_date', array($this->dateFormatter, 'format')),
-    );
+      new \Twig_SimpleFilter('render', [$this, 'renderVar']),
+      new \Twig_SimpleFilter('format_date', [$this->dateFormatter, 'format']),
+    ];
   }
 
   /**
@@ -194,18 +194,18 @@ public function getFilters() {
   public function getNodeVisitors() {
     // The node visitor is needed to wrap all variables with
     // render_var -> TwigExtension->renderVar() function.
-    return array(
+    return [
       new TwigNodeVisitor(),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getTokenParsers() {
-    return array(
+    return [
       new TwigTransTokenParser(),
-    );
+    ];
   }
 
   /**
@@ -231,7 +231,7 @@ public function getName() {
    *
    * @see \Drupal\Core\Routing\UrlGeneratorInterface::generateFromRoute()
    */
-  public function getPath($name, $parameters = array(), $options = array()) {
+  public function getPath($name, $parameters = [], $options = []) {
     $options['absolute'] = FALSE;
     return $this->urlGenerator->generateFromRoute($name, $parameters, $options);
   }
@@ -252,7 +252,7 @@ public function getPath($name, $parameters = array(), $options = array()) {
    *
    * @todo Add an option for scheme-relative URLs.
    */
-  public function getUrl($name, $parameters = array(), $options = array()) {
+  public function getUrl($name, $parameters = [], $options = []) {
     // Generate URL.
     $options['absolute'] = TRUE;
     $generated_url = $this->urlGenerator->generateFromRoute($name, $parameters, $options, TRUE);
@@ -356,10 +356,10 @@ public function isUrlGenerationSafe(\Twig_Node $args_node) {
 
     if (!isset($parameter_node) || $parameter_node instanceof \Twig_Node_Expression_Array && count($parameter_node) <= 2 &&
         (!$parameter_node->hasNode(1) || $parameter_node->getNode(1) instanceof \Twig_Node_Expression_Constant)) {
-      return array('html');
+      return ['html'];
     }
 
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Template/TwigNodeTrans.php b/core/lib/Drupal/Core/Template/TwigNodeTrans.php
index 21006fd1ed382f07797396adad9f233023aab773..264a511172bfc3e332db986dbdb80f63f50fb357 100644
--- a/core/lib/Drupal/Core/Template/TwigNodeTrans.php
+++ b/core/lib/Drupal/Core/Template/TwigNodeTrans.php
@@ -18,12 +18,12 @@ class TwigNodeTrans extends \Twig_Node {
    * {@inheritdoc}
    */
   public function __construct(\Twig_Node $body, \Twig_Node $plural = NULL, \Twig_Node_Expression $count = NULL, \Twig_Node_Expression $options = NULL, $lineno, $tag = NULL) {
-    parent::__construct(array(
+    parent::__construct([
       'count' => $count,
       'body' => $body,
       'plural' => $plural,
       'options' => $options,
-    ), array(), $lineno, $tag);
+    ], [], $lineno, $tag);
   }
 
   /**
@@ -95,10 +95,10 @@ public function compile(\Twig_Compiler $compiler) {
    */
   protected function compileString(\Twig_Node $body) {
     if ($body instanceof \Twig_Node_Expression_Name || $body instanceof \Twig_Node_Expression_Constant || $body instanceof \Twig_Node_Expression_TempName) {
-      return array($body, array());
+      return [$body, []];
     }
 
-    $tokens = array();
+    $tokens = [];
     if (count($body)) {
       $text = '';
 
@@ -135,7 +135,7 @@ protected function compileString(\Twig_Node $body) {
             $args = $args->getNode('node');
           }
           if ($args instanceof \Twig_Node_Expression_GetAttr) {
-            $argName = array();
+            $argName = [];
             // Reuse the incoming expression.
             $expr = $args;
             // Assemble a valid argument name by walking through the expression.
@@ -176,7 +176,7 @@ protected function compileString(\Twig_Node $body) {
       $text = $body->getAttribute('data');
     }
 
-    return array(new \Twig_Node(array(new \Twig_Node_Expression_Constant(trim($text), $body->getLine()))), $tokens);
+    return [new \Twig_Node([new \Twig_Node_Expression_Constant(trim($text), $body->getLine())]), $tokens];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Template/TwigNodeVisitor.php b/core/lib/Drupal/Core/Template/TwigNodeVisitor.php
index 6222d69e3a9984ac92aec5980e0b8a6cb50e9431..1ebfa57de92aac065b397b158fdfcaacab0da9e6 100644
--- a/core/lib/Drupal/Core/Template/TwigNodeVisitor.php
+++ b/core/lib/Drupal/Core/Template/TwigNodeVisitor.php
@@ -35,7 +35,7 @@ protected function doLeaveNode(\Twig_Node $node, \Twig_Environment $env) {
       $class = get_class($node);
       $line = $node->getLine();
       return new $class(
-        new \Twig_Node_Expression_Function('render_var', new \Twig_Node(array($node->getNode('expr'))), $line),
+        new \Twig_Node_Expression_Function('render_var', new \Twig_Node([$node->getNode('expr')]), $line),
         $line
       );
     }
diff --git a/core/lib/Drupal/Core/Template/TwigTransTokenParser.php b/core/lib/Drupal/Core/Template/TwigTransTokenParser.php
index fb160175375ea328872e10279bd16fec1ebb2ccd..96f55607f354b6e8dd3aabf24aa0e50ce4bd3c1e 100644
--- a/core/lib/Drupal/Core/Template/TwigTransTokenParser.php
+++ b/core/lib/Drupal/Core/Template/TwigTransTokenParser.php
@@ -35,11 +35,11 @@ public function parse(\Twig_Token $token) {
     }
     if (!$body) {
       $stream->expect(\Twig_Token::BLOCK_END_TYPE);
-      $body = $this->parser->subparse(array($this, 'decideForFork'));
+      $body = $this->parser->subparse([$this, 'decideForFork']);
       if ('plural' === $stream->next()->getValue()) {
         $count = $this->parser->getExpressionParser()->parseExpression();
         $stream->expect(\Twig_Token::BLOCK_END_TYPE);
-        $plural = $this->parser->subparse(array($this, 'decideForEnd'), TRUE);
+        $plural = $this->parser->subparse([$this, 'decideForEnd'], TRUE);
       }
     }
 
@@ -56,7 +56,7 @@ public function parse(\Twig_Token $token) {
    * Detect a 'plural' switch or the end of a 'trans' tag.
    */
   public function decideForFork($token) {
-    return $token->test(array('plural', 'endtrans'));
+    return $token->test(['plural', 'endtrans']);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php b/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
index 25571b96a2b341e6ccf52a8edcb63552cc6bcb13..e9d8d6686ef2593f4b8cf15e829db7273973c8bf 100644
--- a/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
+++ b/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
@@ -37,7 +37,7 @@ trait FunctionalTestSetupTrait {
   /**
    * The config directories used in this test.
    */
-  protected $configDirectories = array();
+  protected $configDirectories = [];
 
   /**
    * Prepares site settings and services before installation.
@@ -218,7 +218,7 @@ protected function refreshVariables() {
     // Clear the tag cache.
     \Drupal::service('cache_tags.invalidator')->resetChecksums();
     foreach (Cache::getBins() as $backend) {
-      if (is_callable(array($backend, 'reset'))) {
+      if (is_callable([$backend, 'reset'])) {
         $backend->reset();
       }
     }
@@ -244,7 +244,7 @@ protected function refreshVariables() {
    * @return \Symfony\Component\HttpFoundation\Request
    *   The mocked request object.
    */
-  protected function prepareRequestForGenerator($clean_urls = TRUE, $override_server_vars = array()) {
+  protected function prepareRequestForGenerator($clean_urls = TRUE, $override_server_vars = []) {
     $request = Request::createFromGlobals();
     $server = $request->server->all();
     if (basename($server['SCRIPT_FILENAME']) != basename($server['SCRIPT_NAME'])) {
@@ -266,7 +266,7 @@ protected function prepareRequestForGenerator($clean_urls = TRUE, $override_serv
     }
     $server = array_merge($server, $override_server_vars);
 
-    $request = Request::create($request_path, 'GET', array(), array(), array(), $server);
+    $request = Request::create($request_path, 'GET', [], [], [], $server);
     // Ensure the request time is REQUEST_TIME to ensure that API calls
     // in the test use the right timestamp.
     $request->server->set('REQUEST_TIME', REQUEST_TIME);
@@ -361,14 +361,14 @@ protected function initConfig(ContainerInterface $container) {
   protected function initUserSession() {
     $password = $this->randomMachineName();
     // Define information about the user 1 account.
-    $this->rootUser = new UserSession(array(
+    $this->rootUser = new UserSession([
       'uid' => 1,
       'name' => 'admin',
       'mail' => 'admin@example.com',
       'pass_raw' => $password,
       'passRaw' => $password,
       'timezone' => date_default_timezone_get(),
-    ));
+    ]);
 
     // The child site derives its session name from the database prefix when
     // running web tests.
diff --git a/core/lib/Drupal/Core/Test/TestRunnerKernel.php b/core/lib/Drupal/Core/Test/TestRunnerKernel.php
index f76e82c1d7afcecd4018690760f10231a3063943..5be2b83669aa53c75ba9558d6f548ee483065650 100644
--- a/core/lib/Drupal/Core/Test/TestRunnerKernel.php
+++ b/core/lib/Drupal/Core/Test/TestRunnerKernel.php
@@ -33,14 +33,14 @@ public function __construct($environment, $class_loader, $allow_dumping = FALSE,
     //   \Drupal\Core\Datetime\DateFormatter has a (needless) dependency on the
     //   'date_format' entity, so calls to format_date()/format_interval() cause
     //   a plugin not found exception.
-    $this->moduleList = array(
+    $this->moduleList = [
       'system' => 0,
       'simpletest' => 0,
-    );
-    $this->moduleData = array(
+    ];
+    $this->moduleData = [
       'system' => new Extension($this->root, 'module', 'core/modules/system/system.info.yml', 'system.module'),
       'simpletest' => new Extension($this->root, 'module', 'core/modules/simpletest/simpletest.info.yml', 'simpletest.module'),
-    );
+    ];
   }
 
   /**
@@ -49,13 +49,13 @@ public function __construct($environment, $class_loader, $allow_dumping = FALSE,
   public function boot() {
     // Ensure that required Settings exist.
     if (!Settings::getAll()) {
-      new Settings(array(
+      new Settings([
         'hash_salt' => 'run-tests',
         'container_yamls' => [],
         // If there is no settings.php, then there is no parent site. In turn,
         // there is no public files directory; use a custom public files path.
         'file_public_path' => 'sites/default/files',
-      ));
+      ]);
     }
 
     // Remove Drupal's error/exception handlers; they are designed for HTML
diff --git a/core/lib/Drupal/Core/Test/TestSetupTrait.php b/core/lib/Drupal/Core/Test/TestSetupTrait.php
index 31849c825e180aad3561ebdf16aad0a670f2be45..ea9137e479767669ed12c6f3ca0c56366e75a45b 100644
--- a/core/lib/Drupal/Core/Test/TestSetupTrait.php
+++ b/core/lib/Drupal/Core/Test/TestSetupTrait.php
@@ -14,7 +14,7 @@ trait TestSetupTrait {
    *
    * @var string[]
    */
-  protected static $configSchemaCheckerExclusions = array(
+  protected static $configSchemaCheckerExclusions = [
     // Following are used to test lack of or partial schema. Where partial
     // schema is provided, that is explicitly tested in specific tests.
     'config_schema_test.noschema',
@@ -23,7 +23,7 @@ trait TestSetupTrait {
     'config_schema_test.no_schema_data_types',
     // Used to test application of schema to filtering of configuration.
     'config_test.dynamic.system',
-  );
+  ];
 
   /**
    * The dependency injection container used in the test.
@@ -172,9 +172,9 @@ private function changeDatabasePrefix() {
       foreach ($connection_info as $target => $value) {
         // Replace the full table prefix definition to ensure that no table
         // prefixes of the test runner leak into the test.
-        $connection_info[$target]['prefix'] = array(
+        $connection_info[$target]['prefix'] = [
           'default' => $value['prefix']['default'] . $this->databasePrefix,
-        );
+        ];
       }
       Database::addConnectionInfo('default', 'default', $connection_info['default']);
     }
diff --git a/core/lib/Drupal/Core/Theme/Registry.php b/core/lib/Drupal/Core/Theme/Registry.php
index a3054e300d5200d8f8e2226b4acff43eb25fdb6c..a0af70261cbef14161bc05b84e9399fa5d1acfca 100644
--- a/core/lib/Drupal/Core/Theme/Registry.php
+++ b/core/lib/Drupal/Core/Theme/Registry.php
@@ -249,7 +249,7 @@ public function get() {
   public function getRuntime() {
     $this->init($this->themeName);
     if (!isset($this->runtimeRegistry[$this->theme->getName()])) {
-      $this->runtimeRegistry[$this->theme->getName()] = new ThemeRegistry('theme_registry:runtime:' . $this->theme->getName(), $this->runtimeCache ?: $this->cache, $this->lock, array('theme_registry'), $this->moduleHandler->isLoaded());
+      $this->runtimeRegistry[$this->theme->getName()] = new ThemeRegistry('theme_registry:runtime:' . $this->theme->getName(), $this->runtimeCache ?: $this->cache, $this->lock, ['theme_registry'], $this->moduleHandler->isLoaded());
     }
     return $this->runtimeRegistry[$this->theme->getName()];
   }
@@ -258,7 +258,7 @@ public function getRuntime() {
    * Persists the theme registry in the cache backend.
    */
   protected function setCache() {
-    $this->cache->set('theme_registry:' . $this->theme->getName(), $this->registry[$this->theme->getName()], Cache::PERMANENT, array('theme_registry'));
+    $this->cache->set('theme_registry:' . $this->theme->getName(), $this->registry[$this->theme->getName()], Cache::PERMANENT, ['theme_registry']);
   }
 
   /**
@@ -320,7 +320,7 @@ public function getBaseHook($hook) {
    * @see hook_theme_registry_alter()
    */
   protected function build() {
-    $cache = array();
+    $cache = [];
     // First, preprocess the theme hooks advertised by modules. This will
     // serve as the basic registry. Since the list of enabled modules is the
     // same regardless of the theme used, this is cached in its own entry to
@@ -334,7 +334,7 @@ protected function build() {
       }
       // Only cache this registry if all modules are loaded.
       if ($this->moduleHandler->isLoaded()) {
-        $this->cache->set("theme_registry:build:modules", $cache, Cache::PERMANENT, array('theme_registry'));
+        $this->cache->set("theme_registry:build:modules", $cache, Cache::PERMANENT, ['theme_registry']);
       }
     }
 
@@ -428,14 +428,14 @@ protected function build() {
    * @throws \BadFunctionCallException
    */
   protected function processExtension(array &$cache, $name, $type, $theme, $path) {
-    $result = array();
+    $result = [];
 
-    $hook_defaults = array(
+    $hook_defaults = [
       'variables' => TRUE,
       'render element' => TRUE,
       'pattern' => TRUE,
       'base hook' => TRUE,
-    );
+    ];
 
     $module_list = array_keys($this->moduleHandler->getModuleList());
 
@@ -519,8 +519,8 @@ protected function processExtension(array &$cache, $name, $type, $theme, $path)
         // Preprocess variables for all theming hooks, whether the hook is
         // implemented as a template or as a function. Ensure they are arrays.
         if (!isset($info['preprocess functions']) || !is_array($info['preprocess functions'])) {
-          $info['preprocess functions'] = array();
-          $prefixes = array();
+          $info['preprocess functions'] = [];
+          $prefixes = [];
           if ($type == 'module') {
             // Default variable preprocessor prefix.
             $prefixes[] = 'template';
@@ -578,7 +578,7 @@ protected function processExtension(array &$cache, $name, $type, $theme, $path)
         // Check only if not registered by the theme or engine.
         if (empty($result[$hook])) {
           if (!isset($info['preprocess functions'])) {
-            $cache[$hook]['preprocess functions'] = array();
+            $cache[$hook]['preprocess functions'] = [];
           }
           // Only use non-hook-specific variable preprocessors for theme hooks
           // implemented as templates. See the @defgroup themeable topic.
@@ -605,7 +605,7 @@ protected function processExtension(array &$cache, $name, $type, $theme, $path)
    */
   protected function completeSuggestion($hook, array &$cache) {
     $previous_hook = $hook;
-    $incomplete_previous_hook = array();
+    $incomplete_previous_hook = [];
     // Continue looping if the candidate hook doesn't exist or if the candidate
     // hook has incomplete preprocess functions, and if the candidate hook is a
     // suggestion (has a double underscore).
@@ -767,7 +767,7 @@ public function reset() {
     $this->runtimeRegistry = [];
 
     $this->registry = [];
-    Cache::invalidateTags(array('theme_registry'));
+    Cache::invalidateTags(['theme_registry']);
     return $this;
   }
 
@@ -788,7 +788,7 @@ public function destruct() {
    * @return array
    *   Functions grouped by the first prefix.
    */
-  public function getPrefixGroupedUserFunctions($prefixes = array()) {
+  public function getPrefixGroupedUserFunctions($prefixes = []) {
     $functions = get_defined_functions();
 
     // If a list of prefixes is supplied, trim down the list to those items
diff --git a/core/lib/Drupal/Core/Theme/ThemeInitialization.php b/core/lib/Drupal/Core/Theme/ThemeInitialization.php
index bf585844ba05420c192681a329f8daa82caea26d..95ce5f3e95101d9abc59b4d364f96493818e8c2f 100644
--- a/core/lib/Drupal/Core/Theme/ThemeInitialization.php
+++ b/core/lib/Drupal/Core/Theme/ThemeInitialization.php
@@ -100,7 +100,7 @@ public function getActiveThemeByName($theme_name) {
     }
 
     // Find all our ancestor themes and put them in an array.
-    $base_themes = array();
+    $base_themes = [];
     $ancestor = $theme_name;
     while ($ancestor && isset($themes[$ancestor]->base_theme)) {
       $ancestor = $themes[$ancestor]->base_theme;
@@ -220,7 +220,7 @@ public function getActiveTheme(Extension $theme, array $base_themes = []) {
     }
 
     // Do basically the same as the above for libraries
-    $values['libraries'] = array();
+    $values['libraries'] = [];
 
     // Grab libraries from base theme
     foreach ($base_themes as $base) {
@@ -242,7 +242,7 @@ public function getActiveTheme(Extension $theme, array $base_themes = []) {
     $values['owner'] = isset($theme->owner) ? $theme->owner : NULL;
     $values['extension'] = $theme;
 
-    $base_active_themes = array();
+    $base_active_themes = [];
     foreach ($base_themes as $base_theme) {
       $base_active_themes[$base_theme->getName()] = $this->getActiveTheme($base_theme, array_slice($base_themes, 1));
     }
@@ -310,7 +310,7 @@ protected function prepareStylesheetsRemove(Extension $theme, $base_themes) {
     // Prepare stylesheets from this theme as well as all ancestor themes.
     // We work it this way so that we can have child themes remove CSS files
     // easily from parent.
-    $stylesheets_remove = array();
+    $stylesheets_remove = [];
     // Grab stylesheets from base theme.
     foreach ($base_themes as $base) {
       if (!empty($base->info['stylesheets-remove'])) {
diff --git a/core/lib/Drupal/Core/Theme/ThemeManager.php b/core/lib/Drupal/Core/Theme/ThemeManager.php
index ed18039f7d4a04837d38df4bb4d08ac6ae6369bc..c58d176d45105059fe4060e6c5f9aeb51be01ef8 100644
--- a/core/lib/Drupal/Core/Theme/ThemeManager.php
+++ b/core/lib/Drupal/Core/Theme/ThemeManager.php
@@ -171,7 +171,7 @@ public function render($hook, array $variables) {
         // Only log a message when not trying theme suggestions ($hook being an
         // array).
         if (!isset($candidate)) {
-          \Drupal::logger('theme')->warning('Theme hook %hook not found.', array('%hook' => $hook));
+          \Drupal::logger('theme')->warning('Theme hook %hook not found.', ['%hook' => $hook]);
         }
         // There is no theme implementation for the hook passed. Return FALSE so
         // the function calling
@@ -188,7 +188,7 @@ public function render($hook, array $variables) {
     // the arguments expected by the theme function.
     if (isset($variables['#theme']) || isset($variables['#theme_wrappers'])) {
       $element = $variables;
-      $variables = array();
+      $variables = [];
       if (isset($info['variables'])) {
         foreach (array_keys($info['variables']) as $name) {
           if (isset($element["#$name"]) || array_key_exists("#$name", $element)) {
@@ -208,12 +208,12 @@ public function render($hook, array $variables) {
       $variables += $info['variables'];
     }
     elseif (!empty($info['render element'])) {
-      $variables += array($info['render element'] => array());
+      $variables += [$info['render element'] => []];
     }
     // Supply original caller info.
-    $variables += array(
+    $variables += [
       'theme_hook_original' => $original_hook,
-    );
+    ];
 
     // Set base hook for later use. For example if '#theme' => 'node__article'
     // is called, we run hook_theme_suggestions_node_alter() rather than
@@ -227,7 +227,7 @@ public function render($hook, array $variables) {
     }
 
     // Invoke hook_theme_suggestions_HOOK().
-    $suggestions = $this->moduleHandler->invokeAll('theme_suggestions_' . $base_theme_hook, array($variables));
+    $suggestions = $this->moduleHandler->invokeAll('theme_suggestions_' . $base_theme_hook, [$variables]);
     // If the theme implementation was invoked with a direct theme suggestion
     // like '#theme' => 'node__article', add it to the suggestions array before
     // invoking suggestion alter hooks.
@@ -237,10 +237,10 @@ public function render($hook, array $variables) {
 
     // Invoke hook_theme_suggestions_alter() and
     // hook_theme_suggestions_HOOK_alter().
-    $hooks = array(
+    $hooks = [
       'theme_suggestions',
       'theme_suggestions_' . $base_theme_hook,
-    );
+    ];
     $this->moduleHandler->alter($hooks, $suggestions, $variables, $base_theme_hook);
     $this->alter($hooks, $suggestions, $variables, $base_theme_hook);
 
@@ -347,14 +347,14 @@ public function render($hook, array $variables) {
       // intuitive, is reasonably safe, and allows us to save on the overhead of
       // adding some new variable to track that.
       if (!isset($variables['directory'])) {
-        $default_template_variables = array();
+        $default_template_variables = [];
         template_preprocess($default_template_variables, $hook, $info);
         $variables += $default_template_variables;
       }
       if (!isset($default_attributes)) {
         $default_attributes = new Attribute();
       }
-      foreach (array('attributes', 'title_attributes', 'content_attributes') as $key) {
+      foreach (['attributes', 'title_attributes', 'content_attributes'] as $key) {
         if (isset($variables[$key]) && !($variables[$key] instanceof Attribute)) {
           if ($variables[$key]) {
             $variables[$key] = new Attribute($variables[$key]);
@@ -427,13 +427,13 @@ public function alterForTheme(ActiveTheme $theme, $type, &$data, &$context1 = NU
       }
     }
 
-    $theme_keys = array();
+    $theme_keys = [];
     foreach ($theme->getBaseThemes() as $base) {
       $theme_keys[] = $base->getName();
     }
 
     $theme_keys[] = $theme->getName();
-    $functions = array();
+    $functions = [];
     foreach ($theme_keys as $theme_key) {
       $function = $theme_key . '_' . $type . '_alter';
       if (function_exists($function)) {
diff --git a/core/lib/Drupal/Core/Theme/ThemeNegotiator.php b/core/lib/Drupal/Core/Theme/ThemeNegotiator.php
index 3064eb073e6598c5e21bef6a22364ac6d35af8f1..c932e89d532127a6b63def2a5d265084810bf466 100644
--- a/core/lib/Drupal/Core/Theme/ThemeNegotiator.php
+++ b/core/lib/Drupal/Core/Theme/ThemeNegotiator.php
@@ -17,7 +17,7 @@ class ThemeNegotiator implements ThemeNegotiatorInterface {
    *
    * @var array
    */
-  protected $negotiators = array();
+  protected $negotiators = [];
 
   /**
    * Holds the array of theme negotiators sorted by priority.
@@ -71,7 +71,7 @@ protected function getSortedNegotiators() {
       krsort($this->negotiators);
       // Merge nested negotiators from $this->negotiators into
       // $this->sortedNegotiators.
-      $this->sortedNegotiators = array();
+      $this->sortedNegotiators = [];
       foreach ($this->negotiators as $builders) {
         $this->sortedNegotiators = array_merge($this->sortedNegotiators, $builders);
       }
diff --git a/core/lib/Drupal/Core/TypedData/DataDefinition.php b/core/lib/Drupal/Core/TypedData/DataDefinition.php
index d0878ede45a158ce3dbb6dc41a051744cd57c0c2..7eec1a90c457736e8ec2a1e3017ae124578633b0 100644
--- a/core/lib/Drupal/Core/TypedData/DataDefinition.php
+++ b/core/lib/Drupal/Core/TypedData/DataDefinition.php
@@ -12,7 +12,7 @@ class DataDefinition implements DataDefinitionInterface, \ArrayAccess {
    *
    * @var array
    */
-  protected $definition = array();
+  protected $definition = [];
 
   /**
    * Creates a new data definition.
@@ -41,7 +41,7 @@ public static function createFromDataType($type) {
    * @param array $values
    *   (optional) If given, an array of initial values to set on the definition.
    */
-  public function __construct(array $values = array()) {
+  public function __construct(array $values = []) {
     $this->definition = $values;
   }
 
@@ -213,7 +213,7 @@ public function setClass($class) {
    * {@inheritdoc}
    */
   public function getSettings() {
-    return isset($this->definition['settings']) ? $this->definition['settings'] : array();
+    return isset($this->definition['settings']) ? $this->definition['settings'] : [];
   }
 
   /**
@@ -257,7 +257,7 @@ public function setSetting($setting_name, $value) {
    * {@inheritdoc}
    */
   public function getConstraints() {
-    $constraints = isset($this->definition['constraints']) ? $this->definition['constraints'] : array();
+    $constraints = isset($this->definition['constraints']) ? $this->definition['constraints'] : [];
     $constraints += \Drupal::typedDataManager()->getDefaultConstraints($this);
     return $constraints;
   }
diff --git a/core/lib/Drupal/Core/TypedData/ListDataDefinition.php b/core/lib/Drupal/Core/TypedData/ListDataDefinition.php
index 302f501be52567046665399f76d9d9dbb3031ea6..3109cd2115678dd37f4b520930e1c83b12715fd8 100644
--- a/core/lib/Drupal/Core/TypedData/ListDataDefinition.php
+++ b/core/lib/Drupal/Core/TypedData/ListDataDefinition.php
@@ -41,13 +41,13 @@ public static function createFromDataType($type) {
    * {@inheritdoc}
    */
   public static function createFromItemType($item_type) {
-    return new static(array(), \Drupal::typedDataManager()->createDataDefinition($item_type));
+    return new static([], \Drupal::typedDataManager()->createDataDefinition($item_type));
   }
 
   /**
    * {@inheritdoc}
    */
-  public function __construct(array $values = array(), DataDefinitionInterface $item_definition = NULL) {
+  public function __construct(array $values = [], DataDefinitionInterface $item_definition = NULL) {
     $this->definition = $values;
     $this->itemDefinition = $item_definition;
   }
diff --git a/core/lib/Drupal/Core/TypedData/MapDataDefinition.php b/core/lib/Drupal/Core/TypedData/MapDataDefinition.php
index 067a0f413fc625f40b3f9b32ecc4e9b35a4cc6f8..203e4a367edd1d2df51417aea7619ece317ec93f 100644
--- a/core/lib/Drupal/Core/TypedData/MapDataDefinition.php
+++ b/core/lib/Drupal/Core/TypedData/MapDataDefinition.php
@@ -39,7 +39,7 @@ public static function createFromDataType($data_type) {
    */
   public function getPropertyDefinitions() {
     if (!isset($this->propertyDefinitions)) {
-      $this->propertyDefinitions = array();
+      $this->propertyDefinitions = [];
     }
     return $this->propertyDefinitions;
   }
diff --git a/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php b/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php
index 77334272380bf7c589ece4030624fe6713ec937d..4f756dadf2540b9b15e9d4e37f5d353f1b02c67e 100644
--- a/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php
+++ b/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php
@@ -30,13 +30,13 @@ class ItemList extends TypedData implements \IteratorAggregate, ListInterface {
    *
    * @var \Drupal\Core\TypedData\TypedDataInterface[]
    */
-  protected $list = array();
+  protected $list = [];
 
   /**
    * {@inheritdoc}
    */
   public function getValue() {
-    $values = array();
+    $values = [];
     foreach ($this->list as $delta => $item) {
       $values[$delta] = $item->getValue();
     }
@@ -50,8 +50,8 @@ public function getValue() {
    *   An array of values of the field items, or NULL to unset the field.
    */
   public function setValue($values, $notify = TRUE) {
-    if (!isset($values) || $values === array()) {
-      $this->list = array();
+    if (!isset($values) || $values === []) {
+      $this->list = [];
     }
     else {
       // Only arrays with numeric keys are supported.
@@ -82,7 +82,7 @@ public function setValue($values, $notify = TRUE) {
    * {@inheritdoc}
    */
   public function getString() {
-    $strings = array();
+    $strings = [];
     foreach ($this->list as $item) {
       $strings[] = $item->getString();
     }
diff --git a/core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php b/core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php
index 3af3a6b3080155e77d2394b96d54ef317c743c1b..a95c14b30e3b06d27ac68397f29cb3faeeb20b82 100644
--- a/core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php
+++ b/core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php
@@ -38,14 +38,14 @@ class Map extends TypedData implements \IteratorAggregate, ComplexDataInterface
    *
    * @var array
    */
-  protected $values = array();
+  protected $values = [];
 
   /**
    * The array of properties.
    *
    * @var \Drupal\Core\TypedData\TypedDataInterface[]
    */
-  protected $properties = array();
+  protected $properties = [];
 
   /**
    * {@inheritdoc}
@@ -95,7 +95,7 @@ public function setValue($values, $notify = TRUE) {
    * {@inheritdoc}
    */
   public function getString() {
-    $strings = array();
+    $strings = [];
     foreach ($this->getProperties() as $property) {
       $strings[] = $property->getString();
     }
@@ -154,7 +154,7 @@ protected function writePropertyValue($property_name, $value) {
    * {@inheritdoc}
    */
   public function getProperties($include_computed = FALSE) {
-    $properties = array();
+    $properties = [];
     foreach ($this->definition->getPropertyDefinitions() as $name => $definition) {
       if ($include_computed || !$definition->isComputed()) {
         $properties[$name] = $this->get($name);
@@ -167,7 +167,7 @@ public function getProperties($include_computed = FALSE) {
    * {@inheritdoc}
    */
   public function toArray() {
-    $values = array();
+    $values = [];
     foreach ($this->getProperties() as $name => $property) {
       $values[$name] = $property->getValue();
     }
diff --git a/core/lib/Drupal/Core/TypedData/TranslatableInterface.php b/core/lib/Drupal/Core/TypedData/TranslatableInterface.php
index 5100e6e6395d01760e8aa816b73bb4d267e8e355..5b57a8717f13bc96e102ebd65d234e8fccb51872 100644
--- a/core/lib/Drupal/Core/TypedData/TranslatableInterface.php
+++ b/core/lib/Drupal/Core/TypedData/TranslatableInterface.php
@@ -95,7 +95,7 @@ public function hasTranslation($langcode);
    * @throws \InvalidArgumentException
    *   If an invalid or existing translation language is specified.
    */
-  public function addTranslation($langcode, array $values = array());
+  public function addTranslation($langcode, array $values = []);
 
   /**
    * Removes the translation identified by the given language code.
diff --git a/core/lib/Drupal/Core/TypedData/TypedData.php b/core/lib/Drupal/Core/TypedData/TypedData.php
index 809d0e63b302fe1c84219a15a5c012d1cd328a5d..243d48a92f6a19af4547e8a717a1836ed2a2af97 100644
--- a/core/lib/Drupal/Core/TypedData/TypedData.php
+++ b/core/lib/Drupal/Core/TypedData/TypedData.php
@@ -121,7 +121,7 @@ public function getString() {
    */
   public function getConstraints() {
     $constraint_manager = $this->getTypedDataManager()->getValidationConstraintManager();
-    $constraints = array();
+    $constraints = [];
     foreach ($this->definition->getConstraints() as $name => $options) {
       $constraints[] = $constraint_manager->create($name, $options);
     }
diff --git a/core/lib/Drupal/Core/TypedData/TypedDataManager.php b/core/lib/Drupal/Core/TypedData/TypedDataManager.php
index b1c295d00e48a11f7a350e4a8d35014f4a76f530..8c4f265ebdb4dfdb9a242dbab6fa2d29e2af44f0 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataManager.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataManager.php
@@ -40,7 +40,7 @@ class TypedDataManager extends DefaultPluginManager implements TypedDataManagerI
    *
    * @var array
    */
-  protected $prototypes = array();
+  protected $prototypes = [];
 
   /**
    * The class resolver.
@@ -73,7 +73,7 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
   /**
    * {@inheritdoc}
    */
-  public function createInstance($data_type, array $configuration = array()) {
+  public function createInstance($data_type, array $configuration = []) {
     $data_definition = $configuration['data_definition'];
     $type_definition = $this->getDefinition($data_type);
 
@@ -97,11 +97,11 @@ public function createInstance($data_type, array $configuration = array()) {
    * {@inheritdoc}
    */
   public function create(DataDefinitionInterface $definition, $value = NULL, $name = NULL, $parent = NULL) {
-    $typed_data = $this->createInstance($definition->getDataType(), array(
+    $typed_data = $this->createInstance($definition->getDataType(), [
       'data_definition' => $definition,
       'name' => $name,
       'parent' => $parent,
-    ));
+    ]);
     if (isset($value)) {
       $typed_data->setValue($value, FALSE);
     }
@@ -239,12 +239,12 @@ public function getValidationConstraintManager() {
    * {@inheritdoc}
    */
   public function getDefaultConstraints(DataDefinitionInterface $definition) {
-    $constraints = array();
+    $constraints = [];
     $type_definition = $this->getDefinition($definition->getDataType());
     // Auto-generate a constraint for data types implementing a primitive
     // interface.
     if (is_subclass_of($type_definition['class'], '\Drupal\Core\TypedData\PrimitiveInterface')) {
-      $constraints['PrimitiveType'] = array();
+      $constraints['PrimitiveType'] = [];
     }
     // Add in constraints specified by the data type.
     if (isset($type_definition['constraints'])) {
@@ -252,11 +252,11 @@ public function getDefaultConstraints(DataDefinitionInterface $definition) {
     }
     // Add the NotNull constraint for required data.
     if ($definition->isRequired()) {
-      $constraints['NotNull'] = array();
+      $constraints['NotNull'] = [];
     }
     // Check if the class provides allowed values.
     if (is_subclass_of($definition->getClass(), 'Drupal\Core\TypedData\OptionsProviderInterface')) {
-      $constraints['AllowedValues'] = array();
+      $constraints['AllowedValues'] = [];
     }
     return $constraints;
   }
@@ -266,7 +266,7 @@ public function getDefaultConstraints(DataDefinitionInterface $definition) {
    */
   public function clearCachedDefinitions() {
     parent::clearCachedDefinitions();
-    $this->prototypes = array();
+    $this->prototypes = [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php b/core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php
index 20a4a76af282b5a9a7ea975cbb455a0d48b49cb8..29723c6fc195ef59b377afb13410f8113f6432c0 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php
@@ -34,7 +34,7 @@ interface TypedDataManagerInterface extends PluginManagerInterface, CachedDiscov
    *
    * @see \Drupal\Core\TypedData\TypedDataManager::create()
    */
-  public function createInstance($data_type, array $configuration = array());
+  public function createInstance($data_type, array $configuration = []);
 
   /**
    * Creates a new typed data object instance.
diff --git a/core/lib/Drupal/Core/TypedData/Validation/ExecutionContext.php b/core/lib/Drupal/Core/TypedData/Validation/ExecutionContext.php
index a20fa527a5beda42b1eda3a7c51493385fcf4bbe..c72cd55d402971d11e11d052245a9897a13fc58d 100644
--- a/core/lib/Drupal/Core/TypedData/Validation/ExecutionContext.php
+++ b/core/lib/Drupal/Core/TypedData/Validation/ExecutionContext.php
@@ -96,14 +96,14 @@ class ExecutionContext implements ExecutionContextInterface {
    *
    * @var array
    */
-  protected $validatedObjects = array();
+  protected $validatedObjects = [];
 
   /**
    * Stores which class constraint has been validated for which object.
    *
    * @var array
    */
-  protected $validatedConstraints = array();
+  protected $validatedConstraints = [];
 
   /**
    * Creates a new ExecutionContext.
@@ -155,7 +155,7 @@ public function setConstraint(Constraint $constraint) {
   /**
    * {@inheritdoc}
    */
-  public function addViolation($message, array $parameters = array(), $invalidValue = NULL, $plural = NULL, $code = NULL) {
+  public function addViolation($message, array $parameters = [], $invalidValue = NULL, $plural = NULL, $code = NULL) {
     // The parameters $invalidValue and following are ignored by the new
     // API, as they are not present in the new interface anymore.
     // You should use buildViolation() instead.
@@ -169,7 +169,7 @@ public function addViolation($message, array $parameters = array(), $invalidValu
   /**
    * {@inheritdoc}
    */
-  public function buildViolation($message, array $parameters = array()) {
+  public function buildViolation($message, array $parameters = []) {
     return new ConstraintViolationBuilder($this->violations, $this->constraint, $message, $parameters, $this->root, $this->propertyPath, $this->value, $this->translator, $this->translationDomain);
   }
 
@@ -246,7 +246,7 @@ public function getPropertyPath($sub_path = '') {
   /**
    * {@inheritdoc}
    */
-  public function addViolationAt($subPath, $message, array $parameters = array(), $invalidValue = NULL, $plural = NULL, $code = NULL) {
+  public function addViolationAt($subPath, $message, array $parameters = [], $invalidValue = NULL, $plural = NULL, $code = NULL) {
     throw new \LogicException('Legacy validator API is unsupported.');
   }
 
diff --git a/core/lib/Drupal/Core/TypedData/Validation/RecursiveContextualValidator.php b/core/lib/Drupal/Core/TypedData/Validation/RecursiveContextualValidator.php
index b765b051ec076b22a941fe0e8d3e48c2c220b497..a5d453ae58e5a6b8bf3b879e0bf5ddb7f78f6496 100644
--- a/core/lib/Drupal/Core/TypedData/Validation/RecursiveContextualValidator.php
+++ b/core/lib/Drupal/Core/TypedData/Validation/RecursiveContextualValidator.php
@@ -93,7 +93,7 @@ public function validate($data, $constraints = NULL, $groups = NULL, $is_root_ca
     // You can pass a single constraint or an array of constraints.
     // Make sure to deal with an array in the rest of the code.
     if (isset($constraints) && !is_array($constraints)) {
-      $constraints = array($constraints);
+      $constraints = [$constraints];
     }
 
     $this->validateNode($data, $constraints, $is_root_call);
diff --git a/core/lib/Drupal/Core/Update/UpdateRegistry.php b/core/lib/Drupal/Core/Update/UpdateRegistry.php
index 4d4bbf5af6432b58e3bab519bd6ae7b64444c5b9..bb0b91f5adea9f94622bf1d3436678b754f982e0 100644
--- a/core/lib/Drupal/Core/Update/UpdateRegistry.php
+++ b/core/lib/Drupal/Core/Update/UpdateRegistry.php
@@ -187,7 +187,7 @@ public function getPendingUpdateInformation() {
       list($module, $update) = explode("_{$this->updateType}_", $function);
       // The description for an update comes from its Doxygen.
       $func = new \ReflectionFunction($function);
-      $description = trim(str_replace(array("\n", '*', '/'), '', $func->getDocComment()), ' ');
+      $description = trim(str_replace(["\n", '*', '/'], '', $func->getDocComment()), ' ');
       $ret[$module]['pending'][$update] = $description;
       if (!isset($ret[$module]['start'])) {
         $ret[$module]['start'] = $update;
diff --git a/core/lib/Drupal/Core/Updater/Module.php b/core/lib/Drupal/Core/Updater/Module.php
index be0d34be371496b491f5d8915967f56d1240108e..0a244b46bc15ab4fa8ccb2ce608ba10e9cd96413 100644
--- a/core/lib/Drupal/Core/Updater/Module.php
+++ b/core/lib/Drupal/Core/Updater/Module.php
@@ -49,7 +49,7 @@ public static function getRootDirectoryRelativePath() {
   public function isInstalled() {
     // Check if the module exists in the file system, regardless of whether it
     // is enabled or not.
-    $modules = \Drupal::state()->get('system.module.files', array());
+    $modules = \Drupal::state()->get('system.module.files', []);
     return isset($modules[$this->name]);
   }
 
@@ -84,12 +84,12 @@ public function getSchemaUpdates() {
     require_once DRUPAL_ROOT . '/core/includes/update.inc';
 
     if (!self::canUpdate($this->name)) {
-      return array();
+      return [];
     }
     module_load_include('install', $this->name);
 
     if (!$updates = drupal_get_schema_versions($this->name)) {
-      return array();
+      return [];
     }
     $modules_with_updates = update_get_update_list();
     if ($updates = $modules_with_updates[$this->name]) {
@@ -97,7 +97,7 @@ public function getSchemaUpdates() {
         return $updates['pending'];
       }
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Updater/Theme.php b/core/lib/Drupal/Core/Updater/Theme.php
index 48f68c75673b3539998a0080b80da18b02e07fda..d16af5738180d28ff1bd156ecf20ee9200a1d5f5 100644
--- a/core/lib/Drupal/Core/Updater/Theme.php
+++ b/core/lib/Drupal/Core/Updater/Theme.php
@@ -49,7 +49,7 @@ public static function getRootDirectoryRelativePath() {
   public function isInstalled() {
     // Check if the theme exists in the file system, regardless of whether it
     // is enabled or not.
-    $themes = \Drupal::state()->get('system.theme.files', array());
+    $themes = \Drupal::state()->get('system.theme.files', []);
     return isset($themes[$this->name]);
   }
 
diff --git a/core/lib/Drupal/Core/Updater/Updater.php b/core/lib/Drupal/Core/Updater/Updater.php
index 0381728e9b44afbc4f4c28c35f86a2bb9b2eae70..a1ba1031173987e3f67489cc599a8ec98ac35ca2 100644
--- a/core/lib/Drupal/Core/Updater/Updater.php
+++ b/core/lib/Drupal/Core/Updater/Updater.php
@@ -86,7 +86,7 @@ public static function getUpdaterFromDirectory($directory) {
     $updaters = drupal_get_updaters();
     foreach ($updaters as $updater) {
       $class = $updater['class'];
-      if (call_user_func(array($class, 'canUpdateDirectory'), $directory)) {
+      if (call_user_func([$class, 'canUpdateDirectory'], $directory)) {
         return $class;
       }
     }
@@ -174,7 +174,7 @@ public static function getProjectTitle($directory) {
     $info_file = self::findInfoFile($directory);
     $info = \Drupal::service('info_parser')->parse($info_file);
     if (empty($info)) {
-      throw new UpdaterException(t('Unable to parse info file: %info_file.', array('%info_file' => $info_file)));
+      throw new UpdaterException(t('Unable to parse info file: %info_file.', ['%info_file' => $info_file]));
     }
     return $info['name'];
   }
@@ -188,12 +188,12 @@ public static function getProjectTitle($directory) {
    * @return array
    *   An array of configuration parameters for an update or install operation.
    */
-  protected function getInstallArgs($overrides = array()) {
-    $args = array(
+  protected function getInstallArgs($overrides = []) {
+    $args = [
       'make_backup' => FALSE,
       'install_dir' => $this->getInstallDirectory(),
       'backup_dir'  => $this->getBackupDir(),
-    );
+    ];
     return array_merge($args, $overrides);
   }
 
@@ -212,7 +212,7 @@ protected function getInstallArgs($overrides = array()) {
    * @throws \Drupal\Core\Updater\UpdaterException
    * @throws \Drupal\Core\Updater\UpdaterFileTransferException
    */
-  public function update(&$filetransfer, $overrides = array()) {
+  public function update(&$filetransfer, $overrides = []) {
     try {
       // Establish arguments with possible overrides.
       $args = $this->getInstallArgs($overrides);
@@ -249,7 +249,7 @@ public function update(&$filetransfer, $overrides = array()) {
       return $this->postUpdateTasks();
     }
     catch (FileTransferException $e) {
-      throw new UpdaterFileTransferException(t('File Transfer failed, reason: @reason', array('@reason' => strtr($e->getMessage(), $e->arguments))));
+      throw new UpdaterFileTransferException(t('File Transfer failed, reason: @reason', ['@reason' => strtr($e->getMessage(), $e->arguments)]));
     }
   }
 
@@ -266,7 +266,7 @@ public function update(&$filetransfer, $overrides = array()) {
    *
    * @throws \Drupal\Core\Updater\UpdaterFileTransferException
    */
-  public function install(&$filetransfer, $overrides = array()) {
+  public function install(&$filetransfer, $overrides = []) {
     try {
       // Establish arguments with possible overrides.
       $args = $this->getInstallArgs($overrides);
@@ -287,7 +287,7 @@ public function install(&$filetransfer, $overrides = array()) {
       return $this->postInstallTasks();
     }
     catch (FileTransferException $e) {
-      throw new UpdaterFileTransferException(t('File Transfer failed, reason: @reason', array('@reason' => strtr($e->getMessage(), $e->arguments))));
+      throw new UpdaterFileTransferException(t('File Transfer failed, reason: @reason', ['@reason' => strtr($e->getMessage(), $e->arguments)]));
     }
   }
 
@@ -326,7 +326,7 @@ public function prepareInstallDirectory(&$filetransfer, $directory) {
           }
           catch (FileTransferException $e) {
             $message = t($e->getMessage(), $e->arguments);
-            $throw_message = t('Unable to create %directory due to the following: %reason', array('%directory' => $directory, '%reason' => $message));
+            $throw_message = t('Unable to create %directory due to the following: %reason', ['%directory' => $directory, '%reason' => $message]);
             throw new UpdaterException($throw_message);
           }
         }
@@ -395,7 +395,7 @@ public function postInstall() {
    *   Links which provide actions to take after the install is finished.
    */
   public function postInstallTasks() {
-    return array();
+    return [];
   }
 
   /**
@@ -405,7 +405,7 @@ public function postInstallTasks() {
    *   Links which provide actions to take after the update is finished.
    */
   public function postUpdateTasks() {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Url.php b/core/lib/Drupal/Core/Url.php
index ccc62fe750ba392dd850f819d2c90ee847a06c9e..76dc46c77b1e31f3db09c55cbcfffcb12676c303 100644
--- a/core/lib/Drupal/Core/Url.php
+++ b/core/lib/Drupal/Core/Url.php
@@ -51,7 +51,7 @@ class Url {
    *
    * @var array
    */
-  protected $routeParameters = array();
+  protected $routeParameters = [];
 
   /**
    * The URL options.
@@ -60,7 +60,7 @@ class Url {
    *
    * @var array
    */
-  protected $options = array();
+  protected $options = [];
 
   /**
    * Indicates whether this object contains an external URL.
@@ -112,7 +112,7 @@ class Url {
    * @todo Update this documentation for non-routed URIs in
    *   https://www.drupal.org/node/2346787
    */
-  public function __construct($route_name, $route_parameters = array(), $options = array()) {
+  public function __construct($route_name, $route_parameters = [], $options = []) {
     $this->routeName = $route_name;
     $this->routeParameters = $route_parameters;
     $this->options = $options;
@@ -138,7 +138,7 @@ public function __construct($route_name, $route_parameters = array(), $options =
    * @see \Drupal\Core\Url::fromUserInput()
    * @see \Drupal\Core\Url::fromUri()
    */
-  public static function fromRoute($route_name, $route_parameters = array(), $options = array()) {
+  public static function fromRoute($route_name, $route_parameters = [], $options = []) {
     return new static($route_name, $route_parameters, $options);
   }
 
@@ -310,7 +310,7 @@ public static function fromUri($uri, $options = []) {
       $url = static::fromRouteUri($uri_parts, $uri_options, $uri);
     }
     else {
-      $url = new static($uri, array(), $options);
+      $url = new static($uri, [], $options);
       if ($uri_parts['scheme'] !== 'base') {
         $url->external = TRUE;
         $url->setOption('external', TRUE);
@@ -494,7 +494,7 @@ protected function setUnrouted() {
     $this->uri = $this->routeName;
     // Set empty route name and parameters.
     $this->routeName = NULL;
-    $this->routeParameters = array();
+    $this->routeParameters = [];
     return $this;
   }
 
diff --git a/core/lib/Drupal/Core/Utility/Error.php b/core/lib/Drupal/Core/Utility/Error.php
index 6105a59021cbc06388b8cf7e6a382ec95351bddc..eb452c24268fe7f7852eb670da3e2498d805167d 100644
--- a/core/lib/Drupal/Core/Utility/Error.php
+++ b/core/lib/Drupal/Core/Utility/Error.php
@@ -23,7 +23,7 @@ class Error {
    *
    * @var array
    */
-  protected static $blacklistFunctions = array('debug', '_drupal_error_handler', '_drupal_exception_handler');
+  protected static $blacklistFunctions = ['debug', '_drupal_error_handler', '_drupal_exception_handler'];
 
   /**
    * Decodes an exception and retrieves the correct caller.
@@ -39,7 +39,7 @@ public static function decodeException($exception) {
 
     $backtrace = $exception->getTrace();
     // Add the line throwing the exception to the backtrace.
-    array_unshift($backtrace, array('line' => $exception->getLine(), 'file' => $exception->getFile()));
+    array_unshift($backtrace, ['line' => $exception->getLine(), 'file' => $exception->getFile()]);
 
     // For PDOException errors, we try to return the initial caller,
     // skipping internal functions of the database layer.
@@ -47,7 +47,7 @@ public static function decodeException($exception) {
       // The first element in the stack is the call, the second element gives us
       // the caller. We skip calls that occurred in one of the classes of the
       // database layer or in one of its global functions.
-      $db_functions = array('db_query', 'db_query_range');
+      $db_functions = ['db_query', 'db_query_range'];
       while (!empty($backtrace[1]) && ($caller = $backtrace[1]) &&
         ((isset($caller['class']) && (strpos($caller['class'], 'Query') !== FALSE || strpos($caller['class'], 'Database') !== FALSE || strpos($caller['class'], 'PDO') !== FALSE)) ||
           in_array($caller['function'], $db_functions))) {
@@ -61,7 +61,7 @@ public static function decodeException($exception) {
 
     $caller = static::getLastCaller($backtrace);
 
-    return array(
+    return [
       '%type' => get_class($exception),
       // The standard PHP exception handler considers that the exception message
       // is plain-text. We mimic this behavior here.
@@ -72,7 +72,7 @@ public static function decodeException($exception) {
       'severity_level' => static::ERROR,
       'backtrace' => $backtrace,
       '@backtrace_string' => $exception->getTraceAsString(),
-    );
+    ];
   }
 
   /**
@@ -152,7 +152,7 @@ public static function formatBacktrace(array $backtrace) {
     $return = '';
 
     foreach ($backtrace as $trace) {
-      $call = array('function' => '', 'args' => array());
+      $call = ['function' => '', 'args' => []];
 
       if (isset($trace['class'])) {
         $call['function'] = $trace['class'] . $trace['type'] . $trace['function'];
diff --git a/core/lib/Drupal/Core/Utility/LinkGenerator.php b/core/lib/Drupal/Core/Utility/LinkGenerator.php
index 1dad742a822066d6fd5e6f557f867f7284b031c8..8367556445e304a03e47df0bb450b099f68db330 100644
--- a/core/lib/Drupal/Core/Utility/LinkGenerator.php
+++ b/core/lib/Drupal/Core/Utility/LinkGenerator.php
@@ -90,20 +90,20 @@ public function generate($text, Url $url) {
     }
 
     // Start building a structured representation of our link to be altered later.
-    $variables = array(
+    $variables = [
       'text' => $text,
       'url' => $url,
       'options' => $url->getOptions(),
-    );
+    ];
 
     // Merge in default options.
-    $variables['options'] += array(
-      'attributes' => array(),
-      'query' => array(),
+    $variables['options'] += [
+      'attributes' => [],
+      'query' => [],
       'language' => NULL,
       'set_active_class' => FALSE,
       'absolute' => FALSE,
-    );
+    ];
 
     // Add a hreflang attribute if we know the language of this link's url and
     // hreflang has not already been set.
@@ -150,7 +150,7 @@ public function generate($text, Url $url) {
 
     // Move attributes out of options since generateFromRoute() doesn't need
     // them. Make sure the "href" comes first for testing purposes.
-    $attributes = array('href' => '') + $variables['options']['attributes'];
+    $attributes = ['href' => ''] + $variables['options']['attributes'];
     unset($variables['options']['attributes']);
     $url->setOptions($variables['options']);
 
diff --git a/core/lib/Drupal/Core/Utility/ProjectInfo.php b/core/lib/Drupal/Core/Utility/ProjectInfo.php
index 24043d3b438d6be5e6e84e5a19b8fe554258fb86..4a4d0c0a65719ca260cc0466c29cdb58133ea442 100644
--- a/core/lib/Drupal/Core/Utility/ProjectInfo.php
+++ b/core/lib/Drupal/Core/Utility/ProjectInfo.php
@@ -39,7 +39,7 @@ class ProjectInfo {
    *   (optional) Array of additional elements to be collected from the .info.yml
    *   file. Defaults to array().
    */
-  function processInfoList(array &$projects, array $list, $project_type, $status, array $additional_whitelist = array()) {
+  function processInfoList(array &$projects, array $list, $project_type, $status, array $additional_whitelist = []) {
     foreach ($list as $file) {
       // Just projects with a matching status should be listed.
       if ($file->status != $status) {
@@ -107,16 +107,16 @@ function processInfoList(array &$projects, array $list, $project_type, $status,
       if (!isset($projects[$project_name])) {
         // Only process this if we haven't done this project, since a single
         // project can have multiple modules or themes.
-        $projects[$project_name] = array(
+        $projects[$project_name] = [
           'name' => $project_name,
           // Only save attributes from the .info.yml file we care about so we do
           // not bloat our RAM usage needlessly.
           'info' => $this->filterProjectInfo($file->info, $additional_whitelist),
           'datestamp' => $file->info['datestamp'],
-          'includes' => array($file->getName() => $file->info['name']),
+          'includes' => [$file->getName() => $file->info['name']],
           'project_type' => $project_display_type,
           'project_status' => $status,
-        );
+        ];
       }
       elseif ($projects[$project_name]['project_type'] == $project_display_type) {
         // Only add the file we're processing to the 'includes' array for this
@@ -174,8 +174,8 @@ function getProjectName(Extension $file) {
    *
    * @see \Drupal\Core\Utility\ProjectInfo::processInfoList()
    */
-  function filterProjectInfo($info, $additional_whitelist = array()) {
-    $whitelist = array(
+  function filterProjectInfo($info, $additional_whitelist = []) {
+    $whitelist = [
       '_info_file_ctime',
       'datestamp',
       'major',
@@ -184,7 +184,7 @@ function filterProjectInfo($info, $additional_whitelist = array()) {
       'project',
       'project status url',
       'version',
-    );
+    ];
     $whitelist = array_merge($whitelist, $additional_whitelist);
     return array_intersect_key($info, array_combine($whitelist, $whitelist));
   }
diff --git a/core/lib/Drupal/Core/Utility/ThemeRegistry.php b/core/lib/Drupal/Core/Utility/ThemeRegistry.php
index 8dbf42e242dfa2a9ce013a5adaeb4ceb3aac867e..99b970ca9d08d3b62d357aef94f11742bb65bdcf 100644
--- a/core/lib/Drupal/Core/Utility/ThemeRegistry.php
+++ b/core/lib/Drupal/Core/Utility/ThemeRegistry.php
@@ -46,7 +46,7 @@ class ThemeRegistry extends CacheCollector implements DestructableInterface {
    * @param bool $modules_loaded
    *   Whether all modules have already been loaded.
    */
-  function __construct($cid, CacheBackendInterface $cache, LockBackendInterface $lock, $tags = array(), $modules_loaded = FALSE) {
+  function __construct($cid, CacheBackendInterface $cache, LockBackendInterface $lock, $tags = [], $modules_loaded = FALSE) {
     $this->cid = $cid;
     $this->cache = $cache;
     $this->lock = $lock;
@@ -136,7 +136,7 @@ protected function updateCache($lock = TRUE) {
       return;
     }
     // @todo: Is the custom implementation necessary?
-    $data = array();
+    $data = [];
     foreach ($this->keysToPersist as $offset => $persist) {
       if ($persist) {
         $data[$offset] = $this->storage[$offset];
diff --git a/core/lib/Drupal/Core/Utility/Token.php b/core/lib/Drupal/Core/Utility/Token.php
index 53432e8cc1ed8023106c9655396e9fbfa273578d..2a7fd4a753e88c69cf4d6e446d49b69ef3395006 100644
--- a/core/lib/Drupal/Core/Utility/Token.php
+++ b/core/lib/Drupal/Core/Utility/Token.php
@@ -182,7 +182,7 @@ public function __construct(ModuleHandlerInterface $module_handler, CacheBackend
    *   otherwise for example the result can be put into #markup, in which case
    *   it would be sanitized by Xss::filterAdmin().
    */
-  public function replace($text, array $data = array(), array $options = array(), BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function replace($text, array $data = [], array $options = [], BubbleableMetadata $bubbleable_metadata = NULL) {
     $text_tokens = $this->scan($text);
     if (empty($text_tokens)) {
       return $text;
@@ -191,7 +191,7 @@ public function replace($text, array $data = array(), array $options = array(),
     $bubbleable_metadata_is_passed_in = (bool) $bubbleable_metadata;
     $bubbleable_metadata = $bubbleable_metadata ?: new BubbleableMetadata();
 
-    $replacements = array();
+    $replacements = [];
     foreach ($text_tokens as $type => $tokens) {
       $replacements += $this->generate($type, $tokens, $data, $options, $bubbleable_metadata);
       if (!empty($options['clear'])) {
@@ -251,7 +251,7 @@ public function scan($text) {
     // Iterate through the matches, building an associative array containing
     // $tokens grouped by $types, pointing to the version of the token found in
     // the source text. For example, $results['node']['title'] = '[node:title]';
-    $results = array();
+    $results = [];
     for ($i = 0; $i < count($tokens); $i++) {
       $results[$types[$i]][$tokens[$i]] = $matches[0][$i];
     }
@@ -304,12 +304,12 @@ public function generate($type, array $tokens, array $data, array $options, Bubb
     $replacements = $this->moduleHandler->invokeAll('tokens', [$type, $tokens, $data, $options, $bubbleable_metadata]);
 
     // Allow other modules to alter the replacements.
-    $context = array(
+    $context = [
       'type' => $type,
       'tokens' => $tokens,
       'data' => $data,
       'options' => $options,
-    );
+    ];
     $this->moduleHandler->alter('tokens', $replacements, $context, $bubbleable_metadata);
 
     return $replacements;
@@ -343,7 +343,7 @@ public function generate($type, array $tokens, array $data, array $options, Bubb
    *   stripped from the key.
    */
   public function findWithPrefix(array $tokens, $prefix, $delimiter = ':') {
-    $results = array();
+    $results = [];
     foreach ($tokens as $token => $raw) {
       $parts = explode($delimiter, $token, 2);
       if (count($parts) == 2 && $parts[0] == $prefix) {
@@ -376,9 +376,9 @@ public function getInfo() {
       else {
         $this->tokenInfo = $this->moduleHandler->invokeAll('token_info');
         $this->moduleHandler->alter('token_info', $this->tokenInfo);
-        $this->cache->set($cache_id, $this->tokenInfo, CacheBackendInterface::CACHE_PERMANENT, array(
+        $this->cache->set($cache_id, $this->tokenInfo, CacheBackendInterface::CACHE_PERMANENT, [
           static::TOKEN_INFO_CACHE_TAG,
-        ));
+        ]);
       }
     }
 
diff --git a/core/lib/Drupal/Core/Utility/UnroutedUrlAssemblerInterface.php b/core/lib/Drupal/Core/Utility/UnroutedUrlAssemblerInterface.php
index e0c07943371ba462860415b9050af30d54864bdd..4422055b0f646bcbdd06fd0071335f7ed4901891 100644
--- a/core/lib/Drupal/Core/Utility/UnroutedUrlAssemblerInterface.php
+++ b/core/lib/Drupal/Core/Utility/UnroutedUrlAssemblerInterface.php
@@ -52,6 +52,6 @@ interface UnroutedUrlAssemblerInterface {
    * @throws \InvalidArgumentException
    *   Thrown when the passed in path has no scheme.
    */
-  public function assemble($uri, array $options = array(), $collect_bubbleable_metadata = FALSE);
+  public function assemble($uri, array $options = [], $collect_bubbleable_metadata = FALSE);
 
 }
diff --git a/core/lib/Drupal/Core/Utility/token.api.php b/core/lib/Drupal/Core/Utility/token.api.php
index 56d8f3a5fb8a58e29095eacd7d4cbe295d764bbf..54a5226ffbe6fcd3999f4e41389912c9df19905d 100644
--- a/core/lib/Drupal/Core/Utility/token.api.php
+++ b/core/lib/Drupal/Core/Utility/token.api.php
@@ -74,7 +74,7 @@
 function hook_tokens($type, $tokens, array $data, array $options, \Drupal\Core\Render\BubbleableMetadata $bubbleable_metadata) {
   $token_service = \Drupal::token();
 
-  $url_options = array('absolute' => TRUE);
+  $url_options = ['absolute' => TRUE];
   if (isset($options['langcode'])) {
     $url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
     $langcode = $options['langcode'];
@@ -82,7 +82,7 @@ function hook_tokens($type, $tokens, array $data, array $options, \Drupal\Core\R
   else {
     $langcode = NULL;
   }
-  $replacements = array();
+  $replacements = [];
 
   if ($type == 'node' && !empty($data['node'])) {
     /** @var \Drupal\node\NodeInterface $node */
@@ -117,11 +117,11 @@ function hook_tokens($type, $tokens, array $data, array $options, \Drupal\Core\R
     }
 
     if ($author_tokens = $token_service->findWithPrefix($tokens, 'author')) {
-      $replacements = $token_service->generate('user', $author_tokens, array('user' => $node->getOwner()), $options, $bubbleable_metadata);
+      $replacements = $token_service->generate('user', $author_tokens, ['user' => $node->getOwner()], $options, $bubbleable_metadata);
     }
 
     if ($created_tokens = $token_service->findWithPrefix($tokens, 'created')) {
-      $replacements = $token_service->generate('date', $created_tokens, array('date' => $node->getCreatedTime()), $options, $bubbleable_metadata);
+      $replacements = $token_service->generate('date', $created_tokens, ['date' => $node->getCreatedTime()], $options, $bubbleable_metadata);
     }
   }
 
@@ -219,39 +219,39 @@ function hook_tokens_alter(array &$replacements, array $context, \Drupal\Core\Re
  * @see hook_tokens()
  */
 function hook_token_info() {
-  $type = array(
+  $type = [
     'name' => t('Nodes'),
     'description' => t('Tokens related to individual nodes.'),
     'needs-data' => 'node',
-  );
+  ];
 
   // Core tokens for nodes.
-  $node['nid'] = array(
+  $node['nid'] = [
     'name' => t("Node ID"),
     'description' => t("The unique ID of the node."),
-  );
-  $node['title'] = array(
+  ];
+  $node['title'] = [
     'name' => t("Title"),
-  );
-  $node['edit-url'] = array(
+  ];
+  $node['edit-url'] = [
     'name' => t("Edit URL"),
     'description' => t("The URL of the node's edit page."),
-  );
+  ];
 
   // Chained tokens for nodes.
-  $node['created'] = array(
+  $node['created'] = [
     'name' => t("Date created"),
     'type' => 'date',
-  );
-  $node['author'] = array(
+  ];
+  $node['author'] = [
     'name' => t("Author"),
     'type' => 'user',
-  );
+  ];
 
-  return array(
-    'types' => array('node' => $type),
-    'tokens' => array('node' => $node),
-  );
+  return [
+    'types' => ['node' => $type],
+    'tokens' => ['node' => $node],
+  ];
 }
 
 /**
@@ -264,21 +264,21 @@ function hook_token_info() {
  */
 function hook_token_info_alter(&$data) {
   // Modify description of node tokens for our site.
-  $data['tokens']['node']['nid'] = array(
+  $data['tokens']['node']['nid'] = [
     'name' => t("Node ID"),
     'description' => t("The unique ID of the article."),
-  );
-  $data['tokens']['node']['title'] = array(
+  ];
+  $data['tokens']['node']['title'] = [
     'name' => t("Title"),
     'description' => t("The title of the article."),
-  );
+  ];
 
   // Chained tokens for nodes.
-  $data['tokens']['node']['created'] = array(
+  $data['tokens']['node']['created'] = [
     'name' => t("Date created"),
     'description' => t("The date the article was posted."),
     'type' => 'date',
-  );
+  ];
 }
 
 /**
diff --git a/core/lib/Drupal/Core/Validation/ConstraintManager.php b/core/lib/Drupal/Core/Validation/ConstraintManager.php
index 23bd7eb165d5f949cd6bacda63fa4732403b9abc..a2bd604c0a158098f4c9d7b612c02909488213e4 100644
--- a/core/lib/Drupal/Core/Validation/ConstraintManager.php
+++ b/core/lib/Drupal/Core/Validation/ConstraintManager.php
@@ -74,7 +74,7 @@ public function create($name, $options) {
       // Plugins need an array as configuration, so make sure we have one.
       // The constraint classes support passing the options as part of the
       // 'value' key also.
-      $options = isset($options) ? array('value' => $options) : array();
+      $options = isset($options) ? ['value' => $options] : [];
     }
     return $this->createInstance($name, $options);
   }
@@ -85,26 +85,26 @@ public function create($name, $options) {
    * @see ConstraintManager::__construct()
    */
   public function registerDefinitions() {
-    $this->getDiscovery()->setDefinition('Callback', array(
+    $this->getDiscovery()->setDefinition('Callback', [
       'label' => new TranslatableMarkup('Callback'),
       'class' => '\Symfony\Component\Validator\Constraints\Callback',
       'type' => FALSE,
-    ));
-    $this->getDiscovery()->setDefinition('Blank', array(
+    ]);
+    $this->getDiscovery()->setDefinition('Blank', [
       'label' => new TranslatableMarkup('Blank'),
       'class' => '\Symfony\Component\Validator\Constraints\Blank',
       'type' => FALSE,
-    ));
-    $this->getDiscovery()->setDefinition('NotBlank', array(
+    ]);
+    $this->getDiscovery()->setDefinition('NotBlank', [
       'label' => new TranslatableMarkup('Not blank'),
       'class' => '\Symfony\Component\Validator\Constraints\NotBlank',
       'type' => FALSE,
-    ));
-    $this->getDiscovery()->setDefinition('Email', array(
+    ]);
+    $this->getDiscovery()->setDefinition('Email', [
       'label' => new TranslatableMarkup('Email'),
       'class' => '\Drupal\Core\Validation\Plugin\Validation\Constraint\EmailConstraint',
-      'type' => array('string'),
-    ));
+      'type' => ['string'],
+    ]);
   }
 
   /**
@@ -113,7 +113,7 @@ public function registerDefinitions() {
   public function processDefinition(&$definition, $plugin_id) {
     // Make sure 'type' is set and either an array or FALSE.
     if ($definition['type'] !== FALSE && !is_array($definition['type'])) {
-      $definition['type'] = array($definition['type']);
+      $definition['type'] = [$definition['type']];
     }
   }
 
@@ -128,7 +128,7 @@ public function processDefinition(&$definition, $plugin_id) {
    *   keyed by constraint name (plugin ID).
    */
   public function getDefinitionsByType($type) {
-    $definitions = array();
+    $definitions = [];
     foreach ($this->getDefinitions() as $plugin_id => $definition) {
       if ($definition['type'] === FALSE || in_array($type, $definition['type'])) {
         $definitions[$plugin_id] = $definition;
diff --git a/core/lib/Drupal/Core/Validation/DrupalTranslator.php b/core/lib/Drupal/Core/Validation/DrupalTranslator.php
index f00df20b81a81cd0f42374aca2237cab9c761d15..505decaff2ca8325d99305f94b7d90462c492d93 100644
--- a/core/lib/Drupal/Core/Validation/DrupalTranslator.php
+++ b/core/lib/Drupal/Core/Validation/DrupalTranslator.php
@@ -22,7 +22,7 @@ class DrupalTranslator implements TranslatorInterface {
   /**
    * {@inheritdoc}
    */
-  public function trans($id, array $parameters = array(), $domain = NULL, $locale = NULL) {
+  public function trans($id, array $parameters = [], $domain = NULL, $locale = NULL) {
     // If a TranslatableMarkup object is passed in as $id, return it since the
     // message has already been translated.
     return $id instanceof TranslatableMarkup ? $id : t($id, $this->processParameters($parameters), $this->getOptions($domain, $locale));
@@ -31,7 +31,7 @@ public function trans($id, array $parameters = array(), $domain = NULL, $locale
   /**
    * {@inheritdoc}
    */
-  public function transChoice($id, $number, array $parameters = array(), $domain = NULL, $locale = NULL) {
+  public function transChoice($id, $number, array $parameters = [], $domain = NULL, $locale = NULL) {
     // Violation messages can separated singular and plural versions by "|".
     $ids = explode('|', $id);
 
@@ -70,7 +70,7 @@ public function getLocale() {
    * Processes the parameters array for use with t().
    */
   protected function processParameters(array $parameters) {
-    $return = array();
+    $return = [];
     foreach ($parameters as $key => $value) {
       // We allow the values in the parameters to be safe string objects. This
       // can be useful when we want to use parameter values that are
@@ -101,7 +101,7 @@ protected function getOptions($domain = NULL, $locale = NULL) {
     // We do not support domains, so we ignore this parameter.
     // If locale is left NULL, t() will default to the interface language.
     $locale = isset($locale) ? $locale : $this->locale;
-    return array('langcode' => $locale);
+    return ['langcode' => $locale];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/ComplexDataConstraint.php b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/ComplexDataConstraint.php
index 5e7d0c7ebc06e8add5d639fda452831c5c8224dd..a020cdc3c27a94e3325d68aa98ad9cc6ac4e74c9 100644
--- a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/ComplexDataConstraint.php
+++ b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/ComplexDataConstraint.php
@@ -29,7 +29,7 @@ class ComplexDataConstraint extends Constraint {
   public function __construct($options = NULL) {
     // Allow skipping the 'properties' key in the options.
     if (is_array($options) && !array_key_exists('properties', $options)) {
-      $options = array('properties' => $options);
+      $options = ['properties' => $options];
     }
     parent::__construct($options);
     $constraint_manager = \Drupal::service('validation.constraint');
@@ -55,7 +55,7 @@ public function getDefaultOption() {
    * {@inheritdoc}
    */
   public function getRequiredOptions() {
-    return array('properties');
+    return ['properties'];
   }
 
 }
diff --git a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
index 5829e396ec09b34bd57bc5dfead9d738750d754f..f71e2e11420391ab229b908e388d4b006399998c 100644
--- a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
+++ b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
@@ -72,9 +72,9 @@ public function validate($value, Constraint $constraint) {
 
     if (!$valid) {
       // @todo: Provide a good violation message for each problem.
-      $this->context->addViolation($constraint->message, array(
+      $this->context->addViolation($constraint->message, [
         '%value' => is_object($value) ? get_class($value) : (is_array($value) ? 'Array' : (string) $value)
-      ));
+      ]);
     }
   }
 
diff --git a/core/modules/action/action.module b/core/modules/action/action.module
index 7461302d17a61e6c72966084227de7414868221b..5004a84b115e8db6ed616f778e72f21726ab4f72 100644
--- a/core/modules/action/action.module
+++ b/core/modules/action/action.module
@@ -15,13 +15,13 @@ function action_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.action':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Actions module provides tasks that can be executed by the site such as unpublishing content, sending email messages, or blocking a user. Other modules can trigger these actions when specific system events happen; for example, when new content is posted or when a user logs in. Modules can also provide additional actions. For more information, see the <a href=":documentation">online documentation for the Actions module</a>.', array(':documentation' => 'https://www.drupal.org/documentation/modules/action')) . '</p>';
+      $output .= '<p>' . t('The Actions module provides tasks that can be executed by the site such as unpublishing content, sending email messages, or blocking a user. Other modules can trigger these actions when specific system events happen; for example, when new content is posted or when a user logs in. Modules can also provide additional actions. For more information, see the <a href=":documentation">online documentation for the Actions module</a>.', [':documentation' => 'https://www.drupal.org/documentation/modules/action']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Using simple actions') . '</dt>';
-      $output .= '<dd>' . t('<em>Simple actions</em> do not require configuration and are listed automatically as available on the <a href=":actions">Actions page</a>.', array(':actions' => \Drupal::url('entity.action.collection'))) . '</dd>';
+      $output .= '<dd>' . t('<em>Simple actions</em> do not require configuration and are listed automatically as available on the <a href=":actions">Actions page</a>.', [':actions' => \Drupal::url('entity.action.collection')]) . '</dd>';
       $output .= '<dt>' . t('Creating and configuring advanced actions') . '</dt>';
-      $output .= '<dd>' . t('<em>Advanced actions</em> are user-created and have to be configured individually. Create an advanced action on the <a href=":actions">Actions page</a> by selecting an action type from the drop-down list. Then configure your action, for example by specifying the recipient of an automated email message.', array(':actions' => \Drupal::url('entity.action.collection'))) . '</dd>';
+      $output .= '<dd>' . t('<em>Advanced actions</em> are user-created and have to be configured individually. Create an advanced action on the <a href=":actions">Actions page</a> by selecting an action type from the drop-down list. Then configure your action, for example by specifying the recipient of an automated email message.', [':actions' => \Drupal::url('entity.action.collection')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
diff --git a/core/modules/action/action.views_execution.inc b/core/modules/action/action.views_execution.inc
index 5b4f71f8116bb020c78057266f1744ad43dbe77a..71b8eebe428b66df3541b05eb8abf37e7afb5d87 100644
--- a/core/modules/action/action.views_execution.inc
+++ b/core/modules/action/action.views_execution.inc
@@ -9,12 +9,12 @@
  * Implements hook_views_form_substitutions().
  */
 function action_views_form_substitutions() {
-  $select_all = array(
+  $select_all = [
     '#type' => 'checkbox',
     '#default_value' => FALSE,
-    '#attributes' => array('class' => array('action-table-select-all')),
-  );
-  return array(
+    '#attributes' => ['class' => ['action-table-select-all']],
+  ];
+  return [
     '<!--action-bulk-form-select-all-->' => drupal_render($select_all),
-  );
+  ];
 }
diff --git a/core/modules/action/src/ActionFormBase.php b/core/modules/action/src/ActionFormBase.php
index 7a5746a36ae7904b43c9bbe0a723f16b66d6acc4..3fafd035eeef4231cb0811844b87b814a6e09c80 100644
--- a/core/modules/action/src/ActionFormBase.php
+++ b/core/modules/action/src/ActionFormBase.php
@@ -58,32 +58,32 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function form(array $form, FormStateInterface $form_state) {
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label'),
       '#default_value' => $this->entity->label(),
       '#maxlength' => '255',
       '#description' => $this->t('A unique label for this advanced action. This label will be displayed in the interface of modules that integrate with actions.'),
-    );
+    ];
 
-    $form['id'] = array(
+    $form['id'] = [
       '#type' => 'machine_name',
       '#default_value' => $this->entity->id(),
       '#disabled' => !$this->entity->isNew(),
       '#maxlength' => 64,
       '#description' => $this->t('A unique name for this action. It must only contain lowercase letters, numbers and underscores.'),
-      '#machine_name' => array(
-        'exists' => array($this, 'exists'),
-      ),
-    );
-    $form['plugin'] = array(
+      '#machine_name' => [
+        'exists' => [$this, 'exists'],
+      ],
+    ];
+    $form['plugin'] = [
       '#type' => 'value',
       '#value' => $this->entity->get('plugin'),
-    );
-    $form['type'] = array(
+    ];
+    $form['type'] = [
       '#type' => 'value',
       '#value' => $this->entity->getType(),
-    );
+    ];
 
     if ($this->plugin instanceof PluginFormInterface) {
       $form += $this->plugin->buildConfigurationForm($form, $form_state);
diff --git a/core/modules/action/src/ActionListBuilder.php b/core/modules/action/src/ActionListBuilder.php
index 0a54cd65270916925fd89fb58ef2668c52bd8d41..2167d8e094014a26ebf6dddd5fae597de32fa8ed 100644
--- a/core/modules/action/src/ActionListBuilder.php
+++ b/core/modules/action/src/ActionListBuilder.php
@@ -86,10 +86,10 @@ public function buildRow(EntityInterface $entity) {
    * {@inheritdoc}
    */
   public function buildHeader() {
-    $header = array(
+    $header = [
       'type' => t('Action type'),
       'label' => t('Label'),
-    ) + parent::buildHeader();
+    ] + parent::buildHeader();
     return $header;
   }
 
@@ -97,7 +97,7 @@ public function buildHeader() {
    * {@inheritdoc}
    */
   public function getDefaultOperations(EntityInterface $entity) {
-    $operations = $entity->isConfigurable() ? parent::getDefaultOperations($entity) : array();
+    $operations = $entity->isConfigurable() ? parent::getDefaultOperations($entity) : [];
     if (isset($operations['edit'])) {
       $operations['edit']['title'] = t('Configure');
     }
diff --git a/core/modules/action/src/Form/ActionAdminManageForm.php b/core/modules/action/src/Form/ActionAdminManageForm.php
index de487557d1d02603a1b309f1404443276183e595..478e919be04567e51c1f2b075ef9266040a05fa4 100644
--- a/core/modules/action/src/Form/ActionAdminManageForm.php
+++ b/core/modules/action/src/Form/ActionAdminManageForm.php
@@ -50,33 +50,33 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $actions = array();
+    $actions = [];
     foreach ($this->manager->getDefinitions() as $id => $definition) {
       if (is_subclass_of($definition['class'], '\Drupal\Core\Plugin\PluginFormInterface')) {
         $key = Crypt::hashBase64($id);
         $actions[$key] = $definition['label'] . '...';
       }
     }
-    $form['parent'] = array(
+    $form['parent'] = [
       '#type' => 'details',
       '#title' => $this->t('Create an advanced action'),
-      '#attributes' => array('class' => array('container-inline')),
+      '#attributes' => ['class' => ['container-inline']],
       '#open' => TRUE,
-    );
-    $form['parent']['action'] = array(
+    ];
+    $form['parent']['action'] = [
       '#type' => 'select',
       '#title' => $this->t('Action'),
       '#title_display' => 'invisible',
       '#options' => $actions,
       '#empty_option' => $this->t('Choose an advanced action'),
-    );
-    $form['parent']['actions'] = array(
+    ];
+    $form['parent']['actions'] = [
       '#type' => 'actions'
-    );
-    $form['parent']['actions']['submit'] = array(
+    ];
+    $form['parent']['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Create'),
-    );
+    ];
     return $form;
   }
 
@@ -87,7 +87,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if ($form_state->getValue('action')) {
       $form_state->setRedirect(
         'action.admin_add',
-        array('action_id' => $form_state->getValue('action'))
+        ['action_id' => $form_state->getValue('action')]
       );
     }
   }
diff --git a/core/modules/action/src/Plugin/Action/EmailAction.php b/core/modules/action/src/Plugin/Action/EmailAction.php
index f23827975dc10f81af3d2d022f0cd274c6692c28..0f469ec6bfe075d15c696443e223f471b615aff1 100644
--- a/core/modules/action/src/Plugin/Action/EmailAction.php
+++ b/core/modules/action/src/Plugin/Action/EmailAction.php
@@ -129,7 +129,7 @@ public function execute($entity = NULL) {
     // If the recipient is a registered user with a language preference, use
     // the recipient's preferred language. Otherwise, use the system default
     // language.
-    $recipient_accounts = $this->storage->loadByProperties(array('mail' => $recipient));
+    $recipient_accounts = $this->storage->loadByProperties(['mail' => $recipient]);
     $recipient_account = reset($recipient_accounts);
     if ($recipient_account) {
       $langcode = $recipient_account->getPreferredLangcode();
@@ -137,13 +137,13 @@ public function execute($entity = NULL) {
     else {
       $langcode = $this->languageManager->getDefaultLanguage()->getId();
     }
-    $params = array('context' => $this->configuration);
+    $params = ['context' => $this->configuration];
 
     if ($this->mailManager->mail('system', 'action_send_email', $recipient, $langcode, $params)) {
-      $this->logger->notice('Sent email to %recipient', array('%recipient' => $recipient));
+      $this->logger->notice('Sent email to %recipient', ['%recipient' => $recipient]);
     }
     else {
-      $this->logger->error('Unable to send email to %recipient', array('%recipient' => $recipient));
+      $this->logger->error('Unable to send email to %recipient', ['%recipient' => $recipient]);
     }
   }
 
@@ -151,39 +151,39 @@ public function execute($entity = NULL) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'recipient' => '',
       'subject' => '',
       'message' => '',
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['recipient'] = array(
+    $form['recipient'] = [
       '#type' => 'textfield',
       '#title' => t('Recipient email address'),
       '#default_value' => $this->configuration['recipient'],
       '#maxlength' => '254',
       '#description' => t('You may also use tokens: [node:author:mail], [comment:author:mail], etc. Separate recipients with a comma.'),
-    );
-    $form['subject'] = array(
+    ];
+    $form['subject'] = [
       '#type' => 'textfield',
       '#title' => t('Subject'),
       '#default_value' => $this->configuration['subject'],
       '#maxlength' => '254',
       '#description' => t('The subject of the message.'),
-    );
-    $form['message'] = array(
+    ];
+    $form['message'] = [
       '#type' => 'textarea',
       '#title' => t('Message'),
       '#default_value' => $this->configuration['message'],
       '#cols' => '80',
       '#rows' => '20',
       '#description' => t('The message that should be sent. You may include placeholders like [node:title], [user:account-name], [user:display-name] and [comment:body] to represent data that will be different each time message is sent. Not all placeholders will be available in all contexts.'),
-    );
+    ];
     return $form;
   }
 
@@ -193,7 +193,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
   public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
     if (!$this->emailValidator->isValid($form_state->getValue('recipient')) && strpos($form_state->getValue('recipient'), ':mail') === FALSE) {
       // We want the literal %author placeholder to be emphasized in the error message.
-      $form_state->setErrorByName('recipient', t('Enter a valid email address or use a token email address such as %author.', array('%author' => '[node:author:mail]')));
+      $form_state->setErrorByName('recipient', t('Enter a valid email address or use a token email address such as %author.', ['%author' => '[node:author:mail]']));
     }
   }
 
diff --git a/core/modules/action/src/Plugin/Action/GotoAction.php b/core/modules/action/src/Plugin/Action/GotoAction.php
index 5c1b55220049c60eadc12c1f39dd64ae3434af17..44e871b92a96fcecb2e3b7e96545559bfcba7f7d 100644
--- a/core/modules/action/src/Plugin/Action/GotoAction.php
+++ b/core/modules/action/src/Plugin/Action/GotoAction.php
@@ -103,22 +103,22 @@ public function execute($object = NULL) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'url' => '',
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['url'] = array(
+    $form['url'] = [
       '#type' => 'textfield',
       '#title' => t('URL'),
-      '#description' => t('The URL to which the user should be redirected. This can be an internal URL like /node/1234 or an external URL like @url.', array('@url' => 'http://example.com')),
+      '#description' => t('The URL to which the user should be redirected. This can be an internal URL like /node/1234 or an external URL like @url.', ['@url' => 'http://example.com']),
       '#default_value' => $this->configuration['url'],
       '#required' => TRUE,
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/action/src/Plugin/Action/MessageAction.php b/core/modules/action/src/Plugin/Action/MessageAction.php
index ab32b4c9fc410916450484aaf862343bff8ff4b1..c85d249b08cbf730028805b55fcde971ed26209f 100644
--- a/core/modules/action/src/Plugin/Action/MessageAction.php
+++ b/core/modules/action/src/Plugin/Action/MessageAction.php
@@ -84,23 +84,23 @@ public function execute($entity = NULL) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'message' => '',
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['message'] = array(
+    $form['message'] = [
       '#type' => 'textarea',
       '#title' => t('Message'),
       '#default_value' => $this->configuration['message'],
       '#required' => TRUE,
       '#rows' => '8',
       '#description' => t('The message to be displayed to the current user. You may include placeholders like [node:title], [user:account-name], [user:display-name] and [comment:body] to represent data that will be different each time message is sent. Not all placeholders will be available in all contexts.'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/action/src/Plugin/migrate/source/Action.php b/core/modules/action/src/Plugin/migrate/source/Action.php
index e983b00139eaa1bc16a7c4568f0955e691681792..ac14a44b4700c98357c367fbe665c4978a291c8f 100644
--- a/core/modules/action/src/Plugin/migrate/source/Action.php
+++ b/core/modules/action/src/Plugin/migrate/source/Action.php
@@ -27,12 +27,12 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'aid' => $this->t('Action ID'),
       'type' => $this->t('Module'),
       'callback' => $this->t('Callback function'),
       'parameters' => $this->t('Action configuration'),
-    );
+    ];
     if ($this->getModuleSchemaVersion('system') >= 7000) {
       $fields['label'] = $this->t('Label of the action');
     }
diff --git a/core/modules/action/tests/src/Functional/ActionListTest.php b/core/modules/action/tests/src/Functional/ActionListTest.php
index 2510e86ef13e45216c3e51110f573bd128a87177..309160f4be9c0309ad0b068e17830534cef0da67 100644
--- a/core/modules/action/tests/src/Functional/ActionListTest.php
+++ b/core/modules/action/tests/src/Functional/ActionListTest.php
@@ -16,7 +16,7 @@ class ActionListTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('action');
+  public static $modules = ['action'];
 
   /**
    * Tests the behavior when there are no actions to list in the admin page.
diff --git a/core/modules/action/tests/src/Functional/ActionUninstallTest.php b/core/modules/action/tests/src/Functional/ActionUninstallTest.php
index 93e0bc0c26dc8f517f218d80511283110ee710e2..6b52643bc543613117f7f22cc46a5593b775768e 100644
--- a/core/modules/action/tests/src/Functional/ActionUninstallTest.php
+++ b/core/modules/action/tests/src/Functional/ActionUninstallTest.php
@@ -17,19 +17,19 @@ class ActionUninstallTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('views', 'action');
+  public static $modules = ['views', 'action'];
 
   /**
    * Tests Action uninstall.
    */
   public function testActionUninstall() {
-    \Drupal::service('module_installer')->uninstall(array('action'));
+    \Drupal::service('module_installer')->uninstall(['action']);
 
     $storage = $this->container->get('entity_type.manager')->getStorage('action');
     $storage->resetCache(['user_block_user_action']);
     $this->assertTrue($storage->load('user_block_user_action'), 'Configuration entity \'user_block_user_action\' still exists after uninstalling action module.' );
 
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin_user);
 
     $this->drupalGet('admin/people');
diff --git a/core/modules/action/tests/src/Functional/BulkFormTest.php b/core/modules/action/tests/src/Functional/BulkFormTest.php
index 7d32b94711263f179f2435d5c76b89d6e42ac1e6..439ffe4d6d46ea5455ca159b4c7b797ca7aff6b3 100644
--- a/core/modules/action/tests/src/Functional/BulkFormTest.php
+++ b/core/modules/action/tests/src/Functional/BulkFormTest.php
@@ -18,7 +18,7 @@ class BulkFormTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'action_bulk_test');
+  public static $modules = ['node', 'action_bulk_test'];
 
   /**
    * Tests the bulk form.
@@ -31,30 +31,30 @@ public function testBulkForm() {
     $this->drupalGet('test_bulk_form_empty');
     $this->assertText(t('This view is empty.'), 'Empty text found on empty bulk form.');
 
-    $nodes = array();
+    $nodes = [];
     for ($i = 0; $i < 10; $i++) {
       // Ensure nodes are sorted in the same order they are inserted in the
       // array.
       $timestamp = REQUEST_TIME - $i;
-      $nodes[] = $this->drupalCreateNode(array(
+      $nodes[] = $this->drupalCreateNode([
         'sticky' => FALSE,
         'created' => $timestamp,
         'changed' => $timestamp,
-      ));
+      ]);
     }
 
     $this->drupalGet('test_bulk_form');
 
     // Test that the views edit header appears first.
-    $first_form_element = $this->xpath('//form/div[1][@id = :id]', array(':id' => 'edit-header'));
+    $first_form_element = $this->xpath('//form/div[1][@id = :id]', [':id' => 'edit-header']);
     $this->assertTrue($first_form_element, 'The views form edit header appears first.');
 
     $this->assertFieldById('edit-action', NULL, 'The action select field appears.');
 
     // Make sure a checkbox appears on all rows.
-    $edit = array();
+    $edit = [];
     for ($i = 0; $i < 10; $i++) {
-      $this->assertFieldById('edit-node-bulk-form-' . $i, NULL, format_string('The checkbox on row @row appears.', array('@row' => $i)));
+      $this->assertFieldById('edit-node-bulk-form-' . $i, NULL, format_string('The checkbox on row @row appears.', ['@row' => $i]));
       $edit["node_bulk_form[$i]"] = TRUE;
     }
 
@@ -67,12 +67,12 @@ public function testBulkForm() {
     $this->drupalGet('test_bulk_form');
 
     // Set all nodes to sticky and check that.
-    $edit += array('action' => 'node_make_sticky_action');
+    $edit += ['action' => 'node_make_sticky_action'];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
 
     foreach ($nodes as $node) {
       $changed_node = $node_storage->load($node->id());
-      $this->assertTrue($changed_node->isSticky(), format_string('Node @nid got marked as sticky.', array('@nid' => $node->id())));
+      $this->assertTrue($changed_node->isSticky(), format_string('Node @nid got marked as sticky.', ['@nid' => $node->id()]));
     }
 
     $this->assertText('Make content sticky was applied to 10 items.');
@@ -81,18 +81,18 @@ public function testBulkForm() {
     $node = $node_storage->load($nodes[0]->id());
     $this->assertTrue($node->isPublished(), 'The node is published.');
 
-    $edit = array('node_bulk_form[0]' => TRUE, 'action' => 'node_unpublish_action');
+    $edit = ['node_bulk_form[0]' => TRUE, 'action' => 'node_unpublish_action'];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
 
     $this->assertText('Unpublish content was applied to 1 item.');
 
     // Load the node again.
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $node = $node_storage->load($node->id());
     $this->assertFalse($node->isPublished(), 'A single node has been unpublished.');
 
     // The second node should still be published.
-    $node_storage->resetCache(array($nodes[1]->id()));
+    $node_storage->resetCache([$nodes[1]->id()]);
     $node = $node_storage->load($nodes[1]->id());
     $this->assertTrue($node->isPublished(), 'An unchecked node is still published.');
 
@@ -105,7 +105,7 @@ public function testBulkForm() {
     $view->save();
 
     $this->drupalGet('test_bulk_form');
-    $options = $this->xpath('//select[@id=:id]/option', array(':id' => 'edit-action'));
+    $options = $this->xpath('//select[@id=:id]/option', [':id' => 'edit-action']);
     $this->assertEqual(count($options), 2);
     $this->assertOption('edit-action', 'node_make_sticky_action');
     $this->assertOption('edit-action', 'node_make_unsticky_action');
@@ -137,17 +137,17 @@ public function testBulkForm() {
 
     $this->drupalGet('test_bulk_form');
     // Call the node delete action.
-    $edit = array();
+    $edit = [];
     for ($i = 0; $i < 5; $i++) {
       $edit["node_bulk_form[$i]"] = TRUE;
     }
-    $edit += array('action' => 'node_delete_action');
+    $edit += ['action' => 'node_delete_action'];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     // Make sure we don't show an action message while we are still on the
     // confirmation page.
     $errors = $this->xpath('//div[contains(@class, "messages--status")]');
     $this->assertFalse($errors, 'No action message shown.');
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     $this->assertText(t('Deleted 5 posts.'));
     // Check if we got redirected to the original page.
     $this->assertUrl('test_bulk_form');
diff --git a/core/modules/action/tests/src/Functional/ConfigurationTest.php b/core/modules/action/tests/src/Functional/ConfigurationTest.php
index 23d0a38191251e1d0c1958e2d211e88eb5352a47..063e4a89ebcba2da78d38f427efcad91c8cae121 100644
--- a/core/modules/action/tests/src/Functional/ConfigurationTest.php
+++ b/core/modules/action/tests/src/Functional/ConfigurationTest.php
@@ -19,24 +19,24 @@ class ConfigurationTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('action');
+  public static $modules = ['action'];
 
   /**
    * Tests configuration of advanced actions through administration interface.
    */
   function testActionConfiguration() {
     // Create a user with permission to view the actions administration pages.
-    $user = $this->drupalCreateUser(array('administer actions'));
+    $user = $this->drupalCreateUser(['administer actions']);
     $this->drupalLogin($user);
 
     // Make a POST request to admin/config/system/actions.
-    $edit = array();
+    $edit = [];
     $edit['action'] = Crypt::hashBase64('action_goto_action');
     $this->drupalPostForm('admin/config/system/actions', $edit, t('Create'));
     $this->assertResponse(200);
 
     // Make a POST request to the individual action configuration page.
-    $edit = array();
+    $edit = [];
     $action_label = $this->randomMachineName();
     $edit['label'] = $action_label;
     $edit['id'] = strtolower($action_label);
@@ -52,7 +52,7 @@ function testActionConfiguration() {
     $this->clickLink(t('Configure'));
     preg_match('|admin/config/system/actions/configure/(.+)|', $this->getUrl(), $matches);
     $aid = $matches[1];
-    $edit = array();
+    $edit = [];
     $new_action_label = $this->randomMachineName();
     $edit['label'] = $new_action_label;
     $edit['url'] = 'admin';
@@ -72,12 +72,12 @@ function testActionConfiguration() {
     $this->drupalGet('admin/config/system/actions');
     $this->clickLink(t('Delete'));
     $this->assertResponse(200);
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm("admin/config/system/actions/configure/$aid/delete", $edit, t('Delete'));
     $this->assertResponse(200);
 
     // Make sure that the action was actually deleted.
-    $this->assertRaw(t('The action %action has been deleted.', array('%action' => $new_action_label)), 'Make sure that we get a delete confirmation message.');
+    $this->assertRaw(t('The action %action has been deleted.', ['%action' => $new_action_label]), 'Make sure that we get a delete confirmation message.');
     $this->drupalGet('admin/config/system/actions');
     $this->assertResponse(200);
     $this->assertNoText($new_action_label, "Make sure the action label does not appear on the overview page after we've deleted the action.");
diff --git a/core/modules/action/tests/src/Unit/Menu/ActionLocalTasksTest.php b/core/modules/action/tests/src/Unit/Menu/ActionLocalTasksTest.php
index 34d24b1ce1b1419c671971c33dea770d9e0cb882..1959f6510a0f511cd9b10f3bba8824b73bea39e1 100644
--- a/core/modules/action/tests/src/Unit/Menu/ActionLocalTasksTest.php
+++ b/core/modules/action/tests/src/Unit/Menu/ActionLocalTasksTest.php
@@ -12,7 +12,7 @@
 class ActionLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array('action' => 'core/modules/action');
+    $this->directoryList = ['action' => 'core/modules/action'];
     parent::setUp();
   }
 
@@ -20,7 +20,7 @@ protected function setUp() {
    * Tests local task existence.
    */
   public function testActionLocalTasks() {
-    $this->assertLocalTasks('entity.action.collection', array(array('action.admin')));
+    $this->assertLocalTasks('entity.action.collection', [['action.admin']]);
   }
 
 }
diff --git a/core/modules/aggregator/aggregator.install b/core/modules/aggregator/aggregator.install
index 5edc50318152d6dd720b94ee281240d29854685e..9e05400b8c18a3849dc07d3377f722d3a129e31a 100644
--- a/core/modules/aggregator/aggregator.install
+++ b/core/modules/aggregator/aggregator.install
@@ -10,11 +10,11 @@
  */
 function aggregator_requirements($phase) {
   $has_curl = function_exists('curl_init');
-  $requirements = array();
-  $requirements['curl'] = array(
+  $requirements = [];
+  $requirements['curl'] = [
     'title' => t('cURL'),
     'value' => $has_curl ? t('Enabled') : t('Not found'),
-  );
+  ];
   if (!$has_curl) {
     $requirements['curl']['severity'] = REQUIREMENT_ERROR;
     $requirements['curl']['description'] = t('The Aggregator module requires the <a href="https://secure.php.net/manual/en/curl.setup.php">PHP cURL library</a>. For more information, see the <a href="https://www.drupal.org/requirements/php/curl">online information on installing the PHP cURL extension</a>.');
diff --git a/core/modules/aggregator/aggregator.module b/core/modules/aggregator/aggregator.module
index cf32734a30c20c1444cb59496d197a9c689d01e7..0f856e312573951a1de7892f4ce6136f77969a9a 100644
--- a/core/modules/aggregator/aggregator.module
+++ b/core/modules/aggregator/aggregator.module
@@ -25,35 +25,35 @@ function aggregator_help($route_name, RouteMatchInterface $route_match) {
       $path_validator = \Drupal::pathValidator();
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Aggregator module is an on-site syndicator and news reader that gathers and displays fresh content from RSS-, RDF-, and Atom-based feeds made available across the web. Thousands of sites (particularly news sites and blogs) publish their latest headlines in feeds, using a number of standardized XML-based formats. For more information, see the <a href=":aggregator-module">online documentation for the Aggregator module</a>.', array(':aggregator-module' => 'https://www.drupal.org/documentation/modules/aggregator')) . '</p>';
+      $output .= '<p>' . t('The Aggregator module is an on-site syndicator and news reader that gathers and displays fresh content from RSS-, RDF-, and Atom-based feeds made available across the web. Thousands of sites (particularly news sites and blogs) publish their latest headlines in feeds, using a number of standardized XML-based formats. For more information, see the <a href=":aggregator-module">online documentation for the Aggregator module</a>.', [':aggregator-module' => 'https://www.drupal.org/documentation/modules/aggregator']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       // Check if the aggregator sources View is enabled.
       if ($url = $path_validator->getUrlIfValid('aggregator/sources')) {
         $output .= '<dt>' . t('Viewing feeds') . '</dt>';
-        $output .= '<dd>' . t('Users view feed content in the <a href=":aggregator">main aggregator display</a>, or by <a href=":aggregator-sources">their source</a> (usually via an RSS feed reader). The most recent content in a feed can be displayed as a block through the <a href=":admin-block">Blocks administration page</a>.', array(':aggregator' => \Drupal::url('aggregator.page_last'), ':aggregator-sources' => $url->toString(), ':admin-block' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
+        $output .= '<dd>' . t('Users view feed content in the <a href=":aggregator">main aggregator display</a>, or by <a href=":aggregator-sources">their source</a> (usually via an RSS feed reader). The most recent content in a feed can be displayed as a block through the <a href=":admin-block">Blocks administration page</a>.', [':aggregator' => \Drupal::url('aggregator.page_last'), ':aggregator-sources' => $url->toString(), ':admin-block' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#']) . '</dd>';
       }
       $output .= '<dt>' . t('Adding, editing, and deleting feeds') . '</dt>';
-      $output .= '<dd>' . t('Administrators can add, edit, and delete feeds, and choose how often to check each feed for newly updated items on the <a href=":feededit">Aggregator administration page</a>.', array(':feededit' => \Drupal::url('aggregator.admin_overview'))) . '</dd>';
+      $output .= '<dd>' . t('Administrators can add, edit, and delete feeds, and choose how often to check each feed for newly updated items on the <a href=":feededit">Aggregator administration page</a>.', [':feededit' => \Drupal::url('aggregator.admin_overview')]) . '</dd>';
       $output .= '<dt>' . t('Configuring the display of feed items') . '</dt>';
-      $output .= '<dd>' . t('Administrators can choose how many items are displayed in the listing pages, which HTML tags are allowed in the content of feed items, and whether they should be trimmed to a maximum number of characters on the <a href=":settings">Aggregator settings page</a>.', array(':settings' => \Drupal::url('aggregator.admin_settings'))) . '</dd>';
+      $output .= '<dd>' . t('Administrators can choose how many items are displayed in the listing pages, which HTML tags are allowed in the content of feed items, and whether they should be trimmed to a maximum number of characters on the <a href=":settings">Aggregator settings page</a>.', [':settings' => \Drupal::url('aggregator.admin_settings')]) . '</dd>';
       $output .= '<dt>' . t('Discarding old feed items') . '</dt>';
-      $output .= '<dd>' . t('Administrators can choose whether to discard feed items that are older than a specified period of time on the <a href=":settings">Aggregator settings page</a>. This requires a correctly configured cron maintenance task (see below).', array(':settings' => \Drupal::url('aggregator.admin_settings'))) . '<dd>';
+      $output .= '<dd>' . t('Administrators can choose whether to discard feed items that are older than a specified period of time on the <a href=":settings">Aggregator settings page</a>. This requires a correctly configured cron maintenance task (see below).', [':settings' => \Drupal::url('aggregator.admin_settings')]) . '<dd>';
 
       $output .= '<dt>' . t('<abbr title="Outline Processor Markup Language">OPML</abbr> integration') . '</dt>';
       // Check if the aggregator opml View is enabled.
       if ($url = $path_validator->getUrlIfValid('aggregator/opml')) {
-        $output .= '<dd>' . t('A <a href=":aggregator-opml">machine-readable OPML file</a> of all feeds is available. OPML is an XML-based file format used to share outline-structured information such as a list of RSS feeds. Feeds can also be <a href=":import-opml">imported via an OPML file</a>.', array(':aggregator-opml' => $url->toString(), ':import-opml' => \Drupal::url('aggregator.opml_add'))) . '</dd>';
+        $output .= '<dd>' . t('A <a href=":aggregator-opml">machine-readable OPML file</a> of all feeds is available. OPML is an XML-based file format used to share outline-structured information such as a list of RSS feeds. Feeds can also be <a href=":import-opml">imported via an OPML file</a>.', [':aggregator-opml' => $url->toString(), ':import-opml' => \Drupal::url('aggregator.opml_add')]) . '</dd>';
       }
       $output .= '<dt>' . t('Configuring cron') . '</dt>';
-      $output .= '<dd>' . t('A working <a href=":cron">cron maintenance task</a> is required to update feeds automatically.', array(':cron' => \Drupal::url('system.cron_settings'))) . '</dd>';
+      $output .= '<dd>' . t('A working <a href=":cron">cron maintenance task</a> is required to update feeds automatically.', [':cron' => \Drupal::url('system.cron_settings')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
     case 'aggregator.admin_overview':
       // Don't use placeholders for possibility to change URLs for translators.
       $output = '<p>' . t('Many sites publish their headlines and posts in feeds, using a number of standardized XML-based formats. The aggregator supports <a href="http://en.wikipedia.org/wiki/Rss">RSS</a>, <a href="http://en.wikipedia.org/wiki/Resource_Description_Framework">RDF</a>, and <a href="http://en.wikipedia.org/wiki/Atom_%28standard%29">Atom</a>.') . '</p>';
-      $output .= '<p>' . t('Current feeds are listed below, and <a href=":addfeed">new feeds may be added</a>. For each feed, the <em>latest items</em> block may be enabled at the <a href=":block">blocks administration page</a>.', array(':addfeed' => \Drupal::url('aggregator.feed_add'), ':block' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</p>';
+      $output .= '<p>' . t('Current feeds are listed below, and <a href=":addfeed">new feeds may be added</a>. For each feed, the <em>latest items</em> block may be enabled at the <a href=":block">blocks administration page</a>.', [':addfeed' => \Drupal::url('aggregator.feed_add'), ':block' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#']) . '</p>';
       return $output;
 
     case 'aggregator.feed_add':
@@ -68,66 +68,66 @@ function aggregator_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function aggregator_theme() {
-  return array(
-    'aggregator_feed' => array(
+  return [
+    'aggregator_feed' => [
       'render element' => 'elements',
       'file' => 'aggregator.theme.inc',
-    ),
-    'aggregator_item' => array(
+    ],
+    'aggregator_item' => [
       'render element' => 'elements',
       'file' => 'aggregator.theme.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
  * Implements hook_entity_extra_field_info().
  */
 function aggregator_entity_extra_field_info() {
-  $extra = array();
+  $extra = [];
 
-  $extra['aggregator_feed']['aggregator_feed'] = array(
-    'display' => array(
-      'items' => array(
+  $extra['aggregator_feed']['aggregator_feed'] = [
+    'display' => [
+      'items' => [
         'label' => t('Items'),
         'description' => t('Items associated with this feed'),
         'weight' => 0,
-      ),
+      ],
       // @todo Move to a formatter at https://www.drupal.org/node/2339917.
-      'image' => array(
+      'image' => [
         'label' => t('Image'),
         'description' => t('The feed image'),
         'weight' => 2,
-      ),
+      ],
       // @todo Move to a formatter at https://www.drupal.org/node/2149845.
-      'description' => array(
+      'description' => [
         'label' => t('Description'),
         'description' => t('The description of this feed'),
         'weight' => 3,
-      ),
-      'more_link' => array(
+      ],
+      'more_link' => [
         'label' => t('More link'),
         'description' => t('A more link to the feed detail page'),
         'weight' => 5,
-      ),
-      'feed_icon' => array(
+      ],
+      'feed_icon' => [
         'label' => t('Feed icon'),
         'description' => t('An icon that links to the feed URL'),
         'weight' => 6,
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
-  $extra['aggregator_item']['aggregator_item'] = array(
-    'display' => array(
+  $extra['aggregator_item']['aggregator_item'] = [
+    'display' => [
       // @todo Move to a formatter at https://www.drupal.org/node/2149845.
-      'description' => array(
+      'description' => [
         'label' => t('Description'),
         'description' => t('The description of this feed item'),
         'weight' => 2,
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   return $extra;
 }
diff --git a/core/modules/aggregator/src/AggregatorFeedViewsData.php b/core/modules/aggregator/src/AggregatorFeedViewsData.php
index 2eb0d344f4f2ba26ae305c694e851cd41f7372e4..b47f837dbdf0b5e4745f04beb60227a4f6ebf241 100644
--- a/core/modules/aggregator/src/AggregatorFeedViewsData.php
+++ b/core/modules/aggregator/src/AggregatorFeedViewsData.php
@@ -15,12 +15,12 @@ class AggregatorFeedViewsData extends EntityViewsData {
   public function getViewsData() {
     $data = parent::getViewsData();
 
-    $data['aggregator_feed']['table']['join'] = array(
-      'aggregator_item' => array(
+    $data['aggregator_feed']['table']['join'] = [
+      'aggregator_item' => [
         'left_field' => 'fid',
         'field' => 'fid',
-      ),
-    );
+      ],
+    ];
 
     $data['aggregator_feed']['fid']['help'] = $this->t('The unique ID of the aggregator feed.');
     $data['aggregator_feed']['fid']['argument']['id'] = 'aggregator_fid';
diff --git a/core/modules/aggregator/src/Controller/AggregatorController.php b/core/modules/aggregator/src/Controller/AggregatorController.php
index c84fb18b6342644bf17ff0a9780c20d1ad8229d4..021e4d10a29396282be2e78ede8fcd45af87103b 100644
--- a/core/modules/aggregator/src/Controller/AggregatorController.php
+++ b/core/modules/aggregator/src/Controller/AggregatorController.php
@@ -48,9 +48,9 @@ public static function create(ContainerInterface $container) {
    */
   public function feedAdd() {
     $feed = $this->entityManager()->getStorage('aggregator_feed')
-      ->create(array(
+      ->create([
         'refresh' => 3600,
-      ));
+      ]);
     return $this->entityFormBuilder()->getForm($feed);
   }
 
@@ -67,15 +67,15 @@ public function feedAdd() {
    */
   protected function buildPageList(array $items, $feed_source = '') {
     // Assemble output.
-    $build = array(
+    $build = [
       '#type' => 'container',
-      '#attributes' => array('class' => array('aggregator-wrapper')),
-    );
-    $build['feed_source'] = is_array($feed_source) ? $feed_source : array('#markup' => $feed_source);
+      '#attributes' => ['class' => ['aggregator-wrapper']],
+    ];
+    $build['feed_source'] = is_array($feed_source) ? $feed_source : ['#markup' => $feed_source];
     if ($items) {
       $build['items'] = $this->entityManager()->getViewBuilder('aggregator_item')
         ->viewMultiple($items, 'default');
-      $build['pager'] = array('#type' => 'pager');
+      $build['pager'] = ['#type' => 'pager'];
     }
     return $build;
   }
@@ -94,8 +94,8 @@ protected function buildPageList(array $items, $feed_source = '') {
    */
   public function feedRefresh(FeedInterface $aggregator_feed) {
     $message = $aggregator_feed->refreshItems()
-      ? $this->t('There is new syndicated content from %site.', array('%site' => $aggregator_feed->label()))
-      : $this->t('There is no new syndicated content from %site.', array('%site' => $aggregator_feed->label()));
+      ? $this->t('There is new syndicated content from %site.', ['%site' => $aggregator_feed->label()])
+      : $this->t('There is no new syndicated content from %site.', ['%site' => $aggregator_feed->label()]);
     drupal_set_message($message);
     return $this->redirect('aggregator.admin_overview');
   }
@@ -111,22 +111,22 @@ public function adminOverview() {
     $feeds = $entity_manager->getStorage('aggregator_feed')
       ->loadMultiple();
 
-    $header = array($this->t('Title'), $this->t('Items'), $this->t('Last update'), $this->t('Next update'), $this->t('Operations'));
-    $rows = array();
+    $header = [$this->t('Title'), $this->t('Items'), $this->t('Last update'), $this->t('Next update'), $this->t('Operations')];
+    $rows = [];
     /** @var \Drupal\aggregator\FeedInterface[] $feeds */
     foreach ($feeds as $feed) {
-      $row = array();
+      $row = [];
       $row[] = $feed->link();
       $row[] = $this->formatPlural($entity_manager->getStorage('aggregator_item')->getItemCount($feed), '1 item', '@count items');
       $last_checked = $feed->getLastCheckedTime();
       $refresh_rate = $feed->getRefreshRate();
 
-      $row[] = ($last_checked ? $this->t('@time ago', array('@time' => $this->dateFormatter->formatInterval(REQUEST_TIME - $last_checked))) : $this->t('never'));
+      $row[] = ($last_checked ? $this->t('@time ago', ['@time' => $this->dateFormatter->formatInterval(REQUEST_TIME - $last_checked)]) : $this->t('never'));
       if (!$last_checked && $refresh_rate) {
         $next_update = $this->t('imminently');
       }
       elseif ($last_checked && $refresh_rate) {
-        $next_update = $next = $this->t('%time left', array('%time' => $this->dateFormatter->formatInterval($last_checked + $refresh_rate - REQUEST_TIME)));
+        $next_update = $next = $this->t('%time left', ['%time' => $this->dateFormatter->formatInterval($last_checked + $refresh_rate - REQUEST_TIME)]);
       }
       else {
         $next_update = $this->t('never');
@@ -136,33 +136,33 @@ public function adminOverview() {
         'title' => $this->t('Edit'),
         'url' => Url::fromRoute('entity.aggregator_feed.edit_form', ['aggregator_feed' => $feed->id()]),
       ];
-      $links['delete'] = array(
+      $links['delete'] = [
         'title' => $this->t('Delete'),
         'url' => Url::fromRoute('entity.aggregator_feed.delete_form', ['aggregator_feed' => $feed->id()]),
-      );
-      $links['delete_items'] = array(
+      ];
+      $links['delete_items'] = [
         'title' => $this->t('Delete items'),
         'url' => Url::fromRoute('aggregator.feed_items_delete', ['aggregator_feed' => $feed->id()]),
-      );
-      $links['update'] = array(
+      ];
+      $links['update'] = [
         'title' => $this->t('Update items'),
         'url' => Url::fromRoute('aggregator.feed_refresh', ['aggregator_feed' => $feed->id()]),
-      );
-      $row[] = array(
-        'data' => array(
+      ];
+      $row[] = [
+        'data' => [
           '#type' => 'operations',
           '#links' => $links,
-        ),
-      );
+        ],
+      ];
       $rows[] = $row;
     }
-    $build['feeds'] = array(
+    $build['feeds'] = [
       '#prefix' => '<h3>' . $this->t('Feed overview') . '</h3>',
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
-      '#empty' => $this->t('No feeds available. <a href=":link">Add feed</a>.', array(':link' => $this->url('aggregator.feed_add'))),
-    );
+      '#empty' => $this->t('No feeds available. <a href=":link">Add feed</a>.', [':link' => $this->url('aggregator.feed_add')]),
+    ];
 
     return $build;
   }
@@ -176,7 +176,7 @@ public function adminOverview() {
   public function pageLast() {
     $items = $this->entityManager()->getStorage('aggregator_item')->loadAll(20);
     $build = $this->buildPageList($items);
-    $build['#attached']['feed'][] = array('aggregator/rss', $this->config('system.site')->get('name') . ' ' . $this->t('aggregator'));
+    $build['#attached']['feed'][] = ['aggregator/rss', $this->config('system.site')->get('name') . ' ' . $this->t('aggregator')];
     return $build;
   }
 
diff --git a/core/modules/aggregator/src/Entity/Feed.php b/core/modules/aggregator/src/Entity/Feed.php
index 834a55e9a85e9187c6e1a1593c692196ba77a686..3b14e8c24e367b4a2c0a93f0fe064d94f5f19e0e 100644
--- a/core/modules/aggregator/src/Entity/Feed.php
+++ b/core/modules/aggregator/src/Entity/Feed.php
@@ -88,11 +88,11 @@ public function refreshItems() {
    * {@inheritdoc}
    */
   public static function preCreate(EntityStorageInterface $storage, array &$values) {
-    $values += array(
+    $values += [
       'link' => '',
       'description' => '',
       'image' => '',
-    );
+    ];
   }
 
   /**
@@ -143,10 +143,10 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setDescription(t('The name of the feed (or the name of the website providing the feed).'))
       ->setRequired(TRUE)
       ->setSetting('max_length', 255)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -5,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE)
       ->addConstraint('FeedTitle');
 
@@ -154,15 +154,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('URL'))
       ->setDescription(t('The fully-qualified URL of the feed.'))
       ->setRequired(TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'uri',
         'weight' => -3,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE)
       ->addConstraint('FeedUrl');
 
-    $intervals = array(900, 1800, 3600, 7200, 10800, 21600, 32400, 43200, 64800, 86400, 172800, 259200, 604800, 1209600, 2419200);
-    $period = array_map(array(\Drupal::service('date.formatter'), 'formatInterval'), array_combine($intervals, $intervals));
+    $intervals = [900, 1800, 3600, 7200, 10800, 21600, 32400, 43200, 64800, 86400, 172800, 259200, 604800, 1209600, 2419200];
+    $period = array_map([\Drupal::service('date.formatter'), 'formatInterval'], array_combine($intervals, $intervals));
     $period[AGGREGATOR_CLEAR_NEVER] = t('Never');
 
     $fields['refresh'] = BaseFieldDefinition::create('list_integer')
@@ -171,21 +171,21 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setSetting('unsigned', TRUE)
       ->setRequired(TRUE)
       ->setSetting('allowed_values', $period)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'options_select',
         'weight' => -2,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['checked'] = BaseFieldDefinition::create('timestamp')
       ->setLabel(t('Checked'))
       ->setDescription(t('Last time feed was checked for new items, as Unix timestamp.'))
       ->setDefaultValue(0)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'inline',
         'type' => 'timestamp_ago',
         'weight' => 1,
-      ))
+      ])
       ->setDisplayConfigurable('view', TRUE);
 
     $fields['queued'] = BaseFieldDefinition::create('timestamp')
@@ -196,15 +196,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields['link'] = BaseFieldDefinition::create('uri')
       ->setLabel(t('URL'))
       ->setDescription(t('The link of the feed.'))
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'inline',
         'weight' => 4,
-      ))
+      ])
       ->setDisplayConfigurable('view', TRUE);
 
     $fields['description'] = BaseFieldDefinition::create('string_long')
       ->setLabel(t('Description'))
-      ->setDescription(t("The parent website's description that comes from the @description element in the feed.", array('@description' => '<description>')));
+      ->setDescription(t("The parent website's description that comes from the @description element in the feed.", ['@description' => '<description>']));
 
     $fields['image'] = BaseFieldDefinition::create('uri')
       ->setLabel(t('Image'))
diff --git a/core/modules/aggregator/src/Entity/Item.php b/core/modules/aggregator/src/Entity/Item.php
index 969e4e40bdac8bce10ddb0a09cb67c5abcdc02f5..ef0c6d245189ca7eb5a847ea835f4431d51cbbda 100644
--- a/core/modules/aggregator/src/Entity/Item.php
+++ b/core/modules/aggregator/src/Entity/Item.php
@@ -61,11 +61,11 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setRequired(TRUE)
       ->setDescription(t('The aggregator feed entity associated with this item.'))
       ->setSetting('target_type', 'aggregator_feed')
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'entity_reference_label',
         'weight' => 0,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['title'] = BaseFieldDefinition::create('string')
@@ -75,18 +75,18 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields['link'] = BaseFieldDefinition::create('uri')
       ->setLabel(t('Link'))
       ->setDescription(t('The link of the feed item.'))
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'region' => 'hidden',
-      ))
+      ])
       ->setDisplayConfigurable('view', TRUE);
 
     $fields['author'] = BaseFieldDefinition::create('string')
       ->setLabel(t('Author'))
       ->setDescription(t('The author of the feed item.'))
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'weight' => 3,
-      ))
+      ])
       ->setDisplayConfigurable('view', TRUE);
 
     $fields['description'] = BaseFieldDefinition::create('string_long')
@@ -96,11 +96,11 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields['timestamp'] = BaseFieldDefinition::create('created')
       ->setLabel(t('Posted on'))
       ->setDescription(t('Posted date of the feed item, as a Unix timestamp.'))
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'timestamp_ago',
         'weight' => 1,
-      ))
+      ])
       ->setDisplayConfigurable('view', TRUE);
 
     // @todo Convert to a real UUID field in
diff --git a/core/modules/aggregator/src/FeedForm.php b/core/modules/aggregator/src/FeedForm.php
index 3447cc8c0f4537aace66670ae49a282c61c85362..1580a307dc1fa80043ca254b1d90ad7f5c558e3b 100644
--- a/core/modules/aggregator/src/FeedForm.php
+++ b/core/modules/aggregator/src/FeedForm.php
@@ -20,12 +20,12 @@ public function save(array $form, FormStateInterface $form_state) {
     $label = $feed->label();
     $view_link = $feed->link($label, 'canonical');
     if ($status == SAVED_UPDATED) {
-      drupal_set_message($this->t('The feed %feed has been updated.', array('%feed' => $view_link)));
+      drupal_set_message($this->t('The feed %feed has been updated.', ['%feed' => $view_link]));
       $form_state->setRedirectUrl($feed->urlInfo('canonical'));
     }
     else {
-      $this->logger('aggregator')->notice('Feed %feed added.', array('%feed' => $feed->label(), 'link' => $this->l($this->t('View'), new Url('aggregator.admin_overview'))));
-      drupal_set_message($this->t('The feed %feed has been added.', array('%feed' => $view_link)));
+      $this->logger('aggregator')->notice('Feed %feed added.', ['%feed' => $feed->label(), 'link' => $this->l($this->t('View'), new Url('aggregator.admin_overview'))]);
+      drupal_set_message($this->t('The feed %feed has been added.', ['%feed' => $view_link]));
     }
   }
 
diff --git a/core/modules/aggregator/src/FeedStorage.php b/core/modules/aggregator/src/FeedStorage.php
index 5085e6d353394bed31c21163733dadaf11e47cf8..ded3531380d1d7df3e0ca98f10938ff6905bcb88 100644
--- a/core/modules/aggregator/src/FeedStorage.php
+++ b/core/modules/aggregator/src/FeedStorage.php
@@ -16,10 +16,10 @@ class FeedStorage extends SqlContentEntityStorage implements FeedStorageInterfac
    * {@inheritdoc}
    */
   public function getFeedIdsToRefresh() {
-    return $this->database->query('SELECT fid FROM {aggregator_feed} WHERE queued = 0 AND checked + refresh < :time AND refresh <> :never', array(
+    return $this->database->query('SELECT fid FROM {aggregator_feed} WHERE queued = 0 AND checked + refresh < :time AND refresh <> :never', [
       ':time' => REQUEST_TIME,
       ':never' => AGGREGATOR_CLEAR_NEVER,
-    ))->fetchCol();
+    ])->fetchCol();
   }
 
 }
diff --git a/core/modules/aggregator/src/FeedViewBuilder.php b/core/modules/aggregator/src/FeedViewBuilder.php
index 5ce69ffd8732896cab70bba7742818f0ed4c2422..1efaa3028cefcbfc9010643d397d28169d53958b 100644
--- a/core/modules/aggregator/src/FeedViewBuilder.php
+++ b/core/modules/aggregator/src/FeedViewBuilder.php
@@ -68,65 +68,65 @@ public function buildComponents(array &$build, array $entities, array $displays,
 
         if ($view_mode == 'full') {
           // Also add the pager.
-          $build[$id]['pager'] = array('#type' => 'pager');
+          $build[$id]['pager'] = ['#type' => 'pager'];
         }
       }
 
       if ($display->getComponent('description')) {
-        $build[$id]['description'] = array(
+        $build[$id]['description'] = [
           '#markup' => $entity->getDescription(),
           '#allowed_tags' => _aggregator_allowed_tags(),
           '#prefix' => '<div class="feed-description">',
           '#suffix' => '</div>',
-        );
+        ];
       }
 
       if ($display->getComponent('image')) {
-        $image_link = array();
+        $image_link = [];
         // Render the image as link if it is available.
         $image = $entity->getImage();
         $label = $entity->label();
         $link_href = $entity->getWebsiteUrl();
         if ($image && $label && $link_href) {
-          $link_title = array(
+          $link_title = [
             '#theme' => 'image',
             '#uri' => $image,
             '#alt' => $label,
-          );
-          $image_link = array(
+          ];
+          $image_link = [
             '#type' => 'link',
             '#title' => $link_title,
             '#url' => Url::fromUri($link_href),
-            '#options' => array(
-              'attributes' => array('class' => array('feed-image')),
-            ),
-          );
+            '#options' => [
+              'attributes' => ['class' => ['feed-image']],
+            ],
+          ];
         }
         $build[$id]['image'] = $image_link;
       }
 
       if ($display->getComponent('feed_icon')) {
-        $build[$id]['feed_icon'] = array(
+        $build[$id]['feed_icon'] = [
           '#theme' => 'feed_icon',
           '#url' => $entity->getUrl(),
-          '#title' => t('@title feed', array('@title' => $entity->label())),
-        );
+          '#title' => t('@title feed', ['@title' => $entity->label()]),
+        ];
       }
 
       if ($display->getComponent('more_link')) {
         $title_stripped = strip_tags($entity->label());
-        $build[$id]['more_link'] = array(
+        $build[$id]['more_link'] = [
           '#type' => 'link',
-          '#title' => t('More<span class="visually-hidden"> posts about @title</span>', array(
+          '#title' => t('More<span class="visually-hidden"> posts about @title</span>', [
             '@title' => $title_stripped,
-          )),
+          ]),
           '#url' => Url::fromRoute('entity.aggregator_feed.canonical', ['aggregator_feed' => $entity->id()]),
-          '#options' => array(
-            'attributes' => array(
+          '#options' => [
+            'attributes' => [
               'title' => $title_stripped,
-            ),
-          ),
-        );
+            ],
+          ],
+        ];
       }
 
     }
diff --git a/core/modules/aggregator/src/Form/FeedDeleteForm.php b/core/modules/aggregator/src/Form/FeedDeleteForm.php
index bcf1a3273a0c07851f97c6a28274af9b74e8d1ff..17a179864fc7adbfdb67c62ff4deca5a33f742f6 100644
--- a/core/modules/aggregator/src/Form/FeedDeleteForm.php
+++ b/core/modules/aggregator/src/Form/FeedDeleteForm.php
@@ -28,9 +28,9 @@ protected function getRedirectUrl() {
    * {@inheritdoc}
    */
   protected function getDeletionMessage() {
-    return $this->t('The feed %label has been deleted.', array(
+    return $this->t('The feed %label has been deleted.', [
       '%label' => $this->entity->label(),
-    ));
+    ]);
   }
 
 }
diff --git a/core/modules/aggregator/src/Form/FeedItemsDeleteForm.php b/core/modules/aggregator/src/Form/FeedItemsDeleteForm.php
index 1117359c0d911c3b19cd6da84642037df140566d..48c83dc8386930408df0888060f3401797009cf3 100644
--- a/core/modules/aggregator/src/Form/FeedItemsDeleteForm.php
+++ b/core/modules/aggregator/src/Form/FeedItemsDeleteForm.php
@@ -15,7 +15,7 @@ class FeedItemsDeleteForm extends ContentEntityConfirmFormBase {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to delete all items from the feed %feed?', array('%feed' => $this->entity->label()));
+    return $this->t('Are you sure you want to delete all items from the feed %feed?', ['%feed' => $this->entity->label()]);
   }
 
   /**
diff --git a/core/modules/aggregator/src/Form/OpmlFeedAdd.php b/core/modules/aggregator/src/Form/OpmlFeedAdd.php
index c78a8b73acc2c2008a1c4aa110b705a76c00f6f0..59e70d9727abadcf9a3929c9ee055c5ec386aeaf 100644
--- a/core/modules/aggregator/src/Form/OpmlFeedAdd.php
+++ b/core/modules/aggregator/src/Form/OpmlFeedAdd.php
@@ -63,33 +63,33 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $intervals = array(900, 1800, 3600, 7200, 10800, 21600, 32400, 43200, 64800, 86400, 172800, 259200, 604800, 1209600, 2419200);
-    $period = array_map(array(\Drupal::service('date.formatter'), 'formatInterval'), array_combine($intervals, $intervals));
+    $intervals = [900, 1800, 3600, 7200, 10800, 21600, 32400, 43200, 64800, 86400, 172800, 259200, 604800, 1209600, 2419200];
+    $period = array_map([\Drupal::service('date.formatter'), 'formatInterval'], array_combine($intervals, $intervals));
 
-    $form['upload'] = array(
+    $form['upload'] = [
       '#type' => 'file',
       '#title' => $this->t('OPML File'),
       '#description' => $this->t('Upload an OPML file containing a list of feeds to be imported.'),
-    );
-    $form['remote'] = array(
+    ];
+    $form['remote'] = [
       '#type' => 'url',
       '#title' => $this->t('OPML Remote URL'),
       '#maxlength' => 1024,
       '#description' => $this->t('Enter the URL of an OPML file. This file will be downloaded and processed only once on submission of the form.'),
-    );
-    $form['refresh'] = array(
+    ];
+    $form['refresh'] = [
       '#type' => 'select',
       '#title' => $this->t('Update interval'),
       '#default_value' => 3600,
       '#options' => $period,
-      '#description' => $this->t('The length of time between feed updates. Requires a correctly configured <a href=":cron">cron maintenance task</a>.', array(':cron' => $this->url('system.status'))),
-    );
+      '#description' => $this->t('The length of time between feed updates. Requires a correctly configured <a href=":cron">cron maintenance task</a>.', [':cron' => $this->url('system.status')]),
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Import'),
-    );
+    ];
 
     return $form;
   }
@@ -109,7 +109,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    $validators = array('file_validate_extensions' => array('opml xml'));
+    $validators = ['file_validate_extensions' => ['opml xml']];
     if ($file = file_save_upload('upload', $validators, FALSE, 0)) {
       $data = file_get_contents($file->getFileUri());
     }
@@ -120,8 +120,8 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         $data = (string) $response->getBody();
       }
       catch (RequestException $e) {
-        $this->logger('aggregator')->warning('Failed to download OPML file due to "%error".', array('%error' => $e->getMessage()));
-        drupal_set_message($this->t('Failed to download OPML file due to "%error".', array('%error' => $e->getMessage())));
+        $this->logger('aggregator')->warning('Failed to download OPML file due to "%error".', ['%error' => $e->getMessage()]);
+        drupal_set_message($this->t('Failed to download OPML file due to "%error".', ['%error' => $e->getMessage()]));
         return;
       }
     }
@@ -136,7 +136,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     foreach ($feeds as $feed) {
       // Ensure URL is valid.
       if (!UrlHelper::isValid($feed['url'], TRUE)) {
-        drupal_set_message($this->t('The URL %url is invalid.', array('%url' => $feed['url'])), 'warning');
+        drupal_set_message($this->t('The URL %url is invalid.', ['%url' => $feed['url']]), 'warning');
         continue;
       }
 
@@ -151,20 +151,20 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $result = $this->feedStorage->loadMultiple($ids);
       foreach ($result as $old) {
         if (strcasecmp($old->label(), $feed['title']) == 0) {
-          drupal_set_message($this->t('A feed named %title already exists.', array('%title' => $old->label())), 'warning');
+          drupal_set_message($this->t('A feed named %title already exists.', ['%title' => $old->label()]), 'warning');
           continue 2;
         }
         if (strcasecmp($old->getUrl(), $feed['url']) == 0) {
-          drupal_set_message($this->t('A feed with the URL %url already exists.', array('%url' => $old->getUrl())), 'warning');
+          drupal_set_message($this->t('A feed with the URL %url already exists.', ['%url' => $old->getUrl()]), 'warning');
           continue 2;
         }
       }
 
-      $new_feed = $this->feedStorage->create(array(
+      $new_feed = $this->feedStorage->create([
         'title' => $feed['title'],
         'url' => $feed['url'],
         'refresh' => $form_state->getValue('refresh'),
-      ));
+      ]);
       $new_feed->save();
     }
 
@@ -189,7 +189,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
    * @todo Move this to a parser in https://www.drupal.org/node/1963540.
    */
   protected function parseOpml($opml) {
-    $feeds = array();
+    $feeds = [];
     $xml_parser = xml_parser_create();
     xml_parser_set_option($xml_parser, XML_OPTION_TARGET_ENCODING, 'utf-8');
     if (xml_parse_into_struct($xml_parser, $opml, $values)) {
@@ -197,7 +197,7 @@ protected function parseOpml($opml) {
         if ($entry['tag'] == 'OUTLINE' && isset($entry['attributes'])) {
           $item = $entry['attributes'];
           if (!empty($item['XMLURL']) && !empty($item['TEXT'])) {
-            $feeds[] = array('title' => $item['TEXT'], 'url' => $item['XMLURL']);
+            $feeds[] = ['title' => $item['TEXT'], 'url' => $item['XMLURL']];
           }
         }
       }
diff --git a/core/modules/aggregator/src/Form/SettingsForm.php b/core/modules/aggregator/src/Form/SettingsForm.php
index edd574189df89c03d1758ed1fb8ba63ac0948edb..48b2dfe87e28f0d1140b1e78580dcc280580f081 100644
--- a/core/modules/aggregator/src/Form/SettingsForm.php
+++ b/core/modules/aggregator/src/Form/SettingsForm.php
@@ -21,25 +21,25 @@ class SettingsForm extends ConfigFormBase {
    *
    * @var \Drupal\aggregator\Plugin\AggregatorPluginManager[]
    */
-  protected $managers = array();
+  protected $managers = [];
 
   /**
    * The instantiated plugin instances that have configuration forms.
    *
    * @var \Drupal\Core\Plugin\PluginFormInterface[]
    */
-  protected $configurableInstances = array();
+  protected $configurableInstances = [];
 
   /**
    * The aggregator plugin definitions.
    *
    * @var array
    */
-  protected $definitions = array(
-    'fetcher' => array(),
-    'parser' => array(),
-    'processor' => array(),
-  );
+  protected $definitions = [
+    'fetcher' => [],
+    'parser' => [],
+    'processor' => [],
+  ];
 
   /**
    * Constructs a \Drupal\aggregator\SettingsForm object.
@@ -58,15 +58,15 @@ class SettingsForm extends ConfigFormBase {
   public function __construct(ConfigFactoryInterface $config_factory, AggregatorPluginManager $fetcher_manager, AggregatorPluginManager $parser_manager, AggregatorPluginManager $processor_manager, TranslationInterface $string_translation) {
     parent::__construct($config_factory);
     $this->stringTranslation = $string_translation;
-    $this->managers = array(
+    $this->managers = [
       'fetcher' => $fetcher_manager,
       'parser' => $parser_manager,
       'processor' => $processor_manager,
-    );
+    ];
     // Get all available fetcher, parser and processor definitions.
-    foreach (array('fetcher', 'parser', 'processor') as $type) {
+    foreach (['fetcher', 'parser', 'processor'] as $type) {
       foreach ($this->managers[$type]->getDefinitions() as $id => $definition) {
-        $this->definitions[$type][$id] = SafeMarkup::format('@title <span class="description">@description</span>', array('@title' => $definition['title'], '@description' => $definition['description']));
+        $this->definitions[$type][$id] = SafeMarkup::format('@title <span class="description">@description</span>', ['@title' => $definition['title'], '@description' => $definition['description']]);
       }
     }
   }
@@ -105,56 +105,56 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('aggregator.settings');
 
     // Global aggregator settings.
-    $form['aggregator_allowed_html_tags'] = array(
+    $form['aggregator_allowed_html_tags'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Allowed HTML tags'),
       '#size' => 80,
       '#maxlength' => 255,
       '#default_value' => $config->get('items.allowed_html'),
       '#description' => $this->t('A space-separated list of HTML tags allowed in the content of feed items. Disallowed tags are stripped from the content.'),
-    );
+    ];
 
     // Only show basic configuration if there are actually options.
-    $basic_conf = array();
+    $basic_conf = [];
     if (count($this->definitions['fetcher']) > 1) {
-      $basic_conf['aggregator_fetcher'] = array(
+      $basic_conf['aggregator_fetcher'] = [
         '#type' => 'radios',
         '#title' => $this->t('Fetcher'),
         '#description' => $this->t('Fetchers download data from an external source. Choose a fetcher suitable for the external source you would like to download from.'),
         '#options' => $this->definitions['fetcher'],
         '#default_value' => $config->get('fetcher'),
-      );
+      ];
     }
     if (count($this->definitions['parser']) > 1) {
-      $basic_conf['aggregator_parser'] = array(
+      $basic_conf['aggregator_parser'] = [
         '#type' => 'radios',
         '#title' => $this->t('Parser'),
         '#description' => $this->t('Parsers transform downloaded data into standard structures. Choose a parser suitable for the type of feeds you would like to aggregate.'),
         '#options' => $this->definitions['parser'],
         '#default_value' => $config->get('parser'),
-      );
+      ];
     }
     if (count($this->definitions['processor']) > 1) {
-      $basic_conf['aggregator_processors'] = array(
+      $basic_conf['aggregator_processors'] = [
         '#type' => 'checkboxes',
         '#title' => $this->t('Processors'),
         '#description' => $this->t('Processors act on parsed feed data, for example they store feed items. Choose the processors suitable for your task.'),
         '#options' => $this->definitions['processor'],
         '#default_value' => $config->get('processors'),
-      );
+      ];
     }
     if (count($basic_conf)) {
-      $form['basic_conf'] = array(
+      $form['basic_conf'] = [
         '#type' => 'details',
         '#title' => $this->t('Basic configuration'),
         '#description' => $this->t('For most aggregation tasks, the default settings are fine.'),
         '#open' => TRUE,
-      );
+      ];
       $form['basic_conf'] += $basic_conf;
     }
 
     // Call buildConfigurationForm() on the active fetcher and parser.
-    foreach (array('fetcher', 'parser') as $type) {
+    foreach (['fetcher', 'parser'] as $type) {
       $active = $config->get($type);
       if (array_key_exists($active, $this->definitions[$type])) {
         $instance = $this->managers[$type]->createInstance($active);
@@ -169,7 +169,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     // Implementing processor plugins will expect an array at $form['processors'].
-    $form['processors'] = array();
+    $form['processors'] = [];
     // Call buildConfigurationForm() for each active processor.
     foreach ($this->definitions['processor'] as $id => $definition) {
       if (in_array($id, $config->get('processors'))) {
diff --git a/core/modules/aggregator/src/ItemViewBuilder.php b/core/modules/aggregator/src/ItemViewBuilder.php
index feb0ffafb86fd2819a67d4361ec253314d955946..feb35b58358378df11e0ee9b6bbf8c5a7050267d 100644
--- a/core/modules/aggregator/src/ItemViewBuilder.php
+++ b/core/modules/aggregator/src/ItemViewBuilder.php
@@ -20,12 +20,12 @@ public function buildComponents(array &$build, array $entities, array $displays,
       $display = $displays[$bundle];
 
       if ($display->getComponent('description')) {
-        $build[$id]['description'] = array(
+        $build[$id]['description'] = [
           '#markup' => $entity->getDescription(),
           '#allowed_tags' => _aggregator_allowed_tags(),
           '#prefix' => '<div class="item-description">',
           '#suffix' => '</div>',
-        );
+        ];
       }
     }
   }
diff --git a/core/modules/aggregator/src/ItemsImporter.php b/core/modules/aggregator/src/ItemsImporter.php
index df02564080c63619e789e90dc46cec95849c3441..aa18d65c9afc946603185edc1991ffc72fa1fad4 100644
--- a/core/modules/aggregator/src/ItemsImporter.php
+++ b/core/modules/aggregator/src/ItemsImporter.php
@@ -95,7 +95,7 @@ public function refresh(FeedInterface $feed) {
     }
 
     // Store instances in an array so we dont have to instantiate new objects.
-    $processor_instances = array();
+    $processor_instances = [];
     foreach ($this->config->get('processors') as $processor) {
       try {
         $processor_instances[$processor] = $this->processorManager->createInstance($processor);
@@ -124,10 +124,10 @@ public function refresh(FeedInterface $feed) {
 
           // Log if feed URL has changed.
           if ($feed->getUrl() != $feed_url) {
-            $this->logger->notice('Updated URL for feed %title to %url.', array('%title' => $feed->label(), '%url' => $feed->getUrl()));
+            $this->logger->notice('Updated URL for feed %title to %url.', ['%title' => $feed->label(), '%url' => $feed->getUrl()]);
           }
 
-          $this->logger->notice('There is new syndicated content from %site.', array('%site' => $feed->label()));
+          $this->logger->notice('There is new syndicated content from %site.', ['%site' => $feed->label()]);
 
           // If there are items on the feed, let enabled processors process them.
           if (!empty($feed->items)) {
diff --git a/core/modules/aggregator/src/Plugin/AggregatorPluginManager.php b/core/modules/aggregator/src/Plugin/AggregatorPluginManager.php
index cd8a6e3e1c7b67566977addb8789405c245c1090..7310987988c98345bfc32fde5914b059d867fc60 100644
--- a/core/modules/aggregator/src/Plugin/AggregatorPluginManager.php
+++ b/core/modules/aggregator/src/Plugin/AggregatorPluginManager.php
@@ -34,16 +34,16 @@ class AggregatorPluginManager extends DefaultPluginManager {
    *   The module handler.
    */
   public function __construct($type, \Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
-    $type_annotations = array(
+    $type_annotations = [
       'fetcher' => 'Drupal\aggregator\Annotation\AggregatorFetcher',
       'parser' => 'Drupal\aggregator\Annotation\AggregatorParser',
       'processor' => 'Drupal\aggregator\Annotation\AggregatorProcessor',
-    );
-    $plugin_interfaces = array(
+    ];
+    $plugin_interfaces = [
       'fetcher' => 'Drupal\aggregator\Plugin\FetcherInterface',
       'parser' => 'Drupal\aggregator\Plugin\ParserInterface',
       'processor' => 'Drupal\aggregator\Plugin\ProcessorInterface',
-    );
+    ];
 
     parent::__construct("Plugin/aggregator/$type", $namespaces, $module_handler, $plugin_interfaces[$type], $type_annotations[$type]);
     $this->setCacheBackend($cache_backend, 'aggregator_' . $type . '_plugins');
diff --git a/core/modules/aggregator/src/Plugin/AggregatorPluginSettingsBase.php b/core/modules/aggregator/src/Plugin/AggregatorPluginSettingsBase.php
index bc59ec5eb286bf9074d925f1400f8feb6d8f8fac..403e6a34900a92259e5d81c712a1c135590ad1c6 100644
--- a/core/modules/aggregator/src/Plugin/AggregatorPluginSettingsBase.php
+++ b/core/modules/aggregator/src/Plugin/AggregatorPluginSettingsBase.php
@@ -25,7 +25,7 @@ abstract class AggregatorPluginSettingsBase extends PluginBase implements Plugin
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array();
+    return [];
   }
 
   /**
@@ -38,7 +38,7 @@ public function validateConfigurationForm(array &$form, FormStateInterface $form
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php b/core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php
index 72e7a30892a8c98994bafff3a2867f6cb67e7dbe..90d8f669dda51d056b910da75b16d4cd0260009b 100644
--- a/core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php
+++ b/core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php
@@ -77,10 +77,10 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   public function defaultConfiguration() {
     // By default, the block will contain 10 feed items.
-    return array(
+    return [
       'block_count' => 10,
       'feed' => NULL,
-    );
+    ];
   }
 
   /**
@@ -96,23 +96,23 @@ protected function blockAccess(AccountInterface $account) {
    */
   public function blockForm($form, FormStateInterface $form_state) {
     $feeds = $this->feedStorage->loadMultiple();
-    $options = array();
+    $options = [];
     foreach ($feeds as $feed) {
       $options[$feed->id()] = $feed->label();
     }
-    $form['feed'] = array(
+    $form['feed'] = [
       '#type' => 'select',
       '#title' => $this->t('Select the feed that should be displayed'),
       '#default_value' => $this->configuration['feed'],
       '#options' => $options,
-    );
+    ];
     $range = range(2, 20);
-    $form['block_count'] = array(
+    $form['block_count'] = [
       '#type' => 'select',
       '#title' => $this->t('Number of news items in block'),
       '#default_value' => $this->configuration['block_count'],
       '#options' => array_combine($range, $range),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/aggregator/src/Plugin/aggregator/fetcher/DefaultFetcher.php b/core/modules/aggregator/src/Plugin/aggregator/fetcher/DefaultFetcher.php
index 99ec48d9ce85ed925475880d146ad965d1cc82b8..91c7ac36ed8573ad1c9103a5ced757419aa240a8 100644
--- a/core/modules/aggregator/src/Plugin/aggregator/fetcher/DefaultFetcher.php
+++ b/core/modules/aggregator/src/Plugin/aggregator/fetcher/DefaultFetcher.php
@@ -112,8 +112,8 @@ public function fetch(FeedInterface $feed) {
       return TRUE;
     }
     catch (RequestException $e) {
-      $this->logger->warning('The feed from %site seems to be broken because of error "%error".', array('%site' => $feed->label(), '%error' => $e->getMessage()));
-      drupal_set_message(t('The feed from %site seems to be broken because of error "%error".', array('%site' => $feed->label(), '%error' => $e->getMessage())), 'warning');
+      $this->logger->warning('The feed from %site seems to be broken because of error "%error".', ['%site' => $feed->label(), '%error' => $e->getMessage()]);
+      drupal_set_message(t('The feed from %site seems to be broken because of error "%error".', ['%site' => $feed->label(), '%error' => $e->getMessage()]), 'warning');
       return FALSE;
     }
   }
diff --git a/core/modules/aggregator/src/Plugin/aggregator/parser/DefaultParser.php b/core/modules/aggregator/src/Plugin/aggregator/parser/DefaultParser.php
index 2fb36823d86182b06f8605c262dc0124eb1126f9..03fa55f01cc9d5ca2de507712a9606e1ef827ece 100644
--- a/core/modules/aggregator/src/Plugin/aggregator/parser/DefaultParser.php
+++ b/core/modules/aggregator/src/Plugin/aggregator/parser/DefaultParser.php
@@ -31,7 +31,7 @@ public function parse(FeedInterface $feed) {
     }
     catch (ExceptionInterface $e) {
       watchdog_exception('aggregator', $e);
-      drupal_set_message(t('The feed from %site seems to be broken because of error "%error".', array('%site' => $feed->label(), '%error' => $e->getMessage())), 'error');
+      drupal_set_message(t('The feed from %site seems to be broken because of error "%error".', ['%site' => $feed->label(), '%error' => $e->getMessage()]), 'error');
 
       return FALSE;
     }
@@ -42,10 +42,10 @@ public function parse(FeedInterface $feed) {
       $feed->setImage($image['uri']);
     }
     // Initialize items array.
-    $feed->items = array();
+    $feed->items = [];
     foreach ($channel as $item) {
       // Reset the parsed item.
-      $parsed_item = array();
+      $parsed_item = [];
       // Move the values to an array as expected by processors.
       $parsed_item['title'] = $item->getTitle();
       $parsed_item['guid'] = $item->getId();
diff --git a/core/modules/aggregator/src/Plugin/aggregator/processor/DefaultProcessor.php b/core/modules/aggregator/src/Plugin/aggregator/processor/DefaultProcessor.php
index 4469c51a6dd3e46a7cdca64f53c82f3ae0afc8f8..525ef34f13ae370ea43100b9ff1b664705495f3d 100644
--- a/core/modules/aggregator/src/Plugin/aggregator/processor/DefaultProcessor.php
+++ b/core/modules/aggregator/src/Plugin/aggregator/processor/DefaultProcessor.php
@@ -105,53 +105,53 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $config = $this->config('aggregator.settings');
     $processors = $config->get('processors');
     $info = $this->getPluginDefinition();
-    $counts = array(3, 5, 10, 15, 20, 25);
+    $counts = [3, 5, 10, 15, 20, 25];
     $items = array_map(function ($count) {
       return $this->formatPlural($count, '1 item', '@count items');
     }, array_combine($counts, $counts));
-    $intervals = array(3600, 10800, 21600, 32400, 43200, 86400, 172800, 259200, 604800, 1209600, 2419200, 4838400, 9676800);
-    $period = array_map(array($this->dateFormatter, 'formatInterval'), array_combine($intervals, $intervals));
+    $intervals = [3600, 10800, 21600, 32400, 43200, 86400, 172800, 259200, 604800, 1209600, 2419200, 4838400, 9676800];
+    $period = array_map([$this->dateFormatter, 'formatInterval'], array_combine($intervals, $intervals));
     $period[AGGREGATOR_CLEAR_NEVER] = t('Never');
 
-    $form['processors'][$info['id']] = array();
+    $form['processors'][$info['id']] = [];
     // Only wrap into details if there is a basic configuration.
     if (isset($form['basic_conf'])) {
-      $form['processors'][$info['id']] = array(
+      $form['processors'][$info['id']] = [
         '#type' => 'details',
         '#title' => t('Default processor settings'),
         '#description' => $info['description'],
         '#open' => in_array($info['id'], $processors),
-      );
+      ];
     }
 
-    $form['processors'][$info['id']]['aggregator_summary_items'] = array(
+    $form['processors'][$info['id']]['aggregator_summary_items'] = [
       '#type' => 'select',
       '#title' => t('Number of items shown in listing pages'),
       '#default_value' => $config->get('source.list_max'),
       '#empty_value' => 0,
       '#options' => $items,
-    );
+    ];
 
-    $form['processors'][$info['id']]['aggregator_clear'] = array(
+    $form['processors'][$info['id']]['aggregator_clear'] = [
       '#type' => 'select',
       '#title' => t('Discard items older than'),
       '#default_value' => $config->get('items.expire'),
       '#options' => $period,
-      '#description' => t('Requires a correctly configured <a href=":cron">cron maintenance task</a>.', array(':cron' => $this->url('system.status'))),
-    );
+      '#description' => t('Requires a correctly configured <a href=":cron">cron maintenance task</a>.', [':cron' => $this->url('system.status')]),
+    ];
 
-    $lengths = array(0, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000);
+    $lengths = [0, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000];
     $options = array_map(function($length) {
       return ($length == 0) ? t('Unlimited') : $this->formatPlural($length, '1 character', '@count characters');
     }, array_combine($lengths, $lengths));
 
-    $form['processors'][$info['id']]['aggregator_teaser_length'] = array(
+    $form['processors'][$info['id']]['aggregator_teaser_length'] = [
       '#type' => 'select',
       '#title' => t('Length of trimmed description'),
       '#default_value' => $config->get('items.teaser_length'),
       '#options' => $options,
       '#description' => t('The maximum number of characters used in the trimmed version of content.'),
-    );
+    ];
     return $form;
   }
 
@@ -185,13 +185,13 @@ public function process(FeedInterface $feed) {
       // we find a duplicate entry, we resolve it and pass along its ID is such
       // that we can update it if needed.
       if (!empty($item['guid'])) {
-        $values = array('fid' => $feed->id(), 'guid' => $item['guid']);
+        $values = ['fid' => $feed->id(), 'guid' => $item['guid']];
       }
       elseif ($item['link'] && $item['link'] != $feed->link && $item['link'] != $feed->url) {
-        $values = array('fid' => $feed->id(), 'link' => $item['link']);
+        $values = ['fid' => $feed->id(), 'link' => $item['link']];
       }
       else {
-        $values = array('fid' => $feed->id(), 'title' => $item['title']);
+        $values = ['fid' => $feed->id(), 'title' => $item['title']];
       }
 
       // Try to load an existing entry.
@@ -199,7 +199,7 @@ public function process(FeedInterface $feed) {
         $entry = reset($entry);
       }
       else {
-        $entry = Item::create(array('langcode' => $feed->language()->getId()));
+        $entry = Item::create(['langcode' => $feed->language()->getId()]);
       }
       if ($item['timestamp']) {
         $entry->setPostedTime($item['timestamp']);
@@ -231,7 +231,7 @@ public function delete(FeedInterface $feed) {
       $this->itemStorage->delete($items);
     }
     // @todo This should be moved out to caller with a different message maybe.
-    drupal_set_message(t('The news items from %site have been deleted.', array('%site' => $feed->label())));
+    drupal_set_message(t('The news items from %site have been deleted.', ['%site' => $feed->label()]));
   }
 
   /**
diff --git a/core/modules/aggregator/src/Plugin/migrate/source/AggregatorFeed.php b/core/modules/aggregator/src/Plugin/migrate/source/AggregatorFeed.php
index e623e5fd0bab86033fd2a54a9438645b366e28fe..59244d4e4af5e76006c10510f89d4e8afa1b257e 100644
--- a/core/modules/aggregator/src/Plugin/migrate/source/AggregatorFeed.php
+++ b/core/modules/aggregator/src/Plugin/migrate/source/AggregatorFeed.php
@@ -26,7 +26,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'fid' => $this->t('The feed ID.'),
       'title' => $this->t('Title of the feed.'),
       'url' => $this->t('URL to the feed.'),
@@ -38,7 +38,7 @@ public function fields() {
       'etag' => $this->t('Entity tag HTTP response header.'),
       'modified' => $this->t('When the feed was last modified.'),
       'block' => $this->t("Number of items to display in the feed's block."),
-    );
+    ];
     if ($this->getModuleSchemaVersion('system') >= 7000) {
       $fields['queued'] = $this->t('Time when this feed was queued for refresh, 0 if not queued.');
     }
diff --git a/core/modules/aggregator/src/Plugin/migrate/source/AggregatorItem.php b/core/modules/aggregator/src/Plugin/migrate/source/AggregatorItem.php
index fc1c5c6c71ff7af448f5849c0dcc5b9d513a52e0..428c558ea7c48e04f295d37a191550dc1ca72767 100644
--- a/core/modules/aggregator/src/Plugin/migrate/source/AggregatorItem.php
+++ b/core/modules/aggregator/src/Plugin/migrate/source/AggregatorItem.php
@@ -27,7 +27,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'iid' => $this->t('Primary Key: Unique ID for feed item.'),
       'fid' => $this->t('The {aggregator_feed}.fid to which this item belongs.'),
       'title' => $this->t('Title of the feed item.'),
@@ -36,7 +36,7 @@ public function fields() {
       'description' => $this->t('Body of the feed item.'),
       'timestamp' => $this->t('Post date of feed item, as a Unix timestamp.'),
       'guid' => $this->t('Unique identifier for the feed item.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/aggregator/src/Plugin/views/argument/Fid.php b/core/modules/aggregator/src/Plugin/views/argument/Fid.php
index bb912e1ce6462fad692c4d37721eb76f1cb59d95..90564d5bb64064405dad4f1d62206bca1d1cb408 100644
--- a/core/modules/aggregator/src/Plugin/views/argument/Fid.php
+++ b/core/modules/aggregator/src/Plugin/views/argument/Fid.php
@@ -50,7 +50,7 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function titleQuery() {
-    $titles = array();
+    $titles = [];
 
     $feeds = $this->entityManager->getStorage('aggregator_feed')->loadMultiple($this->value);
     foreach ($feeds as $feed) {
diff --git a/core/modules/aggregator/src/Plugin/views/argument/Iid.php b/core/modules/aggregator/src/Plugin/views/argument/Iid.php
index 9468c9868c531d145465b643f77f47cbd0c0f912..44b4569779eb1cb1c7b5f861c150d40a04c3873c 100644
--- a/core/modules/aggregator/src/Plugin/views/argument/Iid.php
+++ b/core/modules/aggregator/src/Plugin/views/argument/Iid.php
@@ -50,7 +50,7 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function titleQuery() {
-    $titles = array();
+    $titles = [];
 
     $items = $this->entityManager->getStorage('aggregator_item')->loadMultiple($this->value);
     foreach ($items as $feed) {
diff --git a/core/modules/aggregator/src/Plugin/views/row/Rss.php b/core/modules/aggregator/src/Plugin/views/row/Rss.php
index ef46466490cc9788a48b4fd3b3d62d3f7544e99a..464a28592e4d25cbba8e05e5c3ca0b18ed98c365 100644
--- a/core/modules/aggregator/src/Plugin/views/row/Rss.php
+++ b/core/modules/aggregator/src/Plugin/views/row/Rss.php
@@ -48,31 +48,31 @@ public function render($row) {
       $item->{$name} = $field->value;
     }
 
-    $item->elements = array(
-      array(
+    $item->elements = [
+      [
         'key' => 'pubDate',
         // views_view_row_rss takes care about the escaping.
         'value' => gmdate('r', $entity->timestamp->value),
-      ),
-      array(
+      ],
+      [
         'key' => 'dc:creator',
         // views_view_row_rss takes care about the escaping.
         'value' => $entity->author->value,
-      ),
-      array(
+      ],
+      [
         'key' => 'guid',
         // views_view_row_rss takes care about the escaping.
         'value' => $entity->guid->value,
-        'attributes' => array('isPermaLink' => 'false'),
-      ),
-    );
+        'attributes' => ['isPermaLink' => 'false'],
+      ],
+    ];
 
-    $build = array(
+    $build = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#row' => $item,
-    );
+    ];
     return $build;
   }
 
diff --git a/core/modules/aggregator/src/Tests/AddFeedTest.php b/core/modules/aggregator/src/Tests/AddFeedTest.php
index b7ffe5fbc718d6b13d61cc32d9b02ecaf8357e9b..4dfeb955720aefdcbb6336b3a1e816cd4c75dd7f 100644
--- a/core/modules/aggregator/src/Tests/AddFeedTest.php
+++ b/core/modules/aggregator/src/Tests/AddFeedTest.php
@@ -39,8 +39,8 @@ public function testAddFeed() {
       'refresh' => '900',
     ];
     $this->drupalPostForm('aggregator/sources/add', $edit, t('Save'));
-    $this->assertRaw(t('A feed named %feed already exists. Enter a unique title.', array('%feed' => $feed->label())));
-    $this->assertRaw(t('A feed with this URL %url already exists. Enter a unique URL.', array('%url' => $feed->getUrl())));
+    $this->assertRaw(t('A feed named %feed already exists. Enter a unique title.', ['%feed' => $feed->label()]));
+    $this->assertRaw(t('A feed with this URL %url already exists. Enter a unique URL.', ['%url' => $feed->getUrl()]));
 
     // Delete feed.
     $this->deleteFeed($feed);
diff --git a/core/modules/aggregator/src/Tests/AggregatorAdminTest.php b/core/modules/aggregator/src/Tests/AggregatorAdminTest.php
index 487e0ef921cd346d223f00cc86aa26717499c1bf..3d09bbcac0ad67b653a83906e439697bf2888571 100644
--- a/core/modules/aggregator/src/Tests/AggregatorAdminTest.php
+++ b/core/modules/aggregator/src/Tests/AggregatorAdminTest.php
@@ -22,7 +22,7 @@ public function testSettingsPage() {
     $this->assertText('Test processor');
 
     // Set new values and enable test plugins.
-    $edit = array(
+    $edit = [
       'aggregator_allowed_html_tags' => '<a>',
       'aggregator_summary_items' => 10,
       'aggregator_clear' => 3600,
@@ -30,27 +30,27 @@ public function testSettingsPage() {
       'aggregator_fetcher' => 'aggregator_test_fetcher',
       'aggregator_parser' => 'aggregator_test_parser',
       'aggregator_processors[aggregator_test_processor]' => 'aggregator_test_processor',
-    );
+    ];
     $this->drupalPostForm('admin/config/services/aggregator/settings', $edit, t('Save configuration'));
     $this->assertText(t('The configuration options have been saved.'));
 
     foreach ($edit as $name => $value) {
-      $this->assertFieldByName($name, $value, format_string('"@name" has correct default value.', array('@name' => $name)));
+      $this->assertFieldByName($name, $value, format_string('"@name" has correct default value.', ['@name' => $name]));
     }
 
     // Check for our test processor settings form.
     $this->assertText(t('Dummy length setting'));
     // Change its value to ensure that settingsSubmit is called.
-    $edit = array(
+    $edit = [
       'dummy_length' => 100,
-    );
+    ];
     $this->drupalPostForm('admin/config/services/aggregator/settings', $edit, t('Save configuration'));
     $this->assertText(t('The configuration options have been saved.'));
     $this->assertFieldByName('dummy_length', 100, '"dummy_length" has correct default value.');
 
     // Make sure settings form is still accessible even after uninstalling a module
     // that provides the selected plugins.
-    $this->container->get('module_installer')->uninstall(array('aggregator_test'));
+    $this->container->get('module_installer')->uninstall(['aggregator_test']);
     $this->resetAll();
     $this->drupalGet('admin/config/services/aggregator/settings');
     $this->assertResponse(200);
diff --git a/core/modules/aggregator/src/Tests/AggregatorCronTest.php b/core/modules/aggregator/src/Tests/AggregatorCronTest.php
index 34a4cb930ce91dadab366441e57d65ed8caf61e9..9ebb2d25c00c36563b9913f7dffcb8240e8b6ef7 100644
--- a/core/modules/aggregator/src/Tests/AggregatorCronTest.php
+++ b/core/modules/aggregator/src/Tests/AggregatorCronTest.php
@@ -16,30 +16,30 @@ public function testCron() {
     $this->createSampleNodes();
     $feed = $this->createFeed();
     $this->cronRun();
-    $this->assertEqual(5, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField());
+    $this->assertEqual(5, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField());
     $this->deleteFeedItems($feed);
-    $this->assertEqual(0, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField());
+    $this->assertEqual(0, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField());
     $this->cronRun();
-    $this->assertEqual(5, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField());
+    $this->assertEqual(5, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField());
 
     // Test feed locking when queued for update.
     $this->deleteFeedItems($feed);
     db_update('aggregator_feed')
       ->condition('fid', $feed->id())
-      ->fields(array(
+      ->fields([
         'queued' => REQUEST_TIME,
-      ))
+      ])
       ->execute();
     $this->cronRun();
-    $this->assertEqual(0, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField());
+    $this->assertEqual(0, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField());
     db_update('aggregator_feed')
       ->condition('fid', $feed->id())
-      ->fields(array(
+      ->fields([
         'queued' => 0,
-      ))
+      ])
       ->execute();
     $this->cronRun();
-    $this->assertEqual(5, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField());
+    $this->assertEqual(5, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField());
   }
 
 }
diff --git a/core/modules/aggregator/src/Tests/AggregatorRenderingTest.php b/core/modules/aggregator/src/Tests/AggregatorRenderingTest.php
index 888f1da5676166fcf580a11b4e0666ec34315ba8..de7e401058b23eb403ab9afc19fe3fdb15c829fb 100644
--- a/core/modules/aggregator/src/Tests/AggregatorRenderingTest.php
+++ b/core/modules/aggregator/src/Tests/AggregatorRenderingTest.php
@@ -17,7 +17,7 @@ class AggregatorRenderingTest extends AggregatorTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'test_page_test');
+  public static $modules = ['block', 'test_page_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -35,15 +35,15 @@ public function testBlockLinks() {
     $this->updateFeedItems($feed, $this->getDefaultFeedItemCount());
 
     // Need admin user to be able to access block admin.
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'administer blocks',
       'access administration pages',
       'administer news feeds',
       'access news feeds',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
 
-    $block = $this->drupalPlaceBlock("aggregator_feed_block", array('label' => 'feed-' . $feed->label()));
+    $block = $this->drupalPlaceBlock("aggregator_feed_block", ['label' => 'feed-' . $feed->label()]);
 
     // Configure the feed that should be displayed.
     $block->getPlugin()->setConfigurationValue('feed', $feed->id());
@@ -56,20 +56,20 @@ public function testBlockLinks() {
 
     // Confirm items appear as links.
     $items = $this->container->get('entity.manager')->getStorage('aggregator_item')->loadByFeed($feed->id(), 1);
-    $links = $this->xpath('//a[@href = :href]', array(':href' => reset($items)->getLink()));
+    $links = $this->xpath('//a[@href = :href]', [':href' => reset($items)->getLink()]);
     $this->assert(isset($links[0]), 'Item link found.');
 
     // Find the expected read_more link.
     $href = $feed->url();
-    $links = $this->xpath('//a[@href = :href]', array(':href' => $href));
-    $this->assert(isset($links[0]), format_string('Link to href %href found.', array('%href' => $href)));
+    $links = $this->xpath('//a[@href = :href]', [':href' => $href]);
+    $this->assert(isset($links[0]), format_string('Link to href %href found.', ['%href' => $href]));
     $cache_tags_header = $this->drupalGetHeader('X-Drupal-Cache-Tags');
     $cache_tags = explode(' ', $cache_tags_header);
     $this->assertTrue(in_array('aggregator_feed:' . $feed->id(), $cache_tags));
 
     // Visit that page.
     $this->drupalGet($feed->urlInfo()->getInternalPath());
-    $correct_titles = $this->xpath('//h1[normalize-space(text())=:title]', array(':title' => $feed->label()));
+    $correct_titles = $this->xpath('//h1[normalize-space(text())=:title]', [':title' => $feed->label()]);
     $this->assertFalse(empty($correct_titles), 'Aggregator feed page is available and has the correct title.');
     $cache_tags = explode(' ', $this->drupalGetHeader('X-Drupal-Cache-Tags'));
     $this->assertTrue(in_array('aggregator_feed:' . $feed->id(), $cache_tags));
@@ -103,18 +103,18 @@ public function testFeedPage() {
 
     // Check for presence of an aggregator pager.
     $this->drupalGet('aggregator');
-    $elements = $this->xpath("//ul[contains(@class, :class)]", array(':class' => 'pager__items'));
+    $elements = $this->xpath("//ul[contains(@class, :class)]", [':class' => 'pager__items']);
     $this->assertTrue(!empty($elements), 'Individual source page contains a pager.');
 
     // Check for sources page title.
     $this->drupalGet('aggregator/sources');
-    $titles = $this->xpath('//h1[normalize-space(text())=:title]', array(':title' => 'Sources'));
+    $titles = $this->xpath('//h1[normalize-space(text())=:title]', [':title' => 'Sources']);
     $this->assertTrue(!empty($titles), 'Source page contains correct title.');
 
     // Find the expected read_more link on the sources page.
     $href = $feed->url();
-    $links = $this->xpath('//a[@href = :href]', array(':href' => $href));
-    $this->assertTrue(isset($links[0]), SafeMarkup::format('Link to href %href found.', array('%href' => $href)));
+    $links = $this->xpath('//a[@href = :href]', [':href' => $href]);
+    $this->assertTrue(isset($links[0]), SafeMarkup::format('Link to href %href found.', ['%href' => $href]));
     $cache_tags_header = $this->drupalGetHeader('X-Drupal-Cache-Tags');
     $cache_tags = explode(' ', $cache_tags_header);
     $this->assertTrue(in_array('aggregator_feed:' . $feed->id(), $cache_tags));
@@ -139,7 +139,7 @@ public function testFeedPage() {
 
     // Check for the presence of a pager.
     $this->drupalGet('aggregator/sources/' . $feed->id());
-    $elements = $this->xpath("//ul[contains(@class, :class)]", array(':class' => 'pager__items'));
+    $elements = $this->xpath("//ul[contains(@class, :class)]", [':class' => 'pager__items']);
     $this->assertTrue(!empty($elements), 'Individual source page contains a pager.');
     $cache_tags = explode(' ', $this->drupalGetHeader('X-Drupal-Cache-Tags'));
     $this->assertTrue(in_array('aggregator_feed:' . $feed->id(), $cache_tags));
diff --git a/core/modules/aggregator/src/Tests/AggregatorTestBase.php b/core/modules/aggregator/src/Tests/AggregatorTestBase.php
index 35bd9a968924fd27b6c5fa7ba1d5a10de543c3e1..f42248975ae9f27eb4b3bc29f67033567575781b 100644
--- a/core/modules/aggregator/src/Tests/AggregatorTestBase.php
+++ b/core/modules/aggregator/src/Tests/AggregatorTestBase.php
@@ -37,10 +37,10 @@ protected function setUp() {
 
     // Create an Article node type.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
 
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'administer news feeds', 'access news feeds', 'create article content'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer news feeds', 'access news feeds', 'create article content']);
     $this->drupalLogin($this->adminUser);
     $this->drupalPlaceBlock('local_tasks_block');
   }
@@ -61,16 +61,16 @@ protected function setUp() {
    *
    * @see getFeedEditArray()
    */
-  public function createFeed($feed_url = NULL, array $edit = array()) {
+  public function createFeed($feed_url = NULL, array $edit = []) {
     $edit = $this->getFeedEditArray($feed_url, $edit);
     $this->drupalPostForm('aggregator/sources/add', $edit, t('Save'));
-    $this->assertText(t('The feed @name has been added.', array('@name' => $edit['title[0][value]'])), format_string('The feed @name has been added.', array('@name' => $edit['title[0][value]'])));
+    $this->assertText(t('The feed @name has been added.', ['@name' => $edit['title[0][value]']]), format_string('The feed @name has been added.', ['@name' => $edit['title[0][value]']]));
 
     // Verify that the creation message contains a link to a feed.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'aggregator/sources/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'aggregator/sources/']);
     $this->assert(isset($view_link), 'The message area contains a link to a feed');
 
-    $fid = db_query("SELECT fid FROM {aggregator_feed} WHERE title = :title AND url = :url", array(':title' => $edit['title[0][value]'], ':url' => $edit['url[0][value]']))->fetchField();
+    $fid = db_query("SELECT fid FROM {aggregator_feed} WHERE title = :title AND url = :url", [':title' => $edit['title[0][value]'], ':url' => $edit['url[0][value]']])->fetchField();
     $this->assertTrue(!empty($fid), 'The feed found in database.');
     return Feed::load($fid);
   }
@@ -82,8 +82,8 @@ public function createFeed($feed_url = NULL, array $edit = array()) {
    *   Feed object representing the feed.
    */
   public function deleteFeed(FeedInterface $feed) {
-    $this->drupalPostForm('aggregator/sources/' . $feed->id() . '/delete', array(), t('Delete'));
-    $this->assertRaw(t('The feed %title has been deleted.', array('%title' => $feed->label())), 'Feed deleted successfully.');
+    $this->drupalPostForm('aggregator/sources/' . $feed->id() . '/delete', [], t('Delete'));
+    $this->assertRaw(t('The feed %title has been deleted.', ['%title' => $feed->label()]), 'Feed deleted successfully.');
   }
 
   /**
@@ -98,19 +98,19 @@ public function deleteFeed(FeedInterface $feed) {
    * @return array
    *   A feed array.
    */
-  public function getFeedEditArray($feed_url = NULL, array $edit = array()) {
+  public function getFeedEditArray($feed_url = NULL, array $edit = []) {
     $feed_name = $this->randomMachineName(10);
     if (!$feed_url) {
-      $feed_url = \Drupal::url('view.frontpage.feed_1', array(), array(
-        'query' => array('feed' => $feed_name),
+      $feed_url = \Drupal::url('view.frontpage.feed_1', [], [
+        'query' => ['feed' => $feed_name],
         'absolute' => TRUE,
-      ));
+      ]);
     }
-    $edit += array(
+    $edit += [
       'title[0][value]' => $feed_name,
       'url[0][value]' => $feed_url,
       'refresh' => '900',
-    );
+    ];
     return $edit;
   }
 
@@ -126,19 +126,19 @@ public function getFeedEditArray($feed_url = NULL, array $edit = array()) {
    * @return \Drupal\aggregator\FeedInterface
    *   A feed object.
    */
-  public function getFeedEditObject($feed_url = NULL, array $values = array()) {
+  public function getFeedEditObject($feed_url = NULL, array $values = []) {
     $feed_name = $this->randomMachineName(10);
     if (!$feed_url) {
-      $feed_url = \Drupal::url('view.frontpage.feed_1', array(
-        'query' => array('feed' => $feed_name),
+      $feed_url = \Drupal::url('view.frontpage.feed_1', [
+        'query' => ['feed' => $feed_name],
         'absolute' => TRUE,
-      ));
+      ]);
     }
-    $values += array(
+    $values += [
       'title' => $feed_name,
       'url' => $feed_url,
       'refresh' => '900',
-    );
+    ];
     return Feed::create($values);
   }
 
@@ -168,7 +168,7 @@ public function getDefaultFeedItemCount() {
   public function updateFeedItems(FeedInterface $feed, $expected_count = NULL) {
     // First, let's ensure we can get to the rss xml.
     $this->drupalGet($feed->getUrl());
-    $this->assertResponse(200, format_string(':url is reachable.', array(':url' => $feed->getUrl())));
+    $this->assertResponse(200, format_string(':url is reachable.', [':url' => $feed->getUrl()]));
 
     // Attempt to access the update link directly without an access token.
     $this->drupalGet('admin/config/services/aggregator/update/' . $feed->id());
@@ -179,15 +179,15 @@ public function updateFeedItems(FeedInterface $feed, $expected_count = NULL) {
     $this->clickLink('Update items');
 
     // Ensure we have the right number of items.
-    $result = db_query('SELECT iid FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()));
-    $feed->items = array();
+    $result = db_query('SELECT iid FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()]);
+    $feed->items = [];
     foreach ($result as $item) {
       $feed->items[] = $item->iid;
     }
 
     if ($expected_count !== NULL) {
       $feed->item_count = count($feed->items);
-      $this->assertEqual($expected_count, $feed->item_count, format_string('Total items in feed equal to the total items in database (@val1 != @val2)', array('@val1' => $expected_count, '@val2' => $feed->item_count)));
+      $this->assertEqual($expected_count, $feed->item_count, format_string('Total items in feed equal to the total items in database (@val1 != @val2)', ['@val1' => $expected_count, '@val2' => $feed->item_count]));
     }
   }
 
@@ -198,8 +198,8 @@ public function updateFeedItems(FeedInterface $feed, $expected_count = NULL) {
    *   Feed object representing the feed.
    */
   public function deleteFeedItems(FeedInterface $feed) {
-    $this->drupalPostForm('admin/config/services/aggregator/delete/' . $feed->id(), array(), t('Delete items'));
-    $this->assertRaw(t('The news items from %title have been deleted.', array('%title' => $feed->label())), 'Feed items deleted.');
+    $this->drupalPostForm('admin/config/services/aggregator/delete/' . $feed->id(), [], t('Delete items'));
+    $this->assertRaw(t('The news items from %title have been deleted.', ['%title' => $feed->label()]), 'Feed items deleted.');
   }
 
   /**
@@ -212,10 +212,10 @@ public function deleteFeedItems(FeedInterface $feed) {
    */
   public function updateAndDelete(FeedInterface $feed, $expected_count) {
     $this->updateFeedItems($feed, $expected_count);
-    $count = db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField();
+    $count = db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField();
     $this->assertTrue($count);
     $this->deleteFeedItems($feed);
-    $count = db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField();
+    $count = db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField();
     $this->assertTrue($count == 0);
   }
 
@@ -231,7 +231,7 @@ public function updateAndDelete(FeedInterface $feed, $expected_count) {
    *   TRUE if feed is unique.
    */
   public function uniqueFeed($feed_name, $feed_url) {
-    $result = db_query("SELECT COUNT(*) FROM {aggregator_feed} WHERE title = :title AND url = :url", array(':title' => $feed_name, ':url' => $feed_url))->fetchField();
+    $result = db_query("SELECT COUNT(*) FROM {aggregator_feed} WHERE title = :title AND url = :url", [':title' => $feed_name, ':url' => $feed_url])->fetchField();
     return (1 == $result);
   }
 
@@ -358,7 +358,7 @@ public function getHtmlEntitiesSample() {
   public function createSampleNodes($count = 5) {
     // Post $count article nodes.
     for ($i = 0; $i < $count; $i++) {
-      $edit = array();
+      $edit = [];
       $edit['title[0][value]'] = $this->randomMachineName();
       $edit['body[0][value]'] = $this->randomMachineName();
       $this->drupalPostForm('node/add/article', $edit, t('Save'));
@@ -372,10 +372,10 @@ public function enableTestPlugins() {
     $this->config('aggregator.settings')
       ->set('fetcher', 'aggregator_test_fetcher')
       ->set('parser', 'aggregator_test_parser')
-      ->set('processors', array(
+      ->set('processors', [
         'aggregator_test_processor' => 'aggregator_test_processor',
         'aggregator' => 'aggregator',
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/aggregator/src/Tests/FeedAdminDisplayTest.php b/core/modules/aggregator/src/Tests/FeedAdminDisplayTest.php
index 0324e3b9a55ddef63f357fbe676bdaa3f64be1a9..0dbb872b56811e9082e0593aac03efae865790da 100644
--- a/core/modules/aggregator/src/Tests/FeedAdminDisplayTest.php
+++ b/core/modules/aggregator/src/Tests/FeedAdminDisplayTest.php
@@ -14,7 +14,7 @@ class FeedAdminDisplayTest extends AggregatorTestBase {
    */
   public function testFeedUpdateFields() {
     // Create scheduled feed.
-    $scheduled_feed = $this->createFeed(NULL, array('refresh' => '900'));
+    $scheduled_feed = $this->createFeed(NULL, ['refresh' => '900']);
 
     $this->drupalGet('admin/config/services/aggregator');
     $this->assertResponse(200, 'Aggregator feed overview page exists.');
@@ -40,7 +40,7 @@ public function testFeedUpdateFields() {
     $this->deleteFeed($scheduled_feed);
 
     // Create non-scheduled feed.
-    $non_scheduled_feed = $this->createFeed(NULL, array('refresh' => '0'));
+    $non_scheduled_feed = $this->createFeed(NULL, ['refresh' => '0']);
 
     $this->drupalGet('admin/config/services/aggregator');
     // The non scheduled feed shows that it has not been updated yet.
diff --git a/core/modules/aggregator/src/Tests/FeedLanguageTest.php b/core/modules/aggregator/src/Tests/FeedLanguageTest.php
index af8335e10e0a5b09468ba1fa17efcf757e5a88bb..98d04fa5c1319e5a9ba25460311fd4135f65f704 100644
--- a/core/modules/aggregator/src/Tests/FeedLanguageTest.php
+++ b/core/modules/aggregator/src/Tests/FeedLanguageTest.php
@@ -16,14 +16,14 @@ class FeedLanguageTest extends AggregatorTestBase {
    *
    * @var array
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * List of langcodes.
    *
    * @var string[]
    */
-  protected $langcodes = array();
+  protected $langcodes = [];
 
   /**
    * {@inheritdoc}
@@ -32,12 +32,12 @@ protected function setUp() {
     parent::setUp();
 
     // Create test languages.
-    $this->langcodes = array(ConfigurableLanguage::load('en'));
+    $this->langcodes = [ConfigurableLanguage::load('en')];
     for ($i = 1; $i < 3; ++$i) {
-      $language = ConfigurableLanguage::create(array(
+      $language = ConfigurableLanguage::create([
         'id' => 'l' . $i,
         'label' => $this->randomString(),
-      ));
+      ]);
       $language->save();
       $this->langcodes[$i] = $language->id();
     }
@@ -57,10 +57,10 @@ public function testFeedLanguage() {
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
 
     /** @var \Drupal\aggregator\FeedInterface[] $feeds */
-    $feeds = array();
+    $feeds = [];
     // Create feeds.
-    $feeds[1] = $this->createFeed(NULL, array('langcode[0][value]' => $this->langcodes[1]));
-    $feeds[2] = $this->createFeed(NULL, array('langcode[0][value]' => $this->langcodes[2]));
+    $feeds[1] = $this->createFeed(NULL, ['langcode[0][value]' => $this->langcodes[1]]);
+    $feeds[2] = $this->createFeed(NULL, ['langcode[0][value]' => $this->langcodes[2]]);
 
     // Make sure that the language has been assigned.
     $this->assertEqual($feeds[1]->language()->getId(), $this->langcodes[1]);
@@ -74,7 +74,7 @@ public function testFeedLanguage() {
     // the one from the feed.
     foreach ($feeds as $feed) {
       /** @var \Drupal\aggregator\ItemInterface[] $items */
-      $items = entity_load_multiple_by_properties('aggregator_item', array('fid' => $feed->id()));
+      $items = entity_load_multiple_by_properties('aggregator_item', ['fid' => $feed->id()]);
       $this->assertTrue(count($items) > 0, 'Feed items were created.');
       foreach ($items as $item) {
         $this->assertEqual($item->language()->getId(), $feed->language()->getId());
diff --git a/core/modules/aggregator/src/Tests/UpdateFeedItemTest.php b/core/modules/aggregator/src/Tests/UpdateFeedItemTest.php
index ae78205bcd5963392276dfaeb315f4b378f7aca4..67e96f17269cca612af6f495d8815bbb991dba1e 100644
--- a/core/modules/aggregator/src/Tests/UpdateFeedItemTest.php
+++ b/core/modules/aggregator/src/Tests/UpdateFeedItemTest.php
@@ -26,47 +26,47 @@ public function testUpdateFeedItem() {
     $this->deleteFeed($feed);
 
     // Test updating feed items without valid timestamp information.
-    $edit = array(
+    $edit = [
       'title[0][value]' => "Feed without publish timestamp",
       'url[0][value]' => $this->getRSS091Sample(),
-    );
+    ];
 
     $this->drupalGet($edit['url[0][value]']);
     $this->assertResponse(200);
 
     $this->drupalPostForm('aggregator/sources/add', $edit, t('Save'));
-    $this->assertText(t('The feed @name has been added.', array('@name' => $edit['title[0][value]'])), format_string('The feed @name has been added.', array('@name' => $edit['title[0][value]'])));
+    $this->assertText(t('The feed @name has been added.', ['@name' => $edit['title[0][value]']]), format_string('The feed @name has been added.', ['@name' => $edit['title[0][value]']]));
 
     // Verify that the creation message contains a link to a feed.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'aggregator/sources/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'aggregator/sources/']);
     $this->assert(isset($view_link), 'The message area contains a link to a feed');
 
-    $fid = db_query("SELECT fid FROM {aggregator_feed} WHERE url = :url", array(':url' => $edit['url[0][value]']))->fetchField();
+    $fid = db_query("SELECT fid FROM {aggregator_feed} WHERE url = :url", [':url' => $edit['url[0][value]']])->fetchField();
     $feed = Feed::load($fid);
 
     $feed->refreshItems();
-    $before = db_query('SELECT timestamp FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField();
+    $before = db_query('SELECT timestamp FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField();
 
     // Sleep for 3 second.
     sleep(3);
     db_update('aggregator_feed')
       ->condition('fid', $feed->id())
-      ->fields(array(
+      ->fields([
         'checked' => 0,
         'hash' => '',
         'etag' => '',
         'modified' => 0,
-      ))
+      ])
       ->execute();
     $feed->refreshItems();
 
-    $after = db_query('SELECT timestamp FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField();
-    $this->assertTrue($before === $after, format_string('Publish timestamp of feed item was not updated (@before === @after)', array('@before' => $before, '@after' => $after)));
+    $after = db_query('SELECT timestamp FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField();
+    $this->assertTrue($before === $after, format_string('Publish timestamp of feed item was not updated (@before === @after)', ['@before' => $before, '@after' => $after]));
 
     // Make sure updating items works even after uninstalling a module
     // that provides the selected plugins.
     $this->enableTestPlugins();
-    $this->container->get('module_installer')->uninstall(array('aggregator_test'));
+    $this->container->get('module_installer')->uninstall(['aggregator_test']);
     $this->updateFeedItems($feed);
     $this->assertResponse(200);
   }
diff --git a/core/modules/aggregator/src/Tests/UpdateFeedTest.php b/core/modules/aggregator/src/Tests/UpdateFeedTest.php
index 8c797a5e828532379571097afd90945a64bf7a26..d2308744c2425d535eafec1ab2aa1bad8b54f335 100644
--- a/core/modules/aggregator/src/Tests/UpdateFeedTest.php
+++ b/core/modules/aggregator/src/Tests/UpdateFeedTest.php
@@ -12,7 +12,7 @@ class UpdateFeedTest extends AggregatorTestBase {
    * Creates a feed and attempts to update it.
    */
   public function testUpdateFeed() {
-    $remaining_fields = array('title[0][value]', 'url[0][value]', '');
+    $remaining_fields = ['title[0][value]', 'url[0][value]', ''];
     foreach ($remaining_fields as $same_field) {
       $feed = $this->createFeed();
 
@@ -24,10 +24,10 @@ public function testUpdateFeed() {
         $edit[$same_field] = $feed->{$same_field}->value;
       }
       $this->drupalPostForm('aggregator/sources/' . $feed->id() . '/configure', $edit, t('Save'));
-      $this->assertText(t('The feed @name has been updated.', array('@name' => $edit['title[0][value]'])), format_string('The feed %name has been updated.', array('%name' => $edit['title[0][value]'])));
+      $this->assertText(t('The feed @name has been updated.', ['@name' => $edit['title[0][value]']]), format_string('The feed %name has been updated.', ['%name' => $edit['title[0][value]']]));
 
       // Verify that the creation message contains a link to a feed.
-      $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'aggregator/sources/'));
+      $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'aggregator/sources/']);
       $this->assert(isset($view_link), 'The message area contains a link to a feed');
 
       // Check feed data.
diff --git a/core/modules/aggregator/tests/modules/aggregator_test/src/Plugin/aggregator/processor/TestProcessor.php b/core/modules/aggregator/tests/modules/aggregator_test/src/Plugin/aggregator/processor/TestProcessor.php
index 2f73c5f4af67baf02e18f1214a58f4b9b7a914d6..294697a2bc28db06be8117285f2c9315d9d559e6 100644
--- a/core/modules/aggregator/tests/modules/aggregator_test/src/Plugin/aggregator/processor/TestProcessor.php
+++ b/core/modules/aggregator/tests/modules/aggregator_test/src/Plugin/aggregator/processor/TestProcessor.php
@@ -75,20 +75,20 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $processors = $this->config('aggregator.settings')->get('processors');
     $info = $this->getPluginDefinition();
 
-    $form['processors'][$info['id']] = array(
+    $form['processors'][$info['id']] = [
       '#type' => 'details',
       '#title' => t('Test processor settings'),
       '#description' => $info['description'],
       '#open' => in_array($info['id'], $processors),
-    );
+    ];
     // Add some dummy settings to verify settingsForm is called.
-    $form['processors'][$info['id']]['dummy_length'] = array(
+    $form['processors'][$info['id']]['dummy_length'] = [
       '#title' => t('Dummy length setting'),
       '#type' => 'number',
       '#min' => 1,
       '#max' => 1000,
       '#default_value' => $this->configuration['items']['dummy_length'],
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/aggregator/tests/src/Functional/AggregatorTestBase.php b/core/modules/aggregator/tests/src/Functional/AggregatorTestBase.php
index 9a07135244b94fe66e9eef5907381b546b270bea..ddd98bb82f48fce4426fed8be7376a45e5abef8f 100644
--- a/core/modules/aggregator/tests/src/Functional/AggregatorTestBase.php
+++ b/core/modules/aggregator/tests/src/Functional/AggregatorTestBase.php
@@ -34,10 +34,10 @@ protected function setUp() {
 
     // Create an Article node type.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
 
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'administer news feeds', 'access news feeds', 'create article content'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer news feeds', 'access news feeds', 'create article content']);
     $this->drupalLogin($this->adminUser);
     $this->drupalPlaceBlock('local_tasks_block');
   }
@@ -58,16 +58,16 @@ protected function setUp() {
    *
    * @see getFeedEditArray()
    */
-  public function createFeed($feed_url = NULL, array $edit = array()) {
+  public function createFeed($feed_url = NULL, array $edit = []) {
     $edit = $this->getFeedEditArray($feed_url, $edit);
     $this->drupalPostForm('aggregator/sources/add', $edit, t('Save'));
-    $this->assertText(t('The feed @name has been added.', array('@name' => $edit['title[0][value]'])), format_string('The feed @name has been added.', array('@name' => $edit['title[0][value]'])));
+    $this->assertText(t('The feed @name has been added.', ['@name' => $edit['title[0][value]']]), format_string('The feed @name has been added.', ['@name' => $edit['title[0][value]']]));
 
     // Verify that the creation message contains a link to a feed.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'aggregator/sources/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'aggregator/sources/']);
     $this->assert(isset($view_link), 'The message area contains a link to a feed');
 
-    $fid = db_query("SELECT fid FROM {aggregator_feed} WHERE title = :title AND url = :url", array(':title' => $edit['title[0][value]'], ':url' => $edit['url[0][value]']))->fetchField();
+    $fid = db_query("SELECT fid FROM {aggregator_feed} WHERE title = :title AND url = :url", [':title' => $edit['title[0][value]'], ':url' => $edit['url[0][value]']])->fetchField();
     $this->assertTrue(!empty($fid), 'The feed found in database.');
     return Feed::load($fid);
   }
@@ -79,8 +79,8 @@ public function createFeed($feed_url = NULL, array $edit = array()) {
    *   Feed object representing the feed.
    */
   public function deleteFeed(FeedInterface $feed) {
-    $this->drupalPostForm('aggregator/sources/' . $feed->id() . '/delete', array(), t('Delete'));
-    $this->assertRaw(t('The feed %title has been deleted.', array('%title' => $feed->label())), 'Feed deleted successfully.');
+    $this->drupalPostForm('aggregator/sources/' . $feed->id() . '/delete', [], t('Delete'));
+    $this->assertRaw(t('The feed %title has been deleted.', ['%title' => $feed->label()]), 'Feed deleted successfully.');
   }
 
   /**
@@ -95,19 +95,19 @@ public function deleteFeed(FeedInterface $feed) {
    * @return array
    *   A feed array.
    */
-  public function getFeedEditArray($feed_url = NULL, array $edit = array()) {
+  public function getFeedEditArray($feed_url = NULL, array $edit = []) {
     $feed_name = $this->randomMachineName(10);
     if (!$feed_url) {
-      $feed_url = \Drupal::url('view.frontpage.feed_1', array(), array(
-        'query' => array('feed' => $feed_name),
+      $feed_url = \Drupal::url('view.frontpage.feed_1', [], [
+        'query' => ['feed' => $feed_name],
         'absolute' => TRUE,
-      ));
+      ]);
     }
-    $edit += array(
+    $edit += [
       'title[0][value]' => $feed_name,
       'url[0][value]' => $feed_url,
       'refresh' => '900',
-    );
+    ];
     return $edit;
   }
 
@@ -123,19 +123,19 @@ public function getFeedEditArray($feed_url = NULL, array $edit = array()) {
    * @return \Drupal\aggregator\FeedInterface
    *   A feed object.
    */
-  public function getFeedEditObject($feed_url = NULL, array $values = array()) {
+  public function getFeedEditObject($feed_url = NULL, array $values = []) {
     $feed_name = $this->randomMachineName(10);
     if (!$feed_url) {
-      $feed_url = \Drupal::url('view.frontpage.feed_1', array(
-        'query' => array('feed' => $feed_name),
+      $feed_url = \Drupal::url('view.frontpage.feed_1', [
+        'query' => ['feed' => $feed_name],
         'absolute' => TRUE,
-      ));
+      ]);
     }
-    $values += array(
+    $values += [
       'title' => $feed_name,
       'url' => $feed_url,
       'refresh' => '900',
-    );
+    ];
     return Feed::create($values);
   }
 
@@ -165,7 +165,7 @@ public function getDefaultFeedItemCount() {
   public function updateFeedItems(FeedInterface $feed, $expected_count = NULL) {
     // First, let's ensure we can get to the rss xml.
     $this->drupalGet($feed->getUrl());
-    $this->assertResponse(200, format_string(':url is reachable.', array(':url' => $feed->getUrl())));
+    $this->assertResponse(200, format_string(':url is reachable.', [':url' => $feed->getUrl()]));
 
     // Attempt to access the update link directly without an access token.
     $this->drupalGet('admin/config/services/aggregator/update/' . $feed->id());
@@ -176,15 +176,15 @@ public function updateFeedItems(FeedInterface $feed, $expected_count = NULL) {
     $this->clickLink('Update items');
 
     // Ensure we have the right number of items.
-    $result = db_query('SELECT iid FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()));
-    $feed->items = array();
+    $result = db_query('SELECT iid FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()]);
+    $feed->items = [];
     foreach ($result as $item) {
       $feed->items[] = $item->iid;
     }
 
     if ($expected_count !== NULL) {
       $feed->item_count = count($feed->items);
-      $this->assertEqual($expected_count, $feed->item_count, format_string('Total items in feed equal to the total items in database (@val1 != @val2)', array('@val1' => $expected_count, '@val2' => $feed->item_count)));
+      $this->assertEqual($expected_count, $feed->item_count, format_string('Total items in feed equal to the total items in database (@val1 != @val2)', ['@val1' => $expected_count, '@val2' => $feed->item_count]));
     }
   }
 
@@ -195,8 +195,8 @@ public function updateFeedItems(FeedInterface $feed, $expected_count = NULL) {
    *   Feed object representing the feed.
    */
   public function deleteFeedItems(FeedInterface $feed) {
-    $this->drupalPostForm('admin/config/services/aggregator/delete/' . $feed->id(), array(), t('Delete items'));
-    $this->assertRaw(t('The news items from %title have been deleted.', array('%title' => $feed->label())), 'Feed items deleted.');
+    $this->drupalPostForm('admin/config/services/aggregator/delete/' . $feed->id(), [], t('Delete items'));
+    $this->assertRaw(t('The news items from %title have been deleted.', ['%title' => $feed->label()]), 'Feed items deleted.');
   }
 
   /**
@@ -209,10 +209,10 @@ public function deleteFeedItems(FeedInterface $feed) {
    */
   public function updateAndDelete(FeedInterface $feed, $expected_count) {
     $this->updateFeedItems($feed, $expected_count);
-    $count = db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField();
+    $count = db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField();
     $this->assertTrue($count);
     $this->deleteFeedItems($feed);
-    $count = db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField();
+    $count = db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', [':fid' => $feed->id()])->fetchField();
     $this->assertTrue($count == 0);
   }
 
@@ -228,7 +228,7 @@ public function updateAndDelete(FeedInterface $feed, $expected_count) {
    *   TRUE if feed is unique.
    */
   public function uniqueFeed($feed_name, $feed_url) {
-    $result = db_query("SELECT COUNT(*) FROM {aggregator_feed} WHERE title = :title AND url = :url", array(':title' => $feed_name, ':url' => $feed_url))->fetchField();
+    $result = db_query("SELECT COUNT(*) FROM {aggregator_feed} WHERE title = :title AND url = :url", [':title' => $feed_name, ':url' => $feed_url])->fetchField();
     return (1 == $result);
   }
 
@@ -355,7 +355,7 @@ public function getHtmlEntitiesSample() {
   public function createSampleNodes($count = 5) {
     // Post $count article nodes.
     for ($i = 0; $i < $count; $i++) {
-      $edit = array();
+      $edit = [];
       $edit['title[0][value]'] = $this->randomMachineName();
       $edit['body[0][value]'] = $this->randomMachineName();
       $this->drupalPostForm('node/add/article', $edit, t('Save'));
@@ -369,10 +369,10 @@ public function enableTestPlugins() {
     $this->config('aggregator.settings')
       ->set('fetcher', 'aggregator_test_fetcher')
       ->set('parser', 'aggregator_test_parser')
-      ->set('processors', array(
+      ->set('processors', [
         'aggregator_test_processor' => 'aggregator_test_processor',
         'aggregator' => 'aggregator',
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/aggregator/tests/src/Functional/DeleteFeedItemTest.php b/core/modules/aggregator/tests/src/Functional/DeleteFeedItemTest.php
index 95202b813cb40bafa04704ae226cffcf5c4550ce..a8527f6b1c62fa10b9a449a7a8a5d7a91f5da8f0 100644
--- a/core/modules/aggregator/tests/src/Functional/DeleteFeedItemTest.php
+++ b/core/modules/aggregator/tests/src/Functional/DeleteFeedItemTest.php
@@ -13,15 +13,15 @@ class DeleteFeedItemTest extends AggregatorTestBase {
    */
   public function testDeleteFeedItem() {
     // Create a bunch of test feeds.
-    $feed_urls = array();
+    $feed_urls = [];
     // No last-modified, no etag.
-    $feed_urls[] = \Drupal::url('aggregator_test.feed', array(), array('absolute' => TRUE));
+    $feed_urls[] = \Drupal::url('aggregator_test.feed', [], ['absolute' => TRUE]);
     // Last-modified, but no etag.
-    $feed_urls[] = \Drupal::url('aggregator_test.feed', array('use_last_modified' => 1), array('absolute' => TRUE));
+    $feed_urls[] = \Drupal::url('aggregator_test.feed', ['use_last_modified' => 1], ['absolute' => TRUE]);
     // No Last-modified, but etag.
-    $feed_urls[] = \Drupal::url('aggregator_test.feed', array('use_last_modified' => 0, 'use_etag' => 1), array('absolute' => TRUE));
+    $feed_urls[] = \Drupal::url('aggregator_test.feed', ['use_last_modified' => 0, 'use_etag' => 1], ['absolute' => TRUE]);
     // Last-modified and etag.
-    $feed_urls[] = \Drupal::url('aggregator_test.feed', array('use_last_modified' => 1, 'use_etag' => 1), array('absolute' => TRUE));
+    $feed_urls[] = \Drupal::url('aggregator_test.feed', ['use_last_modified' => 1, 'use_etag' => 1], ['absolute' => TRUE]);
 
     foreach ($feed_urls as $feed_url) {
       $feed = $this->createFeed($feed_url);
diff --git a/core/modules/aggregator/tests/src/Functional/DeleteFeedTest.php b/core/modules/aggregator/tests/src/Functional/DeleteFeedTest.php
index 5bf5bd3eefc04bfbe666de5fb1515e9642961c22..7d7569628154cc0911ae7b5fe986039a155b45d1 100644
--- a/core/modules/aggregator/tests/src/Functional/DeleteFeedTest.php
+++ b/core/modules/aggregator/tests/src/Functional/DeleteFeedTest.php
@@ -14,7 +14,7 @@ class DeleteFeedTest extends AggregatorTestBase {
    *
    * @var array
    */
-  public static $modules = array('block');
+  public static $modules = ['block'];
 
   /**
    * Deletes a feed and ensures that all of its services are deleted.
@@ -43,7 +43,7 @@ public function testDeleteFeed() {
     $this->assertResponse(404, 'Deleted feed source does not exists.');
 
     // Check database for feed.
-    $result = db_query("SELECT COUNT(*) FROM {aggregator_feed} WHERE title = :title AND url = :url", array(':title' => $feed1->label(), ':url' => $feed1->getUrl()))->fetchField();
+    $result = db_query("SELECT COUNT(*) FROM {aggregator_feed} WHERE title = :title AND url = :url", [':title' => $feed1->label(), ':url' => $feed1->getUrl()])->fetchField();
     $this->assertFalse($result, 'Feed not found in database');
   }
 
diff --git a/core/modules/aggregator/tests/src/Functional/FeedCacheTagsTest.php b/core/modules/aggregator/tests/src/Functional/FeedCacheTagsTest.php
index 1a307201370aac750db03dc626671d841016e1cd..dc0aab9263e77fe0cf1a43083afb93f9c564eda8 100644
--- a/core/modules/aggregator/tests/src/Functional/FeedCacheTagsTest.php
+++ b/core/modules/aggregator/tests/src/Functional/FeedCacheTagsTest.php
@@ -17,7 +17,7 @@ class FeedCacheTagsTest extends EntityWithUriCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('aggregator');
+  public static $modules = ['aggregator'];
 
   /**
    * {@inheritdoc}
@@ -37,13 +37,13 @@ protected function setUp() {
    */
   protected function createEntity() {
     // Create a "Llama" feed.
-    $feed = Feed::create(array(
+    $feed = Feed::create([
       'title' => 'Llama',
       'url' => 'https://www.drupal.org/',
       'refresh' => 900,
       'checked' => 1389919932,
       'description' => 'Drupal.org',
-    ));
+    ]);
     $feed->save();
 
     return $feed;
diff --git a/core/modules/aggregator/tests/src/Functional/FeedParserTest.php b/core/modules/aggregator/tests/src/Functional/FeedParserTest.php
index 00c7b70492f62531ebdb98eecdd1d8e1957a85b5..ecb2e50c76e587759d62324ed912974f8b733550 100644
--- a/core/modules/aggregator/tests/src/Functional/FeedParserTest.php
+++ b/core/modules/aggregator/tests/src/Functional/FeedParserTest.php
@@ -30,7 +30,7 @@ public function testRSS091Sample() {
     $feed = $this->createFeed($this->getRSS091Sample());
     $feed->refreshItems();
     $this->drupalGet('aggregator/sources/' . $feed->id());
-    $this->assertResponse(200, format_string('Feed %name exists.', array('%name' => $feed->label())));
+    $this->assertResponse(200, format_string('Feed %name exists.', ['%name' => $feed->label()]));
     $this->assertText('First example feed item title');
     $this->assertLinkByHref('http://example.com/example-turns-one');
     $this->assertText('First example feed item description.');
@@ -53,19 +53,19 @@ public function testAtomSample() {
     $feed = $this->createFeed($this->getAtomSample());
     $feed->refreshItems();
     $this->drupalGet('aggregator/sources/' . $feed->id());
-    $this->assertResponse(200, format_string('Feed %name exists.', array('%name' => $feed->label())));
+    $this->assertResponse(200, format_string('Feed %name exists.', ['%name' => $feed->label()]));
     $this->assertText('Atom-Powered Robots Run Amok');
     $this->assertLinkByHref('http://example.org/2003/12/13/atom03');
     $this->assertText('Some text.');
-    $this->assertEqual('urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a', db_query('SELECT guid FROM {aggregator_item} WHERE link = :link', array(':link' => 'http://example.org/2003/12/13/atom03'))->fetchField(), 'Atom entry id element is parsed correctly.');
+    $this->assertEqual('urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a', db_query('SELECT guid FROM {aggregator_item} WHERE link = :link', [':link' => 'http://example.org/2003/12/13/atom03'])->fetchField(), 'Atom entry id element is parsed correctly.');
 
     // Check for second feed entry.
     $this->assertText('We tried to stop them, but we failed.');
     $this->assertLinkByHref('http://example.org/2003/12/14/atom03');
     $this->assertText('Some other text.');
-    $db_guid = db_query('SELECT guid FROM {aggregator_item} WHERE link = :link', array(
+    $db_guid = db_query('SELECT guid FROM {aggregator_item} WHERE link = :link', [
       ':link' => 'http://example.org/2003/12/14/atom03',
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual('urn:uuid:1225c695-cfb8-4ebb-bbbb-80da344efa6a', $db_guid, 'Atom entry id element is parsed correctly.');
   }
 
@@ -76,7 +76,7 @@ public function testHtmlEntitiesSample() {
     $feed = $this->createFeed($this->getHtmlEntitiesSample());
     $feed->refreshItems();
     $this->drupalGet('aggregator/sources/' . $feed->id());
-    $this->assertResponse(200, format_string('Feed %name exists.', array('%name' => $feed->label())));
+    $this->assertResponse(200, format_string('Feed %name exists.', ['%name' => $feed->label()]));
     $this->assertRaw("Quote&quot; Amp&amp;");
   }
 
@@ -85,12 +85,12 @@ public function testHtmlEntitiesSample() {
    */
   public function testRedirectFeed() {
     $redirect_url = Url::fromRoute('aggregator_test.redirect')->setAbsolute()->toString();
-    $feed = Feed::create(array('url' => $redirect_url, 'title' => $this->randomMachineName()));
+    $feed = Feed::create(['url' => $redirect_url, 'title' => $this->randomMachineName()]);
     $feed->save();
     $feed->refreshItems();
 
     // Make sure that the feed URL was updated correctly.
-    $this->assertEqual($feed->getUrl(), \Drupal::url('aggregator_test.feed', array(), array('absolute' => TRUE)));
+    $this->assertEqual($feed->getUrl(), \Drupal::url('aggregator_test.feed', [], ['absolute' => TRUE]));
   }
 
   /**
@@ -99,13 +99,13 @@ public function testRedirectFeed() {
   public function testInvalidFeed() {
     // Simulate a typo in the URL to force a curl exception.
     $invalid_url = 'http:/www.drupal.org';
-    $feed = Feed::create(array('url' => $invalid_url, 'title' => $this->randomMachineName()));
+    $feed = Feed::create(['url' => $invalid_url, 'title' => $this->randomMachineName()]);
     $feed->save();
 
     // Update the feed. Use the UI to be able to check the message easily.
     $this->drupalGet('admin/config/services/aggregator');
     $this->clickLink(t('Update items'));
-    $this->assertRaw(t('The feed from %title seems to be broken because of error', array('%title' => $feed->label())));
+    $this->assertRaw(t('The feed from %title seems to be broken because of error', ['%title' => $feed->label()]));
   }
 
 }
diff --git a/core/modules/aggregator/tests/src/Functional/FeedProcessorPluginTest.php b/core/modules/aggregator/tests/src/Functional/FeedProcessorPluginTest.php
index 5527d956132d168bbcc60ae18a30891abb0a16a7..bdc63f56b0bf5c85d7714682b925344a5e548e18 100644
--- a/core/modules/aggregator/tests/src/Functional/FeedProcessorPluginTest.php
+++ b/core/modules/aggregator/tests/src/Functional/FeedProcessorPluginTest.php
@@ -45,7 +45,7 @@ public function testDelete() {
     $description = $feed->description->value ?: '';
     $this->updateAndDelete($feed, NULL);
     // Make sure the feed title is changed.
-    $entities = entity_load_multiple_by_properties('aggregator_feed', array('description' => $description));
+    $entities = entity_load_multiple_by_properties('aggregator_feed', ['description' => $description]);
     $this->assertTrue(empty($entities));
   }
 
@@ -53,11 +53,11 @@ public function testDelete() {
    * Test post-processing functionality.
    */
   public function testPostProcess() {
-    $feed = $this->createFeed(NULL, array('refresh' => 1800));
+    $feed = $this->createFeed(NULL, ['refresh' => 1800]);
     $this->updateFeedItems($feed);
     $feed_id = $feed->id();
     // Reset entity cache manually.
-    \Drupal::entityManager()->getStorage('aggregator_feed')->resetCache(array($feed_id));
+    \Drupal::entityManager()->getStorage('aggregator_feed')->resetCache([$feed_id]);
     // Reload the feed to get new values.
     $feed = Feed::load($feed_id);
     // Make sure its refresh rate doubled.
diff --git a/core/modules/aggregator/tests/src/Functional/ImportOpmlTest.php b/core/modules/aggregator/tests/src/Functional/ImportOpmlTest.php
index 8994e3fe875c9639230468961013db9cd18e2d9f..2500b9ebb541b19670ee6d215e10531c61679b2e 100644
--- a/core/modules/aggregator/tests/src/Functional/ImportOpmlTest.php
+++ b/core/modules/aggregator/tests/src/Functional/ImportOpmlTest.php
@@ -14,7 +14,7 @@ class ImportOpmlTest extends AggregatorTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'help');
+  public static $modules = ['block', 'help'];
 
   /**
    * {@inheritdoc}
@@ -22,7 +22,7 @@ class ImportOpmlTest extends AggregatorTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $admin_user = $this->drupalCreateUser(array('administer news feeds', 'access news feeds', 'create article content', 'administer blocks'));
+    $admin_user = $this->drupalCreateUser(['administer news feeds', 'access news feeds', 'create article content', 'administer blocks']);
     $this->drupalLogin($admin_user);
   }
 
@@ -31,7 +31,7 @@ protected function setUp() {
    */
   public function openImportForm() {
     // Enable the help block.
-    $this->drupalPlaceBlock('help_block', array('region' => 'help'));
+    $this->drupalPlaceBlock('help_block', ['region' => 'help']);
 
     $this->drupalGet('admin/config/services/aggregator/add/opml');
     $this->assertText('A single OPML document may contain many feeds.', 'Found OPML help text.');
@@ -46,19 +46,19 @@ public function openImportForm() {
   public function validateImportFormFields() {
     $before = db_query('SELECT COUNT(*) FROM {aggregator_feed}')->fetchField();
 
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('admin/config/services/aggregator/add/opml', $edit, t('Import'));
     $this->assertRaw(t('<em>Either</em> upload a file or enter a URL.'), 'Error if no fields are filled.');
 
     $path = $this->getEmptyOpml();
-    $edit = array(
+    $edit = [
       'files[upload]' => $path,
       'remote' => file_create_url($path),
-    );
+    ];
     $this->drupalPostForm('admin/config/services/aggregator/add/opml', $edit, t('Import'));
     $this->assertRaw(t('<em>Either</em> upload a file or enter a URL.'), 'Error if both fields are filled.');
 
-    $edit = array('remote' => 'invalidUrl://empty');
+    $edit = ['remote' => 'invalidUrl://empty'];
     $this->drupalPostForm('admin/config/services/aggregator/add/opml', $edit, t('Import'));
     $this->assertText(t('The URL invalidUrl://empty is not valid.'), 'Error if the URL is invalid.');
 
@@ -76,7 +76,7 @@ protected function submitImportForm() {
     $this->drupalPostForm('admin/config/services/aggregator/add/opml', $form, t('Import'));
     $this->assertText(t('No new feed has been added.'), 'Attempting to upload invalid XML.');
 
-    $edit = array('remote' => file_create_url($this->getEmptyOpml()));
+    $edit = ['remote' => file_create_url($this->getEmptyOpml())];
     $this->drupalPostForm('admin/config/services/aggregator/add/opml', $edit, t('Import'));
     $this->assertText(t('No new feed has been added.'), 'Attempting to load empty OPML from remote URL.');
 
@@ -88,13 +88,13 @@ protected function submitImportForm() {
     $feeds[0] = $this->getFeedEditArray();
     $feeds[1] = $this->getFeedEditArray();
     $feeds[2] = $this->getFeedEditArray();
-    $edit = array(
+    $edit = [
       'files[upload]' => $this->getValidOpml($feeds),
       'refresh'       => '900',
-    );
+    ];
     $this->drupalPostForm('admin/config/services/aggregator/add/opml', $edit, t('Import'));
-    $this->assertRaw(t('A feed with the URL %url already exists.', array('%url' => $feeds[0]['url[0][value]'])), 'Verifying that a duplicate URL was identified');
-    $this->assertRaw(t('A feed named %title already exists.', array('%title' => $feeds[1]['title[0][value]'])), 'Verifying that a duplicate title was identified');
+    $this->assertRaw(t('A feed with the URL %url already exists.', ['%url' => $feeds[0]['url[0][value]']]), 'Verifying that a duplicate URL was identified');
+    $this->assertRaw(t('A feed named %title already exists.', ['%title' => $feeds[1]['title[0][value]']]), 'Verifying that a duplicate title was identified');
 
     $after = db_query('SELECT COUNT(*) FROM {aggregator_feed}')->fetchField();
     $this->assertEqual($after, 2, 'Verifying that two distinct feeds were added.');
diff --git a/core/modules/aggregator/tests/src/Functional/ItemCacheTagsTest.php b/core/modules/aggregator/tests/src/Functional/ItemCacheTagsTest.php
index 46b076cb296b04d6ba73f9b6a54ea5055f04603c..09da3436827b1e87bb3bea7ecb06668eaacde2a6 100644
--- a/core/modules/aggregator/tests/src/Functional/ItemCacheTagsTest.php
+++ b/core/modules/aggregator/tests/src/Functional/ItemCacheTagsTest.php
@@ -19,7 +19,7 @@ class ItemCacheTagsTest extends EntityCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('aggregator');
+  public static $modules = ['aggregator'];
 
   /**
    * {@inheritdoc}
@@ -39,21 +39,21 @@ protected function setUp() {
    */
   protected function createEntity() {
     // Create a "Camelids" feed.
-    $feed = Feed::create(array(
+    $feed = Feed::create([
       'title' => 'Camelids',
       'url' => 'https://groups.drupal.org/not_used/167169',
       'refresh' => 900,
       'checked' => 1389919932,
       'description' => 'Drupal Core Group feed',
-    ));
+    ]);
     $feed->save();
 
     // Create a "Llama" aggregator feed item.
-    $item = Item::create(array(
+    $item = Item::create([
       'fid' => $feed->id(),
       'title' => t('Llama'),
       'path' => 'https://www.drupal.org/',
-    ));
+    ]);
     $item->save();
 
     return $item;
@@ -67,14 +67,14 @@ public function testEntityCreation() {
     \Drupal::cache('render')->set('foo', 'bar', CacheBackendInterface::CACHE_PERMANENT, $this->entity->getCacheTags());
 
     // Verify a cache hit.
-    $this->verifyRenderCache('foo', array('aggregator_feed:1'));
+    $this->verifyRenderCache('foo', ['aggregator_feed:1']);
 
     // Now create a feed item in that feed.
-    Item::create(array(
+    Item::create([
       'fid' => $this->entity->getFeedId(),
       'title' => t('Llama 2'),
       'path' => 'https://groups.drupal.org/',
-    ))->save();
+    ])->save();
 
     // Verify a cache miss.
     $this->assertFalse(\Drupal::cache('render')->get('foo'), 'Creating a new feed item invalidates the cache tag of the feed.');
diff --git a/core/modules/aggregator/tests/src/Kernel/FeedValidationTest.php b/core/modules/aggregator/tests/src/Kernel/FeedValidationTest.php
index 81a501e3ba904400704c6c1f0d4a4b72205dde31..d8804dd9c3792093de789545347e67fc45baec5f 100644
--- a/core/modules/aggregator/tests/src/Kernel/FeedValidationTest.php
+++ b/core/modules/aggregator/tests/src/Kernel/FeedValidationTest.php
@@ -17,7 +17,7 @@ class FeedValidationTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('aggregator', 'options');
+  public static $modules = ['aggregator', 'options'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/aggregator/tests/src/Kernel/Migrate/d6/MigrateAggregatorConfigsTest.php b/core/modules/aggregator/tests/src/Kernel/Migrate/d6/MigrateAggregatorConfigsTest.php
index d8f1b6f87614a3b51e190552a6b14ef6c58d98ca..280a103db8e17251f4e0624ec0f7656a07218995 100644
--- a/core/modules/aggregator/tests/src/Kernel/Migrate/d6/MigrateAggregatorConfigsTest.php
+++ b/core/modules/aggregator/tests/src/Kernel/Migrate/d6/MigrateAggregatorConfigsTest.php
@@ -34,7 +34,7 @@ public function testAggregatorSettings() {
     $config = $this->config('aggregator.settings');
     $this->assertIdentical('aggregator', $config->get('fetcher'));
     $this->assertIdentical('aggregator', $config->get('parser'));
-    $this->assertIdentical(array('aggregator'), $config->get('processors'));
+    $this->assertIdentical(['aggregator'], $config->get('processors'));
     $this->assertIdentical(600, $config->get('items.teaser_length'));
     $this->assertIdentical('<a> <b> <br /> <dd> <dl> <dt> <em> <i> <li> <ol> <p> <strong> <u> <ul>', $config->get('items.allowed_html'));
     $this->assertIdentical(9676800, $config->get('items.expire'));
diff --git a/core/modules/aggregator/tests/src/Kernel/Views/IntegrationTest.php b/core/modules/aggregator/tests/src/Kernel/Views/IntegrationTest.php
index a72da23c8b2f60f2b8e4d6537f4668955f8d54c6..39f57b251889e6026ee24022268e2c87a63397ff 100644
--- a/core/modules/aggregator/tests/src/Kernel/Views/IntegrationTest.php
+++ b/core/modules/aggregator/tests/src/Kernel/Views/IntegrationTest.php
@@ -21,14 +21,14 @@ class IntegrationTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('aggregator', 'aggregator_test_views', 'system', 'field', 'options', 'user');
+  public static $modules = ['aggregator', 'aggregator_test_views', 'system', 'field', 'options', 'user'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_aggregator_items');
+  public static $testViews = ['test_aggregator_items'];
 
   /**
    * The entity storage for aggregator items.
@@ -53,7 +53,7 @@ protected function setUp($import_test_views = TRUE) {
     $this->installEntitySchema('aggregator_item');
     $this->installEntitySchema('aggregator_feed');
 
-    ViewTestData::createTestViews(get_class($this), array('aggregator_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['aggregator_test_views']);
 
     $this->itemStorage = $this->container->get('entity.manager')->getStorage('aggregator_item');
     $this->feedStorage = $this->container->get('entity.manager')->getStorage('aggregator_feed');
@@ -66,19 +66,19 @@ public function testAggregatorItemView() {
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
     $renderer = \Drupal::service('renderer');
 
-    $feed = $this->feedStorage->create(array(
+    $feed = $this->feedStorage->create([
       'title' => $this->randomMachineName(),
       'url' => 'https://www.drupal.org/',
       'refresh' => 900,
       'checked' => 123543535,
       'description' => $this->randomMachineName(),
-    ));
+    ]);
     $feed->save();
 
-    $items = array();
-    $expected = array();
+    $items = [];
+    $expected = [];
     for ($i = 0; $i < 10; $i++) {
-      $values = array();
+      $values = [];
       $values['fid'] = $feed->id();
       $values['timestamp'] = mt_rand(REQUEST_TIME - 10, REQUEST_TIME + 10);
       $values['title'] = $this->randomMachineName();
@@ -99,13 +99,13 @@ public function testAggregatorItemView() {
     $view = Views::getView('test_aggregator_items');
     $this->executeView($view);
 
-    $column_map = array(
+    $column_map = [
       'iid' => 'iid',
       'title' => 'title',
       'aggregator_item_timestamp' => 'timestamp',
       'description' => 'description',
       'aggregator_item_author' => 'author',
-    );
+    ];
     $this->assertIdenticalResultset($view, $expected, $column_map);
 
     // Ensure that the rendering of the linked title works as expected.
diff --git a/core/modules/aggregator/tests/src/Unit/Menu/AggregatorLocalTasksTest.php b/core/modules/aggregator/tests/src/Unit/Menu/AggregatorLocalTasksTest.php
index c9f6906f66e6d790b15f7c3f6bc3c0609076a8cc..7a78ad9fb4ec4fd3dcd580028e73c309dc601a2f 100644
--- a/core/modules/aggregator/tests/src/Unit/Menu/AggregatorLocalTasksTest.php
+++ b/core/modules/aggregator/tests/src/Unit/Menu/AggregatorLocalTasksTest.php
@@ -15,7 +15,7 @@ class AggregatorLocalTasksTest extends LocalTaskIntegrationTestBase {
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->directoryList = array('aggregator' => 'core/modules/aggregator');
+    $this->directoryList = ['aggregator' => 'core/modules/aggregator'];
     parent::setUp();
   }
 
@@ -25,19 +25,19 @@ protected function setUp() {
    * @dataProvider getAggregatorAdminRoutes
    */
   public function testAggregatorAdminLocalTasks($route) {
-    $this->assertLocalTasks($route, array(
-      0 => array('aggregator.admin_overview', 'aggregator.admin_settings'),
-    ));
+    $this->assertLocalTasks($route, [
+      0 => ['aggregator.admin_overview', 'aggregator.admin_settings'],
+    ]);
   }
 
   /**
    * Provides a list of routes to test.
    */
   public function getAggregatorAdminRoutes() {
-    return array(
-      array('aggregator.admin_overview'),
-      array('aggregator.admin_settings'),
-    );
+    return [
+      ['aggregator.admin_overview'],
+      ['aggregator.admin_settings'],
+    ];
   }
 
   /**
@@ -46,9 +46,9 @@ public function getAggregatorAdminRoutes() {
    * @dataProvider getAggregatorSourceRoutes
    */
   public function testAggregatorSourceLocalTasks($route) {
-    $this->assertLocalTasks($route, array(
-      0 => array('entity.aggregator_feed.canonical', 'entity.aggregator_feed.edit_form', 'entity.aggregator_feed.delete_form'),
-    ));
+    $this->assertLocalTasks($route, [
+      0 => ['entity.aggregator_feed.canonical', 'entity.aggregator_feed.edit_form', 'entity.aggregator_feed.delete_form'],
+    ]);
     ;
   }
 
@@ -56,10 +56,10 @@ public function testAggregatorSourceLocalTasks($route) {
    * Provides a list of source routes to test.
    */
   public function getAggregatorSourceRoutes() {
-    return array(
-      array('entity.aggregator_feed.canonical'),
-      array('entity.aggregator_feed.edit_form'),
-    );
+    return [
+      ['entity.aggregator_feed.canonical'],
+      ['entity.aggregator_feed.edit_form'],
+    ];
   }
 
 }
diff --git a/core/modules/aggregator/tests/src/Unit/Plugin/AggregatorPluginSettingsBaseTest.php b/core/modules/aggregator/tests/src/Unit/Plugin/AggregatorPluginSettingsBaseTest.php
index 87a5d934329bb76774ca30a4dd0c5e3a6ab3e865..926723702df0d0799af3399b712f50fb31e5a1ad 100644
--- a/core/modules/aggregator/tests/src/Unit/Plugin/AggregatorPluginSettingsBaseTest.php
+++ b/core/modules/aggregator/tests/src/Unit/Plugin/AggregatorPluginSettingsBaseTest.php
@@ -39,20 +39,20 @@ class AggregatorPluginSettingsBaseTest extends UnitTestCase {
    */
   protected function setUp() {
     $this->configFactory = $this->getConfigFactoryStub(
-      array(
-        'aggregator.settings' => array(
-          'processors' => array('aggregator_test'),
-        ),
-        'aggregator_test.settings' => array(),
-      )
+      [
+        'aggregator.settings' => [
+          'processors' => ['aggregator_test'],
+        ],
+        'aggregator_test.settings' => [],
+      ]
     );
-    foreach (array('fetcher', 'parser', 'processor') as $type) {
+    foreach (['fetcher', 'parser', 'processor'] as $type) {
       $this->managers[$type] = $this->getMockBuilder('Drupal\aggregator\Plugin\AggregatorPluginManager')
         ->disableOriginalConstructor()
         ->getMock();
       $this->managers[$type]->expects($this->once())
         ->method('getDefinitions')
-        ->will($this->returnValue(array('aggregator_test' => array('title' => '', 'description' => ''))));
+        ->will($this->returnValue(['aggregator_test' => ['title' => '', 'description' => '']]));
     }
 
     $this->settingsForm = new SettingsForm(
@@ -79,8 +79,8 @@ public function testSettingsForm() {
 
     $test_processor = $this->getMock(
       'Drupal\aggregator_test\Plugin\aggregator\processor\TestProcessor',
-      array('buildConfigurationForm', 'validateConfigurationForm', 'submitConfigurationForm'),
-      array(array(), 'aggregator_test', array('description' => ''), $this->configFactory)
+      ['buildConfigurationForm', 'validateConfigurationForm', 'submitConfigurationForm'],
+      [[], 'aggregator_test', ['description' => ''], $this->configFactory]
     );
     $test_processor->expects($this->at(0))
       ->method('buildConfigurationForm')
@@ -98,7 +98,7 @@ public function testSettingsForm() {
       ->with($this->equalTo('aggregator_test'))
       ->will($this->returnValue($test_processor));
 
-    $form = $this->settingsForm->buildForm(array(), $form_state);
+    $form = $this->settingsForm->buildForm([], $form_state);
     $this->settingsForm->validateForm($form, $form_state);
     $this->settingsForm->submitForm($form, $form_state);
   }
diff --git a/core/modules/ban/ban.install b/core/modules/ban/ban.install
index b2ea1fe3d337c72ef402849d25947835c82f1c62..f3c003a91c3ab69bea52e9e78c3819440a1d97e3 100644
--- a/core/modules/ban/ban.install
+++ b/core/modules/ban/ban.install
@@ -9,27 +9,27 @@
  * Implements hook_schema().
  */
 function ban_schema() {
-  $schema['ban_ip'] = array(
+  $schema['ban_ip'] = [
     'description' => 'Stores banned IP addresses.',
-    'fields' => array(
-      'iid' => array(
+    'fields' => [
+      'iid' => [
         'description' => 'Primary Key: unique ID for IP addresses.',
         'type' => 'serial',
         'unsigned' => TRUE,
         'not null' => TRUE,
-      ),
-      'ip' => array(
+      ],
+      'ip' => [
         'description' => 'IP address',
         'type' => 'varchar_ascii',
         'length' => 40,
         'not null' => TRUE,
         'default' => '',
-      ),
-    ),
-    'indexes' => array(
-      'ip' => array('ip'),
-    ),
-    'primary key' => array('iid'),
-  );
+      ],
+    ],
+    'indexes' => [
+      'ip' => ['ip'],
+    ],
+    'primary key' => ['iid'],
+  ];
   return $schema;
 }
diff --git a/core/modules/ban/ban.module b/core/modules/ban/ban.module
index a1ee23803b4e17c9a4f490a96e76c20bfc170c08..b8b72c5035e3c76ca5ef7e62bcf68b9dce08ca58 100644
--- a/core/modules/ban/ban.module
+++ b/core/modules/ban/ban.module
@@ -15,11 +15,11 @@ function ban_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.ban':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Ban module allows administrators to ban visits to their site from individual IP addresses. For more information, see the <a href=":url">online documentation for the Ban module</a>.', array(':url' => 'https://www.drupal.org/documentation/modules/ban')) . '</p>';
+      $output .= '<p>' . t('The Ban module allows administrators to ban visits to their site from individual IP addresses. For more information, see the <a href=":url">online documentation for the Ban module</a>.', [':url' => 'https://www.drupal.org/documentation/modules/ban']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Banning IP addresses') . '</dt>';
-      $output .= '<dd>' . t('Administrators can enter IP addresses to ban on the <a href=":bans">IP address bans</a> page.', array(':bans' => \Drupal::url('ban.admin_page'))) . '</dd>';
+      $output .= '<dd>' . t('Administrators can enter IP addresses to ban on the <a href=":bans">IP address bans</a> page.', [':bans' => \Drupal::url('ban.admin_page')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
diff --git a/core/modules/ban/src/BanIpManager.php b/core/modules/ban/src/BanIpManager.php
index a92731c288ea7e1b42ef1fa11b9cb0c43d3e56aa..d354f7a71cbfbc4282668f3d3aad41b3bbc11240 100644
--- a/core/modules/ban/src/BanIpManager.php
+++ b/core/modules/ban/src/BanIpManager.php
@@ -30,7 +30,7 @@ public function __construct(Connection $connection) {
    * {@inheritdoc}
    */
   public function isBanned($ip) {
-    return (bool) $this->connection->query("SELECT * FROM {ban_ip} WHERE ip = :ip", array(':ip' => $ip))->fetchField();
+    return (bool) $this->connection->query("SELECT * FROM {ban_ip} WHERE ip = :ip", [':ip' => $ip])->fetchField();
   }
 
   /**
@@ -45,8 +45,8 @@ public function findAll() {
    */
   public function banIp($ip) {
     $this->connection->merge('ban_ip')
-      ->key(array('ip' => $ip))
-      ->fields(array('ip' => $ip))
+      ->key(['ip' => $ip])
+      ->fields(['ip' => $ip])
       ->execute();
   }
 
@@ -63,7 +63,7 @@ public function unbanIp($id) {
    * {@inheritdoc}
    */
   public function findById($ban_id) {
-    return $this->connection->query("SELECT ip FROM {ban_ip} WHERE iid = :iid", array(':iid' => $ban_id))->fetchField();
+    return $this->connection->query("SELECT ip FROM {ban_ip} WHERE iid = :iid", [':iid' => $ban_id])->fetchField();
   }
 
 }
diff --git a/core/modules/ban/src/Form/BanAdmin.php b/core/modules/ban/src/Form/BanAdmin.php
index a0c769fd4765b2852fa706d9eeabad3c77003db9..731d06518c8ac29cf66a653d7ea083e73279e813 100644
--- a/core/modules/ban/src/Form/BanAdmin.php
+++ b/core/modules/ban/src/Form/BanAdmin.php
@@ -52,47 +52,47 @@ public function getFormId() {
    *   address form field.
    */
   public function buildForm(array $form, FormStateInterface $form_state, $default_ip = '') {
-    $rows = array();
-    $header = array($this->t('banned IP addresses'), $this->t('Operations'));
+    $rows = [];
+    $header = [$this->t('banned IP addresses'), $this->t('Operations')];
     $result = $this->ipManager->findAll();
     foreach ($result as $ip) {
-      $row = array();
+      $row = [];
       $row[] = $ip->ip;
-      $links = array();
-      $links['delete'] = array(
+      $links = [];
+      $links['delete'] = [
         'title' => $this->t('Delete'),
         'url' => Url::fromRoute('ban.delete', ['ban_id' => $ip->iid]),
-      );
-      $row[] = array(
-        'data' => array(
+      ];
+      $row[] = [
+        'data' => [
           '#type' => 'operations',
           '#links' => $links,
-        ),
-      );
+        ],
+      ];
       $rows[] = $row;
     }
 
-    $form['ip'] = array(
+    $form['ip'] = [
       '#title' => $this->t('IP address'),
       '#type' => 'textfield',
       '#size' => 48,
       '#maxlength' => 40,
       '#default_value' => $default_ip,
       '#description' => $this->t('Enter a valid IP address.'),
-    );
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Add'),
-    );
+    ];
 
-    $form['ban_ip_banning_table'] = array(
+    $form['ban_ip_banning_table'] = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#empty' => $this->t('No blocked IP addresses available.'),
       '#weight' => 120,
-    );
+    ];
     return $form;
   }
 
@@ -118,7 +118,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $ip = trim($form_state->getValue('ip'));
     $this->ipManager->banIp($ip);
-    drupal_set_message($this->t('The IP address %ip has been banned.', array('%ip' => $ip)));
+    drupal_set_message($this->t('The IP address %ip has been banned.', ['%ip' => $ip]));
     $form_state->setRedirect('ban.admin_page');
   }
 
diff --git a/core/modules/ban/src/Form/BanDelete.php b/core/modules/ban/src/Form/BanDelete.php
index a8a4962458ecc0f897e786fede0e6820e32a446a..3d14ca3415398d5707d803255a2e2eee9ddbfd9e 100644
--- a/core/modules/ban/src/Form/BanDelete.php
+++ b/core/modules/ban/src/Form/BanDelete.php
@@ -58,7 +58,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to unblock %ip?', array('%ip' => $this->banIp));
+    return $this->t('Are you sure you want to unblock %ip?', ['%ip' => $this->banIp]);
   }
 
   /**
@@ -93,8 +93,8 @@ public function buildForm(array $form, FormStateInterface $form_state, $ban_id =
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->ipManager->unbanIp($this->banIp);
-    $this->logger('user')->notice('Deleted %ip', array('%ip' => $this->banIp));
-    drupal_set_message($this->t('The IP address %ip was deleted.', array('%ip' => $this->banIp)));
+    $this->logger('user')->notice('Deleted %ip', ['%ip' => $this->banIp]);
+    drupal_set_message($this->t('The IP address %ip was deleted.', ['%ip' => $this->banIp]));
     $form_state->setRedirectUrl($this->getCancelUrl());
   }
 
diff --git a/core/modules/ban/src/Plugin/migrate/destination/BlockedIp.php b/core/modules/ban/src/Plugin/migrate/destination/BlockedIp.php
index 94135fd3f6f9e622e3d7760589cb07935a320a33..7c570bb793cc3779f7ee0cf70bf4b15ac4c7dfd4 100644
--- a/core/modules/ban/src/Plugin/migrate/destination/BlockedIp.php
+++ b/core/modules/ban/src/Plugin/migrate/destination/BlockedIp.php
@@ -76,7 +76,7 @@ public function fields(MigrationInterface $migration = NULL) {
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     $this->banManager->banIp($row->getDestinationProperty('ip'));
   }
 
diff --git a/core/modules/ban/tests/src/Functional/IpAddressBlockingTest.php b/core/modules/ban/tests/src/Functional/IpAddressBlockingTest.php
index 9738915023af79943b6c9c9b104231e9d6778639..0a155fb471b9644c286dd5877dff12b848b33ae3 100644
--- a/core/modules/ban/tests/src/Functional/IpAddressBlockingTest.php
+++ b/core/modules/ban/tests/src/Functional/IpAddressBlockingTest.php
@@ -18,55 +18,55 @@ class IpAddressBlockingTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('ban');
+  public static $modules = ['ban'];
 
   /**
    * Tests various user input to confirm correct validation and saving of data.
    */
   function testIPAddressValidation() {
     // Create user.
-    $admin_user = $this->drupalCreateUser(array('ban IP addresses'));
+    $admin_user = $this->drupalCreateUser(['ban IP addresses']);
     $this->drupalLogin($admin_user);
     $this->drupalGet('admin/config/people/ban');
 
     // Ban a valid IP address.
-    $edit = array();
+    $edit = [];
     $edit['ip'] = '1.2.3.3';
     $this->drupalPostForm('admin/config/people/ban', $edit, t('Add'));
-    $ip = db_query("SELECT iid from {ban_ip} WHERE ip = :ip", array(':ip' => $edit['ip']))->fetchField();
+    $ip = db_query("SELECT iid from {ban_ip} WHERE ip = :ip", [':ip' => $edit['ip']])->fetchField();
     $this->assertTrue($ip, 'IP address found in database.');
-    $this->assertRaw(t('The IP address %ip has been banned.', array('%ip' => $edit['ip'])), 'IP address was banned.');
+    $this->assertRaw(t('The IP address %ip has been banned.', ['%ip' => $edit['ip']]), 'IP address was banned.');
 
     // Try to block an IP address that's already blocked.
-    $edit = array();
+    $edit = [];
     $edit['ip'] = '1.2.3.3';
     $this->drupalPostForm('admin/config/people/ban', $edit, t('Add'));
     $this->assertText(t('This IP address is already banned.'));
 
     // Try to block a reserved IP address.
-    $edit = array();
+    $edit = [];
     $edit['ip'] = '255.255.255.255';
     $this->drupalPostForm('admin/config/people/ban', $edit, t('Add'));
     $this->assertText(t('Enter a valid IP address.'));
 
     // Try to block a reserved IP address.
-    $edit = array();
+    $edit = [];
     $edit['ip'] = 'test.example.com';
     $this->drupalPostForm('admin/config/people/ban', $edit, t('Add'));
     $this->assertText(t('Enter a valid IP address.'));
 
     // Submit an empty form.
-    $edit = array();
+    $edit = [];
     $edit['ip'] = '';
     $this->drupalPostForm('admin/config/people/ban', $edit, t('Add'));
     $this->assertText(t('Enter a valid IP address.'));
 
     // Pass an IP address as a URL parameter and submit it.
     $submit_ip = '1.2.3.4';
-    $this->drupalPostForm('admin/config/people/ban/' . $submit_ip, array(), t('Add'));
-    $ip = db_query("SELECT iid from {ban_ip} WHERE ip = :ip", array(':ip' => $submit_ip))->fetchField();
+    $this->drupalPostForm('admin/config/people/ban/' . $submit_ip, [], t('Add'));
+    $ip = db_query("SELECT iid from {ban_ip} WHERE ip = :ip", [':ip' => $submit_ip])->fetchField();
     $this->assertTrue($ip, 'IP address found in database');
-    $this->assertRaw(t('The IP address %ip has been banned.', array('%ip' => $submit_ip)), 'IP address was banned.');
+    $this->assertRaw(t('The IP address %ip has been banned.', ['%ip' => $submit_ip]), 'IP address was banned.');
 
     // Submit your own IP address. This fails, although it works when testing
     // manually.
@@ -85,7 +85,7 @@ function testIPAddressValidation() {
     $banIp->banIp($ip);
     $banIp->banIp($ip);
     $query = db_select('ban_ip', 'bip');
-    $query->fields('bip', array('iid'));
+    $query->fields('bip', ['iid']);
     $query->condition('bip.ip', $ip);
     $ip_count = $query->execute()->fetchAll();
     $this->assertEqual(1, count($ip_count));
@@ -93,7 +93,7 @@ function testIPAddressValidation() {
     $banIp->banIp($ip);
     $banIp->banIp($ip);
     $query = db_select('ban_ip', 'bip');
-    $query->fields('bip', array('iid'));
+    $query->fields('bip', ['iid']);
     $query->condition('bip.ip', $ip);
     $ip_count = $query->execute()->fetchAll();
     $this->assertEqual(1, count($ip_count));
diff --git a/core/modules/basic_auth/basic_auth.module b/core/modules/basic_auth/basic_auth.module
index ea64c5ba18e23b185ca897993cfdd296f8e37003..7d1d01f6b69f4d2e4ae2e2bca130609f0b1d3cac 100644
--- a/core/modules/basic_auth/basic_auth.module
+++ b/core/modules/basic_auth/basic_auth.module
@@ -15,7 +15,7 @@ function basic_auth_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.basic_auth':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The HTTP Basic Authentication module supplies an <a href="http://en.wikipedia.org/wiki/Basic_access_authentication">HTTP Basic authentication</a> provider for web service requests. This authentication provider authenticates requests using the HTTP Basic Authentication username and password, as an alternative to using Drupal\'s standard cookie-based authentication system. It is only useful if your site provides web services configured to use this type of authentication (for instance, the <a href=":rest_help">RESTful Web Services module</a>). For more information, see the <a href=":hba_do">online documentation for the HTTP Basic Authentication module</a>.', array(':hba_do' => 'https://www.drupal.org/documentation/modules/basic_auth', ':rest_help' => (\Drupal::moduleHandler()->moduleExists('rest')) ? \Drupal::url('help.page', array('name' => 'rest')) : '#')) . '</p>';
+      $output .= '<p>' . t('The HTTP Basic Authentication module supplies an <a href="http://en.wikipedia.org/wiki/Basic_access_authentication">HTTP Basic authentication</a> provider for web service requests. This authentication provider authenticates requests using the HTTP Basic Authentication username and password, as an alternative to using Drupal\'s standard cookie-based authentication system. It is only useful if your site provides web services configured to use this type of authentication (for instance, the <a href=":rest_help">RESTful Web Services module</a>). For more information, see the <a href=":hba_do">online documentation for the HTTP Basic Authentication module</a>.', [':hba_do' => 'https://www.drupal.org/documentation/modules/basic_auth', ':rest_help' => (\Drupal::moduleHandler()->moduleExists('rest')) ? \Drupal::url('help.page', ['name' => 'rest']) : '#']) . '</p>';
       return $output;
   }
 }
diff --git a/core/modules/basic_auth/src/Authentication/Provider/BasicAuth.php b/core/modules/basic_auth/src/Authentication/Provider/BasicAuth.php
index eac482c8125c8e53dafd3ba7d61c7bc07c597321..c72e3f0c0168e24e49d9a694257d079d85910d09 100644
--- a/core/modules/basic_auth/src/Authentication/Provider/BasicAuth.php
+++ b/core/modules/basic_auth/src/Authentication/Provider/BasicAuth.php
@@ -88,7 +88,7 @@ public function authenticate(Request $request) {
     // in to many different user accounts.  We have a reasonably high limit
     // since there may be only one apparent IP for all users at an institution.
     if ($this->flood->isAllowed('basic_auth.failed_login_ip', $flood_config->get('ip_limit'), $flood_config->get('ip_window'))) {
-      $accounts = $this->entityManager->getStorage('user')->loadByProperties(array('name' => $username, 'status' => 1));
+      $accounts = $this->entityManager->getStorage('user')->loadByProperties(['name' => $username, 'status' => 1]);
       $account = reset($accounts);
       if ($account) {
         if ($flood_config->get('uid_only')) {
@@ -127,9 +127,9 @@ public function authenticate(Request $request) {
    */
   public function challengeException(Request $request, \Exception $previous) {
     $site_name = $this->configFactory->get('system.site')->get('name');
-    $challenge = SafeMarkup::format('Basic realm="@realm"', array(
+    $challenge = SafeMarkup::format('Basic realm="@realm"', [
       '@realm' => !empty($site_name) ? $site_name : 'Access restricted',
-    ));
+    ]);
     return new UnauthorizedHttpException((string) $challenge, 'No authentication credentials provided.', $previous);
   }
 
diff --git a/core/modules/basic_auth/src/Tests/Authentication/BasicAuthTest.php b/core/modules/basic_auth/src/Tests/Authentication/BasicAuthTest.php
index 04bb0fdc998362a1c09bbca65dc0673972d3ff71..45b9b356eb50214a866dcdbe5fa5680c274a6b38 100644
--- a/core/modules/basic_auth/src/Tests/Authentication/BasicAuthTest.php
+++ b/core/modules/basic_auth/src/Tests/Authentication/BasicAuthTest.php
@@ -22,7 +22,7 @@ class BasicAuthTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('basic_auth', 'router_test', 'locale', 'basic_auth_test');
+  public static $modules = ['basic_auth', 'router_test', 'locale', 'basic_auth_test'];
 
   /**
    * Test http basic authentication.
@@ -55,7 +55,7 @@ public function testBasicAuth() {
     $this->drupalGet('admin');
     $this->assertResponse('403', 'No authentication prompt for routes not explicitly defining authentication providers.');
 
-    $account = $this->drupalCreateUser(array('access administration pages'));
+    $account = $this->drupalCreateUser(['access administration pages']);
 
     $this->basicAuthGet(Url::fromRoute('system.admin'), $account->getUsername(), $account->pass_raw);
     $this->assertNoLink('Log out', 'User is not logged in');
@@ -82,7 +82,7 @@ function testGlobalLoginFloodControl() {
       ->set('user_limit', 4000)
       ->save();
 
-    $user = $this->drupalCreateUser(array());
+    $user = $this->drupalCreateUser([]);
     $incorrect_user = clone $user;
     $incorrect_user->pass_raw .= 'incorrect';
     $url = Url::fromRoute('router_test.11');
@@ -107,10 +107,10 @@ function testPerUserLoginFloodControl() {
       ->set('user_limit', 2)
       ->save();
 
-    $user = $this->drupalCreateUser(array());
+    $user = $this->drupalCreateUser([]);
     $incorrect_user = clone $user;
     $incorrect_user->pass_raw .= 'incorrect';
-    $user2 = $this->drupalCreateUser(array());
+    $user2 = $this->drupalCreateUser([]);
     $url = Url::fromRoute('router_test.11');
 
     // Try a failed login.
diff --git a/core/modules/basic_auth/src/Tests/BasicAuthTestTrait.php b/core/modules/basic_auth/src/Tests/BasicAuthTestTrait.php
index b5766fb64a665552b30c45f8d0c8713fdb80303d..8a289b0037e400530c61b0e41c1b6b64b59cd265 100644
--- a/core/modules/basic_auth/src/Tests/BasicAuthTestTrait.php
+++ b/core/modules/basic_auth/src/Tests/BasicAuthTestTrait.php
@@ -51,7 +51,7 @@ protected function basicAuthGet($path, $username, $password, array $options = []
    *
    * @see \Drupal\simpletest\WebTestBase::drupalPostForm()
    */
-  protected function basicAuthPostForm($path, $edit, $submit, $username, $password, array $options = array(), $form_html_id = NULL, $extra_post = NULL) {
+  protected function basicAuthPostForm($path, $edit, $submit, $username, $password, array $options = [], $form_html_id = NULL, $extra_post = NULL) {
     return $this->drupalPostForm($path, $edit, $submit, $options, $this->getBasicAuthHeaders($username, $password), $form_html_id, $extra_post);
   }
 
diff --git a/core/modules/big_pipe/tests/modules/big_pipe_test/src/Form/BigPipeTestForm.php b/core/modules/big_pipe/tests/modules/big_pipe_test/src/Form/BigPipeTestForm.php
index ccb15b737ccf3a75db149ae8d075661f1dd427d7..c56ee327871a2b22db94c9eb2a2ebddf68223c74 100644
--- a/core/modules/big_pipe/tests/modules/big_pipe_test/src/Form/BigPipeTestForm.php
+++ b/core/modules/big_pipe/tests/modules/big_pipe_test/src/Form/BigPipeTestForm.php
@@ -20,14 +20,14 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $form['#token'] = FALSE;
 
-    $form['big_pipe'] = array(
+    $form['big_pipe'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('BigPipe works…'),
       '#options' => [
         'js' => $this->t('… with JavaScript'),
         'nojs' => $this->t('… without JavaScript'),
       ],
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/block/block.module b/core/modules/block/block.module
index 7e39da4006866c82cd36b81c17669bae9849fa38..ee6a4a11ea536836ee34acb29c87fc87ca669fd0 100644
--- a/core/modules/block/block.module
+++ b/core/modules/block/block.module
@@ -18,24 +18,24 @@
 function block_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.block':
-      $block_content = \Drupal::moduleHandler()->moduleExists('block_content') ? \Drupal::url('help.page', array('name' => 'block_content')) : '#';
+      $block_content = \Drupal::moduleHandler()->moduleExists('block_content') ? \Drupal::url('help.page', ['name' => 'block_content']) : '#';
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Block module allows you to place blocks in regions of your installed themes, and configure block settings. For more information, see the <a href=":blocks-documentation">online documentation for the Block module</a>.', array(':blocks-documentation' => 'https://www.drupal.org/documentation/modules/block/')) . '</p>';
+      $output .= '<p>' . t('The Block module allows you to place blocks in regions of your installed themes, and configure block settings. For more information, see the <a href=":blocks-documentation">online documentation for the Block module</a>.', [':blocks-documentation' => 'https://www.drupal.org/documentation/modules/block/']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Placing and moving blocks') . '</dt>';
-      $output .= '<dd>' . t('You can place a new block in a region by selecting <em>Place block</em> on the <a href=":blocks">Block layout page</a>. Once a block is placed, it can be moved to a different region by drag-and-drop or by using the <em>Region</em> drop-down list, and then clicking <em>Save blocks</em>.', array(':blocks' => \Drupal::url('block.admin_display'))) . '</dd>';
+      $output .= '<dd>' . t('You can place a new block in a region by selecting <em>Place block</em> on the <a href=":blocks">Block layout page</a>. Once a block is placed, it can be moved to a different region by drag-and-drop or by using the <em>Region</em> drop-down list, and then clicking <em>Save blocks</em>.', [':blocks' => \Drupal::url('block.admin_display')]) . '</dd>';
       $output .= '<dt>' . t('Toggling between different themes') . '</dt>';
       $output .= '<dd>' . t('Blocks are placed and configured specifically for each theme. The Block layout page opens with the default theme, but you can toggle to other installed themes.') . '</dd>';
       $output .= '<dt>' . t('Demonstrating block regions for a theme') . '</dt>';
-      $output .= '<dd>' . t('You can see where the regions are for the current theme by clicking the <em>Demonstrate block regions</em> link on the <a href=":blocks">Block layout page</a>. Regions are specific to each theme.', array(':blocks' => \Drupal::url('block.admin_display'))) . '</dd>';
+      $output .= '<dd>' . t('You can see where the regions are for the current theme by clicking the <em>Demonstrate block regions</em> link on the <a href=":blocks">Block layout page</a>. Regions are specific to each theme.', [':blocks' => \Drupal::url('block.admin_display')]) . '</dd>';
       $output .= '<dt>' . t('Configuring block settings') . '</dt>';
-      $output .= '<dd>' . t('To change the settings of an individual block click on the <em>Configure</em> link on the <a href=":blocks">Block layout page</a>. The available options vary depending on the module that provides the block. For all blocks you can change the block title and toggle whether to display it.', array(':blocks' => Drupal::url('block.admin_display'))) . '</dd>';
+      $output .= '<dd>' . t('To change the settings of an individual block click on the <em>Configure</em> link on the <a href=":blocks">Block layout page</a>. The available options vary depending on the module that provides the block. For all blocks you can change the block title and toggle whether to display it.', [':blocks' => Drupal::url('block.admin_display')]) . '</dd>';
       $output .= '<dt>' . t('Controlling visibility') . '</dt>';
       $output .= '<dd>' . t('You can control the visibility of a block by restricting it to specific pages, content types, and/or roles by setting the appropriate options under <em>Visibility settings</em> of the block configuration.') . '</dd>';
       $output .= '<dt>' . t('Adding custom blocks') . '</dt>';
-      $output .= '<dd>' . t('You can add custom blocks, if the <em>Custom Block</em> module is installed. For more information, see the <a href=":blockcontent-help">Custom Block help page</a>.', array(':blockcontent-help' => $block_content)) . '</dd>';
+      $output .= '<dd>' . t('You can add custom blocks, if the <em>Custom Block</em> module is installed. For more information, see the <a href=":blockcontent-help">Custom Block help page</a>.', [':blockcontent-help' => $block_content]) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
@@ -43,7 +43,7 @@ function block_help($route_name, RouteMatchInterface $route_match) {
     $demo_theme = $route_match->getParameter('theme') ?: \Drupal::config('system.theme')->get('default');
     $themes = \Drupal::service('theme_handler')->listInfo();
     $output = '<p>' . t('Block placement is specific to each theme on your site. Changes will not be saved until you click <em>Save blocks</em> at the bottom of the page.') . '</p>';
-    $output .= '<p>' . \Drupal::l(t('Demonstrate block regions (@theme)', array('@theme' => $themes[$demo_theme]->info['name'])), new Url('block.admin_demo', array('theme' => $demo_theme))) . '</p>';
+    $output .= '<p>' . \Drupal::l(t('Demonstrate block regions (@theme)', ['@theme' => $themes[$demo_theme]->info['name']]), new Url('block.admin_demo', ['theme' => $demo_theme])) . '</p>';
     return $output;
   }
 }
@@ -52,11 +52,11 @@ function block_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function block_theme() {
-  return array(
-    'block' => array(
+  return [
+    'block' => [
       'render element' => 'elements',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -65,12 +65,12 @@ function block_theme() {
 function block_page_top(array &$page_top) {
   if (\Drupal::routeMatch()->getRouteName() === 'block.admin_demo') {
     $theme = \Drupal::theme()->getActiveTheme()->getName();
-    $page_top['backlink'] = array(
+    $page_top['backlink'] = [
       '#type' => 'link',
       '#title' => t('Exit block region demonstration'),
-      '#options' => array('attributes' => array('class' => array('block-demo-backlink'))),
+      '#options' => ['attributes' => ['class' => ['block-demo-backlink']]],
       '#weight' => -10,
-    );
+    ];
     if (\Drupal::config('system.theme')->get('default') == $theme) {
       $page_top['backlink']['#url'] = Url::fromRoute('block.admin_display');
     }
@@ -108,12 +108,12 @@ function block_themes_installed($theme_list) {
  */
 function block_theme_initialize($theme) {
   // Initialize theme's blocks if none already registered.
-  $has_blocks = \Drupal::entityTypeManager()->getStorage('block')->loadByProperties(array('theme' => $theme));
+  $has_blocks = \Drupal::entityTypeManager()->getStorage('block')->loadByProperties(['theme' => $theme]);
   if (!$has_blocks) {
     $default_theme = \Drupal::config('system.theme')->get('default');
     // Apply only to new theme's visible regions.
     $regions = system_region_list($theme, REGIONS_VISIBLE);
-    $default_theme_blocks = \Drupal::entityTypeManager()->getStorage('block')->loadByProperties(array('theme' => $default_theme));
+    $default_theme_blocks = \Drupal::entityTypeManager()->getStorage('block')->loadByProperties(['theme' => $default_theme]);
     foreach ($default_theme_blocks as $default_theme_block_id => $default_theme_block) {
       if (strpos($default_theme_block_id, $default_theme . '_') === 0) {
         $id = str_replace($default_theme, $theme, $default_theme_block_id);
@@ -161,7 +161,7 @@ function block_rebuild() {
  * Implements hook_theme_suggestions_HOOK().
  */
 function block_theme_suggestions_block(array $variables) {
-  $suggestions = array();
+  $suggestions = [];
 
   $suggestions[] = 'block__' . $variables['elements']['#configuration']['provider'];
   // Hyphens (-) and underscores (_) play a special role in theme suggestions.
diff --git a/core/modules/block/block.post_update.php b/core/modules/block/block.post_update.php
index d3544e8bd6481d30530ef1e9cfcc7503f7e7d0f0..bd0a67c7d8af57055bd36ef1ec61720213b6bf60 100644
--- a/core/modules/block/block.post_update.php
+++ b/core/modules/block/block.post_update.php
@@ -63,10 +63,10 @@ function block_post_update_disable_blocks_with_missing_contexts() {
     $message = t('Encountered an unknown context mapping key coming probably from a contributed or custom module: One or more mappings could not be updated. Please manually review your visibility settings for the following blocks, which are disabled now:');
     $message .= '<ul>';
     foreach ($blocks as $disabled_block_id => $disabled_block) {
-      $message .= '<li>' . t('@label (Visibility: @plugin_ids)', array(
+      $message .= '<li>' . t('@label (Visibility: @plugin_ids)', [
           '@label' => $disabled_block->get('settings')['label'],
           '@plugin_ids' => implode(', ', array_intersect_key($condition_plugin_id_label_map, array_flip(array_keys($block_update_8001[$disabled_block_id]['missing_context_ids']))))
-        )) . '</li>';
+        ]) . '</li>';
     }
     $message .= '</ul>';
 
diff --git a/core/modules/block/src/BlockForm.php b/core/modules/block/src/BlockForm.php
index 42dfbc3b2f6e2f6805da08232366e46c7a693204..b2d180aa4671450b72e59447cd249f0190dddcf1 100644
--- a/core/modules/block/src/BlockForm.php
+++ b/core/modules/block/src/BlockForm.php
@@ -140,57 +140,57 @@ public function form(array $form, FormStateInterface $form_state) {
     $form['visibility'] = $this->buildVisibilityInterface([], $form_state);
 
     // If creating a new block, calculate a safe default machine name.
-    $form['id'] = array(
+    $form['id'] = [
       '#type' => 'machine_name',
       '#maxlength' => 64,
       '#description' => $this->t('A unique name for this block instance. Must be alpha-numeric and underscore separated.'),
       '#default_value' => !$entity->isNew() ? $entity->id() : $this->getUniqueMachineName($entity),
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => '\Drupal\block\Entity\Block::load',
         'replace_pattern' => '[^a-z0-9_.]+',
-        'source' => array('settings', 'label'),
-      ),
+        'source' => ['settings', 'label'],
+      ],
       '#required' => TRUE,
       '#disabled' => !$entity->isNew(),
-    );
+    ];
 
     // Theme settings.
     if ($entity->getTheme()) {
-      $form['theme'] = array(
+      $form['theme'] = [
         '#type' => 'value',
         '#value' => $theme,
-      );
+      ];
     }
     else {
-      $theme_options = array();
+      $theme_options = [];
       foreach ($this->themeHandler->listInfo() as $theme_name => $theme_info) {
         if (!empty($theme_info->status)) {
           $theme_options[$theme_name] = $theme_info->info['name'];
         }
       }
-      $form['theme'] = array(
+      $form['theme'] = [
         '#type' => 'select',
         '#options' => $theme_options,
         '#title' => t('Theme'),
         '#default_value' => $theme,
-        '#ajax' => array(
+        '#ajax' => [
           'callback' => '::themeSwitch',
           'wrapper' => 'edit-block-region-wrapper',
-        ),
-      );
+        ],
+      ];
     }
 
     // Hidden weight setting.
     $weight = $entity->isNew() ? $this->getRequest()->query->get('weight', 0) : $entity->getWeight();
-    $form['weight'] = array(
+    $form['weight'] = [
       '#type' => 'hidden',
       '#default_value' => $weight,
-    );
+    ];
 
     // Region settings.
     $entity_region = $entity->getRegion();
     $region = $entity->isNew() ? $this->getRequest()->query->get('region', $entity_region) : $entity_region;
-    $form['region'] = array(
+    $form['region'] = [
       '#type' => 'select',
       '#title' => $this->t('Region'),
       '#description' => $this->t('Select the region where this block should be displayed.'),
@@ -199,7 +199,7 @@ public function form(array $form, FormStateInterface $form_state) {
       '#options' => system_region_list($theme, REGIONS_VISIBLE),
       '#prefix' => '<div id="edit-block-region-wrapper">',
       '#suffix' => '</div>',
-    );
+    ];
     $form['#attached']['library'][] = 'block/drupal.block.admin';
     return $form;
   }
@@ -360,10 +360,10 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     drupal_set_message($this->t('The block configuration has been saved.'));
     $form_state->setRedirect(
       'block.admin_display_theme',
-      array(
+      [
         'theme' => $form_state->getValue('theme'),
-      ),
-      array('query' => array('block-placement' => Html::getClass($this->entity->id())))
+      ],
+      ['query' => ['block-placement' => Html::getClass($this->entity->id())]]
     );
   }
 
diff --git a/core/modules/block/src/BlockListBuilder.php b/core/modules/block/src/BlockListBuilder.php
index 6e5c968b6c597a63701594b895df692912ba3fe3..37b2e8bfc346ea5f1cfe23cbeff552f9c224c2fe 100644
--- a/core/modules/block/src/BlockListBuilder.php
+++ b/core/modules/block/src/BlockListBuilder.php
@@ -125,15 +125,15 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Build the form tree.
     $form['blocks'] = $this->buildBlocksForm();
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#tree' => FALSE,
       '#type' => 'actions',
-    );
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save blocks'),
       '#button_type' => 'primary',
-    );
+    ];
 
     return $form;
   }
@@ -150,29 +150,29 @@ protected function buildBlocksForm() {
     /** @var \Drupal\block\BlockInterface[] $entities */
     foreach ($entities as $entity_id => $entity) {
       $definition = $entity->getPlugin()->getPluginDefinition();
-      $blocks[$entity->getRegion()][$entity_id] = array(
+      $blocks[$entity->getRegion()][$entity_id] = [
         'label' => $entity->label(),
         'entity_id' => $entity_id,
         'weight' => $entity->getWeight(),
         'entity' => $entity,
         'category' => $definition['category'],
         'status' => $entity->status(),
-      );
+      ];
     }
 
-    $form = array(
+    $form = [
       '#type' => 'table',
-      '#header' => array(
+      '#header' => [
         $this->t('Block'),
         $this->t('Category'),
         $this->t('Region'),
         $this->t('Weight'),
         $this->t('Operations'),
-      ),
-      '#attributes' => array(
+      ],
+      '#attributes' => [
         'id' => 'blocks',
-      ),
-    );
+      ],
+    ];
 
     // Weights range from -delta to +delta, so delta should be at least half
     // of the amount of blocks present. This makes sure all blocks in the same
@@ -188,39 +188,39 @@ protected function buildBlocksForm() {
     // Loop over each region and build blocks.
     $regions = $this->systemRegionList($this->getThemeName(), REGIONS_VISIBLE);
     foreach ($regions as $region => $title) {
-      $form['#tabledrag'][] = array(
+      $form['#tabledrag'][] = [
         'action' => 'match',
         'relationship' => 'sibling',
         'group' => 'block-region-select',
         'subgroup' => 'block-region-' . $region,
         'hidden' => FALSE,
-      );
-      $form['#tabledrag'][] = array(
+      ];
+      $form['#tabledrag'][] = [
         'action' => 'order',
         'relationship' => 'sibling',
         'group' => 'block-weight',
         'subgroup' => 'block-weight-' . $region,
-      );
+      ];
 
-      $form['region-' . $region] = array(
-        '#attributes' => array(
-          'class' => array('region-title', 'region-title-' . $region),
+      $form['region-' . $region] = [
+        '#attributes' => [
+          'class' => ['region-title', 'region-title-' . $region],
           'no_striping' => TRUE,
-        ),
-      );
-      $form['region-' . $region]['title'] = array(
-        '#theme_wrappers' => array(
-          'container' => array(
-            '#attributes' => array('class' => 'region-title__action'),
-          )
-        ),
+        ],
+      ];
+      $form['region-' . $region]['title'] = [
+        '#theme_wrappers' => [
+          'container' => [
+            '#attributes' => ['class' => 'region-title__action'],
+          ]
+        ],
         '#prefix' => $title,
         '#type' => 'link',
         '#title' => $this->t('Place block <span class="visually-hidden">in the %region region</span>', ['%region' => $title]),
         '#url' => Url::fromRoute('block.admin_library', ['theme' => $this->getThemeName()], ['query' => ['region' => $region]]),
-        '#wrapper_attributes' => array(
+        '#wrapper_attributes' => [
           'colspan' => 5,
-        ),
+        ],
         '#attributes' => [
           'class' => ['use-ajax', 'button', 'button--small'],
           'data-dialog-type' => 'modal',
@@ -228,74 +228,74 @@ protected function buildBlocksForm() {
             'width' => 700,
           ]),
         ],
-      );
+      ];
 
-      $form['region-' . $region . '-message'] = array(
-        '#attributes' => array(
-          'class' => array(
+      $form['region-' . $region . '-message'] = [
+        '#attributes' => [
+          'class' => [
             'region-message',
             'region-' . $region . '-message',
             empty($blocks[$region]) ? 'region-empty' : 'region-populated',
-          ),
-        ),
-      );
-      $form['region-' . $region . '-message']['message'] = array(
+          ],
+        ],
+      ];
+      $form['region-' . $region . '-message']['message'] = [
         '#markup' => '<em>' . $this->t('No blocks in this region') . '</em>',
-        '#wrapper_attributes' => array(
+        '#wrapper_attributes' => [
           'colspan' => 5,
-        ),
-      );
+        ],
+      ];
 
       if (isset($blocks[$region])) {
         foreach ($blocks[$region] as $info) {
           $entity_id = $info['entity_id'];
 
-          $form[$entity_id] = array(
-            '#attributes' => array(
-              'class' => array('draggable'),
-            ),
-          );
+          $form[$entity_id] = [
+            '#attributes' => [
+              'class' => ['draggable'],
+            ],
+          ];
           $form[$entity_id]['#attributes']['class'][] = $info['status'] ? 'block-enabled' : 'block-disabled';
           if ($placement && $placement == Html::getClass($entity_id)) {
             $form[$entity_id]['#attributes']['class'][] = 'color-success';
             $form[$entity_id]['#attributes']['class'][] = 'js-block-placed';
           }
-          $form[$entity_id]['info'] = array(
+          $form[$entity_id]['info'] = [
             '#plain_text' => $info['status'] ? $info['label'] : $this->t('@label (disabled)', ['@label' => $info['label']]),
-            '#wrapper_attributes' => array(
-              'class' => array('block'),
-            ),
-          );
-          $form[$entity_id]['type'] = array(
+            '#wrapper_attributes' => [
+              'class' => ['block'],
+            ],
+          ];
+          $form[$entity_id]['type'] = [
             '#markup' => $info['category'],
-          );
-          $form[$entity_id]['region-theme']['region'] = array(
+          ];
+          $form[$entity_id]['region-theme']['region'] = [
             '#type' => 'select',
             '#default_value' => $region,
             '#required' => TRUE,
-            '#title' => $this->t('Region for @block block', array('@block' => $info['label'])),
+            '#title' => $this->t('Region for @block block', ['@block' => $info['label']]),
             '#title_display' => 'invisible',
             '#options' => $regions,
-            '#attributes' => array(
-              'class' => array('block-region-select', 'block-region-' . $region),
-            ),
-            '#parents' => array('blocks', $entity_id, 'region'),
-          );
-          $form[$entity_id]['region-theme']['theme'] = array(
+            '#attributes' => [
+              'class' => ['block-region-select', 'block-region-' . $region],
+            ],
+            '#parents' => ['blocks', $entity_id, 'region'],
+          ];
+          $form[$entity_id]['region-theme']['theme'] = [
             '#type' => 'hidden',
             '#value' => $this->getThemeName(),
-            '#parents' => array('blocks', $entity_id, 'theme'),
-          );
-          $form[$entity_id]['weight'] = array(
+            '#parents' => ['blocks', $entity_id, 'theme'],
+          ];
+          $form[$entity_id]['weight'] = [
             '#type' => 'weight',
             '#default_value' => $info['weight'],
             '#delta' => $weight_delta,
-            '#title' => $this->t('Weight for @block block', array('@block' => $info['label'])),
+            '#title' => $this->t('Weight for @block block', ['@block' => $info['label']]),
             '#title_display' => 'invisible',
-            '#attributes' => array(
-              'class' => array('block-weight', 'block-weight-' . $region),
-            ),
-          );
+            '#attributes' => [
+              'class' => ['block-weight', 'block-weight-' . $region],
+            ],
+          ];
           $form[$entity_id]['operations'] = $this->buildOperations($info['entity']);
         }
       }
@@ -362,7 +362,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $entities = $this->storage->loadMultiple(array_keys($form_state->getValue('blocks')));
     /** @var \Drupal\block\BlockInterface[] $entities */
     foreach ($entities as $entity_id => $entity) {
-      $entity_values = $form_state->getValue(array('blocks', $entity_id));
+      $entity_values = $form_state->getValue(['blocks', $entity_id]);
       $entity->setWeight($entity_values['weight']);
       $entity->setRegion($entity_values['region']);
       $entity->save();
diff --git a/core/modules/block/src/BlockRepository.php b/core/modules/block/src/BlockRepository.php
index 53620a09f16d3c08463d6693c4bd25a8c1abfc5d..4cdd71071d60e1fc7e1b3d3d75ee659ae92aa1c8 100644
--- a/core/modules/block/src/BlockRepository.php
+++ b/core/modules/block/src/BlockRepository.php
@@ -48,10 +48,10 @@ public function __construct(EntityManagerInterface $entity_manager, ThemeManager
   public function getVisibleBlocksPerRegion(array &$cacheable_metadata = []) {
     $active_theme = $this->themeManager->getActiveTheme();
     // Build an array of the region names in the right order.
-    $empty = array_fill_keys($active_theme->getRegions(), array());
+    $empty = array_fill_keys($active_theme->getRegions(), []);
 
-    $full = array();
-    foreach ($this->blockStorage->loadByProperties(array('theme' => $active_theme->getName())) as $block_id => $block) {
+    $full = [];
+    foreach ($this->blockStorage->loadByProperties(['theme' => $active_theme->getName()]) as $block_id => $block) {
       /** @var \Drupal\block\BlockInterface $block */
       $access = $block->access('view', NULL, TRUE);
       $region = $block->getRegion();
diff --git a/core/modules/block/src/BlockViewBuilder.php b/core/modules/block/src/BlockViewBuilder.php
index d3f501bd7a0f71ae4f5d8b66138552d6eb890ea5..3b20d7b25cadfb26f473afd8f34dd75d0ee963cd 100644
--- a/core/modules/block/src/BlockViewBuilder.php
+++ b/core/modules/block/src/BlockViewBuilder.php
@@ -68,16 +68,16 @@ public function buildComponents(array &$build, array $entities, array $displays,
    * {@inheritdoc}
    */
   public function view(EntityInterface $entity, $view_mode = 'full', $langcode = NULL) {
-    $build = $this->viewMultiple(array($entity), $view_mode, $langcode);
+    $build = $this->viewMultiple([$entity], $view_mode, $langcode);
     return reset($build);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function viewMultiple(array $entities = array(), $view_mode = 'full', $langcode = NULL) {
+  public function viewMultiple(array $entities = [], $view_mode = 'full', $langcode = NULL) {
     /** @var \Drupal\block\BlockInterface[] $entities */
-    $build = array();
+    $build = [];
     foreach ($entities as $entity) {
       $entity_id = $entity->id();
       $plugin = $entity->getPlugin();
@@ -87,7 +87,7 @@ public function viewMultiple(array $entities = array(), $view_mode = 'full', $la
 
       // Create the render array for the block as a whole.
       // @see template_preprocess_block().
-      $build[$entity_id] = array(
+      $build[$entity_id] = [
         '#cache' => [
           'keys' => ['entity_view', 'block', $entity->id()],
           'contexts' => Cache::mergeContexts(
@@ -98,7 +98,7 @@ public function viewMultiple(array $entities = array(), $view_mode = 'full', $la
           'max-age' => $plugin->getCacheMaxAge(),
         ],
         '#weight' => $entity->getWeight(),
-      );
+      ];
 
       // Allow altering of cacheability metadata or setting #create_placeholder.
       $this->moduleHandler->alter(['block_build', "block_build_" . $plugin->getBaseId()], $build[$entity_id], $plugin);
@@ -216,7 +216,7 @@ public static function preRender($build) {
       // #contextual_links is information about the *entire* block. Therefore,
       // we must move these properties from $content and merge them into the
       // top-level element.
-      foreach (array('#attributes', '#contextual_links') as $property) {
+      foreach (['#attributes', '#contextual_links'] as $property) {
         if (isset($content[$property])) {
           $build[$property] += $content[$property];
           unset($content[$property]);
@@ -231,10 +231,10 @@ public static function preRender($build) {
       // render cached, so we can avoid the work of having to repeatedly
       // determine whether the block is empty. For instance, modifying or adding
       // entities could cause the block to no longer be empty.
-      $build = array(
+      $build = [
         '#markup' => '',
         '#cache' => $build['#cache'],
-      );
+      ];
       // If $content is not empty, then it contains cacheability metadata, and
       // we must merge it with the existing cacheability metadata. This allows
       // blocks to be empty, yet still bubble cacheability metadata, to indicate
diff --git a/core/modules/block/src/Controller/BlockAddController.php b/core/modules/block/src/Controller/BlockAddController.php
index f983763fcc275439670fc1cdc2525376f2f063fb..973a85995e027689909eb95926e8207e30f77309 100644
--- a/core/modules/block/src/Controller/BlockAddController.php
+++ b/core/modules/block/src/Controller/BlockAddController.php
@@ -22,7 +22,7 @@ class BlockAddController extends ControllerBase {
    */
   public function blockAddConfigureForm($plugin_id, $theme) {
     // Create a block entity.
-    $entity = $this->entityManager()->getStorage('block')->create(array('plugin' => $plugin_id, 'theme' => $theme));
+    $entity = $this->entityManager()->getStorage('block')->create(['plugin' => $plugin_id, 'theme' => $theme]);
 
     return $this->entityFormBuilder()->getForm($entity);
   }
diff --git a/core/modules/block/src/Controller/BlockController.php b/core/modules/block/src/Controller/BlockController.php
index 58417d515f422357ef27f287bd369878abd07902..7398ff98e125c4779086e8d63f87015b0c774b8d 100644
--- a/core/modules/block/src/Controller/BlockController.php
+++ b/core/modules/block/src/Controller/BlockController.php
@@ -74,7 +74,7 @@ public function demo($theme) {
     $page = [
       '#title' => Html::escape($this->themeHandler->getName($theme)),
       '#type' => 'page',
-      '#attached' => array(
+      '#attached' => [
         'drupalSettings' => [
           // The block demonstration page is not marked as an administrative
           // page by \Drupal::service('router.admin_context')->isAdminRoute()
@@ -83,20 +83,20 @@ public function demo($theme) {
           // is an actual administrative page.
           'path' => ['currentPathIsAdmin' => TRUE],
         ],
-        'library' => array(
+        'library' => [
           'block/drupal.block.admin',
-        ),
-      ),
+        ],
+      ],
     ];
 
     // Show descriptions in each visible page region, nothing else.
     $visible_regions = $this->getVisibleRegionNames($theme);
     foreach (array_keys($visible_regions) as $region) {
-      $page[$region]['block_description'] = array(
+      $page[$region]['block_description'] = [
         '#type' => 'inline_template',
         '#template' => '<div class="block-region demo-block">{{ region_name }}</div>',
-        '#context' => array('region_name' => $visible_regions[$region]),
-      );
+        '#context' => ['region_name' => $visible_regions[$region]],
+      ];
     }
 
     return $page;
diff --git a/core/modules/block/src/Controller/CategoryAutocompleteController.php b/core/modules/block/src/Controller/CategoryAutocompleteController.php
index a856670f6c4b9be7adde2e489a03423d91d1bb6c..c95fd477e82504bc3e5865de8cb724a1ccb728ad 100644
--- a/core/modules/block/src/Controller/CategoryAutocompleteController.php
+++ b/core/modules/block/src/Controller/CategoryAutocompleteController.php
@@ -51,10 +51,10 @@ public static function create(ContainerInterface $container) {
    */
   public function autocomplete(Request $request) {
     $typed_category = $request->query->get('q');
-    $matches = array();
+    $matches = [];
     foreach ($this->blockManager->getCategories() as $category) {
       if (stripos($category, $typed_category) === 0) {
-        $matches[] = array('value' => $category, 'label' => Html::escape($category));
+        $matches[] = ['value' => $category, 'label' => Html::escape($category)];
       }
     }
     return new JsonResponse($matches);
diff --git a/core/modules/block/src/Entity/Block.php b/core/modules/block/src/Entity/Block.php
index 63b520543337f1ad73d7008ed2780fcaff19cfb6..a0bbd25c889bad2953d2540c6531fedb2c864253 100644
--- a/core/modules/block/src/Entity/Block.php
+++ b/core/modules/block/src/Entity/Block.php
@@ -66,7 +66,7 @@ class Block extends ConfigEntityBase implements BlockInterface, EntityWithPlugin
    *
    * @var array
    */
-  protected $settings = array();
+  protected $settings = [];
 
   /**
    * The region this block is placed in.
diff --git a/core/modules/block/src/EventSubscriber/BlockPageDisplayVariantSubscriber.php b/core/modules/block/src/EventSubscriber/BlockPageDisplayVariantSubscriber.php
index 2c85587d27febec45db37d32bd43e742b3f53037..5faf8b870ac94f7382b27348457d9ad8daa2887e 100644
--- a/core/modules/block/src/EventSubscriber/BlockPageDisplayVariantSubscriber.php
+++ b/core/modules/block/src/EventSubscriber/BlockPageDisplayVariantSubscriber.php
@@ -27,7 +27,7 @@ public function onSelectPageDisplayVariant(PageDisplayVariantSelectionEvent $eve
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[RenderEvents::SELECT_PAGE_DISPLAY_VARIANT][] = array('onSelectPageDisplayVariant');
+    $events[RenderEvents::SELECT_PAGE_DISPLAY_VARIANT][] = ['onSelectPageDisplayVariant'];
     return $events;
   }
 
diff --git a/core/modules/block/src/Form/BlockDeleteForm.php b/core/modules/block/src/Form/BlockDeleteForm.php
index 63cdb922589eacbe78a57cd3ff1a0107a77924ae..5209b329bf14b8def37a45c91145e714a5b47e21 100644
--- a/core/modules/block/src/Form/BlockDeleteForm.php
+++ b/core/modules/block/src/Form/BlockDeleteForm.php
@@ -28,10 +28,10 @@ public function getConfirmText() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to remove the @entity-type %label?', array(
+    return $this->t('Are you sure you want to remove the @entity-type %label?', [
       '@entity-type' => $this->getEntity()->getEntityType()->getLowercaseLabel(),
       '%label' => $this->getEntity()->label(),
-    ));
+    ]);
   }
 
   /**
@@ -39,10 +39,10 @@ public function getQuestion() {
    */
   protected function getDeletionMessage() {
     $entity = $this->getEntity();
-    return $this->t('The @entity-type %label has been removed.', array(
+    return $this->t('The @entity-type %label has been removed.', [
       '@entity-type' => $entity->getEntityType()->getLowercaseLabel(),
       '%label' => $entity->label(),
-    ));
+    ]);
   }
 
 }
diff --git a/core/modules/block/src/Plugin/Derivative/ThemeLocalTask.php b/core/modules/block/src/Plugin/Derivative/ThemeLocalTask.php
index 74da932003e0f58a155101385e6afd4f5ba81dea..927cb6133fe72ee3ed3f75dcb0d5e477fb698ef4 100644
--- a/core/modules/block/src/Plugin/Derivative/ThemeLocalTask.php
+++ b/core/modules/block/src/Plugin/Derivative/ThemeLocalTask.php
@@ -48,7 +48,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
       if ($this->themeHandler->hasUi($theme_name)) {
         $this->derivatives[$theme_name] = $base_plugin_definition;
         $this->derivatives[$theme_name]['title'] = $theme->info['name'];
-        $this->derivatives[$theme_name]['route_parameters'] = array('theme' => $theme_name);
+        $this->derivatives[$theme_name]['route_parameters'] = ['theme' => $theme_name];
       }
       // Default task!
       if ($default_theme == $theme_name) {
diff --git a/core/modules/block/src/Plugin/migrate/destination/EntityBlock.php b/core/modules/block/src/Plugin/migrate/destination/EntityBlock.php
index c904a377af40a8a584a4febf6911743e008c3c73..537b16073edc54fd8197c2dba10d6630849d36b2 100644
--- a/core/modules/block/src/Plugin/migrate/destination/EntityBlock.php
+++ b/core/modules/block/src/Plugin/migrate/destination/EntityBlock.php
@@ -17,10 +17,10 @@ class EntityBlock extends EntityConfigBase {
    */
   protected function getEntityId(Row $row) {
     // Try to find the block by its plugin ID and theme.
-    $properties = array(
+    $properties = [
       'plugin' => $row->getDestinationProperty('plugin'),
       'theme' => $row->getDestinationProperty('theme'),
-    );
+    ];
     $blocks = array_keys($this->storage->loadByProperties($properties));
     return reset($blocks);
   }
diff --git a/core/modules/block/src/Plugin/migrate/process/BlockPluginId.php b/core/modules/block/src/Plugin/migrate/process/BlockPluginId.php
index cd4bce57e31ee7045e1d456c68f33ba8eacb2ab9..08525674e3414531d0451242177a0cb0fe3f5715 100644
--- a/core/modules/block/src/Plugin/migrate/process/BlockPluginId.php
+++ b/core/modules/block/src/Plugin/migrate/process/BlockPluginId.php
@@ -47,12 +47,12 @@ public function __construct(array $configuration, $plugin_id, array $plugin_defi
    */
   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
     $entity_manager = $container->get('entity.manager');
-    $migration_configuration = array(
-      'migration' => array(
+    $migration_configuration = [
+      'migration' => [
         'd6_custom_block',
         'd7_custom_block',
-      ),
-    );
+      ],
+    ];
     return new static(
       $configuration,
       $plugin_id,
diff --git a/core/modules/block/src/Plugin/migrate/process/BlockRegion.php b/core/modules/block/src/Plugin/migrate/process/BlockRegion.php
index 8aba3ee84cb49074a54276e497dc8ae543b22170..0eb984fd20c604f18faf6762c38673d83af40172 100644
--- a/core/modules/block/src/Plugin/migrate/process/BlockRegion.php
+++ b/core/modules/block/src/Plugin/migrate/process/BlockRegion.php
@@ -43,7 +43,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    * {@inheritdoc}
    */
   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
-    $regions = array();
+    $regions = [];
     foreach ($container->get('theme_handler')->listInfo() as $key => $theme) {
       $regions[$key] = $theme->info['regions'];
     }
diff --git a/core/modules/block/src/Plugin/migrate/process/BlockSettings.php b/core/modules/block/src/Plugin/migrate/process/BlockSettings.php
index 9f11be852b30673d7285683f91e79b5e175a52a7..68e8f186ba2474846db7bea5a7d4554488e67a3b 100644
--- a/core/modules/block/src/Plugin/migrate/process/BlockSettings.php
+++ b/core/modules/block/src/Plugin/migrate/process/BlockSettings.php
@@ -21,7 +21,7 @@ class BlockSettings extends ProcessPluginBase {
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     list($plugin, $delta, $old_settings, $title) = $value;
-    $settings = array();
+    $settings = [];
     $settings['label'] = $title;
     if ($title) {
       $settings['label_display'] = BlockPluginInterface::BLOCK_LABEL_VISIBLE;
diff --git a/core/modules/block/src/Plugin/migrate/process/BlockVisibility.php b/core/modules/block/src/Plugin/migrate/process/BlockVisibility.php
index e38d60be995ff9fa585639a07c793d07af562ac7..88607912541c720c37819c59d7e7037f92daf8bb 100644
--- a/core/modules/block/src/Plugin/migrate/process/BlockVisibility.php
+++ b/core/modules/block/src/Plugin/migrate/process/BlockVisibility.php
@@ -59,12 +59,12 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    * {@inheritdoc}
    */
   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
-    $migration_configuration = array(
-      'migration' => array(
+    $migration_configuration = [
+      'migration' => [
         'd6_user_role',
         'd7_user_role',
-      ),
-    );
+      ],
+    ];
     return new static(
       $configuration,
       $plugin_id,
@@ -80,18 +80,18 @@ public static function create(ContainerInterface $container, array $configuratio
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     list($old_visibility, $pages, $roles) = $value;
 
-    $visibility = array();
+    $visibility = [];
 
     // If the block is assigned to specific roles, add the user_role condition.
     if ($roles) {
-      $visibility['user_role'] = array(
+      $visibility['user_role'] = [
         'id' => 'user_role',
-        'roles' => array(),
-        'context_mapping' => array(
+        'roles' => [],
+        'context_mapping' => [
           'user' => '@user.current_user_context:current_user',
-        ),
+        ],
         'negate' => FALSE,
-      );
+      ];
 
       foreach ($roles as $key => $role_id) {
         $roles[$key] = $this->migrationPlugin->transform($role_id, $migrate_executable, $row, $destination_property);
@@ -104,12 +104,12 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
       if ($old_visibility == 2) {
         // If the PHP module is present, migrate the visibility code unaltered.
         if ($this->moduleHandler->moduleExists('php')) {
-          $visibility['php'] = array(
+          $visibility['php'] = [
             'id' => 'php',
             // PHP code visibility could not be negated in Drupal 6 or 7.
             'negate' => FALSE,
             'php' => $pages,
-          );
+          ];
         }
         // Skip the row if we're configured to. If not, we don't need to do
         // anything else -- the block will simply have no PHP or request_path
@@ -123,11 +123,11 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
         foreach ($paths as $key => $path) {
           $paths[$key] = $path === '<front>' ? $path : '/' . ltrim($path, '/');
         }
-        $visibility['request_path'] = array(
+        $visibility['request_path'] = [
           'id' => 'request_path',
           'negate' => !$old_visibility,
           'pages' => implode("\n", $paths),
-        );
+        ];
       }
     }
 
diff --git a/core/modules/block/src/Plugin/migrate/source/Block.php b/core/modules/block/src/Plugin/migrate/source/Block.php
index b69128369a889db7fa103ded6ea744ff73814ad8..df4c0e9e194e56cb2e84935d714fa9a5a3923d66 100644
--- a/core/modules/block/src/Plugin/migrate/source/Block.php
+++ b/core/modules/block/src/Plugin/migrate/source/Block.php
@@ -81,7 +81,7 @@ protected function initializeIterator() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'bid' => $this->t('The block numeric identifier.'),
       'module' => $this->t('The module providing the block.'),
       'delta' => $this->t('The block\'s delta.'),
@@ -93,7 +93,7 @@ public function fields() {
       'pages' => $this->t('Pages list.'),
       'title' => $this->t('Block title.'),
       'cache' => $this->t('Cache rule.'),
-    );
+    ];
   }
 
   /**
@@ -117,7 +117,7 @@ public function prepareRow(Row $row) {
     $delta = $row->getSourceProperty('delta');
 
     $query = $this->select($this->blockRoleTable, 'br')
-      ->fields('br', array('rid'))
+      ->fields('br', ['rid'])
       ->condition('module', $module)
       ->condition('delta', $delta);
     $query->join($this->userRoleTable, 'ur', 'br.rid = ur.rid');
@@ -125,7 +125,7 @@ public function prepareRow(Row $row) {
       ->fetchCol();
     $row->setSourceProperty('roles', $roles);
 
-    $settings = array();
+    $settings = [];
     switch ($module) {
       case 'aggregator':
         list($type, $id) = explode('-', $delta);
@@ -152,7 +152,7 @@ public function prepareRow(Row $row) {
         $settings['forum']['block_num'] = $this->variableGet('forum_block_num_' . $delta, 5);
         break;
       case 'statistics':
-        foreach (array('statistics_block_top_day_num', 'statistics_block_top_all_num', 'statistics_block_top_last_num') as $name) {
+        foreach (['statistics_block_top_day_num', 'statistics_block_top_all_num', 'statistics_block_top_last_num'] as $name) {
           $settings['statistics'][$name] = $this->variableGet($name, 0);
         }
         break;
diff --git a/core/modules/block/src/Tests/BlockAdminThemeTest.php b/core/modules/block/src/Tests/BlockAdminThemeTest.php
index ab444d5e34d9b9ab3007335097aea2f25129d162..7736e05362d52cc7f9120bd5be018afca15bbe1f 100644
--- a/core/modules/block/src/Tests/BlockAdminThemeTest.php
+++ b/core/modules/block/src/Tests/BlockAdminThemeTest.php
@@ -16,14 +16,14 @@ class BlockAdminThemeTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'contextual');
+  public static $modules = ['block', 'contextual'];
 
   /**
    * Check for the accessibility of the admin theme on the block admin page.
    */
   function testAdminTheme() {
     // Create administrative user.
-    $admin_user = $this->drupalCreateUser(array('administer blocks', 'administer themes'));
+    $admin_user = $this->drupalCreateUser(['administer blocks', 'administer themes']);
     $this->drupalLogin($admin_user);
 
     // Ensure that access to block admin page is denied when theme is not
@@ -32,7 +32,7 @@ function testAdminTheme() {
     $this->assertResponse(403);
 
     // Install admin theme and confirm that tab is accessible.
-    \Drupal::service('theme_handler')->install(array('bartik'));
+    \Drupal::service('theme_handler')->install(['bartik']);
     $edit['admin_theme'] = 'bartik';
     $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
     $this->drupalGet('admin/structure/block/list/bartik');
diff --git a/core/modules/block/src/Tests/BlockLanguageCacheTest.php b/core/modules/block/src/Tests/BlockLanguageCacheTest.php
index fd5871e3a1ba4bf24e4e9e2c6ffb71fc1e5f8f0e..269536d9ce18a354c910ca645b5b490a06c44f52 100644
--- a/core/modules/block/src/Tests/BlockLanguageCacheTest.php
+++ b/core/modules/block/src/Tests/BlockLanguageCacheTest.php
@@ -18,25 +18,25 @@ class BlockLanguageCacheTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'language', 'menu_ui');
+  public static $modules = ['block', 'language', 'menu_ui'];
 
   /**
    * List of langcodes.
    *
    * @var array
    */
-  protected $langcodes = array();
+  protected $langcodes = [];
 
   protected function setUp() {
     parent::setUp();
 
     // Create test languages.
-    $this->langcodes = array(ConfigurableLanguage::load('en'));
+    $this->langcodes = [ConfigurableLanguage::load('en')];
     for ($i = 1; $i < 3; ++$i) {
-      $language = ConfigurableLanguage::create(array(
+      $language = ConfigurableLanguage::create([
         'id' => 'l' . $i,
         'label' => $this->randomString(),
-      ));
+      ]);
       $language->save();
       $this->langcodes[$i] = $language;
     }
@@ -47,16 +47,16 @@ protected function setUp() {
    */
   public function testBlockLinks() {
     // Create admin user to be able to access block admin.
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'administer blocks',
       'access administration pages',
       'administer menu',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
 
     // Create the block cache for all languages.
     foreach ($this->langcodes as $langcode) {
-      $this->drupalGet('admin/structure/block', array('language' => $langcode));
+      $this->drupalGet('admin/structure/block', ['language' => $langcode]);
       $this->clickLinkPartialName('Place block');
     }
 
@@ -64,11 +64,11 @@ public function testBlockLinks() {
     $edit['label'] = $this->randomMachineName();
     $edit['id'] = Unicode::strtolower($edit['label']);
     $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
-    $this->assertText(t('Menu @label has been added.', array('@label' => $edit['label'])));
+    $this->assertText(t('Menu @label has been added.', ['@label' => $edit['label']]));
 
     // Check that the block is listed for all languages.
     foreach ($this->langcodes as $langcode) {
-      $this->drupalGet('admin/structure/block', array('language' => $langcode));
+      $this->drupalGet('admin/structure/block', ['language' => $langcode]);
       $this->clickLinkPartialName('Place block');
       $this->assertText($edit['label']);
     }
diff --git a/core/modules/block/src/Tests/BlockRenderOrderTest.php b/core/modules/block/src/Tests/BlockRenderOrderTest.php
index faf667ed805f90628e53064e655b26cfdb0b2925..d74a90afc474267fa12aec3fc8122876a4bb10ef 100644
--- a/core/modules/block/src/Tests/BlockRenderOrderTest.php
+++ b/core/modules/block/src/Tests/BlockRenderOrderTest.php
@@ -17,14 +17,14 @@ class BlockRenderOrderTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'block');
+  public static $modules = ['node', 'block'];
 
   protected function setUp() {
     parent::setUp();
     // Create a test user.
-    $end_user = $this->drupalCreateUser(array(
+    $end_user = $this->drupalCreateUser([
       'access content',
-    ));
+    ]);
     $this->drupalLogin($end_user);
   }
 
@@ -34,32 +34,32 @@ protected function setUp() {
   function testBlockRenderOrder() {
     // Enable test blocks and place them in the same region.
     $region = 'header';
-    $test_blocks = array(
-      'stark_powered' => array(
+    $test_blocks = [
+      'stark_powered' => [
         'weight' => '-3',
         'id' => 'stark_powered',
         'label' => 'Test block A',
-      ),
-      'stark_by' => array(
+      ],
+      'stark_by' => [
         'weight' => '3',
         'id' => 'stark_by',
         'label' => 'Test block C',
-      ),
-      'stark_drupal' => array(
+      ],
+      'stark_drupal' => [
         'weight' => '3',
         'id' => 'stark_drupal',
         'label' => 'Test block B',
-      ),
-    );
+      ],
+    ];
 
     // Place the test blocks.
     foreach ($test_blocks as $test_block) {
-      $this->drupalPlaceBlock('system_powered_by_block', array(
+      $this->drupalPlaceBlock('system_powered_by_block', [
         'label' => $test_block['label'],
         'region' => $region,
         'weight' => $test_block['weight'],
         'id' => $test_block['id'],
-      ));
+      ]);
     }
 
     $this->drupalGet('');
diff --git a/core/modules/block/src/Tests/BlockSystemBrandingTest.php b/core/modules/block/src/Tests/BlockSystemBrandingTest.php
index f3dfa3cdb421c9074260c34573a425809f1a96f0..b5025e8017789055388bd6f1c8c7c6e13cdd4e05 100644
--- a/core/modules/block/src/Tests/BlockSystemBrandingTest.php
+++ b/core/modules/block/src/Tests/BlockSystemBrandingTest.php
@@ -14,7 +14,7 @@ class BlockSystemBrandingTest extends BlockTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'system');
+  public static $modules = ['block', 'system'];
 
   /**
    * {@inheritdoc}
@@ -26,7 +26,7 @@ protected function setUp() {
       ->set('slogan', 'Community plumbing')
       ->save();
     // Add the system branding block to the page.
-    $this->drupalPlaceBlock('system_branding_block', array('region' => 'header', 'id' => 'site-branding'));
+    $this->drupalPlaceBlock('system_branding_block', ['region' => 'header', 'id' => 'site-branding']);
   }
 
   /**
diff --git a/core/modules/block/src/Tests/BlockTest.php b/core/modules/block/src/Tests/BlockTest.php
index 57f46476445ede56e8eb290af56ce3c3d9bdfc76..e6066c4fd270c0fe89accbc80be3bb72c66316f3 100644
--- a/core/modules/block/src/Tests/BlockTest.php
+++ b/core/modules/block/src/Tests/BlockTest.php
@@ -24,12 +24,12 @@ function testBlockVisibility() {
     $title = $this->randomMachineName(8);
     // Enable a standard block.
     $default_theme = $this->config('system.theme')->get('default');
-    $edit = array(
+    $edit = [
       'id' => strtolower($this->randomMachineName(8)),
       'region' => 'sidebar_first',
       'settings[label]' => $title,
       'settings[label_display]' => TRUE,
-    );
+    ];
     // Set the block to be hidden on any user path, and to be shown only to
     // authenticated users.
     $edit['visibility[request_path][pages]'] = '/user*';
@@ -69,11 +69,11 @@ public function testBlockToggleVisibility() {
     $title = $this->randomMachineName(8);
     // Enable a standard block.
     $default_theme = $this->config('system.theme')->get('default');
-    $edit = array(
+    $edit = [
       'id' => strtolower($this->randomMachineName(8)),
       'region' => 'sidebar_first',
       'settings[label]' => $title,
-    );
+    ];
     $block_id = $edit['id'];
     // Set the block to be shown only to authenticated users.
     $edit['visibility[user_role][roles][' . RoleInterface::AUTHENTICATED_ID . ']'] = TRUE;
@@ -105,12 +105,12 @@ function testBlockVisibilityListedEmpty() {
     $title = $this->randomMachineName(8);
     // Enable a standard block.
     $default_theme = $this->config('system.theme')->get('default');
-    $edit = array(
+    $edit = [
       'id' => strtolower($this->randomMachineName(8)),
       'region' => 'sidebar_first',
       'settings[label]' => $title,
       'visibility[request_path][negate]' => TRUE,
-    );
+    ];
     // Set the block to be hidden on any user path, and to be shown only to
     // authenticated users.
     $this->drupalPostForm('admin/structure/block/add/' . $block_name . '/' . $default_theme, $edit, t('Save block'));
@@ -185,7 +185,7 @@ function testBlock() {
     $this->clickLink('Disable');
 
     // Select the 'Powered by Drupal' block to be configured and moved.
-    $block = array();
+    $block = [];
     $block['id'] = 'system_powered_by_block';
     $block['settings[label]'] = $this->randomMachineName(8);
     $block['settings[label_display]'] = TRUE;
@@ -193,7 +193,7 @@ function testBlock() {
     $block['region'] = 'header';
 
     // Set block title to confirm that interface works and override any custom titles.
-    $this->drupalPostForm('admin/structure/block/add/' . $block['id'] . '/' . $block['theme'], array('settings[label]' => $block['settings[label]'], 'settings[label_display]' => $block['settings[label_display]'], 'id' => $block['id'], 'region' => $block['region']), t('Save block'));
+    $this->drupalPostForm('admin/structure/block/add/' . $block['id'] . '/' . $block['theme'], ['settings[label]' => $block['settings[label]'], 'settings[label_display]' => $block['settings[label_display]'], 'id' => $block['id'], 'region' => $block['region']], t('Save block'));
     $this->assertText(t('The block configuration has been saved.'), 'Block title set.');
     // Check to see if the block was created by checking its configuration.
     $instance = Block::load($block['id']);
@@ -217,23 +217,23 @@ function testBlock() {
     $this->assertNoText(t($block['settings[label]']));
     // Check for <div id="block-my-block-instance-name"> if the machine name
     // is my_block_instance_name.
-    $xpath = $this->buildXPathQuery('//div[@id=:id]/*', array(':id' => 'block-' . str_replace('_', '-', strtolower($block['id']))));
+    $xpath = $this->buildXPathQuery('//div[@id=:id]/*', [':id' => 'block-' . str_replace('_', '-', strtolower($block['id']))]);
     $this->assertNoFieldByXPath($xpath, FALSE, 'Block found in no regions.');
 
     // Test deleting the block from the edit form.
     $this->drupalGet('admin/structure/block/manage/' . $block['id']);
     $this->clickLink(t('Remove block'));
-    $this->assertRaw(t('Are you sure you want to remove the block @name?', array('@name' => $block['settings[label]'])));
-    $this->drupalPostForm(NULL, array(), t('Remove'));
-    $this->assertRaw(t('The block %name has been removed.', array('%name' => $block['settings[label]'])));
+    $this->assertRaw(t('Are you sure you want to remove the block @name?', ['@name' => $block['settings[label]']]));
+    $this->drupalPostForm(NULL, [], t('Remove'));
+    $this->assertRaw(t('The block %name has been removed.', ['%name' => $block['settings[label]']]));
 
     // Test deleting a block via "Configure block" link.
     $block = $this->drupalPlaceBlock('system_powered_by_block');
-    $this->drupalGet('admin/structure/block/manage/' . $block->id(), array('query' => array('destination' => 'admin')));
+    $this->drupalGet('admin/structure/block/manage/' . $block->id(), ['query' => ['destination' => 'admin']]);
     $this->clickLink(t('Remove block'));
-    $this->assertRaw(t('Are you sure you want to remove the block @name?', array('@name' => $block->label())));
-    $this->drupalPostForm(NULL, array(), t('Remove'));
-    $this->assertRaw(t('The block %name has been removed.', array('%name' => $block->label())));
+    $this->assertRaw(t('Are you sure you want to remove the block @name?', ['@name' => $block->label()]));
+    $this->drupalPostForm(NULL, [], t('Remove'));
+    $this->assertRaw(t('The block %name has been removed.', ['%name' => $block->label()]));
     $this->assertUrl('admin');
     $this->assertNoRaw($block->id());
   }
@@ -249,7 +249,7 @@ public function testBlockThemeSelector() {
       $this->drupalGet('admin/structure/block/list/' . $theme);
       $this->assertTitle(t('Block layout') . ' | Drupal');
       // Select the 'Powered by Drupal' block to be placed.
-      $block = array();
+      $block = [];
       $block['id'] = strtolower($this->randomMachineName());
       $block['theme'] = $theme;
       $block['region'] = 'content';
@@ -260,7 +260,7 @@ public function testBlockThemeSelector() {
       // Set the default theme and ensure the block is placed.
       $theme_settings->set('default', $theme)->save();
       $this->drupalGet('');
-      $elements = $this->xpath('//div[@id = :id]', array(':id' => Html::getUniqueId('block-' . $block['id'])));
+      $elements = $this->xpath('//div[@id = :id]', [':id' => Html::getUniqueId('block-' . $block['id'])]);
       $this->assertTrue(!empty($elements), 'The block was found.');
     }
   }
@@ -270,11 +270,11 @@ public function testBlockThemeSelector() {
    */
   function testThemeName() {
     // Enable the help block.
-    $this->drupalPlaceBlock('help_block', array('region' => 'help'));
+    $this->drupalPlaceBlock('help_block', ['region' => 'help']);
     $this->drupalPlaceBlock('local_tasks_block');
     // Explicitly set the default and admin themes.
     $theme = 'block_test_specialchars_theme';
-    \Drupal::service('theme_handler')->install(array($theme));
+    \Drupal::service('theme_handler')->install([$theme]);
     \Drupal::service('router.builder')->rebuild();
     $this->drupalGet('admin/structure/block');
     $this->assertEscaped('<"Cat" & \'Mouse\'>');
@@ -292,20 +292,20 @@ function testHideBlockTitle() {
     $id = strtolower($this->randomMachineName(8));
     // Enable a standard block.
     $default_theme = $this->config('system.theme')->get('default');
-    $edit = array(
+    $edit = [
       'id' => $id,
       'region' => 'sidebar_first',
       'settings[label]' => $title,
-    );
+    ];
     $this->drupalPostForm('admin/structure/block/add/' . $block_name . '/' . $default_theme, $edit, t('Save block'));
     $this->assertText('The block configuration has been saved.', 'Block was saved');
 
     $this->drupalGet('user');
     $this->assertNoText($title, 'Block title was not displayed by default.');
 
-    $edit = array(
+    $edit = [
       'settings[label_display]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/block/manage/' . $id, $edit, t('Save block'));
     $this->assertText('The block configuration has been saved.', 'Block was saved');
 
@@ -330,24 +330,24 @@ function testHideBlockTitle() {
    */
   function moveBlockToRegion(array $block, $region) {
     // Set the created block to a specific region.
-    $block += array('theme' => $this->config('system.theme')->get('default'));
-    $edit = array();
+    $block += ['theme' => $this->config('system.theme')->get('default')];
+    $edit = [];
     $edit['blocks[' . $block['id'] . '][region]'] = $region;
     $this->drupalPostForm('admin/structure/block', $edit, t('Save blocks'));
 
     // Confirm that the block was moved to the proper region.
-    $this->assertText(t('The block settings have been updated.'), format_string('Block successfully moved to %region_name region.', array( '%region_name' => $region)));
+    $this->assertText(t('The block settings have been updated.'), format_string('Block successfully moved to %region_name region.', [ '%region_name' => $region]));
 
     // Confirm that the block is being displayed.
     $this->drupalGet('');
     $this->assertText(t($block['settings[label]']), 'Block successfully being displayed on the page.');
 
     // Confirm that the custom block was found at the proper region.
-    $xpath = $this->buildXPathQuery('//div[@class=:region-class]//div[@id=:block-id]/*', array(
+    $xpath = $this->buildXPathQuery('//div[@class=:region-class]//div[@id=:block-id]/*', [
       ':region-class' => 'region region-' . Html::getClass($region),
       ':block-id' => 'block-' . str_replace('_', '-', strtolower($block['id'])),
-    ));
-    $this->assertFieldByXPath($xpath, NULL, t('Block found in %region_name region.', array('%region_name' => Html::getClass($region))));
+    ]);
+    $this->assertFieldByXPath($xpath, NULL, t('Block found in %region_name region.', ['%region_name' => Html::getClass($region)]));
   }
 
   /**
@@ -367,7 +367,7 @@ public function testBlockCacheTags() {
     $config->save();
 
     // Place the "Powered by Drupal" block.
-    $block = $this->drupalPlaceBlock('system_powered_by_block', array('id' => 'powered'));
+    $block = $this->drupalPlaceBlock('system_powered_by_block', ['id' => 'powered']);
 
     // Prime the page cache.
     $this->drupalGet('<front>');
@@ -377,26 +377,26 @@ public function testBlockCacheTags() {
     // both the page and block caches.
     $this->drupalGet('<front>');
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT');
-    $cid_parts = array(\Drupal::url('<front>', array(), array('absolute' => TRUE)), 'html');
+    $cid_parts = [\Drupal::url('<front>', [], ['absolute' => TRUE]), 'html'];
     $cid = implode(':', $cid_parts);
     $cache_entry = \Drupal::cache('render')->get($cid);
-    $expected_cache_tags = array(
+    $expected_cache_tags = [
       'config:block_list',
       'block_view',
       'config:block.block.powered',
       'config:user.role.anonymous',
       'http_response',
       'rendered',
-    );
+    ];
     sort($expected_cache_tags);
     $keys = \Drupal::service('cache_contexts_manager')->convertTokensToKeys(['languages:language_interface', 'theme', 'user.permissions'])->getKeys();
     $this->assertIdentical($cache_entry->tags, $expected_cache_tags);
     $cache_entry = \Drupal::cache('render')->get('entity_view:block:powered:' . implode(':', $keys));
-    $expected_cache_tags = array(
+    $expected_cache_tags = [
       'block_view',
       'config:block.block.powered',
       'rendered',
-    );
+    ];
     sort($expected_cache_tags);
     $this->assertIdentical($cache_entry->tags, $expected_cache_tags);
 
@@ -411,17 +411,17 @@ public function testBlockCacheTags() {
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT');
 
     // Place the "Powered by Drupal" block another time; verify a cache miss.
-    $block_2 = $this->drupalPlaceBlock('system_powered_by_block', array('id' => 'powered-2'));
+    $block_2 = $this->drupalPlaceBlock('system_powered_by_block', ['id' => 'powered-2']);
     $this->drupalGet('<front>');
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS');
 
     // Verify a cache hit, but also the presence of the correct cache tags.
     $this->drupalGet('<front>');
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT');
-    $cid_parts = array(\Drupal::url('<front>', array(), array('absolute' => TRUE)), 'html');
+    $cid_parts = [\Drupal::url('<front>', [], ['absolute' => TRUE]), 'html'];
     $cid = implode(':', $cid_parts);
     $cache_entry = \Drupal::cache('render')->get($cid);
-    $expected_cache_tags = array(
+    $expected_cache_tags = [
       'config:block_list',
       'block_view',
       'config:block.block.powered',
@@ -429,23 +429,23 @@ public function testBlockCacheTags() {
       'config:user.role.anonymous',
       'http_response',
       'rendered',
-    );
+    ];
     sort($expected_cache_tags);
     $this->assertEqual($cache_entry->tags, $expected_cache_tags);
-    $expected_cache_tags = array(
+    $expected_cache_tags = [
       'block_view',
       'config:block.block.powered',
       'rendered',
-    );
+    ];
     sort($expected_cache_tags);
     $keys = \Drupal::service('cache_contexts_manager')->convertTokensToKeys(['languages:language_interface', 'theme', 'user.permissions'])->getKeys();
     $cache_entry = \Drupal::cache('render')->get('entity_view:block:powered:' . implode(':', $keys));
     $this->assertIdentical($cache_entry->tags, $expected_cache_tags);
-    $expected_cache_tags = array(
+    $expected_cache_tags = [
       'block_view',
       'config:block.block.powered-2',
       'rendered',
-    );
+    ];
     sort($expected_cache_tags);
     $keys = \Drupal::service('cache_contexts_manager')->convertTokensToKeys(['languages:language_interface', 'theme', 'user.permissions'])->getKeys();
     $cache_entry = \Drupal::cache('render')->get('entity_view:block:powered-2:' . implode(':', $keys));
@@ -456,7 +456,7 @@ public function testBlockCacheTags() {
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT');
 
     // Delete the "Powered by Drupal" blocks; verify a cache miss.
-    entity_delete_multiple('block', array('powered', 'powered-2'));
+    entity_delete_multiple('block', ['powered', 'powered-2']);
     $this->drupalGet('<front>');
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS');
   }
diff --git a/core/modules/block/src/Tests/BlockTestBase.php b/core/modules/block/src/Tests/BlockTestBase.php
index 970de5266efe9410660cd82579b2642e5e7c88a5..71f0ae6cffdd9332dad7bcaf52dfda4f28b7f88e 100644
--- a/core/modules/block/src/Tests/BlockTestBase.php
+++ b/core/modules/block/src/Tests/BlockTestBase.php
@@ -15,7 +15,7 @@ abstract class BlockTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'filter', 'test_page_test', 'help', 'block_test');
+  public static $modules = ['block', 'filter', 'test_page_test', 'help', 'block_test'];
 
   /**
    * A list of theme regions to test.
@@ -38,31 +38,31 @@ protected function setUp() {
     $this->config('system.site')->set('page.front', '/test-page')->save();
 
     // Create Full HTML text format.
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
-    ));
+    ]);
     $full_html_format->save();
 
     // Create and log in an administrative user having access to the Full HTML
     // text format.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer blocks',
       $full_html_format->getPermissionName(),
       'access administration pages',
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
 
     // Define the existing regions.
-    $this->regions = array(
+    $this->regions = [
       'header',
       'sidebar_first',
       'content',
       'sidebar_second',
       'footer',
-    );
+    ];
     $block_storage = $this->container->get('entity_type.manager')->getStorage('block');
-    $blocks = $block_storage->loadByProperties(array('theme' => $this->config('system.theme')->get('default')));
+    $blocks = $block_storage->loadByProperties(['theme' => $this->config('system.theme')->get('default')]);
     foreach ($blocks as $block) {
       $block->delete();
     }
diff --git a/core/modules/block/src/Tests/BlockUiTest.php b/core/modules/block/src/Tests/BlockUiTest.php
index 65183cdce629f43e1b49343bd4840939513ece6f..5f18ae162b230b63285c9a25b9bbdd797399e5d3 100644
--- a/core/modules/block/src/Tests/BlockUiTest.php
+++ b/core/modules/block/src/Tests/BlockUiTest.php
@@ -17,7 +17,7 @@ class BlockUiTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test', 'help', 'condition_test');
+  public static $modules = ['block', 'block_test', 'help', 'condition_test'];
 
   protected $regions;
 
@@ -43,30 +43,30 @@ class BlockUiTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
     // Create and log in an administrative user.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer blocks',
       'access administration pages',
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
 
     // Enable some test blocks.
-    $this->blockValues = array(
-      array(
+    $this->blockValues = [
+      [
         'label' => 'Tools',
         'tr' => '5',
         'plugin_id' => 'system_menu_block:tools',
-        'settings' => array('region' => 'sidebar_second', 'id' => 'tools'),
+        'settings' => ['region' => 'sidebar_second', 'id' => 'tools'],
         'test_weight' => '-1',
-      ),
-      array(
+      ],
+      [
         'label' => 'Powered by Drupal',
         'tr' => '16',
         'plugin_id' => 'system_powered_by_block',
-        'settings' => array('region' => 'footer', 'id' => 'powered'),
+        'settings' => ['region' => 'footer', 'id' => 'powered'],
         'test_weight' => '0',
-      ),
-    );
-    $this->blocks = array();
+      ],
+    ];
+    $this->blocks = [];
     foreach ($this->blockValues as $values) {
       $this->blocks[] = $this->drupalPlaceBlock($values['plugin_id'], $values['settings']);
     }
@@ -76,13 +76,13 @@ protected function setUp() {
    * Test block demo page exists and functions correctly.
    */
   public function testBlockDemoUiPage() {
-    $this->drupalPlaceBlock('help_block', array('region' => 'help'));
+    $this->drupalPlaceBlock('help_block', ['region' => 'help']);
     $this->drupalGet('admin/structure/block');
-    $this->clickLink(t('Demonstrate block regions (@theme)', array('@theme' => 'Classy')));
-    $elements = $this->xpath('//div[contains(@class, "region-highlighted")]/div[contains(@class, "block-region") and contains(text(), :title)]', array(':title' => 'Highlighted'));
+    $this->clickLink(t('Demonstrate block regions (@theme)', ['@theme' => 'Classy']));
+    $elements = $this->xpath('//div[contains(@class, "region-highlighted")]/div[contains(@class, "block-region") and contains(text(), :title)]', [':title' => 'Highlighted']);
     $this->assertTrue(!empty($elements), 'Block demo regions are shown.');
 
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
     $this->drupalGet('admin/structure/block/demo/test_theme');
     $this->assertEscaped('<strong>Test theme</strong>');
 
@@ -163,11 +163,11 @@ function testBlockAdminUiPage() {
    * Tests the block categories on the listing page.
    */
   public function testCandidateBlockList() {
-    $arguments = array(
+    $arguments = [
       ':title' => 'Display message',
       ':category' => 'Block test',
       ':href' => 'admin/structure/block/add/test_block_instantiation/classy',
-    );
+    ];
     $pattern = '//tr[.//td/div[text()=:title] and .//td[text()=:category] and .//td//a[contains(@href, :href)]]';
 
     $this->drupalGet('admin/structure/block');
@@ -190,11 +190,11 @@ public function testCandidateBlockList() {
    * Tests the behavior of unsatisfied context-aware blocks.
    */
   public function testContextAwareUnsatisfiedBlocks() {
-    $arguments = array(
+    $arguments = [
       ':category' => 'Block test',
       ':href' => 'admin/structure/block/add/test_context_aware_unsatisfied/classy',
       ':text' => 'Test context-aware unsatisfied block',
-    );
+    ];
 
     $this->drupalGet('admin/structure/block');
     $this->clickLinkPartialName('Place block');
@@ -215,11 +215,11 @@ public function testContextAwareBlocks() {
     $this->assertNoRaw($expected_text);
 
     $block_url = 'admin/structure/block/add/test_context_aware/classy';
-    $arguments = array(
+    $arguments = [
       ':title' => 'Test context-aware block',
       ':category' => 'Block test',
       ':href' => $block_url,
-    );
+    ];
     $pattern = '//tr[.//td/div[text()=:title] and .//td[text()=:category] and .//td//a[contains(@href, :href)]]';
 
     $this->drupalGet('admin/structure/block');
@@ -282,7 +282,7 @@ public function testMachineNameSuggestion() {
    */
   public function testBlockPlacementIndicator() {
     // Select the 'Powered by Drupal' block to be placed.
-    $block = array();
+    $block = [];
     $block['id'] = strtolower($this->randomMachineName());
     $block['theme'] = 'classy';
     $block['region'] = 'content';
@@ -292,7 +292,7 @@ public function testBlockPlacementIndicator() {
     $this->assertUrl('admin/structure/block/list/classy?block-placement=' . Html::getClass($block['id']));
 
     // Resaving the block page will remove the block indicator.
-    $this->drupalPostForm(NULL, array(), t('Save blocks'));
+    $this->drupalPostForm(NULL, [], t('Save blocks'));
     $this->assertUrl('admin/structure/block/list/classy');
   }
 
diff --git a/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php b/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php
index 218832d6c82d3a6df8e9970ad696819ac026a00d..9f3590c7fa53601562803757f9271dae3a370a83 100644
--- a/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php
+++ b/core/modules/block/src/Tests/NonDefaultBlockAdminTest.php
@@ -16,7 +16,7 @@ class NonDefaultBlockAdminTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block');
+  public static $modules = ['block'];
 
   /**
    * {@inheritdoc}
@@ -31,10 +31,10 @@ protected function setUp() {
    * Test non-default theme admin.
    */
   function testNonDefaultBlockAdmin() {
-    $admin_user = $this->drupalCreateUser(array('administer blocks', 'administer themes'));
+    $admin_user = $this->drupalCreateUser(['administer blocks', 'administer themes']);
     $this->drupalLogin($admin_user);
     $new_theme = 'bartik';
-    \Drupal::service('theme_handler')->install(array($new_theme));
+    \Drupal::service('theme_handler')->install([$new_theme]);
     $this->drupalGet('admin/structure/block/list/' . $new_theme);
     $this->assertText('Bartik(' . t('active tab') . ')', 'Tab for non-default theme found.');
   }
diff --git a/core/modules/block/src/Tests/Views/DisplayBlockTest.php b/core/modules/block/src/Tests/Views/DisplayBlockTest.php
index 31f531cc22d494ab3342d2d5ae1fcd8ec1eb8b73..3d3584579acc1c06e914499e2399407ec7411a3c 100644
--- a/core/modules/block/src/Tests/Views/DisplayBlockTest.php
+++ b/core/modules/block/src/Tests/Views/DisplayBlockTest.php
@@ -26,19 +26,19 @@ class DisplayBlockTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'block_test_views', 'test_page_test', 'contextual', 'views_ui');
+  public static $modules = ['node', 'block_test_views', 'test_page_test', 'contextual', 'views_ui'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view_block', 'test_view_block2');
+  public static $testViews = ['test_view_block', 'test_view_block2'];
 
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('block_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['block_test_views']);
     $this->enableViewsTestModule();
   }
 
@@ -46,10 +46,10 @@ protected function setUp() {
    * Tests default and custom block categories.
    */
   public function testBlockCategory() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer views', 'administer blocks')));
+    $this->drupalLogin($this->drupalCreateUser(['administer views', 'administer blocks']));
 
     // Create a new view in the UI.
-    $edit = array();
+    $edit = [];
     $edit['label'] = $this->randomString();
     $edit['id'] = strtolower($this->randomMachineName());
     $edit['show[wizard_key]'] = 'standard:views_test_data';
@@ -62,20 +62,20 @@ public function testBlockCategory() {
 
     // Test that the block was given a default category corresponding to its
     // base table.
-    $arguments = array(
-      ':href' => \Drupal::Url('block.admin_add', array(
+    $arguments = [
+      ':href' => \Drupal::Url('block.admin_add', [
         'plugin_id' => 'views_block:' . $edit['id'] . '-block_1',
         'theme' => 'classy',
-      )),
+      ]),
       ':category' => t('Lists (Views)'),
-    );
+    ];
     $this->drupalGet('admin/structure/block');
     $this->clickLinkPartialName('Place block');
     $elements = $this->xpath($pattern, $arguments);
     $this->assertTrue(!empty($elements), 'The test block appears in the category for its base table.');
 
     // Duplicate the block before changing the category.
-    $this->drupalPostForm('admin/structure/views/view/' . $edit['id'] . '/edit/block_1', array(), t('Duplicate @display_title', array('@display_title' => 'Block')));
+    $this->drupalPostForm('admin/structure/views/view/' . $edit['id'] . '/edit/block_1', [], t('Duplicate @display_title', ['@display_title' => 'Block']));
     $this->assertUrl('admin/structure/views/view/' . $edit['id'] . '/edit/block_2');
 
     // Change the block category to a random string.
@@ -84,13 +84,13 @@ public function testBlockCategory() {
     $this->assertTrue(!empty($link));
     $this->clickLink(t('Lists (Views)'));
     $category = $this->randomString();
-    $this->drupalPostForm(NULL, array('block_category' => $category), t('Apply'));
+    $this->drupalPostForm(NULL, ['block_category' => $category], t('Apply'));
 
     // Duplicate the block after changing the category.
-    $this->drupalPostForm(NULL, array(), t('Duplicate @display_title', array('@display_title' => 'Block')));
+    $this->drupalPostForm(NULL, [], t('Duplicate @display_title', ['@display_title' => 'Block']));
     $this->assertUrl('admin/structure/views/view/' . $edit['id'] . '/edit/block_3');
 
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Test that the blocks are listed under the correct categories.
     $arguments[':category'] = $category;
@@ -99,23 +99,23 @@ public function testBlockCategory() {
     $elements = $this->xpath($pattern, $arguments);
     $this->assertTrue(!empty($elements), 'The test block appears in the custom category.');
 
-    $arguments = array(
-      ':href' => \Drupal::Url('block.admin_add', array(
+    $arguments = [
+      ':href' => \Drupal::Url('block.admin_add', [
         'plugin_id' => 'views_block:' . $edit['id'] . '-block_2',
         'theme' => 'classy',
-      )),
+      ]),
       ':category' => t('Lists (Views)'),
-    );
+    ];
     $elements = $this->xpath($pattern, $arguments);
     $this->assertTrue(!empty($elements), 'The first duplicated test block remains in the original category.');
 
-    $arguments = array(
-      ':href' => \Drupal::Url('block.admin_add', array(
+    $arguments = [
+      ':href' => \Drupal::Url('block.admin_add', [
         'plugin_id' => 'views_block:' . $edit['id'] . '-block_3',
         'theme' => 'classy',
-      )),
+      ]),
       ':category' => $category,
-    );
+    ];
     $elements = $this->xpath($pattern, $arguments);
     $this->assertTrue(!empty($elements), 'The second duplicated test block appears in the custom category.');
   }
@@ -126,13 +126,13 @@ public function testBlockCategory() {
   public function testDeleteBlockDisplay() {
     // To test all combinations possible we first place create two instances
     // of the block display of the first view.
-    $block_1 = $this->drupalPlaceBlock('views_block:test_view_block-block_1', array('label' => 'test_view_block-block_1:1'));
-    $block_2 = $this->drupalPlaceBlock('views_block:test_view_block-block_1', array('label' => 'test_view_block-block_1:2'));
+    $block_1 = $this->drupalPlaceBlock('views_block:test_view_block-block_1', ['label' => 'test_view_block-block_1:1']);
+    $block_2 = $this->drupalPlaceBlock('views_block:test_view_block-block_1', ['label' => 'test_view_block-block_1:2']);
 
     // Then we add one instance of blocks for each of the two displays of the
     // second view.
-    $block_3 = $this->drupalPlaceBlock('views_block:test_view_block2-block_1', array('label' => 'test_view_block2-block_1'));
-    $block_4 = $this->drupalPlaceBlock('views_block:test_view_block2-block_2', array('label' => 'test_view_block2-block_2'));
+    $block_3 = $this->drupalPlaceBlock('views_block:test_view_block2-block_1', ['label' => 'test_view_block2-block_1']);
+    $block_4 = $this->drupalPlaceBlock('views_block:test_view_block2-block_2', ['label' => 'test_view_block2-block_2']);
 
     $this->drupalGet('test-page');
     $this->assertBlockAppears($block_1);
@@ -177,7 +177,7 @@ public function testDeleteBlockDisplay() {
    * Test the block form for a Views block.
    */
   public function testViewsBlockForm() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer blocks')));
+    $this->drupalLogin($this->drupalCreateUser(['administer blocks']));
     $default_theme = $this->config('system.theme')->get('default');
     $this->drupalGet('admin/structure/block/add/views_block:test_view_block-block_1/' . $default_theme);
     $elements = $this->xpath('//input[@name="label"]');
@@ -239,7 +239,7 @@ public function testViewsBlockForm() {
    */
   public function testBlockRendering() {
     // Create a block and set a custom title.
-    $block = $this->drupalPlaceBlock('views_block:test_view_block-block_1', array('label' => 'test_view_block-block_1:1', 'views_label' => 'Custom title'));
+    $block = $this->drupalPlaceBlock('views_block:test_view_block-block_1', ['label' => 'test_view_block-block_1:1', 'views_label' => 'Custom title']);
     $this->drupalGet('');
 
     $result = $this->xpath('//div[contains(@class, "region-sidebar-first")]/div[contains(@class, "block-views")]/h2');
@@ -276,7 +276,7 @@ public function testBlockEmptyRendering() {
     $view = View::load('test_view_block');
     $view->invalidateCaches();
 
-    $block = $this->drupalPlaceBlock('views_block:test_view_block-block_1', array('label' => 'test_view_block-block_1:1', 'views_label' => 'Custom title'));
+    $block = $this->drupalPlaceBlock('views_block:test_view_block-block_1', ['label' => 'test_view_block-block_1:1', 'views_label' => 'Custom title']);
     $this->drupalGet('');
     $this->assertEqual(1, count($this->xpath('//div[contains(@class, "block-views-blocktest-view-block-block-1")]')));
 
@@ -349,7 +349,7 @@ public function testBlockEmptyRendering() {
    * Tests the contextual links on a Views block.
    */
   public function testBlockContextualLinks() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer views', 'access contextual links', 'administer blocks')));
+    $this->drupalLogin($this->drupalCreateUser(['administer views', 'access contextual links', 'administer blocks']));
     $block = $this->drupalPlaceBlock('views_block:test_view_block-block_1');
     $cached_block = $this->drupalPlaceBlock('views_block:test_view_block-block_1');
     $this->drupalGet('test-page');
@@ -357,13 +357,13 @@ public function testBlockContextualLinks() {
     $id = 'block:block=' . $block->id() . ':langcode=en|entity.view.edit_form:view=test_view_block:location=block&name=test_view_block&display_id=block_1&langcode=en';
     $cached_id = 'block:block=' . $cached_block->id() . ':langcode=en|entity.view.edit_form:view=test_view_block:location=block&name=test_view_block&display_id=block_1&langcode=en';
     // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:assertContextualLinkPlaceHolder()
-    $this->assertRaw('<div' . new Attribute(array('data-contextual-id' => $id)) . '></div>', format_string('Contextual link placeholder with id @id exists.', array('@id' => $id)));
-    $this->assertRaw('<div' . new Attribute(array('data-contextual-id' => $cached_id)) . '></div>', format_string('Contextual link placeholder with id @id exists.', array('@id' => $cached_id)));
+    $this->assertRaw('<div' . new Attribute(['data-contextual-id' => $id]) . '></div>', format_string('Contextual link placeholder with id @id exists.', ['@id' => $id]));
+    $this->assertRaw('<div' . new Attribute(['data-contextual-id' => $cached_id]) . '></div>', format_string('Contextual link placeholder with id @id exists.', ['@id' => $cached_id]));
 
     // Get server-rendered contextual links.
     // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:renderContextualLinks()
-    $post = array('ids[0]' => $id, 'ids[1]' => $cached_id);
-    $response = $this->drupalPostWithFormat('contextual/render', 'json', $post, array('query' => array('destination' => 'test-page')));
+    $post = ['ids[0]' => $id, 'ids[1]' => $cached_id];
+    $response = $this->drupalPostWithFormat('contextual/render', 'json', $post, ['query' => ['destination' => 'test-page']]);
     $this->assertResponse(200);
     $json = Json::decode($response);
     $this->assertIdentical($json[$id], '<ul class="contextual-links"><li class="block-configure"><a href="' . base_path() . 'admin/structure/block/manage/' . $block->id() . '">Configure block</a></li><li class="entityviewedit-form"><a href="' . base_path() . 'admin/structure/views/view/test_view_block/edit/block_1">Edit view</a></li></ul>');
diff --git a/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestBlockInstantiation.php b/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestBlockInstantiation.php
index e5ad8daecc3a08bf771d21e3c62876be5ec820d8..0d146390c518573757ec71bb3f1f0dfaa030e607 100644
--- a/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestBlockInstantiation.php
+++ b/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestBlockInstantiation.php
@@ -21,9 +21,9 @@ class TestBlockInstantiation extends BlockBase {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'display_message' => 'no message set',
-    );
+    ];
   }
 
   /**
@@ -37,11 +37,11 @@ protected function blockAccess(AccountInterface $account) {
    * {@inheritdoc}
    */
   public function blockForm($form, FormStateInterface $form_state) {
-    $form['display_message'] = array(
+    $form['display_message'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Display message'),
       '#default_value' => $this->configuration['display_message'],
-    );
+    ];
     return $form;
   }
 
@@ -56,9 +56,9 @@ public function blockSubmit($form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function build() {
-    return array(
+    return [
       '#children' => $this->configuration['display_message'],
-    );
+    ];
   }
 
 }
diff --git a/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestCacheBlock.php b/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestCacheBlock.php
index b395b9266ccb8d58234e335cfe59d31478e5cb91..5fec14ccc7719f1c0045651bb1717531bb5b5aa8 100644
--- a/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestCacheBlock.php
+++ b/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestCacheBlock.php
@@ -20,7 +20,7 @@ class TestCacheBlock extends BlockBase {
   public function build() {
     $content = \Drupal::state()->get('block_test.content');
 
-    $build = array();
+    $build = [];
     if (!empty($content)) {
       $build['#markup'] = $content;
     }
diff --git a/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestContextAwareBlock.php b/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestContextAwareBlock.php
index bc7f20b256ef75202a9a3bfeb87945be83fc912d..7db350da8133b541af2c1a42f99bf667f47a673f 100644
--- a/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestContextAwareBlock.php
+++ b/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestContextAwareBlock.php
@@ -25,11 +25,11 @@ class TestContextAwareBlock extends BlockBase {
   public function build() {
     /** @var $user \Drupal\user\UserInterface */
     $user = $this->getContextValue('user');
-    return array(
+    return [
       '#prefix' => '<div id="' . $this->getPluginId() . '--username">',
       '#suffix' => '</div>',
       '#markup' => $user ? $user->getUsername() : 'No context mapping selected.' ,
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestHtmlBlock.php b/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestHtmlBlock.php
index de90af461280dd9d74f97949285b748100e30fe0..35f08c4b041cd6a471d85fd864be67ac0206c82f 100644
--- a/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestHtmlBlock.php
+++ b/core/modules/block/tests/modules/block_test/src/Plugin/Block/TestHtmlBlock.php
@@ -18,10 +18,10 @@ class TestHtmlBlock extends BlockBase {
    * {@inheritdoc}
    */
   public function build() {
-    return array(
+    return [
       '#attributes' => \Drupal::state()->get('block_test.attributes'),
       '#children' => \Drupal::state()->get('block_test.content'),
-    );
+    ];
   }
 
 }
diff --git a/core/modules/block/tests/src/Functional/BlockCacheTest.php b/core/modules/block/tests/src/Functional/BlockCacheTest.php
index 9285c644f04b26355d04e538745524fee9017f89..4ea433f76a85f590fd9af0692b09a7ee09b1b552 100644
--- a/core/modules/block/tests/src/Functional/BlockCacheTest.php
+++ b/core/modules/block/tests/src/Functional/BlockCacheTest.php
@@ -17,7 +17,7 @@ class BlockCacheTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test', 'test_page_test');
+  public static $modules = ['block', 'block_test', 'test_page_test'];
 
   /**
    * A user with permission to create and edit books and to administer blocks.
@@ -51,7 +51,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create an admin user, log in and enable test blocks.
-    $this->adminUser = $this->drupalCreateUser(array('administer blocks', 'access administration pages'));
+    $this->adminUser = $this->drupalCreateUser(['administer blocks', 'access administration pages']);
     $this->drupalLogin($this->adminUser);
 
     // Create additional users to test caching modes.
@@ -87,7 +87,7 @@ function testCachePerRole() {
     $this->assertText($old_content, 'Block is served from the cache.');
 
     // Clear the cache and verify that the stale data is no longer there.
-    Cache::invalidateTags(array('block_view'));
+    Cache::invalidateTags(['block_view']);
     $this->drupalGet('');
     $this->assertNoText($old_content, 'Block cache clear removes stale cache data.');
     $this->assertText($current_content, 'Fresh block content is displayed after clearing the cache.');
diff --git a/core/modules/block/tests/src/Functional/BlockHiddenRegionTest.php b/core/modules/block/tests/src/Functional/BlockHiddenRegionTest.php
index e2965dcdcb702d27b00df99133a4b4bde71769fa..c51551521ab905acd0b698f37fb4ea50f5000848 100644
--- a/core/modules/block/tests/src/Functional/BlockHiddenRegionTest.php
+++ b/core/modules/block/tests/src/Functional/BlockHiddenRegionTest.php
@@ -22,17 +22,17 @@ class BlockHiddenRegionTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test', 'search');
+  public static $modules = ['block', 'block_test', 'search'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create administrative user.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer blocks',
       'administer themes',
       'search content',
-      )
+      ]
     );
 
     $this->drupalLogin($this->adminUser);
@@ -53,7 +53,7 @@ public function testBlockNotInHiddenRegion() {
     $theme = 'block_test_theme';
     // We need to install a non-hidden theme so that there is more than one
     // local task.
-    \Drupal::service('theme_handler')->install(array($theme, 'stark'));
+    \Drupal::service('theme_handler')->install([$theme, 'stark']);
     $this->config('system.theme')
       ->set('default', $theme)
       ->save();
diff --git a/core/modules/block/tests/src/Functional/BlockHookOperationTest.php b/core/modules/block/tests/src/Functional/BlockHookOperationTest.php
index 9cb2272ce7d3b16413be509cce57ff53f50964e9..3a5c1ffbd5c4f04c5a2259cbf71ad25d44b09f9c 100644
--- a/core/modules/block/tests/src/Functional/BlockHookOperationTest.php
+++ b/core/modules/block/tests/src/Functional/BlockHookOperationTest.php
@@ -17,14 +17,14 @@ class BlockHookOperationTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'entity_test');
+  public static $modules = ['block', 'entity_test'];
 
   protected function setUp() {
     parent::setUp();
 
-    $permissions = array(
+    $permissions = [
       'administer blocks',
-    );
+    ];
 
     // Create and log in user.
     $admin_user = $this->drupalCreateUser($permissions);
@@ -38,7 +38,7 @@ public function testBlockOperationAlter() {
     // Add a test block, any block will do.
     // Set the machine name so the test_operation link can be built later.
     $block_id = Unicode::strtolower($this->randomMachineName(16));
-    $this->drupalPlaceBlock('system_powered_by_block', array('id' => $block_id));
+    $this->drupalPlaceBlock('system_powered_by_block', ['id' => $block_id]);
 
     // Get the Block listing.
     $this->drupalGet('admin/structure/block');
diff --git a/core/modules/block/tests/src/Functional/BlockHtmlTest.php b/core/modules/block/tests/src/Functional/BlockHtmlTest.php
index 89bbcf9ee7c6a41b161de9c64a380ce35b87dc0c..943699079630cda06a0e811e680d74857972879e 100644
--- a/core/modules/block/tests/src/Functional/BlockHtmlTest.php
+++ b/core/modules/block/tests/src/Functional/BlockHtmlTest.php
@@ -16,7 +16,7 @@ class BlockHtmlTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test');
+  public static $modules = ['block', 'block_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -24,9 +24,9 @@ protected function setUp() {
     $this->drupalLogin($this->rootUser);
 
     // Enable the test_html block, to test HTML ID and attributes.
-    \Drupal::state()->set('block_test.attributes', array('data-custom-attribute' => 'foo'));
+    \Drupal::state()->set('block_test.attributes', ['data-custom-attribute' => 'foo']);
     \Drupal::state()->set('block_test.content', $this->randomMachineName());
-    $this->drupalPlaceBlock('test_html', array('id' => 'test_html_block'));
+    $this->drupalPlaceBlock('test_html', ['id' => 'test_html_block']);
 
     // Enable a menu block, to test more complicated HTML.
     $this->drupalPlaceBlock('system_menu_block:admin');
@@ -43,7 +43,7 @@ function testHtml() {
     $this->assertFieldByXPath('//div[@id="block-test-html-block" and @data-custom-attribute="foo"]', NULL, 'HTML ID and attributes for test block are valid and on the same DOM element.');
 
     // Ensure expected markup for a menu block.
-    $elements = $this->xpath('//nav[contains(@class, :nav-class)]/ul[contains(@class, :ul-class)]/li', array(':nav-class' => 'block-menu', ':ul-class' => 'menu'));
+    $elements = $this->xpath('//nav[contains(@class, :nav-class)]/ul[contains(@class, :ul-class)]/li', [':nav-class' => 'block-menu', ':ul-class' => 'menu']);
     $this->assertTrue(!empty($elements), 'The proper block markup was found.');
   }
 
diff --git a/core/modules/block/tests/src/Functional/BlockInvalidRegionTest.php b/core/modules/block/tests/src/Functional/BlockInvalidRegionTest.php
index b0e08b9e37f42e94c3fbd94830166b933700e061..9b18633d67527f9be2a6f782585a81a6befb70ff 100644
--- a/core/modules/block/tests/src/Functional/BlockInvalidRegionTest.php
+++ b/core/modules/block/tests/src/Functional/BlockInvalidRegionTest.php
@@ -18,16 +18,16 @@ class BlockInvalidRegionTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test');
+  public static $modules = ['block', 'block_test'];
 
   protected function setUp() {
     parent::setUp();
     // Create an admin user.
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'administer site configuration',
       'access administration pages',
       'administer blocks',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
   }
 
@@ -40,14 +40,14 @@ function testBlockInInvalidRegion() {
     \Drupal::configFactory()->getEditable('block.block.' . $block->id())->set('region', 'invalid_region')->save();
     $block = Block::load($block->id());
 
-    $warning_message = t('The block %info was assigned to the invalid region %region and has been disabled.', array('%info' => $block->id(), '%region' => 'invalid_region'));
+    $warning_message = t('The block %info was assigned to the invalid region %region and has been disabled.', ['%info' => $block->id(), '%region' => 'invalid_region']);
 
     // Clearing the cache should disable the test block placed in the invalid region.
-    $this->drupalPostForm('admin/config/development/performance', array(), 'Clear all caches');
+    $this->drupalPostForm('admin/config/development/performance', [], 'Clear all caches');
     $this->assertRaw($warning_message, 'Enabled block was in the invalid region and has been disabled.');
 
     // Clear the cache to check if the warning message is not triggered.
-    $this->drupalPostForm('admin/config/development/performance', array(), 'Clear all caches');
+    $this->drupalPostForm('admin/config/development/performance', [], 'Clear all caches');
     $this->assertNoRaw($warning_message, 'Disabled block in the invalid region will not trigger the warning.');
 
     // Place disabled test block in the invalid region of the default theme.
@@ -55,7 +55,7 @@ function testBlockInInvalidRegion() {
     $block = Block::load($block->id());
 
     // Clear the cache to check if the warning message is not triggered.
-    $this->drupalPostForm('admin/config/development/performance', array(), 'Clear all caches');
+    $this->drupalPostForm('admin/config/development/performance', [], 'Clear all caches');
     $this->assertNoRaw($warning_message, 'Disabled block in the invalid region will not trigger the warning.');
   }
 
diff --git a/core/modules/block/tests/src/Functional/BlockLanguageTest.php b/core/modules/block/tests/src/Functional/BlockLanguageTest.php
index 7e0a0e1851b5626e85fa3cdd1dfa63df03a992ab..cf1b87720a2472c0825e09b8792b8659a034a9ce 100644
--- a/core/modules/block/tests/src/Functional/BlockLanguageTest.php
+++ b/core/modules/block/tests/src/Functional/BlockLanguageTest.php
@@ -23,19 +23,19 @@ class BlockLanguageTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'block', 'content_translation');
+  public static $modules = ['language', 'block', 'content_translation'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create a new user, allow him to manage the blocks and the languages.
-    $this->adminUser = $this->drupalCreateUser(array('administer blocks', 'administer languages'));
+    $this->adminUser = $this->drupalCreateUser(['administer blocks', 'administer languages']);
     $this->drupalLogin($this->adminUser);
 
     // Add predefined language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
     $this->assertText('French', 'Language added successfully.');
   }
@@ -52,17 +52,17 @@ public function testLanguageBlockVisibility() {
     $this->assertNoField('visibility[language][context_mapping][language]', 'Language type field is not visible.');
 
     // Enable a standard block and set the visibility setting for one language.
-    $edit = array(
+    $edit = [
       'visibility[language][langcodes][en]' => TRUE,
       'id' => strtolower($this->randomMachineName(8)),
       'region' => 'sidebar_first',
-    );
+    ];
     $this->drupalPostForm('admin/structure/block/add/system_powered_by_block' . '/' . $default_theme, $edit, t('Save block'));
 
     // Change the default language.
-    $edit = array(
+    $edit = [
       'site_default_language' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language', $edit, t('Save configuration'));
 
     // Check that a page has a block.
@@ -79,16 +79,16 @@ public function testLanguageBlockVisibility() {
    */
   public function testLanguageBlockVisibilityLanguageDelete() {
     // Enable a standard block and set the visibility setting for one language.
-    $edit = array(
-      'visibility' => array(
-        'language' => array(
-          'langcodes' => array(
+    $edit = [
+      'visibility' => [
+        'language' => [
+          'langcodes' => [
             'fr' => 'fr',
-          ),
+          ],
           'context_mapping' => ['language' => '@language.current_language_context:language_interface'],
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     $block = $this->drupalPlaceBlock('system_powered_by_block', $edit);
 
     // Check that we have the language in config after saving the setting.
@@ -96,7 +96,7 @@ public function testLanguageBlockVisibilityLanguageDelete() {
     $this->assertEqual('fr', $visibility['language']['langcodes']['fr'], 'Language is set in the block configuration.');
 
     // Delete the language.
-    $this->drupalPostForm('admin/config/regional/language/delete/fr', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/language/delete/fr', [], t('Delete'));
 
     // Check that the language is no longer stored in the configuration after
     // it is deleted.
diff --git a/core/modules/block/tests/src/Functional/BlockTemplateSuggestionsTest.php b/core/modules/block/tests/src/Functional/BlockTemplateSuggestionsTest.php
index ca13c58b7dc681d96b603f07f830cbda92a42544..61a37454200ec35cec5eaa7eb7d00e03879944f1 100644
--- a/core/modules/block/tests/src/Functional/BlockTemplateSuggestionsTest.php
+++ b/core/modules/block/tests/src/Functional/BlockTemplateSuggestionsTest.php
@@ -17,7 +17,7 @@ class BlockTemplateSuggestionsTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block');
+  public static $modules = ['block'];
 
   /**
    * Tests template suggestions from block_theme_suggestions_block().
@@ -27,22 +27,22 @@ function testBlockThemeHookSuggestions() {
     // an underscore (not transformed) and a hyphen (transformed to underscore),
     // and generates possibilities for each level of derivative.
     // @todo Clarify this comment.
-    $block = Block::create(array(
+    $block = Block::create([
       'plugin' => 'system_menu_block:admin',
       'region' => 'footer',
       'id' => 'machinename',
-    ));
+    ]);
 
-    $variables = array();
+    $variables = [];
     $plugin = $block->getPlugin();
     $variables['elements']['#configuration'] = $plugin->getConfiguration();
     $variables['elements']['#plugin_id'] = $plugin->getPluginId();
     $variables['elements']['#id'] = $block->id();
     $variables['elements']['#base_plugin_id'] = $plugin->getBaseId();
     $variables['elements']['#derivative_plugin_id'] = $plugin->getDerivativeId();
-    $variables['elements']['content'] = array();
+    $variables['elements']['content'] = [];
     $suggestions = block_theme_suggestions_block($variables);
-    $this->assertEqual($suggestions, array('block__system', 'block__system_menu_block', 'block__system_menu_block__admin', 'block__machinename'));
+    $this->assertEqual($suggestions, ['block__system', 'block__system_menu_block', 'block__system_menu_block__admin', 'block__machinename']);
   }
 
 }
diff --git a/core/modules/block/tests/src/Functional/NewDefaultThemeBlocksTest.php b/core/modules/block/tests/src/Functional/NewDefaultThemeBlocksTest.php
index 5c23a660420c65ae9f7d4bf7388ddbb04599ff05..767a7da590051ee815a2a08aa0fbe6b3086b2652 100644
--- a/core/modules/block/tests/src/Functional/NewDefaultThemeBlocksTest.php
+++ b/core/modules/block/tests/src/Functional/NewDefaultThemeBlocksTest.php
@@ -16,7 +16,7 @@ class NewDefaultThemeBlocksTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block');
+  public static $modules = ['block'];
 
   /**
    * Check the enabled Bartik blocks are correctly copied over.
@@ -25,22 +25,22 @@ function testNewDefaultThemeBlocks() {
     $default_theme = $this->config('system.theme')->get('default');
 
     // Add two instances of the user login block.
-    $this->drupalPlaceBlock('user_login_block', array(
+    $this->drupalPlaceBlock('user_login_block', [
       'id' => $default_theme . '_' . strtolower($this->randomMachineName(8)),
-    ));
-    $this->drupalPlaceBlock('user_login_block', array(
+    ]);
+    $this->drupalPlaceBlock('user_login_block', [
       'id' => $default_theme . '_' . strtolower($this->randomMachineName(8)),
-    ));
+    ]);
 
     // Add an instance of a different block.
-    $this->drupalPlaceBlock('system_powered_by_block', array(
+    $this->drupalPlaceBlock('system_powered_by_block', [
       'id' => $default_theme . '_' . strtolower($this->randomMachineName(8)),
-    ));
+    ]);
 
     // Install a different theme.
     $new_theme = 'bartik';
     $this->assertFalse($new_theme == $default_theme, 'The new theme is different from the previous default theme.');
-    \Drupal::service('theme_handler')->install(array($new_theme));
+    \Drupal::service('theme_handler')->install([$new_theme]);
     $this->config('system.theme')
       ->set('default', $new_theme)
       ->save();
diff --git a/core/modules/block/tests/src/Kernel/BlockConfigSchemaTest.php b/core/modules/block/tests/src/Kernel/BlockConfigSchemaTest.php
index a401ea5136657a218bc4d6603b8009bf921cf229..2bf41e0f4c02c4665d88efdc0a2ab6483fcf2eaf 100644
--- a/core/modules/block/tests/src/Kernel/BlockConfigSchemaTest.php
+++ b/core/modules/block/tests/src/Kernel/BlockConfigSchemaTest.php
@@ -18,7 +18,7 @@ class BlockConfigSchemaTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array(
+  public static $modules = [
     'block',
     'aggregator',
     'book',
@@ -32,7 +32,7 @@ class BlockConfigSchemaTest extends KernelTestBase {
     'taxonomy',
     'user',
     'text',
-  );
+  ];
 
   /**
    * The typed config manager.
@@ -59,7 +59,7 @@ protected function setUp() {
     $this->installEntitySchema('block_content');
     $this->installEntitySchema('taxonomy_term');
     $this->installEntitySchema('node');
-    $this->installSchema('book', array('book'));
+    $this->installSchema('book', ['book']);
   }
 
   /**
@@ -68,20 +68,20 @@ protected function setUp() {
   public function testBlockConfigSchema() {
     foreach ($this->blockManager->getDefinitions() as $block_id => $definition) {
       $id = strtolower($this->randomMachineName());
-      $block = Block::create(array(
+      $block = Block::create([
         'id' => $id,
         'theme' => 'classy',
         'weight' => 00,
         'status' => TRUE,
         'region' => 'content',
         'plugin' => $block_id,
-        'settings' => array(
+        'settings' => [
           'label' => $this->randomMachineName(),
           'provider' => 'system',
           'label_display' => FALSE,
-        ),
-        'visibility' => array(),
-      ));
+        ],
+        'visibility' => [],
+      ]);
       $block->save();
 
       $config = $this->config("block.block.$id");
diff --git a/core/modules/block/tests/src/Kernel/BlockInterfaceTest.php b/core/modules/block/tests/src/Kernel/BlockInterfaceTest.php
index 5959c0d6a856f3d497c979758ab2c4d36d955ba8..48d63a302d2e54c36d2eb6e98dc3711bc14284e8 100644
--- a/core/modules/block/tests/src/Kernel/BlockInterfaceTest.php
+++ b/core/modules/block/tests/src/Kernel/BlockInterfaceTest.php
@@ -13,7 +13,7 @@
  */
 class BlockInterfaceTest extends KernelTestBase {
 
-  public static $modules = array('system', 'block', 'block_test', 'user');
+  public static $modules = ['system', 'block', 'block_test', 'user'];
 
   /**
    * Test configuration and subsequent form() and build() method calls.
@@ -31,16 +31,16 @@ class BlockInterfaceTest extends KernelTestBase {
    */
   public function testBlockInterface() {
     $manager = $this->container->get('plugin.manager.block');
-    $configuration = array(
+    $configuration = [
       'label' => 'Custom Display Message',
-    );
-    $expected_configuration = array(
+    ];
+    $expected_configuration = [
       'id' => 'test_block_instantiation',
       'label' => 'Custom Display Message',
       'provider' => 'block_test',
       'label_display' => BlockPluginInterface::BLOCK_LABEL_VISIBLE,
       'display_message' => 'no message set',
-    );
+    ];
     // Initial configuration of the block at construction time.
     /** @var $display_block \Drupal\Core\Block\BlockPluginInterface */
     $display_block = $manager->createInstance('test_block_instantiation', $configuration);
@@ -52,46 +52,46 @@ public function testBlockInterface() {
     $this->assertIdentical($display_block->getConfiguration(), $expected_configuration, 'The block configuration was updated correctly.');
     $definition = $display_block->getPluginDefinition();
 
-    $expected_form = array(
-      'provider' => array(
+    $expected_form = [
+      'provider' => [
         '#type' => 'value',
         '#value' => 'block_test',
-      ),
-      'admin_label' => array(
+      ],
+      'admin_label' => [
         '#type' => 'item',
         '#title' => t('Block description'),
         '#plain_text' => $definition['admin_label'],
-      ),
-      'label' => array(
+      ],
+      'label' => [
         '#type' => 'textfield',
         '#title' => 'Title',
         '#maxlength' => 255,
         '#default_value' => 'Custom Display Message',
         '#required' => TRUE,
-      ),
-      'label_display' => array(
+      ],
+      'label_display' => [
         '#type' => 'checkbox',
         '#title' => 'Display title',
         '#default_value' => TRUE,
         '#return_value' => 'visible',
-      ),
-      'context_mapping' => array(),
-      'display_message' => array(
+      ],
+      'context_mapping' => [],
+      'display_message' => [
         '#type' => 'textfield',
         '#title' => t('Display message'),
         '#default_value' => 'My custom display message.',
-      ),
-    );
+      ],
+    ];
     $form_state = new FormState();
     // Ensure there are no form elements that do not belong to the plugin.
-    $actual_form = $display_block->buildConfigurationForm(array(), $form_state);
+    $actual_form = $display_block->buildConfigurationForm([], $form_state);
     // Remove the visibility sections, as that just tests condition plugins.
     unset($actual_form['visibility'], $actual_form['visibility_tabs']);
     $this->assertIdentical($this->castSafeStrings($actual_form), $this->castSafeStrings($expected_form), 'Only the expected form elements were present.');
 
-    $expected_build = array(
+    $expected_build = [
       '#children' => 'My custom display message.',
-    );
+    ];
     // Ensure the build array is proper.
     $this->assertIdentical($display_block->build(), $expected_build, 'The plugin returned the appropriate build array.');
 
diff --git a/core/modules/block/tests/src/Kernel/BlockStorageUnitTest.php b/core/modules/block/tests/src/Kernel/BlockStorageUnitTest.php
index d31c92c950ec63992cfd8dae92756ebb7a8f3019..2a7c7710c3093fa947e35760af1f730757fc4355 100644
--- a/core/modules/block/tests/src/Kernel/BlockStorageUnitTest.php
+++ b/core/modules/block/tests/src/Kernel/BlockStorageUnitTest.php
@@ -21,7 +21,7 @@ class BlockStorageUnitTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test', 'system');
+  public static $modules = ['block', 'block_test', 'system'];
 
   /**
    * The block storage.
@@ -56,7 +56,7 @@ public function testBlockCRUD() {
   protected function createTests() {
     // Attempt to create a block without a plugin.
     try {
-      $entity = $this->controller->create(array());
+      $entity = $this->controller->create([]);
       $entity->getPlugin();
       $this->fail('A block without a plugin was created with no exception thrown.');
     }
@@ -65,12 +65,12 @@ protected function createTests() {
     }
 
     // Create a block with only required values.
-    $entity = $this->controller->create(array(
+    $entity = $this->controller->create([
       'id' => 'test_block',
       'theme' => 'stark',
       'region' => 'content',
       'plugin' => 'test_html',
-    ));
+    ]);
     $entity->save();
 
     $this->assertTrue($entity instanceof Block, 'The newly created entity is a Block.');
@@ -81,24 +81,24 @@ protected function createTests() {
     unset($actual_properties['uuid']);
 
     // Ensure that default values are filled in.
-    $expected_properties = array(
+    $expected_properties = [
       'langcode' => \Drupal::languageManager()->getDefaultLanguage()->getId(),
       'status' => TRUE,
-      'dependencies' => array('module' => array('block_test'), 'theme' => array('stark')),
+      'dependencies' => ['module' => ['block_test'], 'theme' => ['stark']],
       'id' => 'test_block',
       'theme' => 'stark',
       'region' => 'content',
       'weight' => NULL,
       'provider' => NULL,
       'plugin' => 'test_html',
-      'settings' => array(
+      'settings' => [
         'id' => 'test_html',
         'label' => '',
         'provider' => 'block_test',
         'label_display' => BlockPluginInterface::BLOCK_LABEL_VISIBLE,
-      ),
-      'visibility' => array(),
-    );
+      ],
+      'visibility' => [],
+    ];
 
     $this->assertIdentical($actual_properties, $expected_properties);
 
@@ -148,7 +148,7 @@ public function testDefaultBlocks() {
     $this->assertTrue(empty($entities), 'There are no blocks initially.');
 
     // Install the block_test.module, so that its default config is installed.
-    $this->installConfig(array('block_test'));
+    $this->installConfig(['block_test']);
 
     $entities = $this->controller->loadMultiple();
     $entity = reset($entities);
diff --git a/core/modules/block/tests/src/Kernel/BlockViewBuilderTest.php b/core/modules/block/tests/src/Kernel/BlockViewBuilderTest.php
index 64b21096c0af578fddd8e12cf918b2da3c01d5e6..71c4f55b8d089b51defe53222244b3fa011e2c75 100644
--- a/core/modules/block/tests/src/Kernel/BlockViewBuilderTest.php
+++ b/core/modules/block/tests/src/Kernel/BlockViewBuilderTest.php
@@ -20,7 +20,7 @@ class BlockViewBuilderTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test', 'system', 'user');
+  public static $modules = ['block', 'block_test', 'system', 'user'];
 
   /**
    * The block being tested.
@@ -56,11 +56,11 @@ protected function setUp() {
     \Drupal::state()->set('block_test.content', 'Llamas &gt; unicorns!');
 
     // Create a block with only required values.
-    $this->block = $this->controller->create(array(
+    $this->block = $this->controller->create([
       'id' => 'test_block',
       'theme' => 'stark',
       'plugin' => 'test_cache',
-    ));
+    ]);
     $this->block->save();
 
     $this->container->get('cache.render')->deleteAll();
@@ -74,17 +74,17 @@ protected function setUp() {
   public function testBasicRendering() {
     \Drupal::state()->set('block_test.content', '');
 
-    $entity = $this->controller->create(array(
+    $entity = $this->controller->create([
       'id' => 'test_block1',
       'theme' => 'stark',
       'plugin' => 'test_html',
-    ));
+    ]);
     $entity->save();
 
     // Test the rendering of a block.
     $entity = Block::load('test_block1');
     $output = entity_view($entity, 'block');
-    $expected = array();
+    $expected = [];
     $expected[] = '<div id="block-test-block1">';
     $expected[] = '  ';
     $expected[] = '    ';
@@ -98,17 +98,17 @@ public function testBasicRendering() {
     Html::resetSeenIds();
 
     // Test the rendering of a block with a given title.
-    $entity = $this->controller->create(array(
+    $entity = $this->controller->create([
       'id' => 'test_block2',
       'theme' => 'stark',
       'plugin' => 'test_html',
-      'settings' => array(
+      'settings' => [
         'label' => 'Powered by Bananas',
-      ),
-    ));
+      ],
+    ]);
     $entity->save();
     $output = entity_view($entity, 'block');
-    $expected = array();
+    $expected = [];
     $expected[] = '<div id="block-test-block2">';
     $expected[] = '  ';
     $expected[] = '      <h2>Powered by Bananas</h2>';
@@ -128,11 +128,11 @@ public function testBlockViewBuilderCache() {
     $this->verifyRenderCacheHandling();
 
     // Create an empty block.
-    $this->block = $this->controller->create(array(
+    $this->block = $this->controller->create([
       'id' => 'test_block',
       'theme' => 'stark',
       'plugin' => 'test_cache',
-    ));
+    ]);
     $this->block->save();
     \Drupal::state()->set('block_test.content', NULL);
 
diff --git a/core/modules/block/tests/src/Unit/BlockConfigEntityUnitTest.php b/core/modules/block/tests/src/Unit/BlockConfigEntityUnitTest.php
index 453cdcc8210105697c89620cd020e8a70b00cdcc..8df0e93a2744340d543c15a8ee91789e01e74cde 100644
--- a/core/modules/block/tests/src/Unit/BlockConfigEntityUnitTest.php
+++ b/core/modules/block/tests/src/Unit/BlockConfigEntityUnitTest.php
@@ -69,20 +69,20 @@ protected function setUp() {
    * @covers ::calculateDependencies
    */
   public function testCalculateDependencies() {
-    $values = array('theme' => 'stark');
+    $values = ['theme' => 'stark'];
     // Mock the entity under test so that we can mock getPluginCollections().
     $entity = $this->getMockBuilder('\Drupal\block\Entity\Block')
-      ->setConstructorArgs(array($values, $this->entityTypeId))
-      ->setMethods(array('getPluginCollections'))
+      ->setConstructorArgs([$values, $this->entityTypeId])
+      ->setMethods(['getPluginCollections'])
       ->getMock();
     // Create a configurable plugin that would add a dependency.
     $instance_id = $this->randomMachineName();
-    $instance = new TestConfigurablePlugin(array(), $instance_id, array('provider' => 'test'));
+    $instance = new TestConfigurablePlugin([], $instance_id, ['provider' => 'test']);
 
     // Create a plugin collection to contain the instance.
     $plugin_collection = $this->getMockBuilder('\Drupal\Core\Plugin\DefaultLazyPluginCollection')
       ->disableOriginalConstructor()
-      ->setMethods(array('get'))
+      ->setMethods(['get'])
       ->getMock();
     $plugin_collection->expects($this->atLeastOnce())
       ->method('get')
@@ -93,7 +93,7 @@ public function testCalculateDependencies() {
     // Return the mocked plugin collection.
     $entity->expects($this->once())
       ->method('getPluginCollections')
-      ->will($this->returnValue(array($plugin_collection)));
+      ->will($this->returnValue([$plugin_collection]));
 
     $dependencies = $entity->calculateDependencies()->getDependencies();
     $this->assertContains('test', $dependencies['module']);
diff --git a/core/modules/block/tests/src/Unit/BlockFormTest.php b/core/modules/block/tests/src/Unit/BlockFormTest.php
index d8efe2b79109dd2a19d69c6969889a66a19a939c..b8463490bd3637996aac485094986640e6a3ac53 100644
--- a/core/modules/block/tests/src/Unit/BlockFormTest.php
+++ b/core/modules/block/tests/src/Unit/BlockFormTest.php
@@ -88,7 +88,7 @@ protected function setUp() {
    * @see \Drupal\block\BlockForm::getUniqueMachineName()
    */
   public function testGetUniqueMachineName() {
-    $blocks = array();
+    $blocks = [];
 
     $blocks['test'] = $this->getBlockMockWithMachineName('test');
     $blocks['other_test'] = $this->getBlockMockWithMachineName('other_test');
@@ -102,7 +102,7 @@ public function testGetUniqueMachineName() {
 
     $query->expects($this->exactly(5))
       ->method('execute')
-      ->will($this->returnValue(array('test', 'other_test', 'other_test_1', 'other_test_2')));
+      ->will($this->returnValue(['test', 'other_test', 'other_test_1', 'other_test_2']));
 
     $this->storage->expects($this->exactly(5))
       ->method('getQuery')
diff --git a/core/modules/block/tests/src/Unit/BlockRepositoryTest.php b/core/modules/block/tests/src/Unit/BlockRepositoryTest.php
index aab11fe9fc2c4114b3b4da54e487e782da526b1d..5584b0bfdda8aa4cbd82d205eb6ce059e87bb1e7 100644
--- a/core/modules/block/tests/src/Unit/BlockRepositoryTest.php
+++ b/core/modules/block/tests/src/Unit/BlockRepositoryTest.php
@@ -116,25 +116,25 @@ public function testGetVisibleBlocksPerRegion(array $blocks_config, array $expec
   }
 
   public function providerBlocksConfig() {
-    $blocks_config = array(
-      'block1' => array(
+    $blocks_config = [
+      'block1' => [
         AccessResult::allowed(), 'top', 0
-      ),
+      ],
       // Test a block without access.
-      'block2' => array(
+      'block2' => [
         AccessResult::forbidden(), 'bottom', 0
-      ),
+      ],
       // Test some blocks in the same region with specific weight.
-      'block4' => array(
+      'block4' => [
         AccessResult::allowed(), 'bottom', 5
-      ),
-      'block3' => array(
+      ],
+      'block3' => [
         AccessResult::allowed(), 'bottom', 5
-      ),
-      'block5' => array(
+      ],
+      'block5' => [
         AccessResult::allowed(), 'bottom', -5
-      ),
-    );
+      ],
+    ];
 
     $test_cases = [];
     $test_cases[] = [$blocks_config,
diff --git a/core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php b/core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php
index c47d65ab445c303e6f388162c04d5440e078e84a..d91ebbcdbc29e6200d64597e989eeb7fabca12f1 100644
--- a/core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php
+++ b/core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php
@@ -24,7 +24,7 @@ protected function setUp() {
     $block_manager = $this->getMock('Drupal\Core\Block\BlockManagerInterface');
     $block_manager->expects($this->any())
       ->method('getCategories')
-      ->will($this->returnValue(array('Comment', 'Node', 'None & Such', 'User')));
+      ->will($this->returnValue(['Comment', 'Node', 'None & Such', 'User']));
 
     $this->autocompleteController = new CategoryAutocompleteController($block_manager);
   }
@@ -43,9 +43,9 @@ protected function setUp() {
    */
   public function testAutocompleteSuggestions($string, $suggestions) {
     $suggestions = array_map(function ($suggestion) {
-      return array('value' => $suggestion, 'label' => Html::escape($suggestion));
+      return ['value' => $suggestion, 'label' => Html::escape($suggestion)];
     }, $suggestions);
-    $result = $this->autocompleteController->autocomplete(new Request(array('q' => $string)));
+    $result = $this->autocompleteController->autocomplete(new Request(['q' => $string]));
     $this->assertSame($suggestions, json_decode($result->getContent(), TRUE));
   }
 
@@ -55,30 +55,30 @@ public function testAutocompleteSuggestions($string, $suggestions) {
    * @return array
    */
   public function providerTestAutocompleteSuggestions() {
-    $test_parameters = array();
-    $test_parameters[] = array(
+    $test_parameters = [];
+    $test_parameters[] = [
       'string' => 'Com',
-      'suggestions' => array(
+      'suggestions' => [
         'Comment',
-      ),
-    );
-    $test_parameters[] = array(
+      ],
+    ];
+    $test_parameters[] = [
       'string' => 'No',
-      'suggestions' => array(
+      'suggestions' => [
         'Node',
         'None & Such',
-      ),
-    );
-    $test_parameters[] = array(
+      ],
+    ];
+    $test_parameters[] = [
       'string' => 'us',
-      'suggestions' => array(
+      'suggestions' => [
         'User',
-      ),
-    );
-    $test_parameters[] = array(
+      ],
+    ];
+    $test_parameters[] = [
       'string' => 'Banana',
-      'suggestions' => array(),
-    );
+      'suggestions' => [],
+    ];
     return $test_parameters;
   }
 
diff --git a/core/modules/block/tests/src/Unit/Menu/BlockLocalTasksTest.php b/core/modules/block/tests/src/Unit/Menu/BlockLocalTasksTest.php
index a513c4ef756e0f209fd549b4e6b1ad7151adb831..6d7dbf2b9b7d6d0bc32104cd2005f2d39e31791c 100644
--- a/core/modules/block/tests/src/Unit/Menu/BlockLocalTasksTest.php
+++ b/core/modules/block/tests/src/Unit/Menu/BlockLocalTasksTest.php
@@ -13,33 +13,33 @@
 class BlockLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array('block' => 'core/modules/block');
+    $this->directoryList = ['block' => 'core/modules/block'];
     parent::setUp();
 
-    $config_factory = $this->getConfigFactoryStub(array('system.theme' => array(
+    $config_factory = $this->getConfigFactoryStub(['system.theme' => [
       'default' => 'test_c',
-    )));
+    ]]);
 
-    $themes = array();
-    $themes['test_a'] = (object) array(
+    $themes = [];
+    $themes['test_a'] = (object) [
       'status' => 1,
-      'info' => array(
+      'info' => [
         'name' => 'test_a',
         'hidden' => TRUE,
-      ),
-    );
-    $themes['test_b'] = (object) array(
+      ],
+    ];
+    $themes['test_b'] = (object) [
       'status' => 1,
-      'info' => array(
+      'info' => [
         'name' => 'test_b',
-      ),
-    );
-    $themes['test_c'] = (object) array(
+      ],
+    ];
+    $themes['test_c'] = (object) [
       'status' => 1,
-      'info' => array(
+      'info' => [
         'name' => 'test_c',
-      ),
-    );
+      ],
+    ];
     $theme_handler = $this->getMock('Drupal\Core\Extension\ThemeHandlerInterface');
     $theme_handler->expects($this->any())
       ->method('listInfo')
@@ -63,7 +63,7 @@ protected function setUp() {
    * Tests the admin edit local task.
    */
   public function testBlockAdminLocalTasks() {
-    $this->assertLocalTasks('entity.block.edit_form', array(array('entity.block.edit_form')));
+    $this->assertLocalTasks('entity.block.edit_form', [['entity.block.edit_form']]);
   }
 
   /**
@@ -79,10 +79,10 @@ public function testBlockAdminDisplay($route, $expected) {
    * Provides a list of routes to test.
    */
   public function providerTestBlockAdminDisplay() {
-    return array(
-      array('block.admin_display', array(array('block.admin_display'), array('block.admin_display_theme:test_b', 'block.admin_display_theme:test_c'))),
-      array('block.admin_display_theme', array(array('block.admin_display'), array('block.admin_display_theme:test_b', 'block.admin_display_theme:test_c'))),
-    );
+    return [
+      ['block.admin_display', [['block.admin_display'], ['block.admin_display_theme:test_b', 'block.admin_display_theme:test_c']]],
+      ['block.admin_display_theme', [['block.admin_display'], ['block.admin_display_theme:test_b', 'block.admin_display_theme:test_c']]],
+    ];
   }
 
 }
diff --git a/core/modules/block/tests/src/Unit/Plugin/DisplayVariant/BlockPageVariantTest.php b/core/modules/block/tests/src/Unit/Plugin/DisplayVariant/BlockPageVariantTest.php
index 7701ecac0b54d980b3be04ca06f55a646284fd01..15694113534b8bcff0fd3c4c961740bf29b4b30e 100644
--- a/core/modules/block/tests/src/Unit/Plugin/DisplayVariant/BlockPageVariantTest.php
+++ b/core/modules/block/tests/src/Unit/Plugin/DisplayVariant/BlockPageVariantTest.php
@@ -44,7 +44,7 @@ class BlockPageVariantTest extends UnitTestCase {
    * @return \Drupal\block\Plugin\DisplayVariant\BlockPageVariant|\PHPUnit_Framework_MockObject_MockObject
    *   A mocked display variant plugin.
    */
-  public function setUpDisplayVariant($configuration = array(), $definition = array()) {
+  public function setUpDisplayVariant($configuration = [], $definition = []) {
 
     $container = new Container();
     $cache_context_manager = $this->getMockBuilder('Drupal\Core\Cache\CacheContextsManager')
@@ -60,37 +60,37 @@ public function setUpDisplayVariant($configuration = array(), $definition = arra
     $this->blockViewBuilder = $this->getMock('Drupal\Core\Entity\EntityViewBuilderInterface');
 
     return $this->getMockBuilder('Drupal\block\Plugin\DisplayVariant\BlockPageVariant')
-      ->setConstructorArgs(array($configuration, 'test', $definition, $this->blockRepository, $this->blockViewBuilder, ['config:block_list']))
-      ->setMethods(array('getRegionNames'))
+      ->setConstructorArgs([$configuration, 'test', $definition, $this->blockRepository, $this->blockViewBuilder, ['config:block_list']])
+      ->setMethods(['getRegionNames'])
       ->getMock();
   }
 
   public function providerBuild() {
-    $blocks_config = array(
-      'block1' => array(
+    $blocks_config = [
+      'block1' => [
         // region, is main content block, is messages block, is title block
         'top', FALSE, FALSE, FALSE,
-      ),
+      ],
       // Test multiple blocks in the same region.
-      'block2' => array(
+      'block2' => [
         'bottom', FALSE, FALSE, FALSE,
-      ),
-      'block3' => array(
+      ],
+      'block3' => [
         'bottom', FALSE, FALSE, FALSE,
-      ),
+      ],
       // Test a block implementing MainContentBlockPluginInterface.
-      'block4' => array(
+      'block4' => [
         'center', TRUE, FALSE, FALSE,
-      ),
+      ],
       // Test a block implementing MessagesBlockPluginInterface.
-      'block5' => array(
+      'block5' => [
         'center', FALSE, TRUE, FALSE,
-      ),
+      ],
       // Test a block implementing TitleBlockPluginInterface.
-      'block6' => array(
+      'block6' => [
         'center', FALSE, FALSE, TRUE,
-      ),
-    );
+      ],
+    ];
 
     $test_cases = [];
     $test_cases[] = [$blocks_config, 6,
@@ -219,7 +219,7 @@ public function testBuild(array $blocks_config, $visible_block_count, array $exp
     }
     $this->blockViewBuilder->expects($this->exactly($visible_block_count))
       ->method('view')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->blockRepository->expects($this->once())
       ->method('getVisibleBlocksPerRegion')
       ->willReturnCallback(function (&$cacheable_metadata) use ($blocks) {
diff --git a/core/modules/block_content/block_content.module b/core/modules/block_content/block_content.module
index e0b57295617730e9b164f442d7884d9724ec2432..1b32a522940029e2c4ab91d735abf93f5f3ac1af 100644
--- a/core/modules/block_content/block_content.module
+++ b/core/modules/block_content/block_content.module
@@ -15,25 +15,25 @@
 function block_content_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.block_content':
-      $field_ui = \Drupal::moduleHandler()->moduleExists('field_ui') ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#';
+      $field_ui = \Drupal::moduleHandler()->moduleExists('field_ui') ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#';
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Custom Block module allows you to create and manage custom <em>block types</em> and <em>content-containing blocks</em> from the <a href = ":block-library" >Custom block library<a/> page. Custom block types have fields; see the <a href=":field-help">Field module help</a> for more information. Once created, custom blocks can be placed in regions just like blocks provided by other modules; see the <a href=":blocks">Block module help</a> page for details. For more information, see the <a href=":online-help">online documentation for the Custom Block module</a>.', array(':block-library' => \Drupal::url('entity.block_content.collection'), ':block-content' => \Drupal::url('entity.block_content.collection'), ':field-help' => \Drupal::url('help.page', array('name' => 'field')), ':blocks' => \Drupal::url('help.page', array('name' => 'block')), ':online-help' => 'https://www.drupal.org/documentation/modules/block_content')) . '</p>';
+      $output .= '<p>' . t('The Custom Block module allows you to create and manage custom <em>block types</em> and <em>content-containing blocks</em> from the <a href = ":block-library" >Custom block library<a/> page. Custom block types have fields; see the <a href=":field-help">Field module help</a> for more information. Once created, custom blocks can be placed in regions just like blocks provided by other modules; see the <a href=":blocks">Block module help</a> page for details. For more information, see the <a href=":online-help">online documentation for the Custom Block module</a>.', [':block-library' => \Drupal::url('entity.block_content.collection'), ':block-content' => \Drupal::url('entity.block_content.collection'), ':field-help' => \Drupal::url('help.page', ['name' => 'field']), ':blocks' => \Drupal::url('help.page', ['name' => 'block']), ':online-help' => 'https://www.drupal.org/documentation/modules/block_content']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Creating and managing custom block types') . '</dt>';
-      $output .= '<dd>' . t('Users with the <em>Administer blocks</em> permission can create and edit custom block types with fields and display settings, from the <a href=":types">Block types</a> page in the Custom block library. For more information about managing fields and display settings, see the <a href=":field-ui">Field UI module help</a>.', array(':types' => \Drupal::url('entity.block_content_type.collection'), ':field-ui' => $field_ui)) . '</dd>';
+      $output .= '<dd>' . t('Users with the <em>Administer blocks</em> permission can create and edit custom block types with fields and display settings, from the <a href=":types">Block types</a> page in the Custom block library. For more information about managing fields and display settings, see the <a href=":field-ui">Field UI module help</a>.', [':types' => \Drupal::url('entity.block_content_type.collection'), ':field-ui' => $field_ui]) . '</dd>';
       $output .= '<dt>' . t('Creating custom blocks') . '</dt>';
-      $output .= '<dd>' . t('Users with the <em>Administer blocks</em> permission can create, edit, and delete custom blocks of each defined custom block type, from the <a href=":block-library">Blocks</a> page in the Custom block library. After creating a block, place it in a region from the <a href=":blocks">Block layout</a> page; see the <a href=":block_help">Block module help</a> for more information about placing blocks.', array(':blocks' => \Drupal::url('block.admin_display'), ':block-library' => \Drupal::url('entity.block_content.collection'), ':block_help' => \Drupal::url('help.page', array('name' => 'block')))) . '</dd>';
+      $output .= '<dd>' . t('Users with the <em>Administer blocks</em> permission can create, edit, and delete custom blocks of each defined custom block type, from the <a href=":block-library">Blocks</a> page in the Custom block library. After creating a block, place it in a region from the <a href=":blocks">Block layout</a> page; see the <a href=":block_help">Block module help</a> for more information about placing blocks.', [':blocks' => \Drupal::url('block.admin_display'), ':block-library' => \Drupal::url('entity.block_content.collection'), ':block_help' => \Drupal::url('help.page', ['name' => 'block'])]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
     case 'entity.block_content.collection':
-      $output = '<p>' . t('Blocks in the block library belong to <a href=":types">Custom block types</a>, each with its own fields and display settings. After creating a block, place it in a region from the <a href=":blocks">Block layout</a> page.', array(':types' => \Drupal::url('entity.block_content_type.collection'), ':blocks' => \Drupal::url('block.admin_display'))) . '</p>';
+      $output = '<p>' . t('Blocks in the block library belong to <a href=":types">Custom block types</a>, each with its own fields and display settings. After creating a block, place it in a region from the <a href=":blocks">Block layout</a> page.', [':types' => \Drupal::url('entity.block_content_type.collection'), ':blocks' => \Drupal::url('block.admin_display')]) . '</p>';
       return $output;
 
     case 'entity.block_content_type.collection':
-      $output = '<p>' . t('Each block type has its own fields and display settings. Create blocks of each type on the <a href=":block-library">Blocks</a> page in the custom block library.', array(':block-library' => \Drupal::url('entity.block_content.collection'))) . '</p>';
+      $output = '<p>' . t('Each block type has its own fields and display settings. Create blocks of each type on the <a href=":block-library">Blocks</a> page in the custom block library.', [':block-library' => \Drupal::url('entity.block_content.collection')]) . '</p>';
       return $output;
 
   }
@@ -43,12 +43,12 @@ function block_content_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function block_content_theme($existing, $type, $theme, $path) {
-  return array(
-    'block_content_add_list' => array(
-      'variables' => array('content' => NULL),
+  return [
+    'block_content_add_list' => [
+      'variables' => ['content' => NULL],
       'file' => 'block_content.pages.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -83,23 +83,23 @@ function block_content_add_body_field($block_type_id, $label = 'Body') {
       'field_storage' => FieldStorageConfig::loadByName('block_content', 'body'),
       'bundle' => $block_type_id,
       'label' => $label,
-      'settings' => array('display_summary' => FALSE),
+      'settings' => ['display_summary' => FALSE],
     ]);
     $field->save();
 
     // Assign widget settings for the 'default' form mode.
     entity_get_form_display('block_content', $block_type_id, 'default')
-      ->setComponent('body', array(
+      ->setComponent('body', [
         'type' => 'text_textarea_with_summary',
-      ))
+      ])
       ->save();
 
     // Assign display settings for 'default' view mode.
     entity_get_display('block_content', $block_type_id, 'default')
-      ->setComponent('body', array(
+      ->setComponent('body', [
         'label' => 'hidden',
         'type' => 'text_default',
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/block_content/block_content.pages.inc b/core/modules/block_content/block_content.pages.inc
index 86296900df659f993286654ba8ad5029c5492e94..e50e71787b317c6a111aa347a99780d8cb404406 100644
--- a/core/modules/block_content/block_content.pages.inc
+++ b/core/modules/block_content/block_content.pages.inc
@@ -19,18 +19,18 @@
  * @see block_content_add_page()
  */
 function template_preprocess_block_content_add_list(&$variables) {
-  $variables['types'] = array();
+  $variables['types'] = [];
   $query = \Drupal::request()->query->all();
   foreach ($variables['content'] as $type) {
-    $variables['types'][$type->id()] = array(
-      'link' => \Drupal::l($type->label(), new Url('block_content.add_form', array('block_content_type' => $type->id()), array('query' => $query))),
-      'description' => array(
+    $variables['types'][$type->id()] = [
+      'link' => \Drupal::l($type->label(), new Url('block_content.add_form', ['block_content_type' => $type->id()], ['query' => $query])),
+      'description' => [
         '#markup' => $type->getDescription(),
-      ),
+      ],
       'title' => $type->label(),
-      'localized_options' => array(
+      'localized_options' => [
         'query' => $query,
-      ),
-    );
+      ],
+    ];
   }
 }
diff --git a/core/modules/block_content/src/BlockContentForm.php b/core/modules/block_content/src/BlockContentForm.php
index b3f50f7a952b4002e0316a7ed3a7c1312024cbec..eefd4e9790847de64f8a84f35cd465ae435e7252 100644
--- a/core/modules/block_content/src/BlockContentForm.php
+++ b/core/modules/block_content/src/BlockContentForm.php
@@ -27,7 +27,7 @@ public function form(array $form, FormStateInterface $form_state) {
     $form = parent::form($form, $form_state);
 
     if ($this->operation == 'edit') {
-      $form['#title'] = $this->t('Edit custom block %label', array('%label' => $block->label()));
+      $form['#title'] = $this->t('Edit custom block %label', ['%label' => $block->label()]);
     }
     // Override the default CSS class name, since the user-defined custom block
     // type name in 'TYPE-block-form' potentially clashes with third-party class
@@ -45,10 +45,10 @@ public function save(array $form, FormStateInterface $form_state) {
 
     $insert = $block->isNew();
     $block->save();
-    $context = array('@type' => $block->bundle(), '%info' => $block->label());
+    $context = ['@type' => $block->bundle(), '%info' => $block->label()];
     $logger = $this->logger('block_content');
     $block_type = $this->getBundleEntity();
-    $t_args = array('@type' => $block_type->label(), '%info' => $block->label());
+    $t_args = ['@type' => $block_type->label(), '%info' => $block->label()];
 
     if ($insert) {
       $logger->notice('@type: added %info.', $context);
@@ -68,10 +68,10 @@ public function save(array $form, FormStateInterface $form_state) {
         }
         $form_state->setRedirect(
           'block.admin_add',
-          array(
+          [
             'plugin_id' => 'block_content:' . $block->uuid(),
             'theme' => $theme,
-          )
+          ]
         );
       }
       else {
diff --git a/core/modules/block_content/src/BlockContentTranslationHandler.php b/core/modules/block_content/src/BlockContentTranslationHandler.php
index b446cde8c5193c00236db8997cc5e76a57c4d3ff..612613b376b77509507fe156b881df080ea77366 100644
--- a/core/modules/block_content/src/BlockContentTranslationHandler.php
+++ b/core/modules/block_content/src/BlockContentTranslationHandler.php
@@ -16,7 +16,7 @@ class BlockContentTranslationHandler extends ContentTranslationHandler {
    */
   protected function entityFormTitle(EntityInterface $entity) {
     $block_type = BlockContentType::load($entity->bundle());
-    return t('<em>Edit @type</em> @title', array('@type' => $block_type->label(), '@title' => $entity->label()));
+    return t('<em>Edit @type</em> @title', ['@type' => $block_type->label(), '@title' => $entity->label()]);
   }
 
 }
diff --git a/core/modules/block_content/src/BlockContentTypeForm.php b/core/modules/block_content/src/BlockContentTypeForm.php
index d864e8d56f38551cdc98f9496f33789624018b6f..4e140b19322efceccfdde2417094a344958bdd1a 100644
--- a/core/modules/block_content/src/BlockContentTypeForm.php
+++ b/core/modules/block_content/src/BlockContentTypeForm.php
@@ -25,65 +25,65 @@ public function form(array $form, FormStateInterface $form_state) {
       $form['#title'] = $this->t('Add custom block type');
     }
     else {
-      $form['#title'] = $this->t('Edit %label custom block type', array('%label' => $block_type->label()));
+      $form['#title'] = $this->t('Edit %label custom block type', ['%label' => $block_type->label()]);
     }
 
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => t('Label'),
       '#maxlength' => 255,
       '#default_value' => $block_type->label(),
       '#description' => t("Provide a label for this block type to help identify it in the administration pages."),
       '#required' => TRUE,
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
       '#default_value' => $block_type->id(),
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => '\Drupal\block_content\Entity\BlockContentType::load',
-      ),
+      ],
       '#maxlength' => EntityTypeInterface::BUNDLE_MAX_LENGTH,
-    );
+    ];
 
-    $form['description'] = array(
+    $form['description'] = [
       '#type' => 'textarea',
       '#default_value' => $block_type->getDescription(),
       '#description' => t('Enter a description for this block type.'),
       '#title' => t('Description'),
-    );
+    ];
 
-    $form['revision'] = array(
+    $form['revision'] = [
       '#type' => 'checkbox',
       '#title' => t('Create new revision'),
       '#default_value' => $block_type->shouldCreateNewRevision(),
       '#description' => t('Create a new revision by default for this block type.'),
-    );
+    ];
 
     if ($this->moduleHandler->moduleExists('language')) {
-      $form['language'] = array(
+      $form['language'] = [
         '#type' => 'details',
         '#title' => t('Language settings'),
         '#group' => 'additional_settings',
-      );
+      ];
 
       $language_configuration = ContentLanguageSettings::loadByEntityTypeBundle('block_content', $block_type->id());
-      $form['language']['language_configuration'] = array(
+      $form['language']['language_configuration'] = [
         '#type' => 'language_configuration',
-        '#entity_information' => array(
+        '#entity_information' => [
           'entity_type' => 'block_content',
           'bundle' => $block_type->id(),
-        ),
+        ],
         '#default_value' => $language_configuration,
-      );
+      ];
 
       $form['#submit'][] = 'language_configuration_element_submit';
     }
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => t('Save'),
-    );
+    ];
 
     return $this->protectBundleIdElement($form);
   }
@@ -98,13 +98,13 @@ public function save(array $form, FormStateInterface $form_state) {
     $edit_link = $this->entity->link($this->t('Edit'));
     $logger = $this->logger('block_content');
     if ($status == SAVED_UPDATED) {
-      drupal_set_message(t('Custom block type %label has been updated.', array('%label' => $block_type->label())));
-      $logger->notice('Custom block type %label has been updated.', array('%label' => $block_type->label(), 'link' => $edit_link));
+      drupal_set_message(t('Custom block type %label has been updated.', ['%label' => $block_type->label()]));
+      $logger->notice('Custom block type %label has been updated.', ['%label' => $block_type->label(), 'link' => $edit_link]);
     }
     else {
       block_content_add_body_field($block_type->id());
-      drupal_set_message(t('Custom block type %label has been added.', array('%label' => $block_type->label())));
-      $logger->notice('Custom block type %label has been added.', array('%label' => $block_type->label(), 'link' => $edit_link));
+      drupal_set_message(t('Custom block type %label has been added.', ['%label' => $block_type->label()]));
+      $logger->notice('Custom block type %label has been added.', ['%label' => $block_type->label(), 'link' => $edit_link]);
     }
 
     $form_state->setRedirectUrl($this->entity->urlInfo('collection'));
diff --git a/core/modules/block_content/src/BlockContentViewBuilder.php b/core/modules/block_content/src/BlockContentViewBuilder.php
index 322a087d9fee0a6acda2222409b13668e4e79248..29c668cd63d09e4db3b630871d64d7f60b2578ea 100644
--- a/core/modules/block_content/src/BlockContentViewBuilder.php
+++ b/core/modules/block_content/src/BlockContentViewBuilder.php
@@ -15,13 +15,13 @@ class BlockContentViewBuilder extends EntityViewBuilder {
    * {@inheritdoc}
    */
   public function view(EntityInterface $entity, $view_mode = 'full', $langcode = NULL) {
-    return $this->viewMultiple(array($entity), $view_mode, $langcode)[0];
+    return $this->viewMultiple([$entity], $view_mode, $langcode)[0];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function viewMultiple(array $entities = array(), $view_mode = 'full', $langcode = NULL) {
+  public function viewMultiple(array $entities = [], $view_mode = 'full', $langcode = NULL) {
     $build_list = parent::viewMultiple($entities, $view_mode, $langcode);
     // Apply the buildMultiple() #pre_render callback immediately, to make
     // bubbling of attributes and contextual links to the actual block work.
@@ -48,10 +48,10 @@ protected function alterBuild(array &$build, EntityInterface $entity, EntityView
     parent::alterBuild($build, $entity, $display, $view_mode);
     // Add contextual links for this custom block.
     if (!$entity->isNew()) {
-      $build['#contextual_links']['block_content'] = array(
-        'route_parameters' => array('block_content' => $entity->id()),
-        'metadata' => array('changed' => $entity->getChangedTime()),
-      );
+      $build['#contextual_links']['block_content'] = [
+        'route_parameters' => ['block_content' => $entity->id()],
+        'metadata' => ['changed' => $entity->getChangedTime()],
+      ];
     }
   }
 
diff --git a/core/modules/block_content/src/BlockContentViewsData.php b/core/modules/block_content/src/BlockContentViewsData.php
index 1d5d46f5f038d582155fbdac55f4d207f8f90b12..010ede0ea59ad468488e991bc0511c5fd2136b38 100644
--- a/core/modules/block_content/src/BlockContentViewsData.php
+++ b/core/modules/block_content/src/BlockContentViewsData.php
@@ -23,13 +23,13 @@ public function getViewsData() {
 
     $data['block_content_field_data']['type']['field']['id'] = 'field';
 
-    $data['block_content']['block_content_listing_empty'] = array(
+    $data['block_content']['block_content_listing_empty'] = [
       'title' => $this->t('Empty block library behavior'),
       'help' => $this->t('Provides a link to add a new block.'),
-      'area' => array(
+      'area' => [
         'id' => 'block_content_listing_empty',
-      ),
-    );
+      ],
+    ];
     // Advertise this table as a possible base table.
     $data['block_content_field_revision']['table']['base']['help'] = $this->t('Block Content revision is a history of changes to block content.');
     $data['block_content_field_revision']['table']['base']['defaults']['title'] = 'info';
diff --git a/core/modules/block_content/src/Controller/BlockContentController.php b/core/modules/block_content/src/Controller/BlockContentController.php
index 1caad7415351a8af13c84b153f189d97575aac97..7c1f8aac3355a0b07e11ac8a2728760272210f91 100644
--- a/core/modules/block_content/src/Controller/BlockContentController.php
+++ b/core/modules/block_content/src/Controller/BlockContentController.php
@@ -79,14 +79,14 @@ public function add(Request $request) {
       return $this->addForm($type, $request);
     }
     if (count($types) === 0) {
-      return array(
+      return [
         '#markup' => $this->t('You have not created any block types yet. Go to the <a href=":url">block type creation page</a> to add a new block type.', [
           ':url' => Url::fromRoute('block_content.type_add')->toString(),
         ]),
-      );
+      ];
     }
 
-    return array('#theme' => 'block_content_add_list', '#content' => $types);
+    return ['#theme' => 'block_content_add_list', '#content' => $types];
   }
 
   /**
@@ -101,9 +101,9 @@ public function add(Request $request) {
    *   A form array as expected by drupal_render().
    */
   public function addForm(BlockContentTypeInterface $block_content_type, Request $request) {
-    $block = $this->blockContentStorage->create(array(
+    $block = $this->blockContentStorage->create([
       'type' => $block_content_type->id()
-    ));
+    ]);
     if (($theme = $request->query->get('theme')) && in_array($theme, array_keys($this->themeHandler->listInfo()))) {
       // We have navigated to this page from the block library and will keep track
       // of the theme for redirecting the user to the configuration page for the
@@ -123,7 +123,7 @@ public function addForm(BlockContentTypeInterface $block_content_type, Request $
    *   The page title.
    */
   public function getAddFormTitle(BlockContentTypeInterface $block_content_type) {
-    return $this->t('Add %type custom block', array('%type' => $block_content_type->label()));
+    return $this->t('Add %type custom block', ['%type' => $block_content_type->label()]);
   }
 
 }
diff --git a/core/modules/block_content/src/Entity/BlockContent.php b/core/modules/block_content/src/Entity/BlockContent.php
index 7c06ed869eea641c442c18195fa8a106fda6652f..11c0c5470d81da95d906cba334848f09a5c534f7 100644
--- a/core/modules/block_content/src/Entity/BlockContent.php
+++ b/core/modules/block_content/src/Entity/BlockContent.php
@@ -126,7 +126,7 @@ public static function postDelete(EntityStorageInterface $storage, array $entiti
    * {@inheritdoc}
    */
   public function getInstances() {
-    return \Drupal::entityTypeManager()->getStorage('block')->loadByProperties(array('plugin' => 'block_content:' . $this->uuid()));
+    return \Drupal::entityTypeManager()->getStorage('block')->loadByProperties(['plugin' => 'block_content:' . $this->uuid()]);
   }
 
   /**
@@ -178,10 +178,10 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setRevisionable(TRUE)
       ->setTranslatable(TRUE)
       ->setRequired(TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -5,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE)
       ->addConstraint('UniqueField', []);
 
@@ -189,13 +189,13 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('Revision log message'))
       ->setDescription(t('The log entry explaining the changes in this revision.'))
       ->setRevisionable(TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textarea',
         'weight' => 25,
-        'settings' => array(
+        'settings' => [
           'rows' => 4,
-        ),
-      ));
+        ],
+      ]);
 
     $fields['changed'] = BaseFieldDefinition::create('changed')
       ->setLabel(t('Changed'))
diff --git a/core/modules/block_content/src/Form/BlockContentDeleteForm.php b/core/modules/block_content/src/Form/BlockContentDeleteForm.php
index 3fe725daa8909aaf49abcf77b15259969428c424..035ec4c2fb506665efe4765904e569c74e259a8b 100644
--- a/core/modules/block_content/src/Form/BlockContentDeleteForm.php
+++ b/core/modules/block_content/src/Form/BlockContentDeleteForm.php
@@ -16,10 +16,10 @@ class BlockContentDeleteForm extends ContentEntityDeleteForm {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $instances = $this->entity->getInstances();
 
-    $form['message'] = array(
+    $form['message'] = [
       '#markup' => $this->formatPlural(count($instances), 'This will also remove 1 placed block instance.', 'This will also remove @count placed block instances.'),
       '#access' => !empty($instances),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/block_content/src/Form/BlockContentTypeDeleteForm.php b/core/modules/block_content/src/Form/BlockContentTypeDeleteForm.php
index b68e695b38abcb53c3e2a26a7fa2cdbfd5e66776..aea4ab5e835f8987dfb2851ff55f679a3c8a1e21 100644
--- a/core/modules/block_content/src/Form/BlockContentTypeDeleteForm.php
+++ b/core/modules/block_content/src/Form/BlockContentTypeDeleteForm.php
@@ -18,8 +18,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       ->condition('type', $this->entity->id())
       ->execute();
     if (!empty($blocks)) {
-      $caption = '<p>' . $this->formatPlural(count($blocks), '%label is used by 1 custom block on your site. You can not remove this block type until you have removed all of the %label blocks.', '%label is used by @count custom blocks on your site. You may not remove %label until you have removed all of the %label custom blocks.', array('%label' => $this->entity->label())) . '</p>';
-      $form['description'] = array('#markup' => $caption);
+      $caption = '<p>' . $this->formatPlural(count($blocks), '%label is used by 1 custom block on your site. You can not remove this block type until you have removed all of the %label blocks.', '%label is used by @count custom blocks on your site. You may not remove %label until you have removed all of the %label custom blocks.', ['%label' => $this->entity->label()]) . '</p>';
+      $form['description'] = ['#markup' => $caption];
       return $form;
     }
     else {
diff --git a/core/modules/block_content/src/Plugin/Block/BlockContentBlock.php b/core/modules/block_content/src/Plugin/Block/BlockContentBlock.php
index 2afd0402ebf04d56ab8b5bd3e7a714a84b4021c7..e97e740187e173d711ca776dc386b48eac43862b 100644
--- a/core/modules/block_content/src/Plugin/Block/BlockContentBlock.php
+++ b/core/modules/block_content/src/Plugin/Block/BlockContentBlock.php
@@ -105,11 +105,11 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'status' => TRUE,
       'info' => '',
       'view_mode' => 'full',
-    );
+    ];
   }
 
   /**
@@ -122,14 +122,14 @@ public function blockForm($form, FormStateInterface $form_state) {
     $block = $this->entityManager->loadEntityByUuid('block_content', $uuid);
     $options = $this->entityManager->getViewModeOptionsByBundle('block_content', $block->bundle());
 
-    $form['view_mode'] = array(
+    $form['view_mode'] = [
       '#type' => 'select',
       '#options' => $options,
       '#title' => $this->t('View mode'),
       '#description' => $this->t('Output the block in this view mode.'),
       '#default_value' => $this->configuration['view_mode'],
       '#access' => (count($options) > 1),
-    );
+    ];
     $form['title']['#description'] = $this->t('The title of the block as shown to the user.');
     return $form;
   }
@@ -161,13 +161,13 @@ public function build() {
       return $this->entityManager->getViewBuilder($block->getEntityTypeId())->view($block, $this->configuration['view_mode']);
     }
     else {
-      return array(
-        '#markup' => $this->t('Block with uuid %uuid does not exist. <a href=":url">Add custom block</a>.', array(
+      return [
+        '#markup' => $this->t('Block with uuid %uuid does not exist. <a href=":url">Add custom block</a>.', [
           '%uuid' => $this->getDerivativeId(),
           ':url' => $this->urlGenerator->generate('block_content.add_page')
-        )),
+        ]),
         '#access' => $this->account->hasPermission('administer blocks')
-      );
+      ];
     }
   }
 
diff --git a/core/modules/block_content/src/Plugin/Derivative/BlockContent.php b/core/modules/block_content/src/Plugin/Derivative/BlockContent.php
index ab564451cb28e55f63562f8fc6b0fa1f58fbe35e..25806c5f1327002ee1904bbc87794d59857f1357 100644
--- a/core/modules/block_content/src/Plugin/Derivative/BlockContent.php
+++ b/core/modules/block_content/src/Plugin/Derivative/BlockContent.php
@@ -50,9 +50,9 @@ public function getDerivativeDefinitions($base_plugin_definition) {
     foreach ($block_contents as $block_content) {
       $this->derivatives[$block_content->uuid()] = $base_plugin_definition;
       $this->derivatives[$block_content->uuid()]['admin_label'] = $block_content->label();
-      $this->derivatives[$block_content->uuid()]['config_dependencies']['content'] = array(
+      $this->derivatives[$block_content->uuid()]['config_dependencies']['content'] = [
         $block_content->getConfigDependencyName()
-      );
+      ];
     }
     return parent::getDerivativeDefinitions($base_plugin_definition);
   }
diff --git a/core/modules/block_content/src/Plugin/migrate/source/d6/Box.php b/core/modules/block_content/src/Plugin/migrate/source/d6/Box.php
index 41352336b402d25c07b9ff70bc57b14cbbe876bb..a28927bd588d4ec8247446ef919d9f5c4e92a0c0 100644
--- a/core/modules/block_content/src/Plugin/migrate/source/d6/Box.php
+++ b/core/modules/block_content/src/Plugin/migrate/source/d6/Box.php
@@ -18,7 +18,7 @@ class Box extends DrupalSqlBase {
    */
   public function query() {
     $query = $this->select('boxes', 'b')
-      ->fields('b', array('bid', 'body', 'info', 'format'));
+      ->fields('b', ['bid', 'body', 'info', 'format']);
     $query->orderBy('b.bid');
 
     return $query;
@@ -28,12 +28,12 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'bid' => $this->t('The numeric identifier of the block/box'),
       'body' => $this->t('The block/box content'),
       'info' => $this->t('Admin title of the block/box.'),
       'format' => $this->t('Input format of the custom block/box content.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/block_content/src/Plugin/migrate/source/d7/BlockCustom.php b/core/modules/block_content/src/Plugin/migrate/source/d7/BlockCustom.php
index 4aee2a4599b42bcb5dc6f014bb29e6a057f704cb..ea336829bfb02d5c69c5422949eb9a7f551e7201 100644
--- a/core/modules/block_content/src/Plugin/migrate/source/d7/BlockCustom.php
+++ b/core/modules/block_content/src/Plugin/migrate/source/d7/BlockCustom.php
@@ -24,12 +24,12 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'bid' => $this->t('The numeric identifier of the block/box'),
       'body' => $this->t('The block/box content'),
       'info' => $this->t('Admin title of the block/box.'),
       'format' => $this->t('Input format of the custom block/box content.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/block_content/src/Plugin/views/area/ListingEmpty.php b/core/modules/block_content/src/Plugin/views/area/ListingEmpty.php
index d2bd02615723e8b9ee392ea964c5b574dff542c1..e412f182ec793ae68cb7960f684562dcd51edbd5 100644
--- a/core/modules/block_content/src/Plugin/views/area/ListingEmpty.php
+++ b/core/modules/block_content/src/Plugin/views/area/ListingEmpty.php
@@ -71,19 +71,19 @@ public static function create(ContainerInterface $container, array $configuratio
   public function render($empty = FALSE) {
     if (!$empty || !empty($this->options['empty'])) {
       /** @var \Drupal\Core\Access\AccessResultInterface|\Drupal\Core\Cache\CacheableDependencyInterface $access_result */
-      $access_result = $this->accessManager->checkNamedRoute('block_content.add_page', array(), $this->currentUser, TRUE);
-      $element = array(
-        '#markup' => $this->t('Add a <a href=":url">custom block</a>.', array(':url' => Url::fromRoute('block_content.add_page')->toString())),
+      $access_result = $this->accessManager->checkNamedRoute('block_content.add_page', [], $this->currentUser, TRUE);
+      $element = [
+        '#markup' => $this->t('Add a <a href=":url">custom block</a>.', [':url' => Url::fromRoute('block_content.add_page')->toString()]),
         '#access' => $access_result->isAllowed(),
         '#cache' => [
           'contexts' => $access_result->getCacheContexts(),
           'tags' => $access_result->getCacheTags(),
           'max-age' => $access_result->getCacheMaxAge(),
         ],
-      );
+      ];
       return $element;
     }
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/block_content/src/Tests/BlockContentCreationTest.php b/core/modules/block_content/src/Tests/BlockContentCreationTest.php
index e45892c5c3c1cf6d93e8c337ddc30d788728aa67..ac9e824d4940d192be75a1e7c43fdc629cbba17d 100644
--- a/core/modules/block_content/src/Tests/BlockContentCreationTest.php
+++ b/core/modules/block_content/src/Tests/BlockContentCreationTest.php
@@ -21,17 +21,17 @@ class BlockContentCreationTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $modules = array('block_content_test', 'dblog', 'field_ui');
+  public static $modules = ['block_content_test', 'dblog', 'field_ui'];
 
   /**
    * Permissions to grant admin user.
    *
    * @var array
    */
-  protected $permissions = array(
+  protected $permissions = [
     'administer blocks',
     'administer block_content display'
-  );
+  ];
 
   /**
    * Sets the test up.
@@ -48,22 +48,22 @@ public function testBlockContentCreation() {
     $this->drupalLogin($this->adminUser);
 
     // Create a block.
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = 'Test Block';
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm('block/add/basic', $edit, t('Save'));
 
     // Check that the Basic block has been created.
-    $this->assertRaw(format_string('@block %name has been created.', array(
+    $this->assertRaw(format_string('@block %name has been created.', [
       '@block' => 'basic',
       '%name' => $edit['info[0][value]']
-    )), 'Basic block created.');
+    ]), 'Basic block created.');
 
     // Check that the view mode setting is hidden because only one exists.
     $this->assertNoFieldByXPath('//select[@name="settings[view_mode]"]', NULL, 'View mode setting hidden because only one exists');
 
     // Check that the block exists in the database.
-    $blocks = entity_load_multiple_by_properties('block_content', array('info' => $edit['info[0][value]']));
+    $blocks = entity_load_multiple_by_properties('block_content', ['info' => $edit['info[0][value]']]);
     $block = reset($blocks);
     $this->assertTrue($block, 'Custom Block found in database.');
 
@@ -72,9 +72,9 @@ public function testBlockContentCreation() {
     $this->drupalPostForm('block/add/basic', $edit, t('Save'));
 
     // Check that the Basic block has been created.
-    $this->assertRaw(format_string('A custom block with block description %value already exists.', array(
+    $this->assertRaw(format_string('A custom block with block description %value already exists.', [
       '%value' => $edit['info[0][value]']
-    )));
+    ]));
     $this->assertResponse(200);
   }
 
@@ -83,28 +83,28 @@ public function testBlockContentCreation() {
    */
   public function testBlockContentCreationMultipleViewModes() {
     // Add a new view mode and verify if it is selected as expected.
-    $this->drupalLogin($this->drupalCreateUser(array('administer display modes')));
+    $this->drupalLogin($this->drupalCreateUser(['administer display modes']));
     $this->drupalGet('admin/structure/display-modes/view/add/block_content');
-    $edit = array(
+    $edit = [
       'id' => 'test_view_mode',
       'label' => 'Test View Mode',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('Saved the %label view mode.', array('%label' => $edit['label'])));
+    $this->assertRaw(t('Saved the %label view mode.', ['%label' => $edit['label']]));
 
     $this->drupalLogin($this->adminUser);
 
     // Create a block.
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = 'Test Block';
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm('block/add/basic', $edit, t('Save'));
 
     // Check that the Basic block has been created.
-    $this->assertRaw(format_string('@block %name has been created.', array(
+    $this->assertRaw(format_string('@block %name has been created.', [
       '@block' => 'basic',
       '%name' => $edit['info[0][value]']
-    )), 'Basic block created.');
+    ]), 'Basic block created.');
 
     // Save our block permanently
     $this->drupalPostForm(NULL, ['region' => 'content'], t('Save block'));
@@ -114,9 +114,9 @@ public function testBlockContentCreationMultipleViewModes() {
     $this->drupalGet('admin/structure/block/block-content/types');
     $this->clickLink(t('Manage display'));
     $this->drupalGet('admin/structure/block/block-content/manage/basic/display');
-    $custom_view_mode = array(
+    $custom_view_mode = [
       'display_modes_custom[test_view_mode]' => 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $custom_view_mode, t('Save'));
 
     // Go to the configure page and change the view mode.
@@ -143,7 +143,7 @@ public function testBlockContentCreationMultipleViewModes() {
     $this->assertFieldByXPath('//select[@name="settings[view_mode]"]/option[@selected="selected"]/@value', 'test_view_mode', 'View mode changed to Test View Mode');
 
     // Check that the block exists in the database.
-    $blocks = entity_load_multiple_by_properties('block_content', array('info' => $edit['info[0][value]']));
+    $blocks = entity_load_multiple_by_properties('block_content', ['info' => $edit['info[0][value]']]);
     $block = reset($blocks);
     $this->assertTrue($block, 'Custom Block found in database.');
 
@@ -152,9 +152,9 @@ public function testBlockContentCreationMultipleViewModes() {
     $this->drupalPostForm('block/add/basic', $edit, t('Save'));
 
     // Check that the Basic block has been created.
-    $this->assertRaw(format_string('A custom block with block description %value already exists.', array(
+    $this->assertRaw(format_string('A custom block with block description %value already exists.', [
       '%value' => $edit['info[0][value]']
-    )));
+    ]));
     $this->assertResponse(200);
   }
 
@@ -165,20 +165,20 @@ public function testBlockContentCreationMultipleViewModes() {
    * type is being used.
    */
   public function testDefaultBlockContentCreation() {
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = $this->randomMachineName(16);
     // Don't pass the custom block type in the url so the default is forced.
     $this->drupalPostForm('block/add', $edit, t('Save'));
 
     // Check that the block has been created and that it is a basic block.
-    $this->assertRaw(format_string('@block %name has been created.', array(
+    $this->assertRaw(format_string('@block %name has been created.', [
       '@block' => 'basic',
       '%name' => $edit['info[0][value]'],
-    )), 'Basic block created.');
+    ]), 'Basic block created.');
 
     // Check that the block exists in the database.
-    $blocks = entity_load_multiple_by_properties('block_content', array('info' => $edit['info[0][value]']));
+    $blocks = entity_load_multiple_by_properties('block_content', ['info' => $edit['info[0][value]']]);
     $block = reset($blocks);
     $this->assertTrue($block, 'Default Custom Block found in database.');
   }
@@ -199,7 +199,7 @@ public function testFailedBlockCreation() {
     if (Database::getConnection()->supportsTransactions()) {
       // Check that the block does not exist in the database.
       $id = db_select('block_content_field_data', 'b')
-        ->fields('b', array('id'))
+        ->fields('b', ['id'])
         ->condition('info', 'fail_creation')
         ->execute()
         ->fetchField();
@@ -208,7 +208,7 @@ public function testFailedBlockCreation() {
     else {
       // Check that the block exists in the database.
       $id = db_select('block_content_field_data', 'b')
-        ->fields('b', array('id'))
+        ->fields('b', ['id'])
         ->condition('info', 'fail_creation')
         ->execute()
         ->fetchField();
@@ -225,18 +225,18 @@ public function testFailedBlockCreation() {
    */
   public function testBlockDelete() {
     // Create a block.
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = $this->randomMachineName(8);
     $body = $this->randomMachineName(16);
     $edit['body[0][value]'] = $body;
     $this->drupalPostForm('block/add/basic', $edit, t('Save'));
 
     // Place the block.
-    $instance = array(
+    $instance = [
       'id' => Unicode::strtolower($edit['info[0][value]']),
       'settings[label]' => $edit['info[0][value]'],
       'region' => 'sidebar_first',
-    );
+    ];
     $block = BlockContent::load(1);
     $url = 'admin/structure/block/add/block_content:' . $block->uuid() . '/' . $this->config('system.theme')->get('default');
     $this->drupalPostForm($url, $instance, t('Save block'));
@@ -254,11 +254,11 @@ public function testBlockDelete() {
     $this->drupalGet('block/1/delete');
     $this->assertText(\Drupal::translation()->formatPlural(1, 'This will also remove 1 placed block instance.', 'This will also remove @count placed block instance.'));
 
-    $this->drupalPostForm(NULL, array(), 'Delete');
-    $this->assertRaw(t('The custom block %name has been deleted.', array('%name' => $edit['info[0][value]'])));
+    $this->drupalPostForm(NULL, [], 'Delete');
+    $this->assertRaw(t('The custom block %name has been deleted.', ['%name' => $edit['info[0][value]']]));
 
     // Create another block and force the plugin cache to flush.
-    $edit2 = array();
+    $edit2 = [];
     $edit2['info[0][value]'] = $this->randomMachineName(8);
     $body2 = $this->randomMachineName(16);
     $edit2['body[0][value]'] = $body2;
@@ -268,7 +268,7 @@ public function testBlockDelete() {
 
     // Create another block with no instances, and test we don't get a
     // confirmation message about deleting instances.
-    $edit3 = array();
+    $edit3 = [];
     $edit3['info[0][value]'] = $this->randomMachineName(8);
     $body = $this->randomMachineName(16);
     $edit3['body[0][value]'] = $body;
@@ -286,16 +286,16 @@ public function testConfigDependencies() {
     $block = $this->createBlockContent();
     // Place the block.
     $block_placement_id = Unicode::strtolower($block->label());
-    $instance = array(
+    $instance = [
       'id' => $block_placement_id,
       'settings[label]' => $block->label(),
       'region' => 'sidebar_first',
-    );
+    ];
     $block = BlockContent::load(1);
     $url = 'admin/structure/block/add/block_content:' . $block->uuid() . '/' . $this->config('system.theme')->get('default');
     $this->drupalPostForm($url, $instance, t('Save block'));
 
-    $dependencies = \Drupal::service('config.manager')->findConfigEntityDependentsAsEntities('content', array($block->getConfigDependencyName()));
+    $dependencies = \Drupal::service('config.manager')->findConfigEntityDependentsAsEntities('content', [$block->getConfigDependencyName()]);
     $block_placement = reset($dependencies);
     $this->assertEqual($block_placement_id, $block_placement->id(), "The block placement config entity has a dependency on the block content entity.");
   }
diff --git a/core/modules/block_content/src/Tests/BlockContentListTest.php b/core/modules/block_content/src/Tests/BlockContentListTest.php
index be8ea5e4c8bf8696317d8c13558c8b9459eb4d20..e00706e9ff5028b853c7c077b1f3f03df784c56e 100644
--- a/core/modules/block_content/src/Tests/BlockContentListTest.php
+++ b/core/modules/block_content/src/Tests/BlockContentListTest.php
@@ -18,13 +18,13 @@ class BlockContentListTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_content', 'config_translation');
+  public static $modules = ['block', 'block_content', 'config_translation'];
 
   /**
    * Tests the custom block listing page.
    */
   public function testListing() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer blocks', 'translate configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['administer blocks', 'translate configuration']));
     $this->drupalGet('admin/structure/block/block-content');
 
     // Test for the page title.
@@ -39,7 +39,7 @@ public function testListing() {
     $this->assertEqual(count($elements), 2, 'Correct number of table header cells found.');
 
     // Test the contents of each th cell.
-    $expected_items = array(t('Block description'), t('Operations'));
+    $expected_items = [t('Block description'), t('Operations')];
     foreach ($elements as $key => $element) {
       $this->assertEqual($element[0], $expected_items[$key]);
     }
@@ -51,7 +51,7 @@ public function testListing() {
     $this->assertLink($link_text);
     $this->clickLink($link_text);
     $this->assertResponse(200);
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = $label;
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm(NULL, $edit, t('Save'));
@@ -72,14 +72,14 @@ public function testListing() {
     $blocks = $this->container
       ->get('entity.manager')
       ->getStorage('block_content')
-      ->loadByProperties(array('info' => $label));
+      ->loadByProperties(['info' => $label]);
     $block = reset($blocks);
     if (!empty($block)) {
       $this->assertLinkByHref('block/' . $block->id());
       $this->clickLink(t('Edit'));
       $this->assertResponse(200);
-      $this->assertTitle(strip_tags(t('Edit custom block %label', array('%label' => $label)) . ' | Drupal'));
-      $edit = array('info[0][value]' => $new_label);
+      $this->assertTitle(strip_tags(t('Edit custom block %label', ['%label' => $label]) . ' | Drupal'));
+      $edit = ['info[0][value]' => $new_label];
       $this->drupalPostForm(NULL, $edit, t('Save'));
     }
     else {
@@ -95,8 +95,8 @@ public function testListing() {
     $delete_text = t('Delete');
     $this->clickLink($delete_text);
     $this->assertResponse(200);
-    $this->assertTitle(strip_tags(t('Are you sure you want to delete the custom block %label?', array('%label' => $new_label)) . ' | Drupal'));
-    $this->drupalPostForm(NULL, array(), $delete_text);
+    $this->assertTitle(strip_tags(t('Are you sure you want to delete the custom block %label?', ['%label' => $new_label]) . ' | Drupal'));
+    $this->drupalPostForm(NULL, [], $delete_text);
 
     // Verify that the text of the label and machine name does not appear in
     // the list (though it may appear elsewhere on the page).
diff --git a/core/modules/block_content/src/Tests/BlockContentListViewsTest.php b/core/modules/block_content/src/Tests/BlockContentListViewsTest.php
index de0ff3bdeb31b49322d4125e240aca504e2d0e02..77117fb009fe6073cb0db07b8f774047a639daf9 100644
--- a/core/modules/block_content/src/Tests/BlockContentListViewsTest.php
+++ b/core/modules/block_content/src/Tests/BlockContentListViewsTest.php
@@ -22,7 +22,7 @@ class BlockContentListViewsTest extends BlockContentTestBase {
    * Tests the custom block listing page.
    */
   public function testListing() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer blocks', 'translate configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['administer blocks', 'translate configuration']));
     $this->drupalGet('admin/structure/block/block-content');
 
     // Test for the page title.
@@ -58,7 +58,7 @@ public function testListing() {
     $this->assertLink($link_text);
     $this->clickLink($link_text);
     $this->assertResponse(200);
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = $label;
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm(NULL, $edit, t('Save'));
@@ -79,14 +79,14 @@ public function testListing() {
     $blocks = $this->container
       ->get('entity.manager')
       ->getStorage('block_content')
-      ->loadByProperties(array('info' => $label));
+      ->loadByProperties(['info' => $label]);
     $block = reset($blocks);
     if (!empty($block)) {
       $this->assertLinkByHref('block/' . $block->id());
       $this->clickLink(t('Edit'));
       $this->assertResponse(200);
-      $this->assertTitle(strip_tags(t('Edit custom block %label', array('%label' => $label)) . ' | Drupal'));
-      $edit = array('info[0][value]' => $new_label);
+      $this->assertTitle(strip_tags(t('Edit custom block %label', ['%label' => $label]) . ' | Drupal'));
+      $edit = ['info[0][value]' => $new_label];
       $this->drupalPostForm(NULL, $edit, t('Save'));
     }
     else {
@@ -102,8 +102,8 @@ public function testListing() {
     $delete_text = t('Delete');
     $this->clickLink($delete_text);
     $this->assertResponse(200);
-    $this->assertTitle(strip_tags(t('Are you sure you want to delete the custom block %label?', array('%label' => $new_label)) . ' | Drupal'));
-    $this->drupalPostForm(NULL, array(), $delete_text);
+    $this->assertTitle(strip_tags(t('Are you sure you want to delete the custom block %label?', ['%label' => $new_label]) . ' | Drupal'));
+    $this->drupalPostForm(NULL, [], $delete_text);
 
     // Verify that the text of the label and machine name does not appear in
     // the list (though it may appear elsewhere on the page).
diff --git a/core/modules/block_content/src/Tests/BlockContentTestBase.php b/core/modules/block_content/src/Tests/BlockContentTestBase.php
index 28c6e227efbfaaf33d3914c1339bb0db8140ab25..3794478d52f9f7f6048c670b8a2ff290467096c4 100644
--- a/core/modules/block_content/src/Tests/BlockContentTestBase.php
+++ b/core/modules/block_content/src/Tests/BlockContentTestBase.php
@@ -31,16 +31,16 @@ abstract class BlockContentTestBase extends WebTestBase {
    *
    * @var array
    */
-  protected $permissions = array(
+  protected $permissions = [
     'administer blocks'
-  );
+  ];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('block', 'block_content');
+  public static $modules = ['block', 'block_content'];
 
   /**
    * Whether or not to auto-create the basic block type during setup.
@@ -78,11 +78,11 @@ protected function setUp() {
    */
   protected function createBlockContent($title = FALSE, $bundle = 'basic', $save = TRUE) {
     $title = $title ?: $this->randomMachineName();
-    $block_content = BlockContent::create(array(
+    $block_content = BlockContent::create([
       'info' => $title,
       'type' => $bundle,
       'langcode' => 'en'
-    ));
+    ]);
     if ($block_content && $save === TRUE) {
       $block_content->save();
     }
@@ -101,11 +101,11 @@ protected function createBlockContent($title = FALSE, $bundle = 'basic', $save =
    *   Created custom block type.
    */
   protected function createBlockContentType($label, $create_body = FALSE) {
-    $bundle = BlockContentType::create(array(
+    $bundle = BlockContentType::create([
       'id' => $label,
       'label' => $label,
       'revision' => FALSE,
-    ));
+    ]);
     $bundle->save();
     if ($create_body) {
       block_content_add_body_field($bundle->id());
diff --git a/core/modules/block_content/src/Tests/BlockContentTranslationUITest.php b/core/modules/block_content/src/Tests/BlockContentTranslationUITest.php
index 332bf3d734474bebf919a7d6988435122664d9f1..198beee8fb3fbabb465282aaf9a203392fbf0b3e 100644
--- a/core/modules/block_content/src/Tests/BlockContentTranslationUITest.php
+++ b/core/modules/block_content/src/Tests/BlockContentTranslationUITest.php
@@ -19,13 +19,13 @@ class BlockContentTranslationUITest extends ContentTranslationUITestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'language',
     'content_translation',
     'block',
     'field_ui',
     'block_content'
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -57,11 +57,11 @@ protected function setUp() {
    */
   protected function setupBundle() {
     // Create the basic bundle since it is provided by standard.
-    $bundle = BlockContentType::create(array(
+    $bundle = BlockContentType::create([
       'id' => $this->bundle,
       'label' => $this->bundle,
       'revision' => FALSE
-    ));
+    ]);
     $bundle->save();
   }
 
@@ -69,12 +69,12 @@ protected function setupBundle() {
    * {@inheritdoc}
    */
   public function getTranslatorPermissions() {
-    return array_merge(parent::getTranslatorPermissions(), array(
+    return array_merge(parent::getTranslatorPermissions(), [
       'translate any entity',
       'access administration pages',
       'administer blocks',
       'administer block_content fields'
-    ));
+    ]);
   }
 
   /**
@@ -93,11 +93,11 @@ public function getTranslatorPermissions() {
   protected function createBlockContent($title = FALSE, $bundle = FALSE) {
     $title = $title ?: $this->randomMachineName();
     $bundle = $bundle ?: $this->bundle;
-    $block_content = BlockContent::create(array(
+    $block_content = BlockContent::create([
       'info' => $title,
       'type' => $bundle,
       'langcode' => 'en'
-    ));
+    ]);
     $block_content->save();
     return $block_content;
   }
@@ -106,7 +106,7 @@ protected function createBlockContent($title = FALSE, $bundle = FALSE) {
    * {@inheritdoc}
    */
   protected function getNewEntityValues($langcode) {
-    return array('info' => Unicode::strtolower($this->randomMachineName())) + parent::getNewEntityValues($langcode);
+    return ['info' => Unicode::strtolower($this->randomMachineName())] + parent::getNewEntityValues($langcode);
   }
 
   /**
@@ -135,7 +135,7 @@ protected function doTestBasicTranslation() {
     $values = $this->getNewEntityValues($default_langcode);
     $storage = \Drupal::entityManager()->getStorage($this->entityTypeId);
     /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
-    $entity = $storage->create(array('type' => 'basic') + $values);
+    $entity = $storage->create(['type' => 'basic'] + $values);
     $entity->save();
     $entity->addTranslation('it', $values);
 
@@ -159,11 +159,11 @@ protected function doTestBasicTranslation() {
   public function testDisabledBundle() {
     // Create a bundle that does not have translation enabled.
     $disabled_bundle = $this->randomMachineName();
-    $bundle = BlockContentType::create(array(
+    $bundle = BlockContentType::create([
       'id' => $disabled_bundle,
       'label' => $disabled_bundle,
       'revision' => FALSE
-    ));
+    ]);
     $bundle->save();
 
     // Create a block content for each bundle.
@@ -171,7 +171,7 @@ public function testDisabledBundle() {
     $disabled_block_content = $this->createBlockContent(FALSE, $bundle->id());
 
     // Make sure that only a single row was inserted into the block table.
-    $rows = db_query('SELECT * FROM {block_content_field_data} WHERE id = :id', array(':id' => $enabled_block_content->id()))->fetchAll();
+    $rows = db_query('SELECT * FROM {block_content_field_data} WHERE id = :id', [':id' => $enabled_block_content->id()])->fetchAll();
     $this->assertEqual(1, count($rows));
   }
 
@@ -188,15 +188,15 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
-        $title = t('<em>Edit @type</em> @title [%language translation]', array(
+        $title = t('<em>Edit @type</em> @title [%language translation]', [
           '@type' => $entity->bundle(),
           '@title' => $entity->getTranslation($langcode)->label(),
           '%language' => $languages[$langcode]->getName(),
-        ));
+        ]);
         $this->assertRaw($title);
       }
     }
diff --git a/core/modules/block_content/src/Tests/BlockContentTypeTest.php b/core/modules/block_content/src/Tests/BlockContentTypeTest.php
index 8f6ffe19d8f5c326d523fbe944cb18000c3bcc54..e69394b883543f558951c54483c6f457292bf840 100644
--- a/core/modules/block_content/src/Tests/BlockContentTypeTest.php
+++ b/core/modules/block_content/src/Tests/BlockContentTypeTest.php
@@ -17,17 +17,17 @@ class BlockContentTypeTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_ui');
+  public static $modules = ['field_ui'];
 
   /**
    * Permissions to grant admin user.
    *
    * @var array
    */
-  protected $permissions = array(
+  protected $permissions = [
     'administer blocks',
     'administer block_content fields'
-  );
+  ];
 
   /**
    * Whether or not to create an initial block type.
@@ -56,10 +56,10 @@ public function testBlockContentTypeCreation() {
     $this->clickLink('block type creation page');
 
     // Create a block type via the user interface.
-    $edit = array(
+    $edit = [
       'id' => 'foo',
       'label' => 'title for foo',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $block_type = BlockContentType::load('foo');
     $this->assertTrue($block_type, 'The new block type has been created.');
@@ -107,9 +107,9 @@ public function testBlockContentTypeEditing() {
     $this->assertRaw('Body', 'Body field was found.');
 
     // Change the block type name.
-    $edit = array(
+    $edit = [
       'label' => 'Bar',
-    );
+    ];
     $this->drupalGet('admin/structure/block/block-content/manage/basic');
     $this->assertTitle(format_string('Edit @type custom block type | Drupal', ['@type' => 'basic']));
     $this->drupalPostForm(NULL, $edit, t('Save'));
@@ -121,9 +121,9 @@ public function testBlockContentTypeEditing() {
     $this->assertUrl(\Drupal::url('block_content.add_form', ['block_content_type' => 'basic'], ['absolute' => TRUE]), [], 'Original machine name was used in URL.');
 
     // Remove the body field.
-    $this->drupalPostForm('admin/structure/block/block-content/manage/basic/fields/block_content.basic.body/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/structure/block/block-content/manage/basic/fields/block_content.basic.body/delete', [], t('Delete'));
     // Resave the settings for this type.
-    $this->drupalPostForm('admin/structure/block/block-content/manage/basic', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/block/block-content/manage/basic', [], t('Save'));
     // Check that the body field doesn't exist.
     $this->drupalGet('block/add/basic');
     $this->assertNoRaw('Body', 'Body field was not found.');
@@ -146,7 +146,7 @@ public function testBlockContentTypeDeletion() {
     // Attempt to delete the block type, which should not be allowed.
     $this->drupalGet('admin/structure/block/block-content/manage/' . $type->id() . '/delete');
     $this->assertRaw(
-      t('%label is used by 1 custom block on your site. You can not remove this block type until you have removed all of the %label blocks.', array('%label' => $type->label())),
+      t('%label is used by 1 custom block on your site. You can not remove this block type until you have removed all of the %label blocks.', ['%label' => $type->label()]),
       'The block type will not be deleted until all blocks of that type are removed.'
     );
     $this->assertNoText(t('This action cannot be undone.'), 'The block type deletion confirmation form is not available.');
@@ -156,7 +156,7 @@ public function testBlockContentTypeDeletion() {
     // Attempt to delete the block type, which should now be allowed.
     $this->drupalGet('admin/structure/block/block-content/manage/' . $type->id() . '/delete');
     $this->assertRaw(
-      t('Are you sure you want to delete the custom block type %type?', array('%type' => $type->id())),
+      t('Are you sure you want to delete the custom block type %type?', ['%type' => $type->id()]),
       'The block type is available for deletion.'
     );
     $this->assertText(t('This action cannot be undone.'), 'The custom block type deletion confirmation form is available.');
@@ -197,22 +197,22 @@ public function testsBlockContentAddTypes() {
         $this->clickLink(t('Add custom block'));
         // The seven theme has markup inside the link, we cannot use clickLink().
         if ($default_theme == 'seven') {
-          $options = $theme != $default_theme ? array('query' => array('theme' => $theme)) : array();
-          $this->assertLinkByHref(\Drupal::url('block_content.add_form', array('block_content_type' => 'foo'), $options));
+          $options = $theme != $default_theme ? ['query' => ['theme' => $theme]] : [];
+          $this->assertLinkByHref(\Drupal::url('block_content.add_form', ['block_content_type' => 'foo'], $options));
           $this->drupalGet('block/add/foo', $options);
         }
         else {
           $this->clickLink('foo');
         }
         // Create a new block.
-        $edit = array('info[0][value]' => $this->randomMachineName(8));
+        $edit = ['info[0][value]' => $this->randomMachineName(8)];
         $this->drupalPostForm(NULL, $edit, t('Save'));
-        $blocks = $storage->loadByProperties(array('info' => $edit['info[0][value]']));
+        $blocks = $storage->loadByProperties(['info' => $edit['info[0][value]']]);
         if (!empty($blocks)) {
           $block = reset($blocks);
-          $this->assertUrl(\Drupal::url('block.admin_add', array('plugin_id' => 'block_content:' . $block->uuid(), 'theme' => $theme), array('absolute' => TRUE)));
+          $this->assertUrl(\Drupal::url('block.admin_add', ['plugin_id' => 'block_content:' . $block->uuid(), 'theme' => $theme], ['absolute' => TRUE]));
           $this->drupalPostForm(NULL, ['region' => 'content'], t('Save block'));
-          $this->assertUrl(\Drupal::url('block.admin_display_theme', array('theme' => $theme), array('absolute' => TRUE, 'query' => array('block-placement' => Html::getClass($edit['info[0][value]'])))));
+          $this->assertUrl(\Drupal::url('block.admin_display_theme', ['theme' => $theme], ['absolute' => TRUE, 'query' => ['block-placement' => Html::getClass($edit['info[0][value]'])]]));
         }
         else {
           $this->fail('Could not load created block.');
@@ -225,11 +225,11 @@ public function testsBlockContentAddTypes() {
     $this->drupalGet('admin/structure/block/block-content');
     $this->clickLink(t('Add custom block'));
     $this->clickLink('foo');
-    $edit = array('info[0][value]' => $this->randomMachineName(8));
+    $edit = ['info[0][value]' => $this->randomMachineName(8)];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $blocks = $storage->loadByProperties(array('info' => $edit['info[0][value]']));
+    $blocks = $storage->loadByProperties(['info' => $edit['info[0][value]']]);
     if (!empty($blocks)) {
-      $this->assertUrl(\Drupal::url('entity.block_content.collection', array(), array('absolute' => TRUE)));
+      $this->assertUrl(\Drupal::url('entity.block_content.collection', [], ['absolute' => TRUE]));
     }
     else {
       $this->fail('Could not load created block.');
diff --git a/core/modules/block_content/src/Tests/Views/BlockContentFieldFilterTest.php b/core/modules/block_content/src/Tests/Views/BlockContentFieldFilterTest.php
index 5a46dddd76c81bdeae928f81213e757416189642..905a7a0053ef5fc4805b3adbca4d3429b3c3feef 100644
--- a/core/modules/block_content/src/Tests/Views/BlockContentFieldFilterTest.php
+++ b/core/modules/block_content/src/Tests/Views/BlockContentFieldFilterTest.php
@@ -15,14 +15,14 @@ class BlockContentFieldFilterTest extends BlockContentTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_field_filters');
+  public static $testViews = ['test_field_filters'];
 
   /**
    * List of block_content infos by language.
@@ -49,15 +49,15 @@ function setUp() {
     $field_storage->save();
 
     // Set up block_content infos.
-    $this->blockContentInfos = array(
+    $this->blockContentInfos = [
       'en' => 'Food in Paris',
       'es' => 'Comida en Paris',
       'fr' => 'Nouriture en Paris',
-    );
+    ];
 
     // Create block_content with translations.
     $block_content = $this->createBlockContent(['info' => $this->blockContentInfos['en'], 'langcode' => 'en', 'type' => 'basic', 'body' => [['value' => $this->blockContentInfos['en']]]]);
-    foreach (array('es', 'fr') as $langcode) {
+    foreach (['es', 'fr'] as $langcode) {
       $translation = $block_content->addTranslation($langcode, ['info' => $this->blockContentInfos[$langcode]]);
       $translation->body->value = $this->blockContentInfos[$langcode];
     }
@@ -70,19 +70,19 @@ function setUp() {
   public function testFilters() {
     // Test the info filter page, which filters for info contains 'Comida'.
     // Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-info-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida info filter');
+    $this->assertPageCounts('test-info-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida info filter');
 
     // Test the body filter page, which filters for body contains 'Comida'.
     // Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-body-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida body filter');
+    $this->assertPageCounts('test-body-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida body filter');
 
     // Test the info Paris filter page, which filters for info contains
     // 'Paris'. Should show each translation once.
-    $this->assertPageCounts('test-info-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris info filter');
+    $this->assertPageCounts('test-info-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris info filter');
 
     // Test the body Paris filter page, which filters for body contains
     // 'Paris'. Should show each translation once.
-    $this->assertPageCounts('test-body-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris body filter');
+    $this->assertPageCounts('test-body-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris body filter');
   }
 
   /**
diff --git a/core/modules/block_content/src/Tests/Views/BlockContentIntegrationTest.php b/core/modules/block_content/src/Tests/Views/BlockContentIntegrationTest.php
index d92c5beb4f0e33bbeb3f9921381fef24db5344f5..8ec17e238165c6dec7a6a585dcf2ace7bfd234c5 100644
--- a/core/modules/block_content/src/Tests/Views/BlockContentIntegrationTest.php
+++ b/core/modules/block_content/src/Tests/Views/BlockContentIntegrationTest.php
@@ -14,23 +14,23 @@ class BlockContentIntegrationTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_block_content_view');
+  public static $testViews = ['test_block_content_view'];
 
   /**
    * Tests basic block_content view with a block_content_type argument.
    */
   public function testBlockContentViewTypeArgument() {
     // Create two content types with three block_contents each.
-    $types = array();
-    $all_ids = array();
-    $block_contents = array();
+    $types = [];
+    $all_ids = [];
+    $block_contents = [];
     for ($i = 0; $i < 2; $i++) {
       $type = $this->createBlockContentType();
       $types[] = $type;
 
       for ($j = 0; $j < 5; $j++) {
         // Ensure the right order of the block_contents.
-        $block_content = $this->createBlockContent(array('type' => $type->id()));
+        $block_content = $this->createBlockContent(['type' => $type->id()]);
         $block_contents[$type->id()][$block_content->id()] = $block_content;
         $all_ids[] = $block_content->id();
       }
@@ -55,9 +55,9 @@ public function testBlockContentViewTypeArgument() {
    * @param array $expected_ids
    *   An array of block_content IDs.
    */
-  protected function assertIds(array $expected_ids = array()) {
+  protected function assertIds(array $expected_ids = []) {
     $result = $this->xpath('//span[@class="field-content"]');
-    $ids = array();
+    $ids = [];
     foreach ($result as $element) {
       $ids[] = (int) $element;
     }
diff --git a/core/modules/block_content/src/Tests/Views/BlockContentRedirectTest.php b/core/modules/block_content/src/Tests/Views/BlockContentRedirectTest.php
index ff80665b579304cd8c85fa91869b4907f8247e33..828aa8468b12f0e355759fe44eeb4d24762c5e10 100644
--- a/core/modules/block_content/src/Tests/Views/BlockContentRedirectTest.php
+++ b/core/modules/block_content/src/Tests/Views/BlockContentRedirectTest.php
@@ -21,18 +21,18 @@ class BlockContentRedirectTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_content', 'views');
+  public static $modules = ['block', 'block_content', 'views'];
 
   /**
    * Tests the redirect destination when editing block content.
    */
   public function testRedirectDestination() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer blocks')));
+    $this->drupalLogin($this->drupalCreateUser(['administer blocks']));
     $this->drupalGet('admin/structure/block/block-content');
 
     // Create a custom block.
     $this->clickLink('custom block');
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = 'Test redirect destination';
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm(NULL, $edit, 'Save');
diff --git a/core/modules/block_content/src/Tests/Views/BlockContentTestBase.php b/core/modules/block_content/src/Tests/Views/BlockContentTestBase.php
index 65d33c88b1bbde485b0e02b160cd2f22fa89140e..db665c9e45ce4e7edeb346a975370aa9d8790584 100644
--- a/core/modules/block_content/src/Tests/Views/BlockContentTestBase.php
+++ b/core/modules/block_content/src/Tests/Views/BlockContentTestBase.php
@@ -25,26 +25,26 @@ abstract class BlockContentTestBase extends ViewTestBase {
    *
    * @var array
    */
-  protected $permissions = array(
+  protected $permissions = [
     'administer blocks',
-  );
+  ];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('block', 'block_content', 'block_content_test_views');
+  public static $modules = ['block', 'block_content', 'block_content_test_views'];
 
   protected function setUp($import_test_views = TRUE) {
     parent::setUp($import_test_views);
     // Ensure the basic bundle exists. This is provided by the standard profile.
-    $this->createBlockContentType(array('id' => 'basic'));
+    $this->createBlockContentType(['id' => 'basic']);
 
     $this->adminUser = $this->drupalCreateUser($this->permissions);
 
     if ($import_test_views) {
-      ViewTestData::createTestViews(get_class($this), array('block_content_test_views'));
+      ViewTestData::createTestViews(get_class($this), ['block_content_test_views']);
     }
   }
 
@@ -58,17 +58,17 @@ protected function setUp($import_test_views = TRUE) {
    * @return \Drupal\block_content\Entity\BlockContent
    *   Created custom block.
    */
-  protected function createBlockContent(array $settings = array()) {
+  protected function createBlockContent(array $settings = []) {
     $status = 0;
-    $settings += array(
+    $settings += [
       'info' => $this->randomMachineName(),
       'type' => 'basic',
       'langcode' => 'en',
-    );
+    ];
     if ($block_content = BlockContent::create($settings)) {
       $status = $block_content->save();
     }
-    $this->assertEqual($status, SAVED_NEW, SafeMarkup::format('Created block content %info.', array('%info' => $block_content->label())));
+    $this->assertEqual($status, SAVED_NEW, SafeMarkup::format('Created block content %info.', ['%info' => $block_content->label()]));
     return $block_content;
   }
 
@@ -81,7 +81,7 @@ protected function createBlockContent(array $settings = array()) {
    * @return \Drupal\block_content\Entity\BlockContentType
    *   Created custom block type.
    */
-  protected function createBlockContentType(array $values = array()) {
+  protected function createBlockContentType(array $values = []) {
     // Find a non-existent random type name.
     if (!isset($values['id'])) {
       do {
@@ -91,16 +91,16 @@ protected function createBlockContentType(array $values = array()) {
     else {
       $id = $values['id'];
     }
-    $values += array(
+    $values += [
       'id' => $id,
       'label' => $id,
       'revision' => FALSE
-    );
+    ];
     $bundle = BlockContentType::create($values);
     $status = $bundle->save();
     block_content_add_body_field($bundle->id());
 
-    $this->assertEqual($status, SAVED_NEW, SafeMarkup::format('Created block content type %bundle.', array('%bundle' => $bundle->id())));
+    $this->assertEqual($status, SAVED_NEW, SafeMarkup::format('Created block content type %bundle.', ['%bundle' => $bundle->id()]));
     return $bundle;
   }
 
diff --git a/core/modules/block_content/src/Tests/Views/FieldTypeTest.php b/core/modules/block_content/src/Tests/Views/FieldTypeTest.php
index f14653fea3d2b52dbfcf1f646f2a79b97fa12757..e9aa336985370ae893f5e2cfc8aa18d05269f646 100644
--- a/core/modules/block_content/src/Tests/Views/FieldTypeTest.php
+++ b/core/modules/block_content/src/Tests/Views/FieldTypeTest.php
@@ -16,18 +16,18 @@ class FieldTypeTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_field_type');
+  public static $testViews = ['test_field_type'];
 
   public function testFieldType() {
     $block_content = $this->createBlockContent();
-    $expected_result[] = array(
+    $expected_result[] = [
       'id' => $block_content->id(),
       'type' => $block_content->bundle(),
-    );
-    $column_map = array(
+    ];
+    $column_map = [
       'id' => 'id',
       'type:target_id' => 'type',
-    );
+    ];
 
     $view = Views::getView('test_field_type');
     $this->executeView($view);
diff --git a/core/modules/block_content/src/Tests/Views/RevisionRelationshipsTest.php b/core/modules/block_content/src/Tests/Views/RevisionRelationshipsTest.php
index 516705d2b2220972408b95338df37e2cf4160fb9..7bad093dd3a6b727c8a0c7128c1bf918f32c21c6 100644
--- a/core/modules/block_content/src/Tests/Views/RevisionRelationshipsTest.php
+++ b/core/modules/block_content/src/Tests/Views/RevisionRelationshipsTest.php
@@ -20,72 +20,72 @@ class RevisionRelationshipsTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('block_content' , 'block_content_test_views');
+  public static $modules = ['block_content' , 'block_content_test_views'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_block_content_revision_id', 'test_block_content_revision_revision_id');
+  public static $testViews = ['test_block_content_revision_id', 'test_block_content_revision_revision_id'];
 
   protected function setUp() {
     parent::setUp();
-    BlockContentType::create(array(
+    BlockContentType::create([
       'id' => 'basic',
       'label' => 'basic',
       'revision' => TRUE,
-    ));
-    ViewTestData::createTestViews(get_class($this), array('block_content_test_views'));
+    ]);
+    ViewTestData::createTestViews(get_class($this), ['block_content_test_views']);
   }
 
   /**
    * Create a block_content with revision and rest result count for both views.
    */
   public function testBlockContentRevisionRelationship() {
-    $block_content = BlockContent::create(array(
+    $block_content = BlockContent::create([
       'info' => $this->randomMachineName(),
       'type' => 'basic',
       'langcode' => 'en',
-    ));
+    ]);
     $block_content->save();
     // Create revision of the block_content.
     $block_content_revision = clone $block_content;
     $block_content_revision->setNewRevision();
     $block_content_revision->save();
-    $column_map = array(
+    $column_map = [
       'revision_id' => 'revision_id',
       'id_1' => 'id_1',
       'block_content_field_data_block_content_field_revision_id' => 'block_content_field_data_block_content_field_revision_id',
-    );
+    ];
 
     // Here should be two rows.
     $view_id = Views::getView('test_block_content_revision_id');
-    $this->executeView($view_id, array($block_content->id()));
-    $resultset_id = array(
-      array(
+    $this->executeView($view_id, [$block_content->id()]);
+    $resultset_id = [
+      [
         'revision_id' => '1',
         'id_1' => '1',
         'block_content_field_data_block_content_field_revision_id' => '1',
-      ),
-      array(
+      ],
+      [
         'revision_id' => '2',
         'id_1' => '1',
         'block_content_field_data_block_content_field_revision_id' => '1',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view_id, $resultset_id, $column_map);
 
     // There should be only one row with active revision 2.
     $view_revision_id = Views::getView('test_block_content_revision_revision_id');
-    $this->executeView($view_revision_id, array($block_content->id()));
-    $resultset_revision_id = array(
-      array(
+    $this->executeView($view_revision_id, [$block_content->id()]);
+    $resultset_revision_id = [
+      [
         'revision_id' => '2',
         'id_1' => '1',
         'block_content_field_data_block_content_field_revision_id' => '1',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view_revision_id, $resultset_revision_id, $column_map);
   }
 
diff --git a/core/modules/block_content/tests/modules/block_content_test/block_content_test.module b/core/modules/block_content/tests/modules/block_content_test/block_content_test.module
index 57ea2a6864c12758fba53997d457fbf215a0de41..0489a617b6210f90ce9ce0dc253580c71ec94540 100644
--- a/core/modules/block_content/tests/modules/block_content_test/block_content_test.module
+++ b/core/modules/block_content/tests/modules/block_content_test/block_content_test.module
@@ -15,9 +15,9 @@
  */
 function block_content_test_block_content_view(array &$build, BlockContent $block_content, $view_mode) {
   // Add extra content.
-  $build['extra_content'] = array(
+  $build['extra_content'] = [
     '#markup' => '<blink>Yowser</blink>',
-  );
+  ];
 }
 
 /**
diff --git a/core/modules/block_content/tests/src/Functional/BlockContentCacheTagsTest.php b/core/modules/block_content/tests/src/Functional/BlockContentCacheTagsTest.php
index f44a773bfd130b26154377126c91adcb8eefcfa0..e00de6b5a92794e0aaf0e97e4dd7212d8a121b83 100644
--- a/core/modules/block_content/tests/src/Functional/BlockContentCacheTagsTest.php
+++ b/core/modules/block_content/tests/src/Functional/BlockContentCacheTagsTest.php
@@ -20,29 +20,29 @@ class BlockContentCacheTagsTest extends EntityCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('block_content');
+  public static $modules = ['block_content'];
 
   /**
    * {@inheritdoc}
    */
   protected function createEntity() {
-    $block_content_type = BlockContentType::create(array(
+    $block_content_type = BlockContentType::create([
       'id' => 'basic',
       'label' => 'basic',
       'revision' => FALSE
-    ));
+    ]);
     $block_content_type->save();
     block_content_add_body_field($block_content_type->id());
 
     // Create a "Llama" custom block.
-    $block_content = BlockContent::create(array(
+    $block_content = BlockContent::create([
       'info' => 'Llama',
       'type' => 'basic',
-      'body' => array(
+      'body' => [
         'value' => 'The name "llama" was adopted by European settlers from native Peruvians.',
         'format' => 'plain_text',
-      ),
-    ));
+      ],
+    ]);
     $block_content->save();
 
     return $block_content;
diff --git a/core/modules/block_content/tests/src/Functional/BlockContentPageViewTest.php b/core/modules/block_content/tests/src/Functional/BlockContentPageViewTest.php
index 8c55da3c0cdc720c03042043d7bfb9d740b26598..355faf1f0f4a3c87faee0e2ac9117e2baade6c06 100644
--- a/core/modules/block_content/tests/src/Functional/BlockContentPageViewTest.php
+++ b/core/modules/block_content/tests/src/Functional/BlockContentPageViewTest.php
@@ -14,7 +14,7 @@ class BlockContentPageViewTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $modules = array('block_content_test');
+  public static $modules = ['block_content_test'];
 
   /**
    * Checks block edit and fallback functionality.
diff --git a/core/modules/block_content/tests/src/Functional/BlockContentRevisionsTest.php b/core/modules/block_content/tests/src/Functional/BlockContentRevisionsTest.php
index 33f75ed4fa8316402b6a9017fc69b009dcdd486b..fa88c64c261bc3f95661ba24e63190aacceabe46 100644
--- a/core/modules/block_content/tests/src/Functional/BlockContentRevisionsTest.php
+++ b/core/modules/block_content/tests/src/Functional/BlockContentRevisionsTest.php
@@ -37,8 +37,8 @@ protected function setUp() {
     // Create initial block.
     $block = $this->createBlockContent('initial');
 
-    $blocks = array();
-    $logs = array();
+    $blocks = [];
+    $logs = [];
 
     // Get original block.
     $blocks[] = $block->getRevisionId();
@@ -74,9 +74,9 @@ public function testRevisions() {
         ->getStorage('block_content')
         ->loadRevision($revision_id);
       // Verify revision log is the same.
-      $this->assertEqual($loaded->getRevisionLogMessage(), $logs[$delta], format_string('Correct log message found for revision @revision', array(
+      $this->assertEqual($loaded->getRevisionLogMessage(), $logs[$delta], format_string('Correct log message found for revision @revision', [
         '@revision' => $loaded->getRevisionId(),
-      )));
+      ]));
       if ($delta > 0) {
         $this->assertTrue($loaded->getRevisionUser() instanceof UserInterface, 'Revision User found.');
         $this->assertTrue(is_numeric($loaded->getRevisionUserId()), 'Revision User ID found.');
diff --git a/core/modules/block_content/tests/src/Functional/BlockContentSaveTest.php b/core/modules/block_content/tests/src/Functional/BlockContentSaveTest.php
index a68f4233df49099f79363fbd5647fc83bfde2f64..0f7ae5a2e6896f344bc3bd8bd181c98952da66eb 100644
--- a/core/modules/block_content/tests/src/Functional/BlockContentSaveTest.php
+++ b/core/modules/block_content/tests/src/Functional/BlockContentSaveTest.php
@@ -16,7 +16,7 @@ class BlockContentSaveTest extends BlockContentTestBase {
    *
    * @var array
    */
-  public static $modules = array('block_content_test');
+  public static $modules = ['block_content_test'];
 
   /**
    * Sets the test up.
@@ -35,12 +35,12 @@ public function testImport() {
     $max_id = db_query('SELECT MAX(id) FROM {block_content}')->fetchField();
     $test_id = $max_id + mt_rand(1000, 1000000);
     $info = $this->randomMachineName(8);
-    $block_array = array(
+    $block_array = [
       'info' => $info,
-      'body' => array('value' => $this->randomMachineName(32)),
+      'body' => ['value' => $this->randomMachineName(32)],
       'type' => 'basic',
       'id' => $test_id
-    );
+    ];
     $block = BlockContent::create($block_array);
     $block->enforceIsNew(TRUE);
     $block->save();
diff --git a/core/modules/block_content/tests/src/Functional/BlockContentTestBase.php b/core/modules/block_content/tests/src/Functional/BlockContentTestBase.php
index e5e7736409bf4a349de11f72e7ba01aed1aaad61..45c7e2699985336f28d0057974bb24d189c1a61f 100644
--- a/core/modules/block_content/tests/src/Functional/BlockContentTestBase.php
+++ b/core/modules/block_content/tests/src/Functional/BlockContentTestBase.php
@@ -28,16 +28,16 @@ abstract class BlockContentTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  protected $permissions = array(
+  protected $permissions = [
     'administer blocks'
-  );
+  ];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('block', 'block_content');
+  public static $modules = ['block', 'block_content'];
 
   /**
    * Whether or not to auto-create the basic block type during setup.
@@ -75,11 +75,11 @@ protected function setUp() {
    */
   protected function createBlockContent($title = FALSE, $bundle = 'basic', $save = TRUE) {
     $title = $title ?: $this->randomMachineName();
-    $block_content = BlockContent::create(array(
+    $block_content = BlockContent::create([
       'info' => $title,
       'type' => $bundle,
       'langcode' => 'en'
-    ));
+    ]);
     if ($block_content && $save === TRUE) {
       $block_content->save();
     }
@@ -98,11 +98,11 @@ protected function createBlockContent($title = FALSE, $bundle = 'basic', $save =
    *   Created custom block type.
    */
   protected function createBlockContentType($label, $create_body = FALSE) {
-    $bundle = BlockContentType::create(array(
+    $bundle = BlockContentType::create([
       'id' => $label,
       'label' => $label,
       'revision' => FALSE,
-    ));
+    ]);
     $bundle->save();
     if ($create_body) {
       block_content_add_body_field($bundle->id());
diff --git a/core/modules/block_content/tests/src/Functional/PageEditTest.php b/core/modules/block_content/tests/src/Functional/PageEditTest.php
index bab2a2992b585802f2f0f19a50924c61c846cd63..41638bd2bc213514915c6b81680c47923afd09be 100644
--- a/core/modules/block_content/tests/src/Functional/PageEditTest.php
+++ b/core/modules/block_content/tests/src/Functional/PageEditTest.php
@@ -27,7 +27,7 @@ public function testPageEdit() {
     $title_key = 'info[0][value]';
     $body_key = 'body[0][value]';
     // Create block to edit.
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = Unicode::strtolower($this->randomMachineName(8));
     $edit[$body_key] = $this->randomMachineName(16);
     $this->drupalPostForm('block/add/basic', $edit, t('Save'));
@@ -43,7 +43,7 @@ public function testPageEdit() {
     $this->assertFieldByName($body_key, $edit[$body_key], 'Body field displayed.');
 
     // Edit the content of the block.
-    $edit = array();
+    $edit = [];
     $edit[$title_key] = $this->randomMachineName(8);
     $edit[$body_key] = $this->randomMachineName(16);
     // Stay on the current page, without reloading.
@@ -51,21 +51,21 @@ public function testPageEdit() {
 
     // Edit the same block, creating a new revision.
     $this->drupalGet("block/" . $block->id());
-    $edit = array();
+    $edit = [];
     $edit['info[0][value]'] = $this->randomMachineName(8);
     $edit[$body_key] = $this->randomMachineName(16);
     $edit['revision'] = TRUE;
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     // Ensure that the block revision has been created.
-    \Drupal::entityManager()->getStorage('block_content')->resetCache(array($block->id()));
+    \Drupal::entityManager()->getStorage('block_content')->resetCache([$block->id()]);
     $revised_block = BlockContent::load($block->id());
     $this->assertNotIdentical($block->getRevisionId(), $revised_block->getRevisionId(), 'A new revision has been created.');
 
     // Test deleting the block.
     $this->drupalGet("block/" . $revised_block->id());
     $this->clickLink(t('Delete'));
-    $this->assertText(format_string('Are you sure you want to delete the custom block @label?', array('@label' => $revised_block->label())));
+    $this->assertText(format_string('Are you sure you want to delete the custom block @label?', ['@label' => $revised_block->label()]));
   }
 
 }
diff --git a/core/modules/block_content/tests/src/Kernel/Migrate/MigrateBlockContentBodyFieldTest.php b/core/modules/block_content/tests/src/Kernel/Migrate/MigrateBlockContentBodyFieldTest.php
index 0bf29fdc6a2de4a8af8a7712e24da34a21239ac2..7d343738c9b7106d08bb62321366393b5f0fbbbc 100644
--- a/core/modules/block_content/tests/src/Kernel/Migrate/MigrateBlockContentBodyFieldTest.php
+++ b/core/modules/block_content/tests/src/Kernel/Migrate/MigrateBlockContentBodyFieldTest.php
@@ -15,7 +15,7 @@
  */
 class MigrateBlockContentBodyFieldTest extends MigrateDrupal7TestBase {
 
-  public static $modules = array('block', 'block_content', 'filter', 'text');
+  public static $modules = ['block', 'block_content', 'filter', 'text'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/block_content/tests/src/Kernel/Migrate/MigrateBlockContentTypeTest.php b/core/modules/block_content/tests/src/Kernel/Migrate/MigrateBlockContentTypeTest.php
index 9a3cbf04669290c41e8428b6bf5182f58db3bc8a..4accc2040b7011c2a94691ea0aded3472dfd13c9 100644
--- a/core/modules/block_content/tests/src/Kernel/Migrate/MigrateBlockContentTypeTest.php
+++ b/core/modules/block_content/tests/src/Kernel/Migrate/MigrateBlockContentTypeTest.php
@@ -13,7 +13,7 @@
  */
 class MigrateBlockContentTypeTest extends MigrateDrupal7TestBase {
 
-  public static $modules = array('block', 'block_content', 'filter', 'text');
+  public static $modules = ['block', 'block_content', 'filter', 'text'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/block_content/tests/src/Kernel/Migrate/d7/MigrateCustomBlockTest.php b/core/modules/block_content/tests/src/Kernel/Migrate/d7/MigrateCustomBlockTest.php
index 42990db760f2f9d6b21fc587f36ba44f0a77cf33..706a7ccf05cb69d6467035a380d76c6806723136 100644
--- a/core/modules/block_content/tests/src/Kernel/Migrate/d7/MigrateCustomBlockTest.php
+++ b/core/modules/block_content/tests/src/Kernel/Migrate/d7/MigrateCustomBlockTest.php
@@ -13,11 +13,11 @@
  */
 class MigrateCustomBlockTest extends MigrateDrupal7TestBase {
 
-  public static $modules = array(
+  public static $modules = [
     'block_content',
     'filter',
     'text',
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/block_content/tests/src/Unit/Menu/BlockContentLocalTasksTest.php b/core/modules/block_content/tests/src/Unit/Menu/BlockContentLocalTasksTest.php
index 3ab934c0a2330568553d2b12d522e9002c130700..ced7e84c30c00e8aa4b195262d9216cfe23629bf 100644
--- a/core/modules/block_content/tests/src/Unit/Menu/BlockContentLocalTasksTest.php
+++ b/core/modules/block_content/tests/src/Unit/Menu/BlockContentLocalTasksTest.php
@@ -13,32 +13,32 @@
 class BlockContentLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array(
+    $this->directoryList = [
       'block' => 'core/modules/block',
       'block_content' => 'core/modules/block_content',
-    );
+    ];
     parent::setUp();
 
-    $config_factory = $this->getConfigFactoryStub(array('system.theme' => array(
+    $config_factory = $this->getConfigFactoryStub(['system.theme' => [
       'default' => 'test_c',
-    )));
+    ]]);
 
-    $themes = array();
-    $themes['test_a'] = (object) array(
+    $themes = [];
+    $themes['test_a'] = (object) [
       'status' => 0,
-    );
-    $themes['test_b'] = (object) array(
+    ];
+    $themes['test_b'] = (object) [
       'status' => 1,
-      'info' => array(
+      'info' => [
         'name' => 'test_b',
-      ),
-    );
-    $themes['test_c'] = (object) array(
+      ],
+    ];
+    $themes['test_c'] = (object) [
       'status' => 1,
-      'info' => array(
+      'info' => [
         'name' => 'test_c',
-      ),
-    );
+      ],
+    ];
     $theme_handler = $this->getMock('Drupal\Core\Extension\ThemeHandlerInterface');
     $theme_handler->expects($this->any())
       ->method('listInfo')
@@ -56,25 +56,25 @@ protected function setUp() {
    * @dataProvider getBlockContentListingRoutes
    */
   public function testBlockContentListLocalTasks($route) {
-    $this->assertLocalTasks($route, array(
-      0 => array(
+    $this->assertLocalTasks($route, [
+      0 => [
         'block.admin_display',
         'entity.block_content.collection',
-      ),
-      1 => array(
+      ],
+      1 => [
         'block_content.list_sub',
         'entity.block_content_type.collection',
-      ),
-    ));
+      ],
+    ]);
   }
 
   /**
    * Provides a list of routes to test.
    */
   public function getBlockContentListingRoutes() {
-    return array(
-      array('entity.block_content.collection', 'entity.block_content_type.collection'),
-    );
+    return [
+      ['entity.block_content.collection', 'entity.block_content_type.collection'],
+    ];
   }
 
 }
diff --git a/core/modules/book/book.install b/core/modules/book/book.install
index 76ddc81ed0cec01ce313d6ec41410b2ff9f92e08..77044833651f7fa7e298a6a634c78b8ad96cbb3a 100644
--- a/core/modules/book/book.install
+++ b/core/modules/book/book.install
@@ -17,119 +17,119 @@ function book_uninstall() {
  * Implements hook_schema().
  */
 function book_schema() {
-  $schema['book'] = array(
+  $schema['book'] = [
   'description' => 'Stores book outline information. Uniquely defines the location of each node in the book outline',
-    'fields' => array(
-      'nid' => array(
+    'fields' => [
+      'nid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => "The book page's {node}.nid.",
-      ),
-      'bid' => array(
+      ],
+      'bid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => "The book ID is the {book}.nid of the top-level page.",
-      ),
-      'pid' => array(
+      ],
+      'pid' => [
         'description' => 'The parent ID (pid) is the id of the node above in the hierarchy, or zero if the node is at the top level in its outline.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'has_children' => array(
+      ],
+      'has_children' => [
         'description' => 'Flag indicating whether any nodes have this node as a parent (1 = children exist, 0 = no children).',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'size' => 'small',
-      ),
-      'weight' => array(
+      ],
+      'weight' => [
         'description' => 'Weight among book entries in the same book at the same depth.',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'depth' => array(
+      ],
+      'depth' => [
         'description' => 'The depth relative to the top level. A link with pid == 0 will have depth == 1.',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'size' => 'small',
-      ),
-      'p1' => array(
+      ],
+      'p1' => [
         'description' => 'The first nid in the materialized path. If N = depth, then pN must equal the nid. If depth > 1 then p(N-1) must equal the pid. All pX where X > depth must equal zero. The columns p1 .. p9 are also called the parents.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'p2' => array(
+      ],
+      'p2' => [
         'description' => 'The second nid in the materialized path. See p1.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'p3' => array(
+      ],
+      'p3' => [
         'description' => 'The third nid in the materialized path. See p1.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'p4' => array(
+      ],
+      'p4' => [
         'description' => 'The fourth nid in the materialized path. See p1.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'p5' => array(
+      ],
+      'p5' => [
         'description' => 'The fifth nid in the materialized path. See p1.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'p6' => array(
+      ],
+      'p6' => [
         'description' => 'The sixth nid in the materialized path. See p1.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'p7' => array(
+      ],
+      'p7' => [
         'description' => 'The seventh nid in the materialized path. See p1.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'p8' => array(
+      ],
+      'p8' => [
         'description' => 'The eighth nid in the materialized path. See p1.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'p9' => array(
+      ],
+      'p9' => [
         'description' => 'The ninth nid in the materialized path. See p1.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'primary key' => array('nid'),
-    'indexes' => array(
-      'book_parents' => array('bid', 'p1', 'p2', 'p3', 'p4', 'p5', 'p6', 'p7', 'p8', 'p9'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['nid'],
+    'indexes' => [
+      'book_parents' => ['bid', 'p1', 'p2', 'p3', 'p4', 'p5', 'p6', 'p7', 'p8', 'p9'],
+    ],
+  ];
 
   return $schema;
 }
diff --git a/core/modules/book/book.module b/core/modules/book/book.module
index ecccb7452720dac3732a7d00784b9cb61d44f501..988201ee1e541691e9abed142cbb20a2a87b0dbc 100644
--- a/core/modules/book/book.module
+++ b/core/modules/book/book.module
@@ -25,17 +25,17 @@ function book_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.book':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Book module is used for creating structured, multi-page content, such as site resource guides, manuals, and wikis. It allows you to create content that has chapters, sections, subsections, or any similarly-tiered structure. Enabling the module creates a new content type <em>Book page</em>. For more information, see the <a href=":book">online documentation for the Book module</a>.', array(':book' => 'https://www.drupal.org/documentation/modules/book')) . '</p>';
+      $output .= '<p>' . t('The Book module is used for creating structured, multi-page content, such as site resource guides, manuals, and wikis. It allows you to create content that has chapters, sections, subsections, or any similarly-tiered structure. Enabling the module creates a new content type <em>Book page</em>. For more information, see the <a href=":book">online documentation for the Book module</a>.', [':book' => 'https://www.drupal.org/documentation/modules/book']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Adding and managing book content') . '</dt>';
       $output .= '<dd>' . t('Books have a hierarchical structure, called a <em>book outline</em>. Each book outline can have nested pages up to nine levels deep. Multiple content types can be configured to behave as a book outline. From the content edit form, it is possible to add a page to a book outline or create a new book.') . '</dd>';
-      $output .= '<dd>' . t('You can assign separate permissions for <em>creating new books</em> as well as <em>creating</em>, <em>editing</em> and <em>deleting</em> book content. Users with the <em>Administer book outlines</em> permission can add <em>any</em> type of content to a book by selecting the appropriate book outline while editing the content. They can also view a list of all books, and edit and rearrange section titles on the <a href=":admin-book">Book list page</a>.', array(':admin-book' => \Drupal::url('book.admin'))) . '</dd>';
+      $output .= '<dd>' . t('You can assign separate permissions for <em>creating new books</em> as well as <em>creating</em>, <em>editing</em> and <em>deleting</em> book content. Users with the <em>Administer book outlines</em> permission can add <em>any</em> type of content to a book by selecting the appropriate book outline while editing the content. They can also view a list of all books, and edit and rearrange section titles on the <a href=":admin-book">Book list page</a>.', [':admin-book' => \Drupal::url('book.admin')]) . '</dd>';
       $output .= '<dt>' . t('Configuring content types for books') . '</dt>';
-      $output .= '<dd>' . t('The <em>Book page</em> content type is the initial content type enabled for book outlines. On the <a href=":admin-settings">Book settings page</a> you can configure content types that can used in book outlines.', array(':admin-settings' => \Drupal::url('book.settings'))) . '</dd>';
-      $output .= '<dd>' . t('Users with the <em>Add content and child pages to books</em> permission will see a link to <em>Add child page</em> when viewing a content item that is part of a book outline. This link will allow users to create a new content item of the content type you select on the <a href=":admin-settings">Book settings page</a>. By default this is the <em>Book page</em> content type.', array(':admin-settings' => \Drupal::url('book.settings'))) . '</dd>';
+      $output .= '<dd>' . t('The <em>Book page</em> content type is the initial content type enabled for book outlines. On the <a href=":admin-settings">Book settings page</a> you can configure content types that can used in book outlines.', [':admin-settings' => \Drupal::url('book.settings')]) . '</dd>';
+      $output .= '<dd>' . t('Users with the <em>Add content and child pages to books</em> permission will see a link to <em>Add child page</em> when viewing a content item that is part of a book outline. This link will allow users to create a new content item of the content type you select on the <a href=":admin-settings">Book settings page</a>. By default this is the <em>Book page</em> content type.', [':admin-settings' => \Drupal::url('book.settings')]) . '</dd>';
       $output .= '<dt>' . t('Book navigation') . '</dt>';
-      $output .= '<dd>' . t("Book pages have a default book-specific navigation block. This navigation block contains links that lead to the previous and next pages in the book, and to the level above the current page in the book's structure. This block can be enabled on the <a href=':admin-block'>Blocks layout page</a>. For book pages to show up in the book navigation, they must be added to a book outline.", array(':admin-block' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
+      $output .= '<dd>' . t("Book pages have a default book-specific navigation block. This navigation block contains links that lead to the previous and next pages in the book, and to the level above the current page in the book's structure. This block can be enabled on the <a href=':admin-block'>Blocks layout page</a>. For book pages to show up in the book navigation, they must be added to a book outline.", [':admin-block' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#']) . '</dd>';
       $output .= '<dt>' . t('Collaboration') . '</dt>';
       $output .= '<dd>' . t('Books can be created collaboratively, as they allow users with appropriate permissions to add pages into existing books, and add those pages to a custom table of contents.') . '</dd>';
       $output .= '<dt>' . t('Printing books') . '</dt>';
@@ -47,7 +47,7 @@ function book_help($route_name, RouteMatchInterface $route_match) {
       return '<p>' . t('The book module offers a means to organize a collection of related content pages, collectively known as a book. When viewed, this content automatically displays links to adjacent book pages, providing a simple navigation system for creating and reviewing structured content.') . '</p>';
 
     case 'entity.node.book_outline_form':
-      return '<p>' . t('The outline feature allows you to include pages in the <a href=":book">Book hierarchy</a>, as well as move them within the hierarchy or to <a href=":book-admin">reorder an entire book</a>.', array(':book' => \Drupal::url('book.render'), ':book-admin' => \Drupal::url('book.admin'))) . '</p>';
+      return '<p>' . t('The outline feature allows you to include pages in the <a href=":book">Book hierarchy</a>, as well as move them within the hierarchy or to <a href=":book-admin">reorder an entire book</a>.', [':book' => \Drupal::url('book.render'), ':book-admin' => \Drupal::url('book.admin')]) . '</p>';
   }
 }
 
@@ -55,23 +55,23 @@ function book_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function book_theme() {
-  return array(
-    'book_navigation' => array(
-      'variables' => array('book_link' => NULL),
-    ),
-    'book_tree' => array(
-      'variables' => array('items' => array(), 'attributes' => array()),
-    ),
-    'book_export_html' => array(
-      'variables' => array('title' => NULL, 'contents' => NULL, 'depth' => NULL),
-    ),
-    'book_all_books_block' => array(
+  return [
+    'book_navigation' => [
+      'variables' => ['book_link' => NULL],
+    ],
+    'book_tree' => [
+      'variables' => ['items' => [], 'attributes' => []],
+    ],
+    'book_export_html' => [
+      'variables' => ['title' => NULL, 'contents' => NULL, 'depth' => NULL],
+    ],
+    'book_all_books_block' => [
       'render element' => 'book_menus',
-    ),
-    'book_node_export_html' => array(
-      'variables' => array('node' => NULL, 'content' => NULL, 'children' => NULL),
-    ),
-  );
+    ],
+    'book_node_export_html' => [
+      'variables' => ['node' => NULL, 'content' => NULL, 'children' => NULL],
+    ],
+  ];
 }
 
 /**
@@ -97,31 +97,31 @@ function book_node_links_alter(array &$links, NodeInterface $node, array &$conte
         $child_type = \Drupal::config('book.settings')->get('child_type');
         $access_control_handler = \Drupal::entityManager()->getAccessControlHandler('node');
         if (($account->hasPermission('add content to books') || $account->hasPermission('administer book outlines')) && $access_control_handler->createAccess($child_type) && $node->isPublished() && $node->book['depth'] < BookManager::BOOK_MAX_DEPTH) {
-          $book_links['book_add_child'] = array(
+          $book_links['book_add_child'] = [
             'title' => t('Add child page'),
             'url' => Url::fromRoute('node.add', ['node_type' => $child_type], ['query' => ['parent' => $node->id()]]),
-          );
+          ];
         }
 
         if ($account->hasPermission('access printer-friendly version')) {
-          $book_links['book_printer'] = array(
+          $book_links['book_printer'] = [
             'title' => t('Printer-friendly version'),
             'url' => Url::fromRoute('book.export', [
               'type' => 'html',
               'node' => $node->id(),
             ]),
-            'attributes' => array('title' => t('Show a printer-friendly version of this book page and its sub-pages.'))
-          );
+            'attributes' => ['title' => t('Show a printer-friendly version of this book page and its sub-pages.')]
+          ];
         }
       }
     }
 
     if (!empty($book_links)) {
-      $links['book'] = array(
+      $links['book'] = [
         '#theme' => 'links__node__book',
         '#links' => $book_links,
-        '#attributes' => array('class' => array('links', 'inline')),
-      );
+        '#attributes' => ['class' => ['links', 'inline']],
+      ];
     }
   }
 }
@@ -148,17 +148,17 @@ function book_form_node_form_alter(&$form, FormStateInterface $form_state, $form
     $collapsed = !($node->isNew() && !empty($node->book['pid']));
     $form = \Drupal::service('book.manager')->addFormElements($form, $form_state, $node, $account, $collapsed);
     // The "js-hide" class hides submit button when Javascript is enabled.
-    $form['book']['pick-book'] = array(
+    $form['book']['pick-book'] = [
       '#type' => 'submit',
       '#value' => t('Change book (update list of parents)'),
-      '#submit' => array('book_pick_book_nojs_submit'),
+      '#submit' => ['book_pick_book_nojs_submit'],
       '#weight' => 20,
-      '#attributes' => array(
-        'class' => array(
+      '#attributes' => [
+        'class' => [
           'js-hide',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     $form['#entity_builders'][] = 'book_node_builder';
   }
 }
@@ -232,7 +232,7 @@ function book_node_view(array &$build, EntityInterface $node, EntityViewDisplayI
       if (!$book_node->access()) {
         return;
       }
-      $build['book_navigation'] = array(
+      $build['book_navigation'] = [
         '#theme' => 'book_navigation',
         '#book_link' => $node->book,
         '#weight' => 100,
@@ -241,7 +241,7 @@ function book_node_view(array &$build, EntityInterface $node, EntityViewDisplayI
         '#cache' => [
           'tags' => $node->getEntityType()->getListCacheTags(),
         ],
-      );
+      ];
     }
   }
 }
@@ -295,7 +295,7 @@ function book_node_prepare_form(NodeInterface $node, $operation, FormStateInterf
   // Prepare defaults for the add/edit form.
   $account = \Drupal::currentUser();
   if (empty($node->book) && ($account->hasPermission('add content to books') || $account->hasPermission('administer book outlines'))) {
-    $node->book = array();
+    $node->book = [];
 
     $query = \Drupal::request()->query;
     if ($node->isNew() && !is_null($query->get('parent')) && is_numeric($query->get('parent'))) {
@@ -341,10 +341,10 @@ function book_form_node_confirm_form_alter(&$form, FormStateInterface $form_stat
   }
 
   if (isset($node->book) && $node->book['has_children']) {
-    $form['book_warning'] = array(
-      '#markup' => '<p>' . t('%title is part of a book outline, and has associated child pages. If you proceed with deletion, the child pages will be relocated automatically.', array('%title' => $node->label())) . '</p>',
+    $form['book_warning'] = [
+      '#markup' => '<p>' . t('%title is part of a book outline, and has associated child pages. If you proceed with deletion, the child pages will be relocated automatically.', ['%title' => $node->label()]) . '</p>',
       '#weight' => -10,
-    );
+    ];
   }
 }
 
@@ -365,13 +365,13 @@ function book_form_node_confirm_form_alter(&$form, FormStateInterface $form_stat
 function template_preprocess_book_all_books_block(&$variables) {
   // Remove all non-renderable elements.
   $elements = $variables['book_menus'];
-  $variables['book_menus'] = array();
+  $variables['book_menus'] = [];
   foreach (Element::children($elements) as $index) {
-    $variables['book_menus'][] = array(
+    $variables['book_menus'][] = [
       'id' => $index,
       'menu' => $elements[$index],
       'title' => $elements[$index]['#book_title'],
-    );
+    ];
   }
 }
 
@@ -391,7 +391,7 @@ function template_preprocess_book_navigation(&$variables) {
   // Provide extra variables for themers. Not needed by default.
   $variables['book_id'] = $book_link['bid'];
   $variables['book_title'] = $book_link['link_title'];
-  $variables['book_url'] = \Drupal::url('entity.node.canonical', array('node' => $book_link['bid']));
+  $variables['book_url'] = \Drupal::url('entity.node.canonical', ['node' => $book_link['bid']]);
   $variables['current_depth'] = $book_link['depth'];
   $variables['tree'] = '';
 
@@ -401,14 +401,14 @@ function template_preprocess_book_navigation(&$variables) {
   if ($book_link['nid']) {
     $variables['tree'] = $book_outline->childrenLinks($book_link);
 
-    $build = array();
+    $build = [];
 
     if ($prev = $book_outline->prevLink($book_link)) {
-      $prev_href = \Drupal::url('entity.node.canonical', array('node' => $prev['nid']));
-      $build['#attached']['html_head_link'][][] = array(
+      $prev_href = \Drupal::url('entity.node.canonical', ['node' => $prev['nid']]);
+      $build['#attached']['html_head_link'][][] = [
         'rel' => 'prev',
         'href' => $prev_href,
-      );
+      ];
       $variables['prev_url'] = $prev_href;
       $variables['prev_title'] = $prev['title'];
     }
@@ -416,21 +416,21 @@ function template_preprocess_book_navigation(&$variables) {
     /** @var \Drupal\book\BookManagerInterface $book_manager */
     $book_manager = \Drupal::service('book.manager');
     if ($book_link['pid'] && $parent = $book_manager->loadBookLink($book_link['pid'])) {
-      $parent_href = \Drupal::url('entity.node.canonical', array('node' => $book_link['pid']));
-      $build['#attached']['html_head_link'][][] = array(
+      $parent_href = \Drupal::url('entity.node.canonical', ['node' => $book_link['pid']]);
+      $build['#attached']['html_head_link'][][] = [
         'rel' => 'up',
         'href' => $parent_href,
-      );
+      ];
       $variables['parent_url'] = $parent_href;
       $variables['parent_title'] = $parent['title'];
     }
 
     if ($next = $book_outline->nextLink($book_link)) {
-      $next_href = \Drupal::url('entity.node.canonical', array('node' => $next['nid']));
-      $build['#attached']['html_head_link'][][] = array(
+      $next_href = \Drupal::url('entity.node.canonical', ['node' => $next['nid']]);
+      $build['#attached']['html_head_link'][][] = [
         'rel' => 'next',
         'href' => $next_href,
-      );
+      ];
       $variables['next_url'] = $next_href;
       $variables['next_title'] = $next['title'];
     }
@@ -442,7 +442,7 @@ function template_preprocess_book_navigation(&$variables) {
 
   $variables['has_links'] = FALSE;
   // Link variables to filter for values and set state of the flag variable.
-  $links = array('prev_url', 'prev_title', 'parent_url', 'parent_title', 'next_url', 'next_title');
+  $links = ['prev_url', 'prev_title', 'parent_url', 'parent_title', 'next_url', 'next_title'];
   foreach ($links as $link) {
     if (isset($variables[$link])) {
       // Flag when there is a value.
@@ -475,7 +475,7 @@ function template_preprocess_book_export_html(&$variables) {
   $variables['language_rtl'] = ($language_interface->getDirection() == LanguageInterface::DIRECTION_RTL);
 
   // HTML element attributes.
-  $attributes = array();
+  $attributes = [];
   $attributes['lang'] = $language_interface->getId();
   $attributes['dir'] = $language_interface->getDirection();
   $variables['html_attributes'] = new Attribute($attributes);
diff --git a/core/modules/book/src/BookBreadcrumbBuilder.php b/core/modules/book/src/BookBreadcrumbBuilder.php
index ed39a53d2e1195aa3cddedaa31680c655016b6b1..90591d8d49b3803640067e9a25bb1211d9cdfde8 100644
--- a/core/modules/book/src/BookBreadcrumbBuilder.php
+++ b/core/modules/book/src/BookBreadcrumbBuilder.php
@@ -56,10 +56,10 @@ public function applies(RouteMatchInterface $route_match) {
    * {@inheritdoc}
    */
   public function build(RouteMatchInterface $route_match) {
-    $book_nids = array();
+    $book_nids = [];
     $breadcrumb = new Breadcrumb();
 
-    $links = array(Link::createFromRoute($this->t('Home'), '<front>'));
+    $links = [Link::createFromRoute($this->t('Home'), '<front>')];
     $book = $route_match->getParameter('node')->book;
     $depth = 1;
     // We skip the current node.
@@ -76,7 +76,7 @@ public function build(RouteMatchInterface $route_match) {
           $breadcrumb->addCacheableDependency($access);
           if ($access->isAllowed()) {
             $breadcrumb->addCacheableDependency($parent_book);
-            $links[] = Link::createFromRoute($parent_book->label(), 'entity.node.canonical', array('node' => $parent_book->id()));
+            $links[] = Link::createFromRoute($parent_book->label(), 'entity.node.canonical', ['node' => $parent_book->id()]);
           }
         }
         $depth++;
diff --git a/core/modules/book/src/BookExport.php b/core/modules/book/src/BookExport.php
index 8261c42ea922cef6b77a3bd2ae9fb3fbc45ebf87..a3233700510609a275849d4cccf9948038053f74 100644
--- a/core/modules/book/src/BookExport.php
+++ b/core/modules/book/src/BookExport.php
@@ -73,8 +73,8 @@ public function bookExportHtml(NodeInterface $node) {
     }
 
     $tree = $this->bookManager->bookSubtreeData($node->book);
-    $contents = $this->exportTraverse($tree, array($this, 'bookNodeExport'));
-    return array(
+    $contents = $this->exportTraverse($tree, [$this, 'bookNodeExport']);
+    return [
       '#theme' => 'book_export_html',
       '#title' => $node->label(),
       '#contents' => $contents,
@@ -82,7 +82,7 @@ public function bookExportHtml(NodeInterface $node) {
       '#cache' => [
         'tags' => $node->getEntityType()->getListCacheTags(),
       ],
-    );
+    ];
   }
 
   /**
@@ -101,9 +101,9 @@ public function bookExportHtml(NodeInterface $node) {
    */
   protected function exportTraverse(array $tree, $callable) {
     // If there is no valid callable, use the default callback.
-    $callable = !empty($callable) ? $callable : array($this, 'bookNodeExport');
+    $callable = !empty($callable) ? $callable : [$this, 'bookNodeExport'];
 
-    $build = array();
+    $build = [];
     foreach ($tree as $data) {
       // Note- access checking is already performed when building the tree.
       if ($node = $this->nodeStorage->load($data['link']['nid'])) {
@@ -133,12 +133,12 @@ protected function bookNodeExport(NodeInterface $node, $children = '') {
     $build = $this->viewBuilder->view($node, 'print', NULL);
     unset($build['#theme']);
 
-    return array(
+    return [
       '#theme' => 'book_node_export_html',
       '#content' => $build,
       '#node' => $node,
       '#children' => $children,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/book/src/BookManager.php b/core/modules/book/src/BookManager.php
index 60754be7bd1737f872fc433764c0538d2ef94f7b..3e14c400767e267b50712d11e77b4361889445ef 100644
--- a/core/modules/book/src/BookManager.php
+++ b/core/modules/book/src/BookManager.php
@@ -92,7 +92,7 @@ public function getAllBooks() {
    * Loads Books Array.
    */
   protected function loadBooks() {
-    $this->books = array();
+    $this->books = [];
     $nids = $this->bookOutlineStorage->getBooks();
 
     if ($nids) {
@@ -117,15 +117,15 @@ protected function loadBooks() {
    * {@inheritdoc}
    */
   public function getLinkDefaults($nid) {
-    return array(
+    return [
       'original_bid' => 0,
       'nid' => $nid,
       'bid' => 0,
       'pid' => 0,
       'has_children' => 0,
       'weight' => 0,
-      'options' => array(),
-    );
+      'options' => [],
+    ];
   }
 
   /**
@@ -159,40 +159,40 @@ public function addFormElements(array $form, FormStateInterface $form_state, Nod
     if ($form_state->hasValue('book')) {
       $node->book = $form_state->getValue('book');
     }
-    $form['book'] = array(
+    $form['book'] = [
       '#type' => 'details',
       '#title' => $this->t('Book outline'),
       '#weight' => 10,
       '#open' => !$collapsed,
       '#group' => 'advanced',
-      '#attributes' => array(
-        'class' => array('book-outline-form'),
-      ),
-      '#attached' => array(
-        'library' => array('book/drupal.book'),
-      ),
+      '#attributes' => [
+        'class' => ['book-outline-form'],
+      ],
+      '#attached' => [
+        'library' => ['book/drupal.book'],
+      ],
       '#tree' => TRUE,
-    );
-    foreach (array('nid', 'has_children', 'original_bid', 'parent_depth_limit') as $key) {
-      $form['book'][$key] = array(
+    ];
+    foreach (['nid', 'has_children', 'original_bid', 'parent_depth_limit'] as $key) {
+      $form['book'][$key] = [
         '#type' => 'value',
         '#value' => $node->book[$key],
-      );
+      ];
     }
 
     $form['book']['pid'] = $this->addParentSelectFormElements($node->book);
 
     // @see \Drupal\book\Form\BookAdminEditForm::bookAdminTableTree(). The
     // weight may be larger than 15.
-    $form['book']['weight'] = array(
+    $form['book']['weight'] = [
       '#type' => 'weight',
       '#title' => $this->t('Weight'),
       '#default_value' => $node->book['weight'],
       '#delta' => max(15, abs($node->book['weight'])),
       '#weight' => 5,
       '#description' => $this->t('Pages at a given level are ordered first by weight and then by title.'),
-    );
-    $options = array();
+    ];
+    $options = [];
     $nid = !$node->isNew() ? $node->id() : 'new';
     if ($node->id() && ($nid == $node->book['original_bid']) && ($node->book['parent_depth_limit'] == 0)) {
       // This is the top level node in a maximum depth book and thus cannot be
@@ -207,15 +207,15 @@ public function addFormElements(array $form, FormStateInterface $form_state, Nod
 
     if ($account->hasPermission('create new books') && ($nid == 'new' || ($nid != $node->book['original_bid']))) {
       // The node can become a new book, if it is not one already.
-      $options = array($nid => $this->t('- Create a new book -')) + $options;
+      $options = [$nid => $this->t('- Create a new book -')] + $options;
     }
     if (!$node->book['bid']) {
       // The node is not currently in the hierarchy.
-      $options = array(0 => $this->t('- None -')) + $options;
+      $options = [0 => $this->t('- None -')] + $options;
     }
 
     // Add a drop-down to select the destination book.
-    $form['book']['bid'] = array(
+    $form['book']['bid'] = [
       '#type' => 'select',
       '#title' => $this->t('Book'),
       '#default_value' => $node->book['bid'],
@@ -223,14 +223,14 @@ public function addFormElements(array $form, FormStateInterface $form_state, Nod
       '#access' => (bool) $options,
       '#description' => $this->t('Your page will be a part of the selected book.'),
       '#weight' => -5,
-      '#attributes' => array('class' => array('book-title-select')),
-      '#ajax' => array(
+      '#attributes' => ['class' => ['book-title-select']],
+      '#ajax' => [
         'callback' => 'book_form_update',
         'wrapper' => 'edit-book-plid-wrapper',
         'effect' => 'fade',
         'speed' => 'fast',
-      ),
-    );
+      ],
+    ];
     return $form;
   }
 
@@ -281,8 +281,8 @@ public function updateOutline(NodeInterface $node) {
   /**
    * {@inheritdoc}
    */
-  public function getBookParents(array $item, array $parent = array()) {
-    $book = array();
+  public function getBookParents(array $item, array $parent = []) {
+    $book = [];
     if ($item['pid'] == 0) {
       $book['p1'] = $item['nid'];
       for ($i = 2; $i <= static::BOOK_MAX_DEPTH; $i++) {
@@ -325,15 +325,15 @@ public function getBookParents(array $item, array $parent = array()) {
   protected function addParentSelectFormElements(array $book_link) {
     $config = $this->configFactory->get('book.settings');
     if ($config->get('override_parent_selector')) {
-      return array();
+      return [];
     }
     // Offer a message or a drop-down to choose a different parent page.
-    $form = array(
+    $form = [
       '#type' => 'hidden',
       '#value' => -1,
       '#prefix' => '<div id="edit-book-plid-wrapper">',
       '#suffix' => '</div>',
-    );
+    ];
 
     if ($book_link['nid'] === $book_link['bid']) {
       // This is a book - at the top level.
@@ -348,16 +348,16 @@ protected function addParentSelectFormElements(array $book_link) {
       $form['#prefix'] .= '<em>' . $this->t('No book selected.') . '</em>';
     }
     else {
-      $form = array(
+      $form = [
         '#type' => 'select',
         '#title' => $this->t('Parent item'),
         '#default_value' => $book_link['pid'],
-        '#description' => $this->t('The parent page in the book. The maximum depth for a book and all child pages is @maxdepth. Some pages in the selected book may not be available as parents if selecting them would exceed this limit.', array('@maxdepth' => static::BOOK_MAX_DEPTH)),
-        '#options' => $this->getTableOfContents($book_link['bid'], $book_link['parent_depth_limit'], array($book_link['nid'])),
-        '#attributes' => array('class' => array('book-title-select')),
+        '#description' => $this->t('The parent page in the book. The maximum depth for a book and all child pages is @maxdepth. Some pages in the selected book may not be available as parents if selecting them would exceed this limit.', ['@maxdepth' => static::BOOK_MAX_DEPTH]),
+        '#options' => $this->getTableOfContents($book_link['bid'], $book_link['parent_depth_limit'], [$book_link['nid']]),
+        '#attributes' => ['class' => ['book-title-select']],
         '#prefix' => '<div id="edit-book-plid-wrapper">',
         '#suffix' => '</div>',
-      );
+      ];
     }
     $this->renderer->addCacheableDependency($form, $config);
 
@@ -388,7 +388,7 @@ protected function addParentSelectFormElements(array $book_link) {
    *   children).
    */
   protected function recurseTableOfContents(array $tree, $indent, array &$toc, array $exclude, $depth_limit) {
-    $nids = array();
+    $nids = [];
     foreach ($tree as $data) {
       if ($data['link']['depth'] > $depth_limit) {
         // Don't iterate through any links on this level.
@@ -417,9 +417,9 @@ protected function recurseTableOfContents(array $tree, $indent, array &$toc, arr
   /**
    * {@inheritdoc}
    */
-  public function getTableOfContents($bid, $depth_limit, array $exclude = array()) {
+  public function getTableOfContents($bid, $depth_limit, array $exclude = []) {
     $tree = $this->bookTreeAllData($bid);
-    $toc = array();
+    $toc = [];
     $this->recurseTableOfContents($tree, '', $toc, $exclude, $depth_limit);
 
     return $toc;
@@ -443,14 +443,14 @@ public function deleteFromBook($nid) {
     }
     $this->updateOriginalParent($original);
     $this->books = NULL;
-    Cache::invalidateTags(array('bid:' . $original['bid']));
+    Cache::invalidateTags(['bid:' . $original['bid']]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function bookTreeAllData($bid, $link = NULL, $max_depth = NULL) {
-    $tree = &drupal_static(__METHOD__, array());
+    $tree = &drupal_static(__METHOD__, []);
     $language_interface = \Drupal::languageManager()->getCurrentLanguage();
 
     // Use $nid as a flag for whether the data being loaded is for the whole
@@ -462,10 +462,10 @@ public function bookTreeAllData($bid, $link = NULL, $max_depth = NULL) {
 
     if (!isset($tree[$cid])) {
       // If the tree data was not in the static cache, build $tree_parameters.
-      $tree_parameters = array(
+      $tree_parameters = [
         'min_depth' => 1,
         'max_depth' => $max_depth,
-      );
+      ];
       if ($nid) {
         $active_trail = $this->getActiveTrailIds($bid, $link);
         $tree_parameters['expanded'] = $active_trail;
@@ -486,7 +486,7 @@ public function bookTreeAllData($bid, $link = NULL, $max_depth = NULL) {
   public function getActiveTrailIds($bid, $link) {
     // The tree is for a single item, so we need to match the values in its
     // p columns and 0 (the top level) with the plid values of other links.
-    $active_trail = array(0);
+    $active_trail = [0];
     for ($i = 1; $i < static::BOOK_MAX_DEPTH; $i++) {
       if (!empty($link["p$i"])) {
         $active_trail[] = $link["p$i"];
@@ -600,7 +600,7 @@ protected function buildItems(array $tree) {
    * @return array
    *   A fully built book tree.
    */
-  protected function bookTreeBuild($bid, array $parameters = array()) {
+  protected function bookTreeBuild($bid, array $parameters = []) {
     // Build the book tree.
     $data = $this->doBookTreeBuild($bid, $parameters);
     // Check access for the current user to each item in the tree.
@@ -639,9 +639,9 @@ protected function bookTreeBuild($bid, array $parameters = array()) {
    *
    * @see \Drupal\book\BookOutlineStorageInterface::getBookMenuTree()
    */
-  protected function doBookTreeBuild($bid, array $parameters = array()) {
+  protected function doBookTreeBuild($bid, array $parameters = []) {
     // Static cache of already built menu trees.
-    $trees = &drupal_static(__METHOD__, array());
+    $trees = &drupal_static(__METHOD__, []);
     $language_interface = \Drupal::languageManager()->getCurrentLanguage();
 
     // Build the cache id; sort parents to prevent duplicate storage and remove
@@ -664,18 +664,18 @@ protected function doBookTreeBuild($bid, array $parameters = array()) {
       $result = $this->bookOutlineStorage->getBookMenuTree($bid, $parameters, $min_depth, static::BOOK_MAX_DEPTH);
 
       // Build an ordered array of links using the query result object.
-      $links = array();
+      $links = [];
       foreach ($result as $link) {
         $link = (array) $link;
         $links[$link['nid']] = $link;
       }
-      $active_trail = (isset($parameters['active_trail']) ? $parameters['active_trail'] : array());
+      $active_trail = (isset($parameters['active_trail']) ? $parameters['active_trail'] : []);
       $data['tree'] = $this->buildBookOutlineData($links, $active_trail, $min_depth);
-      $data['node_links'] = array();
+      $data['node_links'] = [];
       $this->bookTreeCollectNodeLinks($data['tree'], $data['node_links']);
 
       // Cache the data, if it is not already in the cache.
-      \Drupal::cache('data')->set($tree_cid, $data, Cache::PERMANENT, array('bid:' . $bid));
+      \Drupal::cache('data')->set($tree_cid, $data, Cache::PERMANENT, ['bid:' . $bid]);
       $trees[$tree_cid] = $data;
     }
 
@@ -705,7 +705,7 @@ public function bookTreeGetFlat(array $book_link) {
     if (!isset($this->bookTreeFlattened[$book_link['nid']])) {
       // Call $this->bookTreeAllData() to take advantage of caching.
       $tree = $this->bookTreeAllData($book_link['bid'], $book_link, $book_link['depth'] + 1);
-      $this->bookTreeFlattened[$book_link['nid']] = array();
+      $this->bookTreeFlattened[$book_link['nid']] = [];
       $this->flatBookTree($tree, $this->bookTreeFlattened[$book_link['nid']]);
     }
 
@@ -735,7 +735,7 @@ protected function flatBookTree(array $tree, array &$flat) {
    * {@inheritdoc}
    */
   public function loadBookLink($nid, $translate = TRUE) {
-    $links = $this->loadBookLinks(array($nid), $translate);
+    $links = $this->loadBookLinks([$nid], $translate);
     return isset($links[$nid]) ? $links[$nid] : FALSE;
   }
 
@@ -744,7 +744,7 @@ public function loadBookLink($nid, $translate = TRUE) {
    */
   public function loadBookLinks($nids, $translate = TRUE) {
     $result = $this->bookOutlineStorage->loadMultiple($nids, $translate);
-    $links = array();
+    $links = [];
     foreach ($result as $link) {
       if ($translate) {
         $this->bookLinkTranslate($link);
@@ -779,7 +779,7 @@ public function saveBookLink(array $link, $new) {
         // Update the bid for this page and all children.
         if ($link['pid'] == 0) {
           $link['depth'] = 1;
-          $parent = array();
+          $parent = [];
         }
         // In case the form did not specify a proper PID we use the BID as new
         // parent.
@@ -801,11 +801,11 @@ public function saveBookLink(array $link, $new) {
         $this->updateParent($link);
       }
       // Update the weight and pid.
-      $this->bookOutlineStorage->update($link['nid'], array(
+      $this->bookOutlineStorage->update($link['nid'], [
         'weight' => $link['weight'],
         'pid' => $link['pid'],
         'bid' => $link['bid'],
-      ));
+      ]);
     }
     $cache_tags = [];
     foreach ($affected_bids as $bid) {
@@ -825,16 +825,16 @@ public function saveBookLink(array $link, $new) {
    */
   protected function moveChildren(array $link, array $original) {
     $p = 'p1';
-    $expressions = array();
+    $expressions = [];
     for ($i = 1; $i <= $link['depth']; $p = 'p' . ++$i) {
-      $expressions[] = array($p, ":p_$i", array(":p_$i" => $link[$p]));
+      $expressions[] = [$p, ":p_$i", [":p_$i" => $link[$p]]];
     }
     $j = $original['depth'] + 1;
     while ($i <= static::BOOK_MAX_DEPTH && $j <= static::BOOK_MAX_DEPTH) {
-      $expressions[] = array('p' . $i++, 'p' . $j++, array());
+      $expressions[] = ['p' . $i++, 'p' . $j++, []];
     }
     while ($i <= static::BOOK_MAX_DEPTH) {
-      $expressions[] = array('p' . $i++, 0, array());
+      $expressions[] = ['p' . $i++, 0, []];
     }
 
     $shift = $link['depth'] - $original['depth'];
@@ -868,7 +868,7 @@ protected function updateParent(array $link) {
       // Nothing to update.
       return TRUE;
     }
-    return $this->bookOutlineStorage->update($link['pid'], array('has_children' => 1));
+    return $this->bookOutlineStorage->update($link['pid'], ['has_children' => 1]);
   }
 
   /**
@@ -897,7 +897,7 @@ protected function updateOriginalParent(array $original) {
     // Update the parent. If the original link did not have children, then the
     // parent now does not have children. If the original had children, then the
     // the parent has children now (still).
-    return $this->bookOutlineStorage->update($original['pid'], array('has_children' => $parent_has_children));
+    return $this->bookOutlineStorage->update($original['pid'], ['has_children' => $parent_has_children]);
   }
 
   /**
@@ -926,7 +926,7 @@ protected function setParents(array &$link, array $parent) {
   /**
    * {@inheritdoc}
    */
-  public function bookTreeCheckAccess(&$tree, $node_links = array()) {
+  public function bookTreeCheckAccess(&$tree, $node_links = []) {
     if ($node_links) {
       // @todo Extract that into its own method.
       $nids = array_keys($node_links);
@@ -954,7 +954,7 @@ public function bookTreeCheckAccess(&$tree, $node_links = array()) {
    *   The book tree to operate on.
    */
   protected function doBookTreeCheckAccess(&$tree) {
-    $new_tree = array();
+    $new_tree = [];
     foreach ($tree as $key => $v) {
       $item = &$tree[$key]['link'];
       $this->bookLinkTranslate($item);
@@ -993,7 +993,7 @@ public function bookLinkTranslate(&$link) {
       }
       // The node label will be the value for the current user's language.
       $link['title'] = $node->label();
-      $link['options'] = array();
+      $link['options'] = [];
     }
     return $link;
   }
@@ -1021,7 +1021,7 @@ public function bookLinkTranslate(&$link) {
    *     array will be empty if the book link has no items in its sub-tree
    *     having a depth greater than or equal to $depth.
    */
-  protected function buildBookOutlineData(array $links, array $parents = array(), $depth = 1) {
+  protected function buildBookOutlineData(array $links, array $parents = [], $depth = 1) {
     // Reverse the array so we can use the more efficient array_pop() function.
     $links = array_reverse($links);
     return $this->buildBookOutlineRecursive($links, $parents, $depth);
@@ -1047,16 +1047,16 @@ protected function buildBookOutlineData(array $links, array $parents = array(),
    *   Book tree.
    */
   protected function buildBookOutlineRecursive(&$links, $parents, $depth) {
-    $tree = array();
+    $tree = [];
     while ($item = array_pop($links)) {
       // We need to determine if we're on the path to root so we can later build
       // the correct active trail.
       $item['in_active_trail'] = in_array($item['nid'], $parents);
       // Add the current link to the tree.
-      $tree[$item['nid']] = array(
+      $tree[$item['nid']] = [
         'link' => $item,
-        'below' => array(),
-      );
+        'below' => [],
+      ];
       // Look ahead to the next link, but leave it on the array so it's
       // available to other recursive function calls if we return or build a
       // sub-tree.
@@ -1080,7 +1080,7 @@ protected function buildBookOutlineRecursive(&$links, $parents, $depth) {
    * {@inheritdoc}
    */
   public function bookSubtreeData($link) {
-    $tree = &drupal_static(__METHOD__, array());
+    $tree = &drupal_static(__METHOD__, []);
 
     // Generate a cache ID (cid) specific for this $link.
     $cid = 'book-links:subtree-cid:' . $link['nid'];
@@ -1101,23 +1101,23 @@ public function bookSubtreeData($link) {
       // If the subtree data was not in the cache, $data will be NULL.
       if (!isset($data)) {
         $result = $this->bookOutlineStorage->getBookSubtree($link, static::BOOK_MAX_DEPTH);
-        $links = array();
+        $links = [];
         foreach ($result as $item) {
           $links[] = $item;
         }
-        $data['tree'] = $this->buildBookOutlineData($links, array(), $link['depth']);
-        $data['node_links'] = array();
+        $data['tree'] = $this->buildBookOutlineData($links, [], $link['depth']);
+        $data['node_links'] = [];
         $this->bookTreeCollectNodeLinks($data['tree'], $data['node_links']);
         // Compute the real cid for book subtree data.
         $tree_cid = 'book-links:subtree-data:' . hash('sha256', serialize($data));
         // Cache the data, if it is not already in the cache.
 
         if (!\Drupal::cache('data')->get($tree_cid)) {
-          \Drupal::cache('data')->set($tree_cid, $data, Cache::PERMANENT, array('bid:' . $link['bid']));
+          \Drupal::cache('data')->set($tree_cid, $data, Cache::PERMANENT, ['bid:' . $link['bid']]);
         }
         // Cache the cid of the (shared) data using the book and item-specific
         // cid.
-        \Drupal::cache('data')->set($cid, $tree_cid, Cache::PERMANENT, array('bid:' . $link['bid']));
+        \Drupal::cache('data')->set($cid, $tree_cid, Cache::PERMANENT, ['bid:' . $link['bid']]);
       }
       // Check access for the current user to each item in the tree.
       $this->bookTreeCheckAccess($data['tree'], $data['node_links']);
diff --git a/core/modules/book/src/BookManagerInterface.php b/core/modules/book/src/BookManagerInterface.php
index 70d0107c639b80e0e985e4f76dd1df4790af1835..5402bf51d7e108e3f298d90ed2a6df6a72345bae 100644
--- a/core/modules/book/src/BookManagerInterface.php
+++ b/core/modules/book/src/BookManagerInterface.php
@@ -108,7 +108,7 @@ public function loadBookLinks($nids, $translate = TRUE);
    *   An array of (menu link ID, title) pairs for use as options for selecting
    *   a book page.
    */
-  public function getTableOfContents($bid, $depth_limit, array $exclude = array());
+  public function getTableOfContents($bid, $depth_limit, array $exclude = []);
 
   /**
    * Finds the depth limit for items in the parent select.
@@ -207,7 +207,7 @@ public function saveBookLink(array $link, $new);
    */
   public function getLinkDefaults($nid);
 
-  public function getBookParents(array $item, array $parent = array());
+  public function getBookParents(array $item, array $parent = []);
 
   /**
    * Builds the common elements of the book form for the node and outline forms.
@@ -262,7 +262,7 @@ public function bookTreeOutput(array $tree);
    *   A collection of node link references generated from $tree by
    *   menu_tree_collect_node_links().
    */
-  public function bookTreeCheckAccess(&$tree, $node_links = array());
+  public function bookTreeCheckAccess(&$tree, $node_links = []);
 
   /**
    * Gets the data representing a subtree of the book hierarchy.
diff --git a/core/modules/book/src/BookOutline.php b/core/modules/book/src/BookOutline.php
index bc03b7c5a96cceca6d3b8d00ab81fc6626a2b3fe..ec28d50c72012ffd40dc7cc224f5d92ec91d1e40 100644
--- a/core/modules/book/src/BookOutline.php
+++ b/core/modules/book/src/BookOutline.php
@@ -105,7 +105,7 @@ public function nextLink(array $book_link) {
   public function childrenLinks(array $book_link) {
     $flat = $this->bookManager->bookTreeGetFlat($book_link);
 
-    $children = array();
+    $children = [];
 
     if ($book_link['has_children']) {
       // Walk through the array until we find the current page.
diff --git a/core/modules/book/src/BookOutlineStorage.php b/core/modules/book/src/BookOutlineStorage.php
index 92076cba3f68385701dc6073159d606f8182d37d..4f61b5c0054766c94718dcc7550437bd088364ad 100644
--- a/core/modules/book/src/BookOutlineStorage.php
+++ b/core/modules/book/src/BookOutlineStorage.php
@@ -43,7 +43,7 @@ public function hasBooks() {
    * {@inheritdoc}
    */
   public function loadMultiple($nids, $access = TRUE) {
-    $query = $this->connection->select('book', 'b', array('fetch' => \PDO::FETCH_ASSOC));
+    $query = $this->connection->select('book', 'b', ['fetch' => \PDO::FETCH_ASSOC]);
     $query->fields('b');
     $query->condition('b.nid', $nids, 'IN');
 
@@ -89,7 +89,7 @@ public function delete($nid) {
    */
   public function loadBookChildren($pid) {
     return $this->connection
-      ->query("SELECT * FROM {book} WHERE pid = :pid", array(':pid' => $pid))
+      ->query("SELECT * FROM {book} WHERE pid = :pid", [':pid' => $pid])
       ->fetchAllAssoc('nid', \PDO::FETCH_ASSOC);
   }
 
@@ -128,12 +128,12 @@ public function getBookMenuTree($bid, $parameters, $min_depth, $max_depth) {
   public function insert($link, $parents) {
     return $this->connection
       ->insert('book')
-      ->fields(array(
+      ->fields([
         'nid' => $link['nid'],
         'bid' => $link['bid'],
         'pid' => $link['pid'],
         'weight' => $link['weight'],
-        ) + $parents
+        ] + $parents
       )
       ->execute();
   }
@@ -154,13 +154,13 @@ public function update($nid, $fields) {
    */
   public function updateMovedChildren($bid, $original, $expressions, $shift) {
     $query = $this->connection->update('book');
-    $query->fields(array('bid' => $bid));
+    $query->fields(['bid' => $bid]);
 
     foreach ($expressions as $expression) {
       $query->expression($expression[0], $expression[1], $expression[2]);
     }
 
-    $query->expression('depth', 'depth + :depth', array(':depth' => $shift));
+    $query->expression('depth', 'depth + :depth', [':depth' => $shift]);
     $query->condition('bid', $original['bid']);
     $p = 'p1';
     for ($i = 1; !empty($original[$p]); $p = 'p' . ++$i) {
@@ -186,7 +186,7 @@ public function countOriginalLinkChildren($original) {
    * {@inheritdoc}
    */
   public function getBookSubtree($link, $max_depth) {
-    $query = db_select('book', 'b', array('fetch' => \PDO::FETCH_ASSOC));
+    $query = db_select('book', 'b', ['fetch' => \PDO::FETCH_ASSOC]);
     $query->fields('b');
     $query->condition('b.bid', $link['bid']);
 
diff --git a/core/modules/book/src/Controller/BookController.php b/core/modules/book/src/Controller/BookController.php
index 920afeb2b1fce69fd1d3e23595536307f55f4005..b92c3e3fcfeb7904f4ce9afcf7e3576055686a47 100644
--- a/core/modules/book/src/Controller/BookController.php
+++ b/core/modules/book/src/Controller/BookController.php
@@ -73,9 +73,9 @@ public static function create(ContainerInterface $container) {
    *   A render array representing the administrative page content.
    */
   public function adminOverview() {
-    $rows = array();
+    $rows = [];
 
-    $headers = array(t('Book'), t('Operations'));
+    $headers = [t('Book'), t('Operations')];
     // Add any recognized books to the table list.
     foreach ($this->bookManager->getAllBooks() as $book) {
       /** @var \Drupal\Core\Url $url */
@@ -83,28 +83,28 @@ public function adminOverview() {
       if (isset($book['options'])) {
         $url->setOptions($book['options']);
       }
-      $row = array(
+      $row = [
         $this->l($book['title'], $url),
-      );
-      $links = array();
-      $links['edit'] = array(
+      ];
+      $links = [];
+      $links['edit'] = [
         'title' => t('Edit order and titles'),
         'url' => Url::fromRoute('book.admin_edit', ['node' => $book['nid']]),
-      );
-      $row[] = array(
-        'data' => array(
+      ];
+      $row[] = [
+        'data' => [
           '#type' => 'operations',
           '#links' => $links,
-        ),
-      );
+        ],
+      ];
       $rows[] = $row;
     }
-    return array(
+    return [
       '#type' => 'table',
       '#header' => $headers,
       '#rows' => $rows,
       '#empty' => t('No books available.'),
-    );
+    ];
   }
 
   /**
@@ -114,17 +114,17 @@ public function adminOverview() {
    *   A render array representing the listing of all books content.
    */
   public function bookRender() {
-    $book_list = array();
+    $book_list = [];
     foreach ($this->bookManager->getAllBooks() as $book) {
       $book_list[] = $this->l($book['title'], $book['url']);
     }
-    return array(
+    return [
       '#theme' => 'item_list',
       '#items' => $book_list,
       '#cache' => [
         'tags' => \Drupal::entityManager()->getDefinition('node')->getListCacheTags(),
       ],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/book/src/Form/BookAdminEditForm.php b/core/modules/book/src/Form/BookAdminEditForm.php
index 175394422f2fcdc6e6b254c9f91d9030744c6c4b..e91f52ea8b2576b018c4cfca010d45041b9a2e7e 100644
--- a/core/modules/book/src/Form/BookAdminEditForm.php
+++ b/core/modules/book/src/Form/BookAdminEditForm.php
@@ -70,10 +70,10 @@ public function buildForm(array $form, FormStateInterface $form_state, NodeInter
     $form['#title'] = $node->label();
     $form['#node'] = $node;
     $this->bookAdminTable($node, $form);
-    $form['save'] = array(
+    $form['save'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save book pages'),
-    );
+    ];
 
     return $form;
   }
@@ -101,7 +101,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       foreach (Element::children($form['table']) as $key) {
         if ($form['table'][$key]['#item']) {
           $row = $form['table'][$key];
-          $values = $form_state->getValue(array('table', $key));
+          $values = $form_state->getValue(['table', $key]);
 
           // Update menu item if moved.
           if ($row['parent']['pid']['#default_value'] != $values['pid'] || $row['weight']['#default_value'] != $values['weight']) {
@@ -114,18 +114,18 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
           // Update the title if changed.
           if ($row['title']['#default_value'] != $values['title']) {
             $node = $this->nodeStorage->load($values['nid']);
-            $node->revision_log = $this->t('Title changed from %original to %current.', array('%original' => $node->label(), '%current' => $values['title']));
+            $node->revision_log = $this->t('Title changed from %original to %current.', ['%original' => $node->label(), '%current' => $values['title']]);
             $node->title = $values['title'];
             $node->book['link_title'] = $values['title'];
             $node->setNewRevision();
             $node->save();
-            $this->logger('content')->notice('book: updated %title.', array('%title' => $node->label(), 'link' => $node->link($this->t('View'))));
+            $this->logger('content')->notice('book: updated %title.', ['%title' => $node->label(), 'link' => $node->link($this->t('View'))]);
           }
         }
       }
     }
 
-    drupal_set_message($this->t('Updated book %title.', array('%title' => $form['#node']->label())));
+    drupal_set_message($this->t('Updated book %title.', ['%title' => $form['#node']->label()]));
   }
 
   /**
@@ -139,7 +139,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
    * @see self::buildForm()
    */
   protected function bookAdminTable(NodeInterface $node, array &$form) {
-    $form['table'] = array(
+    $form['table'] = [
       '#type' => 'table',
       '#header' => [
         $this->t('Title'),
@@ -164,7 +164,7 @@ protected function bookAdminTable(NodeInterface $node, array &$form) {
           'group' => 'book-weight',
         ],
       ],
-    );
+    ];
 
     $tree = $this->bookManager->bookSubtreeData($node->book);
     // Do not include the book item itself.
@@ -173,14 +173,14 @@ protected function bookAdminTable(NodeInterface $node, array &$form) {
       $hash = Crypt::hashBase64(serialize($tree['below']));
       // Store the hash value as a hidden form element so that we can detect
       // if another user changed the book hierarchy.
-      $form['tree_hash'] = array(
+      $form['tree_hash'] = [
         '#type' => 'hidden',
         '#default_value' => $hash,
-      );
-      $form['tree_current_hash'] = array(
+      ];
+      $form['tree_current_hash'] = [
         '#type' => 'value',
         '#value' => $hash,
-      );
+      ];
       $this->bookAdminTableTree($tree['below'], $form['table']);
     }
   }
diff --git a/core/modules/book/src/Form/BookOutlineForm.php b/core/modules/book/src/Form/BookOutlineForm.php
index 8b4e3640b782a3b6bc974db9072999794298159b..1d63aacf0c08a3588574138e64ab29e665afe92a 100644
--- a/core/modules/book/src/Form/BookOutlineForm.php
+++ b/core/modules/book/src/Form/BookOutlineForm.php
@@ -107,7 +107,7 @@ protected function actions(array $form, FormStateInterface $form_state) {
   public function save(array $form, FormStateInterface $form_state) {
     $form_state->setRedirect(
       'entity.node.canonical',
-      array('node' => $this->entity->id())
+      ['node' => $this->entity->id()]
     );
     $book_link = $form_state->getValue('book');
     if (!$book_link['bid']) {
diff --git a/core/modules/book/src/Form/BookRemoveForm.php b/core/modules/book/src/Form/BookRemoveForm.php
index 4848fa29438a6a77a54c5111b394f4b3ef3bc51a..e31c0940e824ce02aaf5c920c69a97686bb8255d 100644
--- a/core/modules/book/src/Form/BookRemoveForm.php
+++ b/core/modules/book/src/Form/BookRemoveForm.php
@@ -65,7 +65,7 @@ public function buildForm(array $form, FormStateInterface $form_state, NodeInter
    * {@inheritdoc}
    */
   public function getDescription() {
-    $title = array('%title' => $this->node->label());
+    $title = ['%title' => $this->node->label()];
     if ($this->node->book['has_children']) {
       return $this->t('%title has associated child pages, which will be relocated automatically to maintain their connection to the book. To recreate the hierarchy (as it was before removing this page), %title may be added again using the Outline tab, and each of its former child pages will need to be relocated manually.', $title);
     }
@@ -85,7 +85,7 @@ public function getConfirmText() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to remove %title from the book hierarchy?', array('%title' => $this->node->label()));
+    return $this->t('Are you sure you want to remove %title from the book hierarchy?', ['%title' => $this->node->label()]);
   }
 
   /**
diff --git a/core/modules/book/src/Form/BookSettingsForm.php b/core/modules/book/src/Form/BookSettingsForm.php
index 058d0cd06373621b8cca9d218c30c3abdbe2cf05..29590ccdb573d88e1c80dcb5808390b4b59d001d 100644
--- a/core/modules/book/src/Form/BookSettingsForm.php
+++ b/core/modules/book/src/Form/BookSettingsForm.php
@@ -30,22 +30,22 @@ protected function getEditableConfigNames() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $types = node_type_get_names();
     $config = $this->config('book.settings');
-    $form['book_allowed_types'] = array(
+    $form['book_allowed_types'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Content types allowed in book outlines'),
       '#default_value' => $config->get('allowed_types'),
       '#options' => $types,
-      '#description' => $this->t('Users with the %outline-perm permission can add all content types.', array('%outline-perm' => $this->t('Administer book outlines'))),
+      '#description' => $this->t('Users with the %outline-perm permission can add all content types.', ['%outline-perm' => $this->t('Administer book outlines')]),
       '#required' => TRUE,
-    );
-    $form['book_child_type'] = array(
+    ];
+    $form['book_child_type'] = [
       '#type' => 'radios',
       '#title' => $this->t('Content type for the <em>Add child page</em> link'),
       '#default_value' => $config->get('child_type'),
       '#options' => $types,
       '#required' => TRUE,
-    );
-    $form['array_filter'] = array('#type' => 'value', '#value' => TRUE);
+    ];
+    $form['array_filter'] = ['#type' => 'value', '#value' => TRUE];
 
     return parent::buildForm($form, $form_state);
   }
@@ -55,8 +55,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    */
   public function validateForm(array &$form, FormStateInterface $form_state) {
     $child_type = $form_state->getValue('book_child_type');
-    if ($form_state->isValueEmpty(array('book_allowed_types', $child_type))) {
-      $form_state->setErrorByName('book_child_type', $this->t('The content type for the %add-child link must be one of those selected as an allowed book outline type.', array('%add-child' => $this->t('Add child page'))));
+    if ($form_state->isValueEmpty(['book_allowed_types', $child_type])) {
+      $form_state->setErrorByName('book_child_type', $this->t('The content type for the %add-child link must be one of those selected as an allowed book outline type.', ['%add-child' => $this->t('Add child page')]));
     }
 
     parent::validateForm($form, $form_state);
diff --git a/core/modules/book/src/Plugin/Block/BookNavigationBlock.php b/core/modules/book/src/Plugin/Block/BookNavigationBlock.php
index a7b0f1e32ae6b7272cce585bba076ceedbaede68..7b0156f2405efff68ba98df8954827b8d2c86cc0 100644
--- a/core/modules/book/src/Plugin/Block/BookNavigationBlock.php
+++ b/core/modules/book/src/Plugin/Block/BookNavigationBlock.php
@@ -86,26 +86,26 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'block_mode' => "all pages",
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   function blockForm($form, FormStateInterface $form_state) {
-    $options = array(
+    $options = [
       'all pages' => $this->t('Show block on all pages'),
       'book pages' => $this->t('Show block only on book pages'),
-    );
-    $form['book_block_mode'] = array(
+    ];
+    $form['book_block_mode'] = [
       '#type' => 'radios',
       '#title' => $this->t('Book navigation block display'),
       '#options' => $options,
       '#default_value' => $this->configuration['block_mode'],
       '#description' => $this->t("If <em>Show block on all pages</em> is selected, the block will contain the automatically generated menus for all of the site's books. If <em>Show block only on book pages</em> is selected, the block will contain only the one menu corresponding to the current page's book. In this case, if the current page is not in a book, no block will be displayed. The <em>Page specific visibility settings</em> or other visibility settings can be used in addition to selectively display this block."),
-      );
+      ];
 
     return $form;
   }
@@ -127,8 +127,8 @@ public function build() {
       $current_bid = empty($node->book['bid']) ? 0 : $node->book['bid'];
     }
     if ($this->configuration['block_mode'] == 'all pages') {
-      $book_menus = array();
-      $pseudo_tree = array(0 => array('below' => FALSE));
+      $book_menus = [];
+      $pseudo_tree = [0 => ['below' => FALSE]];
       foreach ($this->bookManager->getAllBooks() as $book_id => $book) {
         if ($book['bid'] == $current_bid) {
           // If the current page is a node associated with a book, the menu
@@ -146,14 +146,14 @@ public function build() {
           $pseudo_tree[0]['link'] = $book;
           $book_menus[$book_id] = $this->bookManager->bookTreeOutput($pseudo_tree);
         }
-        $book_menus[$book_id] += array(
+        $book_menus[$book_id] += [
           '#book_title' => $book['title'],
-        );
+        ];
       }
       if ($book_menus) {
-        return array(
+        return [
           '#theme' => 'book_all_books_block',
-        ) + $book_menus;
+        ] + $book_menus;
       }
     }
     elseif ($current_bid) {
@@ -175,7 +175,7 @@ public function build() {
         }
       }
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/book/src/Plugin/migrate/source/d6/Book.php b/core/modules/book/src/Plugin/migrate/source/d6/Book.php
index 76833aa7531317a26bc84b6f158b7d0533c243ef..f41bb42dfa749cb4652d1106ce98e250a941aee0 100644
--- a/core/modules/book/src/Plugin/migrate/source/d6/Book.php
+++ b/core/modules/book/src/Plugin/migrate/source/d6/Book.php
@@ -17,9 +17,9 @@ class Book extends DrupalSqlBase {
    * {@inheritdoc}
    */
   public function query() {
-    $query = $this->select('book', 'b')->fields('b', array('nid', 'bid'));
+    $query = $this->select('book', 'b')->fields('b', ['nid', 'bid']);
     $query->join('menu_links', 'ml', 'b.mlid = ml.mlid');
-    $ml_fields = array('mlid', 'plid', 'weight', 'has_children', 'depth');
+    $ml_fields = ['mlid', 'plid', 'weight', 'has_children', 'depth'];
     for ($i = 1; $i <= 9; $i++) {
       $field = "p$i";
       $ml_fields[] = $field;
@@ -42,7 +42,7 @@ public function getIds() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'nid' => $this->t('Node ID'),
       'bid' => $this->t('Book ID'),
       'mlid' => $this->t('Menu link ID'),
@@ -57,7 +57,7 @@ public function fields() {
       'p7' => $this->t('The seventh mlid in the materialized path. See p1.'),
       'p8' => $this->t('The eighth mlid in the materialized path. See p1.'),
       'p9' => $this->t('The ninth mlid in the materialized path. See p1.'),
-    );
+    ];
   }
 
 }
diff --git a/core/modules/book/src/Tests/BookBreadcrumbTest.php b/core/modules/book/src/Tests/BookBreadcrumbTest.php
index 57e1b3d6ce4ddc09a57e4e467bd42860ada01f97..d2f4d5d386a9ecfe526cd6dd3c82bd5eb6bf1dca 100644
--- a/core/modules/book/src/Tests/BookBreadcrumbTest.php
+++ b/core/modules/book/src/Tests/BookBreadcrumbTest.php
@@ -16,7 +16,7 @@ class BookBreadcrumbTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('book', 'block', 'book_breadcrumb_test');
+  public static $modules = ['book', 'block', 'book_breadcrumb_test'];
 
   /**
    * A book node.
@@ -48,8 +48,8 @@ protected function setUp() {
     $this->drupalPlaceBlock('page_title_block');
 
     // Create users.
-    $this->bookAuthor = $this->drupalCreateUser(array('create new books', 'create book content', 'edit own book content', 'add content to books'));
-    $this->adminUser = $this->drupalCreateUser(array('create new books', 'create book content', 'edit any book content', 'delete any book content', 'add content to books', 'administer blocks', 'administer permissions', 'administer book outlines', 'administer content types', 'administer site configuration'));
+    $this->bookAuthor = $this->drupalCreateUser(['create new books', 'create book content', 'edit own book content', 'add content to books']);
+    $this->adminUser = $this->drupalCreateUser(['create new books', 'create book content', 'edit any book content', 'delete any book content', 'add content to books', 'administer blocks', 'administer permissions', 'administer book outlines', 'administer content types', 'administer site configuration']);
   }
 
   /**
@@ -76,7 +76,7 @@ protected function createBreadcrumbBook() {
      *      |- Node 5
      *  |- Node 6
      */
-    $nodes = array();
+    $nodes = [];
     $nodes[0] = $this->createBookNode($book->id());
     $nodes[1] = $this->createBookNode($book->id(), $nodes[0]->id());
     $nodes[2] = $this->createBookNode($book->id(), $nodes[0]->id());
@@ -107,7 +107,7 @@ protected function createBookNode($book_nid, $parent = NULL) {
     // that when sorted nodes stay in same order.
     static $number = 0;
 
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = str_pad($number, 2, '0', STR_PAD_LEFT) . ' - SimpleTest test node ' . $this->randomMachineName(10);
     $edit['body[0][value]'] = 'SimpleTest test body ' . $this->randomMachineName(32) . ' ' . $this->randomMachineName(32);
     $edit['book[bid]'] = $book_nid;
@@ -146,7 +146,7 @@ public function testBreadcrumbTitleUpdates() {
     $this->drupalGet($nodes[4]->toUrl());
     // Fetch each node title in the current breadcrumb.
     $links = $this->xpath('//nav[@class="breadcrumb"]/ol/li/a');
-    $got_breadcrumb = array();
+    $got_breadcrumb = [];
     foreach ($links as $link) {
       $got_breadcrumb[] = (string) $link;
     }
@@ -160,7 +160,7 @@ public function testBreadcrumbTitleUpdates() {
     $this->drupalGet($nodes[4]->toUrl());
     // Fetch each node title in the current breadcrumb.
     $links = $this->xpath('//nav[@class="breadcrumb"]/ol/li/a');
-    $got_breadcrumb = array();
+    $got_breadcrumb = [];
     foreach ($links as $link) {
       $got_breadcrumb[] = (string) $link;
     }
@@ -181,7 +181,7 @@ public function testBreadcrumbAccessUpdates() {
     $this->drupalPostForm($nodes[3]->toUrl('edit-form'), $edit, 'Save');
     $this->drupalGet($nodes[4]->toUrl());
     $links = $this->xpath('//nav[@class="breadcrumb"]/ol/li/a');
-    $got_breadcrumb = array();
+    $got_breadcrumb = [];
     foreach ($links as $link) {
       $got_breadcrumb[] = (string) $link;
     }
@@ -191,7 +191,7 @@ public function testBreadcrumbAccessUpdates() {
     $config->set('hide', TRUE)->save();
     $this->drupalGet($nodes[4]->toUrl());
     $links = $this->xpath('//nav[@class="breadcrumb"]/ol/li/a');
-    $got_breadcrumb = array();
+    $got_breadcrumb = [];
     foreach ($links as $link) {
       $got_breadcrumb[] = (string) $link;
     }
diff --git a/core/modules/book/src/Tests/BookInstallTest.php b/core/modules/book/src/Tests/BookInstallTest.php
index ba70a9bcd02736a579d291db5ed345be8eba9d18..9933b1c5f8cb11cda10099ee7e4e70d8605eabde 100644
--- a/core/modules/book/src/Tests/BookInstallTest.php
+++ b/core/modules/book/src/Tests/BookInstallTest.php
@@ -17,7 +17,7 @@ class BookInstallTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/book/src/Tests/BookTest.php b/core/modules/book/src/Tests/BookTest.php
index cdd61c60ab30c26c9ad17448ea69725818eafeb4..183674fa4aa6f12eada41dc50fa0882335899658 100644
--- a/core/modules/book/src/Tests/BookTest.php
+++ b/core/modules/book/src/Tests/BookTest.php
@@ -20,7 +20,7 @@ class BookTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('book', 'block', 'node_access_test', 'book_test');
+  public static $modules = ['book', 'block', 'node_access_test', 'book_test'];
 
   /**
    * A book node.
@@ -69,10 +69,10 @@ protected function setUp() {
     node_access_rebuild();
 
     // Create users.
-    $this->bookAuthor = $this->drupalCreateUser(array('create new books', 'create book content', 'edit own book content', 'add content to books'));
-    $this->webUser = $this->drupalCreateUser(array('access printer-friendly version', 'node test view'));
-    $this->webUserWithoutNodeAccess = $this->drupalCreateUser(array('access printer-friendly version'));
-    $this->adminUser = $this->drupalCreateUser(array('create new books', 'create book content', 'edit any book content', 'delete any book content', 'add content to books', 'administer blocks', 'administer permissions', 'administer book outlines', 'node test view', 'administer content types', 'administer site configuration'));
+    $this->bookAuthor = $this->drupalCreateUser(['create new books', 'create book content', 'edit own book content', 'add content to books']);
+    $this->webUser = $this->drupalCreateUser(['access printer-friendly version', 'node test view']);
+    $this->webUserWithoutNodeAccess = $this->drupalCreateUser(['access printer-friendly version']);
+    $this->adminUser = $this->drupalCreateUser(['create new books', 'create book content', 'edit any book content', 'delete any book content', 'add content to books', 'administer blocks', 'administer permissions', 'administer book outlines', 'node test view', 'administer content types', 'administer site configuration']);
   }
 
   /**
@@ -96,7 +96,7 @@ function createBook() {
      *  |- Node 3
      *  |- Node 4
      */
-    $nodes = array();
+    $nodes = [];
     $nodes[] = $this->createBookNode($book->id()); // Node 0.
     $nodes[] = $this->createBookNode($book->id(), $nodes[0]->book['nid']); // Node 1.
     $nodes[] = $this->createBookNode($book->id(), $nodes[0]->book['nid']); // Node 2.
@@ -159,8 +159,8 @@ function testEmptyBook() {
 
     // Log in as a user with access to the book outline and save the form.
     $this->drupalLogin($this->adminUser);
-    $this->drupalPostForm('admin/structure/book/' . $book->id(), array(), t('Save book pages'));
-    $this->assertText(t('Updated book @book.', array('@book' => $book->label())));
+    $this->drupalPostForm('admin/structure/book/' . $book->id(), [], t('Save book pages'));
+    $this->assertText(t('Updated book @book.', ['@book' => $book->label()]));
   }
 
   /**
@@ -175,12 +175,12 @@ function testBook() {
 
     // Check that book pages display along with the correct outlines and
     // previous/next links.
-    $this->checkBookNode($book, array($nodes[0], $nodes[3], $nodes[4]), FALSE, FALSE, $nodes[0], array());
-    $this->checkBookNode($nodes[0], array($nodes[1], $nodes[2]), $book, $book, $nodes[1], array($book));
-    $this->checkBookNode($nodes[1], NULL, $nodes[0], $nodes[0], $nodes[2], array($book, $nodes[0]));
-    $this->checkBookNode($nodes[2], NULL, $nodes[1], $nodes[0], $nodes[3], array($book, $nodes[0]));
-    $this->checkBookNode($nodes[3], NULL, $nodes[2], $book, $nodes[4], array($book));
-    $this->checkBookNode($nodes[4], NULL, $nodes[3], $book, FALSE, array($book));
+    $this->checkBookNode($book, [$nodes[0], $nodes[3], $nodes[4]], FALSE, FALSE, $nodes[0], []);
+    $this->checkBookNode($nodes[0], [$nodes[1], $nodes[2]], $book, $book, $nodes[1], [$book]);
+    $this->checkBookNode($nodes[1], NULL, $nodes[0], $nodes[0], $nodes[2], [$book, $nodes[0]]);
+    $this->checkBookNode($nodes[2], NULL, $nodes[1], $nodes[0], $nodes[3], [$book, $nodes[0]]);
+    $this->checkBookNode($nodes[3], NULL, $nodes[2], $book, $nodes[4], [$book]);
+    $this->checkBookNode($nodes[4], NULL, $nodes[3], $book, FALSE, [$book]);
 
     $this->drupalLogout();
     $this->drupalLogin($this->bookAuthor);
@@ -203,14 +203,14 @@ function testBook() {
     $this->drupalLogout();
     $this->drupalLogin($this->webUser);
     // Verify the new outline - make sure we don't get stale cached data.
-    $this->checkBookNode($nodes[3], array($nodes[5]), $nodes[2], $book, $nodes[5], array($book));
-    $this->checkBookNode($nodes[4], NULL, $nodes[5], $book, FALSE, array($book));
+    $this->checkBookNode($nodes[3], [$nodes[5]], $nodes[2], $book, $nodes[5], [$book]);
+    $this->checkBookNode($nodes[4], NULL, $nodes[5], $book, FALSE, [$book]);
     $this->drupalLogout();
     // Create a second book, and move an existing book page into it.
     $this->drupalLogin($this->bookAuthor);
     $other_book = $this->createBookNode('new');
     $node = $this->createBookNode($book->id());
-    $edit = array('book[bid]' => $other_book->id());
+    $edit = ['book[bid]' => $other_book->id()];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
 
     $this->drupalLogout();
@@ -220,8 +220,8 @@ function testBook() {
     // First we must set $this->book to the second book, so that the
     // correct regex will be generated for testing the outline.
     $this->book = $other_book;
-    $this->checkBookNode($other_book, array($node), FALSE, FALSE, $node, array());
-    $this->checkBookNode($node, NULL, $other_book, $other_book, FALSE, array($other_book));
+    $this->checkBookNode($other_book, [$node], FALSE, FALSE, $node, []);
+    $this->checkBookNode($node, NULL, $other_book, $other_book, FALSE, [$other_book]);
 
     // Test that we can save a book programatically.
     $this->drupalLogin($this->bookAuthor);
@@ -255,38 +255,38 @@ function checkBookNode(EntityInterface $node, $nodes, $previous = FALSE, $up = F
 
     // Check outline structure.
     if ($nodes !== NULL) {
-      $this->assertPattern($this->generateOutlinePattern($nodes), format_string('Node @number outline confirmed.', array('@number' => $number)));
+      $this->assertPattern($this->generateOutlinePattern($nodes), format_string('Node @number outline confirmed.', ['@number' => $number]));
     }
     else {
-      $this->pass(format_string('Node %number does not have outline.', array('%number' => $number)));
+      $this->pass(format_string('Node %number does not have outline.', ['%number' => $number]));
     }
 
     // Check previous, up, and next links.
     if ($previous) {
       /** @var \Drupal\Core\Url $url */
       $url = $previous->urlInfo();
-      $url->setOptions(array('attributes' => array('rel' => array('prev'), 'title' => t('Go to previous page'))));
-      $text = SafeMarkup::format('<b>‹</b> @label', array('@label' => $previous->label()));
+      $url->setOptions(['attributes' => ['rel' => ['prev'], 'title' => t('Go to previous page')]]);
+      $text = SafeMarkup::format('<b>‹</b> @label', ['@label' => $previous->label()]);
       $this->assertRaw(\Drupal::l($text, $url), 'Previous page link found.');
     }
 
     if ($up) {
       /** @var \Drupal\Core\Url $url */
       $url = $up->urlInfo();
-      $url->setOptions(array('attributes' => array('title' => t('Go to parent page'))));
+      $url->setOptions(['attributes' => ['title' => t('Go to parent page')]]);
       $this->assertRaw(\Drupal::l('Up', $url), 'Up page link found.');
     }
 
     if ($next) {
       /** @var \Drupal\Core\Url $url */
       $url = $next->urlInfo();
-      $url->setOptions(array('attributes' => array('rel' => array('next'), 'title' => t('Go to next page'))));
-      $text = SafeMarkup::format('@label <b>›</b>', array('@label' => $next->label()));
+      $url->setOptions(['attributes' => ['rel' => ['next'], 'title' => t('Go to next page')]]);
+      $text = SafeMarkup::format('@label <b>›</b>', ['@label' => $next->label()]);
       $this->assertRaw(\Drupal::l($text, $url), 'Next page link found.');
     }
 
     // Compute the expected breadcrumb.
-    $expected_breadcrumb = array();
+    $expected_breadcrumb = [];
     $expected_breadcrumb[] = \Drupal::url('<front>');
     foreach ($breadcrumb as $a_node) {
       $expected_breadcrumb[] = $a_node->url();
@@ -294,7 +294,7 @@ function checkBookNode(EntityInterface $node, $nodes, $previous = FALSE, $up = F
 
     // Fetch links in the current breadcrumb.
     $links = $this->xpath('//nav[@class="breadcrumb"]/ol/li/a');
-    $got_breadcrumb = array();
+    $got_breadcrumb = [];
     foreach ($links as $link) {
       $got_breadcrumb[] = (string) $link['href'];
     }
@@ -344,7 +344,7 @@ function createBookNode($book_nid, $parent = NULL) {
     // since it uniquely identifies each call to createBookNode().
     static $number = 0; // Used to ensure that when sorted nodes stay in same order.
 
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = str_pad($number, 2, '0', STR_PAD_LEFT) . ' - SimpleTest test node ' . $this->randomMachineName(10);
     $edit['body[0][value]'] = 'SimpleTest test body ' . $this->randomMachineName(32) . ' ' . $this->randomMachineName(32);
     $edit['book[bid]'] = $book_nid;
@@ -410,7 +410,7 @@ function testBookExport() {
     // Now grant anonymous users permission to view the printer-friendly
     // version and verify that node access restrictions still prevent them from
     // seeing it.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access printer-friendly version'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access printer-friendly version']);
     $this->drupalGet('book/export/html/' . $this->book->id());
     $this->assertResponse('403', 'Anonymous user properly forbidden from seeing the printer-friendly version when denied by node access.');
   }
@@ -425,7 +425,7 @@ function testBookNavigationBlock() {
     $block = $this->drupalPlaceBlock('book_navigation');
 
     // Give anonymous users the permission 'node test view'.
-    $edit = array();
+    $edit = [];
     $edit[RoleInterface::ANONYMOUS_ID . '[node test view]'] = TRUE;
     $this->drupalPostForm('admin/people/permissions/' . RoleInterface::ANONYMOUS_ID, $edit, t('Save permissions'));
     $this->assertText(t('The changes have been saved.'), "Permission 'node test view' successfully assigned to anonymous users.");
@@ -434,7 +434,7 @@ function testBookNavigationBlock() {
     $nodes = $this->createBook();
     $this->drupalGet('<front>');
     $this->assertText($block->label(), 'Book navigation block is displayed.');
-    $this->assertText($this->book->label(), format_string('Link to book root (@title) is displayed.', array('@title' => $nodes[0]->label())));
+    $this->assertText($this->book->label(), format_string('Link to book root (@title) is displayed.', ['@title' => $nodes[0]->label()]));
     $this->assertNoText($nodes[0]->label(), 'No links to individual book pages are displayed.');
   }
 
@@ -485,8 +485,8 @@ public function testGetTableOfContents() {
     $diff = array_diff($expected_nids, array_keys($options));
     $this->assertTrue(empty($diff), 'Found all expected option keys');
     // Exclude Node 3.
-    $options = $manager->getTableOfContents($book->id(), 3, array($nodes[3]->id()));
-    $expected_nids = array($book->id(), $nodes[0]->id(), $nodes[1]->id(), $nodes[2]->id(), $nodes[4]->id());
+    $options = $manager->getTableOfContents($book->id(), 3, [$nodes[3]->id()]);
+    $expected_nids = [$book->id(), $nodes[0]->id(), $nodes[1]->id(), $nodes[2]->id(), $nodes[4]->id()];
     $this->assertEqual(count($options), count($expected_nids));
     $diff = array_diff($expected_nids, array_keys($options));
     $this->assertTrue(empty($diff), 'Found all expected option keys after excluding Node 3');
@@ -497,10 +497,10 @@ public function testGetTableOfContents() {
    */
   function testNavigationBlockOnAccessModuleInstalled() {
     $this->drupalLogin($this->adminUser);
-    $block = $this->drupalPlaceBlock('book_navigation', array('block_mode' => 'book pages'));
+    $block = $this->drupalPlaceBlock('book_navigation', ['block_mode' => 'book pages']);
 
     // Give anonymous users the permission 'node test view'.
-    $edit = array();
+    $edit = [];
     $edit[RoleInterface::ANONYMOUS_ID . '[node test view]'] = TRUE;
     $this->drupalPostForm('admin/people/permissions/' . RoleInterface::ANONYMOUS_ID, $edit, t('Save permissions'));
     $this->assertText(t('The changes have been saved.'), "Permission 'node test view' successfully assigned to anonymous users.");
@@ -530,13 +530,13 @@ function testBookDelete() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $nodes = $this->createBook();
     $this->drupalLogin($this->adminUser);
-    $edit = array();
+    $edit = [];
 
     // Test access to delete top-level and child book nodes.
     $this->drupalGet('node/' . $this->book->id() . '/outline/remove');
     $this->assertResponse('403', 'Deleting top-level book node properly forbidden.');
     $this->drupalPostForm('node/' . $nodes[4]->id() . '/outline/remove', $edit, t('Remove'));
-    $node_storage->resetCache(array($nodes[4]->id()));
+    $node_storage->resetCache([$nodes[4]->id()]);
     $node4 = $node_storage->load($nodes[4]->id());
     $this->assertTrue(empty($node4->book), 'Deleting child book node properly allowed.');
 
@@ -546,7 +546,7 @@ function testBookDelete() {
     }
     entity_delete_multiple('node', $nids);
     $this->drupalPostForm('node/' . $this->book->id() . '/outline/remove', $edit, t('Remove'));
-    $node_storage->resetCache(array($this->book->id()));
+    $node_storage->resetCache([$this->book->id()]);
     $node = $node_storage->load($this->book->id());
     $this->assertTrue(empty($node->book), 'Deleting childless top-level book node properly allowed.');
 
@@ -577,7 +577,7 @@ public function testBookOutline() {
     $this->drupalLogin($this->bookAuthor);
 
     // Create new node not yet a book.
-    $empty_book = $this->drupalCreateNode(array('type' => 'book'));
+    $empty_book = $this->drupalCreateNode(['type' => 'book']);
     $this->drupalGet('node/' . $empty_book->id() . '/outline');
     $this->assertNoLink(t('Book outline'), 'Book Author is not allowed to outline');
 
@@ -587,7 +587,7 @@ public function testBookOutline() {
     $this->assertOptionSelected('edit-book-bid', 0, 'Node does not belong to a book');
     $this->assertNoLink(t('Remove from book outline'));
 
-    $edit = array();
+    $edit = [];
     $edit['book[bid]'] = '1';
     $this->drupalPostForm('node/' . $empty_book->id() . '/outline', $edit, t('Add to book outline'));
     $node = \Drupal::entityManager()->getStorage('node')->load($empty_book->id());
@@ -606,11 +606,11 @@ public function testBookOutline() {
     $this->drupalGet('node/' . $book->id() . '/outline');
     $this->assertRaw(t('Book outline'));
     $this->clickLink(t('Remove from book outline'));
-    $this->assertRaw(t('Are you sure you want to remove %title from the book hierarchy?', array('%title' => $book->label())));
+    $this->assertRaw(t('Are you sure you want to remove %title from the book hierarchy?', ['%title' => $book->label()]));
 
     // Create a new node and set the book after the node was created.
-    $node = $this->drupalCreateNode(array('type' => 'book'));
-    $edit = array();
+    $node = $this->drupalCreateNode(['type' => 'book']);
+    $edit = [];
     $edit['book[bid]'] = $node->id();
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
     $node = \Drupal::entityManager()->getStorage('node')->load($node->id());
@@ -634,7 +634,7 @@ public function testSaveBookLink() {
     $book_manager = \Drupal::service('book.manager');
 
     // Mock a link for a new book.
-    $link = array('nid' => 1, 'has_children' => 0, 'original_bid' => 0, 'parent_depth_limit' => 8, 'pid' => 0, 'weight' => 0, 'bid' => 1);
+    $link = ['nid' => 1, 'has_children' => 0, 'original_bid' => 0, 'parent_depth_limit' => 8, 'pid' => 0, 'weight' => 0, 'bid' => 1];
     $new = TRUE;
 
     // Save the link.
diff --git a/core/modules/book/src/Tests/Views/BookRelationshipTest.php b/core/modules/book/src/Tests/Views/BookRelationshipTest.php
index 2302e8b04e1f764ecba49042ef2a18374809a543..c1f872803aeb219c0656b38f448abbfba1333a94 100644
--- a/core/modules/book/src/Tests/Views/BookRelationshipTest.php
+++ b/core/modules/book/src/Tests/Views/BookRelationshipTest.php
@@ -19,14 +19,14 @@ class BookRelationshipTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_book_view');
+  public static $testViews = ['test_book_view'];
 
   /**
    * Modules to install.
    *
    * @var array
    */
-  public static $modules = array('book_test_views', 'book', 'views');
+  public static $modules = ['book_test_views', 'book', 'views'];
 
   /**
    * A book node.
@@ -50,14 +50,14 @@ protected function setUp() {
 
     // Create users.
     $this->bookAuthor = $this->drupalCreateUser(
-      array(
+      [
         'create new books',
         'create book content',
         'edit own book content',
         'add content to books',
-      )
+      ]
     );
-    ViewTestData::createTestViews(get_class($this), array('book_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['book_test_views']);
   }
 
   /**
@@ -70,7 +70,7 @@ protected function createBook() {
     $this->book = $this->createBookNode('new');
     $book = $this->book;
 
-    $nodes = array();
+    $nodes = [];
     // Node 0.
     $nodes[] = $this->createBookNode($book->id());
     // Node 1.
@@ -110,7 +110,7 @@ protected function createBookNode($book_nid, $parent = NULL) {
     // Used to ensure that when sorted nodes stay in same order.
     static $number = 0;
 
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $number . ' - SimpleTest test node ' . $this->randomMachineName(10);
     $edit['body[0][value]'] = 'SimpleTest test body ' . $this->randomMachineName(32) . ' ' . $this->randomMachineName(32);
     $edit['book[bid]'] = $book_nid;
diff --git a/core/modules/book/tests/src/Kernel/BookUninstallTest.php b/core/modules/book/tests/src/Kernel/BookUninstallTest.php
index bcd0812484183e6ad421cd83820d6625da4be129..9430991ffe7472bb054035109dd68246876f7aac 100644
--- a/core/modules/book/tests/src/Kernel/BookUninstallTest.php
+++ b/core/modules/book/tests/src/Kernel/BookUninstallTest.php
@@ -27,11 +27,11 @@ protected function setUp() {
     parent::setUp();
     $this->installEntitySchema('user');
     $this->installEntitySchema('node');
-    $this->installSchema('book', array('book'));
-    $this->installSchema('node', array('node_access'));
-    $this->installConfig(array('node', 'book', 'field'));
+    $this->installSchema('book', ['book']);
+    $this->installSchema('node', ['node_access']);
+    $this->installConfig(['node', 'book', 'field']);
     // For uninstall to work.
-    $this->installSchema('user', array('users_data'));
+    $this->installSchema('user', ['users_data']);
   }
 
   /**
@@ -42,17 +42,17 @@ public function testBookUninstall() {
     $validation_reasons = \Drupal::service('module_installer')->validateUninstall(['book']);
     $this->assertEqual([], $validation_reasons, 'The book module is not required.');
 
-    $content_type = NodeType::create(array(
+    $content_type = NodeType::create([
       'type' => $this->randomMachineName(),
       'name' => $this->randomString(),
-    ));
+    ]);
     $content_type->save();
     $book_config = $this->config('book.settings');
     $allowed_types = $book_config->get('allowed_types');
     $allowed_types[] = $content_type->id();
     $book_config->set('allowed_types', $allowed_types)->save();
 
-    $node = Node::create(array('title' => $this->randomString(), 'type' => $content_type->id()));
+    $node = Node::create(['title' => $this->randomString(), 'type' => $content_type->id()]);
     $node->book['bid'] = 'new';
     $node->save();
 
@@ -60,7 +60,7 @@ public function testBookUninstall() {
     $validation_reasons = \Drupal::service('module_installer')->validateUninstall(['book']);
     $this->assertEqual(['To uninstall Book, delete all content that is part of a book'], $validation_reasons['book']);
 
-    $book_node = Node::create(array('title' => $this->randomString(), 'type' => 'book'));
+    $book_node = Node::create(['title' => $this->randomString(), 'type' => 'book']);
     $book_node->book['bid'] = FALSE;
     $book_node->save();
 
@@ -79,7 +79,7 @@ public function testBookUninstall() {
     $module_data = _system_rebuild_module_data();
     $this->assertFalse(isset($module_data['book']->info['required']), 'The book module is not required.');
 
-    $node = Node::create(array('title' => $this->randomString(), 'type' => $content_type->id()));
+    $node = Node::create(['title' => $this->randomString(), 'type' => $content_type->id()]);
     $node->save();
     // One node exists but is not part of a book therefore the book module is
     // not required.
@@ -87,7 +87,7 @@ public function testBookUninstall() {
     $this->assertEqual([], $validation_reasons, 'The book module is not required.');
 
     // Uninstall the Book module and check the node type is deleted.
-    \Drupal::service('module_installer')->uninstall(array('book'));
+    \Drupal::service('module_installer')->uninstall(['book']);
     $this->assertNull(NodeType::load('book'), "The book node type does not exist.");
   }
 
diff --git a/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookConfigsTest.php b/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookConfigsTest.php
index ee3c0b21773f36b1db8ca42595b04841dc19f997..17a3bfff1048455feef5fb4460d5acd21471cd12 100644
--- a/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookConfigsTest.php
+++ b/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookConfigsTest.php
@@ -34,7 +34,7 @@ public function testBookSettings() {
     $config = $this->config('book.settings');
     $this->assertIdentical('book', $config->get('child_type'));
     $this->assertIdentical('all pages', $config->get('block.navigation.mode'));
-    $this->assertIdentical(array('book'), $config->get('allowed_types'));
+    $this->assertIdentical(['book'], $config->get('allowed_types'));
     $this->assertConfigSchema(\Drupal::service('config.typed'), 'book.settings', $config->get());
   }
 
diff --git a/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookTest.php b/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookTest.php
index ffcc3fec292addea3349adbb61e355092cdb837b..f6f1730e35c6a7e7cbdc64fabc5833929f8937ed 100644
--- a/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookTest.php
+++ b/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookTest.php
@@ -32,7 +32,7 @@ protected function setUp() {
    * Tests the Drupal 6 book structure to Drupal 8 migration.
    */
   public function testBook() {
-    $nodes = Node::loadMultiple(array(4, 5, 6, 7, 8));
+    $nodes = Node::loadMultiple([4, 5, 6, 7, 8]);
     $this->assertIdentical('4', $nodes[4]->book['bid']);
     $this->assertIdentical('0', $nodes[4]->book['pid']);
 
@@ -53,8 +53,8 @@ public function testBook() {
     $this->assertIdentical('5', $tree['49990 Node 4 4']['below']['50000 Node 5 5']['link']['nid']);
     $this->assertIdentical('6', $tree['49990 Node 4 4']['below']['50000 Node 5 5']['below']['50000 Node 6 6']['link']['nid']);
     $this->assertIdentical('7', $tree['49990 Node 4 4']['below']['50000 Node 5 5']['below']['50000 Node 7 7']['link']['nid']);
-    $this->assertIdentical(array(), $tree['49990 Node 4 4']['below']['50000 Node 5 5']['below']['50000 Node 6 6']['below']);
-    $this->assertIdentical(array(), $tree['49990 Node 4 4']['below']['50000 Node 5 5']['below']['50000 Node 7 7']['below']);
+    $this->assertIdentical([], $tree['49990 Node 4 4']['below']['50000 Node 5 5']['below']['50000 Node 6 6']['below']);
+    $this->assertIdentical([], $tree['49990 Node 4 4']['below']['50000 Node 5 5']['below']['50000 Node 7 7']['below']);
   }
 
 }
diff --git a/core/modules/book/tests/src/Unit/BookManagerTest.php b/core/modules/book/tests/src/Unit/BookManagerTest.php
index fdecbbe5817742e0f63687304f92cf553e3058db..d7835539b553d4dcdda65483907ac12002db2e65 100644
--- a/core/modules/book/tests/src/Unit/BookManagerTest.php
+++ b/core/modules/book/tests/src/Unit/BookManagerTest.php
@@ -59,7 +59,7 @@ class BookManagerTest extends UnitTestCase {
   protected function setUp() {
     $this->entityManager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
     $this->translation = $this->getStringTranslationStub();
-    $this->configFactory = $this->getConfigFactoryStub(array());
+    $this->configFactory = $this->getConfigFactoryStub([]);
     $this->bookOutlineStorage = $this->getMock('Drupal\book\BookOutlineStorageInterface');
     $this->renderer = $this->getMock('\Drupal\Core\Render\RendererInterface');
     $this->bookManager = new BookManager($this->entityManager, $this->translation, $this->configFactory, $this->bookOutlineStorage, $this->renderer);
@@ -81,7 +81,7 @@ public function testGetBookParents($book, $parent, $expected) {
    *   The test data.
    */
   public function providerTestGetBookParents() {
-    $empty = array(
+    $empty = [
       'p1' => 0,
       'p2' => 0,
       'p3' => 0,
@@ -91,27 +91,27 @@ public function providerTestGetBookParents() {
       'p7' => 0,
       'p8' => 0,
       'p9' => 0,
-    );
-    return array(
+    ];
+    return [
       // Provides a book without an existing parent.
-      array(
-        array('pid' => 0, 'nid' => 12),
-        array(),
-        array('depth' => 1, 'p1' => 12) + $empty,
-      ),
+      [
+        ['pid' => 0, 'nid' => 12],
+        [],
+        ['depth' => 1, 'p1' => 12] + $empty,
+      ],
       // Provides a book with an existing parent.
-      array(
-        array('pid' => 11, 'nid' => 12),
-        array('nid' => 11, 'depth' => 1, 'p1' => 11,),
-        array('depth' => 2, 'p1' => 11, 'p2' => 12) + $empty,
-      ),
+      [
+        ['pid' => 11, 'nid' => 12],
+        ['nid' => 11, 'depth' => 1, 'p1' => 11,],
+        ['depth' => 2, 'p1' => 11, 'p2' => 12] + $empty,
+      ],
       // Provides a book with two existing parents.
-      array(
-        array('pid' => 11, 'nid' => 12),
-        array('nid' => 11, 'depth' => 2, 'p1' => 10, 'p2' => 11),
-        array('depth' => 3, 'p1' => 10, 'p2' => 11, 'p3' => 12) + $empty,
-      ),
-    );
+      [
+        ['pid' => 11, 'nid' => 12],
+        ['nid' => 11, 'depth' => 2, 'p1' => 10, 'p2' => 11],
+        ['depth' => 3, 'p1' => 10, 'p2' => 11, 'p3' => 12] + $empty,
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/book/tests/src/Unit/Menu/BookLocalTasksTest.php b/core/modules/book/tests/src/Unit/Menu/BookLocalTasksTest.php
index 927241f0b2eeb5df9d324518740c2f4fc7fb832e..5b7662c50a97f7f6946915b44bae911964c4b4a0 100644
--- a/core/modules/book/tests/src/Unit/Menu/BookLocalTasksTest.php
+++ b/core/modules/book/tests/src/Unit/Menu/BookLocalTasksTest.php
@@ -12,10 +12,10 @@
 class BookLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array(
+    $this->directoryList = [
       'book' => 'core/modules/book',
       'node' => 'core/modules/node',
-    );
+    ];
     parent::setUp();
   }
 
@@ -26,19 +26,19 @@ protected function setUp() {
    */
   public function testBookAdminLocalTasks($route) {
 
-    $this->assertLocalTasks($route, array(
-      0 => array('book.admin', 'book.settings'),
-    ));
+    $this->assertLocalTasks($route, [
+      0 => ['book.admin', 'book.settings'],
+    ]);
   }
 
   /**
    * Provides a list of routes to test.
    */
   public function getBookAdminRoutes() {
-    return array(
-      array('book.admin'),
-      array('book.settings'),
-    );
+    return [
+      ['book.admin'],
+      ['book.settings'],
+    ];
   }
 
   /**
@@ -47,19 +47,19 @@ public function getBookAdminRoutes() {
    * @dataProvider getBookNodeRoutes
    */
   public function testBookNodeLocalTasks($route) {
-    $this->assertLocalTasks($route, array(
-      0 => array('entity.node.book_outline_form', 'entity.node.canonical', 'entity.node.edit_form', 'entity.node.delete_form', 'entity.node.version_history',),
-    ));
+    $this->assertLocalTasks($route, [
+      0 => ['entity.node.book_outline_form', 'entity.node.canonical', 'entity.node.edit_form', 'entity.node.delete_form', 'entity.node.version_history',],
+    ]);
   }
 
   /**
    * Provides a list of routes to test.
    */
   public function getBookNodeRoutes() {
-    return array(
-      array('entity.node.canonical'),
-      array('entity.node.book_outline_form'),
-    );
+    return [
+      ['entity.node.canonical'],
+      ['entity.node.book_outline_form'],
+    ];
   }
 
 }
diff --git a/core/modules/breakpoint/breakpoint.module b/core/modules/breakpoint/breakpoint.module
index 103edd9b0de98687fad96668566ac6d522899e88..a0fd468df07d0ee90b3cac3e3bd7869da9c27a59 100644
--- a/core/modules/breakpoint/breakpoint.module
+++ b/core/modules/breakpoint/breakpoint.module
@@ -15,13 +15,13 @@ function breakpoint_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.breakpoint':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Breakpoint module keeps track of the height, width, and resolution breakpoints where a responsive design needs to change in order to respond to different devices being used to view the site. This module does not have a user interface. For more information, see the <a href=":docs">online documentation for the Breakpoint module</a>.', array(':docs' => 'https://www.drupal.org/documentation/modules/breakpoint')) . '</p>';
+      $output .= '<p>' . t('The Breakpoint module keeps track of the height, width, and resolution breakpoints where a responsive design needs to change in order to respond to different devices being used to view the site. This module does not have a user interface. For more information, see the <a href=":docs">online documentation for the Breakpoint module</a>.', [':docs' => 'https://www.drupal.org/documentation/modules/breakpoint']) . '</p>';
       $output .= '<h4>' . t('Terminology') . '</h4>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Breakpoint') . '</dt>';
       $output .= '<dd>' . t('A breakpoint separates the height or width of viewports (screens, printers, and other media output types) into steps. For instance, a width breakpoint of 40em creates two steps: one for widths up to 40em and one for widths above 40em. Breakpoints can be used to define when layouts should shift from one form to another, when images should be resized, and other changes that need to respond to changes in viewport height or width.') . '</dd>';
       $output .= '<dt>' . t('Media query') . '</dt>';
-      $output .= '<dd>' . t('<a href=":w3">Media  queries</a> are a formal way to encode breakpoints. For instance, a width breakpoint at 40em would be written as the media query "(min-width: 40em)". Breakpoints are really just media queries with some additional meta-data, such as a name and multiplier information.', array(':w3' => 'http://www.w3.org/TR/css3-mediaqueries/')) . '</dd>';
+      $output .= '<dd>' . t('<a href=":w3">Media  queries</a> are a formal way to encode breakpoints. For instance, a width breakpoint at 40em would be written as the media query "(min-width: 40em)". Breakpoints are really just media queries with some additional meta-data, such as a name and multiplier information.', [':w3' => 'http://www.w3.org/TR/css3-mediaqueries/']) . '</dd>';
       $output .= '<dt>' . t('Resolution multiplier') . '</dt>';
       $output .= '<dd>' . t('Resolution multipliers are a measure of the viewport\'s device resolution, defined to be the ratio between the physical pixel size of the active device and the <a href="http://en.wikipedia.org/wiki/Device_independent_pixel">device-independent pixel</a> size. The Breakpoint module defines multipliers of 1, 1.5, and 2; when defining breakpoints, modules and themes can define which multipliers apply to each breakpoint.') . '</dd>';
       $output .= '<dt>' . t('Breakpoint group') . '</dt>';
diff --git a/core/modules/breakpoint/src/Breakpoint.php b/core/modules/breakpoint/src/Breakpoint.php
index 0c51e6353f3b99f54d695c28ff736819da949f41..0928d559616911cd93c8848877274c0187ed5917 100644
--- a/core/modules/breakpoint/src/Breakpoint.php
+++ b/core/modules/breakpoint/src/Breakpoint.php
@@ -16,7 +16,7 @@ class Breakpoint extends PluginBase implements BreakpointInterface {
    * {@inheritdoc}
    */
   public function getLabel() {
-    return $this->t($this->pluginDefinition['label'], array(), array('context' => 'breakpoint'));
+    return $this->t($this->pluginDefinition['label'], [], ['context' => 'breakpoint']);
   }
 
   /**
diff --git a/core/modules/breakpoint/src/BreakpointManager.php b/core/modules/breakpoint/src/BreakpointManager.php
index 693ffa9b1ed02ac4cf5f9dda09a651750b9f1d40..30caf27ebeb349408e0d479b636c744e387ba3ee 100644
--- a/core/modules/breakpoint/src/BreakpointManager.php
+++ b/core/modules/breakpoint/src/BreakpointManager.php
@@ -50,7 +50,7 @@ class BreakpointManager extends DefaultPluginManager implements BreakpointManage
   /**
    * {@inheritdoc}
    */
-  protected $defaults = array(
+  protected $defaults = [
     // Human readable label for breakpoint.
     'label' => '',
     // The media query for the breakpoint.
@@ -58,14 +58,14 @@ class BreakpointManager extends DefaultPluginManager implements BreakpointManage
     // Weight used for ordering breakpoints.
     'weight' => 0,
     // Breakpoint multipliers.
-    'multipliers' => array(),
+    'multipliers' => [],
     // The breakpoint group.
     'group' => '',
     // Default class for breakpoint implementations.
     'class' => 'Drupal\breakpoint\Breakpoint',
     // The plugin id. Set by the plugin system based on the top-level YAML key.
     'id' => '',
-  );
+  ];
 
   /**
    * The theme handler.
@@ -86,7 +86,7 @@ class BreakpointManager extends DefaultPluginManager implements BreakpointManage
    *
    * @var array
    */
-  protected $instances = array();
+  protected $instances = [];
 
   /**
    * Constructs a new BreakpointManager instance.
@@ -106,7 +106,7 @@ public function __construct(ModuleHandlerInterface $module_handler, ThemeHandler
     $this->themeHandler = $theme_handler;
     $this->setStringTranslation($string_translation);
     $this->alterInfo('breakpoints');
-    $this->setCacheBackend($cache_backend, 'breakpoints', array('breakpoints'));
+    $this->setCacheBackend($cache_backend, 'breakpoints', ['breakpoints']);
   }
 
   /**
@@ -153,19 +153,19 @@ public function getBreakpointsByGroup($group) {
         $this->breakpointsByGroup[$group] = $cache->data;
       }
       else {
-        $breakpoints = array();
+        $breakpoints = [];
         foreach ($this->getDefinitions() as $plugin_id => $plugin_definition) {
           if ($plugin_definition['group'] == $group) {
             $breakpoints[$plugin_id] = $plugin_definition;
           }
         }
-        uasort($breakpoints, array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
-        $this->cacheBackend->set($this->cacheKey . ':' . $group, $breakpoints, Cache::PERMANENT, array('breakpoints'));
+        uasort($breakpoints, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
+        $this->cacheBackend->set($this->cacheKey . ':' . $group, $breakpoints, Cache::PERMANENT, ['breakpoints']);
         $this->breakpointsByGroup[$group] = $breakpoints;
       }
     }
 
-    $instances = array();
+    $instances = [];
     foreach ($this->breakpointsByGroup[$group] as $plugin_id => $definition) {
       if (!isset($this->instances[$plugin_id])) {
         $this->instances[$plugin_id] = $this->createInstance($plugin_id);
@@ -184,16 +184,16 @@ public function getGroups() {
       $groups = $cache->data;
     }
     else {
-      $groups = array();
+      $groups = [];
       foreach ($this->getDefinitions() as $plugin_definition) {
         if (!isset($groups[$plugin_definition['group']])) {
           $groups[$plugin_definition['group']] = $plugin_definition['group'];
         }
       }
-      $this->cacheBackend->set($this->cacheKey . '::groups', $groups, Cache::PERMANENT, array('breakpoints'));
+      $this->cacheBackend->set($this->cacheKey . '::groups', $groups, Cache::PERMANENT, ['breakpoints']);
     }
     // Get the labels. This is not cacheable due to translation.
-    $group_labels = array();
+    $group_labels = [];
     foreach ($groups as $group) {
       $group_labels[$group] = $this->getGroupLabel($group);
     }
@@ -205,7 +205,7 @@ public function getGroups() {
    * {@inheritdoc}
    */
   public function getGroupProviders($group) {
-    $providers = array();
+    $providers = [];
     $breakpoints = $this->getBreakpointsByGroup($group);
     foreach ($breakpoints as $breakpoint) {
       $provider = $breakpoint->getProvider();
@@ -229,7 +229,7 @@ public function getGroupProviders($group) {
   public function clearCachedDefinitions() {
     parent::clearCachedDefinitions();
     $this->breakpointsByGroup = NULL;
-    $this->instances = array();
+    $this->instances = [];
   }
 
   /**
@@ -251,7 +251,7 @@ protected function getGroupLabel($group) {
     }
     else {
       // Custom group label that should be translatable.
-      $label = $this->t($group, array(), array('context' => 'breakpoint'));
+      $label = $this->t($group, [], ['context' => 'breakpoint']);
     }
     return $label;
   }
diff --git a/core/modules/breakpoint/tests/src/Kernel/BreakpointDiscoveryTest.php b/core/modules/breakpoint/tests/src/Kernel/BreakpointDiscoveryTest.php
index 7683ea1f668b312554d41f1035fd1139f3c16709..dc8175787b49c5fbb5bd75fb25ce93c2f3c2223c 100644
--- a/core/modules/breakpoint/tests/src/Kernel/BreakpointDiscoveryTest.php
+++ b/core/modules/breakpoint/tests/src/Kernel/BreakpointDiscoveryTest.php
@@ -16,11 +16,11 @@ class BreakpointDiscoveryTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'breakpoint', 'breakpoint_module_test');
+  public static $modules = ['system', 'breakpoint', 'breakpoint_module_test'];
 
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('breakpoint_theme_test'));
+    \Drupal::service('theme_handler')->install(['breakpoint_theme_test']);
   }
 
   /**
@@ -28,56 +28,56 @@ protected function setUp() {
    */
   public function testThemeBreakpoints() {
     // Verify the breakpoint group for breakpoint_theme_test was created.
-    $expected_breakpoints = array(
-      'breakpoint_theme_test.mobile' => array(
+    $expected_breakpoints = [
+      'breakpoint_theme_test.mobile' => [
         'label' => 'mobile',
         'mediaQuery' => '(min-width: 0px)',
         'weight' => 0,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
-        ),
+        ],
         'provider' => 'breakpoint_theme_test',
         'id' => 'breakpoint_theme_test.mobile',
         'group' => 'breakpoint_theme_test',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-      'breakpoint_theme_test.narrow' => array(
+      ],
+      'breakpoint_theme_test.narrow' => [
         'label' => 'narrow',
         'mediaQuery' => '(min-width: 560px)',
         'weight' => 1,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
-        ),
+        ],
         'provider' => 'breakpoint_theme_test',
         'id' => 'breakpoint_theme_test.narrow',
         'group' => 'breakpoint_theme_test',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-      'breakpoint_theme_test.wide' => array(
+      ],
+      'breakpoint_theme_test.wide' => [
         'label' => 'wide',
         'mediaQuery' => '(min-width: 851px)',
         'weight' => 2,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
-        ),
+        ],
         'provider' => 'breakpoint_theme_test',
         'id' => 'breakpoint_theme_test.wide',
         'group' => 'breakpoint_theme_test',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-      'breakpoint_theme_test.tv' => array(
+      ],
+      'breakpoint_theme_test.tv' => [
         'label' => 'tv',
         'mediaQuery' => 'only screen and (min-width: 1220px)',
         'weight' => 3,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
-        ),
+        ],
         'provider' => 'breakpoint_theme_test',
         'id' => 'breakpoint_theme_test.tv',
         'group' => 'breakpoint_theme_test',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-    );
+      ],
+    ];
 
     $breakpoints = \Drupal::service('breakpoint.manager')->getBreakpointsByGroup('breakpoint_theme_test');
     foreach ($expected_breakpoints as $id => $expected_breakpoint) {
@@ -93,46 +93,46 @@ public function testThemeBreakpoints() {
    */
   public function testCustomBreakpointGroups() {
     // Verify the breakpoint group for breakpoint_theme_test.group2 was created.
-    $expected_breakpoints = array(
-      'breakpoint_theme_test.group2.narrow' => array(
+    $expected_breakpoints = [
+      'breakpoint_theme_test.group2.narrow' => [
         'label' => 'narrow',
         'mediaQuery' => '(min-width: 560px)',
         'weight' => 0,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
           '2x',
-        ),
+        ],
         'provider' => 'breakpoint_theme_test',
         'id' => 'breakpoint_theme_test.group2.narrow',
         'group' => 'breakpoint_theme_test.group2',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-      'breakpoint_theme_test.group2.wide' => array(
+      ],
+      'breakpoint_theme_test.group2.wide' => [
         'label' => 'wide',
         'mediaQuery' => '(min-width: 851px)',
         'weight' => 1,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
           '2x',
-        ),
+        ],
         'provider' => 'breakpoint_theme_test',
         'id' => 'breakpoint_theme_test.group2.wide',
         'group' => 'breakpoint_theme_test.group2',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-      'breakpoint_module_test.breakpoint_theme_test.group2.tv' => array(
+      ],
+      'breakpoint_module_test.breakpoint_theme_test.group2.tv' => [
         'label' => 'tv',
         'mediaQuery' => '(min-width: 6000px)',
         'weight' => 2,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
-        ),
+        ],
         'provider' => 'breakpoint_module_test',
         'id' => 'breakpoint_module_test.breakpoint_theme_test.group2.tv',
         'group' => 'breakpoint_theme_test.group2',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-    );
+      ],
+    ];
 
     $breakpoints = \Drupal::service('breakpoint.manager')->getBreakpointsByGroup('breakpoint_theme_test.group2');
     foreach ($expected_breakpoints as $id => $expected_breakpoint) {
@@ -144,33 +144,33 @@ public function testCustomBreakpointGroups() {
    * Test the breakpoint group created for a module.
    */
   public function testModuleBreakpoints() {
-    $expected_breakpoints = array(
-      'breakpoint_module_test.mobile' => array(
+    $expected_breakpoints = [
+      'breakpoint_module_test.mobile' => [
         'label' => 'mobile',
         'mediaQuery' => '(min-width: 0px)',
         'weight' => 0,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
-        ),
+        ],
         'provider' => 'breakpoint_module_test',
         'id' => 'breakpoint_module_test.mobile',
         'group' => 'breakpoint_module_test',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-      'breakpoint_module_test.standard' => array(
+      ],
+      'breakpoint_module_test.standard' => [
         'label' => 'standard',
         'mediaQuery' => '(min-width: 560px)',
         'weight' => 1,
-        'multipliers' => array(
+        'multipliers' => [
           '1x',
           '2x',
-        ),
+        ],
         'provider' => 'breakpoint_module_test',
         'id' => 'breakpoint_module_test.standard',
         'group' => 'breakpoint_module_test',
         'class' => 'Drupal\\breakpoint\\Breakpoint',
-      ),
-    );
+      ],
+    ];
 
     $breakpoints = \Drupal::service('breakpoint.manager')->getBreakpointsByGroup('breakpoint_module_test');
     $this->assertEqual(array_keys($expected_breakpoints), array_keys($breakpoints));
@@ -180,20 +180,20 @@ public function testModuleBreakpoints() {
    * Test the collection of breakpoint groups.
    */
   public function testBreakpointGroups() {
-    $expected = array(
+    $expected = [
       'bartik' => 'Bartik',
       'breakpoint_module_test' => 'Breakpoint test module',
       'breakpoint_theme_test' => 'Breakpoint test theme',
       'breakpoint_theme_test.group2' => 'breakpoint_theme_test.group2',
-    );
+    ];
     $breakpoint_groups = \Drupal::service('breakpoint.manager')->getGroups();
     // Ensure the order is as expected. Should be sorted by label.
     $this->assertIdentical($expected, $this->castSafeStrings($breakpoint_groups));
 
-    $expected = array(
+    $expected = [
       'breakpoint_theme_test' => 'theme',
       'breakpoint_module_test' => 'module',
-    );
+    ];
     $breakpoint_group_providers = \Drupal::service('breakpoint.manager')->getGroupProviders('breakpoint_theme_test.group2');
     $this->assertEqual($expected, $breakpoint_group_providers);
   }
diff --git a/core/modules/breakpoint/tests/src/Unit/BreakpointTest.php b/core/modules/breakpoint/tests/src/Unit/BreakpointTest.php
index bdd5cd9341e27288acbc724468a5cac28d791dd0..4b8fd8846550c353a00f5ba53299791b52bd4486 100644
--- a/core/modules/breakpoint/tests/src/Unit/BreakpointTest.php
+++ b/core/modules/breakpoint/tests/src/Unit/BreakpointTest.php
@@ -24,9 +24,9 @@ class BreakpointTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $pluginDefinition = array(
+  protected $pluginDefinition = [
     'id' => 'breakpoint',
-  );
+  ];
 
   /**
    * The breakpoint under test.
@@ -52,7 +52,7 @@ protected function setUp() {
    * Sets up the breakpoint defaults.
    */
   protected function setupBreakpoint() {
-    $this->breakpoint = new Breakpoint(array(), $this->pluginId, $this->pluginDefinition);
+    $this->breakpoint = new Breakpoint([], $this->pluginId, $this->pluginDefinition);
     $this->breakpoint->setStringTranslation($this->stringTranslation);
   }
 
@@ -62,7 +62,7 @@ protected function setupBreakpoint() {
   public function testGetLabel() {
     $this->pluginDefinition['label'] = 'Test label';
     $this->setupBreakpoint();
-    $this->assertEquals(new TranslatableMarkup('Test label', array(), array('context' => 'breakpoint'), $this->stringTranslation), $this->breakpoint->getLabel());
+    $this->assertEquals(new TranslatableMarkup('Test label', [], ['context' => 'breakpoint'], $this->stringTranslation), $this->breakpoint->getLabel());
   }
 
   /**
@@ -88,9 +88,9 @@ public function testGetMediaQuery() {
    * @covers ::getMultipliers
    */
   public function testGetMultipliers() {
-    $this->pluginDefinition['multipliers'] = array('1x', '2x');
+    $this->pluginDefinition['multipliers'] = ['1x', '2x'];
     $this->setupBreakpoint();
-    $this->assertSame(array('1x', '2x'), $this->breakpoint->getMultipliers());
+    $this->assertSame(['1x', '2x'], $this->breakpoint->getMultipliers());
   }
 
   /**
diff --git a/core/modules/ckeditor/ckeditor.admin.inc b/core/modules/ckeditor/ckeditor.admin.inc
index 14b2fd7c9196487e7d90245d5ab19382382da623..8a8f68c69bd4885cb89b7cf5b291b2c1c20720aa 100644
--- a/core/modules/ckeditor/ckeditor.admin.inc
+++ b/core/modules/ckeditor/ckeditor.admin.inc
@@ -29,8 +29,8 @@ function template_preprocess_ckeditor_settings_toolbar(&$variables) {
   // Create lists of active and disabled buttons.
   $editor = $variables['editor'];
   $plugins = $variables['plugins'];
-  $buttons = array();
-  $multiple_buttons = array();
+  $buttons = [];
+  $multiple_buttons = [];
   foreach ($plugins as $plugin_buttons) {
     foreach ($plugin_buttons as $button_name => $button) {
       $button['name'] = $button_name;
@@ -40,11 +40,11 @@ function template_preprocess_ckeditor_settings_toolbar(&$variables) {
       $buttons[$button_name] = $button;
     }
   }
-  $button_groups = array();
-  $active_buttons = array();
+  $button_groups = [];
+  $active_buttons = [];
   $settings = $editor->getSettings();
   foreach ($settings['toolbar']['rows'] as $row_number => $row) {
-    $button_groups[$row_number] = array();
+    $button_groups[$row_number] = [];
     foreach ($row as $group) {
       foreach ($group['items'] as $button_name) {
         if (isset($buttons[$button_name])) {
@@ -75,31 +75,31 @@ function template_preprocess_ckeditor_settings_toolbar(&$variables) {
       $value = $button['image_alternative'];
     }
     elseif (isset($button['image']) || isset($button['image' . $rtl])) {
-      $value = array(
+      $value = [
         '#theme' => 'image',
         '#uri' => isset($button['image' . $rtl]) ? $button['image' . $rtl] : $button['image'],
         '#title' => $button['label'],
         '#prefix' => '<a href="#" role="button" title="' . $button['label'] . '" aria-label="' . $button['label'] . '"><span class="cke_button_icon">',
         '#suffix' => '</span></a>',
-      );
+      ];
     }
     else {
       $value = '?';
     }
 
     // Build the button attributes.
-    $attributes = array(
+    $attributes = [
       'data-drupal-ckeditor-button-name' => $button['name'],
-    );
+    ];
     if (!empty($button['attributes'])) {
       $attributes = array_merge($attributes, $button['attributes']);
     }
 
     // Build the button item.
-    $button_item = array(
+    $button_item = [
       'value' => $value,
       'attributes' => new Attribute($attributes),
-    );
+    ];
     // If this button has group information, add it to the attributes.
     if (!empty($button['group'])) {
       $button_item['group'] = $button['group'];
@@ -114,14 +114,14 @@ function template_preprocess_ckeditor_settings_toolbar(&$variables) {
   };
 
   // Assemble list of disabled buttons (which are always a single row).
-  $variables['active_buttons'] = array();
+  $variables['active_buttons'] = [];
   foreach ($active_buttons as $row_number => $button_row) {
     foreach ($button_groups[$row_number] as $group_name) {
       $group_name = (string) $group_name;
-      $variables['active_buttons'][$row_number][$group_name] = array(
+      $variables['active_buttons'][$row_number][$group_name] = [
         'group_name_class' => Html::getClass($group_name),
-        'buttons' => array(),
-      );
+        'buttons' => [],
+      ];
       $buttons = array_filter($button_row, function ($button) use ($group_name) {
         return (string) $button['group'] === $group_name;
       });
@@ -131,12 +131,12 @@ function template_preprocess_ckeditor_settings_toolbar(&$variables) {
     }
   }
   // Assemble list of disabled buttons (which are always a single row).
-  $variables['disabled_buttons'] = array();
+  $variables['disabled_buttons'] = [];
   foreach ($disabled_buttons as $button) {
     $variables['disabled_buttons'][] = $build_button_item($button, $rtl);
   }
   // Assemble list of multiple buttons that may be added multiple times.
-  $variables['multiple_buttons'] = array();
+  $variables['multiple_buttons'] = [];
   foreach ($multiple_buttons as $button) {
     $variables['multiple_buttons'][] = $build_button_item($button, $rtl);
   }
diff --git a/core/modules/ckeditor/ckeditor.module b/core/modules/ckeditor/ckeditor.module
index 115afe24cf9b22608c01487938be092123e43c78..79052534406f55aac276ed448d86f32bb46bf383 100644
--- a/core/modules/ckeditor/ckeditor.module
+++ b/core/modules/ckeditor/ckeditor.module
@@ -17,21 +17,21 @@ function ckeditor_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.ckeditor':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The CKEditor module provides a highly-accessible, highly-usable visual text editor and adds a toolbar to text fields. Users can use buttons to format content and to create semantically correct and valid HTML. The CKEditor module uses the framework provided by the <a href=":text_editor">Text Editor module</a>. It requires JavaScript to be enabled in the browser. For more information, see the <a href=":doc_url">online documentation for the CKEditor module</a> and the <a href=":cke_url">CKEditor website</a>.', array( ':doc_url' => 'https://www.drupal.org/documentation/modules/ckeditor', ':cke_url' => 'http://ckeditor.com', ':text_editor' => \Drupal::url('help.page', array('name' => 'editor')))) . '</p>';
+      $output .= '<p>' . t('The CKEditor module provides a highly-accessible, highly-usable visual text editor and adds a toolbar to text fields. Users can use buttons to format content and to create semantically correct and valid HTML. The CKEditor module uses the framework provided by the <a href=":text_editor">Text Editor module</a>. It requires JavaScript to be enabled in the browser. For more information, see the <a href=":doc_url">online documentation for the CKEditor module</a> and the <a href=":cke_url">CKEditor website</a>.', [ ':doc_url' => 'https://www.drupal.org/documentation/modules/ckeditor', ':cke_url' => 'http://ckeditor.com', ':text_editor' => \Drupal::url('help.page', ['name' => 'editor'])]) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Enabling CKEditor for individual text formats') . '</dt>';
-      $output .= '<dd>' . t('CKEditor has to be enabled and configured separately for individual text formats from the <a href=":formats">Text formats and editors page</a> because the filter settings for each text format can be different. For more information, see the <a href=":text_editor">Text Editor help page</a> and <a href=":filter">Filter help page</a>.', array(':formats' => \Drupal::url('filter.admin_overview'), ':text_editor' => \Drupal::url('help.page', array('name' => 'editor')), ':filter' => \Drupal::url('help.page', array('name' => 'filter')))) . '</dd>';
+      $output .= '<dd>' . t('CKEditor has to be enabled and configured separately for individual text formats from the <a href=":formats">Text formats and editors page</a> because the filter settings for each text format can be different. For more information, see the <a href=":text_editor">Text Editor help page</a> and <a href=":filter">Filter help page</a>.', [':formats' => \Drupal::url('filter.admin_overview'), ':text_editor' => \Drupal::url('help.page', ['name' => 'editor']), ':filter' => \Drupal::url('help.page', ['name' => 'filter'])]) . '</dd>';
       $output .= '<dt>' . t('Configuring the toolbar') . '</dt>';
       $output .= '<dd>' . t('When CKEditor is chosen from the <em>Text editor</em> drop-down menu, its toolbar configuration is displayed. You can add and remove buttons from the <em>Active toolbar</em> by dragging and dropping them, and additional rows can be added to organize the buttons.') . '</dd>';
       $output .= '<dt>' . t('Formatting content') . '</dt>';
-      $output .= '<dd>' . t('CKEditor only allow users to format content in accordance with the filter configuration of the specific text format. If a text format excludes certain HTML tags, the corresponding toolbar buttons are not displayed to users when they edit a text field in this format. For more information see the <a href=":filter">Filter help page</a>.', array(':filter' => \Drupal::url('help.page', array('name' => 'filter')))) . '</dd>';
+      $output .= '<dd>' . t('CKEditor only allow users to format content in accordance with the filter configuration of the specific text format. If a text format excludes certain HTML tags, the corresponding toolbar buttons are not displayed to users when they edit a text field in this format. For more information see the <a href=":filter">Filter help page</a>.', [':filter' => \Drupal::url('help.page', ['name' => 'filter'])]) . '</dd>';
       $output .= '<dt>' . t('Toggling between formatted text and HTML source') . '</dt>';
       $output .= '<dd>' . t('If the <em>Source</em> button is available in the toolbar, users can click this button to disable the visual editor and edit the HTML source directly. After toggling back, the visual editor uses the allowed HTML tags to format the text — independent of whether buttons for these tags are available in the toolbar. If the text format is set to <em>limit the use of HTML tags</em>, then all excluded tags will be stripped out of the HTML source when the user toggles back to the text editor.') . '</dd>';
       $output .= '<dt>' . t('Check my spelling as I type') . '</dt>';
       $output .= '<dd>' . t('By default, CKEditor is configured to leverage your browser\'s spell check capability. Make sure your browser\'s spell checker is enabled in your browser\'s settings. To access suggested corrections for misspelled words, it may be necessary to hold the <em>Control</em> or <em>command</em> (Mac) key while right-clicking the misspelling.') . '</dd>';
       $output .= '<dt>' . t('Accessibility features') . '</dt>';
-      $output .= '<dd>' . t('The built in WYSIWYG editor (CKEditor) comes with a number of <a href=":features">accessibility features</a>. CKEditor comes with built in <a href=":shortcuts">keyboard shortcuts</a>, which can be beneficial for both power users and keyboard only users.', array(':features' => 'http://docs.ckeditor.com/#!/guide/dev_a11y', ':shortcuts' => 'http://docs.ckeditor.com/#!/guide/dev_shortcuts')) . '</dd>';
+      $output .= '<dd>' . t('The built in WYSIWYG editor (CKEditor) comes with a number of <a href=":features">accessibility features</a>. CKEditor comes with built in <a href=":shortcuts">keyboard shortcuts</a>, which can be beneficial for both power users and keyboard only users.', [':features' => 'http://docs.ckeditor.com/#!/guide/dev_a11y', ':shortcuts' => 'http://docs.ckeditor.com/#!/guide/dev_shortcuts']) . '</dd>';
       $output .= '<dt>' . t('Generating accessible content') . '</dt>';
       $output .= '<dd>' . t('HTML tables can be created with both table headers as well as caption/summary elements. Alt text is required by default on images added through CKEditor (note that this can be overridden). Semantic HTML5 figure/figcaption are available to add captions to images.') . '</dd>';
       $output .= '</dl>';
@@ -43,12 +43,12 @@ function ckeditor_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function ckeditor_theme() {
-  return array(
-    'ckeditor_settings_toolbar' => array(
+  return [
+    'ckeditor_settings_toolbar' => [
       'file' => 'ckeditor.admin.inc',
-      'variables' => array('editor' => NULL, 'plugins' => NULL),
-    ),
-  );
+      'variables' => ['editor' => NULL, 'plugins' => NULL],
+    ],
+  ];
 }
 
 /**
@@ -79,7 +79,7 @@ function ckeditor_ckeditor_css_alter(array &$css, Editor $editor) {
  * @endcode
  */
 function _ckeditor_theme_css($theme = NULL) {
-  $css = array();
+  $css = [];
   if (!isset($theme)) {
     $theme = \Drupal::config('system.theme')->get('default');
   }
diff --git a/core/modules/ckeditor/src/CKEditorPluginBase.php b/core/modules/ckeditor/src/CKEditorPluginBase.php
index 2fb479834b62651b1a44dc948542cd301f2274c7..99f26630f23ccf1a1632fddf6b28e858f8f5ddab 100644
--- a/core/modules/ckeditor/src/CKEditorPluginBase.php
+++ b/core/modules/ckeditor/src/CKEditorPluginBase.php
@@ -41,14 +41,14 @@ function isInternal() {
    * {@inheritdoc}
    */
   function getDependencies(Editor $editor) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   function getLibraries(Editor $editor) {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/ckeditor/src/CKEditorPluginManager.php b/core/modules/ckeditor/src/CKEditorPluginManager.php
index dd3315a35a26a9ef7b337f6917651b91e4d0f827..735cfa6678c67f56499e51ac75b93dbc6d0f8879 100644
--- a/core/modules/ckeditor/src/CKEditorPluginManager.php
+++ b/core/modules/ckeditor/src/CKEditorPluginManager.php
@@ -68,8 +68,8 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
   public function getEnabledPluginFiles(Editor $editor, $include_internal_plugins = FALSE) {
     $plugins = array_keys($this->getDefinitions());
     $toolbar_buttons = $this->getEnabledButtons($editor);
-    $enabled_plugins = array();
-    $additional_plugins = array();
+    $enabled_plugins = [];
+    $additional_plugins = [];
 
     foreach ($plugins as $plugin_id) {
       $plugin = $this->createInstance($plugin_id);
@@ -139,7 +139,7 @@ public static function getEnabledButtons(Editor $editor) {
    */
   public function getButtons() {
     $plugins = array_keys($this->getDefinitions());
-    $buttons_plugins = array();
+    $buttons_plugins = [];
 
     foreach ($plugins as $plugin_id) {
       $plugin = $this->createInstance($plugin_id);
@@ -167,16 +167,16 @@ public function injectPluginSettingsForm(array &$form, FormStateInterface $form_
     foreach (array_keys($definitions) as $plugin_id) {
       $plugin = $this->createInstance($plugin_id);
       if ($plugin instanceof CKEditorPluginConfigurableInterface) {
-        $plugin_settings_form = array();
-        $form['plugins'][$plugin_id] = array(
+        $plugin_settings_form = [];
+        $form['plugins'][$plugin_id] = [
           '#type' => 'details',
           '#title' => $definitions[$plugin_id]['label'],
           '#open' => TRUE,
           '#group' => 'editor][settings][plugin_settings',
-          '#attributes' => array(
+          '#attributes' => [
             'data-ckeditor-plugin-id' => $plugin_id,
-          ),
-        );
+          ],
+        ];
         // Provide enough metadata for the drupal.ckeditor.admin library to
         // allow it to automatically show/hide the vertical tab containing the
         // settings for this plugin. Only do this if it's a CKEditor plugin that
@@ -206,7 +206,7 @@ public function injectPluginSettingsForm(array &$form, FormStateInterface $form_
    */
   public function getCssFiles(Editor $editor) {
     $enabled_plugins = array_keys($this->getEnabledPluginFiles($editor, TRUE));
-    $css_files = array();
+    $css_files = [];
 
     foreach ($enabled_plugins as $plugin_id) {
       $plugin = $this->createInstance($plugin_id);
diff --git a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalImage.php b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalImage.php
index 8529adb5add8d5c5e84104770d4d8c548c899e03..90d4eae8f4792612653b261e436fe71d02d7f921 100644
--- a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalImage.php
+++ b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalImage.php
@@ -29,31 +29,31 @@ public function getFile() {
    * {@inheritdoc}
    */
   public function getLibraries(Editor $editor) {
-    return array(
+    return [
       'core/drupal.ajax',
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getConfig(Editor $editor) {
-    return array(
+    return [
       'drupalImage_dialogTitleAdd' => $this->t('Insert Image'),
       'drupalImage_dialogTitleEdit' => $this->t('Edit Image'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getButtons() {
-    return array(
-      'DrupalImage' => array(
+    return [
+      'DrupalImage' => [
         'label' => $this->t('Image'),
         'image' => drupal_get_path('module', 'ckeditor') . '/js/plugins/drupalimage/icons/drupalimage.png',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -66,7 +66,7 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
     $form_state->loadInclude('editor', 'admin.inc');
     $form['image_upload'] = editor_image_upload_settings_form($editor);
     $form['image_upload']['#attached']['library'][] = 'ckeditor/drupal.ckeditor.drupalimage.admin';
-    $form['image_upload']['#element_validate'][] = array($this, 'validateImageUploadSettings');
+    $form['image_upload']['#element_validate'][] = [$this, 'validateImageUploadSettings'];
     return $form;
   }
 
@@ -80,9 +80,9 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
    * @see editor_image_upload_settings_form()
    */
   function validateImageUploadSettings(array $element, FormStateInterface $form_state) {
-    $settings = &$form_state->getValue(array('editor', 'settings', 'plugins', 'drupalimage', 'image_upload'));
+    $settings = &$form_state->getValue(['editor', 'settings', 'plugins', 'drupalimage', 'image_upload']);
     $form_state->get('editor')->setImageUploadSettings($settings);
-    $form_state->unsetValue(array('editor', 'settings', 'plugins', 'drupalimage'));
+    $form_state->unsetValue(['editor', 'settings', 'plugins', 'drupalimage']);
   }
 
 }
diff --git a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalImageCaption.php b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalImageCaption.php
index 16c3759d936f6aeceeae8a8b654a3942766ff7ab..4241c3ca027833e8555acd1dbc564b0c2ac8bd8b 100644
--- a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalImageCaption.php
+++ b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalImageCaption.php
@@ -30,16 +30,16 @@ public function isInternal() {
    * {@inheritdoc}
    */
   public function getDependencies(Editor $editor) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getLibraries(Editor $editor) {
-    return array(
+    return [
       'ckeditor/drupal.ckeditor.plugins.drupalimagecaption',
-    );
+    ];
   }
 
   /**
@@ -54,24 +54,24 @@ public function getFile() {
    */
   public function getConfig(Editor $editor) {
     $format = $editor->getFilterFormat();
-    return array(
+    return [
       'image2_captionedClass' => 'caption caption-img',
-      'image2_alignClasses' => array('align-left', 'align-center', 'align-right'),
+      'image2_alignClasses' => ['align-left', 'align-center', 'align-right'],
       'drupalImageCaption_captionPlaceholderText' => $this->t('Enter caption here'),
       // Only enable those parts of DrupalImageCaption for which the
       // corresponding Drupal text filters are enabled.
       'drupalImageCaption_captionFilterEnabled' => $format->filters('filter_caption')->status,
       'drupalImageCaption_alignFilterEnabled' => $format->filters('filter_align')->status,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getCssFiles(Editor $editor) {
-    return array(
+    return [
       drupal_get_path('module', 'ckeditor') . '/css/plugins/drupalimagecaption/ckeditor.drupalimagecaption.css'
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalLink.php b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalLink.php
index f347ebf230f6c8f51da5512ac899e30cdaab706b..a6363f6b73fd13528da9328f31e95da32dd9c818 100644
--- a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalLink.php
+++ b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/DrupalLink.php
@@ -27,19 +27,19 @@ public function getFile() {
    * {@inheritdoc}
    */
   public function getLibraries(Editor $editor) {
-    return array(
+    return [
       'core/drupal.ajax',
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getConfig(Editor $editor) {
-    return array(
+    return [
       'drupalLink_dialogTitleAdd' => $this->t('Add Link'),
       'drupalLink_dialogTitleEdit' => $this->t('Edit Link'),
-    );
+    ];
   }
 
   /**
@@ -47,16 +47,16 @@ public function getConfig(Editor $editor) {
    */
   public function getButtons() {
     $path = drupal_get_path('module', 'ckeditor') . '/js/plugins/drupallink';
-    return array(
-      'DrupalLink' => array(
+    return [
+      'DrupalLink' => [
         'label' => $this->t('Link'),
         'image' => $path . '/icons/drupallink.png',
-      ),
-      'DrupalUnlink' => array(
+      ],
+      'DrupalUnlink' => [
         'label' => $this->t('Unlink'),
         'image' => $path . '/icons/drupalunlink.png',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/Internal.php b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/Internal.php
index 5011282c3916717f91ebac2272833b42b7c79744..9a04ce72a20a53a8edf621dbcb4184a2521909c3 100644
--- a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/Internal.php
+++ b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/Internal.php
@@ -100,14 +100,14 @@ public function getFile() {
    */
   public function getConfig(Editor $editor) {
     // Reasonable defaults that provide expected basic behavior.
-    $config = array(
+    $config = [
       'customConfig' => '', // Don't load CKEditor's config.js file.
       'pasteFromWordPromptCleanup' => TRUE,
       'resize_dir' => 'vertical',
-      'justifyClasses' => array('text-align-left', 'text-align-center', 'text-align-right', 'text-align-justify'),
+      'justifyClasses' => ['text-align-left', 'text-align-center', 'text-align-right', 'text-align-justify'],
       'entities' => FALSE,
       'disableNativeSpellChecker' => FALSE,
-    );
+    ];
 
     // Add the allowedContent setting, which ensures CKEditor only allows tags
     // and attributes that are allowed by the text format for this text editor.
@@ -144,145 +144,145 @@ public function getButtons() {
       ];
     };
 
-    return array(
+    return [
       // "basicstyles" plugin.
-      'Bold' => array(
+      'Bold' => [
         'label' => $this->t('Bold'),
         'image_alternative' => $button('bold'),
         'image_alternative_rtl' => $button('bold', 'rtl'),
-      ),
-      'Italic' => array(
+      ],
+      'Italic' => [
         'label' => $this->t('Italic'),
         'image_alternative' => $button('italic'),
         'image_alternative_rtl' => $button('italic', 'rtl'),
-      ),
-      'Underline' => array(
+      ],
+      'Underline' => [
         'label' => $this->t('Underline'),
         'image_alternative' => $button('underline'),
         'image_alternative_rtl' => $button('underline', 'rtl'),
-      ),
-      'Strike' => array(
+      ],
+      'Strike' => [
         'label' => $this->t('Strike-through'),
         'image_alternative' => $button('strike'),
         'image_alternative_rtl' => $button('strike', 'rtl'),
-      ),
-      'Superscript' => array(
+      ],
+      'Superscript' => [
         'label' => $this->t('Superscript'),
         'image_alternative' => $button('super script'),
         'image_alternative_rtl' => $button('super script', 'rtl'),
-      ),
-      'Subscript' => array(
+      ],
+      'Subscript' => [
         'label' => $this->t('Subscript'),
         'image_alternative' => $button('sub script'),
         'image_alternative_rtl' => $button('sub script', 'rtl'),
-      ),
+      ],
       // "removeformat" plugin.
-      'RemoveFormat' => array(
+      'RemoveFormat' => [
         'label' => $this->t('Remove format'),
         'image_alternative' => $button('remove format'),
         'image_alternative_rtl' => $button('remove format', 'rtl'),
-      ),
+      ],
       // "justify" plugin.
-      'JustifyLeft' => array(
+      'JustifyLeft' => [
         'label' => $this->t('Align left'),
         'image_alternative' => $button('justify left'),
         'image_alternative_rtl' => $button('justify left', 'rtl'),
-      ),
-      'JustifyCenter' => array(
+      ],
+      'JustifyCenter' => [
         'label' => $this->t('Align center'),
         'image_alternative' => $button('justify center'),
         'image_alternative_rtl' => $button('justify center', 'rtl'),
-      ),
-      'JustifyRight' => array(
+      ],
+      'JustifyRight' => [
         'label' => $this->t('Align right'),
         'image_alternative' => $button('justify right'),
         'image_alternative_rtl' => $button('justify right', 'rtl'),
-      ),
-      'JustifyBlock' => array(
+      ],
+      'JustifyBlock' => [
         'label' => $this->t('Justify'),
         'image_alternative' => $button('justify block'),
         'image_alternative_rtl' => $button('justify block', 'rtl'),
-      ),
+      ],
       // "list" plugin.
-      'BulletedList' => array(
+      'BulletedList' => [
         'label' => $this->t('Bullet list'),
         'image_alternative' => $button('bulleted list'),
         'image_alternative_rtl' => $button('bulleted list', 'rtl'),
-      ),
-      'NumberedList' => array(
+      ],
+      'NumberedList' => [
         'label' => $this->t('Numbered list'),
         'image_alternative' => $button('numbered list'),
         'image_alternative_rtl' => $button('numbered list', 'rtl'),
-      ),
+      ],
       // "indent" plugin.
-      'Outdent' => array(
+      'Outdent' => [
         'label' => $this->t('Outdent'),
         'image_alternative' => $button('outdent'),
         'image_alternative_rtl' => $button('outdent', 'rtl'),
-      ),
-      'Indent' => array(
+      ],
+      'Indent' => [
         'label' => $this->t('Indent'),
         'image_alternative' => $button('indent'),
         'image_alternative_rtl' => $button('indent', 'rtl'),
-      ),
+      ],
       // "undo" plugin.
-      'Undo' => array(
+      'Undo' => [
         'label' => $this->t('Undo'),
         'image_alternative' => $button('undo'),
         'image_alternative_rtl' => $button('undo', 'rtl'),
-      ),
-      'Redo' => array(
+      ],
+      'Redo' => [
         'label' => $this->t('Redo'),
         'image_alternative' => $button('redo'),
         'image_alternative_rtl' => $button('redo', 'rtl'),
-      ),
+      ],
       // "blockquote" plugin.
-      'Blockquote' => array(
+      'Blockquote' => [
         'label' => $this->t('Blockquote'),
         'image_alternative' => $button('blockquote'),
         'image_alternative_rtl' => $button('blockquote', 'rtl'),
-      ),
+      ],
       // "horizontalrule" plugin
-      'HorizontalRule' => array(
+      'HorizontalRule' => [
         'label' => $this->t('Horizontal rule'),
         'image_alternative' => $button('horizontal rule'),
         'image_alternative_rtl' => $button('horizontal rule', 'rtl'),
-      ),
+      ],
       // "clipboard" plugin.
-      'Cut' => array(
+      'Cut' => [
         'label' => $this->t('Cut'),
         'image_alternative' => $button('cut'),
         'image_alternative_rtl' => $button('cut', 'rtl'),
-      ),
-      'Copy' => array(
+      ],
+      'Copy' => [
         'label' => $this->t('Copy'),
         'image_alternative' => $button('copy'),
         'image_alternative_rtl' => $button('copy', 'rtl'),
-      ),
-      'Paste' => array(
+      ],
+      'Paste' => [
         'label' => $this->t('Paste'),
         'image_alternative' => $button('paste'),
         'image_alternative_rtl' => $button('paste', 'rtl'),
-      ),
+      ],
       // "pastetext" plugin.
-      'PasteText' => array(
+      'PasteText' => [
         'label' => $this->t('Paste Text'),
         'image_alternative' => $button('paste text'),
         'image_alternative_rtl' => $button('paste text', 'rtl'),
-      ),
+      ],
       // "pastefromword" plugin.
-      'PasteFromWord' => array(
+      'PasteFromWord' => [
         'label' => $this->t('Paste from Word'),
         'image_alternative' => $button('paste from word'),
         'image_alternative_rtl' => $button('paste from word', 'rtl'),
-      ),
+      ],
       // "specialchar" plugin.
-      'SpecialChar' => array(
+      'SpecialChar' => [
         'label' => $this->t('Character map'),
         'image_alternative' => $button('special char'),
         'image_alternative_rtl' => $button('special char', 'rtl'),
-      ),
-      'Format' => array(
+      ],
+      'Format' => [
         'label' => $this->t('HTML block format'),
         'image_alternative' => [
           '#type' => 'inline_template',
@@ -291,33 +291,33 @@ public function getButtons() {
             'format_text' => $this->t('Format'),
           ],
         ],
-      ),
+      ],
       // "table" plugin.
-      'Table' => array(
+      'Table' => [
         'label' => $this->t('Table'),
         'image_alternative' => $button('table'),
         'image_alternative_rtl' => $button('table', 'rtl'),
-      ),
+      ],
       // "showblocks" plugin.
-      'ShowBlocks' => array(
+      'ShowBlocks' => [
         'label' => $this->t('Show blocks'),
         'image_alternative' => $button('show blocks'),
         'image_alternative_rtl' => $button('show blocks', 'rtl'),
-      ),
+      ],
       // "sourcearea" plugin.
-      'Source' => array(
+      'Source' => [
         'label' => $this->t('Source code'),
         'image_alternative' => $button('source'),
         'image_alternative_rtl' => $button('source', 'rtl'),
-      ),
+      ],
       // "maximize" plugin.
-      'Maximize' => array(
+      'Maximize' => [
         'label' => $this->t('Maximize'),
         'image_alternative' => $button('maximize'),
         'image_alternative_rtl' => $button('maximize', 'rtl'),
-      ),
+      ],
       // No plugin, separator "button" for toolbar builder UI use only.
-      '-' => array(
+      '-' => [
         'label' => $this->t('Separator'),
         'image_alternative' => [
           '#type' => 'inline_template',
@@ -326,13 +326,13 @@ public function getButtons() {
             'button_separator_text' => $this->t('Button separator'),
           ],
         ],
-        'attributes' => array(
-          'class' => array('ckeditor-button-separator'),
+        'attributes' => [
+          'class' => ['ckeditor-button-separator'],
           'data-drupal-ckeditor-type' => 'separator',
-        ),
+        ],
         'multiple' => TRUE,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -350,7 +350,7 @@ protected function generateFormatTagsSetting(Editor $editor) {
     // When no text format is associated yet, assume no tag is allowed.
     // @see \Drupal\Editor\EditorInterface::hasAssociatedFilterFormat()
     if (!$editor->hasAssociatedFilterFormat()) {
-      return array();
+      return [];
     }
 
     $format = $editor->getFilterFormat();
@@ -416,7 +416,7 @@ protected function generateACFSettings(Editor $editor) {
 
     // When nothing is disallowed, set allowedContent to true.
     if (!in_array(FilterInterface::TYPE_HTML_RESTRICTOR, $filter_types)) {
-      return array(TRUE, FALSE);
+      return [TRUE, FALSE];
     }
     // Generate setting that accurately reflects allowed tags and attributes.
     else {
@@ -441,10 +441,10 @@ protected function generateACFSettings(Editor $editor) {
       // When all HTML is allowed, also set allowedContent to true and
       // disallowedContent to false.
       if ($html_restrictions === FALSE) {
-        return array(TRUE, FALSE);
+        return [TRUE, FALSE];
       }
-      $allowed = array();
-      $disallowed = array();
+      $allowed = [];
+      $disallowed = [];
       if (isset($html_restrictions['forbidden_tags'])) {
         foreach ($html_restrictions['forbidden_tags'] as $tag) {
           $disallowed[$tag] = TRUE;
@@ -453,11 +453,11 @@ protected function generateACFSettings(Editor $editor) {
       foreach ($html_restrictions['allowed'] as $tag => $attributes) {
         // Tell CKEditor the tag is allowed, but no attributes.
         if ($attributes === FALSE) {
-          $allowed[$tag] = array(
+          $allowed[$tag] = [
             'attributes' => FALSE,
             'styles' => FALSE,
             'classes' => FALSE,
-          );
+          ];
         }
         // Tell CKEditor the tag is allowed, as well as any attribute on it. The
         // "style" and "class" attributes are handled separately by CKEditor:
@@ -465,11 +465,11 @@ protected function generateACFSettings(Editor $editor) {
         // attributes, unless you state specific values for them that are
         // allowed. Or, in this case: any value for them is allowed.
         elseif ($attributes === TRUE) {
-          $allowed[$tag] = array(
+          $allowed[$tag] = [
             'attributes' => TRUE,
             'styles' => TRUE,
             'classes' => TRUE,
-          );
+          ];
           // We've just marked that any value for the "style" and "class"
           // attributes is allowed. However, that may not be the case: the "*"
           // tag may still apply restrictions.
@@ -518,11 +518,11 @@ protected function generateACFSettings(Editor $editor) {
         elseif (is_array($attributes)) {
           // Set defaults (these will be overridden below if more specific
           // values are present).
-          $allowed[$tag] = array(
+          $allowed[$tag] = [
             'attributes' => FALSE,
             'styles' => FALSE,
             'classes' => FALSE,
-          );
+          ];
           // Configure allowed attributes, allowed "style" attribute values and
           // allowed "class" attribute values.
           // CKEditor only allows specific values for the "class" and "style"
@@ -600,7 +600,7 @@ protected function generateACFSettings(Editor $editor) {
       ksort($allowed);
       ksort($disallowed);
 
-      return array($allowed, $disallowed);
+      return [$allowed, $disallowed];
     }
   }
 
diff --git a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/Language.php b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/Language.php
index 980d5e909a600ff2f33b7b984cf3fe5dbb7b9613..31ce08fc07aab845915825d43d787be5876f8eb3 100644
--- a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/Language.php
+++ b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/Language.php
@@ -104,7 +104,7 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
     }
 
     $predefined_languages = LanguageManager::getStandardLanguageList();
-    $form['language_list'] = array(
+    $form['language_list'] = [
       '#title' => $this->t('Language list'),
       '#title_display' => 'invisible',
       '#type' => 'select',
@@ -118,7 +118,7 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
         '@count' => count($predefined_languages),
       ]),
       '#attached' => ['library' => ['ckeditor/drupal.ckeditor.language.admin']],
-    );
+    ];
 
     return $form;
   }
@@ -127,9 +127,9 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
    * {@inheritdoc}
    */
   function getCssFiles(Editor $editor) {
-    return array(
+    return [
         drupal_get_path('module', 'ckeditor') . '/css/plugins/language/ckeditor.language.css'
-    );
+    ];
   }
 
 }
diff --git a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/StylesCombo.php b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/StylesCombo.php
index 9c4f224752e4923ca75623dfec9d318bb2f0e433..7b3386efe034de7d248ce3866483873a20e92b52 100644
--- a/core/modules/ckeditor/src/Plugin/CKEditorPlugin/StylesCombo.php
+++ b/core/modules/ckeditor/src/Plugin/CKEditorPlugin/StylesCombo.php
@@ -36,7 +36,7 @@ public function getFile() {
    * {@inheritdoc}
    */
   public function getConfig(Editor $editor) {
-    $config = array();
+    $config = [];
     $settings = $editor->getSettings();
     if (!isset($settings['plugins']['stylescombo']['styles'])) {
       return $config;
@@ -50,8 +50,8 @@ public function getConfig(Editor $editor) {
    * {@inheritdoc}
    */
   public function getButtons() {
-    return array(
-      'Styles' => array(
+    return [
+      'Styles' => [
         'label' => $this->t('Font style'),
         'image_alternative' => [
           '#type' => 'inline_template',
@@ -60,8 +60,8 @@ public function getButtons() {
             'styles_text' => $this->t('Styles'),
           ],
         ],
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -69,25 +69,25 @@ public function getButtons() {
    */
   public function settingsForm(array $form, FormStateInterface $form_state, Editor $editor) {
     // Defaults.
-    $config = array('styles' => '');
+    $config = ['styles' => ''];
     $settings = $editor->getSettings();
     if (isset($settings['plugins']['stylescombo'])) {
       $config = $settings['plugins']['stylescombo'];
     }
 
-    $form['styles'] = array(
+    $form['styles'] = [
       '#title' => $this->t('Styles'),
       '#title_display' => 'invisible',
       '#type' => 'textarea',
       '#default_value' => $config['styles'],
       '#description' => $this->t('A list of classes that will be provided in the "Styles" dropdown. Enter one or more classes on each line in the format: element.classA.classB|Label. Example: h1.title|Title. Advanced example: h1.fancy.title|Fancy title.<br />These styles should be available in your theme\'s CSS file.'),
-      '#attached' => array(
-        'library' => array('ckeditor/drupal.ckeditor.stylescombo.admin'),
-      ),
-      '#element_validate' => array(
-        array($this, 'validateStylesValue'),
-      ),
-    );
+      '#attached' => [
+        'library' => ['ckeditor/drupal.ckeditor.stylescombo.admin'],
+      ],
+      '#element_validate' => [
+        [$this, 'validateStylesValue'],
+      ],
+    ];
 
     return $form;
   }
@@ -120,7 +120,7 @@ public function validateStylesValue(array $element, FormStateInterface $form_sta
    *   syntax is invalid.
    */
   protected function generateStylesSetSetting($styles) {
-    $styles_set = array();
+    $styles_set = [];
 
     // Early-return when empty.
     $styles = trim($styles);
@@ -128,7 +128,7 @@ protected function generateStylesSetSetting($styles) {
       return $styles_set;
     }
 
-    $styles = str_replace(array("\r\n", "\r"), "\n", $styles);
+    $styles = str_replace(["\r\n", "\r"], "\n", $styles);
     foreach (explode("\n", $styles) as $style) {
       $style = trim($style);
 
@@ -149,14 +149,14 @@ protected function generateStylesSetSetting($styles) {
 
       // Build the data structure CKEditor's stylescombo plugin expects.
       // @see http://docs.cksource.com/CKEditor_3.x/Developers_Guide/Styles
-      $configured_style = array(
+      $configured_style = [
         'name' => trim($label),
         'element' => trim($element),
-      );
+      ];
       if (!empty($classes)) {
-        $configured_style['attributes'] = array(
+        $configured_style['attributes'] = [
           'class' => implode(' ', array_map('trim', $classes))
-        );
+        ];
       }
       $styles_set[] = $configured_style;
     }
diff --git a/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php b/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
index ba054a61ce5ee821f76844453c2d90ee4d079495..d3a7f6b73704647e1c5ca8b98dd0d69c7f4bf5f0 100644
--- a/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
+++ b/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
@@ -102,36 +102,36 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function getDefaultSettings() {
-    return array(
-      'toolbar' => array(
-        'rows' => array(
+    return [
+      'toolbar' => [
+        'rows' => [
           // Button groups.
-          array(
-            array(
+          [
+            [
               'name' => $this->t('Formatting'),
-              'items' => array('Bold', 'Italic',),
-            ),
-            array(
+              'items' => ['Bold', 'Italic',],
+            ],
+            [
               'name' => $this->t('Links'),
-              'items' => array('DrupalLink', 'DrupalUnlink',),
-            ),
-            array(
+              'items' => ['DrupalLink', 'DrupalUnlink',],
+            ],
+            [
               'name' => $this->t('Lists'),
-              'items' => array('BulletedList', 'NumberedList',),
-            ),
-            array(
+              'items' => ['BulletedList', 'NumberedList',],
+            ],
+            [
               'name' => $this->t('Media'),
-              'items' => array('Blockquote', 'DrupalImage',),
-            ),
-            array(
+              'items' => ['Blockquote', 'DrupalImage',],
+            ],
+            [
               'name' => $this->t('Tools'),
-              'items' => array('Source',),
-            ),
-          ),
-        ),
-      ),
+              'items' => ['Source',],
+            ],
+          ],
+        ],
+      ],
       'plugins' => ['language' => ['language_list' => 'un']],
-    );
+    ];
   }
 
   /**
@@ -140,39 +140,39 @@ public function getDefaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state, Editor $editor) {
     $settings = $editor->getSettings();
 
-    $ckeditor_settings_toolbar = array(
+    $ckeditor_settings_toolbar = [
       '#theme' => 'ckeditor_settings_toolbar',
       '#editor' => $editor,
       '#plugins' => $this->ckeditorPluginManager->getButtons(),
-    );
-    $form['toolbar'] = array(
+    ];
+    $form['toolbar'] = [
       '#type' => 'container',
-      '#attached' => array(
-        'library' => array('ckeditor/drupal.ckeditor.admin'),
+      '#attached' => [
+        'library' => ['ckeditor/drupal.ckeditor.admin'],
         'drupalSettings' => [
           'ckeditor' => [
             'toolbarAdmin' => (string) $this->renderer->renderPlain($ckeditor_settings_toolbar),
           ],
         ],
-      ),
-      '#attributes' => array('class' => array('ckeditor-toolbar-configuration')),
-    );
+      ],
+      '#attributes' => ['class' => ['ckeditor-toolbar-configuration']],
+    ];
 
-    $form['toolbar']['button_groups'] = array(
+    $form['toolbar']['button_groups'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Toolbar buttons'),
       '#default_value' => json_encode($settings['toolbar']['rows']),
-      '#attributes' => array('class' => array('ckeditor-toolbar-textarea')),
-    );
+      '#attributes' => ['class' => ['ckeditor-toolbar-textarea']],
+    ];
 
     // CKEditor plugin settings, if any.
-    $form['plugin_settings'] = array(
+    $form['plugin_settings'] = [
       '#type' => 'vertical_tabs',
       '#title' => $this->t('CKEditor plugin settings'),
-      '#attributes' => array(
+      '#attributes' => [
         'id' => 'ckeditor-plugin-settings',
-      ),
-    );
+      ],
+    ];
     $this->ckeditorPluginManager->injectPluginSettingsForm($form, $form_state, $editor);
     if (count(Element::children($form['plugins'])) === 0) {
       unset($form['plugins']);
@@ -186,7 +186,7 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
     // settings to be updated accordingly.
     // Get a list of all external plugins and their corresponding files.
     $plugins = array_keys($this->ckeditorPluginManager->getDefinitions());
-    $all_external_plugins = array();
+    $all_external_plugins = [];
     foreach ($plugins as $plugin_id) {
       $plugin = $this->ckeditorPluginManager->createInstance($plugin_id);
       if (!$plugin->isInternal()) {
@@ -196,37 +196,37 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
     // Get a list of all buttons that are provided by all plugins.
     $all_buttons = array_reduce($this->ckeditorPluginManager->getButtons(), function($result, $item) {
       return array_merge($result, array_keys($item));
-    }, array());
+    }, []);
     // Build a fake Editor object, which we'll use to generate JavaScript
     // settings for this fake Editor instance.
-    $fake_editor = Editor::create(array(
+    $fake_editor = Editor::create([
       'format' => $editor->id(),
       'editor' => 'ckeditor',
-      'settings' => array(
+      'settings' => [
         // Single toolbar row, single button group, all existing buttons.
-        'toolbar' => array(
-         'rows' => array(
-           0 => array(
-             0 => array(
+        'toolbar' => [
+         'rows' => [
+           0 => [
+             0 => [
                'name' => 'All existing buttons',
                'items' => $all_buttons,
-             )
-           )
-         ),
-        ),
+             ]
+           ]
+         ],
+        ],
         'plugins' => $settings['plugins'],
-      ),
-    ));
+      ],
+    ]);
     $config = $this->getJSSettings($fake_editor);
     // Remove the ACF configuration that is generated based on filter settings,
     // because otherwise we cannot retrieve per-feature metadata.
     unset($config['allowedContent']);
-    $form['hidden_ckeditor'] = array(
+    $form['hidden_ckeditor'] = [
       '#markup' => '<div id="ckeditor-hidden" class="hidden"></div>',
-      '#attached' => array(
+      '#attached' => [
         'drupalSettings' => ['ckeditor' => ['hiddenCKEditorConfig' => $config]],
-      ),
-    );
+      ],
+    ];
 
     return $form;
   }
@@ -238,7 +238,7 @@ public function settingsFormSubmit(array $form, FormStateInterface $form_state)
     // Modify the toolbar settings by reference. The values in
     // $form_state->getValue(array('editor', 'settings')) will be saved directly
     // by editor_form_filter_admin_format_submit().
-    $toolbar_settings = &$form_state->getValue(array('editor', 'settings', 'toolbar'));
+    $toolbar_settings = &$form_state->getValue(['editor', 'settings', 'toolbar']);
 
     // The rows key is not built into the form structure, so decode the button
     // groups data into this new key and remove the button_groups key.
@@ -246,8 +246,8 @@ public function settingsFormSubmit(array $form, FormStateInterface $form_state)
     unset($toolbar_settings['button_groups']);
 
     // Remove the plugin settings' vertical tabs state; no need to save that.
-    if ($form_state->hasValue(array('editor', 'settings', 'plugins'))) {
-      $form_state->unsetValue(array('editor', 'settings', 'plugin_settings'));
+    if ($form_state->hasValue(['editor', 'settings', 'plugins'])) {
+      $form_state->unsetValue(['editor', 'settings', 'plugin_settings']);
     }
   }
 
@@ -255,7 +255,7 @@ public function settingsFormSubmit(array $form, FormStateInterface $form_state)
    * {@inheritdoc}
    */
   public function getJSSettings(Editor $editor) {
-    $settings = array();
+    $settings = [];
 
     // Get the settings for all enabled plugins, even the internal ones.
     $enabled_plugins = array_keys($this->ckeditorPluginManager->getEnabledPluginFiles($editor, TRUE));
@@ -279,7 +279,7 @@ public function getJSSettings(Editor $editor) {
 
     // Next, set the most fundamental CKEditor settings.
     $external_plugin_files = $this->ckeditorPluginManager->getEnabledPluginFiles($editor);
-    $settings += array(
+    $settings += [
       'toolbar' => $this->buildToolbarJSSetting($editor),
       'contentsCss' => $this->buildContentsCssJSSetting($editor),
       'extraPlugins' => implode(',', array_keys($external_plugin_files)),
@@ -290,15 +290,15 @@ public function getJSSettings(Editor $editor) {
       // styles.js by default.
       // See http://dev.ckeditor.com/ticket/9992#comment:9.
       'stylesSet' => FALSE,
-    );
+    ];
 
     // Finally, set Drupal-specific CKEditor settings.
     $root_relative_file_url = function ($uri) {
       return file_url_transform_relative(file_create_url($uri));
     };
-    $settings += array(
+    $settings += [
       'drupalExternalPlugins' => array_map($root_relative_file_url, $external_plugin_files),
-    );
+    ];
 
     // Parse all CKEditor plugin JavaScript files for translations.
     if ($this->moduleHandler->moduleExists('locale')) {
@@ -326,7 +326,7 @@ public function getLangcodes() {
       $langcodes = $langcode_cache->data;
     }
     if (empty($langcodes)) {
-      $langcodes = array();
+      $langcodes = [];
       // Collect languages included with CKEditor based on file listing.
       $files = scandir('core/assets/vendor/ckeditor/lang');
       foreach ($files as $file) {
@@ -341,7 +341,7 @@ public function getLangcodes() {
     // Get language mapping if available to map to Drupal language codes.
     // This is configurable in the user interface and not expensive to get, so
     // we don't include it in the cached language list.
-    $language_mappings = $this->moduleHandler->moduleExists('language') ? language_get_browser_drupal_langcode_mappings() : array();
+    $language_mappings = $this->moduleHandler->moduleExists('language') ? language_get_browser_drupal_langcode_mappings() : [];
     foreach ($langcodes as $langcode) {
       // If this language code is available in a Drupal mapping, use that to
       // compute a possibility for matching from the Drupal langcode to the
@@ -363,9 +363,9 @@ public function getLangcodes() {
    * {@inheritdoc}
    */
   public function getLibraries(Editor $editor) {
-    $libraries = array(
+    $libraries = [
       'ckeditor/drupal.ckeditor',
-    );
+    ];
 
     // Get the required libraries for any enabled plugins.
     $enabled_plugins = array_keys($this->ckeditorPluginManager->getEnabledPluginFiles($editor));
@@ -389,7 +389,7 @@ public function getLibraries(Editor $editor) {
    *   An array containing the "toolbar" configuration.
    */
   public function buildToolbarJSSetting(Editor $editor) {
-    $toolbar = array();
+    $toolbar = [];
 
     $settings = $editor->getSettings();
     foreach ($settings['toolbar']['rows'] as $row) {
@@ -412,15 +412,15 @@ public function buildToolbarJSSetting(Editor $editor) {
    *   An array containing the "contentsCss" configuration.
    */
   public function buildContentsCssJSSetting(Editor $editor) {
-    $css = array(
+    $css = [
       drupal_get_path('module', 'ckeditor') . '/css/ckeditor-iframe.css',
       drupal_get_path('module', 'system') . '/css/components/align.module.css',
-    );
+    ];
     $this->moduleHandler->alter('ckeditor_css', $css, $editor);
     // Get a list of all enabled plugins' iframe instance CSS files.
     $plugins_css = array_reduce($this->ckeditorPluginManager->getCssFiles($editor), function($result, $item) {
       return array_merge($result, array_values($item));
-    }, array());
+    }, []);
     $css = array_merge($css, $plugins_css);
     $css = array_merge($css, _ckeditor_theme_css());
     $css = array_map('file_create_url', $css);
diff --git a/core/modules/ckeditor/src/Tests/CKEditorAdminTest.php b/core/modules/ckeditor/src/Tests/CKEditorAdminTest.php
index d10180db3b4dcd0f653b3d94a6b6c855cd4c66be..ed08c26d0c047df041c5a00223aa6529136df00e 100644
--- a/core/modules/ckeditor/src/Tests/CKEditorAdminTest.php
+++ b/core/modules/ckeditor/src/Tests/CKEditorAdminTest.php
@@ -20,7 +20,7 @@ class CKEditorAdminTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'editor', 'ckeditor');
+  public static $modules = ['filter', 'editor', 'ckeditor'];
 
   /**
    * A user with the 'administer filters' permission.
@@ -33,16 +33,16 @@ protected function setUp() {
     parent::setUp();
 
     // Create text format.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $filtered_html_format->save();
 
     // Create admin user.
-    $this->adminUser = $this->drupalCreateUser(array('administer filters'));
+    $this->adminUser = $this->drupalCreateUser(['administer filters']);
   }
 
   /**
@@ -70,43 +70,43 @@ function testExistingFormat() {
     $this->assertTrue(((string) $options[0]['selected']) === 'selected', 'Option 1 ("None") is selected.');
 
     // Select the "CKEditor" editor and click the "Save configuration" button.
-    $edit = array(
+    $edit = [
       'editor[editor]' => 'ckeditor',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->assertRaw(t('You must configure the selected text editor.'));
 
     // Ensure the CKEditor editor returns the expected default settings.
-    $expected_default_settings = array(
-      'toolbar' => array(
-        'rows' => array(
+    $expected_default_settings = [
+      'toolbar' => [
+        'rows' => [
           // Button groups
-          array(
-            array(
+          [
+            [
               'name' => 'Formatting',
-              'items' => array('Bold', 'Italic',),
-            ),
-            array(
+              'items' => ['Bold', 'Italic',],
+            ],
+            [
               'name' => 'Links',
-              'items' => array('DrupalLink', 'DrupalUnlink',),
-            ),
-            array(
+              'items' => ['DrupalLink', 'DrupalUnlink',],
+            ],
+            [
               'name' => 'Lists',
-              'items' => array('BulletedList', 'NumberedList',),
-            ),
-            array(
+              'items' => ['BulletedList', 'NumberedList',],
+            ],
+            [
               'name' => 'Media',
-              'items' => array('Blockquote', 'DrupalImage',),
-            ),
-            array(
+              'items' => ['Blockquote', 'DrupalImage',],
+            ],
+            [
               'name' => 'Tools',
-              'items' => array('Source',),
-            ),
-          ),
-        ),
-      ),
+              'items' => ['Source',],
+            ],
+          ],
+        ],
+      ],
       'plugins' => ['language' => ['language_list' => 'un']],
-    );
+    ];
     $this->assertIdentical($this->castSafeStrings($ckeditor->getDefaultSettings()), $expected_default_settings);
 
     // Keep the "CKEditor" editor selected and click the "Configure" button.
@@ -115,11 +115,11 @@ function testExistingFormat() {
     $this->assertFalse($editor, 'No Editor config entity exists yet.');
 
     // Ensure that drupalSettings is correct.
-    $ckeditor_settings_toolbar = array(
+    $ckeditor_settings_toolbar = [
       '#theme' => 'ckeditor_settings_toolbar',
       '#editor' => Editor::create(['editor' => 'ckeditor']),
       '#plugins' => $this->container->get('plugin.manager.ckeditor.plugin')->getButtons(),
-    );
+    ];
     $this->assertEqual(
       $this->drupalSettings['ckeditor']['toolbarAdmin'],
       $this->container->get('renderer')->renderPlain($ckeditor_settings_toolbar),
@@ -148,9 +148,9 @@ function testExistingFormat() {
 
     // Configure the Styles plugin, and ensure the updated settings are saved.
     $this->drupalGet('admin/config/content/formats/manage/filtered_html');
-    $edit = array(
+    $edit = [
       'editor[settings][plugins][stylescombo][styles]' => "h1.title|Title\np.callout|Callout\n\n",
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $expected_settings['plugins']['stylescombo']['styles'] = "h1.title|Title\np.callout|Callout\n\n";
     $editor = Editor::load('filtered_html');
@@ -161,13 +161,13 @@ function testExistingFormat() {
     // done via drag and drop, but here we can only emulate the end result of
     // that interaction). Test multiple toolbar rows and a divider within a row.
     $this->drupalGet('admin/config/content/formats/manage/filtered_html');
-    $expected_settings['toolbar']['rows'][0][] = array(
+    $expected_settings['toolbar']['rows'][0][] = [
       'name' => 'Action history',
-      'items' => array('Undo', '|', 'Redo', 'JustifyCenter'),
-    );
-    $edit = array(
+      'items' => ['Undo', '|', 'Redo', 'JustifyCenter'],
+    ];
+    $edit = [
       'editor[settings][toolbar][button_groups]' => json_encode($expected_settings['toolbar']['rows']),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $editor = Editor::load('filtered_html');
     $this->assertTrue($editor instanceof Editor, 'An Editor config entity exists.');
@@ -191,7 +191,7 @@ function testExistingFormat() {
 
     // Now enable the ckeditor_test module, which provides one configurable
     // CKEditor plugin — this should not affect the Editor config entity.
-    \Drupal::service('module_installer')->install(array('ckeditor_test'));
+    \Drupal::service('module_installer')->install(['ckeditor_test']);
     $this->resetAll();
     $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
     $this->drupalGet('admin/config/content/formats/manage/filtered_html');
@@ -203,9 +203,9 @@ function testExistingFormat() {
 
     // Finally, check the "Ultra llama mode" checkbox.
     $this->drupalGet('admin/config/content/formats/manage/filtered_html');
-    $edit = array(
+    $edit = [
       'editor[settings][plugins][llama_contextual_and_button][ultra_llama_mode]' => '1',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->drupalGet('admin/config/content/formats/manage/filtered_html');
     $ultra_llama_mode_checkbox = $this->xpath('//input[@type="checkbox" and @name="editor[settings][plugins][llama_contextual_and_button][ultra_llama_mode]" and @checked="checked"]');
@@ -239,11 +239,11 @@ function testNewFormat() {
 
     // Name our fancy new text format, select the "CKEditor" editor and click
     // the "Configure" button.
-    $edit = array(
+    $edit = [
       'name' => 'My amazing text format',
       'format' => 'amazing_format',
       'editor[editor]' => 'ckeditor',
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, 'editor_configure');
     $filter_format = FilterFormat::load('amazing_format');
     $this->assertFalse($filter_format, 'No FilterFormat config entity exists yet.');
diff --git a/core/modules/ckeditor/src/Tests/CKEditorLoadingTest.php b/core/modules/ckeditor/src/Tests/CKEditorLoadingTest.php
index 6efe647b5422d48b086462e32f0381d89ded5de6..6de5467533a0518e7d8b98648e806f29f2540b73 100644
--- a/core/modules/ckeditor/src/Tests/CKEditorLoadingTest.php
+++ b/core/modules/ckeditor/src/Tests/CKEditorLoadingTest.php
@@ -18,7 +18,7 @@ class CKEditorLoadingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'editor', 'ckeditor', 'node');
+  public static $modules = ['filter', 'editor', 'ckeditor', 'node'];
 
   /**
    * An untrusted user with access to only the 'plain_text' format.
@@ -38,12 +38,12 @@ protected function setUp() {
     parent::setUp();
 
     // Create text format, associate CKEditor.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $filtered_html_format->save();
     $editor = Editor::create([
       'format' => 'filtered_html',
@@ -53,22 +53,22 @@ protected function setUp() {
 
     // Create a second format without an associated editor so a drop down select
     // list is created when selecting formats.
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
       'weight' => 1,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $full_html_format->save();
 
     // Create node type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'article',
       'name' => 'Article',
-    ));
+    ]);
 
-    $this->untrustedUser = $this->drupalCreateUser(array('create article content', 'edit any article content'));
-    $this->normalUser = $this->drupalCreateUser(array('create article content', 'edit any article content', 'use text format filtered_html', 'use text format full_html'));
+    $this->untrustedUser = $this->drupalCreateUser(['create article content', 'edit any article content']);
+    $this->normalUser = $this->drupalCreateUser(['create article content', 'edit any article content', 'use text format filtered_html', 'use text format full_html']);
   }
 
   /**
@@ -101,13 +101,13 @@ function testLoading() {
     list($settings, $editor_settings_present, $editor_js_present, $body, $format_selector) = $this->getThingsToCheck();
     $ckeditor_plugin = $this->container->get('plugin.manager.editor')->createInstance('ckeditor');
     $editor = Editor::load('filtered_html');
-    $expected = array('formats' => array('filtered_html' => array(
+    $expected = ['formats' => ['filtered_html' => [
       'format' => 'filtered_html',
       'editor' => 'ckeditor',
       'editorSettings' => $this->castSafeStrings($ckeditor_plugin->getJSSettings($editor)),
       'editorSupportsContentFiltering' => TRUE,
       'isXssSafe' => FALSE,
-    )));
+    ]]];
     $this->assertTrue($editor_settings_present, "Text Editor module's JavaScript settings are on the page.");
     $this->assertIdentical($expected, $this->castSafeStrings($settings['editor']), "Text Editor module's JavaScript settings on the page are correct.");
     $this->assertTrue($editor_js_present, 'Text Editor JavaScript is present.');
@@ -122,7 +122,7 @@ function testLoading() {
     // NOTE: the tests in CKEditorTest already ensure that changing the
     // configuration also results in modified CKEditor configuration, so we
     // don't test that here.
-    \Drupal::service('module_installer')->install(array('ckeditor_test'));
+    \Drupal::service('module_installer')->install(['ckeditor_test']);
     $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
     $editor_settings = $editor->getSettings();
     $editor_settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
@@ -130,15 +130,15 @@ function testLoading() {
     $editor->save();
     $this->drupalGet('node/add/article');
     list($settings, $editor_settings_present, $editor_js_present, $body, $format_selector) = $this->getThingsToCheck();
-    $expected = array(
-      'formats' => array(
-        'filtered_html' => array(
+    $expected = [
+      'formats' => [
+        'filtered_html' => [
           'format' => 'filtered_html',
           'editor' => 'ckeditor',
           'editorSettings' => $this->castSafeStrings($ckeditor_plugin->getJSSettings($editor)),
           'editorSupportsContentFiltering' => TRUE,
           'isXssSafe' => FALSE,
-    )));
+    ]]];
     $this->assertTrue($editor_settings_present, "Text Editor module's JavaScript settings are on the page.");
     $this->assertIdentical($expected, $this->castSafeStrings($settings['editor']), "Text Editor module's JavaScript settings on the page are correct.");
     $this->assertTrue($editor_js_present, 'Text Editor JavaScript is present.');
@@ -226,7 +226,7 @@ function testExternalStylesheets() {
 
   protected function getThingsToCheck() {
     $settings = $this->getDrupalSettings();
-    return array(
+    return [
       // JavaScript settings.
       $settings,
       // Editor.module's JS settings present.
@@ -239,7 +239,7 @@ protected function getThingsToCheck() {
       $this->xpath('//textarea[@id="edit-body-0-value"]'),
       // Format selector.
       $this->xpath('//select[contains(@class, "filter-list")]'),
-    );
+    ];
   }
 
 }
diff --git a/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorPluginManagerTest.php b/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorPluginManagerTest.php
index 92c448b691cdb5794467f9635f699e3863c23246..fc79273487e091ce7223448e9cf24bbd9d76cce3 100644
--- a/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorPluginManagerTest.php
+++ b/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorPluginManagerTest.php
@@ -18,7 +18,7 @@ class CKEditorPluginManagerTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'filter', 'editor', 'ckeditor');
+  public static $modules = ['system', 'user', 'filter', 'editor', 'ckeditor'];
 
   /**
    * The manager for "CKEditor plugin" plugins.
@@ -33,12 +33,12 @@ protected function setUp() {
     // Install the Filter module.
 
     // Create text format, associate CKEditor.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $filtered_html_format->save();
     $editor = Editor::create([
       'format' => 'filtered_html',
@@ -57,27 +57,27 @@ function testEnabledPlugins() {
     // Case 1: no CKEditor plugins.
     $definitions = array_keys($this->manager->getDefinitions());
     sort($definitions);
-    $this->assertIdentical(array('drupalimage', 'drupalimagecaption', 'drupallink', 'internal', 'language', 'stylescombo'), $definitions, 'No CKEditor plugins found besides the built-in ones.');
-    $enabled_plugins = array(
+    $this->assertIdentical(['drupalimage', 'drupalimagecaption', 'drupallink', 'internal', 'language', 'stylescombo'], $definitions, 'No CKEditor plugins found besides the built-in ones.');
+    $enabled_plugins = [
       'drupalimage' => drupal_get_path('module', 'ckeditor') . '/js/plugins/drupalimage/plugin.js',
       'drupallink' => drupal_get_path('module', 'ckeditor') . '/js/plugins/drupallink/plugin.js',
-    );
+    ];
     $this->assertIdentical($enabled_plugins, $this->manager->getEnabledPluginFiles($editor), 'Only built-in plugins are enabled.');
-    $this->assertIdentical(array('internal' => NULL) + $enabled_plugins, $this->manager->getEnabledPluginFiles($editor, TRUE), 'Only the "internal" plugin is enabled.');
+    $this->assertIdentical(['internal' => NULL] + $enabled_plugins, $this->manager->getEnabledPluginFiles($editor, TRUE), 'Only the "internal" plugin is enabled.');
 
     // Enable the CKEditor Test module, which has the Llama plugin (plus four
     // variations of it, to cover all possible ways a plugin can be enabled) and
     // clear the editor manager's cache so it is picked up.
-    $this->enableModules(array('ckeditor_test'));
+    $this->enableModules(['ckeditor_test']);
     $this->manager = $this->container->get('plugin.manager.ckeditor.plugin');
     $this->manager->clearCachedDefinitions();
 
     // Case 2: CKEditor plugins are available.
     $plugin_ids = array_keys($this->manager->getDefinitions());
     sort($plugin_ids);
-    $this->assertIdentical(array('drupalimage', 'drupalimagecaption', 'drupallink', 'internal', 'language', 'llama', 'llama_button', 'llama_contextual', 'llama_contextual_and_button', 'llama_css', 'stylescombo'), $plugin_ids, 'Additional CKEditor plugins found.');
+    $this->assertIdentical(['drupalimage', 'drupalimagecaption', 'drupallink', 'internal', 'language', 'llama', 'llama_button', 'llama_contextual', 'llama_contextual_and_button', 'llama_css', 'stylescombo'], $plugin_ids, 'Additional CKEditor plugins found.');
     $this->assertIdentical($enabled_plugins, $this->manager->getEnabledPluginFiles($editor), 'Only the internal plugins are enabled.');
-    $this->assertIdentical(array('internal' => NULL) + $enabled_plugins, $this->manager->getEnabledPluginFiles($editor, TRUE), 'Only the "internal" plugin is enabled.');
+    $this->assertIdentical(['internal' => NULL] + $enabled_plugins, $this->manager->getEnabledPluginFiles($editor, TRUE), 'Only the "internal" plugin is enabled.');
 
     // Case 3: enable each of the newly available plugins, if possible:
     // a. Llama: cannot be enabled, since it does not implement
@@ -100,33 +100,33 @@ function testEnabledPlugins() {
     $settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
     $editor->setSettings($settings);
     $editor->save();
-    $file = array();
+    $file = [];
     $file['b'] = drupal_get_path('module', 'ckeditor_test') . '/js/llama_button.js';
     $file['c'] = drupal_get_path('module', 'ckeditor_test') . '/js/llama_contextual.js';
     $file['cb'] = drupal_get_path('module', 'ckeditor_test') . '/js/llama_contextual_and_button.js';
     $file['css'] = drupal_get_path('module', 'ckeditor_test') . '/js/llama_css.js';
-    $expected = $enabled_plugins + array('llama_button' => $file['b'], 'llama_contextual_and_button' => $file['cb']);
+    $expected = $enabled_plugins + ['llama_button' => $file['b'], 'llama_contextual_and_button' => $file['cb']];
     $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The LlamaButton and LlamaContextualAndButton plugins are enabled.');
-    $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LlamaButton and LlamaContextualAndButton plugins are enabled.');
+    $this->assertIdentical(['internal' => NULL] + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LlamaButton and LlamaContextualAndButton plugins are enabled.');
     $settings['toolbar'] = $original_toolbar;
     $settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
     $editor->setSettings($settings);
     $editor->save();
-    $expected = $enabled_plugins + array('llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb']);
+    $expected = $enabled_plugins + ['llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb']];
     $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The  LLamaContextual and LlamaContextualAndButton plugins are enabled.');
-    $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LlamaContextual and LlamaContextualAndButton plugins are enabled.');
+    $this->assertIdentical(['internal' => NULL] + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LlamaContextual and LlamaContextualAndButton plugins are enabled.');
     $settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
     $editor->setSettings($settings);
     $editor->save();
-    $expected = $enabled_plugins + array('llama_button' => $file['b'], 'llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb']);
+    $expected = $enabled_plugins + ['llama_button' => $file['b'], 'llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb']];
     $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The LlamaButton, LlamaContextual and LlamaContextualAndButton plugins are enabled.');
-    $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LLamaButton, LlamaContextual and LlamaContextualAndButton plugins are enabled.');
+    $this->assertIdentical(['internal' => NULL] + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LLamaButton, LlamaContextual and LlamaContextualAndButton plugins are enabled.');
     $settings['toolbar']['rows'][0][0]['items'][] = 'LlamaCSS';
     $editor->setSettings($settings);
     $editor->save();
-    $expected = $enabled_plugins + array('llama_button' => $file['b'], 'llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb'], 'llama_css' => $file['css']);
+    $expected = $enabled_plugins + ['llama_button' => $file['b'], 'llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb'], 'llama_css' => $file['css']];
     $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The LlamaButton, LlamaContextual, LlamaContextualAndButton and LlamaCSS plugins are enabled.');
-    $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LLamaButton, LlamaContextual, LlamaContextualAndButton and LlamaCSS plugins are enabled.');
+    $this->assertIdentical(['internal' => NULL] + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LLamaButton, LlamaContextual, LlamaContextualAndButton and LlamaCSS plugins are enabled.');
   }
 
   /**
@@ -137,11 +137,11 @@ function testCssFiles() {
     $editor = Editor::load('filtered_html');
 
     // Case 1: no CKEditor iframe instance CSS file.
-    $this->assertIdentical(array(), $this->manager->getCssFiles($editor), 'No iframe instance CSS file found.');
+    $this->assertIdentical([], $this->manager->getCssFiles($editor), 'No iframe instance CSS file found.');
 
     // Enable the CKEditor Test module, which has the LlamaCss plugin and
     // clear the editor manager's cache so it is picked up.
-    $this->enableModules(array('ckeditor_test'));
+    $this->enableModules(['ckeditor_test']);
     $this->manager = $this->container->get('plugin.manager.ckeditor.plugin');
     $settings = $editor->getSettings();
     // LlamaCss: automatically enabled by adding its 'LlamaCSS' button.
@@ -150,9 +150,9 @@ function testCssFiles() {
     $editor->save();
 
     // Case 2: CKEditor iframe instance CSS file.
-    $expected = array(
-      'llama_css' => array(drupal_get_path('module', 'ckeditor_test') . '/css/llama.css')
-    );
+    $expected = [
+      'llama_css' => [drupal_get_path('module', 'ckeditor_test') . '/css/llama.css']
+    ];
     $this->assertIdentical($expected, $this->manager->getCssFiles($editor), 'Iframe instance CSS file found.');
   }
 
diff --git a/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorTest.php b/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorTest.php
index 3711a54e3840120ea9263545bb2c6deb2436cfa8..9e159c3d519f0d3d6795e8f56e8a6d16c7a8bb39 100644
--- a/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorTest.php
+++ b/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorTest.php
@@ -19,7 +19,7 @@ class CKEditorTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'filter', 'editor', 'ckeditor', 'filter_test');
+  public static $modules = ['system', 'user', 'filter', 'editor', 'ckeditor', 'filter_test'];
 
   /**
    * An instance of the "CKEditor" text editor plugin.
@@ -41,19 +41,19 @@ protected function setUp() {
     // Install the Filter module.
 
     // Create text format, associate CKEditor.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(
-        'filter_html' => array(
+      'filters' => [
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<h2 id> <h3> <h4> <h5> <h6> <p> <br> <strong> <a href hreflang>',
-          )
-        ),
-      ),
-    ));
+          ]
+        ],
+      ],
+    ]);
     $filtered_html_format->save();
     $editor = Editor::create([
       'format' => 'filtered_html',
@@ -72,7 +72,7 @@ function testGetJSSettings() {
     $editor = Editor::load('filtered_html');
 
     // Default toolbar.
-    $expected_config = $this->getDefaultInternalConfig() + array(
+    $expected_config = $this->getDefaultInternalConfig() + [
       'drupalImage_dialogTitleAdd' => 'Insert Image',
       'drupalImage_dialogTitleEdit' => 'Edit Image',
       'drupalLink_dialogTitleAdd' => 'Add Link',
@@ -84,11 +84,11 @@ function testGetJSSettings() {
       'extraPlugins' => 'drupalimage,drupallink',
       'language' => 'en',
       'stylesSet' => FALSE,
-      'drupalExternalPlugins' => array(
+      'drupalExternalPlugins' => [
         'drupalimage' => file_url_transform_relative(file_create_url('core/modules/ckeditor/js/plugins/drupalimage/plugin.js')),
         'drupallink' => file_url_transform_relative(file_create_url('core/modules/ckeditor/js/plugins/drupallink/plugin.js')),
-      ),
-    );
+      ],
+    ];
     $expected_config = $this->castSafeStrings($expected_config);
     ksort($expected_config);
     ksort($expected_config['allowedContent']);
@@ -96,7 +96,7 @@ function testGetJSSettings() {
 
     // Customize the configuration: add button, have two contextually enabled
     // buttons, and configure a CKEditor plugin setting.
-    $this->enableModules(array('ckeditor_test'));
+    $this->enableModules(['ckeditor_test']);
     $this->container->get('plugin.manager.editor')->clearCachedDefinitions();
     $this->ckeditor = $this->container->get('plugin.manager.editor')->createInstance('ckeditor');
     $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
@@ -121,16 +121,16 @@ function testGetJSSettings() {
     $format->filters('filter_html')->settings['allowed_html'] .= '<pre class> <h1> <blockquote class="*"> <address class="foo bar-* *">';
     $format->save();
 
-    $expected_config['allowedContent']['pre'] = array('attributes' => 'class', 'styles' => FALSE, 'classes' => TRUE);
-    $expected_config['allowedContent']['h1'] = array('attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE);
-    $expected_config['allowedContent']['blockquote'] = array('attributes' => 'class', 'styles' => FALSE, 'classes' => TRUE);
-    $expected_config['allowedContent']['address'] = array('attributes' => 'class', 'styles' => FALSE, 'classes' => 'foo,bar-*');
+    $expected_config['allowedContent']['pre'] = ['attributes' => 'class', 'styles' => FALSE, 'classes' => TRUE];
+    $expected_config['allowedContent']['h1'] = ['attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE];
+    $expected_config['allowedContent']['blockquote'] = ['attributes' => 'class', 'styles' => FALSE, 'classes' => TRUE];
+    $expected_config['allowedContent']['address'] = ['attributes' => 'class', 'styles' => FALSE, 'classes' => 'foo,bar-*'];
     $expected_config['format_tags'] = 'p;h1;h2;h3;h4;h5;h6;pre';
     ksort($expected_config['allowedContent']);
     $this->assertIdentical($expected_config, $this->castSafeStrings($this->ckeditor->getJSSettings($editor)), 'Generated JS settings are correct for customized configuration.');
 
     // Disable the filter_html filter: allow *all *tags.
-    $format->setFilterConfig('filter_html', array('status' => 0));
+    $format->setFilterConfig('filter_html', ['status' => 0]);
     $format->save();
 
     $expected_config['allowedContent'] = TRUE;
@@ -139,73 +139,73 @@ function testGetJSSettings() {
     $this->assertIdentical($expected_config, $this->castSafeStrings($this->ckeditor->getJSSettings($editor)), 'Generated JS settings are correct for customized configuration.');
 
     // Enable the filter_test_restrict_tags_and_attributes filter.
-    $format->setFilterConfig('filter_test_restrict_tags_and_attributes', array(
+    $format->setFilterConfig('filter_test_restrict_tags_and_attributes', [
       'status' => 1,
-      'settings' => array(
-        'restrictions' => array(
-          'allowed' => array(
+      'settings' => [
+        'restrictions' => [
+          'allowed' => [
             'p' => TRUE,
-            'a' => array(
+            'a' => [
               'href' => TRUE,
-              'rel' => array('nofollow' => TRUE),
-              'class' => array('external' => TRUE),
-              'target' => array('_blank' => FALSE),
-            ),
-            'span' => array(
-              'class' => array('dodo' => FALSE),
-              'property' => array('dc:*' => TRUE),
-              'rel' => array('foaf:*' => FALSE),
-              'style' => array('underline' => FALSE, 'color' => FALSE, 'font-size' => TRUE),
-            ),
-            '*' => array(
+              'rel' => ['nofollow' => TRUE],
+              'class' => ['external' => TRUE],
+              'target' => ['_blank' => FALSE],
+            ],
+            'span' => [
+              'class' => ['dodo' => FALSE],
+              'property' => ['dc:*' => TRUE],
+              'rel' => ['foaf:*' => FALSE],
+              'style' => ['underline' => FALSE, 'color' => FALSE, 'font-size' => TRUE],
+            ],
+            '*' => [
               'style' => FALSE,
               'on*' => FALSE,
-              'class' => array('is-a-hipster-llama' => TRUE, 'and-more' => TRUE),
+              'class' => ['is-a-hipster-llama' => TRUE, 'and-more' => TRUE],
               'data-*' => TRUE,
-            ),
+            ],
             'del' => FALSE,
-          ),
-        ),
-      ),
-    ));
+          ],
+        ],
+      ],
+    ]);
     $format->save();
 
-    $expected_config['allowedContent'] = array(
-      'p' => array(
+    $expected_config['allowedContent'] = [
+      'p' => [
         'attributes' => TRUE,
         'styles' => FALSE,
         'classes' => 'is-a-hipster-llama,and-more',
-      ),
-      'a' => array(
+      ],
+      'a' => [
         'attributes' => 'href,rel,class,target',
         'styles' => FALSE,
         'classes' => 'external',
-      ),
-      'span' => array(
+      ],
+      'span' => [
         'attributes' => 'class,property,rel,style',
         'styles' => 'font-size',
         'classes' => FALSE,
-      ),
-      '*' => array(
+      ],
+      '*' => [
         'attributes' => 'class,data-*',
         'styles' => FALSE,
         'classes' => 'is-a-hipster-llama,and-more',
-      ),
-      'del' => array(
+      ],
+      'del' => [
         'attributes' => FALSE,
         'styles' => FALSE,
         'classes' => FALSE,
-      ),
-    );
-    $expected_config['disallowedContent'] = array(
-      'span' => array(
+      ],
+    ];
+    $expected_config['disallowedContent'] = [
+      'span' => [
         'styles' => 'underline,color',
         'classes' => 'dodo',
-      ),
-      '*' => array(
+      ],
+      '*' => [
         'attributes' => 'on*',
-      ),
-    );
+      ],
+    ];
     $expected_config['format_tags'] = 'p';
     ksort($expected_config);
     ksort($expected_config['allowedContent']);
@@ -232,7 +232,7 @@ function testBuildToolbarJSSetting() {
     $this->assertIdentical($expected, $this->castSafeStrings($this->ckeditor->buildToolbarJSSetting($editor)), '"toolbar" configuration part of JS settings built correctly for customized toolbar.');
 
     // Enable the editor_test module, customize further.
-    $this->enableModules(array('ckeditor_test'));
+    $this->enableModules(['ckeditor_test']);
     $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
     // Override the label of a toolbar component.
     $settings['toolbar']['rows'][0][0]['name'] = 'JunkScience';
@@ -255,7 +255,7 @@ function testBuildContentsCssJSSetting() {
     $this->assertIdentical($expected, $this->ckeditor->buildContentsCssJSSetting($editor), '"contentsCss" configuration part of JS settings built correctly for default toolbar.');
 
     // Enable the editor_test module, which implements hook_ckeditor_css_alter().
-    $this->enableModules(array('ckeditor_test'));
+    $this->enableModules(['ckeditor_test']);
     $expected[] = file_url_transform_relative(file_create_url(drupal_get_path('module', 'ckeditor_test') . '/ckeditor_test.css'));
     $this->assertIdentical($expected, $this->ckeditor->buildContentsCssJSSetting($editor), '"contentsCss" configuration part of JS settings built correctly while a hook_ckeditor_css_alter() implementation exists.');
 
@@ -315,7 +315,7 @@ function testStylesComboGetConfig() {
     $settings['plugins']['stylescombo']['styles'] = '';
     $editor->setSettings($settings);
     $editor->save();
-    $expected['stylesSet'] = array();
+    $expected['stylesSet'] = [];
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
 
     // Configure the optional "styles" setting in odd ways that shouldn't affect
@@ -333,10 +333,10 @@ function testStylesComboGetConfig() {
     $settings['plugins']['stylescombo']['styles'] = "h1.title|Title\np.mAgical.Callout|Callout";
     $editor->setSettings($settings);
     $editor->save();
-    $expected['stylesSet'] = array(
-      array('name' => 'Title', 'element' => 'h1', 'attributes' => array('class' => 'title')),
-      array('name' => 'Callout', 'element' => 'p', 'attributes' => array('class' => 'mAgical Callout')),
-    );
+    $expected['stylesSet'] = [
+      ['name' => 'Title', 'element' => 'h1', 'attributes' => ['class' => 'title']],
+      ['name' => 'Callout', 'element' => 'p', 'attributes' => ['class' => 'mAgical Callout']],
+    ];
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
 
     // Same configuration, but now interspersed with nonsense. Should yield the
@@ -350,7 +350,7 @@ function testStylesComboGetConfig() {
     $settings['plugins']['stylescombo']['styles'] = "      h1 |  Title ";
     $editor->setSettings($settings);
     $editor->save();
-    $expected['stylesSet'] = array(array('name' => 'Title', 'element' => 'h1'));
+    $expected['stylesSet'] = [['name' => 'Title', 'element' => 'h1']];
     $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
 
     // Invalid syntax should cause stylesSet to be set to FALSE.
@@ -366,8 +366,8 @@ function testStylesComboGetConfig() {
    */
   function testLanguages() {
     // Get CKEditor supported language codes and spot-check.
-    $this->enableModules(array('language'));
-    $this->installConfig(array('language'));
+    $this->enableModules(['language']);
+    $this->installConfig(['language']);
     $langcodes = $this->ckeditor->getLangcodes();
 
     // Language codes transformed with browser mappings.
@@ -390,14 +390,14 @@ function testLanguages() {
    * Tests that CKEditor plugins participate in JS translation.
    */
   function testJSTranslation() {
-    $this->enableModules(array('language', 'locale'));
+    $this->enableModules(['language', 'locale']);
     $this->installSchema('locale', 'locales_source');
     $this->installSchema('locale', 'locales_location');
     $this->installSchema('locale', 'locales_target');
     $editor = Editor::load('filtered_html');
     $this->ckeditor->getJSSettings($editor);
     $localeStorage = $this->container->get('locale.storage');
-    $string = $localeStorage->findString(array('source' => 'Edit Link', 'context' => ''));
+    $string = $localeStorage->findString(['source' => 'Edit Link', 'context' => '']);
     $this->assertTrue(!empty($string), 'String from JavaScript file saved.');
 
     // With locale module, CKEditor should not adhere to the language selected.
@@ -428,14 +428,14 @@ protected function assertCKEditorLanguage($langcode = 'fr') {
   }
 
   protected function getDefaultInternalConfig() {
-    return array(
+    return [
       'customConfig' => '',
       'pasteFromWordPromptCleanup' => TRUE,
       'resize_dir' => 'vertical',
-      'justifyClasses' => array('text-align-left', 'text-align-center', 'text-align-right', 'text-align-justify'),
+      'justifyClasses' => ['text-align-left', 'text-align-center', 'text-align-right', 'text-align-justify'],
       'entities' => FALSE,
       'disableNativeSpellChecker' => FALSE,
-    );
+    ];
   }
 
   protected function getDefaultAllowedContentConfig() {
@@ -454,42 +454,42 @@ protected function getDefaultAllowedContentConfig() {
   }
 
   protected function getDefaultDisallowedContentConfig() {
-    return array(
-      '*' => array('attributes' => 'on*'),
-    );
+    return [
+      '*' => ['attributes' => 'on*'],
+    ];
   }
 
   protected function getDefaultToolbarConfig() {
-    return array(
-      array(
+    return [
+      [
         'name' => 'Formatting',
-        'items' => array('Bold', 'Italic',),
-      ),
-      array(
+        'items' => ['Bold', 'Italic',],
+      ],
+      [
         'name' => 'Links',
-        'items' => array('DrupalLink', 'DrupalUnlink',),
-      ),
-      array(
+        'items' => ['DrupalLink', 'DrupalUnlink',],
+      ],
+      [
         'name' => 'Lists',
-        'items' => array('BulletedList', 'NumberedList',),
-      ),
-      array(
+        'items' => ['BulletedList', 'NumberedList',],
+      ],
+      [
         'name' => 'Media',
-        'items' => array('Blockquote', 'DrupalImage',),
-      ),
-      array(
+        'items' => ['Blockquote', 'DrupalImage',],
+      ],
+      [
         'name' => 'Tools',
-        'items' => array('Source',),
-      ),
+        'items' => ['Source',],
+      ],
       '/',
-    );
+    ];
   }
 
   protected function getDefaultContentsCssConfig() {
-    return array(
+    return [
       file_url_transform_relative(file_create_url('core/modules/ckeditor/css/ckeditor-iframe.css')),
       file_url_transform_relative(file_create_url('core/modules/system/css/components/align.module.css')),
-    );
+    ];
   }
 
 }
diff --git a/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/Llama.php b/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/Llama.php
index 932b05ca4d61975062565e47f22c676b0aefea42..012579de89de552970cf7e61f0645076b720560f 100644
--- a/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/Llama.php
+++ b/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/Llama.php
@@ -30,14 +30,14 @@ class Llama extends PluginBase implements CKEditorPluginInterface {
    * {@inheritdoc}
    */
   function getDependencies(Editor $editor) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   function getLibraries(Editor $editor) {
-    return array();
+    return [];
   }
 
   /**
@@ -58,7 +58,7 @@ function getFile() {
    * {@inheritdoc}
    */
   public function getConfig(Editor $editor) {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaButton.php b/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaButton.php
index 7520dfd1176467873979a0649c42ac1caa91caa7..4568192e03dd535f32d61b9b7e1b530ba8aa4a5a 100644
--- a/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaButton.php
+++ b/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaButton.php
@@ -18,11 +18,11 @@ class LlamaButton extends Llama implements CKEditorPluginButtonsInterface {
    * {@inheritdoc}
    */
   function getButtons() {
-    return array(
-      'Llama' => array(
+    return [
+      'Llama' => [
         'label' => t('Insert Llama'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaContextualAndButton.php b/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaContextualAndButton.php
index 43060d90468be1c443adfbc2ed3f163a91c00be3..5e1955fbd302fab440c7f025189e9b8e994fe8b9 100644
--- a/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaContextualAndButton.php
+++ b/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaContextualAndButton.php
@@ -39,11 +39,11 @@ function isEnabled(Editor $editor) {
    * {@inheritdoc}
    */
   function getButtons() {
-    return array(
-      'Llama' => array(
+    return [
+      'Llama' => [
         'label' => t('Insert Llama'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -58,17 +58,17 @@ function getFile() {
    */
   function settingsForm(array $form, FormStateInterface $form_state, Editor $editor) {
     // Defaults.
-    $config = array('ultra_llama_mode' => FALSE);
+    $config = ['ultra_llama_mode' => FALSE];
     $settings = $editor->getSettings();
     if (isset($settings['plugins']['llama_contextual_and_button'])) {
       $config = $settings['plugins']['llama_contextual_and_button'];
     }
 
-    $form['ultra_llama_mode'] = array(
+    $form['ultra_llama_mode'] = [
       '#title' => t('Ultra llama mode'),
       '#type' => 'checkbox',
       '#default_value' => $config['ultra_llama_mode'],
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaCss.php b/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaCss.php
index 294b39c92a4ff32a28afbfc9c27d191346087726..d3b9a7f6235cdbf4d4ab6a6b85c01775084174bd 100644
--- a/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaCss.php
+++ b/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaCss.php
@@ -20,20 +20,20 @@ class LlamaCss extends Llama implements CKEditorPluginButtonsInterface, CKEditor
    * {@inheritdoc}
    */
   function getButtons() {
-    return array(
-      'LlamaCSS' => array(
+    return [
+      'LlamaCSS' => [
         'label' => t('Insert Llama CSS'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   function getCssFiles(Editor $editor) {
-    return array(
+    return [
       drupal_get_path('module', 'ckeditor_test') . '/css/llama.css'
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/color/color.install b/core/modules/color/color.install
index 7f6133819debf83d9623dbc4fea8367dcc5b8ff3..3cc098caa05b674160338ae5371a31fae8e87ed0 100644
--- a/core/modules/color/color.install
+++ b/core/modules/color/color.install
@@ -9,15 +9,15 @@
  * Implements hook_requirements().
  */
 function color_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
 
   if ($phase == 'runtime') {
     // Check for the PHP GD library.
     if (function_exists('imagegd2')) {
       $info = gd_info();
-      $requirements['color_gd'] = array(
+      $requirements['color_gd'] = [
         'value' => $info['GD Version'],
-      );
+      ];
 
       // Check for PNG support.
       if (!function_exists('imagecreatefrompng')) {
@@ -26,11 +26,11 @@ function color_requirements($phase) {
       }
     }
     else {
-      $requirements['color_gd'] = array(
+      $requirements['color_gd'] = [
         'value' => t('Not installed'),
         'severity' => REQUIREMENT_ERROR,
         'description' => t('The GD library for PHP is missing or outdated. Check the <a href="http://php.net/manual/book.image.php">PHP image documentation</a> for information on how to correct this.'),
-      );
+      ];
     }
     $requirements['color_gd']['title'] = t('GD library PNG support');
   }
diff --git a/core/modules/color/color.module b/core/modules/color/color.module
index 3cae04532e7627b41b283d2cb6c683d7c2edd733..20d099abcf2cc370ffd263b5eff7a3b0decac8b2 100644
--- a/core/modules/color/color.module
+++ b/core/modules/color/color.module
@@ -23,11 +23,11 @@ function color_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.color':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Color module allows users with the <em>Administer site configuration</em> permission to change the color scheme (color of links, backgrounds, text, and other theme elements) of compatible themes. For more information, see the <a href=":color_do">online documentation for the Color module</a>.', array(':color_do' => 'https://www.drupal.org/documentation/modules/color')) . '</p>';
+      $output .= '<p>' . t('The Color module allows users with the <em>Administer site configuration</em> permission to change the color scheme (color of links, backgrounds, text, and other theme elements) of compatible themes. For more information, see the <a href=":color_do">online documentation for the Color module</a>.', [':color_do' => 'https://www.drupal.org/documentation/modules/color']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Changing colors') . '</dt>';
-      $output .= '<dd><p>' . t('To change the color settings, select the <em>Settings</em> link for your theme on the <a href=":appearance">Appearance</a> page. If the color picker does not appear then the theme is not compatible with the Color module.', array(':appearance' => \Drupal::url('system.themes_page'))) . '</p>';
+      $output .= '<dd><p>' . t('To change the color settings, select the <em>Settings</em> link for your theme on the <a href=":appearance">Appearance</a> page. If the color picker does not appear then the theme is not compatible with the Color module.', [':appearance' => \Drupal::url('system.themes_page')]) . '</p>';
       $output .= '<p>' . t('The Color module saves a modified copy of the theme\'s specified stylesheets in the files directory. If you make any manual changes to your theme\'s stylesheet, <em>you must save your color settings again, even if you haven\'t changed the colors</em>. This step is required because the module stylesheets in the files directory need to be recreated to reflect your changes.') . '</p></dd>';
       $output .= '</dl>';
       return $output;
@@ -38,11 +38,11 @@ function color_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function color_theme() {
-  return array(
-    'color_scheme_form' => array(
+  return [
+    'color_scheme_form' => [
       'render element' => 'form',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -51,14 +51,14 @@ function color_theme() {
 function color_form_system_theme_settings_alter(&$form, FormStateInterface $form_state) {
   $build_info = $form_state->getBuildInfo();
   if (isset($build_info['args'][0]) && ($theme = $build_info['args'][0]) && color_get_info($theme) && function_exists('gd_info')) {
-    $form['color'] = array(
+    $form['color'] = [
       '#type' => 'details',
       '#title' => t('Color scheme'),
       '#open' => TRUE,
       '#weight' => -1,
-      '#attributes' => array('id' => 'color_scheme_form'),
+      '#attributes' => ['id' => 'color_scheme_form'],
       '#theme' => 'color_scheme_form',
-    );
+    ];
     $form['color'] += color_scheme_form($form, $form_state, $theme);
     $form['#validate'][] = 'color_scheme_form_validate';
     // Ensure color submission happens first so we can unset extra values.
@@ -137,7 +137,7 @@ function color_block_view_pre_render(array $build) {
  * Retrieves the Color module information for a particular theme.
  */
 function color_get_info($theme) {
-  static $theme_info = array();
+  static $theme_info = [];
 
   if (isset($theme_info[$theme])) {
     return $theme_info[$theme];
@@ -148,21 +148,21 @@ function color_get_info($theme) {
   if ($path && file_exists($file)) {
     include $file;
     // Add in default values.
-    $info += array(
+    $info += [
       // CSS files (excluding @import) to rewrite with new color scheme.
-      'css' => array(),
+      'css' => [],
       // Files to copy.
-      'copy' => array(),
+      'copy' => [],
       // Gradient definitions.
-      'gradients' => array(),
+      'gradients' => [],
       // Color areas to fill (x, y, width, height).
-      'fill' => array(),
+      'fill' => [],
       // Coordinates of all the theme slices (x, y, width, height) with their
       // filename as used in the stylesheet.
-      'slices' => array(),
+      'slices' => [],
       // Reference color used for blending.
       'blend_target' => '#ffffff',
-    );
+    ];
     $theme_info[$theme] = $info;
     return $info;
   }
@@ -200,9 +200,9 @@ function color_get_palette($theme, $default = FALSE) {
 function color_scheme_form($complete_form, FormStateInterface $form_state, $theme) {
   $info = color_get_info($theme);
 
-  $info['schemes'][''] = array('title' => t('Custom'), 'colors' => array());
-  $color_sets = array();
-  $schemes = array();
+  $info['schemes'][''] = ['title' => t('Custom'), 'colors' => []];
+  $color_sets = [];
+  $schemes = [];
   foreach ($info['schemes'] as $key => $scheme) {
     $color_sets[$key] = $scheme['title'];
     $schemes[$key] = $scheme['colors'];
@@ -233,16 +233,16 @@ function color_scheme_form($complete_form, FormStateInterface $form_state, $them
 
   // Add scheme selector.
   $default_palette = color_get_palette($theme, TRUE);
-  $form['scheme'] = array(
+  $form['scheme'] = [
     '#type' => 'select',
     '#title' => t('Color set'),
     '#options' => $color_sets,
     '#default_value' => $scheme_name,
-    '#attached' => array(
-      'library' => array(
+    '#attached' => [
+      'library' => [
         'color/drupal.color',
         'color/admin',
-      ),
+      ],
       // Add custom JavaScript.
       'drupalSettings' => [
         'color' => [
@@ -251,8 +251,8 @@ function color_scheme_form($complete_form, FormStateInterface $form_state, $them
         ],
         'gradients' => $info['gradients'],
       ],
-    ),
-  );
+    ],
+  ];
 
   // Add palette fields. Use the configuration if available.
   $palette = $current_scheme ?: $default_palette;
@@ -260,22 +260,22 @@ function color_scheme_form($complete_form, FormStateInterface $form_state, $them
   $form['palette']['#tree'] = TRUE;
   foreach ($palette as $name => $value) {
     if (isset($names[$name])) {
-      $form['palette'][$name] = array(
+      $form['palette'][$name] = [
         '#type' => 'textfield',
         '#title' => $names[$name],
         '#value_callback' => 'color_palette_color_value',
         '#default_value' => $value,
         '#size' => 8,
-        '#attributes' => array('dir' => LanguageInterface::DIRECTION_LTR),
-      );
+        '#attributes' => ['dir' => LanguageInterface::DIRECTION_LTR],
+      ];
     }
   }
-  $form['theme'] = array('#type' => 'value', '#value' => $theme);
+  $form['theme'] = ['#type' => 'value', '#value' => $theme];
   if (isset($info['#attached'])) {
     $form['#attached'] = $info['#attached'];
     unset($info['#attached']);
   }
-  $form['info'] = array('#type' => 'value', '#value' => $info);
+  $form['info'] = ['#type' => 'value', '#value' => $info];
 
   return $form;
 }
@@ -360,7 +360,7 @@ function color_scheme_form_validate($form, FormStateInterface $form_state) {
   // Only accept hexadecimal CSS color strings to avoid XSS upon use.
   foreach ($form_state->getValue('palette') as $key => $color) {
     if (!color_valid_hexadecimal_string($color)) {
-      $form_state->setErrorByName('palette][' . $key, t('You must enter a valid hexadecimal color value for %name.', array('%name' => $form['color']['palette'][$key]['#title'])));
+      $form_state->setErrorByName('palette][' . $key, t('You must enter a valid hexadecimal color value for %name.', ['%name' => $form['color']['palette'][$key]['#title']]));
     }
   }
 }
@@ -373,7 +373,7 @@ function color_scheme_form_validate($form, FormStateInterface $form_state) {
 function color_scheme_form_submit($form, FormStateInterface $form_state) {
 
   // Avoid color settings spilling over to theme settings.
-  $color_settings = array('theme', 'palette', 'scheme');
+  $color_settings = ['theme', 'palette', 'scheme'];
   if ($form_state->hasValue('info')) {
     $color_settings[] = 'info';
   }
@@ -414,7 +414,7 @@ function color_scheme_form_submit($form, FormStateInterface $form_state) {
     $memory_limit = ini_get('memory_limit');
     $size = Bytes::toInt($memory_limit);
     if (!Environment::checkMemoryLimit($usage + $required, $memory_limit)) {
-      drupal_set_message(t('There is not enough memory available to PHP to change this theme\'s color scheme. You need at least %size more. Check the <a href="http://php.net/manual/ini.core.php#ini.sect.resource-limits">PHP documentation</a> for more information.', array('%size' => format_size($usage + $required - $size))), 'error');
+      drupal_set_message(t('There is not enough memory available to PHP to change this theme\'s color scheme. You need at least %size more. Check the <a href="http://php.net/manual/ini.core.php#ini.sect.resource-limits">PHP documentation</a> for more information.', ['%size' => format_size($usage + $required - $size)]), 'error');
       return;
     }
   }
@@ -446,7 +446,7 @@ function color_scheme_form_submit($form, FormStateInterface $form_state) {
   $paths['target'] = $paths['target'] . '/';
   $paths['id'] = $id;
   $paths['source'] = drupal_get_path('theme', $theme) . '/';
-  $paths['files'] = $paths['map'] = array();
+  $paths['files'] = $paths['map'] = [];
 
   // Save palette and logo location.
   $config
@@ -469,10 +469,10 @@ function color_scheme_form_submit($form, FormStateInterface $form_state) {
   }
 
   // Rewrite theme stylesheets.
-  $css = array();
+  $css = [];
   foreach ($info['css'] as $stylesheet) {
     // Build a temporary array with CSS files.
-    $files = array();
+    $files = [];
     if (file_exists($paths['source'] . $stylesheet)) {
       $files[] = $stylesheet;
     }
@@ -489,7 +489,7 @@ function color_scheme_form_submit($form, FormStateInterface $form_state) {
       $css_optimizer->rewriteFileURIBasePath = base_path() . dirname($paths['source'] . $file) . '/';
 
       // Prefix all paths within this CSS file, ignoring absolute paths.
-      $style = preg_replace_callback('/url\([\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\)/i', array($css_optimizer, 'rewriteFileURI'), $style);
+      $style = preg_replace_callback('/url\([\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\)/i', [$css_optimizer, 'rewriteFileURI'], $style);
 
       // Rewrite stylesheet with new colors.
       $style = _color_rewrite_stylesheet($theme, $info, $paths, $palette, $style);
@@ -729,7 +729,7 @@ function _color_shift($given, $ref1, $ref2, $target) {
  * Converts a hex triplet into a GD color.
  */
 function _color_gd($img, $hex) {
-  $c = array_merge(array($img), _color_unpack($hex));
+  $c = array_merge([$img], _color_unpack($hex));
   return call_user_func_array('imagecolorallocate', $c);
 }
 
@@ -739,7 +739,7 @@ function _color_gd($img, $hex) {
 function _color_blend($img, $hex1, $hex2, $alpha) {
   $in1 = _color_unpack($hex1);
   $in2 = _color_unpack($hex2);
-  $out = array($img);
+  $out = [$img];
   for ($i = 0; $i < 3; ++$i) {
     $out[] = $in1[$i] + ($in2[$i] - $in1[$i]) * $alpha;
   }
@@ -784,11 +784,11 @@ function _color_hsl2rgb($hsl) {
   $m2 = ($l <= 0.5) ? $l * ($s + 1) : $l + $s - $l * $s;
   $m1 = $l * 2 - $m2;
 
-  return array(
+  return [
     _color_hue2rgb($m1, $m2, $h + 0.33333),
     _color_hue2rgb($m1, $m2, $h),
     _color_hue2rgb($m1, $m2, $h - 0.33333),
-  );
+  ];
 }
 
 /**
@@ -828,5 +828,5 @@ function _color_rgb2hsl($rgb) {
     $h /= 6;
   }
 
-  return array($h, $s, $l);
+  return [$h, $s, $l];
 }
diff --git a/core/modules/color/tests/modules/color_test/themes/color_test_theme/color/color.inc b/core/modules/color/tests/modules/color_test/themes/color_test_theme/color/color.inc
index b88e8eae72be32bd288d616af8d6710d62474dfc..ee77a5a1736e4dbb6777b77d5a6a4889a1840b11 100644
--- a/core/modules/color/tests/modules/color_test/themes/color_test_theme/color/color.inc
+++ b/core/modules/color/tests/modules/color_test/themes/color_test_theme/color/color.inc
@@ -5,29 +5,29 @@
  * Lists available colors and color schemes for the Color test theme.
  */
 
-$info = array(
-  'fields' => array(
+$info = [
+  'fields' => [
     'bg' => t('Main background'),
     'text' => t('Text color'),
-  ),
-  'schemes' => array(
-    'default' => array(
+  ],
+  'schemes' => [
+    'default' => [
       'title' => t('Default'),
-      'colors' => array(
+      'colors' => [
         'bg' => '#ff0000',
         'text' => '#0000ff',
-      ),
-    ),
-    'custom' => array(
+      ],
+    ],
+    'custom' => [
       'title' => t('Custom'),
-      'colors' => array(
+      'colors' => [
         'bg' => '#ff0000',
         'text' => '#3b3b3b',
-      ),
-    ),
-  ),
-  'css' => array(
+      ],
+    ],
+  ],
+  'css' => [
     'css/colors.css',
-  ),
+  ],
   'preview_html' => 'color/preview.html',
-);
+];
diff --git a/core/modules/color/tests/src/Functional/ColorConfigSchemaTest.php b/core/modules/color/tests/src/Functional/ColorConfigSchemaTest.php
index 157deb8dc08e7b9d0adc76785939ef49b860f1f6..e55275deb78fbc01f7c4ef64914d104d582a0a4d 100644
--- a/core/modules/color/tests/src/Functional/ColorConfigSchemaTest.php
+++ b/core/modules/color/tests/src/Functional/ColorConfigSchemaTest.php
@@ -16,7 +16,7 @@ class ColorConfigSchemaTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('color');
+  public static $modules = ['color'];
 
   /**
    * A user with administrative permissions.
@@ -30,10 +30,10 @@ class ColorConfigSchemaTest extends BrowserTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('bartik'));
+    \Drupal::service('theme_handler')->install(['bartik']);
 
     // Create user.
-    $this->adminUser = $this->drupalCreateUser(array('administer themes'));
+    $this->adminUser = $this->drupalCreateUser(['administer themes']);
     $this->drupalLogin($this->adminUser);
   }
 
diff --git a/core/modules/color/tests/src/Functional/ColorTest.php b/core/modules/color/tests/src/Functional/ColorTest.php
index dc4456608ec07d07c0fe180cc37878d8911cecc5..8416913396deb5ec22ca8e1544f21e9d3699ed8e 100644
--- a/core/modules/color/tests/src/Functional/ColorTest.php
+++ b/core/modules/color/tests/src/Functional/ColorTest.php
@@ -17,7 +17,7 @@ class ColorTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('color', 'color_test', 'block', 'file');
+  public static $modules = ['color', 'color_test', 'block', 'file'];
 
   /**
    * A user with administrative permissions.
@@ -50,25 +50,25 @@ protected function setUp() {
     parent::setUp();
 
     // Create user.
-    $this->bigUser = $this->drupalCreateUser(array('administer themes'));
+    $this->bigUser = $this->drupalCreateUser(['administer themes']);
 
     // This tests the color module in Bartik.
-    $this->themes = array(
-      'bartik' => array(
+    $this->themes = [
+      'bartik' => [
         'palette_input' => 'palette[bg]',
         'scheme' => 'slate',
         'scheme_color' => '#3b3b3b',
-      ),
-      'color_test_theme' => array(
+      ],
+      'color_test_theme' => [
         'palette_input' => 'palette[bg]',
         'scheme' => 'custom',
         'scheme_color' => '#3b3b3b',
-      ),
-    );
+      ],
+    ];
     \Drupal::service('theme_handler')->install(array_keys($this->themes));
 
     // Array filled with valid and not valid color values.
-    $this->colorTests = array(
+    $this->colorTests = [
       '#000' => TRUE,
       '#123456' => TRUE,
       '#abcdef' => TRUE,
@@ -78,7 +78,7 @@ protected function setUp() {
       '#00000' => FALSE,
       '123456' => FALSE,
       '#00000g' => FALSE,
-    );
+    ];
   }
 
   /**
@@ -138,7 +138,7 @@ function _testColor($theme, $test_values) {
     $config->set('css.preprocess', 1);
     $config->save();
     $this->drupalGet('<front>');
-    $stylesheets = \Drupal::state()->get('drupal_css_cache_files') ?: array();
+    $stylesheets = \Drupal::state()->get('drupal_css_cache_files') ?: [];
     $stylesheet_content = '';
     foreach ($stylesheets as $uri) {
       $stylesheet_content .= join("\n", file(drupal_realpath($uri)));
@@ -178,10 +178,10 @@ function testValidColor() {
    */
   function testLogoSettingOverride() {
     $this->drupalLogin($this->bigUser);
-    $edit = array(
+    $edit = [
       'default_logo' => FALSE,
       'logo_path' => 'core/misc/druplicon.png',
-    );
+    ];
     $this->drupalPostForm('admin/appearance/settings', $edit, t('Save configuration'));
 
     // Ensure that the overridden logo is present in Bartik, which is colorable.
diff --git a/core/modules/comment/comment.api.php b/core/modules/comment/comment.api.php
index 7b922cbcc06540f0c97eee6b4ef11509afef6881..ec6b4ce8ef1d244e65e603b6b852ff179fd78d4d 100644
--- a/core/modules/comment/comment.api.php
+++ b/core/modules/comment/comment.api.php
@@ -31,16 +31,16 @@
  * @see \Drupal\comment\CommentViewBuilder::buildLinks()
  */
 function hook_comment_links_alter(array &$links, CommentInterface $entity, array &$context) {
-  $links['mymodule'] = array(
+  $links['mymodule'] = [
     '#theme' => 'links__comment__mymodule',
-    '#attributes' => array('class' => array('links', 'inline')),
-    '#links' => array(
-      'comment-report' => array(
+    '#attributes' => ['class' => ['links', 'inline']],
+    '#links' => [
+      'comment-report' => [
         'title' => t('Report'),
         'url' => Url::fromRoute('comment_test.report', ['comment' => $entity->id()], ['query' => ['token' => \Drupal::getContainer()->get('csrf_token')->get("comment/{$entity->id()}/report")]]),
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/comment/comment.install b/core/modules/comment/comment.install
index ca356eb0315ab0a2d5ca28ebaff7697dda0a8a9b..a0d819ee236694c0f462f5a301a26dd7ee660908 100644
--- a/core/modules/comment/comment.install
+++ b/core/modules/comment/comment.install
@@ -15,7 +15,7 @@
  */
 function comment_uninstall() {
   // Remove the comment fields.
-  $fields = entity_load_multiple_by_properties('field_storage_config', array('type' => 'comment'));
+  $fields = entity_load_multiple_by_properties('field_storage_config', ['type' => 'comment']);
   foreach ($fields as $field) {
     $field->delete();
   }
@@ -37,78 +37,78 @@ function comment_install() {
  * Implements hook_schema().
  */
 function comment_schema() {
-  $schema['comment_entity_statistics'] = array(
+  $schema['comment_entity_statistics'] = [
     'description' => 'Maintains statistics of entity and comments posts to show "new" and "updated" flags.',
-    'fields' => array(
-      'entity_id' => array(
+    'fields' => [
+      'entity_id' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The entity_id of the entity for which the statistics are compiled.',
-      ),
-      'entity_type' => array(
+      ],
+      'entity_type' => [
         'type' => 'varchar_ascii',
         'not null' => TRUE,
         'default' => 'node',
         'length' => EntityTypeInterface::ID_MAX_LENGTH,
         'description' => 'The entity_type of the entity to which this comment is a reply.',
-      ),
-      'field_name' => array(
+      ],
+      'field_name' => [
         'type' => 'varchar_ascii',
         'not null' => TRUE,
         'default' => '',
         'length' => FieldStorageConfig::NAME_MAX_LENGTH,
         'description' => 'The field_name of the field that was used to add this comment.',
-      ),
-      'cid' => array(
+      ],
+      'cid' => [
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The {comment}.cid of the last comment.',
-      ),
-      'last_comment_timestamp' => array(
+      ],
+      'last_comment_timestamp' => [
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The Unix timestamp of the last comment that was posted within this node, from {comment}.changed.',
-      ),
-      'last_comment_name' => array(
+      ],
+      'last_comment_name' => [
         'type' => 'varchar',
         'length' => 60,
         'not null' => FALSE,
         'description' => 'The name of the latest author to post a comment on this node, from {comment}.name.',
-      ),
-      'last_comment_uid' => array(
+      ],
+      'last_comment_uid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The user ID of the latest author to post a comment on this node, from {comment}.uid.',
-      ),
-      'comment_count' => array(
+      ],
+      'comment_count' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The total number of comments on this entity.',
-      ),
-    ),
-    'primary key' => array('entity_id', 'entity_type', 'field_name'),
-    'indexes' => array(
-      'last_comment_timestamp' => array('last_comment_timestamp'),
-      'comment_count' => array('comment_count'),
-      'last_comment_uid' => array('last_comment_uid'),
-    ),
-    'foreign keys' => array(
-      'last_comment_author' => array(
+      ],
+    ],
+    'primary key' => ['entity_id', 'entity_type', 'field_name'],
+    'indexes' => [
+      'last_comment_timestamp' => ['last_comment_timestamp'],
+      'comment_count' => ['comment_count'],
+      'last_comment_uid' => ['last_comment_uid'],
+    ],
+    'foreign keys' => [
+      'last_comment_author' => [
         'table' => 'users',
-        'columns' => array(
+        'columns' => [
           'last_comment_uid' => 'uid',
-        ),
-      ),
-    ),
-  );
+        ],
+      ],
+    ],
+  ];
 
   return $schema;
 }
diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index ae8131559dd1fd6c6da422be3f4b7103d04ed777..ee26510729e32f1a515eda19c476e050a3a6dde9 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -68,19 +68,19 @@ function comment_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.comment':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Comment module allows users to comment on site content, set commenting defaults and permissions, and moderate comments. For more information, see the <a href=":comment">online documentation for the Comment module</a>.', array(':comment' => 'https://www.drupal.org/documentation/modules/comment')) . '</p>';
+      $output .= '<p>' . t('The Comment module allows users to comment on site content, set commenting defaults and permissions, and moderate comments. For more information, see the <a href=":comment">online documentation for the Comment module</a>.', [':comment' => 'https://www.drupal.org/documentation/modules/comment']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Enabling commenting') . '</dt>';
-      $output .= '<dd>' . t('Comment functionality can be enabled for any entity sub-type (for example, a <a href=":content-type">content type</a>) by adding a <em>Comments</em> field on its <em>Manage fields page</em>. Adding or removing commenting for an entity through the user interface requires the <a href=":field_ui">Field UI</a> module to be enabled, even though the commenting functionality works without it. For more information on fields and entities, see the <a href=":field">Field module help page</a>.', array(':content-type' => (\Drupal::moduleHandler()->moduleExists('node')) ? \Drupal::url('entity.node_type.collection') : '#', ':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('Comment functionality can be enabled for any entity sub-type (for example, a <a href=":content-type">content type</a>) by adding a <em>Comments</em> field on its <em>Manage fields page</em>. Adding or removing commenting for an entity through the user interface requires the <a href=":field_ui">Field UI</a> module to be enabled, even though the commenting functionality works without it. For more information on fields and entities, see the <a href=":field">Field module help page</a>.', [':content-type' => (\Drupal::moduleHandler()->moduleExists('node')) ? \Drupal::url('entity.node_type.collection') : '#', ':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Configuring commenting settings') . '</dt>';
       $output .= '<dd>' . t('Commenting settings can be configured by editing the <em>Comments</em> field on the <em>Manage fields page</em> of an entity type if the <em>Field UI module</em> is enabled. Configuration includes the label of the comments field, the number of comments to be displayed, and whether they are shown in threaded list. Commenting can be be configured as: <em>Open</em> to allow new comments, <em>Closed</em> to view existing comments, but prevent new comments, or <em>Hidden</em> to hide existing comments and prevent new comments. Changing this configuration for an entity type will not change existing entity items.') . '</dd>';
       $output .= '<dt>' . t('Overriding default settings') . '</dt>';
       $output .= '<dd>' . t('Users with the appropriate permissions can override the default commenting settings of an entity type when they create an item of that type.') . '</dd>';
       $output .= '<dt>' . t('Adding comment types') . '</dt>';
-      $output .= '<dd>' . t('Additional <em>comment types</em> can be created per entity sub-type and added on the <a href=":field">Comment types page</a>. If there are multiple comment types available you can select the appropriate one after adding a <em>Comments field</em>.', array(':field' => \Drupal::url('entity.comment_type.collection'))) . '</dd>';
+      $output .= '<dd>' . t('Additional <em>comment types</em> can be created per entity sub-type and added on the <a href=":field">Comment types page</a>. If there are multiple comment types available you can select the appropriate one after adding a <em>Comments field</em>.', [':field' => \Drupal::url('entity.comment_type.collection')]) . '</dd>';
       $output .= '<dt>' . t('Approving and managing comments') . '</dt>';
-      $output .= '<dd>' . t('Comments from users who have the <em>Skip comment approval</em> permission are published immediately. All other comments are placed in the <a href=":comment-approval">Unapproved comments</a> queue, until a user who has permission to <em>Administer comments and comment settings</em> publishes or deletes them. Published comments can be bulk managed on the <a href=":admin-comment">Published comments</a> administration page. When a comment has no replies, it remains editable by its author, as long as the author has <em>Edit own comments</em> permission.', array(':comment-approval' => \Drupal::url('comment.admin_approval'), ':admin-comment' => \Drupal::url('comment.admin'))) . '</dd>';
+      $output .= '<dd>' . t('Comments from users who have the <em>Skip comment approval</em> permission are published immediately. All other comments are placed in the <a href=":comment-approval">Unapproved comments</a> queue, until a user who has permission to <em>Administer comments and comment settings</em> publishes or deletes them. Published comments can be bulk managed on the <a href=":admin-comment">Published comments</a> administration page. When a comment has no replies, it remains editable by its author, as long as the author has <em>Edit own comments</em> permission.', [':comment-approval' => \Drupal::url('comment.admin_approval'), ':admin-comment' => \Drupal::url('comment.admin')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -96,10 +96,10 @@ function comment_help($route_name, RouteMatchInterface $route_match) {
 function comment_uri(CommentInterface $comment) {
   return new Url(
     'entity.comment.canonical',
-    array(
+    [
       'comment' => $comment->id(),
-    ),
-    array('fragment' => 'comment-' . $comment->id())
+    ],
+    ['fragment' => 'comment-' . $comment->id()]
   );
 }
 
@@ -107,23 +107,23 @@ function comment_uri(CommentInterface $comment) {
  * Implements hook_entity_extra_field_info().
  */
 function comment_entity_extra_field_info() {
-  $return = array();
+  $return = [];
   foreach (CommentType::loadMultiple() as $comment_type) {
-    $return['comment'][$comment_type->id()] = array(
-      'form' => array(
-        'author' => array(
+    $return['comment'][$comment_type->id()] = [
+      'form' => [
+        'author' => [
           'label' => t('Author'),
           'description' => t('Author textfield'),
           'weight' => -2,
-        ),
-      ),
-    );
-    $return['comment'][$comment_type->id()]['display']['links'] = array(
+        ],
+      ],
+    ];
+    $return['comment'][$comment_type->id()]['display']['links'] = [
       'label' => t('Links'),
       'description' => t('Comment operation links'),
       'weight' => 100,
       'visible' => TRUE,
-    );
+    ];
   }
 
   return $return;
@@ -133,14 +133,14 @@ function comment_entity_extra_field_info() {
  * Implements hook_theme().
  */
 function comment_theme() {
-  return array(
-    'comment' => array(
+  return [
+    'comment' => [
       'render element' => 'elements',
-    ),
-    'field__comment' => array(
+    ],
+    'field__comment' => [
       'base hook' => 'field',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -150,15 +150,15 @@ function comment_field_config_create(FieldConfigInterface $field) {
   if ($field->getType() == 'comment' && !$field->isSyncing()) {
     // Assign default values for the field.
     $default_value = $field->getDefaultValueLiteral();
-    $default_value += array(array());
-    $default_value[0] += array(
+    $default_value += [[]];
+    $default_value[0] += [
       'status' => CommentItemInterface::OPEN,
       'cid' => 0,
       'last_comment_timestamp' => 0,
       'last_comment_name' => '',
       'last_comment_uid' => 0,
       'comment_count' => 0,
-    );
+    ];
     $field->setDefaultValue($default_value);
   }
 }
@@ -227,14 +227,14 @@ function comment_entity_view(array &$build, EntityInterface $entity, EntityViewD
       if ($entity->hasField($field_name) && $entity->get($field_name)->status != CommentItemInterface::HIDDEN) {
         // Add a comments RSS element which is a URL to the comments of this
         // entity.
-        $options = array(
+        $options = [
           'fragment' => 'comments',
           'absolute' => TRUE,
-        );
-        $entity->rss_elements[] = array(
+        ];
+        $entity->rss_elements[] = [
           'key' => 'comments',
           'value' => $entity->url('canonical', $options),
-        );
+        ];
       }
     }
   }
@@ -457,7 +457,7 @@ function comment_node_update_index(EntityInterface $node) {
     }
   }
 
-  $build = array();
+  $build = [];
 
   if ($index_comments) {
     foreach (\Drupal::service('comment.manager')->getFields('node') as $field_name => $info) {
@@ -517,7 +517,7 @@ function comment_node_search_result(EntityInterface $node) {
   // Do not make a string if there are no comment fields, or no comments exist
   // or all comment fields are hidden.
   if ($comments > 0 || $open) {
-    return array('comment' => \Drupal::translation()->formatPlural($comments, '1 comment', '@count comments'));
+    return ['comment' => \Drupal::translation()->formatPlural($comments, '1 comment', '@count comments')];
   }
 }
 
@@ -527,7 +527,7 @@ function comment_node_search_result(EntityInterface $node) {
 function comment_user_cancel($edit, $account, $method) {
   switch ($method) {
     case 'user_cancel_block_unpublish':
-      $comments = entity_load_multiple_by_properties('comment', array('uid' => $account->id()));
+      $comments = entity_load_multiple_by_properties('comment', ['uid' => $account->id()]);
       foreach ($comments as $comment) {
         $comment->setPublished(CommentInterface::NOT_PUBLISHED);
         $comment->save();
@@ -536,7 +536,7 @@ function comment_user_cancel($edit, $account, $method) {
 
     case 'user_cancel_reassign':
       /** @var \Drupal\comment\CommentInterface[] $comments */
-      $comments = entity_load_multiple_by_properties('comment', array('uid' => $account->id()));
+      $comments = entity_load_multiple_by_properties('comment', ['uid' => $account->id()]);
       foreach ($comments as $comment) {
         $comment->setOwnerId(0);
         $comment->setAuthorName(\Drupal::config('user.settings')->get('anonymous'));
@@ -568,7 +568,7 @@ function comment_user_predelete($account) {
  *   An array as expected by drupal_render().
  */
 function comment_preview(CommentInterface $comment, FormStateInterface $form_state) {
-  $preview_build = array();
+  $preview_build = [];
   $entity = $comment->getCommentedEntity();
 
   if (!$form_state->getErrors()) {
@@ -580,7 +580,7 @@ function comment_preview(CommentInterface $comment, FormStateInterface $form_sta
   }
 
   if ($comment->hasParentComment()) {
-    $build = array();
+    $build = [];
     $parent = $comment->getParentComment();
     if ($parent && $parent->isPublished()) {
       $build = \Drupal::entityTypeManager()->getViewBuilder('comment')->view($parent);
@@ -636,10 +636,10 @@ function template_preprocess_comment(&$variables) {
   $variables['threaded'] = $variables['elements']['#comment_threaded'];
 
   $account = $comment->getOwner();
-  $username = array(
+  $username = [
     '#theme' => 'username',
     '#account' => $account,
-  );
+  ];
   $variables['author'] = drupal_render($username);
   $variables['author_id'] = $comment->getOwnerId();
   $variables['new_indicator_timestamp'] = $comment->getChangedTime();
@@ -658,7 +658,7 @@ function template_preprocess_comment(&$variables) {
     $variables['user_picture'] = user_view($account, 'compact');
   }
   else {
-    $variables['user_picture'] = array();
+    $variables['user_picture'] = [];
   }
 
   if (isset($comment->in_preview)) {
@@ -667,25 +667,25 @@ function template_preprocess_comment(&$variables) {
   }
   else {
     $uri = $comment->permalink();
-    $attributes = $uri->getOption('attributes') ?: array();
-    $attributes += array('class' => array('permalink'), 'rel' => 'bookmark');
+    $attributes = $uri->getOption('attributes') ?: [];
+    $attributes += ['class' => ['permalink'], 'rel' => 'bookmark'];
     $uri->setOption('attributes', $attributes);
     $variables['title'] = \Drupal::l($comment->getSubject(), $uri);
 
     $variables['permalink'] = \Drupal::l(t('Permalink'), $comment->permalink());
   }
 
-  $variables['submitted'] = t('Submitted by @username on @datetime', array('@username' => $variables['author'], '@datetime' => $variables['created']));
+  $variables['submitted'] = t('Submitted by @username on @datetime', ['@username' => $variables['author'], '@datetime' => $variables['created']]);
 
   if ($comment->hasParentComment()) {
     // Fetch and store the parent comment information for use in templates.
     $comment_parent = $comment->getParentComment();
     $account_parent = $comment_parent->getOwner();
     $variables['parent_comment'] = $comment_parent;
-    $username = array(
+    $username = [
       '#theme' => 'username',
       '#account' => $account_parent,
-    );
+    ];
     $variables['parent_author'] = drupal_render($username);
     $variables['parent_created'] = format_date($comment_parent->getCreatedTime());
     // Avoid calling format_date() twice on the same timestamp.
@@ -696,13 +696,13 @@ function template_preprocess_comment(&$variables) {
       $variables['parent_changed'] = format_date($comment_parent->getChangedTime());
     }
     $permalink_uri_parent = $comment_parent->permalink();
-    $attributes = $permalink_uri_parent->getOption('attributes') ?: array();
-    $attributes += array('class' => array('permalink'), 'rel' => 'bookmark');
+    $attributes = $permalink_uri_parent->getOption('attributes') ?: [];
+    $attributes += ['class' => ['permalink'], 'rel' => 'bookmark'];
     $permalink_uri_parent->setOption('attributes', $attributes);
     $variables['parent_title'] = \Drupal::l($comment_parent->getSubject(), $permalink_uri_parent);
     $variables['parent_permalink'] = \Drupal::l(t('Parent permalink'), $permalink_uri_parent);
     $variables['parent'] = t('In reply to @parent_title by @parent_username',
-        array('@parent_username' => $variables['parent_author'], '@parent_title' => $variables['parent_title']));
+        ['@parent_username' => $variables['parent_author'], '@parent_title' => $variables['parent_title']]);
   }
   else {
     $variables['parent_comment'] = '';
diff --git a/core/modules/comment/comment.tokens.inc b/core/modules/comment/comment.tokens.inc
index 5af2e6a174749b31e7adf5619dcf6dff877db7e6..884144196a2e59dff102d6a7834b95403a5d02eb 100644
--- a/core/modules/comment/comment.tokens.inc
+++ b/core/modules/comment/comment.tokens.inc
@@ -15,11 +15,11 @@
  * Implements hook_token_info().
  */
 function comment_token_info() {
-  $type = array(
+  $type = [
     'name' => t('Comments'),
     'description' => t('Tokens for comments posted on the site.'),
     'needs-data' => 'comment',
-  );
+  ];
 
   $tokens = [];
   // Provide a integration for each entity type except comment.
@@ -45,76 +45,76 @@ function comment_token_info() {
   }
 
   // Core comment tokens
-  $comment['cid'] = array(
+  $comment['cid'] = [
     'name' => t("Comment ID"),
     'description' => t("The unique ID of the comment."),
-  );
-  $comment['hostname'] = array(
+  ];
+  $comment['hostname'] = [
     'name' => t("IP Address"),
     'description' => t("The IP address of the computer the comment was posted from."),
-  );
-  $comment['mail'] = array(
+  ];
+  $comment['mail'] = [
     'name' => t("Email address"),
     'description' => t("The email address left by the comment author."),
-  );
-  $comment['homepage'] = array(
+  ];
+  $comment['homepage'] = [
     'name' => t("Home page"),
     'description' => t("The home page URL left by the comment author."),
-  );
-  $comment['title'] = array(
+  ];
+  $comment['title'] = [
     'name' => t("Title"),
     'description' => t("The title of the comment."),
-  );
-  $comment['body'] = array(
+  ];
+  $comment['body'] = [
     'name' => t("Content"),
     'description' => t("The formatted content of the comment itself."),
-  );
-  $comment['langcode'] = array(
+  ];
+  $comment['langcode'] = [
     'name' => t('Language code'),
     'description' => t('The language code of the language the comment is written in.'),
-  );
-  $comment['url'] = array(
+  ];
+  $comment['url'] = [
     'name' => t("URL"),
     'description' => t("The URL of the comment."),
-  );
-  $comment['edit-url'] = array(
+  ];
+  $comment['edit-url'] = [
     'name' => t("Edit URL"),
     'description' => t("The URL of the comment's edit page."),
-  );
+  ];
 
   // Chained tokens for comments
-  $comment['created'] = array(
+  $comment['created'] = [
     'name' => t("Date created"),
     'description' => t("The date the comment was posted."),
     'type' => 'date',
-  );
-  $comment['changed'] = array(
+  ];
+  $comment['changed'] = [
     'name' => t("Date changed"),
     'description' => t("The date the comment was most recently updated."),
     'type' => 'date',
-  );
-  $comment['parent'] = array(
+  ];
+  $comment['parent'] = [
     'name' => t("Parent"),
     'description' => t("The comment's parent, if comment threading is active."),
     'type' => 'comment',
-  );
-  $comment['entity'] = array(
+  ];
+  $comment['entity'] = [
     'name' => t("Entity"),
     'description' => t("The entity the comment was posted to."),
     'type' => 'entity',
-  );
-  $comment['author'] = array(
+  ];
+  $comment['author'] = [
     'name' => t("Author"),
     'description' => t("The author name of the comment."),
     'type' => 'user',
-  );
+  ];
 
-  return array(
-    'types' => array('comment' => $type),
-    'tokens' => array(
+  return [
+    'types' => ['comment' => $type],
+    'tokens' => [
       'comment' => $comment,
-    ) + $tokens,
-  );
+    ] + $tokens,
+  ];
 }
 
 /**
@@ -123,7 +123,7 @@ function comment_token_info() {
 function comment_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
   $token_service = \Drupal::token();
 
-  $url_options = array('absolute' => TRUE);
+  $url_options = ['absolute' => TRUE];
   if (isset($options['langcode'])) {
     $url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
     $langcode = $options['langcode'];
@@ -131,7 +131,7 @@ function comment_tokens($type, $tokens, array $data, array $options, BubbleableM
   else {
     $langcode = NULL;
   }
-  $replacements = array();
+  $replacements = [];
 
   if ($type == 'comment' && !empty($data['comment'])) {
     /** @var \Drupal\comment\CommentInterface $comment */
@@ -230,23 +230,23 @@ function comment_tokens($type, $tokens, array $data, array $options, BubbleableM
     // Chained token relationships.
     if ($entity_tokens = $token_service->findwithPrefix($tokens, 'entity')) {
       $entity = $comment->getCommentedEntity();
-      $replacements += $token_service->generate($comment->getCommentedEntityTypeId(), $entity_tokens, array($comment->getCommentedEntityTypeId() => $entity), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate($comment->getCommentedEntityTypeId(), $entity_tokens, [$comment->getCommentedEntityTypeId() => $entity], $options, $bubbleable_metadata);
     }
 
     if ($date_tokens = $token_service->findwithPrefix($tokens, 'created')) {
-      $replacements += $token_service->generate('date', $date_tokens, array('date' => $comment->getCreatedTime()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $date_tokens, ['date' => $comment->getCreatedTime()], $options, $bubbleable_metadata);
     }
 
     if ($date_tokens = $token_service->findwithPrefix($tokens, 'changed')) {
-      $replacements += $token_service->generate('date', $date_tokens, array('date' => $comment->getChangedTime()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $date_tokens, ['date' => $comment->getChangedTime()], $options, $bubbleable_metadata);
     }
 
     if (($parent_tokens = $token_service->findwithPrefix($tokens, 'parent')) && $parent = $comment->getParentComment()) {
-      $replacements += $token_service->generate('comment', $parent_tokens, array('comment' => $parent), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('comment', $parent_tokens, ['comment' => $parent], $options, $bubbleable_metadata);
     }
 
     if (($author_tokens = $token_service->findwithPrefix($tokens, 'author')) && $account = $comment->getOwner()) {
-      $replacements += $token_service->generate('user', $author_tokens, array('user' => $account), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('user', $author_tokens, ['user' => $account], $options, $bubbleable_metadata);
     }
   }
   // Replacement tokens for any content entities that have comment field.
diff --git a/core/modules/comment/comment.views.inc b/core/modules/comment/comment.views.inc
index fb11a4f7a551febbd55677eafd03f046f27f159d..11abede944c1ebe90c3d9a220d120a0292a04b63 100644
--- a/core/modules/comment/comment.views.inc
+++ b/core/modules/comment/comment.views.inc
@@ -13,14 +13,14 @@
 function comment_views_data_alter(&$data) {
   // New comments are only supported for node table because it requires the
   // history table.
-  $data['node']['new_comments'] = array(
+  $data['node']['new_comments'] = [
     'title' => t('New comments'),
     'help' => t('The number of new comments on the node.'),
-    'field' => array(
+    'field' => [
       'id' => 'node_new_comments',
       'no group by' => TRUE,
-    ),
-  );
+    ],
+  ];
 
   // Provide a integration for each entity type except comment.
   foreach (\Drupal::entityManager()->getDefinitions() as $entity_type_id => $entity_type) {
@@ -29,25 +29,25 @@ function comment_views_data_alter(&$data) {
     }
     $fields = \Drupal::service('comment.manager')->getFields($entity_type_id);
     $base_table = $entity_type->getDataTable() ?: $entity_type->getBaseTable();
-    $args = array('@entity_type' => $entity_type_id);
+    $args = ['@entity_type' => $entity_type_id];
 
     if ($fields) {
-      $data[$base_table]['comments_link'] = array(
-        'field' => array(
+      $data[$base_table]['comments_link'] = [
+        'field' => [
           'title' => t('Add comment link'),
           'help' => t('Display the standard add comment link used on regular @entity_type, which will only display if the viewing user has access to add a comment.', $args),
           'id' => 'comment_entity_link',
-        ),
-      );
+        ],
+      ];
 
       // Multilingual properties are stored in data table.
       if (!($table = $entity_type->getDataTable())) {
         $table = $entity_type->getBaseTable();
       }
-      $data[$table]['uid_touch'] = array(
+      $data[$table]['uid_touch'] = [
         'title' => t('User posted or commented'),
         'help' => t('Display nodes only if a user posted the @entity_type or commented on the @entity_type.', $args),
-        'argument' => array(
+        'argument' => [
           'field' => 'uid',
           'name table' => 'users_field_data',
           'name field' => 'name',
@@ -55,40 +55,40 @@ function comment_views_data_alter(&$data) {
           'no group by' => TRUE,
           'entity_type' => $entity_type_id,
           'entity_id' => $entity_type->getKey('id'),
-        ),
-        'filter' => array(
+        ],
+        'filter' => [
           'field' => 'uid',
           'name table' => 'users_field_data',
           'name field' => 'name',
           'id' => 'comment_user_uid',
           'entity_type' => $entity_type_id,
           'entity_id' => $entity_type->getKey('id'),
-        ),
-      );
+        ],
+      ];
 
       foreach ($fields as $field_name => $field) {
-        $data[$base_table][$field_name . '_cid'] = array(
-          'title' => t('Comments of the @entity_type using field: @field_name', $args + array('@field_name' => $field_name)),
+        $data[$base_table][$field_name . '_cid'] = [
+          'title' => t('Comments of the @entity_type using field: @field_name', $args + ['@field_name' => $field_name]),
           'help' => t('Relate all comments on the @entity_type. This will create 1 duplicate record for every comment. Usually if you need this it is better to create a comment view.', $args),
-          'relationship' => array(
+          'relationship' => [
             'group' => t('Comment'),
             'label' => t('Comments'),
             'base' => 'comment_field_data',
             'base field' => 'entity_id',
             'relationship field' => $entity_type->getKey('id'),
             'id' => 'standard',
-            'extra' => array(
-              array(
+            'extra' => [
+              [
                 'field' => 'entity_type',
                 'value' => $entity_type_id,
-              ),
-              array(
+              ],
+              [
                 'field' => 'field_name',
                 'value' => $field_name,
-              ),
-            ),
-          ),
-        );
+              ],
+            ],
+          ],
+        ];
       }
     }
   }
diff --git a/core/modules/comment/src/CommentAccessControlHandler.php b/core/modules/comment/src/CommentAccessControlHandler.php
index 639575a423de95cc3bcb6bfd0ee8e694be81b175..bcb0fd7a082b6bee5aa25c9bde70f01575cfafea 100644
--- a/core/modules/comment/src/CommentAccessControlHandler.php
+++ b/core/modules/comment/src/CommentAccessControlHandler.php
@@ -67,23 +67,23 @@ protected function checkFieldAccess($operation, FieldDefinitionInterface $field_
     if ($operation == 'edit') {
       // Only users with the "administer comments" permission can edit
       // administrative fields.
-      $administrative_fields = array(
+      $administrative_fields = [
         'uid',
         'status',
         'created',
         'date',
-      );
+      ];
       if (in_array($field_definition->getName(), $administrative_fields, TRUE)) {
         return AccessResult::allowedIfHasPermission($account, 'administer comments');
       }
 
       // No user can change read-only fields.
-      $read_only_fields = array(
+      $read_only_fields = [
         'hostname',
         'changed',
         'cid',
         'thread',
-      );
+      ];
       // These fields can be edited during comment creation.
       $create_only_fields = [
         'comment_type',
diff --git a/core/modules/comment/src/CommentForm.php b/core/modules/comment/src/CommentForm.php
index 3a2e704100274e4b70039412cd3f4eb6d4581faa..28231b8cb7793f648795689ef0893869696c5e0f 100644
--- a/core/modules/comment/src/CommentForm.php
+++ b/core/modules/comment/src/CommentForm.php
@@ -91,7 +91,7 @@ public function form(array $form, FormStateInterface $form_state) {
 
     // Use #comment-form as unique jump target, regardless of entity type.
     $form['#id'] = Html::getUniqueId('comment_form');
-    $form['#theme'] = array('comment_form__' . $entity->getEntityTypeId() . '__' . $entity->bundle() . '__' . $field_name, 'comment_form');
+    $form['#theme'] = ['comment_form__' . $entity->getEntityTypeId() . '__' . $entity->bundle() . '__' . $field_name, 'comment_form'];
 
     $anonymous_contact = $field_definition->getSetting('anonymous');
     $is_admin = $comment->id() && $this->currentUser->hasPermission('administer comments');
@@ -104,7 +104,7 @@ public function form(array $form, FormStateInterface $form_state) {
     // If not replying to a comment, use our dedicated page callback for new
     // Comments on entities.
     if (!$comment->id() && !$comment->hasParentComment()) {
-      $form['#action'] = $this->url('comment.reply', array('entity_type' => $entity->getEntityTypeId(), 'entity' => $entity->id(), 'field_name' => $field_name));
+      $form['#action'] = $this->url('comment.reply', ['entity_type' => $entity->getEntityTypeId(), 'entity' => $entity->id(), 'field_name' => $field_name]);
     }
 
     $comment_preview = $form_state->get('comment_preview');
@@ -112,13 +112,13 @@ public function form(array $form, FormStateInterface $form_state) {
       $form += $comment_preview;
     }
 
-    $form['author'] = array();
+    $form['author'] = [];
     // Display author information in a details element for comment moderators.
     if ($is_admin) {
-      $form['author'] += array(
+      $form['author'] += [
         '#type' => 'details',
         '#title' => $this->t('Administration'),
-      );
+      ];
     }
 
     // Prepare default values for form elements.
@@ -129,9 +129,9 @@ public function form(array $form, FormStateInterface $form_state) {
       }
       $status = $comment->getStatus();
       if (empty($comment_preview)) {
-        $form['#title'] = $this->t('Edit comment %title', array(
+        $form['#title'] = $this->t('Edit comment %title', [
           '%title' => $comment->getSubject(),
-        ));
+        ]);
       }
     }
     else {
@@ -162,7 +162,7 @@ public function form(array $form, FormStateInterface $form_state) {
     // The name field is displayed when an anonymous user is adding a comment or
     // when a user with the permission 'administer comments' is editing an
     // existing comment from an anonymous user.
-    $form['author']['name'] = array(
+    $form['author']['name'] = [
       '#type' => 'textfield',
       '#title' => $is_admin ? $this->t('Name for @anonymous', ['@anonymous' => $config->get('anonymous')]) : $this->t('Your name'),
       '#default_value' => $author,
@@ -173,20 +173,20 @@ public function form(array $form, FormStateInterface $form_state) {
       '#attributes' => [
         'data-drupal-default-value' => $config->get('anonymous'),
       ],
-    );
+    ];
 
     if ($is_admin) {
       // When editing a comment only display the name textfield if the uid field
       // is empty.
       $form['author']['name']['#states'] = [
         'visible' => [
-          ':input[name="uid"]' => array('empty' => TRUE),
+          ':input[name="uid"]' => ['empty' => TRUE],
         ],
       ];
     }
 
     // Add author email and homepage fields depending on the current user.
-    $form['author']['mail'] = array(
+    $form['author']['mail'] = [
       '#type' => 'email',
       '#title' => $this->t('Email'),
       '#default_value' => $comment->getAuthorEmail(),
@@ -195,36 +195,36 @@ public function form(array $form, FormStateInterface $form_state) {
       '#size' => 30,
       '#description' => $this->t('The content of this field is kept private and will not be shown publicly.'),
       '#access' => ($comment->getOwner()->isAnonymous() && $is_admin) || ($this->currentUser->isAnonymous() && $anonymous_contact != COMMENT_ANONYMOUS_MAYNOT_CONTACT),
-    );
+    ];
 
-    $form['author']['homepage'] = array(
+    $form['author']['homepage'] = [
       '#type' => 'url',
       '#title' => $this->t('Homepage'),
       '#default_value' => $comment->getHomepage(),
       '#maxlength' => 255,
       '#size' => 30,
       '#access' => $is_admin || ($this->currentUser->isAnonymous() && $anonymous_contact != COMMENT_ANONYMOUS_MAYNOT_CONTACT),
-    );
+    ];
 
     // Add administrative comment publishing options.
-    $form['author']['date'] = array(
+    $form['author']['date'] = [
       '#type' => 'datetime',
       '#title' => $this->t('Authored on'),
       '#default_value' => $date,
       '#size' => 20,
       '#access' => $is_admin,
-    );
+    ];
 
-    $form['author']['status'] = array(
+    $form['author']['status'] = [
       '#type' => 'radios',
       '#title' => $this->t('Status'),
       '#default_value' => $status,
-      '#options' => array(
+      '#options' => [
         CommentInterface::PUBLISHED => $this->t('Published'),
         CommentInterface::NOT_PUBLISHED => $this->t('Not published'),
-      ),
+      ],
       '#access' => $is_admin,
-    );
+    ];
 
     return parent::form($form, $form_state, $comment);
   }
@@ -250,12 +250,12 @@ protected function actions(array $form, FormStateInterface $form_state) {
     // already previewing the submission.
     $element['submit']['#access'] = ($comment->id() && $this->currentUser->hasPermission('administer comments')) || $preview_mode != DRUPAL_REQUIRED || $form_state->get('comment_preview');
 
-    $element['preview'] = array(
+    $element['preview'] = [
       '#type' => 'submit',
       '#value' => $this->t('Preview'),
       '#access' => $preview_mode != DRUPAL_DISABLED,
-      '#submit' => array('::submitForm', '::preview'),
-    );
+      '#submit' => ['::submitForm', '::preview'],
+    ];
 
     return $element;
   }
@@ -365,10 +365,10 @@ public function save(array $form, FormStateInterface $form_state) {
       $form_state->setValue('cid', $comment->id());
 
       // Add a log entry.
-      $logger->notice('Comment posted: %subject.', array(
+      $logger->notice('Comment posted: %subject.', [
           '%subject' => $comment->getSubject(),
           'link' => $this->l(t('View'), $comment->urlInfo()->setOption('fragment', 'comment-' . $comment->id()))
-        ));
+        ]);
 
       // Explain the approval queue if necessary.
       if (!$comment->isPublished()) {
@@ -379,7 +379,7 @@ public function save(array $form, FormStateInterface $form_state) {
       else {
         drupal_set_message($this->t('Your comment has been posted.'));
       }
-      $query = array();
+      $query = [];
       // Find the current display page for this comment.
       $field_definition = $this->entityManager->getFieldDefinitions($entity->getEntityTypeId(), $entity->bundle())[$field_name];
       $page = $this->entityManager->getStorage('comment')->getDisplayOrdinal($comment, $field_definition->getSetting('default_mode'), $field_definition->getSetting('per_page'));
@@ -391,8 +391,8 @@ public function save(array $form, FormStateInterface $form_state) {
       $uri->setOption('fragment', 'comment-' . $comment->id());
     }
     else {
-      $logger->warning('Comment: unauthorized comment submitted or comment submitted to a closed post %subject.', array('%subject' => $comment->getSubject()));
-      drupal_set_message($this->t('Comment: unauthorized comment submitted or comment submitted to a closed post %subject.', array('%subject' => $comment->getSubject())), 'error');
+      $logger->warning('Comment: unauthorized comment submitted or comment submitted to a closed post %subject.', ['%subject' => $comment->getSubject()]);
+      drupal_set_message($this->t('Comment: unauthorized comment submitted or comment submitted to a closed post %subject.', ['%subject' => $comment->getSubject()]), 'error');
       // Redirect the user to the entity they are commenting on.
     }
     $form_state->setRedirectUrl($uri);
diff --git a/core/modules/comment/src/CommentLazyBuilders.php b/core/modules/comment/src/CommentLazyBuilders.php
index 4eeeb59d0c0c25d438c1e994eed17b6c81d3f3f8..730c840897f25d2125a304e8e49f921a9616e7ff 100644
--- a/core/modules/comment/src/CommentLazyBuilders.php
+++ b/core/modules/comment/src/CommentLazyBuilders.php
@@ -99,13 +99,13 @@ public function __construct(EntityManagerInterface $entity_manager, EntityFormBu
    *   A renderable array containing the comment form.
    */
   public function renderForm($commented_entity_type_id, $commented_entity_id, $field_name, $comment_type_id) {
-    $values = array(
+    $values = [
       'entity_type' => $commented_entity_type_id,
       'entity_id' => $commented_entity_id,
       'field_name' => $field_name,
       'comment_type' => $comment_type_id,
       'pid' => NULL,
-    );
+    ];
     $comment = $this->entityManager->getStorage('comment')->create($values);
     return $this->entityFormBuilder->getForm($comment);
   }
@@ -126,11 +126,11 @@ public function renderForm($commented_entity_type_id, $commented_entity_id, $fie
    *   A renderable array representing the comment links.
    */
   public function renderLinks($comment_entity_id, $view_mode, $langcode, $is_in_preview) {
-    $links = array(
+    $links = [
       '#theme' => 'links__comment',
-      '#pre_render' => array('drupal_pre_render_links'),
-      '#attributes' => array('class' => array('links', 'inline')),
-    );
+      '#pre_render' => ['drupal_pre_render_links'],
+      '#attributes' => ['class' => ['links', 'inline']],
+    ];
 
     if (!$is_in_preview) {
       /** @var \Drupal\comment\CommentInterface $entity */
@@ -140,11 +140,11 @@ public function renderLinks($comment_entity_id, $view_mode, $langcode, $is_in_pr
       $links['comment'] = $this->buildLinks($entity, $commented_entity);
 
       // Allow other modules to alter the comment links.
-      $hook_context = array(
+      $hook_context = [
         'view_mode' => $view_mode,
         'langcode' => $langcode,
         'commented_entity' => $commented_entity,
-      );
+      ];
       $this->moduleHandler->alter('comment_links', $links, $entity, $hook_context);
     }
     return $links;
@@ -162,25 +162,25 @@ public function renderLinks($comment_entity_id, $view_mode, $langcode, $is_in_pr
    *   An array that can be processed by drupal_pre_render_links().
    */
   protected function buildLinks(CommentInterface $entity, EntityInterface $commented_entity) {
-    $links = array();
+    $links = [];
     $status = $commented_entity->get($entity->getFieldName())->status;
 
     if ($status == CommentItemInterface::OPEN) {
       if ($entity->access('delete')) {
-        $links['comment-delete'] = array(
+        $links['comment-delete'] = [
           'title' => t('Delete'),
           'url' => $entity->urlInfo('delete-form'),
-        );
+        ];
       }
 
       if ($entity->access('update')) {
-        $links['comment-edit'] = array(
+        $links['comment-edit'] = [
           'title' => t('Edit'),
           'url' => $entity->urlInfo('edit-form'),
-        );
+        ];
       }
       if ($entity->access('create')) {
-        $links['comment-reply'] = array(
+        $links['comment-reply'] = [
           'title' => t('Reply'),
           'url' => Url::fromRoute('comment.reply', [
             'entity_type' => $entity->getCommentedEntityTypeId(),
@@ -188,13 +188,13 @@ protected function buildLinks(CommentInterface $entity, EntityInterface $comment
             'field_name' => $entity->getFieldName(),
             'pid' => $entity->id(),
           ]),
-        );
+        ];
       }
       if (!$entity->isPublished() && $entity->access('approve')) {
-        $links['comment-approve'] = array(
+        $links['comment-approve'] = [
           'title' => t('Approve'),
           'url' => Url::fromRoute('comment.approve', ['comment' => $entity->id()]),
-        );
+        ];
       }
       if (empty($links) && $this->currentUser->isAnonymous()) {
         $links['comment-forbidden']['title'] = $this->commentManager->forbiddenMessage($commented_entity, $entity->getFieldName());
@@ -203,18 +203,18 @@ protected function buildLinks(CommentInterface $entity, EntityInterface $comment
 
     // Add translations link for translation-enabled comment bundles.
     if ($this->moduleHandler->moduleExists('content_translation') && $this->access($entity)->isAllowed()) {
-      $links['comment-translations'] = array(
+      $links['comment-translations'] = [
         'title' => t('Translate'),
         'url' => $entity->urlInfo('drupal:content-translation-overview'),
-      );
+      ];
     }
 
-    return array(
+    return [
       '#theme' => 'links__comment__comment',
       // The "entity" property is specified to be present, so no need to check.
       '#links' => $links,
-      '#attributes' => array('class' => array('links', 'inline')),
-    );
+      '#attributes' => ['class' => ['links', 'inline']],
+    ];
   }
 
   /**
diff --git a/core/modules/comment/src/CommentLinkBuilder.php b/core/modules/comment/src/CommentLinkBuilder.php
index 9998e3f3d6f8948b96e8f16ab81dadfbcc196567..c7cbc18d376b32381eb55dc7a311e403bc1c2141 100644
--- a/core/modules/comment/src/CommentLinkBuilder.php
+++ b/core/modules/comment/src/CommentLinkBuilder.php
@@ -75,7 +75,7 @@ public function __construct(AccountInterface $current_user, CommentManagerInterf
    * {@inheritdoc}
    */
   public function buildCommentedEntityLinks(FieldableEntityInterface $entity, array &$context) {
-    $entity_links = array();
+    $entity_links = [];
     $view_mode = $context['view_mode'];
     if ($view_mode == 'search_index' || $view_mode == 'search_result' || $view_mode == 'print' || $view_mode == 'rss') {
       // Do not add any links if the entity is displayed for:
@@ -83,7 +83,7 @@ public function buildCommentedEntityLinks(FieldableEntityInterface $entity, arra
       // - constructing a search result excerpt.
       // - print.
       // - rss.
-      return array();
+      return [];
     }
 
     $fields = $this->commentManager->getFields($entity->getEntityTypeId());
@@ -92,7 +92,7 @@ public function buildCommentedEntityLinks(FieldableEntityInterface $entity, arra
       if (!$entity->hasField($field_name)) {
         continue;
       }
-      $links = array();
+      $links = [];
       $commenting_status = $entity->get($field_name)->status;
       if ($commenting_status != CommentItemInterface::HIDDEN) {
         // Entity has commenting status open or closed.
@@ -103,23 +103,23 @@ public function buildCommentedEntityLinks(FieldableEntityInterface $entity, arra
           // entity is open to new comments, and there currently are none.
           if ($this->currentUser->hasPermission('access comments')) {
             if (!empty($entity->get($field_name)->comment_count)) {
-              $links['comment-comments'] = array(
+              $links['comment-comments'] = [
                 'title' => $this->formatPlural($entity->get($field_name)->comment_count, '1 comment', '@count comments'),
-                'attributes' => array('title' => $this->t('Jump to the first comment.')),
+                'attributes' => ['title' => $this->t('Jump to the first comment.')],
                 'fragment' => 'comments',
                 'url' => $entity->urlInfo(),
-              );
+              ];
               if ($this->moduleHandler->moduleExists('history')) {
-                $links['comment-new-comments'] = array(
+                $links['comment-new-comments'] = [
                   'title' => '',
                   'url' => Url::fromRoute('<current>'),
-                  'attributes' => array(
+                  'attributes' => [
                     'class' => 'hidden',
                     'title' => $this->t('Jump to the first new comment.'),
                     'data-history-node-last-comment-timestamp' => $entity->get($field_name)->last_comment_timestamp,
                     'data-history-node-field-name' => $field_name,
-                  ),
-                );
+                  ],
+                ];
               }
             }
           }
@@ -127,12 +127,12 @@ public function buildCommentedEntityLinks(FieldableEntityInterface $entity, arra
           if ($commenting_status == CommentItemInterface::OPEN) {
             $comment_form_location = $field_definition->getSetting('form_location');
             if ($this->currentUser->hasPermission('post comments')) {
-              $links['comment-add'] = array(
+              $links['comment-add'] = [
                 'title' => $this->t('Add new comment'),
                 'language' => $entity->language(),
-                'attributes' => array('title' => $this->t('Share your thoughts and opinions.')),
+                'attributes' => ['title' => $this->t('Share your thoughts and opinions.')],
                 'fragment' => 'comment-form',
-              );
+              ];
               if ($comment_form_location == CommentItemInterface::FORM_SEPARATE_PAGE) {
                 $links['comment-add']['url'] = Url::fromRoute('comment.reply', [
                   'entity_type' => $entity->getEntityTypeId(),
@@ -145,9 +145,9 @@ public function buildCommentedEntityLinks(FieldableEntityInterface $entity, arra
               }
             }
             elseif ($this->currentUser->isAnonymous()) {
-              $links['comment-forbidden'] = array(
+              $links['comment-forbidden'] = [
                 'title' => $this->commentManager->forbiddenMessage($entity, $field_name),
-              );
+              ];
             }
           }
         }
@@ -161,11 +161,11 @@ public function buildCommentedEntityLinks(FieldableEntityInterface $entity, arra
               // Show the "post comment" link if the form is on another page, or
               // if there are existing comments that the link will skip past.
               if ($comment_form_location == CommentItemInterface::FORM_SEPARATE_PAGE || (!empty($entity->get($field_name)->comment_count) && $this->currentUser->hasPermission('access comments'))) {
-                $links['comment-add'] = array(
+                $links['comment-add'] = [
                   'title' => $this->t('Add new comment'),
-                  'attributes' => array('title' => $this->t('Share your thoughts and opinions.')),
+                  'attributes' => ['title' => $this->t('Share your thoughts and opinions.')],
                   'fragment' => 'comment-form',
-                );
+                ];
                 if ($comment_form_location == CommentItemInterface::FORM_SEPARATE_PAGE) {
                   $links['comment-add']['url'] = Url::fromRoute('comment.reply', [
                     'entity_type' => $entity->getEntityTypeId(),
@@ -179,20 +179,20 @@ public function buildCommentedEntityLinks(FieldableEntityInterface $entity, arra
               }
             }
             elseif ($this->currentUser->isAnonymous()) {
-              $links['comment-forbidden'] = array(
+              $links['comment-forbidden'] = [
                 'title' => $this->commentManager->forbiddenMessage($entity, $field_name),
-              );
+              ];
             }
           }
         }
       }
 
       if (!empty($links)) {
-        $entity_links['comment__' . $field_name] = array(
+        $entity_links['comment__' . $field_name] = [
           '#theme' => 'links__entity__comment__' . $field_name,
           '#links' => $links,
-          '#attributes' => array('class' => array('links', 'inline')),
-        );
+          '#attributes' => ['class' => ['links', 'inline']],
+        ];
         if ($view_mode == 'teaser' && $this->moduleHandler->moduleExists('history') && $this->currentUser->isAuthenticated()) {
           $entity_links['comment__' . $field_name]['#cache']['contexts'][] = 'user';
           $entity_links['comment__' . $field_name]['#attached']['library'][] = 'comment/drupal.node-new-comments-link';
diff --git a/core/modules/comment/src/CommentManager.php b/core/modules/comment/src/CommentManager.php
index fb1c61e4da63ee1a61fd517c7d69e99f175a684e..80cc427e34c3fad28e4cbee443d74ef4ef9bee4e 100644
--- a/core/modules/comment/src/CommentManager.php
+++ b/core/modules/comment/src/CommentManager.php
@@ -90,11 +90,11 @@ public function __construct(EntityManagerInterface $entity_manager, ConfigFactor
   public function getFields($entity_type_id) {
     $entity_type = $this->entityManager->getDefinition($entity_type_id);
     if (!$entity_type->entityClassImplements(FieldableEntityInterface::class)) {
-      return array();
+      return [];
     }
 
     $map = $this->entityManager->getFieldMapByFieldType('comment');
-    return isset($map[$entity_type_id]) ? $map[$entity_type_id] : array();
+    return isset($map[$entity_type_id]) ? $map[$entity_type_id] : [];
   }
 
   /**
@@ -103,28 +103,28 @@ public function getFields($entity_type_id) {
   public function addBodyField($comment_type_id) {
     if (!FieldConfig::loadByName('comment', $comment_type_id, 'comment_body')) {
       // Attaches the body field by default.
-      $field = $this->entityManager->getStorage('field_config')->create(array(
+      $field = $this->entityManager->getStorage('field_config')->create([
         'label' => 'Comment',
         'bundle' => $comment_type_id,
         'required' => TRUE,
         'field_storage' => FieldStorageConfig::loadByName('comment', 'comment_body'),
-      ));
+      ]);
       $field->save();
 
       // Assign widget settings for the 'default' form mode.
       entity_get_form_display('comment', $comment_type_id, 'default')
-        ->setComponent('comment_body', array(
+        ->setComponent('comment_body', [
           'type' => 'text_textarea',
-        ))
+        ])
         ->save();
 
       // Assign display settings for the 'default' view mode.
       entity_get_display('comment', $comment_type_id, 'default')
-        ->setComponent('comment_body', array(
+        ->setComponent('comment_body', [
           'label' => 'hidden',
           'type' => 'text_default',
           'weight' => 0,
-        ))
+        ])
         ->save();
     }
   }
@@ -151,24 +151,24 @@ public function forbiddenMessage(EntityInterface $entity, $field_name) {
           'entity' => $entity->id(),
           'field_name' => $field_name,
         ];
-        $destination = array('destination' => $this->url('comment.reply', $comment_reply_parameters, array('fragment' => 'comment-form')));
+        $destination = ['destination' => $this->url('comment.reply', $comment_reply_parameters, ['fragment' => 'comment-form'])];
       }
       else {
-        $destination = array('destination' => $entity->url('canonical', array('fragment' => 'comment-form')));
+        $destination = ['destination' => $entity->url('canonical', ['fragment' => 'comment-form'])];
       }
 
       if ($this->userConfig->get('register') != USER_REGISTER_ADMINISTRATORS_ONLY) {
         // Users can register themselves.
-        return $this->t('<a href=":login">Log in</a> or <a href=":register">register</a> to post comments', array(
-          ':login' => $this->urlGenerator->generateFromRoute('user.login', array(), array('query' => $destination)),
-          ':register' => $this->urlGenerator->generateFromRoute('user.register', array(), array('query' => $destination)),
-        ));
+        return $this->t('<a href=":login">Log in</a> or <a href=":register">register</a> to post comments', [
+          ':login' => $this->urlGenerator->generateFromRoute('user.login', [], ['query' => $destination]),
+          ':register' => $this->urlGenerator->generateFromRoute('user.register', [], ['query' => $destination]),
+        ]);
       }
       else {
         // Only admins can add new users, no public registration.
-        return $this->t('<a href=":login">Log in</a> to post comments', array(
-          ':login' => $this->urlGenerator->generateFromRoute('user.login', array(), array('query' => $destination)),
-        ));
+        return $this->t('<a href=":login">Log in</a> to post comments', [
+          ':login' => $this->urlGenerator->generateFromRoute('user.login', [], ['query' => $destination]),
+        ]);
       }
     }
     return '';
diff --git a/core/modules/comment/src/CommentStatistics.php b/core/modules/comment/src/CommentStatistics.php
index 74061ee61543c9de20a72872901662a860412f0e..3c6b571c26cea69d256ddb06452eca8182699057 100644
--- a/core/modules/comment/src/CommentStatistics.php
+++ b/core/modules/comment/src/CommentStatistics.php
@@ -65,14 +65,14 @@ public function __construct(Connection $database, AccountInterface $current_user
    * {@inheritdoc}
    */
   public function read($entities, $entity_type, $accurate = TRUE) {
-    $options = $accurate ? array() : array('target' => 'replica');
+    $options = $accurate ? [] : ['target' => 'replica'];
     $stats = $this->database->select('comment_entity_statistics', 'ces', $options)
       ->fields('ces')
       ->condition('ces.entity_id', array_keys($entities), 'IN')
       ->condition('ces.entity_type', $entity_type)
       ->execute();
 
-    $statistics_records = array();
+    $statistics_records = [];
     while ($entry = $stats->fetchObject()) {
       $statistics_records[] = $entry;
     }
@@ -94,7 +94,7 @@ public function delete(EntityInterface $entity) {
    */
   public function create(FieldableEntityInterface $entity, $fields) {
     $query = $this->database->insert('comment_entity_statistics')
-      ->fields(array(
+      ->fields([
         'entity_id',
         'entity_type',
         'field_name',
@@ -103,7 +103,7 @@ public function create(FieldableEntityInterface $entity, $fields) {
         'last_comment_name',
         'last_comment_uid',
         'comment_count',
-      ));
+      ]);
     foreach ($fields as $field_name => $detail) {
       // Skip fields that entity does not have.
       if (!$entity->hasField($field_name)) {
@@ -127,7 +127,7 @@ public function create(FieldableEntityInterface $entity, $fields) {
       if ($entity instanceof EntityChangedInterface) {
         $last_comment_timestamp = $entity->getChangedTimeAcrossTranslations();
       }
-      $query->values(array(
+      $query->values([
         'entity_id' => $entity->id(),
         'entity_type' => $entity->getEntityTypeId(),
         'field_name' => $field_name,
@@ -136,7 +136,7 @@ public function create(FieldableEntityInterface $entity, $fields) {
         'last_comment_name' => NULL,
         'last_comment_uid' => $last_comment_uid,
         'comment_count' => 0,
-      ));
+      ]);
     }
     $query->execute();
   }
@@ -145,24 +145,24 @@ public function create(FieldableEntityInterface $entity, $fields) {
    * {@inheritdoc}
    */
   public function getMaximumCount($entity_type) {
-    return $this->database->query('SELECT MAX(comment_count) FROM {comment_entity_statistics} WHERE entity_type = :entity_type', array(':entity_type' => $entity_type))->fetchField();
+    return $this->database->query('SELECT MAX(comment_count) FROM {comment_entity_statistics} WHERE entity_type = :entity_type', [':entity_type' => $entity_type])->fetchField();
   }
 
   /**
    * {@inheritdoc}
    */
   public function getRankingInfo() {
-    return array(
-      'comments' => array(
+    return [
+      'comments' => [
         'title' => t('Number of comments'),
-        'join' => array(
+        'join' => [
           'type' => 'LEFT',
           'table' => 'comment_entity_statistics',
           'alias' => 'ces',
           // Default to comment field as this is the most common use case for
           // nodes.
           'on' => "ces.entity_id = i.sid AND ces.entity_type = 'node' AND ces.field_name = 'comment'",
-        ),
+        ],
         // Inverse law that maps the highest view count on the site to 1 and 0
         // to 0. Note that the ROUND here is necessary for PostgreSQL and SQLite
         // in order to ensure that the :comment_scale argument is treated as
@@ -170,9 +170,9 @@ public function getRankingInfo() {
         // values in as strings instead of numbers in complex expressions like
         // this.
         'score' => '2.0 - 2.0 / (1.0 + ces.comment_count * (ROUND(:comment_scale, 4)))',
-        'arguments' => array(':comment_scale' => \Drupal::state()->get('comment.node_comment_statistics_scale') ?: 0),
-      ),
-    );
+        'arguments' => [':comment_scale' => \Drupal::state()->get('comment.node_comment_statistics_scale') ?: 0],
+      ],
+    ];
   }
 
   /**
@@ -198,7 +198,7 @@ public function update(CommentInterface $comment) {
     if ($count > 0) {
       // Comments exist.
       $last_reply = $this->database->select('comment_field_data', 'c')
-        ->fields('c', array('cid', 'name', 'changed', 'uid'))
+        ->fields('c', ['cid', 'name', 'changed', 'uid'])
         ->condition('c.entity_id', $comment->getCommentedEntityId())
         ->condition('c.entity_type', $comment->getCommentedEntityTypeId())
         ->condition('c.field_name', $comment->getFieldName())
@@ -210,18 +210,18 @@ public function update(CommentInterface $comment) {
         ->fetchObject();
       // Use merge here because entity could be created before comment field.
       $this->database->merge('comment_entity_statistics')
-        ->fields(array(
+        ->fields([
           'cid' => $last_reply->cid,
           'comment_count' => $count,
           'last_comment_timestamp' => $last_reply->changed,
           'last_comment_name' => $last_reply->uid ? '' : $last_reply->name,
           'last_comment_uid' => $last_reply->uid,
-        ))
-        ->keys(array(
+        ])
+        ->keys([
           'entity_id' => $comment->getCommentedEntityId(),
           'entity_type' => $comment->getCommentedEntityTypeId(),
           'field_name' => $comment->getFieldName(),
-        ))
+        ])
         ->execute();
     }
     else {
@@ -238,7 +238,7 @@ public function update(CommentInterface $comment) {
         $last_comment_uid = $this->currentUser->id();
       }
       $this->database->update('comment_entity_statistics')
-        ->fields(array(
+        ->fields([
           'cid' => 0,
           'comment_count' => 0,
           // Use the changed date of the entity if it's set, or default to
@@ -246,7 +246,7 @@ public function update(CommentInterface $comment) {
           'last_comment_timestamp' => ($entity instanceof EntityChangedInterface) ? $entity->getChangedTimeAcrossTranslations() : REQUEST_TIME,
           'last_comment_name' => '',
           'last_comment_uid' => $last_comment_uid,
-        ))
+        ])
         ->condition('entity_id', $comment->getCommentedEntityId())
         ->condition('entity_type', $comment->getCommentedEntityTypeId())
         ->condition('field_name', $comment->getFieldName())
@@ -255,7 +255,7 @@ public function update(CommentInterface $comment) {
 
     // Reset the cache of the commented entity so that when the entity is loaded
     // the next time, the statistics will be loaded again.
-    $this->entityManager->getStorage($comment->getCommentedEntityTypeId())->resetCache(array($comment->getCommentedEntityId()));
+    $this->entityManager->getStorage($comment->getCommentedEntityTypeId())->resetCache([$comment->getCommentedEntityId()]);
   }
 
 }
diff --git a/core/modules/comment/src/CommentStorage.php b/core/modules/comment/src/CommentStorage.php
index cc4fdcfc46f4c40ffebba2b464a3a5c3a55b9f40..d164d8ad9e9987a3ef286cb9ac1dab1804147007 100644
--- a/core/modules/comment/src/CommentStorage.php
+++ b/core/modules/comment/src/CommentStorage.php
@@ -147,7 +147,7 @@ public function getNewCommentPageNumber($total_comments, $new_comments, Fieldabl
 
       // 1. Find all the threads with a new comment.
       $unread_threads_query = $this->database->select('comment_field_data', 'comment')
-        ->fields('comment', array('thread'))
+        ->fields('comment', ['thread'])
         ->condition('entity_id', $entity->id())
         ->condition('entity_type', $entity->getEntityTypeId())
         ->condition('field_name', $field_name)
@@ -161,7 +161,7 @@ public function getNewCommentPageNumber($total_comments, $new_comments, Fieldabl
       $first_thread_query = $this->database->select($unread_threads_query, 'thread');
       $first_thread_query->addExpression('SUBSTRING(thread, 1, (LENGTH(thread) - 1))', 'torder');
       $first_thread = $first_thread_query
-        ->fields('thread', array('thread'))
+        ->fields('thread', ['thread'])
         ->orderBy('torder')
         ->range(0, 1)
         ->execute()
@@ -176,13 +176,13 @@ public function getNewCommentPageNumber($total_comments, $new_comments, Fieldabl
                         AND field_name = :field_name
                         AND status = :status
                         AND SUBSTRING(thread, 1, (LENGTH(thread) - 1)) < :thread
-                        AND default_langcode = 1', array(
+                        AND default_langcode = 1', [
         ':status' => CommentInterface::PUBLISHED,
         ':entity_id' => $entity->id(),
         ':field_name' => $field_name,
         ':entity_type' => $entity->getEntityTypeId(),
         ':thread' => $first_thread,
-      ))->fetchField();
+      ])->fetchField();
     }
 
     return $comments_per_page > 0 ? (int) ($count / $comments_per_page) : 0;
@@ -193,7 +193,7 @@ public function getNewCommentPageNumber($total_comments, $new_comments, Fieldabl
    */
   public function getChildCids(array $comments) {
     return $this->database->select('comment_field_data', 'c')
-      ->fields('c', array('cid'))
+      ->fields('c', ['cid'])
       ->condition('pid', array_keys($comments), 'IN')
       ->condition('default_langcode', 1)
       ->execute()
@@ -312,7 +312,7 @@ public function loadThread(EntityInterface $entity, $field_name, $mode, $comment
 
     $cids = $query->execute()->fetchCol();
 
-    $comments = array();
+    $comments = [];
     if ($cids) {
       $comments = $this->loadMultiple($cids);
     }
diff --git a/core/modules/comment/src/CommentStorageSchema.php b/core/modules/comment/src/CommentStorageSchema.php
index ee663c0d0ccd862284caefe2ecf14ee2e17efa8f..2106a8ec2b85905c7dc5387e9d2cee948765f92e 100644
--- a/core/modules/comment/src/CommentStorageSchema.php
+++ b/core/modules/comment/src/CommentStorageSchema.php
@@ -17,9 +17,9 @@ class CommentStorageSchema extends SqlContentEntityStorageSchema {
   protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $reset = FALSE) {
     $schema = parent::getEntitySchema($entity_type, $reset);
 
-    $schema['comment_field_data']['indexes'] += array(
-      'comment__status_pid' => array('pid', 'status'),
-      'comment__num_new' => array(
+    $schema['comment_field_data']['indexes'] += [
+      'comment__status_pid' => ['pid', 'status'],
+      'comment__num_new' => [
         'entity_id',
         'entity_type',
         'comment_type',
@@ -27,14 +27,14 @@ protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $res
         'created',
         'cid',
         'thread',
-      ),
-      'comment__entity_langcode' => array(
+      ],
+      'comment__entity_langcode' => [
         'entity_id',
         'entity_type',
         'comment_type',
         'default_langcode',
-      ),
-    );
+      ],
+    ];
 
     return $schema;
   }
diff --git a/core/modules/comment/src/CommentTranslationHandler.php b/core/modules/comment/src/CommentTranslationHandler.php
index 98afe3bdbc5e185c69eaff6c1b79cb317a977f4b..a0abe4b710ae14ada529c0ac9b5338387f8b1f4b 100644
--- a/core/modules/comment/src/CommentTranslationHandler.php
+++ b/core/modules/comment/src/CommentTranslationHandler.php
@@ -30,7 +30,7 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
    * {@inheritdoc}
    */
   protected function entityFormTitle(EntityInterface $entity) {
-    return t('Edit comment @subject', array('@subject' => $entity->label()));
+    return t('Edit comment @subject', ['@subject' => $entity->label()]);
   }
 
   /**
diff --git a/core/modules/comment/src/CommentTypeForm.php b/core/modules/comment/src/CommentTypeForm.php
index 594726ae62d6a2be8ba0c789f6359e67c27c6bd1..9cb147f7f0e398b5f7b3b9c9a66f060694055baf 100644
--- a/core/modules/comment/src/CommentTypeForm.php
+++ b/core/modules/comment/src/CommentTypeForm.php
@@ -71,32 +71,32 @@ public function form(array $form, FormStateInterface $form_state) {
 
     $comment_type = $this->entity;
 
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => t('Label'),
       '#maxlength' => 255,
       '#default_value' => $comment_type->label(),
       '#required' => TRUE,
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
       '#default_value' => $comment_type->id(),
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => '\Drupal\comment\Entity\CommentType::load',
-      ),
+      ],
       '#maxlength' => EntityTypeInterface::BUNDLE_MAX_LENGTH,
       '#disabled' => !$comment_type->isNew(),
-    );
+    ];
 
-    $form['description'] = array(
+    $form['description'] = [
       '#type' => 'textarea',
       '#default_value' => $comment_type->getDescription(),
       '#description' => t('Describe this comment type. The text will be displayed on the <em>Comment types</em> administration overview page.'),
       '#title' => t('Description'),
-    );
+    ];
 
     if ($comment_type->isNew()) {
-      $options = array();
+      $options = [];
       foreach ($this->entityManager->getDefinitions() as $entity_type) {
         // Only expose entities that have field UI enabled, only those can
         // get comment fields added in the UI.
@@ -104,47 +104,47 @@ public function form(array $form, FormStateInterface $form_state) {
           $options[$entity_type->id()] = $entity_type->getLabel();
         }
       }
-      $form['target_entity_type_id'] = array(
+      $form['target_entity_type_id'] = [
         '#type' => 'select',
         '#default_value' => $comment_type->getTargetEntityTypeId(),
         '#title' => t('Target entity type'),
         '#options' => $options,
         '#description' => t('The target entity type can not be changed after the comment type has been created.')
-      );
+      ];
     }
     else {
-      $form['target_entity_type_id_display'] = array(
+      $form['target_entity_type_id_display'] = [
         '#type' => 'item',
         '#markup' => $this->entityManager->getDefinition($comment_type->getTargetEntityTypeId())->getLabel(),
         '#title' => t('Target entity type'),
-      );
+      ];
     }
 
     if ($this->moduleHandler->moduleExists('content_translation')) {
-      $form['language'] = array(
+      $form['language'] = [
         '#type' => 'details',
         '#title' => t('Language settings'),
         '#group' => 'additional_settings',
-      );
+      ];
 
       $language_configuration = ContentLanguageSettings::loadByEntityTypeBundle('comment', $comment_type->id());
-      $form['language']['language_configuration'] = array(
+      $form['language']['language_configuration'] = [
         '#type' => 'language_configuration',
-        '#entity_information' => array(
+        '#entity_information' => [
           'entity_type' => 'comment',
           'bundle' => $comment_type->id(),
-        ),
+        ],
         '#default_value' => $language_configuration,
-      );
+      ];
 
       $form['#submit'][] = 'language_configuration_element_submit';
     }
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => t('Save'),
-    );
+    ];
 
     return $form;
   }
@@ -158,13 +158,13 @@ public function save(array $form, FormStateInterface $form_state) {
 
     $edit_link = $this->entity->link($this->t('Edit'));
     if ($status == SAVED_UPDATED) {
-      drupal_set_message(t('Comment type %label has been updated.', array('%label' => $comment_type->label())));
-      $this->logger->notice('Comment type %label has been updated.', array('%label' => $comment_type->label(), 'link' => $edit_link));
+      drupal_set_message(t('Comment type %label has been updated.', ['%label' => $comment_type->label()]));
+      $this->logger->notice('Comment type %label has been updated.', ['%label' => $comment_type->label(), 'link' => $edit_link]);
     }
     else {
       $this->commentManager->addBodyField($comment_type->id());
-      drupal_set_message(t('Comment type %label has been added.', array('%label' => $comment_type->label())));
-      $this->logger->notice('Comment type %label has been added.', array('%label' => $comment_type->label(), 'link' => $edit_link));
+      drupal_set_message(t('Comment type %label has been added.', ['%label' => $comment_type->label()]));
+      $this->logger->notice('Comment type %label has been added.', ['%label' => $comment_type->label(), 'link' => $edit_link]);
     }
 
     $form_state->setRedirectUrl($comment_type->urlInfo('collection'));
diff --git a/core/modules/comment/src/CommentViewBuilder.php b/core/modules/comment/src/CommentViewBuilder.php
index 5771ed5064c10e5055168b06fcbf70b7a43bb19f..ec6d49a5b07275b7eeaa32a162ed15f8dbf75b9c 100644
--- a/core/modules/comment/src/CommentViewBuilder.php
+++ b/core/modules/comment/src/CommentViewBuilder.php
@@ -88,7 +88,7 @@ public function buildComponents(array &$build, array $entities, array $displays,
     }
 
     // Pre-load associated users into cache to leverage multiple loading.
-    $uids = array();
+    $uids = [];
     foreach ($entities as $entity) {
       $uids[] = $entity->getOwnerId();
     }
@@ -125,7 +125,7 @@ public function buildComponents(array &$build, array $entities, array $displays,
 
       $display = $displays[$entity->bundle()];
       if ($display->getComponent('links')) {
-        $build[$id]['links'] = array(
+        $build[$id]['links'] = [
           '#lazy_builder' => ['comment.lazy_builders:renderLinks', [
             $entity->id(),
             $view_mode,
@@ -133,11 +133,11 @@ public function buildComponents(array &$build, array $entities, array $displays,
             !empty($entity->in_preview),
           ]],
           '#create_placeholder' => TRUE,
-        );
+        ];
       }
 
       if (!isset($build[$id]['#attached'])) {
-        $build[$id]['#attached'] = array();
+        $build[$id]['#attached'] = [];
       }
       $build[$id]['#attached']['library'][] = 'comment/drupal.comment-by-viewer';
       if ($this->moduleHandler->moduleExists('history') && $this->currentUser->isAuthenticated()) {
diff --git a/core/modules/comment/src/CommentViewsData.php b/core/modules/comment/src/CommentViewsData.php
index e4ca5b02595d61d35c0e34b4ef77e8d1f4783131..52af015d59cae94a8cc6851b898e1366cc5dafe1 100644
--- a/core/modules/comment/src/CommentViewsData.php
+++ b/core/modules/comment/src/CommentViewsData.php
@@ -36,148 +36,148 @@ public function getViewsData() {
     $data['comment_field_data']['created']['title'] = $this->t('Post date');
     $data['comment_field_data']['created']['help'] = $this->t('Date and time of when the comment was created.');
 
-    $data['comment_field_data']['created_fulldata'] = array(
+    $data['comment_field_data']['created_fulldata'] = [
       'title' => $this->t('Created date'),
       'help' => $this->t('Date in the form of CCYYMMDD.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_fulldate',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['created_year_month'] = array(
+    $data['comment_field_data']['created_year_month'] = [
       'title' => $this->t('Created year + month'),
       'help' => $this->t('Date in the form of YYYYMM.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_year_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['created_year'] = array(
+    $data['comment_field_data']['created_year'] = [
       'title' => $this->t('Created year'),
       'help' => $this->t('Date in the form of YYYY.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_year',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['created_month'] = array(
+    $data['comment_field_data']['created_month'] = [
       'title' => $this->t('Created month'),
       'help' => $this->t('Date in the form of MM (01 - 12).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['created_day'] = array(
+    $data['comment_field_data']['created_day'] = [
       'title' => $this->t('Created day'),
       'help' => $this->t('Date in the form of DD (01 - 31).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_day',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['created_week'] = array(
+    $data['comment_field_data']['created_week'] = [
       'title' => $this->t('Created week'),
       'help' => $this->t('Date in the form of WW (01 - 53).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_week',
-      ),
-    );
+      ],
+    ];
 
     $data['comment_field_data']['changed']['title'] = $this->t('Updated date');
     $data['comment_field_data']['changed']['help'] = $this->t('Date and time of when the comment was last updated.');
 
-    $data['comment_field_data']['changed_fulldata'] = array(
+    $data['comment_field_data']['changed_fulldata'] = [
       'title' => $this->t('Changed date'),
       'help' => $this->t('Date in the form of CCYYMMDD.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_fulldate',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['changed_year_month'] = array(
+    $data['comment_field_data']['changed_year_month'] = [
       'title' => $this->t('Changed year + month'),
       'help' => $this->t('Date in the form of YYYYMM.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_year_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['changed_year'] = array(
+    $data['comment_field_data']['changed_year'] = [
       'title' => $this->t('Changed year'),
       'help' => $this->t('Date in the form of YYYY.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_year',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['changed_month'] = array(
+    $data['comment_field_data']['changed_month'] = [
       'title' => $this->t('Changed month'),
       'help' => $this->t('Date in the form of MM (01 - 12).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['changed_day'] = array(
+    $data['comment_field_data']['changed_day'] = [
       'title' => $this->t('Changed day'),
       'help' => $this->t('Date in the form of DD (01 - 31).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_day',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['changed_week'] = array(
+    $data['comment_field_data']['changed_week'] = [
       'title' => $this->t('Changed week'),
       'help' => $this->t('Date in the form of WW (01 - 53).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_week',
-      ),
-    );
+      ],
+    ];
 
     $data['comment_field_data']['status']['title'] = $this->t('Approved status');
     $data['comment_field_data']['status']['help'] = $this->t('Whether the comment is approved (or still in the moderation queue).');
     $data['comment_field_data']['status']['filter']['label'] = $this->t('Approved comment status');
     $data['comment_field_data']['status']['filter']['type'] = 'yes-no';
 
-    $data['comment']['approve_comment'] = array(
-      'field' => array(
+    $data['comment']['approve_comment'] = [
+      'field' => [
         'title' => $this->t('Link to approve comment'),
         'help' => $this->t('Provide a simple link to approve the comment.'),
         'id' => 'comment_link_approve',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment']['replyto_comment'] = array(
-      'field' => array(
+    $data['comment']['replyto_comment'] = [
+      'field' => [
         'title' => $this->t('Link to reply-to comment'),
         'help' => $this->t('Provide a simple link to reply to the comment.'),
         'id' => 'comment_link_reply',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_field_data']['thread']['field'] = array(
+    $data['comment_field_data']['thread']['field'] = [
       'title' => $this->t('Depth'),
       'help' => $this->t('Display the depth of the comment if it is threaded.'),
       'id' => 'comment_depth',
-    );
-    $data['comment_field_data']['thread']['sort'] = array(
+    ];
+    $data['comment_field_data']['thread']['sort'] = [
       'title' => $this->t('Thread'),
       'help' => $this->t('Sort by the threaded order. This will keep child comments together with their parents.'),
       'id' => 'comment_thread',
-    );
+    ];
     unset($data['comment_field_data']['thread']['filter']);
     unset($data['comment_field_data']['thread']['argument']);
 
@@ -189,24 +189,24 @@ public function getViewsData() {
         continue;
       }
       if ($fields = \Drupal::service('comment.manager')->getFields($type)) {
-        $data['comment_field_data'][$type] = array(
-          'relationship' => array(
+        $data['comment_field_data'][$type] = [
+          'relationship' => [
             'title' => $entity_type->getLabel(),
-            'help' => $this->t('The @entity_type to which the comment is a reply to.', array('@entity_type' => $entity_type->getLabel())),
+            'help' => $this->t('The @entity_type to which the comment is a reply to.', ['@entity_type' => $entity_type->getLabel()]),
             'base' => $entity_type->getDataTable() ?: $entity_type->getBaseTable(),
             'base field' => $entity_type->getKey('id'),
             'relationship field' => 'entity_id',
             'id' => 'standard',
             'label' => $entity_type->getLabel(),
-            'extra' => array(
-              array(
+            'extra' => [
+              [
                 'field' => 'entity_type',
                 'value' => $type,
                 'table' => 'comment_field_data'
-              ),
-            ),
-          ),
-        );
+              ],
+            ],
+          ],
+        ];
       }
     }
 
@@ -237,84 +237,84 @@ public function getViewsData() {
       // {comment_entity_statistics} for each field as multiple joins between
       // the same two tables is not supported.
       if (\Drupal::service('comment.manager')->getFields($type)) {
-        $data['comment_entity_statistics']['table']['join'][$entity_type->getDataTable() ?: $entity_type->getBaseTable()] = array(
+        $data['comment_entity_statistics']['table']['join'][$entity_type->getDataTable() ?: $entity_type->getBaseTable()] = [
           'type' => 'INNER',
           'left_field' => $entity_type->getKey('id'),
           'field' => 'entity_id',
-          'extra' => array(
-            array(
+          'extra' => [
+            [
               'field' => 'entity_type',
               'value' => $type,
-            ),
-          ),
-        );
+            ],
+          ],
+        ];
       }
     }
 
-    $data['comment_entity_statistics']['last_comment_timestamp'] = array(
+    $data['comment_entity_statistics']['last_comment_timestamp'] = [
       'title' => $this->t('Last comment time'),
       'help' => $this->t('Date and time of when the last comment was posted.'),
-      'field' => array(
+      'field' => [
         'id' => 'comment_last_timestamp',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'date',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'date',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_entity_statistics']['last_comment_name'] = array(
+    $data['comment_entity_statistics']['last_comment_name'] = [
       'title' => $this->t("Last comment author"),
       'help' => $this->t('The name of the author of the last posted comment.'),
-      'field' => array(
+      'field' => [
         'id' => 'comment_ces_last_comment_name',
         'no group by' => TRUE,
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'comment_ces_last_comment_name',
         'no group by' => TRUE,
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_entity_statistics']['comment_count'] = array(
+    $data['comment_entity_statistics']['comment_count'] = [
       'title' => $this->t('Comment count'),
       'help' => $this->t('The number of comments an entity has.'),
-      'field' => array(
+      'field' => [
         'id' => 'numeric',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'numeric',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'standard',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_entity_statistics']['last_updated'] = array(
+    $data['comment_entity_statistics']['last_updated'] = [
       'title' => $this->t('Updated/commented date'),
       'help' => $this->t('The most recent of last comment posted or entity updated time.'),
-      'field' => array(
+      'field' => [
         'id' => 'comment_ces_last_updated',
         'no group by' => TRUE,
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'comment_ces_last_updated',
         'no group by' => TRUE,
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'comment_ces_last_updated',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_entity_statistics']['cid'] = array(
+    $data['comment_entity_statistics']['cid'] = [
       'title' => $this->t('Last comment CID'),
       'help' => $this->t('Display the last comment of an entity'),
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('Last comment'),
         'help' => $this->t('The last comment of an entity.'),
         'group' => $this->t('Comment'),
@@ -322,62 +322,62 @@ public function getViewsData() {
         'base field' => 'cid',
         'id' => 'standard',
         'label' => $this->t('Last Comment'),
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_entity_statistics']['last_comment_uid'] = array(
+    $data['comment_entity_statistics']['last_comment_uid'] = [
       'title' => $this->t('Last comment uid'),
       'help' => $this->t('The User ID of the author of the last comment of an entity.'),
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('Last comment author'),
         'base' => 'users',
         'base field' => 'uid',
         'id' => 'standard',
         'label' => $this->t('Last comment author'),
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'numeric',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'numeric',
-      ),
-      'field' => array(
+      ],
+      'field' => [
         'id' => 'numeric',
-      ),
-    );
+      ],
+    ];
 
-    $data['comment_entity_statistics']['entity_type'] = array(
+    $data['comment_entity_statistics']['entity_type'] = [
       'title' => $this->t('Entity type'),
       'help' => $this->t('The entity type to which the comment is a reply to.'),
-      'field' => array(
+      'field' => [
         'id' => 'standard',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'string',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'string',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['comment_entity_statistics']['field_name'] = array(
+      ],
+    ];
+    $data['comment_entity_statistics']['field_name'] = [
       'title' => $this->t('Comment field name'),
       'help' => $this->t('The field name from which the comment originated.'),
-      'field' => array(
+      'field' => [
         'id' => 'standard',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'string',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'string',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
+      ],
+    ];
 
     return $data;
   }
diff --git a/core/modules/comment/src/Controller/CommentController.php b/core/modules/comment/src/Controller/CommentController.php
index 5f1b504b634b0ab9d501d1943122aff0e5f5bf8c..c834fa67a1cc818fd5f347105b15aa321549f2d6 100644
--- a/core/modules/comment/src/Controller/CommentController.php
+++ b/core/modules/comment/src/Controller/CommentController.php
@@ -125,7 +125,7 @@ public function commentPermalink(Request $request, CommentInterface $comment) {
       $page = $this->entityManager()->getStorage('comment')->getDisplayOrdinal($comment, $field_definition->getSetting('default_mode'), $field_definition->getSetting('per_page'));
       // @todo: Cleaner sub request handling.
       $subrequest_url = $entity->urlInfo()->setOption('query', ['page' => $page])->toString(TRUE);
-      $redirect_request = Request::create($subrequest_url->getGeneratedUrl(), 'GET', $request->query->all(), $request->cookies->all(), array(), $request->server->all());
+      $redirect_request = Request::create($subrequest_url->getGeneratedUrl(), 'GET', $request->query->all(), $request->cookies->all(), [], $request->server->all());
       // Carry over the session to the subrequest.
       if ($session = $request->getSession()) {
         $redirect_request->setSession($session);
@@ -174,11 +174,11 @@ public function redirectNode(EntityInterface $node) {
     // Legacy nodes only had a single comment field, so use the first comment
     // field on the entity.
     if (!empty($fields) && ($field_names = array_keys($fields)) && ($field_name = reset($field_names))) {
-      return $this->redirect('comment.reply', array(
+      return $this->redirect('comment.reply', [
         'entity_type' => 'node',
         'entity' => $node->id(),
         'field_name' => $field_name,
-      ));
+      ]);
     }
     throw new NotFoundHttpException();
   }
@@ -211,7 +211,7 @@ public function redirectNode(EntityInterface $node) {
    */
   public function getReplyForm(Request $request, EntityInterface $entity, $field_name, $pid = NULL) {
     $account = $this->currentUser();
-    $build = array();
+    $build = [];
 
     // The user is not just previewing a comment.
     if ($request->request->get('op') != $this->t('Preview')) {
@@ -240,12 +240,12 @@ public function getReplyForm(Request $request, EntityInterface $entity, $field_n
     }
 
     // Show the actual reply box.
-    $comment = $this->entityManager()->getStorage('comment')->create(array(
+    $comment = $this->entityManager()->getStorage('comment')->create([
       'entity_id' => $entity->id(),
       'pid' => $pid,
       'entity_type' => $entity->getEntityTypeId(),
       'field_name' => $field_name,
-    ));
+    ]);
     $build['comment_form'] = $this->entityFormBuilder()->getForm($comment);
 
     return $build;
@@ -324,17 +324,17 @@ public function renderNewCommentsNodeLinks(Request $request) {
     // Only handle up to 100 nodes.
     $nids = array_slice($nids, 0, 100);
 
-    $links = array();
+    $links = [];
     foreach ($nids as $nid) {
       $node = $this->entityManager->getStorage('node')->load($nid);
       $new = $this->commentManager->getCountNewComments($node);
       $page_number = $this->entityManager()->getStorage('comment')
         ->getNewCommentPageNumber($node->{$field_name}->comment_count, $new, $node, $field_name);
-      $query = $page_number ? array('page' => $page_number) : NULL;
-      $links[$nid] = array(
+      $query = $page_number ? ['page' => $page_number] : NULL;
+      $links[$nid] = [
         'new_comment_count' => (int) $new,
-        'first_new_comment_link' => $this->getUrlGenerator()->generateFromRoute('entity.node.canonical', array('node' => $node->id()), array('query' => $query, 'fragment' => 'new')),
-      );
+        'first_new_comment_link' => $this->getUrlGenerator()->generateFromRoute('entity.node.canonical', ['node' => $node->id()], ['query' => $query, 'fragment' => 'new']),
+      ];
     }
 
     return new JsonResponse($links);
diff --git a/core/modules/comment/src/Entity/Comment.php b/core/modules/comment/src/Entity/Comment.php
index d52f04dcbb9a0655cf6e005b894c0e1c5019f94e..83dffaa9e534279066cef5bbaf323d7b4ca4a1a3 100644
--- a/core/modules/comment/src/Entity/Comment.php
+++ b/core/modules/comment/src/Entity/Comment.php
@@ -249,11 +249,11 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('Subject'))
       ->setTranslatable(TRUE)
       ->setSetting('max_length', 64)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         // Default comment body field has weight 20.
         'weight' => 10,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['uid'] = BaseFieldDefinition::create('entity_reference')
@@ -328,7 +328,7 @@ public static function bundleFieldDefinitions(EntityTypeInterface $entity_type,
       $fields['entity_id']->setSetting('target_type', $comment_type->getTargetEntityTypeId());
       return $fields;
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/comment/src/Form/CommentAdminOverview.php b/core/modules/comment/src/Form/CommentAdminOverview.php
index 3966fca1bfcc88911678de8e0575404e519f9740..24f8b0aa2e6dad12d525cfd0860262edb98cf26c 100644
--- a/core/modules/comment/src/Form/CommentAdminOverview.php
+++ b/core/modules/comment/src/Form/CommentAdminOverview.php
@@ -99,12 +99,12 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state, $type = 'new') {
 
     // Build an 'Update options' form.
-    $form['options'] = array(
+    $form['options'] = [
       '#type' => 'details',
       '#title' => $this->t('Update options'),
       '#open' => TRUE,
-      '#attributes' => array('class' => array('container-inline')),
-    );
+      '#attributes' => ['class' => ['container-inline']],
+    ];
 
     if ($type == 'approval') {
       $options['publish'] = $this->t('Publish the selected comments');
@@ -114,42 +114,42 @@ public function buildForm(array $form, FormStateInterface $form_state, $type = '
     }
     $options['delete'] = $this->t('Delete the selected comments');
 
-    $form['options']['operation'] = array(
+    $form['options']['operation'] = [
       '#type' => 'select',
       '#title' => $this->t('Action'),
       '#title_display' => 'invisible',
       '#options' => $options,
       '#default_value' => 'publish',
-    );
-    $form['options']['submit'] = array(
+    ];
+    $form['options']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Update'),
-    );
+    ];
 
     // Load the comments that need to be displayed.
     $status = ($type == 'approval') ? CommentInterface::NOT_PUBLISHED : CommentInterface::PUBLISHED;
-    $header = array(
-      'subject' => array(
+    $header = [
+      'subject' => [
         'data' => $this->t('Subject'),
         'specifier' => 'subject',
-      ),
-      'author' => array(
+      ],
+      'author' => [
         'data' => $this->t('Author'),
         'specifier' => 'name',
-        'class' => array(RESPONSIVE_PRIORITY_MEDIUM),
-      ),
-      'posted_in' => array(
+        'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+      ],
+      'posted_in' => [
         'data' => $this->t('Posted in'),
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      ),
-      'changed' => array(
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ],
+      'changed' => [
         'data' => $this->t('Updated'),
         'specifier' => 'changed',
         'sort' => 'desc',
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      ),
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ],
       'operations' => $this->t('Operations'),
-    );
+    ];
     $cids = $this->commentStorage->getQuery()
       ->condition('status', $status)
       ->tableSort($header)
@@ -160,11 +160,11 @@ public function buildForm(array $form, FormStateInterface $form_state, $type = '
     $comments = $this->commentStorage->loadMultiple($cids);
 
     // Build a table listing the appropriate comments.
-    $options = array();
+    $options = [];
     $destination = $this->getDestinationArray();
 
-    $commented_entity_ids = array();
-    $commented_entities = array();
+    $commented_entity_ids = [];
+    $commented_entities = [];
 
     foreach ($comments as $comment) {
       $commented_entity_ids[$comment->getCommentedEntityTypeId()][] = $comment->getCommentedEntityId();
@@ -179,61 +179,61 @@ public function buildForm(array $form, FormStateInterface $form_state, $type = '
       $commented_entity = $commented_entities[$comment->getCommentedEntityTypeId()][$comment->getCommentedEntityId()];
       $comment_permalink = $comment->permalink();
       if ($comment->hasField('comment_body') && ($body = $comment->get('comment_body')->value)) {
-        $attributes = $comment_permalink->getOption('attributes') ?: array();
-        $attributes += array('title' => Unicode::truncate($body, 128));
+        $attributes = $comment_permalink->getOption('attributes') ?: [];
+        $attributes += ['title' => Unicode::truncate($body, 128)];
         $comment_permalink->setOption('attributes', $attributes);
       }
-      $options[$comment->id()] = array(
-        'title' => array('data' => array('#title' => $comment->getSubject() ?: $comment->id())),
-        'subject' => array(
-          'data' => array(
+      $options[$comment->id()] = [
+        'title' => ['data' => ['#title' => $comment->getSubject() ?: $comment->id()]],
+        'subject' => [
+          'data' => [
             '#type' => 'link',
             '#title' => $comment->getSubject(),
             '#url' => $comment_permalink,
-          ),
-        ),
-        'author' => array(
-          'data' => array(
+          ],
+        ],
+        'author' => [
+          'data' => [
             '#theme' => 'username',
             '#account' => $comment->getOwner(),
-          ),
-        ),
-        'posted_in' => array(
-          'data' => array(
+          ],
+        ],
+        'posted_in' => [
+          'data' => [
             '#type' => 'link',
             '#title' => $commented_entity->label(),
             '#access' => $commented_entity->access('view'),
             '#url' => $commented_entity->urlInfo(),
-          ),
-        ),
+          ],
+        ],
         'changed' => $this->dateFormatter->format($comment->getChangedTimeAcrossTranslations(), 'short'),
-      );
+      ];
       $comment_uri_options = $comment->urlInfo()->getOptions() + ['query' => $destination];
-      $links = array();
-      $links['edit'] = array(
+      $links = [];
+      $links['edit'] = [
         'title' => $this->t('Edit'),
         'url' => $comment->urlInfo('edit-form', $comment_uri_options),
-      );
-      if ($this->moduleHandler->moduleExists('content_translation') && $this->moduleHandler->invoke('content_translation', 'translate_access', array($comment))->isAllowed()) {
-        $links['translate'] = array(
+      ];
+      if ($this->moduleHandler->moduleExists('content_translation') && $this->moduleHandler->invoke('content_translation', 'translate_access', [$comment])->isAllowed()) {
+        $links['translate'] = [
           'title' => $this->t('Translate'),
           'url' => $comment->urlInfo('drupal:content-translation-overview', $comment_uri_options),
-        );
+        ];
       }
-      $options[$comment->id()]['operations']['data'] = array(
+      $options[$comment->id()]['operations']['data'] = [
         '#type' => 'operations',
         '#links' => $links,
-      );
+      ];
     }
 
-    $form['comments'] = array(
+    $form['comments'] = [
       '#type' => 'tableselect',
       '#header' => $header,
       '#options' => $options,
       '#empty' => $this->t('No comments available.'),
-    );
+    ];
 
-    $form['pager'] = array('#type' => 'pager');
+    $form['pager'] = ['#type' => 'pager'];
 
     return $form;
   }
@@ -242,7 +242,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $type = '
    * {@inheritdoc}
    */
   public function validateForm(array &$form, FormStateInterface $form_state) {
-    $form_state->setValue('comments', array_diff($form_state->getValue('comments'), array(0)));
+    $form_state->setValue('comments', array_diff($form_state->getValue('comments'), [0]));
     // We can't execute any 'Update options' if no comments were selected.
     if (count($form_state->getValue('comments')) == 0) {
       $form_state->setErrorByName('', $this->t('Select one or more comments to perform the update on.'));
diff --git a/core/modules/comment/src/Form/CommentTypeDeleteForm.php b/core/modules/comment/src/Form/CommentTypeDeleteForm.php
index 8c3da7a20ee6d835c4e8419b64ebd00fd3902ec8..30181c1d9b820596cbaedcc70a3b5b1ad5644556 100644
--- a/core/modules/comment/src/Form/CommentTypeDeleteForm.php
+++ b/core/modules/comment/src/Form/CommentTypeDeleteForm.php
@@ -82,18 +82,18 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     foreach (array_keys($this->commentManager->getFields($entity_type)) as $field_name) {
       /** @var \Drupal\field\FieldStorageConfigInterface $field_storage */
       if (($field_storage = FieldStorageConfig::loadByName($entity_type, $field_name)) && $field_storage->getSetting('comment_type') == $this->entity->id() && !$field_storage->isDeleted()) {
-        $caption .= '<p>' . $this->t('%label is used by the %field field on your site. You can not remove this comment type until you have removed the field.', array(
+        $caption .= '<p>' . $this->t('%label is used by the %field field on your site. You can not remove this comment type until you have removed the field.', [
           '%label' => $this->entity->label(),
           '%field' => $field_storage->label(),
-        )) . '</p>';
+        ]) . '</p>';
       }
     }
 
     if (!empty($comments)) {
-      $caption .= '<p>' . $this->formatPlural(count($comments), '%label is used by 1 comment on your site. You can not remove this comment type until you have removed all of the %label comments.', '%label is used by @count comments on your site. You may not remove %label until you have removed all of the %label comments.', array('%label' => $this->entity->label())) . '</p>';
+      $caption .= '<p>' . $this->formatPlural(count($comments), '%label is used by 1 comment on your site. You can not remove this comment type until you have removed all of the %label comments.', '%label is used by @count comments on your site. You may not remove %label until you have removed all of the %label comments.', ['%label' => $this->entity->label()]) . '</p>';
     }
     if ($caption) {
-      $form['description'] = array('#markup' => $caption);
+      $form['description'] = ['#markup' => $caption];
       return $form;
     }
     else {
diff --git a/core/modules/comment/src/Form/ConfirmDeleteMultiple.php b/core/modules/comment/src/Form/ConfirmDeleteMultiple.php
index c66e428e92b6d4910ffad5f76b8293d424c8f418..590624831632a47541b5d7c3f394bc90cf727533 100644
--- a/core/modules/comment/src/Form/ConfirmDeleteMultiple.php
+++ b/core/modules/comment/src/Form/ConfirmDeleteMultiple.php
@@ -81,25 +81,25 @@ public function getConfirmText() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $edit = $form_state->getUserInput();
 
-    $form['comments'] = array(
+    $form['comments'] = [
       '#prefix' => '<ul>',
       '#suffix' => '</ul>',
       '#tree' => TRUE,
-    );
+    ];
     // array_filter() returns only elements with actual values.
     $comment_counter = 0;
     $this->comments = $this->commentStorage->loadMultiple(array_keys(array_filter($edit['comments'])));
     foreach ($this->comments as $comment) {
       $cid = $comment->id();
-      $form['comments'][$cid] = array(
+      $form['comments'][$cid] = [
         '#type' => 'hidden',
         '#value' => $cid,
         '#prefix' => '<li>',
         '#suffix' => Html::escape($comment->label()) . '</li>'
-      );
+      ];
       $comment_counter++;
     }
-    $form['operation'] = array('#type' => 'hidden', '#value' => 'delete');
+    $form['operation'] = ['#type' => 'hidden', '#value' => 'delete'];
 
     if (!$comment_counter) {
       drupal_set_message($this->t('There do not appear to be any comments to delete, or your selected comment was deleted by another administrator.'));
@@ -116,7 +116,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if ($form_state->getValue('confirm')) {
       $this->commentStorage->delete($this->comments);
       $count = count($form_state->getValue('comments'));
-      $this->logger('comment')->notice('Deleted @count comments.', array('@count' => $count));
+      $this->logger('comment')->notice('Deleted @count comments.', ['@count' => $count]);
       drupal_set_message($this->formatPlural($count, 'Deleted 1 comment.', 'Deleted @count comments.'));
     }
     $form_state->setRedirectUrl($this->getCancelUrl());
diff --git a/core/modules/comment/src/Form/DeleteForm.php b/core/modules/comment/src/Form/DeleteForm.php
index 285abe58ef055efc6df127f02c8cae796dee4a98..fa7ab9d2070c2ec45433e33c140466fb707f4d82 100644
--- a/core/modules/comment/src/Form/DeleteForm.php
+++ b/core/modules/comment/src/Form/DeleteForm.php
@@ -42,7 +42,7 @@ protected function getDeletionMessage() {
    * {@inheritdoc}
    */
   public function logDeletionMessage() {
-    $this->logger('comment')->notice('Deleted comment @cid and its replies.', array('@cid' => $this->entity->id()));
+    $this->logger('comment')->notice('Deleted comment @cid and its replies.', ['@cid' => $this->entity->id()]);
   }
 
 }
diff --git a/core/modules/comment/src/Plugin/Action/UnpublishByKeywordComment.php b/core/modules/comment/src/Plugin/Action/UnpublishByKeywordComment.php
index cacac89f660ce899671655d062bfe6114b0cbae1..ec1b268d7bd6e6f254add2205489d7f94046ec3d 100644
--- a/core/modules/comment/src/Plugin/Action/UnpublishByKeywordComment.php
+++ b/core/modules/comment/src/Plugin/Action/UnpublishByKeywordComment.php
@@ -89,21 +89,21 @@ public function execute($comment = NULL) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
-      'keywords' => array(),
-    );
+    return [
+      'keywords' => [],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['keywords'] = array(
+    $form['keywords'] = [
       '#title' => $this->t('Keywords'),
       '#type' => 'textarea',
       '#description' => $this->t('The comment will be unpublished if it contains any of the phrases above. Use a case-sensitive, comma-separated list of phrases. Example: funny, bungee jumping, "Company, Inc."'),
       '#default_value' => Tags::implode($this->configuration['keywords']),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/comment/src/Plugin/Field/FieldFormatter/AuthorNameFormatter.php b/core/modules/comment/src/Plugin/Field/FieldFormatter/AuthorNameFormatter.php
index 43542a0eb57d965a06a3b66e5880286edc532962..3e22ede6e367d2b2711ae7fdd7a6e5606915302e 100644
--- a/core/modules/comment/src/Plugin/Field/FieldFormatter/AuthorNameFormatter.php
+++ b/core/modules/comment/src/Plugin/Field/FieldFormatter/AuthorNameFormatter.php
@@ -24,19 +24,19 @@ class AuthorNameFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
       /** @var $comment \Drupal\comment\CommentInterface */
       $comment = $item->getEntity();
       $account = $comment->getOwner();
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#theme' => 'username',
         '#account' => $account,
-        '#cache' => array(
+        '#cache' => [
           'tags' => $account->getCacheTags() + $comment->getCacheTags(),
-        ),
-      );
+        ],
+      ];
     }
 
     return $elements;
diff --git a/core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php b/core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
index c7d9bba85fb6d95b06e83b559fceeba5458a710f..b03accc489366f390ec9e340abddaeca30ba3168 100644
--- a/core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
+++ b/core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
@@ -36,10 +36,10 @@ class CommentDefaultFormatter extends FormatterBase implements ContainerFactoryP
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'view_mode' => 'default',
       'pager_id' => 0,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -141,8 +141,8 @@ public function __construct($plugin_id, $plugin_definition, FieldDefinitionInter
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
-    $output = array();
+    $elements = [];
+    $output = [];
 
     $field_name = $this->fieldDefinition->getName();
     $entity = $items->getEntity();
@@ -153,7 +153,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
       // Comments are added to the search results and search index by
       // comment_node_update_index() instead of by this formatter, so don't
       // return anything if the view mode is search_index or search_result.
-      !in_array($this->viewMode, array('search_result', 'search_index'))) {
+      !in_array($this->viewMode, ['search_result', 'search_index'])) {
       $comment_settings = $this->getFieldSettings();
 
       // Only attempt to render comments if the entity has visible comments.
@@ -203,12 +203,12 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
         }
       }
 
-      $elements[] = $output + array(
+      $elements[] = $output + [
         '#comment_type' => $this->getFieldSetting('comment_type'),
         '#comment_display_mode' => $this->getFieldSetting('default_mode'),
-        'comments' => array(),
-        'comment_form' => array(),
-      );
+        'comments' => [],
+        'comment_form' => [],
+      ];
     }
 
     return $elements;
@@ -218,7 +218,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element = array();
+    $element = [];
     $view_modes = $this->getViewModes();
     $element['view_mode'] = [
       '#type' => 'select',
@@ -229,13 +229,13 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
       // Only show the select element when there are more than one options.
       '#access' => count($view_modes) > 1,
     ];
-    $element['pager_id'] = array(
+    $element['pager_id'] = [
       '#type' => 'select',
       '#title' => $this->t('Pager ID'),
       '#options' => range(0, 10),
       '#default_value' => $this->getSetting('pager_id'),
       '#description' => $this->t("Unless you're experiencing problems with pagers related to this field, you should leave this at 0. If using multiple pagers on one page you may need to set this number to a higher value so as not to conflict within the ?page= array. Large values will add a lot of commas to your URLs, so avoid if possible."),
-    );
+    ];
     return $element;
   }
 
diff --git a/core/modules/comment/src/Plugin/Field/FieldType/CommentItem.php b/core/modules/comment/src/Plugin/Field/FieldType/CommentItem.php
index 888b64b255c782636bf50c168b6ee179fb7ef7bc..e3fd2b060eb937f16754e22376ddc00d7e3671cc 100644
--- a/core/modules/comment/src/Plugin/Field/FieldType/CommentItem.php
+++ b/core/modules/comment/src/Plugin/Field/FieldType/CommentItem.php
@@ -31,22 +31,22 @@ class CommentItem extends FieldItemBase implements CommentItemInterface {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'comment_type' => '',
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'default_mode' => CommentManagerInterface::COMMENT_MODE_THREADED,
       'per_page' => 50,
       'form_location' => CommentItemInterface::FORM_BELOW,
       'anonymous' => COMMENT_ANONYMOUS_MAYNOT_CONTACT,
       'preview' => DRUPAL_OPTIONAL,
-    ) + parent::defaultFieldSettings();
+    ] + parent::defaultFieldSettings();
   }
 
   /**
@@ -82,36 +82,36 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'status' => array(
+    return [
+      'columns' => [
+        'status' => [
           'description' => 'Whether comments are allowed on this entity: 0 = no, 1 = closed (read only), 2 = open (read/write).',
           'type' => 'int',
           'default' => 0,
-        ),
-      ),
-      'indexes' => array(),
-      'foreign keys' => array(),
-    );
+        ],
+      ],
+      'indexes' => [],
+      'foreign keys' => [],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
-    $element = array();
+    $element = [];
 
     $settings = $this->getSettings();
 
     $anonymous_user = new AnonymousUserSession();
 
-    $element['default_mode'] = array(
+    $element['default_mode'] = [
       '#type' => 'checkbox',
       '#title' => t('Threading'),
       '#default_value' => $settings['default_mode'],
       '#description' => t('Show comment replies in a threaded list.'),
-    );
-    $element['per_page'] = array(
+    ];
+    $element['per_page'] = [
       '#type' => 'number',
       '#title' => t('Comments per page'),
       '#default_value' => $settings['per_page'],
@@ -119,33 +119,33 @@ public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
       '#min' => 10,
       '#max' => 1000,
       '#step' => 10,
-    );
-    $element['anonymous'] = array(
+    ];
+    $element['anonymous'] = [
       '#type' => 'select',
       '#title' => t('Anonymous commenting'),
       '#default_value' => $settings['anonymous'],
-      '#options' => array(
+      '#options' => [
         COMMENT_ANONYMOUS_MAYNOT_CONTACT => t('Anonymous posters may not enter their contact information'),
         COMMENT_ANONYMOUS_MAY_CONTACT => t('Anonymous posters may leave their contact information'),
         COMMENT_ANONYMOUS_MUST_CONTACT => t('Anonymous posters must leave their contact information'),
-      ),
+      ],
       '#access' => $anonymous_user->hasPermission('post comments'),
-    );
-    $element['form_location'] = array(
+    ];
+    $element['form_location'] = [
       '#type' => 'checkbox',
       '#title' => t('Show reply form on the same page as comments'),
       '#default_value' => $settings['form_location'],
-    );
-    $element['preview'] = array(
+    ];
+    $element['preview'] = [
       '#type' => 'radios',
       '#title' => t('Preview comment'),
       '#default_value' => $settings['preview'],
-      '#options' => array(
+      '#options' => [
         DRUPAL_DISABLED => t('Disabled'),
         DRUPAL_OPTIONAL => t('Optional'),
         DRUPAL_REQUIRED => t('Required'),
-      ),
-    );
+      ],
+    ];
 
     return $element;
   }
@@ -171,27 +171,27 @@ public function isEmpty() {
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $element = array();
+    $element = [];
 
     // @todo Inject entity storage once typed-data supports container injection.
     //   See https://www.drupal.org/node/2053415 for more details.
     $comment_types = CommentType::loadMultiple();
-    $options = array();
+    $options = [];
     $entity_type = $this->getEntity()->getEntityTypeId();
     foreach ($comment_types as $comment_type) {
       if ($comment_type->getTargetEntityTypeId() == $entity_type) {
         $options[$comment_type->id()] = $comment_type->label();
       }
     }
-    $element['comment_type'] = array(
+    $element['comment_type'] = [
       '#type' => 'select',
       '#title' => t('Comment type'),
       '#options' => $options,
       '#required' => TRUE,
-      '#description' => $this->t('Select the Comment type to use for this comment field. Manage the comment types from the <a href=":url">administration overview page</a>.', array(':url' => $this->url('entity.comment_type.collection'))),
+      '#description' => $this->t('Select the Comment type to use for this comment field. Manage the comment types from the <a href=":url">administration overview page</a>.', [':url' => $this->url('entity.comment_type.collection')]),
       '#default_value' => $this->getSetting('comment_type'),
       '#disabled' => $has_data,
-    );
+    ];
     return $element;
   }
 
diff --git a/core/modules/comment/src/Plugin/Field/FieldWidget/CommentWidget.php b/core/modules/comment/src/Plugin/Field/FieldWidget/CommentWidget.php
index 818226d053a0afb01d6aea5fb236a53b086e86f7..c9478f622c29a819ce08f840dfa701819cf0e134 100644
--- a/core/modules/comment/src/Plugin/Field/FieldWidget/CommentWidget.php
+++ b/core/modules/comment/src/Plugin/Field/FieldWidget/CommentWidget.php
@@ -27,26 +27,26 @@ class CommentWidget extends WidgetBase {
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
     $entity = $items->getEntity();
 
-    $element['status'] = array(
+    $element['status'] = [
       '#type' => 'radios',
       '#title' => t('Comments'),
       '#title_display' => 'invisible',
       '#default_value' => $items->status,
-      '#options' => array(
+      '#options' => [
         CommentItemInterface::OPEN => t('Open'),
         CommentItemInterface::CLOSED => t('Closed'),
         CommentItemInterface::HIDDEN => t('Hidden'),
-      ),
-      CommentItemInterface::OPEN => array(
+      ],
+      CommentItemInterface::OPEN => [
         '#description' => t('Users with the "Post comments" permission can post comments.'),
-      ),
-      CommentItemInterface::CLOSED => array(
+      ],
+      CommentItemInterface::CLOSED => [
         '#description' => t('Users cannot post comments, but existing comments will be displayed.'),
-      ),
-      CommentItemInterface::HIDDEN => array(
+      ],
+      CommentItemInterface::HIDDEN => [
         '#description' => t('Comments are hidden from view.'),
-      ),
-    );
+      ],
+    ];
     // If the entity doesn't have any comments, the "hidden" option makes no
     // sense, so don't even bother presenting it to the user unless this is the
     // default value widget on the field settings form.
@@ -65,19 +65,19 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       // Override widget title to be helpful for end users.
       $element['#title'] = $this->t('Comment settings');
 
-      $element += array(
+      $element += [
         '#type' => 'details',
         // Open the details when the selected value is different to the stored
         // default values for the field.
         '#open' => ($items->status != $field_default_values[0]['status']),
         '#group' => 'advanced',
-        '#attributes' => array(
-          'class' => array('comment-' . Html::getClass($entity->getEntityTypeId()) . '-settings-form'),
-        ),
-        '#attached' => array(
-          'library' => array('comment/drupal.comment'),
-        ),
-      );
+        '#attributes' => [
+          'class' => ['comment-' . Html::getClass($entity->getEntityTypeId()) . '-settings-form'],
+        ],
+        '#attached' => [
+          'library' => ['comment/drupal.comment'],
+        ],
+      ];
     }
 
     return $element;
@@ -90,13 +90,13 @@ public function massageFormValues(array $values, array $form, FormStateInterface
     // Add default values for statistics properties because we don't want to
     // have them in form.
     foreach ($values as &$value) {
-      $value += array(
+      $value += [
         'cid' => 0,
         'last_comment_timestamp' => 0,
         'last_comment_name' => '',
         'last_comment_uid' => 0,
         'comment_count' => 0,
-      );
+      ];
     }
     return $values;
   }
diff --git a/core/modules/comment/src/Plugin/Menu/LocalTask/UnapprovedComments.php b/core/modules/comment/src/Plugin/Menu/LocalTask/UnapprovedComments.php
index 5fa019365197954f297d0d286d1841e36b67a62e..89542d34ff3f04ee17ec816c70aa84eb13f08c6f 100644
--- a/core/modules/comment/src/Plugin/Menu/LocalTask/UnapprovedComments.php
+++ b/core/modules/comment/src/Plugin/Menu/LocalTask/UnapprovedComments.php
@@ -54,7 +54,7 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function getTitle() {
-    return $this->t('Unapproved comments (@count)', array('@count' => $this->commentStorage->getUnapprovedCount()));
+    return $this->t('Unapproved comments (@count)', ['@count' => $this->commentStorage->getUnapprovedCount()]);
   }
 
 }
diff --git a/core/modules/comment/src/Plugin/Validation/Constraint/CommentNameConstraintValidator.php b/core/modules/comment/src/Plugin/Validation/Constraint/CommentNameConstraintValidator.php
index f06dfd83831c317638ea71a51cb7eafd228544fa..87cdaf91dedf84c514f150b8f503050bb27ad1cf 100644
--- a/core/modules/comment/src/Plugin/Validation/Constraint/CommentNameConstraintValidator.php
+++ b/core/modules/comment/src/Plugin/Validation/Constraint/CommentNameConstraintValidator.php
@@ -55,9 +55,9 @@ public function validate($entity, Constraint $constraint) {
     // Do not allow unauthenticated comment authors to use a name that is
     // taken by a registered user.
     if (isset($author_name) && $author_name !== '' && $owner_id === 0) {
-      $users = $this->userStorage->loadByProperties(array('name' => $author_name));
+      $users = $this->userStorage->loadByProperties(['name' => $author_name]);
       if (!empty($users)) {
-        $this->context->buildViolation($constraint->messageNameTaken, array('%name' => $author_name))
+        $this->context->buildViolation($constraint->messageNameTaken, ['%name' => $author_name])
           ->atPath('name')
           ->addViolation();
       }
diff --git a/core/modules/comment/src/Plugin/migrate/destination/EntityComment.php b/core/modules/comment/src/Plugin/migrate/destination/EntityComment.php
index a3e82af61b180b7cdfca64ddfecf756314493e81..efce666a77f5fcdb363c37080e21369df4bec4d1 100644
--- a/core/modules/comment/src/Plugin/migrate/destination/EntityComment.php
+++ b/core/modules/comment/src/Plugin/migrate/destination/EntityComment.php
@@ -80,7 +80,7 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     if ($row->isStub() && ($state = $this->state->get('comment.maintain_entity_statistics', 0))) {
       $this->state->set('comment.maintain_entity_statistics', 0);
     }
diff --git a/core/modules/comment/src/Plugin/migrate/destination/EntityCommentType.php b/core/modules/comment/src/Plugin/migrate/destination/EntityCommentType.php
index b014af3fad6e685603deb6749618626b6f3577a5..9bee87a3a1dca959a2322aacdd6d2308b0dc2d09 100644
--- a/core/modules/comment/src/Plugin/migrate/destination/EntityCommentType.php
+++ b/core/modules/comment/src/Plugin/migrate/destination/EntityCommentType.php
@@ -15,7 +15,7 @@ class EntityCommentType extends EntityConfigBase {
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     $entity_ids = parent::import($row, $old_destination_id_values);
     \Drupal::service('comment.manager')->addBodyField(reset($entity_ids));
     return $entity_ids;
diff --git a/core/modules/comment/src/Plugin/migrate/source/d6/Comment.php b/core/modules/comment/src/Plugin/migrate/source/d6/Comment.php
index 6081f39f91facf4a7922beb21e804f36e31e74ca..93f77a0e3f5ba3f90d1198c333d56864e697e7c8 100644
--- a/core/modules/comment/src/Plugin/migrate/source/d6/Comment.php
+++ b/core/modules/comment/src/Plugin/migrate/source/d6/Comment.php
@@ -20,11 +20,11 @@ class Comment extends DrupalSqlBase {
    */
   public function query() {
     $query = $this->select('comments', 'c')
-      ->fields('c', array('cid', 'pid', 'nid', 'uid', 'subject',
+      ->fields('c', ['cid', 'pid', 'nid', 'uid', 'subject',
         'comment', 'hostname', 'timestamp', 'status', 'thread', 'name',
-        'mail', 'homepage', 'format'));
+        'mail', 'homepage', 'format']);
     $query->innerJoin('node', 'n', 'c.nid = n.nid');
-    $query->fields('n', array('type'));
+    $query->fields('n', ['type']);
     $query->orderBy('c.timestamp');
     return $query;
   }
@@ -52,7 +52,7 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'cid' => $this->t('Comment ID.'),
       'pid' => $this->t('Parent comment ID. If set to 0, this comment is not a reply to an existing comment.'),
       'nid' => $this->t('The {node}.nid to which this comment is a reply.'),
@@ -68,7 +68,7 @@ public function fields() {
       'mail' => $this->t("The comment author's email address from the comment form, if user is anonymous, and the 'Anonymous users may/must leave their contact information' setting is turned on."),
       'homepage' => $this->t("The comment author's home page address from the comment form, if user is anonymous, and the 'Anonymous users may/must leave their contact information' setting is turned on."),
       'type' => $this->t("The {node}.type to which this comment is a reply."),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/comment/src/Plugin/migrate/source/d6/CommentVariable.php b/core/modules/comment/src/Plugin/migrate/source/d6/CommentVariable.php
index 3294721381f14b1a0f1bae9a573a538c37eaf93b..a56fb4dc218052c37cb852175c52fd4e416e3b15 100644
--- a/core/modules/comment/src/Plugin/migrate/source/d6/CommentVariable.php
+++ b/core/modules/comment/src/Plugin/migrate/source/d6/CommentVariable.php
@@ -35,7 +35,7 @@ public function count() {
    */
   protected function getCommentVariables() {
     $comment_prefixes = array_keys($this->commentPrefixes());
-    $variables = array();
+    $variables = [];
     $node_types = $this->select('node_type', 'nt')
       ->fields('nt', ['type'])
       ->execute()
@@ -45,7 +45,7 @@ protected function getCommentVariables() {
         $variables[] = $prefix . '_' . $node_type;
       }
     }
-    $return = array();
+    $return = [];
     $values = $this->select('variable', 'v')
       ->fields('v', ['name', 'value'])
       ->condition('name', $variables, 'IN')
@@ -74,17 +74,17 @@ protected function getCommentVariables() {
    * {@inheritdoc}
    */
   public function fields() {
-    return $this->commentPrefixes() + array(
+    return $this->commentPrefixes() + [
       'node_type' => $this->t('The node type'),
       'comment_type' => $this->t('The comment type'),
-    );
+    ];
   }
 
   /**
    * Comment related data for fields.
    */
   protected function commentPrefixes() {
-    return array(
+    return [
       'comment' => $this->t('Default comment setting'),
       'comment_default_mode' => $this->t('Default display mode'),
       'comment_default_order' => $this->t('Default display order'),
@@ -94,7 +94,7 @@ protected function commentPrefixes() {
       'comment_subject_field' => $this->t('Comment subject field'),
       'comment_preview' => $this->t('Preview comment'),
       'comment_form_location' => $this->t('Location of comment submission form'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/comment/src/Plugin/migrate/source/d6/CommentVariablePerCommentType.php b/core/modules/comment/src/Plugin/migrate/source/d6/CommentVariablePerCommentType.php
index 5d16ed0297f069b33ffce78ad9bbd37b3b4e1b87..0eea68608cf3c4b82dbc317ffe875fc074ca9bb7 100644
--- a/core/modules/comment/src/Plugin/migrate/source/d6/CommentVariablePerCommentType.php
+++ b/core/modules/comment/src/Plugin/migrate/source/d6/CommentVariablePerCommentType.php
@@ -17,24 +17,24 @@ class CommentVariablePerCommentType extends CommentVariable {
   protected function getCommentVariables() {
     $node_types = parent::getCommentVariables();
     // The return key used to separate comment types with hidden subject field.
-    $return = array();
+    $return = [];
     foreach ($node_types as $node_type => $data) {
       // Only 2 comment types depending on subject field visibility.
       if (!empty($data['comment_subject_field'])) {
         // Default label and description should be set in migration.
-        $return['comment'] = array(
+        $return['comment'] = [
           'comment_type' => 'comment',
           'label' => $this->t('Default comments'),
           'description' => $this->t('Allows commenting on content')
-        );
+        ];
       }
       else {
         // Provide a special comment type with hidden subject field.
-        $return['comment_no_subject'] = array(
+        $return['comment_no_subject'] = [
           'comment_type' => 'comment_no_subject',
           'label' => $this->t('Comments without subject field'),
           'description' => $this->t('Allows commenting on content, comments without subject field')
-        );
+        ];
       }
     }
     return $return;
@@ -44,11 +44,11 @@ protected function getCommentVariables() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'comment_type' => $this->t('The comment type'),
       'label' => $this->t('The comment type label'),
       'description' => $this->t('The comment type description'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/comment/src/Plugin/migrate/source/d7/Comment.php b/core/modules/comment/src/Plugin/migrate/source/d7/Comment.php
index 5531f1d395843e3b94a20f44c6265519253f1d3a..e643eb178c342ab688bda466727a4942990d53ac 100644
--- a/core/modules/comment/src/Plugin/migrate/source/d7/Comment.php
+++ b/core/modules/comment/src/Plugin/migrate/source/d7/Comment.php
@@ -47,7 +47,7 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'cid' => $this->t('Comment ID.'),
       'pid' => $this->t('Parent comment ID. If set to 0, this comment is not a reply to an existing comment.'),
       'nid' => $this->t('The {node}.nid to which this comment is a reply.'),
@@ -64,7 +64,7 @@ public function fields() {
       'mail' => $this->t("The comment author's email address from the comment form, if user is anonymous, and the 'Anonymous users may/must leave their contact information' setting is turned on."),
       'homepage' => $this->t("The comment author's home page address from the comment form, if user is anonymous, and the 'Anonymous users may/must leave their contact information' setting is turned on."),
       'type' => $this->t("The {node}.type to which this comment is a reply."),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/comment/src/Plugin/migrate/source/d7/CommentType.php b/core/modules/comment/src/Plugin/migrate/source/d7/CommentType.php
index fc194b2a6df2255ac2040300604a6ca75fbed3b2..2ac7c97a05d6ff1cbf01b54d40606b31d20661e7 100644
--- a/core/modules/comment/src/Plugin/migrate/source/d7/CommentType.php
+++ b/core/modules/comment/src/Plugin/migrate/source/d7/CommentType.php
@@ -21,7 +21,7 @@ class CommentType extends DrupalSqlBase {
    *
    * @var string[]
    */
-  protected $nodeTypes = array();
+  protected $nodeTypes = [];
 
   /**
    * {@inheritdoc}
@@ -29,7 +29,7 @@ class CommentType extends DrupalSqlBase {
   public function query() {
     return $this->select('field_config_instance', 'fci')
       ->distinct()
-      ->fields('fci', array('bundle'))
+      ->fields('fci', ['bundle'])
       ->condition('fci.entity_type', 'comment');
   }
 
@@ -38,7 +38,7 @@ public function query() {
    */
   protected function initializeIterator() {
     $this->nodeTypes = $this->select('node_type', 'nt')
-      ->fields('nt', array('type', 'name'))
+      ->fields('nt', ['type', 'name'])
       ->execute()
       ->fetchAllKeyed();
 
@@ -71,7 +71,7 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'label' => $this->t('The label of the comment type.'),
       'bundle' => $this->t('Bundle ID of the comment type.'),
       'node_type' => $this->t('The node type to which this comment type is attached.'),
@@ -81,18 +81,18 @@ public function fields() {
       'form_location' => $this->t('Location of the comment form.'),
       'preview' => $this->t('Whether previews are enabled for the comment type.'),
       'subject' => $this->t('Whether a subject field is enabled for the comment type.'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'bundle' => array(
+    return [
+      'bundle' => [
         'type' => 'string',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/comment/src/Plugin/views/argument/UserUid.php b/core/modules/comment/src/Plugin/views/argument/UserUid.php
index 4ad41854bbd7bfb4ce74cd63ba01bb26b3ceae4e..1fc59929df0d273a93992a080585692b57eb6929 100644
--- a/core/modules/comment/src/Plugin/views/argument/UserUid.php
+++ b/core/modules/comment/src/Plugin/views/argument/UserUid.php
@@ -54,7 +54,7 @@ function title() {
       $title = \Drupal::config('user.settings')->get('anonymous');
     }
     else {
-      $title = $this->database->query('SELECT name FROM {users_field_data} WHERE uid = :uid AND default_langcode = 1', array(':uid' => $this->argument))->fetchField();
+      $title = $this->database->query('SELECT name FROM {users_field_data} WHERE uid = :uid AND default_langcode = 1', [':uid' => $this->argument])->fetchField();
     }
     if (empty($title)) {
       return $this->t('No user');
@@ -103,7 +103,7 @@ public function query($group_by = FALSE) {
    * {@inheritdoc}
    */
   public function getSortName() {
-    return $this->t('Numerical', array(), array('context' => 'Sort order'));
+    return $this->t('Numerical', [], ['context' => 'Sort order']);
   }
 
 }
diff --git a/core/modules/comment/src/Plugin/views/field/EntityLink.php b/core/modules/comment/src/Plugin/views/field/EntityLink.php
index dc4f8cf1811cfb6af318835d023a811effbfc3ca..03e6f6c84348d48e663a260ca1b5bfceaab9b8e0 100644
--- a/core/modules/comment/src/Plugin/views/field/EntityLink.php
+++ b/core/modules/comment/src/Plugin/views/field/EntityLink.php
@@ -27,7 +27,7 @@ class EntityLink extends FieldPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['teaser'] = array('default' => FALSE);
+    $options['teaser'] = ['default' => FALSE];
     return $options;
   }
 
@@ -35,12 +35,12 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['teaser'] = array(
+    $form['teaser'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Show teaser-style link'),
       '#default_value' => $this->options['teaser'],
       '#description' => $this->t('Show the comment link in the form used on standard entity teasers, rather than the full entity form.'),
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
@@ -55,7 +55,7 @@ public function query() {}
    */
   public function preRender(&$values) {
     // Render all nodes, so you can grep the comment links.
-    $entities = array();
+    $entities = [];
     foreach ($values as $row) {
       $entity = $row->_entity;
       $entities[$entity->id()] = $entity;
diff --git a/core/modules/comment/src/Plugin/views/field/NodeNewComments.php b/core/modules/comment/src/Plugin/views/field/NodeNewComments.php
index 5a9f5b3a12f68a9f23d3d3e1f25ab871a37b05f0..c53b52ed154a16aa39b189d542e25fbf6253cf6d 100644
--- a/core/modules/comment/src/Plugin/views/field/NodeNewComments.php
+++ b/core/modules/comment/src/Plugin/views/field/NodeNewComments.php
@@ -68,7 +68,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
     $this->additional_fields['entity_id'] = 'nid';
     $this->additional_fields['type'] = 'type';
-    $this->additional_fields['comment_count'] = array('table' => 'comment_entity_statistics', 'field' => 'comment_count');
+    $this->additional_fields['comment_count'] = ['table' => 'comment_entity_statistics', 'field' => 'comment_count'];
   }
 
   /**
@@ -77,7 +77,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['link_to_comment'] = array('default' => TRUE);
+    $options['link_to_comment'] = ['default' => TRUE];
 
     return $options;
   }
@@ -86,12 +86,12 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['link_to_comment'] = array(
+    $form['link_to_comment'] = [
       '#title' => $this->t('Link this field to new comments'),
       '#description' => $this->t("Enable to override this field's links."),
       '#type' => 'checkbox',
       '#default_value' => $this->options['link_to_comment'],
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
@@ -114,14 +114,14 @@ public function preRender(&$values) {
       return;
     }
 
-    $nids = array();
-    $ids = array();
+    $nids = [];
+    $ids = [];
     foreach ($values as $id => $result) {
       $nids[] = $result->{$this->aliases['nid']};
       $values[$id]->{$this->field_alias} = 0;
       // Create a reference so we can find this record in the values again.
       if (empty($ids[$result->{$this->aliases['nid']}])) {
-        $ids[$result->{$this->aliases['nid']}] = array();
+        $ids[$result->{$this->aliases['nid']}] = [];
       }
       $ids[$result->{$this->aliases['nid']}][] = $id;
     }
@@ -129,13 +129,13 @@ public function preRender(&$values) {
     if ($nids) {
       $result = $this->database->query("SELECT n.nid, COUNT(c.cid) as num_comments FROM {node} n INNER JOIN {comment_field_data} c ON n.nid = c.entity_id AND c.entity_type = 'node' AND c.default_langcode = 1
         LEFT JOIN {history} h ON h.nid = n.nid AND h.uid = :h_uid WHERE n.nid IN ( :nids[] )
-        AND c.changed > GREATEST(COALESCE(h.timestamp, :timestamp1), :timestamp2) AND c.status = :status GROUP BY n.nid", array(
+        AND c.changed > GREATEST(COALESCE(h.timestamp, :timestamp1), :timestamp2) AND c.status = :status GROUP BY n.nid", [
         ':status' => CommentInterface::PUBLISHED,
         ':h_uid' => $user->id(),
         ':nids[]' => $nids,
         ':timestamp1' => HISTORY_READ_LIMIT,
         ':timestamp2' => HISTORY_READ_LIMIT,
-      ));
+      ]);
       foreach ($result as $node) {
         foreach ($ids[$node->nid] as $id) {
           $values[$id]->{$this->field_alias} = $node->num_comments;
@@ -181,7 +181,7 @@ protected function renderLink($data, ResultRow $values) {
         ->getNewCommentPageNumber($this->getValue($values, 'comment_count'), $this->getValue($values), $node, $comment_field_name);
       $this->options['alter']['make_link'] = TRUE;
       $this->options['alter']['url'] = $node->urlInfo();
-      $this->options['alter']['query'] = $page_number ? array('page' => $page_number) : NULL;
+      $this->options['alter']['query'] = $page_number ? ['page' => $page_number] : NULL;
       $this->options['alter']['fragment'] = 'new';
     }
 
diff --git a/core/modules/comment/src/Plugin/views/field/StatisticsLastCommentName.php b/core/modules/comment/src/Plugin/views/field/StatisticsLastCommentName.php
index 61a5d17ef4af72f2a98fbf91721a0d8de78b37da..fa24c3ffe823af6574c11e677aed202e5ba0114f 100644
--- a/core/modules/comment/src/Plugin/views/field/StatisticsLastCommentName.php
+++ b/core/modules/comment/src/Plugin/views/field/StatisticsLastCommentName.php
@@ -23,19 +23,19 @@ public function query() {
     // have to join in a specially related user table.
     $this->ensureMyTable();
     // join 'users' to this table via vid
-    $definition = array(
+    $definition = [
       'table' => 'users_field_data',
       'field' => 'uid',
       'left_table' => 'comment_entity_statistics',
       'left_field' => 'last_comment_uid',
-      'extra' => array(
-        array(
+      'extra' => [
+        [
           'field' => 'uid',
           'operator' => '!=',
           'value' => '0'
-        )
-      )
-    );
+        ]
+      ]
+    ];
     $join = \Drupal::service('plugin.manager.views.join')->createInstance('standard', $definition);
 
     // nes_user alias so this can work with the sort handler, below.
@@ -53,7 +53,7 @@ public function query() {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['link_to_user'] = array('default' => TRUE);
+    $options['link_to_user'] = ['default' => TRUE];
 
     return $options;
   }
@@ -66,10 +66,10 @@ public function render(ResultRow $values) {
       $account = User::create();
       $account->name = $this->getValue($values);
       $account->uid = $values->{$this->uid};
-      $username = array(
+      $username = [
         '#theme' => 'username',
         '#account' => $account,
-      );
+      ];
       return drupal_render($username);
     }
     else {
diff --git a/core/modules/comment/src/Plugin/views/filter/NodeComment.php b/core/modules/comment/src/Plugin/views/filter/NodeComment.php
index e34584f4b3c560869e61d8caebf47673dc5968f5..238c05e867fa26ed92e59960822bbfd125cdae73 100644
--- a/core/modules/comment/src/Plugin/views/filter/NodeComment.php
+++ b/core/modules/comment/src/Plugin/views/filter/NodeComment.php
@@ -15,11 +15,11 @@
 class NodeComment extends InOperator {
 
   public function getValueOptions() {
-    $this->valueOptions = array(
+    $this->valueOptions = [
       CommentItemInterface::HIDDEN => $this->t('Hidden'),
       CommentItemInterface::CLOSED => $this->t('Closed'),
       CommentItemInterface::OPEN => $this->t('Open'),
-    );
+    ];
     return $this->valueOptions;
   }
 
diff --git a/core/modules/comment/src/Plugin/views/row/Rss.php b/core/modules/comment/src/Plugin/views/row/Rss.php
index d52804000277b198777aaeb23e4221394b4a3d21..cb9c1046d1a4bfbe3401f9c59065fecbbb611baa 100644
--- a/core/modules/comment/src/Plugin/views/row/Rss.php
+++ b/core/modules/comment/src/Plugin/views/row/Rss.php
@@ -40,7 +40,7 @@ class Rss extends RssPluginBase {
   protected $entityTypeId = 'comment';
 
   public function preRender($result) {
-    $cids = array();
+    $cids = [];
 
     foreach ($result as $row) {
       $cids[] = $row->cid;
@@ -79,23 +79,23 @@ public function render($row) {
       return;
     }
 
-    $comment->link = $comment->url('canonical', array('absolute' => TRUE));
-    $comment->rss_namespaces = array();
-    $comment->rss_elements = array(
-      array(
+    $comment->link = $comment->url('canonical', ['absolute' => TRUE]);
+    $comment->rss_namespaces = [];
+    $comment->rss_elements = [
+      [
         'key' => 'pubDate',
         'value' => gmdate('r', $comment->getCreatedTime()),
-      ),
-      array(
+      ],
+      [
         'key' => 'dc:creator',
         'value' => $comment->getAuthorName(),
-      ),
-      array(
+      ],
+      [
         'key' => 'guid',
         'value' => 'comment ' . $comment->id() . ' at ' . $base_url,
-        'attributes' => array('isPermaLink' => 'false'),
-      ),
-    );
+        'attributes' => ['isPermaLink' => 'false'],
+      ],
+    ];
 
     // The comment gets built and modules add to or modify
     // $comment->rss_elements and $comment->rss_namespaces.
@@ -118,12 +118,12 @@ public function render($row) {
     $item->elements = &$comment->rss_elements;
     $item->cid = $comment->id();
 
-    $build = array(
+    $build = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#row' => $item,
-    );
+    ];
     return $build;
   }
 
diff --git a/core/modules/comment/src/Plugin/views/sort/StatisticsLastCommentName.php b/core/modules/comment/src/Plugin/views/sort/StatisticsLastCommentName.php
index 863b3a43ba03fb5302f8c8f980a1c29f4f3636ef..48f556e68ac7a513f1e1347082e60f53f59540a2 100644
--- a/core/modules/comment/src/Plugin/views/sort/StatisticsLastCommentName.php
+++ b/core/modules/comment/src/Plugin/views/sort/StatisticsLastCommentName.php
@@ -16,12 +16,12 @@ class StatisticsLastCommentName extends SortPluginBase {
 
   public function query() {
     $this->ensureMyTable();
-    $definition = array(
+    $definition = [
       'table' => 'users_field_data',
       'field' => 'uid',
       'left_table' => 'comment_entity_statistics',
       'left_field' => 'last_comment_uid',
-    );
+    ];
     $join = \Drupal::service('plugin.manager.views.join')->createInstance('standard', $definition);
 
     // @todo this might be safer if we had an ensure_relationship rather than guessing
diff --git a/core/modules/comment/src/Plugin/views/wizard/Comment.php b/core/modules/comment/src/Plugin/views/wizard/Comment.php
index 1f0d4aa45e62114d6c87cef246aa95d778e61076..61d92c591ab5ba4b4f1c6ecf057328d9d1c7bc9f 100644
--- a/core/modules/comment/src/Plugin/views/wizard/Comment.php
+++ b/core/modules/comment/src/Plugin/views/wizard/Comment.php
@@ -27,16 +27,16 @@ class Comment extends WizardPluginBase {
   /**
    * Set default values for the filters.
    */
-  protected $filters = array(
-    'status' => array(
+  protected $filters = [
+    'status' => [
       'value' => TRUE,
       'table' => 'comment_field_data',
       'field' => 'status',
       'plugin_id' => 'boolean',
       'entity_type' => 'comment',
       'entity_field' => 'status',
-    ),
-    'status_node' => array(
+    ],
+    'status_node' => [
       'value' => TRUE,
       'table' => 'node_field_data',
       'field' => 'status',
@@ -44,14 +44,14 @@ class Comment extends WizardPluginBase {
       'relationship' => 'node',
       'entity_type' => 'node',
       'entity_field' => 'status',
-    ),
-  );
+    ],
+  ];
 
   /**
    * {@inheritdoc}
    */
   protected function rowStyleOptions() {
-    $options = array();
+    $options = [];
     $options['entity:comment'] = $this->t('comments');
     $options['fields'] = $this->t('fields');
     return $options;
diff --git a/core/modules/comment/src/Tests/CommentActionsTest.php b/core/modules/comment/src/Tests/CommentActionsTest.php
index 220be20be7b5fb8cc406c7a26231725f57210b90..8b741e79272a89d93202f2551141e995b71a0d38 100644
--- a/core/modules/comment/src/Tests/CommentActionsTest.php
+++ b/core/modules/comment/src/Tests/CommentActionsTest.php
@@ -17,7 +17,7 @@ class CommentActionsTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $modules = array('dblog', 'action');
+  public static $modules = ['dblog', 'action'];
 
   /**
    * Tests comment publish and unpublish actions.
@@ -30,12 +30,12 @@ function testCommentPublishUnpublishActions() {
 
     // Unpublish a comment.
     $action = Action::load('comment_unpublish_action');
-    $action->execute(array($comment));
+    $action->execute([$comment]);
     $this->assertTrue($comment->isPublished() === FALSE, 'Comment was unpublished');
 
     // Publish a comment.
     $action = Action::load('comment_publish_action');
-    $action->execute(array($comment));
+    $action->execute([$comment]);
     $this->assertTrue($comment->isPublished() === TRUE, 'Comment was published');
   }
 
@@ -46,15 +46,15 @@ function testCommentUnpublishByKeyword() {
     $this->drupalLogin($this->adminUser);
     $keyword_1 = $this->randomMachineName();
     $keyword_2 = $this->randomMachineName();
-    $action = Action::create(array(
+    $action = Action::create([
       'id' => 'comment_unpublish_by_keyword_action',
       'label' => $this->randomMachineName(),
       'type' => 'comment',
-      'configuration' => array(
-        'keywords' => array($keyword_1, $keyword_2),
-      ),
+      'configuration' => [
+        'keywords' => [$keyword_1, $keyword_2],
+      ],
       'plugin' => 'comment_unpublish_by_keyword_action',
-    ));
+    ]);
     $action->save();
 
     $comment = $this->postComment($this->node, $keyword_2, $this->randomMachineName());
@@ -64,7 +64,7 @@ function testCommentUnpublishByKeyword() {
 
     $this->assertTrue($comment->isPublished() === TRUE, 'The comment status was set to published.');
 
-    $action->execute(array($comment));
+    $action->execute([$comment]);
     $this->assertTrue($comment->isPublished() === FALSE, 'The comment status was set to not published.');
   }
 
diff --git a/core/modules/comment/src/Tests/CommentAdminTest.php b/core/modules/comment/src/Tests/CommentAdminTest.php
index 5ae57cb8199c4d914ef5743bffd21ce989f1c065..74e6e459691371ba9ec66086b24256cf08ab84d4 100644
--- a/core/modules/comment/src/Tests/CommentAdminTest.php
+++ b/core/modules/comment/src/Tests/CommentAdminTest.php
@@ -23,11 +23,11 @@ protected function setUp() {
    */
   function testApprovalAdminInterface() {
     // Set anonymous comments to require approval.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => TRUE,
       'post comments' => TRUE,
       'skip comment approval' => FALSE,
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
     $this->setCommentAnonymous('0'); // Ensure that doesn't require contact info.
 
@@ -46,14 +46,14 @@ function testApprovalAdminInterface() {
     // Get unapproved comment id.
     $this->drupalLogin($this->adminUser);
     $anonymous_comment4 = $this->getUnapprovedComment($subject);
-    $anonymous_comment4 = Comment::create(array(
+    $anonymous_comment4 = Comment::create([
       'cid' => $anonymous_comment4,
       'subject' => $subject,
       'comment_body' => $body,
       'entity_id' => $this->node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment'
-    ));
+    ]);
     $this->drupalLogout();
 
     $this->assertFalse($this->commentExists($anonymous_comment4), 'Anonymous comment was not published.');
@@ -73,29 +73,29 @@ function testApprovalAdminInterface() {
     // Publish multiple comments in one operation.
     $this->drupalLogin($this->adminUser);
     $this->drupalGet('admin/content/comment/approval');
-    $this->assertText(t('Unapproved comments (@count)', array('@count' => 2)), 'Two unapproved comments waiting for approval.');
-    $edit = array(
+    $this->assertText(t('Unapproved comments (@count)', ['@count' => 2]), 'Two unapproved comments waiting for approval.');
+    $edit = [
       "comments[{$comments[0]->id()}]" => 1,
       "comments[{$comments[1]->id()}]" => 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Update'));
-    $this->assertText(t('Unapproved comments (@count)', array('@count' => 0)), 'All comments were approved.');
+    $this->assertText(t('Unapproved comments (@count)', ['@count' => 0]), 'All comments were approved.');
 
     // Delete multiple comments in one operation.
-    $edit = array(
+    $edit = [
       'operation' => 'delete',
       "comments[{$comments[0]->id()}]" => 1,
       "comments[{$comments[1]->id()}]" => 1,
       "comments[{$anonymous_comment4->id()}]" => 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Update'));
     $this->assertText(t('Are you sure you want to delete these comments and all their children?'), 'Confirmation required.');
     $this->drupalPostForm(NULL, $edit, t('Delete comments'));
     $this->assertText(t('No comments available.'), 'All comments were deleted.');
     // Test message when no comments selected.
-    $edit = array(
+    $edit = [
       'operation' => 'delete',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Update'));
     $this->assertText(t('Select one or more comments to perform the update on.'));
   }
@@ -105,11 +105,11 @@ function testApprovalAdminInterface() {
    */
   function testApprovalNodeInterface() {
     // Set anonymous comments to require approval.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => TRUE,
       'post comments' => TRUE,
       'skip comment approval' => FALSE,
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
     $this->setCommentAnonymous('0'); // Ensure that doesn't require contact info.
     $this->drupalLogout();
@@ -123,14 +123,14 @@ function testApprovalNodeInterface() {
     // Get unapproved comment id.
     $this->drupalLogin($this->adminUser);
     $anonymous_comment4 = $this->getUnapprovedComment($subject);
-    $anonymous_comment4 = Comment::create(array(
+    $anonymous_comment4 = Comment::create([
       'cid' => $anonymous_comment4,
       'subject' => $subject,
       'comment_body' => $body,
       'entity_id' => $this->node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment'
-    ));
+    ]);
     $this->drupalLogout();
 
     $this->assertFalse($this->commentExists($anonymous_comment4), 'Anonymous comment was not published.');
@@ -139,7 +139,7 @@ function testApprovalNodeInterface() {
     $this->drupalLogin($this->adminUser);
     $this->drupalGet('comment/1/approve');
     $this->assertResponse(403, 'Forged comment approval was denied.');
-    $this->drupalGet('comment/1/approve', array('query' => array('token' => 'forged')));
+    $this->drupalGet('comment/1/approve', ['query' => ['token' => 'forged']]);
     $this->assertResponse(403, 'Forged comment approval was denied.');
     $this->drupalGet('comment/1/edit');
     $this->assertFieldChecked('edit-status-0');
@@ -178,11 +178,11 @@ public function testCommentAdmin() {
    */
   public function testEditComment() {
     // Enable anonymous user comments.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments',
       'post comments',
       'skip comment approval',
-    ));
+    ]);
 
     // Log in as a web user.
     $this->drupalLogin($this->webUser);
@@ -199,7 +199,7 @@ public function testEditComment() {
     // Post comment with contact info (required).
     $author_name = $this->randomMachineName();
     $author_mail = $this->randomMachineName() . '@example.com';
-    $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName(), array('name' => $author_name, 'mail' => $author_mail));
+    $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName(), ['name' => $author_name, 'mail' => $author_mail]);
 
     // Log in as an admin user.
     $this->drupalLogin($this->adminUser);
diff --git a/core/modules/comment/src/Tests/CommentAnonymousTest.php b/core/modules/comment/src/Tests/CommentAnonymousTest.php
index 2a5feb2f1fa72778661b41813389ad55df68ca34..7c94e5af87110f5c80a19502319641d849944739 100644
--- a/core/modules/comment/src/Tests/CommentAnonymousTest.php
+++ b/core/modules/comment/src/Tests/CommentAnonymousTest.php
@@ -15,16 +15,16 @@ protected function setUp() {
     parent::setUp();
 
     // Enable anonymous and authenticated user comments.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments',
       'post comments',
       'skip comment approval',
-    ));
-    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array(
+    ]);
+    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, [
       'access comments',
       'post comments',
       'skip comment approval',
-    ));
+    ]);
   }
 
   /**
@@ -66,10 +66,10 @@ function testAnonymous() {
     $this->assertTrue($this->commentExists($anonymous_comment1), 'Anonymous comment without contact info found.');
 
     // Ensure anonymous users cannot post in the name of registered users.
-    $edit = array(
+    $edit = [
       'name' => $this->adminUser->getUsername(),
       'comment_body[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('comment/reply/node/' . $this->node->id() . '/comment', $edit, t('Save'));
     $this->assertRaw(t('The name you used (%name) belongs to a registered user.', [
       '%name' => $this->adminUser->getUsername(),
@@ -97,12 +97,12 @@ function testAnonymous() {
     $this->assertTrue($this->commentExists($anonymous_comment2), 'Anonymous comment with contact info (optional) found.');
 
     // Ensure anonymous users cannot post in the name of registered users.
-    $edit = array(
+    $edit = [
       'name' => $this->adminUser->getUsername(),
       'mail' => $this->randomMachineName() . '@example.com',
       'subject[0][value]' => $this->randomMachineName(),
       'comment_body[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('comment/reply/node/' . $this->node->id() . '/comment', $edit, t('Save'));
     $this->assertRaw(t('The name you used (%name) belongs to a registered user.', [
       '%name' => $this->adminUser->getUsername(),
@@ -125,7 +125,7 @@ function testAnonymous() {
     // Post comment with contact info (required).
     $author_name = $this->randomMachineName();
     $author_mail = $this->randomMachineName() . '@example.com';
-    $anonymous_comment3 = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName(), array('name' => $author_name, 'mail' => $author_mail));
+    $anonymous_comment3 = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName(), ['name' => $author_name, 'mail' => $author_mail]);
     $this->assertTrue($this->commentExists($anonymous_comment3), 'Anonymous comment with contact info (required) found.');
 
     // Make sure the user data appears correctly when editing the comment.
@@ -159,11 +159,11 @@ function testAnonymous() {
     $this->assertResponse(403);
 
     // Reset.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => FALSE,
       'post comments' => FALSE,
       'skip comment approval' => FALSE,
-    ));
+    ]);
 
     // Attempt to view comments while disallowed.
     // NOTE: if authenticated user has permission to post comments, then a
@@ -176,21 +176,21 @@ function testAnonymous() {
     $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
     $this->assertResponse(403);
 
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => TRUE,
       'post comments' => FALSE,
       'skip comment approval' => FALSE,
-    ));
+    ]);
     $this->drupalGet('node/' . $this->node->id());
     $this->assertPattern('@<h2[^>]*>Comments</h2>@', 'Comments were displayed.');
     $this->assertLink('Log in', 1, 'Link to login was found.');
     $this->assertLink('register', 1, 'Link to register was found.');
 
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => FALSE,
       'post comments' => TRUE,
       'skip comment approval' => TRUE,
-    ));
+    ]);
     $this->drupalGet('node/' . $this->node->id());
     $this->assertNoPattern('@<h2[^>]*>Comments</h2>@', 'Comments were not displayed.');
     $this->assertFieldByName('subject[0][value]', '', 'Subject field found.');
diff --git a/core/modules/comment/src/Tests/CommentBlockTest.php b/core/modules/comment/src/Tests/CommentBlockTest.php
index de92238ddfa8af7583902420e5b2ee7d12f01c5b..fca7223a41c45a29ecff06fb7ca50e192611f36d 100644
--- a/core/modules/comment/src/Tests/CommentBlockTest.php
+++ b/core/modules/comment/src/Tests/CommentBlockTest.php
@@ -17,12 +17,12 @@ class CommentBlockTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'views');
+  public static $modules = ['block', 'views'];
 
   protected function setUp() {
     parent::setUp();
     // Update admin user to have the 'administer blocks' permission.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer content types',
       'administer comments',
       'skip comment approval',
@@ -30,7 +30,7 @@ protected function setUp() {
       'access comments',
       'access content',
       'administer blocks',
-     ));
+     ]);
   }
 
   /**
@@ -54,10 +54,10 @@ function testRecentCommentBlock() {
     // Test that a user without the 'access comments' permission cannot see the
     // block.
     $this->drupalLogout();
-    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, array('access comments'));
+    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, ['access comments']);
     $this->drupalGet('');
     $this->assertNoText(t('Recent comments'));
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access comments'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access comments']);
 
     // Test that a user with the 'access comments' permission can see the
     // block.
@@ -68,11 +68,11 @@ function testRecentCommentBlock() {
     // Test the only the 10 latest comments are shown and in the proper order.
     $this->assertNoText($comments[10]->getSubject(), 'Comment 11 not found in block.');
     for ($i = 0; $i < 10; $i++) {
-      $this->assertText($comments[$i]->getSubject(), SafeMarkup::format('Comment @number found in block.', array('@number' => 10 - $i)));
+      $this->assertText($comments[$i]->getSubject(), SafeMarkup::format('Comment @number found in block.', ['@number' => 10 - $i]));
       if ($i > 1) {
         $previous_position = $position;
         $position = strpos($this->getRawContent(), $comments[$i]->getSubject());
-        $this->assertTrue($position > $previous_position, SafeMarkup::format('Comment @a appears after comment @b', array('@a' => 10 - $i, '@b' => 11 - $i)));
+        $this->assertTrue($position > $previous_position, SafeMarkup::format('Comment @a appears after comment @b', ['@a' => 10 - $i, '@b' => 11 - $i]));
       }
       $position = strpos($this->getRawContent(), $comments[$i]->getSubject());
     }
diff --git a/core/modules/comment/src/Tests/CommentBookTest.php b/core/modules/comment/src/Tests/CommentBookTest.php
index b23028b42ea9c675378ca711970c3e931a7577fe..4afd07ed83c1a84d0dd2b150e1d6e9ac0c15fd77 100644
--- a/core/modules/comment/src/Tests/CommentBookTest.php
+++ b/core/modules/comment/src/Tests/CommentBookTest.php
@@ -21,7 +21,7 @@ class CommentBookTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('book', 'comment');
+  public static $modules = ['book', 'comment'];
 
   protected function setUp() {
     parent::setUp();
@@ -44,17 +44,17 @@ public function testBookCommentPrint() {
 
     $comment_subject = $this->randomMachineName(8);
     $comment_body = $this->randomMachineName(8);
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'subject' => $comment_subject,
       'comment_body' => $comment_body,
       'entity_id' => $book_node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment',
       'status' => CommentInterface::PUBLISHED,
-    ));
+    ]);
     $comment->save();
 
-    $commenting_user = $this->drupalCreateUser(array('access printer-friendly version', 'access comments', 'post comments'));
+    $commenting_user = $this->drupalCreateUser(['access printer-friendly version', 'access comments', 'post comments']);
     $this->drupalLogin($commenting_user);
 
     $this->drupalGet('node/' . $book_node->id());
diff --git a/core/modules/comment/src/Tests/CommentCSSTest.php b/core/modules/comment/src/Tests/CommentCSSTest.php
index f015f3fb39908f4c65be2a7509c52f607334926f..3c48f698cda62140f2ed5d7975b87cf365e8dfa9 100644
--- a/core/modules/comment/src/Tests/CommentCSSTest.php
+++ b/core/modules/comment/src/Tests/CommentCSSTest.php
@@ -18,10 +18,10 @@ protected function setUp() {
     parent::setUp();
 
     // Allow anonymous users to see comments.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments',
       'access content'
-    ));
+    ]);
   }
 
   /**
@@ -29,21 +29,21 @@ protected function setUp() {
    */
   function testCommentClasses() {
     // Create all permutations for comments, users, and nodes.
-    $parameters = array(
-      'node_uid' => array(0, $this->webUser->id()),
-      'comment_uid' => array(0, $this->webUser->id(), $this->adminUser->id()),
-      'comment_status' => array(CommentInterface::PUBLISHED, CommentInterface::NOT_PUBLISHED),
-      'user' => array('anonymous', 'authenticated', 'admin'),
-    );
+    $parameters = [
+      'node_uid' => [0, $this->webUser->id()],
+      'comment_uid' => [0, $this->webUser->id(), $this->adminUser->id()],
+      'comment_status' => [CommentInterface::PUBLISHED, CommentInterface::NOT_PUBLISHED],
+      'user' => ['anonymous', 'authenticated', 'admin'],
+    ];
     $permutations = $this->generatePermutations($parameters);
 
     foreach ($permutations as $case) {
       // Create a new node.
-      $node = $this->drupalCreateNode(array('type' => 'article', 'uid' => $case['node_uid']));
+      $node = $this->drupalCreateNode(['type' => 'article', 'uid' => $case['node_uid']]);
 
       // Add a comment.
       /** @var \Drupal\comment\CommentInterface $comment */
-      $comment = Comment::create(array(
+      $comment = Comment::create([
         'entity_id' => $node->id(),
         'entity_type' => 'node',
         'field_name' => 'comment',
@@ -51,8 +51,8 @@ function testCommentClasses() {
         'status' => $case['comment_status'],
         'subject' => $this->randomMachineName(),
         'language' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-        'comment_body' => array(LanguageInterface::LANGCODE_NOT_SPECIFIED => array($this->randomMachineName())),
-      ));
+        'comment_body' => [LanguageInterface::LANGCODE_NOT_SPECIFIED => [$this->randomMachineName()]],
+      ]);
       $comment->save();
 
       // Adjust the current/viewing user.
diff --git a/core/modules/comment/src/Tests/CommentCacheTagsTest.php b/core/modules/comment/src/Tests/CommentCacheTagsTest.php
index 3c7ab009638b192430ac68d94b03f3d22c1733fd..12e0ef8451bc2014f03d797f6e34704821ada0a0 100644
--- a/core/modules/comment/src/Tests/CommentCacheTagsTest.php
+++ b/core/modules/comment/src/Tests/CommentCacheTagsTest.php
@@ -24,7 +24,7 @@ class CommentCacheTagsTest extends EntityWithUriCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('comment');
+  public static $modules = ['comment'];
 
   /**
    * @var \Drupal\entity_test\Entity\EntityTest
@@ -66,24 +66,24 @@ protected function createEntity() {
     $field->save();
 
     // Create a "Camelids" test entity that the comment will be assigned to.
-    $this->entityTestCamelid = EntityTest::create(array(
+    $this->entityTestCamelid = EntityTest::create([
       'name' => 'Camelids',
       'type' => 'bar',
-    ));
+    ]);
     $this->entityTestCamelid->save();
 
     // Create a "Llama" comment.
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'subject' => 'Llama',
-      'comment_body' => array(
+      'comment_body' => [
         'value' => 'The name "llama" was adopted by European settlers from native Peruvians.',
         'format' => 'plain_text',
-      ),
+      ],
       'entity_id' => $this->entityTestCamelid->id(),
       'entity_type' => 'entity_test',
       'field_name' => 'comment',
       'status' => CommentInterface::PUBLISHED,
-    ));
+    ]);
     $comment->save();
 
     return $comment;
@@ -97,26 +97,26 @@ public function testCommentEntity() {
     $this->verifyPageCache($this->entityTestCamelid->urlInfo(), 'HIT');
 
     // Create a "Hippopotamus" comment.
-    $this->entityTestHippopotamidae = EntityTest::create(array(
+    $this->entityTestHippopotamidae = EntityTest::create([
       'name' => 'Hippopotamus',
       'type' => 'bar',
-    ));
+    ]);
     $this->entityTestHippopotamidae->save();
 
     $this->verifyPageCache($this->entityTestHippopotamidae->urlInfo(), 'MISS');
     $this->verifyPageCache($this->entityTestHippopotamidae->urlInfo(), 'HIT');
 
-    $hippo_comment = Comment::create(array(
+    $hippo_comment = Comment::create([
       'subject' => 'Hippopotamus',
-      'comment_body' => array(
+      'comment_body' => [
         'value' => 'The common hippopotamus (Hippopotamus amphibius), or hippo, is a large, mostly herbivorous mammal in sub-Saharan Africa',
         'format' => 'plain_text',
-      ),
+      ],
       'entity_id' => $this->entityTestHippopotamidae->id(),
       'entity_type' => 'entity_test',
       'field_name' => 'comment',
       'status' => CommentInterface::PUBLISHED,
-    ));
+    ]);
     $hippo_comment->save();
 
     // Ensure that a new comment only invalidates the commented entity.
@@ -145,11 +145,11 @@ protected function getAdditionalCacheContextsForEntity(EntityInterface $entity)
    */
   protected function getAdditionalCacheTagsForEntity(EntityInterface $entity) {
     /** @var \Drupal\comment\CommentInterface $entity */
-    return array(
+    return [
       'config:filter.format.plain_text',
       'user:' . $entity->getOwnerId(),
       'user_view',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/comment/src/Tests/CommentFieldsTest.php b/core/modules/comment/src/Tests/CommentFieldsTest.php
index 4da6e756eee347c060bd1f6e82439cf05606550a..fa8a72a6a8ad3d9bb3eb046ee791667c60c4ae99 100644
--- a/core/modules/comment/src/Tests/CommentFieldsTest.php
+++ b/core/modules/comment/src/Tests/CommentFieldsTest.php
@@ -19,7 +19,7 @@ class CommentFieldsTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_ui');
+  public static $modules = ['field_ui'];
 
   /**
    * Tests that the default 'comment_body' field is correctly added.
@@ -27,7 +27,7 @@ class CommentFieldsTest extends CommentTestBase {
   function testCommentDefaultFields() {
     // Do not make assumptions on default node types created by the test
     // installation profile, and create our own.
-    $this->drupalCreateContentType(array('type' => 'test_node_type'));
+    $this->drupalCreateContentType(['type' => 'test_node_type']);
     $this->addDefaultCommentField('node', 'test_node_type');
 
     // Check that the 'comment_body' field is present on the comment bundle.
@@ -43,7 +43,7 @@ function testCommentDefaultFields() {
 
     // Create a new content type.
     $type_name = 'test_node_type_2';
-    $this->drupalCreateContentType(array('type' => $type_name));
+    $this->drupalCreateContentType(['type' => $type_name]);
     $this->addDefaultCommentField('node', $type_name);
 
     // Check that the 'comment_body' field exists and has an instance on the
@@ -51,7 +51,7 @@ function testCommentDefaultFields() {
     $field_storage = FieldStorageConfig::loadByName('comment', 'comment_body');
     $this->assertTrue($field_storage, 'The comment_body field exists');
     $field = FieldConfig::loadByName('comment', 'comment', 'comment_body');
-    $this->assertTrue(isset($field), format_string('The comment_body field is present for comments on type @type', array('@type' => $type_name)));
+    $this->assertTrue(isset($field), format_string('The comment_body field is present for comments on type @type', ['@type' => $type_name]));
 
     // Test adding a field that defaults to CommentItemInterface::CLOSED.
     $this->addDefaultCommentField('node', 'test_node_type', 'who_likes_ponies', CommentItemInterface::CLOSED, 'who_likes_ponies');
@@ -63,7 +63,7 @@ function testCommentDefaultFields() {
    * Tests that you can remove a comment field.
    */
   public function testCommentFieldDelete() {
-    $this->drupalCreateContentType(array('type' => 'test_node_type'));
+    $this->drupalCreateContentType(['type' => 'test_node_type']);
     $this->addDefaultCommentField('node', 'test_node_type');
     // We want to test the handling of removing the primary comment field, so we
     // ensure there is at least one other comment field attached to a node type
@@ -71,10 +71,10 @@ public function testCommentFieldDelete() {
     $this->addDefaultCommentField('node', 'test_node_type', 'comment2');
 
     // Create a sample node.
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'title' => 'Baloney',
       'type' => 'test_node_type',
-    ));
+    ]);
 
     $this->drupalLogin($this->webUser);
 
@@ -143,38 +143,38 @@ public function testCommentFieldLinksNonDefaultName() {
    */
   public function testCommentFieldCreate() {
     // Create user who can administer user fields.
-    $user = $this->drupalCreateUser(array(
+    $user = $this->drupalCreateUser([
       'administer user fields',
-    ));
+    ]);
     $this->drupalLogin($user);
 
     // Create comment field in account settings.
-    $edit = array(
+    $edit = [
       'new_storage_type' => 'comment',
       'label' => 'User comment',
       'field_name' => 'user_comment',
-    );
+    ];
     $this->drupalPostForm('admin/config/people/accounts/fields/add-field', $edit, 'Save and continue');
 
     // Try to save the comment field without selecting a comment type.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('admin/config/people/accounts/fields/user.user.field_user_comment/storage', $edit, t('Save field settings'));
     // We should get an error message.
     $this->assertText(t('An illegal choice has been detected. Please contact the site administrator.'));
 
     // Create a comment type for users.
-    $bundle = CommentType::create(array(
+    $bundle = CommentType::create([
       'id' => 'user_comment_type',
       'label' => 'user_comment_type',
       'description' => '',
       'target_entity_type_id' => 'user',
-    ));
+    ]);
     $bundle->save();
 
     // Select a comment type and try to save again.
-    $edit = array(
+    $edit = [
       'settings[comment_type]' => 'user_comment_type',
-    );
+    ];
     $this->drupalPostForm('admin/config/people/accounts/fields/user.user.field_user_comment/storage', $edit, t('Save field settings'));
     // We shouldn't get an error message.
     $this->assertNoText(t('An illegal choice has been detected. Please contact the site administrator.'));
@@ -185,7 +185,7 @@ public function testCommentFieldCreate() {
    */
   function testCommentInstallAfterContentModule() {
     // Create a user to do module administration.
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'administer modules'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer modules']);
     $this->drupalLogin($this->adminUser);
 
     // Drop default comment field added in CommentTestBase::setup().
@@ -199,20 +199,20 @@ function testCommentInstallAfterContentModule() {
     field_purge_batch(10);
 
     // Uninstall the comment module.
-    $edit = array();
+    $edit = [];
     $edit['uninstall[comment]'] = TRUE;
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
-    $this->drupalPostForm(NULL, array(), t('Uninstall'));
+    $this->drupalPostForm(NULL, [], t('Uninstall'));
     $this->rebuildContainer();
     $this->assertFalse($this->container->get('module_handler')->moduleExists('comment'), 'Comment module uninstalled.');
 
     // Install core content type module (book).
-    $edit = array();
+    $edit = [];
     $edit['modules[book][enable]'] = 'book';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
 
     // Now install the comment module.
-    $edit = array();
+    $edit = [];
     $edit['modules[comment][enable]'] = 'comment';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
     $this->rebuildContainer();
@@ -220,14 +220,14 @@ function testCommentInstallAfterContentModule() {
 
     // Create nodes of each type.
     $this->addDefaultCommentField('node', 'book');
-    $book_node = $this->drupalCreateNode(array('type' => 'book'));
+    $book_node = $this->drupalCreateNode(['type' => 'book']);
 
     $this->drupalLogout();
 
     // Try to post a comment on each node. A failure will be triggered if the
     // comment body is missing on one of these forms, due to postComment()
     // asserting that the body is actually posted correctly.
-    $this->webUser = $this->drupalCreateUser(array('access content', 'access comments', 'post comments', 'skip comment approval'));
+    $this->webUser = $this->drupalCreateUser(['access content', 'access comments', 'post comments', 'skip comment approval']);
     $this->drupalLogin($this->webUser);
     $this->postComment($book_node, $this->randomMachineName(), $this->randomMachineName());
   }
diff --git a/core/modules/comment/src/Tests/CommentInterfaceTest.php b/core/modules/comment/src/Tests/CommentInterfaceTest.php
index ba43224c7386e3331d89345019ede6a823d06110..6f67ca84dbb4ba2f017d88de4bcfcee54b32ae64 100644
--- a/core/modules/comment/src/Tests/CommentInterfaceTest.php
+++ b/core/modules/comment/src/Tests/CommentInterfaceTest.php
@@ -68,7 +68,7 @@ public function testCommentInterface() {
 
     // Comment as anonymous with preview required.
     $this->drupalLogout();
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access content', 'access comments', 'post comments', 'skip comment approval'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access content', 'access comments', 'post comments', 'skip comment approval']);
     $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $this->assertTrue($this->commentExists($anonymous_comment), 'Comment found.');
     $anonymous_comment->delete();
@@ -92,24 +92,24 @@ public function testCommentInterface() {
     $this->setCommentPreview(DRUPAL_OPTIONAL);
 
     $this->drupalGet('comment/' . $comment->id() . '/edit');
-    $this->assertTitle(t('Edit comment @title | Drupal', array(
+    $this->assertTitle(t('Edit comment @title | Drupal', [
       '@title' => $comment->getSubject(),
-    )));
+    ]));
 
     // Test changing the comment author to "Anonymous".
-    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('uid' => ''));
+    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), ['uid' => '']);
     $this->assertTrue($comment->getAuthorName() == t('Anonymous') && $comment->getOwnerId() == 0, 'Comment author successfully changed to anonymous.');
 
     // Test changing the comment author to an unverified user.
     $random_name = $this->randomMachineName();
     $this->drupalGet('comment/' . $comment->id() . '/edit');
-    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('name' => $random_name));
+    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), ['name' => $random_name]);
     $this->drupalGet('node/' . $this->node->id());
     $this->assertText($random_name . ' (' . t('not verified') . ')', 'Comment author successfully changed to an unverified user.');
 
     // Test changing the comment author to a verified user.
     $this->drupalGet('comment/' . $comment->id() . '/edit');
-    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('uid' => $this->webUser->getUsername() . ' (' . $this->webUser->id() . ')'));
+    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), ['uid' => $this->webUser->getUsername() . ' (' . $this->webUser->id() . ')']);
     $this->assertTrue($comment->getAuthorName() == $this->webUser->getUsername() && $comment->getOwnerId() == $this->webUser->id(), 'Comment author successfully changed to a registered user.');
 
     $this->drupalLogout();
@@ -121,7 +121,7 @@ public function testCommentInterface() {
     // \Drupal\comment\Controller\CommentController::redirectNode().
     $this->drupalGet('comment/' . $this->node->id() . '/reply');
     // Verify we were correctly redirected.
-    $this->assertUrl(\Drupal::url('comment.reply', array('entity_type' => 'node', 'entity' => $this->node->id(), 'field_name' => 'comment'), array('absolute' => TRUE)));
+    $this->assertUrl(\Drupal::url('comment.reply', ['entity_type' => 'node', 'entity' => $this->node->id(), 'field_name' => 'comment'], ['absolute' => TRUE]));
     $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment/' . $comment->id());
     $this->assertText($subject_text, 'Individual comment-reply subject found.');
     $this->assertText($comment_text, 'Individual comment-reply body found.');
@@ -161,7 +161,7 @@ public function testCommentInterface() {
     $this->setCommentsPerPage(2);
     $comment_new_page = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $this->assertTrue($this->commentExists($comment_new_page), 'Page one exists. %s');
-    $this->drupalGet('node/' . $this->node->id(), array('query' => array('page' => 2)));
+    $this->drupalGet('node/' . $this->node->id(), ['query' => ['page' => 2]]);
     $this->assertTrue($this->commentExists($reply, TRUE), 'Page two exists. %s');
     $this->setCommentsPerPage(50);
 
@@ -172,21 +172,21 @@ public function testCommentInterface() {
     $this->assertResponse(403);
 
     // Attempt to post to node with comments disabled.
-    $this->node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'comment' => array(array('status' => CommentItemInterface::HIDDEN))));
+    $this->node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1, 'comment' => [['status' => CommentItemInterface::HIDDEN]]]);
     $this->assertTrue($this->node, 'Article node created.');
     $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
     $this->assertResponse(403);
     $this->assertNoField('edit-comment', 'Comment body field found.');
 
     // Attempt to post to node with read-only comments.
-    $this->node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'comment' => array(array('status' => CommentItemInterface::CLOSED))));
+    $this->node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1, 'comment' => [['status' => CommentItemInterface::CLOSED]]]);
     $this->assertTrue($this->node, 'Article node created.');
     $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
     $this->assertResponse(403);
     $this->assertNoField('edit-comment', 'Comment body field found.');
 
     // Attempt to post to node with comments enabled (check field names etc).
-    $this->node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'comment' => array(array('status' => CommentItemInterface::OPEN))));
+    $this->node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1, 'comment' => [['status' => CommentItemInterface::OPEN]]]);
     $this->assertTrue($this->node, 'Article node created.');
     $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
     $this->assertNoText('This discussion is closed', 'Posting to node with comments enabled');
@@ -254,17 +254,17 @@ public function testAutoFilledHtmlSubject() {
     // can select one of them. Then create a user that can use these formats,
     // log the user in, and then GET the node page on which to test the
     // comments.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
-    ));
+    ]);
     $filtered_html_format->save();
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
-    ));
+    ]);
     $full_html_format->save();
-    $html_user = $this->drupalCreateUser(array(
+    $html_user = $this->drupalCreateUser([
       'access comments',
       'post comments',
       'edit own comments',
@@ -272,25 +272,25 @@ public function testAutoFilledHtmlSubject() {
       'access content',
       $filtered_html_format->getPermissionName(),
       $full_html_format->getPermissionName(),
-    ));
+    ]);
     $this->drupalLogin($html_user);
     $this->drupalGet('node/' . $this->node->id());
 
     // HTML should not be included in the character count.
     $body_text1 = '<span></span><strong> </strong><span> </span><strong></strong>Hello World<br />';
-    $edit1 = array(
+    $edit1 = [
       'comment_body[0][value]' => $body_text1,
       'comment_body[0][format]' => 'filtered_html',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit1, t('Save'));
     $this->assertEqual('Hello World', Comment::load(1)->getSubject());
 
     // If there's nothing other than HTML, the subject should be '(No subject)'.
     $body_text2 = '<span></span><strong> </strong><span> </span><strong></strong> <br />';
-    $edit2 = array(
+    $edit2 = [
       'comment_body[0][value]' => $body_text2,
       'comment_body[0][format]' => 'filtered_html',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit2, t('Save'));
     $this->assertEqual('(No subject)', Comment::load(2)->getSubject());
   }
diff --git a/core/modules/comment/src/Tests/CommentLanguageTest.php b/core/modules/comment/src/Tests/CommentLanguageTest.php
index c60f82783f0909da274a1836227bf32b34f5251a..b047b403410a2857049037b582a8b49f495dd6df 100644
--- a/core/modules/comment/src/Tests/CommentLanguageTest.php
+++ b/core/modules/comment/src/Tests/CommentLanguageTest.php
@@ -25,23 +25,23 @@ class CommentLanguageTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'language', 'language_test', 'comment_test');
+  public static $modules = ['node', 'language', 'language_test', 'comment_test'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
 
     // Create and log in user.
-    $admin_user = $this->drupalCreateUser(array('administer site configuration', 'administer languages', 'access administration pages', 'administer content types', 'administer comments', 'create article content', 'access comments', 'post comments', 'skip comment approval'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration', 'administer languages', 'access administration pages', 'administer content types', 'administer comments', 'create article content', 'access comments', 'post comments', 'skip comment approval']);
     $this->drupalLogin($admin_user);
 
     // Add language.
-    $edit = array('predefined_langcode' => 'fr');
+    $edit = ['predefined_langcode' => 'fr'];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Set "Article" content type to use multilingual support.
-    $edit = array('language_configuration[language_alterable]' => TRUE);
+    $edit = ['language_configuration[language_alterable]' => TRUE];
     $this->drupalPostForm('admin/structure/types/manage/article', $edit, t('Save content type'));
 
     // Enable content language negotiation UI.
@@ -51,16 +51,16 @@ protected function setUp() {
     // to URL. Disable inheritance from interface language to ensure content
     // language will fall back to the default language if no URL language can be
     // detected.
-    $edit = array(
+    $edit = [
       'language_interface[enabled][language-user]' => TRUE,
       'language_content[enabled][language-url]' => TRUE,
       'language_content[enabled][language-interface]' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Change user language preference, this way interface language is always
     // French no matter what path prefix the URLs have.
-    $edit = array('preferred_langcode' => 'fr');
+    $edit = ['preferred_langcode' => 'fr'];
     $this->drupalPostForm("user/" . $admin_user->id() . "/edit", $edit, t('Save'));
 
     // Create comment field on article.
@@ -87,12 +87,12 @@ function testCommentLanguage() {
     foreach ($this->container->get('language_manager')->getLanguages() as $node_langcode => $node_language) {
       // Create "Article" content.
       $title = $this->randomMachineName();
-      $edit = array(
+      $edit = [
         'title[0][value]' => $title,
         'body[0][value]' => $this->randomMachineName(),
         'langcode[0][value]' => $node_langcode,
         'comment[0][status]' => CommentItemInterface::OPEN,
-      );
+      ];
       $this->drupalPostForm("node/add/article", $edit, t('Save'));
       $node = $this->drupalGetNodeByTitle($title);
 
@@ -101,10 +101,10 @@ function testCommentLanguage() {
         // Post a comment with content language $langcode.
         $prefix = empty($prefixes[$langcode]) ? '' : $prefixes[$langcode] . '/';
         $comment_values[$node_langcode][$langcode] = $this->randomMachineName();
-        $edit = array(
+        $edit = [
           'subject[0][value]' => $this->randomMachineName(),
           'comment_body[0][value]' => $comment_values[$node_langcode][$langcode],
-        );
+        ];
         $this->drupalPostForm($prefix . 'node/' . $node->id(), $edit, t('Preview'));
         $this->drupalPostForm(NULL, $edit, t('Save'));
 
@@ -117,7 +117,7 @@ function testCommentLanguage() {
           ->range(0, 1)
           ->execute();
         $comment = Comment::load(reset($cids));
-        $args = array('%node_language' => $node_langcode, '%comment_language' => $comment->langcode->value, '%langcode' => $langcode);
+        $args = ['%node_language' => $node_langcode, '%comment_language' => $comment->langcode->value, '%langcode' => $langcode];
         $this->assertEqual($comment->langcode->value, $langcode, format_string('The comment posted with content language %langcode and belonging to the node with language %node_language has language %comment_language', $args));
         $this->assertEqual($comment->comment_body->value, $comment_values[$node_langcode][$langcode], 'Comment body correctly stored.');
       }
diff --git a/core/modules/comment/src/Tests/CommentLinksAlterTest.php b/core/modules/comment/src/Tests/CommentLinksAlterTest.php
index 22ff587c3d28bd9de1e9a67d5a59f0c7da87c21c..88e092f08d396977df34a71b605747470dae35ce 100644
--- a/core/modules/comment/src/Tests/CommentLinksAlterTest.php
+++ b/core/modules/comment/src/Tests/CommentLinksAlterTest.php
@@ -9,7 +9,7 @@
  */
 class CommentLinksAlterTest extends CommentTestBase {
 
-  public static $modules = array('comment_test');
+  public static $modules = ['comment_test'];
 
   protected function setUp() {
     parent::setUp();
diff --git a/core/modules/comment/src/Tests/CommentLinksTest.php b/core/modules/comment/src/Tests/CommentLinksTest.php
index 1115f57936cad3ed147511f9fd868b237eedf731..589a35566357986ba94faccd121032e3d84bfd4a 100644
--- a/core/modules/comment/src/Tests/CommentLinksTest.php
+++ b/core/modules/comment/src/Tests/CommentLinksTest.php
@@ -27,7 +27,7 @@ class CommentLinksTest extends CommentTestBase {
    *
    * @var array
    */
-  protected $seen = array();
+  protected $seen = [];
 
   /**
    * Use the main node listing to test rendering on teasers.
@@ -36,14 +36,14 @@ class CommentLinksTest extends CommentTestBase {
    *
    * @todo Remove this dependency.
    */
-  public static $modules = array('views');
+  public static $modules = ['views'];
 
   /**
    * Tests that comment links are output and can be hidden.
    */
   public function testCommentLinks() {
     // Bartik theme alters comment links, so use a different theme.
-    \Drupal::service('theme_handler')->install(array('stark'));
+    \Drupal::service('theme_handler')->install(['stark']);
     $this->config('system.theme')
       ->set('default', 'stark')
       ->save();
@@ -51,11 +51,11 @@ public function testCommentLinks() {
     // Remove additional user permissions from $this->webUser added by setUp(),
     // since this test is limited to anonymous and authenticated roles only.
     $roles = $this->webUser->getRoles();
-    entity_delete_multiple('user_role', array(reset($roles)));
+    entity_delete_multiple('user_role', [reset($roles)]);
 
     // Create a comment via CRUD API functionality, since
     // $this->postComment() relies on actual user permissions.
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'cid' => NULL,
       'entity_id' => $this->node->id(),
       'entity_type' => 'node',
@@ -66,8 +66,8 @@ public function testCommentLinks() {
       'subject' => $this->randomMachineName(),
       'hostname' => '127.0.0.1',
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-      'comment_body' => array(array('value' => $this->randomMachineName())),
-    ));
+      'comment_body' => [['value' => $this->randomMachineName()]],
+    ]);
     $comment->save();
     $this->comment = $comment;
 
@@ -78,19 +78,19 @@ public function testCommentLinks() {
     $this->node->save();
 
     // Change user permissions.
-    $perms = array(
+    $perms = [
       'access comments' => 1,
       'post comments' => 1,
       'skip comment approval' => 1,
       'edit own comments' => 1,
-    );
+    ];
     user_role_change_permissions(RoleInterface::ANONYMOUS_ID, $perms);
 
     $nid = $this->node->id();
 
     // Assert basic link is output, actual functionality is unit-tested in
     // \Drupal\comment\Tests\CommentLinkBuilderTest.
-    foreach (array('node', "node/$nid") as $path) {
+    foreach (['node', "node/$nid"] as $path) {
       $this->drupalGet($path);
 
       // In teaser view, a link containing the comment count is always
@@ -103,7 +103,7 @@ public function testCommentLinks() {
 
     // Change weight to make links go before comment body.
     entity_get_display('comment', 'comment', 'default')
-      ->setComponent('links', array('weight' => -100))
+      ->setComponent('links', ['weight' => -100])
       ->save();
     $this->drupalGet($this->node->urlInfo());
     $element = $this->cssSelect('article.js-comment > div');
@@ -113,7 +113,7 @@ public function testCommentLinks() {
 
     // Change weight to make links go after comment body.
     entity_get_display('comment', 'comment', 'default')
-      ->setComponent('links', array('weight' => 100))
+      ->setComponent('links', ['weight' => 100])
       ->save();
     $this->drupalGet($this->node->urlInfo());
     $element = $this->cssSelect('article.js-comment > div');
diff --git a/core/modules/comment/src/Tests/CommentNewIndicatorTest.php b/core/modules/comment/src/Tests/CommentNewIndicatorTest.php
index 6d89d4a64677ea83bffaab487bc6ef860bee1a5d..55609e3778e51db6b10f7452bee5929cb944a368 100644
--- a/core/modules/comment/src/Tests/CommentNewIndicatorTest.php
+++ b/core/modules/comment/src/Tests/CommentNewIndicatorTest.php
@@ -22,7 +22,7 @@ class CommentNewIndicatorTest extends CommentTestBase {
    *
    * @todo Remove this dependency.
    */
-  public static $modules = array('views');
+  public static $modules = ['views'];
 
   /**
    * Get node "x new comments" metadata from the server for the current user.
@@ -35,7 +35,7 @@ class CommentNewIndicatorTest extends CommentTestBase {
    */
   protected function renderNewCommentsNodeLinks(array $node_ids) {
     // Build POST values.
-    $post = array();
+    $post = [];
     for ($i = 0; $i < count($node_ids); $i++) {
       $post['node_ids[' . $i . ']'] = $node_ids[$i];
     }
@@ -51,15 +51,15 @@ protected function renderNewCommentsNodeLinks(array $node_ids) {
     $post = implode('&', $post);
 
     // Perform HTTP request.
-    return $this->curlExec(array(
-      CURLOPT_URL => \Drupal::url('comment.new_comments_node_links', array(), array('absolute' => TRUE)),
+    return $this->curlExec([
+      CURLOPT_URL => \Drupal::url('comment.new_comments_node_links', [], ['absolute' => TRUE]),
       CURLOPT_POST => TRUE,
       CURLOPT_POSTFIELDS => $post,
-      CURLOPT_HTTPHEADER => array(
+      CURLOPT_HTTPHEADER => [
         'Accept: application/json',
         'Content-Type: application/x-www-form-urlencoded',
-      ),
-    ));
+      ],
+    ]);
   }
 
   /**
@@ -70,7 +70,7 @@ public function testCommentNewCommentsIndicator() {
     // node.
     $this->drupalLogin($this->adminUser);
     $this->drupalGet('node');
-    $this->assertNoLink(t('@count comments', array('@count' => 0)));
+    $this->assertNoLink(t('@count comments', ['@count' => 0]));
     $this->assertLink(t('Read more'));
     // Verify the data-history-node-last-comment-timestamp attribute, which is
     // used by the drupal.node-new-comments-link library to determine whether
@@ -81,7 +81,7 @@ public function testCommentNewCommentsIndicator() {
     // Create a new comment. This helper function may be run with different
     // comment settings so use $comment->save() to avoid complex setup.
     /** @var \Drupal\comment\CommentInterface $comment */
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'cid' => NULL,
       'entity_id' => $this->node->id(),
       'entity_type' => 'node',
@@ -92,8 +92,8 @@ public function testCommentNewCommentsIndicator() {
       'subject' => $this->randomMachineName(),
       'hostname' => '127.0.0.1',
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-      'comment_body' => array(LanguageInterface::LANGCODE_NOT_SPECIFIED => array($this->randomMachineName())),
-    ));
+      'comment_body' => [LanguageInterface::LANGCODE_NOT_SPECIFIED => [$this->randomMachineName()]],
+    ]);
     $comment->save();
     $this->drupalLogout();
 
@@ -126,24 +126,24 @@ public function testCommentNewCommentsIndicator() {
     ]);
     // Pretend the data was not present in drupalSettings, i.e. test the
     // separate request to the server.
-    $response = $this->renderNewCommentsNodeLinks(array($this->node->id()));
+    $response = $this->renderNewCommentsNodeLinks([$this->node->id()]);
     $this->assertResponse(200);
     $json = Json::decode($response);
-    $expected = array($this->node->id() => array(
+    $expected = [$this->node->id() => [
       'new_comment_count' => 1,
-      'first_new_comment_link' => $this->node->url('canonical', array('fragment' => 'new')),
-    ));
+      'first_new_comment_link' => $this->node->url('canonical', ['fragment' => 'new']),
+    ]];
     $this->assertIdentical($expected, $json);
 
     // Failing to specify node IDs for the endpoint should return a 404.
-    $this->renderNewCommentsNodeLinks(array());
+    $this->renderNewCommentsNodeLinks([]);
     $this->assertResponse(404);
 
     // Accessing the endpoint as the anonymous user should return a 403.
     $this->drupalLogout();
-    $this->renderNewCommentsNodeLinks(array($this->node->id()));
+    $this->renderNewCommentsNodeLinks([$this->node->id()]);
     $this->assertResponse(403);
-    $this->renderNewCommentsNodeLinks(array());
+    $this->renderNewCommentsNodeLinks([]);
     $this->assertResponse(403);
   }
 
diff --git a/core/modules/comment/src/Tests/CommentNodeAccessTest.php b/core/modules/comment/src/Tests/CommentNodeAccessTest.php
index e69bfdeda5d0c138ab9e4f86aa2d013f01e3beff..60f8bbdd5ad07d5a937a6ebb0a3f64e08cb685d4 100644
--- a/core/modules/comment/src/Tests/CommentNodeAccessTest.php
+++ b/core/modules/comment/src/Tests/CommentNodeAccessTest.php
@@ -19,7 +19,7 @@ class CommentNodeAccessTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_access_test');
+  public static $modules = ['node_access_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -27,14 +27,14 @@ protected function setUp() {
     node_access_rebuild();
 
     // Re-create user.
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'access comments',
       'post comments',
       'create article content',
       'edit own comments',
       'node test view',
       'skip comment approval',
-    ));
+    ]);
 
     // Set the author of the created node to the web_user uid.
     $this->node->setOwnerId($this->webUser->id())->save();
diff --git a/core/modules/comment/src/Tests/CommentNodeChangesTest.php b/core/modules/comment/src/Tests/CommentNodeChangesTest.php
index 9fed4df887864eb62d97848de8bcfe855fbbd388..7724f9979a0488135bbaf4943bcbedd9e7d082f5 100644
--- a/core/modules/comment/src/Tests/CommentNodeChangesTest.php
+++ b/core/modules/comment/src/Tests/CommentNodeChangesTest.php
@@ -27,7 +27,7 @@ function testNodeDeletion() {
     $this->assertNotNull(FieldStorageConfig::load('node.comment'), 'Comment field storage exists');
     $this->assertNotNull(FieldConfig::load('node.article.comment'), 'Comment field exists');
     // Delete the node type.
-    entity_delete_multiple('node_type', array($this->node->bundle()));
+    entity_delete_multiple('node_type', [$this->node->bundle()]);
     $this->assertNull(FieldStorageConfig::load('node.comment'), 'Comment field storage deleted');
     $this->assertNull(FieldConfig::load('node.article.comment'), 'Comment field deleted');
   }
diff --git a/core/modules/comment/src/Tests/CommentNonNodeTest.php b/core/modules/comment/src/Tests/CommentNonNodeTest.php
index e43e0bc42a604ff16027cdad2a67d0c772645c3e..bc40c9d8adff71d448c304bb02b12d04cf25eaf3 100644
--- a/core/modules/comment/src/Tests/CommentNonNodeTest.php
+++ b/core/modules/comment/src/Tests/CommentNonNodeTest.php
@@ -24,7 +24,7 @@ class CommentNonNodeTest extends WebTestBase {
   use FieldUiTestTrait;
   use CommentTestTrait;
 
-  public static $modules = array('comment', 'user', 'field_ui', 'entity_test', 'block');
+  public static $modules = ['comment', 'user', 'field_ui', 'entity_test', 'block'];
 
   /**
    * An administrative user with permission to configure comment settings.
@@ -50,12 +50,12 @@ protected function setUp() {
 
     // Create a bundle for entity_test.
     entity_test_create_bundle('entity_test', 'Entity Test', 'entity_test');
-    CommentType::create(array(
+    CommentType::create([
       'id' => 'comment',
       'label' => 'Comment settings',
       'description' => 'Comment settings',
       'target_entity_type_id' => 'entity_test',
-    ))->save();
+    ])->save();
     // Create comment field on entity_test bundle.
     $this->addDefaultCommentField('entity_test', 'entity_test');
 
@@ -64,30 +64,30 @@ protected function setUp() {
     $this->assertEqual($bundles['comment']['label'], 'Comment settings');
 
     // Create test user.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer comments',
       'skip comment approval',
       'post comments',
       'access comments',
       'view test entity',
       'administer entity_test content',
-    ));
+    ]);
 
     // Enable anonymous and authenticated user comments.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments',
       'post comments',
       'skip comment approval',
-    ));
-    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array(
+    ]);
+    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, [
       'access comments',
       'post comments',
       'skip comment approval',
-    ));
+    ]);
 
     // Create a test entity.
     $random_label = $this->randomMachineName();
-    $data = array('type' => 'entity_test', 'name' => $random_label);
+    $data = ['type' => 'entity_test', 'name' => $random_label];
     $this->entity = EntityTest::create($data);
     $this->entity->save();
   }
@@ -109,7 +109,7 @@ protected function setUp() {
    *   The new comment entity.
    */
   function postComment(EntityInterface $entity, $comment, $subject = '', $contact = NULL) {
-    $edit = array();
+    $edit = [];
     $edit['comment_body[0][value]'] = $comment;
 
     $field = FieldConfig::loadByName('entity_test', 'entity_test', 'comment');
@@ -151,7 +151,7 @@ function postComment(EntityInterface $entity, $comment, $subject = '', $contact
         $this->drupalPostForm(NULL, $edit, t('Save'));
         break;
     }
-    $match = array();
+    $match = [];
     // Get comment ID
     preg_match('/#comment-([0-9]+)/', $this->getURL(), $match);
 
@@ -216,17 +216,17 @@ function commentContactInfoAvailable() {
    *   Operation is found on approval page.
    */
   function performCommentOperation($comment, $operation, $approval = FALSE) {
-    $edit = array();
+    $edit = [];
     $edit['operation'] = $operation;
     $edit['comments[' . $comment->id() . ']'] = TRUE;
     $this->drupalPostForm('admin/content/comment' . ($approval ? '/approval' : ''), $edit, t('Update'));
 
     if ($operation == 'delete') {
-      $this->drupalPostForm(NULL, array(), t('Delete comments'));
-      $this->assertRaw(\Drupal::translation()->formatPlural(1, 'Deleted 1 comment.', 'Deleted @count comments.'), format_string('Operation "@operation" was performed on comment.', array('@operation' => $operation)));
+      $this->drupalPostForm(NULL, [], t('Delete comments'));
+      $this->assertRaw(\Drupal::translation()->formatPlural(1, 'Deleted 1 comment.', 'Deleted @count comments.'), format_string('Operation "@operation" was performed on comment.', ['@operation' => $operation]));
     }
     else {
-      $this->assertText(t('The update has been performed.'), format_string('Operation "@operation" was performed on comment.', array('@operation' => $operation)));
+      $this->assertText(t('The update has been performed.'), format_string('Operation "@operation" was performed on comment.', ['@operation' => $operation]));
     }
   }
 
@@ -250,9 +250,9 @@ function getUnapprovedComment($subject) {
    * Tests anonymous comment functionality.
    */
   function testCommentFunctionality() {
-    $limited_user = $this->drupalCreateUser(array(
+    $limited_user = $this->drupalCreateUser([
       'administer entity_test fields'
-    ));
+    ]);
     $this->drupalLogin($limited_user);
     // Test that default field exists.
     $this->drupalGet('entity_test/structure/entity_test/fields');
@@ -320,9 +320,9 @@ function testCommentFunctionality() {
 
     // Check that entity access applies to administrative page.
     $this->assertText($this->entity->label(), 'Name of commented account found.');
-    $limited_user = $this->drupalCreateUser(array(
+    $limited_user = $this->drupalCreateUser([
       'administer comments',
-    ));
+    ]);
     $this->drupalLogin($limited_user);
     $this->drupalGet('admin/content/comment');
     $this->assertNoText($this->entity->label(), 'No commented account name found.');
@@ -330,12 +330,12 @@ function testCommentFunctionality() {
     $this->drupalLogout();
 
     // Deny anonymous users access to comments.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => FALSE,
       'post comments' => FALSE,
       'skip comment approval' => FALSE,
       'view test entity' => TRUE,
-    ));
+    ]);
 
     // Attempt to view comments while disallowed.
     $this->drupalGet('entity-test/' . $this->entity->id());
@@ -348,12 +348,12 @@ function testCommentFunctionality() {
     $this->assertNoFieldByName('subject[0][value]', '', 'Subject field not found.');
     $this->assertNoFieldByName('comment_body[0][value]', '', 'Comment field not found.');
 
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => TRUE,
       'post comments' => FALSE,
       'view test entity' => TRUE,
       'skip comment approval' => FALSE,
-    ));
+    ]);
     $this->drupalGet('entity_test/' . $this->entity->id());
     $this->assertPattern('@<h2[^>]*>Comments</h2>@', 'Comments were displayed.');
     $this->assertLink('Log in', 0, 'Link to login was found.');
@@ -364,12 +364,12 @@ function testCommentFunctionality() {
     // Test the combination of anonymous users being able to post, but not view
     // comments, to ensure that access to post comments doesn't grant access to
     // view them.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => FALSE,
       'post comments' => TRUE,
       'skip comment approval' => TRUE,
       'view test entity' => TRUE,
-    ));
+    ]);
     $this->drupalGet('entity_test/' . $this->entity->id());
     $this->assertNoPattern('@<h2[^>]*>Comments</h2>@', 'Comments were not displayed.');
     $this->assertFieldByName('subject[0][value]', '', 'Subject field found.');
@@ -380,22 +380,22 @@ function testCommentFunctionality() {
     $this->assertNoText($comment1->getSubject(), 'Comment not displayed.');
 
     // Test comment field widget changes.
-    $limited_user = $this->drupalCreateUser(array(
+    $limited_user = $this->drupalCreateUser([
       'administer entity_test fields',
       'view test entity',
       'administer entity_test content',
       'administer comments',
-    ));
+    ]);
     $this->drupalLogin($limited_user);
     $this->drupalGet('entity_test/structure/entity_test/fields/entity_test.entity_test.comment');
     $this->assertNoFieldChecked('edit-default-value-input-comment-0-status-0');
     $this->assertNoFieldChecked('edit-default-value-input-comment-0-status-1');
     $this->assertFieldChecked('edit-default-value-input-comment-0-status-2');
     // Test comment option change in field settings.
-    $edit = array(
+    $edit = [
       'default_value_input[comment][0][status]' => CommentItemInterface::CLOSED,
       'settings[anonymous]' => COMMENT_ANONYMOUS_MAY_CONTACT,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
     $this->drupalGet('entity_test/structure/entity_test/fields/entity_test.entity_test.comment');
     $this->assertNoFieldChecked('edit-default-value-input-comment-0-status-0');
@@ -404,18 +404,18 @@ function testCommentFunctionality() {
     $this->assertFieldByName('settings[anonymous]', COMMENT_ANONYMOUS_MAY_CONTACT);
 
     // Add a new comment-type.
-    $bundle = CommentType::create(array(
+    $bundle = CommentType::create([
       'id' => 'foobar',
       'label' => 'Foobar',
       'description' => '',
       'target_entity_type_id' => 'entity_test',
-    ));
+    ]);
     $bundle->save();
 
     // Add a new comment field.
-    $storage_edit = array(
+    $storage_edit = [
       'settings[comment_type]' => 'foobar',
-    );
+    ];
     $this->fieldUIAddNewField('entity_test/structure/entity_test', 'foobar', 'Foobar', 'comment', $storage_edit);
 
     // Add a third comment field.
@@ -429,7 +429,7 @@ function testCommentFunctionality() {
 
     // Test the new entity commenting inherits default.
     $random_label = $this->randomMachineName();
-    $data = array('bundle' => 'entity_test', 'name' => $random_label);
+    $data = ['bundle' => 'entity_test', 'name' => $random_label];
     $new_entity = EntityTest::create($data);
     $new_entity->save();
     $this->drupalGet('entity_test/manage/' . $new_entity->id() . '/edit');
@@ -443,12 +443,12 @@ function testCommentFunctionality() {
     $this->assertNoFieldByName('comment_body[0][value]', '', 'Comment field found.');
 
     // Test removal of comment_body field.
-    $limited_user = $this->drupalCreateUser(array(
+    $limited_user = $this->drupalCreateUser([
       'administer entity_test fields',
       'post comments',
       'administer comment fields',
       'administer comment types',
-    ));
+    ]);
     $this->drupalLogin($limited_user);
 
     $this->drupalGet('comment/reply/entity_test/' . $this->entity->id() . '/comment');
@@ -467,9 +467,9 @@ function testCommentFunctionality() {
   public function testsNonIntegerIdEntities() {
     // Create a bundle for entity_test_string_id.
     entity_test_create_bundle('entity_test', 'Entity Test', 'entity_test_string_id');
-    $limited_user = $this->drupalCreateUser(array(
+    $limited_user = $this->drupalCreateUser([
       'administer entity_test_string_id fields',
-    ));
+    ]);
     $this->drupalLogin($limited_user);
     // Visit the Field UI field add page.
     $this->drupalGet('entity_test_string_id/structure/entity_test/fields/add-field');
@@ -480,9 +480,9 @@ public function testsNonIntegerIdEntities() {
 
     // Create a bundle for entity_test_no_id.
     entity_test_create_bundle('entity_test', 'Entity Test', 'entity_test_no_id');
-    $this->drupalLogin($this->drupalCreateUser(array(
+    $this->drupalLogin($this->drupalCreateUser([
       'administer entity_test_no_id fields',
-    )));
+    ]));
     // Visit the Field UI field add page.
     $this->drupalGet('entity_test_no_id/structure/entity_test/fields/add-field');
     // Ensure field isn't shown for empty IDs.
diff --git a/core/modules/comment/src/Tests/CommentPagerTest.php b/core/modules/comment/src/Tests/CommentPagerTest.php
index aa7d09997bf8f327951e623adb379cc496ac8e03..1bfda557f50256fecdc63c74dc3f5af24a9cb999 100644
--- a/core/modules/comment/src/Tests/CommentPagerTest.php
+++ b/core/modules/comment/src/Tests/CommentPagerTest.php
@@ -24,8 +24,8 @@ function testCommentPaging() {
     $this->setCommentPreview(DRUPAL_DISABLED);
 
     // Create a node and three comments.
-    $node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
-    $comments = array();
+    $node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
+    $comments = [];
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
@@ -45,13 +45,13 @@ function testCommentPaging() {
     $this->assertFalse($this->commentExists($comments[2]), 'Comment 3 does not appear on page 1.');
 
     // Check the second page.
-    $this->drupalGet('node/' . $node->id(), array('query' => array('page' => 1)));
+    $this->drupalGet('node/' . $node->id(), ['query' => ['page' => 1]]);
     $this->assertTrue($this->commentExists($comments[1]), 'Comment 2 appears on page 2.');
     $this->assertFalse($this->commentExists($comments[0]), 'Comment 1 does not appear on page 2.');
     $this->assertFalse($this->commentExists($comments[2]), 'Comment 3 does not appear on page 2.');
 
     // Check the third page.
-    $this->drupalGet('node/' . $node->id(), array('query' => array('page' => 2)));
+    $this->drupalGet('node/' . $node->id(), ['query' => ['page' => 2]]);
     $this->assertTrue($this->commentExists($comments[2]), 'Comment 3 appears on page 3.');
     $this->assertFalse($this->commentExists($comments[0]), 'Comment 1 does not appear on page 3.');
     $this->assertFalse($this->commentExists($comments[1]), 'Comment 2 does not appear on page 3.');
@@ -64,27 +64,27 @@ function testCommentPaging() {
     $this->setCommentsPerPage(2);
     // We are still in flat view - the replies should not be on the first page,
     // even though they are replies to the oldest comment.
-    $this->drupalGet('node/' . $node->id(), array('query' => array('page' => 0)));
+    $this->drupalGet('node/' . $node->id(), ['query' => ['page' => 0]]);
     $this->assertFalse($this->commentExists($reply, TRUE), 'In flat mode, reply does not appear on page 1.');
 
     // If we switch to threaded mode, the replies on the oldest comment
     // should be bumped to the first page and comment 6 should be bumped
     // to the second page.
     $this->setCommentSettings('default_mode', CommentManagerInterface::COMMENT_MODE_THREADED, 'Switched to threaded mode.');
-    $this->drupalGet('node/' . $node->id(), array('query' => array('page' => 0)));
+    $this->drupalGet('node/' . $node->id(), ['query' => ['page' => 0]]);
     $this->assertTrue($this->commentExists($reply, TRUE), 'In threaded mode, reply appears on page 1.');
     $this->assertFalse($this->commentExists($comments[1]), 'In threaded mode, comment 2 has been bumped off of page 1.');
 
     // If (# replies > # comments per page) in threaded expanded view,
     // the overage should be bumped.
     $reply2 = $this->postComment(NULL, $this->randomMachineName(), $this->randomMachineName(), TRUE);
-    $this->drupalGet('node/' . $node->id(), array('query' => array('page' => 0)));
+    $this->drupalGet('node/' . $node->id(), ['query' => ['page' => 0]]);
     $this->assertFalse($this->commentExists($reply2, TRUE), 'In threaded mode where # replies > # comments per page, the newest reply does not appear on page 1.');
 
     // Test that the page build process does not somehow generate errors when
     // # comments per page is set to 0.
     $this->setCommentsPerPage(0);
-    $this->drupalGet('node/' . $node->id(), array('query' => array('page' => 0)));
+    $this->drupalGet('node/' . $node->id(), ['query' => ['page' => 0]]);
     $this->assertFalse($this->commentExists($reply2, TRUE), 'Threaded mode works correctly when comments per page is 0.');
 
     $this->drupalLogout();
@@ -102,8 +102,8 @@ function testCommentPermalink() {
     $this->setCommentPreview(DRUPAL_DISABLED);
 
     // Create a node and three comments.
-    $node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
-    $comments = array();
+    $node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
+    $comments = [];
     $comments[] = $this->postComment($node, 'comment 1: ' . $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $comments[] = $this->postComment($node, 'comment 2: ' . $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $comments[] = $this->postComment($node, 'comment 3: ' . $this->randomMachineName(), $this->randomMachineName(), TRUE);
@@ -137,8 +137,8 @@ function testCommentOrderingThreading() {
     $this->setCommentsPerPage(1000);
 
     // Create a node and three comments.
-    $node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
-    $comments = array();
+    $node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
+    $comments = [];
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
@@ -170,7 +170,7 @@ function testCommentOrderingThreading() {
 
     $this->setCommentSettings('default_mode', CommentManagerInterface::COMMENT_MODE_FLAT, 'Comment paging changed.');
 
-    $expected_order = array(
+    $expected_order = [
       0,
       1,
       2,
@@ -178,13 +178,13 @@ function testCommentOrderingThreading() {
       4,
       5,
       6,
-    );
+    ];
     $this->drupalGet('node/' . $node->id());
     $this->assertCommentOrder($comments, $expected_order);
 
     $this->setCommentSettings('default_mode', CommentManagerInterface::COMMENT_MODE_THREADED, 'Switched to threaded mode.');
 
-    $expected_order = array(
+    $expected_order = [
       0,
       4,
       1,
@@ -192,7 +192,7 @@ function testCommentOrderingThreading() {
       6,
       2,
       5,
-    );
+    ];
     $this->drupalGet('node/' . $node->id());
     $this->assertCommentOrder($comments, $expected_order);
   }
@@ -206,7 +206,7 @@ function testCommentOrderingThreading() {
    *   An array of keys from $comments describing the expected order.
    */
   function assertCommentOrder(array $comments, array $expected_order) {
-    $expected_cids = array();
+    $expected_cids = [];
 
     // First, rekey the expected order by cid.
     foreach ($expected_order as $key) {
@@ -214,11 +214,11 @@ function assertCommentOrder(array $comments, array $expected_order) {
     }
 
     $comment_anchors = $this->xpath('//a[starts-with(@id,"comment-")]');
-    $result_order = array();
+    $result_order = [];
     foreach ($comment_anchors as $anchor) {
       $result_order[] = substr($anchor['id'], 8);
     }
-    return $this->assertEqual($expected_cids, $result_order, format_string('Comment order: expected @expected, returned @returned.', array('@expected' => implode(',', $expected_cids), '@returned' => implode(',', $result_order))));
+    return $this->assertEqual($expected_cids, $result_order, format_string('Comment order: expected @expected, returned @returned.', ['@expected' => implode(',', $expected_cids), '@returned' => implode(',', $result_order)]));
   }
 
   /**
@@ -237,8 +237,8 @@ function testCommentNewPageIndicator() {
     $this->setCommentsPerPage(1);
 
     // Create a node and three comments.
-    $node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
-    $comments = array();
+    $node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
+    $comments = [];
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
     $comments[] = $this->postComment($node, $this->randomMachineName(), $this->randomMachineName(), TRUE);
@@ -265,39 +265,39 @@ function testCommentNewPageIndicator() {
 
     $this->setCommentSettings('default_mode', CommentManagerInterface::COMMENT_MODE_FLAT, 'Comment paging changed.');
 
-    $expected_pages = array(
+    $expected_pages = [
       1 => 5, // Page of comment 5
       2 => 4, // Page of comment 4
       3 => 3, // Page of comment 3
       4 => 2, // Page of comment 2
       5 => 1, // Page of comment 1
       6 => 0, // Page of comment 0
-    );
+    ];
 
     $node = Node::load($node->id());
     foreach ($expected_pages as $new_replies => $expected_page) {
       $returned_page = \Drupal::entityManager()->getStorage('comment')
         ->getNewCommentPageNumber($node->get('comment')->comment_count, $new_replies, $node, 'comment');
-      $this->assertIdentical($expected_page, $returned_page, format_string('Flat mode, @new replies: expected page @expected, returned page @returned.', array('@new' => $new_replies, '@expected' => $expected_page, '@returned' => $returned_page)));
+      $this->assertIdentical($expected_page, $returned_page, format_string('Flat mode, @new replies: expected page @expected, returned page @returned.', ['@new' => $new_replies, '@expected' => $expected_page, '@returned' => $returned_page]));
     }
 
     $this->setCommentSettings('default_mode', CommentManagerInterface::COMMENT_MODE_THREADED, 'Switched to threaded mode.');
 
-    $expected_pages = array(
+    $expected_pages = [
       1 => 5, // Page of comment 5
       2 => 1, // Page of comment 4
       3 => 1, // Page of comment 4
       4 => 1, // Page of comment 4
       5 => 1, // Page of comment 4
       6 => 0, // Page of comment 0
-    );
+    ];
 
-    \Drupal::entityManager()->getStorage('node')->resetCache(array($node->id()));
+    \Drupal::entityManager()->getStorage('node')->resetCache([$node->id()]);
     $node = Node::load($node->id());
     foreach ($expected_pages as $new_replies => $expected_page) {
       $returned_page = \Drupal::entityManager()->getStorage('comment')
         ->getNewCommentPageNumber($node->get('comment')->comment_count, $new_replies, $node, 'comment');
-      $this->assertEqual($expected_page, $returned_page, format_string('Threaded mode, @new replies: expected page @expected, returned page @returned.', array('@new' => $new_replies, '@expected' => $expected_page, '@returned' => $returned_page)));
+      $this->assertEqual($expected_page, $returned_page, format_string('Threaded mode, @new replies: expected page @expected, returned page @returned.', ['@new' => $new_replies, '@expected' => $expected_page, '@returned' => $returned_page]));
     }
   }
 
@@ -309,39 +309,39 @@ function testTwoPagers() {
     $this->addDefaultCommentField('node', 'article', 'comment_2');
     // Set default to display comment list with unique pager id.
     entity_get_display('node', 'article', 'default')
-      ->setComponent('comment_2', array(
+      ->setComponent('comment_2', [
         'label' => 'hidden',
         'type' => 'comment_default',
         'weight' => 30,
-        'settings' => array(
+        'settings' => [
           'pager_id' => 1,
           'view_mode' => 'default',
-        )
-      ))
+        ]
+      ])
       ->save();
 
     // Make sure pager appears in formatter summary and settings form.
-    $account = $this->drupalCreateUser(array('administer node display'));
+    $account = $this->drupalCreateUser(['administer node display']);
     $this->drupalLogin($account);
     $this->drupalGet('admin/structure/types/manage/article/display');
-    $this->assertNoText(t('Pager ID: @id', array('@id' => 0)), 'No summary for standard pager');
-    $this->assertText(t('Pager ID: @id', array('@id' => 1)));
-    $this->drupalPostAjaxForm(NULL, array(), 'comment_settings_edit');
+    $this->assertNoText(t('Pager ID: @id', ['@id' => 0]), 'No summary for standard pager');
+    $this->assertText(t('Pager ID: @id', ['@id' => 1]));
+    $this->drupalPostAjaxForm(NULL, [], 'comment_settings_edit');
     // Change default pager to 2.
-    $this->drupalPostForm(NULL, array('fields[comment][settings_edit_form][settings][pager_id]' => 2), t('Save'));
-    $this->assertText(t('Pager ID: @id', array('@id' => 2)));
+    $this->drupalPostForm(NULL, ['fields[comment][settings_edit_form][settings][pager_id]' => 2], t('Save'));
+    $this->assertText(t('Pager ID: @id', ['@id' => 2]));
     // Revert the changes.
-    $this->drupalPostAjaxForm(NULL, array(), 'comment_settings_edit');
-    $this->drupalPostForm(NULL, array('fields[comment][settings_edit_form][settings][pager_id]' => 0), t('Save'));
-    $this->assertNoText(t('Pager ID: @id', array('@id' => 0)), 'No summary for standard pager');
+    $this->drupalPostAjaxForm(NULL, [], 'comment_settings_edit');
+    $this->drupalPostForm(NULL, ['fields[comment][settings_edit_form][settings][pager_id]' => 0], t('Save'));
+    $this->assertNoText(t('Pager ID: @id', ['@id' => 0]), 'No summary for standard pager');
 
     $this->drupalLogin($this->adminUser);
 
     // Add a new node with both comment fields open.
-    $node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()));
+    $node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()]);
     // Set comment options.
-    $comments = array();
-    foreach (array('comment', 'comment_2') as $field_name) {
+    $comments = [];
+    foreach (['comment', 'comment_2'] as $field_name) {
       $this->setCommentForm(TRUE, $field_name);
       $this->setCommentPreview(DRUPAL_OPTIONAL, $field_name);
       $this->setCommentSettings('default_mode', CommentManagerInterface::COMMENT_MODE_FLAT, 'Comment paging changed.', $field_name);
@@ -350,10 +350,10 @@ function testTwoPagers() {
       // needing to insert large numbers of comments.
       $this->setCommentsPerPage(1, $field_name);
       for ($i = 0; $i < 3; $i++) {
-        $comment = t('Comment @count on field @field', array(
+        $comment = t('Comment @count on field @field', [
           '@count' => $i + 1,
           '@field' => $field_name,
-        ));
+        ]);
         $comments[] = $this->postComment($node, $comment, $comment, TRUE, $field_name);
       }
     }
@@ -365,19 +365,19 @@ function testTwoPagers() {
     $this->assertRaw('Comment 1 on field comment');
     $this->assertRaw('Comment 1 on field comment_2');
     // Navigate to next page of field 1.
-    $this->clickLinkWithXPath('//h3/a[normalize-space(text())=:label]/ancestor::section[1]//a[@rel="next"]', array(':label' => 'Comment 1 on field comment'));
+    $this->clickLinkWithXPath('//h3/a[normalize-space(text())=:label]/ancestor::section[1]//a[@rel="next"]', [':label' => 'Comment 1 on field comment']);
     // Check only one pager updated.
     $this->assertRaw('Comment 2 on field comment');
     $this->assertRaw('Comment 1 on field comment_2');
     // Return to page 1.
     $this->drupalGet('node/' . $node->id());
     // Navigate to next page of field 2.
-    $this->clickLinkWithXPath('//h3/a[normalize-space(text())=:label]/ancestor::section[1]//a[@rel="next"]', array(':label' => 'Comment 1 on field comment_2'));
+    $this->clickLinkWithXPath('//h3/a[normalize-space(text())=:label]/ancestor::section[1]//a[@rel="next"]', [':label' => 'Comment 1 on field comment_2']);
     // Check only one pager updated.
     $this->assertRaw('Comment 1 on field comment');
     $this->assertRaw('Comment 2 on field comment_2');
     // Navigate to next page of field 1.
-    $this->clickLinkWithXPath('//h3/a[normalize-space(text())=:label]/ancestor::section[1]//a[@rel="next"]', array(':label' => 'Comment 1 on field comment'));
+    $this->clickLinkWithXPath('//h3/a[normalize-space(text())=:label]/ancestor::section[1]//a[@rel="next"]', [':label' => 'Comment 1 on field comment']);
     // Check only one pager updated.
     $this->assertRaw('Comment 2 on field comment');
     $this->assertRaw('Comment 2 on field comment_2');
@@ -405,15 +405,15 @@ function testTwoPagers() {
    *
    * @see WebTestBase::clickLink()
    */
-  protected function clickLinkWithXPath($xpath, $arguments = array(), $index = 0) {
+  protected function clickLinkWithXPath($xpath, $arguments = [], $index = 0) {
     $url_before = $this->getUrl();
     $urls = $this->xpath($xpath, $arguments);
     if (isset($urls[$index])) {
       $url_target = $this->getAbsoluteUrl($urls[$index]['href']);
-      $this->pass(SafeMarkup::format('Clicked link %label (@url_target) from @url_before', array('%label' => $xpath, '@url_target' => $url_target, '@url_before' => $url_before)), 'Browser');
+      $this->pass(SafeMarkup::format('Clicked link %label (@url_target) from @url_before', ['%label' => $xpath, '@url_target' => $url_target, '@url_before' => $url_before]), 'Browser');
       return $this->drupalGet($url_target);
     }
-    $this->fail(SafeMarkup::format('Link %label does not exist on @url_before', array('%label' => $xpath, '@url_before' => $url_before)), 'Browser');
+    $this->fail(SafeMarkup::format('Link %label does not exist on @url_before', ['%label' => $xpath, '@url_before' => $url_before]), 'Browser');
     return FALSE;
   }
 
diff --git a/core/modules/comment/src/Tests/CommentPreviewTest.php b/core/modules/comment/src/Tests/CommentPreviewTest.php
index 837a78aa940720741bef75483879bfb6d64cf6fc..039c6ab10bab5ddb05c70d9d37eebc346abc272c 100644
--- a/core/modules/comment/src/Tests/CommentPreviewTest.php
+++ b/core/modules/comment/src/Tests/CommentPreviewTest.php
@@ -41,7 +41,7 @@ function testCommentPreview() {
     // Test escaping of the username on the preview form.
     \Drupal::service('module_installer')->install(['user_hooks_test']);
     \Drupal::state()->set('user_hooks_test_user_format_name_alter', TRUE);
-    $edit = array();
+    $edit = [];
     $edit['subject[0][value]'] = $this->randomMachineName(8);
     $edit['comment_body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm('node/' . $this->node->id(), $edit, t('Preview'));
@@ -90,7 +90,7 @@ public function testCommentPreviewDuplicateSubmission() {
     $this->drupalLogin($this->webUser);
 
     // As the web user, fill in the comment form and preview the comment.
-    $edit = array();
+    $edit = [];
     $edit['subject[0][value]'] = $this->randomMachineName(8);
     $edit['comment_body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm('node/' . $this->node->id(), $edit, t('Preview'));
@@ -124,14 +124,14 @@ public function testCommentPreviewDuplicateSubmission() {
    * Tests comment edit, preview, and save.
    */
   function testCommentEditPreviewSave() {
-    $web_user = $this->drupalCreateUser(array('access comments', 'post comments', 'skip comment approval', 'edit own comments'));
+    $web_user = $this->drupalCreateUser(['access comments', 'post comments', 'skip comment approval', 'edit own comments']);
     $this->drupalLogin($this->adminUser);
     $this->setCommentPreview(DRUPAL_OPTIONAL);
     $this->setCommentForm(TRUE);
     $this->setCommentSubject(TRUE);
     $this->setCommentSettings('default_mode', CommentManagerInterface::COMMENT_MODE_THREADED, 'Comment paging changed.');
 
-    $edit = array();
+    $edit = [];
     $date = new DrupalDateTime('2008-03-02 17:23');
     $edit['subject[0][value]'] = $this->randomMachineName(8);
     $edit['comment_body[0][value]'] = $this->randomMachineName(16);
@@ -172,7 +172,7 @@ function testCommentEditPreviewSave() {
     $this->assertFieldByName('date[time]', $expected_form_time, 'Time field displayed.');
 
     // Submit the form using the displayed values.
-    $displayed = array();
+    $displayed = [];
     $displayed['subject[0][value]'] = (string) current($this->xpath("//input[@id='edit-subject-0-value']/@value"));
     $displayed['comment_body[0][value]'] = (string) current($this->xpath("//textarea[@id='edit-comment-body-0-value']"));
     $displayed['uid'] = (string) current($this->xpath("//input[@id='edit-uid']/@value"));
@@ -182,7 +182,7 @@ function testCommentEditPreviewSave() {
 
     // Check that the saved comment is still correct.
     $comment_storage = \Drupal::entityManager()->getStorage('comment');
-    $comment_storage->resetCache(array($comment->id()));
+    $comment_storage->resetCache([$comment->id()]);
     /** @var \Drupal\comment\CommentInterface $comment_loaded */
     $comment_loaded = Comment::load($comment->id());
     $this->assertEqual($comment_loaded->getSubject(), $edit['subject[0][value]'], 'Subject loaded.');
@@ -193,13 +193,13 @@ function testCommentEditPreviewSave() {
 
     // Check that the date and time of the comment are correct when edited by
     // non-admin users.
-    $user_edit = array();
+    $user_edit = [];
     $expected_created_time = $comment_loaded->getCreatedTime();
     $this->drupalLogin($web_user);
     // Web user cannot change the comment author.
     unset($edit['uid']);
     $this->drupalPostForm('comment/' . $comment->id() . '/edit', $user_edit, t('Save'));
-    $comment_storage->resetCache(array($comment->id()));
+    $comment_storage->resetCache([$comment->id()]);
     $comment_loaded = Comment::load($comment->id());
     $this->assertEqual($comment_loaded->getCreatedTime(), $expected_created_time, 'Expected date and time for comment edited.');
     $this->drupalLogout();
diff --git a/core/modules/comment/src/Tests/CommentRssTest.php b/core/modules/comment/src/Tests/CommentRssTest.php
index ec673dfb46ead612d4fefe1e930781164958c038..5c9fe3d667f13229e8a7dd345a04f9c083d7a090 100644
--- a/core/modules/comment/src/Tests/CommentRssTest.php
+++ b/core/modules/comment/src/Tests/CommentRssTest.php
@@ -21,7 +21,7 @@ class CommentRssTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $modules = array('views');
+  public static $modules = ['views'];
 
   /**
    * {@inheritdoc}
@@ -66,7 +66,7 @@ function testCommentRss() {
       'user:3',
     ]));
 
-    $raw = '<comments>' . $this->node->url('canonical', array('fragment' => 'comments', 'absolute' => TRUE)) . '</comments>';
+    $raw = '<comments>' . $this->node->url('canonical', ['fragment' => 'comments', 'absolute' => TRUE]) . '</comments>';
     $this->assertRaw($raw, 'Comments as part of RSS feed.');
 
     // Hide comments from RSS feed and check presence.
diff --git a/core/modules/comment/src/Tests/CommentStatisticsTest.php b/core/modules/comment/src/Tests/CommentStatisticsTest.php
index 0c370d1127a0ba643ecdbb66f7316812567292cc..bd0838ca5d2d14941084164163797ca868b73257 100644
--- a/core/modules/comment/src/Tests/CommentStatisticsTest.php
+++ b/core/modules/comment/src/Tests/CommentStatisticsTest.php
@@ -24,7 +24,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create a second user to post comments.
-    $this->webUser2 = $this->drupalCreateUser(array(
+    $this->webUser2 = $this->drupalCreateUser([
       'post comments',
       'create article content',
       'edit own comments',
@@ -32,7 +32,7 @@ protected function setUp() {
       'skip comment approval',
       'access comments',
       'access content',
-    ));
+    ]);
   }
 
   /**
@@ -62,7 +62,7 @@ function testCommentNodeCommentStatistics() {
 
     // Checks the new values of node comment statistics with comment #1.
     // The node cache needs to be reset before reload.
-    $node_storage->resetCache(array($this->node->id()));
+    $node_storage->resetCache([$this->node->id()]);
     $node = $node_storage->load($this->node->id());
     $this->assertEqual($node->get('comment')->last_comment_name, NULL, 'The value of node last_comment_name is NULL.');
     $this->assertEqual($node->get('comment')->last_comment_uid, $this->webUser2->id(), 'The value of node last_comment_uid is the comment #1 uid.');
@@ -70,11 +70,11 @@ function testCommentNodeCommentStatistics() {
 
     // Prepare for anonymous comment submission (comment approval enabled).
     $this->drupalLogin($this->adminUser);
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => TRUE,
       'post comments' => TRUE,
       'skip comment approval' => FALSE,
-    ));
+    ]);
     // Ensure that the poster can leave some contact info.
     $this->setCommentAnonymous('1');
     $this->drupalLogout();
@@ -86,7 +86,7 @@ function testCommentNodeCommentStatistics() {
     // Checks the new values of node comment statistics with comment #2 and
     // ensure they haven't changed since the comment has not been moderated.
     // The node needs to be reloaded with the cache reset.
-    $node_storage->resetCache(array($this->node->id()));
+    $node_storage->resetCache([$this->node->id()]);
     $node = $node_storage->load($this->node->id());
     $this->assertEqual($node->get('comment')->last_comment_name, NULL, 'The value of node last_comment_name is still NULL.');
     $this->assertEqual($node->get('comment')->last_comment_uid, $this->webUser2->id(), 'The value of node last_comment_uid is still the comment #1 uid.');
@@ -94,21 +94,21 @@ function testCommentNodeCommentStatistics() {
 
     // Prepare for anonymous comment submission (no approval required).
     $this->drupalLogin($this->adminUser);
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => TRUE,
       'post comments' => TRUE,
       'skip comment approval' => TRUE,
-    ));
+    ]);
     $this->drupalLogout();
 
     // Post comment #3 as anonymous.
     $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
-    $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), '', array('name' => $this->randomMachineName()));
+    $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), '', ['name' => $this->randomMachineName()]);
     $comment_loaded = Comment::load($anonymous_comment->id());
 
     // Checks the new values of node comment statistics with comment #3.
     // The node needs to be reloaded with the cache reset.
-    $node_storage->resetCache(array($this->node->id()));
+    $node_storage->resetCache([$this->node->id()]);
     $node = $node_storage->load($this->node->id());
     $this->assertEqual($node->get('comment')->last_comment_name, $comment_loaded->getAuthorName(), 'The value of node last_comment_name is the name of the anonymous user.');
     $this->assertEqual($node->get('comment')->last_comment_uid, 0, 'The value of node last_comment_uid is zero.');
diff --git a/core/modules/comment/src/Tests/CommentTestBase.php b/core/modules/comment/src/Tests/CommentTestBase.php
index c99dd32fc4fe4b239c5099b56bb9e2b549de8f91..716b3bd96fea10decc8ffc11673b69a3589c2d33 100644
--- a/core/modules/comment/src/Tests/CommentTestBase.php
+++ b/core/modules/comment/src/Tests/CommentTestBase.php
@@ -52,11 +52,11 @@ protected function setUp() {
     // child classes may specify the standard profile.
     $types = NodeType::loadMultiple();
     if (empty($types['article'])) {
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => t('Article')));
+      $this->drupalCreateContentType(['type' => 'article', 'name' => t('Article')]);
     }
 
     // Create two test users.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer content types',
       'administer comments',
       'administer comment types',
@@ -69,21 +69,21 @@ protected function setUp() {
       // permission is granted.
       'access user profiles',
       'access content',
-     ));
-    $this->webUser = $this->drupalCreateUser(array(
+     ]);
+    $this->webUser = $this->drupalCreateUser([
       'access comments',
       'post comments',
       'create article content',
       'edit own comments',
       'skip comment approval',
       'access content',
-    ));
+    ]);
 
     // Create comment field on article.
     $this->addDefaultCommentField('node', 'article');
 
     // Create a test node authored by the web user.
-    $this->node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()));
+    $this->node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()]);
     $this->drupalPlaceBlock('local_tasks_block');
   }
 
@@ -107,7 +107,7 @@ protected function setUp() {
    *   The posted comment or NULL when posted comment was not found.
    */
   public function postComment($entity, $comment, $subject = '', $contact = NULL, $field_name = 'comment') {
-    $edit = array();
+    $edit = [];
     $edit['comment_body[0][value]'] = $comment;
 
     if ($entity !== NULL) {
@@ -154,7 +154,7 @@ public function postComment($entity, $comment, $subject = '', $contact = NULL, $
         $this->drupalPostForm(NULL, $edit, t('Save'));
         break;
     }
-    $match = array();
+    $match = [];
     // Get comment ID
     preg_match('/#comment-([0-9]+)/', $this->getURL(), $match);
 
@@ -168,7 +168,7 @@ public function postComment($entity, $comment, $subject = '', $contact = NULL, $
     }
 
     if (isset($match[1])) {
-      \Drupal::entityManager()->getStorage('comment')->resetCache(array($match[1]));
+      \Drupal::entityManager()->getStorage('comment')->resetCache([$match[1]]);
       return Comment::load($match[1]);
     }
   }
@@ -215,7 +215,7 @@ function commentExists(CommentInterface $comment = NULL, $reply = FALSE) {
    *   Comment to delete.
    */
   function deleteComment(CommentInterface $comment) {
-    $this->drupalPostForm('comment/' . $comment->id() . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('comment/' . $comment->id() . '/delete', [], t('Delete'));
     $this->assertText(t('The comment and all its replies have been deleted.'), 'Comment deleted.');
   }
 
@@ -228,9 +228,9 @@ function deleteComment(CommentInterface $comment) {
   public function setCommentSubject($enabled) {
     $form_display = entity_get_form_display('comment', 'comment', 'default');
     if ($enabled) {
-      $form_display->setComponent('subject', array(
+      $form_display->setComponent('subject', [
         'type' => 'string_textfield',
-      ));
+      ]);
     }
     else {
       $form_display->removeComponent('subject');
@@ -263,7 +263,7 @@ public function setCommentPreview($mode, $field_name = 'comment') {
         $mode_text = 'required';
         break;
     }
-    $this->setCommentSettings('preview', $mode, format_string('Comment preview @mode_text.', array('@mode_text' => $mode_text)), $field_name);
+    $this->setCommentSettings('preview', $mode, format_string('Comment preview @mode_text.', ['@mode_text' => $mode_text]), $field_name);
   }
 
   /**
@@ -290,7 +290,7 @@ public function setCommentForm($enabled, $field_name = 'comment') {
    *   - 2: Contact information required.
    */
   function setCommentAnonymous($level) {
-    $this->setCommentSettings('anonymous', $level, format_string('Anonymous commenting set to level @level.', array('@level' => $level)));
+    $this->setCommentSettings('anonymous', $level, format_string('Anonymous commenting set to level @level.', ['@level' => $level]));
   }
 
   /**
@@ -303,7 +303,7 @@ function setCommentAnonymous($level) {
    *   Defaults to 'comment'.
    */
   public function setCommentsPerPage($number, $field_name = 'comment') {
-    $this->setCommentSettings('per_page', $number, format_string('Number of comments per page set to @number.', array('@number' => $number)), $field_name);
+    $this->setCommentSettings('per_page', $number, format_string('Number of comments per page set to @number.', ['@number' => $number]), $field_name);
   }
 
   /**
@@ -348,17 +348,17 @@ function commentContactInfoAvailable() {
    *   Operation is found on approval page.
    */
   function performCommentOperation(CommentInterface $comment, $operation, $approval = FALSE) {
-    $edit = array();
+    $edit = [];
     $edit['operation'] = $operation;
     $edit['comments[' . $comment->id() . ']'] = TRUE;
     $this->drupalPostForm('admin/content/comment' . ($approval ? '/approval' : ''), $edit, t('Update'));
 
     if ($operation == 'delete') {
-      $this->drupalPostForm(NULL, array(), t('Delete comments'));
-      $this->assertRaw(\Drupal::translation()->formatPlural(1, 'Deleted 1 comment.', 'Deleted @count comments.'), format_string('Operation "@operation" was performed on comment.', array('@operation' => $operation)));
+      $this->drupalPostForm(NULL, [], t('Delete comments'));
+      $this->assertRaw(\Drupal::translation()->formatPlural(1, 'Deleted 1 comment.', 'Deleted @count comments.'), format_string('Operation "@operation" was performed on comment.', ['@operation' => $operation]));
     }
     else {
-      $this->assertText(t('The update has been performed.'), format_string('Operation "@operation" was performed on comment.', array('@operation' => $operation)));
+      $this->assertText(t('The update has been performed.'), format_string('Operation "@operation" was performed on comment.', ['@operation' => $operation]));
     }
   }
 
@@ -388,12 +388,12 @@ function getUnapprovedComment($subject) {
    *   Created comment type.
    */
   protected function createCommentType($label) {
-    $bundle = CommentType::create(array(
+    $bundle = CommentType::create([
       'id' => $label,
       'label' => $label,
       'description' => '',
       'target_entity_type_id' => 'node',
-    ));
+    ]);
     $bundle->save();
     return $bundle;
   }
diff --git a/core/modules/comment/src/Tests/CommentTestTrait.php b/core/modules/comment/src/Tests/CommentTestTrait.php
index f22d80f8939ffbd6a13fde784c218daaa0a06791..038a3df0910fa0f8a0100bfa7577ce1b52373743 100644
--- a/core/modules/comment/src/Tests/CommentTestTrait.php
+++ b/core/modules/comment/src/Tests/CommentTestTrait.php
@@ -43,12 +43,12 @@ public function addDefaultCommentField($entity_type, $bundle, $field_name = 'com
       }
     }
     else {
-      $comment_type_storage->create(array(
+      $comment_type_storage->create([
         'id' => $comment_type_id,
         'label' => Unicode::ucfirst($comment_type_id),
         'target_entity_type_id' => $entity_type,
         'description' => 'Default comment field',
-      ))->save();
+      ])->save();
     }
     // Add a body field to the comment type.
     \Drupal::service('comment.manager')->addBodyField($comment_type_id);
@@ -56,43 +56,43 @@ public function addDefaultCommentField($entity_type, $bundle, $field_name = 'com
     // Add a comment field to the host entity type. Create the field storage if
     // needed.
     if (!array_key_exists($field_name, $entity_manager->getFieldStorageDefinitions($entity_type))) {
-      $entity_manager->getStorage('field_storage_config')->create(array(
+      $entity_manager->getStorage('field_storage_config')->create([
         'entity_type' => $entity_type,
         'field_name' => $field_name,
         'type' => 'comment',
         'translatable' => TRUE,
-        'settings' => array(
+        'settings' => [
           'comment_type' => $comment_type_id,
-        ),
-      ))->save();
+        ],
+      ])->save();
     }
     // Create the field if needed, and configure its form and view displays.
     if (!array_key_exists($field_name, $entity_manager->getFieldDefinitions($entity_type, $bundle))) {
-      $entity_manager->getStorage('field_config')->create(array(
+      $entity_manager->getStorage('field_config')->create([
         'label' => 'Comments',
         'description' => '',
         'field_name' => $field_name,
         'entity_type' => $entity_type,
         'bundle' => $bundle,
         'required' => 1,
-        'default_value' => array(
-          array(
+        'default_value' => [
+          [
             'status' => $default_value,
             'cid' => 0,
             'last_comment_name' => '',
             'last_comment_timestamp' => 0,
             'last_comment_uid' => 0,
-          ),
-        ),
-      ))->save();
+          ],
+        ],
+      ])->save();
 
       // Entity form displays: assign widget settings for the 'default' form
       // mode, and hide the field in all other form modes.
       entity_get_form_display($entity_type, $bundle, 'default')
-        ->setComponent($field_name, array(
+        ->setComponent($field_name, [
           'type' => 'comment_default',
           'weight' => 20,
-        ))
+        ])
         ->save();
       foreach ($entity_manager->getFormModes($entity_type) as $id => $form_mode) {
         $display = entity_get_form_display($entity_type, $bundle, $id);
@@ -105,12 +105,12 @@ public function addDefaultCommentField($entity_type, $bundle, $field_name = 'com
       // Entity view displays: assign widget settings for the 'default' view
       // mode, and hide the field in all other view modes.
       entity_get_display($entity_type, $bundle, 'default')
-        ->setComponent($field_name, array(
+        ->setComponent($field_name, [
           'label' => 'above',
           'type' => 'comment_default',
           'weight' => 20,
-          'settings' => array('view_mode' => $comment_view_mode),
-        ))
+          'settings' => ['view_mode' => $comment_view_mode],
+        ])
         ->save();
       foreach ($entity_manager->getViewModes($entity_type) as $id => $view_mode) {
         $display = entity_get_display($entity_type, $bundle, $id);
diff --git a/core/modules/comment/src/Tests/CommentThreadingTest.php b/core/modules/comment/src/Tests/CommentThreadingTest.php
index c8ea93e276cc7a71c90acc6b3f369e4e456dc404..2dbf5bdea8575971a9a1c9accbd6a2f6f70bf8a8 100644
--- a/core/modules/comment/src/Tests/CommentThreadingTest.php
+++ b/core/modules/comment/src/Tests/CommentThreadingTest.php
@@ -24,7 +24,7 @@ function testCommentThreading() {
 
     // Create a node.
     $this->drupalLogin($this->webUser);
-    $this->node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()));
+    $this->node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()]);
 
     // Post comment #1.
     $this->drupalLogin($this->webUser);
@@ -139,10 +139,10 @@ protected function assertParentLink($cid, $pid) {
 
     $this->assertFieldByXpath($pattern, NULL, format_string(
       'Comment %cid has a link to parent %pid.',
-      array(
+      [
         '%cid' => $cid,
         '%pid' => $pid,
-      )
+      ]
     ));
   }
 
@@ -162,9 +162,9 @@ protected function assertNoParentLink($cid) {
     $pattern = "//a[@id='comment-$cid']/following-sibling::article//p[contains(@class, 'parent')]";
     $this->assertNoFieldByXpath($pattern, NULL, format_string(
       'Comment %cid does not have a link to a parent.',
-      array(
+      [
         '%cid' => $cid,
-      )
+      ]
     ));
   }
 
diff --git a/core/modules/comment/src/Tests/CommentTitleTest.php b/core/modules/comment/src/Tests/CommentTitleTest.php
index aab1cf5ec87d4d059278b78e87325ed27babbd58..30d39357bace059bad4f49c09c8700ba4612b78f 100644
--- a/core/modules/comment/src/Tests/CommentTitleTest.php
+++ b/core/modules/comment/src/Tests/CommentTitleTest.php
@@ -14,7 +14,7 @@ class CommentTitleTest extends CommentTestBase {
    */
   public function testCommentEmptyTitles() {
     // Installs module that sets comments to an empty string.
-    \Drupal::service('module_installer')->install(array('comment_empty_title_test'));
+    \Drupal::service('module_installer')->install(['comment_empty_title_test']);
 
     // Set comments to have a subject with preview disabled.
     $this->setCommentPreview(DRUPAL_DISABLED);
@@ -23,7 +23,7 @@ public function testCommentEmptyTitles() {
 
     // Create a node.
     $this->drupalLogin($this->webUser);
-    $this->node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()));
+    $this->node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()]);
 
     // Post comment #1 and verify that h3's are not rendered.
     $subject_text = $this->randomMachineName();
@@ -49,7 +49,7 @@ public function testCommentPopulatedTitles() {
 
     // Create a node.
     $this->drupalLogin($this->webUser);
-    $this->node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()));
+    $this->node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1, 'uid' => $this->webUser->id()]);
 
     // Post comment #1 and verify that title is rendered in h3.
     $subject_text = $this->randomMachineName();
diff --git a/core/modules/comment/src/Tests/CommentTokenReplaceTest.php b/core/modules/comment/src/Tests/CommentTokenReplaceTest.php
index c7b72276a15ddd3fdd93c4d9e27b78a931ea39c7..325aecb2daa429a37a913d0a3da49865218685af 100644
--- a/core/modules/comment/src/Tests/CommentTokenReplaceTest.php
+++ b/core/modules/comment/src/Tests/CommentTokenReplaceTest.php
@@ -32,10 +32,10 @@ class CommentTokenReplaceTest extends CommentTestBase {
   function testCommentTokenReplacement() {
     $token_service = \Drupal::token();
     $language_interface = \Drupal::languageManager()->getCurrentLanguage();
-    $url_options = array(
+    $url_options = [
       'absolute' => TRUE,
       'language' => $language_interface,
-    );
+    ];
 
     // Setup vocabulary.
     Vocabulary::create([
@@ -65,7 +65,7 @@ function testCommentTokenReplacement() {
     $comment->setSubject('<blink>Blinking Comment</blink>');
 
     // Generate and test tokens.
-    $tests = array();
+    $tests = [];
     $tests['[comment:cid]'] = $comment->id();
     $tests['[comment:hostname]'] = $comment->getHostname();
     $tests['[comment:author]'] = Html::escape($comment->getAuthorName());
@@ -74,11 +74,11 @@ function testCommentTokenReplacement() {
     $tests['[comment:title]'] = Html::escape($comment->getSubject());
     $tests['[comment:body]'] = $comment->comment_body->processed;
     $tests['[comment:langcode]'] = $comment->language()->getId();
-    $tests['[comment:url]'] = $comment->url('canonical', $url_options + array('fragment' => 'comment-' . $comment->id()));
+    $tests['[comment:url]'] = $comment->url('canonical', $url_options + ['fragment' => 'comment-' . $comment->id()]);
     $tests['[comment:edit-url]'] = $comment->url('edit-form', $url_options);
-    $tests['[comment:created]'] = \Drupal::service('date.formatter')->format($comment->getCreatedTime(), 'medium', array('langcode' => $language_interface->getId()));
-    $tests['[comment:created:since]'] = \Drupal::service('date.formatter')->formatTimeDiffSince($comment->getCreatedTime(), array('langcode' => $language_interface->getId()));
-    $tests['[comment:changed:since]'] = \Drupal::service('date.formatter')->formatTimeDiffSince($comment->getChangedTimeAcrossTranslations(), array('langcode' => $language_interface->getId()));
+    $tests['[comment:created]'] = \Drupal::service('date.formatter')->format($comment->getCreatedTime(), 'medium', ['langcode' => $language_interface->getId()]);
+    $tests['[comment:created:since]'] = \Drupal::service('date.formatter')->formatTimeDiffSince($comment->getCreatedTime(), ['langcode' => $language_interface->getId()]);
+    $tests['[comment:changed:since]'] = \Drupal::service('date.formatter')->formatTimeDiffSince($comment->getChangedTimeAcrossTranslations(), ['langcode' => $language_interface->getId()]);
     $tests['[comment:parent:cid]'] = $comment->hasParentComment() ? $comment->getParentComment()->id() : NULL;
     $tests['[comment:parent:title]'] = $parent_comment->getSubject();
     $tests['[comment:entity]'] = Html::escape($node->getTitle());
@@ -127,7 +127,7 @@ function testCommentTokenReplacement() {
 
     foreach ($tests as $input => $expected) {
       $bubbleable_metadata = new BubbleableMetadata();
-      $output = $token_service->replace($input, array('comment' => $comment), array('langcode' => $language_interface->getId()), $bubbleable_metadata);
+      $output = $token_service->replace($input, ['comment' => $comment], ['langcode' => $language_interface->getId()], $bubbleable_metadata);
       $this->assertEqual($output, $expected, new FormattableMarkup('Comment token %token replaced.', ['%token' => $input]));
       $this->assertEqual($bubbleable_metadata, $metadata_tests[$input]);
     }
@@ -136,8 +136,8 @@ function testCommentTokenReplacement() {
     $author_name = 'This is a random & " > string';
     $comment->setOwnerId(0)->setAuthorName($author_name);
     $input = '[comment:author]';
-    $output = $token_service->replace($input, array('comment' => $comment), array('langcode' => $language_interface->getId()));
-    $this->assertEqual($output, Html::escape($author_name), format_string('Comment author token %token replaced.', array('%token' => $input)));
+    $output = $token_service->replace($input, ['comment' => $comment], ['langcode' => $language_interface->getId()]);
+    $this->assertEqual($output, Html::escape($author_name), format_string('Comment author token %token replaced.', ['%token' => $input]));
     // Add comment field to user and term entities.
     $this->addDefaultCommentField('user', 'user', 'comment', CommentItemInterface::OPEN, 'comment_user');
     $this->addDefaultCommentField('taxonomy_term', 'tags', 'comment', CommentItemInterface::OPEN, 'comment_term');
@@ -162,7 +162,7 @@ function testCommentTokenReplacement() {
 
     // Generate comment tokens for node (it has 2 comments, both new),
     // user and term.
-    $tests = array();
+    $tests = [];
     $tests['[entity:comment-count]'] = 2;
     $tests['[entity:comment-count-new]'] = 2;
     $tests['[node:comment-count]'] = 2;
diff --git a/core/modules/comment/src/Tests/CommentTranslationUITest.php b/core/modules/comment/src/Tests/CommentTranslationUITest.php
index e89bd3f31866de844e77866d3ea220f5a2634ed6..3157e23bddb5fc7f9f9439ecb1e68b6d3fd36d14 100644
--- a/core/modules/comment/src/Tests/CommentTranslationUITest.php
+++ b/core/modules/comment/src/Tests/CommentTranslationUITest.php
@@ -46,7 +46,7 @@ class CommentTranslationUITest extends ContentTranslationUITestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'node', 'comment');
+  public static $modules = ['language', 'content_translation', 'node', 'comment'];
 
   protected function setUp() {
     $this->entityTypeId = 'comment';
@@ -62,11 +62,11 @@ protected function setUp() {
    */
   function setupBundle() {
     parent::setupBundle();
-    $this->drupalCreateContentType(array('type' => $this->nodeBundle, 'name' => $this->nodeBundle));
+    $this->drupalCreateContentType(['type' => $this->nodeBundle, 'name' => $this->nodeBundle]);
     // Add a comment field to the article content type.
     $this->addDefaultCommentField('node', 'article', 'comment_article', CommentItemInterface::OPEN, 'comment_article');
     // Create a page content type.
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'page']);
     // Add a comment field to the page content type - this one won't be
     // translatable.
     $this->addDefaultCommentField('node', 'page', 'comment');
@@ -78,7 +78,7 @@ function setupBundle() {
    * {@inheritdoc}
    */
   protected function getTranslatorPermissions() {
-    return array_merge(parent::getTranslatorPermissions(), array('post comments', 'administer comments', 'access comments'));
+    return array_merge(parent::getTranslatorPermissions(), ['post comments', 'administer comments', 'access comments']);
   }
 
   /**
@@ -95,12 +95,12 @@ protected function createEntity($values, $langcode, $comment_type = 'comment_art
       $node_type = 'page';
       $field_name = 'comment';
     }
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'type' => $node_type,
-      $field_name => array(
-        array('status' => CommentItemInterface::OPEN)
-      ),
-    ));
+      $field_name => [
+        ['status' => CommentItemInterface::OPEN]
+      ],
+    ]);
     $values['entity_id'] = $node->id();
     $values['entity_type'] = 'node';
     $values['field_name'] = $field_name;
@@ -113,10 +113,10 @@ protected function createEntity($values, $langcode, $comment_type = 'comment_art
    */
   protected function getNewEntityValues($langcode) {
     // Comment subject is not translatable hence we use a fixed value.
-    return array(
-      'subject' => array(array('value' => $this->subject)),
-      'comment_body' => array(array('value' => $this->randomMachineName(16))),
-    ) + parent::getNewEntityValues($langcode);
+    return [
+      'subject' => [['value' => $this->subject]],
+      'comment_body' => [['value' => $this->randomMachineName(16)]],
+    ] + parent::getNewEntityValues($langcode);
   }
 
   /**
@@ -132,8 +132,8 @@ protected function doTestPublishedStatus() {
     // Unpublish translations.
     foreach ($this->langcodes as $index => $langcode) {
       if ($index > 0) {
-        $edit = array('status' => 0);
-        $url = $entity->urlInfo('edit-form', array('language' => ConfigurableLanguage::load($langcode)));
+        $edit = ['status' => 0];
+        $url = $entity->urlInfo('edit-form', ['language' => ConfigurableLanguage::load($langcode)]);
         $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $langcode));
         $storage->resetCache();
         $entity = $storage->load($this->entityId);
@@ -151,21 +151,21 @@ protected function doTestAuthoringInfo() {
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
     $languages = $this->container->get('language_manager')->getLanguages();
-    $values = array();
+    $values = [];
 
     // Post different authoring information for each translation.
     foreach ($this->langcodes as $langcode) {
       $url = $entity->urlInfo('edit-form', ['language' => $languages[$langcode]]);
       $user = $this->drupalCreateUser();
-      $values[$langcode] = array(
+      $values[$langcode] = [
         'uid' => $user->id(),
         'created' => REQUEST_TIME - mt_rand(0, 1000),
-      );
-      $edit = array(
+      ];
+      $edit = [
         'uid' => $user->getUsername() . ' (' . $user->id() . ')',
         'date[date]' => format_date($values[$langcode]['created'], 'custom', 'Y-m-d'),
         'date[time]' => format_date($values[$langcode]['created'], 'custom', 'H:i:s'),
-      );
+      ];
       $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $langcode));
     }
 
@@ -182,11 +182,11 @@ protected function doTestAuthoringInfo() {
    * Tests translate link on comment content admin page.
    */
   function testTranslateLinkCommentAdminPage() {
-    $this->adminUser = $this->drupalCreateUser(array_merge(parent::getTranslatorPermissions(), array('access administration pages', 'administer comments', 'skip comment approval')));
+    $this->adminUser = $this->drupalCreateUser(array_merge(parent::getTranslatorPermissions(), ['access administration pages', 'administer comments', 'skip comment approval']));
     $this->drupalLogin($this->adminUser);
 
-    $cid_translatable = $this->createEntity(array(), $this->langcodes[0]);
-    $cid_untranslatable = $this->createEntity(array(), $this->langcodes[0], 'comment');
+    $cid_translatable = $this->createEntity([], $this->langcodes[0]);
+    $cid_untranslatable = $this->createEntity([], $this->langcodes[0], 'comment');
 
     // Verify translation links.
     $this->drupalGet('admin/content/comment');
@@ -208,15 +208,15 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
-        $title = t('Edit @type @title [%language translation]', array(
+        $title = t('Edit @type @title [%language translation]', [
           '@type' => $this->entityTypeId,
           '@title' => $entity->getTranslation($langcode)->label(),
           '%language' => $languages[$langcode]->getName(),
-        ));
+        ]);
         $this->assertRaw($title);
       }
     }
diff --git a/core/modules/comment/src/Tests/CommentTypeTest.php b/core/modules/comment/src/Tests/CommentTypeTest.php
index fb5028f719bcb8af1bd1103100339f794e5964d8..343bb9148c08bd2ecaceb74c7894ebbdaa451b76 100644
--- a/core/modules/comment/src/Tests/CommentTypeTest.php
+++ b/core/modules/comment/src/Tests/CommentTypeTest.php
@@ -27,11 +27,11 @@ class CommentTypeTest extends CommentTestBase {
    *
    * @var array
    */
-  protected $permissions = array(
+  protected $permissions = [
     'administer comments',
     'administer comment fields',
     'administer comment types',
-  );
+  ];
 
   /**
    * Sets the test up.
@@ -61,12 +61,12 @@ public function testCommentTypeCreation() {
     $this->assertResponse(200, 'The new comment type can be accessed at the edit form.');
 
     // Create a comment type via the user interface.
-    $edit = array(
+    $edit = [
       'id' => 'foo',
       'label' => 'title for foo',
       'description' => '',
       'target_entity_type_id' => 'node',
-    );
+    ];
     $this->drupalPostForm('admin/structure/comment/types/add', $edit, t('Save'));
     $comment_type = CommentType::load('foo');
     $this->assertTrue($comment_type, 'The new comment type has been created.');
@@ -81,8 +81,8 @@ public function testCommentTypeCreation() {
     $this->assertText(t('Target entity type'));
     // Save the form and ensure the entity-type value is preserved even though
     // the field isn't present.
-    $this->drupalPostForm(NULL, array(), t('Save'));
-    \Drupal::entityManager()->getStorage('comment_type')->resetCache(array('foo'));
+    $this->drupalPostForm(NULL, [], t('Save'));
+    \Drupal::entityManager()->getStorage('comment_type')->resetCache(['foo']);
     $comment_type = CommentType::load('foo');
     $this->assertEqual($comment_type->getTargetEntityTypeId(), 'node');
   }
@@ -98,9 +98,9 @@ public function testCommentTypeEditing() {
 
     // Change the comment type name.
     $this->drupalGet('admin/structure/comment');
-    $edit = array(
+    $edit = [
       'label' => 'Bar',
-    );
+    ];
     $this->drupalPostForm('admin/structure/comment/manage/comment', $edit, t('Save'));
 
     $this->drupalGet('admin/structure/comment');
@@ -110,9 +110,9 @@ public function testCommentTypeEditing() {
     $this->assertTrue($this->cssSelect('tr#comment-body'), 'Body field exists.');
 
     // Remove the body field.
-    $this->drupalPostForm('admin/structure/comment/manage/comment/fields/comment.comment.comment_body/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/structure/comment/manage/comment/fields/comment.comment.comment_body/delete', [], t('Delete'));
     // Resave the settings for this type.
-    $this->drupalPostForm('admin/structure/comment/manage/comment', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/comment/manage/comment', [], t('Save'));
     // Check that the body field doesn't exist.
     $this->drupalGet('admin/structure/comment/manage/comment/fields');
     $this->assertFalse($this->cssSelect('tr#comment-body'), 'Body field does not exist.');
@@ -124,39 +124,39 @@ public function testCommentTypeEditing() {
   public function testCommentTypeDeletion() {
     // Create a comment type programmatically.
     $type = $this->createCommentType('foo');
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     $this->addDefaultCommentField('node', 'page', 'foo', CommentItemInterface::OPEN, 'foo');
     $field_storage = FieldStorageConfig::loadByName('node', 'foo');
 
     $this->drupalLogin($this->adminUser);
 
     // Create a node.
-    $node = Node::create(array(
+    $node = Node::create([
       'type' => 'page',
       'title' => 'foo',
-    ));
+    ]);
     $node->save();
 
     // Add a new comment of this type.
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'comment_type' => 'foo',
       'entity_type' => 'node',
       'field_name' => 'foo',
       'entity_id' => $node->id(),
-    ));
+    ]);
     $comment->save();
 
     // Attempt to delete the comment type, which should not be allowed.
     $this->drupalGet('admin/structure/comment/manage/' . $type->id() . '/delete');
     $this->assertRaw(
-      t('%label is used by 1 comment on your site. You can not remove this comment type until you have removed all of the %label comments.', array('%label' => $type->label())),
+      t('%label is used by 1 comment on your site. You can not remove this comment type until you have removed all of the %label comments.', ['%label' => $type->label()]),
       'The comment type will not be deleted until all comments of that type are removed.'
     );
     $this->assertRaw(
-      t('%label is used by the %field field on your site. You can not remove this comment type until you have removed the field.', array(
+      t('%label is used by the %field field on your site. You can not remove this comment type until you have removed the field.', [
         '%label' => 'foo',
         '%field' => 'node.foo',
-      )),
+      ]),
       'The comment type will not be deleted until all fields of that type are removed.'
     );
     $this->assertNoText(t('This action cannot be undone.'), 'The comment type deletion confirmation form is not available.');
@@ -167,7 +167,7 @@ public function testCommentTypeDeletion() {
     // Attempt to delete the comment type, which should now be allowed.
     $this->drupalGet('admin/structure/comment/manage/' . $type->id() . '/delete');
     $this->assertRaw(
-      t('Are you sure you want to delete the comment type %type?', array('%type' => $type->id())),
+      t('Are you sure you want to delete the comment type %type?', ['%type' => $type->id()]),
       'The comment type is available for deletion.'
     );
     $this->assertText(t('This action cannot be undone.'), 'The comment type deletion confirmation form is available.');
@@ -182,9 +182,9 @@ public function testCommentTypeDeletion() {
     }
 
     // Delete the comment type.
-    $this->drupalPostForm('admin/structure/comment/manage/' . $type->id() . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/structure/comment/manage/' . $type->id() . '/delete', [], t('Delete'));
     $this->assertNull(CommentType::load($type->id()), 'Comment type deleted.');
-    $this->assertRaw(t('The comment type %label has been deleted.', array('%label' => $type->label())));
+    $this->assertRaw(t('The comment type %label has been deleted.', ['%label' => $type->label()]));
   }
 
 }
diff --git a/core/modules/comment/src/Tests/CommentUninstallTest.php b/core/modules/comment/src/Tests/CommentUninstallTest.php
index 4d86df947909fa5cfdd367278d6aedffb225e373..9f9d36ad012da400112775a45498e9b3b7aab218 100644
--- a/core/modules/comment/src/Tests/CommentUninstallTest.php
+++ b/core/modules/comment/src/Tests/CommentUninstallTest.php
@@ -20,13 +20,13 @@ class CommentUninstallTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('comment', 'node');
+  public static $modules = ['comment', 'node'];
 
   protected function setUp() {
     parent::setup();
 
     // Create an article content type.
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => t('Article')));
+    $this->drupalCreateContentType(['type' => 'article', 'name' => t('Article')]);
     // Create comment field on article so that adds 'comment_body' field.
     $this->addDefaultCommentField('node', 'article');
   }
@@ -43,7 +43,7 @@ function testCommentUninstallWithField() {
 
     // Uninstall the comment module which should trigger an exception.
     try {
-      $this->container->get('module_installer')->uninstall(array('comment'));
+      $this->container->get('module_installer')->uninstall(['comment']);
       $this->fail("Expected an exception when uninstall was attempted.");
     }
     catch (ModuleUninstallValidatorException $e) {
@@ -77,7 +77,7 @@ function testCommentUninstallWithoutField() {
     field_purge_batch(10);
     // Ensure that uninstallation succeeds even if the field has already been
     // deleted manually beforehand.
-    $this->container->get('module_installer')->uninstall(array('comment'));
+    $this->container->get('module_installer')->uninstall(['comment']);
   }
 
 }
diff --git a/core/modules/comment/src/Tests/Views/ArgumentUserUIDTest.php b/core/modules/comment/src/Tests/Views/ArgumentUserUIDTest.php
index 63a008277cfc319d3ac580f4349e5771a388ea9b..3365918ff9532f000af38ebcfb3af9914a8565c3 100644
--- a/core/modules/comment/src/Tests/Views/ArgumentUserUIDTest.php
+++ b/core/modules/comment/src/Tests/Views/ArgumentUserUIDTest.php
@@ -18,7 +18,7 @@ class ArgumentUserUIDTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_comment_user_uid');
+  public static $testViews = ['test_comment_user_uid'];
 
   function testCommentUserUIDTest() {
     // Add an additional comment which is not created by the user.
@@ -35,16 +35,16 @@ function testCommentUserUIDTest() {
     $comment->save();
 
     $view = Views::getView('test_comment_user_uid');
-    $this->executeView($view, array($this->account->id()));
-    $result_set = array(
-      array(
+    $this->executeView($view, [$this->account->id()]);
+    $result_set = [
+      [
         'nid' => $this->nodeUserPosted->id(),
-      ),
-      array(
+      ],
+      [
         'nid' => $this->nodeUserCommented->id(),
-      ),
-    );
-    $column_map = array('nid' => 'nid');
+      ],
+    ];
+    $column_map = ['nid' => 'nid'];
     $this->assertIdenticalResultset($view, $result_set, $column_map);
   }
 
diff --git a/core/modules/comment/src/Tests/Views/CommentFieldFilterTest.php b/core/modules/comment/src/Tests/Views/CommentFieldFilterTest.php
index c0cf374762b1d39ffc83a5f1aa923d26ce48e115..040fc7dadb1d9dc6734dc766e8f15e0bc9985e57 100644
--- a/core/modules/comment/src/Tests/Views/CommentFieldFilterTest.php
+++ b/core/modules/comment/src/Tests/Views/CommentFieldFilterTest.php
@@ -15,21 +15,21 @@ class CommentFieldFilterTest extends CommentTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_field_filters');
+  public static $testViews = ['test_field_filters'];
 
   /**
    * List of comment titles by language.
    *
    * @var array
    */
-  public $commentTitles = array();
+  public $commentTitles = [];
 
   function setUp() {
     parent::setUp();
@@ -40,15 +40,15 @@ function setUp() {
     ConfigurableLanguage::createFromLangcode('es')->save();
 
     // Set up comment titles.
-    $this->commentTitles = array(
+    $this->commentTitles = [
       'en' => 'Food in Paris',
       'es' => 'Comida en Paris',
       'fr' => 'Nouriture en Paris',
-    );
+    ];
 
     // Create a new comment. Using the one created earlier will not work,
     // as it predates the language set-up.
-    $comment = array(
+    $comment = [
       'uid' => $this->loggedInUser->id(),
       'entity_id' => $this->nodeUserCommented->id(),
       'entity_type' => 'node',
@@ -56,7 +56,7 @@ function setUp() {
       'cid' => '',
       'pid' => '',
       'node_type' => '',
-    );
+    ];
     $this->comment = Comment::create($comment);
 
     // Add field values and translate the comment.
@@ -64,8 +64,8 @@ function setUp() {
     $this->comment->comment_body->value = $this->commentTitles['en'];
     $this->comment->langcode = 'en';
     $this->comment->save();
-    foreach (array('es', 'fr') as $langcode) {
-      $translation = $this->comment->addTranslation($langcode, array());
+    foreach (['es', 'fr'] as $langcode) {
+      $translation = $this->comment->addTranslation($langcode, []);
       $translation->comment_body->value = $this->commentTitles[$langcode];
       $translation->subject->value = $this->commentTitles[$langcode];
     }
@@ -78,19 +78,19 @@ function setUp() {
   public function testFilters() {
     // Test the title filter page, which filters for title contains 'Comida'.
     // Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-title-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida title filter');
+    $this->assertPageCounts('test-title-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida title filter');
 
     // Test the body filter page, which filters for body contains 'Comida'.
     // Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-body-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida body filter');
+    $this->assertPageCounts('test-body-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida body filter');
 
     // Test the title Paris filter page, which filters for title contains
     // 'Paris'. Should show each translation once.
-    $this->assertPageCounts('test-title-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris title filter');
+    $this->assertPageCounts('test-title-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris title filter');
 
     // Test the body Paris filter page, which filters for body contains
     // 'Paris'. Should show each translation once.
-    $this->assertPageCounts('test-body-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris body filter');
+    $this->assertPageCounts('test-body-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris body filter');
   }
 
   /**
diff --git a/core/modules/comment/src/Tests/Views/CommentRestExportTest.php b/core/modules/comment/src/Tests/Views/CommentRestExportTest.php
index a3d7e2dcc2e327887f6885f8d72f8ffac60c5215..ed7ce55e355be0cf7b998ba8c2c7080be95ad8f5 100644
--- a/core/modules/comment/src/Tests/Views/CommentRestExportTest.php
+++ b/core/modules/comment/src/Tests/Views/CommentRestExportTest.php
@@ -27,7 +27,7 @@ class CommentRestExportTest extends CommentTestBase {
   protected function setUp() {
     parent::setUp();
     // Add another anonymous comment.
-    $comment = array(
+    $comment = [
       'uid' => 0,
       'entity_id' => $this->nodeUserCommented->id(),
       'entity_type' => 'node',
@@ -38,7 +38,7 @@ protected function setUp() {
       'mail' => 'someone@example.com',
       'name' => 'bobby tables',
       'hostname' => 'public.example.com',
-    );
+    ];
     $this->comment = Comment::create($comment);
     $this->comment->save();
 
diff --git a/core/modules/comment/src/Tests/Views/CommentRowTest.php b/core/modules/comment/src/Tests/Views/CommentRowTest.php
index e96869c0b27499370e67b12847301eab897e29c3..d73811e51e0909fff058e57f12d314488da925bb 100644
--- a/core/modules/comment/src/Tests/Views/CommentRowTest.php
+++ b/core/modules/comment/src/Tests/Views/CommentRowTest.php
@@ -14,7 +14,7 @@ class CommentRowTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_comment_row');
+  public static $testViews = ['test_comment_row'];
 
   /**
    * Test comment row.
diff --git a/core/modules/comment/src/Tests/Views/CommentTestBase.php b/core/modules/comment/src/Tests/Views/CommentTestBase.php
index d687488b53723c09b9e0337a2ecfc57e23e79b80..d7bec0481269cbc7aefbc50c0293299a86382678 100644
--- a/core/modules/comment/src/Tests/Views/CommentTestBase.php
+++ b/core/modules/comment/src/Tests/Views/CommentTestBase.php
@@ -19,7 +19,7 @@ abstract class CommentTestBase extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'comment', 'comment_test_views');
+  public static $modules = ['node', 'comment', 'comment_test_views'];
 
   /**
    * A normal user with permission to post comments (without approval).
@@ -59,21 +59,21 @@ abstract class CommentTestBase extends ViewTestBase {
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('comment_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['comment_test_views']);
 
     // Add two users, create a node with the user1 as author and another node
     // with user2 as author. For the second node add a comment from user1.
-    $this->account = $this->drupalCreateUser(array('skip comment approval'));
+    $this->account = $this->drupalCreateUser(['skip comment approval']);
     $this->account2 = $this->drupalCreateUser();
     $this->drupalLogin($this->account);
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => t('Basic page')));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => t('Basic page')]);
     $this->addDefaultCommentField('node', 'page');
 
     $this->nodeUserPosted = $this->drupalCreateNode();
-    $this->nodeUserCommented = $this->drupalCreateNode(array('uid' => $this->account2->id()));
+    $this->nodeUserCommented = $this->drupalCreateNode(['uid' => $this->account2->id()]);
 
-    $comment = array(
+    $comment = [
       'uid' => $this->loggedInUser->id(),
       'entity_id' => $this->nodeUserCommented->id(),
       'entity_type' => 'node',
@@ -82,7 +82,7 @@ protected function setUp() {
       'cid' => '',
       'pid' => '',
       'mail' => 'someone@example.com',
-    );
+    ];
     $this->comment = Comment::create($comment);
     $this->comment->save();
   }
diff --git a/core/modules/comment/src/Tests/Views/DefaultViewRecentCommentsTest.php b/core/modules/comment/src/Tests/Views/DefaultViewRecentCommentsTest.php
index ff151c68b6640705bf70c68c292524dd93834e38..3e5f26b0e84fece9e7d0e91885897c489aaa1e07 100644
--- a/core/modules/comment/src/Tests/Views/DefaultViewRecentCommentsTest.php
+++ b/core/modules/comment/src/Tests/Views/DefaultViewRecentCommentsTest.php
@@ -22,7 +22,7 @@ class DefaultViewRecentCommentsTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'comment', 'block');
+  public static $modules = ['node', 'comment', 'block'];
 
   /**
    * Number of results for the Master display.
@@ -50,7 +50,7 @@ class DefaultViewRecentCommentsTest extends ViewTestBase {
    *
    * @var array
    */
-  protected $commentsCreated = array();
+  protected $commentsCreated = [];
 
   /**
    * Contains the node object used for comments of this test.
@@ -66,9 +66,9 @@ protected function setUp() {
     $content_type = $this->drupalCreateContentType();
 
     // Add a node of the new content type.
-    $node_data = array(
+    $node_data = [
       'type' => $content_type->id(),
-    );
+    ];
 
     $this->addDefaultCommentField('node', $content_type->id());
     $this->node = $this->drupalCreateNode($node_data);
@@ -79,12 +79,12 @@ protected function setUp() {
     // Create some comments and attach them to the created node.
     for ($i = 0; $i < $this->masterDisplayResults; $i++) {
       /** @var \Drupal\comment\CommentInterface $comment */
-      $comment = Comment::create(array(
+      $comment = Comment::create([
         'status' => CommentInterface::PUBLISHED,
         'field_name' => 'comment',
         'entity_type' => 'node',
         'entity_id' => $this->node->id(),
-      ));
+      ]);
       $comment->setOwnerId(0);
       $comment->setSubject('Test comment ' . $i);
       $comment->comment_body->value = 'Test body ' . $i;
@@ -116,12 +116,12 @@ public function testBlockDisplay() {
     $view->setDisplay('block_1');
     $this->executeView($view);
 
-    $map = array(
+    $map = [
       'subject' => 'subject',
       'cid' => 'cid',
       'comment_field_data_created' => 'created'
-    );
-    $expected_result = array();
+    ];
+    $expected_result = [];
     foreach (array_values($this->commentsCreated) as $key => $comment) {
       $expected_result[$key]['subject'] = $comment->getSubject();
       $expected_result[$key]['cid'] = $comment->id();
@@ -132,7 +132,7 @@ public function testBlockDisplay() {
     // Check the number of results given by the display is the expected.
     $this->assertEqual(sizeof($view->result), $this->blockDisplayResults,
       format_string('There are exactly @results comments. Expected @expected',
-        array('@results' => count($view->result), '@expected' => $this->blockDisplayResults)
+        ['@results' => count($view->result), '@expected' => $this->blockDisplayResults]
       )
     );
   }
diff --git a/core/modules/comment/src/Tests/Views/FilterUserUIDTest.php b/core/modules/comment/src/Tests/Views/FilterUserUIDTest.php
index ee8281b50c40c939f0377edda1ff598261049f9a..c4570cee328857d5781faa05b1ff57f632ba1aa3 100644
--- a/core/modules/comment/src/Tests/Views/FilterUserUIDTest.php
+++ b/core/modules/comment/src/Tests/Views/FilterUserUIDTest.php
@@ -20,7 +20,7 @@ class FilterUserUIDTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_comment_user_uid');
+  public static $testViews = ['test_comment_user_uid'];
 
   function testCommentUserUIDTest() {
     $view = Views::getView('test_comment_user_uid');
@@ -40,23 +40,23 @@ function testCommentUserUIDTest() {
     ]);
     $comment->save();
 
-    $options = array(
+    $options = [
       'id' => 'uid_touch',
       'table' => 'node_field_data',
       'field' => 'uid_touch',
-      'value' => array($this->loggedInUser->id()),
-    );
+      'value' => [$this->loggedInUser->id()],
+    ];
     $view->addHandler('default', 'filter', 'node_field_data', 'uid_touch', $options);
-    $this->executeView($view, array($this->account->id()));
-    $result_set = array(
-      array(
+    $this->executeView($view, [$this->account->id()]);
+    $result_set = [
+      [
         'nid' => $this->nodeUserPosted->id(),
-      ),
-      array(
+      ],
+      [
         'nid' => $this->nodeUserCommented->id(),
-      ),
-    );
-    $column_map = array('nid' => 'nid');
+      ],
+    ];
+    $column_map = ['nid' => 'nid'];
     $this->assertIdenticalResultset($view, $result_set, $column_map);
   }
 
diff --git a/core/modules/comment/src/Tests/Views/RowRssTest.php b/core/modules/comment/src/Tests/Views/RowRssTest.php
index 85bd34fb687c0ef5fc17370070cccbb9decbf3e2..343b797cf5ccee1b2cd7c5f64e947c004577f30d 100644
--- a/core/modules/comment/src/Tests/Views/RowRssTest.php
+++ b/core/modules/comment/src/Tests/Views/RowRssTest.php
@@ -15,7 +15,7 @@ class RowRssTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_comment_rss');
+  public static $testViews = ['test_comment_rss'];
 
   /**
    * Test comment rss output.
diff --git a/core/modules/comment/src/Tests/Views/WizardTest.php b/core/modules/comment/src/Tests/Views/WizardTest.php
index 885ce2cf469cfb20709e1421bb23d7e4eac1dbb9..a7f14c82eaa7881afa76b23629c5122d88d84693 100644
--- a/core/modules/comment/src/Tests/Views/WizardTest.php
+++ b/core/modules/comment/src/Tests/Views/WizardTest.php
@@ -21,7 +21,7 @@ class WizardTest extends WizardTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'comment');
+  public static $modules = ['node', 'comment'];
 
 
   /**
@@ -29,7 +29,7 @@ class WizardTest extends WizardTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => t('Basic page')));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => t('Basic page')]);
     // Add comment field to page node type.
     $this->addDefaultCommentField('node', 'page');
   }
@@ -38,7 +38,7 @@ protected function setUp() {
    * Tests adding a view of comments.
    */
   public function testCommentWizard() {
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['show[wizard_key]'] = 'comment';
@@ -48,7 +48,7 @@ public function testCommentWizard() {
     // Just triggering the saving should automatically choose a proper row
     // plugin.
     $this->drupalPostForm('admin/structure/views/add', $view, t('Save and edit'));
-    $this->assertUrl('admin/structure/views/view/' . $view['id'], array(), 'Make sure the view saving was successful and the browser got redirected to the edit page.');
+    $this->assertUrl('admin/structure/views/view/' . $view['id'], [], 'Make sure the view saving was successful and the browser got redirected to the edit page.');
 
     // If we update the type first we should get a selection of comment valid
     // row plugins as the select field.
@@ -59,19 +59,19 @@ public function testCommentWizard() {
     // Check for available options of the row plugin.
     $xpath = $this->constructFieldXpath('name', 'page[style][row_plugin]');
     $fields = $this->xpath($xpath);
-    $options = array();
+    $options = [];
     foreach ($fields as $field) {
       $items = $this->getAllOptions($field);
       foreach ($items as $item) {
         $options[] = $item->attributes()->value;
       }
     }
-    $expected_options = array('entity:comment', 'fields');
+    $expected_options = ['entity:comment', 'fields'];
     $this->assertEqual($options, $expected_options);
 
     $view['id'] = strtolower($this->randomMachineName(16));
     $this->drupalPostForm(NULL, $view, t('Save and edit'));
-    $this->assertUrl('admin/structure/views/view/' . $view['id'], array(), 'Make sure the view saving was successful and the browser got redirected to the edit page.');
+    $this->assertUrl('admin/structure/views/view/' . $view['id'], [], 'Make sure the view saving was successful and the browser got redirected to the edit page.');
 
     $user = $this->drupalCreateUser(['access comments']);
     $this->drupalLogin($user);
diff --git a/core/modules/comment/tests/modules/comment_test/comment_test.module b/core/modules/comment/tests/modules/comment_test/comment_test.module
index d54814ba1c428c7015720c6c6648c03cd833c5c9..b1cca02f25d9936f17a4fdf67fd172334fdf478e 100644
--- a/core/modules/comment/tests/modules/comment_test/comment_test.module
+++ b/core/modules/comment/tests/modules/comment_test/comment_test.module
@@ -31,14 +31,14 @@ function comment_test_comment_links_alter(array &$links, CommentInterface &$enti
     return;
   }
 
-  $links['comment_test'] = array(
+  $links['comment_test'] = [
     '#theme' => 'links__comment__comment_test',
-    '#attributes' => array('class' => array('links', 'inline')),
-    '#links' => array(
-      'comment-report' => array(
+    '#attributes' => ['class' => ['links', 'inline']],
+    '#links' => [
+      'comment-report' => [
         'title' => t('Report'),
         'url' => Url::fromRoute('comment_test.report', ['comment' => $entity->id()], ['query' => ['token' => \Drupal::getContainer()->get('csrf_token')->get("comment/{$entity->id()}/report")]]),
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
diff --git a/core/modules/comment/tests/src/Kernel/CommentDefaultFormatterCacheTagsTest.php b/core/modules/comment/tests/src/Kernel/CommentDefaultFormatterCacheTagsTest.php
index a95088e94174fed8d13cf61916b9b2956c8fcae2..bdea71df15fa1a1692b0079cf0247ddf326bccc8 100644
--- a/core/modules/comment/tests/src/Kernel/CommentDefaultFormatterCacheTagsTest.php
+++ b/core/modules/comment/tests/src/Kernel/CommentDefaultFormatterCacheTagsTest.php
@@ -26,7 +26,7 @@ class CommentDefaultFormatterCacheTagsTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'comment');
+  public static $modules = ['entity_test', 'comment'];
 
   /**
    * {@inheritdoc}
@@ -48,11 +48,11 @@ protected function setUp() {
     // user does not have access to the 'administer comments' permission, to
     // ensure only published comments are visible to the end user.
     $current_user = $this->container->get('current_user');
-    $current_user->setAccount($this->createUser(array(), array('access comments')));
+    $current_user->setAccount($this->createUser([], ['access comments']));
 
     // Install tables and config needed to render comments.
-    $this->installSchema('comment', array('comment_entity_statistics'));
-    $this->installConfig(array('system', 'filter', 'comment'));
+    $this->installSchema('comment', ['comment_entity_statistics']);
+    $this->installConfig(['system', 'filter', 'comment']);
 
     // Comment rendering generates links, so build the router.
     $this->container->get('router.builder')->rebuild();
@@ -70,7 +70,7 @@ public function testCacheTags() {
     $renderer = $this->container->get('renderer');
 
     // Create the entity that will be commented upon.
-    $commented_entity = EntityTest::create(array('name' => $this->randomMachineName()));
+    $commented_entity = EntityTest::create(['name' => $this->randomMachineName()]);
     $commented_entity->save();
 
     // Verify cache tags on the rendered entity before it has comments.
@@ -94,19 +94,19 @@ public function testCacheTags() {
     // also exists in the {users} table.
     $user = $this->createUser();
     $user->save();
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'subject' => 'Llama',
-      'comment_body' => array(
+      'comment_body' => [
         'value' => 'Llamas are cool!',
         'format' => 'plain_text',
-      ),
+      ],
       'entity_id' => $commented_entity->id(),
       'entity_type' => 'entity_test',
       'field_name' => 'comment',
       'comment_type' => 'comment',
       'status' => CommentInterface::PUBLISHED,
       'uid' => $user->id(),
-    ));
+    ]);
     $comment->save();
 
     // Load commented entity so comment_count gets computed.
diff --git a/core/modules/comment/tests/src/Kernel/CommentFieldAccessTest.php b/core/modules/comment/tests/src/Kernel/CommentFieldAccessTest.php
index 674c7f3e331671ac8edecfcbe81dbb89ef83e9fb..5046353302e89d93b23138a36fbc45ea0b08cd95 100644
--- a/core/modules/comment/tests/src/Kernel/CommentFieldAccessTest.php
+++ b/core/modules/comment/tests/src/Kernel/CommentFieldAccessTest.php
@@ -29,30 +29,30 @@ class CommentFieldAccessTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('comment', 'entity_test', 'user');
+  public static $modules = ['comment', 'entity_test', 'user'];
 
   /**
    * Fields that only users with administer comments permissions can change.
    *
    * @var array
    */
-  protected $administrativeFields = array(
+  protected $administrativeFields = [
     'uid',
     'status',
     'created',
-  );
+  ];
 
   /**
    * These fields are automatically managed and can not be changed by any user.
    *
    * @var array
    */
-  protected $readOnlyFields = array(
+  protected $readOnlyFields = [
     'changed',
     'hostname',
     'cid',
     'thread',
-  );
+  ];
 
   /**
    * These fields can be edited on create only.
@@ -73,19 +73,19 @@ class CommentFieldAccessTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  protected $contactFields = array(
+  protected $contactFields = [
     'name',
     'mail',
     'homepage',
-  );
+  ];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('user', 'comment'));
-    $this->installSchema('comment', array('comment_entity_statistics'));
+    $this->installConfig(['user', 'comment']);
+    $this->installSchema('comment', ['comment_entity_statistics']);
   }
 
   /**
diff --git a/core/modules/comment/tests/src/Kernel/CommentStringIdEntitiesTest.php b/core/modules/comment/tests/src/Kernel/CommentStringIdEntitiesTest.php
index ed56cc9aedfc5470e5b8627064597ff831331d8a..adbe1b08d5ec070b8b19e10f9290419a926408d9 100644
--- a/core/modules/comment/tests/src/Kernel/CommentStringIdEntitiesTest.php
+++ b/core/modules/comment/tests/src/Kernel/CommentStringIdEntitiesTest.php
@@ -18,21 +18,21 @@ class CommentStringIdEntitiesTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'comment',
     'user',
     'field',
     'field_ui',
     'entity_test',
     'text',
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
     $this->installEntitySchema('comment');
-    $this->installSchema('comment', array('comment_entity_statistics'));
+    $this->installSchema('comment', ['comment_entity_statistics']);
     // Create the comment body field storage.
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
   }
 
   /**
@@ -40,21 +40,21 @@ protected function setUp() {
    */
   public function testCommentFieldNonStringId() {
     try {
-      $bundle = CommentType::create(array(
+      $bundle = CommentType::create([
         'id' => 'foo',
         'label' => 'foo',
         'description' => '',
         'target_entity_type_id' => 'entity_test_string_id',
-      ));
+      ]);
       $bundle->save();
-      $field_storage = FieldStorageConfig::create(array(
+      $field_storage = FieldStorageConfig::create([
         'field_name' => 'foo',
         'entity_type' => 'entity_test_string_id',
-        'settings' => array(
+        'settings' => [
           'comment_type' => 'entity_test_string_id',
-        ),
+        ],
         'type' => 'comment',
-      ));
+      ]);
       $field_storage->save();
       $this->fail('Did not throw an exception as expected.');
     }
diff --git a/core/modules/comment/tests/src/Kernel/CommentValidationTest.php b/core/modules/comment/tests/src/Kernel/CommentValidationTest.php
index eb37006ac47d8704e6bfda0d1dd92aa9011c24d6..98b771513b97d609f8c3366ce2c5e66ce1437685 100644
--- a/core/modules/comment/tests/src/Kernel/CommentValidationTest.php
+++ b/core/modules/comment/tests/src/Kernel/CommentValidationTest.php
@@ -19,14 +19,14 @@ class CommentValidationTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('comment', 'node');
+  public static $modules = ['comment', 'node'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('comment', array('comment_entity_statistics'));
+    $this->installSchema('comment', ['comment_entity_statistics']);
   }
 
   /**
@@ -34,54 +34,54 @@ protected function setUp() {
    */
   public function testValidation() {
     // Add a user.
-    $user = User::create(array('name' => 'test', 'status' => TRUE));
+    $user = User::create(['name' => 'test', 'status' => TRUE]);
     $user->save();
 
     // Add comment type.
-    $this->entityManager->getStorage('comment_type')->create(array(
+    $this->entityManager->getStorage('comment_type')->create([
       'id' => 'comment',
       'label' => 'comment',
       'target_entity_type_id' => 'node',
-    ))->save();
+    ])->save();
 
     // Add comment field to content.
-    $this->entityManager->getStorage('field_storage_config')->create(array(
+    $this->entityManager->getStorage('field_storage_config')->create([
       'entity_type' => 'node',
       'field_name' => 'comment',
       'type' => 'comment',
-      'settings' => array(
+      'settings' => [
         'comment_type' => 'comment',
-      )
-    ))->save();
+      ]
+    ])->save();
 
     // Create a page node type.
-    $this->entityManager->getStorage('node_type')->create(array(
+    $this->entityManager->getStorage('node_type')->create([
       'type' => 'page',
       'name' => 'page',
-    ))->save();
+    ])->save();
 
     // Add comment field to page content.
     /** @var \Drupal\field\FieldConfigInterface $field */
-    $field = $this->entityManager->getStorage('field_config')->create(array(
+    $field = $this->entityManager->getStorage('field_config')->create([
       'field_name' => 'comment',
       'entity_type' => 'node',
       'bundle' => 'page',
       'label' => 'Comment settings',
-    ));
+    ]);
     $field->save();
 
-    $node = $this->entityManager->getStorage('node')->create(array(
+    $node = $this->entityManager->getStorage('node')->create([
       'type' => 'page',
       'title' => 'test',
-    ));
+    ]);
     $node->save();
 
-    $comment = $this->entityManager->getStorage('comment')->create(array(
+    $comment = $this->entityManager->getStorage('comment')->create([
       'entity_id' => $node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment',
       'comment_body' => $this->randomMachineName(),
-    ));
+    ]);
 
     $violations = $comment->validate();
     $this->assertEqual(count($violations), 0, 'No violations when validating a default comment.');
@@ -101,7 +101,7 @@ public function testValidation() {
     $violations = $comment->validate();
     $this->assertEqual(count($violations), 1, "Violation found on author name collision");
     $this->assertEqual($violations[0]->getPropertyPath(), "name");
-    $this->assertEqual($violations[0]->getMessage(), t('The name you used (%name) belongs to a registered user.', array('%name' => 'test')));
+    $this->assertEqual($violations[0]->getMessage(), t('The name you used (%name) belongs to a registered user.', ['%name' => 'test']));
 
     // Make the name valid.
     $comment->set('name', 'valid unused name');
@@ -141,39 +141,39 @@ public function testValidation() {
     \Drupal::entityManager()->getStorage('node')->resetCache([$node->id()]);
     $node = Node::load($node->id());
     // Create a new comment with the new field.
-    $comment = $this->entityManager->getStorage('comment')->create(array(
+    $comment = $this->entityManager->getStorage('comment')->create([
       'entity_id' => $node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment',
       'comment_body' => $this->randomMachineName(),
       'uid' => 0,
       'name' => '',
-    ));
+    ]);
     $violations = $comment->validate();
     $this->assertEqual(count($violations), 1, 'Violation found when name is required, but empty and UID is anonymous.');
     $this->assertEqual($violations[0]->getPropertyPath(), 'name');
     $this->assertEqual($violations[0]->getMessage(), t('You have to specify a valid author.'));
 
     // Test creating a default comment with a given user id works.
-    $comment = $this->entityManager->getStorage('comment')->create(array(
+    $comment = $this->entityManager->getStorage('comment')->create([
       'entity_id' => $node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment',
       'comment_body' => $this->randomMachineName(),
       'uid' => $user->id(),
-    ));
+    ]);
     $violations = $comment->validate();
     $this->assertEqual(count($violations), 0, 'No violations when validating a default comment with an author.');
 
     // Test specifying a wrong author name does not work.
-    $comment = $this->entityManager->getStorage('comment')->create(array(
+    $comment = $this->entityManager->getStorage('comment')->create([
       'entity_id' => $node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment',
       'comment_body' => $this->randomMachineName(),
       'uid' => $user->id(),
       'name' => 'not-test',
-    ));
+    ]);
     $violations = $comment->validate();
     $this->assertEqual(count($violations), 1, 'Violation found when author name and comment author do not match.');
     $this->assertEqual($violations[0]->getPropertyPath(), 'name');
@@ -195,7 +195,7 @@ protected function assertLengthViolation(CommentInterface $comment, $field_name,
     $this->assertEqual(count($violations), 1, "Violation found when $field_name is too long.");
     $this->assertEqual($violations[0]->getPropertyPath(), "$field_name.0.value");
     $field_label = $comment->get($field_name)->getFieldDefinition()->getLabel();
-    $this->assertEqual($violations[0]->getMessage(), t('%name: may not be longer than @max characters.', array('%name' => $field_label, '@max' => $length)));
+    $this->assertEqual($violations[0]->getMessage(), t('%name: may not be longer than @max characters.', ['%name' => $field_label, '@max' => $length]));
   }
 
 }
diff --git a/core/modules/comment/tests/src/Kernel/Migrate/MigrateCommentStubTest.php b/core/modules/comment/tests/src/Kernel/Migrate/MigrateCommentStubTest.php
index b5fc4fe34a43acde872cd90dd7842db71a6b15f9..0b256ea51a2dfc039cf19840b98862cfd835f31b 100644
--- a/core/modules/comment/tests/src/Kernel/Migrate/MigrateCommentStubTest.php
+++ b/core/modules/comment/tests/src/Kernel/Migrate/MigrateCommentStubTest.php
@@ -33,11 +33,11 @@ protected function setUp() {
     $storage = \Drupal::entityManager()->getStorage('user');
     // Insert a row for the anonymous user.
     $storage
-      ->create(array(
+      ->create([
         'uid' => 0,
         'status' => 0,
         'name' => '',
-      ))
+      ])
       ->save();
     // Need at least one node type and comment type present.
     NodeType::create([
diff --git a/core/modules/comment/tests/src/Kernel/Migrate/d7/MigrateCommentTest.php b/core/modules/comment/tests/src/Kernel/Migrate/d7/MigrateCommentTest.php
index 4d4df032e4a26a19d82d1fff4810b488e1d9475b..f1e094f39b81a30eda594f4cb57ce8ba7e15c2a7 100644
--- a/core/modules/comment/tests/src/Kernel/Migrate/d7/MigrateCommentTest.php
+++ b/core/modules/comment/tests/src/Kernel/Migrate/d7/MigrateCommentTest.php
@@ -34,11 +34,11 @@ protected function setUp() {
     $this->executeMigration('d7_node_type');
     // We only need the test_content_type node migration to run for real, so
     // mock all the others.
-    $this->prepareMigrations(array(
-      'd7_node' => array(
-        array(array(0), array(0)),
-      ),
-    ));
+    $this->prepareMigrations([
+      'd7_node' => [
+        [[0], [0]],
+      ],
+    ]);
     $this->executeMigrations([
       'd7_node',
       'd7_comment_type',
diff --git a/core/modules/comment/tests/src/Kernel/Views/CommentUserNameTest.php b/core/modules/comment/tests/src/Kernel/Views/CommentUserNameTest.php
index dae2c480cffb8c90bf18c625eddb40e8d7d14b14..cad7b2b9815e800eec3f46bbfc2845246e7c0306 100644
--- a/core/modules/comment/tests/src/Kernel/Views/CommentUserNameTest.php
+++ b/core/modules/comment/tests/src/Kernel/Views/CommentUserNameTest.php
@@ -43,11 +43,11 @@ protected function setUp($import_test_views = TRUE) {
     $storage = \Drupal::entityManager()->getStorage('user');
     // Insert a row for the anonymous user.
     $storage
-      ->create(array(
+      ->create([
         'uid' => 0,
         'name' => '',
         'status' => 0,
-      ))
+      ])
       ->save();
 
     $admin_role = Role::create([
diff --git a/core/modules/comment/tests/src/Unit/CommentLinkBuilderTest.php b/core/modules/comment/tests/src/Unit/CommentLinkBuilderTest.php
index 61e93a11271af04871f0b53a83b381815bb00bb8..18da223d9a19cbaf8dcd08c13a61ddb1bad2cd68 100644
--- a/core/modules/comment/tests/src/Unit/CommentLinkBuilderTest.php
+++ b/core/modules/comment/tests/src/Unit/CommentLinkBuilderTest.php
@@ -75,9 +75,9 @@ protected function setUp() {
     $this->commentManager->expects($this->any())
       ->method('getFields')
       ->with('node')
-      ->willReturn(array(
-        'comment' => array(),
-      ));
+      ->willReturn([
+        'comment' => [],
+      ]);
     $this->commentManager->expects($this->any())
       ->method('forbiddenMessage')
       ->willReturn("Can't let you do that Dave.");
@@ -116,10 +116,10 @@ public function testCommentLinkBuilder(NodeInterface $node, $context, $has_acces
       ->willReturn($history_exists);
     $this->currentUser->expects($this->any())
       ->method('hasPermission')
-      ->willReturnMap(array(
-        array('access comments', $has_access_comments),
-        array('post comments', $has_post_comments),
-      ));
+      ->willReturnMap([
+        ['access comments', $has_access_comments],
+        ['post comments', $has_post_comments],
+      ]);
     $this->currentUser->expects($this->any())
       ->method('isAuthenticated')
       ->willReturn(!$is_anonymous);
@@ -155,57 +155,57 @@ public function testCommentLinkBuilder(NodeInterface $node, $context, $has_acces
    * Data provider for ::testCommentLinkBuilder.
    */
   public function getLinkCombinations() {
-    $cases = array();
+    $cases = [];
     // No links should be created if the entity doesn't have the field.
-    $cases[] = array(
+    $cases[] = [
       $this->getMockNode(FALSE, CommentItemInterface::OPEN, CommentItemInterface::FORM_BELOW, 1),
-      array('view_mode' => 'teaser'),
+      ['view_mode' => 'teaser'],
       TRUE,
       TRUE,
       TRUE,
       TRUE,
-      array(),
-    );
-    foreach (array('search_result', 'search_index', 'print') as $view_mode) {
+      [],
+    ];
+    foreach (['search_result', 'search_index', 'print'] as $view_mode) {
       // Nothing should be output in these view modes.
-      $cases[] = array(
+      $cases[] = [
         $this->getMockNode(TRUE, CommentItemInterface::OPEN, CommentItemInterface::FORM_BELOW, 1),
-        array('view_mode' => $view_mode),
+        ['view_mode' => $view_mode],
         TRUE,
         TRUE,
         TRUE,
         TRUE,
-        array(),
-      );
+        [],
+      ];
     }
     // All other combinations.
-    $combinations = array(
-      'is_anonymous' => array(FALSE, TRUE),
-      'comment_count' => array(0, 1),
-      'has_access_comments' => array(0, 1),
-      'history_exists' => array(FALSE, TRUE),
-      'has_post_comments'   => array(0, 1),
-      'form_location'            => array(CommentItemInterface::FORM_BELOW, CommentItemInterface::FORM_SEPARATE_PAGE),
-      'comments'        => array(
+    $combinations = [
+      'is_anonymous' => [FALSE, TRUE],
+      'comment_count' => [0, 1],
+      'has_access_comments' => [0, 1],
+      'history_exists' => [FALSE, TRUE],
+      'has_post_comments'   => [0, 1],
+      'form_location'            => [CommentItemInterface::FORM_BELOW, CommentItemInterface::FORM_SEPARATE_PAGE],
+      'comments'        => [
         CommentItemInterface::OPEN,
         CommentItemInterface::CLOSED,
         CommentItemInterface::HIDDEN,
-      ),
-      'view_mode' => array(
+      ],
+      'view_mode' => [
         'teaser', 'rss', 'full',
-      ),
-    );
+      ],
+    ];
     $permutations = TestBase::generatePermutations($combinations);
     foreach ($permutations as $combination) {
-      $case = array(
+      $case = [
         $this->getMockNode(TRUE, $combination['comments'], $combination['form_location'], $combination['comment_count']),
-        array('view_mode' => $combination['view_mode']),
+        ['view_mode' => $combination['view_mode']],
         $combination['has_access_comments'],
         $combination['history_exists'],
         $combination['has_post_comments'],
         $combination['is_anonymous'],
-      );
-      $expected = array();
+      ];
+      $expected = [];
       // When comments are enabled in teaser mode, and comments exist, and the
       // user has access - we can output the comment count.
       if ($combination['comments'] && $combination['view_mode'] == 'teaser' && $combination['comment_count'] && $combination['has_access_comments']) {
@@ -225,7 +225,7 @@ public function getLinkCombinations() {
             // comments exist or the form is on a separate page.
             if ($combination['view_mode'] == 'teaser' || ($combination['has_access_comments'] && $combination['comment_count']) || $combination['form_location'] == CommentItemInterface::FORM_SEPARATE_PAGE) {
               // There should be a add comment link.
-              $expected['comment-add'] = array('title' => 'Add new comment');
+              $expected['comment-add'] = ['title' => 'Add new comment'];
               if ($combination['form_location'] == CommentItemInterface::FORM_BELOW) {
                 // On the same page.
                 $expected['comment-add']['url'] = Url::fromRoute('node.view');
@@ -274,11 +274,11 @@ protected function getMockNode($has_field, $comment_status, $form_location, $com
     if (empty($this->timestamp)) {
       $this->timestamp = time();
     }
-    $field_item = (object) array(
+    $field_item = (object) [
       'status' => $comment_status,
       'comment_count' => $comment_count,
       'last_comment_timestamp' => $this->timestamp,
-    );
+    ];
     $node->expects($this->any())
       ->method('get')
       ->with('comment')
@@ -312,7 +312,7 @@ protected function getMockNode($has_field, $comment_status, $form_location, $com
       ->willReturn($url);
     $node->expects($this->any())
       ->method('url')
-      ->willReturn(array('route_name' => 'node.view'));
+      ->willReturn(['route_name' => 'node.view']);
 
     return $node;
   }
diff --git a/core/modules/comment/tests/src/Unit/CommentManagerTest.php b/core/modules/comment/tests/src/Unit/CommentManagerTest.php
index 78f14bbb1bbf60bc47762607ce152ea9b4b91496..3a6e20124bfbf18d1fa74958e446e2b8936fee50 100644
--- a/core/modules/comment/tests/src/Unit/CommentManagerTest.php
+++ b/core/modules/comment/tests/src/Unit/CommentManagerTest.php
@@ -32,13 +32,13 @@ public function testGetFields() {
 
     $entity_manager->expects($this->once())
       ->method('getFieldMapByFieldType')
-      ->will($this->returnValue(array(
-        'node' => array(
-          'field_foobar' => array(
+      ->will($this->returnValue([
+        'node' => [
+          'field_foobar' => [
             'type' => 'comment',
-          ),
-        ),
-      )));
+          ],
+        ],
+      ]));
 
     $entity_manager->expects($this->any())
       ->method('getDefinition')
diff --git a/core/modules/comment/tests/src/Unit/CommentStatisticsUnitTest.php b/core/modules/comment/tests/src/Unit/CommentStatisticsUnitTest.php
index 39b4cf0a07d816d12fd8f402f28e1c715fae561e..2a6d37930870ea358dd2f905a061f65f6d7a1ba3 100644
--- a/core/modules/comment/tests/src/Unit/CommentStatisticsUnitTest.php
+++ b/core/modules/comment/tests/src/Unit/CommentStatisticsUnitTest.php
@@ -56,7 +56,7 @@ protected function setUp() {
 
     $this->statement->expects($this->any())
       ->method('fetchObject')
-      ->will($this->returnCallback(array($this, 'fetchObjectCallback')));
+      ->will($this->returnCallback([$this, 'fetchObjectCallback']));
 
     $this->select = $this->getMockBuilder('Drupal\Core\Database\Query\Select')
       ->disableOriginalConstructor()
@@ -95,8 +95,8 @@ protected function setUp() {
    */
   public function testRead() {
     $this->calls_to_fetch = 0;
-    $results = $this->commentStatistics->read(array('1' => 'boo', '2' => 'foo'), 'snafoos');
-    $this->assertEquals($results, array('something', 'something-else'));
+    $results = $this->commentStatistics->read(['1' => 'boo', '2' => 'foo'], 'snafoos');
+    $this->assertEquals($results, ['something', 'something-else']);
   }
 
   /**
diff --git a/core/modules/comment/tests/src/Unit/Entity/CommentLockTest.php b/core/modules/comment/tests/src/Unit/Entity/CommentLockTest.php
index 97c109f0ed2f12ecc1351ab31af33058c56a38bf..e724dc6b89c5c14c4a9b8e415ae65cb64daa6cd5 100644
--- a/core/modules/comment/tests/src/Unit/Entity/CommentLockTest.php
+++ b/core/modules/comment/tests/src/Unit/Entity/CommentLockTest.php
@@ -26,7 +26,7 @@ public function testLocks() {
     $request_stack = new RequestStack();
     $request_stack->push(Request::create('/'));
     $container->set('request_stack', $request_stack);
-    $container->setParameter('cache_bins', array('cache.test' => 'test'));
+    $container->setParameter('cache_bins', ['cache.test' => 'test']);
     $lock = $this->getMock('Drupal\Core\Lock\LockBackendInterface');
     $cid = 2;
     $lock_name = "comment:$cid:.00/";
@@ -84,7 +84,7 @@ public function testLocks() {
     $comment->expects($this->at(1))
       ->method('get')
       ->with('status')
-      ->will($this->returnValue((object) array('value' => NULL)));
+      ->will($this->returnValue((object) ['value' => NULL]));
     $storage = $this->getMock('Drupal\comment\CommentStorageInterface');
 
     // preSave() should acquire the lock. (This is what's really being tested.)
diff --git a/core/modules/comment/tests/src/Unit/Migrate/d6/CommentTestBase.php b/core/modules/comment/tests/src/Unit/Migrate/d6/CommentTestBase.php
index 79bae3e3a16256b876ae2c5fc3ab84f40cc357cb..220328be00517d0059b439b23cfa6ba58c080381 100644
--- a/core/modules/comment/tests/src/Unit/Migrate/d6/CommentTestBase.php
+++ b/core/modules/comment/tests/src/Unit/Migrate/d6/CommentTestBase.php
@@ -14,20 +14,20 @@ abstract class CommentTestBase extends MigrateSqlSourceTestCase {
   const PLUGIN_CLASS = 'Drupal\comment\Plugin\migrate\source\d6\Comment';
 
   // The fake Migration configuration entity.
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     // The ID of the entity, can be any string.
     'id' => 'test',
     // This needs to be the identifier of the actual key: cid for comment, nid
     // for node and so on.
-    'source' => array(
+    'source' => [
       'plugin' => 'd6_comment',
-    ),
-  );
+    ],
+  ];
 
   // We need to set up the database contents; it's easier to do that below.
 
-  protected $expectedResults = array(
-    array(
+  protected $expectedResults = [
+    [
       'cid' => 1,
       'pid' => 0,
       'nid' => 2,
@@ -43,8 +43,8 @@ abstract class CommentTestBase extends MigrateSqlSourceTestCase {
       'homepage' => '',
       'format' => 'testformat1',
       'type' => 'story',
-    ),
-    array(
+    ],
+    [
       'cid' => 2,
       'pid' => 1,
       'nid' => 3,
@@ -60,8 +60,8 @@ abstract class CommentTestBase extends MigrateSqlSourceTestCase {
       'homepage' => '',
       'format' => 'testformat2',
       'type' => 'page',
-    ),
-  );
+    ],
+  ];
 
   /**
    * {@inheritdoc}
@@ -72,8 +72,8 @@ protected function setUp() {
       $this->databaseContents['comments'][$k]['status'] = 1 - $this->databaseContents['comments'][$k]['status'];
     }
     // Add node table data.
-    $this->databaseContents['node'][] = array('nid' => 2, 'type' => 'story');
-    $this->databaseContents['node'][] = array('nid' => 3, 'type' => 'page');
+    $this->databaseContents['node'][] = ['nid' => 2, 'type' => 'story'];
+    $this->databaseContents['node'][] = ['nid' => 3, 'type' => 'page'];
     parent::setUp();
   }
 
diff --git a/core/modules/comment/tests/src/Unit/Migrate/d6/CommentVariablePerCommentTypeTest.php b/core/modules/comment/tests/src/Unit/Migrate/d6/CommentVariablePerCommentTypeTest.php
index 75d0932a998aceb2301919af5afee7c75715a017..892319a18eda1f6b36fea2192ead570014dc3ea7 100644
--- a/core/modules/comment/tests/src/Unit/Migrate/d6/CommentVariablePerCommentTypeTest.php
+++ b/core/modules/comment/tests/src/Unit/Migrate/d6/CommentVariablePerCommentTypeTest.php
@@ -13,46 +13,46 @@ class CommentVariablePerCommentTypeTest extends MigrateSqlSourceTestCase {
 
   const PLUGIN_CLASS = CommentVariablePerCommentType::class;
 
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-    'source' => array(
+    'source' => [
       'plugin' => 'd6_comment_variable_per_comment_type',
-    ),
-  );
+    ],
+  ];
 
-  protected $expectedResults = array(
+  protected $expectedResults = [
     // Each result will also include a label and description, but those are
     // static values set by the source plugin and don't need to be asserted.
-    array(
+    [
       'comment_type' => 'comment',
-    ),
-    array(
+    ],
+    [
       'comment_type' => 'comment_no_subject',
-    ),
-  );
+    ],
+  ];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->databaseContents['node_type'] = array(
-      array(
+    $this->databaseContents['node_type'] = [
+      [
         'type' => 'page',
-      ),
-      array(
+      ],
+      [
         'type' => 'story',
-      ),
-    );
-    $this->databaseContents['variable'] = array(
-      array(
+      ],
+    ];
+    $this->databaseContents['variable'] = [
+      [
         'name' => 'comment_subject_field_page',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_subject_field_story',
         'value' => serialize(0),
-      ),
-    );
+      ],
+    ];
     parent::setUp();
   }
 
diff --git a/core/modules/comment/tests/src/Unit/Migrate/d6/CommentVariableTest.php b/core/modules/comment/tests/src/Unit/Migrate/d6/CommentVariableTest.php
index 6d25a2bd3e4270ead4a0caa1dc47b7fa9b29277a..406cd11f6f2bd763795937aad7347d6b0f462de9 100644
--- a/core/modules/comment/tests/src/Unit/Migrate/d6/CommentVariableTest.php
+++ b/core/modules/comment/tests/src/Unit/Migrate/d6/CommentVariableTest.php
@@ -13,15 +13,15 @@ class CommentVariableTest extends MigrateSqlSourceTestCase {
 
   const PLUGIN_CLASS = CommentVariable::class;
 
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-    'source' => array(
+    'source' => [
       'plugin' => 'd6_comment_variable',
-    ),
-  );
+    ],
+  ];
 
-  protected $expectedResults = array(
-    array(
+  protected $expectedResults = [
+    [
       'comment' => '1',
       'comment_default_mode' => '1',
       'comment_default_order' => '1',
@@ -33,56 +33,56 @@ class CommentVariableTest extends MigrateSqlSourceTestCase {
       'comment_form_location' => '1',
       'node_type' => 'page',
       'comment_type' => 'comment',
-    ),
-  );
+    ],
+  ];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->databaseContents['node_type'] = array(
-      array(
+    $this->databaseContents['node_type'] = [
+      [
         'type' => 'page',
-      ),
-    );
-    $this->databaseContents['variable'] = array(
-      array(
+      ],
+    ];
+    $this->databaseContents['variable'] = [
+      [
         'name' => 'comment_page',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_default_mode_page',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_default_order_page',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_default_per_page_page',
         'value' => serialize(50),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_controls_page',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_anonymous_page',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_subject_field_page',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_preview_page',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_form_location_page',
         'value' => serialize(1),
-      ),
-    );
+      ],
+    ];
     parent::setUp();
   }
 
diff --git a/core/modules/comment/tests/src/Unit/Migrate/d7/CommentTest.php b/core/modules/comment/tests/src/Unit/Migrate/d7/CommentTest.php
index 7793348690f3b6e756c23f7c392c1840658a3e6e..aed2f285504abd3956b4ae5cea4e445b29388dc5 100644
--- a/core/modules/comment/tests/src/Unit/Migrate/d7/CommentTest.php
+++ b/core/modules/comment/tests/src/Unit/Migrate/d7/CommentTest.php
@@ -13,15 +13,15 @@ class CommentTest extends MigrateSqlSourceTestCase {
 
   const PLUGIN_CLASS = 'Drupal\comment\Plugin\migrate\source\d7\Comment';
 
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-    'source' => array(
+    'source' => [
       'plugin' => 'd7_comment',
-    ),
-  );
+    ],
+  ];
 
-  protected $expectedResults = array(
-    array(
+  protected $expectedResults = [
+    [
       'cid' => '1',
       'pid' => '0',
       'nid' => '1',
@@ -36,14 +36,14 @@ class CommentTest extends MigrateSqlSourceTestCase {
       'mail' => '',
       'homepage' => '',
       'language' => 'und',
-      'comment_body' => array(
-        array(
+      'comment_body' => [
+        [
           'value' => 'This is a comment',
           'format' => 'filtered_html',
-        ),
-      ),
-    ),
-  );
+        ],
+      ],
+    ],
+  ];
 
   /**
    * {@inheritdoc}
@@ -52,8 +52,8 @@ protected function setUp() {
     $this->databaseContents['comment'] = $this->expectedResults;
     unset($this->databaseContents['comment'][0]['comment_body']);
 
-    $this->databaseContents['node'] = array(
-      array(
+    $this->databaseContents['node'] = [
+      [
         'nid' => '1',
         'vid' => '1',
         'type' => 'test_content_type',
@@ -68,10 +68,10 @@ protected function setUp() {
         'sticky' => '0',
         'tnid' => '0',
         'translate' => '0',
-      ),
-    );
-    $this->databaseContents['field_config_instance'] = array(
-      array(
+      ],
+    ];
+    $this->databaseContents['field_config_instance'] = [
+      [
         'id' => '14',
         'field_id' => '1',
         'field_name' => 'comment_body',
@@ -79,10 +79,10 @@ protected function setUp() {
         'bundle' => 'comment_node_test_content_type',
         'data' => 'a:0:{}',
         'deleted' => '0',
-      ),
-    );
-    $this->databaseContents['field_data_comment_body'] = array(
-      array(
+      ],
+    ];
+    $this->databaseContents['field_data_comment_body'] = [
+      [
         'entity_type' => 'comment',
         'bundle' => 'comment_node_test_content_type',
         'deleted' => '0',
@@ -92,8 +92,8 @@ protected function setUp() {
         'delta' => '0',
         'comment_body_value' => 'This is a comment',
         'comment_body_format' => 'filtered_html',
-      ),
-    );
+      ],
+    ];
     parent::setUp();
   }
 
diff --git a/core/modules/comment/tests/src/Unit/Migrate/d7/CommentTypeTest.php b/core/modules/comment/tests/src/Unit/Migrate/d7/CommentTypeTest.php
index 71c651bbe7467b51e0b0134b3e94b2e67cc7d130..106716d8f27df6b1c1bb2211caff70cdaba901d2 100644
--- a/core/modules/comment/tests/src/Unit/Migrate/d7/CommentTypeTest.php
+++ b/core/modules/comment/tests/src/Unit/Migrate/d7/CommentTypeTest.php
@@ -13,15 +13,15 @@ class CommentTypeTest extends MigrateSqlSourceTestCase {
 
   const PLUGIN_CLASS = 'Drupal\comment\Plugin\migrate\source\d7\CommentType';
 
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-    'source' => array(
+    'source' => [
       'plugin' => 'd7_comment_type',
-    ),
-  );
+    ],
+  ];
 
-  protected $expectedResults = array(
-    array(
+  protected $expectedResults = [
+    [
       'bundle' => 'comment_node_article',
       'node_type' => 'article',
       'default_mode' => '1',
@@ -31,15 +31,15 @@ class CommentTypeTest extends MigrateSqlSourceTestCase {
       'preview' => '0',
       'subject' => '1',
       'label' => 'Article comment',
-    ),
-  );
+    ],
+  ];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->databaseContents['node_type'] = array(
-      array(
+    $this->databaseContents['node_type'] = [
+      [
         'type' => 'article',
         'name' => 'Article',
         'base' => 'node_content',
@@ -53,10 +53,10 @@ protected function setUp() {
         'locked' => '0',
         'disabled' => '0',
         'orig_type' => 'article',
-      ),
-    );
-    $this->databaseContents['field_config_instance'] = array(
-      array(
+      ],
+    ];
+    $this->databaseContents['field_config_instance'] = [
+      [
         'id' => '14',
         'field_id' => '1',
         'field_name' => 'comment_body',
@@ -64,34 +64,34 @@ protected function setUp() {
         'bundle' => 'comment_node_article',
         'data' => 'a:0:{}',
         'deleted' => '0',
-      ),
-    );
-    $this->databaseContents['variable'] = array(
-      array(
+      ],
+    ];
+    $this->databaseContents['variable'] = [
+      [
         'name' => 'comment_default_mode_article',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_per_page_article',
         'value' => serialize(50),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_anonymous_article',
         'value' => serialize(0),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_form_location_article',
         'value' => serialize(1),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_preview_article',
         'value' => serialize(0),
-      ),
-      array(
+      ],
+      [
         'name' => 'comment_subject_article',
         'value' => serialize(1),
-      ),
-    );
+      ],
+    ];
     parent::setUp();
   }
 
diff --git a/core/modules/config/config.module b/core/modules/config/config.module
index 874caac8b5f49b07cb85e5e18d2ec933cffb35f3..b280fe84fa285cdc562a53f155f48fcc14d479b2 100644
--- a/core/modules/config/config.module
+++ b/core/modules/config/config.module
@@ -15,19 +15,19 @@ function config_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.config':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Configuration Manager module provides a user interface for importing and exporting configuration changes between installations of your website in different environments. Configuration is stored in YAML format. For more information, see the <a href=":url">online documentation for the Configuration Manager module</a>.', array(':url' => 'https://www.drupal.org/documentation/administer/config')) . '</p>';
+      $output .= '<p>' . t('The Configuration Manager module provides a user interface for importing and exporting configuration changes between installations of your website in different environments. Configuration is stored in YAML format. For more information, see the <a href=":url">online documentation for the Configuration Manager module</a>.', [':url' => 'https://www.drupal.org/documentation/administer/config']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Exporting the full configuration') . '</dt>';
-      $output .= '<dd>' . t('You can create and download an archive consisting of all your site\'s configuration exported as <em>*.yml</em> files on the <a href=":url">Export</a> page.', array(':url' => \Drupal::url('config.export_full'))) . '</dd>';
+      $output .= '<dd>' . t('You can create and download an archive consisting of all your site\'s configuration exported as <em>*.yml</em> files on the <a href=":url">Export</a> page.', [':url' => \Drupal::url('config.export_full')]) . '</dd>';
       $output .= '<dt>' . t('Importing a full configuration') . '</dt>';
-      $output .= '<dd>' . t('You can upload a full site configuration from an archive file on the <a href=":url">Import</a> page. When importing data from a different environment, the site and import files must have matching configuration values for UUID in the <em>system.site</em> configuration item. That means that your other environments should initially be set up as clones of the target site. Migrations are not supported.', array(':url' => \Drupal::url('config.import_full'))) . '</dd>';
+      $output .= '<dd>' . t('You can upload a full site configuration from an archive file on the <a href=":url">Import</a> page. When importing data from a different environment, the site and import files must have matching configuration values for UUID in the <em>system.site</em> configuration item. That means that your other environments should initially be set up as clones of the target site. Migrations are not supported.', [':url' => \Drupal::url('config.import_full')]) . '</dd>';
       $output .= '<dt>' . t('Synchronizing configuration') . '</dt>';
-      $output .= '<dd>' . t('You can review differences between the active configuration and an imported configuration archive on the <a href=":synchronize">Synchronize</a> page to ensure that the changes are as expected, before finalizing the import. The Synchronize page also shows configuration items that would be added or removed.', array(':synchronize' => \Drupal::url('config.sync'))) . '</dd>';
+      $output .= '<dd>' . t('You can review differences between the active configuration and an imported configuration archive on the <a href=":synchronize">Synchronize</a> page to ensure that the changes are as expected, before finalizing the import. The Synchronize page also shows configuration items that would be added or removed.', [':synchronize' => \Drupal::url('config.sync')]) . '</dd>';
       $output .= '<dt>' . t('Exporting a single configuration item') . '</dt>';
-      $output .= '<dd>' . t('You can export a single configuration item by selecting a <em>Configuration type</em> and <em>Configuration name</em> on the <a href=":single-export">Single export</a> page. The configuration and its corresponding <em>*.yml file name</em> are then displayed on the page for you to copy.', array(':single-export' => \Drupal::url('config.export_single'))) . '</dd>';
+      $output .= '<dd>' . t('You can export a single configuration item by selecting a <em>Configuration type</em> and <em>Configuration name</em> on the <a href=":single-export">Single export</a> page. The configuration and its corresponding <em>*.yml file name</em> are then displayed on the page for you to copy.', [':single-export' => \Drupal::url('config.export_single')]) . '</dd>';
       $output .= '<dt>' . t('Importing a single configuration item') . '</dt>';
-      $output .= '<dd>' . t('You can import a single configuration item by pasting it in YAML format into the form on the <a href=":single-import">Single import</a> page.', array(':single-import' => \Drupal::url('config.import_single'))) . '</dd>';
+      $output .= '<dd>' . t('You can import a single configuration item by pasting it in YAML format into the form on the <a href=":single-import">Single import</a> page.', [':single-import' => \Drupal::url('config.import_single')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -72,9 +72,9 @@ function config_file_download($uri) {
       $hostname = str_replace('.', '-', $request->getHttpHost());
       $filename = 'config' . '-' . $hostname . '-' . $date_string . '.tar.gz';
       $disposition = 'attachment; filename="' . $filename . '"';
-      return array(
+      return [
         'Content-disposition' => $disposition,
-      );
+      ];
     }
     return -1;
   }
diff --git a/core/modules/config/src/ConfigSubscriber.php b/core/modules/config/src/ConfigSubscriber.php
index 9b6c8421184b936ccc68bd2a7ee248683f1ca4d1..aebc86e61cac519b49cfa28a10e97f589ddad215 100644
--- a/core/modules/config/src/ConfigSubscriber.php
+++ b/core/modules/config/src/ConfigSubscriber.php
@@ -30,7 +30,7 @@ public function onConfigImporterValidate(ConfigImporterEvent $event) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::IMPORT_VALIDATE][] = array('onConfigImporterValidate', 20);
+    $events[ConfigEvents::IMPORT_VALIDATE][] = ['onConfigImporterValidate', 20];
     return $events;
   }
 
diff --git a/core/modules/config/src/Controller/ConfigController.php b/core/modules/config/src/Controller/ConfigController.php
index 8b9dc2541dfe7cc3b13c5688e5083df6e8fabdbf..bf47f72d4bc9600f62df6a5096db59cdf3d9bc02 100644
--- a/core/modules/config/src/Controller/ConfigController.php
+++ b/core/modules/config/src/Controller/ConfigController.php
@@ -103,7 +103,7 @@ public function downloadExport() {
       }
     }
 
-    $request = new Request(array('file' => 'config.tar.gz'));
+    $request = new Request(['file' => 'config.tar.gz']);
     return $this->fileDownloadController->download($request, 'temporary');
   }
 
@@ -129,34 +129,34 @@ public function diff($source_name, $target_name = NULL, $collection = NULL) {
     $diff = $this->configManager->diff($this->targetStorage, $this->sourceStorage, $source_name, $target_name, $collection);
     $this->diffFormatter->show_header = FALSE;
 
-    $build = array();
+    $build = [];
 
-    $build['#title'] = t('View changes of @config_file', array('@config_file' => $source_name));
+    $build['#title'] = t('View changes of @config_file', ['@config_file' => $source_name]);
     // Add the CSS for the inline diff.
     $build['#attached']['library'][] = 'system/diff';
 
-    $build['diff'] = array(
+    $build['diff'] = [
       '#type' => 'table',
-      '#attributes' => array(
-        'class' => array('diff'),
-      ),
-      '#header' => array(
-        array('data' => t('Active'), 'colspan' => '2'),
-        array('data' => t('Staged'), 'colspan' => '2'),
-      ),
+      '#attributes' => [
+        'class' => ['diff'],
+      ],
+      '#header' => [
+        ['data' => t('Active'), 'colspan' => '2'],
+        ['data' => t('Staged'), 'colspan' => '2'],
+      ],
       '#rows' => $this->diffFormatter->format($diff),
-    );
+    ];
 
-    $build['back'] = array(
+    $build['back'] = [
       '#type' => 'link',
-      '#attributes' => array(
-        'class' => array(
+      '#attributes' => [
+        'class' => [
           'dialog-cancel',
-        ),
-      ),
+        ],
+      ],
       '#title' => "Back to 'Synchronize configuration' page.",
       '#url' => Url::fromRoute('config.sync'),
-    );
+    ];
 
     return $build;
   }
diff --git a/core/modules/config/src/Form/ConfigExportForm.php b/core/modules/config/src/Form/ConfigExportForm.php
index 0da43ff31c5b91bc9c0cbeffcf1e42d068a9073e..e822f7fa422a86350c11bb93fd9141c45decfb0c 100644
--- a/core/modules/config/src/Form/ConfigExportForm.php
+++ b/core/modules/config/src/Form/ConfigExportForm.php
@@ -21,10 +21,10 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Export'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/config/src/Form/ConfigImportForm.php b/core/modules/config/src/Form/ConfigImportForm.php
index 1d651d8bf0a60bac89f1ca0edc2ff2f7b3419242..0c3def8619d6ef814979da2dbb693555e3768373 100644
--- a/core/modules/config/src/Form/ConfigImportForm.php
+++ b/core/modules/config/src/Form/ConfigImportForm.php
@@ -55,17 +55,17 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     if (!$directory_is_writable) {
       drupal_set_message($this->t('The directory %directory is not writable.', ['%directory' => $directory]), 'error');
     }
-    $form['import_tarball'] = array(
+    $form['import_tarball'] = [
       '#type' => 'file',
       '#title' => $this->t('Configuration archive'),
-      '#description' => $this->t('Allowed types: @extensions.', array('@extensions' => 'tar.gz tgz tar.bz2')),
-    );
+      '#description' => $this->t('Allowed types: @extensions.', ['@extensions' => 'tar.gz tgz tar.bz2']),
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Upload'),
       '#disabled' => !$directory_is_writable,
-    );
+    ];
     return $form;
   }
 
@@ -93,7 +93,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $this->configStorage->deleteAll();
       try {
         $archiver = new ArchiveTar($path, 'gz');
-        $files = array();
+        $files = [];
         foreach ($archiver->listContent() as $file) {
           $files[] = $file['filename'];
         }
@@ -102,7 +102,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         $form_state->setRedirect('config.sync');
       }
       catch (\Exception $e) {
-        drupal_set_message($this->t('Could not extract the contents of the tar file. The error message is <em>@message</em>', array('@message' => $e->getMessage())), 'error');
+        drupal_set_message($this->t('Could not extract the contents of the tar file. The error message is <em>@message</em>', ['@message' => $e->getMessage()]), 'error');
       }
       drupal_unlink($path);
     }
diff --git a/core/modules/config/src/Form/ConfigSingleExportForm.php b/core/modules/config/src/Form/ConfigSingleExportForm.php
index 86f1047e597124dc64b1874a77e8e87ee01baa05..8710655d7f949493befa4353d2cd38fa3763f58f 100644
--- a/core/modules/config/src/Form/ConfigSingleExportForm.php
+++ b/core/modules/config/src/Form/ConfigSingleExportForm.php
@@ -37,7 +37,7 @@ class ConfigSingleExportForm extends FormBase {
    *
    * @var \Drupal\Core\Entity\EntityTypeInterface[]
    */
-  protected $definitions = array();
+  protected $definitions = [];
 
   /**
    * Constructs a new ConfigSingleImportForm.
@@ -83,40 +83,40 @@ public function buildForm(array $form, FormStateInterface $form_state, $config_t
     }, $this->definitions);
     // Sort the entity types by label, then add the simple config to the top.
     uasort($entity_types, 'strnatcasecmp');
-    $config_types = array(
+    $config_types = [
       'system.simple' => $this->t('Simple configuration'),
-    ) + $entity_types;
-    $form['config_type'] = array(
+    ] + $entity_types;
+    $form['config_type'] = [
       '#title' => $this->t('Configuration type'),
       '#type' => 'select',
       '#options' => $config_types,
       '#default_value' => $config_type,
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => '::updateConfigurationType',
         'wrapper' => 'edit-config-type-wrapper',
-      ),
-    );
+      ],
+    ];
     $default_type = $form_state->getValue('config_type', $config_type);
-    $form['config_name'] = array(
+    $form['config_name'] = [
       '#title' => $this->t('Configuration name'),
       '#type' => 'select',
       '#options' => $this->findConfiguration($default_type),
       '#default_value' => $config_name,
       '#prefix' => '<div id="edit-config-type-wrapper">',
       '#suffix' => '</div>',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => '::updateExport',
         'wrapper' => 'edit-export-wrapper',
-      ),
-    );
+      ],
+    ];
 
-    $form['export'] = array(
+    $form['export'] = [
       '#title' => $this->t('Here is your configuration:'),
       '#type' => 'textarea',
       '#rows' => 24,
       '#prefix' => '<div id="edit-export-wrapper">',
       '#suffix' => '</div>',
-    );
+    ];
     if ($config_type && $config_name) {
       $fake_form_state = (new FormState())->setValues([
         'config_type' => $config_type,
@@ -150,7 +150,7 @@ public function updateExport($form, FormStateInterface $form_state) {
     }
     // Read the raw data for this config name, encode it, and display it.
     $form['export']['#value'] = Yaml::encode($this->configStorage->read($name));
-    $form['export']['#description'] = $this->t('Filename: %name', array('%name' => $name . '.yml'));
+    $form['export']['#description'] = $this->t('Filename: %name', ['%name' => $name . '.yml']);
     return $form['export'];
   }
 
@@ -158,9 +158,9 @@ public function updateExport($form, FormStateInterface $form_state) {
    * Handles switching the configuration type selector.
    */
   protected function findConfiguration($config_type) {
-    $names = array(
+    $names = [
       '' => $this->t('- Select -'),
-    );
+    ];
     // For a given entity type, load all entities.
     if ($config_type && $config_type !== 'system.simple') {
       $entity_storage = $this->entityManager->getStorage($config_type);
diff --git a/core/modules/config/src/Form/ConfigSingleImportForm.php b/core/modules/config/src/Form/ConfigSingleImportForm.php
index e21795770067c04af94a942856c9e581cbd6bda0..fcb388305e9dc3823b2724b4bf33dc1f5e951acf 100644
--- a/core/modules/config/src/Form/ConfigSingleImportForm.php
+++ b/core/modules/config/src/Form/ConfigSingleImportForm.php
@@ -111,7 +111,7 @@ class ConfigSingleImportForm extends ConfirmFormBase {
    *
    * @var array
    */
-  protected $data = array();
+  protected $data = [];
 
   /**
    * Constructs a new ConfigSingleImportForm.
@@ -198,10 +198,10 @@ public function getQuestion() {
       $type = $definition->getLowercaseLabel();
     }
 
-    $args = array(
+    $args = [
       '%name' => $name,
       '@type' => strtolower($type),
-    );
+    ];
     if ($this->configExists) {
       $question = $this->t('Are you sure you want to update the %name @type?', $args);
     }
@@ -220,7 +220,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       return parent::buildForm($form, $form_state);
     }
 
-    $entity_types = array();
+    $entity_types = [];
     foreach ($this->entityManager->getDefinitions() as $entity_type => $definition) {
       if ($definition->entityClassImplements(ConfigEntityInterface::class)) {
         $entity_types[$entity_type] = $definition->getLabel();
@@ -228,49 +228,49 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
     // Sort the entity types by label, then add the simple config to the top.
     uasort($entity_types, 'strnatcasecmp');
-    $config_types = array(
+    $config_types = [
       'system.simple' => $this->t('Simple configuration'),
-    ) + $entity_types;
-    $form['config_type'] = array(
+    ] + $entity_types;
+    $form['config_type'] = [
       '#title' => $this->t('Configuration type'),
       '#type' => 'select',
       '#options' => $config_types,
       '#required' => TRUE,
-    );
-    $form['config_name'] = array(
+    ];
+    $form['config_name'] = [
       '#title' => $this->t('Configuration name'),
       '#description' => $this->t('Enter the name of the configuration file without the <em>.yml</em> extension. (e.g. <em>system.site</em>)'),
       '#type' => 'textfield',
-      '#states' => array(
-        'required' => array(
-          ':input[name="config_type"]' => array('value' => 'system.simple'),
-        ),
-        'visible' => array(
-          ':input[name="config_type"]' => array('value' => 'system.simple'),
-        ),
-      ),
-    );
-    $form['import'] = array(
+      '#states' => [
+        'required' => [
+          ':input[name="config_type"]' => ['value' => 'system.simple'],
+        ],
+        'visible' => [
+          ':input[name="config_type"]' => ['value' => 'system.simple'],
+        ],
+      ],
+    ];
+    $form['import'] = [
       '#title' => $this->t('Paste your configuration here'),
       '#type' => 'textarea',
       '#rows' => 24,
       '#required' => TRUE,
-    );
-    $form['advanced'] = array(
+    ];
+    $form['advanced'] = [
       '#type' => 'details',
       '#title' => $this->t('Advanced'),
-    );
-    $form['advanced']['custom_entity_id'] = array(
+    ];
+    $form['advanced']['custom_entity_id'] = [
       '#title' => $this->t('Custom Entity ID'),
       '#type' => 'textfield',
       '#description' => $this->t('Specify a custom entity ID. This will override the entity ID in the configuration above.'),
-    );
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Import'),
       '#button_type' => 'primary',
-    );
+    ];
     return $form;
   }
 
@@ -305,7 +305,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
       $entity_storage = $this->entityManager->getStorage($form_state->getValue('config_type'));
       // If an entity ID was not specified, set an error.
       if (!isset($data[$id_key])) {
-        $form_state->setErrorByName('import', $this->t('Missing ID key "@id_key" for this @entity_type import.', array('@id_key' => $id_key, '@entity_type' => $definition->getLabel())));
+        $form_state->setErrorByName('import', $this->t('Missing ID key "@id_key" for this @entity_type import.', ['@id_key' => $id_key, '@entity_type' => $definition->getLabel()]));
         return;
       }
 
@@ -323,7 +323,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
         }
       }
       // If there is no entity with a matching ID, check for a UUID match.
-      elseif (isset($data['uuid']) && $entity_storage->loadByProperties(array('uuid' => $data['uuid']))) {
+      elseif (isset($data['uuid']) && $entity_storage->loadByProperties(['uuid' => $data['uuid']])) {
         $form_state->setErrorByName('import', $this->t('An entity with this UUID already exists but the machine name does not match.'));
       }
     }
diff --git a/core/modules/config/src/Form/ConfigSync.php b/core/modules/config/src/Form/ConfigSync.php
index 51cded2690e69b085a1ac788244c70cc8082ae82..fe1b2e496a2abde35f5b9fa58f40294ff4449f4a 100644
--- a/core/modules/config/src/Form/ConfigSync.php
+++ b/core/modules/config/src/Form/ConfigSync.php
@@ -171,20 +171,20 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Import all'),
-    );
+    ];
     $source_list = $this->syncStorage->listAll();
     $storage_comparer = new StorageComparer($this->syncStorage, $this->activeStorage, $this->configManager);
     if (empty($source_list) || !$storage_comparer->createChangelist()->hasChanges()) {
-      $form['no_changes'] = array(
+      $form['no_changes'] = [
         '#type' => 'table',
-        '#header' => array($this->t('Name'), $this->t('Operations')),
-        '#rows' => array(),
+        '#header' => [$this->t('Name'), $this->t('Operations')],
+        '#rows' => [],
         '#empty' => $this->t('There are no configuration changes to import.'),
-      );
+      ];
       $form['actions']['#access'] = FALSE;
       return $form;
     }
@@ -198,7 +198,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     if ($this->snapshotStorage->exists('core.extension')) {
       $snapshot_comparer = new StorageComparer($this->activeStorage, $this->snapshotStorage, $this->configManager);
       if (!$form_state->getUserInput() && $snapshot_comparer->createChangelist()->hasChanges()) {
-        $change_list = array();
+        $change_list = [];
         foreach ($snapshot_comparer->getAllCollectionNames() as $collection) {
           foreach ($snapshot_comparer->getChangelist(NULL, $collection) as $config_names) {
             if (empty($config_names)) {
@@ -231,11 +231,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     foreach ($storage_comparer->getAllCollectionNames() as $collection) {
       if ($collection != StorageInterface::DEFAULT_COLLECTION) {
-        $form[$collection]['collection_heading'] = array(
+        $form[$collection]['collection_heading'] = [
           '#type' => 'html_tag',
           '#tag' => 'h2',
-          '#value' => $this->t('@collection configuration collection', array('@collection' => $collection)),
-        );
+          '#value' => $this->t('@collection configuration collection', ['@collection' => $collection]),
+        ];
       }
       foreach ($storage_comparer->getChangelist(NULL, $collection) as $config_change_type => $config_names) {
         if (empty($config_names)) {
@@ -244,10 +244,10 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
         // @todo A table caption would be more appropriate, but does not have the
         //   visual importance of a heading.
-        $form[$collection][$config_change_type]['heading'] = array(
+        $form[$collection][$config_change_type]['heading'] = [
           '#type' => 'html_tag',
           '#tag' => 'h3',
-        );
+        ];
         switch ($config_change_type) {
           case 'create':
             $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count new', '@count new');
@@ -265,19 +265,19 @@ public function buildForm(array $form, FormStateInterface $form_state) {
             $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count renamed', '@count renamed');
             break;
         }
-        $form[$collection][$config_change_type]['list'] = array(
+        $form[$collection][$config_change_type]['list'] = [
           '#type' => 'table',
-          '#header' => array($this->t('Name'), $this->t('Operations')),
-        );
+          '#header' => [$this->t('Name'), $this->t('Operations')],
+        ];
 
         foreach ($config_names as $config_name) {
           if ($config_change_type == 'rename') {
             $names = $storage_comparer->extractRenameNames($config_name);
-            $route_options = array('source_name' => $names['old_name'], 'target_name' => $names['new_name']);
-            $config_name = $this->t('@source_name to @target_name', array('@source_name' => $names['old_name'], '@target_name' => $names['new_name']));
+            $route_options = ['source_name' => $names['old_name'], 'target_name' => $names['new_name']];
+            $config_name = $this->t('@source_name to @target_name', ['@source_name' => $names['old_name'], '@target_name' => $names['new_name']]);
           }
           else {
-            $route_options = array('source_name' => $config_name);
+            $route_options = ['source_name' => $config_name];
           }
           if ($collection != StorageInterface::DEFAULT_COLLECTION) {
             $route_name = 'config.diff_collection';
@@ -286,26 +286,26 @@ public function buildForm(array $form, FormStateInterface $form_state) {
           else {
             $route_name = 'config.diff';
           }
-          $links['view_diff'] = array(
+          $links['view_diff'] = [
             'title' => $this->t('View differences'),
             'url' => Url::fromRoute($route_name, $route_options),
-            'attributes' => array(
-              'class' => array('use-ajax'),
+            'attributes' => [
+              'class' => ['use-ajax'],
               'data-dialog-type' => 'modal',
-              'data-dialog-options' => json_encode(array(
+              'data-dialog-options' => json_encode([
                 'width' => 700
-              )),
-            ),
-          );
-          $form[$collection][$config_change_type]['list']['#rows'][] = array(
+              ]),
+            ],
+          ];
+          $form[$collection][$config_change_type]['list']['#rows'][] = [
             'name' => $config_name,
-            'operations' => array(
-              'data' => array(
+            'operations' => [
+              'data' => [
                 '#type' => 'operations',
                 '#links' => $links,
-              ),
-            ),
-          );
+              ],
+            ],
+          ];
         }
       }
     }
@@ -333,17 +333,17 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     else {
       try {
         $sync_steps = $config_importer->initialize();
-        $batch = array(
-          'operations' => array(),
-          'finished' => array(get_class($this), 'finishBatch'),
+        $batch = [
+          'operations' => [],
+          'finished' => [get_class($this), 'finishBatch'],
           'title' => t('Synchronizing configuration'),
           'init_message' => t('Starting configuration synchronization.'),
           'progress_message' => t('Completed step @current of @total.'),
           'error_message' => t('Configuration synchronization has encountered an error.'),
           'file' => __DIR__ . '/../../config.admin.inc',
-        );
+        ];
         foreach ($sync_steps as $sync_step) {
-          $batch['operations'][] = array(array(get_class($this), 'processBatch'), array($config_importer, $sync_step));
+          $batch['operations'][] = [[get_class($this), 'processBatch'], [$config_importer, $sync_step]];
         }
 
         batch_set($batch);
@@ -377,7 +377,7 @@ public static function processBatch(ConfigImporter $config_importer, $sync_step,
     $config_importer->doSyncStep($sync_step, $context);
     if ($errors = $config_importer->getErrors()) {
       if (!isset($context['results']['errors'])) {
-        $context['results']['errors'] = array();
+        $context['results']['errors'] = [];
       }
       $context['results']['errors'] += $errors;
     }
@@ -406,7 +406,7 @@ public static function finishBatch($success, $results, $operations) {
       // An error occurred.
       // $operations contains the operations that remained unprocessed.
       $error_operation = reset($operations);
-      $message = \Drupal::translation()->translate('An error occurred while processing %error_operation with arguments: @arguments', array('%error_operation' => $error_operation[0], '@arguments' => print_r($error_operation[1], TRUE)));
+      $message = \Drupal::translation()->translate('An error occurred while processing %error_operation with arguments: @arguments', ['%error_operation' => $error_operation[0], '@arguments' => print_r($error_operation[1], TRUE)]);
       drupal_set_message($message, 'error');
     }
   }
diff --git a/core/modules/config/src/Tests/ConfigEntityFormOverrideTest.php b/core/modules/config/src/Tests/ConfigEntityFormOverrideTest.php
index 92693c4a9e8fa4b0477a6bb0e4d036c11b241f8d..41419b031e6bf2c73a04b625185c4b77588a369a 100644
--- a/core/modules/config/src/Tests/ConfigEntityFormOverrideTest.php
+++ b/core/modules/config/src/Tests/ConfigEntityFormOverrideTest.php
@@ -14,7 +14,7 @@ class ConfigEntityFormOverrideTest extends WebTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Tests that overrides do not affect forms or listing screens.
@@ -29,10 +29,10 @@ public function testFormsWithOverrides() {
     $config_test_storage = $this->container->get('entity.manager')->getStorage('config_test');
 
     // Set up an override.
-    $settings['config']['config_test.dynamic.dotted.default']['label'] = (object) array(
+    $settings['config']['config_test.dynamic.dotted.default']['label'] = (object) [
       'value' => $overridden_label,
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
 
     // Test that the overridden label is loaded with the entity.
@@ -50,9 +50,9 @@ public function testFormsWithOverrides() {
     $this->assertNoText($overridden_label);
 
     // Change to a new label and test that the listing now has the edited label.
-    $edit = array(
+    $edit = [
       'label' => $edited_label,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->drupalGet('admin/structure/config_test');
     $this->assertNoText($overridden_label);
diff --git a/core/modules/config/src/Tests/ConfigEntityListTest.php b/core/modules/config/src/Tests/ConfigEntityListTest.php
index 9d31de05cb43b5dcaebfc6732534fafe806b6a6c..fbc7ad6a73c4011a2b4a34ac0cbe44e15af6a22a 100644
--- a/core/modules/config/src/Tests/ConfigEntityListTest.php
+++ b/core/modules/config/src/Tests/ConfigEntityListTest.php
@@ -50,71 +50,71 @@ function testList() {
     $this->assertTrue($entity instanceof ConfigTest, '"Default" ConfigTest entity is an instance of ConfigTest.');
 
     // Test getOperations() method.
-    $expected_operations = array(
-      'edit' => array (
+    $expected_operations = [
+      'edit' =>  [
         'title' => t('Edit'),
         'weight' => 10,
         'url' => $entity->urlInfo(),
-      ),
-      'disable' => array(
+      ],
+      'disable' => [
         'title' => t('Disable'),
         'weight' => 40,
         'url' => $entity->urlInfo('disable'),
-      ),
-      'delete' => array (
+      ],
+      'delete' =>  [
         'title' => t('Delete'),
         'weight' => 100,
         'url' => $entity->urlInfo('delete-form'),
-      ),
-    );
+      ],
+    ];
 
     $actual_operations = $controller->getOperations($entity);
     // Sort the operations to normalize link order.
-    uasort($actual_operations, array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
+    uasort($actual_operations, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
     $this->assertEqual($expected_operations, $actual_operations, 'The operations are identical.');
 
     // Test buildHeader() method.
-    $expected_items = array(
+    $expected_items = [
       'label' => 'Label',
       'id' => 'Machine name',
       'operations' => 'Operations',
-    );
+    ];
     $actual_items = $controller->buildHeader();
     $this->assertEqual($expected_items, $actual_items, 'Return value from buildHeader matches expected.');
 
     // Test buildRow() method.
     $build_operations = $controller->buildOperations($entity);
-    $expected_items = array(
+    $expected_items = [
       'label' => 'Default',
       'id' => 'dotted.default',
-      'operations' => array(
+      'operations' => [
         'data' => $build_operations,
-      ),
-    );
+      ],
+    ];
     $actual_items = $controller->buildRow($entity);
     $this->assertEqual($expected_items, $actual_items, 'Return value from buildRow matches expected.');
     // Test sorting.
     $storage = $controller->getStorage();
-    $entity = $storage->create(array(
+    $entity = $storage->create([
       'id' => 'alpha',
       'label' => 'Alpha',
       'weight' => 1,
-    ));
+    ]);
     $entity->save();
-    $entity = $storage->create(array(
+    $entity = $storage->create([
       'id' => 'omega',
       'label' => 'Omega',
       'weight' => 1,
-    ));
+    ]);
     $entity->save();
-    $entity = $storage->create(array(
+    $entity = $storage->create([
       'id' => 'beta',
       'label' => 'Beta',
       'weight' => 0,
-    ));
+    ]);
     $entity->save();
     $list = $controller->load();
-    $this->assertIdentical(array_keys($list), array('beta', 'dotted.default', 'alpha', 'omega'));
+    $this->assertIdentical(array_keys($list), ['beta', 'dotted.default', 'alpha', 'omega']);
 
     // Test that config entities that do not support status, do not have
     // enable/disable operations.
@@ -125,22 +125,22 @@ function testList() {
     $entity = $list['default'];
 
     // Test getOperations() method.
-    $expected_operations = array(
-      'edit' => array(
+    $expected_operations = [
+      'edit' => [
         'title' => t('Edit'),
         'weight' => 10,
         'url' => $entity->urlInfo(),
-      ),
-      'delete' => array(
+      ],
+      'delete' => [
         'title' => t('Delete'),
         'weight' => 100,
         'url' => $entity->urlInfo('delete-form'),
-      ),
-    );
+      ],
+    ];
 
     $actual_operations = $controller->getOperations($entity);
     // Sort the operations to normalize link order.
-    uasort($actual_operations, array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
+    uasort($actual_operations, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
     $this->assertEqual($expected_operations, $actual_operations, 'The operations are identical.');
   }
 
@@ -149,7 +149,7 @@ function testList() {
    */
   function testListUI() {
     // Log in as an administrative user to access the full menu trail.
-    $this->drupalLogin($this->drupalCreateUser(array('access administration pages', 'administer site configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer site configuration']));
 
     // Get the list callback page.
     $this->drupalGet('admin/structure/config_test');
@@ -166,7 +166,7 @@ function testListUI() {
     $this->assertEqual(count($elements), 3, 'Correct number of table header cells found.');
 
     // Test the contents of each th cell.
-    $expected_items = array('Label', 'Machine name', 'Operations');
+    $expected_items = ['Label', 'Machine name', 'Operations'];
     foreach ($elements as $key => $element) {
       $this->assertIdentical((string) $element[0], $expected_items[$key]);
     }
@@ -186,11 +186,11 @@ function testListUI() {
     $this->assertLink('Add test configuration');
     $this->clickLink('Add test configuration');
     $this->assertResponse(200);
-    $edit = array(
+    $edit = [
       'label' => 'Antelope',
       'id' => 'antelope',
       'weight' => 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     // Ensure that the entity's sort method was called.
@@ -207,7 +207,7 @@ function testListUI() {
     $this->clickLink('Edit', 1);
     $this->assertResponse(200);
     $this->assertTitle('Edit Antelope | Drupal');
-    $edit = array('label' => 'Albatross', 'id' => 'albatross');
+    $edit = ['label' => 'Albatross', 'id' => 'albatross'];
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     // Confirm that the user is returned to the listing, and verify that the
@@ -221,7 +221,7 @@ function testListUI() {
     $this->clickLink('Delete', 1);
     $this->assertResponse(200);
     $this->assertTitle('Are you sure you want to delete the test configuration Albatross? | Drupal');
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
 
     // Verify that the text of the label and machine name does not appear in
     // the list (though it may appear elsewhere on the page).
@@ -232,7 +232,7 @@ function testListUI() {
     $this->clickLink('Delete');
     $this->assertResponse(200);
     $this->assertTitle('Are you sure you want to delete the test configuration Default? | Drupal');
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
 
     // Verify that the text of the label and machine name does not appear in
     // the list (though it may appear elsewhere on the page).
@@ -253,12 +253,12 @@ public function testPager() {
 
     // Create 51 test entities.
     for ($i = 1; $i < 52; $i++) {
-      $storage->create(array(
+      $storage->create([
         'id' => str_pad($i, 2, '0', STR_PAD_LEFT),
         'label' => 'Test config entity ' . $i,
         'weight' => $i,
         'protected_property' => $i,
-      ))->save();
+      ])->save();
     }
 
     // Load the listing page.
diff --git a/core/modules/config/src/Tests/ConfigEntityTest.php b/core/modules/config/src/Tests/ConfigEntityTest.php
index a8a8f0f7479e873a399e1f53fdc7b61df4fbc910..77b35cc040dd43a17d0ac9147fdb518ead8d2e34 100644
--- a/core/modules/config/src/Tests/ConfigEntityTest.php
+++ b/core/modules/config/src/Tests/ConfigEntityTest.php
@@ -27,7 +27,7 @@ class ConfigEntityTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Tests CRUD operations.
@@ -76,9 +76,9 @@ function testCRUD() {
     }
 
     // Verify that an entity with an empty ID string is considered empty, too.
-    $empty_id = entity_create('config_test', array(
+    $empty_id = entity_create('config_test', [
       'id' => '',
-    ));
+    ]);
     $this->assertIdentical($empty_id->isNew(), TRUE);
     try {
       $empty_id->save();
@@ -89,11 +89,11 @@ function testCRUD() {
     }
 
     // Verify properties on a newly created entity.
-    $config_test = entity_create('config_test', $expected = array(
+    $config_test = entity_create('config_test', $expected = [
       'id' => $this->randomMachineName(),
       'label' => $this->randomString(),
       'style' => $this->randomMachineName(),
-    ));
+    ]);
     $this->assertTrue($config_test->uuid());
     $this->assertNotEqual($config_test->uuid(), $empty->uuid());
     $this->assertIdentical($config_test->label, $expected['label']);
@@ -141,13 +141,13 @@ function testCRUD() {
     // maximum allowed length, but not longer.
 
     // Test with a short ID.
-    $id_length_config_test = entity_create('config_test', array(
+    $id_length_config_test = entity_create('config_test', [
       'id' => $this->randomMachineName(8),
-    ));
+    ]);
     try {
       $id_length_config_test->save();
-      $this->pass(SafeMarkup::format("config_test entity with ID length @length was saved.", array(
-        '@length' => strlen($id_length_config_test->id()))
+      $this->pass(SafeMarkup::format("config_test entity with ID length @length was saved.", [
+        '@length' => strlen($id_length_config_test->id())]
       ));
     }
     catch (ConfigEntityIdLengthException $e) {
@@ -155,42 +155,42 @@ function testCRUD() {
     }
 
     // Test with an ID of the maximum allowed length.
-    $id_length_config_test = entity_create('config_test', array(
+    $id_length_config_test = entity_create('config_test', [
       'id' => $this->randomMachineName(static::MAX_ID_LENGTH),
-    ));
+    ]);
     try {
       $id_length_config_test->save();
-      $this->pass(SafeMarkup::format("config_test entity with ID length @length was saved.", array(
+      $this->pass(SafeMarkup::format("config_test entity with ID length @length was saved.", [
         '@length' => strlen($id_length_config_test->id()),
-      )));
+      ]));
     }
     catch (ConfigEntityIdLengthException $e) {
       $this->fail($e->getMessage());
     }
 
     // Test with an ID exceeding the maximum allowed length.
-    $id_length_config_test = entity_create('config_test', array(
+    $id_length_config_test = entity_create('config_test', [
       'id' => $this->randomMachineName(static::MAX_ID_LENGTH + 1),
-    ));
+    ]);
     try {
       $status = $id_length_config_test->save();
-      $this->fail(SafeMarkup::format("config_test entity with ID length @length exceeding the maximum allowed length of @max saved successfully", array(
+      $this->fail(SafeMarkup::format("config_test entity with ID length @length exceeding the maximum allowed length of @max saved successfully", [
         '@length' => strlen($id_length_config_test->id()),
         '@max' => static::MAX_ID_LENGTH,
-      )));
+      ]));
     }
     catch (ConfigEntityIdLengthException $e) {
-      $this->pass(SafeMarkup::format("config_test entity with ID length @length exceeding the maximum allowed length of @max failed to save", array(
+      $this->pass(SafeMarkup::format("config_test entity with ID length @length exceeding the maximum allowed length of @max failed to save", [
         '@length' => strlen($id_length_config_test->id()),
         '@max' => static::MAX_ID_LENGTH,
-      )));
+      ]));
     }
 
     // Ensure that creating an entity with the same id as an existing one is not
     // possible.
-    $same_id = entity_create('config_test', array(
+    $same_id = entity_create('config_test', [
       'id' => $config_test->id(),
-    ));
+    ]);
     $this->assertIdentical($same_id->isNew(), TRUE);
     try {
       $same_id->save();
@@ -201,7 +201,7 @@ function testCRUD() {
     }
 
     // Verify that renaming the ID returns correct status and properties.
-    $ids = array($expected['id'], 'second_' . $this->randomMachineName(4), 'third_' . $this->randomMachineName(4));
+    $ids = [$expected['id'], 'second_' . $this->randomMachineName(4), 'third_' . $this->randomMachineName(4)];
     for ($i = 1; $i < 3; $i++) {
       $old_id = $ids[$i - 1];
       $new_id = $ids[$i];
@@ -223,7 +223,7 @@ function testCRUD() {
 
     // Test config entity prepopulation.
     \Drupal::state()->set('config_test.prepopulate', TRUE);
-    $config_test = entity_create('config_test', array('foo' => 'bar'));
+    $config_test = entity_create('config_test', ['foo' => 'bar']);
     $this->assertEqual($config_test->get('foo'), 'baz', 'Initial value correctly populated');
   }
 
@@ -237,15 +237,15 @@ function testCRUDUI() {
     $label1 = $this->randomMachineName();
     $label2 = $this->randomMachineName();
     $label3 = $this->randomMachineName();
-    $message_insert = format_string('%label configuration has been created.', array('%label' => $label1));
-    $message_update = format_string('%label configuration has been updated.', array('%label' => $label2));
-    $message_delete = format_string('The test configuration %label has been deleted.', array('%label' => $label2));
+    $message_insert = format_string('%label configuration has been created.', ['%label' => $label1]);
+    $message_update = format_string('%label configuration has been updated.', ['%label' => $label2]);
+    $message_delete = format_string('The test configuration %label has been deleted.', ['%label' => $label2]);
 
     // Create a configuration entity.
-    $edit = array(
+    $edit = [
       'id' => $id,
       'label' => $label1,
-    );
+    ];
     $this->drupalPostForm('admin/structure/config_test/add', $edit, 'Save');
     $this->assertUrl('admin/structure/config_test');
     $this->assertResponse(200);
@@ -254,9 +254,9 @@ function testCRUDUI() {
     $this->assertLinkByHref("admin/structure/config_test/manage/$id");
 
     // Update the configuration entity.
-    $edit = array(
+    $edit = [
       'label' => $label2,
-    );
+    ];
     $this->drupalPostForm("admin/structure/config_test/manage/$id", $edit, 'Save');
     $this->assertUrl('admin/structure/config_test');
     $this->assertResponse(200);
@@ -269,7 +269,7 @@ function testCRUDUI() {
     $this->drupalGet("admin/structure/config_test/manage/$id");
     $this->clickLink(t('Delete'));
     $this->assertUrl("admin/structure/config_test/manage/$id/delete");
-    $this->drupalPostForm(NULL, array(), 'Delete');
+    $this->drupalPostForm(NULL, [], 'Delete');
     $this->assertUrl('admin/structure/config_test');
     $this->assertResponse(200);
     $this->assertNoRaw($message_update);
@@ -278,10 +278,10 @@ function testCRUDUI() {
     $this->assertNoLinkByHref("admin/structure/config_test/manage/$id");
 
     // Re-create a configuration entity.
-    $edit = array(
+    $edit = [
       'id' => $id,
       'label' => $label1,
-    );
+    ];
     $this->drupalPostForm('admin/structure/config_test/add', $edit, 'Save');
     $this->assertUrl('admin/structure/config_test');
     $this->assertResponse(200);
@@ -289,10 +289,10 @@ function testCRUDUI() {
     $this->assertLinkByHref("admin/structure/config_test/manage/$id");
 
     // Rename the configuration entity's ID/machine name.
-    $edit = array(
+    $edit = [
       'id' => strtolower($this->randomMachineName()),
       'label' => $label3,
-    );
+    ];
     $this->drupalPostForm("admin/structure/config_test/manage/$id", $edit, 'Save');
     $this->assertUrl('admin/structure/config_test');
     $this->assertResponse(200);
@@ -304,17 +304,17 @@ function testCRUDUI() {
     $this->assertLinkByHref("admin/structure/config_test/manage/$id");
 
     // Create a configuration entity with '0' machine name.
-    $edit = array(
+    $edit = [
       'id' => '0',
       'label' => '0',
-    );
+    ];
     $this->drupalPostForm('admin/structure/config_test/add', $edit, 'Save');
     $this->assertResponse(200);
-    $message_insert = format_string('%label configuration has been created.', array('%label' => $edit['label']));
+    $message_insert = format_string('%label configuration has been created.', ['%label' => $edit['label']]);
     $this->assertRaw($message_insert);
     $this->assertLinkByHref('admin/structure/config_test/manage/0');
     $this->assertLinkByHref('admin/structure/config_test/manage/0/delete');
-    $this->drupalPostForm('admin/structure/config_test/manage/0/delete', array(), 'Delete');
+    $this->drupalPostForm('admin/structure/config_test/manage/0/delete', [], 'Delete');
     $this->assertFalse(entity_load('config_test', '0'), 'Test entity deleted');
 
     // Create a configuration entity with a property that uses AJAX to show
diff --git a/core/modules/config/src/Tests/ConfigExportImportUITest.php b/core/modules/config/src/Tests/ConfigExportImportUITest.php
index 828d4aa07bdbd964fbbeaa24d3b1c9ca9cd956a7..9ba59a85cad250d2b839c14715d7bcec3c3836b5 100644
--- a/core/modules/config/src/Tests/ConfigExportImportUITest.php
+++ b/core/modules/config/src/Tests/ConfigExportImportUITest.php
@@ -67,7 +67,7 @@ class ConfigExportImportUITest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('config', 'node', 'field');
+  public static $modules = ['config', 'node', 'field'];
 
   /**
    * {@inheritdoc}
@@ -103,11 +103,11 @@ public function testExportImport() {
 
     // Create a field.
     $this->fieldName = Unicode::strtolower($this->randomMachineName());
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'node',
       'type' => 'text',
-    ));
+    ]);
     $this->fieldStorage->save();
     FieldConfig::create([
       'field_storage' => $this->fieldStorage,
@@ -116,9 +116,9 @@ public function testExportImport() {
     // Update the displays so that configuration does not change unexpectedly on
     // import.
     entity_get_form_display('node', $this->contentType->id(), 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'text_textfield',
-      ))
+      ])
       ->save();
     entity_get_display('node', $this->contentType->id(), 'full')
       ->setComponent($this->fieldName)
@@ -134,7 +134,7 @@ public function testExportImport() {
     $this->assertFieldByName("{$this->fieldName}[0][value]", '', 'Widget is displayed');
 
     // Export the configuration.
-    $this->drupalPostForm('admin/config/development/configuration/full/export', array(), 'Export');
+    $this->drupalPostForm('admin/config/development/configuration/full/export', [], 'Export');
     $this->tarball = $this->getRawContent();
 
     $this->config('system.site')
@@ -161,13 +161,13 @@ public function testExportImport() {
     // Import the configuration.
     $filename = 'temporary://' . $this->randomMachineName();
     file_put_contents($filename, $this->tarball);
-    $this->drupalPostForm('admin/config/development/configuration/full/import', array('files[import_tarball]' => $filename), 'Upload');
+    $this->drupalPostForm('admin/config/development/configuration/full/import', ['files[import_tarball]' => $filename], 'Upload');
     // There is no snapshot yet because an import has never run.
     $this->assertNoText(t('Warning message'));
     $this->assertNoText(t('There are no configuration changes to import.'));
     $this->assertText($this->contentType->label());
 
-    $this->drupalPostForm(NULL, array(), 'Import all');
+    $this->drupalPostForm(NULL, [], 'Import all');
     // After importing the snapshot has been updated an there are no warnings.
     $this->assertNoText(t('Warning message'));
     $this->assertText(t('There are no configuration changes to import.'));
@@ -217,25 +217,25 @@ public function testExportImportCollections() {
     /** @var \Drupal\Core\Config\StorageInterface $active_storage */
     $active_storage = \Drupal::service('config.storage');
     $test1_storage = $active_storage->createCollection('collection.test1');
-    $test1_storage->write('config_test.create', array('foo' => 'bar'));
-    $test1_storage->write('config_test.update', array('foo' => 'bar'));
+    $test1_storage->write('config_test.create', ['foo' => 'bar']);
+    $test1_storage->write('config_test.update', ['foo' => 'bar']);
     $test2_storage = $active_storage->createCollection('collection.test2');
-    $test2_storage->write('config_test.another_create', array('foo' => 'bar'));
-    $test2_storage->write('config_test.another_update', array('foo' => 'bar'));
+    $test2_storage->write('config_test.another_create', ['foo' => 'bar']);
+    $test2_storage->write('config_test.another_update', ['foo' => 'bar']);
 
     // Export the configuration.
-    $this->drupalPostForm('admin/config/development/configuration/full/export', array(), 'Export');
+    $this->drupalPostForm('admin/config/development/configuration/full/export', [], 'Export');
     $this->tarball = $this->getRawContent();
     $filename = file_directory_temp() . '/' . $this->randomMachineName();
     file_put_contents($filename, $this->tarball);
 
     // Set up the active storage collections to test import.
     $test1_storage->delete('config_test.create');
-    $test1_storage->write('config_test.update', array('foo' => 'baz'));
-    $test1_storage->write('config_test.delete', array('foo' => 'bar'));
+    $test1_storage->write('config_test.update', ['foo' => 'baz']);
+    $test1_storage->write('config_test.delete', ['foo' => 'bar']);
     $test2_storage->delete('config_test.another_create');
-    $test2_storage->write('config_test.another_update', array('foo' => 'baz'));
-    $test2_storage->write('config_test.another_delete', array('foo' => 'bar'));
+    $test2_storage->write('config_test.another_update', ['foo' => 'baz']);
+    $test2_storage->write('config_test.another_delete', ['foo' => 'bar']);
 
     // Create a snapshot.
     $snapshot_storage = \Drupal::service('config.storage.snapshot');
@@ -244,22 +244,22 @@ public function testExportImportCollections() {
     // Ensure that the snapshot has the expected collection data before import.
     $test1_snapshot = $snapshot_storage->createCollection('collection.test1');
     $data = $test1_snapshot->read('config_test.delete');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.delete in collection.test1 exists in the snapshot storage.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.delete in collection.test1 exists in the snapshot storage.');
     $data = $test1_snapshot->read('config_test.update');
-    $this->assertEqual($data, array('foo' => 'baz'), 'The config_test.update in collection.test1 exists in the snapshot storage.');
+    $this->assertEqual($data, ['foo' => 'baz'], 'The config_test.update in collection.test1 exists in the snapshot storage.');
     $this->assertFalse($test1_snapshot->read('config_test.create'), 'The config_test.create in collection.test1 does not exist in the snapshot storage.');
     $test2_snapshot = $snapshot_storage->createCollection('collection.test2');
     $data = $test2_snapshot->read('config_test.another_delete');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.another_delete in collection.test2 exists in the snapshot storage.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.another_delete in collection.test2 exists in the snapshot storage.');
     $data = $test2_snapshot->read('config_test.another_update');
-    $this->assertEqual($data, array('foo' => 'baz'), 'The config_test.another_update in collection.test2 exists in the snapshot storage.');
+    $this->assertEqual($data, ['foo' => 'baz'], 'The config_test.another_update in collection.test2 exists in the snapshot storage.');
     $this->assertFalse($test2_snapshot->read('config_test.another_create'), 'The config_test.another_create in collection.test2 does not exist in the snapshot storage.');
 
     // Create the tar that contains the expected content for the collections.
     $tar = new ArchiveTar($filename, 'gz');
     $content_list = $tar->listContent();
     // Convert the list of files into something easy to search.
-    $files = array();
+    $files = [];
     foreach ($content_list as $file) {
       $files[] = $file['filename'];
     }
@@ -270,12 +270,12 @@ public function testExportImportCollections() {
     $this->assertFalse(in_array('collection/test1/config_test.delete.yml', $files), 'Config export does not contain collection/test1/config_test.delete.yml.');
     $this->assertFalse(in_array('collection/test2/config_test.another_delete.yml', $files), 'Config export does not contain collection/test2/config_test.another_delete.yml.');
 
-    $this->drupalPostForm('admin/config/development/configuration/full/import', array('files[import_tarball]' => $filename), 'Upload');
+    $this->drupalPostForm('admin/config/development/configuration/full/import', ['files[import_tarball]' => $filename], 'Upload');
     // Verify that there are configuration differences to import.
     $this->drupalGet('admin/config/development/configuration');
     $this->assertNoText(t('There are no configuration changes to import.'));
-    $this->assertText(t('@collection configuration collection', array('@collection' => 'collection.test1')));
-    $this->assertText(t('@collection configuration collection', array('@collection' => 'collection.test2')));
+    $this->assertText(t('@collection configuration collection', ['@collection' => 'collection.test1']));
+    $this->assertText(t('@collection configuration collection', ['@collection' => 'collection.test2']));
     $this->assertText('config_test.create');
     $this->assertLinkByHref('admin/config/development/configuration/sync/diff_collection/collection.test1/config_test.create');
     $this->assertText('config_test.update');
@@ -289,35 +289,35 @@ public function testExportImportCollections() {
     $this->assertText('config_test.another_delete');
     $this->assertLinkByHref('admin/config/development/configuration/sync/diff_collection/collection.test2/config_test.another_delete');
 
-    $this->drupalPostForm(NULL, array(), 'Import all');
+    $this->drupalPostForm(NULL, [], 'Import all');
     $this->assertText(t('There are no configuration changes to import.'));
 
     // Test data in collections.
     $data = $test1_storage->read('config_test.create');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.create in collection.test1 has been created.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.create in collection.test1 has been created.');
     $data = $test1_storage->read('config_test.update');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.update in collection.test1 has been updated.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.update in collection.test1 has been updated.');
     $this->assertFalse($test1_storage->read('config_test.delete'), 'The config_test.delete in collection.test1 has been deleted.');
 
     $data = $test2_storage->read('config_test.another_create');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.another_create in collection.test2 has been created.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.another_create in collection.test2 has been created.');
     $data = $test2_storage->read('config_test.another_update');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.another_update in collection.test2 has been updated.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.another_update in collection.test2 has been updated.');
     $this->assertFalse($test2_storage->read('config_test.another_delete'), 'The config_test.another_delete in collection.test2 has been deleted.');
 
     // Ensure that the snapshot has been updated with the collection data.
     $snapshot_storage = \Drupal::service('config.storage.snapshot');
     $test1_snapshot = $snapshot_storage->createCollection('collection.test1');
     $data = $test1_snapshot->read('config_test.create');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.create in collection.test1 has been created in the snapshot storage.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.create in collection.test1 has been created in the snapshot storage.');
     $data = $test1_snapshot->read('config_test.update');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.update in collection.test1 has been updated in the snapshot storage.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.update in collection.test1 has been updated in the snapshot storage.');
     $this->assertFalse($test1_snapshot->read('config_test.delete'), 'The config_test.delete in collection.test1 does not exist in the snapshot storage.');
     $test2_snapshot = $snapshot_storage->createCollection('collection.test2');
     $data = $test2_snapshot->read('config_test.another_create');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.another_create in collection.test2 has been created in the snapshot storage.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.another_create in collection.test2 has been created in the snapshot storage.');
     $data = $test2_snapshot->read('config_test.another_update');
-    $this->assertEqual($data, array('foo' => 'bar'), 'The config_test.another_update in collection.test2 has been updated in the snapshot storage.');
+    $this->assertEqual($data, ['foo' => 'bar'], 'The config_test.another_update in collection.test2 has been updated in the snapshot storage.');
     $this->assertFalse($test2_snapshot->read('config_test.another_delete'), 'The config_test.another_delete in collection.test2 does not exist in the snapshot storage.');
   }
 
diff --git a/core/modules/config/src/Tests/ConfigExportUITest.php b/core/modules/config/src/Tests/ConfigExportUITest.php
index d3133d8dfddb88724f1034989cedfe6c10644973..839aa26cadeb98b89e8a9401ba907f12a7174da1 100644
--- a/core/modules/config/src/Tests/ConfigExportUITest.php
+++ b/core/modules/config/src/Tests/ConfigExportUITest.php
@@ -18,7 +18,7 @@ class ConfigExportUITest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('config', 'config_test');
+  public static $modules = ['config', 'config_test'];
 
   /**
    * {@inheritdoc}
@@ -27,13 +27,13 @@ protected function setUp() {
     parent::setUp();
 
     // Set up an override.
-    $settings['config']['system.maintenance']['message'] = (object) array(
+    $settings['config']['system.maintenance']['message'] = (object) [
       'value' => 'Foo',
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
 
-    $this->drupalLogin($this->drupalCreateUser(array('export configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['export configuration']));
   }
 
   /**
@@ -45,7 +45,7 @@ function testExport() {
     $this->assertFieldById('edit-submit', t('Export'));
 
     // Submit the export form and verify response.
-    $this->drupalPostForm('admin/config/development/configuration/full/export', array(), t('Export'));
+    $this->drupalPostForm('admin/config/development/configuration/full/export', [], t('Export'));
     $this->assertResponse(200, 'User can access the download callback.');
 
     // Test if header contains file name with hostname and timestamp.
@@ -70,7 +70,7 @@ function testExport() {
     // Prepare the list of config files from active storage, see
     // \Drupal\config\Controller\ConfigController::downloadExport().
     $storage_active = $this->container->get('config.storage');
-    $config_files = array();
+    $config_files = [];
     foreach ($storage_active->listAll() as $config_name) {
       $config_files[] = $config_name . '.yml';
     }
@@ -80,7 +80,7 @@ function testExport() {
 
     // Ensure the test configuration override is in effect but was not exported.
     $this->assertIdentical(\Drupal::config('system.maintenance')->get('message'), 'Foo');
-    $archiver->extract(file_directory_temp(), array('system.maintenance.yml'));
+    $archiver->extract(file_directory_temp(), ['system.maintenance.yml']);
     $file_contents = file_get_contents(file_directory_temp() . '/' . 'system.maintenance.yml');
     $exported = Yaml::decode($file_contents);
     $this->assertNotIdentical($exported['message'], 'Foo');
diff --git a/core/modules/config/src/Tests/ConfigFormOverrideTest.php b/core/modules/config/src/Tests/ConfigFormOverrideTest.php
index ffd44282093cc5c850522a601612d65acb9f40ca..f721eeba747cbb9e8071a81cb11bedc6107d6899 100644
--- a/core/modules/config/src/Tests/ConfigFormOverrideTest.php
+++ b/core/modules/config/src/Tests/ConfigFormOverrideTest.php
@@ -16,15 +16,15 @@ class ConfigFormOverrideTest extends WebTestBase {
    * Tests that overrides do not affect forms.
    */
   public function testFormsWithOverrides() {
-    $this->drupalLogin($this->drupalCreateUser(array('access administration pages', 'administer site configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer site configuration']));
 
     $overridden_name = 'Site name global conf override';
 
     // Set up an override.
-    $settings['config']['system.site']['name'] = (object) array(
+    $settings['config']['system.site']['name'] = (object) [
       'value' => $overridden_name,
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
 
     // Test that everything on the form is the same, but that the override
@@ -35,9 +35,9 @@ public function testFormsWithOverrides() {
     $this->assertIdentical((string) $elements[0]['value'], 'Drupal');
 
     // Submit the form and ensure the site name is not changed.
-    $edit = array(
+    $edit = [
       'site_name' => 'Custom site name',
-    );
+    ];
     $this->drupalPostForm('admin/config/system/site-information', $edit, t('Save configuration'));
     $this->assertTitle('Basic site settings | ' . $overridden_name);
     $elements = $this->xpath('//input[@name="site_name"]');
diff --git a/core/modules/config/src/Tests/ConfigImportAllTest.php b/core/modules/config/src/Tests/ConfigImportAllTest.php
index baeacb966f3b85fd55b7987a7a89dfa4f7db3f87..459be7a24fdd1b68f8e8353b91a816c656d9e3b7 100644
--- a/core/modules/config/src/Tests/ConfigImportAllTest.php
+++ b/core/modules/config/src/Tests/ConfigImportAllTest.php
@@ -36,7 +36,7 @@ class ConfigImportAllTest extends ModuleTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array('synchronize configuration'));
+    $this->webUser = $this->drupalCreateUser(['synchronize configuration']);
     $this->drupalLogin($this->webUser);
   }
 
@@ -124,12 +124,12 @@ public function testInstallUninstall() {
     }
 
     // Import the configuration thereby re-installing all the modules.
-    $this->drupalPostForm('admin/config/development/configuration', array(), t('Import all'));
+    $this->drupalPostForm('admin/config/development/configuration', [], t('Import all'));
     // Modules have been installed that have services.
     $this->rebuildContainer();
 
     // Check that there are no errors.
-    $this->assertIdentical($this->configImporter()->getErrors(), array());
+    $this->assertIdentical($this->configImporter()->getErrors(), []);
 
     // Check that all modules that were uninstalled are now reinstalled.
     $this->assertModules(array_keys($modules_to_uninstall), TRUE);
diff --git a/core/modules/config/src/Tests/ConfigImportInstallProfileTest.php b/core/modules/config/src/Tests/ConfigImportInstallProfileTest.php
index 0c74c7fa1025f091bb583c82f321f08c91b4ed4e..eaece36db3adcff323b12d6a26912001acba5fea 100644
--- a/core/modules/config/src/Tests/ConfigImportInstallProfileTest.php
+++ b/core/modules/config/src/Tests/ConfigImportInstallProfileTest.php
@@ -23,7 +23,7 @@ class ConfigImportInstallProfileTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('config');
+  public static $modules = ['config'];
 
   /**
    * A user with the 'synchronize configuration' permission.
@@ -35,7 +35,7 @@ class ConfigImportInstallProfileTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array('synchronize configuration'));
+    $this->webUser = $this->drupalCreateUser(['synchronize configuration']);
     $this->drupalLogin($this->webUser);
     $this->copyConfig($this->container->get('config.storage'), $this->container->get('config.storage.sync'));
   }
@@ -54,7 +54,7 @@ public function testInstallProfileValidation() {
     unset($core['module']['testing_config_import']);
     $sync->write('core.extension', $core);
 
-    $this->drupalPostForm('admin/config/development/configuration', array(), t('Import all'));
+    $this->drupalPostForm('admin/config/development/configuration', [], t('Import all'));
     $this->assertText('The configuration cannot be imported because it failed validation for the following reasons:');
     $this->assertText('Unable to uninstall the Testing config import profile since it is the install profile.');
 
@@ -69,7 +69,7 @@ public function testInstallProfileValidation() {
     $theme = $sync->read('system.theme');
     $theme['default'] = 'classy';
     $sync->write('system.theme', $theme);
-    $this->drupalPostForm('admin/config/development/configuration', array(), t('Import all'));
+    $this->drupalPostForm('admin/config/development/configuration', [], t('Import all'));
     $this->assertText('The configuration was imported successfully.');
     $this->rebuildContainer();
     $this->assertFalse(\Drupal::moduleHandler()->moduleExists('syslog'), 'The syslog module has been uninstalled.');
diff --git a/core/modules/config/src/Tests/ConfigImportUITest.php b/core/modules/config/src/Tests/ConfigImportUITest.php
index afa9b99582b8aae81157e92eddfbbbc93fd903cd..1b63c2abe63711626d887fe27eb27ed621b6f663 100644
--- a/core/modules/config/src/Tests/ConfigImportUITest.php
+++ b/core/modules/config/src/Tests/ConfigImportUITest.php
@@ -19,7 +19,7 @@ class ConfigImportUITest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('config', 'config_test', 'config_import_test', 'text', 'options');
+  public static $modules = ['config', 'config_test', 'config_import_test', 'text', 'options'];
 
   /**
    * A user with the 'synchronize configuration' permission.
@@ -31,7 +31,7 @@ class ConfigImportUITest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array('synchronize configuration'));
+    $this->webUser = $this->drupalCreateUser(['synchronize configuration']);
     $this->drupalLogin($this->webUser);
     $this->copyConfig($this->container->get('config.storage'), $this->container->get('config.storage.sync'));
   }
@@ -55,11 +55,11 @@ function testImport() {
     $this->assertIdentical($sync->exists($name), TRUE, $name . ' found.');
 
     // Create new config entity.
-    $original_dynamic_data = array(
+    $original_dynamic_data = [
       'uuid' => '30df59bd-7b03-4cf7-bb35-d42fc49f0651',
       'langcode' => \Drupal::languageManager()->getDefaultLanguage()->getId(),
       'status' => TRUE,
-      'dependencies' => array(),
+      'dependencies' => [],
       'id' => 'new',
       'label' => 'New',
       'weight' => 0,
@@ -67,7 +67,7 @@ function testImport() {
       'size' => '',
       'size_value' => '',
       'protected_property' => '',
-    );
+    ];
     $sync->write($dynamic_name, $original_dynamic_data);
     $this->assertIdentical($sync->exists($dynamic_name), TRUE, $dynamic_name . ' found.');
 
@@ -102,11 +102,11 @@ function testImport() {
     // handled correctly. Options depends on Text so Text should be installed
     // first. Since they were enabled during the test setup the core.extension
     // file in sync will already contain them.
-    \Drupal::service('module_installer')->uninstall(array('text', 'options'));
+    \Drupal::service('module_installer')->uninstall(['text', 'options']);
 
     // Set the state system to record installations and uninstallations.
-    \Drupal::state()->set('ConfigImportUITest.core.extension.modules_installed', array());
-    \Drupal::state()->set('ConfigImportUITest.core.extension.modules_uninstalled', array());
+    \Drupal::state()->set('ConfigImportUITest.core.extension.modules_installed', []);
+    \Drupal::state()->set('ConfigImportUITest.core.extension.modules_uninstalled', []);
 
     // Verify that both appear as ready to import.
     $this->drupalGet('admin/config/development/configuration');
@@ -118,7 +118,7 @@ function testImport() {
     $this->assertFieldById('edit-submit', t('Import all'));
 
     // Import and verify that both do not appear anymore.
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
     $this->assertNoRaw('<td>' . $name);
     $this->assertNoRaw('<td>' . $dynamic_name);
     $this->assertNoRaw('<td>core.extension');
@@ -150,9 +150,9 @@ function testImport() {
     $this->assertTrue($theme_info['bartik']->status, 'Bartik theme installed during import.');
 
     // Ensure installations and uninstallation occur as expected.
-    $installed = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_installed', array());
-    $uninstalled = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_uninstalled', array());
-    $expected = array('action', 'ban', 'text', 'options');
+    $installed = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_installed', []);
+    $uninstalled = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_uninstalled', []);
+    $expected = ['action', 'ban', 'text', 'options'];
     $this->assertIdentical($expected, $installed, 'Action, Ban, Text and Options modules installed in the correct order.');
     $this->assertTrue(empty($uninstalled), 'No modules uninstalled during import');
 
@@ -161,8 +161,8 @@ function testImport() {
     // configuration. This verifies that the module's default configuration is
     // used during configuration import and, additionally, that after installing
     // a module, that configuration is not synced twice.
-    $recursion_limit_values = \Drupal::state()->get('ConfigImportUITest.action.settings.recursion_limit', array());
-    $this->assertIdentical($recursion_limit_values, array(50));
+    $recursion_limit_values = \Drupal::state()->get('ConfigImportUITest.action.settings.recursion_limit', []);
+    $this->assertIdentical($recursion_limit_values, [50]);
 
     $core_extension = $this->config('core.extension')->get();
     unset($core_extension['module']['action']);
@@ -180,8 +180,8 @@ function testImport() {
     $sync->write('system.theme', $system_theme);
 
     // Set the state system to record installations and uninstallations.
-    \Drupal::state()->set('ConfigImportUITest.core.extension.modules_installed', array());
-    \Drupal::state()->set('ConfigImportUITest.core.extension.modules_uninstalled', array());
+    \Drupal::state()->set('ConfigImportUITest.core.extension.modules_installed', []);
+    \Drupal::state()->set('ConfigImportUITest.core.extension.modules_uninstalled', []);
 
     // Verify that both appear as ready to import.
     $this->drupalGet('admin/config/development/configuration');
@@ -190,7 +190,7 @@ function testImport() {
     $this->assertRaw('<td>action.settings');
 
     // Import and verify that both do not appear anymore.
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
     $this->assertNoRaw('<td>core.extension');
     $this->assertNoRaw('<td>system.theme');
     $this->assertNoRaw('<td>action.settings');
@@ -203,9 +203,9 @@ function testImport() {
     $this->assertFalse(\Drupal::moduleHandler()->moduleExists('text'), 'Text module uninstalled during import.');
 
     // Ensure installations and uninstallation occur as expected.
-    $installed = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_installed', array());
-    $uninstalled = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_uninstalled', array());
-    $expected = array('options', 'text', 'ban', 'action');
+    $installed = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_installed', []);
+    $uninstalled = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_uninstalled', []);
+    $expected = ['options', 'text', 'ban', 'action'];
     $this->assertIdentical($expected, $uninstalled, 'Options, Text, Ban and Action modules uninstalled in the correct order.');
     $this->assertTrue(empty($installed), 'No modules installed during import');
 
@@ -235,7 +235,7 @@ function testImportLock() {
     $this->container->get('lock.persistent')->acquire($config_importer::LOCK_NAME);
 
     // Attempt to import configuration and verify that an error message appears.
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
     $this->assertText(t('Another request may be synchronizing configuration already.'));
 
     // Release the lock, just to keep testing sane.
@@ -273,11 +273,11 @@ function testImportDiff() {
     $add_key = 'biff';
     $add_data = '<em>bangpow</em>';
     $change_data = '<p><em>foobar</em></p>';
-    $original_data = array(
+    $original_data = [
       'foo' => '<p>foobar</p>',
       'baz' => '<strong>no change</strong>',
       '404' => '<em>herp</em>',
-    );
+    ];
     // Update active storage to have html in config data.
     $this->config($config_name)->setData($original_data)->save();
 
@@ -290,7 +290,7 @@ function testImportDiff() {
 
     // Load the diff UI and verify that the diff reflects the change.
     $this->drupalGet('admin/config/development/configuration/sync/diff/' . $config_name);
-    $this->assertTitle(format_string('View changes of @config_name | Drupal', array('@config_name' => $config_name)));
+    $this->assertTitle(format_string('View changes of @config_name | Drupal', ['@config_name' => $config_name]));
 
     // The following assertions do not use $this::assertEscaped() because
     // \Drupal\Component\Diff\DiffFormatter adds markup that signifies what has
@@ -307,7 +307,7 @@ function testImportDiff() {
     $this->assertText(Html::escape("404: '<em>herp</em>'"));
 
     // Verify diff colors are displayed.
-    $result = $this->xpath('//table[contains(@class, :class)]', array(':class' => 'diff'));
+    $result = $this->xpath('//table[contains(@class, :class)]', [':class' => 'diff']);
     $this->assertEqual(count($result), 1, "Diff UI is displaying colors.");
 
     // Reset data back to original, and remove a key
@@ -351,7 +351,7 @@ public function testImportValidation() {
 
     $this->drupalGet('admin/config/development/configuration');
     $this->assertNoText(t('There are no configuration changes to import.'));
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
 
     // Verify that the validation messages appear.
     $this->assertText('The configuration cannot be imported because it failed validation for the following reasons:');
@@ -373,7 +373,7 @@ public function testConfigUninstallConfigException() {
     $this->assertText('core.extension');
 
     // Import and verify that both do not appear anymore.
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
     $this->assertText('Can not uninstall the Configuration module as part of a configuration synchronization through the user interface.');
   }
 
@@ -394,11 +394,11 @@ function testImportErrorLog() {
     $sync = $this->container->get('config.storage.sync');
     $uuid = $this->container->get('uuid');
 
-    $values_primary = array(
+    $values_primary = [
       'uuid' => $uuid->generate(),
       'langcode' => 'en',
       'status' => TRUE,
-      'dependencies' => array(),
+      'dependencies' => [],
       'id' => 'primary',
       'label' => 'Primary',
       'weight' => 0,
@@ -406,16 +406,16 @@ function testImportErrorLog() {
       'size' => NULL,
       'size_value' => NULL,
       'protected_property' => NULL,
-    );
+    ];
     $sync->write($name_primary, $values_primary);
-    $values_secondary = array(
+    $values_secondary = [
       'uuid' => $uuid->generate(),
       'langcode' => 'en',
       'status' => TRUE,
       // Add a dependency on primary, to ensure that is synced first.
-      'dependencies' => array(
-        'config' => array($name_primary),
-      ),
+      'dependencies' => [
+        'config' => [$name_primary],
+      ],
       'id' => 'secondary',
       'label' => 'Secondary Sync',
       'weight' => 0,
@@ -423,15 +423,15 @@ function testImportErrorLog() {
       'size' => NULL,
       'size_value' => NULL,
       'protected_property' => NULL,
-    );
+    ];
     $sync->write($name_secondary, $values_secondary);
     // Verify that there are configuration differences to import.
     $this->drupalGet('admin/config/development/configuration');
     $this->assertNoText(t('There are no configuration changes to import.'));
 
     // Attempt to import configuration and verify that an error message appears.
-    $this->drupalPostForm(NULL, array(), t('Import all'));
-    $this->assertText(SafeMarkup::format('Deleted and replaced configuration entity "@name"', array('@name' => $name_secondary)));
+    $this->drupalPostForm(NULL, [], t('Import all'));
+    $this->assertText(SafeMarkup::format('Deleted and replaced configuration entity "@name"', ['@name' => $name_secondary]));
     $this->assertText(t('The configuration was imported with errors.'));
     $this->assertNoText(t('The configuration was imported successfully.'));
     $this->assertText(t('There are no configuration changes to import.'));
@@ -443,42 +443,42 @@ function testImportErrorLog() {
    * @see \Drupal\Core\Entity\Event\BundleConfigImportValidate
    */
   public function testEntityBundleDelete() {
-    \Drupal::service('module_installer')->install(array('node'));
+    \Drupal::service('module_installer')->install(['node']);
     $this->copyConfig($this->container->get('config.storage'), $this->container->get('config.storage.sync'));
 
     $node_type = $this->drupalCreateContentType();
-    $node = $this->drupalCreateNode(array('type' => $node_type->id()));
+    $node = $this->drupalCreateNode(['type' => $node_type->id()]);
     $this->drupalGet('admin/config/development/configuration');
     // The node type, body field and entity displays will be scheduled for
     // removal.
-    $this->assertText(format_string('node.type.@type', array('@type' => $node_type->id())));
-    $this->assertText(format_string('field.field.node.@type.body', array('@type' => $node_type->id())));
-    $this->assertText(format_string('core.entity_view_display.node.@type.teaser', array('@type' => $node_type->id())));
-    $this->assertText(format_string('core.entity_view_display.node.@type.default', array('@type' => $node_type->id())));
-    $this->assertText(format_string('core.entity_form_display.node.@type.default', array('@type' => $node_type->id())));
+    $this->assertText(format_string('node.type.@type', ['@type' => $node_type->id()]));
+    $this->assertText(format_string('field.field.node.@type.body', ['@type' => $node_type->id()]));
+    $this->assertText(format_string('core.entity_view_display.node.@type.teaser', ['@type' => $node_type->id()]));
+    $this->assertText(format_string('core.entity_view_display.node.@type.default', ['@type' => $node_type->id()]));
+    $this->assertText(format_string('core.entity_form_display.node.@type.default', ['@type' => $node_type->id()]));
 
     // Attempt to import configuration and verify that an error message appears
     // and the node type, body field and entity displays are still scheduled for
     // removal.
-    $this->drupalPostForm(NULL, array(), t('Import all'));
-    $validation_message = t('Entities exist of type %entity_type and %bundle_label %bundle. These entities need to be deleted before importing.', array('%entity_type' => $node->getEntityType()->getLabel(), '%bundle_label' => $node->getEntityType()->getBundleLabel(), '%bundle' => $node_type->label()));
+    $this->drupalPostForm(NULL, [], t('Import all'));
+    $validation_message = t('Entities exist of type %entity_type and %bundle_label %bundle. These entities need to be deleted before importing.', ['%entity_type' => $node->getEntityType()->getLabel(), '%bundle_label' => $node->getEntityType()->getBundleLabel(), '%bundle' => $node_type->label()]);
     $this->assertRaw($validation_message);
-    $this->assertText(format_string('node.type.@type', array('@type' => $node_type->id())));
-    $this->assertText(format_string('field.field.node.@type.body', array('@type' => $node_type->id())));
-    $this->assertText(format_string('core.entity_view_display.node.@type.teaser', array('@type' => $node_type->id())));
-    $this->assertText(format_string('core.entity_view_display.node.@type.default', array('@type' => $node_type->id())));
-    $this->assertText(format_string('core.entity_form_display.node.@type.default', array('@type' => $node_type->id())));
+    $this->assertText(format_string('node.type.@type', ['@type' => $node_type->id()]));
+    $this->assertText(format_string('field.field.node.@type.body', ['@type' => $node_type->id()]));
+    $this->assertText(format_string('core.entity_view_display.node.@type.teaser', ['@type' => $node_type->id()]));
+    $this->assertText(format_string('core.entity_view_display.node.@type.default', ['@type' => $node_type->id()]));
+    $this->assertText(format_string('core.entity_form_display.node.@type.default', ['@type' => $node_type->id()]));
 
     // Delete the node and try to import again.
     $node->delete();
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
     $this->assertNoRaw($validation_message);
     $this->assertText(t('There are no configuration changes to import.'));
-    $this->assertNoText(format_string('node.type.@type', array('@type' => $node_type->id())));
-    $this->assertNoText(format_string('field.field.node.@type.body', array('@type' => $node_type->id())));
-    $this->assertNoText(format_string('core.entity_view_display.node.@type.teaser', array('@type' => $node_type->id())));
-    $this->assertNoText(format_string('core.entity_view_display.node.@type.default', array('@type' => $node_type->id())));
-    $this->assertNoText(format_string('core.entity_form_display.node.@type.default', array('@type' => $node_type->id())));
+    $this->assertNoText(format_string('node.type.@type', ['@type' => $node_type->id()]));
+    $this->assertNoText(format_string('field.field.node.@type.body', ['@type' => $node_type->id()]));
+    $this->assertNoText(format_string('core.entity_view_display.node.@type.teaser', ['@type' => $node_type->id()]));
+    $this->assertNoText(format_string('core.entity_view_display.node.@type.default', ['@type' => $node_type->id()]));
+    $this->assertNoText(format_string('core.entity_form_display.node.@type.default', ['@type' => $node_type->id()]));
   }
 
   /**
@@ -508,7 +508,7 @@ public function testExtensionValidation() {
     $core['theme']['does_not_exist'] = 0;
     $sync->write('core.extension', $core);
 
-    $this->drupalPostForm('admin/config/development/configuration', array(), t('Import all'));
+    $this->drupalPostForm('admin/config/development/configuration', [], t('Import all'));
     $this->assertText('The configuration cannot be imported because it failed validation for the following reasons:');
     $this->assertText('Unable to uninstall the Text module since the Node module is installed.');
     $this->assertText('Unable to uninstall the Classy theme since the Bartik theme is installed.');
diff --git a/core/modules/config/src/Tests/ConfigImportUploadTest.php b/core/modules/config/src/Tests/ConfigImportUploadTest.php
index 9836d771dd101b5de664028001156d7f9930aa4b..9792213a688d17b890fa198638e8c8595cecf6e9 100644
--- a/core/modules/config/src/Tests/ConfigImportUploadTest.php
+++ b/core/modules/config/src/Tests/ConfigImportUploadTest.php
@@ -23,12 +23,12 @@ class ConfigImportUploadTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('config');
+  public static $modules = ['config'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array('import configuration'));
+    $this->webUser = $this->drupalCreateUser(['import configuration']);
     $this->drupalLogin($this->webUser);
   }
 
@@ -42,7 +42,7 @@ function testImport() {
 
     // Attempt to upload a non-tar file.
     $text_file = current($this->drupalGetTestFiles('text'));
-    $edit = array('files[import_tarball]' => drupal_realpath($text_file->uri));
+    $edit = ['files[import_tarball]' => drupal_realpath($text_file->uri)];
     $this->drupalPostForm('admin/config/development/configuration/full/import', $edit, t('Upload'));
     $this->assertText(t('Could not extract the contents of the tar file'));
 
diff --git a/core/modules/config/src/Tests/ConfigInstallWebTest.php b/core/modules/config/src/Tests/ConfigInstallWebTest.php
index 8f9e1a1b8f9f359c031b4090c9beecbc7bb01d33..79b50a0a672241ed4fa17045d96ff5f4ffbf9f92 100644
--- a/core/modules/config/src/Tests/ConfigInstallWebTest.php
+++ b/core/modules/config/src/Tests/ConfigInstallWebTest.php
@@ -26,7 +26,7 @@ class ConfigInstallWebTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer modules', 'administer themes', 'administer site configuration'));
+    $this->adminUser = $this->drupalCreateUser(['administer modules', 'administer themes', 'administer site configuration']);
 
     // Ensure the global variable being asserted by this test does not exist;
     // a previous test executed in this request/process might have set it.
@@ -41,7 +41,7 @@ function testIntegrationModuleReinstallation() {
     $default_configuration_entity = 'config_test.dynamic.config_integration_test';
 
     // Install the config_test module we're integrating with.
-    \Drupal::service('module_installer')->install(array('config_test'));
+    \Drupal::service('module_installer')->install(['config_test']);
 
     // Verify the configuration does not exist prior to installation.
     $config_static = $this->config($default_config);
@@ -50,7 +50,7 @@ function testIntegrationModuleReinstallation() {
     $this->assertIdentical($config_entity->isNew(), TRUE);
 
     // Install the integration module.
-    \Drupal::service('module_installer')->install(array('config_integration_test'));
+    \Drupal::service('module_installer')->install(['config_integration_test']);
 
     // Verify that default module config exists.
     \Drupal::configFactory()->reset($default_config);
@@ -73,7 +73,7 @@ function testIntegrationModuleReinstallation() {
     $this->container->get('config.factory')->reset();
 
     // Disable and uninstall the integration module.
-    $this->container->get('module_installer')->uninstall(array('config_integration_test'));
+    $this->container->get('module_installer')->uninstall(['config_integration_test']);
 
     // Verify the integration module's config was uninstalled.
     $config_static = $this->config($default_config);
@@ -86,7 +86,7 @@ function testIntegrationModuleReinstallation() {
 
     // Reinstall the integration module.
     try {
-      \Drupal::service('module_installer')->install(array('config_integration_test'));
+      \Drupal::service('module_installer')->install(['config_integration_test']);
       $this->fail('Expected PreExistingConfigException not thrown.');
     }
     catch (PreExistingConfigException $e) {
@@ -97,7 +97,7 @@ function testIntegrationModuleReinstallation() {
 
     // Delete the configuration entity so that the install will work.
     $config_entity->delete();
-    \Drupal::service('module_installer')->install(array('config_integration_test'));
+    \Drupal::service('module_installer')->install(['config_integration_test']);
 
     // Verify the integration module's config was re-installed.
     \Drupal::configFactory()->reset($default_config);
@@ -122,19 +122,19 @@ public function testPreExistingConfigInstall() {
     // will install the config_test module first because it is a dependency of
     // config_install_fail_test.
     // @see \Drupal\system\Form\ModulesListForm::submitForm()
-    $this->drupalPostForm('admin/modules', array('modules[config_test][enable]' => TRUE, 'modules[config_install_fail_test][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config_test][enable]' => TRUE, 'modules[config_install_fail_test][enable]' => TRUE], t('Install'));
     $this->assertRaw('Unable to install Configuration install fail test, <em class="placeholder">config_test.dynamic.dotted.default</em> already exists in active configuration.');
 
     // Uninstall the config_test module to test the confirm form.
-    $this->drupalPostForm('admin/modules/uninstall', array('uninstall[config_test]' => TRUE), t('Uninstall'));
-    $this->drupalPostForm(NULL, array(), t('Uninstall'));
+    $this->drupalPostForm('admin/modules/uninstall', ['uninstall[config_test]' => TRUE], t('Uninstall'));
+    $this->drupalPostForm(NULL, [], t('Uninstall'));
 
     // Try to install config_install_fail_test without selecting config_test.
     // The user is shown a confirm form because the config_test module is a
     // dependency.
     // @see \Drupal\system\Form\ModulesListConfirmForm::submitForm()
-    $this->drupalPostForm('admin/modules', array('modules[config_install_fail_test][enable]' => TRUE), t('Install'));
-    $this->drupalPostForm(NULL, array(), t('Continue'));
+    $this->drupalPostForm('admin/modules', ['modules[config_install_fail_test][enable]' => TRUE], t('Install'));
+    $this->drupalPostForm(NULL, [], t('Continue'));
     $this->assertRaw('Unable to install Configuration install fail test, <em class="placeholder">config_test.dynamic.dotted.default</em> already exists in active configuration.');
 
     // Test that collection configuration clashes during a module install are
@@ -147,7 +147,7 @@ public function testPreExistingConfigInstall() {
       ->set('label', 'Je suis Charlie')
       ->save();
 
-    $this->drupalPostForm('admin/modules', array('modules[config_install_fail_test][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config_install_fail_test][enable]' => TRUE], t('Install'));
     $this->assertRaw('Unable to install Configuration install fail test, <em class="placeholder">config_test.dynamic.dotted.default, language/fr/config_test.dynamic.dotted.default</em> already exist in active configuration.');
 
     // Test installing a theme through the UI that has existing configuration.
@@ -178,16 +178,16 @@ public function testUnmetDependenciesInstall() {
     $this->drupalLogin($this->adminUser);
     // We need to install separately since config_install_dependency_test does
     // not depend on config_test and order is important.
-    $this->drupalPostForm('admin/modules', array('modules[config_test][enable]' => TRUE), t('Install'));
-    $this->drupalPostForm('admin/modules', array('modules[config_install_dependency_test][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config_test][enable]' => TRUE], t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config_install_dependency_test][enable]' => TRUE], t('Install'));
     $this->assertRaw('Unable to install <em class="placeholder">Config install dependency test</em> due to unmet dependencies: <em class="placeholder">config_test.dynamic.other_module_test_with_dependency (config_other_module_config_test, config_test.dynamic.dotted.english)</em>');
 
-    $this->drupalPostForm('admin/modules', array('modules[config_test_language][enable]' => TRUE), t('Install'));
-    $this->drupalPostForm('admin/modules', array('modules[config_install_dependency_test][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config_test_language][enable]' => TRUE], t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config_install_dependency_test][enable]' => TRUE], t('Install'));
     $this->assertRaw('Unable to install <em class="placeholder">Config install dependency test</em> due to unmet dependencies: <em class="placeholder">config_test.dynamic.other_module_test_with_dependency (config_other_module_config_test)</em>');
 
-    $this->drupalPostForm('admin/modules', array('modules[config_other_module_config_test][enable]' => TRUE), t('Install'));
-    $this->drupalPostForm('admin/modules', array('modules[config_install_dependency_test][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config_other_module_config_test][enable]' => TRUE], t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config_install_dependency_test][enable]' => TRUE], t('Install'));
     $this->rebuildContainer();
     $this->assertTrue(entity_load('config_test', 'other_module_test_with_dependency'), 'The config_test.dynamic.other_module_test_with_dependency configuration has been created during install.');
   }
@@ -197,12 +197,12 @@ public function testUnmetDependenciesInstall() {
    */
   public function testConfigModuleRequirements() {
     $this->drupalLogin($this->adminUser);
-    $this->drupalPostForm('admin/modules', array('modules[config][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[config][enable]' => TRUE], t('Install'));
 
     $directory = config_get_config_directory(CONFIG_SYNC_DIRECTORY);
     file_unmanaged_delete_recursive($directory);
     $this->drupalGet('/admin/reports/status');
-    $this->assertRaw(t('The directory %directory does not exist.', array('%directory' => $directory)));
+    $this->assertRaw(t('The directory %directory does not exist.', ['%directory' => $directory]));
 
     file_prepare_directory($directory, FILE_CREATE_DIRECTORY);
     \Drupal::service('file_system')->chmod($directory, 0555);
diff --git a/core/modules/config/src/Tests/ConfigSingleImportExportTest.php b/core/modules/config/src/Tests/ConfigSingleImportExportTest.php
index 53f6164cc6bd94c1ea86aa3a5caa0ee8ef1efdda..16cff0aa8a7f820313ebc9db1aba79d02946fb27 100644
--- a/core/modules/config/src/Tests/ConfigSingleImportExportTest.php
+++ b/core/modules/config/src/Tests/ConfigSingleImportExportTest.php
@@ -39,7 +39,7 @@ public function testImport() {
     $storage = \Drupal::entityManager()->getStorage('config_test');
     $uuid = \Drupal::service('uuid');
 
-    $this->drupalLogin($this->drupalCreateUser(array('import configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['import configuration']));
 
     // Attempt an import with invalid YAML.
     $edit = [
@@ -57,20 +57,20 @@ public function testImport() {
 style: ''
 status: '1'
 EOD;
-    $edit = array(
+    $edit = [
       'config_type' => 'config_test',
       'import' => $import,
-    );
+    ];
     // Attempt an import with a missing ID.
     $this->drupalPostForm('admin/config/development/configuration/single/import', $edit, t('Import'));
-    $this->assertText(t('Missing ID key "@id_key" for this @entity_type import.', array('@id_key' => 'id', '@entity_type' => 'Test configuration')));
+    $this->assertText(t('Missing ID key "@id_key" for this @entity_type import.', ['@id_key' => 'id', '@entity_type' => 'Test configuration']));
 
     // Perform an import with no specified UUID and a unique ID.
     $this->assertNull($storage->load('first'));
     $edit['import'] = "id: first\n" . $edit['import'];
     $this->drupalPostForm('admin/config/development/configuration/single/import', $edit, t('Import'));
-    $this->assertRaw(t('Are you sure you want to create a new %name @type?', array('%name' => 'first', '@type' => 'test configuration')));
-    $this->drupalPostForm(NULL, array(), t('Confirm'));
+    $this->assertRaw(t('Are you sure you want to create a new %name @type?', ['%name' => 'first', '@type' => 'test configuration']));
+    $this->drupalPostForm(NULL, [], t('Confirm'));
     $entity = $storage->load('first');
     $this->assertIdentical($entity->label(), 'First');
     $this->assertIdentical($entity->id(), 'first');
@@ -89,8 +89,8 @@ public function testImport() {
     // Attempt an import with a custom ID.
     $edit['custom_entity_id'] = 'custom_id';
     $this->drupalPostForm('admin/config/development/configuration/single/import', $edit, t('Import'));
-    $this->assertRaw(t('Are you sure you want to create a new %name @type?', array('%name' => 'custom_id', '@type' => 'test configuration')));
-    $this->drupalPostForm(NULL, array(), t('Confirm'));
+    $this->assertRaw(t('Are you sure you want to create a new %name @type?', ['%name' => 'custom_id', '@type' => 'test configuration']));
+    $this->drupalPostForm(NULL, [], t('Confirm'));
     $this->assertRaw(t('The configuration was imported successfully.'));
 
     // Perform an import with a unique ID and UUID.
@@ -101,15 +101,15 @@ public function testImport() {
 style: ''
 status: '0'
 EOD;
-    $edit = array(
+    $edit = [
       'config_type' => 'config_test',
       'import' => $import,
-    );
+    ];
     $second_uuid = $uuid->generate();
     $edit['import'] .= "\nuuid: " . $second_uuid;
     $this->drupalPostForm('admin/config/development/configuration/single/import', $edit, t('Import'));
-    $this->assertRaw(t('Are you sure you want to create a new %name @type?', array('%name' => 'second', '@type' => 'test configuration')));
-    $this->drupalPostForm(NULL, array(), t('Confirm'));
+    $this->assertRaw(t('Are you sure you want to create a new %name @type?', ['%name' => 'second', '@type' => 'test configuration']));
+    $this->drupalPostForm(NULL, [], t('Confirm'));
     $entity = $storage->load('second');
     $this->assertRaw(t('The configuration was imported successfully.'));
     $this->assertIdentical($entity->label(), 'Second');
@@ -126,13 +126,13 @@ public function testImport() {
 style: ''
 status: '0'
 EOD;
-    $edit = array(
+    $edit = [
       'config_type' => 'config_test',
       'import' => $import,
-    );
+    ];
     $this->drupalPostForm('admin/config/development/configuration/single/import', $edit, t('Import'));
-    $this->assertRaw(t('Are you sure you want to update the %name @type?', array('%name' => 'second', '@type' => 'test configuration')));
-    $this->drupalPostForm(NULL, array(), t('Confirm'));
+    $this->assertRaw(t('Are you sure you want to update the %name @type?', ['%name' => 'second', '@type' => 'test configuration']));
+    $this->drupalPostForm(NULL, [], t('Confirm'));
     $entity = $storage->load('second');
     $this->assertRaw(t('The configuration was imported successfully.'));
     $this->assertIdentical($entity->label(), 'Second updated');
@@ -149,10 +149,10 @@ public function testImport() {
   module:
     - does_not_exist
 EOD;
-    $edit = array(
+    $edit = [
       'config_type' => 'config_test',
       'import' => $import,
-    );
+    ];
     $this->drupalPostForm('admin/config/development/configuration/single/import', $edit, t('Import'));
     $this->assertRaw(t('Configuration %name depends on the %owner module that will not be installed after import.', ['%name' => 'config_test.dynamic.second', '%owner' => 'does_not_exist']));
   }
@@ -161,20 +161,20 @@ public function testImport() {
    * Tests importing a simple configuration file.
    */
   public function testImportSimpleConfiguration() {
-    $this->drupalLogin($this->drupalCreateUser(array('import configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['import configuration']));
     $config = $this->config('system.site')->set('name', 'Test simple import');
 
     // Place branding block with site name into header region.
     $this->drupalPlaceBlock('system_branding_block', ['region' => 'header']);
 
-    $edit = array(
+    $edit = [
       'config_type' => 'system.simple',
       'config_name' => $config->getName(),
       'import' => Yaml::encode($config->get()),
-    );
+    ];
     $this->drupalPostForm('admin/config/development/configuration/single/import', $edit, t('Import'));
-    $this->assertRaw(t('Are you sure you want to update the %name @type?', array('%name' => $config->getName(), '@type' => 'simple configuration')));
-    $this->drupalPostForm(NULL, array(), t('Confirm'));
+    $this->assertRaw(t('Are you sure you want to update the %name @type?', ['%name' => $config->getName(), '@type' => 'simple configuration']));
+    $this->drupalPostForm(NULL, [], t('Confirm'));
     $this->drupalGet('');
     $this->assertText('Test simple import');
 
@@ -183,11 +183,11 @@ public function testImportSimpleConfiguration() {
     $config_data = $this->config('core.extension')->get();
     // Simulate uninstalling the Config module.
     unset($config_data['module']['config']);
-    $edit = array(
+    $edit = [
       'config_type' => 'system.simple',
       'config_name' => 'core.extension',
       'import' => Yaml::encode($config_data),
-    );
+    ];
     $this->drupalPostForm('admin/config/development/configuration/single/import', $edit, t('Import'));
     $this->assertText(t('Can not uninstall the Configuration module as part of a configuration synchronization through the user interface.'));
 
@@ -197,14 +197,14 @@ public function testImportSimpleConfiguration() {
    * Tests exporting a single configuration file.
    */
   public function testExport() {
-    $this->drupalLogin($this->drupalCreateUser(array('export configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['export configuration']));
 
     $this->drupalGet('admin/config/development/configuration/single/export/system.simple');
     $this->assertFieldByXPath('//select[@name="config_type"]//option[@selected="selected"]', t('Simple configuration'), 'The simple configuration option is selected when specified in the URL.');
     // Spot check several known simple configuration files.
     $element = $this->xpath('//select[@name="config_name"]');
     $options = $this->getAllOptions($element[0]);
-    $expected_options = array('system.site', 'user.settings');
+    $expected_options = ['system.site', 'user.settings'];
     foreach ($options as &$option) {
       $option = (string) $option;
     }
diff --git a/core/modules/config/src/Tests/LanguageNegotiationFormOverrideTest.php b/core/modules/config/src/Tests/LanguageNegotiationFormOverrideTest.php
index 1aa4c9a2bf4748ad9dc281ff71fb9714c2d230c9..ba67960650b48e967909a279e5b3ef3df492a5e4 100644
--- a/core/modules/config/src/Tests/LanguageNegotiationFormOverrideTest.php
+++ b/core/modules/config/src/Tests/LanguageNegotiationFormOverrideTest.php
@@ -12,7 +12,7 @@
  */
 class LanguageNegotiationFormOverrideTest extends WebTestBase {
 
-  public static $modules = array('language', 'locale', 'locale_test');
+  public static $modules = ['language', 'locale', 'locale_test'];
 
   /**
    * Tests that overrides do not affect language-negotiation form values.
@@ -23,16 +23,16 @@ public function testFormWithOverride() {
     $overridden_value_es = 'loquesea';
 
     // Set up an override.
-    $settings['config']['language.negotiation']['url']['prefixes'] = (object) array(
-      'value' => array('en' => $overridden_value_en, 'es' => $overridden_value_es),
+    $settings['config']['language.negotiation']['url']['prefixes'] = (object) [
+      'value' => ['en' => $overridden_value_en, 'es' => $overridden_value_es],
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
 
     // Add predefined language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'es',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Overridden string for language-negotiation should not exist in the form.
diff --git a/core/modules/config/tests/config_collection_install_test/src/EventSubscriber.php b/core/modules/config/tests/config_collection_install_test/src/EventSubscriber.php
index da3a9f1131d7210e14f1c40aa08c230b6c1b3cc9..76714a5b97d7bf13e72fc8c8b95c8fe73823166b 100644
--- a/core/modules/config/tests/config_collection_install_test/src/EventSubscriber.php
+++ b/core/modules/config/tests/config_collection_install_test/src/EventSubscriber.php
@@ -33,7 +33,7 @@ public function __construct(StateInterface $state) {
    *   The configuration collection info event.
    */
   public function addCollections(ConfigCollectionInfo $collection_info) {
-    $collections = $this->state->get('config_collection_install_test.collection_names', array());
+    $collections = $this->state->get('config_collection_install_test.collection_names', []);
     foreach ($collections as $collection) {
       $collection_info->addCollection($collection);
     }
@@ -43,7 +43,7 @@ public function addCollections(ConfigCollectionInfo $collection_info) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::COLLECTION_INFO][] = array('addCollections');
+    $events[ConfigEvents::COLLECTION_INFO][] = ['addCollections'];
     return $events;
   }
 
diff --git a/core/modules/config/tests/config_entity_static_cache_test/src/ConfigOverrider.php b/core/modules/config/tests/config_entity_static_cache_test/src/ConfigOverrider.php
index 2345d55175adc7b6414430442021d01c8239a6b0..8d21ee4e832ddac86055abce6acee89e69517012 100644
--- a/core/modules/config/tests/config_entity_static_cache_test/src/ConfigOverrider.php
+++ b/core/modules/config/tests/config_entity_static_cache_test/src/ConfigOverrider.php
@@ -15,11 +15,11 @@ class ConfigOverrider implements ConfigFactoryOverrideInterface {
    * {@inheritdoc}
    */
   public function loadOverrides($names) {
-    return array(
-      'config_test.dynamic.test_1' => array(
+    return [
+      'config_test.dynamic.test_1' => [
         'label' => 'Overridden label',
-      )
-    );
+      ]
+    ];
   }
 
   /**
diff --git a/core/modules/config/tests/config_events_test/src/EventSubscriber.php b/core/modules/config/tests/config_events_test/src/EventSubscriber.php
index bfa70db3ca890a485e5bddaf10257ddd91030b1d..39e8eb80fc1da1a3bd9c2a4c3f0aaad200e0f506 100644
--- a/core/modules/config/tests/config_events_test/src/EventSubscriber.php
+++ b/core/modules/config/tests/config_events_test/src/EventSubscriber.php
@@ -37,21 +37,21 @@ public function __construct(StateInterface $state) {
    */
   public function configEventRecorder(ConfigCrudEvent $event, $name) {
     $config = $event->getConfig();
-    $this->state->set('config_events_test.event', array(
+    $this->state->set('config_events_test.event', [
       'event_name' => $name,
       'current_config_data' => $config->get(),
       'original_config_data' => $config->getOriginal(),
       'raw_config_data' => $config->getRawData()
-    ));
+    ]);
   }
 
   /**
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::SAVE][] = array('configEventRecorder');
-    $events[ConfigEvents::DELETE][] = array('configEventRecorder');
-    $events[ConfigEvents::RENAME][] = array('configEventRecorder');
+    $events[ConfigEvents::SAVE][] = ['configEventRecorder'];
+    $events[ConfigEvents::DELETE][] = ['configEventRecorder'];
+    $events[ConfigEvents::RENAME][] = ['configEventRecorder'];
     return $events;
   }
 
diff --git a/core/modules/config/tests/config_import_test/src/EventSubscriber.php b/core/modules/config/tests/config_import_test/src/EventSubscriber.php
index f4ae97f9647cf3fc64355616027c53b8b11b174e..e0ef923a390832243de28642e5cd3011bc5c3dc9 100644
--- a/core/modules/config/tests/config_import_test/src/EventSubscriber.php
+++ b/core/modules/config/tests/config_import_test/src/EventSubscriber.php
@@ -88,14 +88,14 @@ public function onConfigImporterMissingContentTwo(MissingContentEvent $event) {
   public function onConfigSave(ConfigCrudEvent $event) {
     $config = $event->getConfig();
     if ($config->getName() == 'action.settings') {
-      $values = $this->state->get('ConfigImportUITest.action.settings.recursion_limit', array());
+      $values = $this->state->get('ConfigImportUITest.action.settings.recursion_limit', []);
       $values[] = $config->get('recursion_limit');
       $this->state->set('ConfigImportUITest.action.settings.recursion_limit', $values);
     }
 
     if ($config->getName() == 'core.extension') {
-      $installed = $this->state->get('ConfigImportUITest.core.extension.modules_installed', array());
-      $uninstalled = $this->state->get('ConfigImportUITest.core.extension.modules_uninstalled', array());
+      $installed = $this->state->get('ConfigImportUITest.core.extension.modules_installed', []);
+      $uninstalled = $this->state->get('ConfigImportUITest.core.extension.modules_uninstalled', []);
       $original = $config->getOriginal('module');
       $data = $config->get('module');
       $install = array_diff_key($data, $original);
@@ -132,10 +132,10 @@ public function onConfigDelete(ConfigCrudEvent $event) {
    *   An array of event listener definitions.
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::SAVE][] = array('onConfigSave', 40);
-    $events[ConfigEvents::DELETE][] = array('onConfigDelete', 40);
-    $events[ConfigEvents::IMPORT_VALIDATE] = array('onConfigImporterValidate');
-    $events[ConfigEvents::IMPORT_MISSING_CONTENT] = array(array('onConfigImporterMissingContentOne'), array('onConfigImporterMissingContentTwo', -100));
+    $events[ConfigEvents::SAVE][] = ['onConfigSave', 40];
+    $events[ConfigEvents::DELETE][] = ['onConfigDelete', 40];
+    $events[ConfigEvents::IMPORT_VALIDATE] = ['onConfigImporterValidate'];
+    $events[ConfigEvents::IMPORT_MISSING_CONTENT] = [['onConfigImporterMissingContentOne'], ['onConfigImporterMissingContentTwo', -100]];
     return $events;
   }
 
diff --git a/core/modules/config/tests/config_override_test/src/ConfigOverrider.php b/core/modules/config/tests/config_override_test/src/ConfigOverrider.php
index 895f041b5b67da758176f17302a7a7b44d35b207..c8ffc694b3f23729c518866ebf076b39ca7a763d 100644
--- a/core/modules/config/tests/config_override_test/src/ConfigOverrider.php
+++ b/core/modules/config/tests/config_override_test/src/ConfigOverrider.php
@@ -14,13 +14,13 @@ class ConfigOverrider implements ConfigFactoryOverrideInterface {
    * {@inheritdoc}
    */
   public function loadOverrides($names) {
-    $overrides = array();
+    $overrides = [];
     if (!empty($GLOBALS['config_test_run_module_overrides'])) {
       if (in_array('system.site', $names)) {
-        $overrides = $overrides + array('system.site' => array('name' => 'ZOMG overridden site name'));
+        $overrides = $overrides + ['system.site' => ['name' => 'ZOMG overridden site name']];
       }
       if (in_array('config_override_test.new', $names)) {
-        $overrides = $overrides + array('config_override_test.new' => array('module' => 'override'));
+        $overrides = $overrides + ['config_override_test.new' => ['module' => 'override']];
       }
     }
     return $overrides;
diff --git a/core/modules/config/tests/config_override_test/src/ConfigOverriderLowPriority.php b/core/modules/config/tests/config_override_test/src/ConfigOverriderLowPriority.php
index 6f0b12d1efc463ee8e10fad99e34135774bb20ca..b8109db6826f826bb270ab27920618ba45079df9 100644
--- a/core/modules/config/tests/config_override_test/src/ConfigOverriderLowPriority.php
+++ b/core/modules/config/tests/config_override_test/src/ConfigOverriderLowPriority.php
@@ -15,17 +15,17 @@ class ConfigOverriderLowPriority implements ConfigFactoryOverrideInterface {
    * {@inheritdoc}
    */
   public function loadOverrides($names) {
-    $overrides = array();
+    $overrides = [];
     if (!empty($GLOBALS['config_test_run_module_overrides'])) {
       if (in_array('system.site', $names)) {
-        $overrides = array('system.site' =>
-          array(
+        $overrides = ['system.site' =>
+          [
             'name' => 'Should not apply because of higher priority listener',
             // This override should apply because it is not overridden by the
             // higher priority listener.
             'slogan' => 'Yay for overrides!',
-          )
-        );
+          ]
+        ];
       }
     }
     return $overrides;
diff --git a/core/modules/config/tests/config_test/src/ConfigTestController.php b/core/modules/config/tests/config_test/src/ConfigTestController.php
index d60c62e5cef775c87b806d8d67dec862d8348bf2..6799dc1b6f033efa98eac35c259d6e51f6594a17 100644
--- a/core/modules/config/tests/config_test/src/ConfigTestController.php
+++ b/core/modules/config/tests/config_test/src/ConfigTestController.php
@@ -21,7 +21,7 @@ class ConfigTestController extends ControllerBase {
    *   The title for the ConfigTest edit form.
    */
   public function editTitle(ConfigTest $config_test) {
-    return $this->t('Edit %label', array('%label' => $config_test->label()));
+    return $this->t('Edit %label', ['%label' => $config_test->label()]);
   }
 
   /**
@@ -35,7 +35,7 @@ public function editTitle(ConfigTest $config_test) {
    */
   function enable(ConfigTest $config_test) {
     $config_test->enable()->save();
-    return new RedirectResponse($config_test->url('collection', array('absolute' => TRUE)));
+    return new RedirectResponse($config_test->url('collection', ['absolute' => TRUE]));
   }
 
   /**
@@ -49,7 +49,7 @@ function enable(ConfigTest $config_test) {
    */
   function disable(ConfigTest $config_test) {
     $config_test->disable()->save();
-    return new RedirectResponse($config_test->url('collection', array('absolute' => TRUE)));
+    return new RedirectResponse($config_test->url('collection', ['absolute' => TRUE]));
   }
 
 }
diff --git a/core/modules/config/tests/config_test/src/ConfigTestForm.php b/core/modules/config/tests/config_test/src/ConfigTestForm.php
index 8384e6a66a02eaa692c7e70e7b899c15824ea7e8..6a56c3dfb1e9ed91bc7624a6bc5ddf39f7f8b052 100644
--- a/core/modules/config/tests/config_test/src/ConfigTestForm.php
+++ b/core/modules/config/tests/config_test/src/ConfigTestForm.php
@@ -18,33 +18,33 @@ public function form(array $form, FormStateInterface $form_state) {
     $form = parent::form($form, $form_state);
 
     $entity = $this->entity;
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => 'Label',
       '#default_value' => $entity->label(),
       '#required' => TRUE,
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
       '#default_value' => $entity->id(),
       '#required' => TRUE,
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => [$this, 'exists'],
         'replace_pattern' => '[^a-z0-9_.]+',
-      ),
-    );
-    $form['weight'] = array(
+      ],
+    ];
+    $form['weight'] = [
       '#type' => 'weight',
       '#title' => 'Weight',
       '#default_value' => $entity->get('weight'),
-    );
-    $form['style'] = array(
+    ];
+    $form['style'] = [
       '#type' => 'select',
       '#title' => 'Image style',
-      '#options' => array(),
+      '#options' => [],
       '#default_value' => $entity->get('style'),
       '#access' => FALSE,
-    );
+    ];
     if ($this->moduleHandler->moduleExists('image')) {
       $form['style']['#access'] = TRUE;
       $form['style']['#options'] = image_style_options();
@@ -55,61 +55,61 @@ public function form(array $form, FormStateInterface $form_state) {
     // state.
     $size = $entity->get('size');
 
-    $form['size_wrapper'] = array(
+    $form['size_wrapper'] = [
       '#type' => 'container',
-      '#attributes' => array(
+      '#attributes' => [
         'id' => 'size-wrapper',
-      ),
-    );
-    $form['size_wrapper']['size'] = array(
+      ],
+    ];
+    $form['size_wrapper']['size'] = [
       '#type' => 'select',
       '#title' => 'Size',
-      '#options' => array(
+      '#options' => [
         'custom' => 'Custom',
-      ),
+      ],
       '#empty_option' => '- None -',
       '#default_value' => $size,
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => '::updateSize',
         'wrapper' => 'size-wrapper',
-      ),
-    );
-    $form['size_wrapper']['size_submit'] = array(
+      ],
+    ];
+    $form['size_wrapper']['size_submit'] = [
       '#type' => 'submit',
       '#value' => t('Change size'),
-      '#attributes' => array(
-        'class' => array('js-hide'),
-      ),
-      '#submit' => array(array(get_class($this), 'changeSize')),
-    );
-    $form['size_wrapper']['size_value'] = array(
+      '#attributes' => [
+        'class' => ['js-hide'],
+      ],
+      '#submit' => [[get_class($this), 'changeSize']],
+    ];
+    $form['size_wrapper']['size_value'] = [
       '#type' => 'select',
       '#title' => 'Custom size value',
-      '#options' => array(
+      '#options' => [
         'small' => 'Small',
         'medium' => 'Medium',
         'large' => 'Large',
-      ),
+      ],
       '#default_value' => $entity->get('size_value'),
       '#access' => !empty($size),
-    );
+    ];
 
-    $form['langcode'] = array(
+    $form['langcode'] = [
       '#type' => 'language_select',
       '#title' => t('Language'),
       '#languages' => LanguageInterface::STATE_ALL,
       '#default_value' => $entity->language()->getId(),
-    );
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save',
-    );
-    $form['actions']['delete'] = array(
+    ];
+    $form['actions']['delete'] = [
       '#type' => 'submit',
       '#value' => 'Delete',
-    );
+    ];
 
     return $form;
   }
@@ -136,10 +136,10 @@ public function save(array $form, FormStateInterface $form_state) {
     $status = $entity->save();
 
     if ($status === SAVED_UPDATED) {
-      drupal_set_message(format_string('%label configuration has been updated.', array('%label' => $entity->label())));
+      drupal_set_message(format_string('%label configuration has been updated.', ['%label' => $entity->label()]));
     }
     else {
-      drupal_set_message(format_string('%label configuration has been created.', array('%label' => $entity->label())));
+      drupal_set_message(format_string('%label configuration has been created.', ['%label' => $entity->label()]));
     }
 
     $form_state->setRedirectUrl($this->entity->urlInfo('collection'));
diff --git a/core/modules/config/tests/config_test/src/Entity/ConfigQueryTest.php b/core/modules/config/tests/config_test/src/Entity/ConfigQueryTest.php
index 10914f0196416c5a873a92a924361472d151373b..ca3b354984dbb3d4d8b88b278fe2a9566bd864f6 100644
--- a/core/modules/config/tests/config_test/src/Entity/ConfigQueryTest.php
+++ b/core/modules/config/tests/config_test/src/Entity/ConfigQueryTest.php
@@ -38,6 +38,6 @@ class ConfigQueryTest extends ConfigTest {
    *
    * @var array
    */
-  public $array = array();
+  public $array = [];
 
 }
diff --git a/core/modules/config/tests/config_test/src/Entity/ConfigTest.php b/core/modules/config/tests/config_test/src/Entity/ConfigTest.php
index f19eb65ae2262fcd9d1283be8f87b9368b9212fc..1bd1d8dee9b7b732c70b0522fec3e14d346630b7 100644
--- a/core/modules/config/tests/config_test/src/Entity/ConfigTest.php
+++ b/core/modules/config/tests/config_test/src/Entity/ConfigTest.php
@@ -88,10 +88,10 @@ public static function sort(ConfigEntityInterface $a, ConfigEntityInterface $b)
   public function postSave(EntityStorageInterface $storage, $update = TRUE) {
     // Used to test secondary writes during config sync.
     if ($this->id() == 'primary') {
-      $secondary = $storage->create(array(
+      $secondary = $storage->create([
         'id' => 'secondary',
         'label' => 'Secondary Default',
-      ));
+      ]);
       $secondary->save();
     }
     if ($this->id() == 'deleter') {
@@ -126,7 +126,7 @@ public function onDependencyRemoval(array $dependencies) {
     if (!isset($this->dependencies['enforced']['config'])) {
       return $changed;
     }
-    $fix_deps = \Drupal::state()->get('config_test.fix_dependencies', array());
+    $fix_deps = \Drupal::state()->get('config_test.fix_dependencies', []);
     foreach ($dependencies['config'] as $entity) {
       if (in_array($entity->getConfigDependencyName(), $fix_deps)) {
         $key = array_search($entity->getConfigDependencyName(), $this->dependencies['enforced']['config']);
diff --git a/core/modules/config/tests/config_test/src/TestInstallStorage.php b/core/modules/config/tests/config_test/src/TestInstallStorage.php
index 074e99ca611db48a896bf7dc7423877fa2dc4289..e3c4918df40dcfc2b3cc6d2b4e71ce5254b4f747 100644
--- a/core/modules/config/tests/config_test/src/TestInstallStorage.php
+++ b/core/modules/config/tests/config_test/src/TestInstallStorage.php
@@ -20,7 +20,7 @@ protected function getAllFolders() {
     if (!isset($this->folders)) {
       $this->folders = $this->getCoreNames();
       $listing = new ExtensionDiscovery(\Drupal::root());
-      $listing->setProfileDirectories(array());
+      $listing->setProfileDirectories([]);
       $this->folders += $this->getComponentNames($listing->scan('profile'));
       $this->folders += $this->getComponentNames($listing->scan('module'));
       $this->folders += $this->getComponentNames($listing->scan('theme'));
diff --git a/core/modules/config/tests/src/Functional/ConfigDependencyWebTest.php b/core/modules/config/tests/src/Functional/ConfigDependencyWebTest.php
index c243e9ac2273cb08fcdd94ecacdbf13f3769704b..ba80401bc4d94b3c16f9a7a9881243c03fb6c9ca 100644
--- a/core/modules/config/tests/src/Functional/ConfigDependencyWebTest.php
+++ b/core/modules/config/tests/src/Functional/ConfigDependencyWebTest.php
@@ -22,7 +22,7 @@ class ConfigDependencyWebTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Tests ConfigDependencyDeleteFormTrait.
@@ -36,10 +36,10 @@ function testConfigDependencyDeleteFormTrait() {
     $storage = $this->container->get('entity.manager')->getStorage('config_test');
     // Entity1 will be deleted by the test.
     $entity1 = $storage->create(
-      array(
+      [
         'id' => 'entity1',
         'label' => 'Entity One',
-      )
+      ]
     );
     $entity1->save();
 
@@ -47,14 +47,14 @@ function testConfigDependencyDeleteFormTrait() {
     // \Drupal\config_test\Entity::onDependencyRemoval() will remove the
     // dependency before config entities are deleted.
     $entity2 = $storage->create(
-      array(
+      [
         'id' => 'entity2',
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity1->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity1->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity2->save();
 
@@ -65,47 +65,47 @@ function testConfigDependencyDeleteFormTrait() {
     $this->assertNoText(t('Configuration updates'), 'No configuration updates found.');
     $this->assertText(t('Configuration deletions'), 'Configuration deletions found.');
     $this->assertText($entity2->id(), 'Entity2 id found');
-    $this->drupalPostForm($entity1->urlInfo('delete-form'), array(), 'Delete');
+    $this->drupalPostForm($entity1->urlInfo('delete-form'), [], 'Delete');
     $storage->resetCache();
     $this->assertFalse($storage->loadMultiple([$entity1->id(), $entity2->id()]), 'Test entities deleted');
 
     // Set a more complicated test where dependencies will be fixed.
     // Entity1 will be deleted by the test.
     $entity1 = $storage->create(
-      array(
+      [
         'id' => 'entity1',
-      )
+      ]
     );
     $entity1->save();
-    \Drupal::state()->set('config_test.fix_dependencies', array($entity1->getConfigDependencyName()));
+    \Drupal::state()->set('config_test.fix_dependencies', [$entity1->getConfigDependencyName()]);
 
     // Entity2 has a dependency on Entity1 but it can be fixed because
     // \Drupal\config_test\Entity::onDependencyRemoval() will remove the
     // dependency before config entities are deleted.
     $entity2 = $storage->create(
-      array(
+      [
         'id' => 'entity2',
         'label' => 'Entity Two',
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity1->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity1->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity2->save();
 
     // Entity3 will be unchanged because it is dependent on Entity2 which can
     // be fixed.
     $entity3 = $storage->create(
-      array(
+      [
         'id' => 'entity3',
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity2->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity2->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity3->save();
 
@@ -115,12 +115,12 @@ function testConfigDependencyDeleteFormTrait() {
     $this->assertNoText($entity2->id(), 'Entity2 id not found');
     $this->assertText($entity2->label(), 'Entity2 label not found');
     $this->assertNoText($entity3->id(), 'Entity3 id not found');
-    $this->drupalPostForm($entity1->urlInfo('delete-form'), array(), 'Delete');
+    $this->drupalPostForm($entity1->urlInfo('delete-form'), [], 'Delete');
     $storage->resetCache();
     $this->assertFalse($storage->load('entity1'), 'Test entity 1 deleted');
     $entity2 = $storage->load('entity2');
     $this->assertTrue($entity2, 'Entity 2 not deleted');
-    $this->assertEqual($entity2->calculateDependencies()->getDependencies()['config'], array(), 'Entity 2 dependencies updated to remove dependency on Entity1.');
+    $this->assertEqual($entity2->calculateDependencies()->getDependencies()['config'], [], 'Entity 2 dependencies updated to remove dependency on Entity1.');
     $entity3 = $storage->load('entity3');
     $this->assertTrue($entity3, 'Entity 3 not deleted');
     $this->assertEqual($entity3->calculateDependencies()->getDependencies()['config'], [$entity2->getConfigDependencyName()], 'Entity 3 still depends on Entity 2.');
diff --git a/core/modules/config/tests/src/Functional/ConfigDraggableListBuilderTest.php b/core/modules/config/tests/src/Functional/ConfigDraggableListBuilderTest.php
index 417e9f13cbf9546876e1a65f4d1ea3514c1a82c7..74829359a108620222279601ecf4af7c3c0e9521 100644
--- a/core/modules/config/tests/src/Functional/ConfigDraggableListBuilderTest.php
+++ b/core/modules/config/tests/src/Functional/ConfigDraggableListBuilderTest.php
@@ -15,13 +15,13 @@ class ConfigDraggableListBuilderTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Test draggable lists.
    */
   public function testDraggableList() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer permissions')));
+    $this->drupalLogin($this->drupalCreateUser(['administer permissions']));
 
     // Create more than 50 roles.
     for ($i = 0; $i < 51; $i++) {
diff --git a/core/modules/config/tests/src/Functional/ConfigEntityListMultilingualTest.php b/core/modules/config/tests/src/Functional/ConfigEntityListMultilingualTest.php
index 6c40dedcd6ff55130a335ac381993fbe33dac193..5d99252d9c94a8a00c2248819fb0d83b4c7b097e 100644
--- a/core/modules/config/tests/src/Functional/ConfigEntityListMultilingualTest.php
+++ b/core/modules/config/tests/src/Functional/ConfigEntityListMultilingualTest.php
@@ -17,7 +17,7 @@ class ConfigEntityListMultilingualTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test', 'language', 'block');
+  public static $modules = ['config_test', 'language', 'block'];
 
   /**
    * {@inheritdoc}
@@ -36,7 +36,7 @@ protected function setUp() {
    */
   function testListUI() {
     // Log in as an administrative user to access the full menu trail.
-    $this->drupalLogin($this->drupalCreateUser(array('access administration pages', 'administer site configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer site configuration']));
 
     // Get the list page.
     $this->drupalGet('admin/structure/config_test');
@@ -44,11 +44,11 @@ function testListUI() {
 
     // Add a new entity using the action link.
     $this->clickLink('Add test configuration');
-    $edit = array(
+    $edit = [
       'label' => 'Antilop',
       'id' => 'antilop',
       'langcode' => 'hu',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     // Ensure that operations for editing the Hungarian entity appear in English.
     $this->assertLinkByHref('admin/structure/config_test/manage/antilop');
diff --git a/core/modules/config/tests/src/Functional/ConfigEntityStatusUITest.php b/core/modules/config/tests/src/Functional/ConfigEntityStatusUITest.php
index 9ae94125477bac174278c9ece31d6fe8206fdd04..4ad4d59b9d2df47db0ea8f7e87615e63ccf48c7c 100644
--- a/core/modules/config/tests/src/Functional/ConfigEntityStatusUITest.php
+++ b/core/modules/config/tests/src/Functional/ConfigEntityStatusUITest.php
@@ -16,7 +16,7 @@ class ConfigEntityStatusUITest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Tests status operations.
@@ -25,10 +25,10 @@ function testCRUD() {
     $this->drupalLogin($this->drupalCreateUser(['administer site configuration']));
 
     $id = strtolower($this->randomMachineName());
-    $edit = array(
+    $edit = [
       'id' => $id,
       'label' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('admin/structure/config_test/add', $edit, 'Save');
 
     $entity = entity_load('config_test', $id);
diff --git a/core/modules/config/tests/src/Functional/ConfigInstallProfileOverrideTest.php b/core/modules/config/tests/src/Functional/ConfigInstallProfileOverrideTest.php
index 9ed75a4e9359cc49a1d11ab209c1204d5d1fd07a..88218b9899f29eb9610776ef4a489afd4f1f7835 100644
--- a/core/modules/config/tests/src/Functional/ConfigInstallProfileOverrideTest.php
+++ b/core/modules/config/tests/src/Functional/ConfigInstallProfileOverrideTest.php
@@ -31,21 +31,21 @@ class ConfigInstallProfileOverrideTest extends BrowserTestBase {
   function testInstallProfileConfigOverwrite() {
     $config_name = 'system.cron';
     // The expected configuration from the system module.
-    $expected_original_data = array(
-      'threshold' => array(
+    $expected_original_data = [
+      'threshold' => [
         'requirements_warning' => 172800,
         'requirements_error' => 1209600,
-      ),
+      ],
       'logging' => 1,
-    );
+    ];
     // The expected active configuration altered by the install profile.
-    $expected_profile_data = array(
-      'threshold' => array(
+    $expected_profile_data = [
+      'threshold' => [
         'requirements_warning' => 259200,
         'requirements_error' => 1209600,
-      ),
+      ],
       'logging' => 1,
-    );
+    ];
     $expected_profile_data['_core']['default_config_hash'] = Crypt::hashBase64(serialize($expected_profile_data));
 
     // Verify that the original data matches. We have to read the module config
diff --git a/core/modules/config/tests/src/Functional/ConfigLanguageOverrideWebTest.php b/core/modules/config/tests/src/Functional/ConfigLanguageOverrideWebTest.php
index 5aa194edcf39342a5cbaada74edd06170dd667f8..5fdd1a1441758dc97a5008b5fee92e43c4671166 100644
--- a/core/modules/config/tests/src/Functional/ConfigLanguageOverrideWebTest.php
+++ b/core/modules/config/tests/src/Functional/ConfigLanguageOverrideWebTest.php
@@ -35,18 +35,18 @@ protected function setUp() {
    * Tests translating the site name.
    */
   function testSiteNameTranslation() {
-    $adminUser = $this->drupalCreateUser(array('administer site configuration', 'administer languages'));
+    $adminUser = $this->drupalCreateUser(['administer site configuration', 'administer languages']);
     $this->drupalLogin($adminUser);
 
     // Add a custom language.
     $langcode = 'xx';
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     \Drupal::languageManager()
       ->getLanguageConfigOverride($langcode, 'system.site')
diff --git a/core/modules/config/tests/src/Functional/ConfigOtherModuleTest.php b/core/modules/config/tests/src/Functional/ConfigOtherModuleTest.php
index e1d0d8d5be73327430d7c9fe7dea7b7fa4c195ee..a99676072b576c40ad571a241ec4d85b65b3a2f3 100644
--- a/core/modules/config/tests/src/Functional/ConfigOtherModuleTest.php
+++ b/core/modules/config/tests/src/Functional/ConfigOtherModuleTest.php
@@ -87,14 +87,14 @@ public function testInstallConfigEntityModuleFirst() {
   public function testUninstall() {
     $this->installModule('views');
     $storage = $this->container->get('entity_type.manager')->getStorage('view');
-    $storage->resetCache(array('frontpage'));
+    $storage->resetCache(['frontpage']);
     $this->assertTrue($storage->load('frontpage') === NULL, 'After installing Views, frontpage view which is dependant on the Node and Views modules does not exist.');
     $this->installModule('node');
-    $storage->resetCache(array('frontpage'));
+    $storage->resetCache(['frontpage']);
     $this->assertTrue($storage->load('frontpage') !== NULL, 'After installing Node, frontpage view which is dependant on the Node and Views modules exists.');
     $this->uninstallModule('node');
     $storage = $this->container->get('entity_type.manager')->getStorage('view');
-    $storage->resetCache(array('frontpage'));
+    $storage->resetCache(['frontpage']);
     $this->assertTrue($storage->load('frontpage') === NULL, 'After uninstalling Node, frontpage view which is dependant on the Node and Views modules does not exist.');
   }
 
@@ -105,7 +105,7 @@ public function testUninstall() {
    *   The module name.
    */
   protected function installModule($module) {
-    $this->container->get('module_installer')->install(array($module));
+    $this->container->get('module_installer')->install([$module]);
     $this->container = \Drupal::getContainer();
   }
 
@@ -116,7 +116,7 @@ protected function installModule($module) {
    *   The module name.
    */
   protected function uninstallModule($module) {
-    $this->container->get('module_installer')->uninstall(array($module));
+    $this->container->get('module_installer')->uninstall([$module]);
     $this->container = \Drupal::getContainer();
   }
 
diff --git a/core/modules/config/tests/src/Functional/SchemaConfigListenerWebTest.php b/core/modules/config/tests/src/Functional/SchemaConfigListenerWebTest.php
index bab8a3e9baadba04912ba3f055d04666e40f2304..189d78fc6371a8514054ac8ad316a7ca66869289 100644
--- a/core/modules/config/tests/src/Functional/SchemaConfigListenerWebTest.php
+++ b/core/modules/config/tests/src/Functional/SchemaConfigListenerWebTest.php
@@ -15,7 +15,7 @@ class SchemaConfigListenerWebTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Tests \Drupal\Core\Config\Development\ConfigSchemaChecker.
diff --git a/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php b/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
index 7dd8d7dac82a591613819b4e547c63fd746806c2..0bfb32e93fd7f3a08955ce1a2359d347440af2cd 100644
--- a/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
+++ b/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
@@ -12,7 +12,7 @@
 class ConfigLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array('config' => 'core/modules/config');
+    $this->directoryList = ['config' => 'core/modules/config'];
     parent::setUp();
   }
 
@@ -29,13 +29,13 @@ public function testConfigAdminLocalTasks($route, $expected) {
    * Provides a list of routes to test.
    */
   public function getConfigAdminRoutes() {
-    return array(
-      array('config.sync', array(array('config.sync', 'config.import', 'config.export'))),
-      array('config.import_full', array(array('config.sync', 'config.import', 'config.export'), array('config.import_full', 'config.import_single'))),
-      array('config.import_single', array(array('config.sync', 'config.import', 'config.export'), array('config.import_full', 'config.import_single'))),
-      array('config.export_full', array(array('config.sync', 'config.import', 'config.export'), array('config.export_full', 'config.export_single'))),
-      array('config.export_single', array(array('config.sync', 'config.import', 'config.export'), array('config.export_full', 'config.export_single'))),
-    );
+    return [
+      ['config.sync', [['config.sync', 'config.import', 'config.export']]],
+      ['config.import_full', [['config.sync', 'config.import', 'config.export'], ['config.import_full', 'config.import_single']]],
+      ['config.import_single', [['config.sync', 'config.import', 'config.export'], ['config.import_full', 'config.import_single']]],
+      ['config.export_full', [['config.sync', 'config.import', 'config.export'], ['config.export_full', 'config.export_single']]],
+      ['config.export_single', [['config.sync', 'config.import', 'config.export'], ['config.export_full', 'config.export_single']]],
+    ];
   }
 
 }
diff --git a/core/modules/config_translation/config_translation.api.php b/core/modules/config_translation/config_translation.api.php
index f2ee4a290f0a3af3a7dffa27c203c9e17582fcc7..f97e25997ad9a266f66cb4b8767e5086ae5a5fae 100644
--- a/core/modules/config_translation/config_translation.api.php
+++ b/core/modules/config_translation/config_translation.api.php
@@ -50,14 +50,14 @@ function hook_config_translation_info(&$info) {
 
       // Make sure entity type has field UI enabled and has a base route.
       if ($entity_type->get('field_ui_base_route') && !empty($base_route)) {
-        $info[$entity_type_id . '_fields'] = array(
+        $info[$entity_type_id . '_fields'] = [
           'base_route_name' => 'entity.field_config.' . $entity_type_id . '_field_edit_form',
           'entity_type' => 'field_config',
           'title' => t('Title'),
           'class' => '\Drupal\config_translation\ConfigFieldMapper',
           'base_entity_type' => $entity_type_id,
           'weight' => 10,
-        );
+        ];
       }
     }
   }
diff --git a/core/modules/config_translation/config_translation.module b/core/modules/config_translation/config_translation.module
index d018d6402b1ccdbbb232d7aa920a9ceb99676c83..344d90e27b10e83ba6f28148c23691fa62279820 100644
--- a/core/modules/config_translation/config_translation.module
+++ b/core/modules/config_translation/config_translation.module
@@ -18,15 +18,15 @@ function config_translation_help($route_name, RouteMatchInterface $route_match)
     case 'help.page.config_translation':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Configuration Translation module allows you to translate configuration text; for example, the site name, vocabularies, menus, or date formats. Together with the modules <a href=":language">Language</a>, <a href=":content-translation">Content Translation</a>, and <a href=":locale">Interface Translation</a>, it allows you to build multilingual websites. For more information, see the <a href=":doc_url">online documentation for the Configuration Translation module</a>.', array(':doc_url' => 'https://www.drupal.org/documentation/modules/config_translation', ':config' => \Drupal::url('help.page', array('name' => 'config')), ':language' => \Drupal::url('help.page', array('name' => 'language')), ':locale' => \Drupal::url('help.page', array('name' => 'locale')), ':content-translation' => (\Drupal::moduleHandler()->moduleExists('content_translation')) ? \Drupal::url('help.page', array('name' => 'content_translation')) : '#')) . '</p>';
+      $output .= '<p>' . t('The Configuration Translation module allows you to translate configuration text; for example, the site name, vocabularies, menus, or date formats. Together with the modules <a href=":language">Language</a>, <a href=":content-translation">Content Translation</a>, and <a href=":locale">Interface Translation</a>, it allows you to build multilingual websites. For more information, see the <a href=":doc_url">online documentation for the Configuration Translation module</a>.', [':doc_url' => 'https://www.drupal.org/documentation/modules/config_translation', ':config' => \Drupal::url('help.page', ['name' => 'config']), ':language' => \Drupal::url('help.page', ['name' => 'language']), ':locale' => \Drupal::url('help.page', ['name' => 'locale']), ':content-translation' => (\Drupal::moduleHandler()->moduleExists('content_translation')) ? \Drupal::url('help.page', ['name' => 'content_translation']) : '#']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Enabling translation') . '</dt>';
-      $output .= '<dd>' . t('In order to translate configuration, the website must have at least two <a href=":url">languages</a>.', array(':url' => \Drupal::url('entity.configurable_language.collection'))) . '</dd>';
+      $output .= '<dd>' . t('In order to translate configuration, the website must have at least two <a href=":url">languages</a>.', [':url' => \Drupal::url('entity.configurable_language.collection')]) . '</dd>';
       $output .= '<dt>' . t('Translating configuration text') . '</dt>';
-      $output .= '<dd>' . t('Users with the <em>Translate user edited configuration</em> permission can access the configuration translation overview, and manage translations for specific languages. The <a href=":translation-page">Configuration translation</a> page shows a list of all configuration text that can be translated, either as individual items or as lists. After you click on <em>Translate</em>, you are provided with a list of all languages. You can <em>add</em> or <em>edit</em> a translation for a specific language. Users with specific configuration permissions can also <em>edit</em> the text for the site\'s default language. For some configuration text items (for example for the site information), the specific translation pages can also be accessed directly from their configuration pages.', array(':translation-page' => \Drupal::url('config_translation.mapper_list'))) . '</dd>';
+      $output .= '<dd>' . t('Users with the <em>Translate user edited configuration</em> permission can access the configuration translation overview, and manage translations for specific languages. The <a href=":translation-page">Configuration translation</a> page shows a list of all configuration text that can be translated, either as individual items or as lists. After you click on <em>Translate</em>, you are provided with a list of all languages. You can <em>add</em> or <em>edit</em> a translation for a specific language. Users with specific configuration permissions can also <em>edit</em> the text for the site\'s default language. For some configuration text items (for example for the site information), the specific translation pages can also be accessed directly from their configuration pages.', [':translation-page' => \Drupal::url('config_translation.mapper_list')]) . '</dd>';
       $output .= '<dt>' . t('Translating date formats') . '</dt>';
-      $output .= '<dd>' . t('You can choose to translate date formats on the <a href=":translation-page">Configuration translation</a> page. This allows you not only to translate the label text, but also to set a language-specific <em>PHP date format</em>.', array(':translation-page' => \Drupal::url('config_translation.mapper_list'))) . '</dd>';
+      $output .= '<dd>' . t('You can choose to translate date formats on the <a href=":translation-page">Configuration translation</a> page. This allows you not only to translate the label text, but also to set a language-specific <em>PHP date format</em>.', [':translation-page' => \Drupal::url('config_translation.mapper_list')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -40,12 +40,12 @@ function config_translation_help($route_name, RouteMatchInterface $route_match)
  * Implements hook_theme().
  */
 function config_translation_theme() {
-  return array(
-    'config_translation_manage_form_element' => array(
+  return [
+    'config_translation_manage_form_element' => [
       'render element' => 'element',
       'template' => 'config_translation_manage_form_element',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -110,13 +110,13 @@ function config_translation_config_translation_info(&$info) {
     foreach ($entity_manager->getDefinitions() as $entity_type_id => $entity_type) {
       // Make sure entity type has field UI enabled and has a base route.
       if ($entity_type->get('field_ui_base_route')) {
-        $info[$entity_type_id . '_fields'] = array(
+        $info[$entity_type_id . '_fields'] = [
           'base_route_name' => "entity.field_config.{$entity_type_id}_field_edit_form",
           'entity_type' => 'field_config',
           'class' => '\Drupal\config_translation\ConfigFieldMapper',
           'base_entity_type' => $entity_type_id,
           'weight' => 10,
-        );
+        ];
       }
     }
   }
@@ -138,14 +138,14 @@ function config_translation_config_translation_info(&$info) {
 
     // Use the entity type as the plugin ID.
     $base_route_name = "entity.$entity_type_id.edit_form";
-    $info[$entity_type_id] = array(
+    $info[$entity_type_id] = [
       'class' => '\Drupal\config_translation\ConfigEntityMapper',
       'base_route_name' => $base_route_name,
       'title' => $entity_type->getLowercaseLabel(),
-      'names' => array(),
+      'names' => [],
       'entity_type' => $entity_type_id,
       'weight' => 10,
-    );
+    ];
   }
 }
 
@@ -153,7 +153,7 @@ function config_translation_config_translation_info(&$info) {
  * Implements hook_entity_operation().
  */
 function config_translation_entity_operation(EntityInterface $entity) {
-  $operations = array();
+  $operations = [];
   $entity_type = $entity->getEntityType();
   if ($entity_type->entityClassImplements(ConfigEntityInterface::class) &&
     $entity->hasLinkTemplate('config-translation-overview') &&
@@ -164,11 +164,11 @@ function config_translation_entity_operation(EntityInterface $entity) {
       $link_template = "config-translation-overview.{$entity->getTargetEntityTypeId()}";
     }
 
-    $operations['translate'] = array(
+    $operations['translate'] = [
       'title' => t('Translate'),
       'weight' => 50,
       'url' => $entity->urlInfo($link_template),
-    );
+    ];
   }
 
   return $operations;
@@ -178,7 +178,7 @@ function config_translation_entity_operation(EntityInterface $entity) {
  * Implements hook_config_schema_info_alter().
  */
 function config_translation_config_schema_info_alter(&$definitions) {
-  $map = array(
+  $map = [
     'label' => '\Drupal\config_translation\FormElement\Textfield',
     'text' => '\Drupal\config_translation\FormElement\Textarea',
     'date_format' => '\Drupal\config_translation\FormElement\DateFormat',
@@ -186,7 +186,7 @@ function config_translation_config_schema_info_alter(&$definitions) {
     'mapping' => '\Drupal\config_translation\FormElement\ListElement',
     'sequence' => '\Drupal\config_translation\FormElement\ListElement',
     'plural_label' => '\Drupal\config_translation\FormElement\PluralVariants',
-  );
+  ];
 
   // Enhance the text and date type definitions with classes to generate proper
   // form elements in ConfigTranslationFormBase. Other translatable types will
diff --git a/core/modules/config_translation/src/ConfigEntityMapper.php b/core/modules/config_translation/src/ConfigEntityMapper.php
index d172e1b7050814e98daf0d8f3e82b9ed208339c2..2ae30959332d6e37ce67b87d377d6bcacebbd6bb 100644
--- a/core/modules/config_translation/src/ConfigEntityMapper.php
+++ b/core/modules/config_translation/src/ConfigEntityMapper.php
@@ -165,7 +165,7 @@ public function getTitle() {
    * {@inheritdoc}
    */
   public function getBaseRouteParameters() {
-    return array($this->entityType => $this->entity->id());
+    return [$this->entityType => $this->entity->id()];
   }
 
   /**
@@ -220,14 +220,14 @@ public function getTypeLabel() {
    * {@inheritdoc}
    */
   public function getOperations() {
-    return array(
-      'list' => array(
+    return [
+      'list' => [
         'title' => $this->t('List'),
         'url' => Url::fromRoute('config_translation.entity_list', [
           'mapper_id' => $this->getPluginId(),
         ]),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -259,12 +259,12 @@ public function getOverviewRouteName() {
    */
   protected function processRoute(Route $route) {
     // Add entity upcasting information.
-    $parameters = $route->getOption('parameters') ?: array();
-    $parameters += array(
-      $this->entityType => array(
+    $parameters = $route->getOption('parameters') ?: [];
+    $parameters += [
+      $this->entityType => [
         'type' => 'entity:' . $this->entityType,
-      )
-    );
+      ]
+    ];
     $route->setOption('parameters', $parameters);
   }
 
diff --git a/core/modules/config_translation/src/ConfigFieldMapper.php b/core/modules/config_translation/src/ConfigFieldMapper.php
index a9f6d76621b6cf708412b476fee7f67790e23a2f..c0e085f11537ef3e131c1960bf881c95afbd21e5 100644
--- a/core/modules/config_translation/src/ConfigFieldMapper.php
+++ b/core/modules/config_translation/src/ConfigFieldMapper.php
@@ -44,7 +44,7 @@ public function getOverviewRouteName() {
    */
   public function getTypeLabel() {
     $base_entity_info = $this->entityManager->getDefinition($this->pluginDefinition['base_entity_type']);
-    return $this->t('@label fields', array('@label' => $base_entity_info->getLabel()));
+    return $this->t('@label fields', ['@label' => $base_entity_info->getLabel()]);
   }
 
   /**
diff --git a/core/modules/config_translation/src/ConfigMapperManager.php b/core/modules/config_translation/src/ConfigMapperManager.php
index cd0b72f967d4b3a5b31f12301d82f67de275eeb6..a43f08083a5422d12e0cef550f917e88e557f0ae 100644
--- a/core/modules/config_translation/src/ConfigMapperManager.php
+++ b/core/modules/config_translation/src/ConfigMapperManager.php
@@ -39,12 +39,12 @@ class ConfigMapperManager extends DefaultPluginManager implements ConfigMapperMa
   /**
    * {@inheritdoc}
    */
-  protected $defaults = array(
+  protected $defaults = [
     'title' => '',
-    'names' => array(),
+    'names' => [],
     'weight' => 20,
     'class' => '\Drupal\config_translation\ConfigNamesMapper',
-  );
+  ];
 
   /**
    * Constructs a ConfigMapperManager.
@@ -72,7 +72,7 @@ public function __construct(CacheBackendInterface $cache_backend, LanguageManage
     $this->alterInfo('config_translation_info');
     // Config translation only uses an info hook discovery, cache by language.
     $cache_key = 'config_translation_info_plugins' . ':' . $language_manager->getCurrentLanguage()->getId();
-    $this->setCacheBackend($cache_backend, $cache_key, array('config_translation_info_plugins'));
+    $this->setCacheBackend($cache_backend, $cache_key, ['config_translation_info_plugins']);
   }
 
   /**
@@ -90,7 +90,7 @@ protected function getDiscovery() {
       //   request; when routes are being rebuilt at the end of the request,
       //   this service only happens to get instantiated with the updated list
       //   of installed themes.
-      $directories = array();
+      $directories = [];
       foreach ($this->moduleHandler->getModuleList() as $name => $module) {
         $directories[$name] = $module->getPath();
       }
@@ -111,7 +111,7 @@ protected function getDiscovery() {
    * {@inheritdoc}
    */
   public function getMappers(RouteCollection $collection = NULL) {
-    $mappers = array();
+    $mappers = [];
     foreach ($this->getDefinitions() as $id => $definition) {
       $mappers[$id] = $this->createInstance($id);
       if ($collection) {
@@ -155,7 +155,7 @@ protected function findDefinitions() {
     // If this plugin was provided by a module that does not exist, remove the
     // plugin definition.
     foreach ($definitions as $plugin_id => $plugin_definition) {
-      if (isset($plugin_definition['provider']) && !in_array($plugin_definition['provider'], array('core', 'component')) && (!$this->moduleHandler->moduleExists($plugin_definition['provider']) && !in_array($plugin_definition['provider'], array_keys($this->themeHandler->listInfo())))) {
+      if (isset($plugin_definition['provider']) && !in_array($plugin_definition['provider'], ['core', 'component']) && (!$this->moduleHandler->moduleExists($plugin_definition['provider']) && !in_array($plugin_definition['provider'], array_keys($this->themeHandler->listInfo())))) {
         unset($definitions[$plugin_id]);
       }
     }
diff --git a/core/modules/config_translation/src/ConfigNamesMapper.php b/core/modules/config_translation/src/ConfigNamesMapper.php
index 0784090daf5921a7ec14f56ff4421ac0ad2d22c9..03716e9725c53772cf45ebbc851b239e70cb18ae 100644
--- a/core/modules/config_translation/src/ConfigNamesMapper.php
+++ b/core/modules/config_translation/src/ConfigNamesMapper.php
@@ -180,7 +180,7 @@ public function getBaseRouteName() {
    * {@inheritdoc}
    */
   public function getBaseRouteParameters() {
-    return array();
+    return [];
   }
 
   /**
@@ -231,11 +231,11 @@ public function getOverviewRouteParameters() {
   public function getOverviewRoute() {
     $route = new Route(
       $this->getBaseRoute()->getPath() . '/translate',
-      array(
+      [
         '_controller' => '\Drupal\config_translation\Controller\ConfigTranslationController::itemPage',
         'plugin_id' => $this->getPluginId(),
-      ),
-      array('_config_translation_overview_access' => 'TRUE')
+      ],
+      ['_config_translation_overview_access' => 'TRUE']
     );
     $this->processRoute($route);
     return $route;
@@ -272,11 +272,11 @@ public function getAddRouteParameters() {
   public function getAddRoute() {
     $route = new Route(
       $this->getBaseRoute()->getPath() . '/translate/{langcode}/add',
-      array(
+      [
         '_form' => '\Drupal\config_translation\Form\ConfigTranslationAddForm',
         'plugin_id' => $this->getPluginId(),
-      ),
-      array('_config_translation_form_access' => 'TRUE')
+      ],
+      ['_config_translation_form_access' => 'TRUE']
     );
     $this->processRoute($route);
     return $route;
@@ -302,11 +302,11 @@ public function getEditRouteParameters() {
   public function getEditRoute() {
     $route = new Route(
       $this->getBaseRoute()->getPath() . '/translate/{langcode}/edit',
-      array(
+      [
         '_form' => '\Drupal\config_translation\Form\ConfigTranslationEditForm',
         'plugin_id' => $this->getPluginId(),
-      ),
-      array('_config_translation_form_access' => 'TRUE')
+      ],
+      ['_config_translation_form_access' => 'TRUE']
     );
     $this->processRoute($route);
     return $route;
@@ -332,11 +332,11 @@ public function getDeleteRouteParameters() {
   public function getDeleteRoute() {
     $route = new Route(
       $this->getBaseRoute()->getPath() . '/translate/{langcode}/delete',
-      array(
+      [
         '_form' => '\Drupal\config_translation\Form\ConfigTranslationDeleteForm',
         'plugin_id' => $this->getPluginId(),
-      ),
-      array('_config_translation_form_access' => 'TRUE')
+      ],
+      ['_config_translation_form_access' => 'TRUE']
     );
     $this->processRoute($route);
     return $route;
@@ -413,7 +413,7 @@ public function setLangcode($langcode) {
    * {@inheritdoc}
    */
   public function getConfigData() {
-    $config_data = array();
+    $config_data = [];
     foreach ($this->getConfigNames() as $name) {
       $config_data[$name] = $this->configFactory->getEditable($name)->get();
     }
@@ -467,12 +467,12 @@ public function getTypeName() {
    * {@inheritdoc}
    */
   public function getOperations() {
-    return array(
-      'translate' => array(
+    return [
+      'translate' => [
         'title' => $this->t('Translate'),
         'url' => Url::fromRoute($this->getOverviewRouteName(), $this->getOverviewRouteParameters()),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/config_translation/src/Controller/ConfigTranslationBlockListBuilder.php b/core/modules/config_translation/src/Controller/ConfigTranslationBlockListBuilder.php
index d0de3419ba83e755acd9c6f6ca0a8b1229510070..c226dfbd60a7ae9016e32d4c6183d2f3e9b7a26b 100644
--- a/core/modules/config_translation/src/Controller/ConfigTranslationBlockListBuilder.php
+++ b/core/modules/config_translation/src/Controller/ConfigTranslationBlockListBuilder.php
@@ -18,7 +18,7 @@ class ConfigTranslationBlockListBuilder extends ConfigTranslationEntityListBuild
    *
    * @var array
    */
-  protected $themes = array();
+  protected $themes = [];
 
   /**
    * {@inheritdoc}
@@ -58,20 +58,20 @@ public function buildRow(EntityInterface $entity) {
     $theme = $entity->getTheme();
     $plugin_definition = $entity->getPlugin()->getPluginDefinition();
 
-    $row['label'] = array(
+    $row['label'] = [
       'data' => $entity->label(),
       'class' => 'table-filter-text-source',
-    );
+    ];
 
-    $row['theme'] = array(
+    $row['theme'] = [
       'data' => $this->themes[$theme]->info['name'],
       'class' => 'table-filter-text-source',
-    );
+    ];
 
-    $row['category'] = array(
+    $row['category'] = [
       'data' => $plugin_definition['category'],
       'class' => 'table-filter-text-source',
-    );
+    ];
 
     $row['operations']['data'] = $this->buildOperations($entity);
 
@@ -93,7 +93,7 @@ public function buildHeader() {
    * {@inheritdoc}
    */
   public function sortRows($a, $b) {
-    return $this->sortRowsMultiple($a, $b, array('theme', 'category', 'label'));
+    return $this->sortRowsMultiple($a, $b, ['theme', 'category', 'label']);
   }
 
 }
diff --git a/core/modules/config_translation/src/Controller/ConfigTranslationController.php b/core/modules/config_translation/src/Controller/ConfigTranslationController.php
index 927a1e2bf58be05e31746d008797d248f6339d37..8d9bfe7bdefaf5b3e74f7a546d342ea8464e5460 100644
--- a/core/modules/config_translation/src/Controller/ConfigTranslationController.php
+++ b/core/modules/config_translation/src/Controller/ConfigTranslationController.php
@@ -134,12 +134,12 @@ public function itemPage(Request $request, RouteMatchInterface $route_match, $pl
     $mapper = $this->configMapperManager->createInstance($plugin_id);
     $mapper->populateFromRouteMatch($route_match);
 
-    $page = array();
-    $page['#title'] = $this->t('Translations for %label', array('%label' => $mapper->getTitle()));
+    $page = [];
+    $page['#title'] = $this->t('Translations for %label', ['%label' => $mapper->getTitle()]);
 
     $languages = $this->languageManager->getLanguages();
     if (count($languages) == 1) {
-      drupal_set_message($this->t('In order to translate configuration, the website must have at least two <a href=":url">languages</a>.', array(':url' => $this->url('entity.configurable_language.collection'))), 'warning');
+      drupal_set_message($this->t('In order to translate configuration, the website must have at least two <a href=":url">languages</a>.', [':url' => $this->url('entity.configurable_language.collection')]), 'warning');
     }
 
     try {
@@ -172,7 +172,7 @@ public function itemPage(Request $request, RouteMatchInterface $route_match, $pl
       // If the language is not configured on the site, create a dummy language
       // object for this listing only to ensure the user gets useful info.
       $language_name = $this->languageManager->getLanguageName($original_langcode);
-      $languages[$original_langcode] = new Language(array('id' => $original_langcode, 'name' => $language_name));
+      $languages[$original_langcode] = new Language(['id' => $original_langcode, 'name' => $language_name]);
     }
 
     // We create a fake request object to pass into
@@ -181,10 +181,10 @@ public function itemPage(Request $request, RouteMatchInterface $route_match, $pl
     // possible nor performant.
     $fake_request = $request->duplicate();
 
-    $page['languages'] = array(
+    $page['languages'] = [
       '#type' => 'table',
-      '#header' => array($this->t('Language'), $this->t('Operations')),
-    );
+      '#header' => [$this->t('Language'), $this->t('Operations')],
+    ];
     foreach ($languages as $language) {
       $langcode = $language->getId();
 
@@ -198,57 +198,57 @@ public function itemPage(Request $request, RouteMatchInterface $route_match, $pl
       // Prepare the language name and the operations depending on whether this
       // is the original language or not.
       if ($langcode == $original_langcode) {
-        $language_name = '<strong>' . $this->t('@language (original)', array('@language' => $language->getName())) . '</strong>';
+        $language_name = '<strong>' . $this->t('@language (original)', ['@language' => $language->getName()]) . '</strong>';
 
         // Check access for the path/route for editing, so we can decide to
         // include a link to edit or not.
         $edit_access = $this->accessManager->checkNamedRoute($mapper->getBaseRouteName(), $route_match->getRawParameters()->all(), $this->account);
 
         // Build list of operations.
-        $operations = array();
+        $operations = [];
         if ($edit_access) {
-          $operations['edit'] = array(
+          $operations['edit'] = [
             'title' => $this->t('Edit'),
             'url' => Url::fromRoute($mapper->getBaseRouteName(), $mapper->getBaseRouteParameters(), ['query' => ['destination' => $mapper->getOverviewPath()]]),
-          );
+          ];
         }
       }
       else {
         $language_name = $language->getName();
 
-        $operations = array();
+        $operations = [];
         // If no translation exists for this language, link to add one.
         if (!$mapper->hasTranslation($language)) {
-          $operations['add'] = array(
+          $operations['add'] = [
             'title' => $this->t('Add'),
             'url' => Url::fromRoute($mapper->getAddRouteName(), $mapper->getAddRouteParameters()),
-          );
+          ];
         }
         else {
           // Otherwise, link to edit the existing translation.
-          $operations['edit'] = array(
+          $operations['edit'] = [
             'title' => $this->t('Edit'),
             'url' => Url::fromRoute($mapper->getEditRouteName(), $mapper->getEditRouteParameters()),
-          );
+          ];
 
-          $operations['delete'] = array(
+          $operations['delete'] = [
             'title' => $this->t('Delete'),
             'url' => Url::fromRoute($mapper->getDeleteRouteName(), $mapper->getDeleteRouteParameters()),
-          );
+          ];
         }
       }
 
-      $page['languages'][$langcode]['language'] = array(
+      $page['languages'][$langcode]['language'] = [
         '#markup' => $language_name,
-      );
+      ];
 
-      $page['languages'][$langcode]['operations'] = array(
+      $page['languages'][$langcode]['operations'] = [
         '#type' => 'operations',
         '#links' => $operations,
         // Even if the mapper contains multiple language codes, the source
         // configuration can still be edited.
         '#access' => ($langcode == $original_langcode) || $operations_access,
-      );
+      ];
     }
     return $page;
   }
diff --git a/core/modules/config_translation/src/Controller/ConfigTranslationEntityListBuilder.php b/core/modules/config_translation/src/Controller/ConfigTranslationEntityListBuilder.php
index e86237e3c968cd12d9ca17b622ec682428971c3d..87cb2605c03afd839acc2f27eae8314e65e6fe87 100644
--- a/core/modules/config_translation/src/Controller/ConfigTranslationEntityListBuilder.php
+++ b/core/modules/config_translation/src/Controller/ConfigTranslationEntityListBuilder.php
@@ -16,10 +16,10 @@ class ConfigTranslationEntityListBuilder extends ConfigEntityListBuilder impleme
    * @return array
    */
   protected function getFilterLabels() {
-    return array(
+    return [
       'placeholder' => $this->t('Enter label'),
       'description' => $this->t('Enter a part of the label or description to filter by.'),
-    );
+    ];
   }
 
   /**
@@ -29,28 +29,28 @@ public function render() {
     $build = parent::render();
     $filter = $this->getFilterLabels();
 
-    usort($build['table']['#rows'], array($this, 'sortRows'));
+    usort($build['table']['#rows'], [$this, 'sortRows']);
 
-    $build['filters'] = array(
+    $build['filters'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('table-filter', 'js-show'),
-      ),
+      '#attributes' => [
+        'class' => ['table-filter', 'js-show'],
+      ],
       '#weight' => -10,
-    );
+    ];
 
-    $build['filters']['text'] = array(
+    $build['filters']['text'] = [
       '#type' => 'search',
       '#title' => $this->t('Search'),
       '#size' => 30,
       '#placeholder' => $filter['placeholder'],
-      '#attributes' => array(
-        'class' => array('table-filter-text'),
+      '#attributes' => [
+        'class' => ['table-filter-text'],
         'data-table' => '.config-translation-entity-list',
         'autocomplete' => 'off',
         'title' => $filter['description'],
-      ),
-    );
+      ],
+    ];
 
     $build['table']['#attributes']['class'][] = 'config-translation-entity-list';
     $build['table']['#weight'] = 0;
@@ -95,7 +95,7 @@ public function getOperations(EntityInterface $entity) {
    * {@inheritdoc}
    */
   public function sortRows($a, $b) {
-    return $this->sortRowsMultiple($a, $b, array('label'));
+    return $this->sortRowsMultiple($a, $b, ['label']);
   }
 
   /**
diff --git a/core/modules/config_translation/src/Controller/ConfigTranslationFieldListBuilder.php b/core/modules/config_translation/src/Controller/ConfigTranslationFieldListBuilder.php
index 6388c811dfede1938a899c31bf45fbc2d3d65312..566afdbb23004a96230fb241fc33ccc5966c8700 100644
--- a/core/modules/config_translation/src/Controller/ConfigTranslationFieldListBuilder.php
+++ b/core/modules/config_translation/src/Controller/ConfigTranslationFieldListBuilder.php
@@ -26,14 +26,14 @@ class ConfigTranslationFieldListBuilder extends ConfigTranslationEntityListBuild
    *
    * @var array
    */
-  protected $baseEntityInfo = array();
+  protected $baseEntityInfo = [];
 
   /**
    * The bundle info for the base entity type.
    *
    * @var array
    */
-  protected $baseEntityBundles = array();
+  protected $baseEntityBundles = [];
 
   /**
    * The entity manager.
@@ -99,8 +99,8 @@ public function getFilterLabels() {
     $bundle = $this->baseEntityInfo->getBundleLabel() ?: $this->t('Bundle');
     $bundle = Unicode::strtolower($bundle);
 
-    $info['placeholder'] = $this->t('Enter field or @bundle', array('@bundle' => $bundle));
-    $info['description'] = $this->t('Enter a part of the field or @bundle to filter by.', array('@bundle' => $bundle));
+    $info['placeholder'] = $this->t('Enter field or @bundle', ['@bundle' => $bundle]);
+    $info['description'] = $this->t('Enter a part of the field or @bundle to filter by.', ['@bundle' => $bundle]);
 
     return $info;
   }
@@ -109,17 +109,17 @@ public function getFilterLabels() {
    * {@inheritdoc}
    */
   public function buildRow(EntityInterface $entity) {
-    $row['label'] = array(
+    $row['label'] = [
       'data' => $entity->label(),
       'class' => 'table-filter-text-source',
-    );
+    ];
 
     if ($this->displayBundle()) {
       $bundle = $entity->get('bundle');
-      $row['bundle'] = array(
+      $row['bundle'] = [
         'data' => $this->baseEntityBundles[$bundle]['label'],
         'class' => 'table-filter-text-source',
-      );
+      ];
     }
 
     return $row + parent::buildRow($entity);
@@ -165,7 +165,7 @@ public function displayBundle() {
    * {@inheritdoc}
    */
   public function sortRows($a, $b) {
-    return $this->sortRowsMultiple($a, $b, array('bundle', 'label'));
+    return $this->sortRowsMultiple($a, $b, ['bundle', 'label']);
   }
 
 }
diff --git a/core/modules/config_translation/src/Controller/ConfigTranslationMapperList.php b/core/modules/config_translation/src/Controller/ConfigTranslationMapperList.php
index f47d313c28ffd8511d5f460bf10d650b0a9dac17..4e510aaf38e48e601edb0cc87b01d60c967d21ba 100644
--- a/core/modules/config_translation/src/Controller/ConfigTranslationMapperList.php
+++ b/core/modules/config_translation/src/Controller/ConfigTranslationMapperList.php
@@ -46,13 +46,13 @@ public static function create(ContainerInterface $container) {
    *   Renderable array with config translation mappers.
    */
   public function render() {
-    $build = array(
+    $build = [
       '#type' => 'table',
       '#header' => $this->buildHeader(),
-      '#rows' => array(),
-    );
+      '#rows' => [],
+    ];
 
-    $mappers = array();
+    $mappers = [];
 
     foreach ($this->mappers as $mapper) {
       if ($row = $this->buildRow($mapper)) {
@@ -120,10 +120,10 @@ protected function buildOperations(ConfigMapperInterface $mapper) {
     // Retrieve and sort operations.
     $operations = $mapper->getOperations();
     uasort($operations, 'Drupal\Component\Utility\SortArray::sortByWeightElement');
-    $build = array(
+    $build = [
       '#type' => 'operations',
       '#links' => $operations,
-    );
+    ];
     return $build;
   }
 
diff --git a/core/modules/config_translation/src/Form/ConfigTranslationAddForm.php b/core/modules/config_translation/src/Form/ConfigTranslationAddForm.php
index 3d0620218ad1302ce40ff996c36f24572c66a7ed..9edcb8c60a755bce809926d789e06f7243f0f503 100644
--- a/core/modules/config_translation/src/Form/ConfigTranslationAddForm.php
+++ b/core/modules/config_translation/src/Form/ConfigTranslationAddForm.php
@@ -22,10 +22,10 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state, RouteMatchInterface $route_match = NULL, $plugin_id = NULL, $langcode = NULL) {
     $form = parent::buildForm($form, $form_state, $route_match, $plugin_id, $langcode);
-    $form['#title'] = $this->t('Add @language translation for %label', array(
+    $form['#title'] = $this->t('Add @language translation for %label', [
       '%label' => $this->mapper->getTitle(),
       '@language' => $this->language->getName(),
-    ));
+    ]);
     return $form;
   }
 
@@ -34,7 +34,7 @@ public function buildForm(array $form, FormStateInterface $form_state, RouteMatc
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     parent::submitForm($form, $form_state);
-    drupal_set_message($this->t('Successfully saved @language translation.', array('@language' => $this->language->getName())));
+    drupal_set_message($this->t('Successfully saved @language translation.', ['@language' => $this->language->getName()]));
   }
 
 }
diff --git a/core/modules/config_translation/src/Form/ConfigTranslationDeleteForm.php b/core/modules/config_translation/src/Form/ConfigTranslationDeleteForm.php
index 089ae271090f559c18f3d262217645ff5d4bdf21..ca3ad28aa30de8a47f726cb62fec2663f805fc5e 100644
--- a/core/modules/config_translation/src/Form/ConfigTranslationDeleteForm.php
+++ b/core/modules/config_translation/src/Form/ConfigTranslationDeleteForm.php
@@ -84,7 +84,7 @@ public static function create(ContainerInterface $container) {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to delete the @language translation of %label?', array('%label' => $this->mapper->getTitle(), '@language' => $this->language->getName()));
+    return $this->t('Are you sure you want to delete the @language translation of %label?', ['%label' => $this->mapper->getTitle(), '@language' => $this->language->getName()]);
   }
 
   /**
@@ -140,7 +140,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $cache_backend->deleteAll();
     }
 
-    drupal_set_message($this->t('@language translation of %label was deleted', array('%label' => $this->mapper->getTitle(), '@language' => $this->language->getName())));
+    drupal_set_message($this->t('@language translation of %label was deleted', ['%label' => $this->mapper->getTitle(), '@language' => $this->language->getName()]));
 
     $form_state->setRedirectUrl($this->getCancelUrl());
   }
diff --git a/core/modules/config_translation/src/Form/ConfigTranslationEditForm.php b/core/modules/config_translation/src/Form/ConfigTranslationEditForm.php
index 5af4244349faa50c29f13aa67bc00eeeec208ce0..86a8f1cac2f21794c9f4a3c33bf83cb505c08760 100644
--- a/core/modules/config_translation/src/Form/ConfigTranslationEditForm.php
+++ b/core/modules/config_translation/src/Form/ConfigTranslationEditForm.php
@@ -22,10 +22,10 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state, RouteMatchInterface $route_match = NULL, $plugin_id = NULL, $langcode = NULL) {
     $form = parent::buildForm($form, $form_state, $route_match, $plugin_id, $langcode);
-    $form['#title'] = $this->t('Edit @language translation for %label', array(
+    $form['#title'] = $this->t('Edit @language translation for %label', [
       '%label' => $this->mapper->getTitle(),
       '@language' => $this->language->getName(),
-    ));
+    ]);
     return $form;
   }
 
@@ -34,7 +34,7 @@ public function buildForm(array $form, FormStateInterface $form_state, RouteMatc
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     parent::submitForm($form, $form_state);
-    drupal_set_message($this->t('Successfully updated @language translation.', array('@language' => $this->language->getName())));
+    drupal_set_message($this->t('Successfully updated @language translation.', ['@language' => $this->language->getName()]));
   }
 
 }
diff --git a/core/modules/config_translation/src/Form/ConfigTranslationFormBase.php b/core/modules/config_translation/src/Form/ConfigTranslationFormBase.php
index 12e021628367e6717bf8dfdf40b19448d3b9cd5f..82f01d714ab06b0c956b539103cf818c1fe315d1 100644
--- a/core/modules/config_translation/src/Form/ConfigTranslationFormBase.php
+++ b/core/modules/config_translation/src/Form/ConfigTranslationFormBase.php
@@ -65,7 +65,7 @@ abstract class ConfigTranslationFormBase extends FormBase implements BaseFormIdI
    *
    * @var array
    */
-  protected $baseConfigData = array();
+  protected $baseConfigData = [];
 
   /**
    * Constructs a ConfigTranslationFormBase.
@@ -164,26 +164,26 @@ public function buildForm(array $form, FormStateInterface $form_state, RouteMatc
     // Even though this is a nested form, we do not set #tree to TRUE because
     // the form value structure is generated by using #parents for each element.
     // @see \Drupal\config_translation\FormElement\FormElementBase::getElements()
-    $form['config_names'] = array('#type' => 'container');
+    $form['config_names'] = ['#type' => 'container'];
     foreach ($this->mapper->getConfigNames() as $name) {
-      $form['config_names'][$name] = array('#type' => 'container');
+      $form['config_names'][$name] = ['#type' => 'container'];
 
       $schema = $this->typedConfigManager->get($name);
       $source_config = $this->baseConfigData[$name];
       $translation_config = $this->configFactory()->get($name)->get();
 
       if ($form_element = $this->createFormElement($schema)) {
-        $parents = array('config_names', $name);
+        $parents = ['config_names', $name];
         $form['config_names'][$name] += $form_element->getTranslationBuild($this->sourceLanguage, $this->language, $source_config, $translation_config, $parents);
       }
     }
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save translation'),
       '#button_type' => 'primary',
-    );
+    ];
 
     // Set the configuration language back.
     $this->languageManager->setConfigOverrideLanguage($original_language);
@@ -195,7 +195,7 @@ public function buildForm(array $form, FormStateInterface $form_state, RouteMatc
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    $form_values = $form_state->getValue(array('translation', 'config_names'));
+    $form_values = $form_state->getValue(['translation', 'config_names']);
 
     foreach ($this->mapper->getConfigNames() as $name) {
       $schema = $this->typedConfigManager->get($name);
diff --git a/core/modules/config_translation/src/FormElement/DateFormat.php b/core/modules/config_translation/src/FormElement/DateFormat.php
index 4a4b995861a84338c4c1acfdaea448954ba38e3f..d0ae033a426f5810de77620af3e51232b02f1edf 100644
--- a/core/modules/config_translation/src/FormElement/DateFormat.php
+++ b/core/modules/config_translation/src/FormElement/DateFormat.php
@@ -16,7 +16,7 @@ public function getTranslationElement(LanguageInterface $translation_language, $
     /** @var \Drupal\Core\Datetime\DateFormatterInterface $date_formatter */
     $date_formatter = \Drupal::service('date.formatter');
     $description = $this->t('A user-defined date format. See the <a href="http://php.net/manual/function.date.php">PHP manual</a> for available options.');
-    $format = $this->t('Displayed as %date_format', array('%date_format' => $date_formatter->format(REQUEST_TIME, 'custom', $translation_config)));
+    $format = $this->t('Displayed as %date_format', ['%date_format' => $date_formatter->format(REQUEST_TIME, 'custom', $translation_config)]);
 
     return [
       '#type' => 'textfield',
diff --git a/core/modules/config_translation/src/FormElement/FormElementBase.php b/core/modules/config_translation/src/FormElement/FormElementBase.php
index 2b5c8f47805b5cf69c6c8e7d1b1234d976863d2e..3c97daf1b4b175f7c0214274ddcde445ad8567ff 100644
--- a/core/modules/config_translation/src/FormElement/FormElementBase.php
+++ b/core/modules/config_translation/src/FormElement/FormElementBase.php
@@ -64,8 +64,8 @@ public function getTranslationBuild(LanguageInterface $source_language, Language
     $build['source'] = $this->getSourceElement($source_language, $source_config);
     $build['translation'] = $this->getTranslationElement($translation_language, $source_config, $translation_config);
 
-    $build['source']['#parents'] = array_merge(array('source'), $parents);
-    $build['translation']['#parents'] = array_merge(array('translation'), $parents);
+    $build['source']['#parents'] = array_merge(['source'], $parents);
+    $build['translation']['#parents'] = array_merge(['translation'], $parents);
     return $build;
   }
 
@@ -93,15 +93,15 @@ protected function getSourceElement(LanguageInterface $source_language, $source_
       $value = $this->t('(Empty)');
     }
 
-    return array(
+    return [
       '#type' => 'item',
-      '#title' => $this->t('@label <span class="visually-hidden">(@source_language)</span>', array(
+      '#title' => $this->t('@label <span class="visually-hidden">(@source_language)</span>', [
         // Labels originate from configuration schema and are translatable.
         '@label' => $this->t($this->definition->getLabel()),
         '@source_language' => $source_language->getName(),
-      )),
+      ]),
       '#markup' => $value,
-    );
+    ];
   }
 
   /**
@@ -157,15 +157,15 @@ protected function getSourceElement(LanguageInterface $source_language, $source_
    */
   protected function getTranslationElement(LanguageInterface $translation_language, $source_config, $translation_config) {
     // Add basic properties that apply to all form elements.
-    return array(
-      '#title' => $this->t('@label <span class="visually-hidden">(@source_language)</span>', array(
+    return [
+      '#title' => $this->t('@label <span class="visually-hidden">(@source_language)</span>', [
         // Labels originate from configuration schema and are translatable.
         '@label' => $this->t($this->definition->getLabel()),
         '@source_language' => $translation_language->getName(),
-      )),
+      ]),
       '#default_value' => $translation_config,
-      '#attributes' => array('lang' => $translation_language->getId()),
-    );
+      '#attributes' => ['lang' => $translation_language->getId()],
+    ];
   }
 
   /**
diff --git a/core/modules/config_translation/src/FormElement/ListElement.php b/core/modules/config_translation/src/FormElement/ListElement.php
index e956536e78b205de4583bbf60782a4fd34671219..1ea452362b8b6c9ed159cc456b11f44be25ecde3 100644
--- a/core/modules/config_translation/src/FormElement/ListElement.php
+++ b/core/modules/config_translation/src/FormElement/ListElement.php
@@ -46,14 +46,14 @@ public static function create(TypedDataInterface $schema) {
    * {@inheritdoc}
    */
   public function getTranslationBuild(LanguageInterface $source_language, LanguageInterface $translation_language, $source_config, $translation_config, array $parents, $base_key = NULL) {
-    $build = array();
+    $build = [];
     foreach ($this->element as $key => $element) {
-      $sub_build = array();
+      $sub_build = [];
       $element_key = isset($base_key) ? "$base_key.$key" : $key;
       $definition = $element->getDataDefinition();
 
       if ($form_element = ConfigTranslationFormBase::createFormElement($element)) {
-        $element_parents = array_merge($parents, array($key));
+        $element_parents = array_merge($parents, [$key]);
         $sub_build += $form_element->getTranslationBuild($source_language, $translation_language, $source_config[$key], $translation_config[$key], $element_parents, $element_key);
 
         if (empty($sub_build)) {
@@ -62,13 +62,13 @@ public function getTranslationBuild(LanguageInterface $source_language, Language
 
         // Build the sub-structure and include it with a wrapper in the form if
         // there are any translatable elements there.
-        $build[$key] = array();
+        $build[$key] = [];
         if ($element instanceof TraversableTypedDataInterface) {
-          $build[$key] = array(
+          $build[$key] = [
             '#type' => 'details',
             '#title' => $this->getGroupTitle($definition, $sub_build),
             '#open' => empty($base_key),
-          );
+          ];
         }
         $build[$key] += $sub_build;
       }
diff --git a/core/modules/config_translation/src/FormElement/PluralVariants.php b/core/modules/config_translation/src/FormElement/PluralVariants.php
index 624ff77bc76b8a679455d91c4875f84a44e147c0..aabca8a55786a34d0e68773ec70aa3b2adbb5e3f 100644
--- a/core/modules/config_translation/src/FormElement/PluralVariants.php
+++ b/core/modules/config_translation/src/FormElement/PluralVariants.php
@@ -18,25 +18,25 @@ class PluralVariants extends FormElementBase {
   protected function getSourceElement(LanguageInterface $source_language, $source_config) {
     $plurals = $this->getNumberOfPlurals($source_language->getId());
     $values = explode(LOCALE_PLURAL_DELIMITER, $source_config);
-    $element = array(
+    $element = [
       '#type' => 'fieldset',
-      '#title' => SafeMarkup::format('@label <span class="visually-hidden">(@source_language)</span>', array(
+      '#title' => SafeMarkup::format('@label <span class="visually-hidden">(@source_language)</span>', [
         // Labels originate from configuration schema and are translatable.
         '@label' => $this->t($this->definition->getLabel()),
         '@source_language' => $source_language->getName(),
-      )),
+      ]),
       '#tree' => TRUE,
-    );
+    ];
     for ($i = 0; $i < $plurals; $i++) {
-      $element[$i] = array(
+      $element[$i] = [
         '#type' => 'item',
         // @todo Should use better labels https://www.drupal.org/node/2499639
         '#title' => $i == 0 ? $this->t('Singular form') : $this->formatPlural($i, 'First plural form', '@count. plural form'),
-        '#markup' => SafeMarkup::format('<span lang="@langcode">@value</span>', array(
+        '#markup' => SafeMarkup::format('<span lang="@langcode">@value</span>', [
           '@langcode' => $source_language->getId(),
           '@value' => isset($values[$i]) ? $values[$i] : $this->t('(Empty)'),
-        )),
-      );
+        ]),
+      ];
     }
     return $element;
   }
@@ -47,23 +47,23 @@ protected function getSourceElement(LanguageInterface $source_language, $source_
   protected function getTranslationElement(LanguageInterface $translation_language, $source_config, $translation_config) {
     $plurals = $this->getNumberOfPlurals($translation_language->getId());
     $values = explode(LOCALE_PLURAL_DELIMITER, $translation_config);
-    $element = array(
+    $element = [
       '#type' => 'fieldset',
-      '#title' => SafeMarkup::format('@label <span class="visually-hidden">(@translation_language)</span>', array(
+      '#title' => SafeMarkup::format('@label <span class="visually-hidden">(@translation_language)</span>', [
         // Labels originate from configuration schema and are translatable.
         '@label' => $this->t($this->definition->getLabel()),
         '@translation_language' => $translation_language->getName(),
-      )),
+      ]),
       '#tree' => TRUE,
-    );
+    ];
     for ($i = 0; $i < $plurals; $i++) {
-      $element[$i] = array(
+      $element[$i] = [
         '#type' => 'textfield',
         // @todo Should use better labels https://www.drupal.org/node/2499639
         '#title' => $i == 0 ? $this->t('Singular form') : $this->formatPlural($i, 'First plural form', '@count. plural form'),
         '#default_value' => isset($values[$i]) ? $values[$i] : '',
-        '#attributes' => array('lang' => $translation_language->getId()),
-      );
+        '#attributes' => ['lang' => $translation_language->getId()],
+      ];
     }
     return $element;
   }
diff --git a/core/modules/config_translation/src/FormElement/TextFormat.php b/core/modules/config_translation/src/FormElement/TextFormat.php
index e9d56f29b98fa218db04d1b189be35408c13731d..f9f6bc61bca63e39652f52b207667ad6dd37da51 100644
--- a/core/modules/config_translation/src/FormElement/TextFormat.php
+++ b/core/modules/config_translation/src/FormElement/TextFormat.php
@@ -16,25 +16,25 @@ public function getSourceElement(LanguageInterface $source_language, $source_con
     // Instead of the formatted output show a disabled textarea. This allows for
     // easier side-by-side comparison, especially with formats with text
     // editors.
-    return $this->getTranslationElement($source_language, $source_config, $source_config) + array(
+    return $this->getTranslationElement($source_language, $source_config, $source_config) + [
       '#value' => $source_config['value'],
       '#disabled' => TRUE,
       '#allow_focus' => TRUE,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getTranslationElement(LanguageInterface $translation_language, $source_config, $translation_config) {
-    return array(
+    return [
       '#type' => 'text_format',
       // Override the #default_value property from the parent class.
       '#default_value' => $translation_config['value'],
       '#format' => $translation_config['format'],
       // @see \Drupal\config_translation\Element\FormElementBase::getTranslationElement()
-      '#allowed_formats' => array($source_config['format']),
-    ) + parent::getTranslationElement($translation_language, $source_config, $translation_config);
+      '#allowed_formats' => [$source_config['format']],
+    ] + parent::getTranslationElement($translation_language, $source_config, $translation_config);
   }
 
 }
diff --git a/core/modules/config_translation/src/FormElement/Textarea.php b/core/modules/config_translation/src/FormElement/Textarea.php
index 174a70c5c31ac6428ad8489e89364055f85b6a10..ff9e4cde4035da60c9d340c35c73e1255c5e4254 100644
--- a/core/modules/config_translation/src/FormElement/Textarea.php
+++ b/core/modules/config_translation/src/FormElement/Textarea.php
@@ -18,10 +18,10 @@ public function getTranslationElement(LanguageInterface $translation_language, $
     $rows_newlines = substr_count($translation_config, "\n" ) + 1;
     $rows = max($rows_words, $rows_newlines);
 
-    return array(
+    return [
       '#type' => 'textarea',
       '#rows' => $rows,
-    ) + parent::getTranslationElement($translation_language, $source_config, $translation_config);
+    ] + parent::getTranslationElement($translation_language, $source_config, $translation_config);
   }
 
 }
diff --git a/core/modules/config_translation/src/FormElement/Textfield.php b/core/modules/config_translation/src/FormElement/Textfield.php
index fa0c869a0a665d2497e7671b171b049cd7b55927..cff1037183d7ebd330d37da54e7dbbb3dccf40f0 100644
--- a/core/modules/config_translation/src/FormElement/Textfield.php
+++ b/core/modules/config_translation/src/FormElement/Textfield.php
@@ -13,9 +13,9 @@ class Textfield extends FormElementBase {
    * {@inheritdoc}
    */
   public function getTranslationElement(LanguageInterface $translation_language, $source_config, $translation_config) {
-    return array(
+    return [
       '#type' => 'textfield',
-    ) + parent::getTranslationElement($translation_language, $source_config, $translation_config);
+    ] + parent::getTranslationElement($translation_language, $source_config, $translation_config);
   }
 
 }
diff --git a/core/modules/config_translation/src/Plugin/Menu/ContextualLink/ConfigTranslationContextualLink.php b/core/modules/config_translation/src/Plugin/Menu/ContextualLink/ConfigTranslationContextualLink.php
index fb2bf24cc224dee5e334ef6fcf15a4c250bd2a27..63145a5d3b328bfbbcdda996d66e11a5416aa67d 100644
--- a/core/modules/config_translation/src/Plugin/Menu/ContextualLink/ConfigTranslationContextualLink.php
+++ b/core/modules/config_translation/src/Plugin/Menu/ContextualLink/ConfigTranslationContextualLink.php
@@ -28,7 +28,7 @@ public function getTitle() {
     // storing the title on the plugin definition for the link) because it
     // contains translated parts that we need in the runtime language.
     $type_name = Unicode::strtolower($this->mapperManager()->createInstance($this->pluginDefinition['config_translation_plugin_id'])->getTypeLabel());
-    return $this->t('Translate @type_name', array('@type_name' => $type_name));
+    return $this->t('Translate @type_name', ['@type_name' => $type_name]);
   }
 
   /**
diff --git a/core/modules/config_translation/src/Plugin/Menu/LocalTask/ConfigTranslationLocalTask.php b/core/modules/config_translation/src/Plugin/Menu/LocalTask/ConfigTranslationLocalTask.php
index 63605c66ac909d136b987ab0f5616b94955e3dec..5a88d91d0abde3a4c2d36262be679d2b48b76f79 100644
--- a/core/modules/config_translation/src/Plugin/Menu/LocalTask/ConfigTranslationLocalTask.php
+++ b/core/modules/config_translation/src/Plugin/Menu/LocalTask/ConfigTranslationLocalTask.php
@@ -28,7 +28,7 @@ public function getTitle() {
     // storing the title on the plugin definition for the link) because
     // it contains translated parts that we need in the runtime language.
     $type_name = Unicode::strtolower($this->mapperManager()->createInstance($this->pluginDefinition['config_translation_plugin_id'])->getTypeLabel());
-    return $this->t('Translate @type_name', array('@type_name' => $type_name));
+    return $this->t('Translate @type_name', ['@type_name' => $type_name]);
   }
 
   /**
diff --git a/core/modules/config_translation/src/Plugin/migrate/source/d6/I18nProfileField.php b/core/modules/config_translation/src/Plugin/migrate/source/d6/I18nProfileField.php
index ecdffd65b648bcae641598086ae9dd8bf5b201e7..2989f967b59ec0bbf1826422f20a7c42499bb909 100644
--- a/core/modules/config_translation/src/Plugin/migrate/source/d6/I18nProfileField.php
+++ b/core/modules/config_translation/src/Plugin/migrate/source/d6/I18nProfileField.php
@@ -31,12 +31,12 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'fid' => $this->t('Profile field ID.'),
       'lid' => $this->t('Locales target language ID.'),
       'language' => $this->t('Language for this field.'),
       'translation' => $this->t('Translation of either the title or explanation.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/config_translation/src/Routing/RouteSubscriber.php b/core/modules/config_translation/src/Routing/RouteSubscriber.php
index b20c13fdca420542ddb37c0fecbae1d3a9b5641e..10044aa7f80e1648f55eb9deeb51d18e4fb0f920 100644
--- a/core/modules/config_translation/src/Routing/RouteSubscriber.php
+++ b/core/modules/config_translation/src/Routing/RouteSubscriber.php
@@ -48,7 +48,7 @@ protected function alterRoutes(RouteCollection $collection) {
    */
   public static function getSubscribedEvents() {
     // Come after field_ui.
-    $events[RoutingEvents::ALTER] = array('onAlterRoutes', -110);
+    $events[RoutingEvents::ALTER] = ['onAlterRoutes', -110];
     return $events;
   }
 
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationFormTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationFormTest.php
index 648f04739aae0259836562e0f06d8fc69f91d8b3..387d6864604d33f88c08e17129ae7c549a8a1f32 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationFormTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationFormTest.php
@@ -17,7 +17,7 @@ class ConfigTranslationFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_translation', 'config_translation_test', 'editor');
+  public static $modules = ['config_translation', 'config_translation_test', 'editor'];
 
   /**
    * The plugin ID of the mapper to test.
@@ -40,7 +40,7 @@ protected function setUp() {
     $this->pluginId = key($definitions);
 
     $this->langcode = 'xx';
-    ConfigurableLanguage::create(array('id' => $this->langcode, 'label' => 'XX'))->save();
+    ConfigurableLanguage::create(['id' => $this->langcode, 'label' => 'XX'])->save();
 
     \Drupal::state()->set('config_translation_test_alter_form_alter', TRUE);
   }
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
index e7c58fd97d526a880cf21d25ff3694a338998bb7..d593a69d385d7a262389a6b4f4d0cea2d45409bd 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
@@ -35,7 +35,7 @@ class ConfigTranslationOverviewTest extends WebTestBase {
    *
    * @var array
    */
-  protected $langcodes = array('fr', 'ta');
+  protected $langcodes = ['fr', 'ta'];
 
   /**
    * String translation storage object.
@@ -46,7 +46,7 @@ class ConfigTranslationOverviewTest extends WebTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $permissions = array(
+    $permissions = [
       'translate configuration',
       'administer languages',
       'administer site configuration',
@@ -54,7 +54,7 @@ protected function setUp() {
       'access site-wide contact form',
       'access contextual links',
       'administer views',
-    );
+    ];
     // Create and log in user.
     $this->drupalLogin($this->drupalCreateUser($permissions));
 
@@ -83,17 +83,17 @@ public function testMapperListPage() {
       }
     }
 
-    $labels = array(
+    $labels = [
       '&$nxd~i0',
       'some "label" with quotes',
       $this->randomString(),
-    );
+    ];
 
     foreach ($labels as $label) {
-      $test_entity = entity_create('config_test', array(
+      $test_entity = entity_create('config_test', [
         'id' => $this->randomMachineName(),
         'label' => $label,
-      ));
+      ]);
       $test_entity->save();
 
       $base_url = 'admin/structure/config_test/manage/' . $test_entity->id();
@@ -119,7 +119,7 @@ public function testMapperListPage() {
       $this->assertRaw('<th>' . t('Language') . '</th>');
 
       $this->drupalGet($base_url);
-      $this->assertLink(t('Translate @title', array('@title' => $entity_type->getLowercaseLabel())));
+      $this->assertLink(t('Translate @title', ['@title' => $entity_type->getLowercaseLabel()]));
     }
   }
 
@@ -154,10 +154,10 @@ public function testListingPageWithOverrides() {
     $config_test_storage = $this->container->get('entity.manager')->getStorage('config_test');
 
     // Set up an override.
-    $settings['config']['config_test.dynamic.dotted.default']['label'] = (object) array(
+    $settings['config']['config_test.dynamic.dotted.default']['label'] = (object) [
       'value' => $overridden_label,
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
 
     // Test that the overridden label is loaded with the entity.
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
index 5018efa21f48f9b31ff15b867a799b77cd2ee642..7ec350ba2c88ef259db23c36be3bf25ff066c971 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
@@ -48,7 +48,7 @@ class ConfigTranslationUiTest extends WebTestBase {
    *
    * @var array
    */
-  protected $langcodes = array('fr', 'ta');
+  protected $langcodes = ['fr', 'ta'];
 
   /**
    * Administrator user for tests.
@@ -157,13 +157,13 @@ public function testSiteInformationTranslationUi() {
     $this->assertRaw($site_slogan);
 
     // Update site name and slogan for French.
-    $edit = array(
+    $edit = [
       'translation[config_names][system.site][name]' => $fr_site_name,
       'translation[config_names][system.site][slogan]' => $fr_site_slogan,
-    );
+    ];
 
     $this->drupalPostForm("$translation_base_url/fr/add", $edit, t('Save translation'));
-    $this->assertRaw(t('Successfully saved @language translation.', array('@language' => 'French')));
+    $this->assertRaw(t('Successfully saved @language translation.', ['@language' => 'French']));
 
     // Check for edit, delete links (and no 'add' link) for French language.
     $this->assertNoLinkByHref("$translation_base_url/fr/add");
@@ -189,18 +189,18 @@ public function testSiteInformationTranslationUi() {
     $this->assertText($site_slogan);
 
     // Translate 'Site name' label in French.
-    $search = array(
+    $search = [
       'string' => $site_name_label,
       'langcode' => 'fr',
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
 
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $fr_site_name_label,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Ensure that the label is in French (and not in English).
@@ -234,10 +234,10 @@ public function testSourceValueDuplicateSave() {
     $this->drupalGet($translation_base_url);
 
     // Case 1: Update new value for site slogan and site name.
-    $edit = array(
+    $edit = [
       'translation[config_names][system.site][name]' => 'FR ' . $site_name,
       'translation[config_names][system.site][slogan]' => 'FR ' . $site_slogan,
-    );
+    ];
     // First time, no overrides, so just Add link.
     $this->drupalPostForm("$translation_base_url/fr/add", $edit, t('Save translation'));
 
@@ -245,10 +245,10 @@ public function testSourceValueDuplicateSave() {
     $override = \Drupal::languageManager()->getLanguageConfigOverride('fr', 'system.site');
 
     // Expect both name and slogan in language specific file.
-    $expected = array(
+    $expected = [
       'name' => 'FR ' . $site_name,
       'slogan' => 'FR ' . $site_slogan,
-    );
+    ];
     $this->assertEqual($expected, $override->get());
 
     // Case 2: Update new value for site slogan and default value for site name.
@@ -257,12 +257,12 @@ public function testSourceValueDuplicateSave() {
     // translation form into the actual site name and slogan.
     $this->assertNoText('FR ' . $site_name);
     $this->assertNoText('FR ' . $site_slogan);
-    $edit = array(
+    $edit = [
       'translation[config_names][system.site][name]' => $site_name,
       'translation[config_names][system.site][slogan]' => 'FR ' . $site_slogan,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save translation'));
-    $this->assertRaw(t('Successfully updated @language translation.', array('@language' => 'French')));
+    $this->assertRaw(t('Successfully updated @language translation.', ['@language' => 'French']));
     $override = \Drupal::languageManager()->getLanguageConfigOverride('fr', 'system.site');
 
     // Expect only slogan in language specific file.
@@ -272,10 +272,10 @@ public function testSourceValueDuplicateSave() {
     // Case 3: Keep default value for site name and slogan.
     $this->drupalGet("$translation_base_url/fr/edit");
     $this->assertNoText('FR ' . $site_slogan);
-    $edit = array(
+    $edit = [
       'translation[config_names][system.site][name]' => $site_name,
       'translation[config_names][system.site][slogan]' => $site_slogan,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save translation'));
     $override = \Drupal::languageManager()->getLanguageConfigOverride('fr', 'system.site');
 
@@ -310,11 +310,11 @@ public function testContactConfigEntityTranslation() {
 
     // Save default language configuration.
     $label = 'Send your feedback';
-    $edit = array(
+    $edit = [
       'label' => $label,
       'recipients' => 'sales@example.com,support@example.com',
       'reply' => 'Thank you for your mail',
-    );
+    ];
     $this->drupalPostForm('admin/structure/contact/manage/feedback', $edit, t('Save'));
 
     // Ensure translation link is present.
@@ -323,7 +323,7 @@ public function testContactConfigEntityTranslation() {
 
     // Make sure translate tab is present.
     $this->drupalGet('admin/structure/contact/manage/feedback');
-    $this->assertLink(t('Translate @type', array('@type' => 'contact form')));
+    $this->assertLink(t('Translate @type', ['@type' => 'contact form']));
 
     // Visit the form to confirm the changes.
     $this->drupalGet('contact/feedback');
@@ -331,7 +331,7 @@ public function testContactConfigEntityTranslation() {
 
     foreach ($this->langcodes as $langcode) {
       $this->drupalGet($translation_base_url);
-      $this->assertLink(t('Translate @type', array('@type' => 'contact form')));
+      $this->assertLink(t('Translate @type', ['@type' => 'contact form']));
 
       // 'Add' link should be present for $langcode translation.
       $translation_page_url = "$translation_base_url/$langcode/add";
@@ -342,20 +342,20 @@ public function testContactConfigEntityTranslation() {
       $this->assertText($label);
 
       // Update translatable fields.
-      $edit = array(
+      $edit = [
         'translation[config_names][contact.form.feedback][label]' => 'Website feedback - ' . $langcode,
         'translation[config_names][contact.form.feedback][reply]' => 'Thank you for your mail - ' . $langcode,
-      );
+      ];
 
       // Save language specific version of form.
       $this->drupalPostForm($translation_page_url, $edit, t('Save translation'));
 
       // Expect translated values in language specific file.
       $override = \Drupal::languageManager()->getLanguageConfigOverride($langcode, 'contact.form.feedback');
-      $expected = array(
+      $expected = [
         'label' => 'Website feedback - ' . $langcode,
         'reply' => 'Thank you for your mail - ' . $langcode,
-      );
+      ];
       $this->assertEqual($expected, $override->get());
 
       // Check for edit, delete links (and no 'add' link) for $langcode.
@@ -368,10 +368,10 @@ public function testContactConfigEntityTranslation() {
       $this->assertText('Website feedback - ' . $langcode);
 
       // Submit feedback.
-      $edit = array(
+      $edit = [
         'subject[0][value]' => 'Test subject',
         'message[0][value]' => 'Test message',
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Send message'));
     }
 
@@ -379,7 +379,7 @@ public function testContactConfigEntityTranslation() {
     // original text all appear in any translated page on the translation
     // forms.
     foreach ($this->langcodes as $langcode) {
-      $langcode_prefixes = array_merge(array(''), $this->langcodes);
+      $langcode_prefixes = array_merge([''], $this->langcodes);
       foreach ($langcode_prefixes as $langcode_prefix) {
         $this->drupalGet(ltrim("$langcode_prefix/$translation_base_url/$langcode/edit", '/'));
         $this->assertFieldByName('translation[config_names][contact.form.feedback][label]', 'Website feedback - ' . $langcode);
@@ -400,14 +400,14 @@ public function testContactConfigEntityTranslation() {
 
     // Test that delete links work and operations perform properly.
     foreach ($this->langcodes as $langcode) {
-      $replacements = array('%label' => t('@label @entity_type', array('@label' => $label, '@entity_type' => Unicode::strtolower(t('Contact form')))), '@language' => \Drupal::languageManager()->getLanguage($langcode)->getName());
+      $replacements = ['%label' => t('@label @entity_type', ['@label' => $label, '@entity_type' => Unicode::strtolower(t('Contact form'))]), '@language' => \Drupal::languageManager()->getLanguage($langcode)->getName()];
 
       $this->drupalGet("$translation_base_url/$langcode/delete");
       $this->assertRaw(t('Are you sure you want to delete the @language translation of %label?', $replacements));
       // Assert link back to list page to cancel delete is present.
       $this->assertLinkByHref($translation_base_url);
 
-      $this->drupalPostForm(NULL, array(), t('Delete'));
+      $this->drupalPostForm(NULL, [], t('Delete'));
       $this->assertRaw(t('@language translation of %label was deleted', $replacements));
       $this->assertLinkByHref("$translation_base_url/$langcode/add");
       $this->assertNoLinkByHref("translation_base_url/$langcode/edit");
@@ -445,18 +445,18 @@ public function testDateFormatTranslation() {
     $this->assertLinkByHref('admin/config/regional/date-time/formats/manage/medium');
 
     // Save default language configuration for a new format.
-    $edit = array(
+    $edit = [
       'label' => 'Custom medium date',
       'id' => 'custom_medium',
       'date_format_pattern' => 'Y. m. d. H:i',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
 
     // Test translating a default shipped format and our custom format.
-    $formats = array(
+    $formats = [
       'medium' => 'Default medium date',
       'custom_medium' => 'Custom medium date',
-    );
+    ];
     foreach ($formats as $id => $label) {
       $translation_base_url = 'admin/config/regional/date-time/formats/manage/' . $id . '/translate';
 
@@ -474,20 +474,20 @@ public function testDateFormatTranslation() {
       $this->assertRaw('core/modules/system/js/system.date.js');
 
       // Update translatable fields.
-      $edit = array(
+      $edit = [
         'translation[config_names][core.date_format.' . $id . '][label]' => $id . ' - FR',
         'translation[config_names][core.date_format.' . $id . '][pattern]' => 'D',
-      );
+      ];
 
       // Save language specific version of form.
       $this->drupalPostForm($translation_page_url, $edit, t('Save translation'));
 
       // Get translation and check we've got the right value.
       $override = \Drupal::languageManager()->getLanguageConfigOverride('fr', 'core.date_format.' . $id);
-      $expected = array(
+      $expected = [
         'label' => $id . ' - FR',
         'pattern' => 'D',
-      );
+      ];
       $this->assertEqual($expected, $override->get());
 
       // Formatting the date 8 / 27 / 1985 @ 13:37 EST with pattern D should
@@ -508,18 +508,18 @@ public function testAccountSettingsConfigurationTranslation() {
     $this->drupalLogin($this->adminUser);
 
     $this->drupalGet('admin/config/people/accounts');
-    $this->assertLink(t('Translate @type', array('@type' => 'account settings')));
+    $this->assertLink(t('Translate @type', ['@type' => 'account settings']));
 
     $this->drupalGet('admin/config/people/accounts/translate');
-    $this->assertLink(t('Translate @type', array('@type' => 'account settings')));
+    $this->assertLink(t('Translate @type', ['@type' => 'account settings']));
     $this->assertLinkByHref('admin/config/people/accounts/translate/fr/add');
 
     // Update account settings fields for French.
-    $edit = array(
+    $edit = [
       'translation[config_names][user.settings][anonymous]' => 'Anonyme',
       'translation[config_names][user.mail][status_blocked][subject]' => 'Testing, your account is blocked.',
       'translation[config_names][user.mail][status_blocked][body]' => 'Testing account blocked body.',
-    );
+    ];
 
     $this->drupalPostForm('admin/config/people/accounts/translate/fr/add', $edit, t('Save translation'));
 
@@ -588,7 +588,7 @@ public function testViewsTranslationUI() {
     $this->drupalLogin($this->adminUser);
 
     // Assert contextual link related to views.
-    $ids = array('entity.view.edit_form:view=frontpage:location=page&name=frontpage&display_id=page_1');
+    $ids = ['entity.view.edit_form:view=frontpage:location=page&name=frontpage&display_id=page_1'];
     $response = $this->renderContextualLinks($ids, 'node');
     $this->assertResponse(200);
     $json = Json::decode($response);
@@ -611,14 +611,14 @@ public function testViewsTranslationUI() {
     $this->assertRaw($human_readable_name);
 
     // Update Views Fields for French.
-    $edit = array(
+    $edit = [
       'translation[config_names][views.view.frontpage][description]' => $description . " FR",
       'translation[config_names][views.view.frontpage][label]' => $human_readable_name . " FR",
       'translation[config_names][views.view.frontpage][display][default][display_title]' => $display_settings_master . " FR",
       'translation[config_names][views.view.frontpage][display][default][display_options][title]' => $display_options_master . " FR",
-    );
+    ];
     $this->drupalPostForm("$translation_base_url/fr/add", $edit, t('Save translation'));
-    $this->assertRaw(t('Successfully saved @language translation.', array('@language' => 'French')));
+    $this->assertRaw(t('Successfully saved @language translation.', ['@language' => 'French']));
 
     // Check for edit, delete links (and no 'add' link) for French language.
     $this->assertNoLinkByHref("$translation_base_url/fr/add");
@@ -640,20 +640,20 @@ public function testPluralConfigStringsSourceElements() {
     $this->drupalLogin($this->adminUser);
 
     // Languages to test, with various number of plural forms.
-    $languages = array(
-      'vi' => array('plurals' => 1, 'expected' => array(TRUE, FALSE, FALSE, FALSE)),
-      'fr' => array('plurals' => 2, 'expected' => array(TRUE, TRUE, FALSE, FALSE)),
-      'sl' => array('plurals' => 4, 'expected' => array(TRUE, TRUE, TRUE, TRUE)),
-    );
+    $languages = [
+      'vi' => ['plurals' => 1, 'expected' => [TRUE, FALSE, FALSE, FALSE]],
+      'fr' => ['plurals' => 2, 'expected' => [TRUE, TRUE, FALSE, FALSE]],
+      'sl' => ['plurals' => 4, 'expected' => [TRUE, TRUE, TRUE, TRUE]],
+    ];
 
     foreach ($languages as $langcode => $data) {
       // Import a .po file to add a new language with a given number of plural forms
       $name = \Drupal::service('file_system')->tempnam('temporary://', $langcode . '_') . '.po';
       file_put_contents($name, $this->getPoFile($data['plurals']));
-      $this->drupalPostForm('admin/config/regional/translate/import', array(
+      $this->drupalPostForm('admin/config/regional/translate/import', [
         'langcode' => $langcode,
         'files[file]' => $name,
-      ), t('Import'));
+      ], t('Import'));
 
       // Change the config langcode of the 'files' view.
       $config = \Drupal::service('config.factory')->getEditable('views.view.files');
@@ -686,10 +686,10 @@ public function testPluralConfigStrings() {
     // This will also automatically add the 'sl' language.
     $name = \Drupal::service('file_system')->tempnam('temporary://', "sl_") . '.po';
     file_put_contents($name, $this->getPoFile(4));
-    $this->drupalPostForm('admin/config/regional/translate/import', array(
+    $this->drupalPostForm('admin/config/regional/translate/import', [
       'langcode' => 'sl',
       'files[file]' => $name,
-    ), t('Import'));
+    ], t('Import'));
 
     // Translate the files view, as this one uses numeric formatters.
     $description = 'Singular form';
@@ -817,12 +817,12 @@ public function testLocaleDBStorage() {
 
     $langcode = 'xx';
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => Language::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
     // Make sure there is no translation stored in locale storage before edit.
@@ -830,9 +830,9 @@ public function testLocaleDBStorage() {
     $this->assertTrue(empty($translation));
 
     // Add custom translation.
-    $edit = array(
+    $edit = [
       'translation[config_names][user.settings][anonymous]' => 'Anonyme',
-    );
+    ];
     $this->drupalPostForm('admin/config/people/accounts/translate/fr/add', $edit, t('Save translation'));
 
     // Make sure translation stored in locale storage after saved language
@@ -841,9 +841,9 @@ public function testLocaleDBStorage() {
     $this->assertEqual('Anonyme', $translation->getString());
 
     // revert custom translations to base translation.
-    $edit = array(
+    $edit = [
       'translation[config_names][user.settings][anonymous]' => 'Anonymous',
-    );
+    ];
     $this->drupalPostForm('admin/config/people/accounts/translate/fr/edit', $edit, t('Save translation'));
 
     // Make sure there is no translation stored in locale storage after revert.
@@ -858,19 +858,19 @@ public function testSingleLanguageUI() {
     $this->drupalLogin($this->adminUser);
 
     // Delete French language
-    $this->drupalPostForm('admin/config/regional/language/delete/fr', array(), t('Delete'));
-    $this->assertRaw(t('The %language (%langcode) language has been removed.', array('%language' => 'French', '%langcode' => 'fr')));
+    $this->drupalPostForm('admin/config/regional/language/delete/fr', [], t('Delete'));
+    $this->assertRaw(t('The %language (%langcode) language has been removed.', ['%language' => 'French', '%langcode' => 'fr']));
 
     // Change default language to Tamil.
-    $edit = array(
+    $edit = [
       'site_default_language' => 'ta',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language', $edit, t('Save configuration'));
     $this->assertRaw(t('Configuration saved.'));
 
     // Delete English language
-    $this->drupalPostForm('admin/config/regional/language/delete/en', array(), t('Delete'));
-    $this->assertRaw(t('The %language (%langcode) language has been removed.', array('%language' => 'English', '%langcode' => 'en')));
+    $this->drupalPostForm('admin/config/regional/language/delete/en', [], t('Delete'));
+    $this->assertRaw(t('The %language (%langcode) language has been removed.', ['%language' => 'English', '%langcode' => 'en']));
 
     // Visit account setting translation page, this should not
     // throw any notices.
@@ -907,32 +907,32 @@ public function testSequenceTranslation() {
     /** @var \Drupal\Core\Config\ConfigFactoryInterface $config_factory */
     $config_factory = $this->container->get('config.factory');
 
-    $expected = array(
+    $expected = [
       'kitten',
       'llama',
       'elephant'
-    );
+    ];
     $actual = $config_factory
       ->getEditable('config_translation_test.content')
       ->get('animals');
     $this->assertEqual($expected, $actual);
 
-    $edit = array(
+    $edit = [
       'translation[config_names][config_translation_test.content][content][value]' => '<p><strong>Hello World</strong> - FR</p>',
       'translation[config_names][config_translation_test.content][animals][0]' => 'kitten - FR',
       'translation[config_names][config_translation_test.content][animals][1]' => 'llama - FR',
       'translation[config_names][config_translation_test.content][animals][2]' => 'elephant - FR',
-    );
+    ];
     $this->drupalPostForm('admin/config/media/file-system/translate/fr/add', $edit, t('Save translation'));
 
     $this->container->get('language.config_factory_override')
-      ->setLanguage(new Language(array('id' => 'fr')));
+      ->setLanguage(new Language(['id' => 'fr']));
 
-    $expected = array(
+    $expected = [
       'kitten - FR',
       'llama - FR',
       'elephant - FR',
-    );
+    ];
     $actual = $config_factory
       ->get('config_translation_test.content')
       ->get('animals');
@@ -947,10 +947,10 @@ public function testTextFormatTranslation() {
     /** @var \Drupal\Core\Config\ConfigFactoryInterface $config_factory */
     $config_factory = $this->container->get('config.factory');
 
-    $expected = array(
+    $expected = [
       'value' => '<p><strong>Hello World</strong></p>',
       'format' => 'plain_text',
-    );
+    ];
     $actual = $config_factory
       ->get('config_translation_test.content')
       ->getOriginal('content', FALSE);
@@ -970,20 +970,20 @@ public function testTextFormatTranslation() {
     $this->assertNoFieldByName('translation[config_names][config_translation_test.content][content][format]');
 
     // Update translatable fields.
-    $edit = array(
+    $edit = [
       'translation[config_names][config_translation_test.content][content][value]' => '<p><strong>Hello World</strong> - FR</p>',
-    );
+    ];
 
     // Save language specific version of form.
     $this->drupalPostForm($translation_page_url, $edit, t('Save translation'));
 
     // Get translation and check we've got the right value.
-    $expected = array(
+    $expected = [
       'value' => '<p><strong>Hello World</strong> - FR</p>',
       'format' => 'plain_text',
-    );
+    ];
     $this->container->get('language.config_factory_override')
-      ->setLanguage(new Language(array('id' => 'fr')));
+      ->setLanguage(new Language(['id' => 'fr']));
     $actual = $config_factory
       ->get('config_translation_test.content')
       ->get('content');
@@ -1009,7 +1009,7 @@ public function testTextFormatTranslation() {
     $this->drupalLogin($this->translatorUser);
     $this->drupalGet($translation_page_url);
     $this->assertDisabledTextarea('edit-translation-config-names-config-translation-testcontent-content-value');
-    $this->drupalPostForm(NULL, array(), t('Save translation'));
+    $this->drupalPostForm(NULL, [], t('Save translation'));
     // Check that submitting the form did not update the text format of the
     // translation.
     $actual = $config_factory
@@ -1019,14 +1019,14 @@ public function testTextFormatTranslation() {
 
     // The administrator must explicitly change the text format.
     $this->drupalLogin($this->adminUser);
-    $edit = array(
+    $edit = [
       'translation[config_names][config_translation_test.content][content][format]' => 'full_html',
-    );
+    ];
     $this->drupalPostForm($translation_page_url, $edit, t('Save translation'));
-    $expected = array(
+    $expected = [
       'value' => '<p><strong>Hello World</strong> - FR</p>',
       'format' => 'full_html',
-    );
+    ];
     $actual = $config_factory
       ->get('config_translation_test.content')
       ->get('content');
@@ -1047,20 +1047,20 @@ public function testTextFormatTranslation() {
    *   Returns translation if exists, FALSE otherwise.
    */
   protected function getTranslation($config_name, $key, $langcode) {
-    $settings_locations = $this->localeStorage->getLocations(array('type' => 'configuration', 'name' => $config_name));
-    $this->assertTrue(!empty($settings_locations), format_string('Configuration locations found for %config_name.', array('%config_name' => $config_name)));
+    $settings_locations = $this->localeStorage->getLocations(['type' => 'configuration', 'name' => $config_name]);
+    $this->assertTrue(!empty($settings_locations), format_string('Configuration locations found for %config_name.', ['%config_name' => $config_name]));
 
     if (!empty($settings_locations)) {
       $source = $this->container->get('config.factory')->get($config_name)->get($key);
-      $source_string = $this->localeStorage->findString(array('source' => $source, 'type' => 'configuration'));
-      $this->assertTrue(!empty($source_string), format_string('Found string for %config_name.%key.', array('%config_name' => $config_name, '%key' => $key)));
+      $source_string = $this->localeStorage->findString(['source' => $source, 'type' => 'configuration']);
+      $this->assertTrue(!empty($source_string), format_string('Found string for %config_name.%key.', ['%config_name' => $config_name, '%key' => $key]));
 
       if (!empty($source_string)) {
-        $conditions = array(
+        $conditions = [
           'lid' => $source_string->lid,
           'language' => $langcode,
-        );
-        $translations = $this->localeStorage->getTranslations($conditions + array('translated' => TRUE));
+        ];
+        $translations = $this->localeStorage->getTranslations($conditions + ['translated' => TRUE]);
         return reset($translations);
       }
     }
@@ -1074,10 +1074,10 @@ protected function getTranslation($config_name, $key, $langcode) {
    * @param string $site_slogan
    */
   protected function setSiteInformation($site_name, $site_slogan) {
-    $edit = array(
+    $edit = [
       'site_name' => $site_name,
       'site_slogan' => $site_slogan,
-    );
+    ];
     $this->drupalPostForm('admin/config/system/site-information', $edit, t('Save configuration'));
     $this->assertRaw(t('The configuration options have been saved.'));
   }
@@ -1094,11 +1094,11 @@ protected function setSiteInformation($site_name, $site_slogan) {
    *   The response body.
    */
   protected function renderContextualLinks($ids, $current_path) {
-    $post = array();
+    $post = [];
     for ($i = 0; $i < count($ids); $i++) {
       $post['ids[' . $i . ']'] = $ids[$i];
     }
-    return $this->drupalPostWithFormat('contextual/render', 'json', $post, array('query' => array('destination' => $current_path)));
+    return $this->drupalPostWithFormat('contextual/render', 'json', $post, ['query' => ['destination' => $current_path]]);
   }
 
   /**
@@ -1111,30 +1111,30 @@ protected function renderContextualLinks($ids, $current_path) {
    *   TRUE if the assertion passed; FALSE otherwise.
    */
   protected function assertDisabledTextarea($id) {
-    $textarea = $this->xpath('//textarea[@id=:id and contains(@disabled, "disabled")]', array(
+    $textarea = $this->xpath('//textarea[@id=:id and contains(@disabled, "disabled")]', [
       ':id' => $id,
-    ));
+    ]);
     $textarea = reset($textarea);
-    $passed = $this->assertTrue($textarea instanceof \SimpleXMLElement, SafeMarkup::format('Disabled field @id exists.', array(
+    $passed = $this->assertTrue($textarea instanceof \SimpleXMLElement, SafeMarkup::format('Disabled field @id exists.', [
       '@id' => $id,
-    )));
+    ]));
     $expected = 'This field has been disabled because you do not have sufficient permissions to edit it.';
-    $passed = $passed && $this->assertEqual((string) $textarea, $expected, SafeMarkup::format('Disabled textarea @id hides text in an inaccessible text format.', array(
+    $passed = $passed && $this->assertEqual((string) $textarea, $expected, SafeMarkup::format('Disabled textarea @id hides text in an inaccessible text format.', [
       '@id' => $id,
-    )));
+    ]));
     // Make sure the text format select is not shown.
     $select_id = str_replace('value', 'format--2', $id);
-    $select = $this->xpath('//select[@id=:id]', array(':id' => $select_id));
-    return $passed && $this->assertFalse($select, SafeMarkup::format('Field @id does not exist.', array(
+    $select = $this->xpath('//select[@id=:id]', [':id' => $select_id]);
+    return $passed && $this->assertFalse($select, SafeMarkup::format('Field @id does not exist.', [
       '@id' => $id,
-    )));
+    ]));
   }
 
   /**
    * Helper function that returns a .po file with a given number of plural forms.
    */
   public function getPoFile($plurals) {
-    $po_file = array();
+    $po_file = [];
 
     $po_file[1] = <<< EOF
 msgid ""
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiThemeTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationUiThemeTest.php
index ab51a43efaabaf8198c6f37fb27121d44843eb85..53713a92384703e13495405f3c7a2c493a9cbc25 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiThemeTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationUiThemeTest.php
@@ -24,7 +24,7 @@ class ConfigTranslationUiThemeTest extends WebTestBase {
    *
    * @var array
    */
-  protected $langcodes = array('fr', 'ta');
+  protected $langcodes = ['fr', 'ta'];
 
   /**
    * Administrator user for tests.
diff --git a/core/modules/config_translation/tests/modules/config_translation_test/config_translation_test.module b/core/modules/config_translation/tests/modules/config_translation_test/config_translation_test.module
index eb41793ab4fec12645771406a74760f4bb29ca47..8c00b90d05b95ace72b95e1fe22681787faae24f 100644
--- a/core/modules/config_translation/tests/modules/config_translation_test/config_translation_test.module
+++ b/core/modules/config_translation/tests/modules/config_translation_test/config_translation_test.module
@@ -33,7 +33,7 @@ function config_translation_test_entity_type_alter(array &$entity_types) {
 function config_translation_test_config_translation_info_alter(&$info) {
   if (\Drupal::state()->get('config_translation_test_config_translation_info_alter')) {
     // Limit account settings config files to only one of them.
-    $info['entity.user.admin_form']['names'] = array('user.settings');
+    $info['entity.user.admin_form']['names'] = ['user.settings'];
 
     // Add one more config file to the site information page.
     $info['system.site_information_settings']['names'][] = 'system.rss';
diff --git a/core/modules/config_translation/tests/src/Functional/ConfigTranslationDateFormatUiTest.php b/core/modules/config_translation/tests/src/Functional/ConfigTranslationDateFormatUiTest.php
index 9ddbdf3a91731f6e227336d4cc2317ec414c690b..95af49eea92f79147345c67c75e5ad2f0b535452 100644
--- a/core/modules/config_translation/tests/src/Functional/ConfigTranslationDateFormatUiTest.php
+++ b/core/modules/config_translation/tests/src/Functional/ConfigTranslationDateFormatUiTest.php
@@ -12,11 +12,11 @@
  */
 class ConfigTranslationDateFormatUiTest extends BrowserTestBase {
 
-  public static $modules = array(
+  public static $modules = [
     'language',
     'config_translation',
     'system'
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
@@ -27,10 +27,10 @@ protected function setUp() {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
 
-    $user = $this->drupalCreateUser(array(
+    $user = $this->drupalCreateUser([
       'administer site configuration',
       'translate configuration',
-    ));
+    ]);
     $this->drupalLogin($user);
   }
 
diff --git a/core/modules/config_translation/tests/src/Functional/ConfigTranslationListUiTest.php b/core/modules/config_translation/tests/src/Functional/ConfigTranslationListUiTest.php
index db4af565bc8e91086d09b92ee60627d7ba5883f0..586d1975799c8906ded84a302834f6f643047c0d 100644
--- a/core/modules/config_translation/tests/src/Functional/ConfigTranslationListUiTest.php
+++ b/core/modules/config_translation/tests/src/Functional/ConfigTranslationListUiTest.php
@@ -26,7 +26,7 @@ class ConfigTranslationListUiTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'block',
     'config_translation',
     'contact',
@@ -40,7 +40,7 @@ class ConfigTranslationListUiTest extends BrowserTestBase {
     'image',
     'responsive_image',
     'toolbar',
-  );
+  ];
 
   /**
    * Admin user with all needed permissions.
@@ -52,7 +52,7 @@ class ConfigTranslationListUiTest extends BrowserTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $permissions = array(
+    $permissions = [
       'access site-wide contact form',
       'administer blocks',
       'administer contact forms',
@@ -70,7 +70,7 @@ protected function setUp() {
       'administer image styles',
       'administer responsive images',
       'translate configuration',
-    );
+    ];
 
     // Create and log in user.
     $this->adminUser = $this->drupalCreateUser($permissions);
@@ -94,7 +94,7 @@ protected function doBlockListTest() {
     // Add a test block, any block will do.
     // Set the machine name so the translate link can be built later.
     $id = Unicode::strtolower($this->randomMachineName(16));
-    $this->drupalPlaceBlock('system_powered_by_block', array('id' => $id));
+    $this->drupalPlaceBlock('system_powered_by_block', ['id' => $id]);
 
     // Get the Block listing.
     $this->drupalGet('admin/structure/block');
@@ -118,11 +118,11 @@ protected function doMenuListTest() {
     // Lowercase the machine name.
     $menu_name = Unicode::strtolower($this->randomMachineName(16));
     $label = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'id' => $menu_name,
       'description' => '',
       'label' => $label,
-    );
+    ];
     // Create the menu by posting the form.
     $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
 
@@ -135,9 +135,9 @@ protected function doMenuListTest() {
 
     // Check if the Link is not added if you are missing 'translate
     // configuration' permission.
-    $permissions = array(
+    $permissions = [
       'administer menu',
-    );
+    ];
     $this->drupalLogin($this->drupalCreateUser($permissions));
 
     // Get the Menu listing.
@@ -186,11 +186,11 @@ protected function doVocabularyListTest() {
   public function doCustomContentTypeListTest() {
     // Create a test custom block type to decouple looking for translate
     // operations link so this does not test more than necessary.
-    $block_content_type = BlockContentType::create(array(
+    $block_content_type = BlockContentType::create([
       'id' => Unicode::strtolower($this->randomMachineName(16)),
       'label' => $this->randomMachineName(),
       'revision' => FALSE
-    ));
+    ]);
     $block_content_type->save();
 
     // Get the custom block type listing.
@@ -235,10 +235,10 @@ public function doContactFormsListTest() {
   public function doContentTypeListTest() {
     // Create a test content type to decouple looking for translate operations
     // link so this does not test more than necessary.
-    $content_type = $this->drupalCreateContentType(array(
+    $content_type = $this->drupalCreateContentType([
       'type' => Unicode::strtolower($this->randomMachineName(16)),
       'name' => $this->randomMachineName(),
-    ));
+    ]);
 
     // Get the content type listing.
     $this->drupalGet('admin/structure/types');
@@ -258,10 +258,10 @@ public function doContentTypeListTest() {
   public function doFormatsListTest() {
     // Create a test format to decouple looking for translate operations
     // link so this does not test more than necessary.
-    $filter_format = FilterFormat::create(array(
+    $filter_format = FilterFormat::create([
       'format' => Unicode::strtolower($this->randomMachineName(16)),
       'name' => $this->randomMachineName(),
-    ));
+    ]);
     $filter_format->save();
 
     // Get the format listing.
@@ -282,10 +282,10 @@ public function doFormatsListTest() {
   public function doShortcutListTest() {
     // Create a test shortcut to decouple looking for translate operations
     // link so this does not test more than necessary.
-    $shortcut = ShortcutSet::create(array(
+    $shortcut = ShortcutSet::create([
       'id' => Unicode::strtolower($this->randomMachineName(16)),
       'label' => $this->randomString(),
-    ));
+    ]);
     $shortcut->save();
 
     // Get the shortcut listing.
@@ -307,7 +307,7 @@ public function doUserRoleListTest() {
     // Create a test role to decouple looking for translate operations
     // link so this does not test more than necessary.
     $role_id = Unicode::strtolower($this->randomMachineName(16));
-    $this->drupalCreateRole(array(), $role_id);
+    $this->drupalCreateRole([], $role_id);
 
     // Get the role listing.
     $this->drupalGet('admin/people/roles');
@@ -361,13 +361,13 @@ public function doImageStyleListTest() {
    * Tests the responsive image mapping listing for the translate operation.
    */
   public function doResponsiveImageListTest() {
-    $edit = array();
+    $edit = [];
     $edit['label'] = $this->randomMachineName();
     $edit['id'] = strtolower($edit['label']);
     $edit['fallback_image_style'] = 'thumbnail';
 
     $this->drupalPostForm('admin/config/media/responsive-image-style/add', $edit, t('Save'));
-    $this->assertRaw(t('Responsive image style %label saved.', array('%label' => $edit['label'])));
+    $this->assertRaw(t('Responsive image style %label saved.', ['%label' => $edit['label']]));
 
     // Get the responsive image style listing.
     $this->drupalGet('admin/config/media/responsive-image-style');
@@ -386,17 +386,17 @@ public function doResponsiveImageListTest() {
    */
   public function doFieldListTest() {
     // Create a base content type.
-    $content_type = $this->drupalCreateContentType(array(
+    $content_type = $this->drupalCreateContentType([
       'type' => Unicode::strtolower($this->randomMachineName(16)),
       'name' => $this->randomMachineName(),
-    ));
+    ]);
 
     // Create a block content type.
-    $block_content_type = BlockContentType::create(array(
+    $block_content_type = BlockContentType::create([
       'id' => 'basic',
       'label' => 'Basic',
       'revision' => FALSE
-    ));
+    ]);
     $block_content_type->save();
     $field = FieldConfig::create([
       // The field storage is guaranteed to exist because it is supplied by the
@@ -404,21 +404,21 @@ public function doFieldListTest() {
       'field_storage' => FieldStorageConfig::loadByName('block_content', 'body'),
       'bundle' => $block_content_type->id(),
       'label' => 'Body',
-      'settings' => array('display_summary' => FALSE),
+      'settings' => ['display_summary' => FALSE],
     ]);
     $field->save();
 
     // Look at a few fields on a few entity types.
-    $pages = array(
-      array(
+    $pages = [
+      [
         'list' => 'admin/structure/types/manage/' . $content_type->id() . '/fields',
         'field' => 'node.' . $content_type->id() . '.body',
-      ),
-      array(
+      ],
+      [
         'list' => 'admin/structure/block/block-content/manage/basic/fields',
         'field' => 'block_content.basic.body',
-      ),
-    );
+      ],
+    ];
 
     foreach ($pages as $values) {
       // Get fields listing.
diff --git a/core/modules/config_translation/tests/src/Functional/ConfigTranslationViewListUiTest.php b/core/modules/config_translation/tests/src/Functional/ConfigTranslationViewListUiTest.php
index 9a9aee3d266741b08fc931051175d849dc5bc763..066dcd52bdc0c2dff38979d063c87bf705f6ce69 100644
--- a/core/modules/config_translation/tests/src/Functional/ConfigTranslationViewListUiTest.php
+++ b/core/modules/config_translation/tests/src/Functional/ConfigTranslationViewListUiTest.php
@@ -16,22 +16,22 @@ class ConfigTranslationViewListUiTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('node', 'test_view');
+  public static $testViews = ['node', 'test_view'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('config_translation', 'views_ui');
+  public static $modules = ['config_translation', 'views_ui'];
 
   protected function setUp() {
     parent::setUp();
 
-    $permissions = array(
+    $permissions = [
       'administer views',
       'translate configuration',
-    );
+    ];
 
     // Create and log in user.
     $this->drupalLogin($this->drupalCreateUser($permissions));
diff --git a/core/modules/config_translation/tests/src/Unit/ConfigEntityMapperTest.php b/core/modules/config_translation/tests/src/Unit/ConfigEntityMapperTest.php
index dc56e8db91a6fb510ab4dad68d1a7248fe718a31..11e72c2dff3da7919644849407c3bcec7601a4a0 100644
--- a/core/modules/config_translation/tests/src/Unit/ConfigEntityMapperTest.php
+++ b/core/modules/config_translation/tests/src/Unit/ConfigEntityMapperTest.php
@@ -62,14 +62,14 @@ protected function setUp() {
       ->with('entity.configurable_language.edit_form')
       ->will($this->returnValue(new Route('/admin/config/regional/language/edit/{configurable_language}')));
 
-    $definition = array(
+    $definition = [
       'class' => '\Drupal\config_translation\ConfigEntityMapper',
       'base_route_name' => 'entity.configurable_language.edit_form',
       'title' => '@label language',
-      'names' => array(),
+      'names' => [],
       'entity_type' => 'configurable_language',
       'route_name' => 'config_translation.item.overview.entity.configurable_language.edit_form',
-    );
+    ];
 
     $typed_config_manager = $this->getMock('Drupal\Core\Config\TypedConfigManagerInterface');
 
@@ -152,7 +152,7 @@ public function testGetOverviewRouteParameters() {
 
     $result = $this->configEntityMapper->getOverviewRouteParameters();
 
-    $this->assertSame(array('configurable_language' => 'entity_id'), $result);
+    $this->assertSame(['configurable_language' => 'entity_id'], $result);
   }
 
   /**
@@ -205,12 +205,12 @@ public function testGetTypeLabel() {
   public function testGetOperations() {
     $result = $this->configEntityMapper->getOperations();
 
-    $expected = array(
-      'list' => array(
+    $expected = [
+      'list' => [
         'title' => 'List',
         'url' => Url::fromRoute('config_translation.entity_list', ['mapper_id' => 'configurable_language']),
-      ),
-    );
+      ],
+    ];
 
     $this->assertEquals($expected, $result);
   }
diff --git a/core/modules/config_translation/tests/src/Unit/ConfigFieldMapperTest.php b/core/modules/config_translation/tests/src/Unit/ConfigFieldMapperTest.php
index 204d84e1ed51c28140dc125496fc099221f4aab3..8e6d0b903b6912294fa18f16239c7da81c707f3b 100644
--- a/core/modules/config_translation/tests/src/Unit/ConfigFieldMapperTest.php
+++ b/core/modules/config_translation/tests/src/Unit/ConfigFieldMapperTest.php
@@ -42,13 +42,13 @@ protected function setUp() {
     $this->entityManager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
     $this->entity = $this->getMock('Drupal\field\FieldConfigInterface');
 
-    $definition = array(
+    $definition = [
       'class' => '\Drupal\config_translation\ConfigFieldMapper',
       'base_route_name' => 'entity.field_config.node_field_edit_form',
       'title' => '@label field',
-      'names' => array(),
+      'names' => [],
       'entity_type' => 'field_config',
-    );
+    ];
 
     $locale_config_manager = $this->getMockBuilder('Drupal\locale\LocaleConfigManager')
       ->disableOriginalConstructor()
diff --git a/core/modules/config_translation/tests/src/Unit/ConfigMapperManagerTest.php b/core/modules/config_translation/tests/src/Unit/ConfigMapperManagerTest.php
index 10bbf7da88733115257a24ffc8693e8b23cce92e..9f064aca217a85cca591f6045e0d6064cd98c3ae 100644
--- a/core/modules/config_translation/tests/src/Unit/ConfigMapperManagerTest.php
+++ b/core/modules/config_translation/tests/src/Unit/ConfigMapperManagerTest.php
@@ -31,7 +31,7 @@ class ConfigMapperManagerTest extends UnitTestCase {
   protected $typedConfigManager;
 
   protected function setUp() {
-    $language = new Language(array('id' => 'en'));
+    $language = new Language(['id' => 'en']);
     $language_manager = $this->getMock('Drupal\Core\Language\LanguageManagerInterface');
     $language_manager->expects($this->once())
       ->method('getCurrentLanguage')
@@ -83,50 +83,50 @@ public function testHasTranslatable(TypedDataInterface $element, $expected) {
    *   ConfigMapperManager::hasTranslatable() as the second key.
    */
   public function providerTestHasTranslatable() {
-    return array(
-      array($this->getElement(array()), FALSE),
-      array($this->getElement(array('aaa' => 'bbb')), FALSE),
-      array($this->getElement(array('translatable' => FALSE)), FALSE),
-      array($this->getElement(array('translatable' => TRUE)), TRUE),
-      array($this->getNestedElement(array(
-        $this->getElement(array()),
-      )), FALSE),
-      array($this->getNestedElement(array(
-        $this->getElement(array('translatable' => TRUE)),
-      )), TRUE),
-      array($this->getNestedElement(array(
-        $this->getElement(array('aaa' => 'bbb')),
-        $this->getElement(array('ccc' => 'ddd')),
-        $this->getElement(array('eee' => 'fff')),
-      )), FALSE),
-      array($this->getNestedElement(array(
-        $this->getElement(array('aaa' => 'bbb')),
-        $this->getElement(array('ccc' => 'ddd')),
-        $this->getElement(array('translatable' => TRUE)),
-      )), TRUE),
-      array($this->getNestedElement(array(
-        $this->getElement(array('aaa' => 'bbb')),
-        $this->getNestedElement(array(
-          $this->getElement(array('ccc' => 'ddd')),
-          $this->getElement(array('eee' => 'fff')),
-        )),
-        $this->getNestedElement(array(
-          $this->getElement(array('ggg' => 'hhh')),
-          $this->getElement(array('iii' => 'jjj')),
-        )),
-      )), FALSE),
-      array($this->getNestedElement(array(
-        $this->getElement(array('aaa' => 'bbb')),
-        $this->getNestedElement(array(
-          $this->getElement(array('ccc' => 'ddd')),
-          $this->getElement(array('eee' => 'fff')),
-        )),
-        $this->getNestedElement(array(
-          $this->getElement(array('ggg' => 'hhh')),
-          $this->getElement(array('translatable' => TRUE)),
-        )),
-      )), TRUE),
-    );
+    return [
+      [$this->getElement([]), FALSE],
+      [$this->getElement(['aaa' => 'bbb']), FALSE],
+      [$this->getElement(['translatable' => FALSE]), FALSE],
+      [$this->getElement(['translatable' => TRUE]), TRUE],
+      [$this->getNestedElement([
+        $this->getElement([]),
+      ]), FALSE],
+      [$this->getNestedElement([
+        $this->getElement(['translatable' => TRUE]),
+      ]), TRUE],
+      [$this->getNestedElement([
+        $this->getElement(['aaa' => 'bbb']),
+        $this->getElement(['ccc' => 'ddd']),
+        $this->getElement(['eee' => 'fff']),
+      ]), FALSE],
+      [$this->getNestedElement([
+        $this->getElement(['aaa' => 'bbb']),
+        $this->getElement(['ccc' => 'ddd']),
+        $this->getElement(['translatable' => TRUE]),
+      ]), TRUE],
+      [$this->getNestedElement([
+        $this->getElement(['aaa' => 'bbb']),
+        $this->getNestedElement([
+          $this->getElement(['ccc' => 'ddd']),
+          $this->getElement(['eee' => 'fff']),
+        ]),
+        $this->getNestedElement([
+          $this->getElement(['ggg' => 'hhh']),
+          $this->getElement(['iii' => 'jjj']),
+        ]),
+      ]), FALSE],
+      [$this->getNestedElement([
+        $this->getElement(['aaa' => 'bbb']),
+        $this->getNestedElement([
+          $this->getElement(['ccc' => 'ddd']),
+          $this->getElement(['eee' => 'fff']),
+        ]),
+        $this->getNestedElement([
+          $this->getElement(['ggg' => 'hhh']),
+          $this->getElement(['translatable' => TRUE]),
+        ]),
+      ]), TRUE],
+    ];
   }
 
   /**
diff --git a/core/modules/config_translation/tests/src/Unit/ConfigNamesMapperTest.php b/core/modules/config_translation/tests/src/Unit/ConfigNamesMapperTest.php
index cbf42c809cc28e41a27c51fc5cbdeadbefec6912..e7a06794f8f8b1d597c4b1e8898b6afd1e5881c6 100644
--- a/core/modules/config_translation/tests/src/Unit/ConfigNamesMapperTest.php
+++ b/core/modules/config_translation/tests/src/Unit/ConfigNamesMapperTest.php
@@ -91,13 +91,13 @@ class ConfigNamesMapperTest extends UnitTestCase {
   protected function setUp() {
     $this->routeProvider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
 
-    $this->pluginDefinition = array(
+    $this->pluginDefinition = [
       'class' => '\Drupal\config_translation\ConfigNamesMapper',
       'base_route_name' => 'system.site_information_settings',
       'title' => 'System information',
-      'names' => array('system.site'),
+      'names' => ['system.site'],
       'weight' => 42,
-    );
+    ];
 
     $this->typedConfigManager = $this->getMock('Drupal\Core\Config\TypedConfigManagerInterface');
 
@@ -156,7 +156,7 @@ public function testGetBaseRouteName() {
    */
   public function testGetBaseRouteParameters() {
     $result = $this->configNamesMapper->getBaseRouteParameters();
-    $this->assertSame(array(), $result);
+    $this->assertSame([], $result);
   }
 
   /**
@@ -193,7 +193,7 @@ public function testGetOverviewRouteName() {
    */
   public function testGetOverviewRouteParameters() {
     $result = $this->configNamesMapper->getOverviewRouteParameters();
-    $this->assertSame(array(), $result);
+    $this->assertSame([], $result);
   }
 
   /**
@@ -201,13 +201,13 @@ public function testGetOverviewRouteParameters() {
    */
   public function testGetOverviewRoute() {
     $expected = new Route('/admin/config/system/site-information/translate',
-      array(
+      [
         '_controller' => '\Drupal\config_translation\Controller\ConfigTranslationController::itemPage',
         'plugin_id' => 'system.site_information_settings',
-      ),
-      array(
+      ],
+      [
         '_config_translation_overview_access' => 'TRUE',
-      )
+      ]
     );
     $result = $this->configNamesMapper->getOverviewRoute();
     $this->assertSame(serialize($expected), serialize($result));
@@ -242,7 +242,7 @@ public function testGetAddRouteParameters() {
     $route_match = new RouteMatch('example', new Route('/test/{langcode}'), ['langcode' => 'xx']);
     $this->configNamesMapper->populateFromRouteMatch($route_match);
 
-    $expected = array('langcode' => 'xx');
+    $expected = ['langcode' => 'xx'];
     $result = $this->configNamesMapper->getAddRouteParameters();
     $this->assertSame($expected, $result);
   }
@@ -252,13 +252,13 @@ public function testGetAddRouteParameters() {
    */
   public function testGetAddRoute() {
     $expected = new Route('/admin/config/system/site-information/translate/{langcode}/add',
-      array(
+      [
         '_form' => '\Drupal\config_translation\Form\ConfigTranslationAddForm',
         'plugin_id' => 'system.site_information_settings',
-      ),
-      array(
+      ],
+      [
         '_config_translation_form_access' => 'TRUE',
-      )
+      ]
     );
     $result = $this->configNamesMapper->getAddRoute();
     $this->assertSame(serialize($expected), serialize($result));
@@ -280,7 +280,7 @@ public function testGetEditRouteParameters() {
     $route_match = new RouteMatch('example', new Route('/test/{langcode}'), ['langcode' => 'xx']);
     $this->configNamesMapper->populateFromRouteMatch($route_match);
 
-    $expected = array('langcode' => 'xx');
+    $expected = ['langcode' => 'xx'];
     $result = $this->configNamesMapper->getEditRouteParameters();
     $this->assertSame($expected, $result);
   }
@@ -290,13 +290,13 @@ public function testGetEditRouteParameters() {
    */
   public function testGetEditRoute() {
     $expected = new Route('/admin/config/system/site-information/translate/{langcode}/edit',
-      array(
+      [
         '_form' => '\Drupal\config_translation\Form\ConfigTranslationEditForm',
         'plugin_id' => 'system.site_information_settings',
-      ),
-      array(
+      ],
+      [
         '_config_translation_form_access' => 'TRUE',
-      )
+      ]
     );
     $result = $this->configNamesMapper->getEditRoute();
     $this->assertSame(serialize($expected), serialize($result));
@@ -318,7 +318,7 @@ public function testGetDeleteRouteParameters() {
     $route_match = new RouteMatch('example', new Route('/test/{langcode}'), ['langcode' => 'xx']);
     $this->configNamesMapper->populateFromRouteMatch($route_match);
 
-    $expected = array('langcode' => 'xx');    $result = $this->configNamesMapper->getDeleteRouteParameters();
+    $expected = ['langcode' => 'xx'];    $result = $this->configNamesMapper->getDeleteRouteParameters();
     $this->assertSame($expected, $result);
   }
 
@@ -327,13 +327,13 @@ public function testGetDeleteRouteParameters() {
    */
   public function testGetDeleteRoute() {
     $expected = new Route('/admin/config/system/site-information/translate/{langcode}/delete',
-      array(
+      [
         '_form' => '\Drupal\config_translation\Form\ConfigTranslationDeleteForm',
         'plugin_id' => 'system.site_information_settings',
-      ),
-      array(
+      ],
+      [
         '_config_translation_form_access' => 'TRUE',
-      )
+      ]
     );
     $result = $this->configNamesMapper->getDeleteRoute();
     $this->assertSame(serialize($expected), serialize($result));
@@ -403,38 +403,38 @@ public function testGetTypeLabel() {
   public function testGetLangcode() {
     // Test that the getLangcode() falls back to 'en', if no explicit language
     // code is provided.
-    $config_factory = $this->getConfigFactoryStub(array(
-      'system.site' => array('key' => 'value'),
-    ));
+    $config_factory = $this->getConfigFactoryStub([
+      'system.site' => ['key' => 'value'],
+    ]);
     $this->configNamesMapper->setConfigFactory($config_factory);
     $result = $this->configNamesMapper->getLangcode();
     $this->assertSame('en', $result);
 
     // Test that getLangcode picks up the language code provided by the
     // configuration.
-    $config_factory = $this->getConfigFactoryStub(array(
-      'system.site' => array('langcode' => 'xx'),
-    ));
+    $config_factory = $this->getConfigFactoryStub([
+      'system.site' => ['langcode' => 'xx'],
+    ]);
     $this->configNamesMapper->setConfigFactory($config_factory);
     $result = $this->configNamesMapper->getLangcode();
     $this->assertSame('xx', $result);
 
     // Test that getLangcode() works for multiple configuration names.
     $this->configNamesMapper->addConfigName('system.maintenance');
-    $config_factory = $this->getConfigFactoryStub(array(
-      'system.site' => array('langcode' => 'xx'),
-      'system.maintenance' => array('langcode' => 'xx'),
-    ));
+    $config_factory = $this->getConfigFactoryStub([
+      'system.site' => ['langcode' => 'xx'],
+      'system.maintenance' => ['langcode' => 'xx'],
+    ]);
     $this->configNamesMapper->setConfigFactory($config_factory);
     $result = $this->configNamesMapper->getLangcode();
     $this->assertSame('xx', $result);
 
     // Test that getLangcode() throws an exception when different language codes
     // are given.
-    $config_factory = $this->getConfigFactoryStub(array(
-      'system.site' => array('langcode' => 'xx'),
-      'system.maintenance' => array('langcode' => 'yy'),
-    ));
+    $config_factory = $this->getConfigFactoryStub([
+      'system.site' => ['langcode' => 'xx'],
+      'system.maintenance' => ['langcode' => 'yy'],
+    ]);
     $this->configNamesMapper->setConfigFactory($config_factory);
     try {
       $this->configNamesMapper->getLangcode();
@@ -448,22 +448,22 @@ public function testGetLangcode() {
    * Tests ConfigNamesMapper::getConfigData().
    */
   public function testGetConfigData() {
-    $configs = array(
-      'system.site' => array(
+    $configs = [
+      'system.site' => [
         'name' => 'Drupal',
         'slogan' => 'Come for the software, stay for the community!',
-      ),
-      'system.maintenance' => array(
+      ],
+      'system.maintenance' => [
         'enabled' => FALSE,
         'message' => '@site is currently under maintenance.',
-      ),
-      'system.rss' => array(
-        'items' => array(
+      ],
+      'system.rss' => [
+        'items' => [
           'limit' => 10,
           'view_mode' => 'rss',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     $this->configNamesMapper->setConfigNames(array_keys($configs));
     $config_factory = $this->getConfigFactoryStub($configs);
@@ -489,9 +489,9 @@ public function testHasSchema(array $mock_return_values, $expected) {
     $config_names = range(1, count($mock_return_values));
     $this->configNamesMapper->setConfigNames($config_names);
 
-    $map = array();
+    $map = [];
     foreach ($config_names as $i => $config_name) {
-      $map[] = array($config_name, $mock_return_values[$i]);
+      $map[] = [$config_name, $mock_return_values[$i]];
     }
     $this->typedConfigManager
       ->expects($this->any())
@@ -512,12 +512,12 @@ public function testHasSchema(array $mock_return_values, $expected) {
    *   ConfigNamesMapper::hasSchema() as the second value.
    */
   public function providerTestHasSchema() {
-    return array(
-      array(array(TRUE), TRUE),
-      array(array(FALSE), FALSE),
-      array(array(TRUE, TRUE, TRUE), TRUE),
-      array(array(TRUE, FALSE, TRUE), FALSE),
-    );
+    return [
+      [[TRUE], TRUE],
+      [[FALSE], FALSE],
+      [[TRUE, TRUE, TRUE], TRUE],
+      [[TRUE, FALSE, TRUE], FALSE],
+    ];
   }
 
   /**
@@ -536,9 +536,9 @@ public function testHasTranslatable(array $mock_return_values, $expected) {
     $config_names = range(1, count($mock_return_values));
     $this->configNamesMapper->setConfigNames($config_names);
 
-    $map = array();
+    $map = [];
     foreach ($config_names as $i => $config_name) {
-      $map[] = isset($mock_return_values[$i]) ? array($config_name, $mock_return_values[$i]) : array();
+      $map[] = isset($mock_return_values[$i]) ? [$config_name, $mock_return_values[$i]] : [];
     }
     $this->configMapperManager
       ->expects($this->any())
@@ -559,14 +559,14 @@ public function testHasTranslatable(array $mock_return_values, $expected) {
    *   ConfigNamesMapper::hasTranslatable() as the second value.
    */
   public function providerTestHasTranslatable() {
-    return array(
-      array(array(), FALSE),
-      array(array(TRUE), TRUE),
-      array(array(FALSE), FALSE),
-      array(array(TRUE, TRUE, TRUE), TRUE),
-      array(array(FALSE, FALSE, FALSE), FALSE),
-      array(array(TRUE, FALSE, TRUE), TRUE),
-    );
+    return [
+      [[], FALSE],
+      [[TRUE], TRUE],
+      [[FALSE], FALSE],
+      [[TRUE, TRUE, TRUE], TRUE],
+      [[FALSE, FALSE, FALSE], FALSE],
+      [[TRUE, FALSE, TRUE], TRUE],
+    ];
   }
 
   /**
@@ -587,9 +587,9 @@ public function testHasTranslation(array $mock_return_values, $expected) {
     $config_names = range(1, count($mock_return_values));
     $this->configNamesMapper->setConfigNames($config_names);
 
-    $map = array();
+    $map = [];
     foreach ($config_names as $i => $config_name) {
-      $map[] = array($config_name, $language->getId(), $mock_return_values[$i]);
+      $map[] = [$config_name, $language->getId(), $mock_return_values[$i]];
     }
     $this->localeConfigManager
       ->expects($this->any())
@@ -610,13 +610,13 @@ public function testHasTranslation(array $mock_return_values, $expected) {
    *   ConfigNamesMapper::hasTranslation() as the second value.
    */
   public function providerTestHasTranslation() {
-    return array(
-      array(array(TRUE), TRUE),
-      array(array(FALSE), FALSE),
-      array(array(TRUE, TRUE, TRUE), TRUE),
-      array(array(FALSE, FALSE, TRUE), TRUE),
-      array(array(FALSE, FALSE, FALSE), FALSE),
-    );
+    return [
+      [[TRUE], TRUE],
+      [[FALSE], FALSE],
+      [[TRUE, TRUE, TRUE], TRUE],
+      [[FALSE, FALSE, TRUE], TRUE],
+      [[FALSE, FALSE, FALSE], FALSE],
+    ];
   }
 
   /**
@@ -631,12 +631,12 @@ public function testGetTypeName() {
    * Tests ConfigNamesMapper::hasTranslation().
    */
   public function testGetOperations() {
-    $expected = array(
-      'translate' => array(
+    $expected = [
+      'translate' => [
         'title' => 'Translate',
         'url' => Url::fromRoute('config_translation.item.overview.system.site_information_settings'),
-      ),
-    );
+      ],
+    ];
     $result = $this->configNamesMapper->getOperations();
     $this->assertEquals($expected, $result);
   }
diff --git a/core/modules/contact/contact.module b/core/modules/contact/contact.module
index 4306e3beb8748e5b676a4fd3741e927f2f912984..65e7592cce4e71b424b023e4929a31acb8674789 100644
--- a/core/modules/contact/contact.module
+++ b/core/modules/contact/contact.module
@@ -21,17 +21,17 @@ function contact_help($route_name, RouteMatchInterface $route_match) {
       $contact_page = \Drupal::url('entity.contact_form.collection');
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Contact module allows visitors to contact registered users on your site, using the personal contact form, and also allows you to set up site-wide contact forms. For more information, see the <a href=":contact">online documentation for the Contact module</a>.', array(':contact' => 'https://www.drupal.org/documentation/modules/contact')) . '</p>';
+      $output .= '<p>' . t('The Contact module allows visitors to contact registered users on your site, using the personal contact form, and also allows you to set up site-wide contact forms. For more information, see the <a href=":contact">online documentation for the Contact module</a>.', [':contact' => 'https://www.drupal.org/documentation/modules/contact']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Using the personal contact form') . '</dt>';
       $output .= '<dd>' . t("Site visitors can email registered users on your site by using the personal contact form, without knowing or learning the email address of the recipient. When a site visitor is viewing a user profile, the viewer will see a <em>Contact</em> tab or link, which leads to the personal contact form. The personal contact link is not shown when you are viewing your own profile, and users must have both <em>View user information</em> (to see user profiles) and <em>Use users' personal contact forms</em> permission to see the link. The user whose profile is being viewed must also have their personal contact form enabled (this is a user account setting); viewers with <em>Administer users</em> permission can bypass this setting.") . '</dd>';
       $output .= '<dt>' . t('Configuring contact forms') . '</dt>';
-      $output .= '<dd>' . t('On the <a href=":contact_admin">Contact forms page</a>, you can configure the fields and display of the personal contact form, and you can set up one or more site-wide contact forms. Each site-wide contact form has a machine name, a label, and one or more defined recipients; when a site visitor submits the form, the field values are sent to those recipients.', array(':contact_admin' => $contact_page)) . '</dd>';
+      $output .= '<dd>' . t('On the <a href=":contact_admin">Contact forms page</a>, you can configure the fields and display of the personal contact form, and you can set up one or more site-wide contact forms. Each site-wide contact form has a machine name, a label, and one or more defined recipients; when a site visitor submits the form, the field values are sent to those recipients.', [':contact_admin' => $contact_page]) . '</dd>';
       $output .= '<dt>' . t('Linking to contact forms') . '</dt>';
-      $output .= '<dd>' . t('One site-wide contact form can be designated as the default contact form. If you choose to designate a default form, the <em>Contact</em> menu link in the <em>Footer</em> menu will link to it. You can modify this link from the <a href=":menu-settings">Menus page</a> if you have the Menu UI module installed. You can also create links to other contact forms; the URL for each form you have set up has format <em>contact/machine_name_of_form</em>.', array(':menu-settings' => $menu_page)) . '</p>';
+      $output .= '<dd>' . t('One site-wide contact form can be designated as the default contact form. If you choose to designate a default form, the <em>Contact</em> menu link in the <em>Footer</em> menu will link to it. You can modify this link from the <a href=":menu-settings">Menus page</a> if you have the Menu UI module installed. You can also create links to other contact forms; the URL for each form you have set up has format <em>contact/machine_name_of_form</em>.', [':menu-settings' => $menu_page]) . '</p>';
       $output .= '<dt>' . t('Adding content to contact forms') . '</dt>';
-      $output .= '<dd>' . t('From the <a href=":contact_admin">Contact forms page</a>, you can configure the fields to be shown on contact forms, including their labels and help text. If you would like other content (such as text or images) to appear on a contact form, use a block. You can create and edit blocks on the <a href=":blocks">Block layout page</a>, if the Block module is installed.', array(':blocks' => $block_page, ':contact_admin' => $contact_page)) . '</dd>';
+      $output .= '<dd>' . t('From the <a href=":contact_admin">Contact forms page</a>, you can configure the fields to be shown on contact forms, including their labels and help text. If you would like other content (such as text or images) to appear on a contact form, use a block. You can create and edit blocks on the <a href=":blocks">Block layout page</a>, if the Block module is installed.', [':blocks' => $block_page, ':contact_admin' => $contact_page]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -50,42 +50,42 @@ function contact_entity_type_alter(array &$entity_types) {
  * Implements hook_entity_extra_field_info().
  */
 function contact_entity_extra_field_info() {
-  $fields = array();
+  $fields = [];
   foreach (array_keys(\Drupal::service('entity_type.bundle.info')->getBundleInfo('contact_message')) as $bundle) {
-    $fields['contact_message'][$bundle]['form']['name'] = array(
+    $fields['contact_message'][$bundle]['form']['name'] = [
       'label' => t('Sender name'),
       'description' => t('Text'),
       'weight' => -50,
-    );
-    $fields['contact_message'][$bundle]['form']['mail'] = array(
+    ];
+    $fields['contact_message'][$bundle]['form']['mail'] = [
       'label' => t('Sender email'),
       'description' => t('Email'),
       'weight' => -40,
-    );
+    ];
     if ($bundle == 'personal') {
-      $fields['contact_message'][$bundle]['form']['recipient'] = array(
+      $fields['contact_message'][$bundle]['form']['recipient'] = [
         'label' => t('Recipient username'),
         'description' => t('User'),
         'weight' => -30,
-      );
+      ];
     }
-    $fields['contact_message'][$bundle]['form']['preview'] = array(
+    $fields['contact_message'][$bundle]['form']['preview'] = [
       'label' => t('Preview sender message'),
       'description' => t('Preview'),
       'weight' => 40,
-    );
-    $fields['contact_message'][$bundle]['form']['copy'] = array(
+    ];
+    $fields['contact_message'][$bundle]['form']['copy'] = [
       'label' => t('Send copy to sender'),
       'description' => t('Option'),
       'weight' => 50,
-    );
+    ];
   }
 
-  $fields['user']['user']['form']['contact'] = array(
+  $fields['user']['user']['form']['contact'] = [
     'label' => t('Contact settings'),
     'description' => t('Contact module form element.'),
     'weight' => 5,
-  );
+  ];
   return $fields;
 }
 
@@ -118,21 +118,21 @@ function contact_mail($key, &$message, $params) {
   $sender = $params['sender'];
   $language = \Drupal::languageManager()->getLanguage($message['langcode']);
 
-  $variables = array(
+  $variables = [
     '@site-name' => \Drupal::config('system.site')->get('name'),
     '@subject' => $contact_message->getSubject(),
     '@form' => !empty($params['contact_form']) ? $params['contact_form']->label() : NULL,
     '@form-url' => \Drupal::url('<current>', [], ['absolute' => TRUE, 'language' => $language]),
     '@sender-name' => $sender->getDisplayName(),
-  );
+  ];
   if ($sender->isAuthenticated()) {
-    $variables['@sender-url'] = $sender->url('canonical', array('absolute' => TRUE, 'language' => $language));
+    $variables['@sender-url'] = $sender->url('canonical', ['absolute' => TRUE, 'language' => $language]);
   }
   else {
     $variables['@sender-url'] = $params['sender']->getEmail();
   }
 
-  $options = array('langcode' => $language->getId());
+  $options = ['langcode' => $language->getId()];
 
   switch ($key) {
     case 'page_mail':
@@ -150,10 +150,10 @@ function contact_mail($key, &$message, $params) {
 
     case 'user_mail':
     case 'user_copy':
-      $variables += array(
+      $variables += [
         '@recipient-name' => $params['recipient']->getDisplayName(),
-        '@recipient-edit-url' => $params['recipient']->url('edit-form', array('absolute' => TRUE, 'language' => $language)),
-      );
+        '@recipient-edit-url' => $params['recipient']->url('edit-form', ['absolute' => TRUE, 'language' => $language]),
+      ];
       $message['subject'] .= t('[@site-name] @subject', $variables, $options);
       $message['body'][] = t('Hello @recipient-name,', $variables, $options);
       $message['body'][] = t("@sender-name (@sender-url) has sent you a message via your contact form at @site-name.", $variables, $options);
@@ -172,22 +172,22 @@ function contact_mail($key, &$message, $params) {
  * @see \Drupal\user\ProfileForm::form()
  */
 function contact_form_user_form_alter(&$form, FormStateInterface $form_state) {
-  $form['contact'] = array(
+  $form['contact'] = [
     '#type' => 'details',
     '#title' => t('Contact settings'),
     '#open' => TRUE,
     '#weight' => 5,
-  );
+  ];
   $account = $form_state->getFormObject()->getEntity();
   if (!\Drupal::currentUser()->isAnonymous() && $account->id()) {
     $account_data = \Drupal::service('user.data')->get('contact', $account->id(), 'enabled');
   }
-  $form['contact']['contact'] = array(
+  $form['contact']['contact'] = [
     '#type' => 'checkbox',
     '#title' => t('Personal contact form'),
     '#default_value' => isset($account_data) ? $account_data : \Drupal::config('contact.settings')->get('user_default_enabled'),
     '#description' => t('Allow other users to contact you via a personal contact form which keeps your email address hidden. Note that some privileged users such as site administrators are still able to contact you even if you choose to disable this feature.'),
-  );
+  ];
   $form['actions']['submit']['#submit'][] = 'contact_user_profile_form_submit';
 }
 
@@ -209,18 +209,18 @@ function contact_user_profile_form_submit($form, FormStateInterface $form_state)
  * @see \Drupal\user\AccountSettingsForm
  */
 function contact_form_user_admin_settings_alter(&$form, FormStateInterface $form_state) {
-  $form['contact'] = array(
+  $form['contact'] = [
     '#type' => 'details',
     '#title' => t('Contact settings'),
     '#open' => TRUE,
     '#weight' => 0,
-  );
-  $form['contact']['contact_default_status'] = array(
+  ];
+  $form['contact']['contact_default_status'] = [
     '#type' => 'checkbox',
     '#title' => t('Enable the personal contact form by default for new users'),
     '#description' => t('Changing this setting will not affect existing users.'),
     '#default_value' => \Drupal::configFactory()->getEditable('contact.settings')->get('user_default_enabled'),
-  );
+  ];
   // Add submit handler to save contact configuration.
   $form['#submit'][] = 'contact_form_user_admin_settings_submit';
 }
diff --git a/core/modules/contact/contact.views.inc b/core/modules/contact/contact.views.inc
index 15603624d34cd57c40778125f541ea942b0d148a..a18c9e796f32369c5e140847dbacfec4b5a940b2 100644
--- a/core/modules/contact/contact.views.inc
+++ b/core/modules/contact/contact.views.inc
@@ -9,11 +9,11 @@
  * Implements hook_views_data_alter().
  */
 function contact_views_data_alter(&$data) {
-  $data['users']['contact'] = array(
-    'field' => array(
+  $data['users']['contact'] = [
+    'field' => [
       'title' => t('Contact link'),
       'help' => t('Provide a simple link to the user contact page.'),
       'id' => 'contact_link',
-    ),
-  );
+    ],
+  ];
 }
diff --git a/core/modules/contact/src/ContactFormEditForm.php b/core/modules/contact/src/ContactFormEditForm.php
index 01ca02510862ea4a4b954c3694b1d377b7d6e7a8..aa94540bb98c89f4b39b8bb5c2cb7cb8e47ec935 100644
--- a/core/modules/contact/src/ContactFormEditForm.php
+++ b/core/modules/contact/src/ContactFormEditForm.php
@@ -72,60 +72,60 @@ public function form(array $form, FormStateInterface $form_state) {
     $contact_form = $this->entity;
     $default_form = $this->config('contact.settings')->get('default_form');
 
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label'),
       '#maxlength' => 255,
       '#default_value' => $contact_form->label(),
       '#description' => $this->t("Example: 'website feedback' or 'product information'."),
       '#required' => TRUE,
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
       '#default_value' => $contact_form->id(),
       '#maxlength' => EntityTypeInterface::BUNDLE_MAX_LENGTH,
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => '\Drupal\contact\Entity\ContactForm::load',
-      ),
+      ],
       '#disabled' => !$contact_form->isNew(),
-    );
-    $form['recipients'] = array(
+    ];
+    $form['recipients'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Recipients'),
       '#default_value' => implode(', ', $contact_form->getRecipients()),
       '#description' => $this->t("Example: 'webmaster@example.com' or 'sales@example.com,support@example.com' . To specify multiple recipients, separate each email address with a comma."),
       '#required' => TRUE,
-    );
-    $form['message'] = array(
+    ];
+    $form['message'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Message'),
       '#default_value' => $contact_form->getMessage(),
       '#description' => $this->t('The message to display to the user after submission of this form. Leave blank for no message.'),
-    );
-    $form['redirect'] = array(
+    ];
+    $form['redirect'] = [
       '#type' => 'path',
       '#title' => $this->t('Redirect path'),
       '#convert_path' => PathElement::CONVERT_NONE,
       '#default_value' => $contact_form->getRedirectPath(),
       '#description' => $this->t('Path to redirect the user to after submission of this form. For example, type "/about" to redirect to that page. Use a relative path with a slash in front.'),
-    );
-    $form['reply'] = array(
+    ];
+    $form['reply'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Auto-reply'),
       '#default_value' => $contact_form->getReply(),
       '#description' => $this->t('Optional auto-reply. Leave empty if you do not want to send the user an auto-reply message.'),
-    );
-    $form['weight'] = array(
+    ];
+    $form['weight'] = [
       '#type' => 'weight',
       '#title' => $this->t('Weight'),
       '#default_value' => $contact_form->getWeight(),
       '#description' => $this->t('When listing forms, those with lighter (smaller) weights get listed before forms with heavier (larger) weights. Forms with equal weights are sorted alphabetically.'),
-    );
-    $form['selected'] = array(
+    ];
+    $form['selected'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Make this the default form'),
       '#default_value' => $default_form === $contact_form->id(),
-    );
+    ];
 
     return $form;
   }
@@ -142,7 +142,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
     foreach ($recipients as &$recipient) {
       $recipient = trim($recipient);
       if (!$this->emailValidator->isValid($recipient)) {
-        $form_state->setErrorByName('recipients', $this->t('%recipient is an invalid email address.', array('%recipient' => $recipient)));
+        $form_state->setErrorByName('recipients', $this->t('%recipient is an invalid email address.', ['%recipient' => $recipient]));
       }
     }
     $form_state->setValue('recipients', $recipients);
@@ -165,12 +165,12 @@ public function save(array $form, FormStateInterface $form_state) {
     $edit_link = $this->entity->link($this->t('Edit'));
     $view_link = $contact_form->link($contact_form->label(), 'canonical');
     if ($status == SAVED_UPDATED) {
-      drupal_set_message($this->t('Contact form %label has been updated.', array('%label' => $view_link)));
-      $this->logger('contact')->notice('Contact form %label has been updated.', array('%label' => $contact_form->label(), 'link' => $edit_link));
+      drupal_set_message($this->t('Contact form %label has been updated.', ['%label' => $view_link]));
+      $this->logger('contact')->notice('Contact form %label has been updated.', ['%label' => $contact_form->label(), 'link' => $edit_link]);
     }
     else {
-      drupal_set_message($this->t('Contact form %label has been added.', array('%label' => $view_link)));
-      $this->logger('contact')->notice('Contact form %label has been added.', array('%label' => $contact_form->label(), 'link' => $edit_link));
+      drupal_set_message($this->t('Contact form %label has been added.', ['%label' => $view_link]));
+      $this->logger('contact')->notice('Contact form %label has been added.', ['%label' => $contact_form->label(), 'link' => $edit_link]);
     }
 
     // Update the default form.
diff --git a/core/modules/contact/src/Controller/ContactController.php b/core/modules/contact/src/Controller/ContactController.php
index 4d46f83d043bc8204026da3fc13604f0ca022c01..b8b69d5f19a5f93c42af0f9b77b32423054d7f9b 100644
--- a/core/modules/contact/src/Controller/ContactController.php
+++ b/core/modules/contact/src/Controller/ContactController.php
@@ -64,9 +64,9 @@ public function contactSitePage(ContactFormInterface $contact_form = NULL) {
       // If there are no forms, do not display the form.
       if (empty($contact_form)) {
         if ($this->currentUser()->hasPermission('administer contact forms')) {
-          drupal_set_message($this->t('The contact form has not been configured. <a href=":add">Add one or more forms</a> .', array(
-            ':add' => $this->url('contact.form_add'))), 'error');
-          return array();
+          drupal_set_message($this->t('The contact form has not been configured. <a href=":add">Add one or more forms</a> .', [
+            ':add' => $this->url('contact.form_add')]), 'error');
+          return [];
         }
         else {
           throw new NotFoundHttpException();
@@ -76,9 +76,9 @@ public function contactSitePage(ContactFormInterface $contact_form = NULL) {
 
     $message = $this->entityManager()
       ->getStorage('contact_message')
-      ->create(array(
+      ->create([
         'contact_form' => $contact_form->id(),
-      ));
+      ]);
 
     $form = $this->entityFormBuilder()->getForm($message);
     $form['#title'] = $contact_form->label();
@@ -106,13 +106,13 @@ public function contactPersonalPage(UserInterface $user) {
       throw new NotFoundHttpException();
     }
 
-    $message = $this->entityManager()->getStorage('contact_message')->create(array(
+    $message = $this->entityManager()->getStorage('contact_message')->create([
       'contact_form' => 'personal',
       'recipient' => $user->id(),
-    ));
+    ]);
 
     $form = $this->entityFormBuilder()->getForm($message);
-    $form['#title'] = $this->t('Contact @username', array('@username' => $user->getDisplayName()));
+    $form['#title'] = $this->t('Contact @username', ['@username' => $user->getDisplayName()]);
     $form['#cache']['contexts'][] = 'user.permissions';
     return $form;
   }
diff --git a/core/modules/contact/src/Entity/ContactForm.php b/core/modules/contact/src/Entity/ContactForm.php
index 9c63747065598f3084c4958aa02941b2c15cb7ac..00e5416bc81718a9b18190e97cadd9082a619e06 100644
--- a/core/modules/contact/src/Entity/ContactForm.php
+++ b/core/modules/contact/src/Entity/ContactForm.php
@@ -73,7 +73,7 @@ class ContactForm extends ConfigEntityBundleBase implements ContactFormInterface
    *
    * @var array
    */
-  protected $recipients = array();
+  protected $recipients = [];
 
   /**
    * The path to redirect to on form submission.
diff --git a/core/modules/contact/src/Entity/Message.php b/core/modules/contact/src/Entity/Message.php
index 20f360f6a4fbf1eecd1422004e9dd8bdd3c00853..d75496ba72d4e3a398ce8fd9e6b22e51d7bea611 100644
--- a/core/modules/contact/src/Entity/Message.php
+++ b/core/modules/contact/src/Entity/Message.php
@@ -153,29 +153,29 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('Subject'))
       ->setRequired(TRUE)
       ->setSetting('max_length', 100)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -10,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     // The text of the contact message.
     $fields['message'] = BaseFieldDefinition::create('string_long')
       ->setLabel(t('Message'))
       ->setRequired(TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textarea',
         'weight' => 0,
-        'settings' => array(
+        'settings' => [
           'rows' => 12,
-        ),
-      ))
+        ],
+      ])
       ->setDisplayConfigurable('form', TRUE)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'type' => 'string',
         'weight' => 0,
         'label' => 'above',
-      ))
+      ])
       ->setDisplayConfigurable('view', TRUE);
 
     $fields['copy'] = BaseFieldDefinition::create('boolean')
diff --git a/core/modules/contact/src/MailHandler.php b/core/modules/contact/src/MailHandler.php
index bb3b95e8d37dade145a24afaf54cf611ca0b4e6e..b57864c0596a4f19c419c081b8b15d0cf8d5f2d0 100644
--- a/core/modules/contact/src/MailHandler.php
+++ b/core/modules/contact/src/MailHandler.php
@@ -73,7 +73,7 @@ public function __construct(MailManagerInterface $mail_manager, LanguageManagerI
   public function sendMailMessages(MessageInterface $message, AccountInterface $sender) {
     // Clone the sender, as we make changes to mail and name properties.
     $sender_cloned = clone $this->userStorage->load($sender->id());
-    $params = array();
+    $params = [];
     $current_langcode = $this->languageManager->getCurrentLanguage()->getId();
     $recipient_langcode = $this->languageManager->getDefaultLanguage()->getId();
     $contact_form = $message->getContactForm();
@@ -86,7 +86,7 @@ public function sendMailMessages(MessageInterface $message, AccountInterface $se
 
       // For the email message, clarify that the sender name is not verified; it
       // could potentially clash with a username on this site.
-      $sender_cloned->name = $this->t('@name (not verified)', array('@name' => $message->getSenderName()));
+      $sender_cloned->name = $this->t('@name (not verified)', ['@name' => $message->getSenderName()]);
     }
 
     // Build email parameters.
@@ -133,18 +133,18 @@ public function sendMailMessages(MessageInterface $message, AccountInterface $se
     }
 
     if (!$message->isPersonal()) {
-      $this->logger->notice('%sender-name (@sender-from) sent an email regarding %contact_form.', array(
+      $this->logger->notice('%sender-name (@sender-from) sent an email regarding %contact_form.', [
         '%sender-name' => $sender_cloned->getUsername(),
         '@sender-from' => $sender_cloned->getEmail(),
         '%contact_form' => $contact_form->label(),
-      ));
+      ]);
     }
     else {
-      $this->logger->notice('%sender-name (@sender-from) sent %recipient-name an email.', array(
+      $this->logger->notice('%sender-name (@sender-from) sent %recipient-name an email.', [
         '%sender-name' => $sender_cloned->getUsername(),
         '@sender-from' => $sender_cloned->getEmail(),
         '%recipient-name' => $message->getPersonalRecipient()->getUsername(),
-      ));
+      ]);
     }
   }
 
diff --git a/core/modules/contact/src/MessageForm.php b/core/modules/contact/src/MessageForm.php
index da221ff8352c1ffeac526edd4d25aac29a499a28..16d41b5acc482b77060d91745eecaa91d693deb8 100644
--- a/core/modules/contact/src/MessageForm.php
+++ b/core/modules/contact/src/MessageForm.php
@@ -103,24 +103,24 @@ public function form(array $form, FormStateInterface $form_state) {
     $form['#attributes']['class'][] = 'contact-form';
 
     if (!empty($message->preview)) {
-      $form['preview'] = array(
-        '#theme_wrappers' => array('container__preview'),
-        '#attributes' => array('class' => array('preview')),
-      );
+      $form['preview'] = [
+        '#theme_wrappers' => ['container__preview'],
+        '#attributes' => ['class' => ['preview']],
+      ];
       $form['preview']['message'] = $this->entityManager->getViewBuilder('contact_message')->view($message, 'full');
     }
 
-    $form['name'] = array(
+    $form['name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Your name'),
       '#maxlength' => 255,
       '#required' => TRUE,
-    );
-    $form['mail'] = array(
+    ];
+    $form['mail'] = [
       '#type' => 'email',
       '#title' => $this->t('Your email address'),
       '#required' => TRUE,
-    );
+    ];
     if ($user->isAnonymous()) {
       $form['#attached']['library'][] = 'core/drupal.form';
       $form['#attributes']['data-user-info-from-browser'] = TRUE;
@@ -141,24 +141,24 @@ public function form(array $form, FormStateInterface $form_state) {
 
     // The user contact form has a preset recipient.
     if ($message->isPersonal()) {
-      $form['recipient'] = array(
+      $form['recipient'] = [
         '#type' => 'item',
         '#title' => $this->t('To'),
         '#value' => $message->getPersonalRecipient()->id(),
-        'name' => array(
+        'name' => [
           '#theme' => 'username',
           '#account' => $message->getPersonalRecipient(),
-        ),
-      );
+        ],
+      ];
     }
 
-    $form['copy'] = array(
+    $form['copy'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Send yourself a copy'),
       // Do not allow anonymous users to send themselves a copy, because it can
       // be abused to spam people.
       '#access' => $user->isAuthenticated(),
-    );
+    ];
     return $form;
   }
 
@@ -168,11 +168,11 @@ public function form(array $form, FormStateInterface $form_state) {
   public function actions(array $form, FormStateInterface $form_state) {
     $elements = parent::actions($form, $form_state);
     $elements['submit']['#value'] = $this->t('Send message');
-    $elements['preview'] = array(
+    $elements['preview'] = [
       '#type' => 'submit',
       '#value' => $this->t('Preview'),
-      '#submit' => array('::submitForm', '::preview'),
-    );
+      '#submit' => ['::submitForm', '::preview'],
+    ];
     return $elements;
   }
 
@@ -197,10 +197,10 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
       $interval = $this->config('contact.settings')->get('flood.interval');
 
       if (!$this->flood->isAllowed('contact', $limit, $interval)) {
-        $form_state->setErrorByName('', $this->t('You cannot send more than %limit messages in @interval. Try again later.', array(
+        $form_state->setErrorByName('', $this->t('You cannot send more than %limit messages in @interval. Try again later.', [
           '%limit' => $limit,
           '@interval' => $this->dateFormatter->formatInterval($interval),
-        )));
+        ]));
       }
     }
 
diff --git a/core/modules/contact/src/MessageViewBuilder.php b/core/modules/contact/src/MessageViewBuilder.php
index 3024f6291261fb67582837851464d6f9b18d114e..6cbf0e738e4b2ece1a32b7fe68c929ec77b0aa6f 100644
--- a/core/modules/contact/src/MessageViewBuilder.php
+++ b/core/modules/contact/src/MessageViewBuilder.php
@@ -33,11 +33,11 @@ public function buildComponents(array &$build, array $entities, array $displays,
       // Add the message extra field, if enabled.
       $display = $displays[$entity->bundle()];
       if ($entity->getMessage() && $display->getComponent('message')) {
-        $build[$id]['message'] = array(
+        $build[$id]['message'] = [
           '#type' => 'item',
           '#title' => t('Message'),
           '#plain_text' => $entity->getMessage(),
-        );
+        ];
       }
     }
   }
@@ -54,7 +54,7 @@ public function view(EntityInterface $entity, $view_mode = 'full', $langcode = N
       // convert DIVs correctly.
       foreach (Element::children($build) as $key) {
         if (isset($build[$key]['#label_display']) && $build[$key]['#label_display'] == 'above') {
-          $build[$key] += array('#prefix' => '');
+          $build[$key] += ['#prefix' => ''];
           $build[$key]['#prefix'] = $build[$key]['#title'] . ":\n";
           $build[$key]['#label_display'] = 'hidden';
         }
diff --git a/core/modules/contact/src/Plugin/migrate/source/ContactCategory.php b/core/modules/contact/src/Plugin/migrate/source/ContactCategory.php
index 2975431ad5d3c62332ea85089757f325d795ce2a..0b9f7b3b837fd6adc6a740829e12897baa975118 100644
--- a/core/modules/contact/src/Plugin/migrate/source/ContactCategory.php
+++ b/core/modules/contact/src/Plugin/migrate/source/ContactCategory.php
@@ -20,14 +20,14 @@ class ContactCategory extends DrupalSqlBase {
    */
   public function query() {
     $query = $this->select('contact', 'c')
-      ->fields('c', array(
+      ->fields('c', [
         'cid',
         'category',
         'recipients',
         'reply',
         'weight',
         'selected',
-      )
+      ]
     );
     $query->orderBy('c.cid');
     return $query;
@@ -45,14 +45,14 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'cid' => $this->t('Primary Key: Unique category ID.'),
       'category' => $this->t('Category name.'),
       'recipients' => $this->t('Comma-separated list of recipient email addresses.'),
       'reply' => $this->t('Text of the auto-reply message.'),
       'weight' => $this->t("The category's weight."),
       'selected' => $this->t('Flag to indicate whether or not category is selected by default. (1 = Yes, 0 = No)'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/contact/src/Plugin/views/field/ContactLink.php b/core/modules/contact/src/Plugin/views/field/ContactLink.php
index ecc4cea9fa40abbef5b1d079494c11091b33a3ab..a98be137ddda4ff74ad3da74d6383744a41e6fe2 100644
--- a/core/modules/contact/src/Plugin/views/field/ContactLink.php
+++ b/core/modules/contact/src/Plugin/views/field/ContactLink.php
@@ -42,8 +42,8 @@ protected function renderLink(ResultRow $row) {
     $this->options['alter']['make_link'] = TRUE;
     $this->options['alter']['url'] = $this->getUrlInfo($row);
 
-    $title = $this->t('Contact %user', array('%user' => $entity->label()));
-    $this->options['alter']['attributes'] = array('title' => $title);
+    $title = $this->t('Contact %user', ['%user' => $entity->label()]);
+    $this->options['alter']['attributes'] = ['title' => $title];
 
     if (!empty($this->options['text'])) {
       return $this->options['text'];
diff --git a/core/modules/contact/src/Tests/ContactPersonalTest.php b/core/modules/contact/src/Tests/ContactPersonalTest.php
index 936aed5892cad2a7043f59555ef6a41a73f82a9e..d80484f4298b7dbe29471c3e3bfee3e079de8bab 100644
--- a/core/modules/contact/src/Tests/ContactPersonalTest.php
+++ b/core/modules/contact/src/Tests/ContactPersonalTest.php
@@ -20,7 +20,7 @@ class ContactPersonalTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('contact', 'dblog');
+  public static $modules = ['contact', 'dblog'];
 
   /**
    * A user with some administrative permissions.
@@ -47,11 +47,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create an admin user.
-    $this->adminUser = $this->drupalCreateUser(array('administer contact forms', 'administer users', 'administer account settings', 'access site reports'));
+    $this->adminUser = $this->drupalCreateUser(['administer contact forms', 'administer users', 'administer account settings', 'access site reports']);
 
     // Create some normal users with their contact forms enabled by default.
     $this->config('contact.settings')->set('user_default_enabled', TRUE)->save();
-    $this->webUser = $this->drupalCreateUser(array('access user profiles', 'access user contact forms'));
+    $this->webUser = $this->drupalCreateUser(['access user profiles', 'access user contact forms']);
     $this->contactUser = $this->drupalCreateUser();
   }
 
@@ -74,11 +74,11 @@ function testSendPersonalContactMessage() {
     $this->assertEqual($mail['from'], $this->config('system.site')->get('mail'));
     $this->assertEqual($mail['reply-to'], $this->webUser->getEmail());
     $this->assertEqual($mail['key'], 'user_mail');
-    $variables = array(
+    $variables = [
       '@site-name' => $this->config('system.site')->get('name'),
       '@subject' => $message['subject[0][value]'],
       '@recipient-name' => $this->contactUser->getDisplayName(),
-    );
+    ];
     $subject = PlainTextOutput::renderFromHtml(t('[@site-name] @subject', $variables));
     $this->assertEqual($mail['subject'], $subject, 'Subject is in sent message.');
     $this->assertTrue(strpos($mail['body'], 'Hello ' . $variables['@recipient-name']) !== FALSE, 'Recipient name is in sent message.');
@@ -90,11 +90,11 @@ function testSendPersonalContactMessage() {
     $this->drupalLogin($this->adminUser);
     // Verify that the correct watchdog message has been logged.
     $this->drupalGet('/admin/reports/dblog');
-    $placeholders = array(
+    $placeholders = [
       '@sender_name' => $this->webUser->username,
       '@sender_email' => $this->webUser->getEmail(),
       '@recipient_name' => $this->contactUser->getUsername()
-    );
+    ];
     $this->assertRaw(SafeMarkup::format('@sender_name (@sender_email) sent @recipient_name an email.', $placeholders));
     // Ensure an unescaped version of the email does not exist anywhere.
     $this->assertNoRaw($this->webUser->getEmail());
@@ -109,7 +109,7 @@ function testPersonalContactAccess() {
     $this->drupalGet('user/' . $this->adminUser->id() . '/contact');
     $this->assertResponse(200);
     // Check the page title is properly displayed.
-    $this->assertRaw(t('Contact @username', array('@username' => $this->adminUser->getDisplayName())));
+    $this->assertRaw(t('Contact @username', ['@username' => $this->adminUser->getDisplayName()]));
 
     // Test denied access to admin user's own contact form.
     $this->drupalLogout();
@@ -149,7 +149,7 @@ function testPersonalContactAccess() {
 
     // Test that anonymous users can access the contact form.
     $this->drupalLogout();
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access user contact forms'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access user contact forms']);
     $this->drupalGet('user/' . $this->contactUser->id() . '/contact');
     $this->assertResponse(200);
 
@@ -159,7 +159,7 @@ function testPersonalContactAccess() {
     $this->assertCacheContext('user');
 
     // Revoke the personal contact permission for the anonymous user.
-    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, array('access user contact forms'));
+    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, ['access user contact forms']);
     $this->drupalGet('user/' . $this->contactUser->id() . '/contact');
     $this->assertResponse(403);
     $this->assertCacheContext('user');
@@ -168,7 +168,7 @@ function testPersonalContactAccess() {
 
     // Disable the personal contact form.
     $this->drupalLogin($this->adminUser);
-    $edit = array('contact_default_status' => FALSE);
+    $edit = ['contact_default_status' => FALSE];
     $this->drupalPostForm('admin/config/people/accounts', $edit, t('Save configuration'));
     $this->assertText(t('The configuration options have been saved.'), 'Setting successfully saved.');
     $this->drupalLogout();
@@ -206,7 +206,7 @@ function testPersonalContactAccess() {
     $this->drupalGet('user/' . $this->webUser->id() . '/edit');
     $this->assertNoFieldChecked('edit-contact--2');
     $this->assertFalse(\Drupal::service('user.data')->get('contact', $this->webUser->id(), 'enabled'), 'Personal contact form disabled');
-    $this->drupalPostForm(NULL, array('contact' => TRUE), t('Save'));
+    $this->drupalPostForm(NULL, ['contact' => TRUE], t('Save'));
     $this->assertFieldChecked('edit-contact--2');
     $this->assertTrue(\Drupal::service('user.data')->get('contact', $this->webUser->id(), 'enabled'), 'Personal contact form enabled');
 
@@ -237,7 +237,7 @@ function testPersonalContactFlood() {
 
     // Submit contact form one over limit.
     $this->submitPersonalContact($this->contactUser);
-    $this->assertRaw(t('You cannot send more than %number messages in @interval. Try again later.', array('%number' => $flood_limit, '@interval' => \Drupal::service('date.formatter')->formatInterval($this->config('contact.settings')->get('flood.interval')))), 'Normal user denied access to flooded contact form.');
+    $this->assertRaw(t('You cannot send more than %number messages in @interval. Try again later.', ['%number' => $flood_limit, '@interval' => \Drupal::service('date.formatter')->formatInterval($this->config('contact.settings')->get('flood.interval'))]), 'Normal user denied access to flooded contact form.');
 
     // Test that the admin user can still access the contact form even though
     // the flood limit was reached.
@@ -249,7 +249,7 @@ function testPersonalContactFlood() {
    * Tests the personal contact form based access when an admin adds users.
    */
   function testAdminContact() {
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access user contact forms'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access user contact forms']);
     $this->checkContactAccess(200);
     $this->checkContactAccess(403, FALSE);
     $config = $this->config('contact.settings');
@@ -276,13 +276,13 @@ protected function checkContactAccess($response, $contact_value = NULL) {
       $this->assertNoFieldChecked('edit-contact--2');
     }
     $name = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'name' => $name,
       'mail' => $this->randomMachineName() . '@example.com',
       'pass[pass1]' => $pass = $this->randomString(),
       'pass[pass2]' => $pass,
       'notify' => FALSE,
-    );
+    ];
     if (isset($contact_value)) {
       $edit['contact'] = $contact_value;
     }
@@ -306,11 +306,11 @@ protected function checkContactAccess($response, $contact_value = NULL) {
    * @return array
    *   An array with the form fields being used.
    */
-  protected function submitPersonalContact(AccountInterface $account, array $message = array()) {
-    $message += array(
+  protected function submitPersonalContact(AccountInterface $account, array $message = []) {
+    $message += [
       'subject[0][value]' => $this->randomMachineName(16),
       'message[0][value]' => $this->randomMachineName(64),
-    );
+    ];
     $this->drupalPostForm('user/' . $account->id() . '/contact', $message, t('Send message'));
     return $message;
   }
diff --git a/core/modules/contact/src/Tests/ContactSitewideTest.php b/core/modules/contact/src/Tests/ContactSitewideTest.php
index ffc2e9091c99227a994e6ad3b42ec06ce2e61710..0721cf4dc9d8c78804a393c511a78ccade9f6d54 100644
--- a/core/modules/contact/src/Tests/ContactSitewideTest.php
+++ b/core/modules/contact/src/Tests/ContactSitewideTest.php
@@ -65,7 +65,7 @@ function testSiteWideContact() {
       ->save();
 
     // Set settings.
-    $edit = array();
+    $edit = [];
     $edit['contact_default_status'] = TRUE;
     $this->drupalPostForm('admin/config/people/accounts', $edit, t('Save configuration'));
     $this->assertText(t('The configuration options have been saved.'));
@@ -77,11 +77,11 @@ function testSiteWideContact() {
     // Cannot use ::assertNoLinkByHref as it does partial url matching and with
     // field_ui enabled admin/structure/contact/manage/personal/fields exists.
     // @todo: See https://www.drupal.org/node/2031223 for the above.
-    $edit_link = $this->xpath('//a[@href=:href]', array(
-      ':href' => \Drupal::url('entity.contact_form.edit_form', array('contact_form' => 'personal'))
-    ));
+    $edit_link = $this->xpath('//a[@href=:href]', [
+      ':href' => \Drupal::url('entity.contact_form.edit_form', ['contact_form' => 'personal'])
+    ]);
     $this->assertTrue(empty($edit_link), format_string('No link containing href %href found.',
-      array('%href' => 'admin/structure/contact/manage/personal')
+      ['%href' => 'admin/structure/contact/manage/personal']
     ));
     $this->assertNoLinkByHref('admin/structure/contact/manage/personal/delete');
 
@@ -95,7 +95,7 @@ function testSiteWideContact() {
     $this->assertNoLinkByHref('admin/structure/contact/manage/feedback');
 
     // Ensure that the contact form won't be shown without forms.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access site-wide contact form'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access site-wide contact form']);
     $this->drupalLogout();
     $this->drupalGet('contact');
     $this->assertResponse(404);
@@ -110,10 +110,10 @@ function testSiteWideContact() {
 
     // Add forms.
     // Test invalid recipients.
-    $invalid_recipients = array('invalid', 'invalid@', 'invalid@site.', '@site.', '@site.com');
+    $invalid_recipients = ['invalid', 'invalid@', 'invalid@site.', '@site.', '@site.com'];
     foreach ($invalid_recipients as $invalid_recipient) {
       $this->addContactForm($this->randomMachineName(16), $this->randomMachineName(16), $invalid_recipient, '', FALSE);
-      $this->assertRaw(t('%recipient is an invalid email address.', array('%recipient' => $invalid_recipient)));
+      $this->assertRaw(t('%recipient is an invalid email address.', ['%recipient' => $invalid_recipient]));
     }
 
     // Test validation of empty form and recipients fields.
@@ -123,24 +123,24 @@ function testSiteWideContact() {
     $this->assertText(t('Recipients field is required.'));
 
     // Test validation of max_length machine name.
-    $recipients = array('simpletest&@example.com', 'simpletest2@example.com', 'simpletest3@example.com');
+    $recipients = ['simpletest&@example.com', 'simpletest2@example.com', 'simpletest3@example.com'];
     $max_length = EntityTypeInterface::BUNDLE_MAX_LENGTH;
     $max_length_exceeded = $max_length + 1;
-    $this->addContactForm($id = Unicode::strtolower($this->randomMachineName($max_length_exceeded)), $label = $this->randomMachineName($max_length_exceeded), implode(',', array($recipients[0])), '', TRUE);
-    $this->assertText(format_string('Machine-readable name cannot be longer than @max characters but is currently @exceeded characters long.', array('@max' => $max_length, '@exceeded' => $max_length_exceeded)));
-    $this->addContactForm($id = Unicode::strtolower($this->randomMachineName($max_length)), $label = $this->randomMachineName($max_length), implode(',', array($recipients[0])), '', TRUE);
-    $this->assertText(t('Contact form @label has been added.', array('@label' => $label)));
+    $this->addContactForm($id = Unicode::strtolower($this->randomMachineName($max_length_exceeded)), $label = $this->randomMachineName($max_length_exceeded), implode(',', [$recipients[0]]), '', TRUE);
+    $this->assertText(format_string('Machine-readable name cannot be longer than @max characters but is currently @exceeded characters long.', ['@max' => $max_length, '@exceeded' => $max_length_exceeded]));
+    $this->addContactForm($id = Unicode::strtolower($this->randomMachineName($max_length)), $label = $this->randomMachineName($max_length), implode(',', [$recipients[0]]), '', TRUE);
+    $this->assertText(t('Contact form @label has been added.', ['@label' => $label]));
 
     // Verify that the creation message contains a link to a contact form.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'contact/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'contact/']);
     $this->assert(isset($view_link), 'The message area contains a link to a contact form.');
 
     // Create first valid form.
-    $this->addContactForm($id = Unicode::strtolower($this->randomMachineName(16)), $label = $this->randomMachineName(16), implode(',', array($recipients[0])), '', TRUE);
-    $this->assertText(t('Contact form @label has been added.', array('@label' => $label)));
+    $this->addContactForm($id = Unicode::strtolower($this->randomMachineName(16)), $label = $this->randomMachineName(16), implode(',', [$recipients[0]]), '', TRUE);
+    $this->assertText(t('Contact form @label has been added.', ['@label' => $label]));
 
     // Verify that the creation message contains a link to a contact form.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'contact/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'contact/']);
     $this->assert(isset($view_link), 'The message area contains a link to a contact form.');
 
     // Check that the form was created in site default language.
@@ -156,13 +156,13 @@ function testSiteWideContact() {
     $this->assertEscaped($recipients[0]);
 
     // Test update contact form.
-    $this->updateContactForm($id, $label = $this->randomMachineName(16), $recipients_str = implode(',', array($recipients[0], $recipients[1])), $reply = $this->randomMachineName(30), FALSE, 'Your message has been sent.', '/user');
+    $this->updateContactForm($id, $label = $this->randomMachineName(16), $recipients_str = implode(',', [$recipients[0], $recipients[1]]), $reply = $this->randomMachineName(30), FALSE, 'Your message has been sent.', '/user');
     $config = $this->config('contact.form.' . $id)->get();
     $this->assertEqual($config['label'], $label);
-    $this->assertEqual($config['recipients'], array($recipients[0], $recipients[1]));
+    $this->assertEqual($config['recipients'], [$recipients[0], $recipients[1]]);
     $this->assertEqual($config['reply'], $reply);
     $this->assertNotEqual($id, $this->config('contact.settings')->get('default_form'));
-    $this->assertText(t('Contact form @label has been updated.', array('@label' => $label)));
+    $this->assertText(t('Contact form @label has been updated.', ['@label' => $label]));
     // Ensure the label is displayed on the contact page for this form.
     $this->drupalGet('contact/' . $id);
     $this->assertText($label);
@@ -171,7 +171,7 @@ function testSiteWideContact() {
     $this->config('contact.settings')->set('default_form', $id)->save();
 
     // Ensure that the contact form is shown without a form selection input.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access site-wide contact form'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access site-wide contact form']);
     $this->drupalLogout();
     $this->drupalGet('contact');
     $this->assertText(t('Your email address'));
@@ -179,26 +179,26 @@ function testSiteWideContact() {
     $this->drupalLogin($admin_user);
 
     // Add more forms.
-    $this->addContactForm(Unicode::strtolower($this->randomMachineName(16)), $label = $this->randomMachineName(16), implode(',', array($recipients[0], $recipients[1])), '', FALSE);
-    $this->assertText(t('Contact form @label has been added.', array('@label' => $label)));
+    $this->addContactForm(Unicode::strtolower($this->randomMachineName(16)), $label = $this->randomMachineName(16), implode(',', [$recipients[0], $recipients[1]]), '', FALSE);
+    $this->assertText(t('Contact form @label has been added.', ['@label' => $label]));
 
-    $this->addContactForm($name = Unicode::strtolower($this->randomMachineName(16)), $label = $this->randomMachineName(16), implode(',', array($recipients[0], $recipients[1], $recipients[2])), '', FALSE);
-    $this->assertText(t('Contact form @label has been added.', array('@label' => $label)));
+    $this->addContactForm($name = Unicode::strtolower($this->randomMachineName(16)), $label = $this->randomMachineName(16), implode(',', [$recipients[0], $recipients[1], $recipients[2]]), '', FALSE);
+    $this->assertText(t('Contact form @label has been added.', ['@label' => $label]));
 
     // Try adding a form that already exists.
     $this->addContactForm($name, $label, '', '', FALSE);
-    $this->assertNoText(t('Contact form @label has been added.', array('@label' => $label)));
+    $this->assertNoText(t('Contact form @label has been added.', ['@label' => $label]));
     $this->assertRaw(t('The machine-readable name is already in use. It must be unique.'));
 
     $this->drupalLogout();
 
     // Check to see that anonymous user cannot see contact page without permission.
-    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, array('access site-wide contact form'));
+    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, ['access site-wide contact form']);
     $this->drupalGet('contact');
     $this->assertResponse(403);
 
     // Give anonymous user permission and see that page is viewable.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access site-wide contact form'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access site-wide contact form']);
     $this->drupalGet('contact');
     $this->assertResponse(200);
 
@@ -210,7 +210,7 @@ function testSiteWideContact() {
     $this->assertText(t('Your email address field is required.'));
 
     $this->submitContact($this->randomMachineName(16), $invalid_recipients[0], $this->randomMachineName(16), $id, $this->randomMachineName(64));
-    $this->assertRaw(t('The email address %mail is not valid.', array('%mail' => 'invalid')));
+    $this->assertRaw(t('The email address %mail is not valid.', ['%mail' => 'invalid']));
 
     $this->submitContact($this->randomMachineName(16), $recipients[0], '', $id, $this->randomMachineName(64));
     $this->assertText(t('Subject field is required.'));
@@ -238,7 +238,7 @@ function testSiteWideContact() {
     }
     // Submit contact form one over limit.
     $this->submitContact($this->randomMachineName(16), $recipients[0], $this->randomMachineName(16), $id, $this->randomMachineName(64));
-    $this->assertRaw(t('You cannot send more than %number messages in 10 min. Try again later.', array('%number' => $this->config('contact.settings')->get('flood.limit'))));
+    $this->assertRaw(t('You cannot send more than %number messages in 10 min. Try again later.', ['%number' => $this->config('contact.settings')->get('flood.limit')]));
 
     // Test listing controller.
     $this->drupalLogin($admin_user);
@@ -246,7 +246,7 @@ function testSiteWideContact() {
     $this->deleteContactForms();
 
     $label = $this->randomMachineName(16);
-    $recipients = implode(',', array($recipients[0], $recipients[1], $recipients[2]));
+    $recipients = implode(',', [$recipients[0], $recipients[1], $recipients[2]]);
     $contact_form = Unicode::strtolower($this->randomMachineName(16));
     $this->addContactForm($contact_form, $label, $recipients, '', FALSE);
     $this->drupalGet('admin/structure/contact');
@@ -293,15 +293,15 @@ function testSiteWideContact() {
     $this->assertText($field_label);
 
     // Submit the contact form and verify the content.
-    $edit = array(
+    $edit = [
       'subject[0][value]' => $this->randomMachineName(),
       'message[0][value]' => $this->randomMachineName(),
       $field_name . '[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Send message'));
     $mails = $this->drupalGetMails();
     $mail = array_pop($mails);
-    $this->assertEqual($mail['subject'], t('[@label] @subject', array('@label' => $label, '@subject' => $edit['subject[0][value]'])));
+    $this->assertEqual($mail['subject'], t('[@label] @subject', ['@label' => $label, '@subject' => $edit['subject[0][value]']]));
     $this->assertTrue(strpos($mail['body'], $field_label));
     $this->assertTrue(strpos($mail['body'], $edit[$field_name . '[0][value]']));
 
@@ -315,11 +315,11 @@ function testSiteWideContact() {
     $this->drupalGet('contact/' . $contact_form);
 
     // Submit the contact form and verify the content.
-    $edit = array(
+    $edit = [
       'subject[0][value]' => $this->randomMachineName(),
       'message[0][value]' => $this->randomMachineName(),
       $field_name . '[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Send message'));
     $this->assertText('Thanks for your submission.');
     $this->assertUrl('user/' . $admin_user->id());
@@ -335,13 +335,13 @@ function testSiteWideContact() {
     $this->drupalGet('contact/' . $contact_form);
 
     // Submit the contact form and verify the content.
-    $edit = array(
+    $edit = [
       'subject[0][value]' => $this->randomMachineName(),
       'message[0][value]' => $this->randomMachineName(),
       $field_name . '[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Send message'));
-    $result = $this->xpath('//div[@role=:role]', array(':role' => 'contentinfo'));
+    $result = $this->xpath('//div[@role=:role]', [':role' => 'contentinfo']);
     $this->assertEqual(count($result), 0, 'Messages not found.');
     $this->assertUrl('user/' . $admin_user->id());
   }
@@ -369,7 +369,7 @@ function testAutoReply() {
 
     // Log the current user out in order to test the name and email fields.
     $this->drupalLogout();
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access site-wide contact form'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access site-wide contact form']);
 
     // Test the auto-reply for form 'foo'.
     $email = $this->randomMachineName(32) . '@example.com';
@@ -377,7 +377,7 @@ function testAutoReply() {
     $this->submitContact($this->randomMachineName(16), $email, $subject, 'foo', $this->randomString(128));
 
     // We are testing the auto-reply, so there should be one email going to the sender.
-    $captured_emails = $this->drupalGetMails(array('id' => 'contact_page_autoreply', 'to' => $email));
+    $captured_emails = $this->drupalGetMails(['id' => 'contact_page_autoreply', 'to' => $email]);
     $this->assertEqual(count($captured_emails), 1);
     $this->assertEqual(trim($captured_emails[0]['body']), trim(MailFormatHelper::htmlToText($foo_autoreply)));
 
@@ -386,14 +386,14 @@ function testAutoReply() {
     $this->submitContact($this->randomMachineName(16), $email, $this->randomString(64), 'bar', $this->randomString(128));
 
     // Auto-reply for form 'bar' should result in one auto-reply email to the sender.
-    $captured_emails = $this->drupalGetMails(array('id' => 'contact_page_autoreply', 'to' => $email));
+    $captured_emails = $this->drupalGetMails(['id' => 'contact_page_autoreply', 'to' => $email]);
     $this->assertEqual(count($captured_emails), 1);
     $this->assertEqual(trim($captured_emails[0]['body']), trim(MailFormatHelper::htmlToText($bar_autoreply)));
 
     // Verify that no auto-reply is sent when the auto-reply field is left blank.
     $email = $this->randomMachineName(32) . '@example.com';
     $this->submitContact($this->randomMachineName(16), $email, $this->randomString(64), 'no_autoreply', $this->randomString(128));
-    $captured_emails = $this->drupalGetMails(array('id' => 'contact_page_autoreply', 'to' => $email));
+    $captured_emails = $this->drupalGetMails(['id' => 'contact_page_autoreply', 'to' => $email]);
     $this->assertEqual(count($captured_emails), 0);
 
     // Verify that the current error message doesn't show, that the auto-reply
@@ -432,7 +432,7 @@ function testAutoReply() {
    *   Array of third party settings to be added to the posted form data.
    */
   function addContactForm($id, $label, $recipients, $reply, $selected, $message = 'Your message has been sent.', $third_party_settings = []) {
-    $edit = array();
+    $edit = [];
     $edit['label'] = $label;
     $edit['id'] = $id;
     $edit['message'] = $message;
@@ -464,7 +464,7 @@ function addContactForm($id, $label, $recipients, $reply, $selected, $message =
    *   The path where user will be redirect after this form has been submitted..
    */
   function updateContactForm($id, $label, $recipients, $reply, $selected, $message = 'Your message has been sent.', $redirect = '/') {
-    $edit = array();
+    $edit = [];
     $edit['label'] = $label;
     $edit['recipients'] = $recipients;
     $edit['reply'] = $reply;
@@ -489,7 +489,7 @@ function updateContactForm($id, $label, $recipients, $reply, $selected, $message
    *   The message body.
    */
   function submitContact($name, $mail, $subject, $id, $message) {
-    $edit = array();
+    $edit = [];
     $edit['name'] = $name;
     $edit['mail'] = $mail;
     $edit['subject[0][value]'] = $subject;
@@ -514,9 +514,9 @@ function deleteContactForms() {
         $this->assertResponse(403);
       }
       else {
-        $this->drupalPostForm("admin/structure/contact/manage/$id/delete", array(), t('Delete'));
-        $this->assertRaw(t('The contact form %label has been deleted.', array('%label' => $contact_form->label())));
-        $this->assertFalse(ContactForm::load($id), format_string('Form %contact_form not found', array('%contact_form' => $contact_form->label())));
+        $this->drupalPostForm("admin/structure/contact/manage/$id/delete", [], t('Delete'));
+        $this->assertRaw(t('The contact form %label has been deleted.', ['%label' => $contact_form->label()]));
+        $this->assertFalse(ContactForm::load($id), format_string('Form %contact_form not found', ['%contact_form' => $contact_form->label()]));
       }
     }
   }
diff --git a/core/modules/contact/src/Tests/ContactStorageTest.php b/core/modules/contact/src/Tests/ContactStorageTest.php
index ad0e8d46c534c508830fb61d26fd2249430c0627..f9165a8534fd7dce3244cbb320b975ae65eb7f48 100644
--- a/core/modules/contact/src/Tests/ContactStorageTest.php
+++ b/core/modules/contact/src/Tests/ContactStorageTest.php
@@ -37,23 +37,23 @@ class ContactStorageTest extends ContactSitewideTest {
    */
   public function testContactStorage() {
     // Create and log in administrative user.
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'access site-wide contact form',
       'administer contact forms',
       'administer users',
       'administer account settings',
       'administer contact_message fields',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
     // Create first valid contact form.
     $mail = 'simpletest@example.com';
-    $this->addContactForm($id = Unicode::strtolower($this->randomMachineName(16)), $label = $this->randomMachineName(16), implode(',', array($mail)), '', TRUE, 'Your message has been sent.', [
+    $this->addContactForm($id = Unicode::strtolower($this->randomMachineName(16)), $label = $this->randomMachineName(16), implode(',', [$mail]), '', TRUE, 'Your message has been sent.', [
       'send_a_pony' => 1,
     ]);
-    $this->assertText(t('Contact form @label has been added.', array('@label' => $label)));
+    $this->assertText(t('Contact form @label has been added.', ['@label' => $label]));
 
     // Ensure that anonymous can submit site-wide contact form.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access site-wide contact form'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access site-wide contact form']);
     $this->drupalLogout();
     $this->drupalGet('contact');
     $this->assertText(t('Your email address'));
diff --git a/core/modules/contact/src/Tests/Views/ContactFieldsTest.php b/core/modules/contact/src/Tests/Views/ContactFieldsTest.php
index cf707996f11b878d79e1652a2a5af9c02d2c594c..fafe451be5c18080a8b9a222d58961737dbca22c 100644
--- a/core/modules/contact/src/Tests/Views/ContactFieldsTest.php
+++ b/core/modules/contact/src/Tests/Views/ContactFieldsTest.php
@@ -19,7 +19,7 @@ class ContactFieldsTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('field', 'text', 'contact');
+  public static $modules = ['field', 'text', 'contact'];
 
   /**
    * Contains the field storage definition for contact used for this test.
@@ -31,11 +31,11 @@ class ContactFieldsTest extends ViewTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => strtolower($this->randomMachineName()),
       'entity_type' => 'contact_message',
       'type' => 'text'
-    ));
+    ]);
     $this->fieldStorage->save();
 
     ContactForm::create([
diff --git a/core/modules/contact/src/Tests/Views/ContactLinkTest.php b/core/modules/contact/src/Tests/Views/ContactLinkTest.php
index 738f67c1b449344adc737aef38ad78514ffa7e3e..f6b6013b43aef02f34bc24284032fb27fa26088c 100644
--- a/core/modules/contact/src/Tests/Views/ContactLinkTest.php
+++ b/core/modules/contact/src/Tests/Views/ContactLinkTest.php
@@ -27,14 +27,14 @@ class ContactLinkTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('contact_test_views');
+  public static $modules = ['contact_test_views'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_contact_link');
+  public static $testViews = ['test_contact_link'];
 
   /**
    * {@inheritdoc}
@@ -42,7 +42,7 @@ class ContactLinkTest extends ViewTestBase {
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('contact_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['contact_test_views']);
 
     $this->userData = $this->container->get('user.data');
   }
@@ -51,39 +51,39 @@ protected function setUp() {
    * Tests contact link.
    */
   public function testContactLink() {
-    $accounts = array();
+    $accounts = [];
     $accounts['root'] = User::load(1);
     // Create an account with access to all contact pages.
-    $admin_account = $this->drupalCreateUser(array('administer users'));
+    $admin_account = $this->drupalCreateUser(['administer users']);
     $accounts['admin'] = $admin_account;
     // Create an account with no access to contact pages.
     $no_contact_account = $this->drupalCreateUser();
     $accounts['no_contact'] = $no_contact_account;
 
     // Create an account with access to contact pages.
-    $contact_account = $this->drupalCreateUser(array('access user contact forms'));
+    $contact_account = $this->drupalCreateUser(['access user contact forms']);
     $accounts['contact'] = $contact_account;
 
     $this->drupalLogin($admin_account);
     $this->drupalGet('test-contact-link');
     // The admin user has access to all contact links beside his own.
-    $this->assertContactLinks($accounts, array('root', 'no_contact', 'contact'));
+    $this->assertContactLinks($accounts, ['root', 'no_contact', 'contact']);
 
     $this->drupalLogin($no_contact_account);
     $this->drupalGet('test-contact-link');
     // Ensure that the user without the permission doesn't see any link.
-    $this->assertContactLinks($accounts, array());
+    $this->assertContactLinks($accounts, []);
 
     $this->drupalLogin($contact_account);
     $this->drupalGet('test-contact-link');
-    $this->assertContactLinks($accounts, array('root', 'admin', 'no_contact'));
+    $this->assertContactLinks($accounts, ['root', 'admin', 'no_contact']);
 
     // Disable contact link for no_contact.
     $this->userData->set('contact', $no_contact_account->id(), 'enabled', FALSE);
     // @todo Remove cache invalidation in https://www.drupal.org/node/2477903.
     Cache::invalidateTags($no_contact_account->getCacheTagsToInvalidate());
     $this->drupalGet('test-contact-link');
-    $this->assertContactLinks($accounts, array('root', 'admin'));
+    $this->assertContactLinks($accounts, ['root', 'admin']);
   }
 
   /**
@@ -100,7 +100,7 @@ public function assertContactLinks(array $accounts, array $names) {
     foreach ($names as $name) {
       $account = $accounts[$name];
 
-      $result = $this->xpath('//div[contains(@class, "views-field-contact")]//a[contains(@href, :url)]', array(':url' => $account->url('contact-form')));
+      $result = $this->xpath('//div[contains(@class, "views-field-contact")]//a[contains(@href, :url)]', [':url' => $account->url('contact-form')]);
       $this->assertTrue(count($result));
     }
   }
diff --git a/core/modules/contact/tests/drupal-7.contact.database.php b/core/modules/contact/tests/drupal-7.contact.database.php
index 115f83c17cff6072ff12ba95840a8e2126aab40e..bd36384d7ea973011c490c05fb22b97bb68c6245 100644
--- a/core/modules/contact/tests/drupal-7.contact.database.php
+++ b/core/modules/contact/tests/drupal-7.contact.database.php
@@ -11,23 +11,23 @@
 
 // Update the default category to that it is not selected.
 db_update('contact')
-  ->fields(array('selected' => '0'))
+  ->fields(['selected' => '0'])
   ->condition('cid', '1')
   ->execute();
 
 // Add a custom contact category.
-db_insert('contact')->fields(array(
+db_insert('contact')->fields([
   'category',
   'recipients',
   'reply',
   'weight',
   'selected'
-))
-  ->values(array(
+])
+  ->values([
   'category' => 'Upgrade test',
   'recipients' => 'test1@example.com,test2@example.com',
   'reply' => 'Test reply',
   'weight' => 1,
   'selected' => 1,
-))
+])
   ->execute();
diff --git a/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module b/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module
index e20dc436fccd9d0a2255dad365f6fb2cd5b71baf..cef976c6ffefb7e6aa90b215d2afc9d74db53f12 100644
--- a/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module
+++ b/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module
@@ -15,7 +15,7 @@
  */
 function contact_storage_test_entity_base_field_info(EntityTypeInterface $entity_type) {
   if ($entity_type->id() == 'contact_message') {
-    $fields = array();
+    $fields = [];
 
     $fields['id'] = BaseFieldDefinition::create('integer')
       ->setLabel(t('Message ID'))
@@ -48,12 +48,12 @@ function contact_storage_test_entity_type_alter(array &$entity_types) {
 function contact_storage_test_form_contact_form_form_alter(&$form, FormStateInterface $form_state) {
   /** @var \Drupal\contact\ContactFormInterface $contact_form */
   $contact_form = $form_state->getFormObject()->getEntity();
-  $form['send_a_pony'] = array(
+  $form['send_a_pony'] = [
     '#type' => 'checkbox',
     '#title' => t('Send submitters a voucher for a free pony.'),
     '#description' => t('Enable to send an additional email with a free pony voucher to anyone who submits the form.'),
     '#default_value' => $contact_form->getThirdPartySetting('contact_storage_test', 'send_a_pony', FALSE),
-  );
+  ];
   $form['#entity_builders'][] = 'contact_storage_test_contact_form_form_builder';
 }
 /**
diff --git a/core/modules/contact/tests/src/Functional/ContactAuthenticatedUserTest.php b/core/modules/contact/tests/src/Functional/ContactAuthenticatedUserTest.php
index 4b4a520de67ae30d6b6ec147cd05397453499387..306fe5d41cc68e9285ecfcc70e38be5755074eca 100644
--- a/core/modules/contact/tests/src/Functional/ContactAuthenticatedUserTest.php
+++ b/core/modules/contact/tests/src/Functional/ContactAuthenticatedUserTest.php
@@ -16,20 +16,20 @@ class ContactAuthenticatedUserTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('contact');
+  public static $modules = ['contact'];
 
   /**
    * Tests that name and email fields are not present for authenticated users.
    */
   function testContactSiteWideTextfieldsLoggedInTestCase() {
-    $this->drupalLogin($this->drupalCreateUser(array('access site-wide contact form')));
+    $this->drupalLogin($this->drupalCreateUser(['access site-wide contact form']));
     $this->drupalGet('contact');
 
     // Ensure that there is no textfield for name.
-    $this->assertFalse($this->xpath('//input[@name=:name]', array(':name' => 'name')));
+    $this->assertFalse($this->xpath('//input[@name=:name]', [':name' => 'name']));
 
     // Ensure that there is no textfield for email.
-    $this->assertFalse($this->xpath('//input[@name=:name]', array(':name' => 'mail')));
+    $this->assertFalse($this->xpath('//input[@name=:name]', [':name' => 'mail']));
   }
 
 }
diff --git a/core/modules/contact/tests/src/Functional/ContactLanguageTest.php b/core/modules/contact/tests/src/Functional/ContactLanguageTest.php
index 47d15332d4e18ce697c355b598b072adab364390..0c34884503c166b32a295d680eab64cbacdf9549 100644
--- a/core/modules/contact/tests/src/Functional/ContactLanguageTest.php
+++ b/core/modules/contact/tests/src/Functional/ContactLanguageTest.php
@@ -20,11 +20,11 @@ class ContactLanguageTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'contact',
     'language',
     'contact_test',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -33,10 +33,10 @@ protected function setUp() {
     parent::setUp();
 
     // Create and log in administrative user.
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'access site-wide contact form',
       'administer languages',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
   }
 
diff --git a/core/modules/contact/tests/src/Kernel/MessageEntityTest.php b/core/modules/contact/tests/src/Kernel/MessageEntityTest.php
index 70ddea194e97a04e1844e7eb72a18f441b38ef7c..e7343b9166c64252afa186ccf870043515e70def 100644
--- a/core/modules/contact/tests/src/Kernel/MessageEntityTest.php
+++ b/core/modules/contact/tests/src/Kernel/MessageEntityTest.php
@@ -17,17 +17,17 @@ class MessageEntityTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'system',
     'contact',
     'field',
     'user',
     'contact_test',
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('contact', 'contact_test'));
+    $this->installConfig(['contact', 'contact_test']);
   }
 
   /**
@@ -35,7 +35,7 @@ protected function setUp() {
    */
   public function testMessageMethods() {
     $message_storage = $this->container->get('entity.manager')->getStorage('contact_message');
-    $message = $message_storage->create(array('contact_form' => 'feedback'));
+    $message = $message_storage->create(['contact_form' => 'feedback']);
 
     // Check for empty values first.
     $this->assertEqual($message->getMessage(), '');
diff --git a/core/modules/contact/tests/src/Kernel/Migrate/MigrateContactCategoryTest.php b/core/modules/contact/tests/src/Kernel/Migrate/MigrateContactCategoryTest.php
index 89f98b173996b15c791840b70f3dd0dd70a4311a..ffadad409c998ece74e3c9d9f4ef177765c4f5d6 100644
--- a/core/modules/contact/tests/src/Kernel/Migrate/MigrateContactCategoryTest.php
+++ b/core/modules/contact/tests/src/Kernel/Migrate/MigrateContactCategoryTest.php
@@ -18,7 +18,7 @@ class MigrateContactCategoryTest extends MigrateDrupal6TestBase {
    *
    * @var array
    */
-  public static $modules = array('contact');
+  public static $modules = ['contact'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/contact/tests/src/Unit/MailHandlerTest.php b/core/modules/contact/tests/src/Unit/MailHandlerTest.php
index 9e5c82c0c65e0fcb20ae7d3bbd29c039a64317cd..ce24cf4848aecba15b1157d4540fd86a1cdb5502 100644
--- a/core/modules/contact/tests/src/Unit/MailHandlerTest.php
+++ b/core/modules/contact/tests/src/Unit/MailHandlerTest.php
@@ -80,7 +80,7 @@ protected function setUp() {
 
     $string_translation = $this->getStringTranslationStub();
     $this->contactMailHandler = new MailHandler($this->mailManager, $this->languageManager, $this->logger, $string_translation, $this->entityManager);
-    $language = new Language(array('id' => 'en'));
+    $language = new Language(['id' => 'en']);
 
     $this->languageManager->expects($this->any())
       ->method('getDefaultLanguage')
@@ -156,76 +156,76 @@ function($module, $key, $to, $langcode, $params, $from) use (&$results) {
    * Data provider for ::testSendMailMessages.
    */
   public function getSendMailMessages() {
-    $data = array();
-    $recipients = array('admin@drupal.org', 'user@drupal.org');
-    $default_result = array(
+    $data = [];
+    $recipients = ['admin@drupal.org', 'user@drupal.org'];
+    $default_result = [
       'module' => 'contact',
       'key' => '',
       'to' => implode(', ', $recipients),
       'langcode' => 'en',
-      'params' => array(),
+      'params' => [],
       'from' => 'anonymous@drupal.org',
-    );
-    $results = array();
+    ];
+    $results = [];
     $message = $this->getAnonymousMockMessage($recipients, '');
     $sender = $this->getMockSender();
-    $result = array(
+    $result = [
       'key' => 'page_mail',
-      'params' => array(
+      'params' => [
         'contact_message' => $message,
         'sender' => $sender,
         'contact_form' => $message->getContactForm(),
-      ),
-    );
+      ],
+    ];
     $results[] = $result + $default_result;
-    $data[] = array($message, $sender, $results);
+    $data[] = [$message, $sender, $results];
 
-    $results = array();
+    $results = [];
     $message = $this->getAnonymousMockMessage($recipients, 'reply');
     $sender = $this->getMockSender();
-    $result = array(
+    $result = [
       'key' => 'page_mail',
-      'params' => array(
+      'params' => [
         'contact_message' => $message,
         'sender' => $sender,
         'contact_form' => $message->getContactForm(),
-      ),
-    );
+      ],
+    ];
     $results[] = $result + $default_result;
     $result['key'] = 'page_autoreply';
     $result['to'] = 'anonymous@drupal.org';
     $result['from'] = NULL;
     $results[] = $result + $default_result;
-    $data[] = array($message, $sender, $results);
+    $data[] = [$message, $sender, $results];
 
-    $results = array();
+    $results = [];
     $message = $this->getAnonymousMockMessage($recipients, '', TRUE);
     $sender = $this->getMockSender();
-    $result = array(
+    $result = [
       'key' => 'page_mail',
-      'params' => array(
+      'params' => [
         'contact_message' => $message,
         'sender' => $sender,
         'contact_form' => $message->getContactForm(),
-      ),
-    );
+      ],
+    ];
     $results[] = $result + $default_result;
     $result['key'] = 'page_copy';
     $result['to'] = 'anonymous@drupal.org';
     $results[] = $result + $default_result;
-    $data[] = array($message, $sender, $results);
+    $data[] = [$message, $sender, $results];
 
-    $results = array();
+    $results = [];
     $message = $this->getAnonymousMockMessage($recipients, 'reply', TRUE);
     $sender = $this->getMockSender();
-    $result = array(
+    $result = [
       'key' => 'page_mail',
-      'params' => array(
+      'params' => [
         'contact_message' => $message,
         'sender' => $sender,
         'contact_form' => $message->getContactForm(),
-      ),
-    );
+      ],
+    ];
     $results[] = $result + $default_result;
     $result['key'] = 'page_copy';
     $result['to'] = 'anonymous@drupal.org';
@@ -233,48 +233,48 @@ public function getSendMailMessages() {
     $result['key'] = 'page_autoreply';
     $result['from'] = NULL;
     $results[] = $result + $default_result;
-    $data[] = array($message, $sender, $results);
+    $data[] = [$message, $sender, $results];
 
     //For authenticated user.
-    $results = array();
+    $results = [];
     $message = $this->getAuthenticatedMockMessage();
     $sender = $this->getMockSender(FALSE, 'user@drupal.org');
-    $result = array(
+    $result = [
       'module' => 'contact',
       'key' => 'user_mail',
       'to' => 'user2@drupal.org',
       'langcode' => 'en',
-      'params' => array(
+      'params' => [
         'contact_message' => $message,
         'sender' => $sender,
         'recipient' => $message->getPersonalRecipient(),
-      ),
+      ],
       'from' => 'user@drupal.org',
-    );
+    ];
     $results[] = $result;
-    $data[] = array($message, $sender, $results);
+    $data[] = [$message, $sender, $results];
 
-    $results = array();
+    $results = [];
     $message = $this->getAuthenticatedMockMessage(TRUE);
     $sender = $this->getMockSender(FALSE, 'user@drupal.org');
-    $result = array(
+    $result = [
       'module' => 'contact',
       'key' => 'user_mail',
       'to' => 'user2@drupal.org',
       'langcode' => 'en',
-      'params' => array(
+      'params' => [
         'contact_message' => $message,
         'sender' => $sender,
         'recipient' => $message->getPersonalRecipient(),
-      ),
+      ],
       'from' => 'user@drupal.org',
-    );
+    ];
     $results[] = $result;
 
     $result['key'] = 'user_copy';
     $result['to'] = $result['from'];
     $results[] = $result;
-    $data[] = array($message, $sender, $results);
+    $data[] = [$message, $sender, $results];
 
     return $data;
   }
diff --git a/core/modules/content_moderation/src/ContentModerationStateStorageSchema.php b/core/modules/content_moderation/src/ContentModerationStateStorageSchema.php
index 19ec324c1a92833b8dc914ab0d7bc2fee5a997b5..cb87cc19ab80089ca7be1d69f2dd84c0e95e7138 100644
--- a/core/modules/content_moderation/src/ContentModerationStateStorageSchema.php
+++ b/core/modules/content_moderation/src/ContentModerationStateStorageSchema.php
@@ -19,9 +19,9 @@ protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $res
     // Creates an index to ensure that the lookup in
     // \Drupal\content_moderation\Plugin\Field\ModerationStateFieldItemList::getModerationState()
     // is performant.
-    $schema['content_moderation_state_field_data']['indexes'] += array(
-      'content_moderation_state__lookup' => array('content_entity_type_id', 'content_entity_id', 'content_entity_revision_id'),
-    );
+    $schema['content_moderation_state_field_data']['indexes'] += [
+      'content_moderation_state__lookup' => ['content_entity_type_id', 'content_entity_id', 'content_entity_revision_id'],
+    ];
 
     return $schema;
   }
diff --git a/core/modules/content_moderation/src/Entity/ContentModerationState.php b/core/modules/content_moderation/src/Entity/ContentModerationState.php
index 6d5b39c2b474b762113b1f50ddfbcb78155bf000..cb1bc1fe9fd5037722ac6b43682a41b47917a796 100644
--- a/core/modules/content_moderation/src/Entity/ContentModerationState.php
+++ b/core/modules/content_moderation/src/Entity/ContentModerationState.php
@@ -148,7 +148,7 @@ public static function updateOrCreateFromEntity(ContentModerationState $content_
    *   An array of default values.
    */
   public static function getCurrentUserId() {
-    return array(\Drupal::currentUser()->id());
+    return [\Drupal::currentUser()->id()];
   }
 
   /**
diff --git a/core/modules/content_moderation/src/ParamConverter/EntityRevisionConverter.php b/core/modules/content_moderation/src/ParamConverter/EntityRevisionConverter.php
index 980c61ebd887fb7c7d7433c77a2b74df7b5e055f..94f10e9f00eac39d750e71c25e05224b4f33ccd4 100644
--- a/core/modules/content_moderation/src/ParamConverter/EntityRevisionConverter.php
+++ b/core/modules/content_moderation/src/ParamConverter/EntityRevisionConverter.php
@@ -95,7 +95,7 @@ public function convert($value, $definition, $name, array $defaults) {
       // If the entity type is translatable, ensure we return the proper
       // translation object for the current context.
       if ($latest_revision instanceof EntityInterface && $entity instanceof TranslatableInterface) {
-        $latest_revision = $this->entityManager->getTranslationFromContext($latest_revision, NULL, array('operation' => 'entity_upcast'));
+        $latest_revision = $this->entityManager->getTranslationFromContext($latest_revision, NULL, ['operation' => 'entity_upcast']);
       }
 
       if ($latest_revision->isRevisionTranslationAffected()) {
diff --git a/core/modules/content_moderation/src/Plugin/Field/FieldWidget/ModerationStateWidget.php b/core/modules/content_moderation/src/Plugin/Field/FieldWidget/ModerationStateWidget.php
index 7fe5a6db9a56aba20c4495148cfdca577c04e5b4..970ac33a5dcc710356250b29bab6a8a91cac3ecc 100644
--- a/core/modules/content_moderation/src/Plugin/Field/FieldWidget/ModerationStateWidget.php
+++ b/core/modules/content_moderation/src/Plugin/Field/FieldWidget/ModerationStateWidget.php
@@ -139,7 +139,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       '#published' => $default->isPublishedState(),
       '#key_column' => $this->column,
     ];
-    $element['#element_validate'][] = array(get_class($this), 'validateElement');
+    $element['#element_validate'][] = [get_class($this), 'validateElement'];
 
     // Use the dropbutton.
     $element['#process'][] = [get_called_class(), 'processActions'];
diff --git a/core/modules/content_moderation/src/Tests/ModerationStateBlockTest.php b/core/modules/content_moderation/src/Tests/ModerationStateBlockTest.php
index e42f536b91d841d7c71c76e4dd3b59994cfc92de..593a9f961872c46ec69c24925842233094cba2af 100644
--- a/core/modules/content_moderation/src/Tests/ModerationStateBlockTest.php
+++ b/core/modules/content_moderation/src/Tests/ModerationStateBlockTest.php
@@ -73,11 +73,11 @@ public function testCustomBlockModeration() {
     $this->assertText(t('basic Moderated block has been created.'));
 
     // Place the block in the Sidebar First region.
-    $instance = array(
+    $instance = [
       'id' => 'moderated_block',
       'settings[label]' => $edit['info[0][value]'],
       'region' => 'sidebar_first',
-    );
+    ];
     $block = BlockContent::load(1);
     $url = 'admin/structure/block/add/block_content:' . $block->uuid() . '/' . $this->config('system.theme')->get('default');
     $this->drupalPostForm($url, $instance, t('Save block'));
diff --git a/core/modules/content_moderation/src/Tests/ModerationStateNodeTest.php b/core/modules/content_moderation/src/Tests/ModerationStateNodeTest.php
index fe36336176f0c1d7f06d0fccbe953445c6800ab4..49eee6d52718ccf5791e6805b1fb9038acef6c80 100644
--- a/core/modules/content_moderation/src/Tests/ModerationStateNodeTest.php
+++ b/core/modules/content_moderation/src/Tests/ModerationStateNodeTest.php
@@ -48,7 +48,7 @@ public function testCreatingContent() {
     $this->assertNoText('Published');
 
     // Delete the node.
-    $this->drupalPostForm('node/' . $node->id() . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('node/' . $node->id() . '/delete', [], t('Delete'));
     $this->assertText(t('The Moderated content moderated content has been deleted.'));
 
     // Disable content moderation.
diff --git a/core/modules/content_translation/content_translation.admin.inc b/core/modules/content_translation/content_translation.admin.inc
index 39e3247ca17bbe7d2645d7f8d6003496a3ad5bc7..f29a7e655637798ab76145289e86348080677a54 100644
--- a/core/modules/content_translation/content_translation.admin.inc
+++ b/core/modules/content_translation/content_translation.admin.inc
@@ -29,10 +29,10 @@
 function content_translation_field_sync_widget(FieldDefinitionInterface $field, $element_name = 'third_party_settings[content_translation][translation_sync]') {
   // No way to store field sync information on this field.
   if (!($field instanceof ThirdPartySettingsInterface)) {
-    return array();
+    return [];
   }
 
-  $element = array();
+  $element = [];
   $definition = \Drupal::service('plugin.manager.field.field_type')->getDefinition($field->getType());
   $column_groups = $definition['column_groups'];
   if (!empty($column_groups) && count($column_groups) > 1) {
@@ -50,12 +50,12 @@ function content_translation_field_sync_widget(FieldDefinitionInterface $field,
 
     $default = $field->getThirdPartySetting('content_translation', 'translation_sync', $default);
 
-    $element = array(
+    $element = [
       '#type' => 'checkboxes',
       '#title' => t('Translatable elements'),
       '#options' => $options,
       '#default_value' => $default,
-    );
+    ];
 
     if ($require_all_groups_for_translation) {
       // The actual checkboxes are sometimes rendered separately and the parent
@@ -96,7 +96,7 @@ function _content_translation_form_language_content_settings_form_alter(array &$
   $bundle_info_service = \Drupal::service('entity_type.bundle.info');
   foreach ($form['#labels'] as $entity_type_id => $label) {
     $entity_type = $entity_manager->getDefinition($entity_type_id);
-    $storage_definitions = $entity_type instanceof ContentEntityTypeInterface ? $entity_manager->getFieldStorageDefinitions($entity_type_id) : array();
+    $storage_definitions = $entity_type instanceof ContentEntityTypeInterface ? $entity_manager->getFieldStorageDefinitions($entity_type_id) : [];
 
     $entity_type_translatable = $content_translation_manager->isSupported($entity_type_id);
     foreach ($bundle_info_service->getBundleInfo($entity_type_id) as $bundle => $bundle_info) {
@@ -106,7 +106,7 @@ function _content_translation_form_language_content_settings_form_alter(array &$
       // about UI integration.
       $form['settings'][$entity_type_id][$bundle]['settings']['language']['#content_translation_skip_alter'] = TRUE;
       if (!$entity_type_translatable) {
-        $form['settings'][$entity_type_id]['#title'] = t('@label (Translation is not supported).', array('@label' => $entity_type->getLabel()));
+        $form['settings'][$entity_type_id]['#title'] = t('@label (Translation is not supported).', ['@label' => $entity_type->getLabel()]);
         continue;
       }
 
@@ -114,11 +114,11 @@ function _content_translation_form_language_content_settings_form_alter(array &$
       if ($fields) {
         foreach ($fields as $field_name => $definition) {
           if ($definition->isComputed() || (!empty($storage_definitions[$field_name]) && _content_translation_is_field_translatability_configurable($entity_type, $storage_definitions[$field_name]))) {
-            $form['settings'][$entity_type_id][$bundle]['fields'][$field_name] = array(
+            $form['settings'][$entity_type_id][$bundle]['fields'][$field_name] = [
               '#label' => $definition->getLabel(),
               '#type' => 'checkbox',
               '#default_value' => $definition->isTranslatable(),
-            );
+            ];
             // Display the column translatability configuration widget.
             $column_element = content_translation_field_sync_widget($definition, "settings[{$entity_type_id}][{$bundle}][columns][{$field_name}]");
             if ($column_element) {
@@ -129,10 +129,10 @@ function _content_translation_form_language_content_settings_form_alter(array &$
         if (!empty($form['settings'][$entity_type_id][$bundle]['fields'])) {
           // Only show the checkbox to enable translation if the bundles in the
           // entity might have fields and if there are fields to translate.
-          $form['settings'][$entity_type_id][$bundle]['translatable'] = array(
+          $form['settings'][$entity_type_id][$bundle]['translatable'] = [
             '#type' => 'checkbox',
             '#default_value' => $content_translation_manager->isEnabled($entity_type_id, $bundle),
-          );
+          ];
         }
       }
     }
@@ -177,102 +177,102 @@ function _content_translation_preprocess_language_content_settings_table(&$varia
   $element = $variables['element'];
   $build = &$variables['build'];
 
-  array_unshift($build['#header'], array('data' => t('Translatable'), 'class' => array('translatable')));
-  $rows = array();
+  array_unshift($build['#header'], ['data' => t('Translatable'), 'class' => ['translatable']]);
+  $rows = [];
 
   foreach (Element::children($element) as $bundle) {
-    $field_names = !empty($element[$bundle]['fields']) ? Element::children($element[$bundle]['fields']) : array();
+    $field_names = !empty($element[$bundle]['fields']) ? Element::children($element[$bundle]['fields']) : [];
     if (!empty($element[$bundle]['translatable'])) {
       $checkbox_id = $element[$bundle]['translatable']['#id'];
     }
     $rows[$bundle] = $build['#rows'][$bundle];
 
     if (!empty($element[$bundle]['translatable'])) {
-      $translatable = array(
+      $translatable = [
         'data' => $element[$bundle]['translatable'],
-        'class' => array('translatable'),
-      );
+        'class' => ['translatable'],
+      ];
       array_unshift($rows[$bundle]['data'], $translatable);
 
       $rows[$bundle]['data'][1]['data']['#prefix'] = '<label for="' . $checkbox_id . '">';
     }
     else {
-      $translatable = array(
+      $translatable = [
         'data' => t('N/A'),
-        'class' => array('untranslatable'),
-      );
+        'class' => ['untranslatable'],
+      ];
       array_unshift($rows[$bundle]['data'], $translatable);
     }
 
     foreach ($field_names as $field_name) {
       $field_element = &$element[$bundle]['fields'][$field_name];
-      $rows[] = array(
-        'data' => array(
-          array(
+      $rows[] = [
+        'data' => [
+          [
             'data' => drupal_render($field_element),
-            'class' => array('translatable'),
-          ),
-          array(
-            'data' => array(
+            'class' => ['translatable'],
+          ],
+          [
+            'data' => [
               '#prefix' => '<label for="' . $field_element['#id'] . '">',
               '#suffix' => '</label>',
-              'bundle' => array(
+              'bundle' => [
                 '#prefix' => '<span class="visually-hidden">',
                 '#suffix' => '</span> ',
                 '#plain_text' => $element[$bundle]['settings']['#label'],
-              ),
-              'field' => array(
+              ],
+              'field' => [
                 '#plain_text' => $field_element['#label'],
-              ),
-            ),
-            'class' => array('field'),
-          ),
-          array(
+              ],
+            ],
+            'class' => ['field'],
+          ],
+          [
             'data' => '',
-            'class' => array('operations'),
-          ),
-        ),
-        'class' => array('field-settings'),
-      );
+            'class' => ['operations'],
+          ],
+        ],
+        'class' => ['field-settings'],
+      ];
 
       if (!empty($element[$bundle]['columns'][$field_name])) {
         $column_element = &$element[$bundle]['columns'][$field_name];
         foreach (Element::children($column_element) as $key) {
           $column_label = $column_element[$key]['#title'];
           unset($column_element[$key]['#title']);
-          $rows[] = array(
-            'data' => array(
-              array(
+          $rows[] = [
+            'data' => [
+              [
                 'data' => drupal_render($column_element[$key]),
-                'class' => array('translatable'),
-              ),
-              array(
-                'data' => array(
+                'class' => ['translatable'],
+              ],
+              [
+                'data' => [
                   '#prefix' => '<label for="' . $column_element[$key]['#id'] . '">',
                   '#suffix' => '</label>',
-                  'bundle' => array(
+                  'bundle' => [
                     '#prefix' => '<span class="visually-hidden">',
                     '#suffix' => '</span> ',
                     '#plain_text' => $element[$bundle]['settings']['#label'],
-                  ),
-                  'field' => array(
+                  ],
+                  'field' => [
                     '#prefix' => '<span class="visually-hidden">',
                     '#suffix' => '</span> ',
                     '#plain_text' => $field_element['#label'],
-                  ),
-                  'columns' => array(
+                  ],
+                  'columns' => [
                     '#plain_text' => $column_label,
-                  ),
-                ),
-                'class' => array('column'),
-              ),
-              array(
+                  ],
+                ],
+                'class' => ['column'],
+              ],
+              [
                 'data' => '',
-                'class' => array('operations'),
-              ),
-            ),
-            'class' => array('column-settings'),
-          );
+                'class' => ['operations'],
+              ],
+            ],
+            'class' => ['column-settings'],
+          ];
         }
       }
     }
@@ -295,7 +295,7 @@ function content_translation_form_language_content_settings_validate(array $form
 
         $translatable_fields = isset($settings[$entity_type][$bundle]['fields']) ? array_filter($settings[$entity_type][$bundle]['fields']) : FALSE;
         if (empty($translatable_fields)) {
-          $t_args = array('%bundle' => $form['settings'][$entity_type][$bundle]['settings']['#label']);
+          $t_args = ['%bundle' => $form['settings'][$entity_type][$bundle]['settings']['#label']];
           $form_state->setErrorByName($name, t('At least one field needs to be translatable to enable %bundle for translation.', $t_args));
         }
 
@@ -304,7 +304,7 @@ function content_translation_form_language_content_settings_validate(array $form
           foreach (\Drupal::languageManager()->getLanguages(LanguageInterface::STATE_LOCKED) as $language) {
             $locked_languages[] = $language->getName();
           }
-          $form_state->setErrorByName($name, t('Translation is not supported if language is always one of: @locked_languages', array('@locked_languages' => implode(', ', $locked_languages))));
+          $form_state->setErrorByName($name, t('Translation is not supported if language is always one of: @locked_languages', ['@locked_languages' => implode(', ', $locked_languages)]));
         }
       }
     }
diff --git a/core/modules/content_translation/content_translation.module b/core/modules/content_translation/content_translation.module
index a8416db42b633fe17d2f2976f8feb294a008b6be..68fafbf07d5c7ec16ce5e0bd810b9b1667acabcd 100644
--- a/core/modules/content_translation/content_translation.module
+++ b/core/modules/content_translation/content_translation.module
@@ -23,11 +23,11 @@ function content_translation_help($route_name, RouteMatchInterface $route_match)
     case 'help.page.content_translation':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Content Translation module allows you to translate content, comments, custom blocks, taxonomy terms, users and other <a href=":field_help" title="Field module help, with background on content entities">content entities</a>. Together with the modules <a href=":language">Language</a>, <a href=":config-trans">Configuration Translation</a>, and <a href=":locale">Interface Translation</a>, it allows you to build multilingual websites. For more information, see the <a href=":translation-entity">online documentation for the Content Translation module</a>.', array(':locale' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', array('name' => 'locale')) : '#', ':config-trans' => (\Drupal::moduleHandler()->moduleExists('config_translation')) ? \Drupal::url('help.page', array('name' => 'config_translation')) : '#', ':language' => \Drupal::url('help.page', array('name' => 'language')), ':translation-entity' => 'https://www.drupal.org/documentation/modules/translation', ':field_help' => \Drupal::url('help.page', array('name' => 'field')))) . '</p>';
+      $output .= '<p>' . t('The Content Translation module allows you to translate content, comments, custom blocks, taxonomy terms, users and other <a href=":field_help" title="Field module help, with background on content entities">content entities</a>. Together with the modules <a href=":language">Language</a>, <a href=":config-trans">Configuration Translation</a>, and <a href=":locale">Interface Translation</a>, it allows you to build multilingual websites. For more information, see the <a href=":translation-entity">online documentation for the Content Translation module</a>.', [':locale' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', ['name' => 'locale']) : '#', ':config-trans' => (\Drupal::moduleHandler()->moduleExists('config_translation')) ? \Drupal::url('help.page', ['name' => 'config_translation']) : '#', ':language' => \Drupal::url('help.page', ['name' => 'language']), ':translation-entity' => 'https://www.drupal.org/documentation/modules/translation', ':field_help' => \Drupal::url('help.page', ['name' => 'field'])]) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Enabling translation') . '</dt>';
-      $output .= '<dd>' . t('In order to translate content, the website must have at least two <a href=":url">languages</a>. When that is the case, you can enable translation for the desired content entities on the <a href=":translation-entity">Content language</a> page. When enabling translation you can choose the default language for content and decide whether to show the language selection field on the content editing forms.', array(':url' => \Drupal::url('entity.configurable_language.collection'), ':translation-entity' => \Drupal::url('language.content_settings_page'), ':language-help' => \Drupal::url('help.page', array('name' => 'language')))) . '</dd>';
+      $output .= '<dd>' . t('In order to translate content, the website must have at least two <a href=":url">languages</a>. When that is the case, you can enable translation for the desired content entities on the <a href=":translation-entity">Content language</a> page. When enabling translation you can choose the default language for content and decide whether to show the language selection field on the content editing forms.', [':url' => \Drupal::url('entity.configurable_language.collection'), ':translation-entity' => \Drupal::url('language.content_settings_page'), ':language-help' => \Drupal::url('help.page', ['name' => 'language'])]) . '</dd>';
       $output .= '<dt>' . t('Enabling field translation') . '</dt>';
       $output .= '<dd>' . t('You can define which fields of a content entity can be translated. For example, you might want to translate the title and body field while leaving the image field untranslated. If you exclude a field from being translated, it will still show up in the content editing form, but any changes made to that field will be applied to <em>all</em> translations of that content.') . '</dd>';
       $output .= '<dt>' . t('Translating content') . '</dt>';
@@ -42,7 +42,7 @@ function content_translation_help($route_name, RouteMatchInterface $route_match)
     case 'language.content_settings_page':
       $output = '';
       if (!\Drupal::languageManager()->isMultilingual()) {
-        $output .= '<p>' . t('Before you can translate content, there must be at least two languages added on the <a href=":url">languages administration</a> page.', array(':url' => \Drupal::url('entity.configurable_language.collection'))) . '</p>';
+        $output .= '<p>' . t('Before you can translate content, there must be at least two languages added on the <a href=":url">languages administration</a> page.', [':url' => \Drupal::url('entity.configurable_language.collection')]) . '</p>';
       }
       return $output;
   }
@@ -134,7 +134,7 @@ function content_translation_entity_type_alter(array &$entity_types) {
 
       $translation = $entity_type->get('translation');
       if (!$translation || !isset($translation['content_translation'])) {
-        $translation['content_translation'] = array();
+        $translation['content_translation'] = [];
       }
 
       if ($entity_type->hasLinkTemplate('canonical')) {
@@ -148,9 +148,9 @@ function content_translation_entity_type_alter(array &$entity_types) {
         }
         // @todo Remove this as soon as menu access checks rely on the
         //   controller. See https://www.drupal.org/node/2155787.
-        $translation['content_translation'] += array(
+        $translation['content_translation'] += [
           'access_callback' => 'content_translation_translate_access',
-        );
+        ];
       }
       $entity_type->set('translation', $translation);
     }
@@ -215,7 +215,7 @@ function content_translation_field_info_alter(&$info) {
   foreach ($info as $key => $settings) {
     // Supply the column_groups key if it's not there.
     if (empty($settings['column_groups'])) {
-      $info[$key]['column_groups'] = array();
+      $info[$key]['column_groups'] = [];
     }
   }
 }
@@ -224,13 +224,13 @@ function content_translation_field_info_alter(&$info) {
  * Implements hook_entity_operation().
  */
 function content_translation_entity_operation(EntityInterface $entity) {
-  $operations = array();
+  $operations = [];
   if ($entity->hasLinkTemplate('drupal:content-translation-overview') && content_translation_translate_access($entity)->isAllowed()) {
-    $operations['translate'] = array(
+    $operations['translate'] = [
       'title' => t('Translate'),
       'url' => $entity->urlInfo('drupal:content-translation-overview'),
       'weight' => 50,
-    );
+    ];
   }
   return $operations;
 }
@@ -350,16 +350,16 @@ function content_translation_language_fallback_candidates_entity_view_alter(&$ca
  * Implements hook_entity_extra_field_info().
  */
 function content_translation_entity_extra_field_info() {
-  $extra = array();
+  $extra = [];
   $bundle_info_service = \Drupal::service('entity_type.bundle.info');
   foreach (\Drupal::entityManager()->getDefinitions() as $entity_type => $info) {
     foreach ($bundle_info_service->getBundleInfo($entity_type) as $bundle => $bundle_info) {
       if (\Drupal::service('content_translation.manager')->isEnabled($entity_type, $bundle)) {
-        $extra[$entity_type][$bundle]['form']['translation'] = array(
+        $extra[$entity_type][$bundle]['form']['translation'] = [
           'label' => t('Translation'),
           'description' => t('Translation settings'),
           'weight' => 10,
-        );
+        ];
       }
     }
   }
@@ -374,23 +374,23 @@ function content_translation_form_field_config_edit_form_alter(array &$form, For
   $field = $form_state->getFormObject()->getEntity();
   $bundle_is_translatable = \Drupal::service('content_translation.manager')->isEnabled($field->getTargetEntityTypeId(), $field->getTargetBundle());
 
-  $form['translatable'] = array(
+  $form['translatable'] = [
     '#type' => 'checkbox',
     '#title' => t('Users may translate this field'),
     '#default_value' => $field->isTranslatable(),
     '#weight' => -1,
     '#disabled' => !$bundle_is_translatable,
     '#access' => $field->getFieldStorageDefinition()->isTranslatable(),
-  );
+  ];
 
   // Provide helpful pointers for administrators.
   if (\Drupal::currentUser()->hasPermission('administer content translation') &&  !$bundle_is_translatable) {
-    $toggle_url = \Drupal::url('language.content_settings_page', array(), array(
+    $toggle_url = \Drupal::url('language.content_settings_page', [], [
       'query' => \Drupal::destination()->getAsArray(),
-    ));
-    $form['translatable']['#description'] = t('To configure translation for this field, <a href=":language-settings-url">enable language support</a> for this type.', array(
+    ]);
+    $form['translatable']['#description'] = t('To configure translation for this field, <a href=":language-settings-url">enable language support</a> for this type.', [
       ':language-settings-url' => $toggle_url,
-    ));
+    ]);
   }
 
   if ($field->isTranslatable()) {
@@ -454,7 +454,7 @@ function content_translation_enable_widget($entity_type, $bundle, array &$form,
   $context = $form_state->get(['language', $key]) ?: [];
   $context += ['entity_type' => $entity_type, 'bundle' => $bundle];
   $form_state->set(['language', $key], $context);
-  $element = content_translation_language_configuration_element_process(array('#name' => $key), $form_state, $form);
+  $element = content_translation_language_configuration_element_process(['#name' => $key], $form_state, $form);
   unset($element['content_translation']['#element_validate']);
   return $element;
 }
@@ -474,14 +474,14 @@ function content_translation_language_configuration_element_process(array $eleme
     $form_state->set(['content_translation', 'key'], $key);
     $context = $form_state->get(['language', $key]);
 
-    $element['content_translation'] = array(
+    $element['content_translation'] = [
       '#type' => 'checkbox',
       '#title' => t('Enable translation'),
       // For new bundle, we don't know the bundle name yet,
       // default to no translatability.
       '#default_value' => $context['bundle'] ? \Drupal::service('content_translation.manager')->isEnabled($context['entity_type'], $context['bundle']) : FALSE,
-      '#element_validate' => array('content_translation_language_configuration_element_validate'),
-    );
+      '#element_validate' => ['content_translation_language_configuration_element_validate'],
+    ];
 
     $submit_name = isset($form['actions']['save_continue']) ? 'save_continue' : 'submit';
     // Only add the submit handler on the submit button if the #submit property
@@ -515,7 +515,7 @@ function content_translation_language_configuration_element_validate($element, F
     // @todo Set the correct form element name as soon as the element parents
     //   are correctly set. We should be using NestedArray::getValue() but for
     //   now we cannot.
-    $form_state->setErrorByName('', t('"Show language selector" is not compatible with translating content that has default language: %choice. Either do not hide the language selector or pick a specific language.', array('%choice' => $locked_languages[$values['langcode']])));
+    $form_state->setErrorByName('', t('"Show language selector" is not compatible with translating content that has default language: %choice. Either do not hide the language selector or pick a specific language.', ['%choice' => $locked_languages[$values['langcode']]]));
   }
 }
 
@@ -529,7 +529,7 @@ function content_translation_language_configuration_element_validate($element, F
 function content_translation_language_configuration_element_submit(array $form, FormStateInterface $form_state) {
   $key = $form_state->get(['content_translation', 'key']);
   $context = $form_state->get(['language', $key]);
-  $enabled = $form_state->getValue(array($key, 'content_translation'));
+  $enabled = $form_state->getValue([$key, 'content_translation']);
 
   if (\Drupal::service('content_translation.manager')->isEnabled($context['entity_type'], $context['bundle']) != $enabled) {
     \Drupal::service('content_translation.manager')->setEnabled($context['entity_type'], $context['bundle'], $enabled);
@@ -579,14 +579,14 @@ function content_translation_page_attachments(&$page) {
           ->setOption('language', $language)
           ->setAbsolute()
           ->toString();
-        $page['#attached']['html_head_link'][] = array(
-          array(
+        $page['#attached']['html_head_link'][] = [
+          [
             'rel' => 'alternate',
             'hreflang' => $language->getId(),
             'href' => $url,
-          ),
+          ],
           TRUE,
-        );
+        ];
       }
     }
     // Since entity was found, no need to iterate further.
diff --git a/core/modules/content_translation/src/ContentTranslationHandler.php b/core/modules/content_translation/src/ContentTranslationHandler.php
index c15506955113bfc236ef9661f1a4220d13577377..9a6050d794218ae5d99ca3cf48759c360ce90ad3 100644
--- a/core/modules/content_translation/src/ContentTranslationHandler.php
+++ b/core/modules/content_translation/src/ContentTranslationHandler.php
@@ -110,7 +110,7 @@ public static function createInstance(ContainerInterface $container, EntityTypeI
    * {@inheritdoc}
    */
   public function getFieldDefinitions() {
-    $definitions = array();
+    $definitions = [];
 
     $definitions['content_translation_source'] = BaseFieldDefinition::create('language')
       ->setLabel(t('Translation source'))
@@ -287,7 +287,7 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
       $title = $this->entityFormTitle($entity);
       // When editing the original values display just the entity label.
       if ($is_translation) {
-        $t_args = array('%language' => $languages[$form_langcode]->getName(), '%title' => $entity->label(), '@title' => $title);
+        $t_args = ['%language' => $languages[$form_langcode]->getName(), '%title' => $entity->label(), '@title' => $title];
         $title = empty($source_langcode) ? t('@title [%language translation]', $t_args) : t('Create %language translation of %title', $t_args);
       }
       $form['#title'] = $title;
@@ -296,25 +296,25 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
     // Display source language selector only if we are creating a new
     // translation and there are at least two translations available.
     if ($has_translations && $new_translation) {
-      $form['source_langcode'] = array(
+      $form['source_langcode'] = [
         '#type' => 'details',
-        '#title' => t('Source language: @language', array('@language' => $languages[$source_langcode]->getName())),
+        '#title' => t('Source language: @language', ['@language' => $languages[$source_langcode]->getName()]),
         '#tree' => TRUE,
         '#weight' => -100,
         '#multilingual' => TRUE,
-        'source' => array(
+        'source' => [
           '#title' => t('Select source language'),
           '#title_display' => 'invisible',
           '#type' => 'select',
           '#default_value' => $source_langcode,
-          '#options' => array(),
-        ),
-        'submit' => array(
+          '#options' => [],
+        ],
+        'submit' => [
           '#type' => 'submit',
           '#value' => t('Change'),
-          '#submit' => array(array($this, 'entityFormSourceChange')),
-        ),
-      );
+          '#submit' => [[$this, 'entityFormSourceChange']],
+        ],
+      ];
       foreach ($this->languageManager->getLanguages() as $language) {
         if (isset($translations[$language->getId()])) {
           $form['source_langcode']['source']['#options'][$language->getId()] = $language->getName();
@@ -335,7 +335,7 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
     if (isset($language_widget['widget'][0]['value']) && !$is_translation && $has_translations) {
       $language_select = &$language_widget['widget'][0]['value'];
       if ($language_select['#type'] == 'language_select') {
-        $options = array();
+        $options = [];
         foreach ($this->languageManager->getLanguages() as $language) {
           // Show the current language, and the languages for which no
           // translation already exists.
@@ -354,20 +354,20 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
       // Replace the delete button with the delete translation one.
       if (!$new_translation) {
         $weight = 100;
-        foreach (array('delete', 'submit') as $key) {
+        foreach (['delete', 'submit'] as $key) {
           if (isset($form['actions'][$key]['weight'])) {
             $weight = $form['actions'][$key]['weight'];
             break;
           }
         }
         $access = $this->getTranslationAccess($entity, 'delete')->isAllowed() || ($entity->access('delete') && $this->entityType->hasLinkTemplate('delete-form'));
-        $form['actions']['delete_translation'] = array(
+        $form['actions']['delete_translation'] = [
           '#type' => 'submit',
           '#value' => t('Delete translation'),
           '#weight' => $weight,
-          '#submit' => array(array($this, 'entityFormDeleteTranslation')),
+          '#submit' => [[$this, 'entityFormDeleteTranslation']],
           '#access' => $access,
-        );
+        ];
       }
 
       // Always remove the delete button on translation forms.
@@ -377,23 +377,23 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
     // We need to display the translation tab only when there is at least one
     // translation available or a new one is about to be created.
     if ($new_translation || $has_translations) {
-      $form['content_translation'] = array(
+      $form['content_translation'] = [
         '#type' => 'details',
         '#title' => t('Translation'),
         '#tree' => TRUE,
         '#weight' => 10,
         '#access' => $this->getTranslationAccess($entity, $source_langcode ? 'create' : 'update')->isAllowed(),
         '#multilingual' => TRUE,
-      );
+      ];
 
       if (isset($form['advanced'])) {
-        $form['content_translation'] += array(
+        $form['content_translation'] += [
           '#group' => 'advanced',
           '#weight' => 100,
-          '#attributes' => array(
-            'class' => array('entity-translation-options'),
-          ),
-        );
+          '#attributes' => [
+            'class' => ['entity-translation-options'],
+          ],
+        ];
       }
 
       // A new translation is enabled by default.
@@ -414,30 +414,30 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
         t('An unpublished translation will not be visible without translation permissions.') :
         t('Only this translation is published. You must publish at least one more translation to unpublish this one.');
 
-      $form['content_translation']['status'] = array(
+      $form['content_translation']['status'] = [
         '#type' => 'checkbox',
         '#title' => t('This translation is published'),
         '#default_value' => $status,
         '#description' => $description,
         '#disabled' => !$enabled,
-      );
+      ];
 
       $translate = !$new_translation && $metadata->isOutdated();
       if (!$translate) {
-        $form['content_translation']['retranslate'] = array(
+        $form['content_translation']['retranslate'] = [
           '#type' => 'checkbox',
           '#title' => t('Flag other translations as outdated'),
           '#default_value' => FALSE,
           '#description' => t('If you made a significant change, which means the other translations should be updated, you can flag all translations of this content as outdated. This will not change any other property of them, like whether they are published or not.'),
-        );
+        ];
       }
       else {
-        $form['content_translation']['outdated'] = array(
+        $form['content_translation']['outdated'] = [
           '#type' => 'checkbox',
           '#title' => t('This translation needs to be updated'),
           '#default_value' => $translate,
           '#description' => t('When this option is checked, this translation needs to be updated. Uncheck when the translation is up to date again.'),
-        );
+        ];
         $form['content_translation']['#open'] = TRUE;
       }
 
@@ -449,7 +449,7 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
       elseif (($account = $metadata->getAuthor()) && $account->id()) {
         $uid = $account->id();
       }
-      $form['content_translation']['uid'] = array(
+      $form['content_translation']['uid'] = [
         '#type' => 'entity_autocomplete',
         '#title' => t('Authored by'),
         '#target_type' => 'user',
@@ -457,34 +457,34 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
         // Validation is done by static::entityFormValidate().
         '#validate_reference' => FALSE,
         '#maxlength' => 60,
-        '#description' => t('Leave blank for %anonymous.', array('%anonymous' => \Drupal::config('user.settings')->get('anonymous'))),
-      );
+        '#description' => t('Leave blank for %anonymous.', ['%anonymous' => \Drupal::config('user.settings')->get('anonymous')]),
+      ];
 
       $date = $new_translation ? REQUEST_TIME : $metadata->getCreatedTime();
-      $form['content_translation']['created'] = array(
+      $form['content_translation']['created'] = [
         '#type' => 'textfield',
         '#title' => t('Authored on'),
         '#maxlength' => 25,
-        '#description' => t('Format: %time. The date format is YYYY-MM-DD and %timezone is the time zone offset from UTC. Leave blank to use the time of form submission.', array('%time' => format_date(REQUEST_TIME, 'custom', 'Y-m-d H:i:s O'), '%timezone' => format_date(REQUEST_TIME, 'custom', 'O'))),
+        '#description' => t('Format: %time. The date format is YYYY-MM-DD and %timezone is the time zone offset from UTC. Leave blank to use the time of form submission.', ['%time' => format_date(REQUEST_TIME, 'custom', 'Y-m-d H:i:s O'), '%timezone' => format_date(REQUEST_TIME, 'custom', 'O')]),
         '#default_value' => $new_translation || !$date ? '' : format_date($date, 'custom', 'Y-m-d H:i:s O'),
-      );
+      ];
 
       if (isset($language_widget)) {
         $language_widget['#multilingual'] = TRUE;
       }
 
-      $form['#process'][] = array($this, 'entityFormSharedElements');
+      $form['#process'][] = [$this, 'entityFormSharedElements'];
     }
 
     // Process the submitted values before they are stored.
-    $form['#entity_builders'][] = array($this, 'entityFormEntityBuild');
+    $form['#entity_builders'][] = [$this, 'entityFormEntityBuild'];
 
     // Handle entity validation.
-    $form['#validate'][] = array($this, 'entityFormValidate');
+    $form['#validate'][] = [$this, 'entityFormValidate'];
 
     // Handle entity deletion.
     if (isset($form['actions']['delete'])) {
-      $form['actions']['delete']['#submit'][] = array($this, 'entityFormDelete');
+      $form['actions']['delete']['#submit'][] = [$this, 'entityFormDelete'];
     }
 
     // Handle entity form submission before the entity has been saved.
@@ -506,7 +506,7 @@ public function entityFormSharedElements($element, FormStateInterface $form_stat
     // @todo Find a more reliable way to determine if a form element concerns a
     //   multilingual value.
     if (!isset($ignored_types)) {
-      $ignored_types = array_flip(array('actions', 'value', 'hidden', 'vertical_tabs', 'token', 'details'));
+      $ignored_types = array_flip(['actions', 'value', 'hidden', 'vertical_tabs', 'token', 'details']);
     }
 
     foreach (Element::children($element) as $key) {
@@ -551,7 +551,7 @@ protected function addTranslatabilityClue(&$element) {
     // Elements which can have a #title attribute according to FAPI Reference.
     if (!isset($suffix)) {
       $suffix = ' <span class="translation-entity-all-languages">(' . t('all languages') . ')</span>';
-      $fapi_title_elements = array_flip(array('checkbox', 'checkboxes', 'date', 'details', 'fieldset', 'file', 'item', 'password', 'password_confirm', 'radio', 'radios', 'select', 'text_format', 'textarea', 'textfield', 'weight'));
+      $fapi_title_elements = array_flip(['checkbox', 'checkboxes', 'date', 'details', 'fieldset', 'file', 'item', 'password', 'password_confirm', 'radio', 'radios', 'select', 'text_format', 'textarea', 'textfield', 'weight']);
     }
 
     // Update #title attribute for all elements that are allowed to have a
@@ -587,7 +587,7 @@ protected function addTranslatabilityClue(&$element) {
   public function entityFormEntityBuild($entity_type, EntityInterface $entity, array $form, FormStateInterface $form_state) {
     $form_object = $form_state->getFormObject();
     $form_langcode = $form_object->getFormLangcode($form_state);
-    $values = &$form_state->getValue('content_translation', array());
+    $values = &$form_state->getValue('content_translation', []);
 
     $metadata = $this->manager->getTranslationMetadata($entity);
     $metadata->setAuthor(!empty($values['uid']) ? User::load($values['uid']) : User::load(0));
@@ -615,7 +615,7 @@ function entityFormValidate($form, FormStateInterface $form_state) {
       $translation = $form_state->getValue('content_translation');
       // Validate the "authored by" field.
       if (!empty($translation['uid']) && !($account = User::load($translation['uid']))) {
-        $form_state->setErrorByName('content_translation][uid', t('The translation authoring username %name does not exist.', array('%name' => $account->getUsername())));
+        $form_state->setErrorByName('content_translation][uid', t('The translation authoring username %name does not exist.', ['%name' => $account->getUsername()]));
       }
       // Validate the "authored on" field.
       if (!empty($translation['created']) && strtotime($translation['created']) === FALSE) {
@@ -656,16 +656,16 @@ function entityFormSubmit($form, FormStateInterface $form_state) {
   public function entityFormSourceChange($form, FormStateInterface $form_state) {
     $form_object = $form_state->getFormObject();
     $entity = $form_object->getEntity();
-    $source = $form_state->getValue(array('source_langcode', 'source'));
+    $source = $form_state->getValue(['source_langcode', 'source']);
 
     $entity_type_id = $entity->getEntityTypeId();
-    $form_state->setRedirect("entity.$entity_type_id.content_translation_add", array(
+    $form_state->setRedirect("entity.$entity_type_id.content_translation_add", [
       $entity_type_id => $entity->id(),
       'source' => $source,
       'target' => $form_object->getFormLangcode($form_state),
-    ));
+    ]);
     $languages = $this->languageManager->getLanguages();
-    drupal_set_message(t('Source language set to: %language', array('%language' => $languages[$source]->getName())));
+    drupal_set_message(t('Source language set to: %language', ['%language' => $languages[$source]->getName()]));
   }
 
   /**
@@ -677,7 +677,7 @@ function entityFormDelete($form, FormStateInterface $form_state) {
     $form_object = $form_state->getFormObject()->getEntity();
     $entity = $form_object->getEntity();
     if (count($entity->getTranslationLanguages()) > 1) {
-      drupal_set_message(t('This will delete all the translations of %label.', array('%label' => $entity->label())), 'warning');
+      drupal_set_message(t('This will delete all the translations of %label.', ['%label' => $entity->label()]), 'warning');
     }
   }
 
diff --git a/core/modules/content_translation/src/ContentTranslationManager.php b/core/modules/content_translation/src/ContentTranslationManager.php
index a1c2391e437480c37aef6e4b9d740137e7eda67e..70adc289bf26e44cd4fcde36e781290d8c3a1c83 100644
--- a/core/modules/content_translation/src/ContentTranslationManager.php
+++ b/core/modules/content_translation/src/ContentTranslationManager.php
@@ -66,7 +66,7 @@ public function isSupported($entity_type_id) {
    * {@inheritdoc}
    */
   public function getSupportedEntityTypes() {
-    $supported_types = array();
+    $supported_types = [];
     foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
       if ($this->isSupported($entity_type_id)) {
         $supported_types[$entity_type_id] = $entity_type;
@@ -82,7 +82,7 @@ public function setEnabled($entity_type_id, $bundle, $value) {
     $config = $this->loadContentLanguageSettings($entity_type_id, $bundle);
     $config->setThirdPartySetting('content_translation', 'enabled', $value)->save();
     $entity_type = $this->entityManager->getDefinition($entity_type_id);
-    $this->updatesManager->updateDefinitions(array($entity_type_id => $entity_type));
+    $this->updatesManager->updateDefinitions([$entity_type_id => $entity_type]);
   }
 
   /**
@@ -92,7 +92,7 @@ public function isEnabled($entity_type_id, $bundle = NULL) {
     $enabled = FALSE;
 
     if ($this->isSupported($entity_type_id)) {
-      $bundles = !empty($bundle) ? array($bundle) : array_keys($this->entityManager->getBundleInfo($entity_type_id));
+      $bundles = !empty($bundle) ? [$bundle] : array_keys($this->entityManager->getBundleInfo($entity_type_id));
       foreach ($bundles as $bundle) {
         $config = $this->loadContentLanguageSettings($entity_type_id, $bundle);
         if ($config->getThirdPartySetting('content_translation', 'enabled', FALSE)) {
diff --git a/core/modules/content_translation/src/Controller/ContentTranslationController.php b/core/modules/content_translation/src/Controller/ContentTranslationController.php
index 43b59aaf1e167597dbbb9d12e530c736eef565ed..c97f185a63f368b4adc9845d6c7e8e978410535c 100644
--- a/core/modules/content_translation/src/Controller/ContentTranslationController.php
+++ b/core/modules/content_translation/src/Controller/ContentTranslationController.php
@@ -97,7 +97,7 @@ public function overview(RouteMatchInterface $route_match, $entity_type_id = NUL
     $translations = $entity->getTranslationLanguages();
     $field_ui = $this->moduleHandler()->moduleExists('field_ui') && $account->hasPermission('administer ' . $entity_type_id . ' fields');
 
-    $rows = array();
+    $rows = [];
     $show_source_column = FALSE;
 
     if ($this->languageManager()->isMultilingual()) {
@@ -123,41 +123,41 @@ public function overview(RouteMatchInterface $route_match, $entity_type_id = NUL
 
         $add_url = new Url(
           "entity.$entity_type_id.content_translation_add",
-          array(
+          [
             'source' => $original,
             'target' => $language->getId(),
             $entity_type_id => $entity->id(),
-          ),
-          array(
+          ],
+          [
             'language' => $language,
-          )
+          ]
         );
         $edit_url = new Url(
           "entity.$entity_type_id.content_translation_edit",
-          array(
+          [
             'language' => $language->getId(),
             $entity_type_id => $entity->id(),
-          ),
-          array(
+          ],
+          [
             'language' => $language,
-          )
+          ]
         );
         $delete_url = new Url(
           "entity.$entity_type_id.content_translation_delete",
-          array(
+          [
             'language' => $language->getId(),
             $entity_type_id => $entity->id(),
-          ),
-          array(
+          ],
+          [
             'language' => $language,
-          )
+          ]
         );
-        $operations = array(
-          'data' => array(
+        $operations = [
+          'data' => [
             '#type' => 'operations',
-            '#links' => array(),
-          ),
-        );
+            '#links' => [],
+          ],
+        ];
 
         $links = &$operations['data']['#links'];
         if (array_key_exists($langcode, $translations)) {
@@ -167,7 +167,7 @@ public function overview(RouteMatchInterface $route_match, $entity_type_id = NUL
           $source = $metadata->getSource() ?: LanguageInterface::LANGCODE_NOT_SPECIFIED;
           $is_original = $langcode == $original;
           $label = $entity->getTranslation($langcode)->label();
-          $link = isset($links->links[$langcode]['url']) ? $links->links[$langcode] : array('url' => $entity->urlInfo());
+          $link = isset($links->links[$langcode]['url']) ? $links->links[$langcode] : ['url' => $entity->urlInfo()];
           if (!empty($link['url'])) {
             $link['url']->setOption('language', $language);
             $row_title = $this->l($label, $link['url']);
@@ -196,17 +196,17 @@ public function overview(RouteMatchInterface $route_match, $entity_type_id = NUL
           if (isset($links['edit'])) {
             $links['edit']['title'] = $this->t('Edit');
           }
-          $status = array('data' => array(
+          $status = ['data' => [
             '#type' => 'inline_template',
             '#template' => '<span class="status">{% if status %}{{ "Published"|t }}{% else %}{{ "Not published"|t }}{% endif %}</span>{% if outdated %} <span class="marker">{{ "outdated"|t }}</span>{% endif %}',
-            '#context' => array(
+            '#context' => [
               'status' => $metadata->isPublished(),
               'outdated' => $metadata->isOutdated(),
-            ),
-          ));
+            ],
+          ]];
 
           if ($is_original) {
-            $language_name = $this->t('<strong>@language_name (Original language)</strong>', array('@language_name' => $language_name));
+            $language_name = $this->t('<strong>@language_name (Original language)</strong>', ['@language_name' => $language_name]);
             $source_name = $this->t('n/a');
           }
           else {
@@ -217,17 +217,17 @@ public function overview(RouteMatchInterface $route_match, $entity_type_id = NUL
               ->merge(CacheableMetadata::createFromObject($delete_access))
               ->merge(CacheableMetadata::createFromObject($translation_access));
             if ($entity->access('delete') && $entity_type->hasLinkTemplate('delete-form')) {
-              $links['delete'] = array(
+              $links['delete'] = [
                 'title' => $this->t('Delete'),
                 'url' => $entity->urlInfo('delete-form'),
                 'language' => $language,
-              );
+              ];
             }
             elseif ($translation_access->isAllowed()) {
-              $links['delete'] = array(
+              $links['delete'] = [
                 'title' => $this->t('Delete'),
                 'url' => $delete_url,
-              );
+              ];
             }
           }
         }
@@ -241,58 +241,58 @@ public function overview(RouteMatchInterface $route_match, $entity_type_id = NUL
             ->merge(CacheableMetadata::createFromObject($create_translation_access));
           if ($source != $langcode && $create_translation_access->isAllowed()) {
             if ($translatable) {
-              $links['add'] = array(
+              $links['add'] = [
                 'title' => $this->t('Add'),
                 'url' => $add_url,
-              );
+              ];
             }
             elseif ($field_ui) {
               $url = new Url('language.content_settings_page');
 
               // Link directly to the fields tab to make it easier to find the
               // setting to enable translation on fields.
-              $links['nofields'] = array(
+              $links['nofields'] = [
                 'title' => $this->t('No translatable fields'),
                 'url' => $url,
-              );
+              ];
             }
           }
 
           $status = $this->t('Not translated');
         }
         if ($show_source_column) {
-          $rows[] = array(
+          $rows[] = [
             $language_name,
             $row_title,
             $source_name,
             $status,
             $operations,
-          );
+          ];
         }
         else {
-          $rows[] = array($language_name, $row_title, $status, $operations);
+          $rows[] = [$language_name, $row_title, $status, $operations];
         }
       }
     }
     if ($show_source_column) {
-      $header = array(
+      $header = [
         $this->t('Language'),
         $this->t('Translation'),
         $this->t('Source language'),
         $this->t('Status'),
         $this->t('Operations'),
-      );
+      ];
     }
     else {
-      $header = array(
+      $header = [
         $this->t('Language'),
         $this->t('Translation'),
         $this->t('Status'),
         $this->t('Operations'),
-      );
+      ];
     }
 
-    $build['#title'] = $this->t('Translations of %label', array('%label' => $entity->label()));
+    $build['#title'] = $this->t('Translations of %label', ['%label' => $entity->label()]);
 
     // Add metadata to the build render array to let other modules know about
     // which entity this is.
@@ -301,11 +301,11 @@ public function overview(RouteMatchInterface $route_match, $entity_type_id = NUL
       ->addCacheTags($entity->getCacheTags())
       ->applyTo($build);
 
-    $build['content_translation_overview'] = array(
+    $build['content_translation_overview'] = [
       '#theme' => 'table',
       '#header' => $header,
       '#rows' => $rows,
-    );
+    ];
 
     return $build;
   }
@@ -339,7 +339,7 @@ public function add(LanguageInterface $source, LanguageInterface $target, RouteM
     //   See https://www.drupal.org/node/2006348.
     $operation = 'default';
 
-    $form_state_additions = array();
+    $form_state_additions = [];
     $form_state_additions['langcode'] = $target->getId();
     $form_state_additions['content_translation']['source'] = $source;
     $form_state_additions['content_translation']['target'] = $target;
@@ -370,7 +370,7 @@ public function edit(LanguageInterface $language, RouteMatchInterface $route_mat
     //   See https://www.drupal.org/node/2006348.
     $operation = 'default';
 
-    $form_state_additions = array();
+    $form_state_additions = [];
     $form_state_additions['langcode'] = $language->getId();
     $form_state_additions['content_translation']['translation_form'] = TRUE;
 
diff --git a/core/modules/content_translation/src/FieldTranslationSynchronizer.php b/core/modules/content_translation/src/FieldTranslationSynchronizer.php
index 8f7584d8b62c50f48f3eede37d10b1fe08d7a892..13b805df8ac2c8c097381647b10b39b85718252a 100644
--- a/core/modules/content_translation/src/FieldTranslationSynchronizer.php
+++ b/core/modules/content_translation/src/FieldTranslationSynchronizer.php
@@ -73,14 +73,14 @@ public function synchronizeFields(ContentEntityInterface $entity, $sync_langcode
           }
         }
         if (!empty($groups)) {
-          $columns = array();
+          $columns = [];
           foreach ($groups as $group) {
             $info = $column_groups[$group];
             // A missing 'columns' key indicates we have a single-column group.
-            $columns = array_merge($columns, isset($info['columns']) ? $info['columns'] : array($group));
+            $columns = array_merge($columns, isset($info['columns']) ? $info['columns'] : [$group]);
           }
           if (!empty($columns)) {
-            $values = array();
+            $values = [];
             foreach ($translations as $langcode => $language) {
               $values[$langcode] = $entity->getTranslation($langcode)->get($field_name)->getValue();
             }
@@ -108,18 +108,18 @@ public function synchronizeItems(array &$values, array $unchanged_items, $sync_l
     $source_items = $values[$sync_langcode];
 
     // Make sure we can detect any change in the source items.
-    $change_map = array();
+    $change_map = [];
 
     // By picking the maximum size between updated and unchanged items, we make
     // sure to process also removed items.
-    $total = max(array(count($source_items), count($unchanged_items)));
+    $total = max([count($source_items), count($unchanged_items)]);
 
     // As a first step we build a map of the deltas corresponding to the column
     // values to be synchronized. Recording both the old values and the new
     // values will allow us to detect any change in the order of the new items
     // for each column.
     for ($delta = 0; $delta < $total; $delta++) {
-      foreach (array('old' => $unchanged_items, 'new' => $source_items) as $key => $items) {
+      foreach (['old' => $unchanged_items, 'new' => $source_items] as $key => $items) {
         if ($item_id = $this->itemHash($items, $delta, $columns)) {
           $change_map[$item_id][$key][] = $delta;
         }
@@ -132,7 +132,7 @@ public function synchronizeItems(array &$values, array $unchanged_items, $sync_l
 
     // Reset field values so that no spurious one is stored. Source values must
     // be preserved in any case.
-    $values = array($sync_langcode => $source_items);
+    $values = [$sync_langcode => $source_items];
 
     // Update field translations.
     foreach ($translations as $langcode) {
@@ -211,7 +211,7 @@ public function synchronizeItems(array &$values, array $unchanged_items, $sync_l
    *   A hash code that can be used to identify the item.
    */
   protected function itemHash(array $items, $delta, array $columns) {
-    $values = array();
+    $values = [];
 
     if (isset($items[$delta])) {
       foreach ($columns as $column) {
diff --git a/core/modules/content_translation/src/Plugin/Derivative/ContentTranslationLocalTasks.php b/core/modules/content_translation/src/Plugin/Derivative/ContentTranslationLocalTasks.php
index 84e12637048be7d9c279fa39c3885eb883f4f215..e364de91f641aa8172895c7e2a266289814c22c5 100644
--- a/core/modules/content_translation/src/Plugin/Derivative/ContentTranslationLocalTasks.php
+++ b/core/modules/content_translation/src/Plugin/Derivative/ContentTranslationLocalTasks.php
@@ -66,12 +66,12 @@ public function getDerivativeDefinitions($base_plugin_definition) {
       $translation_route_name = "entity.$entity_type_id.content_translation_overview";
 
       $base_route_name = "entity.$entity_type_id.canonical";
-      $this->derivatives[$translation_route_name] = array(
+      $this->derivatives[$translation_route_name] = [
         'entity_type' => $entity_type_id,
         'title' => $this->t('Translate'),
         'route_name' => $translation_route_name,
         'base_route' => $base_route_name,
-      ) + $base_plugin_definition;
+      ] + $base_plugin_definition;
     }
     return parent::getDerivativeDefinitions($base_plugin_definition);
   }
diff --git a/core/modules/content_translation/src/Routing/ContentTranslationRouteSubscriber.php b/core/modules/content_translation/src/Routing/ContentTranslationRouteSubscriber.php
index fb4b76117d9c691e0df3be0b4e8f2766633f08cb..6aae426abe31116bcf24c8aa7265178f3c3d0e92 100644
--- a/core/modules/content_translation/src/Routing/ContentTranslationRouteSubscriber.php
+++ b/core/modules/content_translation/src/Routing/ContentTranslationRouteSubscriber.php
@@ -58,104 +58,104 @@ protected function alterRoutes(RouteCollection $collection) {
 
       $route = new Route(
         $path,
-        array(
+        [
           '_controller' => '\Drupal\content_translation\Controller\ContentTranslationController::overview',
           'entity_type_id' => $entity_type_id,
-        ),
-        array(
+        ],
+        [
           '_entity_access' => $entity_type_id . '.view',
           '_access_content_translation_overview' => $entity_type_id,
-        ),
-        array(
-          'parameters' => array(
-            $entity_type_id => array(
+        ],
+        [
+          'parameters' => [
+            $entity_type_id => [
               'type' => 'entity:' . $entity_type_id,
-            ),
-          ),
+            ],
+          ],
           '_admin_route' => $is_admin,
-        )
+        ]
       );
       $route_name = "entity.$entity_type_id.content_translation_overview";
       $collection->add($route_name, $route);
 
       $route = new Route(
         $path . '/add/{source}/{target}',
-        array(
+        [
           '_controller' => '\Drupal\content_translation\Controller\ContentTranslationController::add',
           'source' => NULL,
           'target' => NULL,
           '_title' => 'Add',
           'entity_type_id' => $entity_type_id,
 
-        ),
-        array(
+        ],
+        [
           '_entity_access' => $entity_type_id . '.view',
           '_access_content_translation_manage' => 'create',
-        ),
-        array(
-          'parameters' => array(
-            'source' => array(
+        ],
+        [
+          'parameters' => [
+            'source' => [
               'type' => 'language',
-            ),
-            'target' => array(
+            ],
+            'target' => [
               'type' => 'language',
-            ),
-            $entity_type_id => array(
+            ],
+            $entity_type_id => [
               'type' => 'entity:' . $entity_type_id,
-            ),
-          ),
+            ],
+          ],
           '_admin_route' => $is_admin,
-        )
+        ]
       );
       $collection->add("entity.$entity_type_id.content_translation_add", $route);
 
       $route = new Route(
         $path . '/edit/{language}',
-        array(
+        [
           '_controller' => '\Drupal\content_translation\Controller\ContentTranslationController::edit',
           'language' => NULL,
           '_title' => 'Edit',
           'entity_type_id' => $entity_type_id,
-        ),
-        array(
+        ],
+        [
           '_access_content_translation_manage' => 'update',
-        ),
-        array(
-          'parameters' => array(
-            'language' => array(
+        ],
+        [
+          'parameters' => [
+            'language' => [
               'type' => 'language',
-            ),
-            $entity_type_id => array(
+            ],
+            $entity_type_id => [
               'type' => 'entity:' . $entity_type_id,
-            ),
-          ),
+            ],
+          ],
           '_admin_route' => $is_admin,
-        )
+        ]
       );
       $collection->add("entity.$entity_type_id.content_translation_edit", $route);
 
       $route = new Route(
         $path . '/delete/{language}',
-        array(
+        [
           '_entity_form' => $entity_type_id . '.content_translation_deletion',
           'language' => NULL,
           '_title' => 'Delete',
           'entity_type_id' => $entity_type_id,
-        ),
-        array(
+        ],
+        [
           '_access_content_translation_manage' => 'delete',
-        ),
-        array(
-          'parameters' => array(
-            'language' => array(
+        ],
+        [
+          'parameters' => [
+            'language' => [
               'type' => 'language',
-            ),
-            $entity_type_id => array(
+            ],
+            $entity_type_id => [
               'type' => 'entity:' . $entity_type_id,
-            ),
-          ),
+            ],
+          ],
           '_admin_route' => $is_admin,
-        )
+        ]
       );
       $collection->add("entity.$entity_type_id.content_translation_delete", $route);
     }
@@ -168,7 +168,7 @@ public static function getSubscribedEvents() {
     $events = parent::getSubscribedEvents();
     // Should run after AdminRouteSubscriber so the routes can inherit admin
     // status of the edit routes on entities. Therefore priority -210.
-    $events[RoutingEvents::ALTER] = array('onAlterRoutes', -210);
+    $events[RoutingEvents::ALTER] = ['onAlterRoutes', -210];
     return $events;
   }
 
diff --git a/core/modules/content_translation/src/Tests/ContentTestTranslationUITest.php b/core/modules/content_translation/src/Tests/ContentTestTranslationUITest.php
index e94802aa1cd969c30945b668e94c654a93186386..1688f75fd6b0bfa7499305f746e63d87f0959379 100644
--- a/core/modules/content_translation/src/Tests/ContentTestTranslationUITest.php
+++ b/core/modules/content_translation/src/Tests/ContentTestTranslationUITest.php
@@ -19,7 +19,7 @@ class ContentTestTranslationUITest extends ContentTranslationUITestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'entity_test');
+  public static $modules = ['language', 'content_translation', 'entity_test'];
 
   /**
    * {@inheritdoc}
@@ -34,7 +34,7 @@ protected function setUp() {
    * {@inheritdoc}
    */
   protected function getTranslatorPermissions() {
-    return array_merge(parent::getTranslatorPermissions(), array('administer entity_test content', 'view test entity'));
+    return array_merge(parent::getTranslatorPermissions(), ['administer entity_test content', 'view test entity']);
   }
 
 }
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationContextualLinksTest.php b/core/modules/content_translation/src/Tests/ContentTranslationContextualLinksTest.php
index efbd3c11fd4d07612f3b2c9ba9ed371d4a4f601d..080ffb954932a59f244231e44696ae17e7ad9b8d 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationContextualLinksTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationContextualLinksTest.php
@@ -48,7 +48,7 @@ class ContentTranslationContextualLinksTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('content_translation', 'contextual', 'node');
+  public static $modules = ['content_translation', 'contextual', 'node'];
 
   /**
    * The profile to install as a basis for testing.
@@ -60,20 +60,20 @@ class ContentTranslationContextualLinksTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
     // Set up an additional language.
-    $this->langcodes = array(\Drupal::languageManager()->getDefaultLanguage()->getId(), 'es');
+    $this->langcodes = [\Drupal::languageManager()->getDefaultLanguage()->getId(), 'es'];
     ConfigurableLanguage::createFromLangcode('es')->save();
 
     // Create a content type.
     $this->bundle = $this->randomMachineName();
-    $this->contentType = $this->drupalCreateContentType(array('type' => $this->bundle));
+    $this->contentType = $this->drupalCreateContentType(['type' => $this->bundle]);
 
     // Add a field to the content type. The field is not yet translatable.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_test_text',
       'entity_type' => 'node',
       'type' => 'text',
       'cardinality' => 1,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'node',
       'field_name' => 'field_test_text',
@@ -81,19 +81,19 @@ protected function setUp() {
       'label' => 'Test text-field',
     ])->save();
     entity_get_form_display('node', $this->bundle, 'default')
-      ->setComponent('field_test_text', array(
+      ->setComponent('field_test_text', [
         'type' => 'text_textfield',
         'weight' => 0,
-      ))
+      ])
       ->save();
 
     // Create a translator user.
-    $permissions = array(
+    $permissions = [
       'access contextual links',
       'administer nodes',
       "edit any $this->bundle content",
       'translate any entity',
-    );
+    ];
     $this->translator = $this->drupalCreateUser($permissions);
   }
 
@@ -103,18 +103,18 @@ protected function setUp() {
   public function testContentTranslationContextualLinks() {
     // Create a node.
     $title = $this->randomString();
-    $this->drupalCreateNode(array('type' => $this->bundle, 'title' => $title, 'langcode' => 'en'));
+    $this->drupalCreateNode(['type' => $this->bundle, 'title' => $title, 'langcode' => 'en']);
     $node = $this->drupalGetNodeByTitle($title);
 
     // Use a UI form submission to make the node type and field translatable.
     // This tests that caches are properly invalidated.
     $this->drupalLogin($this->rootUser);
-    $edit = array(
+    $edit = [
       'entity_types[node]' => TRUE,
       'settings[node][' . $this->bundle . '][settings][language][language_alterable]' => TRUE,
       'settings[node][' . $this->bundle . '][translatable]' => TRUE,
       'settings[node][' . $this->bundle . '][fields][field_test_text]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
     $this->drupalLogout();
 
@@ -122,7 +122,7 @@ public function testContentTranslationContextualLinks() {
     $this->drupalLogin($this->translator);
     $translate_link = 'node/' . $node->id() . '/translations';
 
-    $response = $this->renderContextualLinks(array('node:node=1:'), 'node/' . $node->id());
+    $response = $this->renderContextualLinks(['node:node=1:'], 'node/' . $node->id());
     $this->assertResponse(200);
     $json = Json::decode($response);
     $this->setRawContent($json['node:node=1:']);
@@ -130,7 +130,7 @@ public function testContentTranslationContextualLinks() {
 
     // Check that the link leads to the translate page.
     $this->drupalGet($translate_link);
-    $this->assertRaw(t('Translations of %label', array('%label' => $node->label())), 'The contextual link leads to the translate page.');
+    $this->assertRaw(t('Translations of %label', ['%label' => $node->label()]), 'The contextual link leads to the translate page.');
   }
 
   /**
@@ -148,7 +148,7 @@ public function testContentTranslationContextualLinks() {
    */
   protected function renderContextualLinks($ids, $current_path) {
     // Build POST values.
-    $post = array();
+    $post = [];
     for ($i = 0; $i < count($ids); $i++) {
       $post['ids[' . $i . ']'] = $ids[$i];
     }
@@ -163,15 +163,15 @@ protected function renderContextualLinks($ids, $current_path) {
     $post = implode('&', $post);
 
     // Perform HTTP request.
-    return $this->curlExec(array(
-      CURLOPT_URL => \Drupal::url('contextual.render', array(), array('absolute' => TRUE, 'query' => array('destination' => $current_path))),
+    return $this->curlExec([
+      CURLOPT_URL => \Drupal::url('contextual.render', [], ['absolute' => TRUE, 'query' => ['destination' => $current_path]]),
       CURLOPT_POST => TRUE,
       CURLOPT_POSTFIELDS => $post,
-      CURLOPT_HTTPHEADER => array(
+      CURLOPT_HTTPHEADER => [
         'Accept: application/json',
         'Content-Type: application/x-www-form-urlencoded',
-      ),
-    ));
+      ],
+    ]);
   }
 
 }
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationEnableTest.php b/core/modules/content_translation/src/Tests/ContentTranslationEnableTest.php
index ded8c1bee4ef5c2fc830ef4af5b25b3da2790b18..11c816c1d724cb4ca87a786bb4180beeb0d16c38 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationEnableTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationEnableTest.php
@@ -58,11 +58,11 @@ public function testEnable() {
 
     // Create a node type and check the content translation settings are now
     // available for nodes.
-    $edit = array(
+    $edit = [
       'name' => 'foo',
       'title_label' => 'title for foo',
       'type' => 'foo',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/add', $edit, t('Save content type'));
     $this->drupalGet('admin/config/regional/content-language');
     $this->assertRaw('entity_types[node]');
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationLanguageChangeTest.php b/core/modules/content_translation/src/Tests/ContentTranslationLanguageChangeTest.php
index fea0e140eec8928be2b0eb1b439e01073e8fada8..bb9b2235ebd87f8a089d126d1fbc0a197177f55a 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationLanguageChangeTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationLanguageChangeTest.php
@@ -29,7 +29,7 @@ protected function setUp() {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
     $this->drupalPlaceBlock('local_tasks_block');
-    $user = $this->drupalCreateUser(array(
+    $user = $this->drupalCreateUser([
       'administer site configuration',
       'administer nodes',
       'create article content',
@@ -41,7 +41,7 @@ protected function setUp() {
       'administer languages',
       'administer content types',
       'administer node fields',
-    ));
+    ]);
     $this->drupalLogin($user);
 
     // Enable translation for article.
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php b/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
index d7490c0471a21a6b5b52e1fc20cfda7dc29bdbc3..aed653b9036c0b5ceb9e925a969dc3f67c941888 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
@@ -24,19 +24,19 @@ class ContentTranslationSettingsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'node', 'comment', 'field_ui', 'entity_test');
+  public static $modules = ['language', 'content_translation', 'node', 'comment', 'field_ui', 'entity_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Set up two content types to test fields shared between different
     // bundles.
-    $this->drupalCreateContentType(array('type' => 'article'));
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'article']);
+    $this->drupalCreateContentType(['type' => 'page']);
     $this->addDefaultCommentField('node', 'article', 'comment_article', CommentItemInterface::OPEN, 'comment_article');
     $this->addDefaultCommentField('node', 'page', 'comment_page');
 
-    $admin_user = $this->drupalCreateUser(array('access administration pages', 'administer languages', 'administer content translation', 'administer content types', 'administer node fields', 'administer comment fields', 'administer comments', 'administer comment types', 'administer account settings'));
+    $admin_user = $this->drupalCreateUser(['access administration pages', 'administer languages', 'administer content translation', 'administer content types', 'administer node fields', 'administer comment fields', 'administer comments', 'administer comment types', 'administer account settings']);
     $this->drupalLogin($admin_user);
   }
 
@@ -50,17 +50,17 @@ function testSettingsUI() {
     $this->assertText('Configure language and translation support for content.');
     // Test that the translation settings are ignored if the bundle is marked
     // translatable but the entity type is not.
-    $edit = array('settings[comment][comment_article][translatable]' => TRUE);
+    $edit = ['settings[comment][comment_article][translatable]' => TRUE];
     $this->assertSettings('comment', NULL, FALSE, $edit);
 
     // Test that the translation settings are ignored if only a field is marked
     // as translatable and not the related entity type and bundle.
-    $edit = array('settings[comment][comment_article][fields][comment_body]' => TRUE);
+    $edit = ['settings[comment][comment_article][fields][comment_body]' => TRUE];
     $this->assertSettings('comment', NULL, FALSE, $edit);
 
     // Test that the translation settings are not stored if an entity type and
     // bundle are marked as translatable but no field is.
-    $edit = array(
+    $edit = [
       'entity_types[comment]' => TRUE,
       'settings[comment][comment_article][translatable]' => TRUE,
       // Base fields are translatable by default.
@@ -73,26 +73,26 @@ function testSettingsUI() {
       'settings[comment][comment_article][fields][status]' => FALSE,
       'settings[comment][comment_article][fields][subject]' => FALSE,
       'settings[comment][comment_article][fields][uid]' => FALSE,
-    );
+    ];
     $this->assertSettings('comment', 'comment_article', FALSE, $edit);
     $xpath_err = '//div[contains(@class, "error")]';
     $this->assertTrue($this->xpath($xpath_err), 'Enabling translation only for entity bundles generates a form error.');
 
     // Test that the translation settings are not stored if a non-configurable
     // language is set as default and the language selector is hidden.
-    $edit = array(
+    $edit = [
       'entity_types[comment]' => TRUE,
       'settings[comment][comment_article][settings][language][langcode]' => Language::LANGCODE_NOT_SPECIFIED,
       'settings[comment][comment_article][settings][language][language_alterable]' => FALSE,
       'settings[comment][comment_article][translatable]' => TRUE,
       'settings[comment][comment_article][fields][comment_body]' => TRUE,
-    );
+    ];
     $this->assertSettings('comment', 'comment_article', FALSE, $edit);
     $this->assertTrue($this->xpath($xpath_err), 'Enabling translation with a fixed non-configurable language generates a form error.');
 
     // Test that a field shared among different bundles can be enabled without
     // needing to make all the related bundles translatable.
-    $edit = array(
+    $edit = [
       'entity_types[comment]' => TRUE,
       'settings[comment][comment_article][settings][language][langcode]' => 'current_interface',
       'settings[comment][comment_article][settings][language][language_alterable]' => TRUE,
@@ -101,7 +101,7 @@ function testSettingsUI() {
       // Override both comment subject fields to untranslatable.
       'settings[comment][comment_article][fields][subject]' => FALSE,
       'settings[comment][comment][fields][subject]' => FALSE,
-    );
+    ];
     $this->assertSettings('comment', 'comment_article', TRUE, $edit);
     $definition = $this->entityManager()->getFieldDefinitions('comment', 'comment_article')['comment_body'];
     $this->assertTrue($definition->isTranslatable(), 'Article comment body is translatable.');
@@ -114,12 +114,12 @@ function testSettingsUI() {
     $this->assertFalse($definition->isTranslatable(), 'Page comment subject is not translatable.');
 
     // Test that translation can be enabled for base fields.
-    $edit = array(
+    $edit = [
       'entity_types[entity_test_mul]' => TRUE,
       'settings[entity_test_mul][entity_test_mul][translatable]' => TRUE,
       'settings[entity_test_mul][entity_test_mul][fields][name]' => TRUE,
       'settings[entity_test_mul][entity_test_mul][fields][user_id]' => FALSE,
-    );
+    ];
     $this->assertSettings('entity_test_mul', 'entity_test_mul', TRUE, $edit);
     $field_override = BaseFieldOverride::loadByName('entity_test_mul', 'entity_test_mul', 'name');
     $this->assertTrue($field_override->isTranslatable(), 'Base fields can be overridden with a base field bundle override entity.');
@@ -137,9 +137,9 @@ function testSettingsUI() {
     $this->assertFieldChecked('edit-language-configuration-content-translation');
 
     // Verify that translation may be enabled for the article content type.
-    $edit = array(
+    $edit = [
       'language_configuration[content_translation]' => TRUE,
-    );
+    ];
     // Make sure the checkbox is available and not checked by default.
     $this->drupalGet('admin/structure/types/manage/article');
     $this->assertField('language_configuration[content_translation]');
@@ -149,18 +149,18 @@ function testSettingsUI() {
     $this->assertFieldChecked('edit-language-configuration-content-translation');
 
     // Test that the title field of nodes is available in the settings form.
-    $edit = array(
+    $edit = [
       'entity_types[node]' => TRUE,
       'settings[node][article][settings][language][langcode]' => 'current_interface',
       'settings[node][article][settings][language][language_alterable]' => TRUE,
       'settings[node][article][translatable]' => TRUE,
       'settings[node][article][fields][title]' => TRUE
-    );
+    ];
     $this->assertSettings('node', NULL, TRUE, $edit);
 
-    foreach (array(TRUE, FALSE) as $translatable) {
+    foreach ([TRUE, FALSE] as $translatable) {
       // Test that configurable field translatability is correctly switched.
-      $edit = array('settings[node][article][fields][body]' => $translatable);
+      $edit = ['settings[node][article][fields][body]' => $translatable];
       $this->assertSettings('node', 'article', TRUE, $edit);
       $field = FieldConfig::loadByName('node', 'article', 'body');
       $definitions = \Drupal::entityManager()->getFieldDefinitions('node', 'article');
@@ -169,7 +169,7 @@ function testSettingsUI() {
 
       // Test that also the Field UI form behaves correctly.
       $translatable = !$translatable;
-      $edit = array('translatable' => $translatable);
+      $edit = ['translatable' => $translatable];
       $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.body', $edit, t('Save settings'));
       \Drupal::entityManager()->clearCachedFieldDefinitions();
       $field = FieldConfig::loadByName('node', 'article', 'body');
@@ -182,14 +182,14 @@ function testSettingsUI() {
     // lists, such as in Views UI.
     $this->drupalGet('admin/config/regional/content-language');
 
-    $expected_elements = array(
+    $expected_elements = [
       'site_default',
       'current_interface',
       'authors_default',
       'en',
       'und',
       'zxx',
-    );
+    ];
     $elements = $this->xpath('//select[@id="edit-settings-node-article-settings-language-langcode"]/option');
     // Compare values inside the option elements with expected values.
     for ($i = 0; $i < count($elements); $i++) {
@@ -206,15 +206,15 @@ function testAccountLanguageSettingsUI() {
     $this->assertField('language[content_translation]');
     $this->assertNoFieldChecked('edit-language-content-translation');
 
-    $edit = array(
+    $edit = [
       'language[content_translation]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/people/accounts', $edit, t('Save configuration'));
     $this->drupalGet('admin/config/people/accounts');
     $this->assertFieldChecked('edit-language-content-translation');
 
     // Make sure account settings can be saved.
-    $this->drupalPostForm('admin/config/people/accounts', array('anonymous' => 'Save me please!'), 'Save configuration');
+    $this->drupalPostForm('admin/config/people/accounts', ['anonymous' => 'Save me please!'], 'Save configuration');
     $this->assertFieldByName('anonymous', 'Save me please!', 'Anonymous name has been changed.');
     $this->assertText('The configuration options have been saved.');
   }
@@ -236,7 +236,7 @@ function testAccountLanguageSettingsUI() {
    */
   protected function assertSettings($entity_type, $bundle, $enabled, $edit) {
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
-    $args = array('@entity_type' => $entity_type, '@bundle' => $bundle, '@enabled' => $enabled ? 'enabled' : 'disabled');
+    $args = ['@entity_type' => $entity_type, '@bundle' => $bundle, '@enabled' => $enabled ? 'enabled' : 'disabled'];
     $message = format_string('Translation for entity @entity_type (@bundle) is @enabled.', $args);
     \Drupal::entityManager()->clearCachedDefinitions();
     return $this->assertEqual(\Drupal::service('content_translation.manager')->isEnabled($entity_type, $bundle), $enabled, $message);
@@ -249,11 +249,11 @@ function testFieldTranslatableSettingsUI() {
     // At least one field needs to be translatable to enable article for
     // translation. Create an extra field to be used for this purpose. We use
     // the UI to test our form alterations.
-    $edit = array(
+    $edit = [
       'new_storage_type' => 'text',
       'label' => 'Test',
       'field_name' => 'article_text',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article/fields/add-field', $edit, 'Save and continue');
 
     // Tests that field doesn't have translatable setting if bundle is not
@@ -265,12 +265,12 @@ function testFieldTranslatableSettingsUI() {
 
     // Tests that field has translatable setting if bundle is translatable.
     // Note: this field is not translatable when enable bundle translatability.
-    $edit = array(
+    $edit = [
       'entity_types[node]' => TRUE,
       'settings[node][article][settings][language][language_alterable]' => TRUE,
       'settings[node][article][translatable]' => TRUE,
       'settings[node][article][fields][field_article_text]' => TRUE,
-    );
+    ];
     $this->assertSettings('node', 'article', TRUE, $edit);
     $this->drupalGet($path);
     $this->assertFieldByXPath('//input[@id="edit-translatable" and not(@disabled) and @checked="checked"]');
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationSyncImageTest.php b/core/modules/content_translation/src/Tests/ContentTranslationSyncImageTest.php
index 5f881a7105488030b34506188d26b3c5d93b76ad..10b3c5e0b63ca86572cce47e5c4b2fd361c67609 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationSyncImageTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationSyncImageTest.php
@@ -33,7 +33,7 @@ class ContentTranslationSyncImageTest extends ContentTranslationTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'entity_test', 'image', 'field_ui');
+  public static $modules = ['language', 'content_translation', 'entity_test', 'image', 'field_ui'];
 
   protected function setUp() {
     parent::setUp();
@@ -47,27 +47,27 @@ protected function setupTestFields() {
     $this->fieldName = 'field_test_et_ui_image';
     $this->cardinality = 3;
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => $this->entityTypeId,
       'type' => 'image',
       'cardinality' => $this->cardinality,
-    ))->save();
+    ])->save();
 
     FieldConfig::create([
       'entity_type' => $this->entityTypeId,
       'field_name' => $this->fieldName,
       'bundle' => $this->entityTypeId,
       'label' => 'Test translatable image field',
-      'third_party_settings' => array(
-        'content_translation' => array(
-          'translation_sync' => array(
+      'third_party_settings' => [
+        'content_translation' => [
+          'translation_sync' => [
             'file' => FALSE,
             'alt' => 'alt',
             'title' => 'title',
-          ),
-        ),
-      ),
+          ],
+        ],
+      ],
     ])->save();
   }
 
@@ -76,7 +76,7 @@ protected function setupTestFields() {
    */
   protected function getEditorPermissions() {
     // Every entity-type-specific test needs to define these.
-    return array('administer entity_test_mul fields', 'administer languages', 'administer content translation');
+    return ['administer entity_test_mul fields', 'administer languages', 'administer content translation'];
   }
 
   /**
@@ -88,10 +88,10 @@ function testImageFieldSync() {
     $this->drupalGet('entity_test_mul/structure/' . $this->entityTypeId . '/fields/' . $this->entityTypeId . '.' . $this->entityTypeId . '.' . $this->fieldName);
     $this->assertFieldChecked('edit-third-party-settings-content-translation-translation-sync-alt');
     $this->assertFieldChecked('edit-third-party-settings-content-translation-translation-sync-title');
-    $edit = array(
+    $edit = [
       'third_party_settings[content_translation][translation_sync][alt]' => FALSE,
       'third_party_settings[content_translation][translation_sync][title]' => FALSE,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
 
     // Check that the content translation settings page reflects the changes
@@ -99,11 +99,11 @@ function testImageFieldSync() {
     $this->drupalGet('admin/config/regional/content-language');
     $this->assertNoFieldChecked('edit-settings-entity-test-mul-entity-test-mul-columns-field-test-et-ui-image-alt');
     $this->assertNoFieldChecked('edit-settings-entity-test-mul-entity-test-mul-columns-field-test-et-ui-image-title');
-    $edit = array(
+    $edit = [
       'settings[entity_test_mul][entity_test_mul][fields][field_test_et_ui_image]' => TRUE,
       'settings[entity_test_mul][entity_test_mul][columns][field_test_et_ui_image][alt]' => TRUE,
       'settings[entity_test_mul][entity_test_mul][columns][field_test_et_ui_image][title]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
     $errors = $this->xpath('//div[contains(@class, "messages--error")]');
     $this->assertFalse($errors, 'Settings correctly stored.');
@@ -115,26 +115,26 @@ function testImageFieldSync() {
     $langcode = $this->langcodes[1];
 
     // Populate the test entity with some random initial values.
-    $values = array(
+    $values = [
       'name' => $this->randomMachineName(),
       'user_id' => mt_rand(1, 128),
       'langcode' => $default_langcode,
-    );
+    ];
     $entity = entity_create($this->entityTypeId, $values);
 
     // Create some file entities from the generated test files and store them.
-    $values = array();
+    $values = [];
     for ($delta = 0; $delta < $this->cardinality; $delta++) {
       // For the default language use the same order for files and field items.
       $index = $delta;
 
       // Create the file entity for the image being processed and record its
       // identifier.
-      $field_values = array(
+      $field_values = [
         'uri' => $this->files[$index]->uri,
         'uid' => \Drupal::currentUser()->id(),
         'status' => FILE_STATUS_PERMANENT,
-      );
+      ];
       $file = File::create($field_values);
       $file->save();
       $fid = $file->id();
@@ -142,11 +142,11 @@ function testImageFieldSync() {
 
       // Generate the item for the current image file entity and attach it to
       // the entity.
-      $item = array(
+      $item = [
         'target_id' => $fid,
         'alt' => $default_langcode . '_' . $fid . '_' . $this->randomMachineName(),
         'title' => $default_langcode . '_' . $fid . '_' . $this->randomMachineName(),
-      );
+      ];
       $entity->{$this->fieldName}[] = $item;
 
       // Store the generated values keying them by fid for easier lookup.
@@ -168,11 +168,11 @@ function testImageFieldSync() {
       // Generate the item for the current image file entity and attach it to
       // the entity.
       $fid = $this->files[$index]->fid;
-      $item = array(
+      $item = [
         'target_id' => $fid,
         'alt' => $langcode . '_' . $fid . '_' . $this->randomMachineName(),
         'title' => $langcode . '_' . $fid . '_' . $this->randomMachineName(),
-      );
+      ];
       $translation->{$this->fieldName}[] = $item;
 
       // Again store the generated values keying them by fid for easier lookup.
@@ -191,25 +191,25 @@ function testImageFieldSync() {
 
     // Check that fids have been synchronized and translatable column values
     // have been retained.
-    $fids = array();
+    $fids = [];
     foreach ($entity->{$this->fieldName} as $delta => $item) {
       $value = $values[$default_langcode][$item->target_id];
       $source_item = $translation->{$this->fieldName}->get($delta);
       $assert = $item->target_id == $source_item->target_id && $item->alt == $value['alt'] && $item->title == $value['title'];
-      $this->assertTrue($assert, format_string('Field item @fid has been successfully synchronized.', array('@fid' => $item->target_id)));
+      $this->assertTrue($assert, format_string('Field item @fid has been successfully synchronized.', ['@fid' => $item->target_id]));
       $fids[$item->target_id] = TRUE;
     }
 
     // Check that the dropped value is the right one.
     $removed_fid = $this->files[0]->fid;
-    $this->assertTrue(!isset($fids[$removed_fid]), format_string('Field item @fid has been correctly removed.', array('@fid' => $removed_fid)));
+    $this->assertTrue(!isset($fids[$removed_fid]), format_string('Field item @fid has been correctly removed.', ['@fid' => $removed_fid]));
 
     // Add back an item for the dropped value and perform synchronization again.
-    $values[$langcode][$removed_fid] = array(
+    $values[$langcode][$removed_fid] = [
       'target_id' => $removed_fid,
       'alt' => $langcode . '_' . $removed_fid . '_' . $this->randomMachineName(),
       'title' => $langcode . '_' . $removed_fid . '_' . $this->randomMachineName(),
-    );
+    ];
     $translation->{$this->fieldName}->setValue(array_values($values[$langcode]));
     $entity = $this->saveEntity($translation);
     $translation = $entity->getTranslation($langcode);
@@ -226,7 +226,7 @@ function testImageFieldSync() {
       $value = $values[$fid_langcode][$item->target_id];
       $source_item = $translation->{$this->fieldName}->get($delta);
       $assert = $item->target_id == $source_item->target_id && $item->alt == $value['alt'] && $item->title == $value['title'];
-      $this->assertTrue($assert, format_string('Field item @fid has been successfully synchronized.', array('@fid' => $item->target_id)));
+      $this->assertTrue($assert, format_string('Field item @fid has been successfully synchronized.', ['@fid' => $item->target_id]));
     }
   }
 
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationTestBase.php b/core/modules/content_translation/src/Tests/ContentTranslationTestBase.php
index 96921c0190af3815c406d7cfd861bc5f086fd43c..a84bb73b8ef183785f5ec2dc3436ce97187c5cb4 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationTestBase.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationTestBase.php
@@ -21,7 +21,7 @@ abstract class ContentTranslationTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('text');
+  public static $modules = ['text'];
 
   /**
    * The entity type being tested.
@@ -105,7 +105,7 @@ protected function setUp() {
    * Adds additional languages.
    */
   protected function setupLanguages() {
-    $this->langcodes = array('it', 'fr');
+    $this->langcodes = ['it', 'fr'];
     foreach ($this->langcodes as $langcode) {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
@@ -116,7 +116,7 @@ protected function setupLanguages() {
    * Returns an array of permissions needed for the translator.
    */
   protected function getTranslatorPermissions() {
-    return array_filter(array($this->getTranslatePermission(), 'create content translations', 'update content translations', 'delete content translations'));
+    return array_filter([$this->getTranslatePermission(), 'create content translations', 'update content translations', 'delete content translations']);
   }
 
   /**
@@ -134,14 +134,14 @@ protected function getTranslatePermission() {
    */
   protected function getEditorPermissions() {
     // Every entity-type-specific test needs to define these.
-    return array();
+    return [];
   }
 
   /**
    * Returns an array of permissions needed for the administrator.
    */
   protected function getAdministratorPermissions() {
-    return array_merge($this->getEditorPermissions(), $this->getTranslatorPermissions(), array('administer content translation'));
+    return array_merge($this->getEditorPermissions(), $this->getTranslatorPermissions(), ['administer content translation']);
   }
 
   /**
@@ -183,12 +183,12 @@ protected function setupTestFields() {
     if (empty($this->fieldName)) {
       $this->fieldName = 'field_test_et_ui_test';
     }
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'type' => 'string',
       'entity_type' => $this->entityTypeId,
       'cardinality' => 1,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => $this->entityTypeId,
       'field_name' => $this->fieldName,
@@ -196,10 +196,10 @@ protected function setupTestFields() {
       'label' => 'Test translatable text-field',
     ])->save();
     entity_get_form_display($this->entityTypeId, $this->bundle, 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'string_textfield',
         'weight' => 0,
-      ))
+      ])
       ->save();
   }
 
@@ -228,7 +228,7 @@ protected function createEntity($values, $langcode, $bundle_name = NULL) {
     if (!($controller instanceof SqlContentEntityStorage)) {
       foreach ($values as $property => $value) {
         if (is_array($value)) {
-          $entity_values[$property] = array($langcode => $value);
+          $entity_values[$property] = [$langcode => $value];
         }
       }
     }
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationUITestBase.php b/core/modules/content_translation/src/Tests/ContentTranslationUITestBase.php
index e5b14c2f45eddd555ea6ac159c73745112131766..c6d1a5d4453a8b15c70e2bb5b4cabf90fba4d8d2 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationUITestBase.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationUITestBase.php
@@ -100,7 +100,7 @@ protected function doTestBasicTranslation() {
     foreach ($values[$default_langcode] as $property => $value) {
       $stored_value = $this->getValue($translation, $property, $default_langcode);
       $value = is_array($value) ? $value[0]['value'] : $value;
-      $message = format_string('@property correctly stored in the default language.', array('@property' => $property));
+      $message = format_string('@property correctly stored in the default language.', ['@property' => $property]);
       $this->assertEqual($stored_value, $value, $message);
     }
 
@@ -114,7 +114,7 @@ protected function doTestBasicTranslation() {
       $entity->getEntityTypeId() => $entity->id(),
       'source' => $default_langcode,
       'target' => $langcode
-    ], array('language' => $language));
+    ], ['language' => $language]);
     $this->drupalPostForm($add_url, $this->getEditValues($values, $langcode), $this->getFormSubmitActionForNewTranslation($entity, $langcode));
 
     // Assert that HTML is escaped in "all languages" in UI after SafeMarkup
@@ -141,11 +141,11 @@ protected function doTestBasicTranslation() {
     $author_field_name = $entity->hasField('content_translation_uid') ? 'content_translation_uid' : 'uid';
     if ($entity->getFieldDefinition($author_field_name)->isTranslatable()) {
       $this->assertEqual($metadata_target_translation->getAuthor()->id(), $this->translator->id(),
-        SafeMarkup::format('Author of the target translation @langcode correctly stored for translatable owner field.', array('@langcode' => $langcode)));
+        SafeMarkup::format('Author of the target translation @langcode correctly stored for translatable owner field.', ['@langcode' => $langcode]));
 
       $this->assertNotEqual($metadata_target_translation->getAuthor()->id(), $metadata_source_translation->getAuthor()->id(),
         SafeMarkup::format('Author of the target translation @target different from the author of the source translation @source for translatable owner field.',
-          array('@target' => $langcode, '@source' => $default_langcode)));
+          ['@target' => $langcode, '@source' => $default_langcode]));
     }
     else {
       $this->assertEqual($metadata_target_translation->getAuthor()->id(), $this->editor->id(), 'Author of the entity remained untouched after translation for non translatable owner field.');
@@ -155,7 +155,7 @@ protected function doTestBasicTranslation() {
     if ($entity->getFieldDefinition($created_field_name)->isTranslatable()) {
       $this->assertTrue($metadata_target_translation->getCreatedTime() > $metadata_source_translation->getCreatedTime(),
         SafeMarkup::format('Translation creation timestamp of the target translation @target is newer than the creation timestamp of the source translation @source for translatable created field.',
-          array('@target' => $langcode, '@source' => $default_langcode)));
+          ['@target' => $langcode, '@source' => $default_langcode]));
     }
     else {
       $this->assertEqual($metadata_target_translation->getCreatedTime(), $metadata_source_translation->getCreatedTime(), 'Creation timestamp of the entity remained untouched after translation for non translatable created field.');
@@ -173,13 +173,13 @@ protected function doTestBasicTranslation() {
     $langcode = 'fr';
     $language = ConfigurableLanguage::load($langcode);
     $source_langcode = 'it';
-    $edit = array('source_langcode[source]' => $source_langcode);
+    $edit = ['source_langcode[source]' => $source_langcode];
     $entity_type_id = $entity->getEntityTypeId();
     $add_url = Url::fromRoute("entity.$entity_type_id.content_translation_add", [
       $entity->getEntityTypeId() => $entity->id(),
       'source' => $default_langcode,
       'target' => $langcode
-    ], array('language' => $language));
+    ], ['language' => $language]);
     // This does not save anything, it merely reloads the form and fills in the
     // fields with the values from the different source language.
     $this->drupalPostForm($add_url, $edit, t('Change'));
@@ -187,13 +187,13 @@ protected function doTestBasicTranslation() {
 
     // Add another translation and mark the other ones as outdated.
     $values[$langcode] = $this->getNewEntityValues($langcode);
-    $edit = $this->getEditValues($values, $langcode) + array('content_translation[retranslate]' => TRUE);
+    $edit = $this->getEditValues($values, $langcode) + ['content_translation[retranslate]' => TRUE];
     $entity_type_id = $entity->getEntityTypeId();
     $add_url = Url::fromRoute("entity.$entity_type_id.content_translation_add", [
       $entity->getEntityTypeId() => $entity->id(),
       'source' => $source_langcode,
       'target' => $langcode
-    ], array('language' => $language));
+    ], ['language' => $language]);
     $this->drupalPostForm($add_url, $edit, $this->getFormSubmitActionForNewTranslation($entity, $langcode));
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
@@ -206,7 +206,7 @@ protected function doTestBasicTranslation() {
       foreach ($property_values as $property => $value) {
         $stored_value = $this->getValue($translation, $property, $langcode);
         $value = is_array($value) ? $value[0]['value'] : $value;
-        $message = format_string('%property correctly stored with language %language.', array('%property' => $property, '%language' => $langcode));
+        $message = format_string('%property correctly stored with language %language.', ['%property' => $property, '%language' => $langcode]);
         $this->assertEqual($stored_value, $value, $message);
       }
     }
@@ -226,13 +226,13 @@ protected function doTestTranslationOverview() {
 
     foreach ($this->langcodes as $langcode) {
       if ($entity->hasTranslation($langcode)) {
-        $language = new Language(array('id' => $langcode));
+        $language = new Language(['id' => $langcode]);
         $view_url = $entity->url('canonical', ['language' => $language]);
         $elements = $this->xpath('//table//a[@href=:href]', [':href' => $view_url]);
-        $this->assertEqual((string) $elements[0], $entity->getTranslation($langcode)->label(), format_string('Label correctly shown for %language translation.', array('%language' => $langcode)));
-        $edit_path = $entity->url('edit-form', array('language' => $language));
-        $elements = $this->xpath('//table//ul[@class="dropbutton"]/li/a[@href=:href]', array(':href' => $edit_path));
-        $this->assertEqual((string) $elements[0], t('Edit'), format_string('Edit link correct for %language translation.', array('%language' => $langcode)));
+        $this->assertEqual((string) $elements[0], $entity->getTranslation($langcode)->label(), format_string('Label correctly shown for %language translation.', ['%language' => $langcode]));
+        $edit_path = $entity->url('edit-form', ['language' => $language]);
+        $elements = $this->xpath('//table//ul[@class="dropbutton"]/li/a[@href=:href]', [':href' => $edit_path]);
+        $this->assertEqual((string) $elements[0], t('Edit'), format_string('Edit link correct for %language translation.', ['%language' => $langcode]));
       }
     }
   }
@@ -249,8 +249,8 @@ protected function doTestOutdatedStatus() {
     $languages = \Drupal::languageManager()->getLanguages();
 
     // Mark translations as outdated.
-    $edit = array('content_translation[retranslate]' => TRUE);
-    $edit_path = $entity->urlInfo('edit-form', array('language' => $languages[$langcode]));
+    $edit = ['content_translation[retranslate]' => TRUE];
+    $edit_path = $entity->urlInfo('edit-form', ['language' => $languages[$langcode]]);
     $this->drupalPostForm($edit_path, $edit, $this->getFormSubmitAction($entity, $langcode));
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
@@ -258,7 +258,7 @@ protected function doTestOutdatedStatus() {
     // Check that every translation has the correct "outdated" status, and that
     // the Translation fieldset is open if the translation is "outdated".
     foreach ($this->langcodes as $added_langcode) {
-      $url = $entity->urlInfo('edit-form', array('language' => ConfigurableLanguage::load($added_langcode)));
+      $url = $entity->urlInfo('edit-form', ['language' => ConfigurableLanguage::load($added_langcode)]);
       $this->drupalGet($url);
       if ($added_langcode == $langcode) {
         $this->assertFieldByXPath('//input[@name="content_translation[retranslate]"]', FALSE, 'The retranslate flag is not checked by default.');
@@ -267,7 +267,7 @@ protected function doTestOutdatedStatus() {
       else {
         $this->assertFieldByXPath('//input[@name="content_translation[outdated]"]', TRUE, 'The translate flag is checked by default.');
         $this->assertTrue($this->xpath('//details[@id="edit-content-translation" and @open="open"]'), 'The translation tab is correctly expanded when the translation is outdated.');
-        $edit = array('content_translation[outdated]' => FALSE);
+        $edit = ['content_translation[outdated]' => FALSE];
         $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $added_langcode));
         $this->drupalGet($url);
         $this->assertFieldByXPath('//input[@name="content_translation[retranslate]"]', FALSE, 'The retranslate flag is now shown.');
@@ -292,8 +292,8 @@ protected function doTestPublishedStatus() {
     // Unpublish translations.
     foreach ($this->langcodes as $index => $langcode) {
       if ($index > 0) {
-        $url = $entity->urlInfo('edit-form', array('language' => ConfigurableLanguage::load($langcode)));
-        $edit = array('content_translation[status]' => FALSE);
+        $url = $entity->urlInfo('edit-form', ['language' => ConfigurableLanguage::load($langcode)]);
+        $edit = ['content_translation[status]' => FALSE];
         $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $langcode));
         $storage = $this->container->get('entity_type.manager')
           ->getStorage($this->entityTypeId);
@@ -316,20 +316,20 @@ protected function doTestAuthoringInfo() {
       ->getStorage($this->entityTypeId);
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
-    $values = array();
+    $values = [];
 
     // Post different authoring information for each translation.
     foreach ($this->langcodes as $index => $langcode) {
       $user = $this->drupalCreateUser();
-      $values[$langcode] = array(
+      $values[$langcode] = [
         'uid' => $user->id(),
         'created' => REQUEST_TIME - mt_rand(0, 1000),
-      );
-      $edit = array(
+      ];
+      $edit = [
         'content_translation[uid]' => $user->getUsername(),
         'content_translation[created]' => format_date($values[$langcode]['created'], 'custom', 'Y-m-d H:i:s O'),
-      );
-      $url = $entity->urlInfo('edit-form', array('language' => ConfigurableLanguage::load($langcode)));
+      ];
+      $url = $entity->urlInfo('edit-form', ['language' => ConfigurableLanguage::load($langcode)]);
       $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $langcode));
     }
 
@@ -345,11 +345,11 @@ protected function doTestAuthoringInfo() {
 
     // Try to post non valid values and check that they are rejected.
     $langcode = 'en';
-    $edit = array(
+    $edit = [
       // User names have by default length 8.
       'content_translation[uid]' => $this->randomMachineName(12),
       'content_translation[created]' => '19/11/1978',
-    );
+    ];
     $this->drupalPostForm($entity->urlInfo('edit-form'), $edit, $this->getFormSubmitAction($entity, $langcode));
     $this->assertTrue($this->xpath('//div[contains(@class, "error")]//ul'), 'Invalid values generate a list of form errors.');
     $metadata = $this->manager->getTranslationMetadata($entity->getTranslation($langcode));
@@ -369,9 +369,9 @@ protected function doTestTranslationDeletion() {
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
     $language = ConfigurableLanguage::load($langcode);
-    $url = $entity->urlInfo('edit-form', array('language' => $language));
-    $this->drupalPostForm($url, array(), t('Delete translation'));
-    $this->drupalPostForm(NULL, array(), t('Delete @language translation', array('@language' => $language->getName())));
+    $url = $entity->urlInfo('edit-form', ['language' => $language]);
+    $this->drupalPostForm($url, [], t('Delete translation'));
+    $this->drupalPostForm(NULL, [], t('Delete @language translation', ['@language' => $language->getName()]));
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId, TRUE);
     if ($this->assertTrue(is_object($entity), 'Entity found')) {
@@ -389,7 +389,7 @@ protected function doTestTranslationDeletion() {
    * Returns an array of entity field values to be tested.
    */
   protected function getNewEntityValues($langcode) {
-    return array($this->fieldName => array(array('value' => $this->randomMachineName(16))));
+    return [$this->fieldName => [['value' => $this->randomMachineName(16)]]];
   }
 
   /**
@@ -512,7 +512,7 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
@@ -555,10 +555,10 @@ protected function doTestTranslationChanged() {
 
         $langcode = $language->getId();
 
-        $edit = array(
+        $edit = [
           $this->fieldName . '[0][value]' => $this->randomString(),
-        );
-        $edit_path = $entity->urlInfo('edit-form', array('language' => $language));
+        ];
+        $edit_path = $entity->urlInfo('edit-form', ['language' => $language]);
         $this->drupalPostForm($edit_path, $edit, $this->getFormSubmitAction($entity, $langcode));
 
         $storage = $this->container->get('entity_type.manager')
@@ -567,11 +567,11 @@ protected function doTestTranslationChanged() {
         $entity = $storage->load($this->entityId);
         $this->assertEqual(
           $entity->getChangedTimeAcrossTranslations(), $entity->getTranslation($langcode)->getChangedTime(),
-          format_string('Changed time for language %language is the latest change over all languages.', array('%language' => $language->getName()))
+          format_string('Changed time for language %language is the latest change over all languages.', ['%language' => $language->getName()])
         );
       }
 
-      $timestamps = array();
+      $timestamps = [];
       foreach ($entity->getTranslationLanguages() as $language) {
         $next_timestamp = $entity->getTranslation($language->getId())->getChangedTime();
         if (!in_array($next_timestamp, $timestamps)) {
@@ -618,7 +618,7 @@ public function doTestChangedTimeAfterSaveWithoutChanges() {
 
       // Save the entity on the regular edit form.
       $language = $entity->language();
-      $edit_path = $entity->urlInfo('edit-form', array('language' => $language));
+      $edit_path = $entity->urlInfo('edit-form', ['language' => $language]);
       $this->drupalPostForm($edit_path, [], $this->getFormSubmitAction($entity, $language->getId()));
 
       $storage->resetCache([$this->entityId]);
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationWorkflowsTest.php b/core/modules/content_translation/src/Tests/ContentTranslationWorkflowsTest.php
index b1524eea1e95238374ad6971eafe96c03c4352e4..ac26a39abb5facab0bcc358c997fa7f60db0c42a 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationWorkflowsTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationWorkflowsTest.php
@@ -26,7 +26,7 @@ class ContentTranslationWorkflowsTest extends ContentTranslationTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'entity_test');
+  public static $modules = ['language', 'content_translation', 'entity_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -47,7 +47,7 @@ protected function getTranslatorPermissions() {
    * {@inheritdoc}
    */
   protected function getEditorPermissions() {
-    return array('administer entity_test content');
+    return ['administer entity_test content'];
   }
 
   /**
@@ -58,11 +58,11 @@ protected function setupEntity() {
 
     // Create a test entity.
     $user = $this->drupalCreateUser();
-    $values = array(
+    $values = [
       'name' => $this->randomMachineName(),
       'user_id' => $user->id(),
-      $this->fieldName => array(array('value' => $this->randomMachineName(16))),
-    );
+      $this->fieldName => [['value' => $this->randomMachineName(16)]],
+    ];
     $id = $this->createEntity($values, $default_langcode);
     $storage = $this->container->get('entity_type.manager')
       ->getStorage($this->entityTypeId);
@@ -72,7 +72,7 @@ protected function setupEntity() {
     // Create a translation.
     $this->drupalLogin($this->translator);
     $add_translation_url = Url::fromRoute("entity.$this->entityTypeId.content_translation_add", [$this->entityTypeId => $this->entity->id(), 'source' => $default_langcode, 'target' => $this->langcodes[2]]);
-    $this->drupalPostForm($add_translation_url, array(), t('Save'));
+    $this->drupalPostForm($add_translation_url, [], t('Save'));
     $this->rebuildContainer();
   }
 
@@ -114,10 +114,10 @@ function testWorkflows() {
     $this->doTestWorkflows($this->administrator, $expected_status);
 
     // Check that translation permissions allow the associated operations.
-    $ops = array('create' => t('Add'), 'update' => t('Edit'), 'delete' => t('Delete'));
+    $ops = ['create' => t('Add'), 'update' => t('Edit'), 'delete' => t('Delete')];
     $translations_url = $this->entity->urlInfo('drupal:content-translation-overview');
     foreach ($ops as $current_op => $item) {
-      $user = $this->drupalCreateUser(array($this->getTranslatePermission(), "$current_op content translations", 'view test entity'));
+      $user = $this->drupalCreateUser([$this->getTranslatePermission(), "$current_op content translations", 'view test entity']);
       $this->drupalLogin($user);
       $this->drupalGet($translations_url);
 
@@ -130,10 +130,10 @@ function testWorkflows() {
 
       foreach ($ops as $op => $label) {
         if ($op != $current_op) {
-          $this->assertNoLink($label, format_string('No %op link found.', array('%op' => $label)));
+          $this->assertNoLink($label, format_string('No %op link found.', ['%op' => $label]));
         }
         else {
-          $this->assertLink($label, 0, format_string('%op link found.', array('%op' => $label)));
+          $this->assertLink($label, 0, format_string('%op link found.', ['%op' => $label]));
         }
       }
     }
diff --git a/core/modules/content_translation/src/Tests/Views/ContentTranslationViewsUITest.php b/core/modules/content_translation/src/Tests/Views/ContentTranslationViewsUITest.php
index 36d880edf44d9e2ff7a333ba7239e7bcccd10264..07b5d00b0845d27634215f5c4094f6c6eb832b7c 100644
--- a/core/modules/content_translation/src/Tests/Views/ContentTranslationViewsUITest.php
+++ b/core/modules/content_translation/src/Tests/Views/ContentTranslationViewsUITest.php
@@ -16,21 +16,21 @@ class ContentTranslationViewsUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('content_translation');
+  public static $modules = ['content_translation'];
 
   /**
    * Tests the views UI.
    */
   public function testViewsUI() {
     $this->drupalGet('admin/structure/views/view/test_view/edit');
-    $this->assertTitle(t('@label (@table) | @site-name', array('@label' => 'Test view', '@table' => 'Views test data', '@site-name' => $this->config('system.site')->get('name'))));
+    $this->assertTitle(t('@label (@table) | @site-name', ['@label' => 'Test view', '@table' => 'Views test data', '@site-name' => $this->config('system.site')->get('name')]));
   }
 
 }
diff --git a/core/modules/content_translation/src/Tests/Views/TranslationLinkTest.php b/core/modules/content_translation/src/Tests/Views/TranslationLinkTest.php
index 4f5389568b117d89f862a3eefde7cb81b364de1f..23c74a40f541aa2d80de1e03a98c9c24d3ad7176 100644
--- a/core/modules/content_translation/src/Tests/Views/TranslationLinkTest.php
+++ b/core/modules/content_translation/src/Tests/Views/TranslationLinkTest.php
@@ -20,14 +20,14 @@ class TranslationLinkTest extends ContentTranslationTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_entity_translations_link');
+  public static $testViews = ['test_entity_translations_link'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('content_translation_test_views');
+  public static $modules = ['content_translation_test_views'];
 
   protected function setUp() {
     // @todo Use entity_type once it is has multilingual Views integration.
@@ -45,7 +45,7 @@ protected function setUp() {
     $user->langcode = Language::LANGCODE_NOT_SPECIFIED;
     $user->save();
 
-    ViewTestData::createTestViews(get_class($this), array('content_translation_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['content_translation_test_views']);
   }
 
   /**
diff --git a/core/modules/content_translation/tests/src/Functional/ContentTranslationEntityBundleUITest.php b/core/modules/content_translation/tests/src/Functional/ContentTranslationEntityBundleUITest.php
index c735716e1b80b50232fbeb5f89b22864e82c7d41..163b5e8ff31e15e120abce81c95c9946bbc42b1f 100644
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationEntityBundleUITest.php
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationEntityBundleUITest.php
@@ -11,11 +11,11 @@
  */
 class ContentTranslationEntityBundleUITest extends BrowserTestBase {
 
-  public static $modules = array('language', 'content_translation', 'node', 'comment', 'field_ui');
+  public static $modules = ['language', 'content_translation', 'node', 'comment', 'field_ui'];
 
   protected function setUp() {
     parent::setUp();
-    $user = $this->drupalCreateUser(array('access administration pages', 'administer languages', 'administer content translation', 'administer content types'));
+    $user = $this->drupalCreateUser(['access administration pages', 'administer languages', 'administer content translation', 'administer content types']);
     $this->drupalLogin($user);
   }
 
@@ -24,9 +24,9 @@ protected function setUp() {
    */
   public function testContentTypeUI() {
     // Create first content type.
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
     // Enable content translation.
-    $edit = array('language_configuration[content_translation]' => TRUE);
+    $edit = ['language_configuration[content_translation]' => TRUE];
     $this->drupalPostForm('admin/structure/types/manage/article', $edit, 'Save content type');
 
     // Make sure add page does not inherit translation configuration from first
@@ -35,11 +35,11 @@ public function testContentTypeUI() {
     $this->assertNoFieldChecked('edit-language-configuration-content-translation');
 
     // Create second content type and set content translation.
-    $edit = array(
+    $edit = [
       'name' => 'Page',
       'type' => 'page',
       'language_configuration[content_translation]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/add', $edit, 'Save and manage fields');
 
     // Make sure the settings are saved when creating the content type.
diff --git a/core/modules/content_translation/tests/src/Functional/ContentTranslationMetadataFieldsTest.php b/core/modules/content_translation/tests/src/Functional/ContentTranslationMetadataFieldsTest.php
index 0f1307945a87260e1f9183beed391f9dfd89c59a..bbad25ca9c24887cde0e742429c4afd1798a4c11 100644
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationMetadataFieldsTest.php
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationMetadataFieldsTest.php
@@ -28,7 +28,7 @@ class ContentTranslationMetadataFieldsTest extends ContentTranslationTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'node');
+  public static $modules = ['language', 'content_translation', 'node'];
 
   /**
    * The profile to install as a basis for testing.
diff --git a/core/modules/content_translation/tests/src/Functional/ContentTranslationStandardFieldsTest.php b/core/modules/content_translation/tests/src/Functional/ContentTranslationStandardFieldsTest.php
index 37178cacfad00b783dd9366ee104d5ee4276e387..c6a72a325eac584bf76e72a8f9ab27ff4447908c 100644
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationStandardFieldsTest.php
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationStandardFieldsTest.php
@@ -16,14 +16,14 @@ class ContentTranslationStandardFieldsTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'language',
     'content_translation',
     'node',
     'comment',
     'field_ui',
     'entity_test',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -36,7 +36,7 @@ class ContentTranslationStandardFieldsTest extends BrowserTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'access administration pages',
       'administer languages',
       'administer content translation',
@@ -45,7 +45,7 @@ protected function setUp() {
       'administer comment fields',
       'administer comments',
       'administer comment types',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
   }
 
diff --git a/core/modules/content_translation/tests/src/Functional/ContentTranslationTestBase.php b/core/modules/content_translation/tests/src/Functional/ContentTranslationTestBase.php
index 822cbdda383bac032331e134e68d55ad439466aa..ec7f87dd1bc32138306699b105b432fa58ac28c2 100644
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationTestBase.php
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationTestBase.php
@@ -18,7 +18,7 @@ abstract class ContentTranslationTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('text');
+  public static $modules = ['text'];
 
   /**
    * The entity type being tested.
@@ -102,7 +102,7 @@ protected function setUp() {
    * Adds additional languages.
    */
   protected function setupLanguages() {
-    $this->langcodes = array('it', 'fr');
+    $this->langcodes = ['it', 'fr'];
     foreach ($this->langcodes as $langcode) {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
@@ -113,7 +113,7 @@ protected function setupLanguages() {
    * Returns an array of permissions needed for the translator.
    */
   protected function getTranslatorPermissions() {
-    return array_filter(array($this->getTranslatePermission(), 'create content translations', 'update content translations', 'delete content translations'));
+    return array_filter([$this->getTranslatePermission(), 'create content translations', 'update content translations', 'delete content translations']);
   }
 
   /**
@@ -131,14 +131,14 @@ protected function getTranslatePermission() {
    */
   protected function getEditorPermissions() {
     // Every entity-type-specific test needs to define these.
-    return array();
+    return [];
   }
 
   /**
    * Returns an array of permissions needed for the administrator.
    */
   protected function getAdministratorPermissions() {
-    return array_merge($this->getEditorPermissions(), $this->getTranslatorPermissions(), array('administer content translation'));
+    return array_merge($this->getEditorPermissions(), $this->getTranslatorPermissions(), ['administer content translation']);
   }
 
   /**
@@ -180,12 +180,12 @@ protected function setupTestFields() {
     if (empty($this->fieldName)) {
       $this->fieldName = 'field_test_et_ui_test';
     }
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'type' => 'string',
       'entity_type' => $this->entityTypeId,
       'cardinality' => 1,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => $this->entityTypeId,
       'field_name' => $this->fieldName,
@@ -193,10 +193,10 @@ protected function setupTestFields() {
       'label' => 'Test translatable text-field',
     ])->save();
     entity_get_form_display($this->entityTypeId, $this->bundle, 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'string_textfield',
         'weight' => 0,
-      ))
+      ])
       ->save();
   }
 
@@ -225,7 +225,7 @@ protected function createEntity($values, $langcode, $bundle_name = NULL) {
     if (!($controller instanceof SqlContentEntityStorage)) {
       foreach ($values as $property => $value) {
         if (is_array($value)) {
-          $entity_values[$property] = array($langcode => $value);
+          $entity_values[$property] = [$langcode => $value];
         }
       }
     }
diff --git a/core/modules/content_translation/tests/src/Functional/ContentTranslationUISkipTest.php b/core/modules/content_translation/tests/src/Functional/ContentTranslationUISkipTest.php
index 74d5de5b97bd14907234f3032199634b851eeb22..02755e001a003b93c43761cc3dab1ddbb9a210c6 100644
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationUISkipTest.php
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationUISkipTest.php
@@ -16,17 +16,17 @@ class ContentTranslationUISkipTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('content_translation_test', 'user', 'node');
+  public static $modules = ['content_translation_test', 'user', 'node'];
 
   /**
    * Tests the content_translation_ui_skip key functionality.
    */
   function testUICheckSkip() {
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'translate any entity',
       'administer content translation',
       'administer languages'
-    ));
+    ]);
     $this->drupalLogin($admin_user);
     // Visit the content translation.
     $this->drupalGet('admin/config/regional/content-language');
diff --git a/core/modules/content_translation/tests/src/Functional/ContentTranslationUITestBase.php b/core/modules/content_translation/tests/src/Functional/ContentTranslationUITestBase.php
index 769006e5a49c918ae736c07b974751eafd96d416..accc3ca8c239ef23db2ad2db845e7d20123d2ed7 100644
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationUITestBase.php
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationUITestBase.php
@@ -97,7 +97,7 @@ protected function doTestBasicTranslation() {
     foreach ($values[$default_langcode] as $property => $value) {
       $stored_value = $this->getValue($translation, $property, $default_langcode);
       $value = is_array($value) ? $value[0]['value'] : $value;
-      $message = format_string('@property correctly stored in the default language.', array('@property' => $property));
+      $message = format_string('@property correctly stored in the default language.', ['@property' => $property]);
       $this->assertEqual($stored_value, $value, $message);
     }
 
@@ -111,7 +111,7 @@ protected function doTestBasicTranslation() {
       $entity->getEntityTypeId() => $entity->id(),
       'source' => $default_langcode,
       'target' => $langcode
-    ], array('language' => $language));
+    ], ['language' => $language]);
     $this->drupalPostForm($add_url, $this->getEditValues($values, $langcode), $this->getFormSubmitActionForNewTranslation($entity, $langcode));
 
     // Assert that HTML is escaped in "all languages" in UI after SafeMarkup
@@ -138,11 +138,11 @@ protected function doTestBasicTranslation() {
     $author_field_name = $entity->hasField('content_translation_uid') ? 'content_translation_uid' : 'uid';
     if ($entity->getFieldDefinition($author_field_name)->isTranslatable()) {
       $this->assertEqual($metadata_target_translation->getAuthor()->id(), $this->translator->id(),
-        SafeMarkup::format('Author of the target translation @langcode correctly stored for translatable owner field.', array('@langcode' => $langcode)));
+        SafeMarkup::format('Author of the target translation @langcode correctly stored for translatable owner field.', ['@langcode' => $langcode]));
 
       $this->assertNotEqual($metadata_target_translation->getAuthor()->id(), $metadata_source_translation->getAuthor()->id(),
         SafeMarkup::format('Author of the target translation @target different from the author of the source translation @source for translatable owner field.',
-          array('@target' => $langcode, '@source' => $default_langcode)));
+          ['@target' => $langcode, '@source' => $default_langcode]));
     }
     else {
       $this->assertEqual($metadata_target_translation->getAuthor()->id(), $this->editor->id(), 'Author of the entity remained untouched after translation for non translatable owner field.');
@@ -152,7 +152,7 @@ protected function doTestBasicTranslation() {
     if ($entity->getFieldDefinition($created_field_name)->isTranslatable()) {
       $this->assertTrue($metadata_target_translation->getCreatedTime() > $metadata_source_translation->getCreatedTime(),
         SafeMarkup::format('Translation creation timestamp of the target translation @target is newer than the creation timestamp of the source translation @source for translatable created field.',
-          array('@target' => $langcode, '@source' => $default_langcode)));
+          ['@target' => $langcode, '@source' => $default_langcode]));
     }
     else {
       $this->assertEqual($metadata_target_translation->getCreatedTime(), $metadata_source_translation->getCreatedTime(), 'Creation timestamp of the entity remained untouched after translation for non translatable created field.');
@@ -170,13 +170,13 @@ protected function doTestBasicTranslation() {
     $langcode = 'fr';
     $language = ConfigurableLanguage::load($langcode);
     $source_langcode = 'it';
-    $edit = array('source_langcode[source]' => $source_langcode);
+    $edit = ['source_langcode[source]' => $source_langcode];
     $entity_type_id = $entity->getEntityTypeId();
     $add_url = Url::fromRoute("entity.$entity_type_id.content_translation_add", [
       $entity->getEntityTypeId() => $entity->id(),
       'source' => $default_langcode,
       'target' => $langcode
-    ], array('language' => $language));
+    ], ['language' => $language]);
     // This does not save anything, it merely reloads the form and fills in the
     // fields with the values from the different source language.
     $this->drupalPostForm($add_url, $edit, t('Change'));
@@ -184,13 +184,13 @@ protected function doTestBasicTranslation() {
 
     // Add another translation and mark the other ones as outdated.
     $values[$langcode] = $this->getNewEntityValues($langcode);
-    $edit = $this->getEditValues($values, $langcode) + array('content_translation[retranslate]' => TRUE);
+    $edit = $this->getEditValues($values, $langcode) + ['content_translation[retranslate]' => TRUE];
     $entity_type_id = $entity->getEntityTypeId();
     $add_url = Url::fromRoute("entity.$entity_type_id.content_translation_add", [
       $entity->getEntityTypeId() => $entity->id(),
       'source' => $source_langcode,
       'target' => $langcode
-    ], array('language' => $language));
+    ], ['language' => $language]);
     $this->drupalPostForm($add_url, $edit, $this->getFormSubmitActionForNewTranslation($entity, $langcode));
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
@@ -203,7 +203,7 @@ protected function doTestBasicTranslation() {
       foreach ($property_values as $property => $value) {
         $stored_value = $this->getValue($translation, $property, $langcode);
         $value = is_array($value) ? $value[0]['value'] : $value;
-        $message = format_string('%property correctly stored with language %language.', array('%property' => $property, '%language' => $langcode));
+        $message = format_string('%property correctly stored with language %language.', ['%property' => $property, '%language' => $langcode]);
         $this->assertEqual($stored_value, $value, $message);
       }
     }
@@ -223,13 +223,13 @@ protected function doTestTranslationOverview() {
 
     foreach ($this->langcodes as $langcode) {
       if ($entity->hasTranslation($langcode)) {
-        $language = new Language(array('id' => $langcode));
+        $language = new Language(['id' => $langcode]);
         $view_url = $entity->url('canonical', ['language' => $language]);
         $elements = $this->xpath('//table//a[@href=:href]', [':href' => $view_url]);
-        $this->assertEqual((string) $elements[0], $entity->getTranslation($langcode)->label(), format_string('Label correctly shown for %language translation.', array('%language' => $langcode)));
-        $edit_path = $entity->url('edit-form', array('language' => $language));
-        $elements = $this->xpath('//table//ul[@class="dropbutton"]/li/a[@href=:href]', array(':href' => $edit_path));
-        $this->assertEqual((string) $elements[0], t('Edit'), format_string('Edit link correct for %language translation.', array('%language' => $langcode)));
+        $this->assertEqual((string) $elements[0], $entity->getTranslation($langcode)->label(), format_string('Label correctly shown for %language translation.', ['%language' => $langcode]));
+        $edit_path = $entity->url('edit-form', ['language' => $language]);
+        $elements = $this->xpath('//table//ul[@class="dropbutton"]/li/a[@href=:href]', [':href' => $edit_path]);
+        $this->assertEqual((string) $elements[0], t('Edit'), format_string('Edit link correct for %language translation.', ['%language' => $langcode]));
       }
     }
   }
@@ -246,8 +246,8 @@ protected function doTestOutdatedStatus() {
     $languages = \Drupal::languageManager()->getLanguages();
 
     // Mark translations as outdated.
-    $edit = array('content_translation[retranslate]' => TRUE);
-    $edit_path = $entity->urlInfo('edit-form', array('language' => $languages[$langcode]));
+    $edit = ['content_translation[retranslate]' => TRUE];
+    $edit_path = $entity->urlInfo('edit-form', ['language' => $languages[$langcode]]);
     $this->drupalPostForm($edit_path, $edit, $this->getFormSubmitAction($entity, $langcode));
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
@@ -255,7 +255,7 @@ protected function doTestOutdatedStatus() {
     // Check that every translation has the correct "outdated" status, and that
     // the Translation fieldset is open if the translation is "outdated".
     foreach ($this->langcodes as $added_langcode) {
-      $url = $entity->urlInfo('edit-form', array('language' => ConfigurableLanguage::load($added_langcode)));
+      $url = $entity->urlInfo('edit-form', ['language' => ConfigurableLanguage::load($added_langcode)]);
       $this->drupalGet($url);
       if ($added_langcode == $langcode) {
         $this->assertFieldByXPath('//input[@name="content_translation[retranslate]"]', FALSE, 'The retranslate flag is not checked by default.');
@@ -264,7 +264,7 @@ protected function doTestOutdatedStatus() {
       else {
         $this->assertFieldByXPath('//input[@name="content_translation[outdated]"]', TRUE, 'The translate flag is checked by default.');
         $this->assertTrue($this->xpath('//details[@id="edit-content-translation" and @open="open"]'), 'The translation tab is correctly expanded when the translation is outdated.');
-        $edit = array('content_translation[outdated]' => FALSE);
+        $edit = ['content_translation[outdated]' => FALSE];
         $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $added_langcode));
         $this->drupalGet($url);
         $this->assertFieldByXPath('//input[@name="content_translation[retranslate]"]', FALSE, 'The retranslate flag is now shown.');
@@ -289,8 +289,8 @@ protected function doTestPublishedStatus() {
     // Unpublish translations.
     foreach ($this->langcodes as $index => $langcode) {
       if ($index > 0) {
-        $url = $entity->urlInfo('edit-form', array('language' => ConfigurableLanguage::load($langcode)));
-        $edit = array('content_translation[status]' => FALSE);
+        $url = $entity->urlInfo('edit-form', ['language' => ConfigurableLanguage::load($langcode)]);
+        $edit = ['content_translation[status]' => FALSE];
         $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $langcode));
         $storage = $this->container->get('entity_type.manager')
           ->getStorage($this->entityTypeId);
@@ -313,20 +313,20 @@ protected function doTestAuthoringInfo() {
       ->getStorage($this->entityTypeId);
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
-    $values = array();
+    $values = [];
 
     // Post different authoring information for each translation.
     foreach ($this->langcodes as $index => $langcode) {
       $user = $this->drupalCreateUser();
-      $values[$langcode] = array(
+      $values[$langcode] = [
         'uid' => $user->id(),
         'created' => REQUEST_TIME - mt_rand(0, 1000),
-      );
-      $edit = array(
+      ];
+      $edit = [
         'content_translation[uid]' => $user->getUsername(),
         'content_translation[created]' => format_date($values[$langcode]['created'], 'custom', 'Y-m-d H:i:s O'),
-      );
-      $url = $entity->urlInfo('edit-form', array('language' => ConfigurableLanguage::load($langcode)));
+      ];
+      $url = $entity->urlInfo('edit-form', ['language' => ConfigurableLanguage::load($langcode)]);
       $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $langcode));
     }
 
@@ -342,11 +342,11 @@ protected function doTestAuthoringInfo() {
 
     // Try to post non valid values and check that they are rejected.
     $langcode = 'en';
-    $edit = array(
+    $edit = [
       // User names have by default length 8.
       'content_translation[uid]' => $this->randomMachineName(12),
       'content_translation[created]' => '19/11/1978',
-    );
+    ];
     $this->drupalPostForm($entity->urlInfo('edit-form'), $edit, $this->getFormSubmitAction($entity, $langcode));
     $this->assertTrue($this->xpath('//div[contains(@class, "error")]//ul'), 'Invalid values generate a list of form errors.');
     $metadata = $this->manager->getTranslationMetadata($entity->getTranslation($langcode));
@@ -366,9 +366,9 @@ protected function doTestTranslationDeletion() {
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
     $language = ConfigurableLanguage::load($langcode);
-    $url = $entity->urlInfo('edit-form', array('language' => $language));
-    $this->drupalPostForm($url, array(), t('Delete translation'));
-    $this->drupalPostForm(NULL, array(), t('Delete @language translation', array('@language' => $language->getName())));
+    $url = $entity->urlInfo('edit-form', ['language' => $language]);
+    $this->drupalPostForm($url, [], t('Delete translation'));
+    $this->drupalPostForm(NULL, [], t('Delete @language translation', ['@language' => $language->getName()]));
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId, TRUE);
     if ($this->assertTrue(is_object($entity), 'Entity found')) {
@@ -386,7 +386,7 @@ protected function doTestTranslationDeletion() {
    * Returns an array of entity field values to be tested.
    */
   protected function getNewEntityValues($langcode) {
-    return array($this->fieldName => array(array('value' => $this->randomMachineName(16))));
+    return [$this->fieldName => [['value' => $this->randomMachineName(16)]]];
   }
 
   /**
@@ -509,7 +509,7 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
@@ -552,10 +552,10 @@ protected function doTestTranslationChanged() {
 
         $langcode = $language->getId();
 
-        $edit = array(
+        $edit = [
           $this->fieldName . '[0][value]' => $this->randomString(),
-        );
-        $edit_path = $entity->urlInfo('edit-form', array('language' => $language));
+        ];
+        $edit_path = $entity->urlInfo('edit-form', ['language' => $language]);
         $this->drupalPostForm($edit_path, $edit, $this->getFormSubmitAction($entity, $langcode));
 
         $storage = $this->container->get('entity_type.manager')
@@ -564,11 +564,11 @@ protected function doTestTranslationChanged() {
         $entity = $storage->load($this->entityId);
         $this->assertEqual(
           $entity->getChangedTimeAcrossTranslations(), $entity->getTranslation($langcode)->getChangedTime(),
-          format_string('Changed time for language %language is the latest change over all languages.', array('%language' => $language->getName()))
+          format_string('Changed time for language %language is the latest change over all languages.', ['%language' => $language->getName()])
         );
       }
 
-      $timestamps = array();
+      $timestamps = [];
       foreach ($entity->getTranslationLanguages() as $language) {
         $next_timestamp = $entity->getTranslation($language->getId())->getChangedTime();
         if (!in_array($next_timestamp, $timestamps)) {
@@ -615,7 +615,7 @@ public function doTestChangedTimeAfterSaveWithoutChanges() {
 
       // Save the entity on the regular edit form.
       $language = $entity->language();
-      $edit_path = $entity->urlInfo('edit-form', array('language' => $language));
+      $edit_path = $entity->urlInfo('edit-form', ['language' => $language]);
       $this->drupalPostForm($edit_path, [], $this->getFormSubmitAction($entity, $language->getId()));
 
       $storage->resetCache([$this->entityId]);
diff --git a/core/modules/content_translation/tests/src/Kernel/ContentTranslationConfigImportTest.php b/core/modules/content_translation/tests/src/Kernel/ContentTranslationConfigImportTest.php
index f650270085ed888e8af98db04e189501b3ca1a08..732d74be289cfa6d543502cbf37aea0bb1acc480 100644
--- a/core/modules/content_translation/tests/src/Kernel/ContentTranslationConfigImportTest.php
+++ b/core/modules/content_translation/tests/src/Kernel/ContentTranslationConfigImportTest.php
@@ -25,7 +25,7 @@ class ContentTranslationConfigImportTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'entity_test', 'language', 'content_translation');
+  public static $modules = ['system', 'user', 'entity_test', 'language', 'content_translation'];
 
   /**
    * {@inheritdoc}
@@ -69,22 +69,22 @@ function testConfigImportUpdates() {
     $this->assertIdentical($storage->exists($config_name), FALSE, $config_name . ' not found.');
 
     // Create new config entity.
-    $data = array(
+    $data = [
       'uuid' => 'a019d89b-c4d9-4ed4-b859-894e4e2e93cf',
       'langcode' => 'en',
       'status' => TRUE,
-      'dependencies' => array(
-        'module' => array('content_translation')
-      ),
+      'dependencies' => [
+        'module' => ['content_translation']
+      ],
       'id' => $config_id,
       'target_entity_type_id' => 'entity_test_mul',
       'target_bundle' => 'entity_test_mul',
       'default_langcode' => 'site_default',
       'language_alterable' => FALSE,
-      'third_party_settings' => array(
-        'content_translation' => array('enabled' => TRUE),
-      ),
-    );
+      'third_party_settings' => [
+        'content_translation' => ['enabled' => TRUE],
+      ],
+    ];
     $sync->write($config_name, $data);
     $this->assertIdentical($sync->exists($config_name), TRUE, $config_name . ' found.');
 
diff --git a/core/modules/content_translation/tests/src/Kernel/ContentTranslationSettingsApiTest.php b/core/modules/content_translation/tests/src/Kernel/ContentTranslationSettingsApiTest.php
index 291cdf9714e191693b66cf37c59ce3bb549b3783..9b64ba83d401cf9c4179ece0d862fda885604e2e 100644
--- a/core/modules/content_translation/tests/src/Kernel/ContentTranslationSettingsApiTest.php
+++ b/core/modules/content_translation/tests/src/Kernel/ContentTranslationSettingsApiTest.php
@@ -16,7 +16,7 @@ class ContentTranslationSettingsApiTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'user', 'entity_test');
+  public static $modules = ['language', 'content_translation', 'user', 'entity_test'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/content_translation/tests/src/Kernel/ContentTranslationSyncUnitTest.php b/core/modules/content_translation/tests/src/Kernel/ContentTranslationSyncUnitTest.php
index eb52e5092a0564d807cdebb13628a17454792f43..30228076ac0e7a6df4f8478559b7a27612505bdc 100644
--- a/core/modules/content_translation/tests/src/Kernel/ContentTranslationSyncUnitTest.php
+++ b/core/modules/content_translation/tests/src/Kernel/ContentTranslationSyncUnitTest.php
@@ -54,17 +54,17 @@ class ContentTranslationSyncUnitTest extends KernelTestBase {
    */
   protected $unchangedFieldValues;
 
-  public static $modules = array('language', 'content_translation');
+  public static $modules = ['language', 'content_translation'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->synchronizer = new FieldTranslationSynchronizer($this->container->get('entity.manager'));
-    $this->synchronized = array('sync1', 'sync2');
-    $this->columns = array_merge($this->synchronized, array('var1', 'var2'));
-    $this->langcodes = array('en', 'it', 'fr', 'de', 'es');
+    $this->synchronized = ['sync1', 'sync2'];
+    $this->columns = array_merge($this->synchronized, ['var1', 'var2']);
+    $this->langcodes = ['en', 'it', 'fr', 'de', 'es'];
     $this->cardinality = 4;
-    $this->unchangedFieldValues = array();
+    $this->unchangedFieldValues = [];
 
     // Set up an initial set of values in the correct state, that is with
     // "synchronized" values being equal.
@@ -88,7 +88,7 @@ public function testFieldSync() {
     $sync_langcode = $this->langcodes[2];
     $unchanged_items = $this->unchangedFieldValues[$sync_langcode];
     $field_values = $this->unchangedFieldValues;
-    $item = array();
+    $item = [];
     foreach ($this->columns as $column) {
       $item[$column] = $this->randomMachineName();
     }
@@ -140,7 +140,7 @@ public function testFieldSync() {
     $sync_langcode = $this->langcodes[3];
     $unchanged_items = $this->unchangedFieldValues[$sync_langcode];
     $field_values = $this->unchangedFieldValues;
-    $field_values[$sync_langcode] = array();
+    $field_values[$sync_langcode] = [];
     // Scramble the items.
     foreach ($unchanged_items as $delta => $item) {
       $new_delta = ($delta + 1) % $this->cardinality;
@@ -179,7 +179,7 @@ public function testMultipleSyncedValues() {
 
     // Determine whether the unchanged values should be altered depending on
     // their delta.
-    $delta_callbacks = array(
+    $delta_callbacks = [
       // Continuous field values: all values are equal.
       function($delta) { return TRUE; },
       // Alternated field values: only the even ones are equal.
@@ -188,7 +188,7 @@ function($delta) { return $delta % 2 !== 0; },
       function($delta) { return $delta === 1 || $delta === 2; },
       // Sparse field values: only the "extreme" ones are equal.
       function($delta) { return $delta === 0 || $delta === 3; },
-    );
+    ];
 
     foreach ($delta_callbacks as $delta_callback) {
       $field_values = $this->unchangedFieldValues;
diff --git a/core/modules/content_translation/tests/src/Unit/Access/ContentTranslationManageAccessCheckTest.php b/core/modules/content_translation/tests/src/Unit/Access/ContentTranslationManageAccessCheckTest.php
index 7390c0e44ce4fb9358ea3a1db861e26abbff88df..ad7317f3ad695496a977d0e8d59bab85cc90b509 100644
--- a/core/modules/content_translation/tests/src/Unit/Access/ContentTranslationManageAccessCheckTest.php
+++ b/core/modules/content_translation/tests/src/Unit/Access/ContentTranslationManageAccessCheckTest.php
@@ -69,18 +69,18 @@ public function testCreateAccess() {
     $language_manager->expects($this->at(0))
       ->method('getLanguage')
       ->with($this->equalTo($source))
-      ->will($this->returnValue(new Language(array('id' => 'en'))));
+      ->will($this->returnValue(new Language(['id' => 'en'])));
     $language_manager->expects($this->at(1))
       ->method('getLanguages')
-      ->will($this->returnValue(array('en' => array(), 'it' => array())));
+      ->will($this->returnValue(['en' => [], 'it' => []]));
     $language_manager->expects($this->at(2))
       ->method('getLanguage')
       ->with($this->equalTo($source))
-      ->will($this->returnValue(new Language(array('id' => 'en'))));
+      ->will($this->returnValue(new Language(['id' => 'en'])));
     $language_manager->expects($this->at(3))
       ->method('getLanguage')
       ->with($this->equalTo($target))
-      ->will($this->returnValue(new Language(array('id' => 'it'))));
+      ->will($this->returnValue(new Language(['id' => 'it'])));
 
     // Set the mock entity. We need to use ContentEntityBase for mocking due to
     // issues with phpunit and multiple interfaces.
@@ -92,7 +92,7 @@ public function testCreateAccess() {
     $entity->expects($this->once())
       ->method('getTranslationLanguages')
       ->with()
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $entity->expects($this->once())
       ->method('getCacheContexts')
       ->willReturn([]);
@@ -101,10 +101,10 @@ public function testCreateAccess() {
       ->willReturn(Cache::PERMANENT);
     $entity->expects($this->once())
       ->method('getCacheTags')
-      ->will($this->returnValue(array('node:1337')));
+      ->will($this->returnValue(['node:1337']));
     $entity->expects($this->once())
       ->method('getCacheContexts')
-      ->willReturn(array());
+      ->willReturn([]);
 
     // Set the route requirements.
     $route = new Route('test_route');
diff --git a/core/modules/content_translation/tests/src/Unit/Menu/ContentTranslationLocalTasksTest.php b/core/modules/content_translation/tests/src/Unit/Menu/ContentTranslationLocalTasksTest.php
index 63dad2f6f6ab9e7ae81568da70b7baeb678d006f..a72d9b7ff6c3e3e978d03e2c055f4e50fb2e4248 100644
--- a/core/modules/content_translation/tests/src/Unit/Menu/ContentTranslationLocalTasksTest.php
+++ b/core/modules/content_translation/tests/src/Unit/Menu/ContentTranslationLocalTasksTest.php
@@ -12,25 +12,25 @@
 class ContentTranslationLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array(
+    $this->directoryList = [
       'content_translation' => 'core/modules/content_translation',
       'node' => 'core/modules/node',
-    );
+    ];
     parent::setUp();
 
     $entity_type = $this->getMock('Drupal\Core\Entity\EntityTypeInterface');
     $entity_type->expects($this->any())
       ->method('getLinkTemplate')
-      ->will($this->returnValueMap(array(
-        array('canonical', 'entity.node.canonical'),
-        array('drupal:content-translation-overview', 'entity.node.content_translation_overview'),
-      )));
+      ->will($this->returnValueMap([
+        ['canonical', 'entity.node.canonical'],
+        ['drupal:content-translation-overview', 'entity.node.content_translation_overview'],
+      ]));
     $content_translation_manager = $this->getMock('Drupal\content_translation\ContentTranslationManagerInterface');
     $content_translation_manager->expects($this->any())
       ->method('getSupportedEntityTypes')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'node' => $entity_type,
-      )));
+      ]));
     \Drupal::getContainer()->set('content_translation.manager', $content_translation_manager);
     \Drupal::getContainer()->set('string_translation', $this->getStringTranslationStub());
   }
@@ -48,22 +48,22 @@ public function testBlockAdminDisplay($route, $expected) {
    * Provides a list of routes to test.
    */
   public function providerTestBlockAdminDisplay() {
-    return array(
-      array('entity.node.canonical', array(array(
+    return [
+      ['entity.node.canonical', [[
         'content_translation.local_tasks:entity.node.content_translation_overview',
         'entity.node.canonical',
         'entity.node.edit_form',
         'entity.node.delete_form',
         'entity.node.version_history',
-      ))),
-      array('entity.node.content_translation_overview', array(array(
+      ]]],
+      ['entity.node.content_translation_overview', [[
         'content_translation.local_tasks:entity.node.content_translation_overview',
         'entity.node.canonical',
         'entity.node.edit_form',
         'entity.node.delete_form',
         'entity.node.version_history',
-      ))),
-    );
+      ]]],
+    ];
   }
 
 }
diff --git a/core/modules/contextual/contextual.module b/core/modules/contextual/contextual.module
index 6cb1fcffcf0f37b8ac5d57511ad438873582f1f8..cf20318cb1e191ca818ffe7caf06814c4b6b135e 100644
--- a/core/modules/contextual/contextual.module
+++ b/core/modules/contextual/contextual.module
@@ -27,26 +27,26 @@ function contextual_toolbar() {
     return $items;
   }
 
-  $items['contextual'] += array(
+  $items['contextual'] += [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'html_tag',
       '#tag' => 'button',
       '#value' => t('Edit'),
-      '#attributes' => array(
-        'class' => array('toolbar-icon', 'toolbar-icon-edit'),
+      '#attributes' => [
+        'class' => ['toolbar-icon', 'toolbar-icon-edit'],
         'aria-pressed' => 'false',
-      ),
-    ),
-    '#wrapper_attributes' => array(
-      'class' => array('hidden', 'contextual-toolbar-tab'),
-    ),
-    '#attached' => array(
-      'library' => array(
+      ],
+    ],
+    '#wrapper_attributes' => [
+      'class' => ['hidden', 'contextual-toolbar-tab'],
+    ],
+    '#attached' => [
+      'library' => [
         'contextual/drupal.contextual-toolbar',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   return $items;
 }
@@ -75,7 +75,7 @@ function contextual_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.contextual':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Contextual links module gives users with the <em>Use contextual links</em> permission quick access to tasks associated with certain areas of pages on your site. For example, a menu displayed as a block has links to edit the menu and configure the block. For more information, see the <a href=":contextual">online documentation for the Contextual Links module</a>.', array(':contextual' => 'https://www.drupal.org/documentation/modules/contextual')) . '</p>';
+      $output .= '<p>' . t('The Contextual links module gives users with the <em>Use contextual links</em> permission quick access to tasks associated with certain areas of pages on your site. For example, a menu displayed as a block has links to edit the menu and configure the block. For more information, see the <a href=":contextual">online documentation for the Contextual Links module</a>.', [':contextual' => 'https://www.drupal.org/documentation/modules/contextual']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Displaying contextual links') . '</dt>';
@@ -88,8 +88,8 @@ function contextual_help($route_name, RouteMatchInterface $route_match) {
         '#alt' => t('contextual links button')
       ];
       $sample_picture = \Drupal::service('renderer')->render($sample_picture);
-      $output .= '<li>' . t('Hovering over the area of interest will temporarily make the contextual links button visible (which looks like a pencil in most themes, and is normally displayed in the upper right corner of the area). The icon typically looks like this: @picture', array('@picture' => $sample_picture)) . '</li>';
-      $output .= '<li>' . t('If you have the <a href=":toolbar">Toolbar module</a> enabled, clicking the contextual links button in the toolbar (which looks like a pencil) will make all contextual links buttons on the page visible. Clicking this button again will toggle them to invisible.', array(':toolbar' => (\Drupal::moduleHandler()->moduleExists('toolbar')) ? \Drupal::url('help.page', array('name' => 'toolbar')) : '#')) . '</li>';
+      $output .= '<li>' . t('Hovering over the area of interest will temporarily make the contextual links button visible (which looks like a pencil in most themes, and is normally displayed in the upper right corner of the area). The icon typically looks like this: @picture', ['@picture' => $sample_picture]) . '</li>';
+      $output .= '<li>' . t('If you have the <a href=":toolbar">Toolbar module</a> enabled, clicking the contextual links button in the toolbar (which looks like a pencil) will make all contextual links buttons on the page visible. Clicking this button again will toggle them to invisible.', [':toolbar' => (\Drupal::moduleHandler()->moduleExists('toolbar')) ? \Drupal::url('help.page', ['name' => 'toolbar']) : '#']) . '</li>';
       $output .= '</ol>';
       $output .= t('Once the contextual links button for the area of interest is visible, click the button to display the links.');
       $output .= '</dd>';
@@ -132,10 +132,10 @@ function contextual_preprocess(&$variables, $hook, $info) {
     // users, contextual_page_attachments() only adds the asset library for
     // users with the 'access contextual links' permission, thus preventing
     // unnecessary HTTP requests for users without that permission.
-    $variables['title_suffix']['contextual_links'] = array(
+    $variables['title_suffix']['contextual_links'] = [
       '#type' => 'contextual_links_placeholder',
       '#id' => _contextual_links_to_id($element['#contextual_links']),
-    );
+    ];
   }
 }
 
@@ -172,7 +172,7 @@ function contextual_contextual_links_view_alter(&$element, $items) {
  *   use in a data- attribute.
  */
 function _contextual_links_to_id($contextual_links) {
-  $ids = array();
+  $ids = [];
   $langcode = \Drupal::languageManager()->getCurrentLanguage(LanguageInterface::TYPE_URL)->getId();
   foreach ($contextual_links as $group => $args) {
     $route_parameters = UrlHelper::buildQuery($args['route_parameters']);
@@ -199,17 +199,17 @@ function _contextual_links_to_id($contextual_links) {
  *   The value for a #contextual_links property.
  */
 function _contextual_id_to_links($id) {
-  $contextual_links = array();
+  $contextual_links = [];
   $contexts = explode('|', $id);
   foreach ($contexts as $context) {
     list($group, $route_parameters_raw, $metadata_raw) = explode(':', $context);
     parse_str($route_parameters_raw, $route_parameters);
-    $metadata = array();
+    $metadata = [];
     parse_str($metadata_raw, $metadata);
-    $contextual_links[$group] = array(
+    $contextual_links[$group] = [
       'route_parameters' => $route_parameters,
       'metadata' => $metadata,
-    );
+    ];
   }
   return $contextual_links;
 }
diff --git a/core/modules/contextual/contextual.views.inc b/core/modules/contextual/contextual.views.inc
index 528b3bbed09b41f26d60bd9be4facf9da9d4bc5a..bac5522f159a03249dedaa62b9f32ecf0888d7b6 100644
--- a/core/modules/contextual/contextual.views.inc
+++ b/core/modules/contextual/contextual.views.inc
@@ -9,11 +9,11 @@
  * Implements hook_views_data_alter().
  */
 function contextual_views_data_alter(&$data) {
-  $data['views']['contextual_links'] = array(
+  $data['views']['contextual_links'] = [
     'title' => t('Contextual Links'),
     'help' => t('Display fields in a contextual links menu.'),
-    'field' => array(
+    'field' => [
       'id' => 'contextual_links',
-    ),
-  );
+    ],
+  ];
 }
diff --git a/core/modules/contextual/src/ContextualController.php b/core/modules/contextual/src/ContextualController.php
index 0812ad13d2690641a8726d478e54235f6ac36ed7..b1fe245c040eb012b21c90d7d1ca309597f26646 100644
--- a/core/modules/contextual/src/ContextualController.php
+++ b/core/modules/contextual/src/ContextualController.php
@@ -32,12 +32,12 @@ public function render(Request $request) {
       throw new BadRequestHttpException(t('No contextual ids specified.'));
     }
 
-    $rendered = array();
+    $rendered = [];
     foreach ($ids as $id) {
-      $element = array(
+      $element = [
         '#type' => 'contextual_links',
         '#contextual_links' => _contextual_id_to_links($id),
-      );
+      ];
       $rendered[$id] = $this->container->get('renderer')->renderRoot($element);
     }
 
diff --git a/core/modules/contextual/src/Element/ContextualLinks.php b/core/modules/contextual/src/Element/ContextualLinks.php
index 8f670236fd213b1d243bf61aba7013e4c87ded66..62e8966afae7c9e04e4b907fa897224b5dcf2143 100644
--- a/core/modules/contextual/src/Element/ContextualLinks.php
+++ b/core/modules/contextual/src/Element/ContextualLinks.php
@@ -18,19 +18,19 @@ class ContextualLinks extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderLinks'),
-      ),
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderLinks'],
+      ],
       '#theme' => 'links__contextual',
-      '#links' => array(),
-      '#attributes' => array('class' => array('contextual-links')),
-      '#attached' => array(
-        'library' => array(
+      '#links' => [],
+      '#attributes' => ['class' => ['contextual-links']],
+      '#attached' => [
+        'library' => [
           'contextual/drupal.contextual-links',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -60,26 +60,26 @@ public function getInfo() {
    */
   public static function preRenderLinks(array $element) {
     // Retrieve contextual menu links.
-    $items = array();
+    $items = [];
 
     $contextual_links_manager = static::contextualLinkManager();
 
     foreach ($element['#contextual_links'] as $group => $args) {
-      $args += array(
-        'route_parameters' => array(),
-        'metadata' => array(),
-      );
+      $args += [
+        'route_parameters' => [],
+        'metadata' => [],
+      ];
       $items += $contextual_links_manager->getContextualLinksArrayByGroup($group, $args['route_parameters'], $args['metadata']);
     }
 
     // Transform contextual links into parameters suitable for links.html.twig.
-    $links = array();
+    $links = [];
     foreach ($items as $class => $item) {
       $class = Html::getClass($class);
-      $links[$class] = array(
+      $links[$class] = [
         'title' => $item['title'],
         'url' => Url::fromRoute(isset($item['route_name']) ? $item['route_name'] : '', isset($item['route_parameters']) ? $item['route_parameters'] : []),
-      );
+      ];
     }
     $element['#links'] = $links;
 
diff --git a/core/modules/contextual/src/Element/ContextualLinksPlaceholder.php b/core/modules/contextual/src/Element/ContextualLinksPlaceholder.php
index 92f4b2bed50c0a5e8c10736d0c3bdaa9a132c49d..2fba8db3f13fdfeee0f11721817a3cd2418fad55 100644
--- a/core/modules/contextual/src/Element/ContextualLinksPlaceholder.php
+++ b/core/modules/contextual/src/Element/ContextualLinksPlaceholder.php
@@ -18,12 +18,12 @@ class ContextualLinksPlaceholder extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderPlaceholder'),
-      ),
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderPlaceholder'],
+      ],
       '#id' => NULL,
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/contextual/src/Plugin/views/field/ContextualLinks.php b/core/modules/contextual/src/Plugin/views/field/ContextualLinks.php
index 585b7f6691ccc0d240b6502c226471b5dedc28d4..6bd5c01a43970343b0c9c58ff6240e70c1784aea 100644
--- a/core/modules/contextual/src/Plugin/views/field/ContextualLinks.php
+++ b/core/modules/contextual/src/Plugin/views/field/ContextualLinks.php
@@ -35,8 +35,8 @@ public function usesGroupBy() {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['fields'] = array('default' => array());
-    $options['destination'] = array('default' => 1);
+    $options['fields'] = ['default' => []];
+    $options['destination'] = ['default' => 1];
 
     return $options;
   }
@@ -48,23 +48,23 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     $all_fields = $this->view->display_handler->getFieldLabels();
     // Offer to include only those fields that follow this one.
     $field_options = array_slice($all_fields, 0, array_search($this->options['id'], array_keys($all_fields)));
-    $form['fields'] = array(
+    $form['fields'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Fields'),
       '#description' => $this->t('Fields to be included as contextual links.'),
       '#options' => $field_options,
       '#default_value' => $this->options['fields'],
-    );
-    $form['destination'] = array(
+    ];
+    $form['destination'] = [
       '#type' => 'select',
       '#title' => $this->t('Include destination'),
       '#description' => $this->t('Include a "destination" parameter in the link to return the user to the original view upon completing the contextual action.'),
-      '#options' => array(
+      '#options' => [
         '0' => $this->t('No'),
         '1' => $this->t('Yes'),
-      ),
+      ],
       '#default_value' => $this->options['destination'],
-    );
+    ];
   }
 
   /**
@@ -93,7 +93,7 @@ public function preRender(&$values) {
    * @see contextual_contextual_links_view_alter()
    */
   public function render(ResultRow $values) {
-    $links = array();
+    $links = [];
     foreach ($this->options['fields'] as $field) {
       $rendered_field = $this->view->style_plugin->getField($values->index, $field);
       if (empty($rendered_field)) {
@@ -109,13 +109,13 @@ public function render(ResultRow $values) {
       }
       if (!empty($title) && !empty($path)) {
         // Make sure that tokens are replaced for this paths as well.
-        $tokens = $this->getRenderTokens(array());
+        $tokens = $this->getRenderTokens([]);
         $path = strip_tags(Html::decodeEntities(strtr($path, $tokens)));
 
-        $links[$field] = array(
+        $links[$field] = [
           'href' => $path,
           'title' => $title,
-        );
+        ];
         if (!empty($this->options['destination'])) {
           $links[$field]['query'] = $this->getDestinationArray();
         }
@@ -124,20 +124,20 @@ public function render(ResultRow $values) {
 
     // Renders a contextual links placeholder.
     if (!empty($links)) {
-      $contextual_links = array(
-        'contextual' => array(
+      $contextual_links = [
+        'contextual' => [
           '',
-          array(),
-          array(
+          [],
+          [
             'contextual-views-field-links' => UrlHelper::encodePath(Json::encode($links)),
-          )
-        )
-      );
+          ]
+        ]
+      ];
 
-      $element = array(
+      $element = [
         '#type' => 'contextual_links_placeholder',
         '#id' => _contextual_links_to_id($contextual_links),
-      );
+      ];
       return drupal_render($element);
     }
     else {
diff --git a/core/modules/contextual/src/Tests/ContextualDynamicContextTest.php b/core/modules/contextual/src/Tests/ContextualDynamicContextTest.php
index e5d2c85469e5b79028ffa26939c36aaf6b32aaf8..e2c57fc1681447ebbcee22df48700719dd0c52f6 100644
--- a/core/modules/contextual/src/Tests/ContextualDynamicContextTest.php
+++ b/core/modules/contextual/src/Tests/ContextualDynamicContextTest.php
@@ -42,20 +42,20 @@ class ContextualDynamicContextTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('contextual', 'node', 'views', 'views_ui', 'language', 'menu_test');
+  public static $modules = ['contextual', 'node', 'views', 'views_ui', 'language', 'menu_test'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
 
     ConfigurableLanguage::createFromLangcode('it')->save();
     $this->rebuildContainer();
 
-    $this->editorUser = $this->drupalCreateUser(array('access content', 'access contextual links', 'edit any article content'));
-    $this->authenticatedUser = $this->drupalCreateUser(array('access content', 'access contextual links'));
-    $this->anonymousUser = $this->drupalCreateUser(array('access content'));
+    $this->editorUser = $this->drupalCreateUser(['access content', 'access contextual links', 'edit any article content']);
+    $this->authenticatedUser = $this->drupalCreateUser(['access content', 'access contextual links']);
+    $this->anonymousUser = $this->drupalCreateUser(['access content']);
   }
 
   /**
@@ -71,9 +71,9 @@ function testDifferentPermissions() {
     // - An article, which should be user-editable.
     // - A page, which should not be user-editable.
     // - A second article, which should also be user-editable.
-    $node1 = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
-    $node2 = $this->drupalCreateNode(array('type' => 'page', 'promote' => 1));
-    $node3 = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
+    $node1 = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
+    $node2 = $this->drupalCreateNode(['type' => 'page', 'promote' => 1]);
+    $node3 = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
 
     // Now, on the front page, all article nodes should have contextual links
     // placeholders, as should the view that contains them.
@@ -89,7 +89,7 @@ function testDifferentPermissions() {
     for ($i = 0; $i < count($ids); $i++) {
       $this->assertContextualLinkPlaceHolder($ids[$i]);
     }
-    $this->renderContextualLinks(array(), 'node');
+    $this->renderContextualLinks([], 'node');
     $this->assertResponse(400);
     $this->assertRaw('No contextual ids specified.');
     $response = $this->renderContextualLinks($ids, 'node');
@@ -112,7 +112,7 @@ function testDifferentPermissions() {
     for ($i = 0; $i < count($ids); $i++) {
       $this->assertContextualLinkPlaceHolder($ids[$i]);
     }
-    $this->renderContextualLinks(array(), 'node');
+    $this->renderContextualLinks([], 'node');
     $this->assertResponse(400);
     $this->assertRaw('No contextual ids specified.');
     $response = $this->renderContextualLinks($ids, 'node');
@@ -129,7 +129,7 @@ function testDifferentPermissions() {
     for ($i = 0; $i < count($ids); $i++) {
       $this->assertNoContextualLinkPlaceHolder($ids[$i]);
     }
-    $this->renderContextualLinks(array(), 'node');
+    $this->renderContextualLinks([], 'node');
     $this->assertResponse(403);
     $this->renderContextualLinks($ids, 'node');
     $this->assertResponse(403);
@@ -150,7 +150,7 @@ function testDifferentPermissions() {
    *   The result of the assertion.
    */
   protected function assertContextualLinkPlaceHolder($id) {
-    return $this->assertRaw('<div' . new Attribute(array('data-contextual-id' => $id)) . '></div>', format_string('Contextual link placeholder with id @id exists.', array('@id' => $id)));
+    return $this->assertRaw('<div' . new Attribute(['data-contextual-id' => $id]) . '></div>', format_string('Contextual link placeholder with id @id exists.', ['@id' => $id]));
   }
 
   /**
@@ -163,7 +163,7 @@ protected function assertContextualLinkPlaceHolder($id) {
    *   The result of the assertion.
    */
   protected function assertNoContextualLinkPlaceHolder($id) {
-    return $this->assertNoRaw('<div' . new Attribute(array('data-contextual-id' => $id)) . '></div>', format_string('Contextual link placeholder with id @id does not exist.', array('@id' => $id)));
+    return $this->assertNoRaw('<div' . new Attribute(['data-contextual-id' => $id]) . '></div>', format_string('Contextual link placeholder with id @id does not exist.', ['@id' => $id]));
   }
 
   /**
@@ -178,11 +178,11 @@ protected function assertNoContextualLinkPlaceHolder($id) {
    *   The response body.
    */
   protected function renderContextualLinks($ids, $current_path) {
-    $post = array();
+    $post = [];
     for ($i = 0; $i < count($ids); $i++) {
       $post['ids[' . $i . ']'] = $ids[$i];
     }
-    return $this->drupalPostWithFormat('contextual/render', 'json', $post, array('query' => array('destination' => $current_path)));
+    return $this->drupalPostWithFormat('contextual/render', 'json', $post, ['query' => ['destination' => $current_path]]);
   }
 
 }
diff --git a/core/modules/contextual/tests/src/Kernel/ContextualUnitTest.php b/core/modules/contextual/tests/src/Kernel/ContextualUnitTest.php
index 680303db322e42d14b0a6dd0e439f957cb70f08d..1d86da06f091f9a17d3b0ff41a5e523334627940 100644
--- a/core/modules/contextual/tests/src/Kernel/ContextualUnitTest.php
+++ b/core/modules/contextual/tests/src/Kernel/ContextualUnitTest.php
@@ -17,7 +17,7 @@ class ContextualUnitTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('contextual');
+  public static $modules = ['contextual'];
 
   /**
    * Provides testcases for testContextualLinksToId() and
@@ -27,82 +27,82 @@ function _contextual_links_id_testcases() {
     // - one group.
     // - one dynamic path argument.
     // - no metadata.
-    $tests[] = array(
-      'links' => array(
-        'node' => array(
-          'route_parameters' => array(
+    $tests[] = [
+      'links' => [
+        'node' => [
+          'route_parameters' => [
             'node' => '14031991',
-          ),
-          'metadata' => array('langcode' => 'en'),
-        ),
-      ),
+          ],
+          'metadata' => ['langcode' => 'en'],
+        ],
+      ],
       'id' => 'node:node=14031991:langcode=en',
-    );
+    ];
 
     // Test branch conditions:
     // - one group.
     // - multiple dynamic path arguments.
     // - no metadata.
-    $tests[] = array(
-      'links' => array(
-        'foo' => array(
-          'route_parameters' => array(
+    $tests[] = [
+      'links' => [
+        'foo' => [
+          'route_parameters' => [
             'bar',
             'key' => 'baz',
             'qux',
-          ),
-          'metadata' => array('langcode' => 'en'),
-        ),
-      ),
+          ],
+          'metadata' => ['langcode' => 'en'],
+        ],
+      ],
       'id' => 'foo:0=bar&key=baz&1=qux:langcode=en',
-    );
+    ];
 
     // Test branch conditions:
     // - one group.
     // - one dynamic path argument.
     // - metadata.
-    $tests[] = array(
-      'links' => array(
-        'views_ui_edit' => array(
-          'route_parameters' => array(
+    $tests[] = [
+      'links' => [
+        'views_ui_edit' => [
+          'route_parameters' => [
             'view' => 'frontpage'
-          ),
-          'metadata' => array(
+          ],
+          'metadata' => [
             'location' => 'page',
             'display' => 'page_1',
             'langcode' => 'en',
-          ),
-        ),
-      ),
+          ],
+        ],
+      ],
       'id' => 'views_ui_edit:view=frontpage:location=page&display=page_1&langcode=en',
-    );
+    ];
 
     // Test branch conditions:
     // - multiple groups.
     // - multiple dynamic path arguments.
-    $tests[] = array(
-      'links' => array(
-        'node' => array(
-          'route_parameters' => array(
+    $tests[] = [
+      'links' => [
+        'node' => [
+          'route_parameters' => [
             'node' => '14031991',
-          ),
-          'metadata' => array('langcode' => 'en'),
-        ),
-        'foo' => array(
-          'route_parameters' => array(
+          ],
+          'metadata' => ['langcode' => 'en'],
+        ],
+        'foo' => [
+          'route_parameters' => [
             'bar',
             'key' => 'baz',
             'qux',
-          ),
-          'metadata' => array('langcode' => 'en'),
-        ),
-        'edge' => array(
-          'route_parameters' => array('20011988'),
-          'metadata' => array('langcode' => 'en'),
-        ),
-      ),
+          ],
+          'metadata' => ['langcode' => 'en'],
+        ],
+        'edge' => [
+          'route_parameters' => ['20011988'],
+          'metadata' => ['langcode' => 'en'],
+        ],
+      ],
       'id' => 'node:node=14031991:langcode=en|foo:0=bar&key=baz&1=qux:langcode=en|edge:0=20011988:langcode=en',
-    );
+    ];
 
     return $tests;
   }
diff --git a/core/modules/datetime/datetime.module b/core/modules/datetime/datetime.module
index 107854199276ca00c750b05363dc73ea6b44ccac..bb10d13a6ceb0068be1ca80542ef22cd05321337 100644
--- a/core/modules/datetime/datetime.module
+++ b/core/modules/datetime/datetime.module
@@ -30,13 +30,13 @@ function datetime_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.datetime':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Datetime module provides a Date field that stores dates and times. It also provides the Form API elements <em>datetime</em> and <em>datelist</em> for use in programming modules. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI module help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":datetime_do">online documentation for the Datetime module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':datetime_do' => 'https://www.drupal.org/documentation/modules/datetime')) . '</p>';
+      $output .= '<p>' . t('The Datetime module provides a Date field that stores dates and times. It also provides the Form API elements <em>datetime</em> and <em>datelist</em> for use in programming modules. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI module help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":datetime_do">online documentation for the Datetime module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':datetime_do' => 'https://www.drupal.org/documentation/modules/datetime']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing and displaying date fields') . '</dt>';
-      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the Date field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the Date field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Displaying dates') . '</dt>';
-      $output .= '<dd>' . t('Dates can be displayed using the <em>Plain</em> or the <em>Default</em> formatter. The <em>Plain</em> formatter displays the date in the <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a> format. If you choose the <em>Default</em> formatter, you can choose a format from a predefined list that can be managed on the <a href=":date_format_list">Date and time formats</a> page.', array(':date_format_list' => \Drupal::url('entity.date_format.collection'))) . '</dd>';
+      $output .= '<dd>' . t('Dates can be displayed using the <em>Plain</em> or the <em>Default</em> formatter. The <em>Plain</em> formatter displays the date in the <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a> format. If you choose the <em>Default</em> formatter, you can choose a format from a predefined list that can be managed on the <a href=":date_format_list">Date and time formats</a> page.', [':date_format_list' => \Drupal::url('entity.date_format.collection')]) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeCustomFormatter.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeCustomFormatter.php
index fe5fa752e325cbb3513ab7a2370e0390e4f12995..984423d07f53d06fbbc1bc0fda52a37099e17072 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeCustomFormatter.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeCustomFormatter.php
@@ -23,9 +23,9 @@ class DateTimeCustomFormatter extends DateTimeFormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'date_format' => DATETIME_DATETIME_STORAGE_FORMAT,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -35,7 +35,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
     // @todo Evaluate removing this method in
     // https://www.drupal.org/node/2793143 to determine if the behavior and
     // markup in the base class implementation can be used instead.
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
       if (!empty($item->date)) {
@@ -64,12 +64,12 @@ protected function formatDate($date) {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $form = parent::settingsForm($form, $form_state);
 
-    $form['date_format'] = array(
+    $form['date_format'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Date/time format'),
       '#description' => $this->t('See <a href="http://php.net/manual/function.date.php" target="_blank">the documentation for PHP date formats</a>.'),
       '#default_value' => $this->getSetting('date_format'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php
index 8f703fbc9ed696f7734cdd51dec8b63fe3e6d93e..0b75b4e57aefac491dcafb323b161a66148272f9 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php
@@ -22,9 +22,9 @@ class DateTimeDefaultFormatter extends DateTimeFormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'format_type' => 'medium',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -50,13 +50,13 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
       $options[$type] = $type_info->label() . ' (' . $format . ')';
     }
 
-    $form['format_type'] = array(
+    $form['format_type'] = [
       '#type' => 'select',
       '#title' => t('Date format'),
       '#description' => t("Choose a format for displaying the date. Be sure to set a format appropriate for the field, i.e. omitting time for a field that only has a date."),
       '#options' => $options,
       '#default_value' => $this->getSetting('format_type'),
-    );
+    ];
 
     return $form;
   }
@@ -68,7 +68,7 @@ public function settingsSummary() {
     $summary = parent::settingsSummary();
 
     $date = new DrupalDateTime();
-    $summary[] = t('Format: @display', array('@display' => $this->formatDate($date, $this->getFormatSettings())));
+    $summary[] = t('Format: @display', ['@display' => $this->formatDate($date, $this->getFormatSettings())]);
 
     return $summary;
   }
diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeFormatterBase.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeFormatterBase.php
index 22e5aa830aeb3f3aa0c64e7706f83ef9ca338453..71b94670f4de320354ac852a3ae8586e62a67fde 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeFormatterBase.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeFormatterBase.php
@@ -83,9 +83,9 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'timezone_override' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -94,13 +94,13 @@ public static function defaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $form = parent::settingsForm($form, $form_state);
 
-    $form['timezone_override'] = array(
+    $form['timezone_override'] = [
       '#type' => 'select',
       '#title' => $this->t('Time zone override'),
       '#description' => $this->t('The time zone selected here will always be used'),
       '#options' => system_time_zones(TRUE),
       '#default_value' => $this->getSetting('timezone_override'),
-    );
+    ];
 
     return $form;
   }
@@ -112,7 +112,7 @@ public function settingsSummary() {
     $summary = parent::settingsSummary();
 
     if ($override = $this->getSetting('timezone_override')) {
-      $summary[] = $this->t('Time zone: @timezone', array('@timezone' => $override));
+      $summary[] = $this->t('Time zone: @timezone', ['@timezone' => $override]);
     }
 
     return $summary;
@@ -122,7 +122,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
       if ($item->date) {
diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimePlainFormatter.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimePlainFormatter.php
index 5bb676600fbca863d81e8bd9635abc81c1e483ee..7f0dee2c31dda8d7d2ce335379fbb39f608df8b0 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimePlainFormatter.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimePlainFormatter.php
@@ -22,7 +22,7 @@ class DateTimePlainFormatter extends DateTimeFormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
       if (!empty($item->date)) {
diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeTimeAgoFormatter.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeTimeAgoFormatter.php
index 859ea5da72c93328b9f33b7f070b47f818d4f13c..3fc315761674b7fd18b37004285545aae4393eb1 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeTimeAgoFormatter.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeTimeAgoFormatter.php
@@ -74,11 +74,11 @@ public function __construct($plugin_id, $plugin_definition, FieldDefinitionInter
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    $settings = array(
+    $settings = [
       'future_format' => '@interval hence',
       'past_format' => '@interval ago',
       'granularity' => 2,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
 
     return $settings;
   }
@@ -104,7 +104,7 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
       $date = $item->date;
@@ -128,26 +128,26 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $form = parent::settingsForm($form, $form_state);
 
-    $form['future_format'] = array(
+    $form['future_format'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Future format'),
       '#default_value' => $this->getSetting('future_format'),
       '#description' => $this->t('Use <em>@interval</em> where you want the formatted interval text to appear.'),
-    );
+    ];
 
-    $form['past_format'] = array(
+    $form['past_format'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Past format'),
       '#default_value' => $this->getSetting('past_format'),
       '#description' => $this->t('Use <em>@interval</em> where you want the formatted interval text to appear.'),
-    );
+    ];
 
-    $form['granularity'] = array(
+    $form['granularity'] = [
       '#type' => 'number',
       '#title' => $this->t('Granularity'),
       '#default_value' => $this->getSetting('granularity'),
       '#description' => $this->t('How many time units should be shown in the formatted output.'),
-    );
+    ];
 
     return $form;
   }
@@ -160,8 +160,8 @@ public function settingsSummary() {
 
     $future_date = new DrupalDateTime('1 year 1 month 1 week 1 day 1 hour 1 minute');
     $past_date = new DrupalDateTime('-1 year -1 month -1 week -1 day -1 hour -1 minute');
-    $summary[] = t('Future date: %display', array('%display' => $this->formatDate($future_date)));
-    $summary[] = t('Past date: %display', array('%display' => $this->formatDate($past_date)));
+    $summary[] = t('Future date: %display', ['%display' => $this->formatDate($future_date)]);
+    $summary[] = t('Past date: %display', ['%display' => $this->formatDate($past_date)]);
 
     return $summary;
   }
diff --git a/core/modules/datetime/src/Plugin/Field/FieldType/DateTimeFieldItemList.php b/core/modules/datetime/src/Plugin/Field/FieldType/DateTimeFieldItemList.php
index d246011ae2187c44a72b1e9b5f02cfe8ad6b6fe6..45a781b4b983f92038dc4cbb50af75a394fdd9dc 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldType/DateTimeFieldItemList.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldType/DateTimeFieldItemList.php
@@ -30,31 +30,31 @@ public function defaultValuesForm(array &$form, FormStateInterface $form_state)
     if (empty($this->getFieldDefinition()->getDefaultValueCallback())) {
       $default_value = $this->getFieldDefinition()->getDefaultValueLiteral();
 
-      $element = array(
-        '#parents' => array('default_value_input'),
-        'default_date_type' => array(
+      $element = [
+        '#parents' => ['default_value_input'],
+        'default_date_type' => [
           '#type' => 'select',
           '#title' => t('Default date'),
           '#description' => t('Set a default value for this date.'),
           '#default_value' => isset($default_value[0]['default_date_type']) ? $default_value[0]['default_date_type'] : '',
-          '#options' => array(
+          '#options' => [
             static::DEFAULT_VALUE_NOW => t('Current date'),
             static::DEFAULT_VALUE_CUSTOM => t('Relative date'),
-          ),
+          ],
           '#empty_value' => '',
-        ),
-        'default_date' => array(
+        ],
+        'default_date' => [
           '#type' => 'textfield',
           '#title' => t('Relative default value'),
           '#description' => t("Describe a time by reference to the current day, like '+90 days' (90 days from the day the field is created) or '+1 Saturday' (the next Saturday). See <a href=\"http://php.net/manual/function.strtotime.php\">strtotime</a> for more details."),
           '#default_value' => (isset($default_value[0]['default_date_type']) && $default_value[0]['default_date_type'] == static::DEFAULT_VALUE_CUSTOM) ? $default_value[0]['default_date'] : '',
-          '#states' => array(
-            'visible' => array(
-              ':input[id="edit-default-value-input-default-date-type"]' => array('value' => static::DEFAULT_VALUE_CUSTOM),
-            )
-          )
-        )
-      );
+          '#states' => [
+            'visible' => [
+              ':input[id="edit-default-value-input-default-date-type"]' => ['value' => static::DEFAULT_VALUE_CUSTOM],
+            ]
+          ]
+        ]
+      ];
 
       return $element;
     }
@@ -65,7 +65,7 @@ public function defaultValuesForm(array &$form, FormStateInterface $form_state)
    */
   public function defaultValuesFormValidate(array $element, array &$form, FormStateInterface $form_state) {
     if ($form_state->getValue(['default_value_input', 'default_date_type']) == static::DEFAULT_VALUE_CUSTOM) {
-      $is_strtotime = @strtotime($form_state->getValue(array('default_value_input', 'default_date')));
+      $is_strtotime = @strtotime($form_state->getValue(['default_value_input', 'default_date']));
       if (!$is_strtotime) {
         $form_state->setErrorByName('default_value_input][default_date', t('The relative date value entered is invalid.'));
       }
@@ -76,13 +76,13 @@ public function defaultValuesFormValidate(array $element, array &$form, FormStat
    * {@inheritdoc}
    */
   public function defaultValuesFormSubmit(array $element, array &$form, FormStateInterface $form_state) {
-    if ($form_state->getValue(array('default_value_input', 'default_date_type'))) {
-      if ($form_state->getValue(array('default_value_input', 'default_date_type')) == static::DEFAULT_VALUE_NOW) {
+    if ($form_state->getValue(['default_value_input', 'default_date_type'])) {
+      if ($form_state->getValue(['default_value_input', 'default_date_type']) == static::DEFAULT_VALUE_NOW) {
         $form_state->setValueForElement($element['default_date'], static::DEFAULT_VALUE_NOW);
       }
-      return array($form_state->getValue('default_value_input'));
+      return [$form_state->getValue('default_value_input')];
     }
-    return array();
+    return [];
   }
 
   /**
@@ -108,12 +108,12 @@ public static function processDefaultValue($default_value, FieldableEntityInterf
       // We only provide a default value for the first item, as do all fields.
       // Otherwise, there is no way to clear out unwanted values on multiple value
       // fields.
-      $default_value = array(
-        array(
+      $default_value = [
+        [
           'value' => $value,
           'date' => $date,
-        )
-      );
+        ]
+      ];
     }
     return $default_value;
   }
diff --git a/core/modules/datetime/src/Plugin/Field/FieldType/DateTimeItem.php b/core/modules/datetime/src/Plugin/Field/FieldType/DateTimeItem.php
index f07d56409f48a31187bd6994e354d78f850285c5..f5c06e6e5dd7a069bd0ca2c047365f2a36f64d42 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldType/DateTimeItem.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldType/DateTimeItem.php
@@ -26,9 +26,9 @@ class DateTimeItem extends FieldItemBase {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'datetime_type' => 'datetime',
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
@@ -63,37 +63,37 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'description' => 'The date value.',
           'type' => 'varchar',
           'length' => 20,
-        ),
-      ),
-      'indexes' => array(
-        'value' => array('value'),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'value' => ['value'],
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $element = array();
+    $element = [];
 
-    $element['datetime_type'] = array(
+    $element['datetime_type'] = [
       '#type' => 'select',
       '#title' => t('Date type'),
       '#description' => t('Choose the type of date to create.'),
       '#default_value' => $this->getSetting('datetime_type'),
-      '#options' => array(
+      '#options' => [
         static::DATETIME_TYPE_DATETIME => t('Date and time'),
         static::DATETIME_TYPE_DATE => t('Date only'),
-      ),
+      ],
       '#disabled' => $has_data,
-    );
+    ];
 
     return $element;
   }
diff --git a/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDatelistWidget.php b/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDatelistWidget.php
index 06ced059e3f6a9a9d2ac1a1a05e2c4cbeb42499e..d1309767f47e2e459a2a2fc09be4d3b4558fd464 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDatelistWidget.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDatelistWidget.php
@@ -22,11 +22,11 @@ class DateTimeDatelistWidget extends DateTimeWidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'increment' => '15',
       'date_order' => 'YMD',
       'time_type' => '24',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -52,35 +52,35 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     // Set up the date part order array.
     switch ($date_order) {
       case 'YMD':
-        $date_part_order = array('year', 'month', 'day');
+        $date_part_order = ['year', 'month', 'day'];
         break;
 
       case 'MDY':
-        $date_part_order = array('month', 'day', 'year');
+        $date_part_order = ['month', 'day', 'year'];
         break;
 
       case 'DMY':
-        $date_part_order = array('day', 'month', 'year');
+        $date_part_order = ['day', 'month', 'year'];
         break;
     }
     switch ($time_type) {
       case '24':
-        $date_part_order = array_merge($date_part_order, array('hour', 'minute'));
+        $date_part_order = array_merge($date_part_order, ['hour', 'minute']);
         break;
 
       case '12':
-        $date_part_order = array_merge($date_part_order, array('hour', 'minute', 'ampm'));
+        $date_part_order = array_merge($date_part_order, ['hour', 'minute', 'ampm']);
         break;
 
       case 'none':
         break;
     }
 
-    $element['value'] = array(
+    $element['value'] = [
       '#type' => 'datelist',
       '#date_increment' => $increment,
       '#date_part_order' => $date_part_order,
-    ) + $element['value'];
+    ] + $element['value'];
 
     return $element;
   }
@@ -91,20 +91,20 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
   function settingsForm(array $form, FormStateInterface $form_state) {
     $element = parent::settingsForm($form, $form_state);
 
-    $element['date_order'] = array(
+    $element['date_order'] = [
       '#type' => 'select',
       '#title' => t('Date part order'),
       '#default_value' => $this->getSetting('date_order'),
-      '#options' => array('MDY' => t('Month/Day/Year'), 'DMY' => t('Day/Month/Year'), 'YMD' => t('Year/Month/Day')),
-    );
+      '#options' => ['MDY' => t('Month/Day/Year'), 'DMY' => t('Day/Month/Year'), 'YMD' => t('Year/Month/Day')],
+    ];
 
     if ($this->getFieldSetting('datetime_type') == 'datetime') {
-      $element['time_type'] = array(
+      $element['time_type'] = [
         '#type' => 'select',
         '#title' => t('Time type'),
         '#default_value' => $this->getSetting('time_type'),
-        '#options' => array('24' => t('24 hour time'), '12' => t('12 hour time')),
-      );
+        '#options' => ['24' => t('24 hour time'), '12' => t('12 hour time')],
+      ];
 
       $element['increment'] = [
         '#type' => 'select',
@@ -120,10 +120,10 @@ function settingsForm(array $form, FormStateInterface $form_state) {
       ];
     }
     else {
-      $element['time_type'] = array(
+      $element['time_type'] = [
         '#type' => 'hidden',
         '#value' => 'none',
-      );
+      ];
 
       $element['increment'] = [
         '#type' => 'hidden',
@@ -138,12 +138,12 @@ function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
-    $summary[] = t('Date part order: @order', array('@order' => $this->getSetting('date_order')));
+    $summary[] = t('Date part order: @order', ['@order' => $this->getSetting('date_order')]);
     if ($this->getFieldSetting('datetime_type') == 'datetime') {
-      $summary[] = t('Time type: @time_type', array('@time_type' => $this->getSetting('time_type')));
-      $summary[] = t('Time increments: @increment', array('@increment' => $this->getSetting('increment')));
+      $summary[] = t('Time type: @time_type', ['@time_type' => $this->getSetting('time_type')]);
+      $summary[] = t('Time increments: @increment', ['@increment' => $this->getSetting('increment')]);
     }
 
     return $summary;
diff --git a/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDefaultWidget.php b/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDefaultWidget.php
index 6d03ffd418032ee8f08e5fae7d1d76bbe304c3b1..2a4ffcd297500eefac942150c0b200e35dd62166 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDefaultWidget.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDefaultWidget.php
@@ -86,14 +86,14 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
         break;
     }
 
-    $element['value'] += array(
+    $element['value'] += [
       '#date_date_format' => $date_format,
       '#date_date_element' => $date_type,
-      '#date_date_callbacks' => array(),
+      '#date_date_callbacks' => [],
       '#date_time_format' => $time_format,
       '#date_time_element' => $time_type,
-      '#date_time_callbacks' => array(),
-    );
+      '#date_time_callbacks' => [],
+    ];
 
     return $element;
   }
diff --git a/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeWidgetBase.php b/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeWidgetBase.php
index b363eed8adc94e7e25060a9419d42f56d0f89efc..f965e218489ac766e24e62e7ff04f038d4fdb7ff 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeWidgetBase.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeWidgetBase.php
@@ -17,13 +17,13 @@ class DateTimeWidgetBase extends WidgetBase {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element['value'] = array(
+    $element['value'] = [
       '#type' => 'datetime',
       '#default_value' => NULL,
       '#date_increment' => 1,
       '#date_timezone' => drupal_get_user_timezone(),
       '#required' => $element['#required'],
-    );
+    ];
 
     if ($this->getFieldSetting('datetime_type') == DateTimeItem::DATETIME_TYPE_DATE) {
       // A date-only field should have no timezone conversion performed, so
diff --git a/core/modules/datetime/src/Tests/DateTimeFieldTest.php b/core/modules/datetime/src/Tests/DateTimeFieldTest.php
index 67e5183ccdf82c9f2ce8aa31639a8b2a925c3a5a..aeed9bc7a0c242e09c44fd8d3462df2ffe40f319 100644
--- a/core/modules/datetime/src/Tests/DateTimeFieldTest.php
+++ b/core/modules/datetime/src/Tests/DateTimeFieldTest.php
@@ -63,13 +63,13 @@ function testDateField() {
       $date_format = DateFormat::load('html_date')->getPattern();
       $time_format = DateFormat::load('html_time')->getPattern();
 
-      $edit = array(
+      $edit = [
         "{$field_name}[0][value][date]" => $date->format($date_format),
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save'));
       preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
       $id = $match[1];
-      $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+      $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
       $this->assertRaw($date->format($date_format));
       $this->assertNoRaw($date->format($time_format));
 
@@ -87,15 +87,15 @@ function testDateField() {
       $this->assertEqual('2012-12-31', $entity->{$field_name}->value);
 
       // Reset display options since these get changed below.
-      $this->displayOptions = array(
+      $this->displayOptions = [
         'type' => 'datetime_default',
         'label' => 'hidden',
-        'settings' => array('format_type' => 'medium') + $this->defaultSettings,
-      );
+        'settings' => ['format_type' => 'medium'] + $this->defaultSettings,
+      ];
       // Verify that the date is output according to the formatter settings.
-      $options = array(
-        'format_type' => array('short', 'medium', 'long'),
-      );
+      $options = [
+        'format_type' => ['short', 'medium', 'long'],
+      ];
       // Formats that display a time component for date-only fields will display
       // the default time, so that is applied before calculating the expected
       // value.
@@ -103,7 +103,7 @@ function testDateField() {
       foreach ($options as $setting => $values) {
         foreach ($values as $new_value) {
           // Update the entity display settings.
-          $this->displayOptions['settings'] = array($setting => $new_value) + $this->defaultSettings;
+          $this->displayOptions['settings'] = [$setting => $new_value] + $this->defaultSettings;
           entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
             ->setComponent($field_name, $this->displayOptions)
             ->save();
@@ -116,7 +116,7 @@ function testDateField() {
               $expected = format_date($date->getTimestamp(), $new_value, '', DATETIME_STORAGE_TIMEZONE);
               $expected_iso = format_date($date->getTimestamp(), 'custom', 'Y-m-d\TH:i:s\Z', DATETIME_STORAGE_TIMEZONE);
               $this->renderTestEntity($id);
-              $this->assertFieldByXPath('//time[@datetime="' . $expected_iso . '"]', $expected, SafeMarkup::format('Formatted date field using %value format displayed as %expected with %expected_iso attribute.', array('%value' => $new_value, '%expected' => $expected, '%expected_iso' => $expected_iso)));
+              $this->assertFieldByXPath('//time[@datetime="' . $expected_iso . '"]', $expected, SafeMarkup::format('Formatted date field using %value format displayed as %expected with %expected_iso attribute.', ['%value' => $new_value, '%expected' => $expected, '%expected_iso' => $expected_iso]));
               break;
           }
         }
@@ -130,17 +130,17 @@ function testDateField() {
         ->save();
       $expected = $date->format(DATETIME_DATE_STORAGE_FORMAT);
       $this->renderTestEntity($id);
-      $this->assertText($expected, SafeMarkup::format('Formatted date field using plain format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertText($expected, SafeMarkup::format('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));
 
       // Verify that the 'datetime_custom' formatter works.
       $this->displayOptions['type'] = 'datetime_custom';
-      $this->displayOptions['settings'] = array('date_format' => 'm/d/Y') + $this->defaultSettings;
+      $this->displayOptions['settings'] = ['date_format' => 'm/d/Y'] + $this->defaultSettings;
       entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
         ->setComponent($field_name, $this->displayOptions)
         ->save();
       $expected = $date->format($this->displayOptions['settings']['date_format']);
       $this->renderTestEntity($id);
-      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', ['%expected' => $expected]));
 
       // Test that allowed markup in custom format is preserved and XSS is
       // removed.
@@ -150,7 +150,7 @@ function testDateField() {
         ->save();
       $expected = '<strong>' . $date->format('m/d/Y') . '</strong>alert(String.fromCharCode(88,83,83))';
       $this->renderTestEntity($id);
-      $this->assertRaw($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertRaw($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
 
       // Verify that the 'datetime_time_ago' formatter works for intervals in the
       // past.  First update the test entity so that the date difference always
@@ -165,11 +165,11 @@ function testDateField() {
       $entity->save();
 
       $this->displayOptions['type'] = 'datetime_time_ago';
-      $this->displayOptions['settings'] = array(
+      $this->displayOptions['settings'] = [
         'future_format' => '@interval in the future',
         'past_format' => '@interval in the past',
         'granularity' => 3,
-      );
+      ];
       entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
         ->setComponent($field_name, $this->displayOptions)
         ->save();
@@ -177,7 +177,7 @@ function testDateField() {
         '@interval' => $this->dateFormatter->formatTimeDiffSince($timestamp, ['granularity' => $this->displayOptions['settings']['granularity']])
       ]);
       $this->renderTestEntity($id);
-      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', ['%expected' => $expected]));
 
       // Verify that the 'datetime_time_ago' formatter works for intervals in the
       // future.  First update the test entity so that the date difference always
@@ -198,7 +198,7 @@ function testDateField() {
         '@interval' => $this->dateFormatter->formatTimeDiffUntil($timestamp, ['granularity' => $this->displayOptions['settings']['granularity']])
       ]);
       $this->renderTestEntity($id);
-      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', ['%expected' => $expected]));
     }
   }
 
@@ -230,25 +230,25 @@ function testDatetimeField() {
     $date_format = DateFormat::load('html_date')->getPattern();
     $time_format = DateFormat::load('html_time')->getPattern();
 
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date->format($date_format),
       "{$field_name}[0][value][time]" => $date->format($time_format),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
     $this->assertRaw($date->format($date_format));
     $this->assertRaw($date->format($time_format));
 
     // Verify that the date is output according to the formatter settings.
-    $options = array(
-      'format_type' => array('short', 'medium', 'long'),
-    );
+    $options = [
+      'format_type' => ['short', 'medium', 'long'],
+    ];
     foreach ($options as $setting => $values) {
       foreach ($values as $new_value) {
         // Update the entity display settings.
-        $this->displayOptions['settings'] = array($setting => $new_value) + $this->defaultSettings;
+        $this->displayOptions['settings'] = [$setting => $new_value] + $this->defaultSettings;
         entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
           ->setComponent($field_name, $this->displayOptions)
           ->save();
@@ -260,7 +260,7 @@ function testDatetimeField() {
             $expected = format_date($date->getTimestamp(), $new_value);
             $expected_iso = format_date($date->getTimestamp(), 'custom', 'Y-m-d\TH:i:s\Z', 'UTC');
             $this->renderTestEntity($id);
-            $this->assertFieldByXPath('//time[@datetime="' . $expected_iso . '"]', $expected, SafeMarkup::format('Formatted date field using %value format displayed as %expected with %expected_iso attribute.', array('%value' => $new_value, '%expected' => $expected, '%expected_iso' => $expected_iso)));
+            $this->assertFieldByXPath('//time[@datetime="' . $expected_iso . '"]', $expected, SafeMarkup::format('Formatted date field using %value format displayed as %expected with %expected_iso attribute.', ['%value' => $new_value, '%expected' => $expected, '%expected_iso' => $expected_iso]));
             break;
         }
       }
@@ -274,27 +274,27 @@ function testDatetimeField() {
       ->save();
     $expected = $date->format(DATETIME_DATETIME_STORAGE_FORMAT);
     $this->renderTestEntity($id);
-    $this->assertText($expected, SafeMarkup::format('Formatted date field using plain format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, SafeMarkup::format('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));
 
     // Verify that the 'datetime_custom' formatter works.
     $this->displayOptions['type'] = 'datetime_custom';
-    $this->displayOptions['settings'] = array('date_format' => 'm/d/Y g:i:s A') + $this->defaultSettings;
+    $this->displayOptions['settings'] = ['date_format' => 'm/d/Y g:i:s A'] + $this->defaultSettings;
     entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
       ->setComponent($field_name, $this->displayOptions)
       ->save();
     $expected = $date->format($this->displayOptions['settings']['date_format']);
     $this->renderTestEntity($id);
-    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', ['%expected' => $expected]));
 
     // Verify that the 'timezone_override' setting works.
     $this->displayOptions['type'] = 'datetime_custom';
-    $this->displayOptions['settings'] = array('date_format' => 'm/d/Y g:i:s A', 'timezone_override' => 'America/New_York') + $this->defaultSettings;
+    $this->displayOptions['settings'] = ['date_format' => 'm/d/Y g:i:s A', 'timezone_override' => 'America/New_York'] + $this->defaultSettings;
     entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
       ->setComponent($field_name, $this->displayOptions)
       ->save();
-    $expected = $date->format($this->displayOptions['settings']['date_format'], array('timezone' => 'America/New_York'));
+    $expected = $date->format($this->displayOptions['settings']['date_format'], ['timezone' => 'America/New_York']);
     $this->renderTestEntity($id);
-    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', ['%expected' => $expected]));
 
     // Verify that the 'datetime_time_ago' formatter works for intervals in the
     // past.  First update the test entity so that the date difference always
@@ -309,11 +309,11 @@ function testDatetimeField() {
     $entity->save();
 
     $this->displayOptions['type'] = 'datetime_time_ago';
-    $this->displayOptions['settings'] = array(
+    $this->displayOptions['settings'] = [
       'future_format' => '@interval from now',
       'past_format' => '@interval earlier',
       'granularity' => 3,
-    );
+    ];
     entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
       ->setComponent($field_name, $this->displayOptions)
       ->save();
@@ -321,7 +321,7 @@ function testDatetimeField() {
       '@interval' => $this->dateFormatter->formatTimeDiffSince($timestamp, ['granularity' => $this->displayOptions['settings']['granularity']])
     ]);
     $this->renderTestEntity($id);
-    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', ['%expected' => $expected]));
 
     // Verify that the 'datetime_time_ago' formatter works for intervals in the
     // future.  First update the test entity so that the date difference always
@@ -342,7 +342,7 @@ function testDatetimeField() {
       '@interval' => $this->dateFormatter->formatTimeDiffUntil($timestamp, ['granularity' => $this->displayOptions['settings']['granularity']])
     ]);
     $this->renderTestEntity($id);
-    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', ['%expected' => $expected]));
   }
 
   /**
@@ -357,12 +357,12 @@ function testDatelistWidget() {
 
     // Change the widget to a datelist widget.
     entity_get_form_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'datetime_datelist',
-        'settings' => array(
+        'settings' => [
           'date_order' => 'YMD',
-        ),
-      ))
+        ],
+      ])
       ->save();
     \Drupal::entityManager()->clearCachedFieldDefinitions();
 
@@ -381,7 +381,7 @@ function testDatelistWidget() {
     $this->drupalGet($fieldEditUrl);
 
     // Click on the widget settings button to open the widget settings form.
-    $this->drupalPostAjaxForm(NULL, array(), $field_name . "_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], $field_name . "_settings_edit");
     $xpathIncr = "//select[starts-with(@id, \"edit-fields-$field_name-settings-edit-form-settings-increment\")]";
     $this->assertNoFieldByXPath($xpathIncr, NULL, 'Increment element not found for Date Only.');
 
@@ -391,14 +391,14 @@ function testDatelistWidget() {
 
     // Change the widget to a datelist widget.
     entity_get_form_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'datetime_datelist',
-        'settings' => array(
+        'settings' => [
           'increment' => 1,
           'date_order' => 'YMD',
           'time_type' => '12',
-        ),
-      ))
+        ],
+      ])
       ->save();
     \Drupal::entityManager()->clearCachedFieldDefinitions();
 
@@ -407,7 +407,7 @@ function testDatelistWidget() {
     $this->drupalGet($fieldEditUrl);
 
     // Click on the widget settings button to open the widget settings form.
-    $this->drupalPostAjaxForm(NULL, array(), $field_name . "_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], $field_name . "_settings_edit");
     $this->assertFieldByXPath($xpathIncr, NULL, 'Increment element found for Date and time.');
 
     // Display creation form.
@@ -434,9 +434,9 @@ function testDatelistWidget() {
     $this->assertOptionByText("edit-$field_name-0-value-ampm", t('AM/PM'));
 
     // Submit a valid date and ensure it is accepted.
-    $date_value = array('year' => 2012, 'month' => 12, 'day' => 31, 'hour' => 5, 'minute' => 15);
+    $date_value = ['year' => 2012, 'month' => 12, 'day' => 31, 'hour' => 5, 'minute' => 15];
 
-    $edit = array();
+    $edit = [];
     // Add the ampm indicator since we are testing 12 hour time.
     $date_value['ampm'] = 'am';
     foreach ($date_value as $part => $value) {
@@ -446,7 +446,7 @@ function testDatelistWidget() {
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     $this->assertOptionSelected("edit-$field_name-0-value-year", '2012', 'Correct year selected.');
     $this->assertOptionSelected("edit-$field_name-0-value-month", '12', 'Correct month selected.');
@@ -457,14 +457,14 @@ function testDatelistWidget() {
 
     // Test the widget using increment other than 1 and 24 hour mode.
     entity_get_form_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'datetime_datelist',
-        'settings' => array(
+        'settings' => [
           'increment' => 15,
           'date_order' => 'YMD',
           'time_type' => '24',
-        ),
-      ))
+        ],
+      ])
       ->save();
     \Drupal::entityManager()->clearCachedFieldDefinitions();
 
@@ -477,9 +477,9 @@ function testDatelistWidget() {
     $this->assertNoFieldByXPath("//*[@id=\"edit-$field_name-0-value-ampm\"]", NULL, 'AMPM element not found.');
 
     // Submit a valid date and ensure it is accepted.
-    $date_value = array('year' => 2012, 'month' => 12, 'day' => 31, 'hour' => 17, 'minute' => 15);
+    $date_value = ['year' => 2012, 'month' => 12, 'day' => 31, 'hour' => 17, 'minute' => 15];
 
-    $edit = array();
+    $edit = [];
     foreach ($date_value as $part => $value) {
       $edit["{$field_name}[0][value][$part]"] = $value;
     }
@@ -487,7 +487,7 @@ function testDatelistWidget() {
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     $this->assertOptionSelected("edit-$field_name-0-value-year", '2012', 'Correct year selected.');
     $this->assertOptionSelected("edit-$field_name-0-value-month", '12', 'Correct month selected.');
@@ -497,14 +497,14 @@ function testDatelistWidget() {
 
     // Test the widget for partial completion of fields.
     entity_get_form_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'datetime_datelist',
-        'settings' => array(
+        'settings' => [
           'increment' => 1,
           'date_order' => 'YMD',
           'time_type' => '24',
-        ),
-      ))
+        ],
+      ])
       ->save();
     \Drupal::entityManager()->clearCachedFieldDefinitions();
 
@@ -516,7 +516,7 @@ function testDatelistWidget() {
       $this->drupalGet('entity_test/add');
 
       // Submit a partial date and ensure and error message is provided.
-      $edit = array();
+      $edit = [];
       foreach ($date_value as $part => $value) {
         $edit["{$field_name}[0][value][$part]"] = $value;
       }
@@ -531,8 +531,8 @@ function testDatelistWidget() {
     // Test the widget for complete input with zeros as part of selections.
     $this->drupalGet('entity_test/add');
 
-    $date_value = array('year' => 2012, 'month' => '12', 'day' => '31', 'hour' => '0', 'minute' => '0');
-    $edit = array();
+    $date_value = ['year' => 2012, 'month' => '12', 'day' => '31', 'hour' => '0', 'minute' => '0'];
+    $edit = [];
     foreach ($date_value as $part => $value) {
       $edit["{$field_name}[0][value][$part]"] = $value;
     }
@@ -541,13 +541,13 @@ function testDatelistWidget() {
     $this->assertResponse(200);
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     // Test the widget to ensure zeros are not deselected on validation.
     $this->drupalGet('entity_test/add');
 
-    $date_value = array('year' => 2012, 'month' => '12', 'day' => '31', 'hour' => '', 'minute' => '0');
-    $edit = array();
+    $date_value = ['year' => 2012, 'month' => '12', 'day' => '31', 'hour' => '', 'minute' => '0'];
+    $edit = [];
     foreach ($date_value as $part => $value) {
       $edit["{$field_name}[0][value][$part]"] = $value;
     }
@@ -595,16 +595,16 @@ protected function datelistDataProvider() {
    */
   function testDefaultValue() {
     // Create a test content type.
-    $this->drupalCreateContentType(array('type' => 'date_content'));
+    $this->drupalCreateContentType(['type' => 'date_content']);
 
     // Create a field storage with settings to validate.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'type' => 'datetime',
-      'settings' => array('datetime_type' => 'date'),
-    ));
+      'settings' => ['datetime_type' => 'date'],
+    ]);
     $field_storage->save();
 
     $field = FieldConfig::create([
@@ -620,9 +620,9 @@ function testDefaultValue() {
       $this->setSiteTimezone($timezone);
 
       // Set now as default_value.
-      $field_edit = array(
+      $field_edit = [
         'default_value_input[default_date_type]' => 'now',
-      );
+      ];
       $this->drupalPostForm('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name, $field_edit, t('Save settings'));
 
       // Check that default value is selected in default value form.
@@ -633,10 +633,10 @@ function testDefaultValue() {
       // Check if default_date has been stored successfully.
       $config_entity = $this->config('field.field.node.date_content.' . $field_name)
         ->get();
-      $this->assertEqual($config_entity['default_value'][0], array(
+      $this->assertEqual($config_entity['default_value'][0], [
         'default_date_type' => 'now',
         'default_date' => 'now',
-      ), 'Default value has been stored successfully');
+      ], 'Default value has been stored successfully');
 
       // Clear field cache in order to avoid stale cache values.
       \Drupal::entityManager()->clearCachedFieldDefinitions();
@@ -648,19 +648,19 @@ function testDefaultValue() {
         ->offsetGet(0)->value, $expected_date->format(DATETIME_DATE_STORAGE_FORMAT));
 
       // Set an invalid relative default_value to test validation.
-      $field_edit = array(
+      $field_edit = [
         'default_value_input[default_date_type]' => 'relative',
         'default_value_input[default_date]' => 'invalid date',
-      );
+      ];
       $this->drupalPostForm('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name, $field_edit, t('Save settings'));
 
       $this->assertText('The relative date value entered is invalid.');
 
       // Set a relative default_value.
-      $field_edit = array(
+      $field_edit = [
         'default_value_input[default_date_type]' => 'relative',
         'default_value_input[default_date]' => '+90 days',
-      );
+      ];
       $this->drupalPostForm('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name, $field_edit, t('Save settings'));
 
       // Check that default value is selected in default value form.
@@ -671,10 +671,10 @@ function testDefaultValue() {
       // Check if default_date has been stored successfully.
       $config_entity = $this->config('field.field.node.date_content.' . $field_name)
         ->get();
-      $this->assertEqual($config_entity['default_value'][0], array(
+      $this->assertEqual($config_entity['default_value'][0], [
         'default_date_type' => 'relative',
         'default_date' => '+90 days',
-      ), 'Default value has been stored successfully');
+      ], 'Default value has been stored successfully');
 
       // Clear field cache in order to avoid stale cache values.
       \Drupal::entityManager()->clearCachedFieldDefinitions();
@@ -687,9 +687,9 @@ function testDefaultValue() {
         ->offsetGet(0)->value, $expected_date->format(DATETIME_DATE_STORAGE_FORMAT));
 
       // Remove default value.
-      $field_edit = array(
+      $field_edit = [
         'default_value_input[default_date_type]' => '',
-      );
+      ];
       $this->drupalPostForm('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name, $field_edit, t('Save settings'));
 
       // Check that default value is selected in default value form.
@@ -728,72 +728,72 @@ function testInvalidField() {
 
     // Submit invalid dates and ensure they is not accepted.
     $date_value = '';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date_value,
       "{$field_name}[0][value][time]" => '12:00:00',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertText('date is invalid', 'Empty date value has been caught.');
 
     $date_value = 'aaaa-12-01';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date_value,
       "{$field_name}[0][value][time]" => '00:00:00',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid year value %date has been caught.', array('%date' => $date_value)));
+    $this->assertText('date is invalid', format_string('Invalid year value %date has been caught.', ['%date' => $date_value]));
 
     $date_value = '2012-75-01';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date_value,
       "{$field_name}[0][value][time]" => '00:00:00',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid month value %date has been caught.', array('%date' => $date_value)));
+    $this->assertText('date is invalid', format_string('Invalid month value %date has been caught.', ['%date' => $date_value]));
 
     $date_value = '2012-12-99';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date_value,
       "{$field_name}[0][value][time]" => '00:00:00',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid day value %date has been caught.', array('%date' => $date_value)));
+    $this->assertText('date is invalid', format_string('Invalid day value %date has been caught.', ['%date' => $date_value]));
 
     $date_value = '2012-12-01';
     $time_value = '';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date_value,
       "{$field_name}[0][value][time]" => $time_value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertText('date is invalid', 'Empty time value has been caught.');
 
     $date_value = '2012-12-01';
     $time_value = '49:00:00';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date_value,
       "{$field_name}[0][value][time]" => $time_value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid hour value %time has been caught.', array('%time' => $time_value)));
+    $this->assertText('date is invalid', format_string('Invalid hour value %time has been caught.', ['%time' => $time_value]));
 
     $date_value = '2012-12-01';
     $time_value = '12:99:00';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date_value,
       "{$field_name}[0][value][time]" => $time_value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid minute value %time has been caught.', array('%time' => $time_value)));
+    $this->assertText('date is invalid', format_string('Invalid minute value %time has been caught.', ['%time' => $time_value]));
 
     $date_value = '2012-12-01';
     $time_value = '12:15:99';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $date_value,
       "{$field_name}[0][value][time]" => $time_value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid second value %time has been caught.', array('%time' => $time_value)));
+    $this->assertText('date is invalid', format_string('Invalid second value %time has been caught.', ['%time' => $time_value]));
   }
 
   /**
diff --git a/core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php b/core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php
index 424cbd98c67b4f8511dc9de7eb427ae7827a7ca8..e28667f0725f86bb947228371d5f5d7be410404a 100644
--- a/core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php
+++ b/core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php
@@ -36,25 +36,25 @@ class DateTimeItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('datetime');
+  public static $modules = ['datetime'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create a field with settings to validate.
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => 'field_datetime',
       'type' => 'datetime',
       'entity_type' => 'entity_test',
-      'settings' => array('datetime_type' => DateTimeItem::DATETIME_TYPE_DATETIME),
-    ));
+      'settings' => ['datetime_type' => DateTimeItem::DATETIME_TYPE_DATETIME],
+    ]);
     $this->fieldStorage->save();
     $this->field = FieldConfig::create([
       'field_storage' => $this->fieldStorage,
       'bundle' => 'entity_test',
-      'settings' => array(
+      'settings' => [
         'default_value' => 'blank',
-      ),
+      ],
     ]);
     $this->field->save();
   }
diff --git a/core/modules/datetime_range/datetime_range.module b/core/modules/datetime_range/datetime_range.module
index ceeb99dd8a50a72bbe18e46088f6bed30a5497f4..b2b87dae7ae2c960232bf44d2d01feaaed4e185f 100644
--- a/core/modules/datetime_range/datetime_range.module
+++ b/core/modules/datetime_range/datetime_range.module
@@ -15,13 +15,13 @@ function datetime_range_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.datetime_range':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Datetime Range module provides a Date field that stores start dates and times, as well as end dates and times. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI module help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":datetime_do">online documentation for the Datetime Range module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':datetime_do' => 'https://www.drupal.org/documentation/modules/datetime_range')) . '</p>';
+      $output .= '<p>' . t('The Datetime Range module provides a Date field that stores start dates and times, as well as end dates and times. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI module help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":datetime_do">online documentation for the Datetime Range module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':datetime_do' => 'https://www.drupal.org/documentation/modules/datetime_range']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing and displaying date fields') . '</dt>';
-      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the Date field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the Date field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Displaying dates') . '</dt>';
-      $output .= '<dd>' . t('Dates can be displayed using the <em>Plain</em> or the <em>Default</em> formatter. The <em>Plain</em> formatter displays the date in the <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a> format. If you choose the <em>Default</em> formatter, you can choose a format from a predefined list that can be managed on the <a href=":date_format_list">Date and time formats</a> page.', array(':date_format_list' => \Drupal::url('entity.date_format.collection'))) . '</dd>';
+      $output .= '<dd>' . t('Dates can be displayed using the <em>Plain</em> or the <em>Default</em> formatter. The <em>Plain</em> formatter displays the date in the <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a> format. If you choose the <em>Default</em> formatter, you can choose a format from a predefined list that can be managed on the <a href=":date_format_list">Date and time formats</a> page.', [':date_format_list' => \Drupal::url('entity.date_format.collection')]) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
diff --git a/core/modules/datetime_range/src/Tests/DateRangeFieldTest.php b/core/modules/datetime_range/src/Tests/DateRangeFieldTest.php
index b2d259ad41cbf2d72a32b8f5b6645fddac0ebc1e..f5533150ee5e39af0ebfc2529e0b78405497116c 100644
--- a/core/modules/datetime_range/src/Tests/DateRangeFieldTest.php
+++ b/core/modules/datetime_range/src/Tests/DateRangeFieldTest.php
@@ -78,14 +78,14 @@ public function testDateRangeField() {
       $date_format = DateFormat::load('html_date')->getPattern();
       $time_format = DateFormat::load('html_time')->getPattern();
 
-      $edit = array(
+      $edit = [
         "{$field_name}[0][value][date]" => $start_date->format($date_format),
         "{$field_name}[0][end_value][date]" => $end_date->format($date_format),
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save'));
       preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
       $id = $match[1];
-      $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+      $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
       $this->assertRaw($start_date->format($date_format));
       $this->assertNoRaw($start_date->format($time_format));
       $this->assertRaw($end_date->format($date_format));
@@ -156,17 +156,17 @@ public function testDateRangeField() {
         ->save();
       $expected = $start_date->format(DATETIME_DATE_STORAGE_FORMAT) . ' - ' . $end_date->format(DATETIME_DATE_STORAGE_FORMAT);
       $this->renderTestEntity($id);
-      $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));
 
       // Verify that the custom formatter works.
       $this->displayOptions['type'] = 'daterange_custom';
-      $this->displayOptions['settings'] = array('date_format' => 'm/d/Y') + $this->defaultSettings;
+      $this->displayOptions['settings'] = ['date_format' => 'm/d/Y'] + $this->defaultSettings;
       entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
         ->setComponent($field_name, $this->displayOptions)
         ->save();
       $expected = $start_date->format($this->displayOptions['settings']['date_format']) . ' - ' . $end_date->format($this->displayOptions['settings']['date_format']);
       $this->renderTestEntity($id);
-      $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
 
       // Test that allowed markup in custom format is preserved and XSS is
       // removed.
@@ -176,7 +176,7 @@ public function testDateRangeField() {
         ->save();
       $expected = '<strong>' . $start_date->format('m/d/Y') . '</strong>alert(String.fromCharCode(88,83,83)) - <strong>' . $end_date->format('m/d/Y') . '</strong>alert(String.fromCharCode(88,83,83))';
       $this->renderTestEntity($id);
-      $this->assertRaw($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertRaw($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
 
       // Test formatters when start date and end date are the same
       $this->drupalGet('entity_test/add');
@@ -186,15 +186,15 @@ public function testDateRangeField() {
       $date_format = DateFormat::load('html_date')->getPattern();
       $time_format = DateFormat::load('html_time')->getPattern();
 
-      $edit = array(
+      $edit = [
         "{$field_name}[0][value][date]" => $start_date->format($date_format),
         "{$field_name}[0][end_value][date]" => $start_date->format($date_format),
-      );
+      ];
 
       $this->drupalPostForm(NULL, $edit, t('Save'));
       preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
       $id = $match[1];
-      $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+      $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
       datetime_date_default_time($start_date);
 
@@ -233,17 +233,17 @@ public function testDateRangeField() {
         ->save();
       $expected = $start_date->format(DATETIME_DATE_STORAGE_FORMAT);
       $this->renderTestEntity($id);
-      $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));
       $this->assertNoText(' THESEPARATOR ', 'Separator not found on page');
 
       $this->displayOptions['type'] = 'daterange_custom';
-      $this->displayOptions['settings'] = array('date_format' => 'm/d/Y') + $this->defaultSettings;
+      $this->displayOptions['settings'] = ['date_format' => 'm/d/Y'] + $this->defaultSettings;
       entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
         ->setComponent($field_name, $this->displayOptions)
         ->save();
       $expected = $start_date->format($this->displayOptions['settings']['date_format']);
       $this->renderTestEntity($id);
-      $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+      $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
       $this->assertNoText(' THESEPARATOR ', 'Separator not found on page');
     }
   }
@@ -282,16 +282,16 @@ public function testDatetimeRangeField() {
     $date_format = DateFormat::load('html_date')->getPattern();
     $time_format = DateFormat::load('html_time')->getPattern();
 
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $start_date->format($date_format),
       "{$field_name}[0][value][time]" => $start_date->format($time_format),
       "{$field_name}[0][end_value][date]" => $end_date->format($date_format),
       "{$field_name}[0][end_value][time]" => $end_date->format($time_format),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
     $this->assertRaw($start_date->format($date_format));
     $this->assertRaw($start_date->format($time_format));
     $this->assertRaw($end_date->format($date_format));
@@ -328,7 +328,7 @@ public function testDatetimeRangeField() {
       ->save();
     $expected = $start_date->format(DATETIME_DATETIME_STORAGE_FORMAT) . ' - ' . $end_date->format(DATETIME_DATETIME_STORAGE_FORMAT);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));
 
     // Verify that the 'datetime_custom' formatter works.
     $this->displayOptions['type'] = 'daterange_custom';
@@ -338,7 +338,7 @@ public function testDatetimeRangeField() {
       ->save();
     $expected = $start_date->format($this->displayOptions['settings']['date_format']) . ' - ' . $end_date->format($this->displayOptions['settings']['date_format']);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
 
     // Verify that the 'timezone_override' setting works.
     $this->displayOptions['type'] = 'daterange_custom';
@@ -349,7 +349,7 @@ public function testDatetimeRangeField() {
     $expected = $start_date->format($this->displayOptions['settings']['date_format'], ['timezone' => 'America/New_York']);
     $expected .= ' - ' . $end_date->format($this->displayOptions['settings']['date_format'], ['timezone' => 'America/New_York']);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
 
     // Test formatters when start date and end date are the same
     $this->drupalGet('entity_test/add');
@@ -360,17 +360,17 @@ public function testDatetimeRangeField() {
     $date_format = DateFormat::load('html_date')->getPattern();
     $time_format = DateFormat::load('html_time')->getPattern();
 
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $start_date->format($date_format),
       "{$field_name}[0][value][time]" => $start_date->format($time_format),
       "{$field_name}[0][end_value][date]" => $start_date->format($date_format),
       "{$field_name}[0][end_value][time]" => $start_date->format($time_format),
-    );
+    ];
 
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     $this->displayOptions = [
       'type' => 'daterange_default',
@@ -403,7 +403,7 @@ public function testDatetimeRangeField() {
       ->save();
     $expected = $start_date->format(DATETIME_DATETIME_STORAGE_FORMAT);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));
     $this->assertNoText(' THESEPARATOR ', 'Separator not found on page');
 
     $this->displayOptions['type'] = 'daterange_custom';
@@ -413,7 +413,7 @@ public function testDatetimeRangeField() {
       ->save();
     $expected = $start_date->format($this->displayOptions['settings']['date_format']);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
     $this->assertNoText(' THESEPARATOR ', 'Separator not found on page');
   }
 
@@ -448,14 +448,14 @@ public function testAlldayRangeField() {
     $date_format = DateFormat::load('html_date')->getPattern();
     $time_format = DateFormat::load('html_time')->getPattern();
 
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $start_date->format($date_format),
       "{$field_name}[0][end_value][date]" => $end_date->format($date_format),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
     $this->assertRaw($start_date->format($date_format));
     $this->assertNoRaw($start_date->format($time_format));
     $this->assertRaw($end_date->format($date_format));
@@ -492,17 +492,17 @@ public function testAlldayRangeField() {
       ->save();
     $expected = $start_date->format(DATETIME_DATETIME_STORAGE_FORMAT) . ' - ' . $end_date->format(DATETIME_DATETIME_STORAGE_FORMAT);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));
 
     // Verify that the custom formatter works.
     $this->displayOptions['type'] = 'daterange_custom';
-    $this->displayOptions['settings'] = array('date_format' => 'm/d/Y') + $this->defaultSettings;
+    $this->displayOptions['settings'] = ['date_format' => 'm/d/Y'] + $this->defaultSettings;
     entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
       ->setComponent($field_name, $this->displayOptions)
       ->save();
     $expected = $start_date->format($this->displayOptions['settings']['date_format']) . ' - ' . $end_date->format($this->displayOptions['settings']['date_format']);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
 
     // Verify that the 'timezone_override' setting works.
     $this->displayOptions['type'] = 'daterange_custom';
@@ -513,7 +513,7 @@ public function testAlldayRangeField() {
     $expected = $start_date->format($this->displayOptions['settings']['date_format'], ['timezone' => 'America/New_York']);
     $expected .= ' - ' . $end_date->format($this->displayOptions['settings']['date_format'], ['timezone' => 'America/New_York']);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
 
     // Test formatters when start date and end date are the same
     $this->drupalGet('entity_test/add');
@@ -526,14 +526,14 @@ public function testAlldayRangeField() {
     $date_format = DateFormat::load('html_date')->getPattern();
     $time_format = DateFormat::load('html_time')->getPattern();
 
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value][date]" => $start_date->format($date_format),
       "{$field_name}[0][end_value][date]" => $start_date->format($date_format),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     $this->displayOptions = [
       'type' => 'daterange_default',
@@ -568,7 +568,7 @@ public function testAlldayRangeField() {
       ->save();
     $expected = $start_date->format(DATETIME_DATETIME_STORAGE_FORMAT) . ' THESEPARATOR ' . $end_date->format(DATETIME_DATETIME_STORAGE_FORMAT);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));
     $this->assertText(' THESEPARATOR ', 'Found proper separator');
 
     $this->displayOptions['type'] = 'daterange_custom';
@@ -578,7 +578,7 @@ public function testAlldayRangeField() {
       ->save();
     $expected = $start_date->format($this->displayOptions['settings']['date_format']) . ' THESEPARATOR ' . $end_date->format($this->displayOptions['settings']['date_format']);
     $this->renderTestEntity($id);
-    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', array('%expected' => $expected)));
+    $this->assertText($expected, new FormattableMarkup('Formatted date field using daterange_custom format displayed as %expected.', ['%expected' => $expected]));
     $this->assertText(' THESEPARATOR ', 'Found proper separator');
 
   }
diff --git a/core/modules/dblog/dblog.admin.inc b/core/modules/dblog/dblog.admin.inc
index 2b08878c5cebe127ac26ee9f3b83b11ed604f08e..1af89a63ae30e272cc3230ae0349cc6839f57211 100644
--- a/core/modules/dblog/dblog.admin.inc
+++ b/core/modules/dblog/dblog.admin.inc
@@ -19,25 +19,25 @@
  *   - options: Array of options for the select list for the filter.
  */
 function dblog_filters() {
-  $filters = array();
+  $filters = [];
 
   foreach (_dblog_get_message_types() as $type) {
     $types[$type] = t($type);
   }
 
   if (!empty($types)) {
-    $filters['type'] = array(
+    $filters['type'] = [
       'title' => t('Type'),
       'where' => "w.type = ?",
       'options' => $types,
-    );
+    ];
   }
 
-  $filters['severity'] = array(
+  $filters['severity'] = [
     'title' => t('Severity'),
     'where' => 'w.severity = ?',
     'options' => RfcLogLevel::getLevels(),
-  );
+  ];
 
   return $filters;
 }
diff --git a/core/modules/dblog/dblog.install b/core/modules/dblog/dblog.install
index 08270d2b4d0686854323bd9ab2836a5088ce1cfc..f226ed04d9c9f310745e85e4604306cc958889d2 100644
--- a/core/modules/dblog/dblog.install
+++ b/core/modules/dblog/dblog.install
@@ -9,84 +9,84 @@
  * Implements hook_schema().
  */
 function dblog_schema() {
-  $schema['watchdog'] = array(
+  $schema['watchdog'] = [
     'description' => 'Table that contains logs of all system events.',
-    'fields' => array(
-      'wid' => array(
+    'fields' => [
+      'wid' => [
         'type' => 'serial',
         'not null' => TRUE,
         'description' => 'Primary Key: Unique watchdog event ID.',
-      ),
-      'uid' => array(
+      ],
+      'uid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The {users}.uid of the user who triggered the event.',
-      ),
-      'type' => array(
+      ],
+      'type' => [
         'type' => 'varchar_ascii',
         'length' => 64,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Type of log message, for example "user" or "page not found."',
-      ),
-      'message' => array(
+      ],
+      'message' => [
         'type' => 'text',
         'not null' => TRUE,
         'size' => 'big',
         'description' => 'Text of log message to be passed into the t() function.',
-      ),
-      'variables' => array(
+      ],
+      'variables' => [
         'type' => 'blob',
         'not null' => TRUE,
         'size' => 'big',
         'description' => 'Serialized array of variables that match the message string and that is passed into the t() function.',
-      ),
-      'severity' => array(
+      ],
+      'severity' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'size' => 'tiny',
         'description' => 'The severity level of the event; ranges from 0 (Emergency) to 7 (Debug)',
-      ),
-      'link' => array(
+      ],
+      'link' => [
         'type' => 'text',
         'not null' => FALSE,
         'description' => 'Link to view the result of the event.',
-      ),
-      'location'  => array(
+      ],
+      'location'  => [
         'type' => 'text',
         'not null' => TRUE,
         'description' => 'URL of the origin of the event.',
-      ),
-      'referer' => array(
+      ],
+      'referer' => [
         'type' => 'text',
         'not null' => FALSE,
         'description' => 'URL of referring page.',
-      ),
-      'hostname' => array(
+      ],
+      'hostname' => [
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Hostname of the user who triggered the event.',
-      ),
-      'timestamp' => array(
+      ],
+      'timestamp' => [
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'description' => 'Unix timestamp of when event occurred.',
-      ),
-    ),
-    'primary key' => array('wid'),
-    'indexes' => array(
-      'type' => array('type'),
-      'uid' => array('uid'),
-      'severity' => array('severity'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['wid'],
+    'indexes' => [
+      'type' => ['type'],
+      'uid' => ['uid'],
+      'severity' => ['severity'],
+    ],
+  ];
 
   return $schema;
 }
diff --git a/core/modules/dblog/dblog.module b/core/modules/dblog/dblog.module
index 06fef103fe5512ec1237562d8e42fcf964891bdb..ed92d6c8f2a9591a9a2be10c0ea8a4d13d0e37c0 100644
--- a/core/modules/dblog/dblog.module
+++ b/core/modules/dblog/dblog.module
@@ -21,13 +21,13 @@ function dblog_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.dblog':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Database Logging module logs system events in the Drupal database. For more information, see the <a href=":dblog">online documentation for the Database Logging module</a>.', array(':dblog' => 'https://www.drupal.org/documentation/modules/dblog')) . '</p>';
+      $output .= '<p>' . t('The Database Logging module logs system events in the Drupal database. For more information, see the <a href=":dblog">online documentation for the Database Logging module</a>.', [':dblog' => 'https://www.drupal.org/documentation/modules/dblog']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Monitoring your site') . '</dt>';
-      $output .= '<dd>' . t('The Database Logging module allows you to view an event log on the <a href=":dblog">Recent log messages</a> page. The log is a chronological list of recorded events containing usage data, performance data, errors, warnings and operational information. Administrators should check the log on a regular basis to ensure their site is working properly.', array(':dblog' => \Drupal::url('dblog.overview'))) . '</dd>';
+      $output .= '<dd>' . t('The Database Logging module allows you to view an event log on the <a href=":dblog">Recent log messages</a> page. The log is a chronological list of recorded events containing usage data, performance data, errors, warnings and operational information. Administrators should check the log on a regular basis to ensure their site is working properly.', [':dblog' => \Drupal::url('dblog.overview')]) . '</dd>';
       $output .= '<dt>' . t('Debugging site problems') . '</dt>';
-      $output .= '<dd>' . t('In case of errors or problems with the site, the <a href=":dblog">Recent log messages</a> page can be useful for debugging, since it shows the sequence of events. The log messages include usage information, warnings, and errors.', array(':dblog' => \Drupal::url('dblog.overview'))) . '</dd>';
+      $output .= '<dd>' . t('In case of errors or problems with the site, the <a href=":dblog">Recent log messages</a> page can be useful for debugging, since it shows the sequence of events. The log messages include usage information, warnings, and errors.', [':dblog' => \Drupal::url('dblog.overview')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -41,12 +41,12 @@ function dblog_help($route_name, RouteMatchInterface $route_match) {
  */
 function dblog_menu_links_discovered_alter(&$links) {
   if (\Drupal::moduleHandler()->moduleExists('search')) {
-    $links['dblog.search'] = array(
+    $links['dblog.search'] = [
       'title' => new TranslatableMarkup('Top search phrases'),
       'route_name' => 'dblog.search',
       'description' => new TranslatableMarkup('View most popular search phrases.'),
       'parent' => 'system.admin_reports',
-    );
+    ];
   }
 
   return $links;
@@ -66,7 +66,7 @@ function dblog_cron() {
   // e.g. auto_increment value > 1 or rows deleted directly from the table.
   if ($row_limit > 0) {
     $min_row = db_select('watchdog', 'w')
-      ->fields('w', array('wid'))
+      ->fields('w', ['wid'])
       ->orderBy('wid', 'DESC')
       ->range($row_limit - 1, 1)
       ->execute()->fetchField();
@@ -95,14 +95,14 @@ function _dblog_get_message_types() {
  * Implements hook_form_FORM_ID_alter() for system_logging_settings().
  */
 function dblog_form_system_logging_settings_alter(&$form, FormStateInterface $form_state) {
-  $row_limits = array(100, 1000, 10000, 100000, 1000000);
-  $form['dblog_row_limit'] = array(
+  $row_limits = [100, 1000, 10000, 100000, 1000000];
+  $form['dblog_row_limit'] = [
     '#type' => 'select',
     '#title' => t('Database log messages to keep'),
     '#default_value' => \Drupal::configFactory()->getEditable('dblog.settings')->get('row_limit'),
-    '#options' => array(0 => t('All')) + array_combine($row_limits, $row_limits),
-    '#description' => t('The maximum number of messages to keep in the database log. Requires a <a href=":cron">cron maintenance task</a>.', array(':cron' => \Drupal::url('system.status')))
-  );
+    '#options' => [0 => t('All')] + array_combine($row_limits, $row_limits),
+    '#description' => t('The maximum number of messages to keep in the database log. Requires a <a href=":cron">cron maintenance task</a>.', [':cron' => \Drupal::url('system.status')])
+  ];
 
   $form['#submit'][] = 'dblog_logging_settings_submit';
 }
diff --git a/core/modules/dblog/dblog.views.inc b/core/modules/dblog/dblog.views.inc
index dfc1fdec3f70ae5facdb3dc581d079550a285a4e..20ad9ceb290c301833aca567810a0f7934ecd24a 100644
--- a/core/modules/dblog/dblog.views.inc
+++ b/core/modules/dblog/dblog.views.inc
@@ -9,208 +9,208 @@
  * Implements hook_views_data().
  */
 function dblog_views_data() {
-  $data = array();
+  $data = [];
 
   $data['watchdog']['table']['group'] = t('Watchdog');
   $data['watchdog']['table']['wizard_id'] = 'watchdog';
 
-  $data['watchdog']['table']['base'] = array(
+  $data['watchdog']['table']['base'] = [
     'field' => 'wid',
     'title' => t('Log entries'),
     'help' => t('Contains a list of log entries.'),
-  );
+  ];
 
-  $data['watchdog']['wid'] = array(
+  $data['watchdog']['wid'] = [
     'title' => t('WID'),
     'help' => t('Unique watchdog event ID.'),
-    'field' => array(
+    'field' => [
       'id' => 'numeric',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'numeric',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'numeric',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['uid'] = array(
+  $data['watchdog']['uid'] = [
     'title' => t('UID'),
     'help' => t('The user ID of the user on which the log entry was written..'),
-    'field' => array(
+    'field' => [
       'id' => 'numeric',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'numeric',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'numeric',
-    ),
-    'relationship' => array(
+    ],
+    'relationship' => [
       'title' => t('User'),
       'help' => t('The user on which the log entry as written.'),
       'base' => 'users',
       'base field' => 'uid',
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['type'] = array(
+  $data['watchdog']['type'] = [
     'title' => t('Type'),
     'help' => t('The type of the log entry, for example "user" or "page not found".'),
-    'field' => array(
+    'field' => [
       'id' => 'standard',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'string',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'in_operator',
       'options callback' => '_dblog_get_message_types',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['message'] = array(
+  $data['watchdog']['message'] = [
     'title' => t('Message'),
     'help' => t('The actual message of the log entry.'),
-    'field' => array(
+    'field' => [
       'id' => 'dblog_message',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'string',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'string',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['variables'] = array(
+  $data['watchdog']['variables'] = [
     'title' => t('Variables'),
     'help' => t('The variables of the log entry in a serialized format.'),
-    'field' => array(
+    'field' => [
       'id' => 'serialized',
       'click sortable' => FALSE,
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'string',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'string',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['severity'] = array(
+  $data['watchdog']['severity'] = [
     'title' => t('Severity level'),
     'help' => t('The severity level of the event; ranges from 0 (Emergency) to 7 (Debug).'),
-    'field' => array(
+    'field' => [
       'id' => 'machine_name',
       'options callback' => 'Drupal\dblog\Controller\DbLogController::getLogLevelClassMap',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'in_operator',
       'options callback' => 'Drupal\dblog\Controller\DbLogController::getLogLevelClassMap',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['link'] = array(
+  $data['watchdog']['link'] = [
     'title' => t('Operations'),
     'help' => t('Operation links for the event.'),
-    'field' => array(
+    'field' => [
       'id' => 'dblog_operations',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'string',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'string',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['location'] = array(
+  $data['watchdog']['location'] = [
     'title' => t('Location'),
     'help' => t('URL of the origin of the event.'),
-    'field' => array(
+    'field' => [
       'id' => 'standard',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'string',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'string',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['referer'] = array(
+  $data['watchdog']['referer'] = [
     'title' => t('Referer'),
     'help' => t('URL of the previous page.'),
-    'field' => array(
+    'field' => [
       'id' => 'standard',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'string',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'string',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['hostname'] = array(
+  $data['watchdog']['hostname'] = [
     'title' => t('Hostname'),
     'help' => t('Hostname of the user who triggered the event.'),
-    'field' => array(
+    'field' => [
       'id' => 'standard',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'string',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'string',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['watchdog']['timestamp'] = array(
+  $data['watchdog']['timestamp'] = [
     'title' => t('Timestamp'),
     'help' => t('Date when the event occurred.'),
-    'field' => array(
+    'field' => [
       'id' => 'date',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'date',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'date',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'date',
-    ),
-  );
+    ],
+  ];
 
   return $data;
 }
diff --git a/core/modules/dblog/src/Controller/DbLogController.php b/core/modules/dblog/src/Controller/DbLogController.php
index 36ee20411e855615674c7e810878f8a28e8c9f49..946a73c9f2204cc64f8dbb84abc995ee11e91516 100644
--- a/core/modules/dblog/src/Controller/DbLogController.php
+++ b/core/modules/dblog/src/Controller/DbLogController.php
@@ -94,7 +94,7 @@ public function __construct(Connection $database, ModuleHandlerInterface $module
    *   An array of log level classes.
    */
   public static function getLogLevelClassMap() {
-    return array(
+    return [
       RfcLogLevel::DEBUG => 'dblog-debug',
       RfcLogLevel::INFO => 'dblog-info',
       RfcLogLevel::NOTICE => 'dblog-notice',
@@ -103,7 +103,7 @@ public static function getLogLevelClassMap() {
       RfcLogLevel::CRITICAL => 'dblog-critical',
       RfcLogLevel::ALERT => 'dblog-alert',
       RfcLogLevel::EMERGENCY => 'dblog-emergency',
-    );
+    ];
   }
 
   /**
@@ -121,7 +121,7 @@ public static function getLogLevelClassMap() {
   public function overview() {
 
     $filter = $this->buildFilterQuery();
-    $rows = array();
+    $rows = [];
 
     $classes = static::getLogLevelClassMap();
 
@@ -129,32 +129,32 @@ public function overview() {
 
     $build['dblog_filter_form'] = $this->formBuilder->getForm('Drupal\dblog\Form\DblogFilterForm');
 
-    $header = array(
+    $header = [
       // Icon column.
       '',
-      array(
+      [
         'data' => $this->t('Type'),
         'field' => 'w.type',
-        'class' => array(RESPONSIVE_PRIORITY_MEDIUM)),
-      array(
+        'class' => [RESPONSIVE_PRIORITY_MEDIUM]],
+      [
         'data' => $this->t('Date'),
         'field' => 'w.wid',
         'sort' => 'desc',
-        'class' => array(RESPONSIVE_PRIORITY_LOW)),
+        'class' => [RESPONSIVE_PRIORITY_LOW]],
       $this->t('Message'),
-      array(
+      [
         'data' => $this->t('User'),
         'field' => 'ufd.name',
-        'class' => array(RESPONSIVE_PRIORITY_MEDIUM)),
-      array(
+        'class' => [RESPONSIVE_PRIORITY_MEDIUM]],
+      [
         'data' => $this->t('Operations'),
-        'class' => array(RESPONSIVE_PRIORITY_LOW)),
-    );
+        'class' => [RESPONSIVE_PRIORITY_LOW]],
+    ];
 
     $query = $this->database->select('watchdog', 'w')
       ->extend('\Drupal\Core\Database\Query\PagerSelectExtender')
       ->extend('\Drupal\Core\Database\Query\TableSortExtender');
-    $query->fields('w', array(
+    $query->fields('w', [
       'wid',
       'uid',
       'severity',
@@ -163,7 +163,7 @@ public function overview() {
       'message',
       'variables',
       'link',
-    ));
+    ]);
     $query->leftJoin('users_field_data', 'ufd', 'w.uid = ufd.uid');
 
     if (!empty($filter['where'])) {
@@ -181,45 +181,45 @@ public function overview() {
         $log_text = Unicode::truncate($title, 56, TRUE, TRUE);
         // The link generator will escape any unsafe HTML entities in the final
         // text.
-        $message = $this->l($log_text, new Url('dblog.event', array('event_id' => $dblog->wid), array(
-          'attributes' => array(
+        $message = $this->l($log_text, new Url('dblog.event', ['event_id' => $dblog->wid], [
+          'attributes' => [
             // Provide a title for the link for useful hover hints. The
             // Attribute object will escape any unsafe HTML entities in the
             // final text.
             'title' => $title,
-          ),
-        )));
+          ],
+        ]));
       }
-      $username = array(
+      $username = [
         '#theme' => 'username',
         '#account' => $this->userStorage->load($dblog->uid),
-      );
-      $rows[] = array(
-        'data' => array(
+      ];
+      $rows[] = [
+        'data' => [
           // Cells.
-          array('class' => array('icon')),
+          ['class' => ['icon']],
           $this->t($dblog->type),
           $this->dateFormatter->format($dblog->timestamp, 'short'),
           $message,
-          array('data' => $username),
-          array('data' => array('#markup' => $dblog->link)),
-        ),
+          ['data' => $username],
+          ['data' => ['#markup' => $dblog->link]],
+        ],
         // Attributes for table row.
-        'class' => array(Html::getClass('dblog-' . $dblog->type), $classes[$dblog->severity]),
-      );
+        'class' => [Html::getClass('dblog-' . $dblog->type), $classes[$dblog->severity]],
+      ];
     }
 
-    $build['dblog_table'] = array(
+    $build['dblog_table'] = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
-      '#attributes' => array('id' => 'admin-dblog', 'class' => array('admin-dblog')),
+      '#attributes' => ['id' => 'admin-dblog', 'class' => ['admin-dblog']],
       '#empty' => $this->t('No log messages available.'),
-      '#attached' => array(
-        'library' => array('dblog/drupal.dblog'),
-      ),
-    );
-    $build['dblog_pager'] = array('#type' => 'pager');
+      '#attached' => [
+        'library' => ['dblog/drupal.dblog'],
+      ],
+    ];
+    $build['dblog_pager'] = ['#type' => 'pager'];
 
     return $build;
 
@@ -236,60 +236,60 @@ public function overview() {
    *   format expected by drupal_render();
    */
   public function eventDetails($event_id) {
-    $build = array();
-    if ($dblog = $this->database->query('SELECT w.*, u.uid FROM {watchdog} w LEFT JOIN {users} u ON u.uid = w.uid WHERE w.wid = :id', array(':id' => $event_id))->fetchObject()) {
+    $build = [];
+    if ($dblog = $this->database->query('SELECT w.*, u.uid FROM {watchdog} w LEFT JOIN {users} u ON u.uid = w.uid WHERE w.wid = :id', [':id' => $event_id])->fetchObject()) {
       $severity = RfcLogLevel::getLevels();
       $message = $this->formatMessage($dblog);
-      $username = array(
+      $username = [
         '#theme' => 'username',
         '#account' => $dblog->uid ? $this->userStorage->load($dblog->uid) : User::getAnonymousUser(),
-      );
-      $rows = array(
-        array(
-          array('data' => $this->t('Type'), 'header' => TRUE),
+      ];
+      $rows = [
+        [
+          ['data' => $this->t('Type'), 'header' => TRUE],
           $this->t($dblog->type),
-        ),
-        array(
-          array('data' => $this->t('Date'), 'header' => TRUE),
+        ],
+        [
+          ['data' => $this->t('Date'), 'header' => TRUE],
           $this->dateFormatter->format($dblog->timestamp, 'long'),
-        ),
-        array(
-          array('data' => $this->t('User'), 'header' => TRUE),
-          array('data' => $username),
-        ),
-        array(
-          array('data' => $this->t('Location'), 'header' => TRUE),
+        ],
+        [
+          ['data' => $this->t('User'), 'header' => TRUE],
+          ['data' => $username],
+        ],
+        [
+          ['data' => $this->t('Location'), 'header' => TRUE],
           $this->l($dblog->location, $dblog->location ? Url::fromUri($dblog->location) : Url::fromRoute('<none>')),
-        ),
-        array(
-          array('data' => $this->t('Referrer'), 'header' => TRUE),
+        ],
+        [
+          ['data' => $this->t('Referrer'), 'header' => TRUE],
           $this->l($dblog->referer, $dblog->referer ? Url::fromUri($dblog->referer) : Url::fromRoute('<none>')),
-        ),
-        array(
-          array('data' => $this->t('Message'), 'header' => TRUE),
+        ],
+        [
+          ['data' => $this->t('Message'), 'header' => TRUE],
           $message,
-        ),
-        array(
-          array('data' => $this->t('Severity'), 'header' => TRUE),
+        ],
+        [
+          ['data' => $this->t('Severity'), 'header' => TRUE],
           $severity[$dblog->severity],
-        ),
-        array(
-          array('data' => $this->t('Hostname'), 'header' => TRUE),
+        ],
+        [
+          ['data' => $this->t('Hostname'), 'header' => TRUE],
           $dblog->hostname,
-        ),
-        array(
-          array('data' => $this->t('Operations'), 'header' => TRUE),
-          array('data' => array('#markup' => $dblog->link)),
-        ),
-      );
-      $build['dblog_table'] = array(
+        ],
+        [
+          ['data' => $this->t('Operations'), 'header' => TRUE],
+          ['data' => ['#markup' => $dblog->link]],
+        ],
+      ];
+      $build['dblog_table'] = [
         '#type' => 'table',
         '#rows' => $rows,
-        '#attributes' => array('class' => array('dblog-event')),
-        '#attached' => array(
-          'library' => array('dblog/drupal.dblog'),
-        ),
-      );
+        '#attributes' => ['class' => ['dblog-event']],
+        '#attached' => [
+          'library' => ['dblog/drupal.dblog'],
+        ],
+      ];
     }
 
     return $build;
@@ -311,9 +311,9 @@ protected function buildFilterQuery() {
     $filters = dblog_filters();
 
     // Build query.
-    $where = $args = array();
+    $where = $args = [];
     foreach ($_SESSION['dblog_overview_filter'] as $key => $filter) {
-      $filter_where = array();
+      $filter_where = [];
       foreach ($filter as $value) {
         $filter_where[] = $filters[$key]['where'];
         $args[] = $value;
@@ -324,10 +324,10 @@ protected function buildFilterQuery() {
     }
     $where = !empty($where) ? implode(' AND ', $where) : '';
 
-    return array(
+    return [
       'where' => $where,
       'args' => $args,
-    );
+    ];
   }
 
   /**
@@ -378,10 +378,10 @@ public function formatMessage($row) {
    *   A build array in the format expected by drupal_render().
    */
   public function topLogMessages($type) {
-    $header = array(
-      array('data' => $this->t('Count'), 'field' => 'count', 'sort' => 'desc'),
-      array('data' => $this->t('Message'), 'field' => 'message'),
-    );
+    $header = [
+      ['data' => $this->t('Count'), 'field' => 'count', 'sort' => 'desc'],
+      ['data' => $this->t('Message'), 'field' => 'message'],
+    ];
 
     $count_query = $this->database->select('watchdog');
     $count_query->addExpression('COUNT(DISTINCT(message))');
@@ -392,7 +392,7 @@ public function topLogMessages($type) {
       ->extend('\Drupal\Core\Database\Query\TableSortExtender');
     $query->addExpression('COUNT(wid)', 'count');
     $query = $query
-      ->fields('w', array('message', 'variables'))
+      ->fields('w', ['message', 'variables'])
       ->condition('w.type', $type)
       ->groupBy('message')
       ->groupBy('variables')
@@ -401,23 +401,23 @@ public function topLogMessages($type) {
     $query->setCountQuery($count_query);
     $result = $query->execute();
 
-    $rows = array();
+    $rows = [];
     foreach ($result as $dblog) {
       if ($message = $this->formatMessage($dblog)) {
-        $rows[] = array($dblog->count, $message);
+        $rows[] = [$dblog->count, $message];
       }
     }
 
-    $build['dblog_top_table']  = array(
+    $build['dblog_top_table']  = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#empty' => $this->t('No log messages available.'),
-      '#attached' => array(
-        'library' => array('dblog/drupal.dblog'),
-      ),
-    );
-    $build['dblog_top_pager'] = array('#type' => 'pager');
+      '#attached' => [
+        'library' => ['dblog/drupal.dblog'],
+      ],
+    ];
+    $build['dblog_top_pager'] = ['#type' => 'pager'];
 
     return $build;
   }
diff --git a/core/modules/dblog/src/Form/DblogClearLogConfirmForm.php b/core/modules/dblog/src/Form/DblogClearLogConfirmForm.php
index b1710df298e8f75e1dce18a7407c59a69b3cfce8..0f420f05687a1505974c0dcdf238098166603fe7 100644
--- a/core/modules/dblog/src/Form/DblogClearLogConfirmForm.php
+++ b/core/modules/dblog/src/Form/DblogClearLogConfirmForm.php
@@ -64,7 +64,7 @@ public function getCancelUrl() {
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    $_SESSION['dblog_overview_filter'] = array();
+    $_SESSION['dblog_overview_filter'] = [];
     $this->connection->truncate('watchdog')->execute();
     drupal_set_message($this->t('Database log cleared.'));
     $form_state->setRedirectUrl($this->getCancelUrl());
diff --git a/core/modules/dblog/src/Form/DblogFilterForm.php b/core/modules/dblog/src/Form/DblogFilterForm.php
index 0434f121a0f95a4d5a532693a519f0c5db38affd..c8de0fc68bb884bc614f3145e8054e0eed11e11d 100644
--- a/core/modules/dblog/src/Form/DblogFilterForm.php
+++ b/core/modules/dblog/src/Form/DblogFilterForm.php
@@ -23,39 +23,39 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $filters = dblog_filters();
 
-    $form['filters'] = array(
+    $form['filters'] = [
       '#type' => 'details',
       '#title' => $this->t('Filter log messages'),
       '#open' => TRUE,
-    );
+    ];
     foreach ($filters as $key => $filter) {
-      $form['filters']['status'][$key] = array(
+      $form['filters']['status'][$key] = [
         '#title' => $filter['title'],
         '#type' => 'select',
         '#multiple' => TRUE,
         '#size' => 8,
         '#options' => $filter['options'],
-      );
+      ];
       if (!empty($_SESSION['dblog_overview_filter'][$key])) {
         $form['filters']['status'][$key]['#default_value'] = $_SESSION['dblog_overview_filter'][$key];
       }
     }
 
-    $form['filters']['actions'] = array(
+    $form['filters']['actions'] = [
       '#type' => 'actions',
-      '#attributes' => array('class' => array('container-inline')),
-    );
-    $form['filters']['actions']['submit'] = array(
+      '#attributes' => ['class' => ['container-inline']],
+    ];
+    $form['filters']['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Filter'),
-    );
+    ];
     if (!empty($_SESSION['dblog_overview_filter'])) {
-      $form['filters']['actions']['reset'] = array(
+      $form['filters']['actions']['reset'] = [
         '#type' => 'submit',
         '#value' => $this->t('Reset'),
-        '#limit_validation_errors' => array(),
-        '#submit' => array('::resetForm'),
-      );
+        '#limit_validation_errors' => [],
+        '#submit' => ['::resetForm'],
+      ];
     }
     return $form;
   }
@@ -90,7 +90,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
    *   The current state of the form.
    */
   public function resetForm(array &$form, FormStateInterface $form_state) {
-    $_SESSION['dblog_overview_filter'] = array();
+    $_SESSION['dblog_overview_filter'] = [];
   }
 
 }
diff --git a/core/modules/dblog/src/Logger/DbLog.php b/core/modules/dblog/src/Logger/DbLog.php
index af77be4d1c1128a42c5b45e0c52e0a4866d5855d..97b0b7b3059c92fa3b5278bb583130bf2872b9bb 100644
--- a/core/modules/dblog/src/Logger/DbLog.php
+++ b/core/modules/dblog/src/Logger/DbLog.php
@@ -53,7 +53,7 @@ public function __construct(Connection $connection, LogMessageParserInterface $p
   /**
    * {@inheritdoc}
    */
-  public function log($level, $message, array $context = array()) {
+  public function log($level, $message, array $context = []) {
     // Remove any backtraces since they may contain an unserializable variable.
     unset($context['backtrace']);
 
@@ -64,7 +64,7 @@ public function log($level, $message, array $context = array()) {
     try {
       $this->connection
         ->insert('watchdog')
-        ->fields(array(
+        ->fields([
           'uid' => $context['uid'],
           'type' => Unicode::substr($context['channel'], 0, 64),
           'message' => $message,
@@ -75,7 +75,7 @@ public function log($level, $message, array $context = array()) {
           'referer' => $context['referer'],
           'hostname' => Unicode::substr($context['ip'], 0, 128),
           'timestamp' => $context['timestamp'],
-        ))
+        ])
         ->execute();
     }
     catch (\Exception $e) {
diff --git a/core/modules/dblog/src/Plugin/rest/resource/DBLogResource.php b/core/modules/dblog/src/Plugin/rest/resource/DBLogResource.php
index 4ac76f046bd9360d997eb80d133d21f0cb646bfc..ed801fceccbbe236a1d1cfb8045176409fad6e87 100644
--- a/core/modules/dblog/src/Plugin/rest/resource/DBLogResource.php
+++ b/core/modules/dblog/src/Plugin/rest/resource/DBLogResource.php
@@ -38,13 +38,13 @@ class DBLogResource extends ResourceBase {
    */
   public function get($id = NULL) {
     if ($id) {
-      $record = db_query("SELECT * FROM {watchdog} WHERE wid = :wid", array(':wid' => $id))
+      $record = db_query("SELECT * FROM {watchdog} WHERE wid = :wid", [':wid' => $id])
         ->fetchAssoc();
       if (!empty($record)) {
         return new ResourceResponse($record);
       }
 
-      throw new NotFoundHttpException(t('Log entry with ID @id was not found', array('@id' => $id)));
+      throw new NotFoundHttpException(t('Log entry with ID @id was not found', ['@id' => $id]));
     }
 
     throw new BadRequestHttpException(t('No log entry ID was provided'));
diff --git a/core/modules/dblog/src/Plugin/views/field/DblogMessage.php b/core/modules/dblog/src/Plugin/views/field/DblogMessage.php
index e0558d897c34fc6b27ef83a6fc607d7495f96f3f..3c682428439bc957d3fa2beed796a2c9bee3badb 100644
--- a/core/modules/dblog/src/Plugin/views/field/DblogMessage.php
+++ b/core/modules/dblog/src/Plugin/views/field/DblogMessage.php
@@ -34,7 +34,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['replace_variables'] = array('default' => TRUE);
+    $options['replace_variables'] = ['default' => TRUE];
 
     return $options;
   }
@@ -45,11 +45,11 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['replace_variables'] = array(
+    $form['replace_variables'] = [
       '#title' => $this->t('Replace variables'),
       '#type' => 'checkbox',
       '#default_value' => $this->options['replace_variables'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/dblog/src/Tests/DbLogTest.php b/core/modules/dblog/src/Tests/DbLogTest.php
index daa9421b73172c896a18b78d16177f4511480089..878f632b00efda607cd8e980d10a6ac1e9244579 100644
--- a/core/modules/dblog/src/Tests/DbLogTest.php
+++ b/core/modules/dblog/src/Tests/DbLogTest.php
@@ -22,7 +22,7 @@ class DbLogTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('dblog', 'node', 'forum', 'help', 'block');
+  public static $modules = ['dblog', 'node', 'forum', 'help', 'block'];
 
   /**
    * A user with some relevant administrative permissions.
@@ -47,8 +47,8 @@ protected function setUp() {
     $this->drupalPlaceBlock('page_title_block');
 
     // Create users with specific permissions.
-    $this->adminUser = $this->drupalCreateUser(array('administer site configuration', 'access administration pages', 'access site reports', 'administer users'));
-    $this->webUser = $this->drupalCreateUser(array());
+    $this->adminUser = $this->drupalCreateUser(['administer site configuration', 'access administration pages', 'access site reports', 'administer users']);
+    $this->webUser = $this->drupalCreateUser([]);
   }
 
   /**
@@ -70,8 +70,8 @@ function testDbLog() {
     $this->verifyBreadcrumbs();
     $this->verifyLinkEscaping();
     // Verify the overview table sorting.
-    $orders = array('Date', 'Type', 'User');
-    $sorts = array('asc', 'desc');
+    $orders = ['Date', 'Type', 'User'];
+    $sorts = ['asc', 'desc'];
     foreach ($orders as $order) {
       foreach ($sorts as $sort) {
         $this->verifySort($sort, $order);
@@ -124,14 +124,14 @@ public function testLogEventPage() {
    */
   private function verifyRowLimit($row_limit) {
     // Change the database log row limit.
-    $edit = array();
+    $edit = [];
     $edit['dblog_row_limit'] = $row_limit;
     $this->drupalPostForm('admin/config/development/logging', $edit, t('Save configuration'));
     $this->assertResponse(200);
 
     // Check row limit variable.
     $current_limit = $this->config('dblog.settings')->get('row_limit');
-    $this->assertTrue($current_limit == $row_limit, format_string('[Cache] Row limit variable of @count equals row limit of @limit', array('@count' => $current_limit, '@limit' => $row_limit)));
+    $this->assertTrue($current_limit == $row_limit, format_string('[Cache] Row limit variable of @count equals row limit of @limit', ['@count' => $current_limit, '@limit' => $row_limit]));
   }
 
   /**
@@ -145,18 +145,18 @@ private function verifyCron($row_limit) {
     $this->generateLogEntries($row_limit + 10);
     // Verify that the database log row count exceeds the row limit.
     $count = db_query('SELECT COUNT(wid) FROM {watchdog}')->fetchField();
-    $this->assertTrue($count > $row_limit, format_string('Dblog row count of @count exceeds row limit of @limit', array('@count' => $count, '@limit' => $row_limit)));
+    $this->assertTrue($count > $row_limit, format_string('Dblog row count of @count exceeds row limit of @limit', ['@count' => $count, '@limit' => $row_limit]));
 
     // Get the number of enabled modules. Cron adds a log entry for each module.
     $list = \Drupal::moduleHandler()->getImplementations('cron');
     $module_count = count($list);
     $cron_detailed_count = $this->runCron();
-    $this->assertTrue($cron_detailed_count == $module_count + 2, format_string('Cron added @count of @expected new log entries', array('@count' => $cron_detailed_count, '@expected' => $module_count + 2)));
+    $this->assertTrue($cron_detailed_count == $module_count + 2, format_string('Cron added @count of @expected new log entries', ['@count' => $cron_detailed_count, '@expected' => $module_count + 2]));
 
     // Test disabling of detailed cron logging.
     $this->config('system.cron')->set('logging', 0)->save();
     $cron_count = $this->runCron();
-    $this->assertTrue($cron_count = 1, format_string('Cron added @count of @expected new log entries', array('@count' => $cron_count, '@expected' => 1)));
+    $this->assertTrue($cron_count = 1, format_string('Cron added @count of @expected new log entries', ['@count' => $cron_count, '@expected' => 1]));
   }
 
   /**
@@ -203,7 +203,7 @@ private function runCron() {
    *     entry.
    *   - 'timestamp': Int unix timestamp.
    */
-  private function generateLogEntries($count, $options = array()) {
+  private function generateLogEntries($count, $options = []) {
     global $base_root;
 
     // This long URL makes it just a little bit harder to pass the link part of
@@ -212,10 +212,10 @@ private function generateLogEntries($count, $options = array()) {
     $link = urldecode('/content/xo%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A%E9%85%B1%E5%87%89%E6%8B%8C%E7%B4%A0%E9%B8%A1%E7%85%A7%E7%83%A7%E9%B8%A1%E9%BB%84%E7%8E%AB%E7%91%B0-%E7%A7%91%E5%B7%9E%E7%9A%84%E5%B0%8F%E4%B9%9D%E5%AF%A8%E6%B2%9F%E7%BB%9D%E7%BE%8E%E9%AB%98%E5%B1%B1%E6%B9%96%E6%B3%8A-lake-isabelle');
 
     // Prepare the fields to be logged
-    $log = $options + array(
+    $log = $options + [
       'channel'     => 'custom',
       'message'     => 'Dblog test log message',
-      'variables'   => array(),
+      'variables'   => [],
       'severity'    => RfcLogLevel::NOTICE,
       'link'        => $link,
       'user'        => $this->adminUser,
@@ -224,7 +224,7 @@ private function generateLogEntries($count, $options = array()) {
       'referer'     => \Drupal::request()->server->get('HTTP_REFERER'),
       'ip'          => '127.0.0.1',
       'timestamp'   => REQUEST_TIME,
-    );
+    ];
 
     $logger = $this->container->get('logger.dblog');
     $message = $log['message'] . ' Entry #';
@@ -250,7 +250,7 @@ protected function clearLogsEntries() {
    *   (optional) The log entry severity.
   */
   protected function filterLogsEntries($type = NULL, $severity = NULL) {
-    $edit = array();
+    $edit = [];
     if (!is_null($type)) {
       $edit['type[]'] = $type;
     }
@@ -321,8 +321,8 @@ private function verifyBreadcrumbs() {
   private function verifyEvents() {
     // Invoke events.
     $this->doUser();
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => t('Article')));
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => t('Basic page')));
+    $this->drupalCreateContentType(['type' => 'article', 'name' => t('Article')]);
+    $this->drupalCreateContentType(['type' => 'page', 'name' => t('Basic page')]);
     $this->doNode('article');
     $this->doNode('page');
     $this->doNode('forum');
@@ -341,7 +341,7 @@ private function verifyEvents() {
    *   The order by which the table should be sorted.
    */
   public function verifySort($sort = 'asc', $order = 'Date') {
-    $this->drupalGet('admin/reports/dblog', array('query' => array('sort' => $sort, 'order' => $order)));
+    $this->drupalGet('admin/reports/dblog', ['query' => ['sort' => $sort, 'order' => $order]]);
     $this->assertResponse(200);
     $this->assertText(t('Recent log messages'), 'DBLog report was displayed correctly and sorting went fine.');
   }
@@ -351,12 +351,12 @@ public function verifySort($sort = 'asc', $order = 'Date') {
    * page.
    */
   private function verifyLinkEscaping() {
-    $link = \Drupal::l('View', Url::fromRoute('entity.node.canonical', array('node' => 1)));
+    $link = \Drupal::l('View', Url::fromRoute('entity.node.canonical', ['node' => 1]));
     $message = 'Log entry added to do the verifyLinkEscaping test.';
-    $this->generateLogEntries(1, array(
+    $this->generateLogEntries(1, [
       'message' => $message,
       'link' => $link,
-    ));
+    ]);
 
     $result = db_query_range('SELECT wid FROM {watchdog} ORDER BY wid DESC', 0, 1);
     $this->drupalGet('admin/reports/dblog/event/' . $result->fetchField());
@@ -374,7 +374,7 @@ private function doUser() {
     $pass = user_password();
     // Add a user using the form to generate an add user event (which is not
     // triggered by drupalCreateUser).
-    $edit = array();
+    $edit = [];
     $edit['name'] = $name;
     $edit['mail'] = $name . '@example.com';
     $edit['pass[pass1]'] = $pass;
@@ -384,7 +384,7 @@ private function doUser() {
     $this->assertResponse(200);
     // Retrieve the user object.
     $user = user_load_by_name($name);
-    $this->assertTrue($user != NULL, format_string('User @name was loaded', array('@name' => $name)));
+    $this->assertTrue($user != NULL, format_string('User @name was loaded', ['@name' => $name]));
     // pass_raw property is needed by drupalLogin.
     $user->pass_raw = $pass;
     // Log in user.
@@ -392,18 +392,18 @@ private function doUser() {
     // Log out user.
     $this->drupalLogout();
     // Fetch the row IDs in watchdog that relate to the user.
-    $result = db_query('SELECT wid FROM {watchdog} WHERE uid = :uid', array(':uid' => $user->id()));
+    $result = db_query('SELECT wid FROM {watchdog} WHERE uid = :uid', [':uid' => $user->id()]);
     foreach ($result as $row) {
       $ids[] = $row->wid;
     }
     $count_before = (isset($ids)) ? count($ids) : 0;
-    $this->assertTrue($count_before > 0, format_string('DBLog contains @count records for @name', array('@count' => $count_before, '@name' => $user->getUsername())));
+    $this->assertTrue($count_before > 0, format_string('DBLog contains @count records for @name', ['@count' => $count_before, '@name' => $user->getUsername()]));
 
     // Log in the admin user.
     $this->drupalLogin($this->adminUser);
     // Delete the user created at the start of this test.
     // We need to POST here to invoke batch_process() in the internal browser.
-    $this->drupalPostForm('user/' . $user->id() . '/cancel', array('user_cancel_method' => 'user_cancel_reassign'), t('Cancel account'));
+    $this->drupalPostForm('user/' . $user->id() . '/cancel', ['user_cancel_method' => 'user_cancel_reassign'], t('Cancel account'));
 
     // View the database log report.
     $this->drupalGet('admin/reports/dblog');
@@ -413,13 +413,13 @@ private function doUser() {
     // Add user.
     // Default display includes name and email address; if too long, the email
     // address is replaced by three periods.
-    $this->assertLogMessage(t('New user: %name %email.', array('%name' => $name, '%email' => '<' . $user->getEmail() . '>')), 'DBLog event was recorded: [add user]');
+    $this->assertLogMessage(t('New user: %name %email.', ['%name' => $name, '%email' => '<' . $user->getEmail() . '>']), 'DBLog event was recorded: [add user]');
     // Log in user.
-    $this->assertLogMessage(t('Session opened for %name.', array('%name' => $name)), 'DBLog event was recorded: [login user]');
+    $this->assertLogMessage(t('Session opened for %name.', ['%name' => $name]), 'DBLog event was recorded: [login user]');
     // Log out user.
-    $this->assertLogMessage(t('Session closed for %name.', array('%name' => $name)), 'DBLog event was recorded: [logout user]');
+    $this->assertLogMessage(t('Session closed for %name.', ['%name' => $name]), 'DBLog event was recorded: [logout user]');
     // Delete user.
-    $message = t('Deleted user: %name %email.', array('%name' => $name, '%email' => '<' . $user->getEmail() . '>'));
+    $message = t('Deleted user: %name %email.', ['%name' => $name, '%email' => '<' . $user->getEmail() . '>']);
     $message_text = Unicode::truncate(Html::decodeEntities(strip_tags($message)), 56, TRUE, TRUE);
     // Verify that the full message displays on the details page.
     $link = FALSE;
@@ -457,7 +457,7 @@ private function doUser() {
    */
   private function doNode($type) {
     // Create user.
-    $perm = array('create ' . $type . ' content', 'edit own ' . $type . ' content', 'delete own ' . $type . ' content');
+    $perm = ['create ' . $type . ' content', 'edit own ' . $type . ' content', 'delete own ' . $type . ' content'];
     $user = $this->drupalCreateUser($perm);
     // Log in user.
     $this->drupalLogin($user);
@@ -470,13 +470,13 @@ private function doNode($type) {
     $this->assertResponse(200);
     // Retrieve the node object.
     $node = $this->drupalGetNodeByTitle($title);
-    $this->assertTrue($node != NULL, format_string('Node @title was loaded', array('@title' => $title)));
+    $this->assertTrue($node != NULL, format_string('Node @title was loaded', ['@title' => $title]));
     // Edit the node.
     $edit = $this->getContentUpdate($type);
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
     $this->assertResponse(200);
     // Delete the node.
-    $this->drupalPostForm('node/' . $node->id() . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('node/' . $node->id() . '/delete', [], t('Delete'));
     $this->assertResponse(200);
     // View the node (to generate page not found event).
     $this->drupalGet('node/' . $node->id());
@@ -493,11 +493,11 @@ private function doNode($type) {
 
     // Verify that node events were recorded.
     // Was node content added?
-    $this->assertLogMessage(t('@type: added %title.', array('@type' => $type, '%title' => $title)), 'DBLog event was recorded: [content added]');
+    $this->assertLogMessage(t('@type: added %title.', ['@type' => $type, '%title' => $title]), 'DBLog event was recorded: [content added]');
     // Was node content updated?
-    $this->assertLogMessage(t('@type: updated %title.', array('@type' => $type, '%title' => $title)), 'DBLog event was recorded: [content updated]');
+    $this->assertLogMessage(t('@type: updated %title.', ['@type' => $type, '%title' => $title]), 'DBLog event was recorded: [content updated]');
     // Was node content deleted?
-    $this->assertLogMessage(t('@type: deleted %title.', array('@type' => $type, '%title' => $title)), 'DBLog event was recorded: [content deleted]');
+    $this->assertLogMessage(t('@type: deleted %title.', ['@type' => $type, '%title' => $title]), 'DBLog event was recorded: [content deleted]');
 
     // View the database log access-denied report page.
     $this->drupalGet('admin/reports/access-denied');
@@ -524,18 +524,18 @@ private function doNode($type) {
   private function getContent($type) {
     switch ($type) {
       case 'forum':
-        $content = array(
+        $content = [
           'title[0][value]' => $this->randomMachineName(8),
-          'taxonomy_forums' => array(1),
+          'taxonomy_forums' => [1],
           'body[0][value]' => $this->randomMachineName(32),
-        );
+        ];
         break;
 
       default:
-        $content = array(
+        $content = [
           'title[0][value]' => $this->randomMachineName(8),
           'body[0][value]' => $this->randomMachineName(32),
-        );
+        ];
         break;
     }
     return $content;
@@ -551,9 +551,9 @@ private function getContent($type) {
    *   Random content needed by various node types.
    */
   private function getContentUpdate($type) {
-    $content = array(
+    $content = [
       'body[0][value]' => $this->randomMachineName(32),
-    );
+    ];
     return $content;
   }
 
@@ -567,10 +567,10 @@ public function testDBLogAddAndClear() {
     global $base_root;
     // Get a count of how many watchdog entries already exist.
     $count = db_query('SELECT COUNT(*) FROM {watchdog}')->fetchField();
-    $log = array(
+    $log = [
       'channel'     => 'system',
       'message'     => 'Log entry added to test the doClearTest clear down.',
-      'variables'   => array(),
+      'variables'   => [],
       'severity'    => RfcLogLevel::NOTICE,
       'link'        => NULL,
       'user'        => $this->adminUser,
@@ -579,20 +579,20 @@ public function testDBLogAddAndClear() {
       'referer'     => \Drupal::request()->server->get('HTTP_REFERER'),
       'ip'          => '127.0.0.1',
       'timestamp'   => REQUEST_TIME,
-    );
+    ];
     // Add a watchdog entry.
     $this->container->get('logger.dblog')->log($log['severity'], $log['message'], $log);
     // Make sure the table count has actually been incremented.
-    $this->assertEqual($count + 1, db_query('SELECT COUNT(*) FROM {watchdog}')->fetchField(), format_string('\Drupal\dblog\Logger\DbLog->log() added an entry to the dblog :count', array(':count' => $count)));
+    $this->assertEqual($count + 1, db_query('SELECT COUNT(*) FROM {watchdog}')->fetchField(), format_string('\Drupal\dblog\Logger\DbLog->log() added an entry to the dblog :count', [':count' => $count]));
     // Log in the admin user.
     $this->drupalLogin($this->adminUser);
     // Post in order to clear the database table.
     $this->clearLogsEntries();
     // Confirm that the logs should be cleared.
-    $this->drupalPostForm(NULL, array(), 'Confirm');
+    $this->drupalPostForm(NULL, [], 'Confirm');
     // Count the rows in watchdog that previously related to the deleted user.
     $count = db_query('SELECT COUNT(*) FROM {watchdog}')->fetchField();
-    $this->assertEqual($count, 0, format_string('DBLog contains :count records after a clear.', array(':count' => $count)));
+    $this->assertEqual($count, 0, format_string('DBLog contains :count records after a clear.', [':count' => $count]));
   }
 
   /**
@@ -605,21 +605,21 @@ public function testFilter() {
     db_delete('watchdog')->execute();
 
     // Generate 9 random watchdog entries.
-    $type_names = array();
-    $types = array();
+    $type_names = [];
+    $types = [];
     for ($i = 0; $i < 3; $i++) {
       $type_names[] = $type_name = $this->randomMachineName();
       $severity = RfcLogLevel::EMERGENCY;
       for ($j = 0; $j < 3; $j++) {
-        $types[] = $type = array(
+        $types[] = $type = [
           'count' => $j + 1,
           'type' => $type_name,
           'severity' => $severity++,
-        );
-        $this->generateLogEntries($type['count'], array(
+        ];
+        $this->generateLogEntries($type['count'], [
           'channel' => $type['type'],
           'severity' => $type['severity'],
-        ));
+        ]);
       }
     }
 
@@ -658,14 +658,14 @@ public function testFilter() {
       $this->assertEqual(array_sum($count), $type['count'], 'Count matched');
     }
 
-    $this->drupalGet('admin/reports/dblog', array('query' => array('order' => 'Type')));
+    $this->drupalGet('admin/reports/dblog', ['query' => ['order' => 'Type']]);
     $this->assertResponse(200);
     $this->assertText(t('Operations'), 'Operations text found');
 
     // Clear all logs and make sure the confirmation message is found.
     $this->clearLogsEntries();
     // Confirm that the logs should be cleared.
-    $this->drupalPostForm(NULL, array(), 'Confirm');
+    $this->drupalPostForm(NULL, [], 'Confirm');
     $this->assertText(t('Database log cleared.'), 'Confirmation message found');
   }
 
@@ -680,16 +680,16 @@ public function testFilter() {
    *   - user: (string) The user associated with this database log event.
    */
   protected function getLogEntries() {
-    $entries = array();
+    $entries = [];
     if ($table = $this->getLogsEntriesTable()) {
       $table = array_shift($table);
       foreach ($table->tbody->tr as $row) {
-        $entries[] = array(
+        $entries[] = [
           'severity' => $this->getSeverityConstant($row['class']),
           'type' => $this->asText($row->td[1]),
           'message' => $this->asText($row->td[3]),
           'user' => $this->asText($row->td[4]),
-        );
+        ];
       }
     }
     return $entries;
@@ -795,7 +795,7 @@ public function testTemporaryUser() {
     $this->drupalLogin($this->adminUser);
 
     // Generate a single watchdog entry.
-    $this->generateLogEntries(1, array('user' => $tempuser, 'uid' => $tempuser_uid));
+    $this->generateLogEntries(1, ['user' => $tempuser, 'uid' => $tempuser_uid]);
     $wid = db_query('SELECT MAX(wid) FROM {watchdog}')->fetchField();
 
     // Check if the full message displays on the details page.
diff --git a/core/modules/dblog/src/Tests/Rest/DbLogResourceTest.php b/core/modules/dblog/src/Tests/Rest/DbLogResourceTest.php
index 279d202a14564f92afbb0b44107ec5a071c3ba2a..44dbe99dd1eab7789ac5a39228f43e4e0a217775 100644
--- a/core/modules/dblog/src/Tests/Rest/DbLogResourceTest.php
+++ b/core/modules/dblog/src/Tests/Rest/DbLogResourceTest.php
@@ -18,7 +18,7 @@ class DbLogResourceTest extends RESTTestBase {
    *
    * @var array
    */
-  public static $modules = array('hal', 'dblog');
+  public static $modules = ['hal', 'dblog'];
 
   protected function setUp() {
     parent::setUp();
@@ -33,12 +33,12 @@ public function testWatchdog() {
     // Write a log message to the DB.
     $this->container->get('logger.channel.rest')->notice('Test message');
     // Get the ID of the written message.
-    $id = db_query_range("SELECT wid FROM {watchdog} WHERE type = :type ORDER BY wid DESC", 0, 1, array(':type' => 'rest'))
+    $id = db_query_range("SELECT wid FROM {watchdog} WHERE type = :type ORDER BY wid DESC", 0, 1, [':type' => 'rest'])
       ->fetchField();
 
     // Create a user account that has the required permissions to read
     // the watchdog resource via the REST API.
-    $account = $this->drupalCreateUser(array('restful get dblog'));
+    $account = $this->drupalCreateUser(['restful get dblog']);
     $this->drupalLogin($account);
 
     $response = $this->httpRequest(Url::fromRoute('rest.dblog.GET.' . $this->defaultFormat, ['id' => $id, '_format' => $this->defaultFormat]), 'GET');
diff --git a/core/modules/dblog/tests/src/Functional/ConnectionFailureTest.php b/core/modules/dblog/tests/src/Functional/ConnectionFailureTest.php
index df088a3d256c53d64b933177d449df20b71b12c3..44b045782dafbf5164bddb05091348f67d689884 100644
--- a/core/modules/dblog/tests/src/Functional/ConnectionFailureTest.php
+++ b/core/modules/dblog/tests/src/Functional/ConnectionFailureTest.php
@@ -12,7 +12,7 @@
  */
 class ConnectionFailureTest extends BrowserTestBase {
 
-  public static $modules = array('dblog');
+  public static $modules = ['dblog'];
 
   /**
    * Tests logging of connection failures.
diff --git a/core/modules/dblog/tests/src/Kernel/DbLogFormInjectionTest.php b/core/modules/dblog/tests/src/Kernel/DbLogFormInjectionTest.php
index 569cdbf7d64524ce632aa0f8221661cd31a2a66e..c0d97bee35bfd146cdbdd6f78b5fe6c89170a122 100644
--- a/core/modules/dblog/tests/src/Kernel/DbLogFormInjectionTest.php
+++ b/core/modules/dblog/tests/src/Kernel/DbLogFormInjectionTest.php
@@ -31,7 +31,7 @@ class DbLogFormInjectionTest extends KernelTestBase implements FormInterface {
    *
    * @var array
    */
-  public static $modules = array('system', 'dblog', 'user');
+  public static $modules = ['system', 'dblog', 'user'];
 
   /**
    * {@inheritdoc}
@@ -82,10 +82,10 @@ protected function setUp() {
     $this->installSchema('system', ['key_value_expire', 'sequences']);
     $this->installEntitySchema('user');
     $this->logger = \Drupal::logger('test_logger');
-    $test_user = User::create(array(
+    $test_user = User::create([
       'name' => 'foobar',
       'mail' => 'foobar@example.com',
-    ));
+    ]);
     $test_user->save();
     \Drupal::service('current_user')->setAccount($test_user);
   }
diff --git a/core/modules/dblog/tests/src/Kernel/Views/ViewsIntegrationTest.php b/core/modules/dblog/tests/src/Kernel/Views/ViewsIntegrationTest.php
index 1968a12e964a9cb18a5b955635fcf0c735e22cd7..7b63394d52b8ca0c0b003330f6a4528fc8b592d1 100644
--- a/core/modules/dblog/tests/src/Kernel/Views/ViewsIntegrationTest.php
+++ b/core/modules/dblog/tests/src/Kernel/Views/ViewsIntegrationTest.php
@@ -22,14 +22,14 @@ class ViewsIntegrationTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_dblog');
+  public static $testViews = ['test_dblog'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('dblog', 'dblog_test_views', 'user');
+  public static $modules = ['dblog', 'dblog_test_views', 'user'];
 
   /**
    * {@inheritdoc}
@@ -40,9 +40,9 @@ protected function setUp($import_test_views = TRUE) {
     // Rebuild the router, otherwise we can't generate links.
     $this->container->get('router.builder')->rebuild();
 
-    $this->installSchema('dblog', array('watchdog'));
+    $this->installSchema('dblog', ['watchdog']);
 
-    ViewTestData::createTestViews(get_class($this), array('dblog_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['dblog_test_views']);
   }
 
   /**
@@ -53,35 +53,35 @@ public function testIntegration() {
     // Remove the watchdog entries added by the potential batch process.
     $this->container->get('database')->truncate('watchdog')->execute();
 
-    $entries = array();
+    $entries = [];
     // Setup a watchdog entry without tokens.
-    $entries[] = array(
+    $entries[] = [
       'message' => $this->randomMachineName(),
-      'variables' => array('link' => \Drupal::l('Link', new Url('<front>'))),
-    );
+      'variables' => ['link' => \Drupal::l('Link', new Url('<front>'))],
+    ];
     // Setup a watchdog entry with one token.
-    $entries[] = array(
+    $entries[] = [
       'message' => '@token1',
-      'variables' => array('@token1' => $this->randomMachineName(), 'link' => \Drupal::l('Link', new Url('<front>'))),
-    );
+      'variables' => ['@token1' => $this->randomMachineName(), 'link' => \Drupal::l('Link', new Url('<front>'))],
+    ];
     // Setup a watchdog entry with two tokens.
-    $entries[] = array(
+    $entries[] = [
       'message' => '@token1 @token2',
       // Setup a link with a tag which is filtered by
       // \Drupal\Component\Utility\Xss::filterAdmin() in order to make sure
       // that strings which are not marked as safe get filtered.
-      'variables' => array(
+      'variables' => [
         '@token1' => $this->randomMachineName(),
         '@token2' => $this->randomMachineName(),
         'link' => '<a href="' . \Drupal::url('<front>') . '"><object>Link</object></a>',
-      ),
-    );
+      ],
+    ];
     $logger_factory = $this->container->get('logger.factory');
     foreach ($entries as $entry) {
-      $entry += array(
+      $entry += [
         'type' => 'test-views',
         'severity' => RfcLogLevel::NOTICE,
-      );
+      ];
       $logger_factory->get($entry['type'])->log($entry['severity'], $entry['message'], $entry['variables']);
     }
 
diff --git a/core/modules/dynamic_page_cache/tests/src/Functional/DynamicPageCacheIntegrationTest.php b/core/modules/dynamic_page_cache/tests/src/Functional/DynamicPageCacheIntegrationTest.php
index 5b8e5d7332990a007e0610d8876ea5af7ba6e354..ffa8f4375f64f53a5937f740e9761ef784d3595b 100644
--- a/core/modules/dynamic_page_cache/tests/src/Functional/DynamicPageCacheIntegrationTest.php
+++ b/core/modules/dynamic_page_cache/tests/src/Functional/DynamicPageCacheIntegrationTest.php
@@ -94,11 +94,11 @@ public function testDynamicPageCache() {
     // Controllers returning render arrays, rendered as anything except a HTML
     // response, are ignored by Dynamic Page Cache (but only because those
     // wrapper formats' responses do not implement CacheableResponseInterface).
-    $this->drupalGet('dynamic-page-cache-test/html', array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax')));
+    $this->drupalGet('dynamic-page-cache-test/html', ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $this->assertFalse($this->drupalGetHeader(DynamicPageCacheSubscriber::HEADER), 'Render array returned, rendered as AJAX response: Dynamic Page Cache is ignoring.');
-    $this->drupalGet('dynamic-page-cache-test/html', array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_dialog')));
+    $this->drupalGet('dynamic-page-cache-test/html', ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_dialog']]);
     $this->assertFalse($this->drupalGetHeader(DynamicPageCacheSubscriber::HEADER), 'Render array returned, rendered as dialog response: Dynamic Page Cache is ignoring.');
-    $this->drupalGet('dynamic-page-cache-test/html', array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_modal')));
+    $this->drupalGet('dynamic-page-cache-test/html', ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_modal']]);
     $this->assertFalse($this->drupalGetHeader(DynamicPageCacheSubscriber::HEADER), 'Render array returned, rendered as modal response: Dynamic Page Cache is ignoring.');
 
     // Admin routes are ignored by Dynamic Page Cache.
diff --git a/core/modules/editor/editor.admin.inc b/core/modules/editor/editor.admin.inc
index 83bc2cf3785f798ce663cd414ebdd136a5820d03..f91db4b9619d4ff17528a829bf187bb5207e8eda 100644
--- a/core/modules/editor/editor.admin.inc
+++ b/core/modules/editor/editor.admin.inc
@@ -27,77 +27,77 @@
 function editor_image_upload_settings_form(Editor $editor) {
   // Defaults.
   $image_upload = $editor->getImageUploadSettings();
-  $image_upload += array(
+  $image_upload += [
     'status' => FALSE,
     'scheme' => file_default_scheme(),
     'directory' => 'inline-images',
     'max_size' => '',
-    'max_dimensions' => array('width' => '', 'height' => ''),
-  );
+    'max_dimensions' => ['width' => '', 'height' => ''],
+  ];
 
-  $form['status'] = array(
+  $form['status'] = [
     '#type' => 'checkbox',
     '#title' => t('Enable image uploads'),
     '#default_value' => $image_upload['status'],
-    '#attributes' => array(
+    '#attributes' => [
       'data-editor-image-upload' => 'status',
-    ),
-  );
-  $show_if_image_uploads_enabled = array(
-    'visible' => array(
-      ':input[data-editor-image-upload="status"]' => array('checked' => TRUE),
-    ),
-  );
+    ],
+  ];
+  $show_if_image_uploads_enabled = [
+    'visible' => [
+      ':input[data-editor-image-upload="status"]' => ['checked' => TRUE],
+    ],
+  ];
 
   // Any visible, writable wrapper can potentially be used for uploads,
   // including a remote file system that integrates with a CDN.
   $options = \Drupal::service('stream_wrapper_manager')->getDescriptions(StreamWrapperInterface::WRITE_VISIBLE);
   if (!empty($options)) {
-    $form['scheme'] = array(
+    $form['scheme'] = [
       '#type' => 'radios',
       '#title' => t('File storage'),
       '#default_value' => $image_upload['scheme'],
       '#options' => $options,
       '#states' => $show_if_image_uploads_enabled,
       '#access' => count($options) > 1,
-    );
+    ];
   }
   // Set data- attributes with human-readable names for all possible stream
   // wrappers, so that drupal.ckeditor.drupalimage.admin's summary rendering
   // can use that.
   foreach (\Drupal::service('stream_wrapper_manager')->getNames(StreamWrapperInterface::WRITE_VISIBLE) as $scheme => $name) {
-    $form['scheme'][$scheme]['#attributes']['data-label'] = t('Storage: @name', array('@name' => $name));
+    $form['scheme'][$scheme]['#attributes']['data-label'] = t('Storage: @name', ['@name' => $name]);
   }
 
-  $form['directory'] = array(
+  $form['directory'] = [
     '#type' => 'textfield',
     '#default_value' => $image_upload['directory'],
     '#title' => t('Upload directory'),
     '#description' => t("A directory relative to Drupal's files directory where uploaded images will be stored."),
     '#states' => $show_if_image_uploads_enabled,
-  );
+  ];
 
   $default_max_size = format_size(file_upload_max_size());
-  $form['max_size'] = array(
+  $form['max_size'] = [
     '#type' => 'textfield',
     '#default_value' => $image_upload['max_size'],
     '#title' => t('Maximum file size'),
-    '#description' => t('If this is left empty, then the file size will be limited by the PHP maximum upload size of @size.', array('@size' => $default_max_size)),
+    '#description' => t('If this is left empty, then the file size will be limited by the PHP maximum upload size of @size.', ['@size' => $default_max_size]),
     '#maxlength' => 20,
     '#size' => 10,
     '#placeholder' => $default_max_size,
     '#states' => $show_if_image_uploads_enabled,
-  );
+  ];
 
-  $form['max_dimensions'] = array(
+  $form['max_dimensions'] = [
     '#type' => 'item',
     '#title' => t('Maximum dimensions'),
     '#field_prefix' => '<div class="container-inline clearfix">',
     '#field_suffix' => '</div>',
     '#description' => t('Images larger than these dimensions will be scaled down.'),
     '#states' => $show_if_image_uploads_enabled,
-  );
-  $form['max_dimensions']['width'] = array(
+  ];
+  $form['max_dimensions']['width'] = [
     '#title' => t('Width'),
     '#title_display' => 'invisible',
     '#type' => 'number',
@@ -109,8 +109,8 @@ function editor_image_upload_settings_form(Editor $editor) {
     '#placeholder' => t('width'),
     '#field_suffix' => ' x ',
     '#states' => $show_if_image_uploads_enabled,
-  );
-  $form['max_dimensions']['height'] = array(
+  ];
+  $form['max_dimensions']['height'] = [
     '#title' => t('Height'),
     '#title_display' => 'invisible',
     '#type' => 'number',
@@ -122,7 +122,7 @@ function editor_image_upload_settings_form(Editor $editor) {
     '#placeholder' => t('height'),
     '#field_suffix' => t('pixels'),
     '#states' => $show_if_image_uploads_enabled,
-  );
+  ];
 
   return $form;
 }
diff --git a/core/modules/editor/editor.api.php b/core/modules/editor/editor.api.php
index 2fd9fa41b91f6a798974ec9f2d4d402db96b55e0..6485a1e5fc3303fda6182cb378982cc2156951dd 100644
--- a/core/modules/editor/editor.api.php
+++ b/core/modules/editor/editor.api.php
@@ -36,7 +36,7 @@ function hook_editor_info_alter(array &$editors) {
 function hook_editor_js_settings_alter(array &$settings) {
   if (isset($settings['editor']['formats']['basic_html'])) {
     $settings['editor']['formats']['basic_html']['editor'] = 'MyDifferentEditor';
-    $settings['editor']['formats']['basic_html']['editorSettings']['buttons'] = array('strong', 'italic', 'underline');
+    $settings['editor']['formats']['basic_html']['editorSettings']['buttons'] = ['strong', 'italic', 'underline'];
   }
 }
 
diff --git a/core/modules/editor/editor.module b/core/modules/editor/editor.module
index 8df1f0460a9d494b7da590eb4e6c6dd3c30bdff2..04e4cd5a3c13db7dfa121cd70498f54fbc938e34 100644
--- a/core/modules/editor/editor.module
+++ b/core/modules/editor/editor.module
@@ -25,13 +25,13 @@ function editor_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.editor':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Text Editor module provides a framework that other modules (such as <a href=":ckeditor">CKEditor module</a>) can use to provide toolbars and other functionality that allow users to format text more easily than typing HTML tags directly. For more information, see the <a href=":documentation">online documentation for the Text Editor module</a>.', array(':documentation' => 'https://www.drupal.org/documentation/modules/editor', ':ckeditor' => (\Drupal::moduleHandler()->moduleExists('ckeditor')) ? \Drupal::url('help.page', array('name' => 'ckeditor')) : '#')) . '</p>';
+      $output .= '<p>' . t('The Text Editor module provides a framework that other modules (such as <a href=":ckeditor">CKEditor module</a>) can use to provide toolbars and other functionality that allow users to format text more easily than typing HTML tags directly. For more information, see the <a href=":documentation">online documentation for the Text Editor module</a>.', [':documentation' => 'https://www.drupal.org/documentation/modules/editor', ':ckeditor' => (\Drupal::moduleHandler()->moduleExists('ckeditor')) ? \Drupal::url('help.page', ['name' => 'ckeditor']) : '#']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Installing text editors') . '</dt>';
-      $output .= '<dd>' . t('The Text Editor module provides a framework for managing editors. To use it, you also need to enable a text editor. This can either be the core <a href=":ckeditor">CKEditor module</a>, which can be enabled on the <a href=":extend">Extend page</a>, or a contributed module for any other text editor. When installing a contributed text editor module, be sure to check the installation instructions, because you will most likely need to download and install an external library as well as the Drupal module.', array(':ckeditor' => (\Drupal::moduleHandler()->moduleExists('ckeditor')) ? \Drupal::url('help.page', array('name' => 'ckeditor')) : '#', ':extend' => \Drupal::url('system.modules_list'))) . '</dd>';
+      $output .= '<dd>' . t('The Text Editor module provides a framework for managing editors. To use it, you also need to enable a text editor. This can either be the core <a href=":ckeditor">CKEditor module</a>, which can be enabled on the <a href=":extend">Extend page</a>, or a contributed module for any other text editor. When installing a contributed text editor module, be sure to check the installation instructions, because you will most likely need to download and install an external library as well as the Drupal module.', [':ckeditor' => (\Drupal::moduleHandler()->moduleExists('ckeditor')) ? \Drupal::url('help.page', ['name' => 'ckeditor']) : '#', ':extend' => \Drupal::url('system.modules_list')]) . '</dd>';
       $output .= '<dt>' . t('Enabling a text editor for a text format') . '</dt>';
-      $output .= '<dd>' . t('On the <a href=":formats">Text formats and editors page</a> you can see which text editor is associated with each text format. You can change this by clicking on the <em>Configure</em> link, and then choosing a text editor or <em>none</em> from the <em>Text editor</em> drop-down list. The text editor will then be displayed with any text field for which this text format is chosen.', array(':formats' => \Drupal::url('filter.admin_overview'))) . '</dd>';
+      $output .= '<dd>' . t('On the <a href=":formats">Text formats and editors page</a> you can see which text editor is associated with each text format. You can change this by clicking on the <em>Configure</em> link, and then choosing a text editor or <em>none</em> from the <em>Text editor</em> drop-down list. The text editor will then be displayed with any text field for which this text format is chosen.', [':formats' => \Drupal::url('filter.admin_overview')]) . '</dd>';
       $output .= '<dt>' . t('Configuring a text editor') . '</dt>';
       $output .= '<dd>' . t('Once a text editor is associated with a text format, you can configure it by clicking on the <em>Configure</em> link for this format. Depending on the specific text editor, you can configure it for example by adding buttons to its toolbar. Typically these buttons provide formatting or editing tools, and they often insert HTML tags into the field source. For details, see the help page of the specific text editor.') . '</dd>';
       $output .= '<dt>' . t('Using different text editors and formats') . '</dt>';
@@ -86,7 +86,7 @@ function editor_form_filter_admin_overview_alter(&$form, FormStateInterface $for
   // @todo Cleanup column injection: https://www.drupal.org/node/1876718.
   // Splice in the column for "Text editor" into the header.
   $position = array_search('name', $form['formats']['#header']) + 1;
-  $start = array_splice($form['formats']['#header'], 0, $position, array('editor' => t('Text editor')));
+  $start = array_splice($form['formats']['#header'], 0, $position, ['editor' => t('Text editor')]);
   $form['formats']['#header'] = array_merge($start, $form['formats']['#header']);
 
   // Then splice in the name of each text editor for each text format.
@@ -94,7 +94,7 @@ function editor_form_filter_admin_overview_alter(&$form, FormStateInterface $for
   foreach (Element::children($form['formats']) as $format_id) {
     $editor = editor_load($format_id);
     $editor_name = ($editor && isset($editors[$editor->getEditor()])) ? $editors[$editor->getEditor()]['label'] : '—';
-    $editor_column['editor'] = array('#markup' => $editor_name);
+    $editor_column['editor'] = ['#markup' => $editor_name];
     $position = array_search('name', array_keys($form['formats'][$format_id])) + 1;
     $start = array_splice($form['formats'][$format_id], 0, $position, $editor_column);
     $form['formats'][$format_id] = array_merge($start, $form['formats'][$format_id]);
@@ -116,37 +116,37 @@ function editor_form_filter_format_form_alter(&$form, FormStateInterface $form_s
   // Associate a text editor with this text format.
   $manager = \Drupal::service('plugin.manager.editor');
   $editor_options = $manager->listOptions();
-  $form['editor'] = array(
+  $form['editor'] = [
     // Position the editor selection before the filter settings (weight of 0),
     // but after the filter label and name (weight of -20).
     '#weight' => -9,
-  );
-  $form['editor']['editor'] = array(
+  ];
+  $form['editor']['editor'] = [
     '#type' => 'select',
     '#title' => t('Text editor'),
     '#options' => $editor_options,
     '#empty_option' => t('None'),
     '#default_value' => $editor ? $editor->getEditor() : '',
-    '#ajax' => array(
-      'trigger_as' => array('name' => 'editor_configure'),
+    '#ajax' => [
+      'trigger_as' => ['name' => 'editor_configure'],
       'callback' => 'editor_form_filter_admin_form_ajax',
       'wrapper' => 'editor-settings-wrapper',
-    ),
+    ],
     '#weight' => -10,
-  );
-  $form['editor']['configure'] = array(
+  ];
+  $form['editor']['configure'] = [
     '#type' => 'submit',
     '#name' => 'editor_configure',
     '#value' => t('Configure'),
-    '#limit_validation_errors' => array(array('editor')),
-    '#submit' => array('editor_form_filter_admin_format_editor_configure'),
-    '#ajax' => array(
+    '#limit_validation_errors' => [['editor']],
+    '#submit' => ['editor_form_filter_admin_format_editor_configure'],
+    '#ajax' => [
       'callback' => 'editor_form_filter_admin_form_ajax',
       'wrapper' => 'editor-settings-wrapper',
-    ),
+    ],
     '#weight' => -10,
-    '#attributes' => array('class' => array('js-hide')),
-  );
+    '#attributes' => ['class' => ['js-hide']],
+  ];
 
   // If there aren't any options (other than "None"), disable the select list.
   if (empty($editor_options)) {
@@ -154,27 +154,27 @@ function editor_form_filter_format_form_alter(&$form, FormStateInterface $form_s
     $form['editor']['editor']['#description'] = t('This option is disabled because no modules that provide a text editor are currently enabled.');
   }
 
-  $form['editor']['settings'] = array(
+  $form['editor']['settings'] = [
     '#tree' => TRUE,
     '#weight' => -8,
     '#type' => 'container',
     '#id' => 'editor-settings-wrapper',
-    '#attached' => array(
-      'library' => array(
+    '#attached' => [
+      'library' => [
         'editor/drupal.editor.admin',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   // Add editor-specific validation and submit handlers.
   if ($editor) {
     /** @var $plugin \Drupal\editor\Plugin\EditorPluginInterface */
     $plugin = $manager->createInstance($editor->getEditor());
-    $settings_form = array();
-    $settings_form['#element_validate'][] = array($plugin, 'validateConfigurationForm');
+    $settings_form = [];
+    $settings_form['#element_validate'][] = [$plugin, 'validateConfigurationForm'];
     $form['editor']['settings']['subform'] = $plugin->buildConfigurationForm($settings_form, $form_state);
-    $form['editor']['settings']['subform']['#parents'] = array('editor', 'settings');
-    $form['actions']['submit']['#submit'][] = array($plugin, 'submitConfigurationForm');
+    $form['editor']['settings']['subform']['#parents'] = ['editor', 'settings'];
+    $form['actions']['submit']['#submit'][] = [$plugin, 'submitConfigurationForm'];
   }
 
   $form['#validate'][] = 'editor_form_filter_admin_format_validate';
@@ -186,7 +186,7 @@ function editor_form_filter_format_form_alter(&$form, FormStateInterface $form_s
  */
 function editor_form_filter_admin_format_editor_configure($form, FormStateInterface $form_state) {
   $editor = $form_state->get('editor');
-  $editor_value = $form_state->getValue(array('editor', 'editor'));
+  $editor_value = $form_state->getValue(['editor', 'editor']);
   if ($editor_value !== NULL) {
     if ($editor_value === '') {
       $form_state->set('editor', FALSE);
@@ -236,7 +236,7 @@ function editor_form_filter_admin_format_submit($form, FormStateInterface $form_
   $format = $form_state->getFormObject()->getEntity();
   $format_id = $format->isNew() ? NULL : $format->id();
   $original_editor = editor_load($format_id);
-  if ($original_editor && $original_editor->getEditor() != $form_state->getValue(array('editor', 'editor'))) {
+  if ($original_editor && $original_editor->getEditor() != $form_state->getValue(['editor', 'editor'])) {
     $original_editor->delete();
   }
 
@@ -550,7 +550,7 @@ function editor_file_download($uri) {
  *   An array of file entity UUIDs.
  */
 function _editor_get_file_uuids_by_field(EntityInterface $entity) {
-  $uuids = array();
+  $uuids = [];
 
   $formatted_text_fields = _editor_get_formatted_text_fields($entity);
   foreach ($formatted_text_fields as $formatted_text_field) {
@@ -579,12 +579,12 @@ function _editor_get_file_uuids_by_field(EntityInterface $entity) {
 function _editor_get_formatted_text_fields(FieldableEntityInterface $entity) {
   $field_definitions = $entity->getFieldDefinitions();
   if (empty($field_definitions)) {
-    return array();
+    return [];
   }
 
   // Only return formatted text fields.
   return array_keys(array_filter($field_definitions, function (FieldDefinitionInterface $definition) {
-    return in_array($definition->getType(), array('text', 'text_long', 'text_with_summary'), TRUE);
+    return in_array($definition->getType(), ['text', 'text_long', 'text_with_summary'], TRUE);
   }));
 }
 
@@ -601,7 +601,7 @@ function _editor_get_formatted_text_fields(FieldableEntityInterface $entity) {
 function _editor_parse_file_uuids($text) {
   $dom = Html::load($text);
   $xpath = new \DOMXPath($dom);
-  $uuids = array();
+  $uuids = [];
   foreach ($xpath->query('//*[@data-entity-type="file" and @data-entity-uuid]') as $node) {
     $uuids[] = $node->getAttribute('data-entity-uuid');
   }
diff --git a/core/modules/editor/src/Ajax/EditorDialogSave.php b/core/modules/editor/src/Ajax/EditorDialogSave.php
index b4d1c27363be82977d2265b04308a6dedfe0fada..48a7867ad621d0a93d1426bdf46f0d1d17519ee2 100644
--- a/core/modules/editor/src/Ajax/EditorDialogSave.php
+++ b/core/modules/editor/src/Ajax/EditorDialogSave.php
@@ -33,10 +33,10 @@ public function __construct($values) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'editorDialogSave',
       'values' => $this->values,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/editor/src/EditorController.php b/core/modules/editor/src/EditorController.php
index 2ef0b041824570ba03856a5a9e733ff2d3c8f564..995ff7c6c50983a9e8960b292029e6708b8c35dd 100644
--- a/core/modules/editor/src/EditorController.php
+++ b/core/modules/editor/src/EditorController.php
@@ -38,7 +38,7 @@ public function getUntransformedText(EntityInterface $entity, $field_name, $lang
 
     // Direct text editing is only supported for single-valued fields.
     $field = $entity->getTranslation($langcode)->$field_name;
-    $editable_text = check_markup($field->value, $field->format, $langcode, array(FilterInterface::TYPE_TRANSFORM_REVERSIBLE, FilterInterface::TYPE_TRANSFORM_IRREVERSIBLE));
+    $editable_text = check_markup($field->value, $field->format, $langcode, [FilterInterface::TYPE_TRANSFORM_REVERSIBLE, FilterInterface::TYPE_TRANSFORM_IRREVERSIBLE]);
     $response->addCommand(new GetUntransformedTextCommand($editable_text));
 
     return $response;
diff --git a/core/modules/editor/src/EditorXssFilter/Standard.php b/core/modules/editor/src/EditorXssFilter/Standard.php
index 9a8b2b1b1e2280910bfa58ba39e6269abc2e4b65..19d5c06c6f5231b3d219a2e4fc87dfe124a538ed 100644
--- a/core/modules/editor/src/EditorXssFilter/Standard.php
+++ b/core/modules/editor/src/EditorXssFilter/Standard.php
@@ -35,7 +35,7 @@ public static function filterXss($html, FilterFormatInterface $format, FilterFor
     //   directly.
     // <iframe> is considered safe because it only allows HTML content to be
     // embedded, hence ensuring the same origin policy always applies.
-    $dangerous_tags = array('script', 'style', 'link', 'embed', 'object');
+    $dangerous_tags = ['script', 'style', 'link', 'embed', 'object'];
 
     // Simply blacklisting these five dangerous tags would bring safety, but
     // also user frustration: what if a text format is configured to allow
@@ -130,13 +130,13 @@ protected static function filterXssDataAttributes($html) {
    */
   protected static function getAllowedTags($restrictions) {
     if ($restrictions === FALSE || !isset($restrictions['allowed'])) {
-      return array();
+      return [];
     }
 
     $allowed_tags = array_keys($restrictions['allowed']);
     // Exclude the wildcard tag, which is used to set attribute restrictions on
     // all tags simultaneously.
-    $allowed_tags = array_diff($allowed_tags, array('*'));
+    $allowed_tags = array_diff($allowed_tags, ['*']);
 
     return $allowed_tags;
   }
@@ -154,7 +154,7 @@ protected static function getAllowedTags($restrictions) {
    */
   protected static function getForbiddenTags($restrictions) {
     if ($restrictions === FALSE || !isset($restrictions['forbidden_tags'])) {
-      return array();
+      return [];
     }
     else {
       return $restrictions['forbidden_tags'];
diff --git a/core/modules/editor/src/Element.php b/core/modules/editor/src/Element.php
index b83e9dc7a7f456b37aed007dd96e15deebc5ff47..901731019be0e8bff051204e5a9e64839f378a7d 100644
--- a/core/modules/editor/src/Element.php
+++ b/core/modules/editor/src/Element.php
@@ -64,14 +64,14 @@ function preRenderTextFormat(array $element) {
     if (!$element['format']['format']['#access']) {
       // Use the first (and only) available text format.
       $format_id = $format_ids[0];
-      $element['format']['editor'] = array(
+      $element['format']['editor'] = [
         '#type' => 'hidden',
         '#name' => $element['format']['format']['#name'],
         '#value' => $format_id,
-        '#attributes' => array(
+        '#attributes' => [
           'data-editor-for' => $field_id,
-        ),
-      );
+        ],
+      ];
     }
     // Otherwise, attach to text format selector.
     else {
diff --git a/core/modules/editor/src/Entity/Editor.php b/core/modules/editor/src/Entity/Editor.php
index f504cec7c8cc59cfb66e0ef1923c1a69ac1b205b..1a417d77a180bbd949440adbf82b85f54997d23f 100644
--- a/core/modules/editor/src/Entity/Editor.php
+++ b/core/modules/editor/src/Entity/Editor.php
@@ -49,14 +49,14 @@ class Editor extends ConfigEntityBase implements EditorInterface {
    *
    * @var array
    */
-  protected $settings = array();
+  protected $settings = [];
 
   /**
    * The structured array of image upload settings.
    *
    * @var array
    */
-  protected $image_upload = array();
+  protected $image_upload = [];
 
   /**
    * The filter format this text editor is associated with.
diff --git a/core/modules/editor/src/Form/EditorImageDialog.php b/core/modules/editor/src/Form/EditorImageDialog.php
index 6f1854663ca50d59304619811ea8392130be03e0..547032e67aaded7a3dc3d82d68297205b4a19f38 100644
--- a/core/modules/editor/src/Form/EditorImageDialog.php
+++ b/core/modules/editor/src/Form/EditorImageDialog.php
@@ -94,26 +94,26 @@ public function buildForm(array $form, FormStateInterface $form_state, Editor $e
     $existing_file = isset($image_element['data-entity-uuid']) ? \Drupal::entityManager()->loadEntityByUuid('file', $image_element['data-entity-uuid']) : NULL;
     $fid = $existing_file ? $existing_file->id() : NULL;
 
-    $form['fid'] = array(
+    $form['fid'] = [
       '#title' => $this->t('Image'),
       '#type' => 'managed_file',
       '#upload_location' => $image_upload['scheme'] . '://' . $image_upload['directory'],
-      '#default_value' => $fid ? array($fid) : NULL,
-      '#upload_validators' => array(
-        'file_validate_extensions' => array('gif png jpg jpeg'),
-        'file_validate_size' => array($max_filesize),
-        'file_validate_image_resolution' => array($max_dimensions),
-      ),
+      '#default_value' => $fid ? [$fid] : NULL,
+      '#upload_validators' => [
+        'file_validate_extensions' => ['gif png jpg jpeg'],
+        'file_validate_size' => [$max_filesize],
+        'file_validate_image_resolution' => [$max_dimensions],
+      ],
       '#required' => TRUE,
-    );
+    ];
 
-    $form['attributes']['src'] = array(
+    $form['attributes']['src'] = [
       '#title' => $this->t('URL'),
       '#type' => 'textfield',
       '#default_value' => isset($image_element['src']) ? $image_element['src'] : '',
       '#maxlength' => 2048,
       '#required' => TRUE,
-    );
+    ];
 
     // If the editor has image uploads enabled, show a managed_file form item,
     // otherwise show a (file URL) text form item.
@@ -137,7 +137,7 @@ public function buildForm(array $form, FormStateInterface $form_state, Editor $e
     if ($alt === '' && !empty($image_element['src'])) {
       $alt = '""';
     }
-    $form['attributes']['alt'] = array(
+    $form['attributes']['alt'] = [
       '#title' => $this->t('Alternative text'),
       '#placeholder' => $this->t('Short description for the visually impaired'),
       '#type' => 'textfield',
@@ -145,51 +145,51 @@ public function buildForm(array $form, FormStateInterface $form_state, Editor $e
       '#required_error' => $this->t('Alternative text is required.<br />(Only in rare cases should this be left empty. To create empty alternative text, enter <code>""</code> — two double quotes without any content).'),
       '#default_value' => $alt,
       '#maxlength' => 2048,
-    );
+    ];
 
     // When Drupal core's filter_align is being used, the text editor may
     // offer the ability to change the alignment.
     if (isset($image_element['data-align']) && $editor->getFilterFormat()->filters('filter_align')->status) {
-      $form['align'] = array(
+      $form['align'] = [
         '#title' => $this->t('Align'),
         '#type' => 'radios',
-        '#options' => array(
+        '#options' => [
           'none' => $this->t('None'),
           'left' => $this->t('Left'),
           'center' => $this->t('Center'),
           'right' => $this->t('Right'),
-        ),
+        ],
         '#default_value' => $image_element['data-align'] === '' ? 'none' : $image_element['data-align'],
-        '#wrapper_attributes' => array('class' => array('container-inline')),
-        '#attributes' => array('class' => array('container-inline')),
-        '#parents' => array('attributes', 'data-align'),
-      );
+        '#wrapper_attributes' => ['class' => ['container-inline']],
+        '#attributes' => ['class' => ['container-inline']],
+        '#parents' => ['attributes', 'data-align'],
+      ];
     }
 
     // When Drupal core's filter_caption is being used, the text editor may
     // offer the ability to in-place edit the image's caption: show a toggle.
     if (isset($image_element['hasCaption']) && $editor->getFilterFormat()->filters('filter_caption')->status) {
-      $form['caption'] = array(
+      $form['caption'] = [
         '#title' => $this->t('Caption'),
         '#type' => 'checkbox',
         '#default_value' => $image_element['hasCaption'] === 'true',
-        '#parents' => array('attributes', 'hasCaption'),
-      );
+        '#parents' => ['attributes', 'hasCaption'],
+      ];
     }
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions',
-    );
-    $form['actions']['save_modal'] = array(
+    ];
+    $form['actions']['save_modal'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
       // No regular submit-handler. This form only works via JavaScript.
-      '#submit' => array(),
-      '#ajax' => array(
+      '#submit' => [],
+      '#ajax' => [
         'callback' => '::submitForm',
         'event' => 'click',
-      ),
-    );
+      ],
+    ];
 
     return $form;
   }
@@ -202,22 +202,22 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
     // Convert any uploaded files from the FID values to data-entity-uuid
     // attributes and set data-entity-type to 'file'.
-    $fid = $form_state->getValue(array('fid', 0));
+    $fid = $form_state->getValue(['fid', 0]);
     if (!empty($fid)) {
       $file = $this->fileStorage->load($fid);
       $file_url = file_create_url($file->getFileUri());
       // Transform absolute image URLs to relative image URLs: prevent problems
       // on multisite set-ups and prevent mixed content errors.
       $file_url = file_url_transform_relative($file_url);
-      $form_state->setValue(array('attributes', 'src'), $file_url);
-      $form_state->setValue(array('attributes', 'data-entity-uuid'), $file->uuid());
-      $form_state->setValue(array('attributes', 'data-entity-type'), 'file');
+      $form_state->setValue(['attributes', 'src'], $file_url);
+      $form_state->setValue(['attributes', 'data-entity-uuid'], $file->uuid());
+      $form_state->setValue(['attributes', 'data-entity-type'], 'file');
     }
 
     // When the alt attribute is set to two double quotes, transform it to the
     // empty string: two double quotes signify "empty alt attribute". See above.
-    if (trim($form_state->getValue(array('attributes', 'alt'))) === '""') {
-      $form_state->setValue(array('attributes', 'alt'), '');
+    if (trim($form_state->getValue(['attributes', 'alt'])) === '""') {
+      $form_state->setValue(['attributes', 'alt'], '');
     }
 
     if ($form_state->getErrors()) {
diff --git a/core/modules/editor/src/Form/EditorLinkDialog.php b/core/modules/editor/src/Form/EditorLinkDialog.php
index 05703ba2bf9298c7fcc32358db10edc6c5148a06..724f41307be0687beaea90d3ed9b04cc63f45d53 100644
--- a/core/modules/editor/src/Form/EditorLinkDialog.php
+++ b/core/modules/editor/src/Form/EditorLinkDialog.php
@@ -32,7 +32,7 @@ public function buildForm(array $form, FormStateInterface $form_state, Editor $e
     // The default values are set directly from \Drupal::request()->request,
     // provided by the editor plugin opening the dialog.
     $user_input = $form_state->getUserInput();
-    $input = isset($user_input['editor_object']) ? $user_input['editor_object'] : array();
+    $input = isset($user_input['editor_object']) ? $user_input['editor_object'] : [];
 
     $form['#tree'] = TRUE;
     $form['#attached']['library'][] = 'editor/drupal.editor.dialog';
@@ -41,26 +41,26 @@ public function buildForm(array $form, FormStateInterface $form_state, Editor $e
 
     // Everything under the "attributes" key is merged directly into the
     // generated link tag's attributes.
-    $form['attributes']['href'] = array(
+    $form['attributes']['href'] = [
       '#title' => $this->t('URL'),
       '#type' => 'textfield',
       '#default_value' => isset($input['href']) ? $input['href'] : '',
       '#maxlength' => 2048,
-    );
+    ];
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions',
-    );
-    $form['actions']['save_modal'] = array(
+    ];
+    $form['actions']['save_modal'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
       // No regular submit-handler. This form only works via JavaScript.
-      '#submit' => array(),
-      '#ajax' => array(
+      '#submit' => [],
+      '#ajax' => [
         'callback' => '::submitForm',
         'event' => 'click',
-      ),
-    );
+      ],
+    ];
 
     return $form;
   }
diff --git a/core/modules/editor/src/Plugin/EditorBase.php b/core/modules/editor/src/Plugin/EditorBase.php
index bd429d1376d042686a6ef4b336bd12b9d1a1649d..11cf01bde8f15ecc2c256d537897242e33d582bf 100644
--- a/core/modules/editor/src/Plugin/EditorBase.php
+++ b/core/modules/editor/src/Plugin/EditorBase.php
@@ -26,7 +26,7 @@ abstract class EditorBase extends PluginBase implements EditorPluginInterface {
    * {@inheritdoc}
    */
   public function getDefaultSettings() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/editor/src/Plugin/EditorManager.php b/core/modules/editor/src/Plugin/EditorManager.php
index 5ae5bd29957a9dd005cdfda9cf62b4e456bfba2b..4585da7e721a54a84b3054edf97e3e53ee5f2b49 100644
--- a/core/modules/editor/src/Plugin/EditorManager.php
+++ b/core/modules/editor/src/Plugin/EditorManager.php
@@ -40,7 +40,7 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
    *   An array of translated text editor labels, keyed by ID.
    */
   public function listOptions() {
-    $options = array();
+    $options = [];
     foreach ($this->getDefinitions() as $key => $definition) {
       $options[$key] = $definition['label'];
     }
@@ -59,9 +59,9 @@ public function listOptions() {
    * @see \Drupal\Core\Render\AttachmentsResponseProcessorInterface::processAttachments()
    */
   public function getAttachments(array $format_ids) {
-    $attachments = array('library' => array());
+    $attachments = ['library' => []];
 
-    $settings = array();
+    $settings = [];
     foreach ($format_ids as $format_id) {
       $editor = editor_load($format_id);
       if (!$editor) {
@@ -75,20 +75,20 @@ public function getAttachments(array $format_ids) {
       $attachments['library'] = array_merge($attachments['library'], $plugin->getLibraries($editor));
 
       // Format-specific JavaScript settings.
-      $settings['editor']['formats'][$format_id] = array(
+      $settings['editor']['formats'][$format_id] = [
         'format' => $format_id,
         'editor' => $editor->getEditor(),
         'editorSettings' => $plugin->getJSSettings($editor),
         'editorSupportsContentFiltering' => $plugin_definition['supports_content_filtering'],
         'isXssSafe' => $plugin_definition['is_xss_safe'],
-      );
+      ];
     }
 
     // Allow other modules to alter all JavaScript settings.
     $this->moduleHandler->alter('editor_js_settings', $settings);
 
     if (empty($attachments['library']) && empty($settings)) {
-      return array();
+      return [];
     }
 
     $attachments['drupalSettings'] = $settings;
diff --git a/core/modules/editor/src/Plugin/Filter/EditorFileReference.php b/core/modules/editor/src/Plugin/Filter/EditorFileReference.php
index 5eb76c6303d1bf01c283e6636267c83df0132df0..cf725a71371deb09b52d16a30df795f1b3f2c306 100644
--- a/core/modules/editor/src/Plugin/Filter/EditorFileReference.php
+++ b/core/modules/editor/src/Plugin/Filter/EditorFileReference.php
@@ -68,7 +68,7 @@ public function process($text, $langcode) {
     if (stristr($text, 'data-entity-type="file"') !== FALSE) {
       $dom = Html::load($text);
       $xpath = new \DOMXPath($dom);
-      $processed_uuids = array();
+      $processed_uuids = [];
       foreach ($xpath->query('//*[@data-entity-type="file" and @data-entity-uuid]') as $node) {
         $uuid = $node->getAttribute('data-entity-uuid');
 
diff --git a/core/modules/editor/src/Plugin/InPlaceEditor/Editor.php b/core/modules/editor/src/Plugin/InPlaceEditor/Editor.php
index 5d5034293a0e958836118212366ff0e86ef0e46a..27a700bd1e7fdc7e6f3b239aa99d94fef5389449 100644
--- a/core/modules/editor/src/Plugin/InPlaceEditor/Editor.php
+++ b/core/modules/editor/src/Plugin/InPlaceEditor/Editor.php
@@ -60,7 +60,7 @@ function getMetadata(FieldItemListInterface $items) {
    */
   protected function textFormatHasTransformationFilters($format_id) {
     $format = FilterFormat::load($format_id);
-    return (bool) count(array_intersect(array(FilterInterface::TYPE_TRANSFORM_REVERSIBLE, FilterInterface::TYPE_TRANSFORM_IRREVERSIBLE), $format->getFiltertypes()));
+    return (bool) count(array_intersect([FilterInterface::TYPE_TRANSFORM_REVERSIBLE, FilterInterface::TYPE_TRANSFORM_IRREVERSIBLE], $format->getFiltertypes()));
   }
 
   /**
@@ -74,7 +74,7 @@ public function getAttachments() {
     $definitions = $manager->getDefinitions();
 
     // Filter the current user's formats to those that support inline editing.
-    $formats = array();
+    $formats = [];
     foreach ($user_format_ids as $format_id) {
       if ($editor = editor_load($format_id)) {
         $editor_id = $editor->getEditor();
diff --git a/core/modules/editor/src/Tests/EditorAdminTest.php b/core/modules/editor/src/Tests/EditorAdminTest.php
index 97d47b11e637ec3d227111737b70bbd2576708c2..4315a6dabd859cc93398f324b98741941f2792b2 100644
--- a/core/modules/editor/src/Tests/EditorAdminTest.php
+++ b/core/modules/editor/src/Tests/EditorAdminTest.php
@@ -20,7 +20,7 @@ class EditorAdminTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'editor');
+  public static $modules = ['filter', 'editor'];
 
   /**
    * A user with the 'administer filters' permission.
@@ -33,16 +33,16 @@ protected function setUp() {
     parent::setUp();
 
     // Add text format.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $filtered_html_format->save();
 
     // Create admin user.
-    $this->adminUser = $this->drupalCreateUser(array('administer filters'));
+    $this->adminUser = $this->drupalCreateUser(['administer filters']);
   }
 
   /**
@@ -83,9 +83,9 @@ public function testAddEditorToExistingFormat() {
     $this->verifyUnicornEditorConfiguration('filtered_html', FALSE);
 
     // Switch back to 'None' and check the Unicorn Editor's settings are gone.
-    $edit = array(
+    $edit = [
       'editor[editor]' => '',
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, 'editor_configure');
     $unicorn_setting = $this->xpath('//input[@name="editor[settings][ponies_too]" and @type="checkbox" and @checked]');
     $this->assertTrue(count($unicorn_setting) === 0, "Unicorn Editor's settings form is no longer present.");
@@ -135,7 +135,7 @@ public function testDisableFormatWithEditor() {
     $this->drupalLogin($account);
 
     // The node edit page header.
-    $text = t('<em>Edit @type</em> @title', array('@type' => $node_type->label(), '@title' => $node->label()));
+    $text = t('<em>Edit @type</em> @title', ['@type' => $node_type->label(), '@title' => $node->label()]);
 
     // Go to node edit form.
     $this->drupalGet('node/' . $node->id() . '/edit');
@@ -162,10 +162,10 @@ protected function addEditorToNewFormat($format_id, $format_name) {
     $this->drupalLogin($this->adminUser);
     $this->drupalGet('admin/config/content/formats/add');
     // Configure the text format name.
-    $edit = array(
+    $edit = [
       'name' => $format_name,
       'format' => $format_id,
-    );
+    ];
     $edit += $this->selectUnicornEditor();
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
   }
@@ -175,7 +175,7 @@ protected function addEditorToNewFormat($format_id, $format_name) {
    */
   protected function enableUnicornEditor() {
     if (!$this->container->get('module_handler')->moduleExists('editor_test')) {
-      $this->container->get('module_installer')->install(array('editor_test'));
+      $this->container->get('module_installer')->install(['editor_test']);
     }
   }
 
@@ -200,9 +200,9 @@ protected function selectUnicornEditor() {
     $this->assertNoRaw(t('This option is disabled because no modules that provide a text editor are currently enabled.'), 'Description for select absent that tells users to install a text editor module.');
 
     // Select the "Unicorn Editor" editor and click the "Configure" button.
-    $edit = array(
+    $edit = [
       'editor[editor]' => 'unicorn',
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, 'editor_configure');
     $unicorn_setting = $this->xpath('//input[@name="editor[settings][ponies_too]" and @type="checkbox" and @checked]');
     $this->assertTrue(count($unicorn_setting), "Unicorn Editor's settings form is present.");
diff --git a/core/modules/editor/src/Tests/EditorLoadingTest.php b/core/modules/editor/src/Tests/EditorLoadingTest.php
index 88055e916a593ee210c74d9acf9d42c315be6b44..419215f8732f9ba064e5bd21a29c6ac4eb8625a0 100644
--- a/core/modules/editor/src/Tests/EditorLoadingTest.php
+++ b/core/modules/editor/src/Tests/EditorLoadingTest.php
@@ -20,7 +20,7 @@ class EditorLoadingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'editor', 'editor_test', 'node');
+  public static $modules = ['filter', 'editor', 'editor_test', 'node'];
 
   /**
    * An untrusted user, with access to the 'plain_text' format.
@@ -51,57 +51,57 @@ protected function setUp() {
     \Drupal::service('plugin.manager.editor')->clearCachedDefinitions();
 
     // Add text formats.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $filtered_html_format->save();
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
       'weight' => 1,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $full_html_format->save();
 
     // Create article node type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'article',
       'name' => 'Article',
-    ));
+    ]);
 
     // Create page node type, but remove the body.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'page',
       'name' => 'Page',
-    ));
+    ]);
     $body = FieldConfig::loadByName('node', 'page', 'body');
     $body->delete();
 
     // Create a formatted text field, which uses an <input type="text">.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_text',
       'entity_type' => 'node',
       'type' => 'text',
-    ))->save();
+    ])->save();
 
-    FieldConfig::create(array(
+    FieldConfig::create([
       'field_name' => 'field_text',
       'entity_type' => 'node',
       'label' => 'Textfield',
       'bundle' => 'page',
-    ))->save();
+    ])->save();
 
     entity_get_form_display('node', 'page', 'default')
       ->setComponent('field_text')
       ->save();
 
     // Create 3 users, each with access to different text formats.
-    $this->untrustedUser = $this->drupalCreateUser(array('create article content', 'edit any article content'));
-    $this->normalUser = $this->drupalCreateUser(array('create article content', 'edit any article content', 'use text format filtered_html'));
-    $this->privilegedUser = $this->drupalCreateUser(array('create article content', 'edit any article content', 'create page content', 'edit any page content', 'use text format filtered_html', 'use text format full_html'));
+    $this->untrustedUser = $this->drupalCreateUser(['create article content', 'edit any article content']);
+    $this->normalUser = $this->drupalCreateUser(['create article content', 'edit any article content', 'use text format filtered_html']);
+    $this->privilegedUser = $this->drupalCreateUser(['create article content', 'edit any article content', 'create page content', 'edit any page content', 'use text format filtered_html', 'use text format full_html']);
   }
 
   /**
@@ -112,13 +112,13 @@ public function testLoading() {
     $editor = Editor::create([
       'format' => 'full_html',
       'editor' => 'unicorn',
-      'image_upload' => array(
+      'image_upload' => [
         'status' => FALSE,
         'scheme' => file_default_scheme(),
         'directory' => 'inline-images',
         'max_size' => '',
-        'max_dimensions' => array('width' => '', 'height' => ''),
-      )
+        'max_dimensions' => ['width' => '', 'height' => ''],
+      ]
     ]);
     $editor->save();
 
@@ -140,13 +140,13 @@ public function testLoading() {
     $this->drupalLogin($this->privilegedUser);
     $this->drupalGet('node/add/article');
     list($settings, $editor_settings_present, $editor_js_present, $body, $format_selector) = $this->getThingsToCheck('body');
-    $expected = array('formats' => array('full_html' => array(
+    $expected = ['formats' => ['full_html' => [
       'format' => 'full_html',
       'editor' => 'unicorn',
-      'editorSettings' => array('ponyModeEnabled' => TRUE),
+      'editorSettings' => ['ponyModeEnabled' => TRUE],
       'editorSupportsContentFiltering' => TRUE,
       'isXssSafe' => FALSE,
-    )));
+    ]]];
     $this->assertTrue($editor_settings_present, "Text Editor module's JavaScript settings are on the page.");
     $this->assertIdentical($expected, $settings['editor'], "Text Editor module's JavaScript settings on the page are correct.");
     $this->assertTrue($editor_js_present, 'Text Editor JavaScript is present.');
@@ -174,13 +174,13 @@ public function testLoading() {
     $this->drupalLogin($this->untrustedUser);
     $this->drupalGet('node/add/article');
     list($settings, $editor_settings_present, $editor_js_present, $body, $format_selector) = $this->getThingsToCheck('body');
-    $expected = array('formats' => array('plain_text' => array(
+    $expected = ['formats' => ['plain_text' => [
       'format' => 'plain_text',
       'editor' => 'unicorn',
-      'editorSettings' => array('ponyModeEnabled' => TRUE),
+      'editorSettings' => ['ponyModeEnabled' => TRUE],
       'editorSupportsContentFiltering' => TRUE,
       'isXssSafe' => FALSE,
-    )));
+    ]]];
     $this->assertTrue($editor_settings_present, "Text Editor module's JavaScript settings are on the page.");
     $this->assertIdentical($expected, $settings['editor'], "Text Editor module's JavaScript settings on the page are correct.");
     $this->assertTrue($editor_js_present, 'Text Editor JavaScript is present.');
@@ -191,12 +191,12 @@ public function testLoading() {
 
     // Create an "article" node that uses the full_html text format, then try
     // to let the untrusted user edit it.
-    $this->drupalCreateNode(array(
+    $this->drupalCreateNode([
       'type' => 'article',
-      'body' => array(
-        array('value' => $this->randomMachineName(32), 'format' => 'full_html')
-      ),
-    ));
+      'body' => [
+        ['value' => $this->randomMachineName(32), 'format' => 'full_html']
+      ],
+    ]);
 
     // The untrusted user tries to edit content that is written in a text format
     // that (s)he is not allowed to use. The editor is still loaded. CKEditor,
@@ -220,23 +220,23 @@ public function testSupportedElementTypes() {
     $editor = Editor::create([
       'format' => 'full_html',
       'editor' => 'unicorn',
-      'image_upload' => array(
+      'image_upload' => [
         'status' => FALSE,
         'scheme' => file_default_scheme(),
         'directory' => 'inline-images',
         'max_size' => '',
-        'max_dimensions' => array('width' => '', 'height' => ''),
-      )
+        'max_dimensions' => ['width' => '', 'height' => ''],
+      ]
     ]);
     $editor->save();
 
     // Create an "page" node that uses the full_html text format.
-    $this->drupalCreateNode(array(
+    $this->drupalCreateNode([
       'type' => 'page',
-      'field_text' => array(
-        array('value' => $this->randomMachineName(32), 'format' => 'full_html')
-      ),
-    ));
+      'field_text' => [
+        ['value' => $this->randomMachineName(32), 'format' => 'full_html']
+      ],
+    ]);
 
     // Assert the unicorn editor works with textfields.
     $this->drupalLogin($this->privilegedUser);
@@ -268,7 +268,7 @@ public function testSupportedElementTypes() {
 
   protected function getThingsToCheck($field_name, $type = 'textarea') {
     $settings = $this->getDrupalSettings();
-    return array(
+    return [
       // JavaScript settings.
       $settings,
       // Editor.module's JS settings present.
@@ -279,7 +279,7 @@ protected function getThingsToCheck($field_name, $type = 'textarea') {
       $this->xpath('//' . $type . '[@id="edit-' . $field_name . '-0-value"]'),
       // Format selector.
       $this->xpath('//select[contains(@class, "filter-list")]'),
-    );
+    ];
   }
 
 }
diff --git a/core/modules/editor/src/Tests/EditorSecurityTest.php b/core/modules/editor/src/Tests/EditorSecurityTest.php
index c771439c6978debc26e5ce3c086a0d055ec550b0..0c29a58d5ba84c7ce31f226f193d7725dba5eecc 100644
--- a/core/modules/editor/src/Tests/EditorSecurityTest.php
+++ b/core/modules/editor/src/Tests/EditorSecurityTest.php
@@ -40,7 +40,7 @@ class EditorSecurityTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'editor', 'editor_test', 'node');
+  public static $modules = ['filter', 'editor', 'editor_test', 'node'];
 
   /**
    * User with access to Restricted HTML text format without text editor.
@@ -83,74 +83,74 @@ protected function setUp() {
     // With text formats 2, 3 and 5, we also associate a text editor that does
     // not guarantee XSS safety. "restricted" means the text format has XSS
     // filters on output, "unrestricted" means the opposite.
-    $format = FilterFormat::create(array(
+    $format = FilterFormat::create([
       'format' => 'restricted_without_editor',
       'name' => 'Restricted HTML, without text editor',
       'weight' => 0,
-      'filters' => array(
+      'filters' => [
         // A filter of the FilterInterface::TYPE_HTML_RESTRICTOR type.
-        'filter_html' => array(
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<h2> <h3> <h4> <h5> <h6> <p> <br> <strong> <a>',
-          )
-        ),
-      ),
-    ));
+          ]
+        ],
+      ],
+    ]);
     $format->save();
-    $format = FilterFormat::create(array(
+    $format = FilterFormat::create([
       'format' => 'restricted_with_editor',
       'name' => 'Restricted HTML, with text editor',
       'weight' => 1,
-      'filters' => array(
+      'filters' => [
         // A filter of the FilterInterface::TYPE_HTML_RESTRICTOR type.
-        'filter_html' => array(
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<h2> <h3> <h4> <h5> <h6> <p> <br> <strong> <a>',
-          )
-        ),
-      ),
-    ));
+          ]
+        ],
+      ],
+    ]);
     $format->save();
     $editor = Editor::create([
       'format' => 'restricted_with_editor',
       'editor' => 'unicorn',
     ]);
     $editor->save();
-    $format = FilterFormat::create(array(
+    $format = FilterFormat::create([
       'format' => 'restricted_plus_dangerous_tag_with_editor',
       'name' => 'Restricted HTML, dangerous tag allowed, with text editor',
       'weight' => 1,
-      'filters' => array(
+      'filters' => [
         // A filter of the FilterInterface::TYPE_HTML_RESTRICTOR type.
-        'filter_html' => array(
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<h2> <h3> <h4> <h5> <h6> <p> <br> <strong> <a> <embed>',
-          )
-        ),
-      ),
-    ));
+          ]
+        ],
+      ],
+    ]);
     $format->save();
     $editor = Editor::create([
       'format' => 'restricted_plus_dangerous_tag_with_editor',
       'editor' => 'unicorn',
     ]);
     $editor->save();
-    $format = FilterFormat::create(array(
+    $format = FilterFormat::create([
       'format' => 'unrestricted_without_editor',
       'name' => 'Unrestricted HTML, without text editor',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $format->save();
-    $format = FilterFormat::create(array(
+    $format = FilterFormat::create([
       'format' => 'unrestricted_with_editor',
       'name' => 'Unrestricted HTML, with text editor',
       'weight' => 1,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $format->save();
     $editor = Editor::create([
       'format' => 'unrestricted_with_editor',
@@ -160,10 +160,10 @@ protected function setUp() {
 
 
     // Create node type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'article',
       'name' => 'Article',
-    ));
+    ]);
 
     // Create 4 users, each with access to different text formats/editors:
     //   - "untrusted": restricted_without_editor
@@ -172,22 +172,22 @@ protected function setUp() {
     //   - "privileged": restricted_without_editor, restricted_with_editor,
     //     restricted_plus_dangerous_tag_with_editor,
     //     unrestricted_without_editor and unrestricted_with_editor
-    $this->untrustedUser = $this->drupalCreateUser(array(
+    $this->untrustedUser = $this->drupalCreateUser([
       'create article content',
       'edit any article content',
       'use text format restricted_without_editor',
-    ));
-    $this->normalUser = $this->drupalCreateUser(array(
+    ]);
+    $this->normalUser = $this->drupalCreateUser([
       'create article content',
       'edit any article content',
       'use text format restricted_with_editor',
-    ));
-    $this->trustedUser = $this->drupalCreateUser(array(
+    ]);
+    $this->trustedUser = $this->drupalCreateUser([
       'create article content',
       'edit any article content',
       'use text format restricted_plus_dangerous_tag_with_editor',
-    ));
-    $this->privilegedUser = $this->drupalCreateUser(array(
+    ]);
+    $this->privilegedUser = $this->drupalCreateUser([
       'create article content',
       'edit any article content',
       'use text format restricted_without_editor',
@@ -195,25 +195,25 @@ protected function setUp() {
       'use text format restricted_plus_dangerous_tag_with_editor',
       'use text format unrestricted_without_editor',
       'use text format unrestricted_with_editor',
-    ));
+    ]);
 
     // Create an "article" node for each possible text format, with the same
     // sample content, to do our tests on.
-    $samples = array(
-      array('author' => $this->untrustedUser->id(), 'format' => 'restricted_without_editor'),
-      array('author' => $this->normalUser->id(), 'format' => 'restricted_with_editor'),
-      array('author' => $this->trustedUser->id(), 'format' => 'restricted_plus_dangerous_tag_with_editor'),
-      array('author' => $this->privilegedUser->id(), 'format' => 'unrestricted_without_editor'),
-      array('author' => $this->privilegedUser->id(), 'format' => 'unrestricted_with_editor'),
-    );
+    $samples = [
+      ['author' => $this->untrustedUser->id(), 'format' => 'restricted_without_editor'],
+      ['author' => $this->normalUser->id(), 'format' => 'restricted_with_editor'],
+      ['author' => $this->trustedUser->id(), 'format' => 'restricted_plus_dangerous_tag_with_editor'],
+      ['author' => $this->privilegedUser->id(), 'format' => 'unrestricted_without_editor'],
+      ['author' => $this->privilegedUser->id(), 'format' => 'unrestricted_with_editor'],
+    ];
     foreach ($samples as $sample) {
-      $this->drupalCreateNode(array(
+      $this->drupalCreateNode([
         'type' => 'article',
-        'body' => array(
-          array('value' => self::$sampleContent, 'format' => $sample['format'])
-        ),
+        'body' => [
+          ['value' => self::$sampleContent, 'format' => $sample['format']]
+        ],
         'uid' => $sample['author']
-      ));
+      ]);
     }
   }
 
@@ -223,64 +223,64 @@ protected function setUp() {
    * Tests 8 scenarios. Tests only with a text editor that is not XSS-safe.
    */
   function testInitialSecurity() {
-    $expected = array(
-      array(
+    $expected = [
+      [
         'node_id' => 1,
         'format' => 'restricted_without_editor',
         // No text editor => no XSS filtering.
         'value' => self::$sampleContent,
-        'users' => array(
+        'users' => [
           $this->untrustedUser,
           $this->privilegedUser,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'node_id' => 2,
         'format' => 'restricted_with_editor',
         // Text editor => XSS filtering.
         'value' => self::$sampleContentSecured,
-        'users' => array(
+        'users' => [
           $this->normalUser,
           $this->privilegedUser,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'node_id' => 3,
         'format' => 'restricted_plus_dangerous_tag_with_editor',
         // Text editor => XSS filtering.
         'value' => self::$sampleContentSecuredEmbedAllowed,
-        'users' => array(
+        'users' => [
           $this->trustedUser,
           $this->privilegedUser,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'node_id' => 4,
         'format' => 'unrestricted_without_editor',
         // No text editor => no XSS filtering.
         'value' => self::$sampleContent,
-        'users' => array(
+        'users' => [
           $this->privilegedUser,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'node_id' => 5,
         'format' => 'unrestricted_with_editor',
         // Text editor, no security filter => no XSS filtering.
         'value' => self::$sampleContent,
-        'users' => array(
+        'users' => [
           $this->privilegedUser,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     // Log in as each user that may edit the content, and assert the value.
     foreach ($expected as $case) {
       foreach ($case['users'] as $account) {
-        $this->pass(format_string('Scenario: sample %sample_id, %format.', array(
+        $this->pass(format_string('Scenario: sample %sample_id, %format.', [
           '%sample_id' => $case['node_id'],
           '%format' => $case['format'],
-        )));
+        ]));
         $this->drupalLogin($account);
         $this->drupalGet('node/' . $case['node_id'] . '/edit');
         $dom_node = $this->xpath('//textarea[@id="edit-body-0-value"]');
@@ -303,25 +303,25 @@ function testInitialSecurity() {
    * <script> tag would be executed. Unless we apply appropriate filtering.
    */
   function testSwitchingSecurity() {
-    $expected = array(
-      array(
+    $expected = [
+      [
         'node_id' => 1,
         'value' => self::$sampleContent, // No text editor => no XSS filtering.
         'format' => 'restricted_without_editor',
-        'switch_to' => array(
+        'switch_to' => [
           'restricted_with_editor' => self::$sampleContentSecured,
           // Intersection of restrictions => most strict XSS filtering.
           'restricted_plus_dangerous_tag_with_editor' => self::$sampleContentSecured,
           // No text editor => no XSS filtering.
           'unrestricted_without_editor' => FALSE,
           'unrestricted_with_editor' => self::$sampleContentSecured,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'node_id' => 2,
         'value' => self::$sampleContentSecured, // Text editor => XSS filtering.
         'format' => 'restricted_with_editor',
-        'switch_to' => array(
+        'switch_to' => [
           // No text editor => no XSS filtering.
           'restricted_without_editor' => FALSE,
           // Intersection of restrictions => most strict XSS filtering.
@@ -329,13 +329,13 @@ function testSwitchingSecurity() {
           // No text editor => no XSS filtering.
           'unrestricted_without_editor' => FALSE,
           'unrestricted_with_editor' => self::$sampleContentSecured,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'node_id' => 3,
         'value' => self::$sampleContentSecuredEmbedAllowed, // Text editor => XSS filtering.
         'format' => 'restricted_plus_dangerous_tag_with_editor',
-        'switch_to' => array(
+        'switch_to' => [
           // No text editor => no XSS filtering.
           'restricted_without_editor' => FALSE,
           // Intersection of restrictions => most strict XSS filtering.
@@ -344,13 +344,13 @@ function testSwitchingSecurity() {
           'unrestricted_without_editor' => FALSE,
           // Intersection of restrictions => most strict XSS filtering.
           'unrestricted_with_editor' => self::$sampleContentSecured,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'node_id' => 4,
         'value' => self::$sampleContent, // No text editor => no XSS filtering.
         'format' => 'unrestricted_without_editor',
-        'switch_to' => array(
+        'switch_to' => [
           // No text editor => no XSS filtering.
           'restricted_without_editor' => FALSE,
           'restricted_with_editor' => self::$sampleContentSecured,
@@ -360,13 +360,13 @@ function testSwitchingSecurity() {
           // filters: resulting content when viewed was already vulnerable, so
           // it must be intentional.
           'unrestricted_with_editor' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'node_id' => 5,
         'value' => self::$sampleContentSecured, // Text editor => XSS filtering.
         'format' => 'unrestricted_with_editor',
-        'switch_to' => array(
+        'switch_to' => [
           // From editor, no security filters to security filters, no editor: no
           // risk.
           'restricted_without_editor' => FALSE,
@@ -377,9 +377,9 @@ function testSwitchingSecurity() {
           // filters: resulting content when viewed was already vulnerable, so
           // it must be intentional.
           'unrestricted_without_editor' => FALSE,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     // Log in as the privileged user, and for every sample, do the following:
     //  - switch to every other text format/editor
@@ -395,15 +395,15 @@ function testSwitchingSecurity() {
 
       // Switch to every other text format/editor and verify the results.
       foreach ($case['switch_to'] as $format => $expected_filtered_value) {
-        $this->pass(format_string('Scenario: sample %sample_id, switch from %original_format to %format.', array(
+        $this->pass(format_string('Scenario: sample %sample_id, switch from %original_format to %format.', [
           '%sample_id' => $case['node_id'],
           '%original_format' => $case['format'],
           '%format' => $format,
-        )));
-        $post = array(
+        ]));
+        $post = [
           'value' => self::$sampleContent,
           'original_format_id' => $case['format'],
-        );
+        ];
         $response = $this->drupalPostWithFormat('editor/filter_xss/' . $format, 'json', $post);
         $this->assertResponse(200);
         $json = Json::decode($response);
diff --git a/core/modules/editor/src/Tests/QuickEditIntegrationLoadingTest.php b/core/modules/editor/src/Tests/QuickEditIntegrationLoadingTest.php
index c827450aeb089d598141d6e178de93fabd1dc205..a4515d567300f79313c567c5fefb255e538f771e 100644
--- a/core/modules/editor/src/Tests/QuickEditIntegrationLoadingTest.php
+++ b/core/modules/editor/src/Tests/QuickEditIntegrationLoadingTest.php
@@ -19,47 +19,47 @@ class QuickEditIntegrationLoadingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('quickedit', 'filter', 'node', 'editor');
+  public static $modules = ['quickedit', 'filter', 'node', 'editor'];
 
   /**
    * The basic permissions necessary to view content and use in-place editing.
    *
    * @var array
    */
-  protected static $basicPermissions = array('access content', 'create article content', 'use text format filtered_html', 'access contextual links');
+  protected static $basicPermissions = ['access content', 'create article content', 'use text format filtered_html', 'access contextual links'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create a text format.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(
-        'filter_caption' => array(
+      'filters' => [
+        'filter_caption' => [
           'status' => 1,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $filtered_html_format->save();
 
     // Create a node type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'article',
       'name' => 'Article',
-    ));
+    ]);
 
     // Create one node of the above node type using the above text format.
-    $this->drupalCreateNode(array(
+    $this->drupalCreateNode([
       'type' => 'article',
-      'body' => array(
-        0 => array(
+      'body' => [
+        0 => [
           'value' => '<p>Do you also love Drupal?</p><img src="druplicon.png" data-caption="Druplicon" />',
           'format' => 'filtered_html',
-        )
-      )
-    ));
+        ]
+      ]
+    ]);
   }
 
   /**
@@ -70,11 +70,11 @@ public function testUsersWithoutPermission() {
     // or both of the following permissions:
     // - the 'access in-place editing' permission
     // - the 'edit any article content' permission (necessary to edit node 1)
-    $users = array(
+    $users = [
       $this->drupalCreateUser(static::$basicPermissions),
-      $this->drupalCreateUser(array_merge(static::$basicPermissions, array('edit any article content'))),
-      $this->drupalCreateUser(array_merge(static::$basicPermissions, array('access in-place editing')))
-    );
+      $this->drupalCreateUser(array_merge(static::$basicPermissions, ['edit any article content'])),
+      $this->drupalCreateUser(array_merge(static::$basicPermissions, ['access in-place editing']))
+    ];
 
     // Now test with each of the 3 users with insufficient permissions.
     foreach ($users as $user) {
@@ -86,7 +86,7 @@ public function testUsersWithoutPermission() {
 
       // Retrieving the untransformed text should result in an 403 response and
       // return a different error message depending of the missing permission.
-      $response = $this->drupalPost('editor/' . 'node/1/body/en/full', '', array(), array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax')));
+      $response = $this->drupalPost('editor/' . 'node/1/body/en/full', '', [], ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
       $this->assertResponse(403);
       if (!$user->hasPermission('access in-place editing')) {
         $message = "The 'access in-place editing' permission is required.";
@@ -102,7 +102,7 @@ public function testUsersWithoutPermission() {
    * Test loading of untransformed text when a user does have access to it.
    */
   public function testUserWithPermission() {
-    $user = $this->drupalCreateUser(array_merge(static::$basicPermissions, array('edit any article content', 'access in-place editing')));
+    $user = $this->drupalCreateUser(array_merge(static::$basicPermissions, ['edit any article content', 'access in-place editing']));
     $this->drupalLogin($user);
     $this->drupalGet('node/1');
 
diff --git a/core/modules/editor/tests/modules/src/Plugin/Editor/TRexEditor.php b/core/modules/editor/tests/modules/src/Plugin/Editor/TRexEditor.php
index e78536950d451a4212660ed110a441da90f41caf..0d787a8d896a4d88bf8421dab4e64ffef54bfde8 100644
--- a/core/modules/editor/tests/modules/src/Plugin/Editor/TRexEditor.php
+++ b/core/modules/editor/tests/modules/src/Plugin/Editor/TRexEditor.php
@@ -26,18 +26,18 @@ class TRexEditor extends EditorBase {
    * {@inheritdoc}
    */
   public function getDefaultSettings() {
-    return array('stumpy_arms' => TRUE);
+    return ['stumpy_arms' => TRUE];
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state, Editor $editor) {
-    $form['stumpy_arms'] = array(
+    $form['stumpy_arms'] = [
       '#title' => t('Stumpy arms'),
       '#type' => 'checkbox',
       '#default_value' => TRUE,
-    );
+    ];
     return $form;
   }
 
@@ -45,7 +45,7 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
    * {@inheritdoc}
    */
   public function getJSSettings(Editor $editor) {
-    $js_settings = array();
+    $js_settings = [];
     $settings = $editor->getSettings();
     if ($settings['stumpy_arms']) {
       $js_settings['doMyArmsLookStumpy'] = TRUE;
@@ -57,9 +57,9 @@ public function getJSSettings(Editor $editor) {
    * {@inheritdoc}
    */
   public function getLibraries(Editor $editor) {
-    return array(
+    return [
       'editor_test/trex',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/editor/tests/modules/src/Plugin/Editor/UnicornEditor.php b/core/modules/editor/tests/modules/src/Plugin/Editor/UnicornEditor.php
index c196751ef30ad691f5b454f9e9743e48aed052a4..ddc730cb36ba3bcc5ebc543952a5599f6194c1e8 100644
--- a/core/modules/editor/tests/modules/src/Plugin/Editor/UnicornEditor.php
+++ b/core/modules/editor/tests/modules/src/Plugin/Editor/UnicornEditor.php
@@ -27,18 +27,18 @@ class UnicornEditor extends EditorBase {
    * {@inheritdoc}
    */
   function getDefaultSettings() {
-    return array('ponies_too' => TRUE);
+    return ['ponies_too' => TRUE];
   }
 
   /**
    * {@inheritdoc}
    */
   function settingsForm(array $form, FormStateInterface $form_state, Editor $editor) {
-    $form['ponies_too'] = array(
+    $form['ponies_too'] = [
       '#title' => t('Pony mode'),
       '#type' => 'checkbox',
       '#default_value' => TRUE,
-    );
+    ];
     return $form;
   }
 
@@ -46,7 +46,7 @@ function settingsForm(array $form, FormStateInterface $form_state, Editor $edito
    * {@inheritdoc}
    */
   function getJSSettings(Editor $editor) {
-    $js_settings = array();
+    $js_settings = [];
     $settings = $editor->getSettings();
     if ($settings['ponies_too']) {
       $js_settings['ponyModeEnabled'] = TRUE;
@@ -58,9 +58,9 @@ function getJSSettings(Editor $editor) {
    * {@inheritdoc}
    */
   public function getLibraries(Editor $editor) {
-    return array(
+    return [
       'editor_test/unicorn',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/editor/tests/src/Kernel/EditorFileReferenceFilterTest.php b/core/modules/editor/tests/src/Kernel/EditorFileReferenceFilterTest.php
index 51eee9731c6f5c425de2b9f25f679048e3920d5a..621aabe4bdec3e0f2676ba4b988b34561582809a 100644
--- a/core/modules/editor/tests/src/Kernel/EditorFileReferenceFilterTest.php
+++ b/core/modules/editor/tests/src/Kernel/EditorFileReferenceFilterTest.php
@@ -19,7 +19,7 @@ class EditorFileReferenceFilterTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'filter', 'editor', 'field', 'file', 'user');
+  public static $modules = ['system', 'filter', 'editor', 'field', 'file', 'user'];
 
   /**
    * @var \Drupal\filter\Plugin\FilterInterface[]
@@ -31,12 +31,12 @@ class EditorFileReferenceFilterTest extends KernelTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
     $this->installEntitySchema('file');
-    $this->installSchema('file', array('file_usage'));
+    $this->installSchema('file', ['file_usage']);
 
     $manager = $this->container->get('plugin.manager.filter');
-    $bag = new FilterPluginCollection($manager, array());
+    $bag = new FilterPluginCollection($manager, []);
     $this->filters = $bag->getAll();
   }
 
@@ -99,7 +99,7 @@ function testEditorFileReferenceFilter() {
     $input = '<img src="llama.jpg" data-entity-type="file" data-entity-uuid="invalid-' . $uuid . '" />';
     $output = $test($input);
     $this->assertIdentical($input, $output->getProcessedText());
-    $this->assertEqual(array(), $output->getCacheTags());
+    $this->assertEqual([], $output->getCacheTags());
 
     $this->pass('Two different data-entity-uuid attributes.');
     $input = '<img src="llama.jpg" data-entity-type="file" data-entity-uuid="' . $uuid . '" />';
diff --git a/core/modules/editor/tests/src/Kernel/EditorFileUsageTest.php b/core/modules/editor/tests/src/Kernel/EditorFileUsageTest.php
index 04113880cdb43811767d0e421eea297a738170e7..aac665d61b5c66e4de7e76f1ec1e8c1d43d448fd 100644
--- a/core/modules/editor/tests/src/Kernel/EditorFileUsageTest.php
+++ b/core/modules/editor/tests/src/Kernel/EditorFileUsageTest.php
@@ -23,22 +23,22 @@ class EditorFileUsageTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('editor', 'editor_test', 'node', 'file');
+  public static $modules = ['editor', 'editor_test', 'node', 'file'];
 
   protected function setUp() {
     parent::setUp();
     $this->installEntitySchema('file');
-    $this->installSchema('node', array('node_access'));
-    $this->installSchema('file', array('file_usage'));
+    $this->installSchema('node', ['node_access']);
+    $this->installSchema('file', ['file_usage']);
     $this->installConfig(['node']);
 
     // Add text formats.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $filtered_html_format->save();
 
     // Set cardinality for body field.
@@ -63,13 +63,13 @@ protected function setUp() {
    * Tests the configurable text editor manager.
    */
   public function testEditorEntityHooks() {
-    $image_paths = array(
+    $image_paths = [
       0 => 'core/misc/druplicon.png',
       1 => 'core/misc/tree.png',
       2 => 'core/misc/help.png',
-    );
+    ];
 
-    $image_entities = array();
+    $image_entities = [];
     foreach ($image_paths as $key => $image_path) {
       $image = File::create();
       $image->setFileUri($image_path);
@@ -77,12 +77,12 @@ public function testEditorEntityHooks() {
       $image->save();
 
       $file_usage = $this->container->get('file.usage');
-      $this->assertIdentical(array(), $file_usage->listUsage($image), 'The image ' . $image_paths[$key] . ' has zero usages.');
+      $this->assertIdentical([], $file_usage->listUsage($image), 'The image ' . $image_paths[$key] . ' has zero usages.');
 
       $image_entities[] = $image;
     }
 
-    $body = array();
+    $body = [];
     foreach ($image_entities as $key => $image_entity) {
       // Don't be rude, say hello.
       $body_value = '<p>Hello, world!</p>';
@@ -95,10 +95,10 @@ public function testEditorEntityHooks() {
       // Test handling of a non-existing UUID.
       $body_value .= '<img src="awesome-llama-' . $key . '.jpg" data-entity-type="file" data-entity-uuid="30aac704-ba2c-40fc-b609-9ed121aa90f4" />';
 
-      $body[] = array(
+      $body[] = [
         'value' => $body_value,
         'format' => 'filtered_html',
-      );
+      ];
     }
 
     // Test editor_entity_insert(): increment.
@@ -111,7 +111,7 @@ public function testEditorEntityHooks() {
     ]);
     $node->save();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '1'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 1 usage.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '1']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 1 usage.');
     }
 
     // Test editor_entity_update(): increment, twice, by creating new revisions.
@@ -121,12 +121,12 @@ public function testEditorEntityHooks() {
     $node->setNewRevision(TRUE);
     $node->save();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '3'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 3 usages.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '3']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 3 usages.');
     }
 
     // Test hook_entity_update(): decrement, by modifying the last revision:
     // remove the data-entity-type attribute from the body field.
-    $original_values = array();
+    $original_values = [];
     for ($i = 0; $i < count($image_entities); $i++) {
       $original_value = $node->body[$i]->value;
       $new_value = str_replace('data-entity-type', 'data-entity-type-modified', $original_value);
@@ -135,7 +135,7 @@ public function testEditorEntityHooks() {
     }
     $node->save();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '2'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '2']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
     }
 
     // Test editor_entity_update(): increment again by creating a new revision:
@@ -146,7 +146,7 @@ public function testEditorEntityHooks() {
     }
     $node->save();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '3'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 3 usages.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '3']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 3 usages.');
     }
 
     // Test hook_entity_update(): decrement, by modifying the last revision:
@@ -158,7 +158,7 @@ public function testEditorEntityHooks() {
     }
     $node->save();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '2'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '2']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
     }
 
     // Test hook_entity_update(): increment, by modifying the last revision:
@@ -168,13 +168,13 @@ public function testEditorEntityHooks() {
     }
     $node->save();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '3'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 3 usages.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '3']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 3 usages.');
     }
 
     // Test editor_entity_revision_delete(): decrement, by deleting a revision.
     $this->container->get('entity_type.manager')->getStorage('node')->deleteRevision($second_revision_id);
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '2'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '2']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
     }
 
     // Populate both the body and summary. Because this will be the same
@@ -185,7 +185,7 @@ public function testEditorEntityHooks() {
     }
     $node->save();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '2'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '2']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
     }
 
     // Empty out the body value, but keep the summary. The number of usages
@@ -196,13 +196,13 @@ public function testEditorEntityHooks() {
     }
     $node->save();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array('editor' => array('node' => array(1 => '2'))), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
+      $this->assertIdentical(['editor' => ['node' => [1 => '2']]], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has 2 usages.');
     }
 
     // Test editor_entity_delete().
     $node->delete();
     foreach ($image_entities as $key => $image_entity) {
-      $this->assertIdentical(array(), $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has zero usages again.');
+      $this->assertIdentical([], $file_usage->listUsage($image_entity), 'The image ' . $image_paths[$key] . ' has zero usages again.');
     }
   }
 
diff --git a/core/modules/editor/tests/src/Kernel/EditorImageDialogTest.php b/core/modules/editor/tests/src/Kernel/EditorImageDialogTest.php
index 329018b9e5deb377c35f4325b3824afc93ccc09c..6500d1adefd0c388b61ad3179b11626f98078c4a 100644
--- a/core/modules/editor/tests/src/Kernel/EditorImageDialogTest.php
+++ b/core/modules/editor/tests/src/Kernel/EditorImageDialogTest.php
@@ -37,8 +37,8 @@ protected function setUp() {
     parent::setUp();
     $this->installEntitySchema('file');
     $this->installSchema('system', ['key_value_expire']);
-    $this->installSchema('node', array('node_access'));
-    $this->installSchema('file', array('file_usage'));
+    $this->installSchema('node', ['node_access']);
+    $this->installSchema('file', ['file_usage']);
     $this->installConfig(['node']);
 
     // Add text formats.
diff --git a/core/modules/editor/tests/src/Kernel/EditorManagerTest.php b/core/modules/editor/tests/src/Kernel/EditorManagerTest.php
index b6077a587c9f03e256fc7c472fdf46a619512f4b..d1d6eafa186452753a61728bfe4f1f5ff576f368 100644
--- a/core/modules/editor/tests/src/Kernel/EditorManagerTest.php
+++ b/core/modules/editor/tests/src/Kernel/EditorManagerTest.php
@@ -18,7 +18,7 @@ class EditorManagerTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'filter', 'editor');
+  public static $modules = ['system', 'user', 'filter', 'editor'];
 
   /**
    * The manager for text editor plugins.
@@ -33,19 +33,19 @@ protected function setUp() {
     // Install the Filter module.
 
     // Add text formats.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $filtered_html_format->save();
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
       'weight' => 1,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $full_html_format->save();
   }
 
@@ -59,13 +59,13 @@ public function testManager() {
     // - listOptions() should return an empty list of options
     // - getAttachments() should return an empty #attachments array (and not
     //   a JS settings structure that is empty)
-    $this->assertIdentical(array(), $this->editorManager->listOptions(), 'When no text editor is enabled, the manager works correctly.');
-    $this->assertIdentical(array(), $this->editorManager->getAttachments(array()), 'No attachments when no text editor is enabled and retrieving attachments for zero text formats.');
-    $this->assertIdentical(array(), $this->editorManager->getAttachments(array('filtered_html', 'full_html')), 'No attachments when no text editor is enabled and retrieving attachments for multiple text formats.');
+    $this->assertIdentical([], $this->editorManager->listOptions(), 'When no text editor is enabled, the manager works correctly.');
+    $this->assertIdentical([], $this->editorManager->getAttachments([]), 'No attachments when no text editor is enabled and retrieving attachments for zero text formats.');
+    $this->assertIdentical([], $this->editorManager->getAttachments(['filtered_html', 'full_html']), 'No attachments when no text editor is enabled and retrieving attachments for multiple text formats.');
 
     // Enable the Text Editor Test module, which has the Unicorn Editor and
     // clear the editor manager's cache so it is picked up.
-    $this->enableModules(array('editor_test'));
+    $this->enableModules(['editor_test']);
     $this->editorManager = $this->container->get('plugin.manager.editor');
     $this->editorManager->clearCachedDefinitions();
 
@@ -80,11 +80,11 @@ public function testManager() {
       'editor' => 'unicorn',
     ]);
     $editor->save();
-    $this->assertIdentical(array(), $this->editorManager->getAttachments(array()), 'No attachments when one text editor is enabled and retrieving attachments for zero text formats.');
-    $expected = array(
-      'library' => array(
+    $this->assertIdentical([], $this->editorManager->getAttachments([]), 'No attachments when one text editor is enabled and retrieving attachments for zero text formats.');
+    $expected = [
+      'library' => [
         0 => 'editor_test/unicorn',
-      ),
+      ],
       'drupalSettings' => [
         'editor' => [
           'formats' => [
@@ -98,14 +98,14 @@ public function testManager() {
           ],
         ],
       ],
-    );
-    $this->assertIdentical($expected, $this->editorManager->getAttachments(array('filtered_html', 'full_html')), 'Correct attachments when one text editor is enabled and retrieving attachments for multiple text formats.');
+    ];
+    $this->assertIdentical($expected, $this->editorManager->getAttachments(['filtered_html', 'full_html']), 'Correct attachments when one text editor is enabled and retrieving attachments for multiple text formats.');
 
     // Case 4: a text editor available associated, but now with its JS settings
     // being altered via hook_editor_js_settings_alter().
     \Drupal::state()->set('editor_test_js_settings_alter_enabled', TRUE);
     $expected['drupalSettings']['editor']['formats']['full_html']['editorSettings']['ponyModeEnabled'] = FALSE;
-    $this->assertIdentical($expected, $this->editorManager->getAttachments(array('filtered_html', 'full_html')), 'hook_editor_js_settings_alter() works correctly.');
+    $this->assertIdentical($expected, $this->editorManager->getAttachments(['filtered_html', 'full_html']), 'hook_editor_js_settings_alter() works correctly.');
   }
 
 }
diff --git a/core/modules/editor/tests/src/Kernel/QuickEditIntegrationTest.php b/core/modules/editor/tests/src/Kernel/QuickEditIntegrationTest.php
index c04fe2df41c7e5cedb6aef235b8e740969a2ccb3..276f55922557a0648f3046319d5479e7611f2f75 100644
--- a/core/modules/editor/tests/src/Kernel/QuickEditIntegrationTest.php
+++ b/core/modules/editor/tests/src/Kernel/QuickEditIntegrationTest.php
@@ -26,7 +26,7 @@ class QuickEditIntegrationTest extends QuickEditTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('editor', 'editor_test');
+  public static $modules = ['editor', 'editor_test'];
 
   /**
    * The manager for editor plug-ins.
@@ -73,22 +73,22 @@ protected function setUp() {
     $this->createFieldWithStorage(
       $this->fieldName, 'text', 1, 'Long text field',
       // Instance settings.
-      array(),
+      [],
       // Widget type & settings.
       'text_textarea',
-      array('size' => 42),
+      ['size' => 42],
       // 'default' formatter type & settings.
       'text_default',
-      array()
+      []
     );
 
     // Create text format.
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
       'weight' => 1,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $full_html_format->save();
 
     // Associate text editor with text format.
@@ -99,12 +99,12 @@ protected function setUp() {
     $editor->save();
 
     // Also create a text format without an associated text editor.
-    FilterFormat::create(array(
+    FilterFormat::create([
       'format' => 'no_editor',
       'name' => 'No Text Editor',
       'weight' => 2,
-      'filters' => array(),
-    ))->save();
+      'filters' => [],
+    ])->save();
   }
 
   /**
@@ -179,15 +179,15 @@ public function testMetadata() {
     // Verify metadata.
     $items = $entity->get($this->fieldName);
     $metadata = $this->metadataGenerator->generateFieldMetadata($items, 'default');
-    $expected = array(
+    $expected = [
       'access' => TRUE,
       'label' => 'Long text field',
       'editor' => 'editor',
-      'custom' => array(
+      'custom' => [
         'format' => 'full_html',
         'formatHasTransformations' => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($expected, $metadata, 'The correct metadata (including custom metadata) is generated.');
   }
 
@@ -197,9 +197,9 @@ public function testMetadata() {
   public function testAttachments() {
     $this->editorSelector = $this->container->get('quickedit.editor.selector');
 
-    $editors = array('editor');
+    $editors = ['editor'];
     $attachments = $this->editorSelector->getEditorAttachments($editors);
-    $this->assertIdentical($attachments, array('library' => array('editor/quickedit.inPlaceEditor.formattedText')), "Expected attachments for Editor module's in-place editor found.");
+    $this->assertIdentical($attachments, ['library' => ['editor/quickedit.inPlaceEditor.formattedText']], "Expected attachments for Editor module's in-place editor found.");
   }
 
   /**
@@ -217,12 +217,12 @@ public function testGetUntransformedTextCommand() {
     $controller = new EditorController();
     $request = new Request();
     $response = $controller->getUntransformedText($entity, $this->fieldName, LanguageInterface::LANGCODE_DEFAULT, 'default');
-    $expected = array(
-      array(
+    $expected = [
+      [
         'command' => 'editorGetUntransformedText',
         'data' => 'Test',
-      )
-    );
+      ]
+    ];
 
     $ajax_response_attachments_processor = \Drupal::service('ajax_response.attachments_processor');
     $subscriber = new AjaxResponseSubscriber($ajax_response_attachments_processor);
diff --git a/core/modules/editor/tests/src/Unit/EditorConfigEntityUnitTest.php b/core/modules/editor/tests/src/Unit/EditorConfigEntityUnitTest.php
index e419f0aa1ab5cc8f0776ddf0ed91578eebdbb500..4e96f4ac65139b46ad61243e56f4184b897f7235 100644
--- a/core/modules/editor/tests/src/Unit/EditorConfigEntityUnitTest.php
+++ b/core/modules/editor/tests/src/Unit/EditorConfigEntityUnitTest.php
@@ -90,17 +90,17 @@ protected function setUp() {
    */
   public function testCalculateDependencies() {
     $format_id = 'filter.format.test';
-    $values = array('editor' => $this->editorId, 'format' => $format_id);
+    $values = ['editor' => $this->editorId, 'format' => $format_id];
 
     $plugin = $this->getMockBuilder('Drupal\editor\Plugin\EditorPluginInterface')
       ->disableOriginalConstructor()
       ->getMock();
     $plugin->expects($this->once())
       ->method('getPluginDefinition')
-      ->will($this->returnValue(array('provider' => 'test_module')));
+      ->will($this->returnValue(['provider' => 'test_module']));
     $plugin->expects($this->once())
       ->method('getDefaultSettings')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->editorPluginManager->expects($this->any())
       ->method('createInstance')
diff --git a/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php b/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
index d19758e5a06b5c522ecce0827a92a4c2c9e3c790..ce6309262c2f0f9acf8eb0519de717848d08d9b8 100644
--- a/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
+++ b/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
@@ -27,17 +27,17 @@ protected function setUp() {
       ->getMock();
     $this->format->expects($this->any())
       ->method('getFilterTypes')
-      ->will($this->returnValue(array(FilterInterface::TYPE_HTML_RESTRICTOR)));
-    $restrictions = array(
-      'allowed' => array(
+      ->will($this->returnValue([FilterInterface::TYPE_HTML_RESTRICTOR]));
+    $restrictions = [
+      'allowed' => [
         'p' => TRUE,
         'a' => TRUE,
-        '*' => array(
+        '*' => [
           'style' => FALSE,
           'on*' => FALSE,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     $this->format->expects($this->any())
       ->method('getHtmlRestrictions')
       ->will($this->returnValue($restrictions));
@@ -49,130 +49,130 @@ protected function setUp() {
    * @see \Drupal\Tests\editor\Unit\editor\EditorXssFilter\StandardTest::testFilterXss()
    */
   public function providerTestFilterXss() {
-    $data = array();
-    $data[] = array('<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>');
-    $data[] = array('<p style="color:red">Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>');
-    $data[] = array('<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><script>alert("evil");</script>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>alert("evil");');
-    $data[] = array('<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><a href="javascript:alert(1)">test</a>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><a href="alert(1)">test</a>');
+    $data = [];
+    $data[] = ['<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>'];
+    $data[] = ['<p style="color:red">Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>'];
+    $data[] = ['<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><script>alert("evil");</script>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>alert("evil");'];
+    $data[] = ['<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><a href="javascript:alert(1)">test</a>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><a href="alert(1)">test</a>'];
 
     // All cases listed on https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
 
     // No Filter Evasion.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_Filter_Evasion
-    $data[] = array('<SCRIPT SRC=http://ha.ckers.org/xss.js></SCRIPT>', '');
+    $data[] = ['<SCRIPT SRC=http://ha.ckers.org/xss.js></SCRIPT>', ''];
 
     // Image XSS using the JavaScript directive.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Image_XSS_using_the_JavaScript_directive
-    $data[] = array('<IMG SRC="javascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">');
+    $data[] = ['<IMG SRC="javascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">'];
 
     // No quotes and no semicolon.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_quotes_and_no_semicolon
-    $data[] = array('<IMG SRC=javascript:alert(\'XSS\')>', '<IMG>');
+    $data[] = ['<IMG SRC=javascript:alert(\'XSS\')>', '<IMG>'];
 
     // Case insensitive XSS attack vector.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Case_insensitive_XSS_attack_vector
-    $data[] = array('<IMG SRC=JaVaScRiPt:alert(\'XSS\')>', '<IMG>');
+    $data[] = ['<IMG SRC=JaVaScRiPt:alert(\'XSS\')>', '<IMG>'];
 
     // HTML entities.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#HTML_entities
-    $data[] = array('<IMG SRC=javascript:alert("XSS")>', '<IMG>');
+    $data[] = ['<IMG SRC=javascript:alert("XSS")>', '<IMG>'];
 
     // Grave accent obfuscation.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Grave_accent_obfuscation
-    $data[] = array('<IMG SRC=`javascript:alert("RSnake says, \'XSS\'")`>', '<IMG>');
+    $data[] = ['<IMG SRC=`javascript:alert("RSnake says, \'XSS\'")`>', '<IMG>'];
 
     // Malformed A tags.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Malformed_A_tags
-    $data[] = array('<a onmouseover="alert(document.cookie)">xxs link</a>', '<a>xxs link</a>');
-    $data[] = array('<a onmouseover=alert(document.cookie)>xxs link</a>', '<a>xxs link</a>');
+    $data[] = ['<a onmouseover="alert(document.cookie)">xxs link</a>', '<a>xxs link</a>'];
+    $data[] = ['<a onmouseover=alert(document.cookie)>xxs link</a>', '<a>xxs link</a>'];
 
     // Malformed IMG tags.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Malformed_IMG_tags
-    $data[] = array('<IMG """><SCRIPT>alert("XSS")</SCRIPT>">', '<IMG>alert("XSS")"&gt;');
+    $data[] = ['<IMG """><SCRIPT>alert("XSS")</SCRIPT>">', '<IMG>alert("XSS")"&gt;'];
 
     // fromCharCode.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#fromCharCode
-    $data[] = array('<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>', '<IMG src="alert(String.fromCharCode(88,83,83))">');
+    $data[] = ['<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>', '<IMG src="alert(String.fromCharCode(88,83,83))">'];
 
     // Default SRC tag to get past filters that check SRC domain.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_to_get_past_filters_that_check_SRC_domain
-    $data[] = array('<IMG SRC=# onmouseover="alert(\'xxs\')">', '<IMG src="#">');
+    $data[] = ['<IMG SRC=# onmouseover="alert(\'xxs\')">', '<IMG src="#">'];
 
     // Default SRC tag by leaving it empty.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_by_leaving_it_empty
-    $data[] = array('<IMG SRC= onmouseover="alert(\'xxs\')">', '<IMG nmouseover="alert(&#039;xxs&#039;)">');
+    $data[] = ['<IMG SRC= onmouseover="alert(\'xxs\')">', '<IMG nmouseover="alert(&#039;xxs&#039;)">'];
 
     // Default SRC tag by leaving it out entirely.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_by_leaving_it_out_entirely
-    $data[] = array('<IMG onmouseover="alert(\'xxs\')">', '<IMG>');
+    $data[] = ['<IMG onmouseover="alert(\'xxs\')">', '<IMG>'];
 
     // Decimal HTML character references.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Decimal_HTML_character_references
-    $data[] = array('<IMG SRC=&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#39;&#88;&#83;&#83;&#39;&#41;>', '<IMG src="alert(&#039;XSS&#039;)">');
+    $data[] = ['<IMG SRC=&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#39;&#88;&#83;&#83;&#39;&#41;>', '<IMG src="alert(&#039;XSS&#039;)">'];
 
     // Decimal HTML character references without trailing semicolons.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Decimal_HTML_character_references_without_trailing_semicolons
-    $data[] = array('<IMG SRC=&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041>', '<IMG src="&amp;#0000106&amp;#0000097&amp;#0000118&amp;#0000097&amp;#0000115&amp;#0000099&amp;#0000114&amp;#0000105&amp;#0000112&amp;#0000116&amp;#0000058&amp;#0000097&amp;#0000108&amp;#0000101&amp;#0000114&amp;#0000116&amp;#0000040&amp;#0000039&amp;#0000088&amp;#0000083&amp;#0000083&amp;#0000039&amp;#0000041">');
+    $data[] = ['<IMG SRC=&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041>', '<IMG src="&amp;#0000106&amp;#0000097&amp;#0000118&amp;#0000097&amp;#0000115&amp;#0000099&amp;#0000114&amp;#0000105&amp;#0000112&amp;#0000116&amp;#0000058&amp;#0000097&amp;#0000108&amp;#0000101&amp;#0000114&amp;#0000116&amp;#0000040&amp;#0000039&amp;#0000088&amp;#0000083&amp;#0000083&amp;#0000039&amp;#0000041">'];
 
     // Hexadecimal HTML character references without trailing semicolons.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Hexadecimal_HTML_character_references_without_trailing_semicolons
-    $data[] = array('<IMG SRC=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29>', '<IMG src="&amp;#x6A&amp;#x61&amp;#x76&amp;#x61&amp;#x73&amp;#x63&amp;#x72&amp;#x69&amp;#x70&amp;#x74&amp;#x3A&amp;#x61&amp;#x6C&amp;#x65&amp;#x72&amp;#x74&amp;#x28&amp;#x27&amp;#x58&amp;#x53&amp;#x53&amp;#x27&amp;#x29">');
+    $data[] = ['<IMG SRC=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29>', '<IMG src="&amp;#x6A&amp;#x61&amp;#x76&amp;#x61&amp;#x73&amp;#x63&amp;#x72&amp;#x69&amp;#x70&amp;#x74&amp;#x3A&amp;#x61&amp;#x6C&amp;#x65&amp;#x72&amp;#x74&amp;#x28&amp;#x27&amp;#x58&amp;#x53&amp;#x53&amp;#x27&amp;#x29">'];
 
     // Embedded tab.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_tab
-    $data[] = array('<IMG SRC="jav  ascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">');
+    $data[] = ['<IMG SRC="jav  ascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">'];
 
     // Embedded Encoded tab.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_Encoded_tab
-    $data[] = array('<IMG SRC="jav&#x09;ascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">');
+    $data[] = ['<IMG SRC="jav&#x09;ascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">'];
 
     // Embedded newline to break up XSS.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_newline_to_break_up_XSS
-    $data[] = array('<IMG SRC="jav&#x0A;ascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">');
+    $data[] = ['<IMG SRC="jav&#x0A;ascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">'];
 
     // Embedded carriage return to break up XSS.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_carriage_return_to_break_up_XSS
-    $data[] = array('<IMG SRC="jav&#x0D;ascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">');
+    $data[] = ['<IMG SRC="jav&#x0D;ascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">'];
 
     // Null breaks up JavaScript directive.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Null_breaks_up_JavaScript_directive
-    $data[] = array("<IMG SRC=java\0script:alert(\"XSS\")>", '<IMG>');
+    $data[] = ["<IMG SRC=java\0script:alert(\"XSS\")>", '<IMG>'];
 
     // Spaces and meta chars before the JavaScript in images for XSS.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Spaces_and_meta_chars_before_the_JavaScript_in_images_for_XSS
     // @fixme This dataset currently fails under 5.4 because of
     //   https://www.drupal.org/node/1210798. Restore after it's fixed.
     if (version_compare(PHP_VERSION, '5.4.0', '<')) {
-      $data[] = array('<IMG SRC=" &#14;  javascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">');
+      $data[] = ['<IMG SRC=" &#14;  javascript:alert(\'XSS\');">', '<IMG src="alert(&#039;XSS&#039;);">'];
     }
 
     // Non-alpha-non-digit XSS.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Non-alpha-non-digit_XSS
-    $data[] = array('<SCRIPT/XSS SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '');
-    $data[] = array('<BODY onload!#$%&()*~+-_.,:;?@[/|\]^`=alert("XSS")>', '<BODY>');
-    $data[] = array('<SCRIPT/SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '');
+    $data[] = ['<SCRIPT/XSS SRC="http://ha.ckers.org/xss.js"></SCRIPT>', ''];
+    $data[] = ['<BODY onload!#$%&()*~+-_.,:;?@[/|\]^`=alert("XSS")>', '<BODY>'];
+    $data[] = ['<SCRIPT/SRC="http://ha.ckers.org/xss.js"></SCRIPT>', ''];
 
     // Extraneous open brackets.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Extraneous_open_brackets
-    $data[] = array('<<SCRIPT>alert("XSS");//<</SCRIPT>', '&lt;alert("XSS");//&lt;');
+    $data[] = ['<<SCRIPT>alert("XSS");//<</SCRIPT>', '&lt;alert("XSS");//&lt;'];
 
     // No closing script tags.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_closing_script_tags
-    $data[] = array('<SCRIPT SRC=http://ha.ckers.org/xss.js?< B >', '');
+    $data[] = ['<SCRIPT SRC=http://ha.ckers.org/xss.js?< B >', ''];
 
     // Protocol resolution in script tags.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Protocol_resolution_in_script_tags
-    $data[] = array('<SCRIPT SRC=//ha.ckers.org/.j>', '');
+    $data[] = ['<SCRIPT SRC=//ha.ckers.org/.j>', ''];
 
     // Half open HTML/JavaScript XSS vector.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Half_open_HTML.2FJavaScript_XSS_vector
-    $data[] = array('<IMG SRC="javascript:alert(\'XSS\')"', '<IMG src="alert(&#039;XSS&#039;)">');
+    $data[] = ['<IMG SRC="javascript:alert(\'XSS\')"', '<IMG src="alert(&#039;XSS&#039;)">'];
 
     // Double open angle brackets.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Double_open_angle_brackets
     // @see http://ha.ckers.org/blog/20060611/hotbot-xss-vulnerability/ to
     //      understand why this is a vulnerability.
-    $data[] = array('<iframe src=http://ha.ckers.org/scriptlet.html <', '<iframe src="http://ha.ckers.org/scriptlet.html">');
+    $data[] = ['<iframe src=http://ha.ckers.org/scriptlet.html <', '<iframe src="http://ha.ckers.org/scriptlet.html">'];
 
     // Escaping JavaScript escapes.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Escaping_JavaScript_escapes
@@ -181,43 +181,43 @@ public function providerTestFilterXss() {
 
     // End title tag.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#End_title_tag
-    $data[] = array('</TITLE><SCRIPT>alert("XSS");</SCRIPT>', '</TITLE>alert("XSS");');
+    $data[] = ['</TITLE><SCRIPT>alert("XSS");</SCRIPT>', '</TITLE>alert("XSS");'];
 
     // INPUT image.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#INPUT_image
-    $data[] = array('<INPUT TYPE="IMAGE" SRC="javascript:alert(\'XSS\');">', '<INPUT type="IMAGE" src="alert(&#039;XSS&#039;);">');
+    $data[] = ['<INPUT TYPE="IMAGE" SRC="javascript:alert(\'XSS\');">', '<INPUT type="IMAGE" src="alert(&#039;XSS&#039;);">'];
 
     // BODY image.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BODY_image
-    $data[] = array('<BODY BACKGROUND="javascript:alert(\'XSS\')">', '<BODY background="alert(&#039;XSS&#039;)">');
+    $data[] = ['<BODY BACKGROUND="javascript:alert(\'XSS\')">', '<BODY background="alert(&#039;XSS&#039;)">'];
 
     // IMG Dynsrc.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_Dynsrc
-    $data[] = array('<IMG DYNSRC="javascript:alert(\'XSS\')">', '<IMG dynsrc="alert(&#039;XSS&#039;)">');
+    $data[] = ['<IMG DYNSRC="javascript:alert(\'XSS\')">', '<IMG dynsrc="alert(&#039;XSS&#039;)">'];
 
     // IMG lowsrc.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_lowsrc
-    $data[] = array('<IMG LOWSRC="javascript:alert(\'XSS\')">', '<IMG lowsrc="alert(&#039;XSS&#039;)">');
+    $data[] = ['<IMG LOWSRC="javascript:alert(\'XSS\')">', '<IMG lowsrc="alert(&#039;XSS&#039;)">'];
 
     // List-style-image.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#List-style-image
-    $data[] = array('<STYLE>li {list-style-image: url("javascript:alert(\'XSS\')");}</STYLE><UL><LI>XSS</br>', 'li {list-style-image: url("javascript:alert(\'XSS\')");}<UL><LI>XSS</br>');
+    $data[] = ['<STYLE>li {list-style-image: url("javascript:alert(\'XSS\')");}</STYLE><UL><LI>XSS</br>', 'li {list-style-image: url("javascript:alert(\'XSS\')");}<UL><LI>XSS</br>'];
 
     // VBscript in an image.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#VBscript_in_an_image
-    $data[] = array('<IMG SRC=\'vbscript:msgbox("XSS")\'>', '<IMG src=\'msgbox(&quot;XSS&quot;)\'>');
+    $data[] = ['<IMG SRC=\'vbscript:msgbox("XSS")\'>', '<IMG src=\'msgbox(&quot;XSS&quot;)\'>'];
 
     // Livescript (older versions of Netscape only).
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Livescript_.28older_versions_of_Netscape_only.29
-    $data[] = array('<IMG SRC="livescript:[code]">', '<IMG src="[code]">');
+    $data[] = ['<IMG SRC="livescript:[code]">', '<IMG src="[code]">'];
 
     // BODY tag.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BODY_tag
-    $data[] = array('<BODY ONLOAD=alert(\'XSS\')>', '<BODY>');
+    $data[] = ['<BODY ONLOAD=alert(\'XSS\')>', '<BODY>'];
 
     // Event handlers.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Event_Handlers
-    $events = array(
+    $events = [
       'onAbort',
       'onActivate',
       'onAfterPrint',
@@ -321,71 +321,71 @@ public function providerTestFilterXss() {
       'onUndo',
       'onUnload',
       'onURLFlip',
-    );
+    ];
     foreach ($events as $event) {
-      $data[] = array('<p ' . $event . '="javascript:alert(\'XSS\');">Dangerous llama!</p>', '<p>Dangerous llama!</p>');
+      $data[] = ['<p ' . $event . '="javascript:alert(\'XSS\');">Dangerous llama!</p>', '<p>Dangerous llama!</p>'];
     }
 
     // BGSOUND.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BGSOUND
-    $data[] = array('<BGSOUND SRC="javascript:alert(\'XSS\');">', '<BGSOUND src="alert(&#039;XSS&#039;);">');
+    $data[] = ['<BGSOUND SRC="javascript:alert(\'XSS\');">', '<BGSOUND src="alert(&#039;XSS&#039;);">'];
 
     // & JavaScript includes.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#.26_JavaScript_includes
-    $data[] = array('<BR SIZE="&{alert(\'XSS\')}">', '<BR size="">');
+    $data[] = ['<BR SIZE="&{alert(\'XSS\')}">', '<BR size="">'];
 
     // STYLE sheet.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_sheet
-    $data[] = array('<LINK REL="stylesheet" HREF="javascript:alert(\'XSS\');">', '');
+    $data[] = ['<LINK REL="stylesheet" HREF="javascript:alert(\'XSS\');">', ''];
 
     // Remote style sheet.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet
-    $data[] = array('<LINK REL="stylesheet" HREF="http://ha.ckers.org/xss.css">', '');
+    $data[] = ['<LINK REL="stylesheet" HREF="http://ha.ckers.org/xss.css">', ''];
 
     // Remote style sheet part 2.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_2
-    $data[] = array('<STYLE>@import\'http://ha.ckers.org/xss.css\';</STYLE>', '@import\'http://ha.ckers.org/xss.css\';');
+    $data[] = ['<STYLE>@import\'http://ha.ckers.org/xss.css\';</STYLE>', '@import\'http://ha.ckers.org/xss.css\';'];
 
     // Remote style sheet part 3.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_3
-    $data[] = array('<META HTTP-EQUIV="Link" Content="<http://ha.ckers.org/xss.css>; REL=stylesheet">', '<META http-equiv="Link">; REL=stylesheet"&gt;');
+    $data[] = ['<META HTTP-EQUIV="Link" Content="<http://ha.ckers.org/xss.css>; REL=stylesheet">', '<META http-equiv="Link">; REL=stylesheet"&gt;'];
 
     // Remote style sheet part 4.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_4
-    $data[] = array('<STYLE>BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}</STYLE>', 'BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}');
+    $data[] = ['<STYLE>BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}</STYLE>', 'BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}'];
 
     // STYLE tags with broken up JavaScript for XSS.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tags_with_broken_up_JavaScript_for_XSS
-    $data[] = array('<STYLE>@im\port\'\ja\vasc\ript:alert("XSS")\';</STYLE>', '@im\port\'\ja\vasc\ript:alert("XSS")\';');
+    $data[] = ['<STYLE>@im\port\'\ja\vasc\ript:alert("XSS")\';</STYLE>', '@im\port\'\ja\vasc\ript:alert("XSS")\';'];
 
     // STYLE attribute using a comment to break up expression.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_attribute_using_a_comment_to_break_up_expression
-    $data[] = array('<IMG STYLE="xss:expr/*XSS*/ession(alert(\'XSS\'))">', '<IMG>');
+    $data[] = ['<IMG STYLE="xss:expr/*XSS*/ession(alert(\'XSS\'))">', '<IMG>'];
 
     // IMG STYLE with expression.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_STYLE_with_expression
-    $data[] = array('exp/*<A STYLE=\'no\xss:noxss("*//*");
-xss:ex/*XSS*//*/*/pression(alert("XSS"))\'>', 'exp/*<A>');
+    $data[] = ['exp/*<A STYLE=\'no\xss:noxss("*//*");
+xss:ex/*XSS*//*/*/pression(alert("XSS"))\'>', 'exp/*<A>'];
 
     // STYLE tag (Older versions of Netscape only).
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_.28Older_versions_of_Netscape_only.29
-    $data[] = array('<STYLE TYPE="text/javascript">alert(\'XSS\');</STYLE>', 'alert(\'XSS\');');
+    $data[] = ['<STYLE TYPE="text/javascript">alert(\'XSS\');</STYLE>', 'alert(\'XSS\');'];
 
     // STYLE tag using background-image.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_using_background-image
-    $data[] = array('<STYLE>.XSS{background-image:url("javascript:alert(\'XSS\')");}</STYLE><A CLASS=XSS></A>', '.XSS{background-image:url("javascript:alert(\'XSS\')");}<A class="XSS"></A>');
+    $data[] = ['<STYLE>.XSS{background-image:url("javascript:alert(\'XSS\')");}</STYLE><A CLASS=XSS></A>', '.XSS{background-image:url("javascript:alert(\'XSS\')");}<A class="XSS"></A>'];
 
     // STYLE tag using background.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_using_background
-    $data[] = array('<STYLE type="text/css">BODY{background:url("javascript:alert(\'XSS\')")}</STYLE>', 'BODY{background:url("javascript:alert(\'XSS\')")}');
+    $data[] = ['<STYLE type="text/css">BODY{background:url("javascript:alert(\'XSS\')")}</STYLE>', 'BODY{background:url("javascript:alert(\'XSS\')")}'];
 
     // Anonymous HTML with STYLE attribute.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Anonymous_HTML_with_STYLE_attribute
-    $data[] = array('<XSS STYLE="xss:expression(alert(\'XSS\'))">', '<XSS>');
+    $data[] = ['<XSS STYLE="xss:expression(alert(\'XSS\'))">', '<XSS>'];
 
     // Local htc file.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Local_htc_file
-    $data[] = array('<XSS STYLE="behavior: url(xss.htc);">', '<XSS>');
+    $data[] = ['<XSS STYLE="behavior: url(xss.htc);">', '<XSS>'];
 
     // US-ASCII encoding.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#US-ASCII_encoding
@@ -393,77 +393,77 @@ public function providerTestFilterXss() {
 
     // META.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META
-    $data[] = array('<META HTTP-EQUIV="refresh" CONTENT="0;url=javascript:alert(\'XSS\');">', '<META http-equiv="refresh" content="alert(&#039;XSS&#039;);">');
+    $data[] = ['<META HTTP-EQUIV="refresh" CONTENT="0;url=javascript:alert(\'XSS\');">', '<META http-equiv="refresh" content="alert(&#039;XSS&#039;);">'];
 
     // META using data.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META_using_data
-    $data[] = array('<META HTTP-EQUIV="refresh" CONTENT="0;url=data:text/html base64,PHNjcmlwdD5hbGVydCgnWFNTJyk8L3NjcmlwdD4K">', '<META http-equiv="refresh" content="text/html base64,PHNjcmlwdD5hbGVydCgnWFNTJyk8L3NjcmlwdD4K">');
+    $data[] = ['<META HTTP-EQUIV="refresh" CONTENT="0;url=data:text/html base64,PHNjcmlwdD5hbGVydCgnWFNTJyk8L3NjcmlwdD4K">', '<META http-equiv="refresh" content="text/html base64,PHNjcmlwdD5hbGVydCgnWFNTJyk8L3NjcmlwdD4K">'];
 
     // META with additional URL parameter
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META
-    $data[] = array('<META HTTP-EQUIV="refresh" CONTENT="0; URL=http://;URL=javascript:alert(\'XSS\');">', '<META http-equiv="refresh" content="//;URL=javascript:alert(&#039;XSS&#039;);">');
+    $data[] = ['<META HTTP-EQUIV="refresh" CONTENT="0; URL=http://;URL=javascript:alert(\'XSS\');">', '<META http-equiv="refresh" content="//;URL=javascript:alert(&#039;XSS&#039;);">'];
 
     // IFRAME.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IFRAME
-    $data[] = array('<IFRAME SRC="javascript:alert(\'XSS\');"></IFRAME>', '<IFRAME src="alert(&#039;XSS&#039;);"></IFRAME>');
+    $data[] = ['<IFRAME SRC="javascript:alert(\'XSS\');"></IFRAME>', '<IFRAME src="alert(&#039;XSS&#039;);"></IFRAME>'];
 
     // IFRAME Event based.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IFRAME_Event_based
-    $data[] = array('<IFRAME SRC=# onmouseover="alert(document.cookie)"></IFRAME>', '<IFRAME src="#"></IFRAME>');
+    $data[] = ['<IFRAME SRC=# onmouseover="alert(document.cookie)"></IFRAME>', '<IFRAME src="#"></IFRAME>'];
 
     // FRAME.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#FRAME
-    $data[] = array('<FRAMESET><FRAME SRC="javascript:alert(\'XSS\');"></FRAMESET>', '<FRAMESET><FRAME src="alert(&#039;XSS&#039;);"></FRAMESET>');
+    $data[] = ['<FRAMESET><FRAME SRC="javascript:alert(\'XSS\');"></FRAMESET>', '<FRAMESET><FRAME src="alert(&#039;XSS&#039;);"></FRAMESET>'];
 
     // TABLE.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#TABLE
-    $data[] = array('<TABLE BACKGROUND="javascript:alert(\'XSS\')">', '<TABLE background="alert(&#039;XSS&#039;)">');
+    $data[] = ['<TABLE BACKGROUND="javascript:alert(\'XSS\')">', '<TABLE background="alert(&#039;XSS&#039;)">'];
 
     // TD.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#TD
-    $data[] = array('<TABLE><TD BACKGROUND="javascript:alert(\'XSS\')">', '<TABLE><TD background="alert(&#039;XSS&#039;)">');
+    $data[] = ['<TABLE><TD BACKGROUND="javascript:alert(\'XSS\')">', '<TABLE><TD background="alert(&#039;XSS&#039;)">'];
 
     // DIV background-image.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image
-    $data[] = array('<DIV STYLE="background-image: url(javascript:alert(\'XSS\'))">', '<DIV>');
+    $data[] = ['<DIV STYLE="background-image: url(javascript:alert(\'XSS\'))">', '<DIV>'];
 
     // DIV background-image with unicoded XSS exploit.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image_with_unicoded_XSS_exploit
-    $data[] = array('<DIV STYLE="background-image:\0075\0072\006C\0028\'\006a\0061\0076\0061\0073\0063\0072\0069\0070\0074\003a\0061\006c\0065\0072\0074\0028.1027\0058.1053\0053\0027\0029\'\0029">', '<DIV>');
+    $data[] = ['<DIV STYLE="background-image:\0075\0072\006C\0028\'\006a\0061\0076\0061\0073\0063\0072\0069\0070\0074\003a\0061\006c\0065\0072\0074\0028.1027\0058.1053\0053\0027\0029\'\0029">', '<DIV>'];
 
     // DIV background-image plus extra characters.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image_plus_extra_characters
-    $data[] = array('<DIV STYLE="background-image: url(&#1;javascript:alert(\'XSS\'))">', '<DIV>');
+    $data[] = ['<DIV STYLE="background-image: url(&#1;javascript:alert(\'XSS\'))">', '<DIV>'];
 
     // DIV expression.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_expression
-    $data[] = array('<DIV STYLE="width: expression(alert(\'XSS\'));">', '<DIV>');
+    $data[] = ['<DIV STYLE="width: expression(alert(\'XSS\'));">', '<DIV>'];
 
     // Downlevel-Hidden block.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Downlevel-Hidden_block
-    $data[] = array('<!--[if gte IE 4]>
+    $data[] = ['<!--[if gte IE 4]>
  <SCRIPT>alert(\'XSS\');</SCRIPT>
- <![endif]-->', "\n alert('XSS');\n ");
+ <![endif]-->', "\n alert('XSS');\n "];
 
     // BASE tag.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BASE_tag
-    $data[] = array('<BASE HREF="javascript:alert(\'XSS\');//">', '<BASE href="alert(&#039;XSS&#039;);//">');
+    $data[] = ['<BASE HREF="javascript:alert(\'XSS\');//">', '<BASE href="alert(&#039;XSS&#039;);//">'];
 
     // OBJECT tag.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#OBJECT_tag
-    $data[] = array('<OBJECT TYPE="text/x-scriptlet" DATA="http://ha.ckers.org/scriptlet.html"></OBJECT>', '');
+    $data[] = ['<OBJECT TYPE="text/x-scriptlet" DATA="http://ha.ckers.org/scriptlet.html"></OBJECT>', ''];
 
     // Using an EMBED tag you can embed a Flash movie that contains XSS.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Using_an_EMBED_tag_you_can_embed_a_Flash_movie_that_contains_XSS
-    $data[] = array('<EMBED SRC="http://ha.ckers.org/xss.swf" AllowScriptAccess="always"></EMBED>', '');
+    $data[] = ['<EMBED SRC="http://ha.ckers.org/xss.swf" AllowScriptAccess="always"></EMBED>', ''];
 
     // You can EMBED SVG which can contain your XSS vector.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#You_can_EMBED_SVG_which_can_contain_your_XSS_vector
-    $data[] = array('<EMBED SRC="data:image/svg+xml;base64,PHN2ZyB4bWxuczpzdmc9Imh0dH A6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcv MjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hs aW5rIiB2ZXJzaW9uPSIxLjAiIHg9IjAiIHk9IjAiIHdpZHRoPSIxOTQiIGhlaWdodD0iMjAw IiBpZD0ieHNzIj48c2NyaXB0IHR5cGU9InRleHQvZWNtYXNjcmlwdCI+YWxlcnQoIlh TUyIpOzwvc2NyaXB0Pjwvc3ZnPg==" type="image/svg+xml" AllowScriptAccess="always"></EMBED>', '');
+    $data[] = ['<EMBED SRC="data:image/svg+xml;base64,PHN2ZyB4bWxuczpzdmc9Imh0dH A6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcv MjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hs aW5rIiB2ZXJzaW9uPSIxLjAiIHg9IjAiIHk9IjAiIHdpZHRoPSIxOTQiIGhlaWdodD0iMjAw IiBpZD0ieHNzIj48c2NyaXB0IHR5cGU9InRleHQvZWNtYXNjcmlwdCI+YWxlcnQoIlh TUyIpOzwvc2NyaXB0Pjwvc3ZnPg==" type="image/svg+xml" AllowScriptAccess="always"></EMBED>', ''];
 
     // XML data island with CDATA obfuscation.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#XML_data_island_with_CDATA_obfuscation
-    $data[] = array('<XML ID="xss"><I><B><IMG SRC="javas<!-- -->cript:alert(\'XSS\')"></B></I></XML><SPAN DATASRC="#xss" DATAFLD="B" DATAFORMATAS="HTML"></SPAN>', '<XML id="xss"><I><B><IMG>cript:alert(\'XSS\')"&gt;</B></I></XML><SPAN datasrc="#xss" datafld="B" dataformatas="HTML"></SPAN>');
+    $data[] = ['<XML ID="xss"><I><B><IMG SRC="javas<!-- -->cript:alert(\'XSS\')"></B></I></XML><SPAN DATASRC="#xss" DATAFLD="B" DATAFORMATAS="HTML"></SPAN>', '<XML id="xss"><I><B><IMG>cript:alert(\'XSS\')"&gt;</B></I></XML><SPAN datasrc="#xss" datafld="B" dataformatas="HTML"></SPAN>'];
 
     // Locally hosted XML with embedded JavaScript that is generated using an XML data island.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Locally_hosted_XML_with_embedded_JavaScript_that_is_generated_using_an_XML_data_island
@@ -472,11 +472,11 @@ public function providerTestFilterXss() {
 
     // HTML+TIME in XML.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#HTML.2BTIME_in_XML
-    $data[] = array('<?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time"><?import namespace="t" implementation="#default#time2"><t:set attributeName="innerHTML" to="XSS<SCRIPT DEFER>alert("XSS")</SCRIPT>">', '&lt;?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time"&gt;&lt;?import namespace="t" implementation="#default#time2"&gt;<t set attributename="innerHTML">alert("XSS")"&gt;');
+    $data[] = ['<?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time"><?import namespace="t" implementation="#default#time2"><t:set attributeName="innerHTML" to="XSS<SCRIPT DEFER>alert("XSS")</SCRIPT>">', '&lt;?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time"&gt;&lt;?import namespace="t" implementation="#default#time2"&gt;<t set attributename="innerHTML">alert("XSS")"&gt;'];
 
     // Assuming you can only fit in a few characters and it filters against ".js".
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Assuming_you_can_only_fit_in_a_few_characters_and_it_filters_against_.22.js.22
-    $data[] = array('<SCRIPT SRC="http://ha.ckers.org/xss.jpg"></SCRIPT>', '');
+    $data[] = ['<SCRIPT SRC="http://ha.ckers.org/xss.jpg"></SCRIPT>', ''];
 
     // IMG Embedded commands.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_Embedded_commands
@@ -485,7 +485,7 @@ public function providerTestFilterXss() {
 
     // Cookie manipulation.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Cookie_manipulation
-    $data[] = array('<META HTTP-EQUIV="Set-Cookie" Content="USERID=<SCRIPT>alert(\'XSS\')</SCRIPT>">', '<META http-equiv="Set-Cookie">alert(\'XSS\')"&gt;');
+    $data[] = ['<META HTTP-EQUIV="Set-Cookie" Content="USERID=<SCRIPT>alert(\'XSS\')</SCRIPT>">', '<META http-equiv="Set-Cookie">alert(\'XSS\')"&gt;'];
 
     // UTF-7 encoding.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#UTF-7_encoding
@@ -493,13 +493,13 @@ public function providerTestFilterXss() {
 
     // XSS using HTML quote encapsulation.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#XSS_using_HTML_quote_encapsulation
-    $data[] = array('<SCRIPT a=">" SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '" SRC="http://ha.ckers.org/xss.js"&gt;');
-    $data[] = array('<SCRIPT =">" SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '" SRC="http://ha.ckers.org/xss.js"&gt;');
-    $data[] = array('<SCRIPT a=">" \'\' SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '" \'\' SRC="http://ha.ckers.org/xss.js"&gt;');
-    $data[] = array('<SCRIPT "a=\'>\'" SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '\'" SRC="http://ha.ckers.org/xss.js"&gt;');
-    $data[] = array('<SCRIPT a=`>` SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '` SRC="http://ha.ckers.org/xss.js"&gt;');
-    $data[] = array('<SCRIPT a=">\'>" SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '\'&gt;" SRC="http://ha.ckers.org/xss.js"&gt;');
-    $data[] = array('<SCRIPT>document.write("<SCRI");</SCRIPT>PT SRC="http://ha.ckers.org/xss.js"></SCRIPT>', 'document.write("<SCRI>PT SRC="http://ha.ckers.org/xss.js"&gt;');
+    $data[] = ['<SCRIPT a=">" SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '" SRC="http://ha.ckers.org/xss.js"&gt;'];
+    $data[] = ['<SCRIPT =">" SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '" SRC="http://ha.ckers.org/xss.js"&gt;'];
+    $data[] = ['<SCRIPT a=">" \'\' SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '" \'\' SRC="http://ha.ckers.org/xss.js"&gt;'];
+    $data[] = ['<SCRIPT "a=\'>\'" SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '\'" SRC="http://ha.ckers.org/xss.js"&gt;'];
+    $data[] = ['<SCRIPT a=`>` SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '` SRC="http://ha.ckers.org/xss.js"&gt;'];
+    $data[] = ['<SCRIPT a=">\'>" SRC="http://ha.ckers.org/xss.js"></SCRIPT>', '\'&gt;" SRC="http://ha.ckers.org/xss.js"&gt;'];
+    $data[] = ['<SCRIPT>document.write("<SCRI");</SCRIPT>PT SRC="http://ha.ckers.org/xss.js"></SCRIPT>', 'document.write("<SCRI>PT SRC="http://ha.ckers.org/xss.js"&gt;'];
 
     // URL string evasion.
     // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#URL_string_evasion
@@ -511,12 +511,12 @@ public function providerTestFilterXss() {
     // @see \Drupal\editor\EditorXssFilter::filterXssDataAttributes()
 
     // The following two test cases verify that XSS attack vectors are filtered.
-    $data[] = array('<img src="butterfly.jpg" data-caption="&lt;script&gt;alert();&lt;/script&gt;" />', '<img src="butterfly.jpg" data-caption="alert();" />');
-    $data[] = array('<img src="butterfly.jpg" data-caption="&lt;EMBED SRC=&quot;http://ha.ckers.org/xss.swf&quot; AllowScriptAccess=&quot;always&quot;&gt;&lt;/EMBED&gt;" />', '<img src="butterfly.jpg" data-caption="" />');
+    $data[] = ['<img src="butterfly.jpg" data-caption="&lt;script&gt;alert();&lt;/script&gt;" />', '<img src="butterfly.jpg" data-caption="alert();" />'];
+    $data[] = ['<img src="butterfly.jpg" data-caption="&lt;EMBED SRC=&quot;http://ha.ckers.org/xss.swf&quot; AllowScriptAccess=&quot;always&quot;&gt;&lt;/EMBED&gt;" />', '<img src="butterfly.jpg" data-caption="" />'];
 
     // When including HTML-tags as visible content, they are double-escaped.
     // This test case ensures that we leave that content unchanged.
-    $data[] = array('<img src="butterfly.jpg" data-caption="&amp;lt;script&amp;gt;alert();&amp;lt;/script&amp;gt;" />', '<img src="butterfly.jpg" data-caption="&amp;lt;script&amp;gt;alert();&amp;lt;/script&amp;gt;" />');
+    $data[] = ['<img src="butterfly.jpg" data-caption="&amp;lt;script&amp;gt;alert();&amp;lt;/script&amp;gt;" />', '<img src="butterfly.jpg" data-caption="&amp;lt;script&amp;gt;alert();&amp;lt;/script&amp;gt;" />'];
 
     return $data;
   }
@@ -573,27 +573,27 @@ public function testBlacklistMode($value, $expected, $message, array $disallowed
    *     - (optional) The disallowed HTML tags to be passed to \Drupal\Component\Utility\Xss::filter().
    */
   public function providerTestBlackListMode() {
-    return array(
-      array(
+    return [
+      [
         '<unknown style="visibility:hidden">Pink Fairy Armadillo</unknown><video src="gerenuk.mp4"><script>alert(0)</script>',
         '<unknown>Pink Fairy Armadillo</unknown><video src="gerenuk.mp4">alert(0)',
         'Disallow only the script tag',
-        array('script')
-      ),
-      array(
+        ['script']
+      ],
+      [
         '<unknown style="visibility:hidden">Pink Fairy Armadillo</unknown><video src="gerenuk.mp4"><script>alert(0)</script>',
         '<unknown>Pink Fairy Armadillo</unknown>alert(0)',
         'Disallow both the script and video tags',
-        array('script', 'video')
-      ),
+        ['script', 'video']
+      ],
       // No real use case for this, but it is an edge case we must ensure works.
-      array(
+      [
         '<unknown style="visibility:hidden">Pink Fairy Armadillo</unknown><video src="gerenuk.mp4"><script>alert(0)</script>',
         '<unknown>Pink Fairy Armadillo</unknown><video src="gerenuk.mp4"><script>alert(0)</script>',
         'Disallow no tags',
-        array()
-      ),
-    );
+        []
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/field/field.api.php b/core/modules/field/field.api.php
index 8e11650f5cb207a5068ed37b279394d4febad0d6..b0899ea02b076bd7a1d183d50d172e2009457365 100644
--- a/core/modules/field/field.api.php
+++ b/core/modules/field/field.api.php
@@ -85,7 +85,7 @@ function hook_field_storage_config_update_forbid(\Drupal\field\FieldStorageConfi
     $prior_allowed_values = $prior_field_storage->getSetting('allowed_values');
     $lost_keys = array_keys(array_diff_key($prior_allowed_values, $allowed_values));
     if (_options_values_in_use($field_storage->getTargetEntityTypeId(), $field_storage->getName(), $lost_keys)) {
-      throw new \Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException(t('A list field (@field_name) with existing data cannot have its keys changed.', array('@field_name' => $field_storage->getName())));
+      throw new \Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException(t('A list field (@field_name) with existing data cannot have its keys changed.', ['@field_name' => $field_storage->getName()]));
     }
   }
 }
@@ -257,7 +257,7 @@ function hook_field_formatter_info_alter(array &$info) {
  * @ingroup field_info
  */
 function hook_field_info_max_weight($entity_type, $bundle, $context, $context_mode) {
-  $weights = array();
+  $weights = [];
 
   foreach (my_module_entity_additions($entity_type, $bundle, $context, $context_mode) as $addition) {
     $weights[] = $addition['weight'];
diff --git a/core/modules/field/field.module b/core/modules/field/field.module
index 81330071762d160aa0b0839b330403d1ec6bbb5f..8f3877d0f3898cb1870bc68b6d4e9e01339619b5 100644
--- a/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -67,10 +67,10 @@
 function field_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.field':
-      $field_ui_url = \Drupal::moduleHandler()->moduleExists('field_ui') ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#';
+      $field_ui_url = \Drupal::moduleHandler()->moduleExists('field_ui') ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#';
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Field module allows custom data fields to be defined for <em>entity</em> types (see below). The Field module takes care of storing, loading, editing, and rendering field data. Most users will not interact with the Field module directly, but will instead use the <a href=":field-ui-help">Field UI module</a> user interface. Module developers can use the Field API to make new entity types "fieldable" and thus allow fields to be attached to them. For more information, see the <a href=":field">online documentation for the Field module</a>.', array(':field-ui-help' => $field_ui_url, ':field' => 'https://www.drupal.org/documentation/modules/field')) . '</p>';
+      $output .= '<p>' . t('The Field module allows custom data fields to be defined for <em>entity</em> types (see below). The Field module takes care of storing, loading, editing, and rendering field data. Most users will not interact with the Field module directly, but will instead use the <a href=":field-ui-help">Field UI module</a> user interface. Module developers can use the Field API to make new entity types "fieldable" and thus allow fields to be attached to them. For more information, see the <a href=":field">online documentation for the Field module</a>.', [':field-ui-help' => $field_ui_url, ':field' => 'https://www.drupal.org/documentation/modules/field']) . '</p>';
       $output .= '<h3>' . t('Terminology') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Entities and entity types') . '</dt>';
@@ -87,19 +87,19 @@ function field_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Enabling field types, widgets, and formatters') . '</dt>';
-      $output .= '<dd>' . t('The Field module provides the infrastructure for fields; the field types, formatters, and widgets are provided by Drupal core or additional modules. Some of the modules are required; the optional modules can be enabled from the <a href=":modules">Extend administration page</a>. Additional fields, formatters, and widgets may be provided by contributed modules, which you can find in the <a href=":contrib">contributed module section of Drupal.org</a>.', array(':modules' => \Drupal::url('system.modules_list'), ':contrib' => 'https://www.drupal.org/project/modules')) . '</dd>';
+      $output .= '<dd>' . t('The Field module provides the infrastructure for fields; the field types, formatters, and widgets are provided by Drupal core or additional modules. Some of the modules are required; the optional modules can be enabled from the <a href=":modules">Extend administration page</a>. Additional fields, formatters, and widgets may be provided by contributed modules, which you can find in the <a href=":contrib">contributed module section of Drupal.org</a>.', [':modules' => \Drupal::url('system.modules_list'), ':contrib' => 'https://www.drupal.org/project/modules']) . '</dd>';
 
       $output .= '<h3>' . t('Field, widget, and formatter information') . '</h3>';
 
       // Make a list of all widget, formatter, and field modules currently
       // enabled, ordered by displayed module name (module names are not
       // translated).
-      $items = array();
+      $items = [];
       $modules = \Drupal::moduleHandler()->getModuleList();
       $widgets = \Drupal::service('plugin.manager.field.widget')->getDefinitions();
       $field_types = \Drupal::service('plugin.manager.field.field_type')->getUiDefinitions();
       $formatters = \Drupal::service('plugin.manager.field.formatter')->getDefinitions();
-      $providers = array();
+      $providers = [];
       foreach (array_merge($field_types, $widgets, $formatters) as $plugin) {
         $providers[] = $plugin['provider'];
       }
@@ -111,7 +111,7 @@ function field_help($route_name, RouteMatchInterface $route_match) {
         if (isset($modules[$provider])) {
           $display = \Drupal::moduleHandler()->getName($provider);
           if (\Drupal::moduleHandler()->implementsHook($provider, 'help')) {
-            $items[] = \Drupal::l($display, new Url('help.page', array('name' => $provider)));
+            $items[] = \Drupal::l($display, new Url('help.page', ['name' => $provider]));
           }
           else {
             $items[] = $display;
@@ -121,10 +121,10 @@ function field_help($route_name, RouteMatchInterface $route_match) {
       if ($items) {
         $output .= '<dt>' . t('Provided by modules') . '</dt>';
         $output .= '<dd>' . t('Here is a list of the currently enabled field, formatter, and widget modules:');
-        $item_list = array(
+        $item_list = [
           '#theme' => 'item_list',
           '#items' => $items,
-        );
+        ];
         $output .= \Drupal::service('renderer')->renderPlain($item_list);
         $output .= '</dd>';
       }
@@ -132,10 +132,10 @@ function field_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<dt>' . t('Provided by Drupal core') . '</dt>';
       $output .= '<dd>' . t('As mentioned previously, some field types, widgets, and formatters are provided by Drupal core. Here are some notes on how to use some of these:');
       $output .= '<ul>';
-      $output .= '<li><p>' . t('<strong>Entity Reference</strong> fields allow you to create fields that contain links to other entities (such as content items, taxonomy terms, etc.) within the site. This allows you, for example, to include a link to a user within a content item. For more information, see <a href=":er_do">the online documentation for the Entity Reference module</a>.', array(':er_do' => 'https://drupal.org/documentation/modules/entityreference')) . '</p>';
+      $output .= '<li><p>' . t('<strong>Entity Reference</strong> fields allow you to create fields that contain links to other entities (such as content items, taxonomy terms, etc.) within the site. This allows you, for example, to include a link to a user within a content item. For more information, see <a href=":er_do">the online documentation for the Entity Reference module</a>.', [':er_do' => 'https://drupal.org/documentation/modules/entityreference']) . '</p>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing and displaying entity reference fields') . '</dt>';
-      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the entity reference field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => $field_ui_url)) . '</dd>';
+      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the entity reference field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => $field_ui_url]) . '</dd>';
       $output .= '<dt>' . t('Selecting reference type') . '</dt>';
       $output .= '<dd>' . t('In the field settings you can select which entity type you want to create a reference to.') . '</dd>';
       $output .= '<dt>' . t('Filtering and sorting reference fields') . '</dt>';
@@ -179,7 +179,7 @@ function field_entity_field_storage_info(EntityTypeInterface $entity_type) {
       ->execute();
     // Fetch all fields and key them by field name.
     $field_storages = FieldStorageConfig::loadMultiple($ids);
-    $result = array();
+    $result = [];
     foreach ($field_storages as $field_storage) {
       $result[$field_storage->getName()] = $field_storage;
     }
@@ -200,7 +200,7 @@ function field_entity_bundle_field_info(EntityTypeInterface $entity_type, $bundl
       ->execute();
     // Fetch all fields and key them by field name.
     $field_configs = FieldConfig::loadMultiple($ids);
-    $result = array();
+    $result = [];
     foreach ($field_configs as $field_instance) {
       $result[$field_instance->getName()] = $field_instance;
     }
@@ -283,7 +283,7 @@ function field_entity_bundle_delete($entity_type_id, $bundle) {
  *   An entity, initialized with the provided IDs.
  */
 function _field_create_entity_from_ids($ids) {
-  $id_properties = array();
+  $id_properties = [];
   $entity_type = \Drupal::entityManager()->getDefinition($ids->entity_type);
   if ($id_key = $entity_type->getKey('id')) {
     $id_properties[$id_key] = $ids->entity_id;
@@ -311,7 +311,7 @@ function field_config_import_steps_alter(&$sync_steps, ConfigImporter $config_im
     // Add a step to the beginning of the configuration synchronization process
     // to purge field data where the module that provides the field is being
     // uninstalled.
-    array_unshift($sync_steps, array('\Drupal\field\ConfigImporterFieldPurger', 'process'));
+    array_unshift($sync_steps, ['\Drupal\field\ConfigImporterFieldPurger', 'process']);
   };
 }
 
@@ -341,7 +341,7 @@ function field_form_config_admin_import_form_alter(&$form, FormStateInterface $f
         count($field_storages),
         'This synchronization will delete data from the field %fields.',
         'This synchronization will delete data from the fields: %fields.',
-        array('%fields' => implode(', ', $field_labels))
+        ['%fields' => implode(', ', $field_labels)]
       ), 'warning');
     }
   }
diff --git a/core/modules/field/field.purge.inc b/core/modules/field/field.purge.inc
index ae3e26694fbdcd3d1d8e7a3d0a57ab8d21fe7aab..519c6af2740cd9b86ab34845f173e4295a1cba05 100644
--- a/core/modules/field/field.purge.inc
+++ b/core/modules/field/field.purge.inc
@@ -73,10 +73,10 @@
  *   (optional) Limit the purge to a specific field storage.
  */
 function field_purge_batch($batch_size, $field_storage_uuid = NULL) {
-  $properties = array(
+  $properties = [
     'deleted' => TRUE,
     'include_deleted' => TRUE,
-  );
+  ];
   if ($field_storage_uuid) {
     $properties['field_storage_uuid'] = $field_storage_uuid;
   }
@@ -106,7 +106,7 @@ function field_purge_batch($batch_size, $field_storage_uuid = NULL) {
   }
 
   // Retrieve all deleted field storages. Any that have no fields can be purged.
-  $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: array();
+  $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: [];
   foreach ($deleted_storages as $field_storage) {
     $field_storage = new FieldStorageConfig($field_storage);
     if ($field_storage_uuid && $field_storage->uuid() != $field_storage_uuid) {
@@ -121,7 +121,7 @@ function field_purge_batch($batch_size, $field_storage_uuid = NULL) {
       continue;
     }
 
-    $fields = entity_load_multiple_by_properties('field_config', array('field_storage_uuid' => $field_storage->uuid(), 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['field_storage_uuid' => $field_storage->uuid(), 'include_deleted' => TRUE]);
     if (empty($fields)) {
       field_purge_field_storage($field_storage);
     }
@@ -144,7 +144,7 @@ function field_purge_field(FieldConfigInterface $field) {
   $state->set('field.field.deleted', $deleted_fields);
 
   // Invoke external hooks after the cache is cleared for API consistency.
-  \Drupal::moduleHandler()->invokeAll('field_purge_field', array($field));
+  \Drupal::moduleHandler()->invokeAll('field_purge_field', [$field]);
 }
 
 /**
@@ -159,9 +159,9 @@ function field_purge_field(FieldConfigInterface $field) {
  * @throws Drupal\field\FieldException
  */
 function field_purge_field_storage(FieldStorageConfigInterface $field_storage) {
-  $fields = entity_load_multiple_by_properties('field_config', array('field_storage_uuid' => $field_storage->uuid(), 'include_deleted' => TRUE));
+  $fields = entity_load_multiple_by_properties('field_config', ['field_storage_uuid' => $field_storage->uuid(), 'include_deleted' => TRUE]);
   if (count($fields) > 0) {
-    throw new FieldException(t('Attempt to purge a field storage @field_name that still has fields.', array('@field_name' => $field_storage->getName())));
+    throw new FieldException(t('Attempt to purge a field storage @field_name that still has fields.', ['@field_name' => $field_storage->getName()]));
   }
 
   $state = \Drupal::state();
@@ -173,7 +173,7 @@ function field_purge_field_storage(FieldStorageConfigInterface $field_storage) {
   \Drupal::entityManager()->getStorage($field_storage->getTargetEntityTypeId())->finalizePurge($field_storage);
 
   // Invoke external hooks after the cache is cleared for API consistency.
-  \Drupal::moduleHandler()->invokeAll('field_purge_field_storage', array($field_storage));
+  \Drupal::moduleHandler()->invokeAll('field_purge_field_storage', [$field_storage]);
 }
 
 /**
diff --git a/core/modules/field/src/ConfigImporterFieldPurger.php b/core/modules/field/src/ConfigImporterFieldPurger.php
index 4137294f6ff0c4c90c92dd28a4b584f1d2ae744e..3974511a66dfbc5f56d6ae10800ee65f4e3296e8 100644
--- a/core/modules/field/src/ConfigImporterFieldPurger.php
+++ b/core/modules/field/src/ConfigImporterFieldPurger.php
@@ -47,7 +47,7 @@ public static function process(array &$context, ConfigImporter $config_importer)
     }
     else {
       $context['finished'] = $context['sandbox']['field']['current_progress'] / $context['sandbox']['field']['steps_to_delete'];
-      $context['message'] = \Drupal::translation()->translate('Purging field @field_label', array('@field_label' => $field_storage->label()));
+      $context['message'] = \Drupal::translation()->translate('Purging field @field_label', ['@field_label' => $field_storage->label()]);
     }
   }
 
@@ -111,11 +111,11 @@ protected static function initializeSandbox(array &$context, ConfigImporter $con
   public static function getFieldStoragesToPurge(array $extensions, array $deletes) {
     $providers = array_keys($extensions['module']);
     $providers[] = 'core';
-    $storages_to_delete = array();
+    $storages_to_delete = [];
 
     // Gather fields that will be deleted during configuration synchronization
     // where the module that provides the field type is also being uninstalled.
-    $field_storage_ids = array();
+    $field_storage_ids = [];
     foreach ($deletes as $config_name) {
       $field_storage_config_prefix = \Drupal::entityManager()->getDefinition('field_storage_config')->getConfigPrefix();
       if (strpos($config_name, $field_storage_config_prefix . '.') === 0) {
@@ -134,7 +134,7 @@ public static function getFieldStoragesToPurge(array $extensions, array $deletes
 
     // Gather deleted fields from modules that are being uninstalled.
     /** @var \Drupal\field\FieldStorageConfigInterface[] $field_storages */
-    $field_storages = entity_load_multiple_by_properties('field_storage_config', array('deleted' => TRUE, 'include_deleted' => TRUE));
+    $field_storages = entity_load_multiple_by_properties('field_storage_config', ['deleted' => TRUE, 'include_deleted' => TRUE]);
     foreach ($field_storages as $field_storage) {
       if (!in_array($field_storage->getTypeProvider(), $providers)) {
         $storages_to_delete[$field_storage->id()] = $field_storage;
diff --git a/core/modules/field/src/Entity/FieldConfig.php b/core/modules/field/src/Entity/FieldConfig.php
index f5e8ab31fe577cbd2ca6f4d9c6ebc9744ecf0898..af2fcca738e7fe5c950a277985536fbf004fd438 100644
--- a/core/modules/field/src/Entity/FieldConfig.php
+++ b/core/modules/field/src/Entity/FieldConfig.php
@@ -193,7 +193,7 @@ public static function preDelete(EntityStorageInterface $storage, array $fields)
     parent::preDelete($storage, $fields);
     // Keep the field definitions in the state storage so we can use them
     // later during field_purge_batch().
-    $deleted_fields = $state->get('field.field.deleted') ?: array();
+    $deleted_fields = $state->get('field.field.deleted') ?: [];
     foreach ($fields as $field) {
       if (!$field->deleted) {
         $config = $field->toArray();
@@ -228,7 +228,7 @@ public static function postDelete(EntityStorageInterface $storage, array $fields
 
     // Delete the associated field storages if they are not used anymore and are
     // not persistent.
-    $storages_to_delete = array();
+    $storages_to_delete = [];
     foreach ($fields as $field) {
       $storage_definition = $field->getFieldStorageDefinition();
       if (!$field->deleted && !$field->isUninstalling() && $storage_definition->isDeletable()) {
@@ -306,7 +306,7 @@ public function isDisplayConfigurable($context) {
    */
   public function getDisplayOptions($display_context) {
     // Hide configurable fields by default.
-    return array('region' => 'hidden');
+    return ['region' => 'hidden'];
   }
 
   /**
diff --git a/core/modules/field/src/Entity/FieldStorageConfig.php b/core/modules/field/src/Entity/FieldStorageConfig.php
index 00883d61aa52fb79745fdeccbc87498fd1d59fcb..a63e54f98be63e0b934af1c27fb492e4c2439432 100644
--- a/core/modules/field/src/Entity/FieldStorageConfig.php
+++ b/core/modules/field/src/Entity/FieldStorageConfig.php
@@ -370,7 +370,7 @@ protected function preSaveUpdated(EntityStorageInterface $storage) {
 
     // See if any module forbids the update by throwing an exception. This
     // invokes hook_field_storage_config_update_forbid().
-    $module_handler->invokeAll('field_storage_config_update_forbid', array($this, $this->original));
+    $module_handler->invokeAll('field_storage_config_update_forbid', [$this, $this->original]);
 
     // Notify the entity manager. A listener can reject the definition
     // update as invalid by raising an exception, which stops execution before
@@ -407,7 +407,7 @@ public static function preDelete(EntityStorageInterface $storage, array $field_s
 
     // Keep the field definitions in the state storage so we can use them later
     // during field_purge_batch().
-    $deleted_storages = $state->get('field.storage.deleted') ?: array();
+    $deleted_storages = $state->get('field.storage.deleted') ?: [];
     foreach ($field_storages as $field_storage) {
       if (!$field_storage->deleted) {
         $config = $field_storage->toArray();
@@ -444,12 +444,12 @@ public function getSchema() {
       $class = $this->getFieldItemClass();
       $schema = $class::schema($this);
       // Fill in default values for optional entries.
-      $schema += array(
-        'columns' => array(),
-        'unique keys' => array(),
-        'indexes' => array(),
-        'foreign keys' => array(),
-      );
+      $schema += [
+        'columns' => [],
+        'unique keys' => [],
+        'indexes' => [],
+        'foreign keys' => [],
+      ];
 
       // Merge custom indexes with those specified by the field type. Custom
       // indexes prevail.
@@ -499,7 +499,7 @@ public function getBundles() {
         return $map[$this->getTargetEntityTypeId()][$this->getName()]['bundles'];
       }
     }
-    return array();
+    return [];
   }
 
   /**
@@ -719,7 +719,7 @@ public function __sleep() {
    * {@inheritdoc}
    */
   public function getConstraints() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/field/src/FieldConfigStorage.php b/core/modules/field/src/FieldConfigStorage.php
index 0870cd422fc375b38ef04c05cc71b281aec54972..42d9634612387c60faff354910e2a6d98315d328 100644
--- a/core/modules/field/src/FieldConfigStorage.php
+++ b/core/modules/field/src/FieldConfigStorage.php
@@ -95,12 +95,12 @@ public function importDelete($name, Config $new_config, Config $old_config) {
   /**
    * {@inheritdoc}
    */
-  public function loadByProperties(array $conditions = array()) {
+  public function loadByProperties(array $conditions = []) {
     // Include deleted fields if specified in the $conditions parameters.
     $include_deleted = isset($conditions['include_deleted']) ? $conditions['include_deleted'] : FALSE;
     unset($conditions['include_deleted']);
 
-    $fields = array();
+    $fields = [];
 
     // Get fields stored in configuration. If we are explicitly looking for
     // deleted fields only, this can be skipped, because they will be
@@ -109,7 +109,7 @@ public function loadByProperties(array $conditions = array()) {
       if (isset($conditions['entity_type']) && isset($conditions['bundle']) && isset($conditions['field_name'])) {
         // Optimize for the most frequent case where we do have a specific ID.
         $id = $conditions['entity_type'] . '.' . $conditions['bundle'] . '.' . $conditions['field_name'];
-        $fields = $this->loadMultiple(array($id));
+        $fields = $this->loadMultiple([$id]);
       }
       else {
         // No specific ID, we need to examine all existing fields.
@@ -119,8 +119,8 @@ public function loadByProperties(array $conditions = array()) {
 
     // Merge deleted fields (stored in state) if needed.
     if ($include_deleted || !empty($conditions['deleted'])) {
-      $deleted_fields = $this->state->get('field.field.deleted') ?: array();
-      $deleted_storages = $this->state->get('field.storage.deleted') ?: array();
+      $deleted_fields = $this->state->get('field.field.deleted') ?: [];
+      $deleted_storages = $this->state->get('field.storage.deleted') ?: [];
       foreach ($deleted_fields as $id => $config) {
         // If the field storage itself is deleted, inject it directly in the field.
         if (isset($deleted_storages[$config['field_storage_uuid']])) {
@@ -131,7 +131,7 @@ public function loadByProperties(array $conditions = array()) {
     }
 
     // Collect matching fields.
-    $matching_fields = array();
+    $matching_fields = [];
     foreach ($fields as $field) {
       // Some conditions are checked against the field storage.
       $field_storage = $field->getFieldStorageDefinition();
diff --git a/core/modules/field/src/FieldStorageConfigStorage.php b/core/modules/field/src/FieldStorageConfigStorage.php
index cce8412c05c2367d367008f687e25f172acb5b4b..7a793f6829ba769f18e9c2e2aa1e7bed8456e3b7 100644
--- a/core/modules/field/src/FieldStorageConfigStorage.php
+++ b/core/modules/field/src/FieldStorageConfigStorage.php
@@ -94,13 +94,13 @@ public static function createInstance(ContainerInterface $container, EntityTypeI
   /**
    * {@inheritdoc}
    */
-  public function loadByProperties(array $conditions = array()) {
+  public function loadByProperties(array $conditions = []) {
     // Include deleted fields if specified in the $conditions parameters.
     $include_deleted = isset($conditions['include_deleted']) ? $conditions['include_deleted'] : FALSE;
     unset($conditions['include_deleted']);
 
     /** @var \Drupal\field\FieldStorageConfigInterface[] $storages */
-    $storages = array();
+    $storages = [];
 
     // Get field storages living in configuration. If we are explicitly looking
     // for deleted storages only, this can be skipped, because they will be
@@ -109,7 +109,7 @@ public function loadByProperties(array $conditions = array()) {
       if (isset($conditions['entity_type']) && isset($conditions['field_name'])) {
         // Optimize for the most frequent case where we do have a specific ID.
         $id = $conditions['entity_type'] . $conditions['field_name'];
-        $storages = $this->loadMultiple(array($id));
+        $storages = $this->loadMultiple([$id]);
       }
       else {
         // No specific ID, we need to examine all existing storages.
@@ -119,14 +119,14 @@ public function loadByProperties(array $conditions = array()) {
 
     // Merge deleted field storages (living in state) if needed.
     if ($include_deleted || !empty($conditions['deleted'])) {
-      $deleted_storages = $this->state->get('field.storage.deleted') ?: array();
+      $deleted_storages = $this->state->get('field.storage.deleted') ?: [];
       foreach ($deleted_storages as $id => $config) {
         $storages[$id] = $this->create($config);
       }
     }
 
     // Collect matching fields.
-    $matches = array();
+    $matches = [];
     foreach ($storages as $field) {
       foreach ($conditions as $key => $value) {
         // Extract the actual value against which the condition is checked.
diff --git a/core/modules/field/src/Plugin/migrate/process/d6/FieldFormatterSettingsDefaults.php b/core/modules/field/src/Plugin/migrate/process/d6/FieldFormatterSettingsDefaults.php
index 034ab0b9cdfbbfed5d5d846701dcb9d1dc517971..9a8e86abb7352bc0b6cc8e013ee620f01ca8a2b4 100644
--- a/core/modules/field/src/Plugin/migrate/process/d6/FieldFormatterSettingsDefaults.php
+++ b/core/modules/field/src/Plugin/migrate/process/d6/FieldFormatterSettingsDefaults.php
@@ -26,7 +26,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
     if (isset($value[1])) {
       $module = $row->getSourceProperty('module');
       if ($module === 'date') {
-        $value = array('format_type' => 'fallback');
+        $value = ['format_type' => 'fallback'];
       }
       elseif ($module === 'number') {
         // We have to do the lookup here in the process plugin because for
@@ -35,7 +35,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
         return $this->numberSettings($row->getDestinationProperty('options/type'), $value[1]);
       }
       else {
-        $value = array();
+        $value = [];
       }
     }
     return $value;
diff --git a/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceDefaults.php b/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceDefaults.php
index 3ff0d8cb6f27df6f1ceae98f986d5a692b451174..748eca2896244d0194d6a165cc667a4b955027a1 100644
--- a/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceDefaults.php
+++ b/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceDefaults.php
@@ -20,7 +20,7 @@ class FieldInstanceDefaults extends ProcessPluginBase {
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     list($widget_type, $widget_settings) = $value;
-    $default = array();
+    $default = [];
 
     switch ($widget_type) {
       case 'text_textfield':
@@ -58,7 +58,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
         break;
     }
     if (!empty($default)) {
-      $default = array($default);
+      $default = [$default];
     }
     return $default;
   }
diff --git a/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceSettings.php b/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceSettings.php
index 080a4d7355aa53ec28f9cb30020969de761bfb19..82f25b5b2d08015b62c33ba55f1a9eb199204e44 100644
--- a/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceSettings.php
+++ b/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceSettings.php
@@ -20,7 +20,7 @@ class FieldInstanceSettings extends ProcessPluginBase {
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     list($widget_type, $widget_settings, $field_settings) = $value;
-    $settings = array();
+    $settings = [];
     switch ($widget_type) {
       case 'number':
         $settings['min'] = $field_settings['min'];
@@ -33,7 +33,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
         // $settings['url'] = $widget_settings['default_value'][0]['url'];
         // D6 has optional, required, value and none. D8 only has disabled (0)
         // optional (1) and required (2).
-        $map = array('disabled' => 0, 'optional' => 1, 'required' => 2);
+        $map = ['disabled' => 0, 'optional' => 1, 'required' => 2];
         $settings['title'] = $map[$field_settings['title']];
         break;
 
diff --git a/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceWidgetSettings.php b/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceWidgetSettings.php
index 1c7ede64f06ed03ba2eac1492613b056856dc928..62c982963f2a54f1365a712820e2d262a3c04be6 100644
--- a/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceWidgetSettings.php
+++ b/core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceWidgetSettings.php
@@ -41,41 +41,41 @@ public function getSettings($widget_type, $widget_settings) {
     $size = isset($widget_settings['size']) ? $widget_settings['size'] : 60;
     $rows = isset($widget_settings['rows']) ? $widget_settings['rows'] : 5;
 
-    $settings = array(
-      'text_textfield' => array(
+    $settings = [
+      'text_textfield' => [
         'size' => $size,
         'placeholder' => '',
-      ),
-      'text_textarea' => array(
+      ],
+      'text_textarea' => [
         'rows' => $rows,
         'placeholder' => '',
-      ),
-      'number' => array(
+      ],
+      'number' => [
         'placeholder' => '',
-      ),
-      'email_textfield' => array(
+      ],
+      'email_textfield' => [
         'placeholder' => '',
-      ),
-      'link' => array(
+      ],
+      'link' => [
         'placeholder_url' => '',
         'placeholder_title' => '',
-      ),
-      'filefield_widget' => array(
+      ],
+      'filefield_widget' => [
         'progress_indicator' => $progress,
-      ),
-      'imagefield_widget' => array(
+      ],
+      'imagefield_widget' => [
         'progress_indicator' => $progress,
         'preview_image_style' => 'thumbnail',
-      ),
-      'optionwidgets_onoff' => array(
+      ],
+      'optionwidgets_onoff' => [
         'display_label' => FALSE,
-      ),
-      'phone_textfield' => array(
+      ],
+      'phone_textfield' => [
         'placeholder' => '',
-      ),
-    );
+      ],
+    ];
 
-    return isset($settings[$widget_type]) ? $settings[$widget_type] : array();
+    return isset($settings[$widget_type]) ? $settings[$widget_type] : [];
   }
 
 }
diff --git a/core/modules/field/src/Plugin/migrate/process/d6/FieldSettings.php b/core/modules/field/src/Plugin/migrate/process/d6/FieldSettings.php
index 018afe6151cce03193e95fe3977465a3b718b1d0..1bb5b77ae5cf1c9ea88cba6ec962e4ea4f59ef65 100644
--- a/core/modules/field/src/Plugin/migrate/process/d6/FieldSettings.php
+++ b/core/modules/field/src/Plugin/migrate/process/d6/FieldSettings.php
@@ -59,26 +59,26 @@ public function getSettings($field_type, $global_settings) {
       }
     }
 
-    $settings = array(
-      'text' => array(
+    $settings = [
+      'text' => [
         'max_length' => $max_length,
-      ),
-      'datetime' => array('datetime_type' => 'datetime'),
-      'list_string' => array(
+      ],
+      'datetime' => ['datetime_type' => 'datetime'],
+      'list_string' => [
         'allowed_values' => $allowed_values,
-      ),
-      'list_integer' => array(
+      ],
+      'list_integer' => [
         'allowed_values' => $allowed_values,
-      ),
-      'list_float' => array(
+      ],
+      'list_float' => [
         'allowed_values' => $allowed_values,
-      ),
-      'boolean' => array(
+      ],
+      'boolean' => [
         'allowed_values' => $allowed_values,
-      ),
-    );
+      ],
+    ];
 
-    return isset($settings[$field_type]) ? $settings[$field_type] : array();
+    return isset($settings[$field_type]) ? $settings[$field_type] : [];
   }
 
 }
diff --git a/core/modules/field/src/Plugin/migrate/process/d7/FieldInstanceDefaults.php b/core/modules/field/src/Plugin/migrate/process/d7/FieldInstanceDefaults.php
index 08501abb94ea07d1d3940370c6b5a334f1f335dd..2a463811be8c6833458ea21846879c1eebfb0177 100644
--- a/core/modules/field/src/Plugin/migrate/process/d7/FieldInstanceDefaults.php
+++ b/core/modules/field/src/Plugin/migrate/process/d7/FieldInstanceDefaults.php
@@ -20,7 +20,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
     list($default_value, $widget_settings) = $value;
     $widget_type = $widget_settings['type'];
 
-    $default = array();
+    $default = [];
 
     foreach ($default_value as $item) {
       switch ($widget_type) {
diff --git a/core/modules/field/src/Plugin/migrate/process/d7/FieldInstanceSettings.php b/core/modules/field/src/Plugin/migrate/process/d7/FieldInstanceSettings.php
index d28007986fcc8c721ae566739e00b208c01cc0bd..70a9498c41ef4f1a09da632e3786f3966eb0cfe4 100644
--- a/core/modules/field/src/Plugin/migrate/process/d7/FieldInstanceSettings.php
+++ b/core/modules/field/src/Plugin/migrate/process/d7/FieldInstanceSettings.php
@@ -52,13 +52,13 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
     switch ($widget_type) {
       case 'image_image':
         $settings = $instance_settings;
-        $settings['default_image'] = array(
+        $settings['default_image'] = [
           'alt' => '',
           'title' => '',
           'width' => NULL,
           'height' => NULL,
           'uuid' => '',
-        );
+        ];
         break;
 
       default:
diff --git a/core/modules/field/src/Plugin/migrate/process/d7/FieldSettings.php b/core/modules/field/src/Plugin/migrate/process/d7/FieldSettings.php
index bec448a2c278b6b7394887bbaa958190e94053ab..dc629a448289d64bc18df0e5206152e3f6124064 100644
--- a/core/modules/field/src/Plugin/migrate/process/d7/FieldSettings.php
+++ b/core/modules/field/src/Plugin/migrate/process/d7/FieldSettings.php
@@ -22,7 +22,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
     switch ($row->getSourceProperty('type')) {
       case 'image':
         if (!is_array($value['default_image'])) {
-          $value['default_image'] = array('uuid' => '');
+          $value['default_image'] = ['uuid' => ''];
         }
         break;
 
diff --git a/core/modules/field/src/Plugin/migrate/source/d6/Field.php b/core/modules/field/src/Plugin/migrate/source/d6/Field.php
index cb108d700c8131882a57b4c14c4daa698de6d94c..7c9e620dd80364a152b20a052d21dce4260f1923 100644
--- a/core/modules/field/src/Plugin/migrate/source/d6/Field.php
+++ b/core/modules/field/src/Plugin/migrate/source/d6/Field.php
@@ -20,7 +20,7 @@ class Field extends DrupalSqlBase {
    */
   public function query() {
     $query = $this->select('content_node_field', 'cnf')
-      ->fields('cnf', array(
+      ->fields('cnf', [
         'field_name',
         'type',
         'global_settings',
@@ -31,7 +31,7 @@ public function query() {
         'db_columns',
         'active',
         'locked',
-      ))
+      ])
       ->distinct();
     // Only import fields which are actually being used.
     $query->innerJoin('content_node_field_instance', 'cnfi', 'cnfi.field_name = cnf.field_name');
@@ -43,7 +43,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'field_name' => $this->t('Field name'),
       'type' => $this->t('Type (text, integer, ....)'),
       'widget_type' => $this->t('An instance-specific widget type'),
@@ -55,7 +55,7 @@ public function fields() {
       'db_columns' => $this->t('DB Columns'),
       'active' => $this->t('Active'),
       'locked' => $this->t('Locked'),
-    );
+    ];
   }
 
   /**
@@ -96,10 +96,10 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function getIds() {
-    $ids['field_name'] = array(
+    $ids['field_name'] = [
       'type' => 'string',
       'alias' => 'cnf',
-    );
+    ];
     return $ids;
   }
 
diff --git a/core/modules/field/src/Plugin/migrate/source/d6/FieldInstance.php b/core/modules/field/src/Plugin/migrate/source/d6/FieldInstance.php
index 5436df64a3c90f0b35f3ab38cce998c94f8b0a49..dbea7a8e7335ce230eec490be42e10743072695f 100644
--- a/core/modules/field/src/Plugin/migrate/source/d6/FieldInstance.php
+++ b/core/modules/field/src/Plugin/migrate/source/d6/FieldInstance.php
@@ -33,7 +33,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'field_name' => $this->t('The machine name of field.'),
       'type_name' => $this->t('Content type where this field is in use.'),
       'weight' => $this->t('Weight.'),
@@ -45,7 +45,7 @@ public function fields() {
       'widget_module' => $this->t('Module that implements widget.'),
       'widget_active' => $this->t('Status of widget'),
       'module' => $this->t('The module that provides the field.'),
-    );
+    ];
   }
 
   /**
@@ -66,15 +66,15 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function getIds() {
-    $ids = array(
-      'field_name' => array(
+    $ids = [
+      'field_name' => [
         'type' => 'string',
         'alias' => 'cnfi',
-      ),
-      'type_name' => array(
+      ],
+      'type_name' => [
         'type' => 'string',
-      ),
-    );
+      ],
+    ];
     return $ids;
   }
 
diff --git a/core/modules/field/src/Plugin/migrate/source/d6/FieldInstancePerFormDisplay.php b/core/modules/field/src/Plugin/migrate/source/d6/FieldInstancePerFormDisplay.php
index 44bad618e95a7b7c31c7ccd023dee1ad90151213..21baa9ee211f0d3c4d722aa508328102dc9ecc9b 100644
--- a/core/modules/field/src/Plugin/migrate/source/d6/FieldInstancePerFormDisplay.php
+++ b/core/modules/field/src/Plugin/migrate/source/d6/FieldInstancePerFormDisplay.php
@@ -18,7 +18,7 @@ class FieldInstancePerFormDisplay extends DrupalSqlBase {
    * {@inheritdoc}
    */
   protected function initializeIterator() {
-    $rows = array();
+    $rows = [];
     $result = $this->prepareQuery()->execute();
     while ($field_row = $result->fetchAssoc()) {
       $bundle = $field_row['type_name'];
@@ -44,7 +44,7 @@ protected function initializeIterator() {
    */
   public function query() {
     $query = $this->select('content_node_field_instance', 'cnfi')
-      ->fields('cnfi', array(
+      ->fields('cnfi', [
         'field_name',
         'type_name',
         'weight',
@@ -55,11 +55,11 @@ public function query() {
         'description',
         'widget_module',
         'widget_active',
-      ))
-      ->fields('cnf', array(
+      ])
+      ->fields('cnf', [
         'type',
         'module',
-      ));
+      ]);
     $query->join('content_node_field', 'cnf', 'cnfi.field_name = cnf.field_name');
     $query->orderBy('cnfi.weight');
 
@@ -70,7 +70,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'field_name' => $this->t('The machine name of field.'),
       'type_name' => $this->t('Content type where this field is used.'),
       'weight' => $this->t('Weight.'),
@@ -81,7 +81,7 @@ public function fields() {
       'description' => $this->t('A description of field.'),
       'widget_module' => $this->t('Module that implements widget.'),
       'widget_active' => $this->t('Status of widget'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/field/src/Plugin/migrate/source/d6/FieldInstancePerViewMode.php b/core/modules/field/src/Plugin/migrate/source/d6/FieldInstancePerViewMode.php
index 2e1832e1b0a41a9c6408d84b7852f7626958b1a4..43d27820db00951e05fc2f19c0ade3288f7f761d 100644
--- a/core/modules/field/src/Plugin/migrate/source/d6/FieldInstancePerViewMode.php
+++ b/core/modules/field/src/Plugin/migrate/source/d6/FieldInstancePerViewMode.php
@@ -18,7 +18,7 @@ class FieldInstancePerViewMode extends ViewModeBase {
    * {@inheritdoc}
    */
   protected function initializeIterator() {
-    $rows = array();
+    $rows = [];
     $result = $this->prepareQuery()->execute();
     while ($field_row = $result->fetchAssoc()) {
       // These are added to every view mode row.
@@ -52,18 +52,18 @@ protected function initializeIterator() {
    */
   public function query() {
     $query = $this->select('content_node_field_instance', 'cnfi')
-      ->fields('cnfi', array(
+      ->fields('cnfi', [
         'field_name',
         'type_name',
         'weight',
         'label',
         'display_settings',
         'widget_settings',
-      ))
-      ->fields('cnf', array(
+      ])
+      ->fields('cnf', [
         'type',
         'module',
-      ));
+      ]);
     $query->join('content_node_field', 'cnf', 'cnfi.field_name = cnf.field_name');
     $query->orderBy('cnfi.weight');
 
@@ -74,7 +74,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'field_name' => $this->t('The machine name of field.'),
       'type_name' => $this->t('Content type where this field is used.'),
       'weight' => $this->t('Weight.'),
@@ -85,7 +85,7 @@ public function fields() {
       'description' => $this->t('A description of field.'),
       'widget_module' => $this->t('Module that implements widget.'),
       'widget_active' => $this->t('Status of widget'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/field/src/Plugin/migrate/source/d7/Field.php b/core/modules/field/src/Plugin/migrate/source/d7/Field.php
index 2e8f74551ca2927117f821037e055635379841a2..d9aef9162a69760b9567901d26f4c1f2f638b5b7 100644
--- a/core/modules/field/src/Plugin/migrate/source/d7/Field.php
+++ b/core/modules/field/src/Plugin/migrate/source/d7/Field.php
@@ -21,7 +21,7 @@ public function query() {
     $query = $this->select('field_config', 'fc')
       ->distinct()
       ->fields('fc')
-      ->fields('fci', array('entity_type'))
+      ->fields('fci', ['entity_type'])
       ->condition('fc.active', 1)
       ->condition('fc.deleted', 0)
       ->condition('fc.storage_active', 1);
@@ -34,7 +34,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'field_name' => $this->t('The name of this field.'),
       'type' => $this->t('The type of this field.'),
       'module' => $this->t('The module that implements the field type.'),
@@ -42,7 +42,7 @@ public function fields() {
       'locked' => $this->t('Locked'),
       'cardinality' => $this->t('Cardinality'),
       'translatable' => $this->t('Translatable'),
-    );
+    ];
   }
 
   /**
@@ -59,16 +59,16 @@ public function prepareRow(Row $row, $keep = TRUE) {
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'field_name' => array(
+    return [
+      'field_name' => [
         'type' => 'string',
         'alias' => 'fc',
-      ),
-      'entity_type' => array(
+      ],
+      'entity_type' => [
         'type' => 'string',
         'alias' => 'fci',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/field/src/Plugin/migrate/source/d7/FieldInstance.php b/core/modules/field/src/Plugin/migrate/source/d7/FieldInstance.php
index 3da02b92a0cb7a477b971169d9131e5efc69c12a..d06336e1538bcc838240993942eb9aacdd4944b4 100644
--- a/core/modules/field/src/Plugin/migrate/source/d7/FieldInstance.php
+++ b/core/modules/field/src/Plugin/migrate/source/d7/FieldInstance.php
@@ -25,7 +25,7 @@ public function query() {
       ->condition('fc.active', 1)
       ->condition('fc.deleted', 0)
       ->condition('fc.storage_active', 1)
-      ->fields('fc', array('type'));
+      ->fields('fc', ['type']);
 
     $query->innerJoin('field_config', 'fc', 'fci.field_id = fc.id');
     $query->addField('fc', 'data', 'field_data');
@@ -46,7 +46,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'field_name' => $this->t('The machine name of field.'),
       'entity_type' => $this->t('The entity type.'),
       'bundle' => $this->t('The entity bundle.'),
@@ -55,7 +55,7 @@ public function fields() {
       'widget_settings' => $this->t('Widget settings.'),
       'display_settings' => $this->t('Display settings.'),
       'field_settings' => $this->t('Field settings.'),
-    );
+    ];
   }
 
   /**
@@ -68,7 +68,7 @@ public function prepareRow(Row $row) {
     $row->setSourceProperty('description', $data['description']);
     $row->setSourceProperty('required', $data['required']);
 
-    $default_value = !empty($data['default_value']) ? $data['default_value'] : array();
+    $default_value = !empty($data['default_value']) ? $data['default_value'] : [];
     if ($data['widget']['type'] == 'email_textfield' && $default_value) {
       $default_value[0]['value'] = $default_value[0]['email'];
       unset($default_value[0]['email']);
@@ -112,20 +112,20 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'entity_type' => array(
+    return [
+      'entity_type' => [
         'type' => 'string',
         'alias' => 'fci',
-      ),
-      'bundle' => array(
+      ],
+      'bundle' => [
         'type' => 'string',
         'alias' => 'fci',
-      ),
-      'field_name' => array(
+      ],
+      'field_name' => [
         'type' => 'string',
         'alias' => 'fci',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/field/src/Plugin/migrate/source/d7/FieldInstancePerFormDisplay.php b/core/modules/field/src/Plugin/migrate/source/d7/FieldInstancePerFormDisplay.php
index 62de5d9d6b4b65700eda060c43aedd8044ed9308..ac599ec0a517ebd7ba18d419a030be4634c6f857 100644
--- a/core/modules/field/src/Plugin/migrate/source/d7/FieldInstancePerFormDisplay.php
+++ b/core/modules/field/src/Plugin/migrate/source/d7/FieldInstancePerFormDisplay.php
@@ -19,16 +19,16 @@ class FieldInstancePerFormDisplay extends DrupalSqlBase {
    */
   public function query() {
     $query = $this->select('field_config_instance', 'fci')
-      ->fields('fci', array(
+      ->fields('fci', [
         'field_name',
         'bundle',
         'data',
         'entity_type'
-      ))
-      ->fields('fc', array(
+      ])
+      ->fields('fc', [
         'type',
         'module',
-      ));
+      ]);
     $query->join('field_config', 'fc', 'fci.field_id = fc.id');
     return $query;
   }
@@ -47,27 +47,27 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'field_name' => $this->t('The machine name of field.'),
       'bundle' => $this->t('Content type where this field is used.'),
       'data' => $this->t('Field configuration data.'),
       'entity_type' => $this->t('The entity type.'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'bundle' => array(
+    return [
+      'bundle' => [
         'type' => 'string',
-      ),
-      'field_name' => array(
+      ],
+      'field_name' => [
         'type' => 'string',
         'alias' => 'fci',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/field/src/Plugin/migrate/source/d7/FieldInstancePerViewMode.php b/core/modules/field/src/Plugin/migrate/source/d7/FieldInstancePerViewMode.php
index 72a845bcaf0cd8bc60b5f8f046ac64f1ad44480b..7339e764a889334b7a36d0ceb3560b581f115cb3 100644
--- a/core/modules/field/src/Plugin/migrate/source/d7/FieldInstancePerViewMode.php
+++ b/core/modules/field/src/Plugin/migrate/source/d7/FieldInstancePerViewMode.php
@@ -18,7 +18,7 @@ class FieldInstancePerViewMode extends DrupalSqlBase {
    * {@inheritdoc}
    */
   protected function initializeIterator() {
-    $rows = array();
+    $rows = [];
     $result = $this->prepareQuery()->execute();
     foreach ($result as $field_instance) {
       $data = unserialize($field_instance['data']);
@@ -53,7 +53,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'entity_type' => $this->t('The entity type ID.'),
       'bundle' => $this->t('The bundle ID.'),
       'field_name' => $this->t('Machine name of the field.'),
@@ -64,27 +64,27 @@ public function fields() {
       'settings' => $this->t('Array of formatter-specific settings.'),
       'module' => $this->t('The module providing the formatter.'),
       'weight' => $this->t('Display weight of the field.'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'entity_type' => array(
+    return [
+      'entity_type' => [
         'type' => 'string',
-      ),
-      'bundle' => array(
+      ],
+      'bundle' => [
         'type' => 'string',
-      ),
-      'view_mode' => array(
+      ],
+      'view_mode' => [
         'type' => 'string',
-      ),
-      'field_name' => array(
+      ],
+      'field_name' => [
         'type' => 'string',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/field/src/Tests/Boolean/BooleanFieldTest.php b/core/modules/field/src/Tests/Boolean/BooleanFieldTest.php
index 5fa491b20a959442235e1133f3e4250ad31d3f5d..17292e09d8d51b7d017685178ca86c007080ed3a 100644
--- a/core/modules/field/src/Tests/Boolean/BooleanFieldTest.php
+++ b/core/modules/field/src/Tests/Boolean/BooleanFieldTest.php
@@ -47,12 +47,12 @@ class BooleanFieldTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalLogin($this->drupalCreateUser(array(
+    $this->drupalLogin($this->drupalCreateUser([
       'view test entity',
       'administer entity_test content',
       'administer entity_test form display',
       'administer entity_test fields',
-    )));
+    ]));
   }
 
   /**
@@ -65,36 +65,36 @@ function testBooleanField() {
 
     // Create a field with settings to validate.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'boolean',
-    ));
+    ]);
     $this->fieldStorage->save();
-    $this->field = FieldConfig::create(array(
+    $this->field = FieldConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
       'label' => $label,
       'required' => TRUE,
-      'settings' => array(
+      'settings' => [
         'on_label' => $on,
         'off_label' => $off,
-      ),
-    ));
+      ],
+    ]);
     $this->field->save();
 
     // Create a form display for the default form mode.
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'boolean_checkbox',
-      ))
+      ])
       ->save();
     // Create a display for the full view mode.
     entity_get_display('entity_test', 'entity_test', 'full')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'boolean',
-      ))
+      ])
       ->save();
 
     // Display creation form.
@@ -104,13 +104,13 @@ function testBooleanField() {
     $this->assertNoRaw($on, 'Does not use the "On" label.');
 
     // Submit and ensure it is accepted.
-    $edit = array(
+    $edit = [
       "{$field_name}[value]" => 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     // Verify that boolean value is displayed.
     $entity = EntityTest::load($id);
@@ -121,12 +121,12 @@ function testBooleanField() {
 
     // Test with "On" label option.
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'boolean_checkbox',
-        'settings' => array(
+        'settings' => [
           'display_label' => FALSE,
-        )
-      ))
+        ]
+      ])
       ->save();
 
     $this->drupalGet('entity_test/add');
@@ -136,9 +136,9 @@ function testBooleanField() {
 
     // Test if we can change the on label.
     $on = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'settings[on_label]' => $on,
-    );
+    ];
     $this->drupalPostForm('entity_test/structure/entity_test/fields/entity_test.entity_test.' . $field_name, $edit, t('Save settings'));
     // Check if we see the updated labels in the creation form.
     $this->drupalGet('entity_test/add');
@@ -150,7 +150,7 @@ function testBooleanField() {
     $this->drupalGet($fieldEditUrl);
 
     // Click on the widget settings button to open the widget settings form.
-    $this->drupalPostAjaxForm(NULL, array(), $field_name . "_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], $field_name . "_settings_edit");
 
     $this->assertText(
       'Use field label instead of the "On label" as label',
@@ -158,7 +158,7 @@ function testBooleanField() {
     );
 
     // Enable setting.
-    $edit = array('fields[' . $field_name . '][settings_edit_form][settings][display_label]' => 1);
+    $edit = ['fields[' . $field_name . '][settings_edit_form][settings][display_label]' => 1];
     $this->drupalPostAjaxForm(NULL, $edit, $field_name . "_plugin_settings_update");
     $this->drupalPostForm(NULL, NULL, 'Save');
 
@@ -167,7 +167,7 @@ function testBooleanField() {
     $this->drupalGet($fieldEditUrl);
     $this->assertText('Use field label: Yes', 'Checking the display settings checkbox updated the value.');
 
-    $this->drupalPostAjaxForm(NULL, array(), $field_name . "_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], $field_name . "_settings_edit");
     $this->assertText(
       'Use field label instead of the "On label" as label',
       t('Display setting checkbox is available')
diff --git a/core/modules/field/src/Tests/Boolean/BooleanFormatterSettingsTest.php b/core/modules/field/src/Tests/Boolean/BooleanFormatterSettingsTest.php
index 0d0c475f30bf5dfb23e384e34985c2bfc8bbd883..f45442060bc976f4e2c654c07e18b4db6be403da 100644
--- a/core/modules/field/src/Tests/Boolean/BooleanFormatterSettingsTest.php
+++ b/core/modules/field/src/Tests/Boolean/BooleanFormatterSettingsTest.php
@@ -44,10 +44,10 @@ protected function setUp() {
 
     // Create a content type. Use Node because it has Field UI pages that work.
     $type_name = Unicode::strtolower($this->randomMachineName(8)) . '_test';
-    $type = $this->drupalCreateContentType(array('name' => $type_name, 'type' => $type_name));
+    $type = $this->drupalCreateContentType(['name' => $type_name, 'type' => $type_name]);
     $this->bundle = $type->id();
 
-    $admin_user = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node fields', 'administer node display', 'bypass node access', 'administer nodes'));
+    $admin_user = $this->drupalCreateUser(['access content', 'administer content types', 'administer node fields', 'administer node display', 'bypass node access', 'administer nodes']);
     $this->drupalLogin($admin_user);
 
     $this->fieldName = Unicode::strtolower($this->randomMachineName(8));
@@ -81,14 +81,14 @@ function testBooleanFormatterSettings() {
     // List the options we expect to see on the settings form. Omit the one
     // with the Unicode check/x characters, which does not appear to work
     // well in WebTestBase.
-    $options = array(
+    $options = [
       'Yes / No',
       'True / False',
       'On / Off',
       'Enabled / Disabled',
       '1 / 0',
       'Custom',
-    );
+    ];
 
     // Define what the "default" option should look like, depending on the
     // field settings.
@@ -96,29 +96,29 @@ function testBooleanFormatterSettings() {
 
     // For several different values of the field settings, test that the
     // options, including default, are shown correctly.
-    $settings = array(
-      array('Yes', 'No'),
-      array('On', 'Off'),
-      array('TRUE', 'FALSE'),
-    );
+    $settings = [
+      ['Yes', 'No'],
+      ['On', 'Off'],
+      ['TRUE', 'FALSE'],
+    ];
 
     foreach ($settings as $values) {
       // Set up the field settings.
       $this->drupalGet('admin/structure/types/manage/' . $this->bundle . '/fields/node.' . $this->bundle . '.' . $this->fieldName);
-      $this->drupalPostForm(NULL, array(
+      $this->drupalPostForm(NULL, [
         'settings[on_label]' => $values[0],
         'settings[off_label]' => $values[1],
-      ), 'Save settings');
+      ], 'Save settings');
 
       // Open the Manage Display page and trigger the field settings form.
       $this->drupalGet('admin/structure/types/manage/' . $this->bundle . '/display');
-      $this->drupalPostAjaxForm(NULL, array(), $this->fieldName . '_settings_edit');
+      $this->drupalPostAjaxForm(NULL, [], $this->fieldName . '_settings_edit');
 
       // Test that the settings options are present in the correct format.
       foreach ($options as $string) {
         $this->assertText($string);
       }
-      $this->assertText(SafeMarkup::format($default, array('@on' => $values[0], '@off' => $values[1])));
+      $this->assertText(SafeMarkup::format($default, ['@on' => $values[0], '@off' => $values[1]]));
     }
 
     foreach ($settings as $values) {
diff --git a/core/modules/field/src/Tests/Email/EmailFieldTest.php b/core/modules/field/src/Tests/Email/EmailFieldTest.php
index 7c22861e8160617ee038e5b2e44fe72b2c0b6625..779870ced3d206f6c64186d398a95816492c57b1 100644
--- a/core/modules/field/src/Tests/Email/EmailFieldTest.php
+++ b/core/modules/field/src/Tests/Email/EmailFieldTest.php
@@ -20,7 +20,7 @@ class EmailFieldTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'entity_test', 'field_ui');
+  public static $modules = ['node', 'entity_test', 'field_ui'];
 
   /**
    * A field storage to use in this test class.
@@ -39,11 +39,11 @@ class EmailFieldTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalLogin($this->drupalCreateUser(array(
+    $this->drupalLogin($this->drupalCreateUser([
       'view test entity',
       'administer entity_test content',
       'administer content types',
-    )));
+    ]));
   }
 
   /**
@@ -52,11 +52,11 @@ protected function setUp() {
   function testEmailField() {
     // Create a field with settings to validate.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'email',
-    ));
+    ]);
     $this->fieldStorage->save();
     $this->field = FieldConfig::create([
       'field_storage' => $this->fieldStorage,
@@ -66,18 +66,18 @@ function testEmailField() {
 
     // Create a form display for the default form mode.
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'email_default',
-        'settings' => array(
+        'settings' => [
           'placeholder' => 'example@example.com',
-        ),
-      ))
+        ],
+      ])
       ->save();
     // Create a display for the full view mode.
     entity_get_display('entity_test', 'entity_test', 'full')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'email_mailto',
-      ))
+      ])
       ->save();
 
     // Display creation form.
@@ -87,13 +87,13 @@ function testEmailField() {
 
     // Submit a valid email address and ensure it is accepted.
     $value = 'test@example.com';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
     $this->assertRaw($value);
 
     // Verify that a mailto link is displayed.
diff --git a/core/modules/field/src/Tests/EntityReference/EntityReferenceAdminTest.php b/core/modules/field/src/Tests/EntityReference/EntityReferenceAdminTest.php
index 3803029d773af09ba67e944e97aa20d3377e5c06..fa68cb61509fe71a40052aacbdf779b18e0f80f4 100644
--- a/core/modules/field/src/Tests/EntityReference/EntityReferenceAdminTest.php
+++ b/core/modules/field/src/Tests/EntityReference/EntityReferenceAdminTest.php
@@ -46,18 +46,18 @@ protected function setUp() {
 
     // Create a content type, with underscores.
     $type_name = strtolower($this->randomMachineName(8)) . '_test';
-    $type = $this->drupalCreateContentType(array('name' => $type_name, 'type' => $type_name));
+    $type = $this->drupalCreateContentType(['name' => $type_name, 'type' => $type_name]);
     $this->type = $type->id();
 
     // Create test user.
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'access content',
       'administer node fields',
       'administer node display',
       'administer views',
       'create ' . $type_name . ' content',
       'edit own ' . $type_name . ' content',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
   }
 
@@ -74,11 +74,11 @@ public function testFieldAdminHandler() {
     $this->assertOption('edit-new-storage-type', 'field_ui:entity_reference:node');
     $this->assertOption('edit-new-storage-type', 'field_ui:entity_reference:user');
 
-    $this->drupalPostForm(NULL, array(
+    $this->drupalPostForm(NULL, [
       'label' => 'Test label',
       'field_name' => 'test',
       'new_storage_type' => 'entity_reference',
-    ), t('Save and continue'));
+    ], t('Save and continue'));
 
     // Node should be selected by default.
     $this->assertFieldByName('settings[target_type]', 'node');
@@ -87,7 +87,7 @@ public function testFieldAdminHandler() {
     $this->assertFieldSelectOptions('settings[target_type]', array_keys(\Drupal::entityManager()->getDefinitions()));
 
     // Second step: 'Field settings' form.
-    $this->drupalPostForm(NULL, array(), t('Save field settings'));
+    $this->drupalPostForm(NULL, [], t('Save field settings'));
 
     // The base handler should be selected by default.
     $this->assertFieldByName('settings[handler]', 'default:node');
@@ -106,7 +106,7 @@ public function testFieldAdminHandler() {
     $this->assertFieldByName('settings[handler_settings][sort][field]', '_none');
     $this->assertNoFieldByName('settings[handler_settings][sort][direction]');
     // Option 1: sort by field.
-    $this->drupalPostAjaxForm(NULL, array('settings[handler_settings][sort][field]' => 'nid'), 'settings[handler_settings][sort][field]');
+    $this->drupalPostAjaxForm(NULL, ['settings[handler_settings][sort][field]' => 'nid'], 'settings[handler_settings][sort][field]');
     $this->assertFieldByName('settings[handler_settings][sort][direction]', 'ASC');
 
     // Test that a non-translatable base field is a sort option.
@@ -117,14 +117,14 @@ public function testFieldAdminHandler() {
     $this->assertFieldByXPath("//select[@name='settings[handler_settings][sort][field]']/option[@value='body.value']");
 
     // Set back to no sort.
-    $this->drupalPostAjaxForm(NULL, array('settings[handler_settings][sort][field]' => '_none'), 'settings[handler_settings][sort][field]');
+    $this->drupalPostAjaxForm(NULL, ['settings[handler_settings][sort][field]' => '_none'], 'settings[handler_settings][sort][field]');
     $this->assertNoFieldByName('settings[handler_settings][sort][direction]');
 
     // Third step: confirm.
-    $this->drupalPostForm(NULL, array(
+    $this->drupalPostForm(NULL, [
       'required' => '1',
       'settings[handler_settings][target_bundles][' . key($bundles) . ']' => key($bundles),
-    ), t('Save settings'));
+    ], t('Save settings'));
 
     // Check that the field appears in the overview form.
     $this->assertFieldByXPath('//table[@id="field-overview"]//tr[@id="field-test"]/td[1]', 'Test label', 'Field was created and appears in the overview page.');
@@ -133,14 +133,14 @@ public function testFieldAdminHandler() {
     // field is required.
     // The first 'Edit' link is for the Body field.
     $this->clickLink(t('Edit'), 1);
-    $this->drupalPostForm(NULL, array(), t('Save settings'));
+    $this->drupalPostForm(NULL, [], t('Save settings'));
 
     // Switch the target type to 'taxonomy_term' and check that the settings
     // specific to its selection handler are displayed.
     $field_name = 'node.' . $this->type . '.field_test';
-    $edit = array(
+    $edit = [
       'settings[target_type]' => 'taxonomy_term',
-    );
+    ];
     $this->drupalPostForm($bundle_path . '/fields/' . $field_name . '/storage', $edit, t('Save field settings'));
     $this->drupalGet($bundle_path . '/fields/' . $field_name);
     $this->assertFieldByName('settings[handler_settings][auto_create]');
@@ -148,63 +148,63 @@ public function testFieldAdminHandler() {
     // Switch the target type to 'user' and check that the settings specific to
     // its selection handler are displayed.
     $field_name = 'node.' . $this->type . '.field_test';
-    $edit = array(
+    $edit = [
       'settings[target_type]' => 'user',
-    );
+    ];
     $this->drupalPostForm($bundle_path . '/fields/' . $field_name . '/storage', $edit, t('Save field settings'));
     $this->drupalGet($bundle_path . '/fields/' . $field_name);
     $this->assertFieldByName('settings[handler_settings][filter][type]', '_none');
 
     // Switch the target type to 'node'.
     $field_name = 'node.' . $this->type . '.field_test';
-    $edit = array(
+    $edit = [
       'settings[target_type]' => 'node',
-    );
+    ];
     $this->drupalPostForm($bundle_path . '/fields/' . $field_name . '/storage', $edit, t('Save field settings'));
 
     // Try to select the views handler.
-    $edit = array(
+    $edit = [
       'settings[handler]' => 'views',
-    );
+    ];
     $this->drupalPostAjaxForm($bundle_path . '/fields/' . $field_name, $edit, 'settings[handler]');
-    $this->assertRaw(t('No eligible views were found. <a href=":create">Create a view</a> with an <em>Entity Reference</em> display, or add such a display to an <a href=":existing">existing view</a>.', array(
+    $this->assertRaw(t('No eligible views were found. <a href=":create">Create a view</a> with an <em>Entity Reference</em> display, or add such a display to an <a href=":existing">existing view</a>.', [
       ':create' => \Drupal::url('views_ui.add'),
       ':existing' => \Drupal::url('entity.view.collection'),
-    )));
+    ]));
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
     // If no eligible view is available we should see a message.
     $this->assertText('The views entity selection mode requires a view.');
 
     // Enable the entity_reference_test module which creates an eligible view.
-    $this->container->get('module_installer')->install(array('entity_reference_test'));
+    $this->container->get('module_installer')->install(['entity_reference_test']);
     $this->resetAll();
     $this->drupalGet($bundle_path . '/fields/' . $field_name);
     $this->drupalPostAjaxForm($bundle_path . '/fields/' . $field_name, $edit, 'settings[handler]');
-    $edit = array(
+    $edit = [
       'settings[handler_settings][view][view_and_display]' => 'test_entity_reference:entity_reference_1',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
     $this->assertResponse(200);
 
     // Switch the target type to 'entity_test'.
-    $edit = array(
+    $edit = [
       'settings[target_type]' => 'entity_test',
-    );
+    ];
     $this->drupalPostForm($bundle_path . '/fields/' . $field_name . '/storage', $edit, t('Save field settings'));
     $this->drupalGet($bundle_path . '/fields/' . $field_name);
-    $edit = array(
+    $edit = [
       'settings[handler]' => 'views',
-    );
+    ];
     $this->drupalPostAjaxForm($bundle_path . '/fields/' . $field_name, $edit, 'settings[handler]');
-    $edit = array(
+    $edit = [
       'required' => FALSE,
       'settings[handler_settings][view][view_and_display]' => 'test_entity_reference_entity_test:entity_reference_1',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
     $this->assertResponse(200);
 
     // Create a new view and display it as a entity reference.
-    $edit = array(
+    $edit = [
       'id' => 'node_test_view',
       'label' => 'Node Test View',
       'show[wizard_key]' => 'node',
@@ -214,13 +214,13 @@ public function testFieldAdminHandler() {
       'page[path]' => 'test/node/view',
       'page[style][style_plugin]' => 'default',
       'page[style][row_plugin]' => 'fields',
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/add', $edit, t('Save and edit'));
-    $this->drupalPostForm(NULL, array(), t('Duplicate as Entity Reference'));
+    $this->drupalPostForm(NULL, [], t('Duplicate as Entity Reference'));
     $this->clickLink(t('Settings'));
-    $edit = array(
+    $edit = [
       'style_options[search_fields][title]' => 'title',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply'));
 
     // Set sort to NID ascending.
@@ -230,33 +230,33 @@ public function testFieldAdminHandler() {
     $this->drupalPostForm('admin/structure/views/nojs/add-handler/node_test_view/entity_reference_1/sort', $edit, t('Add and configure sort criteria'));
     $this->drupalPostForm(NULL, NULL, t('Apply'));
 
-    $this->drupalPostForm('admin/structure/views/view/node_test_view/edit/entity_reference_1', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/views/view/node_test_view/edit/entity_reference_1', [], t('Save'));
     $this->clickLink(t('Settings'));
 
     // Create a test entity reference field.
     $field_name = 'test_entity_ref_field';
-    $edit = array(
+    $edit = [
       'new_storage_type' => 'field_ui:entity_reference:node',
       'label' => 'Test Entity Reference Field',
       'field_name' => $field_name,
-    );
+    ];
     $this->drupalPostForm($bundle_path . '/fields/add-field', $edit, t('Save and continue'));
 
     // Set to unlimited.
-    $edit = array(
+    $edit = [
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save field settings'));
 
     // Add the view to the test field.
-    $edit = array(
+    $edit = [
       'settings[handler]' => 'views',
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, 'settings[handler]');
-    $edit = array(
+    $edit = [
       'required' => FALSE,
       'settings[handler_settings][view][view_and_display]' => 'node_test_view:entity_reference_1',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
 
     // Create nodes.
@@ -275,34 +275,34 @@ public function testFieldAdminHandler() {
     $this->drupalGet('node/add/' . $this->type);
     $result = $this->xpath('//input[@name="field_test_entity_ref_field[0][target_id]" and contains(@data-autocomplete-path, "/entity_reference_autocomplete/node/views/")]');
     $target_url = $this->getAbsoluteUrl($result[0]['data-autocomplete-path']);
-    $this->drupalGet($target_url, array('query' => array('q' => 'Foo')));
+    $this->drupalGet($target_url, ['query' => ['q' => 'Foo']]);
     $this->assertRaw($node1->getTitle() . ' (' . $node1->id() . ')');
     $this->assertRaw($node2->getTitle() . ' (' . $node2->id() . ')');
 
     // Try to add a new node, fill the entity reference field and submit the
     // form.
     $this->drupalPostForm('node/add/' . $this->type, [], t('Add another item'));
-    $edit = array(
+    $edit = [
       'title[0][value]' => 'Example',
       'field_test_entity_ref_field[0][target_id]' => 'Foo Node (' . $node1->id() . ')',
       'field_test_entity_ref_field[1][target_id]' => 'Foo Node (' . $node2->id() . ')',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertResponse(200);
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => 'Example',
       'field_test_entity_ref_field[0][target_id]' => 'Test'
-    );
+    ];
     $this->drupalPostForm('node/add/' . $this->type, $edit, t('Save'));
 
     // Assert that entity reference autocomplete field is validated.
     $this->assertText(t('There are no entities matching "@entity"', ['@entity' => 'Test']));
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => 'Test',
       'field_test_entity_ref_field[0][target_id]' => $node1->getTitle()
-    );
+    ];
     $this->drupalPostForm('node/add/' . $this->type, $edit, t('Save'));
 
     // Assert the results multiple times to avoid sorting problem of nodes with
@@ -312,15 +312,15 @@ public function testFieldAdminHandler() {
     $this->assertText(t("@node2", ['@node2' => $node2->getTitle() . ' (' . $node2->id() . ')']));
     $this->assertText(t('Specify the one you want by appending the id in parentheses, like "@example".', ['@example' => $node2->getTitle() . ' (' . $node2->id() . ')']));
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => 'Test',
       'field_test_entity_ref_field[0][target_id]' => $node1->getTitle() . ' (' . $node1->id() . ')'
-    );
+    ];
     $this->drupalPostForm('node/add/' . $this->type, $edit, t('Save'));
     $this->assertLink($node1->getTitle());
 
     // Tests adding default values to autocomplete widgets.
-    Vocabulary::create(array('vid' => 'tags', 'name' => 'tags'))->save();
+    Vocabulary::create(['vid' => 'tags', 'name' => 'tags'])->save();
     $taxonomy_term_field_name = $this->createEntityReferenceField('taxonomy_term', ['tags']);
     $field_path = 'node.' . $this->type . '.field_' . $taxonomy_term_field_name;
     $this->drupalGet($bundle_path . '/fields/' . $field_path . '/storage');
@@ -351,7 +351,7 @@ public function testFieldAdminHandler() {
    */
   public function testAvailableFormatters() {
     // Create a new vocabulary.
-    Vocabulary::create(array('vid' => 'tags', 'name' => 'tags'))->save();
+    Vocabulary::create(['vid' => 'tags', 'name' => 'tags'])->save();
 
     // Create entity reference field with taxonomy term as a target.
     $taxonomy_term_field_name = $this->createEntityReferenceField('taxonomy_term', ['tags']);
@@ -370,38 +370,38 @@ public function testAvailableFormatters() {
 
     // Check for Taxonomy Term select box values.
     // Test if Taxonomy Term Entity Reference Field has the correct formatters.
-    $this->assertFieldSelectOptions('fields[field_' . $taxonomy_term_field_name . '][type]', array(
+    $this->assertFieldSelectOptions('fields[field_' . $taxonomy_term_field_name . '][type]', [
       'entity_reference_label',
       'entity_reference_entity_id',
       'entity_reference_rss_category',
       'entity_reference_entity_view',
-    ));
+    ]);
 
     // Test if User Reference Field has the correct formatters.
     // Author should be available for this field.
     // RSS Category should not be available for this field.
-    $this->assertFieldSelectOptions('fields[field_' . $user_field_name . '][type]', array(
+    $this->assertFieldSelectOptions('fields[field_' . $user_field_name . '][type]', [
       'author',
       'entity_reference_entity_id',
       'entity_reference_entity_view',
       'entity_reference_label',
-    ));
+    ]);
 
     // Test if Node Entity Reference Field has the correct formatters.
     // RSS Category should not be available for this field.
-    $this->assertFieldSelectOptions('fields[field_' . $node_field_name . '][type]', array(
+    $this->assertFieldSelectOptions('fields[field_' . $node_field_name . '][type]', [
       'entity_reference_label',
       'entity_reference_entity_id',
       'entity_reference_entity_view',
-    ));
+    ]);
 
     // Test if Date Format Reference Field has the correct formatters.
     // RSS Category & Entity View should not be available for this field.
     // This could be any field without a ViewBuilder.
-    $this->assertFieldSelectOptions('fields[field_' . $date_format_field_name . '][type]', array(
+    $this->assertFieldSelectOptions('fields[field_' . $date_format_field_name . '][type]', [
       'entity_reference_label',
       'entity_reference_entity_id',
-    ));
+    ]);
   }
 
   /**
@@ -483,7 +483,7 @@ protected function createEntityReferenceField($target_type, $bundles = []) {
     // Generate a random field name, must be only lowercase characters.
     $field_name = strtolower($this->randomMachineName());
 
-    $storage_edit = $field_edit = array();
+    $storage_edit = $field_edit = [];
     $storage_edit['settings[target_type]'] = $target_type;
     foreach ($bundles as $bundle) {
       $field_edit['settings[handler_settings][target_bundles][' . $bundle . ']'] = TRUE;
@@ -507,7 +507,7 @@ protected function createEntityReferenceField($target_type, $bundles = []) {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertFieldSelectOptions($name, array $expected_options) {
-    $xpath = $this->buildXPathQuery('//select[@name=:name]', array(':name' => $name));
+    $xpath = $this->buildXPathQuery('//select[@name=:name]', [':name' => $name]);
     $fields = $this->xpath($xpath);
     if ($fields) {
       $field = $fields[0];
@@ -533,7 +533,7 @@ protected function assertFieldSelectOptions($name, array $expected_options) {
    *   An array of option values as strings.
    */
   protected function getAllOptionsList(\SimpleXMLElement $element) {
-    $options = array();
+    $options = [];
     // Add all options items.
     foreach ($element->option as $option) {
       $options[] = (string) $option['value'];
diff --git a/core/modules/field/src/Tests/EntityReference/EntityReferenceFileUploadTest.php b/core/modules/field/src/Tests/EntityReference/EntityReferenceFileUploadTest.php
index 6aef0f82835cc4cd3034ef54cda03c107d644149..19575840f29e343c425075879c22151b9e9e20c8 100644
--- a/core/modules/field/src/Tests/EntityReference/EntityReferenceFileUploadTest.php
+++ b/core/modules/field/src/Tests/EntityReference/EntityReferenceFileUploadTest.php
@@ -14,7 +14,7 @@
  */
 class EntityReferenceFileUploadTest extends WebTestBase {
 
-  public static $modules = array('entity_reference', 'node', 'file');
+  public static $modules = ['entity_reference', 'node', 'file'];
 
   /**
    * The name of a content type that will reference $referencedType.
@@ -46,19 +46,19 @@ protected function setUp() {
 
     $referenced = $this->drupalCreateContentType();
     $this->referencedType = $referenced->id();
-    $this->nodeId = $this->drupalCreateNode(array('type' => $referenced->id()))->id();
+    $this->nodeId = $this->drupalCreateNode(['type' => $referenced->id()])->id();
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'test_field',
       'entity_type' => 'node',
       'translatable' => FALSE,
-      'entity_types' => array(),
-      'settings' => array(
+      'entity_types' => [],
+      'settings' => [
         'target_type' => 'node',
-      ),
+      ],
       'type' => 'entity_reference',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
 
     FieldConfig::create([
       'label' => 'Entity reference field',
@@ -66,25 +66,25 @@ protected function setUp() {
       'entity_type' => 'node',
       'required' => TRUE,
       'bundle' => $referencing->id(),
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
-        'handler_settings' => array(
+        'handler_settings' => [
           // Reference a single vocabulary.
-          'target_bundles' => array(
+          'target_bundles' => [
             $referenced->id(),
-          ),
-        ),
-      ),
+          ],
+        ],
+      ],
     ])->save();
 
 
     // Create a file field.
     $file_field_name = 'file_field';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $file_field_name,
       'entity_type' => 'node',
       'type' => 'file'
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'entity_type' => 'node',
@@ -98,12 +98,12 @@ protected function setUp() {
       ->setComponent($file_field_name)
       ->save();
     entity_get_form_display('node', $referencing->id(), 'default')
-      ->setComponent('test_field', array(
+      ->setComponent('test_field', [
         'type' => 'entity_reference_autocomplete',
-      ))
-      ->setComponent($file_field_name, array(
+      ])
+      ->setComponent($file_field_name, [
          'type' => 'file_generic',
-      ))
+      ])
       ->save();
   }
 
@@ -111,17 +111,17 @@ protected function setUp() {
    * Tests that the autocomplete input element does not cause ajax fatal.
    */
   public function testFileUpload() {
-    $user1 = $this->drupalCreateUser(array('access content', "create $this->referencingType content"));
+    $user1 = $this->drupalCreateUser(['access content', "create $this->referencingType content"]);
     $this->drupalLogin($user1);
 
     $test_file = current($this->drupalGetTestFiles('text'));
     $edit['files[file_field_0]'] = drupal_realpath($test_file->uri);
     $this->drupalPostForm('node/add/' . $this->referencingType, $edit, 'Upload');
     $this->assertResponse(200);
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
       'test_field[0][target_id]' => $this->nodeId,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Save');
     $this->assertResponse(200);
   }
diff --git a/core/modules/field/src/Tests/EntityReference/EntityReferenceTestTrait.php b/core/modules/field/src/Tests/EntityReference/EntityReferenceTestTrait.php
index 13e28da70fab1d125e7a561740291512d2cbd437..568cd4d5fcbd5019da951de8e3f7923d0b3a8f27 100644
--- a/core/modules/field/src/Tests/EntityReference/EntityReferenceTestTrait.php
+++ b/core/modules/field/src/Tests/EntityReference/EntityReferenceTestTrait.php
@@ -34,30 +34,30 @@ trait EntityReferenceTestTrait {
    *
    * @see \Drupal\Core\Entity\Plugin\EntityReferenceSelection\SelectionBase::buildConfigurationForm()
    */
-  protected function createEntityReferenceField($entity_type, $bundle, $field_name, $field_label, $target_entity_type, $selection_handler = 'default', $selection_handler_settings = array(), $cardinality = 1) {
+  protected function createEntityReferenceField($entity_type, $bundle, $field_name, $field_label, $target_entity_type, $selection_handler = 'default', $selection_handler_settings = [], $cardinality = 1) {
     // Look for or add the specified field to the requested entity bundle.
     if (!FieldStorageConfig::loadByName($entity_type, $field_name)) {
-      FieldStorageConfig::create(array(
+      FieldStorageConfig::create([
         'field_name' => $field_name,
         'type' => 'entity_reference',
         'entity_type' => $entity_type,
         'cardinality' => $cardinality,
-        'settings' => array(
+        'settings' => [
           'target_type' => $target_entity_type,
-        ),
-      ))->save();
+        ],
+      ])->save();
     }
     if (!FieldConfig::loadByName($entity_type, $bundle, $field_name)) {
-      FieldConfig::create(array(
+      FieldConfig::create([
         'field_name' => $field_name,
         'entity_type' => $entity_type,
         'bundle' => $bundle,
         'label' => $field_label,
-        'settings' => array(
+        'settings' => [
           'handler' => $selection_handler,
           'handler_settings' => $selection_handler_settings,
-        ),
-      ))->save();
+        ],
+      ])->save();
     }
   }
 
diff --git a/core/modules/field/src/Tests/FieldDefaultValueCallbackTest.php b/core/modules/field/src/Tests/FieldDefaultValueCallbackTest.php
index e7f5a4c5448a3c6045ccc6998a97c42070433cf4..b6926ce7e29dfa05896e2263e402589e3093383f 100644
--- a/core/modules/field/src/Tests/FieldDefaultValueCallbackTest.php
+++ b/core/modules/field/src/Tests/FieldDefaultValueCallbackTest.php
@@ -18,7 +18,7 @@ class FieldDefaultValueCallbackTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_test', 'field_ui');
+  public static $modules = ['node', 'field_test', 'field_ui'];
 
   /**
    * The field name.
@@ -37,10 +37,10 @@ protected function setUp() {
 
     // Create Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array(
+      $this->drupalCreateContentType([
         'type' => 'article',
         'name' => 'Article',
-      ));
+      ]);
     }
 
   }
diff --git a/core/modules/field/src/Tests/FieldImportDeleteUninstallUiTest.php b/core/modules/field/src/Tests/FieldImportDeleteUninstallUiTest.php
index e69e04f8c4969fc15d951bab07211578e0035c6a..e35308603f99a14f303f594db2e58475fbdfce03 100644
--- a/core/modules/field/src/Tests/FieldImportDeleteUninstallUiTest.php
+++ b/core/modules/field/src/Tests/FieldImportDeleteUninstallUiTest.php
@@ -22,12 +22,12 @@ class FieldImportDeleteUninstallUiTest extends FieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'telephone', 'config', 'filter', 'datetime');
+  public static $modules = ['entity_test', 'telephone', 'config', 'filter', 'datetime'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalLogin($this->drupalCreateUser(array('synchronize configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['synchronize configuration']));
   }
 
   /**
@@ -35,11 +35,11 @@ protected function setUp() {
    */
   public function testImportDeleteUninstall() {
     // Create a telephone field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_tel',
       'entity_type' => 'entity_test',
       'type' => 'telephone',
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -47,11 +47,11 @@ public function testImportDeleteUninstall() {
     ])->save();
 
     // Create a text field.
-    $date_field_storage = FieldStorageConfig::create(array(
+    $date_field_storage = FieldStorageConfig::create([
       'field_name' => 'field_date',
       'entity_type' => 'entity_test',
       'type' => 'datetime',
-    ));
+    ]);
     $date_field_storage->save();
     FieldConfig::create([
       'field_storage' => $date_field_storage,
@@ -104,12 +104,12 @@ public function testImportDeleteUninstall() {
 
     // This will purge all the data, delete the field and uninstall the
     // Telephone and Text modules.
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
     $this->assertNoText('Field data will be deleted by this synchronization.');
     $this->rebuildContainer();
     $this->assertFalse(\Drupal::moduleHandler()->moduleExists('telephone'));
     $this->assertFalse(\Drupal::entityManager()->loadEntityByUuid('field_storage_config', $field_storage->uuid()), 'The telephone field has been deleted by the configuration synchronization');
-    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: array();
+    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: [];
     $this->assertFalse(isset($deleted_storages[$field_storage->uuid()]), 'Telephone field has been completed removed from the system.');
     $this->assertFalse(isset($deleted_storages[$field_storage->uuid()]), 'Text field has been completed removed from the system.');
   }
diff --git a/core/modules/field/src/Tests/FieldTestBase.php b/core/modules/field/src/Tests/FieldTestBase.php
index 30c80dfafddb7e7fb4b2090004bb0e78f8e64acd..ce4161bc9b417746b431a30a751d3ca3665911e3 100644
--- a/core/modules/field/src/Tests/FieldTestBase.php
+++ b/core/modules/field/src/Tests/FieldTestBase.php
@@ -23,7 +23,7 @@ abstract class FieldTestBase extends WebTestBase {
    *   An array of random values, in the format expected for field values.
    */
   function _generateTestFieldValues($cardinality) {
-    $values = array();
+    $values = [];
     for ($i = 0; $i < $cardinality; $i++) {
       // field_test fields treat 0 as 'empty value'.
       $values[$i]['value'] = mt_rand(1, 127);
@@ -61,7 +61,7 @@ function assertFieldValues(EntityInterface $entity, $field_name, $expected_value
     $values = $field->getValue();
     $this->assertEqual(count($values), count($expected_values), 'Expected number of values were saved.');
     foreach ($expected_values as $key => $value) {
-      $this->assertEqual($values[$key][$column], $value, format_string('Value @value was saved correctly.', array('@value' => $value)));
+      $this->assertEqual($values[$key][$column], $value, format_string('Value @value was saved correctly.', ['@value' => $value]));
     }
   }
 
diff --git a/core/modules/field/src/Tests/FormTest.php b/core/modules/field/src/Tests/FormTest.php
index 16625a9ab4f2bfd0173eea05608ef85656895f29..77cc27441da2d15b1ee60e8a11b37e10b553837d 100644
--- a/core/modules/field/src/Tests/FormTest.php
+++ b/core/modules/field/src/Tests/FormTest.php
@@ -25,7 +25,7 @@ class FormTest extends FieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_test', 'options', 'entity_test', 'locale');
+  public static $modules = ['node', 'field_test', 'options', 'entity_test', 'locale'];
 
   /**
    * An array of values defining a field single.
@@ -58,37 +58,37 @@ class FormTest extends FieldTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $web_user = $this->drupalCreateUser(array('view test entity', 'administer entity_test content'));
+    $web_user = $this->drupalCreateUser(['view test entity', 'administer entity_test content']);
     $this->drupalLogin($web_user);
 
-    $this->fieldStorageSingle = array(
+    $this->fieldStorageSingle = [
       'field_name' => 'field_single',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-    );
-    $this->fieldStorageMultiple = array(
+    ];
+    $this->fieldStorageMultiple = [
       'field_name' => 'field_multiple',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
       'cardinality' => 4,
-    );
-    $this->fieldStorageUnlimited = array(
+    ];
+    $this->fieldStorageUnlimited = [
       'field_name' => 'field_unlimited',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    );
+    ];
 
-    $this->field = array(
+    $this->field = [
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
       'label' => $this->randomMachineName() . '_label',
       'description' => '[site:name]_description',
       'weight' => mt_rand(0, 127),
-      'settings' => array(
+      'settings' => [
         'test_field_setting' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
   }
 
   function testFieldFormSingle() {
@@ -115,22 +115,22 @@ function testFieldFormSingle() {
     $this->assertNoText('From hook_field_widget_form_alter(): Default form is true.', 'Not default value form in hook_field_widget_form_alter().');
 
     // Submit with invalid value (field-level validation).
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => -1
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('%name does not accept the value -1.', array('%name' => $this->field['label'])), 'Field validation fails with invalid input.');
+    $this->assertRaw(t('%name does not accept the value -1.', ['%name' => $this->field['label']]), 'Field validation fails with invalid input.');
     // TODO : check that the correct field is flagged for error.
 
     // Create an entity
     $value = mt_rand(1, 127);
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
     $entity = EntityTest::load($id);
     $this->assertEqual($entity->{$field_name}->value, $value, 'Field value was saved');
 
@@ -141,23 +141,23 @@ function testFieldFormSingle() {
 
     // Update the entity.
     $value = mt_rand(1, 127);
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('entity_test @id has been updated.', array('@id' => $id)), 'Entity was updated');
-    $this->container->get('entity.manager')->getStorage('entity_test')->resetCache(array($id));
+    $this->assertText(t('entity_test @id has been updated.', ['@id' => $id]), 'Entity was updated');
+    $this->container->get('entity.manager')->getStorage('entity_test')->resetCache([$id]);
     $entity = EntityTest::load($id);
     $this->assertEqual($entity->{$field_name}->value, $value, 'Field value was updated');
 
     // Empty the field.
     $value = '';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value
-    );
+    ];
     $this->drupalPostForm('entity_test/manage/' . $id . '/edit', $edit, t('Save'));
-    $this->assertText(t('entity_test @id has been updated.', array('@id' => $id)), 'Entity was updated');
-    $this->container->get('entity.manager')->getStorage('entity_test')->resetCache(array($id));
+    $this->assertText(t('entity_test @id has been updated.', ['@id' => $id]), 'Entity was updated');
+    $this->container->get('entity.manager')->getStorage('entity_test')->resetCache([$id]);
     $entity = EntityTest::load($id);
     $this->assertTrue($entity->{$field_name}->isEmpty(), 'Field was emptied');
   }
@@ -170,7 +170,7 @@ function testFieldFormDefaultValue() {
     $field_name = $field_storage['field_name'];
     $this->field['field_name'] = $field_name;
     $default = rand(1, 127);
-    $this->field['default_value'] = array(array('value' => $default));
+    $this->field['default_value'] = [['value' => $default]];
     FieldStorageConfig::create($field_storage)->save();
     FieldConfig::create($this->field)->save();
     entity_get_form_display($this->field['entity_type'], $this->field['bundle'], 'default')
@@ -183,13 +183,13 @@ function testFieldFormDefaultValue() {
     $this->assertFieldByXpath("//input[@name='{$field_name}[0][value]' and @value='$default']");
 
     // Try to submit an empty value.
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => '',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created.');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created.');
     $entity = EntityTest::load($id);
     $this->assertTrue($entity->{$field_name}->isEmpty(), 'Field is now empty.');
   }
@@ -206,29 +206,29 @@ function testFieldFormSingleRequired() {
       ->save();
 
     // Submit with missing required value.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('entity_test/add', $edit, t('Save'));
-    $this->assertRaw(t('@name field is required.', array('@name' => $this->field['label'])), 'Required field with no value fails validation');
+    $this->assertRaw(t('@name field is required.', ['@name' => $this->field['label']]), 'Required field with no value fails validation');
 
     // Create an entity
     $value = mt_rand(1, 127);
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
     $entity = EntityTest::load($id);
     $this->assertEqual($entity->{$field_name}->value, $value, 'Field value was saved');
 
     // Edit with missing required value.
     $value = '';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm('entity_test/manage/' . $id . '/edit', $edit, t('Save'));
-    $this->assertRaw(t('@name field is required.', array('@name' => $this->field['label'])), 'Required field with no value fails validation');
+    $this->assertRaw(t('@name field is required.', ['@name' => $this->field['label']]), 'Required field with no value fails validation');
   }
 
   function testFieldFormUnlimited() {
@@ -251,20 +251,20 @@ function testFieldFormUnlimited() {
     $this->assertTrue(isset($elements[0]), t('aria-describedby attribute is properly placed on multiple value widgets.'));
 
     // Press 'add more' button -> 2 widgets.
-    $this->drupalPostForm(NULL, array(), t('Add another item'));
+    $this->drupalPostForm(NULL, [], t('Add another item'));
     $this->assertFieldByName("{$field_name}[0][value]", '', 'Widget 1 is displayed');
     $this->assertFieldByName("{$field_name}[1][value]", '', 'New widget is displayed');
     $this->assertNoField("{$field_name}[2][value]", 'No extraneous widget is displayed');
     // TODO : check that non-field inputs are preserved ('title'), etc.
 
     // Yet another time so that we can play with more values -> 3 widgets.
-    $this->drupalPostForm(NULL, array(), t('Add another item'));
+    $this->drupalPostForm(NULL, [], t('Add another item'));
 
     // Prepare values and weights.
     $count = 3;
     $delta_range = $count - 1;
-    $values = $weights = $pattern = $expected_values = array();
-    $edit = array();
+    $values = $weights = $pattern = $expected_values = [];
+    $edit = [];
     for ($delta = 0; $delta <= $delta_range; $delta++) {
       // Assign unique random values and weights.
       do {
@@ -299,7 +299,7 @@ function testFieldFormUnlimited() {
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
     $entity = EntityTest::load($id);
     ksort($field_values);
     $field_values = array_values($field_values);
@@ -330,11 +330,11 @@ public function testFieldFormUnlimitedRequired() {
     // Display creation form -> 1 widget.
     $this->drupalGet('entity_test/add');
     // Check that the Required symbol is present for the multifield label.
-    $element = $this->xpath('//h4[contains(@class, "label") and contains(@class, "js-form-required") and contains(text(), :value)]', array(':value' => $this->field['label']));
+    $element = $this->xpath('//h4[contains(@class, "label") and contains(@class, "js-form-required") and contains(text(), :value)]', [':value' => $this->field['label']]);
     $this->assertTrue(isset($element[0]), 'Required symbol added field label.');
     // Check that the label of the field input is visually hidden and contains
     // the field title and an indication of the delta for a11y.
-    $element = $this->xpath('//label[@for=:for and contains(@class, "visually-hidden") and contains(text(), :value)]', array(':for' => 'edit-field-unlimited-0-value', ':value' => $this->field['label'] . ' (value 1)'));
+    $element = $this->xpath('//label[@for=:for and contains(@class, "visually-hidden") and contains(text(), :value)]', [':for' => 'edit-field-unlimited-0-value', ':value' => $this->field['label'] . ' (value 1)']);
     $this->assertTrue(isset($element[0]), 'Required symbol not added for field input.');
   }
 
@@ -353,32 +353,32 @@ function testFieldFormMultivalueWithRequiredRadio() {
       ->save();
 
     // Add a required radio field.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'required_radio_test',
       'entity_type' => 'entity_test',
       'type' => 'list_string',
-      'settings' => array(
-        'allowed_values' => array('yes' => 'yes', 'no' => 'no'),
-      ),
-    ))->save();
-    $field = array(
+      'settings' => [
+        'allowed_values' => ['yes' => 'yes', 'no' => 'no'],
+      ],
+    ])->save();
+    $field = [
       'field_name' => 'required_radio_test',
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
       'required' => TRUE,
-    );
+    ];
     FieldConfig::create($field)->save();
     entity_get_form_display($field['entity_type'], $field['bundle'], 'default')
-      ->setComponent($field['field_name'], array(
+      ->setComponent($field['field_name'], [
         'type' => 'options_buttons',
-      ))
+      ])
       ->save();
 
     // Display creation form.
     $this->drupalGet('entity_test/add');
 
     // Press the 'Add more' button.
-    $this->drupalPostForm(NULL, array(), t('Add another item'));
+    $this->drupalPostForm(NULL, [], t('Add another item'));
 
     // Verify that no error is thrown by the radio element.
     $this->assertNoFieldByXpath('//div[contains(@class, "error")]', FALSE, 'No error message is displayed.');
@@ -405,13 +405,13 @@ function testFieldFormJSAddMore() {
     // Press 'add more' button a couple times -> 3 widgets.
     // drupalPostAjaxForm() will not work iteratively, so we add those through
     // non-JS submission.
-    $this->drupalPostForm(NULL, array(), t('Add another item'));
-    $this->drupalPostForm(NULL, array(), t('Add another item'));
+    $this->drupalPostForm(NULL, [], t('Add another item'));
+    $this->drupalPostForm(NULL, [], t('Add another item'));
 
     // Prepare values and weights.
     $count = 3;
     $delta_range = $count - 1;
-    $values = $weights = $pattern = $expected_values = $edit = array();
+    $values = $weights = $pattern = $expected_values = $edit = [];
     for ($delta = 0; $delta <= $delta_range; $delta++) {
       // Assign unique random values and weights.
       do {
@@ -457,9 +457,9 @@ function testFieldFormMultipleWidget() {
     FieldStorageConfig::create($field_storage)->save();
     FieldConfig::create($this->field)->save();
     entity_get_form_display($this->field['entity_type'], $this->field['bundle'], 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'test_field_widget_multiple',
-      ))
+      ])
       ->save();
 
     // Display creation form.
@@ -467,27 +467,27 @@ function testFieldFormMultipleWidget() {
     $this->assertFieldByName($field_name, '', 'Widget is displayed.');
 
     // Create entity with three values.
-    $edit = array(
+    $edit = [
       $field_name => '1, 2, 3',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
 
     // Check that the values were saved.
     $entity_init = EntityTest::load($id);
-    $this->assertFieldValues($entity_init, $field_name, array(1, 2, 3));
+    $this->assertFieldValues($entity_init, $field_name, [1, 2, 3]);
 
     // Display the form, check that the values are correctly filled in.
     $this->drupalGet('entity_test/manage/' . $id . '/edit');
     $this->assertFieldByName($field_name, '1, 2, 3', 'Widget is displayed.');
 
     // Submit the form with more values than the field accepts.
-    $edit = array($field_name => '1, 2, 3, 4, 5');
+    $edit = [$field_name => '1, 2, 3, 4, 5'];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertRaw('this field cannot hold more than 4 values', 'Form validation failed.');
     // Check that the field values were not submitted.
-    $this->assertFieldValues($entity_init, $field_name, array(1, 2, 3));
+    $this->assertFieldValues($entity_init, $field_name, [1, 2, 3]);
   }
 
   /**
@@ -511,18 +511,18 @@ function testFieldFormAccess() {
 
     // Create a field with no edit access. See
     // field_test_entity_field_access().
-    $field_storage_no_access = array(
+    $field_storage_no_access = [
       'field_name' => 'field_no_edit_access',
       'entity_type' => $entity_type,
       'type' => 'test_field',
-    );
+    ];
     $field_name_no_access = $field_storage_no_access['field_name'];
-    $field_no_access = array(
+    $field_no_access = [
       'field_name' => $field_name_no_access,
       'entity_type' => $entity_type,
       'bundle' => $entity_type,
-      'default_value' => array(0 => array('value' => 99)),
-    );
+      'default_value' => [0 => ['value' => 99]],
+    ];
     FieldStorageConfig::create($field_storage_no_access)->save();
     FieldConfig::create($field_no_access)->save();
     entity_get_form_display($field_no_access['entity_type'], $field_no_access['bundle'], 'default')
@@ -533,10 +533,10 @@ function testFieldFormAccess() {
     // apart from #access.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('id' => 0, 'revision_id' => 0));
+      ->create(['id' => 0, 'revision_id' => 0]);
 
     $display = entity_get_form_display($entity_type, $entity_type, 'default');
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $display->buildForm($entity, $form, $form_state);
 
@@ -547,9 +547,9 @@ function testFieldFormAccess() {
     $this->assertNoFieldByName("{$field_name_no_access}[0][value]", '', 'Widget is not displayed if field access is denied.');
 
     // Create entity.
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match("|$entity_type/manage/(\d+)|", $this->url, $match);
     $id = $match[1];
@@ -562,10 +562,10 @@ function testFieldFormAccess() {
     $this->assertEqual($entity->$field_name->value, 1, 'Entered value vas saved for the field with edit access.');
 
     // Create a new revision.
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => 2,
       'revision' => TRUE,
-    );
+    ];
     $this->drupalPostForm($entity_type . '/manage/' . $id . '/edit', $edit, t('Save'));
 
     // Check that the new revision has the expected values.
@@ -591,7 +591,7 @@ function testHiddenField() {
     $field_storage['entity_type'] = $entity_type;
     $field_name = $field_storage['field_name'];
     $this->field['field_name'] = $field_name;
-    $this->field['default_value'] = array(0 => array('value' => 99));
+    $this->field['default_value'] = [0 => ['value' => 99]];
     $this->field['entity_type'] = $entity_type;
     $this->field['bundle'] = $entity_type;
     FieldStorageConfig::create($field_storage)->save();
@@ -606,10 +606,10 @@ function testHiddenField() {
     // Create an entity and test that the default value is assigned correctly to
     // the field that uses the hidden widget.
     $this->assertNoField("{$field_name}[0][value]", 'The field does not appear in the form');
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     preg_match('|' . $entity_type . '/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test_rev @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test_rev @id has been created.', ['@id' => $id]), 'Entity was created');
     $storage = $this->container->get('entity_type.manager')
       ->getStorage($entity_type);
 
@@ -618,12 +618,12 @@ function testHiddenField() {
 
     // Update the field to remove the default value, and switch to the default
     // widget.
-    $this->field->setDefaultValue(array());
+    $this->field->setDefaultValue([]);
     $this->field->save();
     entity_get_form_display($entity_type, $this->field->getTargetBundle(), 'default')
-      ->setComponent($this->field->getName(), array(
+      ->setComponent($this->field->getName(), [
         'type' => 'test_field_widget',
-      ))
+      ])
       ->save();
 
     // Display edit form.
@@ -632,9 +632,9 @@ function testHiddenField() {
 
     // Update the entity.
     $value = mt_rand(1, 127);
-    $edit = array("{$field_name}[0][value]" => $value);
+    $edit = ["{$field_name}[0][value]" => $value];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('entity_test_rev @id has been updated.', array('@id' => $id)), 'Entity was updated');
+    $this->assertText(t('entity_test_rev @id has been updated.', ['@id' => $id]), 'Entity was updated');
     $storage->resetCache([$id]);
     $entity = $storage->load($id);
     $this->assertEqual($entity->{$field_name}->value, $value, 'Field value was updated');
@@ -645,11 +645,11 @@ function testHiddenField() {
       ->save();
 
     // Create a new revision.
-    $edit = array('revision' => TRUE);
+    $edit = ['revision' => TRUE];
     $this->drupalPostForm($entity_type . '/manage/' . $id . '/edit', $edit, t('Save'));
 
     // Check that the expected value has been carried over to the new revision.
-    $storage->resetCache(array($id));
+    $storage->resetCache([$id]);
     $entity = $storage->load($id);
     $this->assertEqual($entity->{$field_name}->value, $value, 'New revision has the expected value for the field with the Hidden widget');
   }
diff --git a/core/modules/field/src/Tests/NestedFormTest.php b/core/modules/field/src/Tests/NestedFormTest.php
index 8b3402d584f85b3c5ab6362f5e3f2590456622b4..530bb20f182cf93100f630cee56b6cb17090b6e4 100644
--- a/core/modules/field/src/Tests/NestedFormTest.php
+++ b/core/modules/field/src/Tests/NestedFormTest.php
@@ -17,36 +17,36 @@ class NestedFormTest extends FieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test', 'entity_test');
+  public static $modules = ['field_test', 'entity_test'];
 
   protected function setUp() {
     parent::setUp();
 
-    $web_user = $this->drupalCreateUser(array('view test entity', 'administer entity_test content'));
+    $web_user = $this->drupalCreateUser(['view test entity', 'administer entity_test content']);
     $this->drupalLogin($web_user);
 
-    $this->fieldStorageSingle = array(
+    $this->fieldStorageSingle = [
       'field_name' => 'field_single',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-    );
-    $this->fieldStorageUnlimited = array(
+    ];
+    $this->fieldStorageUnlimited = [
       'field_name' => 'field_unlimited',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    );
+    ];
 
-    $this->field = array(
+    $this->field = [
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
       'label' => $this->randomMachineName() . '_label',
       'description' => '[site:name]_description',
       'weight' => mt_rand(0, 127),
-      'settings' => array(
+      'settings' => [
         'test_field_setting' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -80,7 +80,7 @@ function testNestedFieldForm() {
     $entity_1->field_unlimited->value = 1;
     $entity_1->save();
 
-    $entity_2 = $storage->create(array('id' => 2));
+    $entity_2 = $storage->create(['id' => 2]);
     $entity_2->enforceIsNew();
     $entity_2->field_single->value = 10;
     $entity_2->field_unlimited->value = 11;
@@ -94,75 +94,75 @@ function testNestedFieldForm() {
     $this->assertFieldByName('entity_2[field_unlimited][0][value]', 11, 'Entity 2: field_unlimited value 0 appears correctly is the form.');
 
     // Submit the form and check that the entities are updated accordingly.
-    $edit = array(
+    $edit = [
       'field_single[0][value]' => 1,
       'field_unlimited[0][value]' => 2,
       'field_unlimited[1][value]' => 3,
       'entity_2[field_single][0][value]' => 11,
       'entity_2[field_unlimited][0][value]' => 12,
       'entity_2[field_unlimited][1][value]' => 13,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $entity_1 = $storage->load(1);
     $entity_2 = $storage->load(2);
-    $this->assertFieldValues($entity_1, 'field_single', array(1));
-    $this->assertFieldValues($entity_1, 'field_unlimited', array(2, 3));
-    $this->assertFieldValues($entity_2, 'field_single', array(11));
-    $this->assertFieldValues($entity_2, 'field_unlimited', array(12, 13));
+    $this->assertFieldValues($entity_1, 'field_single', [1]);
+    $this->assertFieldValues($entity_1, 'field_unlimited', [2, 3]);
+    $this->assertFieldValues($entity_2, 'field_single', [11]);
+    $this->assertFieldValues($entity_2, 'field_unlimited', [12, 13]);
 
     // Submit invalid values and check that errors are reported on the
     // correct widgets.
-    $edit = array(
+    $edit = [
       'field_unlimited[1][value]' => -1,
-    );
+    ];
     $this->drupalPostForm('test-entity/nested/1/2', $edit, t('Save'));
-    $this->assertRaw(t('%label does not accept the value -1', array('%label' => 'Unlimited field')), 'Entity 1: the field validation error was reported.');
-    $error_field = $this->xpath('//input[@id=:id and contains(@class, "error")]', array(':id' => 'edit-field-unlimited-1-value'));
+    $this->assertRaw(t('%label does not accept the value -1', ['%label' => 'Unlimited field']), 'Entity 1: the field validation error was reported.');
+    $error_field = $this->xpath('//input[@id=:id and contains(@class, "error")]', [':id' => 'edit-field-unlimited-1-value']);
     $this->assertTrue($error_field, 'Entity 1: the error was flagged on the correct element.');
-    $edit = array(
+    $edit = [
       'entity_2[field_unlimited][1][value]' => -1,
-    );
+    ];
     $this->drupalPostForm('test-entity/nested/1/2', $edit, t('Save'));
-    $this->assertRaw(t('%label does not accept the value -1', array('%label' => 'Unlimited field')), 'Entity 2: the field validation error was reported.');
-    $error_field = $this->xpath('//input[@id=:id and contains(@class, "error")]', array(':id' => 'edit-entity-2-field-unlimited-1-value'));
+    $this->assertRaw(t('%label does not accept the value -1', ['%label' => 'Unlimited field']), 'Entity 2: the field validation error was reported.');
+    $error_field = $this->xpath('//input[@id=:id and contains(@class, "error")]', [':id' => 'edit-entity-2-field-unlimited-1-value']);
     $this->assertTrue($error_field, 'Entity 2: the error was flagged on the correct element.');
 
     // Test that reordering works on both entities.
-    $edit = array(
+    $edit = [
       'field_unlimited[0][_weight]' => 0,
       'field_unlimited[1][_weight]' => -1,
       'entity_2[field_unlimited][0][_weight]' => 0,
       'entity_2[field_unlimited][1][_weight]' => -1,
-    );
+    ];
     $this->drupalPostForm('test-entity/nested/1/2', $edit, t('Save'));
-    $this->assertFieldValues($entity_1, 'field_unlimited', array(3, 2));
-    $this->assertFieldValues($entity_2, 'field_unlimited', array(13, 12));
+    $this->assertFieldValues($entity_1, 'field_unlimited', [3, 2]);
+    $this->assertFieldValues($entity_2, 'field_unlimited', [13, 12]);
 
     // Test the 'add more' buttons. Only Ajax submission is tested, because
     // the two 'add more' buttons present in the form have the same #value,
     // which confuses drupalPostForm().
     // 'Add more' button in the first entity:
     $this->drupalGet('test-entity/nested/1/2');
-    $this->drupalPostAjaxForm(NULL, array(), 'field_unlimited_add_more');
+    $this->drupalPostAjaxForm(NULL, [], 'field_unlimited_add_more');
     $this->assertFieldByName('field_unlimited[0][value]', 3, 'Entity 1: field_unlimited value 0 appears correctly is the form.');
     $this->assertFieldByName('field_unlimited[1][value]', 2, 'Entity 1: field_unlimited value 1 appears correctly is the form.');
     $this->assertFieldByName('field_unlimited[2][value]', '', 'Entity 1: field_unlimited value 2 appears correctly is the form.');
     $this->assertFieldByName('field_unlimited[3][value]', '', 'Entity 1: an empty widget was added for field_unlimited value 3.');
     // 'Add more' button in the first entity (changing field values):
-    $edit = array(
+    $edit = [
       'entity_2[field_unlimited][0][value]' => 13,
       'entity_2[field_unlimited][1][value]' => 14,
       'entity_2[field_unlimited][2][value]' => 15,
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, 'entity_2_field_unlimited_add_more');
     $this->assertFieldByName('entity_2[field_unlimited][0][value]', 13, 'Entity 2: field_unlimited value 0 appears correctly is the form.');
     $this->assertFieldByName('entity_2[field_unlimited][1][value]', 14, 'Entity 2: field_unlimited value 1 appears correctly is the form.');
     $this->assertFieldByName('entity_2[field_unlimited][2][value]', 15, 'Entity 2: field_unlimited value 2 appears correctly is the form.');
     $this->assertFieldByName('entity_2[field_unlimited][3][value]', '', 'Entity 2: an empty widget was added for field_unlimited value 3.');
     // Save the form and check values are saved correctly.
-    $this->drupalPostForm(NULL, array(), t('Save'));
-    $this->assertFieldValues($entity_1, 'field_unlimited', array(3, 2));
-    $this->assertFieldValues($entity_2, 'field_unlimited', array(13, 14, 15));
+    $this->drupalPostForm(NULL, [], t('Save'));
+    $this->assertFieldValues($entity_1, 'field_unlimited', [3, 2]);
+    $this->assertFieldValues($entity_2, 'field_unlimited', [13, 14, 15]);
   }
 
   /**
diff --git a/core/modules/field/src/Tests/Number/NumberFieldTest.php b/core/modules/field/src/Tests/Number/NumberFieldTest.php
index 14777ec3424f3fc140e6c3340bd654eccc56253c..3fea6166b2ffffc4339f7659b11c93cf90cd1a03 100644
--- a/core/modules/field/src/Tests/Number/NumberFieldTest.php
+++ b/core/modules/field/src/Tests/Number/NumberFieldTest.php
@@ -20,11 +20,11 @@ class NumberFieldTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'entity_test', 'field_ui');
+  public static $modules = ['node', 'entity_test', 'field_ui'];
 
   protected function setUp() {
     parent::setUp();
-    $this->drupalLogin($this->drupalCreateUser(array(
+    $this->drupalLogin($this->drupalCreateUser([
       'view test entity',
       'administer entity_test content',
       'administer content types',
@@ -32,7 +32,7 @@ protected function setUp() {
       'administer node display',
       'bypass node access',
       'administer entity_test fields',
-    )));
+    ]));
   }
 
   /**
@@ -41,14 +41,14 @@ protected function setUp() {
   function testNumberDecimalField() {
     // Create a field with settings to validate.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'decimal',
-      'settings' => array(
+      'settings' => [
         'precision' => 8, 'scale' => 4,
-      )
-    ))->save();
+      ]
+    ])->save();
     FieldConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
@@ -56,17 +56,17 @@ function testNumberDecimalField() {
     ])->save();
 
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'number',
-        'settings' => array(
+        'settings' => [
           'placeholder' => '0.00'
-        ),
-      ))
+        ],
+      ])
       ->save();
     entity_get_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'number_decimal',
-      ))
+      ])
       ->save();
 
     // Display creation form.
@@ -76,49 +76,49 @@ function testNumberDecimalField() {
 
     // Submit a signed decimal value within the allowed precision and scale.
     $value = '-1234.5678';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
     $this->assertRaw($value, 'Value is displayed.');
 
     // Try to create entries with more than one decimal separator; assert fail.
-    $wrong_entries = array(
+    $wrong_entries = [
       '3.14.159',
       '0..45469',
       '..4589',
       '6.459.52',
       '6.3..25',
-    );
+    ];
 
     foreach ($wrong_entries as $wrong_entry) {
       $this->drupalGet('entity_test/add');
-      $edit = array(
+      $edit = [
         "{$field_name}[0][value]" => $wrong_entry,
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save'));
-      $this->assertRaw(t('%name must be a number.', array('%name' => $field_name)), 'Correctly failed to save decimal value with more than one decimal point.');
+      $this->assertRaw(t('%name must be a number.', ['%name' => $field_name]), 'Correctly failed to save decimal value with more than one decimal point.');
     }
 
     // Try to create entries with minus sign not in the first position.
-    $wrong_entries = array(
+    $wrong_entries = [
       '3-3',
       '4-',
       '1.3-',
       '1.2-4',
       '-10-10',
-    );
+    ];
 
     foreach ($wrong_entries as $wrong_entry) {
       $this->drupalGet('entity_test/add');
-      $edit = array(
+      $edit = [
         "{$field_name}[0][value]" => $wrong_entry,
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save'));
-      $this->assertRaw(t('%name must be a number.', array('%name' => $field_name)), 'Correctly failed to save decimal value with minus sign in the wrong position.');
+      $this->assertRaw(t('%name must be a number.', ['%name' => $field_name]), 'Correctly failed to save decimal value with minus sign in the wrong position.');
     }
   }
 
@@ -131,52 +131,52 @@ function testNumberIntegerField() {
 
     // Create a field with settings to validate.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $storage = FieldStorageConfig::create(array(
+    $storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'integer',
-    ));
+    ]);
     $storage->save();
 
     FieldConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
-      'settings' => array(
+      'settings' => [
         'min' => $minimum, 'max' => $maximum, 'prefix' => 'ThePrefix',
-      )
+      ]
     ])->save();
 
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'number',
-        'settings' => array(
+        'settings' => [
           'placeholder' => '4'
-        ),
-      ))
+        ],
+      ])
       ->save();
     entity_get_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'number_integer',
-        'settings' => array(
+        'settings' => [
           'prefix_suffix' => FALSE,
-        ),
-      ))
+        ],
+      ])
       ->save();
 
     // Check the storage schema.
-    $expected = array(
-      'columns' => array(
-        'value' => array(
+    $expected = [
+      'columns' => [
+        'value' => [
           'type' => 'int',
           'unsigned' => '',
           'size' => 'normal'
-        ),
-      ),
-      'unique keys' => array(),
-      'indexes' => array(),
-      'foreign keys' => array()
-    );
+        ],
+      ],
+      'unique keys' => [],
+      'indexes' => [],
+      'foreign keys' => []
+    ];
     $this->assertEqual($storage->getSchema(), $expected);
 
     // Display creation form.
@@ -186,84 +186,84 @@ function testNumberIntegerField() {
 
     // Submit a valid integer
     $value = rand($minimum, $maximum);
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
 
     // Try to set a value below the minimum value
     $this->drupalGet('entity_test/add');
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $minimum - 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('%name must be higher than or equal to %minimum.', array('%name' => $field_name, '%minimum' => $minimum)), 'Correctly failed to save integer value less than minimum allowed value.');
+    $this->assertRaw(t('%name must be higher than or equal to %minimum.', ['%name' => $field_name, '%minimum' => $minimum]), 'Correctly failed to save integer value less than minimum allowed value.');
 
     // Try to set a decimal value
     $this->drupalGet('entity_test/add');
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => 1.5,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('%name is not a valid number.', array('%name' => $field_name)), 'Correctly failed to save decimal value to integer field.');
+    $this->assertRaw(t('%name is not a valid number.', ['%name' => $field_name]), 'Correctly failed to save decimal value to integer field.');
 
     // Try to set a value above the maximum value
     $this->drupalGet('entity_test/add');
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $maximum + 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('%name must be lower than or equal to %maximum.', array('%name' => $field_name, '%maximum' => $maximum)), 'Correctly failed to save integer value greater than maximum allowed value.');
+    $this->assertRaw(t('%name must be lower than or equal to %maximum.', ['%name' => $field_name, '%maximum' => $maximum]), 'Correctly failed to save integer value greater than maximum allowed value.');
 
     // Try to set a wrong integer value.
     $this->drupalGet('entity_test/add');
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => '20-40',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('%name must be a number.', array('%name' => $field_name)), 'Correctly failed to save wrong integer value.');
+    $this->assertRaw(t('%name must be a number.', ['%name' => $field_name]), 'Correctly failed to save wrong integer value.');
 
     // Test with valid entries.
-    $valid_entries = array(
+    $valid_entries = [
       '-1234',
       '0',
       '1234',
-    );
+    ];
 
     foreach ($valid_entries as $valid_entry) {
       $this->drupalGet('entity_test/add');
-      $edit = array(
+      $edit = [
         "{$field_name}[0][value]" => $valid_entry,
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save'));
       preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
       $id = $match[1];
-      $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+      $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
       $this->assertRaw($valid_entry, 'Value is displayed.');
       $this->assertNoFieldByXpath('//div[@content="' . $valid_entry . '"]', NULL, 'The "content" attribute is not present since the Prefix is not being displayed');
     }
 
     // Test for the content attribute when a Prefix is displayed. Presumably this also tests for the attribute when a Suffix is displayed.
     entity_get_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'number_integer',
-        'settings' => array(
+        'settings' => [
           'prefix_suffix' => TRUE,
-        ),
-      ))
+        ],
+      ])
       ->save();
     $integer_value = '123';
     $this->drupalGet('entity_test/add');
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $integer_value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
     $this->drupalGet('entity_test/' . $id);
     $this->assertFieldByXPath('//div[@content="' . $integer_value . '"]', 'ThePrefix' . $integer_value, 'The "content" attribute has been set to the value of the field, and the prefix is being displayed.');
   }
@@ -274,11 +274,11 @@ function testNumberIntegerField() {
   function testNumberFloatField() {
     // Create a field with settings to validate.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'float',
-    ))->save();
+    ])->save();
 
     FieldConfig::create([
       'field_name' => $field_name,
@@ -287,18 +287,18 @@ function testNumberFloatField() {
     ])->save();
 
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'number',
-        'settings' => array(
+        'settings' => [
           'placeholder' => '0.00'
-        ),
-      ))
+        ],
+      ])
       ->save();
 
     entity_get_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'number_decimal',
-      ))
+      ])
       ->save();
 
     // Display creation form.
@@ -308,13 +308,13 @@ function testNumberFloatField() {
 
     // Submit a signed decimal value within the allowed precision and scale.
     $value = '-1234.5678';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
 
     // Ensure that the 'number_decimal' formatter displays the number with the
     // expected rounding.
@@ -322,39 +322,39 @@ function testNumberFloatField() {
     $this->assertRaw(round($value, 2));
 
     // Try to create entries with more than one decimal separator; assert fail.
-    $wrong_entries = array(
+    $wrong_entries = [
       '3.14.159',
       '0..45469',
       '..4589',
       '6.459.52',
       '6.3..25',
-    );
+    ];
 
     foreach ($wrong_entries as $wrong_entry) {
       $this->drupalGet('entity_test/add');
-      $edit = array(
+      $edit = [
         "{$field_name}[0][value]" => $wrong_entry,
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save'));
-      $this->assertRaw(t('%name must be a number.', array('%name' => $field_name)), 'Correctly failed to save float value with more than one decimal point.');
+      $this->assertRaw(t('%name must be a number.', ['%name' => $field_name]), 'Correctly failed to save float value with more than one decimal point.');
     }
 
     // Try to create entries with minus sign not in the first position.
-    $wrong_entries = array(
+    $wrong_entries = [
       '3-3',
       '4-',
       '1.3-',
       '1.2-4',
       '-10-10',
-    );
+    ];
 
     foreach ($wrong_entries as $wrong_entry) {
       $this->drupalGet('entity_test/add');
-      $edit = array(
+      $edit = [
         "{$field_name}[0][value]" => $wrong_entry,
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save'));
-      $this->assertRaw(t('%name must be a number.', array('%name' => $field_name)), 'Correctly failed to save float value with minus sign in the wrong position.');
+      $this->assertRaw(t('%name must be a number.', ['%name' => $field_name]), 'Correctly failed to save float value with minus sign in the wrong position.');
     }
   }
 
@@ -365,70 +365,70 @@ function testNumberFormatter() {
     $type = Unicode::strtolower($this->randomMachineName());
     $float_field = Unicode::strtolower($this->randomMachineName());
     $integer_field = Unicode::strtolower($this->randomMachineName());
-    $thousand_separators = array('', '.', ',', ' ', chr(8201), "'");
-    $decimal_separators = array('.', ',');
+    $thousand_separators = ['', '.', ',', ' ', chr(8201), "'"];
+    $decimal_separators = ['.', ','];
     $prefix = $this->randomMachineName();
     $suffix = $this->randomMachineName();
     $random_float = rand(0, pow(10, 6));
     $random_integer = rand(0, pow(10, 6));
 
     // Create a content type containing float and integer fields.
-    $this->drupalCreateContentType(array('type' => $type));
+    $this->drupalCreateContentType(['type' => $type]);
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $float_field,
       'entity_type' => 'node',
       'type' => 'float',
-    ))->save();
+    ])->save();
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $integer_field,
       'entity_type' => 'node',
       'type' => 'integer',
-    ))->save();
+    ])->save();
 
     FieldConfig::create([
       'field_name' => $float_field,
       'entity_type' => 'node',
       'bundle' => $type,
-      'settings' => array(
+      'settings' => [
         'prefix' => $prefix,
         'suffix' => $suffix
-      ),
+      ],
     ])->save();
 
     FieldConfig::create([
       'field_name' => $integer_field,
       'entity_type' => 'node',
       'bundle' => $type,
-      'settings' => array(
+      'settings' => [
         'prefix' => $prefix,
         'suffix' => $suffix
-      ),
+      ],
     ])->save();
 
     entity_get_form_display('node', $type, 'default')
-      ->setComponent($float_field, array(
+      ->setComponent($float_field, [
         'type' => 'number',
-        'settings' => array(
+        'settings' => [
           'placeholder' => '0.00'
-        ),
-      ))
-      ->setComponent($integer_field, array(
+        ],
+      ])
+      ->setComponent($integer_field, [
         'type' => 'number',
-        'settings' => array(
+        'settings' => [
           'placeholder' => '0.00'
-        ),
-      ))
+        ],
+      ])
       ->save();
 
     entity_get_display('node', $type, 'default')
-      ->setComponent($float_field, array(
+      ->setComponent($float_field, [
         'type' => 'number_decimal',
-      ))
-      ->setComponent($integer_field, array(
+      ])
+      ->setComponent($integer_field, [
         'type' => 'number_unformatted',
-      ))
+      ])
       ->save();
 
     // Create a node to test formatters.
@@ -448,15 +448,15 @@ function testNumberFormatter() {
     $decimal_separator = $decimal_separators[array_rand($decimal_separators)];
     $scale = rand(0, 10);
 
-    $this->drupalPostAjaxForm(NULL, array(), "${float_field}_settings_edit");
-    $edit = array(
+    $this->drupalPostAjaxForm(NULL, [], "${float_field}_settings_edit");
+    $edit = [
       "fields[${float_field}][settings_edit_form][settings][prefix_suffix]" => TRUE,
       "fields[${float_field}][settings_edit_form][settings][scale]" => $scale,
       "fields[${float_field}][settings_edit_form][settings][decimal_separator]" => $decimal_separator,
       "fields[${float_field}][settings_edit_form][settings][thousand_separator]" => $thousand_separator,
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, "${float_field}_plugin_settings_update");
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Check number_decimal and number_unformatted formatters behavior.
     $this->drupalGet('node/' . $node->id());
@@ -466,21 +466,21 @@ function testNumberFormatter() {
 
     // Configure the number_decimal formatter.
     entity_get_display('node', $type, 'default')
-      ->setComponent($integer_field, array(
+      ->setComponent($integer_field, [
         'type' => 'number_integer',
-      ))
+      ])
       ->save();
     $this->drupalGet("admin/structure/types/manage/$type/display");
 
     $thousand_separator = $thousand_separators[array_rand($thousand_separators)];
 
-    $this->drupalPostAjaxForm(NULL, array(), "${integer_field}_settings_edit");
-    $edit = array(
+    $this->drupalPostAjaxForm(NULL, [], "${integer_field}_settings_edit");
+    $edit = [
       "fields[${integer_field}][settings_edit_form][settings][prefix_suffix]" => FALSE,
       "fields[${integer_field}][settings_edit_form][settings][thousand_separator]" => $thousand_separator,
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, "${integer_field}_plugin_settings_update");
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Check number_integer formatter behavior.
     $this->drupalGet('node/' . $node->id());
@@ -495,11 +495,11 @@ function testNumberFormatter() {
   function testCreateNumberFloatField() {
     // Create a float field.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'float',
-    ))->save();
+    ])->save();
 
     $field = FieldConfig::create([
       'field_name' => $field_name,
@@ -520,11 +520,11 @@ function testCreateNumberFloatField() {
   function testCreateNumberDecimalField() {
     // Create a decimal field.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'decimal',
-    ))->save();
+    ])->save();
 
     $field = FieldConfig::create([
       'field_name' => $field_name,
@@ -546,14 +546,14 @@ function assertSetMinimumValue($field, $minimum_value) {
     $field_configuration_url = 'entity_test/structure/entity_test/fields/entity_test.entity_test.' . $field->getName();
 
     // Set the minimum value.
-    $edit = array(
+    $edit = [
       'settings[min]' => $minimum_value,
-    );
+    ];
     $this->drupalPostForm($field_configuration_url, $edit, t('Save settings'));
     // Check if an error message is shown.
-    $this->assertNoRaw(t('%name is not a valid number.', array('%name' => t('Minimum'))), 'Saved ' . gettype($minimum_value) . '  value as minimal value on a ' . $field->getType() . ' field');
+    $this->assertNoRaw(t('%name is not a valid number.', ['%name' => t('Minimum')]), 'Saved ' . gettype($minimum_value) . '  value as minimal value on a ' . $field->getType() . ' field');
     // Check if a success message is shown.
-    $this->assertRaw(t('Saved %label configuration.', array('%label' => $field->getLabel())));
+    $this->assertRaw(t('Saved %label configuration.', ['%label' => $field->getLabel()]));
     // Check if the minimum value was actually set.
     $this->drupalGet($field_configuration_url);
     $this->assertFieldById('edit-settings-min', $minimum_value, 'Minimal ' . gettype($minimum_value) . '  value was set on a ' . $field->getType() . ' field.');
diff --git a/core/modules/field/src/Tests/String/StringFieldTest.php b/core/modules/field/src/Tests/String/StringFieldTest.php
index 0ac574877597d7a58432d42f34b09d5bd7c62f57..6bd034d613010adfd1053cf954027a3b9c391a1b 100644
--- a/core/modules/field/src/Tests/String/StringFieldTest.php
+++ b/core/modules/field/src/Tests/String/StringFieldTest.php
@@ -20,7 +20,7 @@ class StringFieldTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'file');
+  public static $modules = ['entity_test', 'file'];
 
   /**
    * A user without any special permissions.
@@ -32,7 +32,7 @@ class StringFieldTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array('view test entity', 'administer entity_test content'));
+    $this->webUser = $this->drupalCreateUser(['view test entity', 'administer entity_test content']);
     $this->drupalLogin($this->webUser);
   }
 
@@ -52,11 +52,11 @@ function testTextfieldWidgets() {
   function _testTextfieldWidgets($field_type, $widget_type) {
     // Create a field.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => $field_type
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -64,12 +64,12 @@ function _testTextfieldWidgets($field_type, $widget_type) {
       'label' => $this->randomMachineName() . '_label',
     ])->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => $widget_type,
-        'settings' => array(
+        'settings' => [
           'placeholder' => 'A placeholder on ' . $widget_type,
-        ),
-      ))
+        ],
+      ])
       ->save();
     entity_get_display('entity_test', 'entity_test', 'full')
       ->setComponent($field_name)
@@ -79,17 +79,17 @@ function _testTextfieldWidgets($field_type, $widget_type) {
     $this->drupalGet('entity_test/add');
     $this->assertFieldByName("{$field_name}[0][value]", '', 'Widget is displayed');
     $this->assertNoFieldByName("{$field_name}[0][format]", '1', 'Format selector is not displayed');
-    $this->assertRaw(format_string('placeholder="A placeholder on @widget_type"', array('@widget_type' => $widget_type)));
+    $this->assertRaw(format_string('placeholder="A placeholder on @widget_type"', ['@widget_type' => $widget_type]));
 
     // Submit with some value.
     $value = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
 
     // Display the entity.
     $entity = EntityTest::load($id);
diff --git a/core/modules/field/src/Tests/Views/FieldTestBase.php b/core/modules/field/src/Tests/Views/FieldTestBase.php
index 0f977a82c73a448df136b640c37d38e93b51f0be..cd579943757f8cd444337d821dbeae2cb115c41d 100644
--- a/core/modules/field/src/Tests/Views/FieldTestBase.php
+++ b/core/modules/field/src/Tests/Views/FieldTestBase.php
@@ -25,7 +25,7 @@ abstract class FieldTestBase extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_test_views');
+  public static $modules = ['node', 'field_test_views'];
 
   /**
    * Stores the field definitions used by the test.
@@ -51,19 +51,19 @@ protected function setUp() {
       'name' => 'page',
     ])->save();
 
-    ViewTestData::createTestViews(get_class($this), array('field_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['field_test_views']);
   }
 
   function setUpFieldStorages($amount = 3, $type = 'string') {
     // Create three fields.
-    $field_names = array();
+    $field_names = [];
     for ($i = 0; $i < $amount; $i++) {
       $field_names[$i] = 'field_name_' . $i;
-      $this->fieldStorages[$i] = FieldStorageConfig::create(array(
+      $this->fieldStorages[$i] = FieldStorageConfig::create([
         'field_name' => $field_names[$i],
         'entity_type' => 'node',
         'type' => $type,
-      ));
+      ]);
       $this->fieldStorages[$i]->save();
     }
     return $field_names;
diff --git a/core/modules/field/src/Tests/Views/FieldUITest.php b/core/modules/field/src/Tests/Views/FieldUITest.php
index c47bf1962fecf4794447eb82bae3dd4f509aa20f..ce8208ba65d310105765126add7d715ea44862dd 100644
--- a/core/modules/field/src/Tests/Views/FieldUITest.php
+++ b/core/modules/field/src/Tests/Views/FieldUITest.php
@@ -19,14 +19,14 @@ class FieldUITest extends FieldTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view_fieldapi');
+  public static $testViews = ['test_view_fieldapi'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('views_ui');
+  public static $modules = ['views_ui'];
 
   /**
    * A user with the 'administer views' permission.
@@ -41,7 +41,7 @@ class FieldUITest extends FieldTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->account = $this->drupalCreateUser(array('administer views'));
+    $this->account = $this->drupalCreateUser(['administer views']);
     $this->drupalLogin($this->account);
 
     $this->setUpFieldStorages(1, 'text');
@@ -56,26 +56,26 @@ public function testHandlerUI() {
     $this->drupalGet($url);
 
     // Tests the available formatter options.
-    $result = $this->xpath('//select[@id=:id]/option', array(':id' => 'edit-options-type'));
+    $result = $this->xpath('//select[@id=:id]/option', [':id' => 'edit-options-type']);
     $options = array_map(function($item) {
       return (string) $item->attributes()->value[0];
     }, $result);
     // @todo Replace this sort by assertArray once it's in.
     sort($options, SORT_STRING);
-    $this->assertEqual($options, array('text_default', 'text_trimmed'), 'The text formatters for a simple text field appear as expected.');
+    $this->assertEqual($options, ['text_default', 'text_trimmed'], 'The text formatters for a simple text field appear as expected.');
 
-    $this->drupalPostForm(NULL, array('options[type]' => 'text_trimmed'), t('Apply'));
+    $this->drupalPostForm(NULL, ['options[type]' => 'text_trimmed'], t('Apply'));
 
     $this->drupalGet($url);
     $this->assertOptionSelected('edit-options-type', 'text_trimmed');
 
     $random_number = rand(100, 400);
-    $this->drupalPostForm(NULL, array('options[settings][trim_length]' => $random_number), t('Apply'));
+    $this->drupalPostForm(NULL, ['options[settings][trim_length]' => $random_number], t('Apply'));
     $this->drupalGet($url);
     $this->assertFieldByName('options[settings][trim_length]', $random_number, 'The formatter setting got saved.');
 
     // Save the view and test whether the settings are saved.
-    $this->drupalPostForm('admin/structure/views/view/test_view_fieldapi', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/views/view/test_view_fieldapi', [], t('Save'));
     $view = Views::getView('test_view_fieldapi');
     $view->initHandlers();
     $this->assertEqual($view->field['field_name_0']->options['type'], 'text_trimmed');
@@ -101,7 +101,7 @@ public function testHandlerUI() {
    */
   public function testHandlerUIAggregation() {
     // Enable aggregation.
-    $edit = array('group_by' => '1');
+    $edit = ['group_by' => '1'];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_view_fieldapi/default/group_by', $edit, t('Apply'));
 
     $url = "admin/structure/views/nojs/handler/test_view_fieldapi/default/field/field_name_0";
@@ -110,13 +110,13 @@ public function testHandlerUIAggregation() {
 
     // Test the click sort column options.
     // Tests the available formatter options.
-    $result = $this->xpath('//select[@id=:id]/option', array(':id' => 'edit-options-click-sort-column'));
+    $result = $this->xpath('//select[@id=:id]/option', [':id' => 'edit-options-click-sort-column']);
     $options = array_map(function($item) {
       return (string) $item->attributes()->value[0];
     }, $result);
     sort($options, SORT_STRING);
 
-    $this->assertEqual($options, array('format', 'value'), 'The expected sort field options were found.');
+    $this->assertEqual($options, ['format', 'value'], 'The expected sort field options were found.');
   }
 
   /**
@@ -138,7 +138,7 @@ public function testBooleanFilterHandler() {
     $field->save();
 
     $url = "admin/structure/views/nojs/add-handler/test_view_fieldapi/default/filter";
-    $this->drupalPostForm($url, ['name[node__' . $field_name . '.' . $field_name . '_value]' => TRUE], t('Add and configure @handler', array('@handler' => t('filter criteria'))));
+    $this->drupalPostForm($url, ['name[node__' . $field_name . '.' . $field_name . '_value]' => TRUE], t('Add and configure @handler', ['@handler' => t('filter criteria')]));
     $this->assertResponse(200);
     // Verify that using a boolean field as a filter also results in using the
     // boolean plugin.
diff --git a/core/modules/field/src/Tests/Views/HandlerFieldFieldTest.php b/core/modules/field/src/Tests/Views/HandlerFieldFieldTest.php
index 303eb2fd7e179d4c9f716db5a822062aff5713fd..dfbb89bd209dac7f335cbb4ef8863cd1225f9d49 100644
--- a/core/modules/field/src/Tests/Views/HandlerFieldFieldTest.php
+++ b/core/modules/field/src/Tests/Views/HandlerFieldFieldTest.php
@@ -22,14 +22,14 @@ class HandlerFieldFieldTest extends FieldTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('node', 'field_test');
+  public static $modules = ['node', 'field_test'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view_fieldapi');
+  public static $testViews = ['test_view_fieldapi'];
 
   /**
    * Test nodes.
@@ -48,47 +48,47 @@ protected function setUp() {
     $this->setUpFieldStorages(3);
 
     // Setup a field with cardinality > 1.
-    $this->fieldStorages[3] = FieldStorageConfig::create(array(
+    $this->fieldStorages[3] = FieldStorageConfig::create([
       'field_name' => 'field_name_3',
       'entity_type' => 'node',
       'type' => 'string',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ));
+    ]);
     $this->fieldStorages[3]->save();
     // Setup a field that will have no value.
-    $this->fieldStorages[4] = FieldStorageConfig::create(array(
+    $this->fieldStorages[4] = FieldStorageConfig::create([
       'field_name' => 'field_name_4',
       'entity_type' => 'node',
       'type' => 'string',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ));
+    ]);
     $this->fieldStorages[4]->save();
 
     // Setup a text field.
-    $this->fieldStorages[5] = FieldStorageConfig::create(array(
+    $this->fieldStorages[5] = FieldStorageConfig::create([
       'field_name' => 'field_name_5',
       'entity_type' => 'node',
       'type' => 'text',
-    ));
+    ]);
     $this->fieldStorages[5]->save();
 
     // Setup a text field with access control.
     // @see field_test_entity_field_access()
-    $this->fieldStorages[6] = FieldStorageConfig::create(array(
+    $this->fieldStorages[6] = FieldStorageConfig::create([
       'field_name' => 'field_no_view_access',
       'entity_type' => 'node',
       'type' => 'text',
-    ));
+    ]);
     $this->fieldStorages[6]->save();
 
     $this->setUpFields();
 
     // Create some nodes.
-    $this->nodes = array();
+    $this->nodes = [];
     for ($i = 0; $i < 3; $i++) {
-      $edit = array('type' => 'page');
+      $edit = ['type' => 'page'];
 
-      foreach (array(0, 1, 2, 5) as $key) {
+      foreach ([0, 1, 2, 5] as $key) {
         $field_storage = $this->fieldStorages[$key];
         $edit[$field_storage->getName()][0]['value'] = $this->randomMachineName(8);
       }
@@ -98,7 +98,7 @@ protected function setUp() {
         $edit[$this->fieldStorages[3]->getName()][$j]['value'] = $this->randomMachineName(8);
       }
       // Set this field to be empty.
-      $edit[$this->fieldStorages[4]->getName()] = array(array('value' => NULL));
+      $edit[$this->fieldStorages[4]->getName()] = [['value' => NULL]];
 
       $this->nodes[$i] = $this->drupalCreateNode($edit);
     }
@@ -171,9 +171,9 @@ public function _testFormatterSimpleFieldRender() {
     $view = Views::getView('test_view_fieldapi');
     $this->prepareView($view);
     $view->displayHandlers->get('default')->options['fields'][$this->fieldStorages[5]->getName()]['type'] = 'text_trimmed';
-    $view->displayHandlers->get('default')->options['fields'][$this->fieldStorages[5]->getName()]['settings'] = array(
+    $view->displayHandlers->get('default')->options['fields'][$this->fieldStorages[5]->getName()]['settings'] = [
       'trim_length' => 3,
-    );
+    ];
     $this->executeView($view);
 
     // Make sure that the formatter works as expected.
@@ -196,7 +196,7 @@ public function _testMultipleFieldRender() {
 
     for ($i = 0; $i < 3; $i++) {
       $rendered_field = $view->style_plugin->getField($i, $field_name);
-      $items = array();
+      $items = [];
       $pure_items = $this->nodes[$i]->{$field_name}->getValue();
       $pure_items = array_splice($pure_items, 0, 3);
       foreach ($pure_items as $j => $item) {
@@ -218,7 +218,7 @@ public function _testMultipleFieldRender() {
 
     for ($i = 0; $i < 3; $i++) {
       $rendered_field = $view->style_plugin->getField($i, $field_name);
-      $items = array();
+      $items = [];
       $pure_items = $this->nodes[$i]->{$field_name}->getValue();
       $pure_items = array_splice($pure_items, 1, 3);
       foreach ($pure_items as $j => $item) {
@@ -238,7 +238,7 @@ public function _testMultipleFieldRender() {
 
     for ($i = 0; $i < 3; $i++) {
       $rendered_field = $view->style_plugin->getField($i, $field_name);
-      $items = array();
+      $items = [];
       $pure_items = $this->nodes[$i]->{$field_name}->getValue();
       array_splice($pure_items, 0, -3);
       $pure_items = array_reverse($pure_items);
@@ -259,7 +259,7 @@ public function _testMultipleFieldRender() {
 
     for ($i = 0; $i < 3; $i++) {
       $rendered_field = $view->style_plugin->getField($i, $field_name);
-      $items = array();
+      $items = [];
       $pure_items = $this->nodes[$i]->{$field_name}->getValue();
       $items[] = $pure_items[0]['value'];
       $items[] = $pure_items[4]['value'];
@@ -277,7 +277,7 @@ public function _testMultipleFieldRender() {
 
     for ($i = 0; $i < 3; $i++) {
       $rendered_field = $view->style_plugin->getField($i, $field_name);
-      $items = array();
+      $items = [];
       $pure_items = $this->nodes[$i]->{$field_name}->getValue();
       $pure_items = array_splice($pure_items, 0, 3);
       foreach ($pure_items as $j => $item) {
diff --git a/core/modules/field/src/Tests/reEnableModuleFieldTest.php b/core/modules/field/src/Tests/reEnableModuleFieldTest.php
index b718e75883cdbbfce1b3c8745ad12ecc75655802..141b5e12bad998125e6ad7a78a676a611dce0051 100644
--- a/core/modules/field/src/Tests/reEnableModuleFieldTest.php
+++ b/core/modules/field/src/Tests/reEnableModuleFieldTest.php
@@ -18,22 +18,22 @@ class reEnableModuleFieldTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'field',
     'node',
     // We use telephone module instead of test_field because test_field is
     // hidden and does not display on the admin/modules page.
     'telephone'
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'article'));
-    $this->drupalLogin($this->drupalCreateUser(array(
+    $this->drupalCreateContentType(['type' => 'article']);
+    $this->drupalLogin($this->drupalCreateUser([
       'create article content',
       'edit own article content',
-    )));
+    ]));
   }
 
   /**
@@ -44,11 +44,11 @@ protected function setUp() {
   function testReEnabledField() {
 
     // Add a telephone field to the article content type.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_telephone',
       'entity_type' => 'node',
       'type' => 'telephone',
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -57,19 +57,19 @@ function testReEnabledField() {
     ])->save();
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent('field_telephone', array(
+      ->setComponent('field_telephone', [
         'type' => 'telephone_default',
-        'settings' => array(
+        'settings' => [
           'placeholder' => '123-456-7890',
-        ),
-      ))
+        ],
+      ])
       ->save();
 
     entity_get_display('node', 'article', 'default')
-      ->setComponent('field_telephone', array(
+      ->setComponent('field_telephone', [
         'type' => 'telephone_link',
         'weight' => 1,
-      ))
+      ])
       ->save();
 
     // Display the article node form and verify the telephone widget is present.
@@ -78,16 +78,16 @@ function testReEnabledField() {
 
     // Submit an article node with a telephone field so data exist for the
     // field.
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
       'field_telephone[0][value]' => "123456789",
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertRaw('<a href="tel:123456789">');
 
     // Test that the module can't be uninstalled from the UI while there is data
     // for it's fields.
-    $admin_user = $this->drupalCreateUser(array('access administration pages', 'administer modules'));
+    $admin_user = $this->drupalCreateUser(['access administration pages', 'administer modules']);
     $this->drupalLogin($admin_user);
     $this->drupalGet('admin/modules/uninstall');
     $this->assertText("The Telephone number field type is used in the following field: node.field_telephone");
@@ -95,11 +95,11 @@ function testReEnabledField() {
     // Add another telephone field to a different entity type in order to test
     // the message for the case when multiple fields are blocking the
     // uninstallation of a module.
-    $field_storage2 = entity_create('field_storage_config', array(
+    $field_storage2 = entity_create('field_storage_config', [
       'field_name' => 'field_telephone_2',
       'entity_type' => 'user',
       'type' => 'telephone',
-    ));
+    ]);
     $field_storage2->save();
     FieldConfig::create([
       'field_storage' => $field_storage2,
diff --git a/core/modules/field/tests/modules/field_test/field_test.entity.inc b/core/modules/field/tests/modules/field_test/field_test.entity.inc
index d5614acd8ea4fdf8530c4ecbf1292cb6a3d4ac31..ee831ff2b60a45e3fdefff84466b97a5d2a5bcd3 100644
--- a/core/modules/field/tests/modules/field_test/field_test.entity.inc
+++ b/core/modules/field/tests/modules/field_test/field_test.entity.inc
@@ -19,7 +19,7 @@ function field_test_entity_type_alter(array &$entity_types) {
  * Helper function to enable entity translations.
  */
 function field_test_entity_info_translatable($entity_type_id = NULL, $translatable = NULL) {
-  $stored_value = &drupal_static(__FUNCTION__, array());
+  $stored_value = &drupal_static(__FUNCTION__, []);
   if (isset($entity_type_id)) {
     $entity_manager = \Drupal::entityManager();
     $original = $entity_manager->getDefinition($entity_type_id);
diff --git a/core/modules/field/tests/modules/field_test/field_test.field.inc b/core/modules/field/tests/modules/field_test/field_test.field.inc
index 9798fc745acf8c59eee7d9a629b2cd595ccfb3d3..5edd25d7636d5d2d7aa941cc19d2f532dc375b34 100644
--- a/core/modules/field/tests/modules/field_test/field_test.field.inc
+++ b/core/modules/field/tests/modules/field_test/field_test.field.inc
@@ -34,7 +34,7 @@ function field_test_field_storage_config_update_forbid(FieldStorageConfigInterfa
  * Sample 'default value' callback.
  */
 function field_test_default_value(FieldableEntityInterface $entity, FieldDefinitionInterface $definition) {
-  return array(array('value' => 99));
+  return [['value' => 99]];
 }
 
 /**
diff --git a/core/modules/field/tests/modules/field_test/field_test.module b/core/modules/field/tests/modules/field_test/field_test.module
index 7eda28852726b3dee56e5a51d727c47cf88bdef3..f81983637fb01102d0b95823385676e480a51532 100644
--- a/core/modules/field/tests/modules/field_test/field_test.module
+++ b/core/modules/field/tests/modules/field_test/field_test.module
@@ -66,7 +66,7 @@ function field_test_memorize($key = NULL, $value = NULL) {
 
   if (!isset($key)) {
     $return = $memorize;
-    $memorize = array();
+    $memorize = [];
     return $return;
   }
   if (is_array($memorize)) {
@@ -88,11 +88,11 @@ function field_test_field_storage_config_create(FieldStorageConfigInterface $fie
 function field_test_entity_display_build_alter(&$output, $context) {
   $display_options = $context['display']->getComponent('test_field');
   if (isset($display_options['settings']['alter'])) {
-    $output['test_field'][] = array('#markup' => 'field_test_entity_display_build_alter');
+    $output['test_field'][] = ['#markup' => 'field_test_entity_display_build_alter'];
   }
 
   if (isset($output['test_field'])) {
-    $output['test_field'][] = array('#markup' => 'entity language is ' . $context['entity']->language()->getId());
+    $output['test_field'][] = ['#markup' => 'entity language is ' . $context['entity']->language()->getId()];
   }
 }
 
diff --git a/core/modules/field/tests/modules/field_test/src/Form/NestedEntityTestForm.php b/core/modules/field/tests/modules/field_test/src/Form/NestedEntityTestForm.php
index d54c6836fdf8cf2c84285e2d18c73fb162f75cab..949ffda667dfcd42209854429011af8642db67af 100644
--- a/core/modules/field/tests/modules/field_test/src/Form/NestedEntityTestForm.php
+++ b/core/modules/field/tests/modules/field_test/src/Form/NestedEntityTestForm.php
@@ -54,11 +54,11 @@ public function buildForm(array $form, FormStateInterface $form_state, EntityInt
       ];
     }
 
-    $form['save'] = array(
+    $form['save'] = [
       '#type' => 'submit',
       '#value' => t('Save'),
       '#weight' => 100,
-    );
+    ];
 
     return $form;
   }
@@ -101,7 +101,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $entity_2 = $form_state->get('entity_2');
     $entity_2->save();
 
-    drupal_set_message($this->t('test_entities @id_1 and @id_2 have been updated.', array('@id_1' => $entity_1->id(), '@id_2' => $entity_2->id())));
+    drupal_set_message($this->t('test_entities @id_1 and @id_2 have been updated.', ['@id_1' => $entity_1->id(), '@id_2' => $entity_2->id()]));
   }
 
 }
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldApplicableFormatter.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldApplicableFormatter.php
index c2916f5d68c233d97a363160f212eb2b90eab46e..418b4c6b245ec167b8de774035119831b64ddf88 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldApplicableFormatter.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldApplicableFormatter.php
@@ -34,7 +34,7 @@ public static function isApplicable(FieldDefinitionInterface $field_definition)
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    return array('#markup' => 'Nothing to see here');
+    return ['#markup' => 'Nothing to see here'];
   }
 
 }
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldDefaultFormatter.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldDefaultFormatter.php
index 5eb0354aefe384ed4bf4ef8628325e7942f31017..80f860bfafd3770ea0cd046bb4a7a14b1396867a 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldDefaultFormatter.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldDefaultFormatter.php
@@ -26,22 +26,22 @@ class TestFieldDefaultFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'test_formatter_setting' => 'dummy test string',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['test_formatter_setting'] = array(
+    $element['test_formatter_setting'] = [
       '#title' => t('Setting'),
       '#type' => 'textfield',
       '#size' => 20,
       '#default_value' => $this->getSetting('test_formatter_setting'),
       '#required' => TRUE,
-    );
+    ];
     return $element;
   }
 
@@ -49,8 +49,8 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
-    $summary[] = t('@setting: @value', array('@setting' => 'test_formatter_setting', '@value' => $this->getSetting('test_formatter_setting')));
+    $summary = [];
+    $summary[] = t('@setting: @value', ['@setting' => 'test_formatter_setting', '@value' => $this->getSetting('test_formatter_setting')]);
     return $summary;
   }
 
@@ -58,10 +58,10 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
-      $elements[$delta] = array('#markup' => $this->getSetting('test_formatter_setting') . '|' . $item->value);
+      $elements[$delta] = ['#markup' => $this->getSetting('test_formatter_setting') . '|' . $item->value];
     }
 
     return $elements;
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldEmptyFormatter.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldEmptyFormatter.php
index bbe0b308119db769e80fc92c525b0bfe8a09b03e..c8072177f16ec841d3ef304155e94fc2ebb7a795 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldEmptyFormatter.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldEmptyFormatter.php
@@ -23,25 +23,25 @@ class TestFieldEmptyFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'test_empty_string' => '**EMPTY FIELD**',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     if ($items->isEmpty()) {
       // For fields with no value, just add the configured "empty" value.
-      $elements[0] = array('#markup' => $this->getSetting('test_empty_string'));
+      $elements[0] = ['#markup' => $this->getSetting('test_empty_string')];
     }
     else {
       foreach ($items as $delta => $item) {
         // This formatter only needs to output raw for testing.
-        $elements[$delta] = array('#markup' => $item->value);
+        $elements[$delta] = ['#markup' => $item->value];
       }
     }
 
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldEmptySettingFormatter.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldEmptySettingFormatter.php
index ca088610835ed512678e93a69017791c10e73972..f36fea2c39149394ba1a22c46a909a75e98719b9 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldEmptySettingFormatter.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldEmptySettingFormatter.php
@@ -24,22 +24,22 @@ class TestFieldEmptySettingFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'field_empty_setting' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['field_empty_setting'] = array(
+    $element['field_empty_setting'] = [
       '#title' => t('Setting'),
       '#type' => 'textfield',
       '#size' => 20,
       '#default_value' => $this->getSetting('field_empty_setting'),
       '#required' => TRUE,
-    );
+    ];
     return $element;
   }
 
@@ -47,7 +47,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
     $setting = $this->getSetting('field_empty_setting');
     if (!empty($setting)) {
       $summary[] = t('Default empty setting now has a value.');
@@ -59,11 +59,11 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     if (!empty($items)) {
       foreach ($items as $delta => $item) {
-        $elements[$delta] = array('#markup' => $this->getSetting('field_empty_setting'));
+        $elements[$delta] = ['#markup' => $this->getSetting('field_empty_setting')];
       }
     }
 
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldMultipleFormatter.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldMultipleFormatter.php
index 97bb1e63622406ab4085f970ce49e51d997da44f..978e18fbac6eb7d4999ade66a4599c4dcd723df1 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldMultipleFormatter.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldMultipleFormatter.php
@@ -26,23 +26,23 @@ class TestFieldMultipleFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'test_formatter_setting_multiple' => 'dummy test string',
       'alter' => FALSE,
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['test_formatter_setting_multiple'] = array(
+    $element['test_formatter_setting_multiple'] = [
       '#title' => t('Setting'),
       '#type' => 'textfield',
       '#size' => 20,
       '#default_value' => $this->getSetting('test_formatter_setting_multiple'),
       '#required' => TRUE,
-    );
+    ];
     return $element;
   }
 
@@ -50,8 +50,8 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
-    $summary[] = t('@setting: @value', array('@setting' => 'test_formatter_setting_multiple', '@value' => $this->getSetting('test_formatter_setting_multiple')));
+    $summary = [];
+    $summary[] = t('@setting: @value', ['@setting' => 'test_formatter_setting_multiple', '@value' => $this->getSetting('test_formatter_setting_multiple')]);
     return $summary;
   }
 
@@ -59,14 +59,14 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     if (!empty($items)) {
-      $array = array();
+      $array = [];
       foreach ($items as $delta => $item) {
         $array[] = $delta . ':' . $item->value;
       }
-      $elements[0] = array('#markup' => $this->getSetting('test_formatter_setting_multiple') . '|' . implode('|', $array));
+      $elements[0] = ['#markup' => $this->getSetting('test_formatter_setting_multiple') . '|' . implode('|', $array)];
     }
 
     return $elements;
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldNoSettingsFormatter.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldNoSettingsFormatter.php
index 0ab66d5dd250e8f1cacffbc0611fbbd432363847..922207e51bde491272ac19a3684c93704d75c5da 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldNoSettingsFormatter.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldNoSettingsFormatter.php
@@ -23,11 +23,11 @@ class TestFieldNoSettingsFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
       // This formatter only needs to output raw for testing.
-      $elements[$delta] = array('#markup' => $item->value);
+      $elements[$delta] = ['#markup' => $item->value];
     }
 
     return $elements;
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldPrepareViewFormatter.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldPrepareViewFormatter.php
index f7df0c0c2f07f8986abe2cb5485bf0099961e8d8..39bff8d87737ed43c087476031cce12475c70eee 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldPrepareViewFormatter.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldFormatter/TestFieldPrepareViewFormatter.php
@@ -25,22 +25,22 @@ class TestFieldPrepareViewFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'test_formatter_setting_additional' => 'dummy test string',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['test_formatter_setting_additional'] = array(
+    $element['test_formatter_setting_additional'] = [
       '#title' => t('Setting'),
       '#type' => 'textfield',
       '#size' => 20,
       '#default_value' => $this->getSetting('test_formatter_setting_additional'),
       '#required' => TRUE,
-    );
+    ];
     return $element;
   }
 
@@ -48,8 +48,8 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
-    $summary[] = t('@setting: @value', array('@setting' => 'test_formatter_setting_additional', '@value' => $this->getSetting('test_formatter_setting_additional')));
+    $summary = [];
+    $summary[] = t('@setting: @value', ['@setting' => 'test_formatter_setting_additional', '@value' => $this->getSetting('test_formatter_setting_additional')]);
     return $summary;
   }
 
@@ -71,10 +71,10 @@ public function prepareView(array $entities_items) {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
-      $elements[$delta] = array('#markup' => $this->getSetting('test_formatter_setting_additional') . '|' . $item->value . '|' . $item->additional_formatter_value);
+      $elements[$delta] = ['#markup' => $this->getSetting('test_formatter_setting_additional') . '|' . $item->value . '|' . $item->additional_formatter_value];
     }
 
     return $elements;
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldType/TestItem.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldType/TestItem.php
index 1b8822f60f45da0e66bd8167b8b1df4884130590..2f678798a2e707c414f1c55516226973744f9829 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldType/TestItem.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldType/TestItem.php
@@ -24,22 +24,22 @@ class TestItem extends FieldItemBase {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'test_field_storage_setting' => 'dummy test string',
       'changeable' => 'a changeable field storage setting',
       'unchangeable' => 'an unchangeable field storage setting',
       'translatable_storage_setting' => 'a translatable field storage setting',
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'test_field_setting' => 'dummy test string',
       'translatable_field_setting' => 'a translatable field setting',
-    ) + parent::defaultFieldSettings();
+    ] + parent::defaultFieldSettings();
   }
 
   /**
@@ -57,30 +57,30 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'int',
           'size' => 'medium',
-        ),
-      ),
-      'indexes' => array(
-        'value' => array('value'),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'value' => ['value'],
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $form['test_field_storage_setting'] = array(
+    $form['test_field_storage_setting'] = [
       '#type' => 'textfield',
       '#title' => t('Field test field storage setting'),
       '#default_value' => $this->getSetting('test_field_storage_setting'),
       '#required' => FALSE,
       '#description' => t('A dummy form element to simulate field storage setting.'),
-    );
+    ];
 
     return $form;
   }
@@ -89,13 +89,13 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
    * {@inheritdoc}
    */
   public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
-    $form['test_field_setting'] = array(
+    $form['test_field_setting'] = [
       '#type' => 'textfield',
       '#title' => t('Field test field setting'),
       '#default_value' => $this->getSetting('test_field_setting'),
       '#required' => FALSE,
       '#description' => t('A dummy form element to simulate field setting.'),
-    );
+    ];
 
     return $form;
   }
@@ -105,7 +105,7 @@ public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
    */
   public function delete() {
     // Reports that delete() method is executed for testing purposes.
-    field_test_memorize('field_test_field_delete', array($this->getEntity()));
+    field_test_memorize('field_test_field_delete', [$this->getEntity()]);
   }
 
   /**
@@ -115,14 +115,14 @@ public function getConstraints() {
     $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
     $constraints = parent::getConstraints();
 
-    $constraints[] = $constraint_manager->create('ComplexData', array(
-      'value' => array(
-        'TestField' => array(
+    $constraints[] = $constraint_manager->create('ComplexData', [
+      'value' => [
+        'TestField' => [
           'value' => -1,
-          'message' => t('%name does not accept the value @value.', array('%name' => $this->getFieldDefinition()->getLabel(), '@value' => -1)),
-        )
-      ),
-    ));
+          'message' => t('%name does not accept the value @value.', ['%name' => $this->getFieldDefinition()->getLabel(), '@value' => -1]),
+        ]
+      ],
+    ]);
 
     return $constraints;
   }
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldWidget/TestFieldWidget.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldWidget/TestFieldWidget.php
index 14a5b3ccf2ad5a0c8a2804d12b324bb35fb79d16..9dd3387e5aae7518aa08a7967281f789f37c4ca0 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldWidget/TestFieldWidget.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldWidget/TestFieldWidget.php
@@ -27,24 +27,24 @@ class TestFieldWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'test_widget_setting' => 'dummy test string',
       'role' => 'anonymous',
       'role2' => 'anonymous',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['test_widget_setting'] = array(
+    $element['test_widget_setting'] = [
       '#type' => 'textfield',
       '#title' => t('Field test field widget setting'),
       '#description' => t('A dummy form element to simulate field widget setting.'),
       '#default_value' => $this->getSetting('test_widget_setting'),
       '#required' => FALSE,
-    );
+    ];
     return $element;
   }
 
@@ -52,8 +52,8 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
-    $summary[] = t('@setting: @value', array('@setting' => 'test_widget_setting', '@value' => $this->getSetting('test_widget_setting')));
+    $summary = [];
+    $summary[] = t('@setting: @value', ['@setting' => 'test_widget_setting', '@value' => $this->getSetting('test_widget_setting')]);
     return $summary;
   }
 
@@ -61,11 +61,11 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element += array(
+    $element += [
       '#type' => 'textfield',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : '',
-    );
-    return array('value' => $element);
+    ];
+    return ['value' => $element];
   }
 
   /**
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
index 02f2d24cbe59f822294a78403798e998a962bf0c..32cf6e4c5bed7d81847fbda9e2b3def318ce87d9 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
@@ -29,22 +29,22 @@ class TestFieldWidgetMultiple extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'test_widget_setting_multiple' => 'dummy test string',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['test_widget_setting_multiple'] = array(
+    $element['test_widget_setting_multiple'] = [
       '#type' => 'textfield',
       '#title' => t('Field test field widget setting'),
       '#description' => t('A dummy form element to simulate field widget setting.'),
       '#default_value' => $this->getSetting('test_widget_setting_multiple'),
       '#required' => FALSE,
-    );
+    ];
     return $element;
   }
 
@@ -52,8 +52,8 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
-    $summary[] = t('@setting: @value', array('@setting' => 'test_widget_setting_multiple', '@value' => $this->getSetting('test_widget_setting_multiple')));
+    $summary = [];
+    $summary[] = t('@setting: @value', ['@setting' => 'test_widget_setting_multiple', '@value' => $this->getSetting('test_widget_setting_multiple')]);
     return $summary;
   }
 
@@ -61,15 +61,15 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $values = array();
+    $values = [];
     foreach ($items as $item) {
       $values[] = $item->value;
     }
-    $element += array(
+    $element += [
       '#type' => 'textfield',
       '#default_value' => implode(', ', $values),
-      '#element_validate' => array(array(get_class($this), 'multipleValidate')),
-    );
+      '#element_validate' => [[get_class($this), 'multipleValidate']],
+    ];
     return $element;
   }
 
@@ -85,9 +85,9 @@ public function errorElement(array $element, ConstraintViolationInterface $viola
    */
   public static function multipleValidate($element, FormStateInterface $form_state) {
     $values = array_map('trim', explode(',', $element['#value']));
-    $items = array();
+    $items = [];
     foreach ($values as $value) {
-      $items[] = array('value' => $value);
+      $items[] = ['value' => $value];
     }
     $form_state->setValueForElement($element, $items);
   }
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Validation/Constraint/TestFieldConstraint.php b/core/modules/field/tests/modules/field_test/src/Plugin/Validation/Constraint/TestFieldConstraint.php
index 8a511ed3e58ed392d5bc872d0fd1cb485b665152..8105a22be787dac15b0759c3305c729712db1707 100644
--- a/core/modules/field/tests/modules/field_test/src/Plugin/Validation/Constraint/TestFieldConstraint.php
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Validation/Constraint/TestFieldConstraint.php
@@ -19,7 +19,7 @@ class TestFieldConstraint extends NotEqualTo {
    * {@inheritdoc}
    */
   public function getRequiredOptions() {
-    return array('value');
+    return ['value'];
   }
 
   /**
diff --git a/core/modules/field/tests/modules/field_third_party_test/field_third_party_test.module b/core/modules/field/tests/modules/field_third_party_test/field_third_party_test.module
index 9dc2b1936304fea6d02701c5d5956cad4eb23d55..d59a0c036f9b714ce48f12f08c95d64b660e7164 100644
--- a/core/modules/field/tests/modules/field_third_party_test/field_third_party_test.module
+++ b/core/modules/field/tests/modules/field_third_party_test/field_third_party_test.module
@@ -14,11 +14,11 @@
  * Implements hook_field_widget_third_party_settings_form().
  */
 function field_third_party_test_field_widget_third_party_settings_form(WidgetInterface $plugin, FieldDefinitionInterface $field_definition, $form_mode, $form, FormStateInterface $form_state) {
-  $element['field_test_widget_third_party_settings_form'] = array(
+  $element['field_test_widget_third_party_settings_form'] = [
     '#type' => 'textfield',
     '#title' => t('3rd party widget settings form'),
     '#default_value' => $plugin->getThirdPartySetting('field_third_party_test', 'field_test_widget_third_party_settings_form'),
-  );
+  ];
   return $element;
 }
 
@@ -34,11 +34,11 @@ function field_third_party_test_field_widget_settings_summary_alter(&$summary, $
  * Implements hook_field_formatter_third_party_settings_form().
  */
 function field_third_party_test_field_formatter_third_party_settings_form(FormatterInterface $plugin, FieldDefinitionInterface $field_definition, $view_mode, $form, FormStateInterface $form_state) {
-  $element['field_test_field_formatter_third_party_settings_form'] = array(
+  $element['field_test_field_formatter_third_party_settings_form'] = [
     '#type' => 'textfield',
     '#title' => t('3rd party formatter settings form'),
     '#default_value' => $plugin->getThirdPartySetting('field_third_party_test', 'field_test_field_formatter_third_party_settings_form'),
-  );
+  ];
   return $element;
 }
 
diff --git a/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceAutoCreateTest.php b/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceAutoCreateTest.php
index b2a165520e3f153a1fc205110b29a914efbdfc44..90895b186f0d8f0ac6ea3e60f6a736ca89cd48ce 100644
--- a/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceAutoCreateTest.php
+++ b/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceAutoCreateTest.php
@@ -46,43 +46,43 @@ protected function setUp() {
     $referenced = $this->drupalCreateContentType();
     $this->referencedType = $referenced->id();
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'test_field',
       'entity_type' => 'node',
       'translatable' => FALSE,
-      'entity_types' => array(),
-      'settings' => array(
+      'entity_types' => [],
+      'settings' => [
         'target_type' => 'node',
-      ),
+      ],
       'type' => 'entity_reference',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
 
     FieldConfig::create([
       'label' => 'Entity reference field',
       'field_name' => 'test_field',
       'entity_type' => 'node',
       'bundle' => $referencing->id(),
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
-        'handler_settings' => array(
+        'handler_settings' => [
           // Reference a single vocabulary.
-          'target_bundles' => array(
+          'target_bundles' => [
             $referenced->id(),
-          ),
+          ],
           // Enable auto-create.
           'auto_create' => TRUE,
-        ),
-      ),
+        ],
+      ],
     ])->save();
 
     entity_get_display('node', $referencing->id(), 'default')
       ->setComponent('test_field')
       ->save();
     entity_get_form_display('node', $referencing->id(), 'default')
-      ->setComponent('test_field', array(
+      ->setComponent('test_field', [
         'type' => 'entity_reference_autocomplete',
-      ))
+      ])
       ->save();
 
     $account = $this->drupalCreateUser(['access content', "create $this->referencingType content"]);
@@ -109,10 +109,10 @@ public function testAutoCreate() {
     $result = $query->execute();
     $this->assertFalse($result, 'Referenced node does not exist yet.');
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
       'test_field[0][target_id]' => $new_title,
-    );
+    ];
     $this->drupalPostForm("node/add/$this->referencingType", $edit, 'Save');
 
     // Assert referenced node was created.
diff --git a/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceFieldDefaultValueTest.php b/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceFieldDefaultValueTest.php
index 5af26f12467461704ce5df295e11ee5462466442..2f55cd54c30a25f227fd71bc3a79b8db85ba79a1 100644
--- a/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceFieldDefaultValueTest.php
+++ b/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceFieldDefaultValueTest.php
@@ -36,11 +36,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create default content type.
-    $this->drupalCreateContentType(array('type' => 'reference_content'));
-    $this->drupalCreateContentType(array('type' => 'referenced_content'));
+    $this->drupalCreateContentType(['type' => 'reference_content']);
+    $this->drupalCreateContentType(['type' => 'referenced_content']);
 
     // Create admin user.
-    $this->adminUser = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node fields', 'administer node form display', 'bypass node access'));
+    $this->adminUser = $this->drupalCreateUser(['access content', 'administer content types', 'administer node fields', 'administer node form display', 'bypass node access']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -49,33 +49,33 @@ protected function setUp() {
    */
   function testEntityReferenceDefaultValue() {
     // Create a node to be referenced.
-    $referenced_node = $this->drupalCreateNode(array('type' => 'referenced_content'));
+    $referenced_node = $this->drupalCreateNode(['type' => 'referenced_content']);
 
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'type' => 'entity_reference',
-      'settings' => array('target_type' => 'node'),
-    ));
+      'settings' => ['target_type' => 'node'],
+    ]);
     $field_storage->save();
     $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'reference_content',
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
-        'handler_settings' => array(
-          'target_bundles' => array('referenced_content'),
-          'sort' => array('field' => '_none'),
-        ),
-      ),
+        'handler_settings' => [
+          'target_bundles' => ['referenced_content'],
+          'sort' => ['field' => '_none'],
+        ],
+      ],
     ]);
     $field->save();
 
     // Set created node as default_value.
-    $field_edit = array(
+    $field_edit = [
       'default_value_input[' . $field_name . '][0][target_id]' => $referenced_node->getTitle() . ' (' . $referenced_node->id() . ')',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/reference_content/fields/node.reference_content.' . $field_name, $field_edit, t('Save settings'));
 
     // Check that default value is selected in default value form.
@@ -88,7 +88,7 @@ function testEntityReferenceDefaultValue() {
     $this->assertEqual($config_entity['default_value'][0]['target_uuid'], $referenced_node->uuid(), 'Content uuid and config entity uuid are the same');
     // Ensure the configuration has the expected dependency on the entity that
     // is being used a default value.
-    $this->assertEqual(array($referenced_node->getConfigDependencyName()), $config_entity['dependencies']['content']);
+    $this->assertEqual([$referenced_node->getConfigDependencyName()], $config_entity['dependencies']['content']);
 
     // Clear field definitions cache in order to avoid stale cache values.
     \Drupal::entityManager()->clearCachedFieldDefinitions();
@@ -111,35 +111,35 @@ function testEntityReferenceDefaultValue() {
    */
   function testEntityReferenceDefaultConfigValue() {
     // Create a node to be referenced.
-    $referenced_node_type = $this->drupalCreateContentType(array('type' => 'referenced_config_to_delete'));
-    $referenced_node_type2 = $this->drupalCreateContentType(array('type' => 'referenced_config_to_preserve'));
+    $referenced_node_type = $this->drupalCreateContentType(['type' => 'referenced_config_to_delete']);
+    $referenced_node_type2 = $this->drupalCreateContentType(['type' => 'referenced_config_to_preserve']);
 
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'type' => 'entity_reference',
-      'settings' => array('target_type' => 'node_type'),
+      'settings' => ['target_type' => 'node_type'],
       'cardinality' => FieldStorageConfig::CARDINALITY_UNLIMITED,
-    ));
+    ]);
     $field_storage->save();
     $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'reference_content',
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
-        'handler_settings' => array(
-          'sort' => array('field' => '_none'),
-        ),
-      ),
+        'handler_settings' => [
+          'sort' => ['field' => '_none'],
+        ],
+      ],
     ]);
     $field->save();
 
     // Set created node as default_value.
-    $field_edit = array(
+    $field_edit = [
       'default_value_input[' . $field_name . '][0][target_id]' => $referenced_node_type->label() . ' (' . $referenced_node_type->id() . ')',
       'default_value_input[' . $field_name . '][1][target_id]' => $referenced_node_type2->label() . ' (' . $referenced_node_type2->id() . ')',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/reference_content/fields/node.reference_content.' . $field_name, $field_edit, t('Save settings'));
 
     // Check that the field has a dependency on the default value.
diff --git a/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceFieldTranslatedReferenceViewTest.php b/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceFieldTranslatedReferenceViewTest.php
index 52dde091dddd697959e6c83f1b53f1d6474c12ff..889bd1aca0db615ba253dfb2ccc00be09d07b1d7 100644
--- a/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceFieldTranslatedReferenceViewTest.php
+++ b/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceFieldTranslatedReferenceViewTest.php
@@ -111,11 +111,11 @@ class EntityReferenceFieldTranslatedReferenceViewTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'language',
     'content_translation',
     'node',
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
@@ -203,20 +203,20 @@ protected function enableTranslation() {
    * Adds term reference field for the article content type.
    */
   protected function setUpEntityReferenceField() {
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->referenceFieldName,
       'entity_type' => $this->testEntityTypeName,
       'type' => 'entity_reference',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
       'translatable' => $this->translatable,
-      'settings' => array(
-        'allowed_values' => array(
-          array(
+      'settings' => [
+        'allowed_values' => [
+          [
             'target_type' => $this->testEntityTypeName,
-          ),
-        ),
-      ),
-    ))->save();
+          ],
+        ],
+      ],
+    ])->save();
 
     FieldConfig::create([
       'field_name' => $this->referenceFieldName,
@@ -225,14 +225,14 @@ protected function setUpEntityReferenceField() {
     ])
       ->save();
     entity_get_form_display($this->testEntityTypeName, $this->referrerType->id(), 'default')
-      ->setComponent($this->referenceFieldName, array(
+      ->setComponent($this->referenceFieldName, [
         'type' => 'entity_reference_autocomplete',
-      ))
+      ])
       ->save();
     entity_get_display($this->testEntityTypeName, $this->referrerType->id(), 'default')
-      ->setComponent($this->referenceFieldName, array(
+      ->setComponent($this->referenceFieldName, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
   }
 
@@ -240,14 +240,14 @@ protected function setUpEntityReferenceField() {
    * Create content types.
    */
   protected function setUpContentTypes() {
-    $this->referrerType = $this->drupalCreateContentType(array(
+    $this->referrerType = $this->drupalCreateContentType([
         'type' => 'referrer',
         'name' => 'Referrer',
-      ));
-    $this->referencedType = $this->drupalCreateContentType(array(
+      ]);
+    $this->referencedType = $this->drupalCreateContentType([
         'type' => 'referenced_page',
         'name' => 'Referenced Page',
-      ));
+      ]);
   }
 
   /**
@@ -255,19 +255,19 @@ protected function setUpContentTypes() {
    */
   protected function createReferencedEntityWithTranslation() {
     /** @var \Drupal\node\Entity\Node $node */
-    $node = entity_create($this->testEntityTypeName, array(
+    $node = entity_create($this->testEntityTypeName, [
       'title' => $this->originalLabel,
       'type' => $this->referencedType->id(),
-      'description' => array(
+      'description' => [
         'value' => $this->randomMachineName(),
         'format' => 'basic_html',
-      ),
+      ],
       'langcode' => $this->baseLangcode,
-    ));
+    ]);
     $node->save();
-    $node->addTranslation($this->translateToLangcode, array(
+    $node->addTranslation($this->translateToLangcode, [
       'title' => $this->translatedLabel,
-    ));
+    ]);
     $node->save();
 
     return $node;
@@ -279,15 +279,15 @@ protected function createReferencedEntityWithTranslation() {
    */
   protected function createNotTranslatedReferencedEntity() {
     /** @var \Drupal\node\Entity\Node $node */
-    $node = entity_create($this->testEntityTypeName, array(
+    $node = entity_create($this->testEntityTypeName, [
       'title' => $this->labelOfNotTranslatedReference,
       'type' => $this->referencedType->id(),
-      'description' => array(
+      'description' => [
         'value' => $this->randomMachineName(),
         'format' => 'basic_html',
-      ),
+      ],
       'langcode' => $this->baseLangcode,
-    ));
+    ]);
     $node->save();
 
     return $node;
@@ -298,19 +298,19 @@ protected function createNotTranslatedReferencedEntity() {
    */
   protected function createReferrerEntity($translatable = TRUE) {
     /** @var \Drupal\node\Entity\Node $node */
-    $node = entity_create($this->testEntityTypeName, array(
+    $node = entity_create($this->testEntityTypeName, [
       'title' => $this->randomMachineName(),
       'type' => $this->referrerType->id(),
-      'description' => array(
+      'description' => [
         'value' => $this->randomMachineName(),
         'format' => 'basic_html',
-      ),
-      $this->referenceFieldName => array(
-        array('target_id' => $this->referencedEntityWithTranslation->id()),
-        array('target_id' => $this->referencedEntityWithoutTranslation->id()),
-      ),
+      ],
+      $this->referenceFieldName => [
+        ['target_id' => $this->referencedEntityWithTranslation->id()],
+        ['target_id' => $this->referencedEntityWithoutTranslation->id()],
+      ],
       'langcode' => $this->baseLangcode,
-    ));
+    ]);
     if ($translatable) {
       $node->addTranslation($this->translateToLangcode, $node->toArray());
     }
diff --git a/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceIntegrationTest.php b/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceIntegrationTest.php
index cb54d15545cbc7a98e3bc1498c2e9e7c2e630835..56484705e1bfcbe926e5215c31e55a284e3d949f 100644
--- a/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceIntegrationTest.php
+++ b/core/modules/field/tests/src/Functional/EntityReference/EntityReferenceIntegrationTest.php
@@ -54,7 +54,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create a test user.
-    $web_user = $this->drupalCreateUser(array('administer entity_test content', 'administer entity_test fields', 'view test entity'));
+    $web_user = $this->drupalCreateUser(['administer entity_test content', 'administer entity_test fields', 'view test entity']);
     $this->drupalLogin($web_user);
   }
 
@@ -66,18 +66,18 @@ public function testSupportedEntityTypesAndWidgets() {
       $this->fieldName = 'field_test_' . $referenced_entities[0]->getEntityTypeId();
 
       // Create an Entity reference field.
-      $this->createEntityReferenceField($this->entityType, $this->bundle, $this->fieldName, $this->fieldName, $referenced_entities[0]->getEntityTypeId(), 'default', array(), 2);
+      $this->createEntityReferenceField($this->entityType, $this->bundle, $this->fieldName, $this->fieldName, $referenced_entities[0]->getEntityTypeId(), 'default', [], 2);
 
       // Test the default 'entity_reference_autocomplete' widget.
       entity_get_form_display($this->entityType, $this->bundle, 'default')->setComponent($this->fieldName)->save();
 
       $entity_name = $this->randomMachineName();
-      $edit = array(
+      $edit = [
         'name[0][value]' => $entity_name,
         $this->fieldName . '[0][target_id]' => $referenced_entities[0]->label() . ' (' . $referenced_entities[0]->id() . ')',
         // Test an input of the entity label without a ' (entity_id)' suffix.
         $this->fieldName . '[1][target_id]' => $referenced_entities[1]->label(),
-      );
+      ];
       $this->drupalPostForm($this->entityType . '/add', $edit, t('Save'));
       $this->assertFieldValues($entity_name, $referenced_entities);
 
@@ -90,22 +90,22 @@ public function testSupportedEntityTypesAndWidgets() {
       $this->assertFieldByName($this->fieldName . '[0][target_id]', $referenced_entities[0]->label() . ' (' . $referenced_entities[0]->id() . ')');
       $this->assertFieldByName($this->fieldName . '[1][target_id]', $referenced_entities[1]->label() . ' (' . $referenced_entities[1]->id() . ')');
 
-      $this->drupalPostForm(NULL, array(), t('Save'));
+      $this->drupalPostForm(NULL, [], t('Save'));
       $this->assertFieldValues($entity_name, $referenced_entities);
 
       // Test the 'entity_reference_autocomplete_tags' widget.
-      entity_get_form_display($this->entityType, $this->bundle, 'default')->setComponent($this->fieldName, array(
+      entity_get_form_display($this->entityType, $this->bundle, 'default')->setComponent($this->fieldName, [
         'type' => 'entity_reference_autocomplete_tags',
-      ))->save();
+      ])->save();
 
       $entity_name = $this->randomMachineName();
       $target_id = $referenced_entities[0]->label() . ' (' . $referenced_entities[0]->id() . ')';
       // Test an input of the entity label without a ' (entity_id)' suffix.
       $target_id .= ', ' . $referenced_entities[1]->label();
-      $edit = array(
+      $edit = [
         'name[0][value]' => $entity_name,
         $this->fieldName . '[target_id]' => $target_id,
-      );
+      ];
       $this->drupalPostForm($this->entityType . '/add', $edit, t('Save'));
       $this->assertFieldValues($entity_name, $referenced_entities);
 
@@ -115,23 +115,23 @@ public function testSupportedEntityTypesAndWidgets() {
       $this->drupalGet($this->entityType . '/manage/' . $entity->id() . '/edit');
       $this->assertFieldByName($this->fieldName . '[target_id]', $target_id . ' (' . $referenced_entities[1]->id() . ')');
 
-      $this->drupalPostForm(NULL, array(), t('Save'));
+      $this->drupalPostForm(NULL, [], t('Save'));
       $this->assertFieldValues($entity_name, $referenced_entities);
 
       // Test all the other widgets supported by the entity reference field.
       // Since we don't know the form structure for these widgets, just test
       // that editing and saving an already created entity works.
-      $exclude = array('entity_reference_autocomplete', 'entity_reference_autocomplete_tags');
+      $exclude = ['entity_reference_autocomplete', 'entity_reference_autocomplete_tags'];
       $entity = current($storage->loadByProperties(['name' => $entity_name]));
       $supported_widgets = \Drupal::service('plugin.manager.field.widget')->getOptions('entity_reference');
       $supported_widget_types = array_diff(array_keys($supported_widgets), $exclude);
 
       foreach ($supported_widget_types as $widget_type) {
-        entity_get_form_display($this->entityType, $this->bundle, 'default')->setComponent($this->fieldName, array(
+        entity_get_form_display($this->entityType, $this->bundle, 'default')->setComponent($this->fieldName, [
           'type' => $widget_type,
-        ))->save();
+        ])->save();
 
-        $this->drupalPostForm($this->entityType . '/manage/' . $entity->id() . '/edit', array(), t('Save'));
+        $this->drupalPostForm($this->entityType . '/manage/' . $entity->id() . '/edit', [], t('Save'));
         $this->assertFieldValues($entity_name, $referenced_entities);
       }
 
@@ -139,9 +139,9 @@ public function testSupportedEntityTypesAndWidgets() {
       entity_get_form_display($this->entityType, $this->bundle, 'default')->setComponent($this->fieldName)->save();
 
       // Set first entity as the default_value.
-      $field_edit = array(
+      $field_edit = [
         'default_value_input[' . $this->fieldName . '][0][target_id]' => $referenced_entities[0]->label() . ' (' . $referenced_entities[0]->id() . ')',
-      );
+      ];
       if ($key == 'content') {
         $field_edit['settings[handler_settings][target_bundles][' . $referenced_entities[0]->getEntityTypeId() . ']'] = TRUE;
       }
@@ -179,7 +179,7 @@ protected function assertFieldValues($entity_name, $referenced_entities) {
     $entity = current($this->container->get('entity_type.manager')->getStorage(
     $this->entityType)->loadByProperties(['name' => $entity_name]));
 
-    $this->assertTrue($entity, format_string('%entity_type: Entity found in the database.', array('%entity_type' => $this->entityType)));
+    $this->assertTrue($entity, format_string('%entity_type: Entity found in the database.', ['%entity_type' => $this->entityType]));
 
     $this->assertEqual($entity->{$this->fieldName}->target_id, $referenced_entities[0]->id());
     $this->assertEqual($entity->{$this->fieldName}->entity->id(), $referenced_entities[0]->id());
@@ -197,26 +197,26 @@ protected function assertFieldValues($entity_name, $referenced_entities) {
    *   An array of entity objects.
    */
   protected function getTestEntities() {
-    $config_entity_1 = entity_create('config_test', array('id' => $this->randomMachineName(), 'label' => $this->randomMachineName()));
+    $config_entity_1 = entity_create('config_test', ['id' => $this->randomMachineName(), 'label' => $this->randomMachineName()]);
     $config_entity_1->save();
-    $config_entity_2 = entity_create('config_test', array('id' => $this->randomMachineName(), 'label' => $this->randomMachineName()));
+    $config_entity_2 = entity_create('config_test', ['id' => $this->randomMachineName(), 'label' => $this->randomMachineName()]);
     $config_entity_2->save();
 
-    $content_entity_1 = EntityTest::create(array('name' => $this->randomMachineName()));
+    $content_entity_1 = EntityTest::create(['name' => $this->randomMachineName()]);
     $content_entity_1->save();
-    $content_entity_2 = EntityTest::create(array('name' => $this->randomMachineName()));
+    $content_entity_2 = EntityTest::create(['name' => $this->randomMachineName()]);
     $content_entity_2->save();
 
-    return array(
-      'config' => array(
+    return [
+      'config' => [
         $config_entity_1,
         $config_entity_2,
-      ),
-      'content' => array(
+      ],
+      'content' => [
         $content_entity_1,
         $content_entity_2,
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/field/tests/src/Functional/EntityReference/Views/SelectionTest.php b/core/modules/field/tests/src/Functional/EntityReference/Views/SelectionTest.php
index 4ccf8cfcf6912843219f93bf67b046d8144c0218..cfb5ecf084583ea08e01f171d768a71f4db9f4c3 100644
--- a/core/modules/field/tests/src/Functional/EntityReference/Views/SelectionTest.php
+++ b/core/modules/field/tests/src/Functional/EntityReference/Views/SelectionTest.php
@@ -21,7 +21,7 @@ class SelectionTest extends BrowserTestBase {
    *
    * @var array
    */
-  protected $nodes = array();
+  protected $nodes = [];
 
   /**
    * The entity reference field to test.
@@ -38,39 +38,39 @@ protected function setUp() {
 
     // Create nodes.
     $type = $this->drupalCreateContentType()->id();
-    $node1 = $this->drupalCreateNode(array('type' => $type));
-    $node2 = $this->drupalCreateNode(array('type' => $type));
+    $node1 = $this->drupalCreateNode(['type' => $type]);
+    $node2 = $this->drupalCreateNode(['type' => $type]);
     $node3 = $this->drupalCreateNode();
 
-    foreach (array($node1, $node2, $node3) as $node) {
+    foreach ([$node1, $node2, $node3] as $node) {
       $this->nodes[$node->getType()][$node->id()] = $node->label();
     }
 
     // Create a field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'test_field',
       'entity_type' => 'entity_test',
       'translatable' => FALSE,
-      'settings' => array(
+      'settings' => [
         'target_type' => 'node',
-      ),
+      ],
       'type' => 'entity_reference',
       'cardinality' => '1',
-    ));
+    ]);
     $field_storage->save();
     $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'test_bundle',
-      'settings' => array(
+      'settings' => [
         'handler' => 'views',
-        'handler_settings' => array(
-          'view' => array(
+        'handler_settings' => [
+          'view' => [
             'view_name' => 'test_entity_reference',
             'display_name' => 'entity_reference_1',
-            'arguments' => array(),
-          ),
-        ),
-      ),
+            'arguments' => [],
+          ],
+        ],
+      ],
     ]);
     $field->save();
     $this->field = $field;
@@ -112,23 +112,23 @@ public function testSelectionHandlerRelationship() {
     // Add a relationship to the view.
     $view = Views::getView('test_entity_reference');
     $view->setDisplay();
-    $view->displayHandlers->get('default')->setOption('relationships', array(
-      'test_relationship' => array(
+    $view->displayHandlers->get('default')->setOption('relationships', [
+      'test_relationship' => [
         'id' => 'uid',
         'table' => 'node_field_data',
         'field' => 'uid',
-      ),
-    ));
+      ],
+    ]);
 
     // Add a filter depending on the relationship to the test view.
-    $view->displayHandlers->get('default')->setOption('filters', array(
-      'uid' => array(
+    $view->displayHandlers->get('default')->setOption('filters', [
+      'uid' => [
         'id' => 'uid',
         'table' => 'users_field_data',
         'field' => 'uid',
         'relationship' => 'test_relationship',
-      )
-    ));
+      ]
+    ]);
 
     // Set view to distinct so only one row per node is returned.
     $query_options = $view->display_handler->getOption('query');
diff --git a/core/modules/field/tests/src/Functional/FieldAccessTest.php b/core/modules/field/tests/src/Functional/FieldAccessTest.php
index a9af8366863638e79f17ad92a3999350df577487..36f0ef97997cdbc578555360723ed7e66af044e5 100644
--- a/core/modules/field/tests/src/Functional/FieldAccessTest.php
+++ b/core/modules/field/tests/src/Functional/FieldAccessTest.php
@@ -17,7 +17,7 @@ class FieldAccessTest extends FieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_test');
+  public static $modules = ['node', 'field_test'];
 
   /**
    * Node entity to use in this test.
@@ -36,28 +36,28 @@ class FieldAccessTest extends FieldTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $web_user = $this->drupalCreateUser(array('view test_view_field content'));
+    $web_user = $this->drupalCreateUser(['view test_view_field content']);
     $this->drupalLogin($web_user);
 
     // Create content type.
     $content_type_info = $this->drupalCreateContentType();
     $content_type = $content_type_info->id();
 
-    $field_storage = array(
+    $field_storage = [
       'field_name' => 'test_view_field',
       'entity_type' => 'node',
       'type' => 'text',
-    );
+    ];
     FieldStorageConfig::create($field_storage)->save();
-    $field = array(
+    $field = [
       'field_name' => $field_storage['field_name'],
       'entity_type' => 'node',
       'bundle' => $content_type,
-    );
+    ];
     FieldConfig::create($field)->save();
 
     // Assign display properties for the 'default' and 'teaser' view modes.
-    foreach (array('default', 'teaser') as $view_mode) {
+    foreach (['default', 'teaser'] as $view_mode) {
       entity_get_display('node', $content_type, $view_mode)
         ->setComponent($field_storage['field_name'])
         ->save();
@@ -65,10 +65,10 @@ protected function setUp() {
 
     // Create test node.
     $this->testViewFieldValue = 'This is some text';
-    $settings = array();
+    $settings = [];
     $settings['type'] = $content_type;
     $settings['title'] = 'Field view access test';
-    $settings['test_view_field'] = array(array('value' => $this->testViewFieldValue));
+    $settings['test_view_field'] = [['value' => $this->testViewFieldValue]];
     $this->node = $this->drupalCreateNode($settings);
   }
 
diff --git a/core/modules/field/tests/src/Functional/FieldHelpTest.php b/core/modules/field/tests/src/Functional/FieldHelpTest.php
index 76affaae356881d6dc8941db3fde26cab19ccc65..9a6ff6782099c65edb2a495e8a97468647aab8e6 100644
--- a/core/modules/field/tests/src/Functional/FieldHelpTest.php
+++ b/core/modules/field/tests/src/Functional/FieldHelpTest.php
@@ -16,7 +16,7 @@ class FieldHelpTest extends BrowserTestBase {
    *
    * @var array.
    */
-  public static $modules = array('field', 'help');
+  public static $modules = ['field', 'help'];
 
   // Tests field help implementation without optional core modules enabled.
   protected $profile = 'minimal';
@@ -30,7 +30,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create the admin user.
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'view the administration theme'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'view the administration theme']);
   }
 
   /**
@@ -44,7 +44,7 @@ public function testFieldHelp() {
     $this->drupalGet('admin/help/field');
 
     // Enable the Options, Email and Field API Test modules.
-    \Drupal::service('module_installer')->install(array('options', 'field_test'));
+    \Drupal::service('module_installer')->install(['options', 'field_test']);
     $this->resetAll();
     \Drupal::service('plugin.manager.field.widget')->clearCachedDefinitions();
     \Drupal::service('plugin.manager.field.field_type')->clearCachedDefinitions();
diff --git a/core/modules/field/tests/src/Functional/FieldTestBase.php b/core/modules/field/tests/src/Functional/FieldTestBase.php
index 40cffac225cfedc6af5c69fb51cb9afe705d0cf1..108d5f5d7cd5f367a66ec32adaf5ad31daa6e661 100644
--- a/core/modules/field/tests/src/Functional/FieldTestBase.php
+++ b/core/modules/field/tests/src/Functional/FieldTestBase.php
@@ -20,7 +20,7 @@ abstract class FieldTestBase extends BrowserTestBase {
    *   An array of random values, in the format expected for field values.
    */
   function _generateTestFieldValues($cardinality) {
-    $values = array();
+    $values = [];
     for ($i = 0; $i < $cardinality; $i++) {
       // field_test fields treat 0 as 'empty value'.
       $values[$i]['value'] = mt_rand(1, 127);
@@ -58,7 +58,7 @@ function assertFieldValues(EntityInterface $entity, $field_name, $expected_value
     $values = $field->getValue();
     $this->assertEqual(count($values), count($expected_values), 'Expected number of values were saved.');
     foreach ($expected_values as $key => $value) {
-      $this->assertEqual($values[$key][$column], $value, format_string('Value @value was saved correctly.', array('@value' => $value)));
+      $this->assertEqual($values[$key][$column], $value, format_string('Value @value was saved correctly.', ['@value' => $value]));
     }
   }
 
diff --git a/core/modules/field/tests/src/Functional/TranslationWebTest.php b/core/modules/field/tests/src/Functional/TranslationWebTest.php
index 3e0f849e31257ef085f6a0f65ae6a591941ef57e..e09e5851ba9fa98f9d8ea1856d1ae8487bc601a6 100644
--- a/core/modules/field/tests/src/Functional/TranslationWebTest.php
+++ b/core/modules/field/tests/src/Functional/TranslationWebTest.php
@@ -19,7 +19,7 @@ class TranslationWebTest extends FieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'field_test', 'entity_test');
+  public static $modules = ['language', 'field_test', 'entity_test'];
 
   /**
    * The name of the field to use in this test.
@@ -54,19 +54,19 @@ protected function setUp() {
 
     $this->fieldName = Unicode::strtolower($this->randomMachineName() . '_field_name');
 
-    $field_storage = array(
+    $field_storage = [
       'field_name' => $this->fieldName,
       'entity_type' => $this->entityTypeId,
       'type' => 'test_field',
       'cardinality' => 4,
-    );
+    ];
     FieldStorageConfig::create($field_storage)->save();
     $this->fieldStorage = FieldStorageConfig::load($this->entityTypeId . '.' . $this->fieldName);
 
-    $field = array(
+    $field = [
       'field_storage' => $this->fieldStorage,
       'bundle' => $this->entityTypeId,
-    );
+    ];
     FieldConfig::create($field)->save();
     $this->field = FieldConfig::load($this->entityTypeId . '.' . $field['bundle'] . '.' . $this->fieldName);
 
@@ -75,10 +75,10 @@ protected function setUp() {
       ->save();
 
     for ($i = 0; $i < 3; ++$i) {
-      ConfigurableLanguage::create(array(
+      ConfigurableLanguage::create([
         'id' => 'l' . $i,
         'label' => $this->randomString(),
-      ))->save();
+      ])->save();
     }
   }
 
@@ -86,7 +86,7 @@ protected function setUp() {
    * Tests field translations when creating a new revision.
    */
   function testFieldFormTranslationRevisions() {
-    $web_user = $this->drupalCreateUser(array('view test entity', 'administer entity_test content'));
+    $web_user = $this->drupalCreateUser(['view test entity', 'administer entity_test content']);
     $this->drupalLogin($web_user);
 
     // Prepare the field translations.
@@ -107,10 +107,10 @@ function testFieldFormTranslationRevisions() {
     $entity->save();
 
     // Create a new revision.
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $entity->{$field_name}->value,
       'revision' => TRUE,
-    );
+    ];
     $this->drupalPostForm($this->entityTypeId . '/manage/' . $entity->id() . '/edit', $edit, t('Save'));
 
     // Check translation revisions.
@@ -129,7 +129,7 @@ private function checkTranslationRevisions($id, $revision_id, $available_langcod
       ->loadRevision($revision_id);
     foreach ($available_langcodes as $langcode => $value) {
       $passed = $entity->getTranslation($langcode)->{$field_name}->value == $value + 1;
-      $this->assertTrue($passed, format_string('The @language translation for revision @revision was correctly stored', array('@language' => $langcode, '@revision' => $entity->getRevisionId())));
+      $this->assertTrue($passed, format_string('The @language translation for revision @revision was correctly stored', ['@language' => $langcode, '@revision' => $entity->getRevisionId()]));
     }
   }
 
diff --git a/core/modules/field/tests/src/Kernel/Boolean/BooleanItemTest.php b/core/modules/field/tests/src/Kernel/Boolean/BooleanItemTest.php
index cb8b501a0e0e48e05640e9541e1f778a7ed39485..37acab86c2ddffd678581bedeab33bd9fe5f5ccd 100644
--- a/core/modules/field/tests/src/Kernel/Boolean/BooleanItemTest.php
+++ b/core/modules/field/tests/src/Kernel/Boolean/BooleanItemTest.php
@@ -23,11 +23,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create a boolean field and storage for validation.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_boolean',
       'entity_type' => 'entity_test',
       'type' => 'boolean',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_boolean',
@@ -36,9 +36,9 @@ protected function setUp() {
 
     // Create a form display for the default form mode.
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent('field_boolean', array(
+      ->setComponent('field_boolean', [
         'type' => 'boolean_checkbox',
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/field/tests/src/Kernel/BulkDeleteTest.php b/core/modules/field/tests/src/Kernel/BulkDeleteTest.php
index b01926ad8797ac307d3b8f72662f73fa033eb1b7..f0497d64a65f14e4d76f07618a66d69cd1db28dc 100644
--- a/core/modules/field/tests/src/Kernel/BulkDeleteTest.php
+++ b/core/modules/field/tests/src/Kernel/BulkDeleteTest.php
@@ -90,31 +90,31 @@ function checkHooksInvocations($expected_hooks, $actual_hooks) {
   protected function setUp() {
     parent::setUp();
 
-    $this->fieldStorages = array();
-    $this->entities = array();
-    $this->entitiesByBundles = array();
+    $this->fieldStorages = [];
+    $this->entities = [];
+    $this->entitiesByBundles = [];
 
     // Create two bundles.
-    $this->bundles = array('bb_1' => 'bb_1', 'bb_2' => 'bb_2');
+    $this->bundles = ['bb_1' => 'bb_1', 'bb_2' => 'bb_2'];
     foreach ($this->bundles as $name => $desc) {
       entity_test_create_bundle($name, $desc);
     }
 
     // Create two field storages.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'bf_1',
       'entity_type' => $this->entityTypeId,
       'type' => 'test_field',
       'cardinality' => 1
-    ));
+    ]);
     $field_storage->save();
     $this->fieldStorages[] = $field_storage;
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'bf_2',
       'entity_type' => $this->entityTypeId,
       'type' => 'test_field',
       'cardinality' => 4
-    ));
+    ]);
     $field_storage->save();
     $this->fieldStorages[] = $field_storage;
 
@@ -130,7 +130,7 @@ protected function setUp() {
       for ($i = 0; $i < 10; $i++) {
         $entity = $this->container->get('entity_type.manager')
           ->getStorage($this->entityTypeId)
-          ->create(array('type' => $bundle));
+          ->create(['type' => $bundle]);
         foreach ($this->fieldStorages as $field_storage) {
           $entity->{$field_storage->getName()}->setValue($this->_generateTestFieldValues($field_storage->getCardinality()));
         }
@@ -175,7 +175,7 @@ function testDeleteField() {
     $field->delete();
 
     // The field still exists, deleted.
-    $fields = entity_load_multiple_by_properties('field_config', array('field_storage_uuid' => $field_storage->uuid(), 'deleted' => TRUE, 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['field_storage_uuid' => $field_storage->uuid(), 'deleted' => TRUE, 'include_deleted' => TRUE]);
     $this->assertEqual(count($fields), 1, 'There is one deleted field');
     $field = $fields[$field->uuid()];
     $this->assertEqual($field->getTargetBundle(), $bundle, 'The deleted field is for the correct bundle');
@@ -218,12 +218,12 @@ public function testPurgeWithDeletedAndActiveField() {
     $bundle = reset($this->bundles);
     // Create another field storage.
     $field_name = 'bf_3';
-    $deleted_field_storage = FieldStorageConfig::create(array(
+    $deleted_field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => $this->entityTypeId,
       'type' => 'test_field',
       'cardinality' => 1
-    ));
+    ]);
     $deleted_field_storage->save();
     // Create the field.
     FieldConfig::create([
@@ -234,7 +234,7 @@ public function testPurgeWithDeletedAndActiveField() {
     for ($i = 0; $i < 20; $i++) {
       $entity = $this->container->get('entity_type.manager')
         ->getStorage($this->entityTypeId)
-        ->create(array('type' => $bundle));
+        ->create(['type' => $bundle]);
       $entity->{$field_name}->setValue($this->_generateTestFieldValues(1));
       $entity->save();
     }
@@ -245,16 +245,16 @@ public function testPurgeWithDeletedAndActiveField() {
     $deleted_field_uuid = $deleted_field->uuid();
 
     // Reload the field storage.
-    $field_storages = entity_load_multiple_by_properties('field_storage_config', array('uuid' => $deleted_field_storage->uuid(), 'include_deleted' => TRUE));
+    $field_storages = entity_load_multiple_by_properties('field_storage_config', ['uuid' => $deleted_field_storage->uuid(), 'include_deleted' => TRUE]);
     $deleted_field_storage = reset($field_storages);
 
     // Create the field again.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => $this->entityTypeId,
       'type' => 'test_field',
       'cardinality' => 1
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -262,14 +262,14 @@ public function testPurgeWithDeletedAndActiveField() {
     ])->save();
 
     // The field still exists, deleted, with the same field name.
-    $fields = entity_load_multiple_by_properties('field_config', array('uuid' => $deleted_field_uuid, 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['uuid' => $deleted_field_uuid, 'include_deleted' => TRUE]);
     $this->assertTrue(isset($fields[$deleted_field_uuid]) && $fields[$deleted_field_uuid]->isDeleted(), 'The field exists and is deleted');
     $this->assertTrue(isset($fields[$deleted_field_uuid]) && $fields[$deleted_field_uuid]->getName() == $field_name);
 
     for ($i = 0; $i < 10; $i++) {
       $entity = $this->container->get('entity_type.manager')
         ->getStorage($this->entityTypeId)
-        ->create(array('type' => $bundle));
+        ->create(['type' => $bundle]);
       $entity->{$field_name}->setValue($this->_generateTestFieldValues(1));
       $entity->save();
     }
@@ -289,13 +289,13 @@ public function testPurgeWithDeletedAndActiveField() {
     $this->assertFalse(\Drupal::database()->schema()->tableExists($deleted_table_name));
 
     // The field has been removed from the system.
-    $fields = entity_load_multiple_by_properties('field_config', array('field_storage_uuid' => $deleted_field_storage->uuid(), 'deleted' => TRUE, 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['field_storage_uuid' => $deleted_field_storage->uuid(), 'deleted' => TRUE, 'include_deleted' => TRUE]);
     $this->assertEqual(count($fields), 0, 'The field is gone');
 
     // Verify there are still 10 entries in the main table.
     $count = \Drupal::database()
       ->select('entity_test__' . $field_name, 'f')
-      ->fields('f', array('entity_id'))
+      ->fields('f', ['entity_id'])
       ->condition('bundle', $bundle)
       ->countQuery()
       ->execute()
@@ -340,7 +340,7 @@ function testPurgeField() {
     // FieldItemInterface::delete() should have been called once for each entity in the
     // bundle.
     $actual_hooks = field_test_memorize();
-    $hooks = array();
+    $hooks = [];
     $entities = $this->entitiesByBundles[$bundle];
     foreach ($entities as $id => $entity) {
       $hooks['field_test_field_delete'][] = $entity;
@@ -348,19 +348,19 @@ function testPurgeField() {
     $this->checkHooksInvocations($hooks, $actual_hooks);
 
     // The field still exists, deleted.
-    $fields = entity_load_multiple_by_properties('field_config', array('field_storage_uuid' => $field_storage->uuid(), 'deleted' => TRUE, 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['field_storage_uuid' => $field_storage->uuid(), 'deleted' => TRUE, 'include_deleted' => TRUE]);
     $this->assertEqual(count($fields), 1, 'There is one deleted field');
 
     // Purge the field.
     field_purge_batch($batch_size);
 
     // The field is gone.
-    $fields = entity_load_multiple_by_properties('field_config', array('field_storage_uuid' => $field_storage->uuid(), 'deleted' => TRUE, 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['field_storage_uuid' => $field_storage->uuid(), 'deleted' => TRUE, 'include_deleted' => TRUE]);
     $this->assertEqual(count($fields), 0, 'The field is gone');
 
     // The field storage still exists, not deleted, because it has a second
     // field.
-    $storages = entity_load_multiple_by_properties('field_storage_config', array('uuid' => $field_storage->uuid(), 'include_deleted' => TRUE));
+    $storages = entity_load_multiple_by_properties('field_storage_config', ['uuid' => $field_storage->uuid(), 'include_deleted' => TRUE]);
     $this->assertTrue(isset($storages[$field_storage->uuid()]), 'The field storage exists and is not deleted');
   }
 
@@ -391,7 +391,7 @@ function testPurgeFieldStorage() {
     // FieldItemInterface::delete() should have been called once for each entity in the
     // bundle.
     $actual_hooks = field_test_memorize();
-    $hooks = array();
+    $hooks = [];
     $entities = $this->entitiesByBundles[$bundle];
     foreach ($entities as $id => $entity) {
       $hooks['field_test_field_delete'][] = $entity;
@@ -399,17 +399,17 @@ function testPurgeFieldStorage() {
     $this->checkHooksInvocations($hooks, $actual_hooks);
 
     // The field still exists, deleted.
-    $fields = entity_load_multiple_by_properties('field_config', array('uuid' => $field->uuid(), 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['uuid' => $field->uuid(), 'include_deleted' => TRUE]);
     $this->assertTrue(isset($fields[$field->uuid()]) && $fields[$field->uuid()]->isDeleted(), 'The field exists and is deleted');
 
     // Purge again to purge the field.
     field_purge_batch(0);
 
     // The field is gone.
-    $fields = entity_load_multiple_by_properties('field_config', array('uuid' => $field->uuid(), 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['uuid' => $field->uuid(), 'include_deleted' => TRUE]);
     $this->assertEqual(count($fields), 0, 'The field is purged.');
     // The field storage still exists, not deleted.
-    $storages = entity_load_multiple_by_properties('field_storage_config', array('uuid' => $field_storage->uuid(), 'include_deleted' => TRUE));
+    $storages = entity_load_multiple_by_properties('field_storage_config', ['uuid' => $field_storage->uuid(), 'include_deleted' => TRUE]);
     $this->assertTrue(isset($storages[$field_storage->uuid()]) && !$storages[$field_storage->uuid()]->isDeleted(), 'The field storage exists and is not deleted');
 
     // Delete the second field.
@@ -426,7 +426,7 @@ function testPurgeFieldStorage() {
 
     // Check hooks invocations (same as above, for the 2nd bundle).
     $actual_hooks = field_test_memorize();
-    $hooks = array();
+    $hooks = [];
     $entities = $this->entitiesByBundles[$bundle];
     foreach ($entities as $id => $entity) {
       $hooks['field_test_field_delete'][] = $entity;
@@ -434,18 +434,18 @@ function testPurgeFieldStorage() {
     $this->checkHooksInvocations($hooks, $actual_hooks);
 
     // The field and the storage still exist, deleted.
-    $fields = entity_load_multiple_by_properties('field_config', array('uuid' => $field->uuid(), 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['uuid' => $field->uuid(), 'include_deleted' => TRUE]);
     $this->assertTrue(isset($fields[$field->uuid()]) && $fields[$field->uuid()]->isDeleted(), 'The field exists and is deleted');
-    $storages = entity_load_multiple_by_properties('field_storage_config', array('uuid' => $field_storage->uuid(), 'include_deleted' => TRUE));
+    $storages = entity_load_multiple_by_properties('field_storage_config', ['uuid' => $field_storage->uuid(), 'include_deleted' => TRUE]);
     $this->assertTrue(isset($storages[$field_storage->uuid()]) && $storages[$field_storage->uuid()]->isDeleted(), 'The field storage exists and is deleted');
 
     // Purge again to purge the field and the storage.
     field_purge_batch(0);
 
     // The field and the storage are gone.
-    $fields = entity_load_multiple_by_properties('field_config', array('uuid' => $field->uuid(), 'include_deleted' => TRUE));
+    $fields = entity_load_multiple_by_properties('field_config', ['uuid' => $field->uuid(), 'include_deleted' => TRUE]);
     $this->assertEqual(count($fields), 0, 'The field is purged.');
-    $storages = entity_load_multiple_by_properties('field_storage_config', array('uuid' => $field_storage->uuid(), 'include_deleted' => TRUE));
+    $storages = entity_load_multiple_by_properties('field_storage_config', ['uuid' => $field_storage->uuid(), 'include_deleted' => TRUE]);
     $this->assertEqual(count($storages), 0, 'The field storage is purged.');
   }
 
diff --git a/core/modules/field/tests/src/Kernel/DisplayApiTest.php b/core/modules/field/tests/src/Kernel/DisplayApiTest.php
index c1218a6805cbd0e195e6e391a79b8eca2a24225c..1072de19bc063677f402332145adcc4630b3070b 100644
--- a/core/modules/field/tests/src/Kernel/DisplayApiTest.php
+++ b/core/modules/field/tests/src/Kernel/DisplayApiTest.php
@@ -69,33 +69,33 @@ protected function setUp() {
     $this->label = $this->randomMachineName();
     $this->cardinality = 4;
 
-    $field_storage = array(
+    $field_storage = [
       'field_name' => $this->fieldName,
       'entity_type' => 'entity_test',
       'type' => 'test_field',
       'cardinality' => $this->cardinality,
-    );
-    $field = array(
+    ];
+    $field = [
       'field_name' => $this->fieldName,
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
       'label' => $this->label,
-    );
+    ];
 
-    $this->displayOptions = array(
-      'default' => array(
+    $this->displayOptions = [
+      'default' => [
         'type' => 'field_test_default',
-        'settings' => array(
+        'settings' => [
           'test_formatter_setting' => $this->randomMachineName(),
-        ),
-      ),
-      'teaser' => array(
+        ],
+      ],
+      'teaser' => [
         'type' => 'field_test_default',
-        'settings' => array(
+        'settings' => [
           'test_formatter_setting' => $this->randomMachineName(),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     FieldStorageConfig::create($field_storage)->save();
     FieldConfig::create($field)->save();
@@ -104,7 +104,7 @@ protected function setUp() {
       ->setComponent($this->fieldName, $this->displayOptions['default'])
       ->save();
     // Create a display for the teaser view mode.
-    EntityViewMode::create(array('id' => 'entity_test.teaser', 'targetEntityType' => 'entity_test'))->save();
+    EntityViewMode::create(['id' => 'entity_test.teaser', 'targetEntityType' => 'entity_test'])->save();
     entity_get_display($field['entity_type'], $field['bundle'], 'teaser')
       ->setComponent($this->fieldName, $this->displayOptions['teaser'])
       ->save();
@@ -132,66 +132,66 @@ function testFieldItemListView() {
     $setting = $settings['test_formatter_setting'];
     $this->assertText($this->label, 'Label was displayed.');
     foreach ($this->values as $delta => $value) {
-      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
 
     // Display settings: Check hidden field.
-    $display = array(
+    $display = [
       'label' => 'hidden',
       'type' => 'field_test_multiple',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting_multiple' => $this->randomMachineName(),
         'alter' => TRUE,
-      ),
-    );
+      ],
+    ];
     $build = $items->view($display);
     $this->render($build);
     $setting = $display['settings']['test_formatter_setting_multiple'];
     $this->assertNoText($this->label, 'Label was not displayed.');
     $this->assertText('field_test_entity_display_build_alter', 'Alter fired, display passed.');
     $this->assertText('entity language is en', 'Language is placed onto the context.');
-    $array = array();
+    $array = [];
     foreach ($this->values as $delta => $value) {
       $array[] = $delta . ':' . $value['value'];
     }
     $this->assertText($setting . '|' . implode('|', $array), 'Values were displayed with expected setting.');
 
     // Display settings: Check visually_hidden field.
-    $display = array(
+    $display = [
       'label' => 'visually_hidden',
       'type' => 'field_test_multiple',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting_multiple' => $this->randomMachineName(),
         'alter' => TRUE,
-      ),
-    );
+      ],
+    ];
     $build = $items->view($display);
     $this->render($build);
     $setting = $display['settings']['test_formatter_setting_multiple'];
     $this->assertRaw('visually-hidden', 'Label was visually hidden.');
     $this->assertText('field_test_entity_display_build_alter', 'Alter fired, display passed.');
     $this->assertText('entity language is en', 'Language is placed onto the context.');
-    $array = array();
+    $array = [];
     foreach ($this->values as $delta => $value) {
       $array[] = $delta . ':' . $value['value'];
     }
     $this->assertText($setting . '|' . implode('|', $array), 'Values were displayed with expected setting.');
 
     // Check the prepare_view steps are invoked.
-    $display = array(
+    $display = [
       'label' => 'hidden',
       'type' => 'field_test_with_prepare_view',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting_additional' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     $build = $items->view($display);
     $this->render($build);
     $setting = $display['settings']['test_formatter_setting_additional'];
     $this->assertNoText($this->label, 'Label was not displayed.');
     $this->assertNoText('field_test_entity_display_build_alter', 'Alter not fired.');
     foreach ($this->values as $delta => $value) {
-      $this->assertText($setting . '|' . $value['value'] . '|' . ($value['value'] + 1), format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|' . $value['value'] . '|' . ($value['value'] + 1), format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
 
     // View mode: check that display settings specified in the display object
@@ -201,7 +201,7 @@ function testFieldItemListView() {
     $setting = $this->displayOptions['teaser']['settings']['test_formatter_setting'];
     $this->assertText($this->label, 'Label was displayed.');
     foreach ($this->values as $delta => $value) {
-      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
 
     // Unknown view mode: check that display settings for 'default' view mode
@@ -211,7 +211,7 @@ function testFieldItemListView() {
     $setting = $this->displayOptions['default']['settings']['test_formatter_setting'];
     $this->assertText($this->label, 'Label was displayed.');
     foreach ($this->values as $delta => $value) {
-      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
   }
 
@@ -226,37 +226,37 @@ function testFieldItemView() {
       $item = $this->entity->{$this->fieldName}[$delta];
       $build = $item->view();
       $this->render($build);
-      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
 
     // Check that explicit display settings are used.
-    $display = array(
+    $display = [
       'type' => 'field_test_multiple',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting_multiple' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     $setting = $display['settings']['test_formatter_setting_multiple'];
     foreach ($this->values as $delta => $value) {
       $item = $this->entity->{$this->fieldName}[$delta];
       $build = $item->view($display);
       $this->render($build);
-      $this->assertText($setting . '|0:' . $value['value'], format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|0:' . $value['value'], format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
 
     // Check that prepare_view steps are invoked.
-    $display = array(
+    $display = [
       'type' => 'field_test_with_prepare_view',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting_additional' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     $setting = $display['settings']['test_formatter_setting_additional'];
     foreach ($this->values as $delta => $value) {
       $item = $this->entity->{$this->fieldName}[$delta];
       $build = $item->view($display);
       $this->render($build);
-      $this->assertText($setting . '|' . $value['value'] . '|' . ($value['value'] + 1), format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|' . $value['value'] . '|' . ($value['value'] + 1), format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
 
     // View mode: check that display settings specified in the field are used.
@@ -265,7 +265,7 @@ function testFieldItemView() {
       $item = $this->entity->{$this->fieldName}[$delta];
       $build = $item->view('teaser');
       $this->render($build);
-      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
 
     // Unknown view mode: check that display settings for 'default' view mode
@@ -275,7 +275,7 @@ function testFieldItemView() {
       $item = $this->entity->{$this->fieldName}[$delta];
       $build = $item->view('unknown_view_mode');
       $this->render($build);
-      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
+      $this->assertText($setting . '|' . $value['value'], format_string('Value @delta was displayed with expected setting.', ['@delta' => $delta]));
     }
   }
 
@@ -284,13 +284,13 @@ function testFieldItemView() {
    */
   function testFieldEmpty() {
     // Uses \Drupal\field_test\Plugin\Field\FieldFormatter\TestFieldEmptyFormatter.
-    $display = array(
+    $display = [
       'label' => 'hidden',
       'type' => 'field_empty_test',
-      'settings' => array(
+      'settings' => [
         'test_empty_string' => '**EMPTY FIELD**' . $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     // $this->entity is set by the setUp() method and by default contains 4
     // numeric values.  We only want to test the display of this one field.
     $build = $this->entity->get($this->fieldName)->view($display);
@@ -300,7 +300,7 @@ function testFieldEmpty() {
     $this->assertNoText($display['settings']['test_empty_string']);
 
     // Now remove the values from the test field and retest.
-    $this->entity->{$this->fieldName} = array();
+    $this->entity->{$this->fieldName} = [];
     $this->entity->save();
     $build = $this->entity->get($this->fieldName)->view($display);
     $this->render($build);
diff --git a/core/modules/field/tests/src/Kernel/Email/EmailItemTest.php b/core/modules/field/tests/src/Kernel/Email/EmailItemTest.php
index cd8b7acdd1bc640b8c28b7375d87807746eea211..10b44333e0758b134531a9e5f9edb94b078d6b0b 100644
--- a/core/modules/field/tests/src/Kernel/Email/EmailItemTest.php
+++ b/core/modules/field/tests/src/Kernel/Email/EmailItemTest.php
@@ -20,11 +20,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create an email field storage and field for validation.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_email',
       'entity_type' => 'entity_test',
       'type' => 'email',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_email',
@@ -33,9 +33,9 @@ protected function setUp() {
 
     // Create a form display for the default form mode.
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent('field_email', array(
+      ->setComponent('field_email', [
         'type' => 'email_default',
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/field/tests/src/Kernel/EntityReference/EntityReferenceFormatterTest.php b/core/modules/field/tests/src/Kernel/EntityReference/EntityReferenceFormatterTest.php
index da4481aefbcfd985a76804baa8460de1f7bef1a1..9c94aca946f05fb2a7794a5e6a8ab419a0c7a130 100644
--- a/core/modules/field/tests/src/Kernel/EntityReference/EntityReferenceFormatterTest.php
+++ b/core/modules/field/tests/src/Kernel/EntityReference/EntityReferenceFormatterTest.php
@@ -68,7 +68,7 @@ protected function setUp() {
     $this->config('system.theme')->set('default', 'classy')->save();
     $this->installEntitySchema('entity_test');
     // Grant the 'view test entity' permission.
-    $this->installConfig(array('user'));
+    $this->installConfig(['user']);
     Role::load(RoleInterface::ANONYMOUS_ID)
       ->grantPermission('view test entity')
       ->save();
@@ -76,16 +76,16 @@ protected function setUp() {
     // The label formatter rendering generates links, so build the router.
     $this->container->get('router.builder')->rebuild();
 
-    $this->createEntityReferenceField($this->entityType, $this->bundle, $this->fieldName, 'Field test', $this->entityType, 'default', array(), FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
+    $this->createEntityReferenceField($this->entityType, $this->bundle, $this->fieldName, 'Field test', $this->entityType, 'default', [], FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     // Set up a field, so that the entity that'll be referenced bubbles up a
     // cache tag when rendering it entirely.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'body',
       'entity_type' => $this->entityType,
       'type' => 'text',
-      'settings' => array(),
-    ))->save();
+      'settings' => [],
+    ])->save();
     FieldConfig::create([
       'entity_type' => $this->entityType,
       'bundle' => $this->bundle,
@@ -93,35 +93,35 @@ protected function setUp() {
       'label' => 'Body',
     ])->save();
     entity_get_display($this->entityType, $this->bundle, 'default')
-      ->setComponent('body', array(
+      ->setComponent('body', [
         'type' => 'text_default',
-        'settings' => array(),
-      ))
+        'settings' => [],
+      ])
       ->save();
 
-    FilterFormat::create(array(
+    FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
-    ))->save();
+    ])->save();
 
     // Create the entity to be referenced.
     $this->referencedEntity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => $this->randomMachineName()));
-    $this->referencedEntity->body = array(
+      ->create(['name' => $this->randomMachineName()]);
+    $this->referencedEntity->body = [
       'value' => '<p>Hello, world!</p>',
       'format' => 'full_html',
-    );
+    ];
     $this->referencedEntity->save();
 
     // Create another entity to be referenced but do not save it.
     $this->unsavedReferencedEntity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => $this->randomMachineName()));
-    $this->unsavedReferencedEntity->body = array(
+      ->create(['name' => $this->randomMachineName()]);
+    $this->unsavedReferencedEntity->body = [
       'value' => '<p>Hello, unsaved world!</p>',
       'format' => 'full_html',
-    );
+    ];
   }
 
   /**
@@ -137,7 +137,7 @@ public function testAccess() {
 
     $referencing_entity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => $this->randomMachineName()));
+      ->create(['name' => $this->randomMachineName()]);
     $referencing_entity->save();
     $referencing_entity->{$field_name}->entity = $this->referencedEntity;
 
@@ -150,16 +150,16 @@ public function testAccess() {
     foreach ($formatter_manager->getOptions('entity_reference') as $formatter => $name) {
       // Set formatter type for the 'full' view mode.
       entity_get_display($this->entityType, $this->bundle, 'default')
-        ->setComponent($field_name, array(
+        ->setComponent($field_name, [
           'type' => $formatter,
-        ))
+        ])
         ->save();
 
       // Invoke entity view.
       entity_view($referencing_entity, 'default');
 
       // Verify the un-accessible item still exists.
-      $this->assertEqual($referencing_entity->{$field_name}->target_id, $this->referencedEntity->id(), format_string('The un-accessible item still exists after @name formatter was executed.', array('@name' => $name)));
+      $this->assertEqual($referencing_entity->{$field_name}->target_id, $this->referencedEntity->id(), format_string('The un-accessible item still exists after @name formatter was executed.', ['@name' => $name]));
     }
   }
 
@@ -198,7 +198,7 @@ public function testEntityFormatter() {
     $this->assertEqual($build[0]['#markup'], 'default | ' . $this->referencedEntity->label() . $expected_rendered_name_field_1 . $expected_rendered_body_field_1, sprintf('The markup returned by the %s formatter is correct for an item with a saved entity.', $formatter));
     $expected_cache_tags = Cache::mergeTags(\Drupal::entityManager()->getViewBuilder($this->entityType)->getCacheTags(), $this->referencedEntity->getCacheTags());
     $expected_cache_tags = Cache::mergeTags($expected_cache_tags, FilterFormat::load('full_html')->getCacheTags());
-    $this->assertEqual($build[0]['#cache']['tags'], $expected_cache_tags, format_string('The @formatter formatter has the expected cache tags.', array('@formatter' => $formatter)));
+    $this->assertEqual($build[0]['#cache']['tags'], $expected_cache_tags, format_string('The @formatter formatter has the expected cache tags.', ['@formatter' => $formatter]));
 
     // Test the second field item.
     $expected_rendered_name_field_2 = '
@@ -338,37 +338,37 @@ public function testLabelFormatter() {
       'max-age' => Cache::PERMANENT,
     ];
     $this->assertEqual($build['#cache'], $expected_field_cacheability, 'The field render array contains the entity access cacheability metadata');
-    $expected_item_1 = array(
+    $expected_item_1 = [
       '#type' => 'link',
       '#title' => $this->referencedEntity->label(),
       '#url' => $this->referencedEntity->urlInfo(),
       '#options' => $this->referencedEntity->urlInfo()->getOptions(),
-      '#cache' => array(
+      '#cache' => [
         'contexts' => [
           'user.permissions',
         ],
         'tags' => $this->referencedEntity->getCacheTags(),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($renderer->renderRoot($build[0]), $renderer->renderRoot($expected_item_1), sprintf('The markup returned by the %s formatter is correct for an item with a saved entity.', $formatter));
     $this->assertEqual(CacheableMetadata::createFromRenderArray($build[0]), CacheableMetadata::createFromRenderArray($expected_item_1));
 
     // The second referenced entity is "autocreated", therefore not saved and
     // lacking any URL info.
-    $expected_item_2 = array(
+    $expected_item_2 = [
       '#plain_text' => $this->unsavedReferencedEntity->label(),
-      '#cache' => array(
+      '#cache' => [
         'contexts' => [
           'user.permissions',
         ],
         'tags' => $this->unsavedReferencedEntity->getCacheTags(),
         'max-age' => Cache::PERMANENT,
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($build[1], $expected_item_2, sprintf('The render array returned by the %s formatter is correct for an item with a unsaved entity.', $formatter));
 
     // Test with the 'link' setting set to FALSE.
-    $build = $this->buildRenderArray([$this->referencedEntity, $this->unsavedReferencedEntity], $formatter, array('link' => FALSE));
+    $build = $this->buildRenderArray([$this->referencedEntity, $this->unsavedReferencedEntity], $formatter, ['link' => FALSE]);
     $this->assertEqual($build[0]['#plain_text'], $this->referencedEntity->label(), sprintf('The markup returned by the %s formatter is correct for an item with a saved entity.', $formatter));
     $this->assertEqual($build[1]['#plain_text'], $this->unsavedReferencedEntity->label(), sprintf('The markup returned by the %s formatter is correct for an item with a unsaved entity.', $formatter));
 
@@ -379,12 +379,12 @@ public function testLabelFormatter() {
     $field_storage_config->setSetting('target_type', 'entity_test_label');
     $field_storage_config->save();
 
-    $referenced_entity_with_no_link_template = EntityTestLabel::create(array(
+    $referenced_entity_with_no_link_template = EntityTestLabel::create([
       'name' => $this->randomMachineName(),
-    ));
+    ]);
     $referenced_entity_with_no_link_template->save();
 
-    $build = $this->buildRenderArray([$referenced_entity_with_no_link_template], $formatter, array('link' => TRUE));
+    $build = $this->buildRenderArray([$referenced_entity_with_no_link_template], $formatter, ['link' => TRUE]);
     $this->assertEqual($build[0]['#plain_text'], $referenced_entity_with_no_link_template->label(), sprintf('The markup returned by the %s formatter is correct for an entity type with no valid link template.', $formatter));
   }
 
@@ -403,11 +403,11 @@ public function testLabelFormatter() {
    * @return array
    *   A render array.
    */
-  protected function buildRenderArray(array $referenced_entities, $formatter, $formatter_options = array()) {
+  protected function buildRenderArray(array $referenced_entities, $formatter, $formatter_options = []) {
     // Create the entity that will have the entity reference field.
     $referencing_entity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => $this->randomMachineName()));
+      ->create(['name' => $this->randomMachineName()]);
 
     $items = $referencing_entity->get($this->fieldName);
 
@@ -417,7 +417,7 @@ protected function buildRenderArray(array $referenced_entities, $formatter, $for
     }
 
     // Build the renderable array for the field.
-    return $items->view(array('type' => $formatter, 'settings' => $formatter_options));
+    return $items->view(['type' => $formatter, 'settings' => $formatter_options]);
   }
 
 }
diff --git a/core/modules/field/tests/src/Kernel/EntityReference/EntityReferenceItemTest.php b/core/modules/field/tests/src/Kernel/EntityReference/EntityReferenceItemTest.php
index 90d4d1f774ad7e6b4a2ccf6b6387504b5499e482..ded93b85603f969a1ed7892dfe6233753cd2b9c8 100644
--- a/core/modules/field/tests/src/Kernel/EntityReference/EntityReferenceItemTest.php
+++ b/core/modules/field/tests/src/Kernel/EntityReference/EntityReferenceItemTest.php
@@ -175,7 +175,7 @@ public function testContentEntityReferenceItem() {
     // Delete terms so we have nothing to reference and try again
     $term->delete();
     $term2->delete();
-    $entity = EntityTest::create(array('name' => $this->randomMachineName()));
+    $entity = EntityTest::create(['name' => $this->randomMachineName()]);
     $entity->save();
 
     // Test the generateSampleValue() method.
@@ -244,7 +244,7 @@ public function testConfigEntityReferenceItem() {
     // Delete terms so we have nothing to reference and try again
     $this->vocabulary->delete();
     $vocabulary2->delete();
-    $entity = EntityTest::create(array('name' => $this->randomMachineName()));
+    $entity = EntityTest::create(['name' => $this->randomMachineName()]);
     $entity->save();
   }
 
@@ -253,11 +253,11 @@ public function testConfigEntityReferenceItem() {
    */
   public function testEntityAutoCreate() {
     // The term entity is unsaved here.
-    $term = Term::create(array(
+    $term = Term::create([
       'name' => $this->randomMachineName(),
       'vid' => $this->term->bundle(),
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
     $entity = EntityTest::create();
     // Now assign the unsaved term to the field.
     $entity->field_test_taxonomy_term->entity = $term;
@@ -304,22 +304,22 @@ public function testEntitySaveOrder() {
    */
   public function testSelectionHandlerSettings() {
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'entity_reference',
-      'settings' => array(
+      'settings' => [
         'target_type' => 'entity_test'
-      ),
-    ));
+      ],
+    ]);
     $field_storage->save();
 
     // Do not specify any value for the 'handler' setting in order to verify
     // that the default handler with the correct derivative is used.
-    $field = FieldConfig::create(array(
+    $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'entity_test',
-    ));
+    ]);
     $field->save();
     $field = FieldConfig::load($field->id());
     $this->assertEqual($field->getSetting('handler'), 'default:entity_test');
@@ -350,11 +350,11 @@ public function testSelectionHandlerSettings() {
    */
   public function testAutocreateValidation() {
     // The term entity is unsaved here.
-    $term = Term::create(array(
+    $term = Term::create([
       'name' => $this->randomMachineName(),
       'vid' => $this->term->bundle(),
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
     $entity = EntityTest::create([
       'field_test_taxonomy_term' => [
         'entity' => $term,
diff --git a/core/modules/field/tests/src/Kernel/EntityReference/Views/EntityReferenceRelationshipTest.php b/core/modules/field/tests/src/Kernel/EntityReference/Views/EntityReferenceRelationshipTest.php
index d18d9f30bce3a35a33da5f8e48cfdea41d0329b7..2b0be855dd826b967c7a3779f4da8748bd2d7d00 100644
--- a/core/modules/field/tests/src/Kernel/EntityReference/Views/EntityReferenceRelationshipTest.php
+++ b/core/modules/field/tests/src/Kernel/EntityReference/Views/EntityReferenceRelationshipTest.php
@@ -27,14 +27,14 @@ class EntityReferenceRelationshipTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array(
+  public static $testViews = [
     'test_entity_reference_entity_test_view',
     'test_entity_reference_entity_test_view_long',
     'test_entity_reference_reverse_entity_test_view',
     'test_entity_reference_entity_test_mul_view',
     'test_entity_reference_reverse_entity_test_mul_view',
     'test_entity_reference_group_by_empty_relationships',
-    );
+    ];
 
   /**
    * Modules to install.
@@ -48,7 +48,7 @@ class EntityReferenceRelationshipTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  protected $entities = array();
+  protected $entities = [];
 
   /**
    * {@inheritdoc}
@@ -74,9 +74,9 @@ protected function setUp($import_test_views = TRUE) {
     $this->createEntityReferenceField('entity_test_mul_changed', 'entity_test_mul_changed', 'field_test_data_with_a_long_name', 'field_test_data_with_a_long_name', 'entity_test');
 
     // Create reference from entity_test_mul to entity_test cardinality: infinite.
-    $this->createEntityReferenceField('entity_test_mul', 'entity_test_mul', 'field_data_test_unlimited', 'field_data_test_unlimited', 'entity_test', 'default', array(), FieldStorageConfig::CARDINALITY_UNLIMITED);
+    $this->createEntityReferenceField('entity_test_mul', 'entity_test_mul', 'field_data_test_unlimited', 'field_data_test_unlimited', 'entity_test', 'default', [], FieldStorageConfig::CARDINALITY_UNLIMITED);
 
-    ViewTestData::createTestViews(get_class($this), array('entity_reference_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['entity_reference_test_views']);
   }
 
   /**
diff --git a/core/modules/field/tests/src/Kernel/FieldAttachOtherTest.php b/core/modules/field/tests/src/Kernel/FieldAttachOtherTest.php
index ba96bc915221a01b890fbc81448fffda98aaed18..c1e7ae1c51e891201c91ff7aea6ef86a40d40029 100644
--- a/core/modules/field/tests/src/Kernel/FieldAttachOtherTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldAttachOtherTest.php
@@ -42,23 +42,23 @@ function testEntityDisplayBuild() {
     $display = entity_get_display($entity_type, $entity->bundle(), 'full');
 
     $formatter_setting = $this->randomMachineName();
-    $display_options = array(
+    $display_options = [
       'label' => 'above',
       'type' => 'field_test_default',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting' => $formatter_setting,
-      ),
-    );
+      ],
+    ];
     $display->setComponent($this->fieldTestData->field_name, $display_options);
 
     $formatter_setting_2 = $this->randomMachineName();
-    $display_options_2 = array(
+    $display_options_2 = [
       'label' => 'above',
       'type' => 'field_test_default',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting' => $formatter_setting_2,
-      ),
-    );
+      ],
+    ];
     $display->setComponent($this->fieldTestData->field_name_2, $display_options_2);
 
     // View all fields.
@@ -94,13 +94,13 @@ function testEntityDisplayBuild() {
     // Multiple formatter.
     $entity = clone($entity_init);
     $formatter_setting = $this->randomMachineName();
-    $display->setComponent($this->fieldTestData->field_name, array(
+    $display->setComponent($this->fieldTestData->field_name, [
       'label' => 'above',
       'type' => 'field_test_multiple',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting_multiple' => $formatter_setting,
-      ),
-    ));
+      ],
+    ]);
     $content = $display->build($entity);
     $this->render($content);
     $expected_output = $formatter_setting;
@@ -112,13 +112,13 @@ function testEntityDisplayBuild() {
     // Test a formatter that uses hook_field_formatter_prepare_view().
     $entity = clone($entity_init);
     $formatter_setting = $this->randomMachineName();
-    $display->setComponent($this->fieldTestData->field_name, array(
+    $display->setComponent($this->fieldTestData->field_name, [
       'label' => 'above',
       'type' => 'field_test_with_prepare_view',
-      'settings' => array(
+      'settings' => [
         'test_formatter_setting_additional' => $formatter_setting,
-      ),
-    ));
+      ],
+    ]);
     $content = $display->build($entity);
     $this->render($content);
     foreach ($values as $delta => $value) {
@@ -136,18 +136,18 @@ function testEntityDisplayBuild() {
   function testEntityDisplayViewMultiple() {
     // Use a formatter that has a prepareView() step.
     $display = entity_get_display('entity_test', 'entity_test', 'full')
-      ->setComponent($this->fieldTestData->field_name, array(
+      ->setComponent($this->fieldTestData->field_name, [
         'type' => 'field_test_with_prepare_view',
-      ));
+      ]);
 
     // Create two entities.
-    $entity1 = EntityTest::create(array('id' => 1, 'type' => 'entity_test'));
+    $entity1 = EntityTest::create(['id' => 1, 'type' => 'entity_test']);
     $entity1->{$this->fieldTestData->field_name}->setValue($this->_generateTestFieldValues(1));
-    $entity2 = EntityTest::create(array('id' => 2, 'type' => 'entity_test'));
+    $entity2 = EntityTest::create(['id' => 2, 'type' => 'entity_test']);
     $entity2->{$this->fieldTestData->field_name}->setValue($this->_generateTestFieldValues(1));
 
     // Run buildMultiple(), and check that the entities come out as expected.
-    $display->buildMultiple(array($entity1, $entity2));
+    $display->buildMultiple([$entity1, $entity2]);
     $item1 = $entity1->{$this->fieldTestData->field_name}[0];
     $this->assertEqual($item1->additional_formatter_value, $item1->value + 1, 'Entity 1 ran through the prepareView() formatter method.');
     $item2 = $entity2->{$this->fieldTestData->field_name}[0];
@@ -162,7 +162,7 @@ function testEntityDisplayViewMultiple() {
    */
   function testEntityCache() {
     // Initialize random values and a test entity.
-    $entity_init = EntityTest::create(array('type' => $this->fieldTestData->field->getTargetBundle()));
+    $entity_init = EntityTest::create(['type' => $this->fieldTestData->field->getTargetBundle()]);
     $values = $this->_generateTestFieldValues($this->fieldTestData->field_storage->getCardinality());
 
     // Non-cacheable entity type.
@@ -185,9 +185,9 @@ function testEntityCache() {
 
     $entity_init = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'type' => $entity_type,
-      ));
+      ]);
 
     // Check that no initial cache entry is present.
     $cid = "values:$entity_type:" . $entity->id();
@@ -247,11 +247,11 @@ function testEntityFormDisplayBuildForm() {
     $this->createFieldWithStorage('_2');
 
     $entity_type = 'entity_test';
-    $entity = entity_create($entity_type, array('id' => 1, 'revision_id' => 1, 'type' => $this->fieldTestData->field->getTargetBundle()));
+    $entity = entity_create($entity_type, ['id' => 1, 'revision_id' => 1, 'type' => $this->fieldTestData->field->getTargetBundle()]);
 
     // Test generating widgets for all fields.
     $display = entity_get_form_display($entity_type, $this->fieldTestData->field->getTargetBundle(), 'default');
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $display->buildForm($entity, $form, $form_state);
 
@@ -273,7 +273,7 @@ function testEntityFormDisplayBuildForm() {
         $display->removeComponent($name);
       }
     }
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $display->buildForm($entity, $form, $form_state);
 
@@ -294,18 +294,18 @@ function testEntityFormDisplayExtractFormValues() {
     $entity_type = 'entity_test';
     $entity_init = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('id' => 1, 'revision_id' => 1, 'type' => $this->fieldTestData->field->getTargetBundle()));
+      ->create(['id' => 1, 'revision_id' => 1, 'type' => $this->fieldTestData->field->getTargetBundle()]);
 
     // Build the form for all fields.
     $display = entity_get_form_display($entity_type, $this->fieldTestData->field->getTargetBundle(), 'default');
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $display->buildForm($entity_init, $form, $form_state);
 
     // Simulate incoming values.
     // First field.
-    $values = array();
-    $weights = array();
+    $values = [];
+    $weights = [];
     for ($delta = 0; $delta < $this->fieldTestData->field_storage->getCardinality(); $delta++) {
       $values[$delta]['value'] = mt_rand(1, 127);
       // Assign random weight.
@@ -318,8 +318,8 @@ function testEntityFormDisplayExtractFormValues() {
     // Leave an empty value. 'field_test' fields are empty if empty().
     $values[1]['value'] = 0;
     // Second field.
-    $values_2 = array();
-    $weights_2 = array();
+    $values_2 = [];
+    $weights_2 = [];
     for ($delta = 0; $delta < $this->fieldTestData->field_storage_2->getCardinality(); $delta++) {
       $values_2[$delta]['value'] = mt_rand(1, 127);
       // Assign random weight.
@@ -345,17 +345,17 @@ function testEntityFormDisplayExtractFormValues() {
 
     asort($weights);
     asort($weights_2);
-    $expected_values = array();
-    $expected_values_2 = array();
+    $expected_values = [];
+    $expected_values_2 = [];
     foreach ($weights as $key => $value) {
       if ($key != 1) {
-        $expected_values[] = array('value' => $values[$key]['value']);
+        $expected_values[] = ['value' => $values[$key]['value']];
       }
     }
     $this->assertIdentical($entity->{$this->fieldTestData->field_name}->getValue(), $expected_values, 'Submit filters empty values');
     foreach ($weights_2 as $key => $value) {
       if ($key != 1) {
-        $expected_values_2[] = array('value' => $values_2[$key]['value']);
+        $expected_values_2[] = ['value' => $values_2[$key]['value']];
       }
     }
     $this->assertIdentical($entity->{$this->fieldTestData->field_name_2}->getValue(), $expected_values_2, 'Submit filters empty values');
@@ -368,10 +368,10 @@ function testEntityFormDisplayExtractFormValues() {
     }
     $entity = clone($entity_init);
     $display->extractFormValues($entity, $form, $form_state);
-    $expected_values_2 = array();
+    $expected_values_2 = [];
     foreach ($weights_2 as $key => $value) {
       if ($key != 1) {
-        $expected_values_2[] = array('value' => $values_2[$key]['value']);
+        $expected_values_2[] = ['value' => $values_2[$key]['value']];
       }
     }
     $this->assertTrue($entity->{$this->fieldTestData->field_name}->isEmpty(), 'The first field is empty in the entity object');
diff --git a/core/modules/field/tests/src/Kernel/FieldAttachStorageTest.php b/core/modules/field/tests/src/Kernel/FieldAttachStorageTest.php
index 8237ef4d8b9985330718569216d3f73c0d0b88b1..9f0eef33d24c5cfb86d5c9172c2d9fdaba94aac4 100644
--- a/core/modules/field/tests/src/Kernel/FieldAttachStorageTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldAttachStorageTest.php
@@ -31,7 +31,7 @@ function testFieldAttachSaveLoad() {
 
     // TODO : test empty values filtering and "compression" (store consecutive deltas).
     // Preparation: create three revisions and store them in $revision array.
-    $values = array();
+    $values = [];
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
       ->create();
@@ -54,17 +54,17 @@ function testFieldAttachSaveLoad() {
     $this->assertEqual(count($entity->{$this->fieldTestData->field_name}), $cardinality, 'Current revision: expected number of values');
     for ($delta = 0; $delta < $cardinality; $delta++) {
       // The field value loaded matches the one inserted or updated.
-      $this->assertEqual($entity->{$this->fieldTestData->field_name}[$delta]->value, $values[$current_revision][$delta]['value'], format_string('Current revision: expected value %delta was found.', array('%delta' => $delta)));
+      $this->assertEqual($entity->{$this->fieldTestData->field_name}[$delta]->value, $values[$current_revision][$delta]['value'], format_string('Current revision: expected value %delta was found.', ['%delta' => $delta]));
     }
 
     // Confirm each revision loads the correct data.
     foreach (array_keys($values) as $revision_id) {
       $entity = $storage->loadRevision($revision_id);
       // Number of values per field loaded equals the field cardinality.
-      $this->assertEqual(count($entity->{$this->fieldTestData->field_name}), $cardinality, format_string('Revision %revision_id: expected number of values.', array('%revision_id' => $revision_id)));
+      $this->assertEqual(count($entity->{$this->fieldTestData->field_name}), $cardinality, format_string('Revision %revision_id: expected number of values.', ['%revision_id' => $revision_id]));
       for ($delta = 0; $delta < $cardinality; $delta++) {
         // The field value loaded matches the one inserted or updated.
-        $this->assertEqual($entity->{$this->fieldTestData->field_name}[$delta]->value, $values[$revision_id][$delta]['value'], format_string('Revision %revision_id: expected value %delta was found.', array('%revision_id' => $revision_id, '%delta' => $delta)));
+        $this->assertEqual($entity->{$this->fieldTestData->field_name}[$delta]->value, $values[$revision_id][$delta]['value'], format_string('Revision %revision_id: expected value %delta was found.', ['%revision_id' => $revision_id, '%delta' => $delta]));
       }
     }
   }
@@ -76,28 +76,28 @@ function testFieldAttachLoadMultiple() {
     $entity_type = 'entity_test_rev';
 
     // Define 2 bundles.
-    $bundles = array(
+    $bundles = [
       1 => 'test_bundle_1',
       2 => 'test_bundle_2',
-    );
+    ];
     entity_test_create_bundle($bundles[1]);
     entity_test_create_bundle($bundles[2]);
     // Define 3 fields:
     // - field_1 is in bundle_1 and bundle_2,
     // - field_2 is in bundle_1,
     // - field_3 is in bundle_2.
-    $field_bundles_map = array(
-      1 => array(1, 2),
-      2 => array(1),
-      3 => array(2),
-    );
+    $field_bundles_map = [
+      1 => [1, 2],
+      2 => [1],
+      3 => [2],
+    ];
     for ($i = 1; $i <= 3; $i++) {
       $field_names[$i] = 'field_' . $i;
-      $field_storage = FieldStorageConfig::create(array(
+      $field_storage = FieldStorageConfig::create([
         'field_name' => $field_names[$i],
         'entity_type' => $entity_type,
         'type' => 'test_field',
-      ));
+      ]);
       $field_storage->save();
       $field_ids[$i] = $field_storage->uuid();
       foreach ($field_bundles_map[$i] as $bundle) {
@@ -113,14 +113,14 @@ function testFieldAttachLoadMultiple() {
     foreach ($bundles as $index => $bundle) {
       $entities[$index] = $this->container->get('entity_type.manager')
         ->getStorage($entity_type)
-        ->create(array('id' => $index, 'revision_id' => $index, 'type' => $bundle));
+        ->create(['id' => $index, 'revision_id' => $index, 'type' => $bundle]);
       $entity = clone($entities[$index]);
       foreach ($field_names as $field_name) {
         if (!$entity->hasField($field_name)) {
           continue;
         }
         $values[$index][$field_name] = mt_rand(1, 127);
-        $entity->$field_name->setValue(array('value' => $values[$index][$field_name]));
+        $entity->$field_name->setValue(['value' => $values[$index][$field_name]]);
       }
       $entity->enforceIsnew();
       $entity->save();
@@ -136,7 +136,7 @@ function testFieldAttachLoadMultiple() {
           continue;
         }
         // The field value loaded matches the one inserted.
-        $this->assertEqual($entity->{$field_name}->value, $values[$index][$field_name], format_string('Entity %index: expected value was found.', array('%index' => $index)));
+        $this->assertEqual($entity->{$field_name}->value, $values[$index][$field_name], format_string('Entity %index: expected value was found.', ['%index' => $index]));
       }
     }
   }
@@ -150,7 +150,7 @@ function testFieldAttachSaveEmptyData() {
 
     $entity_init = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('id' => 1));
+      ->create(['id' => 1]);
 
     // Insert: Field is NULL.
     $entity = clone $entity_init;
@@ -184,7 +184,7 @@ function testFieldAttachSaveEmptyData() {
 
     // Update: Field is empty array. Data should be wiped.
     $entity = clone($entity_init);
-    $entity->{$this->fieldTestData->field_name} = array();
+    $entity->{$this->fieldTestData->field_name} = [];
     $entity = $this->entitySaveReload($entity);
     $this->assertTrue($entity->{$this->fieldTestData->field_name}->isEmpty(), 'Update: empty array removes existing values');
   }
@@ -203,7 +203,7 @@ function testFieldAttachSaveEmptyDataDefaultValue() {
     // Verify that fields are populated with default values.
     $entity_init = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('id' => 1, 'revision_id' => 1));
+      ->create(['id' => 1, 'revision_id' => 1]);
     $default = field_test_default_value($entity_init, $this->fieldTestData->field);
     $this->assertEqual($entity_init->{$this->fieldTestData->field_name}->getValue(), $default, 'Default field value correctly populated.');
 
@@ -215,10 +215,10 @@ function testFieldAttachSaveEmptyDataDefaultValue() {
     $this->assertTrue($entity->{$this->fieldTestData->field_name}->isEmpty(), 'Insert: NULL field results in no value saved');
 
     // Verify that prepopulated field values are not overwritten by defaults.
-    $value = array(array('value' => $default[0]['value'] - mt_rand(1, 127)));
+    $value = [['value' => $default[0]['value'] - mt_rand(1, 127)]];
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('type' => $entity_init->bundle(), $this->fieldTestData->field_name => $value));
+      ->create(['type' => $entity_init->bundle(), $this->fieldTestData->field_name => $value]);
     $this->assertEqual($entity->{$this->fieldTestData->field_name}->getValue(), $value, 'Prepopulated field value correctly maintained.');
   }
 
@@ -231,8 +231,8 @@ function testFieldAttachDelete() {
     $cardinality = $this->fieldTestData->field_storage->getCardinality();
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('type' => $this->fieldTestData->field->getTargetBundle()));
-    $vids = array();
+      ->create(['type' => $this->fieldTestData->field->getTargetBundle()]);
+    $vids = [];
 
     // Create revision 0
     $values = $this->_generateTestFieldValues($cardinality);
@@ -261,7 +261,7 @@ function testFieldAttachDelete() {
     // Delete revision 1, confirm the other two still load.
     $controller->deleteRevision($vids[1]);
     $controller->resetCache();
-    foreach (array(0, 2) as $key) {
+    foreach ([0, 2] as $key) {
       $vid = $vids[$key];
       $revision = $controller->loadRevision($vid);
       $this->assertEqual(count($revision->{$this->fieldTestData->field_name}), $cardinality, "The test entity revision $vid has $cardinality values.");
@@ -275,7 +275,7 @@ function testFieldAttachDelete() {
     // Delete all field data, confirm nothing loads
     $entity->delete();
     $controller->resetCache();
-    foreach (array(0, 1, 2) as $vid) {
+    foreach ([0, 1, 2] as $vid) {
       $revision = $controller->loadRevision($vid);
       $this->assertFalse($revision);
     }
@@ -301,7 +301,7 @@ function testEntityCreateBundle() {
     // Save an entity with data in the field.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('type' => $this->fieldTestData->field->getTargetBundle()));
+      ->create(['type' => $this->fieldTestData->field->getTargetBundle()]);
     $values = $this->_generateTestFieldValues($cardinality);
     $entity->{$this->fieldTestData->field_name} = $values;
 
@@ -327,27 +327,27 @@ function testEntityDeleteBundle() {
 
     // Create a second field for the test bundle
     $field_name = Unicode::strtolower($this->randomMachineName() . '_field_name');
-    $field_storage = array(
+    $field_storage = [
       'field_name' => $field_name,
       'entity_type' => $entity_type,
       'type' => 'test_field',
       'cardinality' => 1,
-    );
+    ];
     FieldStorageConfig::create($field_storage)->save();
-    $field = array(
+    $field = [
       'field_name' => $field_name,
       'entity_type' => $entity_type,
       'bundle' => $this->fieldTestData->field->getTargetBundle(),
       'label' => $this->randomMachineName() . '_label',
       'description' => $this->randomMachineName() . '_description',
       'weight' => mt_rand(0, 127),
-    );
+    ];
     FieldConfig::create($field)->save();
 
     // Save an entity with data for both fields
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('type' => $this->fieldTestData->field->getTargetBundle()));
+      ->create(['type' => $this->fieldTestData->field->getTargetBundle()]);
     $values = $this->_generateTestFieldValues($this->fieldTestData->field_storage->getCardinality());
     $entity->{$this->fieldTestData->field_name} = $values;
     $entity->{$field_name} = $this->_generateTestFieldValues(1);
diff --git a/core/modules/field/tests/src/Kernel/FieldCrudTest.php b/core/modules/field/tests/src/Kernel/FieldCrudTest.php
index a61d64565f724d9d2d90784c72a9132ab617924b..85121c96e741e6f4fbeb8adf0bd0b8ee9cd0460f 100644
--- a/core/modules/field/tests/src/Kernel/FieldCrudTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldCrudTest.php
@@ -40,18 +40,18 @@ class FieldCrudTest extends FieldKernelTestBase {
   function setUp() {
     parent::setUp();
 
-    $this->fieldStorageDefinition = array(
+    $this->fieldStorageDefinition = [
       'field_name' => Unicode::strtolower($this->randomMachineName()),
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-    );
+    ];
     $this->fieldStorage = FieldStorageConfig::create($this->fieldStorageDefinition);
     $this->fieldStorage->save();
-    $this->fieldDefinition = array(
+    $this->fieldDefinition = [
       'field_name' => $this->fieldStorage->getName(),
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
-    );
+    ];
   }
 
   // TODO : test creation with
@@ -223,12 +223,12 @@ function testDeleteField() {
     FieldConfig::create($another_field_definition)->save();
 
     // Test that the first field is not deleted, and then delete it.
-    $field = current(entity_load_multiple_by_properties('field_config', array('entity_type' => 'entity_test', 'field_name' => $this->fieldDefinition['field_name'], 'bundle' => $this->fieldDefinition['bundle'], 'include_deleted' => TRUE)));
+    $field = current(entity_load_multiple_by_properties('field_config', ['entity_type' => 'entity_test', 'field_name' => $this->fieldDefinition['field_name'], 'bundle' => $this->fieldDefinition['bundle'], 'include_deleted' => TRUE]));
     $this->assertTrue(!empty($field) && empty($field->deleted), 'A new field is not marked for deletion.');
     $field->delete();
 
     // Make sure the field is marked as deleted when it is specifically loaded.
-    $field = current(entity_load_multiple_by_properties('field_config', array('entity_type' => 'entity_test', 'field_name' => $this->fieldDefinition['field_name'], 'bundle' => $this->fieldDefinition['bundle'], 'include_deleted' => TRUE)));
+    $field = current(entity_load_multiple_by_properties('field_config', ['entity_type' => 'entity_test', 'field_name' => $this->fieldDefinition['field_name'], 'bundle' => $this->fieldDefinition['bundle'], 'include_deleted' => TRUE]));
     $this->assertTrue($field->isDeleted(), 'A deleted field is marked for deletion.');
 
     // Try to load the field normally and make sure it does not show up.
@@ -276,7 +276,7 @@ function testDeleteFieldCrossDeletion() {
     $field->save();
     $field_2 = FieldConfig::create($field_definition_2);
     $field_2->save();
-    $this->container->get('entity.manager')->getStorage('field_config')->delete(array($field, $field_2));
+    $this->container->get('entity.manager')->getStorage('field_config')->delete([$field, $field_2]);
     $this->assertFalse(FieldStorageConfig::loadByName('entity_test', $field_storage->getName()));
   }
 
diff --git a/core/modules/field/tests/src/Kernel/FieldDataCountTest.php b/core/modules/field/tests/src/Kernel/FieldDataCountTest.php
index e0ea6836903901426109a36f90894f7c2271695d..2bbe24d68caf2bc062a9303a8f72b2fbe0914c30 100644
--- a/core/modules/field/tests/src/Kernel/FieldDataCountTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldDataCountTest.php
@@ -50,12 +50,12 @@ public function testEntityCountAndHasData() {
     // Create a field with a cardinality of 2 to show that we are counting
     // entities and not rows in a table.
     /** @var \Drupal\field\Entity\FieldStorageConfig $field_storage */
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_int',
       'entity_type' => 'entity_test',
       'type' => 'integer',
       'cardinality' => 2,
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -112,7 +112,7 @@ public function testEntityCountAndHasData() {
 
     $entity_init = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('type' => $entity_type,));
+      ->create(['type' => $entity_type,]);
     $cardinality = $this->fieldTestData->field_storage_2->getCardinality();
 
     $this->assertIdentical($this->fieldTestData->field_storage_2->hasData(), FALSE, 'There are no entities with field data.');
@@ -129,7 +129,7 @@ public function testEntityCountAndHasData() {
     $this->assertIdentical($this->fieldTestData->field_storage_2->hasData(), TRUE, 'There are entities with field data.');
     $this->assertIdentical($this->storageRev->countFieldData($this->fieldTestData->field_storage_2), 1, 'There is 1 entity with field data.');
 
-    $entity->{$this->fieldTestData->field_name_2} = array();
+    $entity->{$this->fieldTestData->field_name_2} = [];
     $entity->setNewRevision();
     $entity->save();
 
@@ -137,7 +137,7 @@ public function testEntityCountAndHasData() {
 
     $storage = $this->container->get('entity.manager')->getStorage($entity_type);
     $entity = $storage->loadRevision($first_revision);
-    $this->assertEqual(count($entity->{$this->fieldTestData->field_name_2}), $cardinality, format_string('Revision %revision_id: expected number of values.', array('%revision_id' => $first_revision)));
+    $this->assertEqual(count($entity->{$this->fieldTestData->field_name_2}), $cardinality, format_string('Revision %revision_id: expected number of values.', ['%revision_id' => $first_revision]));
   }
 
   /**
@@ -146,27 +146,27 @@ public function testEntityCountAndHasData() {
   public function testCountWithIndex0() {
     // Create a field that will require dedicated storage.
     /** @var \Drupal\field\Entity\FieldStorageConfig $field_storage */
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_int',
       'entity_type' => 'user',
       'type' => 'integer',
       'cardinality' => 2,
-    ));
+    ]);
     $field_storage->save();
-    FieldConfig::create(array(
+    FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'user',
-    ))->save();
+    ])->save();
 
     // Create an entry for the anonymous user, who has user ID 0.
     $user = $this->storageUser
-      ->create(array(
+      ->create([
         'uid' => 0,
         'name' => 'anonymous',
         'mail' => NULL,
         'status' => FALSE,
         'field_int' => 42,
-      ));
+      ]);
     $user->save();
 
     // Test shared table storage.
diff --git a/core/modules/field/tests/src/Kernel/FieldImportChangeTest.php b/core/modules/field/tests/src/Kernel/FieldImportChangeTest.php
index 8cd029188e8e547e3348ba4b2f49335664ae6b3b..10eff6d6ecaebe8d643ad1fe4654d411e11c470f 100644
--- a/core/modules/field/tests/src/Kernel/FieldImportChangeTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldImportChangeTest.php
@@ -20,7 +20,7 @@ class FieldImportChangeTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test_config');
+  public static $modules = ['field_test_config'];
 
   /**
    * Tests importing an updated field.
diff --git a/core/modules/field/tests/src/Kernel/FieldImportCreateTest.php b/core/modules/field/tests/src/Kernel/FieldImportCreateTest.php
index 3478dd3bea2ea45fa412ff25e0f8feb802bb7432..007bb0f6e01cef34462d9b21764a867cb0b5afa9 100644
--- a/core/modules/field/tests/src/Kernel/FieldImportCreateTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldImportCreateTest.php
@@ -37,7 +37,7 @@ function testImportCreateDefault() {
 
     // Enable field_test_config module and check that the field and storage
     // shipped in the module's default config were created.
-    \Drupal::service('module_installer')->install(array('field_test_config'));
+    \Drupal::service('module_installer')->install(['field_test_config']);
 
     // A field storage with one single field.
     $field_storage = FieldStorageConfig::load($field_storage_id);
diff --git a/core/modules/field/tests/src/Kernel/FieldImportDeleteTest.php b/core/modules/field/tests/src/Kernel/FieldImportDeleteTest.php
index b536fe8046a03900367f5866cc44be6ab599622b..0eef137165a18daec896e93f0533b1d565ac6a69 100644
--- a/core/modules/field/tests/src/Kernel/FieldImportDeleteTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldImportDeleteTest.php
@@ -22,7 +22,7 @@ class FieldImportDeleteTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test_config');
+  public static $modules = ['field_test_config'];
 
   /**
    * Tests deleting field storages and fields as part of config import.
@@ -60,11 +60,11 @@ public function testImportDelete() {
     $active = $this->container->get('config.storage');
     $sync = $this->container->get('config.storage.sync');
     $this->copyConfig($active, $sync);
-    $this->assertTrue($sync->delete($field_storage_config_name), SafeMarkup::format('Deleted field storage: @field_storage', array('@field_storage' => $field_storage_config_name)));
-    $this->assertTrue($sync->delete($field_storage_config_name_2), SafeMarkup::format('Deleted field storage: @field_storage', array('@field_storage' => $field_storage_config_name_2)));
-    $this->assertTrue($sync->delete($field_config_name), SafeMarkup::format('Deleted field: @field', array('@field' => $field_config_name)));
-    $this->assertTrue($sync->delete($field_config_name_2a), SafeMarkup::format('Deleted field: @field', array('@field' => $field_config_name_2a)));
-    $this->assertTrue($sync->delete($field_config_name_2b), SafeMarkup::format('Deleted field: @field', array('@field' => $field_config_name_2b)));
+    $this->assertTrue($sync->delete($field_storage_config_name), SafeMarkup::format('Deleted field storage: @field_storage', ['@field_storage' => $field_storage_config_name]));
+    $this->assertTrue($sync->delete($field_storage_config_name_2), SafeMarkup::format('Deleted field storage: @field_storage', ['@field_storage' => $field_storage_config_name_2]));
+    $this->assertTrue($sync->delete($field_config_name), SafeMarkup::format('Deleted field: @field', ['@field' => $field_config_name]));
+    $this->assertTrue($sync->delete($field_config_name_2a), SafeMarkup::format('Deleted field: @field', ['@field' => $field_config_name_2a]));
+    $this->assertTrue($sync->delete($field_config_name_2b), SafeMarkup::format('Deleted field: @field', ['@field' => $field_config_name_2b]));
 
     $deletes = $this->configImporter()->getUnprocessedConfiguration('delete');
     $this->assertEqual(count($deletes), 5, 'Importing configuration will delete 3 fields and 2 field storages.');
@@ -73,39 +73,39 @@ public function testImportDelete() {
     $this->configImporter()->import();
 
     // Check that the field storages and fields are gone.
-    \Drupal::entityManager()->getStorage('field_storage_config')->resetCache(array($field_storage_id));
+    \Drupal::entityManager()->getStorage('field_storage_config')->resetCache([$field_storage_id]);
     $field_storage = FieldStorageConfig::load($field_storage_id);
     $this->assertFalse($field_storage, 'The field storage was deleted.');
-    \Drupal::entityManager()->getStorage('field_storage_config')->resetCache(array($field_storage_id_2));
+    \Drupal::entityManager()->getStorage('field_storage_config')->resetCache([$field_storage_id_2]);
     $field_storage_2 = FieldStorageConfig::load($field_storage_id_2);
     $this->assertFalse($field_storage_2, 'The second field storage was deleted.');
-    \Drupal::entityManager()->getStorage('field_config')->resetCache(array($field_id));
+    \Drupal::entityManager()->getStorage('field_config')->resetCache([$field_id]);
     $field = FieldConfig::load($field_id);
     $this->assertFalse($field, 'The field was deleted.');
-    \Drupal::entityManager()->getStorage('field_config')->resetCache(array($field_id_2a));
+    \Drupal::entityManager()->getStorage('field_config')->resetCache([$field_id_2a]);
     $field_2a = FieldConfig::load($field_id_2a);
     $this->assertFalse($field_2a, 'The second field on test bundle was deleted.');
-    \Drupal::entityManager()->getStorage('field_config')->resetCache(array($field_id_2b));
+    \Drupal::entityManager()->getStorage('field_config')->resetCache([$field_id_2b]);
     $field_2b = FieldConfig::load($field_id_2b);
     $this->assertFalse($field_2b, 'The second field on test bundle 2 was deleted.');
 
     // Check that all config files are gone.
     $active = $this->container->get('config.storage');
-    $this->assertIdentical($active->listAll($field_storage_config_name), array());
-    $this->assertIdentical($active->listAll($field_storage_config_name_2), array());
-    $this->assertIdentical($active->listAll($field_config_name), array());
-    $this->assertIdentical($active->listAll($field_config_name_2a), array());
-    $this->assertIdentical($active->listAll($field_config_name_2b), array());
+    $this->assertIdentical($active->listAll($field_storage_config_name), []);
+    $this->assertIdentical($active->listAll($field_storage_config_name_2), []);
+    $this->assertIdentical($active->listAll($field_config_name), []);
+    $this->assertIdentical($active->listAll($field_config_name_2a), []);
+    $this->assertIdentical($active->listAll($field_config_name_2b), []);
 
     // Check that the storage definition is preserved in state.
-    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: array();
+    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: [];
     $this->assertTrue(isset($deleted_storages[$field_storage_uuid]));
     $this->assertTrue(isset($deleted_storages[$field_storage_uuid_2]));
 
     // Purge field data, and check that the storage definition has been
     // completely removed once the data is purged.
     field_purge_batch(10);
-    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: array();
+    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: [];
     $this->assertTrue(empty($deleted_storages), 'Fields are deleted');
   }
 
diff --git a/core/modules/field/tests/src/Kernel/FieldImportDeleteUninstallTest.php b/core/modules/field/tests/src/Kernel/FieldImportDeleteUninstallTest.php
index dab6e0d53f63371dc52d808bf25fdc8f6280e7f2..c3a4d3c1d547684d6cec28acc532d9184ff7650b 100644
--- a/core/modules/field/tests/src/Kernel/FieldImportDeleteUninstallTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldImportDeleteUninstallTest.php
@@ -21,14 +21,14 @@ class FieldImportDeleteUninstallTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('telephone');
+  public static $modules = ['telephone'];
 
   protected function setUp() {
     parent::setUp();
     // Module uninstall requires users_data tables.
     // @see drupal_flush_all_caches()
     // @see user_modules_uninstalled()
-    $this->installSchema('user', array('users_data'));
+    $this->installSchema('user', ['users_data']);
   }
 
   /**
@@ -38,11 +38,11 @@ public function testImportDeleteUninstall() {
     // Create a field to delete to prove that
     // \Drupal\field\ConfigImporterFieldPurger does not purge fields that are
     // not related to the configuration synchronization.
-    $unrelated_field_storage = FieldStorageConfig::create(array(
+    $unrelated_field_storage = FieldStorageConfig::create([
       'field_name' => 'field_int',
       'entity_type' => 'entity_test',
       'type' => 'integer',
-    ));
+    ]);
     $unrelated_field_storage->save();
     FieldConfig::create([
       'field_storage' => $unrelated_field_storage,
@@ -50,11 +50,11 @@ public function testImportDeleteUninstall() {
     ])->save();
 
     // Create a telephone field for validation.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_test',
       'entity_type' => 'entity_test',
       'type' => 'telephone',
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -93,7 +93,7 @@ public function testImportDeleteUninstall() {
     $sync->delete('field.field.entity_test.entity_test.field_test');
 
     $steps = $this->configImporter()->initialize();
-    $this->assertIdentical($steps[0], array('\Drupal\field\ConfigImporterFieldPurger', 'process'), 'The additional process configuration synchronization step has been added.');
+    $this->assertIdentical($steps[0], ['\Drupal\field\ConfigImporterFieldPurger', 'process'], 'The additional process configuration synchronization step has been added.');
 
     // This will purge all the data, delete the field and uninstall the
     // Telephone module.
@@ -101,7 +101,7 @@ public function testImportDeleteUninstall() {
 
     $this->assertFalse(\Drupal::moduleHandler()->moduleExists('telephone'));
     $this->assertFalse(\Drupal::entityManager()->loadEntityByUuid('field_storage_config', $field_storage->uuid()), 'The test field has been deleted by the configuration synchronization');
-    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: array();
+    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: [];
     $this->assertFalse(isset($deleted_storages[$field_storage->uuid()]), 'Telephone field has been completed removed from the system.');
     $this->assertTrue(isset($deleted_storages[$unrelated_field_storage->uuid()]), 'Unrelated field not purged by configuration synchronization.');
   }
@@ -112,11 +112,11 @@ public function testImportDeleteUninstall() {
    */
   public function testImportAlreadyDeletedUninstall() {
     // Create a telephone field for validation.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_test',
       'entity_type' => 'entity_test',
       'type' => 'telephone',
-    ));
+    ]);
     $field_storage->save();
     $field_storage_uuid = $field_storage->uuid();
     FieldConfig::create([
@@ -150,18 +150,18 @@ public function testImportAlreadyDeletedUninstall() {
     unset($core_extension['module']['telephone']);
     $sync->write('core.extension', $core_extension);
 
-    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: array();
+    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: [];
     $this->assertTrue(isset($deleted_storages[$field_storage_uuid]), 'Field has been deleted and needs purging before configuration synchronization.');
 
     $steps = $this->configImporter()->initialize();
-    $this->assertIdentical($steps[0], array('\Drupal\field\ConfigImporterFieldPurger', 'process'), 'The additional process configuration synchronization step has been added.');
+    $this->assertIdentical($steps[0], ['\Drupal\field\ConfigImporterFieldPurger', 'process'], 'The additional process configuration synchronization step has been added.');
 
     // This will purge all the data, delete the field and uninstall the
     // Telephone module.
     $this->configImporter()->import();
 
     $this->assertFalse(\Drupal::moduleHandler()->moduleExists('telephone'));
-    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: array();
+    $deleted_storages = \Drupal::state()->get('field.storage.deleted') ?: [];
     $this->assertFalse(isset($deleted_storages[$field_storage_uuid]), 'Field has been completed removed from the system.');
   }
 
diff --git a/core/modules/field/tests/src/Kernel/FieldKernelTestBase.php b/core/modules/field/tests/src/Kernel/FieldKernelTestBase.php
index 4d6bd5111dc61c1fd109522136f7cafebb5a128d..6bc40cc3db8d683ad6533434b1fbad012b1f4a3f 100644
--- a/core/modules/field/tests/src/Kernel/FieldKernelTestBase.php
+++ b/core/modules/field/tests/src/Kernel/FieldKernelTestBase.php
@@ -43,24 +43,24 @@ abstract class FieldKernelTestBase extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->fieldTestData = new \ArrayObject(array(), \ArrayObject::ARRAY_AS_PROPS);
+    $this->fieldTestData = new \ArrayObject([], \ArrayObject::ARRAY_AS_PROPS);
 
     $this->installEntitySchema('entity_test');
     $this->installEntitySchema('user');
     $this->installSchema('system', ['sequences', 'key_value']);
 
     // Set default storage backend and configure the theme system.
-    $this->installConfig(array('field', 'system'));
+    $this->installConfig(['field', 'system']);
 
     // Create user 1.
     $storage = \Drupal::entityManager()->getStorage('user');
     $storage
-      ->create(array(
+      ->create([
         'uid' => 1,
         'name' => 'entity-test',
         'mail' => 'entity@localhost',
         'status' => TRUE,
-      ))
+      ])
       ->save();
   }
 
@@ -88,33 +88,33 @@ protected function createFieldWithStorage($suffix = '', $entity_type = 'entity_t
     $field_definition = 'field_definition' . $suffix;
 
     $this->fieldTestData->$field_name = Unicode::strtolower($this->randomMachineName() . '_field_name' . $suffix);
-    $this->fieldTestData->$field_storage = FieldStorageConfig::create(array(
+    $this->fieldTestData->$field_storage = FieldStorageConfig::create([
       'field_name' => $this->fieldTestData->$field_name,
       'entity_type' => $entity_type,
       'type' => 'test_field',
       'cardinality' => 4,
-    ));
+    ]);
     $this->fieldTestData->$field_storage->save();
     $this->fieldTestData->$field_storage_uuid = $this->fieldTestData->$field_storage->uuid();
-    $this->fieldTestData->$field_definition = array(
+    $this->fieldTestData->$field_definition = [
       'field_storage' => $this->fieldTestData->$field_storage,
       'bundle' => $bundle,
       'label' => $this->randomMachineName() . '_label',
       'description' => $this->randomMachineName() . '_description',
-      'settings' => array(
+      'settings' => [
         'test_field_setting' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     $this->fieldTestData->$field = FieldConfig::create($this->fieldTestData->$field_definition);
     $this->fieldTestData->$field->save();
 
     entity_get_form_display($entity_type, $bundle, 'default')
-      ->setComponent($this->fieldTestData->$field_name, array(
+      ->setComponent($this->fieldTestData->$field_name, [
         'type' => 'test_field_widget',
-        'settings' => array(
+        'settings' => [
           'test_widget_setting' => $this->randomMachineName(),
-        )
-      ))
+        ]
+      ])
       ->save();
   }
 
@@ -159,7 +159,7 @@ protected function entityValidateAndSave(EntityInterface $entity) {
    *   An array of random values, in the format expected for field values.
    */
   protected function _generateTestFieldValues($cardinality) {
-    $values = array();
+    $values = [];
     for ($i = 0; $i < $cardinality; $i++) {
       // field_test fields treat 0 as 'empty value'.
       $values[$i]['value'] = mt_rand(1, 127);
@@ -197,7 +197,7 @@ protected function assertFieldValues(EntityInterface $entity, $field_name, $expe
     $values = $field->getValue();
     $this->assertEqual(count($values), count($expected_values), 'Expected number of values were saved.');
     foreach ($expected_values as $key => $value) {
-      $this->assertEqual($values[$key][$column], $value, format_string('Value @value was saved correctly.', array('@value' => $value)));
+      $this->assertEqual($values[$key][$column], $value, format_string('Value @value was saved correctly.', ['@value' => $value]));
     }
   }
 
diff --git a/core/modules/field/tests/src/Kernel/FieldStorageCrudTest.php b/core/modules/field/tests/src/Kernel/FieldStorageCrudTest.php
index da1948c149b7f54789da426b9a0ded1658427bf8..13091c4dffe283682b6b26138e6a5f3d5debdb48 100644
--- a/core/modules/field/tests/src/Kernel/FieldStorageCrudTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldStorageCrudTest.php
@@ -21,7 +21,7 @@ class FieldStorageCrudTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array();
+  public static $modules = [];
 
   // TODO : test creation with
   // - a full fledged $field structure, check that all the values are there
@@ -32,11 +32,11 @@ class FieldStorageCrudTest extends FieldKernelTestBase {
    * Test the creation of a field storage.
    */
   function testCreate() {
-    $field_storage_definition = array(
+    $field_storage_definition = [
       'field_name' => 'field_2',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-    );
+    ];
     field_test_memorize();
     $field_storage = FieldStorageConfig::create($field_storage_definition);
     $field_storage->save();
@@ -86,10 +86,10 @@ function testCreate() {
 
     // Check that field type is required.
     try {
-      $field_storage_definition = array(
+      $field_storage_definition = [
         'field_name' => 'field_1',
         'entity_type' => 'entity_type',
-      );
+      ];
       FieldStorageConfig::create($field_storage_definition)->save();
       $this->fail(t('Cannot create a field with no type.'));
     }
@@ -99,10 +99,10 @@ function testCreate() {
 
     // Check that field name is required.
     try {
-      $field_storage_definition = array(
+      $field_storage_definition = [
         'type' => 'test_field',
         'entity_type' => 'entity_test',
-      );
+      ];
       FieldStorageConfig::create($field_storage_definition)->save();
       $this->fail(t('Cannot create an unnamed field.'));
     }
@@ -111,10 +111,10 @@ function testCreate() {
     }
     // Check that entity type is required.
     try {
-      $field_storage_definition = array(
+      $field_storage_definition = [
         'field_name' => 'test_field',
         'type' => 'test_field'
-      );
+      ];
       FieldStorageConfig::create($field_storage_definition)->save();
       $this->fail('Cannot create a field without an entity type.');
     }
@@ -124,11 +124,11 @@ function testCreate() {
 
     // Check that field name must start with a letter or _.
     try {
-      $field_storage_definition = array(
+      $field_storage_definition = [
         'field_name' => '2field_2',
         'entity_type' => 'entity_test',
         'type' => 'test_field',
-      );
+      ];
       FieldStorageConfig::create($field_storage_definition)->save();
       $this->fail(t('Cannot create a field with a name starting with a digit.'));
     }
@@ -138,11 +138,11 @@ function testCreate() {
 
     // Check that field name must only contain lowercase alphanumeric or _.
     try {
-      $field_storage_definition = array(
+      $field_storage_definition = [
         'field_name' => 'field#_3',
         'entity_type' => 'entity_test',
         'type' => 'test_field',
-      );
+      ];
       FieldStorageConfig::create($field_storage_definition)->save();
       $this->fail(t('Cannot create a field with a name containing an illegal character.'));
     }
@@ -152,11 +152,11 @@ function testCreate() {
 
     // Check that field name cannot be longer than 32 characters long.
     try {
-      $field_storage_definition = array(
+      $field_storage_definition = [
         'field_name' => '_12345678901234567890123456789012',
         'entity_type' => 'entity_test',
         'type' => 'test_field',
-      );
+      ];
       FieldStorageConfig::create($field_storage_definition)->save();
       $this->fail(t('Cannot create a field with a name longer than 32 characters.'));
     }
@@ -167,11 +167,11 @@ function testCreate() {
     // Check that field name can not be an entity key.
     // "id" is known as an entity key from the "entity_test" type.
     try {
-      $field_storage_definition = array(
+      $field_storage_definition = [
         'type' => 'test_field',
         'field_name' => 'id',
         'entity_type' => 'entity_test',
-      );
+      ];
       FieldStorageConfig::create($field_storage_definition)->save();
       $this->fail(t('Cannot create a field bearing the name of an entity key.'));
     }
@@ -187,15 +187,15 @@ function testCreate() {
    * since plugin classes (and thus the field type schema) cannot be accessed.
    */
   function testCreateWithExplicitSchema() {
-    $schema = array(
+    $schema = [
       'dummy' => 'foobar'
-    );
-    $field_storage = FieldStorageConfig::create(array(
+    ];
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_2',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
       'schema' => $schema,
-    ));
+    ]);
     $this->assertEqual($field_storage->getSchema(), $schema);
   }
 
@@ -203,31 +203,31 @@ function testCreateWithExplicitSchema() {
    * Tests reading field storage definitions.
    */
   function testRead() {
-    $field_storage_definition = array(
+    $field_storage_definition = [
       'field_name' => 'field_1',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-    );
+    ];
     $field_storage = FieldStorageConfig::create($field_storage_definition);
     $field_storage->save();
     $id = $field_storage->id();
 
     // Check that 'single column' criteria works.
-    $fields = entity_load_multiple_by_properties('field_storage_config', array('field_name' => $field_storage_definition['field_name']));
+    $fields = entity_load_multiple_by_properties('field_storage_config', ['field_name' => $field_storage_definition['field_name']]);
     $this->assertTrue(count($fields) == 1 && isset($fields[$id]), 'The field was properly read.');
 
     // Check that 'multi column' criteria works.
-    $fields = entity_load_multiple_by_properties('field_storage_config', array('field_name' => $field_storage_definition['field_name'], 'type' => $field_storage_definition['type']));
+    $fields = entity_load_multiple_by_properties('field_storage_config', ['field_name' => $field_storage_definition['field_name'], 'type' => $field_storage_definition['type']]);
     $this->assertTrue(count($fields) == 1 && isset($fields[$id]), 'The field was properly read.');
-    $fields = entity_load_multiple_by_properties('field_storage_config', array('field_name' => $field_storage_definition['field_name'], 'type' => 'foo'));
+    $fields = entity_load_multiple_by_properties('field_storage_config', ['field_name' => $field_storage_definition['field_name'], 'type' => 'foo']);
     $this->assertTrue(empty($fields), 'No field was found.');
 
     // Create a field from the field storage.
-    $field_definition = array(
+    $field_definition = [
       'field_name' => $field_storage_definition['field_name'],
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
-    );
+    ];
     FieldConfig::create($field_definition)->save();
   }
 
@@ -236,48 +236,48 @@ function testRead() {
    */
   function testIndexes() {
     // Check that indexes specified by the field type are used by default.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_1',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-    ));
+    ]);
     $field_storage->save();
     $field_storage = FieldStorageConfig::load($field_storage->id());
     $schema = $field_storage->getSchema();
-    $expected_indexes = array('value' => array('value'));
+    $expected_indexes = ['value' => ['value']];
     $this->assertEqual($schema['indexes'], $expected_indexes, 'Field type indexes saved by default');
 
     // Check that indexes specified by the field definition override the field
     // type indexes.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_2',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-      'indexes' => array(
-        'value' => array(),
-      ),
-    ));
+      'indexes' => [
+        'value' => [],
+      ],
+    ]);
     $field_storage->save();
     $field_storage = FieldStorageConfig::load($field_storage->id());
     $schema = $field_storage->getSchema();
-    $expected_indexes = array('value' => array());
+    $expected_indexes = ['value' => []];
     $this->assertEqual($schema['indexes'], $expected_indexes, 'Field definition indexes override field type indexes');
 
     // Check that indexes specified by the field definition add to the field
     // type indexes.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_3',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-      'indexes' => array(
-        'value_2' => array('value'),
-      ),
-    ));
+      'indexes' => [
+        'value_2' => ['value'],
+      ],
+    ]);
     $field_storage->save();
     $id = $field_storage->id();
     $field_storage = FieldStorageConfig::load($id);
     $schema = $field_storage->getSchema();
-    $expected_indexes = array('value' => array('value'), 'value_2' => array('value'));
+    $expected_indexes = ['value' => ['value'], 'value_2' => ['value']];
     $this->assertEqual($schema['indexes'], $expected_indexes, 'Field definition indexes are merged with field type indexes');
   }
 
@@ -288,43 +288,43 @@ function testDelete() {
     // TODO: Also test deletion of the data stored in the field ?
 
     // Create two fields (so we can test that only one is deleted).
-    $field_storage_definition = array(
+    $field_storage_definition = [
       'field_name' => 'field_1',
       'type' => 'test_field',
       'entity_type' => 'entity_test',
-    );
+    ];
     FieldStorageConfig::create($field_storage_definition)->save();
-    $another_field_storage_definition = array(
+    $another_field_storage_definition = [
       'field_name' => 'field_2',
       'type' => 'test_field',
       'entity_type' => 'entity_test',
-    );
+    ];
     FieldStorageConfig::create($another_field_storage_definition)->save();
 
     // Create fields for each.
-    $field_definition = array(
+    $field_definition = [
       'field_name' => $field_storage_definition['field_name'],
       'entity_type' => 'entity_test',
       'bundle' => 'entity_test',
-    );
+    ];
     FieldConfig::create($field_definition)->save();
     $another_field_definition = $field_definition;
     $another_field_definition['field_name'] = $another_field_storage_definition['field_name'];
     FieldConfig::create($another_field_definition)->save();
 
     // Test that the first field is not deleted, and then delete it.
-    $field_storage = current(entity_load_multiple_by_properties('field_storage_config', array('field_name' => $field_storage_definition['field_name'], 'include_deleted' => TRUE)));
+    $field_storage = current(entity_load_multiple_by_properties('field_storage_config', ['field_name' => $field_storage_definition['field_name'], 'include_deleted' => TRUE]));
     $this->assertTrue(!empty($field_storage) && !$field_storage->isDeleted(), 'A new storage is not marked for deletion.');
     FieldStorageConfig::loadByName('entity_test', $field_storage_definition['field_name'])->delete();
 
     // Make sure that the field is marked as deleted when it is specifically
     // loaded.
-    $field_storage = current(entity_load_multiple_by_properties('field_storage_config', array('field_name' => $field_storage_definition['field_name'], 'include_deleted' => TRUE)));
+    $field_storage = current(entity_load_multiple_by_properties('field_storage_config', ['field_name' => $field_storage_definition['field_name'], 'include_deleted' => TRUE]));
     $this->assertTrue($field_storage->isDeleted(), 'A deleted storage is marked for deletion.');
 
     // Make sure that this field is marked as deleted when it is
     // specifically loaded.
-    $field = current(entity_load_multiple_by_properties('field_config', array('entity_type' => 'entity_test', 'field_name' => $field_definition['field_name'], 'bundle' => $field_definition['bundle'], 'include_deleted' => TRUE)));
+    $field = current(entity_load_multiple_by_properties('field_config', ['entity_type' => 'entity_test', 'field_name' => $field_definition['field_name'], 'bundle' => $field_definition['bundle'], 'include_deleted' => TRUE]));
     $this->assertTrue($field->isDeleted(), 'A field whose storage was deleted is marked for deletion.');
 
     // Try to load the storage normally and make sure it does not show up.
@@ -364,11 +364,11 @@ function testDelete() {
   }
 
   function testUpdateFieldType() {
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_type',
       'entity_type' => 'entity_test',
       'type' => 'decimal',
-    ));
+    ]);
     $field_storage->save();
 
     try {
@@ -389,12 +389,12 @@ function testUpdate() {
     // respected. Since cardinality enforcement is consistent across database
     // systems, it makes a good test case.
     $cardinality = 4;
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_update',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
       'cardinality' => $cardinality,
-    ));
+    ]);
     $field_storage->save();
     $field = FieldConfig::create([
       'field_storage' => $field_storage,
@@ -427,14 +427,14 @@ function testUpdate() {
    * Test field type modules forbidding an update.
    */
   function testUpdateForbid() {
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'forbidden',
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-      'settings' => array(
+      'settings' => [
         'changeable' => 0,
         'unchangeable' => 0
-    )));
+    ]]);
     $field_storage->save();
     $field_storage->setSetting('changeable', $field_storage->getSetting('changeable') + 1);
     try {
diff --git a/core/modules/field/tests/src/Kernel/FieldTypePluginManagerTest.php b/core/modules/field/tests/src/Kernel/FieldTypePluginManagerTest.php
index 6d443843acf2952880b62bb4178c40d6efefcfc8..fe46a057f9f96cddc8101548fdc37bc8dc31aca2 100644
--- a/core/modules/field/tests/src/Kernel/FieldTypePluginManagerTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldTypePluginManagerTest.php
@@ -19,10 +19,10 @@ class FieldTypePluginManagerTest extends FieldKernelTestBase {
    */
   function testDefaultSettings() {
     $field_type_manager = \Drupal::service('plugin.manager.field.field_type');
-    foreach (array('test_field', 'shape', 'hidden_test_field') as $type) {
+    foreach (['test_field', 'shape', 'hidden_test_field'] as $type) {
       $definition = $field_type_manager->getDefinition($type);
-      $this->assertIdentical($field_type_manager->getDefaultStorageSettings($type), $definition['class']::defaultStorageSettings(), format_string("%type storage settings were returned", array('%type' => $type)));
-      $this->assertIdentical($field_type_manager->getDefaultFieldSettings($type), $definition['class']::defaultFieldSettings(), format_string(" %type field settings were returned", array('%type' => $type)));
+      $this->assertIdentical($field_type_manager->getDefaultStorageSettings($type), $definition['class']::defaultStorageSettings(), format_string("%type storage settings were returned", ['%type' => $type]));
+      $this->assertIdentical($field_type_manager->getDefaultFieldSettings($type), $definition['class']::defaultFieldSettings(), format_string(" %type field settings were returned", ['%type' => $type]));
     }
   }
 
@@ -32,7 +32,7 @@ function testDefaultSettings() {
   public function testCreateInstance() {
     /** @var \Drupal\Core\Field\FieldTypePluginManagerInterface $field_type_manager */
     $field_type_manager = \Drupal::service('plugin.manager.field.field_type');
-    foreach (array('test_field', 'shape', 'hidden_test_field') as $type) {
+    foreach (['test_field', 'shape', 'hidden_test_field'] as $type) {
       $definition = $field_type_manager->getDefinition($type);
 
       $class = $definition['class'];
@@ -40,16 +40,16 @@ public function testCreateInstance() {
 
       $field_definition = BaseFieldDefinition::create($type);
 
-      $configuration = array(
+      $configuration = [
         'field_definition' => $field_definition,
         'name' => $field_name,
         'parent' => NULL,
-      );
+      ];
 
       $instance = $field_type_manager->createInstance($type, $configuration);
 
-      $this->assertTrue($instance instanceof $class, SafeMarkup::format('Created a @class instance', array('@class' => $class)));
-      $this->assertEqual($field_name, $instance->getName(), SafeMarkup::format('Instance name is @name', array('@name' => $field_name)));
+      $this->assertTrue($instance instanceof $class, SafeMarkup::format('Created a @class instance', ['@class' => $class]));
+      $this->assertEqual($field_name, $instance->getName(), SafeMarkup::format('Instance name is @name', ['@name' => $field_name]));
     }
   }
 
@@ -69,18 +69,18 @@ public function testCreateInstanceWithConfig() {
       ->setLabel('Jenny')
       ->setDefaultValue(8675309);
 
-    $configuration = array(
+    $configuration = [
       'field_definition' => $field_definition,
       'name' => $field_name,
       'parent' => NULL,
-    );
+    ];
 
     $entity = EntityTest::create();
 
     $instance = $field_type_manager->createInstance($type, $configuration);
 
-    $this->assertTrue($instance instanceof $class, SafeMarkup::format('Created a @class instance', array('@class' => $class)));
-    $this->assertEqual($field_name, $instance->getName(), SafeMarkup::format('Instance name is @name', array('@name' => $field_name)));
+    $this->assertTrue($instance instanceof $class, SafeMarkup::format('Created a @class instance', ['@class' => $class]));
+    $this->assertEqual($field_name, $instance->getName(), SafeMarkup::format('Instance name is @name', ['@name' => $field_name]));
     $this->assertEqual($instance->getFieldDefinition()->getLabel(), 'Jenny', 'Instance label is Jenny');
     $this->assertEqual($instance->getFieldDefinition()->getDefaultValue($entity), [['value' => 8675309]], 'Instance default_value is 8675309');
   }
diff --git a/core/modules/field/tests/src/Kernel/FieldValidationTest.php b/core/modules/field/tests/src/Kernel/FieldValidationTest.php
index 3715832d532fa3973f0e90f0ca9874b7697f1401..5eac7734b9382fc5ab5c4cfd0cb360cadf7f790b 100644
--- a/core/modules/field/tests/src/Kernel/FieldValidationTest.php
+++ b/core/modules/field/tests/src/Kernel/FieldValidationTest.php
@@ -34,9 +34,9 @@ protected function setUp() {
     $this->createFieldWithStorage('', $this->entityType, $this->bundle);
 
     // Create an 'entity_test' entity.
-    $this->entity = entity_create($this->entityType, array(
+    $this->entity = entity_create($this->entityType, [
       'type' => $this->bundle,
-    ));
+    ]);
   }
 
   /**
@@ -47,7 +47,7 @@ function testCardinalityConstraint() {
     $entity = $this->entity;
 
     for ($delta = 0; $delta < $cardinality + 1; $delta++) {
-      $entity->{$this->fieldTestData->field_name}[] = array('value' => 1);
+      $entity->{$this->fieldTestData->field_name}[] = ['value' => 1];
     }
 
     // Validate the field.
@@ -56,7 +56,7 @@ function testCardinalityConstraint() {
     // Check that the expected constraint violations are reported.
     $this->assertEqual(count($violations), 1);
     $this->assertEqual($violations[0]->getPropertyPath(), '');
-    $this->assertEqual($violations[0]->getMessage(), t('%name: this field cannot hold more than @count values.', array('%name' => $this->fieldTestData->field->getLabel(), '@count' => $cardinality)));
+    $this->assertEqual($violations[0]->getMessage(), t('%name: this field cannot hold more than @count values.', ['%name' => $this->fieldTestData->field->getLabel(), '@count' => $cardinality]));
   }
 
   /**
@@ -70,7 +70,7 @@ function testFieldConstraints() {
     $this->assertTrue($cardinality >= 2);
 
     // Set up values for the field.
-    $expected_violations = array();
+    $expected_violations = [];
     for ($delta = 0; $delta < $cardinality; $delta++) {
       // All deltas except '1' have incorrect values.
       if ($delta == 1) {
@@ -78,7 +78,7 @@ function testFieldConstraints() {
       }
       else {
         $value = -1;
-        $expected_violations[$delta . '.value'][] = t('%name does not accept the value -1.', array('%name' => $this->fieldTestData->field->getLabel()));
+        $expected_violations[$delta . '.value'][] = t('%name does not accept the value -1.', ['%name' => $this->fieldTestData->field->getLabel()]);
       }
       $entity->{$this->fieldTestData->field_name}[] = $value;
     }
@@ -87,7 +87,7 @@ function testFieldConstraints() {
     $violations = $entity->{$this->fieldTestData->field_name}->validate();
 
     // Check that the expected constraint violations are reported.
-    $violations_by_path = array();
+    $violations_by_path = [];
     foreach ($violations as $violation) {
       $violations_by_path[$violation->getPropertyPath()][] = $violation->getMessage();
     }
diff --git a/core/modules/field/tests/src/Kernel/FormatterPluginManagerTest.php b/core/modules/field/tests/src/Kernel/FormatterPluginManagerTest.php
index 4425a44eb18cc1f857da50f6b9fdd8424b86a537..0b07e3ad9b8f5d324a912d5ed3706e0b54da27d8 100644
--- a/core/modules/field/tests/src/Kernel/FormatterPluginManagerTest.php
+++ b/core/modules/field/tests/src/Kernel/FormatterPluginManagerTest.php
@@ -24,13 +24,13 @@ public function testNotApplicableFallback() {
       // Set a name that will make isApplicable() return TRUE.
       ->setName('field_test_field');
 
-    $formatter_options = array(
+    $formatter_options = [
       'field_definition' => $base_field_definition,
       'view_mode' => 'default',
-      'configuration' => array(
+      'configuration' => [
         'type' => 'field_test_applicable',
-      ),
-    );
+      ],
+    ];
 
     $instance = $formatter_plugin_manager->getInstance($formatter_options);
     $this->assertEqual($instance->getPluginId(), 'field_test_applicable');
diff --git a/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldFormatterSettingsTest.php b/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldFormatterSettingsTest.php
index 2ee3c779bc04bb9f1cd2b3e201f8d3f6e24e6d85..edf6dc0b21218ef80aec20bae90175862c440f84 100644
--- a/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldFormatterSettingsTest.php
+++ b/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldFormatterSettingsTest.php
@@ -26,14 +26,14 @@ protected function setUp() {
   public function testEntityDisplaySettings() {
     // Run tests.
     $field_name = "field_test";
-    $expected = array(
+    $expected = [
       'label' => 'above',
       'weight' => 1,
       'type' => 'text_trimmed',
-      'settings' => array('trim_length' => 600),
-      'third_party_settings' => array(),
+      'settings' => ['trim_length' => 600],
+      'third_party_settings' => [],
       'region' => 'content',
-    );
+    ];
 
     // Can we load any entity display.
     $display = EntityViewDisplay::load('node.story.teaser');
@@ -51,7 +51,7 @@ public function testEntityDisplaySettings() {
 
     // Test the default format with text_default which comes from a static map.
     $expected['type'] = 'text_default';
-    $expected['settings'] = array();
+    $expected['settings'] = [];
     $display = EntityViewDisplay::load('node.story.default');
     $this->assertIdentical($expected, $display->getComponent($field_name));
 
@@ -66,40 +66,40 @@ public function testEntityDisplaySettings() {
     // Test the number field formatter settings are correct.
     $expected['weight'] = 1;
     $expected['type'] = 'number_integer';
-    $expected['settings'] = array(
+    $expected['settings'] = [
       'thousand_separator' => ',',
       'prefix_suffix' => TRUE,
-    );
+    ];
     $component = $display->getComponent('field_test_two');
     $this->assertIdentical($expected, $component);
     $expected['weight'] = 2;
     $expected['type'] = 'number_decimal';
-    $expected['settings'] = array(
+    $expected['settings'] = [
        'scale' => 2,
        'decimal_separator' => '.',
        'thousand_separator' => ',',
        'prefix_suffix' => TRUE,
-    );
+    ];
     $component = $display->getComponent('field_test_three');
     $this->assertIdentical($expected, $component);
 
     // Test the email field formatter settings are correct.
     $expected['weight'] = 6;
     $expected['type'] = 'email_mailto';
-    $expected['settings'] = array();
+    $expected['settings'] = [];
     $component = $display->getComponent('field_test_email');
     $this->assertIdentical($expected, $component);
 
     // Test the link field formatter settings.
     $expected['weight'] = 7;
     $expected['type'] = 'link';
-    $expected['settings'] = array(
+    $expected['settings'] = [
       'trim_length' => 80,
       'url_only' => TRUE,
       'url_plain' => TRUE,
       'rel' => '0',
       'target' => '0',
-    );
+    ];
     $component = $display->getComponent('field_test_link');
     $this->assertIdentical($expected, $component);
     $expected['settings']['url_only'] = FALSE;
@@ -111,7 +111,7 @@ public function testEntityDisplaySettings() {
     // Test the file field formatter settings.
     $expected['weight'] = 8;
     $expected['type'] = 'file_default';
-    $expected['settings'] = array();
+    $expected['settings'] = [];
     $component = $display->getComponent('field_test_filefield');
     $this->assertIdentical($expected, $component);
     $display = EntityViewDisplay::load('node.story.default');
@@ -122,7 +122,7 @@ public function testEntityDisplaySettings() {
     // Test the image field formatter settings.
     $expected['weight'] = 9;
     $expected['type'] = 'image';
-    $expected['settings'] = array('image_style' => '', 'image_link' => '');
+    $expected['settings'] = ['image_style' => '', 'image_link' => ''];
     $component = $display->getComponent('field_test_imagefield');
     $this->assertIdentical($expected, $component);
     $display = EntityViewDisplay::load('node.story.teaser');
@@ -133,15 +133,15 @@ public function testEntityDisplaySettings() {
     // Test phone field.
     $expected['weight'] = 13;
     $expected['type'] = 'basic_string';
-    $expected['settings'] = array();
+    $expected['settings'] = [];
     $component = $display->getComponent('field_test_phone');
     $this->assertIdentical($expected, $component);
 
     // Test date field.
-    $defaults = array('format_type' => 'fallback', 'timezone_override' => '',);
+    $defaults = ['format_type' => 'fallback', 'timezone_override' => '',];
     $expected['weight'] = 10;
     $expected['type'] = 'datetime_default';
-    $expected['settings'] = array('format_type' => 'fallback') + $defaults;
+    $expected['settings'] = ['format_type' => 'fallback'] + $defaults;
     $component = $display->getComponent('field_test_date');
     $this->assertIdentical($expected, $component);
     $display = EntityViewDisplay::load('node.story.default');
@@ -155,13 +155,13 @@ public function testEntityDisplaySettings() {
     $component = $display->getComponent('field_test_datestamp');
     $this->assertIdentical($expected, $component);
     $display = EntityViewDisplay::load('node.story.teaser');
-    $expected['settings'] = array('format_type' => 'medium') + $defaults;
+    $expected['settings'] = ['format_type' => 'medium'] + $defaults;
     $component = $display->getComponent('field_test_datestamp');
     $this->assertIdentical($expected, $component);
 
     // Test datetime field.
     $expected['weight'] = 12;
-    $expected['settings'] = array('format_type' => 'short') + $defaults;
+    $expected['settings'] = ['format_type' => 'short'] + $defaults;
     $component = $display->getComponent('field_test_datetime');
     $this->assertIdentical($expected, $component);
     $display = EntityViewDisplay::load('node.story.default');
@@ -176,7 +176,7 @@ public function testEntityDisplaySettings() {
     $component = $display->getComponent('field_test_datetime');
     $this->assertIdentical($expected, $component);
     // Test that our Id map has the correct data.
-    $this->assertIdentical(array('node', 'story', 'teaser', 'field_test'), $this->getMigration('d6_field_formatter_settings')->getIdMap()->lookupDestinationID(array('story', 'teaser', 'node', 'field_test')));
+    $this->assertIdentical(['node', 'story', 'teaser', 'field_test'], $this->getMigration('d6_field_formatter_settings')->getIdMap()->lookupDestinationID(['story', 'teaser', 'node', 'field_test']));
   }
 
 }
diff --git a/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldInstanceTest.php b/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldInstanceTest.php
index b3fac3fc585a9fa860c660bce6d98daa92d319e9..b1eec3562356cb5ea1a20ef4b65644f13bf38ec0 100644
--- a/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldInstanceTest.php
+++ b/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldInstanceTest.php
@@ -32,24 +32,24 @@ public function testFieldInstanceMigration() {
     // Test a number field.
     $field = FieldConfig::load('node.story.field_test_two');
     $this->assertIdentical('Integer Field', $field->label());
-    $expected = array(
+    $expected = [
       'min' => 10,
       'max' => 100,
       'prefix' => 'pref',
       'suffix' => 'suf',
       'unsigned' => FALSE,
       'size' => 'normal',
-    );
+    ];
     $this->assertIdentical($expected, $field->getSettings());
 
     $field = FieldConfig::load('node.story.field_test_four');
     $this->assertIdentical('Float Field', $field->label());
-    $expected = array(
+    $expected = [
       'min' => 100.0,
       'max' => 200.0,
       'prefix' => 'id-',
       'suffix' => '',
-    );
+    ];
     $this->assertIdentical($expected, $field->getSettings());
 
     // Test email field.
@@ -70,7 +70,7 @@ public function testFieldInstanceMigration() {
     // Test a filefield.
     $field = FieldConfig::load('node.story.field_test_filefield');
     $this->assertIdentical('File Field', $field->label());
-    $expected = array(
+    $expected = [
       'file_extensions' => 'txt pdf doc',
       'file_directory' => 'images',
       'description_field' => TRUE,
@@ -80,8 +80,8 @@ public function testFieldInstanceMigration() {
       'display_default' => FALSE,
       'uri_scheme' => 'public',
       'handler' => 'default:file',
-      'handler_settings' => array(),
-    );
+      'handler_settings' => [],
+    ];
     $field_settings = $field->getSettings();
     ksort($expected);
     ksort($field_settings);
@@ -91,7 +91,7 @@ public function testFieldInstanceMigration() {
     // Test a link field.
     $field = FieldConfig::load('node.story.field_test_link');
     $this->assertIdentical('Link Field', $field->label());
-    $expected = array('title' => 2, 'link_type' => LinkItemInterface::LINK_GENERIC);
+    $expected = ['title' => 2, 'link_type' => LinkItemInterface::LINK_GENERIC];
     $this->assertIdentical($expected, $field->getSettings());
     $this->assertIdentical('default link title', $entity->field_test_link->title, 'Field field_test_link default title is correct.');
     $this->assertIdentical('https://www.drupal.org', $entity->field_test_link->url, 'Field field_test_link default title is correct.');
diff --git a/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldTest.php b/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldTest.php
index ea3fec8dd1c3ac9bf1dbc6ff382e226cee8857d3..690016172fe57d013207b516c6f25056fd11863e 100644
--- a/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldTest.php
+++ b/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldTest.php
@@ -33,38 +33,38 @@ public function testFields() {
 
     // Integer field.
     $field_storage = FieldStorageConfig::load('node.field_test_two');
-    $this->assertIdentical("integer", $field_storage->getType(), t('Field type is @fieldtype. It should be integer.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("integer", $field_storage->getType(), t('Field type is @fieldtype. It should be integer.', ['@fieldtype' => $field_storage->getType()]));
 
     // Float field.
     $field_storage = FieldStorageConfig::load('node.field_test_three');
-    $this->assertIdentical("decimal", $field_storage->getType(), t('Field type is @fieldtype. It should be decimal.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("decimal", $field_storage->getType(), t('Field type is @fieldtype. It should be decimal.', ['@fieldtype' => $field_storage->getType()]));
 
     // Link field.
     $field_storage = FieldStorageConfig::load('node.field_test_link');
-    $this->assertIdentical("link", $field_storage->getType(), t('Field type is @fieldtype. It should be link.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("link", $field_storage->getType(), t('Field type is @fieldtype. It should be link.', ['@fieldtype' => $field_storage->getType()]));
 
     // File field.
     $field_storage = FieldStorageConfig::load('node.field_test_filefield');
-    $this->assertIdentical("file", $field_storage->getType(), t('Field type is @fieldtype. It should be file.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("file", $field_storage->getType(), t('Field type is @fieldtype. It should be file.', ['@fieldtype' => $field_storage->getType()]));
 
     $field_storage = FieldStorageConfig::load('node.field_test_imagefield');
-    $this->assertIdentical("image", $field_storage->getType(), t('Field type is @fieldtype. It should be image.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("image", $field_storage->getType(), t('Field type is @fieldtype. It should be image.', ['@fieldtype' => $field_storage->getType()]));
     $settings = $field_storage->getSettings();
     $this->assertIdentical('file', $settings['target_type']);
     $this->assertIdentical('public', $settings['uri_scheme']);
-    $this->assertIdentical(array(), array_filter($settings['default_image']));
+    $this->assertIdentical([], array_filter($settings['default_image']));
 
     // Phone field.
     $field_storage = FieldStorageConfig::load('node.field_test_phone');
-    $this->assertIdentical("telephone", $field_storage->getType(), t('Field type is @fieldtype. It should be telephone.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("telephone", $field_storage->getType(), t('Field type is @fieldtype. It should be telephone.', ['@fieldtype' => $field_storage->getType()]));
 
     // Date field.
     $field_storage = FieldStorageConfig::load('node.field_test_datetime');
-    $this->assertIdentical("datetime", $field_storage->getType(), t('Field type is @fieldtype. It should be datetime.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("datetime", $field_storage->getType(), t('Field type is @fieldtype. It should be datetime.', ['@fieldtype' => $field_storage->getType()]));
 
     // Decimal field with radio buttons.
     $field_storage = FieldStorageConfig::load('node.field_test_decimal_radio_buttons');
-    $this->assertIdentical("list_float", $field_storage->getType(), t('Field type is @fieldtype. It should be list_float.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("list_float", $field_storage->getType(), t('Field type is @fieldtype. It should be list_float.', ['@fieldtype' => $field_storage->getType()]));
     $this->assertNotNull($field_storage->getSetting('allowed_values')['1.2'], t('First allowed value key is set to 1.2'));
     $this->assertNotNull($field_storage->getSetting('allowed_values')['2.1'], t('Second allowed value key is set to 2.1'));
     $this->assertIdentical('1.2', $field_storage->getSetting('allowed_values')['1.2'], t('First allowed value is set to 1.2'));
@@ -72,11 +72,11 @@ public function testFields() {
 
     // Float field with a single checkbox.
     $field_storage = FieldStorageConfig::load('node.field_test_float_single_checkbox');
-    $this->assertIdentical("boolean", $field_storage->getType(), t('Field type is @fieldtype. It should be boolean.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("boolean", $field_storage->getType(), t('Field type is @fieldtype. It should be boolean.', ['@fieldtype' => $field_storage->getType()]));
 
     // Integer field with a select list.
     $field_storage = FieldStorageConfig::load('node.field_test_integer_selectlist');
-    $this->assertIdentical("list_integer", $field_storage->getType(), t('Field type is @fieldtype. It should be list_integer.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("list_integer", $field_storage->getType(), t('Field type is @fieldtype. It should be list_integer.', ['@fieldtype' => $field_storage->getType()]));
     $this->assertNotNull($field_storage->getSetting('allowed_values')['1234'], t('First allowed value key is set to 1234'));
     $this->assertNotNull($field_storage->getSetting('allowed_values')['2341'], t('Second allowed value key is set to 2341'));
     $this->assertNotNull($field_storage->getSetting('allowed_values')['3412'], t('Third allowed value key is set to 3412'));
@@ -88,7 +88,7 @@ public function testFields() {
 
     // Text field with a single checkbox.
     $field_storage = FieldStorageConfig::load('node.field_test_text_single_checkbox');
-    $this->assertIdentical("boolean", $field_storage->getType(), t('Field type is @fieldtype. It should be boolean.', array('@fieldtype' => $field_storage->getType())));
+    $this->assertIdentical("boolean", $field_storage->getType(), t('Field type is @fieldtype. It should be boolean.', ['@fieldtype' => $field_storage->getType()]));
 
     // Validate that the source count and processed count match up.
     /** @var \Drupal\migrate\Plugin\MigrationInterface $migration */
diff --git a/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldWidgetSettingsTest.php b/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldWidgetSettingsTest.php
index e7bb63621a0ba68d7c63b84f546ac24cde6e45d0..2a9dd1baef2cb45a8b51fdf474fb6e4f8d8e61e2 100644
--- a/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldWidgetSettingsTest.php
+++ b/core/modules/field/tests/src/Kernel/Migrate/d6/MigrateFieldWidgetSettingsTest.php
@@ -30,9 +30,9 @@ public function testWidgetSettings() {
 
     // Text field.
     $component = $form_display->getComponent('field_test');
-    $expected = array('weight' => 1, 'type' => 'text_textfield');
-    $expected['settings'] = array('size' => 60, 'placeholder' => '');
-    $expected['third_party_settings'] = array();
+    $expected = ['weight' => 1, 'type' => 'text_textfield'];
+    $expected['settings'] = ['size' => 60, 'placeholder' => ''];
+    $expected['third_party_settings'] = [];
     $expected['region'] = 'content';
     $this->assertIdentical($expected, $component, 'Text field settings are correct.');
 
@@ -40,7 +40,7 @@ public function testWidgetSettings() {
     $component = $form_display->getComponent('field_test_two');
     $expected['type'] = 'number';
     $expected['weight'] = 1;
-    $expected['settings'] = array('placeholder' => '');
+    $expected['settings'] = ['placeholder' => ''];
     $this->assertIdentical($expected, $component);
 
     // Float field.
@@ -52,7 +52,7 @@ public function testWidgetSettings() {
     $component = $form_display->getComponent('field_test_email');
     $expected['type'] = 'email_default';
     $expected['weight'] = 6;
-    $expected['settings'] = array('placeholder' => '', 'size' => 60);
+    $expected['settings'] = ['placeholder' => '', 'size' => 60];
     $this->assertIdentical($expected, $component);
 
     // Link field.
@@ -65,28 +65,28 @@ public function testWidgetSettings() {
     $component = $form_display->getComponent('field_test_filefield');
     $expected['type'] = 'file_generic';
     $expected['weight'] = 8;
-    $expected['settings'] = array('progress_indicator' => 'bar');
+    $expected['settings'] = ['progress_indicator' => 'bar'];
     $this->assertIdentical($expected, $component);
 
     // Image field.
     $component = $form_display->getComponent('field_test_imagefield');
     $expected['type'] = 'image_image';
     $expected['weight'] = 9;
-    $expected['settings'] = array('progress_indicator' => 'bar', 'preview_image_style' => 'thumbnail');
+    $expected['settings'] = ['progress_indicator' => 'bar', 'preview_image_style' => 'thumbnail'];
     $this->assertIdentical($expected, $component);
 
     // Phone field.
     $component = $form_display->getComponent('field_test_phone');
     $expected['type'] = 'telephone_default';
     $expected['weight'] = 13;
-    $expected['settings'] = array('placeholder' => '');
+    $expected['settings'] = ['placeholder' => ''];
     $this->assertIdentical($expected, $component);
 
     // Date fields.
     $component = $form_display->getComponent('field_test_date');
     $expected['type'] = 'datetime_default';
     $expected['weight'] = 10;
-    $expected['settings'] = array();
+    $expected['settings'] = [];
     $this->assertIdentical($expected, $component);
 
     $component = $form_display->getComponent('field_test_datestamp');
diff --git a/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldFormatterSettingsTest.php b/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldFormatterSettingsTest.php
index 14f37cb41600e613ba58e189857c1d6e7fa88253..dd38569de144ebcf19bbfbb7093bd6056f7d96d3 100644
--- a/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldFormatterSettingsTest.php
+++ b/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldFormatterSettingsTest.php
@@ -96,40 +96,40 @@ protected function setUp() {
     // an "unsupported operand types" fatal).
     Database::getConnection('default', 'migrate')
       ->update('field_config_instance')
-      ->fields(array(
-        'data' => serialize(array (
+      ->fields([
+        'data' => serialize( [
           'label' => 'Body',
           'widget' =>
-            array (
+             [
               'type' => 'text_textarea_with_summary',
               'settings' =>
-                array (
+                 [
                   'rows' => 20,
                   'summary_rows' => 5,
-                ),
+                ],
               'weight' => -4,
               'module' => 'text',
-            ),
+            ],
           'settings' =>
-            array (
+             [
               'display_summary' => TRUE,
               'text_processing' => 1,
               'user_register_form' => FALSE,
-            ),
+            ],
           'display' =>
-            array (
+             [
               'default' =>
-                array (
+                 [
                   'label' => 'hidden',
                   'type' => 'text_default',
                   'settings' =>
-                    array (
-                    ),
+                     [
+                    ],
                   'module' => 'text',
                   'weight' => 0,
-                ),
+                ],
               'teaser' =>
-                array (
+                 [
                   'label' => 'hidden',
                   'type' => 'text_summary_or_trimmed',
                   // settings is always expected to be an array. Making it NULL
@@ -137,12 +137,12 @@ protected function setUp() {
                   'settings' => NULL,
                   'module' => 'text',
                   'weight' => 0,
-                ),
-            ),
+                ],
+            ],
           'required' => FALSE,
           'description' => '',
-        )),
-      ))
+        ]),
+      ])
       ->condition('entity_type', 'node')
       ->condition('bundle', 'article')
       ->condition('field_name', 'body')
diff --git a/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldInstanceTest.php b/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldInstanceTest.php
index c50c3241fbbdc323fa06cb33adb157cb667ed3b3..1e3df9e4fc8b01ba371ada7ba76af260460dbcb3 100644
--- a/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldInstanceTest.php
+++ b/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldInstanceTest.php
@@ -21,7 +21,7 @@ class MigrateFieldInstanceTest extends MigrateDrupal7TestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'comment',
     'datetime',
     'file',
@@ -32,7 +32,7 @@ class MigrateFieldInstanceTest extends MigrateDrupal7TestBase {
     'taxonomy',
     'telephone',
     'text',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -57,16 +57,16 @@ protected function setUp() {
    *   The node type ID.
    */
   protected function createType($id) {
-    NodeType::create(array(
+    NodeType::create([
       'type' => $id,
       'label' => $this->randomString(),
-    ))->save();
+    ])->save();
 
-    CommentType::create(array(
+    CommentType::create([
       'id' => 'comment_node_' . $id,
       'label' => $this->randomString(),
       'target_entity_type_id' => 'node',
-    ))->save();
+    ])->save();
   }
 
   /**
diff --git a/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldInstanceWidgetSettingsTest.php b/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldInstanceWidgetSettingsTest.php
index 7f2e0244f82df87e7c957cd611f039bf28abf05d..5a47e38ef722b4e7ee9e93fc60ec283b6d6558a3 100644
--- a/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldInstanceWidgetSettingsTest.php
+++ b/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldInstanceWidgetSettingsTest.php
@@ -18,7 +18,7 @@ class MigrateFieldInstanceWidgetSettingsTest extends MigrateDrupal7TestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'comment',
     'datetime',
     'field',
@@ -29,7 +29,7 @@ class MigrateFieldInstanceWidgetSettingsTest extends MigrateDrupal7TestBase {
     'taxonomy',
     'telephone',
     'text',
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldTest.php b/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldTest.php
index 4a0f8cde5694f9b30ceac8ccbc2a99a4d03b6501..ab2fe8e12589f6bb8f1aca6845b4b7564a6781a6 100644
--- a/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldTest.php
+++ b/core/modules/field/tests/src/Kernel/Migrate/d7/MigrateFieldTest.php
@@ -18,7 +18,7 @@ class MigrateFieldTest extends MigrateDrupal7TestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'comment',
     'datetime',
     'file',
@@ -29,7 +29,7 @@ class MigrateFieldTest extends MigrateDrupal7TestBase {
     'taxonomy',
     'telephone',
     'text',
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/field/tests/src/Kernel/Number/NumberItemTest.php b/core/modules/field/tests/src/Kernel/Number/NumberItemTest.php
index 25b99bbe7dfb52bf0f1336f9ccbc933b01b19092..578eeda9c639bc0239ee1f03f8a6b6d72e640d04 100644
--- a/core/modules/field/tests/src/Kernel/Number/NumberItemTest.php
+++ b/core/modules/field/tests/src/Kernel/Number/NumberItemTest.php
@@ -21,18 +21,18 @@ class NumberItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array();
+  public static $modules = [];
 
   protected function setUp() {
     parent::setUp();
 
     // Create number field storages and fields for validation.
-    foreach (array('integer', 'float', 'decimal') as $type) {
-      FieldStorageConfig::create(array(
+    foreach (['integer', 'float', 'decimal'] as $type) {
+      FieldStorageConfig::create([
         'entity_type' => 'entity_test',
         'field_name' => 'field_' . $type,
         'type' => $type,
-      ))->save();
+      ])->save();
       FieldConfig::create([
         'entity_type' => 'entity_test',
         'field_name' => 'field_' . $type,
diff --git a/core/modules/field/tests/src/Kernel/ShapeItemTest.php b/core/modules/field/tests/src/Kernel/ShapeItemTest.php
index 644a15f14657ecce9ebccaff696dc7fd06bf45ab..80ab04f3a9bc1a7f537d1dae585cbb66f0f7219b 100644
--- a/core/modules/field/tests/src/Kernel/ShapeItemTest.php
+++ b/core/modules/field/tests/src/Kernel/ShapeItemTest.php
@@ -20,7 +20,7 @@ class ShapeItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test');
+  public static $modules = ['field_test'];
 
   /**
    * The name of the field to use in this test.
@@ -33,11 +33,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create a 'shape' field and storage for validation.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'entity_test',
       'type' => 'shape',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => $this->fieldName,
diff --git a/core/modules/field/tests/src/Kernel/String/RawStringFormatterTest.php b/core/modules/field/tests/src/Kernel/String/RawStringFormatterTest.php
index 02d72d047323ba44e612b2b5ced794fb088df37e..1000d640789f4c6b548e58dbf7a2c629065bf949 100644
--- a/core/modules/field/tests/src/Kernel/String/RawStringFormatterTest.php
+++ b/core/modules/field/tests/src/Kernel/String/RawStringFormatterTest.php
@@ -23,7 +23,7 @@ class RawStringFormatterTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field', 'text', 'entity_test', 'system', 'filter', 'user');
+  public static $modules = ['field', 'text', 'entity_test', 'system', 'filter', 'user'];
 
   /**
    * @var string
@@ -52,7 +52,7 @@ protected function setUp() {
     parent::setUp();
 
     // Configure the theme system.
-    $this->installConfig(array('system', 'field'));
+    $this->installConfig(['system', 'field']);
     \Drupal::service('router.builder')->rebuild();
     $this->installEntitySchema('entity_test');
 
@@ -60,25 +60,25 @@ protected function setUp() {
     $this->bundle = $this->entityType;
     $this->fieldName = Unicode::strtolower($this->randomMachineName());
 
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => $this->entityType,
       'type' => 'string_long',
-    ));
+    ]);
     $field_storage->save();
 
-    $instance = FieldConfig::create(array(
+    $instance = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => $this->bundle,
       'label' => $this->randomMachineName(),
-    ));
+    ]);
     $instance->save();
 
     $this->display = entity_get_display($this->entityType, $this->bundle, 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'string',
-        'settings' => array(),
-      ));
+        'settings' => [],
+      ]);
     $this->display->save();
   }
 
@@ -107,7 +107,7 @@ public function testStringFormatter() {
     $value .= "\n\n<strong>" . $this->randomString() . '</strong>';
     $value .= "\n\n" . $this->randomString();
 
-    $entity = EntityTest::create(array());
+    $entity = EntityTest::create([]);
     $entity->{$this->fieldName}->value = $value;
 
     // Verify that all HTML is escaped and newlines are retained.
diff --git a/core/modules/field/tests/src/Kernel/String/StringFormatterTest.php b/core/modules/field/tests/src/Kernel/String/StringFormatterTest.php
index b52a92fd28f1439bd3741b4160b3e9fe030d9ca8..b09eb58c09133e89aee5d8b06e75c7412d12f071 100644
--- a/core/modules/field/tests/src/Kernel/String/StringFormatterTest.php
+++ b/core/modules/field/tests/src/Kernel/String/StringFormatterTest.php
@@ -23,7 +23,7 @@ class StringFormatterTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field', 'text', 'entity_test', 'system', 'filter', 'user');
+  public static $modules = ['field', 'text', 'entity_test', 'system', 'filter', 'user'];
 
   /**
    * @var string
@@ -52,7 +52,7 @@ protected function setUp() {
     parent::setUp();
 
     // Configure the theme system.
-    $this->installConfig(array('system', 'field'));
+    $this->installConfig(['system', 'field']);
     \Drupal::service('router.builder')->rebuild();
     $this->installEntitySchema('entity_test_rev');
 
@@ -60,25 +60,25 @@ protected function setUp() {
     $this->bundle = $this->entityType;
     $this->fieldName = Unicode::strtolower($this->randomMachineName());
 
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => $this->entityType,
       'type' => 'string',
-    ));
+    ]);
     $field_storage->save();
 
-    $instance = FieldConfig::create(array(
+    $instance = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => $this->bundle,
       'label' => $this->randomMachineName(),
-    ));
+    ]);
     $instance->save();
 
     $this->display = entity_get_display($this->entityType, $this->bundle, 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'string',
-        'settings' => array(),
-      ));
+        'settings' => [],
+      ]);
     $this->display->save();
   }
 
@@ -107,7 +107,7 @@ public function testStringFormatter() {
     $value .= "\n\n<strong>" . $this->randomString() . '</strong>';
     $value .= "\n\n" . $this->randomString();
 
-    $entity = EntityTestRev::create(array());
+    $entity = EntityTestRev::create([]);
     $entity->{$this->fieldName}->value = $value;
 
     // Verify that all HTML is escaped and newlines are retained.
diff --git a/core/modules/field/tests/src/Kernel/TestItemTest.php b/core/modules/field/tests/src/Kernel/TestItemTest.php
index 6766b4099f25bfe1c1604b7c08fbb50f38a147e5..73a99486b6cb013aee02c8985bd57867a6a2412a 100644
--- a/core/modules/field/tests/src/Kernel/TestItemTest.php
+++ b/core/modules/field/tests/src/Kernel/TestItemTest.php
@@ -21,7 +21,7 @@ class TestItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test');
+  public static $modules = ['field_test'];
 
   /**
    * The name of the field to use in this test.
@@ -34,11 +34,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create a 'test_field' field and storage for validation.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'entity_test',
       'type' => 'test_field',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => $this->fieldName,
@@ -76,19 +76,19 @@ public function testTestItem() {
     $this->assertEqual($entity->{$this->fieldName}->value, $new_value);
 
     // Test the schema for this field type.
-    $expected_schema = array(
-      'columns' => array(
-        'value' => array(
+    $expected_schema = [
+      'columns' => [
+        'value' => [
           'type' => 'int',
           'size' => 'medium',
-        ),
-      ),
-      'unique keys' => array(),
-      'indexes' => array(
-        'value' => array('value'),
-      ),
-      'foreign keys' => array(),
-    );
+        ],
+      ],
+      'unique keys' => [],
+      'indexes' => [
+        'value' => ['value'],
+      ],
+      'foreign keys' => [],
+    ];
     $field_schema = BaseFieldDefinition::create('test_field')->getSchema();
     $this->assertEqual($field_schema, $expected_schema);
   }
diff --git a/core/modules/field/tests/src/Kernel/TestItemWithDependenciesTest.php b/core/modules/field/tests/src/Kernel/TestItemWithDependenciesTest.php
index 9766a067fbacc7904291fc3f85f5eab16aac5b7e..d1a269a6a26c44a79a548d288eec569caa60431b 100644
--- a/core/modules/field/tests/src/Kernel/TestItemWithDependenciesTest.php
+++ b/core/modules/field/tests/src/Kernel/TestItemWithDependenciesTest.php
@@ -17,7 +17,7 @@ class TestItemWithDependenciesTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test');
+  public static $modules = ['field_test'];
 
   /**
    * The name of the field to use in this test.
@@ -31,11 +31,11 @@ class TestItemWithDependenciesTest extends FieldKernelTestBase {
    */
   public function testTestItemWithDepenencies() {
     // Create a 'test_field_with_dependencies' field and storage for validation.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'entity_test',
       'type' => 'test_field_with_dependencies',
-    ))->save();
+    ])->save();
     $field = FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => $this->fieldName,
diff --git a/core/modules/field/tests/src/Kernel/TestObjectItemTest.php b/core/modules/field/tests/src/Kernel/TestObjectItemTest.php
index 8a7875581c9b35fe40837596d90d24f4e09c1a0c..1ac87fc3b7fcb09a41a859fad0151f1ee7b277c7 100644
--- a/core/modules/field/tests/src/Kernel/TestObjectItemTest.php
+++ b/core/modules/field/tests/src/Kernel/TestObjectItemTest.php
@@ -18,7 +18,7 @@ class TestObjectItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test');
+  public static $modules = ['field_test'];
 
   /**
    * {@inheritdoc}
@@ -27,11 +27,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create a 'test_field' field and storage for validation.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_test',
       'entity_type' => 'entity_test',
       'type' => 'test_object_field',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_test',
diff --git a/core/modules/field/tests/src/Kernel/Timestamp/TimestampFormatterTest.php b/core/modules/field/tests/src/Kernel/Timestamp/TimestampFormatterTest.php
index ee97cabbf8e7894beca75ce3fabccf8bb8291034..f71be314abf3fc94960649e8967b5f773b12332f 100644
--- a/core/modules/field/tests/src/Kernel/Timestamp/TimestampFormatterTest.php
+++ b/core/modules/field/tests/src/Kernel/Timestamp/TimestampFormatterTest.php
@@ -140,7 +140,7 @@ public function testTimestampFormatter() {
   public function testTimestampAgoFormatter() {
     $data = [];
 
-    foreach (array(1, 2, 3, 4, 5, 6) as $granularity) {
+    foreach ([1, 2, 3, 4, 5, 6] as $granularity) {
       $data[] = [
         'future_format' => '@interval hence',
         'past_format' => '@interval ago',
diff --git a/core/modules/field/tests/src/Kernel/TranslationTest.php b/core/modules/field/tests/src/Kernel/TranslationTest.php
index 78172a38217a9d597deac6c0e0ff30584ce9d000..f1fffe60f7addd263200c1a37647b4305ff1f149 100644
--- a/core/modules/field/tests/src/Kernel/TranslationTest.php
+++ b/core/modules/field/tests/src/Kernel/TranslationTest.php
@@ -23,7 +23,7 @@ class TranslationTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'node');
+  public static $modules = ['language', 'node'];
 
   /**
    * The name of the field to use in this test.
@@ -73,33 +73,33 @@ class TranslationTest extends FieldKernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->installConfig(array('language'));
+    $this->installConfig(['language']);
 
     $this->fieldName = Unicode::strtolower($this->randomMachineName());
 
     $this->entityType = 'entity_test';
 
-    $this->fieldStorageDefinition = array(
+    $this->fieldStorageDefinition = [
       'field_name' => $this->fieldName,
       'entity_type' => $this->entityType,
       'type' => 'test_field',
       'cardinality' => 4,
-    );
+    ];
     $this->fieldStorage = FieldStorageConfig::create($this->fieldStorageDefinition);
     $this->fieldStorage->save();
 
-    $this->fieldDefinition = array(
+    $this->fieldDefinition = [
       'field_storage' => $this->fieldStorage,
       'bundle' => 'entity_test',
-    );
+    ];
     $this->field = FieldConfig::create($this->fieldDefinition);
     $this->field->save();
 
     for ($i = 0; $i < 3; ++$i) {
-      ConfigurableLanguage::create(array(
+      ConfigurableLanguage::create([
         'id' => 'l' . $i,
         'label' => $this->randomString(),
-      ))->save();
+      ])->save();
     }
   }
 
@@ -117,8 +117,8 @@ function testTranslatableFieldSaveLoad() {
     field_test_entity_info_translatable($entity_type_id, TRUE);
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type_id)
-      ->create(array('type' => $this->field->getTargetBundle()));
-    $field_translations = array();
+      ->create(['type' => $this->field->getTargetBundle()]);
+    $field_translations = [];
     $available_langcodes = array_keys($this->container->get('language_manager')->getLanguages());
     $entity->langcode->value = reset($available_langcodes);
     foreach ($available_langcodes as $langcode) {
@@ -136,7 +136,7 @@ function testTranslatableFieldSaveLoad() {
       foreach ($items as $delta => $item) {
         $result = $result && $item['value'] == $entity->getTranslation($langcode)->{$this->fieldName}[$delta]->value;
       }
-      $this->assertTrue($result, format_string('%language translation correctly handled.', array('%language' => $langcode)));
+      $this->assertTrue($result, format_string('%language translation correctly handled.', ['%language' => $langcode]));
     }
 
     // Test default values.
@@ -148,7 +148,7 @@ function testTranslatableFieldSaveLoad() {
 
     $field_definition = $this->fieldDefinition;
     $field_definition['field_storage'] = $field_storage;
-    $field_definition['default_value'] = array(array('value' => rand(1, 127)));
+    $field_definition['default_value'] = [['value' => rand(1, 127)]];
     $field = FieldConfig::create($field_definition);
     $field->save();
 
@@ -156,7 +156,7 @@ function testTranslatableFieldSaveLoad() {
     asort($translation_langcodes);
     $translation_langcodes = array_values($translation_langcodes);
 
-    $values = array('type' => $field->getTargetBundle(), 'langcode' => $translation_langcodes[0]);
+    $values = ['type' => $field->getTargetBundle(), 'langcode' => $translation_langcodes[0]];
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type_id)
       ->create($values);
@@ -173,11 +173,11 @@ function testTranslatableFieldSaveLoad() {
     // @todo Test every translation once the Entity Translation API allows for
     //   multilingual defaults.
     $langcode = $entity->language()->getId();
-    $this->assertEqual($entity->getTranslation($langcode)->{$field_name_default}->getValue(), $field->getDefaultValueLiteral(), format_string('Default value correctly populated for language %language.', array('%language' => $langcode)));
+    $this->assertEqual($entity->getTranslation($langcode)->{$field_name_default}->getValue(), $field->getDefaultValueLiteral(), format_string('Default value correctly populated for language %language.', ['%language' => $langcode]));
 
     // Check that explicit empty values are not overridden with default values.
-    foreach (array(NULL, array()) as $empty_items) {
-      $values = array('type' => $field->getTargetBundle(), 'langcode' => $translation_langcodes[0]);
+    foreach ([NULL, []] as $empty_items) {
+      $values = ['type' => $field->getTargetBundle(), 'langcode' => $translation_langcodes[0]];
       $entity = entity_create($entity_type_id, $values);
       foreach ($translation_langcodes as $langcode) {
         $values[$this->fieldName][$langcode] = $this->_generateTestFieldValues($this->fieldStorage->getCardinality());
@@ -188,7 +188,7 @@ function testTranslatableFieldSaveLoad() {
       }
 
       foreach ($entity->getTranslationLanguages() as $langcode => $language) {
-        $this->assertEquals([], $entity->getTranslation($langcode)->{$field_name_default}->getValue(), format_string('Empty value correctly populated for language %language.', array('%language' => $langcode)));
+        $this->assertEquals([], $entity->getTranslation($langcode)->{$field_name_default}->getValue(), format_string('Empty value correctly populated for language %language.', ['%language' => $langcode]));
       }
     }
   }
diff --git a/core/modules/field/tests/src/Kernel/WidgetPluginManagerTest.php b/core/modules/field/tests/src/Kernel/WidgetPluginManagerTest.php
index 3eff2ca248f3ed84e504346b5f8b09bc41b623ee..47edb9f77467862cdc03e83bcf68d4622d9926ea 100644
--- a/core/modules/field/tests/src/Kernel/WidgetPluginManagerTest.php
+++ b/core/modules/field/tests/src/Kernel/WidgetPluginManagerTest.php
@@ -33,13 +33,13 @@ public function testNotApplicableFallback() {
       // Set a name that will make isApplicable() return TRUE.
       ->setName('field_multiwidgetfield');
 
-    $widget_options = array(
+    $widget_options = [
       'field_definition' => $base_field_definition,
       'form_mode' => 'default',
-      'configuration' => array(
+      'configuration' => [
         'type' => 'test_field_widget_multiple',
-      ),
-    );
+      ],
+    ];
 
     $instance = $widget_plugin_manager->getInstance($widget_options);
     $this->assertEqual($instance->getPluginId(), 'test_field_widget_multiple');
diff --git a/core/modules/field/tests/src/Unit/FieldConfigEntityUnitTest.php b/core/modules/field/tests/src/Unit/FieldConfigEntityUnitTest.php
index 3f687d4b9fcf392cf224c13d3e9f9249c311f5d5..3a0c8aa75cef63e7b3cdf316ca338b88a03af098 100644
--- a/core/modules/field/tests/src/Unit/FieldConfigEntityUnitTest.php
+++ b/core/modules/field/tests/src/Unit/FieldConfigEntityUnitTest.php
@@ -100,14 +100,14 @@ protected function setUp() {
       ->will($this->returnValue('field_test'));
     $this->fieldStorage->expects($this->any())
       ->method('getSettings')
-      ->willReturn(array());
+      ->willReturn([]);
     // Place the field in the mocked entity manager's field registry.
     $this->entityManager->expects($this->any())
       ->method('getFieldStorageDefinitions')
       ->with('test_entity_type')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         $this->fieldStorage->getName() => $this->fieldStorage,
-      )));
+      ]));
   }
 
   /**
@@ -118,7 +118,7 @@ public function testCalculateDependencies() {
     $target_entity_type = $this->getMock('\Drupal\Core\Entity\EntityTypeInterface');
     $target_entity_type->expects($this->any())
       ->method('getBundleConfigDependency')
-      ->will($this->returnValue(array('type' => 'config', 'name' => 'test.test_entity_type.id')));
+      ->will($this->returnValue(['type' => 'config', 'name' => 'test.test_entity_type.id']));
 
     $this->entityManager->expects($this->at(0))
       ->method('getDefinition')
@@ -146,12 +146,12 @@ public function testCalculateDependencies() {
       ->method('getConfigDependencyName')
       ->will($this->returnValue('field.storage.test_entity_type.test_field'));
 
-    $field = new FieldConfig(array(
+    $field = new FieldConfig([
       'field_name' => $this->fieldStorage->getName(),
       'entity_type' => 'test_entity_type',
       'bundle' => 'test_bundle',
       'field_type' => 'test_field',
-    ), $this->entityTypeId);
+    ], $this->entityTypeId);
     $dependencies = $field->calculateDependencies()->getDependencies();
     $this->assertContains('field.storage.test_entity_type.test_field', $dependencies['config']);
     $this->assertContains('test.test_entity_type.id', $dependencies['config']);
@@ -176,10 +176,10 @@ public function testCalculateDependenciesIncorrectBundle() {
       ->with('bundle_entity_type')
       ->will($this->returnValue($storage));
 
-    $target_entity_type = new EntityType(array(
+    $target_entity_type = new EntityType([
       'id' => 'test_entity_type',
       'bundle_entity_type' => 'bundle_entity_type',
-    ));
+    ]);
 
     $this->entityManager->expects($this->at(0))
       ->method('getDefinition')
@@ -203,12 +203,12 @@ public function testCalculateDependenciesIncorrectBundle() {
       ->with('test_field')
       ->willReturn(['provider' => 'test_module', 'config_dependencies' => ['module' => ['test_module2']], 'class' => '\Drupal\Tests\field\Unit\DependencyFieldItem']);
 
-    $field = new FieldConfig(array(
+    $field = new FieldConfig([
       'field_name' => $this->fieldStorage->getName(),
       'entity_type' => 'test_entity_type',
       'bundle' => 'test_bundle_not_exists',
       'field_type' => 'test_field',
-    ), $this->entityTypeId);
+    ], $this->entityTypeId);
     $field->calculateDependencies();
   }
 
@@ -245,14 +245,14 @@ public function testOnDependencyRemoval() {
    * @covers ::toArray
    */
   public function testToArray() {
-    $field = new FieldConfig(array(
+    $field = new FieldConfig([
       'field_name' => $this->fieldStorage->getName(),
       'entity_type' => 'test_entity_type',
       'bundle' => 'test_bundle',
       'field_type' => 'test_field',
-    ), $this->entityTypeId);
+    ], $this->entityTypeId);
 
-    $expected = array(
+    $expected = [
       'id' => 'test_entity_type.test_bundle.field_test',
       'uuid' => NULL,
       'status' => TRUE,
@@ -263,12 +263,12 @@ public function testToArray() {
       'label' => '',
       'description' => '',
       'required' => FALSE,
-      'default_value' => array(),
+      'default_value' => [],
       'default_value_callback' => '',
-      'settings' => array(),
-      'dependencies' => array(),
+      'settings' => [],
+      'dependencies' => [],
       'field_type' => 'test_field',
-    );
+    ];
     $this->entityManager->expects($this->any())
       ->method('getDefinition')
       ->with($this->entityTypeId)
@@ -279,7 +279,7 @@ public function testToArray() {
       ->will($this->returnValue('id'));
     $this->typedConfigManager->expects($this->once())
       ->method('getDefinition')
-      ->will($this->returnValue(array('mapping' => array_fill_keys(array_keys($expected), ''))));
+      ->will($this->returnValue(['mapping' => array_fill_keys(array_keys($expected), '')]));
 
     $export = $field->toArray();
     $this->assertEquals($expected, $export);
@@ -296,12 +296,12 @@ public function testGetType() {
     $this->fieldStorage->expects($this->never())
       ->method('getType');
 
-    $field = new FieldConfig(array(
+    $field = new FieldConfig([
       'field_name' => $this->fieldStorage->getName(),
       'entity_type' => 'test_entity_type',
       'bundle' => 'test_bundle',
       'field_type' => 'test_field',
-    ), $this->entityTypeId);
+    ], $this->entityTypeId);
 
     $this->assertEquals('test_field', $field->getType());
   }
diff --git a/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldSettingsTest.php b/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldSettingsTest.php
index edeef211224f11842890b465a87e9c61de6b1b69..df18fec0aad50b96a36084d47b8c736855c5bff7 100644
--- a/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldSettingsTest.php
+++ b/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldSettingsTest.php
@@ -36,32 +36,32 @@ public function testGetSettings($field_type, $field_settings, $allowed_values) {
    * Provides field settings for testGetSettings().
    */
   public function getSettingsProvider() {
-    return array(
-      array(
+    return [
+      [
         'list_integer',
-        array('allowed_values' => "1|One\n2|Two\n3"),
-        array(
+        ['allowed_values' => "1|One\n2|Two\n3"],
+        [
           '1' => 'One',
           '2' => 'Two',
           '3' => '3',
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'list_string',
-        array('allowed_values' => NULL),
-        array(),
-      ),
-      array(
+        ['allowed_values' => NULL],
+        [],
+      ],
+      [
         'list_float',
-        array('allowed_values' => ""),
-        array(),
-      ),
-      array(
+        ['allowed_values' => ""],
+        [],
+      ],
+      [
         'boolean',
-        array(),
-        array(),
-      ),
-    );
+        [],
+        [],
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/field_ui/field_ui.api.php b/core/modules/field_ui/field_ui.api.php
index 28cb246e69ecc16aca12c0fc210e792c73043e21..92cbaf2700ec017e31ea598fe6cd633d96a271ca 100644
--- a/core/modules/field_ui/field_ui.api.php
+++ b/core/modules/field_ui/field_ui.api.php
@@ -30,15 +30,15 @@
  * @see \Drupal\field_ui\DisplayOverView
  */
 function hook_field_formatter_third_party_settings_form(\Drupal\Core\Field\FormatterInterface $plugin, \Drupal\Core\Field\FieldDefinitionInterface $field_definition, $view_mode, $form, \Drupal\Core\Form\FormStateInterface $form_state) {
-  $element = array();
+  $element = [];
   // Add a 'my_setting' checkbox to the settings form for 'foo_formatter' field
   // formatters.
   if ($plugin->getPluginId() == 'foo_formatter') {
-    $element['my_setting'] = array(
+    $element['my_setting'] = [
       '#type' => 'checkbox',
       '#title' => t('My setting'),
       '#default_value' => $plugin->getThirdPartySetting('my_module', 'my_setting'),
-    );
+    ];
   }
   return $element;
 }
@@ -63,15 +63,15 @@ function hook_field_formatter_third_party_settings_form(\Drupal\Core\Field\Forma
  * @see \Drupal\field_ui\FormDisplayOverView
  */
 function hook_field_widget_third_party_settings_form(\Drupal\Core\Field\WidgetInterface $plugin, \Drupal\Core\Field\FieldDefinitionInterface $field_definition, $form_mode, $form, \Drupal\Core\Form\FormStateInterface $form_state) {
-  $element = array();
+  $element = [];
   // Add a 'my_setting' checkbox to the settings form for 'foo_widget' field
   // widgets.
   if ($plugin->getPluginId() == 'foo_widget') {
-    $element['my_setting'] = array(
+    $element['my_setting'] = [
       '#type' => 'checkbox',
       '#title' => t('My setting'),
       '#default_value' => $plugin->getThirdPartySetting('my_module', 'my_setting'),
-    );
+    ];
   }
   return $element;
 }
diff --git a/core/modules/field_ui/field_ui.module b/core/modules/field_ui/field_ui.module
index 5134cad26ef4be10a69ac76dae8f458259228fc0..79b3f151a59e687a5dbab92ad42b762add86dfca 100644
--- a/core/modules/field_ui/field_ui.module
+++ b/core/modules/field_ui/field_ui.module
@@ -22,7 +22,7 @@ function field_ui_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.field_ui':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Field UI module provides an administrative user interface (UI) for managing and displaying fields. Fields can be attached to most content entity sub-types. Different field types, widgets, and formatters are provided by the modules enabled on your site, and managed by the Field module. For background information and terminology related to fields and entities, see the <a href=":field">Field module help page</a>. For more information about the Field UI, see the <a href=":field_ui_docs">online documentation for the Field UI module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui_docs' => 'https://www.drupal.org/documentation/modules/field-ui')) . '</p>';
+      $output .= '<p>' . t('The Field UI module provides an administrative user interface (UI) for managing and displaying fields. Fields can be attached to most content entity sub-types. Different field types, widgets, and formatters are provided by the modules enabled on your site, and managed by the Field module. For background information and terminology related to fields and entities, see the <a href=":field">Field module help page</a>. For more information about the Field UI, see the <a href=":field_ui_docs">online documentation for the Field UI module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui_docs' => 'https://www.drupal.org/documentation/modules/field-ui']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Creating a field') . '</dt>';
@@ -34,9 +34,9 @@ function field_ui_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<dt>' . t('Configuring field display') . '</dt>';
       $output .= '<dd>' . t('On the <em>Manage display</em> page of your entity type or sub-type, you can configure how each field is displayed by default and in each view mode. If your entity type has multiple view modes, you can toggle between the view modes at the top of the page, and you can toggle whether each view mode uses the default settings or custom settings in the <em>Custom display settings</em> section. For each field in each view mode, you can choose whether and how to display the label of the field from the <em>Label</em> drop-down list. You can also select the formatter to use for display; some formatters have configuration options, which you can edit using the Edit button (which looks like a wheel). You can also change the display order of fields. You can exclude a field from a specific view mode by choosing <em>Hidden</em> from the formatter drop-down list, or by dragging it into the <em>Disabled</em> section.') . '</dd>';
       $output .= '<dt>' . t('Configuring view and form modes') . '</dt>';
-      $output .= '<dd>' . t('You can add, edit, and delete view modes for entities on the <a href=":view_modes">View modes page</a>, and you can add, edit, and delete form modes for entities on the <a href=":form_modes">Form modes page</a>. Once you have defined a view mode or form mode for an entity type, it will be available on the Manage display or Manage form display page for each sub-type of that entity.', array(':view_modes' => \Drupal::url('entity.entity_view_mode.collection'), ':form_modes' => \Drupal::url('entity.entity_form_mode.collection'))) . '</dd>';
+      $output .= '<dd>' . t('You can add, edit, and delete view modes for entities on the <a href=":view_modes">View modes page</a>, and you can add, edit, and delete form modes for entities on the <a href=":form_modes">Form modes page</a>. Once you have defined a view mode or form mode for an entity type, it will be available on the Manage display or Manage form display page for each sub-type of that entity.', [':view_modes' => \Drupal::url('entity.entity_view_mode.collection'), ':form_modes' => \Drupal::url('entity.entity_form_mode.collection')]) . '</dd>';
       $output .= '<dt>' . t('Listing fields') . '</dt>';
-      $output .= '<dd>' . t('There are two reports available that list the fields defined on your site. The <a href=":entity-list" title="Entities field list report">Entities</a> report lists all your fields, showing the field machine names, types, and the entity types or sub-types they are used on (each sub-type links to the Manage fields page). If the <a href=":views">Views</a> and <a href=":views-ui">Views UI</a> modules are enabled, the <a href=":views-list" title="Used in views field list report">Used in views</a> report lists each field that is used in a view, with a link to edit that view.', array(':entity-list' => \Drupal::url('entity.field_storage_config.collection'), ':views-list' => (\Drupal::moduleHandler()->moduleExists('views_ui')) ? \Drupal::url('views_ui.reports_fields') : '#', ':views' => (\Drupal::moduleHandler()->moduleExists('views')) ? \Drupal::url('help.page', array('name' => 'views')) : '#', ':views-ui' => (\Drupal::moduleHandler()->moduleExists('views_ui')) ? \Drupal::url('help.page', array('name' => 'views_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('There are two reports available that list the fields defined on your site. The <a href=":entity-list" title="Entities field list report">Entities</a> report lists all your fields, showing the field machine names, types, and the entity types or sub-types they are used on (each sub-type links to the Manage fields page). If the <a href=":views">Views</a> and <a href=":views-ui">Views UI</a> modules are enabled, the <a href=":views-list" title="Used in views field list report">Used in views</a> report lists each field that is used in a view, with a link to edit that view.', [':entity-list' => \Drupal::url('entity.field_storage_config.collection'), ':views-list' => (\Drupal::moduleHandler()->moduleExists('views_ui')) ? \Drupal::url('views_ui.reports_fields') : '#', ':views' => (\Drupal::moduleHandler()->moduleExists('views')) ? \Drupal::url('help.page', ['name' => 'views']) : '#', ':views-ui' => (\Drupal::moduleHandler()->moduleExists('views_ui')) ? \Drupal::url('help.page', ['name' => 'views_ui']) : '#']) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -49,21 +49,21 @@ function field_ui_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function field_ui_theme() {
-  return array(
-    'field_ui_table' => array(
-      'variables' => array(
+  return [
+    'field_ui_table' => [
+      'variables' => [
         'header' => NULL,
         'rows' => NULL,
         'footer' => NULL,
-        'attributes' => array(),
+        'attributes' => [],
         'caption' => NULL,
-        'colgroups' => array(),
+        'colgroups' => [],
         'sticky' => FALSE,
         'responsive' => TRUE,
         'empty' => '',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
 
 /**
@@ -138,38 +138,38 @@ function field_ui_form_node_type_form_alter(&$form, FormStateInterface $form_sta
  * Implements hook_entity_operation().
  */
 function field_ui_entity_operation(EntityInterface $entity) {
-  $operations = array();
+  $operations = [];
   $info = $entity->getEntityType();
   // Add manage fields and display links if this entity type is the bundle
   // of another and that type has field UI enabled.
   if (($bundle_of = $info->getBundleOf()) && \Drupal::entityManager()->getDefinition($bundle_of)->get('field_ui_base_route')) {
     $account = \Drupal::currentUser();
     if ($account->hasPermission('administer ' . $bundle_of . ' fields')) {
-      $operations['manage-fields'] = array(
+      $operations['manage-fields'] = [
         'title' => t('Manage fields'),
         'weight' => 15,
-        'url' => Url::fromRoute("entity.{$bundle_of}.field_ui_fields", array(
+        'url' => Url::fromRoute("entity.{$bundle_of}.field_ui_fields", [
           $entity->getEntityTypeId() => $entity->id(),
-        )),
-      );
+        ]),
+      ];
     }
     if ($account->hasPermission('administer ' . $bundle_of . ' form display')) {
-      $operations['manage-form-display'] = array(
+      $operations['manage-form-display'] = [
         'title' => t('Manage form display'),
         'weight' => 20,
-        'url' => Url::fromRoute("entity.entity_form_display.{$bundle_of}.default", array(
+        'url' => Url::fromRoute("entity.entity_form_display.{$bundle_of}.default", [
           $entity->getEntityTypeId() => $entity->id(),
-        )),
-      );
+        ]),
+      ];
     }
     if ($account->hasPermission('administer ' . $bundle_of . ' display')) {
-      $operations['manage-display'] = array(
+      $operations['manage-display'] = [
         'title' => t('Manage display'),
         'weight' => 25,
-        'url' => Url::fromRoute("entity.entity_view_display.{$bundle_of}.default", array(
+        'url' => Url::fromRoute("entity.entity_view_display.{$bundle_of}.default", [
           $entity->getEntityTypeId() => $entity->id(),
-        )),
-      );
+        ]),
+      ];
     }
   }
 
diff --git a/core/modules/field_ui/src/Controller/EntityDisplayModeController.php b/core/modules/field_ui/src/Controller/EntityDisplayModeController.php
index 545e1911ae0444e9df2f9dd4a02427947b1ef5c0..b4a608acd5ae9e53cf7124ef619fd8817b623d0c 100644
--- a/core/modules/field_ui/src/Controller/EntityDisplayModeController.php
+++ b/core/modules/field_ui/src/Controller/EntityDisplayModeController.php
@@ -17,20 +17,20 @@ class EntityDisplayModeController extends ControllerBase {
    *   A list of entity types to add a view mode for.
    */
   public function viewModeTypeSelection() {
-    $entity_types = array();
+    $entity_types = [];
     foreach ($this->entityManager()->getDefinitions() as $entity_type_id => $entity_type) {
       if ($entity_type->get('field_ui_base_route') && $entity_type->hasViewBuilderClass()) {
-        $entity_types[$entity_type_id] = array(
+        $entity_types[$entity_type_id] = [
           'title' => $entity_type->getLabel(),
-          'url' => Url::fromRoute('entity.entity_view_mode.add_form', array('entity_type_id' => $entity_type_id)),
-          'localized_options' => array(),
-        );
+          'url' => Url::fromRoute('entity.entity_view_mode.add_form', ['entity_type_id' => $entity_type_id]),
+          'localized_options' => [],
+        ];
       }
     }
-    return array(
+    return [
       '#theme' => 'admin_block_content',
       '#content' => $entity_types,
-    );
+    ];
   }
 
   /**
@@ -40,20 +40,20 @@ public function viewModeTypeSelection() {
    *   A list of entity types to add a form mode for.
    */
   public function formModeTypeSelection() {
-    $entity_types = array();
+    $entity_types = [];
     foreach ($this->entityManager()->getDefinitions() as $entity_type_id => $entity_type) {
       if ($entity_type->get('field_ui_base_route') && $entity_type->hasFormClasses()) {
-        $entity_types[$entity_type_id] = array(
+        $entity_types[$entity_type_id] = [
           'title' => $entity_type->getLabel(),
-          'url' => Url::fromRoute('entity.entity_form_mode.add_form', array('entity_type_id' => $entity_type_id)),
-          'localized_options' => array(),
-        );
+          'url' => Url::fromRoute('entity.entity_form_mode.add_form', ['entity_type_id' => $entity_type_id]),
+          'localized_options' => [],
+        ];
       }
     }
-    return array(
+    return [
       '#theme' => 'admin_block_content',
       '#content' => $entity_types,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/field_ui/src/Element/FieldUiTable.php b/core/modules/field_ui/src/Element/FieldUiTable.php
index 05d5d04e5340abf570c4a67aa36c371e52874c22..f8f3146759ea53dcea41fadde6bcc1bcef7f9e46 100644
--- a/core/modules/field_ui/src/Element/FieldUiTable.php
+++ b/core/modules/field_ui/src/Element/FieldUiTable.php
@@ -42,7 +42,7 @@ public function getInfo() {
    * @see \Drupal\Core\Render\Element\Table::preRenderTable()
    */
   public static function tablePreRender($elements) {
-    $js_settings = array();
+    $js_settings = [];
 
     // For each region, build the tree structure from the weight and parenting
     // data contained in the flat form structure, to determine row order and
diff --git a/core/modules/field_ui/src/EntityDisplayModeListBuilder.php b/core/modules/field_ui/src/EntityDisplayModeListBuilder.php
index d02505536885b2c312e9c68a4a6d3c48f723489f..c9d89662785b7242698b4186c7f0c1d7a77d64ed 100644
--- a/core/modules/field_ui/src/EntityDisplayModeListBuilder.php
+++ b/core/modules/field_ui/src/EntityDisplayModeListBuilder.php
@@ -71,7 +71,7 @@ public function buildRow(EntityInterface $entity) {
    * {@inheritdoc}
    */
   public function load() {
-    $entities = array();
+    $entities = [];
     foreach (parent::load() as $entity) {
       $entities[$entity->getTargetType()][] = $entity;
     }
@@ -82,7 +82,7 @@ public function load() {
    * {@inheritdoc}
    */
   public function render() {
-    $build = array();
+    $build = [];
     foreach ($this->load() as $entity_type => $entities) {
       if (!isset($this->entityTypes[$entity_type])) {
         continue;
@@ -93,12 +93,12 @@ public function render() {
         continue;
       }
 
-      $table = array(
+      $table = [
         '#prefix' => '<h2>' . $this->entityTypes[$entity_type]->getLabel() . '</h2>',
         '#type' => 'table',
         '#header' => $this->buildHeader(),
-        '#rows' => array(),
-      );
+        '#rows' => [],
+      ];
       foreach ($entities as $entity) {
         if ($row = $this->buildRow($entity)) {
           $table['#rows'][$entity->id()] = $row;
@@ -110,15 +110,15 @@ public function render() {
         $table['#weight'] = -10;
       }
 
-      $short_type = str_replace(array('entity_', '_mode'), '', $this->entityTypeId);
-      $table['#rows']['_add_new'][] = array(
-        'data' => array(
+      $short_type = str_replace(['entity_', '_mode'], '', $this->entityTypeId);
+      $table['#rows']['_add_new'][] = [
+        'data' => [
           '#type' => 'link',
           '#url' => Url::fromRoute($short_type == 'view' ? 'entity.entity_view_mode.add_form' : 'entity.entity_form_mode.add_form', ['entity_type_id' => $entity_type]),
-          '#title' => $this->t('Add new %label @entity-type', array('%label' => $this->entityTypes[$entity_type]->getLabel(), '@entity-type' => $this->entityType->getLowercaseLabel())),
-        ),
+          '#title' => $this->t('Add new %label @entity-type', ['%label' => $this->entityTypes[$entity_type]->getLabel(), '@entity-type' => $this->entityType->getLowercaseLabel()]),
+        ],
         'colspan' => count($table['#header']),
-      );
+      ];
       $build[$entity_type] = $table;
     }
     return $build;
diff --git a/core/modules/field_ui/src/FieldConfigListBuilder.php b/core/modules/field_ui/src/FieldConfigListBuilder.php
index c8739daef92845603d01755998b54ca1d0ed8c71..7a6960e40ea2d8aa5a5fa469a6cadf4f5626e9ed 100644
--- a/core/modules/field_ui/src/FieldConfigListBuilder.php
+++ b/core/modules/field_ui/src/FieldConfigListBuilder.php
@@ -93,7 +93,7 @@ public function load() {
 
     // Sort the entities using the entity class's sort() method.
     // See \Drupal\Core\Config\Entity\ConfigEntityBase::sort().
-    uasort($entities, array($this->entityType->getClass(), 'sort'));
+    uasort($entities, [$this->entityType->getClass(), 'sort']);
     return $entities;
   }
 
@@ -101,14 +101,14 @@ public function load() {
    * {@inheritdoc}
    */
   public function buildHeader() {
-    $header = array(
+    $header = [
       'label' => $this->t('Label'),
-      'field_name' => array(
+      'field_name' => [
         'data' => $this->t('Machine name'),
-        'class' => array(RESPONSIVE_PRIORITY_MEDIUM),
-      ),
+        'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+      ],
       'field_type' => $this->t('Field type'),
-    );
+    ];
     return $header + parent::buildHeader();
   }
 
@@ -118,31 +118,31 @@ public function buildHeader() {
   public function buildRow(EntityInterface $field_config) {
     /** @var \Drupal\field\FieldConfigInterface $field_config */
     $field_storage = $field_config->getFieldStorageDefinition();
-    $route_parameters = array(
+    $route_parameters = [
       'field_config' => $field_config->id(),
-    ) + FieldUI::getRouteBundleParameter($this->entityManager->getDefinition($this->targetEntityTypeId), $this->targetBundle);
+    ] + FieldUI::getRouteBundleParameter($this->entityManager->getDefinition($this->targetEntityTypeId), $this->targetBundle);
 
-    $row = array(
+    $row = [
       'id' => Html::getClass($field_config->getName()),
-      'data' => array(
+      'data' => [
         'label' => $field_config->getLabel(),
         'field_name' => $field_config->getName(),
-        'field_type' => array(
-          'data' => array(
+        'field_type' => [
+          'data' => [
             '#type' => 'link',
             '#title' => $this->fieldTypeManager->getDefinitions()[$field_storage->getType()]['label'],
             '#url' => Url::fromRoute("entity.field_config.{$this->targetEntityTypeId}_storage_edit_form", $route_parameters),
-            '#options' => array('attributes' => array('title' => $this->t('Edit field settings.'))),
-          ),
-        ),
-      ),
-    );
+            '#options' => ['attributes' => ['title' => $this->t('Edit field settings.')]],
+          ],
+        ],
+      ],
+    ];
 
     // Add the operations.
     $row['data'] = $row['data'] + parent::buildRow($field_config);
 
     if ($field_storage->isLocked()) {
-      $row['data']['operations'] = array('data' => array('#markup' => $this->t('Locked')));
+      $row['data']['operations'] = ['data' => ['#markup' => $this->t('Locked')]];
       $row['class'][] = 'menu-disabled';
     }
 
@@ -157,26 +157,26 @@ public function getDefaultOperations(EntityInterface $entity) {
     $operations = parent::getDefaultOperations($entity);
 
     if ($entity->access('update') && $entity->hasLinkTemplate("{$entity->getTargetEntityTypeId()}-field-edit-form")) {
-      $operations['edit'] = array(
+      $operations['edit'] = [
         'title' => $this->t('Edit'),
         'weight' => 10,
         'url' => $entity->urlInfo("{$entity->getTargetEntityTypeId()}-field-edit-form"),
-      );
+      ];
     }
     if ($entity->access('delete') && $entity->hasLinkTemplate("{$entity->getTargetEntityTypeId()}-field-delete-form")) {
-      $operations['delete'] = array(
+      $operations['delete'] = [
         'title' => $this->t('Delete'),
         'weight' => 100,
         'url' => $entity->urlInfo("{$entity->getTargetEntityTypeId()}-field-delete-form"),
-      );
+      ];
     }
 
-    $operations['storage-settings'] = array(
+    $operations['storage-settings'] = [
       'title' => $this->t('Storage settings'),
       'weight' => 20,
-      'attributes' => array('title' => $this->t('Edit storage settings.')),
+      'attributes' => ['title' => $this->t('Edit storage settings.')],
       'url' => $entity->urlInfo("{$entity->getTargetEntityTypeId()}-storage-edit-form"),
-    );
+    ];
     $operations['edit']['attributes']['title'] = $this->t('Edit field settings.');
     $operations['delete']['attributes']['title'] = $this->t('Delete field.');
 
diff --git a/core/modules/field_ui/src/FieldStorageConfigListBuilder.php b/core/modules/field_ui/src/FieldStorageConfigListBuilder.php
index e39954c7b5b64b63dd99ae774395451da6be6441..f82bd9df1df147130fb9aabbb581c4cebfb1eb00 100644
--- a/core/modules/field_ui/src/FieldStorageConfigListBuilder.php
+++ b/core/modules/field_ui/src/FieldStorageConfigListBuilder.php
@@ -82,10 +82,10 @@ public static function createInstance(ContainerInterface $container, EntityTypeI
    */
   public function buildHeader() {
     $header['id'] = $this->t('Field name');
-    $header['type'] = array(
+    $header['type'] = [
       'data' => $this->t('Field type'),
-      'class' => array(RESPONSIVE_PRIORITY_MEDIUM),
-    );
+      'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+    ];
     $header['usage'] = $this->t('Used in');
     return $header;
   }
@@ -95,17 +95,17 @@ public function buildHeader() {
    */
   public function buildRow(EntityInterface $field_storage) {
     if ($field_storage->isLocked()) {
-      $row['class'] = array('menu-disabled');
-      $row['data']['id'] = $this->t('@field_name (Locked)', array('@field_name' => $field_storage->getName()));
+      $row['class'] = ['menu-disabled'];
+      $row['data']['id'] = $this->t('@field_name (Locked)', ['@field_name' => $field_storage->getName()]);
     }
     else {
       $row['data']['id'] = $field_storage->getName();
     }
 
     $field_type = $this->fieldTypes[$field_storage->getType()];
-    $row['data']['type'] = $this->t('@type (module: @module)', array('@type' => $field_type['label'], '@module' => $field_type['provider']));
+    $row['data']['type'] = $this->t('@type (module: @module)', ['@type' => $field_type['label'], '@module' => $field_type['provider']]);
 
-    $usage = array();
+    $usage = [];
     foreach ($field_storage->getBundles() as $bundle) {
       $entity_type_id = $field_storage->getTargetEntityTypeId();
       if ($route_info = FieldUI::getOverviewRouteInfo($entity_type_id, $bundle)) {
diff --git a/core/modules/field_ui/src/FieldUI.php b/core/modules/field_ui/src/FieldUI.php
index b3416947788ec3ba1ae96f2e86d56eafb9076829..b9351a4b77ffd3479fb1f5c43c0d414c6eeb7397 100644
--- a/core/modules/field_ui/src/FieldUI.php
+++ b/core/modules/field_ui/src/FieldUI.php
@@ -47,9 +47,9 @@ public static function getNextDestination(array $destinations) {
     $next_destination = array_shift($destinations);
     if (is_array($next_destination)) {
       $next_destination['options']['query']['destinations'] = $destinations;
-      $next_destination += array(
-        'route_parameters' => array(),
-      );
+      $next_destination += [
+        'route_parameters' => [],
+      ];
       $next_destination = Url::fromRoute($next_destination['route_name'], $next_destination['route_parameters'], $next_destination['options']);
     }
     else {
@@ -77,7 +77,7 @@ public static function getNextDestination(array $destinations) {
    */
   public static function getRouteBundleParameter(EntityTypeInterface $entity_type, $bundle) {
     $bundle_parameter_key = $entity_type->getBundleEntityType() ?: 'bundle';
-    return array($bundle_parameter_key => $bundle);
+    return [$bundle_parameter_key => $bundle];
   }
 
 }
diff --git a/core/modules/field_ui/src/Form/EntityDisplayFormBase.php b/core/modules/field_ui/src/Form/EntityDisplayFormBase.php
index 8908f659b6d062ee55cdc9153af77f22eb5c43fc..42a4e81d6225b84187cce83f809f9e5b335dabb5 100644
--- a/core/modules/field_ui/src/Form/EntityDisplayFormBase.php
+++ b/core/modules/field_ui/src/Form/EntityDisplayFormBase.php
@@ -90,17 +90,17 @@ public function getEntityFromRouteMatch(RouteMatchInterface $route_match, $entit
    *   @endcode
    */
   public function getRegions() {
-    return array(
-      'content' => array(
+    return [
+      'content' => [
         'title' => $this->t('Content'),
         'invisible' => TRUE,
         'message' => $this->t('No field is displayed.')
-      ),
-      'hidden' => array(
-        'title' => $this->t('Disabled', array(), array('context' => 'Plural')),
+      ],
+      'hidden' => [
+        'title' => $this->t('Disabled', [], ['context' => 'Plural']),
         'message' => $this->t('No field is hidden.')
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -110,7 +110,7 @@ public function getRegions() {
    *   An array containing the region options.
    */
   public function getRegionOptions() {
-    $options = array();
+    $options = [];
     foreach ($this->getRegions() as $region => $data) {
       $options[$region] = $data['title'];
     }
@@ -139,48 +139,48 @@ public function form(array $form, FormStateInterface $form_state) {
     $field_definitions = $this->getFieldDefinitions();
     $extra_fields = $this->getExtraFields();
 
-    $form += array(
+    $form += [
       '#entity_type' => $this->entity->getTargetEntityTypeId(),
       '#bundle' => $this->entity->getTargetBundle(),
       '#fields' => array_keys($field_definitions),
       '#extra' => array_keys($extra_fields),
-    );
+    ];
 
     if (empty($field_definitions) && empty($extra_fields) && $route_info = FieldUI::getOverviewRouteInfo($this->entity->getTargetEntityTypeId(), $this->entity->getTargetBundle())) {
-      drupal_set_message($this->t('There are no fields yet added. You can add new fields on the <a href=":link">Manage fields</a> page.', array(':link' => $route_info->toString())), 'warning');
+      drupal_set_message($this->t('There are no fields yet added. You can add new fields on the <a href=":link">Manage fields</a> page.', [':link' => $route_info->toString()]), 'warning');
       return $form;
     }
 
-    $table = array(
+    $table = [
       '#type' => 'field_ui_table',
       '#header' => $this->getTableHeader(),
       '#regions' => $this->getRegions(),
-      '#attributes' => array(
-        'class' => array('field-ui-overview'),
+      '#attributes' => [
+        'class' => ['field-ui-overview'],
         'id' => 'field-display-overview',
-      ),
-      '#tabledrag' => array(
-        array(
+      ],
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'field-weight',
-        ),
-        array(
+        ],
+        [
           'action' => 'match',
           'relationship' => 'parent',
           'group' => 'field-parent',
           'subgroup' => 'field-parent',
           'source' => 'field-name',
-        ),
-        array(
+        ],
+        [
           'action' => 'match',
           'relationship' => 'parent',
           'group' => 'field-region',
           'subgroup' => 'field-region',
           'source' => 'field-name',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     // Field rows.
     foreach ($field_definitions as $field_name => $field_definition) {
@@ -201,21 +201,21 @@ public function form(array $form, FormStateInterface $form_state) {
       // Unset default option.
       unset($display_mode_options['default']);
       if ($display_mode_options) {
-        $form['modes'] = array(
+        $form['modes'] = [
           '#type' => 'details',
           '#title' => $this->t('Custom display settings'),
-        );
+        ];
         // Prepare default values for the 'Custom display settings' checkboxes.
-        $default = array();
+        $default = [];
         if ($enabled_displays = array_filter($this->getDisplayStatuses())) {
           $default = array_keys(array_intersect_key($display_mode_options, $enabled_displays));
         }
-        $form['modes']['display_modes_custom'] = array(
+        $form['modes']['display_modes_custom'] = [
           '#type' => 'checkboxes',
           '#title' => $this->t('Use custom display settings for the following @display_context modes', ['@display_context' => $this->displayContext]),
           '#options' => $display_mode_options,
           '#default_value' => $default,
-        );
+        ];
         // Provide link to manage display modes.
         $form['modes']['display_modes_link'] = $this->getDisplayModesLink();
       }
@@ -227,29 +227,29 @@ public function form(array $form, FormStateInterface $form_state) {
     // the selects, but triggered by the client-side script through a hidden
     // #ajax 'Refresh' button. A hidden 'refresh_rows' input tracks the name of
     // affected rows.
-    $form['refresh_rows'] = array('#type' => 'hidden');
-    $form['refresh'] = array(
+    $form['refresh_rows'] = ['#type' => 'hidden'];
+    $form['refresh'] = [
       '#type' => 'submit',
       '#value' => $this->t('Refresh'),
       '#op' => 'refresh_table',
-      '#submit' => array('::multistepSubmit'),
-      '#ajax' => array(
+      '#submit' => ['::multistepSubmit'],
+      '#ajax' => [
         'callback' => '::multistepAjax',
         'wrapper' => 'field-display-overview-wrapper',
         'effect' => 'fade',
         // The button stays hidden, so we hide the Ajax spinner too. Ad-hoc
         // spinners will be added manually by the client-side script.
         'progress' => 'none',
-      ),
-      '#attributes' => array('class' => array('visually-hidden'))
-    );
+      ],
+      '#attributes' => ['class' => ['visually-hidden']]
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#button_type' => 'primary',
       '#value' => $this->t('Save'),
-    );
+    ];
 
     $form['#attached']['library'][] = 'field_ui/drupal.field_ui';
 
@@ -281,82 +281,82 @@ protected function buildFieldRow(FieldDefinitionInterface $field_definition, arr
     }
 
     $regions = array_keys($this->getRegions());
-    $field_row = array(
-      '#attributes' => array('class' => array('draggable', 'tabledrag-leaf')),
+    $field_row = [
+      '#attributes' => ['class' => ['draggable', 'tabledrag-leaf']],
       '#row_type' => 'field',
-      '#region_callback' => array($this, 'getRowRegion'),
-      '#js_settings' => array(
+      '#region_callback' => [$this, 'getRowRegion'],
+      '#js_settings' => [
         'rowHandler' => 'field',
         'defaultPlugin' => $this->getDefaultPlugin($field_definition->getType()),
-      ),
-      'human_name' => array(
+      ],
+      'human_name' => [
         '#plain_text' => $label,
-      ),
-      'weight' => array(
+      ],
+      'weight' => [
         '#type' => 'textfield',
-        '#title' => $this->t('Weight for @title', array('@title' => $label)),
+        '#title' => $this->t('Weight for @title', ['@title' => $label]),
         '#title_display' => 'invisible',
         '#default_value' => $display_options ? $display_options['weight'] : '0',
         '#size' => 3,
-        '#attributes' => array('class' => array('field-weight')),
-      ),
-      'parent_wrapper' => array(
-        'parent' => array(
+        '#attributes' => ['class' => ['field-weight']],
+      ],
+      'parent_wrapper' => [
+        'parent' => [
           '#type' => 'select',
-          '#title' => $this->t('Label display for @title', array('@title' => $label)),
+          '#title' => $this->t('Label display for @title', ['@title' => $label]),
           '#title_display' => 'invisible',
           '#options' => array_combine($regions, $regions),
           '#empty_value' => '',
-          '#attributes' => array('class' => array('js-field-parent', 'field-parent')),
-          '#parents' => array('fields', $field_name, 'parent'),
-        ),
-        'hidden_name' => array(
+          '#attributes' => ['class' => ['js-field-parent', 'field-parent']],
+          '#parents' => ['fields', $field_name, 'parent'],
+        ],
+        'hidden_name' => [
           '#type' => 'hidden',
           '#default_value' => $field_name,
-          '#attributes' => array('class' => array('field-name')),
-        ),
-      ),
-      'region' => array(
+          '#attributes' => ['class' => ['field-name']],
+        ],
+      ],
+      'region' => [
         '#type' => 'select',
-        '#title' => $this->t('Region for @title', array('@title' => $label)),
+        '#title' => $this->t('Region for @title', ['@title' => $label]),
         '#title_display' => 'invisible',
         '#options' => $this->getRegionOptions(),
         '#default_value' => $display_options ? $display_options['region'] : 'hidden',
-        '#attributes' => array('class' => array('field-region')),
-      ),
-    );
+        '#attributes' => ['class' => ['field-region']],
+      ],
+    ];
 
-    $field_row['plugin'] = array(
-      'type' => array(
+    $field_row['plugin'] = [
+      'type' => [
         '#type' => 'select',
-        '#title' => $this->t('Plugin for @title', array('@title' => $label)),
+        '#title' => $this->t('Plugin for @title', ['@title' => $label]),
         '#title_display' => 'invisible',
         '#options' => $this->getApplicablePluginOptions($field_definition),
         '#default_value' => $display_options ? $display_options['type'] : 'hidden',
-        '#parents' => array('fields', $field_name, 'type'),
-        '#attributes' => array('class' => array('field-plugin-type')),
-      ),
-      'settings_edit_form' => array(),
-    );
+        '#parents' => ['fields', $field_name, 'type'],
+        '#attributes' => ['class' => ['field-plugin-type']],
+      ],
+      'settings_edit_form' => [],
+    ];
 
     // Get the corresponding plugin object.
     $plugin = $this->entity->getRenderer($field_name);
 
     // Base button element for the various plugin settings actions.
-    $base_button = array(
-      '#submit' => array('::multistepSubmit'),
-      '#ajax' => array(
+    $base_button = [
+      '#submit' => ['::multistepSubmit'],
+      '#ajax' => [
         'callback' => '::multistepAjax',
         'wrapper' => 'field-display-overview-wrapper',
         'effect' => 'fade',
-      ),
+      ],
       '#field_name' => $field_name,
-    );
+    ];
 
     if ($form_state->get('plugin_settings_edit') == $field_name) {
       // We are currently editing this field's plugin settings. Display the
       // settings form and submit buttons.
-      $field_row['plugin']['settings_edit_form'] = array();
+      $field_row['plugin']['settings_edit_form'] = [];
 
       if ($plugin) {
         // Generate the settings form and allow other modules to alter it.
@@ -364,43 +364,43 @@ protected function buildFieldRow(FieldDefinitionInterface $field_definition, arr
         $third_party_settings_form = $this->thirdPartySettingsForm($plugin, $field_definition, $form, $form_state);
 
         if ($settings_form || $third_party_settings_form) {
-          $field_row['plugin']['#cell_attributes'] = array('colspan' => 3);
-          $field_row['plugin']['settings_edit_form'] = array(
+          $field_row['plugin']['#cell_attributes'] = ['colspan' => 3];
+          $field_row['plugin']['settings_edit_form'] = [
             '#type' => 'container',
-            '#attributes' => array('class' => array('field-plugin-settings-edit-form')),
-            '#parents' => array('fields', $field_name, 'settings_edit_form'),
-            'label' => array(
+            '#attributes' => ['class' => ['field-plugin-settings-edit-form']],
+            '#parents' => ['fields', $field_name, 'settings_edit_form'],
+            'label' => [
               '#markup' => $this->t('Plugin settings'),
-            ),
+            ],
             'settings' => $settings_form,
             'third_party_settings' => $third_party_settings_form,
-            'actions' => array(
+            'actions' => [
               '#type' => 'actions',
-              'save_settings' => $base_button + array(
+              'save_settings' => $base_button + [
                 '#type' => 'submit',
                 '#button_type' => 'primary',
                 '#name' => $field_name . '_plugin_settings_update',
                 '#value' => $this->t('Update'),
                 '#op' => 'update',
-              ),
-              'cancel_settings' => $base_button + array(
+              ],
+              'cancel_settings' => $base_button + [
                 '#type' => 'submit',
                 '#name' => $field_name . '_plugin_settings_cancel',
                 '#value' => $this->t('Cancel'),
                 '#op' => 'cancel',
                 // Do not check errors for the 'Cancel' button, but make sure we
                 // get the value of the 'plugin type' select.
-                '#limit_validation_errors' => array(array('fields', $field_name, 'type')),
-              ),
-            ),
-          );
+                '#limit_validation_errors' => [['fields', $field_name, 'type']],
+              ],
+            ],
+          ];
           $field_row['#attributes']['class'][] = 'field-plugin-settings-editing';
         }
       }
     }
     else {
-      $field_row['settings_summary'] = array();
-      $field_row['settings_edit'] = array();
+      $field_row['settings_summary'] = [];
+      $field_row['settings_edit'] = [];
 
       if ($plugin) {
         // Display a summary of the current plugin settings, and (if the
@@ -411,30 +411,30 @@ protected function buildFieldRow(FieldDefinitionInterface $field_definition, arr
         $this->alterSettingsSummary($summary, $plugin, $field_definition);
 
         if (!empty($summary)) {
-          $field_row['settings_summary'] = array(
+          $field_row['settings_summary'] = [
             '#type' => 'inline_template',
             '#template' => '<div class="field-plugin-summary">{{ summary|safe_join("<br />") }}</div>',
-            '#context' => array('summary' => $summary),
-            '#cell_attributes' => array('class' => array('field-plugin-summary-cell')),
-          );
+            '#context' => ['summary' => $summary],
+            '#cell_attributes' => ['class' => ['field-plugin-summary-cell']],
+          ];
         }
 
         // Check selected plugin settings to display edit link or not.
         $settings_form = $plugin->settingsForm($form, $form_state);
         $third_party_settings_form = $this->thirdPartySettingsForm($plugin, $field_definition, $form, $form_state);
         if (!empty($settings_form) || !empty($third_party_settings_form)) {
-          $field_row['settings_edit'] = $base_button + array(
+          $field_row['settings_edit'] = $base_button + [
             '#type' => 'image_button',
             '#name' => $field_name . '_settings_edit',
             '#src' => 'core/misc/icons/787878/cog.svg',
-            '#attributes' => array('class' => array('field-plugin-settings-edit'), 'alt' => $this->t('Edit')),
+            '#attributes' => ['class' => ['field-plugin-settings-edit'], 'alt' => $this->t('Edit')],
             '#op' => 'edit',
             // Do not check errors for the 'Edit' button, but make sure we get
             // the value of the 'plugin type' select.
-            '#limit_validation_errors' => array(array('fields', $field_name, 'type')),
+            '#limit_validation_errors' => [['fields', $field_name, 'type']],
             '#prefix' => '<div class="field-plugin-settings-edit-wrapper">',
             '#suffix' => '</div>',
-          );
+          ];
         }
       }
     }
@@ -457,50 +457,50 @@ protected function buildExtraFieldRow($field_id, $extra_field) {
     $display_options = $this->entity->getComponent($field_id);
 
     $regions = array_keys($this->getRegions());
-    $extra_field_row = array(
-      '#attributes' => array('class' => array('draggable', 'tabledrag-leaf')),
+    $extra_field_row = [
+      '#attributes' => ['class' => ['draggable', 'tabledrag-leaf']],
       '#row_type' => 'extra_field',
-      '#region_callback' => array($this, 'getRowRegion'),
-      '#js_settings' => array('rowHandler' => 'field'),
-      'human_name' => array(
+      '#region_callback' => [$this, 'getRowRegion'],
+      '#js_settings' => ['rowHandler' => 'field'],
+      'human_name' => [
         '#markup' => $extra_field['label'],
-      ),
-      'weight' => array(
+      ],
+      'weight' => [
         '#type' => 'textfield',
-        '#title' => $this->t('Weight for @title', array('@title' => $extra_field['label'])),
+        '#title' => $this->t('Weight for @title', ['@title' => $extra_field['label']]),
         '#title_display' => 'invisible',
         '#default_value' => $display_options ? $display_options['weight'] : 0,
         '#size' => 3,
-        '#attributes' => array('class' => array('field-weight')),
-      ),
-      'parent_wrapper' => array(
-        'parent' => array(
+        '#attributes' => ['class' => ['field-weight']],
+      ],
+      'parent_wrapper' => [
+        'parent' => [
           '#type' => 'select',
-          '#title' => $this->t('Parents for @title', array('@title' => $extra_field['label'])),
+          '#title' => $this->t('Parents for @title', ['@title' => $extra_field['label']]),
           '#title_display' => 'invisible',
           '#options' => array_combine($regions, $regions),
           '#empty_value' => '',
-          '#attributes' => array('class' => array('js-field-parent', 'field-parent')),
-          '#parents' => array('fields', $field_id, 'parent'),
-        ),
-        'hidden_name' => array(
+          '#attributes' => ['class' => ['js-field-parent', 'field-parent']],
+          '#parents' => ['fields', $field_id, 'parent'],
+        ],
+        'hidden_name' => [
           '#type' => 'hidden',
           '#default_value' => $field_id,
-          '#attributes' => array('class' => array('field-name')),
-        ),
-      ),
-      'region' => array(
+          '#attributes' => ['class' => ['field-name']],
+        ],
+      ],
+      'region' => [
         '#type' => 'select',
-        '#title' => $this->t('Region for @title', array('@title' => $extra_field['label'])),
+        '#title' => $this->t('Region for @title', ['@title' => $extra_field['label']]),
         '#title_display' => 'invisible',
         '#options' => $this->getRegionOptions(),
         '#default_value' => $display_options ? $display_options['region'] : 'hidden',
-        '#attributes' => array('class' => array('field-region')),
-      ),
-      'plugin' => array(),
-      'settings_summary' => array(),
-      'settings_edit' => array(),
-    );
+        '#attributes' => ['class' => ['field-region']],
+      ],
+      'plugin' => [],
+      'settings_summary' => [],
+      'settings_edit' => [],
+    ];
 
     return $extra_field_row;
   }
@@ -524,7 +524,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $display_modes = $this->getDisplayModes();
       $current_statuses = $this->getDisplayStatuses();
 
-      $statuses = array();
+      $statuses = [];
       foreach ($form_values['display_modes_custom'] as $mode => $value) {
         if (!empty($value) && empty($current_statuses[$mode])) {
           // If no display exists for the newly enabled view mode, initialize
@@ -595,10 +595,10 @@ protected function copyFormValuesToEntity(EntityInterface $entity, array $form,
         $entity->removeComponent($name);
       }
       else {
-        $entity->setComponent($name, array(
+        $entity->setComponent($name, [
           'weight' => $form_values['fields'][$name]['weight'],
           'region' => $form_values['fields'][$name]['region'],
-        ));
+        ]);
       }
     }
   }
@@ -655,19 +655,19 @@ public function multistepAjax($form, FormStateInterface $form_state) {
     // Pick the elements that need to receive the ajax-new-content effect.
     switch ($op) {
       case 'edit':
-        $updated_rows = array($trigger['#field_name']);
-        $updated_columns = array('plugin');
+        $updated_rows = [$trigger['#field_name']];
+        $updated_columns = ['plugin'];
         break;
 
       case 'update':
       case 'cancel':
-        $updated_rows = array($trigger['#field_name']);
-        $updated_columns = array('plugin', 'settings_summary', 'settings_edit');
+        $updated_rows = [$trigger['#field_name']];
+        $updated_columns = ['plugin', 'settings_summary', 'settings_edit'];
         break;
 
       case 'refresh_table':
         $updated_rows = array_values(explode(' ', $form_state->getValue('refresh_rows')));
-        $updated_columns = array('settings_summary', 'settings_edit');
+        $updated_columns = ['settings_summary', 'settings_edit'];
         break;
     }
 
@@ -727,7 +727,7 @@ public function reduceOrder($array, $a) {
   protected function getExtraFields() {
     $context = $this->displayContext == 'view' ? 'display' : $this->displayContext;
     $extra_fields = $this->entityManager->getExtraFields($this->entity->getTargetEntityTypeId(), $this->entity->getTargetBundle());
-    return isset($extra_fields[$context]) ? $extra_fields[$context] : array();
+    return isset($extra_fields[$context]) ? $extra_fields[$context] : [];
   }
 
   /**
@@ -756,7 +756,7 @@ abstract protected function getEntityDisplay($entity_type_id, $bundle, $mode);
    */
   protected function getApplicablePluginOptions(FieldDefinitionInterface $field_definition) {
     $options = $this->pluginManager->getOptions($field_definition->getType());
-    $applicable_options = array();
+    $applicable_options = [];
     foreach ($options as $option => $label) {
       $plugin_class = DefaultFactory::getPluginClass($option, $this->pluginManager->getDefinition($option));
       if ($plugin_class::isApplicable($field_definition)) {
@@ -825,7 +825,7 @@ public function getRowRegion($row) {
    *   An array holding entity displays or entity form displays.
    */
   protected function getDisplays() {
-    $load_ids = array();
+    $load_ids = [];
     $display_entity_type = $this->entity->getEntityTypeId();
     $entity_type = $this->entityManager->getDefinition($display_entity_type);
     $config_prefix = $entity_type->getConfigPrefix();
@@ -847,7 +847,7 @@ protected function getDisplays() {
    *   An array of form or view mode statuses.
    */
   protected function getDisplayStatuses() {
-    $display_statuses = array();
+    $display_statuses = [];
     $displays = $this->getDisplays();
     foreach ($displays as $display) {
       $display_statuses[$display->get('mode')] = $display->status();
diff --git a/core/modules/field_ui/src/Form/EntityDisplayModeAddForm.php b/core/modules/field_ui/src/Form/EntityDisplayModeAddForm.php
index 141af84fffae9e15d123b7c5a08c4c5d9b1c46ad..ed1c5fe1e552e1743986ccca8b4e114008b54bd8 100644
--- a/core/modules/field_ui/src/Form/EntityDisplayModeAddForm.php
+++ b/core/modules/field_ui/src/Form/EntityDisplayModeAddForm.php
@@ -26,7 +26,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $entity_t
     // Change replace_pattern to avoid undesired dots.
     $form['id']['#machine_name']['replace_pattern'] = '[^a-z0-9_]+';
     $definition = $this->entityManager->getDefinition($this->targetEntityTypeId);
-    $form['#title'] = $this->t('Add new %label @entity-type', array('%label' => $definition->getLabel(), '@entity-type' => $this->entityType->getLowercaseLabel()));
+    $form['#title'] = $this->t('Add new %label @entity-type', ['%label' => $definition->getLabel(), '@entity-type' => $this->entityType->getLowercaseLabel()]);
     return $form;
   }
 
diff --git a/core/modules/field_ui/src/Form/EntityDisplayModeDeleteForm.php b/core/modules/field_ui/src/Form/EntityDisplayModeDeleteForm.php
index fa22a379dc1a7458018ce230b596d088d01f7b15..f7d88046114840876def3617a55263445e7a61fc 100644
--- a/core/modules/field_ui/src/Form/EntityDisplayModeDeleteForm.php
+++ b/core/modules/field_ui/src/Form/EntityDisplayModeDeleteForm.php
@@ -14,7 +14,7 @@ class EntityDisplayModeDeleteForm extends EntityDeleteForm {
    */
   public function getDescription() {
     $entity_type = $this->entity->getEntityType();
-    return $this->t('Deleting a @entity-type will cause any output still requesting to use that @entity-type to use the default display settings.', array('@entity-type' => $entity_type->getLowercaseLabel()));
+    return $this->t('Deleting a @entity-type will cause any output still requesting to use that @entity-type to use the default display settings.', ['@entity-type' => $entity_type->getLowercaseLabel()]);
   }
 
 }
diff --git a/core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php b/core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php
index 7a566418085543185ebcac85e9c4e1eb1a998e91..72a8a19643a0368fa3aea6b5eb9af160529a61f0 100644
--- a/core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php
+++ b/core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php
@@ -29,24 +29,24 @@ protected function init(FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function form(array $form, FormStateInterface $form_state) {
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Name'),
       '#maxlength' => 100,
       '#default_value' => $this->entity->label(),
-    );
+    ];
 
-    $form['id'] = array(
+    $form['id'] = [
       '#type' => 'machine_name',
       '#description' => $this->t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
       '#disabled' => !$this->entity->isNew(),
       '#default_value' => $this->entity->id(),
       '#field_prefix' => $this->entity->isNew() ? $this->entity->getTargetType() . '.' : '',
-      '#machine_name' => array(
-        'exists' => array($this, 'exists'),
+      '#machine_name' => [
+        'exists' => [$this, 'exists'],
         'replace_pattern' => '[^a-z0-9_.]+',
-      ),
-    );
+      ],
+    ];
 
     return $form;
   }
@@ -78,7 +78,7 @@ public function exists($entity_id, array $element) {
    * {@inheritdoc}
    */
   public function save(array $form, FormStateInterface $form_state) {
-    drupal_set_message($this->t('Saved the %label @entity-type.', array('%label' => $this->entity->label(), '@entity-type' => $this->entityType->getLowercaseLabel())));
+    drupal_set_message($this->t('Saved the %label @entity-type.', ['%label' => $this->entity->label(), '@entity-type' => $this->entityType->getLowercaseLabel()]));
     $this->entity->save();
     \Drupal::entityManager()->clearCachedFieldDefinitions();
     $form_state->setRedirectUrl($this->entity->urlInfo('collection'));
diff --git a/core/modules/field_ui/src/Form/EntityFormDisplayEditForm.php b/core/modules/field_ui/src/Form/EntityFormDisplayEditForm.php
index af8e2edfc3073d052cf9cb5789f823d09c9ed1e6..2c3e3604605542a03316d23aa0ed2817ac6057da 100644
--- a/core/modules/field_ui/src/Form/EntityFormDisplayEditForm.php
+++ b/core/modules/field_ui/src/Form/EntityFormDisplayEditForm.php
@@ -38,7 +38,7 @@ protected function buildFieldRow(FieldDefinitionInterface $field_definition, arr
     $field_name = $field_definition->getName();
 
     // Update the (invisible) title of the 'plugin' column.
-    $field_row['plugin']['#title'] = $this->t('Formatter for @title', array('@title' => $field_definition->getLabel()));
+    $field_row['plugin']['#title'] = $this->t('Formatter for @title', ['@title' => $field_definition->getLabel()]);
     if (!empty($field_row['plugin']['settings_edit_form']) && ($plugin = $this->entity->getRenderer($field_name))) {
       $plugin_type_info = $plugin->getPluginDefinition();
       $field_row['plugin']['settings_edit_form']['label']['#markup'] = $this->t('Widget settings:') . ' <span class="plugin-name">' . $plugin_type_info['label'] . '</span>';
@@ -90,13 +90,13 @@ protected function getDisplayModesLink() {
    * {@inheritdoc}
    */
   protected function getTableHeader() {
-    return array(
+    return [
       $this->t('Field'),
       $this->t('Weight'),
       $this->t('Parent'),
       $this->t('Region'),
-      array('data' => $this->t('Widget'), 'colspan' => 3),
-    );
+      ['data' => $this->t('Widget'), 'colspan' => 3],
+    ];
   }
 
   /**
@@ -113,17 +113,17 @@ protected function getOverviewUrl($mode) {
    * {@inheritdoc}
    */
   protected function thirdPartySettingsForm(PluginSettingsInterface $plugin, FieldDefinitionInterface $field_definition, array $form, FormStateInterface $form_state) {
-    $settings_form = array();
+    $settings_form = [];
     // Invoke hook_field_widget_third_party_settings_form(), keying resulting
     // subforms by module name.
     foreach ($this->moduleHandler->getImplementations('field_widget_third_party_settings_form') as $module) {
-      $settings_form[$module] = $this->moduleHandler->invoke($module, 'field_widget_third_party_settings_form', array(
+      $settings_form[$module] = $this->moduleHandler->invoke($module, 'field_widget_third_party_settings_form', [
         $plugin,
         $field_definition,
         $this->entity->getMode(),
         $form,
         $form_state,
-      ));
+      ]);
     }
     return $settings_form;
   }
@@ -132,11 +132,11 @@ protected function thirdPartySettingsForm(PluginSettingsInterface $plugin, Field
    * {@inheritdoc}
    */
   protected function alterSettingsSummary(array &$summary, PluginSettingsInterface $plugin, FieldDefinitionInterface $field_definition) {
-    $context = array(
+    $context = [
       'widget' => $plugin,
       'field_definition' => $field_definition,
       'form_mode' => $this->entity->getMode(),
-    );
+    ];
     $this->moduleHandler->alter('field_widget_settings_summary', $summary, $context);
   }
 
diff --git a/core/modules/field_ui/src/Form/EntityViewDisplayEditForm.php b/core/modules/field_ui/src/Form/EntityViewDisplayEditForm.php
index 174726f2c60b5e4eb2a431bf475f394f96de51ec..c27f3d4f524e31f450ec883e8feb68c494110ae8 100644
--- a/core/modules/field_ui/src/Form/EntityViewDisplayEditForm.php
+++ b/core/modules/field_ui/src/Form/EntityViewDisplayEditForm.php
@@ -39,21 +39,21 @@ protected function buildFieldRow(FieldDefinitionInterface $field_definition, arr
     $display_options = $this->entity->getComponent($field_name);
 
     // Insert the label column.
-    $label = array(
-      'label' => array(
+    $label = [
+      'label' => [
         '#type' => 'select',
-        '#title' => $this->t('Label display for @title', array('@title' => $field_definition->getLabel())),
+        '#title' => $this->t('Label display for @title', ['@title' => $field_definition->getLabel()]),
         '#title_display' => 'invisible',
         '#options' => $this->getFieldLabelOptions(),
         '#default_value' => $display_options ? $display_options['label'] : 'above',
-      ),
-    );
+      ],
+    ];
 
     $label_position = array_search('plugin', array_keys($field_row));
     $field_row = array_slice($field_row, 0, $label_position, TRUE) + $label + array_slice($field_row, $label_position, count($field_row) - 1, TRUE);
 
     // Update the (invisible) title of the 'plugin' column.
-    $field_row['plugin']['#title'] = $this->t('Formatter for @title', array('@title' => $field_definition->getLabel()));
+    $field_row['plugin']['#title'] = $this->t('Formatter for @title', ['@title' => $field_definition->getLabel()]);
     if (!empty($field_row['plugin']['settings_edit_form']) && ($plugin = $this->entity->getRenderer($field_name))) {
       $plugin_type_info = $plugin->getPluginDefinition();
       $field_row['plugin']['settings_edit_form']['label']['#markup'] = $this->t('Format settings:') . ' <span class="plugin-name">' . $plugin_type_info['label'] . '</span>';
@@ -69,11 +69,11 @@ protected function buildExtraFieldRow($field_id, $extra_field) {
     $extra_field_row = parent::buildExtraFieldRow($field_id, $extra_field);
 
     // Insert an empty placeholder for the label column.
-    $label = array(
-      'empty_cell' => array(
+    $label = [
+      'empty_cell' => [
         '#markup' => '&nbsp;'
-      )
-    );
+      ]
+    ];
     $label_position = array_search('plugin', array_keys($extra_field_row));
     $extra_field_row = array_slice($extra_field_row, 0, $label_position, TRUE) + $label + array_slice($extra_field_row, $label_position, count($extra_field_row) - 1, TRUE);
 
@@ -123,14 +123,14 @@ protected function getDisplayModesLink() {;
    * {@inheritdoc}
    */
   protected function getTableHeader() {
-    return array(
+    return [
       $this->t('Field'),
       $this->t('Weight'),
       $this->t('Parent'),
       $this->t('Region'),
       $this->t('Label'),
-      array('data' => $this->t('Format'), 'colspan' => 3),
-    );
+      ['data' => $this->t('Format'), 'colspan' => 3],
+    ];
   }
 
   /**
@@ -150,29 +150,29 @@ protected function getOverviewUrl($mode) {
    *   An array of visibility options.
    */
   protected function getFieldLabelOptions() {
-    return array(
+    return [
       'above' => $this->t('Above'),
       'inline' => $this->t('Inline'),
       'hidden' => '- ' . $this->t('Hidden') . ' -',
       'visually_hidden' => '- ' . $this->t('Visually Hidden') . ' -',
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   protected function thirdPartySettingsForm(PluginSettingsInterface $plugin, FieldDefinitionInterface $field_definition, array $form, FormStateInterface $form_state) {
-    $settings_form = array();
+    $settings_form = [];
     // Invoke hook_field_formatter_third_party_settings_form(), keying resulting
     // subforms by module name.
     foreach ($this->moduleHandler->getImplementations('field_formatter_third_party_settings_form') as $module) {
-      $settings_form[$module] = $this->moduleHandler->invoke($module, 'field_formatter_third_party_settings_form', array(
+      $settings_form[$module] = $this->moduleHandler->invoke($module, 'field_formatter_third_party_settings_form', [
         $plugin,
         $field_definition,
         $this->entity->getMode(),
         $form,
         $form_state,
-      ));
+      ]);
     }
     return $settings_form;
   }
@@ -181,11 +181,11 @@ protected function thirdPartySettingsForm(PluginSettingsInterface $plugin, Field
    * {@inheritdoc}
    */
   protected function alterSettingsSummary(array &$summary, PluginSettingsInterface $plugin, FieldDefinitionInterface $field_definition) {
-    $context = array(
+    $context = [
       'formatter' => $plugin,
       'field_definition' => $field_definition,
       'view_mode' => $this->entity->getMode(),
-    );
+    ];
     $this->moduleHandler->alter('field_formatter_settings_summary', $summary, $context);
   }
 
diff --git a/core/modules/field_ui/src/Form/FieldConfigDeleteForm.php b/core/modules/field_ui/src/Form/FieldConfigDeleteForm.php
index f9c775561d44d019a38424a592ba473633beb2ef..67782311bc44ec5cd2cef4fc5a4fae048a6c6c1e 100644
--- a/core/modules/field_ui/src/Form/FieldConfigDeleteForm.php
+++ b/core/modules/field_ui/src/Form/FieldConfigDeleteForm.php
@@ -96,10 +96,10 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
     if ($field_storage && !$field_storage->isLocked()) {
       $this->entity->delete();
-      drupal_set_message($this->t('The field %field has been deleted from the %type content type.', array('%field' => $this->entity->label(), '%type' => $bundle_label)));
+      drupal_set_message($this->t('The field %field has been deleted from the %type content type.', ['%field' => $this->entity->label(), '%type' => $bundle_label]));
     }
     else {
-      drupal_set_message($this->t('There was a problem removing the %field from the %type content type.', array('%field' => $this->entity->label(), '%type' => $bundle_label)), 'error');
+      drupal_set_message($this->t('There was a problem removing the %field from the %type content type.', ['%field' => $this->entity->label(), '%type' => $bundle_label]), 'error');
     }
 
     $form_state->setRedirectUrl($this->getCancelUrl());
diff --git a/core/modules/field_ui/src/Form/FieldConfigEditForm.php b/core/modules/field_ui/src/Form/FieldConfigEditForm.php
index ff6d157117edf07c64a7a75149dc5f4f0b741325..2895479b3667c4a36c5b3067863411b1189911af 100644
--- a/core/modules/field_ui/src/Form/FieldConfigEditForm.php
+++ b/core/modules/field_ui/src/Form/FieldConfigEditForm.php
@@ -33,75 +33,75 @@ public function form(array $form, FormStateInterface $form_state) {
     $field_storage = $this->entity->getFieldStorageDefinition();
     $bundles = $this->entityManager->getBundleInfo($this->entity->getTargetEntityTypeId());
 
-    $form_title = $this->t('%field settings for %bundle', array(
+    $form_title = $this->t('%field settings for %bundle', [
       '%field' => $this->entity->getLabel(),
       '%bundle' => $bundles[$this->entity->getTargetBundle()]['label'],
-    ));
+    ]);
     $form['#title'] = $form_title;
 
     if ($field_storage->isLocked()) {
-      $form['locked'] = array(
-        '#markup' => $this->t('The field %field is locked and cannot be edited.', array('%field' => $this->entity->getLabel())),
-      );
+      $form['locked'] = [
+        '#markup' => $this->t('The field %field is locked and cannot be edited.', ['%field' => $this->entity->getLabel()]),
+      ];
       return $form;
     }
 
     // Build the configurable field values.
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label'),
       '#default_value' => $this->entity->getLabel() ?: $field_storage->getName(),
       '#required' => TRUE,
       '#weight' => -20,
-    );
+    ];
 
-    $form['description'] = array(
+    $form['description'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Help text'),
       '#default_value' => $this->entity->getDescription(),
       '#rows' => 5,
-      '#description' => $this->t('Instructions to present to the user below this field on the editing form.<br />Allowed HTML tags: @tags', array('@tags' => FieldFilteredMarkup::displayAllowedTags())) . '<br />' . $this->t('This field supports tokens.'),
+      '#description' => $this->t('Instructions to present to the user below this field on the editing form.<br />Allowed HTML tags: @tags', ['@tags' => FieldFilteredMarkup::displayAllowedTags()]) . '<br />' . $this->t('This field supports tokens.'),
       '#weight' => -10,
-    );
+    ];
 
-    $form['required'] = array(
+    $form['required'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Required field'),
       '#default_value' => $this->entity->isRequired(),
       '#weight' => -5,
-    );
+    ];
 
     // Create an arbitrary entity object (used by the 'default value' widget).
-    $ids = (object) array(
+    $ids = (object) [
       'entity_type' => $this->entity->getTargetEntityTypeId(),
       'bundle' => $this->entity->getTargetBundle(),
       'entity_id' => NULL
-    );
+    ];
     $form['#entity'] = _field_create_entity_from_ids($ids);
     $items = $form['#entity']->get($this->entity->getName());
     $item = $items->first() ?: $items->appendItem();
 
     // Add field settings for the field type and a container for third party
     // settings that modules can add to via hook_form_FORM_ID_alter().
-    $form['settings'] = array(
+    $form['settings'] = [
       '#tree' => TRUE,
       '#weight' => 10,
-    );
+    ];
     $form['settings'] += $item->fieldSettingsForm($form, $form_state);
-    $form['third_party_settings'] = array(
+    $form['third_party_settings'] = [
       '#tree' => TRUE,
       '#weight' => 11,
-    );
+    ];
 
     // Add handling for default value.
     if ($element = $items->defaultValuesForm($form, $form_state)) {
-      $element = array_merge($element, array(
+      $element = array_merge($element, [
         '#type' => 'details',
         '#title' => $this->t('Default value'),
         '#open' => TRUE,
         '#tree' => TRUE,
         '#description' => $this->t('The default value for this field, used when creating new content.'),
-      ));
+      ]);
 
       $form['default_value'] = $element;
     }
@@ -128,15 +128,15 @@ protected function actions(array $form, FormStateInterface $form_state) {
         $query['destination'] = $this->getRequest()->query->get('destination');
         $url->setOption('query', $query);
       }
-      $actions['delete'] = array(
+      $actions['delete'] = [
         '#type' => 'link',
         '#title' => $this->t('Delete'),
         '#url' => $url,
         '#access' => $this->entity->access('delete'),
-        '#attributes' => array(
-          'class' => array('button', 'button--danger'),
-        ),
-      );
+        '#attributes' => [
+          'class' => ['button', 'button--danger'],
+        ],
+      ];
     }
 
     return $actions;
@@ -161,7 +161,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     parent::submitForm($form, $form_state);
 
     // Handle the default value.
-    $default_value = array();
+    $default_value = [];
     if (isset($form['default_value'])) {
       $items = $form['#entity']->get($this->entity->getName());
       $default_value = $items->defaultValuesFormSubmit($form['default_value'], $form, $form_state);
@@ -175,7 +175,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
   public function save(array $form, FormStateInterface $form_state) {
     $this->entity->save();
 
-    drupal_set_message($this->t('Saved %label configuration.', array('%label' => $this->entity->getLabel())));
+    drupal_set_message($this->t('Saved %label configuration.', ['%label' => $this->entity->getLabel()]));
 
     $request = $this->getRequest();
     if (($destinations = $request->query->get('destinations')) && $next_destination = FieldUI::getNextDestination($destinations)) {
diff --git a/core/modules/field_ui/src/Form/FieldStorageAddForm.php b/core/modules/field_ui/src/Form/FieldStorageAddForm.php
index 231fd63a179cc9f9bfd63fa4f4a2055644973a8a..5e5a842282c7489de760c9d541ef99e35be713e2 100644
--- a/core/modules/field_ui/src/Form/FieldStorageAddForm.php
+++ b/core/modules/field_ui/src/Form/FieldStorageAddForm.php
@@ -101,65 +101,65 @@ public function buildForm(array $form, FormStateInterface $form_state, $entity_t
     $this->bundle = $form_state->get('bundle');
 
     // Gather valid field types.
-    $field_type_options = array();
+    $field_type_options = [];
     foreach ($this->fieldTypePluginManager->getGroupedDefinitions($this->fieldTypePluginManager->getUiDefinitions()) as $category => $field_types) {
       foreach ($field_types as $name => $field_type) {
         $field_type_options[$category][$name] = $field_type['label'];
       }
     }
 
-    $form['add'] = array(
+    $form['add'] = [
       '#type' => 'container',
-      '#attributes' => array('class' => array('form--inline', 'clearfix')),
-    );
+      '#attributes' => ['class' => ['form--inline', 'clearfix']],
+    ];
 
-    $form['add']['new_storage_type'] = array(
+    $form['add']['new_storage_type'] = [
       '#type' => 'select',
       '#title' => $this->t('Add a new field'),
       '#options' => $field_type_options,
       '#empty_option' => $this->t('- Select a field type -'),
-    );
+    ];
 
     // Re-use existing field.
     if ($existing_field_storage_options = $this->getExistingFieldStorageOptions()) {
-      $form['add']['separator'] = array(
+      $form['add']['separator'] = [
         '#type' => 'item',
         '#markup' => $this->t('or'),
-      );
-      $form['add']['existing_storage_name'] = array(
+      ];
+      $form['add']['existing_storage_name'] = [
         '#type' => 'select',
         '#title' => $this->t('Re-use an existing field'),
         '#options' => $existing_field_storage_options,
         '#empty_option' => $this->t('- Select an existing field -'),
-      );
+      ];
 
       $form['#attached']['drupalSettings']['existingFieldLabels'] = $this->getExistingFieldLabels(array_keys($existing_field_storage_options));
     }
     else {
       // Provide a placeholder form element to simplify the validation code.
-      $form['add']['existing_storage_name'] = array(
+      $form['add']['existing_storage_name'] = [
         '#type' => 'value',
         '#value' => FALSE,
-      );
+      ];
     }
 
     // Field label and field_name.
-    $form['new_storage_wrapper'] = array(
+    $form['new_storage_wrapper'] = [
       '#type' => 'container',
-      '#states' => array(
-        '!visible' => array(
-          ':input[name="new_storage_type"]' => array('value' => ''),
-        ),
-      ),
-    );
-    $form['new_storage_wrapper']['label'] = array(
+      '#states' => [
+        '!visible' => [
+          ':input[name="new_storage_type"]' => ['value' => ''],
+        ],
+      ],
+    ];
+    $form['new_storage_wrapper']['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label'),
       '#size' => 15,
-    );
+    ];
 
     $field_prefix = $this->config('field_ui.settings')->get('field_prefix');
-    $form['new_storage_wrapper']['field_name'] = array(
+    $form['new_storage_wrapper']['field_name'] = [
       '#type' => 'machine_name',
       // This field should stay LTR even for RTL languages.
       '#field_prefix' => '<span dir="ltr">' . $field_prefix,
@@ -169,44 +169,44 @@ public function buildForm(array $form, FormStateInterface $form_state, $entity_t
       // Calculate characters depending on the length of the field prefix
       // setting. Maximum length is 32.
       '#maxlength' => FieldStorageConfig::NAME_MAX_LENGTH - strlen($field_prefix),
-      '#machine_name' => array(
-        'source' => array('new_storage_wrapper', 'label'),
-        'exists' => array($this, 'fieldNameExists'),
-      ),
+      '#machine_name' => [
+        'source' => ['new_storage_wrapper', 'label'],
+        'exists' => [$this, 'fieldNameExists'],
+      ],
       '#required' => FALSE,
-    );
+    ];
 
     // Provide a separate label element for the "Re-use existing field" case
     // and place it outside the $form['add'] wrapper because those elements
     // are displayed inline.
     if ($existing_field_storage_options) {
-      $form['existing_storage_label'] = array(
+      $form['existing_storage_label'] = [
         '#type' => 'textfield',
         '#title' => $this->t('Label'),
         '#size' => 15,
-        '#states' => array(
-          '!visible' => array(
-            ':input[name="existing_storage_name"]' => array('value' => ''),
-          ),
-        ),
-      );
+        '#states' => [
+          '!visible' => [
+            ':input[name="existing_storage_name"]' => ['value' => ''],
+          ],
+        ],
+      ];
     }
 
     // Place the 'translatable' property as an explicit value so that contrib
     // modules can form_alter() the value for newly created fields. By default
     // we create field storage as translatable so it will be possible to enable
     // translation at field level.
-    $form['translatable'] = array(
+    $form['translatable'] = [
       '#type' => 'value',
       '#value' => TRUE,
-    );
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save and continue'),
       '#button_type' => 'primary',
-    );
+    ];
 
     $form['#attached']['library'][] = 'field_ui/drupal.field_ui';
 
@@ -290,7 +290,7 @@ protected function validateAddExisting(array $form, FormStateInterface $form_sta
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $error = FALSE;
     $values = $form_state->getValues();
-    $destinations = array();
+    $destinations = [];
     $entity_type = $this->entityManager->getDefinition($this->entityTypeId);
 
     // Create new field.
@@ -321,7 +321,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
         // Merge in preconfigured field storage options.
         if (isset($field_options['field_storage_config'])) {
-          foreach (array('cardinality', 'settings') as $key) {
+          foreach (['cardinality', 'settings'] as $key) {
             if (isset($field_options['field_storage_config'][$key])) {
               $field_storage_values[$key] = $field_options['field_storage_config'][$key];
             }
@@ -330,7 +330,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
         // Merge in preconfigured field options.
         if (isset($field_options['field_config'])) {
-          foreach (array('required', 'settings') as $key) {
+          foreach (['required', 'settings'] as $key) {
             if (isset($field_options['field_config'][$key])) {
               $field_values[$key] = $field_options['field_config'][$key];
             }
@@ -352,19 +352,19 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
         // Always show the field settings step, as the cardinality needs to be
         // configured for new fields.
-        $route_parameters = array(
+        $route_parameters = [
           'field_config' => $field->id(),
-        ) + FieldUI::getRouteBundleParameter($entity_type, $this->bundle);
-        $destinations[] = array('route_name' => "entity.field_config.{$this->entityTypeId}_storage_edit_form", 'route_parameters' => $route_parameters);
-        $destinations[] = array('route_name' => "entity.field_config.{$this->entityTypeId}_field_edit_form", 'route_parameters' => $route_parameters);
-        $destinations[] = array('route_name' => "entity.{$this->entityTypeId}.field_ui_fields", 'route_parameters' => $route_parameters);
+        ] + FieldUI::getRouteBundleParameter($entity_type, $this->bundle);
+        $destinations[] = ['route_name' => "entity.field_config.{$this->entityTypeId}_storage_edit_form", 'route_parameters' => $route_parameters];
+        $destinations[] = ['route_name' => "entity.field_config.{$this->entityTypeId}_field_edit_form", 'route_parameters' => $route_parameters];
+        $destinations[] = ['route_name' => "entity.{$this->entityTypeId}.field_ui_fields", 'route_parameters' => $route_parameters];
 
         // Store new field information for any additional submit handlers.
         $form_state->set(['fields_added', '_add_new_field'], $values['field_name']);
       }
       catch (\Exception $e) {
         $error = TRUE;
-        drupal_set_message($this->t('There was a problem creating field %label: @message', array('%label' => $values['label'], '@message' => $e->getMessage())), 'error');
+        drupal_set_message($this->t('There was a problem creating field %label: @message', ['%label' => $values['label'], '@message' => $e->getMessage()]), 'error');
       }
     }
 
@@ -373,29 +373,29 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $field_name = $values['existing_storage_name'];
 
       try {
-        $field = $this->entityManager->getStorage('field_config')->create(array(
+        $field = $this->entityManager->getStorage('field_config')->create([
           'field_name' => $field_name,
           'entity_type' => $this->entityTypeId,
           'bundle' => $this->bundle,
           'label' => $values['existing_storage_label'],
-        ));
+        ]);
         $field->save();
 
         $this->configureEntityFormDisplay($field_name);
         $this->configureEntityViewDisplay($field_name);
 
-        $route_parameters = array(
+        $route_parameters = [
           'field_config' => $field->id(),
-        ) + FieldUI::getRouteBundleParameter($entity_type, $this->bundle);
-        $destinations[] = array('route_name' => "entity.field_config.{$this->entityTypeId}_field_edit_form", 'route_parameters' => $route_parameters);
-        $destinations[] = array('route_name' => "entity.{$this->entityTypeId}.field_ui_fields", 'route_parameters' => $route_parameters);
+        ] + FieldUI::getRouteBundleParameter($entity_type, $this->bundle);
+        $destinations[] = ['route_name' => "entity.field_config.{$this->entityTypeId}_field_edit_form", 'route_parameters' => $route_parameters];
+        $destinations[] = ['route_name' => "entity.{$this->entityTypeId}.field_ui_fields", 'route_parameters' => $route_parameters];
 
         // Store new field information for any additional submit handlers.
         $form_state->set(['fields_added', '_add_existing_field'], $field_name);
       }
       catch (\Exception $e) {
         $error = TRUE;
-        drupal_set_message($this->t('There was a problem creating field %label: @message', array('%label' => $values['label'], '@message' => $e->getMessage())), 'error');
+        drupal_set_message($this->t('There was a problem creating field %label: @message', ['%label' => $values['label'], '@message' => $e->getMessage()]), 'error');
       }
     }
 
@@ -452,7 +452,7 @@ protected function configureEntityViewDisplay($field_name, $formatter_id = NULL)
    *   An array of existing field storages keyed by name.
    */
   protected function getExistingFieldStorageOptions() {
-    $options = array();
+    $options = [];
     // Load the field_storages and build the list of options.
     $field_types = $this->fieldTypePluginManager->getDefinitions();
     foreach ($this->entityManager->getFieldStorageDefinitions($this->entityTypeId) as $field_name => $field_storage) {
@@ -466,10 +466,10 @@ protected function getExistingFieldStorageOptions() {
         && !$field_storage->isLocked()
         && empty($field_types[$field_type]['no_ui'])
         && !in_array($this->bundle, $field_storage->getBundles(), TRUE)) {
-        $options[$field_name] = $this->t('@type: @field', array(
+        $options[$field_name] = $this->t('@type: @field', [
           '@type' => $field_types[$field_type]['label'],
           '@field' => $field_name,
-        ));
+        ]);
       }
     }
     asort($options);
@@ -500,7 +500,7 @@ protected function getExistingFieldLabels(array $field_names) {
     $fields = $this->entityManager->getStorage('field_config')->loadMultiple($field_ids);
 
     // Go through all the fields and use the label of the first encounter.
-    $labels = array();
+    $labels = [];
     foreach ($fields as $field) {
       if (!isset($labels[$field->getName()])) {
         $labels[$field->getName()] = $field->label();
diff --git a/core/modules/field_ui/src/Form/FieldStorageConfigEditForm.php b/core/modules/field_ui/src/Form/FieldStorageConfigEditForm.php
index bbaeb63322d9fed4a5fb749318ad0a03d6f4231d..a0c1294d9da15cc6e823bbd11b2fa98f0103bb9d 100644
--- a/core/modules/field_ui/src/Form/FieldStorageConfigEditForm.php
+++ b/core/modules/field_ui/src/Form/FieldStorageConfigEditForm.php
@@ -62,7 +62,7 @@ public function form(array $form, FormStateInterface $form_state) {
 
     $field_label = $form_state->get('field_config')->label();
     $form['#title'] = $field_label;
-    $form['#prefix'] = '<p>' . $this->t('These settings apply to the %field field everywhere it is used. These settings impact the way that data is stored in the database and cannot be changed once data has been created.', array('%field' => $field_label)) . '</p>';
+    $form['#prefix'] = '<p>' . $this->t('These settings apply to the %field field everywhere it is used. These settings impact the way that data is stored in the database and cannot be changed once data has been created.', ['%field' => $field_label]) . '</p>';
 
     // See if data already exists for this field.
     // If so, prevent changes to the field settings.
@@ -73,17 +73,17 @@ public function form(array $form, FormStateInterface $form_state) {
     // Add settings provided by the field module. The field module is
     // responsible for not returning settings that cannot be changed if
     // the field already has data.
-    $form['settings'] = array(
+    $form['settings'] = [
       '#weight' => -10,
       '#tree' => TRUE,
-    );
+    ];
     // Create an arbitrary entity object, so that we can have an instantiated
     // FieldItem.
-    $ids = (object) array(
+    $ids = (object) [
       'entity_type' => $form_state->get('entity_type_id'),
       'bundle' => $form_state->get('bundle'),
       'entity_id' => NULL
-    );
+    ];
     $entity = _field_create_entity_from_ids($ids);
     $items = $entity->get($this->entity->getName());
     $item = $items->first() ?: $items->appendItem();
@@ -91,43 +91,43 @@ public function form(array $form, FormStateInterface $form_state) {
 
     // Build the configurable field values.
     $cardinality = $this->entity->getCardinality();
-    $form['cardinality_container'] = array(
+    $form['cardinality_container'] = [
       // Reset #parents so the additional container does not appear.
-      '#parents' => array(),
+      '#parents' => [],
       '#type' => 'fieldset',
       '#title' => $this->t('Allowed number of values'),
-      '#attributes' => array('class' => array(
+      '#attributes' => ['class' => [
         'container-inline',
         'fieldgroup',
         'form-composite'
-      )),
-    );
-    $form['cardinality_container']['cardinality'] = array(
+      ]],
+    ];
+    $form['cardinality_container']['cardinality'] = [
       '#type' => 'select',
       '#title' => $this->t('Allowed number of values'),
       '#title_display' => 'invisible',
-      '#options' => array(
+      '#options' => [
         'number' => $this->t('Limited'),
         FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED => $this->t('Unlimited'),
-      ),
+      ],
       '#default_value' => ($cardinality == FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED) ? FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED : 'number',
-    );
-    $form['cardinality_container']['cardinality_number'] = array(
+    ];
+    $form['cardinality_container']['cardinality_number'] = [
       '#type' => 'number',
       '#default_value' => $cardinality != FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED ? $cardinality : 1,
       '#min' => 1,
       '#title' => $this->t('Limit'),
       '#title_display' => 'invisible',
       '#size' => 2,
-      '#states' => array(
-        'visible' => array(
-         ':input[name="cardinality"]' => array('value' => 'number'),
-        ),
-        'disabled' => array(
-         ':input[name="cardinality"]' => array('value' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+         ':input[name="cardinality"]' => ['value' => 'number'],
+        ],
+        'disabled' => [
+         ':input[name="cardinality"]' => ['value' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED],
+        ],
+      ],
+    ];
 
     return $form;
   }
@@ -190,7 +190,7 @@ public function save(array $form, FormStateInterface $form_state) {
     $field_label = $form_state->get('field_config')->label();
     try {
       $this->entity->save();
-      drupal_set_message($this->t('Updated field %label field settings.', array('%label' => $field_label)));
+      drupal_set_message($this->t('Updated field %label field settings.', ['%label' => $field_label]));
       $request = $this->getRequest();
       if (($destinations = $request->query->get('destinations')) && $next_destination = FieldUI::getNextDestination($destinations)) {
         $request->query->remove('destinations');
@@ -201,7 +201,7 @@ public function save(array $form, FormStateInterface $form_state) {
       }
     }
     catch (\Exception $e) {
-      drupal_set_message($this->t('Attempt to update field %label failed: %message.', array('%label' => $field_label, '%message' => $e->getMessage())), 'error');
+      drupal_set_message($this->t('Attempt to update field %label failed: %message.', ['%label' => $field_label, '%message' => $e->getMessage()]), 'error');
     }
   }
 
diff --git a/core/modules/field_ui/src/Plugin/Derivative/FieldUiLocalAction.php b/core/modules/field_ui/src/Plugin/Derivative/FieldUiLocalAction.php
index 4d81c8b5df12b4783a011a713b9cc79ec888464c..b92d702590dd99e1bbde4c628f210a4a1904e55d 100644
--- a/core/modules/field_ui/src/Plugin/Derivative/FieldUiLocalAction.php
+++ b/core/modules/field_ui/src/Plugin/Derivative/FieldUiLocalAction.php
@@ -50,15 +50,15 @@ public static function create(ContainerInterface $container, $base_plugin_id) {
    * {@inheritdoc}
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    $this->derivatives = array();
+    $this->derivatives = [];
 
     foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
       if ($entity_type->get('field_ui_base_route')) {
-        $this->derivatives["field_storage_config_add_$entity_type_id"] = array(
+        $this->derivatives["field_storage_config_add_$entity_type_id"] = [
           'route_name' => "field_ui.field_storage_config_add_$entity_type_id",
           'title' => $this->t('Add field'),
-          'appears_on' => array("entity.$entity_type_id.field_ui_fields"),
-        );
+          'appears_on' => ["entity.$entity_type_id.field_ui_fields"],
+        ];
       }
     }
 
diff --git a/core/modules/field_ui/src/Plugin/Derivative/FieldUiLocalTask.php b/core/modules/field_ui/src/Plugin/Derivative/FieldUiLocalTask.php
index 3ebf95994b1a76137507913e9b3ba9eb3de2ff1f..6d95abdd1a86745187102f447c25597fc8287086 100644
--- a/core/modules/field_ui/src/Plugin/Derivative/FieldUiLocalTask.php
+++ b/core/modules/field_ui/src/Plugin/Derivative/FieldUiLocalTask.php
@@ -61,46 +61,46 @@ public static function create(ContainerInterface $container, $base_plugin_id) {
    * {@inheritdoc}
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    $this->derivatives = array();
+    $this->derivatives = [];
 
     foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
       if ($entity_type->get('field_ui_base_route')) {
-        $this->derivatives["overview_$entity_type_id"] = array(
+        $this->derivatives["overview_$entity_type_id"] = [
           'route_name' => "entity.$entity_type_id.field_ui_fields",
           'weight' => 1,
           'title' => $this->t('Manage fields'),
           'base_route' => "entity.$entity_type_id.field_ui_fields",
-        );
+        ];
 
         // 'Manage form display' tab.
-        $this->derivatives["form_display_overview_$entity_type_id"] = array(
+        $this->derivatives["form_display_overview_$entity_type_id"] = [
           'route_name' => "entity.entity_form_display.$entity_type_id.default",
           'weight' => 2,
           'title' => $this->t('Manage form display'),
           'base_route' => "entity.$entity_type_id.field_ui_fields",
-        );
+        ];
 
         // 'Manage display' tab.
-        $this->derivatives["display_overview_$entity_type_id"] = array(
+        $this->derivatives["display_overview_$entity_type_id"] = [
           'route_name' => "entity.entity_view_display.$entity_type_id.default",
           'weight' => 3,
           'title' => $this->t('Manage display'),
           'base_route' => "entity.$entity_type_id.field_ui_fields",
-        );
+        ];
 
         // Field edit tab.
-        $this->derivatives["field_edit_$entity_type_id"] = array(
+        $this->derivatives["field_edit_$entity_type_id"] = [
           'route_name' => "entity.field_config.{$entity_type_id}_field_edit_form",
           'title' => $this->t('Edit'),
           'base_route' => "entity.field_config.{$entity_type_id}_field_edit_form",
-        );
+        ];
 
         // Field settings tab.
-        $this->derivatives["field_storage_$entity_type_id"] = array(
+        $this->derivatives["field_storage_$entity_type_id"] = [
           'route_name' => "entity.field_config.{$entity_type_id}_storage_edit_form",
           'title' => $this->t('Field settings'),
           'base_route' => "entity.field_config.{$entity_type_id}_field_edit_form",
-        );
+        ];
 
         // View and form modes secondary tabs.
         // The same base $path for the menu item (with a placeholder) can be
@@ -109,47 +109,47 @@ public function getDerivativeDefinitions($base_plugin_definition) {
         // modes available for customisation. So we define menu items for all
         // view modes, and use a route requirement to determine which ones are
         // actually visible for a given bundle.
-        $this->derivatives['field_form_display_default_' . $entity_type_id] = array(
+        $this->derivatives['field_form_display_default_' . $entity_type_id] = [
           'title' => 'Default',
           'route_name' => "entity.entity_form_display.$entity_type_id.default",
           'parent_id' => "field_ui.fields:form_display_overview_$entity_type_id",
           'weight' => -1,
-        );
-        $this->derivatives['field_display_default_' . $entity_type_id] = array(
+        ];
+        $this->derivatives['field_display_default_' . $entity_type_id] = [
           'title' => 'Default',
           'route_name' => "entity.entity_view_display.$entity_type_id.default",
           'parent_id' => "field_ui.fields:display_overview_$entity_type_id",
           'weight' => -1,
-        );
+        ];
 
         // One local task for each form mode.
         $weight = 0;
         foreach ($this->entityManager->getFormModes($entity_type_id) as $form_mode => $form_mode_info) {
-          $this->derivatives['field_form_display_' . $form_mode . '_' . $entity_type_id] = array(
+          $this->derivatives['field_form_display_' . $form_mode . '_' . $entity_type_id] = [
             'title' => $form_mode_info['label'],
             'route_name' => "entity.entity_form_display.$entity_type_id.form_mode",
-            'route_parameters' => array(
+            'route_parameters' => [
               'form_mode_name' => $form_mode,
-            ),
+            ],
             'parent_id' => "field_ui.fields:form_display_overview_$entity_type_id",
             'weight' => $weight++,
             'cache_tags' => $this->entityManager->getDefinition('entity_form_display')->getListCacheTags(),
-          );
+          ];
         }
 
         // One local task for each view mode.
         $weight = 0;
         foreach ($this->entityManager->getViewModes($entity_type_id) as $view_mode => $form_mode_info) {
-          $this->derivatives['field_display_' . $view_mode . '_' . $entity_type_id] = array(
+          $this->derivatives['field_display_' . $view_mode . '_' . $entity_type_id] = [
             'title' => $form_mode_info['label'],
             'route_name' => "entity.entity_view_display.$entity_type_id.view_mode",
-            'route_parameters' => array(
+            'route_parameters' => [
               'view_mode_name' => $view_mode,
-            ),
+            ],
             'parent_id' => "field_ui.fields:display_overview_$entity_type_id",
             'weight' => $weight++,
             'cache_tags' => $this->entityManager->getDefinition('entity_view_display')->getListCacheTags(),
-          );
+          ];
         }
       }
     }
diff --git a/core/modules/field_ui/src/Routing/RouteSubscriber.php b/core/modules/field_ui/src/Routing/RouteSubscriber.php
index 696a0494f295006cd1839e1732ac50a34e0ca18e..b08e7f8fe5832b09ada3c719fd8e77db6d26a655 100644
--- a/core/modules/field_ui/src/Routing/RouteSubscriber.php
+++ b/core/modules/field_ui/src/Routing/RouteSubscriber.php
@@ -44,16 +44,16 @@ protected function alterRoutes(RouteCollection $collection) {
 
         $options = $entity_route->getOptions();
         if ($bundle_entity_type = $entity_type->getBundleEntityType()) {
-          $options['parameters'][$bundle_entity_type] = array(
+          $options['parameters'][$bundle_entity_type] = [
             'type' => 'entity:' . $bundle_entity_type,
-          );
+          ];
         }
         // Special parameter used to easily recognize all Field UI routes.
         $options['_field_ui'] = TRUE;
 
-        $defaults = array(
+        $defaults = [
           'entity_type_id' => $entity_type_id,
-        );
+        ];
         // If the entity type has no bundles and it doesn't use {bundle} in its
         // admin path, use the entity type.
         if (strpos($path, '{bundle}') === FALSE) {
@@ -62,95 +62,95 @@ protected function alterRoutes(RouteCollection $collection) {
 
         $route = new Route(
           "$path/fields/{field_config}",
-          array(
+          [
             '_entity_form' => 'field_config.edit',
             '_title_callback' => '\Drupal\field_ui\Form\FieldConfigEditForm::getTitle',
-          ) + $defaults,
-          array('_entity_access' => 'field_config.update'),
+          ] + $defaults,
+          ['_entity_access' => 'field_config.update'],
           $options
         );
         $collection->add("entity.field_config.{$entity_type_id}_field_edit_form", $route);
 
         $route = new Route(
           "$path/fields/{field_config}/storage",
-          array('_entity_form' => 'field_storage_config.edit') + $defaults,
-          array('_permission' => 'administer ' . $entity_type_id . ' fields'),
+          ['_entity_form' => 'field_storage_config.edit'] + $defaults,
+          ['_permission' => 'administer ' . $entity_type_id . ' fields'],
           $options
         );
         $collection->add("entity.field_config.{$entity_type_id}_storage_edit_form", $route);
 
         $route = new Route(
           "$path/fields/{field_config}/delete",
-          array('_entity_form' => 'field_config.delete') + $defaults,
-          array('_entity_access' => 'field_config.delete'),
+          ['_entity_form' => 'field_config.delete'] + $defaults,
+          ['_entity_access' => 'field_config.delete'],
           $options
         );
         $collection->add("entity.field_config.{$entity_type_id}_field_delete_form", $route);
 
         $route = new Route(
           "$path/fields",
-          array(
+          [
             '_controller' => '\Drupal\field_ui\Controller\FieldConfigListController::listing',
             '_title' => 'Manage fields',
-          ) + $defaults,
-          array('_permission' => 'administer ' . $entity_type_id . ' fields'),
+          ] + $defaults,
+          ['_permission' => 'administer ' . $entity_type_id . ' fields'],
           $options
         );
         $collection->add("entity.{$entity_type_id}.field_ui_fields", $route);
 
         $route = new Route(
           "$path/fields/add-field",
-          array(
+          [
             '_form' => '\Drupal\field_ui\Form\FieldStorageAddForm',
             '_title' => 'Add field',
-          ) + $defaults,
-          array('_permission' => 'administer ' . $entity_type_id . ' fields'),
+          ] + $defaults,
+          ['_permission' => 'administer ' . $entity_type_id . ' fields'],
           $options
         );
         $collection->add("field_ui.field_storage_config_add_$entity_type_id", $route);
 
         $route = new Route(
           "$path/form-display",
-          array(
+          [
             '_entity_form' => 'entity_form_display.edit',
             '_title' => 'Manage form display',
             'form_mode_name' => 'default',
-          ) + $defaults,
-          array('_field_ui_form_mode_access' => 'administer ' . $entity_type_id . ' form display'),
+          ] + $defaults,
+          ['_field_ui_form_mode_access' => 'administer ' . $entity_type_id . ' form display'],
           $options
         );
         $collection->add("entity.entity_form_display.{$entity_type_id}.default", $route);
 
         $route = new Route(
           "$path/form-display/{form_mode_name}",
-          array(
+          [
             '_entity_form' => 'entity_form_display.edit',
             '_title' => 'Manage form display',
-          ) + $defaults,
-          array('_field_ui_form_mode_access' => 'administer ' . $entity_type_id . ' form display'),
+          ] + $defaults,
+          ['_field_ui_form_mode_access' => 'administer ' . $entity_type_id . ' form display'],
           $options
         );
         $collection->add("entity.entity_form_display.{$entity_type_id}.form_mode", $route);
 
         $route = new Route(
           "$path/display",
-          array(
+          [
             '_entity_form' => 'entity_view_display.edit',
             '_title' => 'Manage display',
             'view_mode_name' => 'default',
-          ) + $defaults,
-          array('_field_ui_view_mode_access' => 'administer ' . $entity_type_id . ' display'),
+          ] + $defaults,
+          ['_field_ui_view_mode_access' => 'administer ' . $entity_type_id . ' display'],
           $options
         );
         $collection->add("entity.entity_view_display.{$entity_type_id}.default", $route);
 
         $route = new Route(
           "$path/display/{view_mode_name}",
-          array(
+          [
             '_entity_form' => 'entity_view_display.edit',
             '_title' => 'Manage display',
-          ) + $defaults,
-          array('_field_ui_view_mode_access' => 'administer ' . $entity_type_id . ' display'),
+          ] + $defaults,
+          ['_field_ui_view_mode_access' => 'administer ' . $entity_type_id . ' display'],
           $options
         );
         $collection->add("entity.entity_view_display.{$entity_type_id}.view_mode", $route);
@@ -163,7 +163,7 @@ protected function alterRoutes(RouteCollection $collection) {
    */
   public static function getSubscribedEvents() {
     $events = parent::getSubscribedEvents();
-    $events[RoutingEvents::ALTER] = array('onAlterRoutes', -100);
+    $events[RoutingEvents::ALTER] = ['onAlterRoutes', -100];
     return $events;
   }
 
diff --git a/core/modules/field_ui/src/Tests/FieldUIDeleteTest.php b/core/modules/field_ui/src/Tests/FieldUIDeleteTest.php
index 59469ac9bda7e1c8d434feae9742f57d1f38baf5..542a99cfeeea33918dcf9a063398406b55e9250a 100644
--- a/core/modules/field_ui/src/Tests/FieldUIDeleteTest.php
+++ b/core/modules/field_ui/src/Tests/FieldUIDeleteTest.php
@@ -21,14 +21,14 @@ class FieldUIDeleteTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_ui', 'field_test', 'block', 'field_test_views');
+  public static $modules = ['node', 'field_ui', 'field_test', 'block', 'field_test_views'];
 
   /**
    * Test views to enable
    *
    * @var string[]
    */
-  public static $testViews = array('test_view_field_delete');
+  public static $testViews = ['test_view_field_delete'];
 
   /**
    * {@inheritdoc}
@@ -41,7 +41,7 @@ protected function setUp() {
     $this->drupalPlaceBlock('page_title_block');
 
     // Create a test user.
-    $admin_user = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer users', 'administer account settings', 'administer user display', 'bypass node access'));
+    $admin_user = $this->drupalCreateUser(['access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer users', 'administer account settings', 'administer user display', 'bypass node access']);
     $this->drupalLogin($admin_user);
   }
 
@@ -55,7 +55,7 @@ function testDeleteField() {
 
     // Create an additional node type.
     $type_name1 = strtolower($this->randomMachineName(8)) . '_test';
-    $type1 = $this->drupalCreateContentType(array('name' => $type_name1, 'type' => $type_name1));
+    $type1 = $this->drupalCreateContentType(['name' => $type_name1, 'type' => $type_name1]);
     $type_name1 = $type1->id();
 
     // Create a new field.
@@ -64,7 +64,7 @@ function testDeleteField() {
 
     // Create an additional node type.
     $type_name2 = strtolower($this->randomMachineName(8)) . '_test';
-    $type2 = $this->drupalCreateContentType(array('name' => $type_name2, 'type' => $type_name2));
+    $type2 = $this->drupalCreateContentType(['name' => $type_name2, 'type' => $type_name2]);
     $type_name2 = $type2->id();
 
     // Add a field to the second node type.
@@ -72,7 +72,7 @@ function testDeleteField() {
     $this->fieldUIAddExistingField($bundle_path2, $field_name, $field_label);
 
     \Drupal::service('module_installer')->install(['views']);
-    ViewTestData::createTestViews(get_class($this), array('field_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['field_test_views']);
 
     // Check the config dependencies of the first field, the field storage must
     // not be shown as being deleted yet.
diff --git a/core/modules/field_ui/src/Tests/FieldUiTestTrait.php b/core/modules/field_ui/src/Tests/FieldUiTestTrait.php
index 9bb0ecb0d1ce6601b2d6e290402c95f87b14f18a..39c41a302736972706a7f58da4897561746ee23d 100644
--- a/core/modules/field_ui/src/Tests/FieldUiTestTrait.php
+++ b/core/modules/field_ui/src/Tests/FieldUiTestTrait.php
@@ -26,13 +26,13 @@ trait FieldUiTestTrait {
    *   (optional) $edit parameter for drupalPostForm() on the third step ('Field
    *   settings' form).
    */
-  public function fieldUIAddNewField($bundle_path, $field_name, $label = NULL, $field_type = 'test_field', array $storage_edit = array(), array $field_edit = array()) {
+  public function fieldUIAddNewField($bundle_path, $field_name, $label = NULL, $field_type = 'test_field', array $storage_edit = [], array $field_edit = []) {
     $label = $label ?: $this->randomString();
-    $initial_edit = array(
+    $initial_edit = [
       'new_storage_type' => $field_type,
       'label' => $label,
       'field_name' => $field_name,
-    );
+    ];
 
     // Allow the caller to set a NULL path in case they navigated to the right
     // page before calling this method.
@@ -42,17 +42,17 @@ public function fieldUIAddNewField($bundle_path, $field_name, $label = NULL, $fi
 
     // First step: 'Add field' page.
     $this->drupalPostForm($bundle_path, $initial_edit, t('Save and continue'));
-    $this->assertRaw(t('These settings apply to the %label field everywhere it is used.', array('%label' => $label)), 'Storage settings page was displayed.');
+    $this->assertRaw(t('These settings apply to the %label field everywhere it is used.', ['%label' => $label]), 'Storage settings page was displayed.');
     // Test Breadcrumbs.
     $this->assertLink($label, 0, 'Field label is correct in the breadcrumb of the storage settings page.');
 
     // Second step: 'Storage settings' form.
     $this->drupalPostForm(NULL, $storage_edit, t('Save field settings'));
-    $this->assertRaw(t('Updated field %label field settings.', array('%label' => $label)), 'Redirected to field settings page.');
+    $this->assertRaw(t('Updated field %label field settings.', ['%label' => $label]), 'Redirected to field settings page.');
 
     // Third step: 'Field settings' form.
     $this->drupalPostForm(NULL, $field_edit, t('Save settings'));
-    $this->assertRaw(t('Saved %label configuration.', array('%label' => $label)), 'Redirected to "Manage fields" page.');
+    $this->assertRaw(t('Saved %label configuration.', ['%label' => $label]), 'Redirected to "Manage fields" page.');
 
     // Check that the field appears in the overview form.
     $this->assertFieldByXPath('//table[@id="field-overview"]//tr/td[1]', $label, 'Field was created and appears in the overview page.');
@@ -72,12 +72,12 @@ public function fieldUIAddNewField($bundle_path, $field_name, $label = NULL, $fi
    *   (optional) $edit parameter for drupalPostForm() on the second step
    *   ('Field settings' form).
    */
-  public function fieldUIAddExistingField($bundle_path, $existing_storage_name, $label = NULL, array $field_edit = array()) {
+  public function fieldUIAddExistingField($bundle_path, $existing_storage_name, $label = NULL, array $field_edit = []) {
     $label = $label ?: $this->randomString();
-    $initial_edit = array(
+    $initial_edit = [
       'existing_storage_name' => $existing_storage_name,
       'existing_storage_label' => $label,
-    );
+    ];
 
     // First step: 'Re-use existing field' on the 'Add field' page.
     $this->drupalPostForm("$bundle_path/fields/add-field", $initial_edit, t('Save and continue'));
@@ -90,7 +90,7 @@ public function fieldUIAddExistingField($bundle_path, $existing_storage_name, $l
 
     // Second step: 'Field settings' form.
     $this->drupalPostForm(NULL, $field_edit, t('Save settings'));
-    $this->assertRaw(t('Saved %label configuration.', array('%label' => $label)), 'Redirected to "Manage fields" page.');
+    $this->assertRaw(t('Saved %label configuration.', ['%label' => $label]), 'Redirected to "Manage fields" page.');
 
     // Check that the field appears in the overview form.
     $this->assertFieldByXPath('//table[@id="field-overview"]//tr/td[1]', $label, 'Field was created and appears in the overview page.');
@@ -111,14 +111,14 @@ public function fieldUIAddExistingField($bundle_path, $existing_storage_name, $l
   public function fieldUIDeleteField($bundle_path, $field_name, $label, $bundle_label) {
     // Display confirmation form.
     $this->drupalGet("$bundle_path/fields/$field_name/delete");
-    $this->assertRaw(t('Are you sure you want to delete the field %label', array('%label' => $label)), 'Delete confirmation was found.');
+    $this->assertRaw(t('Are you sure you want to delete the field %label', ['%label' => $label]), 'Delete confirmation was found.');
 
     // Test Breadcrumbs.
     $this->assertLink($label, 0, 'Field label is correct in the breadcrumb of the field delete page.');
 
     // Submit confirmation form.
-    $this->drupalPostForm(NULL, array(), t('Delete'));
-    $this->assertRaw(t('The field %label has been deleted from the %type content type.', array('%label' => $label, '%type' => $bundle_label)), 'Delete message was found.');
+    $this->drupalPostForm(NULL, [], t('Delete'));
+    $this->assertRaw(t('The field %label has been deleted from the %type content type.', ['%label' => $label, '%type' => $bundle_label]), 'Delete message was found.');
 
     // Check that the field does not appear in the overview form.
     $this->assertNoFieldByXPath('//table[@id="field-overview"]//span[@class="label-field"]', $label, 'Field does not appear in the overview page.');
diff --git a/core/modules/field_ui/src/Tests/ManageDisplayTest.php b/core/modules/field_ui/src/Tests/ManageDisplayTest.php
index 902a193c1e6a9fc749621adb190d3baaacdd1069..9c8798fe282a7918cc77c1090df50d096c318ad6 100644
--- a/core/modules/field_ui/src/Tests/ManageDisplayTest.php
+++ b/core/modules/field_ui/src/Tests/ManageDisplayTest.php
@@ -25,7 +25,7 @@ class ManageDisplayTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_ui', 'taxonomy', 'search', 'field_test', 'field_third_party_test', 'block');
+  public static $modules = ['node', 'field_ui', 'taxonomy', 'search', 'field_test', 'field_third_party_test', 'block'];
 
   /**
    * {@inheritdoc}
@@ -35,24 +35,24 @@ protected function setUp() {
     $this->drupalPlaceBlock('system_breadcrumb_block');
 
     // Create a test user.
-    $admin_user = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer taxonomy', 'administer taxonomy_term fields', 'administer taxonomy_term display', 'administer users', 'administer account settings', 'administer user display', 'bypass node access'));
+    $admin_user = $this->drupalCreateUser(['access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer taxonomy', 'administer taxonomy_term fields', 'administer taxonomy_term display', 'administer users', 'administer account settings', 'administer user display', 'bypass node access']);
     $this->drupalLogin($admin_user);
 
     // Create content type, with underscores.
     $type_name = strtolower($this->randomMachineName(8)) . '_test';
-    $type = $this->drupalCreateContentType(array('name' => $type_name, 'type' => $type_name));
+    $type = $this->drupalCreateContentType(['name' => $type_name, 'type' => $type_name]);
     $this->type = $type->id();
 
     // Create a default vocabulary.
-    $vocabulary = Vocabulary::create(array(
+    $vocabulary = Vocabulary::create([
       'name' => $this->randomMachineName(),
       'description' => $this->randomMachineName(),
       'vid' => Unicode::strtolower($this->randomMachineName()),
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
       'help' => '',
-      'nodes' => array('article' => 'article'),
+      'nodes' => ['article' => 'article'],
       'weight' => mt_rand(0, 10),
-    ));
+    ]);
     $vocabulary->save();
     $this->vocabulary = $vocabulary->id();
   }
@@ -83,11 +83,11 @@ function testFormatterUI() {
     $this->assertText("$setting_name: $setting_value", 'The expected summary is displayed.');
 
     // Check whether formatter weights are respected.
-    $result = $this->xpath('//select[@id=:id]/option', array(':id' => 'edit-fields-field-test-type'));
+    $result = $this->xpath('//select[@id=:id]/option', [':id' => 'edit-fields-field-test-type']);
     $options = array_map(function($item) {
       return (string) $item->attributes()->value[0];
     }, $result);
-    $expected_options = array (
+    $expected_options =  [
       'field_no_settings',
       'field_empty_test',
       'field_empty_setting',
@@ -95,7 +95,7 @@ function testFormatterUI() {
       'field_test_multiple',
       'field_test_with_prepare_view',
       'field_test_applicable',
-    );
+    ];
     $this->assertEqual($options, $expected_options, 'The expected formatter ordering is respected.');
 
     // Ensure that fields can be hidden directly by changing the region.
@@ -115,12 +115,12 @@ function testFormatterUI() {
     $this->drupalPostForm($manage_display, $edit, t('Save'));
 
     // Change the formatter and check that the summary is updated.
-    $edit = array(
+    $edit = [
       'fields[field_test][type]' => 'field_test_multiple',
       'fields[field_test][region]' => 'content',
       'refresh_rows' => 'field_test'
-    );
-    $this->drupalPostAjaxForm(NULL, $edit, array('op' => t('Refresh')));
+    ];
+    $this->drupalPostAjaxForm(NULL, $edit, ['op' => t('Refresh')]);
     $format = 'field_test_multiple';
     $default_settings = \Drupal::service('plugin.manager.field.formatter')->getDefaultSettings($format);
     $setting_name = key($default_settings);
@@ -129,7 +129,7 @@ function testFormatterUI() {
     $this->assertText("$setting_name: $setting_value", 'The expected summary is displayed.');
 
     // Submit the form and check that the display is updated.
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $display = entity_get_display('node', $this->type, 'default');
     $display_options = $display->getComponent('field_test');
     $current_format = $display_options['type'];
@@ -142,17 +142,17 @@ function testFormatterUI() {
 
     // Click on the formatter settings button to open the formatter settings
     // form.
-    $this->drupalPostAjaxForm(NULL, array(), "field_test_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "field_test_settings_edit");
 
     // Assert that the field added in
     // field_test_field_formatter_third_party_settings_form() is present.
     $fieldname = 'fields[field_test][settings_edit_form][third_party_settings][field_third_party_test][field_test_field_formatter_third_party_settings_form]';
     $this->assertField($fieldname, 'The field added in hook_field_formatter_third_party_settings_form() is present on the settings form.');
-    $edit = array($fieldname => 'foo');
+    $edit = [$fieldname => 'foo'];
     $this->drupalPostAjaxForm(NULL, $edit, "field_test_plugin_settings_update");
 
     // Save the form to save the third party settings.
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     \Drupal::entityManager()->clearCachedFieldDefinitions();
     $id = 'node.' . $this->type . '.default';
@@ -163,42 +163,42 @@ function testFormatterUI() {
     $this->assertTrue(in_array('field_third_party_test', $display->calculateDependencies()->getDependencies()['module']), 'The display has a dependency on field_third_party_test module.');
 
     // Confirm that the third party settings are not updated on the settings form.
-    $this->drupalPostAjaxForm(NULL, array(), "field_test_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "field_test_settings_edit");
     $this->assertFieldByName($fieldname, '');
 
     // Test the empty setting formatter.
-    $edit = array(
+    $edit = [
       'fields[field_test][type]' => 'field_empty_setting',
       'fields[field_test][region]' => 'content',
-      );
+      ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertNoText('Default empty setting now has a value.');
     $this->assertFieldById('edit-fields-field-test-settings-edit');
-    $this->drupalPostAjaxForm(NULL, array(), "field_test_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "field_test_settings_edit");
     $fieldname = 'fields[field_test][settings_edit_form][settings][field_empty_setting]';
-    $edit = array($fieldname => 'non empty setting');
+    $edit = [$fieldname => 'non empty setting'];
     $this->drupalPostAjaxForm(NULL, $edit, "field_test_plugin_settings_update");
     $this->assertText('Default empty setting now has a value.');
 
     // Test the settings form behavior. An edit button should be present since
     // there are third party settings to configure.
-    $edit = array(
+    $edit = [
       'fields[field_test][type]' => 'field_no_settings',
       'fields[field_test][region]' => 'content',
       'refresh_rows' => 'field_test',
-    );
-    $this->drupalPostAjaxForm(NULL, $edit, array('op' => t('Refresh')));
+    ];
+    $this->drupalPostAjaxForm(NULL, $edit, ['op' => t('Refresh')]);
     $this->assertFieldByName('field_test_settings_edit');
 
     // Make sure we can save the third party settings when there are no settings available
-    $this->drupalPostAjaxForm(NULL, array(), "field_test_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "field_test_settings_edit");
     $this->drupalPostAjaxForm(NULL, $edit, "field_test_plugin_settings_update");
 
     // When a module providing third-party settings to a formatter (or widget)
     // is uninstalled, the formatter remains enabled but the provided settings,
     // together with the corresponding form elements, are removed from the
     // display component.
-    \Drupal::service('module_installer')->uninstall(array('field_third_party_test'));
+    \Drupal::service('module_installer')->uninstall(['field_third_party_test']);
 
     // Ensure the button is still there after the module has been disabled.
     $this->drupalGet($manage_display);
@@ -206,7 +206,7 @@ function testFormatterUI() {
     $this->assertFieldByName('field_test_settings_edit');
 
     // Ensure that third-party form elements are not present anymore.
-    $this->drupalPostAjaxForm(NULL, array(), 'field_test_settings_edit');
+    $this->drupalPostAjaxForm(NULL, [], 'field_test_settings_edit');
     $fieldname = 'fields[field_test][settings_edit_form][third_party_settings][field_third_party_test][field_test_field_formatter_third_party_settings_form]';
     $this->assertNoField($fieldname);
 
@@ -245,23 +245,23 @@ public function testWidgetUI() {
     $this->assertText("$setting_name: $setting_value", 'The expected summary is displayed.');
 
     // Check whether widget weights are respected.
-    $result = $this->xpath('//select[@id=:id]/option', array(':id' => 'edit-fields-field-test-type'));
+    $result = $this->xpath('//select[@id=:id]/option', [':id' => 'edit-fields-field-test-type']);
     $options = array_map(function($item) {
       return (string) $item->attributes()->value[0];
     }, $result);
-    $expected_options = array (
+    $expected_options =  [
       'test_field_widget',
       'test_field_widget_multiple',
-    );
+    ];
     $this->assertEqual($options, $expected_options, 'The expected widget ordering is respected.');
 
     // Change the widget and check that the summary is updated.
-    $edit = array(
+    $edit = [
       'fields[field_test][type]' => 'test_field_widget_multiple',
       'fields[field_test][region]' => 'content',
       'refresh_rows' => 'field_test',
-    );
-    $this->drupalPostAjaxForm(NULL, $edit, array('op' => t('Refresh')));
+    ];
+    $this->drupalPostAjaxForm(NULL, $edit, ['op' => t('Refresh')]);
     $widget_type = 'test_field_widget_multiple';
     $default_settings = \Drupal::service('plugin.manager.field.widget')->getDefaultSettings($widget_type);
     $setting_name = key($default_settings);
@@ -270,7 +270,7 @@ public function testWidgetUI() {
     $this->assertText("$setting_name: $setting_value", 'The expected summary is displayed.');
 
     // Submit the form and check that the display is updated.
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $display = entity_get_form_display('node', $this->type, 'default');
     $display_options = $display->getComponent('field_test');
     $current_widget = $display_options['type'];
@@ -282,26 +282,26 @@ public function testWidgetUI() {
     $this->assertText('field_test_field_widget_settings_summary_alter');
 
     // Click on the widget settings button to open the widget settings form.
-    $this->drupalPostAjaxForm(NULL, array(), "field_test_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "field_test_settings_edit");
 
     // Assert that the field added in
     // field_test_field_widget_third_party_settings_form() is present.
     $fieldname = 'fields[field_test][settings_edit_form][third_party_settings][field_third_party_test][field_test_widget_third_party_settings_form]';
     $this->assertField($fieldname, 'The field added in hook_field_widget_third_party_settings_form() is present on the settings form.');
-    $edit = array($fieldname => 'foo');
+    $edit = [$fieldname => 'foo'];
     $this->drupalPostAjaxForm(NULL, $edit, "field_test_plugin_settings_update");
 
     // Save the form to save the third party settings.
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     \Drupal::entityManager()->clearCachedFieldDefinitions();
     $storage = $this->container->get('entity_type.manager')->getStorage('entity_form_display');
-    $storage->resetCache(array('node.' . $this->type . '.default'));
+    $storage->resetCache(['node.' . $this->type . '.default']);
     $display = $storage->load('node.' . $this->type . '.default');
     $this->assertEqual($display->getRenderer('field_test')->getThirdPartySetting('field_third_party_test', 'field_test_widget_third_party_settings_form'), 'foo');
     $this->assertTrue(in_array('field_third_party_test', $display->calculateDependencies()->getDependencies()['module']), 'Form display does not have a dependency on field_third_party_test module.');
 
     // Confirm that the third party settings are not updated on the settings form.
-    $this->drupalPostAjaxForm(NULL, array(), "field_test_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "field_test_settings_edit");
     $this->assertFieldByName($fieldname, '');
 
     // Creates a new field that can not be used with the multiple formatter.
@@ -312,8 +312,8 @@ public function testWidgetUI() {
     $this->drupalGet($manage_display);
 
     // Checks if the select elements contain the specified options.
-    $this->assertFieldSelectOptions('fields[field_test][type]', array('test_field_widget', 'test_field_widget_multiple'));
-    $this->assertFieldSelectOptions('fields[field_onewidgetfield][type]', array('test_field_widget'));
+    $this->assertFieldSelectOptions('fields[field_test][type]', ['test_field_widget', 'test_field_widget_multiple']);
+    $this->assertFieldSelectOptions('fields[field_onewidgetfield][type]', ['test_field_widget']);
 
     // Ensure that fields can be hidden directly by changing the region.
     $this->assertFieldByName('fields[field_test][region]', 'content');
@@ -335,20 +335,20 @@ function testViewModeCustom() {
     // to appear in a rendered node other than as part of the field being tested
     // (for example, unlikely to be part of the "Submitted by ... on ..." line).
     $value = 12345;
-    $settings = array(
+    $settings = [
       'type' => $this->type,
-      'field_test' => array(array('value' => $value)),
-    );
+      'field_test' => [['value' => $value]],
+    ];
     $node = $this->drupalCreateNode($settings);
 
     // Gather expected output values with the various formatters.
     $formatter_plugin_manager = \Drupal::service('plugin.manager.field.formatter');
     $field_test_default_settings = $formatter_plugin_manager->getDefaultSettings('field_test_default');
     $field_test_with_prepare_view_settings = $formatter_plugin_manager->getDefaultSettings('field_test_with_prepare_view');
-    $output = array(
+    $output = [
       'field_test_default' => $field_test_default_settings['test_formatter_setting'] . '|' . $value,
       'field_test_with_prepare_view' => $field_test_with_prepare_view_settings['test_formatter_setting_additional'] . '|' . $value . '|' . ($value + 1),
-    );
+    ];
 
     // Check that the field is displayed with the default formatter in 'rss'
     // mode (uses 'default'), and hidden in 'teaser' mode (uses custom settings).
@@ -357,40 +357,40 @@ function testViewModeCustom() {
 
     // Change formatter for 'default' mode, check that the field is displayed
     // accordingly in 'rss' mode.
-    $edit = array(
+    $edit = [
       'fields[field_test][type]' => 'field_test_with_prepare_view',
       'fields[field_test][region]' => 'content',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/' . $this->type . '/display', $edit, t('Save'));
     $this->assertNodeViewText($node, 'rss', $output['field_test_with_prepare_view'], "The field is displayed as expected in view modes that use 'default' settings.");
 
     // Specialize the 'rss' mode, check that the field is displayed the same.
-    $edit = array(
+    $edit = [
       "display_modes_custom[rss]" => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/' . $this->type . '/display', $edit, t('Save'));
     $this->assertNodeViewText($node, 'rss', $output['field_test_with_prepare_view'], "The field is displayed as expected in newly specialized 'rss' mode.");
 
     // Set the field to 'hidden' in the view mode, check that the field is
     // hidden.
-    $edit = array(
+    $edit = [
       'fields[field_test][region]' => 'hidden',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/' . $this->type . '/display/rss', $edit, t('Save'));
     $this->assertNodeViewNoText($node, 'rss', $value, "The field is hidden in 'rss' mode.");
 
     // Set the view mode back to 'default', check that the field is displayed
     // accordingly.
-    $edit = array(
+    $edit = [
       "display_modes_custom[rss]" => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/' . $this->type . '/display', $edit, t('Save'));
     $this->assertNodeViewText($node, 'rss', $output['field_test_with_prepare_view'], "The field is displayed as expected when 'rss' mode is set back to 'default' settings.");
 
     // Specialize the view mode again.
-    $edit = array(
+    $edit = [
       "display_modes_custom[rss]" => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/' . $this->type . '/display', $edit, t('Save'));
     // Check that the previous settings for the view mode have been kept.
     $this->assertNodeViewNoText($node, 'rss', $value, "The previous settings are kept when 'rss' mode is specialized again.");
@@ -428,7 +428,7 @@ function testSingleViewMode() {
     $this->assertNoText('Use custom display settings for the following view modes', 'Custom display settings fieldset found.');
 
     // This may not trigger a notice when 'view_modes_custom' isn't available.
-    $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary . '/overview/display', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary . '/overview/display', [], t('Save'));
   }
 
   /**
@@ -436,13 +436,13 @@ function testSingleViewMode() {
    */
   function testNoFieldsDisplayOverview() {
     // Create a fresh content type without any fields.
-    NodeType::create(array(
+    NodeType::create([
       'type' => 'no_fields',
       'name' => 'No fields',
-    ))->save();
+    ])->save();
 
     $this->drupalGet('admin/structure/types/manage/no_fields/display');
-    $this->assertRaw(t('There are no fields yet added. You can add new fields on the <a href=":link">Manage fields</a> page.', array(':link' => \Drupal::url('entity.node.field_ui_fields', array('node_type' => 'no_fields')))));
+    $this->assertRaw(t('There are no fields yet added. You can add new fields on the <a href=":link">Manage fields</a> page.', [':link' => \Drupal::url('entity.node.field_ui_fields', ['node_type' => 'no_fields'])]));
   }
 
   /**
@@ -514,7 +514,7 @@ function assertNodeViewTextHelper(EntityInterface $node, $view_mode, $text, $mes
     $clone = clone $node;
     $element = node_view($clone, $view_mode);
     $output = \Drupal::service('renderer')->renderRoot($element);
-    $this->verbose(t('Rendered node - view mode: @view_mode', array('@view_mode' => $view_mode)) . '<hr />' . $output);
+    $this->verbose(t('Rendered node - view mode: @view_mode', ['@view_mode' => $view_mode]) . '<hr />' . $output);
 
     // Assign content so that WebTestBase functions can be used.
     $this->setRawContent($output);
@@ -539,7 +539,7 @@ function assertNodeViewTextHelper(EntityInterface $node, $view_mode, $text, $mes
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertFieldSelectOptions($name, array $expected_options) {
-    $xpath = $this->buildXPathQuery('//select[@name=:name]', array(':name' => $name));
+    $xpath = $this->buildXPathQuery('//select[@name=:name]', [':name' => $name]);
     $fields = $this->xpath($xpath);
     if ($fields) {
       $field = $fields[0];
@@ -565,7 +565,7 @@ protected function assertFieldSelectOptions($name, array $expected_options) {
    *   An array of option values as strings.
    */
   protected function getAllOptionsList(\SimpleXMLElement $element) {
-    $options = array();
+    $options = [];
     // Add all options items.
     foreach ($element->option as $option) {
       $options[] = (string) $option['value'];
diff --git a/core/modules/field_ui/src/Tests/ManageFieldsTest.php b/core/modules/field_ui/src/Tests/ManageFieldsTest.php
index cbe9f53e9f55a6cb5a0fb7e0be2c1df2abbde6e6..6be13664e316b7efe5de651731b822b3596fc5d4 100644
--- a/core/modules/field_ui/src/Tests/ManageFieldsTest.php
+++ b/core/modules/field_ui/src/Tests/ManageFieldsTest.php
@@ -26,7 +26,7 @@ class ManageFieldsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_ui', 'field_test', 'taxonomy', 'image', 'block');
+  public static $modules = ['node', 'field_ui', 'field_test', 'taxonomy', 'image', 'block'];
 
   /**
    * The ID of the custom content type created for testing.
@@ -68,12 +68,12 @@ protected function setUp() {
     $this->drupalPlaceBlock('page_title_block');
 
     // Create a test user.
-    $admin_user = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer taxonomy', 'administer taxonomy_term fields', 'administer taxonomy_term display', 'administer users', 'administer account settings', 'administer user display', 'bypass node access'));
+    $admin_user = $this->drupalCreateUser(['access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer taxonomy', 'administer taxonomy_term fields', 'administer taxonomy_term display', 'administer users', 'administer account settings', 'administer user display', 'bypass node access']);
     $this->drupalLogin($admin_user);
 
     // Create content type, with underscores.
     $type_name = strtolower($this->randomMachineName(8)) . '_test';
-    $type = $this->drupalCreateContentType(array('name' => $type_name, 'type' => $type_name));
+    $type = $this->drupalCreateContentType(['name' => $type_name, 'type' => $type_name]);
     $this->contentType = $type->id();
 
     // Create random field name with markup to test escaping.
@@ -82,22 +82,22 @@ protected function setUp() {
     $this->fieldName = 'field_' . $this->fieldNameInput;
 
     // Create Basic page and Article node types.
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
 
     // Create a vocabulary named "Tags".
-    $vocabulary = Vocabulary::create(array(
+    $vocabulary = Vocabulary::create([
       'name' => 'Tags',
       'vid' => 'tags',
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
     $vocabulary->save();
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $vocabulary->id() => $vocabulary->id(),
-      ),
-    );
+      ],
+    ];
     $this->createEntityReferenceField('node', 'article', 'field_' . $vocabulary->id(), 'Tags', 'taxonomy_term', 'default', $handler_settings);
 
     entity_get_form_display('node', 'article', 'default')
@@ -132,15 +132,15 @@ function manageFieldsPage($type = '') {
     $type = empty($type) ? $this->contentType : $type;
     $this->drupalGet('admin/structure/types/manage/' . $type . '/fields');
     // Check all table columns.
-    $table_headers = array(
+    $table_headers = [
       t('Label'),
       t('Machine name'),
       t('Field type'),
       t('Operations'),
-    );
+    ];
     foreach ($table_headers as $table_header) {
       // We check that the label appear in the table headings.
-      $this->assertRaw($table_header . '</th>', format_string('%table_header table header was found.', array('%table_header' => $table_header)));
+      $this->assertRaw($table_header . '</th>', format_string('%table_header table header was found.', ['%table_header' => $table_header]));
     }
 
     // Test the "Add field" action link.
@@ -194,16 +194,16 @@ function updateField() {
 
     // Populate the field settings with new settings.
     $string = 'updated dummy test string';
-    $edit = array(
+    $edit = [
       'settings[test_field_storage_setting]' => $string,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save field settings'));
 
     // Go to the field edit page.
     $this->drupalGet('admin/structure/types/manage/' . $this->contentType . '/fields/' . $field_id);
-    $edit = array(
+    $edit = [
       'settings[test_field_setting]' => $string,
-    );
+    ];
     $this->assertText(t('Default value'), 'Default value heading is shown');
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
 
@@ -226,7 +226,7 @@ function addExistingField() {
     // do not show up in the "Re-use existing field" list.
     $this->assertFalse($this->xpath('//select[@id="edit-existing-storage-name"]//option[@value="comment"]'), 'The list of options respects entity type restrictions.');
     // Validate the FALSE assertion above by also testing a valid one.
-    $this->assertTrue($this->xpath('//select[@id="edit-existing-storage-name"]//option[@value=:field_name]', array(':field_name' => $this->fieldName)), 'The list of options shows a valid option.');
+    $this->assertTrue($this->xpath('//select[@id="edit-existing-storage-name"]//option[@value=:field_name]', [':field_name' => $this->fieldName]), 'The list of options shows a valid option.');
 
     // Add a new field based on an existing field.
     $this->fieldUIAddExistingField("admin/structure/types/manage/page", $this->fieldName, $this->fieldLabel . '_2');
@@ -243,18 +243,18 @@ function cardinalitySettings() {
 
     // Assert the cardinality other field cannot be empty when cardinality is
     // set to 'number'.
-    $edit = array(
+    $edit = [
       'cardinality' => 'number',
       'cardinality_number' => '',
-    );
+    ];
     $this->drupalPostForm($field_edit_path, $edit, t('Save field settings'));
     $this->assertText('Number of values is required.');
 
     // Submit a custom number.
-    $edit = array(
+    $edit = [
       'cardinality' => 'number',
       'cardinality_number' => 6,
-    );
+    ];
     $this->drupalPostForm($field_edit_path, $edit, t('Save field settings'));
     $this->assertText('Updated field Body field settings.');
     $this->drupalGet($field_edit_path);
@@ -285,9 +285,9 @@ function cardinalitySettings() {
     $this->drupalPostForm('node/add/article', $edit, 'Save');
 
     // Set to unlimited.
-    $edit = array(
+    $edit = [
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    );
+    ];
     $this->drupalPostForm($field_edit_path, $edit, t('Save field settings'));
     $this->assertText('Updated field Body field settings.');
     $this->drupalGet($field_edit_path);
@@ -340,7 +340,7 @@ protected function addPersistentFieldStorage() {
       // Delete all the body field instances.
       $this->drupalGet('admin/structure/types/manage/' . $node_type . '/fields/node.' . $node_type . '.' . $this->fieldName);
       $this->clickLink(t('Delete'));
-      $this->drupalPostForm(NULL, array(), t('Delete'));
+      $this->drupalPostForm(NULL, [], t('Delete'));
     }
     // Check "Re-use existing field" appears.
     $this->drupalGet('admin/structure/types/manage/page/fields/add-field');
@@ -387,17 +387,17 @@ function testFieldPrefix() {
     $field_exceed_max_length_input = $this->randomMachineName(23);
 
     // Try to create the field.
-    $edit = array(
+    $edit = [
       'label' => $field_exceed_max_length_label,
       'field_name' => $field_exceed_max_length_input,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/' . $this->contentType . '/fields/add-field', $edit, t('Save and continue'));
     $this->assertText('Machine-readable name cannot be longer than 22 characters but is currently 23 characters long.');
 
     // Create a valid field.
     $this->fieldUIAddNewField('admin/structure/types/manage/' . $this->contentType, $this->fieldNameInput, $this->fieldLabel);
     $this->drupalGet('admin/structure/types/manage/' . $this->contentType . '/fields/node.' . $this->contentType . '.' . $field_prefix . $this->fieldNameInput);
-    $this->assertText(format_string('@label settings for @type', array('@label' => $this->fieldLabel, '@type' => $this->contentType)));
+    $this->assertText(format_string('@label settings for @type', ['@label' => $this->fieldLabel, '@type' => $this->contentType]));
   }
 
   /**
@@ -406,16 +406,16 @@ function testFieldPrefix() {
   function testDefaultValue() {
     // Create a test field storage and field.
     $field_name = 'test';
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'type' => 'test_field'
-    ))->save();
-    $field = FieldConfig::create(array(
+    ])->save();
+    $field = FieldConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'bundle' => $this->contentType,
-    ));
+    ]);
     $field->save();
 
     entity_get_form_display('node', $this->contentType, 'default')
@@ -429,23 +429,23 @@ function testDefaultValue() {
     $this->assertFieldById($element_id, '', 'The default value widget was empty.');
 
     // Check that invalid default values are rejected.
-    $edit = array($element_name => '-1');
+    $edit = [$element_name => '-1'];
     $this->drupalPostForm($admin_path, $edit, t('Save settings'));
     $this->assertText("$field_name does not accept the value -1", 'Form validation failed.');
 
     // Check that the default value is saved.
-    $edit = array($element_name => '1');
+    $edit = [$element_name => '1'];
     $this->drupalPostForm($admin_path, $edit, t('Save settings'));
     $this->assertText("Saved $field_name configuration", 'The form was successfully submitted.');
     $field = FieldConfig::loadByName('node', $this->contentType, $field_name);
-    $this->assertEqual($field->getDefaultValueLiteral(), array(array('value' => 1)), 'The default value was correctly saved.');
+    $this->assertEqual($field->getDefaultValueLiteral(), [['value' => 1]], 'The default value was correctly saved.');
 
     // Check that the default value shows up in the form
     $this->drupalGet($admin_path);
     $this->assertFieldById($element_id, '1', 'The default value widget was displayed with the correct value.');
 
     // Check that the default value can be emptied.
-    $edit = array($element_name => '');
+    $edit = [$element_name => ''];
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
     $this->assertText("Saved $field_name configuration", 'The form was successfully submitted.');
     $field = FieldConfig::loadByName('node', $this->contentType, $field_name);
@@ -458,13 +458,13 @@ function testDefaultValue() {
     $field_storage->save();
 
     $this->drupalGet($admin_path);
-    $edit = array(
+    $edit = [
       'required' => 1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
 
     $this->drupalGet($admin_path);
-    $this->drupalPostForm(NULL, array(), t('Save settings'));
+    $this->drupalPostForm(NULL, [], t('Save settings'));
     $this->assertText("Saved $field_name configuration", 'The form was successfully submitted.');
     $field = FieldConfig::loadByName('node', $this->contentType, $field_name);
     $this->assertEqual($field->getDefaultValueLiteral(), NULL, 'The default value was correctly saved.');
@@ -486,7 +486,7 @@ function testDeleteField() {
 
     // Create an additional node type.
     $type_name2 = strtolower($this->randomMachineName(8)) . '_test';
-    $type2 = $this->drupalCreateContentType(array('name' => $type_name2, 'type' => $type_name2));
+    $type2 = $this->drupalCreateContentType(['name' => $type_name2, 'type' => $type_name2]);
     $type_name2 = $type2->id();
 
     // Add a field to the second node type.
@@ -518,10 +518,10 @@ function testDisallowedFieldNames() {
     $this->config('field_ui.settings')->set('field_prefix', '')->save();
 
     $label = 'Disallowed field';
-    $edit = array(
+    $edit = [
       'label' => $label,
       'new_storage_type' => 'test_field',
-    );
+    ];
 
     // Try with an entity key.
     $edit['field_name'] = 'title';
@@ -543,31 +543,31 @@ function testLockedField() {
     // Create a locked field and attach it to a bundle. We need to do this
     // programmatically as there's no way to create a locked field through UI.
     $field_name = strtolower($this->randomMachineName(8));
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'type' => 'test_field',
       'cardinality' => 1,
       'locked' => TRUE
-    ));
+    ]);
     $field_storage->save();
-    FieldConfig::create(array(
+    FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => $this->contentType,
-    ))->save();
+    ])->save();
     entity_get_form_display('node', $this->contentType, 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'test_field_widget',
-      ))
+      ])
       ->save();
 
     // Check that the links for edit and delete are not present.
     $this->drupalGet('admin/structure/types/manage/' . $this->contentType . '/fields');
-    $locked = $this->xpath('//tr[@id=:field_name]/td[4]', array(':field_name' => $field_name));
+    $locked = $this->xpath('//tr[@id=:field_name]/td[4]', [':field_name' => $field_name]);
     $this->assertTrue(in_array('Locked', $locked), 'Field is marked as Locked in the UI');
-    $edit_link = $this->xpath('//tr[@id=:field_name]/td[4]', array(':field_name' => $field_name));
+    $edit_link = $this->xpath('//tr[@id=:field_name]/td[4]', [':field_name' => $field_name]);
     $this->assertFalse(in_array('edit', $edit_link), 'Edit option for locked field is not present the UI');
-    $delete_link = $this->xpath('//tr[@id=:field_name]/td[4]', array(':field_name' => $field_name));
+    $delete_link = $this->xpath('//tr[@id=:field_name]/td[4]', [':field_name' => $field_name]);
     $this->assertFalse(in_array('delete', $delete_link), 'Delete option for locked field is not present the UI');
     $this->drupalGet('admin/structure/types/manage/' . $this->contentType . '/fields/node.' . $this->contentType . '.' . $field_name . '/delete');
     $this->assertResponse(403);
@@ -584,22 +584,22 @@ function testHiddenFields() {
 
     // Create a field storage and a field programmatically.
     $field_name = 'hidden_test_field';
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'type' => $field_name,
-    ))->save();
-    $field = array(
+    ])->save();
+    $field = [
       'field_name' => $field_name,
       'bundle' => $this->contentType,
       'entity_type' => 'node',
       'label' => t('Hidden field'),
-    );
+    ];
     FieldConfig::create($field)->save();
     entity_get_form_display('node', $this->contentType, 'default')
       ->setComponent($field_name)
       ->save();
-    $this->assertTrue(FieldConfig::load('node.' . $this->contentType . '.' . $field_name), format_string('A field of the field storage %field was created programmatically.', array('%field' => $field_name)));
+    $this->assertTrue(FieldConfig::load('node.' . $this->contentType . '.' . $field_name), format_string('A field of the field storage %field was created programmatically.', ['%field' => $field_name]));
 
     // Check that the newly added field appears on the 'Manage Fields'
     // screen.
@@ -609,17 +609,17 @@ function testHiddenFields() {
     // Check that the field does not appear in the 're-use existing field' row
     // on other bundles.
     $this->drupalGet('admin/structure/types/manage/page/fields/add-field');
-    $this->assertFalse($this->xpath('//select[@id="edit-existing-storage-name"]//option[@value=:field_name]', array(':field_name' => $field_name)), "The 're-use existing field' select respects field types 'no_ui' property.");
-    $this->assertTrue($this->xpath('//select[@id="edit-existing-storage-name"]//option[@value=:field_name]', array(':field_name' => 'field_tags')), "The 're-use existing field' select shows a valid option.");
+    $this->assertFalse($this->xpath('//select[@id="edit-existing-storage-name"]//option[@value=:field_name]', [':field_name' => $field_name]), "The 're-use existing field' select respects field types 'no_ui' property.");
+    $this->assertTrue($this->xpath('//select[@id="edit-existing-storage-name"]//option[@value=:field_name]', [':field_name' => 'field_tags']), "The 're-use existing field' select shows a valid option.");
 
     // Check that non-configurable fields are not available.
     $field_types = \Drupal::service('plugin.manager.field.field_type')->getDefinitions();
     foreach ($field_types as $field_type => $definition) {
       if (empty($definition['no_ui'])) {
-        $this->assertTrue($this->xpath('//select[@id="edit-new-storage-type"]//option[@value=:field_type]', array(':field_type' => $field_type)), SafeMarkup::format('Configurable field type @field_type is available.', array('@field_type' => $field_type)));
+        $this->assertTrue($this->xpath('//select[@id="edit-new-storage-type"]//option[@value=:field_type]', [':field_type' => $field_type]), SafeMarkup::format('Configurable field type @field_type is available.', ['@field_type' => $field_type]));
       }
       else {
-        $this->assertFalse($this->xpath('//select[@id="edit-new-storage-type"]//option[@value=:field_type]', array(':field_type' => $field_type)), SafeMarkup::format('Non-configurable field type @field_type is not available.', array('@field_type' => $field_type)));
+        $this->assertFalse($this->xpath('//select[@id="edit-new-storage-type"]//option[@value=:field_type]', [':field_type' => $field_type]), SafeMarkup::format('Non-configurable field type @field_type is not available.', ['@field_type' => $field_type]));
       }
     }
   }
@@ -630,16 +630,16 @@ function testHiddenFields() {
   function testDuplicateFieldName() {
     // field_tags already exists, so we're expecting an error when trying to
     // create a new field with the same name.
-    $edit = array(
+    $edit = [
       'field_name' => 'tags',
       'label' => $this->randomMachineName(),
       'new_storage_type' => 'entity_reference',
-    );
+    ];
     $url = 'admin/structure/types/manage/' . $this->contentType . '/fields/add-field';
     $this->drupalPostForm($url, $edit, t('Save and continue'));
 
     $this->assertText(t('The machine-readable name is already in use. It must be unique.'));
-    $this->assertUrl($url, array(), 'Stayed on the same page.');
+    $this->assertUrl($url, [], 'Stayed on the same page.');
   }
 
   /**
@@ -679,24 +679,24 @@ function testDeleteTaxonomyField() {
    */
   function testHelpDescriptions() {
     // Create an image field
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_image',
       'entity_type' => 'node',
       'type' => 'image',
-    ))->save();
+    ])->save();
 
-    FieldConfig::create(array(
+    FieldConfig::create([
       'field_name' => 'field_image',
       'entity_type' => 'node',
       'label' => 'Image',
       'bundle' => 'article',
-    ))->save();
+    ])->save();
 
     entity_get_form_display('node', 'article', 'default')->setComponent('field_image')->save();
 
-    $edit = array(
+    $edit = [
       'description' => '<strong>Test with an upload field.',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.field_image', $edit, t('Save settings'));
 
     // Check that hook_field_widget_form_alter() does believe this is the
@@ -704,9 +704,9 @@ function testHelpDescriptions() {
     $this->drupalGet('admin/structure/types/manage/article/fields/node.article.field_tags');
     $this->assertText('From hook_field_widget_form_alter(): Default form is true.', 'Default value form in hook_field_widget_form_alter().');
 
-    $edit = array(
+    $edit = [
       'description' => '<em>Test with a non upload field.',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.field_tags', $edit, t('Save settings'));
 
     $this->drupalGet('node/add/article');
diff --git a/core/modules/field_ui/tests/modules/field_ui_test/field_ui_test.module b/core/modules/field_ui/tests/modules/field_ui_test/field_ui_test.module
index 5fb232b7c53079e00caef64a35f01d70bddf9ca2..95234f1baab2b5a2899f1f7db58d3054a60065cd 100644
--- a/core/modules/field_ui/tests/modules/field_ui_test/field_ui_test.module
+++ b/core/modules/field_ui/tests/modules/field_ui_test/field_ui_test.module
@@ -15,41 +15,41 @@ function field_ui_test_form_entity_view_display_edit_form_alter(&$form, FormStat
   $table = &$form['fields'];
 
   foreach (Element::children($table) as $name) {
-    $table[$name]['parent_wrapper']['parent']['#options'] = array('indent' => 'Indent');
+    $table[$name]['parent_wrapper']['parent']['#options'] = ['indent' => 'Indent'];
     $table[$name]['parent_wrapper']['parent']['#default_value'] = 'indent';
   }
 
   $table['indent'] = [
-    '#attributes' => array('class' => array('draggable', 'field-group'), 'id' => 'indent-id'),
+    '#attributes' => ['class' => ['draggable', 'field-group'], 'id' => 'indent-id'],
     '#row_type' => 'group',
     '#region_callback' => 'field_ui_test_region_callback',
-    '#js_settings' => array('rowHandler' => 'group'),
-    'human_name' => array(
+    '#js_settings' => ['rowHandler' => 'group'],
+    'human_name' => [
       '#markup' => 'Indent',
       '#prefix' => '<span class="group-label">',
       '#suffix' => '</span>',
-    ),
-    'weight' => array(
+    ],
+    'weight' => [
       '#type' => 'textfield',
       '#default_value' => 0,
       '#size' => 3,
-      '#attributes' => array('class' => array('field-weight')),
-    ),
-    'parent_wrapper' => array(
-      'parent' => array(
+      '#attributes' => ['class' => ['field-weight']],
+    ],
+    'parent_wrapper' => [
+      'parent' => [
         '#type' => 'select',
-        '#options' => array('indent' => 'Indent'),
+        '#options' => ['indent' => 'Indent'],
         '#empty_value' => '',
         '#default_value' => '',
-        '#attributes' => array('class' => array('field-parent')),
-        '#parents' => array('fields', 'indent', 'parent'),
-      ),
-      'hidden_name' => array(
+        '#attributes' => ['class' => ['field-parent']],
+        '#parents' => ['fields', 'indent', 'parent'],
+      ],
+      'hidden_name' => [
         '#type' => 'hidden',
         '#default_value' => 'indent',
-        '#attributes' => array('class' => array('field-name')),
-      ),
-    ),
+        '#attributes' => ['class' => ['field-name']],
+      ],
+    ],
   ];
 
 }
diff --git a/core/modules/field_ui/tests/src/Functional/EntityDisplayModeTest.php b/core/modules/field_ui/tests/src/Functional/EntityDisplayModeTest.php
index 1d2cab0549d5f45f35a88b5959ba3c6849123f88..3bb0b139d7bcb1f01293ac1f4c06ab58cf5bfbae 100644
--- a/core/modules/field_ui/tests/src/Functional/EntityDisplayModeTest.php
+++ b/core/modules/field_ui/tests/src/Functional/EntityDisplayModeTest.php
@@ -35,7 +35,7 @@ public function testEntityViewModeUI() {
     // Test the listing page.
     $this->drupalGet('admin/structure/display-modes/view');
     $this->assertResponse(403);
-    $this->drupalLogin($this->drupalCreateUser(array('administer display modes')));
+    $this->drupalLogin($this->drupalCreateUser(['administer display modes']));
     $this->drupalGet('admin/structure/display-modes/view');
     $this->assertResponse(200);
     $this->assertText(t('Add view mode'));
@@ -50,29 +50,29 @@ public function testEntityViewModeUI() {
 
     // Test adding a view mode including dots in machine_name.
     $this->clickLink(t('Test entity'));
-    $edit = array(
+    $edit = [
       'id' => strtolower($this->randomMachineName()) . '.' . strtolower($this->randomMachineName()),
       'label' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertRaw('The machine-readable name must contain only lowercase letters, numbers, and underscores.');
 
     // Test adding a view mode.
-    $edit = array(
+    $edit = [
       'id' => strtolower($this->randomMachineName()),
       'label' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('Saved the %label view mode.', array('%label' => $edit['label'])));
+    $this->assertRaw(t('Saved the %label view mode.', ['%label' => $edit['label']]));
 
     // Test editing the view mode.
     $this->drupalGet('admin/structure/display-modes/view/manage/entity_test.' . $edit['id']);
 
     // Test deleting the view mode.
     $this->clickLink(t('Delete'));
-    $this->assertRaw(t('Are you sure you want to delete the view mode %label?', array('%label' => $edit['label'])));
+    $this->assertRaw(t('Are you sure you want to delete the view mode %label?', ['%label' => $edit['label']]));
     $this->drupalPostForm(NULL, NULL, t('Delete'));
-    $this->assertRaw(t('The view mode %label has been deleted.', array('%label' => $edit['label'])));
+    $this->assertRaw(t('The view mode %label has been deleted.', ['%label' => $edit['label']]));
   }
 
   /**
@@ -82,7 +82,7 @@ public function testEntityFormModeUI() {
     // Test the listing page.
     $this->drupalGet('admin/structure/display-modes/form');
     $this->assertResponse(403);
-    $this->drupalLogin($this->drupalCreateUser(array('administer display modes')));
+    $this->drupalLogin($this->drupalCreateUser(['administer display modes']));
     $this->drupalGet('admin/structure/display-modes/form');
     $this->assertResponse(200);
     $this->assertText(t('Add form mode'));
@@ -96,29 +96,29 @@ public function testEntityFormModeUI() {
 
     // Test adding a view mode including dots in machine_name.
     $this->clickLink(t('Test entity'));
-    $edit = array(
+    $edit = [
       'id' => strtolower($this->randomMachineName()) . '.' . strtolower($this->randomMachineName()),
       'label' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertRaw('The machine-readable name must contain only lowercase letters, numbers, and underscores.');
 
     // Test adding a form mode.
-    $edit = array(
+    $edit = [
       'id' => strtolower($this->randomMachineName()),
       'label' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('Saved the %label form mode.', array('%label' => $edit['label'])));
+    $this->assertRaw(t('Saved the %label form mode.', ['%label' => $edit['label']]));
 
     // Test editing the form mode.
     $this->drupalGet('admin/structure/display-modes/form/manage/entity_test.' . $edit['id']);
 
     // Test deleting the form mode.
     $this->clickLink(t('Delete'));
-    $this->assertRaw(t('Are you sure you want to delete the form mode %label?', array('%label' => $edit['label'])));
+    $this->assertRaw(t('Are you sure you want to delete the form mode %label?', ['%label' => $edit['label']]));
     $this->drupalPostForm(NULL, NULL, t('Delete'));
-    $this->assertRaw(t('The form mode %label has been deleted.', array('%label' => $edit['label'])));
+    $this->assertRaw(t('The form mode %label has been deleted.', ['%label' => $edit['label']]));
   }
 
 }
diff --git a/core/modules/field_ui/tests/src/Functional/FieldUIIndentationTest.php b/core/modules/field_ui/tests/src/Functional/FieldUIIndentationTest.php
index 528f2c4d80cc9861020e6258f860ef922de0e2ea..3eb90d04d5f831c481922fd7ecb8260ffacc0dba 100644
--- a/core/modules/field_ui/tests/src/Functional/FieldUIIndentationTest.php
+++ b/core/modules/field_ui/tests/src/Functional/FieldUIIndentationTest.php
@@ -16,7 +16,7 @@ class FieldUIIndentationTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_ui', 'field_ui_test');
+  public static $modules = ['node', 'field_ui', 'field_ui_test'];
 
   /**
    * {@inheritdoc}
@@ -25,11 +25,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create a test user.
-    $admin_user = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node display'));
+    $admin_user = $this->drupalCreateUser(['access content', 'administer content types', 'administer node display']);
     $this->drupalLogin($admin_user);
 
     // Create Basic page node type.
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
   }
 
diff --git a/core/modules/field_ui/tests/src/Functional/FieldUIRouteTest.php b/core/modules/field_ui/tests/src/Functional/FieldUIRouteTest.php
index 1e954e5dfa3ef9d7efcf2a4a0665ef6fbf0f8f09..fe7a27011cac469396ec919144451e19932759d9 100644
--- a/core/modules/field_ui/tests/src/Functional/FieldUIRouteTest.php
+++ b/core/modules/field_ui/tests/src/Functional/FieldUIRouteTest.php
@@ -49,7 +49,7 @@ public function testFieldUIRoutes() {
     $this->assertTitle('Manage display | Drupal');
     $this->assertLocalTasks();
 
-    $edit = array('display_modes_custom[compact]' => TRUE);
+    $edit = ['display_modes_custom[compact]' => TRUE];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->drupalGet('admin/config/people/accounts/display/compact');
     $this->assertTitle('Manage display | Drupal');
@@ -63,37 +63,37 @@ public function testFieldUIRoutes() {
     $this->assertTitle('Manage form display | Drupal');
     $this->assertLocalTasks();
 
-    $edit = array('display_modes_custom[register]' => TRUE);
+    $edit = ['display_modes_custom[register]' => TRUE];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertResponse(200);
     $this->drupalGet('admin/config/people/accounts/form-display/register');
     $this->assertTitle('Manage form display | Drupal');
     $this->assertLocalTasks();
-    $this->assert(count($this->xpath('//ul/li[1]/a[contains(text(), :text)]', array(':text' => 'Default'))) == 1, 'Default secondary tab is in first position.');
+    $this->assert(count($this->xpath('//ul/li[1]/a[contains(text(), :text)]', [':text' => 'Default'])) == 1, 'Default secondary tab is in first position.');
 
     // Create new view mode and verify it's available on the Manage Display
     // screen after enabling it.
-    EntityViewMode::create(array(
+    EntityViewMode::create([
       'id' => 'user.test',
       'label' => 'Test',
       'targetEntityType' => 'user',
-    ))->save();
+    ])->save();
     $this->container->get('router.builder')->rebuildIfNeeded();
 
-    $edit = array('display_modes_custom[test]' => TRUE);
+    $edit = ['display_modes_custom[test]' => TRUE];
     $this->drupalPostForm('admin/config/people/accounts/display', $edit, t('Save'));
     $this->assertLink('Test');
 
     // Create new form mode and verify it's available on the Manage Form
     // Display screen after enabling it.
-    EntityFormMode::create(array(
+    EntityFormMode::create([
       'id' => 'user.test',
       'label' => 'Test',
       'targetEntityType' => 'user',
-    ))->save();
+    ])->save();
     $this->container->get('router.builder')->rebuildIfNeeded();
 
-    $edit = array('display_modes_custom[test]' => TRUE);
+    $edit = ['display_modes_custom[test]' => TRUE];
     $this->drupalPostForm('admin/config/people/accounts/form-display', $edit, t('Save'));
     $this->assertLink('Test');
   }
diff --git a/core/modules/field_ui/tests/src/Kernel/EntityDisplayTest.php b/core/modules/field_ui/tests/src/Kernel/EntityDisplayTest.php
index d0601639b876c5df3acd05fb90a45b20e138e102..9e46d82da9e2e45fc6aa880a0c0d0dc8133234ab 100644
--- a/core/modules/field_ui/tests/src/Kernel/EntityDisplayTest.php
+++ b/core/modules/field_ui/tests/src/Kernel/EntityDisplayTest.php
@@ -29,46 +29,46 @@ class EntityDisplayTest extends KernelTestBase {
    *
    * @var string[]
    */
-  public static $modules = array('field_ui', 'field', 'entity_test', 'user', 'text', 'field_test', 'node', 'system');
+  public static $modules = ['field_ui', 'field', 'entity_test', 'user', 'text', 'field_test', 'node', 'system'];
 
   protected function setUp() {
     parent::setUp();
     $this->installEntitySchema('node');
     $this->installEntitySchema('user');
-    $this->installConfig(array('field', 'node', 'user'));
+    $this->installConfig(['field', 'node', 'user']);
   }
 
   /**
    * Tests basic CRUD operations on entity display objects.
    */
   public function testEntityDisplayCRUD() {
-    $display = EntityViewDisplay::create(array(
+    $display = EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ));
+    ]);
 
-    $expected = array();
+    $expected = [];
 
     // Check that providing no 'weight' results in the highest current weight
     // being assigned. The 'name' field's formatter has weight -5, therefore
     // these follow.
-    $expected['component_1'] = array('weight' => -4, 'settings' => array(), 'third_party_settings' => array());
-    $expected['component_2'] = array('weight' => -3, 'settings' => array(), 'third_party_settings' => array());
+    $expected['component_1'] = ['weight' => -4, 'settings' => [], 'third_party_settings' => []];
+    $expected['component_2'] = ['weight' => -3, 'settings' => [], 'third_party_settings' => []];
     $display->setComponent('component_1');
     $display->setComponent('component_2');
     $this->assertEqual($display->getComponent('component_1'), $expected['component_1']);
     $this->assertEqual($display->getComponent('component_2'), $expected['component_2']);
 
     // Check that arbitrary options are correctly stored.
-    $expected['component_3'] = array('weight' => 10, 'third_party_settings' => array('field_test' => array('foo' => 'bar')), 'settings' => array());
+    $expected['component_3'] = ['weight' => 10, 'third_party_settings' => ['field_test' => ['foo' => 'bar']], 'settings' => []];
     $display->setComponent('component_3', $expected['component_3']);
     $this->assertEqual($display->getComponent('component_3'), $expected['component_3']);
 
     // Check that the display can be properly saved and read back.
     $display->save();
     $display = EntityViewDisplay::load($display->id());
-    foreach (array('component_1', 'component_2', 'component_3') as $name) {
+    foreach (['component_1', 'component_2', 'component_3'] as $name) {
       $expected[$name]['region'] = 'content';
       $this->assertEqual($display->getComponent($name), $expected[$name]);
     }
@@ -79,16 +79,16 @@ public function testEntityDisplayCRUD() {
     $this->assertEqual('bar', $display->getThirdPartySetting('entity_test', 'foo'), 'Third party settings were added to the entity view display.');
 
     // Check that getComponents() returns options for all components.
-    $expected['name'] = array(
+    $expected['name'] = [
       'label' => 'hidden',
       'type' => 'string',
       'weight' => -5,
-      'settings' => array(
+      'settings' => [
         'link_to_entity' => FALSE,
-      ),
-      'third_party_settings' => array(),
+      ],
+      'third_party_settings' => [],
       'region' => 'content'
-    );
+    ];
     $this->assertEqual($display->getComponents(), $expected);
 
     // Check that a component can be removed.
@@ -102,12 +102,12 @@ public function testEntityDisplayCRUD() {
 
     // Check that createCopy() creates a new component that can be correctly
     // saved.
-    EntityViewMode::create(array('id' => $display->getTargetEntityTypeId() . '.other_view_mode', 'targetEntityType' => $display->getTargetEntityTypeId()))->save();
+    EntityViewMode::create(['id' => $display->getTargetEntityTypeId() . '.other_view_mode', 'targetEntityType' => $display->getTargetEntityTypeId()])->save();
     $new_display = $display->createCopy('other_view_mode');
     $new_display->save();
     $new_display = EntityViewDisplay::load($new_display->id());
     $dependencies = $new_display->calculateDependencies()->getDependencies();
-    $this->assertEqual(array('config' => array('core.entity_view_mode.entity_test.other_view_mode'), 'module' => array('entity_test')), $dependencies);
+    $this->assertEqual(['config' => ['core.entity_view_mode.entity_test.other_view_mode'], 'module' => ['entity_test']], $dependencies);
     $this->assertEqual($new_display->getTargetEntityTypeId(), $display->getTargetEntityTypeId());
     $this->assertEqual($new_display->getTargetBundle(), $display->getTargetBundle());
     $this->assertEqual($new_display->getMode(), 'other_view_mode');
@@ -118,18 +118,18 @@ public function testEntityDisplayCRUD() {
    * Test sorting of components by name on basic CRUD operations
    */
   public function testEntityDisplayCRUDSort() {
-    $display = EntityViewDisplay::create(array(
+    $display = EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ));
+    ]);
     $display->setComponent('component_3');
     $display->setComponent('component_1');
     $display->setComponent('component_2');
     $display->save();
     $components = array_keys($display->getComponents());
     // The name field is not configurable so will be added automatically.
-    $expected = array ( 0 => 'component_1', 1 => 'component_2', 2 => 'component_3', 'name');
+    $expected =  [ 0 => 'component_1', 1 => 'component_2', 2 => 'component_3', 'name'];
     $this->assertIdentical($components, $expected);
   }
 
@@ -143,14 +143,14 @@ public function testEntityGetDisplay() {
     $this->assertTrue($display->isNew());
 
     // Add some components and save the display.
-    $display->setComponent('component_1', array('weight' => 10, 'settings' => array()))
+    $display->setComponent('component_1', ['weight' => 10, 'settings' => []])
       ->save();
 
     // Check that entity_get_display() returns the correct object.
     $display = entity_get_display('entity_test', 'entity_test', 'default');
     $this->assertFalse($display->isNew());
     $this->assertEqual($display->id(), 'entity_test.entity_test.default');
-    $this->assertEqual($display->getComponent('component_1'), array( 'weight' => 10, 'settings' => array(), 'third_party_settings' => array(), 'region' => 'content'));
+    $this->assertEqual($display->getComponent('component_1'), [ 'weight' => 10, 'settings' => [], 'third_party_settings' => [], 'region' => 'content']);
   }
 
   /**
@@ -158,22 +158,22 @@ public function testEntityGetDisplay() {
    */
   public function testExtraFieldComponent() {
     entity_test_create_bundle('bundle_with_extra_fields');
-    $display = EntityViewDisplay::create(array(
+    $display = EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'bundle_with_extra_fields',
       'mode' => 'default',
-    ));
+    ]);
 
     // Check that the default visibility taken into account for extra fields
     // unknown in the display.
-    $this->assertEqual($display->getComponent('display_extra_field'), array('weight' => 5, 'region' => 'content'));
+    $this->assertEqual($display->getComponent('display_extra_field'), ['weight' => 5, 'region' => 'content']);
     $this->assertNull($display->getComponent('display_extra_field_hidden'));
 
     // Check that setting explicit options overrides the defaults.
     $display->removeComponent('display_extra_field');
-    $display->setComponent('display_extra_field_hidden', array('weight' => 10));
+    $display->setComponent('display_extra_field_hidden', ['weight' => 10]);
     $this->assertNull($display->getComponent('display_extra_field'));
-    $this->assertEqual($display->getComponent('display_extra_field_hidden'), array('weight' => 10, 'settings' => array(), 'third_party_settings' => array()));
+    $this->assertEqual($display->getComponent('display_extra_field_hidden'), ['weight' => 10, 'settings' => [], 'third_party_settings' => []]);
   }
 
   /**
@@ -181,7 +181,7 @@ public function testExtraFieldComponent() {
    */
   public function testExtraFieldComponentInitialInvalidConfig() {
     entity_test_create_bundle('bundle_with_extra_fields');
-    $display = EntityViewDisplay::create(array(
+    $display = EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'bundle_with_extra_fields',
       'mode' => 'default',
@@ -191,18 +191,18 @@ public function testExtraFieldComponentInitialInvalidConfig() {
           'weight' => 5,
         ],
       ],
-    ));
+    ]);
 
     // Check that the default visibility taken into account for extra fields
     // unknown in the display that were included in the initial config.
-    $this->assertEqual($display->getComponent('display_extra_field'), array('weight' => 5, 'region' => 'content'));
+    $this->assertEqual($display->getComponent('display_extra_field'), ['weight' => 5, 'region' => 'content']);
     $this->assertNull($display->getComponent('display_extra_field_hidden'));
 
     // Check that setting explicit options overrides the defaults.
     $display->removeComponent('display_extra_field');
-    $display->setComponent('display_extra_field_hidden', array('weight' => 10));
+    $display->setComponent('display_extra_field_hidden', ['weight' => 10]);
     $this->assertNull($display->getComponent('display_extra_field'));
-    $this->assertEqual($display->getComponent('display_extra_field_hidden'), array('weight' => 10, 'settings' => array(), 'third_party_settings' => array()));
+    $this->assertEqual($display->getComponent('display_extra_field_hidden'), ['weight' => 10, 'settings' => [], 'third_party_settings' => []]);
   }
 
   /**
@@ -211,36 +211,36 @@ public function testExtraFieldComponentInitialInvalidConfig() {
   public function testFieldComponent() {
     $field_name = 'test_field';
     // Create a field storage and a field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'test_field'
-    ));
+    ]);
     $field_storage->save();
-    $field = FieldConfig::create(array(
+    $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'entity_test',
-    ));
+    ]);
     $field->save();
 
-    $display = EntityViewDisplay::create(array(
+    $display = EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ));
+    ]);
 
     // Check that providing no options results in default values being used.
     $display->setComponent($field_name);
     $field_type_info = \Drupal::service('plugin.manager.field.field_type')->getDefinition($field_storage->getType());
     $default_formatter = $field_type_info['default_formatter'];
     $formatter_settings = \Drupal::service('plugin.manager.field.formatter')->getDefaultSettings($default_formatter);
-    $expected = array(
+    $expected = [
       'weight' => -4,
       'label' => 'above',
       'type' => $default_formatter,
       'settings' => $formatter_settings,
-      'third_party_settings' => array(),
-    );
+      'third_party_settings' => [],
+    ];
     $this->assertEqual($display->getComponent($field_name), $expected);
 
     // Check that the getFormatter() method returns the correct formatter plugin.
@@ -256,9 +256,9 @@ public function testFieldComponent() {
     $this->assertEqual($formatter->randomValue, $random_value);
 
     // Check that changing the definition creates a new formatter.
-    $display->setComponent($field_name, array(
+    $display->setComponent($field_name, [
       'type' => 'field_test_multiple',
-    ));
+    ]);
     $formatter = $display->getRenderer($field_name);
     $this->assertEqual($formatter->getPluginId(), 'field_test_multiple');
     $this->assertFalse(isset($formatter->randomValue));
@@ -266,40 +266,40 @@ public function testFieldComponent() {
     // Check that the display has dependencies on the field and the module that
     // provides the formatter.
     $dependencies = $display->calculateDependencies()->getDependencies();
-    $this->assertEqual(array('config' => array('field.field.entity_test.entity_test.test_field'), 'module' => array('entity_test', 'field_test')), $dependencies);
+    $this->assertEqual(['config' => ['field.field.entity_test.entity_test.test_field'], 'module' => ['entity_test', 'field_test']], $dependencies);
   }
 
   /**
    * Tests the behavior of a field component for a base field.
    */
   public function testBaseFieldComponent() {
-    $display = EntityViewDisplay::create(array(
+    $display = EntityViewDisplay::create([
       'targetEntityType' => 'entity_test_base_field_display',
       'bundle' => 'entity_test_base_field_display',
       'mode' => 'default',
-    ));
+    ]);
 
     // Check that default options are correctly filled in.
     $formatter_settings = \Drupal::service('plugin.manager.field.formatter')->getDefaultSettings('text_default');
-    $expected = array(
+    $expected = [
       'test_no_display' => NULL,
-      'test_display_configurable' => array(
+      'test_display_configurable' => [
         'label' => 'above',
         'type' => 'text_default',
         'settings' => $formatter_settings,
-        'third_party_settings' => array(),
+        'third_party_settings' => [],
         'weight' => 10,
         'region' => 'content',
-      ),
-      'test_display_non_configurable' => array(
+      ],
+      'test_display_non_configurable' => [
         'label' => 'above',
         'type' => 'text_default',
         'settings' => $formatter_settings,
-        'third_party_settings' => array(),
+        'third_party_settings' => [],
         'weight' => 11,
         'region' => 'content',
-      ),
-    );
+      ],
+    ];
     foreach ($expected as $field_name => $options) {
       $this->assertEqual($display->getComponent($field_name), $options);
     }
@@ -337,7 +337,7 @@ public function testBaseFieldComponent() {
    */
   public function testDeleteBundle() {
     // Create a node bundle, display and form display object.
-    $type = NodeType::create(array('type' => 'article'));
+    $type = NodeType::create(['type' => 'article']);
     $type->save();
     node_add_body_field($type);
     entity_get_display('node', 'article', 'default')->save();
@@ -357,30 +357,30 @@ public function testDeleteBundle() {
   public function testDeleteField() {
     $field_name = 'test_field';
     // Create a field storage and a field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'test_field'
-    ));
+    ]);
     $field_storage->save();
-    $field = FieldConfig::create(array(
+    $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'entity_test',
-    ));
+    ]);
     $field->save();
 
     // Create default and teaser entity display.
-    EntityViewMode::create(array('id' => 'entity_test.teaser', 'targetEntityType' => 'entity_test'))->save();
-    EntityViewDisplay::create(array(
+    EntityViewMode::create(['id' => 'entity_test.teaser', 'targetEntityType' => 'entity_test'])->save();
+    EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ))->setComponent($field_name)->save();
-    EntityViewDisplay::create(array(
+    ])->setComponent($field_name)->save();
+    EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'teaser',
-    ))->setComponent($field_name)->save();
+    ])->setComponent($field_name)->save();
 
     // Check the component exists.
     $display = entity_get_display('entity_test', 'entity_test', 'default');
@@ -402,27 +402,27 @@ public function testDeleteField() {
    * Tests \Drupal\Core\Entity\EntityDisplayBase::onDependencyRemoval().
    */
   public function testOnDependencyRemoval() {
-    $this->enableModules(array('field_plugins_test'));
+    $this->enableModules(['field_plugins_test']);
 
     $field_name = 'test_field';
     // Create a field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'text'
-    ));
+    ]);
     $field_storage->save();
-    $field = FieldConfig::create(array(
+    $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'entity_test',
-    ));
+    ]);
     $field->save();
 
-    EntityViewDisplay::create(array(
+    EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ))->setComponent($field_name, array('type' => 'field_plugins_test_text_formatter'))->save();
+    ])->setComponent($field_name, ['type' => 'field_plugins_test_text_formatter'])->save();
 
     // Check the component exists and is of the correct type.
     $display = entity_get_display('entity_test', 'entity_test', 'default');
@@ -460,47 +460,47 @@ public function testEntityDisplayInvalidateCacheTags() {
    * Test getDisplayModeOptions().
    */
   public function testGetDisplayModeOptions() {
-    NodeType::create(array('type' => 'article'))->save();
+    NodeType::create(['type' => 'article'])->save();
 
-    EntityViewDisplay::create(array(
+    EntityViewDisplay::create([
       'targetEntityType' => 'node',
       'bundle' => 'article',
       'mode' => 'default',
-    ))->setStatus(TRUE)->save();
+    ])->setStatus(TRUE)->save();
 
-    $display_teaser = EntityViewDisplay::create(array(
+    $display_teaser = EntityViewDisplay::create([
       'targetEntityType' => 'node',
       'bundle' => 'article',
       'mode' => 'teaser',
-    ));
+    ]);
     $display_teaser->save();
 
-    EntityFormDisplay::create(array(
+    EntityFormDisplay::create([
       'targetEntityType' => 'user',
       'bundle' => 'user',
       'mode' => 'default',
-    ))->setStatus(TRUE)->save();
+    ])->setStatus(TRUE)->save();
 
-    $form_display_teaser = EntityFormDisplay::create(array(
+    $form_display_teaser = EntityFormDisplay::create([
       'targetEntityType' => 'user',
       'bundle' => 'user',
       'mode' => 'register',
-    ));
+    ]);
     $form_display_teaser->save();
 
     // Test getViewModeOptionsByBundle().
     $view_modes = \Drupal::entityManager()->getViewModeOptionsByBundle('node', 'article');
-    $this->assertEqual($view_modes, array('default' => 'Default'));
+    $this->assertEqual($view_modes, ['default' => 'Default']);
     $display_teaser->setStatus(TRUE)->save();
     $view_modes = \Drupal::entityManager()->getViewModeOptionsByBundle('node', 'article');
-    $this->assertEqual($view_modes, array('default' => 'Default', 'teaser' => 'Teaser'));
+    $this->assertEqual($view_modes, ['default' => 'Default', 'teaser' => 'Teaser']);
 
     // Test getFormModeOptionsByBundle().
     $form_modes = \Drupal::entityManager()->getFormModeOptionsByBundle('user', 'user');
-    $this->assertEqual($form_modes, array('default' => 'Default'));
+    $this->assertEqual($form_modes, ['default' => 'Default']);
     $form_display_teaser->setStatus(TRUE)->save();
     $form_modes = \Drupal::entityManager()->getFormModeOptionsByBundle('user', 'user');
-    $this->assertEqual($form_modes, array('default' => 'Default', 'register' => 'Register'));
+    $this->assertEqual($form_modes, ['default' => 'Default', 'register' => 'Register']);
   }
 
   /**
diff --git a/core/modules/field_ui/tests/src/Kernel/EntityFormDisplayTest.php b/core/modules/field_ui/tests/src/Kernel/EntityFormDisplayTest.php
index 6f770d6fdf5044113d57233110109e2cbe320690..09d2a20114a325ed3682e84e56ffe5056ebe8f11 100644
--- a/core/modules/field_ui/tests/src/Kernel/EntityFormDisplayTest.php
+++ b/core/modules/field_ui/tests/src/Kernel/EntityFormDisplayTest.php
@@ -36,14 +36,14 @@ public function testEntityGetFromDisplay() {
     $this->assertTrue($form_display->isNew());
 
     // Add some components and save the display.
-    $form_display->setComponent('component_1', array('weight' => 10))
+    $form_display->setComponent('component_1', ['weight' => 10])
       ->save();
 
     // Check that entity_get_form_display() returns the correct object.
     $form_display = entity_get_form_display('entity_test', 'entity_test', 'default');
     $this->assertFalse($form_display->isNew());
     $this->assertEqual($form_display->id(), 'entity_test.entity_test.default');
-    $this->assertEqual($form_display->getComponent('component_1'), array('weight' => 10, 'settings' => array(), 'third_party_settings' => array(), 'region' => 'content'));
+    $this->assertEqual($form_display->getComponent('component_1'), ['weight' => 10, 'settings' => [], 'third_party_settings' => [], 'region' => 'content']);
   }
 
   /**
@@ -52,35 +52,35 @@ public function testEntityGetFromDisplay() {
   public function testFieldComponent() {
     // Create a field storage and a field.
     $field_name = 'test_field';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'test_field'
-    ));
+    ]);
     $field_storage->save();
-    $field = FieldConfig::create(array(
+    $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'entity_test',
-    ));
+    ]);
     $field->save();
 
-    $form_display = EntityFormDisplay::create(array(
+    $form_display = EntityFormDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ));
+    ]);
 
     // Check that providing no options results in default values being used.
     $form_display->setComponent($field_name);
     $field_type_info = \Drupal::service('plugin.manager.field.field_type')->getDefinition($field_storage->getType());
     $default_widget = $field_type_info['default_widget'];
     $widget_settings = \Drupal::service('plugin.manager.field.widget')->getDefaultSettings($default_widget);
-    $expected = array(
+    $expected = [
       'weight' => 3,
       'type' => $default_widget,
       'settings' => $widget_settings,
-      'third_party_settings' => array(),
-    );
+      'third_party_settings' => [],
+    ];
     $this->assertEqual($form_display->getComponent($field_name), $expected);
 
     // Check that the getWidget() method returns the correct widget plugin.
@@ -96,9 +96,9 @@ public function testFieldComponent() {
     $this->assertEqual($widget->randomValue, $random_value);
 
     // Check that changing the definition creates a new widget.
-    $form_display->setComponent($field_name, array(
+    $form_display->setComponent($field_name, [
       'type' => 'field_test_multiple',
-    ));
+    ]);
     $widget = $form_display->getRenderer($field_name);
     $this->assertEqual($widget->getPluginId(), 'test_field_widget');
     $this->assertFalse(isset($widget->randomValue));
@@ -106,9 +106,9 @@ public function testFieldComponent() {
     // Check that specifying an unknown widget (e.g. case of a disabled module)
     // gets stored as is in the display, but results in the default widget being
     // used.
-    $form_display->setComponent($field_name, array(
+    $form_display->setComponent($field_name, [
       'type' => 'unknown_widget',
-    ));
+    ]);
     $options = $form_display->getComponent($field_name);
     $this->assertEqual($options['type'], 'unknown_widget');
     $widget = $form_display->getRenderer($field_name);
@@ -119,31 +119,31 @@ public function testFieldComponent() {
    * Tests the behavior of a field component for a base field.
    */
   public function testBaseFieldComponent() {
-    $display = EntityFormDisplay::create(array(
+    $display = EntityFormDisplay::create([
       'targetEntityType' => 'entity_test_base_field_display',
       'bundle' => 'entity_test_base_field_display',
       'mode' => 'default',
-    ));
+    ]);
 
     // Check that default options are correctly filled in.
     $formatter_settings = \Drupal::service('plugin.manager.field.widget')->getDefaultSettings('text_textfield');
-    $expected = array(
+    $expected = [
       'test_no_display' => NULL,
-      'test_display_configurable' => array(
+      'test_display_configurable' => [
         'type' => 'text_textfield',
         'settings' => $formatter_settings,
-        'third_party_settings' => array(),
+        'third_party_settings' => [],
         'weight' => 10,
         'region' => 'content',
-      ),
-      'test_display_non_configurable' => array(
+      ],
+      'test_display_non_configurable' => [
         'type' => 'text_textfield',
         'settings' => $formatter_settings,
-        'third_party_settings' => array(),
+        'third_party_settings' => [],
         'weight' => 11,
         'region' => 'content',
-      ),
-    );
+      ],
+    ];
     foreach ($expected as $field_name => $options) {
       $this->assertEqual($display->getComponent($field_name), $options);
     }
@@ -182,30 +182,30 @@ public function testBaseFieldComponent() {
   public function testDeleteField() {
     $field_name = 'test_field';
     // Create a field storage and a field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'test_field'
-    ));
+    ]);
     $field_storage->save();
-    $field = FieldConfig::create(array(
+    $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'entity_test',
-    ));
+    ]);
     $field->save();
 
     // Create default and compact entity display.
-    EntityFormMode::create(array('id' => 'entity_test.compact', 'targetEntityType' => 'entity_test'))->save();
-    EntityFormDisplay::create(array(
+    EntityFormMode::create(['id' => 'entity_test.compact', 'targetEntityType' => 'entity_test'])->save();
+    EntityFormDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ))->setComponent($field_name)->save();
-    EntityFormDisplay::create(array(
+    ])->setComponent($field_name)->save();
+    EntityFormDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'compact',
-    ))->setComponent($field_name)->save();
+    ])->setComponent($field_name)->save();
 
     // Check the component exists.
     $display = entity_get_form_display('entity_test', 'entity_test', 'default');
@@ -227,27 +227,27 @@ public function testDeleteField() {
    * Tests \Drupal\Core\Entity\EntityDisplayBase::onDependencyRemoval().
    */
   public function testOnDependencyRemoval() {
-    $this->enableModules(array('field_plugins_test'));
+    $this->enableModules(['field_plugins_test']);
 
     $field_name = 'test_field';
     // Create a field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'text'
-    ));
+    ]);
     $field_storage->save();
-    $field = FieldConfig::create(array(
+    $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'entity_test',
-    ));
+    ]);
     $field->save();
 
-    EntityFormDisplay::create(array(
+    EntityFormDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ))->setComponent($field_name, array('type' => 'field_plugins_test_text_widget'))->save();
+    ])->setComponent($field_name, ['type' => 'field_plugins_test_text_widget'])->save();
 
     // Check the component exists and is of the correct type.
     $display = entity_get_form_display('entity_test', 'entity_test', 'default');
diff --git a/core/modules/file/file.api.php b/core/modules/file/file.api.php
index c7994ff7231466b1ac7959f57704edb800b2c323..1fda717da7aabdc7a2793c95dfc149797934563d 100644
--- a/core/modules/file/file.api.php
+++ b/core/modules/file/file.api.php
@@ -25,7 +25,7 @@
  * @see file_validate()
  */
 function hook_file_validate(Drupal\file\FileInterface $file) {
-  $errors = array();
+  $errors = [];
 
   if (!$file->getFilename()) {
     $errors[] = t("The file's name is empty. Please give a name to the file.");
@@ -53,7 +53,7 @@ function hook_file_copy(Drupal\file\FileInterface $file, Drupal\file\FileInterfa
     $file->setFilename($file->getOwner()->name . '_' . $file->getFilename());
     $file->save();
 
-    \Drupal::logger('file')->notice('Copied file %source has been renamed to %destination', array('%source' => $source->filename, '%destination' => $file->getFilename()));
+    \Drupal::logger('file')->notice('Copied file %source has been renamed to %destination', ['%source' => $source->filename, '%destination' => $file->getFilename()]);
   }
 }
 
@@ -73,7 +73,7 @@ function hook_file_move(Drupal\file\FileInterface $file, Drupal\file\FileInterfa
     $file->setFilename($file->getOwner()->name . '_' . $file->getFilename());
     $file->save();
 
-    \Drupal::logger('file')->notice('Moved file %source has been renamed to %destination', array('%source' => $source->filename, '%destination' => $file->getFilename()));
+    \Drupal::logger('file')->notice('Moved file %source has been renamed to %destination', ['%source' => $source->filename, '%destination' => $file->getFilename()]);
   }
 }
 
diff --git a/core/modules/file/file.field.inc b/core/modules/file/file.field.inc
index bbfc2b23ea4da18d44f6c8eb7e5a26fcc4d2b405..80ffbe99794758c3fe381637955ffaf0e7e10691 100644
--- a/core/modules/file/file.field.inc
+++ b/core/modules/file/file.field.inc
@@ -26,26 +26,26 @@ function template_preprocess_file_widget_multiple(&$variables) {
   $table_id = $element['#id'] . '-table';
 
   // Build up a table of applicable fields.
-  $headers = array();
+  $headers = [];
   $headers[] = t('File information');
   if ($element['#display_field']) {
-    $headers[] = array(
+    $headers[] = [
       'data' => t('Display'),
-      'class' => array('checkbox'),
-    );
+      'class' => ['checkbox'],
+    ];
   }
   $headers[] = t('Weight');
   $headers[] = t('Operations');
 
   // Get our list of widgets in order (needed when the form comes back after
   // preview or failed validation).
-  $widgets = array();
+  $widgets = [];
   foreach (Element::children($element) as $key) {
     $widgets[] = &$element[$key];
   }
   usort($widgets, '_field_multiple_value_form_sort_helper');
 
-  $rows = array();
+  $rows = [];
   foreach ($widgets as $key => &$widget) {
     // Save the uploading row for last.
     if (empty($widget['#files'])) {
@@ -56,7 +56,7 @@ function template_preprocess_file_widget_multiple(&$variables) {
 
     // Delay rendering of the buttons, so that they can be rendered later in the
     // "operations" column.
-    $operations_elements = array();
+    $operations_elements = [];
     foreach (Element::children($widget) as $sub_key) {
       if (isset($widget[$sub_key]['#type']) && $widget[$sub_key]['#type'] == 'submit') {
         hide($widget[$sub_key]);
@@ -72,21 +72,21 @@ function template_preprocess_file_widget_multiple(&$variables) {
     hide($widget['_weight']);
 
     // Render everything else together in a column, without the normal wrappers.
-    $widget['#theme_wrappers'] = array();
+    $widget['#theme_wrappers'] = [];
     $information = drupal_render($widget);
     $display = '';
     if ($element['#display_field']) {
       unset($widget['display']['#title']);
-      $display = array(
+      $display = [
         'data' => render($widget['display']),
-        'class' => array('checkbox'),
-      );
+        'class' => ['checkbox'],
+      ];
     }
-    $widget['_weight']['#attributes']['class'] = array($weight_class);
+    $widget['_weight']['#attributes']['class'] = [$weight_class];
     $weight = render($widget['_weight']);
 
     // Arrange the row with all of the rendered columns.
-    $row = array();
+    $row = [];
     $row[] = $information;
     if ($element['#display_field']) {
       $row[] = $display;
@@ -98,31 +98,31 @@ function template_preprocess_file_widget_multiple(&$variables) {
     foreach (Element::children($operations_elements) as $key) {
       show($operations_elements[$key]);
     }
-    $row[] = array(
+    $row[] = [
       'data' => $operations_elements,
-    );
-    $rows[] = array(
+    ];
+    $rows[] = [
       'data' => $row,
-      'class' => isset($widget['#attributes']['class']) ? array_merge($widget['#attributes']['class'], array('draggable')) : array('draggable'),
-    );
+      'class' => isset($widget['#attributes']['class']) ? array_merge($widget['#attributes']['class'], ['draggable']) : ['draggable'],
+    ];
   }
 
-  $variables['table'] = array(
+  $variables['table'] = [
     '#type' => 'table',
     '#header' => $headers,
     '#rows' => $rows,
-    '#attributes' => array(
+    '#attributes' => [
       'id' => $table_id,
-    ),
-    '#tabledrag' => array(
-      array(
+    ],
+    '#tabledrag' => [
+      [
         'action' => 'order',
         'relationship' => 'sibling',
         'group' => $weight_class,
-      ),
-    ),
+      ],
+    ],
     '#access' => !empty($rows),
-  );
+  ];
 
   $variables['element'] = $element;
 }
@@ -144,7 +144,7 @@ function template_preprocess_file_upload_help(&$variables) {
   $upload_validators = $variables['upload_validators'];
   $cardinality = $variables['cardinality'];
 
-  $descriptions = array();
+  $descriptions = [];
 
   if (!empty($description)) {
     $descriptions[] = FieldFilteredMarkup::create($description);
@@ -158,26 +158,26 @@ function template_preprocess_file_upload_help(&$variables) {
     }
   }
   if (isset($upload_validators['file_validate_size'])) {
-    $descriptions[] = t('@size limit.', array('@size' => format_size($upload_validators['file_validate_size'][0])));
+    $descriptions[] = t('@size limit.', ['@size' => format_size($upload_validators['file_validate_size'][0])]);
   }
   if (isset($upload_validators['file_validate_extensions'])) {
-    $descriptions[] = t('Allowed types: @extensions.', array('@extensions' => $upload_validators['file_validate_extensions'][0]));
+    $descriptions[] = t('Allowed types: @extensions.', ['@extensions' => $upload_validators['file_validate_extensions'][0]]);
   }
 
   if (isset($upload_validators['file_validate_image_resolution'])) {
     $max = $upload_validators['file_validate_image_resolution'][0];
     $min = $upload_validators['file_validate_image_resolution'][1];
     if ($min && $max && $min == $max) {
-      $descriptions[] = t('Images must be exactly <strong>@size</strong> pixels.', array('@size' => $max));
+      $descriptions[] = t('Images must be exactly <strong>@size</strong> pixels.', ['@size' => $max]);
     }
     elseif ($min && $max) {
-      $descriptions[] = t('Images must be larger than <strong>@min</strong> pixels. Images larger than <strong>@max</strong> pixels will be resized.', array('@min' => $min, '@max' => $max));
+      $descriptions[] = t('Images must be larger than <strong>@min</strong> pixels. Images larger than <strong>@max</strong> pixels will be resized.', ['@min' => $min, '@max' => $max]);
     }
     elseif ($min) {
-      $descriptions[] = t('Images must be larger than <strong>@min</strong> pixels.', array('@min' => $min));
+      $descriptions[] = t('Images must be larger than <strong>@min</strong> pixels.', ['@min' => $min]);
     }
     elseif ($max) {
-      $descriptions[] = t('Images larger than <strong>@max</strong> pixels will be resized.', array('@max' => $max));
+      $descriptions[] = t('Images larger than <strong>@max</strong> pixels will be resized.', ['@max' => $max]);
     }
   }
 
diff --git a/core/modules/file/file.install b/core/modules/file/file.install
index d371384664e8c5caf8a8dd0e0635c2879e7ad8ed..9134a25e9e29b6f9129a64ed7993db35c130c429 100644
--- a/core/modules/file/file.install
+++ b/core/modules/file/file.install
@@ -9,51 +9,51 @@
  * Implements hook_schema().
  */
 function file_schema() {
-  $schema['file_usage'] = array(
+  $schema['file_usage'] = [
     'description' => 'Track where a file is used.',
-    'fields' => array(
-      'fid' => array(
+    'fields' => [
+      'fid' => [
         'description' => 'File ID.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
-      ),
-      'module' => array(
+      ],
+      'module' => [
         'description' => 'The name of the module that is using the file.',
         'type' => 'varchar_ascii',
         'length' => DRUPAL_EXTENSION_NAME_MAX_LENGTH,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'type' => array(
+      ],
+      'type' => [
         'description' => 'The name of the object type in which the file is used.',
         'type' => 'varchar_ascii',
         'length' => 64,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'id' => array(
+      ],
+      'id' => [
         'description' => 'The primary key of the object using the file.',
         'type' => 'varchar_ascii',
         'length' => 64,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'count' => array(
+      ],
+      'count' => [
         'description' => 'The number of times this file is used by this object.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'primary key' => array('fid', 'type', 'id', 'module'),
-    'indexes' => array(
-      'type_id' => array('type', 'id'),
-      'fid_count' => array('fid', 'count'),
-      'fid_module' => array('fid', 'module'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['fid', 'type', 'id', 'module'],
+    'indexes' => [
+      'type_id' => ['type', 'id'],
+      'fid_count' => ['fid', 'count'],
+      'fid_module' => ['fid', 'module'],
+    ],
+  ];
   return $schema;
 }
 
@@ -63,7 +63,7 @@ function file_schema() {
  * Display information about getting upload progress bars working.
  */
 function file_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
 
   // Check the server's ability to indicate upload progress.
   if ($phase == 'runtime') {
@@ -107,11 +107,11 @@ function file_requirements($phase) {
     elseif ($implementation == 'uploadprogress') {
       $value = t('Enabled (<a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress</a>)');
     }
-    $requirements['file_progress'] = array(
+    $requirements['file_progress'] = [
       'title' => t('Upload progress'),
       'value' => $value,
       'description' => $description,
-    );
+    ];
   }
 
   return $requirements;
diff --git a/core/modules/file/file.module b/core/modules/file/file.module
index 687a62c70b297872ad4cd220261cf1b25aa0d7c6..a6fc3f6ebe0ab4e06f0ad6206bb8d40c9b9685db 100644
--- a/core/modules/file/file.module
+++ b/core/modules/file/file.module
@@ -30,15 +30,15 @@ function file_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.file':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The File module allows you to create fields that contain files. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":file_documentation">online documentation for the File module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':file_documentation' => 'https://www.drupal.org/documentation/modules/file')) . '</p>';
+      $output .= '<p>' . t('The File module allows you to create fields that contain files. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":file_documentation">online documentation for the File module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':file_documentation' => 'https://www.drupal.org/documentation/modules/file']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing and displaying file fields') . '</dt>';
-      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the file field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the file field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Allowing file extensions') . '</dt>';
       $output .= '<dd>' . t('In the field settings, you can define the allowed file extensions (for example <em>pdf docx psd</em>) for the files that will be uploaded with the file field.') . '</dd>';
       $output .= '<dt>' . t('Storing files') . '</dt>';
-      $output .= '<dd>' . t('Uploaded files can either be stored as <em>public</em> or <em>private</em>, depending on the <a href=":file-system">File system settings</a>. For more information, see the <a href=":system-help">System module help page</a>.', array(':file-system' => \Drupal::url('system.file_system_settings'), ':system-help' => \Drupal::url('help.page', array('name' => 'system')))) . '</dd>';
+      $output .= '<dd>' . t('Uploaded files can either be stored as <em>public</em> or <em>private</em>, depending on the <a href=":file-system">File system settings</a>. For more information, see the <a href=":system-help">System module help page</a>.', [':file-system' => \Drupal::url('system.file_system_settings'), ':system-help' => \Drupal::url('help.page', ['name' => 'system'])]) . '</dd>';
       $output .= '<dt>' . t('Restricting the maximum file size') . '</dt>';
       $output .= '<dd>' . t('The maximum file size that users can upload is limited by PHP settings of the server, but you can restrict by entering the desired value as the <em>Maximum upload size</em> setting. The maximum file size is automatically displayed to users in the help text of the file field.') . '</dd>';
       $output .= '<dt>' . t('Displaying files and descriptions') . '<dt>';
@@ -96,7 +96,7 @@ function file_load_multiple(array $fids = NULL, $reset = FALSE) {
  */
 function file_load($fid, $reset = FALSE) {
   if ($reset) {
-    \Drupal::entityManager()->getStorage('file')->resetCache(array($fid));
+    \Drupal::entityManager()->getStorage('file')->resetCache([$fid]);
   }
   return File::load($fid);
 }
@@ -141,12 +141,12 @@ function file_load($fid, $reset = FALSE) {
 function file_copy(FileInterface $source, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
   if (!file_valid_uri($destination)) {
     if (($realpath = drupal_realpath($source->getFileUri())) !== FALSE) {
-      \Drupal::logger('file')->notice('File %file (%realpath) could not be copied because the destination %destination is invalid. This is often caused by improper use of file_copy() or a missing stream wrapper.', array('%file' => $source->getFileUri(), '%realpath' => $realpath, '%destination' => $destination));
+      \Drupal::logger('file')->notice('File %file (%realpath) could not be copied because the destination %destination is invalid. This is often caused by improper use of file_copy() or a missing stream wrapper.', ['%file' => $source->getFileUri(), '%realpath' => $realpath, '%destination' => $destination]);
     }
     else {
-      \Drupal::logger('file')->notice('File %file could not be copied because the destination %destination is invalid. This is often caused by improper use of file_copy() or a missing stream wrapper.', array('%file' => $source->getFileUri(), '%destination' => $destination));
+      \Drupal::logger('file')->notice('File %file could not be copied because the destination %destination is invalid. This is often caused by improper use of file_copy() or a missing stream wrapper.', ['%file' => $source->getFileUri(), '%destination' => $destination]);
     }
-    drupal_set_message(t('The specified file %file could not be copied because the destination is invalid. More information is available in the system log.', array('%file' => $source->getFileUri())), 'error');
+    drupal_set_message(t('The specified file %file could not be copied because the destination is invalid. More information is available in the system log.', ['%file' => $source->getFileUri()]), 'error');
     return FALSE;
   }
 
@@ -158,7 +158,7 @@ function file_copy(FileInterface $source, $destination = NULL, $replace = FILE_E
     // @todo Do not create a new entity in order to update it. See
     //   https://www.drupal.org/node/2241865.
     if ($replace == FILE_EXISTS_REPLACE) {
-      $existing_files = entity_load_multiple_by_properties('file', array('uri' => $uri));
+      $existing_files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
       if (count($existing_files)) {
         $existing = reset($existing_files);
         $file->fid = $existing->id();
@@ -175,7 +175,7 @@ function file_copy(FileInterface $source, $destination = NULL, $replace = FILE_E
     $file->save();
 
     // Inform modules that the file has been copied.
-    \Drupal::moduleHandler()->invokeAll('file_copy', array($file, $source));
+    \Drupal::moduleHandler()->invokeAll('file_copy', [$file, $source]);
 
     return $file;
   }
@@ -216,12 +216,12 @@ function file_copy(FileInterface $source, $destination = NULL, $replace = FILE_E
 function file_move(FileInterface $source, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
   if (!file_valid_uri($destination)) {
     if (($realpath = drupal_realpath($source->getFileUri())) !== FALSE) {
-      \Drupal::logger('file')->notice('File %file (%realpath) could not be moved because the destination %destination is invalid. This may be caused by improper use of file_move() or a missing stream wrapper.', array('%file' => $source->getFileUri(), '%realpath' => $realpath, '%destination' => $destination));
+      \Drupal::logger('file')->notice('File %file (%realpath) could not be moved because the destination %destination is invalid. This may be caused by improper use of file_move() or a missing stream wrapper.', ['%file' => $source->getFileUri(), '%realpath' => $realpath, '%destination' => $destination]);
     }
     else {
-      \Drupal::logger('file')->notice('File %file could not be moved because the destination %destination is invalid. This may be caused by improper use of file_move() or a missing stream wrapper.', array('%file' => $source->getFileUri(), '%destination' => $destination));
+      \Drupal::logger('file')->notice('File %file could not be moved because the destination %destination is invalid. This may be caused by improper use of file_move() or a missing stream wrapper.', ['%file' => $source->getFileUri(), '%destination' => $destination]);
     }
-    drupal_set_message(t('The specified file %file could not be moved because the destination is invalid. More information is available in the system log.', array('%file' => $source->getFileUri())), 'error');
+    drupal_set_message(t('The specified file %file could not be moved because the destination is invalid. More information is available in the system log.', ['%file' => $source->getFileUri()]), 'error');
     return FALSE;
   }
 
@@ -232,7 +232,7 @@ function file_move(FileInterface $source, $destination = NULL, $replace = FILE_E
     $file->setFileUri($uri);
     // If we are replacing an existing file re-use its database record.
     if ($replace == FILE_EXISTS_REPLACE) {
-      $existing_files = entity_load_multiple_by_properties('file', array('uri' => $uri));
+      $existing_files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
       if (count($existing_files)) {
         $existing = reset($existing_files);
         $delete_source = TRUE;
@@ -249,7 +249,7 @@ function file_move(FileInterface $source, $destination = NULL, $replace = FILE_E
     $file->save();
 
     // Inform modules that the file has been moved.
-    \Drupal::moduleHandler()->invokeAll('file_move', array($file, $source));
+    \Drupal::moduleHandler()->invokeAll('file_move', [$file, $source]);
 
     // Delete the original if it's not in use elsewhere.
     if ($delete_source && !\Drupal::service('file.usage')->listUsage($source)) {
@@ -283,9 +283,9 @@ function file_move(FileInterface $source, $destination = NULL, $replace = FILE_E
  *
  * @see hook_file_validate()
  */
-function file_validate(FileInterface $file, $validators = array()) {
+function file_validate(FileInterface $file, $validators = []) {
   // Call the validation functions specified by this function's caller.
-  $errors = array();
+  $errors = [];
   foreach ($validators as $function => $args) {
     if (function_exists($function)) {
       array_unshift($args, $file);
@@ -294,7 +294,7 @@ function file_validate(FileInterface $file, $validators = array()) {
   }
 
   // Let other modules perform validation on the new file.
-  return array_merge($errors, \Drupal::moduleHandler()->invokeAll('file_validate', array($file)));
+  return array_merge($errors, \Drupal::moduleHandler()->invokeAll('file_validate', [$file]));
 }
 
 /**
@@ -308,7 +308,7 @@ function file_validate(FileInterface $file, $validators = array()) {
  *   array containing an error message if it's not or is empty.
  */
 function file_validate_name_length(FileInterface $file) {
-  $errors = array();
+  $errors = [];
 
   if (!$file->getFilename()) {
     $errors[] = t("The file's name is empty. Please give a name to the file.");
@@ -334,11 +334,11 @@ function file_validate_name_length(FileInterface $file) {
  * @see hook_file_validate()
  */
 function file_validate_extensions(FileInterface $file, $extensions) {
-  $errors = array();
+  $errors = [];
 
   $regex = '/\.(' . preg_replace('/ +/', '|', preg_quote($extensions)) . ')$/i';
   if (!preg_match($regex, $file->getFilename())) {
-    $errors[] = t('Only files with the following extensions are allowed: %files-allowed.', array('%files-allowed' => $extensions));
+    $errors[] = t('Only files with the following extensions are allowed: %files-allowed.', ['%files-allowed' => $extensions]);
   }
   return $errors;
 }
@@ -363,15 +363,15 @@ function file_validate_extensions(FileInterface $file, $extensions) {
  */
 function file_validate_size(FileInterface $file, $file_limit = 0, $user_limit = 0) {
   $user = \Drupal::currentUser();
-  $errors = array();
+  $errors = [];
 
   if ($file_limit && $file->getSize() > $file_limit) {
-    $errors[] = t('The file is %filesize exceeding the maximum file size of %maxsize.', array('%filesize' => format_size($file->getSize()), '%maxsize' => format_size($file_limit)));
+    $errors[] = t('The file is %filesize exceeding the maximum file size of %maxsize.', ['%filesize' => format_size($file->getSize()), '%maxsize' => format_size($file_limit)]);
   }
 
   // Save a query by only calling spaceUsed() when a limit is provided.
   if ($user_limit && (\Drupal::entityManager()->getStorage('file')->spaceUsed($user->id()) + $file->getSize()) > $user_limit) {
-    $errors[] = t('The file is %filesize which would exceed your disk quota of %quota.', array('%filesize' => format_size($file->getSize()), '%quota' => format_size($user_limit)));
+    $errors[] = t('The file is %filesize which would exceed your disk quota of %quota.', ['%filesize' => format_size($file->getSize()), '%quota' => format_size($user_limit)]);
   }
 
   return $errors;
@@ -390,13 +390,13 @@ function file_validate_size(FileInterface $file, $file_limit = 0, $user_limit =
  * @see hook_file_validate()
  */
 function file_validate_is_image(FileInterface $file) {
-  $errors = array();
+  $errors = [];
 
   $image_factory = \Drupal::service('image.factory');
   $image = $image_factory->get($file->getFileUri());
   if (!$image->isValid()) {
     $supported_extensions = $image_factory->getSupportedExtensions();
-    $errors[] = t('Image type not supported. Allowed types: %types', array('%types' => implode(' ', $supported_extensions)));
+    $errors[] = t('Image type not supported. Allowed types: %types', ['%types' => implode(' ', $supported_extensions)]);
   }
 
   return $errors;
@@ -429,7 +429,7 @@ function file_validate_is_image(FileInterface $file) {
  * @see hook_file_validate()
  */
 function file_validate_image_resolution(FileInterface $file, $maximum_dimensions = 0, $minimum_dimensions = 0) {
-  $errors = array();
+  $errors = [];
 
   // Check first that the file is an image.
   $image_factory = \Drupal::service('image.factory');
@@ -443,13 +443,13 @@ function file_validate_image_resolution(FileInterface $file, $maximum_dimensions
         if ($image->scale($width, $height)) {
           $image->save();
           if (!empty($width) && !empty($height)) {
-            $message = t('The image was resized to fit within the maximum allowed dimensions of %dimensions pixels.', array('%dimensions' => $maximum_dimensions));
+            $message = t('The image was resized to fit within the maximum allowed dimensions of %dimensions pixels.', ['%dimensions' => $maximum_dimensions]);
           }
           elseif (empty($width)) {
-            $message = t('The image was resized to fit within the maximum allowed height of %height pixels.', array('%height' => $height));
+            $message = t('The image was resized to fit within the maximum allowed height of %height pixels.', ['%height' => $height]);
           }
           elseif (empty($height)) {
-            $message = t('The image was resized to fit within the maximum allowed width of %width pixels.', array('%width' => $width));
+            $message = t('The image was resized to fit within the maximum allowed width of %width pixels.', ['%width' => $width]);
           }
           drupal_set_message($message);
         }
@@ -463,7 +463,7 @@ function file_validate_image_resolution(FileInterface $file, $maximum_dimensions
       // Check that it is larger than the given dimensions.
       list($width, $height) = explode('x', $minimum_dimensions);
       if ($image->getWidth() < $width || $image->getHeight() < $height) {
-        $errors[] = t('The image is too small; the minimum dimensions are %dimensions pixels.', array('%dimensions' => $minimum_dimensions));
+        $errors[] = t('The image is too small; the minimum dimensions are %dimensions pixels.', ['%dimensions' => $minimum_dimensions]);
       }
     }
   }
@@ -503,7 +503,7 @@ function file_save_data($data, $destination = NULL, $replace = FILE_EXISTS_RENAM
     $destination = file_default_scheme() . '://';
   }
   if (!file_valid_uri($destination)) {
-    \Drupal::logger('file')->notice('The data could not be saved because the destination %destination is invalid. This may be caused by improper use of file_save_data() or a missing stream wrapper.', array('%destination' => $destination));
+    \Drupal::logger('file')->notice('The data could not be saved because the destination %destination is invalid. This may be caused by improper use of file_save_data() or a missing stream wrapper.', ['%destination' => $destination]);
     drupal_set_message(t('The data could not be saved because the destination is invalid. More information is available in the system log.'), 'error');
     return FALSE;
   }
@@ -519,7 +519,7 @@ function file_save_data($data, $destination = NULL, $replace = FILE_EXISTS_RENAM
     // @todo Do not create a new entity in order to update it. See
     //   https://www.drupal.org/node/2241865.
     if ($replace == FILE_EXISTS_REPLACE) {
-      $existing_files = entity_load_multiple_by_properties('file', array('uri' => $uri));
+      $existing_files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
       if (count($existing_files)) {
         $existing = reset($existing_files);
         $file->fid = $existing->id();
@@ -552,36 +552,36 @@ function file_save_data($data, $destination = NULL, $replace = FILE_EXISTS_RENAM
 function file_get_content_headers(FileInterface $file) {
   $type = Unicode::mimeHeaderEncode($file->getMimeType());
 
-  return array(
+  return [
     'Content-Type' => $type,
     'Content-Length' => $file->getSize(),
     'Cache-Control' => 'private',
-  );
+  ];
 }
 
 /**
  * Implements hook_theme().
  */
 function file_theme() {
-  return array(
+  return [
     // From file.module.
-    'file_link' => array(
-      'variables' => array('file' => NULL, 'description' => NULL, 'attributes' => array()),
-    ),
-    'file_managed_file' => array(
+    'file_link' => [
+      'variables' => ['file' => NULL, 'description' => NULL, 'attributes' => []],
+    ],
+    'file_managed_file' => [
       'render element' => 'element',
-    ),
+    ],
 
     // From file.field.inc.
-    'file_widget_multiple' => array(
+    'file_widget_multiple' => [
       'render element' => 'element',
       'file' => 'file.field.inc',
-    ),
-    'file_upload_help' => array(
-      'variables' => array('description' => NULL, 'upload_validators' => NULL, 'cardinality' => NULL),
+    ],
+    'file_upload_help' => [
+      'variables' => ['description' => NULL, 'upload_validators' => NULL, 'cardinality' => NULL],
       'file' => 'file.field.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -590,7 +590,7 @@ function file_theme() {
 function file_file_download($uri) {
   // Get the file record based on the URI. If not in the database just return.
   /** @var \Drupal\file\FileInterface[] $files */
-  $files = entity_load_multiple_by_properties('file', array('uri' => $uri));
+  $files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
   if (count($files)) {
     foreach ($files as $item) {
       // Since some database servers sometimes use a case-insensitive comparison
@@ -663,11 +663,11 @@ function file_cron() {
           $file->delete();
         }
         else {
-          \Drupal::logger('file system')->error('Could not delete temporary file "%path" during garbage collection', array('%path' => $file->getFileUri()));
+          \Drupal::logger('file system')->error('Could not delete temporary file "%path" during garbage collection', ['%path' => $file->getFileUri()]);
         }
       }
       else {
-        \Drupal::logger('file system')->info('Did not delete temporary file "%path" during garbage collection because it is in use by the following modules: %modules.', array('%path' => $file->getFileUri(), '%modules' => implode(', ', array_keys($references))));
+        \Drupal::logger('file system')->info('Did not delete temporary file "%path" during garbage collection because it is in use by the following modules: %modules.', ['%path' => $file->getFileUri(), '%modules' => implode(', ', array_keys($references))]);
       }
     }
   }
@@ -711,11 +711,11 @@ function file_cron() {
  *   array element contains the file entity if the upload succeeded or FALSE if
  *   there was an error. Function returns NULL if no file was uploaded.
  */
-function file_save_upload($form_field_name, $validators = array(), $destination = FALSE, $delta = NULL, $replace = FILE_EXISTS_RENAME) {
+function file_save_upload($form_field_name, $validators = [], $destination = FALSE, $delta = NULL, $replace = FILE_EXISTS_RENAME) {
   $user = \Drupal::currentUser();
   static $upload_cache;
 
-  $all_files = \Drupal::request()->files->get('files', array());
+  $all_files = \Drupal::request()->files->get('files', []);
   // Make sure there's an upload to process.
   if (empty($all_files[$form_field_name])) {
     return NULL;
@@ -735,10 +735,10 @@ function file_save_upload($form_field_name, $validators = array(), $destination
   // for multiple uploads and we fix that here.
   $uploaded_files = $file_upload;
   if (!is_array($file_upload)) {
-    $uploaded_files = array($file_upload);
+    $uploaded_files = [$file_upload];
   }
 
-  $files = array();
+  $files = [];
   foreach ($uploaded_files as $i => $file_info) {
     // Check for file upload errors and return FALSE for this file if a lower
     // level system error occurred. For a complete list of errors:
@@ -746,13 +746,13 @@ function file_save_upload($form_field_name, $validators = array(), $destination
     switch ($file_info->getError()) {
       case UPLOAD_ERR_INI_SIZE:
       case UPLOAD_ERR_FORM_SIZE:
-        drupal_set_message(t('The file %file could not be saved because it exceeds %maxsize, the maximum allowed size for uploads.', array('%file' => $file_info->getFilename(), '%maxsize' => format_size(file_upload_max_size()))), 'error');
+        drupal_set_message(t('The file %file could not be saved because it exceeds %maxsize, the maximum allowed size for uploads.', ['%file' => $file_info->getFilename(), '%maxsize' => format_size(file_upload_max_size())]), 'error');
         $files[$i] = FALSE;
         continue;
 
       case UPLOAD_ERR_PARTIAL:
       case UPLOAD_ERR_NO_FILE:
-        drupal_set_message(t('The file %file could not be saved because the upload did not complete.', array('%file' => $file_info->getFilename())), 'error');
+        drupal_set_message(t('The file %file could not be saved because the upload did not complete.', ['%file' => $file_info->getFilename()]), 'error');
         $files[$i] = FALSE;
         continue;
 
@@ -765,19 +765,19 @@ function file_save_upload($form_field_name, $validators = array(), $destination
 
         // Unknown error
       default:
-        drupal_set_message(t('The file %file could not be saved. An unknown error has occurred.', array('%file' => $file_info->getFilename())), 'error');
+        drupal_set_message(t('The file %file could not be saved. An unknown error has occurred.', ['%file' => $file_info->getFilename()]), 'error');
         $files[$i] = FALSE;
         continue;
 
     }
     // Begin building file entity.
-    $values = array(
+    $values = [
       'uid' => $user->id(),
       'status' => 0,
       'filename' => $file_info->getClientOriginalName(),
       'uri' => $file_info->getRealPath(),
       'filesize' => $file_info->getSize(),
-    );
+    ];
     $values['filemime'] = \Drupal::service('file.mime_type.guesser')->guess($values['filename']);
     $file = File::create($values);
 
@@ -798,7 +798,7 @@ function file_save_upload($form_field_name, $validators = array(), $destination
       // No validator was provided, so add one using the default list.
       // Build a default non-munged safe list for file_munge_filename().
       $extensions = 'jpg jpeg gif png txt doc xls pdf ppt pps odt ods odp';
-      $validators['file_validate_extensions'] = array();
+      $validators['file_validate_extensions'] = [];
       $validators['file_validate_extensions'][0] = $extensions;
     }
 
@@ -820,7 +820,7 @@ function file_save_upload($form_field_name, $validators = array(), $destination
       // to add it here or else the file upload will fail.
       if (!empty($extensions)) {
         $validators['file_validate_extensions'][0] .= ' txt';
-        drupal_set_message(t('For security reasons, your upload has been renamed to %filename.', array('%filename' => $file->getFilename())));
+        drupal_set_message(t('For security reasons, your upload has been renamed to %filename.', ['%filename' => $file->getFilename()]));
       }
     }
 
@@ -832,7 +832,7 @@ function file_save_upload($form_field_name, $validators = array(), $destination
     // Assert that the destination contains a valid stream.
     $destination_scheme = file_uri_scheme($destination);
     if (!file_stream_wrapper_valid_scheme($destination_scheme)) {
-      drupal_set_message(t('The file could not be uploaded because the destination %destination is invalid.', array('%destination' => $destination)), 'error');
+      drupal_set_message(t('The file could not be uploaded because the destination %destination is invalid.', ['%destination' => $destination]), 'error');
       $files[$i] = FALSE;
       continue;
     }
@@ -846,28 +846,28 @@ function file_save_upload($form_field_name, $validators = array(), $destination
     // If file_destination() returns FALSE then $replace === FILE_EXISTS_ERROR and
     // there's an existing file so we need to bail.
     if ($file->destination === FALSE) {
-      drupal_set_message(t('The file %source could not be uploaded because a file by that name already exists in the destination %directory.', array('%source' => $form_field_name, '%directory' => $destination)), 'error');
+      drupal_set_message(t('The file %source could not be uploaded because a file by that name already exists in the destination %directory.', ['%source' => $form_field_name, '%directory' => $destination]), 'error');
       $files[$i] = FALSE;
       continue;
     }
 
     // Add in our check of the file name length.
-    $validators['file_validate_name_length'] = array();
+    $validators['file_validate_name_length'] = [];
 
     // Call the validation functions specified by this function's caller.
     $errors = file_validate($file, $validators);
 
     // Check for errors.
     if (!empty($errors)) {
-      $message = array(
-        'error' => array(
-          '#markup' => t('The specified file %name could not be uploaded.', array('%name' => $file->getFilename())),
-        ),
-        'item_list' => array(
+      $message = [
+        'error' => [
+          '#markup' => t('The specified file %name could not be uploaded.', ['%name' => $file->getFilename()]),
+        ],
+        'item_list' => [
           '#theme' => 'item_list',
           '#items' => $errors,
-        ),
-      );
+        ],
+      ];
       // @todo Add support for render arrays in drupal_set_message()? See
       //  https://www.drupal.org/node/2505497.
       drupal_set_message(\Drupal::service('renderer')->renderPlain($message), 'error');
@@ -881,7 +881,7 @@ function file_save_upload($form_field_name, $validators = array(), $destination
     $file->setFileUri($file->destination);
     if (!drupal_move_uploaded_file($file_info->getRealPath(), $file->getFileUri())) {
       drupal_set_message(t('File upload error. Could not move uploaded file.'), 'error');
-      \Drupal::logger('file')->notice('Upload error. Could not move uploaded file %file to destination %destination.', array('%file' => $file->getFilename(), '%destination' => $file->getFileUri()));
+      \Drupal::logger('file')->notice('Upload error. Could not move uploaded file %file to destination %destination.', ['%file' => $file->getFilename(), '%destination' => $file->getFileUri()]);
       $files[$i] = FALSE;
       continue;
     }
@@ -893,7 +893,7 @@ function file_save_upload($form_field_name, $validators = array(), $destination
     // @todo Do not create a new entity in order to update it. See
     //   https://www.drupal.org/node/2241865.
     if ($replace == FILE_EXISTS_REPLACE) {
-      $existing_files = entity_load_multiple_by_properties('file', array('uri' => $file->getFileUri()));
+      $existing_files = entity_load_multiple_by_properties('file', ['uri' => $file->getFileUri()]);
       if (count($existing_files)) {
         $existing = reset($existing_files);
         $file->fid = $existing->id();
@@ -949,7 +949,7 @@ function file_file_predelete(File $file) {
 function file_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
   $token_service = \Drupal::token();
 
-  $url_options = array('absolute' => TRUE);
+  $url_options = ['absolute' => TRUE];
   if (isset($options['langcode'])) {
     $url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
     $langcode = $options['langcode'];
@@ -958,7 +958,7 @@ function file_tokens($type, $tokens, array $data, array $options, BubbleableMeta
     $langcode = NULL;
   }
 
-  $replacements = array();
+  $replacements = [];
 
   if ($type == 'file' && !empty($data['file'])) {
     /** @var \Drupal\file\FileInterface $file */
@@ -1020,15 +1020,15 @@ function file_tokens($type, $tokens, array $data, array $options, BubbleableMeta
     }
 
     if ($date_tokens = $token_service->findWithPrefix($tokens, 'created')) {
-      $replacements += $token_service->generate('date', $date_tokens, array('date' => $file->getCreatedTime()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $date_tokens, ['date' => $file->getCreatedTime()], $options, $bubbleable_metadata);
     }
 
     if ($date_tokens = $token_service->findWithPrefix($tokens, 'changed')) {
-      $replacements += $token_service->generate('date', $date_tokens, array('date' => $file->getChangedTime()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $date_tokens, ['date' => $file->getChangedTime()], $options, $bubbleable_metadata);
     }
 
     if (($owner_tokens = $token_service->findWithPrefix($tokens, 'owner')) && $file->getOwner()) {
-      $replacements += $token_service->generate('user', $owner_tokens, array('user' => $file->getOwner()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('user', $owner_tokens, ['user' => $file->getOwner()], $options, $bubbleable_metadata);
     }
   }
 
@@ -1039,59 +1039,59 @@ function file_tokens($type, $tokens, array $data, array $options, BubbleableMeta
  * Implements hook_token_info().
  */
 function file_token_info() {
-  $types['file'] = array(
+  $types['file'] = [
     'name' => t("Files"),
     'description' => t("Tokens related to uploaded files."),
     'needs-data' => 'file',
-  );
+  ];
 
   // File related tokens.
-  $file['fid'] = array(
+  $file['fid'] = [
     'name' => t("File ID"),
     'description' => t("The unique ID of the uploaded file."),
-  );
-  $file['name'] = array(
+  ];
+  $file['name'] = [
     'name' => t("File name"),
     'description' => t("The name of the file on disk."),
-  );
-  $file['path'] = array(
+  ];
+  $file['path'] = [
     'name' => t("Path"),
     'description' => t("The location of the file relative to Drupal root."),
-  );
-  $file['mime'] = array(
+  ];
+  $file['mime'] = [
     'name' => t("MIME type"),
     'description' => t("The MIME type of the file."),
-  );
-  $file['size'] = array(
+  ];
+  $file['size'] = [
     'name' => t("File size"),
     'description' => t("The size of the file."),
-  );
-  $file['url'] = array(
+  ];
+  $file['url'] = [
     'name' => t("URL"),
     'description' => t("The web-accessible URL for the file."),
-  );
-  $file['created'] = array(
+  ];
+  $file['created'] = [
     'name' => t("Created"),
     'description' => t("The date the file created."),
     'type' => 'date',
-  );
-  $file['changed'] = array(
+  ];
+  $file['changed'] = [
     'name' => t("Changed"),
     'description' => t("The date the file was most recently changed."),
     'type' => 'date',
-  );
-  $file['owner'] = array(
+  ];
+  $file['owner'] = [
     'name' => t("Owner"),
     'description' => t("The user who originally uploaded the file."),
     'type' => 'user',
-  );
+  ];
 
-  return array(
+  return [
     'types' => $types,
-    'tokens' => array(
+    'tokens' => [
       'file' => $file,
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -1115,7 +1115,7 @@ function file_managed_file_submit($form, FormStateInterface $form_state) {
     $fids = array_keys($element['#files']);
     // Get files that will be removed.
     if ($element['#multiple']) {
-      $remove_fids = array();
+      $remove_fids = [];
       foreach (Element::children($element) as $name) {
         if (strpos($name, 'file_') === 0 && $element[$name]['selected']['#value']) {
           $remove_fids[] = (int) substr($name, 5);
@@ -1128,7 +1128,7 @@ function file_managed_file_submit($form, FormStateInterface $form_state) {
       // element's value to empty array (file could not be removed from
       // element if we don't do that).
       $remove_fids = $fids;
-      $fids = array();
+      $fids = [];
     }
 
     foreach ($remove_fids as $fid) {
@@ -1175,7 +1175,7 @@ function file_managed_file_submit($form, FormStateInterface $form_state) {
  */
 function file_managed_file_save_upload($element, FormStateInterface $form_state) {
   $upload_name = implode('_', $element['#parents']);
-  $all_files = \Drupal::request()->files->get('files', array());
+  $all_files = \Drupal::request()->files->get('files', []);
   if (empty($all_files[$upload_name])) {
     return FALSE;
   }
@@ -1183,7 +1183,7 @@ function file_managed_file_save_upload($element, FormStateInterface $form_state)
 
   $destination = isset($element['#upload_location']) ? $element['#upload_location'] : NULL;
   if (isset($destination) && !file_prepare_directory($destination, FILE_CREATE_DIRECTORY)) {
-    \Drupal::logger('file')->notice('The upload directory %directory for the file field %name could not be created or is not accessible. A newly uploaded file could not be saved in this directory as a consequence, and the upload was canceled.', array('%directory' => $destination, '%name' => $element['#field_name']));
+    \Drupal::logger('file')->notice('The upload directory %directory for the file field %name could not be created or is not accessible. A newly uploaded file could not be saved in this directory as a consequence, and the upload was canceled.', ['%directory' => $destination, '%name' => $element['#field_name']]);
     $form_state->setError($element, t('The file could not be uploaded.'));
     return FALSE;
   }
@@ -1193,19 +1193,19 @@ function file_managed_file_save_upload($element, FormStateInterface $form_state)
   $files_uploaded |= !$element['#multiple'] && !empty($file_upload);
   if ($files_uploaded) {
     if (!$files = file_save_upload($upload_name, $element['#upload_validators'], $destination)) {
-      \Drupal::logger('file')->notice('The file upload failed. %upload', array('%upload' => $upload_name));
-      $form_state->setError($element, t('Files in the @name field were unable to be uploaded.', array('@name' => $element['#title'])));
-      return array();
+      \Drupal::logger('file')->notice('The file upload failed. %upload', ['%upload' => $upload_name]);
+      $form_state->setError($element, t('Files in the @name field were unable to be uploaded.', ['@name' => $element['#title']]));
+      return [];
     }
 
     // Value callback expects FIDs to be keys.
     $files = array_filter($files);
     $fids = array_map(function($file) { return $file->id(); }, $files);
 
-    return empty($files) ? array() : array_combine($fids, $files);
+    return empty($files) ? [] : array_combine($fids, $files);
   }
 
-  return array();
+  return [];
 }
 
 /**
@@ -1220,7 +1220,7 @@ function file_managed_file_save_upload($element, FormStateInterface $form_state)
 function template_preprocess_file_managed_file(&$variables) {
   $element = $variables['element'];
 
-  $variables['attributes'] = array();
+  $variables['attributes'] = [];
   if (isset($element['#id'])) {
     $variables['attributes']['id'] = $element['#id'];
   }
@@ -1244,7 +1244,7 @@ function template_preprocess_file_managed_file(&$variables) {
  */
 function template_preprocess_file_link(&$variables) {
   $file = $variables['file'];
-  $options = array();
+  $options = [];
 
   $file_entity = ($file instanceof File) ? $file : File::load($file->fid);
   // @todo Wrap in file_url_transform_relative(). This is currently
@@ -1270,13 +1270,13 @@ function template_preprocess_file_link(&$variables) {
   }
 
   // Classes to add to the file field for icons.
-  $classes = array(
+  $classes = [
     'file',
     // Add a specific class for each and every mime type.
-    'file--mime-' . strtr($mime_type, array('/' => '-', '.' => '-')),
+    'file--mime-' . strtr($mime_type, ['/' => '-', '.' => '-']),
     // Add a more general class for groups of well known MIME types.
     'file--' . file_icon_class($mime_type),
-  );
+  ];
 
   // Set file classes to the options array.
   $variables['attributes'] = new Attribute($variables['attributes']);
@@ -1302,7 +1302,7 @@ function file_icon_class($mime_type) {
   }
 
   // Use generic icons for each category that provides such icons.
-  foreach (array('audio', 'image', 'text', 'video') as $category) {
+  foreach (['audio', 'image', 'text', 'video'] as $category) {
     if (strpos($mime_type, $category) === 0) {
       return $category;
     }
@@ -1473,14 +1473,14 @@ function file_icon_map($mime_type) {
  * @ingroup file
  */
 function file_get_file_references(FileInterface $file, FieldDefinitionInterface $field = NULL, $age = EntityStorageInterface::FIELD_LOAD_REVISION, $field_type = 'file') {
-  $references = &drupal_static(__FUNCTION__, array());
-  $field_columns = &drupal_static(__FUNCTION__ . ':field_columns', array());
+  $references = &drupal_static(__FUNCTION__, []);
+  $field_columns = &drupal_static(__FUNCTION__ . ':field_columns', []);
 
   // Fill the static cache, disregard $field and $field_type for now.
   if (!isset($references[$file->id()][$age])) {
-    $references[$file->id()][$age] = array();
+    $references[$file->id()][$age] = [];
     $usage_list = \Drupal::service('file.usage')->listUsage($file);
-    $file_usage_list = isset($usage_list['file']) ? $usage_list['file'] : array();
+    $file_usage_list = isset($usage_list['file']) ? $usage_list['file'] : [];
     foreach ($file_usage_list as $entity_type_id => $entity_ids) {
       $entities = \Drupal::entityTypeManager()
         ->getStorage($entity_type_id)->loadMultiple(array_keys($entity_ids));
@@ -1488,7 +1488,7 @@ function file_get_file_references(FileInterface $file, FieldDefinitionInterface
         $bundle = $entity->bundle();
         // We need to find file fields for this entity type and bundle.
         if (!isset($file_fields[$entity_type_id][$bundle])) {
-          $file_fields[$entity_type_id][$bundle] = array();
+          $file_fields[$entity_type_id][$bundle] = [];
           // This contains the possible field names.
           foreach ($entity->getFieldDefinitions() as $field_name => $field_definition) {
             // If this is the first time this field type is seen, check
@@ -1549,10 +1549,10 @@ function file_get_file_references(FileInterface $file, FieldDefinitionInterface
  *   An array of file statuses or a specified status if $choice is set.
  */
 function _views_file_status($choice = NULL) {
-  $status = array(
+  $status = [
     0 => t('Temporary'),
     FILE_STATUS_PERMANENT => t('Permanent'),
-  );
+  ];
 
   if (isset($choice)) {
     return isset($status[$choice]) ? $status[$choice] : t('Unknown');
diff --git a/core/modules/file/file.views.inc b/core/modules/file/file.views.inc
index 7fb54b61362cb3722a1ad48214868aae0b4c223e..8e45101bd84ab3be5e74acc68a8929647fe63b54 100644
--- a/core/modules/file/file.views.inc
+++ b/core/modules/file/file.views.inc
@@ -19,13 +19,13 @@ function file_field_views_data(FieldStorageConfigInterface $field_storage) {
   $data = views_field_default_views_data($field_storage);
   foreach ($data as $table_name => $table_data) {
     // Add the relationship only on the fid field.
-    $data[$table_name][$field_storage->getName() . '_target_id']['relationship'] = array(
+    $data[$table_name][$field_storage->getName() . '_target_id']['relationship'] = [
       'id' => 'standard',
       'base' => 'file_managed',
       'entity type' => 'file',
       'base field' => 'fid',
-      'label' => t('file from @field_name', array('@field_name' => $field_storage->getName())),
-    );
+      'label' => t('file from @field_name', ['@field_name' => $field_storage->getName()]),
+    ];
   }
 
   return $data;
@@ -47,11 +47,11 @@ function file_field_views_data_views_data_alter(array &$data, FieldStorageConfig
 
   list($label) = views_entity_field_label($entity_type_id, $field_name);
 
-  $data['file_managed'][$pseudo_field_name]['relationship'] = array(
-    'title' => t('@entity using @field', array('@entity' => $entity_type->getLabel(), '@field' => $label)),
-    'label' => t('@field_name', array('@field_name' => $field_name)),
+  $data['file_managed'][$pseudo_field_name]['relationship'] = [
+    'title' => t('@entity using @field', ['@entity' => $entity_type->getLabel(), '@field' => $label]),
+    'label' => t('@field_name', ['@field_name' => $field_name]),
     'group' => $entity_type->getLabel(),
-    'help' => t('Relate each @entity with a @field set to the file.', array('@entity' => $entity_type->getLabel(), '@field' => $label)),
+    'help' => t('Relate each @entity with a @field set to the file.', ['@entity' => $entity_type->getLabel(), '@field' => $label]),
     'id' => 'entity_reverse',
     'base' => $entity_type->getDataTable() ?: $entity_type->getBaseTable(),
     'entity_type' => $entity_type_id,
@@ -59,12 +59,12 @@ function file_field_views_data_views_data_alter(array &$data, FieldStorageConfig
     'field_name' => $field_name,
     'field table' => $table_mapping->getDedicatedDataTableName($field_storage),
     'field field' => $field_name . '_target_id',
-    'join_extra' => array(
-      0 => array(
+    'join_extra' => [
+      0 => [
         'field' => 'deleted',
         'value' => 0,
         'numeric' => TRUE,
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
diff --git a/core/modules/file/src/Controller/FileWidgetAjaxController.php b/core/modules/file/src/Controller/FileWidgetAjaxController.php
index d5c6874528e736f60281b8a738fbce3e93ddb7f8..c958750443078d68f59232c052c5b581e3cee4c9 100644
--- a/core/modules/file/src/Controller/FileWidgetAjaxController.php
+++ b/core/modules/file/src/Controller/FileWidgetAjaxController.php
@@ -19,23 +19,23 @@ class FileWidgetAjaxController {
    *   A JsonResponse object.
    */
   public function progress($key) {
-    $progress = array(
+    $progress = [
       'message' => t('Starting upload...'),
       'percentage' => -1,
-    );
+    ];
 
     $implementation = file_progress_implementation();
     if ($implementation == 'uploadprogress') {
       $status = uploadprogress_get_info($key);
       if (isset($status['bytes_uploaded']) && !empty($status['bytes_total'])) {
-        $progress['message'] = t('Uploading... (@current of @total)', array('@current' => format_size($status['bytes_uploaded']), '@total' => format_size($status['bytes_total'])));
+        $progress['message'] = t('Uploading... (@current of @total)', ['@current' => format_size($status['bytes_uploaded']), '@total' => format_size($status['bytes_total'])]);
         $progress['percentage'] = round(100 * $status['bytes_uploaded'] / $status['bytes_total']);
       }
     }
     elseif ($implementation == 'apc') {
       $status = apcu_fetch('upload_' . $key);
       if (isset($status['current']) && !empty($status['total'])) {
-        $progress['message'] = t('Uploading... (@current of @total)', array('@current' => format_size($status['current']), '@total' => format_size($status['total'])));
+        $progress['message'] = t('Uploading... (@current of @total)', ['@current' => format_size($status['current']), '@total' => format_size($status['total'])]);
         $progress['percentage'] = round(100 * $status['current'] / $status['total']);
       }
     }
diff --git a/core/modules/file/src/Element/ManagedFile.php b/core/modules/file/src/Element/ManagedFile.php
index f465b181ac325a2330e3b1af98919bde66beaf25..45c8aa7cec53c1814415d7cb134ce7d7030b13f6 100644
--- a/core/modules/file/src/Element/ManagedFile.php
+++ b/core/modules/file/src/Element/ManagedFile.php
@@ -108,7 +108,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
                 // submissions of the same form, so to allow that, check for the
                 // token added by $this->processManagedFile().
                 elseif (\Drupal::currentUser()->isAnonymous()) {
-                  $token = NestedArray::getValue($form_state->getUserInput(), array_merge($element['#parents'], array('file_' . $file->id(), 'fid_token')));
+                  $token = NestedArray::getValue($form_state->getUserInput(), array_merge($element['#parents'], ['file_' . $file->id(), 'fid_token']));
                   if ($token !== Crypt::hmacBase64('file-' . $file->id(), \Drupal::service('private_key')->get() . Settings::getHashSalt())) {
                     $force_default = TRUE;
                     break;
@@ -334,10 +334,10 @@ public static function processManagedFile(&$element, FormStateInterface $form_st
         // of the same form (for example, after an Ajax upload or form
         // validation error).
         if ($file->isTemporary() && \Drupal::currentUser()->isAnonymous()) {
-          $element['file_' . $delta]['fid_token'] = array(
+          $element['file_' . $delta]['fid_token'] = [
             '#type' => 'hidden',
             '#value' => Crypt::hmacBase64('file-' . $delta, \Drupal::service('private_key')->get() . Settings::getHashSalt()),
-          );
+          ];
         }
       }
     }
diff --git a/core/modules/file/src/Entity/File.php b/core/modules/file/src/Entity/File.php
index cd7a65897f720017bf2ceec7a4f1dc538de3406c..a68b9bae9bcf5ef87098a9a592aae15ddea7302c 100644
--- a/core/modules/file/src/Entity/File.php
+++ b/core/modules/file/src/Entity/File.php
@@ -70,7 +70,7 @@ public function setFileUri($uri) {
    *
    * @see file_url_transform_relative()
    */
-  public function url($rel = 'canonical', $options = array()) {
+  public function url($rel = 'canonical', $options = []) {
     return file_create_url($this->getFileUri());
   }
 
diff --git a/core/modules/file/src/FileUsage/DatabaseFileUsageBackend.php b/core/modules/file/src/FileUsage/DatabaseFileUsageBackend.php
index 12647b112f3f75ef0c36482692349812a0f76004..cfb0c447a685b5d0fd82887748ee054d9957326c 100644
--- a/core/modules/file/src/FileUsage/DatabaseFileUsageBackend.php
+++ b/core/modules/file/src/FileUsage/DatabaseFileUsageBackend.php
@@ -44,14 +44,14 @@ public function __construct(Connection $connection, $table = 'file_usage') {
    */
   public function add(FileInterface $file, $module, $type, $id, $count = 1) {
     $this->connection->merge($this->tableName)
-      ->keys(array(
+      ->keys([
         'fid' => $file->id(),
         'module' => $module,
         'type' => $type,
         'id' => $id,
-      ))
-      ->fields(array('count' => $count))
-      ->expression('count', 'count + :count', array(':count' => $count))
+      ])
+      ->fields(['count' => $count])
+      ->expression('count', 'count + :count', [':count' => $count])
       ->execute();
 
     parent::add($file, $module, $type, $id, $count);
@@ -85,7 +85,7 @@ public function delete(FileInterface $file, $module, $type = NULL, $id = NULL, $
           ->condition('type', $type)
           ->condition('id', $id);
       }
-      $query->expression('count', 'count - :count', array(':count' => $count));
+      $query->expression('count', 'count - :count', [':count' => $count]);
       $query->execute();
     }
 
@@ -97,11 +97,11 @@ public function delete(FileInterface $file, $module, $type = NULL, $id = NULL, $
    */
   public function listUsage(FileInterface $file) {
     $result = $this->connection->select($this->tableName, 'f')
-      ->fields('f', array('module', 'type', 'id', 'count'))
+      ->fields('f', ['module', 'type', 'id', 'count'])
       ->condition('fid', $file->id())
       ->condition('count', 0, '>')
       ->execute();
-    $references = array();
+    $references = [];
     foreach ($result as $usage) {
       $references[$usage->module][$usage->type][$usage->id] = $usage->count;
     }
diff --git a/core/modules/file/src/FileViewsData.php b/core/modules/file/src/FileViewsData.php
index cf24062254130528ce9239121001f3d552a5fcc4..459a37eba30d0321b1b258111a7c31a946e2a275 100644
--- a/core/modules/file/src/FileViewsData.php
+++ b/core/modules/file/src/FileViewsData.php
@@ -20,13 +20,13 @@ public function getViewsData() {
     $data['file_managed']['table']['base']['defaults']['field'] = 'filename';
     $data['file_managed']['table']['wizard_id'] = 'file_managed';
 
-    $data['file_managed']['fid']['argument'] = array(
+    $data['file_managed']['fid']['argument'] = [
       'id' => 'file_fid',
       // The field to display in the summary.
       'name field' => 'filename',
       'numeric' => TRUE,
-    );
-    $data['file_managed']['fid']['relationship'] = array(
+    ];
+    $data['file_managed']['fid']['relationship'] = [
       'title' => $this->t('File usage'),
       'help' => $this->t('Relate file entities to their usage.'),
       'id' => 'standard',
@@ -34,24 +34,24 @@ public function getViewsData() {
       'base field' => 'fid',
       'field' => 'fid',
       'label' => $this->t('File usage'),
-    );
+    ];
 
     $data['file_managed']['uri']['field']['default_formatter'] = 'file_uri';
 
     $data['file_managed']['filemime']['field']['default_formatter'] = 'file_filemime';
 
-    $data['file_managed']['extension'] = array(
+    $data['file_managed']['extension'] = [
       'title' => $this->t('Extension'),
       'help' => $this->t('The extension of the file.'),
       'real field' => 'filename',
-      'field' => array(
+      'field' => [
         'entity_type' => 'file',
         'field_name' => 'filename',
         'default_formatter' => 'file_extension',
         'id' => 'field',
         'click sortable' => FALSE,
-       ),
-    );
+       ],
+    ];
 
     $data['file_managed']['filesize']['field']['default_formatter'] = 'file_size';
 
@@ -71,40 +71,40 @@ public function getViewsData() {
     // ("file_managed") so that we can create relationships from files to
     // entities, and then on each core entity type base table so that we can
     // provide general relationships between entities and files.
-    $data['file_usage']['table']['join'] = array(
-      'file_managed' => array(
+    $data['file_usage']['table']['join'] = [
+      'file_managed' => [
         'field' => 'fid',
         'left_field' => 'fid',
-      ),
+      ],
       // Link ourselves to the {node_field_data} table
       // so we can provide node->file relationships.
-      'node_field_data' => array(
+      'node_field_data' => [
         'field' => 'id',
         'left_field' => 'nid',
-        'extra' => array(array('field' => 'type', 'value' => 'node')),
-      ),
+        'extra' => [['field' => 'type', 'value' => 'node']],
+      ],
       // Link ourselves to the {users_field_data} table
       // so we can provide user->file relationships.
-      'users_field_data' => array(
+      'users_field_data' => [
         'field' => 'id',
         'left_field' => 'uid',
-        'extra' => array(array('field' => 'type', 'value' => 'user')),
-      ),
+        'extra' => [['field' => 'type', 'value' => 'user']],
+      ],
       // Link ourselves to the {comment_field_data} table
       // so we can provide comment->file relationships.
-      'comment' => array(
+      'comment' => [
         'field' => 'id',
         'left_field' => 'cid',
-        'extra' => array(array('field' => 'type', 'value' => 'comment')),
-      ),
+        'extra' => [['field' => 'type', 'value' => 'comment']],
+      ],
       // Link ourselves to the {taxonomy_term_field_data} table
       // so we can provide taxonomy_term->file relationships.
-      'taxonomy_term_data' => array(
+      'taxonomy_term_data' => [
         'field' => 'id',
         'left_field' => 'tid',
-        'extra' => array(array('field' => 'type', 'value' => 'taxonomy_term')),
-      ),
-    );
+        'extra' => [['field' => 'type', 'value' => 'taxonomy_term']],
+      ],
+    ];
 
     // Provide a relationship between the files table and each entity type,
     // and between each entity type and the files table. Entity->file
@@ -113,210 +113,210 @@ public function getViewsData() {
     // declarations below.
 
     // Describes relationships between files and nodes.
-    $data['file_usage']['file_to_node'] = array(
+    $data['file_usage']['file_to_node'] = [
       'title' => $this->t('Content'),
       'help' => $this->t('Content that is associated with this file, usually because this file is in a field on the content.'),
       // Only provide this field/relationship/etc.,
       // when the 'file_managed' base table is present.
-      'skip base' => array('node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'),
+      'skip base' => ['node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'id',
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('Content'),
         'label' => $this->t('Content'),
         'base' => 'node_field_data',
         'base field' => 'nid',
         'relationship field' => 'id',
-        'extra' => array(array('table' => 'file_usage', 'field' => 'type', 'operator' => '=', 'value' => 'node')),
-      ),
-    );
-    $data['file_usage']['node_to_file'] = array(
+        'extra' => [['table' => 'file_usage', 'field' => 'type', 'operator' => '=', 'value' => 'node']],
+      ],
+    ];
+    $data['file_usage']['node_to_file'] = [
       'title' => $this->t('File'),
       'help' => $this->t('A file that is associated with this node, usually because it is in a field on the node.'),
       // Only provide this field/relationship/etc.,
       // when the 'node' base table is present.
-      'skip base' => array('file_managed', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'),
+      'skip base' => ['file_managed', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'fid',
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('File'),
         'label' => $this->t('File'),
         'base' => 'file_managed',
         'base field' => 'fid',
         'relationship field' => 'fid',
-      ),
-    );
+      ],
+    ];
 
     // Describes relationships between files and users.
-    $data['file_usage']['file_to_user'] = array(
+    $data['file_usage']['file_to_user'] = [
       'title' => $this->t('User'),
       'help' => $this->t('A user that is associated with this file, usually because this file is in a field on the user.'),
       // Only provide this field/relationship/etc.,
       // when the 'file_managed' base table is present.
-      'skip base' => array('node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'),
+      'skip base' => ['node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'id',
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('User'),
         'label' => $this->t('User'),
         'base' => 'users',
         'base field' => 'uid',
         'relationship field' => 'id',
-        'extra' => array(array('table' => 'file_usage', 'field' => 'type', 'operator' => '=', 'value' => 'user')),
-      ),
-    );
-    $data['file_usage']['user_to_file'] = array(
+        'extra' => [['table' => 'file_usage', 'field' => 'type', 'operator' => '=', 'value' => 'user']],
+      ],
+    ];
+    $data['file_usage']['user_to_file'] = [
       'title' => $this->t('File'),
       'help' => $this->t('A file that is associated with this user, usually because it is in a field on the user.'),
       // Only provide this field/relationship/etc.,
       // when the 'users' base table is present.
-      'skip base' => array('file_managed', 'node_field_data', 'node_field_revision', 'comment_field_data', 'taxonomy_term_field_data'),
+      'skip base' => ['file_managed', 'node_field_data', 'node_field_revision', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'fid',
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('File'),
         'label' => $this->t('File'),
         'base' => 'file_managed',
         'base field' => 'fid',
         'relationship field' => 'fid',
-      ),
-    );
+      ],
+    ];
 
     // Describes relationships between files and comments.
-    $data['file_usage']['file_to_comment'] = array(
+    $data['file_usage']['file_to_comment'] = [
       'title' => $this->t('Comment'),
       'help' => $this->t('A comment that is associated with this file, usually because this file is in a field on the comment.'),
       // Only provide this field/relationship/etc.,
       // when the 'file_managed' base table is present.
-      'skip base' => array('node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'),
+      'skip base' => ['node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'id',
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('Comment'),
         'label' => $this->t('Comment'),
         'base' => 'comment_field_data',
         'base field' => 'cid',
         'relationship field' => 'id',
-        'extra' => array(array('table' => 'file_usage', 'field' => 'type', 'operator' => '=', 'value' => 'comment')),
-      ),
-    );
-    $data['file_usage']['comment_to_file'] = array(
+        'extra' => [['table' => 'file_usage', 'field' => 'type', 'operator' => '=', 'value' => 'comment']],
+      ],
+    ];
+    $data['file_usage']['comment_to_file'] = [
       'title' => $this->t('File'),
       'help' => $this->t('A file that is associated with this comment, usually because it is in a field on the comment.'),
       // Only provide this field/relationship/etc.,
       // when the 'comment' base table is present.
-      'skip base' => array('file_managed', 'node_field_data', 'node_field_revision', 'users_field_data', 'taxonomy_term_field_data'),
+      'skip base' => ['file_managed', 'node_field_data', 'node_field_revision', 'users_field_data', 'taxonomy_term_field_data'],
       'real field' => 'fid',
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('File'),
         'label' => $this->t('File'),
         'base' => 'file_managed',
         'base field' => 'fid',
         'relationship field' => 'fid',
-      ),
-    );
+      ],
+    ];
 
     // Describes relationships between files and taxonomy_terms.
-    $data['file_usage']['file_to_taxonomy_term'] = array(
+    $data['file_usage']['file_to_taxonomy_term'] = [
       'title' => $this->t('Taxonomy Term'),
       'help' => $this->t('A taxonomy term that is associated with this file, usually because this file is in a field on the taxonomy term.'),
       // Only provide this field/relationship/etc.,
       // when the 'file_managed' base table is present.
-      'skip base' => array('node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'),
+      'skip base' => ['node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'id',
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('Taxonomy Term'),
         'label' => $this->t('Taxonomy Term'),
         'base' => 'taxonomy_term_data',
         'base field' => 'tid',
         'relationship field' => 'id',
-        'extra' => array(array('table' => 'file_usage', 'field' => 'type', 'operator' => '=', 'value' => 'taxonomy_term')),
-      ),
-    );
-    $data['file_usage']['taxonomy_term_to_file'] = array(
+        'extra' => [['table' => 'file_usage', 'field' => 'type', 'operator' => '=', 'value' => 'taxonomy_term']],
+      ],
+    ];
+    $data['file_usage']['taxonomy_term_to_file'] = [
       'title' => $this->t('File'),
       'help' => $this->t('A file that is associated with this taxonomy term, usually because it is in a field on the taxonomy term.'),
       // Only provide this field/relationship/etc.,
       // when the 'taxonomy_term_data' base table is present.
-      'skip base' => array('file_managed', 'node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data'),
+      'skip base' => ['file_managed', 'node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data'],
       'real field' => 'fid',
-      'relationship' => array(
+      'relationship' => [
         'title' => $this->t('File'),
         'label' => $this->t('File'),
         'base' => 'file_managed',
         'base field' => 'fid',
         'relationship field' => 'fid',
-      ),
-    );
+      ],
+    ];
 
     // Provide basic fields from the {file_usage} table to all of the base tables
     // we've declared joins to, because there is no 'skip base' property on these
     // fields.
-    $data['file_usage']['module'] = array(
+    $data['file_usage']['module'] = [
       'title' => $this->t('Module'),
       'help' => $this->t('The module managing this file relationship.'),
-      'field' => array(
+      'field' => [
         'id' => 'standard',
-       ),
-      'filter' => array(
+       ],
+      'filter' => [
         'id' => 'string',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'string',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['file_usage']['type'] = array(
+      ],
+    ];
+    $data['file_usage']['type'] = [
       'title' => $this->t('Entity type'),
       'help' => $this->t('The type of entity that is related to the file.'),
-      'field' => array(
+      'field' => [
         'id' => 'standard',
-       ),
-      'filter' => array(
+       ],
+      'filter' => [
         'id' => 'string',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'string',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['file_usage']['id'] = array(
+      ],
+    ];
+    $data['file_usage']['id'] = [
       'title' => $this->t('Entity ID'),
       'help' => $this->t('The ID of the entity that is related to the file.'),
-      'field' => array(
+      'field' => [
         'id' => 'numeric',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'numeric',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'numeric',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['file_usage']['count'] = array(
+      ],
+    ];
+    $data['file_usage']['count'] = [
       'title' => $this->t('Use count'),
       'help' => $this->t('The number of times the file is used by this entity.'),
-      'field' => array(
+      'field' => [
         'id' => 'numeric',
-       ),
-      'filter' => array(
+       ],
+      'filter' => [
         'id' => 'numeric',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['file_usage']['entity_label'] = array(
+      ],
+    ];
+    $data['file_usage']['entity_label'] = [
       'title' => $this->t('Entity label'),
       'help' => $this->t('The label of the entity that is related to the file.'),
       'real field' => 'id',
-      'field' => array(
+      'field' => [
         'id' => 'entity_label',
         'entity type field' => 'type',
-      ),
-    );
+      ],
+    ];
 
     return $data;
   }
diff --git a/core/modules/file/src/Plugin/Field/FieldFormatter/FileExtensionFormatter.php b/core/modules/file/src/Plugin/Field/FieldFormatter/FileExtensionFormatter.php
index bb6a770ca604bb5f5f19e99ad72b3385f0100b1d..afe1b7efc0a7b226c1b22c7dd9e49733039213e1 100644
--- a/core/modules/file/src/Plugin/Field/FieldFormatter/FileExtensionFormatter.php
+++ b/core/modules/file/src/Plugin/Field/FieldFormatter/FileExtensionFormatter.php
@@ -34,12 +34,12 @@ public static function defaultSettings() {
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $form = parent::settingsForm($form, $form_state);
-    $form['extension_detect_tar'] = array(
+    $form['extension_detect_tar'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Include tar in extension'),
       '#description' => $this->t("If the part of the filename just before the extension is '.tar', include this in the extension output."),
       '#default_value' => $this->getSetting('extension_detect_tar'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/file/src/Plugin/Field/FieldFormatter/FilemimeFormatter.php b/core/modules/file/src/Plugin/Field/FieldFormatter/FilemimeFormatter.php
index 6103239b6e8ef7055d1ded6d810d10c503d818b8..631d94140edc41ee741d9ae1c86a71c9e3ded7ed 100644
--- a/core/modules/file/src/Plugin/Field/FieldFormatter/FilemimeFormatter.php
+++ b/core/modules/file/src/Plugin/Field/FieldFormatter/FilemimeFormatter.php
@@ -43,12 +43,12 @@ public static function defaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $form = parent::settingsForm($form, $form_state);
 
-    $form['filemime_image'] = array(
+    $form['filemime_image'] = [
       '#title' => $this->t('Display an icon'),
       '#description' => $this->t('The icon is representing the file type, instead of the MIME text (such as "image/jpeg")'),
       '#type' => 'checkbox',
       '#default_value' => $this->getSetting('filemime_image'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/file/src/Plugin/Field/FieldFormatter/GenericFileFormatter.php b/core/modules/file/src/Plugin/Field/FieldFormatter/GenericFileFormatter.php
index a76d75a07afdecdc810c4102551603316637aa78..daeb9f42c22a1de1a2f07e12fa5ba174dcc36133 100644
--- a/core/modules/file/src/Plugin/Field/FieldFormatter/GenericFileFormatter.php
+++ b/core/modules/file/src/Plugin/Field/FieldFormatter/GenericFileFormatter.php
@@ -21,21 +21,21 @@ class GenericFileFormatter extends FileFormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($this->getEntitiesToView($items, $langcode) as $delta => $file) {
       $item = $file->_referringItem;
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#theme' => 'file_link',
         '#file' => $file,
         '#description' => $item->description,
-        '#cache' => array(
+        '#cache' => [
           'tags' => $file->getCacheTags(),
-        ),
-      );
+        ],
+      ];
       // Pass field item attributes to the theme function.
       if (isset($item->_attributes)) {
-        $elements[$delta] += array('#attributes' => array());
+        $elements[$delta] += ['#attributes' => []];
         $elements[$delta]['#attributes'] += $item->_attributes;
         // Unset field item attributes since they have been included in the
         // formatter output and should not be rendered in the field template.
diff --git a/core/modules/file/src/Plugin/Field/FieldFormatter/RSSEnclosureFormatter.php b/core/modules/file/src/Plugin/Field/FieldFormatter/RSSEnclosureFormatter.php
index 46bbbde569a459fe901986c41ae2ed7d97794315..a433d99b16e7a116102a41f9460ef486084fd960 100644
--- a/core/modules/file/src/Plugin/Field/FieldFormatter/RSSEnclosureFormatter.php
+++ b/core/modules/file/src/Plugin/Field/FieldFormatter/RSSEnclosureFormatter.php
@@ -25,17 +25,17 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
     // Add the first file as an enclosure to the RSS item. RSS allows only one
     // enclosure per item. See: http://wikipedia.org/wiki/RSS_enclosure
     foreach ($this->getEntitiesToView($items, $langcode) as $delta => $file) {
-      $entity->rss_elements[] = array(
+      $entity->rss_elements[] = [
         'key' => 'enclosure',
-        'attributes' => array(
+        'attributes' => [
           // In RSS feeds, it is necessary to use absolute URLs. The 'url.site'
           // cache context is already associated with RSS feed responses, so it
           // does not need to be specified here.
           'url' => file_create_url($file->getFileUri()),
           'length' => $file->getSize(),
           'type' => $file->getMimeType(),
-        ),
-      );
+        ],
+      ];
     }
     return [];
   }
diff --git a/core/modules/file/src/Plugin/Field/FieldFormatter/TableFormatter.php b/core/modules/file/src/Plugin/Field/FieldFormatter/TableFormatter.php
index 939329a595fcb13009610c62008eeba9d6ee1bb9..4da9e84366f44cc44f31d1696478ebf0947ed1a2 100644
--- a/core/modules/file/src/Plugin/Field/FieldFormatter/TableFormatter.php
+++ b/core/modules/file/src/Plugin/Field/FieldFormatter/TableFormatter.php
@@ -21,33 +21,33 @@ class TableFormatter extends FileFormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     if ($files = $this->getEntitiesToView($items, $langcode)) {
-      $header = array(t('Attachment'), t('Size'));
-      $rows = array();
+      $header = [t('Attachment'), t('Size')];
+      $rows = [];
       foreach ($files as $delta => $file) {
-        $rows[] = array(
-          array(
-            'data' => array(
+        $rows[] = [
+          [
+            'data' => [
               '#theme' => 'file_link',
               '#file' => $file,
-              '#cache' => array(
+              '#cache' => [
                 'tags' => $file->getCacheTags(),
-              ),
-            ),
-          ),
-          array('data' => format_size($file->getSize())),
-        );
+              ],
+            ],
+          ],
+          ['data' => format_size($file->getSize())],
+        ];
       }
 
-      $elements[0] = array();
+      $elements[0] = [];
       if (!empty($rows)) {
-        $elements[0] = array(
+        $elements[0] = [
           '#theme' => 'table__file_formatter_table',
           '#header' => $header,
           '#rows' => $rows,
-        );
+        ];
       }
     }
 
diff --git a/core/modules/file/src/Plugin/Field/FieldFormatter/UrlPlainFormatter.php b/core/modules/file/src/Plugin/Field/FieldFormatter/UrlPlainFormatter.php
index ccb97d5ef5d51510b4c4c9af060b5c12b892137a..d5e2a7c70a05df1ea84d64552d50adebe5c83252 100644
--- a/core/modules/file/src/Plugin/Field/FieldFormatter/UrlPlainFormatter.php
+++ b/core/modules/file/src/Plugin/Field/FieldFormatter/UrlPlainFormatter.php
@@ -21,15 +21,15 @@ class UrlPlainFormatter extends FileFormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($this->getEntitiesToView($items, $langcode) as $delta => $file) {
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#markup' => file_url_transform_relative(file_create_url($file->getFileUri())),
-        '#cache' => array(
+        '#cache' => [
           'tags' => $file->getCacheTags(),
-        ),
-      );
+        ],
+      ];
     }
 
     return $elements;
diff --git a/core/modules/file/src/Plugin/Field/FieldType/FileFieldItemList.php b/core/modules/file/src/Plugin/Field/FieldType/FileFieldItemList.php
index 20f47975025ee853ac2b12d65101ca2188a2e311..9a4dc8339b7f36e218cf79cf4ee74d508f24b0e4 100644
--- a/core/modules/file/src/Plugin/Field/FieldType/FileFieldItemList.php
+++ b/core/modules/file/src/Plugin/Field/FieldType/FileFieldItemList.php
@@ -30,7 +30,7 @@ public function postSave($update) {
     else {
       // Get current target file entities and file IDs.
       $files = $this->referencedEntities();
-      $ids = array();
+      $ids = [];
 
       /** @var \Drupal\file\FileInterface $file */
       foreach ($files as $file) {
@@ -48,7 +48,7 @@ public function postSave($update) {
 
       // Get the file IDs attached to the field before this update.
       $field_name = $this->getFieldDefinition()->getName();
-      $original_ids = array();
+      $original_ids = [];
       $langcode = $this->getLangcode();
       $original = $entity->original;
       if ($original->hasTranslation($langcode)) {
diff --git a/core/modules/file/src/Plugin/Field/FieldType/FileItem.php b/core/modules/file/src/Plugin/Field/FieldType/FileItem.php
index 5ea2692ea1a1a64b423347e6739a1a8b288c7083..7373c4397fe03919eeccbc8a4da6329116fffc1f 100644
--- a/core/modules/file/src/Plugin/Field/FieldType/FileItem.php
+++ b/core/modules/file/src/Plugin/Field/FieldType/FileItem.php
@@ -32,59 +32,59 @@ class FileItem extends EntityReferenceItem {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'target_type' => 'file',
       'display_field' => FALSE,
       'display_default' => FALSE,
       'uri_scheme' => file_default_scheme(),
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'file_extensions' => 'txt',
       'file_directory' => '[date:custom:Y]-[date:custom:m]',
       'max_filesize' => '',
       'description_field' => 0,
-    ) + parent::defaultFieldSettings();
+    ] + parent::defaultFieldSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'target_id' => array(
+    return [
+      'columns' => [
+        'target_id' => [
           'description' => 'The ID of the file entity.',
           'type' => 'int',
           'unsigned' => TRUE,
-        ),
-        'display' => array(
+        ],
+        'display' => [
           'description' => 'Flag to control whether this file should be displayed when viewing content.',
           'type' => 'int',
           'size' => 'tiny',
           'unsigned' => TRUE,
           'default' => 1,
-        ),
-        'description' => array(
+        ],
+        'description' => [
           'description' => 'A description of the file.',
           'type' => 'text',
-        ),
-      ),
-      'indexes' => array(
-        'target_id' => array('target_id'),
-      ),
-      'foreign keys' => array(
-        'target_id' => array(
+        ],
+      ],
+      'indexes' => [
+        'target_id' => ['target_id'],
+      ],
+      'foreign keys' => [
+        'target_id' => [
           'table' => 'file_managed',
-          'columns' => array('target_id' => 'fid'),
-        ),
-      ),
-    );
+          'columns' => ['target_id' => 'fid'],
+        ],
+      ],
+    ];
   }
 
   /**
@@ -107,37 +107,37 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $element = array();
+    $element = [];
 
     $element['#attached']['library'][] = 'file/drupal.file';
 
-    $element['display_field'] = array(
+    $element['display_field'] = [
       '#type' => 'checkbox',
       '#title' => t('Enable <em>Display</em> field'),
       '#default_value' => $this->getSetting('display_field'),
       '#description' => t('The display option allows users to choose if a file should be shown when viewing the content.'),
-    );
-    $element['display_default'] = array(
+    ];
+    $element['display_default'] = [
       '#type' => 'checkbox',
       '#title' => t('Files displayed by default'),
       '#default_value' => $this->getSetting('display_default'),
       '#description' => t('This setting only has an effect if the display option is enabled.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="settings[display_field]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="settings[display_field]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
 
     $scheme_options = \Drupal::service('stream_wrapper_manager')->getNames(StreamWrapperInterface::WRITE_VISIBLE);
-    $element['uri_scheme'] = array(
+    $element['uri_scheme'] = [
       '#type' => 'radios',
       '#title' => t('Upload destination'),
       '#options' => $scheme_options,
       '#default_value' => $this->getSetting('uri_scheme'),
       '#description' => t('Select where the final files should be stored. Private file storage has significantly more overhead than public files, but allows restricted access to files within this field.'),
       '#disabled' => $has_data,
-    );
+    ];
 
     return $element;
   }
@@ -146,50 +146,50 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
    * {@inheritdoc}
    */
   public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
-    $element = array();
+    $element = [];
     $settings = $this->getSettings();
 
-    $element['file_directory'] = array(
+    $element['file_directory'] = [
       '#type' => 'textfield',
       '#title' => t('File directory'),
       '#default_value' => $settings['file_directory'],
       '#description' => t('Optional subdirectory within the upload destination where files will be stored. Do not include preceding or trailing slashes.'),
-      '#element_validate' => array(array(get_class($this), 'validateDirectory')),
+      '#element_validate' => [[get_class($this), 'validateDirectory']],
       '#weight' => 3,
-    );
+    ];
 
     // Make the extension list a little more human-friendly by comma-separation.
     $extensions = str_replace(' ', ', ', $settings['file_extensions']);
-    $element['file_extensions'] = array(
+    $element['file_extensions'] = [
       '#type' => 'textfield',
       '#title' => t('Allowed file extensions'),
       '#default_value' => $extensions,
       '#description' => t('Separate extensions with a space or comma and do not include the leading dot.'),
-      '#element_validate' => array(array(get_class($this), 'validateExtensions')),
+      '#element_validate' => [[get_class($this), 'validateExtensions']],
       '#weight' => 1,
       '#maxlength' => 256,
       // By making this field required, we prevent a potential security issue
       // that would allow files of any type to be uploaded.
       '#required' => TRUE,
-    );
+    ];
 
-    $element['max_filesize'] = array(
+    $element['max_filesize'] = [
       '#type' => 'textfield',
       '#title' => t('Maximum upload size'),
       '#default_value' => $settings['max_filesize'],
-      '#description' => t('Enter a value like "512" (bytes), "80 KB" (kilobytes) or "50 MB" (megabytes) in order to restrict the allowed file size. If left empty the file sizes will be limited only by PHP\'s maximum post and file upload sizes (current limit <strong>%limit</strong>).', array('%limit' => format_size(file_upload_max_size()))),
+      '#description' => t('Enter a value like "512" (bytes), "80 KB" (kilobytes) or "50 MB" (megabytes) in order to restrict the allowed file size. If left empty the file sizes will be limited only by PHP\'s maximum post and file upload sizes (current limit <strong>%limit</strong>).', ['%limit' => format_size(file_upload_max_size())]),
       '#size' => 10,
-      '#element_validate' => array(array(get_class($this), 'validateMaxFilesize')),
+      '#element_validate' => [[get_class($this), 'validateMaxFilesize']],
       '#weight' => 5,
-    );
+    ];
 
-    $element['description_field'] = array(
+    $element['description_field'] = [
       '#type' => 'checkbox',
       '#title' => t('Enable <em>Description</em> field'),
       '#default_value' => isset($settings['description_field']) ? $settings['description_field'] : '',
       '#description' => t('The description field allows users to enter a description about the uploaded file.'),
       '#weight' => 11,
-    );
+    ];
 
     return $element;
   }
@@ -245,7 +245,7 @@ public static function validateExtensions($element, FormStateInterface $form_sta
    */
   public static function validateMaxFilesize($element, FormStateInterface $form_state) {
     if (!empty($element['#value']) && !is_numeric(Bytes::toInt($element['#value']))) {
-      $form_state->setError($element, t('The "@name" option must contain a valid value. You may either leave the text field empty or enter a string like "512" (bytes), "80 KB" (kilobytes) or "50 MB" (megabytes).', array('@name' => $element['title'])));
+      $form_state->setError($element, t('The "@name" option must contain a valid value. You may either leave the text field empty or enter a string like "512" (bytes), "80 KB" (kilobytes) or "50 MB" (megabytes).', ['@name' => $element['title']]));
     }
   }
 
@@ -261,7 +261,7 @@ public static function validateMaxFilesize($element, FormStateInterface $form_st
    *
    * @see \Drupal\Core\Utility\Token::replace()
    */
-  public function getUploadLocation($data = array()) {
+  public function getUploadLocation($data = []) {
     return static::doGetUploadLocation($this->getSettings(), $data);
   }
 
@@ -296,7 +296,7 @@ protected static function doGetUploadLocation(array $settings, $data = []) {
    *   element's '#upload_validators' property.
    */
   public function getUploadValidators() {
-    $validators = array();
+    $validators = [];
     $settings = $this->getSettings();
 
     // Cap the upload size according to the PHP limit.
@@ -306,11 +306,11 @@ public function getUploadValidators() {
     }
 
     // There is always a file size limit due to the PHP server limit.
-    $validators['file_validate_size'] = array($max_filesize);
+    $validators['file_validate_size'] = [$max_filesize];
 
     // Add the extension check if necessary.
     if (!empty($settings['file_extensions'])) {
-      $validators['file_validate_extensions'] = array($settings['file_extensions']);
+      $validators['file_validate_extensions'] = [$settings['file_extensions']];
     }
 
     return $validators;
@@ -331,11 +331,11 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
     $destination = $dirname . '/' . $random->name(10, TRUE) . '.txt';
     $data = $random->paragraphs(3);
     $file = file_save_data($data, $destination, FILE_EXISTS_ERROR);
-    $values = array(
+    $values = [
       'target_id' => $file->id(),
       'display' => (int)$settings['display_default'],
       'description' => $random->sentences(10),
-    );
+    ];
     return $values;
   }
 
diff --git a/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php b/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php
index 9a9dfe220f0b520fc4b1c08065da9b4b3ea9fc0d..587a396fc6029221b384e9e9ef99b7b81291db77 100644
--- a/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php
+++ b/core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php
@@ -48,27 +48,27 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'progress_indicator' => 'throbber',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['progress_indicator'] = array(
+    $element['progress_indicator'] = [
       '#type' => 'radios',
       '#title' => t('Progress indicator'),
-      '#options' => array(
+      '#options' => [
         'throbber' => t('Throbber'),
         'bar' => t('Bar with progress meter'),
-      ),
+      ],
       '#default_value' => $this->getSetting('progress_indicator'),
       '#description' => t('The throbber display does not show the status of uploads but takes up less space. The progress bar is helpful for monitoring progress on large uploads.'),
       '#weight' => 16,
       '#access' => file_progress_implementation(),
-    );
+    ];
     return $element;
   }
 
@@ -76,8 +76,8 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
-    $summary[] = t('Progress indicator: @progress_indicator', array('@progress_indicator' => $this->getSetting('progress_indicator')));
+    $summary = [];
+    $summary[] = t('Progress indicator: @progress_indicator', ['@progress_indicator' => $this->getSetting('progress_indicator')]);
     return $summary;
   }
 
@@ -115,15 +115,15 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
     $title = $this->fieldDefinition->getLabel();
     $description = $this->getFilteredDescription();
 
-    $elements = array();
+    $elements = [];
 
     $delta = 0;
     // Add an element for every existing item.
     foreach ($items as $item) {
-      $element = array(
+      $element = [
         '#title' => $title,
         '#description' => $description,
-      );
+      ];
       $element = $this->formSingleElement($items, $delta, $element, $form, $form_state);
 
       if ($element) {
@@ -131,15 +131,15 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
         if ($is_multiple) {
           // We name the element '_weight' to avoid clashing with elements
           // defined by widget.
-          $element['_weight'] = array(
+          $element['_weight'] = [
             '#type' => 'weight',
-            '#title' => t('Weight for row @number', array('@number' => $delta + 1)),
+            '#title' => t('Weight for row @number', ['@number' => $delta + 1]),
             '#title_display' => 'invisible',
             // Note: this 'delta' is the FAPI #type 'weight' element's property.
             '#delta' => $max,
             '#default_value' => $item->_weight ?: $delta,
             '#weight' => 100,
-          );
+          ];
         }
 
         $elements[$delta] = $element;
@@ -155,10 +155,10 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
     if ($empty_single_allowed || $empty_multiple_allowed) {
       // Create a new empty item.
       $items->appendItem();
-      $element = array(
+      $element = [
         '#title' => $title,
         '#description' => $description,
-      );
+      ];
       $element = $this->formSingleElement($items, $delta, $element, $form, $form_state);
       if ($element) {
         $element['#required'] = ($element['#required'] && $delta == 0);
@@ -173,8 +173,8 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
       $elements['#type'] = 'details';
       $elements['#open'] = TRUE;
       $elements['#theme'] = 'file_widget_multiple';
-      $elements['#theme_wrappers'] = array('details');
-      $elements['#process'] = array(array(get_class($this), 'processMultiple'));
+      $elements['#theme_wrappers'] = ['details'];
+      $elements['#process'] = [[get_class($this), 'processMultiple']];
       $elements['#title'] = $title;
 
       $elements['#description'] = $description;
@@ -183,19 +183,19 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
       // The field settings include defaults for the field type. However, this
       // widget is a base class for other widgets (e.g., ImageWidget) that may
       // act on field types without these expected settings.
-      $field_settings = $this->getFieldSettings() + array('display_field' => NULL);
+      $field_settings = $this->getFieldSettings() + ['display_field' => NULL];
       $elements['#display_field'] = (bool) $field_settings['display_field'];
 
       // Add some properties that will eventually be added to the file upload
       // field. These are added here so that they may be referenced easily
       // through a hook_form_alter().
       $elements['#file_upload_title'] = t('Add a new file');
-      $elements['#file_upload_description'] = array(
+      $elements['#file_upload_description'] = [
         '#theme' => 'file_upload_help',
         '#description' => '',
         '#upload_validators' => $elements[0]['#upload_validators'],
         '#cardinality' => $cardinality,
-      );
+      ];
     }
 
     return $elements;
@@ -210,28 +210,28 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     // The field settings include defaults for the field type. However, this
     // widget is a base class for other widgets (e.g., ImageWidget) that may act
     // on field types without these expected settings.
-    $field_settings += array(
+    $field_settings += [
       'display_default' => NULL,
       'display_field' => NULL,
       'description_field' => NULL,
-    );
+    ];
 
     $cardinality = $this->fieldDefinition->getFieldStorageDefinition()->getCardinality();
-    $defaults = array(
-      'fids' => array(),
+    $defaults = [
+      'fids' => [],
       'display' => (bool) $field_settings['display_default'],
       'description' => '',
-    );
+    ];
 
     // Essentially we use the managed_file type, extended with some
     // enhancements.
     $element_info = $this->elementInfo->getInfo('managed_file');
-    $element += array(
+    $element += [
       '#type' => 'managed_file',
       '#upload_location' => $items[$delta]->getUploadLocation(),
       '#upload_validators' => $items[$delta]->getUploadValidators(),
-      '#value_callback' => array(get_class($this), 'value'),
-      '#process' => array_merge($element_info['#process'], array(array(get_class($this), 'process'))),
+      '#value_callback' => [get_class($this), 'value'],
+      '#process' => array_merge($element_info['#process'], [[get_class($this), 'process']]),
       '#progress_indicator' => $this->getSetting('progress_indicator'),
       // Allows this field to return an array instead of a single value.
       '#extended' => TRUE,
@@ -242,29 +242,29 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       '#display_default' => $field_settings['display_default'],
       '#description_field' => $field_settings['description_field'],
       '#cardinality' => $cardinality,
-    );
+    ];
 
     $element['#weight'] = $delta;
 
     // Field stores FID value in a single mode, so we need to transform it for
     // form element to recognize it correctly.
     if (!isset($items[$delta]->fids) && isset($items[$delta]->target_id)) {
-      $items[$delta]->fids = array($items[$delta]->target_id);
+      $items[$delta]->fids = [$items[$delta]->target_id];
     }
     $element['#default_value'] = $items[$delta]->getValue() + $defaults;
 
     $default_fids = $element['#extended'] ? $element['#default_value']['fids'] : $element['#default_value'];
     if (empty($default_fids)) {
-      $file_upload_help = array(
+      $file_upload_help = [
         '#theme' => 'file_upload_help',
         '#description' => $element['#description'],
         '#upload_validators' => $element['#upload_validators'],
         '#cardinality' => $cardinality,
-      );
+      ];
       $element['#description'] = \Drupal::service('renderer')->renderPlain($file_upload_help);
       $element['#multiple'] = $cardinality != 1 ? TRUE : FALSE;
       if ($cardinality != 1 && $cardinality != -1) {
-        $element['#element_validate'] = array(array(get_class($this), 'validateMultipleCount'));
+        $element['#element_validate'] = [[get_class($this), 'validateMultipleCount']];
       }
     }
 
@@ -278,7 +278,7 @@ public function massageFormValues(array $values, array $form, FormStateInterface
     // Since file upload widget now supports uploads of more than one file at a
     // time it always returns an array of fids. We have to translate this to a
     // single fid, as field expects single value.
-    $new_values = array();
+    $new_values = [];
     foreach ($values as &$value) {
       foreach ($value['fids'] as $fid) {
         $new_value = $value;
@@ -324,11 +324,11 @@ public static function value($element, $input, FormStateInterface $form_state) {
     $return = ManagedFile::valueCallback($element, $input, $form_state);
 
     // Ensure that all the required properties are returned even if empty.
-    $return += array(
-      'fids' => array(),
+    $return += [
+      'fids' => [],
       'display' => 1,
       'description' => '',
-    );
+    ];
 
     return $return;
   }
@@ -353,7 +353,7 @@ public static function validateMultipleCount($element, FormStateInterface $form_
     if ($total_uploaded_count > $field_storage->getCardinality()) {
       $keep = $newly_uploaded_count - $total_uploaded_count + $field_storage->getCardinality();
       $removed_files = array_slice($values['fids'], $keep);
-      $removed_names = array();
+      $removed_names = [];
       foreach ($removed_files as $fid) {
         $file = File::load($fid);
         $removed_names[] = $file->getFilename();
@@ -385,11 +385,11 @@ public static function process($element, FormStateInterface $form_state, $form)
 
     // Add the display field if enabled.
     if ($element['#display_field']) {
-      $element['display'] = array(
+      $element['display'] = [
         '#type' => empty($item['fids']) ? 'hidden' : 'checkbox',
         '#title' => t('Include file in display'),
-        '#attributes' => array('class' => array('file-display')),
-      );
+        '#attributes' => ['class' => ['file-display']],
+      ];
       if (isset($item['display'])) {
         $element['display']['#value'] = $item['display'] ? '1' : '';
       }
@@ -398,33 +398,33 @@ public static function process($element, FormStateInterface $form_state, $form)
       }
     }
     else {
-      $element['display'] = array(
+      $element['display'] = [
         '#type' => 'hidden',
         '#value' => '1',
-      );
+      ];
     }
 
     // Add the description field if enabled.
     if ($element['#description_field'] && $item['fids']) {
       $config = \Drupal::config('file.settings');
-      $element['description'] = array(
+      $element['description'] = [
         '#type' => $config->get('description.type'),
         '#title' => t('Description'),
         '#value' => isset($item['description']) ? $item['description'] : '',
         '#maxlength' => $config->get('description.length'),
         '#description' => t('The description may be used as the label of the link to the file.'),
-      );
+      ];
     }
 
     // Adjust the Ajax settings so that on upload and remove of any individual
     // file, the entire group of file fields is updated together.
     if ($element['#cardinality'] != 1) {
       $parents = array_slice($element['#array_parents'], 0, -1);
-      $new_options = array(
-        'query' => array(
+      $new_options = [
+        'query' => [
           'element_parents' => implode('/', $parents),
-        ),
-      );
+        ],
+      ];
       $field_element = NestedArray::getValue($form, $parents);
       $new_wrapper = $field_element['#id'] . '-ajax-wrapper';
       foreach (Element::children($element) as $key) {
@@ -440,9 +440,9 @@ public static function process($element, FormStateInterface $form_state, $form)
     // functionality needed by the field widget. This submit handler, along with
     // the rebuild logic in file_field_widget_form() requires the entire field,
     // not just the individual item, to be valid.
-    foreach (array('upload_button', 'remove_button') as $key) {
-      $element[$key]['#submit'][] = array(get_called_class(), 'submit');
-      $element[$key]['#limit_validation_errors'] = array(array_slice($element['#parents'], 0, -1));
+    foreach (['upload_button', 'remove_button'] as $key) {
+      $element[$key]['#submit'][] = [get_called_class(), 'submit'];
+      $element[$key]['#limit_validation_errors'] = [array_slice($element['#parents'], 0, -1)];
     }
 
     return $element;
@@ -477,22 +477,22 @@ public static function processMultiple($element, FormStateInterface $form_state,
     foreach ($element_children as $delta => $key) {
       if ($key != $element['#file_upload_delta']) {
         $description = static::getDescriptionFromElement($element[$key]);
-        $element[$key]['_weight'] = array(
+        $element[$key]['_weight'] = [
           '#type' => 'weight',
-          '#title' => $description ? t('Weight for @title', array('@title' => $description)) : t('Weight for new file'),
+          '#title' => $description ? t('Weight for @title', ['@title' => $description]) : t('Weight for new file'),
           '#title_display' => 'invisible',
           '#delta' => $count,
           '#default_value' => $delta,
-        );
+        ];
       }
       else {
         // The title needs to be assigned to the upload field so that validation
         // errors include the correct widget label.
         $element[$key]['#title'] = $element['#title'];
-        $element[$key]['_weight'] = array(
+        $element[$key]['_weight'] = [
           '#type' => 'hidden',
           '#default_value' => $delta,
-        );
+        ];
       }
     }
 
@@ -559,12 +559,12 @@ public static function submit($form, FormStateInterface $form_state) {
 
     // If there are more files uploaded via the same widget, we have to separate
     // them, as we display each file in its own widget.
-    $new_values = array();
+    $new_values = [];
     foreach ($submitted_values as $delta => $submitted_value) {
       if (is_array($submitted_value['fids'])) {
         foreach ($submitted_value['fids'] as $fid) {
           $new_value = $submitted_value;
-          $new_value['fids'] = array($fid);
+          $new_value['fids'] = [$fid];
           $new_values[] = $new_value;
         }
       }
diff --git a/core/modules/file/src/Plugin/migrate/cckfield/d7/ImageField.php b/core/modules/file/src/Plugin/migrate/cckfield/d7/ImageField.php
index 7f47caa96e0b109bc7967df1ba7f3dd6131c324f..ad24ae24f1e6b6e64f7ca61adb981df4a4d6d0ef 100644
--- a/core/modules/file/src/Plugin/migrate/cckfield/d7/ImageField.php
+++ b/core/modules/file/src/Plugin/migrate/cckfield/d7/ImageField.php
@@ -17,7 +17,7 @@ class ImageField extends CckFieldPluginBase {
    * {@inheritdoc}
    */
   public function getFieldFormatterMap() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/file/src/Plugin/migrate/source/d6/File.php b/core/modules/file/src/Plugin/migrate/source/d6/File.php
index 13aee57bf67ad2872dcad5885964c2d702cc879d..0564b6b7886c2aeaa81cd91f79831db6deb8dfe1 100644
--- a/core/modules/file/src/Plugin/migrate/source/d6/File.php
+++ b/core/modules/file/src/Plugin/migrate/source/d6/File.php
@@ -75,7 +75,7 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'fid' => $this->t('File ID'),
       'uid' => $this->t('The {users}.uid who added the file. If set to 0, this file was added by an anonymous user.'),
       'filename' => $this->t('File name'),
@@ -85,7 +85,7 @@ public function fields() {
       'timestamp' => $this->t('The time that the file was added.'),
       'file_directory_path' => $this->t('The Drupal files path.'),
       'is_public' => $this->t('TRUE if the files directory is public otherwise FALSE.'),
-    );
+    ];
   }
   /**
    * {@inheritdoc}
diff --git a/core/modules/file/src/Plugin/migrate/source/d6/Upload.php b/core/modules/file/src/Plugin/migrate/source/d6/Upload.php
index 5b7c3ae7402cb7c92afb975fa2515a897f0261d6..4e07a236b5f7bab2bccd3d2e0d4bdff36ad29e5a 100644
--- a/core/modules/file/src/Plugin/migrate/source/d6/Upload.php
+++ b/core/modules/file/src/Plugin/migrate/source/d6/Upload.php
@@ -26,7 +26,7 @@ class Upload extends DrupalSqlBase {
   public function query() {
     $query = $this->select('upload', 'u')
       ->distinct()
-      ->fields('u', array('nid', 'vid'));
+      ->fields('u', ['nid', 'vid']);
     $query->innerJoin('node', 'n', static::JOIN);
     $query->addField('n', 'type');
     return $query;
@@ -37,7 +37,7 @@ public function query() {
    */
   public function prepareRow(Row $row) {
     $query = $this->select('upload', 'u')
-      ->fields('u', array('fid', 'description', 'list'))
+      ->fields('u', ['fid', 'description', 'list'])
       ->condition('u.nid', $row->getSourceProperty('nid'))
       ->orderBy('u.weight');
     $query->innerJoin('node', 'n', static::JOIN);
@@ -49,7 +49,7 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'fid' => $this->t('The file Id.'),
       'nid' => $this->t('The node Id.'),
       'vid' => $this->t('The version Id.'),
@@ -57,7 +57,7 @@ public function fields() {
       'description' => $this->t('The file description.'),
       'list' => $this->t('Whether the list should be visible on the node page.'),
       'weight' => $this->t('The file weight.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/file/src/Plugin/migrate/source/d6/UploadInstance.php b/core/modules/file/src/Plugin/migrate/source/d6/UploadInstance.php
index c20ac03eb930231556f495149af45cb93ae47f7f..c1b3345d7611d9d1ab0df653b27665c4248d640c 100644
--- a/core/modules/file/src/Plugin/migrate/source/d6/UploadInstance.php
+++ b/core/modules/file/src/Plugin/migrate/source/d6/UploadInstance.php
@@ -30,7 +30,7 @@ protected function initializeIterator() {
     $max_filesize = $this->variableGet('upload_uploadsize_default', 1);
     $max_filesize = $max_filesize ? $max_filesize . 'MB' : '';
     $file_extensions = $this->variableGet('upload_extensions_default', 'jpg jpeg gif png txt doc xls pdf ppt pps odt ods odp');
-    $return = array();
+    $return = [];
     $values = $this->select('variable', 'v')
       ->fields('v', ['name', 'value'])
       ->condition('v.name', $variables, 'IN')
@@ -55,22 +55,22 @@ protected function initializeIterator() {
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'node_type' => array(
+    return [
+      'node_type' => [
         'type' => 'string',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'node_type' => $this->t('Node type'),
       'max_filesize' => $this->t('Max filesize'),
       'file_extensions' => $this->t('File extensions'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/file/src/Plugin/migrate/source/d7/File.php b/core/modules/file/src/Plugin/migrate/source/d7/File.php
index 247a6cf0480fe62770ffc364f7056430ea6da08c..e418f825bb8ff71d2ace618d7ebc413069991da1 100644
--- a/core/modules/file/src/Plugin/migrate/source/d7/File.php
+++ b/core/modules/file/src/Plugin/migrate/source/d7/File.php
@@ -46,7 +46,7 @@ public function query() {
 
     // Filter by scheme(s), if configured.
     if (isset($this->configuration['scheme'])) {
-      $schemes = array();
+      $schemes = [];
       // Accept either a single scheme, or a list.
       foreach ((array) $this->configuration['scheme'] as $scheme) {
         $schemes[] = rtrim($scheme) . '://';
@@ -93,7 +93,7 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'fid' => $this->t('File ID'),
       'uid' => $this->t('The {users}.uid who added the file. If set to 0, this file was added by an anonymous user.'),
       'filename' => $this->t('File name'),
@@ -101,7 +101,7 @@ public function fields() {
       'filemime' => $this->t('File MIME Type'),
       'status' => $this->t('The published status of a file.'),
       'timestamp' => $this->t('The time that the file was added.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/file/src/Plugin/views/argument/Fid.php b/core/modules/file/src/Plugin/views/argument/Fid.php
index 832e85dad5741d41edf3321167e458736557e3e9..1654fcc2e3e5ec303c98bca8bc8e7336f9637d88 100644
--- a/core/modules/file/src/Plugin/views/argument/Fid.php
+++ b/core/modules/file/src/Plugin/views/argument/Fid.php
@@ -61,7 +61,7 @@ public function titleQuery() {
       ->condition('fid', $this->value, 'IN')
       ->execute();
     $files = $storage->loadMultiple($fids);
-    $titles = array();
+    $titles = [];
     foreach ($files as $file) {
       $titles[] = $file->getFilename();
     }
diff --git a/core/modules/file/src/Plugin/views/field/File.php b/core/modules/file/src/Plugin/views/field/File.php
index 18bc1fc312ae663f4ddc5a35a31be82228bc3d85..57d8c60accaf137fbd4dc5ee48c4fc224deda3de 100644
--- a/core/modules/file/src/Plugin/views/field/File.php
+++ b/core/modules/file/src/Plugin/views/field/File.php
@@ -33,7 +33,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['link_to_file'] = array('default' => FALSE);
+    $options['link_to_file'] = ['default' => FALSE];
     return $options;
   }
 
@@ -41,12 +41,12 @@ protected function defineOptions() {
    * Provide link to file option
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['link_to_file'] = array(
+    $form['link_to_file'] = [
       '#title' => $this->t('Link this field to download the file'),
       '#description' => $this->t("Enable to override this field's links."),
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['link_to_file']),
-    );
+    ];
     parent::buildOptionsForm($form, $form_state);
   }
 
diff --git a/core/modules/file/src/Tests/DownloadTest.php b/core/modules/file/src/Tests/DownloadTest.php
index e92cef3f2fc042ebe60d64361212394fc8b2b685..bb871d4fb1c469a486fe74f03d16c079d140c599 100644
--- a/core/modules/file/src/Tests/DownloadTest.php
+++ b/core/modules/file/src/Tests/DownloadTest.php
@@ -63,7 +63,7 @@ protected function doPrivateFileTransferTest() {
     $url  = file_create_url($file->getFileUri());
 
     // Set file_test access header to allow the download.
-    file_test_set_return('download', array('x-foo' => 'Bar'));
+    file_test_set_return('download', ['x-foo' => 'Bar']);
     $this->drupalGet($url);
     $this->assertEqual($this->drupalGetHeader('x-foo'), 'Bar', 'Found header set by file_test module on private download.');
     $this->assertFalse($this->drupalGetHeader('x-drupal-cache'), 'Page cache is disabled on private file download.');
@@ -102,10 +102,10 @@ function testFileCreateUrl() {
     // routed through Drupal, whereas private files should be served by Drupal,
     // so they need to be. The difference is most apparent when $script_path
     // is not empty (i.e., when not using clean URLs).
-    $clean_url_settings = array(
+    $clean_url_settings = [
       'clean' => '',
       'unclean' => 'index.php/',
-    );
+    ];
     $public_directory_path = \Drupal::service('stream_wrapper_manager')->getViaScheme('public')->getDirectoryPath();
     foreach ($clean_url_settings as $clean_url_setting => $script_path) {
       $clean_urls = $clean_url_setting == 'clean';
@@ -158,7 +158,7 @@ private function checkUrl($scheme, $directory, $filename, $expected_url) {
     if ($scheme == 'private') {
       // Tell the implementation of hook_file_download() in file_test.module
       // that this file may be downloaded.
-      file_test_set_return('download', array('x-foo' => 'Bar'));
+      file_test_set_return('download', ['x-foo' => 'Bar']);
     }
 
     $this->drupalGet($url);
diff --git a/core/modules/file/src/Tests/FileFieldAnonymousSubmissionTest.php b/core/modules/file/src/Tests/FileFieldAnonymousSubmissionTest.php
index 2286473c0387aec3a8b453c7133e234059809a29..b59b1bafd33c68bb85d95222c88b20650b01134f 100644
--- a/core/modules/file/src/Tests/FileFieldAnonymousSubmissionTest.php
+++ b/core/modules/file/src/Tests/FileFieldAnonymousSubmissionTest.php
@@ -19,10 +19,10 @@ class FileFieldAnonymousSubmissionTest extends FileFieldTestBase {
   protected function setUp() {
     parent::setUp();
     // Set up permissions for anonymous attacker user.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'create article content' => TRUE,
       'access content' => TRUE,
-    ));
+    ]);
   }
 
   /**
@@ -36,17 +36,17 @@ public function testAnonymousNode() {
     $this->drupalLogout();
     $this->drupalGet('node/add/article');
     $this->assertResponse(200, 'Loaded the article node form.');
-    $this->assertText(strip_tags(t('Create @name', array('@name' => $bundle_label))));
+    $this->assertText(strip_tags(t('Create @name', ['@name' => $bundle_label])));
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => $node_title,
       'body[0][value]' => 'Test article',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Save');
     $this->assertResponse(200);
-    $t_args = array('@type' => $bundle_label, '%title' => $node_title);
+    $t_args = ['@type' => $bundle_label, '%title' => $node_title];
     $this->assertText(strip_tags(t('@type %title has been created.', $t_args)), 'The node was created.');
-    $matches = array();
+    $matches = [];
     if (preg_match('@node/(\d+)$@', $this->getUrl(), $matches)) {
       $nid = end($matches);
       $this->assertNotEqual($nid, 0, 'The node ID was extracted from the URL.');
@@ -61,28 +61,28 @@ public function testAnonymousNode() {
   public function testAnonymousNodeWithFile() {
     $bundle_label = 'Article';
     $node_title = 'Test page';
-    $this->createFileField('field_image', 'node', 'article', array(), array('file_extensions' => 'txt png'));
+    $this->createFileField('field_image', 'node', 'article', [], ['file_extensions' => 'txt png']);
 
     // Load the node form.
     $this->drupalLogout();
     $this->drupalGet('node/add/article');
     $this->assertResponse(200, 'Loaded the article node form.');
-    $this->assertText(strip_tags(t('Create @name', array('@name' => $bundle_label))));
+    $this->assertText(strip_tags(t('Create @name', ['@name' => $bundle_label])));
 
     // Generate an image file.
     $image = $this->getTestFile('image');
 
     // Submit the form.
-    $edit = array(
+    $edit = [
       'title[0][value]' => $node_title,
       'body[0][value]' => 'Test article',
       'files[field_image_0]' => $this->container->get('file_system')->realpath($image->getFileUri()),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Save');
     $this->assertResponse(200);
-    $t_args = array('@type' => $bundle_label, '%title' => $node_title);
+    $t_args = ['@type' => $bundle_label, '%title' => $node_title];
     $this->assertText(strip_tags(t('@type %title has been created.', $t_args)), 'The node was created.');
-    $matches = array();
+    $matches = [];
     if (preg_match('@node/(\d+)$@', $this->getUrl(), $matches)) {
       $nid = end($matches);
       $this->assertNotEqual($nid, 0, 'The node ID was extracted from the URL.');
@@ -104,11 +104,11 @@ public function testAnonymousNodeWithFileWithoutTitle() {
    * Tests file submission for an authenticated user with a missing node title.
    */
   public function testAuthenticatedNodeWithFileWithoutTitle() {
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'bypass node access',
       'access content overview',
       'administer nodes',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
     $this->doTestNodeWithFileWithoutTitle();
   }
@@ -119,21 +119,21 @@ public function testAuthenticatedNodeWithFileWithoutTitle() {
   protected function doTestNodeWithFileWithoutTitle() {
     $bundle_label = 'Article';
     $node_title = 'Test page';
-    $this->createFileField('field_image', 'node', 'article', array(), array('file_extensions' => 'txt png'));
+    $this->createFileField('field_image', 'node', 'article', [], ['file_extensions' => 'txt png']);
 
     // Load the node form.
     $this->drupalGet('node/add/article');
     $this->assertResponse(200, 'Loaded the article node form.');
-    $this->assertText(strip_tags(t('Create @name', array('@name' => $bundle_label))));
+    $this->assertText(strip_tags(t('Create @name', ['@name' => $bundle_label])));
 
     // Generate an image file.
     $image = $this->getTestFile('image');
 
     // Submit the form but exclude the title field.
-    $edit = array(
+    $edit = [
       'body[0][value]' => 'Test article',
       'files[field_image_0]' => $this->container->get('file_system')->realpath($image->getFileUri()),
-    );
+    ];
     if (!$this->loggedInUser) {
       $label = 'Save';
     }
@@ -142,21 +142,21 @@ protected function doTestNodeWithFileWithoutTitle() {
     }
     $this->drupalPostForm(NULL, $edit, $label);
     $this->assertResponse(200);
-    $t_args = array('@type' => $bundle_label, '%title' => $node_title);
+    $t_args = ['@type' => $bundle_label, '%title' => $node_title];
     $this->assertNoText(strip_tags(t('@type %title has been created.', $t_args)), 'The node was created.');
     $this->assertText('Title field is required.');
 
     // Submit the form again but this time with the missing title field. This
     // should still work.
-    $edit = array(
+    $edit = [
       'title[0][value]' => $node_title,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, $label);
 
     // Confirm the final submission actually worked.
-    $t_args = array('@type' => $bundle_label, '%title' => $node_title);
+    $t_args = ['@type' => $bundle_label, '%title' => $node_title];
     $this->assertText(strip_tags(t('@type %title has been created.', $t_args)), 'The node was created.');
-    $matches = array();
+    $matches = [];
     if (preg_match('@node/(\d+)$@', $this->getUrl(), $matches)) {
       $nid = end($matches);
       $this->assertNotEqual($nid, 0, 'The node ID was extracted from the URL.');
diff --git a/core/modules/file/src/Tests/FileFieldDisplayTest.php b/core/modules/file/src/Tests/FileFieldDisplayTest.php
index b25b5142bc662464c91335692baaafdd37770129..f78cd7d6960a0d5f4be7e2fe2aa57630d440e803 100644
--- a/core/modules/file/src/Tests/FileFieldDisplayTest.php
+++ b/core/modules/file/src/Tests/FileFieldDisplayTest.php
@@ -18,23 +18,23 @@ class FileFieldDisplayTest extends FileFieldTestBase {
   function testNodeDisplay() {
     $field_name = strtolower($this->randomMachineName());
     $type_name = 'article';
-    $field_storage_settings = array(
+    $field_storage_settings = [
       'display_field' => '1',
       'display_default' => '1',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    );
-    $field_settings = array(
+    ];
+    $field_settings = [
       'description_field' => '1',
-    );
-    $widget_settings = array();
+    ];
+    $widget_settings = [];
     $this->createFileField($field_name, 'node', $type_name, $field_storage_settings, $field_settings, $widget_settings);
 
     // Create a new node *without* the file field set, and check that the field
     // is not shown for each node display.
-    $node = $this->drupalCreateNode(array('type' => $type_name));
+    $node = $this->drupalCreateNode(['type' => $type_name]);
     // Check file_default last as the assertions below assume that this is the
     // case.
-    $file_formatters = array('file_table', 'file_url_plain', 'hidden', 'file_default');
+    $file_formatters = ['file_table', 'file_url_plain', 'hidden', 'file_default'];
     foreach ($file_formatters as $formatter) {
       if ($formatter === 'hidden') {
         $edit = [
@@ -49,7 +49,7 @@ function testNodeDisplay() {
       }
       $this->drupalPostForm("admin/structure/types/manage/$type_name/display", $edit, t('Save'));
       $this->drupalGet('node/' . $node->id());
-      $this->assertNoText($field_name, format_string('Field label is hidden when no file attached for formatter %formatter', array('%formatter' => $formatter)));
+      $this->assertNoText($field_name, format_string('Field label is hidden when no file attached for formatter %formatter', ['%formatter' => $formatter]));
     }
 
     $test_file = $this->getTestFile('text');
@@ -65,28 +65,28 @@ function testNodeDisplay() {
 
     // Check that the default formatter is displaying with the file name.
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
-    $file_link = array(
+    $file_link = [
       '#theme' => 'file_link',
       '#file' => $node_file,
-    );
+    ];
     $default_output = \Drupal::service('renderer')->renderRoot($file_link);
     $this->assertRaw($default_output, 'Default formatter displaying correctly on full node view.');
 
     // Turn the "display" option off and check that the file is no longer displayed.
-    $edit = array($field_name . '[0][display]' => FALSE);
+    $edit = [$field_name . '[0][display]' => FALSE];
     $this->drupalPostForm('node/' . $nid . '/edit', $edit, t('Save and keep published'));
 
     $this->assertNoRaw($default_output, 'Field is hidden when "display" option is unchecked.');
 
     // Add a description and make sure that it is displayed.
     $description = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       $field_name . '[0][description]' => $description,
       $field_name . '[0][display]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('node/' . $nid . '/edit', $edit, t('Save and keep published'));
     $this->assertText($description);
 
@@ -113,15 +113,15 @@ function testNodeDisplay() {
   function testDefaultFileFieldDisplay() {
     $field_name = strtolower($this->randomMachineName());
     $type_name = 'article';
-    $field_storage_settings = array(
+    $field_storage_settings = [
       'display_field' => '1',
       'display_default' => '0',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    );
-    $field_settings = array(
+    ];
+    $field_settings = [
       'description_field' => '1',
-    );
-    $widget_settings = array();
+    ];
+    $widget_settings = [];
     $this->createFileField($field_name, 'node', $type_name, $field_storage_settings, $field_settings, $widget_settings);
 
     $test_file = $this->getTestFile('text');
@@ -142,31 +142,31 @@ function testDescToggle() {
     $field_type = 'file';
     $field_name = strtolower($this->randomMachineName());
     // Use the UI to add a new content type that also contains a file field.
-    $edit = array(
+    $edit = [
       'name' => $type_name,
       'type' => $type_name,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/add', $edit, t('Save and manage fields'));
-    $edit = array(
+    $edit = [
       'new_storage_type' => $field_type,
       'field_name' => $field_name,
       'label' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm('/admin/structure/types/manage/' . $type_name . '/fields/add-field', $edit, t('Save and continue'));
-    $this->drupalPostForm(NULL, array(), t('Save field settings'));
+    $this->drupalPostForm(NULL, [], t('Save field settings'));
     // Ensure the description field is selected on the field instance settings
     // form. That's what this test is all about.
-    $edit = array(
+    $edit = [
       'settings[description_field]' => TRUE,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save settings'));
     // Add a node of our new type and upload a file to it.
     $file = current($this->drupalGetTestFiles('text'));
     $title = $this->randomString();
-    $edit = array(
+    $edit = [
       'title[0][value]' => $title,
       'files[field_' . $field_name . '_0]' => drupal_realpath($file->uri),
-    );
+    ];
     $this->drupalPostForm('node/add/' . $type_name, $edit, t('Save and publish'));
     $node = $this->drupalGetNodeByTitle($title);
     $this->drupalGet('node/' . $node->id() . '/edit');
diff --git a/core/modules/file/src/Tests/FileFieldPathTest.php b/core/modules/file/src/Tests/FileFieldPathTest.php
index c9a15de812a052bcf6c90583cc4287e859cf7f39..f2498b52ff2ea8ad1fbc1a34d7c7410cddf76542 100644
--- a/core/modules/file/src/Tests/FileFieldPathTest.php
+++ b/core/modules/file/src/Tests/FileFieldPathTest.php
@@ -26,7 +26,7 @@ function testUploadPath() {
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
 
     // Check that the file was uploaded to the correct location.
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     /** @var \Drupal\file\FileInterface $node_file */
     $node_file = $node->{$field_name}->entity;
@@ -36,36 +36,36 @@ function testUploadPath() {
       $date_formatter->format(REQUEST_TIME, 'custom', 'Y') . '-' .
       $date_formatter->format(REQUEST_TIME, 'custom', 'm') . '/' .
       $test_file->getFilename();
-    $this->assertPathMatch($expected_filename, $node_file->getFileUri(), format_string('The file %file was uploaded to the correct path.', array('%file' => $node_file->getFileUri())));
+    $this->assertPathMatch($expected_filename, $node_file->getFileUri(), format_string('The file %file was uploaded to the correct path.', ['%file' => $node_file->getFileUri()]));
 
     // Change the path to contain multiple subdirectories.
-    $this->updateFileField($field_name, $type_name, array('file_directory' => 'foo/bar/baz'));
+    $this->updateFileField($field_name, $type_name, ['file_directory' => 'foo/bar/baz']);
 
     // Upload a new file into the subdirectories.
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
 
     // Check that the file was uploaded into the subdirectory.
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
-    $this->assertPathMatch('public://foo/bar/baz/' . $test_file->getFilename(), $node_file->getFileUri(), format_string('The file %file was uploaded to the correct path.', array('%file' => $node_file->getFileUri())));
+    $this->assertPathMatch('public://foo/bar/baz/' . $test_file->getFilename(), $node_file->getFileUri(), format_string('The file %file was uploaded to the correct path.', ['%file' => $node_file->getFileUri()]));
 
     // Check the path when used with tokens.
     // Change the path to contain multiple token directories.
-    $this->updateFileField($field_name, $type_name, array('file_directory' => '[current-user:uid]/[current-user:name]'));
+    $this->updateFileField($field_name, $type_name, ['file_directory' => '[current-user:uid]/[current-user:name]']);
 
     // Upload a new file into the token subdirectories.
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
 
     // Check that the file was uploaded into the subdirectory.
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
     // Do token replacement using the same user which uploaded the file, not
     // the user running the test case.
-    $data = array('user' => $this->adminUser);
+    $data = ['user' => $this->adminUser];
     $subdirectory = \Drupal::token()->replace('[user:uid]/[user:name]', $data);
-    $this->assertPathMatch('public://' . $subdirectory . '/' . $test_file->getFilename(), $node_file->getFileUri(), format_string('The file %file was uploaded to the correct path with token replacements.', array('%file' => $node_file->getFileUri())));
+    $this->assertPathMatch('public://' . $subdirectory . '/' . $test_file->getFilename(), $node_file->getFileUri(), format_string('The file %file was uploaded to the correct path with token replacements.', ['%file' => $node_file->getFileUri()]));
   }
 
   /**
diff --git a/core/modules/file/src/Tests/FileFieldRSSContentTest.php b/core/modules/file/src/Tests/FileFieldRSSContentTest.php
index 4e18e715515bb688feec840dceb64f24895afbd0..e16e82e6918b9b47c183ccc988b506162512d8ec 100644
--- a/core/modules/file/src/Tests/FileFieldRSSContentTest.php
+++ b/core/modules/file/src/Tests/FileFieldRSSContentTest.php
@@ -16,7 +16,7 @@ class FileFieldRSSContentTest extends FileFieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'views');
+  public static $modules = ['node', 'views'];
 
   /**
    * Tests RSS enclosure formatter display for RSS feeds.
@@ -30,29 +30,29 @@ function testFileFieldRSSContent() {
 
     // RSS display must be added manually.
     $this->drupalGet("admin/structure/types/manage/$type_name/display");
-    $edit = array(
+    $edit = [
       "display_modes_custom[rss]" => '1',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     // Change the format to 'RSS enclosure'.
     $this->drupalGet("admin/structure/types/manage/$type_name/display/rss");
-    $edit = array(
+    $edit = [
       "fields[$field_name][type]" => 'file_rss_enclosure',
       "fields[$field_name][region]" => 'content',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     // Create a new node with a file field set. Promote to frontpage
     // needs to be set so this node will appear in the RSS feed.
-    $node = $this->drupalCreateNode(array('type' => $type_name, 'promote' => 1));
+    $node = $this->drupalCreateNode(['type' => $type_name, 'promote' => 1]);
     $test_file = $this->getTestFile('text');
 
     // Create a new node with the uploaded file.
     $nid = $this->uploadNodeFile($test_file, $field_name, $node->id());
 
     // Get the uploaded file from the node.
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
 
@@ -61,7 +61,7 @@ function testFileFieldRSSContent() {
     $uploaded_filename = str_replace('public://', '', $node_file->getFileUri());
     $selector = sprintf(
       'enclosure[url="%s"][length="%s"][type="%s"]',
-      file_create_url("public://$uploaded_filename", array('absolute' => TRUE)),
+      file_create_url("public://$uploaded_filename", ['absolute' => TRUE]),
       $node_file->getSize(),
       $node_file->getMimeType()
     );
diff --git a/core/modules/file/src/Tests/FileFieldRevisionTest.php b/core/modules/file/src/Tests/FileFieldRevisionTest.php
index f5d00c7cb03c5199aca8cbdc6f8546a20464a471..ef7904182f155e6b7f1da365374d310e843104c9 100644
--- a/core/modules/file/src/Tests/FileFieldRevisionTest.php
+++ b/core/modules/file/src/Tests/FileFieldRevisionTest.php
@@ -35,7 +35,7 @@ function testRevisions() {
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
 
     // Check that the file exists on disk and in the database.
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file_r1 = File::load($node->{$field_name}->target_id);
     $node_vid_r1 = $node->getRevisionId();
@@ -45,7 +45,7 @@ function testRevisions() {
 
     // Upload another file to the same node in a new revision.
     $this->replaceNodeFile($test_file, $field_name, $nid);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file_r2 = File::load($node->{$field_name}->target_id);
     $node_vid_r2 = $node->getRevisionId();
@@ -63,8 +63,8 @@ function testRevisions() {
 
     // Save a new version of the node without any changes.
     // Check that the file is still the same as the previous revision.
-    $this->drupalPostForm('node/' . $nid . '/edit', array('revision' => '1'), t('Save and keep published'));
-    $node_storage->resetCache(array($nid));
+    $this->drupalPostForm('node/' . $nid . '/edit', ['revision' => '1'], t('Save and keep published'));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file_r3 = File::load($node->{$field_name}->target_id);
     $node_vid_r3 = $node->getRevisionId();
@@ -72,8 +72,8 @@ function testRevisions() {
     $this->assertFileIsPermanent($node_file_r3, 'New revision file is permanent.');
 
     // Revert to the first revision and check that the original file is active.
-    $this->drupalPostForm('node/' . $nid . '/revisions/' . $node_vid_r1 . '/revert', array(), t('Revert'));
-    $node_storage->resetCache(array($nid));
+    $this->drupalPostForm('node/' . $nid . '/revisions/' . $node_vid_r1 . '/revert', [], t('Revert'));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file_r4 = File::load($node->{$field_name}->target_id);
     $this->assertEqual($node_file_r1->id(), $node_file_r4->id(), 'Original revision file still in place after reverting to the original revision.');
@@ -81,7 +81,7 @@ function testRevisions() {
 
     // Delete the second revision and check that the file is kept (since it is
     // still being used by the third revision).
-    $this->drupalPostForm('node/' . $nid . '/revisions/' . $node_vid_r2 . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('node/' . $nid . '/revisions/' . $node_vid_r2 . '/delete', [], t('Delete'));
     $this->assertFileExists($node_file_r3, 'Second file is still available after deleting second revision, since it is being used by the third revision.');
     $this->assertFileEntryExists($node_file_r3, 'Second file entry is still available after deleting second revision, since it is being used by the third revision.');
     $this->assertFileIsPermanent($node_file_r3, 'Second file entry is still permanent after deleting second revision, since it is being used by the third revision.');
@@ -94,7 +94,7 @@ function testRevisions() {
     $this->drupalGet('user/' . $user->id() . '/edit');
 
     // Delete the third revision and check that the file is not deleted yet.
-    $this->drupalPostForm('node/' . $nid . '/revisions/' . $node_vid_r3 . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('node/' . $nid . '/revisions/' . $node_vid_r3 . '/delete', [], t('Delete'));
     $this->assertFileExists($node_file_r3, 'Second file is still available after deleting third revision, since it is being used by the user.');
     $this->assertFileEntryExists($node_file_r3, 'Second file entry is still available after deleting third revision, since it is being used by the user.');
     $this->assertFileIsPermanent($node_file_r3, 'Second file entry is still permanent after deleting third revision, since it is being used by the user.');
@@ -113,9 +113,9 @@ function testRevisions() {
     // of the file is older than the system.file.temporary_maximum_age
     // configuration value.
     db_update('file_managed')
-      ->fields(array(
+      ->fields([
         'changed' => REQUEST_TIME - ($this->config('system.file')->get('temporary_maximum_age') + 1),
-      ))
+      ])
       ->condition('fid', $node_file_r3->id())
       ->execute();
     \Drupal::service('cron')->run();
@@ -124,14 +124,14 @@ function testRevisions() {
     $this->assertFileEntryNotExists($node_file_r3, 'Second file entry is now deleted after deleting third revision, since it is no longer being used by any other nodes.');
 
     // Delete the entire node and check that the original file is deleted.
-    $this->drupalPostForm('node/' . $nid . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('node/' . $nid . '/delete', [], t('Delete'));
     // Call file_cron() to clean up the file. Make sure the changed timestamp
     // of the file is older than the system.file.temporary_maximum_age
     // configuration value.
     db_update('file_managed')
-      ->fields(array(
+      ->fields([
         'changed' => REQUEST_TIME - ($this->config('system.file')->get('temporary_maximum_age') + 1),
-      ))
+      ])
       ->condition('fid', $node_file_r1->id())
       ->execute();
     \Drupal::service('cron')->run();
diff --git a/core/modules/file/src/Tests/FileFieldTestBase.php b/core/modules/file/src/Tests/FileFieldTestBase.php
index 9ec9c753770abe4ddc2b59839e765e81a9ad14c5..a9c96f3a72a22a79ab7d9119603ab5a6fd262e37 100644
--- a/core/modules/file/src/Tests/FileFieldTestBase.php
+++ b/core/modules/file/src/Tests/FileFieldTestBase.php
@@ -21,7 +21,7 @@ abstract class FileFieldTestBase extends WebTestBase {
   *
   * @var array
   */
-  public static $modules = array('node', 'file', 'file_module_test', 'field_ui');
+  public static $modules = ['node', 'file', 'file_module_test', 'field_ui'];
 
   /**
    * An user with administration permissions.
@@ -32,9 +32,9 @@ abstract class FileFieldTestBase extends WebTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array('access content', 'access administration pages', 'administer site configuration', 'administer users', 'administer permissions', 'administer content types', 'administer node fields', 'administer node display', 'administer nodes', 'bypass node access'));
+    $this->adminUser = $this->drupalCreateUser(['access content', 'access administration pages', 'administer site configuration', 'administer users', 'administer permissions', 'administer content types', 'administer node fields', 'administer node display', 'administer nodes', 'bypass node access']);
     $this->drupalLogin($this->adminUser);
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
   }
 
   /**
@@ -76,14 +76,14 @@ function getLastFileId() {
    * @param array $widget_settings
    *   A list of widget settings that will be added to the widget defaults.
    */
-  function createFileField($name, $entity_type, $bundle, $storage_settings = array(), $field_settings = array(), $widget_settings = array()) {
-    $field_storage = FieldStorageConfig::create(array(
+  function createFileField($name, $entity_type, $bundle, $storage_settings = [], $field_settings = [], $widget_settings = []) {
+    $field_storage = FieldStorageConfig::create([
       'entity_type' => $entity_type,
       'field_name' => $name,
       'type' => 'file',
       'settings' => $storage_settings,
       'cardinality' => !empty($storage_settings['cardinality']) ? $storage_settings['cardinality'] : 1,
-    ));
+    ]);
     $field_storage->save();
 
     $this->attachFileField($name, $entity_type, $bundle, $field_settings, $widget_settings);
@@ -104,44 +104,44 @@ function createFileField($name, $entity_type, $bundle, $storage_settings = array
    * @param array $widget_settings
    *   A list of widget settings that will be added to the widget defaults.
    */
-  function attachFileField($name, $entity_type, $bundle, $field_settings = array(), $widget_settings = array()) {
-    $field = array(
+  function attachFileField($name, $entity_type, $bundle, $field_settings = [], $widget_settings = []) {
+    $field = [
       'field_name' => $name,
       'label' => $name,
       'entity_type' => $entity_type,
       'bundle' => $bundle,
       'required' => !empty($field_settings['required']),
       'settings' => $field_settings,
-    );
+    ];
     FieldConfig::create($field)->save();
 
     entity_get_form_display($entity_type, $bundle, 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'type' => 'file_generic',
         'settings' => $widget_settings,
-      ))
+      ])
       ->save();
     // Assign display settings.
     entity_get_display($entity_type, $bundle, 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'label' => 'hidden',
         'type' => 'file_default',
-      ))
+      ])
       ->save();
   }
 
   /**
    * Updates an existing file field with new settings.
    */
-  function updateFileField($name, $type_name, $field_settings = array(), $widget_settings = array()) {
+  function updateFileField($name, $type_name, $field_settings = [], $widget_settings = []) {
     $field = FieldConfig::loadByName('node', $type_name, $name);
     $field->setSettings(array_merge($field->getSettings(), $field_settings));
     $field->save();
 
     entity_get_form_display('node', $type_name, 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'settings' => $widget_settings,
-      ))
+      ])
       ->save();
   }
 
@@ -163,7 +163,7 @@ function updateFileField($name, $type_name, $field_settings = array(), $widget_s
    * @return int
    *   The node id.
    */
-  function uploadNodeFile(FileInterface $file, $field_name, $nid_or_type, $new_revision = TRUE, array $extras = array()) {
+  function uploadNodeFile(FileInterface $file, $field_name, $nid_or_type, $new_revision = TRUE, array $extras = []) {
     return $this->uploadNodeFiles([$file], $field_name, $nid_or_type, $new_revision, $extras);
   }
 
@@ -185,16 +185,16 @@ function uploadNodeFile(FileInterface $file, $field_name, $nid_or_type, $new_rev
    * @return int
    *   The node id.
    */
-  function uploadNodeFiles(array $files, $field_name, $nid_or_type, $new_revision = TRUE, array $extras = array()) {
-    $edit = array(
+  function uploadNodeFiles(array $files, $field_name, $nid_or_type, $new_revision = TRUE, array $extras = []) {
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
       'revision' => (string) (int) $new_revision,
-    );
+    ];
 
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     if (is_numeric($nid_or_type)) {
       $nid = $nid_or_type;
-      $node_storage->resetCache(array($nid));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
     }
     else {
@@ -205,7 +205,7 @@ function uploadNodeFiles(array $files, $field_name, $nid_or_type, $new_revision
       // Save at least one revision to better simulate a real site.
       $node->setNewRevision();
       $node->save();
-      $node_storage->resetCache(array($nid));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
       $this->assertNotEqual($nid, $node->getRevisionId(), 'Node revision exists.');
     }
@@ -238,11 +238,11 @@ function uploadNodeFiles(array $files, $field_name, $nid_or_type, $new_revision
    * Note that if replacing a file, it must first be removed then added again.
    */
   function removeNodeFile($nid, $new_revision = TRUE) {
-    $edit = array(
+    $edit = [
       'revision' => (string) (int) $new_revision,
-    );
+    ];
 
-    $this->drupalPostForm('node/' . $nid . '/edit', array(), t('Remove'));
+    $this->drupalPostForm('node/' . $nid . '/edit', [], t('Remove'));
     $this->drupalPostForm(NULL, $edit, t('Save and keep published'));
   }
 
@@ -250,12 +250,12 @@ function removeNodeFile($nid, $new_revision = TRUE) {
    * Replaces a file within a node.
    */
   function replaceNodeFile($file, $field_name, $nid, $new_revision = TRUE) {
-    $edit = array(
+    $edit = [
       'files[' . $field_name . '_0]' => drupal_realpath($file->getFileUri()),
       'revision' => (string) (int) $new_revision,
-    );
+    ];
 
-    $this->drupalPostForm('node/' . $nid . '/edit', array(), t('Remove'));
+    $this->drupalPostForm('node/' . $nid . '/edit', [], t('Remove'));
     $this->drupalPostForm(NULL, $edit, t('Save and keep published'));
   }
 
@@ -263,7 +263,7 @@ function replaceNodeFile($file, $field_name, $nid, $new_revision = TRUE) {
    * Asserts that a file exists physically on disk.
    */
   function assertFileExists($file, $message = NULL) {
-    $message = isset($message) ? $message : format_string('File %file exists on the disk.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file exists on the disk.', ['%file' => $file->getFileUri()]);
     $this->assertTrue(is_file($file->getFileUri()), $message);
   }
 
@@ -273,7 +273,7 @@ function assertFileExists($file, $message = NULL) {
   function assertFileEntryExists($file, $message = NULL) {
     $this->container->get('entity.manager')->getStorage('file')->resetCache();
     $db_file = File::load($file->id());
-    $message = isset($message) ? $message : format_string('File %file exists in database at the correct path.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file exists in database at the correct path.', ['%file' => $file->getFileUri()]);
     $this->assertEqual($db_file->getFileUri(), $file->getFileUri(), $message);
   }
 
@@ -281,7 +281,7 @@ function assertFileEntryExists($file, $message = NULL) {
    * Asserts that a file does not exist on disk.
    */
   function assertFileNotExists($file, $message = NULL) {
-    $message = isset($message) ? $message : format_string('File %file exists on the disk.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file exists on the disk.', ['%file' => $file->getFileUri()]);
     $this->assertFalse(is_file($file->getFileUri()), $message);
   }
 
@@ -290,7 +290,7 @@ function assertFileNotExists($file, $message = NULL) {
    */
   function assertFileEntryNotExists($file, $message) {
     $this->container->get('entity.manager')->getStorage('file')->resetCache();
-    $message = isset($message) ? $message : format_string('File %file exists in database at the correct path.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file exists in database at the correct path.', ['%file' => $file->getFileUri()]);
     $this->assertFalse(File::load($file->id()), $message);
   }
 
@@ -298,7 +298,7 @@ function assertFileEntryNotExists($file, $message) {
    * Asserts that a file's status is set to permanent in the database.
    */
   function assertFileIsPermanent(FileInterface $file, $message = NULL) {
-    $message = isset($message) ? $message : format_string('File %file is permanent.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file is permanent.', ['%file' => $file->getFileUri()]);
     $this->assertTrue($file->isPermanent(), $message);
   }
 
diff --git a/core/modules/file/src/Tests/FileFieldValidateTest.php b/core/modules/file/src/Tests/FileFieldValidateTest.php
index 9d43060ccce2ded8a1ee85ed185ccb1265a1499a..0f8b1f1de7fd336c31db5ba62d76e8c480a31ffa 100644
--- a/core/modules/file/src/Tests/FileFieldValidateTest.php
+++ b/core/modules/file/src/Tests/FileFieldValidateTest.php
@@ -21,22 +21,22 @@ function testRequired() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $type_name = 'article';
     $field_name = strtolower($this->randomMachineName());
-    $storage = $this->createFileField($field_name, 'node', $type_name, array(), array('required' => '1'));
+    $storage = $this->createFileField($field_name, 'node', $type_name, [], ['required' => '1']);
     $field = FieldConfig::loadByName('node', $type_name, $field_name);
 
     $test_file = $this->getTestFile('text');
 
     // Try to post a new node without uploading a file.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $this->drupalPostForm('node/add/' . $type_name, $edit, t('Save and publish'));
-    $this->assertRaw(t('@title field is required.', array('@title' => $field->getLabel())), 'Node save failed when required file field was empty.');
+    $this->assertRaw(t('@title field is required.', ['@title' => $field->getLabel()]), 'Node save failed when required file field was empty.');
 
     // Create a new node with the uploaded file.
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
-    $this->assertTrue($nid !== FALSE, format_string('uploadNodeFile(@test_file, @field_name, @type_name) succeeded', array('@test_file' => $test_file->getFileUri(), '@field_name' => $field_name, '@type_name' => $type_name)));
+    $this->assertTrue($nid !== FALSE, format_string('uploadNodeFile(@test_file, @field_name, @type_name) succeeded', ['@test_file' => $test_file->getFileUri(), '@field_name' => $field_name, '@type_name' => $type_name]));
 
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
 
     $node_file = File::load($node->{$field_name}->target_id);
@@ -45,17 +45,17 @@ function testRequired() {
 
     // Try again with a multiple value field.
     $storage->delete();
-    $this->createFileField($field_name, 'node', $type_name, array('cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED), array('required' => '1'));
+    $this->createFileField($field_name, 'node', $type_name, ['cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED], ['required' => '1']);
 
     // Try to post a new node without uploading a file in the multivalue field.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $this->drupalPostForm('node/add/' . $type_name, $edit, t('Save and publish'));
-    $this->assertRaw(t('@title field is required.', array('@title' => $field->getLabel())), 'Node save failed when required multiple value file field was empty.');
+    $this->assertRaw(t('@title field is required.', ['@title' => $field->getLabel()]), 'Node save failed when required multiple value file field was empty.');
 
     // Create a new node with the uploaded file into the multivalue field.
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
     $this->assertFileExists($node_file, 'File exists after uploading to the required multiple value field.');
@@ -69,46 +69,46 @@ function testFileMaxSize() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $type_name = 'article';
     $field_name = strtolower($this->randomMachineName());
-    $this->createFileField($field_name, 'node', $type_name, array(), array('required' => '1'));
+    $this->createFileField($field_name, 'node', $type_name, [], ['required' => '1']);
 
     $small_file = $this->getTestFile('text', 131072); // 128KB.
     $large_file = $this->getTestFile('text', 1310720); // 1.2MB
 
     // Test uploading both a large and small file with different increments.
-    $sizes = array(
+    $sizes = [
       '1M' => 1048576,
       '1024K' => 1048576,
       '1048576' => 1048576,
-    );
+    ];
 
     foreach ($sizes as $max_filesize => $file_limit) {
       // Set the max file upload size.
-      $this->updateFileField($field_name, $type_name, array('max_filesize' => $max_filesize));
+      $this->updateFileField($field_name, $type_name, ['max_filesize' => $max_filesize]);
 
       // Create a new node with the small file, which should pass.
       $nid = $this->uploadNodeFile($small_file, $field_name, $type_name);
-      $node_storage->resetCache(array($nid));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
       $node_file = File::load($node->{$field_name}->target_id);
-      $this->assertFileExists($node_file, format_string('File exists after uploading a file (%filesize) under the max limit (%maxsize).', array('%filesize' => format_size($small_file->getSize()), '%maxsize' => $max_filesize)));
-      $this->assertFileEntryExists($node_file, format_string('File entry exists after uploading a file (%filesize) under the max limit (%maxsize).', array('%filesize' => format_size($small_file->getSize()), '%maxsize' => $max_filesize)));
+      $this->assertFileExists($node_file, format_string('File exists after uploading a file (%filesize) under the max limit (%maxsize).', ['%filesize' => format_size($small_file->getSize()), '%maxsize' => $max_filesize]));
+      $this->assertFileEntryExists($node_file, format_string('File entry exists after uploading a file (%filesize) under the max limit (%maxsize).', ['%filesize' => format_size($small_file->getSize()), '%maxsize' => $max_filesize]));
 
       // Check that uploading the large file fails (1M limit).
       $this->uploadNodeFile($large_file, $field_name, $type_name);
-      $error_message = t('The file is %filesize exceeding the maximum file size of %maxsize.', array('%filesize' => format_size($large_file->getSize()), '%maxsize' => format_size($file_limit)));
-      $this->assertRaw($error_message, format_string('Node save failed when file (%filesize) exceeded the max upload size (%maxsize).', array('%filesize' => format_size($large_file->getSize()), '%maxsize' => $max_filesize)));
+      $error_message = t('The file is %filesize exceeding the maximum file size of %maxsize.', ['%filesize' => format_size($large_file->getSize()), '%maxsize' => format_size($file_limit)]);
+      $this->assertRaw($error_message, format_string('Node save failed when file (%filesize) exceeded the max upload size (%maxsize).', ['%filesize' => format_size($large_file->getSize()), '%maxsize' => $max_filesize]));
     }
 
     // Turn off the max filesize.
-    $this->updateFileField($field_name, $type_name, array('max_filesize' => ''));
+    $this->updateFileField($field_name, $type_name, ['max_filesize' => '']);
 
     // Upload the big file successfully.
     $nid = $this->uploadNodeFile($large_file, $field_name, $type_name);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
-    $this->assertFileExists($node_file, format_string('File exists after uploading a file (%filesize) with no max limit.', array('%filesize' => format_size($large_file->getSize()))));
-    $this->assertFileEntryExists($node_file, format_string('File entry exists after uploading a file (%filesize) with no max limit.', array('%filesize' => format_size($large_file->getSize()))));
+    $this->assertFileExists($node_file, format_string('File exists after uploading a file (%filesize) with no max limit.', ['%filesize' => format_size($large_file->getSize())]));
+    $this->assertFileEntryExists($node_file, format_string('File entry exists after uploading a file (%filesize) with no max limit.', ['%filesize' => format_size($large_file->getSize())]));
   }
 
   /**
@@ -124,30 +124,30 @@ function testFileExtension() {
     list(, $test_file_extension) = explode('.', $test_file->getFilename());
 
     // Disable extension checking.
-    $this->updateFileField($field_name, $type_name, array('file_extensions' => ''));
+    $this->updateFileField($field_name, $type_name, ['file_extensions' => '']);
 
     // Check that the file can be uploaded with no extension checking.
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
     $this->assertFileExists($node_file, 'File exists after uploading a file with no extension checking.');
     $this->assertFileEntryExists($node_file, 'File entry exists after uploading a file with no extension checking.');
 
     // Enable extension checking for text files.
-    $this->updateFileField($field_name, $type_name, array('file_extensions' => 'txt'));
+    $this->updateFileField($field_name, $type_name, ['file_extensions' => 'txt']);
 
     // Check that the file with the wrong extension cannot be uploaded.
     $this->uploadNodeFile($test_file, $field_name, $type_name);
-    $error_message = t('Only files with the following extensions are allowed: %files-allowed.', array('%files-allowed' => 'txt'));
+    $error_message = t('Only files with the following extensions are allowed: %files-allowed.', ['%files-allowed' => 'txt']);
     $this->assertRaw($error_message, 'Node save failed when file uploaded with the wrong extension.');
 
     // Enable extension checking for text and image files.
-    $this->updateFileField($field_name, $type_name, array('file_extensions' => "txt $test_file_extension"));
+    $this->updateFileField($field_name, $type_name, ['file_extensions' => "txt $test_file_extension"]);
 
     // Check that the file can be uploaded with extension checking.
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
     $this->assertFileExists($node_file, 'File exists after uploading a file with extension checking.');
@@ -166,18 +166,18 @@ public function testFileRemoval() {
     $test_file = $this->getTestFile('image');
 
     // Disable extension checking.
-    $this->updateFileField($field_name, $type_name, array('file_extensions' => ''));
+    $this->updateFileField($field_name, $type_name, ['file_extensions' => '']);
 
     // Check that the file can be uploaded with no extension checking.
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
     $this->assertFileExists($node_file, 'File exists after uploading a file with no extension checking.');
     $this->assertFileEntryExists($node_file, 'File entry exists after uploading a file with no extension checking.');
 
     // Enable extension checking for text files.
-    $this->updateFileField($field_name, $type_name, array('file_extensions' => 'txt'));
+    $this->updateFileField($field_name, $type_name, ['file_extensions' => 'txt']);
 
     // Check that the file can still be removed.
     $this->removeNodeFile($nid);
diff --git a/core/modules/file/src/Tests/FileFieldWidgetTest.php b/core/modules/file/src/Tests/FileFieldWidgetTest.php
index 414c86b55f3b43cd669c059b75ed864f5e696e7d..f132d70d5f713c0f20ca6dceca30c57dd3c5116b 100644
--- a/core/modules/file/src/Tests/FileFieldWidgetTest.php
+++ b/core/modules/file/src/Tests/FileFieldWidgetTest.php
@@ -38,7 +38,7 @@ protected function setUp() {
    *
    * @var array
    */
-  public static $modules = array('comment', 'block');
+  public static $modules = ['comment', 'block'];
 
   /**
    * Creates a temporary file, for a specific user.
@@ -81,13 +81,13 @@ function testSingleValuedWidget() {
 
     $test_file = $this->getTestFile('text');
 
-    foreach (array('nojs', 'js') as $type) {
+    foreach (['nojs', 'js'] as $type) {
       // Create a new node with the uploaded file and ensure it got uploaded
       // successfully.
       // @todo This only tests a 'nojs' submission, because drupalPostAjaxForm()
       //   does not yet support file uploads.
       $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
-      $node_storage->resetCache(array($nid));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
       $node_file = File::load($node->{$field_name}->target_id);
       $this->assertFileExists($node_file, 'New file saved to disk on node creation.');
@@ -104,11 +104,11 @@ function testSingleValuedWidget() {
       // "Click" the remove button (emulating either a nojs or js submission).
       switch ($type) {
         case 'nojs':
-          $this->drupalPostForm(NULL, array(), t('Remove'));
+          $this->drupalPostForm(NULL, [], t('Remove'));
           break;
         case 'js':
           $button = $this->xpath('//input[@type="submit" and @value="' . t('Remove') . '"]');
-          $this->drupalPostAjaxForm(NULL, array(), array((string) $button[0]['name'] => (string) $button[0]['value']));
+          $this->drupalPostAjaxForm(NULL, [], [(string) $button[0]['name'] => (string) $button[0]['value']]);
           break;
       }
 
@@ -121,8 +121,8 @@ function testSingleValuedWidget() {
       $this->assertTrue(isset($label[0]), 'Label for upload found.');
 
       // Save the node and ensure it does not have the file.
-      $this->drupalPostForm(NULL, array(), t('Save and keep published'));
-      $node_storage->resetCache(array($nid));
+      $this->drupalPostForm(NULL, [], t('Save and keep published'));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
       $this->assertTrue(empty($node->{$field_name}->target_id), 'File was successfully removed from the node.');
     }
@@ -143,12 +143,12 @@ function testMultiValuedWidget() {
     $field_name = 'test_file_field_1';
     $field_name2 = 'test_file_field_2';
     $cardinality = 3;
-    $this->createFileField($field_name, 'node', $type_name, array('cardinality' => $cardinality));
-    $this->createFileField($field_name2, 'node', $type_name, array('cardinality' => $cardinality));
+    $this->createFileField($field_name, 'node', $type_name, ['cardinality' => $cardinality]);
+    $this->createFileField($field_name2, 'node', $type_name, ['cardinality' => $cardinality]);
 
     $test_file = $this->getTestFile('text');
 
-    foreach (array('nojs', 'js') as $type) {
+    foreach (['nojs', 'js'] as $type) {
       // Visit the node creation form, and upload 3 files for each field. Since
       // the field has cardinality of 3, ensure the "Upload" button is displayed
       // until after the 3rd file, and after that, isn't displayed. Because
@@ -158,9 +158,9 @@ function testMultiValuedWidget() {
       //   does not yet emulate jQuery's file upload.
       //
       $this->drupalGet("node/add/$type_name");
-      foreach (array($field_name2, $field_name) as $each_field_name) {
+      foreach ([$field_name2, $field_name] as $each_field_name) {
         for ($delta = 0; $delta < 3; $delta++) {
-          $edit = array('files[' . $each_field_name . '_' . $delta . '][]' => drupal_realpath($test_file->getFileUri()));
+          $edit = ['files[' . $each_field_name . '_' . $delta . '][]' => drupal_realpath($test_file->getFileUri())];
           // If the Upload button doesn't exist, drupalPostForm() will automatically
           // fail with an assertion message.
           $this->drupalPostForm(NULL, $edit, t('Upload'));
@@ -170,7 +170,7 @@ function testMultiValuedWidget() {
 
       $num_expected_remove_buttons = 6;
 
-      foreach (array($field_name, $field_name2) as $current_field_name) {
+      foreach ([$field_name, $field_name2] as $current_field_name) {
         // How many uploaded files for the current field are remaining.
         $remaining = 3;
         // Test clicking each "Remove" button. For extra robustness, test them out
@@ -179,11 +179,11 @@ function testMultiValuedWidget() {
         // - First remove the 2nd file.
         // - Then remove what is then the 2nd file (was originally the 3rd file).
         // - Then remove the first file.
-        foreach (array(1, 1, 0) as $delta) {
+        foreach ([1, 1, 0] as $delta) {
           // Ensure we have the expected number of Remove buttons, and that they
           // are numbered sequentially.
           $buttons = $this->xpath('//input[@type="submit" and @value="Remove"]');
-          $this->assertTrue(is_array($buttons) && count($buttons) === $num_expected_remove_buttons, format_string('There are %n "Remove" buttons displayed (JSMode=%type).', array('%n' => $num_expected_remove_buttons, '%type' => $type)));
+          $this->assertTrue(is_array($buttons) && count($buttons) === $num_expected_remove_buttons, format_string('There are %n "Remove" buttons displayed (JSMode=%type).', ['%n' => $num_expected_remove_buttons, '%type' => $type]));
           foreach ($buttons as $i => $button) {
             $key = $i >= $remaining ? $i - $remaining : $i;
             $check_field_name = $field_name2;
@@ -210,12 +210,12 @@ function testMultiValuedWidget() {
                   $button['value'] = 'DUMMY';
                 }
               }
-              $this->drupalPostForm(NULL, array(), t('Remove'));
+              $this->drupalPostForm(NULL, [], t('Remove'));
               break;
             case 'js':
               // drupalPostAjaxForm() lets us target the button precisely, so we don't
               // require the workaround used above for nojs.
-              $this->drupalPostAjaxForm(NULL, array(), array($button_name => t('Remove')));
+              $this->drupalPostAjaxForm(NULL, [], [$button_name => t('Remove')]);
               break;
           }
           $num_expected_remove_buttons--;
@@ -224,38 +224,38 @@ function testMultiValuedWidget() {
           // Ensure an "Upload" button for the current field is displayed with the
           // correct name.
           $upload_button_name = $current_field_name . '_' . $remaining . '_upload_button';
-          $buttons = $this->xpath('//input[@type="submit" and @value="Upload" and @name=:name]', array(':name' => $upload_button_name));
-          $this->assertTrue(is_array($buttons) && count($buttons) == 1, format_string('The upload button is displayed with the correct name (JSMode=%type).', array('%type' => $type)));
+          $buttons = $this->xpath('//input[@type="submit" and @value="Upload" and @name=:name]', [':name' => $upload_button_name]);
+          $this->assertTrue(is_array($buttons) && count($buttons) == 1, format_string('The upload button is displayed with the correct name (JSMode=%type).', ['%type' => $type]));
 
           // Ensure only at most one button per field is displayed.
           $buttons = $this->xpath('//input[@type="submit" and @value="Upload"]');
           $expected = $current_field_name == $field_name ? 1 : 2;
-          $this->assertTrue(is_array($buttons) && count($buttons) == $expected, format_string('After removing a file, only one "Upload" button for each possible field is displayed (JSMode=%type).', array('%type' => $type)));
+          $this->assertTrue(is_array($buttons) && count($buttons) == $expected, format_string('After removing a file, only one "Upload" button for each possible field is displayed (JSMode=%type).', ['%type' => $type]));
         }
       }
 
       // Ensure the page now has no Remove buttons.
-      $this->assertNoFieldByXPath('//input[@type="submit"]', t('Remove'), format_string('After removing all files, there is no "Remove" button displayed (JSMode=%type).', array('%type' => $type)));
+      $this->assertNoFieldByXPath('//input[@type="submit"]', t('Remove'), format_string('After removing all files, there is no "Remove" button displayed (JSMode=%type).', ['%type' => $type]));
 
       // Save the node and ensure it does not have any files.
-      $this->drupalPostForm(NULL, array('title[0][value]' => $this->randomMachineName()), t('Save and publish'));
-      $matches = array();
+      $this->drupalPostForm(NULL, ['title[0][value]' => $this->randomMachineName()], t('Save and publish'));
+      $matches = [];
       preg_match('/node\/([0-9]+)/', $this->getUrl(), $matches);
       $nid = $matches[1];
-      $node_storage->resetCache(array($nid));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
       $this->assertTrue(empty($node->{$field_name}->target_id), 'Node was successfully saved without any files.');
     }
 
-    $upload_files_node_creation = array($test_file, $test_file);
+    $upload_files_node_creation = [$test_file, $test_file];
     // Try to upload multiple files, but fewer than the maximum.
     $nid = $this->uploadNodeFiles($upload_files_node_creation, $field_name, $type_name);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $this->assertEqual(count($node->{$field_name}), count($upload_files_node_creation), 'Node was successfully saved with mulitple files.');
 
     // Try to upload more files than allowed on revision.
-    $upload_files_node_revision = array($test_file, $test_file, $test_file, $test_file);
+    $upload_files_node_revision = [$test_file, $test_file, $test_file, $test_file];
     $this->uploadNodeFiles($upload_files_node_revision, $field_name, $nid, 1);
     $args = [
       '%field' => $field_name,
@@ -264,7 +264,7 @@ function testMultiValuedWidget() {
       '%list' => implode(', ', array_fill(0, 3, $test_file->getFilename())),
     ];
     $this->assertRaw(t('Field %field can only hold @max values but there were @count uploaded. The following files have been omitted as a result: %list.', $args));
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $this->assertEqual(count($node->{$field_name}), $cardinality, 'More files than allowed could not be saved to node.');
 
@@ -274,14 +274,14 @@ function testMultiValuedWidget() {
       'type' => $type_name
     ]);
     $this->uploadNodeFile($test_file, $field_name, $node->id(), 1);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $this->assertEqual(count($node->{$field_name}), $cardinality, 'Node was successfully revised to maximum number of files.');
 
     // Try to upload exactly the allowed number of files, new node.
     $upload_files = array_fill(0, $cardinality, $test_file);
     $nid = $this->uploadNodeFiles($upload_files, $field_name, $type_name);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $this->assertEqual(count($node->{$field_name}), $cardinality, 'Node was successfully saved with maximum number of files.');
 
@@ -304,7 +304,7 @@ function testMultiValuedWidget() {
   function testPrivateFileSetting() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     // Grant the admin user required permissions.
-    user_role_grant_permissions($this->adminUser->roles[0]->target_id, array('administer node fields'));
+    user_role_grant_permissions($this->adminUser->roles[0]->target_id, ['administer node fields']);
 
     $type_name = 'article';
     $field_name = strtolower($this->randomMachineName());
@@ -315,10 +315,10 @@ function testPrivateFileSetting() {
     $test_file = $this->getTestFile('text');
 
     // Change the field setting to make its files private, and upload a file.
-    $edit = array('settings[uri_scheme]' => 'private');
+    $edit = ['settings[uri_scheme]' => 'private'];
     $this->drupalPostForm("admin/structure/types/manage/$type_name/fields/$field_id/storage", $edit, t('Save field settings'));
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
     $this->assertFileExists($node_file, 'New file saved to disk on node creation.');
@@ -342,41 +342,41 @@ function testPrivateFileSetting() {
    * Tests that download restrictions on private files work on comments.
    */
   function testPrivateFileComment() {
-    $user = $this->drupalCreateUser(array('access comments'));
+    $user = $this->drupalCreateUser(['access comments']);
 
     // Grant the admin user required comment permissions.
     $roles = $this->adminUser->getRoles();
-    user_role_grant_permissions($roles[1], array('administer comment fields', 'administer comments'));
+    user_role_grant_permissions($roles[1], ['administer comment fields', 'administer comments']);
 
     // Revoke access comments permission from anon user, grant post to
     // authenticated.
-    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, array('access comments'));
-    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('post comments', 'skip comment approval'));
+    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, ['access comments']);
+    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, ['post comments', 'skip comment approval']);
 
     // Create a new field.
     $this->addDefaultCommentField('node', 'article');
 
     $name = strtolower($this->randomMachineName());
     $label = $this->randomMachineName();
-    $storage_edit = array('settings[uri_scheme]' => 'private');
+    $storage_edit = ['settings[uri_scheme]' => 'private'];
     $this->fieldUIAddNewField('admin/structure/comment/manage/comment', $name, $label, 'file', $storage_edit);
 
     // Manually clear cache on the tester side.
     \Drupal::entityManager()->clearCachedFieldDefinitions();
 
     // Create node.
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('node/add/article', $edit, t('Save and publish'));
     $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
 
     // Add a comment with a file.
     $text_file = $this->getTestFile('text');
-    $edit = array(
+    $edit = [
       'files[field_' . $name . '_' . 0 . ']' => drupal_realpath($text_file->getFileUri()),
       'comment_body[0][value]' => $comment_body = $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('node/' . $node->id(), $edit, t('Save'));
 
     // Get the comment ID.
@@ -402,7 +402,7 @@ function testPrivateFileComment() {
 
     // Unpublishes node.
     $this->drupalLogin($this->adminUser);
-    $this->drupalPostForm('node/' . $node->id() . '/edit', array(), t('Save and unpublish'));
+    $this->drupalPostForm('node/' . $node->id() . '/edit', [], t('Save and unpublish'));
 
     // Ensures normal user can no longer download the file.
     $this->drupalLogin($user);
@@ -417,11 +417,11 @@ function testWidgetValidation() {
     $type_name = 'article';
     $field_name = strtolower($this->randomMachineName());
     $this->createFileField($field_name, 'node', $type_name);
-    $this->updateFileField($field_name, $type_name, array('file_extensions' => 'txt'));
+    $this->updateFileField($field_name, $type_name, ['file_extensions' => 'txt']);
 
-    foreach (array('nojs', 'js') as $type) {
+    foreach (['nojs', 'js'] as $type) {
       // Create node and prepare files for upload.
-      $node = $this->drupalCreateNode(array('type' => 'article'));
+      $node = $this->drupalCreateNode(['type' => 'article']);
       $nid = $node->id();
       $this->drupalGet("node/$nid/edit");
       $test_file_text = $this->getTestFile('text');
@@ -436,11 +436,11 @@ function testWidgetValidation() {
           break;
         case 'js':
           $button = $this->xpath('//input[@type="submit" and @value="' . t('Upload') . '"]');
-          $this->drupalPostAjaxForm(NULL, $edit, array((string) $button[0]['name'] => (string) $button[0]['value']));
+          $this->drupalPostAjaxForm(NULL, $edit, [(string) $button[0]['name'] => (string) $button[0]['value']]);
           break;
       }
-      $error_message = t('Only files with the following extensions are allowed: %files-allowed.', array('%files-allowed' => 'txt'));
-      $this->assertRaw($error_message, t('Validation error when file with wrong extension uploaded (JSMode=%type).', array('%type' => $type)));
+      $error_message = t('Only files with the following extensions are allowed: %files-allowed.', ['%files-allowed' => 'txt']);
+      $this->assertRaw($error_message, t('Validation error when file with wrong extension uploaded (JSMode=%type).', ['%type' => $type]));
 
       // Upload file with correct extension, check that error message is removed.
       $edit[$name] = drupal_realpath($test_file_text->getFileUri());
@@ -450,10 +450,10 @@ function testWidgetValidation() {
           break;
         case 'js':
           $button = $this->xpath('//input[@type="submit" and @value="' . t('Upload') . '"]');
-          $this->drupalPostAjaxForm(NULL, $edit, array((string) $button[0]['name'] => (string) $button[0]['value']));
+          $this->drupalPostAjaxForm(NULL, $edit, [(string) $button[0]['name'] => (string) $button[0]['value']]);
           break;
       }
-      $this->assertNoRaw($error_message, t('Validation error removed when file with correct extension uploaded (JSMode=%type).', array('%type' => $type)));
+      $this->assertNoRaw($error_message, t('Validation error removed when file with correct extension uploaded (JSMode=%type).', ['%type' => $type]));
     }
   }
 
@@ -498,11 +498,11 @@ public function testTemporaryFileRemovalExploit() {
     $victim_user = $this->drupalCreateUser();
 
     // Create an attacker user.
-    $attacker_user = $this->drupalCreateUser(array(
+    $attacker_user = $this->drupalCreateUser([
       'access content',
       'create article content',
       'edit any article content',
-    ));
+    ]);
 
     // Log in as the attacker user.
     $this->drupalLogin($attacker_user);
@@ -522,11 +522,11 @@ public function testTemporaryFileRemovalExploitAnonymous() {
     $attacker_user = User::getAnonymousUser();
 
     // Set up permissions for anonymous attacker user.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access content' => TRUE,
       'create article content' => TRUE,
       'edit any article content' => TRUE,
-    ));
+    ]);
 
     // Log out so as to be the anonymous attacker user.
     $this->drupalLogout();
@@ -549,7 +549,7 @@ protected function doTestTemporaryFileRemovalExploit(UserInterface $victim_user,
     $this->createFileField($field_name, 'node', $type_name);
 
     $test_file = $this->getTestFile('text');
-    foreach (array('nojs', 'js') as $type) {
+    foreach (['nojs', 'js'] as $type) {
       // Create a temporary file owned by the victim user. This will be as if
       // they had uploaded the file, but not saved the node they were editing
       // or creating.
@@ -567,7 +567,7 @@ protected function doTestTemporaryFileRemovalExploit(UserInterface $victim_user,
 
       // Attach a file to a node.
       $edit['files[' . $field_name . '_0]'] = $this->container->get('file_system')->realpath($test_file->getFileUri());
-      $this->drupalPostForm(Url::fromRoute('node.add', array('node_type' => $type_name)), $edit, t('Save'));
+      $this->drupalPostForm(Url::fromRoute('node.add', ['node_type' => $type_name]), $edit, t('Save'));
       $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
 
       /** @var \Drupal\file\FileInterface $node_file */
diff --git a/core/modules/file/src/Tests/FileListingTest.php b/core/modules/file/src/Tests/FileListingTest.php
index 708f1385f94dbb2d55d04d201d40ee2db00f7a88..e163529ed261eccfbe4b8a6d2b5fafcb9a1a7e82 100644
--- a/core/modules/file/src/Tests/FileListingTest.php
+++ b/core/modules/file/src/Tests/FileListingTest.php
@@ -18,7 +18,7 @@ class FileListingTest extends FileFieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('views', 'file', 'image', 'entity_test');
+  public static $modules = ['views', 'file', 'image', 'entity_test'];
 
   /**
    * An authenticated user.
@@ -30,9 +30,9 @@ class FileListingTest extends FileFieldTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('access files overview', 'bypass node access'));
+    $this->adminUser = $this->drupalCreateUser(['access files overview', 'bypass node access']);
     $this->baseUser = $this->drupalCreateUser();
-    $this->createFileField('file', 'node', 'article', array(), array('file_extensions' => 'txt png'));
+    $this->createFileField('file', 'node', 'article', [], ['file_extensions' => 'txt png']);
   }
 
   /**
@@ -70,7 +70,7 @@ function testFileListingPages() {
     $this->drupalLogin($this->adminUser);
 
     for ($i = 0; $i < 5; $i++) {
-      $nodes[] = $this->drupalCreateNode(array('type' => 'article'));
+      $nodes[] = $this->drupalCreateNode(['type' => 'article']);
     }
 
     $this->drupalGet('admin/content/files');
@@ -84,15 +84,15 @@ function testFileListingPages() {
 
     $this->drupalGet('admin/content/files/usage/' . $file->id());
     $this->assertResponse(200);
-    $this->assertTitle(t('File usage information for @file | Drupal', array('@file' => $file->getFilename())));
+    $this->assertTitle(t('File usage information for @file | Drupal', ['@file' => $file->getFilename()]));
 
     foreach ($nodes as &$node) {
       $this->drupalGet('node/' . $node->id() . '/edit');
       $file = $this->getTestFile('image');
 
-      $edit = array(
+      $edit = [
         'files[file_0]' => drupal_realpath($file->getFileUri()),
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save'));
       $node = Node::load($node->id());
     }
@@ -122,7 +122,7 @@ function testFileListingPages() {
     $usage = $this->sumUsages($file_usage->listUsage($file));
     $this->assertRaw('admin/content/files/usage/' . $file->id() . '">' . $usage);
 
-    $result = $this->xpath("//td[contains(@class, 'views-field-status') and contains(text(), :value)]", array(':value' => t('Temporary')));
+    $result = $this->xpath("//td[contains(@class, 'views-field-status') and contains(text(), :value)]", [':value' => t('Temporary')]);
     $this->assertEqual(1, count($result), 'Unused file marked as temporary.');
 
     // Test file usage page.
@@ -155,7 +155,7 @@ function testFileListingUsageNoLink() {
     // Create a bundle and attach a File field to the bundle.
     $bundle = $this->randomMachineName();
     entity_test_create_bundle($bundle, NULL, 'entity_test_constraints');
-    $this->createFileField('field_test_file', 'entity_test_constraints', $bundle, array(), array('file_extensions' => 'txt png'));
+    $this->createFileField('field_test_file', 'entity_test_constraints', $bundle, [], ['file_extensions' => 'txt png']);
 
     // Create file to attach to entity.
     $file = File::create([
@@ -169,18 +169,18 @@ function testFileListingUsageNoLink() {
 
     // Create entity and attach the created file.
     $entity_name = $this->randomMachineName();
-    $entity = EntityTestConstraints::create(array(
+    $entity = EntityTestConstraints::create([
       'uid' => 1,
       'name' => $entity_name,
       'type' => $bundle,
-      'field_test_file' => array(
+      'field_test_file' => [
         'target_id' => $file->id(),
-      ),
-    ));
+      ],
+    ]);
     $entity->save();
 
     // Create node entity and attach the created file.
-    $node = $this->drupalCreateNode(array('type' => 'article', 'file' => $file));
+    $node = $this->drupalCreateNode(['type' => 'article', 'file' => $file]);
     $node->save();
 
     // Load the file usage page for the created and attached file.
diff --git a/core/modules/file/src/Tests/FileManagedFileElementTest.php b/core/modules/file/src/Tests/FileManagedFileElementTest.php
index 07102a04df9605d04800753f1dad797aef14a683..994803e0be6d06af96fa293337c9c5b072f2cb99 100644
--- a/core/modules/file/src/Tests/FileManagedFileElementTest.php
+++ b/core/modules/file/src/Tests/FileManagedFileElementTest.php
@@ -21,16 +21,16 @@ function testManagedFile() {
     // Perform the tests with all permutations of $form['#tree'],
     // $element['#extended'], and $element['#multiple'].
     $test_file = $this->getTestFile('text');
-    foreach (array(0, 1) as $tree) {
-      foreach (array(0, 1) as $extended) {
-        foreach (array(0, 1) as $multiple) {
+    foreach ([0, 1] as $tree) {
+      foreach ([0, 1] as $extended) {
+        foreach ([0, 1] as $multiple) {
           $path = 'file/test/' . $tree . '/' . $extended . '/' . $multiple;
           $input_base_name = $tree ? 'nested_file' : 'file';
           $file_field_name = $multiple ? 'files[' . $input_base_name . '][]' : 'files[' . $input_base_name . ']';
 
           // Submit without a file.
-          $this->drupalPostForm($path, array(), t('Save'));
-          $this->assertRaw(t('The file ids are %fids.', array('%fids' => implode(',', array()))), 'Submitted without a file.');
+          $this->drupalPostForm($path, [], t('Save'));
+          $this->assertRaw(t('The file ids are %fids.', ['%fids' => implode(',', [])]), 'Submitted without a file.');
 
           // Submit with a file, but with an invalid form token. Ensure the file
           // was not saved.
@@ -46,22 +46,22 @@ function testManagedFile() {
 
           // Submit a new file, without using the Upload button.
           $last_fid_prior = $this->getLastFileId();
-          $edit = array($file_field_name => drupal_realpath($test_file->getFileUri()));
+          $edit = [$file_field_name => drupal_realpath($test_file->getFileUri())];
           $this->drupalPostForm($path, $edit, t('Save'));
           $last_fid = $this->getLastFileId();
           $this->assertTrue($last_fid > $last_fid_prior, 'New file got saved.');
-          $this->assertRaw(t('The file ids are %fids.', array('%fids' => implode(',', array($last_fid)))), 'Submit handler has correct file info.');
+          $this->assertRaw(t('The file ids are %fids.', ['%fids' => implode(',', [$last_fid])]), 'Submit handler has correct file info.');
 
           // Submit no new input, but with a default file.
-          $this->drupalPostForm($path . '/' . $last_fid, array(), t('Save'));
-          $this->assertRaw(t('The file ids are %fids.', array('%fids' => implode(',', array($last_fid)))), 'Empty submission did not change an existing file.');
+          $this->drupalPostForm($path . '/' . $last_fid, [], t('Save'));
+          $this->assertRaw(t('The file ids are %fids.', ['%fids' => implode(',', [$last_fid])]), 'Empty submission did not change an existing file.');
 
           // Now, test the Upload and Remove buttons, with and without Ajax.
-          foreach (array(FALSE, TRUE) as $ajax) {
+          foreach ([FALSE, TRUE] as $ajax) {
             // Upload, then Submit.
             $last_fid_prior = $this->getLastFileId();
             $this->drupalGet($path);
-            $edit = array($file_field_name => drupal_realpath($test_file->getFileUri()));
+            $edit = [$file_field_name => drupal_realpath($test_file->getFileUri())];
             if ($ajax) {
               $this->drupalPostAjaxForm(NULL, $edit, $input_base_name . '_upload_button');
             }
@@ -70,15 +70,15 @@ function testManagedFile() {
             }
             $last_fid = $this->getLastFileId();
             $this->assertTrue($last_fid > $last_fid_prior, 'New file got uploaded.');
-            $this->drupalPostForm(NULL, array(), t('Save'));
-            $this->assertRaw(t('The file ids are %fids.', array('%fids' => implode(',', array($last_fid)))), 'Submit handler has correct file info.');
+            $this->drupalPostForm(NULL, [], t('Save'));
+            $this->assertRaw(t('The file ids are %fids.', ['%fids' => implode(',', [$last_fid])]), 'Submit handler has correct file info.');
 
             // Remove, then Submit.
             $remove_button_title = $multiple ? t('Remove selected') : t('Remove');
-            $remove_edit = array();
+            $remove_edit = [];
             if ($multiple) {
               $selected_checkbox = ($tree ? 'nested[file]' : 'file') . '[file_' . $last_fid . '][selected]';
-              $remove_edit = array($selected_checkbox => '1');
+              $remove_edit = [$selected_checkbox => '1'];
             }
             $this->drupalGet($path . '/' . $last_fid);
             if ($ajax) {
@@ -87,22 +87,22 @@ function testManagedFile() {
             else {
               $this->drupalPostForm(NULL, $remove_edit, $remove_button_title);
             }
-            $this->drupalPostForm(NULL, array(), t('Save'));
-            $this->assertRaw(t('The file ids are %fids.', array('%fids' => '')), 'Submission after file removal was successful.');
+            $this->drupalPostForm(NULL, [], t('Save'));
+            $this->assertRaw(t('The file ids are %fids.', ['%fids' => '']), 'Submission after file removal was successful.');
 
             // Upload, then Remove, then Submit.
             $this->drupalGet($path);
-            $edit = array($file_field_name => drupal_realpath($test_file->getFileUri()));
+            $edit = [$file_field_name => drupal_realpath($test_file->getFileUri())];
             if ($ajax) {
               $this->drupalPostAjaxForm(NULL, $edit, $input_base_name . '_upload_button');
             }
             else {
               $this->drupalPostForm(NULL, $edit, t('Upload'));
             }
-            $remove_edit = array();
+            $remove_edit = [];
             if ($multiple) {
               $selected_checkbox = ($tree ? 'nested[file]' : 'file') . '[file_' . $this->getLastFileId() . '][selected]';
-              $remove_edit = array($selected_checkbox => '1');
+              $remove_edit = [$selected_checkbox => '1'];
             }
             if ($ajax) {
               $this->drupalPostAjaxForm(NULL, $remove_edit, $input_base_name . '_remove_button');
@@ -111,8 +111,8 @@ function testManagedFile() {
               $this->drupalPostForm(NULL, $remove_edit, $remove_button_title);
             }
 
-            $this->drupalPostForm(NULL, array(), t('Save'));
-            $this->assertRaw(t('The file ids are %fids.', array('%fids' => '')), 'Submission after file upload and removal was successful.');
+            $this->drupalPostForm(NULL, [], t('Save'));
+            $this->assertRaw(t('The file ids are %fids.', ['%fids' => '']), 'Submission after file upload and removal was successful.');
           }
         }
       }
@@ -120,8 +120,8 @@ function testManagedFile() {
 
     // The multiple file upload has additional conditions that need checking.
     $path = 'file/test/1/1/1';
-    $edit = array('files[nested_file][]' => drupal_realpath($test_file->getFileUri()));
-    $fid_list = array();
+    $edit = ['files[nested_file][]' => drupal_realpath($test_file->getFileUri())];
+    $fid_list = [];
 
     $this->drupalGet($path);
 
@@ -136,13 +136,13 @@ function testManagedFile() {
     $this->assertFieldByXpath('//input[@name="nested[file][file_' . $fid_list[1] . '][selected]"]', NULL, 'Second file successfully uploaded to multiple file element.');
 
     // Save the entire form.
-    $this->drupalPostForm(NULL, array(), t('Save'));
-    $this->assertRaw(t('The file ids are %fids.', array('%fids' => implode(',', $fid_list))), 'Two files saved into a single multiple file element.');
+    $this->drupalPostForm(NULL, [], t('Save'));
+    $this->assertRaw(t('The file ids are %fids.', ['%fids' => implode(',', $fid_list)]), 'Two files saved into a single multiple file element.');
 
     // Delete only the first file.
-    $edit = array(
+    $edit = [
       'nested[file][file_' . $fid_list[0] . '][selected]' => '1',
-    );
+    ];
     $this->drupalPostForm($path . '/' . implode(',', $fid_list), $edit, t('Remove selected'));
 
     // Check that the first file has been deleted but not the second.
@@ -181,7 +181,7 @@ public function testFileRemovedFromDisk() {
 
     $edit = [$file_field_name => drupal_realpath($test_file->getFileUri())];
     $this->drupalPostForm(NULL, $edit, t('Upload'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $fid = $this->getLastFileId();
     /** @var $file \Drupal\file\FileInterface */
diff --git a/core/modules/file/src/Tests/FileManagedTestBase.php b/core/modules/file/src/Tests/FileManagedTestBase.php
index 711d8a41f0221821aeb27033fb4ff6682341285f..8bd85bdc7ab6786b94137ac5846c88f92abb7e4d 100644
--- a/core/modules/file/src/Tests/FileManagedTestBase.php
+++ b/core/modules/file/src/Tests/FileManagedTestBase.php
@@ -20,7 +20,7 @@ abstract class FileManagedTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('file_test', 'file');
+  public static $modules = ['file_test', 'file'];
 
   protected function setUp() {
     parent::setUp();
@@ -45,16 +45,16 @@ function assertFileHooksCalled($expected) {
     // Determine if there were any expected that were not called.
     $uncalled = array_diff($expected, $actual);
     if (count($uncalled)) {
-      $this->assertTrue(FALSE, format_string('Expected hooks %expected to be called but %uncalled was not called.', array('%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled))));
+      $this->assertTrue(FALSE, format_string('Expected hooks %expected to be called but %uncalled was not called.', ['%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled)]));
     }
     else {
-      $this->assertTrue(TRUE, format_string('All the expected hooks were called: %expected', array('%expected' => empty($expected) ? '(none)' : implode(', ', $expected))));
+      $this->assertTrue(TRUE, format_string('All the expected hooks were called: %expected', ['%expected' => empty($expected) ? '(none)' : implode(', ', $expected)]));
     }
 
     // Determine if there were any unexpected calls.
     $unexpected = array_diff($actual, $expected);
     if (count($unexpected)) {
-      $this->assertTrue(FALSE, format_string('Unexpected hooks were called: %unexpected.', array('%unexpected' => empty($unexpected) ? '(none)' : implode(', ', $unexpected))));
+      $this->assertTrue(FALSE, format_string('Unexpected hooks were called: %unexpected.', ['%unexpected' => empty($unexpected) ? '(none)' : implode(', ', $unexpected)]));
     }
     else {
       $this->assertTrue(TRUE, 'No unexpected hooks were called.');
@@ -76,13 +76,13 @@ function assertFileHookCalled($hook, $expected_count = 1, $message = NULL) {
 
     if (!isset($message)) {
       if ($actual_count == $expected_count) {
-        $message = format_string('hook_file_@name was called correctly.', array('@name' => $hook));
+        $message = format_string('hook_file_@name was called correctly.', ['@name' => $hook]);
       }
       elseif ($expected_count == 0) {
-        $message = \Drupal::translation()->formatPlural($actual_count, 'hook_file_@name was not expected to be called but was actually called once.', 'hook_file_@name was not expected to be called but was actually called @count times.', array('@name' => $hook, '@count' => $actual_count));
+        $message = \Drupal::translation()->formatPlural($actual_count, 'hook_file_@name was not expected to be called but was actually called once.', 'hook_file_@name was not expected to be called but was actually called @count times.', ['@name' => $hook, '@count' => $actual_count]);
       }
       else {
-        $message = format_string('hook_file_@name was expected to be called %expected times but was called %actual times.', array('@name' => $hook, '%expected' => $expected_count, '%actual' => $actual_count));
+        $message = format_string('hook_file_@name was expected to be called %expected times but was called %actual times.', ['@name' => $hook, '%expected' => $expected_count, '%actual' => $actual_count]);
       }
     }
     $this->assertEqual($actual_count, $expected_count, $message);
@@ -97,13 +97,13 @@ function assertFileHookCalled($hook, $expected_count = 1, $message = NULL) {
    *   File object to compare.
    */
   function assertFileUnchanged(FileInterface $before, FileInterface $after) {
-    $this->assertEqual($before->id(), $after->id(), t('File id is the same: %file1 == %file2.', array('%file1' => $before->id(), '%file2' => $after->id())), 'File unchanged');
-    $this->assertEqual($before->getOwner()->id(), $after->getOwner()->id(), t('File owner is the same: %file1 == %file2.', array('%file1' => $before->getOwner()->id(), '%file2' => $after->getOwner()->id())), 'File unchanged');
-    $this->assertEqual($before->getFilename(), $after->getFilename(), t('File name is the same: %file1 == %file2.', array('%file1' => $before->getFilename(), '%file2' => $after->getFilename())), 'File unchanged');
-    $this->assertEqual($before->getFileUri(), $after->getFileUri(), t('File path is the same: %file1 == %file2.', array('%file1' => $before->getFileUri(), '%file2' => $after->getFileUri())), 'File unchanged');
-    $this->assertEqual($before->getMimeType(), $after->getMimeType(), t('File MIME type is the same: %file1 == %file2.', array('%file1' => $before->getMimeType(), '%file2' => $after->getMimeType())), 'File unchanged');
-    $this->assertEqual($before->getSize(), $after->getSize(), t('File size is the same: %file1 == %file2.', array('%file1' => $before->getSize(), '%file2' => $after->getSize())), 'File unchanged');
-    $this->assertEqual($before->isPermanent(), $after->isPermanent(), t('File status is the same: %file1 == %file2.', array('%file1' => $before->isPermanent(), '%file2' => $after->isPermanent())), 'File unchanged');
+    $this->assertEqual($before->id(), $after->id(), t('File id is the same: %file1 == %file2.', ['%file1' => $before->id(), '%file2' => $after->id()]), 'File unchanged');
+    $this->assertEqual($before->getOwner()->id(), $after->getOwner()->id(), t('File owner is the same: %file1 == %file2.', ['%file1' => $before->getOwner()->id(), '%file2' => $after->getOwner()->id()]), 'File unchanged');
+    $this->assertEqual($before->getFilename(), $after->getFilename(), t('File name is the same: %file1 == %file2.', ['%file1' => $before->getFilename(), '%file2' => $after->getFilename()]), 'File unchanged');
+    $this->assertEqual($before->getFileUri(), $after->getFileUri(), t('File path is the same: %file1 == %file2.', ['%file1' => $before->getFileUri(), '%file2' => $after->getFileUri()]), 'File unchanged');
+    $this->assertEqual($before->getMimeType(), $after->getMimeType(), t('File MIME type is the same: %file1 == %file2.', ['%file1' => $before->getMimeType(), '%file2' => $after->getMimeType()]), 'File unchanged');
+    $this->assertEqual($before->getSize(), $after->getSize(), t('File size is the same: %file1 == %file2.', ['%file1' => $before->getSize(), '%file2' => $after->getSize()]), 'File unchanged');
+    $this->assertEqual($before->isPermanent(), $after->isPermanent(), t('File status is the same: %file1 == %file2.', ['%file1' => $before->isPermanent(), '%file2' => $after->isPermanent()]), 'File unchanged');
   }
 
   /**
@@ -115,8 +115,8 @@ function assertFileUnchanged(FileInterface $before, FileInterface $after) {
    *   File object to compare.
    */
   function assertDifferentFile(FileInterface $file1, FileInterface $file2) {
-    $this->assertNotEqual($file1->id(), $file2->id(), t('Files have different ids: %file1 != %file2.', array('%file1' => $file1->id(), '%file2' => $file2->id())), 'Different file');
-    $this->assertNotEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have different paths: %file1 != %file2.', array('%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri())), 'Different file');
+    $this->assertNotEqual($file1->id(), $file2->id(), t('Files have different ids: %file1 != %file2.', ['%file1' => $file1->id(), '%file2' => $file2->id()]), 'Different file');
+    $this->assertNotEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have different paths: %file1 != %file2.', ['%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri()]), 'Different file');
   }
 
   /**
@@ -128,8 +128,8 @@ function assertDifferentFile(FileInterface $file1, FileInterface $file2) {
    *   File object to compare.
    */
   function assertSameFile(FileInterface $file1, FileInterface $file2) {
-    $this->assertEqual($file1->id(), $file2->id(), t('Files have the same ids: %file1 == %file2.', array('%file1' => $file1->id(), '%file2-fid' => $file2->id())), 'Same file');
-    $this->assertEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have the same path: %file1 == %file2.', array('%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri())), 'Same file');
+    $this->assertEqual($file1->id(), $file2->id(), t('Files have the same ids: %file1 == %file2.', ['%file1' => $file1->id(), '%file2-fid' => $file2->id()]), 'Same file');
+    $this->assertEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have the same path: %file1 == %file2.', ['%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri()]), 'Same file');
   }
 
   /**
diff --git a/core/modules/file/src/Tests/FileOnTranslatedEntityTest.php b/core/modules/file/src/Tests/FileOnTranslatedEntityTest.php
index 7987bcf3420ade881e9eaa7e961aec17c53c3362..5f1e7073df82c63f6b29922b433325dd7108dae4 100644
--- a/core/modules/file/src/Tests/FileOnTranslatedEntityTest.php
+++ b/core/modules/file/src/Tests/FileOnTranslatedEntityTest.php
@@ -14,7 +14,7 @@ class FileOnTranslatedEntityTest extends FileFieldTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language', 'content_translation');
+  public static $modules = ['language', 'content_translation'];
 
   /**
    * The name of the file field used in the test.
@@ -39,7 +39,7 @@ protected function setUp() {
     $this->createFileField($this->fieldName, 'node', 'page');
 
     // Create and log in user.
-    $permissions = array(
+    $permissions = [
       'access administration pages',
       'administer content translation',
       'administer content types',
@@ -49,25 +49,25 @@ protected function setUp() {
       'edit any page content',
       'translate any entity',
       'delete any page content',
-    );
+    ];
     $admin_user = $this->drupalCreateUser($permissions);
     $this->drupalLogin($admin_user);
 
     // Add a second and third language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'fr';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'nl';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Enable translation for "Basic page" nodes.
-    $edit = array(
+    $edit = [
       'entity_types[node]' => 1,
       'settings[node][page][translatable]' => 1,
       "settings[node][page][fields][$this->fieldName]" => 1,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
     \Drupal::entityManager()->clearCachedDefinitions();
   }
@@ -81,20 +81,20 @@ public function testSyncedFiles() {
     $this->assertTrue($definitions[$this->fieldName]->isTranslatable(), 'Node file field is translatable.');
 
     // Create a default language node.
-    $default_language_node = $this->drupalCreateNode(array('type' => 'page', 'title' => 'Lost in translation'));
+    $default_language_node = $this->drupalCreateNode(['type' => 'page', 'title' => 'Lost in translation']);
 
     // Edit the node to upload a file.
-    $edit = array();
+    $edit = [];
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('text')[0]->uri);
     $this->drupalPostForm('node/' . $default_language_node->id() . '/edit', $edit, t('Save'));
     $first_fid = $this->getLastFileId();
 
     // Translate the node into French: remove the existing file.
-    $this->drupalPostForm('node/' . $default_language_node->id() . '/translations/add/en/fr', array(), t('Remove'));
+    $this->drupalPostForm('node/' . $default_language_node->id() . '/translations/add/en/fr', [], t('Remove'));
 
     // Upload a different file.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = 'Bill Murray';
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('text')[1]->uri);
@@ -117,10 +117,10 @@ public function testSyncedFiles() {
     $this->assertTrue($file->isPermanent());
 
     // Translate the node into dutch: remove the existing file.
-    $this->drupalPostForm('node/' . $default_language_node->id() . '/translations/add/en/nl', array(), t('Remove'));
+    $this->drupalPostForm('node/' . $default_language_node->id() . '/translations/add/en/nl', [], t('Remove'));
 
     // Upload a different file.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = 'Scarlett Johansson';
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('text')[2]->uri);
@@ -145,10 +145,10 @@ public function testSyncedFiles() {
     $this->assertTrue($file->isPermanent());
 
     // Edit the second translation: remove the existing file.
-    $this->drupalPostForm('fr/node/' . $default_language_node->id() . '/edit', array(), t('Remove'));
+    $this->drupalPostForm('fr/node/' . $default_language_node->id() . '/edit', [], t('Remove'));
 
     // Upload a different file.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = 'David Bowie';
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('text')[3]->uri);
@@ -169,7 +169,7 @@ public function testSyncedFiles() {
     $this->assertTrue($file->isPermanent());
 
     // Delete the third translation.
-    $this->drupalPostForm('nl/node/' . $default_language_node->id() . '/delete', array(), t('Delete Dutch translation'));
+    $this->drupalPostForm('nl/node/' . $default_language_node->id() . '/delete', [], t('Delete Dutch translation'));
 
     \Drupal::entityTypeManager()->getStorage('file')->resetCache();
 
@@ -185,7 +185,7 @@ public function testSyncedFiles() {
     $this->assertTrue($file->isTemporary());
 
     // Delete the all translations.
-    $this->drupalPostForm('node/' . $default_language_node->id() . '/delete', array(), t('Delete all translations'));
+    $this->drupalPostForm('node/' . $default_language_node->id() . '/delete', [], t('Delete all translations'));
 
     \Drupal::entityTypeManager()->getStorage('file')->resetCache();
 
diff --git a/core/modules/file/src/Tests/FilePrivateTest.php b/core/modules/file/src/Tests/FilePrivateTest.php
index 2705ef205b61e8c0550972ab2e8f186007bfe2e0..9ed4a9e68d5d5dec1bd0e1c2835508d26bb81a71 100644
--- a/core/modules/file/src/Tests/FilePrivateTest.php
+++ b/core/modules/file/src/Tests/FilePrivateTest.php
@@ -19,7 +19,7 @@ class FilePrivateTest extends FileFieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_access_test', 'field_test');
+  public static $modules = ['node_access_test', 'field_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -35,11 +35,11 @@ function testPrivateFile() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $type_name = 'article';
     $field_name = strtolower($this->randomMachineName());
-    $this->createFileField($field_name, 'node', $type_name, array('uri_scheme' => 'private'));
+    $this->createFileField($field_name, 'node', $type_name, ['uri_scheme' => 'private']);
 
     $test_file = $this->getTestFile('text');
-    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name, TRUE, array('private' => TRUE));
-    \Drupal::entityManager()->getStorage('node')->resetCache(array($nid));
+    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name, TRUE, ['private' => TRUE]);
+    \Drupal::entityManager()->getStorage('node')->resetCache([$nid]);
     /* @var \Drupal\node\NodeInterface $node */
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$field_name}->target_id);
@@ -56,11 +56,11 @@ function testPrivateFile() {
     // Create a field with no view access. See
     // field_test_entity_field_access().
     $no_access_field_name = 'field_no_view_access';
-    $this->createFileField($no_access_field_name, 'node', $type_name, array('uri_scheme' => 'private'));
+    $this->createFileField($no_access_field_name, 'node', $type_name, ['uri_scheme' => 'private']);
     // Test with the field that should deny access through field access.
     $this->drupalLogin($this->adminUser);
-    $nid = $this->uploadNodeFile($test_file, $no_access_field_name, $type_name, TRUE, array('private' => TRUE));
-    \Drupal::entityManager()->getStorage('node')->resetCache(array($nid));
+    $nid = $this->uploadNodeFile($test_file, $no_access_field_name, $type_name, TRUE, ['private' => TRUE]);
+    \Drupal::entityManager()->getStorage('node')->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $node_file = File::load($node->{$no_access_field_name}->target_id);
 
@@ -70,7 +70,7 @@ function testPrivateFile() {
     $this->assertResponse(403, 'Confirmed that access is denied for the file without view field access permission.');
 
     // Attempt to reuse the file when editing a node.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $this->drupalPostForm('node/add/' . $type_name, $edit, t('Save and publish'));
     $new_node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
@@ -80,17 +80,17 @@ function testPrivateFile() {
     $this->assertUrl('node/' . $new_node->id() . '/edit');
     // Check that we got the expected constraint form error.
     $constraint = new ReferenceAccessConstraint();
-    $this->assertRaw(SafeMarkup::format($constraint->message, array('%type' => 'file', '%id' => $node_file->id())));
+    $this->assertRaw(SafeMarkup::format($constraint->message, ['%type' => 'file', '%id' => $node_file->id()]));
     // Attempt to reuse the existing file when creating a new node, and confirm
     // that access is still denied.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $edit[$field_name . '[0][fids]'] = $node_file->id();
     $this->drupalPostForm('node/add/' . $type_name, $edit, t('Save and publish'));
     $new_node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
     $this->assertTrue(empty($new_node), 'Node was not created.');
     $this->assertUrl('node/add/' . $type_name);
-    $this->assertRaw(SafeMarkup::format($constraint->message, array('%type' => 'file', '%id' => $node_file->id())));
+    $this->assertRaw(SafeMarkup::format($constraint->message, ['%type' => 'file', '%id' => $node_file->id()]));
 
     // Now make file_test_file_download() return everything.
     \Drupal::state()->set('file_test.allow_all', TRUE);
diff --git a/core/modules/file/src/Tests/FileTokenReplaceTest.php b/core/modules/file/src/Tests/FileTokenReplaceTest.php
index dfb9e51d49c6bc49c7258c3870f69e685ff822b7..143ded4b60365cf525cbde5c241af2e552f2fd5b 100644
--- a/core/modules/file/src/Tests/FileTokenReplaceTest.php
+++ b/core/modules/file/src/Tests/FileTokenReplaceTest.php
@@ -35,12 +35,12 @@ function testFileTokenReplacement() {
     $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
 
     // Load the node and the file.
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $file = File::load($node->{$field_name}->target_id);
 
     // Generate and test sanitized tokens.
-    $tests = array();
+    $tests = [];
     $tests['[file:fid]'] = $file->id();
     $tests['[file:name]'] = Html::escape($file->getFilename());
     $tests['[file:path]'] = Html::escape($file->getFileUri());
@@ -77,8 +77,8 @@ function testFileTokenReplacement() {
 
     foreach ($tests as $input => $expected) {
       $bubbleable_metadata = new BubbleableMetadata();
-      $output = $token_service->replace($input, array('file' => $file), array('langcode' => $language_interface->getId()), $bubbleable_metadata);
-      $this->assertEqual($output, $expected, format_string('Sanitized file token %token replaced.', array('%token' => $input)));
+      $output = $token_service->replace($input, ['file' => $file], ['langcode' => $language_interface->getId()], $bubbleable_metadata);
+      $this->assertEqual($output, $expected, format_string('Sanitized file token %token replaced.', ['%token' => $input]));
       $this->assertEqual($bubbleable_metadata, $metadata_tests[$input]);
     }
 
@@ -89,8 +89,8 @@ function testFileTokenReplacement() {
     $tests['[file:size]'] = format_size($file->getSize());
 
     foreach ($tests as $input => $expected) {
-      $output = $token_service->replace($input, array('file' => $file), array('langcode' => $language_interface->getId(), 'sanitize' => FALSE));
-      $this->assertEqual($output, $expected, format_string('Unsanitized file token %token replaced.', array('%token' => $input)));
+      $output = $token_service->replace($input, ['file' => $file], ['langcode' => $language_interface->getId(), 'sanitize' => FALSE]);
+      $this->assertEqual($output, $expected, format_string('Unsanitized file token %token replaced.', ['%token' => $input]));
     }
   }
 
diff --git a/core/modules/file/src/Tests/PrivateFileOnTranslatedEntityTest.php b/core/modules/file/src/Tests/PrivateFileOnTranslatedEntityTest.php
index 15039edcbd7e1ba665e7edb1d7832e0e7d806b8d..da5abb5bd73aab02dc391af18d6e0746fa5737e2 100644
--- a/core/modules/file/src/Tests/PrivateFileOnTranslatedEntityTest.php
+++ b/core/modules/file/src/Tests/PrivateFileOnTranslatedEntityTest.php
@@ -15,7 +15,7 @@ class PrivateFileOnTranslatedEntityTest extends FileFieldTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language', 'content_translation');
+  public static $modules = ['language', 'content_translation'];
 
   /**
    * The name of the file field used in the test.
@@ -31,14 +31,14 @@ protected function setUp() {
     parent::setUp();
 
     // Create the "Basic page" node type.
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     // Create a file field on the "Basic page" node type.
     $this->fieldName = strtolower($this->randomMachineName());
-    $this->createFileField($this->fieldName, 'node', 'page', array('uri_scheme' => 'private'));
+    $this->createFileField($this->fieldName, 'node', 'page', ['uri_scheme' => 'private']);
 
     // Create and log in user.
-    $permissions = array(
+    $permissions = [
       'access administration pages',
       'administer content translation',
       'administer content types',
@@ -47,21 +47,21 @@ protected function setUp() {
       'create page content',
       'edit any page content',
       'translate any entity',
-    );
+    ];
     $admin_user = $this->drupalCreateUser($permissions);
     $this->drupalLogin($admin_user);
 
     // Add a second language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'fr';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Enable translation for "Basic page" nodes.
-    $edit = array(
+    $edit = [
       'entity_types[node]' => 1,
       'settings[node][page][translatable]' => 1,
       "settings[node][page][fields][$this->fieldName]" => 1,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
     \Drupal::entityManager()->clearCachedDefinitions();
   }
@@ -75,10 +75,10 @@ public function testPrivateLanguageFile() {
     $this->assertTrue($definitions[$this->fieldName]->isTranslatable(), 'Node file field is translatable.');
 
     // Create a default language node.
-    $default_language_node = $this->drupalCreateNode(array('type' => 'page'));
+    $default_language_node = $this->drupalCreateNode(['type' => 'page']);
 
     // Edit the node to upload a file.
-    $edit = array();
+    $edit = [];
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('text')[0]->uri);
     $this->drupalPostForm('node/' . $default_language_node->id() . '/edit', $edit, t('Save'));
@@ -88,7 +88,7 @@ public function testPrivateLanguageFile() {
     $this->rebuildContainer();
 
     // Ensure the file can be downloaded.
-    \Drupal::entityManager()->getStorage('node')->resetCache(array($default_language_node->id()));
+    \Drupal::entityManager()->getStorage('node')->resetCache([$default_language_node->id()]);
     $node = Node::load($default_language_node->id());
     $node_file = File::load($node->{$this->fieldName}->target_id);
     $this->drupalGet(file_create_url($node_file->getFileUri()));
@@ -99,10 +99,10 @@ public function testPrivateLanguageFile() {
     $this->clickLink(t('Add'));
 
     // Remove the existing file.
-    $this->drupalPostForm(NULL, array(), t('Remove'));
+    $this->drupalPostForm(NULL, [], t('Remove'));
 
     // Upload a different file.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('text')[1]->uri);
@@ -110,7 +110,7 @@ public function testPrivateLanguageFile() {
     $last_fid = $this->getLastFileId();
 
     // Verify the translation was created.
-    \Drupal::entityManager()->getStorage('node')->resetCache(array($default_language_node->id()));
+    \Drupal::entityManager()->getStorage('node')->resetCache([$default_language_node->id()]);
     $default_language_node = Node::load($default_language_node->id());
     $this->assertTrue($default_language_node->hasTranslation('fr'), 'Node found in database.');
     $this->assertTrue($last_fid > $last_fid_prior, 'New file got saved.');
diff --git a/core/modules/file/src/Tests/RemoteFileSaveUploadTest.php b/core/modules/file/src/Tests/RemoteFileSaveUploadTest.php
index b1ee6a65de1f23dbd83d459e7bf2103d4fd13909..d468ed326f57edef5c2896580b4cd0fd172c1af0 100644
--- a/core/modules/file/src/Tests/RemoteFileSaveUploadTest.php
+++ b/core/modules/file/src/Tests/RemoteFileSaveUploadTest.php
@@ -14,7 +14,7 @@ class RemoteFileSaveUploadTest extends SaveUploadTest {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   protected function setUp() {
     parent::setUp();
diff --git a/core/modules/file/src/Tests/SaveUploadTest.php b/core/modules/file/src/Tests/SaveUploadTest.php
index 3aaa5cff0493294f584d544725affeaf8a978f46..14071737f0b163aee954103d84ab97950c48b51f 100644
--- a/core/modules/file/src/Tests/SaveUploadTest.php
+++ b/core/modules/file/src/Tests/SaveUploadTest.php
@@ -15,7 +15,7 @@ class SaveUploadTest extends FileManagedTestBase {
    *
    * @var array
    */
-  public static $modules = array('dblog');
+  public static $modules = ['dblog'];
 
   /**
    * An image file path for uploading.
@@ -43,7 +43,7 @@ class SaveUploadTest extends FileManagedTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $account = $this->drupalCreateUser(array('access site reports'));
+    $account = $this->drupalCreateUser(['access site reports']);
     $this->drupalLogin($account);
 
     $image_files = $this->drupalGetTestFiles('image');
@@ -58,17 +58,17 @@ protected function setUp() {
     $this->maxFidBefore = db_query('SELECT MAX(fid) AS fid FROM {file_managed}')->fetchField();
 
     // Upload with replace to guarantee there's something there.
-    $edit = array(
+    $edit = [
       'file_test_replace' => FILE_EXISTS_REPLACE,
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri()),
-    );
+    ];
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called then clean out the hook
     // counters.
-    $this->assertFileHooksCalled(array('validate', 'insert'));
+    $this->assertFileHooksCalled(['validate', 'insert']);
     file_test_reset();
   }
 
@@ -88,14 +88,14 @@ function testNormal() {
 
     // Upload a second file.
     $image2 = current($this->drupalGetTestFiles('image'));
-    $edit = array('files[file_test_upload]' => drupal_realpath($image2->uri));
+    $edit = ['files[file_test_upload]' => drupal_realpath($image2->uri)];
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertRaw(t('You WIN!'));
     $max_fid_after = db_query('SELECT MAX(fid) AS fid FROM {file_managed}')->fetchField();
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'insert'));
+    $this->assertFileHooksCalled(['validate', 'insert']);
 
     $file2 = File::load($max_fid_after);
     $this->assertTrue($file2, 'Loaded the file');
@@ -103,7 +103,7 @@ function testNormal() {
     $this->assertEqual(substr($file2->getMimeType(), 0, 5), 'image', 'A MIME type was set.');
 
     // Load both files using File::loadMultiple().
-    $files = File::loadMultiple(array($file1->id(), $file2->id()));
+    $files = File::loadMultiple([$file1->id(), $file2->id()]);
     $this->assertTrue(isset($files[$file1->id()]), 'File was loaded successfully');
     $this->assertTrue(isset($files[$file2->id()]), 'File was loaded successfully');
 
@@ -111,10 +111,10 @@ function testNormal() {
     $image3 = current($this->drupalGetTestFiles('image'));
     $image3_realpath = drupal_realpath($image3->uri);
     $dir = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'files[file_test_upload]' => $image3_realpath,
       'file_subdir' => $dir,
-    );
+    ];
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertRaw(t('You WIN!'));
@@ -130,11 +130,11 @@ function testHandleExtension() {
     // implicitly tested at the testNormal() test. Here we tell
     // file_save_upload() to only allow ".foo".
     $extensions = 'foo';
-    $edit = array(
+    $edit = [
       'file_test_replace' => FILE_EXISTS_REPLACE,
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri()),
       'extensions' => $extensions,
-    );
+    ];
 
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
@@ -143,18 +143,18 @@ function testHandleExtension() {
     $this->assertRaw(t('Epic upload FAIL!'), 'Found the failure message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate'));
+    $this->assertFileHooksCalled(['validate']);
 
     // Reset the hook counters.
     file_test_reset();
 
     $extensions = 'foo ' . $this->imageExtension;
     // Now tell file_save_upload() to allow the extension of our test image.
-    $edit = array(
+    $edit = [
       'file_test_replace' => FILE_EXISTS_REPLACE,
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri()),
       'extensions' => $extensions,
-    );
+    ];
 
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
@@ -162,24 +162,24 @@ function testHandleExtension() {
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'load', 'update'));
+    $this->assertFileHooksCalled(['validate', 'load', 'update']);
 
     // Reset the hook counters.
     file_test_reset();
 
     // Now tell file_save_upload() to allow any extension.
-    $edit = array(
+    $edit = [
       'file_test_replace' => FILE_EXISTS_REPLACE,
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri()),
       'allow_all_extensions' => TRUE,
-    );
+    ];
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertNoRaw(t('Only files with the following extensions are allowed:'), 'Can upload any extension.');
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'load', 'update'));
+    $this->assertFileHooksCalled(['validate', 'load', 'update']);
   }
 
   /**
@@ -189,12 +189,12 @@ function testHandleDangerousFile() {
     $config = $this->config('system.file');
     // Allow the .php extension and make sure it gets renamed to .txt for
     // safety. Also check to make sure its MIME type was changed.
-    $edit = array(
+    $edit = [
       'file_test_replace' => FILE_EXISTS_REPLACE,
       'files[file_test_upload]' => drupal_realpath($this->phpfile->uri),
       'is_image_file' => FALSE,
       'extensions' => 'php',
-    );
+    ];
 
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
@@ -204,7 +204,7 @@ function testHandleDangerousFile() {
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'insert'));
+    $this->assertFileHooksCalled(['validate', 'insert']);
 
     // Ensure dangerous files are not renamed when insecure uploads is TRUE.
     // Turn on insecure uploads.
@@ -215,11 +215,11 @@ function testHandleDangerousFile() {
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertNoRaw(t('For security reasons, your upload has been renamed'), 'Found no security message.');
-    $this->assertRaw(t('File name is @filename', array('@filename' => $this->phpfile->filename)), 'Dangerous file was not renamed when insecure uploads is TRUE.');
+    $this->assertRaw(t('File name is @filename', ['@filename' => $this->phpfile->filename]), 'Dangerous file was not renamed when insecure uploads is TRUE.');
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'insert'));
+    $this->assertFileHooksCalled(['validate', 'insert']);
 
     // Turn off insecure uploads.
     $config->set('allow_insecure_uploads', 0)->save();
@@ -237,10 +237,10 @@ function testHandleFileMunge() {
     file_test_reset();
 
     $extensions = $this->imageExtension;
-    $edit = array(
+    $edit = [
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri()),
       'extensions' => $extensions,
-    );
+    ];
 
     $munged_filename = $this->image->getFilename();
     $munged_filename = substr($munged_filename, 0, strrpos($munged_filename, '.'));
@@ -249,84 +249,84 @@ function testHandleFileMunge() {
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertRaw(t('For security reasons, your upload has been renamed'), 'Found security message.');
-    $this->assertRaw(t('File name is @filename', array('@filename' => $munged_filename)), 'File was successfully munged.');
+    $this->assertRaw(t('File name is @filename', ['@filename' => $munged_filename]), 'File was successfully munged.');
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'insert'));
+    $this->assertFileHooksCalled(['validate', 'insert']);
 
     // Ensure we don't munge files if we're allowing any extension.
     // Reset the hook counters.
     file_test_reset();
 
-    $edit = array(
+    $edit = [
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri()),
       'allow_all_extensions' => TRUE,
-    );
+    ];
 
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertNoRaw(t('For security reasons, your upload has been renamed'), 'Found no security message.');
-    $this->assertRaw(t('File name is @filename', array('@filename' => $this->image->getFilename())), 'File was not munged when allowing any extension.');
+    $this->assertRaw(t('File name is @filename', ['@filename' => $this->image->getFilename()]), 'File was not munged when allowing any extension.');
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'insert'));
+    $this->assertFileHooksCalled(['validate', 'insert']);
   }
 
   /**
    * Test renaming when uploading over a file that already exists.
    */
   function testExistingRename() {
-    $edit = array(
+    $edit = [
       'file_test_replace' => FILE_EXISTS_RENAME,
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri())
-    );
+    ];
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'insert'));
+    $this->assertFileHooksCalled(['validate', 'insert']);
   }
 
   /**
    * Test replacement when uploading over a file that already exists.
    */
   function testExistingReplace() {
-    $edit = array(
+    $edit = [
       'file_test_replace' => FILE_EXISTS_REPLACE,
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri())
-    );
+    ];
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertRaw(t('You WIN!'), 'Found the success message.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('validate', 'load', 'update'));
+    $this->assertFileHooksCalled(['validate', 'load', 'update']);
   }
 
   /**
    * Test for failure when uploading over a file that already exists.
    */
   function testExistingError() {
-    $edit = array(
+    $edit = [
       'file_test_replace' => FILE_EXISTS_ERROR,
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri())
-    );
+    ];
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
     $this->assertResponse(200, 'Received a 200 response for posted test file.');
     $this->assertRaw(t('Epic upload FAIL!'), 'Found the failure message.');
 
     // Check that the no hooks were called while failing.
-    $this->assertFileHooksCalled(array());
+    $this->assertFileHooksCalled([]);
   }
 
   /**
    * Test for no failures when not uploading a file.
    */
   function testNoUpload() {
-    $this->drupalPostForm('file-test/upload', array(), t('Submit'));
+    $this->drupalPostForm('file-test/upload', [], t('Submit'));
     $this->assertNoRaw(t('Epic upload FAIL!'), 'Failure message not found.');
   }
 
@@ -339,10 +339,10 @@ function testDrupalMovingUploadedFileError() {
     drupal_mkdir('temporary://' . $test_directory, 0000);
     $this->assertTrue(is_dir('temporary://' . $test_directory));
 
-    $edit = array(
+    $edit = [
       'file_subdir' => $test_directory,
       'files[file_test_upload]' => drupal_realpath($this->image->getFileUri())
-    );
+    ];
 
     \Drupal::state()->set('file_test.disable_error_collection', TRUE);
     $this->drupalPostForm('file-test/upload', $edit, t('Submit'));
@@ -353,10 +353,10 @@ function testDrupalMovingUploadedFileError() {
     // Uploading failed. Now check the log.
     $this->drupalGet('admin/reports/dblog');
     $this->assertResponse(200);
-    $this->assertRaw(t('Upload error. Could not move uploaded file @file to destination @destination.', array(
+    $this->assertRaw(t('Upload error. Could not move uploaded file @file to destination @destination.', [
       '@file' => $this->image->getFilename(),
       '@destination' => 'temporary://' . $test_directory . '/' . $this->image->getFilename()
-    )), 'Found upload error log entry.');
+    ]), 'Found upload error log entry.');
   }
 
 }
diff --git a/core/modules/file/src/Tests/Views/RelationshipUserFileDataTest.php b/core/modules/file/src/Tests/Views/RelationshipUserFileDataTest.php
index db49ae1e1dde3a39dc522b9ae647ea3ab80db93d..6a5f53b5d368d152d1c6942b9168f43bd9f7f5eb 100644
--- a/core/modules/file/src/Tests/Views/RelationshipUserFileDataTest.php
+++ b/core/modules/file/src/Tests/Views/RelationshipUserFileDataTest.php
@@ -21,25 +21,25 @@ class RelationshipUserFileDataTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('file', 'file_test_views', 'user');
+  public static $modules = ['file', 'file_test_views', 'user'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_file_user_file_data');
+  public static $testViews = ['test_file_user_file_data'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create the user profile field and instance.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'user',
       'field_name' => 'user_file',
       'type' => 'file',
       'translatable' => '0',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'label' => 'User File',
       'description' => '',
@@ -49,7 +49,7 @@ protected function setUp() {
       'required' => 0,
     ])->save();
 
-    ViewTestData::createTestViews(get_class($this), array('file_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['file_test_views']);
   }
 
   /**
@@ -84,12 +84,12 @@ public function testViewsHandlerRelationshipUserFileData() {
     ];
     $this->assertIdentical($expected, $view->getDependencies());
     $this->executeView($view);
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'file_managed_user__user_file_fid' => '2',
-      ),
-    );
-    $column_map = array('file_managed_user__user_file_fid' => 'file_managed_user__user_file_fid');
+      ],
+    ];
+    $column_map = ['file_managed_user__user_file_fid' => 'file_managed_user__user_file_fid'];
     $this->assertIdenticalResultset($view, $expected_result, $column_map);
   }
 
diff --git a/core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php b/core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php
index 760a4f4fd4e9be0146817bb05372d779b11a61a3..9dc9d3595e6f33ccac03451610cdff3de2380d40 100644
--- a/core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php
+++ b/core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php
@@ -36,7 +36,7 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state, $tree = TRUE, $extended = TRUE, $multiple = FALSE, $default_fids = NULL) {
     $form['#tree'] = (bool) $tree;
 
-    $form['nested']['file'] = array(
+    $form['nested']['file'] = [
       '#type' => 'managed_file',
       '#title' => $this->t('Managed <em>@type</em>', ['@type' => 'file & butter']),
       '#upload_location' => 'public://test',
@@ -44,21 +44,21 @@ public function buildForm(array $form, FormStateInterface $form_state, $tree = T
       '#extended' => (bool) $extended,
       '#size' => 13,
       '#multiple' => (bool) $multiple,
-    );
+    ];
     if ($default_fids) {
       $default_fids = explode(',', $default_fids);
-      $form['nested']['file']['#default_value'] = $extended ? array('fids' => $default_fids) : $default_fids;
+      $form['nested']['file']['#default_value'] = $extended ? ['fids' => $default_fids] : $default_fids;
     }
 
-    $form['textfield'] = array(
+    $form['textfield'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Type a value and ensure it stays'),
-    );
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
-    );
+    ];
 
     return $form;
   }
@@ -68,7 +68,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $tree = T
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     if ($form['#tree']) {
-      $uploads = $form_state->getValue(array('nested', 'file'));
+      $uploads = $form_state->getValue(['nested', 'file']);
     }
     else {
       $uploads = $form_state->getValue('file');
@@ -78,12 +78,12 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $uploads = $uploads['fids'];
     }
 
-    $fids = array();
+    $fids = [];
     foreach ($uploads as $fid) {
       $fids[] = $fid;
     }
 
-    drupal_set_message($this->t('The file ids are %fids.', array('%fids' => implode(',', $fids))));
+    drupal_set_message($this->t('The file ids are %fids.', ['%fids' => implode(',', $fids)]));
   }
 
 }
diff --git a/core/modules/file/tests/file_test/file_test.module b/core/modules/file/tests/file_test/file_test.module
index 4a6fbcbdbaf3ef8f060a70a589029ad5f71ca81e..0baa0cbd0845d440b9128e74c7a50bbc6b45daa6 100644
--- a/core/modules/file/tests/file_test/file_test.module
+++ b/core/modules/file/tests/file_test/file_test.module
@@ -21,23 +21,23 @@
  */
 function file_test_reset() {
   // Keep track of calls to these hooks
-  $results = array(
-    'load' => array(),
-    'validate' => array(),
-    'download' => array(),
-    'insert' => array(),
-    'update' => array(),
-    'copy' => array(),
-    'move' => array(),
-    'delete' => array(),
-  );
+  $results = [
+    'load' => [],
+    'validate' => [],
+    'download' => [],
+    'insert' => [],
+    'update' => [],
+    'copy' => [],
+    'move' => [],
+    'delete' => [],
+  ];
   \Drupal::state()->set('file_test.results', $results);
 
   // These hooks will return these values, see file_test_set_return().
-  $return = array(
-    'validate' => array(),
+  $return = [
+    'validate' => [],
     'download' => NULL,
-  );
+  ];
   \Drupal::state()->set('file_test.return', $return);
 }
 
@@ -56,7 +56,7 @@ function file_test_reset() {
  * @see file_test_reset()
  */
 function file_test_get_calls($op) {
-  $results = \Drupal::state()->get('file_test.results') ?: array();
+  $results = \Drupal::state()->get('file_test.results') ?: [];
   return $results[$op];
 }
 
@@ -69,7 +69,7 @@ function file_test_get_calls($op) {
  *   passed to each call.
  */
 function file_test_get_all_calls() {
-  return \Drupal::state()->get('file_test.results') ?: array();
+  return \Drupal::state()->get('file_test.results') ?: [];
 }
 
 /**
@@ -86,7 +86,7 @@ function file_test_get_all_calls() {
  */
 function _file_test_log_call($op, $args) {
   if (\Drupal::state()->get('file_test.count_hook_invocations', TRUE)) {
-    $results = \Drupal::state()->get('file_test.results') ?: array();
+    $results = \Drupal::state()->get('file_test.results') ?: [];
     $results[$op][] = $args;
     \Drupal::state()->set('file_test.results', $results);
   }
@@ -105,7 +105,7 @@ function _file_test_log_call($op, $args) {
  * @see file_test_reset()
  */
 function _file_test_get_return($op) {
-  $return = \Drupal::state()->get('file_test.return') ?: array($op => NULL);
+  $return = \Drupal::state()->get('file_test.return') ?: [$op => NULL];
   return $return[$op];
 }
 
@@ -121,7 +121,7 @@ function _file_test_get_return($op) {
  * @see file_test_reset()
  */
 function file_test_set_return($op, $value) {
-  $return = \Drupal::state()->get('file_test.return') ?: array();
+  $return = \Drupal::state()->get('file_test.return') ?: [];
   $return[$op] = $value;
   \Drupal::state()->set('file_test.return', $return);
 }
@@ -131,7 +131,7 @@ function file_test_set_return($op, $value) {
  */
 function file_test_file_load($files) {
   foreach ($files as $file) {
-    _file_test_log_call('load', array($file->id()));
+    _file_test_log_call('load', [$file->id()]);
     // Assign a value on the object so that we can test that the $file is passed
     // by reference.
     $file->file_test['loaded'] = TRUE;
@@ -142,7 +142,7 @@ function file_test_file_load($files) {
  * Implements hook_file_validate().
  */
 function file_test_file_validate(File $file) {
-  _file_test_log_call('validate', array($file->id()));
+  _file_test_log_call('validate', [$file->id()]);
   return _file_test_get_return('validate');
 }
 
@@ -151,11 +151,11 @@ function file_test_file_validate(File $file) {
  */
 function file_test_file_download($uri) {
   if (\Drupal::state()->get('file_test.allow_all', FALSE)) {
-    $files = entity_load_multiple_by_properties('file', array('uri' => $uri));
+    $files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
     $file = reset($files);
     return file_get_content_headers($file);
   }
-  _file_test_log_call('download', array($uri));
+  _file_test_log_call('download', [$uri]);
   return _file_test_get_return('download');
 }
 
@@ -163,35 +163,35 @@ function file_test_file_download($uri) {
  * Implements hook_ENTITY_TYPE_insert() for file entities.
  */
 function file_test_file_insert(File $file) {
-  _file_test_log_call('insert', array($file->id()));
+  _file_test_log_call('insert', [$file->id()]);
 }
 
 /**
  * Implements hook_ENTITY_TYPE_update() for file entities.
  */
 function file_test_file_update(File $file) {
-  _file_test_log_call('update', array($file->id()));
+  _file_test_log_call('update', [$file->id()]);
 }
 
 /**
  * Implements hook_file_copy().
  */
 function file_test_file_copy(File $file, $source) {
-  _file_test_log_call('copy', array($file->id(), $source->id()));
+  _file_test_log_call('copy', [$file->id(), $source->id()]);
 }
 
 /**
  * Implements hook_file_move().
  */
 function file_test_file_move(File $file, File $source) {
-  _file_test_log_call('move', array($file->id(), $source->id()));
+  _file_test_log_call('move', [$file->id(), $source->id()]);
 }
 
 /**
  * Implements hook_ENTITY_TYPE_predelete() for file entities.
  */
 function file_test_file_predelete(File $file) {
-  _file_test_log_call('delete', array($file->id()));
+  _file_test_log_call('delete', [$file->id()]);
 }
 
 /**
@@ -206,11 +206,11 @@ function file_test_file_url_alter(&$uri) {
   }
   // Test alteration of file URLs to use a CDN.
   elseif ($alter_mode == 'cdn') {
-    $cdn_extensions = array('css', 'js', 'gif', 'jpg', 'jpeg', 'png');
+    $cdn_extensions = ['css', 'js', 'gif', 'jpg', 'jpeg', 'png'];
 
     // Most CDNs don't support private file transfers without a lot of hassle,
     // so don't support this in the common case.
-    $schemes = array('public');
+    $schemes = ['public'];
 
     $scheme = file_uri_scheme($uri);
 
@@ -323,7 +323,7 @@ function file_test_validator(File $file, $errors) {
  *   If $filepath is NULL, an array of all previous $filepath parameters
  */
 function file_test_file_scan_callback($filepath = NULL) {
-  $files = &drupal_static(__FUNCTION__, array());
+  $files = &drupal_static(__FUNCTION__, []);
   if (isset($filepath)) {
     $files[] = $filepath;
   }
diff --git a/core/modules/file/tests/file_test/src/Form/FileTestForm.php b/core/modules/file/tests/file_test/src/Form/FileTestForm.php
index 628bb55dba0097b55b40f4d94ac8c5951455dce0..f43e20a8e900d13d2f5c04388e5d5357848cb2ab 100644
--- a/core/modules/file/tests/file_test/src/Form/FileTestForm.php
+++ b/core/modules/file/tests/file_test/src/Form/FileTestForm.php
@@ -21,48 +21,48 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['file_test_upload'] = array(
+    $form['file_test_upload'] = [
       '#type' => 'file',
       '#title' => t('Upload a file'),
-    );
-    $form['file_test_replace'] = array(
+    ];
+    $form['file_test_replace'] = [
       '#type' => 'select',
       '#title' => t('Replace existing image'),
-      '#options' => array(
+      '#options' => [
         FILE_EXISTS_RENAME => t('Appends number until name is unique'),
         FILE_EXISTS_REPLACE => t('Replace the existing file'),
         FILE_EXISTS_ERROR => t('Fail with an error'),
-      ),
+      ],
       '#default_value' => FILE_EXISTS_RENAME,
-    );
-    $form['file_subdir'] = array(
+    ];
+    $form['file_subdir'] = [
       '#type' => 'textfield',
       '#title' => t('Subdirectory for test file'),
       '#default_value' => '',
-    );
+    ];
 
-    $form['extensions'] = array(
+    $form['extensions'] = [
       '#type' => 'textfield',
       '#title' => t('Allowed extensions.'),
       '#default_value' => '',
-    );
+    ];
 
-    $form['allow_all_extensions'] = array(
+    $form['allow_all_extensions'] = [
       '#type' => 'checkbox',
       '#title' => t('Allow all extensions?'),
       '#default_value' => FALSE,
-    );
+    ];
 
-    $form['is_image_file'] = array(
+    $form['is_image_file'] = [
       '#type' => 'checkbox',
       '#title' => t('Is this an image file?'),
       '#default_value' => TRUE,
-    );
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
     return $form;
   }
 
@@ -86,16 +86,16 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     }
 
     // Setup validators.
-    $validators = array();
+    $validators = [];
     if ($form_state->getValue('is_image_file')) {
-      $validators['file_validate_is_image'] = array();
+      $validators['file_validate_is_image'] = [];
     }
 
     if ($form_state->getValue('allow_all_extensions')) {
-      $validators['file_validate_extensions'] = array();
+      $validators['file_validate_extensions'] = [];
     }
     elseif (!$form_state->isValueEmpty('extensions')) {
-      $validators['file_validate_extensions'] = array($form_state->getValue('extensions'));
+      $validators['file_validate_extensions'] = [$form_state->getValue('extensions')];
     }
 
     // The test for drupal_move_uploaded_file() triggering a warning is
@@ -108,9 +108,9 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $file = file_save_upload('file_test_upload', $validators, $destination, 0, $form_state->getValue('file_test_replace'));
     if ($file) {
       $form_state->setValue('file_test_upload', $file);
-      drupal_set_message(t('File @filepath was uploaded.', array('@filepath' => $file->getFileUri())));
-      drupal_set_message(t('File name is @filename.', array('@filename' => $file->getFilename())));
-      drupal_set_message(t('File MIME type is @mimetype.', array('@mimetype' => $file->getMimeType())));
+      drupal_set_message(t('File @filepath was uploaded.', ['@filepath' => $file->getFileUri()]));
+      drupal_set_message(t('File name is @filename.', ['@filename' => $file->getFilename()]));
+      drupal_set_message(t('File MIME type is @mimetype.', ['@mimetype' => $file->getMimeType()]));
       drupal_set_message(t('You WIN!'));
     }
     elseif ($file === FALSE) {
diff --git a/core/modules/file/tests/src/Functional/FileFieldTestBase.php b/core/modules/file/tests/src/Functional/FileFieldTestBase.php
index 9cc981bd46fabfc51365bbc295278b0ebdd76d6b..af3747bcc50c0c1ba81cc7b0de6265141fb5bd6e 100644
--- a/core/modules/file/tests/src/Functional/FileFieldTestBase.php
+++ b/core/modules/file/tests/src/Functional/FileFieldTestBase.php
@@ -18,7 +18,7 @@ abstract class FileFieldTestBase extends BrowserTestBase {
   *
   * @var array
   */
-  public static $modules = array('node', 'file', 'file_module_test', 'field_ui');
+  public static $modules = ['node', 'file', 'file_module_test', 'field_ui'];
 
   /**
    * An user with administration permissions.
@@ -29,9 +29,9 @@ abstract class FileFieldTestBase extends BrowserTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array('access content', 'access administration pages', 'administer site configuration', 'administer users', 'administer permissions', 'administer content types', 'administer node fields', 'administer node display', 'administer nodes', 'bypass node access'));
+    $this->adminUser = $this->drupalCreateUser(['access content', 'access administration pages', 'administer site configuration', 'administer users', 'administer permissions', 'administer content types', 'administer node fields', 'administer node display', 'administer nodes', 'bypass node access']);
     $this->drupalLogin($this->adminUser);
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
   }
 
   /**
@@ -73,14 +73,14 @@ function getLastFileId() {
    * @param array $widget_settings
    *   A list of widget settings that will be added to the widget defaults.
    */
-  function createFileField($name, $entity_type, $bundle, $storage_settings = array(), $field_settings = array(), $widget_settings = array()) {
-    $field_storage = FieldStorageConfig::create(array(
+  function createFileField($name, $entity_type, $bundle, $storage_settings = [], $field_settings = [], $widget_settings = []) {
+    $field_storage = FieldStorageConfig::create([
       'entity_type' => $entity_type,
       'field_name' => $name,
       'type' => 'file',
       'settings' => $storage_settings,
       'cardinality' => !empty($storage_settings['cardinality']) ? $storage_settings['cardinality'] : 1,
-    ));
+    ]);
     $field_storage->save();
 
     $this->attachFileField($name, $entity_type, $bundle, $field_settings, $widget_settings);
@@ -101,44 +101,44 @@ function createFileField($name, $entity_type, $bundle, $storage_settings = array
    * @param array $widget_settings
    *   A list of widget settings that will be added to the widget defaults.
    */
-  function attachFileField($name, $entity_type, $bundle, $field_settings = array(), $widget_settings = array()) {
-    $field = array(
+  function attachFileField($name, $entity_type, $bundle, $field_settings = [], $widget_settings = []) {
+    $field = [
       'field_name' => $name,
       'label' => $name,
       'entity_type' => $entity_type,
       'bundle' => $bundle,
       'required' => !empty($field_settings['required']),
       'settings' => $field_settings,
-    );
+    ];
     FieldConfig::create($field)->save();
 
     entity_get_form_display($entity_type, $bundle, 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'type' => 'file_generic',
         'settings' => $widget_settings,
-      ))
+      ])
       ->save();
     // Assign display settings.
     entity_get_display($entity_type, $bundle, 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'label' => 'hidden',
         'type' => 'file_default',
-      ))
+      ])
       ->save();
   }
 
   /**
    * Updates an existing file field with new settings.
    */
-  function updateFileField($name, $type_name, $field_settings = array(), $widget_settings = array()) {
+  function updateFileField($name, $type_name, $field_settings = [], $widget_settings = []) {
     $field = FieldConfig::loadByName('node', $type_name, $name);
     $field->setSettings(array_merge($field->getSettings(), $field_settings));
     $field->save();
 
     entity_get_form_display('node', $type_name, 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'settings' => $widget_settings,
-      ))
+      ])
       ->save();
   }
 
@@ -160,7 +160,7 @@ function updateFileField($name, $type_name, $field_settings = array(), $widget_s
    * @return int
    *   The node id.
    */
-  function uploadNodeFile(FileInterface $file, $field_name, $nid_or_type, $new_revision = TRUE, array $extras = array()) {
+  function uploadNodeFile(FileInterface $file, $field_name, $nid_or_type, $new_revision = TRUE, array $extras = []) {
     return $this->uploadNodeFiles([$file], $field_name, $nid_or_type, $new_revision, $extras);
   }
 
@@ -182,16 +182,16 @@ function uploadNodeFile(FileInterface $file, $field_name, $nid_or_type, $new_rev
    * @return int
    *   The node id.
    */
-  function uploadNodeFiles(array $files, $field_name, $nid_or_type, $new_revision = TRUE, array $extras = array()) {
-    $edit = array(
+  function uploadNodeFiles(array $files, $field_name, $nid_or_type, $new_revision = TRUE, array $extras = []) {
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
       'revision' => (string) (int) $new_revision,
-    );
+    ];
 
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     if (is_numeric($nid_or_type)) {
       $nid = $nid_or_type;
-      $node_storage->resetCache(array($nid));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
     }
     else {
@@ -202,7 +202,7 @@ function uploadNodeFiles(array $files, $field_name, $nid_or_type, $new_revision
       // Save at least one revision to better simulate a real site.
       $node->setNewRevision();
       $node->save();
-      $node_storage->resetCache(array($nid));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
       $this->assertNotEqual($nid, $node->getRevisionId(), 'Node revision exists.');
     }
@@ -235,11 +235,11 @@ function uploadNodeFiles(array $files, $field_name, $nid_or_type, $new_revision
    * Note that if replacing a file, it must first be removed then added again.
    */
   function removeNodeFile($nid, $new_revision = TRUE) {
-    $edit = array(
+    $edit = [
       'revision' => (string) (int) $new_revision,
-    );
+    ];
 
-    $this->drupalPostForm('node/' . $nid . '/edit', array(), t('Remove'));
+    $this->drupalPostForm('node/' . $nid . '/edit', [], t('Remove'));
     $this->drupalPostForm(NULL, $edit, t('Save and keep published'));
   }
 
@@ -247,12 +247,12 @@ function removeNodeFile($nid, $new_revision = TRUE) {
    * Replaces a file within a node.
    */
   function replaceNodeFile($file, $field_name, $nid, $new_revision = TRUE) {
-    $edit = array(
+    $edit = [
       'files[' . $field_name . '_0]' => drupal_realpath($file->getFileUri()),
       'revision' => (string) (int) $new_revision,
-    );
+    ];
 
-    $this->drupalPostForm('node/' . $nid . '/edit', array(), t('Remove'));
+    $this->drupalPostForm('node/' . $nid . '/edit', [], t('Remove'));
     $this->drupalPostForm(NULL, $edit, t('Save and keep published'));
   }
 
@@ -268,7 +268,7 @@ function replaceNodeFile($file, $field_name, $nid, $new_revision = TRUE) {
    *   (optional) A message to display with the assertion.
    */
   public static function assertFileExists($file, $message = NULL) {
-    $message = isset($message) ? $message : format_string('File %file exists on the disk.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file exists on the disk.', ['%file' => $file->getFileUri()]);
     $filename = $file instanceof FileInterface ? $file->getFileUri() : $file;
     parent::assertFileExists($filename, $message);
   }
@@ -279,7 +279,7 @@ public static function assertFileExists($file, $message = NULL) {
   function assertFileEntryExists($file, $message = NULL) {
     $this->container->get('entity.manager')->getStorage('file')->resetCache();
     $db_file = File::load($file->id());
-    $message = isset($message) ? $message : format_string('File %file exists in database at the correct path.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file exists in database at the correct path.', ['%file' => $file->getFileUri()]);
     $this->assertEqual($db_file->getFileUri(), $file->getFileUri(), $message);
   }
 
@@ -295,7 +295,7 @@ function assertFileEntryExists($file, $message = NULL) {
    *   (optional) A message to display with the assertion.
    */
   public static function assertFileNotExists($file, $message = NULL) {
-    $message = isset($message) ? $message : format_string('File %file exists on the disk.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file exists on the disk.', ['%file' => $file->getFileUri()]);
     $filename = $file instanceof FileInterface ? $file->getFileUri() : $file;
     parent::assertFileNotExists($filename, $message);
   }
@@ -305,7 +305,7 @@ public static function assertFileNotExists($file, $message = NULL) {
    */
   function assertFileEntryNotExists($file, $message) {
     $this->container->get('entity.manager')->getStorage('file')->resetCache();
-    $message = isset($message) ? $message : format_string('File %file exists in database at the correct path.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file exists in database at the correct path.', ['%file' => $file->getFileUri()]);
     $this->assertFalse(File::load($file->id()), $message);
   }
 
@@ -313,7 +313,7 @@ function assertFileEntryNotExists($file, $message) {
    * Asserts that a file's status is set to permanent in the database.
    */
   function assertFileIsPermanent(FileInterface $file, $message = NULL) {
-    $message = isset($message) ? $message : format_string('File %file is permanent.', array('%file' => $file->getFileUri()));
+    $message = isset($message) ? $message : format_string('File %file is permanent.', ['%file' => $file->getFileUri()]);
     $this->assertTrue($file->isPermanent(), $message);
   }
 
diff --git a/core/modules/file/tests/src/Functional/FileManagedAccessTest.php b/core/modules/file/tests/src/Functional/FileManagedAccessTest.php
index 97f77b6837c55b1af6a4f1236ce1c1b1f7e1cc55..fc6d85cb36cea72640d04dc0da7f514aae20bae5 100644
--- a/core/modules/file/tests/src/Functional/FileManagedAccessTest.php
+++ b/core/modules/file/tests/src/Functional/FileManagedAccessTest.php
@@ -16,20 +16,20 @@ class FileManagedAccessTest extends FileManagedTestBase {
    */
   function testFileAccess() {
     // Create a new file entity.
-    $file = File::create(array(
+    $file = File::create([
       'uid' => 1,
       'filename' => 'drupal.txt',
       'uri' => 'public://drupal.txt',
       'filemime' => 'text/plain',
       'status' => FILE_STATUS_PERMANENT,
-    ));
+    ]);
     file_put_contents($file->getFileUri(), 'hello world');
 
     // Save it, inserting a new record.
     $file->save();
 
     // Create authenticated user to check file access.
-    $account = $this->createUser(array('access site reports'));
+    $account = $this->createUser(['access site reports']);
 
     $this->assertTrue($file->access('view', $account), 'Public file is viewable to authenticated user');
     $this->assertTrue($file->access('download', $account), 'Public file is downloadable to authenticated user');
@@ -41,20 +41,20 @@ function testFileAccess() {
     $this->assertTrue($file->access('download', $account), 'Public file is downloadable to anonymous user');
 
     // Create a new file entity.
-    $file = File::create(array(
+    $file = File::create([
       'uid' => 1,
       'filename' => 'drupal.txt',
       'uri' => 'private://drupal.txt',
       'filemime' => 'text/plain',
       'status' => FILE_STATUS_PERMANENT,
-    ));
+    ]);
     file_put_contents($file->getFileUri(), 'hello world');
 
     // Save it, inserting a new record.
     $file->save();
 
     // Create authenticated user to check file access.
-    $account = $this->createUser(array('access site reports'));
+    $account = $this->createUser(['access site reports']);
 
     $this->assertFalse($file->access('view', $account), 'Private file is not viewable to authenticated user');
     $this->assertFalse($file->access('download', $account), 'Private file is not downloadable to authenticated user');
diff --git a/core/modules/file/tests/src/Functional/FileManagedTestBase.php b/core/modules/file/tests/src/Functional/FileManagedTestBase.php
index 6bd57dd39c64ea1b626590c0b9ec0dbe2ec09410..0adbe2c36b4a844b0c25b271395cd300fe1153aa 100644
--- a/core/modules/file/tests/src/Functional/FileManagedTestBase.php
+++ b/core/modules/file/tests/src/Functional/FileManagedTestBase.php
@@ -17,7 +17,7 @@ abstract class FileManagedTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('file_test', 'file');
+  public static $modules = ['file_test', 'file'];
 
   protected function setUp() {
     parent::setUp();
@@ -42,16 +42,16 @@ function assertFileHooksCalled($expected) {
     // Determine if there were any expected that were not called.
     $uncalled = array_diff($expected, $actual);
     if (count($uncalled)) {
-      $this->assertTrue(FALSE, format_string('Expected hooks %expected to be called but %uncalled was not called.', array('%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled))));
+      $this->assertTrue(FALSE, format_string('Expected hooks %expected to be called but %uncalled was not called.', ['%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled)]));
     }
     else {
-      $this->assertTrue(TRUE, format_string('All the expected hooks were called: %expected', array('%expected' => empty($expected) ? '(none)' : implode(', ', $expected))));
+      $this->assertTrue(TRUE, format_string('All the expected hooks were called: %expected', ['%expected' => empty($expected) ? '(none)' : implode(', ', $expected)]));
     }
 
     // Determine if there were any unexpected calls.
     $unexpected = array_diff($actual, $expected);
     if (count($unexpected)) {
-      $this->assertTrue(FALSE, format_string('Unexpected hooks were called: %unexpected.', array('%unexpected' => empty($unexpected) ? '(none)' : implode(', ', $unexpected))));
+      $this->assertTrue(FALSE, format_string('Unexpected hooks were called: %unexpected.', ['%unexpected' => empty($unexpected) ? '(none)' : implode(', ', $unexpected)]));
     }
     else {
       $this->assertTrue(TRUE, 'No unexpected hooks were called.');
@@ -73,13 +73,13 @@ function assertFileHookCalled($hook, $expected_count = 1, $message = NULL) {
 
     if (!isset($message)) {
       if ($actual_count == $expected_count) {
-        $message = format_string('hook_file_@name was called correctly.', array('@name' => $hook));
+        $message = format_string('hook_file_@name was called correctly.', ['@name' => $hook]);
       }
       elseif ($expected_count == 0) {
-        $message = \Drupal::translation()->formatPlural($actual_count, 'hook_file_@name was not expected to be called but was actually called once.', 'hook_file_@name was not expected to be called but was actually called @count times.', array('@name' => $hook, '@count' => $actual_count));
+        $message = \Drupal::translation()->formatPlural($actual_count, 'hook_file_@name was not expected to be called but was actually called once.', 'hook_file_@name was not expected to be called but was actually called @count times.', ['@name' => $hook, '@count' => $actual_count]);
       }
       else {
-        $message = format_string('hook_file_@name was expected to be called %expected times but was called %actual times.', array('@name' => $hook, '%expected' => $expected_count, '%actual' => $actual_count));
+        $message = format_string('hook_file_@name was expected to be called %expected times but was called %actual times.', ['@name' => $hook, '%expected' => $expected_count, '%actual' => $actual_count]);
       }
     }
     $this->assertEqual($actual_count, $expected_count, $message);
@@ -94,13 +94,13 @@ function assertFileHookCalled($hook, $expected_count = 1, $message = NULL) {
    *   File object to compare.
    */
   function assertFileUnchanged(FileInterface $before, FileInterface $after) {
-    $this->assertEqual($before->id(), $after->id(), t('File id is the same: %file1 == %file2.', array('%file1' => $before->id(), '%file2' => $after->id())), 'File unchanged');
-    $this->assertEqual($before->getOwner()->id(), $after->getOwner()->id(), t('File owner is the same: %file1 == %file2.', array('%file1' => $before->getOwner()->id(), '%file2' => $after->getOwner()->id())), 'File unchanged');
-    $this->assertEqual($before->getFilename(), $after->getFilename(), t('File name is the same: %file1 == %file2.', array('%file1' => $before->getFilename(), '%file2' => $after->getFilename())), 'File unchanged');
-    $this->assertEqual($before->getFileUri(), $after->getFileUri(), t('File path is the same: %file1 == %file2.', array('%file1' => $before->getFileUri(), '%file2' => $after->getFileUri())), 'File unchanged');
-    $this->assertEqual($before->getMimeType(), $after->getMimeType(), t('File MIME type is the same: %file1 == %file2.', array('%file1' => $before->getMimeType(), '%file2' => $after->getMimeType())), 'File unchanged');
-    $this->assertEqual($before->getSize(), $after->getSize(), t('File size is the same: %file1 == %file2.', array('%file1' => $before->getSize(), '%file2' => $after->getSize())), 'File unchanged');
-    $this->assertEqual($before->isPermanent(), $after->isPermanent(), t('File status is the same: %file1 == %file2.', array('%file1' => $before->isPermanent(), '%file2' => $after->isPermanent())), 'File unchanged');
+    $this->assertEqual($before->id(), $after->id(), t('File id is the same: %file1 == %file2.', ['%file1' => $before->id(), '%file2' => $after->id()]), 'File unchanged');
+    $this->assertEqual($before->getOwner()->id(), $after->getOwner()->id(), t('File owner is the same: %file1 == %file2.', ['%file1' => $before->getOwner()->id(), '%file2' => $after->getOwner()->id()]), 'File unchanged');
+    $this->assertEqual($before->getFilename(), $after->getFilename(), t('File name is the same: %file1 == %file2.', ['%file1' => $before->getFilename(), '%file2' => $after->getFilename()]), 'File unchanged');
+    $this->assertEqual($before->getFileUri(), $after->getFileUri(), t('File path is the same: %file1 == %file2.', ['%file1' => $before->getFileUri(), '%file2' => $after->getFileUri()]), 'File unchanged');
+    $this->assertEqual($before->getMimeType(), $after->getMimeType(), t('File MIME type is the same: %file1 == %file2.', ['%file1' => $before->getMimeType(), '%file2' => $after->getMimeType()]), 'File unchanged');
+    $this->assertEqual($before->getSize(), $after->getSize(), t('File size is the same: %file1 == %file2.', ['%file1' => $before->getSize(), '%file2' => $after->getSize()]), 'File unchanged');
+    $this->assertEqual($before->isPermanent(), $after->isPermanent(), t('File status is the same: %file1 == %file2.', ['%file1' => $before->isPermanent(), '%file2' => $after->isPermanent()]), 'File unchanged');
   }
 
   /**
@@ -112,8 +112,8 @@ function assertFileUnchanged(FileInterface $before, FileInterface $after) {
    *   File object to compare.
    */
   function assertDifferentFile(FileInterface $file1, FileInterface $file2) {
-    $this->assertNotEqual($file1->id(), $file2->id(), t('Files have different ids: %file1 != %file2.', array('%file1' => $file1->id(), '%file2' => $file2->id())), 'Different file');
-    $this->assertNotEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have different paths: %file1 != %file2.', array('%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri())), 'Different file');
+    $this->assertNotEqual($file1->id(), $file2->id(), t('Files have different ids: %file1 != %file2.', ['%file1' => $file1->id(), '%file2' => $file2->id()]), 'Different file');
+    $this->assertNotEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have different paths: %file1 != %file2.', ['%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri()]), 'Different file');
   }
 
   /**
@@ -125,8 +125,8 @@ function assertDifferentFile(FileInterface $file1, FileInterface $file2) {
    *   File object to compare.
    */
   function assertSameFile(FileInterface $file1, FileInterface $file2) {
-    $this->assertEqual($file1->id(), $file2->id(), t('Files have the same ids: %file1 == %file2.', array('%file1' => $file1->id(), '%file2-fid' => $file2->id())), 'Same file');
-    $this->assertEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have the same path: %file1 == %file2.', array('%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri())), 'Same file');
+    $this->assertEqual($file1->id(), $file2->id(), t('Files have the same ids: %file1 == %file2.', ['%file1' => $file1->id(), '%file2-fid' => $file2->id()]), 'Same file');
+    $this->assertEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have the same path: %file1 == %file2.', ['%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri()]), 'Same file');
   }
 
   /**
diff --git a/core/modules/file/tests/src/Kernel/AccessTest.php b/core/modules/file/tests/src/Kernel/AccessTest.php
index c2fa65bacb0c86d8ace7fdf14d8667cfc70eeea4..c71d7e80e7539b9e8075aee7e006c7c7b7ab4efc 100644
--- a/core/modules/file/tests/src/Kernel/AccessTest.php
+++ b/core/modules/file/tests/src/Kernel/AccessTest.php
@@ -49,7 +49,7 @@ protected function setUp() {
 
     $this->installEntitySchema('file');
     $this->installEntitySchema('user');
-    $this->installSchema('file', array('file_usage'));
+    $this->installSchema('file', ['file_usage']);
     $this->installSchema('system', 'sequences');
 
     $this->user1 = User::create([
@@ -64,11 +64,11 @@ protected function setUp() {
     ]);
     $this->user2->save();
 
-    $this->file = File::create(array(
+    $this->file = File::create([
       'uid' => $this->user1->id(),
       'filename' => 'druplicon.txt',
       'filemime' => 'text/plain',
-    ));
+    ]);
   }
 
   /**
diff --git a/core/modules/file/tests/src/Kernel/CopyTest.php b/core/modules/file/tests/src/Kernel/CopyTest.php
index 8836bd48420256bd2b73b334ae4f680a68b5618c..4c8d41fbec4b6ea161eb4a4d7df2b99eef86b682 100644
--- a/core/modules/file/tests/src/Kernel/CopyTest.php
+++ b/core/modules/file/tests/src/Kernel/CopyTest.php
@@ -27,7 +27,7 @@ function testNormal() {
     $this->assertEqual($contents, file_get_contents($result->getFileUri()), 'Contents of file were copied correctly.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('copy', 'insert'));
+    $this->assertFileHooksCalled(['copy', 'insert']);
 
     $this->assertDifferentFile($source, $result);
     $this->assertEqual($result->getFileUri(), $desired_uri, 'The copied file entity has the desired filepath.');
@@ -59,7 +59,7 @@ function testExistingRename() {
     $this->assertNotEqual($result->getFileUri(), $source->getFileUri(), 'Returned file path has changed from the original.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('copy', 'insert'));
+    $this->assertFileHooksCalled(['copy', 'insert']);
 
     // Load all the affected files to check the changes that actually made it
     // to the database.
@@ -99,7 +99,7 @@ function testExistingReplace() {
     $this->assertDifferentFile($source, $result);
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('load', 'copy', 'update'));
+    $this->assertFileHooksCalled(['load', 'copy', 'update']);
 
     // Load all the affected files to check the changes that actually made it
     // to the database.
@@ -136,7 +136,7 @@ function testExistingError() {
     $this->assertEqual($contents, file_get_contents($target->getFileUri()), 'Contents of file were not altered.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array());
+    $this->assertFileHooksCalled([]);
 
     $this->assertFileUnchanged($source, File::load($source->id()));
     $this->assertFileUnchanged($target, File::load($target->id()));
diff --git a/core/modules/file/tests/src/Kernel/DeleteTest.php b/core/modules/file/tests/src/Kernel/DeleteTest.php
index b88057121d2444e85b0cbfcddc280dee5e5d3f25..6d992a5423d5e8645b0c83a058da10c625d98a7c 100644
--- a/core/modules/file/tests/src/Kernel/DeleteTest.php
+++ b/core/modules/file/tests/src/Kernel/DeleteTest.php
@@ -19,7 +19,7 @@ function testUnused() {
     // Check that deletion removes the file and database record.
     $this->assertTrue(is_file($file->getFileUri()), 'File exists.');
     $file->delete();
-    $this->assertFileHooksCalled(array('delete'));
+    $this->assertFileHooksCalled(['delete']);
     $this->assertFalse(file_exists($file->getFileUri()), 'Test file has actually been deleted.');
     $this->assertFalse(File::load($file->id()), 'File was removed from the database.');
   }
@@ -35,7 +35,7 @@ function testInUse() {
 
     $file_usage->delete($file, 'testing', 'test', 1);
     $usage = $file_usage->listUsage($file);
-    $this->assertEqual($usage['testing']['test'], array(1 => 1), 'Test file is still in use.');
+    $this->assertEqual($usage['testing']['test'], [1 => 1], 'Test file is still in use.');
     $this->assertTrue(file_exists($file->getFileUri()), 'File still exists on the disk.');
     $this->assertTrue(File::load($file->id()), 'File still exists in the database.');
 
@@ -44,7 +44,7 @@ function testInUse() {
 
     $file_usage->delete($file, 'testing', 'test', 1);
     $usage = $file_usage->listUsage($file);
-    $this->assertFileHooksCalled(array('load', 'update'));
+    $this->assertFileHooksCalled(['load', 'update']);
     $this->assertTrue(empty($usage), 'File usage data was removed.');
     $this->assertTrue(file_exists($file->getFileUri()), 'File still exists on the disk.');
     $file = File::load($file->id());
@@ -56,15 +56,15 @@ function testInUse() {
     // of the file is older than the system.file.temporary_maximum_age
     // configuration value.
     db_update('file_managed')
-      ->fields(array(
+      ->fields([
         'changed' => REQUEST_TIME - ($this->config('system.file')->get('temporary_maximum_age') + 1),
-      ))
+      ])
       ->condition('fid', $file->id())
       ->execute();
     \Drupal::service('cron')->run();
 
     // file_cron() loads
-    $this->assertFileHooksCalled(array('delete'));
+    $this->assertFileHooksCalled(['delete']);
     $this->assertFalse(file_exists($file->getFileUri()), 'File has been deleted after its last usage was removed.');
     $this->assertFalse(File::load($file->id()), 'File was removed from the database.');
   }
diff --git a/core/modules/file/tests/src/Kernel/FileItemTest.php b/core/modules/file/tests/src/Kernel/FileItemTest.php
index 747d5da703e8e511aec694acfe6280f2c4e8379d..8219af15d9c45ad4985a72e63e4993daa8191ea1 100644
--- a/core/modules/file/tests/src/Kernel/FileItemTest.php
+++ b/core/modules/file/tests/src/Kernel/FileItemTest.php
@@ -23,7 +23,7 @@ class FileItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('file');
+  public static $modules = ['file'];
 
   /**
    * Created file entity.
@@ -43,20 +43,20 @@ protected function setUp() {
     parent::setUp();
 
     $this->installEntitySchema('file');
-    $this->installSchema('file', array('file_usage'));
+    $this->installSchema('file', ['file_usage']);
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'file_test',
       'entity_type' => 'entity_test',
       'type' => 'file',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
     $this->directory = $this->getRandomGenerator()->name(8);
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'file_test',
       'bundle' => 'entity_test',
-      'settings' => array('file_directory' => $this->directory),
+      'settings' => ['file_directory' => $this->directory],
     ])->save();
     file_put_contents('public://example.txt', $this->randomMachineName());
     $this->file = File::create([
@@ -131,7 +131,7 @@ public function testFileItem() {
       'weight' => 1,
     ])->save();
     $entity = EntityTest::create();
-    $entity->file_test = array('entity' => $file3);
+    $entity->file_test = ['entity' => $file3];
     $uri = $file3->getFileUri();
     $output = entity_view($entity, 'default');
     \Drupal::service('renderer')->renderRoot($output);
diff --git a/core/modules/file/tests/src/Kernel/FileManagedUnitTestBase.php b/core/modules/file/tests/src/Kernel/FileManagedUnitTestBase.php
index 4db377ded9b86ada4ecbfe4609f8d80ce820557f..3035b7cb218c7f83746e1e2f14bafc61f3fdacb7 100644
--- a/core/modules/file/tests/src/Kernel/FileManagedUnitTestBase.php
+++ b/core/modules/file/tests/src/Kernel/FileManagedUnitTestBase.php
@@ -18,17 +18,17 @@ abstract class FileManagedUnitTestBase extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('file_test', 'file', 'system', 'field', 'user');
+  public static $modules = ['file_test', 'file', 'system', 'field', 'user'];
 
   protected function setUp() {
     parent::setUp();
     // Clear out any hook calls.
     file_test_reset();
 
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
     $this->installEntitySchema('file');
     $this->installEntitySchema('user');
-    $this->installSchema('file', array('file_usage'));
+    $this->installSchema('file', ['file_usage']);
 
     // Make sure that a user with uid 1 exists, self::createFile() relies on
     // it.
@@ -55,16 +55,16 @@ function assertFileHooksCalled($expected) {
     // Determine if there were any expected that were not called.
     $uncalled = array_diff($expected, $actual);
     if (count($uncalled)) {
-      $this->assertTrue(FALSE, format_string('Expected hooks %expected to be called but %uncalled was not called.', array('%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled))));
+      $this->assertTrue(FALSE, format_string('Expected hooks %expected to be called but %uncalled was not called.', ['%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled)]));
     }
     else {
-      $this->assertTrue(TRUE, format_string('All the expected hooks were called: %expected', array('%expected' => empty($expected) ? '(none)' : implode(', ', $expected))));
+      $this->assertTrue(TRUE, format_string('All the expected hooks were called: %expected', ['%expected' => empty($expected) ? '(none)' : implode(', ', $expected)]));
     }
 
     // Determine if there were any unexpected calls.
     $unexpected = array_diff($actual, $expected);
     if (count($unexpected)) {
-      $this->assertTrue(FALSE, format_string('Unexpected hooks were called: %unexpected.', array('%unexpected' => empty($unexpected) ? '(none)' : implode(', ', $unexpected))));
+      $this->assertTrue(FALSE, format_string('Unexpected hooks were called: %unexpected.', ['%unexpected' => empty($unexpected) ? '(none)' : implode(', ', $unexpected)]));
     }
     else {
       $this->assertTrue(TRUE, 'No unexpected hooks were called.');
@@ -86,13 +86,13 @@ function assertFileHookCalled($hook, $expected_count = 1, $message = NULL) {
 
     if (!isset($message)) {
       if ($actual_count == $expected_count) {
-        $message = format_string('hook_file_@name was called correctly.', array('@name' => $hook));
+        $message = format_string('hook_file_@name was called correctly.', ['@name' => $hook]);
       }
       elseif ($expected_count == 0) {
-        $message = \Drupal::translation()->formatPlural($actual_count, 'hook_file_@name was not expected to be called but was actually called once.', 'hook_file_@name was not expected to be called but was actually called @count times.', array('@name' => $hook, '@count' => $actual_count));
+        $message = \Drupal::translation()->formatPlural($actual_count, 'hook_file_@name was not expected to be called but was actually called once.', 'hook_file_@name was not expected to be called but was actually called @count times.', ['@name' => $hook, '@count' => $actual_count]);
       }
       else {
-        $message = format_string('hook_file_@name was expected to be called %expected times but was called %actual times.', array('@name' => $hook, '%expected' => $expected_count, '%actual' => $actual_count));
+        $message = format_string('hook_file_@name was expected to be called %expected times but was called %actual times.', ['@name' => $hook, '%expected' => $expected_count, '%actual' => $actual_count]);
       }
     }
     $this->assertEqual($actual_count, $expected_count, $message);
@@ -107,13 +107,13 @@ function assertFileHookCalled($hook, $expected_count = 1, $message = NULL) {
    *   File object to compare.
    */
   function assertFileUnchanged(FileInterface $before, FileInterface $after) {
-    $this->assertEqual($before->id(), $after->id(), t('File id is the same: %file1 == %file2.', array('%file1' => $before->id(), '%file2' => $after->id())), 'File unchanged');
-    $this->assertEqual($before->getOwner()->id(), $after->getOwner()->id(), t('File owner is the same: %file1 == %file2.', array('%file1' => $before->getOwner()->id(), '%file2' => $after->getOwner()->id())), 'File unchanged');
-    $this->assertEqual($before->getFilename(), $after->getFilename(), t('File name is the same: %file1 == %file2.', array('%file1' => $before->getFilename(), '%file2' => $after->getFilename())), 'File unchanged');
-    $this->assertEqual($before->getFileUri(), $after->getFileUri(), t('File path is the same: %file1 == %file2.', array('%file1' => $before->getFileUri(), '%file2' => $after->getFileUri())), 'File unchanged');
-    $this->assertEqual($before->getMimeType(), $after->getMimeType(), t('File MIME type is the same: %file1 == %file2.', array('%file1' => $before->getMimeType(), '%file2' => $after->getMimeType())), 'File unchanged');
-    $this->assertEqual($before->getSize(), $after->getSize(), t('File size is the same: %file1 == %file2.', array('%file1' => $before->getSize(), '%file2' => $after->getSize())), 'File unchanged');
-    $this->assertEqual($before->isPermanent(), $after->isPermanent(), t('File status is the same: %file1 == %file2.', array('%file1' => $before->isPermanent(), '%file2' => $after->isPermanent())), 'File unchanged');
+    $this->assertEqual($before->id(), $after->id(), t('File id is the same: %file1 == %file2.', ['%file1' => $before->id(), '%file2' => $after->id()]), 'File unchanged');
+    $this->assertEqual($before->getOwner()->id(), $after->getOwner()->id(), t('File owner is the same: %file1 == %file2.', ['%file1' => $before->getOwner()->id(), '%file2' => $after->getOwner()->id()]), 'File unchanged');
+    $this->assertEqual($before->getFilename(), $after->getFilename(), t('File name is the same: %file1 == %file2.', ['%file1' => $before->getFilename(), '%file2' => $after->getFilename()]), 'File unchanged');
+    $this->assertEqual($before->getFileUri(), $after->getFileUri(), t('File path is the same: %file1 == %file2.', ['%file1' => $before->getFileUri(), '%file2' => $after->getFileUri()]), 'File unchanged');
+    $this->assertEqual($before->getMimeType(), $after->getMimeType(), t('File MIME type is the same: %file1 == %file2.', ['%file1' => $before->getMimeType(), '%file2' => $after->getMimeType()]), 'File unchanged');
+    $this->assertEqual($before->getSize(), $after->getSize(), t('File size is the same: %file1 == %file2.', ['%file1' => $before->getSize(), '%file2' => $after->getSize()]), 'File unchanged');
+    $this->assertEqual($before->isPermanent(), $after->isPermanent(), t('File status is the same: %file1 == %file2.', ['%file1' => $before->isPermanent(), '%file2' => $after->isPermanent()]), 'File unchanged');
   }
 
   /**
@@ -125,8 +125,8 @@ function assertFileUnchanged(FileInterface $before, FileInterface $after) {
    *   File object to compare.
    */
   function assertDifferentFile(FileInterface $file1, FileInterface $file2) {
-    $this->assertNotEqual($file1->id(), $file2->id(), t('Files have different ids: %file1 != %file2.', array('%file1' => $file1->id(), '%file2' => $file2->id())), 'Different file');
-    $this->assertNotEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have different paths: %file1 != %file2.', array('%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri())), 'Different file');
+    $this->assertNotEqual($file1->id(), $file2->id(), t('Files have different ids: %file1 != %file2.', ['%file1' => $file1->id(), '%file2' => $file2->id()]), 'Different file');
+    $this->assertNotEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have different paths: %file1 != %file2.', ['%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri()]), 'Different file');
   }
 
   /**
@@ -138,8 +138,8 @@ function assertDifferentFile(FileInterface $file1, FileInterface $file2) {
    *   File object to compare.
    */
   function assertSameFile(FileInterface $file1, FileInterface $file2) {
-    $this->assertEqual($file1->id(), $file2->id(), t('Files have the same ids: %file1 == %file2.', array('%file1' => $file1->id(), '%file2-fid' => $file2->id())), 'Same file');
-    $this->assertEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have the same path: %file1 == %file2.', array('%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri())), 'Same file');
+    $this->assertEqual($file1->id(), $file2->id(), t('Files have the same ids: %file1 == %file2.', ['%file1' => $file1->id(), '%file2-fid' => $file2->id()]), 'Same file');
+    $this->assertEqual($file1->getFileUri(), $file2->getFileUri(), t('Files have the same path: %file1 == %file2.', ['%file1' => $file1->getFileUri(), '%file2' => $file2->getFileUri()]), 'Same file');
   }
 
   /**
diff --git a/core/modules/file/tests/src/Kernel/LoadTest.php b/core/modules/file/tests/src/Kernel/LoadTest.php
index c523d43bfda1df7a97ae6dee0ecc7f23cba16e55..8cbaccc2c90f41f56535eabe84c950a767d839c5 100644
--- a/core/modules/file/tests/src/Kernel/LoadTest.php
+++ b/core/modules/file/tests/src/Kernel/LoadTest.php
@@ -15,25 +15,25 @@ class LoadTest extends FileManagedUnitTestBase {
    */
   function testLoadMissingFid() {
     $this->assertFalse(File::load(-1), 'Try to load an invalid fid fails.');
-    $this->assertFileHooksCalled(array());
+    $this->assertFileHooksCalled([]);
   }
 
   /**
    * Try to load a non-existent file by URI.
    */
   function testLoadMissingFilepath() {
-    $files = entity_load_multiple_by_properties('file', array('uri' => 'foobar://misc/druplicon.png'));
+    $files = entity_load_multiple_by_properties('file', ['uri' => 'foobar://misc/druplicon.png']);
     $this->assertFalse(reset($files), "Try to load a file that doesn't exist in the database fails.");
-    $this->assertFileHooksCalled(array());
+    $this->assertFileHooksCalled([]);
   }
 
   /**
    * Try to load a non-existent file by status.
    */
   function testLoadInvalidStatus() {
-    $files = entity_load_multiple_by_properties('file', array('status' => -99));
+    $files = entity_load_multiple_by_properties('file', ['status' => -99]);
     $this->assertFalse(reset($files), 'Trying to load a file with an invalid status fails.');
-    $this->assertFileHooksCalled(array());
+    $this->assertFileHooksCalled([]);
   }
 
   /**
@@ -62,7 +62,7 @@ function testMultiple() {
 
     // Load by path.
     file_test_reset();
-    $by_path_files = entity_load_multiple_by_properties('file', array('uri' => $file->getFileUri()));
+    $by_path_files = entity_load_multiple_by_properties('file', ['uri' => $file->getFileUri()]);
     $this->assertFileHookCalled('load');
     $this->assertEqual(1, count($by_path_files), 'entity_load_multiple_by_properties() returned an array of the correct size.');
     $by_path_file = reset($by_path_files);
@@ -71,8 +71,8 @@ function testMultiple() {
 
     // Load by fid.
     file_test_reset();
-    $by_fid_files = File::loadMultiple(array($file->id()));
-    $this->assertFileHooksCalled(array());
+    $by_fid_files = File::loadMultiple([$file->id()]);
+    $this->assertFileHooksCalled([]);
     $this->assertEqual(1, count($by_fid_files), '\Drupal\file\Entity\File::loadMultiple() returned an array of the correct size.');
     $by_fid_file = reset($by_fid_files);
     $this->assertTrue($by_fid_file->file_test['loaded'], 'file_test_file_load() was able to modify the file during load.');
diff --git a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateFileTest.php b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateFileTest.php
index 7e1cff91b5b74e4301b821a2dea9523707dcc19c..024db2136e373095942b9bf0304ad2807ba71eda 100644
--- a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateFileTest.php
+++ b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateFileTest.php
@@ -79,12 +79,12 @@ public function testFiles() {
     // Update the file_directory_path.
     Database::getConnection('default', 'migrate')
       ->update('variable')
-      ->fields(array('value' => serialize('files/test')))
+      ->fields(['value' => serialize('files/test')])
       ->condition('name', 'file_directory_path')
       ->execute();
     Database::getConnection('default', 'migrate')
       ->update('variable')
-      ->fields(array('value' => serialize(file_directory_temp())))
+      ->fields(['value' => serialize(file_directory_temp())])
       ->condition('name', 'file_directory_temp')
       ->execute();
 
@@ -122,10 +122,10 @@ public static function migrateDumpAlter(KernelTestBase $test) {
 
     $db->update('files')
       ->condition('fid', 6)
-      ->fields(array(
+      ->fields([
         'filename' => static::$tempFilename,
         'filepath' => $file_path,
-      ))
+      ])
       ->execute();
 
     $file = (array) $db->select('files')
diff --git a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadEntityDisplayTest.php b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadEntityDisplayTest.php
index a813b93cc7655ac66a8092c3d830e074af918c4c..c3b71ad42636f6c5ae5fade6f89ae1718c5dd268 100644
--- a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadEntityDisplayTest.php
+++ b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadEntityDisplayTest.php
@@ -38,7 +38,7 @@ public function testUploadEntityDisplay() {
     $component = $display->getComponent('upload');
     $this->assertTrue(is_null($component));
 
-    $this->assertIdentical(array('node', 'page', 'default', 'upload'), $this->getMigration('d6_upload_entity_display')->getIdMap()->lookupDestinationID(array('page')));
+    $this->assertIdentical(['node', 'page', 'default', 'upload'], $this->getMigration('d6_upload_entity_display')->getIdMap()->lookupDestinationID(['page']));
   }
 
 }
diff --git a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadEntityFormDisplayTest.php b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadEntityFormDisplayTest.php
index de0acbfd400f2c23aee832205c46bfaf773bb339..e9782aa90496954161e0e56e4b143b8ccc362ddd 100644
--- a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadEntityFormDisplayTest.php
+++ b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadEntityFormDisplayTest.php
@@ -38,7 +38,7 @@ public function testUploadEntityFormDisplay() {
     $component = $display->getComponent('upload');
     $this->assertTrue(is_null($component));
 
-    $this->assertIdentical(array('node', 'page', 'default', 'upload'), $this->getMigration('d6_upload_entity_form_display')->getIdMap()->lookupDestinationID(array('page')));
+    $this->assertIdentical(['node', 'page', 'default', 'upload'], $this->getMigration('d6_upload_entity_form_display')->getIdMap()->lookupDestinationID(['page']));
   }
 
 }
diff --git a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadFieldTest.php b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadFieldTest.php
index 9d5c711d58be7aaa5d0d156aa8285631f30d101f..918d6f3c55eba1783455a9918d653073ecd79615 100644
--- a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadFieldTest.php
+++ b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadFieldTest.php
@@ -26,7 +26,7 @@ protected function setUp() {
   public function testUpload() {
     $field_storage = FieldStorageConfig::load('node.upload');
     $this->assertIdentical('node.upload', $field_storage->id());
-    $this->assertIdentical(array('node', 'upload'), $this->getMigration('d6_upload_field')->getIdMap()->lookupDestinationID(array('')));
+    $this->assertIdentical(['node', 'upload'], $this->getMigration('d6_upload_field')->getIdMap()->lookupDestinationID(['']));
   }
 
 }
diff --git a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadInstanceTest.php b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadInstanceTest.php
index a835006afdf7390de2f0d6c360130caa5acac7e7..18c4a71bcf4f2e08e900ab9d312475a653f567c1 100644
--- a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadInstanceTest.php
+++ b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadInstanceTest.php
@@ -38,7 +38,7 @@ public function testUploadFieldInstance() {
     $field = FieldConfig::load('node.article.upload');
     $this->assertTrue(is_null($field));
 
-    $this->assertIdentical(array('node', 'page', 'upload'), $this->getMigration('d6_upload_field_instance')->getIdMap()->lookupDestinationID(array('page')));
+    $this->assertIdentical(['node', 'page', 'upload'], $this->getMigration('d6_upload_field_instance')->getIdMap()->lookupDestinationID(['page']));
   }
 
 }
diff --git a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadTest.php b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadTest.php
index 463ce022d80e2157bcf59d4823e4bbf7472628db..2ab104dae34ee40bf5459617055b73ab6945afcf 100644
--- a/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadTest.php
+++ b/core/modules/file/tests/src/Kernel/Migrate/d6/MigrateUploadTest.php
@@ -24,10 +24,10 @@ protected function setUp() {
     $this->installSchema('file', ['file_usage']);
     $this->installSchema('node', ['node_access']);
 
-    $id_mappings = array('d6_file' => array());
+    $id_mappings = ['d6_file' => []];
     // Create new file entities.
     for ($i = 1; $i <= 3; $i++) {
-      $file = File::create(array(
+      $file = File::create([
         'fid' => $i,
         'uid' => 1,
         'filename' => 'druplicon.txt',
@@ -36,13 +36,13 @@ protected function setUp() {
         'created' => 1,
         'changed' => 1,
         'status' => FILE_STATUS_PERMANENT,
-      ));
+      ]);
       $file->enforceIsNew();
       file_put_contents($file->getFileUri(), 'hello world');
 
       // Save it, inserting a new record.
       $file->save();
-      $id_mappings['d6_file'][] = array(array($i), array($i));
+      $id_mappings['d6_file'][] = [[$i], [$i]];
     }
     $this->prepareMigrations($id_mappings);
 
diff --git a/core/modules/file/tests/src/Kernel/MoveTest.php b/core/modules/file/tests/src/Kernel/MoveTest.php
index a56caeaeceaa27b54c7430be91a565f4e418044d..f2f1034282720f0b7dee628da4c45b763642b362 100644
--- a/core/modules/file/tests/src/Kernel/MoveTest.php
+++ b/core/modules/file/tests/src/Kernel/MoveTest.php
@@ -28,10 +28,10 @@ function testNormal() {
     $this->assertEqual($contents, file_get_contents($result->getFileUri()), 'Contents of file correctly written.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('move', 'load', 'update'));
+    $this->assertFileHooksCalled(['move', 'load', 'update']);
 
     // Make sure we got the same file back.
-    $this->assertEqual($source->id(), $result->id(), format_string("Source file id's' %fid is unchanged after move.", array('%fid' => $source->id())));
+    $this->assertEqual($source->id(), $result->id(), format_string("Source file id's' %fid is unchanged after move.", ['%fid' => $source->id()]));
 
     // Reload the file from the database and check that the changes were
     // actually saved.
@@ -60,7 +60,7 @@ function testExistingRename() {
     $this->assertEqual($contents, file_get_contents($result->getFileUri()), 'Contents of file correctly written.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('move', 'load', 'update'));
+    $this->assertFileHooksCalled(['move', 'load', 'update']);
 
     // Compare the returned value to what made it into the database.
     $this->assertFileUnchanged($result, File::load($result->id()));
@@ -95,7 +95,7 @@ function testExistingReplace() {
     $this->assertTrue($result, 'File moved successfully.');
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('move', 'update', 'delete', 'load'));
+    $this->assertFileHooksCalled(['move', 'update', 'delete', 'load']);
 
     // Reload the file from the database and check that the changes were
     // actually saved.
@@ -122,7 +122,7 @@ function testExistingReplaceSelf() {
     $this->assertEqual($contents, file_get_contents($source->getFileUri()), 'Contents of file were not altered.');
 
     // Check that no hooks were called while failing.
-    $this->assertFileHooksCalled(array());
+    $this->assertFileHooksCalled([]);
 
     // Load the file from the database and make sure it is identical to what
     // was returned.
@@ -149,7 +149,7 @@ function testExistingError() {
     $this->assertEqual($contents, file_get_contents($target->getFileUri()), 'Contents of file were not altered.');
 
     // Check that no hooks were called while failing.
-    $this->assertFileHooksCalled(array());
+    $this->assertFileHooksCalled([]);
 
     // Load the file from the database and make sure it is identical to what
     // was returned.
diff --git a/core/modules/file/tests/src/Kernel/SaveDataTest.php b/core/modules/file/tests/src/Kernel/SaveDataTest.php
index c5637d08d377b54c042dfec84dad163a238d609c..f92ef9a5cb72cd1713843104c4a9a55cd7feae91 100644
--- a/core/modules/file/tests/src/Kernel/SaveDataTest.php
+++ b/core/modules/file/tests/src/Kernel/SaveDataTest.php
@@ -26,7 +26,7 @@ function testWithoutFilename() {
     $this->assertTrue($result->isPermanent(), "The file's status was set to permanent.");
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('insert'));
+    $this->assertFileHooksCalled(['insert']);
 
     // Verify that what was returned is what's in the database.
     $this->assertFileUnchanged($result, File::load($result->id()));
@@ -51,7 +51,7 @@ function testWithFilename() {
     $this->assertTrue($result->isPermanent(), "The file's status was set to permanent.");
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('insert'));
+    $this->assertFileHooksCalled(['insert']);
 
     // Verify that what was returned is what's in the database.
     $this->assertFileUnchanged($result, File::load($result->id()));
@@ -75,7 +75,7 @@ function testExistingRename() {
     $this->assertTrue($result->isPermanent(), "The file's status was set to permanent.");
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('insert'));
+    $this->assertFileHooksCalled(['insert']);
 
     // Ensure that the existing file wasn't overwritten.
     $this->assertDifferentFile($existing, $result);
@@ -103,7 +103,7 @@ function testExistingReplace() {
     $this->assertTrue($result->isPermanent(), "The file's status was set to permanent.");
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('load', 'update'));
+    $this->assertFileHooksCalled(['load', 'update']);
 
     // Verify that the existing file was re-used.
     $this->assertSameFile($existing, $result);
@@ -125,7 +125,7 @@ function testExistingError() {
     $this->assertEqual($contents, file_get_contents($existing->getFileUri()), 'Contents of existing file were unchanged.');
 
     // Check that no hooks were called while failing.
-    $this->assertFileHooksCalled(array());
+    $this->assertFileHooksCalled([]);
 
     // Ensure that the existing file wasn't overwritten.
     $this->assertFileUnchanged($existing, File::load($existing->id()));
diff --git a/core/modules/file/tests/src/Kernel/SaveTest.php b/core/modules/file/tests/src/Kernel/SaveTest.php
index 69c7f2b7afd78137f6fe8b4c09c9bb007f2dde76..8d91d81aa99e412e9e4624050f6b99bc319e1c7f 100644
--- a/core/modules/file/tests/src/Kernel/SaveTest.php
+++ b/core/modules/file/tests/src/Kernel/SaveTest.php
@@ -12,20 +12,20 @@
 class SaveTest extends FileManagedUnitTestBase {
   function testFileSave() {
     // Create a new file entity.
-    $file = File::create(array(
+    $file = File::create([
       'uid' => 1,
       'filename' => 'druplicon.txt',
       'uri' => 'public://druplicon.txt',
       'filemime' => 'text/plain',
       'status' => FILE_STATUS_PERMANENT,
-    ));
+    ]);
     file_put_contents($file->getFileUri(), 'hello world');
 
     // Save it, inserting a new record.
     $file->save();
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('insert'));
+    $this->assertFileHooksCalled(['insert']);
 
     $this->assertTrue($file->id() > 0, 'A new file ID is set when saving a new file to the database.', 'File');
     $loaded_file = File::load($file->id());
@@ -41,7 +41,7 @@ function testFileSave() {
     $file->save();
 
     // Check that the correct hooks were called.
-    $this->assertFileHooksCalled(array('load', 'update'));
+    $this->assertFileHooksCalled(['load', 'update']);
 
     $this->assertEqual($file->id(), $file->id(), 'The file ID of an existing file is not changed when updating the database.', 'File');
     $this->assertTrue($file->getChangedTime() >= $file->getChangedTime(), "Timestamp didn't go backwards.", 'File');
@@ -52,13 +52,13 @@ function testFileSave() {
 
     // Try to insert a second file with the same name apart from case insensitivity
     // to ensure the 'uri' index allows for filenames with different cases.
-    $uppercase_values = array(
+    $uppercase_values = [
       'uid' => 1,
       'filename' => 'DRUPLICON.txt',
       'uri' => 'public://DRUPLICON.txt',
       'filemime' => 'text/plain',
       'status' => FILE_STATUS_PERMANENT,
-    );
+    ];
     $uppercase_file = File::create($uppercase_values);
     file_put_contents($uppercase_file->getFileUri(), 'hello world');
     $violations = $uppercase_file->validate();
@@ -79,7 +79,7 @@ function testFileSave() {
       ->execute();
 
     $this->assertEqual(1, count($fids));
-    $this->assertEqual(array($uppercase_file->id() => $uppercase_file->id()), $fids);
+    $this->assertEqual([$uppercase_file->id() => $uppercase_file->id()], $fids);
 
   }
 
diff --git a/core/modules/file/tests/src/Kernel/UsageTest.php b/core/modules/file/tests/src/Kernel/UsageTest.php
index 8e2601510b845c5342da99cd175b17af2bac8cb9..6752247d941746cb6b309bfe9479d0566ef610db 100644
--- a/core/modules/file/tests/src/Kernel/UsageTest.php
+++ b/core/modules/file/tests/src/Kernel/UsageTest.php
@@ -21,22 +21,22 @@ class UsageTest extends FileManagedUnitTestBase {
   function testGetUsage() {
     $file = $this->createFile();
     db_insert('file_usage')
-      ->fields(array(
+      ->fields([
         'fid' => $file->id(),
         'module' => 'testing',
         'type' => 'foo',
         'id' => 1,
         'count' => 1
-      ))
+      ])
       ->execute();
     db_insert('file_usage')
-      ->fields(array(
+      ->fields([
         'fid' => $file->id(),
         'module' => 'testing',
         'type' => 'bar',
         'id' => 2,
         'count' => 2
-      ))
+      ])
       ->execute();
 
     $usage = $this->container->get('file.usage')->listUsage($file);
@@ -81,19 +81,19 @@ function testRemoveUsage() {
     $file = $this->createFile();
     $file_usage = $this->container->get('file.usage');
     db_insert('file_usage')
-      ->fields(array(
+      ->fields([
         'fid' => $file->id(),
         'module' => 'testing',
         'type' => 'bar',
         'id' => 2,
         'count' => 3,
-      ))
+      ])
       ->execute();
 
     // Normal decrement.
     $file_usage->delete($file, 'testing', 'bar', 2);
     $count = db_select('file_usage', 'f')
-      ->fields('f', array('count'))
+      ->fields('f', ['count'])
       ->condition('f.fid', $file->id())
       ->execute()
       ->fetchField();
@@ -102,7 +102,7 @@ function testRemoveUsage() {
     // Multiple decrement and removal.
     $file_usage->delete($file, 'testing', 'bar', 2, 2);
     $count = db_select('file_usage', 'f')
-      ->fields('f', array('count'))
+      ->fields('f', ['count'])
       ->condition('f.fid', $file->id())
       ->execute()
       ->fetchField();
@@ -111,7 +111,7 @@ function testRemoveUsage() {
     // Non-existent decrement.
     $file_usage->delete($file, 'testing', 'bar', 2);
     $count = db_select('file_usage', 'f')
-      ->fields('f', array('count'))
+      ->fields('f', ['count'])
       ->condition('f.fid', $file->id())
       ->execute()
       ->fetchField();
@@ -128,10 +128,10 @@ function createTempFiles() {
     // Temporary file that is old.
     $temp_old = file_save_data('');
     db_update('file_managed')
-      ->fields(array(
+      ->fields([
         'status' => 0,
         'changed' => REQUEST_TIME - $this->config('system.file')->get('temporary_maximum_age') - 1,
-      ))
+      ])
       ->condition('fid', $temp_old->id())
       ->execute();
     $this->assertTrue(file_exists($temp_old->getFileUri()), 'Old temp file was created correctly.');
@@ -139,7 +139,7 @@ function createTempFiles() {
     // Temporary file that is new.
     $temp_new = file_save_data('');
     db_update('file_managed')
-      ->fields(array('status' => 0))
+      ->fields(['status' => 0])
       ->condition('fid', $temp_new->id())
       ->execute();
     $this->assertTrue(file_exists($temp_new->getFileUri()), 'New temp file was created correctly.');
@@ -147,7 +147,7 @@ function createTempFiles() {
     // Permanent file that is old.
     $perm_old = file_save_data('');
     db_update('file_managed')
-      ->fields(array('changed' => REQUEST_TIME - $this->config('system.file')->get('temporary_maximum_age') - 1))
+      ->fields(['changed' => REQUEST_TIME - $this->config('system.file')->get('temporary_maximum_age') - 1])
       ->condition('fid', $temp_old->id())
       ->execute();
     $this->assertTrue(file_exists($perm_old->getFileUri()), 'Old permanent file was created correctly.');
@@ -155,7 +155,7 @@ function createTempFiles() {
     // Permanent file that is new.
     $perm_new = file_save_data('');
     $this->assertTrue(file_exists($perm_new->getFileUri()), 'New permanent file was created correctly.');
-    return array($temp_old, $temp_new, $perm_old, $perm_new);
+    return [$temp_old, $temp_new, $perm_old, $perm_new];
   }
 
   /**
diff --git a/core/modules/file/tests/src/Kernel/ValidateTest.php b/core/modules/file/tests/src/Kernel/ValidateTest.php
index 0bfcfddd43ed4922be86d274e343d8868757e2ea..2fc88176a7c7eaf7663ba49f56bbfeb6d1fbc106 100644
--- a/core/modules/file/tests/src/Kernel/ValidateTest.php
+++ b/core/modules/file/tests/src/Kernel/ValidateTest.php
@@ -16,23 +16,23 @@ function testCallerValidation() {
     $file = $this->createFile();
 
     // Empty validators.
-    $this->assertEqual(file_validate($file, array()), array(), 'Validating an empty array works successfully.');
-    $this->assertFileHooksCalled(array('validate'));
+    $this->assertEqual(file_validate($file, []), [], 'Validating an empty array works successfully.');
+    $this->assertFileHooksCalled(['validate']);
 
     // Use the file_test.module's test validator to ensure that passing tests
     // return correctly.
     file_test_reset();
-    file_test_set_return('validate', array());
-    $passing = array('file_test_validator' => array(array()));
-    $this->assertEqual(file_validate($file, $passing), array(), 'Validating passes.');
-    $this->assertFileHooksCalled(array('validate'));
+    file_test_set_return('validate', []);
+    $passing = ['file_test_validator' => [[]]];
+    $this->assertEqual(file_validate($file, $passing), [], 'Validating passes.');
+    $this->assertFileHooksCalled(['validate']);
 
     // Now test for failures in validators passed in and by hook_validate.
     file_test_reset();
-    file_test_set_return('validate', array('Epic fail'));
-    $failing = array('file_test_validator' => array(array('Failed', 'Badly')));
-    $this->assertEqual(file_validate($file, $failing), array('Failed', 'Badly', 'Epic fail'), 'Validating returns errors.');
-    $this->assertFileHooksCalled(array('validate'));
+    file_test_set_return('validate', ['Epic fail']);
+    $failing = ['file_test_validator' => [['Failed', 'Badly']]];
+    $this->assertEqual(file_validate($file, $failing), ['Failed', 'Badly', 'Epic fail'], 'Validating returns errors.');
+    $this->assertFileHooksCalled(['validate']);
   }
 
 }
diff --git a/core/modules/file/tests/src/Kernel/Views/ExtensionViewsFieldTest.php b/core/modules/file/tests/src/Kernel/Views/ExtensionViewsFieldTest.php
index 221c011940b08295afcf6b5d9bd5010399f8413e..867ab7aaa10b610db718298ed44e9506bec3e181 100644
--- a/core/modules/file/tests/src/Kernel/Views/ExtensionViewsFieldTest.php
+++ b/core/modules/file/tests/src/Kernel/Views/ExtensionViewsFieldTest.php
@@ -18,21 +18,21 @@ class ExtensionViewsFieldTest extends ViewsKernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('file', 'file_test_views', 'user');
+  public static $modules = ['file', 'file_test_views', 'user'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('file_extension_view');
+  public static $testViews = ['file_extension_view'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
-    ViewTestData::createTestViews(get_class($this), array('file_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['file_test_views']);
 
     $this->installEntitySchema('file');
 
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/process/d6/CckFileTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/process/d6/CckFileTest.php
index 1ee73a83eee735cfea0d3fbdb231c2daf56e3ed9..1cce9898e8c6316a9193f71731309c2ca74ce856 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/process/d6/CckFileTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/process/d6/CckFileTest.php
@@ -25,26 +25,26 @@ public function testTransformAltTitle() {
     $migration_plugin = $this->prophesize(MigrateProcessInterface::class);
     $migration_plugin->transform(1, $executable, $row, 'foo')->willReturn(1);
 
-    $plugin = new CckFile(array(), 'd6_cck_file', array(), $migration, $migration_plugin->reveal());
+    $plugin = new CckFile([], 'd6_cck_file', [], $migration, $migration_plugin->reveal());
 
-    $options = array(
+    $options = [
       'alt' => 'Foobaz',
       'title' => 'Wambooli',
-    );
-    $value = array(
+    ];
+    $value = [
       'fid' => 1,
       'list' => TRUE,
       'data' => serialize($options),
-    );
+    ];
 
     $transformed = $plugin->transform($value, $executable, $row, 'foo');
-    $expected = array(
+    $expected = [
       'target_id' => 1,
       'display' => TRUE,
       'description' => '',
       'alt' => 'Foobaz',
       'title' => 'Wambooli',
-    );
+    ];
     $this->assertSame($expected, $transformed);
   }
 
diff --git a/core/modules/filter/filter.api.php b/core/modules/filter/filter.api.php
index 5bf973f4e7bb7e6a6cd3d1e5a41690d9ad581776..bf4c52e83d29b9c51ebc810b5da938a35d2fb1ab 100644
--- a/core/modules/filter/filter.api.php
+++ b/core/modules/filter/filter.api.php
@@ -18,9 +18,9 @@
  */
 function hook_filter_info_alter(&$info) {
   // Alter the default settings of the URL filter provided by core.
-  $info['filter_url']['default_settings'] = array(
+  $info['filter_url']['default_settings'] = [
     'filter_url_length' => 100,
-  );
+  ];
 }
 
 /**
diff --git a/core/modules/filter/filter.module b/core/modules/filter/filter.module
index f52614a42548a06c64d47d885cd6904ac2012b71..e3095346ddaa8875230d916e9bd9e1c09ee04d4d 100644
--- a/core/modules/filter/filter.module
+++ b/core/modules/filter/filter.module
@@ -21,11 +21,11 @@ function filter_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.filter':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Filter module allows administrators to configure text formats. Text formats change how HTML tags and other text will be <em>processed and displayed</em> in the site. They are used to transform text, and also help to defend your web site against potentially damaging input from malicious users. Visual text editors can be associated with text formats by using the <a href=":editor_help">Text Editor module</a>. For more information, see the <a href=":filter_do">online documentation for the Filter module</a>.', array(':filter_do' => 'https://www.drupal.org/documentation/modules/filter/', ':editor_help' => (\Drupal::moduleHandler()->moduleExists('editor')) ? \Drupal::url('help.page', array('name' => 'editor')) : '#')) . '</p>';
+      $output .= '<p>' . t('The Filter module allows administrators to configure text formats. Text formats change how HTML tags and other text will be <em>processed and displayed</em> in the site. They are used to transform text, and also help to defend your web site against potentially damaging input from malicious users. Visual text editors can be associated with text formats by using the <a href=":editor_help">Text Editor module</a>. For more information, see the <a href=":filter_do">online documentation for the Filter module</a>.', [':filter_do' => 'https://www.drupal.org/documentation/modules/filter/', ':editor_help' => (\Drupal::moduleHandler()->moduleExists('editor')) ? \Drupal::url('help.page', ['name' => 'editor']) : '#']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing text formats') . '</dt>';
-      $output .= '<dd>' . t('You can create and edit text formats on the <a href=":formats">Text formats page</a> (if the Text Editor module is enabled, this page is named Text formats and editors). One text format is included by default: Plain text (which removes all HTML tags). Additional text formats may be created during installation. You can create a text format by clicking "<a href=":add_format">Add text format</a>".', array(':formats' => \Drupal::url('filter.admin_overview'), ':add_format' => \Drupal::url('filter.format_add'))) . '</dd>';
+      $output .= '<dd>' . t('You can create and edit text formats on the <a href=":formats">Text formats page</a> (if the Text Editor module is enabled, this page is named Text formats and editors). One text format is included by default: Plain text (which removes all HTML tags). Additional text formats may be created during installation. You can create a text format by clicking "<a href=":add_format">Add text format</a>".', [':formats' => \Drupal::url('filter.admin_overview'), ':add_format' => \Drupal::url('filter.format_add')]) . '</dd>';
       $output .= '<dt>' . t('Assigning roles to text formats') . '</dt>';
       $output .= '<dd>' . t('You can define which users will be able to use each text format by selecting roles. To ensure security, anonymous and untrusted users should only have access to text formats that restrict them to either plain text or a safe set of HTML tags. This is because HTML tags can allow embedding malicious links or scripts in text. More trusted registered users may be granted permission to use less restrictive text formats in order to create rich text. <strong>Improper text format configuration is a security risk.</strong>') . '</dd>';
       $output .= '<dt>' . t('Selecting filters') . '</dt>';
@@ -39,7 +39,7 @@ function filter_help($route_name, RouteMatchInterface $route_match) {
       return $output;
 
     case 'filter.admin_overview':
-      $output = '<p>' . t('Text formats define how text is filtered for output and how HTML tags and other text is displayed, replaced, or removed. <strong>Improper text format configuration is a security risk.</strong> Learn more on the <a href=":filter_help">Filter module help page</a>.', array(':filter_help' => \Drupal::url('help.page', array('name' => 'filter')))) . '</p>';
+      $output = '<p>' . t('Text formats define how text is filtered for output and how HTML tags and other text is displayed, replaced, or removed. <strong>Improper text format configuration is a security risk.</strong> Learn more on the <a href=":filter_help">Filter module help page</a>.', [':filter_help' => \Drupal::url('help.page', ['name' => 'filter'])]) . '</p>';
       $output .= '<p>' . t('Text formats are presented on content editing pages in the order defined on this page. The first format available to a user will be selected by default.') . '</p>';
       return $output;
 
@@ -53,29 +53,29 @@ function filter_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function filter_theme() {
-  return array(
-    'filter_tips' => array(
-      'variables' => array('tips' => NULL, 'long' => FALSE),
-    ),
-    'text_format_wrapper' => array(
-      'variables' => array(
+  return [
+    'filter_tips' => [
+      'variables' => ['tips' => NULL, 'long' => FALSE],
+    ],
+    'text_format_wrapper' => [
+      'variables' => [
         'children' => NULL,
         'description' => NULL,
-        'attributes' => array(),
-      ),
-    ),
-    'filter_guidelines' => array(
-      'variables' => array('format' => NULL),
-    ),
-    'filter_caption' => array(
-      'variables' => array(
+        'attributes' => [],
+      ],
+    ],
+    'filter_guidelines' => [
+      'variables' => ['format' => NULL],
+    ],
+    'filter_caption' => [
+      'variables' => [
         'node' => NULL,
         'tag' => NULL,
         'caption' => NULL,
         'classes' => NULL,
-      ),
-    )
-  );
+      ],
+    ]
+  ];
 }
 
 /**
@@ -93,7 +93,7 @@ function filter_theme() {
  * @see filter_formats_reset()
  */
 function filter_formats(AccountInterface $account = NULL) {
-  $formats = &drupal_static(__FUNCTION__, array());
+  $formats = &drupal_static(__FUNCTION__, []);
 
   // All available formats are cached for performance.
   if (!isset($formats['all'])) {
@@ -102,7 +102,7 @@ function filter_formats(AccountInterface $account = NULL) {
       $formats['all'] = $cache->data;
     }
     else {
-      $formats['all'] = \Drupal::entityManager()->getStorage('filter_format')->loadByProperties(array('status' => TRUE));
+      $formats['all'] = \Drupal::entityManager()->getStorage('filter_format')->loadByProperties(['status' => TRUE]);
       uasort($formats['all'], 'Drupal\Core\Config\Entity\ConfigEntityBase::sort');
       \Drupal::cache()->set("filter_formats:{$language_interface->getId()}", $formats['all'], Cache::PERMANENT, \Drupal::entityManager()->getDefinition('filter_format')->getListCacheTags());
     }
@@ -116,7 +116,7 @@ function filter_formats(AccountInterface $account = NULL) {
   // Build a list of user-specific formats.
   $account_id = $account->id();
   if (!isset($formats['user'][$account_id])) {
-    $formats['user'][$account_id] = array();
+    $formats['user'][$account_id] = [];
     foreach ($formats['all'] as $format) {
       if ($format->access('use', $account)) {
         $formats['user'][$account_id][$format->id()] = $format;
@@ -152,7 +152,7 @@ function filter_get_roles_by_format(FilterFormatInterface $format) {
   }
   // Do not list any roles if the permission does not exist.
   $permission = $format->getPermissionName();
-  return !empty($permission) ? user_role_names(FALSE, $permission) : array();
+  return !empty($permission) ? user_role_names(FALSE, $permission) : [];
 }
 
 /**
@@ -166,7 +166,7 @@ function filter_get_roles_by_format(FilterFormatInterface $format) {
  *   the text format ID and ordered by weight.
  */
 function filter_get_formats_by_role($rid) {
-  $formats = array();
+  $formats = [];
   foreach (filter_formats() as $format) {
     $roles = filter_get_roles_by_format($format);
     if (isset($roles[$rid])) {
@@ -291,14 +291,14 @@ function filter_fallback_format() {
  *
  * @ingroup sanitization
  */
-function check_markup($text, $format_id = NULL, $langcode = '', $filter_types_to_skip = array()) {
-  $build = array(
+function check_markup($text, $format_id = NULL, $langcode = '', $filter_types_to_skip = []) {
+  $build = [
     '#type' => 'processed_text',
     '#text' => $text,
     '#format' => $format_id,
     '#filter_types_to_skip' => $filter_types_to_skip,
     '#langcode' => $langcode,
-  );
+  ];
   return \Drupal::service('renderer')->renderPlain($build);
 }
 
@@ -337,11 +337,11 @@ function filter_form_access_denied($element) {
 function _filter_tips($format_id, $long = FALSE) {
   $formats = filter_formats(\Drupal::currentUser());
 
-  $tips = array();
+  $tips = [];
 
   // If only listing one format, extract it from the $formats array.
   if ($format_id != -1) {
-    $formats = array($formats[$format_id]);
+    $formats = [$formats[$format_id]];
   }
 
   foreach ($formats as $format) {
@@ -349,10 +349,10 @@ function _filter_tips($format_id, $long = FALSE) {
       if ($filter->status) {
         $tip = $filter->tips($long);
         if (isset($tip)) {
-          $tips[$format->label()][$name] = array(
-            'tip' => array('#markup' => $tip),
+          $tips[$format->label()][$name] = [
+            'tip' => ['#markup' => $tip],
             'id' => $name,
-          );
+          ];
         }
       }
     }
@@ -372,10 +372,10 @@ function _filter_tips($format_id, $long = FALSE) {
  */
 function template_preprocess_filter_guidelines(&$variables) {
   $format = $variables['format'];
-  $variables['tips'] = array(
+  $variables['tips'] = [
     '#theme' => 'filter_tips',
     '#tips' => _filter_tips($format->id(), FALSE),
-  );
+  ];
 }
 
 /**
@@ -431,11 +431,11 @@ function template_preprocess_filter_tips(&$variables) {
       $tiplist[$tip_key]['attributes'] = new Attribute();
     }
 
-    $variables['tips'][$name] = array(
+    $variables['tips'][$name] = [
       'attributes' => new Attribute(),
       'name' => $name,
       'list' => $tiplist,
-    );
+    ];
   }
 
   $variables['multiple'] = count($tips) > 1;
@@ -470,7 +470,7 @@ function _filter_url($text, $filter) {
   // callback function to process matches of the regexp. The callback function
   // is to return the replacement for the match. The array is used and
   // matching/replacement done below inside some loops.
-  $tasks = array();
+  $tasks = [];
 
   // Prepare protocols pattern for absolute URLs.
   // \Drupal\Component\Utility\UrlHelper::stripDangerousProtocols() will replace
@@ -643,12 +643,12 @@ function _filter_url_parse_partial_links($match) {
  *   cached $comments are reset.
  */
 function _filter_url_escape_comments($match, $escape = NULL) {
-  static $mode, $comments = array();
+  static $mode, $comments = [];
 
   if (isset($escape)) {
     $mode = $escape;
     if ($escape) {
-      $comments = array();
+      $comments = [];
     }
     return;
   }
diff --git a/core/modules/filter/src/Annotation/Filter.php b/core/modules/filter/src/Annotation/Filter.php
index 9d7d1ccee322f7eb44efab6fe0767062bb988467..4d90c584263df8e63e5652475238070a194cc39c 100644
--- a/core/modules/filter/src/Annotation/Filter.php
+++ b/core/modules/filter/src/Annotation/Filter.php
@@ -73,6 +73,6 @@ class Filter extends Plugin {
    *
    * @var array (optional)
    */
-  public $settings = array();
+  public $settings = [];
 
 }
diff --git a/core/modules/filter/src/Controller/FilterController.php b/core/modules/filter/src/Controller/FilterController.php
index f5ebe7991c66b6a51b2ee6c3b322d599cf10769e..09652b7d8cda27b07e6834da213a30f738536278 100644
--- a/core/modules/filter/src/Controller/FilterController.php
+++ b/core/modules/filter/src/Controller/FilterController.php
@@ -24,11 +24,11 @@ class FilterController {
   function filterTips(FilterFormatInterface $filter_format = NULL) {
     $tips = $filter_format ? $filter_format->id() : -1;
 
-    $build = array(
+    $build = [
       '#theme' => 'filter_tips',
       '#long' => TRUE,
       '#tips' => _filter_tips($tips, TRUE),
-    );
+    ];
 
     return $build;
   }
diff --git a/core/modules/filter/src/Element/ProcessedText.php b/core/modules/filter/src/Element/ProcessedText.php
index 0d0987039581bd0de76204542cccbc886e715dc8..6e2b3ec43e8726c44e71d6dbd4ffedc80303aacc 100644
--- a/core/modules/filter/src/Element/ProcessedText.php
+++ b/core/modules/filter/src/Element/ProcessedText.php
@@ -21,15 +21,15 @@ class ProcessedText extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#text' => '',
       '#format' => NULL,
-      '#filter_types_to_skip' => array(),
+      '#filter_types_to_skip' => [],
       '#langcode' => '',
-      '#pre_render' => array(
-        array($class, 'preRenderText'),
-      ),
-    );
+      '#pre_render' => [
+        [$class, 'preRenderText'],
+      ],
+    ];
   }
 
   /**
@@ -77,7 +77,7 @@ public static function preRenderText($element) {
     // cannot be filtered.
     if (!$format || !$format->status()) {
       $message = !$format ? 'Missing text format: %format.' : 'Disabled text format: %format.';
-      static::logger('filter')->alert($message, array('%format' => $format_id));
+      static::logger('filter')->alert($message, ['%format' => $format_id]);
       $element['#markup'] = '';
       return $element;
     }
@@ -92,7 +92,7 @@ public static function preRenderText($element) {
 
     // Convert all Windows and Mac newlines to a single newline, so filters only
     // need to deal with one possibility.
-    $text = str_replace(array("\r\n", "\r"), "\n", $text);
+    $text = str_replace(["\r\n", "\r"], "\n", $text);
 
     // Get a complete list of filters, ordered properly.
     /** @var \Drupal\filter\Plugin\FilterInterface[] $filters **/
diff --git a/core/modules/filter/src/Element/TextFormat.php b/core/modules/filter/src/Element/TextFormat.php
index 0a80b314b32353a20f0d5e0a294d95243f695c53..16b4cf5207d7b5e0aeb690eb94755c2f328df043 100644
--- a/core/modules/filter/src/Element/TextFormat.php
+++ b/core/modules/filter/src/Element/TextFormat.php
@@ -40,13 +40,13 @@ class TextFormat extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#process' => array(
-        array($class, 'processFormat'),
-      ),
+    return [
+      '#process' => [
+        [$class, 'processFormat'],
+      ],
       '#base_type' => 'textarea',
-      '#theme_wrappers' => array('text_format_wrapper'),
-    );
+      '#theme_wrappers' => ['text_format_wrapper'],
+    ];
   }
 
   /**
@@ -84,7 +84,7 @@ public static function processFormat(&$element, FormStateInterface $form_state,
 
     // Ensure that children appear as subkeys of this element.
     $element['#tree'] = TRUE;
-    $blacklist = array(
+    $blacklist = [
       // Make \Drupal::formBuilder()->doBuildForm() regenerate child properties.
       '#parents',
       '#id',
@@ -104,7 +104,7 @@ public static function processFormat(&$element, FormStateInterface $form_state,
       '#attached',
       '#processed',
       '#theme_wrappers',
-    );
+    ];
     // Move this element into sub-element 'value'.
     unset($element['value']);
     foreach (Element::properties($element) as $key) {
@@ -116,16 +116,16 @@ public static function processFormat(&$element, FormStateInterface $form_state,
     $element['value']['#type'] = $element['#base_type'];
     $element['value'] += static::elementInfo()->getInfo($element['#base_type']);
     // Make sure the #default_value key is set, so we can use it below.
-    $element['value'] += array('#default_value' => '');
+    $element['value'] += ['#default_value' => ''];
 
     // Turn original element into a text format wrapper.
     $element['#attached']['library'][] = 'filter/drupal.filter';
 
     // Setup child container for the text format widget.
-    $element['format'] = array(
+    $element['format'] = [
       '#type' => 'container',
-      '#attributes' => array('class' => array('filter-wrapper')),
-    );
+      '#attributes' => ['class' => ['filter-wrapper']],
+    ];
 
     // Get a list of formats that the current user has access to.
     $formats = filter_formats($user);
@@ -162,30 +162,30 @@ public static function processFormat(&$element, FormStateInterface $form_state,
     }
 
     // Prepare text format guidelines.
-    $element['format']['guidelines'] = array(
+    $element['format']['guidelines'] = [
       '#type' => 'container',
-      '#attributes' => array('class' => array('filter-guidelines')),
+      '#attributes' => ['class' => ['filter-guidelines']],
       '#weight' => 20,
-    );
-    $options = array();
+    ];
+    $options = [];
     foreach ($formats as $format) {
       $options[$format->id()] = $format->label();
-      $element['format']['guidelines'][$format->id()] = array(
+      $element['format']['guidelines'][$format->id()] = [
         '#theme' => 'filter_guidelines',
         '#format' => $format,
-      );
+      ];
     }
 
-    $element['format']['format'] = array(
+    $element['format']['format'] = [
       '#type' => 'select',
       '#title' => t('Text format'),
       '#options' => $options,
       '#default_value' => $element['#format'],
       '#access' => count($formats) > 1,
       '#weight' => 10,
-      '#attributes' => array('class' => array('filter-list')),
-      '#parents' => array_merge($element['#parents'], array('format')),
-    );
+      '#attributes' => ['class' => ['filter-list']],
+      '#parents' => array_merge($element['#parents'], ['format']),
+    ];
 
     $element['format']['help'] = [
       '#type' => 'container',
@@ -225,7 +225,7 @@ public static function processFormat(&$element, FormStateInterface $form_state,
 
       // Prepend #pre_render callback to replace field value with user notice
       // prior to rendering.
-      $element['value'] += array('#pre_render' => array());
+      $element['value'] += ['#pre_render' => []];
       array_unshift($element['value']['#pre_render'], 'filter_form_access_denied');
 
       // Cosmetic adjustments.
diff --git a/core/modules/filter/src/Entity/FilterFormat.php b/core/modules/filter/src/Entity/FilterFormat.php
index 8ae4d6032b7be35834dca9698e9b87a37ce83fb3..9dbaa62fd2c21d341fd3df433a039b65511d9ef2 100644
--- a/core/modules/filter/src/Entity/FilterFormat.php
+++ b/core/modules/filter/src/Entity/FilterFormat.php
@@ -112,7 +112,7 @@ class FilterFormat extends ConfigEntityBase implements FilterFormatInterface, En
    *
    * @var array
    */
-  protected $filters = array();
+  protected $filters = [];
 
   /**
    * Holds the collection of filters that are attached to this format.
@@ -146,7 +146,7 @@ public function filters($instance_id = NULL) {
    * {@inheritdoc}
    */
   public function getPluginCollections() {
-    return array('filters' => $this->filters());
+    return ['filters' => $this->filters()];
   }
 
   /**
@@ -182,7 +182,7 @@ public function disable() {
     parent::disable();
 
     // Allow modules to react on text format deletion.
-    \Drupal::moduleHandler()->invokeAll('filter_format_disable', array($this));
+    \Drupal::moduleHandler()->invokeAll('filter_format_disable', [$this]);
 
     // Clear the filter cache whenever a text format is disabled.
     filter_formats_reset();
@@ -222,7 +222,7 @@ public function postSave(EntityStorageInterface $storage, $update = TRUE) {
       if (($roles = $this->get('roles')) && $permission = $this->getPermissionName()) {
         foreach (user_roles() as $rid => $name) {
           $enabled = in_array($rid, $roles, TRUE);
-          user_role_change_permissions($rid, array($permission => $enabled));
+          user_role_change_permissions($rid, [$permission => $enabled]);
         }
       }
     }
@@ -252,7 +252,7 @@ public function getPermissionName() {
    * {@inheritdoc}
    */
   public function getFilterTypes() {
-    $filter_types = array();
+    $filter_types = [];
 
     $filters = $this->filters();
     foreach ($filters as $filter) {
@@ -386,7 +386,7 @@ public function getHtmlRestrictions() {
       // whitelisting filters were used, then effectively nothing is allowed.
       if (isset($restrictions['allowed'])) {
         if (count($restrictions['allowed']) === 1 && array_key_exists('*', $restrictions['allowed']) && !isset($restrictions['forbidden_tags'])) {
-          $restrictions['allowed'] = array();
+          $restrictions['allowed'] = [];
         }
       }
 
diff --git a/core/modules/filter/src/FilterFormatAccessControlHandler.php b/core/modules/filter/src/FilterFormatAccessControlHandler.php
index 0c411a729809c715c2c232cc2415fc36419059c9..090944aa08d192366fc6dfd2e2d5d7d670e0dd12 100644
--- a/core/modules/filter/src/FilterFormatAccessControlHandler.php
+++ b/core/modules/filter/src/FilterFormatAccessControlHandler.php
@@ -41,7 +41,7 @@ protected function checkAccess(EntityInterface $filter_format, $operation, Accou
       return AccessResult::forbidden();
     }
 
-    if (in_array($operation, array('disable', 'update'))) {
+    if (in_array($operation, ['disable', 'update'])) {
       return parent::checkAccess($filter_format, $operation, $account);
     }
 
diff --git a/core/modules/filter/src/FilterFormatAddForm.php b/core/modules/filter/src/FilterFormatAddForm.php
index 1cc855f3f5246a82913bb527e18f6d43ae382697..cb9b59881b911bbf71f54bcc7a88470cc924273c 100644
--- a/core/modules/filter/src/FilterFormatAddForm.php
+++ b/core/modules/filter/src/FilterFormatAddForm.php
@@ -21,7 +21,7 @@ public function form(array $form, FormStateInterface $form_state) {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     parent::submitForm($form, $form_state);
-    drupal_set_message($this->t('Added text format %format.', array('%format' => $this->entity->label())));
+    drupal_set_message($this->t('Added text format %format.', ['%format' => $this->entity->label()]));
     return $this->entity;
   }
 
diff --git a/core/modules/filter/src/FilterFormatEditForm.php b/core/modules/filter/src/FilterFormatEditForm.php
index ee2f7fb084e33232f52b16290c6cbc04fecb733e..9ffd8c86c77a969db8737debba31f918ea3c3f47 100644
--- a/core/modules/filter/src/FilterFormatEditForm.php
+++ b/core/modules/filter/src/FilterFormatEditForm.php
@@ -29,7 +29,7 @@ public function form(array $form, FormStateInterface $form_state) {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     parent::submitForm($form, $form_state);
-    drupal_set_message($this->t('The text format %format has been updated.', array('%format' => $this->entity->label())));
+    drupal_set_message($this->t('The text format %format has been updated.', ['%format' => $this->entity->label()]));
     return $this->entity;
   }
 
diff --git a/core/modules/filter/src/FilterFormatFormBase.php b/core/modules/filter/src/FilterFormatFormBase.php
index c60171ca0bf80e1c2d820b8d1bcb97779ce70560..cbcb632189b77fbe356ac689f1b3f91b17cea901 100644
--- a/core/modules/filter/src/FilterFormatFormBase.php
+++ b/core/modules/filter/src/FilterFormatFormBase.php
@@ -21,34 +21,34 @@ public function form(array $form, FormStateInterface $form_state) {
     $form['#tree'] = TRUE;
     $form['#attached']['library'][] = 'filter/drupal.filter.admin';
 
-    $form['name'] = array(
+    $form['name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Name'),
       '#default_value' => $format->label(),
       '#required' => TRUE,
       '#weight' => -30,
-    );
-    $form['format'] = array(
+    ];
+    $form['format'] = [
       '#type' => 'machine_name',
       '#required' => TRUE,
       '#default_value' => $format->id(),
       '#maxlength' => 255,
-      '#machine_name' => array(
-        'exists' => array($this, 'exists'),
-        'source' => array('name'),
-      ),
+      '#machine_name' => [
+        'exists' => [$this, 'exists'],
+        'source' => ['name'],
+      ],
       '#disabled' => !$format->isNew(),
       '#weight' => -20,
-    );
+    ];
 
     // Add user role access selection.
-    $form['roles'] = array(
+    $form['roles'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Roles'),
       '#options' => array_map('\Drupal\Component\Utility\Html::escape', user_role_names()),
       '#disabled' => $is_fallback,
       '#weight' => -10,
-    );
+    ];
     if ($is_fallback) {
       $form['roles']['#description'] = $this->t('All roles for this text format must be enabled and cannot be changed.');
     }
@@ -64,13 +64,13 @@ public function form(array $form, FormStateInterface $form_state) {
       // When a filter is missing, it is replaced by the null filter. Remove it
       // here, so that saving the form will remove the missing filter.
       if ($filter instanceof FilterNull) {
-        drupal_set_message($this->t('The %filter filter is missing, and will be removed once this format is saved.', array('%filter' => $filter_id)), 'warning');
+        drupal_set_message($this->t('The %filter filter is missing, and will be removed once this format is saved.', ['%filter' => $filter_id]), 'warning');
         $filters->removeInstanceID($filter_id);
       }
     }
 
     // Filter status.
-    $form['filters']['status'] = array(
+    $form['filters']['status'] = [
       '#type' => 'item',
       '#title' => $this->t('Enabled filters'),
       '#prefix' => '<div id="filters-status-wrapper">',
@@ -79,72 +79,72 @@ public function form(array $form, FormStateInterface $form_state) {
       // value, since 'filters' should only contain filter definitions.
       // See https://www.drupal.org/node/1829202.
       '#input' => FALSE,
-    );
+    ];
     // Filter order (tabledrag).
-    $form['filters']['order'] = array(
+    $form['filters']['order'] = [
       '#type' => 'table',
       // For filter.admin.js
-      '#attributes' => array('id' => 'filter-order'),
+      '#attributes' => ['id' => 'filter-order'],
       '#title' => $this->t('Filter processing order'),
-      '#tabledrag' => array(
-        array(
+      '#tabledrag' => [
+        [
          'action' => 'order',
          'relationship' => 'sibling',
          'group' => 'filter-order-weight',
-        ),
-      ),
+        ],
+      ],
       '#tree' => FALSE,
       '#input' => FALSE,
-      '#theme_wrappers' => array('form_element'),
-    );
+      '#theme_wrappers' => ['form_element'],
+    ];
     // Filter settings.
-    $form['filter_settings'] = array(
+    $form['filter_settings'] = [
       '#type' => 'vertical_tabs',
       '#title' => $this->t('Filter settings'),
-    );
+    ];
 
     foreach ($filters as $name => $filter) {
-      $form['filters']['status'][$name] = array(
+      $form['filters']['status'][$name] = [
         '#type' => 'checkbox',
         '#title' => $filter->getLabel(),
         '#default_value' => $filter->status,
-        '#parents' => array('filters', $name, 'status'),
+        '#parents' => ['filters', $name, 'status'],
         '#description' => $filter->getDescription(),
         '#weight' => $filter->weight,
-      );
+      ];
 
       $form['filters']['order'][$name]['#attributes']['class'][] = 'draggable';
       $form['filters']['order'][$name]['#weight'] = $filter->weight;
-      $form['filters']['order'][$name]['filter'] = array(
+      $form['filters']['order'][$name]['filter'] = [
         '#markup' => $filter->getLabel(),
-      );
-      $form['filters']['order'][$name]['weight'] = array(
+      ];
+      $form['filters']['order'][$name]['weight'] = [
         '#type' => 'weight',
-        '#title' => $this->t('Weight for @title', array('@title' => $filter->getLabel())),
+        '#title' => $this->t('Weight for @title', ['@title' => $filter->getLabel()]),
         '#title_display' => 'invisible',
         '#delta' => 50,
         '#default_value' => $filter->weight,
-        '#parents' => array('filters', $name, 'weight'),
-        '#attributes' => array('class' => array('filter-order-weight')),
-      );
+        '#parents' => ['filters', $name, 'weight'],
+        '#attributes' => ['class' => ['filter-order-weight']],
+      ];
 
       // Retrieve the settings form of the filter plugin. The plugin should not be
       // aware of the text format. Therefore, it only receives a set of minimal
       // base properties to allow advanced implementations to work.
-      $settings_form = array(
-        '#parents' => array('filters', $name, 'settings'),
+      $settings_form = [
+        '#parents' => ['filters', $name, 'settings'],
         '#tree' => TRUE,
-      );
+      ];
       $settings_form = $filter->settingsForm($settings_form, $form_state);
       if (!empty($settings_form)) {
-        $form['filters']['settings'][$name] = array(
+        $form['filters']['settings'][$name] = [
           '#type' => 'details',
           '#title' => $filter->getLabel(),
           '#open' => TRUE,
           '#weight' => $filter->weight,
-          '#parents' => array('filters', $name, 'settings'),
+          '#parents' => ['filters', $name, 'settings'],
           '#group' => 'filter_settings',
-        );
+        ];
         $form['filters']['settings'][$name] += $settings_form;
       }
     }
@@ -189,7 +189,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
       ->condition('name', $format_name)
       ->execute();
     if ($format_exists) {
-      $form_state->setErrorByName('name', $this->t('Text format names must be unique. A format named %name already exists.', array('%name' => $format_name)));
+      $form_state->setErrorByName('name', $this->t('Text format names must be unique. A format named %name already exists.', ['%name' => $format_name]));
     }
   }
 
@@ -216,7 +216,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     // Save user permissions.
     if ($permission = $format->getPermissionName()) {
       foreach ($form_state->getValue('roles') as $rid => $enabled) {
-        user_role_change_permissions($rid, array($permission => $enabled));
+        user_role_change_permissions($rid, [$permission => $enabled]);
       }
     }
 
diff --git a/core/modules/filter/src/FilterPluginCollection.php b/core/modules/filter/src/FilterPluginCollection.php
index fc6ec06c301419fa4f00d1633059f87df9c3223f..81ebddf4728f17f96ed969e7d1f52698c665da0d 100644
--- a/core/modules/filter/src/FilterPluginCollection.php
+++ b/core/modules/filter/src/FilterPluginCollection.php
@@ -114,7 +114,7 @@ public function getConfiguration() {
     // Because filters are disabled by default, this will never remove the
     // configuration of an enabled filter.
     foreach ($configuration as $instance_id => $instance_config) {
-      $default_config = array();
+      $default_config = [];
       $default_config['id'] = $instance_id;
       $default_config += $this->get($instance_id)->defaultConfiguration();
       if ($default_config === $instance_config) {
diff --git a/core/modules/filter/src/FilterPluginManager.php b/core/modules/filter/src/FilterPluginManager.php
index d369a6ffa6135e0472da1e1f1310b47dc1a8b911..f41e016c0b52aae0bd16a53d727b92e07e326ff4 100644
--- a/core/modules/filter/src/FilterPluginManager.php
+++ b/core/modules/filter/src/FilterPluginManager.php
@@ -38,7 +38,7 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
   /**
    * {@inheritdoc}
    */
-  public function getFallbackPluginId($plugin_id, array $configuration = array()) {
+  public function getFallbackPluginId($plugin_id, array $configuration = []) {
     return 'filter_null';
   }
 
diff --git a/core/modules/filter/src/Form/FilterDisableForm.php b/core/modules/filter/src/Form/FilterDisableForm.php
index a4582fc3f691dc0831bab6ea8e1d9f671c924e2a..c6e82949fd7e0e7d125aff913c36aee32d4c381a 100644
--- a/core/modules/filter/src/Form/FilterDisableForm.php
+++ b/core/modules/filter/src/Form/FilterDisableForm.php
@@ -15,7 +15,7 @@ class FilterDisableForm extends EntityConfirmFormBase {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to disable the text format %format?', array('%format' => $this->entity->label()));
+    return $this->t('Are you sure you want to disable the text format %format?', ['%format' => $this->entity->label()]);
   }
 
   /**
@@ -44,7 +44,7 @@ public function getDescription() {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->entity->disable()->save();
-    drupal_set_message($this->t('Disabled text format %format.', array('%format' => $this->entity->label())));
+    drupal_set_message($this->t('Disabled text format %format.', ['%format' => $this->entity->label()]));
 
     $form_state->setRedirectUrl($this->getCancelUrl());
   }
diff --git a/core/modules/filter/src/Plugin/Filter/FilterAlign.php b/core/modules/filter/src/Plugin/Filter/FilterAlign.php
index c0e431ae3e0d39b93747a7c61776cf839ad2cb45..a3739ab8246d3ebb1d965f5a92d045af1ef18b9b 100644
--- a/core/modules/filter/src/Plugin/Filter/FilterAlign.php
+++ b/core/modules/filter/src/Plugin/Filter/FilterAlign.php
@@ -33,9 +33,9 @@ public function process($text, $langcode) {
         $node->removeAttribute('data-align');
 
         // If one of the allowed alignments, add the corresponding class.
-        if (in_array($align, array('left', 'center', 'right'))) {
+        if (in_array($align, ['left', 'center', 'right'])) {
           $classes = $node->getAttribute('class');
-          $classes = (strlen($classes) > 0) ? explode(' ', $classes) : array();
+          $classes = (strlen($classes) > 0) ? explode(' ', $classes) : [];
           $classes[] = 'align-' . $align;
           $node->setAttribute('class', implode(' ', $classes));
         }
diff --git a/core/modules/filter/src/Plugin/Filter/FilterCaption.php b/core/modules/filter/src/Plugin/Filter/FilterCaption.php
index c23f1f784fa7c6692957bf008b46beef1958609a..62c83950369b82b037a488ce710baba3cde45206 100644
--- a/core/modules/filter/src/Plugin/Filter/FilterCaption.php
+++ b/core/modules/filter/src/Plugin/Filter/FilterCaption.php
@@ -40,7 +40,7 @@ public function process($text, $langcode) {
         // Sanitize caption: decode HTML encoding, limit allowed HTML tags; only
         // allow inline tags that are allowed by default, plus <br>.
         $caption = Html::decodeEntities($caption);
-        $caption = FilteredMarkup::create(Xss::filter($caption, array('a', 'em', 'strong', 'cite', 'code', 'br')));
+        $caption = FilteredMarkup::create(Xss::filter($caption, ['a', 'em', 'strong', 'cite', 'code', 'br']));
 
         // The caption must be non-empty.
         if (Unicode::strlen($caption) === 0) {
@@ -54,7 +54,7 @@ public function process($text, $langcode) {
         $classes = $node->getAttribute('class');
         $node->removeAttribute('class');
         $node = ($node->parentNode->tagName === 'a') ? $node->parentNode : $node;
-        $filter_caption = array(
+        $filter_caption = [
           '#theme' => 'filter_caption',
           // We pass the unsanitized string because this is a text format
           // filter, and after filtering, we always assume the output is safe.
@@ -63,7 +63,7 @@ public function process($text, $langcode) {
           '#tag' => $tag,
           '#caption' => $caption,
           '#classes' => $classes,
-        );
+        ];
         $altered_html = drupal_render($filter_caption);
 
         // Load the altered HTML into a new DOMDocument and retrieve the element.
@@ -82,11 +82,11 @@ public function process($text, $langcode) {
       }
 
       $result->setProcessedText(Html::serialize($dom))
-        ->addAttachments(array(
-          'library' => array(
+        ->addAttachments([
+          'library' => [
             'filter/caption',
-          ),
-        ));
+          ],
+        ]);
     }
 
     return $result;
diff --git a/core/modules/filter/src/Plugin/Filter/FilterHtml.php b/core/modules/filter/src/Plugin/Filter/FilterHtml.php
index 1dc71fba01ebcd89838a8088811bf78844ef966c..882bcc0e166e680e5cec29b1f4961ce463a54a46 100644
--- a/core/modules/filter/src/Plugin/Filter/FilterHtml.php
+++ b/core/modules/filter/src/Plugin/Filter/FilterHtml.php
@@ -40,27 +40,27 @@ class FilterHtml extends FilterBase {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $form['allowed_html'] = array(
+    $form['allowed_html'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Allowed HTML tags'),
       '#default_value' => $this->settings['allowed_html'],
       '#description' => $this->t('A list of HTML tags that can be used. By default only the <em>lang</em> and <em>dir</em> attributes are allowed for all HTML tags. Each HTML tag may have attributes which are treated as allowed attribute names for that HTML tag. Each attribute may allow all values, or only allow specific values. Attribute names or values may be written as a prefix and wildcard like <em>jump-*</em>. JavaScript event attributes, JavaScript URLs, and CSS are always stripped.'),
-      '#attached' => array(
-        'library' => array(
+      '#attached' => [
+        'library' => [
           'filter/drupal.filter.filter_html.admin',
-        ),
-      ),
-    );
-    $form['filter_html_help'] = array(
+        ],
+      ],
+    ];
+    $form['filter_html_help'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Display basic HTML help in long filter tips'),
       '#default_value' => $this->settings['filter_html_help'],
-    );
-    $form['filter_html_nofollow'] = array(
+    ];
+    $form['filter_html_nofollow'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Add rel="nofollow" to all links'),
       '#default_value' => $this->settings['filter_html_nofollow'],
-    );
+    ];
     return $form;
   }
 
@@ -339,7 +339,7 @@ public function tips($long = FALSE) {
     if (!($allowed_html = $this->settings['allowed_html'])) {
       return;
     }
-    $output = $this->t('Allowed HTML tags: @tags', array('@tags' => $allowed_html));
+    $output = $this->t('Allowed HTML tags: @tags', ['@tags' => $allowed_html]);
     if (!$long) {
       return $output;
     }
@@ -350,117 +350,117 @@ public function tips($long = FALSE) {
     }
 
     $output .= '<p>' . $this->t('This site allows HTML content. While learning all of HTML may feel intimidating, learning how to use a very small number of the most basic HTML "tags" is very easy. This table provides examples for each tag that is enabled on this site.') . '</p>';
-    $output .= '<p>' . $this->t('For more information see W3C\'s <a href=":html-specifications">HTML Specifications</a> or use your favorite search engine to find other sites that explain HTML.', array(':html-specifications' => 'http://www.w3.org/TR/html/')) . '</p>';
-    $tips = array(
-      'a' => array($this->t('Anchors are used to make links to other pages.'), '<a href="' . $base_url . '">' . Html::escape(\Drupal::config('system.site')->get('name')) . '</a>'),
-      'br' => array($this->t('By default line break tags are automatically added, so use this tag to add additional ones. Use of this tag is different because it is not used with an open/close pair like all the others. Use the extra " /" inside the tag to maintain XHTML 1.0 compatibility'), $this->t('Text with <br />line break')),
-      'p' => array($this->t('By default paragraph tags are automatically added, so use this tag to add additional ones.'), '<p>' . $this->t('Paragraph one.') . '</p> <p>' . $this->t('Paragraph two.') . '</p>'),
-      'strong' => array($this->t('Strong', array(), array('context' => 'Font weight')), '<strong>' . $this->t('Strong', array(), array('context' => 'Font weight')) . '</strong>'),
-      'em' => array($this->t('Emphasized'), '<em>' . $this->t('Emphasized') . '</em>'),
-      'cite' => array($this->t('Cited'), '<cite>' . $this->t('Cited') . '</cite>'),
-      'code' => array($this->t('Coded text used to show programming source code'), '<code>' . $this->t('Coded') . '</code>'),
-      'b' => array($this->t('Bolded'), '<b>' . $this->t('Bolded') . '</b>'),
-      'u' => array($this->t('Underlined'), '<u>' . $this->t('Underlined') . '</u>'),
-      'i' => array($this->t('Italicized'), '<i>' . $this->t('Italicized') . '</i>'),
-      'sup' => array($this->t('Superscripted'), $this->t('<sup>Super</sup>scripted')),
-      'sub' => array($this->t('Subscripted'), $this->t('<sub>Sub</sub>scripted')),
-      'pre' => array($this->t('Preformatted'), '<pre>' . $this->t('Preformatted') . '</pre>'),
-      'abbr' => array($this->t('Abbreviation'), $this->t('<abbr title="Abbreviation">Abbrev.</abbr>')),
-      'acronym' => array($this->t('Acronym'), $this->t('<acronym title="Three-Letter Acronym">TLA</acronym>')),
-      'blockquote' => array($this->t('Block quoted'), '<blockquote>' . $this->t('Block quoted') . '</blockquote>'),
-      'q' => array($this->t('Quoted inline'), '<q>' . $this->t('Quoted inline') . '</q>'),
+    $output .= '<p>' . $this->t('For more information see W3C\'s <a href=":html-specifications">HTML Specifications</a> or use your favorite search engine to find other sites that explain HTML.', [':html-specifications' => 'http://www.w3.org/TR/html/']) . '</p>';
+    $tips = [
+      'a' => [$this->t('Anchors are used to make links to other pages.'), '<a href="' . $base_url . '">' . Html::escape(\Drupal::config('system.site')->get('name')) . '</a>'],
+      'br' => [$this->t('By default line break tags are automatically added, so use this tag to add additional ones. Use of this tag is different because it is not used with an open/close pair like all the others. Use the extra " /" inside the tag to maintain XHTML 1.0 compatibility'), $this->t('Text with <br />line break')],
+      'p' => [$this->t('By default paragraph tags are automatically added, so use this tag to add additional ones.'), '<p>' . $this->t('Paragraph one.') . '</p> <p>' . $this->t('Paragraph two.') . '</p>'],
+      'strong' => [$this->t('Strong', [], ['context' => 'Font weight']), '<strong>' . $this->t('Strong', [], ['context' => 'Font weight']) . '</strong>'],
+      'em' => [$this->t('Emphasized'), '<em>' . $this->t('Emphasized') . '</em>'],
+      'cite' => [$this->t('Cited'), '<cite>' . $this->t('Cited') . '</cite>'],
+      'code' => [$this->t('Coded text used to show programming source code'), '<code>' . $this->t('Coded') . '</code>'],
+      'b' => [$this->t('Bolded'), '<b>' . $this->t('Bolded') . '</b>'],
+      'u' => [$this->t('Underlined'), '<u>' . $this->t('Underlined') . '</u>'],
+      'i' => [$this->t('Italicized'), '<i>' . $this->t('Italicized') . '</i>'],
+      'sup' => [$this->t('Superscripted'), $this->t('<sup>Super</sup>scripted')],
+      'sub' => [$this->t('Subscripted'), $this->t('<sub>Sub</sub>scripted')],
+      'pre' => [$this->t('Preformatted'), '<pre>' . $this->t('Preformatted') . '</pre>'],
+      'abbr' => [$this->t('Abbreviation'), $this->t('<abbr title="Abbreviation">Abbrev.</abbr>')],
+      'acronym' => [$this->t('Acronym'), $this->t('<acronym title="Three-Letter Acronym">TLA</acronym>')],
+      'blockquote' => [$this->t('Block quoted'), '<blockquote>' . $this->t('Block quoted') . '</blockquote>'],
+      'q' => [$this->t('Quoted inline'), '<q>' . $this->t('Quoted inline') . '</q>'],
       // Assumes and describes tr, td, th.
-      'table' => array($this->t('Table'), '<table> <tr><th>' . $this->t('Table header') . '</th></tr> <tr><td>' . $this->t('Table cell') . '</td></tr> </table>'),
+      'table' => [$this->t('Table'), '<table> <tr><th>' . $this->t('Table header') . '</th></tr> <tr><td>' . $this->t('Table cell') . '</td></tr> </table>'],
       'tr' => NULL, 'td' => NULL, 'th' => NULL,
-      'del' => array($this->t('Deleted'), '<del>' . $this->t('Deleted') . '</del>'),
-      'ins' => array($this->t('Inserted'), '<ins>' . $this->t('Inserted') . '</ins>'),
+      'del' => [$this->t('Deleted'), '<del>' . $this->t('Deleted') . '</del>'],
+      'ins' => [$this->t('Inserted'), '<ins>' . $this->t('Inserted') . '</ins>'],
        // Assumes and describes li.
-      'ol' => array($this->t('Ordered list - use the &lt;li&gt; to begin each list item'), '<ol> <li>' . $this->t('First item') . '</li> <li>' . $this->t('Second item') . '</li> </ol>'),
-      'ul' => array($this->t('Unordered list - use the &lt;li&gt; to begin each list item'), '<ul> <li>' . $this->t('First item') . '</li> <li>' . $this->t('Second item') . '</li> </ul>'),
+      'ol' => [$this->t('Ordered list - use the &lt;li&gt; to begin each list item'), '<ol> <li>' . $this->t('First item') . '</li> <li>' . $this->t('Second item') . '</li> </ol>'],
+      'ul' => [$this->t('Unordered list - use the &lt;li&gt; to begin each list item'), '<ul> <li>' . $this->t('First item') . '</li> <li>' . $this->t('Second item') . '</li> </ul>'],
       'li' => NULL,
       // Assumes and describes dt and dd.
-      'dl' => array($this->t('Definition lists are similar to other HTML lists. &lt;dl&gt; begins the definition list, &lt;dt&gt; begins the definition term and &lt;dd&gt; begins the definition description.'), '<dl> <dt>' . $this->t('First term') . '</dt> <dd>' . $this->t('First definition') . '</dd> <dt>' . $this->t('Second term') . '</dt> <dd>' . $this->t('Second definition') . '</dd> </dl>'),
+      'dl' => [$this->t('Definition lists are similar to other HTML lists. &lt;dl&gt; begins the definition list, &lt;dt&gt; begins the definition term and &lt;dd&gt; begins the definition description.'), '<dl> <dt>' . $this->t('First term') . '</dt> <dd>' . $this->t('First definition') . '</dd> <dt>' . $this->t('Second term') . '</dt> <dd>' . $this->t('Second definition') . '</dd> </dl>'],
       'dt' => NULL, 'dd' => NULL,
-      'h1' => array($this->t('Heading'), '<h1>' . $this->t('Title') . '</h1>'),
-      'h2' => array($this->t('Heading'), '<h2>' . $this->t('Subtitle') . '</h2>'),
-      'h3' => array($this->t('Heading'), '<h3>' . $this->t('Subtitle three') . '</h3>'),
-      'h4' => array($this->t('Heading'), '<h4>' . $this->t('Subtitle four') . '</h4>'),
-      'h5' => array($this->t('Heading'), '<h5>' . $this->t('Subtitle five') . '</h5>'),
-      'h6' => array($this->t('Heading'), '<h6>' . $this->t('Subtitle six') . '</h6>')
-    );
-    $header = array($this->t('Tag Description'), $this->t('You Type'), $this->t('You Get'));
+      'h1' => [$this->t('Heading'), '<h1>' . $this->t('Title') . '</h1>'],
+      'h2' => [$this->t('Heading'), '<h2>' . $this->t('Subtitle') . '</h2>'],
+      'h3' => [$this->t('Heading'), '<h3>' . $this->t('Subtitle three') . '</h3>'],
+      'h4' => [$this->t('Heading'), '<h4>' . $this->t('Subtitle four') . '</h4>'],
+      'h5' => [$this->t('Heading'), '<h5>' . $this->t('Subtitle five') . '</h5>'],
+      'h6' => [$this->t('Heading'), '<h6>' . $this->t('Subtitle six') . '</h6>']
+    ];
+    $header = [$this->t('Tag Description'), $this->t('You Type'), $this->t('You Get')];
     preg_match_all('/<([a-z0-9]+)[^a-z0-9]/i', $allowed_html, $out);
     foreach ($out[1] as $tag) {
       if (!empty($tips[$tag])) {
-        $rows[] = array(
-          array('data' => $tips[$tag][0], 'class' => array('description')),
+        $rows[] = [
+          ['data' => $tips[$tag][0], 'class' => ['description']],
           // The markup must be escaped because this is the example code for the
           // user.
-          array('data' =>
-            array(
+          ['data' =>
+            [
               '#prefix' => '<code>',
               '#plain_text' => $tips[$tag][1],
               '#suffix' => '</code>'
-            ),
-            'class' => array('type')),
+            ],
+            'class' => ['type']],
           // The markup must not be escaped because this is the example output
           // for the user.
-          array('data' =>
-            array('#markup' => $tips[$tag][1]),
-            'class' => array('get'),
-          ),
-        );
+          ['data' =>
+            ['#markup' => $tips[$tag][1]],
+            'class' => ['get'],
+          ],
+        ];
       }
       else {
-        $rows[] = array(
-          array('data' => $this->t('No help provided for tag %tag.', array('%tag' => $tag)), 'class' => array('description'), 'colspan' => 3),
-        );
+        $rows[] = [
+          ['data' => $this->t('No help provided for tag %tag.', ['%tag' => $tag]), 'class' => ['description'], 'colspan' => 3],
+        ];
       }
     }
-    $table = array(
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
-    );
+    ];
     $output .= drupal_render($table);
 
     $output .= '<p>' . $this->t('Most unusual characters can be directly entered without any problems.') . '</p>';
-    $output .= '<p>' . $this->t('If you do encounter problems, try using HTML character entities. A common example looks like &amp;amp; for an ampersand &amp; character. For a full list of entities see HTML\'s <a href=":html-entities">entities</a> page. Some of the available characters include:', array(':html-entities' => 'http://www.w3.org/TR/html4/sgml/entities.html')) . '</p>';
+    $output .= '<p>' . $this->t('If you do encounter problems, try using HTML character entities. A common example looks like &amp;amp; for an ampersand &amp; character. For a full list of entities see HTML\'s <a href=":html-entities">entities</a> page. Some of the available characters include:', [':html-entities' => 'http://www.w3.org/TR/html4/sgml/entities.html']) . '</p>';
 
-    $entities = array(
-      array($this->t('Ampersand'), '&amp;'),
-      array($this->t('Greater than'), '&gt;'),
-      array($this->t('Less than'), '&lt;'),
-      array($this->t('Quotation mark'), '&quot;'),
-    );
-    $header = array($this->t('Character Description'), $this->t('You Type'), $this->t('You Get'));
+    $entities = [
+      [$this->t('Ampersand'), '&amp;'],
+      [$this->t('Greater than'), '&gt;'],
+      [$this->t('Less than'), '&lt;'],
+      [$this->t('Quotation mark'), '&quot;'],
+    ];
+    $header = [$this->t('Character Description'), $this->t('You Type'), $this->t('You Get')];
     unset($rows);
     foreach ($entities as $entity) {
-      $rows[] = array(
-        array('data' => $entity[0], 'class' => array('description')),
+      $rows[] = [
+        ['data' => $entity[0], 'class' => ['description']],
         // The markup must be escaped because this is the example code for the
         // user.
-        array(
-          'data' => array(
+        [
+          'data' => [
             '#prefix' => '<code>',
             '#plain_text' => $entity[1],
             '#suffix' => '</code>',
-          ),
-          'class' => array('type'),
-        ),
+          ],
+          'class' => ['type'],
+        ],
         // The markup must not be escaped because this is the example output
         // for the user.
-        array(
-          'data' => array('#markup' => $entity[1]),
-          'class' => array('get'),
-        ),
-      );
+        [
+          'data' => ['#markup' => $entity[1]],
+          'class' => ['get'],
+        ],
+      ];
     }
-    $table = array(
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
-    );
+    ];
     $output .= drupal_render($table);
     return $output;
   }
diff --git a/core/modules/filter/src/Plugin/Filter/FilterHtmlEscape.php b/core/modules/filter/src/Plugin/Filter/FilterHtmlEscape.php
index 24a37417ab9c2df8cf96c93e328cc6f7bb5febff..a99945f5cc7b7688c2d5b83b73b7f20612894130 100644
--- a/core/modules/filter/src/Plugin/Filter/FilterHtmlEscape.php
+++ b/core/modules/filter/src/Plugin/Filter/FilterHtmlEscape.php
@@ -29,7 +29,7 @@ public function process($text, $langcode) {
    */
   public function getHTMLRestrictions() {
     // Nothing is allowed.
-    return array('allowed' => array());
+    return ['allowed' => []];
   }
 
   /**
diff --git a/core/modules/filter/src/Plugin/Filter/FilterNull.php b/core/modules/filter/src/Plugin/Filter/FilterNull.php
index 032a6e040d6e4352092ee1e17ea9d7e805bf3654..afac124bdfe5046d2ec3b0e96949898669c93485 100644
--- a/core/modules/filter/src/Plugin/Filter/FilterNull.php
+++ b/core/modules/filter/src/Plugin/Filter/FilterNull.php
@@ -35,7 +35,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
     // Once per filter, log that a filter plugin was missing.
     if (!$this->logged) {
       $this->logged = TRUE;
-      \Drupal::logger('filter')->alert('Missing filter plugin: %filter.', array('%filter' => $plugin_id));
+      \Drupal::logger('filter')->alert('Missing filter plugin: %filter.', ['%filter' => $plugin_id]);
     }
     parent::__construct($configuration, $plugin_id, $plugin_definition);
   }
@@ -52,7 +52,7 @@ public function process($text, $langcode) {
    */
   public function getHTMLRestrictions() {
     // Nothing is allowed.
-    return array('allowed' => array());
+    return ['allowed' => []];
   }
 
   /**
diff --git a/core/modules/filter/src/Plugin/Filter/FilterUrl.php b/core/modules/filter/src/Plugin/Filter/FilterUrl.php
index 97c226a3596dd826576e9bd6db47c542607192a1..d3d2c96b0e5df8f8be4f1d5aa1654af3863f09e5 100644
--- a/core/modules/filter/src/Plugin/Filter/FilterUrl.php
+++ b/core/modules/filter/src/Plugin/Filter/FilterUrl.php
@@ -24,14 +24,14 @@ class FilterUrl extends FilterBase {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $form['filter_url_length'] = array(
+    $form['filter_url_length'] = [
       '#type' => 'number',
       '#title' => $this->t('Maximum link text length'),
       '#default_value' => $this->settings['filter_url_length'],
       '#min' => 1,
       '#field_suffix' => $this->t('characters'),
       '#description' => $this->t('URLs longer than this number of characters will be truncated to prevent long strings that break formatting. The link itself will be retained; just the text portion of the link will be truncated.'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/filter/src/Plugin/FilterBase.php b/core/modules/filter/src/Plugin/FilterBase.php
index 6f7f5e344d829e5c1691a5ac19efb986846bba49..11e385f27ad2483e00016295ffa64f2c99306b27 100644
--- a/core/modules/filter/src/Plugin/FilterBase.php
+++ b/core/modules/filter/src/Plugin/FilterBase.php
@@ -41,7 +41,7 @@ abstract class FilterBase extends PluginBase implements FilterInterface {
    *
    * @var array
    */
-  public $settings = array();
+  public $settings = [];
 
   /**
    * {@inheritdoc}
@@ -74,32 +74,32 @@ public function setConfiguration(array $configuration) {
    * {@inheritdoc}
    */
   public function getConfiguration() {
-    return array(
+    return [
       'id' => $this->getPluginId(),
       'provider' => $this->pluginDefinition['provider'],
       'status' => $this->status,
       'weight' => $this->weight,
       'settings' => $this->settings,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'provider' => $this->pluginDefinition['provider'],
       'status' => FALSE,
       'weight' => $this->pluginDefinition['weight'] ?: 0,
       'settings' => $this->pluginDefinition['settings'],
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    return array();
+    return [];
   }
 
   /**
@@ -130,7 +130,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
     // Implementations should work with and return $form. Returning an empty
     // array here allows the text format administration form to identify whether
     // the filter plugin has any settings form elements.
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/filter/src/Plugin/migrate/process/d6/FilterFormatPermission.php b/core/modules/filter/src/Plugin/migrate/process/d6/FilterFormatPermission.php
index d0e6143fa09ddbf83fbf11ed584fda875cda8b64..8c7a160167c23d22b70db79a2c5b15a67364c98a 100644
--- a/core/modules/filter/src/Plugin/migrate/process/d6/FilterFormatPermission.php
+++ b/core/modules/filter/src/Plugin/migrate/process/d6/FilterFormatPermission.php
@@ -45,7 +45,7 @@ public static function create(ContainerInterface $container, array $configuratio
       $plugin_id,
       $plugin_definition,
       $migration,
-      $container->get('plugin.manager.migrate.process')->createInstance('migration', array('migration' => 'd6_filter_format'), $migration)
+      $container->get('plugin.manager.migrate.process')->createInstance('migration', ['migration' => 'd6_filter_format'], $migration)
     );
   }
 
diff --git a/core/modules/filter/src/Plugin/migrate/source/d6/FilterFormat.php b/core/modules/filter/src/Plugin/migrate/source/d6/FilterFormat.php
index 0932773561d8975b044a1fb5022827e79a0e23f4..54b33d48dc74ad1640d463495e4df78b459b93b1 100644
--- a/core/modules/filter/src/Plugin/migrate/source/d6/FilterFormat.php
+++ b/core/modules/filter/src/Plugin/migrate/source/d6/FilterFormat.php
@@ -25,37 +25,37 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'format' => $this->t('Format ID.'),
       'name' => $this->t('The name of the format.'),
       'cache' => $this->t('Whether the format is cacheable.'),
       'roles' => $this->t('The role IDs which can use the format.'),
       'filters' => $this->t('The filters configured for the format.'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function prepareRow(Row $row) {
-    $filters = array();
+    $filters = [];
     $roles = $row->getSourceProperty('roles');
     $row->setSourceProperty('roles', array_values(array_filter(explode(',', $roles))));
     $format = $row->getSourceProperty('format');
     // Find filters for this row.
     $results = $this->select('filters', 'f')
-      ->fields('f', array('module', 'delta', 'weight'))
+      ->fields('f', ['module', 'delta', 'weight'])
       ->condition('format', $format)
       ->execute();
     foreach ($results as $raw_filter) {
       $module = $raw_filter['module'];
       $delta = $raw_filter['delta'];
-      $filter = array(
+      $filter = [
         'module' => $module,
         'delta' => $delta,
         'weight' => $raw_filter['weight'],
-        'settings' => array(),
-      );
+        'settings' => [],
+      ];
       // Load the filter settings for the filter module, modules can use
       // hook_migration_d6_filter_formats_prepare_row() to add theirs.
       if ($raw_filter['module'] == 'filter') {
diff --git a/core/modules/filter/src/Plugin/migrate/source/d7/FilterFormat.php b/core/modules/filter/src/Plugin/migrate/source/d7/FilterFormat.php
index c166dcded80822ede4e0b87b578c016685242f9a..55c28111000a43af180765d8a6c01c3544475802 100644
--- a/core/modules/filter/src/Plugin/migrate/source/d7/FilterFormat.php
+++ b/core/modules/filter/src/Plugin/migrate/source/d7/FilterFormat.php
@@ -25,14 +25,14 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'format' => $this->t('Format ID.'),
       'name' => $this->t('The name of the format.'),
       'cache' => $this->t('Whether the format is cacheable.'),
       'status' => $this->t('The status of the format'),
       'weight' => $this->t('The weight of the format'),
       'filters' => $this->t('The filters configured for the format.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/filter/src/Tests/FilterAdminTest.php b/core/modules/filter/src/Tests/FilterAdminTest.php
index 830cf18d77619ebc0e2041022178d3d5bfea04bc..b967101ec1fc168f1de5181c777cb1c53634ee8c 100644
--- a/core/modules/filter/src/Tests/FilterAdminTest.php
+++ b/core/modules/filter/src/Tests/FilterAdminTest.php
@@ -42,67 +42,67 @@ class FilterAdminTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     // Set up the filter formats used by this test.
-    $basic_html_format = FilterFormat::create(array(
+    $basic_html_format = FilterFormat::create([
       'format' => 'basic_html',
       'name' => 'Basic HTML',
-      'filters' => array(
-        'filter_html' => array(
+      'filters' => [
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<p> <br> <strong> <a> <em>',
-          ),
-        ),
-      ),
-    ));
+          ],
+        ],
+      ],
+    ]);
     $basic_html_format->save();
-    $restricted_html_format = FilterFormat::create(array(
+    $restricted_html_format = FilterFormat::create([
       'format' => 'restricted_html',
       'name' => 'Restricted HTML',
-      'filters' => array(
-        'filter_html' => array(
+      'filters' => [
+        'filter_html' => [
           'status' => TRUE,
           'weight' => -10,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<p> <br> <strong> <a> <em> <h4>',
-          ),
-        ),
-        'filter_autop' => array(
+          ],
+        ],
+        'filter_autop' => [
           'status' => TRUE,
           'weight' => 0,
-        ),
-        'filter_url' => array(
+        ],
+        'filter_url' => [
           'status' => TRUE,
           'weight' => 0,
-        ),
-        'filter_htmlcorrector' => array(
+        ],
+        'filter_htmlcorrector' => [
           'status' => TRUE,
           'weight' => 10,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $restricted_html_format->save();
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
       'weight' => 1,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $full_html_format->save();
 
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer filters',
       $basic_html_format->getPermissionName(),
       $restricted_html_format->getPermissionName(),
       $full_html_format->getPermissionName(),
       'access site reports',
-    ));
+    ]);
 
-    $this->webUser = $this->drupalCreateUser(array('create page content', 'edit own page content'));
-    user_role_grant_permissions('authenticated', array($basic_html_format->getPermissionName()));
-    user_role_grant_permissions('anonymous', array($restricted_html_format->getPermissionName()));
+    $this->webUser = $this->drupalCreateUser(['create page content', 'edit own page content']);
+    user_role_grant_permissions('authenticated', [$basic_html_format->getPermissionName()]);
+    user_role_grant_permissions('anonymous', [$restricted_html_format->getPermissionName()]);
     $this->drupalLogin($this->adminUser);
     $this->drupalPlaceBlock('local_actions_block');
   }
@@ -116,10 +116,10 @@ function testFormatAdmin() {
     $this->clickLink('Add text format');
     $format_id = Unicode::strtolower($this->randomMachineName());
     $name = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'format' => $format_id,
       'name' => $name,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
 
     // Verify default weight of the text format.
@@ -127,9 +127,9 @@ function testFormatAdmin() {
     $this->assertFieldByName("formats[$format_id][weight]", 0, 'Text format weight was saved.');
 
     // Change the weight of the text format.
-    $edit = array(
+    $edit = [
       "formats[$format_id][weight]" => 5,
-    );
+    ];
     $this->drupalPostForm('admin/config/content/formats', $edit, t('Save'));
     $this->assertFieldByName("formats[$format_id][weight]", 5, 'Text format weight was saved.');
 
@@ -139,14 +139,14 @@ function testFormatAdmin() {
     // and 'admin/config/content/formats/manage/' . $format_id . '/disable'
     // exists.
     // @todo: See https://www.drupal.org/node/2031223 for the above.
-    $edit_link = $this->xpath('//a[@href=:href]', array(
+    $edit_link = $this->xpath('//a[@href=:href]', [
       ':href' => \Drupal::url('entity.filter_format.edit_form', ['filter_format' => $format_id])
-    ));
+    ]);
     $this->assertTrue($edit_link, format_string('Link href %href found.',
-      array('%href' => 'admin/config/content/formats/manage/' . $format_id)
+      ['%href' => 'admin/config/content/formats/manage/' . $format_id]
     ));
     $this->drupalGet('admin/config/content/formats/manage/' . $format_id);
-    $this->drupalPostForm(NULL, array(), t('Save configuration'));
+    $this->drupalPostForm(NULL, [], t('Save configuration'));
 
     // Verify that the custom weight of the text format has been retained.
     $this->drupalGet('admin/config/content/formats');
@@ -155,7 +155,7 @@ function testFormatAdmin() {
     // Disable text format.
     $this->assertLinkByHref('admin/config/content/formats/manage/' . $format_id . '/disable');
     $this->drupalGet('admin/config/content/formats/manage/' . $format_id . '/disable');
-    $this->drupalPostForm(NULL, array(), t('Disable'));
+    $this->drupalPostForm(NULL, [], t('Disable'));
 
     // Verify that disabled text format no longer exists.
     $this->drupalGet('admin/config/content/formats/manage/' . $format_id);
@@ -163,23 +163,23 @@ function testFormatAdmin() {
 
     // Attempt to create a format of the same machine name as the disabled
     // format but with a different human readable name.
-    $edit = array(
+    $edit = [
       'format' => $format_id,
       'name' => 'New format',
-    );
+    ];
     $this->drupalPostForm('admin/config/content/formats/add', $edit, t('Save configuration'));
     $this->assertText('The machine-readable name is already in use. It must be unique.');
 
     // Attempt to create a format of the same human readable name as the
     // disabled format but with a different machine name.
-    $edit = array(
+    $edit = [
       'format' => 'new_format',
       'name' => $name,
-    );
+    ];
     $this->drupalPostForm('admin/config/content/formats/add', $edit, t('Save configuration'));
-    $this->assertRaw(t('Text format names must be unique. A format named %name already exists.', array(
+    $this->assertRaw(t('Text format names must be unique. A format named %name already exists.', [
       '%name' => $name,
-    )));
+    ]));
   }
 
   /**
@@ -207,21 +207,21 @@ function testFilterAdmin() {
     $this->assertFalse($full_format->access('use', $this->webUser), 'Web user may not use Full HTML.');
 
     // Add an additional tag and extra spaces and returns.
-    $edit = array();
+    $edit = [];
     $edit['filters[filter_html][settings][allowed_html]'] = "<a>   <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd>\r\n<quote>";
     $this->drupalPostForm('admin/config/content/formats/manage/' . $restricted, $edit, t('Save configuration'));
     $this->assertUrl('admin/config/content/formats');
     $this->drupalGet('admin/config/content/formats/manage/' . $restricted);
     $this->assertFieldByName('filters[filter_html][settings][allowed_html]', "<a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <quote>", 'Allowed HTML tag added.');
 
-    $elements = $this->xpath('//select[@name=:first]/following::select[@name=:second]', array(
+    $elements = $this->xpath('//select[@name=:first]/following::select[@name=:second]', [
       ':first' => 'filters[' . $first_filter . '][weight]',
       ':second' => 'filters[' . $second_filter . '][weight]',
-    ));
+    ]);
     $this->assertTrue(!empty($elements), 'Order confirmed in admin interface.');
 
     // Reorder filters.
-    $edit = array();
+    $edit = [];
     $edit['filters[' . $second_filter . '][weight]'] = 1;
     $edit['filters[' . $first_filter . '][weight]'] = 2;
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
@@ -230,10 +230,10 @@ function testFilterAdmin() {
     $this->assertFieldByName('filters[' . $second_filter . '][weight]', 1, 'Order saved successfully.');
     $this->assertFieldByName('filters[' . $first_filter . '][weight]', 2, 'Order saved successfully.');
 
-    $elements = $this->xpath('//select[@name=:first]/following::select[@name=:second]', array(
+    $elements = $this->xpath('//select[@name=:first]/following::select[@name=:second]', [
       ':first' => 'filters[' . $second_filter . '][weight]',
       ':second' => 'filters[' . $first_filter . '][weight]',
-    ));
+    ]);
     $this->assertTrue(!empty($elements), 'Reorder confirmed in admin interface.');
 
     $filter_format = FilterFormat::load($restricted);
@@ -246,7 +246,7 @@ function testFilterAdmin() {
     $this->assertEqual($filter_format->filters($second_filter)->weight + 1, $filter_format->filters($first_filter)->weight, 'Order confirmed in configuration.');
 
     // Add format.
-    $edit = array();
+    $edit = [];
     $edit['format'] = Unicode::strtolower($this->randomMachineName());
     $edit['name'] = $this->randomMachineName();
     $edit['roles[' . RoleInterface::AUTHENTICATED_ID . ']'] = 1;
@@ -254,7 +254,7 @@ function testFilterAdmin() {
     $edit['filters[' . $first_filter . '][status]'] = TRUE;
     $this->drupalPostForm('admin/config/content/formats/add', $edit, t('Save configuration'));
     $this->assertUrl('admin/config/content/formats');
-    $this->assertRaw(t('Added text format %format.', array('%format' => $edit['name'])), 'New filter created.');
+    $this->assertRaw(t('Added text format %format.', ['%format' => $edit['name']]), 'New filter created.');
 
     filter_formats_reset();
     $format = FilterFormat::load($edit['format']);
@@ -265,18 +265,18 @@ function testFilterAdmin() {
     $this->assertFieldByName('filters[' . $first_filter . '][status]', '', 'URL filter found.');
 
     // Disable new filter.
-    $this->drupalPostForm('admin/config/content/formats/manage/' . $format->id() . '/disable', array(), t('Disable'));
+    $this->drupalPostForm('admin/config/content/formats/manage/' . $format->id() . '/disable', [], t('Disable'));
     $this->assertUrl('admin/config/content/formats');
-    $this->assertRaw(t('Disabled text format %format.', array('%format' => $edit['name'])), 'Format successfully disabled.');
+    $this->assertRaw(t('Disabled text format %format.', ['%format' => $edit['name']]), 'Format successfully disabled.');
 
     // Allow authenticated users on full HTML.
     $format = FilterFormat::load($full);
-    $edit = array();
+    $edit = [];
     $edit['roles[' . RoleInterface::ANONYMOUS_ID . ']'] = 0;
     $edit['roles[' . RoleInterface::AUTHENTICATED_ID . ']'] = 1;
     $this->drupalPostForm('admin/config/content/formats/manage/' . $full, $edit, t('Save configuration'));
     $this->assertUrl('admin/config/content/formats');
-    $this->assertRaw(t('The text format %format has been updated.', array('%format' => $format->label())), 'Full HTML format successfully updated.');
+    $this->assertRaw(t('The text format %format has been updated.', ['%format' => $format->label()]), 'Full HTML format successfully updated.');
 
     // Switch user.
     $this->drupalLogin($this->webUser);
@@ -289,15 +289,15 @@ function testFilterAdmin() {
     $extra_text = 'text';
     $text = $body . '<random>' . $extra_text . '</random>';
 
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $edit['body[0][value]'] = $text;
     $edit['body[0][format]'] = $basic;
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
-    $this->assertText(t('Basic page @title has been created.', array('@title' => $edit['title[0][value]'])), 'Filtered node created.');
+    $this->assertText(t('Basic page @title has been created.', ['@title' => $edit['title[0][value]']]), 'Filtered node created.');
 
     // Verify that the creation message contains a link to a node.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'node/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'node/']);
     $this->assert(isset($view_link), 'The message area contains a link to a node');
 
     $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
@@ -312,7 +312,7 @@ function testFilterAdmin() {
     $this->config('filter.settings')
       ->set('always_show_fallback_choice', TRUE)
       ->save();
-    $edit = array();
+    $edit = [];
     $edit['body[0][format]'] = $plain;
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
     $this->drupalGet('node/' . $node->id());
@@ -326,7 +326,7 @@ function testFilterAdmin() {
 
     // Clean up.
     // Allowed tags.
-    $edit = array();
+    $edit = [];
     $edit['filters[filter_html][settings][allowed_html]'] = '<a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd>';
     $this->drupalPostForm('admin/config/content/formats/manage/' . $basic, $edit, t('Save configuration'));
     $this->assertUrl('admin/config/content/formats');
@@ -334,16 +334,16 @@ function testFilterAdmin() {
     $this->assertFieldByName('filters[filter_html][settings][allowed_html]', $edit['filters[filter_html][settings][allowed_html]'], 'Changes reverted.');
 
     // Full HTML.
-    $edit = array();
+    $edit = [];
     $edit['roles[' . RoleInterface::AUTHENTICATED_ID . ']'] = FALSE;
     $this->drupalPostForm('admin/config/content/formats/manage/' . $full, $edit, t('Save configuration'));
     $this->assertUrl('admin/config/content/formats');
-    $this->assertRaw(t('The text format %format has been updated.', array('%format' => $format->label())), 'Full HTML format successfully reverted.');
+    $this->assertRaw(t('The text format %format has been updated.', ['%format' => $format->label()]), 'Full HTML format successfully reverted.');
     $this->drupalGet('admin/config/content/formats/manage/' . $full);
     $this->assertFieldByName('roles[' . RoleInterface::AUTHENTICATED_ID . ']', $edit['roles[' . RoleInterface::AUTHENTICATED_ID . ']'], 'Changes reverted.');
 
     // Filter order.
-    $edit = array();
+    $edit = [];
     $edit['filters[' . $second_filter . '][weight]'] = 2;
     $edit['filters[' . $first_filter . '][weight]'] = 1;
     $this->drupalPostForm('admin/config/content/formats/manage/' . $basic, $edit, t('Save configuration'));
@@ -358,11 +358,11 @@ function testFilterAdmin() {
    */
   function testUrlFilterAdmin() {
     // The form does not save with an invalid filter URL length.
-    $edit = array(
+    $edit = [
       'filters[filter_url][settings][filter_url_length]' => $this->randomMachineName(4),
-    );
+    ];
     $this->drupalPostForm('admin/config/content/formats/manage/basic_html', $edit, t('Save configuration'));
-    $this->assertNoRaw(t('The text format %format has been updated.', array('%format' => 'Basic HTML')));
+    $this->assertNoRaw(t('The text format %format has been updated.', ['%format' => 'Basic HTML']));
   }
 
   /**
diff --git a/core/modules/filter/src/Tests/FilterFormTest.php b/core/modules/filter/src/Tests/FilterFormTest.php
index 24bbc158aebe77f811ffe001cf48cc77fab75552..9d0641e41bd7ee018b311507f5febcc1ddb22ba7 100644
--- a/core/modules/filter/src/Tests/FilterFormTest.php
+++ b/core/modules/filter/src/Tests/FilterFormTest.php
@@ -18,7 +18,7 @@ class FilterFormTest extends WebTestBase {
    *
    * @var array
    */
-  protected static $modules = array('filter', 'filter_test');
+  protected static $modules = ['filter', 'filter_test'];
 
   /**
    * An administrative user account that can administer text formats.
@@ -48,17 +48,17 @@ protected function setUp() {
     $full_html_format = FilterFormat::load('full_html');
 
     // Create users.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer filters',
       $filtered_html_format->getPermissionName(),
       $full_html_format->getPermissionName(),
       $filter_test_format->getPermissionName(),
-    ));
+    ]);
 
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       $filtered_html_format->getPermissionName(),
       $filter_test_format->getPermissionName(),
-    ));
+    ]);
   }
 
   /**
@@ -83,7 +83,7 @@ protected function doFilterFormTestAsAdmin() {
     $this->drupalGet('filter-test/text-format');
 
     // Test a text format element with all formats.
-    $formats = array('filtered_html', 'full_html', 'filter_test');
+    $formats = ['filtered_html', 'full_html', 'filter_test'];
     $this->assertEnabledTextarea('edit-all-formats-no-default-value');
     // If no default is given, the format with the lowest weight becomes the
     // default.
@@ -98,7 +98,7 @@ protected function doFilterFormTestAsAdmin() {
     $this->assertRequiredSelectAndOptions('edit-all-formats-default-missing-format--2', $formats);
 
     // Test a text format element with a predefined list of formats.
-    $formats = array('full_html', 'filter_test');
+    $formats = ['full_html', 'filter_test'];
     $this->assertEnabledTextarea('edit-restricted-formats-no-default-value');
     $this->assertOptions('edit-restricted-formats-no-default-format--2', $formats, 'full_html');
     $this->assertEnabledTextarea('edit-restricted-formats-default-value');
@@ -109,7 +109,7 @@ protected function doFilterFormTestAsAdmin() {
     $this->assertRequiredSelectAndOptions('edit-restricted-formats-default-disallowed-format--2', $formats);
 
     // Test a text format element with a fixed format.
-    $formats = array('filter_test');
+    $formats = ['filter_test'];
     // When there is only a single option there is no point in choosing.
     $this->assertEnabledTextarea('edit-single-format-no-default-value');
     $this->assertNoSelect('edit-single-format-no-default-format--2');
@@ -132,7 +132,7 @@ protected function doFilterFormTestAsNonAdmin() {
 
     // Test a text format element with all formats. Only formats the user has
     // access to are shown.
-    $formats = array('filtered_html', 'filter_test');
+    $formats = ['filtered_html', 'filter_test'];
     $this->assertEnabledTextarea('edit-all-formats-no-default-value');
     // If no default is given, the format with the lowest weight becomes the
     // default. This happens to be 'filtered_html'.
@@ -178,10 +178,10 @@ protected function doFilterFormTestAsNonAdmin() {
    *   TRUE if the assertion passed; FALSE otherwise.
    */
   protected function assertNoSelect($id) {
-    $select = $this->xpath('//select[@id=:id]', array(':id' => $id));
-    return $this->assertFalse($select, SafeMarkup::format('Field @id does not exist.', array(
+    $select = $this->xpath('//select[@id=:id]', [':id' => $id]);
+    return $this->assertFalse($select, SafeMarkup::format('Field @id does not exist.', [
       '@id' => $id,
-    )));
+    ]));
   }
 
   /**
@@ -198,20 +198,20 @@ protected function assertNoSelect($id) {
    *   TRUE if the assertion passed; FALSE otherwise.
    */
   protected function assertOptions($id, array $expected_options, $selected) {
-    $select = $this->xpath('//select[@id=:id]', array(':id' => $id));
+    $select = $this->xpath('//select[@id=:id]', [':id' => $id]);
     $select = reset($select);
-    $passed = $this->assertTrue($select instanceof \SimpleXMLElement, SafeMarkup::format('Field @id exists.', array(
+    $passed = $this->assertTrue($select instanceof \SimpleXMLElement, SafeMarkup::format('Field @id exists.', [
       '@id' => $id,
-    )));
+    ]));
 
     $found_options = $this->getAllOptions($select);
     foreach ($found_options as $found_key => $found_option) {
       $expected_key = array_search($found_option->attributes()->value, $expected_options);
       if ($expected_key !== FALSE) {
-        $this->pass(SafeMarkup::format('Option @option for field @id exists.', array(
+        $this->pass(SafeMarkup::format('Option @option for field @id exists.', [
           '@option' => $expected_options[$expected_key],
           '@id' => $id,
-        )));
+        ]));
         unset($found_options[$found_key]);
         unset($expected_options[$expected_key]);
       }
@@ -220,17 +220,17 @@ protected function assertOptions($id, array $expected_options, $selected) {
     // Make sure that all expected options were found and that there are no
     // unexpected options.
     foreach ($expected_options as $expected_option) {
-      $this->fail(SafeMarkup::format('Option @option for field @id exists.', array(
+      $this->fail(SafeMarkup::format('Option @option for field @id exists.', [
         '@option' => $expected_option,
         '@id' => $id,
-      )));
+      ]));
       $passed = FALSE;
     }
     foreach ($found_options as $found_option) {
-      $this->fail(SafeMarkup::format('Option @option for field @id does not exist.', array(
+      $this->fail(SafeMarkup::format('Option @option for field @id does not exist.', [
         '@option' => $found_option->attributes()->value,
         '@id' => $id,
-      )));
+      ]));
       $passed = FALSE;
     }
 
@@ -250,13 +250,13 @@ protected function assertOptions($id, array $expected_options, $selected) {
    *   TRUE if the assertion passed; FALSE otherwise.
    */
   protected function assertRequiredSelectAndOptions($id, array $options) {
-    $select = $this->xpath('//select[@id=:id and contains(@required, "required")]', array(
+    $select = $this->xpath('//select[@id=:id and contains(@required, "required")]', [
       ':id' => $id,
-    ));
+    ]);
     $select = reset($select);
-    $passed = $this->assertTrue($select instanceof \SimpleXMLElement, SafeMarkup::format('Required field @id exists.', array(
+    $passed = $this->assertTrue($select instanceof \SimpleXMLElement, SafeMarkup::format('Required field @id exists.', [
       '@id' => $id,
-    )));
+    ]));
     // A required select element has a "- Select -" option whose key is an empty
     // string.
     $options[] = '';
@@ -273,13 +273,13 @@ protected function assertRequiredSelectAndOptions($id, array $options) {
    *   TRUE if the assertion passed; FALSE otherwise.
    */
   protected function assertEnabledTextarea($id) {
-    $textarea = $this->xpath('//textarea[@id=:id and not(contains(@disabled, "disabled"))]', array(
+    $textarea = $this->xpath('//textarea[@id=:id and not(contains(@disabled, "disabled"))]', [
       ':id' => $id,
-    ));
+    ]);
     $textarea = reset($textarea);
-    return $this->assertTrue($textarea instanceof \SimpleXMLElement, SafeMarkup::format('Enabled field @id exists.', array(
+    return $this->assertTrue($textarea instanceof \SimpleXMLElement, SafeMarkup::format('Enabled field @id exists.', [
       '@id' => $id,
-    )));
+    ]));
   }
 
   /**
@@ -292,17 +292,17 @@ protected function assertEnabledTextarea($id) {
    *   TRUE if the assertion passed; FALSE otherwise.
    */
   protected function assertDisabledTextarea($id) {
-    $textarea = $this->xpath('//textarea[@id=:id and contains(@disabled, "disabled")]', array(
+    $textarea = $this->xpath('//textarea[@id=:id and contains(@disabled, "disabled")]', [
       ':id' => $id,
-    ));
+    ]);
     $textarea = reset($textarea);
-    $passed = $this->assertTrue($textarea instanceof \SimpleXMLElement, SafeMarkup::format('Disabled field @id exists.', array(
+    $passed = $this->assertTrue($textarea instanceof \SimpleXMLElement, SafeMarkup::format('Disabled field @id exists.', [
       '@id' => $id,
-    )));
+    ]));
     $expected = 'This field has been disabled because you do not have sufficient permissions to edit it.';
-    $passed = $passed && $this->assertEqual((string) $textarea, $expected, SafeMarkup::format('Disabled textarea @id hides text in an inaccessible text format.', array(
+    $passed = $passed && $this->assertEqual((string) $textarea, $expected, SafeMarkup::format('Disabled textarea @id hides text in an inaccessible text format.', [
       '@id' => $id,
-    )));
+    ]));
     // Make sure the text format select is not shown.
     $select_id = str_replace('value', 'format--2', $id);
     return $passed && $this->assertNoSelect($select_id);
diff --git a/core/modules/filter/src/Tests/FilterFormatAccessTest.php b/core/modules/filter/src/Tests/FilterFormatAccessTest.php
index 5f204046dcc3f0c1390bff6caabaa5e082bbcd12..c306585b44901edab10e15ac98e6210f634d6f2a 100644
--- a/core/modules/filter/src/Tests/FilterFormatAccessTest.php
+++ b/core/modules/filter/src/Tests/FilterFormatAccessTest.php
@@ -69,25 +69,25 @@ protected function setUp() {
 
     $this->drupalPlaceBlock('page_title_block');
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     // Create a user who can administer text formats, but does not have
     // specific permission to use any of them.
-    $this->filterAdminUser = $this->drupalCreateUser(array(
+    $this->filterAdminUser = $this->drupalCreateUser([
       'administer filters',
       'create page content',
       'edit any page content',
-    ));
+    ]);
 
     // Create three text formats. Two text formats are created for all users so
     // that the drop-down list appears for all tests.
     $this->drupalLogin($this->filterAdminUser);
-    $formats = array();
+    $formats = [];
     for ($i = 0; $i < 3; $i++) {
-      $edit = array(
+      $edit = [
         'format' => Unicode::strtolower($this->randomMachineName()),
         'name' => $this->randomMachineName(),
-      );
+      ];
       $this->drupalPostForm('admin/config/content/formats/add', $edit, t('Save configuration'));
       $this->resetFilterCaches();
       $formats[] = FilterFormat::load($edit['format']);
@@ -96,22 +96,22 @@ protected function setUp() {
     $this->drupalLogout();
 
     // Create a regular user with access to two of the formats.
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'create page content',
       'edit any page content',
       $this->allowedFormat->getPermissionName(),
       $this->secondAllowedFormat->getPermissionName(),
-    ));
+    ]);
 
     // Create an administrative user who has access to use all three formats.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer filters',
       'create page content',
       'edit any page content',
       $this->allowedFormat->getPermissionName(),
       $this->secondAllowedFormat->getPermissionName(),
       $this->disallowedFormat->getPermissionName(),
-    ));
+    ]);
     $this->drupalPlaceBlock('local_tasks_block');
   }
 
@@ -145,11 +145,11 @@ function testFormatPermissions() {
     // the disallowed format does not.
     $this->drupalLogin($this->webUser);
     $this->drupalGet('node/add/page');
-    $elements = $this->xpath('//select[@name=:name]/option', array(
+    $elements = $this->xpath('//select[@name=:name]/option', [
       ':name' => 'body[0][format]',
       ':option' => $this->allowedFormat->id(),
-    ));
-    $options = array();
+    ]);
+    $options = [];
     foreach ($elements as $element) {
       $options[(string) $element['value']] = $element;
     }
@@ -218,7 +218,7 @@ function testFormatWidgetPermissions() {
 
     // Create node to edit.
     $this->drupalLogin($this->adminUser);
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit[$body_value_key] = $this->randomMachineName(16);
     $edit[$body_format_key] = $this->disallowedFormat->id();
@@ -234,7 +234,7 @@ function testFormatWidgetPermissions() {
     $this->assertFieldByXPath("//textarea[@name='$body_value_key' and @disabled='disabled']", t('This field has been disabled because you do not have sufficient permissions to edit it.'), 'Text format access denied message found.');
 
     // Verify that title can be changed, but preview displays original body.
-    $new_edit = array();
+    $new_edit = [];
     $new_edit['title[0][value]'] = $this->randomMachineName(8);
     $this->drupalPostForm(NULL, $new_edit, t('Preview'));
     $this->assertText($edit[$body_value_key], 'Old body found in preview.');
@@ -276,10 +276,10 @@ function testFormatWidgetPermissions() {
     // produces an error message, and does not result in the node being saved.
     $old_title = $new_edit['title[0][value]'];
     $new_title = $this->randomMachineName(8);
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $new_title;
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
-    $this->assertText(t('@name field is required.', array('@name' => t('Text format'))), 'Error message is displayed.');
+    $this->assertText(t('@name field is required.', ['@name' => t('Text format')]), 'Error message is displayed.');
     $this->drupalGet('node/' . $node->id());
     $this->assertText($old_title, 'Old title found.');
     $this->assertNoText($new_title, 'New title not found.');
@@ -294,7 +294,7 @@ function testFormatWidgetPermissions() {
     // Switch the text format to a new one, then disable that format and all
     // other formats on the site (leaving only the fallback format).
     $this->drupalLogin($this->adminUser);
-    $edit = array($body_format_key => $this->allowedFormat->id());
+    $edit = [$body_format_key => $this->allowedFormat->id()];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
     $this->assertUrl('node/' . $node->id());
     foreach (filter_formats() as $format) {
@@ -311,10 +311,10 @@ function testFormatWidgetPermissions() {
     $this->drupalLogin($this->filterAdminUser);
     $old_title = $new_title;
     $new_title = $this->randomMachineName(8);
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $new_title;
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
-    $this->assertText(t('@name field is required.', array('@name' => t('Text format'))), 'Error message is displayed.');
+    $this->assertText(t('@name field is required.', ['@name' => t('Text format')]), 'Error message is displayed.');
     $this->drupalGet('node/' . $node->id());
     $this->assertText($old_title, 'Old title found.');
     $this->assertNoText($new_title, 'New title not found.');
diff --git a/core/modules/filter/src/Tests/FilterHtmlImageSecureTest.php b/core/modules/filter/src/Tests/FilterHtmlImageSecureTest.php
index 5ce4e6d6b849cc42eafd9891fa2567eb8ba5b1ee..5cbdbb0b728d87759e54f09a6e26ab2579c10e1b 100644
--- a/core/modules/filter/src/Tests/FilterHtmlImageSecureTest.php
+++ b/core/modules/filter/src/Tests/FilterHtmlImageSecureTest.php
@@ -21,7 +21,7 @@ class FilterHtmlImageSecureTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'node', 'comment');
+  public static $modules = ['filter', 'node', 'comment'];
 
   /**
    * An authenticated user.
@@ -34,38 +34,38 @@ protected function setUp() {
     parent::setUp();
 
     // Setup Filtered HTML text format.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
-      'filters' => array(
-        'filter_html' => array(
+      'filters' => [
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<img src testattribute> <a>',
-          ),
-        ),
-        'filter_autop' => array(
+          ],
+        ],
+        'filter_autop' => [
           'status' => 1,
-        ),
-        'filter_html_image_secure' => array(
+        ],
+        'filter_html_image_secure' => [
           'status' => 1,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $filtered_html_format->save();
 
     // Setup users.
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'access content',
       'access comments',
       'post comments',
       'skip comment approval',
       $filtered_html_format->getPermissionName(),
-    ));
+    ]);
     $this->drupalLogin($this->webUser);
 
     // Setup a node to comment and test on.
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
     // Add a comment field.
     $this->addDefaultCommentField('node', 'page');
     $this->node = $this->drupalCreateNode();
@@ -104,7 +104,7 @@ function testImageSource() {
     // expected filter conversions.
     $host = \Drupal::request()->getHost();
     $host_pattern = '|^http\://' . $host . '(\:[0-9]{0,5})|';
-    $images = array(
+    $images = [
       $http_base_url . '/' . $druplicon => base_path() . $druplicon,
       $https_base_url . '/' . $druplicon => base_path() . $druplicon,
       // Test a url that includes a port.
@@ -123,8 +123,8 @@ function testImageSource() {
       'https://example.com/' . $druplicon => $red_x_image,
       'javascript:druplicon.png' => $red_x_image,
       $csrf_path . '/logout' => $red_x_image,
-    );
-    $comment = array();
+    ];
+    $comment = [];
     foreach ($images as $image => $converted) {
       // Output the image source as plain text for debugging.
       $comment[] = $image . ':';
@@ -132,9 +132,9 @@ function testImageSource() {
       // contain characters that confuse XPath.
       $comment[] = '<img src="' . $image . '" testattribute="' . hash('sha256', $image) . '" />';
     }
-    $edit = array(
+    $edit = [
       'comment_body[0][value]' => implode("\n", $comment),
-    );
+    ];
     $this->drupalPostForm('node/' . $this->node->id(), $edit, t('Save'));
     foreach ($images as $image => $converted) {
       $found = FALSE;
@@ -151,7 +151,7 @@ function testImageSource() {
           $this->assertEqual((string) $element['src'], $converted);
         }
       }
-      $this->assertTrue($found, format_string('@image was found.', array('@image' => $image)));
+      $this->assertTrue($found, format_string('@image was found.', ['@image' => $image]));
     }
   }
 
diff --git a/core/modules/filter/tests/filter_test/src/Form/FilterTestFormatForm.php b/core/modules/filter/tests/filter_test/src/Form/FilterTestFormatForm.php
index 7f4ad57e8cfc24fc71b3b579b7ca05f280a6fc53..a5049a1635edc8561401d1727f6040e11b760fe3 100644
--- a/core/modules/filter/tests/filter_test/src/Form/FilterTestFormatForm.php
+++ b/core/modules/filter/tests/filter_test/src/Form/FilterTestFormatForm.php
@@ -25,80 +25,80 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // form elements.
     $form['#tree'] = TRUE;
 
-    $form['all_formats'] = array(
+    $form['all_formats'] = [
       '#type' => 'details',
       '#title' => 'All text formats',
-    );
-    $form['all_formats']['no_default'] = array(
+    ];
+    $form['all_formats']['no_default'] = [
       '#type' => 'text_format',
       '#title' => 'No default value',
-    );
-    $form['all_formats']['default'] = array(
+    ];
+    $form['all_formats']['default'] = [
       '#type' => 'text_format',
       '#title' => 'Default value',
       '#format' => 'filter_test',
-    );
-    $form['all_formats']['default_missing'] = array(
+    ];
+    $form['all_formats']['default_missing'] = [
       '#type' => 'text_format',
       '#title' => 'Missing default value',
       '#format' => 'missing_format',
-    );
+    ];
 
-    $form['restricted_formats'] = array(
+    $form['restricted_formats'] = [
       '#type' => 'details',
       '#title' => 'Restricted text format list',
-    );
-    $form['restricted_formats']['no_default'] = array(
+    ];
+    $form['restricted_formats']['no_default'] = [
       '#type' => 'text_format',
       '#title' => 'No default value',
-      '#allowed_formats' => array('full_html', 'filter_test'),
-    );
-    $form['restricted_formats']['default'] = array(
+      '#allowed_formats' => ['full_html', 'filter_test'],
+    ];
+    $form['restricted_formats']['default'] = [
       '#type' => 'text_format',
       '#title' => 'Default value',
       '#format' => 'full_html',
-      '#allowed_formats' => array('full_html', 'filter_test'),
-    );
-    $form['restricted_formats']['default_missing'] = array(
+      '#allowed_formats' => ['full_html', 'filter_test'],
+    ];
+    $form['restricted_formats']['default_missing'] = [
       '#type' => 'text_format',
       '#title' => 'Missing default value',
       '#format' => 'missing_format',
-      '#allowed_formats' => array('full_html', 'filter_test'),
-    );
-    $form['restricted_formats']['default_disallowed'] = array(
+      '#allowed_formats' => ['full_html', 'filter_test'],
+    ];
+    $form['restricted_formats']['default_disallowed'] = [
       '#type' => 'text_format',
       '#title' => 'Disallowed default value',
       '#format' => 'filtered_html',
-      '#allowed_formats' => array('full_html', 'filter_test'),
-    );
+      '#allowed_formats' => ['full_html', 'filter_test'],
+    ];
 
-    $form['single_format'] = array(
+    $form['single_format'] = [
       '#type' => 'details',
       '#title' => 'Single text format',
-    );
-    $form['single_format']['no_default'] = array(
+    ];
+    $form['single_format']['no_default'] = [
       '#type' => 'text_format',
       '#title' => 'No default value',
-      '#allowed_formats' => array('filter_test'),
-    );
-    $form['single_format']['default'] = array(
+      '#allowed_formats' => ['filter_test'],
+    ];
+    $form['single_format']['default'] = [
       '#type' => 'text_format',
       '#title' => 'Default value',
       '#format' => 'filter_test',
-      '#allowed_formats' => array('filter_test'),
-    );
-    $form['single_format']['default_missing'] = array(
+      '#allowed_formats' => ['filter_test'],
+    ];
+    $form['single_format']['default_missing'] = [
       '#type' => 'text_format',
       '#title' => 'Missing default value',
       '#format' => 'missing_format',
-      '#allowed_formats' => array('filter_test'),
-    );
-    $form['single_format']['default_disallowed'] = array(
+      '#allowed_formats' => ['filter_test'],
+    ];
+    $form['single_format']['default_disallowed'] = [
       '#type' => 'text_format',
       '#title' => 'Disallowed default value',
       '#format' => 'full_html',
-      '#allowed_formats' => array('filter_test'),
-    );
+      '#allowed_formats' => ['filter_test'],
+    ];
 
     return $form;
   }
diff --git a/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestAssets.php b/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestAssets.php
index 700dec39a97664ecacbcc8ec2a3e88e0a1117574..5f63a06b0a0fc0c910d8e8083bd67c19d7621a19 100644
--- a/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestAssets.php
+++ b/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestAssets.php
@@ -22,11 +22,11 @@ class FilterTestAssets extends FilterBase {
    */
   public function process($text, $langcode) {
     $result = new FilterProcessResult($text);
-    $result->addAttachments(array(
-      'library' => array(
+    $result->addAttachments([
+      'library' => [
         'filter/caption',
-      ),
-    ));
+      ],
+    ]);
     return $result;
   }
 
diff --git a/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestCacheTags.php b/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestCacheTags.php
index fe1986c94b303e99a444897ca892a35b2694798b..4b305053fb712e4c9c5aecd461cc9adcbea00101 100644
--- a/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestCacheTags.php
+++ b/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestCacheTags.php
@@ -22,8 +22,8 @@ class FilterTestCacheTags extends FilterBase {
    */
   public function process($text, $langcode) {
     $result = new FilterProcessResult($text);
-    $result->addCacheTags(array('foo:bar'));
-    $result->addCacheTags(array('foo:baz'));
+    $result->addCacheTags(['foo:bar']);
+    $result->addCacheTags(['foo:baz']);
     return $result;
   }
 
diff --git a/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestPlaceholders.php b/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestPlaceholders.php
index 6b5e7241ac512a75c37a9299308005f7c6c6cc84..c6d03000f984087de6aa8a04107822379b052d68 100644
--- a/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestPlaceholders.php
+++ b/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestPlaceholders.php
@@ -38,7 +38,7 @@ public function process($text, $langcode) {
    */
   public static function renderDynamicThing($thing) {
     return [
-      '#markup' => format_string('This is a dynamic @thing.', array('@thing' => $thing)),
+      '#markup' => format_string('This is a dynamic @thing.', ['@thing' => $thing]),
     ];
   }
 
diff --git a/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestReplace.php b/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestReplace.php
index 0e6d85da5d49a74377df373d486a4d676cc6ad57..c697e250816f4abbb9afd1c57103801ec9240e0f 100644
--- a/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestReplace.php
+++ b/core/modules/filter/tests/filter_test/src/Plugin/Filter/FilterTestReplace.php
@@ -21,7 +21,7 @@ class FilterTestReplace extends FilterBase {
    * {@inheritdoc}
    */
   public function process($text, $langcode) {
-    $text = array();
+    $text = [];
     $text[] = 'Filter: ' . $this->getLabel() . ' (' . $this->getPluginId() . ')';
     $text[] = 'Language: ' . $langcode;
     return new FilterProcessResult(implode("<br />\n", $text));
diff --git a/core/modules/filter/tests/src/Functional/FilterDefaultFormatTest.php b/core/modules/filter/tests/src/Functional/FilterDefaultFormatTest.php
index 6014c10b3a41f0bf0a2085109dcdb3e0acff804e..4aee647f9626b1965c536ad48a52247f4ad22a0a 100644
--- a/core/modules/filter/tests/src/Functional/FilterDefaultFormatTest.php
+++ b/core/modules/filter/tests/src/Functional/FilterDefaultFormatTest.php
@@ -18,7 +18,7 @@ class FilterDefaultFormatTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter');
+  public static $modules = ['filter'];
 
   /**
    * Tests if the default text format is accessible to users.
@@ -26,26 +26,26 @@ class FilterDefaultFormatTest extends BrowserTestBase {
   function testDefaultTextFormats() {
     // Create two text formats, and two users. The first user has access to
     // both formats, but the second user only has access to the second one.
-    $admin_user = $this->drupalCreateUser(array('administer filters'));
+    $admin_user = $this->drupalCreateUser(['administer filters']);
     $this->drupalLogin($admin_user);
-    $formats = array();
+    $formats = [];
     for ($i = 0; $i < 2; $i++) {
-      $edit = array(
+      $edit = [
         'format' => Unicode::strtolower($this->randomMachineName()),
         'name' => $this->randomMachineName(),
-      );
+      ];
       $this->drupalPostForm('admin/config/content/formats/add', $edit, t('Save configuration'));
       $this->resetFilterCaches();
       $formats[] = FilterFormat::load($edit['format']);
     }
     list($first_format, $second_format) = $formats;
     $second_format_permission = $second_format->getPermissionName();
-    $first_user = $this->drupalCreateUser(array($first_format->getPermissionName(), $second_format_permission));
-    $second_user = $this->drupalCreateUser(array($second_format_permission));
+    $first_user = $this->drupalCreateUser([$first_format->getPermissionName(), $second_format_permission]);
+    $second_user = $this->drupalCreateUser([$second_format_permission]);
 
     // Adjust the weights so that the first and second formats (in that order)
     // are the two lowest weighted formats available to any user.
-    $edit = array();
+    $edit = [];
     $edit['formats[' . $first_format->id() . '][weight]'] = -2;
     $edit['formats[' . $second_format->id() . '][weight]'] = -1;
     $this->drupalPostForm('admin/config/content/formats', $edit, t('Save'));
@@ -62,7 +62,7 @@ function testDefaultTextFormats() {
 
     // Reorder the two formats, and check that both users now have the same
     // default.
-    $edit = array();
+    $edit = [];
     $edit['formats[' . $second_format->id() . '][weight]'] = -3;
     $this->drupalPostForm('admin/config/content/formats', $edit, t('Save'));
     $this->resetFilterCaches();
diff --git a/core/modules/filter/tests/src/Functional/FilterHooksTest.php b/core/modules/filter/tests/src/Functional/FilterHooksTest.php
index c499f235ec4f15b8d9fcb15f657436afa46927b0..2ff3e4301e995b87dbd0ad8f310903976106e71d 100644
--- a/core/modules/filter/tests/src/Functional/FilterHooksTest.php
+++ b/core/modules/filter/tests/src/Functional/FilterHooksTest.php
@@ -18,7 +18,7 @@ class FilterHooksTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'filter_test');
+  public static $modules = ['node', 'filter_test'];
 
   /**
    * Tests hooks on format management.
@@ -29,43 +29,43 @@ class FilterHooksTest extends BrowserTestBase {
   function testFilterHooks() {
     // Create content type, with underscores.
     $type_name = 'test_' . strtolower($this->randomMachineName());
-    $type = $this->drupalCreateContentType(array('name' => $type_name, 'type' => $type_name));
+    $type = $this->drupalCreateContentType(['name' => $type_name, 'type' => $type_name]);
     $node_permission = "create $type_name content";
 
-    $admin_user = $this->drupalCreateUser(array('administer filters', 'administer nodes', $node_permission));
+    $admin_user = $this->drupalCreateUser(['administer filters', 'administer nodes', $node_permission]);
     $this->drupalLogin($admin_user);
 
     // Add a text format.
     $name = $this->randomMachineName();
-    $edit = array();
+    $edit = [];
     $edit['format'] = Unicode::strtolower($this->randomMachineName());
     $edit['name'] = $name;
     $edit['roles[' . RoleInterface::ANONYMOUS_ID . ']'] = 1;
     $this->drupalPostForm('admin/config/content/formats/add', $edit, t('Save configuration'));
-    $this->assertRaw(t('Added text format %format.', array('%format' => $name)));
+    $this->assertRaw(t('Added text format %format.', ['%format' => $name]));
     $this->assertText('hook_filter_format_insert invoked.');
 
     $format_id = $edit['format'];
 
     // Update text format.
-    $edit = array();
+    $edit = [];
     $edit['roles[' . RoleInterface::AUTHENTICATED_ID . ']'] = 1;
     $this->drupalPostForm('admin/config/content/formats/manage/' . $format_id, $edit, t('Save configuration'));
-    $this->assertRaw(t('The text format %format has been updated.', array('%format' => $name)));
+    $this->assertRaw(t('The text format %format has been updated.', ['%format' => $name]));
     $this->assertText('hook_filter_format_update invoked.');
 
     // Use the format created.
     $title = $this->randomMachineName(8);
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $title;
     $edit['body[0][value]'] = $this->randomMachineName(32);
     $edit['body[0][format]'] = $format_id;
     $this->drupalPostForm("node/add/{$type->id()}", $edit, t('Save and publish'));
-    $this->assertText(t('@type @title has been created.', array('@type' => $type_name, '@title' => $title)));
+    $this->assertText(t('@type @title has been created.', ['@type' => $type_name, '@title' => $title]));
 
     // Disable the text format.
-    $this->drupalPostForm('admin/config/content/formats/manage/' . $format_id . '/disable', array(), t('Disable'));
-    $this->assertRaw(t('Disabled text format %format.', array('%format' => $name)));
+    $this->drupalPostForm('admin/config/content/formats/manage/' . $format_id . '/disable', [], t('Disable'));
+    $this->assertRaw(t('Disabled text format %format.', ['%format' => $name]));
     $this->assertText('hook_filter_format_disable invoked.');
   }
 
diff --git a/core/modules/filter/tests/src/Functional/FilterNoFormatTest.php b/core/modules/filter/tests/src/Functional/FilterNoFormatTest.php
index 1139947c71096832af3e0be0cd6b353108df42eb..22b3ac65b0a1cd3f7efdf418976364a696d59e78 100644
--- a/core/modules/filter/tests/src/Functional/FilterNoFormatTest.php
+++ b/core/modules/filter/tests/src/Functional/FilterNoFormatTest.php
@@ -16,7 +16,7 @@ class FilterNoFormatTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter');
+  public static $modules = ['filter'];
 
   /**
    * Tests text without format.
diff --git a/core/modules/filter/tests/src/Functional/FilterSecurityTest.php b/core/modules/filter/tests/src/Functional/FilterSecurityTest.php
index 4055159f607036733d68f332fd4e7f70d23b1af4..af1240e772a44149a38cf2b336e4d7ce95bccce1 100644
--- a/core/modules/filter/tests/src/Functional/FilterSecurityTest.php
+++ b/core/modules/filter/tests/src/Functional/FilterSecurityTest.php
@@ -21,7 +21,7 @@ class FilterSecurityTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'filter_test');
+  public static $modules = ['node', 'filter_test'];
 
   /**
    * A user with administrative permissions.
@@ -34,14 +34,14 @@ protected function setUp() {
     parent::setUp();
 
     // Create Basic page node type.
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     /** @var \Drupal\filter\Entity\FilterFormat $filtered_html_format */
     $filtered_html_format = FilterFormat::load('filtered_html');
     $filtered_html_permission = $filtered_html_format->getPermissionName();
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array($filtered_html_permission));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, [$filtered_html_permission]);
 
-    $this->adminUser = $this->drupalCreateUser(array('administer modules', 'administer filters', 'administer site configuration'));
+    $this->adminUser = $this->drupalCreateUser(['administer modules', 'administer filters', 'administer site configuration']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -53,16 +53,16 @@ protected function setUp() {
    */
   function testDisableFilterModule() {
     // Create a new node.
-    $node = $this->drupalCreateNode(array('promote' => 1));
+    $node = $this->drupalCreateNode(['promote' => 1]);
     $body_raw = $node->body->value;
     $format_id = $node->body->format;
     $this->drupalGet('node/' . $node->id());
     $this->assertText($body_raw, 'Node body found.');
 
     // Enable the filter_test_replace filter.
-    $edit = array(
+    $edit = [
       'filters[filter_test_replace][status]' => 1,
-    );
+    ];
     $this->drupalPostForm('admin/config/content/formats/manage/' . $format_id, $edit, t('Save configuration'));
 
     // Verify that filter_test_replace filter replaced the content.
@@ -71,7 +71,7 @@ function testDisableFilterModule() {
     $this->assertText('Filter: Testing filter', 'Testing filter output found.');
 
     // Disable the text format entirely.
-    $this->drupalPostForm('admin/config/content/formats/manage/' . $format_id . '/disable', array(), t('Disable'));
+    $this->drupalPostForm('admin/config/content/formats/manage/' . $format_id . '/disable', [], t('Disable'));
 
     // Verify that the content is empty, because the text format does not exist.
     $this->drupalGet('node/' . $node->id());
@@ -84,8 +84,8 @@ function testDisableFilterModule() {
   function testSkipSecurityFilters() {
     $text = "Text with some disallowed tags: <script />, <p><object>unicorn</object></p>, <i><table></i>.";
     $expected_filtered_text = "Text with some disallowed tags: , <p>unicorn</p>, .";
-    $this->assertEqual(check_markup($text, 'filtered_html', '', array()), $expected_filtered_text, 'Expected filter result.');
-    $this->assertEqual(check_markup($text, 'filtered_html', '', array(FilterInterface::TYPE_HTML_RESTRICTOR)), $expected_filtered_text, 'Expected filter result, even when trying to disable filters of the FilterInterface::TYPE_HTML_RESTRICTOR type.');
+    $this->assertEqual(check_markup($text, 'filtered_html', '', []), $expected_filtered_text, 'Expected filter result.');
+    $this->assertEqual(check_markup($text, 'filtered_html', '', [FilterInterface::TYPE_HTML_RESTRICTOR]), $expected_filtered_text, 'Expected filter result, even when trying to disable filters of the FilterInterface::TYPE_HTML_RESTRICTOR type.');
   }
 
 }
diff --git a/core/modules/filter/tests/src/Kernel/FilterAPITest.php b/core/modules/filter/tests/src/Kernel/FilterAPITest.php
index 50189a6ab41d5650d592ef03186a601bbfb79e2f..85ea05edf6d5604f955495ae3308e82eeaa190ec 100644
--- a/core/modules/filter/tests/src/Kernel/FilterAPITest.php
+++ b/core/modules/filter/tests/src/Kernel/FilterAPITest.php
@@ -19,12 +19,12 @@
  */
 class FilterAPITest extends EntityKernelTestBase {
 
-  public static $modules = array('system', 'filter', 'filter_test', 'user');
+  public static $modules = ['system', 'filter', 'filter_test', 'user'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->installConfig(array('system', 'filter', 'filter_test'));
+    $this->installConfig(['system', 'filter', 'filter_test']);
   }
 
   /**
@@ -32,24 +32,24 @@ protected function setUp() {
    */
   function testCheckMarkupFilterOrder() {
     // Create crazy HTML format.
-    $crazy_format = FilterFormat::create(array(
+    $crazy_format = FilterFormat::create([
       'format' => 'crazy',
       'name' => 'Crazy',
       'weight' => 1,
-      'filters' => array(
-        'filter_html_escape' => array(
+      'filters' => [
+        'filter_html_escape' => [
           'weight' => 10,
           'status' => 1,
-        ),
-        'filter_html' => array(
+        ],
+        'filter_html' => [
           'weight' => -10,
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<p>',
-          ),
-        ),
-      )
-    ));
+          ],
+        ],
+      ]
+    ]);
     $crazy_format->save();
 
     $text = "<p>Llamas are <not> awesome!</p>";
@@ -66,14 +66,14 @@ function testCheckMarkupFilterSubset() {
     $expected_filtered_text = "Text with evil content and a URL: <a href=\"https://www.drupal.org\">https://www.drupal.org</a>!";
     $expected_filter_text_without_html_generators = "Text with evil content and a URL: https://www.drupal.org!";
 
-    $actual_filtered_text = check_markup($text, 'filtered_html', '', array());
+    $actual_filtered_text = check_markup($text, 'filtered_html', '', []);
     $this->verbose("Actual:<pre>$actual_filtered_text</pre>Expected:<pre>$expected_filtered_text</pre>");
     $this->assertEqual(
       $actual_filtered_text,
       $expected_filtered_text,
       'Expected filter result.'
     );
-    $actual_filtered_text_without_html_generators = check_markup($text, 'filtered_html', '', array(FilterInterface::TYPE_MARKUP_LANGUAGE));
+    $actual_filtered_text_without_html_generators = check_markup($text, 'filtered_html', '', [FilterInterface::TYPE_MARKUP_LANGUAGE]);
     $this->verbose("Actual:<pre>$actual_filtered_text_without_html_generators</pre>Expected:<pre>$expected_filter_text_without_html_generators</pre>");
     $this->assertEqual(
       $actual_filtered_text_without_html_generators,
@@ -84,7 +84,7 @@ function testCheckMarkupFilterSubset() {
     // this check focuses on the ability to filter multiple filter types at once.
     // Drupal core only ships with these two types of filters, so this is the
     // most extensive test possible.
-    $actual_filtered_text_without_html_generators = check_markup($text, 'filtered_html', '', array(FilterInterface::TYPE_HTML_RESTRICTOR, FilterInterface::TYPE_MARKUP_LANGUAGE));
+    $actual_filtered_text_without_html_generators = check_markup($text, 'filtered_html', '', [FilterInterface::TYPE_HTML_RESTRICTOR, FilterInterface::TYPE_MARKUP_LANGUAGE]);
     $this->verbose("Actual:<pre>$actual_filtered_text_without_html_generators</pre>Expected:<pre>$expected_filter_text_without_html_generators</pre>");
     $this->assertEqual(
       $actual_filtered_text_without_html_generators,
@@ -103,20 +103,20 @@ function testFilterFormatAPI() {
     $filtered_html_format = FilterFormat::load('filtered_html');
     $this->assertIdentical(
       $filtered_html_format->getHtmlRestrictions(),
-      array(
-        'allowed' => array(
+      [
+        'allowed' => [
           'p' => FALSE,
           'br' => FALSE,
           'strong' => FALSE,
-          'a' => array('href' => TRUE, 'hreflang' => TRUE),
-          '*' => array('style' => FALSE, 'on*' => FALSE, 'lang' => TRUE, 'dir' => array('ltr' => TRUE, 'rtl' => TRUE)),
-        ),
-      ),
+          'a' => ['href' => TRUE, 'hreflang' => TRUE],
+          '*' => ['style' => FALSE, 'on*' => FALSE, 'lang' => TRUE, 'dir' => ['ltr' => TRUE, 'rtl' => TRUE]],
+        ],
+      ],
       'FilterFormatInterface::getHtmlRestrictions() works as expected for the filtered_html format.'
     );
     $this->assertIdentical(
       $filtered_html_format->getFilterTypes(),
-      array(FilterInterface::TYPE_HTML_RESTRICTOR, FilterInterface::TYPE_MARKUP_LANGUAGE),
+      [FilterInterface::TYPE_HTML_RESTRICTOR, FilterInterface::TYPE_MARKUP_LANGUAGE],
       'FilterFormatInterface::getFilterTypes() works as expected for the filtered_html format.'
     );
 
@@ -129,113 +129,113 @@ function testFilterFormatAPI() {
     );
     $this->assertIdentical(
       $full_html_format->getFilterTypes(),
-      array(),
+      [],
       'FilterFormatInterface::getFilterTypes() works as expected for the full_html format.'
     );
 
     // Test on stupid_filtered_html, where nothing is allowed.
-    $stupid_filtered_html_format = FilterFormat::create(array(
+    $stupid_filtered_html_format = FilterFormat::create([
       'format' => 'stupid_filtered_html',
       'name' => 'Stupid Filtered HTML',
-      'filters' => array(
-        'filter_html' => array(
+      'filters' => [
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '', // Nothing is allowed.
-          ),
-        ),
-      ),
-    ));
+          ],
+        ],
+      ],
+    ]);
     $stupid_filtered_html_format->save();
     $this->assertIdentical(
       $stupid_filtered_html_format->getHtmlRestrictions(),
-      array('allowed' => array()), // No tag is allowed.
+      ['allowed' => []], // No tag is allowed.
       'FilterFormatInterface::getHtmlRestrictions() works as expected for the stupid_filtered_html format.'
     );
     $this->assertIdentical(
       $stupid_filtered_html_format->getFilterTypes(),
-      array(FilterInterface::TYPE_HTML_RESTRICTOR),
+      [FilterInterface::TYPE_HTML_RESTRICTOR],
       'FilterFormatInterface::getFilterTypes() works as expected for the stupid_filtered_html format.'
     );
 
     // Test on very_restricted_html, where there's two different filters of the
     // FilterInterface::TYPE_HTML_RESTRICTOR type, each restricting in different ways.
-    $very_restricted_html_format = FilterFormat::create(array(
+    $very_restricted_html_format = FilterFormat::create([
       'format' => 'very_restricted_html',
       'name' => 'Very Restricted HTML',
-      'filters' => array(
-        'filter_html' => array(
+      'filters' => [
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<p> <br> <a href> <strong>',
-          ),
-        ),
-        'filter_test_restrict_tags_and_attributes' => array(
+          ],
+        ],
+        'filter_test_restrict_tags_and_attributes' => [
           'status' => 1,
-          'settings' => array(
-            'restrictions' => array(
-              'allowed' => array(
+          'settings' => [
+            'restrictions' => [
+              'allowed' => [
                 'p' => TRUE,
                 'br' => FALSE,
-                'a' => array('href' => TRUE),
+                'a' => ['href' => TRUE],
                 'em' => TRUE,
-              ),
-            )
-          ),
-        ),
-      )
-    ));
+              ],
+            ]
+          ],
+        ],
+      ]
+    ]);
     $very_restricted_html_format->save();
     $this->assertIdentical(
       $very_restricted_html_format->getHtmlRestrictions(),
-      array(
-        'allowed' => array(
+      [
+        'allowed' => [
           'p' => FALSE,
           'br' => FALSE,
-          'a' => array('href' => TRUE),
-          '*' => array('style' => FALSE, 'on*' => FALSE, 'lang' => TRUE, 'dir' => array('ltr' => TRUE, 'rtl' => TRUE)),
-        ),
-      ),
+          'a' => ['href' => TRUE],
+          '*' => ['style' => FALSE, 'on*' => FALSE, 'lang' => TRUE, 'dir' => ['ltr' => TRUE, 'rtl' => TRUE]],
+        ],
+      ],
       'FilterFormatInterface::getHtmlRestrictions() works as expected for the very_restricted_html format.'
     );
     $this->assertIdentical(
       $very_restricted_html_format->getFilterTypes(),
-      array(FilterInterface::TYPE_HTML_RESTRICTOR),
+      [FilterInterface::TYPE_HTML_RESTRICTOR],
       'FilterFormatInterface::getFilterTypes() works as expected for the very_restricted_html format.'
     );
 
     // Test on nonsensical_restricted_html, where the allowed attribute values
     // contain asterisks, which do not have any meaning, but which we also
     // cannot prevent because configuration can be modified outside of forms.
-    $nonsensical_restricted_html = FilterFormat::create(array(
+    $nonsensical_restricted_html = FilterFormat::create([
       'format' => 'nonsensical_restricted_html',
       'name' => 'Nonsensical Restricted HTML',
-      'filters' => array(
-        'filter_html' => array(
+      'filters' => [
+        'filter_html' => [
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<a> <b class> <c class="*"> <d class="foo bar-* *">',
-          ),
-        ),
-      )
-    ));
+          ],
+        ],
+      ]
+    ]);
     $nonsensical_restricted_html->save();
     $this->assertIdentical(
       $nonsensical_restricted_html->getHtmlRestrictions(),
-      array(
-        'allowed' => array(
+      [
+        'allowed' => [
           'a' => FALSE,
-          'b' => array('class' => TRUE),
-          'c' => array('class' => TRUE),
-          'd' => array('class' => array('foo' => TRUE, 'bar-*' => TRUE)),
-          '*' => array('style' => FALSE, 'on*' => FALSE, 'lang' => TRUE, 'dir' => array('ltr' => TRUE, 'rtl' => TRUE)),
-        ),
-      ),
+          'b' => ['class' => TRUE],
+          'c' => ['class' => TRUE],
+          'd' => ['class' => ['foo' => TRUE, 'bar-*' => TRUE]],
+          '*' => ['style' => FALSE, 'on*' => FALSE, 'lang' => TRUE, 'dir' => ['ltr' => TRUE, 'rtl' => TRUE]],
+        ],
+      ],
       'FilterFormatInterface::getHtmlRestrictions() works as expected for the nonsensical_restricted_html format.'
     );
     $this->assertIdentical(
       $very_restricted_html_format->getFilterTypes(),
-      array(FilterInterface::TYPE_HTML_RESTRICTOR),
+      [FilterInterface::TYPE_HTML_RESTRICTOR],
       'FilterFormatInterface::getFilterTypes() works as expected for the very_restricted_html format.'
     );
   }
@@ -250,57 +250,57 @@ function testFilterFormatAPI() {
    * This test focuses solely on those advanced features.
    */
   function testProcessedTextElement() {
-    FilterFormat::create(array(
+    FilterFormat::create([
       'format' => 'element_test',
       'name' => 'processed_text element test format',
-      'filters' => array(
-        'filter_test_assets' => array(
+      'filters' => [
+        'filter_test_assets' => [
           'weight' => -1,
           'status' => TRUE,
-        ),
-        'filter_test_cache_tags' => array(
+        ],
+        'filter_test_cache_tags' => [
           'weight' => 0,
           'status' => TRUE,
-        ),
-        'filter_test_cache_contexts' => array(
+        ],
+        'filter_test_cache_contexts' => [
           'weight' => 0,
           'status' => TRUE,
-        ),
-        'filter_test_cache_merge' => array(
+        ],
+        'filter_test_cache_merge' => [
           'weight' => 0,
           'status' => TRUE,
-        ),
-        'filter_test_placeholders' => array(
+        ],
+        'filter_test_placeholders' => [
           'weight' => 1,
           'status' => TRUE,
-        ),
+        ],
         // Run the HTML corrector filter last, because it has the potential to
         // break the placeholders added by the filter_test_placeholders filter.
-        'filter_htmlcorrector' => array(
+        'filter_htmlcorrector' => [
           'weight' => 10,
           'status' => TRUE,
-        ),
-      ),
-    ))->save();
+        ],
+      ],
+    ])->save();
 
-    $build = array(
+    $build = [
       '#type' => 'processed_text',
       '#text' => '<p>Hello, world!</p>',
       '#format' => 'element_test',
-    );
+    ];
     drupal_render_root($build);
 
     // Verify the attachments and cacheability metadata.
-    $expected_attachments = array(
+    $expected_attachments = [
       // The assets attached by the filter_test_assets filter.
-      'library' => array(
+      'library' => [
         'filter/caption',
-      ),
+      ],
       // The placeholders attached that still need to be processed.
       'placeholders' => [],
-    );
+    ];
     $this->assertEqual($expected_attachments, $build['#attached'], 'Expected attachments present');
-    $expected_cache_tags = array(
+    $expected_cache_tags = [
       // The cache tag set by the processed_text element itself.
       'config:filter.format.element_test',
       // The cache tags set by the filter_test_cache_tags filter.
@@ -308,7 +308,7 @@ function testProcessedTextElement() {
       'foo:baz',
       // The cache tags set by the filter_test_cache_merge filter.
       'merge:tag',
-    );
+    ];
     $this->assertEqual($expected_cache_tags, $build['#cache']['tags'], 'Expected cache tags present.');
     $expected_cache_contexts = [
       // The cache context set by the filter_test_cache_contexts filter.
@@ -333,20 +333,20 @@ function testTypedDataAPI() {
 
     $this->assertTrue($data instanceof OptionsProviderInterface, 'Typed data object implements \Drupal\Core\TypedData\OptionsProviderInterface');
 
-    $filtered_html_user = $this->createUser(array('uid' => 2), array(
+    $filtered_html_user = $this->createUser(['uid' => 2], [
       FilterFormat::load('filtered_html')->getPermissionName(),
-    ));
+    ]);
 
     // Test with anonymous user.
     $user = new AnonymousUserSession();
     \Drupal::currentUser()->setAccount($user);
 
-    $expected_available_options = array(
+    $expected_available_options = [
       'filtered_html' => 'Filtered HTML',
       'full_html' => 'Full HTML',
       'filter_test' => 'Test format',
       'plain_text' => 'Plain text',
-    );
+    ];
 
     $available_values = $data->getPossibleValues();
     $this->assertEqual($available_values, array_keys($expected_available_options));
@@ -354,9 +354,9 @@ function testTypedDataAPI() {
     $this->assertEqual($available_options, $expected_available_options);
 
     $allowed_values = $data->getSettableValues($user);
-    $this->assertEqual($allowed_values, array('plain_text'));
+    $this->assertEqual($allowed_values, ['plain_text']);
     $allowed_options = $data->getSettableOptions($user);
-    $this->assertEqual($allowed_options, array('plain_text' => 'Plain text'));
+    $this->assertEqual($allowed_options, ['plain_text' => 'Plain text']);
 
     $data->setValue('foo');
     $violations = $data->validate();
@@ -383,12 +383,12 @@ function testTypedDataAPI() {
     $this->assertEqual(count($violations), 0, "No validation violation for accessible format 'filtered_html' found.");
 
     $allowed_values = $data->getSettableValues($filtered_html_user);
-    $this->assertEqual($allowed_values, array('filtered_html', 'plain_text'));
+    $this->assertEqual($allowed_values, ['filtered_html', 'plain_text']);
     $allowed_options = $data->getSettableOptions($filtered_html_user);
-    $expected_allowed_options = array(
+    $expected_allowed_options = [
       'filtered_html' => 'Filtered HTML',
       'plain_text' => 'Plain text',
-    );
+    ];
     $this->assertEqual($allowed_options, $expected_allowed_options);
   }
 
@@ -397,43 +397,43 @@ function testTypedDataAPI() {
    */
   public function testFilterFormatPreSave() {
     /** @var \Drupal\filter\FilterFormatInterface $crazy_format */
-    $crazy_format = FilterFormat::create(array(
+    $crazy_format = FilterFormat::create([
       'format' => 'crazy',
       'name' => 'Crazy',
       'weight' => 1,
-      'filters' => array(
-        'filter_html_escape' => array(
+      'filters' => [
+        'filter_html_escape' => [
           'weight' => 10,
           'status' => 1,
-        ),
-        'filter_html' => array(
+        ],
+        'filter_html' => [
           'weight' => -10,
           'status' => 1,
-          'settings' => array(
+          'settings' => [
             'allowed_html' => '<p>',
-          ),
-        ),
-      )
-    ));
+          ],
+        ],
+      ]
+    ]);
     $crazy_format->save();
     // Use config to directly load the configuration and check that only enabled
     // or customized plugins are saved to configuration.
     $filters = $this->config('filter.format.crazy')->get('filters');
-    $this->assertEqual(array('filter_html_escape', 'filter_html'), array_keys($filters));
+    $this->assertEqual(['filter_html_escape', 'filter_html'], array_keys($filters));
 
     // Disable a plugin to ensure that disabled plugins with custom settings are
     // stored in configuration.
-    $crazy_format->setFilterConfig('filter_html_escape', array('status' => FALSE));
+    $crazy_format->setFilterConfig('filter_html_escape', ['status' => FALSE]);
     $crazy_format->save();
     $filters = $this->config('filter.format.crazy')->get('filters');
-    $this->assertEqual(array('filter_html_escape', 'filter_html'), array_keys($filters));
+    $this->assertEqual(['filter_html_escape', 'filter_html'], array_keys($filters));
 
     // Set the settings as per default to ensure that disable plugins in this
     // state are not stored in configuration.
-    $crazy_format->setFilterConfig('filter_html_escape', array('weight' => -10));
+    $crazy_format->setFilterConfig('filter_html_escape', ['weight' => -10]);
     $crazy_format->save();
     $filters = $this->config('filter.format.crazy')->get('filters');
-    $this->assertEqual(array('filter_html'), array_keys($filters));
+    $this->assertEqual(['filter_html'], array_keys($filters));
   }
 
   /**
@@ -452,7 +452,7 @@ public function assertFilterFormatViolation(ConstraintViolationListInterface $vi
         break;
       }
     }
-    $this->assertTrue($filter_format_violation_found, format_string('Validation violation for invalid value "%invalid_value" found', array('%invalid_value' => $invalid_value)));
+    $this->assertTrue($filter_format_violation_found, format_string('Validation violation for invalid value "%invalid_value" found', ['%invalid_value' => $invalid_value]));
   }
 
   /**
@@ -467,7 +467,7 @@ public function assertFilterFormatViolation(ConstraintViolationListInterface $vi
    * @see filter_system_info_alter()
    */
   public function testDependencyRemoval() {
-    $this->installSchema('user', array('users_data'));
+    $this->installSchema('user', ['users_data']);
     $filter_format = FilterFormat::load('filtered_html');
 
     // Disable the filter_test_restrict_tags_and_attributes filter plugin but
@@ -493,7 +493,7 @@ public function testDependencyRemoval() {
     $this->assertEqual(['module' => ['filter_test']], $filter_format->getDependencies());
 
     // Uninstall the module.
-    \Drupal::service('module_installer')->uninstall(array('filter_test'));
+    \Drupal::service('module_installer')->uninstall(['filter_test']);
 
     // Verify the filter format still exists but the dependency and filter is
     // gone.
diff --git a/core/modules/filter/tests/src/Kernel/FilterCrudTest.php b/core/modules/filter/tests/src/Kernel/FilterCrudTest.php
index 0a9be1832695fc8bc54f9f4e9d5fee1152a86bc7..87ea076ad367df083aaaebb161e42b93292f7049 100644
--- a/core/modules/filter/tests/src/Kernel/FilterCrudTest.php
+++ b/core/modules/filter/tests/src/Kernel/FilterCrudTest.php
@@ -24,42 +24,42 @@ class FilterCrudTest extends KernelTestBase {
    */
   function testTextFormatCrud() {
     // Add a text format with minimum data only.
-    $format = FilterFormat::create(array(
+    $format = FilterFormat::create([
       'format' => 'empty_format',
       'name' => 'Empty format',
-    ));
+    ]);
     $format->save();
     $this->verifyTextFormat($format);
 
     // Add another text format specifying all possible properties.
-    $format = FilterFormat::create(array(
+    $format = FilterFormat::create([
       'format' => 'custom_format',
       'name' => 'Custom format',
-    ));
-    $format->setFilterConfig('filter_url', array(
+    ]);
+    $format->setFilterConfig('filter_url', [
       'status' => 1,
-      'settings' => array(
+      'settings' => [
         'filter_url_length' => 30,
-      ),
-    ));
+      ],
+    ]);
     $format->save();
     $this->verifyTextFormat($format);
 
     // Alter some text format properties and save again.
     $format->set('name', 'Altered format');
-    $format->setFilterConfig('filter_url', array(
+    $format->setFilterConfig('filter_url', [
       'status' => 0,
-    ));
-    $format->setFilterConfig('filter_autop', array(
+    ]);
+    $format->setFilterConfig('filter_autop', [
       'status' => 1,
-    ));
+    ]);
     $format->save();
     $this->verifyTextFormat($format);
 
     // Add a filter_test_replace  filter and save again.
-    $format->setFilterConfig('filter_test_replace', array(
+    $format->setFilterConfig('filter_test_replace', [
       'status' => 1,
-    ));
+    ]);
     $format->save();
     $this->verifyTextFormat($format);
 
@@ -89,7 +89,7 @@ public function testDisableFallbackFormat() {
    * Verifies that a text format is properly stored.
    */
   function verifyTextFormat($format) {
-    $t_args = array('%format' => $format->label());
+    $t_args = ['%format' => $format->label()];
     $default_langcode = \Drupal::languageManager()->getDefaultLanguage()->getId();
 
     // Verify the loaded filter has all properties.
diff --git a/core/modules/filter/tests/src/Kernel/FilterDefaultConfigTest.php b/core/modules/filter/tests/src/Kernel/FilterDefaultConfigTest.php
index b4ce50cec3146d9014f2d66aa62574cfba508ded..eb8106c52555c33b05727585f60b89dad06f2ff7 100644
--- a/core/modules/filter/tests/src/Kernel/FilterDefaultConfigTest.php
+++ b/core/modules/filter/tests/src/Kernel/FilterDefaultConfigTest.php
@@ -13,7 +13,7 @@
  */
 class FilterDefaultConfigTest extends KernelTestBase {
 
-  public static $modules = array('system', 'user', 'filter', 'filter_test');
+  public static $modules = ['system', 'user', 'filter', 'filter_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -24,7 +24,7 @@ protected function setUp() {
     $this->installEntitySchema('user');
 
     // Install filter_test module, which ships with custom default format.
-    $this->installConfig(array('user', 'filter_test'));
+    $this->installConfig(['user', 'filter_test']);
   }
 
   /**
@@ -44,27 +44,27 @@ function testInstallation() {
     // Verify that the loaded format does not contain any roles.
     $this->assertEqual($format->get('roles'), NULL);
     // Verify that the defined roles in the default config have been processed.
-    $this->assertEqual(array_keys(filter_get_roles_by_format($format)), array(
+    $this->assertEqual(array_keys(filter_get_roles_by_format($format)), [
       RoleInterface::ANONYMOUS_ID,
       RoleInterface::AUTHENTICATED_ID,
-    ));
+    ]);
 
     // Verify enabled filters.
     $filters = $format->get('filters');
     $this->assertEqual($filters['filter_html_escape']['status'], 1);
     $this->assertEqual($filters['filter_html_escape']['weight'], -10);
     $this->assertEqual($filters['filter_html_escape']['provider'], 'filter');
-    $this->assertEqual($filters['filter_html_escape']['settings'], array());
+    $this->assertEqual($filters['filter_html_escape']['settings'], []);
     $this->assertEqual($filters['filter_autop']['status'], 1);
     $this->assertEqual($filters['filter_autop']['weight'], 0);
     $this->assertEqual($filters['filter_autop']['provider'], 'filter');
-    $this->assertEqual($filters['filter_autop']['settings'], array());
+    $this->assertEqual($filters['filter_autop']['settings'], []);
     $this->assertEqual($filters['filter_url']['status'], 1);
     $this->assertEqual($filters['filter_url']['weight'], 0);
     $this->assertEqual($filters['filter_url']['provider'], 'filter');
-    $this->assertEqual($filters['filter_url']['settings'], array(
+    $this->assertEqual($filters['filter_url']['settings'], [
       'filter_url_length' => 72,
-    ));
+    ]);
   }
 
   /**
@@ -73,23 +73,23 @@ function testInstallation() {
   function testUpdateRoles() {
     // Verify role permissions declared in default config.
     $format = FilterFormat::load('filter_test');
-    $this->assertEqual(array_keys(filter_get_roles_by_format($format)), array(
+    $this->assertEqual(array_keys(filter_get_roles_by_format($format)), [
       RoleInterface::ANONYMOUS_ID,
       RoleInterface::AUTHENTICATED_ID,
-    ));
+    ]);
 
     // Attempt to change roles.
-    $format->set('roles', array(
+    $format->set('roles', [
       RoleInterface::AUTHENTICATED_ID,
-    ));
+    ]);
     $format->save();
 
     // Verify that roles have not been updated.
     $format = FilterFormat::load('filter_test');
-    $this->assertEqual(array_keys(filter_get_roles_by_format($format)), array(
+    $this->assertEqual(array_keys(filter_get_roles_by_format($format)), [
       RoleInterface::ANONYMOUS_ID,
       RoleInterface::AUTHENTICATED_ID,
-    ));
+    ]);
   }
 
 }
diff --git a/core/modules/filter/tests/src/Kernel/FilterKernelTest.php b/core/modules/filter/tests/src/Kernel/FilterKernelTest.php
index 06c1e4b53fd3662e5b9b67456baa4bbba639b6ee..bbac91615205be5379b44b2520b3d221ad3a92c5 100644
--- a/core/modules/filter/tests/src/Kernel/FilterKernelTest.php
+++ b/core/modules/filter/tests/src/Kernel/FilterKernelTest.php
@@ -22,7 +22,7 @@ class FilterKernelTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'filter');
+  public static $modules = ['system', 'filter'];
 
   /**
    * @var \Drupal\filter\Plugin\FilterInterface[]
@@ -31,10 +31,10 @@ class FilterKernelTest extends KernelTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
 
     $manager = $this->container->get('plugin.manager.filter');
-    $bag = new FilterPluginCollection($manager, array());
+    $bag = new FilterPluginCollection($manager, []);
     $this->filters = $bag->getAll();
   }
 
@@ -107,11 +107,11 @@ function testCaptionFilter() {
       });
     };
 
-    $attached_library = array(
-      'library' => array(
+    $attached_library = [
+      'library' => [
         'filter/caption',
-      ),
-    );
+      ],
+    ];
 
     // No data-caption attribute.
     $input = '<img src="llama.jpg" />';
@@ -190,13 +190,13 @@ function testCaptionFilter() {
     // want to make sure that it works well in tandem with the "Limit allowed
     // HTML tags" filter, which it is typically used with.
     $html_filter = $this->filters['filter_html'];
-    $html_filter->setConfiguration(array(
-      'settings' => array(
+    $html_filter->setConfiguration([
+      'settings' => [
         'allowed_html' => '<img src data-align data-caption>',
         'filter_html_help' => 1,
         'filter_html_nofollow' => 0,
-      )
-    ));
+      ]
+    ]);
     $test_with_html_filter = function ($input) use ($filter, $html_filter, $renderer) {
       return $renderer->executeInRenderContext(new RenderContext(), function () use ($input, $filter, $html_filter) {
         // 1. Apply HTML filter's processing step.
@@ -272,11 +272,11 @@ function testAlignAndCaptionFilters() {
       });
     };
 
-    $attached_library = array(
-      'library' => array(
+    $attached_library = [
+      'library' => [
         'filter/caption',
-      ),
-    );
+      ],
+    ];
 
     // Both data-caption and data-align attributes: all 3 allowed values for the
     // data-align attribute.
@@ -322,60 +322,60 @@ function testLineBreakFilter() {
     // Since the line break filter naturally needs plenty of newlines in test
     // strings and expectations, we're using "\n" instead of regular newlines
     // here.
-    $tests = array(
+    $tests = [
       // Single line breaks should be changed to <br /> tags, while paragraphs
       // separated with double line breaks should be enclosed with <p></p> tags.
-      "aaa\nbbb\n\nccc" => array(
+      "aaa\nbbb\n\nccc" => [
         "<p>aaa<br />\nbbb</p>\n<p>ccc</p>" => TRUE,
-      ),
+      ],
       // Skip contents of certain block tags entirely.
       "<script>aaa\nbbb\n\nccc</script>
 <style>aaa\nbbb\n\nccc</style>
 <pre>aaa\nbbb\n\nccc</pre>
 <object>aaa\nbbb\n\nccc</object>
 <iframe>aaa\nbbb\n\nccc</iframe>
-" => array(
+" => [
         "<script>aaa\nbbb\n\nccc</script>" => TRUE,
         "<style>aaa\nbbb\n\nccc</style>" => TRUE,
         "<pre>aaa\nbbb\n\nccc</pre>" => TRUE,
         "<object>aaa\nbbb\n\nccc</object>" => TRUE,
         "<iframe>aaa\nbbb\n\nccc</iframe>" => TRUE,
-      ),
+      ],
       // Skip comments entirely.
-      "One. <!-- comment --> Two.\n<!--\nThree.\n-->\n" => array(
+      "One. <!-- comment --> Two.\n<!--\nThree.\n-->\n" => [
         '<!-- comment -->' => TRUE,
         "<!--\nThree.\n-->" => TRUE,
-      ),
+      ],
       // Resulting HTML should produce matching paragraph tags.
-      '<p><div>  </div></p>' => array(
+      '<p><div>  </div></p>' => [
         "<p>\n<div>  </div>\n</p>" => TRUE,
-      ),
-      '<div><p>  </p></div>' => array(
+      ],
+      '<div><p>  </p></div>' => [
         "<div>\n</div>" => TRUE,
-      ),
-      '<blockquote><pre>aaa</pre></blockquote>' => array(
+      ],
+      '<blockquote><pre>aaa</pre></blockquote>' => [
         "<blockquote><pre>aaa</pre></blockquote>" => TRUE,
-      ),
-      "<pre>aaa\nbbb\nccc</pre>\nddd\neee" => array(
+      ],
+      "<pre>aaa\nbbb\nccc</pre>\nddd\neee" => [
         "<pre>aaa\nbbb\nccc</pre>" => TRUE,
         "<p>ddd<br />\neee</p>" => TRUE,
-      ),
+      ],
       // Comments remain unchanged and subsequent lines/paragraphs are
       // transformed normally.
-      "aaa<!--comment-->\n\nbbb\n\nccc\n\nddd<!--comment\nwith linebreak-->\n\neee\n\nfff" => array(
+      "aaa<!--comment-->\n\nbbb\n\nccc\n\nddd<!--comment\nwith linebreak-->\n\neee\n\nfff" => [
         "<p>aaa</p>\n<!--comment--><p>\nbbb</p>\n<p>ccc</p>\n<p>ddd</p>" => TRUE,
         "<!--comment\nwith linebreak--><p>\neee</p>\n<p>fff</p>" => TRUE,
-      ),
+      ],
       // Check that a comment in a PRE will result that the text after
       // the comment, but still in PRE, is not transformed.
-      "<pre>aaa\nbbb<!-- comment -->\n\nccc</pre>\nddd" => array(
+      "<pre>aaa\nbbb<!-- comment -->\n\nccc</pre>\nddd" => [
         "<pre>aaa\nbbb<!-- comment -->\n\nccc</pre>" => TRUE,
-      ),
+      ],
       // Bug 810824, paragraphs were appearing around iframe tags.
-      "<iframe>aaa</iframe>\n\n" => array(
+      "<iframe>aaa</iframe>\n\n" => [
         "<p><iframe>aaa</iframe></p>" => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->assertFilteredString($filter, $tests);
 
     // Very long string hitting PCRE limits.
@@ -406,13 +406,13 @@ function testLineBreakFilter() {
   function testHtmlFilter() {
     // Get FilterHtml object.
     $filter = $this->filters['filter_html'];
-    $filter->setConfiguration(array(
-      'settings' => array(
+    $filter->setConfiguration([
+      'settings' => [
         'allowed_html' => '<a> <p> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd> <br>',
         'filter_html_help' => 1,
         'filter_html_nofollow' => 0,
-      )
-    ));
+      ]
+    ]);
 
     // HTML filter is not able to secure some tags, these should never be
     // allowed.
@@ -461,25 +461,25 @@ function testHtmlFilter() {
     $this->assertNormalized($f, '<a>link</a>', 'HTML filter should remove attributes that are not explicitly allowed.');
 
     // Now whitelist the "llama" attribute on <a>.
-    $filter->setConfiguration(array(
-      'settings' => array(
+    $filter->setConfiguration([
+      'settings' => [
         'allowed_html' => '<a href llama> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd> <br>',
         'filter_html_help' => 1,
         'filter_html_nofollow' => 0,
-      )
-    ));
+      ]
+    ]);
     $f = (string) $filter->process('<a kitten="cute" llama="awesome">link</a>', Language::LANGCODE_NOT_SPECIFIED);
     $this->assertNormalized($f, '<a llama="awesome">link</a>', 'HTML filter keeps explicitly allowed attributes, and removes attributes that are not explicitly allowed.');
 
     // Restrict the whitelisted "llama" attribute on <a> to only allow the value
     // "majestical", or "epic".
-    $filter->setConfiguration(array(
-      'settings' => array(
+    $filter->setConfiguration([
+      'settings' => [
         'allowed_html' => '<a href llama="majestical epic"> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd> <br>',
         'filter_html_help' => 1,
         'filter_html_nofollow' => 0,
-      )
-    ));
+      ]
+    ]);
     $f = (string) $filter->process('<a kitten="cute" llama="awesome">link</a>', Language::LANGCODE_NOT_SPECIFIED);
     $this->assertIdentical($f, '<a>link</a>', 'HTML filter removes allowed attributes that do not have an explicitly allowed value.');
     $f = (string) $filter->process('<a kitten="cute" llama="majestical">link</a>', Language::LANGCODE_NOT_SPECIFIED);
@@ -496,13 +496,13 @@ function testHtmlFilter() {
   function testNoFollowFilter() {
     // Get FilterHtml object.
     $filter = $this->filters['filter_html'];
-    $filter->setConfiguration(array(
-      'settings' => array(
+    $filter->setConfiguration([
+      'settings' => [
         'allowed_html' => '<a href>',
         'filter_html_help' => 1,
         'filter_html_nofollow' => 1,
-      )
-    ));
+      ]
+    ]);
 
     // Test if the rel="nofollow" attribute is added, even if we try to prevent
     // it.
@@ -530,13 +530,13 @@ function testHtmlEscapeFilter() {
     // Get FilterHtmlEscape object.
     $filter = $this->filters['filter_html_escape'];
 
-    $tests = array(
-      "   One. <!-- \"comment\" --> Two'.\n<p>Three.</p>\n    " => array(
+    $tests = [
+      "   One. <!-- \"comment\" --> Two'.\n<p>Three.</p>\n    " => [
         "One. &lt;!-- &quot;comment&quot; --&gt; Two&#039;.\n&lt;p&gt;Three.&lt;/p&gt;" => TRUE,
         '   One.' => FALSE,
         "</p>\n    " => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->assertFilteredString($filter, $tests);
   }
 
@@ -546,11 +546,11 @@ function testHtmlEscapeFilter() {
   function testUrlFilter() {
     // Get FilterUrl object.
     $filter = $this->filters['filter_url'];
-    $filter->setConfiguration(array(
-      'settings' => array(
+    $filter->setConfiguration([
+      'settings' => [
         'filter_url_length' => 496,
-      )
-    ));
+      ]
+    ]);
 
     // @todo Possible categories:
     // - absolute, mail, partial
@@ -562,24 +562,24 @@ function testUrlFilter() {
     $email_with_plus_sign = 'one+two@example.com';
 
     // Filter selection/pattern matching.
-    $tests = array(
+    $tests = [
       // HTTP URLs.
       '
 http://example.com or www.example.com
-' => array(
+' => [
         '<a href="http://example.com">http://example.com</a>' => TRUE,
         '<a href="http://www.example.com">www.example.com</a>' => TRUE,
-      ),
+      ],
       // MAILTO URLs.
       '
 person@example.com or mailto:person2@example.com or ' . $email_with_plus_sign . ' or ' . $long_email . ' but not ' . $too_long_email . '
-' => array(
+' => [
         '<a href="mailto:person@example.com">person@example.com</a>' => TRUE,
         '<a href="mailto:person2@example.com">mailto:person2@example.com</a>' => TRUE,
         '<a href="mailto:' . $long_email . '">' . $long_email . '</a>' => TRUE,
         '<a href="mailto:' . $too_long_email . '">' . $too_long_email . '</a>' => FALSE,
         '<a href="mailto:' . $email_with_plus_sign . '">' . $email_with_plus_sign . '</a>' => TRUE,
-      ),
+      ],
       // URI parts and special characters.
       '
 http://trailingslash.com/ or www.trailingslash.com/
@@ -589,7 +589,7 @@ function testUrlFilter() {
 ftp://user:pass@ftp.example.com/~home/dir1
 sftp://user@nonstandardport:222/dir
 ssh://192.168.0.100/srv/git/drupal.git
-' => array(
+' => [
         '<a href="http://trailingslash.com/">http://trailingslash.com/</a>' => TRUE,
         '<a href="http://www.trailingslash.com/">www.trailingslash.com/</a>' => TRUE,
         '<a href="http://host.com/some/path?query=foo&amp;bar[baz]=beer#fragment">http://host.com/some/path?query=foo&amp;bar[baz]=beer#fragment</a>' => TRUE,
@@ -599,7 +599,7 @@ function testUrlFilter() {
         '<a href="ftp://user:pass@ftp.example.com/~home/dir1">ftp://user:pass@ftp.example.com/~home/dir1</a>' => TRUE,
         '<a href="sftp://user@nonstandardport:222/dir">sftp://user@nonstandardport:222/dir</a>' => TRUE,
         '<a href="ssh://192.168.0.100/srv/git/drupal.git">ssh://192.168.0.100/srv/git/drupal.git</a>' => TRUE,
-      ),
+      ],
       // International Unicode characters.
       '
 http://пример.испытание/
@@ -609,7 +609,7 @@ function testUrlFilter() {
 http://例え.テスト/
 http://dréißig-bücher.de/
 http://méxico-mañana.es/
-' => array(
+' => [
         '<a href="http://пример.испытание/">http://пример.испытание/</a>' => TRUE,
         '<a href="http://مثال.إختبار/">http://مثال.إختبار/</a>' => TRUE,
         '<a href="http://例子.測試/">http://例子.測試/</a>' => TRUE,
@@ -617,25 +617,25 @@ function testUrlFilter() {
         '<a href="http://例え.テスト/">http://例え.テスト/</a>' => TRUE,
         '<a href="http://dréißig-bücher.de/">http://dréißig-bücher.de/</a>' => TRUE,
         '<a href="http://méxico-mañana.es/">http://méxico-mañana.es/</a>' => TRUE,
-      ),
+      ],
       // Encoding.
       '
 http://ampersand.com/?a=1&b=2
 http://encoded.com/?a=1&amp;b=2
-' => array(
+' => [
         '<a href="http://ampersand.com/?a=1&amp;b=2">http://ampersand.com/?a=1&amp;b=2</a>' => TRUE,
         '<a href="http://encoded.com/?a=1&amp;b=2">http://encoded.com/?a=1&amp;b=2</a>' => TRUE,
-      ),
+      ],
       // Domain name length.
       '
 www.ex.ex or www.example.example or www.toolongdomainexampledomainexampledomainexampledomainexampledomain or
 me@me.tv
-' => array(
+' => [
         '<a href="http://www.ex.ex">www.ex.ex</a>' => TRUE,
         '<a href="http://www.example.example">www.example.example</a>' => TRUE,
         'http://www.toolong' => FALSE,
         '<a href="mailto:me@me.tv">me@me.tv</a>' => TRUE,
-      ),
+      ],
       // Absolute URL protocols.
       // The list to test is found in the beginning of _filter_url() at
       // $protocols = \Drupal::getContainer()->getParameter('filter_protocols').
@@ -650,7 +650,7 @@ function testUrlFilter() {
 webcal://calendar,
 rtsp://127.0.0.1,
 not foo://disallowed.com.
-' => array(
+' => [
         'href="https://example.com"' => TRUE,
         'href="ftp://ftp.example.com"' => TRUE,
         'href="news://example.net"' => TRUE,
@@ -662,12 +662,12 @@ function testUrlFilter() {
         'href="rtsp://127.0.0.1"' => TRUE,
         'href="foo://disallowed.com"' => FALSE,
         'not foo://disallowed.com.' => TRUE,
-      ),
-    );
+      ],
+    ];
     $this->assertFilteredString($filter, $tests);
 
     // Surrounding text/punctuation.
-    $tests = array(
+    $tests = [
       '
 Partial URL with trailing period www.partial.com.
 Email with trailing comma person@example.com,
@@ -680,7 +680,7 @@ function testUrlFilter() {
 Absolute URL with square brackets in the URL as well as surrounded brackets [https://www.drupal.org/?class[]=1]
 Absolute URL with quotes "https://www.drupal.org/sample"
 
-' => array(
+' => [
         'period <a href="http://www.partial.com">www.partial.com</a>.' => TRUE,
         'comma <a href="mailto:person@example.com">person@example.com</a>,' => TRUE,
         'question <a href="http://www.absolute.com">http://www.absolute.com</a>?' => TRUE,
@@ -691,45 +691,45 @@ function testUrlFilter() {
         'brackets (<a href="http://www.foo.com/more_(than)_one_(parens)">www.foo.com/more_(than)_one_(parens)</a>).' => TRUE,
         'brackets [<a href="https://www.drupal.org/?class[]=1">https://www.drupal.org/?class[]=1</a>]' => TRUE,
         'quotes "<a href="https://www.drupal.org/sample">https://www.drupal.org/sample</a>"' => TRUE,
-      ),
+      ],
       '
 (www.parenthesis.com/dir?a=1&b=2#a)
-' => array(
+' => [
         '(<a href="http://www.parenthesis.com/dir?a=1&amp;b=2#a">www.parenthesis.com/dir?a=1&amp;b=2#a</a>)' => TRUE,
-      ),
-    );
+      ],
+    ];
     $this->assertFilteredString($filter, $tests);
 
     // Surrounding markup.
-    $tests = array(
+    $tests = [
       '
 <p xmlns="www.namespace.com" />
 <p xmlns="http://namespace.com">
 An <a href="http://example.com" title="Read more at www.example.info...">anchor</a>.
 </p>
-' => array(
+' => [
         '<p xmlns="www.namespace.com" />' => TRUE,
         '<p xmlns="http://namespace.com">' => TRUE,
         'href="http://www.namespace.com"' => FALSE,
         'href="http://namespace.com"' => FALSE,
         'An <a href="http://example.com" title="Read more at www.example.info...">anchor</a>.' => TRUE,
-      ),
+      ],
       '
 Not <a href="foo">www.relative.com</a> or <a href="http://absolute.com">www.absolute.com</a>
 but <strong>http://www.strong.net</strong> or <em>www.emphasis.info</em>
-' => array(
+' => [
         '<a href="foo">www.relative.com</a>' => TRUE,
         'href="http://www.relative.com"' => FALSE,
         '<a href="http://absolute.com">www.absolute.com</a>' => TRUE,
         '<strong><a href="http://www.strong.net">http://www.strong.net</a></strong>' => TRUE,
         '<em><a href="http://www.emphasis.info">www.emphasis.info</a></em>' => TRUE,
-      ),
+      ],
       '
 Test <code>using www.example.com the code tag</code>.
-' => array(
+' => [
         'href' => FALSE,
         'http' => FALSE,
-      ),
+      ],
       '
 Intro.
 <blockquote>
@@ -737,7 +737,7 @@ function testUrlFilter() {
 </blockquote>
 
 Outro.
-' => array(
+' => [
         'href="http://www.example.com"' => TRUE,
         'href="mailto:person@example.com"' => TRUE,
         'href="http://origin.example.com"' => TRUE,
@@ -745,18 +745,18 @@ function testUrlFilter() {
         'http://www.example.info' => FALSE,
         'Intro.' => TRUE,
         'Outro.' => TRUE,
-      ),
+      ],
       '
 Unknown tag <x>containing x and www.example.com</x>? And a tag <pooh>beginning with p and containing www.example.pooh with p?</pooh>
-' => array(
+' => [
         'href="http://www.example.com"' => TRUE,
         'href="http://www.example.pooh"' => TRUE,
-      ),
+      ],
       '
 <p>Test &lt;br/&gt;: This is a www.example17.com example <strong>with</strong> various http://www.example18.com tags. *<br/>
  It is important www.example19.com to *<br/>test different URLs and http://www.example20.com in the same paragraph. *<br>
 HTML www.example21.com soup by person@example22.com can litererally http://www.example23.com contain *img*<img> anything. Just a www.example24.com with http://www.example25.com thrown in. www.example26.com from person@example27.com with extra http://www.example28.com.
-' => array(
+' => [
         'href="http://www.example17.com"' => TRUE,
         'href="http://www.example18.com"' => TRUE,
         'href="http://www.example19.com"' => TRUE,
@@ -769,7 +769,7 @@ function testUrlFilter() {
         'href="http://www.example26.com"' => TRUE,
         'href="mailto:person@example27.com"' => TRUE,
         'href="http://www.example28.com"' => TRUE,
-      ),
+      ],
       '
 <script>
 <!--
@@ -781,33 +781,33 @@ function testUrlFilter() {
   var exampleurl = "http://example.net";
 //--><!]]>
 </script>
-' => array(
+' => [
         'href="http://www.example.com"' => FALSE,
         'href="http://example.net"' => FALSE,
-      ),
+      ],
       '
 <style>body {
   background: url(http://example.com/pixel.gif);
 }</style>
-' => array(
+' => [
         'href' => FALSE,
-      ),
+      ],
       '
 <!-- Skip any URLs like www.example.com in comments -->
-' => array(
+' => [
         'href' => FALSE,
-      ),
+      ],
       '
 <!-- Skip any URLs like
 www.example.com with a newline in comments -->
-' => array(
+' => [
         'href' => FALSE,
-      ),
+      ],
       '
 <!-- Skip any URLs like www.comment.com in comments. <p>Also ignore http://commented.out/markup.</p> -->
-' => array(
+' => [
         'href' => FALSE,
-      ),
+      ],
       '
 <dl>
 <dt>www.example.com</dt>
@@ -816,39 +816,39 @@ function testUrlFilter() {
 <dt>Check www.example.net</dt>
 <dd>Some text around http://www.example.info by person@example.info?</dd>
 </dl>
-' => array(
+' => [
         'href="http://www.example.com"' => TRUE,
         'href="http://example.com"' => TRUE,
         'href="mailto:person@example.com"' => TRUE,
         'href="http://www.example.net"' => TRUE,
         'href="http://www.example.info"' => TRUE,
         'href="mailto:person@example.info"' => TRUE,
-      ),
+      ],
       '
 <div>www.div.com</div>
 <ul>
 <li>http://listitem.com</li>
 <li class="odd">www.class.listitem.com</li>
 </ul>
-' => array(
+' => [
         '<div><a href="http://www.div.com">www.div.com</a></div>' => TRUE,
         '<li><a href="http://listitem.com">http://listitem.com</a></li>' => TRUE,
         '<li class="odd"><a href="http://www.class.listitem.com">www.class.listitem.com</a></li>' => TRUE,
-      ),
-    );
+      ],
+    ];
     $this->assertFilteredString($filter, $tests);
 
     // URL trimming.
-    $filter->setConfiguration(array(
-      'settings' => array(
+    $filter->setConfiguration([
+      'settings' => [
         'filter_url_length' => 20,
-      )
-    ));
-    $tests = array(
-      'www.trimmed.com/d/ff.ext?a=1&b=2#a1' => array(
+      ]
+    ]);
+    $tests = [
+      'www.trimmed.com/d/ff.ext?a=1&b=2#a1' => [
         '<a href="http://www.trimmed.com/d/ff.ext?a=1&amp;b=2#a1">www.trimmed.com/d/f…</a>' => TRUE,
-      ),
-    );
+      ],
+    ];
     $this->assertFilteredString($filter, $tests);
   }
 
@@ -877,18 +877,18 @@ function assertFilteredString($filter, $tests) {
       foreach ($tasks as $value => $is_expected) {
         // Not using assertIdentical, since combination with strpos() is hard to grok.
         if ($is_expected) {
-          $success = $this->assertTrue(strpos($result, $value) !== FALSE, format_string('@source: @value found. Filtered result: @result.', array(
+          $success = $this->assertTrue(strpos($result, $value) !== FALSE, format_string('@source: @value found. Filtered result: @result.', [
             '@source' => var_export($source, TRUE),
             '@value' => var_export($value, TRUE),
             '@result' => var_export($result, TRUE),
-          )));
+          ]));
         }
         else {
-          $success = $this->assertTrue(strpos($result, $value) === FALSE, format_string('@source: @value not found. Filtered result: @result.', array(
+          $success = $this->assertTrue(strpos($result, $value) === FALSE, format_string('@source: @value not found. Filtered result: @result.', [
             '@source' => var_export($source, TRUE),
             '@value' => var_export($value, TRUE),
             '@result' => var_export($result, TRUE),
-          )));
+          ]));
         }
         if (!$success) {
           $this->verbose('Source:<pre>' . Html::escape(var_export($source, TRUE)) . '</pre>'
@@ -921,11 +921,11 @@ function assertFilteredString($filter, $tests) {
   function testUrlFilterContent() {
     // Get FilterUrl object.
     $filter = $this->filters['filter_url'];
-    $filter->setConfiguration(array(
-      'settings' => array(
+    $filter->setConfiguration([
+      'settings' => [
         'filter_url_length' => 496,
-      )
-    ));
+      ]
+    ]);
     $path = __DIR__ . '/../..';
 
     $input = file_get_contents($path . '/filter.url-input.txt');
@@ -1067,7 +1067,7 @@ function testHtmlCorrectorFilter() {
 
 /*--><!]]>*/
 </style></p>',
-      format_string('HTML corrector -- Existing cdata section @pattern_name properly escaped', array('@pattern_name' => '/*<![CDATA[*/'))
+      format_string('HTML corrector -- Existing cdata section @pattern_name properly escaped', ['@pattern_name' => '/*<![CDATA[*/'])
     );
 
     $filtered_data = Html::normalize('<p><style>
@@ -1086,7 +1086,7 @@ function testHtmlCorrectorFilter() {
 
 /*--><!]]>*/
 </style></p>',
-      format_string('HTML corrector -- Existing cdata section @pattern_name properly escaped', array('@pattern_name' => '<!--/*--><![CDATA[/* ><!--*/'))
+      format_string('HTML corrector -- Existing cdata section @pattern_name properly escaped', ['@pattern_name' => '<!--/*--><![CDATA[/* ><!--*/'])
     );
 
     $filtered_data = Html::normalize('<p><script>
@@ -1103,7 +1103,7 @@ function testHtmlCorrectorFilter() {
 
 //--><!]]>
 </script></p>',
-      format_string('HTML corrector -- Existing cdata section @pattern_name properly escaped', array('@pattern_name' => '<!--//--><![CDATA[// ><!--'))
+      format_string('HTML corrector -- Existing cdata section @pattern_name properly escaped', ['@pattern_name' => '<!--//--><![CDATA[// ><!--'])
     );
 
     $filtered_data = Html::normalize('<p><script>
@@ -1120,7 +1120,7 @@ function testHtmlCorrectorFilter() {
 
 //--><!]]>
 </script></p>',
-      format_string('HTML corrector -- Existing cdata section @pattern_name properly escaped', array('@pattern_name' => '// <![CDATA['))
+      format_string('HTML corrector -- Existing cdata section @pattern_name properly escaped', ['@pattern_name' => '// <![CDATA['])
     );
 
   }
diff --git a/core/modules/filter/tests/src/Kernel/FilterSettingsTest.php b/core/modules/filter/tests/src/Kernel/FilterSettingsTest.php
index dc77eb41689e349cdd97a01a99a9c543332e0b5a..829840c3194fa108770904da86f97a55bf57a6e9 100644
--- a/core/modules/filter/tests/src/Kernel/FilterSettingsTest.php
+++ b/core/modules/filter/tests/src/Kernel/FilterSettingsTest.php
@@ -17,7 +17,7 @@ class FilterSettingsTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter');
+  public static $modules = ['filter'];
 
   /**
    * Tests explicit and implicit default settings for filters.
@@ -26,21 +26,21 @@ function testFilterDefaults() {
     $filter_info = $this->container->get('plugin.manager.filter')->getDefinitions();
 
     // Create text format using filter default settings.
-    $filter_defaults_format = FilterFormat::create(array(
+    $filter_defaults_format = FilterFormat::create([
       'format' => 'filter_defaults',
       'name' => 'Filter defaults',
-    ));
+    ]);
     $filter_defaults_format->save();
 
     // Verify that default weights defined in hook_filter_info() were applied.
-    $saved_settings = array();
+    $saved_settings = [];
     foreach ($filter_defaults_format->filters() as $name => $filter) {
       $expected_weight = $filter_info[$name]['weight'];
-      $this->assertEqual($filter->weight, $expected_weight, format_string('@name filter weight %saved equals %default', array(
+      $this->assertEqual($filter->weight, $expected_weight, format_string('@name filter weight %saved equals %default', [
         '@name' => $name,
         '%saved' => $filter->weight,
         '%default' => $expected_weight,
-      )));
+      ]));
       $saved_settings[$name]['weight'] = $expected_weight;
     }
 
@@ -51,11 +51,11 @@ function testFilterDefaults() {
 
     // Verify that saved filter settings have not been changed.
     foreach ($filter_defaults_format->filters() as $name => $filter) {
-      $this->assertEqual($filter->weight, $saved_settings[$name]['weight'], format_string('@name filter weight %saved equals %previous', array(
+      $this->assertEqual($filter->weight, $saved_settings[$name]['weight'], format_string('@name filter weight %saved equals %previous', [
         '@name' => $name,
         '%saved' => $filter->weight,
         '%previous' => $saved_settings[$name]['weight'],
-      )));
+      ]));
     }
   }
 
diff --git a/core/modules/filter/tests/src/Kernel/Migrate/d7/MigrateFilterFormatTest.php b/core/modules/filter/tests/src/Kernel/Migrate/d7/MigrateFilterFormatTest.php
index e4053ae18ce4f3d838fb5d65c440418f102f19bc..0f54245c1af4c1f2a6f618f9d74e7a053439257c 100644
--- a/core/modules/filter/tests/src/Kernel/Migrate/d7/MigrateFilterFormatTest.php
+++ b/core/modules/filter/tests/src/Kernel/Migrate/d7/MigrateFilterFormatTest.php
@@ -16,7 +16,7 @@ class MigrateFilterFormatTest extends MigrateDrupal7TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('filter');
+  public static $modules = ['filter'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d7/FilterFormatTest.php b/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d7/FilterFormatTest.php
index f68b93579319830d32aa2daf57740059e19e39f1..2dc9ce7c51f97ec46f7944e1e461e8cf8096ebd4 100644
--- a/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d7/FilterFormatTest.php
+++ b/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d7/FilterFormatTest.php
@@ -48,7 +48,7 @@ public function providerSource() {
         'name' => 'filter_autop',
         'weight' => 0,
         'status' => 1,
-        'settings' => serialize(array()),
+        'settings' => serialize([]),
       ],
       [
         'format' => 'custom_text_format',
@@ -56,7 +56,7 @@ public function providerSource() {
         'name' => 'filter_html',
         'weight' => 1,
         'status' => 1,
-        'settings' => serialize(array()),
+        'settings' => serialize([]),
       ],
       [
         'format' => 'full_html',
@@ -64,7 +64,7 @@ public function providerSource() {
         'name' => 'filter_url',
         'weight' => 0,
         'status' => 1,
-        'settings' => serialize(array()),
+        'settings' => serialize([]),
       ],
     ];
 
diff --git a/core/modules/forum/forum.install b/core/modules/forum/forum.install
index 36c71e46b47283e573a505d58b65bbce4250aeff..4a16a8939a88b0849e42b4371770a07bd0a4464a 100644
--- a/core/modules/forum/forum.install
+++ b/core/modules/forum/forum.install
@@ -21,13 +21,13 @@ function forum_install() {
 
   if (!\Drupal::service('config.installer')->isSyncing()) {
     // Create a default forum so forum posts can be created.
-    $term = Term::create(array(
+    $term = Term::create([
       'name' => t('General discussion'),
       'description' => '',
-      'parent' => array(0),
+      'parent' => [0],
       'vid' => 'forums',
       'forum_container' => 0,
-    ));
+    ]);
     $term->save();
   }
 }
@@ -61,117 +61,117 @@ function forum_uninstall() {
  * Implements hook_schema().
  */
 function forum_schema() {
-  $schema['forum'] = array(
+  $schema['forum'] = [
     'description' => 'Stores the relationship of nodes to forum terms.',
-    'fields' => array(
-      'nid' => array(
+    'fields' => [
+      'nid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The {node}.nid of the node.',
-      ),
-      'vid' => array(
+      ],
+      'vid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'Primary Key: The {node}.vid of the node.',
-      ),
-      'tid' => array(
+      ],
+      'tid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The {taxonomy_term_data}.tid of the forum term assigned to the node.',
-      ),
-    ),
-    'indexes' => array(
-      'forum_topic' => array('nid', 'tid'),
-      'tid' => array('tid'),
-    ),
-    'primary key' => array('vid'),
-    'foreign keys' => array(
-      'forum_node' => array(
+      ],
+    ],
+    'indexes' => [
+      'forum_topic' => ['nid', 'tid'],
+      'tid' => ['tid'],
+    ],
+    'primary key' => ['vid'],
+    'foreign keys' => [
+      'forum_node' => [
         'table' => 'node',
-        'columns' => array(
+        'columns' => [
           'nid' => 'nid',
           'vid' => 'vid',
-        ),
-      ),
-    ),
-  );
+        ],
+      ],
+    ],
+  ];
 
-  $schema['forum_index'] = array(
+  $schema['forum_index'] = [
     'description' => 'Maintains denormalized information about node/term relationships.',
-    'fields' => array(
-      'nid' => array(
+    'fields' => [
+      'nid' => [
         'description' => 'The {node}.nid this record tracks.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'title' => array(
+      ],
+      'title' => [
         'description' => 'The node title.',
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'tid' => array(
+      ],
+      'tid' => [
          'description' => 'The term ID.',
          'type' => 'int',
          'unsigned' => TRUE,
          'not null' => TRUE,
          'default' => 0,
-      ),
-      'sticky' => array(
+      ],
+      'sticky' => [
         'description' => 'Boolean indicating whether the node is sticky.',
         'type' => 'int',
         'not null' => FALSE,
         'default' => 0,
         'size' => 'tiny',
-      ),
-      'created' => array(
+      ],
+      'created' => [
         'description' => 'The Unix timestamp when the node was created.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'last_comment_timestamp' => array(
+      ],
+      'last_comment_timestamp' => [
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The Unix timestamp of the last comment that was posted within this node, from {comment}.timestamp.',
-      ),
-      'comment_count' => array(
+      ],
+      'comment_count' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The total number of comments on this node.',
-      ),
-    ),
-    'indexes' => array(
-      'forum_topics' => array('nid', 'tid', 'sticky', 'last_comment_timestamp'),
-      'created' => array('created'),
-      'last_comment_timestamp' => array('last_comment_timestamp'),
-    ),
-    'foreign keys' => array(
-      'tracked_node' => array(
+      ],
+    ],
+    'indexes' => [
+      'forum_topics' => ['nid', 'tid', 'sticky', 'last_comment_timestamp'],
+      'created' => ['created'],
+      'last_comment_timestamp' => ['last_comment_timestamp'],
+    ],
+    'foreign keys' => [
+      'tracked_node' => [
         'table' => 'node',
-        'columns' => array('nid' => 'nid'),
-      ),
-      'term' => array(
+        'columns' => ['nid' => 'nid'],
+      ],
+      'term' => [
         'table' => 'taxonomy_term_data',
-        'columns' => array(
+        'columns' => [
           'tid' => 'tid',
-        ),
-      ),
-    ),
-  );
+        ],
+      ],
+    ],
+  ];
 
   return $schema;
 }
diff --git a/core/modules/forum/forum.module b/core/modules/forum/forum.module
index 8d4a9f459da6b70d4e43937df2c5f3064e08e9b1..c2de3c9e0bde94974060ac64b698150595479cde 100644
--- a/core/modules/forum/forum.module
+++ b/core/modules/forum/forum.module
@@ -24,7 +24,7 @@ function forum_help($route_name, RouteMatchInterface $route_match) {
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
       $output .= '<p>' . t('The Forum module lets you create threaded discussion forums with functionality similar to other message board systems. In a forum, users post topics and threads in nested hierarchies, allowing discussions to be categorized and grouped.') . '</p>';
-      $output .= '<p>' . t('The Forum module adds and uses a content type called <em>Forum topic</em>. For background information on content types, see the <a href=":node_help">Node module help page</a>.', array(':node_help' => \Drupal::url('help.page', array('name' => 'node')))) . '</p>';
+      $output .= '<p>' . t('The Forum module adds and uses a content type called <em>Forum topic</em>. For background information on content types, see the <a href=":node_help">Node module help page</a>.', [':node_help' => \Drupal::url('help.page', ['name' => 'node'])]) . '</p>';
       $output .= '<p>' . t('A forum is represented by a hierarchical structure, consisting of:');
       $output .= '<ul>';
       $output .= '<li>' . t('<em>Forums</em> (for example, <em>Recipes for cooking vegetables</em>)') . '</li>';
@@ -33,15 +33,15 @@ function forum_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<li>' . t('Optional <em>containers</em>, used to group similar forums. Forums can be placed inside containers, and vice versa.') . '</li>';
       $output .= '</ul>';
       $output .= '</p>';
-      $output .= '<p>' . t('For more information, see the <a href=":forum">online documentation for the Forum module</a>.', array(':forum' => 'https://www.drupal.org/documentation/modules/forum')) . '</p>';
+      $output .= '<p>' . t('For more information, see the <a href=":forum">online documentation for the Forum module</a>.', [':forum' => 'https://www.drupal.org/documentation/modules/forum']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Setting up the forum structure') . '</dt>';
-      $output .= '<dd>' . t('Visit the <a href=":forums">Forums page</a> to set up containers and forums to hold your discussion topics.', array(':forums' => \Drupal::url('forum.overview'))) . '</dd>';
+      $output .= '<dd>' . t('Visit the <a href=":forums">Forums page</a> to set up containers and forums to hold your discussion topics.', [':forums' => \Drupal::url('forum.overview')]) . '</dd>';
       $output .= '<dt>' . t('Starting a discussion') . '</dt>';
-      $output .= '<dd>' . t('The <a href=":create-topic">Forum topic</a> link on the <a href=":content-add">Add content</a> page creates the first post of a new threaded discussion, or thread.', array(':create-topic' => \Drupal::url('node.add', array('node_type' => 'forum')), ':content-add' => \Drupal::url('node.add_page'))) . '</dd>';
+      $output .= '<dd>' . t('The <a href=":create-topic">Forum topic</a> link on the <a href=":content-add">Add content</a> page creates the first post of a new threaded discussion, or thread.', [':create-topic' => \Drupal::url('node.add', ['node_type' => 'forum']), ':content-add' => \Drupal::url('node.add_page')]) . '</dd>';
       $output .= '<dt>' . t('Navigating in the forum') . '</dt>';
-      $output .= '<dd>' . t('Enabling the Forum module provides a default <em>Forums</em> menu item in the Tools menu that links to the <a href=":forums">Forums page</a>.', array(':forums' => \Drupal::url('forum.index'))) . '</dd>';
+      $output .= '<dd>' . t('Enabling the Forum module provides a default <em>Forums</em> menu item in the Tools menu that links to the <a href=":forums">Forums page</a>.', [':forums' => \Drupal::url('forum.index')]) . '</dd>';
       $output .= '<dt>' . t('Moving forum topics') . '</dt>';
       $output .= '<dd>' . t('A forum topic (and all of its comments) may be moved between forums by selecting a different forum while editing a forum topic. When moving a forum topic between forums, the <em>Leave shadow copy</em> option creates a link in the original forum pointing to the new location.') . '</dd>';
       $output .= '<dt>' . t('Locking and disabling comments') . '</dt>';
@@ -51,21 +51,21 @@ function forum_help($route_name, RouteMatchInterface $route_match) {
 
     case 'forum.overview':
       $output = '<p>' . t('Forums contain forum topics. Use containers to group related forums.') . '</p>';
-      $more_help_link = array(
+      $more_help_link = [
         '#type' => 'link',
         '#url' => Url::fromRoute('help.page', ['name' => 'forum']),
         '#title' => t('More help'),
-        '#attributes' => array(
-          'class' => array('icon-help'),
-        ),
-      );
-      $container = array(
+        '#attributes' => [
+          'class' => ['icon-help'],
+        ],
+      ];
+      $container = [
         '#theme' => 'container',
         '#children' => $more_help_link,
-        '#attributes' => array(
-          'class' => array('more-link'),
-        ),
-      );
+        '#attributes' => [
+          'class' => ['more-link'],
+        ],
+      ];
       $output .= \Drupal::service('renderer')->renderPlain($container);
       return $output;
 
@@ -76,7 +76,7 @@ function forum_help($route_name, RouteMatchInterface $route_match) {
       return '<p>' . t('A forum holds related forum topics.') . '</p>';
 
     case 'forum.settings':
-      return '<p>' . t('Adjust the display of your forum topics. Organize the forums on the <a href=":forum-structure">forum structure page</a>.', array(':forum-structure' => \Drupal::url('forum.overview'))) . '</p>';
+      return '<p>' . t('Adjust the display of your forum topics. Organize the forums on the <a href=":forum-structure">forum structure page</a>.', [':forum-structure' => \Drupal::url('forum.overview')]) . '</p>';
   }
 }
 
@@ -84,20 +84,20 @@ function forum_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function forum_theme() {
-  return array(
-    'forums' => array(
-      'variables' => array('forums' => array(), 'topics' => array(), 'topics_pager' => array(), 'parents' => NULL, 'term' => NULL, 'sortby' => NULL, 'forum_per_page' => NULL, 'header' => array()),
-    ),
-    'forum_list' => array(
-      'variables' => array('forums' => NULL, 'parents' => NULL, 'tid' => NULL),
-    ),
-    'forum_icon' => array(
-      'variables' => array('new_posts' => NULL, 'num_posts' => 0, 'comment_mode' => 0, 'sticky' => 0, 'first_new' => FALSE),
-    ),
-    'forum_submitted' => array(
-      'variables' => array('topic' => NULL),
-    ),
-  );
+  return [
+    'forums' => [
+      'variables' => ['forums' => [], 'topics' => [], 'topics_pager' => [], 'parents' => NULL, 'term' => NULL, 'sortby' => NULL, 'forum_per_page' => NULL, 'header' => []],
+    ],
+    'forum_list' => [
+      'variables' => ['forums' => NULL, 'parents' => NULL, 'tid' => NULL],
+    ],
+    'forum_icon' => [
+      'variables' => ['new_posts' => NULL, 'num_posts' => 0, 'comment_mode' => 0, 'sticky' => 0, 'first_new' => FALSE],
+    ],
+    'forum_submitted' => [
+      'variables' => ['topic' => NULL],
+    ],
+  ];
 }
 
 /**
@@ -158,7 +158,7 @@ function forum_node_presave(EntityInterface $node) {
         $old_tid = \Drupal::service('forum.index_storage')->getOriginalTermId($node);
         if ($old_tid && isset($node->forum_tid) && ($node->forum_tid != $old_tid) && !empty($node->shadow)) {
           // A shadow copy needs to be created. Retain new term and add old term.
-          $node->taxonomy_forums[count($node->taxonomy_forums)] = array('target_id' => $old_tid);
+          $node->taxonomy_forums[count($node->taxonomy_forums)] = ['target_id' => $old_tid];
         }
       }
     }
@@ -241,7 +241,7 @@ function forum_node_predelete(EntityInterface $node) {
  * Implements hook_ENTITY_TYPE_storage_load() for node entities.
  */
 function forum_node_storage_load($nodes) {
-  $node_vids = array();
+  $node_vids = [];
   foreach ($nodes as $node) {
     if (\Drupal::service('forum_manager')->checkNodeType($node)) {
       $node_vids[] = $node->getRevisionId();
@@ -289,10 +289,10 @@ function forum_form_taxonomy_vocabulary_form_alter(&$form, FormStateInterface $f
   $vid = \Drupal::config('forum.settings')->get('vocabulary');
   $vocabulary = $form_state->getFormObject()->getEntity();
   if ($vid == $vocabulary->id()) {
-    $form['help_forum_vocab'] = array(
+    $form['help_forum_vocab'] = [
       '#markup' => t('This is the designated forum vocabulary. Some of the normal vocabulary options have been removed.'),
       '#weight' => -1,
-    );
+    ];
     // Forum's vocabulary always has single hierarchy. Forums and containers
     // have only one parent or no parent for root items. By default this value
     // is 0.
@@ -324,13 +324,13 @@ function forum_form_node_form_alter(&$form, FormStateInterface $form_state, $for
     $forum_terms = $node->taxonomy_forums;
     // If editing, give option to leave shadows.
     $shadow = (count($forum_terms) > 1);
-    $form['shadow'] = array(
+    $form['shadow'] = [
       '#type' => 'checkbox',
       '#title' => t('Leave shadow copy'),
       '#default_value' => $shadow,
       '#description' => t('If you move this topic, you can leave a link in the old forum to the new forum.'),
-    );
-    $form['forum_tid'] = array('#type' => 'value', '#value' => $node->forum_tid);
+    ];
+    $form['forum_tid'] = ['#type' => 'value', '#value' => $node->forum_tid];
   }
 
   if (isset($form['taxonomy_forums'])) {
@@ -361,7 +361,7 @@ function forum_preprocess_block(&$variables) {
  * Implements hook_theme_suggestions_HOOK().
  */
 function forum_theme_suggestions_forums(array $variables) {
-  $suggestions = array();
+  $suggestions = [];
   $tid = $variables['term']->id();
 
   // Provide separate template suggestions based on what's being output. Topic
@@ -408,24 +408,24 @@ function template_preprocess_forums(&$variables) {
   $variables['tid'] = $variables['term']->id();
   if ($variables['forums_defined'] = count($variables['forums']) || count($variables['parents'])) {
     if (!empty($variables['forums'])) {
-      $variables['forums'] = array(
+      $variables['forums'] = [
         '#theme' => 'forum_list',
         '#forums' => $variables['forums'],
         '#parents' => $variables['parents'],
         '#tid' => $variables['tid'],
-      );
+      ];
     }
 
     if ($variables['term'] && empty($variables['term']->forum_container->value) && !empty($variables['topics'])) {
       $forum_topic_list_header = $variables['header'];
 
-      $table = array(
+      $table = [
         '#theme' => 'table__forum_topic_list',
         '#responsive' => FALSE,
-        '#attributes' => array('id' => 'forum-topic-' . $variables['tid']),
-        '#header' => array(),
-        '#rows' => array(),
-      );
+        '#attributes' => ['id' => 'forum-topic-' . $variables['tid']],
+        '#header' => [],
+        '#rows' => [],
+      ];
 
       if (!empty($forum_topic_list_header)) {
         $table['#header'] = $forum_topic_list_header;
@@ -433,14 +433,14 @@ function template_preprocess_forums(&$variables) {
 
       /** @var \Drupal\node\NodeInterface $topic */
       foreach ($variables['topics'] as $id => $topic) {
-        $variables['topics'][$id]->icon = array(
+        $variables['topics'][$id]->icon = [
           '#theme' => 'forum_icon',
           '#new_posts' => $topic->new,
           '#num_posts' => $topic->comment_count,
           '#comment_mode' => $topic->comment_mode,
           '#sticky' => $topic->isSticky(),
           '#first_new' => $topic->first_new,
-        );
+        ];
 
         // We keep the actual tid in forum table, if it's different from the
         // current tid then it means the topic appears in two forums, one of
@@ -455,16 +455,16 @@ function template_preprocess_forums(&$variables) {
           $variables['topics'][$id]->title_link = \Drupal::l($topic->getTitle(), $topic->urlInfo());
           $variables['topics'][$id]->message = '';
         }
-        $forum_submitted = array('#theme' => 'forum_submitted', '#topic' => (object) array(
+        $forum_submitted = ['#theme' => 'forum_submitted', '#topic' => (object) [
           'uid' => $topic->getOwnerId(),
           'name' => $topic->getOwner()->getDisplayName(),
           'created' => $topic->getCreatedTime(),
-        ));
+        ]];
         $variables['topics'][$id]->submitted = drupal_render($forum_submitted);
-        $forum_submitted = array(
+        $forum_submitted = [
           '#theme' => 'forum_submitted',
           '#topic' => isset($topic->last_reply) ? $topic->last_reply : NULL,
-        );
+        ];
         $variables['topics'][$id]->last_reply = drupal_render($forum_submitted);
 
         $variables['topics'][$id]->new_text = '';
@@ -473,28 +473,28 @@ function template_preprocess_forums(&$variables) {
         if ($topic->new_replies) {
           $page_number = \Drupal::entityManager()->getStorage('comment')
             ->getNewCommentPageNumber($topic->comment_count, $topic->new_replies, $topic, 'comment_forum');
-          $query = $page_number ? array('page' => $page_number) : NULL;
-          $variables['topics'][$id]->new_text = \Drupal::translation()->formatPlural($topic->new_replies, '1 new post<span class="visually-hidden"> in topic %title</span>', '@count new posts<span class="visually-hidden"> in topic %title</span>', array('%title' => $variables['topics'][$id]->label()));
+          $query = $page_number ? ['page' => $page_number] : NULL;
+          $variables['topics'][$id]->new_text = \Drupal::translation()->formatPlural($topic->new_replies, '1 new post<span class="visually-hidden"> in topic %title</span>', '@count new posts<span class="visually-hidden"> in topic %title</span>', ['%title' => $variables['topics'][$id]->label()]);
           $variables['topics'][$id]->new_url = \Drupal::url('entity.node.canonical', ['node' => $topic->id()], ['query' => $query, 'fragment' => 'new']);
         }
 
         // Build table rows from topics.
-        $row = array();
-        $row[] = array(
-          'data' => array(
+        $row = [];
+        $row[] = [
+          'data' => [
             $topic->icon,
-            array(
+            [
               '#markup' => '<div class="forum__title"><div>' . $topic->title_link . '</div><div>' . $topic->submitted . '</div></div>',
-            ),
-          ),
-          'class' => array('forum__topic'),
-        );
+            ],
+          ],
+          'class' => ['forum__topic'],
+        ];
 
         if ($topic->moved) {
-          $row[] = array(
+          $row[] = [
             'data' => $topic->message,
             'colspan' => '2',
-          );
+          ];
         }
         else {
           $new_replies = '';
@@ -502,27 +502,27 @@ function template_preprocess_forums(&$variables) {
             $new_replies = '<br /><a href="' . $topic->new_url . '">' . $topic->new_text . '</a>';
           }
 
-          $row[] = array(
+          $row[] = [
             'data' => [
               [
                 '#prefix' => $topic->comment_count,
                 '#markup' => $new_replies,
               ],
             ],
-            'class' => array('forum__replies'),
-          );
-          $row[] = array(
+            'class' => ['forum__replies'],
+          ];
+          $row[] = [
             'data' => $topic->last_reply,
-            'class' => array('forum__last-reply'),
-          );
+            'class' => ['forum__last-reply'],
+          ];
         }
         $table['#rows'][] = $row;
       }
 
       $variables['topics'] = $table;
-      $variables['topics_pager'] = array(
+      $variables['topics_pager'] = [
         '#type' => 'pager',
-      );
+      ];
     }
   }
 }
@@ -545,7 +545,7 @@ function template_preprocess_forum_list(&$variables) {
   $row = 0;
   // Sanitize each forum so that the template can safely print the data.
   foreach ($variables['forums'] as $id => $forum) {
-    $variables['forums'][$id]->description = array('#markup' => $forum->description->value);
+    $variables['forums'][$id]->description = ['#markup' => $forum->description->value];
     $variables['forums'][$id]->link = forum_uri($forum);
     $variables['forums'][$id]->name = $forum->label();
     $variables['forums'][$id]->is_container = !empty($forum->forum_container->value);
@@ -561,20 +561,20 @@ function template_preprocess_forum_list(&$variables) {
     if ($user->isAuthenticated()) {
       $variables['forums'][$id]->new_topics = \Drupal::service('forum_manager')->unreadTopics($forum->id(), $user->id());
       if ($variables['forums'][$id]->new_topics) {
-        $variables['forums'][$id]->new_text = \Drupal::translation()->formatPlural($variables['forums'][$id]->new_topics, '1 new post<span class="visually-hidden"> in forum %title</span>', '@count new posts<span class="visually-hidden"> in forum %title</span>', array('%title' => $variables['forums'][$id]->label()));
+        $variables['forums'][$id]->new_text = \Drupal::translation()->formatPlural($variables['forums'][$id]->new_topics, '1 new post<span class="visually-hidden"> in forum %title</span>', '@count new posts<span class="visually-hidden"> in forum %title</span>', ['%title' => $variables['forums'][$id]->label()]);
         $variables['forums'][$id]->new_url = \Drupal::url('forum.page', ['taxonomy_term' => $forum->id()], ['fragment' => 'new']);
         $variables['forums'][$id]->icon_class = 'new';
         $variables['forums'][$id]->icon_title = t('New posts');
       }
       $variables['forums'][$id]->old_topics = $forum->num_topics - $variables['forums'][$id]->new_topics;
     }
-    $forum_submitted = array('#theme' => 'forum_submitted', '#topic' => $forum->last_post);
+    $forum_submitted = ['#theme' => 'forum_submitted', '#topic' => $forum->last_post];
     $variables['forums'][$id]->last_reply = drupal_render($forum_submitted);
   }
 
-  $variables['pager'] = array(
+  $variables['pager'] = [
    '#type' => 'pager',
-  );
+  ];
 
   // Give meaning to $tid for themers. $tid actually stands for term ID.
   $variables['forum_id'] = $variables['tid'];
@@ -635,7 +635,7 @@ function template_preprocess_forum_icon(&$variables) {
 function template_preprocess_forum_submitted(&$variables) {
   $variables['author'] = '';
   if (isset($variables['topic']->uid)) {
-    $username = array('#theme' => 'username', '#account' => User::load($variables['topic']->uid));
+    $username = ['#theme' => 'username', '#account' => User::load($variables['topic']->uid)];
     $variables['author'] = drupal_render($username);
   }
   $variables['time'] = isset($variables['topic']->created) ? \Drupal::service('date.formatter')->formatTimeDiffSince($variables['topic']->created) : '';
diff --git a/core/modules/forum/forum.views.inc b/core/modules/forum/forum.views.inc
index fa7174f0b29a45591425b908fedcfb85b3dc07fa..6f2425912b5d7b3b72cb3d597e57b578fce7106c 100644
--- a/core/modules/forum/forum.views.inc
+++ b/core/modules/forum/forum.views.inc
@@ -11,147 +11,147 @@
 function forum_views_data() {
 
   $data['forum_index']['table']['group'] = t('Forum');
-  $data['forum_index']['table']['base'] = array(
+  $data['forum_index']['table']['base'] = [
     'field' => 'nid',
     'title' => t('Forum content'),
     'access query tag' => 'node_access',
-  );
+  ];
 
-  $data['forum_index']['nid'] = array(
+  $data['forum_index']['nid'] = [
     'title' => t('Nid'),
     'help' => t('The content ID of the forum index entry.'),
-    'field' => array(
+    'field' => [
       'id' => 'numeric',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'numeric',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'numeric',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-    'relationship' => array(
+    ],
+    'relationship' => [
       'base' => 'node',
       'base field' => 'nid',
       'label' => t('Node'),
-    ),
-  );
+    ],
+  ];
 
-  $data['forum_index']['title'] = array(
+  $data['forum_index']['title'] = [
     'title' => t('Title'),
     'help' => t('The content title.'),
-    'field' => array(
+    'field' => [
       'id' => 'standard',
       'link_to_node default' => TRUE,
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'string',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'string',
-    ),
-  );
+    ],
+  ];
 
-  $data['forum_index']['tid'] = array(
+  $data['forum_index']['tid'] = [
     'title' => t('Has taxonomy term ID'),
     'help' => t('Display content if it has the selected taxonomy terms.'),
-    'argument' => array(
+    'argument' => [
       'id' => 'taxonomy_index_tid',
       'name table' => 'taxonomy_term_data',
       'name field' => 'name',
       'empty field name' => t('Uncategorized'),
       'numeric' => TRUE,
       'skip base' => 'taxonomy_term_data',
-    ),
-    'field' => array(
+    ],
+    'field' => [
       'id' => 'numeric',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'title' => t('Has taxonomy term'),
       'id' => 'taxonomy_index_tid',
       'hierarchy table' => 'taxonomy_term_hierarchy',
       'numeric' => TRUE,
       'skip base' => 'taxonomy_term_data',
       'allow empty' => TRUE,
-    ),
-    'relationship' => array(
+    ],
+    'relationship' => [
       'base' => 'taxonomy_term',
       'base field' => 'tid',
       'label' => t('Term'),
-    ),
-  );
+    ],
+  ];
 
 
-  $data['forum_index']['created'] = array(
+  $data['forum_index']['created'] = [
     'title' => t('Post date'),
     'help' => t('The date the content was posted.'),
-    'field' => array(
+    'field' => [
       'id' => 'date',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'date'
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'date',
-    ),
-  );
+    ],
+  ];
 
-  $data['forum_index']['sticky'] = array(
+  $data['forum_index']['sticky'] = [
     'title' => t('Sticky'),
     'help' => t('Whether or not the content is sticky.'),
-    'field' => array(
+    'field' => [
       'id' => 'boolean',
       'click sortable' => TRUE,
-      'output formats' => array(
-        'sticky' => array(t('Sticky'), t('Not sticky')),
-      ),
-    ),
-    'filter' => array(
+      'output formats' => [
+        'sticky' => [t('Sticky'), t('Not sticky')],
+      ],
+    ],
+    'filter' => [
       'id' => 'boolean',
       'label' => t('Sticky'),
       'type' => 'yes-no',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
       'help' => t('Whether or not the content is sticky. To list sticky content first, set this to descending.'),
-    ),
-  );
+    ],
+  ];
 
-  $data['forum_index']['last_comment_timestamp'] = array(
+  $data['forum_index']['last_comment_timestamp'] = [
     'title' => t('Last comment time'),
     'help' => t('Date and time of when the last comment was posted.'),
-    'field' => array(
+    'field' => [
       'id' => 'comment_last_timestamp',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'date',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'date',
-    ),
-  );
+    ],
+  ];
 
-  $data['forum_index']['comment_count'] = array(
+  $data['forum_index']['comment_count'] = [
     'title' => t('Comment count'),
     'help' => t('The number of comments a node has.'),
-    'field' => array(
+    'field' => [
       'id' => 'numeric',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'numeric',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
   return $data;
 }
diff --git a/core/modules/forum/src/Breadcrumb/ForumNodeBreadcrumbBuilder.php b/core/modules/forum/src/Breadcrumb/ForumNodeBreadcrumbBuilder.php
index 01e6c49a76818f72eb596af08a7e266d760cab4e..1a359010a85bd6e3d0bcdbc134f6c50060435399 100644
--- a/core/modules/forum/src/Breadcrumb/ForumNodeBreadcrumbBuilder.php
+++ b/core/modules/forum/src/Breadcrumb/ForumNodeBreadcrumbBuilder.php
@@ -32,9 +32,9 @@ public function build(RouteMatchInterface $route_match) {
       foreach ($parents as $parent) {
         $breadcrumb->addCacheableDependency($parent);
         $breadcrumb->addLink(Link::createFromRoute($parent->label(), 'forum.page',
-          array(
+          [
             'taxonomy_term' => $parent->id(),
-          )
+          ]
         ));
       }
     }
diff --git a/core/modules/forum/src/Controller/ForumController.php b/core/modules/forum/src/Controller/ForumController.php
index 0e3d99562df70f198ef2e113d7e94cbd51b75352..2348872b4773cec3cfb55591053cdae05273e7a8 100644
--- a/core/modules/forum/src/Controller/ForumController.php
+++ b/core/modules/forum/src/Controller/ForumController.php
@@ -207,9 +207,9 @@ public function forumIndex() {
    * @return array
    *   A render array.
    */
-  protected function build($forums, TermInterface $term, $topics = array(), $parents = array(), $header = array()) {
+  protected function build($forums, TermInterface $term, $topics = [], $parents = [], $header = []) {
     $config = $this->config('forum.settings');
-    $build = array(
+    $build = [
       '#theme' => 'forums',
       '#forums' => $forums,
       '#topics' => $topics,
@@ -218,9 +218,9 @@ protected function build($forums, TermInterface $term, $topics = array(), $paren
       '#term' => $term,
       '#sortby' => $config->get('topics.order'),
       '#forums_per_page' => $config->get('topics.page_limit'),
-    );
+    ];
     if (empty($term->forum_container->value)) {
-      $build['#attached']['feed'][] = array('taxonomy/term/' . $term->id() . '/feed', 'RSS - ' . $term->getName());
+      $build['#attached']['feed'][] = ['taxonomy/term/' . $term->id() . '/feed', 'RSS - ' . $term->getName()];
     }
     $this->renderer->addCacheableDependency($build, $config);
 
@@ -252,10 +252,10 @@ protected function build($forums, TermInterface $term, $topics = array(), $paren
    */
   public function addForum() {
     $vid = $this->config('forum.settings')->get('vocabulary');
-    $taxonomy_term = $this->termStorage->create(array(
+    $taxonomy_term = $this->termStorage->create([
       'vid' => $vid,
       'forum_controller' => 0,
-    ));
+    ]);
     return $this->entityFormBuilder()->getForm($taxonomy_term, 'forum');
   }
 
@@ -267,10 +267,10 @@ public function addForum() {
    */
   public function addContainer() {
     $vid = $this->config('forum.settings')->get('vocabulary');
-    $taxonomy_term = $this->termStorage->create(array(
+    $taxonomy_term = $this->termStorage->create([
       'vid' => $vid,
       'forum_container' => 1,
-    ));
+    ]);
     return $this->entityFormBuilder()->getForm($taxonomy_term, 'container');
   }
 
@@ -325,10 +325,10 @@ protected function buildActionLinks($vid, TermInterface $forum_term = NULL) {
         $links['login'] = [
           '#attributes' => ['class' => ['action-links']],
           '#theme' => 'menu_local_action',
-          '#link' => array(
+          '#link' => [
             'title' => $this->t('Log in to post new content in the forum.'),
             'url' => Url::fromRoute('user.login', [], ['query' => $this->getDestinationArray()]),
-          ),
+          ],
         ];
       }
     }
diff --git a/core/modules/forum/src/Form/DeleteForm.php b/core/modules/forum/src/Form/DeleteForm.php
index 752017367814f9ccb706bef677958ddca086a998..5b3666a843bd5cde9ae006c2659f476c5a4401dd 100644
--- a/core/modules/forum/src/Form/DeleteForm.php
+++ b/core/modules/forum/src/Form/DeleteForm.php
@@ -30,7 +30,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to delete the forum %label?', array('%label' => $this->taxonomyTerm->label()));
+    return $this->t('Are you sure you want to delete the forum %label?', ['%label' => $this->taxonomyTerm->label()]);
   }
 
   /**
@@ -61,8 +61,8 @@ public function buildForm(array $form, FormStateInterface $form_state, TermInter
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->taxonomyTerm->delete();
-    drupal_set_message($this->t('The forum %label and all sub-forums have been deleted.', array('%label' => $this->taxonomyTerm->label())));
-    $this->logger('forum')->notice('forum: deleted %label and all its sub-forums.', array('%label' => $this->taxonomyTerm->label()));
+    drupal_set_message($this->t('The forum %label and all sub-forums have been deleted.', ['%label' => $this->taxonomyTerm->label()]));
+    $this->logger('forum')->notice('forum: deleted %label and all its sub-forums.', ['%label' => $this->taxonomyTerm->label()]);
     $form_state->setRedirectUrl($this->getCancelUrl());
   }
 
diff --git a/core/modules/forum/src/Form/ForumForm.php b/core/modules/forum/src/Form/ForumForm.php
index 30f0cf1466e6d459cc7c4e40fe38ea2ef6fd534a..ed0a7683a5d389bfe21a96c38230f8c2388326f7 100644
--- a/core/modules/forum/src/Form/ForumForm.php
+++ b/core/modules/forum/src/Form/ForumForm.php
@@ -50,7 +50,7 @@ public function form(array $form, FormStateInterface $form_state) {
     $form['parent']['#tree'] = TRUE;
     $form['parent'][0] = $this->forumParentSelect($taxonomy_term->id(), $this->t('Parent'));
 
-    $form['#theme_wrappers'] = array('form__forum');
+    $form['#theme_wrappers'] = ['form__forum'];
     $this->forumFormType = $this->t('forum');
     return $form;
   }
@@ -62,7 +62,7 @@ public function buildEntity(array $form, FormStateInterface $form_state) {
     $term = parent::buildEntity($form, $form_state);
 
     // Assign parents from forum parent select field.
-    $term->parent = array($form_state->getValue(array('parent', 0)));
+    $term->parent = [$form_state->getValue(['parent', 0])];
 
     return $term;
   }
@@ -81,14 +81,14 @@ public function save(array $form, FormStateInterface $form_state) {
     $view_link = $term->link($term->getName());
     switch ($status) {
       case SAVED_NEW:
-        drupal_set_message($this->t('Created new @type %term.', array('%term' => $view_link, '@type' => $this->forumFormType)));
-        $this->logger('forum')->notice('Created new @type %term.', array('%term' => $term->getName(), '@type' => $this->forumFormType, 'link' => $link));
+        drupal_set_message($this->t('Created new @type %term.', ['%term' => $view_link, '@type' => $this->forumFormType]));
+        $this->logger('forum')->notice('Created new @type %term.', ['%term' => $term->getName(), '@type' => $this->forumFormType, 'link' => $link]);
         $form_state->setValue('tid', $term->id());
         break;
 
       case SAVED_UPDATED:
-        drupal_set_message($this->t('The @type %term has been updated.', array('%term' => $term->getName(), '@type' => $this->forumFormType)));
-        $this->logger('forum')->notice('Updated @type %term.', array('%term' => $term->getName(), '@type' => $this->forumFormType, 'link' => $link));
+        drupal_set_message($this->t('The @type %term has been updated.', ['%term' => $term->getName(), '@type' => $this->forumFormType]));
+        $this->logger('forum')->notice('Updated @type %term.', ['%term' => $term->getName(), '@type' => $this->forumFormType, 'link' => $link]);
         break;
     }
 
@@ -155,14 +155,14 @@ protected function forumParentSelect($tid, $title) {
 
     $description = $this->t('Forums may be placed at the top (root) level, or inside another container or forum.');
 
-    return array(
+    return [
       '#type' => 'select',
       '#title' => $title,
       '#default_value' => $parent,
       '#options' => $options,
       '#description' => $description,
       '#required' => TRUE,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/forum/src/Form/Overview.php b/core/modules/forum/src/Form/Overview.php
index ba9c033de723a053a747e20a807bda79c987e131..df6f94725a07c7033827586a299c38f893784d0d 100644
--- a/core/modules/forum/src/Form/Overview.php
+++ b/core/modules/forum/src/Form/Overview.php
@@ -80,10 +80,10 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     unset($form['actions']['reset_alphabetical']);
 
     // Use the existing taxonomy overview submit handler.
-    $form['terms']['#empty'] = $this->t('No containers or forums available. <a href=":container">Add container</a> or <a href=":forum">Add forum</a>.', array(
+    $form['terms']['#empty'] = $this->t('No containers or forums available. <a href=":container">Add container</a> or <a href=":forum">Add forum</a>.', [
       ':container' => $this->url('forum.add_container'),
       ':forum' => $this->url('forum.add_forum')
-    ));
+    ]);
     return $form;
   }
 
diff --git a/core/modules/forum/src/ForumIndexStorage.php b/core/modules/forum/src/ForumIndexStorage.php
index 35b2274b7e39071faa3e61d1c33f4ae23232705d..d644ca9fd4164b9864e2af6045d14c02e96ee4a7 100644
--- a/core/modules/forum/src/ForumIndexStorage.php
+++ b/core/modules/forum/src/ForumIndexStorage.php
@@ -31,7 +31,7 @@ function __construct(Connection $database) {
    * {@inheritdoc}
    */
   public function getOriginalTermId(NodeInterface $node) {
-    return $this->database->queryRange("SELECT f.tid FROM {forum} f INNER JOIN {node} n ON f.vid = n.vid WHERE n.nid = :nid ORDER BY f.vid DESC", 0, 1, array(':nid' => $node->id()))->fetchField();
+    return $this->database->queryRange("SELECT f.tid FROM {forum} f INNER JOIN {node} n ON f.vid = n.vid WHERE n.nid = :nid ORDER BY f.vid DESC", 0, 1, [':nid' => $node->id()])->fetchField();
   }
 
   /**
@@ -39,11 +39,11 @@ public function getOriginalTermId(NodeInterface $node) {
    */
   public function create(NodeInterface $node) {
     $this->database->insert('forum')
-      ->fields(array(
+      ->fields([
         'tid' => $node->forum_tid,
         'vid' => $node->getRevisionId(),
         'nid' => $node->id(),
-      ))
+      ])
       ->execute();
   }
 
@@ -52,7 +52,7 @@ public function create(NodeInterface $node) {
    */
   public function read(array $vids) {
     return $this->database->select('forum', 'f')
-      ->fields('f', array('nid', 'tid'))
+      ->fields('f', ['nid', 'tid'])
       ->condition('f.vid', $vids, 'IN')
       ->execute();
   }
@@ -81,7 +81,7 @@ public function deleteRevision(NodeInterface $node) {
    */
   public function update(NodeInterface $node) {
     $this->database->update('forum')
-      ->fields(array('tid' => $node->forum_tid))
+      ->fields(['tid' => $node->forum_tid])
       ->condition('vid', $node->getRevisionId())
       ->execute();
   }
@@ -91,22 +91,22 @@ public function update(NodeInterface $node) {
    */
   public function updateIndex(NodeInterface $node) {
     $nid = $node->id();
-    $count = $this->database->query("SELECT COUNT(cid) FROM {comment_field_data} c INNER JOIN {forum_index} i ON c.entity_id = i.nid WHERE c.entity_id = :nid AND c.field_name = 'comment_forum' AND c.entity_type = 'node' AND c.status = :status AND c.default_langcode = 1", array(
+    $count = $this->database->query("SELECT COUNT(cid) FROM {comment_field_data} c INNER JOIN {forum_index} i ON c.entity_id = i.nid WHERE c.entity_id = :nid AND c.field_name = 'comment_forum' AND c.entity_type = 'node' AND c.status = :status AND c.default_langcode = 1", [
       ':nid' => $nid,
       ':status' => CommentInterface::PUBLISHED,
-    ))->fetchField();
+    ])->fetchField();
 
     if ($count > 0) {
       // Comments exist.
-      $last_reply = $this->database->queryRange("SELECT cid, name, created, uid FROM {comment_field_data} WHERE entity_id = :nid AND field_name = 'comment_forum' AND entity_type = 'node' AND status = :status AND default_langcode = 1 ORDER BY cid DESC", 0, 1, array(
+      $last_reply = $this->database->queryRange("SELECT cid, name, created, uid FROM {comment_field_data} WHERE entity_id = :nid AND field_name = 'comment_forum' AND entity_type = 'node' AND status = :status AND default_langcode = 1 ORDER BY cid DESC", 0, 1, [
         ':nid' => $nid,
         ':status' => CommentInterface::PUBLISHED,
-      ))->fetchObject();
+      ])->fetchObject();
       $this->database->update('forum_index')
-        ->fields( array(
+        ->fields( [
           'comment_count' => $count,
           'last_comment_timestamp' => $last_reply->created,
-        ))
+        ])
         ->condition('nid', $nid)
         ->execute();
     }
@@ -114,10 +114,10 @@ public function updateIndex(NodeInterface $node) {
       // Comments do not exist.
       // @todo This should be actually filtering on the desired node language
       $this->database->update('forum_index')
-        ->fields( array(
+        ->fields( [
           'comment_count' => 0,
           'last_comment_timestamp' => $node->getCreatedTime(),
-        ))
+        ])
         ->condition('nid', $nid)
         ->execute();
     }
@@ -128,11 +128,11 @@ public function updateIndex(NodeInterface $node) {
    */
   public function createIndex(NodeInterface $node) {
     $query = $this->database->insert('forum_index')
-      ->fields(array('nid', 'title', 'tid', 'sticky', 'created', 'comment_count', 'last_comment_timestamp'));
+      ->fields(['nid', 'title', 'tid', 'sticky', 'created', 'comment_count', 'last_comment_timestamp']);
     foreach ($node->getTranslationLanguages() as $langcode => $language) {
       $translation = $node->getTranslation($langcode);
       foreach ($translation->taxonomy_forums as $item) {
-        $query->values(array(
+        $query->values([
           'nid' => $node->id(),
           'title' => $translation->label(),
           'tid' => $item->target_id,
@@ -140,7 +140,7 @@ public function createIndex(NodeInterface $node) {
           'created' => $node->getCreatedTime(),
           'comment_count' => 0,
           'last_comment_timestamp' => $node->getCreatedTime(),
-        ));
+        ]);
       }
     }
     $query->execute();
diff --git a/core/modules/forum/src/ForumManager.php b/core/modules/forum/src/ForumManager.php
index 9fe49a84138bd8ba7b5010daad261980c901e7be..05cd86076070b3955cf54122acd247a2b0d8caaf 100644
--- a/core/modules/forum/src/ForumManager.php
+++ b/core/modules/forum/src/ForumManager.php
@@ -75,28 +75,28 @@ class ForumManager implements ForumManagerInterface {
    *
    * @var array
    */
-  protected $lastPostData = array();
+  protected $lastPostData = [];
 
   /**
    * Array of forum statistics keyed by forum (term) id.
    *
    * @var array
    */
-  protected $forumStatistics = array();
+  protected $forumStatistics = [];
 
   /**
    * Array of forum children keyed by parent forum (term) id.
    *
    * @var array
    */
-  protected $forumChildren = array();
+  protected $forumChildren = [];
 
   /**
    * Array of history keyed by nid.
    *
    * @var array
    */
-  protected $history = array();
+  protected $history = [];
 
   /**
    * Cached forum index.
@@ -135,11 +135,11 @@ public function getTopics($tid, AccountInterface $account) {
     $forum_per_page = $config->get('topics.page_limit');
     $sortby = $config->get('topics.order');
 
-    $header = array(
-      array('data' => $this->t('Topic'), 'field' => 'f.title'),
-      array('data' => $this->t('Replies'), 'field' => 'f.comment_count'),
-      array('data' => $this->t('Last reply'), 'field' => 'f.last_comment_timestamp'),
-    );
+    $header = [
+      ['data' => $this->t('Topic'), 'field' => 'f.title'],
+      ['data' => $this->t('Replies'), 'field' => 'f.comment_count'],
+      ['data' => $this->t('Last reply'), 'field' => 'f.last_comment_timestamp'],
+    ];
 
     $order = $this->getTopicOrder($sortby);
     for ($i = 0; $i < count($header); $i++) {
@@ -168,7 +168,7 @@ public function getTopics($tid, AccountInterface $account) {
 
     $query->setCountQuery($count_query);
     $result = $query->execute();
-    $nids = array();
+    $nids = [];
     foreach ($result as $record) {
       $nids[] = $record->nid;
     }
@@ -177,15 +177,15 @@ public function getTopics($tid, AccountInterface $account) {
 
       $query = $this->connection->select('node_field_data', 'n')
         ->extend('Drupal\Core\Database\Query\TableSortExtender');
-      $query->fields('n', array('nid'));
+      $query->fields('n', ['nid']);
 
       $query->join('comment_entity_statistics', 'ces', "n.nid = ces.entity_id AND ces.field_name = 'comment_forum' AND ces.entity_type = 'node'");
-      $query->fields('ces', array(
+      $query->fields('ces', [
         'cid',
         'last_comment_uid',
         'last_comment_timestamp',
         'comment_count'
-      ));
+      ]);
 
       $query->join('forum_index', 'f', 'f.nid = n.nid');
       $query->addField('f', 'tid', 'forum_tid');
@@ -205,7 +205,7 @@ public function getTopics($tid, AccountInterface $account) {
         //   and just fall back to the default language.
         ->condition('n.default_langcode', 1);
 
-      $result = array();
+      $result = [];
       foreach ($query->execute() as $row) {
         $topic = $nodes[$row->nid];
         $topic->comment_mode = $topic->comment_forum->status;
@@ -217,10 +217,10 @@ public function getTopics($tid, AccountInterface $account) {
       }
     }
     else {
-      $result = array();
+      $result = [];
     }
 
-    $topics = array();
+    $topics = [];
     $first_new_found = FALSE;
     foreach ($result as $topic) {
       if ($account->isAuthenticated()) {
@@ -258,7 +258,7 @@ public function getTopics($tid, AccountInterface $account) {
       $topics[$topic->id()] = $topic;
     }
 
-    return array('topics' => $topics, 'header' => $header);
+    return ['topics' => $topics, 'header' => $header];
 
   }
 
@@ -280,16 +280,16 @@ public function getTopics($tid, AccountInterface $account) {
   protected function getTopicOrder($sortby) {
     switch ($sortby) {
       case static::NEWEST_FIRST:
-        return array('field' => 'f.last_comment_timestamp', 'sort' => 'desc');
+        return ['field' => 'f.last_comment_timestamp', 'sort' => 'desc'];
 
       case static::OLDEST_FIRST:
-        return array('field' => 'f.last_comment_timestamp', 'sort' => 'asc');
+        return ['field' => 'f.last_comment_timestamp', 'sort' => 'asc'];
 
       case static::MOST_POPULAR_FIRST:
-        return array('field' => 'f.comment_count', 'sort' => 'desc');
+        return ['field' => 'f.comment_count', 'sort' => 'desc'];
 
       case static::LEAST_POPULAR_FIRST:
-        return array('field' => 'f.comment_count', 'sort' => 'asc');
+        return ['field' => 'f.comment_count', 'sort' => 'asc'];
 
     }
   }
@@ -309,7 +309,7 @@ protected function getTopicOrder($sortby) {
   protected function lastVisit($nid, AccountInterface $account) {
     if (empty($this->history[$nid])) {
       $result = $this->connection->select('history', 'h')
-        ->fields('h', array('nid', 'timestamp'))
+        ->fields('h', ['nid', 'timestamp'])
         ->condition('uid', $account->id())
         ->execute();
       foreach ($result as $t) {
@@ -334,13 +334,13 @@ protected function getLastPost($tid) {
     }
     // Query "Last Post" information for this forum.
     $query = $this->connection->select('node_field_data', 'n');
-    $query->join('forum', 'f', 'n.vid = f.vid AND f.tid = :tid', array(':tid' => $tid));
+    $query->join('forum', 'f', 'n.vid = f.vid AND f.tid = :tid', [':tid' => $tid]);
     $query->join('comment_entity_statistics', 'ces', "n.nid = ces.entity_id AND ces.field_name = 'comment_forum' AND ces.entity_type = 'node'");
     $query->join('users_field_data', 'u', 'ces.last_comment_uid = u.uid AND u.default_langcode = 1');
     $query->addExpression('CASE ces.last_comment_uid WHEN 0 THEN ces.last_comment_name ELSE u.name END', 'last_comment_name');
 
     $topic = $query
-      ->fields('ces', array('last_comment_timestamp', 'last_comment_uid'))
+      ->fields('ces', ['last_comment_timestamp', 'last_comment_uid'])
       ->condition('n.status', 1)
       ->orderBy('last_comment_timestamp', 'DESC')
       ->range(0, 1)
@@ -378,7 +378,7 @@ protected function getForumStatistics($tid) {
       $query->addExpression('COUNT(n.nid)', 'topic_count');
       $query->addExpression('SUM(ces.comment_count)', 'comment_count');
       $this->forumStatistics = $query
-        ->fields('f', array('tid'))
+        ->fields('f', ['tid'])
         ->condition('n.status', 1)
         ->condition('n.default_langcode', 1)
         ->groupBy('tid')
@@ -399,7 +399,7 @@ public function getChildren($vid, $tid) {
     if (!empty($this->forumChildren[$tid])) {
       return $this->forumChildren[$tid];
     }
-    $forums = array();
+    $forums = [];
     $_forums = $this->entityManager->getStorage('taxonomy_term')->loadTree($vid, $tid, NULL, TRUE);
     foreach ($_forums as $forum) {
       // Merge in the topic and post counters.
@@ -430,13 +430,13 @@ public function getIndex() {
     }
 
     $vid = $this->configFactory->get('forum.settings')->get('vocabulary');
-    $index = $this->entityManager->getStorage('taxonomy_term')->create(array(
+    $index = $this->entityManager->getStorage('taxonomy_term')->create([
       'tid' => 0,
       'container' => 1,
-      'parents' => array(),
+      'parents' => [],
       'isIndex' => TRUE,
       'vid' => $vid
-    ));
+    ]);
 
     // Load the tree below.
     $index->forums = $this->getChildren($vid, 0);
@@ -451,7 +451,7 @@ public function resetCache() {
     // Reset the index.
     $this->index = NULL;
     // Reset history.
-    $this->history = array();
+    $this->history = [];
   }
 
   /**
@@ -475,8 +475,8 @@ public function checkNodeType(NodeInterface $node) {
    */
   public function unreadTopics($term, $uid) {
     $query = $this->connection->select('node_field_data', 'n');
-    $query->join('forum', 'f', 'n.vid = f.vid AND f.tid = :tid', array(':tid' => $term));
-    $query->leftJoin('history', 'h', 'n.nid = h.nid AND h.uid = :uid', array(':uid' => $uid));
+    $query->join('forum', 'f', 'n.vid = f.vid AND f.tid = :tid', [':tid' => $term]);
+    $query->leftJoin('history', 'h', 'n.nid = h.nid AND h.uid = :uid', [':uid' => $uid]);
     $query->addExpression('COUNT(n.nid)', 'count');
     return $query
       ->condition('status', 1)
@@ -506,10 +506,10 @@ public function __sleep() {
   public function __wakeup() {
     $this->defaultWakeup();
     // Initialize static cache.
-    $this->history = array();
-    $this->lastPostData = array();
-    $this->forumChildren = array();
-    $this->forumStatistics = array();
+    $this->history = [];
+    $this->lastPostData = [];
+    $this->forumChildren = [];
+    $this->forumStatistics = [];
     $this->index = NULL;
   }
 
diff --git a/core/modules/forum/src/ForumSettingsForm.php b/core/modules/forum/src/ForumSettingsForm.php
index ac9b325cf255b2517b63bc932d333bb56f14134f..12bb551ffa054e2b9f0c72a0d6f8d8f570c24666 100644
--- a/core/modules/forum/src/ForumSettingsForm.php
+++ b/core/modules/forum/src/ForumSettingsForm.php
@@ -30,35 +30,35 @@ protected function getEditableConfigNames() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('forum.settings');
 
-    $options = array(5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 80, 100, 150, 200, 250, 300, 350, 400, 500);
-    $form['forum_hot_topic'] = array(
+    $options = [5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 80, 100, 150, 200, 250, 300, 350, 400, 500];
+    $form['forum_hot_topic'] = [
       '#type' => 'select',
       '#title' => $this->t('Hot topic threshold'),
       '#default_value' => $config->get('topics.hot_threshold'),
       '#options' => array_combine($options, $options),
       '#description' => $this->t('The number of replies a topic must have to be considered "hot".'),
-    );
-    $options = array(10, 25, 50, 75, 100);
-    $form['forum_per_page'] = array(
+    ];
+    $options = [10, 25, 50, 75, 100];
+    $form['forum_per_page'] = [
       '#type' => 'select',
       '#title' => $this->t('Topics per page'),
       '#default_value' => $config->get('topics.page_limit'),
       '#options' => array_combine($options, $options),
       '#description' => $this->t('Default number of forum topics displayed per page.'),
-    );
-    $forder = array(
+    ];
+    $forder = [
       1 => $this->t('Date - newest first'),
       2 => $this->t('Date - oldest first'),
       3 => $this->t('Posts - most active first'),
       4 => $this->t('Posts - least active first')
-    );
-    $form['forum_order'] = array(
+    ];
+    $form['forum_order'] = [
       '#type' => 'radios',
       '#title' => $this->t('Default order'),
       '#default_value' => $config->get('topics.order'),
       '#options' => $forder,
       '#description' => $this->t('Default display order for topics.'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/forum/src/Plugin/Block/ForumBlockBase.php b/core/modules/forum/src/Plugin/Block/ForumBlockBase.php
index e65f1df940effa362931c629b10258a8204c0823..8095ceffb8e05fea514cf7d7fc47fbd08070d284 100644
--- a/core/modules/forum/src/Plugin/Block/ForumBlockBase.php
+++ b/core/modules/forum/src/Plugin/Block/ForumBlockBase.php
@@ -19,14 +19,14 @@ abstract class ForumBlockBase extends BlockBase {
    */
   public function build() {
     $result = $this->buildForumQuery()->execute();
-    $elements = array();
+    $elements = [];
     if ($node_title_list = node_title_list($result)) {
       $elements['forum_list'] = $node_title_list;
-      $elements['forum_more'] = array(
+      $elements['forum_more'] = [
         '#type' => 'more_link',
         '#url' => Url::fromRoute('forum.index'),
-        '#attributes' => array('title' => $this->t('Read the latest forum topics.')),
-      );
+        '#attributes' => ['title' => $this->t('Read the latest forum topics.')],
+      ];
     }
     return $elements;
   }
@@ -43,12 +43,12 @@ abstract protected function buildForumQuery();
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
-      'properties' => array(
+    return [
+      'properties' => [
         'administrative' => TRUE,
-      ),
+      ],
       'block_count' => 5,
-    );
+    ];
   }
 
   /**
@@ -63,12 +63,12 @@ protected function blockAccess(AccountInterface $account) {
    */
   public function blockForm($form, FormStateInterface $form_state) {
     $range = range(2, 20);
-    $form['block_count'] = array(
+    $form['block_count'] = [
       '#type' => 'select',
       '#title' => $this->t('Number of topics'),
       '#default_value' => $this->configuration['block_count'],
       '#options' => array_combine($range, $range),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/forum/src/Plugin/Validation/Constraint/ForumLeafConstraintValidator.php b/core/modules/forum/src/Plugin/Validation/Constraint/ForumLeafConstraintValidator.php
index 761dc0f72772135cdee3f301e406b7f4c5098691..95603d8446b0e503970c5b9fd8046bb378a08564 100644
--- a/core/modules/forum/src/Plugin/Validation/Constraint/ForumLeafConstraintValidator.php
+++ b/core/modules/forum/src/Plugin/Validation/Constraint/ForumLeafConstraintValidator.php
@@ -26,7 +26,7 @@ public function validate($items, Constraint $constraint) {
 
     // The forum_container flag must not be set.
     if (!empty($item->entity->forum_container->value)) {
-      $this->context->addViolation($constraint->noLeafMessage, array('%forum' => $item->entity->getName()));
+      $this->context->addViolation($constraint->noLeafMessage, ['%forum' => $item->entity->getName()]);
     }
   }
 
diff --git a/core/modules/forum/src/Tests/Views/ForumIntegrationTest.php b/core/modules/forum/src/Tests/Views/ForumIntegrationTest.php
index 99ed94569f44cba3f2b03abaf58762525237cd97..f5677e41b6a9314c17cab7ed095826889403ffd2 100644
--- a/core/modules/forum/src/Tests/Views/ForumIntegrationTest.php
+++ b/core/modules/forum/src/Tests/Views/ForumIntegrationTest.php
@@ -19,19 +19,19 @@ class ForumIntegrationTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('forum_test_views');
+  public static $modules = ['forum_test_views'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_forum_index');
+  public static $testViews = ['test_forum_index'];
 
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('forum_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['forum_test_views']);
   }
 
 
@@ -41,25 +41,25 @@ protected function setUp() {
   public function testForumIntegration() {
     // Create a forum.
     $entity_manager = $this->container->get('entity.manager');
-    $term = $entity_manager->getStorage('taxonomy_term')->create(array('vid' => 'forums', 'name' => $this->randomMachineName()));
+    $term = $entity_manager->getStorage('taxonomy_term')->create(['vid' => 'forums', 'name' => $this->randomMachineName()]);
     $term->save();
 
     $comment_storage = $entity_manager->getStorage('comment');
 
     // Create some nodes which are part of this forum with some comments.
-    $nodes = array();
+    $nodes = [];
     for ($i = 0; $i < 3; $i++) {
       $node = $this->drupalCreateNode(['type' => 'forum', 'taxonomy_forums' => [$term->id()], 'sticky' => $i == 0 ? NodeInterface::STICKY : NodeInterface::NOT_STICKY]);
       $nodes[] = $node;
     }
 
-    $account = $this->drupalCreateUser(array('skip comment approval'));
+    $account = $this->drupalCreateUser(['skip comment approval']);
     $this->drupalLogin($account);
 
-    $comments = array();
+    $comments = [];
     foreach ($nodes as $index => $node) {
       for ($i = 0; $i <= $index; $i++) {
-        $comment = $comment_storage->create(array('entity_type' => 'node', 'entity_id' => $node->id(), 'field_name' => 'comment_forum'));
+        $comment = $comment_storage->create(['entity_type' => 'node', 'entity_id' => $node->id(), 'field_name' => 'comment_forum']);
         $comment->save();
         $comments[$comment->get('entity_id')->target_id][$comment->id()] = $comment;
       }
@@ -68,27 +68,27 @@ public function testForumIntegration() {
     $view = Views::getView('test_forum_index');
     $this->executeView($view);
 
-    $expected_result = array();
-    $expected_result[] = array(
+    $expected_result = [];
+    $expected_result[] = [
       'nid' => $nodes[0]->id(),
       'sticky' => NodeInterface::STICKY,
       'comment_count' => 1.
-    );
-    $expected_result[] = array(
+    ];
+    $expected_result[] = [
       'nid' => $nodes[1]->id(),
       'sticky' => NodeInterface::NOT_STICKY,
       'comment_count' => 2.
-    );
-    $expected_result[] = array(
+    ];
+    $expected_result[] = [
       'nid' => $nodes[2]->id(),
       'sticky' => NodeInterface::NOT_STICKY,
       'comment_count' => 3.
-    );
-    $column_map = array(
+    ];
+    $column_map = [
       'nid' => 'nid',
       'forum_index_sticky' => 'sticky',
       'forum_index_comment_count' => 'comment_count',
-    );
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $column_map);
   }
 
diff --git a/core/modules/forum/tests/src/Functional/ForumBlockTest.php b/core/modules/forum/tests/src/Functional/ForumBlockTest.php
index 0c426027c7b3fb3a6b4d5386dc6550411ab60dcf..6c412b71cdc9299916d448908f13230d7094d276 100644
--- a/core/modules/forum/tests/src/Functional/ForumBlockTest.php
+++ b/core/modules/forum/tests/src/Functional/ForumBlockTest.php
@@ -18,7 +18,7 @@ class ForumBlockTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('forum', 'block');
+  public static $modules = ['forum', 'block'];
 
   /**
    * A user with various administrative privileges.
@@ -29,14 +29,14 @@ protected function setUp() {
     parent::setUp();
 
     // Create users.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'access administration pages',
       'administer blocks',
       'administer nodes',
       'create forum content',
       'post comments',
       'skip comment approval',
-    ));
+    ]);
   }
 
   /**
@@ -58,7 +58,7 @@ public function testNewForumTopicsBlock() {
 
     // We expect all 5 forum topics to appear in the "New forum topics" block.
     foreach ($topics as $topic) {
-      $this->assertLink($topic, 0, format_string('Forum topic @topic found in the "New forum topics" block.', array('@topic' => $topic)));
+      $this->assertLink($topic, 0, format_string('Forum topic @topic found in the "New forum topics" block.', ['@topic' => $topic]));
     }
 
     // Configure the new forum topics block to only show 2 topics.
@@ -69,11 +69,11 @@ public function testNewForumTopicsBlock() {
     // We expect only the 2 most recent forum topics to appear in the "New forum
     // topics" block.
     for ($index = 0; $index < 5; $index++) {
-      if (in_array($index, array(3, 4))) {
-        $this->assertLink($topics[$index], 0, format_string('Forum topic @topic found in the "New forum topics" block.', array('@topic' => $topics[$index])));
+      if (in_array($index, [3, 4])) {
+        $this->assertLink($topics[$index], 0, format_string('Forum topic @topic found in the "New forum topics" block.', ['@topic' => $topics[$index]]));
       }
       else {
-        $this->assertNoText($topics[$index], format_string('Forum topic @topic not found in the "New forum topics" block.', array('@topic' => $topics[$index])));
+        $this->assertNoText($topics[$index], format_string('Forum topic @topic not found in the "New forum topics" block.', ['@topic' => $topics[$index]]));
       }
     }
   }
@@ -93,7 +93,7 @@ public function testActiveForumTopicsBlock() {
       // Get the node from the topic title.
       $node = $this->drupalGetNodeByTitle($topics[$index]);
       $date->modify('+1 minute');
-      $comment = Comment::create(array(
+      $comment = Comment::create([
         'entity_id' => $node->id(),
         'field_name' => 'comment_forum',
         'entity_type' => 'node',
@@ -101,7 +101,7 @@ public function testActiveForumTopicsBlock() {
         'subject' => $this->randomString(20),
         'comment_body' => $this->randomString(256),
         'created' => $date->getTimestamp(),
-      ));
+      ]);
       $comment->save();
     }
 
@@ -116,10 +116,10 @@ public function testActiveForumTopicsBlock() {
     $this->drupalGet('<front>');
     for ($index = 0; $index < 10; $index++) {
       if ($index < 5) {
-        $this->assertLink($topics[$index], 0, format_string('Forum topic @topic found in the "Active forum topics" block.', array('@topic' => $topics[$index])));
+        $this->assertLink($topics[$index], 0, format_string('Forum topic @topic found in the "Active forum topics" block.', ['@topic' => $topics[$index]]));
       }
       else {
-        $this->assertNoText($topics[$index], format_string('Forum topic @topic not found in the "Active forum topics" block.', array('@topic' => $topics[$index])));
+        $this->assertNoText($topics[$index], format_string('Forum topic @topic not found in the "Active forum topics" block.', ['@topic' => $topics[$index]]));
       }
     }
 
@@ -132,7 +132,7 @@ public function testActiveForumTopicsBlock() {
     // We expect only the 2 forum topics with most recent comments to appear in
     // the "Active forum topics" block.
     for ($index = 0; $index < 10; $index++) {
-      if (in_array($index, array(3, 4))) {
+      if (in_array($index, [3, 4])) {
         $this->assertLink($topics[$index], 0, 'Forum topic found in the "Active forum topics" block.');
       }
       else {
@@ -148,7 +148,7 @@ public function testActiveForumTopicsBlock() {
    *   The title of the newly generated topic.
    */
   protected function createForumTopics($count = 5) {
-    $topics = array();
+    $topics = [];
     $date = new DrupalDateTime();
     $date->modify('-24 hours');
 
@@ -160,17 +160,17 @@ protected function createForumTopics($count = 5) {
       // changing the date.
       $date->modify('+1 minute');
 
-      $edit = array(
+      $edit = [
         'title[0][value]' => $title,
         'body[0][value]' => $body,
         // Forum posts are ordered by timestamp, so force a unique timestamp by
         // adding the index.
         'created[0][value][date]' => $date->format('Y-m-d'),
         'created[0][value][time]' => $date->format('H:i:s'),
-      );
+      ];
 
       // Create the forum topic, preselecting the forum ID via a URL parameter.
-      $this->drupalPostForm('node/add/forum', $edit, t('Save and publish'), array('query' => array('forum_id' => 1)));
+      $this->drupalPostForm('node/add/forum', $edit, t('Save and publish'), ['query' => ['forum_id' => 1]]);
       $topics[] = $title;
     }
 
diff --git a/core/modules/forum/tests/src/Functional/ForumIndexTest.php b/core/modules/forum/tests/src/Functional/ForumIndexTest.php
index 8bcb4822c900caa309e62c233b0fce54b77d60ff..3fd74b6fce7cfa45a8373c180949faf043682cdf 100644
--- a/core/modules/forum/tests/src/Functional/ForumIndexTest.php
+++ b/core/modules/forum/tests/src/Functional/ForumIndexTest.php
@@ -16,7 +16,7 @@ class ForumIndexTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'comment', 'forum');
+  public static $modules = ['taxonomy', 'comment', 'forum'];
 
   protected function setUp() {
     parent::setUp();
@@ -35,15 +35,15 @@ function testForumIndexStatus() {
 
     // Create a test node.
     $title = $this->randomMachineName(20);
-    $edit = array(
+    $edit = [
       'title[0][value]' => $title,
       'body[0][value]' => $this->randomMachineName(200),
-    );
+    ];
 
     // Create the forum topic, preselecting the forum ID via a URL parameter.
     $this->drupalGet("forum/$tid");
-    $this->clickLink(t('Add new @node_type', array('@node_type' => 'Forum topic')));
-    $this->assertUrl('node/add/forum', array('query' => array('forum_id' => $tid)));
+    $this->clickLink(t('Add new @node_type', ['@node_type' => 'Forum topic']));
+    $this->assertUrl('node/add/forum', ['query' => ['forum_id' => $tid]]);
     $this->drupalPostForm(NULL, $edit, t('Save and publish'));
 
     // Check that the node exists in the database.
@@ -51,11 +51,11 @@ function testForumIndexStatus() {
     $this->assertTrue(!empty($node), 'New forum node found in database.');
 
     // Create a child forum.
-    $edit = array(
+    $edit = [
       'name[0][value]' => $this->randomMachineName(20),
       'description[0][value]' => $this->randomMachineName(200),
       'parent[0]' => $tid,
-    );
+    ];
     $this->drupalPostForm('admin/structure/forum/add/forum', $edit, t('Save'));
     $tid_child = $tid + 1;
 
@@ -71,7 +71,7 @@ function testForumIndexStatus() {
 
 
     // Unpublish the node.
-    $this->drupalPostForm('node/' . $node->id() . '/edit', array(), t('Save and unpublish'));
+    $this->drupalPostForm('node/' . $node->id() . '/edit', [], t('Save and unpublish'));
     $this->drupalGet('node/' . $node->id());
     $this->assertText(t('Access denied'), 'Unpublished node is no longer accessible.');
 
diff --git a/core/modules/forum/tests/src/Functional/ForumNodeAccessTest.php b/core/modules/forum/tests/src/Functional/ForumNodeAccessTest.php
index 59a11921d653370b77131abb44af57450764f3bd..83523e681dce260ba3b83ee391add8ec56486da2 100644
--- a/core/modules/forum/tests/src/Functional/ForumNodeAccessTest.php
+++ b/core/modules/forum/tests/src/Functional/ForumNodeAccessTest.php
@@ -17,7 +17,7 @@ class ForumNodeAccessTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'comment', 'forum', 'taxonomy', 'tracker', 'node_access_test', 'block');
+  public static $modules = ['node', 'comment', 'forum', 'taxonomy', 'tracker', 'node_access_test', 'block'];
 
   protected function setUp() {
     parent::setUp();
@@ -34,30 +34,30 @@ protected function setUp() {
    */
   function testForumNodeAccess() {
     // Create some users.
-    $access_user = $this->drupalCreateUser(array('node test view'));
+    $access_user = $this->drupalCreateUser(['node test view']);
     $no_access_user = $this->drupalCreateUser();
-    $admin_user = $this->drupalCreateUser(array('access administration pages', 'administer modules', 'administer blocks', 'create forum content'));
+    $admin_user = $this->drupalCreateUser(['access administration pages', 'administer modules', 'administer blocks', 'create forum content']);
 
     $this->drupalLogin($admin_user);
 
     // Create a private node.
     $private_node_title = $this->randomMachineName(20);
-    $edit = array(
+    $edit = [
       'title[0][value]' => $private_node_title,
       'body[0][value]' => $this->randomMachineName(200),
       'private[0][value]' => TRUE,
-    );
-    $this->drupalPostForm('node/add/forum', $edit, t('Save'), array('query' => array('forum_id' => 1)));
+    ];
+    $this->drupalPostForm('node/add/forum', $edit, t('Save'), ['query' => ['forum_id' => 1]]);
     $private_node = $this->drupalGetNodeByTitle($private_node_title);
     $this->assertTrue(!empty($private_node), 'New private forum node found in database.');
 
     // Create a public node.
     $public_node_title = $this->randomMachineName(20);
-    $edit = array(
+    $edit = [
       'title[0][value]' => $public_node_title,
       'body[0][value]' => $this->randomMachineName(200),
-    );
-    $this->drupalPostForm('node/add/forum', $edit, t('Save'), array('query' => array('forum_id' => 1)));
+    ];
+    $this->drupalPostForm('node/add/forum', $edit, t('Save'), ['query' => ['forum_id' => 1]]);
     $public_node = $this->drupalGetNodeByTitle($public_node_title);
     $this->assertTrue(!empty($public_node), 'New public forum node found in database.');
 
diff --git a/core/modules/forum/tests/src/Functional/ForumTest.php b/core/modules/forum/tests/src/Functional/ForumTest.php
index 067e2bc5b166c934cc3c569b2b3b08a7514bfe9b..25ecc9df4c5a8cc647f004f3a02fcc5583e1b62c 100644
--- a/core/modules/forum/tests/src/Functional/ForumTest.php
+++ b/core/modules/forum/tests/src/Functional/ForumTest.php
@@ -25,7 +25,7 @@ class ForumTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'comment', 'forum', 'node', 'block', 'menu_ui', 'help');
+  public static $modules = ['taxonomy', 'comment', 'forum', 'node', 'block', 'menu_ui', 'help'];
 
   /**
    * A user with various administrative privileges.
@@ -81,7 +81,7 @@ protected function setUp() {
     $this->drupalPlaceBlock('page_title_block');
 
     // Create users.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'access administration pages',
       'administer modules',
       'administer blocks',
@@ -90,27 +90,27 @@ protected function setUp() {
       'administer taxonomy',
       'create forum content',
       'access comments',
-    ));
-    $this->editAnyTopicsUser = $this->drupalCreateUser(array(
+    ]);
+    $this->editAnyTopicsUser = $this->drupalCreateUser([
       'access administration pages',
       'create forum content',
       'edit any forum content',
       'delete any forum content',
-    ));
-    $this->editOwnTopicsUser = $this->drupalCreateUser(array(
+    ]);
+    $this->editOwnTopicsUser = $this->drupalCreateUser([
       'create forum content',
       'edit own forum content',
       'delete own forum content',
-    ));
+    ]);
     $this->webUser = $this->drupalCreateUser();
-    $this->postCommentUser = $this->drupalCreateUser(array(
+    $this->postCommentUser = $this->drupalCreateUser([
       'administer content types',
       'create forum content',
       'post comments',
       'skip comment approval',
       'access comments',
-    ));
-    $this->drupalPlaceBlock('help_block', array('region' => 'help'));
+    ]);
+    $this->drupalPlaceBlock('help_block', ['region' => 'help']);
     $this->drupalPlaceBlock('local_actions_block');
   }
 
@@ -188,7 +188,7 @@ function testForum() {
     $this->drupalGet('forum');
 
     // Verify row for testing forum.
-    $forum_arg = array(':forum' => 'forum-list-' . $this->forum['tid']);
+    $forum_arg = [':forum' => 'forum-list-' . $this->forum['tid']];
 
     // Topics cell contains number of topics and number of unread topics.
     $xpath = $this->buildXPathQuery('//tr[@id=:forum]//td[@class="forum__topics"]', $forum_arg);
@@ -210,15 +210,15 @@ function testForum() {
     $this->assertEquals('6', $elements[0]->getText(), 'Number of posts found.');
 
     // Test loading multiple forum nodes on the front page.
-    $this->drupalLogin($this->drupalCreateUser(array('administer content types', 'create forum content', 'post comments')));
-    $this->drupalPostForm('admin/structure/types/manage/forum', array('options[promote]' => 'promote'), t('Save content type'));
+    $this->drupalLogin($this->drupalCreateUser(['administer content types', 'create forum content', 'post comments']));
+    $this->drupalPostForm('admin/structure/types/manage/forum', ['options[promote]' => 'promote'], t('Save content type'));
     $this->createForumTopic($this->forum, FALSE);
     $this->createForumTopic($this->forum, FALSE);
     $this->drupalGet('node');
 
     // Test adding a comment to a forum topic.
     $node = $this->createForumTopic($this->forum, FALSE);
-    $edit = array();
+    $edit = [];
     $edit['comment_body[0][value]'] = $this->randomMachineName();
     $this->drupalPostForm('node/' . $node->id(), $edit, t('Save'));
     $this->assertResponse(200);
@@ -226,7 +226,7 @@ function testForum() {
     // Test editing a forum topic that has a comment.
     $this->drupalLogin($this->editAnyTopicsUser);
     $this->drupalGet('forum/' . $this->forum['tid']);
-    $this->drupalPostForm('node/' . $node->id() . '/edit', array(), t('Save'));
+    $this->drupalPostForm('node/' . $node->id() . '/edit', [], t('Save'));
     $this->assertResponse(200);
 
     // Test the root forum page title change.
@@ -260,7 +260,7 @@ function testAddOrphanTopic() {
     entity_delete_multiple('taxonomy_term', $tids);
 
     // Create an orphan forum item.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(10);
     $edit['body[0][value]'] = $this->randomMachineName(120);
     $this->drupalLogin($this->adminUser);
@@ -270,7 +270,7 @@ function testAddOrphanTopic() {
     $this->assertEqual(0, $nid_count, 'A forum node was not created when missing a forum vocabulary.');
 
     // Reset the defaults for future tests.
-    \Drupal::service('module_installer')->install(array('forum'));
+    \Drupal::service('module_installer')->install(['forum']);
   }
 
   /**
@@ -284,7 +284,7 @@ private function doAdminTests($user) {
     $this->drupalLogin($user);
 
     // Add forum to the Tools menu.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('admin/structure/menu/manage/tools', $edit, t('Save'));
     $this->assertResponse(200);
 
@@ -313,7 +313,7 @@ private function doAdminTests($user) {
     // Create second forum in container, destined to be deleted below.
     $delete_forum = $this->createForum('forum', $this->forumContainer['tid']);
     // Save forum overview.
-    $this->drupalPostForm('admin/structure/forum/', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/forum/', [], t('Save'));
     $this->assertRaw(t('The configuration options have been saved.'));
     // Delete this second forum.
     $this->deleteForum($delete_forum['tid']);
@@ -362,15 +362,15 @@ function editForumVocabulary() {
     $original_vocabulary = Vocabulary::load($vid);
 
     // Generate a random name and description.
-    $edit = array(
+    $edit = [
       'name' => $this->randomMachineName(10),
       'description' => $this->randomMachineName(100),
-    );
+    ];
 
     // Edit the vocabulary.
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $original_vocabulary->id(), $edit, t('Save'));
     $this->assertResponse(200);
-    $this->assertRaw(t('Updated vocabulary %name.', array('%name' => $edit['name'])), 'Vocabulary was edited');
+    $this->assertRaw(t('Updated vocabulary %name.', ['%name' => $edit['name']]), 'Vocabulary was edited');
 
     // Grab the newly edited vocabulary.
     $current_vocabulary = Vocabulary::load($vid);
@@ -404,12 +404,12 @@ function createForum($type, $parent = 0) {
     $name = $this->randomMachineName(10);
     $description = $this->randomMachineName(100);
 
-    $edit = array(
+    $edit = [
       'name[0][value]' => $name,
       'description[0][value]' => $description,
       'parent[0]' => $parent,
       'weight' => '0',
-    );
+    ];
 
     // Create forum.
     $this->drupalPostForm('admin/structure/forum/add/' . $type, $edit, t('Save'));
@@ -418,22 +418,22 @@ function createForum($type, $parent = 0) {
     $this->assertText(
       t(
         'Created new @type @term.',
-        array('@term' => $name, '@type' => t($type))
+        ['@term' => $name, '@type' => t($type)]
       ),
-      format_string('@type was created', array('@type' => ucfirst($type)))
+      format_string('@type was created', ['@type' => ucfirst($type)])
     );
 
     // Verify that the creation message contains a link to a term.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'term/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'term/']);
     $this->assert(isset($view_link), 'The message area contains a link to a term');
 
     // Verify forum.
-    $term = db_query("SELECT * FROM {taxonomy_term_field_data} t WHERE t.vid = :vid AND t.name = :name AND t.description__value = :desc AND t.default_langcode = 1", array(':vid' => $this->config('forum.settings')->get('vocabulary'), ':name' => $name, ':desc' => $description))->fetchAssoc();
+    $term = db_query("SELECT * FROM {taxonomy_term_field_data} t WHERE t.vid = :vid AND t.name = :name AND t.description__value = :desc AND t.default_langcode = 1", [':vid' => $this->config('forum.settings')->get('vocabulary'), ':name' => $name, ':desc' => $description])->fetchAssoc();
     $this->assertTrue(!empty($term), 'The ' . $type . ' exists in the database');
 
     // Verify forum hierarchy.
     $tid = $term['tid'];
-    $parent_tid = db_query("SELECT t.parent FROM {taxonomy_term_hierarchy} t WHERE t.tid = :tid", array(':tid' => $tid))->fetchField();
+    $parent_tid = db_query("SELECT t.parent FROM {taxonomy_term_hierarchy} t WHERE t.tid = :tid", [':tid' => $tid])->fetchField();
     $this->assertTrue($parent == $parent_tid, 'The ' . $type . ' is linked to its container');
 
     $forum = $this->container->get('entity.manager')->getStorage('taxonomy_term')->load($tid);
@@ -454,7 +454,7 @@ function deleteForum($tid) {
     $this->assertText('Are you sure you want to delete the forum');
     $this->assertNoText('Add forum');
     $this->assertNoText('Add forum container');
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
 
     // Assert that the forum no longer exists.
     $this->drupalGet('forum/' . $tid);
@@ -496,7 +496,7 @@ function testForumWithNewPost() {
     // Log in as a second user.
     $this->drupalLogin($this->postCommentUser);
     // Post a reply to the topic.
-    $edit = array();
+    $edit = [];
     $edit['subject[0][value]'] = $this->randomMachineName();
     $edit['comment_body[0][value]'] = $this->randomMachineName();
     $this->drupalPostForm('node/' . $node->id(), $edit, t('Save'));
@@ -533,33 +533,33 @@ function createForumTopic($forum, $container = FALSE) {
     $title = $this->randomMachineName(20);
     $body = $this->randomMachineName(200);
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => $title,
       'body[0][value]' => $body,
-    );
+    ];
     $tid = $forum['tid'];
 
     // Create the forum topic, preselecting the forum ID via a URL parameter.
-    $this->drupalPostForm('node/add/forum', $edit, t('Save'), array('query' => array('forum_id' => $tid)));
+    $this->drupalPostForm('node/add/forum', $edit, t('Save'), ['query' => ['forum_id' => $tid]]);
 
     $type = t('Forum topic');
     if ($container) {
-      $this->assertNoText(t('@type @title has been created.', array('@type' => $type, '@title' => $title)), 'Forum topic was not created');
-      $this->assertRaw(t('The item %title is a forum container, not a forum.', array('%title' => $forum['name'])), 'Error message was shown');
+      $this->assertNoText(t('@type @title has been created.', ['@type' => $type, '@title' => $title]), 'Forum topic was not created');
+      $this->assertRaw(t('The item %title is a forum container, not a forum.', ['%title' => $forum['name']]), 'Error message was shown');
       return;
     }
     else {
-      $this->assertText(t('@type @title has been created.', array('@type' => $type, '@title' => $title)), 'Forum topic was created');
-      $this->assertNoRaw(t('The item %title is a forum container, not a forum.', array('%title' => $forum['name'])), 'No error message was shown');
+      $this->assertText(t('@type @title has been created.', ['@type' => $type, '@title' => $title]), 'Forum topic was created');
+      $this->assertNoRaw(t('The item %title is a forum container, not a forum.', ['%title' => $forum['name']]), 'No error message was shown');
 
       // Verify that the creation message contains a link to a term.
-      $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'term/'));
+      $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'term/']);
       $this->assert(isset($view_link), 'The message area contains a link to a term');
     }
 
     // Retrieve node object, ensure that the topic was created and in the proper forum.
     $node = $this->drupalGetNodeByTitle($title);
-    $this->assertTrue($node != NULL, format_string('Node @title was loaded', array('@title' => $title)));
+    $this->assertTrue($node != NULL, format_string('Node @title was loaded', ['@title' => $title]));
     $this->assertEqual($node->taxonomy_forums->target_id, $tid, 'Saved forum topic was in the expected forum');
 
     // View forum topic.
@@ -602,16 +602,16 @@ private function verifyForums(EntityInterface $node, $admin, $response = 200) {
     $this->drupalGet('node/' . $node->id());
     $this->assertResponse(200);
     $this->assertTitle($node->label() . ' | Drupal', 'Forum node was displayed');
-    $breadcrumb_build = array(
+    $breadcrumb_build = [
       Link::createFromRoute(t('Home'), '<front>'),
       Link::createFromRoute(t('Forums'), 'forum.index'),
-      Link::createFromRoute($this->forumContainer['name'], 'forum.page', array('taxonomy_term' => $this->forumContainer['tid'])),
-      Link::createFromRoute($this->forum['name'], 'forum.page', array('taxonomy_term' => $this->forum['tid'])),
-    );
-    $breadcrumb = array(
+      Link::createFromRoute($this->forumContainer['name'], 'forum.page', ['taxonomy_term' => $this->forumContainer['tid']]),
+      Link::createFromRoute($this->forum['name'], 'forum.page', ['taxonomy_term' => $this->forum['tid']]),
+    ];
+    $breadcrumb = [
       '#theme' => 'breadcrumb',
       '#links' => $breadcrumb_build,
-    );
+    ];
     $this->assertRaw(\Drupal::service('renderer')->renderRoot($breadcrumb), 'Breadcrumbs were displayed');
 
     // View forum edit node.
@@ -623,26 +623,26 @@ private function verifyForums(EntityInterface $node, $admin, $response = 200) {
 
     if ($response == 200) {
       // Edit forum node (including moving it to another forum).
-      $edit = array();
+      $edit = [];
       $edit['title[0][value]'] = 'node/' . $node->id();
       $edit['body[0][value]'] = $this->randomMachineName(256);
       // Assume the topic is initially associated with $forum.
       $edit['taxonomy_forums'] = $this->rootForum['tid'];
       $edit['shadow'] = TRUE;
       $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
-      $this->assertText(t('Forum topic @title has been updated.', array('@title' => $edit['title[0][value]'])), 'Forum node was edited');
+      $this->assertText(t('Forum topic @title has been updated.', ['@title' => $edit['title[0][value]']]), 'Forum node was edited');
 
       // Verify topic was moved to a different forum.
-      $forum_tid = db_query("SELECT tid FROM {forum} WHERE nid = :nid AND vid = :vid", array(
+      $forum_tid = db_query("SELECT tid FROM {forum} WHERE nid = :nid AND vid = :vid", [
         ':nid' => $node->id(),
         ':vid' => $node->getRevisionId(),
-      ))->fetchField();
+      ])->fetchField();
       $this->assertTrue($forum_tid == $this->rootForum['tid'], 'The forum topic is linked to a different forum');
 
       // Delete forum node.
-      $this->drupalPostForm('node/' . $node->id() . '/delete', array(), t('Delete'));
+      $this->drupalPostForm('node/' . $node->id() . '/delete', [], t('Delete'));
       $this->assertResponse($response);
-      $this->assertRaw(t('Forum topic %title has been deleted.', array('%title' => $edit['title[0][value]'])), 'Forum node was deleted');
+      $this->assertRaw(t('Forum topic %title has been deleted.', ['%title' => $edit['title[0][value]']]), 'Forum node was deleted');
     }
   }
 
@@ -660,18 +660,18 @@ private function verifyForumView($forum, $parent = NULL) {
     $this->assertResponse(200);
     $this->assertTitle($forum['name'] . ' | Drupal');
 
-    $breadcrumb_build = array(
+    $breadcrumb_build = [
       Link::createFromRoute(t('Home'), '<front>'),
       Link::createFromRoute(t('Forums'), 'forum.index'),
-    );
+    ];
     if (isset($parent)) {
-      $breadcrumb_build[] = Link::createFromRoute($parent['name'], 'forum.page', array('taxonomy_term' => $parent['tid']));
+      $breadcrumb_build[] = Link::createFromRoute($parent['name'], 'forum.page', ['taxonomy_term' => $parent['tid']]);
     }
 
-    $breadcrumb = array(
+    $breadcrumb = [
       '#theme' => 'breadcrumb',
       '#links' => $breadcrumb_build,
-    );
+    ];
     $this->assertRaw(\Drupal::service('renderer')->renderRoot($breadcrumb), 'Breadcrumbs were displayed');
   }
 
@@ -679,7 +679,7 @@ private function verifyForumView($forum, $parent = NULL) {
    * Generates forum topics.
    */
   private function generateForumTopics() {
-    $this->nids = array();
+    $this->nids = [];
     for ($i = 0; $i < 5; $i++) {
       $node = $this->createForumTopic($this->forum, FALSE);
       $this->nids[] = $node->id();
diff --git a/core/modules/forum/tests/src/Functional/ForumUninstallTest.php b/core/modules/forum/tests/src/Functional/ForumUninstallTest.php
index 65038e9d90aa806963d936802b4521d0b7ba6ec1..c2d3848ffcaf29a5b2939aedc0964199bdd07424 100644
--- a/core/modules/forum/tests/src/Functional/ForumUninstallTest.php
+++ b/core/modules/forum/tests/src/Functional/ForumUninstallTest.php
@@ -21,7 +21,7 @@ class ForumUninstallTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('forum');
+  public static $modules = ['forum'];
 
   /**
    * Tests if forum module uninstallation properly deletes the field.
@@ -37,21 +37,21 @@ public function testForumUninstallWithField() {
       'name' => t('A term'),
       'langcode' => \Drupal::languageManager()->getDefaultLanguage()->getId(),
       'description' => '',
-      'parent' => array(0),
+      'parent' => [0],
       'vid' => 'forums',
       'forum_container' => 0,
     ]);
     $term->save();
 
     // Create a forum node.
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'title' => 'A forum post',
       'type' => 'forum',
-      'taxonomy_forums' => array(array('target_id' => $term->id())),
-    ));
+      'taxonomy_forums' => [['target_id' => $term->id()]],
+    ]);
 
     // Create at least one comment against the forum node.
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'entity_id' => $node->nid->value,
       'entity_type' => 'node',
       'field_name' => 'comment_forum',
@@ -60,7 +60,7 @@ public function testForumUninstallWithField() {
       'status' => CommentInterface::PUBLISHED,
       'subject' => $this->randomMachineName(),
       'hostname' => '127.0.0.1',
-    ));
+    ]);
     $comment->save();
 
     // Attempt to uninstall forum.
@@ -70,7 +70,7 @@ public function testForumUninstallWithField() {
     $this->assertText('To uninstall Forum, first delete all Forum content');
 
     // Delete the node.
-    $this->drupalPostForm('node/' . $node->id() . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('node/' . $node->id() . '/delete', [], t('Delete'));
 
     // Attempt to uninstall forum.
     $this->drupalGet('admin/modules/uninstall');
@@ -93,9 +93,9 @@ public function testForumUninstallWithField() {
     $this->drupalGet('admin/modules/uninstall');
     // Assert forum is no longer required.
     $this->assertFieldByName('uninstall[forum]');
-    $this->drupalPostForm('admin/modules/uninstall', array(
+    $this->drupalPostForm('admin/modules/uninstall', [
       'uninstall[forum]' => 1,
-    ), t('Uninstall'));
+    ], t('Uninstall'));
     $this->drupalPostForm(NULL, [], t('Uninstall'));
 
     // Check that the field is now deleted.
@@ -104,16 +104,16 @@ public function testForumUninstallWithField() {
 
     // Check that a node type with a machine name of forum can be created after
     // uninstalling the forum module and the node type is not locked.
-    $edit = array(
+    $edit = [
       'name' => 'Forum',
       'title_label' => 'title for forum',
       'type' => 'forum',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/add', $edit, t('Save content type'));
     $this->assertTrue((bool) NodeType::load('forum'), 'Node type with machine forum created.');
     $this->drupalGet('admin/structure/types/manage/forum');
     $this->clickLink(t('Delete'));
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     $this->assertResponse(200);
     $this->assertFalse((bool) NodeType::load('forum'), 'Node type with machine forum deleted.');
 
@@ -137,14 +137,14 @@ public function testForumUninstallWithoutFieldStorage() {
 
     // Delete all terms in the Forums vocabulary. Uninstalling the forum module
     // will fail unless this is done.
-    $terms = entity_load_multiple_by_properties('taxonomy_term', array('vid' => 'forums'));
+    $terms = entity_load_multiple_by_properties('taxonomy_term', ['vid' => 'forums']);
     foreach ($terms as $term) {
       $term->delete();
     }
 
     // Ensure that uninstallation succeeds even if the field has already been
     // deleted manually beforehand.
-    $this->container->get('module_installer')->uninstall(array('forum'));
+    $this->container->get('module_installer')->uninstall(['forum']);
   }
 
 }
diff --git a/core/modules/forum/tests/src/Kernel/Migrate/d6/MigrateForumConfigsTest.php b/core/modules/forum/tests/src/Kernel/Migrate/d6/MigrateForumConfigsTest.php
index b0964a78747011654949b5172c81fd0e60bc8408..bc0a9ffe972d3871085999ad32daaf8905f85e73 100644
--- a/core/modules/forum/tests/src/Kernel/Migrate/d6/MigrateForumConfigsTest.php
+++ b/core/modules/forum/tests/src/Kernel/Migrate/d6/MigrateForumConfigsTest.php
@@ -17,7 +17,7 @@ class MigrateForumConfigsTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('comment', 'forum', 'taxonomy');
+  public static $modules = ['comment', 'forum', 'taxonomy'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/forum/tests/src/Unit/Breadcrumb/ForumBreadcrumbBuilderBaseTest.php b/core/modules/forum/tests/src/Unit/Breadcrumb/ForumBreadcrumbBuilderBaseTest.php
index 8001e579461a22cfa6c12cb2d6aaa42af658b0a6..abc11227edb73a58ab972676c1bdfaba2679202b 100644
--- a/core/modules/forum/tests/src/Unit/Breadcrumb/ForumBreadcrumbBuilderBaseTest.php
+++ b/core/modules/forum/tests/src/Unit/Breadcrumb/ForumBreadcrumbBuilderBaseTest.php
@@ -37,9 +37,9 @@ public function testConstructor() {
     // Make some test doubles.
     $entity_manager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
     $config_factory = $this->getConfigFactoryStub(
-      array(
-        'forum.settings' => array('IAmATestKey' => 'IAmATestValue'),
-      )
+      [
+        'forum.settings' => ['IAmATestKey' => 'IAmATestValue'],
+      ]
     );
     $forum_manager = $this->getMock('Drupal\forum\ForumManagerInterface');
     $translation_manager = $this->getMock('Drupal\Core\StringTranslation\TranslationInterface');
@@ -48,20 +48,20 @@ public function testConstructor() {
     $builder = $this->getMockForAbstractClass(
       'Drupal\forum\Breadcrumb\ForumBreadcrumbBuilderBase',
       // Constructor array.
-      array(
+      [
         $entity_manager,
         $config_factory,
         $forum_manager,
         $translation_manager,
-      )
+      ]
     );
 
     // Reflect upon our properties, except for config which is a special case.
-    $property_names = array(
+    $property_names = [
       'entityManager' => $entity_manager,
       'forumManager' => $forum_manager,
       'stringTranslation' => $translation_manager,
-    );
+    ];
     foreach ($property_names as $property_name => $property_value) {
       $this->assertAttributeEquals(
         $property_value, $property_name, $builder
@@ -103,37 +103,37 @@ public function testBuild() {
     $vocab_storage = $this->getMock('Drupal\Core\Entity\EntityStorageInterface');
     $vocab_storage->expects($this->any())
       ->method('load')
-      ->will($this->returnValueMap(array(
-        array('forums', $prophecy->reveal()),
-      )));
+      ->will($this->returnValueMap([
+        ['forums', $prophecy->reveal()],
+      ]));
 
     $entity_manager = $this->getMockBuilder('Drupal\Core\Entity\EntityManagerInterface')
       ->disableOriginalConstructor()
       ->getMock();
     $entity_manager->expects($this->any())
       ->method('getStorage')
-      ->will($this->returnValueMap(array(
-        array('taxonomy_vocabulary', $vocab_storage),
-      )));
+      ->will($this->returnValueMap([
+        ['taxonomy_vocabulary', $vocab_storage],
+      ]));
 
     $config_factory = $this->getConfigFactoryStub(
-      array(
-        'forum.settings' => array(
+      [
+        'forum.settings' => [
           'vocabulary' => 'forums',
-        ),
-      )
+        ],
+      ]
     );
 
     // Build a breadcrumb builder to test.
     $breadcrumb_builder = $this->getMockForAbstractClass(
       'Drupal\forum\Breadcrumb\ForumBreadcrumbBuilderBase',
       // Constructor array.
-      array(
+      [
         $entity_manager,
         $config_factory,
         $forum_manager,
         $translation_manager,
-      )
+      ]
     );
 
     // Add a translation manager for t().
@@ -144,10 +144,10 @@ public function testBuild() {
     $route_match = $this->getMock('Drupal\Core\Routing\RouteMatchInterface');
 
     // Expected result set.
-    $expected = array(
+    $expected = [
       Link::createFromRoute('Home', '<front>'),
       Link::createFromRoute('Fora_is_the_plural_of_forum', 'forum.index'),
-    );
+    ];
 
     // And finally, the test.
     $breadcrumb = $breadcrumb_builder->build($route_match);
diff --git a/core/modules/forum/tests/src/Unit/Breadcrumb/ForumListingBreadcrumbBuilderTest.php b/core/modules/forum/tests/src/Unit/Breadcrumb/ForumListingBreadcrumbBuilderTest.php
index 4e5a6c4579b1ad864ba746639982170efd9d8c98..45566f2afe6d1f849060f808bf34e87354a83315 100644
--- a/core/modules/forum/tests/src/Unit/Breadcrumb/ForumListingBreadcrumbBuilderTest.php
+++ b/core/modules/forum/tests/src/Unit/Breadcrumb/ForumListingBreadcrumbBuilderTest.php
@@ -41,21 +41,21 @@ protected function setUp() {
    * @dataProvider providerTestApplies
    * @covers ::applies
    */
-  public function testApplies($expected, $route_name = NULL, $parameter_map = array()) {
+  public function testApplies($expected, $route_name = NULL, $parameter_map = []) {
     // Make some test doubles.
     $entity_manager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
-    $config_factory = $this->getConfigFactoryStub(array());
+    $config_factory = $this->getConfigFactoryStub([]);
     $forum_manager = $this->getMock('Drupal\forum\ForumManagerInterface');
     $translation_manager = $this->getMock('Drupal\Core\StringTranslation\TranslationInterface');
 
     // Make an object to test.
     $builder = $this->getMockBuilder('Drupal\forum\Breadcrumb\ForumListingBreadcrumbBuilder')
-      ->setConstructorArgs(array(
+      ->setConstructorArgs([
         $entity_manager,
         $config_factory,
         $forum_manager,
         $translation_manager,
-      ))
+      ])
       ->setMethods(NULL)
       ->getMock();
 
@@ -84,29 +84,29 @@ public function providerTestApplies() {
       ->disableOriginalConstructor()
       ->getMock();
 
-    return array(
-      array(
+    return [
+      [
         FALSE,
-      ),
-      array(
+      ],
+      [
         FALSE,
         'NOT.forum.page',
-      ),
-      array(
+      ],
+      [
         FALSE,
         'forum.page',
-      ),
-      array(
+      ],
+      [
         TRUE,
         'forum.page',
-        array(array('taxonomy_term', 'anything')),
-      ),
-      array(
+        [['taxonomy_term', 'anything']],
+      ],
+      [
         TRUE,
         'forum.page',
-        array(array('taxonomy_term', $mock_term)),
-      ),
-    );
+        [['taxonomy_term', $mock_term]],
+      ],
+    ];
   }
 
   /**
@@ -141,10 +141,10 @@ public function testBuild() {
     $forum_manager = $this->getMock('Drupal\forum\ForumManagerInterface');
     $forum_manager->expects($this->at(0))
       ->method('getParents')
-      ->will($this->returnValue(array($term1)));
+      ->will($this->returnValue([$term1]));
     $forum_manager->expects($this->at(1))
       ->method('getParents')
-      ->will($this->returnValue(array($term1, $term2)));
+      ->will($this->returnValue([$term1, $term2]));
 
     // The root forum.
     $prophecy = $this->prophesize('Drupal\taxonomy\VocabularyInterface');
@@ -156,35 +156,35 @@ public function testBuild() {
     $vocab_storage = $this->getMock('Drupal\Core\Entity\EntityStorageInterface');
     $vocab_storage->expects($this->any())
       ->method('load')
-      ->will($this->returnValueMap(array(
-        array('forums', $prophecy->reveal()),
-      )));
+      ->will($this->returnValueMap([
+        ['forums', $prophecy->reveal()],
+      ]));
 
     $entity_manager = $this->getMockBuilder('Drupal\Core\Entity\EntityManagerInterface')
       ->disableOriginalConstructor()
       ->getMock();
     $entity_manager->expects($this->any())
       ->method('getStorage')
-      ->will($this->returnValueMap(array(
-        array('taxonomy_vocabulary', $vocab_storage),
-      )));
+      ->will($this->returnValueMap([
+        ['taxonomy_vocabulary', $vocab_storage],
+      ]));
 
     $config_factory = $this->getConfigFactoryStub(
-      array(
-        'forum.settings' => array(
+      [
+        'forum.settings' => [
           'vocabulary' => 'forums',
-        ),
-      )
+        ],
+      ]
     );
 
     // Build a breadcrumb builder to test.
     $breadcrumb_builder = $this->getMock(
-      'Drupal\forum\Breadcrumb\ForumListingBreadcrumbBuilder', NULL, array(
+      'Drupal\forum\Breadcrumb\ForumListingBreadcrumbBuilder', NULL, [
         $entity_manager,
         $config_factory,
         $forum_manager,
         $translation_manager,
-      )
+      ]
     );
 
     // Add a translation manager for t().
@@ -208,11 +208,11 @@ public function testBuild() {
       ->will($this->returnValue($forum_listing));
 
     // First test.
-    $expected1 = array(
+    $expected1 = [
       Link::createFromRoute('Home', '<front>'),
       Link::createFromRoute('Fora_is_the_plural_of_forum', 'forum.index'),
-      Link::createFromRoute('Something', 'forum.page', array('taxonomy_term' => 1)),
-    );
+      Link::createFromRoute('Something', 'forum.page', ['taxonomy_term' => 1]),
+    ];
     $breadcrumb = $breadcrumb_builder->build($route_match);
     $this->assertEquals($expected1, $breadcrumb->getLinks());
     $this->assertEquals(['route'], $breadcrumb->getCacheContexts());
@@ -220,12 +220,12 @@ public function testBuild() {
     $this->assertEquals(Cache::PERMANENT, $breadcrumb->getCacheMaxAge());
 
     // Second test.
-    $expected2 = array(
+    $expected2 = [
       Link::createFromRoute('Home', '<front>'),
       Link::createFromRoute('Fora_is_the_plural_of_forum', 'forum.index'),
-      Link::createFromRoute('Something else', 'forum.page', array('taxonomy_term' => 2)),
-      Link::createFromRoute('Something', 'forum.page', array('taxonomy_term' => 1)),
-    );
+      Link::createFromRoute('Something else', 'forum.page', ['taxonomy_term' => 2]),
+      Link::createFromRoute('Something', 'forum.page', ['taxonomy_term' => 1]),
+    ];
     $breadcrumb = $breadcrumb_builder->build($route_match);
     $this->assertEquals($expected2, $breadcrumb->getLinks());
     $this->assertEquals(['route'], $breadcrumb->getCacheContexts());
diff --git a/core/modules/forum/tests/src/Unit/Breadcrumb/ForumNodeBreadcrumbBuilderTest.php b/core/modules/forum/tests/src/Unit/Breadcrumb/ForumNodeBreadcrumbBuilderTest.php
index 1998ffa2a190b231cd73500f9e011984d9eac321..f4d3797155d028e09139fc8c70a484ea0125232c 100644
--- a/core/modules/forum/tests/src/Unit/Breadcrumb/ForumNodeBreadcrumbBuilderTest.php
+++ b/core/modules/forum/tests/src/Unit/Breadcrumb/ForumNodeBreadcrumbBuilderTest.php
@@ -41,10 +41,10 @@ protected function setUp() {
    * @dataProvider providerTestApplies
    * @covers ::applies
    */
-  public function testApplies($expected, $route_name = NULL, $parameter_map = array()) {
+  public function testApplies($expected, $route_name = NULL, $parameter_map = []) {
     // Make some test doubles.
     $entity_manager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
-    $config_factory = $this->getConfigFactoryStub(array());
+    $config_factory = $this->getConfigFactoryStub([]);
 
     $forum_manager = $this->getMock('Drupal\forum\ForumManagerInterface');
     $forum_manager->expects($this->any())
@@ -56,12 +56,12 @@ public function testApplies($expected, $route_name = NULL, $parameter_map = arra
     // Make an object to test.
     $builder = $this->getMockBuilder('Drupal\forum\Breadcrumb\ForumNodeBreadcrumbBuilder')
       ->setConstructorArgs(
-        array(
+        [
           $entity_manager,
           $config_factory,
           $forum_manager,
           $translation_manager,
-        )
+        ]
       )
       ->setMethods(NULL)
       ->getMock();
@@ -93,29 +93,29 @@ public function providerTestApplies() {
       ->disableOriginalConstructor()
       ->getMock();
 
-    return array(
-      array(
+    return [
+      [
         FALSE,
-      ),
-      array(
+      ],
+      [
         FALSE,
         'NOT.entity.node.canonical',
-      ),
-      array(
+      ],
+      [
         FALSE,
         'entity.node.canonical',
-      ),
-      array(
+      ],
+      [
         FALSE,
         'entity.node.canonical',
-        array(array('node', NULL)),
-      ),
-      array(
+        [['node', NULL]],
+      ],
+      [
         TRUE,
         'entity.node.canonical',
-        array(array('node', $mock_node)),
-      ),
-    );
+        [['node', $mock_node]],
+      ],
+    ];
   }
 
   /**
@@ -151,10 +151,10 @@ public function testBuild() {
       ->getMock();
     $forum_manager->expects($this->at(0))
       ->method('getParents')
-      ->will($this->returnValue(array($term1)));
+      ->will($this->returnValue([$term1]));
     $forum_manager->expects($this->at(1))
       ->method('getParents')
-      ->will($this->returnValue(array($term1, $term2)));
+      ->will($this->returnValue([$term1, $term2]));
 
     $prophecy = $this->prophesize('Drupal\taxonomy\VocabularyInterface');
     $prophecy->label()->willReturn('Forums');
@@ -165,35 +165,35 @@ public function testBuild() {
     $vocab_storage = $this->getMock('Drupal\Core\Entity\EntityStorageInterface');
     $vocab_storage->expects($this->any())
       ->method('load')
-      ->will($this->returnValueMap(array(
-        array('forums', $prophecy->reveal()),
-      )));
+      ->will($this->returnValueMap([
+        ['forums', $prophecy->reveal()],
+      ]));
 
     $entity_manager = $this->getMockBuilder('Drupal\Core\Entity\EntityManagerInterface')
       ->disableOriginalConstructor()
       ->getMock();
     $entity_manager->expects($this->any())
       ->method('getStorage')
-      ->will($this->returnValueMap(array(
-        array('taxonomy_vocabulary', $vocab_storage),
-      )));
+      ->will($this->returnValueMap([
+        ['taxonomy_vocabulary', $vocab_storage],
+      ]));
 
     $config_factory = $this->getConfigFactoryStub(
-      array(
-        'forum.settings' => array(
+      [
+        'forum.settings' => [
           'vocabulary' => 'forums',
-        ),
-      )
+        ],
+      ]
     );
 
     // Build a breadcrumb builder to test.
     $breadcrumb_builder = $this->getMock(
-      'Drupal\forum\Breadcrumb\ForumNodeBreadcrumbBuilder', NULL, array(
+      'Drupal\forum\Breadcrumb\ForumNodeBreadcrumbBuilder', NULL, [
         $entity_manager,
         $config_factory,
         $forum_manager,
         $translation_manager,
-      )
+      ]
     );
 
     // Add a translation manager for t().
@@ -215,11 +215,11 @@ public function testBuild() {
       ->will($this->returnValue($forum_node));
 
     // First test.
-    $expected1 = array(
+    $expected1 = [
       Link::createFromRoute('Home', '<front>'),
       Link::createFromRoute('Forums', 'forum.index'),
-      Link::createFromRoute('Something', 'forum.page', array('taxonomy_term' => 1)),
-    );
+      Link::createFromRoute('Something', 'forum.page', ['taxonomy_term' => 1]),
+    ];
     $breadcrumb = $breadcrumb_builder->build($route_match);
     $this->assertEquals($expected1, $breadcrumb->getLinks());
     $this->assertEquals(['route'], $breadcrumb->getCacheContexts());
@@ -227,12 +227,12 @@ public function testBuild() {
     $this->assertEquals(Cache::PERMANENT, $breadcrumb->getCacheMaxAge());
 
     // Second test.
-    $expected2 = array(
+    $expected2 = [
       Link::createFromRoute('Home', '<front>'),
       Link::createFromRoute('Forums', 'forum.index'),
-      Link::createFromRoute('Something else', 'forum.page', array('taxonomy_term' => 2)),
-      Link::createFromRoute('Something', 'forum.page', array('taxonomy_term' => 1)),
-    );
+      Link::createFromRoute('Something else', 'forum.page', ['taxonomy_term' => 2]),
+      Link::createFromRoute('Something', 'forum.page', ['taxonomy_term' => 1]),
+    ];
     $breadcrumb = $breadcrumb_builder->build($route_match);
     $this->assertEquals($expected2, $breadcrumb->getLinks());
     $this->assertEquals(['route'], $breadcrumb->getCacheContexts());
diff --git a/core/modules/forum/tests/src/Unit/ForumManagerTest.php b/core/modules/forum/tests/src/Unit/ForumManagerTest.php
index 587355694719612821ef457790563fe0fd343eb5..ad59092138e88c040132d42e362ecf25dbb73e8c 100644
--- a/core/modules/forum/tests/src/Unit/ForumManagerTest.php
+++ b/core/modules/forum/tests/src/Unit/ForumManagerTest.php
@@ -57,17 +57,17 @@ public function testGetIndex() {
       ->disableOriginalConstructor()
       ->getMock();
 
-    $manager = $this->getMock('\Drupal\forum\ForumManager', array('getChildren'), array(
+    $manager = $this->getMock('\Drupal\forum\ForumManager', ['getChildren'], [
       $config_factory,
       $entity_manager,
       $connection,
       $translation_manager,
       $comment_manager,
-    ));
+    ]);
 
     $manager->expects($this->once())
       ->method('getChildren')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     // Get the index once.
     $index1 = $manager->getIndex();
diff --git a/core/modules/hal/hal.api.php b/core/modules/hal/hal.api.php
index c1e3480fb6ab7eedf3d5bf977406d9cce6224afe..197785cbc3904ed5a7d8ab40e4d5508216140f79 100644
--- a/core/modules/hal/hal.api.php
+++ b/core/modules/hal/hal.api.php
@@ -26,7 +26,7 @@
  * @see \Symfony\Component\Serializer\NormalizerInterface::normalize()
  * @see \Symfony\Component\Serializer\DenormalizerInterface::denormalize()
  */
-function hook_hal_type_uri_alter(&$uri, $context = array()) {
+function hook_hal_type_uri_alter(&$uri, $context = []) {
   if ($context['mymodule'] == TRUE) {
     $base = \Drupal::config('hal.settings')->get('link_domain');
     $uri = str_replace($base, 'http://mymodule.domain', $uri);
@@ -50,7 +50,7 @@ function hook_hal_type_uri_alter(&$uri, $context = array()) {
  * @see \Symfony\Component\Serializer\NormalizerInterface::normalize()
  * @see \Symfony\Component\Serializer\DenormalizerInterface::denormalize()
  */
-function hook_hal_relation_uri_alter(&$uri, $context = array()) {
+function hook_hal_relation_uri_alter(&$uri, $context = []) {
   if ($context['mymodule'] == TRUE) {
     $base = \Drupal::config('hal.settings')->get('link_domain');
     $uri = str_replace($base, 'http://mymodule.domain', $uri);
diff --git a/core/modules/hal/hal.module b/core/modules/hal/hal.module
index eaf06c104f65da68f1113c35bf733f8af58678aa..0833e477588abdfe562ae829ef8f280b754b323a 100644
--- a/core/modules/hal/hal.module
+++ b/core/modules/hal/hal.module
@@ -15,9 +15,9 @@ function hal_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.hal':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('<a href=":hal_spec">Hypertext Application Language (HAL)</a> is a format that supports the linking required for hypermedia APIs.', array(':hal_spec' => 'http://stateless.co/hal_specification.html')) . '</p>';
+      $output .= '<p>' . t('<a href=":hal_spec">Hypertext Application Language (HAL)</a> is a format that supports the linking required for hypermedia APIs.', [':hal_spec' => 'http://stateless.co/hal_specification.html']) . '</p>';
       $output .= '<p>' . t('Hypermedia APIs are a style of Web API that uses URIs to identify resources and the <a href="http://wikipedia.org/wiki/Link_relation">link relations</a> between them, enabling API consumers to follow links to discover API functionality.') . '</p>';
-      $output .= '<p>' . t('This module adds support for serializing entities (such as content items, taxonomy terms, etc.) to the JSON version of HAL. For more information, see the <a href=":hal_do">online documentation for the HAL module</a>.', array(':hal_do' => 'https://www.drupal.org/documentation/modules/hal')) . '</p>';
+      $output .= '<p>' . t('This module adds support for serializing entities (such as content items, taxonomy terms, etc.) to the JSON version of HAL. For more information, see the <a href=":hal_do">online documentation for the HAL module</a>.', [':hal_do' => 'https://www.drupal.org/documentation/modules/hal']) . '</p>';
       return $output;
   }
 }
diff --git a/core/modules/hal/src/LinkManager/LinkManager.php b/core/modules/hal/src/LinkManager/LinkManager.php
index b78b7cf922cf9d5e77d08d9ae14167c0bc1c6c84..66e68d05fc2234b0c83d98578d8231f42c3de489 100644
--- a/core/modules/hal/src/LinkManager/LinkManager.php
+++ b/core/modules/hal/src/LinkManager/LinkManager.php
@@ -34,21 +34,21 @@ public function __construct(TypeLinkManagerInterface $type_link_manager, Relatio
   /**
    * {@inheritdoc}
    */
-  public function getTypeUri($entity_type, $bundle, $context = array()) {
+  public function getTypeUri($entity_type, $bundle, $context = []) {
     return $this->typeLinkManager->getTypeUri($entity_type, $bundle, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function getTypeInternalIds($type_uri, $context = array()) {
+  public function getTypeInternalIds($type_uri, $context = []) {
     return $this->typeLinkManager->getTypeInternalIds($type_uri, $context);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function getRelationUri($entity_type, $bundle, $field_name, $context = array()) {
+  public function getRelationUri($entity_type, $bundle, $field_name, $context = []) {
     return $this->relationLinkManager->getRelationUri($entity_type, $bundle, $field_name, $context);
   }
 
diff --git a/core/modules/hal/src/LinkManager/RelationLinkManager.php b/core/modules/hal/src/LinkManager/RelationLinkManager.php
index 55eb743b672cdde1de08dccf891341a2398fd7f2..dc6486f203a1d0a3021d029b894b38a7e315401b 100644
--- a/core/modules/hal/src/LinkManager/RelationLinkManager.php
+++ b/core/modules/hal/src/LinkManager/RelationLinkManager.php
@@ -56,7 +56,7 @@ public function __construct(CacheBackendInterface $cache, EntityManagerInterface
   /**
    * {@inheritdoc}
    */
-  public function getRelationUri($entity_type, $bundle, $field_name, $context = array()) {
+  public function getRelationUri($entity_type, $bundle, $field_name, $context = []) {
     // Per the interface documentation of this method, the returned URI may
     // optionally also serve as the URL of a documentation page about this
     // field. However, Drupal does not currently implement such a documentation
@@ -79,7 +79,7 @@ public function getRelationUri($entity_type, $bundle, $field_name, $context = ar
   /**
    * {@inheritdoc}
    */
-  public function getRelationInternalIds($relation_uri, $context = array()) {
+  public function getRelationInternalIds($relation_uri, $context = []) {
     $relations = $this->getRelations($context);
     if (isset($relations[$relation_uri])) {
       return $relations[$relation_uri];
@@ -103,7 +103,7 @@ public function getRelationInternalIds($relation_uri, $context = array()) {
    *   An array of typed data ids (entity_type, bundle, and field name) keyed
    *   by corresponding relation URI.
    */
-  protected function getRelations($context = array()) {
+  protected function getRelations($context = []) {
     $cid = 'hal:links:relations';
     $cache = $this->cache->get($cid);
     if (!$cache) {
@@ -119,26 +119,26 @@ protected function getRelations($context = array()) {
    * @param array $context
    *   Context from the normalizer/serializer operation.
    */
-  protected function writeCache($context = array()) {
-    $data = array();
+  protected function writeCache($context = []) {
+    $data = [];
 
     foreach ($this->entityManager->getDefinitions() as $entity_type) {
       if ($entity_type instanceof ContentEntityTypeInterface) {
         foreach ($this->entityManager->getBundleInfo($entity_type->id()) as $bundle => $bundle_info) {
           foreach ($this->entityManager->getFieldDefinitions($entity_type->id(), $bundle) as $field_definition) {
             $relation_uri = $this->getRelationUri($entity_type->id(), $bundle, $field_definition->getName(), $context);
-            $data[$relation_uri] = array(
+            $data[$relation_uri] = [
               'entity_type' => $entity_type,
               'bundle' => $bundle,
               'field_name' => $field_definition->getName(),
-            );
+            ];
           }
         }
       }
     }
     // These URIs only change when field info changes, so cache it permanently
     // and only clear it when the fields cache is cleared.
-    $this->cache->set('hal:links:relations', $data, Cache::PERMANENT, array('entity_field_info'));
+    $this->cache->set('hal:links:relations', $data, Cache::PERMANENT, ['entity_field_info']);
   }
 
 }
diff --git a/core/modules/hal/src/LinkManager/RelationLinkManagerInterface.php b/core/modules/hal/src/LinkManager/RelationLinkManagerInterface.php
index 73ef535dbddbac5b93461df035a8f619d0e83f34..9a9c83913cc239197151bb1fb6f77274955e356c 100644
--- a/core/modules/hal/src/LinkManager/RelationLinkManagerInterface.php
+++ b/core/modules/hal/src/LinkManager/RelationLinkManagerInterface.php
@@ -23,7 +23,7 @@ interface RelationLinkManagerInterface extends ConfigurableLinkManagerInterface
    * @return string
    *   The corresponding URI for the field.
    */
-  public function getRelationUri($entity_type, $bundle, $field_name, $context = array());
+  public function getRelationUri($entity_type, $bundle, $field_name, $context = []);
 
   /**
    * Translates a REST URI into internal IDs.
diff --git a/core/modules/hal/src/LinkManager/TypeLinkManager.php b/core/modules/hal/src/LinkManager/TypeLinkManager.php
index cc56652960a54a2c66dece515dcfa0ccbeccd11c..c3a948ff86eb85d89c0e37626ece38b98cb7df11 100644
--- a/core/modules/hal/src/LinkManager/TypeLinkManager.php
+++ b/core/modules/hal/src/LinkManager/TypeLinkManager.php
@@ -57,7 +57,7 @@ public function __construct(CacheBackendInterface $cache, ModuleHandlerInterface
   /**
    * {@inheritdoc}
    */
-  public function getTypeUri($entity_type, $bundle, $context = array()) {
+  public function getTypeUri($entity_type, $bundle, $context = []) {
     // Per the interface documentation of this method, the returned URI may
     // optionally also serve as the URL of a documentation page about this
     // bundle. However, Drupal does not currently implement such a documentation
@@ -80,7 +80,7 @@ public function getTypeUri($entity_type, $bundle, $context = array()) {
   /**
    * {@inheritdoc}
    */
-  public function getTypeInternalIds($type_uri, $context = array()) {
+  public function getTypeInternalIds($type_uri, $context = []) {
     $types = $this->getTypes($context);
     if (isset($types[$type_uri])) {
       return $types[$type_uri];
@@ -98,7 +98,7 @@ public function getTypeInternalIds($type_uri, $context = array()) {
    *   An array of typed data ids (entity_type and bundle) keyed by
    *   corresponding type URI.
    */
-  protected function getTypes($context = array()) {
+  protected function getTypes($context = []) {
     $cid = 'hal:links:types';
     $cache = $this->cache->get($cid);
     if (!$cache) {
@@ -120,8 +120,8 @@ protected function getTypes($context = array()) {
    *   An array of typed data ids (entity_type and bundle) keyed by
    *   corresponding type URI.
    */
-  protected function writeCache($context = array()) {
-    $data = array();
+  protected function writeCache($context = []) {
+    $data = [];
 
     // Type URIs correspond to bundles. Iterate through the bundles to get the
     // URI and data for them.
@@ -135,15 +135,15 @@ protected function writeCache($context = array()) {
       foreach ($bundles as $bundle => $bundle_info) {
         // Get a type URI for the bundle.
         $bundle_uri = $this->getTypeUri($entity_type_id, $bundle, $context);
-        $data[$bundle_uri] = array(
+        $data[$bundle_uri] = [
           'entity_type' => $entity_type_id,
           'bundle' => $bundle,
-        );
+        ];
       }
     }
     // These URIs only change when entity info changes, so cache it permanently
     // and only clear it when entity_info is cleared.
-    $this->cache->set('hal:links:types', $data, Cache::PERMANENT, array('entity_types'));
+    $this->cache->set('hal:links:types', $data, Cache::PERMANENT, ['entity_types']);
     return $data;
   }
 
diff --git a/core/modules/hal/src/LinkManager/TypeLinkManagerInterface.php b/core/modules/hal/src/LinkManager/TypeLinkManagerInterface.php
index 9d4e654befe66d8e0eaf981d53f4fe06855b50da..c3dabe419ab9a3fe8d6100b538039d0bf72549d4 100644
--- a/core/modules/hal/src/LinkManager/TypeLinkManagerInterface.php
+++ b/core/modules/hal/src/LinkManager/TypeLinkManagerInterface.php
@@ -21,7 +21,7 @@ interface TypeLinkManagerInterface extends ConfigurableLinkManagerInterface {
    * @return string
    *   The corresponding URI for the bundle.
    */
-  public function getTypeUri($entity_type, $bundle, $context = array());
+  public function getTypeUri($entity_type, $bundle, $context = []);
 
   /**
    * Get a bundle's Typed Data IDs based on a URI.
@@ -35,6 +35,6 @@ public function getTypeUri($entity_type, $bundle, $context = array());
    *   If the URI matches a bundle, returns an array containing entity_type and
    *   bundle. Otherwise, returns false.
    */
-  public function getTypeInternalIds($type_uri, $context = array());
+  public function getTypeInternalIds($type_uri, $context = []);
 
 }
diff --git a/core/modules/hal/src/Normalizer/ContentEntityNormalizer.php b/core/modules/hal/src/Normalizer/ContentEntityNormalizer.php
index ff9d5e66155bc2a8c11d0a6fdafe98b4b6063596..1fc118dc5b5dc2e6f791bd62d3b77f2d5b31d852 100644
--- a/core/modules/hal/src/Normalizer/ContentEntityNormalizer.php
+++ b/core/modules/hal/src/Normalizer/ContentEntityNormalizer.php
@@ -53,28 +53,28 @@ public function __construct(LinkManagerInterface $link_manager, EntityManagerInt
   /**
    * {@inheritdoc}
    */
-  public function normalize($entity, $format = NULL, array $context = array()) {
-    $context += array(
+  public function normalize($entity, $format = NULL, array $context = []) {
+    $context += [
       'account' => NULL,
       'included_fields' => NULL,
-    );
+    ];
 
     // Create the array of normalized fields, starting with the URI.
     /** @var $entity \Drupal\Core\Entity\ContentEntityInterface */
-    $normalized = array(
-      '_links' => array(
-        'self' => array(
+    $normalized = [
+      '_links' => [
+        'self' => [
           'href' => $this->getEntityUri($entity),
-        ),
-        'type' => array(
+        ],
+        'type' => [
           'href' => $this->linkManager->getTypeUri($entity->getEntityTypeId(), $entity->bundle(), $context),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     // If the fields to use were specified, only output those field values.
     if (isset($context['included_fields'])) {
-      $fields = array();
+      $fields = [];
       foreach ($context['included_fields'] as $field_name) {
         $fields[] = $entity->get($field_name);
       }
@@ -115,7 +115,7 @@ public function normalize($entity, $format = NULL, array $context = array()) {
    *
    * @throws \Symfony\Component\Serializer\Exception\UnexpectedValueException
    */
-  public function denormalize($data, $class, $format = NULL, array $context = array()) {
+  public function denormalize($data, $class, $format = NULL, array $context = []) {
     // Get type, necessary for determining which bundle to create.
     if (!isset($data['_links']['type'])) {
       throw new UnexpectedValueException('The type link relation must be specified.');
@@ -126,7 +126,7 @@ public function denormalize($data, $class, $format = NULL, array $context = arra
     $entity_type = $this->getEntityTypeDefinition($typed_data_ids['entity_type']);
     $default_langcode_key = $entity_type->getKey('default_langcode');
     $langcode_key = $entity_type->getKey('langcode');
-    $values = array();
+    $values = [];
 
     // Figure out the language to use.
     if (isset($data[$default_langcode_key])) {
@@ -154,7 +154,7 @@ public function denormalize($data, $class, $format = NULL, array $context = arra
     // Remove links from data array.
     unset($data['_links']);
     // Get embedded resources and remove from data array.
-    $embedded = array();
+    $embedded = [];
     if (isset($data['_embedded'])) {
       $embedded = $data['_embedded'];
       unset($data['_embedded']);
@@ -207,12 +207,12 @@ protected function getEntityUri(EntityInterface $entity) {
    * @return array
    *   The typed data IDs.
    */
-  protected function getTypedDataIds($types, $context = array()) {
+  protected function getTypedDataIds($types, $context = []) {
     // The 'type' can potentially contain an array of type objects. By default,
     // Drupal only uses a single type in serializing, but allows for multiple
     // types when deserializing.
     if (isset($types['href'])) {
-      $types = array($types);
+      $types = [$types];
     }
 
     if (empty($types)) {
diff --git a/core/modules/hal/src/Normalizer/EntityReferenceItemNormalizer.php b/core/modules/hal/src/Normalizer/EntityReferenceItemNormalizer.php
index 224915b84649598c99e64b6b6691048ae0293277..fbcae8c7583fed0bab47af552357a553f7825951 100644
--- a/core/modules/hal/src/Normalizer/EntityReferenceItemNormalizer.php
+++ b/core/modules/hal/src/Normalizer/EntityReferenceItemNormalizer.php
@@ -49,7 +49,7 @@ public function __construct(LinkManagerInterface $link_manager, EntityResolverIn
   /**
    * {@inheritdoc}
    */
-  public function normalize($field_item, $format = NULL, array $context = array()) {
+  public function normalize($field_item, $format = NULL, array $context = []) {
     /** @var $field_item \Drupal\Core\Field\FieldItemInterface */
     $target_entity = $field_item->get('entity')->getValue();
 
@@ -64,7 +64,7 @@ public function normalize($field_item, $format = NULL, array $context = array())
     // will include the langcode.
     $langcode = isset($context['langcode']) ? $context['langcode'] : NULL;
     unset($context['langcode']);
-    $context['included_fields'] = array('uuid');
+    $context['included_fields'] = ['uuid'];
 
     // Normalize the target entity.
     $embedded = $this->serializer->normalize($target_entity, $format, $context);
@@ -81,14 +81,14 @@ public function normalize($field_item, $format = NULL, array $context = array())
     $field_name = $field_item->getParent()->getName();
     $entity = $field_item->getEntity();
     $field_uri = $this->linkManager->getRelationUri($entity->getEntityTypeId(), $entity->bundle(), $field_name, $context);
-    return array(
-      '_links' => array(
-        $field_uri => array($link),
-      ),
-      '_embedded' => array(
-        $field_uri => array($embedded),
-      ),
-    );
+    return [
+      '_links' => [
+        $field_uri => [$link],
+      ],
+      '_embedded' => [
+        $field_uri => [$embedded],
+      ],
+    ];
   }
 
   /**
@@ -100,7 +100,7 @@ protected function constructValue($data, $context) {
     $target_type = $field_definition->getSetting('target_type');
     $id = $this->entityResolver->resolve($this, $data, $target_type);
     if (isset($id)) {
-      return array('target_id' => $id);
+      return ['target_id' => $id];
     }
     return NULL;
   }
diff --git a/core/modules/hal/src/Normalizer/FieldItemNormalizer.php b/core/modules/hal/src/Normalizer/FieldItemNormalizer.php
index 238557af2dc14093bf933cdabea0401e17096920..dc5aec98994ada8055135dff94b6680b0ed271ea 100644
--- a/core/modules/hal/src/Normalizer/FieldItemNormalizer.php
+++ b/core/modules/hal/src/Normalizer/FieldItemNormalizer.php
@@ -20,7 +20,7 @@ class FieldItemNormalizer extends NormalizerBase {
   /**
    * {@inheritdoc}
    */
-  public function normalize($field_item, $format = NULL, array $context = array()) {
+  public function normalize($field_item, $format = NULL, array $context = []) {
     $values = [];
     // We normalize each individual property, so each can do their own casting,
     // if needed.
@@ -38,15 +38,15 @@ public function normalize($field_item, $format = NULL, array $context = array())
     // FieldNormalizer. This is necessary for the EntityReferenceItemNormalizer
     // to be able to place values in the '_links' array.
     $field = $field_item->getParent();
-    return array(
-      $field->getName() => array($values),
-    );
+    return [
+      $field->getName() => [$values],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function denormalize($data, $class, $format = NULL, array $context = array()) {
+  public function denormalize($data, $class, $format = NULL, array $context = []) {
     if (!isset($context['target_instance'])) {
       throw new InvalidArgumentException('$context[\'target_instance\'] must be set to denormalize with the FieldItemNormalizer');
     }
diff --git a/core/modules/hal/src/Normalizer/FieldNormalizer.php b/core/modules/hal/src/Normalizer/FieldNormalizer.php
index 0313221b403dd0681f1ecf084db8ecac596bbe3b..a4e175323ac1c38453609e1bf84a5c1a51edd144 100644
--- a/core/modules/hal/src/Normalizer/FieldNormalizer.php
+++ b/core/modules/hal/src/Normalizer/FieldNormalizer.php
@@ -20,8 +20,8 @@ class FieldNormalizer extends SerializationFieldNormalizer {
   /**
    * {@inheritdoc}
    */
-  public function normalize($field, $format = NULL, array $context = array()) {
-    $normalized_field_items = array();
+  public function normalize($field, $format = NULL, array $context = []) {
+    $normalized_field_items = [];
 
     // Get the field definition.
     $entity = $field->getEntity();
@@ -65,7 +65,7 @@ public function normalize($field, $format = NULL, array $context = array()) {
    *   The array of normalized field items.
    */
   protected function normalizeFieldItems($field, $format, $context) {
-    $normalized_field_items = array();
+    $normalized_field_items = [];
     if (!$field->isEmpty()) {
       foreach ($field as $field_item) {
         $normalized_field_items[] = $this->serializer->normalize($field_item, $format, $context);
diff --git a/core/modules/hal/src/Normalizer/FileEntityNormalizer.php b/core/modules/hal/src/Normalizer/FileEntityNormalizer.php
index 2c94eb9074270d6a149e507f1467628788b8a0d8..ec870e9e14c6df6c306e62a73216ca468a24ab3d 100644
--- a/core/modules/hal/src/Normalizer/FileEntityNormalizer.php
+++ b/core/modules/hal/src/Normalizer/FileEntityNormalizer.php
@@ -47,7 +47,7 @@ public function __construct(EntityManagerInterface $entity_manager, ClientInterf
   /**
    * {@inheritdoc}
    */
-  public function normalize($entity, $format = NULL, array $context = array()) {
+  public function normalize($entity, $format = NULL, array $context = []) {
     $data = parent::normalize($entity, $format, $context);
     // Replace the file url with a full url for the file.
     $data['uri'][0]['value'] = $this->getEntityUri($entity);
@@ -58,7 +58,7 @@ public function normalize($entity, $format = NULL, array $context = array()) {
   /**
    * {@inheritdoc}
    */
-  public function denormalize($data, $class, $format = NULL, array $context = array()) {
+  public function denormalize($data, $class, $format = NULL, array $context = []) {
     $file_data = (string) $this->httpClient->get($data['uri'][0]['value'])->getBody();
 
     $path = 'temporary://' . drupal_basename($data['uri'][0]['value']);
diff --git a/core/modules/hal/src/Normalizer/NormalizerBase.php b/core/modules/hal/src/Normalizer/NormalizerBase.php
index a4b9af23fa2349c9de3fb1e58797538d74515a3e..43a5a07161f5d3db4387b73289557898a0575f1e 100644
--- a/core/modules/hal/src/Normalizer/NormalizerBase.php
+++ b/core/modules/hal/src/Normalizer/NormalizerBase.php
@@ -15,7 +15,7 @@ abstract class NormalizerBase extends SerializationNormalizerBase implements Den
    *
    * @var array
    */
-  protected $formats = array('hal_json');
+  protected $formats = ['hal_json'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/hal/tests/modules/hal_test/hal_test.module b/core/modules/hal/tests/modules/hal_test/hal_test.module
index 5937984fce96c68daa956a824db23bbd579e0a3a..8788eaf41eac1039848b74be06ff4bcb0a2cbceb 100644
--- a/core/modules/hal/tests/modules/hal_test/hal_test.module
+++ b/core/modules/hal/tests/modules/hal_test/hal_test.module
@@ -8,7 +8,7 @@
 /**
  * Implements hook_hal_type_uri_alter().
  */
-function hal_test_hal_type_uri_alter(&$uri, $context = array()) {
+function hal_test_hal_type_uri_alter(&$uri, $context = []) {
   if (!empty($context['hal_test'])) {
     $uri = 'hal_test_type';
   }
@@ -17,7 +17,7 @@ function hal_test_hal_type_uri_alter(&$uri, $context = array()) {
 /**
  * Implements hook_hal_relation_uri_alter().
  */
-function hal_test_hal_relation_uri_alter(&$uri, $context = array()) {
+function hal_test_hal_relation_uri_alter(&$uri, $context = []) {
   if (!empty($context['hal_test'])) {
     $uri = 'hal_test_relation';
   }
@@ -28,7 +28,7 @@ function hal_test_hal_relation_uri_alter(&$uri, $context = array()) {
  *
  * @deprecated Kept only for BC test coverage, see \Drupal\Tests\hal\Kernel\HalLinkManagerTest::testGetTypeUri().
  */
-function hal_test_rest_type_uri_alter(&$uri, $context = array()) {
+function hal_test_rest_type_uri_alter(&$uri, $context = []) {
   if (!empty($context['rest_test'])) {
     $uri = 'rest_test_type';
   }
@@ -39,7 +39,7 @@ function hal_test_rest_type_uri_alter(&$uri, $context = array()) {
  *
  * @deprecated Kept only for BC test coverage, see \Drupal\Tests\hal\Kernel\HalLinkManagerTest::testGetRelationUri().
  */
-function hal_test_rest_relation_uri_alter(&$uri, $context = array()) {
+function hal_test_rest_relation_uri_alter(&$uri, $context = []) {
   if (!empty($context['rest_test'])) {
     $uri = 'rest_test_relation';
   }
diff --git a/core/modules/hal/tests/src/Functional/FileDenormalizeTest.php b/core/modules/hal/tests/src/Functional/FileDenormalizeTest.php
index 36f87627bc42043e287b4aaf93ec716c8862b5a7..05ee23489394832d3457ad7c664a6d704bd905bd 100644
--- a/core/modules/hal/tests/src/Functional/FileDenormalizeTest.php
+++ b/core/modules/hal/tests/src/Functional/FileDenormalizeTest.php
@@ -18,18 +18,18 @@ class FileDenormalizeTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('hal', 'file', 'node');
+  public static $modules = ['hal', 'file', 'node'];
 
   /**
    * Tests file entity denormalization.
    */
   public function testFileDenormalize() {
-    $file_params = array(
+    $file_params = [
       'filename' => 'test_1.txt',
       'uri' => 'public://test_1.txt',
       'filemime' => 'text/plain',
       'status' => FILE_STATUS_PERMANENT,
-    );
+    ];
     // Create a new file entity.
     $file = File::create($file_params);
     file_put_contents($file->getFileUri(), 'hello world');
@@ -56,11 +56,11 @@ public function testFileDenormalize() {
     file_put_contents($file_path, 'hello world');
     $file_uri = file_create_url($file_path);
 
-    $data = array(
-      'uri' => array(
-        array('value' => $file_uri),
-      ),
-    );
+    $data = [
+      'uri' => [
+        ['value' => $file_uri],
+      ],
+    ];
 
     $denormalized = $serializer->denormalize($data, 'Drupal\file\Entity\File', 'hal_json');
 
diff --git a/core/modules/hal/tests/src/Kernel/DenormalizeTest.php b/core/modules/hal/tests/src/Kernel/DenormalizeTest.php
index 3f9388bce4a462a8163ba406c288d7b8fbb63f11..d3662cb597a2d7c8646739dd445c22de235babb2 100644
--- a/core/modules/hal/tests/src/Kernel/DenormalizeTest.php
+++ b/core/modules/hal/tests/src/Kernel/DenormalizeTest.php
@@ -18,40 +18,40 @@ class DenormalizeTest extends NormalizerTestBase {
    */
   public function testTypeHandling() {
     // Valid type.
-    $data_with_valid_type = array(
-      '_links' => array(
-        'type' => array(
-          'href' => Url::fromUri('base:rest/type/entity_test/entity_test', array('absolute' => TRUE))->toString(),
-        ),
-      ),
-    );
+    $data_with_valid_type = [
+      '_links' => [
+        'type' => [
+          'href' => Url::fromUri('base:rest/type/entity_test/entity_test', ['absolute' => TRUE])->toString(),
+        ],
+      ],
+    ];
     $denormalized = $this->serializer->denormalize($data_with_valid_type, $this->entityClass, $this->format);
     $this->assertEqual(get_class($denormalized), $this->entityClass, 'Request with valid type results in creation of correct bundle.');
 
     // Multiple types.
-    $data_with_multiple_types = array(
-      '_links' => array(
-        'type' => array(
-          array(
-            'href' => Url::fromUri('base:rest/types/foo', array('absolute' => TRUE))->toString(),
-          ),
-          array(
-            'href' => Url::fromUri('base:rest/type/entity_test/entity_test', array('absolute' => TRUE))->toString(),
-          ),
-        ),
-      ),
-    );
+    $data_with_multiple_types = [
+      '_links' => [
+        'type' => [
+          [
+            'href' => Url::fromUri('base:rest/types/foo', ['absolute' => TRUE])->toString(),
+          ],
+          [
+            'href' => Url::fromUri('base:rest/type/entity_test/entity_test', ['absolute' => TRUE])->toString(),
+          ],
+        ],
+      ],
+    ];
     $denormalized = $this->serializer->denormalize($data_with_multiple_types, $this->entityClass, $this->format);
     $this->assertEqual(get_class($denormalized), $this->entityClass, 'Request with multiple types results in creation of correct bundle.');
 
     // Invalid type.
-    $data_with_invalid_type = array(
-      '_links' => array(
-        'type' => array(
-          'href' => Url::fromUri('base:rest/types/foo', array('absolute' => TRUE))->toString(),
-        ),
-      ),
-    );
+    $data_with_invalid_type = [
+      '_links' => [
+        'type' => [
+          'href' => Url::fromUri('base:rest/types/foo', ['absolute' => TRUE])->toString(),
+        ],
+      ],
+    ];
     try {
       $this->serializer->denormalize($data_with_invalid_type, $this->entityClass, $this->format);
       $this->fail('Exception should be thrown when type is invalid.');
@@ -61,10 +61,10 @@ public function testTypeHandling() {
     }
 
     // No type.
-    $data_with_no_type = array(
-      '_links' => array(
-      ),
-    );
+    $data_with_no_type = [
+      '_links' => [
+      ],
+    ];
     try {
       $this->serializer->denormalize($data_with_no_type, $this->entityClass, $this->format);
       $this->fail('Exception should be thrown when no type is provided.');
@@ -78,13 +78,13 @@ public function testTypeHandling() {
    * Tests link relation handling with an invalid type.
    */
   public function testTypeHandlingWithInvalidType() {
-    $data_with_invalid_type = array(
-      '_links' => array(
-        'type' => array(
-          'href' => Url::fromUri('base:rest/type/entity_test/entity_test_invalid', array('absolute' => TRUE))->toString(),
-        ),
-      ),
-    );
+    $data_with_invalid_type = [
+      '_links' => [
+        'type' => [
+          'href' => Url::fromUri('base:rest/type/entity_test/entity_test_invalid', ['absolute' => TRUE])->toString(),
+        ],
+      ],
+    ];
 
     $this->setExpectedException(UnexpectedValueException::class);
     $this->serializer->denormalize($data_with_invalid_type, $this->entityClass, $this->format);
@@ -94,11 +94,11 @@ public function testTypeHandlingWithInvalidType() {
    * Tests link relation handling with no types.
    */
   public function testTypeHandlingWithNoTypes() {
-    $data_with_no_types = array(
-      '_links' => array(
-        'type' => array(),
-      ),
-    );
+    $data_with_no_types = [
+      '_links' => [
+        'type' => [],
+      ],
+    ];
 
     $this->setExpectedException(UnexpectedValueException::class);
     $this->serializer->denormalize($data_with_no_types, $this->entityClass, $this->format);
@@ -110,32 +110,32 @@ public function testTypeHandlingWithNoTypes() {
   public function testMarkFieldForDeletion() {
     // Add a default value for a field.
     $field = FieldConfig::loadByName('entity_test', 'entity_test', 'field_test_text');
-    $field->setDefaultValue(array(array('value' => 'Llama')));
+    $field->setDefaultValue([['value' => 'Llama']]);
     $field->save();
 
     // Denormalize data that contains no entry for the field, and check that
     // the default value is present in the resulting entity.
-    $data = array(
-      '_links' => array(
-        'type' => array(
-          'href' => Url::fromUri('base:rest/type/entity_test/entity_test', array('absolute' => TRUE))->toString(),
-        ),
-      ),
-    );
+    $data = [
+      '_links' => [
+        'type' => [
+          'href' => Url::fromUri('base:rest/type/entity_test/entity_test', ['absolute' => TRUE])->toString(),
+        ],
+      ],
+    ];
     $entity = $this->serializer->denormalize($data, $this->entityClass, $this->format);
     $this->assertEqual($entity->field_test_text->count(), 1);
     $this->assertEqual($entity->field_test_text->value, 'Llama');
 
     // Denormalize data that contains an empty entry for the field, and check
     // that the field is empty in the resulting entity.
-    $data = array(
-      '_links' => array(
-        'type' => array(
-          'href' => Url::fromUri('base:rest/type/entity_test/entity_test', array('absolute' => TRUE))->toString(),
-        ),
-      ),
-      'field_test_text' => array(),
-    );
+    $data = [
+      '_links' => [
+        'type' => [
+          'href' => Url::fromUri('base:rest/type/entity_test/entity_test', ['absolute' => TRUE])->toString(),
+        ],
+      ],
+      'field_test_text' => [],
+    ];
     $entity = $this->serializer->denormalize($data, get_class($entity), $this->format, [ 'target_instance' => $entity ]);
     $this->assertEqual($entity->field_test_text->count(), 0);
   }
diff --git a/core/modules/hal/tests/src/Kernel/EntityTranslationNormalizeTest.php b/core/modules/hal/tests/src/Kernel/EntityTranslationNormalizeTest.php
index 74f5104c2fde9db732b13ed87e5105cca1ba94eb..5b752f7bb6ab7597ed76dccdd24c09068f27fec6 100644
--- a/core/modules/hal/tests/src/Kernel/EntityTranslationNormalizeTest.php
+++ b/core/modules/hal/tests/src/Kernel/EntityTranslationNormalizeTest.php
@@ -19,14 +19,14 @@ class EntityTranslationNormalizeTest extends NormalizerTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'content_translation');
+  public static $modules = ['node', 'content_translation'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('system', array('sequences'));
+    $this->installSchema('system', ['sequences']);
     $this->installConfig(['node', 'content_translation']);
   }
 
diff --git a/core/modules/hal/tests/src/Kernel/FileNormalizeTest.php b/core/modules/hal/tests/src/Kernel/FileNormalizeTest.php
index d6978e656f4198296e0f12b4d7924f2791e82874..8f535c52c90a5cce01f396892d6272217265934f 100644
--- a/core/modules/hal/tests/src/Kernel/FileNormalizeTest.php
+++ b/core/modules/hal/tests/src/Kernel/FileNormalizeTest.php
@@ -16,7 +16,7 @@ class FileNormalizeTest extends NormalizerTestBase {
    *
    * @var array
    */
-  public static $modules = array('file');
+  public static $modules = ['file'];
 
   /**
    * {@inheritdoc}
@@ -31,23 +31,23 @@ protected function setUp() {
    * Tests the normalize function.
    */
   public function testNormalize() {
-    $file_params = array(
+    $file_params = [
       'filename' => 'test_1.txt',
       'uri' => 'public://test_1.txt',
       'filemime' => 'text/plain',
       'status' => FILE_STATUS_PERMANENT,
-    );
+    ];
     // Create a new file entity.
     $file = File::create($file_params);
     file_put_contents($file->getFileUri(), 'hello world');
     $file->save();
 
-    $expected_array = array(
-      'uri' => array(
-        array(
-          'value' => file_create_url($file->getFileUri())),
-      ),
-    );
+    $expected_array = [
+      'uri' => [
+        [
+          'value' => file_create_url($file->getFileUri())],
+      ],
+    ];
 
     $normalized = $this->serializer->normalize($file, $this->format);
     $this->assertEqual($normalized['uri'], $expected_array['uri'], 'URI is normalized.');
diff --git a/core/modules/hal/tests/src/Kernel/NormalizeTest.php b/core/modules/hal/tests/src/Kernel/NormalizeTest.php
index cfffb4a8652d455f890db44e62733d00a7b6c2f8..d837b79a02eef84c3165782b337b5b94685633eb 100644
--- a/core/modules/hal/tests/src/Kernel/NormalizeTest.php
+++ b/core/modules/hal/tests/src/Kernel/NormalizeTest.php
@@ -26,135 +26,135 @@ protected function setUp() {
    * Tests the normalize function.
    */
   public function testNormalize() {
-    $target_entity_de = EntityTest::create((array('langcode' => 'de', 'field_test_entity_reference' => NULL)));
+    $target_entity_de = EntityTest::create((['langcode' => 'de', 'field_test_entity_reference' => NULL]));
     $target_entity_de->save();
-    $target_entity_en = EntityTest::create((array('langcode' => 'en', 'field_test_entity_reference' => NULL)));
+    $target_entity_en = EntityTest::create((['langcode' => 'en', 'field_test_entity_reference' => NULL]));
     $target_entity_en->save();
 
     // Create a German entity.
-    $values = array(
+    $values = [
       'langcode' => 'de',
       'name' => $this->randomMachineName(),
-      'field_test_text' => array(
+      'field_test_text' => [
         'value' => $this->randomMachineName(),
         'format' => 'full_html',
-      ),
-      'field_test_entity_reference' => array(
+      ],
+      'field_test_entity_reference' => [
         'target_id' => $target_entity_de->id(),
-      ),
-    );
+      ],
+    ];
     // Array of translated values.
-    $translation_values = array(
+    $translation_values = [
       'name' => $this->randomMachineName(),
-      'field_test_entity_reference' => array(
+      'field_test_entity_reference' => [
         'target_id' => $target_entity_en->id(),
-      )
-    );
+      ]
+    ];
 
     $entity = EntityTest::create($values);
     $entity->save();
     // Add an English value for name and entity reference properties.
-    $entity->addTranslation('en')->set('name', array(0 => array('value' => $translation_values['name'])));
-    $entity->getTranslation('en')->set('field_test_entity_reference', array(0 => $translation_values['field_test_entity_reference']));
+    $entity->addTranslation('en')->set('name', [0 => ['value' => $translation_values['name']]]);
+    $entity->getTranslation('en')->set('field_test_entity_reference', [0 => $translation_values['field_test_entity_reference']]);
     $entity->save();
 
-    $type_uri = Url::fromUri('base:rest/type/entity_test/entity_test', array('absolute' => TRUE))->toString();
-    $relation_uri = Url::fromUri('base:rest/relation/entity_test/entity_test/field_test_entity_reference', array('absolute' => TRUE))->toString();
+    $type_uri = Url::fromUri('base:rest/type/entity_test/entity_test', ['absolute' => TRUE])->toString();
+    $relation_uri = Url::fromUri('base:rest/relation/entity_test/entity_test/field_test_entity_reference', ['absolute' => TRUE])->toString();
 
-    $expected_array = array(
-      '_links' => array(
-        'curies' => array(
-          array(
+    $expected_array = [
+      '_links' => [
+        'curies' => [
+          [
             'href' => '/relations',
             'name' => 'site',
             'templated' => TRUE,
-          ),
-        ),
-        'self' => array(
+          ],
+        ],
+        'self' => [
           'href' => $this->getEntityUri($entity),
-        ),
-        'type' => array(
+        ],
+        'type' => [
           'href' => $type_uri,
-        ),
-        $relation_uri => array(
-          array(
+        ],
+        $relation_uri => [
+          [
             'href' => $this->getEntityUri($target_entity_de),
             'lang' => 'de',
-          ),
-          array(
+          ],
+          [
             'href' => $this->getEntityUri($target_entity_en),
             'lang' => 'en',
-          ),
-        ),
-      ),
-      '_embedded' => array(
-        $relation_uri => array(
-          array(
-            '_links' => array(
-              'self' => array(
+          ],
+        ],
+      ],
+      '_embedded' => [
+        $relation_uri => [
+          [
+            '_links' => [
+              'self' => [
                 'href' => $this->getEntityUri($target_entity_de),
-              ),
-              'type' => array(
+              ],
+              'type' => [
                 'href' => $type_uri,
-              ),
-            ),
-            'uuid' => array(
-              array(
+              ],
+            ],
+            'uuid' => [
+              [
                 'value' => $target_entity_de->uuid(),
-              ),
-            ),
+              ],
+            ],
             'lang' => 'de',
-          ),
-          array(
-            '_links' => array(
-              'self' => array(
+          ],
+          [
+            '_links' => [
+              'self' => [
                 'href' => $this->getEntityUri($target_entity_en),
-              ),
-              'type' => array(
+              ],
+              'type' => [
                 'href' => $type_uri,
-              ),
-            ),
-            'uuid' => array(
-              array(
+              ],
+            ],
+            'uuid' => [
+              [
                 'value' => $target_entity_en->uuid(),
-              ),
-            ),
+              ],
+            ],
             'lang' => 'en',
-          ),
-        ),
-      ),
-      'id' => array(
-        array(
+          ],
+        ],
+      ],
+      'id' => [
+        [
           'value' => $entity->id(),
-        ),
-      ),
-      'uuid' => array(
-        array(
+        ],
+      ],
+      'uuid' => [
+        [
           'value' => $entity->uuid(),
-        ),
-      ),
-      'langcode' => array(
-        array(
+        ],
+      ],
+      'langcode' => [
+        [
           'value' => 'de',
-        ),
-      ),
-      'name' => array(
-        array(
+        ],
+      ],
+      'name' => [
+        [
           'value' => $values['name'],
           'lang' => 'de',
-        ),
-        array(
+        ],
+        [
           'value' => $translation_values['name'],
           'lang' => 'en',
-        ),
-      ),
-      'field_test_text' => array(
-        array(
+        ],
+      ],
+      'field_test_text' => [
+        [
           'value' => $values['field_test_text']['value'],
           'format' => $values['field_test_text']['format'],
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     $normalized = $this->serializer->normalize($entity, $this->format);
     $this->assertEqual($normalized['_links']['self'], $expected_array['_links']['self'], 'self link placed correctly.');
diff --git a/core/modules/hal/tests/src/Kernel/NormalizerTestBase.php b/core/modules/hal/tests/src/Kernel/NormalizerTestBase.php
index 9dac94c81f3236773490443d4c3af2023c536623..ef51a077c94f72977e95814c66e5293e75a67e53 100644
--- a/core/modules/hal/tests/src/Kernel/NormalizerTestBase.php
+++ b/core/modules/hal/tests/src/Kernel/NormalizerTestBase.php
@@ -58,29 +58,29 @@ protected function setUp() {
         // Only check the modules, if the $modules property was not inherited.
         $rp = new \ReflectionProperty($class, 'modules');
         if ($rp->class == $class) {
-          foreach (array_intersect(array('node', 'comment'), $class::$modules) as $module) {
+          foreach (array_intersect(['node', 'comment'], $class::$modules) as $module) {
             $this->installEntitySchema($module);
           }
         }
       }
       $class = get_parent_class($class);
     }
-    $this->installConfig(array('field', 'language'));
+    $this->installConfig(['field', 'language']);
     \Drupal::service('router.builder')->rebuild();
 
     // Add German as a language.
-    ConfigurableLanguage::create(array(
+    ConfigurableLanguage::create([
       'id' => 'de',
       'label' => 'Deutsch',
       'weight' => -1,
-    ))->save();
+    ])->save();
 
     // Create the test text field.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_test_text',
       'entity_type' => 'entity_test',
       'type' => 'text',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_test_text',
@@ -89,11 +89,11 @@ protected function setUp() {
     ])->save();
 
     // Create the test translatable field.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_test_translatable_text',
       'entity_type' => 'entity_test',
       'type' => 'text',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_test_translatable_text',
@@ -102,14 +102,14 @@ protected function setUp() {
     ])->save();
 
     // Create the test entity reference field.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_test_entity_reference',
       'entity_type' => 'entity_test',
       'type' => 'entity_reference',
-      'settings' => array(
+      'settings' => [
         'target_type' => 'entity_test',
-      ),
-    ))->save();
+      ],
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_test_entity_reference',
diff --git a/core/modules/hal/tests/src/Unit/FieldItemNormalizerDenormalizeExceptionsUnitTest.php b/core/modules/hal/tests/src/Unit/FieldItemNormalizerDenormalizeExceptionsUnitTest.php
index 550c185b4013cb2ac424b3dae817381eb1933beb..6d876e61cae1dfdeba3892a453f0cd53ce4777a4 100644
--- a/core/modules/hal/tests/src/Unit/FieldItemNormalizerDenormalizeExceptionsUnitTest.php
+++ b/core/modules/hal/tests/src/Unit/FieldItemNormalizerDenormalizeExceptionsUnitTest.php
@@ -21,8 +21,8 @@ class FieldItemNormalizerDenormalizeExceptionsUnitTest extends NormalizerDenorma
    */
   public function testFieldItemNormalizerDenormalizeExceptions($context) {
     $field_item_normalizer = new FieldItemNormalizer();
-    $data = array();
-    $class = array();
+    $data = [];
+    $class = [];
     $field_item_normalizer->denormalize($data, $class, NULL, $context);
   }
 
diff --git a/core/modules/hal/tests/src/Unit/FieldNormalizerDenormalizeExceptionsUnitTest.php b/core/modules/hal/tests/src/Unit/FieldNormalizerDenormalizeExceptionsUnitTest.php
index a257209e69d4f426302aac67391cdcd470eed059..7cc55bb48312b4dffcfd75141e6f074d125da445 100644
--- a/core/modules/hal/tests/src/Unit/FieldNormalizerDenormalizeExceptionsUnitTest.php
+++ b/core/modules/hal/tests/src/Unit/FieldNormalizerDenormalizeExceptionsUnitTest.php
@@ -21,8 +21,8 @@ class FieldNormalizerDenormalizeExceptionsUnitTest extends NormalizerDenormalize
    */
   public function testFieldNormalizerDenormalizeExceptions($context) {
     $field_item_normalizer = new FieldNormalizer();
-    $data = array();
-    $class = array();
+    $data = [];
+    $class = [];
     $field_item_normalizer->denormalize($data, $class, NULL, $context);
   }
 
diff --git a/core/modules/hal/tests/src/Unit/NormalizerDenormalizeExceptionsUnitTestBase.php b/core/modules/hal/tests/src/Unit/NormalizerDenormalizeExceptionsUnitTestBase.php
index 52ba805b23d6ef42c60f2c11def34ffb7db5d008..d1a3b9b1d7319ed3aa7441dd22f293c7fb7dd51a 100644
--- a/core/modules/hal/tests/src/Unit/NormalizerDenormalizeExceptionsUnitTestBase.php
+++ b/core/modules/hal/tests/src/Unit/NormalizerDenormalizeExceptionsUnitTestBase.php
@@ -18,14 +18,14 @@ abstract class NormalizerDenormalizeExceptionsUnitTestBase extends UnitTestCase
    * @return array Test data.
    */
   public function providerNormalizerDenormalizeExceptions() {
-    $mock = $this->getMock('\Drupal\Core\Field\Plugin\DataType\FieldItem', array('getParent'));
+    $mock = $this->getMock('\Drupal\Core\Field\Plugin\DataType\FieldItem', ['getParent']);
     $mock->expects($this->any())
       ->method('getParent')
       ->will($this->returnValue(NULL));
-    return array(
-      array(array()),
-      array(array('target_instance' => $mock)),
-    );
+    return [
+      [[]],
+      [['target_instance' => $mock]],
+    ];
   }
 
 }
diff --git a/core/modules/help/help.api.php b/core/modules/help/help.api.php
index aff491c7ea114f6a190198daf739c1e8c691f192..8b4b1cca26396cadb17a42541deb8009f2a98fcb 100644
--- a/core/modules/help/help.api.php
+++ b/core/modules/help/help.api.php
@@ -48,7 +48,7 @@ function hook_help($route_name, \Drupal\Core\Routing\RouteMatchInterface $route_
   switch ($route_name) {
     // Main module help for the block module.
     case 'help.page.block':
-      return '<p>' . t('Blocks are boxes of content rendered into an area, or region, of a web page. The default theme Bartik, for example, implements the regions "Sidebar first", "Sidebar second", "Featured", "Content", "Header", "Footer", etc., and a block may appear in any one of these areas. The <a href=":blocks">blocks administration page</a> provides a drag-and-drop interface for assigning a block to a region, and for controlling the order of blocks within regions.', array(':blocks' => \Drupal::url('block.admin_display'))) . '</p>';
+      return '<p>' . t('Blocks are boxes of content rendered into an area, or region, of a web page. The default theme Bartik, for example, implements the regions "Sidebar first", "Sidebar second", "Featured", "Content", "Header", "Footer", etc., and a block may appear in any one of these areas. The <a href=":blocks">blocks administration page</a> provides a drag-and-drop interface for assigning a block to a region, and for controlling the order of blocks within regions.', [':blocks' => \Drupal::url('block.admin_display')]) . '</p>';
 
     // Help for another path in the block module.
     case 'block.admin_display':
diff --git a/core/modules/help/help.module b/core/modules/help/help.module
index c41cd98414a8895ccbf6c1832e6312933a5760aa..ca49bee8d43db2b4e2add479c1ec455b653e5445 100644
--- a/core/modules/help/help.module
+++ b/core/modules/help/help.module
@@ -17,27 +17,27 @@ function help_help($route_name, RouteMatchInterface $route_match) {
       $output = '<h2>' . t('Getting Started') . '</h2>';
       $output .= '<p>' . t('Follow these steps to set up and start using your website:') . '</p>';
       $output .= '<ol>';
-      $output .= '<li>' . t('<strong>Configure your website</strong> Once logged in, visit the <a href=":admin">Administration page</a>, where you may <a href=":config">customize and configure</a> all aspects of your website.', array(':admin' => \Drupal::url('system.admin'), ':config' => \Drupal::url('system.admin_config'))) . '</li>';
-      $output .= '<li>' . t('<strong>Enable additional functionality</strong> Next, visit the <a href=":modules">Extend page</a> and enable modules that suit your specific needs. You can find additional modules at the <a href=":download_modules">Drupal.org modules page</a>.', array(':modules' => \Drupal::url('system.modules_list'), ':download_modules' => 'https://www.drupal.org/project/modules')) . '</li>';
-      $output .= '<li>' . t('<strong>Customize your website design</strong> To change the "look and feel" of your website, visit the <a href=":themes">Appearance page</a>. You may choose from one of the included themes or download additional themes from the <a href=":download_themes">Drupal.org themes page</a>.', array(':themes' => \Drupal::url('system.themes_page'), ':download_themes' => 'https://www.drupal.org/project/themes')) . '</li>';
+      $output .= '<li>' . t('<strong>Configure your website</strong> Once logged in, visit the <a href=":admin">Administration page</a>, where you may <a href=":config">customize and configure</a> all aspects of your website.', [':admin' => \Drupal::url('system.admin'), ':config' => \Drupal::url('system.admin_config')]) . '</li>';
+      $output .= '<li>' . t('<strong>Enable additional functionality</strong> Next, visit the <a href=":modules">Extend page</a> and enable modules that suit your specific needs. You can find additional modules at the <a href=":download_modules">Drupal.org modules page</a>.', [':modules' => \Drupal::url('system.modules_list'), ':download_modules' => 'https://www.drupal.org/project/modules']) . '</li>';
+      $output .= '<li>' . t('<strong>Customize your website design</strong> To change the "look and feel" of your website, visit the <a href=":themes">Appearance page</a>. You may choose from one of the included themes or download additional themes from the <a href=":download_themes">Drupal.org themes page</a>.', [':themes' => \Drupal::url('system.themes_page'), ':download_themes' => 'https://www.drupal.org/project/themes']) . '</li>';
       // Display a link to the create content page if Node module is enabled.
       if (\Drupal::moduleHandler()->moduleExists('node')) {
-        $output .= '<li>' . t('<strong>Start posting content</strong> Finally, you may <a href=":content">add new content</a> to your website.', array(':content' => \Drupal::url('node.add_page'))) . '</li>';
+        $output .= '<li>' . t('<strong>Start posting content</strong> Finally, you may <a href=":content">add new content</a> to your website.', [':content' => \Drupal::url('node.add_page')]) . '</li>';
       }
       $output .= '</ol>';
-      $output .= '<p>' . t('For more information, refer to the help listed on this page or to the <a href=":docs">online documentation</a> and <a href=":support">support</a> pages at <a href=":drupal">drupal.org</a>.', array(':docs' => 'https://www.drupal.org/documentation', ':support' => 'https://www.drupal.org/support', ':drupal' => 'https://www.drupal.org')) . '</p>';
+      $output .= '<p>' . t('For more information, refer to the help listed on this page or to the <a href=":docs">online documentation</a> and <a href=":support">support</a> pages at <a href=":drupal">drupal.org</a>.', [':docs' => 'https://www.drupal.org/documentation', ':support' => 'https://www.drupal.org/support', ':drupal' => 'https://www.drupal.org']) . '</p>';
       return ['#markup' => $output];
 
     case 'help.page.help':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Help module generates <a href=":help-page">Help reference pages</a> to guide you through the use and configuration of modules, and provides a Help block with page-level help. The reference pages are a starting point for <a href=":handbook">Drupal.org online documentation</a> pages that contain more extensive and up-to-date information, are annotated with user-contributed comments, and serve as the definitive reference point for all Drupal documentation. For more information, see the <a href=":help">online documentation for the Help module</a>.', array(':help' => 'https://www.drupal.org/documentation/modules/help/', ':handbook' => 'https://www.drupal.org/documentation', ':help-page' => \Drupal::url('help.main'))) . '</p>';
+      $output .= '<p>' . t('The Help module generates <a href=":help-page">Help reference pages</a> to guide you through the use and configuration of modules, and provides a Help block with page-level help. The reference pages are a starting point for <a href=":handbook">Drupal.org online documentation</a> pages that contain more extensive and up-to-date information, are annotated with user-contributed comments, and serve as the definitive reference point for all Drupal documentation. For more information, see the <a href=":help">online documentation for the Help module</a>.', [':help' => 'https://www.drupal.org/documentation/modules/help/', ':handbook' => 'https://www.drupal.org/documentation', ':help-page' => \Drupal::url('help.main')]) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Providing a help reference') . '</dt>';
-      $output .= '<dd>' . t('The Help module displays explanations for using each module listed on the main <a href=":help">Help reference page</a>.', array(':help' => \Drupal::url('help.main'))) . '</dd>';
+      $output .= '<dd>' . t('The Help module displays explanations for using each module listed on the main <a href=":help">Help reference page</a>.', [':help' => \Drupal::url('help.main')]) . '</dd>';
       $output .= '<dt>' . t('Providing page-specific help') . '</dt>';
-      $output .= '<dd>' . t('Page-specific help text provided by modules is displayed in the Help block. This block can be placed and configured on the <a href=":blocks">Block layout page</a>.', array(':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
+      $output .= '<dd>' . t('Page-specific help text provided by modules is displayed in the Help block. This block can be placed and configured on the <a href=":blocks">Block layout page</a>.', [':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#']) . '</dd>';
       $output .= '</dl>';
       return ['#markup' => $output];
   }
diff --git a/core/modules/help/src/Controller/HelpController.php b/core/modules/help/src/Controller/HelpController.php
index 6c3f06142a6cd87603f1e48fa500d24d1ea1598b..74d46ecb056303d5479e936ebebc0c035bf9a03a 100644
--- a/core/modules/help/src/Controller/HelpController.php
+++ b/core/modules/help/src/Controller/HelpController.php
@@ -112,7 +112,7 @@ public function helpMain() {
    * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
    */
   public function helpPage($name) {
-    $build = array();
+    $build = [];
     if ($this->moduleHandler()->implementsHook($name, 'help')) {
       $module_name = $this->moduleHandler()->getName($name);
       $build['#title'] = $module_name;
@@ -122,9 +122,9 @@ public function helpPage($name) {
         drupal_set_message($this->t('This module is experimental. <a href=":url">Experimental modules</a> are provided for testing purposes only. Use at your own risk.', [':url' => 'https://www.drupal.org/core/experimental']), 'warning');
       }
 
-      $temp = $this->moduleHandler()->invoke($name, 'help', array("help.page.$name", $this->routeMatch));
+      $temp = $this->moduleHandler()->invoke($name, 'help', ["help.page.$name", $this->routeMatch]);
       if (empty($temp)) {
-        $build['top'] = ['#markup' => $this->t('No help is available for module %module.', array('%module' => $module_name))];
+        $build['top'] = ['#markup' => $this->t('No help is available for module %module.', ['%module' => $module_name])];
       }
       else {
         if (!is_array($temp)) {
@@ -137,20 +137,20 @@ public function helpPage($name) {
       // any such pages associated with it.
       $admin_tasks = system_get_module_admin_tasks($name, system_get_info('module', $name));
       if (!empty($admin_tasks)) {
-        $links = array();
+        $links = [];
         foreach ($admin_tasks as $task) {
           $link['url'] = $task['url'];
           $link['title'] = $task['title'];
           $links[] = $link;
         }
-        $build['links'] = array(
+        $build['links'] = [
           '#theme' => 'links__help',
-          '#heading' => array(
+          '#heading' => [
             'level' => 'h3',
-            'text' => $this->t('@module administration pages', array('@module' => $module_name)),
-          ),
+            'text' => $this->t('@module administration pages', ['@module' => $module_name]),
+          ],
           '#links' => $links,
-        );
+        ];
       }
       return $build;
     }
diff --git a/core/modules/help/tests/modules/help_test/src/SupernovaGenerator.php b/core/modules/help/tests/modules/help_test/src/SupernovaGenerator.php
index a2d5e27db3a917b5528ed454062fa563857fcde2..9cdaa41858fba704fe83b0afa456d4f456957021 100644
--- a/core/modules/help/tests/modules/help_test/src/SupernovaGenerator.php
+++ b/core/modules/help/tests/modules/help_test/src/SupernovaGenerator.php
@@ -27,21 +27,21 @@ public function getContext() {
   /**
    * {@inheritdoc}
    */
-  public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH) {
+  public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH) {
     throw new \Exception();
   }
 
   /**
    * {@inheritdoc}
    */
-  public function getPathFromRoute($name, $parameters = array()) {
+  public function getPathFromRoute($name, $parameters = []) {
     throw new \Exception();
   }
 
   /**
    * {@inheritdoc}
    */
-  public function generateFromRoute($name, $parameters = array(), $options = array(), $collect_bubbleable_metadata = FALSE) {
+  public function generateFromRoute($name, $parameters = [], $options = [], $collect_bubbleable_metadata = FALSE) {
     throw new \Exception();
   }
 
@@ -55,7 +55,7 @@ public function supports($name) {
   /**
    * {@inheritdoc}
    */
-  public function getRouteDebugMessage($name, array $parameters = array()) {
+  public function getRouteDebugMessage($name, array $parameters = []) {
     throw new \Exception();
   }
 
diff --git a/core/modules/help/tests/src/Functional/ExperimentalHelpTest.php b/core/modules/help/tests/src/Functional/ExperimentalHelpTest.php
index 9d1a74eecdf3ede9f938fc8c3356661e86af121e..0eabbda56ba5a252ef348f9a254337f6920cd608 100644
--- a/core/modules/help/tests/src/Functional/ExperimentalHelpTest.php
+++ b/core/modules/help/tests/src/Functional/ExperimentalHelpTest.php
@@ -19,7 +19,7 @@ class ExperimentalHelpTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('help', 'experimental_module_test', 'help_page_test');
+  public static $modules = ['help', 'experimental_module_test', 'help_page_test'];
 
   /**
    * The admin user.
diff --git a/core/modules/help/tests/src/Functional/HelpTest.php b/core/modules/help/tests/src/Functional/HelpTest.php
index 2e82499398a8032ebb3dc54d0f4b1873317c91cc..e70eeb7665f26921bbe0c7b3df258c7609907e91 100644
--- a/core/modules/help/tests/src/Functional/HelpTest.php
+++ b/core/modules/help/tests/src/Functional/HelpTest.php
@@ -20,7 +20,7 @@ class HelpTest extends BrowserTestBase {
    *
    * @var array.
    */
-  public static $modules = array('help_test', 'help_page_test');
+  public static $modules = ['help_test', 'help_page_test'];
 
   /**
    * Use the Standard profile to test help implementations of many core modules.
@@ -41,8 +41,8 @@ protected function setUp() {
     parent::setUp();
 
     // Create users.
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'view the administration theme', 'administer permissions'));
-    $this->anyUser = $this->drupalCreateUser(array());
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'view the administration theme', 'administer permissions']);
+    $this->anyUser = $this->drupalCreateUser([]);
   }
 
   /**
@@ -61,7 +61,7 @@ public function testHelp() {
     // Verify that introductory help text exists, goes for 100% module coverage.
     $this->drupalLogin($this->adminUser);
     $this->drupalGet('admin/help');
-    $this->assertRaw(t('For more information, refer to the help listed on this page or to the <a href=":docs">online documentation</a> and <a href=":support">support</a> pages at <a href=":drupal">drupal.org</a>.', array(':docs' => 'https://www.drupal.org/documentation', ':support' => 'https://www.drupal.org/support', ':drupal' => 'https://www.drupal.org')));
+    $this->assertRaw(t('For more information, refer to the help listed on this page or to the <a href=":docs">online documentation</a> and <a href=":support">support</a> pages at <a href=":drupal">drupal.org</a>.', [':docs' => 'https://www.drupal.org/documentation', ':support' => 'https://www.drupal.org/support', ':drupal' => 'https://www.drupal.org']));
 
     // Verify that hook_help() section title and description appear.
     $this->assertRaw('<h2>' . t('Module overviews') . '</h2>');
@@ -74,13 +74,13 @@ public function testHelp() {
 
     // Make sure links are properly added for modules implementing hook_help().
     foreach ($this->getModuleList() as $module => $name) {
-      $this->assertLink($name, 0, format_string('Link properly added to @name (admin/help/@module)', array('@module' => $module, '@name' => $name)));
+      $this->assertLink($name, 0, format_string('Link properly added to @name (admin/help/@module)', ['@module' => $module, '@name' => $name]));
     }
 
     // Ensure that module which does not provide an module overview page is
     // handled correctly.
     $this->clickLink(\Drupal::moduleHandler()->getName('help_test'));
-    $this->assertRaw(t('No help is available for module %module.', array('%module' => \Drupal::moduleHandler()->getName('help_test'))));
+    $this->assertRaw(t('No help is available for module %module.', ['%module' => \Drupal::moduleHandler()->getName('help_test')]));
 
     // Verify that the order of topics is alphabetical by displayed module
     // name, by checking the order of some modules, including some that would
@@ -119,11 +119,11 @@ protected function verifyHelp($response = 200) {
       $this->drupalGet('admin/help/' . $module);
       $this->assertResponse($response);
       if ($response == 200) {
-        $this->assertTitle($name . ' | Drupal', format_string('%module title was displayed', array('%module' => $module)));
+        $this->assertTitle($name . ' | Drupal', format_string('%module title was displayed', ['%module' => $module]));
         $this->assertEquals($name, $this->cssSelect('h1.page-title')[0]->getText(), "$module heading was displayed");
         $admin_tasks = system_get_module_admin_tasks($module, system_get_info('module', $module));
         if (!empty($admin_tasks)) {
-          $this->assertText(t('@module administration pages', array('@module' => $name)));
+          $this->assertText(t('@module administration pages', ['@module' => $name]));
         }
         foreach ($admin_tasks as $task) {
           $this->assertLink($task['title']);
@@ -149,7 +149,7 @@ protected function verifyHelp($response = 200) {
    *   A list of enabled modules.
    */
   protected function getModuleList() {
-    $modules = array();
+    $modules = [];
     $module_data = system_rebuild_module_data();
     foreach (\Drupal::moduleHandler()->getImplementations('help') as $module) {
       $modules[$module] = $module_data[$module]->info['name'];
diff --git a/core/modules/help/tests/src/Functional/NoHelpTest.php b/core/modules/help/tests/src/Functional/NoHelpTest.php
index 49c768d7b6ac8dfa3a87ba1c2c6d8e2251b563b0..acb2563aee1ae722c85a3f1bac08c05e617882e6 100644
--- a/core/modules/help/tests/src/Functional/NoHelpTest.php
+++ b/core/modules/help/tests/src/Functional/NoHelpTest.php
@@ -18,7 +18,7 @@ class NoHelpTest extends BrowserTestBase {
    *
    * @var array.
    */
-  public static $modules = array('help', 'menu_test');
+  public static $modules = ['help', 'menu_test'];
 
   /**
    * The user who will be created.
@@ -27,7 +27,7 @@ class NoHelpTest extends BrowserTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages']);
   }
 
   /**
diff --git a/core/modules/history/history.install b/core/modules/history/history.install
index ede5255bc7b1f2810f90e34c725417bf53ebe728..8af53fe50dc735f698cc722ea65330f947d14d90 100644
--- a/core/modules/history/history.install
+++ b/core/modules/history/history.install
@@ -11,34 +11,34 @@
  * Implements hook_schema().
  */
 function history_schema() {
-  $schema['history'] = array(
+  $schema['history'] = [
     'description' => 'A record of which {users} have read which {node}s.',
-    'fields' => array(
-      'uid' => array(
+    'fields' => [
+      'uid' => [
         'description' => 'The {users}.uid that read the {node} nid.',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'nid' => array(
+      ],
+      'nid' => [
         'description' => 'The {node}.nid that was read.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'timestamp' => array(
+      ],
+      'timestamp' => [
         'description' => 'The Unix timestamp at which the read occurred.',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'primary key' => array('uid', 'nid'),
-    'indexes' => array(
-      'nid' => array('nid'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['uid', 'nid'],
+    'indexes' => [
+      'nid' => ['nid'],
+    ],
+  ];
 
   return $schema;
 }
@@ -56,43 +56,43 @@ function history_update_8101() {
   $schema = Database::getConnection()->schema();
   $schema->dropPrimaryKey('history');
   $schema->dropIndex('history', 'nid');
-  $schema->changeField('history', 'nid', 'nid', array(
+  $schema->changeField('history', 'nid', 'nid', [
     'description' => 'The {node}.nid that was read.',
     'type' => 'int',
     'unsigned' => TRUE,
     'not null' => TRUE,
     'default' => 0,
-  ));
-  $schema->addPrimaryKey('history', array('uid', 'nid'));
-  $spec = array(
+  ]);
+  $schema->addPrimaryKey('history', ['uid', 'nid']);
+  $spec = [
     'description' => 'A record of which {users} have read which {node}s.',
-    'fields' => array(
-      'uid' => array(
+    'fields' => [
+      'uid' => [
         'description' => 'The {users}.uid that read the {node} nid.',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'nid' => array(
+      ],
+      'nid' => [
         'description' => 'The {node}.nid that was read.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'timestamp' => array(
+      ],
+      'timestamp' => [
         'description' => 'The Unix timestamp at which the read occurred.',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'primary key' => array('uid', 'nid'),
-    'indexes' => array(
-      'nid' => array('nid'),
-    ),
-  );
-  $schema->addIndex('history', 'nid', array('nid'), $spec);
+      ],
+    ],
+    'primary key' => ['uid', 'nid'],
+    'indexes' => [
+      'nid' => ['nid'],
+    ],
+  ];
+  $schema->addIndex('history', 'nid', ['nid'], $spec);
 }
 
 /**
diff --git a/core/modules/history/history.module b/core/modules/history/history.module
index a31dd5befe0c7a26c7ed568d30f28c169a20b37e..58f40de3e772f600ae31205481326209fe6a6729 100644
--- a/core/modules/history/history.module
+++ b/core/modules/history/history.module
@@ -28,7 +28,7 @@ function history_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.history':
       $output  = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The History module keeps track of which content a user has read. It marks content as <em>new</em> or <em>updated</em> depending on the last time the user viewed it. History records that are older than one month are removed during cron, which means that content older than one month is always considered <em>read</em>. The History module does not have a user interface but it provides a filter to <a href=":views-help">Views</a> to show new or updated content. For more information, see the <a href=":url">online documentation for the History module</a>.', array(':views-help' => (\Drupal::moduleHandler()->moduleExists('views')) ? \Drupal::url('help.page', array ('name' => 'views')) : '#', ':url' => 'https://www.drupal.org/documentation/modules/history')) . '</p>';
+      $output .= '<p>' . t('The History module keeps track of which content a user has read. It marks content as <em>new</em> or <em>updated</em> depending on the last time the user viewed it. History records that are older than one month are removed during cron, which means that content older than one month is always considered <em>read</em>. The History module does not have a user interface but it provides a filter to <a href=":views-help">Views</a> to show new or updated content. For more information, see the <a href=":url">online documentation for the History module</a>.', [':views-help' => (\Drupal::moduleHandler()->moduleExists('views')) ? \Drupal::url('help.page',  ['name' => 'views']) : '#', ':url' => 'https://www.drupal.org/documentation/modules/history']) . '</p>';
       return $output;
   }
 }
@@ -44,7 +44,7 @@ function history_help($route_name, RouteMatchInterface $route_match) {
  *   of when the last view occurred; otherwise, zero.
  */
 function history_read($nid) {
-  $history = history_read_multiple(array($nid));
+  $history = history_read_multiple([$nid]);
   return $history[$nid];
 }
 
@@ -60,11 +60,11 @@ function history_read($nid) {
  *   otherwise, zero.
  */
 function history_read_multiple($nids) {
-  $history = &drupal_static(__FUNCTION__, array());
+  $history = &drupal_static(__FUNCTION__, []);
 
-  $return = array();
+  $return = [];
 
-  $nodes_to_read = array();
+  $nodes_to_read = [];
   foreach ($nids as $nid) {
     if (isset($history[$nid])) {
       $return[$nid] = $history[$nid];
@@ -79,10 +79,10 @@ function history_read_multiple($nids) {
     return $return;
   }
 
-  $result = db_query('SELECT nid, timestamp FROM {history} WHERE uid = :uid AND nid IN ( :nids[] )', array(
+  $result = db_query('SELECT nid, timestamp FROM {history} WHERE uid = :uid AND nid IN ( :nids[] )', [
     ':uid' => \Drupal::currentUser()->id(),
     ':nids[]' => array_keys($nodes_to_read),
-  ));
+  ]);
   foreach ($result as $row) {
     $nodes_to_read[$row->nid] = (int) $row->timestamp;
   }
@@ -108,14 +108,14 @@ function history_write($nid, $account = NULL) {
 
   if ($account->isAuthenticated()) {
     db_merge('history')
-      ->keys(array(
+      ->keys([
         'uid' => $account->id(),
         'nid' => $nid,
-      ))
-      ->fields(array('timestamp' => REQUEST_TIME))
+      ])
+      ->fields(['timestamp' => REQUEST_TIME])
       ->execute();
     // Update static cache.
-    $history = &drupal_static('history_read_multiple', array());
+    $history = &drupal_static('history_read_multiple', []);
     $history[$nid] = REQUEST_TIME;
   }
 }
diff --git a/core/modules/history/history.views.inc b/core/modules/history/history.views.inc
index 4b9813645d509160b6b659af3ec6543b83551d4c..a4dcd99275300e81fc328c20932f906fe4a72418 100644
--- a/core/modules/history/history.views.inc
+++ b/core/modules/history/history.views.inc
@@ -17,29 +17,29 @@ function history_views_data() {
   $data['history']['table']['group']  = t('Content');
 
   // Explain how this table joins to others.
-  $data['history']['table']['join'] = array(
+  $data['history']['table']['join'] = [
      // Directly links to node table.
-    'node_field_data' => array(
+    'node_field_data' => [
       'table' => 'history',
       'left_field' => 'nid',
       'field' => 'nid',
-      'extra' => array(
-        array('field' => 'uid', 'value' => '***CURRENT_USER***', 'numeric' => TRUE),
-      ),
-    ),
-  );
+      'extra' => [
+        ['field' => 'uid', 'value' => '***CURRENT_USER***', 'numeric' => TRUE],
+      ],
+    ],
+  ];
 
-  $data['history']['timestamp'] = array(
+  $data['history']['timestamp'] = [
     'title' => t('Has new content'),
-    'field' => array(
+    'field' => [
       'id' => 'history_user_timestamp',
       'help' => t('Show a marker if the content is new or updated.'),
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'help' => t('Show only content that is new or updated.'),
       'id' => 'history_user_timestamp',
-    ),
-  );
+    ],
+  ];
 
   return $data;
 }
diff --git a/core/modules/history/src/Plugin/views/field/HistoryUserTimestamp.php b/core/modules/history/src/Plugin/views/field/HistoryUserTimestamp.php
index e6b0548f0a4e87988d6d3c6ec03f14f189c543ca..f33dab25aa52521a7d581a998bc2402ad15db096 100644
--- a/core/modules/history/src/Plugin/views/field/HistoryUserTimestamp.php
+++ b/core/modules/history/src/Plugin/views/field/HistoryUserTimestamp.php
@@ -34,10 +34,10 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
     parent::init($view, $display, $options);
 
     if (\Drupal::currentUser()->isAuthenticated()) {
-      $this->additional_fields['created'] = array('table' => 'node_field_data', 'field' => 'created');
-      $this->additional_fields['changed'] = array('table' => 'node_field_data', 'field' => 'changed');
+      $this->additional_fields['created'] = ['table' => 'node_field_data', 'field' => 'created'];
+      $this->additional_fields['changed'] = ['table' => 'node_field_data', 'field' => 'changed'];
       if (\Drupal::moduleHandler()->moduleExists('comment') && !empty($this->options['comments'])) {
-        $this->additional_fields['last_comment'] = array('table' => 'comment_entity_statistics', 'field' => 'last_comment_timestamp');
+        $this->additional_fields['last_comment'] = ['table' => 'comment_entity_statistics', 'field' => 'last_comment_timestamp'];
       }
     }
   }
@@ -45,7 +45,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['comments'] = array('default' => FALSE);
+    $options['comments'] = ['default' => FALSE];
 
     return $options;
   }
@@ -53,11 +53,11 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
     if (\Drupal::moduleHandler()->moduleExists('comment')) {
-      $form['comments'] = array(
+      $form['comments'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Check for new comments as well'),
         '#default_value' => !empty($this->options['comments']),
-      );
+      ];
     }
   }
 
@@ -92,10 +92,10 @@ public function render(ResultRow $values) {
       elseif ($last_comment > $last_read && $last_comment > HISTORY_READ_LIMIT) {
         $mark = MARK_UPDATED;
       }
-      $build = array(
+      $build = [
         '#theme' => 'mark',
         '#status' => $mark,
-      );
+      ];
       return $this->renderLink(drupal_render($build), $values);
     }
   }
diff --git a/core/modules/history/src/Plugin/views/filter/HistoryUserTimestamp.php b/core/modules/history/src/Plugin/views/filter/HistoryUserTimestamp.php
index 80d78bd6e7dfe1cdca07cc692faa4f55b0dd1bed..92a57991ca7bfc7aa6c491542a61efeb1972b20f 100644
--- a/core/modules/history/src/Plugin/views/filter/HistoryUserTimestamp.php
+++ b/core/modules/history/src/Plugin/views/filter/HistoryUserTimestamp.php
@@ -49,11 +49,11 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
       else {
         $label = $this->t('Has new content');
       }
-      $form['value'] = array(
+      $form['value'] = [
         '#type' => 'checkbox',
         '#title' => $label,
         '#default_value' => $this->value,
-      );
+      ];
     }
   }
 
diff --git a/core/modules/history/src/Tests/HistoryTest.php b/core/modules/history/src/Tests/HistoryTest.php
index 17bba34062b6817dcc9b4ce13c45bdcdb2ad5c01..d08d21129444b2a35f2cf1f34a2f2b1e07c0f124 100644
--- a/core/modules/history/src/Tests/HistoryTest.php
+++ b/core/modules/history/src/Tests/HistoryTest.php
@@ -17,7 +17,7 @@ class HistoryTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'history');
+  public static $modules = ['node', 'history'];
 
   /**
    * The main user for testing.
@@ -36,11 +36,11 @@ class HistoryTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
-    $this->user = $this->drupalCreateUser(array('create page content', 'access content'));
+    $this->user = $this->drupalCreateUser(['create page content', 'access content']);
     $this->drupalLogin($this->user);
-    $this->testNode = $this->drupalCreateNode(array('type' => 'page', 'uid' => $this->user->id()));
+    $this->testNode = $this->drupalCreateNode(['type' => 'page', 'uid' => $this->user->id()]);
   }
 
   /**
@@ -54,7 +54,7 @@ protected function setUp() {
    */
   protected function getNodeReadTimestamps(array $node_ids) {
     // Build POST values.
-    $post = array();
+    $post = [];
     for ($i = 0; $i < count($node_ids); $i++) {
       $post['node_ids[' . $i . ']'] = $node_ids[$i];
     }
@@ -69,15 +69,15 @@ protected function getNodeReadTimestamps(array $node_ids) {
     $post = implode('&', $post);
 
     // Perform HTTP request.
-    return $this->curlExec(array(
-      CURLOPT_URL => \Drupal::url('history.get_last_node_view', array(), array('absolute' => TRUE)),
+    return $this->curlExec([
+      CURLOPT_URL => \Drupal::url('history.get_last_node_view', [], ['absolute' => TRUE]),
       CURLOPT_POST => TRUE,
       CURLOPT_POSTFIELDS => $post,
-      CURLOPT_HTTPHEADER => array(
+      CURLOPT_HTTPHEADER => [
         'Accept: application/json',
         'Content-Type: application/x-www-form-urlencoded',
-      ),
-    ));
+      ],
+    ]);
   }
 
   /**
@@ -90,12 +90,12 @@ protected function getNodeReadTimestamps(array $node_ids) {
    *   The response body.
    */
   protected function markNodeAsRead($node_id) {
-    return $this->curlExec(array(
-      CURLOPT_URL => \Drupal::url('history.read_node', array('node' => $node_id), array('absolute' => TRUE)),
-      CURLOPT_HTTPHEADER => array(
+    return $this->curlExec([
+      CURLOPT_URL => \Drupal::url('history.read_node', ['node' => $node_id], ['absolute' => TRUE]),
+      CURLOPT_HTTPHEADER => [
         'Accept: application/json',
-      ),
-    ));
+      ],
+    ]);
   }
 
   /**
@@ -105,10 +105,10 @@ function testHistory() {
     $nid = $this->testNode->id();
 
     // Retrieve "last read" timestamp for test node, for the current user.
-    $response = $this->getNodeReadTimestamps(array($nid));
+    $response = $this->getNodeReadTimestamps([$nid]);
     $this->assertResponse(200);
     $json = Json::decode($response);
-    $this->assertIdentical(array(1 => 0), $json, 'The node has not yet been read.');
+    $this->assertIdentical([1 => 0], $json, 'The node has not yet been read.');
 
     // View the node.
     $this->drupalGet('node/' . $nid);
@@ -126,20 +126,20 @@ function testHistory() {
     $this->assertTrue(is_numeric($timestamp), 'Node has been marked as read. Timestamp received.');
 
     // Retrieve "last read" timestamp for test node, for the current user.
-    $response = $this->getNodeReadTimestamps(array($nid));
+    $response = $this->getNodeReadTimestamps([$nid]);
     $this->assertResponse(200);
     $json = Json::decode($response);
-    $this->assertIdentical(array(1 => $timestamp), $json, 'The node has been read.');
+    $this->assertIdentical([1 => $timestamp], $json, 'The node has been read.');
 
     // Failing to specify node IDs for the first endpoint should return a 404.
-    $this->getNodeReadTimestamps(array());
+    $this->getNodeReadTimestamps([]);
     $this->assertResponse(404);
 
     // Accessing either endpoint as the anonymous user should return a 403.
     $this->drupalLogout();
-    $this->getNodeReadTimestamps(array($nid));
+    $this->getNodeReadTimestamps([$nid]);
     $this->assertResponse(403);
-    $this->getNodeReadTimestamps(array());
+    $this->getNodeReadTimestamps([]);
     $this->assertResponse(403);
     $this->markNodeAsRead($nid);
     $this->assertResponse(403);
diff --git a/core/modules/history/src/Tests/Views/HistoryTimestampTest.php b/core/modules/history/src/Tests/Views/HistoryTimestampTest.php
index 0f484014b0a249abd6baf9aee9631d21c8e29efc..476653839285115b2b42d7b965af3dbef47b0f74 100644
--- a/core/modules/history/src/Tests/Views/HistoryTimestampTest.php
+++ b/core/modules/history/src/Tests/Views/HistoryTimestampTest.php
@@ -19,20 +19,20 @@ class HistoryTimestampTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('history', 'node');
+  public static $modules = ['history', 'node'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_history');
+  public static $testViews = ['test_history'];
 
   /**
    * Tests the handlers.
    */
   public function testHandlers() {
-    $nodes = array();
+    $nodes = [];
     $nodes[] = $this->drupalCreateNode();
     $nodes[] = $this->drupalCreateNode();
 
@@ -41,23 +41,23 @@ public function testHandlers() {
     \Drupal::currentUser()->setAccount($account);
 
     db_insert('history')
-      ->fields(array(
+      ->fields([
         'uid' => $account->id(),
         'nid' => $nodes[0]->id(),
         'timestamp' => REQUEST_TIME - 100,
-      ))->execute();
+      ])->execute();
 
     db_insert('history')
-      ->fields(array(
+      ->fields([
         'uid' => $account->id(),
         'nid' => $nodes[1]->id(),
         'timestamp' => REQUEST_TIME + 100,
-      ))->execute();
+      ])->execute();
 
 
-    $column_map = array(
+    $column_map = [
       'nid' => 'nid',
-    );
+    ];
 
     // Test the history field.
     $view = Views::getView('test_history');
@@ -66,7 +66,7 @@ public function testHandlers() {
     $this->assertEqual(count($view->result), 2);
     $output = $view->preview();
     $this->setRawContent(\Drupal::service('renderer')->renderRoot($output));
-    $result = $this->xpath('//span[@class=:class]', array(':class' => 'marker'));
+    $result = $this->xpath('//span[@class=:class]', [':class' => 'marker']);
     $this->assertEqual(count($result), 1, 'Just one node is marked as new');
 
     // Test the history filter.
@@ -74,7 +74,7 @@ public function testHandlers() {
     $view->setDisplay('page_2');
     $this->executeView($view);
     $this->assertEqual(count($view->result), 1);
-    $this->assertIdenticalResultset($view, array(array('nid' => $nodes[0]->id())), $column_map);
+    $this->assertIdenticalResultset($view, [['nid' => $nodes[0]->id()]], $column_map);
 
     // Install Comment module and make sure that content types without comment
     // field will not break the view.
diff --git a/core/modules/image/image.admin.inc b/core/modules/image/image.admin.inc
index 777e43855a4124e29ed5ca0bf866c14e61470618..e43bd48765fb32fbba9b6903d5c06016d8c69c1b 100644
--- a/core/modules/image/image.admin.inc
+++ b/core/modules/image/image.admin.inc
@@ -33,11 +33,11 @@ function template_preprocess_image_style_preview(&$variables) {
   // Set up original file information.
   $original_path = \Drupal::config('image.settings')->get('preview_image');
   $original_image = $image_factory->get($original_path);
-  $variables['original'] = array(
+  $variables['original'] = [
     'url' => file_url_transform_relative(file_create_url($original_path)),
     'width' => $original_image->getWidth(),
     'height' => $original_image->getHeight(),
-  );
+  ];
   if ($variables['original']['width'] > $variables['original']['height']) {
     $variables['preview']['original']['width'] = min($variables['original']['width'], $sample_width);
     $variables['preview']['original']['height'] = round($variables['preview']['original']['width'] / $variables['original']['width'] * $variables['original']['height']);
@@ -54,11 +54,11 @@ function template_preprocess_image_style_preview(&$variables) {
     $style->createDerivative($original_path, $preview_file);
   }
   $preview_image = $image_factory->get($preview_file);
-  $variables['derivative'] = array(
+  $variables['derivative'] = [
     'url' => file_url_transform_relative(file_create_url($preview_file)),
     'width' => $preview_image->getWidth(),
     'height' => $preview_image->getHeight(),
-  );
+  ];
   if ($variables['derivative']['width'] > $variables['derivative']['height']) {
     $variables['preview']['derivative']['width'] = min($variables['derivative']['width'], $sample_width);
     $variables['preview']['derivative']['height'] = round($variables['preview']['derivative']['width'] / $variables['derivative']['width'] * $variables['derivative']['height']);
@@ -69,31 +69,31 @@ function template_preprocess_image_style_preview(&$variables) {
   }
 
   // Build the preview of the original image.
-  $variables['original']['rendered'] = array(
+  $variables['original']['rendered'] = [
     '#theme' => 'image',
     '#uri' => $original_path,
     '#alt' => t('Sample original image'),
     '#title' => '',
-    '#attributes' => array(
+    '#attributes' => [
       'width' => $variables['original']['width'],
       'height' => $variables['original']['height'],
       'style' => 'width: ' . $variables['preview']['original']['width'] . 'px; height: ' . $variables['preview']['original']['height'] . 'px;',
-    ),
-  );
+    ],
+  ];
 
   // Build the preview of the image style derivative. Timestamps are added
   // to prevent caching of images on the client side.
-  $variables['derivative']['rendered'] = array(
+  $variables['derivative']['rendered'] = [
     '#theme' => 'image',
     '#uri' => $variables['derivative']['url'] . '?cache_bypass=' . $variables['cache_bypass'],
     '#alt' => t('Sample modified image'),
     '#title' => '',
-    '#attributes' => array(
+    '#attributes' => [
       'width' => $variables['derivative']['width'],
       'height' => $variables['derivative']['height'],
       'style' => 'width: ' . $variables['preview']['derivative']['width'] . 'px; height: ' . $variables['preview']['derivative']['height'] . 'px;',
-    ),
-  );
+    ],
+  ];
 
 }
 
@@ -109,26 +109,26 @@ function template_preprocess_image_style_preview(&$variables) {
 function template_preprocess_image_anchor(&$variables) {
   $element = $variables['element'];
 
-  $rows = array();
-  $row = array();
+  $rows = [];
+  $row = [];
   foreach (Element::children($element) as $n => $key) {
     $element[$key]['#attributes']['title'] = $element[$key]['#title'];
     unset($element[$key]['#title']);
-    $row[] = array(
+    $row[] = [
       'data' => $element[$key],
-    );
+    ];
     if ($n % 3 == 3 - 1) {
       $rows[] = $row;
-      $row = array();
+      $row = [];
     }
   }
 
-  $variables['table'] = array(
+  $variables['table'] = [
     '#type' => 'table',
-    '#header' => array(),
+    '#header' => [],
     '#rows' => $rows,
-    '#attributes' => array(
-      'class' => array('image-anchor'),
-    ),
-  );
+    '#attributes' => [
+      'class' => ['image-anchor'],
+    ],
+  ];
 }
diff --git a/core/modules/image/image.field.inc b/core/modules/image/image.field.inc
index 1bf4369e7bd6b4feb32c0a149f137b31d94c389f..9fcdf69116c561ee85f7b892d85d05e9b7ddac90 100644
--- a/core/modules/image/image.field.inc
+++ b/core/modules/image/image.field.inc
@@ -20,14 +20,14 @@
 function template_preprocess_image_widget(&$variables) {
   $element = $variables['element'];
 
-  $variables['attributes'] = array('class' => array('image-widget', 'js-form-managed-file', 'form-managed-file', 'clearfix'));
+  $variables['attributes'] = ['class' => ['image-widget', 'js-form-managed-file', 'form-managed-file', 'clearfix']];
 
   if (!empty($element['fids']['#value'])) {
     $file = reset($element['#files']);
     $element['file_' . $file->id()]['filename']['#suffix'] = ' <span class="file-size">(' . format_size($file->getSize()) . ')</span> ';
   }
 
-  $variables['data'] = array();
+  $variables['data'] = [];
   foreach (Element::children($element) as $child) {
     $variables['data'][$child] = $element[$child];
   }
@@ -49,15 +49,15 @@ function template_preprocess_image_widget(&$variables) {
  */
 function template_preprocess_image_formatter(&$variables) {
   if ($variables['image_style']) {
-    $variables['image'] = array(
+    $variables['image'] = [
       '#theme' => 'image_style',
       '#style_name' => $variables['image_style'],
-    );
+    ];
   }
   else {
-    $variables['image'] = array(
+    $variables['image'] = [
       '#theme' => 'image',
-    );
+    ];
   }
   $variables['image']['#attributes'] = $variables['item_attributes'];
 
@@ -75,7 +75,7 @@ function template_preprocess_image_formatter(&$variables) {
     $variables['image']['#uri'] = $item->uri;
   }
 
-  foreach (array('width', 'height', 'alt') as $key) {
+  foreach (['width', 'height', 'alt'] as $key) {
     $variables['image']["#$key"] = $item->$key;
   }
 }
diff --git a/core/modules/image/image.install b/core/modules/image/image.install
index c044912ef1dec8603a85035d75f637b0aa5dff36..d7a2ce7dcaa4b8ae2a8422700d73135e92a7d7c4 100644
--- a/core/modules/image/image.install
+++ b/core/modules/image/image.install
@@ -29,19 +29,19 @@ function image_uninstall() {
  */
 function image_requirements($phase) {
   if ($phase != 'runtime') {
-    return array();
+    return [];
   }
 
   $toolkit = \Drupal::service('image.toolkit.manager')->getDefaultToolkit();
   if ($toolkit) {
     $plugin_definition = $toolkit->getPluginDefinition();
-    $requirements = array(
-      'image.toolkit' => array(
+    $requirements = [
+      'image.toolkit' => [
         'title' => t('Image toolkit'),
         'value' => $toolkit->getPluginId(),
         'description' => $plugin_definition['title'],
-      ),
-    );
+      ],
+    ];
 
     foreach ($toolkit->getRequirements() as $key => $requirement) {
       $namespaced_key = 'image.toolkit.' . $toolkit->getPluginId() . '.' . $key;
@@ -49,14 +49,14 @@ function image_requirements($phase) {
     }
   }
   else {
-    $requirements = array(
-      'image.toolkit' => array(
+    $requirements = [
+      'image.toolkit' => [
         'title' => t('Image toolkit'),
         'value' => t('None'),
         'description' => t("No image toolkit is configured on the site. Check PHP installed extensions or add a contributed toolkit that doesn't require a PHP extension. Make sure that at least one valid image toolkit is enabled."),
         'severity' => REQUIREMENT_ERROR,
-      ),
-    );
+      ],
+    ];
   }
 
   return $requirements;
diff --git a/core/modules/image/image.module b/core/modules/image/image.module
index 33ecf2e9876bfafe36d5d27e6536e868cd975916..6107ecd909ec81a108ef25f0bf253cae5eba369d 100644
--- a/core/modules/image/image.module
+++ b/core/modules/image/image.module
@@ -58,20 +58,20 @@
 function image_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.image':
-      $field_ui_url = \Drupal::moduleHandler()->moduleExists('field_ui') ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#';
+      $field_ui_url = \Drupal::moduleHandler()->moduleExists('field_ui') ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#';
 
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Image module allows you to create fields that contain image files and to configure <a href=":image_styles">Image styles</a> that can be used to manipulate the display of images. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for terminology and general information on entities, fields, and how to create and manage fields. For more information, see the <a href=":image_documentation">online documentation for the Image module</a>.', array(':image_styles' => \Drupal::url('entity.image_style.collection'), ':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => $field_ui_url, ':image_documentation' => 'https://www.drupal.org/documentation/modules/image')) . '</p>';
+      $output .= '<p>' . t('The Image module allows you to create fields that contain image files and to configure <a href=":image_styles">Image styles</a> that can be used to manipulate the display of images. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for terminology and general information on entities, fields, and how to create and manage fields. For more information, see the <a href=":image_documentation">online documentation for the Image module</a>.', [':image_styles' => \Drupal::url('entity.image_style.collection'), ':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => $field_ui_url, ':image_documentation' => 'https://www.drupal.org/documentation/modules/image']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dt>' . t('Defining image styles') . '</dt>';
-      $output .= '<dd>' . t('The concept of image styles is that you can upload a single image but display it in several ways; each display variation, or <em>image style</em>, is the result of applying one or more <em>effects</em> to the original image. As an example, you might upload a high-resolution image with a 4:3 aspect ratio, and display it scaled down, square cropped, or black-and-white (or any combination of these effects). The Image module provides a way to do this efficiently: you configure an image style with the desired effects on the <a href=":image">Image styles page</a>, and the first time a particular image is requested in that style, the effects are applied. The resulting image is saved, and the next time that same style is requested, the saved image is retrieved without the need to recalculate the effects. Drupal core provides several effects that you can use to define styles; others may be provided by contributed modules.', array(':image' => \Drupal::url('entity.image_style.collection')));
+      $output .= '<dd>' . t('The concept of image styles is that you can upload a single image but display it in several ways; each display variation, or <em>image style</em>, is the result of applying one or more <em>effects</em> to the original image. As an example, you might upload a high-resolution image with a 4:3 aspect ratio, and display it scaled down, square cropped, or black-and-white (or any combination of these effects). The Image module provides a way to do this efficiently: you configure an image style with the desired effects on the <a href=":image">Image styles page</a>, and the first time a particular image is requested in that style, the effects are applied. The resulting image is saved, and the next time that same style is requested, the saved image is retrieved without the need to recalculate the effects. Drupal core provides several effects that you can use to define styles; others may be provided by contributed modules.', [':image' => \Drupal::url('entity.image_style.collection')]);
       $output .= '<dt>' . t('Naming image styles') . '</dt>';
       $output .= '<dd>' . t('When you define an image style, you will need to choose a displayed name and a machine name. The displayed name is shown in administrative pages, and the machine name is used to generate the URL for accessing an image processed in that style. There are two common approaches to naming image styles: either based on the effects being applied (for example, <em>Square 85x85</em>), or based on where you plan to use it (for example, <em>Profile picture</em>).') . '</dd>';
       $output .= '<dt>' . t('Configuring image fields') . '</dt>';
       $output .= '<dd>' . t('A few of the settings for image fields are defined once when you create the field and cannot be changed later; these include the choice of public or private file storage and the number of images that can be stored in the field. The rest of the settings can be edited later; these settings include the field label, help text, allowed file extensions, image resolution restrictions, and the subdirectory in the public or private file storage where the images will be stored. The editable settings can also have different values for different entity sub-types; for instance, if your image field is used on both Page and Article content types, you can store the files in a different subdirectory for the two content types.') . '</dd>';
       $output .= '<dd>' . t('For accessibility and search engine optimization, all images that convey meaning on web sites should have alternate text. Drupal also allows entry of title text for images, but it can lead to confusion for screen reader users and its use is not recommended. Image fields can be configured so that alternate and title text fields are enabled or disabled; if enabled, the fields can be set to be required. The recommended setting is to enable and require alternate text and disable title text.') . '</dd>';
-      $output .= '<dd>' . t('When you create an image field, you will need to choose whether the uploaded images will be stored in the public or private file directory defined in your settings.php file and shown on the <a href=":file-system">File system page</a>. This choice cannot be changed later. You can also configure your field to store files in a subdirectory of the public or private directory; this setting can be changed later and can be different for each entity sub-type using the field. For more information on file storage, see the <a href=":system-help">System module help page</a>.', array(':file-system' => \Drupal::url('system.file_system_settings'), ':system-help' => \Drupal::url('help.page', array('name' => 'system')))) . '</dd>';
+      $output .= '<dd>' . t('When you create an image field, you will need to choose whether the uploaded images will be stored in the public or private file directory defined in your settings.php file and shown on the <a href=":file-system">File system page</a>. This choice cannot be changed later. You can also configure your field to store files in a subdirectory of the public or private directory; this setting can be changed later and can be different for each entity sub-type using the field. For more information on file storage, see the <a href=":system-help">System module help page</a>.', [':file-system' => \Drupal::url('system.file_system_settings'), ':system-help' => \Drupal::url('help.page', ['name' => 'system'])]) . '</dd>';
       $output .= '<dd>' . t('The maximum file size that can be uploaded is limited by PHP settings of the server, but you can restrict it further by configuring a <em>Maximum upload size</em> in the field settings (this setting can be changed later). The maximum file size, either from PHP server settings or field configuration, is automatically displayed to users in the help text of the image field.') . '</dd>';
       $output .= '<dd>' . t('You can also configure a minimum and/or maximum resolution for uploaded images. Images that are too small will be rejected. Images that are to large will be resized. During the resizing the <a href="http://wikipedia.org/wiki/Exchangeable_image_file_format">EXIF data</a> in the image will be lost.') . '</dd>';
       $output .= '<dd>' . t('You can also configure a default image that will be used if no image is uploaded in an image field. This default can be defined for all instances of the field in the field storage settings when you create a field, and the setting can be overridden for each entity sub-type that uses the field.') . '</dd>';
@@ -98,9 +98,9 @@ function image_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function image_theme() {
-  return array(
+  return [
     // Theme functions in image.module.
-    'image_style' => array(
+    'image_style' => [
       // HTML 4 and XHTML 1.0 always require an alt attribute. The HTML 5 draft
       // allows the alt attribute to be omitted in some cases. Therefore,
       // default the alt attribute to an empty string, but allow code using
@@ -113,49 +113,49 @@ function image_theme() {
       // - http://dev.w3.org/html5/spec/Overview.html#alt
       // The title attribute is optional in all cases, so it is omitted by
       // default.
-      'variables' => array(
+      'variables' => [
         'style_name' => NULL,
         'uri' => NULL,
         'width' => NULL,
         'height' => NULL,
         'alt' => '',
         'title' => NULL,
-        'attributes' => array(),
-      ),
-    ),
+        'attributes' => [],
+      ],
+    ],
 
     // Theme functions in image.admin.inc.
-    'image_style_preview' => array(
-      'variables' => array('style' => NULL),
+    'image_style_preview' => [
+      'variables' => ['style' => NULL],
       'file' => 'image.admin.inc',
-    ),
-    'image_anchor' => array(
+    ],
+    'image_anchor' => [
       'render element' => 'element',
       'file' => 'image.admin.inc',
-    ),
-    'image_resize_summary' => array(
-      'variables' => array('data' => NULL, 'effect' => array()),
-    ),
-    'image_scale_summary' => array(
-      'variables' => array('data' => NULL, 'effect' => array()),
-    ),
-    'image_crop_summary' => array(
-      'variables' => array('data' => NULL, 'effect' => array()),
-    ),
-    'image_rotate_summary' => array(
-      'variables' => array('data' => NULL, 'effect' => array()),
-    ),
+    ],
+    'image_resize_summary' => [
+      'variables' => ['data' => NULL, 'effect' => []],
+    ],
+    'image_scale_summary' => [
+      'variables' => ['data' => NULL, 'effect' => []],
+    ],
+    'image_crop_summary' => [
+      'variables' => ['data' => NULL, 'effect' => []],
+    ],
+    'image_rotate_summary' => [
+      'variables' => ['data' => NULL, 'effect' => []],
+    ],
 
     // Theme functions in image.field.inc.
-    'image_widget' => array(
+    'image_widget' => [
       'render element' => 'element',
       'file' => 'image.field.inc',
-    ),
-    'image_formatter' => array(
-      'variables' => array('item' => NULL, 'item_attributes' => NULL, 'url' => NULL, 'image_style' => NULL),
+    ],
+    'image_formatter' => [
+      'variables' => ['item' => NULL, 'item_attributes' => NULL, 'url' => NULL, 'image_style' => NULL],
       'file' => 'image.field.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -180,17 +180,17 @@ function image_file_download($uri) {
     $image = \Drupal::service('image.factory')->get($uri);
     if ($image->isValid()) {
       // Check the permissions of the original to grant access to this image.
-      $headers = \Drupal::moduleHandler()->invokeAll('file_download', array($original_uri));
+      $headers = \Drupal::moduleHandler()->invokeAll('file_download', [$original_uri]);
       // Confirm there's at least one module granting access and none denying access.
       if (!empty($headers) && !in_array(-1, $headers)) {
-        return array(
+        return [
           // Send headers describing the image's size, and MIME-type.
           'Content-Type' => $image->getMimeType(),
           'Content-Length' => $image->getFileSize(),
           // By not explicitly setting them here, this uses normal Drupal
           // Expires, Cache-Control and ETag headers to prevent proxy or
           // browser caching of private images.
-        );
+        ];
       }
     }
     return -1;
@@ -236,7 +236,7 @@ function image_path_flush($path) {
  */
 function image_style_options($include_empty = TRUE) {
   $styles = ImageStyle::loadMultiple();
-  $options = array();
+  $options = [];
   if ($include_empty && !empty($styles)) {
     $options[''] = t('- None -');
   }
@@ -280,21 +280,21 @@ function template_preprocess_image_style(&$variables) {
   $style = ImageStyle::load($variables['style_name']);
 
   // Determine the dimensions of the styled image.
-  $dimensions = array(
+  $dimensions = [
     'width' => $variables['width'],
     'height' => $variables['height'],
-  );
+  ];
 
   $style->transformDimensions($dimensions, $variables['uri']);
 
-  $variables['image'] = array(
+  $variables['image'] = [
     '#theme' => 'image',
     '#width' => $dimensions['width'],
     '#height' => $dimensions['height'],
     '#attributes' => $variables['attributes'],
     '#uri' => $style->buildUrl($variables['uri']),
     '#style_name' => $variables['style_name'],
-  );
+  ];
 
   if (isset($variables['alt']) || array_key_exists('alt', $variables)) {
     $variables['image']['#alt'] = $variables['alt'];
diff --git a/core/modules/image/image.views.inc b/core/modules/image/image.views.inc
index 29e6b6a6bb21686fa1f4acad3addc2f2d037de14..cca0e3d904de6be0ac674b2b1d83650d773cd8e4 100644
--- a/core/modules/image/image.views.inc
+++ b/core/modules/image/image.views.inc
@@ -19,13 +19,13 @@ function image_field_views_data(FieldStorageConfigInterface $field_storage) {
   $data = views_field_default_views_data($field_storage);
   foreach ($data as $table_name => $table_data) {
     // Add the relationship only on the target_id field.
-    $data[$table_name][$field_storage->getName() . '_target_id']['relationship'] = array(
+    $data[$table_name][$field_storage->getName() . '_target_id']['relationship'] = [
       'id' => 'standard',
       'base' => 'file_managed',
       'entity type' => 'file',
       'base field' => 'fid',
-      'label' => t('image from @field_name', array('@field_name' => $field_storage->getName())),
-    );
+      'label' => t('image from @field_name', ['@field_name' => $field_storage->getName()]),
+    ];
   }
 
   return $data;
@@ -47,10 +47,10 @@ function image_field_views_data_views_data_alter(array &$data, FieldStorageConfi
 
   list($label) = views_entity_field_label($entity_type_id, $field_name);
 
-  $data['file_managed'][$pseudo_field_name]['relationship'] = array(
-    'title' => t('@entity using @field', array('@entity' => $entity_type->getLabel(), '@field' => $label)),
-    'label' => t('@field_name', array('@field_name' => $field_name)),
-    'help' => t('Relate each @entity with a @field set to the image.', array('@entity' => $entity_type->getLabel(), '@field' => $label)),
+  $data['file_managed'][$pseudo_field_name]['relationship'] = [
+    'title' => t('@entity using @field', ['@entity' => $entity_type->getLabel(), '@field' => $label]),
+    'label' => t('@field_name', ['@field_name' => $field_name]),
+    'help' => t('Relate each @entity with a @field set to the image.', ['@entity' => $entity_type->getLabel(), '@field' => $label]),
     'group' => $entity_type->getLabel(),
     'id' => 'entity_reverse',
     'base' => $entity_type->getDataTable() ?: $entity_type->getBaseTable(),
@@ -59,12 +59,12 @@ function image_field_views_data_views_data_alter(array &$data, FieldStorageConfi
     'field_name' => $field_name,
     'field table' => $table_mapping->getDedicatedDataTableName($field_storage),
     'field field' => $field_name . '_target_id',
-    'join_extra' => array(
-      0 => array(
+    'join_extra' => [
+      0 => [
         'field' => 'deleted',
         'value' => 0,
         'numeric' => TRUE,
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
diff --git a/core/modules/image/src/Controller/ImageStyleDownloadController.php b/core/modules/image/src/Controller/ImageStyleDownloadController.php
index 8859bdd16a90482ccee07220bbc742367182555e..afc1edf75d1604182dff97595b3f0d209375340e 100644
--- a/core/modules/image/src/Controller/ImageStyleDownloadController.php
+++ b/core/modules/image/src/Controller/ImageStyleDownloadController.php
@@ -108,12 +108,12 @@ public function deliver(Request $request, $scheme, ImageStyleInterface $image_st
     }
 
     $derivative_uri = $image_style->buildUri($image_uri);
-    $headers = array();
+    $headers = [];
 
     // If using the private scheme, let other modules provide headers and
     // control access to the file.
     if ($scheme == 'private') {
-      $headers = $this->moduleHandler()->invokeAll('file_download', array($image_uri));
+      $headers = $this->moduleHandler()->invokeAll('file_download', [$image_uri]);
       if (in_array(-1, $headers) || empty($headers)) {
         throw new AccessDeniedHttpException();
       }
@@ -128,7 +128,7 @@ public function deliver(Request $request, $scheme, ImageStyleInterface $image_st
       $path_info = pathinfo($image_uri);
       $converted_image_uri = $path_info['dirname'] . DIRECTORY_SEPARATOR . $path_info['filename'];
       if (!file_exists($converted_image_uri)) {
-        $this->logger->notice('Source image at %source_image_path not found while trying to generate derivative image at %derivative_path.', array('%source_image_path' => $image_uri, '%derivative_path' => $derivative_uri));
+        $this->logger->notice('Source image at %source_image_path not found while trying to generate derivative image at %derivative_path.', ['%source_image_path' => $image_uri, '%derivative_path' => $derivative_uri]);
         return new Response($this->t('Error generating image, missing source file.'), 404);
       }
       else {
@@ -160,10 +160,10 @@ public function deliver(Request $request, $scheme, ImageStyleInterface $image_st
     if ($success) {
       $image = $this->imageFactory->get($derivative_uri);
       $uri = $image->getSource();
-      $headers += array(
+      $headers += [
         'Content-Type' => $image->getMimeType(),
         'Content-Length' => $image->getFileSize(),
-      );
+      ];
       // \Drupal\Core\EventSubscriber\FinishResponseSubscriber::onRespond()
       // sets response as not cacheable if the Cache-Control header is not
       // already modified. We pass in FALSE for non-private schemes for the
@@ -171,7 +171,7 @@ public function deliver(Request $request, $scheme, ImageStyleInterface $image_st
       return new BinaryFileResponse($uri, 200, $headers, $scheme !== 'private');
     }
     else {
-      $this->logger->notice('Unable to generate the derived image located at %path.', array('%path' => $derivative_uri));
+      $this->logger->notice('Unable to generate the derived image located at %path.', ['%path' => $derivative_uri]);
       return new Response($this->t('Error generating image.'), 500);
     }
   }
diff --git a/core/modules/image/src/Entity/ImageStyle.php b/core/modules/image/src/Entity/ImageStyle.php
index e72258da6885574e823523c4b848c7515353943e..fb096a7fdb295226b7cd06d7fd7517a96d633ccf 100644
--- a/core/modules/image/src/Entity/ImageStyle.php
+++ b/core/modules/image/src/Entity/ImageStyle.php
@@ -73,7 +73,7 @@ class ImageStyle extends ConfigEntityBase implements ImageStyleInterface, Entity
    *
    * @var array
    */
-  protected $effects = array();
+  protected $effects = [];
 
   /**
    * Holds the collection of image effects that are used by this image style.
@@ -200,11 +200,11 @@ public function buildUrl($path, $clean_urls = NULL) {
     // that (if both are set, the security token will neither be emitted in the
     // image derivative URL nor checked for in
     // \Drupal\image\ImageStyleInterface::deliver()).
-    $token_query = array();
+    $token_query = [];
     if (!\Drupal::config('image.settings')->get('suppress_itok_output')) {
       // The passed $path variable can be either a relative path or a full URI.
       $original_uri = file_uri_scheme($path) ? file_stream_wrapper_uri_normalize($path) : file_build_uri($path);
-      $token_query = array(IMAGE_DERIVATIVE_TOKEN => $this->getPathToken($original_uri));
+      $token_query = [IMAGE_DERIVATIVE_TOKEN => $this->getPathToken($original_uri)];
     }
 
     if ($clean_urls === NULL) {
@@ -225,7 +225,7 @@ public function buildUrl($path, $clean_urls = NULL) {
     // built.
     if ($clean_urls === FALSE && file_uri_scheme($uri) == 'public' && !file_exists($uri)) {
       $directory_path = $this->getStreamWrapperManager()->getViaUri($uri)->getDirectoryPath();
-      return Url::fromUri('base:' . $directory_path . '/' . file_uri_target($uri), array('absolute' => TRUE, 'query' => $token_query))->toString();
+      return Url::fromUri('base:' . $directory_path . '/' . file_uri_target($uri), ['absolute' => TRUE, 'query' => $token_query])->toString();
     }
 
     $file_url = file_create_url($uri);
@@ -260,7 +260,7 @@ public function flush($path = NULL) {
 
     // Let other modules update as necessary on flush.
     $module_handler = \Drupal::moduleHandler();
-    $module_handler->invokeAll('image_style_flush', array($this));
+    $module_handler->invokeAll('image_style_flush', [$this]);
 
     // Clear caches so that formatters may be added for this style.
     drupal_theme_rebuild();
@@ -286,7 +286,7 @@ public function createDerivative($original_uri, $derivative_uri) {
 
     // Build the destination folder tree if it doesn't already exist.
     if (!file_prepare_directory($directory, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS)) {
-      \Drupal::logger('image')->error('Failed to create style directory: %directory', array('%directory' => $directory));
+      \Drupal::logger('image')->error('Failed to create style directory: %directory', ['%directory' => $directory]);
       return FALSE;
     }
 
@@ -296,7 +296,7 @@ public function createDerivative($original_uri, $derivative_uri) {
 
     if (!$image->save($derivative_uri)) {
       if (file_exists($derivative_uri)) {
-        \Drupal::logger('image')->error('Cached image file %destination already exists. There may be an issue with your rewrite configuration.', array('%destination' => $derivative_uri));
+        \Drupal::logger('image')->error('Cached image file %destination already exists. There may be an issue with your rewrite configuration.', ['%destination' => $derivative_uri]);
       }
       return FALSE;
     }
@@ -362,7 +362,7 @@ public function getEffects() {
    * {@inheritdoc}
    */
   public function getPluginCollections() {
-    return array('effects' => $this->getEffects());
+    return ['effects' => $this->getEffects()];
   }
 
   /**
diff --git a/core/modules/image/src/Form/ImageEffectAddForm.php b/core/modules/image/src/Form/ImageEffectAddForm.php
index 5bf04b40ff62706122c560d79c93af3265ee6d20..ce304511b1f916ba6e5a10e36843ac1e933046ee 100644
--- a/core/modules/image/src/Form/ImageEffectAddForm.php
+++ b/core/modules/image/src/Form/ImageEffectAddForm.php
@@ -44,7 +44,7 @@ public static function create(ContainerInterface $container) {
   public function buildForm(array $form, FormStateInterface $form_state, ImageStyleInterface $image_style = NULL, $image_effect = NULL) {
     $form = parent::buildForm($form, $form_state, $image_style, $image_effect);
 
-    $form['#title'] = $this->t('Add %label effect', array('%label' => $this->imageEffect->label()));
+    $form['#title'] = $this->t('Add %label effect', ['%label' => $this->imageEffect->label()]);
     $form['actions']['submit']['#value'] = $this->t('Add effect');
 
     return $form;
diff --git a/core/modules/image/src/Form/ImageEffectDeleteForm.php b/core/modules/image/src/Form/ImageEffectDeleteForm.php
index e8c51625bb11c91ddbea83ed4a6053d063374d7a..52cde33c694a0e22c9a6bb549d7a365cff7ee39c 100644
--- a/core/modules/image/src/Form/ImageEffectDeleteForm.php
+++ b/core/modules/image/src/Form/ImageEffectDeleteForm.php
@@ -29,7 +29,7 @@ class ImageEffectDeleteForm extends ConfirmFormBase {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to delete the @effect effect from the %style style?', array('%style' => $this->imageStyle->label(), '@effect' => $this->imageEffect->label()));
+    return $this->t('Are you sure you want to delete the @effect effect from the %style style?', ['%style' => $this->imageStyle->label(), '@effect' => $this->imageEffect->label()]);
   }
 
   /**
@@ -68,7 +68,7 @@ public function buildForm(array $form, FormStateInterface $form_state, ImageStyl
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->imageStyle->deleteImageEffect($this->imageEffect);
-    drupal_set_message($this->t('The image effect %name has been deleted.', array('%name' => $this->imageEffect->label())));
+    drupal_set_message($this->t('The image effect %name has been deleted.', ['%name' => $this->imageEffect->label()]));
     $form_state->setRedirectUrl($this->imageStyle->urlInfo('edit-form'));
   }
 
diff --git a/core/modules/image/src/Form/ImageEffectEditForm.php b/core/modules/image/src/Form/ImageEffectEditForm.php
index 7b54c529af5b9c935b356fa88735a13ffab2f4f9..390e4dc7b35de5d4dc098d94d411af113e4365ac 100644
--- a/core/modules/image/src/Form/ImageEffectEditForm.php
+++ b/core/modules/image/src/Form/ImageEffectEditForm.php
@@ -16,7 +16,7 @@ class ImageEffectEditForm extends ImageEffectFormBase {
   public function buildForm(array $form, FormStateInterface $form_state, ImageStyleInterface $image_style = NULL, $image_effect = NULL) {
     $form = parent::buildForm($form, $form_state, $image_style, $image_effect);
 
-    $form['#title'] = $this->t('Edit %label effect', array('%label' => $this->imageEffect->label()));
+    $form['#title'] = $this->t('Edit %label effect', ['%label' => $this->imageEffect->label()]);
     $form['actions']['submit']['#value'] = $this->t('Update effect');
 
     return $form;
diff --git a/core/modules/image/src/Form/ImageEffectFormBase.php b/core/modules/image/src/Form/ImageEffectFormBase.php
index 9a69e05b3d25b5506f33b250cb7a74b32e6ae183..74368d6082b4e1b4a80dab35ee5e928815997e48 100644
--- a/core/modules/image/src/Form/ImageEffectFormBase.php
+++ b/core/modules/image/src/Form/ImageEffectFormBase.php
@@ -64,14 +64,14 @@ public function buildForm(array $form, FormStateInterface $form_state, ImageStyl
     }
 
     $form['#attached']['library'][] = 'image/admin';
-    $form['uuid'] = array(
+    $form['uuid'] = [
       '#type' => 'value',
       '#value' => $this->imageEffect->getUuid(),
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'value',
       '#value' => $this->imageEffect->getPluginId(),
-    );
+    ];
 
     $form['data'] = [];
     $subform_state = SubformState::createForSubform($form['data'], $form, $form_state);
@@ -79,22 +79,22 @@ public function buildForm(array $form, FormStateInterface $form_state, ImageStyl
     $form['data']['#tree'] = TRUE;
 
     // Check the URL for a weight, then the image effect, otherwise use default.
-    $form['weight'] = array(
+    $form['weight'] = [
       '#type' => 'hidden',
       '#value' => $request->query->has('weight') ? (int) $request->query->get('weight') : $this->imageEffect->getWeight(),
-    );
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#button_type' => 'primary',
-    );
-    $form['actions']['cancel'] = array(
+    ];
+    $form['actions']['cancel'] = [
       '#type' => 'link',
       '#title' => $this->t('Cancel'),
       '#url' => $this->imageStyle->urlInfo('edit-form'),
       '#attributes' => ['class' => ['button']],
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/image/src/Form/ImageStyleAddForm.php b/core/modules/image/src/Form/ImageStyleAddForm.php
index eb6be7dbf8cf4adbe9761c6705d92057037bbf76..41261cac39606f1ee8520ad6dac2e99d48a3570a 100644
--- a/core/modules/image/src/Form/ImageStyleAddForm.php
+++ b/core/modules/image/src/Form/ImageStyleAddForm.php
@@ -14,7 +14,7 @@ class ImageStyleAddForm extends ImageStyleFormBase {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     parent::submitForm($form, $form_state);
-    drupal_set_message($this->t('Style %name was created.', array('%name' => $this->entity->label())));
+    drupal_set_message($this->t('Style %name was created.', ['%name' => $this->entity->label()]));
   }
 
   /**
diff --git a/core/modules/image/src/Form/ImageStyleDeleteForm.php b/core/modules/image/src/Form/ImageStyleDeleteForm.php
index 2d6801beb661d8d55d1a225923f3eb4f7f0615ba..c02c803f6e2b980793c5317a8754d5f68f862cf4 100644
--- a/core/modules/image/src/Form/ImageStyleDeleteForm.php
+++ b/core/modules/image/src/Form/ImageStyleDeleteForm.php
@@ -21,7 +21,7 @@ class ImageStyleDeleteForm extends EntityDeleteForm {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Optionally select a style before deleting %style', array('%style' => $this->entity->label()));
+    return $this->t('Optionally select a style before deleting %style', ['%style' => $this->entity->label()]);
   }
   /**
    * {@inheritdoc}
diff --git a/core/modules/image/src/Form/ImageStyleEditForm.php b/core/modules/image/src/Form/ImageStyleEditForm.php
index ecfcf6f3bbc839928b46e8885ff33e94d80cf232..574d9145a8b954fc4a0fba4b6548103d0dbf6f64 100644
--- a/core/modules/image/src/Form/ImageStyleEditForm.php
+++ b/core/modules/image/src/Form/ImageStyleEditForm.php
@@ -49,54 +49,54 @@ public static function create(ContainerInterface $container) {
    */
   public function form(array $form, FormStateInterface $form_state) {
     $user_input = $form_state->getUserInput();
-    $form['#title'] = $this->t('Edit style %name', array('%name' => $this->entity->label()));
+    $form['#title'] = $this->t('Edit style %name', ['%name' => $this->entity->label()]);
     $form['#tree'] = TRUE;
     $form['#attached']['library'][] = 'image/admin';
 
     // Show the thumbnail preview.
-    $preview_arguments = array('#theme' => 'image_style_preview', '#style' => $this->entity);
-    $form['preview'] = array(
+    $preview_arguments = ['#theme' => 'image_style_preview', '#style' => $this->entity];
+    $form['preview'] = [
       '#type' => 'item',
       '#title' => $this->t('Preview'),
       '#markup' => drupal_render($preview_arguments),
       // Render preview above parent elements.
       '#weight' => -5,
-    );
+    ];
 
     // Build the list of existing image effects for this image style.
-    $form['effects'] = array(
+    $form['effects'] = [
       '#type' => 'table',
-      '#header' => array(
+      '#header' => [
         $this->t('Effect'),
         $this->t('Weight'),
         $this->t('Operations'),
-      ),
-      '#tabledrag' => array(
-        array(
+      ],
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'image-effect-order-weight',
-        ),
-      ),
-      '#attributes' => array(
+        ],
+      ],
+      '#attributes' => [
         'id' => 'image-style-effects',
-      ),
+      ],
       '#empty' => t('There are currently no effects in this style. Add one by selecting an option below.'),
       // Render effects below parent elements.
       '#weight' => 5,
-    );
+    ];
     foreach ($this->entity->getEffects() as $effect) {
       $key = $effect->getUuid();
       $form['effects'][$key]['#attributes']['class'][] = 'draggable';
       $form['effects'][$key]['#weight'] = isset($user_input['effects']) ? $user_input['effects'][$key]['weight'] : NULL;
-      $form['effects'][$key]['effect'] = array(
+      $form['effects'][$key]['effect'] = [
         '#tree' => FALSE,
-        'data' => array(
-          'label' => array(
+        'data' => [
+          'label' => [
             '#plain_text' => $effect->label(),
-          ),
-        ),
-      );
+          ],
+        ],
+      ];
 
       $summary = $effect->getSummary();
 
@@ -105,42 +105,42 @@ public function form(array $form, FormStateInterface $form_state) {
         $form['effects'][$key]['effect']['data']['summary'] = $summary;
       }
 
-      $form['effects'][$key]['weight'] = array(
+      $form['effects'][$key]['weight'] = [
         '#type' => 'weight',
-        '#title' => $this->t('Weight for @title', array('@title' => $effect->label())),
+        '#title' => $this->t('Weight for @title', ['@title' => $effect->label()]),
         '#title_display' => 'invisible',
         '#default_value' => $effect->getWeight(),
-        '#attributes' => array(
-          'class' => array('image-effect-order-weight'),
-        ),
-      );
+        '#attributes' => [
+          'class' => ['image-effect-order-weight'],
+        ],
+      ];
 
-      $links = array();
+      $links = [];
       $is_configurable = $effect instanceof ConfigurableImageEffectInterface;
       if ($is_configurable) {
-        $links['edit'] = array(
+        $links['edit'] = [
           'title' => $this->t('Edit'),
           'url' => Url::fromRoute('image.effect_edit_form', [
             'image_style' => $this->entity->id(),
             'image_effect' => $key,
           ]),
-        );
+        ];
       }
-      $links['delete'] = array(
+      $links['delete'] = [
         'title' => $this->t('Delete'),
         'url' => Url::fromRoute('image.effect_delete', [
           'image_style' => $this->entity->id(),
           'image_effect' => $key,
         ]),
-      );
-      $form['effects'][$key]['operations'] = array(
+      ];
+      $form['effects'][$key]['operations'] = [
         '#type' => 'operations',
         '#links' => $links,
-      );
+      ];
     }
 
     // Build the new image effect addition form and add it to the effect list.
-    $new_effect_options = array();
+    $new_effect_options = [];
     $effects = $this->imageEffectManager->getDefinitions();
     uasort($effects, function ($a, $b) {
       return strcasecmp($a['id'], $b['id']);
@@ -148,43 +148,43 @@ public function form(array $form, FormStateInterface $form_state) {
     foreach ($effects as $effect => $definition) {
       $new_effect_options[$effect] = $definition['label'];
     }
-    $form['effects']['new'] = array(
+    $form['effects']['new'] = [
       '#tree' => FALSE,
       '#weight' => isset($user_input['weight']) ? $user_input['weight'] : NULL,
-      '#attributes' => array('class' => array('draggable')),
-    );
-    $form['effects']['new']['effect'] = array(
-      'data' => array(
-        'new' => array(
+      '#attributes' => ['class' => ['draggable']],
+    ];
+    $form['effects']['new']['effect'] = [
+      'data' => [
+        'new' => [
           '#type' => 'select',
           '#title' => $this->t('Effect'),
           '#title_display' => 'invisible',
           '#options' => $new_effect_options,
           '#empty_option' => $this->t('Select a new effect'),
-        ),
-        array(
-          'add' => array(
+        ],
+        [
+          'add' => [
             '#type' => 'submit',
             '#value' => $this->t('Add'),
-            '#validate' => array('::effectValidate'),
-            '#submit' => array('::submitForm', '::effectSave'),
-          ),
-        ),
-      ),
+            '#validate' => ['::effectValidate'],
+            '#submit' => ['::submitForm', '::effectSave'],
+          ],
+        ],
+      ],
       '#prefix' => '<div class="image-style-new">',
       '#suffix' => '</div>',
-    );
+    ];
 
-    $form['effects']['new']['weight'] = array(
+    $form['effects']['new']['weight'] = [
       '#type' => 'weight',
       '#title' => $this->t('Weight for new effect'),
       '#title_display' => 'invisible',
       '#default_value' => count($this->entity->getEffects()) + 1,
-      '#attributes' => array('class' => array('image-effect-order-weight')),
-    );
-    $form['effects']['new']['operations'] = array(
-      'data' => array(),
-    );
+      '#attributes' => ['class' => ['image-effect-order-weight']],
+    ];
+    $form['effects']['new']['operations'] = [
+      'data' => [],
+    ];
 
     return parent::form($form, $form_state);
   }
@@ -211,20 +211,20 @@ public function effectSave($form, FormStateInterface $form_state) {
     if (is_subclass_of($effect['class'], '\Drupal\image\ConfigurableImageEffectInterface')) {
       $form_state->setRedirect(
         'image.effect_add_form',
-        array(
+        [
           'image_style' => $this->entity->id(),
           'image_effect' => $form_state->getValue('new'),
-        ),
-        array('query' => array('weight' => $form_state->getValue('weight')))
+        ],
+        ['query' => ['weight' => $form_state->getValue('weight')]]
       );
     }
     // If there's no form, immediately add the image effect.
     else {
-      $effect = array(
+      $effect = [
         'id' => $effect['id'],
-        'data' => array(),
+        'data' => [],
         'weight' => $form_state->getValue('weight'),
-      );
+      ];
       $effect_id = $this->entity->addImageEffect($effect);
       $this->entity->save();
       if (!empty($effect_id)) {
diff --git a/core/modules/image/src/Form/ImageStyleFlushForm.php b/core/modules/image/src/Form/ImageStyleFlushForm.php
index 5d4b2dc29a9b0fe62d14b273c0dfd64c5b9dcc44..1326f888f67cb59f994a3d57a263b026216be613 100644
--- a/core/modules/image/src/Form/ImageStyleFlushForm.php
+++ b/core/modules/image/src/Form/ImageStyleFlushForm.php
@@ -14,7 +14,7 @@ class ImageStyleFlushForm extends EntityConfirmFormBase {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to apply the updated %name image effect to all images?', array('%name' => $this->entity->label()));
+    return $this->t('Are you sure you want to apply the updated %name image effect to all images?', ['%name' => $this->entity->label()]);
   }
 
   /**
@@ -43,7 +43,7 @@ public function getCancelUrl() {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->entity->flush();
-    drupal_set_message($this->t('The image style %name has been flushed.', array('%name' => $this->entity->label())));
+    drupal_set_message($this->t('The image style %name has been flushed.', ['%name' => $this->entity->label()]));
     $form_state->setRedirectUrl($this->getCancelUrl());
   }
 
diff --git a/core/modules/image/src/Form/ImageStyleFormBase.php b/core/modules/image/src/Form/ImageStyleFormBase.php
index dfdcca4b953a2568687016e7e4f428663433d7b2..bf3210a1d8ec3584f283a7b2db989b505a323a0d 100644
--- a/core/modules/image/src/Form/ImageStyleFormBase.php
+++ b/core/modules/image/src/Form/ImageStyleFormBase.php
@@ -50,20 +50,20 @@ public static function create(ContainerInterface $container) {
    */
   public function form(array $form, FormStateInterface $form_state) {
 
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Image style name'),
       '#default_value' => $this->entity->label(),
       '#required' => TRUE,
-    );
-    $form['name'] = array(
+    ];
+    $form['name'] = [
       '#type' => 'machine_name',
-      '#machine_name' => array(
-        'exists' => array($this->imageStyleStorage, 'load'),
-      ),
+      '#machine_name' => [
+        'exists' => [$this->imageStyleStorage, 'load'],
+      ],
       '#default_value' => $this->entity->id(),
       '#required' => TRUE,
-    );
+    ];
 
     return parent::form($form, $form_state);
   }
diff --git a/core/modules/image/src/ImageEffectBase.php b/core/modules/image/src/ImageEffectBase.php
index 8e0d9c2812d364d7e74e8c85433cc9f4eefebe63..58be370c1e6e09dfe87094716319824b7567f399 100644
--- a/core/modules/image/src/ImageEffectBase.php
+++ b/core/modules/image/src/ImageEffectBase.php
@@ -85,14 +85,14 @@ public function getDerivativeExtension($extension) {
    * {@inheritdoc}
    */
   public function getSummary() {
-    return array(
+    return [
       '#markup' => '',
-      '#effect' => array(
+      '#effect' => [
         'id' => $this->pluginDefinition['id'],
         'label' => $this->label(),
         'description' => $this->pluginDefinition['description'],
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -128,23 +128,23 @@ public function getWeight() {
    * {@inheritdoc}
    */
   public function getConfiguration() {
-    return array(
+    return [
       'uuid' => $this->getUuid(),
       'id' => $this->getPluginId(),
       'weight' => $this->getWeight(),
       'data' => $this->configuration,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function setConfiguration(array $configuration) {
-    $configuration += array(
-      'data' => array(),
+    $configuration += [
+      'data' => [],
       'uuid' => '',
       'weight' => '',
-    );
+    ];
     $this->configuration = $configuration['data'] + $this->defaultConfiguration();
     $this->uuid = $configuration['uuid'];
     $this->weight = $configuration['weight'];
@@ -155,14 +155,14 @@ public function setConfiguration(array $configuration) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/image/src/ImageStyleListBuilder.php b/core/modules/image/src/ImageStyleListBuilder.php
index 140ed46b8cbd6056b00bbe7e8b9f77d3ba189a84..62651cd2f82a1b7b1f3d84dbab17ef2ea8d0c330 100644
--- a/core/modules/image/src/ImageStyleListBuilder.php
+++ b/core/modules/image/src/ImageStyleListBuilder.php
@@ -33,15 +33,15 @@ public function buildRow(EntityInterface $entity) {
    * {@inheritdoc}
    */
   public function getDefaultOperations(EntityInterface $entity) {
-    $flush = array(
+    $flush = [
       'title' => t('Flush'),
       'weight' => 200,
       'url' => $entity->urlInfo('flush-form'),
-    );
+    ];
 
-    return parent::getDefaultOperations($entity) + array(
+    return parent::getDefaultOperations($entity) + [
       'flush' => $flush,
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php b/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php
index b24c6972685ac47c5bb6bb35e616d7e586bbc8a8..a00d9e27f0c11af46aa9493a051c6584e413082e 100644
--- a/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php
+++ b/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php
@@ -93,10 +93,10 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'image_style' => '',
       'image_link' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -118,17 +118,17 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
         '#access' => $this->currentUser->hasPermission('administer image styles')
       ],
     ];
-    $link_types = array(
+    $link_types = [
       'content' => t('Content'),
       'file' => t('File'),
-    );
-    $element['image_link'] = array(
+    ];
+    $element['image_link'] = [
       '#title' => t('Link image to'),
       '#type' => 'select',
       '#default_value' => $this->getSetting('image_link'),
       '#empty_option' => t('Nothing'),
       '#options' => $link_types,
-    );
+    ];
 
     return $element;
   }
@@ -137,7 +137,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $image_styles = image_style_options(FALSE);
     // Unset possible 'No defined styles' option.
@@ -146,16 +146,16 @@ public function settingsSummary() {
     // their styles in code.
     $image_style_setting = $this->getSetting('image_style');
     if (isset($image_styles[$image_style_setting])) {
-      $summary[] = t('Image style: @style', array('@style' => $image_styles[$image_style_setting]));
+      $summary[] = t('Image style: @style', ['@style' => $image_styles[$image_style_setting]]);
     }
     else {
       $summary[] = t('Original image');
     }
 
-    $link_types = array(
+    $link_types = [
       'content' => t('Linked to content'),
       'file' => t('Linked to file'),
-    );
+    ];
     // Display this setting only if image is linked.
     $image_link_setting = $this->getSetting('image_link');
     if (isset($link_types[$image_link_setting])) {
@@ -169,7 +169,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
     $files = $this->getEntitiesToView($items, $langcode);
 
     // Early opt-out if the field is empty.
@@ -219,17 +219,17 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
       $item_attributes = $item->_attributes;
       unset($item->_attributes);
 
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#theme' => 'image_formatter',
         '#item' => $item,
         '#item_attributes' => $item_attributes,
         '#image_style' => $image_style_setting,
         '#url' => $url,
-        '#cache' => array(
+        '#cache' => [
           'tags' => $cache_tags,
           'contexts' => $cache_contexts,
-        ),
-      );
+        ],
+      ];
     }
 
     return $elements;
diff --git a/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatterBase.php b/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatterBase.php
index 19b89b13db0a1182224b9c688e8f5352f7dcf331..335868ab6f66d0593a47a3d45a638bd8d9e61950 100644
--- a/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatterBase.php
+++ b/core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatterBase.php
@@ -28,7 +28,7 @@ protected function getEntitiesToView(EntityReferenceFieldItemListInterface $item
         // so that the fallback image can be rendered without affecting the
         // field values in the entity being rendered.
         $items = clone $items;
-        $items->setValue(array(
+        $items->setValue([
           'target_id' => $file->id(),
           'alt' => $default_image['alt'],
           'title' => $default_image['title'],
@@ -37,7 +37,7 @@ protected function getEntitiesToView(EntityReferenceFieldItemListInterface $item
           'entity' => $file,
           '_loaded' => TRUE,
           '_is_default' => TRUE,
-        ));
+        ]);
         $file->_referringItem = $items[0];
       }
     }
diff --git a/core/modules/image/src/Plugin/Field/FieldType/ImageItem.php b/core/modules/image/src/Plugin/Field/FieldType/ImageItem.php
index d9011a850f2687735b362d425907efbf4128ae83..7b8b27521650e6f2db3231d1a8ec7a74ce495d3e 100644
--- a/core/modules/image/src/Plugin/Field/FieldType/ImageItem.php
+++ b/core/modules/image/src/Plugin/Field/FieldType/ImageItem.php
@@ -55,22 +55,22 @@ class ImageItem extends FileItem {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
-      'default_image' => array(
+    return [
+      'default_image' => [
         'uuid' => NULL,
         'alt' => '',
         'title' => '',
         'width' => NULL,
         'height' => NULL,
-      ),
-    ) + parent::defaultStorageSettings();
+      ],
+    ] + parent::defaultStorageSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    $settings = array(
+    $settings = [
       'file_extensions' => 'png gif jpg jpeg',
       'alt_field' => 1,
       'alt_field_required' => 1,
@@ -78,14 +78,14 @@ public static function defaultFieldSettings() {
       'title_field_required' => 0,
       'max_resolution' => '',
       'min_resolution' => '',
-      'default_image' => array(
+      'default_image' => [
         'uuid' => NULL,
         'alt' => '',
         'title' => '',
         'width' => NULL,
         'height' => NULL,
-      ),
-    ) + parent::defaultFieldSettings();
+      ],
+    ] + parent::defaultFieldSettings();
 
     unset($settings['description_field']);
     return $settings;
@@ -95,44 +95,44 @@ public static function defaultFieldSettings() {
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'target_id' => array(
+    return [
+      'columns' => [
+        'target_id' => [
           'description' => 'The ID of the file entity.',
           'type' => 'int',
           'unsigned' => TRUE,
-        ),
-        'alt' => array(
+        ],
+        'alt' => [
           'description' => "Alternative image text, for the image's 'alt' attribute.",
           'type' => 'varchar',
           'length' => 512,
-        ),
-        'title' => array(
+        ],
+        'title' => [
           'description' => "Image title text, for the image's 'title' attribute.",
           'type' => 'varchar',
           'length' => 1024,
-        ),
-        'width' => array(
+        ],
+        'width' => [
           'description' => 'The width of the image in pixels.',
           'type' => 'int',
           'unsigned' => TRUE,
-        ),
-        'height' => array(
+        ],
+        'height' => [
           'description' => 'The height of the image in pixels.',
           'type' => 'int',
           'unsigned' => TRUE,
-        ),
-      ),
-      'indexes' => array(
-        'target_id' => array('target_id'),
-      ),
-      'foreign keys' => array(
-        'target_id' => array(
+        ],
+      ],
+      'indexes' => [
+        'target_id' => ['target_id'],
+      ],
+      'foreign keys' => [
+        'target_id' => [
           'table' => 'file_managed',
-          'columns' => array('target_id' => 'fid'),
-        ),
-      ),
-    );
+          'columns' => ['target_id' => 'fid'],
+        ],
+      ],
+    ];
   }
 
   /**
@@ -167,7 +167,7 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $element = array();
+    $element = [];
 
     // We need the field-level 'default_image' setting, and $this->getSettings()
     // will only provide the instance-level one, so we need to explicitly fetch
@@ -175,13 +175,13 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
     $settings = $this->getFieldDefinition()->getFieldStorageDefinition()->getSettings();
 
     $scheme_options = \Drupal::service('stream_wrapper_manager')->getNames(StreamWrapperInterface::WRITE_VISIBLE);
-    $element['uri_scheme'] = array(
+    $element['uri_scheme'] = [
       '#type' => 'radios',
       '#title' => t('Upload destination'),
       '#options' => $scheme_options,
       '#default_value' => $settings['uri_scheme'],
       '#description' => t('Select where the final files should be stored. Private file storage has significantly more overhead than public files, but allows restricted access to files within this field.'),
-    );
+    ];
 
     // Add default_image element.
     static::defaultImageForm($element, $settings);
@@ -200,101 +200,101 @@ public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
     $settings = $this->getSettings();
 
     // Add maximum and minimum resolution settings.
-    $max_resolution = explode('x', $settings['max_resolution']) + array('', '');
-    $element['max_resolution'] = array(
+    $max_resolution = explode('x', $settings['max_resolution']) + ['', ''];
+    $element['max_resolution'] = [
       '#type' => 'item',
       '#title' => t('Maximum image resolution'),
-      '#element_validate' => array(array(get_class($this), 'validateResolution')),
+      '#element_validate' => [[get_class($this), 'validateResolution']],
       '#weight' => 4.1,
       '#field_prefix' => '<div class="container-inline">',
       '#field_suffix' => '</div>',
       '#description' => t('The maximum allowed image size expressed as WIDTH×HEIGHT (e.g. 640×480). Leave blank for no restriction. If a larger image is uploaded, it will be resized to reflect the given width and height. Resizing images on upload will cause the loss of <a href="http://wikipedia.org/wiki/Exchangeable_image_file_format">EXIF data</a> in the image.'),
-    );
-    $element['max_resolution']['x'] = array(
+    ];
+    $element['max_resolution']['x'] = [
       '#type' => 'number',
       '#title' => t('Maximum width'),
       '#title_display' => 'invisible',
       '#default_value' => $max_resolution[0],
       '#min' => 1,
       '#field_suffix' => ' × ',
-    );
-    $element['max_resolution']['y'] = array(
+    ];
+    $element['max_resolution']['y'] = [
       '#type' => 'number',
       '#title' => t('Maximum height'),
       '#title_display' => 'invisible',
       '#default_value' => $max_resolution[1],
       '#min' => 1,
       '#field_suffix' => ' ' . t('pixels'),
-    );
+    ];
 
-    $min_resolution = explode('x', $settings['min_resolution']) + array('', '');
-    $element['min_resolution'] = array(
+    $min_resolution = explode('x', $settings['min_resolution']) + ['', ''];
+    $element['min_resolution'] = [
       '#type' => 'item',
       '#title' => t('Minimum image resolution'),
-      '#element_validate' => array(array(get_class($this), 'validateResolution')),
+      '#element_validate' => [[get_class($this), 'validateResolution']],
       '#weight' => 4.2,
       '#field_prefix' => '<div class="container-inline">',
       '#field_suffix' => '</div>',
       '#description' => t('The minimum allowed image size expressed as WIDTH×HEIGHT (e.g. 640×480). Leave blank for no restriction. If a smaller image is uploaded, it will be rejected.'),
-    );
-    $element['min_resolution']['x'] = array(
+    ];
+    $element['min_resolution']['x'] = [
       '#type' => 'number',
       '#title' => t('Minimum width'),
       '#title_display' => 'invisible',
       '#default_value' => $min_resolution[0],
       '#min' => 1,
       '#field_suffix' => ' × ',
-    );
-    $element['min_resolution']['y'] = array(
+    ];
+    $element['min_resolution']['y'] = [
       '#type' => 'number',
       '#title' => t('Minimum height'),
       '#title_display' => 'invisible',
       '#default_value' => $min_resolution[1],
       '#min' => 1,
       '#field_suffix' => ' ' . t('pixels'),
-    );
+    ];
 
     // Remove the description option.
     unset($element['description_field']);
 
     // Add title and alt configuration options.
-    $element['alt_field'] = array(
+    $element['alt_field'] = [
       '#type' => 'checkbox',
       '#title' => t('Enable <em>Alt</em> field'),
       '#default_value' => $settings['alt_field'],
       '#description' => t('The alt attribute may be used by search engines, screen readers, and when the image cannot be loaded. Enabling this field is recommended.'),
       '#weight' => 9,
-    );
-    $element['alt_field_required'] = array(
+    ];
+    $element['alt_field_required'] = [
       '#type' => 'checkbox',
       '#title' => t('<em>Alt</em> field required'),
       '#default_value' => $settings['alt_field_required'],
       '#description' => t('Making this field required is recommended.'),
       '#weight' => 10,
-      '#states' => array(
-        'visible' => array(
-          ':input[name="settings[alt_field]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-    $element['title_field'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="settings[alt_field]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+    $element['title_field'] = [
       '#type' => 'checkbox',
       '#title' => t('Enable <em>Title</em> field'),
       '#default_value' => $settings['title_field'],
       '#description' => t('The title attribute is used as a tooltip when the mouse hovers over the image. Enabling this field is not recommended as it can cause problems with screen readers.'),
       '#weight' => 11,
-    );
-    $element['title_field_required'] = array(
+    ];
+    $element['title_field_required'] = [
       '#type' => 'checkbox',
       '#title' => t('<em>Title</em> field required'),
       '#default_value' => $settings['title_field_required'],
       '#weight' => 12,
-      '#states' => array(
-        'visible' => array(
-          ':input[name="settings[title_field]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="settings[title_field]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
 
     // Add default_image element.
     static::defaultImageForm($element, $settings);
@@ -328,11 +328,11 @@ public function preSave() {
   public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
     $random = new Random();
     $settings = $field_definition->getSettings();
-    static $images = array();
+    static $images = [];
 
     $min_resolution = empty($settings['min_resolution']) ? '100x100' : $settings['min_resolution'];
     $max_resolution = empty($settings['max_resolution']) ? '600x600' : $settings['max_resolution'];
-    $extensions = array_intersect(explode(' ', $settings['file_extensions']), array('png', 'gif', 'jpg', 'jpeg'));
+    $extensions = array_intersect(explode(' ', $settings['file_extensions']), ['png', 'gif', 'jpg', 'jpeg']);
     $extension = array_rand(array_combine($extensions, $extensions));
     // Generate a max of 5 different images.
     if (!isset($images[$extension][$min_resolution][$max_resolution]) || count($images[$extension][$min_resolution][$max_resolution]) <= 5) {
@@ -352,7 +352,7 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
         $images[$extension][$min_resolution][$max_resolution][$file->id()] = $file;
       }
       else {
-        return array();
+        return [];
       }
     }
     else {
@@ -362,13 +362,13 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
     }
 
     list($width, $height) = getimagesize($file->getFileUri());
-    $values = array(
+    $values = [
       'target_id' => $file->id(),
       'alt' => $random->sentences(4),
       'title' => $random->sentences(4),
       'width' => $width,
       'height' => $height,
-    );
+    ];
     return $values;
   }
 
@@ -377,11 +377,11 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
    */
   public static function validateResolution($element, FormStateInterface $form_state) {
     if (!empty($element['x']['#value']) || !empty($element['y']['#value'])) {
-      foreach (array('x', 'y') as $dimension) {
+      foreach (['x', 'y'] as $dimension) {
         if (!$element[$dimension]['#value']) {
           // We expect the field name placeholder value to be wrapped in t()
           // here, so it won't be escaped again as it's already marked safe.
-          $form_state->setError($element[$dimension], t('Both a height and width value must be specified in the @name field.', array('@name' => $element['#title'])));
+          $form_state->setError($element[$dimension], t('Both a height and width value must be specified in the @name field.', ['@name' => $element['#title']]));
           return;
         }
       }
@@ -401,51 +401,51 @@ public static function validateResolution($element, FormStateInterface $form_sta
    *   The field settings array.
    */
   protected function defaultImageForm(array &$element, array $settings) {
-    $element['default_image'] = array(
+    $element['default_image'] = [
       '#type' => 'details',
       '#title' => t('Default image'),
       '#open' => TRUE,
-    );
+    ];
     // Convert the stored UUID to a FID.
     $fids = [];
     $uuid = $settings['default_image']['uuid'];
     if ($uuid && ($file = $this->getEntityManager()->loadEntityByUuid('file', $uuid))) {
       $fids[0] = $file->id();
     }
-    $element['default_image']['uuid'] = array(
+    $element['default_image']['uuid'] = [
       '#type' => 'managed_file',
       '#title' => t('Image'),
       '#description' => t('Image to be shown if no image is uploaded.'),
       '#default_value' => $fids,
       '#upload_location' => $settings['uri_scheme'] . '://default_images/',
-      '#element_validate' => array(
+      '#element_validate' => [
         '\Drupal\file\Element\ManagedFile::validateManagedFile',
-        array(get_class($this), 'validateDefaultImageForm'),
-      ),
+        [get_class($this), 'validateDefaultImageForm'],
+      ],
       '#upload_validators' => $this->getUploadValidators(),
-    );
-    $element['default_image']['alt'] = array(
+    ];
+    $element['default_image']['alt'] = [
       '#type' => 'textfield',
       '#title' => t('Alternative text'),
       '#description' => t('This text will be used by screen readers, search engines, and when the image cannot be loaded.'),
       '#default_value' => $settings['default_image']['alt'],
       '#maxlength' => 512,
-    );
-    $element['default_image']['title'] = array(
+    ];
+    $element['default_image']['title'] = [
       '#type' => 'textfield',
       '#title' => t('Title'),
       '#description' => t('The title attribute is used as a tooltip when the mouse hovers over the image.'),
       '#default_value' => $settings['default_image']['title'],
       '#maxlength' => 1024,
-    );
-    $element['default_image']['width'] = array(
+    ];
+    $element['default_image']['width'] = [
       '#type' => 'value',
       '#value' => $settings['default_image']['width'],
-    );
-    $element['default_image']['height'] = array(
+    ];
+    $element['default_image']['height'] = [
       '#type' => 'value',
       '#value' => $settings['default_image']['height'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php b/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
index f881419c0ed2d67408f615d55be5439d37e15aa1..735cfceebc4405856721ad683ddeaacd39d45c4f 100644
--- a/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
+++ b/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
@@ -26,10 +26,10 @@ class ImageWidget extends FileWidget {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'progress_indicator' => 'throbber',
       'preview_image_style' => 'thumbnail',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -38,7 +38,7 @@ public static function defaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $element = parent::settingsForm($form, $form_state);
 
-    $element['preview_image_style'] = array(
+    $element['preview_image_style'] = [
       '#title' => t('Preview image style'),
       '#type' => 'select',
       '#options' => image_style_options(FALSE),
@@ -46,7 +46,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
       '#default_value' => $this->getSetting('preview_image_style'),
       '#description' => t('The preview image will be shown while editing the content.'),
       '#weight' => 15,
-    );
+    ];
 
     return $element;
   }
@@ -64,7 +64,7 @@ public function settingsSummary() {
     // their styles in code.
     $image_style_setting = $this->getSetting('preview_image_style');
     if (isset($image_styles[$image_style_setting])) {
-      $preview_image_style = t('Preview image style: @style', array('@style' => $image_styles[$image_style_setting]));
+      $preview_image_style = t('Preview image style: @style', ['@style' => $image_styles[$image_style_setting]]);
     }
     else {
       $preview_image_style = t('No preview');
@@ -84,12 +84,12 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
     $elements = parent::formMultipleElements($items, $form, $form_state);
 
     $cardinality = $this->fieldDefinition->getFieldStorageDefinition()->getCardinality();
-    $file_upload_help = array(
+    $file_upload_help = [
       '#theme' => 'file_upload_help',
       '#description' => '',
       '#upload_validators' => $elements[0]['#upload_validators'],
       '#cardinality' => $cardinality,
-    );
+    ];
     if ($cardinality == 1) {
       // If there's only one field, return it as delta 0.
       if (empty($elements[0]['#default_value']['fids'])) {
@@ -114,11 +114,11 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
 
     // Add upload resolution validation.
     if ($field_settings['max_resolution'] || $field_settings['min_resolution']) {
-      $element['#upload_validators']['file_validate_image_resolution'] = array($field_settings['max_resolution'], $field_settings['min_resolution']);
+      $element['#upload_validators']['file_validate_image_resolution'] = [$field_settings['max_resolution'], $field_settings['min_resolution']];
     }
 
     // If not using custom extension validation, ensure this is an image.
-    $supported_extensions = array('png', 'gif', 'jpg', 'jpeg');
+    $supported_extensions = ['png', 'gif', 'jpg', 'jpeg'];
     $extensions = isset($element['#upload_validators']['file_validate_extensions'][0]) ? $element['#upload_validators']['file_validate_extensions'][0] : implode(' ', $supported_extensions);
     $extensions = array_intersect(explode(' ', $extensions), $supported_extensions);
     $element['#upload_validators']['file_validate_extensions'][0] = implode(' ', $extensions);
@@ -142,7 +142,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     if (!empty($default_image['uuid']) && $entity = \Drupal::entityManager()->loadEntityByUuid('file', $default_image['uuid'])) {
       $default_image['fid'] = $entity->id();
     }
-    $element['#default_image'] = !empty($default_image['fid']) ? $default_image : array();
+    $element['#default_image'] = !empty($default_image['fid']) ? $default_image : [];
 
     return $element;
   }
@@ -163,10 +163,10 @@ public static function process($element, FormStateInterface $form_state, $form)
     // Add the image preview.
     if (!empty($element['#files']) && $element['#preview_image_style']) {
       $file = reset($element['#files']);
-      $variables = array(
+      $variables = [
         'style_name' => $element['#preview_image_style'],
         'uri' => $file->getFileUri(),
-      );
+      ];
 
       // Determine image dimensions.
       if (isset($element['#value']['width']) && isset($element['#value']['height'])) {
@@ -184,43 +184,43 @@ public static function process($element, FormStateInterface $form_state, $form)
         }
       }
 
-      $element['preview'] = array(
+      $element['preview'] = [
         '#weight' => -10,
         '#theme' => 'image_style',
         '#width' => $variables['width'],
         '#height' => $variables['height'],
         '#style_name' => $variables['style_name'],
         '#uri' => $variables['uri'],
-      );
+      ];
 
       // Store the dimensions in the form so the file doesn't have to be
       // accessed again. This is important for remote files.
-      $element['width'] = array(
+      $element['width'] = [
         '#type' => 'hidden',
         '#value' => $variables['width'],
-      );
-      $element['height'] = array(
+      ];
+      $element['height'] = [
         '#type' => 'hidden',
         '#value' => $variables['height'],
-      );
+      ];
     }
     elseif (!empty($element['#default_image'])) {
       $default_image = $element['#default_image'];
       $file = File::load($default_image['fid']);
       if (!empty($file)) {
-        $element['preview'] = array(
+        $element['preview'] = [
           '#weight' => -10,
           '#theme' => 'image_style',
           '#width' => $default_image['width'],
           '#height' => $default_image['height'],
           '#style_name' => $element['#preview_image_style'],
           '#uri' => $file->getFileUri(),
-        );
+        ];
       }
     }
 
     // Add the additional alt and title fields.
-    $element['alt'] = array(
+    $element['alt'] = [
       '#title' => t('Alternative text'),
       '#type' => 'textfield',
       '#default_value' => isset($item['alt']) ? $item['alt'] : '',
@@ -230,9 +230,9 @@ public static function process($element, FormStateInterface $form_state, $form)
       '#weight' => -12,
       '#access' => (bool) $item['fids'] && $element['#alt_field'],
       '#required' => $element['#alt_field_required'],
-      '#element_validate' => $element['#alt_field_required'] == 1 ? array(array(get_called_class(), 'validateRequiredFields')) : array(),
-    );
-    $element['title'] = array(
+      '#element_validate' => $element['#alt_field_required'] == 1 ? [[get_called_class(), 'validateRequiredFields']] : [],
+    ];
+    $element['title'] = [
       '#type' => 'textfield',
       '#title' => t('Title'),
       '#default_value' => isset($item['title']) ? $item['title'] : '',
@@ -241,8 +241,8 @@ public static function process($element, FormStateInterface $form_state, $form)
       '#weight' => -11,
       '#access' => (bool) $item['fids'] && $element['#title_field'],
       '#required' => $element['#title_field_required'],
-      '#element_validate' => $element['#title_field_required'] == 1 ? array(array(get_called_class(), 'validateRequiredFields')) : array(),
-    );
+      '#element_validate' => $element['#title_field_required'] == 1 ? [[get_called_class(), 'validateRequiredFields']] : [],
+    ];
 
     return parent::process($element, $form_state, $form);
   }
diff --git a/core/modules/image/src/Plugin/ImageEffect/ConvertImageEffect.php b/core/modules/image/src/Plugin/ImageEffect/ConvertImageEffect.php
index a462b6705eaedc0ec80a190d948440fadc403060..28d51792c81fa35a75d2cdcedeaa22f03013cfae 100644
--- a/core/modules/image/src/Plugin/ImageEffect/ConvertImageEffect.php
+++ b/core/modules/image/src/Plugin/ImageEffect/ConvertImageEffect.php
@@ -23,7 +23,7 @@ class ConvertImageEffect extends ConfigurableImageEffectBase {
    */
   public function applyEffect(ImageInterface $image) {
     if (!$image->convert($this->configuration['extension'])) {
-      $this->logger->error('Image convert failed using the %toolkit toolkit on %path (%mimetype)', array('%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType()));
+      $this->logger->error('Image convert failed using the %toolkit toolkit on %path (%mimetype)', ['%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType()]);
       return FALSE;
     }
     return TRUE;
@@ -40,9 +40,9 @@ public function getDerivativeExtension($extension) {
    * {@inheritdoc}
    */
   public function getSummary() {
-    $summary = array(
+    $summary = [
       '#markup' => Unicode::strtoupper($this->configuration['extension']),
-    );
+    ];
     $summary += parent::getSummary();
 
     return $summary;
@@ -52,9 +52,9 @@ public function getSummary() {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'extension' => NULL,
-    );
+    ];
   }
 
   /**
@@ -64,15 +64,15 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $extensions = \Drupal::service('image.toolkit.manager')->getDefaultToolkit()->getSupportedExtensions();
     $options = array_combine(
       $extensions,
-      array_map(array('\Drupal\Component\Utility\Unicode', 'strtoupper'), $extensions)
+      array_map(['\Drupal\Component\Utility\Unicode', 'strtoupper'], $extensions)
     );
-    $form['extension'] = array(
+    $form['extension'] = [
       '#type' => 'select',
       '#title' => t('Extension'),
       '#default_value' => $this->configuration['extension'],
       '#required' => TRUE,
       '#options' => $options,
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/image/src/Plugin/ImageEffect/CropImageEffect.php b/core/modules/image/src/Plugin/ImageEffect/CropImageEffect.php
index 3f15a0e8479c62c6137a37985ee1d28922d90ba2..87536e643d35feb660f24a87159d2f479b96a91f 100644
--- a/core/modules/image/src/Plugin/ImageEffect/CropImageEffect.php
+++ b/core/modules/image/src/Plugin/ImageEffect/CropImageEffect.php
@@ -24,7 +24,7 @@ public function applyEffect(ImageInterface $image) {
     $x = image_filter_keyword($x, $image->getWidth(), $this->configuration['width']);
     $y = image_filter_keyword($y, $image->getHeight(), $this->configuration['height']);
     if (!$image->crop($x, $y, $this->configuration['width'], $this->configuration['height'])) {
-      $this->logger->error('Image crop failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array('%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()));
+      $this->logger->error('Image crop failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', ['%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()]);
       return FALSE;
     }
     return TRUE;
@@ -34,10 +34,10 @@ public function applyEffect(ImageInterface $image) {
    * {@inheritdoc}
    */
   public function getSummary() {
-    $summary = array(
+    $summary = [
       '#theme' => 'image_crop_summary',
       '#data' => $this->configuration,
-    );
+    ];
     $summary += parent::getSummary();
 
     return $summary;
@@ -47,9 +47,9 @@ public function getSummary() {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return parent::defaultConfiguration() + array(
+    return parent::defaultConfiguration() + [
       'anchor' => 'center-center',
-    );
+    ];
   }
 
   /**
@@ -57,10 +57,10 @@ public function defaultConfiguration() {
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     $form = parent::buildConfigurationForm($form, $form_state);
-    $form['anchor'] = array(
+    $form['anchor'] = [
       '#type' => 'radios',
       '#title' => t('Anchor'),
-      '#options' => array(
+      '#options' => [
         'left-top' => t('Top left'),
         'center-top' => t('Top center'),
         'right-top' => t('Top right'),
@@ -70,11 +70,11 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
         'left-bottom' => t('Bottom left'),
         'center-bottom' => t('Bottom center'),
         'right-bottom' => t('Bottom right'),
-      ),
+      ],
       '#theme' => 'image_anchor',
       '#default_value' => $this->configuration['anchor'],
       '#description' => t('The part of the image that will be retained during the crop.'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/image/src/Plugin/ImageEffect/DesaturateImageEffect.php b/core/modules/image/src/Plugin/ImageEffect/DesaturateImageEffect.php
index 26afce3695bbcdc2f01ad60a929aeb4558896e0b..d34161ecc59f9311fe4eab81d6862bdbb2660347 100644
--- a/core/modules/image/src/Plugin/ImageEffect/DesaturateImageEffect.php
+++ b/core/modules/image/src/Plugin/ImageEffect/DesaturateImageEffect.php
@@ -21,7 +21,7 @@ class DesaturateImageEffect extends ImageEffectBase {
    */
   public function applyEffect(ImageInterface $image) {
     if (!$image->desaturate()) {
-      $this->logger->error('Image desaturate failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array('%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()));
+      $this->logger->error('Image desaturate failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', ['%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()]);
       return FALSE;
     }
     return TRUE;
diff --git a/core/modules/image/src/Plugin/ImageEffect/ResizeImageEffect.php b/core/modules/image/src/Plugin/ImageEffect/ResizeImageEffect.php
index 04a59d6bee71267e5596c9aa99cf0d81a20f099b..dba34298def9522a3f4fc17cb423baed8cdfe19f 100644
--- a/core/modules/image/src/Plugin/ImageEffect/ResizeImageEffect.php
+++ b/core/modules/image/src/Plugin/ImageEffect/ResizeImageEffect.php
@@ -22,7 +22,7 @@ class ResizeImageEffect extends ConfigurableImageEffectBase {
    */
   public function applyEffect(ImageInterface $image) {
     if (!$image->resize($this->configuration['width'], $this->configuration['height'])) {
-      $this->logger->error('Image resize failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array('%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()));
+      $this->logger->error('Image resize failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', ['%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()]);
       return FALSE;
     }
     return TRUE;
@@ -41,10 +41,10 @@ public function transformDimensions(array &$dimensions, $uri) {
    * {@inheritdoc}
    */
   public function getSummary() {
-    $summary = array(
+    $summary = [
       '#theme' => 'image_resize_summary',
       '#data' => $this->configuration,
-    );
+    ];
     $summary += parent::getSummary();
 
     return $summary;
@@ -54,32 +54,32 @@ public function getSummary() {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'width' => NULL,
       'height' => NULL,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['width'] = array(
+    $form['width'] = [
       '#type' => 'number',
       '#title' => t('Width'),
       '#default_value' => $this->configuration['width'],
       '#field_suffix' => ' ' . t('pixels'),
       '#required' => TRUE,
       '#min' => 1,
-    );
-    $form['height'] = array(
+    ];
+    $form['height'] = [
       '#type' => 'number',
       '#title' => t('Height'),
       '#default_value' => $this->configuration['height'],
       '#field_suffix' => ' ' . t('pixels'),
       '#required' => TRUE,
       '#min' => 1,
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/image/src/Plugin/ImageEffect/RotateImageEffect.php b/core/modules/image/src/Plugin/ImageEffect/RotateImageEffect.php
index df2da77c9a1b25981e518bfb449c0b7d43b14c6e..7e394a3cce67a694baaff56775657ec04e96b7b3 100644
--- a/core/modules/image/src/Plugin/ImageEffect/RotateImageEffect.php
+++ b/core/modules/image/src/Plugin/ImageEffect/RotateImageEffect.php
@@ -29,7 +29,7 @@ public function applyEffect(ImageInterface $image) {
     }
 
     if (!$image->rotate($this->configuration['degrees'], $this->configuration['bgcolor'])) {
-      $this->logger->error('Image rotate failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array('%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()));
+      $this->logger->error('Image rotate failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', ['%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()]);
       return FALSE;
     }
     return TRUE;
@@ -56,10 +56,10 @@ public function transformDimensions(array &$dimensions, $uri) {
    * {@inheritdoc}
    */
   public function getSummary() {
-    $summary = array(
+    $summary = [
       '#theme' => 'image_rotate_summary',
       '#data' => $this->configuration,
-    );
+    ];
     $summary += parent::getSummary();
 
     return $summary;
@@ -69,39 +69,39 @@ public function getSummary() {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'degrees' => 0,
       'bgcolor' => NULL,
       'random' => FALSE,
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['degrees'] = array(
+    $form['degrees'] = [
       '#type' => 'number',
       '#default_value' => $this->configuration['degrees'],
       '#title' => t('Rotation angle'),
       '#description' => t('The number of degrees the image should be rotated. Positive numbers are clockwise, negative are counter-clockwise.'),
       '#field_suffix' => '°',
       '#required' => TRUE,
-    );
-    $form['bgcolor'] = array(
+    ];
+    $form['bgcolor'] = [
       '#type' => 'textfield',
       '#default_value' => $this->configuration['bgcolor'],
       '#title' => t('Background color'),
       '#description' => t('The background color to use for exposed areas of the image. Use web-style hex colors (#FFFFFF for white, #000000 for black). Leave blank for transparency on image types that support it.'),
       '#size' => 7,
       '#maxlength' => 7,
-    );
-    $form['random'] = array(
+    ];
+    $form['random'] = [
       '#type' => 'checkbox',
       '#default_value' => $this->configuration['random'],
       '#title' => t('Randomize'),
       '#description' => t('Randomize the rotation angle for each image. The angle specified above is used as a maximum.'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/image/src/Plugin/ImageEffect/ScaleAndCropImageEffect.php b/core/modules/image/src/Plugin/ImageEffect/ScaleAndCropImageEffect.php
index f2ab32329d5e913e5e279abcee2162b75707ad04..57ea0b2c8cb76378a0a09f236166e840cc2c6853 100644
--- a/core/modules/image/src/Plugin/ImageEffect/ScaleAndCropImageEffect.php
+++ b/core/modules/image/src/Plugin/ImageEffect/ScaleAndCropImageEffect.php
@@ -20,7 +20,7 @@ class ScaleAndCropImageEffect extends ResizeImageEffect {
    */
   public function applyEffect(ImageInterface $image) {
     if (!$image->scaleAndCrop($this->configuration['width'], $this->configuration['height'])) {
-      $this->logger->error('Image scale and crop failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array('%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()));
+      $this->logger->error('Image scale and crop failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', ['%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()]);
       return FALSE;
     }
     return TRUE;
diff --git a/core/modules/image/src/Plugin/ImageEffect/ScaleImageEffect.php b/core/modules/image/src/Plugin/ImageEffect/ScaleImageEffect.php
index a035df687003b9f62fed769fe6869494011c12e8..bfb6d942fb9a4389024a2a424cfc624c6236c536 100644
--- a/core/modules/image/src/Plugin/ImageEffect/ScaleImageEffect.php
+++ b/core/modules/image/src/Plugin/ImageEffect/ScaleImageEffect.php
@@ -22,7 +22,7 @@ class ScaleImageEffect extends ResizeImageEffect {
    */
   public function applyEffect(ImageInterface $image) {
     if (!$image->scale($this->configuration['width'], $this->configuration['height'], $this->configuration['upscale'])) {
-      $this->logger->error('Image scale failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array('%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()));
+      $this->logger->error('Image scale failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', ['%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()]);
       return FALSE;
     }
     return TRUE;
@@ -41,10 +41,10 @@ public function transformDimensions(array &$dimensions, $uri) {
    * {@inheritdoc}
    */
   public function getSummary() {
-    $summary = array(
+    $summary = [
       '#theme' => 'image_scale_summary',
       '#data' => $this->configuration,
-    );
+    ];
     $summary += parent::getSummary();
 
     return $summary;
@@ -54,9 +54,9 @@ public function getSummary() {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return parent::defaultConfiguration() + array(
+    return parent::defaultConfiguration() + [
       'upscale' => FALSE,
-    );
+    ];
   }
 
   /**
@@ -66,12 +66,12 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $form = parent::buildConfigurationForm($form, $form_state);
     $form['width']['#required'] = FALSE;
     $form['height']['#required'] = FALSE;
-    $form['upscale'] = array(
+    $form['upscale'] = [
       '#type' => 'checkbox',
       '#default_value' => $this->configuration['upscale'],
       '#title' => t('Allow Upscaling'),
       '#description' => t('Let scale make images larger than their original size.'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/image/src/Plugin/migrate/destination/EntityImageStyle.php b/core/modules/image/src/Plugin/migrate/destination/EntityImageStyle.php
index 20dabe7a958e174bb2b5f6466e376399ddb1733c..3fc1e7f4ed9d14437dee9f17d55e7dd529d99a21 100644
--- a/core/modules/image/src/Plugin/migrate/destination/EntityImageStyle.php
+++ b/core/modules/image/src/Plugin/migrate/destination/EntityImageStyle.php
@@ -46,7 +46,7 @@ public function import(Row $row, array $old_destination_id_values = []) {
 
     $style->save();
 
-    return array($style->id());
+    return [$style->id()];
   }
 
 }
diff --git a/core/modules/image/src/Plugin/migrate/source/d6/ImageCachePreset.php b/core/modules/image/src/Plugin/migrate/source/d6/ImageCachePreset.php
index 4266ff179774c3dd85b3dd3dad2eb68f3b6305f6..aade9abdb4c9c92c9caf2aea45b7efde4ab54543 100644
--- a/core/modules/image/src/Plugin/migrate/source/d6/ImageCachePreset.php
+++ b/core/modules/image/src/Plugin/migrate/source/d6/ImageCachePreset.php
@@ -47,7 +47,7 @@ public function getIds() {
    * {@inheritdoc}
    */
   public function prepareRow(Row $row) {
-    $actions = array();
+    $actions = [];
 
     $results = $this->select('imagecache_action', 'ica')
       ->fields('ica')
diff --git a/core/modules/image/src/Plugin/migrate/source/d7/ImageStyles.php b/core/modules/image/src/Plugin/migrate/source/d7/ImageStyles.php
index d680c789e602cb3e2fb10fc72b0716dd395dc4e7..dab62f3a9ef2904fb22c5b1ad39cc61a96fb6322 100644
--- a/core/modules/image/src/Plugin/migrate/source/d7/ImageStyles.php
+++ b/core/modules/image/src/Plugin/migrate/source/d7/ImageStyles.php
@@ -47,7 +47,7 @@ public function getIds() {
    * {@inheritdoc}
    */
   public function prepareRow(Row $row) {
-    $effects = array();
+    $effects = [];
 
     $results = $this->select('image_effects', 'ie')
       ->fields('ie')
diff --git a/core/modules/image/src/Routing/ImageStyleRoutes.php b/core/modules/image/src/Routing/ImageStyleRoutes.php
index 66f6bfa19cea03f88eaf3a8297a2517291c3e004..71960fec0adf69e1acc8441f2598edc9160bb21b 100644
--- a/core/modules/image/src/Routing/ImageStyleRoutes.php
+++ b/core/modules/image/src/Routing/ImageStyleRoutes.php
@@ -45,7 +45,7 @@ public static function create(ContainerInterface $container) {
    *   An array of route objects.
    */
   public function routes() {
-    $routes = array();
+    $routes = [];
     // Generate image derivatives of publicly available files. If clean URLs are
     // disabled image derivatives will always be served through the menu system.
     // If clean URLs are enabled and the image derivative already exists, PHP
@@ -54,12 +54,12 @@ public function routes() {
 
     $routes['image.style_public'] = new Route(
       '/' . $directory_path . '/styles/{image_style}/{scheme}',
-      array(
+      [
         '_controller' => 'Drupal\image\Controller\ImageStyleDownloadController::deliver',
-      ),
-      array(
+      ],
+      [
         '_access' => 'TRUE',
-      )
+      ]
     );
     return $routes;
   }
diff --git a/core/modules/image/src/Tests/FileMoveTest.php b/core/modules/image/src/Tests/FileMoveTest.php
index 195799446d2b5430c758591d0ab3b38847772e95..ce28a0b372f42bcab6237d89e1b0931e9c1e9a66 100644
--- a/core/modules/image/src/Tests/FileMoveTest.php
+++ b/core/modules/image/src/Tests/FileMoveTest.php
@@ -18,7 +18,7 @@ class FileMoveTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('image');
+  public static $modules = ['image'];
 
   /**
    * Tests moving a randomly generated image.
diff --git a/core/modules/image/src/Tests/ImageAdminStylesTest.php b/core/modules/image/src/Tests/ImageAdminStylesTest.php
index 4b7ff43e93c275e3c7267eac4d20f94f18fd6396..c8e92d344883ac45e28094444bfa91af38860a72 100644
--- a/core/modules/image/src/Tests/ImageAdminStylesTest.php
+++ b/core/modules/image/src/Tests/ImageAdminStylesTest.php
@@ -47,14 +47,14 @@ function getImageCount(ImageStyleInterface $style) {
   function testNumericStyleName() {
     $style_name = rand();
     $style_label = $this->randomString();
-    $edit = array(
+    $edit = [
       'name' => $style_name,
       'label' => $style_label,
-    );
+    ];
     $this->drupalPostForm('admin/config/media/image-styles/add', $edit, t('Create new style'));
-    $this->assertRaw(t('Style %name was created.', array('%name' => $style_label)));
+    $this->assertRaw(t('Style %name was created.', ['%name' => $style_label]));
     $options = image_style_options();
-    $this->assertTrue(array_key_exists($style_name, $options), format_string('Array key %key exists.', array('%key' => $style_name)));
+    $this->assertTrue(array_key_exists($style_name, $options), format_string('Array key %key exists.', ['%key' => $style_name]));
   }
 
   /**
@@ -67,43 +67,43 @@ function testStyle() {
     $style_name = strtolower($this->randomMachineName(10));
     $style_label = $this->randomString();
     $style_path = $admin_path . '/manage/' . $style_name;
-    $effect_edits = array(
-      'image_resize' => array(
+    $effect_edits = [
+      'image_resize' => [
         'width' => 100,
         'height' => 101,
-      ),
-      'image_scale' => array(
+      ],
+      'image_scale' => [
         'width' => 110,
         'height' => 111,
         'upscale' => 1,
-      ),
-      'image_scale_and_crop' => array(
+      ],
+      'image_scale_and_crop' => [
         'width' => 120,
         'height' => 121,
-      ),
-      'image_crop' => array(
+      ],
+      'image_crop' => [
         'width' => 130,
         'height' => 131,
         'anchor' => 'left-top',
-      ),
-      'image_desaturate' => array(
+      ],
+      'image_desaturate' => [
         // No options for desaturate.
-      ),
-      'image_rotate' => array(
+      ],
+      'image_rotate' => [
         'degrees' => 5,
         'random' => 1,
         'bgcolor' => '#FFFF00',
-      ),
-    );
+      ],
+    ];
 
     // Add style form.
 
-    $edit = array(
+    $edit = [
       'name' => $style_name,
       'label' => $style_label,
-    );
+    ];
     $this->drupalPostForm($admin_path . '/add', $edit, t('Create new style'));
-    $this->assertRaw(t('Style %name was created.', array('%name' => $style_label)));
+    $this->assertRaw(t('Style %name was created.', ['%name' => $style_label]));
 
     // Ensure that the expected entity operations are there.
     $this->drupalGet($admin_path);
@@ -115,12 +115,12 @@ function testStyle() {
 
     // Add each sample effect to the style.
     foreach ($effect_edits as $effect => $edit) {
-      $edit_data = array();
+      $edit_data = [];
       foreach ($edit as $field => $value) {
         $edit_data['data[' . $field . ']'] = $value;
       }
       // Add the effect.
-      $this->drupalPostForm($style_path, array('new' => $effect), t('Add'));
+      $this->drupalPostForm($style_path, ['new' => $effect], t('Add'));
       if (!empty($edit)) {
         $this->drupalPostForm(NULL, $edit_data, t('Add effect'));
       }
@@ -140,13 +140,13 @@ function testStyle() {
 
     // Confirm that all effects on the image style have settings that match
     // what was saved.
-    $uuids = array();
+    $uuids = [];
     foreach ($style->getEffects() as $uuid => $effect) {
       // Store the uuid for later use.
       $uuids[$effect->getPluginId()] = $uuid;
       $effect_configuration = $effect->getConfiguration();
       foreach ($effect_edits[$effect->getPluginId()] as $field => $value) {
-        $this->assertEqual($value, $effect_configuration['data'][$field], SafeMarkup::format('The %field field in the %effect effect has the correct value of %value.', array('%field' => $field, '%effect' => $effect->getPluginId(), '%value' => $value)));
+        $this->assertEqual($value, $effect_configuration['data'][$field], SafeMarkup::format('The %field field in the %effect effect has the correct value of %value.', ['%field' => $field, '%effect' => $effect->getPluginId(), '%value' => $value]));
       }
     }
 
@@ -154,10 +154,10 @@ function testStyle() {
     foreach (array_keys($effect_edits) as $effect_name) {
       $this->assertTrue(isset($uuids[$effect_name]), format_string(
         'A %effect_name effect was saved with ID %uuid',
-        array(
+        [
           '%effect_name' => $effect_name,
           '%uuid' => $uuids[$effect_name],
-        )));
+        ]));
     }
 
     // Image style overview form (ordering and renaming).
@@ -180,10 +180,10 @@ function testStyle() {
     $style_name = strtolower($this->randomMachineName(10));
     $style_label = $this->randomMachineName();
     $weight = count($effect_edits);
-    $edit = array(
+    $edit = [
       'name' => $style_name,
       'label' => $style_label,
-    );
+    ];
     foreach ($style->getEffects() as $uuid => $effect) {
       $edit['effects[' . $uuid . '][weight]'] = $weight;
       $weight--;
@@ -191,7 +191,7 @@ function testStyle() {
 
     // Create an image to make sure it gets flushed after saving.
     $image_path = $this->createSampleImage($style);
-    $this->assertEqual($this->getImageCount($style), 1, format_string('Image style %style image %file successfully generated.', array('%style' => $style->label(), '%file' => $image_path)));
+    $this->assertEqual($this->getImageCount($style), 1, format_string('Image style %style image %file successfully generated.', ['%style' => $style->label(), '%file' => $image_path]));
 
     $this->drupalPostForm($style_path, $edit, t('Update style'));
 
@@ -200,13 +200,13 @@ function testStyle() {
 
     // Check that the URL was updated.
     $this->drupalGet($style_path);
-    $this->assertTitle(t('Edit style @name | Drupal', array('@name' => $style_label)));
-    $this->assertResponse(200, format_string('Image style %original renamed to %new', array('%original' => $style->id(), '%new' => $style_name)));
+    $this->assertTitle(t('Edit style @name | Drupal', ['@name' => $style_label]));
+    $this->assertResponse(200, format_string('Image style %original renamed to %new', ['%original' => $style->id(), '%new' => $style_name]));
 
     // Check that the image was flushed after updating the style.
     // This is especially important when renaming the style. Make sure that
     // the old image directory has been deleted.
-    $this->assertEqual($this->getImageCount($style), 0, format_string('Image style %style was flushed after renaming the style and updating the order of effects.', array('%style' => $style->label())));
+    $this->assertEqual($this->getImageCount($style), 0, format_string('Image style %style was flushed after renaming the style and updating the order of effects.', ['%style' => $style->label()]));
 
     // Load the style by the new name with the new weights.
     $style = ImageStyle::load($style_name);
@@ -227,14 +227,14 @@ function testStyle() {
 
     // Create an image to make sure it gets flushed after deleting an effect.
     $image_path = $this->createSampleImage($style);
-    $this->assertEqual($this->getImageCount($style), 1, format_string('Image style %style image %file successfully generated.', array('%style' => $style->label(), '%file' => $image_path)));
+    $this->assertEqual($this->getImageCount($style), 1, format_string('Image style %style image %file successfully generated.', ['%style' => $style->label(), '%file' => $image_path]));
 
     // Delete the 'image_crop' effect from the style.
-    $this->drupalPostForm($style_path . '/effects/' . $uuids['image_crop'] . '/delete', array(), t('Delete'));
+    $this->drupalPostForm($style_path . '/effects/' . $uuids['image_crop'] . '/delete', [], t('Delete'));
     // Confirm that the form submission was successful.
     $this->assertResponse(200);
     $image_crop_effect = $style->getEffect($uuids['image_crop']);
-    $this->assertRaw(t('The image effect %name has been deleted.', array('%name' => $image_crop_effect->label())));
+    $this->assertRaw(t('The image effect %name has been deleted.', ['%name' => $image_crop_effect->label()]));
     // Confirm that there is no longer a link to the effect.
     $this->assertNoLinkByHref($style_path . '/effects/' . $uuids['image_crop'] . '/delete');
     // Refresh the image style information and verify that the effect was
@@ -243,18 +243,18 @@ function testStyle() {
     $style = $entity_type_manager->getStorage('image_style')->loadUnchanged($style->id());
     $this->assertFalse($style->getEffects()->has($uuids['image_crop']), format_string(
       'Effect with ID %uuid no longer found on image style %style',
-      array(
+      [
         '%uuid' => $uuids['image_crop'],
         '%style' => $style->label(),
-      )));
+      ]));
 
     // Additional test on Rotate effect, for transparent background.
-    $edit = array(
+    $edit = [
       'data[degrees]' => 5,
       'data[random]' => 0,
       'data[bgcolor]' => '',
-    );
-    $this->drupalPostForm($style_path, array('new' => 'image_rotate'), t('Add'));
+    ];
+    $this->drupalPostForm($style_path, ['new' => 'image_rotate'], t('Add'));
     $this->drupalPostForm(NULL, $edit, t('Add effect'));
     $entity_type_manager = $this->container->get('entity_type.manager');
     $style = $entity_type_manager->getStorage('image_style')->loadUnchanged($style_name);
@@ -263,13 +263,13 @@ function testStyle() {
     // Style deletion form.
 
     // Delete the style.
-    $this->drupalPostForm($style_path . '/delete', array(), t('Delete'));
+    $this->drupalPostForm($style_path . '/delete', [], t('Delete'));
 
     // Confirm the style directory has been removed.
     $directory = file_default_scheme() . '://styles/' . $style_name;
-    $this->assertFalse(is_dir($directory), format_string('Image style %style directory removed on style deletion.', array('%style' => $style->label())));
+    $this->assertFalse(is_dir($directory), format_string('Image style %style directory removed on style deletion.', ['%style' => $style->label()]));
 
-    $this->assertFalse(ImageStyle::load($style_name), format_string('Image style %style successfully deleted.', array('%style' => $style->label())));
+    $this->assertFalse(ImageStyle::load($style_name), format_string('Image style %style successfully deleted.', ['%style' => $style->label()]));
 
     // Test empty text when there are no image styles.
 
@@ -334,7 +334,7 @@ function testStyleReplacement() {
     // Create a new style.
     $style_name = strtolower($this->randomMachineName(10));
     $style_label = $this->randomString();
-    $style = ImageStyle::create(array('name' => $style_name, 'label' => $style_label));
+    $style = ImageStyle::create(['name' => $style_name, 'label' => $style_label]);
     $style->save();
     $style_path = 'admin/config/media/image-styles/manage/';
 
@@ -342,10 +342,10 @@ function testStyleReplacement() {
     $field_name = strtolower($this->randomMachineName(10));
     $this->createImageField($field_name, 'article');
     entity_get_display('node', 'article', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'image',
-        'settings' => array('image_style' => $style_name),
-      ))
+        'settings' => ['image_style' => $style_name],
+      ])
       ->save();
 
     // Create a new node with an image attached.
@@ -359,17 +359,17 @@ function testStyleReplacement() {
 
     // Test that image is displayed using newly created style.
     $this->drupalGet('node/' . $nid);
-    $this->assertRaw(file_url_transform_relative($style->buildUrl($original_uri)), format_string('Image displayed using style @style.', array('@style' => $style_name)));
+    $this->assertRaw(file_url_transform_relative($style->buildUrl($original_uri)), format_string('Image displayed using style @style.', ['@style' => $style_name]));
 
     // Rename the style and make sure the image field is updated.
     $new_style_name = strtolower($this->randomMachineName(10));
     $new_style_label = $this->randomString();
-    $edit = array(
+    $edit = [
       'name' => $new_style_name,
       'label' => $new_style_label,
-    );
+    ];
     $this->drupalPostForm($style_path . $style_name, $edit, t('Update style'));
-    $this->assertText(t('Changes to the style have been saved.'), format_string('Style %name was renamed to %new_name.', array('%name' => $style_name, '%new_name' => $new_style_name)));
+    $this->assertText(t('Changes to the style have been saved.'), format_string('Style %name was renamed to %new_name.', ['%name' => $style_name, '%new_name' => $new_style_name]));
     $this->drupalGet('node/' . $nid);
 
     // Reload the image style using the new name.
@@ -377,11 +377,11 @@ function testStyleReplacement() {
     $this->assertRaw(file_url_transform_relative($style->buildUrl($original_uri)), 'Image displayed using style replacement style.');
 
     // Delete the style and choose a replacement style.
-    $edit = array(
+    $edit = [
       'replacement' => 'thumbnail',
-    );
+    ];
     $this->drupalPostForm($style_path . $new_style_name . '/delete', $edit, t('Delete'));
-    $message = t('The image style %name has been deleted.', array('%name' => $new_style_label));
+    $message = t('The image style %name has been deleted.', ['%name' => $new_style_label]);
     $this->assertRaw($message);
 
     $replacement_style = ImageStyle::load('thumbnail');
@@ -396,14 +396,14 @@ function testEditEffect() {
     // Add a scale effect.
     $style_name = 'test_style_effect_edit';
     $this->drupalGet('admin/config/media/image-styles/add');
-    $this->drupalPostForm(NULL, array('label' => 'Test style effect edit', 'name' => $style_name), t('Create new style'));
-    $this->drupalPostForm(NULL, array('new' => 'image_scale_and_crop'), t('Add'));
-    $this->drupalPostForm(NULL, array('data[width]' => '300', 'data[height]' => '200'), t('Add effect'));
+    $this->drupalPostForm(NULL, ['label' => 'Test style effect edit', 'name' => $style_name], t('Create new style'));
+    $this->drupalPostForm(NULL, ['new' => 'image_scale_and_crop'], t('Add'));
+    $this->drupalPostForm(NULL, ['data[width]' => '300', 'data[height]' => '200'], t('Add effect'));
     $this->assertText(t('Scale and crop 300×200'));
 
     // There should normally be only one edit link on this page initially.
     $this->clickLink(t('Edit'));
-    $this->drupalPostForm(NULL, array('data[width]' => '360', 'data[height]' => '240'), t('Update effect'));
+    $this->drupalPostForm(NULL, ['data[width]' => '360', 'data[height]' => '240'], t('Update effect'));
     $this->assertText(t('Scale and crop 360×240'));
 
     // Check that the previous effect is replaced.
@@ -411,17 +411,17 @@ function testEditEffect() {
 
     // Add another scale effect.
     $this->drupalGet('admin/config/media/image-styles/add');
-    $this->drupalPostForm(NULL, array('label' => 'Test style scale edit scale', 'name' => 'test_style_scale_edit_scale'), t('Create new style'));
-    $this->drupalPostForm(NULL, array('new' => 'image_scale'), t('Add'));
-    $this->drupalPostForm(NULL, array('data[width]' => '12', 'data[height]' => '19'), t('Add effect'));
+    $this->drupalPostForm(NULL, ['label' => 'Test style scale edit scale', 'name' => 'test_style_scale_edit_scale'], t('Create new style'));
+    $this->drupalPostForm(NULL, ['new' => 'image_scale'], t('Add'));
+    $this->drupalPostForm(NULL, ['data[width]' => '12', 'data[height]' => '19'], t('Add effect'));
 
     // Edit the scale effect that was just added.
     $this->clickLink(t('Edit'));
-    $this->drupalPostForm(NULL, array('data[width]' => '24', 'data[height]' => '19'), t('Update effect'));
-    $this->drupalPostForm(NULL, array('new' => 'image_scale'), t('Add'));
+    $this->drupalPostForm(NULL, ['data[width]' => '24', 'data[height]' => '19'], t('Update effect'));
+    $this->drupalPostForm(NULL, ['new' => 'image_scale'], t('Add'));
 
     // Add another scale effect and make sure both exist.
-    $this->drupalPostForm(NULL, array('data[width]' => '12', 'data[height]' => '19'), t('Add effect'));
+    $this->drupalPostForm(NULL, ['data[width]' => '12', 'data[height]' => '19'], t('Add effect'));
     $this->assertText(t('Scale 24×19'));
     $this->assertText(t('Scale 12×19'));
 
@@ -439,7 +439,7 @@ public function testFlushUserInterface() {
 
     // Create a new style.
     $style_name = strtolower($this->randomMachineName(10));
-    $style = ImageStyle::create(array('name' => $style_name, 'label' => $this->randomString()));
+    $style = ImageStyle::create(['name' => $style_name, 'label' => $this->randomString()]);
     $style->save();
 
     // Create an image to make sure it gets flushed.
@@ -456,7 +456,7 @@ public function testFlushUserInterface() {
     $this->assertLinkByHref($flush_path);
 
     // Flush the image style derivatives using the user interface.
-    $this->drupalPostForm($flush_path, array(), t('Flush'));
+    $this->drupalPostForm($flush_path, [], t('Flush'));
 
     // The derivative image file should have been deleted.
     $this->assertEqual($this->getImageCount($style), 0);
@@ -469,17 +469,17 @@ function testConfigImport() {
     // Create a new style.
     $style_name = strtolower($this->randomMachineName(10));
     $style_label = $this->randomString();
-    $style = ImageStyle::create(array('name' => $style_name, 'label' => $style_label));
+    $style = ImageStyle::create(['name' => $style_name, 'label' => $style_label]);
     $style->save();
 
     // Create an image field that uses the new style.
     $field_name = strtolower($this->randomMachineName(10));
     $this->createImageField($field_name, 'article');
     entity_get_display('node', 'article', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'image',
-        'settings' => array('image_style' => $style_name),
-      ))
+        'settings' => ['image_style' => $style_name],
+      ])
       ->save();
 
     // Create a new node with an image attached.
@@ -493,7 +493,7 @@ function testConfigImport() {
 
     // Test that image is displayed using newly created style.
     $this->drupalGet('node/' . $nid);
-    $this->assertRaw(file_url_transform_relative($style->buildUrl($original_uri)), format_string('Image displayed using style @style.', array('@style' => $style_name)));
+    $this->assertRaw(file_url_transform_relative($style->buildUrl($original_uri)), format_string('Image displayed using style @style.', ['@style' => $style_name]));
 
     // Copy config to sync, and delete the image style.
     $sync = $this->container->get('config.storage.sync');
@@ -515,7 +515,7 @@ function testConfigImport() {
    * Tests access for the image style listing.
    */
   public function testImageStyleAccess() {
-    $style = ImageStyle::create(array('name' => 'style_foo', 'label' => $this->randomString()));
+    $style = ImageStyle::create(['name' => 'style_foo', 'label' => $this->randomString()]);
     $style->save();
 
     $this->drupalGet('admin/config/media/image-styles');
diff --git a/core/modules/image/src/Tests/ImageDimensionsTest.php b/core/modules/image/src/Tests/ImageDimensionsTest.php
index 6f73042cc3d7cebecf2b47fad4e859544839dcf9..365a6aa086e9bc2de969521e666231a59a94b25b 100644
--- a/core/modules/image/src/Tests/ImageDimensionsTest.php
+++ b/core/modules/image/src/Tests/ImageDimensionsTest.php
@@ -17,7 +17,7 @@ class ImageDimensionsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('image', 'image_module_test');
+  public static $modules = ['image', 'image_module_test'];
 
   protected $profile = 'testing';
 
@@ -33,33 +33,33 @@ function testImageDimensions() {
 
     // Create a style.
     /** @var $style \Drupal\image\ImageStyleInterface */
-    $style = ImageStyle::create(array('name' => 'test', 'label' => 'Test'));
+    $style = ImageStyle::create(['name' => 'test', 'label' => 'Test']);
     $style->save();
     $generated_uri = 'public://styles/test/public/' . \Drupal::service('file_system')->basename($original_uri);
     $url = file_url_transform_relative($style->buildUrl($original_uri));
 
-    $variables = array(
+    $variables = [
       '#theme' => 'image_style',
       '#style_name' => 'test',
       '#uri' => $original_uri,
       '#width' => 40,
       '#height' => 20,
-    );
+    ];
     // Verify that the original image matches the hard-coded values.
     $image_file = $image_factory->get($original_uri);
     $this->assertEqual($image_file->getWidth(), $variables['#width']);
     $this->assertEqual($image_file->getHeight(), $variables['#height']);
 
     // Scale an image that is wider than it is high.
-    $effect = array(
+    $effect = [
       'id' => 'image_scale',
-      'data' => array(
+      'data' => [
         'width' => 120,
         'height' => 90,
         'upscale' => TRUE,
-      ),
+      ],
       'weight' => 0,
-    );
+    ];
 
     $style->addImageEffect($effect);
     $style->save();
@@ -73,14 +73,14 @@ function testImageDimensions() {
     $this->assertEqual($image_file->getHeight(), 60);
 
     // Rotate 90 degrees anticlockwise.
-    $effect = array(
+    $effect = [
       'id' => 'image_rotate',
-      'data' => array(
+      'data' => [
         'degrees' => -90,
         'random' => FALSE,
-      ),
+      ],
       'weight' => 1,
-    );
+    ];
 
     $style->addImageEffect($effect);
     $style->save();
@@ -94,15 +94,15 @@ function testImageDimensions() {
     $this->assertEqual($image_file->getHeight(), 120);
 
     // Scale an image that is higher than it is wide (rotated by previous effect).
-    $effect = array(
+    $effect = [
       'id' => 'image_scale',
-      'data' => array(
+      'data' => [
         'width' => 120,
         'height' => 90,
         'upscale' => TRUE,
-      ),
+      ],
       'weight' => 2,
-    );
+    ];
 
     $style->addImageEffect($effect);
     $style->save();
@@ -116,15 +116,15 @@ function testImageDimensions() {
     $this->assertEqual($image_file->getHeight(), 90);
 
     // Test upscale disabled.
-    $effect = array(
+    $effect = [
       'id' => 'image_scale',
-      'data' => array(
+      'data' => [
         'width' => 400,
         'height' => 200,
         'upscale' => FALSE,
-      ),
+      ],
       'weight' => 3,
-    );
+    ];
 
     $style->addImageEffect($effect);
     $style->save();
@@ -138,11 +138,11 @@ function testImageDimensions() {
     $this->assertEqual($image_file->getHeight(), 90);
 
     // Add a desaturate effect.
-    $effect = array(
+    $effect = [
       'id' => 'image_desaturate',
-      'data' => array(),
+      'data' => [],
       'weight' => 4,
-    );
+    ];
 
     $style->addImageEffect($effect);
     $style->save();
@@ -156,14 +156,14 @@ function testImageDimensions() {
     $this->assertEqual($image_file->getHeight(), 90);
 
     // Add a random rotate effect.
-    $effect = array(
+    $effect = [
       'id' => 'image_rotate',
-      'data' => array(
+      'data' => [
         'degrees' => 180,
         'random' => TRUE,
-      ),
+      ],
       'weight' => 5,
-    );
+    ];
 
     $style->addImageEffect($effect);
     $style->save();
@@ -175,15 +175,15 @@ function testImageDimensions() {
 
 
     // Add a crop effect.
-    $effect = array(
+    $effect = [
       'id' => 'image_crop',
-      'data' => array(
+      'data' => [
         'width' => 30,
         'height' => 30,
         'anchor' => 'center-center',
-      ),
+      ],
       'weight' => 6,
-    );
+    ];
 
     $style->addImageEffect($effect);
     $style->save();
@@ -197,14 +197,14 @@ function testImageDimensions() {
     $this->assertEqual($image_file->getHeight(), 30);
 
     // Rotate to a non-multiple of 90 degrees.
-    $effect = array(
+    $effect = [
       'id' => 'image_rotate',
-      'data' => array(
+      'data' => [
         'degrees' => 57,
         'random' => FALSE,
-      ),
+      ],
       'weight' => 7,
-    );
+    ];
 
     $effect_id = $style->addImageEffect($effect);
     $style->save();
@@ -221,11 +221,11 @@ function testImageDimensions() {
     $style->deleteImageEffect($effect_plugin);
 
     // Ensure that an effect can unset dimensions.
-    $effect = array(
+    $effect = [
       'id' => 'image_module_test_null',
-      'data' => array(),
+      'data' => [],
       'weight' => 8,
-    );
+    ];
 
     $style->addImageEffect($effect);
     $style->save();
diff --git a/core/modules/image/src/Tests/ImageFieldDefaultImagesTest.php b/core/modules/image/src/Tests/ImageFieldDefaultImagesTest.php
index a0f0274973ba93b23a797e8e9a2045158fa6da2f..d04a1c4d702f33c02083001f99a635a806d4de3c 100644
--- a/core/modules/image/src/Tests/ImageFieldDefaultImagesTest.php
+++ b/core/modules/image/src/Tests/ImageFieldDefaultImagesTest.php
@@ -19,7 +19,7 @@ class ImageFieldDefaultImagesTest extends ImageFieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_ui');
+  public static $modules = ['field_ui'];
 
   /**
    * Tests CRUD for fields and fields fields with default images.
@@ -36,8 +36,8 @@ public function testDefaultImages() {
       $file = File::create(['uri' => $desired_filepath, 'filename' => $filename, 'name' => $filename]);
       $file->save();
     }
-    $default_images = array();
-    foreach (array('field', 'field', 'field2', 'field_new', 'field_new') as $image_target) {
+    $default_images = [];
+    foreach (['field', 'field', 'field2', 'field_new', 'field_new'] as $image_target) {
       $file = File::create((array) array_pop($files));
       $file->save();
       $default_images[$image_target] = $file;
@@ -45,23 +45,23 @@ public function testDefaultImages() {
 
     // Create an image field and add an field to the article content type.
     $field_name = strtolower($this->randomMachineName());
-    $storage_settings['default_image'] = array(
+    $storage_settings['default_image'] = [
       'uuid' => $default_images['field']->uuid(),
       'alt' => '',
       'title' => '',
       'width' => 0,
       'height' => 0,
-    );
-    $field_settings['default_image'] = array(
+    ];
+    $field_settings['default_image'] = [
       'uuid' => $default_images['field']->uuid(),
       'alt' => '',
       'title' => '',
       'width' => 0,
       'height' => 0,
-    );
-    $widget_settings = array(
+    ];
+    $widget_settings = [
       'preview_image_style' => 'medium',
-    );
+    ];
     $field = $this->createImageField($field_name, 'article', $storage_settings, $field_settings, $widget_settings);
 
     // The field default image id should be 2.
@@ -84,15 +84,15 @@ public function testDefaultImages() {
       'bundle' => 'page',
       'label' => $field->label(),
       'required' => $field->isRequired(),
-      'settings' => array(
-        'default_image' => array(
+      'settings' => [
+        'default_image' => [
           'uuid' => $default_images['field2']->uuid(),
           'alt' => '',
           'title' => '',
           'width' => 0,
           'height' => 0,
-        ),
-      ),
+        ],
+      ],
     ]);
     $field2->save();
 
@@ -112,7 +112,7 @@ public function testDefaultImages() {
       $default_images['field']->id(),
       format_string(
         'Article image field default equals expected file ID of @fid.',
-        array('@fid' => $default_images['field']->id())
+        ['@fid' => $default_images['field']->id()]
       )
     );
     // Confirm the defaults are present on the article field edit form.
@@ -122,7 +122,7 @@ public function testDefaultImages() {
       $default_images['field']->id(),
       format_string(
         'Article image field field default equals expected file ID of @fid.',
-        array('@fid' => $default_images['field']->id())
+        ['@fid' => $default_images['field']->id()]
       )
     );
 
@@ -133,7 +133,7 @@ public function testDefaultImages() {
       $default_images['field']->id(),
       format_string(
         'Page image field default equals expected file ID of @fid.',
-        array('@fid' => $default_images['field']->id())
+        ['@fid' => $default_images['field']->id()]
       )
     );
     // Confirm the defaults are present on the page field edit form.
@@ -144,38 +144,38 @@ public function testDefaultImages() {
       $default_images['field2']->id(),
       format_string(
         'Page image field field default equals expected file ID of @fid.',
-        array('@fid' => $default_images['field2']->id())
+        ['@fid' => $default_images['field2']->id()]
       )
     );
 
     // Confirm that the image default is shown for a new article node.
-    $article = $this->drupalCreateNode(array('type' => 'article'));
+    $article = $this->drupalCreateNode(['type' => 'article']);
     $article_built = $this->drupalBuildEntityView($article);
     $this->assertEqual(
       $article_built[$field_name][0]['#item']->target_id,
       $default_images['field']->id(),
       format_string(
         'A new article node without an image has the expected default image file ID of @fid.',
-        array('@fid' => $default_images['field']->id())
+        ['@fid' => $default_images['field']->id()]
       )
     );
 
     // Also check that the field renders without warnings when the label is
     // hidden.
     EntityViewDisplay::load('node.article.default')
-      ->setComponent($field_name, array('label' => 'hidden', 'type' => 'image'))
+      ->setComponent($field_name, ['label' => 'hidden', 'type' => 'image'])
       ->save();
     $this->drupalGet('node/' . $article->id());
 
     // Confirm that the image default is shown for a new page node.
-    $page = $this->drupalCreateNode(array('type' => 'page'));
+    $page = $this->drupalCreateNode(['type' => 'page']);
     $page_built = $this->drupalBuildEntityView($page);
     $this->assertEqual(
       $page_built[$field_name][0]['#item']->target_id,
       $default_images['field2']->id(),
       format_string(
         'A new page node without an image has the expected default image file ID of @fid.',
-        array('@fid' => $default_images['field2']->id())
+        ['@fid' => $default_images['field2']->id()]
       )
     );
 
@@ -192,12 +192,12 @@ public function testDefaultImages() {
       $default_images['field_new']->id(),
       format_string(
         'Updated image field default equals expected file ID of @fid.',
-        array('@fid' => $default_images['field_new']->id())
+        ['@fid' => $default_images['field_new']->id()]
       )
     );
 
     // Reload the nodes and confirm the field field defaults are used.
-    $node_storage->resetCache(array($article->id(), $page->id()));
+    $node_storage->resetCache([$article->id(), $page->id()]);
     $article_built = $this->drupalBuildEntityView($article = $node_storage->load($article->id()));
     $page_built = $this->drupalBuildEntityView($page = $node_storage->load($page->id()));
     $this->assertEqual(
@@ -205,7 +205,7 @@ public function testDefaultImages() {
       $default_images['field']->id(),
       format_string(
         'An existing article node without an image has the expected default image file ID of @fid.',
-        array('@fid' => $default_images['field']->id())
+        ['@fid' => $default_images['field']->id()]
       )
     );
     $this->assertEqual(
@@ -213,7 +213,7 @@ public function testDefaultImages() {
       $default_images['field2']->id(),
       format_string(
         'An existing page node without an image has the expected default image file ID of @fid.',
-        array('@fid' => $default_images['field2']->id())
+        ['@fid' => $default_images['field2']->id()]
       )
     );
 
@@ -231,12 +231,12 @@ public function testDefaultImages() {
       $default_images['field_new']->id(),
       format_string(
         'Updated article image field field default equals expected file ID of @fid.',
-        array('@fid' => $default_images['field_new']->id())
+        ['@fid' => $default_images['field_new']->id()]
       )
     );
 
     // Reload the nodes.
-    $node_storage->resetCache(array($article->id(), $page->id()));
+    $node_storage->resetCache([$article->id(), $page->id()]);
     $article_built = $this->drupalBuildEntityView($article = $node_storage->load($article->id()));
     $page_built = $this->drupalBuildEntityView($page = $node_storage->load($page->id()));
 
@@ -246,7 +246,7 @@ public function testDefaultImages() {
       $default_images['field_new']->id(),
       format_string(
         'An existing article node without an image has the expected default image file ID of @fid.',
-        array('@fid' => $default_images['field_new']->id())
+        ['@fid' => $default_images['field_new']->id()]
       )
     );
     // Confirm the page remains unchanged.
@@ -255,7 +255,7 @@ public function testDefaultImages() {
       $default_images['field2']->id(),
       format_string(
         'An existing page node without an image has the expected default image file ID of @fid.',
-        array('@fid' => $default_images['field2']->id())
+        ['@fid' => $default_images['field2']->id()]
       )
     );
 
@@ -279,7 +279,7 @@ public function testDefaultImages() {
     );
 
     // Reload the nodes.
-    $node_storage->resetCache(array($article->id(), $page->id()));
+    $node_storage->resetCache([$article->id(), $page->id()]);
     $article_built = $this->drupalBuildEntityView($article = $node_storage->load($article->id()));
     $page_built = $this->drupalBuildEntityView($page = $node_storage->load($page->id()));
     // Confirm the article uses the new field (not field) default.
@@ -288,7 +288,7 @@ public function testDefaultImages() {
       $default_images['field_new']->id(),
       format_string(
         'An existing article node without an image has the expected default image file ID of @fid.',
-        array('@fid' => $default_images['field_new']->id())
+        ['@fid' => $default_images['field_new']->id()]
       )
     );
     // Confirm the page remains unchanged.
@@ -297,12 +297,12 @@ public function testDefaultImages() {
       $default_images['field2']->id(),
       format_string(
         'An existing page node without an image has the expected default image file ID of @fid.',
-        array('@fid' => $default_images['field2']->id())
+        ['@fid' => $default_images['field2']->id()]
       )
     );
 
     $non_image = $this->drupalGetTestFiles('text');
-    $this->drupalPostForm(NULL, array('files[settings_default_image_uuid]' => drupal_realpath($non_image[0]->uri)), t("Upload"));
+    $this->drupalPostForm(NULL, ['files[settings_default_image_uuid]' => drupal_realpath($non_image[0]->uri)], t("Upload"));
     $this->assertText('The specified file text-0.txt could not be uploaded.');
     $this->assertText('Only files with the following extensions are allowed: png gif jpg jpeg.');
 
@@ -316,16 +316,16 @@ public function testDefaultImages() {
    * Tests image field and field having an invalid default image.
    */
   public function testInvalidDefaultImage() {
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => Unicode::strtolower($this->randomMachineName()),
       'entity_type' => 'node',
       'type' => 'image',
-      'settings' => array(
-        'default_image' => array(
+      'settings' => [
+        'default_image' => [
           'uuid' => 100000,
-        )
-      ),
-    ));
+        ]
+      ],
+    ]);
     $field_storage->save();
     $settings = $field_storage->getSettings();
     // The non-existent default image should not be saved.
@@ -335,11 +335,11 @@ public function testInvalidDefaultImage() {
       'field_storage' => $field_storage,
       'bundle' => 'page',
       'label' => $this->randomMachineName(),
-      'settings' => array(
-        'default_image' => array(
+      'settings' => [
+        'default_image' => [
           'uuid' => 100000,
-        )
-      ),
+        ]
+      ],
     ]);
     $field->save();
     $settings = $field->getSettings();
diff --git a/core/modules/image/src/Tests/ImageFieldDisplayTest.php b/core/modules/image/src/Tests/ImageFieldDisplayTest.php
index f3ce858743588308b145ec7ec8bc725915c215fe..d2b4ffea29a1261370ba0f95dffa5ea77befa0b4 100644
--- a/core/modules/image/src/Tests/ImageFieldDisplayTest.php
+++ b/core/modules/image/src/Tests/ImageFieldDisplayTest.php
@@ -21,7 +21,7 @@ class ImageFieldDisplayTest extends ImageFieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_ui');
+  public static $modules = ['field_ui'];
 
   /**
    * Test image formatters on node display for public files.
@@ -35,7 +35,7 @@ function testImageFieldFormattersPublic() {
    */
   function testImageFieldFormattersPrivate() {
     // Remove access content permission from anonymous users.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array('access content' => FALSE));
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, ['access content' => FALSE]);
     $this->_testImageFieldFormatters('private');
   }
 
@@ -47,29 +47,29 @@ function _testImageFieldFormatters($scheme) {
     $renderer = $this->container->get('renderer');
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $field_name = strtolower($this->randomMachineName());
-    $field_settings = array('alt_field_required' => 0);
-    $instance = $this->createImageField($field_name, 'article', array('uri_scheme' => $scheme), $field_settings);
+    $field_settings = ['alt_field_required' => 0];
+    $instance = $this->createImageField($field_name, 'article', ['uri_scheme' => $scheme], $field_settings);
 
     // Go to manage display page.
     $this->drupalGet("admin/structure/types/manage/article/display");
 
     // Test for existence of link to image styles configuration.
-    $this->drupalPostAjaxForm(NULL, array(), "{$field_name}_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "{$field_name}_settings_edit");
     $this->assertLinkByHref(\Drupal::url('entity.image_style.collection'), 0, 'Link to image styles configuration is found');
 
     // Remove 'administer image styles' permission from testing admin user.
     $admin_user_roles = $this->adminUser->getRoles(TRUE);
-    user_role_change_permissions(reset($admin_user_roles), array('administer image styles' => FALSE));
+    user_role_change_permissions(reset($admin_user_roles), ['administer image styles' => FALSE]);
 
     // Go to manage display page again.
     $this->drupalGet("admin/structure/types/manage/article/display");
 
     // Test for absence of link to image styles configuration.
-    $this->drupalPostAjaxForm(NULL, array(), "{$field_name}_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "{$field_name}_settings_edit");
     $this->assertNoLinkByHref(\Drupal::url('entity.image_style.collection'), 'Link to image styles configuration is absent when permissions are insufficient');
 
     // Restore 'administer image styles' permission to testing admin user
-    user_role_change_permissions(reset($admin_user_roles), array('administer image styles' => TRUE));
+    user_role_change_permissions(reset($admin_user_roles), ['administer image styles' => TRUE]);
 
     // Create a new node with an image attached.
     $test_image = current($this->drupalGetTestFiles('image'));
@@ -87,38 +87,38 @@ function _testImageFieldFormatters($scheme) {
 
     // Save node.
     $nid = $this->uploadNodeImage($test_image, $field_name, 'article', $alt);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
 
     // Test that the default formatter is being used.
     $file = $node->{$field_name}->entity;
     $image_uri = $file->getFileUri();
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#uri' => $image_uri,
       '#width' => 40,
       '#height' => 20,
       '#alt' => $alt,
-    );
+    ];
     $default_output = str_replace("\n", NULL, $renderer->renderRoot($image));
     $this->assertRaw($default_output, 'Default formatter displaying correctly on full node view.');
 
     // Test the image linked to file formatter.
-    $display_options = array(
+    $display_options = [
       'type' => 'image',
-      'settings' => array('image_link' => 'file'),
-    );
+      'settings' => ['image_link' => 'file'],
+    ];
     $display = entity_get_display('node', $node->getType(), 'default');
     $display->setComponent($field_name, $display_options)
       ->save();
 
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#uri' => $image_uri,
       '#width' => 40,
       '#height' => 20,
       '#alt' => $alt,
-    );
+    ];
     $default_output = '<a href="' . file_create_url($image_uri) . '">' . $renderer->renderRoot($image) . '</a>';
     $this->drupalGet('node/' . $nid);
     $this->assertCacheTag($file->getCacheTags()[0]);
@@ -148,25 +148,25 @@ function _testImageFieldFormatters($scheme) {
     $display_options['settings']['image_link'] = 'content';
     $display->setComponent($field_name, $display_options)
       ->save();
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#uri' => $image_uri,
       '#width' => 40,
       '#height' => 20,
-    );
+    ];
     $this->drupalGet('node/' . $nid);
     $this->assertCacheTag($file->getCacheTags()[0]);
     $cache_tags_header = $this->drupalGetHeader('X-Drupal-Cache-Tags');
     $this->assertTrue(!preg_match('/ image_style\:/', $cache_tags_header), 'No image style cache tag found.');
     $elements = $this->xpath(
       '//a[@href=:path]/img[@src=:url and @alt=:alt and @width=:width and @height=:height]',
-      array(
+      [
         ':path' => $node->url(),
         ':url' => file_url_transform_relative(file_create_url($image['#uri'])),
         ':width' => $image['#width'],
         ':height' => $image['#height'],
         ':alt' => $alt,
-      )
+      ]
     );
     $this->assertEqual(count($elements), 1, 'Image linked to content formatter displaying correctly on full node view.');
 
@@ -179,14 +179,14 @@ function _testImageFieldFormatters($scheme) {
     // Ensure the derivative image is generated so we do not have to deal with
     // image style callback paths.
     $this->drupalGet(ImageStyle::load('thumbnail')->buildUrl($image_uri));
-    $image_style = array(
+    $image_style = [
       '#theme' => 'image_style',
       '#uri' => $image_uri,
       '#width' => 40,
       '#height' => 20,
       '#style_name' => 'thumbnail',
       '#alt' => $alt,
-    );
+    ];
     $default_output = $renderer->renderRoot($image_style);
     $this->drupalGet('node/' . $nid);
     $image_style = ImageStyle::load('thumbnail');
@@ -224,18 +224,18 @@ function testImageFieldSettings() {
     $test_image = current($this->drupalGetTestFiles('image'));
     list(, $test_image_extension) = explode('.', $test_image->filename);
     $field_name = strtolower($this->randomMachineName());
-    $field_settings = array(
+    $field_settings = [
       'alt_field' => 1,
       'file_extensions' => $test_image_extension,
       'max_filesize' => '50 KB',
       'max_resolution' => '100x100',
       'min_resolution' => '10x10',
       'title_field' => 1,
-    );
-    $widget_settings = array(
+    ];
+    $widget_settings = [
       'preview_image_style' => 'medium',
-    );
-    $field = $this->createImageField($field_name, 'article', array(), $field_settings, $widget_settings);
+    ];
+    $field = $this->createImageField($field_name, 'article', [], $field_settings, $widget_settings);
 
     // Verify that the min/max resolution set on the field are properly
     // extracted, and displayed, on the image field's configuration form.
@@ -247,7 +247,7 @@ function testImageFieldSettings() {
 
     $this->drupalGet('node/add/article');
     $this->assertText(t('50 KB limit.'), 'Image widget max file size is displayed on article form.');
-    $this->assertText(t('Allowed types: @extensions.', array('@extensions' => $test_image_extension)), 'Image widget allowed file types displayed on article form.');
+    $this->assertText(t('Allowed types: @extensions.', ['@extensions' => $test_image_extension]), 'Image widget allowed file types displayed on article form.');
     $this->assertText(t('Images must be larger than 10x10 pixels. Images larger than 100x100 pixels will be resized.'), 'Image widget allowed resolution displayed on article form.');
 
     // We have to create the article first and then edit it because the alt
@@ -262,7 +262,7 @@ function testImageFieldSettings() {
     $this->assertFieldByName($field_name . '[0][title]', '', 'Title field displayed on article form.');
     // Verify that the attached image is being previewed using the 'medium'
     // style.
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $file = $node->{$field_name}->entity;
 
@@ -270,38 +270,38 @@ function testImageFieldSettings() {
     $this->assertTrue($this->cssSelect('img[width=40][height=20][class=image-style-medium][src="' . $url . '"]'));
 
     // Add alt/title fields to the image and verify that they are displayed.
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#uri' => $file->getFileUri(),
       '#alt' => $alt,
       '#title' => $this->randomMachineName(),
       '#width' => 40,
       '#height' => 20,
-    );
-    $edit = array(
+    ];
+    $edit = [
       $field_name . '[0][alt]' => $image['#alt'],
       $field_name . '[0][title]' => $image['#title'],
-    );
+    ];
     $this->drupalPostForm('node/' . $nid . '/edit', $edit, t('Save and keep published'));
     $default_output = str_replace("\n", NULL, $renderer->renderRoot($image));
     $this->assertRaw($default_output, 'Image displayed using user supplied alt and title attributes.');
 
     // Verify that alt/title longer than allowed results in a validation error.
     $test_size = 2000;
-    $edit = array(
+    $edit = [
       $field_name . '[0][alt]' => $this->randomMachineName($test_size),
       $field_name . '[0][title]' => $this->randomMachineName($test_size),
-    );
+    ];
     $this->drupalPostForm('node/' . $nid . '/edit', $edit, t('Save and keep published'));
     $schema = $field->getFieldStorageDefinition()->getSchema();
-    $this->assertRaw(t('Alternative text cannot be longer than %max characters but is currently %length characters long.', array(
+    $this->assertRaw(t('Alternative text cannot be longer than %max characters but is currently %length characters long.', [
       '%max' => $schema['columns']['alt']['length'],
       '%length' => $test_size,
-    )));
-    $this->assertRaw(t('Title cannot be longer than %max characters but is currently %length characters long.', array(
+    ]));
+    $this->assertRaw(t('Title cannot be longer than %max characters but is currently %length characters long.', [
       '%max' => $schema['columns']['title']['length'],
       '%length' => $test_size,
-    )));
+    ]));
 
     // Set cardinality to unlimited and add upload a second image.
     // The image widget is extending on the file widget, but the image field
@@ -310,20 +310,20 @@ function testImageFieldSettings() {
     // 1, so we need to make sure the file widget prevents these notices by
     // providing all settings, even if they are not used.
     // @see FileWidget::formMultipleElements().
-    $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.' . $field_name . '/storage', array('cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED), t('Save field settings'));
-    $edit = array(
+    $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.' . $field_name . '/storage', ['cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED], t('Save field settings'));
+    $edit = [
       'files[' . $field_name . '_1][]' => drupal_realpath($test_image->uri),
-    );
+    ];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
     // Add the required alt text.
     $this->drupalPostForm(NULL, [$field_name . '[1][alt]' => $alt], t('Save and keep published'));
-    $this->assertText(format_string('Article @title has been updated.', array('@title' => $node->getTitle())));
+    $this->assertText(format_string('Article @title has been updated.', ['@title' => $node->getTitle()]));
 
     // Assert ImageWidget::process() calls FieldWidget::process().
     $this->drupalGet('node/' . $node->id() . '/edit');
-    $edit = array(
+    $edit = [
       'files[' . $field_name . '_2][]' => drupal_realpath($test_image->uri),
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, $field_name . '_2_upload_button');
     $this->assertNoRaw('<input multiple type="file" id="edit-' . strtr($field_name, '_', '-') . '-2-upload" name="files[' . $field_name . '_2][]" size="22" class="js-form-file form-file">');
     $this->assertRaw('<input multiple type="file" id="edit-' . strtr($field_name, '_', '-') . '-3-upload" name="files[' . $field_name . '_3][]" size="22" class="js-form-file form-file">');
@@ -343,7 +343,7 @@ function testImageFieldDefaultImage() {
 
     // Create a new node, with no images and verify that no images are
     // displayed.
-    $node = $this->drupalCreateNode(array('type' => 'article'));
+    $node = $this->drupalCreateNode(['type' => 'article']);
     $this->drupalGet('node/' . $node->id());
     // Verify that no image is displayed on the page by checking for the class
     // that would be used on the image field.
@@ -355,12 +355,12 @@ function testImageFieldDefaultImage() {
     $images = $this->drupalGetTestFiles('image');
     $alt = $this->randomString(512);
     $title = $this->randomString(1024);
-    $edit = array(
+    $edit = [
       // Get the path of the 'image-test.png' file.
       'files[settings_default_image_uuid]' => drupal_realpath($images[0]->uri),
       'settings[default_image][alt]' => $alt,
       'settings[default_image][title]' => $title,
-    );
+    ];
     $this->drupalPostForm("admin/structure/types/manage/article/fields/node.article.$field_name/storage", $edit, t('Save field settings'));
     // Clear field definition cache so the new default image is detected.
     \Drupal::entityManager()->clearCachedFieldDefinitions();
@@ -368,14 +368,14 @@ function testImageFieldDefaultImage() {
     $default_image = $field_storage->getSetting('default_image');
     $file = \Drupal::entityManager()->loadEntityByUuid('file', $default_image['uuid']);
     $this->assertTrue($file->isPermanent(), 'The default image status is permanent.');
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#uri' => $file->getFileUri(),
       '#alt' => $alt,
       '#title' => $title,
       '#width' => 40,
       '#height' => 20,
-    );
+    ];
     $default_output = str_replace("\n", NULL, $renderer->renderRoot($image));
     $this->drupalGet('node/' . $node->id());
     $this->assertCacheTag($file->getCacheTags()[0]);
@@ -391,16 +391,16 @@ function testImageFieldDefaultImage() {
 
     // Upload the 'image-test.gif' file.
     $nid = $this->uploadNodeImage($images[2], $field_name, 'article', $alt);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
     $file = $node->{$field_name}->entity;
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#uri' => $file->getFileUri(),
       '#width' => 40,
       '#height' => 20,
       '#alt' => $alt,
-    );
+    ];
     $image_output = str_replace("\n", NULL, $renderer->renderRoot($image));
     $this->drupalGet('node/' . $nid);
     $this->assertCacheTag($file->getCacheTags()[0]);
@@ -410,9 +410,9 @@ function testImageFieldDefaultImage() {
     $this->assertRaw($image_output, 'User supplied image is displayed.');
 
     // Remove default image from the field and make sure it is no longer used.
-    $edit = array(
+    $edit = [
       'settings[default_image][uuid][fids]' => 0,
-    );
+    ];
     $this->drupalPostForm("admin/structure/types/manage/article/fields/node.article.$field_name/storage", $edit, t('Save field settings'));
     // Clear field definition cache so the new default image is detected.
     \Drupal::entityManager()->clearCachedFieldDefinitions();
@@ -422,14 +422,14 @@ function testImageFieldDefaultImage() {
     // Create an image field that uses the private:// scheme and test that the
     // default image works as expected.
     $private_field_name = strtolower($this->randomMachineName());
-    $this->createImageField($private_field_name, 'article', array('uri_scheme' => 'private'));
+    $this->createImageField($private_field_name, 'article', ['uri_scheme' => 'private']);
     // Add a default image to the new field.
-    $edit = array(
+    $edit = [
       // Get the path of the 'image-test.gif' file.
       'files[settings_default_image_uuid]' => drupal_realpath($images[2]->uri),
       'settings[default_image][alt]' => $alt,
       'settings[default_image][title]' => $title,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.' . $private_field_name . '/storage', $edit, t('Save field settings'));
     // Clear field definition cache so the new default image is detected.
     \Drupal::entityManager()->clearCachedFieldDefinitions();
@@ -441,15 +441,15 @@ function testImageFieldDefaultImage() {
     $this->assertTrue($file->isPermanent(), 'The default image status is permanent.');
     // Create a new node with no image attached and ensure that default private
     // image is displayed.
-    $node = $this->drupalCreateNode(array('type' => 'article'));
-    $image = array(
+    $node = $this->drupalCreateNode(['type' => 'article']);
+    $image = [
       '#theme' => 'image',
       '#uri' => $file->getFileUri(),
       '#alt' => $alt,
       '#title' => $title,
       '#width' => 40,
       '#height' => 20,
-    );
+    ];
     $default_output = str_replace("\n", NULL, $renderer->renderRoot($image));
     $this->drupalGet('node/' . $node->id());
     $this->assertCacheTag($file->getCacheTags()[0]);
diff --git a/core/modules/image/src/Tests/ImageFieldTestBase.php b/core/modules/image/src/Tests/ImageFieldTestBase.php
index c17f53a8b68eda6ddd0a91bebdb0a3387edc16be..ed452786462060e1030ddfac747444f2056e3919 100644
--- a/core/modules/image/src/Tests/ImageFieldTestBase.php
+++ b/core/modules/image/src/Tests/ImageFieldTestBase.php
@@ -33,7 +33,7 @@ abstract class ImageFieldTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'image', 'field_ui', 'image_module_test');
+  public static $modules = ['node', 'image', 'field_ui', 'image_module_test'];
 
   /**
    * An user with permissions to administer content types and image styles.
@@ -47,11 +47,11 @@ protected function setUp() {
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
 
-    $this->adminUser = $this->drupalCreateUser(array('access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer node fields', 'administer nodes', 'create article content', 'edit any article content', 'delete any article content', 'administer image styles', 'administer node display'));
+    $this->adminUser = $this->drupalCreateUser(['access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer node fields', 'administer nodes', 'create article content', 'edit any article content', 'delete any article content', 'administer image styles', 'administer node display']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -66,9 +66,9 @@ protected function setUp() {
    *   The type of node to create.
    */
   function previewNodeImage($image, $field_name, $type) {
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $edit['files[' . $field_name . '_0]'] = drupal_realpath($image->uri);
     $this->drupalPostForm('node/add/' . $type, $edit, t('Preview'));
   }
@@ -86,9 +86,9 @@ function previewNodeImage($image, $field_name, $type) {
    *   The alt text for the image. Use if the field settings require alt text.
    */
   function uploadNodeImage($image, $field_name, $type, $alt = '') {
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $edit['files[' . $field_name . '_0]'] = drupal_realpath($image->uri);
     $this->drupalPostForm('node/add/' . $type, $edit, t('Save and publish'));
     if ($alt) {
@@ -97,7 +97,7 @@ function uploadNodeImage($image, $field_name, $type, $alt = '') {
     }
 
     // Retrieve ID of the newly created node from the current URL.
-    $matches = array();
+    $matches = [];
     preg_match('/node\/([0-9]+)/', $this->getUrl(), $matches);
     return isset($matches[1]) ? $matches[1] : FALSE;
   }
diff --git a/core/modules/image/src/Tests/ImageFieldValidateTest.php b/core/modules/image/src/Tests/ImageFieldValidateTest.php
index 5f0bf213fae507104f1bcb394bd778d1cf3d4e32..4e8e0c1f1acca611ce9db51f145004e66ae8746d 100644
--- a/core/modules/image/src/Tests/ImageFieldValidateTest.php
+++ b/core/modules/image/src/Tests/ImageFieldValidateTest.php
@@ -87,14 +87,14 @@ function testResolution() {
    */
   function testRequiredAttributes() {
     $field_name = strtolower($this->randomMachineName());
-    $field_settings = array(
+    $field_settings = [
       'alt_field' => 1,
       'alt_field_required' => 1,
       'title_field' => 1,
       'title_field_required' => 1,
       'required' => 1,
-    );
-    $instance = $this->createImageField($field_name, 'article', array(), $field_settings);
+    ];
+    $instance = $this->createImageField($field_name, 'article', [], $field_settings);
     $images = $this->drupalGetTestFiles('image');
     // Let's just use the first image.
     $image = $images[0];
@@ -116,9 +116,9 @@ function testRequiredAttributes() {
     $instance->setSetting('title_field_required', 0);
     $instance->save();
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('node/add/article', $edit, t('Save and publish'));
 
     $this->assertNoText(t('Alternative text field is required.'));
@@ -129,9 +129,9 @@ function testRequiredAttributes() {
     $instance->setSetting('title_field_required', 1);
     $instance->save();
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('node/add/article', $edit, t('Save and publish'));
 
     $this->assertNoText(t('Alternative text field is required.'));
diff --git a/core/modules/image/src/Tests/ImageOnTranslatedEntityTest.php b/core/modules/image/src/Tests/ImageOnTranslatedEntityTest.php
index a8985ce4c77513ec722b322059d0b2430db27b65..e1f70d78a9b04a50805b102fa01f8b1117baee6b 100644
--- a/core/modules/image/src/Tests/ImageOnTranslatedEntityTest.php
+++ b/core/modules/image/src/Tests/ImageOnTranslatedEntityTest.php
@@ -14,7 +14,7 @@ class ImageOnTranslatedEntityTest extends ImageFieldTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language', 'content_translation', 'field_ui');
+  public static $modules = ['language', 'content_translation', 'field_ui'];
 
   /**
    * The name of the image field used in the test.
@@ -39,7 +39,7 @@ protected function setUp() {
     $this->createImageField($this->fieldName, 'basicpage', [], ['title_field' => 1]);
 
     // Create and log in user.
-    $permissions = array(
+    $permissions = [
       'access administration pages',
       'administer content translation',
       'administer content types',
@@ -50,16 +50,16 @@ protected function setUp() {
       'edit any basicpage content',
       'translate any entity',
       'delete any basicpage content',
-    );
+    ];
     $admin_user = $this->drupalCreateUser($permissions);
     $this->drupalLogin($admin_user);
 
     // Add a second and third language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'fr';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'nl';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
   }
@@ -69,7 +69,7 @@ protected function setUp() {
    */
   public function testSyncedImages() {
     // Enable translation for "Basic page" nodes.
-    $edit = array(
+    $edit = [
       'entity_types[node]' => 1,
       'settings[node][basicpage][translatable]' => 1,
       "settings[node][basicpage][fields][$this->fieldName]" => 1,
@@ -78,7 +78,7 @@ public function testSyncedImages() {
       // checkboxes on the form.
       "settings[node][basicpage][columns][$this->fieldName][alt]" => FALSE,
       "settings[node][basicpage][columns][$this->fieldName][title]" => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/content-language', $edit, 'Save configuration');
 
     // Verify that the image field on the "Basic basic" node type is
@@ -87,10 +87,10 @@ public function testSyncedImages() {
     $this->assertTrue($definitions[$this->fieldName]->isTranslatable(), 'Node image field is translatable.');
 
     // Create a default language node.
-    $default_language_node = $this->drupalCreateNode(array('type' => 'basicpage', 'title' => 'Lost in translation'));
+    $default_language_node = $this->drupalCreateNode(['type' => 'basicpage', 'title' => 'Lost in translation']);
 
     // Edit the node to upload a file.
-    $edit = array();
+    $edit = [];
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('image')[0]->uri);
     $this->drupalPostForm('node/' . $default_language_node->id() . '/edit', $edit, t('Save'));
@@ -99,10 +99,10 @@ public function testSyncedImages() {
     $first_fid = $this->getLastFileId();
 
     // Translate the node into French: remove the existing file.
-    $this->drupalPostForm('node/' . $default_language_node->id() . '/translations/add/en/fr', array(), t('Remove'));
+    $this->drupalPostForm('node/' . $default_language_node->id() . '/translations/add/en/fr', [], t('Remove'));
 
     // Upload a different file.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = 'Scarlett Johansson';
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('image')[1]->uri);
@@ -131,10 +131,10 @@ public function testSyncedImages() {
     $this->assertTrue($file->isPermanent());
 
     // Translate the node into dutch: remove the existing file.
-    $this->drupalPostForm('node/' . $default_language_node->id() . '/translations/add/en/nl', array(), t('Remove'));
+    $this->drupalPostForm('node/' . $default_language_node->id() . '/translations/add/en/nl', [], t('Remove'));
 
     // Upload a different file.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = 'Akiko Takeshita';
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('image')[2]->uri);
@@ -166,10 +166,10 @@ public function testSyncedImages() {
     $this->assertTrue($file->isPermanent());
 
     // Edit the second translation: remove the existing file.
-    $this->drupalPostForm('fr/node/' . $default_language_node->id() . '/edit', array(), t('Remove'));
+    $this->drupalPostForm('fr/node/' . $default_language_node->id() . '/edit', [], t('Remove'));
 
     // Upload a different file.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = 'Giovanni Ribisi';
     $name = 'files[' . $this->fieldName . '_0]';
     $edit[$name] = drupal_realpath($this->drupalGetTestFiles('image')[3]->uri);
@@ -194,7 +194,7 @@ public function testSyncedImages() {
     $this->assertTrue($file->isPermanent());
 
     // Delete the third translation.
-    $this->drupalPostForm('nl/node/' . $default_language_node->id() . '/delete', array(), t('Delete Dutch translation'));
+    $this->drupalPostForm('nl/node/' . $default_language_node->id() . '/delete', [], t('Delete Dutch translation'));
 
     \Drupal::entityTypeManager()->getStorage('file')->resetCache();
 
@@ -210,7 +210,7 @@ public function testSyncedImages() {
     $this->assertTrue($file->isTemporary());
 
     // Delete the all translations.
-    $this->drupalPostForm('node/' . $default_language_node->id() . '/delete', array(), t('Delete all translations'));
+    $this->drupalPostForm('node/' . $default_language_node->id() . '/delete', [], t('Delete all translations'));
 
     \Drupal::entityTypeManager()->getStorage('file')->resetCache();
 
diff --git a/core/modules/image/src/Tests/ImageStyleFlushTest.php b/core/modules/image/src/Tests/ImageStyleFlushTest.php
index 63c0d8093a825915226f60745eec8ed4f6aee713..ad837e88e41c295ee71f6bf6ba4e7aa8d72a99c2 100644
--- a/core/modules/image/src/Tests/ImageStyleFlushTest.php
+++ b/core/modules/image/src/Tests/ImageStyleFlushTest.php
@@ -47,29 +47,29 @@ function testFlush() {
     $style_name = strtolower($this->randomMachineName(10));
     $style_label = $this->randomString();
     $style_path = 'admin/config/media/image-styles/manage/' . $style_name;
-    $effect_edits = array(
-      'image_resize' => array(
+    $effect_edits = [
+      'image_resize' => [
         'data[width]' => 100,
         'data[height]' => 101,
-      ),
-      'image_scale' => array(
+      ],
+      'image_scale' => [
         'data[width]' => 110,
         'data[height]' => 111,
         'data[upscale]' => 1,
-      ),
-    );
+      ],
+    ];
 
     // Add style form.
-    $edit = array(
+    $edit = [
       'name' => $style_name,
       'label' => $style_label,
-    );
+    ];
     $this->drupalPostForm('admin/config/media/image-styles/add', $edit, t('Create new style'));
 
     // Add each sample effect to the style.
     foreach ($effect_edits as $effect => $edit) {
       // Add the effect.
-      $this->drupalPostForm($style_path, array('new' => $effect), t('Add'));
+      $this->drupalPostForm($style_path, ['new' => $effect], t('Add'));
       if (!empty($edit)) {
         $this->drupalPostForm(NULL, $edit, t('Add effect'));
       }
@@ -82,29 +82,29 @@ function testFlush() {
     $image_path = $this->createSampleImage($style, 'public');
     // Expecting to find 2 images, one is the sample.png image shown in
     // image style preview.
-    $this->assertEqual($this->getImageCount($style, 'public'), 2, format_string('Image style %style image %file successfully generated.', array('%style' => $style->label(), '%file' => $image_path)));
+    $this->assertEqual($this->getImageCount($style, 'public'), 2, format_string('Image style %style image %file successfully generated.', ['%style' => $style->label(), '%file' => $image_path]));
 
     // Create an image for the 'private' wrapper.
     $image_path = $this->createSampleImage($style, 'private');
-    $this->assertEqual($this->getImageCount($style, 'private'), 1, format_string('Image style %style image %file successfully generated.', array('%style' => $style->label(), '%file' => $image_path)));
+    $this->assertEqual($this->getImageCount($style, 'private'), 1, format_string('Image style %style image %file successfully generated.', ['%style' => $style->label(), '%file' => $image_path]));
 
     // Remove the 'image_scale' effect and updates the style, which in turn
     // forces an image style flush.
     $style_path = 'admin/config/media/image-styles/manage/' . $style->id();
-    $uuids = array();
+    $uuids = [];
     foreach ($style->getEffects() as $uuid => $effect) {
       $uuids[$effect->getPluginId()] = $uuid;
     }
-    $this->drupalPostForm($style_path . '/effects/' . $uuids['image_scale'] . '/delete', array(), t('Delete'));
+    $this->drupalPostForm($style_path . '/effects/' . $uuids['image_scale'] . '/delete', [], t('Delete'));
     $this->assertResponse(200);
-    $this->drupalPostForm($style_path, array(), t('Update style'));
+    $this->drupalPostForm($style_path, [], t('Update style'));
     $this->assertResponse(200);
 
     // Post flush, expected 1 image in the 'public' wrapper (sample.png).
-    $this->assertEqual($this->getImageCount($style, 'public'), 1, format_string('Image style %style flushed correctly for %wrapper wrapper.', array('%style' => $style->label(), '%wrapper' => 'public')));
+    $this->assertEqual($this->getImageCount($style, 'public'), 1, format_string('Image style %style flushed correctly for %wrapper wrapper.', ['%style' => $style->label(), '%wrapper' => 'public']));
 
     // Post flush, expected no image in the 'private' wrapper.
-    $this->assertEqual($this->getImageCount($style, 'private'), 0, format_string('Image style %style flushed correctly for %wrapper wrapper.', array('%style' => $style->label(), '%wrapper' => 'private')));
+    $this->assertEqual($this->getImageCount($style, 'private'), 0, format_string('Image style %style flushed correctly for %wrapper wrapper.', ['%style' => $style->label(), '%wrapper' => 'private']));
   }
 
 }
diff --git a/core/modules/image/src/Tests/ImageStylesPathAndUrlTest.php b/core/modules/image/src/Tests/ImageStylesPathAndUrlTest.php
index d03bc3bc998f58c59e72352c7aab9774a5b28509..28a78cda79af89ac58650244c8bfdaac13d30714 100644
--- a/core/modules/image/src/Tests/ImageStylesPathAndUrlTest.php
+++ b/core/modules/image/src/Tests/ImageStylesPathAndUrlTest.php
@@ -17,7 +17,7 @@ class ImageStylesPathAndUrlTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('image', 'image_module_test');
+  public static $modules = ['image', 'image_module_test'];
 
   /**
    * @var \Drupal\image\ImageStyleInterface
@@ -27,7 +27,7 @@ class ImageStylesPathAndUrlTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->style = ImageStyle::create(array('name' => 'style_foo', 'label' => $this->randomString()));
+    $this->style = ImageStyle::create(['name' => 'style_foo', 'label' => $this->randomString()]);
     $this->style->save();
   }
 
diff --git a/core/modules/image/src/Tests/ImageThemeFunctionTest.php b/core/modules/image/src/Tests/ImageThemeFunctionTest.php
index 52cf6c6e5df687fedecafff592934864a0079055..b5b42ff66242c18be90afac8a0777f2624e4590b 100644
--- a/core/modules/image/src/Tests/ImageThemeFunctionTest.php
+++ b/core/modules/image/src/Tests/ImageThemeFunctionTest.php
@@ -23,7 +23,7 @@ class ImageThemeFunctionTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('image', 'entity_test');
+  public static $modules = ['image', 'entity_test'];
 
   /**
    * Created file entity.
@@ -40,12 +40,12 @@ class ImageThemeFunctionTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'image_test',
       'type' => 'image',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'image_test',
@@ -72,7 +72,7 @@ function testImageFormatterTheme() {
     $original_uri = file_unmanaged_copy($file->uri, 'public://', FILE_EXISTS_RENAME);
 
     // Create a style.
-    $style = ImageStyle::create(array('name' => 'test', 'label' => 'Test'));
+    $style = ImageStyle::create(['name' => 'test', 'label' => 'Test']);
     $style->save();
     $url = file_url_transform_relative($style->buildUrl($original_uri));
 
@@ -86,17 +86,17 @@ function testImageFormatterTheme() {
 
     // Create the base element that we'll use in the tests below.
     $path = $this->randomMachineName();
-    $base_element = array(
+    $base_element = [
       '#theme' => 'image_formatter',
       '#image_style' => 'test',
       '#item' => $entity->image_test,
       '#url' => Url::fromUri('base:' . $path),
-    );
+    ];
 
     // Test using theme_image_formatter() with a NULL value for the alt option.
     $element = $base_element;
     $this->setRawContent($renderer->renderRoot($element));
-    $elements = $this->xpath('//a[@href=:path]/img[@class="image-style-test" and @src=:url and @width=:width and @height=:height]', array(':path' => base_path() . $path, ':url' => $url, ':width' => $image->getWidth(), ':height' => $image->getHeight()));
+    $elements = $this->xpath('//a[@href=:path]/img[@class="image-style-test" and @src=:url and @width=:width and @height=:height]', [':path' => base_path() . $path, ':url' => $url, ':width' => $image->getWidth(), ':height' => $image->getHeight()]);
     $this->assertEqual(count($elements), 1, 'theme_image_formatter() correctly renders with a NULL value for the alt option.');
 
     // Test using theme_image_formatter() without an image title, alt text, or
@@ -104,7 +104,7 @@ function testImageFormatterTheme() {
     $element = $base_element;
     $element['#item']->alt = '';
     $this->setRawContent($renderer->renderRoot($element));
-    $elements = $this->xpath('//a[@href=:path]/img[@class="image-style-test" and @src=:url and @width=:width and @height=:height and @alt=""]', array(':path' => base_path() . $path, ':url' => $url, ':width' => $image->getWidth(), ':height' => $image->getHeight()));
+    $elements = $this->xpath('//a[@href=:path]/img[@class="image-style-test" and @src=:url and @width=:width and @height=:height and @alt=""]', [':path' => base_path() . $path, ':url' => $url, ':width' => $image->getWidth(), ':height' => $image->getHeight()]);
     $this->assertEqual(count($elements), 1, 'theme_image_formatter() correctly renders without title, alt, or path options.');
 
     // Link the image to a fragment on the page, and not a full URL.
@@ -112,12 +112,12 @@ function testImageFormatterTheme() {
     $element = $base_element;
     $element['#url'] = Url::fromRoute('<none>', [], ['fragment' => $fragment]);
     $this->setRawContent($renderer->renderRoot($element));
-    $elements = $this->xpath('//a[@href=:fragment]/img[@class="image-style-test" and @src=:url and @width=:width and @height=:height and @alt=""]', array(
+    $elements = $this->xpath('//a[@href=:fragment]/img[@class="image-style-test" and @src=:url and @width=:width and @height=:height and @alt=""]', [
       ':fragment' => '#' . $fragment,
       ':url' => $url,
       ':width' => $image->getWidth(),
       ':height' => $image->getHeight()
-    ));
+    ]);
     $this->assertEqual(count($elements), 1, 'theme_image_formatter() correctly renders a link fragment.');
   }
 
@@ -134,27 +134,27 @@ function testImageStyleTheme() {
     $original_uri = file_unmanaged_copy($file->uri, 'public://', FILE_EXISTS_RENAME);
 
     // Create a style.
-    $style = ImageStyle::create(array('name' => 'image_test', 'label' => 'Test'));
+    $style = ImageStyle::create(['name' => 'image_test', 'label' => 'Test']);
     $style->save();
     $url = file_url_transform_relative($style->buildUrl($original_uri));
 
     // Create the base element that we'll use in the tests below.
-    $base_element = array(
+    $base_element = [
       '#theme' => 'image_style',
       '#style_name' => 'image_test',
       '#uri' => $original_uri,
-    );
+    ];
 
     $element = $base_element;
     $this->setRawContent($renderer->renderRoot($element));
-    $elements = $this->xpath('//img[@class="image-style-image-test" and @src=:url and @alt=""]', array(':url' => $url));
+    $elements = $this->xpath('//img[@class="image-style-image-test" and @src=:url and @alt=""]', [':url' => $url]);
     $this->assertEqual(count($elements), 1, 'theme_image_style() renders an image correctly.');
 
     // Test using theme_image_style() with a NULL value for the alt option.
     $element = $base_element;
     $element['#alt'] = NULL;
     $this->setRawContent($renderer->renderRoot($element));
-    $elements = $this->xpath('//img[@class="image-style-image-test" and @src=:url]', array(':url' => $url));
+    $elements = $this->xpath('//img[@class="image-style-image-test" and @src=:url]', [':url' => $url]);
     $this->assertEqual(count($elements), 1, 'theme_image_style() renders an image correctly with a NULL value for the alt option.');
   }
 
@@ -166,55 +166,55 @@ function testImageAltFunctionality() {
     $renderer = $this->container->get('renderer');
 
     // Test using alt directly with alt attribute.
-    $image_with_alt_property = array(
+    $image_with_alt_property = [
       '#theme' => 'image',
       '#uri' => '/core/themes/bartik/logo.svg',
       '#alt' => 'Regular alt',
       '#title' => 'Test title',
       '#width' => '50%',
       '#height' => '50%',
-      '#attributes' => array('class' => 'image-with-regular-alt', 'id' => 'my-img'),
-    );
+      '#attributes' => ['class' => 'image-with-regular-alt', 'id' => 'my-img'],
+    ];
 
     $this->setRawContent($renderer->renderRoot($image_with_alt_property));
-    $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', array(":class" => "image-with-regular-alt", ":alt" => "Regular alt"));
+    $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', [":class" => "image-with-regular-alt", ":alt" => "Regular alt"]);
     $this->assertEqual(count($elements), 1, 'Regular alt displays correctly');
 
     // Test using alt attribute inside attributes.
-    $image_with_alt_attribute_alt_attribute = array(
+    $image_with_alt_attribute_alt_attribute = [
       '#theme' => 'image',
       '#uri' => '/core/themes/bartik/logo.svg',
       '#width' => '50%',
       '#height' => '50%',
-      '#attributes' => array(
+      '#attributes' => [
         'class' => 'image-with-attribute-alt',
         'id' => 'my-img',
         'title' => 'New test title',
         'alt' => 'Attribute alt',
-      ),
-    );
+      ],
+    ];
 
     $this->setRawContent($renderer->renderRoot($image_with_alt_attribute_alt_attribute));
-    $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', array(":class" => "image-with-attribute-alt", ":alt" => "Attribute alt"));
+    $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', [":class" => "image-with-attribute-alt", ":alt" => "Attribute alt"]);
     $this->assertEqual(count($elements), 1, 'Attribute alt displays correctly');
 
     // Test using alt attribute as property and inside attributes.
-    $image_with_alt_attribute_both = array(
+    $image_with_alt_attribute_both = [
       '#theme' => 'image',
       '#uri' => '/core/themes/bartik/logo.svg',
       '#width' => '50%',
       '#height' => '50%',
       '#alt' => 'Kitten sustainable',
-      '#attributes' => array(
+      '#attributes' => [
         'class' => 'image-with-attribute-alt',
         'id' => 'my-img',
         'title' => 'New test title',
         'alt' => 'Attribute alt',
-      ),
-    );
+      ],
+    ];
 
     $this->setRawContent($renderer->renderRoot($image_with_alt_attribute_both));
-    $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', array(":class" => "image-with-attribute-alt", ":alt" => "Attribute alt"));
+    $elements = $this->xpath('//img[contains(@class, class) and contains(@alt, :alt)]', [":class" => "image-with-attribute-alt", ":alt" => "Attribute alt"]);
     $this->assertEqual(count($elements), 1, 'Attribute alt overrides alt property if both set.');
   }
 
diff --git a/core/modules/image/src/Tests/Views/RelationshipUserImageDataTest.php b/core/modules/image/src/Tests/Views/RelationshipUserImageDataTest.php
index f9381d4039b9238b492a130b86a9c2f432f0080b..55cecc0fc09d935b55cc4b6398e6b2e7823e6cac 100644
--- a/core/modules/image/src/Tests/Views/RelationshipUserImageDataTest.php
+++ b/core/modules/image/src/Tests/Views/RelationshipUserImageDataTest.php
@@ -21,25 +21,25 @@ class RelationshipUserImageDataTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('image', 'image_test_views', 'user');
+  public static $modules = ['image', 'image_test_views', 'user'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_image_user_image_data');
+  public static $testViews = ['test_image_user_image_data'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create the user profile field and instance.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'user',
       'field_name' => 'user_picture',
       'type' => 'image',
       'translatable' => '0',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'label' => 'User Picture',
       'description' => '',
@@ -49,7 +49,7 @@ protected function setUp() {
       'required' => 0,
     ])->save();
 
-    ViewTestData::createTestViews(get_class($this), array('image_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['image_test_views']);
   }
 
   /**
@@ -84,12 +84,12 @@ public function testViewsHandlerRelationshipUserImageData() {
     ];
     $this->assertIdentical($expected, $view->getDependencies());
     $this->executeView($view);
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'file_managed_user__user_picture_fid' => '2',
-      ),
-    );
-    $column_map = array('file_managed_user__user_picture_fid' => 'file_managed_user__user_picture_fid');
+      ],
+    ];
+    $column_map = ['file_managed_user__user_picture_fid' => 'file_managed_user__user_picture_fid'];
     $this->assertIdenticalResultset($view, $expected_result, $column_map);
   }
 
diff --git a/core/modules/image/tests/modules/image_module_test/image_module_test.module b/core/modules/image/tests/modules/image_module_test/image_module_test.module
index df713753568391338ebb8c75101e69bc6a29e8b9..20c515e9dad5178382e9b62fd56f0a62310b09eb 100644
--- a/core/modules/image/tests/modules/image_module_test/image_module_test.module
+++ b/core/modules/image/tests/modules/image_module_test/image_module_test.module
@@ -10,7 +10,7 @@
 function image_module_test_file_download($uri) {
   $default_uri = \Drupal::state()->get('image.test_file_download') ?: FALSE;
   if ($default_uri == $uri) {
-    return array('X-Image-Owned-By' => 'image_module_test');
+    return ['X-Image-Owned-By' => 'image_module_test'];
   }
 }
 
diff --git a/core/modules/image/tests/src/Functional/ImageEffectsTest.php b/core/modules/image/tests/src/Functional/ImageEffectsTest.php
index 17c343b12802ec324492d6fa515713bc6923e73a..6e719d834bf35783f292baf46feb57d2f59901e8 100644
--- a/core/modules/image/tests/src/Functional/ImageEffectsTest.php
+++ b/core/modules/image/tests/src/Functional/ImageEffectsTest.php
@@ -17,7 +17,7 @@ class ImageEffectsTest extends ToolkitTestBase {
    *
    * @var array
    */
-  public static $modules = array('image', 'image_test', 'image_module_test');
+  public static $modules = ['image', 'image_test', 'image_module_test'];
 
   /**
    * The image effect manager.
@@ -35,11 +35,11 @@ protected function setUp() {
    * Test the image_resize_effect() function.
    */
   function testResizeEffect() {
-    $this->assertImageEffect('image_resize', array(
+    $this->assertImageEffect('image_resize', [
       'width' => 1,
       'height' => 2,
-    ));
-    $this->assertToolkitOperationsCalled(array('resize'));
+    ]);
+    $this->assertToolkitOperationsCalled(['resize']);
 
     // Check the parameters.
     $calls = $this->imageTestGetAllCalls();
@@ -52,11 +52,11 @@ function testResizeEffect() {
    */
   function testScaleEffect() {
     // @todo: need to test upscaling.
-    $this->assertImageEffect('image_scale', array(
+    $this->assertImageEffect('image_scale', [
       'width' => 10,
       'height' => 10,
-    ));
-    $this->assertToolkitOperationsCalled(array('scale'));
+    ]);
+    $this->assertToolkitOperationsCalled(['scale']);
 
     // Check the parameters.
     $calls = $this->imageTestGetAllCalls();
@@ -69,12 +69,12 @@ function testScaleEffect() {
    */
   function testCropEffect() {
     // @todo should test the keyword offsets.
-    $this->assertImageEffect('image_crop', array(
+    $this->assertImageEffect('image_crop', [
       'anchor' => 'top-1',
       'width' => 3,
       'height' => 4,
-    ));
-    $this->assertToolkitOperationsCalled(array('crop'));
+    ]);
+    $this->assertToolkitOperationsCalled(['crop']);
 
     // Check the parameters.
     $calls = $this->imageTestGetAllCalls();
@@ -89,10 +89,10 @@ function testCropEffect() {
    */
   function testConvertEffect() {
     // Test jpeg.
-    $this->assertImageEffect('image_convert', array(
+    $this->assertImageEffect('image_convert', [
       'extension' => 'jpeg',
-    ));
-    $this->assertToolkitOperationsCalled(array('convert'));
+    ]);
+    $this->assertToolkitOperationsCalled(['convert']);
 
     // Check the parameters.
     $calls = $this->imageTestGetAllCalls();
@@ -103,11 +103,11 @@ function testConvertEffect() {
    * Test the image_scale_and_crop_effect() function.
    */
   function testScaleAndCropEffect() {
-    $this->assertImageEffect('image_scale_and_crop', array(
+    $this->assertImageEffect('image_scale_and_crop', [
       'width' => 5,
       'height' => 10,
-    ));
-    $this->assertToolkitOperationsCalled(array('scale_and_crop'));
+    ]);
+    $this->assertToolkitOperationsCalled(['scale_and_crop']);
 
     // Check the parameters.
     $calls = $this->imageTestGetAllCalls();
@@ -119,8 +119,8 @@ function testScaleAndCropEffect() {
    * Test the image_desaturate_effect() function.
    */
   function testDesaturateEffect() {
-    $this->assertImageEffect('image_desaturate', array());
-    $this->assertToolkitOperationsCalled(array('desaturate'));
+    $this->assertImageEffect('image_desaturate', []);
+    $this->assertToolkitOperationsCalled(['desaturate']);
 
     // Check the parameters.
     $calls = $this->imageTestGetAllCalls();
@@ -132,11 +132,11 @@ function testDesaturateEffect() {
    */
   function testRotateEffect() {
     // @todo: need to test with 'random' => TRUE
-    $this->assertImageEffect('image_rotate', array(
+    $this->assertImageEffect('image_rotate', [
       'degrees' => 90,
       'bgcolor' => '#fff',
-    ));
-    $this->assertToolkitOperationsCalled(array('rotate'));
+    ]);
+    $this->assertToolkitOperationsCalled(['rotate']);
 
     // Check the parameters.
     $calls = $this->imageTestGetAllCalls();
@@ -195,7 +195,7 @@ public function testEffectFormValidationErrors() {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertImageEffect($effect_name, array $data) {
-    $effect = $this->manager->createInstance($effect_name, array('data' => $data));
+    $effect = $this->manager->createInstance($effect_name, ['data' => $data]);
     return $this->assertTrue($effect->applyEffect($this->image), 'Function returned the expected value.');
   }
 
diff --git a/core/modules/image/tests/src/Functional/ImageFieldTestBase.php b/core/modules/image/tests/src/Functional/ImageFieldTestBase.php
index dfbc76ea876a16d520dcd0c93784c7b76b9add5b..0764954b33ed3d89fc27ced74583464ba472bb41 100644
--- a/core/modules/image/tests/src/Functional/ImageFieldTestBase.php
+++ b/core/modules/image/tests/src/Functional/ImageFieldTestBase.php
@@ -30,7 +30,7 @@ abstract class ImageFieldTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'image', 'field_ui', 'image_module_test');
+  public static $modules = ['node', 'image', 'field_ui', 'image_module_test'];
 
   /**
    * An user with permissions to administer content types and image styles.
@@ -44,11 +44,11 @@ protected function setUp() {
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
 
-    $this->adminUser = $this->drupalCreateUser(array('access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer node fields', 'administer nodes', 'create article content', 'edit any article content', 'delete any article content', 'administer image styles', 'administer node display'));
+    $this->adminUser = $this->drupalCreateUser(['access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer node fields', 'administer nodes', 'create article content', 'edit any article content', 'delete any article content', 'administer image styles', 'administer node display']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -63,9 +63,9 @@ protected function setUp() {
    *   The type of node to create.
    */
   function previewNodeImage($image, $field_name, $type) {
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $edit['files[' . $field_name . '_0]'] = drupal_realpath($image->uri);
     $this->drupalPostForm('node/add/' . $type, $edit, t('Preview'));
   }
@@ -83,9 +83,9 @@ function previewNodeImage($image, $field_name, $type) {
    *   The alt text for the image. Use if the field settings require alt text.
    */
   function uploadNodeImage($image, $field_name, $type, $alt = '') {
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
-    );
+    ];
     $edit['files[' . $field_name . '_0]'] = drupal_realpath($image->uri);
     $this->drupalPostForm('node/add/' . $type, $edit, t('Save and publish'));
     if ($alt) {
@@ -94,7 +94,7 @@ function uploadNodeImage($image, $field_name, $type, $alt = '') {
     }
 
     // Retrieve ID of the newly created node from the current URL.
-    $matches = array();
+    $matches = [];
     preg_match('/node\/([0-9]+)/', $this->getUrl(), $matches);
     return isset($matches[1]) ? $matches[1] : FALSE;
   }
diff --git a/core/modules/image/tests/src/Functional/ImageFieldWidgetTest.php b/core/modules/image/tests/src/Functional/ImageFieldWidgetTest.php
index 74743db49eb1394267881beeeaf0c719f5a18477..7c3b94d494bc4b074133c422b6e1159be7251e30 100644
--- a/core/modules/image/tests/src/Functional/ImageFieldWidgetTest.php
+++ b/core/modules/image/tests/src/Functional/ImageFieldWidgetTest.php
@@ -17,12 +17,12 @@ public function testWidgetElement() {
     $field_name = strtolower($this->randomMachineName());
     $min_resolution = 50;
     $max_resolution = 100;
-    $field_settings = array(
+    $field_settings = [
       'max_resolution' => $max_resolution . 'x' . $max_resolution,
       'min_resolution' => $min_resolution . 'x' . $min_resolution,
       'alt_field' => 0,
-    );
-    $this->createImageField($field_name, 'article', array(), $field_settings, array(), array(), 'Image test on [site:name]');
+    ];
+    $this->createImageField($field_name, 'article', [], $field_settings, [], [], 'Image test on [site:name]');
     $this->drupalGet('node/add/article');
     $this->assertNotEqual(0, count($this->xpath('//div[contains(@class, "field--widget-image-image")]')), 'Image field widget found on add/node page', 'Browser');
     $this->assertNotEqual(0, count($this->xpath('//input[contains(@accept, "image/*")]')), 'Image field widget limits accepted files.', 'Browser');
diff --git a/core/modules/image/tests/src/Kernel/ImageFieldCreationTrait.php b/core/modules/image/tests/src/Kernel/ImageFieldCreationTrait.php
index a8fe5895f59e6fa0ae9a1067d0309d9eae7fa683..851b424bfb60efd6aacf081a3d0a775021e27526 100644
--- a/core/modules/image/tests/src/Kernel/ImageFieldCreationTrait.php
+++ b/core/modules/image/tests/src/Kernel/ImageFieldCreationTrait.php
@@ -30,14 +30,14 @@ trait ImageFieldCreationTrait {
    * @param string $description
    *   (optional) A description for the field. Defaults to ''.
    */
-  protected function createImageField($name, $type_name, $storage_settings = array(), $field_settings = array(), $widget_settings = array(), $formatter_settings = array(), $description = '') {
-    FieldStorageConfig::create(array(
+  protected function createImageField($name, $type_name, $storage_settings = [], $field_settings = [], $widget_settings = [], $formatter_settings = [], $description = '') {
+    FieldStorageConfig::create([
       'field_name' => $name,
       'entity_type' => 'node',
       'type' => 'image',
       'settings' => $storage_settings,
       'cardinality' => !empty($storage_settings['cardinality']) ? $storage_settings['cardinality'] : 1,
-    ))->save();
+    ])->save();
 
     $field_config = FieldConfig::create([
       'field_name' => $name,
@@ -51,17 +51,17 @@ protected function createImageField($name, $type_name, $storage_settings = array
     $field_config->save();
 
     entity_get_form_display('node', $type_name, 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'type' => 'image_image',
         'settings' => $widget_settings,
-      ))
+      ])
       ->save();
 
     entity_get_display('node', $type_name, 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'type' => 'image',
         'settings' => $formatter_settings,
-      ))
+      ])
       ->save();
 
     return $field_config;
diff --git a/core/modules/image/tests/src/Kernel/ImageFormatterTest.php b/core/modules/image/tests/src/Kernel/ImageFormatterTest.php
index d1b132eccb954ee388a3411ab5217bf9a7a01e77..cd8a45b3e93d63ea4b81cf22fc88b77e1006cfcb 100644
--- a/core/modules/image/tests/src/Kernel/ImageFormatterTest.php
+++ b/core/modules/image/tests/src/Kernel/ImageFormatterTest.php
@@ -21,7 +21,7 @@ class ImageFormatterTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('file', 'image');
+  public static $modules = ['file', 'image'];
 
   /**
    * @var string
@@ -52,18 +52,18 @@ protected function setUp() {
     $this->installConfig(['field']);
     $this->installEntitySchema('entity_test');
     $this->installEntitySchema('file');
-    $this->installSchema('file', array('file_usage'));
+    $this->installSchema('file', ['file_usage']);
 
     $this->entityType = 'entity_test';
     $this->bundle = $this->entityType;
     $this->fieldName = Unicode::strtolower($this->randomMachineName());
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => $this->entityType,
       'field_name' => $this->fieldName,
       'type' => 'image',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => $this->entityType,
       'field_name' => $this->fieldName,
diff --git a/core/modules/image/tests/src/Kernel/ImageItemTest.php b/core/modules/image/tests/src/Kernel/ImageItemTest.php
index dea453469f8efba36e1bf4f5804004702c9c3dcd..f7a130545085d8365fe3bf30643e2c195f1d4def 100644
--- a/core/modules/image/tests/src/Kernel/ImageItemTest.php
+++ b/core/modules/image/tests/src/Kernel/ImageItemTest.php
@@ -23,7 +23,7 @@ class ImageItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('file', 'image');
+  public static $modules = ['file', 'image'];
 
   /**
    * Created file entity.
@@ -41,14 +41,14 @@ protected function setUp() {
     parent::setUp();
 
     $this->installEntitySchema('file');
-    $this->installSchema('file', array('file_usage'));
+    $this->installSchema('file', ['file_usage']);
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'image_test',
       'type' => 'image',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'image_test',
@@ -114,11 +114,11 @@ public function testImageItem() {
 
     // Delete the image and try to save the entity again.
     $this->image->delete();
-    $entity = EntityTest::create(array('mame' => $this->randomMachineName()));
+    $entity = EntityTest::create(['mame' => $this->randomMachineName()]);
     $entity->save();
 
     // Test image item properties.
-    $expected = array('target_id', 'entity', 'alt', 'title', 'width', 'height');
+    $expected = ['target_id', 'entity', 'alt', 'title', 'width', 'height'];
     $properties = $entity->getFieldDefinition('image_test')->getFieldStorageDefinition()->getPropertyDefinitions();
     $this->assertEqual(array_keys($properties), $expected);
 
diff --git a/core/modules/image/tests/src/Kernel/Migrate/d6/MigrateImageCacheTest.php b/core/modules/image/tests/src/Kernel/Migrate/d6/MigrateImageCacheTest.php
index 10cc68df0a8c5d8d36338f92cf7e3d72b289b85c..d9381407d90eaf27b3dc32efbc5e20bfac41a85c 100644
--- a/core/modules/image/tests/src/Kernel/Migrate/d6/MigrateImageCacheTest.php
+++ b/core/modules/image/tests/src/Kernel/Migrate/d6/MigrateImageCacheTest.php
@@ -28,9 +28,9 @@ protected function setUp() {
    */
   public function testMissingTable() {
     $this->sourceDatabase->update('system')
-      ->fields(array(
+      ->fields([
         'status' => 0,
-      ))
+      ])
       ->condition('name', 'imagecache')
       ->condition('type', 'module')
       ->execute();
diff --git a/core/modules/image/tests/src/Kernel/Migrate/d7/MigrateImageStylesTest.php b/core/modules/image/tests/src/Kernel/Migrate/d7/MigrateImageStylesTest.php
index 0903218e02d6d70ef85921ceaa9854604f644522..534a4120c4b5760a21d416b17d2d3232026dfcfd 100644
--- a/core/modules/image/tests/src/Kernel/Migrate/d7/MigrateImageStylesTest.php
+++ b/core/modules/image/tests/src/Kernel/Migrate/d7/MigrateImageStylesTest.php
@@ -17,7 +17,7 @@ class MigrateImageStylesTest extends MigrateDrupal7TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('image');
+  public static $modules = ['image'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d7/ImageStylesTest.php b/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d7/ImageStylesTest.php
index bb91de8a939b40db7248c6305311cc930acdb2a5..55251d1fb2dcba23d1326432b7a6c413abd39e3c 100644
--- a/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d7/ImageStylesTest.php
+++ b/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d7/ImageStylesTest.php
@@ -38,7 +38,7 @@ public function providerSource() {
         'isid' => 1,
         'weight' => 1,
         'name' => 'image_desaturate',
-        'data' => serialize(array()),
+        'data' => serialize([]),
       ],
     ];
 
diff --git a/core/modules/image/tests/src/Kernel/Views/ImageViewsDataTest.php b/core/modules/image/tests/src/Kernel/Views/ImageViewsDataTest.php
index c2f8fd8e7231b8ee5cc9125c784cab35823be6a2..a324d5ead346947c54703185ad7115f318b347af 100644
--- a/core/modules/image/tests/src/Kernel/Views/ImageViewsDataTest.php
+++ b/core/modules/image/tests/src/Kernel/Views/ImageViewsDataTest.php
@@ -19,7 +19,7 @@ class ImageViewsDataTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('image', 'file', 'views', 'entity_test', 'user', 'field');
+  public static $modules = ['image', 'file', 'views', 'entity_test', 'user', 'field'];
 
   /**
    * Tests views data generated for image field relationship.
@@ -29,16 +29,16 @@ class ImageViewsDataTest extends ViewsKernelTestBase {
    */
   public function testRelationshipViewsData() {
     // Create image field to entity_test.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_base_image',
       'type' => 'image',
-    ))->save();
-    FieldConfig::create(array(
+    ])->save();
+    FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_base_image',
       'bundle' => 'entity_test',
-    ))->save();
+    ])->save();
     // Check the generated views data.
     $views_data = Views::viewsData()->get('entity_test__field_base_image');
     $relationship = $views_data['field_base_image_target_id']['relationship'];
@@ -59,16 +59,16 @@ public function testRelationshipViewsData() {
     $this->assertEqual($relationship['join_extra'][0], ['field' => 'deleted', 'value' => 0, 'numeric' => TRUE]);
 
     // Create image field to entity_test_mul.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test_mul',
       'field_name' => 'field_data_image',
       'type' => 'image',
-    ))->save();
-    FieldConfig::create(array(
+    ])->save();
+    FieldConfig::create([
       'entity_type' => 'entity_test_mul',
       'field_name' => 'field_data_image',
       'bundle' => 'entity_test_mul',
-    ))->save();
+    ])->save();
     // Check the generated views data.
     $views_data = Views::viewsData()->get('entity_test_mul__field_data_image');
     $relationship = $views_data['field_data_image_target_id']['relationship'];
diff --git a/core/modules/image/tests/src/Unit/ImageStyleTest.php b/core/modules/image/tests/src/Unit/ImageStyleTest.php
index 26dd2258a0198921246d048e5e1f107c90412f44..bc954b3cc46be41976de4383868e9564cb15629d 100644
--- a/core/modules/image/tests/src/Unit/ImageStyleTest.php
+++ b/core/modules/image/tests/src/Unit/ImageStyleTest.php
@@ -44,7 +44,7 @@ class ImageStyleTest extends UnitTestCase {
    * @return \Drupal\image\ImageStyleInterface
    *   The mocked image style.
    */
-  protected function getImageStyleMock($image_effect_id, $image_effect, $stubs = array()) {
+  protected function getImageStyleMock($image_effect_id, $image_effect, $stubs = []) {
     $effectManager = $this->getMockBuilder('\Drupal\image\ImageEffectManager')
       ->disableOriginalConstructor()
       ->getMock();
@@ -52,17 +52,17 @@ protected function getImageStyleMock($image_effect_id, $image_effect, $stubs = a
       ->method('createInstance')
       ->with($image_effect_id)
       ->will($this->returnValue($image_effect));
-    $default_stubs = array(
+    $default_stubs = [
       'getImageEffectPluginManager',
       'fileUriScheme',
       'fileUriTarget',
       'fileDefaultScheme',
-    );
+    ];
     $image_style = $this->getMockBuilder('\Drupal\image\Entity\ImageStyle')
-      ->setConstructorArgs(array(
-        array('effects' => array($image_effect_id => array('id' => $image_effect_id))),
+      ->setConstructorArgs([
+        ['effects' => [$image_effect_id => ['id' => $image_effect_id]]],
         $this->entityTypeId,
-      ))
+      ])
       ->setMethods(array_merge($default_stubs, $stubs))
       ->getMock();
 
@@ -71,13 +71,13 @@ protected function getImageStyleMock($image_effect_id, $image_effect, $stubs = a
       ->will($this->returnValue($effectManager));
     $image_style->expects($this->any())
       ->method('fileUriScheme')
-      ->will($this->returnCallback(array($this, 'fileUriScheme')));
+      ->will($this->returnCallback([$this, 'fileUriScheme']));
     $image_style->expects($this->any())
       ->method('fileUriTarget')
-      ->will($this->returnCallback(array($this, 'fileUriTarget')));
+      ->will($this->returnCallback([$this, 'fileUriTarget']));
     $image_style->expects($this->any())
       ->method('fileDefaultScheme')
-      ->will($this->returnCallback(array($this, 'fileDefaultScheme')));
+      ->will($this->returnCallback([$this, 'fileDefaultScheme']));
 
     return $image_style;
   }
@@ -106,7 +106,7 @@ public function testGetDerivativeExtension() {
     $image_effect_id = $this->randomMachineName();
     $logger = $this->getMockBuilder('\Psr\Log\LoggerInterface')->getMock();
     $image_effect = $this->getMockBuilder('\Drupal\image\ImageEffectBase')
-      ->setConstructorArgs(array(array(), $image_effect_id, array(), $logger))
+      ->setConstructorArgs([[], $image_effect_id, [], $logger])
       ->getMock();
     $image_effect->expects($this->any())
       ->method('getDerivativeExtension')
@@ -114,7 +114,7 @@ public function testGetDerivativeExtension() {
 
     $image_style = $this->getImageStyleMock($image_effect_id, $image_effect);
 
-    $extensions = array('jpeg', 'gif', 'png');
+    $extensions = ['jpeg', 'gif', 'png'];
     foreach ($extensions as $extension) {
       $extensionReturned = $image_style->getDerivativeExtension($extension);
       $this->assertEquals($extensionReturned, 'png');
@@ -129,7 +129,7 @@ public function testBuildUri() {
     $image_effect_id = $this->randomMachineName();
     $logger = $this->getMockBuilder('\Psr\Log\LoggerInterface')->getMock();
     $image_effect = $this->getMockBuilder('\Drupal\image\ImageEffectBase')
-      ->setConstructorArgs(array(array(), $image_effect_id, array(), $logger))
+      ->setConstructorArgs([[], $image_effect_id, [], $logger])
       ->getMock();
     $image_effect->expects($this->any())
       ->method('getDerivativeExtension')
@@ -141,7 +141,7 @@ public function testBuildUri() {
     // Image style that doesn't change the extension.
     $image_effect_id = $this->randomMachineName();
     $image_effect = $this->getMockBuilder('\Drupal\image\ImageEffectBase')
-      ->setConstructorArgs(array(array(), $image_effect_id, array(), $logger))
+      ->setConstructorArgs([[], $image_effect_id, [], $logger])
       ->getMock();
     $image_effect->expects($this->any())
       ->method('getDerivativeExtension')
@@ -162,13 +162,13 @@ public function testGetPathToken() {
     // Image style that changes the extension.
     $image_effect_id = $this->randomMachineName();
     $image_effect = $this->getMockBuilder('\Drupal\image\ImageEffectBase')
-      ->setConstructorArgs(array(array(), $image_effect_id, array(), $logger))
+      ->setConstructorArgs([[], $image_effect_id, [], $logger])
       ->getMock();
     $image_effect->expects($this->any())
       ->method('getDerivativeExtension')
       ->will($this->returnValue('png'));
 
-    $image_style = $this->getImageStyleMock($image_effect_id, $image_effect, array('getPrivateKey', 'getHashSalt'));
+    $image_style = $this->getImageStyleMock($image_effect_id, $image_effect, ['getPrivateKey', 'getHashSalt']);
     $image_style->expects($this->any())
       ->method('getPrivateKey')
       ->will($this->returnValue($private_key));
@@ -184,13 +184,13 @@ public function testGetPathToken() {
     // Image style that doesn't change the extension.
     $image_effect_id = $this->randomMachineName();
     $image_effect = $this->getMockBuilder('\Drupal\image\ImageEffectBase')
-      ->setConstructorArgs(array(array(), $image_effect_id, array(), $logger))
+      ->setConstructorArgs([[], $image_effect_id, [], $logger])
       ->getMock();
     $image_effect->expects($this->any())
       ->method('getDerivativeExtension')
       ->will($this->returnArgument(0));
 
-    $image_style = $this->getImageStyleMock($image_effect_id, $image_effect, array('getPrivateKey', 'getHashSalt'));
+    $image_style = $this->getImageStyleMock($image_effect_id, $image_effect, ['getPrivateKey', 'getHashSalt']);
     $image_style->expects($this->any())
       ->method('getPrivateKey')
       ->will($this->returnValue($private_key));
diff --git a/core/modules/language/language.admin.inc b/core/modules/language/language.admin.inc
index b5a8ec6fc6369594227681244949a2068df7b2c8..a55e65a23cb6ee9d807c1c9502fb0ad85e93662b 100644
--- a/core/modules/language/language.admin.inc
+++ b/core/modules/language/language.admin.inc
@@ -19,33 +19,33 @@
  */
 function template_preprocess_language_negotiation_configure_form(&$variables) {
   $form =& $variables['form'];
-  $variables['language_types'] = array();
+  $variables['language_types'] = [];
 
   foreach ($form['#language_types'] as $type) {
-    $header = array(
+    $header = [
       t('Detection method'),
       t('Description'),
       t('Enabled'),
       t('Weight'),
-    );
+    ];
 
     // If there is at least one operation enabled show the operation column.
     if ($form[$type]['#show_operations']) {
       $header[] = t('Operations');
     }
 
-    $table = array(
+    $table = [
       '#type' => 'table',
       '#header' => $header,
-      '#attributes' => array('id' => 'language-negotiation-methods-' . $type),
-      '#tabledrag' => array(
-        array(
+      '#attributes' => ['id' => 'language-negotiation-methods-' . $type],
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'language-method-weight-' . $type,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     foreach ($form[$type]['title'] as $id => $element) {
       // Do not take form control structures.
@@ -53,11 +53,11 @@ function template_preprocess_language_negotiation_configure_form(&$variables) {
         $table[$id]['#attributes']['class'][] = 'draggable';
         $table[$id]['#weight'] = $element['#weight'];
 
-        $table[$id]['title'] = array(
+        $table[$id]['title'] = [
           '#prefix' => '<strong>',
           $form[$type]['title'][$id],
           '#suffix' => '</strong>',
-        );
+        ];
         $table[$id]['description'] = $form[$type]['description'][$id];
         $table[$id]['enabled'] = $form[$type]['enabled'][$id];
         $table[$id]['weight'] = $form[$type]['weight'][$id];
@@ -77,7 +77,7 @@ function template_preprocess_language_negotiation_configure_form(&$variables) {
     $configurable = isset($form[$type]['configurable']) ? $form[$type]['configurable'] : NULL;
     unset($form[$type]['configurable']);
 
-    $variables['language_types'][] = array(
+    $variables['language_types'][] = [
       'type' => $type,
       'title' => $form[$type]['#title'],
       'description' => $form[$type]['#description'],
@@ -85,7 +85,7 @@ function template_preprocess_language_negotiation_configure_form(&$variables) {
       'table' => $table,
       'children' => $form[$type],
       'attributes' => new Attribute(),
-    );
+    ];
     // Prevent the type from rendering with the remaining form child elements.
     unset($form[$type]);
   }
@@ -107,42 +107,42 @@ function template_preprocess_language_content_settings_table(&$variables) {
   // Add a render element representing the bundle language settings table.
   $element = $variables['element'];
 
-  $header = array(
-    array(
+  $header = [
+    [
       'data' => $element['#bundle_label'],
-      'class' => array('bundle'),
-    ),
-    array(
+      'class' => ['bundle'],
+    ],
+    [
       'data' => t('Configuration'),
-      'class' => array('operations'),
-    ),
-  );
+      'class' => ['operations'],
+    ],
+  ];
 
-  $rows = array();
+  $rows = [];
   foreach (Element::children($element) as $bundle) {
-    $rows[$bundle] = array(
-      'data' => array(
-        array(
-          'data' => array(
+    $rows[$bundle] = [
+      'data' => [
+        [
+          'data' => [
             '#prefix' => '<label>',
             '#suffix' => '</label>',
             '#plain_text' => $element[$bundle]['settings']['#label'],
-          ),
-          'class' => array('bundle'),
-        ),
-        array(
+          ],
+          'class' => ['bundle'],
+        ],
+        [
           'data' => $element[$bundle]['settings'],
-          'class' => array('operations'),
-        ),
-      ),
-      'class' => array('bundle-settings'),
-    );
+          'class' => ['operations'],
+        ],
+      ],
+      'class' => ['bundle-settings'],
+    ];
   }
 
   $variables['title'] = $element['#title'];
-  $variables['build'] = array(
+  $variables['build'] = [
     '#header' => $header,
     '#rows' => $rows,
     '#type' => 'table',
-  );
+  ];
 }
diff --git a/core/modules/language/language.api.php b/core/modules/language/language.api.php
index aaaa5a3dd6ae60dd48852dd36f095a49ccd79c50..ff04a8e71c21d4fe37a55f77d60f7cf5f975ff91 100644
--- a/core/modules/language/language.api.php
+++ b/core/modules/language/language.api.php
@@ -35,17 +35,17 @@
  * @ingroup language_negotiation
  */
 function hook_language_types_info() {
-  return array(
-    'custom_language_type' => array(
+  return [
+    'custom_language_type' => [
       'name' => t('Custom language'),
       'description' => t('A custom language type.'),
       'locked' => FALSE,
-    ),
-    'fixed_custom_language_type' => array(
+    ],
+    'fixed_custom_language_type' => [
       'locked' => TRUE,
-      'fixed' => array('custom_language_negotiation_method'),
-    ),
-  );
+      'fixed' => ['custom_language_negotiation_method'],
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/language/language.module b/core/modules/language/language.module
index 516f54fb7b1b99a72749fc007de242d8f6a86dcd..8066aa9194c787cb84c3b038c7f13503fd74a772 100644
--- a/core/modules/language/language.module
+++ b/core/modules/language/language.module
@@ -29,42 +29,42 @@ function language_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.language':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Language module allows you to configure the languages used on your site, and provides information for the <a href=":content">Content Translation</a>, <a href=":interface">Interface Translation</a>, and <a href=":configuration">Configuration Translation</a> modules, if they are enabled. For more information, see the <a href=":doc_url">online documentation for the Language module</a>.', array(':doc_url' => 'https://www.drupal.org/documentation/modules/language', ':content' => (\Drupal::moduleHandler()->moduleExists('content_translation')) ? \Drupal::url('help.page', array('name' => 'content_translation')) : '#', ':interface' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', array('name' => 'locale')) : '#', ':configuration' => (\Drupal::moduleHandler()->moduleExists('config_translation')) ? \Drupal::url('help.page', array('name' => 'config_translation')) : '#')) . '</p>';
+      $output .= '<p>' . t('The Language module allows you to configure the languages used on your site, and provides information for the <a href=":content">Content Translation</a>, <a href=":interface">Interface Translation</a>, and <a href=":configuration">Configuration Translation</a> modules, if they are enabled. For more information, see the <a href=":doc_url">online documentation for the Language module</a>.', [':doc_url' => 'https://www.drupal.org/documentation/modules/language', ':content' => (\Drupal::moduleHandler()->moduleExists('content_translation')) ? \Drupal::url('help.page', ['name' => 'content_translation']) : '#', ':interface' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', ['name' => 'locale']) : '#', ':configuration' => (\Drupal::moduleHandler()->moduleExists('config_translation')) ? \Drupal::url('help.page', ['name' => 'config_translation']) : '#']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Adding languages') . '</dt>';
-      $output .= '<dd>' . t('You can add languages on the <a href=":language_list">Languages</a> page by selecting <em>Add language</em> and choosing a language from the drop-down menu. This language is then displayed in the languages list, where it can be configured further. If the <a href=":interface">Interface translation module</a> is enabled, and the <em>translation server</em> is set as a translation source, then the interface translation for this language is automatically downloaded as well.', array(':language_list' => \Drupal::url('entity.configurable_language.collection'), ':interface' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', array('name' => 'locale')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('You can add languages on the <a href=":language_list">Languages</a> page by selecting <em>Add language</em> and choosing a language from the drop-down menu. This language is then displayed in the languages list, where it can be configured further. If the <a href=":interface">Interface translation module</a> is enabled, and the <em>translation server</em> is set as a translation source, then the interface translation for this language is automatically downloaded as well.', [':language_list' => \Drupal::url('entity.configurable_language.collection'), ':interface' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', ['name' => 'locale']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Adding custom languages') . '</dt>';
       $output .= '<dd>' . t('You can add a language that is not provided in the drop-down list by choosing <em>Custom language</em> at the end of the list. You then have to configure its language code, name, and direction in the form provided.') . '</dd>';
       $output .= '<dt>' . t('Configuring content languages') . '</dt>';
-      $output .= '<dd>' . t('By default, content is created in the site\'s default language and no language selector is displayed on content creation pages. On the <a href=":content_language">Content language</a> page you can customize the language configuration for any supported content entity on your site (for example for content types or menu links). After choosing an entity, you are provided with a drop-down menu to set the default language and a check-box to display language selectors.', array(':content_language' => \Drupal::url('language.content_settings_page'))) . '</dd>';
+      $output .= '<dd>' . t('By default, content is created in the site\'s default language and no language selector is displayed on content creation pages. On the <a href=":content_language">Content language</a> page you can customize the language configuration for any supported content entity on your site (for example for content types or menu links). After choosing an entity, you are provided with a drop-down menu to set the default language and a check-box to display language selectors.', [':content_language' => \Drupal::url('language.content_settings_page')]) . '</dd>';
       $output .= '<dt>' . t('Adding a language switcher block') . '</dt>';
-      $output .= '<dd>' . t('If the Block module is enabled, then you can add a language switcher block on the <a href=":blocks">Block layout</a> page to allow users to switch between languages.', array(':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
+      $output .= '<dd>' . t('If the Block module is enabled, then you can add a language switcher block on the <a href=":blocks">Block layout</a> page to allow users to switch between languages.', [':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#']) . '</dd>';
       $output .= '<dt>' . t('Making a block visible per language') . '</dt>';
-      $output .= '<dd>' . t('If the Block module is enabled, then the Language module allows you to set the visibility of a block based on selected languages on the <a href=":blocks">Block layout</a> page.', array(':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
+      $output .= '<dd>' . t('If the Block module is enabled, then the Language module allows you to set the visibility of a block based on selected languages on the <a href=":blocks">Block layout</a> page.', [':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#']) . '</dd>';
       $output .= '<dt>' . t('Choosing user languages') . '</dt>';
       $output .= '<dd>' . t('Users can choose a <em>Site language</em> on their profile page. This language is used for email messages, and can be used by modules to determine a user\'s language. It can also be used for interface text, if the <em>User</em> method is enabled as a <em>Detection and selection</em> method (see below). Administrative users can choose a separate <em>Administration pages language</em> for the interface text on administration pages. This configuration is only available on the user\'s profile page if the <em>Account administration pages</em> method is enabled (see below).') . '</dd>';
       $output .= '<dt>' . t('Language detection and selection') . '</dt>';
-      $output .= '<dd>' . t('The <a href=":detection">Detection and selection</a> page provides several methods for deciding which language is used for displaying interface text. When a method detects and selects an interface language, then the following methods in the list are not applied. You can order them by importance, with your preferred method at the top of the list, followed by one or several fall-back methods.', array(':detection' => \Drupal::url('language.negotiation')));
+      $output .= '<dd>' . t('The <a href=":detection">Detection and selection</a> page provides several methods for deciding which language is used for displaying interface text. When a method detects and selects an interface language, then the following methods in the list are not applied. You can order them by importance, with your preferred method at the top of the list, followed by one or several fall-back methods.', [':detection' => \Drupal::url('language.negotiation')]);
       $output .= '<ul><li>' . t('<em>URL</em> sets the interface language based on a path prefix or domain (for example specifying <em>de</em> for German would result in URLs like <em>example.com/de/contact</em>). The default language does not require a path prefix, but can have one assigned as well. If the language detection is done by domain name, a domain needs to be specified for each language.') . '</li>';
       $output .= '<li>' . t('<em>Session</em> determines the interface language from a request or session parameter (for example <em>example.com?language=de</em> would set the interface language to German based on the use of <em>de</em> as the <em>language</em> parameter).') . '</li>';
       $output .= '<li>' . t('<em>User</em> follows the language configuration set on the user\'s profile page.') . '</li>';
-      $output .= '<li>' . t('<em>Browser</em> sets the interface language based on the browser\'s language settings. Since browsers use different language codes to refer to the same languages, you can add and edit languages codes to map the browser language codes to the <a href=":language_list">language codes</a> used on your site.', array(':language_list' => \Drupal::url('entity.configurable_language.collection'))) . '</li>';
+      $output .= '<li>' . t('<em>Browser</em> sets the interface language based on the browser\'s language settings. Since browsers use different language codes to refer to the same languages, you can add and edit languages codes to map the browser language codes to the <a href=":language_list">language codes</a> used on your site.', [':language_list' => \Drupal::url('entity.configurable_language.collection')]) . '</li>';
       $output .= '<li>' . t('<em>Account administration pages</em> follows the configuration set as <em>Administration pages language</em> on the profile page of an administrative user. This method is similar to the <em>User</em> method, but only sets the interface text language on administration pages, independent of the interface text language on other pages.') . '</li>';
       $output .= '<li>' . t('<em>Selected language</em> allows you to specify the site\'s default language or a specific language as the fall-back language. This method should be listed last.') . '</li></ul></dd>';
       $output .= '</dl>';
       return $output;
 
     case 'entity.configurable_language.collection':
-      $output = '<p>' . t('Reorder the configured languages to set their order in the language switcher block and, when editing content, in the list of selectable languages. This ordering does not impact <a href=":detection">detection and selection</a>.', array(':detection' => \Drupal::url('language.negotiation'))) . '</p>';
-      $output .= '<p>' . t('The site default language can also be set. It is not recommended to change the default language on a working site. <a href=":language-detection">Configure the Selected language</a> setting on the detection and selection page to change the fallback language for language selection.', array(':language-detection' => \Drupal::url('language.negotiation'))) . '</p>';
+      $output = '<p>' . t('Reorder the configured languages to set their order in the language switcher block and, when editing content, in the list of selectable languages. This ordering does not impact <a href=":detection">detection and selection</a>.', [':detection' => \Drupal::url('language.negotiation')]) . '</p>';
+      $output .= '<p>' . t('The site default language can also be set. It is not recommended to change the default language on a working site. <a href=":language-detection">Configure the Selected language</a> setting on the detection and selection page to change the fallback language for language selection.', [':language-detection' => \Drupal::url('language.negotiation')]) . '</p>';
       return $output;
 
     case 'language.add':
       return '<p>' . t('Add a language to be supported by your site. If your desired language is not available, pick <em>Custom language...</em> at the end and provide a language code and other details manually.') . '</p>';
 
     case 'language.negotiation':
-      $output = '<p>' . t('Define how to decide which language is used to display page elements (primarily text provided by modules, such as field labels and help text). This decision is made by evaluating a series of detection methods for languages; the first detection method that gets a result will determine which language is used for that type of text. Be aware that some language detection methods are unreliable under certain conditions, such as browser detection when page-caching is enabled and a user is not currently logged in. Define the order of evaluation of language detection methods on this page. The default language can be changed in the <a href=":admin-change-language">list of languages</a>.', array(':admin-change-language' => \Drupal::url('entity.configurable_language.collection'))) . '</p>';
+      $output = '<p>' . t('Define how to decide which language is used to display page elements (primarily text provided by modules, such as field labels and help text). This decision is made by evaluating a series of detection methods for languages; the first detection method that gets a result will determine which language is used for that type of text. Be aware that some language detection methods are unreliable under certain conditions, such as browser detection when page-caching is enabled and a user is not currently logged in. Define the order of evaluation of language detection methods on this page. The default language can be changed in the <a href=":admin-change-language">list of languages</a>.', [':admin-change-language' => \Drupal::url('entity.configurable_language.collection')]) . '</p>';
       return $output;
 
     case 'language.negotiation_session':
@@ -72,11 +72,11 @@ function language_help($route_name, RouteMatchInterface $route_match) {
       return $output;
 
     case 'language.negotiation_browser':
-      $output = '<p>' . t('Browsers use different language codes to refer to the same languages. Internally, a best effort is made to determine the correct language based on the code that the browser sends. You can add and edit additional mappings from browser language codes to <a href=":configure-languages">site languages</a>.', array(':configure-languages' => \Drupal::url('entity.configurable_language.collection'))) . '</p>';
+      $output = '<p>' . t('Browsers use different language codes to refer to the same languages. Internally, a best effort is made to determine the correct language based on the code that the browser sends. You can add and edit additional mappings from browser language codes to <a href=":configure-languages">site languages</a>.', [':configure-languages' => \Drupal::url('entity.configurable_language.collection')]) . '</p>';
       return $output;
 
     case 'language.negotiation_selected':
-      $output = '<p>' . t('Changing the selected language here (and leaving this option as the last among the detection and selection options) is the easiest way to change the fallback language for the website, if you need to change how your site works by default (e.g., when using an empty path prefix or using the default domain). <a href=":admin-change-language">Changing the site\'s default language</a> itself might have other undesired side effects.', array(':admin-change-language' => \Drupal::url('entity.configurable_language.collection'))) . '</p>';
+      $output = '<p>' . t('Changing the selected language here (and leaving this option as the last among the detection and selection options) is the easiest way to change the fallback language for the website, if you need to change how your site works by default (e.g., when using an empty path prefix or using the default domain). <a href=":admin-change-language">Changing the site\'s default language</a> itself might have other undesired side effects.', [':admin-change-language' => \Drupal::url('entity.configurable_language.collection')]) . '</p>';
       return $output;
 
     case 'entity.block.edit_form':
@@ -100,16 +100,16 @@ function language_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function language_theme() {
-  return array(
-    'language_negotiation_configure_form' => array(
+  return [
+    'language_negotiation_configure_form' => [
       'render element' => 'form',
       'file' => 'language.admin.inc',
-    ),
-    'language_content_settings_table' => array(
+    ],
+    'language_content_settings_table' => [
       'render element' => 'element',
       'file' => 'language.admin.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -123,18 +123,18 @@ function language_element_info_alter(&$type) {
   // field.
   if (isset($type['language_select'])) {
     if (!isset($type['language_select']['#process'])) {
-      $type['language_select']['#process'] = array();
+      $type['language_select']['#process'] = [];
     }
     if (!isset($type['language_select']['#theme_wrappers'])) {
-      $type['language_select']['#theme_wrappers'] = array();
+      $type['language_select']['#theme_wrappers'] = [];
     }
-    $type['language_select']['#process'] = array_merge($type['language_select']['#process'], array(
+    $type['language_select']['#process'] = array_merge($type['language_select']['#process'], [
       'language_process_language_select',
-      array('Drupal\Core\Render\Element\Select', 'processSelect'),
-      array('Drupal\Core\Render\Element\RenderElement', 'processAjaxForm'),
-    ));
+      ['Drupal\Core\Render\Element\Select', 'processSelect'],
+      ['Drupal\Core\Render\Element\RenderElement', 'processAjaxForm'],
+    ]);
     $type['language_select']['#theme'] = 'select';
-    $type['language_select']['#theme_wrappers'] = array_merge($type['language_select']['#theme_wrappers'], array('form_element'));
+    $type['language_select']['#theme_wrappers'] = array_merge($type['language_select']['#theme_wrappers'], ['form_element']);
     $type['language_select']['#languages'] = LanguageInterface::STATE_CONFIGURABLE;
     $type['language_select']['#multiple'] = FALSE;
   }
@@ -153,9 +153,9 @@ function language_process_language_select($element) {
   // Don't set the options if another module (translation for example) already
   // set the options.
   if (!isset($element['#options'])) {
-    $element['#options'] = array();
+    $element['#options'] = [];
     foreach (\Drupal::languageManager()->getLanguages($element['#languages']) as $langcode => $language) {
-      $element['#options'][$langcode] = $language->isLocked() ? t('- @name -', array('@name' => $language->getName())) : $language->getName();
+      $element['#options'][$langcode] = $language->isLocked() ? t('- @name -', ['@name' => $language->getName()]) : $language->getName();
     }
   }
   return $element;
@@ -168,7 +168,7 @@ function language_entity_base_field_info_alter(&$fields) {
   foreach ($fields as $definition) {
     // Set configurable form display for language fields with display options.
     if ($definition->getType() == 'language') {
-      foreach (array('form', 'view') as $type) {
+      foreach (['form', 'view'] as $type) {
         if ($definition->getDisplayOptions($type)) {
           // The related configurations will be purged manually on Language
           // module uninstallation. @see language_modules_uninstalled().
@@ -201,8 +201,8 @@ function language_configuration_element_submit(&$form, FormStateInterface $form_
         }
       }
       $config = ContentLanguageSettings::loadByEntityTypeBundle($entity_type_id, $bundle);
-      $config->setDefaultLangcode($form_state->getValue(array($element_name, 'langcode')));
-      $config->setLanguageAlterable($form_state->getValue(array($element_name, 'language_alterable')));
+      $config->setDefaultLangcode($form_state->getValue([$element_name, 'langcode']));
+      $config->setLanguageAlterable($form_state->getValue([$element_name, 'language_alterable']));
       $config->save();
 
       // Set the form_state languaged with the updated bundle.
@@ -325,7 +325,7 @@ function language_modules_installed($modules) {
     // display definitions to make language fields display configurable. Since
     // this is not a hard dependency, and thus is not detected by the config
     // system, we have to clean up the related values manually.
-    foreach (array('entity_view_display', 'entity_form_display') as $key) {
+    foreach (['entity_view_display', 'entity_form_display'] as $key) {
       $displays = \Drupal::entityManager()->getStorage($key)->loadMultiple();
       /** @var \Drupal\Core\Entity\Display\EntityDisplayInterface $display */
       foreach ($displays as $display) {
@@ -393,7 +393,7 @@ function language_preprocess_block(&$variables) {
 function language_get_browser_drupal_langcode_mappings() {
   $config = \Drupal::config('language.mappings');
   if ($config->isNew()) {
-    return array();
+    return [];
   }
   return $config->get('map');
 }
@@ -462,7 +462,7 @@ function language_tour_tips_alter(array &$tour_tips, EntityInterface $entity) {
     }
     elseif ($tour_tip->get('id') == 'language-continue') {
       $additional_continue = '';
-      $additional_modules = array();
+      $additional_modules = [];
       if (!Drupal::service('module_handler')->moduleExists('locale')) {
         $additional_modules[] = Drupal::service('module_handler')->getName('locale');
       }
diff --git a/core/modules/language/src/Config/LanguageConfigFactoryOverride.php b/core/modules/language/src/Config/LanguageConfigFactoryOverride.php
index d1dd753ee435889cd7890c0ba01f51161d6a0972..4c60a72a21f8d450a38539b4f92269ad5f118448 100644
--- a/core/modules/language/src/Config/LanguageConfigFactoryOverride.php
+++ b/core/modules/language/src/Config/LanguageConfigFactoryOverride.php
@@ -88,7 +88,7 @@ public function loadOverrides($names) {
       $storage = $this->getStorage($this->language->getId());
       return $storage->readMultiple($names);
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/language/src/Config/LanguageConfigOverride.php b/core/modules/language/src/Config/LanguageConfigOverride.php
index 15e4fa60c2e5c139e33b61ae79f3568d098d96a7..6effe238fa393330e025ecb7ad78ad06dc34cc5b 100644
--- a/core/modules/language/src/Config/LanguageConfigOverride.php
+++ b/core/modules/language/src/Config/LanguageConfigOverride.php
@@ -71,7 +71,7 @@ public function save($has_trusted_data = FALSE) {
    * {@inheritdoc}
    */
   public function delete() {
-    $this->data = array();
+    $this->data = [];
     $this->storage->delete($this->name);
     Cache::invalidateTags($this->getCacheTags());
     $this->isNew = TRUE;
diff --git a/core/modules/language/src/ConfigurableLanguageManager.php b/core/modules/language/src/ConfigurableLanguageManager.php
index 614cf7737cf24d1efd5e689ccd37fd608cf00308..de64c4423a7c87ad3d6fe58eaceff5a89be42e92 100644
--- a/core/modules/language/src/ConfigurableLanguageManager.php
+++ b/core/modules/language/src/ConfigurableLanguageManager.php
@@ -168,7 +168,7 @@ public function getDefinedLanguageTypes() {
    */
   protected function loadLanguageTypesConfiguration() {
     if (!$this->languageTypes) {
-      $this->languageTypes = $this->configFactory->get('language.types')->get() ?: array('configurable' => array(), 'all' => parent::getLanguageTypes());
+      $this->languageTypes = $this->configFactory->get('language.types')->get() ?: ['configurable' => [], 'all' => parent::getLanguageTypes()];
     }
     return $this->languageTypes;
   }
@@ -227,7 +227,7 @@ public function getCurrentLanguage($type = LanguageInterface::TYPE_INTERFACE) {
         // afterwards. This can happen for instance while parsing negotiation
         // method definitions.
         elseif ($type == LanguageInterface::TYPE_INTERFACE) {
-          return new Language(array('id' => LanguageInterface::LANGCODE_SYSTEM));
+          return new Language(['id' => LanguageInterface::LANGCODE_SYSTEM]);
         }
       }
     }
@@ -241,11 +241,11 @@ public function getCurrentLanguage($type = LanguageInterface::TYPE_INTERFACE) {
   public function reset($type = NULL) {
     if (!isset($type)) {
       $this->initialized = FALSE;
-      $this->negotiatedLanguages = array();
-      $this->negotiatedMethods = array();
+      $this->negotiatedLanguages = [];
+      $this->negotiatedMethods = [];
       $this->languageTypes = NULL;
       $this->languageTypesInfo = NULL;
-      $this->languages = array();
+      $this->languages = [];
       if ($this->negotiator) {
         $this->negotiator->reset();
       }
@@ -270,7 +270,7 @@ public function getNegotiator() {
   public function setNegotiator(LanguageNegotiatorInterface $negotiator) {
     $this->negotiator = $negotiator;
     $this->initialized = FALSE;
-    $this->negotiatedLanguages = array();
+    $this->negotiatedLanguages = [];
   }
 
   /**
@@ -292,7 +292,7 @@ public function getLanguages($flags = LanguageInterface::STATE_CONFIGURABLE) {
       // and the configuration entities for languages are not yet fully
       // imported.
       $default = $this->getDefaultLanguage();
-      $languages = array($default->getId() => $default);
+      $languages = [$default->getId() => $default];
       $languages += $this->getDefaultLockedLanguages($default->getWeight());
 
       // Load configurable languages on top of the defaults. Ideally this could
@@ -325,7 +325,7 @@ public function getLanguages($flags = LanguageInterface::STATE_CONFIGURABLE) {
    */
   public function getNativeLanguages() {
     $languages = $this->getLanguages(LanguageInterface::STATE_CONFIGURABLE);
-    $natives = array();
+    $natives = [];
 
     $original_language = $this->getConfigOverrideLanguage();
 
@@ -363,9 +363,9 @@ public function updateLockedLanguageWeights() {
   /**
    * {@inheritdoc}
    */
-  public function getFallbackCandidates(array $context = array()) {
+  public function getFallbackCandidates(array $context = []) {
     if ($this->isMultilingual()) {
-      $candidates = array();
+      $candidates = [];
       if (empty($context['operation']) || $context['operation'] != 'locale_lookup') {
         // If the fallback context is not locale_lookup, initialize the
         // candidates with languages ordered by weight and add
@@ -379,13 +379,13 @@ public function getFallbackCandidates(array $context = array()) {
         // The first candidate should always be the desired language if
         // specified.
         if (!empty($context['langcode'])) {
-          $candidates = array($context['langcode'] => $context['langcode']) + $candidates;
+          $candidates = [$context['langcode'] => $context['langcode']] + $candidates;
         }
       }
 
       // Let other modules hook in and add/change candidates.
       $type = 'language_fallback_candidates';
-      $types = array();
+      $types = [];
       if (!empty($context['operation'])) {
         $types[] = $type . '_' . $context['operation'];
       }
@@ -415,7 +415,7 @@ public function getLanguageSwitchLinks($type, Url $url) {
           if (!empty($result)) {
             // Allow modules to provide translations for specific links.
             $this->moduleHandler->alter('language_switch_links', $result, $type, $url);
-            $links = (object) array('links' => $result, 'method_id' => $method_id);
+            $links = (object) ['links' => $result, 'method_id' => $method_id];
             break;
           }
         }
diff --git a/core/modules/language/src/DefaultLanguageItem.php b/core/modules/language/src/DefaultLanguageItem.php
index 0e3889050a182265b611009a51df7fa2a533f0a3..83deee0daa8a15d4c5e0efe5a65e9816a22043bc 100644
--- a/core/modules/language/src/DefaultLanguageItem.php
+++ b/core/modules/language/src/DefaultLanguageItem.php
@@ -29,7 +29,7 @@ public function applyDefaultValue($notify = TRUE) {
       $langcode = $this->getDefaultLangcode($entity);
     }
     // Always notify otherwise default langcode will not be set correctly.
-    $this->setValue(array('value' => $langcode), TRUE);
+    $this->setValue(['value' => $langcode], TRUE);
     return $this;
   }
 
diff --git a/core/modules/language/src/Element/LanguageConfiguration.php b/core/modules/language/src/Element/LanguageConfiguration.php
index 07796934e5312c76df45be0feca9b79212086849..63505bb411594b19c158810c168bc866bd0a287e 100644
--- a/core/modules/language/src/Element/LanguageConfiguration.php
+++ b/core/modules/language/src/Element/LanguageConfiguration.php
@@ -18,50 +18,50 @@ class LanguageConfiguration extends FormElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
+    return [
       '#input' => TRUE,
       '#tree' => TRUE,
-      '#process' => array(
-        array($class, 'processLanguageConfiguration'),
-      ),
-    );
+      '#process' => [
+        [$class, 'processLanguageConfiguration'],
+      ],
+    ];
   }
 
   /**
    * Process handler for the language_configuration form element.
    */
   public static function processLanguageConfiguration(&$element, FormStateInterface $form_state, &$form) {
-    $options = isset($element['#options']) ? $element['#options'] : array();
+    $options = isset($element['#options']) ? $element['#options'] : [];
     // Avoid validation failure since we are moving the '#options' key in the
     // nested 'language' select element.
     unset($element['#options']);
     /** @var \Drupal\language\Entity\ContentLanguageSettings $default_config */
     $default_config = $element['#default_value'];
-    $element['langcode'] = array(
+    $element['langcode'] = [
       '#type' => 'select',
       '#title' => t('Default language'),
       '#options' => $options + static::getDefaultOptions(),
-      '#description' => t('Explanation of the language options is found on the <a href=":languages_list_page">languages list page</a>.', array(':languages_list_page' => \Drupal::url('entity.configurable_language.collection'))),
+      '#description' => t('Explanation of the language options is found on the <a href=":languages_list_page">languages list page</a>.', [':languages_list_page' => \Drupal::url('entity.configurable_language.collection')]),
       '#default_value' => ($default_config != NULL) ? $default_config->getDefaultLangcode() : LanguageInterface::LANGCODE_SITE_DEFAULT,
-    );
+    ];
 
-    $element['language_alterable'] = array(
+    $element['language_alterable'] = [
       '#type' => 'checkbox',
       '#title' => t('Show language selector on create and edit pages'),
       '#default_value' => ($default_config != NULL) ? $default_config->isLanguageAlterable() : FALSE,
-    );
+    ];
 
     // Add the entity type and bundle information to the form if they are set.
     // They will be used, in the submit handler, to generate the names of the
     // configuration entities that will store the settings and are a way to uniquely
     // identify the entity.
     $language = $form_state->get('language') ?: [];
-    $language += array(
-      $element['#name'] => array(
+    $language += [
+      $element['#name'] => [
         'entity_type' => $element['#entity_information']['entity_type'],
         'bundle' => $element['#entity_information']['bundle'],
-      ),
-    );
+      ],
+    ];
     $form_state->set('language', $language);
 
     // Do not add the submit callback for the language content settings page,
@@ -89,15 +89,15 @@ public static function processLanguageConfiguration(&$element, FormStateInterfac
    *   An array containing the default options.
    */
   protected static function getDefaultOptions() {
-    $language_options = array(
-      LanguageInterface::LANGCODE_SITE_DEFAULT => t("Site's default language (@language)", array('@language' => static::languageManager()->getDefaultLanguage()->getName())),
+    $language_options = [
+      LanguageInterface::LANGCODE_SITE_DEFAULT => t("Site's default language (@language)", ['@language' => static::languageManager()->getDefaultLanguage()->getName()]),
       'current_interface' => t('Interface text language selected for page'),
       'authors_default' => t("Author's preferred language"),
-    );
+    ];
 
     $languages = static::languageManager()->getLanguages(LanguageInterface::STATE_ALL);
     foreach ($languages as $langcode => $language) {
-      $language_options[$langcode] = $language->isLocked() ? t('- @name -', array('@name' => $language->getName())) : $language->getName();
+      $language_options[$langcode] = $language->isLocked() ? t('- @name -', ['@name' => $language->getName()]) : $language->getName();
     }
 
     return $language_options;
diff --git a/core/modules/language/src/Entity/ConfigurableLanguage.php b/core/modules/language/src/Entity/ConfigurableLanguage.php
index b19c328c890691ce446a007db2be1cd22d8cfbbf..c277a85bd76260d5767b66cfead646b12bb46b1a 100644
--- a/core/modules/language/src/Entity/ConfigurableLanguage.php
+++ b/core/modules/language/src/Entity/ConfigurableLanguage.php
@@ -246,18 +246,18 @@ public static function createFromLangcode($langcode) {
     if (!isset($standard_languages[$langcode])) {
       // Drupal does not know about this language, so we set its values with the
       // best guess. The user will be able to edit afterwards.
-      return static::create(array(
+      return static::create([
         'id' => $langcode,
         'label' => $langcode,
-      ));
+      ]);
     }
     else {
       // A known predefined language, details will be filled in properly.
-      return static::create(array(
+      return static::create([
         'id' => $langcode,
         'label' => $standard_languages[$langcode][0],
         'direction' => isset($standard_languages[$langcode][2]) ? $standard_languages[$langcode][2] : static::DIRECTION_LTR,
-      ));
+      ]);
     }
   }
 
diff --git a/core/modules/language/src/EventSubscriber/ConfigSubscriber.php b/core/modules/language/src/EventSubscriber/ConfigSubscriber.php
index 4159c377bbeca9691b3034f05567f9c43726093f..103f9128d3937768851bcfe1cea321453b55bd3a 100644
--- a/core/modules/language/src/EventSubscriber/ConfigSubscriber.php
+++ b/core/modules/language/src/EventSubscriber/ConfigSubscriber.php
@@ -141,7 +141,7 @@ public function setPathProcessorLanguage(PathProcessorLanguage $path_processor_l
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[ConfigEvents::SAVE][] = array('onConfigSave', 0);
+    $events[ConfigEvents::SAVE][] = ['onConfigSave', 0];
     return $events;
   }
 
diff --git a/core/modules/language/src/EventSubscriber/LanguageRequestSubscriber.php b/core/modules/language/src/EventSubscriber/LanguageRequestSubscriber.php
index 0656bdc6bc17b7a6aeee7a77a79285e71a983080..fd925dd85515c76131b3e102759f05c63e26ac8b 100644
--- a/core/modules/language/src/EventSubscriber/LanguageRequestSubscriber.php
+++ b/core/modules/language/src/EventSubscriber/LanguageRequestSubscriber.php
@@ -90,7 +90,7 @@ public function onKernelRequestLanguage(GetResponseEvent $event) {
    *   An array of event listener definitions.
    */
   static function getSubscribedEvents() {
-    $events[KernelEvents::REQUEST][] = array('onKernelRequestLanguage', 255);
+    $events[KernelEvents::REQUEST][] = ['onKernelRequestLanguage', 255];
 
     return $events;
   }
diff --git a/core/modules/language/src/Form/ContentLanguageSettingsForm.php b/core/modules/language/src/Form/ContentLanguageSettingsForm.php
index b86f7bc5d2b1d98b4ac6b63472585765583b8e39..a11552993b45ae0797134e93ef15f0c8448fd0cb 100644
--- a/core/modules/language/src/Form/ContentLanguageSettingsForm.php
+++ b/core/modules/language/src/Form/ContentLanguageSettingsForm.php
@@ -52,11 +52,11 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $entity_types = $this->entityManager->getDefinitions();
-    $labels = array();
-    $default = array();
+    $labels = [];
+    $default = [];
 
     $bundles = $this->entityManager->getAllBundleInfo();
-    $language_configuration = array();
+    $language_configuration = [];
     foreach ($entity_types as $entity_type_id => $entity_type) {
       if (!$entity_type instanceof ContentEntityTypeInterface || !$entity_type->hasKey('langcode') || !isset($bundles[$entity_type_id])) {
         continue;
@@ -76,65 +76,65 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     asort($labels);
 
-    $form = array(
+    $form = [
       '#labels' => $labels,
-      '#attached' => array(
-        'library' => array(
+      '#attached' => [
+        'library' => [
           'language/drupal.language.admin',
-        ),
-      ),
-      '#attributes' => array(
+        ],
+      ],
+      '#attributes' => [
         'class' => 'language-content-settings-form',
-      ),
-    );
+      ],
+    ];
 
-    $form['entity_types'] = array(
+    $form['entity_types'] = [
       '#title' => $this->t('Custom language settings'),
       '#type' => 'checkboxes',
       '#options' => $labels,
       '#default_value' => $default,
-    );
+    ];
 
-    $form['settings'] = array('#tree' => TRUE);
+    $form['settings'] = ['#tree' => TRUE];
 
     foreach ($labels as $entity_type_id => $label) {
       $entity_type = $entity_types[$entity_type_id];
 
-      $form['settings'][$entity_type_id] = array(
+      $form['settings'][$entity_type_id] = [
         '#title' => $label,
         '#type' => 'container',
         '#entity_type' => $entity_type_id,
         '#theme' => 'language_content_settings_table',
         '#bundle_label' => $entity_type->getBundleLabel() ?: $label,
-        '#states' => array(
-          'visible' => array(
-            ':input[name="entity_types[' . $entity_type_id . ']"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
+        '#states' => [
+          'visible' => [
+            ':input[name="entity_types[' . $entity_type_id . ']"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
 
       foreach ($bundles[$entity_type_id] as $bundle => $bundle_info) {
-        $form['settings'][$entity_type_id][$bundle]['settings'] = array(
+        $form['settings'][$entity_type_id][$bundle]['settings'] = [
           '#type' => 'item',
           '#label' => $bundle_info['label'],
-          'language' => array(
+          'language' => [
             '#type' => 'language_configuration',
-            '#entity_information' => array(
+            '#entity_information' => [
               'entity_type' => $entity_type_id,
               'bundle' => $bundle,
-            ),
+            ],
             '#default_value' => $language_configuration[$entity_type_id][$bundle],
-          ),
-        );
+          ],
+        ];
       }
     }
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save configuration'),
       '#button_type' => 'primary',
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/language/src/Form/LanguageAddForm.php b/core/modules/language/src/Form/LanguageAddForm.php
index ad5ed61aa6d32258470133c7fc289f9768430180..5b9f15c2e25af501a954531d36ca4809cb3dfa41 100644
--- a/core/modules/language/src/Form/LanguageAddForm.php
+++ b/core/modules/language/src/Form/LanguageAddForm.php
@@ -30,50 +30,50 @@ public function form(array $form, FormStateInterface $form_state) {
 
     $predefined_languages['custom'] = $this->t('Custom language...');
     $predefined_default = $form_state->getValue('predefined_langcode', key($predefined_languages));
-    $form['predefined_langcode'] = array(
+    $form['predefined_langcode'] = [
       '#type' => 'select',
       '#title' => $this->t('Language name'),
       '#default_value' => $predefined_default,
       '#options' => $predefined_languages,
-    );
-    $form['predefined_submit'] = array(
+    ];
+    $form['predefined_submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Add language'),
       '#name' => 'add_language',
-      '#limit_validation_errors' => array(array('predefined_langcode'), array('predefined_submit')),
-      '#states' => array(
-        'invisible' => array(
-          'select#edit-predefined-langcode' => array('value' => 'custom'),
-        ),
-      ),
-      '#validate' => array('::validatePredefined'),
-      '#submit' => array('::submitForm', '::save'),
+      '#limit_validation_errors' => [['predefined_langcode'], ['predefined_submit']],
+      '#states' => [
+        'invisible' => [
+          'select#edit-predefined-langcode' => ['value' => 'custom'],
+        ],
+      ],
+      '#validate' => ['::validatePredefined'],
+      '#submit' => ['::submitForm', '::save'],
       '#button_type' => 'primary',
-    );
+    ];
 
-    $custom_language_states_conditions = array(
-      'select#edit-predefined-langcode' => array('value' => 'custom'),
-    );
-    $form['custom_language'] = array(
+    $custom_language_states_conditions = [
+      'select#edit-predefined-langcode' => ['value' => 'custom'],
+    ];
+    $form['custom_language'] = [
       '#type' => 'container',
-      '#states' => array(
+      '#states' => [
         'visible' => $custom_language_states_conditions,
-      ),
-    );
+      ],
+    ];
     $this->commonForm($form['custom_language']);
-    $form['custom_language']['langcode']['#states'] = array(
+    $form['custom_language']['langcode']['#states'] = [
       'required' => $custom_language_states_conditions,
-    );
-    $form['custom_language']['label']['#states'] = array(
+    ];
+    $form['custom_language']['label']['#states'] = [
       'required' => $custom_language_states_conditions,
-    );
-    $form['custom_language']['submit'] = array(
+    ];
+    $form['custom_language']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Add custom language'),
       '#name' => 'add_custom_language',
-      '#validate' => array('::validateCustom'),
-      '#submit' => array('::submitForm', '::save'),
-    );
+      '#validate' => ['::validateCustom'],
+      '#submit' => ['::submitForm', '::save'],
+    ];
 
     return $form;
   }
@@ -84,14 +84,14 @@ public function form(array $form, FormStateInterface $form_state) {
   public function save(array $form, FormStateInterface $form_state) {
     parent::save($form, $form_state);
 
-    $t_args = array('%language' => $this->entity->label(), '%langcode' => $this->entity->id());
+    $t_args = ['%language' => $this->entity->label(), '%langcode' => $this->entity->id()];
     $this->logger('language')->notice('The %language (%langcode) language has been created.', $t_args);
     drupal_set_message($this->t('The language %language has been created and can now be used.', $t_args));
 
     if ($this->moduleHandler->moduleExists('block')) {
       // Tell the user they have the option to add a language switcher block
       // to their theme so they can switch between the languages.
-      drupal_set_message($this->t('Use one of the language switcher blocks to allow site visitors to switch between languages. You can enable these blocks on the <a href=":block-admin">block administration page</a>.', array(':block-admin' => $this->url('block.admin_display'))));
+      drupal_set_message($this->t('Use one of the language switcher blocks to allow site visitors to switch between languages. You can enable these blocks on the <a href=":block-admin">block administration page</a>.', [':block-admin' => $this->url('block.admin_display')]));
     }
     $form_state->setRedirectUrl($this->entity->urlInfo('collection'));
   }
@@ -101,7 +101,7 @@ public function save(array $form, FormStateInterface $form_state) {
    */
   public function actions(array $form, FormStateInterface $form_state) {
     // No actions needed.
-    return array();
+    return [];
   }
 
   /**
@@ -114,7 +114,7 @@ public function validateCustom(array $form, FormStateInterface $form_state) {
       $this->validateCommon($form['custom_language'], $form_state);
 
       if ($language = $this->languageManager->getLanguage($langcode)) {
-        $form_state->setErrorByName('langcode', $this->t('The language %language (%langcode) already exists.', array('%language' => $language->getName(), '%langcode' => $langcode)));
+        $form_state->setErrorByName('langcode', $this->t('The language %language (%langcode) already exists.', ['%language' => $language->getName(), '%langcode' => $langcode]));
       }
     }
     else {
@@ -132,7 +132,7 @@ public function validatePredefined($form, FormStateInterface $form_state) {
     }
     else {
       if ($language = $this->languageManager->getLanguage($langcode)) {
-        $form_state->setErrorByName('predefined_langcode', $this->t('The language %language (%langcode) already exists.', array('%language' => $language->getName(), '%langcode' => $langcode)));
+        $form_state->setErrorByName('predefined_langcode', $this->t('The language %language (%langcode) already exists.', ['%language' => $language->getName(), '%langcode' => $langcode]));
       }
     }
   }
diff --git a/core/modules/language/src/Form/LanguageDeleteForm.php b/core/modules/language/src/Form/LanguageDeleteForm.php
index d2226e8e13a09b8cdeee3ed4cc00d897c189c098..6113c1fe6b0facbba6fcb24d2086e834bb32e88f 100644
--- a/core/modules/language/src/Form/LanguageDeleteForm.php
+++ b/core/modules/language/src/Form/LanguageDeleteForm.php
@@ -27,14 +27,14 @@ public function getFormId() {
    * {@inheritdoc}
    */
   protected function getDeletionMessage() {
-    return $this->t('The %language (%langcode) language has been removed.', array('%language' => $this->entity->label(), '%langcode' => $this->entity->id()));
+    return $this->t('The %language (%langcode) language has been removed.', ['%language' => $this->entity->label(), '%langcode' => $this->entity->id()]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function logDeletionMessage() {
-    $this->logger('language')->notice('The %language (%langcode) language has been removed.', array('%language' => $this->entity->label(), '%langcode' => $this->entity->id()));
+    $this->logger('language')->notice('The %language (%langcode) language has been removed.', ['%language' => $this->entity->label(), '%langcode' => $this->entity->id()]);
   }
 
 }
diff --git a/core/modules/language/src/Form/LanguageEditForm.php b/core/modules/language/src/Form/LanguageEditForm.php
index bb0b7d76d1f029133c87feb5d77f1d9840d0283f..234994dbb4994b0e0283c86ef82a5b270bbc193e 100644
--- a/core/modules/language/src/Form/LanguageEditForm.php
+++ b/core/modules/language/src/Form/LanguageEditForm.php
@@ -29,12 +29,12 @@ public function form(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function actions(array $form, FormStateInterface $form_state) {
-    $actions['submit'] = array(
+    $actions['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save language'),
-      '#validate' => array('::validateCommon'),
-      '#submit' => array('::submitForm', '::save'),
-    );
+      '#validate' => ['::validateCommon'],
+      '#submit' => ['::submitForm', '::save'],
+    ];
     return $actions;
   }
 
@@ -44,7 +44,7 @@ public function actions(array $form, FormStateInterface $form_state) {
   public function save(array $form, FormStateInterface $form_state) {
     parent::save($form, $form_state);
     $form_state->setRedirectUrl($this->entity->urlInfo('collection'));
-    $this->logger('language')->notice('The %language (%langcode) language has been updated.', array('%language' => $this->entity->label(), '%langcode' => $this->entity->id()));
+    $this->logger('language')->notice('The %language (%langcode) language has been updated.', ['%language' => $this->entity->label(), '%langcode' => $this->entity->id()]);
   }
 
 }
diff --git a/core/modules/language/src/Form/LanguageFormBase.php b/core/modules/language/src/Form/LanguageFormBase.php
index 00771621bee427f0039758bc95fe321d22ba5b81..8c8f5fac69967aeca9c08ccdd9164eebb28dc65d 100644
--- a/core/modules/language/src/Form/LanguageFormBase.php
+++ b/core/modules/language/src/Form/LanguageFormBase.php
@@ -47,45 +47,45 @@ public function commonForm(array &$form) {
     /* @var $language \Drupal\language\ConfigurableLanguageInterface */
     $language = $this->entity;
     if ($language->getId()) {
-      $form['langcode_view'] = array(
+      $form['langcode_view'] = [
         '#type' => 'item',
         '#title' => $this->t('Language code'),
         '#markup' => $language->id()
-      );
-      $form['langcode'] = array(
+      ];
+      $form['langcode'] = [
         '#type' => 'value',
         '#value' => $language->id()
-      );
+      ];
     }
     else {
-      $form['langcode'] = array(
+      $form['langcode'] = [
         '#type' => 'textfield',
         '#title' => $this->t('Language code'),
         '#maxlength' => 12,
         '#required' => TRUE,
         '#default_value' => '',
         '#disabled' => FALSE,
-        '#description' => $this->t('Use language codes as <a href=":w3ctags">defined by the W3C</a> for interoperability. <em>Examples: "en", "en-gb" and "zh-hant".</em>', array(':w3ctags' => 'http://www.w3.org/International/articles/language-tags/')),
-      );
+        '#description' => $this->t('Use language codes as <a href=":w3ctags">defined by the W3C</a> for interoperability. <em>Examples: "en", "en-gb" and "zh-hant".</em>', [':w3ctags' => 'http://www.w3.org/International/articles/language-tags/']),
+      ];
     }
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Language name'),
       '#maxlength' => 64,
       '#default_value' => $language->label(),
       '#required' => TRUE,
-    );
-    $form['direction'] = array(
+    ];
+    $form['direction'] = [
       '#type' => 'radios',
       '#title' => $this->t('Direction'),
       '#required' => TRUE,
       '#description' => $this->t('Direction that text in this language is presented.'),
       '#default_value' => $language->getDirection(),
-      '#options' => array(
+      '#options' => [
         LanguageInterface::DIRECTION_LTR => $this->t('Left to right'),
         LanguageInterface::DIRECTION_RTL => $this->t('Right to left'),
-      ),
-    );
+      ],
+    ];
 
     return $form;
   }
@@ -96,13 +96,13 @@ public function commonForm(array &$form) {
   public function validateCommon(array $form, FormStateInterface $form_state) {
     // Ensure sane field values for langcode and name.
     if (!isset($form['langcode_view']) && !preg_match('@^[a-zA-Z]{1,8}(-[a-zA-Z0-9]{1,8})*$@', $form_state->getValue('langcode'))) {
-      $form_state->setErrorByName('langcode', $this->t('%field must be a valid language tag as <a href=":url">defined by the W3C</a>.', array(
+      $form_state->setErrorByName('langcode', $this->t('%field must be a valid language tag as <a href=":url">defined by the W3C</a>.', [
         '%field' => $form['langcode']['#title'],
         ':url' => 'http://www.w3.org/International/articles/language-tags/',
-      )));
+      ]));
     }
     if ($form_state->getValue('label') != Html::escape($form_state->getValue('label'))) {
-      $form_state->setErrorByName('label', $this->t('%field cannot contain any markup.', array('%field' => $form['label']['#title'])));
+      $form_state->setErrorByName('label', $this->t('%field cannot contain any markup.', ['%field' => $form['label']['#title']]));
     }
   }
 
diff --git a/core/modules/language/src/Form/NegotiationBrowserDeleteForm.php b/core/modules/language/src/Form/NegotiationBrowserDeleteForm.php
index df5052c08522952cc9268323a3b9447480609306..1a409462fd4e226acd54ac608f67902ad122db7f 100644
--- a/core/modules/language/src/Form/NegotiationBrowserDeleteForm.php
+++ b/core/modules/language/src/Form/NegotiationBrowserDeleteForm.php
@@ -32,7 +32,7 @@ protected function getEditableConfigNames() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to delete %browser_langcode?', array('%browser_langcode' => $this->browserLangcode));
+    return $this->t('Are you sure you want to delete %browser_langcode?', ['%browser_langcode' => $this->browserLangcode]);
   }
 
   /**
@@ -68,9 +68,9 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       ->clear('map.' . $this->browserLangcode)
       ->save();
 
-    $args = array(
+    $args = [
       '%browser' => $this->browserLangcode,
-    );
+    ];
 
     $this->logger('language')->notice('The browser language detection mapping for the %browser browser language code has been deleted.', $args);
 
diff --git a/core/modules/language/src/Form/NegotiationBrowserForm.php b/core/modules/language/src/Form/NegotiationBrowserForm.php
index dfbdabbebea68648ba90b92e8783c8918d429115..5535fe07d0be13aba04586c7cb576138767554a2 100644
--- a/core/modules/language/src/Form/NegotiationBrowserForm.php
+++ b/core/modules/language/src/Form/NegotiationBrowserForm.php
@@ -60,12 +60,12 @@ protected function getEditableConfigNames() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form = array();
+    $form = [];
 
     // Initialize a language list to the ones available, including English.
     $languages = $this->languageManager->getLanguages();
 
-    $existing_languages = array();
+    $existing_languages = [];
     foreach ($languages as $langcode => $language) {
       $existing_languages[$langcode] = $language->getName();
     }
@@ -77,10 +77,10 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       $language_options = $this->languageManager->getStandardLanguageListWithoutConfigured();
     }
     else {
-      $language_options = array(
+      $language_options = [
         (string) $this->t('Existing languages') => $existing_languages,
         (string) $this->t('Languages not yet added') => $this->languageManager->getStandardLanguageListWithoutConfigured(),
-      );
+      ];
     }
 
     $form['mappings'] = [
@@ -96,24 +96,24 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     $mappings = $this->language_get_browser_drupal_langcode_mappings();
     foreach ($mappings as $browser_langcode => $drupal_langcode) {
-      $form['mappings'][$browser_langcode] = array(
-        'browser_langcode' => array(
+      $form['mappings'][$browser_langcode] = [
+        'browser_langcode' => [
           '#title' => $this->t('Browser language code'),
           '#title_display' => 'invisible',
           '#type' => 'textfield',
           '#default_value' => $browser_langcode,
           '#size' => 20,
           '#required' => TRUE,
-        ),
-        'drupal_langcode' => array(
+        ],
+        'drupal_langcode' => [
           '#title' => $this->t('Site language'),
           '#title_display' => 'invisible',
           '#type' => 'select',
           '#options' => $language_options,
           '#default_value' => $drupal_langcode,
           '#required' => TRUE,
-        ),
-      );
+        ],
+      ];
       // Operations column.
       $form['mappings'][$browser_langcode]['operations'] = [
         '#type' => 'operations',
@@ -126,22 +126,22 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     // Add empty row.
-    $form['new_mapping'] = array(
+    $form['new_mapping'] = [
       '#type' => 'details',
       '#title' => $this->t('Add a new mapping'),
       '#tree' => TRUE,
-    );
-    $form['new_mapping']['browser_langcode'] = array(
+    ];
+    $form['new_mapping']['browser_langcode'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Browser language code'),
-      '#description' => $this->t('Use language codes as <a href=":w3ctags">defined by the W3C</a> for interoperability. <em>Examples: "en", "en-gb" and "zh-hant".</em>', array(':w3ctags' => 'http://www.w3.org/International/articles/language-tags/')),
+      '#description' => $this->t('Use language codes as <a href=":w3ctags">defined by the W3C</a> for interoperability. <em>Examples: "en", "en-gb" and "zh-hant".</em>', [':w3ctags' => 'http://www.w3.org/International/articles/language-tags/']),
       '#size' => 20,
-    );
-    $form['new_mapping']['drupal_langcode'] = array(
+    ];
+    $form['new_mapping']['drupal_langcode'] = [
       '#type' => 'select',
       '#title' => $this->t('Site language'),
       '#options' => $language_options,
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
@@ -151,7 +151,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    */
   public function validateForm(array &$form, FormStateInterface $form_state) {
     // Array to check if all browser language codes are unique.
-    $unique_values = array();
+    $unique_values = [];
 
     // Check all mappings.
     if ($form_state->hasValue('mappings')) {
@@ -207,7 +207,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
   protected function language_get_browser_drupal_langcode_mappings() {
     $config = $this->config('language.mappings');
     if ($config->isNew()) {
-      return array();
+      return [];
     }
     return $config->get('map');
   }
diff --git a/core/modules/language/src/Form/NegotiationConfigureForm.php b/core/modules/language/src/Form/NegotiationConfigureForm.php
index 41f57a32f6670e47e77fafa8248f10d83780e274..c1333e6a27a8b6874e218e824744449d1c0dfda3 100644
--- a/core/modules/language/src/Form/NegotiationConfigureForm.php
+++ b/core/modules/language/src/Form/NegotiationConfigureForm.php
@@ -124,12 +124,12 @@ protected function getEditableConfigNames() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $configurable = $this->languageTypes->get('configurable');
 
-    $form = array(
+    $form = [
       '#theme' => 'language_negotiation_configure_form',
       '#language_types_info' => $this->languageManager->getDefinedLanguageTypesInfo(),
       '#language_negotiation_info' => $this->negotiator->getNegotiationMethods(),
-    );
-    $form['#language_types'] = array();
+    ];
+    $form['#language_types'] = [];
 
     foreach ($form['#language_types_info'] as $type => $info) {
       // Show locked language types only if they are configurable.
@@ -142,12 +142,12 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       $this->configureFormTable($form, $type);
     }
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#button_type' => 'primary',
       '#value' => $this->t('Save settings'),
-    );
+    ];
 
     return $form;
   }
@@ -159,17 +159,17 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $configurable_types = $form['#language_types'];
 
     $stored_values = $this->languageTypes->get('configurable');
-    $customized = array();
-    $method_weights_type = array();
+    $customized = [];
+    $method_weights_type = [];
 
     foreach ($configurable_types as $type) {
       $customized[$type] = in_array($type, $stored_values);
-      $method_weights = array();
-      $enabled_methods = $form_state->getValue(array($type, 'enabled'));
+      $method_weights = [];
+      $enabled_methods = $form_state->getValue([$type, 'enabled']);
       $enabled_methods[LanguageNegotiationSelected::METHOD_ID] = TRUE;
-      $method_weights_input = $form_state->getValue(array($type, 'weight'));
-      if ($form_state->hasValue(array($type, 'configurable'))) {
-        $customized[$type] = !$form_state->isValueEmpty(array($type, 'configurable'));
+      $method_weights_input = $form_state->getValue([$type, 'weight']);
+      if ($form_state->hasValue([$type, 'configurable'])) {
+        $customized[$type] = !$form_state->isValueEmpty([$type, 'configurable']);
       }
 
       foreach ($method_weights_input as $method_id => $weight) {
@@ -216,33 +216,33 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
   protected function configureFormTable(array &$form, $type)  {
     $info = $form['#language_types_info'][$type];
 
-    $table_form = array(
-      '#title' => $this->t('@type language detection', array('@type' => $info['name'])),
+    $table_form = [
+      '#title' => $this->t('@type language detection', ['@type' => $info['name']]),
       '#tree' => TRUE,
       '#description' => $info['description'],
-      '#language_negotiation_info' => array(),
+      '#language_negotiation_info' => [],
       '#show_operations' => FALSE,
-      'weight' => array('#tree' => TRUE),
-    );
+      'weight' => ['#tree' => TRUE],
+    ];
     // Only show configurability checkbox for the unlocked language types.
     if (empty($info['locked'])) {
       $configurable = $this->languageTypes->get('configurable');
-      $table_form['configurable'] = array(
+      $table_form['configurable'] = [
         '#type' => 'checkbox',
-        '#title' => $this->t('Customize %language_name language detection to differ from Interface text language detection settings', array('%language_name' => $info['name'])),
+        '#title' => $this->t('Customize %language_name language detection to differ from Interface text language detection settings', ['%language_name' => $info['name']]),
         '#default_value' => in_array($type, $configurable),
-        '#attributes' => array('class' => array('language-customization-checkbox')),
-        '#attached' => array(
-          'library' => array(
+        '#attributes' => ['class' => ['language-customization-checkbox']],
+        '#attached' => [
+          'library' => [
             'language/drupal.language.admin'
-          ),
-        ),
-      );
+          ],
+        ],
+      ];
     }
 
     $negotiation_info = $form['#language_negotiation_info'];
-    $enabled_methods = $this->languageTypes->get('negotiation.' . $type . '.enabled') ?: array();
-    $methods_weight = $this->languageTypes->get('negotiation.' . $type . '.method_weights') ?: array();
+    $enabled_methods = $this->languageTypes->get('negotiation.' . $type . '.enabled') ?: [];
+    $methods_weight = $this->languageTypes->get('negotiation.' . $type . '.method_weights') ?: [];
 
     // Add missing data to the methods lists.
     foreach ($negotiation_info as $method_id => $method) {
@@ -272,44 +272,44 @@ protected function configureFormTable(array &$form, $type)  {
         $table_form['#language_negotiation_info'][$method_id] = $method;
         $method_name = $method['name'];
 
-        $table_form['weight'][$method_id] = array(
+        $table_form['weight'][$method_id] = [
           '#type' => 'weight',
-          '#title' => $this->t('Weight for @title language detection method', array('@title' => Unicode::strtolower($method_name))),
+          '#title' => $this->t('Weight for @title language detection method', ['@title' => Unicode::strtolower($method_name)]),
           '#title_display' => 'invisible',
           '#default_value' => $weight,
-          '#attributes' => array('class' => array("language-method-weight-$type")),
+          '#attributes' => ['class' => ["language-method-weight-$type"]],
           '#delta' => 20,
-        );
+        ];
 
-        $table_form['title'][$method_id] = array('#plain_text' => $method_name);
+        $table_form['title'][$method_id] = ['#plain_text' => $method_name];
 
-        $table_form['enabled'][$method_id] = array(
+        $table_form['enabled'][$method_id] = [
           '#type' => 'checkbox',
-          '#title' => $this->t('Enable @title language detection method', array('@title' => Unicode::strtolower($method_name))),
+          '#title' => $this->t('Enable @title language detection method', ['@title' => Unicode::strtolower($method_name)]),
           '#title_display' => 'invisible',
           '#default_value' => $enabled,
-        );
+        ];
         if ($method_id === LanguageNegotiationSelected::METHOD_ID) {
           $table_form['enabled'][$method_id]['#default_value'] = TRUE;
-          $table_form['enabled'][$method_id]['#attributes'] = array('disabled' => 'disabled');
+          $table_form['enabled'][$method_id]['#attributes'] = ['disabled' => 'disabled'];
         }
 
-        $table_form['description'][$method_id] = array('#markup' => $method['description']);
+        $table_form['description'][$method_id] = ['#markup' => $method['description']];
 
-        $config_op = array();
+        $config_op = [];
         if (isset($method['config_route_name'])) {
-          $config_op['configure'] = array(
+          $config_op['configure'] = [
             'title' => $this->t('Configure'),
             'url' => Url::fromRoute($method['config_route_name']),
-          );
+          ];
           // If there is at least one operation enabled show the operation
           // column.
           $table_form['#show_operations'] = TRUE;
         }
-        $table_form['operation'][$method_id] = array(
+        $table_form['operation'][$method_id] = [
          '#type' => 'operations',
          '#links' => $config_op,
-        );
+        ];
       }
     }
     $form[$type] = $table_form;
@@ -324,7 +324,7 @@ protected function configureFormTable(array &$form, $type)  {
    */
   protected function disableLanguageSwitcher(array $language_types) {
     $theme = $this->themeHandler->getDefault();
-    $blocks = $this->blockStorage->loadByProperties(array('theme' => $theme));
+    $blocks = $this->blockStorage->loadByProperties(['theme' => $theme]);
     foreach ($language_types as $language_type) {
       foreach ($blocks as $block) {
         if ($block->getPluginId() == 'language_block:' . $language_type) {
diff --git a/core/modules/language/src/Form/NegotiationSelectedForm.php b/core/modules/language/src/Form/NegotiationSelectedForm.php
index bba40ee87eb2549b0bbfecb18dd52e93357dada6..d4f1191862bd640b3b0eef3274fdd427c9803828 100644
--- a/core/modules/language/src/Form/NegotiationSelectedForm.php
+++ b/core/modules/language/src/Form/NegotiationSelectedForm.php
@@ -30,12 +30,12 @@ protected function getEditableConfigNames() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('language.negotiation');
-    $form['selected_langcode'] = array(
+    $form['selected_langcode'] = [
       '#type' => 'language_select',
       '#title' => $this->t('Language'),
       '#languages' => LanguageInterface::STATE_CONFIGURABLE | LanguageInterface::STATE_SITE_DEFAULT,
       '#default_value' => $config->get('selected_langcode'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/language/src/Form/NegotiationSessionForm.php b/core/modules/language/src/Form/NegotiationSessionForm.php
index 2e944727160b050862e9ffdeeb0a14adb8833b06..b7ec4508f54143b39f0bf1be0144241cf62bb763 100644
--- a/core/modules/language/src/Form/NegotiationSessionForm.php
+++ b/core/modules/language/src/Form/NegotiationSessionForm.php
@@ -29,12 +29,12 @@ protected function getEditableConfigNames() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('language.negotiation');
-    $form['language_negotiation_session_param'] = array(
+    $form['language_negotiation_session_param'] = [
       '#title' => $this->t('Request/session parameter'),
       '#type' => 'textfield',
       '#default_value' => $config->get('session.parameter'),
       '#description' => $this->t('Name of the request/session parameter used to determine the desired language.'),
-    );
+    ];
 
     $form_state->setRedirect('language.negotiation');
 
diff --git a/core/modules/language/src/Form/NegotiationUrlForm.php b/core/modules/language/src/Form/NegotiationUrlForm.php
index d5ad8639e0fa562fde5589c97da98fdb7c57b014..6f44f60203314ec6993d6cbdc2abeca8fd9cc2d2 100644
--- a/core/modules/language/src/Form/NegotiationUrlForm.php
+++ b/core/modules/language/src/Form/NegotiationUrlForm.php
@@ -66,63 +66,63 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     global $base_url;
     $config = $this->config('language.negotiation');
 
-    $form['language_negotiation_url_part'] = array(
+    $form['language_negotiation_url_part'] = [
       '#title' => $this->t('Part of the URL that determines language'),
       '#type' => 'radios',
-      '#options' => array(
+      '#options' => [
         LanguageNegotiationUrl::CONFIG_PATH_PREFIX => $this->t('Path prefix'),
         LanguageNegotiationUrl::CONFIG_DOMAIN => $this->t('Domain'),
-      ),
+      ],
       '#default_value' => $config->get('url.source'),
-    );
+    ];
 
-    $form['prefix'] = array(
+    $form['prefix'] = [
       '#type' => 'details',
       '#tree' => TRUE,
       '#title' => $this->t('Path prefix configuration'),
       '#open' => TRUE,
       '#description' => $this->t('Language codes or other custom text to use as a path prefix for URL language detection. For the selected fallback language, this value may be left blank. <strong>Modifying this value may break existing URLs. Use with caution in a production environment.</strong> Example: Specifying "deutsch" as the path prefix code for German results in URLs like "example.com/deutsch/contact".'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="language_negotiation_url_part"]' => array(
+      '#states' => [
+        'visible' => [
+          ':input[name="language_negotiation_url_part"]' => [
             'value' => (string) LanguageNegotiationUrl::CONFIG_PATH_PREFIX,
-          ),
-        ),
-      ),
-    );
-    $form['domain'] = array(
+          ],
+        ],
+      ],
+    ];
+    $form['domain'] = [
       '#type' => 'details',
       '#tree' => TRUE,
       '#title' => $this->t('Domain configuration'),
       '#open' => TRUE,
       '#description' => $this->t('The domain names to use for these languages. <strong>Modifying this value may break existing URLs. Use with caution in a production environment.</strong> Example: Specifying "de.example.com" as language domain for German will result in a URL like "http://de.example.com/contact".'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="language_negotiation_url_part"]' => array(
+      '#states' => [
+        'visible' => [
+          ':input[name="language_negotiation_url_part"]' => [
             'value' => (string) LanguageNegotiationUrl::CONFIG_DOMAIN,
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
 
     $languages = $this->languageManager->getLanguages();
     $prefixes = $config->get('url.prefixes');
     $domains = $config->get('url.domains');
     foreach ($languages as $langcode => $language) {
-      $t_args = array('%language' => $language->getName(), '%langcode' => $language->getId());
-      $form['prefix'][$langcode] = array(
+      $t_args = ['%language' => $language->getName(), '%langcode' => $language->getId()];
+      $form['prefix'][$langcode] = [
         '#type' => 'textfield',
         '#title' => $language->isDefault() ? $this->t('%language (%langcode) path prefix (Default language)', $t_args) : $this->t('%language (%langcode) path prefix', $t_args),
         '#maxlength' => 64,
         '#default_value' => isset($prefixes[$langcode]) ? $prefixes[$langcode] : '',
         '#field_prefix' => $base_url . '/',
-      );
-      $form['domain'][$langcode] = array(
+      ];
+      $form['domain'][$langcode] = [
         '#type' => 'textfield',
-        '#title' => $this->t('%language (%langcode) domain', array('%language' => $language->getName(), '%langcode' => $language->getId())),
+        '#title' => $this->t('%language (%langcode) domain', ['%language' => $language->getName(), '%langcode' => $language->getId()]),
         '#maxlength' => 128,
         '#default_value' => isset($domains[$langcode]) ? $domains[$langcode] : '',
-      );
+      ];
     }
 
     $form_state->setRedirect('language.negotiation');
@@ -143,7 +143,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
       $default_langcode = $this->languageManager->getDefaultLanguage()->getId();
     }
     foreach ($languages as $langcode => $language) {
-      $value = $form_state->getValue(array('prefix', $langcode));
+      $value = $form_state->getValue(['prefix', $langcode]);
       if ($value === '') {
         if (!($default_langcode == $langcode) && $form_state->getValue('language_negotiation_url_part') == LanguageNegotiationUrl::CONFIG_PATH_PREFIX) {
           // Throw a form error if the prefix is blank for a non-default language,
@@ -161,35 +161,35 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
       elseif (isset($count[$value]) && $count[$value] > 1) {
         // Throw a form error if there are two languages with the same
         // domain/prefix.
-        $form_state->setErrorByName("prefix][$langcode", $this->t('The prefix for %language, %value, is not unique.', array('%language' => $language->getName(), '%value' => $value)));
+        $form_state->setErrorByName("prefix][$langcode", $this->t('The prefix for %language, %value, is not unique.', ['%language' => $language->getName(), '%value' => $value]));
       }
     }
 
     // Count repeated values for uniqueness check.
     $count = array_count_values($form_state->getValue('domain'));
     foreach ($languages as $langcode => $language) {
-      $value = $form_state->getValue(array('domain', $langcode));
+      $value = $form_state->getValue(['domain', $langcode]);
 
       if ($value === '') {
         if ($form_state->getValue('language_negotiation_url_part') == LanguageNegotiationUrl::CONFIG_DOMAIN) {
           // Throw a form error if the domain is blank for a non-default language,
           // although it is required for selected negotiation type.
-          $form_state->setErrorByName("domain][$langcode", $this->t('The domain may not be left blank for %language.', array('%language' => $language->getName())));
+          $form_state->setErrorByName("domain][$langcode", $this->t('The domain may not be left blank for %language.', ['%language' => $language->getName()]));
         }
       }
       elseif (isset($count[$value]) && $count[$value] > 1) {
         // Throw a form error if there are two languages with the same
         // domain/domain.
-        $form_state->setErrorByName("domain][$langcode", $this->t('The domain for %language, %value, is not unique.', array('%language' => $language->getName(), '%value' => $value)));
+        $form_state->setErrorByName("domain][$langcode", $this->t('The domain for %language, %value, is not unique.', ['%language' => $language->getName(), '%value' => $value]));
       }
     }
 
     // Domain names should not contain protocol and/or ports.
     foreach ($languages as $langcode => $language) {
-      $value = $form_state->getValue(array('domain', $langcode));
+      $value = $form_state->getValue(['domain', $langcode]);
       if (!empty($value)) {
         // Ensure we have exactly one protocol when checking the hostname.
-        $host = 'http://' . str_replace(array('http://', 'https://'), '', $value);
+        $host = 'http://' . str_replace(['http://', 'https://'], '', $value);
         if (parse_url($host, PHP_URL_HOST) != $value) {
           $form_state->setErrorByName("domain][$langcode", $this->t('The domain for %language may only contain the domain name, not a trailing slash, protocol and/or port.', ['%language' => $language->getName()]));
         }
diff --git a/core/modules/language/src/HttpKernel/PathProcessorLanguage.php b/core/modules/language/src/HttpKernel/PathProcessorLanguage.php
index 2e91305e9a129bb6757ae4224b616c9ae71ea154..c4af20c71ed8a609910be6729f0492b287fd6921 100644
--- a/core/modules/language/src/HttpKernel/PathProcessorLanguage.php
+++ b/core/modules/language/src/HttpKernel/PathProcessorLanguage.php
@@ -102,7 +102,7 @@ public function processInbound($path, Request $request) {
   /**
    * {@inheritdoc}
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
     if (!isset($this->multilingual)) {
       $this->multilingual = $this->languageManager->isMultilingual();
     }
@@ -131,7 +131,7 @@ public function processOutbound($path, &$options = array(), Request $request = N
    */
   protected function initProcessors($scope) {
     $interface = '\Drupal\Core\PathProcessor\\' . Unicode::ucfirst($scope) . 'PathProcessorInterface';
-    $this->processors[$scope] = array();
+    $this->processors[$scope] = [];
     $weights = [];
     foreach ($this->languageManager->getLanguageTypes() as $type) {
       foreach ($this->negotiator->getNegotiationMethods($type) as $method_id => $method) {
@@ -174,7 +174,7 @@ public function initConfigSubscriber() {
    * Resets the collected processors instances.
    */
   public function reset() {
-    $this->processors = array();
+    $this->processors = [];
   }
 
 }
diff --git a/core/modules/language/src/LanguageListBuilder.php b/core/modules/language/src/LanguageListBuilder.php
index 5d69f1ff9c2a7275a99c5b0447f98444457558b3..8d1515220434485e61ee8533fcb4c79e4936be7b 100644
--- a/core/modules/language/src/LanguageListBuilder.php
+++ b/core/modules/language/src/LanguageListBuilder.php
@@ -71,11 +71,11 @@ public function __construct(EntityTypeInterface $entity_type, EntityStorageInter
    * {@inheritdoc}
    */
   public function load() {
-    $entities = $this->storage->loadByProperties(array('locked' => FALSE));
+    $entities = $this->storage->loadByProperties(['locked' => FALSE]);
 
     // Sort the entities using the entity class's sort() method.
     // See \Drupal\Core\Config\Entity\ConfigEntityBase::sort().
-    uasort($entities, array($this->entityType->getClass(), 'sort'));
+    uasort($entities, [$this->entityType->getClass(), 'sort']);
     return $entities;
   }
 
@@ -90,10 +90,10 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildHeader() {
-    $header = array(
+    $header = [
         'label' => t('Name'),
         'default' => t('Default'),
-      ) + parent::buildHeader();
+      ] + parent::buildHeader();
     return $header;
   }
 
@@ -102,14 +102,14 @@ public function buildHeader() {
    */
   public function buildRow(EntityInterface $entity) {
     $row['label'] = $entity->label();
-    $row['default'] = array(
+    $row['default'] = [
       '#type' => 'radio',
-      '#parents' => array('site_default_language'),
-      '#title' => t('Set @title as default', array('@title' => $entity->label())),
+      '#parents' => ['site_default_language'],
+      '#title' => t('Set @title as default', ['@title' => $entity->label()]),
       '#title_display' => 'invisible',
       '#return_value' => $entity->id(),
       '#id' => 'edit-site-default-language-' . $entity->id(),
-    );
+    ];
     // Mark the right language as default in the form.
     if ($entity->id() == $this->languageManager->getDefaultLanguage()->getId()) {
       $row['default']['#default_value'] = $entity->id();
@@ -157,7 +157,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     drupal_set_message(t('Configuration saved.'));
     // Force the redirection to the page with the language we have just
     // selected as default.
-    $form_state->setRedirectUrl($this->entities[$new_id]->urlInfo('collection', array('language' => $this->entities[$new_id])));
+    $form_state->setRedirectUrl($this->entities[$new_id]->urlInfo('collection', ['language' => $this->entities[$new_id]]));
   }
 
 }
diff --git a/core/modules/language/src/LanguageNegotiator.php b/core/modules/language/src/LanguageNegotiator.php
index 2ae9032973aa9a5faff4f333753ab374cf4bda50..d9d4c5deca847b5c44703fffc423f371a8dd4c67 100644
--- a/core/modules/language/src/LanguageNegotiator.php
+++ b/core/modules/language/src/LanguageNegotiator.php
@@ -68,7 +68,7 @@ class LanguageNegotiator implements LanguageNegotiatorInterface {
    *
    * @var \Drupal\Core\Language\LanguageInterface[]
    */
-  protected $negotiatedLanguages = array();
+  protected $negotiatedLanguages = [];
 
   /**
    * Constructs a new LanguageNegotiator object.
@@ -105,8 +105,8 @@ public function initLanguageManager() {
    * {@inheritdoc}
    */
   public function reset() {
-    $this->negotiatedLanguages = array();
-    $this->methods = array();
+    $this->negotiatedLanguages = [];
+    $this->methods = [];
   }
 
   /**
@@ -150,7 +150,7 @@ public function initializeType($type) {
       $method_id = static::METHOD_ID;
     }
 
-    return array($method_id => $language);
+    return [$method_id => $language];
   }
 
   /**
@@ -163,7 +163,7 @@ public function initializeType($type) {
    *   An array of enabled detection methods for the provided language type.
    */
   protected function getEnabledNegotiators($type) {
-    return $this->configFactory->get('language.types')->get('negotiation.' . $type . '.enabled') ?: array();
+    return $this->configFactory->get('language.types')->get('negotiation.' . $type . '.enabled') ?: [];
   }
 
   /**
@@ -207,7 +207,7 @@ public function getNegotiationMethods($type = NULL) {
    */
   public function getNegotiationMethodInstance($method_id) {
     if (!isset($this->methods[$method_id])) {
-      $instance = $this->negotiatorManager->createInstance($method_id, array());
+      $instance = $this->negotiatorManager->createInstance($method_id, []);
       $instance->setLanguageManager($this->languageManager);
       $instance->setConfig($this->configFactory);
       $instance->setCurrentUser($this->currentUser);
@@ -229,7 +229,7 @@ public function getPrimaryNegotiationMethod($type) {
    */
   public function isNegotiationMethodEnabled($method_id, $type = NULL) {
     $enabled = FALSE;
-    $language_types = !empty($type) ? array($type) : $this->languageManager->getLanguageTypes();
+    $language_types = !empty($type) ? [$type] : $this->languageManager->getLanguageTypes();
 
     foreach ($language_types as $type) {
       $enabled_methods = $this->getEnabledNegotiators($type);
@@ -297,7 +297,7 @@ function updateConfiguration(array $types) {
     $this->negotiatorManager->clearCachedDefinitions();
     $this->languageManager->reset();
 
-    $language_types = array();
+    $language_types = [];
     $language_types_info = $this->languageManager->getDefinedLanguageTypesInfo();
     $method_definitions = $this->getNegotiationMethods();
 
@@ -316,7 +316,7 @@ function updateConfiguration(array $types) {
           // default language negotiation settings, we use the values
           // negotiated for the interface language which, should always be
           // available.
-          $method_weights = array(LanguageNegotiationUI::METHOD_ID);
+          $method_weights = [LanguageNegotiationUI::METHOD_ID];
           $method_weights = array_flip($method_weights);
           $this->saveConfiguration($type, $method_weights);
         }
@@ -330,7 +330,7 @@ function updateConfiguration(array $types) {
         // If the language type is locked we can just store its default language
         // negotiation settings if it has some, since it is not configurable.
         if ($has_default_settings) {
-          $method_weights = array();
+          $method_weights = [];
           // Default settings are in $info['fixed'].
 
           foreach ($info['fixed'] as $weight => $method_id) {
@@ -351,10 +351,10 @@ function updateConfiguration(array $types) {
     }
 
     // Store the language type configuration.
-    $config = array(
+    $config = [
       'configurable' => array_keys(array_filter($language_types)),
       'all' => array_keys($language_types),
-    );
+    ];
     $this->languageManager->saveLanguageTypesConfiguration($config);
   }
 
diff --git a/core/modules/language/src/LanguageServiceProvider.php b/core/modules/language/src/LanguageServiceProvider.php
index 2d2004f51d9cc6949c21febaabd34186f619f0cd..4060f75d371e10668f82cb781ddf3c8dc24ebeba 100644
--- a/core/modules/language/src/LanguageServiceProvider.php
+++ b/core/modules/language/src/LanguageServiceProvider.php
@@ -29,8 +29,8 @@ public function register(ContainerBuilder $container) {
         ->addArgument(new Reference('current_user'));
 
       $container->register('path_processor_language', 'Drupal\language\HttpKernel\PathProcessorLanguage')
-        ->addTag('path_processor_inbound', array('priority' => 300))
-        ->addTag('path_processor_outbound', array('priority' => 100))
+        ->addTag('path_processor_inbound', ['priority' => 300])
+        ->addTag('path_processor_outbound', ['priority' => 100])
         ->addArgument(new Reference('config.factory'))
         ->addArgument(new Reference('language_manager'))
         ->addArgument(new Reference('language_negotiator'))
diff --git a/core/modules/language/src/Plugin/Block/LanguageBlock.php b/core/modules/language/src/Plugin/Block/LanguageBlock.php
index 5c58ac00aeb301950b6a6ce3439f65e85d9941ee..8e7ee918d50bd59137081bb07a0cea9d527e6e5b 100644
--- a/core/modules/language/src/Plugin/Block/LanguageBlock.php
+++ b/core/modules/language/src/Plugin/Block/LanguageBlock.php
@@ -84,22 +84,22 @@ protected function blockAccess(AccountInterface $account) {
    * {@inheritdoc}
    */
   public function build() {
-    $build = array();
+    $build = [];
     $route_name = $this->pathMatcher->isFrontPage() ? '<front>' : '<current>';
     $type = $this->getDerivativeId();
     $links = $this->languageManager->getLanguageSwitchLinks($type, Url::fromRoute($route_name));
 
     if (isset($links->links)) {
-      $build = array(
+      $build = [
         '#theme' => 'links__language_block',
         '#links' => $links->links,
-        '#attributes' => array(
-          'class' => array(
+        '#attributes' => [
+          'class' => [
             "language-switcher-{$links->method_id}",
-          ),
-        ),
+          ],
+        ],
         '#set_active_class' => TRUE,
-      );
+      ];
     }
     return $build;
   }
diff --git a/core/modules/language/src/Plugin/Condition/Language.php b/core/modules/language/src/Plugin/Condition/Language.php
index d1f3c95cec46fff9d96062b04d04544932a451ca..a5b3d41e8c1794cbe38e3d0015742f028ae34752 100644
--- a/core/modules/language/src/Plugin/Condition/Language.php
+++ b/core/modules/language/src/Plugin/Condition/Language.php
@@ -68,23 +68,23 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     if ($this->languageManager->isMultilingual()) {
       // Fetch languages.
       $languages = $this->languageManager->getLanguages();
-      $langcodes_options = array();
+      $langcodes_options = [];
       foreach ($languages as $language) {
         $langcodes_options[$language->getId()] = $language->getName();
       }
-      $form['langcodes'] = array(
+      $form['langcodes'] = [
         '#type' => 'checkboxes',
         '#title' => $this->t('Language selection'),
         '#default_value' => $this->configuration['langcodes'],
         '#options' => $langcodes_options,
         '#description' => $this->t('Select languages to enforce. If none are selected, all languages will be allowed.'),
-      );
+      ];
     }
     else {
-      $form['langcodes'] = array(
+      $form['langcodes'] = [
         '#type' => 'value',
         '#default_value' => $this->configuration['langcodes'],
-      );
+      ];
     }
     return parent::buildConfigurationForm($form, $form_state);
   }
@@ -111,7 +111,7 @@ public function summary() {
         $result[$item->getId()] = $item->getName();
       }
       return $result;
-    }, array());
+    }, []);
 
     // If we have more than one language selected, separate them by commas.
     if (count($this->configuration['langcodes']) > 1) {
@@ -122,9 +122,9 @@ public function summary() {
       $languages = array_pop($language_names);
     }
     if (!empty($this->configuration['negate'])) {
-      return t('The language is not @languages.', array('@languages' => $languages));
+      return t('The language is not @languages.', ['@languages' => $languages]);
     }
-    return t('The language is @languages.', array('@languages' => $languages));
+    return t('The language is @languages.', ['@languages' => $languages]);
   }
 
   /**
@@ -144,7 +144,7 @@ public function evaluate() {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array('langcodes' => array()) + parent::defaultConfiguration();
+    return ['langcodes' => []] + parent::defaultConfiguration();
   }
 
 }
diff --git a/core/modules/language/src/Plugin/Derivative/LanguageBlock.php b/core/modules/language/src/Plugin/Derivative/LanguageBlock.php
index 3c108695d00c785379488567320293c3f0a47d3e..93cc5b1c98ef6a3a3168502dac8f31993782858f 100644
--- a/core/modules/language/src/Plugin/Derivative/LanguageBlock.php
+++ b/core/modules/language/src/Plugin/Derivative/LanguageBlock.php
@@ -21,7 +21,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
       $configurable_types = $language_manager->getLanguageTypes();
       foreach ($configurable_types as $type) {
         $this->derivatives[$type] = $base_plugin_definition;
-        $this->derivatives[$type]['admin_label'] = t('Language switcher (@type)', array('@type' => $info[$type]['name']));
+        $this->derivatives[$type]['admin_label'] = t('Language switcher (@type)', ['@type' => $info[$type]['name']]);
       }
       // If there is just one configurable type then change the title of the
       // block.
diff --git a/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php
index 6c83e41f6b5445699a85525d02801b16ed2489d8..971e907aae307f73921cd7eca1f5bd7802230a52 100644
--- a/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php
+++ b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php
@@ -81,7 +81,7 @@ public function persist(LanguageInterface $language) {
   /**
    * {@inheritdoc}
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
     if ($request) {
       // The following values are not supposed to change during a single page
       // request processing.
@@ -124,24 +124,24 @@ public function processOutbound($path, &$options = array(), Request $request = N
    * {@inheritdoc}
    */
   public function getLanguageSwitchLinks(Request $request, $type, Url $url) {
-    $links = array();
+    $links = [];
     $config = $this->config->get('language.negotiation')->get('session');
     $param = $config['parameter'];
     $language_query = isset($_SESSION[$param]) ? $_SESSION[$param] : $this->languageManager->getCurrentLanguage($type)->getId();
-    $query = array();
+    $query = [];
     parse_str($request->getQueryString(), $query);
 
     foreach ($this->languageManager->getNativeLanguages() as $language) {
       $langcode = $language->getId();
-      $links[$langcode] = array(
+      $links[$langcode] = [
         // We need to clone the $url object to avoid using the same one for all
         // links. When the links are rendered, options are set on the $url
         // object, so if we use the same one, they would be set for all links.
         'url' => clone $url,
         'title' => $language->getName(),
-        'attributes' => array('class' => array('language-link')),
+        'attributes' => ['class' => ['language-link']],
         'query' => $query,
-      );
+      ];
       if ($language_query != $langcode) {
         $links[$langcode]['query'][$param] = $langcode;
       }
diff --git a/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php
index 25b5484a958acbaae4f9427ca3885659d256b0cb..437273b5ce2e734909bc0ca9cd2ce406ffb0d1ea 100644
--- a/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php
+++ b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php
@@ -80,7 +80,7 @@ public function getLangcode(Request $request = NULL) {
             if (!empty($config['domains'][$language->getId()])) {
               // Ensure that there is exactly one protocol in the URL when
               // checking the hostname.
-              $host = 'http://' . str_replace(array('http://', 'https://'), '', $config['domains'][$language->getId()]);
+              $host = 'http://' . str_replace(['http://', 'https://'], '', $config['domains'][$language->getId()]);
               $host = parse_url($host, PHP_URL_HOST);
               if ($http_host == $host) {
                 $langcode = $language->getId();
@@ -118,7 +118,7 @@ public function processInbound($path, Request $request) {
   /**
    * {@inheritdoc}
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
     $url_scheme = 'http';
     $port = 80;
     if ($request) {
@@ -151,7 +151,7 @@ public function processOutbound($path, &$options = array(), Request $request = N
         // retain it below.
         if (!empty($options['base_url'])) {
           // The colon in the URL scheme messes up the port checking below.
-          $normalized_base_url = str_replace(array('https://', 'http://'), '', $options['base_url']);
+          $normalized_base_url = str_replace(['https://', 'http://'], '', $options['base_url']);
         }
 
         // Ask for an absolute URL with our modified base URL.
@@ -191,20 +191,20 @@ public function processOutbound($path, &$options = array(), Request $request = N
    * {@inheritdoc}
    */
   public function getLanguageSwitchLinks(Request $request, $type, Url $url) {
-    $links = array();
+    $links = [];
     $query = $request->query->all();
 
     foreach ($this->languageManager->getNativeLanguages() as $language) {
-      $links[$language->getId()] = array(
+      $links[$language->getId()] = [
         // We need to clone the $url object to avoid using the same one for all
         // links. When the links are rendered, options are set on the $url
         // object, so if we use the same one, they would be set for all links.
         'url' => clone $url,
         'title' => $language->getName(),
         'language' => $language,
-        'attributes' => array('class' => array('language-link')),
+        'attributes' => ['class' => ['language-link']],
         'query' => $query,
-      );
+      ];
     }
 
     return $links;
diff --git a/core/modules/language/src/Plugin/migrate/destination/DefaultLangcode.php b/core/modules/language/src/Plugin/migrate/destination/DefaultLangcode.php
index a5a50a911daf1adaab79bef1cf04354a77e8984d..4d13e9adb4b99d4e5ae9dcec98eca3dd90bcca62 100644
--- a/core/modules/language/src/Plugin/migrate/destination/DefaultLangcode.php
+++ b/core/modules/language/src/Plugin/migrate/destination/DefaultLangcode.php
@@ -19,7 +19,7 @@ class DefaultLangcode extends Config {
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     $destination = $row->getDestination();
     $langcode = $destination['default_langcode'];
 
diff --git a/core/modules/language/src/Plugin/migrate/source/Language.php b/core/modules/language/src/Plugin/migrate/source/Language.php
index dc2e0ce38d764591986c3f319b1e0ca096f9c7c8..fa6a1996034fd6fa6c0673084ddbe3dce93bfd39 100644
--- a/core/modules/language/src/Plugin/migrate/source/Language.php
+++ b/core/modules/language/src/Plugin/migrate/source/Language.php
@@ -17,7 +17,7 @@ class Language extends DrupalSqlBase {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'language' => $this->t('The language code.'),
       'name' => $this->t('The English name of the language.'),
       'native' => $this->t('The native name of the language.'),
@@ -29,18 +29,18 @@ public function fields() {
       'prefix' => $this->t('Path prefix used for this language.'),
       'weight' => $this->t('The language weight when listed.'),
       'javascript' => $this->t('Location of the JavaScript translation file.'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'language' => array(
+    return [
+      'language' => [
         'type' => 'string',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettings.php b/core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettings.php
index c41b635c3d6428de524ae45c3ba871b0456d1d2a..ab9ba838137a28e9fbb29375f0498fe425d72987 100644
--- a/core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettings.php
+++ b/core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettings.php
@@ -19,20 +19,20 @@ class LanguageContentSettings extends DrupalSqlBase {
    */
   public function query() {
     return $this->select('node_type', 't')
-      ->fields('t', array(
+      ->fields('t', [
         'type',
-      ));
+      ]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'type' => $this->t('Type'),
       'language_content_type' => $this->t('Multilingual support.'),
       'i18n_lock_node' => $this->t('Lock language.'),
-    );
+    ];
     return $fields;
   }
 
diff --git a/core/modules/language/src/Plugin/migrate/source/d7/LanguageContentSettings.php b/core/modules/language/src/Plugin/migrate/source/d7/LanguageContentSettings.php
index 91ed020a3feeb9a22758bfd4a961b5cbffaa4849..cb748aec223e8c398fa0510e529bf90da9b9a70c 100644
--- a/core/modules/language/src/Plugin/migrate/source/d7/LanguageContentSettings.php
+++ b/core/modules/language/src/Plugin/migrate/source/d7/LanguageContentSettings.php
@@ -19,20 +19,20 @@ class LanguageContentSettings extends DrupalSqlBase {
    */
   public function query() {
     return $this->select('node_type', 't')
-      ->fields('t', array(
+      ->fields('t', [
         'type',
-      ));
+      ]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'type' => $this->t('Type'),
       'language_content_type' => $this->t('Multilingual support.'),
       'i18n_lock_node' => $this->t('Lock language.'),
-    );
+    ];
     return $fields;
   }
 
diff --git a/core/modules/language/src/Tests/EntityTypeWithoutLanguageFormTest.php b/core/modules/language/src/Tests/EntityTypeWithoutLanguageFormTest.php
index 20a3532ecfb7e89d6d8f28c4c1202dcb5f1ac7dc..97ccf2fd8cf220e7b5f74fbb1fcf128e75b14d61 100644
--- a/core/modules/language/src/Tests/EntityTypeWithoutLanguageFormTest.php
+++ b/core/modules/language/src/Tests/EntityTypeWithoutLanguageFormTest.php
@@ -19,10 +19,10 @@ class EntityTypeWithoutLanguageFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'language',
     'language_test',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -31,9 +31,9 @@ protected function setUp() {
     parent::setUp();
 
     // Create and log in administrative user.
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'administer languages',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
   }
 
diff --git a/core/modules/language/src/Tests/LanguageConfigurationElementTest.php b/core/modules/language/src/Tests/LanguageConfigurationElementTest.php
index 93b821d183a4b9378c39dba146768bec12820162..dc3eb260b6ade774b30a88f2fe81f2cf659efdbf 100644
--- a/core/modules/language/src/Tests/LanguageConfigurationElementTest.php
+++ b/core/modules/language/src/Tests/LanguageConfigurationElementTest.php
@@ -20,11 +20,11 @@ class LanguageConfigurationElementTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'node', 'language', 'language_elements_test', 'field_ui');
+  public static $modules = ['taxonomy', 'node', 'language', 'language_elements_test', 'field_ui'];
 
   protected function setUp() {
     parent::setUp();
-    $user = $this->drupalCreateUser(array('access administration pages', 'administer languages', 'administer content types'));
+    $user = $this->drupalCreateUser(['access administration pages', 'administer languages', 'administer content types']);
     $this->drupalLogin($user);
   }
 
@@ -60,12 +60,12 @@ public function testLanguageConfigurationElement() {
     $this->assertFieldChecked('edit-lang-configuration-language-alterable');
 
     // Test if content type settings have been saved.
-    $edit = array(
+    $edit = [
       'name' => 'Page',
       'type' => 'page',
       'language_configuration[langcode]' => 'authors_default',
       'language_configuration[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/add', $edit, 'Save and manage fields');
 
     // Make sure the settings are saved when creating the content type.
@@ -80,11 +80,11 @@ public function testLanguageConfigurationElement() {
    */
   public function testDefaultLangcode() {
     // Add some custom languages.
-    foreach (array('aa', 'bb', 'cc') as $language_code) {
-      ConfigurableLanguage::create(array(
+    foreach (['aa', 'bb', 'cc'] as $language_code) {
+      ConfigurableLanguage::create([
         'id' => $language_code,
         'label' => $this->randomMachineName(),
-      ))->save();
+      ])->save();
     }
 
     // Fixed language.
@@ -154,14 +154,14 @@ public function testNodeTypeUpdate() {
     // Create the article content type first if the profile used is not the
     // standard one.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
-    $admin_user = $this->drupalCreateUser(array('administer content types'));
+    $admin_user = $this->drupalCreateUser(['administer content types']);
     $this->drupalLogin($admin_user);
-    $edit = array(
+    $edit = [
       'language_configuration[langcode]' => 'current_interface',
       'language_configuration[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article', $edit, t('Save content type'));
     // Check the language default configuration for the articles.
     $configuration = ContentLanguageSettings::loadByEntityTypeBundle('node', 'article');
@@ -169,9 +169,9 @@ public function testNodeTypeUpdate() {
     $this->assertEqual($configuration->getDefaultLangcode(), 'current_interface', 'The default language configuration has been saved on the Article content type.');
     $this->assertTrue($configuration->isLanguageAlterable(), 'The alterable language configuration has been saved on the Article content type.');
     // Update the article content type by changing the title label.
-    $edit = array(
+    $edit = [
       'title_label' => 'Name'
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article', $edit, t('Save content type'));
     // Check that we still have the settings for the updated node type.
     $configuration = ContentLanguageSettings::loadByEntityTypeBundle('node', 'article');
@@ -187,19 +187,19 @@ public function testNodeTypeDelete() {
     // Create the article content type first if the profile used is not the
     // standard one.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array(
+      $this->drupalCreateContentType([
         'type' => 'article',
         'name' => 'Article'
-      ));
+      ]);
     }
-    $admin_user = $this->drupalCreateUser(array('administer content types'));
+    $admin_user = $this->drupalCreateUser(['administer content types']);
     $this->drupalLogin($admin_user);
 
     // Create language configuration for the articles.
-    $edit = array(
+    $edit = [
       'language_configuration[langcode]' => 'authors_default',
       'language_configuration[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article', $edit, t('Save content type'));
 
     // Check the language default configuration for articles is present.
@@ -207,7 +207,7 @@ public function testNodeTypeDelete() {
     $this->assertTrue($configuration, 'The language configuration is present.');
 
     // Delete 'article' bundle.
-    $this->drupalPostForm('admin/structure/types/manage/article/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/structure/types/manage/article/delete', [], t('Delete'));
 
     // Check that the language configuration has been deleted.
     \Drupal::entityManager()->getStorage('language_content_settings')->resetCache();
@@ -225,12 +225,12 @@ public function testTaxonomyVocabularyUpdate() {
     ]);
     $vocabulary->save();
 
-    $admin_user = $this->drupalCreateUser(array('administer taxonomy'));
+    $admin_user = $this->drupalCreateUser(['administer taxonomy']);
     $this->drupalLogin($admin_user);
-    $edit = array(
+    $edit = [
       'default_language[langcode]' => 'current_interface',
       'default_language[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/country', $edit, t('Save'));
 
     // Check the language default configuration.
@@ -239,9 +239,9 @@ public function testTaxonomyVocabularyUpdate() {
     $this->assertEqual($configuration->getDefaultLangcode(), 'current_interface', 'The default language configuration has been saved on the Country vocabulary.');
     $this->assertTrue($configuration->isLanguageAlterable(), 'The alterable language configuration has been saved on the Country vocabulary.');
     // Update the vocabulary.
-    $edit = array(
+    $edit = [
       'name' => 'Nation'
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/country', $edit, t('Save'));
     // Check that we still have the settings for the updated vocabulary.
     $configuration = ContentLanguageSettings::loadByEntityTypeBundle('taxonomy_term', 'country');
diff --git a/core/modules/language/src/Tests/LanguageConfigurationTest.php b/core/modules/language/src/Tests/LanguageConfigurationTest.php
index cf049f1ea0134c74155b0f7f71b8c54866eb0106..611b479c4d1162cf06e9bcca0f1e02a7dcbff467 100644
--- a/core/modules/language/src/Tests/LanguageConfigurationTest.php
+++ b/core/modules/language/src/Tests/LanguageConfigurationTest.php
@@ -18,7 +18,7 @@ class LanguageConfigurationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Functional tests for adding, editing and deleting languages.
@@ -29,7 +29,7 @@ function testLanguageConfiguration() {
     $this->assertEqual(ConfigurableLanguage::load('en')->getWeight(), 0, 'The English language has a weight of 0.');
 
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     $this->drupalLogin($admin_user);
 
     // Check if the Default English language has no path prefix.
@@ -41,9 +41,9 @@ function testLanguageConfiguration() {
     $this->assertFieldByXPath('//input[contains(@class, "button--primary")]', 'Add language', 'Add language is a primary button');
 
     // Add predefined language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Add language');
     $this->assertText('French');
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
@@ -63,9 +63,9 @@ function testLanguageConfiguration() {
     $this->assertFieldChecked('edit-site-default-language-en', 'English is the default language.');
 
     // Change the default language.
-    $edit = array(
+    $edit = [
       'site_default_language' => 'fr',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->rebuildContainer();
     $this->assertFieldChecked('edit-site-default-language-fr', 'Default language updated.');
@@ -80,16 +80,16 @@ function testLanguageConfiguration() {
     $this->assertFieldByXPath('//input[@name="prefix[fr]"]', 'fr', 'French still has a path prefix.');
 
     // Check that prefix can be changed.
-    $edit = array(
+    $edit = [
       'prefix[fr]' => 'french',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->assertFieldByXPath('//input[@name="prefix[fr]"]', 'french', 'French path prefix has changed.');
 
     // Check that the prefix can be removed.
-    $edit = array(
+    $edit = [
       'prefix[fr]' => '',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->assertNoText(t('The prefix may only be left blank for the selected detection fallback language.'), 'The path prefix can be removed for the default language');
 
@@ -97,24 +97,24 @@ function testLanguageConfiguration() {
     $this->config('language.negotiation')->set('selected_langcode', 'fr')->save();
     // Check that the prefix of a language that is not the negotiation one
     // cannot be changed to empty string.
-    $edit = array(
+    $edit = [
       'prefix[en]' => '',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->assertText(t('The prefix may only be left blank for the selected detection fallback language.'));
 
     //  Check that prefix cannot be changed to contain a slash.
-    $edit = array(
+    $edit = [
       'prefix[en]' => 'foo/bar',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->assertText(t('The prefix may not contain a slash.'), 'English prefix cannot be changed to contain a slash.');
 
     // Remove English language and add a new Language to check if langcode of
     // Language entity is 'en'.
-    $this->drupalPostForm('admin/config/regional/language/delete/en', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/language/delete/en', [], t('Delete'));
     $this->rebuildContainer();
-    $this->assertRaw(t('The %language (%langcode) language has been removed.', array('%language' => 'English', '%langcode' => 'en')));
+    $this->assertRaw(t('The %language (%langcode) language has been removed.', ['%language' => 'English', '%langcode' => 'en']));
 
     // Ensure that French language has a weight of 1 after being created through
     // the UI.
@@ -132,9 +132,9 @@ function testLanguageConfiguration() {
     $arabic->setWeight(4)->save();
     $this->assertEqual($arabic->getWeight(), 4, 'The Arabic language has a weight of 0.');
 
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'de',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, 'Add language');
     $language = $this->config('language.entity.de')->get();
     $this->assertEqual($language['langcode'], 'fr');
@@ -150,28 +150,28 @@ function testLanguageConfiguration() {
    */
   function testLanguageConfigurationWeight() {
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     $this->drupalLogin($admin_user);
     $this->checkConfigurableLanguageWeight();
 
     // Add predefined language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, 'Add language');
     $this->checkConfigurableLanguageWeight('after adding new language');
 
     // Re-ordering languages.
-    $edit = array(
+    $edit = [
       'languages[en][weight]' => $this->getHighestConfigurableLanguageWeight() + 1,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language', $edit, 'Save configuration');
     $this->checkConfigurableLanguageWeight('after re-ordering');
 
     // Remove predefined language.
-    $edit = array(
+    $edit = [
       'confirm' => 1,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/delete/fr', $edit, 'Delete');
     $this->checkConfigurableLanguageWeight('after deleting a language');
   }
@@ -188,7 +188,7 @@ protected function checkConfigurableLanguageWeight($state = 'by default') {
     // Reset language list.
     \Drupal::languageManager()->reset();
     $max_configurable_language_weight = $this->getHighestConfigurableLanguageWeight();
-    $replacements = array('@event' => $state);
+    $replacements = ['@event' => $state];
     foreach (\Drupal::languageManager()->getLanguages(LanguageInterface::STATE_LOCKED) as $locked_language) {
       $replacements['%language'] = $locked_language->getName();
       $this->assertTrue($locked_language->getWeight() > $max_configurable_language_weight, format_string('System language %language has higher weight than configurable languages @event', $replacements));
diff --git a/core/modules/language/src/Tests/LanguageCustomLanguageConfigurationTest.php b/core/modules/language/src/Tests/LanguageCustomLanguageConfigurationTest.php
index dbd35cdf30de889f928f245b943cb1eec7403157..2eb02df1973c75b04ad2af3bbedaa24548ff6277 100644
--- a/core/modules/language/src/Tests/LanguageCustomLanguageConfigurationTest.php
+++ b/core/modules/language/src/Tests/LanguageCustomLanguageConfigurationTest.php
@@ -18,7 +18,7 @@ class LanguageCustomLanguageConfigurationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Functional tests for adding, editing and deleting languages.
@@ -26,76 +26,76 @@ class LanguageCustomLanguageConfigurationTest extends WebTestBase {
   public function testLanguageConfiguration() {
 
     // Create user with permissions to add and remove languages.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     $this->drupalLogin($admin_user);
 
     // Add custom language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     // Test validation on missing values.
-    $this->assertText(t('@name field is required.', array('@name' => t('Language code'))));
-    $this->assertText(t('@name field is required.', array('@name' => t('Language name'))));
+    $this->assertText(t('@name field is required.', ['@name' => t('Language code')]));
+    $this->assertText(t('@name field is required.', ['@name' => t('Language name')]));
     $empty_language = new Language();
     $this->assertFieldChecked('edit-direction-' . $empty_language->getDirection(), 'Consistent usage of language direction.');
-    $this->assertUrl(\Drupal::url('language.add', array(), array('absolute' => TRUE)), [], 'Correct page redirection.');
+    $this->assertUrl(\Drupal::url('language.add', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
 
     // Test validation of invalid values.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => 'white space',
       'label' => '<strong>evil markup</strong>',
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
-    $this->assertRaw(t('%field must be a valid language tag as <a href=":url">defined by the W3C</a>.', array(
+    $this->assertRaw(t('%field must be a valid language tag as <a href=":url">defined by the W3C</a>.', [
       '%field' => t('Language code'),
       ':url' => 'http://www.w3.org/International/articles/language-tags/',
-    )));
+    ]));
 
-    $this->assertRaw(t('%field cannot contain any markup.', array('%field' => t('Language name'))));
-    $this->assertUrl(\Drupal::url('language.add', array(), array('absolute' => TRUE)), [], 'Correct page redirection.');
+    $this->assertRaw(t('%field cannot contain any markup.', ['%field' => t('Language name')]));
+    $this->assertUrl(\Drupal::url('language.add', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
 
     // Test adding a custom language with a numeric region code.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => 'es-419',
       'label' => 'Latin American Spanish',
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
 
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     $this->assertRaw(t(
       'The language %language has been created and can now be used.',
-      array('%language' => $edit['label'])
+      ['%language' => $edit['label']]
     ));
-    $this->assertUrl(\Drupal::url('entity.configurable_language.collection', array(), array('absolute' => TRUE)), [], 'Correct page redirection.');
+    $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
 
     // Test validation of existing language values.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => 'de',
       'label' => 'German',
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
 
     // Add the language the first time.
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     $this->assertRaw(t(
       'The language %language has been created and can now be used.',
-      array('%language' => $edit['label'])
+      ['%language' => $edit['label']]
     ));
-    $this->assertUrl(\Drupal::url('entity.configurable_language.collection', array(), array('absolute' => TRUE)), [], 'Correct page redirection.');
+    $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
 
     // Add the language a second time and confirm that this is not allowed.
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     $this->assertRaw(t(
       'The language %language (%langcode) already exists.',
-      array('%language' => $edit['label'], '%langcode' => $edit['langcode'])
+      ['%language' => $edit['label'], '%langcode' => $edit['langcode']]
     ));
-    $this->assertUrl(\Drupal::url('language.add', array(), array('absolute' => TRUE)), [], 'Correct page redirection.');
+    $this->assertUrl(\Drupal::url('language.add', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
   }
 
 }
diff --git a/core/modules/language/src/Tests/LanguageListTest.php b/core/modules/language/src/Tests/LanguageListTest.php
index d407530603b80a5ca50966153554e359b52b1dc0..2ed4962e11099609d864c728dd2dbc34d609188f 100644
--- a/core/modules/language/src/Tests/LanguageListTest.php
+++ b/core/modules/language/src/Tests/LanguageListTest.php
@@ -19,7 +19,7 @@ class LanguageListTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Functional tests for adding, editing and deleting languages.
@@ -27,7 +27,7 @@ class LanguageListTest extends WebTestBase {
   function testLanguageList() {
 
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     $this->drupalLogin($admin_user);
 
     // Get the weight of the last language.
@@ -35,9 +35,9 @@ function testLanguageList() {
     $last_language_weight = end($languages)->getWeight();
 
     // Add predefined language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
     $this->assertText('French', 'Language added successfully.');
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE]));
@@ -53,12 +53,12 @@ function testLanguageList() {
     // Add custom language.
     $langcode = 'xx';
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => Language::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE]));
     $this->assertRaw('"edit-languages-' . $langcode . '-weight"', 'Language code found.');
@@ -72,9 +72,9 @@ function testLanguageList() {
     $this->drupalGet($path);
     $this->assertFieldChecked('edit-site-default-language-en', 'English is the default language.');
     // Change the default language.
-    $edit = array(
+    $edit = [
       'site_default_language' => $langcode,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->rebuildContainer();
     $this->assertNoFieldChecked('edit-site-default-language-en', 'Default language updated.');
@@ -90,17 +90,17 @@ function testLanguageList() {
     $this->assertTitle(t('Edit language | Drupal'), 'Page title is "Edit language".');
     // Edit a language.
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'label' => $name,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/edit/' . $langcode, $edit, t('Save language'));
     $this->assertRaw($name, 'The language has been updated.');
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE, 'language' => $language]));
 
     // Change back the default language.
-    $edit = array(
+    $edit = [
       'site_default_language' => 'en',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save configuration'));
     $this->rebuildContainer();
     // Ensure 'delete' link works.
@@ -115,9 +115,9 @@ function testLanguageList() {
     $this->assertRaw($name, 'The language was not deleted.');
     // Delete the language for real. This a confirm form, we do not need any
     // fields changed.
-    $this->drupalPostForm('admin/config/regional/language/delete/' . $langcode, array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/language/delete/' . $langcode, [], t('Delete'));
     // We need raw here because %language and %langcode will add HTML.
-    $t_args = array('%language' => $name, '%langcode' => $langcode);
+    $t_args = ['%language' => $name, '%langcode' => $langcode];
     $this->assertRaw(t('The %language (%langcode) language has been removed.', $t_args), 'The test language has been removed.');
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE, 'language' => $english]));
     // Verify that language is no longer found.
@@ -125,11 +125,11 @@ function testLanguageList() {
     $this->assertResponse(404, 'Language no longer found.');
 
     // Delete French.
-    $this->drupalPostForm('admin/config/regional/language/delete/fr', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/language/delete/fr', [], t('Delete'));
     // Make sure the "language_count" state has been updated correctly.
     $this->rebuildContainer();
     // We need raw here because %language and %langcode will add HTML.
-    $t_args = array('%language' => 'French', '%langcode' => 'fr');
+    $t_args = ['%language' => 'French', '%langcode' => 'fr'];
     $this->assertRaw(t('The %language (%langcode) language has been removed.', $t_args), 'The French language has been removed.');
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE]));
     // Verify that language is no longer found.
@@ -142,12 +142,12 @@ function testLanguageList() {
     // deleting English.
     $langcode = 'xx';
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => Language::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE]));
     $this->assertText($name, 'Name found.');
@@ -157,17 +157,17 @@ function testLanguageList() {
     $this->drupalGet($path);
     $this->assertFieldChecked('edit-site-default-language-en', 'English is the default language.');
     // Change the default language.
-    $edit = array(
+    $edit = [
       'site_default_language' => $langcode,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
     $this->rebuildContainer();
     $this->assertNoFieldChecked('edit-site-default-language-en', 'Default language updated.');
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE, 'language' => $language]));
 
-    $this->drupalPostForm('admin/config/regional/language/delete/en', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/language/delete/en', [], t('Delete'));
     // We need raw here because %language and %langcode will add HTML.
-    $t_args = array('%language' => 'English', '%langcode' => 'en');
+    $t_args = ['%language' => 'English', '%langcode' => 'en'];
     $this->assertRaw(t('The %language (%langcode) language has been removed.', $t_args), 'The English language has been removed.');
     $this->rebuildContainer();
 
@@ -178,7 +178,7 @@ function testLanguageList() {
     // Ensure that NL cannot be set default when it's not available.
     $this->drupalGet('admin/config/regional/language');
     $extra_values = '&site_default_language=nl';
-    $this->drupalPostForm(NULL, array(), t('Save configuration'), array(), array(), NULL, $extra_values);
+    $this->drupalPostForm(NULL, [], t('Save configuration'), [], [], NULL, $extra_values);
     $this->assertText(t('Selected default language no longer exists.'));
     $this->assertNoFieldChecked('edit-site-default-language-xx', 'The previous default language got deselected.');
   }
@@ -188,22 +188,22 @@ function testLanguageList() {
    */
   function testLanguageStates() {
     // Add some languages, and also lock some of them.
-    ConfigurableLanguage::create(array('label' => $this->randomMachineName(), 'id' => 'l1'))->save();
-    ConfigurableLanguage::create(array('label' => $this->randomMachineName(), 'id' => 'l2', 'locked' => TRUE))->save();
-    ConfigurableLanguage::create(array('label' => $this->randomMachineName(), 'id' => 'l3'))->save();
-    ConfigurableLanguage::create(array('label' => $this->randomMachineName(), 'id' => 'l4', 'locked' => TRUE))->save();
-    $expected_locked_languages = array('l4' => 'l4', 'l2' => 'l2', 'und' => 'und', 'zxx' => 'zxx');
-    $expected_all_languages = array('l4' => 'l4', 'l3' => 'l3', 'l2' => 'l2', 'l1' => 'l1', 'en' => 'en', 'und' => 'und', 'zxx' => 'zxx');
-    $expected_conf_languages = array('l3' => 'l3', 'l1' => 'l1', 'en' => 'en');
+    ConfigurableLanguage::create(['label' => $this->randomMachineName(), 'id' => 'l1'])->save();
+    ConfigurableLanguage::create(['label' => $this->randomMachineName(), 'id' => 'l2', 'locked' => TRUE])->save();
+    ConfigurableLanguage::create(['label' => $this->randomMachineName(), 'id' => 'l3'])->save();
+    ConfigurableLanguage::create(['label' => $this->randomMachineName(), 'id' => 'l4', 'locked' => TRUE])->save();
+    $expected_locked_languages = ['l4' => 'l4', 'l2' => 'l2', 'und' => 'und', 'zxx' => 'zxx'];
+    $expected_all_languages = ['l4' => 'l4', 'l3' => 'l3', 'l2' => 'l2', 'l1' => 'l1', 'en' => 'en', 'und' => 'und', 'zxx' => 'zxx'];
+    $expected_conf_languages = ['l3' => 'l3', 'l1' => 'l1', 'en' => 'en'];
 
     $locked_languages = $this->container->get('language_manager')->getLanguages(LanguageInterface::STATE_LOCKED);
-    $this->assertEqual(array_diff_key($expected_locked_languages, $locked_languages), array(), 'Locked languages loaded correctly.');
+    $this->assertEqual(array_diff_key($expected_locked_languages, $locked_languages), [], 'Locked languages loaded correctly.');
 
     $all_languages = $this->container->get('language_manager')->getLanguages(LanguageInterface::STATE_ALL);
-    $this->assertEqual(array_diff_key($expected_all_languages, $all_languages), array(), 'All languages loaded correctly.');
+    $this->assertEqual(array_diff_key($expected_all_languages, $all_languages), [], 'All languages loaded correctly.');
 
     $conf_languages = $this->container->get('language_manager')->getLanguages();
-    $this->assertEqual(array_diff_key($expected_conf_languages, $conf_languages), array(), 'Configurable languages loaded correctly.');
+    $this->assertEqual(array_diff_key($expected_conf_languages, $conf_languages), [], 'Configurable languages loaded correctly.');
   }
 
 }
diff --git a/core/modules/language/src/Tests/LanguageLocaleListTest.php b/core/modules/language/src/Tests/LanguageLocaleListTest.php
index dd3e02a1f38336c9259647f4fbd4aef202cb7062..022a072d1f7a333f59128ada3f0fc811940d874f 100644
--- a/core/modules/language/src/Tests/LanguageLocaleListTest.php
+++ b/core/modules/language/src/Tests/LanguageLocaleListTest.php
@@ -16,7 +16,7 @@ class LanguageLocaleListTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'locale');
+  public static $modules = ['language', 'locale'];
 
   /**
    * {@inheritdoc}
@@ -32,28 +32,28 @@ protected function setUp() {
    */
   function testLanguageLocaleList() {
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     $this->drupalLogin($admin_user);
 
     // Add predefined language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
     $this->assertText('The language French has been created and can now be used');
     $this->assertUrl(\Drupal::url('entity.configurable_language.collection', [], ['absolute' => TRUE]));
     $this->rebuildContainer();
 
     // Translate Spanish language to French (Espagnol).
-    $source = $this->storage->createString(array(
+    $source = $this->storage->createString([
       'source' => 'Spanish',
       'context' => '',
-    ))->save();
-    $this->storage->createTranslation(array(
+    ])->save();
+    $this->storage->createTranslation([
       'lid' => $source->lid,
       'language' => 'fr',
       'translation' => 'Espagnol',
-    ))->save();
+    ])->save();
 
     // Get language list displayed in select list.
     $this->drupalGet('fr/admin/config/regional/language/add');
diff --git a/core/modules/language/src/Tests/LanguageSelectorTranslatableTest.php b/core/modules/language/src/Tests/LanguageSelectorTranslatableTest.php
index 84d677911d6f5fba2bd2b2c2b08f2a597aa28989..d13626cc452c94ff352fad4cd32c6501bce11b70 100644
--- a/core/modules/language/src/Tests/LanguageSelectorTranslatableTest.php
+++ b/core/modules/language/src/Tests/LanguageSelectorTranslatableTest.php
@@ -16,7 +16,7 @@ class LanguageSelectorTranslatableTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'language',
     'content_translation',
     'node',
@@ -24,7 +24,7 @@ class LanguageSelectorTranslatableTest extends WebTestBase {
     'field_ui',
     'entity_test',
     'locale',
-  );
+  ];
 
   /**
    * The user with administrator privileges.
@@ -49,13 +49,13 @@ protected function setUp() {
    */
   protected function getAdministratorPermissions() {
     return array_filter(
-      array('translate interface',
+      ['translate interface',
         'administer content translation',
         'create content translations',
         'update content translations',
         'delete content translations',
         'administer languages',
-      )
+      ]
     );
   }
 
@@ -64,7 +64,7 @@ protected function getAdministratorPermissions() {
    */
   public function testLanguageStringSelector() {
     // Add another language.
-    $edit = array('predefined_langcode' => 'es');
+    $edit = ['predefined_langcode' => 'es'];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Translate the string English in Spanish (Inglés). Override config entity.
@@ -79,7 +79,7 @@ public function testLanguageStringSelector() {
     $this->drupalGet($path);
 
     // Get en language from selector.
-    $elements = $this->xpath('//select[@id=:id]//option[@value=:option]', array(':id' => 'edit-settings-user-user-settings-language-langcode', ':option' => 'en'));
+    $elements = $this->xpath('//select[@id=:id]//option[@value=:option]', [':id' => 'edit-settings-user-user-settings-language-langcode', ':option' => 'en']);
 
     // Check that the language text is translated.
     $this->assertEqual((string) $elements[0], $name_translation, 'Checking the option string English is translated to Spanish.');
diff --git a/core/modules/language/src/Tests/LanguageSwitchingTest.php b/core/modules/language/src/Tests/LanguageSwitchingTest.php
index 5d4469d3af6998e708a99f759144416a32ba4b18..3d04a648224636c0ab62187acde426b0a3365b52 100644
--- a/core/modules/language/src/Tests/LanguageSwitchingTest.php
+++ b/core/modules/language/src/Tests/LanguageSwitchingTest.php
@@ -20,13 +20,13 @@ class LanguageSwitchingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale', 'locale_test', 'language', 'block', 'language_test', 'menu_ui');
+  public static $modules = ['locale', 'locale_test', 'language', 'block', 'language_test', 'menu_ui'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $admin_user = $this->drupalCreateUser(array('administer blocks', 'administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer blocks', 'administer languages', 'access administration pages']);
     $this->drupalLogin($admin_user);
   }
 
@@ -35,24 +35,24 @@ protected function setUp() {
    */
   function testLanguageBlock() {
     // Add language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Set the native language name.
     $this->saveNativeLanguageName('fr', 'français');
 
     // Enable URL language detection and selection.
-    $edit = array('language_interface[enabled][language-url]' => '1');
+    $edit = ['language_interface[enabled][language-url]' => '1'];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Enable the language switching block.
-    $block = $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_INTERFACE, array(
+    $block = $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_INTERFACE, [
       'id' => 'test_language_block',
       // Ensure a 2-byte UTF-8 sequence is in the tested output.
       'label' => $this->randomMachineName(8) . '×',
-    ));
+    ]);
 
     $this->doTestLanguageBlockAuthenticated($block->label());
     $this->doTestLanguageBlockAnonymous($block->label());
@@ -73,38 +73,38 @@ protected function doTestLanguageBlockAuthenticated($block_label) {
 
     // Assert that each list item and anchor element has the appropriate data-
     // attributes.
-    list($language_switcher) = $this->xpath('//div[@id=:id]', array(':id' => 'block-test-language-block'));
-    $list_items = array();
-    $anchors = array();
-    $labels = array();
+    list($language_switcher) = $this->xpath('//div[@id=:id]', [':id' => 'block-test-language-block']);
+    $list_items = [];
+    $anchors = [];
+    $labels = [];
     foreach ($language_switcher->ul->li as $list_item) {
       $classes = explode(" ", (string) $list_item['class']);
-      list($langcode) = array_intersect($classes, array('en', 'fr'));
-      $list_items[] = array(
+      list($langcode) = array_intersect($classes, ['en', 'fr']);
+      $list_items[] = [
         'langcode_class' => $langcode,
         'data-drupal-link-system-path' => (string) $list_item['data-drupal-link-system-path'],
-      );
-      $anchors[] = array(
+      ];
+      $anchors[] = [
         'hreflang' => (string) $list_item->a['hreflang'],
         'data-drupal-link-system-path' => (string) $list_item->a['data-drupal-link-system-path'],
-      );
+      ];
       $labels[] = (string) $list_item->a;
     }
-    $expected_list_items = array(
-      0 => array('langcode_class' => 'en', 'data-drupal-link-system-path' => 'user/2'),
-      1 => array('langcode_class' => 'fr', 'data-drupal-link-system-path' => 'user/2'),
-    );
+    $expected_list_items = [
+      0 => ['langcode_class' => 'en', 'data-drupal-link-system-path' => 'user/2'],
+      1 => ['langcode_class' => 'fr', 'data-drupal-link-system-path' => 'user/2'],
+    ];
     $this->assertIdentical($list_items, $expected_list_items, 'The list items have the correct attributes that will allow the drupal.active-link library to mark them as active.');
-    $expected_anchors = array(
-      0 => array('hreflang' => 'en', 'data-drupal-link-system-path' => 'user/2'),
-      1 => array('hreflang' => 'fr', 'data-drupal-link-system-path' => 'user/2'),
-    );
+    $expected_anchors = [
+      0 => ['hreflang' => 'en', 'data-drupal-link-system-path' => 'user/2'],
+      1 => ['hreflang' => 'fr', 'data-drupal-link-system-path' => 'user/2'],
+    ];
     $this->assertIdentical($anchors, $expected_anchors, 'The anchors have the correct attributes that will allow the drupal.active-link library to mark them as active.');
     $settings = $this->getDrupalSettings();
     $this->assertIdentical($settings['path']['currentPath'], 'user/2', 'drupalSettings.path.currentPath is set correctly to allow drupal.active-link to mark the correct links as active.');
     $this->assertIdentical($settings['path']['isFront'], FALSE, 'drupalSettings.path.isFront is set correctly to allow drupal.active-link to mark the correct links as active.');
     $this->assertIdentical($settings['path']['currentLanguage'], 'en', 'drupalSettings.path.currentLanguage is set correctly to allow drupal.active-link to mark the correct links as active.');
-    $this->assertIdentical($labels, array('English', 'français'), 'The language links labels are in their own language on the language switcher block.');
+    $this->assertIdentical($labels, ['English', 'français'], 'The language links labels are in their own language on the language switcher block.');
   }
 
   /**
@@ -124,19 +124,19 @@ protected function doTestLanguageBlockAnonymous($block_label) {
     $this->assertText($block_label, 'Language switcher block found.');
 
     // Assert that only the current language is marked as active.
-    list($language_switcher) = $this->xpath('//div[@id=:id]', array(':id' => 'block-test-language-block'));
-    $links = array(
-      'active' => array(),
-      'inactive' => array(),
-    );
-    $anchors = array(
-      'active' => array(),
-      'inactive' => array(),
-    );
-    $labels = array();
+    list($language_switcher) = $this->xpath('//div[@id=:id]', [':id' => 'block-test-language-block']);
+    $links = [
+      'active' => [],
+      'inactive' => [],
+    ];
+    $anchors = [
+      'active' => [],
+      'inactive' => [],
+    ];
+    $labels = [];
     foreach ($language_switcher->ul->li as $link) {
       $classes = explode(" ", (string) $link['class']);
-      list($langcode) = array_intersect($classes, array('en', 'fr'));
+      list($langcode) = array_intersect($classes, ['en', 'fr']);
       if (in_array('is-active', $classes)) {
         $links['active'][] = $langcode;
       }
@@ -152,9 +152,9 @@ protected function doTestLanguageBlockAnonymous($block_label) {
       }
       $labels[] = (string) $link->a;
     }
-    $this->assertIdentical($links, array('active' => array('en'), 'inactive' => array('fr')), 'Only the current language list item is marked as active on the language switcher block.');
-    $this->assertIdentical($anchors, array('active' => array('en'), 'inactive' => array('fr')), 'Only the current language anchor is marked as active on the language switcher block.');
-    $this->assertIdentical($labels, array('English', 'français'), 'The language links labels are in their own language on the language switcher block.');
+    $this->assertIdentical($links, ['active' => ['en'], 'inactive' => ['fr']], 'Only the current language list item is marked as active on the language switcher block.');
+    $this->assertIdentical($anchors, ['active' => ['en'], 'inactive' => ['fr']], 'Only the current language anchor is marked as active on the language switcher block.');
+    $this->assertIdentical($labels, ['English', 'français'], 'The language links labels are in their own language on the language switcher block.');
   }
 
   /**
@@ -171,31 +171,31 @@ function testLanguageBlockWithDomain() {
     $languages = $this->container->get('language_manager')->getLanguages();
 
     // Enable browser and URL language detection.
-    $edit = array(
+    $edit = [
       'language_interface[enabled][language-url]' => TRUE,
       'language_interface[weight][language-url]' => -10,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Do not allow blank domain.
-    $edit = array(
+    $edit = [
       'language_negotiation_url_part' => LanguageNegotiationUrl::CONFIG_DOMAIN,
       'domain[en]' => '',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, t('Save configuration'));
     $this->assertText(t('The domain may not be left blank for English'), 'The form does not allow blank domains.');
 
     // Change the domain for the Italian language.
-    $edit = array(
+    $edit = [
       'language_negotiation_url_part' => LanguageNegotiationUrl::CONFIG_DOMAIN,
       'domain[en]' => \Drupal::request()->getHost(),
       'domain[it]' => 'it.example.com',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, t('Save configuration'));
     $this->assertText(t('The configuration options have been saved'), 'Domain configuration is saved.');
 
     // Enable the language switcher block.
-    $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_INTERFACE, array('id' => 'test_language_block'));
+    $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_INTERFACE, ['id' => 'test_language_block']);
 
     $this->drupalGet('');
 
@@ -203,19 +203,19 @@ function testLanguageBlockWithDomain() {
     $generator = $this->container->get('url_generator');
 
     // Verify the English URL is correct
-    list($english_link) = $this->xpath('//div[@id=:id]/ul/li/a[@hreflang=:hreflang]', array(
+    list($english_link) = $this->xpath('//div[@id=:id]/ul/li/a[@hreflang=:hreflang]', [
       ':id' => 'block-test-language-block',
       ':hreflang' => 'en',
-    ));
-    $english_url = $generator->generateFromRoute('entity.user.canonical', array('user' => 2), array('language' => $languages['en']));
+    ]);
+    $english_url = $generator->generateFromRoute('entity.user.canonical', ['user' => 2], ['language' => $languages['en']]);
     $this->assertEqual($english_url, (string) $english_link['href']);
 
     // Verify the Italian URL is correct
-    list($italian_link) = $this->xpath('//div[@id=:id]/ul/li/a[@hreflang=:hreflang]', array(
+    list($italian_link) = $this->xpath('//div[@id=:id]/ul/li/a[@hreflang=:hreflang]', [
       ':id' => 'block-test-language-block',
       ':hreflang' => 'it',
-    ));
-    $italian_url = $generator->generateFromRoute('entity.user.canonical', array('user' => 2), array('language' => $languages['it']));
+    ]);
+    $italian_url = $generator->generateFromRoute('entity.user.canonical', ['user' => 2], ['language' => $languages['it']]);
     $this->assertEqual($italian_url, (string) $italian_link['href']);
   }
 
@@ -224,13 +224,13 @@ function testLanguageBlockWithDomain() {
    */
   function testLanguageLinkActiveClass() {
     // Add language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Enable URL language detection and selection.
-    $edit = array('language_interface[enabled][language-url]' => '1');
+    $edit = ['language_interface[enabled][language-url]' => '1'];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     $this->doTestLanguageLinkActiveClassAuthenticated();
@@ -244,23 +244,23 @@ function testLanguageBodyClass() {
     $searched_class = 'path-admin';
 
     // Add language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Enable URL language detection and selection.
-    $edit = array('language_interface[enabled][language-url]' => '1');
+    $edit = ['language_interface[enabled][language-url]' => '1'];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Check if the default (English) admin/config page has the right class.
     $this->drupalGet('admin/config');
-    $class = $this->xpath('//body[contains(@class, :class)]', array(':class' => $searched_class));
+    $class = $this->xpath('//body[contains(@class, :class)]', [':class' => $searched_class]);
     $this->assertTrue(isset($class[0]), t('The path-admin class appears on default language.'));
 
     // Check if the French admin/config page has the right class.
     $this->drupalGet('fr/admin/config');
-    $class = $this->xpath('//body[contains(@class, :class)]', array(':class' => $searched_class));
+    $class = $this->xpath('//body[contains(@class, :class)]', [':class' => $searched_class]);
     $this->assertTrue(isset($class[0]), t('The path-admin class same as on default language.'));
 
     // The testing profile sets the user/login page as the frontpage. That
@@ -270,12 +270,12 @@ function testLanguageBodyClass() {
 
     // Check if the default (English) frontpage has the right class.
     $this->drupalGet('<front>');
-    $class = $this->xpath('//body[contains(@class, :class)]', array(':class' => 'path-frontpage'));
+    $class = $this->xpath('//body[contains(@class, :class)]', [':class' => 'path-frontpage']);
     $this->assertTrue(isset($class[0]), 'path-frontpage class found on the body tag');
 
     // Check if the French frontpage has the right class.
     $this->drupalGet('fr');
-    $class = $this->xpath('//body[contains(@class, :class)]', array(':class' => 'path-frontpage'));
+    $class = $this->xpath('//body[contains(@class, :class)]', [':class' => 'path-frontpage']);
     $this->assertTrue(isset($class[0]), 'path-frontpage class found on the body tag with french as the active language');
 
   }
@@ -295,18 +295,18 @@ protected function doTestLanguageLinkActiveClassAuthenticated() {
 
     // Language code 'none' link should be active.
     $langcode = 'none';
-    $links = $this->xpath('//a[@id = :id and @data-drupal-link-system-path = :path]', array(':id' => 'no_lang_link', ':path' => $path));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and @data-drupal-link-system-path = :path]', [':id' => 'no_lang_link', ':path' => $path]);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Language code 'en' link should be active.
     $langcode = 'en';
-    $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', array(':id' => 'en_link', ':lang' => 'en', ':path' => $path));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', [':id' => 'en_link', ':lang' => 'en', ':path' => $path]);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Language code 'fr' link should not be active.
     $langcode = 'fr';
-    $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', array(':id' => 'fr_link', ':lang' => 'fr', ':path' => $path));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to NOT mark it as active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', [':id' => 'fr_link', ':lang' => 'fr', ':path' => $path]);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to NOT mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Verify that drupalSettings contains the correct values.
     $settings = $this->getDrupalSettings();
@@ -320,18 +320,18 @@ protected function doTestLanguageLinkActiveClassAuthenticated() {
 
     // Language code 'none' link should be active.
     $langcode = 'none';
-    $links = $this->xpath('//a[@id = :id and @data-drupal-link-system-path = :path]', array(':id' => 'no_lang_link', ':path' => $path));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and @data-drupal-link-system-path = :path]', [':id' => 'no_lang_link', ':path' => $path]);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Language code 'en' link should not be active.
     $langcode = 'en';
-    $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', array(':id' => 'en_link', ':lang' => 'en', ':path' => $path));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to NOT mark it as active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', [':id' => 'en_link', ':lang' => 'en', ':path' => $path]);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to NOT mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Language code 'fr' link should be active.
     $langcode = 'fr';
-    $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', array(':id' => 'fr_link', ':lang' => 'fr', ':path' => $path));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and @hreflang = :lang and @data-drupal-link-system-path = :path]', [':id' => 'fr_link', ':lang' => 'fr', ':path' => $path]);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode has the correct attributes that will allow the drupal.active-link library to mark it as active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Verify that drupalSettings contains the correct values.
     $settings = $this->getDrupalSettings();
@@ -356,18 +356,18 @@ protected function doTestLanguageLinkActiveClassAnonymous() {
 
     // Language code 'none' link should be active.
     $langcode = 'none';
-    $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', array(':id' => 'no_lang_link', ':class' => 'is-active'));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', [':id' => 'no_lang_link', ':class' => 'is-active']);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Language code 'en' link should be active.
     $langcode = 'en';
-    $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', array(':id' => 'en_link', ':class' => 'is-active'));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', [':id' => 'en_link', ':class' => 'is-active']);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Language code 'fr' link should not be active.
     $langcode = 'fr';
-    $links = $this->xpath('//a[@id = :id and not(contains(@class, :class))]', array(':id' => 'fr_link', ':class' => 'is-active'));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is NOT marked active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and not(contains(@class, :class))]', [':id' => 'fr_link', ':class' => 'is-active']);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is NOT marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Test links generated by the link generator on a French page.
     $current_language = 'French';
@@ -375,18 +375,18 @@ protected function doTestLanguageLinkActiveClassAnonymous() {
 
     // Language code 'none' link should be active.
     $langcode = 'none';
-    $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', array(':id' => 'no_lang_link', ':class' => 'is-active'));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', [':id' => 'no_lang_link', ':class' => 'is-active']);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Language code 'en' link should not be active.
     $langcode = 'en';
-    $links = $this->xpath('//a[@id = :id and not(contains(@class, :class))]', array(':id' => 'en_link', ':class' => 'is-active'));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is NOT marked active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and not(contains(@class, :class))]', [':id' => 'en_link', ':class' => 'is-active']);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is NOT marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
 
     // Language code 'fr' link should be active.
     $langcode = 'fr';
-    $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', array(':id' => 'fr_link', ':class' => 'is-active'));
-    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', array(':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode)));
+    $links = $this->xpath('//a[@id = :id and contains(@class, :class)]', [':id' => 'fr_link', ':class' => 'is-active']);
+    $this->assertTrue(isset($links[0]), t('A link generated by :function to the current :language page with langcode :langcode is marked active.', [':function' => $function_name, ':language' => $current_language, ':langcode' => $langcode]));
   }
 
   /**
@@ -394,27 +394,27 @@ protected function doTestLanguageLinkActiveClassAnonymous() {
    */
   public function testLanguageSessionSwitchLinks() {
     // Add language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Enable session language detection and selection.
-    $edit = array(
+    $edit = [
       'language_interface[enabled][language-url]' => FALSE,
       'language_interface[enabled][language-session]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Enable the language switching block.
-    $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_INTERFACE, array(
+    $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_INTERFACE, [
       'id' => 'test_language_block',
-    ));
+    ]);
 
     // Enable the main menu block.
-    $this->drupalPlaceBlock('system_menu_block:main', array(
+    $this->drupalPlaceBlock('system_menu_block:main', [
       'id' => 'test_menu',
-    ));
+    ]);
 
     // Add a link to the homepage.
     $link = MenuLinkContent::create([
diff --git a/core/modules/language/src/Tests/LanguageTourTest.php b/core/modules/language/src/Tests/LanguageTourTest.php
index 7778367385fe1d9374ac2fe6909e7729858addc0..b11006ec3e9f39a43ab88879ae22b295e0350df5 100644
--- a/core/modules/language/src/Tests/LanguageTourTest.php
+++ b/core/modules/language/src/Tests/LanguageTourTest.php
@@ -30,7 +30,7 @@ class LanguageTourTest extends TourTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array('administer languages', 'access tour'));
+    $this->adminUser = $this->drupalCreateUser(['administer languages', 'access tour']);
     $this->drupalLogin($this->adminUser);
     $this->drupalPlaceBlock('local_actions_block');
   }
diff --git a/core/modules/language/src/Tests/LanguageUILanguageNegotiationTest.php b/core/modules/language/src/Tests/LanguageUILanguageNegotiationTest.php
index 03dd8cbf02649ec635bd55d945a7890387012c7c..0008186ed10fcd840d97f67373a6c5a9f2494644 100644
--- a/core/modules/language/src/Tests/LanguageUILanguageNegotiationTest.php
+++ b/core/modules/language/src/Tests/LanguageUILanguageNegotiationTest.php
@@ -48,12 +48,12 @@ class LanguageUILanguageNegotiationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale', 'language_test', 'block', 'user', 'content_translation');
+  public static $modules = ['locale', 'language_test', 'block', 'user', 'content_translation'];
 
   protected function setUp() {
     parent::setUp();
 
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'translate interface', 'access administration pages', 'administer blocks'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'translate interface', 'access administration pages', 'administer blocks']);
     $this->drupalLogin($admin_user);
   }
 
@@ -69,9 +69,9 @@ function testUILanguageNegotiation() {
     // For testing path prefix.
     $langcode = 'zh-hans';
     // For setting browser language preference to 'vi'.
-    $http_header_browser_fallback = array("Accept-Language: $langcode_browser_fallback;q=1");
+    $http_header_browser_fallback = ["Accept-Language: $langcode_browser_fallback;q=1"];
     // For setting browser language preference to some unknown.
-    $http_header_blah = array("Accept-Language: blah;q=1");
+    $http_header_blah = ["Accept-Language: blah;q=1"];
 
     // Setup the site languages by installing two languages.
     // Set the default language in order for the translated string to be registered
@@ -101,114 +101,114 @@ function testUILanguageNegotiation() {
     $language_browser_fallback_string = "In $langcode_browser_fallback In $langcode_browser_fallback In $langcode_browser_fallback";
     $language_string = "In $langcode In $langcode In $langcode";
     // Do a translate search of our target string.
-    $search = array(
+    $search = [
       'string' => $default_string,
       'langcode' => $langcode_browser_fallback,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $language_browser_fallback_string,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
-    $search = array(
+    $search = [
       'string' => $default_string,
       'langcode' => $langcode,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $language_string,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Configure selected language negotiation to use zh-hans.
-    $edit = array('selected_langcode' => $langcode);
+    $edit = ['selected_langcode' => $langcode];
     $this->drupalPostForm('admin/config/regional/language/detection/selected', $edit, t('Save configuration'));
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $language_string,
       'expected_method_id' => LanguageNegotiationSelected::METHOD_ID,
       'http_header' => $http_header_browser_fallback,
       'message' => 'SELECTED: UI language is switched based on selected language.',
-    );
+    ];
     $this->doRunTest($test);
 
     // An invalid language is selected.
     $this->config('language.negotiation')->set('selected_langcode', NULL)->save();
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $default_string,
       'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
       'http_header' => $http_header_browser_fallback,
       'message' => 'SELECTED > DEFAULT: UI language is switched based on selected language.',
-    );
+    ];
     $this->doRunTest($test);
 
     // No selected language is available.
     $this->config('language.negotiation')->set('selected_langcode', $langcode_unknown)->save();
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $default_string,
       'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
       'http_header' => $http_header_browser_fallback,
       'message' => 'SELECTED > DEFAULT: UI language is switched based on selected language.',
-    );
+    ];
     $this->doRunTest($test);
 
-    $tests = array(
+    $tests = [
       // Default, browser preference should have no influence.
-      array(
-        'language_negotiation' => array(LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+      [
+        'language_negotiation' => [LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
         'path' => 'admin/config',
         'expect' => $default_string,
         'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
         'http_header' => $http_header_browser_fallback,
         'message' => 'URL (PATH) > DEFAULT: no language prefix, UI language is default and the browser language preference setting is not used.',
-      ),
+      ],
       // Language prefix.
-      array(
-        'language_negotiation' => array(LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+      [
+        'language_negotiation' => [LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
         'path' => "$langcode/admin/config",
         'expect' => $language_string,
         'expected_method_id' => LanguageNegotiationUrl::METHOD_ID,
         'http_header' => $http_header_browser_fallback,
         'message' => 'URL (PATH) > DEFAULT: with language prefix, UI language is switched based on path prefix',
-      ),
+      ],
       // Default, go by browser preference.
-      array(
-        'language_negotiation' => array(LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationBrowser::METHOD_ID),
+      [
+        'language_negotiation' => [LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationBrowser::METHOD_ID],
         'path' => 'admin/config',
         'expect' => $language_browser_fallback_string,
         'expected_method_id' => LanguageNegotiationBrowser::METHOD_ID,
         'http_header' => $http_header_browser_fallback,
         'message' => 'URL (PATH) > BROWSER: no language prefix, UI language is determined by browser language preference',
-      ),
+      ],
       // Prefix, switch to the language.
-      array(
-        'language_negotiation' => array(LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationBrowser::METHOD_ID),
+      [
+        'language_negotiation' => [LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationBrowser::METHOD_ID],
         'path' => "$langcode/admin/config",
         'expect' => $language_string,
         'expected_method_id' => LanguageNegotiationUrl::METHOD_ID,
         'http_header' => $http_header_browser_fallback,
         'message' => 'URL (PATH) > BROWSER: with language prefix, UI language is based on path prefix',
-      ),
+      ],
       // Default, browser language preference is not one of site's lang.
-      array(
-        'language_negotiation' => array(LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationBrowser::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+      [
+        'language_negotiation' => [LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationBrowser::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
         'path' => 'admin/config',
         'expect' => $default_string,
         'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
         'http_header' => $http_header_blah,
         'message' => 'URL (PATH) > BROWSER > DEFAULT: no language prefix and browser language preference set to unknown language should use default language',
-      ),
-    );
+      ],
+    ];
 
     foreach ($tests as $test) {
       $this->doRunTest($test);
@@ -224,7 +224,7 @@ function testUILanguageNegotiation() {
     $this->config('language.types')
       ->set('negotiation.' . LanguageInterface::TYPE_INTERFACE . '.enabled', array_flip(array_keys($language_interface_method_definitions)))
       ->save();
-    $this->drupalGet("$langcode_unknown/admin/config", array(), $http_header_browser_fallback);
+    $this->drupalGet("$langcode_unknown/admin/config", [], $http_header_browser_fallback);
     $this->assertResponse(404, "Unknown language path prefix should return 404");
 
     // Set preferred langcode for user to NULL.
@@ -232,14 +232,14 @@ function testUILanguageNegotiation() {
     $account->preferred_langcode = NULL;
     $account->save();
 
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationUser::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationUser::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $default_string,
       'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
-      'http_header' => array(),
+      'http_header' => [],
       'message' => 'USER > DEFAULT: no preferred user language setting, the UI language is default',
-    );
+    ];
     $this->doRunTest($test);
 
     // Set preferred langcode for user to unknown language.
@@ -247,102 +247,102 @@ function testUILanguageNegotiation() {
     $account->preferred_langcode = $langcode_unknown;
     $account->save();
 
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationUser::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationUser::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $default_string,
       'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
-      'http_header' => array(),
+      'http_header' => [],
       'message' => 'USER > DEFAULT: invalid preferred user language setting, the UI language is default',
-    );
+    ];
     $this->doRunTest($test);
 
     // Set preferred langcode for user to non default.
     $account->preferred_langcode = $langcode;
     $account->save();
 
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationUser::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationUser::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $language_string,
       'expected_method_id' => LanguageNegotiationUser::METHOD_ID,
-      'http_header' => array(),
+      'http_header' => [],
       'message' => 'USER > DEFAULT: defined preferred user language setting, the UI language is based on user setting',
-    );
+    ];
     $this->doRunTest($test);
 
     // Set preferred admin langcode for user to NULL.
     $account->preferred_admin_langcode = NULL;
     $account->save();
 
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationUserAdmin::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationUserAdmin::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $default_string,
       'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
-      'http_header' => array(),
+      'http_header' => [],
       'message' => 'USER ADMIN > DEFAULT: no preferred user admin language setting, the UI language is default',
-    );
+    ];
     $this->doRunTest($test);
 
     // Set preferred admin langcode for user to unknown language.
     $account->preferred_admin_langcode = $langcode_unknown;
     $account->save();
 
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationUserAdmin::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationUserAdmin::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $default_string,
       'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
-      'http_header' => array(),
+      'http_header' => [],
       'message' => 'USER ADMIN > DEFAULT: invalid preferred user admin language setting, the UI language is default',
-    );
+    ];
     $this->doRunTest($test);
 
     // Set preferred admin langcode for user to non default.
     $account->preferred_admin_langcode = $langcode;
     $account->save();
 
-    $test = array(
-      'language_negotiation' => array(LanguageNegotiationUserAdmin::METHOD_ID, LanguageNegotiationSelected::METHOD_ID),
+    $test = [
+      'language_negotiation' => [LanguageNegotiationUserAdmin::METHOD_ID, LanguageNegotiationSelected::METHOD_ID],
       'path' => 'admin/config',
       'expect' => $language_string,
       'expected_method_id' => LanguageNegotiationUserAdmin::METHOD_ID,
-      'http_header' => array(),
+      'http_header' => [],
       'message' => 'USER ADMIN > DEFAULT: defined preferred user admin language setting, the UI language is based on user setting',
-    );
+    ];
     $this->doRunTest($test);
 
     // Go by session preference.
     $language_negotiation_session_param = $this->randomMachineName();
-    $edit = array('language_negotiation_session_param' => $language_negotiation_session_param);
+    $edit = ['language_negotiation_session_param' => $language_negotiation_session_param];
     $this->drupalPostForm('admin/config/regional/language/detection/session', $edit, t('Save configuration'));
-    $tests = array(
-      array(
-        'language_negotiation' => array(LanguageNegotiationSession::METHOD_ID),
+    $tests = [
+      [
+        'language_negotiation' => [LanguageNegotiationSession::METHOD_ID],
         'path' => "admin/config",
         'expect' => $default_string,
         'expected_method_id' => LanguageNegotiatorInterface::METHOD_ID,
         'http_header' => $http_header_browser_fallback,
         'message' => 'SESSION > DEFAULT: no language given, the UI language is default',
-      ),
-      array(
-        'language_negotiation' => array(LanguageNegotiationSession::METHOD_ID),
+      ],
+      [
+        'language_negotiation' => [LanguageNegotiationSession::METHOD_ID],
         'path' => 'admin/config',
         'path_options' => ['query' => [$language_negotiation_session_param => $langcode]],
         'expect' => $language_string,
         'expected_method_id' => LanguageNegotiationSession::METHOD_ID,
         'http_header' => $http_header_browser_fallback,
         'message' => 'SESSION > DEFAULT: language given, UI language is determined by session language preference',
-      ),
-    );
+      ],
+    ];
     foreach ($tests as $test) {
       $this->doRunTest($test);
     }
   }
 
   protected function doRunTest($test) {
-    $test += array('path_options' => []);
+    $test += ['path_options' => []];
     if (!empty($test['language_negotiation'])) {
       $method_weights = array_flip($test['language_negotiation']);
       $this->container->get('language_negotiator')->saveConfiguration(LanguageInterface::TYPE_INTERFACE, $method_weights);
@@ -358,7 +358,7 @@ protected function doRunTest($test) {
     $this->container->get('language_manager')->reset();
     $this->drupalGet($test['path'], $test['path_options'], $test['http_header']);
     $this->assertText($test['expect'], $test['message']);
-    $this->assertText(t('Language negotiation method: @name', array('@name' => $test['expected_method_id'])));
+    $this->assertText(t('Language negotiation method: @name', ['@name' => $test['expected_method_id']]));
   }
 
   /**
@@ -372,21 +372,21 @@ function testUrlLanguageFallback() {
 
     // Enable the path prefix for the default language: this way any unprefixed
     // URL must have a valid fallback value.
-    $edit = array('prefix[en]' => 'en');
+    $edit = ['prefix[en]' => 'en'];
     $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, t('Save configuration'));
 
     // Enable browser and URL language detection.
-    $edit = array(
+    $edit = [
       'language_interface[enabled][language-browser]' => TRUE,
       'language_interface[enabled][language-url]' => TRUE,
       'language_interface[weight][language-browser]' => -8,
       'language_interface[weight][language-url]' => -10,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
     $this->drupalGet('admin/config/regional/language/detection');
 
     // Enable the language switcher block.
-    $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_INTERFACE, array('id' => 'test_language_block'));
+    $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_INTERFACE, ['id' => 'test_language_block']);
 
     // Log out, because for anonymous users, the "active" class is set by PHP
     // (which means we can easily test it here), whereas for authenticated users
@@ -398,13 +398,13 @@ function testUrlLanguageFallback() {
 
     // Access the front page without specifying any valid URL language prefix
     // and having as browser language preference a non-default language.
-    $http_header = array("Accept-Language: $langcode_browser_fallback;q=1");
-    $language = new Language(array('id' => ''));
-    $this->drupalGet('', array('language' => $language), $http_header);
+    $http_header = ["Accept-Language: $langcode_browser_fallback;q=1"];
+    $language = new Language(['id' => '']);
+    $this->drupalGet('', ['language' => $language], $http_header);
 
     // Check that the language switcher active link matches the given browser
     // language.
-    $args = array(':id' => 'block-test-language-block', ':url' => \Drupal::url('<front>') . $langcode_browser_fallback);
+    $args = [':id' => 'block-test-language-block', ':url' => \Drupal::url('<front>') . $langcode_browser_fallback];
     $fields = $this->xpath('//div[@id=:id]//a[@class="language-link is-active" and starts-with(@href, :url)]', $args);
     $this->assertTrue($fields[0] == $languages[$langcode_browser_fallback]->getName(), 'The browser language is the URL active language');
 
@@ -428,27 +428,27 @@ function testLanguageDomain() {
     $languages = $this->container->get('language_manager')->getLanguages();
 
     // Enable browser and URL language detection.
-    $edit = array(
+    $edit = [
       'language_interface[enabled][language-url]' => TRUE,
       'language_interface[weight][language-url]' => -10,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Do not allow blank domain.
-    $edit = array(
+    $edit = [
       'language_negotiation_url_part' => LanguageNegotiationUrl::CONFIG_DOMAIN,
       'domain[en]' => '',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, t('Save configuration'));
     $this->assertText('The domain may not be left blank for English', 'The form does not allow blank domains.');
     $this->rebuildContainer();
 
     // Change the domain for the Italian language.
-    $edit = array(
+    $edit = [
       'language_negotiation_url_part' => LanguageNegotiationUrl::CONFIG_DOMAIN,
       'domain[en]' => $base_url_host,
       'domain[it]' => 'it.example.com',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, t('Save configuration'));
     $this->assertText('The configuration options have been saved', 'Domain configuration is saved.');
     $this->rebuildContainer();
@@ -471,19 +471,19 @@ function testLanguageDomain() {
     $italian_url = Url::fromRoute('system.admin', [], ['language' => $languages['it']])->toString();
     $url_scheme = \Drupal::request()->isSecure() ? 'https://' : 'http://';
     $correct_link = $url_scheme . $link;
-    $this->assertEqual($italian_url, $correct_link, format_string('The right URL (@url) in accordance with the chosen language', array('@url' => $italian_url)));
+    $this->assertEqual($italian_url, $correct_link, format_string('The right URL (@url) in accordance with the chosen language', ['@url' => $italian_url]));
 
     // Test HTTPS via options.
     $italian_url = Url::fromRoute('system.admin', [], ['https' => TRUE, 'language' => $languages['it']])->toString();
     $correct_link = 'https://' . $link;
-    $this->assertTrue($italian_url == $correct_link, format_string('The right HTTPS URL (via options) (@url) in accordance with the chosen language', array('@url' => $italian_url)));
+    $this->assertTrue($italian_url == $correct_link, format_string('The right HTTPS URL (via options) (@url) in accordance with the chosen language', ['@url' => $italian_url]));
 
     // Test HTTPS via current URL scheme.
-    $request = Request::create('', 'GET', array(), array(), array(), array('HTTPS' => 'on'));
+    $request = Request::create('', 'GET', [], [], [], ['HTTPS' => 'on']);
     $this->container->get('request_stack')->push($request);
     $italian_url = Url::fromRoute('system.admin', [], ['language' => $languages['it']])->toString();
     $correct_link = 'https://' . $link;
-    $this->assertTrue($italian_url == $correct_link, format_string('The right URL (via current URL scheme) (@url) in accordance with the chosen language', array('@url' => $italian_url)));
+    $this->assertTrue($italian_url == $correct_link, format_string('The right URL (via current URL scheme) (@url) in accordance with the chosen language', ['@url' => $italian_url]));
   }
 
   /**
@@ -491,11 +491,11 @@ function testLanguageDomain() {
    */
   public function testContentCustomization() {
     // Customize content language settings from their defaults.
-    $edit = array(
+    $edit = [
       'language_content[configurable]' => TRUE,
       'language_content[enabled][language-url]' => FALSE,
       'language_content[enabled][language-session]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Check if configurability persisted.
@@ -515,16 +515,16 @@ public function testDisableLanguageSwitcher() {
     $block_id = 'test_language_block';
 
     // Enable the language switcher block.
-    $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_CONTENT, array('id' => $block_id));
+    $this->drupalPlaceBlock('language_block:' . LanguageInterface::TYPE_CONTENT, ['id' => $block_id]);
 
     // Check if the language switcher block has been created.
     $block = Block::load($block_id);
     $this->assertTrue($block, 'Language switcher block was created.');
 
     // Make sure language_content is not configurable.
-    $edit = array(
+    $edit = [
       'language_content[configurable]' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
     $this->assertResponse(200);
 
diff --git a/core/modules/language/src/Tests/LanguageUrlRewritingTest.php b/core/modules/language/src/Tests/LanguageUrlRewritingTest.php
index 5cd80dc4a93e327d5ba7efcd201dc88a3b82e3cd..de1b1a36fdc0227be79c0e69164e5bd2f4645f78 100644
--- a/core/modules/language/src/Tests/LanguageUrlRewritingTest.php
+++ b/core/modules/language/src/Tests/LanguageUrlRewritingTest.php
@@ -21,7 +21,7 @@ class LanguageUrlRewritingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'language_test');
+  public static $modules = ['language', 'language_test'];
 
   /**
    * An user with permissions to administer languages.
@@ -34,16 +34,16 @@ protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $this->webUser = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $this->webUser = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     $this->drupalLogin($this->webUser);
 
     // Install French language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'fr';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Enable URL language detection and selection.
-    $edit = array('language_interface[enabled][language-url]' => 1);
+    $edit = ['language_interface[enabled][language-url]' => 1];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Check that drupalSettings contains path prefix.
@@ -56,7 +56,7 @@ protected function setUp() {
    */
   function testUrlRewritingEdgeCases() {
     // Check URL rewriting with a non-installed language.
-    $non_existing = new Language(array('id' => $this->randomMachineName()));
+    $non_existing = new Language(['id' => $this->randomMachineName()]);
     $this->checkUrl($non_existing, 'Path language is ignored if language is not installed.', 'URL language negotiation does not work with non-installed languages');
 
     // Check that URL rewriting is not applied to subrequests.
@@ -79,9 +79,9 @@ function testUrlRewritingEdgeCases() {
    *   The message to display confirming prefixed URL is not working.
    */
   private function checkUrl(LanguageInterface $language, $message1, $message2) {
-    $options = array('language' => $language, 'script' => '');
+    $options = ['language' => $language, 'script' => ''];
     $base_path = trim(base_path(), '/');
-    $rewritten_path = trim(str_replace($base_path, '', \Drupal::url('<front>', array(), $options)), '/');
+    $rewritten_path = trim(str_replace($base_path, '', \Drupal::url('<front>', [], $options)), '/');
     $segments = explode('/', $rewritten_path, 2);
     $prefix = $segments[0];
     $path = isset($segments[1]) ? $segments[1] : $prefix;
@@ -106,11 +106,11 @@ function testDomainNameNegotiationPort() {
     $language_domain = 'example.fr';
     // Get the current host URI we're running on.
     $base_url_host = parse_url($base_url, PHP_URL_HOST);
-    $edit = array(
+    $edit = [
       'language_negotiation_url_part' => LanguageNegotiationUrl::CONFIG_DOMAIN,
       'domain[en]' => $base_url_host,
       'domain[fr]' => $language_domain
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, t('Save configuration'));
     // Rebuild the container so that the new language gets picked up by services
     // that hold the list of languages.
@@ -126,11 +126,11 @@ function testDomainNameNegotiationPort() {
 
     // In case index.php is part of the URLs, we need to adapt the asserted
     // URLs as well.
-    $index_php = strpos(\Drupal::url('<front>', array(), array('absolute' => TRUE)), 'index.php') !== FALSE;
+    $index_php = strpos(\Drupal::url('<front>', [], ['absolute' => TRUE]), 'index.php') !== FALSE;
 
     $request = Request::createFromGlobals();
     $server = $request->server->all();
-    $request = $this->prepareRequestForGenerator(TRUE, array('HTTP_HOST' => $server['HTTP_HOST'] . ':88'));
+    $request = $this->prepareRequestForGenerator(TRUE, ['HTTP_HOST' => $server['HTTP_HOST'] . ':88']);
 
     // Create an absolute French link.
     $language = \Drupal::languageManager()->getLanguage('fr');
diff --git a/core/modules/language/tests/language_elements_test/src/Form/LanguageConfigurationElement.php b/core/modules/language/tests/language_elements_test/src/Form/LanguageConfigurationElement.php
index 99b2fff277090cc1943616c6e2cbd84ee6b6b03c..4021667055dbcc74c67007a116d20551ea5beda9 100644
--- a/core/modules/language/tests/language_elements_test/src/Form/LanguageConfigurationElement.php
+++ b/core/modules/language/tests/language_elements_test/src/Form/LanguageConfigurationElement.php
@@ -24,19 +24,19 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $conf = ContentLanguageSettings::loadByEntityTypeBundle('entity_test', 'some_bundle');
 
-    $form['lang_configuration'] = array(
+    $form['lang_configuration'] = [
       '#type' => 'language_configuration',
-      '#entity_information' => array(
+      '#entity_information' => [
         'entity_type' => 'entity_test',
         'bundle' => 'some_bundle',
-      ),
+      ],
       '#default_value' => $conf,
-    );
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save',
-    );
+    ];
     $form['#submit'][] = 'language_configuration_element_submit';
     return $form;
   }
diff --git a/core/modules/language/tests/language_elements_test/src/Form/LanguageConfigurationElementTest.php b/core/modules/language/tests/language_elements_test/src/Form/LanguageConfigurationElementTest.php
index 0aa6c4975b70067234c2ce0256147c9cd54b707b..f0fe8c51e5a09a8f187e561d8de078846f97a0e5 100644
--- a/core/modules/language/tests/language_elements_test/src/Form/LanguageConfigurationElementTest.php
+++ b/core/modules/language/tests/language_elements_test/src/Form/LanguageConfigurationElementTest.php
@@ -21,11 +21,11 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['langcode'] = array(
+    $form['langcode'] = [
       '#title' => t('Language select'),
       '#type' => 'language_select',
       '#default_value' => language_get_default_langcode('entity_test', 'some_bundle'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/language/tests/language_test/language_test.module b/core/modules/language/tests/language_test/language_test.module
index 4803202f2610bb5611656ec28e5cccdb2e825475..5ea9c360bd46351300bdeb8175dd54e1d8297569 100644
--- a/core/modules/language/tests/language_test/language_test.module
+++ b/core/modules/language/tests/language_test/language_test.module
@@ -15,7 +15,7 @@
 function language_test_page_top() {
   if (\Drupal::moduleHandler()->moduleExists('language')) {
     language_test_store_language_negotiation();
-    drupal_set_message(t('Language negotiation method: @name', array('@name' => \Drupal::languageManager()->getNegotiatedLanguageMethod())));
+    drupal_set_message(t('Language negotiation method: @name', ['@name' => \Drupal::languageManager()->getNegotiatedLanguageMethod()]));
   }
 }
 
@@ -24,16 +24,16 @@ function language_test_page_top() {
  */
 function language_test_language_types_info() {
   if (\Drupal::state()->get('language_test.language_types')) {
-    return array(
-      'test_language_type' => array(
+    return [
+      'test_language_type' => [
         'name' => t('Test'),
         'description' => t('A test language type.'),
-      ),
-      'fixed_test_language_type' => array(
-        'fixed' => array('test_language_negotiation_method'),
+      ],
+      'fixed_test_language_type' => [
+        'fixed' => ['test_language_negotiation_method'],
         'locked' => TRUE,
-      ),
-    );
+      ],
+    ];
   }
 }
 
@@ -68,7 +68,7 @@ function language_test_language_negotiation_info_alter(array &$negotiation_info)
  * Store the last negotiated languages.
  */
 function language_test_store_language_negotiation() {
-  $last = array();
+  $last = [];
   foreach (\Drupal::languageManager()->getDefinedLanguageTypes() as $type) {
     $last[$type] = \Drupal::languageManager()->getCurrentLanguage($type)->getId();
   }
diff --git a/core/modules/language/tests/language_test/src/Controller/LanguageTestController.php b/core/modules/language/tests/language_test/src/Controller/LanguageTestController.php
index 136d8eba60dded3e56d2b1a016dbbf36cc4da6a0..441b2eb872750a1fc9868a6f8c62140cdac82165 100644
--- a/core/modules/language/tests/language_test/src/Controller/LanguageTestController.php
+++ b/core/modules/language/tests/language_test/src/Controller/LanguageTestController.php
@@ -60,7 +60,7 @@ public static function create(ContainerInterface $container) {
    *   Testing feedback based on (translated) entity title.
    */
   public function testEntity(ConfigurableLanguageInterface $configurable_language) {
-    return array('#markup' => $this->t('Loaded %label.', array('%label' => $configurable_language->label())));
+    return ['#markup' => $this->t('Loaded %label.', ['%label' => $configurable_language->label()])];
   }
 
   /**
@@ -72,43 +72,43 @@ public function testEntity(ConfigurableLanguageInterface $configurable_language)
   public function typeLinkActiveClass() {
     // We assume that 'en' and 'fr' have been configured.
     $languages = $this->languageManager->getLanguages();
-    return array(
-      'no_language' => array(
+    return [
+      'no_language' => [
         '#type' => 'link',
         '#title' => t('Link to the current path with no langcode provided.'),
         '#url' => Url::fromRoute('<current>'),
-        '#options' => array(
-          'attributes' => array(
+        '#options' => [
+          'attributes' => [
             'id' => 'no_lang_link',
-          ),
+          ],
           'set_active_class' => TRUE,
-        ),
-      ),
-      'fr' => array(
+        ],
+      ],
+      'fr' => [
         '#type' => 'link',
         '#title' => t('Link to a French version of the current path.'),
         '#url' => Url::fromRoute('<current>'),
-        '#options' => array(
+        '#options' => [
           'language' => $languages['fr'],
-          'attributes' => array(
+          'attributes' => [
             'id' => 'fr_link',
-          ),
+          ],
           'set_active_class' => TRUE,
-        ),
-      ),
-      'en' => array(
+        ],
+      ],
+      'en' => [
         '#type' => 'link',
         '#title' => t('Link to an English version of the current path.'),
         '#url' => Url::fromRoute('<current>'),
-        '#options' => array(
+        '#options' => [
           'language' => $languages['en'],
-          'attributes' => array(
+          'attributes' => [
             'id' => 'en_link',
-          ),
+          ],
           'set_active_class' => TRUE,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -130,7 +130,7 @@ public function testSubRequest() {
     else {
       $base_path = $request->getBasePath();
     }
-    $sub_request = Request::create($base_path . '/user', 'GET', $request->query->all(), $request->cookies->all(), array(), $server);
+    $sub_request = Request::create($base_path . '/user', 'GET', $request->query->all(), $request->cookies->all(), [], $server);
     return $this->httpKernel->handle($sub_request, HttpKernelInterface::SUB_REQUEST);
   }
 
diff --git a/core/modules/language/tests/src/Functional/AdminPathEntityConverterLanguageTest.php b/core/modules/language/tests/src/Functional/AdminPathEntityConverterLanguageTest.php
index bd46a4057337dabce5cfc36f90d63bc9b0503835..f689a9233fee9e6b36c52e896fa8e6ade99d1d8a 100644
--- a/core/modules/language/tests/src/Functional/AdminPathEntityConverterLanguageTest.php
+++ b/core/modules/language/tests/src/Functional/AdminPathEntityConverterLanguageTest.php
@@ -12,14 +12,14 @@
  */
 class AdminPathEntityConverterLanguageTest extends BrowserTestBase {
 
-  public static $modules = array('language', 'language_test');
+  public static $modules = ['language', 'language_test'];
 
   protected function setUp() {
     parent::setUp();
-    $permissions = array(
+    $permissions = [
       'access administration pages',
       'administer site configuration',
-    );
+    ];
     $this->drupalLogin($this->drupalCreateUser($permissions));
     ConfigurableLanguage::createFromLangcode('es')->save();
   }
@@ -34,12 +34,12 @@ public function testConfigUsingCurrentLanguage() {
       ->save();
 
     $this->drupalGet('es/admin/language_test/entity_using_current_language/es');
-    $this->assertNoRaw(t('Loaded %label.', array('%label' => 'Spanish')));
-    $this->assertRaw(t('Loaded %label.', array('%label' => 'Español')));
+    $this->assertNoRaw(t('Loaded %label.', ['%label' => 'Spanish']));
+    $this->assertRaw(t('Loaded %label.', ['%label' => 'Español']));
 
     $this->drupalGet('es/admin/language_test/entity_using_original_language/es');
-    $this->assertRaw(t('Loaded %label.', array('%label' => 'Spanish')));
-    $this->assertNoRaw(t('Loaded %label.', array('%label' => 'Español')));
+    $this->assertRaw(t('Loaded %label.', ['%label' => 'Spanish']));
+    $this->assertNoRaw(t('Loaded %label.', ['%label' => 'Español']));
   }
 
 }
diff --git a/core/modules/language/tests/src/Functional/LanguageBlockSettingsVisibilityTest.php b/core/modules/language/tests/src/Functional/LanguageBlockSettingsVisibilityTest.php
index 3090d5bf50cb8aa470433d1f9f841c64fb62ffcf..003c5a63fa60b5eeedb040ed4845231e58033ff1 100644
--- a/core/modules/language/tests/src/Functional/LanguageBlockSettingsVisibilityTest.php
+++ b/core/modules/language/tests/src/Functional/LanguageBlockSettingsVisibilityTest.php
@@ -11,12 +11,12 @@
  */
 class LanguageBlockSettingsVisibilityTest extends BrowserTestBase {
 
-  public static $modules = array('block', 'language');
+  public static $modules = ['block', 'language'];
 
   public function testUnnecessaryLanguageSettingsVisibility() {
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages', 'administer blocks'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages', 'administer blocks']);
     $this->drupalLogin($admin_user);
-    $this->drupalPostForm('admin/config/regional/language/add', array('predefined_langcode' => 'hu'), t('Add language'));
+    $this->drupalPostForm('admin/config/regional/language/add', ['predefined_langcode' => 'hu'], t('Add language'));
     $this->drupalGet('admin/structure/block/add/system_menu_block:admin/stark');
     $this->assertNoFieldByXPath('//input[@id="edit-visibility-language-langcodes-und"]', NULL, '\'Not specified\' option does not appear at block config, language settings section.');
     $this->assertNoFieldByXpath('//input[@id="edit-visibility-language-langcodes-zxx"]', NULL, '\'Not applicable\' option does not appear at block config, language settings section.');
diff --git a/core/modules/language/tests/src/Functional/LanguageBrowserDetectionTest.php b/core/modules/language/tests/src/Functional/LanguageBrowserDetectionTest.php
index 1b1382afe131dc171f62eb384a70664d46ac705e..b32909b9a50cb828af4472584df641ec95e5e955 100644
--- a/core/modules/language/tests/src/Functional/LanguageBrowserDetectionTest.php
+++ b/core/modules/language/tests/src/Functional/LanguageBrowserDetectionTest.php
@@ -11,7 +11,7 @@
  */
 class LanguageBrowserDetectionTest extends BrowserTestBase {
 
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Tests for adding, editing and deleting mappings between browser language
@@ -19,7 +19,7 @@ class LanguageBrowserDetectionTest extends BrowserTestBase {
    */
   function testUIBrowserLanguageMappings() {
     // User to manage languages.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     $this->drupalLogin($admin_user);
 
     // Check that the configure link exists.
@@ -34,19 +34,19 @@ function testUIBrowserLanguageMappings() {
     // Delete zh-cn language code.
     $browser_langcode = 'zh-cn';
     $this->drupalGet('admin/config/regional/language/detection/browser/delete/' . $browser_langcode);
-    $message = t('Are you sure you want to delete @browser_langcode?', array(
+    $message = t('Are you sure you want to delete @browser_langcode?', [
       '@browser_langcode' => $browser_langcode,
-    ));
+    ]);
     $this->assertRaw($message);
 
     // Confirm the delete.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('admin/config/regional/language/detection/browser/delete/' . $browser_langcode, $edit, t('Confirm'));
 
     // We need raw here because %browser will add HTML.
-    $t_args = array(
+    $t_args = [
       '%browser' => $browser_langcode,
-    );
+    ];
     $this->assertRaw(t('The mapping for the %browser browser language code has been deleted.', $t_args), 'The test browser language code has been deleted.');
 
     // Check we went back to the browser negotiation mapping overview.
@@ -55,10 +55,10 @@ function testUIBrowserLanguageMappings() {
     $this->assertNoField('edit-mappings-zh-cn-browser-langcode', 'Chinese browser language code no longer exists.');
 
     // Add a new custom mapping.
-    $edit = array(
+    $edit = [
       'new_mapping[browser_langcode]' => 'xx',
       'new_mapping[drupal_langcode]' => 'en',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection/browser', $edit, t('Save configuration'));
     $this->assertUrl(\Drupal::url('language.negotiation_browser', [], ['absolute' => TRUE]));
     $this->assertField('edit-mappings-xx-browser-langcode', 'xx', 'Browser language code found.');
@@ -69,18 +69,18 @@ function testUIBrowserLanguageMappings() {
     $this->assertText('Browser language codes must be unique.');
 
     // Change browser language code of our custom mapping to zh-sg.
-    $edit = array(
+    $edit = [
       'mappings[xx][browser_langcode]' => 'zh-sg',
       'mappings[xx][drupal_langcode]' => 'en',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection/browser', $edit, t('Save configuration'));
     $this->assertText(t('Browser language codes must be unique.'));
 
     // Change Drupal language code of our custom mapping to zh-hans.
-    $edit = array(
+    $edit = [
       'mappings[xx][browser_langcode]' => 'xx',
       'mappings[xx][drupal_langcode]' => 'zh-hans',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection/browser', $edit, t('Save configuration'));
     $this->assertUrl(\Drupal::url('language.negotiation_browser', [], ['absolute' => TRUE]));
     $this->assertField('edit-mappings-xx-browser-langcode', 'xx', 'Browser language code found.');
diff --git a/core/modules/language/tests/src/Functional/LanguageConfigOverrideImportTest.php b/core/modules/language/tests/src/Functional/LanguageConfigOverrideImportTest.php
index 76d97fb2919ae44afd00f632362c6ed54c96cbb8..2ddd4963ed3e10c109f5cde596bd4c334e27c40e 100644
--- a/core/modules/language/tests/src/Functional/LanguageConfigOverrideImportTest.php
+++ b/core/modules/language/tests/src/Functional/LanguageConfigOverrideImportTest.php
@@ -17,7 +17,7 @@ class LanguageConfigOverrideImportTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'config', 'locale', 'config_translation');
+  public static $modules = ['language', 'config', 'locale', 'config_translation'];
 
   /**
    * Tests that language can be enabled and overrides are created during a sync.
@@ -31,7 +31,7 @@ public function testConfigOverrideImport() {
     // Uninstall the language module and its dependencies so we can test
     // enabling the language module and creating overrides at the same time
     // during a configuration synchronization.
-    \Drupal::service('module_installer')->uninstall(array('language'));
+    \Drupal::service('module_installer')->uninstall(['language']);
     // Ensure that the current site has no overrides registered to the
     // ConfigFactory.
     $this->rebuildContainer();
@@ -39,8 +39,8 @@ public function testConfigOverrideImport() {
     /* @var \Drupal\Core\Config\StorageInterface $override_sync */
     $override_sync = $sync->createCollection('language.fr');
     // Create some overrides in sync.
-    $override_sync->write('system.site', array('name' => 'FR default site name'));
-    $override_sync->write('system.maintenance', array('message' => 'FR message: @site is currently under maintenance. We should be back shortly. Thank you for your patience'));
+    $override_sync->write('system.site', ['name' => 'FR default site name']);
+    $override_sync->write('system.maintenance', ['message' => 'FR message: @site is currently under maintenance. We should be back shortly. Thank you for your patience']);
 
     $this->configImporter()->import();
     $this->rebuildContainer();
@@ -61,7 +61,7 @@ public function testConfigOverrideImport() {
    */
   public function testConfigOverrideImportEvents() {
     // Enable the config_events_test module so we can record events occurring.
-    \Drupal::service('module_installer')->install(array('config_events_test'));
+    \Drupal::service('module_installer')->install(['config_events_test']);
     $this->rebuildContainer();
 
     ConfigurableLanguage::createFromLangcode('fr')->save();
@@ -73,7 +73,7 @@ public function testConfigOverrideImportEvents() {
     /* @var \Drupal\Core\Config\StorageInterface $override_sync */
     $override_sync = $sync->createCollection('language.fr');
     // Create some overrides in sync.
-    $override_sync->write('system.site', array('name' => 'FR default site name'));
+    $override_sync->write('system.site', ['name' => 'FR default site name']);
     \Drupal::state()->set('config_events_test.event', FALSE);
 
     $this->configImporter()->import();
diff --git a/core/modules/language/tests/src/Functional/LanguageConfigSchemaTest.php b/core/modules/language/tests/src/Functional/LanguageConfigSchemaTest.php
index 12a6843ce2786e8b3016db66b4e81d58b0108f34..200131a80c8f63a6f1fff06746c64cad0966107a 100644
--- a/core/modules/language/tests/src/Functional/LanguageConfigSchemaTest.php
+++ b/core/modules/language/tests/src/Functional/LanguageConfigSchemaTest.php
@@ -19,7 +19,7 @@ class LanguageConfigSchemaTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'menu_link_content');
+  public static $modules = ['language', 'menu_link_content'];
 
   /**
    * A user with administrative permissions.
@@ -35,7 +35,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create user.
-    $this->adminUser = $this->drupalCreateUser(array('administer languages'));
+    $this->adminUser = $this->drupalCreateUser(['administer languages']);
     $this->drupalLogin($this->adminUser);
   }
 
diff --git a/core/modules/language/tests/src/Functional/LanguageListModuleInstallTest.php b/core/modules/language/tests/src/Functional/LanguageListModuleInstallTest.php
index fccc200c61f1d90bf7e28621ea6e5b7c4b709e41..bcd664db9f4e1bc9294bd863d091b2f5a4830aac 100644
--- a/core/modules/language/tests/src/Functional/LanguageListModuleInstallTest.php
+++ b/core/modules/language/tests/src/Functional/LanguageListModuleInstallTest.php
@@ -17,7 +17,7 @@ class LanguageListModuleInstallTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('language_test');
+  public static $modules = ['language_test'];
 
   /**
    * Tests enabling Language.
@@ -25,9 +25,9 @@ class LanguageListModuleInstallTest extends BrowserTestBase {
   function testModuleInstallLanguageList() {
     // Since LanguageManager::getLanguages() uses static caches we need to do
     // this by enabling the module using the UI.
-    $admin_user = $this->drupalCreateUser(array('access administration pages', 'administer modules'));
+    $admin_user = $this->drupalCreateUser(['access administration pages', 'administer modules']);
     $this->drupalLogin($admin_user);
-    $edit = array();
+    $edit = [];
     $edit['modules[language][enable]'] = 'language';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
 
diff --git a/core/modules/language/tests/src/Functional/LanguageNegotiationContentEntityTest.php b/core/modules/language/tests/src/Functional/LanguageNegotiationContentEntityTest.php
index 899143782266e308edf17ad017f49e282b9f664a..27785c09529201c2753e04ce61ef5f7dac829a18 100644
--- a/core/modules/language/tests/src/Functional/LanguageNegotiationContentEntityTest.php
+++ b/core/modules/language/tests/src/Functional/LanguageNegotiationContentEntityTest.php
@@ -25,7 +25,7 @@ class LanguageNegotiationContentEntityTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'language_test', 'entity_test', 'system');
+  public static $modules = ['language', 'language_test', 'entity_test', 'system'];
 
   /**
    * The entity being used for testing.
@@ -49,7 +49,7 @@ protected function setUp() {
 
     $this->createTranslatableEntity();
 
-    $user = $this->drupalCreateUser(array('view test entity'));
+    $user = $this->drupalCreateUser(['view test entity']);
     $this->drupalLogin($user);
   }
 
diff --git a/core/modules/language/tests/src/Functional/LanguageNegotiationInfoTest.php b/core/modules/language/tests/src/Functional/LanguageNegotiationInfoTest.php
index 3dd037464b3be3020e2dd281e8da709620a8726f..ebcd58071864946c3b4b89e8ca96b305a0e9b915 100644
--- a/core/modules/language/tests/src/Functional/LanguageNegotiationInfoTest.php
+++ b/core/modules/language/tests/src/Functional/LanguageNegotiationInfoTest.php
@@ -27,7 +27,7 @@ protected function setUp() {
     parent::setUp();
     $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages', 'view the administration theme', 'administer modules']);
     $this->drupalLogin($admin_user);
-    $this->drupalPostForm('admin/config/regional/language/add', array('predefined_langcode' => 'it'), t('Add language'));
+    $this->drupalPostForm('admin/config/regional/language/add', ['predefined_langcode' => 'it'], t('Add language'));
   }
 
   /**
@@ -62,15 +62,15 @@ protected function stateSet(array $values) {
    * Tests alterations to language types/negotiation info.
    */
   function testInfoAlterations() {
-    $this->stateSet(array(
+    $this->stateSet([
       // Enable language_test type info.
       'language_test.language_types' => TRUE,
       // Enable language_test negotiation info (not altered yet).
       'language_test.language_negotiation_info' => TRUE,
       // Alter LanguageInterface::TYPE_CONTENT to be configurable.
       'language_test.content_language_type' => TRUE,
-    ));
-    $this->container->get('module_installer')->install(array('language_test'));
+    ]);
+    $this->container->get('module_installer')->install(['language_test']);
     $this->resetAll();
 
     // Check that fixed language types are properly configured without the need
@@ -87,19 +87,19 @@ function testInfoAlterations() {
     $interface_method_id = LanguageNegotiationUI::METHOD_ID;
     $test_method_id = 'test_language_negotiation_method';
     $form_field = $type . '[enabled][' . $interface_method_id . ']';
-    $edit = array(
+    $edit = [
       $form_field => TRUE,
       $type . '[enabled][' . $test_method_id . ']' => TRUE,
       $test_type . '[enabled][' . $test_method_id . ']' => TRUE,
       $test_type . '[configurable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Alter language negotiation info to remove interface language negotiation
     // method.
-    $this->stateSet(array(
+    $this->stateSet([
       'language_test.language_negotiation_info_alter' => TRUE,
-    ));
+    ]);
 
     $negotiation = $this->config('language.types')->get('negotiation.' . $type . '.enabled');
     $this->assertFalse(isset($negotiation[$interface_method_id]), 'Interface language negotiation method removed from the stored settings.');
@@ -112,10 +112,10 @@ function testInfoAlterations() {
     foreach ($this->languageManager()->getLanguageTypes() as $type) {
       $form_field = $type . '[enabled][test_language_negotiation_method_ts]';
       if ($type == $test_type) {
-        $this->assertFieldByName($form_field, NULL, format_string('Type-specific test language negotiation method available for %type.', array('%type' => $type)));
+        $this->assertFieldByName($form_field, NULL, format_string('Type-specific test language negotiation method available for %type.', ['%type' => $type]));
       }
       else {
-        $this->assertNoFieldByName($form_field, NULL, format_string('Type-specific test language negotiation method unavailable for %type.', array('%type' => $type)));
+        $this->assertNoFieldByName($form_field, NULL, format_string('Type-specific test language negotiation method unavailable for %type.', ['%type' => $type]));
       }
     }
 
@@ -125,17 +125,17 @@ function testInfoAlterations() {
     foreach ($this->languageManager()->getDefinedLanguageTypes() as $type) {
       $langcode = $last[$type];
       $value = $type == LanguageInterface::TYPE_CONTENT || strpos($type, 'test') !== FALSE ? 'it' : 'en';
-      $this->assertEqual($langcode, $value, format_string('The negotiated language for %type is %language', array('%type' => $type, '%language' => $value)));
+      $this->assertEqual($langcode, $value, format_string('The negotiated language for %type is %language', ['%type' => $type, '%language' => $value]));
     }
 
     // Uninstall language_test and check that everything is set back to the
     // original status.
-    $this->container->get('module_installer')->uninstall(array('language_test'));
+    $this->container->get('module_installer')->uninstall(['language_test']);
     $this->rebuildContainer();
 
     // Check that only the core language types are available.
     foreach ($this->languageManager()->getDefinedLanguageTypes() as $type) {
-      $this->assertTrue(strpos($type, 'test') === FALSE, format_string('The %type language is still available', array('%type' => $type)));
+      $this->assertTrue(strpos($type, 'test') === FALSE, format_string('The %type language is still available', ['%type' => $type]));
     }
 
     // Check that fixed language types are properly configured, even those
@@ -165,7 +165,7 @@ protected function checkFixedLanguageTypes() {
           list(, $info_id) = each($info['fixed']);
           $equal = $info_id == $id;
         }
-        $this->assertTrue($equal, format_string('language negotiation for %type is properly set up', array('%type' => $type)));
+        $this->assertTrue($equal, format_string('language negotiation for %type is properly set up', ['%type' => $type]));
       }
     }
   }
diff --git a/core/modules/language/tests/src/Functional/LanguagePathMonolingualTest.php b/core/modules/language/tests/src/Functional/LanguagePathMonolingualTest.php
index 681b378d692443941dd58cb431c1565b2d38d27d..952f748ba17602cc3c814bc809ec73bc42b4532e 100644
--- a/core/modules/language/tests/src/Functional/LanguagePathMonolingualTest.php
+++ b/core/modules/language/tests/src/Functional/LanguagePathMonolingualTest.php
@@ -22,22 +22,22 @@ protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $web_user = $this->drupalCreateUser(array('administer languages', 'access administration pages', 'administer site configuration'));
+    $web_user = $this->drupalCreateUser(['administer languages', 'access administration pages', 'administer site configuration']);
     $this->drupalLogin($web_user);
 
     // Enable French language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'fr';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Make French the default language.
-    $edit = array(
+    $edit = [
       'site_default_language' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language', $edit, t('Save configuration'));
 
     // Delete English.
-    $this->drupalPostForm('admin/config/regional/language/delete/en', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/language/delete/en', [], t('Delete'));
 
     // Changing the default language causes a container rebuild. Therefore need
     // to rebuild the container in the test environment.
@@ -49,7 +49,7 @@ protected function setUp() {
     $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage()->getId(), 'fr', 'French is the default language');
 
     // Set language detection to URL.
-    $edit = array('language_interface[enabled][language-url]' => TRUE);
+    $edit = ['language_interface[enabled][language-url]' => TRUE];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
     $this->drupalPlaceBlock('local_actions_block');
   }
diff --git a/core/modules/language/tests/src/Kernel/Condition/LanguageConditionTest.php b/core/modules/language/tests/src/Kernel/Condition/LanguageConditionTest.php
index 92b2a04f272b411dfbff9ce7fead7f0d3e322760..af7eed4b7f50ec58349878678ac949b4ca518795 100644
--- a/core/modules/language/tests/src/Kernel/Condition/LanguageConditionTest.php
+++ b/core/modules/language/tests/src/Kernel/Condition/LanguageConditionTest.php
@@ -32,12 +32,12 @@ class LanguageConditionTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'language');
+  public static $modules = ['system', 'language'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->installConfig(array('language'));
+    $this->installConfig(['language']);
     // Setup Italian.
     ConfigurableLanguage::createFromLangcode('it')->save();
 
@@ -52,14 +52,14 @@ public function testConditions() {
     // language.
     $language = \Drupal::languageManager()->getLanguage('en');
     $condition = $this->manager->createInstance('language')
-      ->setConfig('langcodes', array('en' => 'en', 'it' => 'it'))
+      ->setConfig('langcodes', ['en' => 'en', 'it' => 'it'])
       ->setContextValue('language', $language);
     $this->assertTrue($condition->execute(), 'Language condition passes as expected.');
     // Check for the proper summary.
     $this->assertEqual($condition->summary(), 'The language is English, Italian.');
 
     // Change to Italian only.
-    $condition->setConfig('langcodes', array('it' => 'it'));
+    $condition->setConfig('langcodes', ['it' => 'it']);
     $this->assertFalse($condition->execute(), 'Language condition fails as expected.');
     // Check for the proper summary.
     $this->assertEqual($condition->summary(), 'The language is Italian.');
@@ -74,7 +74,7 @@ public function testConditions() {
     $language = \Drupal::languageManager()->getLanguage('it');
 
     $condition = $this->manager->createInstance('language')
-      ->setConfig('langcodes', array('en' => 'en', 'it' => 'it'))
+      ->setConfig('langcodes', ['en' => 'en', 'it' => 'it'])
       ->setContextValue('language', $language);
 
     $this->assertTrue($condition->execute(), 'Language condition passes as expected.');
@@ -82,7 +82,7 @@ public function testConditions() {
     $this->assertEqual($condition->summary(), 'The language is English, Italian.');
 
     // Change to Italian only.
-    $condition->setConfig('langcodes', array('it' => 'it'));
+    $condition->setConfig('langcodes', ['it' => 'it']);
     $this->assertTrue($condition->execute(), 'Language condition passes as expected.');
     // Check for the proper summary.
     $this->assertEqual($condition->summary(), 'The language is Italian.');
diff --git a/core/modules/language/tests/src/Kernel/ConfigurableLanguageManagerTest.php b/core/modules/language/tests/src/Kernel/ConfigurableLanguageManagerTest.php
index dae3a585c83776fc6d3d2c36a23ed410983d1e35..92ab889ce8e96e45314999b57a72d39789264fa8 100644
--- a/core/modules/language/tests/src/Kernel/ConfigurableLanguageManagerTest.php
+++ b/core/modules/language/tests/src/Kernel/ConfigurableLanguageManagerTest.php
@@ -16,7 +16,7 @@ class ConfigurableLanguageManagerTest extends LanguageTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('user');
+  public static $modules = ['user'];
 
   /**
    * The language negotiator.
diff --git a/core/modules/language/tests/src/Kernel/ConfigurableLanguageTest.php b/core/modules/language/tests/src/Kernel/ConfigurableLanguageTest.php
index a87a6e3f9e301ce9a68aa61b5b56be4bf3fcfa43..00af14cbd373645972f444cb4ce010074d9e0a43 100644
--- a/core/modules/language/tests/src/Kernel/ConfigurableLanguageTest.php
+++ b/core/modules/language/tests/src/Kernel/ConfigurableLanguageTest.php
@@ -18,7 +18,7 @@ class ConfigurableLanguageTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Tests configurable language name methods.
@@ -26,7 +26,7 @@ class ConfigurableLanguageTest extends KernelTestBase {
   public function testName() {
     $name = $this->randomMachineName();
     $language_code = $this->randomMachineName(2);
-    $configurableLanguage = new ConfigurableLanguage(array('label' => $name, 'id' => $language_code), 'configurable_language');
+    $configurableLanguage = new ConfigurableLanguage(['label' => $name, 'id' => $language_code], 'configurable_language');
     $this->assertEqual($configurableLanguage->getName(), $name);
     $this->assertEqual($configurableLanguage->setName('Test language')->getName(), 'Test language');
   }
diff --git a/core/modules/language/tests/src/Kernel/EntityDefaultLanguageTest.php b/core/modules/language/tests/src/Kernel/EntityDefaultLanguageTest.php
index 84368b70f64f7a6209cb3a9997bc3dc715223853..88abdd9006dd3767d77649362350e4cee0c6be9c 100644
--- a/core/modules/language/tests/src/Kernel/EntityDefaultLanguageTest.php
+++ b/core/modules/language/tests/src/Kernel/EntityDefaultLanguageTest.php
@@ -18,7 +18,7 @@ class EntityDefaultLanguageTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'node', 'field', 'text', 'user', 'system');
+  public static $modules = ['language', 'node', 'field', 'text', 'user', 'system'];
 
   /**
    * {@inheritdoc}
@@ -29,9 +29,9 @@ protected function setUp() {
     $this->installEntitySchema('user');
 
     // Activate Spanish language, so there are two languages activated.
-    $language = $this->container->get('entity.manager')->getStorage('configurable_language')->create(array(
+    $language = $this->container->get('entity.manager')->getStorage('configurable_language')->create([
       'id' => 'es',
-    ));
+    ]);
     $language->save();
 
     // Create a new content type which has Undefined language by default.
@@ -67,7 +67,7 @@ public function testEntityTranslationDefaultLanguageViaCode() {
     $this->assertEqual($node->langcode->value, 'en');
 
     // Disable language module.
-    $this->disableModules(array('language'));
+    $this->disableModules(['language']);
 
     // With language module disabled, and a content type that is configured to
     // have no language specified by default, a new node of this content type
@@ -101,12 +101,12 @@ public function testEntityTranslationDefaultLanguageViaCode() {
    *   Default language code of the nodes of this type.
    */
   protected function createContentType($name, $langcode) {
-    $content_type = $this->container->get('entity.manager')->getStorage('node_type')->create(array(
+    $content_type = $this->container->get('entity.manager')->getStorage('node_type')->create([
       'name' => 'Test ' . $name,
       'title_label' => 'Title',
       'type' => $name,
       'create_body' => FALSE,
-    ));
+    ]);
     $content_type->save();
     ContentLanguageSettings::loadByEntityTypeBundle('node', $name)
       ->setLanguageAlterable(FALSE)
@@ -127,10 +127,10 @@ protected function createContentType($name, $langcode) {
    *   The node created.
    */
   protected function createNode($type, $langcode = NULL) {
-    $values = array(
+    $values = [
       'type' => $type,
       'title' => $this->randomString(),
-    );
+    ];
     if (!empty($langcode)) {
       $values['langcode'] = $langcode;
     }
diff --git a/core/modules/language/tests/src/Kernel/LanguageConfigFactoryOverrideTest.php b/core/modules/language/tests/src/Kernel/LanguageConfigFactoryOverrideTest.php
index b8b31a96b934917a8561ca928b9712795f7dcea2..3082697b04274f7a7a34dc3be107698374de99c5 100644
--- a/core/modules/language/tests/src/Kernel/LanguageConfigFactoryOverrideTest.php
+++ b/core/modules/language/tests/src/Kernel/LanguageConfigFactoryOverrideTest.php
@@ -17,7 +17,7 @@ class LanguageConfigFactoryOverrideTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'language');
+  public static $modules = ['system', 'language'];
 
   /**
    * Tests language.config_factory_override service has the default language.
diff --git a/core/modules/language/tests/src/Kernel/LanguageConfigOverrideInstallTest.php b/core/modules/language/tests/src/Kernel/LanguageConfigOverrideInstallTest.php
index c01187c9e37d35c380077688c26951200d5cbe56..7d505baf78fbda7ee556b5e37fcb7057093a9e7e 100644
--- a/core/modules/language/tests/src/Kernel/LanguageConfigOverrideInstallTest.php
+++ b/core/modules/language/tests/src/Kernel/LanguageConfigOverrideInstallTest.php
@@ -17,7 +17,7 @@ class LanguageConfigOverrideInstallTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'config_events_test');
+  public static $modules = ['language', 'config_events_test'];
 
   /**
    * Tests the configuration events are not fired during install of overrides.
@@ -26,9 +26,9 @@ public function testLanguageConfigOverrideInstall() {
     ConfigurableLanguage::createFromLangcode('de')->save();
     // Need to enable test module after creating the language otherwise saving
     // the language will install the configuration.
-    $this->enableModules(array('language_config_override_test'));
+    $this->enableModules(['language_config_override_test']);
     \Drupal::state()->set('config_events_test.event', FALSE);
-    $this->installConfig(array('language_config_override_test'));
+    $this->installConfig(['language_config_override_test']);
     $event_recorder = \Drupal::state()->get('config_events_test.event', FALSE);
     $this->assertFalse($event_recorder);
     $config = \Drupal::service('language.config_factory_override')->getOverride('de', 'language_config_override_test.settings');
diff --git a/core/modules/language/tests/src/Kernel/LanguageDependencyInjectionTest.php b/core/modules/language/tests/src/Kernel/LanguageDependencyInjectionTest.php
index 74b167f3c4aed26ff012a4608c12d022d517438d..d41d19e2feff52da9cc862d8d78452351fc34874 100644
--- a/core/modules/language/tests/src/Kernel/LanguageDependencyInjectionTest.php
+++ b/core/modules/language/tests/src/Kernel/LanguageDependencyInjectionTest.php
@@ -22,7 +22,7 @@ function testDependencyInjectedNewLanguage() {
     $expected = $this->languageManager->getDefaultLanguage();
     $result = $this->languageManager->getCurrentLanguage();
     foreach ($expected as $property => $value) {
-      $this->assertEqual($expected->$property, $result->$property, format_string('The dependency injected language object %prop property equals the new Language object %prop property.', array('%prop' => $property)));
+      $this->assertEqual($expected->$property, $result->$property, format_string('The dependency injected language object %prop property equals the new Language object %prop property.', ['%prop' => $property]));
     }
   }
 
@@ -45,7 +45,7 @@ function testDependencyInjectedNewDefaultLanguage() {
 
     // Delete the language to check that we fallback to the default.
     try {
-      entity_delete_multiple('configurable_language', array('fr'));
+      entity_delete_multiple('configurable_language', ['fr']);
       $this->fail('Expected DeleteDefaultLanguageException thrown.');
     }
     catch (DeleteDefaultLanguageException $e) {
@@ -55,7 +55,7 @@ function testDependencyInjectedNewDefaultLanguage() {
     // Re-save the previous default language and the delete should work.
     $this->config('system.site')->set('default_langcode', $default_language->getId())->save();
 
-    entity_delete_multiple('configurable_language', array('fr'));
+    entity_delete_multiple('configurable_language', ['fr']);
     $result = \Drupal::languageManager()->getCurrentLanguage();
     $this->assertIdentical($result->getId(), $default_language->getId());
   }
diff --git a/core/modules/language/tests/src/Kernel/LanguageFallbackTest.php b/core/modules/language/tests/src/Kernel/LanguageFallbackTest.php
index ab293bd5ba67268fb9eab827fdbe73161add6d8a..17f4ca396f759646ac13f7613996a391c2df3356 100644
--- a/core/modules/language/tests/src/Kernel/LanguageFallbackTest.php
+++ b/core/modules/language/tests/src/Kernel/LanguageFallbackTest.php
@@ -19,7 +19,7 @@ protected function setUp() {
     parent::setUp();
 
     $i = 0;
-    foreach (array('af', 'am', 'ar') as $langcode) {
+    foreach (['af', 'am', 'ar'] as $langcode) {
       $language = ConfigurableLanguage::createFromLangcode($langcode);
       $language->set('weight', $i--);
       $language->save();
@@ -31,7 +31,7 @@ protected function setUp() {
    */
   public function testCandidates() {
     $language_list = $this->languageManager->getLanguages();
-    $expected = array_keys($language_list + array(LanguageInterface::LANGCODE_NOT_SPECIFIED => NULL));
+    $expected = array_keys($language_list + [LanguageInterface::LANGCODE_NOT_SPECIFIED => NULL]);
 
     // Check that language fallback candidates by default are all the available
     // languages sorted by weight.
@@ -49,11 +49,11 @@ public function testCandidates() {
     $this->state->set('language_test.fallback_operation_alter.candidates', TRUE);
     $expected[] = LanguageInterface::LANGCODE_NOT_SPECIFIED;
     $expected[] = LanguageInterface::LANGCODE_NOT_APPLICABLE;
-    $candidates = $this->languageManager->getFallbackCandidates(array('operation' => 'test'));
+    $candidates = $this->languageManager->getFallbackCandidates(['operation' => 'test']);
     $this->assertEqual(array_values($candidates), $expected, 'Language fallback candidates are alterable for specific operations.');
 
     // Check that when the site is monolingual no language fallback is applied.
-    $langcodes_to_delete = array();
+    $langcodes_to_delete = [];
     foreach ($language_list as $langcode => $language) {
       if (!$language->isDefault()) {
         $langcodes_to_delete[] = $langcode;
@@ -61,7 +61,7 @@ public function testCandidates() {
     }
     entity_delete_multiple('configurable_language', $langcodes_to_delete);
     $candidates = $this->languageManager->getFallbackCandidates();
-    $this->assertEqual(array_values($candidates), array(LanguageInterface::LANGCODE_DEFAULT), 'Language fallback is not applied when the Language module is not enabled.');
+    $this->assertEqual(array_values($candidates), [LanguageInterface::LANGCODE_DEFAULT], 'Language fallback is not applied when the Language module is not enabled.');
   }
 
 }
diff --git a/core/modules/language/tests/src/Kernel/LanguageTestBase.php b/core/modules/language/tests/src/Kernel/LanguageTestBase.php
index eb4f0ef0055e195763dd04488bbe2622b37a15cb..f4dcbd2f9df311d98f9a40b3631f06dff4f315ae 100644
--- a/core/modules/language/tests/src/Kernel/LanguageTestBase.php
+++ b/core/modules/language/tests/src/Kernel/LanguageTestBase.php
@@ -9,7 +9,7 @@
  */
 abstract class LanguageTestBase extends KernelTestBase {
 
-  public static $modules = array('system', 'language', 'language_test');
+  public static $modules = ['system', 'language', 'language_test'];
   /**
    * The language manager.
    *
@@ -30,7 +30,7 @@ abstract class LanguageTestBase extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->installConfig(array('language'));
+    $this->installConfig(['language']);
 
     $this->state = $this->container->get('state');
 
diff --git a/core/modules/language/tests/src/Kernel/Migrate/MigrateDefaultLanguageTrait.php b/core/modules/language/tests/src/Kernel/Migrate/MigrateDefaultLanguageTrait.php
index 94bb02d33965d9dab4911fe4da2bbb1d9cee557d..dd2e67ecfe57453f46a4b5ccc671846e65c51727 100644
--- a/core/modules/language/tests/src/Kernel/Migrate/MigrateDefaultLanguageTrait.php
+++ b/core/modules/language/tests/src/Kernel/Migrate/MigrateDefaultLanguageTrait.php
@@ -24,9 +24,9 @@ protected function doTestMigration($langcode, $existing = TRUE) {
     // default language is migrated.
     $value = 'O:8:"stdClass":11:{s:8:"language";s:2:"' . $langcode . '";s:4:"name";s:6:"French";s:6:"native";s:6:"French";s:9:"direction";s:1:"0";s:7:"enabled";i:1;s:7:"plurals";s:1:"0";s:7:"formula";s:0:"";s:6:"domain";s:0:"";s:6:"prefix";s:0:"";s:6:"weight";s:1:"0";s:10:"javascript";s:0:"";}';
     $this->sourceDatabase->update('variable')
-      ->fields(array(
+      ->fields([
         'value' => $value
-      ))
+      ])
       ->condition('name', 'language_default' )
       ->execute();
 
diff --git a/core/modules/language/tests/src/Kernel/Migrate/d6/MigrateLanguageNegotiationSettingsTest.php b/core/modules/language/tests/src/Kernel/Migrate/d6/MigrateLanguageNegotiationSettingsTest.php
index 0e74f494aa4d33447517d758a8bb107bc67df6a9..4a884274026fb7742e2c5f0c624e07f4047c213c 100644
--- a/core/modules/language/tests/src/Kernel/Migrate/d6/MigrateLanguageNegotiationSettingsTest.php
+++ b/core/modules/language/tests/src/Kernel/Migrate/d6/MigrateLanguageNegotiationSettingsTest.php
@@ -56,7 +56,7 @@ public function testLanguageNegotiationWithDefaultPathPrefix() {
    */
   public function testLanguageNegotiationWithNoNegotiation() {
     $this->sourceDatabase->update('variable')
-      ->fields(array('value' => serialize(0)))
+      ->fields(['value' => serialize(0)])
       ->condition('name', 'language_negotiation')
       ->execute();
 
@@ -88,7 +88,7 @@ public function testLanguageNegotiationWithNoNegotiation() {
    */
   public function testLanguageNegotiationWithPathPrefix() {
     $this->sourceDatabase->update('variable')
-      ->fields(array('value' => serialize(2)))
+      ->fields(['value' => serialize(2)])
       ->condition('name', 'language_negotiation')
       ->execute();
 
@@ -129,7 +129,7 @@ public function testLanguageNegotiationWithPathPrefix() {
    */
   public function testLanguageNegotiationWithDomain() {
     $this->sourceDatabase->update('variable')
-      ->fields(array('value' => serialize(3)))
+      ->fields(['value' => serialize(3)])
       ->condition('name', 'language_negotiation')
       ->execute();
 
diff --git a/core/modules/language/tests/src/Kernel/Migrate/d7/MigrateLanguageNegotiationSettingsTest.php b/core/modules/language/tests/src/Kernel/Migrate/d7/MigrateLanguageNegotiationSettingsTest.php
index 269bac697a2e58d42eef416fe433fd8dd411bcfa..09681dee6520154132d5c850115ef0c62494ad33 100644
--- a/core/modules/language/tests/src/Kernel/Migrate/d7/MigrateLanguageNegotiationSettingsTest.php
+++ b/core/modules/language/tests/src/Kernel/Migrate/d7/MigrateLanguageNegotiationSettingsTest.php
@@ -75,7 +75,7 @@ public function testLanguageNegotiationWithPrefix() {
    */
   public function testLanguageNegotiationWithDomain() {
     $this->sourceDatabase->update('variable')
-      ->fields(array('value' => serialize(1)))
+      ->fields(['value' => serialize(1)])
       ->condition('name', 'locale_language_negotiation_url_part')
       ->execute();
 
diff --git a/core/modules/language/tests/src/Kernel/Views/ArgumentLanguageTest.php b/core/modules/language/tests/src/Kernel/Views/ArgumentLanguageTest.php
index 3a4e9cf7572ff0a5c99fa40f4fd6570738c365b2..27c7410b9b629875dc9edcd7f2d5123d614a1f85 100644
--- a/core/modules/language/tests/src/Kernel/Views/ArgumentLanguageTest.php
+++ b/core/modules/language/tests/src/Kernel/Views/ArgumentLanguageTest.php
@@ -17,28 +17,28 @@ class ArgumentLanguageTest extends LanguageTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests the language argument.
    */
   public function testArgument() {
     $view = Views::getView('test_view');
-    foreach (array('en' => 'John', 'xx-lolspeak' => 'George') as $langcode => $name) {
+    foreach (['en' => 'John', 'xx-lolspeak' => 'George'] as $langcode => $name) {
       $view->setDisplay();
-      $view->displayHandlers->get('default')->overrideOption('arguments', array(
-        'langcode' => array(
+      $view->displayHandlers->get('default')->overrideOption('arguments', [
+        'langcode' => [
           'id' => 'langcode',
           'table' => 'views_test_data',
           'field' => 'langcode',
-        ),
-      ));
-      $this->executeView($view, array($langcode));
+        ],
+      ]);
+      $this->executeView($view, [$langcode]);
 
-      $expected = array(array(
+      $expected = [[
         'name' => $name,
-      ));
-      $this->assertIdenticalResultset($view, $expected, array('views_test_data_name' => 'name'));
+      ]];
+      $this->assertIdenticalResultset($view, $expected, ['views_test_data_name' => 'name']);
       $view->destroy();
     }
   }
diff --git a/core/modules/language/tests/src/Kernel/Views/FieldLanguageTest.php b/core/modules/language/tests/src/Kernel/Views/FieldLanguageTest.php
index 3dbbfe424df5bbbc5b515129873776a58a6dd617..5dc7124046090ca33f09e65fdb1d7beb6ff5fea9 100644
--- a/core/modules/language/tests/src/Kernel/Views/FieldLanguageTest.php
+++ b/core/modules/language/tests/src/Kernel/Views/FieldLanguageTest.php
@@ -17,7 +17,7 @@ class FieldLanguageTest extends LanguageTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests the language field.
@@ -25,13 +25,13 @@ class FieldLanguageTest extends LanguageTestBase {
   public function testField() {
     $view = Views::getView('test_view');
     $view->setDisplay();
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'langcode' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'langcode' => [
         'id' => 'langcode',
         'table' => 'views_test_data',
         'field' => 'langcode',
-      ),
-    ));
+      ],
+    ]);
     $this->executeView($view);
 
     $this->assertEqual($view->field['langcode']->advancedRender($view->result[0]), 'English');
diff --git a/core/modules/language/tests/src/Kernel/Views/FilterLanguageTest.php b/core/modules/language/tests/src/Kernel/Views/FilterLanguageTest.php
index 0c6241a4ea8baab63c4e059a04366e1d63a9f99f..c9dc98cbf38d841af349ccdb16e1d01b1d168270 100644
--- a/core/modules/language/tests/src/Kernel/Views/FilterLanguageTest.php
+++ b/core/modules/language/tests/src/Kernel/Views/FilterLanguageTest.php
@@ -17,29 +17,29 @@ class FilterLanguageTest extends LanguageTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests the language filter.
    */
   public function testFilter() {
     $view = Views::getView('test_view');
-    foreach (array('en' => 'John', 'xx-lolspeak' => 'George') as $langcode => $name) {
+    foreach (['en' => 'John', 'xx-lolspeak' => 'George'] as $langcode => $name) {
       $view->setDisplay();
-      $view->displayHandlers->get('default')->overrideOption('filters', array(
-        'langcode' => array(
+      $view->displayHandlers->get('default')->overrideOption('filters', [
+        'langcode' => [
           'id' => 'langcode',
           'table' => 'views_test_data',
           'field' => 'langcode',
-          'value' => array($langcode),
-        ),
-      ));
+          'value' => [$langcode],
+        ],
+      ]);
       $this->executeView($view);
 
-      $expected = array(array(
+      $expected = [[
         'name' => $name,
-      ));
-      $this->assertIdenticalResultset($view, $expected, array('views_test_data_name' => 'name'));
+      ]];
+      $this->assertIdenticalResultset($view, $expected, ['views_test_data_name' => 'name']);
 
       $expected = [
         '***LANGUAGE_site_default***',
diff --git a/core/modules/language/tests/src/Kernel/Views/LanguageTestBase.php b/core/modules/language/tests/src/Kernel/Views/LanguageTestBase.php
index cb5d4739db65c6f5d240c94f1e5d94ba4e27e2da..cab6fc84e0bd68557c05d40517d35062cde56f96 100644
--- a/core/modules/language/tests/src/Kernel/Views/LanguageTestBase.php
+++ b/core/modules/language/tests/src/Kernel/Views/LanguageTestBase.php
@@ -15,14 +15,14 @@ abstract class LanguageTestBase extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'language');
+  public static $modules = ['system', 'language'];
 
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
-    $this->installConfig(array('language'));
+    $this->installConfig(['language']);
 
     // Create another language beside English.
-    ConfigurableLanguage::create(array('id' => 'xx-lolspeak', 'label' => 'Lolspeak'))->save();
+    ConfigurableLanguage::create(['id' => 'xx-lolspeak', 'label' => 'Lolspeak'])->save();
   }
 
   /**
@@ -30,12 +30,12 @@ protected function setUp($import_test_views = TRUE) {
    */
   protected function schemaDefinition() {
     $schema = parent::schemaDefinition();
-    $schema['views_test_data']['fields']['langcode'] = array(
+    $schema['views_test_data']['fields']['langcode'] = [
       'description' => 'The {language}.langcode of this beatle.',
       'type' => 'varchar',
       'length' => 12,
       'default' => '',
-    );
+    ];
 
     return $schema;
   }
@@ -45,19 +45,19 @@ protected function schemaDefinition() {
    */
   protected function viewsData() {
     $data = parent::viewsData();
-    $data['views_test_data']['langcode'] = array(
+    $data['views_test_data']['langcode'] = [
       'title' => t('Langcode'),
       'help' => t('Langcode'),
-      'field' => array(
+      'field' => [
         'id' => 'language',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'language',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'language',
-      ),
-    );
+      ],
+    ];
 
     return $data;
   }
diff --git a/core/modules/language/tests/src/Unit/ConfigurableLanguageUnitTest.php b/core/modules/language/tests/src/Unit/ConfigurableLanguageUnitTest.php
index d5de7a63f5f5b55ee7acd0f96281ea85ca27aa4f..58670f0255a2b12d923244a1f2de6276e2d04262 100644
--- a/core/modules/language/tests/src/Unit/ConfigurableLanguageUnitTest.php
+++ b/core/modules/language/tests/src/Unit/ConfigurableLanguageUnitTest.php
@@ -21,11 +21,11 @@ public function testDirection() {
     // Direction of language writing, an integer. Usually either
     // ConfigurableLanguage::DIRECTION_LTR or
     // ConfigurableLanguage::DIRECTION_RTL.
-    $configurableLanguage = new ConfigurableLanguage(array('direction' => ConfigurableLanguage::DIRECTION_LTR), 'configurable_language');
+    $configurableLanguage = new ConfigurableLanguage(['direction' => ConfigurableLanguage::DIRECTION_LTR], 'configurable_language');
     $this->assertEquals(ConfigurableLanguage::DIRECTION_LTR, $configurableLanguage->getDirection());
 
     // Test direction again, setting direction to RTL.
-    $configurableLanguage = new ConfigurableLanguage(array('direction' => ConfigurableLanguage::DIRECTION_RTL), 'configurable_language');
+    $configurableLanguage = new ConfigurableLanguage(['direction' => ConfigurableLanguage::DIRECTION_RTL], 'configurable_language');
     $this->assertEquals(ConfigurableLanguage::DIRECTION_RTL, $configurableLanguage->getDirection());
   }
 
@@ -36,7 +36,7 @@ public function testDirection() {
   public function testWeight() {
     // The weight, an integer. Used to order languages with larger positive
     // weights sinking items toward the bottom of lists.
-    $configurableLanguage = new ConfigurableLanguage(array('weight' => -5), 'configurable_language');
+    $configurableLanguage = new ConfigurableLanguage(['weight' => -5], 'configurable_language');
     $this->assertEquals($configurableLanguage->getWeight(), -5);
     $this->assertEquals($configurableLanguage->setWeight(13)->getWeight(), 13);
   }
diff --git a/core/modules/language/tests/src/Unit/ContentLanguageSettingsUnitTest.php b/core/modules/language/tests/src/Unit/ContentLanguageSettingsUnitTest.php
index b1a1487194ed9bc62d2cdf5f6ba53440cec3cf9e..06820d063180e158b33f3a24d7309f78c847b3ed 100644
--- a/core/modules/language/tests/src/Unit/ContentLanguageSettingsUnitTest.php
+++ b/core/modules/language/tests/src/Unit/ContentLanguageSettingsUnitTest.php
@@ -86,17 +86,17 @@ public function testCalculateDependencies() {
     $target_entity_type = $this->getMock('\Drupal\Core\Entity\EntityTypeInterface');
     $target_entity_type->expects($this->any())
       ->method('getBundleConfigDependency')
-      ->will($this->returnValue(array('type' => 'config', 'name' => 'test.test_entity_type.id')));
+      ->will($this->returnValue(['type' => 'config', 'name' => 'test.test_entity_type.id']));
 
     $this->entityManager->expects($this->any())
       ->method('getDefinition')
       ->with('test_entity_type')
       ->will($this->returnValue($target_entity_type));
 
-    $config = new ContentLanguageSettings(array(
+    $config = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $dependencies = $config->calculateDependencies()->getDependencies();
     $this->assertContains('test.test_entity_type.id', $dependencies['config']);
   }
@@ -105,10 +105,10 @@ public function testCalculateDependencies() {
    * @covers ::id
    */
   public function testId() {
-    $config = new ContentLanguageSettings(array(
+    $config = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $this->assertSame('test_entity_type.test_bundle', $config->id());
   }
 
@@ -116,10 +116,10 @@ public function testId() {
    * @covers ::getTargetEntityTypeId
    */
   public function testTargetEntityTypeId() {
-    $config = new ContentLanguageSettings(array(
+    $config = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $this->assertSame('test_entity_type', $config->getTargetEntityTypeId());
   }
 
@@ -127,10 +127,10 @@ public function testTargetEntityTypeId() {
    * @covers ::getTargetBundle
    */
   public function testTargetBundle() {
-    $config = new ContentLanguageSettings(array(
+    $config = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $this->assertSame('test_bundle', $config->getTargetBundle());
   }
 
@@ -146,16 +146,16 @@ public function testDefaultLangcode(ContentLanguageSettings $config, $expected)
 
   public function providerDefaultLangcode() {
     $langcode = $this->randomMachineName();
-    $config = new ContentLanguageSettings(array(
+    $config = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $config->setDefaultLangcode($langcode);
 
-    $defaultConfig = new ContentLanguageSettings(array(
+    $defaultConfig = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_default_language_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
 
     return [
       [$config, $langcode],
@@ -174,22 +174,22 @@ public function testLanguageAlterable(ContentLanguageSettings $config, $expected
   }
 
   public function providerLanguageAlterable() {
-    $alterableConfig = new ContentLanguageSettings(array(
+    $alterableConfig = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $alterableConfig->setLanguageAlterable(TRUE);
 
-    $nonAlterableConfig = new ContentLanguageSettings(array(
+    $nonAlterableConfig = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_fixed_language_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $nonAlterableConfig->setLanguageAlterable(FALSE);
 
-    $defaultConfig = new ContentLanguageSettings(array(
+    $defaultConfig = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_default_language_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
 
     return [
       [$alterableConfig, TRUE],
@@ -208,22 +208,22 @@ public function testIsDefaultConfiguration(ContentLanguageSettings $config, $exp
   }
 
   public function providerIsDefaultConfiguration() {
-    $alteredLanguage = new ContentLanguageSettings(array(
+    $alteredLanguage = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $alteredLanguage->setLanguageAlterable(TRUE);
 
-    $alteredDefaultLangcode = new ContentLanguageSettings(array(
+    $alteredDefaultLangcode = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_fixed_language_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $alteredDefaultLangcode->setDefaultLangcode($this->randomMachineName());
 
-    $defaultConfig = new ContentLanguageSettings(array(
+    $defaultConfig = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_default_language_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
 
     return [
       [$alteredLanguage, FALSE],
@@ -240,10 +240,10 @@ public function providerIsDefaultConfiguration() {
   public function testLoadByEntityTypeBundle($config_id, ContentLanguageSettings $existing_config = NULL, $expected_langcode, $expected_language_alterable) {
     list($type, $bundle) = explode('.', $config_id);
 
-    $nullConfig = new ContentLanguageSettings(array(
+    $nullConfig = new ContentLanguageSettings([
       'target_entity_type_id' => $type,
       'target_bundle' => $bundle,
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $this->configEntityStorageInterface
       ->expects($this->any())
       ->method('load')
@@ -271,23 +271,23 @@ public function testLoadByEntityTypeBundle($config_id, ContentLanguageSettings $
   }
 
   public function providerLoadByEntityTypeBundle() {
-    $alteredLanguage = new ContentLanguageSettings(array(
+    $alteredLanguage = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $alteredLanguage->setLanguageAlterable(TRUE);
 
     $langcode = $this->randomMachineName();
-    $alteredDefaultLangcode = new ContentLanguageSettings(array(
+    $alteredDefaultLangcode = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_fixed_language_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
     $alteredDefaultLangcode->setDefaultLangcode($langcode);
 
-    $defaultConfig = new ContentLanguageSettings(array(
+    $defaultConfig = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_default_language_bundle',
-    ), 'language_content_settings');
+    ], 'language_content_settings');
 
     return [
       ['test_entity_type.test_bundle', $alteredLanguage, LanguageInterface::LANGCODE_SITE_DEFAULT, TRUE],
diff --git a/core/modules/language/tests/src/Unit/LanguageNegotiationUrlTest.php b/core/modules/language/tests/src/Unit/LanguageNegotiationUrlTest.php
index 735abd67b6832fbea8a98693b6d53bd3f6c46e76..825ca7d863dcc94cbe5263736d51aa30f5ed7bb9 100644
--- a/core/modules/language/tests/src/Unit/LanguageNegotiationUrlTest.php
+++ b/core/modules/language/tests/src/Unit/LanguageNegotiationUrlTest.php
@@ -33,10 +33,10 @@ protected function setUp() {
     $language_en->expects($this->any())
       ->method('getId')
       ->will($this->returnValue('en'));
-    $languages = array(
+    $languages = [
       'de' => $language_de,
       'en' => $language_en,
-    );
+    ];
     $this->languages = $languages;
 
     // Create a language manager stub.
@@ -126,7 +126,7 @@ public function providerTestPathPrefix() {
     // No configuration.
     $path_prefix_configuration[] = [
       'prefix' => 'de',
-      'prefixes' => array(),
+      'prefixes' => [],
       'expected_langcode' => FALSE,
     ];
     // Non-matching prefix.
@@ -168,7 +168,7 @@ public function testDomain($http_host, $domains, $expected_langcode) {
       ],
     ]);
 
-    $request = Request::create('', 'GET', array(), array(), array(), array('HTTP_HOST' => $http_host));
+    $request = Request::create('', 'GET', [], [], [], ['HTTP_HOST' => $http_host]);
     $method = new LanguageNegotiationUrl();
     $method->setLanguageManager($this->languageManager);
     $method->setConfig($config);
@@ -193,60 +193,60 @@ public function testDomain($http_host, $domains, $expected_langcode) {
    */
   public function providerTestDomain() {
 
-    $domain_configuration[] = array(
+    $domain_configuration[] = [
       'http_host' => 'example.de',
-      'domains' => array(
+      'domains' => [
         'de' => 'http://example.de',
-      ),
+      ],
       'expected_langcode' => 'de',
-    );
+    ];
     // No configuration.
-    $domain_configuration[] = array(
+    $domain_configuration[] = [
       'http_host' => 'example.de',
-      'domains' => array(),
+      'domains' => [],
       'expected_langcode' => FALSE,
-    );
+    ];
     // HTTP host with a port.
-    $domain_configuration[] = array(
+    $domain_configuration[] = [
       'http_host' => 'example.de:8080',
-      'domains' => array(
+      'domains' => [
         'de' => 'http://example.de',
-      ),
+      ],
       'expected_langcode' => 'de',
-    );
+    ];
     // Domain configuration with https://.
-    $domain_configuration[] = array(
+    $domain_configuration[] = [
       'http_host' => 'example.de',
-      'domains' => array(
+      'domains' => [
         'de' => 'https://example.de',
-      ),
+      ],
       'expected_langcode' => 'de',
-    );
+    ];
     // Non-matching HTTP host.
-    $domain_configuration[] = array(
+    $domain_configuration[] = [
       'http_host' => 'example.com',
-      'domains' => array(
+      'domains' => [
         'de' => 'http://example.com',
-      ),
+      ],
       'expected_langcode' => 'de',
-    );
+    ];
     // Testing a non-existing language.
-    $domain_configuration[] = array(
+    $domain_configuration[] = [
       'http_host' => 'example.com',
-      'domains' => array(
+      'domains' => [
         'it' => 'http://example.it',
-      ),
+      ],
       'expected_langcode' => FALSE,
-    );
+    ];
     // Multiple domain configurations.
-    $domain_configuration[] = array(
+    $domain_configuration[] = [
       'http_host' => 'example.com',
-      'domains' => array(
+      'domains' => [
         'de' => 'http://example.de',
         'en' => 'http://example.com',
-      ),
+      ],
       'expected_langcode' => 'en',
-    );
+    ];
     return $domain_configuration;
   }
 
diff --git a/core/modules/language/tests/src/Unit/Menu/LanguageLocalTasksTest.php b/core/modules/language/tests/src/Unit/Menu/LanguageLocalTasksTest.php
index 1f711ae78e19eb571402736344c4325a56a317d1..a231e198b589bdf6d8425ab7a8c80d6797ec22ca 100644
--- a/core/modules/language/tests/src/Unit/Menu/LanguageLocalTasksTest.php
+++ b/core/modules/language/tests/src/Unit/Menu/LanguageLocalTasksTest.php
@@ -12,9 +12,9 @@
 class LanguageLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array(
+    $this->directoryList = [
       'language' => 'core/modules/language',
-    );
+    ];
     parent::setUp();
   }
 
@@ -31,19 +31,19 @@ public function testLanguageAdminLocalTasks($route, $expected) {
    * Provides a list of routes to test.
    */
   public function getLanguageAdminOverviewRoutes() {
-    return array(
-      array('entity.configurable_language.collection', array(array('entity.configurable_language.collection', 'language.negotiation'))),
-      array('language.negotiation', array(array('entity.configurable_language.collection', 'language.negotiation'))),
-    );
+    return [
+      ['entity.configurable_language.collection', [['entity.configurable_language.collection', 'language.negotiation']]],
+      ['language.negotiation', [['entity.configurable_language.collection', 'language.negotiation']]],
+    ];
   }
 
   /**
    * Tests language edit local tasks existence.
    */
   public function testLanguageEditLocalTasks() {
-    $this->assertLocalTasks('entity.configurable_language.edit_form', array(
-      0 => array('entity.configurable_language.edit_form'),
-    ));
+    $this->assertLocalTasks('entity.configurable_language.edit_form', [
+      0 => ['entity.configurable_language.edit_form'],
+    ]);
   }
 
 }
diff --git a/core/modules/link/link.module b/core/modules/link/link.module
index 46aeeba21f39204ed8e994044e0f695c1c1eccb4..5a3527fc41b12c4481b701f1dfcdfd4cc32e29db 100644
--- a/core/modules/link/link.module
+++ b/core/modules/link/link.module
@@ -15,11 +15,11 @@ function link_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.link':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Link module allows you to create fields that contain internal or external URLs and optional link text. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":link_documentation">online documentation for the Link module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':link_documentation' => 'https://www.drupal.org/documentation/modules/link')) . '</p>';
+      $output .= '<p>' . t('The Link module allows you to create fields that contain internal or external URLs and optional link text. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":link_documentation">online documentation for the Link module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':link_documentation' => 'https://www.drupal.org/documentation/modules/link']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing and displaying link fields') . '</dt>';
-      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the link field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the link field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Setting the allowed link type') . '</dt>';
       $output .= '<dd>' . t('In the field settings you can define the allowed link type to be <em>internal links only</em>, <em>external links only</em>, or <em>both internal and external links</em>. <em>Internal links only</em> and <em>both internal and external links</em> options enable an autocomplete widget for internal links, so a user does not have to copy or remember a URL.') . '</dd>';
       $output .= '<dt>' . t('Adding link text') . '</dt>';
@@ -39,11 +39,11 @@ function link_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function link_theme() {
-  return array(
-    'link_formatter_link_separate' => array(
-      'variables' => array('title' => NULL, 'url_title' => NULL, 'url' => NULL),
-    ),
-  );
+  return [
+    'link_formatter_link_separate' => [
+      'variables' => ['title' => NULL, 'url_title' => NULL, 'url' => NULL],
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php b/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
index 7d2d0eeabd3c51b7054e7eab76d3793e2c2d56e1..30fcd8e260d5c0e31fc0315d892041f51d035bcb 100644
--- a/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
+++ b/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
@@ -78,13 +78,13 @@ public function __construct($plugin_id, $plugin_definition, FieldDefinitionInter
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'trim_length' => '80',
       'url_only' => '',
       'url_plain' => '',
       'rel' => '',
       'target' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -93,43 +93,43 @@ public static function defaultSettings() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $elements = parent::settingsForm($form, $form_state);
 
-    $elements['trim_length'] = array(
+    $elements['trim_length'] = [
       '#type' => 'number',
       '#title' => t('Trim link text length'),
       '#field_suffix' => t('characters'),
       '#default_value' => $this->getSetting('trim_length'),
       '#min' => 1,
       '#description' => t('Leave blank to allow unlimited link text lengths.'),
-    );
-    $elements['url_only'] = array(
+    ];
+    $elements['url_only'] = [
       '#type' => 'checkbox',
       '#title' => t('URL only'),
       '#default_value' => $this->getSetting('url_only'),
       '#access' => $this->getPluginId() == 'link',
-    );
-    $elements['url_plain'] = array(
+    ];
+    $elements['url_plain'] = [
       '#type' => 'checkbox',
       '#title' => t('Show URL as plain text'),
       '#default_value' => $this->getSetting('url_plain'),
       '#access' => $this->getPluginId() == 'link',
-      '#states' => array(
-        'visible' => array(
-          ':input[name*="url_only"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-    $elements['rel'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name*="url_only"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+    $elements['rel'] = [
       '#type' => 'checkbox',
       '#title' => t('Add rel="nofollow" to links'),
       '#return_value' => 'nofollow',
       '#default_value' => $this->getSetting('rel'),
-    );
-    $elements['target'] = array(
+    ];
+    $elements['target'] = [
       '#type' => 'checkbox',
       '#title' => t('Open link in new window'),
       '#return_value' => '_blank',
       '#default_value' => $this->getSetting('target'),
-    );
+    ];
 
     return $elements;
   }
@@ -138,12 +138,12 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $settings = $this->getSettings();
 
     if (!empty($settings['trim_length'])) {
-      $summary[] = t('Link text trimmed to @limit characters', array('@limit' => $settings['trim_length']));
+      $summary[] = t('Link text trimmed to @limit characters', ['@limit' => $settings['trim_length']]);
     }
     else {
       $summary[] = t('Link text not trimmed');
@@ -157,7 +157,7 @@ public function settingsSummary() {
       }
     }
     if (!empty($settings['rel'])) {
-      $summary[] = t('Add rel="@rel"', array('@rel' => $settings['rel']));
+      $summary[] = t('Add rel="@rel"', ['@rel' => $settings['rel']]);
     }
     if (!empty($settings['target'])) {
       $summary[] = t('Open link in new window');
@@ -170,7 +170,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $element = array();
+    $element = [];
     $entity = $items->getEntity();
     $settings = $this->getSettings();
 
@@ -193,9 +193,9 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
       }
 
       if (!empty($settings['url_only']) && !empty($settings['url_plain'])) {
-        $element[$delta] = array(
+        $element[$delta] = [
           '#plain_text' => $link_title,
-        );
+        ];
 
         if (!empty($item->_attributes)) {
           // Piggyback on the metadata attributes, which will be placed in the
@@ -204,19 +204,19 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
           // @todo Does RDF need a URL rather than an internal URI here?
           // @see \Drupal\Tests\rdf\Kernel\Field\LinkFieldRdfaTest.
           $content = str_replace('internal:/', '', $item->uri);
-          $item->_attributes += array('content' => $content);
+          $item->_attributes += ['content' => $content];
         }
       }
       else {
-        $element[$delta] = array(
+        $element[$delta] = [
           '#type' => 'link',
           '#title' => $link_title,
           '#options' => $url->getOptions(),
-        );
+        ];
         $element[$delta]['#url'] = $url;
 
         if (!empty($item->_attributes)) {
-          $element[$delta]['#options'] += array ('attributes' => array());
+          $element[$delta]['#options'] +=  ['attributes' => []];
           $element[$delta]['#options']['attributes'] += $item->_attributes;
           // Unset field item attributes since they have been included in the
           // formatter output and should not be rendered in the field template.
diff --git a/core/modules/link/src/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php b/core/modules/link/src/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php
index f7370378e389d64535ccc18b7b66f21448585239..2598b55b6fb875d1138dee58f360744538a05ddd 100644
--- a/core/modules/link/src/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php
+++ b/core/modules/link/src/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php
@@ -26,18 +26,18 @@ class LinkSeparateFormatter extends LinkFormatter {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'trim_length' => 80,
       'rel' => '',
       'target' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $element = array();
+    $element = [];
     $entity = $items->getEntity();
     $settings = $this->getSettings();
 
@@ -67,12 +67,12 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
         $url_title = Unicode::truncate($url_title, $settings['trim_length'], FALSE, TRUE);
       }
 
-      $element[$delta] = array(
+      $element[$delta] = [
         '#theme' => 'link_formatter_link_separate',
         '#title' => $link_title,
         '#url_title' => $url_title,
         '#url' => $url,
-      );
+      ];
 
       if (!empty($item->_attributes)) {
         // Set our RDFa attributes on the <a> element that is being built.
diff --git a/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php b/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
index 6e98ae22545268b0e79a885ba22adf642a8a4210..e354f00871c40230743af57cba4e572e656f789c 100644
--- a/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+++ b/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
@@ -30,10 +30,10 @@ class LinkItem extends FieldItemBase implements LinkItemInterface {
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'title' => DRUPAL_OPTIONAL,
       'link_type' => LinkItemInterface::LINK_GENERIC
-    ) + parent::defaultFieldSettings();
+    ] + parent::defaultFieldSettings();
   }
 
   /**
@@ -56,58 +56,58 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'uri' => array(
+    return [
+      'columns' => [
+        'uri' => [
           'description' => 'The URI of the link.',
           'type' => 'varchar',
           'length' => 2048,
-        ),
-        'title' => array(
+        ],
+        'title' => [
           'description' => 'The link text.',
           'type' => 'varchar',
           'length' => 255,
-        ),
-        'options' => array(
+        ],
+        'options' => [
           'description' => 'Serialized array of options for the link.',
           'type' => 'blob',
           'size' => 'big',
           'serialize' => TRUE,
-        ),
-      ),
-      'indexes' => array(
-        'uri' => array(array('uri', 30)),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'uri' => [['uri', 30]],
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
-    $element = array();
+    $element = [];
 
-    $element['link_type'] = array(
+    $element['link_type'] = [
       '#type' => 'radios',
       '#title' => t('Allowed link type'),
       '#default_value' => $this->getSetting('link_type'),
-      '#options' => array(
+      '#options' => [
         static::LINK_INTERNAL => t('Internal links only'),
         static::LINK_EXTERNAL => t('External links only'),
         static::LINK_GENERIC => t('Both internal and external links'),
-      ),
-    );
+      ],
+    ];
 
-    $element['title'] = array(
+    $element['title'] = [
       '#type' => 'radios',
       '#title' => t('Allow link text'),
       '#default_value' => $this->getSetting('title'),
-      '#options' => array(
+      '#options' => [
         DRUPAL_DISABLED => t('Disabled'),
         DRUPAL_OPTIONAL => t('Optional'),
         DRUPAL_REQUIRED => t('Required'),
-      ),
-    );
+      ],
+    ];
 
     return $element;
   }
@@ -119,7 +119,7 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
     $random = new Random();
     if ($field_definition->getItemDefinition()->getSetting('link_type') & LinkItemInterface::LINK_EXTERNAL) {
       // Set of possible top-level domains.
-      $tlds = array('com', 'net', 'gov', 'org', 'edu', 'biz', 'info');
+      $tlds = ['com', 'net', 'gov', 'org', 'edu', 'biz', 'info'];
       // Set random length for the domain name.
       $domain_length = mt_rand(7, 15);
 
diff --git a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
index 9af176cb03f6b96cef456d41459f9b29754196cb..e1b1c2a8f5716df4f0dc728b89f5aff632169b89 100644
--- a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
+++ b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
@@ -27,10 +27,10 @@ class LinkWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'placeholder_url' => '',
       'placeholder_title' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -74,7 +74,7 @@ protected static function getUriAsDisplayableString($uri) {
       // Show the 'entity:' URI as the entity autocomplete would.
       $entity_manager = \Drupal::entityManager();
       if ($entity_manager->getDefinition($entity_type, FALSE) && $entity = \Drupal::entityManager()->getStorage($entity_type)->load($entity_id)) {
-        $displayable_string = EntityAutocomplete::getEntityLabels(array($entity));
+        $displayable_string = EntityAutocomplete::getEntityLabels([$entity]);
       }
     }
 
@@ -153,7 +153,7 @@ public static function validateTitleElement(&$element, FormStateInterface $form_
       $element['title']['#required'] = TRUE;
       // We expect the field name placeholder value to be wrapped in t() here,
       // so it won't be escaped again as it's already marked safe.
-      $form_state->setError($element['title'], t('@name field is required.', array('@name' => $element['title']['#title'])));
+      $form_state->setError($element['title'], t('@name field is required.', ['@name' => $element['title']['#title']]));
     }
   }
 
@@ -164,7 +164,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     /** @var \Drupal\link\LinkItemInterface $item */
     $item = $items[$delta];
 
-    $element['uri'] = array(
+    $element['uri'] = [
       '#type' => 'url',
       '#title' => $this->t('URL'),
       '#placeholder' => $this->getSetting('placeholder_url'),
@@ -172,10 +172,10 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       // However, if it is inaccessible to the current user, do not display it
       // to them.
       '#default_value' => (!$item->isEmpty() && (\Drupal::currentUser()->hasPermission('link to any page') || $item->getUrl()->access())) ? static::getUriAsDisplayableString($item->uri) : NULL,
-      '#element_validate' => array(array(get_called_class(), 'validateUriElement')),
+      '#element_validate' => [[get_called_class(), 'validateUriElement']],
       '#maxlength' => 2048,
       '#required' => $element['#required'],
-    );
+    ];
 
     // If the field is configured to support internal links, it cannot use the
     // 'url' form element and we have to do the validation ourselves.
@@ -195,43 +195,43 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     // If the field is configured to allow only internal links, add a useful
     // element prefix and description.
     if (!$this->supportsExternalLinks()) {
-      $element['uri']['#field_prefix'] = rtrim(\Drupal::url('<front>', array(), array('absolute' => TRUE)), '/');
-      $element['uri']['#description'] = $this->t('This must be an internal path such as %add-node. You can also start typing the title of a piece of content to select it. Enter %front to link to the front page.', array('%add-node' => '/node/add', '%front' => '<front>'));
+      $element['uri']['#field_prefix'] = rtrim(\Drupal::url('<front>', [], ['absolute' => TRUE]), '/');
+      $element['uri']['#description'] = $this->t('This must be an internal path such as %add-node. You can also start typing the title of a piece of content to select it. Enter %front to link to the front page.', ['%add-node' => '/node/add', '%front' => '<front>']);
     }
     // If the field is configured to allow both internal and external links,
     // show a useful description.
     elseif ($this->supportsExternalLinks() && $this->supportsInternalLinks()) {
-      $element['uri']['#description'] = $this->t('Start typing the title of a piece of content to select it. You can also enter an internal path such as %add-node or an external URL such as %url. Enter %front to link to the front page.', array('%front' => '<front>', '%add-node' => '/node/add', '%url' => 'http://example.com'));
+      $element['uri']['#description'] = $this->t('Start typing the title of a piece of content to select it. You can also enter an internal path such as %add-node or an external URL such as %url. Enter %front to link to the front page.', ['%front' => '<front>', '%add-node' => '/node/add', '%url' => 'http://example.com']);
     }
     // If the field is configured to allow only external links, show a useful
     // description.
     elseif ($this->supportsExternalLinks() && !$this->supportsInternalLinks()) {
-      $element['uri']['#description'] = $this->t('This must be an external URL such as %url.', array('%url' => 'http://example.com'));
+      $element['uri']['#description'] = $this->t('This must be an external URL such as %url.', ['%url' => 'http://example.com']);
     }
 
-    $element['title'] = array(
+    $element['title'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Link text'),
       '#placeholder' => $this->getSetting('placeholder_title'),
       '#default_value' => isset($items[$delta]->title) ? $items[$delta]->title : NULL,
       '#maxlength' => 255,
       '#access' => $this->getFieldSetting('title') != DRUPAL_DISABLED,
-    );
+    ];
     // Post-process the title field to make it conditionally required if URL is
     // non-empty. Omit the validation on the field edit form, since the field
     // settings cannot be saved otherwise.
     if (!$this->isDefaultValueWidget($form_state) && $this->getFieldSetting('title') == DRUPAL_REQUIRED) {
-      $element['#element_validate'][] = array(get_called_class(), 'validateTitleElement');
+      $element['#element_validate'][] = [get_called_class(), 'validateTitleElement'];
     }
 
     // Exposing the attributes array in the widget is left for alternate and more
     // advanced field widgets.
-    $element['attributes'] = array(
+    $element['attributes'] = [
       '#type' => 'value',
       '#tree' => TRUE,
-      '#value' => !empty($items[$delta]->options['attributes']) ? $items[$delta]->options['attributes'] : array(),
-      '#attributes' => array('class' => array('link-field-widget-attributes')),
-    );
+      '#value' => !empty($items[$delta]->options['attributes']) ? $items[$delta]->options['attributes'] : [],
+      '#attributes' => ['class' => ['link-field-widget-attributes']],
+    ];
 
     // If cardinality is 1, ensure a proper label is output for the field.
     if ($this->fieldDefinition->getFieldStorageDefinition()->getCardinality() == 1) {
@@ -242,9 +242,9 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       }
       // Otherwise wrap everything in a details element.
       else {
-        $element += array(
+        $element += [
           '#type' => 'fieldset',
-        );
+        ];
       }
     }
 
@@ -281,23 +281,23 @@ protected function supportsExternalLinks() {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $elements = parent::settingsForm($form, $form_state);
 
-    $elements['placeholder_url'] = array(
+    $elements['placeholder_url'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Placeholder for URL'),
       '#default_value' => $this->getSetting('placeholder_url'),
       '#description' => $this->t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
-    $elements['placeholder_title'] = array(
+    ];
+    $elements['placeholder_title'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Placeholder for link text'),
       '#default_value' => $this->getSetting('placeholder_title'),
       '#description' => $this->t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-      '#states' => array(
-        'invisible' => array(
-          ':input[name="instance[settings][title]"]' => array('value' => DRUPAL_DISABLED),
-        ),
-      ),
-    );
+      '#states' => [
+        'invisible' => [
+          ':input[name="instance[settings][title]"]' => ['value' => DRUPAL_DISABLED],
+        ],
+      ],
+    ];
 
     return $elements;
   }
@@ -306,7 +306,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $placeholder_title = $this->getSetting('placeholder_title');
     $placeholder_url = $this->getSetting('placeholder_url');
@@ -315,10 +315,10 @@ public function settingsSummary() {
     }
     else {
       if (!empty($placeholder_title)) {
-        $summary[] = $this->t('Title placeholder: @placeholder_title', array('@placeholder_title' => $placeholder_title));
+        $summary[] = $this->t('Title placeholder: @placeholder_title', ['@placeholder_title' => $placeholder_title]);
       }
       if (!empty($placeholder_url)) {
-        $summary[] = $this->t('URL placeholder: @placeholder_url', array('@placeholder_url' => $placeholder_url));
+        $summary[] = $this->t('URL placeholder: @placeholder_url', ['@placeholder_url' => $placeholder_url]);
       }
     }
 
diff --git a/core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php b/core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php
index 7d0e4fbee70b63911cf2c2f306e1838214cb8906..16ccae0fc7eb66f4603940ae234a090078620904 100644
--- a/core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php
+++ b/core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php
@@ -55,7 +55,7 @@ public function validate($value, Constraint $constraint) {
       // permission nor can access this URI.
       $allowed = $this->current_user->hasPermission('link to any page') || $url->access();
       if (!$allowed) {
-        $this->context->addViolation($constraint->message, array('@uri' => $value->uri));
+        $this->context->addViolation($constraint->message, ['@uri' => $value->uri]);
       }
     }
   }
diff --git a/core/modules/link/src/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidator.php b/core/modules/link/src/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidator.php
index 0bc178a7e08ee3e205af0197f23fb740a3ba75c4..94841739183ffc40fe1170a7e3feb46695dcff8e 100644
--- a/core/modules/link/src/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidator.php
+++ b/core/modules/link/src/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidator.php
@@ -26,7 +26,7 @@ public function validate($value, Constraint $constraint) {
       }
       // Disallow external URLs using untrusted protocols.
       if ($url->isExternal() && !in_array(parse_url($url->getUri(), PHP_URL_SCHEME), UrlHelper::getAllowedProtocols())) {
-        $this->context->addViolation($constraint->message, array('@uri' => $value->uri));
+        $this->context->addViolation($constraint->message, ['@uri' => $value->uri]);
       }
     }
   }
diff --git a/core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php b/core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php
index 46218133d5a4e90caded26ea66dd9088d4075193..6e2f0cff6554e24daac50a7f377126b26f859344 100644
--- a/core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php
+++ b/core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php
@@ -44,7 +44,7 @@ public function validate($value, Constraint $constraint) {
           $allowed = FALSE;
         }
         if (!$allowed) {
-          $this->context->addViolation($constraint->message, array('@uri' => $value->uri));
+          $this->context->addViolation($constraint->message, ['@uri' => $value->uri]);
         }
       }
     }
diff --git a/core/modules/link/src/Plugin/Validation/Constraint/LinkTypeConstraintValidator.php b/core/modules/link/src/Plugin/Validation/Constraint/LinkTypeConstraintValidator.php
index a67eb4dfc0bc242a66c99b85bd5df58e7024b60a..817e934b0ff09ef8ab01055047a66697523b8cca 100644
--- a/core/modules/link/src/Plugin/Validation/Constraint/LinkTypeConstraintValidator.php
+++ b/core/modules/link/src/Plugin/Validation/Constraint/LinkTypeConstraintValidator.php
@@ -43,7 +43,7 @@ public function validate($value, Constraint $constraint) {
       }
 
       if (!$uri_is_valid) {
-        $this->context->addViolation($constraint->message, array('@uri' => $link_item->uri));
+        $this->context->addViolation($constraint->message, ['@uri' => $link_item->uri]);
       }
     }
   }
diff --git a/core/modules/link/src/Tests/LinkFieldTest.php b/core/modules/link/src/Tests/LinkFieldTest.php
index e85ad53187948aaca40c40a832e01ccb596c158f..f25066ffb95ee059ef4f15254dd52999ed5f4123 100644
--- a/core/modules/link/src/Tests/LinkFieldTest.php
+++ b/core/modules/link/src/Tests/LinkFieldTest.php
@@ -55,33 +55,33 @@ protected function setUp() {
   function testURLValidation() {
     $field_name = Unicode::strtolower($this->randomMachineName());
     // Create a field with settings to validate.
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'link',
-    ));
+    ]);
     $this->fieldStorage->save();
     $this->field = FieldConfig::create([
       'field_storage' => $this->fieldStorage,
       'bundle' => 'entity_test',
-      'settings' => array(
+      'settings' => [
         'title' => DRUPAL_DISABLED,
         'link_type' => LinkItemInterface::LINK_GENERIC,
-      ),
+      ],
     ]);
     $this->field->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'link_default',
-        'settings' => array(
+        'settings' => [
           'placeholder_url' => 'http://example.com',
-        ),
-      ))
+        ],
+      ])
       ->save();
     entity_get_display('entity_test', 'entity_test', 'full')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'link',
-      ))
+      ])
       ->save();
 
     // Display creation form.
@@ -103,14 +103,14 @@ function testURLValidation() {
 
     // Define some valid URLs (keys are the entered values, values are the
     // strings displayed to the user).
-    $valid_external_entries = array(
+    $valid_external_entries = [
       'http://www.example.com/' => 'http://www.example.com/',
       // Strings within parenthesis without leading space char.
       'http://www.example.com/strings_(string_within_parenthesis)' => 'http://www.example.com/strings_(string_within_parenthesis)',
       // Numbers within parenthesis without leading space char.
       'http://www.example.com/numbers_(9999)' => 'http://www.example.com/numbers_(9999)',
-    );
-    $valid_internal_entries = array(
+    ];
+    $valid_internal_entries = [
       '/entity_test/add' => '/entity_test/add',
       '/a/path/alias' => '/a/path/alias',
 
@@ -137,24 +137,24 @@ function testURLValidation() {
       'entity:entity_test/' . $entity_test_no_label_access->id() => '- Restricted access - (' . $entity_test_no_label_access->id() . ')',
       // URI for an entity that doesn't exist, but with a valid ID.
       'entity:user/999999' => 'entity:user/999999',
-    );
+    ];
 
     // Define some invalid URLs.
     $validation_error_1 = "The path '@link_path' is invalid.";
     $validation_error_2 = 'Manually entered paths should start with /, ? or #.';
     $validation_error_3 = "The path '@link_path' is inaccessible.";
-    $invalid_external_entries = array(
+    $invalid_external_entries = [
       // Invalid protocol
       'invalid://not-a-valid-protocol' => $validation_error_1,
       // Missing host name
       'http://' => $validation_error_1,
-    );
-    $invalid_internal_entries = array(
+    ];
+    $invalid_internal_entries = [
       'no-leading-slash' => $validation_error_2,
       'entity:non_existing_entity_type/yar' => $validation_error_1,
       // URI for an entity that doesn't exist, with an invalid ID.
       'entity:user/invalid-parameter' => $validation_error_1,
-    );
+    ];
 
     // Test external and internal URLs for 'link_type' = LinkItemInterface::LINK_GENERIC.
     $this->assertValidEntries($field_name, $valid_external_entries + $valid_internal_entries);
@@ -191,13 +191,13 @@ function testURLValidation() {
    */
   protected function assertValidEntries($field_name, array $valid_entries) {
     foreach ($valid_entries as $uri => $string) {
-      $edit = array(
+      $edit = [
         "{$field_name}[0][uri]" => $uri,
-      );
+      ];
       $this->drupalPostForm('entity_test/add', $edit, t('Save'));
       preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
       $id = $match[1];
-      $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+      $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
       $this->assertRaw($string);
     }
   }
@@ -212,11 +212,11 @@ protected function assertValidEntries($field_name, array $valid_entries) {
    */
   protected function assertInvalidEntries($field_name, array $invalid_entries) {
     foreach ($invalid_entries as $invalid_value => $error_message) {
-      $edit = array(
+      $edit = [
         "{$field_name}[0][uri]" => $invalid_value,
-      );
+      ];
       $this->drupalPostForm('entity_test/add', $edit, t('Save'));
-      $this->assertText(t($error_message, array('@link_path' => $invalid_value)));
+      $this->assertText(t($error_message, ['@link_path' => $invalid_value]));
     }
   }
 
@@ -226,40 +226,40 @@ protected function assertInvalidEntries($field_name, array $invalid_entries) {
   function testLinkTitle() {
     $field_name = Unicode::strtolower($this->randomMachineName());
     // Create a field with settings to validate.
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'link',
-    ));
+    ]);
     $this->fieldStorage->save();
     $this->field = FieldConfig::create([
       'field_storage' => $this->fieldStorage,
       'bundle' => 'entity_test',
       'label' => 'Read more about this entity',
-      'settings' => array(
+      'settings' => [
         'title' => DRUPAL_OPTIONAL,
         'link_type' => LinkItemInterface::LINK_GENERIC,
-      ),
+      ],
     ]);
     $this->field->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'link_default',
-        'settings' => array(
+        'settings' => [
           'placeholder_url' => 'http://example.com',
           'placeholder_title' => 'Enter the text for this link',
-        ),
-      ))
+        ],
+      ])
       ->save();
     entity_get_display('entity_test', 'entity_test', 'full')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'link',
         'label' => 'hidden',
-      ))
+      ])
       ->save();
 
     // Verify that the link text field works according to the field setting.
-    foreach (array(DRUPAL_DISABLED, DRUPAL_REQUIRED, DRUPAL_OPTIONAL) as $title_setting) {
+    foreach ([DRUPAL_DISABLED, DRUPAL_REQUIRED, DRUPAL_OPTIONAL] as $title_setting) {
       // Update the link title field setting.
       $this->field->setSetting('title', $title_setting);
       $this->field->save();
@@ -281,41 +281,41 @@ function testLinkTitle() {
         $this->assertFieldByName("{$field_name}[0][title]", '', 'Link text field found.');
         if ($title_setting === DRUPAL_REQUIRED) {
           // Verify that the link text is required, if the URL is non-empty.
-          $edit = array(
+          $edit = [
             "{$field_name}[0][uri]" => 'http://www.example.com',
-          );
+          ];
           $this->drupalPostForm(NULL, $edit, t('Save'));
-          $this->assertText(t('@name field is required.', array('@name' => t('Link text'))));
+          $this->assertText(t('@name field is required.', ['@name' => t('Link text')]));
 
           // Verify that the link text is not required, if the URL is empty.
-          $edit = array(
+          $edit = [
             "{$field_name}[0][uri]" => '',
-          );
+          ];
           $this->drupalPostForm(NULL, $edit, t('Save'));
-          $this->assertNoText(t('@name field is required.', array('@name' => t('Link text'))));
+          $this->assertNoText(t('@name field is required.', ['@name' => t('Link text')]));
 
           // Verify that a URL and link text meets requirements.
           $this->drupalGet('entity_test/add');
-          $edit = array(
+          $edit = [
             "{$field_name}[0][uri]" => 'http://www.example.com',
             "{$field_name}[0][title]" => 'Example',
-          );
+          ];
           $this->drupalPostForm(NULL, $edit, t('Save'));
-          $this->assertNoText(t('@name field is required.', array('@name' => t('Link text'))));
+          $this->assertNoText(t('@name field is required.', ['@name' => t('Link text')]));
         }
       }
     }
 
     // Verify that a link without link text is rendered using the URL as text.
     $value = 'http://www.example.com/';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][uri]" => $value,
       "{$field_name}[0][title]" => '',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     $this->renderTestEntity($id);
     $expected_link = \Drupal::l($value, Url::fromUri($value));
@@ -323,11 +323,11 @@ function testLinkTitle() {
 
     // Verify that a link with text is rendered using the link text.
     $title = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       "{$field_name}[0][title]" => $title,
-    );
+    ];
     $this->drupalPostForm("entity_test/manage/$id/edit", $edit, t('Save'));
-    $this->assertText(t('entity_test @id has been updated.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been updated.', ['@id' => $id]));
 
     $this->renderTestEntity($id);
     $expected_link = \Drupal::l($title, Url::fromUri($value));
@@ -340,31 +340,31 @@ function testLinkTitle() {
   function testLinkFormatter() {
     $field_name = Unicode::strtolower($this->randomMachineName());
     // Create a field with settings to validate.
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'link',
       'cardinality' => 3,
-    ));
+    ]);
     $this->fieldStorage->save();
     FieldConfig::create([
       'field_storage' => $this->fieldStorage,
       'label' => 'Read more about this entity',
       'bundle' => 'entity_test',
-      'settings' => array(
+      'settings' => [
         'title' => DRUPAL_OPTIONAL,
         'link_type' => LinkItemInterface::LINK_GENERIC,
-      ),
+      ],
     ])->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'link_default',
-      ))
+      ])
       ->save();
-    $display_options = array(
+    $display_options = [
       'type' => 'link',
       'label' => 'hidden',
-    );
+    ];
     entity_get_display('entity_test', 'entity_test', 'full')
       ->setComponent($field_name, $display_options)
       ->save();
@@ -383,7 +383,7 @@ function testLinkFormatter() {
     // Intentionally contains an ampersand that needs sanitization on output.
     $title2 = 'A very long & strange example title that could break the nice layout of the site';
     $title3 = 'Fragment only';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][uri]" => $url1,
       // Note that $title1 is not submitted.
       "{$field_name}[0][title]" => '',
@@ -391,35 +391,35 @@ function testLinkFormatter() {
       "{$field_name}[1][title]" => $title2,
       "{$field_name}[2][uri]" => $url3,
       "{$field_name}[2][title]" => $title3,
-    );
+    ];
     // Assert label is shown.
     $this->assertText('Read more about this entity');
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     // Verify that the link is output according to the formatter settings.
     // Not using generatePermutations(), since that leads to 32 cases, which
     // would not test actual link field formatter functionality but rather
     // the link generator and options/attributes. Only 'url_plain' has a
     // dependency on 'url_only', so we have a total of ~10 cases.
-    $options = array(
-      'trim_length' => array(NULL, 6),
-      'rel' => array(NULL, 'nofollow'),
-      'target' => array(NULL, '_blank'),
-      'url_only' => array(
-        array('url_only' => FALSE),
-        array('url_only' => FALSE, 'url_plain' => TRUE),
-        array('url_only' => TRUE),
-        array('url_only' => TRUE, 'url_plain' => TRUE),
-      ),
-    );
+    $options = [
+      'trim_length' => [NULL, 6],
+      'rel' => [NULL, 'nofollow'],
+      'target' => [NULL, '_blank'],
+      'url_only' => [
+        ['url_only' => FALSE],
+        ['url_only' => FALSE, 'url_plain' => TRUE],
+        ['url_only' => TRUE],
+        ['url_only' => TRUE, 'url_plain' => TRUE],
+      ],
+    ];
     foreach ($options as $setting => $values) {
       foreach ($values as $new_value) {
         // Update the field formatter settings.
         if (!is_array($new_value)) {
-          $display_options['settings'] = array($setting => $new_value);
+          $display_options['settings'] = [$setting => $new_value];
         }
         else {
           $display_options['settings'] = $new_value;
@@ -495,29 +495,29 @@ function testLinkFormatter() {
   function testLinkSeparateFormatter() {
     $field_name = Unicode::strtolower($this->randomMachineName());
     // Create a field with settings to validate.
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'link',
       'cardinality' => 3,
-    ));
+    ]);
     $this->fieldStorage->save();
     FieldConfig::create([
       'field_storage' => $this->fieldStorage,
       'bundle' => 'entity_test',
-      'settings' => array(
+      'settings' => [
         'title' => DRUPAL_OPTIONAL,
         'link_type' => LinkItemInterface::LINK_GENERIC,
-      ),
+      ],
     ])->save();
-    $display_options = array(
+    $display_options = [
       'type' => 'link_separate',
       'label' => 'hidden',
-    );
+    ];
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'link_default',
-      ))
+      ])
       ->save();
     entity_get_display('entity_test', 'entity_test', 'full')
       ->setComponent($field_name, $display_options)
@@ -536,28 +536,28 @@ function testLinkSeparateFormatter() {
     // Intentionally contains an ampersand that needs sanitization on output.
     $title2 = 'A very long & strange example title that could break the nice layout of the site';
     $title3 = 'Fragment only';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][uri]" => $url1,
       "{$field_name}[1][uri]" => $url2,
       "{$field_name}[1][title]" => $title2,
       "{$field_name}[2][uri]" => $url3,
       "{$field_name}[2][title]" => $title3,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)));
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
 
     // Verify that the link is output according to the formatter settings.
-    $options = array(
-      'trim_length' => array(NULL, 6),
-      'rel' => array(NULL, 'nofollow'),
-      'target' => array(NULL, '_blank'),
-    );
+    $options = [
+      'trim_length' => [NULL, 6],
+      'rel' => [NULL, 'nofollow'],
+      'target' => [NULL, '_blank'],
+    ];
     foreach ($options as $setting => $values) {
       foreach ($values as $new_value) {
         // Update the field formatter settings.
-        $display_options['settings'] = array($setting => $new_value);
+        $display_options['settings'] = [$setting => $new_value];
         entity_get_display('entity_test', 'entity_test', 'full')
           ->setComponent($field_name, $display_options)
           ->save();
@@ -622,7 +622,7 @@ function testLinkSeparateFormatter() {
    */
   protected function renderTestEntity($id, $view_mode = 'full', $reset = TRUE) {
     if ($reset) {
-      $this->container->get('entity.manager')->getStorage('entity_test')->resetCache(array($id));
+      $this->container->get('entity.manager')->getStorage('entity_test')->resetCache([$id]);
     }
     $entity = EntityTest::load($id);
     $display = entity_get_display($entity->getEntityTypeId(), $entity->bundle(), $view_mode);
diff --git a/core/modules/link/src/Tests/Views/LinkViewsTokensTest.php b/core/modules/link/src/Tests/Views/LinkViewsTokensTest.php
index ec06ca614f9408a98a61fb37fb4e09d17b24e1f9..80913ece8dd618ec77d7b3ff98ea5a60264ee06d 100644
--- a/core/modules/link/src/Tests/Views/LinkViewsTokensTest.php
+++ b/core/modules/link/src/Tests/Views/LinkViewsTokensTest.php
@@ -40,27 +40,27 @@ class LinkViewsTokensTest extends ViewTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    ViewTestData::createTestViews(get_class($this), array('link_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['link_test_views']);
 
     // Create Basic page node type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'page',
       'name' => 'Basic page'
-    ));
+    ]);
 
     // Create a field.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'type' => 'link',
       'entity_type' => 'node',
       'cardinality' => 1,
-    ))->save();
-    FieldConfig::create(array(
+    ])->save();
+    FieldConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'node',
       'bundle' => 'page',
       'label' => 'link field',
-    ))->save();
+    ])->save();
 
   }
 
@@ -72,7 +72,7 @@ public function testLinkViewsTokens() {
 
     // Add nodes with the URI's and titles.
     foreach ($uris as $uri => $title) {
-      $values = array('type' => 'page');
+      $values = ['type' => 'page'];
       $values[$this->fieldName][] = ['uri' => $uri, 'title' => $title, 'options' => ['attributes' => ['class' => 'test-link-class']]];
       $this->drupalCreateNode($values);
     }
diff --git a/core/modules/link/tests/src/Functional/LinkFieldUITest.php b/core/modules/link/tests/src/Functional/LinkFieldUITest.php
index eeed78c4c0f9fe5881789813c2b606224ca9ffb6..c990e6439dc8f87f74f72cf599975f8901f21198 100644
--- a/core/modules/link/tests/src/Functional/LinkFieldUITest.php
+++ b/core/modules/link/tests/src/Functional/LinkFieldUITest.php
@@ -60,7 +60,7 @@ function testFieldUI() {
     // generate warnings.
     // @todo Mess with the formatter settings a bit here.
     $this->drupalGet("$type_path/display");
-    $this->assertText(t('Link text trimmed to @limit characters', array('@limit' => 80)));
+    $this->assertText(t('Link text trimmed to @limit characters', ['@limit' => 80]));
 
     // Test the help text displays when the link field allows both internal and
     // external links.
@@ -81,7 +81,7 @@ function testFieldUI() {
     $label = $this->randomMachineName();
     $field_name = Unicode::strtolower($label);
     $field_edit = ['settings[link_type]' => LinkItemInterface::LINK_EXTERNAL];
-    $this->fieldUIAddNewField($type_path, $field_name, $label, 'link', array(), $field_edit);
+    $this->fieldUIAddNewField($type_path, $field_name, $label, 'link', [], $field_edit);
 
     // Test the help text displays when link allows only external links.
     $this->drupalLogin($this->drupalCreateUser(['create ' . $type->id() . ' content']));
diff --git a/core/modules/link/tests/src/Kernel/LinkItemTest.php b/core/modules/link/tests/src/Kernel/LinkItemTest.php
index 5e2c45dbbb3d987de8546d1fe5c4de7f1386af70..ff4f8405678f49dbd0d7ea0d55a9cd55c92771d7 100644
--- a/core/modules/link/tests/src/Kernel/LinkItemTest.php
+++ b/core/modules/link/tests/src/Kernel/LinkItemTest.php
@@ -24,7 +24,7 @@ class LinkItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('link');
+  public static $modules = ['link'];
 
   protected function setUp() {
     parent::setUp();
@@ -78,7 +78,7 @@ public function testLinkItem() {
     $entity->field_test->uri = $parsed_url['path'];
     $entity->field_test->title = $title;
     $entity->field_test->first()->get('options')->set('query', $parsed_url['query']);
-    $entity->field_test->first()->get('options')->set('attributes', array('class' => $class));
+    $entity->field_test->first()->get('options')->set('attributes', ['class' => $class]);
     $this->assertEquals([
       'query' => $parsed_url['query'],
       'attributes' => [
@@ -118,7 +118,7 @@ public function testLinkItem() {
     $entity->field_test->uri = $new_url;
     $entity->field_test->title = $new_title;
     $entity->field_test->first()->get('options')->set('query', NULL);
-    $entity->field_test->first()->get('options')->set('attributes', array('class' => $new_class));
+    $entity->field_test->first()->get('options')->set('attributes', ['class' => $new_class]);
     $this->assertEqual($entity->field_test->uri, $new_url);
     $this->assertEqual($entity->field_test->title, $new_title);
     $this->assertEqual($entity->field_test->options['attributes']['class'], $new_class);
diff --git a/core/modules/locale/locale.api.php b/core/modules/locale/locale.api.php
index 56210e54f49ad8a06dcfafb380bbe22b5a02243f..3cf1e12ea776f26b3a626835dbfe19b49ab9aff4 100644
--- a/core/modules/locale/locale.api.php
+++ b/core/modules/locale/locale.api.php
@@ -116,11 +116,11 @@
  */
 function hook_locale_translation_projects_alter(&$projects) {
   // The translations are located at a custom translation sever.
-  $projects['existing_project'] = array(
-    'info' => array(
+  $projects['existing_project'] = [
+    'info' => [
       'interface translation server pattern' => 'http://example.com/files/translations/%core/%project/%project-%version.%language.po',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/locale/locale.batch.inc b/core/modules/locale/locale.batch.inc
index 81ca96667134f09149a2932f27f851bd0f671014..a18f993f55f3cdb723358cf9f76ce6d681782666 100644
--- a/core/modules/locale/locale.batch.inc
+++ b/core/modules/locale/locale.batch.inc
@@ -38,11 +38,11 @@
  */
 function locale_translation_batch_status_check($project, $langcode, array $options, &$context) {
   $failure = $checked = FALSE;
-  $options += array(
+  $options += [
     'finish_feedback' => TRUE,
     'use_remote' => TRUE,
-  );
-  $source = locale_translation_get_status(array($project), array($langcode));
+  ];
+  $source = locale_translation_get_status([$project], [$langcode]);
   $source = $source[$project][$langcode];
 
   // Check the status of local translation files.
@@ -82,7 +82,7 @@ function locale_translation_batch_status_check($project, $langcode, array $optio
   if ($failure && !$checked) {
     $context['results']['failed_files'][] = $source->name;
   }
-  $context['message'] = t('Checked translation for %project.', array('%project' => $source->project));
+  $context['message'] = t('Checked translation for %project.', ['%project' => $source->project]);
 }
 
 /**
@@ -99,7 +99,7 @@ function locale_translation_batch_status_finished($success, $results) {
   if ($success) {
     if (isset($results['failed_files'])) {
       if (\Drupal::moduleHandler()->moduleExists('dblog') && \Drupal::currentUser()->hasPermission('access site reports')) {
-        $message = \Drupal::translation()->formatPlural(count($results['failed_files']), 'One translation file could not be checked. <a href=":url">See the log</a> for details.', '@count translation files could not be checked. <a href=":url">See the log</a> for details.', array(':url' => \Drupal::url('dblog.overview')));
+        $message = \Drupal::translation()->formatPlural(count($results['failed_files']), 'One translation file could not be checked. <a href=":url">See the log</a> for details.', '@count translation files could not be checked. <a href=":url">See the log</a> for details.', [':url' => \Drupal::url('dblog.overview')]);
       }
       else {
         $message = \Drupal::translation()->formatPlural(count($results['failed_files']), 'One translation files could not be checked. See the log for details.', '@count translation files could not be checked. See the log for details.');
@@ -139,12 +139,12 @@ function locale_translation_batch_status_finished($success, $results) {
  * @see locale_translation_batch_fetch_import()
  */
 function locale_translation_batch_fetch_download($project, $langcode, &$context) {
-  $sources = locale_translation_get_status(array($project), array($langcode));
+  $sources = locale_translation_get_status([$project], [$langcode]);
   if (isset($sources[$project][$langcode])) {
     $source = $sources[$project][$langcode];
     if (isset($source->type) && $source->type == LOCALE_TRANSLATION_REMOTE) {
       if ($file = locale_translation_download_source($source->files[LOCALE_TRANSLATION_REMOTE], 'translations://')) {
-        $context['message'] = t('Downloaded translation for %project.', array('%project' => $source->project));
+        $context['message'] = t('Downloaded translation for %project.', ['%project' => $source->project]);
         locale_translation_status_save($source->name, $source->langcode, LOCALE_TRANSLATION_LOCAL, $file);
       }
       else {
@@ -173,16 +173,16 @@ function locale_translation_batch_fetch_download($project, $langcode, &$context)
  * @see locale_translation_batch_fetch_download()
  */
 function locale_translation_batch_fetch_import($project, $langcode, $options, &$context) {
-  $sources = locale_translation_get_status(array($project), array($langcode));
+  $sources = locale_translation_get_status([$project], [$langcode]);
   if (isset($sources[$project][$langcode])) {
     $source = $sources[$project][$langcode];
     if (isset($source->type)) {
       if ($source->type == LOCALE_TRANSLATION_REMOTE || $source->type == LOCALE_TRANSLATION_LOCAL) {
         $file = $source->files[LOCALE_TRANSLATION_LOCAL];
         module_load_include('bulk.inc', 'locale');
-        $options += array(
-          'message' => t('Importing translation for %project.', array('%project' => $source->project)),
-        );
+        $options += [
+          'message' => t('Importing translation for %project.', ['%project' => $source->project]),
+        ];
         // Import the translation file. For large files the batch operations is
         // progressive and will be called repeatedly until finished.
         locale_translate_batch_import($file, $options, $context);
@@ -191,7 +191,7 @@ function locale_translation_batch_fetch_import($project, $langcode, $options, &$
         if (isset($context['finished']) && $context['finished'] == 1) {
           // The import is successful.
           if (isset($context['results']['files'][$file->uri])) {
-            $context['message'] = t('Imported translation for %project.', array('%project' => $source->project));
+            $context['message'] = t('Imported translation for %project.', ['%project' => $source->project]);
 
             // Save the data of imported source into the {locale_file} table and
             // update the current translation status.
@@ -243,7 +243,7 @@ function locale_translation_http_check($uri) {
         $actual_uri = (string) $request_uri;
       }
     ]])->head($uri);
-    $result = array();
+    $result = [];
 
     // Return the effective URL if it differs from the requested.
     if ($actual_uri && $actual_uri !== $uri) {
@@ -262,10 +262,10 @@ function locale_translation_http_check($uri) {
         // theme does not define the location of a translation file. By default
         // the file is checked at the translation server, but it will not be
         // found there.
-        $logger->notice('Translation file not found: @uri.', array('@uri' => $uri));
+        $logger->notice('Translation file not found: @uri.', ['@uri' => $uri]);
         return TRUE;
       }
-      $logger->notice('HTTP request to @url failed with error: @error.', array('@url' => $uri, '@error' => $response->getStatusCode() . ' ' . $response->getReasonPhrase()));
+      $logger->notice('HTTP request to @url failed with error: @error.', ['@url' => $uri, '@error' => $response->getStatusCode() . ' ' . $response->getReasonPhrase()]);
     }
   }
 
@@ -298,6 +298,6 @@ function locale_translation_download_source($source_file, $directory = 'temporar
     $file->timestamp = filemtime($uri);
     return $file;
   }
-  \Drupal::logger('locale')->error('Unable to download translation file @uri.', array('@uri' => $source_file->uri));
+  \Drupal::logger('locale')->error('Unable to download translation file @uri.', ['@uri' => $source_file->uri]);
   return FALSE;
 }
diff --git a/core/modules/locale/locale.bulk.inc b/core/modules/locale/locale.bulk.inc
index 1181b50f270a3010d7398da16c6c28921a3eaf0d..81261e7aca4ef229d4fb112cebbbadfeae47552e 100644
--- a/core/modules/locale/locale.bulk.inc
+++ b/core/modules/locale/locale.bulk.inc
@@ -37,14 +37,14 @@
  *   See https://www.drupal.org/node/1191488.
  */
 function locale_translate_batch_import_files(array $options, $force = FALSE) {
-  $options += array(
-    'overwrite_options' => array(),
+  $options += [
+    'overwrite_options' => [],
     'customized' => LOCALE_NOT_CUSTOMIZED,
     'finish_feedback' => TRUE,
-  );
+  ];
 
   if (!empty($options['langcode'])) {
-    $langcodes = array($options['langcode']);
+    $langcodes = [$options['langcode']];
   }
   else {
     // If langcode was not provided, make sure to only import files for the
@@ -52,11 +52,11 @@ function locale_translate_batch_import_files(array $options, $force = FALSE) {
     $langcodes = array_keys(\Drupal::languageManager()->getLanguages());
   }
 
-  $files = locale_translate_get_interface_translation_files(array(), $langcodes);
+  $files = locale_translate_get_interface_translation_files([], $langcodes);
 
   if (!$force) {
     $result = db_select('locale_file', 'lf')
-      ->fields('lf', array('langcode', 'uri', 'timestamp'))
+      ->fields('lf', ['langcode', 'uri', 'timestamp'])
       ->condition('langcode', $langcodes)
       ->execute()
       ->fetchAllAssoc('uri');
@@ -84,9 +84,9 @@ function locale_translate_batch_import_files(array $options, $force = FALSE) {
  * @return array
  *   An array of interface translation files keyed by their URI.
  */
-function locale_translate_get_interface_translation_files(array $projects = array(), array $langcodes = array()) {
+function locale_translate_get_interface_translation_files(array $projects = [], array $langcodes = []) {
   module_load_include('compare.inc', 'locale');
-  $files = array();
+  $files = [];
   $projects = $projects ? $projects : array_keys(locale_translation_get_projects());
   $langcodes = $langcodes ? $langcodes : array_keys(locale_translatable_language_list());
 
@@ -95,7 +95,7 @@ function locale_translate_get_interface_translation_files(array $projects = arra
   // {project}-{version}.{langcode}.po.
   // Only files of known projects and languages will be returned.
   $directory = \Drupal::config('locale.settings')->get('translation.path');
-  $result = file_scan_directory($directory, '![a-z_]+(\-[0-9a-z\.\-\+]+|)\.[^\./]+\.po$!', array('recurse' => FALSE));
+  $result = file_scan_directory($directory, '![a-z_]+(\-[0-9a-z\.\-\+]+|)\.[^\./]+\.po$!', ['recurse' => FALSE]);
 
   foreach ($result as $file) {
     // Update the file object with project name and version from the file name.
@@ -132,30 +132,30 @@ function locale_translate_get_interface_translation_files(array $projects = arra
  *   A batch structure or FALSE if $files was empty.
  */
 function locale_translate_batch_build(array $files, array $options) {
-  $options += array(
-    'overwrite_options' => array(),
+  $options += [
+    'overwrite_options' => [],
     'customized' => LOCALE_NOT_CUSTOMIZED,
     'finish_feedback' => TRUE,
-  );
+  ];
   if (count($files)) {
-    $operations = array();
+    $operations = [];
     foreach ($files as $file) {
       // We call locale_translate_batch_import for every batch operation.
-      $operations[] = array('locale_translate_batch_import', array($file, $options));
+      $operations[] = ['locale_translate_batch_import', [$file, $options]];
     }
     // Save the translation status of all files.
-    $operations[] = array('locale_translate_batch_import_save', array());
+    $operations[] = ['locale_translate_batch_import_save', []];
 
     // Add a final step to refresh JavaScript and configuration strings.
-    $operations[] = array('locale_translate_batch_refresh', array());
+    $operations[] = ['locale_translate_batch_refresh', []];
 
-    $batch = array(
+    $batch = [
       'operations'    => $operations,
       'title'         => t('Importing interface translations'),
       'progress_message' => '',
       'error_message' => t('Error importing interface translations'),
       'file'          => drupal_get_path('module', 'locale') . '/locale.bulk.inc',
-    );
+    ];
     if ($options['finish_feedback']) {
       $batch['finished'] = 'locale_translate_batch_finished';
     }
@@ -190,20 +190,20 @@ function locale_translate_batch_build(array $files, array $options) {
  */
 function locale_translate_batch_import($file, array $options, &$context) {
   // Merge the default values in the $options array.
-  $options += array(
-    'overwrite_options' => array(),
+  $options += [
+    'overwrite_options' => [],
     'customized' => LOCALE_NOT_CUSTOMIZED,
-  );
+  ];
 
   if (isset($file->langcode) && $file->langcode != LanguageInterface::LANGCODE_NOT_SPECIFIED) {
 
     try {
       if (empty($context['sandbox'])) {
-        $context['sandbox']['parse_state'] = array(
+        $context['sandbox']['parse_state'] = [
           'filesize' => filesize(drupal_realpath($file->uri)),
           'chunk_size' => 200,
           'seek' => 0,
-        );
+        ];
       }
       // Update the seek and the number of items in the $options array().
       $options['seek'] = $context['sandbox']['parse_state']['seek'];
@@ -220,10 +220,10 @@ function locale_translate_batch_import($file, array $options, &$context) {
         // https://www.drupal.org/node/1089472.
         $context['finished'] = min(0.95, $report['seek'] / filesize($file->uri));
         if (isset($options['message'])) {
-          $context['message'] = t('@message (@percent%).', array('@message' => $options['message'], '@percent' => (int) ($context['finished'] * 100)));
+          $context['message'] = t('@message (@percent%).', ['@message' => $options['message'], '@percent' => (int) ($context['finished'] * 100)]);
         }
         else {
-          $context['message'] = t('Importing translation file: %filename (@percent%).', array('%filename' => $file->filename, '@percent' => (int) ($context['finished'] * 100)));
+          $context['message'] = t('Importing translation file: %filename (@percent%).', ['%filename' => $file->filename, '@percent' => (int) ($context['finished'] * 100)]);
         }
       }
       else {
@@ -240,7 +240,7 @@ function locale_translate_batch_import($file, array $options, &$context) {
       // Each import iteration reports statistics in an array. The results of
       // each iteration are added and merged here and stored per file.
       if (!isset($context['results']['stats']) || !isset($context['results']['stats'][$file->uri])) {
-        $context['results']['stats'][$file->uri] = array();
+        $context['results']['stats'][$file->uri] = [];
       }
       foreach ($report as $key => $value) {
         if (is_numeric($report[$key])) {
@@ -250,7 +250,7 @@ function locale_translate_batch_import($file, array $options, &$context) {
           $context['results']['stats'][$file->uri][$key] += $report[$key];
         }
         elseif (is_array($value)) {
-          $context['results']['stats'][$file->uri] += array($key => array());
+          $context['results']['stats'][$file->uri] += [$key => []];
           $context['results']['stats'][$file->uri][$key] = array_merge($context['results']['stats'][$file->uri][$key], $value);
         }
       }
@@ -258,7 +258,7 @@ function locale_translate_batch_import($file, array $options, &$context) {
     catch (Exception $exception) {
       // Import failed. Store the data of the failing file.
       $context['results']['failed_files'][] = $file;
-      \Drupal::logger('locale')->notice('Unable to import translations file: @file', array('@file' => $file->uri));
+      \Drupal::logger('locale')->notice('Unable to import translations file: @file', ['@file' => $file->uri]);
     }
   }
 }
@@ -298,7 +298,7 @@ function locale_translate_batch_import_save($context) {
  */
 function locale_translate_batch_refresh(&$context) {
   if (!isset($context['sandbox']['refresh'])) {
-    $strings = $langcodes = array();
+    $strings = $langcodes = [];
     if (isset($context['results']['stats'])) {
       // Get list of unique string identifiers and language codes updated.
       $langcodes = array_unique(array_values($context['results']['languages']));
@@ -311,7 +311,7 @@ function locale_translate_batch_refresh(&$context) {
       $context['message'] = t('Updating translations for JavaScript and default configuration.');
       $context['sandbox']['refresh']['strings'] = array_unique($strings);
       $context['sandbox']['refresh']['languages'] = $langcodes;
-      $context['sandbox']['refresh']['names'] = array();
+      $context['sandbox']['refresh']['names'] = [];
       $context['results']['stats']['config'] = 0;
       $context['sandbox']['refresh']['count'] = count($strings);
 
@@ -324,12 +324,12 @@ function locale_translate_batch_refresh(&$context) {
   }
   elseif ($name = array_shift($context['sandbox']['refresh']['names'])) {
     // Refresh all languages for one object at a time.
-    $count = Locale::config()->updateConfigTranslations(array($name), $context['sandbox']['refresh']['languages']);
+    $count = Locale::config()->updateConfigTranslations([$name], $context['sandbox']['refresh']['languages']);
     $context['results']['stats']['config'] += $count;
     // Inherit finished information from the "parent" string lookup step so
     // visual display of status will make sense.
     $context['finished'] = $context['sandbox']['refresh']['names_finished'];
-    $context['message'] = t('Updating default configuration (@percent%).', array('@percent' => (int) ($context['finished'] * 100)));
+    $context['message'] = t('Updating default configuration (@percent%).', ['@percent' => (int) ($context['finished'] * 100)]);
   }
   elseif (!empty($context['sandbox']['refresh']['strings'])) {
     // Not perfect but will give some indication of progress.
@@ -367,7 +367,7 @@ function locale_translate_batch_finished($success, array $results) {
     $additions = $updates = $deletes = $skips = $config = 0;
     if (isset($results['failed_files'])) {
       if (\Drupal::moduleHandler()->moduleExists('dblog') && \Drupal::currentUser()->hasPermission('access site reports')) {
-        $message = \Drupal::translation()->formatPlural(count($results['failed_files']), 'One translation file could not be imported. <a href=":url">See the log</a> for details.', '@count translation files could not be imported. <a href=":url">See the log</a> for details.', array(':url' => \Drupal::url('dblog.overview')));
+        $message = \Drupal::translation()->formatPlural(count($results['failed_files']), 'One translation file could not be imported. <a href=":url">See the log</a> for details.', '@count translation files could not be imported. <a href=":url">See the log</a> for details.', [':url' => \Drupal::url('dblog.overview')]);
       }
       else {
         $message = \Drupal::translation()->formatPlural(count($results['failed_files']), 'One translation file could not be imported. See the log for details.', '@count translation files could not be imported. See the log for details.');
@@ -375,7 +375,7 @@ function locale_translate_batch_finished($success, array $results) {
       drupal_set_message($message, 'error');
     }
     if (isset($results['files'])) {
-      $skipped_files = array();
+      $skipped_files = [];
       // If there are no results and/or no stats (eg. coping with an empty .po
       // file), simply do nothing.
       if ($results && isset($results['stats'])) {
@@ -392,19 +392,19 @@ function locale_translate_batch_finished($success, array $results) {
       drupal_set_message(\Drupal::translation()->formatPlural(count($results['files']),
         'One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.',
         '@count translation files imported. %number translations were added, %update translations were updated and %delete translations were removed.',
-        array('%number' => $additions, '%update' => $updates, '%delete' => $deletes)
+        ['%number' => $additions, '%update' => $updates, '%delete' => $deletes]
       ));
-      $logger->notice('Translations imported: %number added, %update updated, %delete removed.', array('%number' => $additions, '%update' => $updates, '%delete' => $deletes));
+      $logger->notice('Translations imported: %number added, %update updated, %delete removed.', ['%number' => $additions, '%update' => $updates, '%delete' => $deletes]);
 
       if ($skips) {
         if (\Drupal::moduleHandler()->moduleExists('dblog') && \Drupal::currentUser()->hasPermission('access site reports')) {
-          $message = \Drupal::translation()->formatPlural($skips, 'One translation string was skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', '@count translation strings were skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', array(':url' => \Drupal::url('dblog.overview')));
+          $message = \Drupal::translation()->formatPlural($skips, 'One translation string was skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', '@count translation strings were skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', [':url' => \Drupal::url('dblog.overview')]);
         }
         else {
           $message = \Drupal::translation()->formatPlural($skips, 'One translation string was skipped because of disallowed or malformed HTML. See the log for details.', '@count translation strings were skipped because of disallowed or malformed HTML. See the log for details.');
         }
         drupal_set_message($message, 'warning');
-        $logger->warning('@count disallowed HTML string(s) in files: @files.', array('@count' => $skips, '@files' => implode(',', $skipped_files)));
+        $logger->warning('@count disallowed HTML string(s) in files: @files.', ['@count' => $skips, '@files' => implode(',', $skipped_files)]);
       }
     }
   }
@@ -448,13 +448,13 @@ function locale_translate_file_create($filepath) {
  * @return object
  *   Modified file object.
  */
-function locale_translate_file_attach_properties($file, array $options = array()) {
+function locale_translate_file_attach_properties($file, array $options = []) {
   // If $file is a file entity, convert it to a stdClass.
   if ($file instanceof FileInterface) {
-    $file = (object) array(
+    $file = (object) [
       'filename' => $file->getFilename(),
       'uri' => $file->getFileUri(),
-    );
+    ];
   }
 
   // Extract project, version and language code from the file name. Supported:
@@ -499,7 +499,7 @@ function locale_translate_file_attach_properties($file, array $options = array()
  *   TRUE if files are removed successfully. FALSE if one or more files could
  *   not be deleted.
  */
-function locale_translate_delete_translation_files(array $projects = array(), array $langcodes = array()) {
+function locale_translate_delete_translation_files(array $projects = [], array $langcodes = []) {
   $fail = FALSE;
   locale_translation_file_history_delete($projects, $langcodes);
 
@@ -531,7 +531,7 @@ function locale_translate_delete_translation_files(array $projects = array(), ar
  * @return array
  *   The batch definition.
  */
-function locale_config_batch_update_components(array $options, array $langcodes = array(), array $components = array()) {
+function locale_config_batch_update_components(array $options, array $langcodes = [], array $components = []) {
   $langcodes = $langcodes ? $langcodes : array_keys(\Drupal::languageManager()->getLanguages());
   if ($langcodes && $names = Locale::config()->getComponentNames($components)) {
     return locale_config_batch_build($names, $langcodes, $options);
@@ -555,11 +555,11 @@ function locale_config_batch_update_components(array $options, array $langcodes
  *
  * @see locale_config_batch_refresh_name()
  */
-function locale_config_batch_build(array $names, array $langcodes, array $options = array()) {
-  $options += array('finish_feedback' => TRUE);
+function locale_config_batch_build(array $names, array $langcodes, array $options = []) {
+  $options += ['finish_feedback' => TRUE];
   $i = 0;
-  $batch_names = array();
-  $operations = array();
+  $batch_names = [];
+  $operations = [];
   foreach ($names as $name) {
     $batch_names[] = $name;
     $i++;
@@ -568,20 +568,20 @@ function locale_config_batch_build(array $names, array $langcodes, array $option
     // request. We batch a small number of configuration object upgrades
     // together to improve the overall performance of the process.
     if ($i % 20 == 0) {
-      $operations[] = array('locale_config_batch_refresh_name', array($batch_names, $langcodes));
-      $batch_names = array();
+      $operations[] = ['locale_config_batch_refresh_name', [$batch_names, $langcodes]];
+      $batch_names = [];
     }
   }
   if (!empty($batch_names)) {
-    $operations[] = array('locale_config_batch_refresh_name', array($batch_names, $langcodes));
+    $operations[] = ['locale_config_batch_refresh_name', [$batch_names, $langcodes]];
   }
-  $batch = array(
+  $batch = [
     'operations'    => $operations,
     'title'         => t('Updating configuration translations'),
     'init_message'  => t('Starting configuration update'),
     'error_message' => t('Error updating configuration translations'),
     'file'          => drupal_get_path('module', 'locale') . '/locale.bulk.inc',
-  );
+  ];
   if (!empty($options['finish_feedback'])) {
     $batch['completed'] = 'locale_config_batch_finished';
   }
@@ -630,8 +630,8 @@ function locale_config_batch_finished($success, array $results) {
   if ($success) {
     $configuration = isset($results['stats']['config']) ? $results['stats']['config'] : 0;
     if ($configuration) {
-      drupal_set_message(t('The configuration was successfully updated. There are %number configuration objects updated.', array('%number' => $configuration)));
-      \Drupal::logger('locale')->notice('The configuration was successfully updated. %number configuration objects updated.', array('%number' => $configuration));
+      drupal_set_message(t('The configuration was successfully updated. There are %number configuration objects updated.', ['%number' => $configuration]));
+      \Drupal::logger('locale')->notice('The configuration was successfully updated. %number configuration objects updated.', ['%number' => $configuration]);
     }
     else {
       drupal_set_message(t('No configuration objects have been updated.'));
diff --git a/core/modules/locale/locale.compare.inc b/core/modules/locale/locale.compare.inc
index e24490c30590bf3e82ce07bb01bc193009ef60dc..3821284bd706c6c907f8a8ef63462a0b31961f32 100644
--- a/core/modules/locale/locale.compare.inc
+++ b/core/modules/locale/locale.compare.inc
@@ -66,7 +66,7 @@ function locale_translation_build_projects() {
     }
 
     // For every project store information.
-    $data += array(
+    $data += [
       'name' => $name,
       'version' => isset($data['info']['version']) ? $data['info']['version'] : '',
       'core' => isset($data['info']['core']) ? $data['info']['core'] : \Drupal::CORE_COMPATIBILITY,
@@ -74,7 +74,7 @@ function locale_translation_build_projects() {
       // gettext file. Use the default if not.
       'server_pattern' => isset($data['info']['interface translation server pattern']) && $data['info']['interface translation server pattern'] ? $data['info']['interface translation server pattern'] : $default_server['pattern'],
       'status' => !empty($data['project_status']) ? 1 : 0,
-    );
+    ];
 
     $project = (object) $data;
     $projects[$name] = $project;
@@ -95,14 +95,14 @@ function locale_translation_build_projects() {
  *   Array of project data including .info.yml file data.
  */
 function locale_translation_project_list() {
-  $projects = &drupal_static(__FUNCTION__, array());
+  $projects = &drupal_static(__FUNCTION__, []);
   if (empty($projects)) {
-    $projects = array();
+    $projects = [];
 
-    $additional_whitelist = array(
+    $additional_whitelist = [
       'interface translation project',
       'interface translation server pattern',
-    );
+    ];
     $module_data = _locale_translation_prepare_project_list(system_rebuild_module_data(), 'module');
     $theme_data = _locale_translation_prepare_project_list(\Drupal::service('theme_handler')->rebuildThemeData(), 'theme');
     $project_info = new ProjectInfo();
@@ -163,9 +163,9 @@ function locale_translation_default_translation_server() {
   // fallback.
   $pattern  = $pattern ? $pattern : LOCALE_TRANSLATION_DEFAULT_SERVER_PATTERN;
 
-  return array(
+  return [
     'pattern' => $pattern,
-  );
+  ];
 }
 
 /**
@@ -181,7 +181,7 @@ function locale_translation_default_translation_server() {
  *
  * @todo Return batch or NULL.
  */
-function locale_translation_check_projects($projects = array(), $langcodes = array()) {
+function locale_translation_check_projects($projects = [], $langcodes = []) {
   if (locale_translation_use_remote_source()) {
     // Retrieve the status of both remote and local translation sources by
     // using a batch process.
@@ -207,7 +207,7 @@ function locale_translation_check_projects($projects = array(), $langcodes = arr
  * @param string $langcodes
  *   Array of language codes. Defaults to all translatable languages.
  */
-function locale_translation_check_projects_batch($projects = array(), $langcodes = array()) {
+function locale_translation_check_projects_batch($projects = [], $langcodes = []) {
   // Build and set the batch process.
   $batch = locale_translation_batch_status_build($projects, $langcodes);
   batch_set($batch);
@@ -231,21 +231,21 @@ function locale_translation_check_projects_batch($projects = array(), $langcodes
  * @return array
  *   Batch definition array.
  */
-function locale_translation_batch_status_build($projects = array(), $langcodes = array()) {
+function locale_translation_batch_status_build($projects = [], $langcodes = []) {
   $projects = $projects ? $projects : array_keys(locale_translation_get_projects());
   $langcodes = $langcodes ? $langcodes : array_keys(locale_translatable_language_list());
   $options = _locale_translation_default_update_options();
 
   $operations = _locale_translation_batch_status_operations($projects, $langcodes, $options);
 
-  $batch = array(
+  $batch = [
     'operations' => $operations,
     'title' => t('Checking translations'),
     'progress_message' => '',
     'finished' => 'locale_translation_batch_status_finished',
     'error_message' => t('Error checking translation updates.'),
     'file' => drupal_get_path('module', 'locale') . '/locale.batch.inc',
-  );
+  ];
   return $batch;
 }
 
@@ -263,13 +263,13 @@ function locale_translation_batch_status_build($projects = array(), $langcodes =
  * @return array
  *   Array of batch operations.
  */
-function _locale_translation_batch_status_operations($projects, $langcodes, $options = array()) {
-  $operations = array();
+function _locale_translation_batch_status_operations($projects, $langcodes, $options = []) {
+  $operations = [];
 
   foreach ($projects as $project) {
     foreach ($langcodes as $langcode) {
       // Check status of local and remote translation sources.
-      $operations[] = array('locale_translation_batch_status_check', array($project, $langcode, $options));
+      $operations[] = ['locale_translation_batch_status_check', [$project, $langcode, $options]];
     }
   }
 
@@ -295,7 +295,7 @@ function _locale_translation_batch_status_operations($projects, $langcodes, $opt
  * @param array $langcodes
  *   Array of language codes. Defaults to all translatable languages.
  */
-function locale_translation_check_projects_local($projects = array(), $langcodes = array()) {
+function locale_translation_check_projects_local($projects = [], $langcodes = []) {
   $projects = locale_translation_get_projects($projects);
   $langcodes = $langcodes ? $langcodes : array_keys(locale_translatable_language_list());
 
diff --git a/core/modules/locale/locale.fetch.inc b/core/modules/locale/locale.fetch.inc
index 32796a2bf2715cf1e52253cc7eb415bc89fd8957..1de693447349b1435adac1d463ceaa8221e7b6f9 100644
--- a/core/modules/locale/locale.fetch.inc
+++ b/core/modules/locale/locale.fetch.inc
@@ -26,7 +26,7 @@
  * @return array
  *   Batch definition array.
  */
-function locale_translation_batch_update_build($projects = array(), $langcodes = array(), $options = array()) {
+function locale_translation_batch_update_build($projects = [], $langcodes = [], $options = []) {
   module_load_include('compare.inc', 'locale');
   $projects = $projects ? $projects : array_keys(locale_translation_get_projects());
   $langcodes = $langcodes ? $langcodes : array_keys(locale_translatable_language_list());
@@ -38,14 +38,14 @@ function locale_translation_batch_update_build($projects = array(), $langcodes =
   // Download and import translations.
   $operations = array_merge($operations, _locale_translation_fetch_operations($projects, $langcodes, $options));
 
-  $batch = array(
+  $batch = [
     'operations' => $operations,
     'title' => t('Updating translations'),
     'progress_message' => '',
     'error_message' => t('Error importing translation files'),
     'finished' => 'locale_translation_batch_fetch_finished',
     'file' => drupal_get_path('module', 'locale') . '/locale.batch.inc',
-  );
+  ];
   return $batch;
 }
 
@@ -63,18 +63,18 @@ function locale_translation_batch_update_build($projects = array(), $langcodes =
  * @return array
  *   Batch definition array.
  */
-function locale_translation_batch_fetch_build($projects = array(), $langcodes = array(), $options = array()) {
+function locale_translation_batch_fetch_build($projects = [], $langcodes = [], $options = []) {
   $projects = $projects ? $projects : array_keys(locale_translation_get_projects());
   $langcodes = $langcodes ? $langcodes : array_keys(locale_translatable_language_list());
 
-  $batch = array(
+  $batch = [
     'operations' => _locale_translation_fetch_operations($projects, $langcodes, $options),
     'title' => t('Updating translations.'),
     'progress_message' => '',
     'error_message' => t('Error importing translation files'),
     'finished' => 'locale_translation_batch_fetch_finished',
     'file' => drupal_get_path('module', 'locale') . '/locale.batch.inc',
-  );
+  ];
   return $batch;
 }
 
@@ -93,14 +93,14 @@ function locale_translation_batch_fetch_build($projects = array(), $langcodes =
  *   Array of batch operations.
  */
 function _locale_translation_fetch_operations($projects, $langcodes, $options) {
-  $operations = array();
+  $operations = [];
 
   foreach ($projects as $project) {
     foreach ($langcodes as $langcode) {
       if (locale_translation_use_remote_source()) {
-        $operations[] = array('locale_translation_batch_fetch_download', array($project, $langcode));
+        $operations[] = ['locale_translation_batch_fetch_download', [$project, $langcode]];
       }
-      $operations[] = array('locale_translation_batch_fetch_import', array($project, $langcode, $options));
+      $operations[] = ['locale_translation_batch_fetch_import', [$project, $langcode, $options]];
     }
   }
 
diff --git a/core/modules/locale/locale.install b/core/modules/locale/locale.install
index a66a5337d6a06e70ad38366af7f4c387253b9567..f225a6274fdeba63ce5c3ecb7fe0a8462cf49168 100644
--- a/core/modules/locale/locale.install
+++ b/core/modules/locale/locale.install
@@ -29,7 +29,7 @@ function locale_uninstall() {
   $locale_js_directory = 'public://' . $config->get('javascript.directory');
 
   if (is_dir($locale_js_directory)) {
-    $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: array();
+    $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: [];
     foreach ($locale_javascripts as $langcode => $file_suffix) {
       if (!empty($file_suffix)) {
         file_unmanaged_delete($locale_js_directory . '/' . $langcode . '_' . $file_suffix . '.js');
@@ -51,183 +51,183 @@ function locale_uninstall() {
  * Implements hook_schema().
  */
 function locale_schema() {
-  $schema['locales_source'] = array(
+  $schema['locales_source'] = [
     'description' => 'List of English source strings.',
-    'fields' => array(
-      'lid' => array(
+    'fields' => [
+      'lid' => [
         'type' => 'serial',
         'not null' => TRUE,
         'description' => 'Unique identifier of this string.',
-      ),
-      'source' => array(
+      ],
+      'source' => [
         'type' => 'text',
         'mysql_type' => 'blob',
         'not null' => TRUE,
         'description' => 'The original string in English.',
-      ),
-      'context' => array(
+      ],
+      'context' => [
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'The context this string applies to.',
-      ),
-      'version' => array(
+      ],
+      'version' => [
         'type' => 'varchar_ascii',
         'length' => 20,
         'not null' => TRUE,
         'default' => 'none',
         'description' => 'Version of Drupal where the string was last used (for locales optimization).',
-      ),
-    ),
-    'primary key' => array('lid'),
-    'indexes' => array(
-      'source_context' => array(array('source', 30), 'context'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['lid'],
+    'indexes' => [
+      'source_context' => [['source', 30], 'context'],
+    ],
+  ];
 
-  $schema['locales_target'] = array(
+  $schema['locales_target'] = [
     'description' => 'Stores translated versions of strings.',
-    'fields' => array(
-      'lid' => array(
+    'fields' => [
+      'lid' => [
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'description' => 'Source string ID. References {locales_source}.lid.',
-      ),
-      'translation' => array(
+      ],
+      'translation' => [
         'type' => 'text',
         'mysql_type' => 'blob',
         'not null' => TRUE,
         'description' => 'Translation string value in this language.',
-      ),
-      'language' => array(
+      ],
+      'language' => [
         'type' => 'varchar_ascii',
         'length' => 12,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Language code. References {language}.langcode.',
-      ),
-      'customized' => array(
+      ],
+      'customized' => [
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0, // LOCALE_NOT_CUSTOMIZED
         'description' => 'Boolean indicating whether the translation is custom to this site.',
-      ),
-    ),
-    'primary key' => array('language', 'lid'),
-    'foreign keys' => array(
-      'locales_source' => array(
+      ],
+    ],
+    'primary key' => ['language', 'lid'],
+    'foreign keys' => [
+      'locales_source' => [
         'table' => 'locales_source',
-        'columns' => array('lid' => 'lid'),
-      ),
-    ),
-    'indexes' => array(
-      'lid' => array('lid'),
-    ),
-  );
+        'columns' => ['lid' => 'lid'],
+      ],
+    ],
+    'indexes' => [
+      'lid' => ['lid'],
+    ],
+  ];
 
-  $schema['locales_location'] = array(
+  $schema['locales_location'] = [
     'description' => 'Location information for source strings.',
-    'fields' => array(
-      'lid' => array(
+    'fields' => [
+      'lid' => [
         'type' => 'serial',
         'not null' => TRUE,
         'description' => 'Unique identifier of this location.',
-      ),
-      'sid' => array(
+      ],
+      'sid' => [
         'type' => 'int',
         'not null' => TRUE,
         'description' => 'Unique identifier of this string.',
-      ),
-      'type' => array(
+      ],
+      'type' => [
         'type' => 'varchar_ascii',
         'length' => 50,
         'not null' => TRUE,
         'default' => '',
         'description' => 'The location type (file, config, path, etc).',
-      ),
-      'name' => array(
+      ],
+      'name' => [
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Type dependent location information (file name, path, etc).',
-      ),
-      'version' => array(
+      ],
+      'version' => [
         'type' => 'varchar_ascii',
         'length' => 20,
         'not null' => TRUE,
         'default' => 'none',
         'description' => 'Version of Drupal where the location was found.',
-      ),
-    ),
-    'primary key' => array('lid'),
-    'foreign keys' => array(
-      'locales_source' => array(
+      ],
+    ],
+    'primary key' => ['lid'],
+    'foreign keys' => [
+      'locales_source' => [
         'table' => 'locales_source',
-        'columns' => array('sid' => 'lid'),
-      ),
-    ),
-    'indexes' => array(
-      'string_id' => array('sid'),
-      'string_type' => array('sid', 'type'),
-    ),
-  );
+        'columns' => ['sid' => 'lid'],
+      ],
+    ],
+    'indexes' => [
+      'string_id' => ['sid'],
+      'string_type' => ['sid', 'type'],
+    ],
+  ];
 
-  $schema['locale_file'] = array(
+  $schema['locale_file'] = [
     'description' => 'File import status information for interface translation files.',
-    'fields' => array(
-      'project' => array(
+    'fields' => [
+      'project' => [
         'type' => 'varchar_ascii',
         'length' => '255',
         'not null' => TRUE,
         'default' => '',
         'description' => 'A unique short name to identify the project the file belongs to.',
-      ),
-      'langcode' => array(
+      ],
+      'langcode' => [
         'type' => 'varchar_ascii',
         'length' => '12',
         'not null' => TRUE,
         'default' => '',
         'description' => 'Language code of this translation. References {language}.langcode.',
-      ),
-      'filename' => array(
+      ],
+      'filename' => [
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Filename of the imported file.',
-      ),
-      'version' => array(
+      ],
+      'version' => [
         'type' => 'varchar',
         'length' => '128',
         'not null' => TRUE,
         'default' => '',
         'description' => 'Version tag of the imported file.',
-      ),
-      'uri' => array(
+      ],
+      'uri' => [
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'URI of the remote file, the resulting local file or the locally imported file.',
-      ),
-      'timestamp' => array(
+      ],
+      'timestamp' => [
         'type' => 'int',
         'not null' => FALSE,
         'default' => 0,
         'description' => 'Unix timestamp of the imported file.',
-      ),
-      'last_checked' => array(
+      ],
+      'last_checked' => [
         'type' => 'int',
         'not null' => FALSE,
         'default' => 0,
         'description' => 'Unix timestamp of the last time this translation was confirmed to be the most recent release available.',
-      ),
-    ),
-    'primary key' => array('project', 'langcode'),
-  );
+      ],
+    ],
+    'primary key' => ['project', 'langcode'],
+  ];
   return $schema;
 }
 
@@ -235,10 +235,10 @@ function locale_schema() {
  * Implements hook_requirements().
  */
 function locale_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
   if ($phase == 'runtime') {
-    $available_updates = array();
-    $untranslated = array();
+    $available_updates = [];
+    $untranslated = [];
     $languages = locale_translatable_language_list();
 
     if ($languages) {
@@ -258,37 +258,37 @@ function locale_requirements($phase) {
 
         if ($available_updates || $untranslated) {
           if ($available_updates) {
-            $requirements['locale_translation'] = array(
+            $requirements['locale_translation'] = [
               'title' => 'Translation update status',
               'value' => \Drupal::l(t('Updates available'), new Url('locale.translate_status')),
               'severity' => REQUIREMENT_WARNING,
-              'description' => t('Updates available for: @languages. See the <a href=":updates">Available translation updates</a> page for more information.', array('@languages' => implode(', ', $available_updates), ':updates' => \Drupal::url('locale.translate_status'))),
-            );
+              'description' => t('Updates available for: @languages. See the <a href=":updates">Available translation updates</a> page for more information.', ['@languages' => implode(', ', $available_updates), ':updates' => \Drupal::url('locale.translate_status')]),
+            ];
           }
           else {
-            $requirements['locale_translation'] = array(
+            $requirements['locale_translation'] = [
               'title' => 'Translation update status',
               'value' => t('Missing translations'),
               'severity' => REQUIREMENT_INFO,
-              'description' => t('Missing translations for: @languages. See the <a href=":updates">Available translation updates</a> page for more information.', array('@languages' => implode(', ', $untranslated), ':updates' => \Drupal::url('locale.translate_status'))),
-            );
+              'description' => t('Missing translations for: @languages. See the <a href=":updates">Available translation updates</a> page for more information.', ['@languages' => implode(', ', $untranslated), ':updates' => \Drupal::url('locale.translate_status')]),
+            ];
           }
         }
         else {
-          $requirements['locale_translation'] = array(
+          $requirements['locale_translation'] = [
             'title' => 'Translation update status',
             'value' => t('Up to date'),
             'severity' => REQUIREMENT_OK,
-          );
+          ];
         }
       }
       else {
-        $requirements['locale_translation'] = array(
+        $requirements['locale_translation'] = [
           'title' => 'Translation update status',
           'value' => \Drupal::l(t('Can not determine status'), new Url('locale.translate_status')),
           'severity' => REQUIREMENT_WARNING,
-          'description' => t('No translation status is available. See the <a href=":updates">Available translation updates</a> page for more information.', array(':updates' => \Drupal::url('locale.translate_status'))),
-        );
+          'description' => t('No translation status is available. See the <a href=":updates">Available translation updates</a> page for more information.', [':updates' => \Drupal::url('locale.translate_status')]),
+        ];
       }
     }
   }
diff --git a/core/modules/locale/locale.module b/core/modules/locale/locale.module
index 5b59faaa7066e1e3dcb8de8090c79bae79c6c19b..b1298e4b679eaa3751198630a1e99c4780cf2617 100644
--- a/core/modules/locale/locale.module
+++ b/core/modules/locale/locale.module
@@ -146,30 +146,30 @@ function locale_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.locale':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Interface Translation module allows you to translate interface text (<em>strings</em>) into different languages, and to switch between them for the display of interface text. It uses the functionality provided by the <a href=":language">Language module</a>. For more information, see the <a href=":doc-url">online documentation for the Interface Translation module</a>.', array(':doc-url' => 'https://www.drupal.org/documentation/modules/locale/', ':language' => \Drupal::url('help.page', array('name' => 'language')))) . '</p>';
+      $output .= '<p>' . t('The Interface Translation module allows you to translate interface text (<em>strings</em>) into different languages, and to switch between them for the display of interface text. It uses the functionality provided by the <a href=":language">Language module</a>. For more information, see the <a href=":doc-url">online documentation for the Interface Translation module</a>.', [':doc-url' => 'https://www.drupal.org/documentation/modules/locale/', ':language' => \Drupal::url('help.page', ['name' => 'language'])]) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Importing translation files') . '</dt>';
-      $output .= '<dd>' . t('Translation files with translated interface text are imported automatically when languages are added on the <a href=":languages">Languages</a> page, or when modules or themes are enabled. On the <a href=":locale-settings">Interface translation settings</a> page, the <em>Translation source</em> can be restricted to local files only, or to include the <a href=":server">Drupal translation server</a>. Although modules and themes may not be fully translated in all languages, new translations become available frequently. You can specify whether and how often to check for translation file updates and whether to overwrite existing translations on the <a href=":locale-settings">Interface translation settings</a> page. You can also manually import a translation file on the <a href=":import">Interface translation import</a> page.', array(':import' => \Drupal::url('locale.translate_import'), ':locale-settings' => \Drupal::url('locale.settings'), ':languages' => \Drupal::url('entity.configurable_language.collection'), ':server' => 'https://localize.drupal.org')) . '</dd>';
+      $output .= '<dd>' . t('Translation files with translated interface text are imported automatically when languages are added on the <a href=":languages">Languages</a> page, or when modules or themes are enabled. On the <a href=":locale-settings">Interface translation settings</a> page, the <em>Translation source</em> can be restricted to local files only, or to include the <a href=":server">Drupal translation server</a>. Although modules and themes may not be fully translated in all languages, new translations become available frequently. You can specify whether and how often to check for translation file updates and whether to overwrite existing translations on the <a href=":locale-settings">Interface translation settings</a> page. You can also manually import a translation file on the <a href=":import">Interface translation import</a> page.', [':import' => \Drupal::url('locale.translate_import'), ':locale-settings' => \Drupal::url('locale.settings'), ':languages' => \Drupal::url('entity.configurable_language.collection'), ':server' => 'https://localize.drupal.org']) . '</dd>';
       $output .= '<dt>' . t('Checking the translation status') . '</dt>';
-      $output .= '<dd>' . t('You can check how much of the interface on your site is translated into which language on the <a href=":languages">Languages</a> page. On the <a href=":translation-updates">Available translation updates</a> page, you can check whether interface translation updates are available on the <a href=":server">Drupal translation server</a>.', array(':languages' => \Drupal::url('entity.configurable_language.collection'), ':translation-updates' => \Drupal::url('locale.translate_status'), ':server' => 'https://localize.drupal.org')) . '<dd>';
+      $output .= '<dd>' . t('You can check how much of the interface on your site is translated into which language on the <a href=":languages">Languages</a> page. On the <a href=":translation-updates">Available translation updates</a> page, you can check whether interface translation updates are available on the <a href=":server">Drupal translation server</a>.', [':languages' => \Drupal::url('entity.configurable_language.collection'), ':translation-updates' => \Drupal::url('locale.translate_status'), ':server' => 'https://localize.drupal.org']) . '<dd>';
       $output .= '<dt>' . t('Translating individual strings') . '</dt>';
-      $output .= '<dd>' . t('You can translate individual strings directly on the <a href=":translate">User interface translation</a> page, or download the currently-used translation file for a specific language on the <a href=":export">Interface translation export</a> page. Once you have edited the translation file, you can then import it again on the <a href=":import">Interface translation import</a> page.', array(':translate' => \Drupal::url('locale.translate_page'), ':export' => \Drupal::url('locale.translate_export'), ':import' => \Drupal::url('locale.translate_import'))) . '</dd>';
+      $output .= '<dd>' . t('You can translate individual strings directly on the <a href=":translate">User interface translation</a> page, or download the currently-used translation file for a specific language on the <a href=":export">Interface translation export</a> page. Once you have edited the translation file, you can then import it again on the <a href=":import">Interface translation import</a> page.', [':translate' => \Drupal::url('locale.translate_page'), ':export' => \Drupal::url('locale.translate_export'), ':import' => \Drupal::url('locale.translate_import')]) . '</dd>';
       $output .= '<dt>' . t('Overriding default English strings') . '</dt>';
-      $output .= '<dd>' . t('If translation is enabled for English, you can <em>override</em> the default English interface text strings in your site with other English text strings on the <a href=":translate">User interface translation</a> page. Translation is off by default for English, but you can turn it on by visiting the <em>Edit language</em> page for <em>English</em> from the <a href=":languages">Languages</a> page.', array(':translate' => \Drupal::url('locale.translate_page'), ':languages' => \Drupal::url('entity.configurable_language.collection'))) . '</dd>';
+      $output .= '<dd>' . t('If translation is enabled for English, you can <em>override</em> the default English interface text strings in your site with other English text strings on the <a href=":translate">User interface translation</a> page. Translation is off by default for English, but you can turn it on by visiting the <em>Edit language</em> page for <em>English</em> from the <a href=":languages">Languages</a> page.', [':translate' => \Drupal::url('locale.translate_page'), ':languages' => \Drupal::url('entity.configurable_language.collection')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
     case 'entity.configurable_language.collection':
-      return '<p>' . t('Interface translations are automatically imported when a language is added, or when new modules or themes are enabled. The report <a href=":update">Available translation updates</a> shows the status. Interface text can be customized in the <a href=":translate">user interface translation</a> page.', array(':update' => \Drupal::url('locale.translate_status'), ':translate' => \Drupal::url('locale.translate_page'))) . '</p>';
+      return '<p>' . t('Interface translations are automatically imported when a language is added, or when new modules or themes are enabled. The report <a href=":update">Available translation updates</a> shows the status. Interface text can be customized in the <a href=":translate">user interface translation</a> page.', [':update' => \Drupal::url('locale.translate_status'), ':translate' => \Drupal::url('locale.translate_page')]) . '</p>';
 
     case 'locale.translate_page':
-      $output = '<p>' . t('This page allows a translator to search for specific translated and untranslated strings, and is used when creating or editing translations. (Note: Because translation tasks involve many strings, it may be more convenient to <a title="User interface translation export" href=":export">export</a> strings for offline editing in a desktop Gettext translation editor.) Searches may be limited to strings in a specific language.', array(':export' => \Drupal::url('locale.translate_export'))) . '</p>';
+      $output = '<p>' . t('This page allows a translator to search for specific translated and untranslated strings, and is used when creating or editing translations. (Note: Because translation tasks involve many strings, it may be more convenient to <a title="User interface translation export" href=":export">export</a> strings for offline editing in a desktop Gettext translation editor.) Searches may be limited to strings in a specific language.', [':export' => \Drupal::url('locale.translate_export')]) . '</p>';
       return $output;
 
     case 'locale.translate_import':
-      $output = '<p>' . t('Translation files are automatically downloaded and imported when <a title="Languages" href=":language">languages</a> are added, or when modules or themes are enabled.', array(':language' => \Drupal::url('entity.configurable_language.collection'))) . '</p>';
-      $output .= '<p>' . t('This page allows translators to manually import translated strings contained in a Gettext Portable Object (.po) file. Manual import may be used for customized translations or for the translation of custom modules and themes. To customize translations you can download a translation file from the <a href=":url">Drupal translation server</a> or <a title="User interface translation export" href=":export">export</a> translations from the site, customize the translations using a Gettext translation editor, and import the result using this page.', array(':url' => 'https://localize.drupal.org', ':export' => \Drupal::url('locale.translate_export'))) . '</p>';
+      $output = '<p>' . t('Translation files are automatically downloaded and imported when <a title="Languages" href=":language">languages</a> are added, or when modules or themes are enabled.', [':language' => \Drupal::url('entity.configurable_language.collection')]) . '</p>';
+      $output .= '<p>' . t('This page allows translators to manually import translated strings contained in a Gettext Portable Object (.po) file. Manual import may be used for customized translations or for the translation of custom modules and themes. To customize translations you can download a translation file from the <a href=":url">Drupal translation server</a> or <a title="User interface translation export" href=":export">export</a> translations from the site, customize the translations using a Gettext translation editor, and import the result using this page.', [':url' => 'https://localize.drupal.org', ':export' => \Drupal::url('locale.translate_export')]) . '</p>';
       $output .= '<p>' . t('Note that importing large .po files may take several minutes.') . '</p>';
       return $output;
 
@@ -182,16 +182,16 @@ function locale_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function locale_theme() {
-  return array(
-    'locale_translation_last_check' => array(
-      'variables' => array('last' => NULL),
+  return [
+    'locale_translation_last_check' => [
+      'variables' => ['last' => NULL],
       'file' => 'locale.pages.inc',
-    ),
-    'locale_translation_update_info' => array(
-      'variables' => array('updates' => array(), 'not_found' => array()),
+    ],
+    'locale_translation_update_info' => [
+      'variables' => ['updates' => [], 'not_found' => []],
       'file' => 'locale.pages.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -223,11 +223,11 @@ function locale_configurable_language_update(ConfigurableLanguageInterface $lang
  */
 function locale_configurable_language_delete(ConfigurableLanguageInterface $language) {
   // Remove translations.
-  \Drupal::service('locale.storage')->deleteTranslations(array('language' => $language->id()));
+  \Drupal::service('locale.storage')->deleteTranslations(['language' => $language->id()]);
 
   // Remove interface translation files.
   module_load_include('inc', 'locale', 'locale.bulk');
-  locale_translate_delete_translation_files(array(), array($language->id()));
+  locale_translate_delete_translation_files([], [$language->id()]);
 
   // Remove translated configuration objects.
   Locale::config()->deleteLanguageTranslations($language->id());
@@ -237,7 +237,7 @@ function locale_configurable_language_delete(ConfigurableLanguageInterface $lang
   \Drupal::cache('render')->deleteAll();
 
   // Clear locale translation caches.
-  locale_translation_status_delete_languages(array($language->id()));
+  locale_translation_status_delete_languages([$language->id()]);
   \Drupal::cache()->delete('locale:' . $language->id());
 }
 
@@ -277,7 +277,7 @@ function locale_get_plural($count, $langcode = NULL) {
 
   // Used to store precomputed plural indexes corresponding to numbers
   // individually for each language.
-  $plural_indexes = &drupal_static(__FUNCTION__ . ':plurals', array());
+  $plural_indexes = &drupal_static(__FUNCTION__ . ':plurals', []);
 
   $langcode = $langcode ? $langcode : $language_interface->getId();
 
@@ -323,7 +323,7 @@ function locale_modules_installed($modules) {
  * Implements hook_module_preuninstall().
  */
 function locale_module_preuninstall($module) {
-  $components['module'] = array($module);
+  $components['module'] = [$module];
   locale_system_remove($components);
 }
 
@@ -399,7 +399,7 @@ function locale_system_set_config_langcodes() {
  *   translations for, indexed by type.
  */
 function locale_system_update(array $components) {
-  $components += array('module' => array(), 'theme' => array());
+  $components += ['module' => [], 'theme' => []];
   $list = array_merge($components['module'], $components['theme']);
 
   // Skip running the translation imports if in the installer,
@@ -446,7 +446,7 @@ function locale_system_update(array $components) {
  *   translations for, indexed by type.
  */
 function locale_system_remove($components) {
-  $components += array('module' => array(), 'theme' => array());
+  $components += ['module' => [], 'theme' => []];
   $list = array_merge($components['module'], $components['theme']);
   if ($language_list = locale_translatable_language_list()) {
     module_load_include('compare.inc', 'locale');
@@ -460,7 +460,7 @@ function locale_system_remove($components) {
       locale_translation_file_history_delete($list);
 
       // Remove translation files.
-      locale_translate_delete_translation_files($list, array());
+      locale_translate_delete_translation_files($list, []);
 
       // Remove translatable projects.
       // Follow-up issue https://www.drupal.org/node/1842362 to replace the
@@ -486,7 +486,7 @@ function locale_cache_flush() {
  */
 function locale_js_alter(&$javascript, AttachedAssetsInterface $assets) {
   // @todo Remove this in https://www.drupal.org/node/2421323.
-  $files = array();
+  $files = [];
   foreach ($javascript as $item) {
     if (isset($item['type']) && $item['type'] == 'file') {
       // Ignore the JS translation placeholder file.
@@ -529,11 +529,11 @@ function locale_js_alter(&$javascript, AttachedAssetsInterface $assets) {
  *   The filepath to the translation file or NULL if no translation is
  *   applicable.
  */
-function locale_js_translate(array $files = array()) {
+function locale_js_translate(array $files = []) {
   $language_interface = \Drupal::languageManager()->getCurrentLanguage();
 
   $dir = 'public://' . \Drupal::config('locale.settings')->get('javascript.directory');
-  $parsed = \Drupal::state()->get('system.javascript_parsed') ?: array();
+  $parsed = \Drupal::state()->get('system.javascript_parsed') ?: [];
   $new_files = FALSE;
 
   foreach ($files as $filepath) {
@@ -571,7 +571,7 @@ function locale_js_translate(array $files = array()) {
   }
 
   // Add the translation JavaScript file to the page.
-  $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: array();
+  $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: [];
   $translation_file = NULL;
   if (!empty($files) && !empty($locale_javascripts[$language_interface->getId()])) {
     // Add the translation JavaScript file to the page.
@@ -624,7 +624,7 @@ function locale_form_language_admin_overview_form_alter(&$form, FormStateInterfa
   $languages = $form['languages']['#languages'];
 
   $total_strings = \Drupal::service('locale.storage')->countStrings();
-  $stats = array_fill_keys(array_keys($languages), array());
+  $stats = array_fill_keys(array_keys($languages), []);
 
   // If we have source strings, count translations and calculate progress.
   if (!empty($total_strings)) {
@@ -640,26 +640,26 @@ function locale_form_language_admin_overview_form_alter(&$form, FormStateInterfa
   array_splice($form['languages']['#header'], -1, 0, ['translation-interface' => t('Interface translation')]);
 
   foreach ($languages as $langcode => $language) {
-    $stats[$langcode] += array(
+    $stats[$langcode] += [
       'translated' => 0,
       'ratio' => 0,
-    );
+    ];
     if (!$language->isLocked() && locale_is_translatable($langcode)) {
-      $form['languages'][$langcode]['locale_statistics'] = array(
+      $form['languages'][$langcode]['locale_statistics'] = [
         '#markup' => \Drupal::l(
-          t('@translated/@total (@ratio%)', array(
+          t('@translated/@total (@ratio%)', [
             '@translated' => $stats[$langcode]['translated'],
             '@total' => $total_strings,
             '@ratio' => $stats[$langcode]['ratio'],
-          )),
-          new Url('locale.translate_page', array(), array('query' => array('langcode' => $langcode)))
+          ]),
+          new Url('locale.translate_page', [], ['query' => ['langcode' => $langcode]])
         ),
-      );
+      ];
     }
     else {
-      $form['languages'][$langcode]['locale_statistics'] = array(
+      $form['languages'][$langcode]['locale_statistics'] = [
         '#markup' => t('not applicable'),
-      );
+      ];
     }
     // #type = link doesn't work with #weight on table.
     // reset and set it back after locale_statistics to get it at the right end.
@@ -695,7 +695,7 @@ function locale_form_language_admin_add_form_alter_submit($form, FormStateInterf
 
   if (\Drupal::config('locale.settings')->get('translation.import_enabled')) {
     // Download and import translations for the newly added language.
-    $batch = locale_translation_batch_update_build(array(), array($langcode), $options);
+    $batch = locale_translation_batch_update_build([], [$langcode], $options);
     batch_set($batch);
   }
 
@@ -704,7 +704,7 @@ function locale_form_language_admin_add_form_alter_submit($form, FormStateInterf
   // because then we extract English sources from shipped configuration.
   if (\Drupal::config('locale.settings')->get('translation.import_enabled') || $langcode == 'en') {
     \Drupal::moduleHandler()->loadInclude('locale', 'bulk.inc');
-    if ($batch = locale_config_batch_update_components($options, array($langcode))) {
+    if ($batch = locale_config_batch_update_components($options, [$langcode])) {
       batch_set($batch);
     }
   }
@@ -715,11 +715,11 @@ function locale_form_language_admin_add_form_alter_submit($form, FormStateInterf
  */
 function locale_form_language_admin_edit_form_alter(&$form, FormStateInterface $form_state) {
   if ($form['langcode']['#type'] == 'value' && $form['langcode']['#value'] == 'en') {
-    $form['locale_translate_english'] = array(
+    $form['locale_translate_english'] = [
       '#title' => t('Enable interface translation to English'),
       '#type' => 'checkbox',
       '#default_value' => \Drupal::configFactory()->getEditable('locale.settings')->get('translate_english'),
-    );
+    ];
     $form['actions']['submit']['#submit'][] = 'locale_form_language_admin_edit_form_alter_submit';
   }
 }
@@ -750,16 +750,16 @@ function locale_is_translatable($langcode) {
  * Add interface translation directory setting to directories configuration.
  */
 function locale_form_system_file_system_settings_alter(&$form, FormStateInterface $form_state) {
-  $form['translation_path'] = array(
+  $form['translation_path'] = [
     '#type' => 'textfield',
     '#title' => t('Interface translations directory'),
     '#default_value' => \Drupal::configFactory()->getEditable('locale.settings')->get('translation.path'),
     '#maxlength' => 255,
     '#description' => t('A local file system path where interface translation files will be stored.'),
     '#required' => TRUE,
-    '#after_build' => array('system_check_directory'),
+    '#after_build' => ['system_check_directory'],
     '#weight' => 10,
-  );
+  ];
   if ($form['file_default_scheme']) {
     $form['file_default_scheme']['#weight'] = 20;
   }
@@ -814,7 +814,7 @@ function locale_preprocess_node(&$variables) {
  *   Array of translation file objects.
  */
 function locale_translation_get_file_history() {
-  $history = &drupal_static(__FUNCTION__, array());
+  $history = &drupal_static(__FUNCTION__, []);
 
   if (empty($history)) {
     // Get file history from the database.
@@ -838,15 +838,15 @@ function locale_translation_get_file_history() {
  */
 function locale_translation_update_file_history($file) {
   $status = db_merge('locale_file')
-    ->key(array(
+    ->key([
       'project' => $file->project,
       'langcode' => $file->langcode,
-    ))
-    ->fields(array(
+    ])
+    ->fields([
       'version' => $file->version,
       'timestamp' => $file->timestamp,
       'last_checked' => $file->last_checked,
-    ))
+    ])
     ->execute();
   // The file history has changed, flush the static cache now.
   // @todo Can we make this more fine grained?
@@ -863,7 +863,7 @@ function locale_translation_update_file_history($file) {
  * @param array $langcodes
  *   Language code(s) to be deleted from the file history.
  */
-function locale_translation_file_history_delete($projects = array(), $langcodes = array()) {
+function locale_translation_file_history_delete($projects = [], $langcodes = []) {
   $query = db_delete('locale_file');
   if (!empty($projects)) {
     $query->condition('project', $projects, 'IN');
@@ -880,7 +880,7 @@ function locale_translation_file_history_delete($projects = array(), $langcodes
  * @todo What is 'translation status'?
  */
 function locale_translation_get_status($projects = NULL, $langcodes = NULL) {
-  $result = array();
+  $result = [];
   $status = \Drupal::keyValue('locale.translation_status')->getAll();
   module_load_include('translation.inc', 'locale');
   $projects = $projects ? $projects : array_keys(locale_translation_get_projects());
@@ -894,7 +894,7 @@ function locale_translation_get_status($projects = NULL, $langcodes = NULL) {
         $result[$project][$langcode] = $status[$project][$langcode];
       }
       else {
-        $sources = locale_translation_build_sources(array($project), array($langcode));
+        $sources = locale_translation_build_sources([$project], [$langcode]);
         if (isset($sources[$project][$langcode])) {
           $result[$project][$langcode] = $sources[$project][$langcode];
         }
@@ -921,7 +921,7 @@ function locale_translation_status_save($project, $langcode, $type, $data) {
   module_load_include('translation.inc', 'locale');
   $status = locale_translation_get_status();
   if (empty($status)) {
-    $projects = locale_translation_get_projects(array($project));
+    $projects = locale_translation_get_projects([$project]);
     if (isset($projects[$project])) {
       $status[$project][$langcode] = locale_translation_source_build($projects[$project], $langcode);
     }
@@ -1049,7 +1049,7 @@ function locale_string_is_safe($string) {
   //   string. https://www.drupal.org/node/2372127
   $string = preg_replace('/\[[a-z0-9_-]+(:[a-z0-9_-]+)+\]/i', '', $string);
 
-  return Html::decodeEntities($string) == Html::decodeEntities(Xss::filter($string, array('a', 'abbr', 'acronym', 'address', 'b', 'bdo', 'big', 'blockquote', 'br', 'caption', 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'dl', 'dt', 'em', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'ins', 'kbd', 'li', 'ol', 'p', 'pre', 'q', 'samp', 'small', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'ul', 'var')));
+  return Html::decodeEntities($string) == Html::decodeEntities(Xss::filter($string, ['a', 'abbr', 'acronym', 'address', 'b', 'bdo', 'big', 'blockquote', 'br', 'caption', 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'dl', 'dt', 'em', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'ins', 'kbd', 'li', 'ol', 'p', 'pre', 'q', 'samp', 'small', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'ul', 'var']));
 }
 
 /**
@@ -1066,11 +1066,11 @@ function locale_string_is_safe($string) {
  *   (optional) List of string identifiers that have been updated / created.
  *   If not provided, all caches for the affected languages are cleared.
  */
-function _locale_refresh_translations($langcodes, $lids = array()) {
+function _locale_refresh_translations($langcodes, $lids = []) {
   if (!empty($langcodes)) {
     // Update javascript translations if any of the strings has a javascript
     // location, or if no string ids were provided, update all languages.
-    if (empty($lids) || ($strings = \Drupal::service('locale.storage')->getStrings(array('lid' => $lids, 'type' => 'javascript')))) {
+    if (empty($lids) || ($strings = \Drupal::service('locale.storage')->getStrings(['lid' => $lids, 'type' => 'javascript']))) {
       array_map('_locale_invalidate_js', $langcodes);
     }
   }
@@ -1175,22 +1175,22 @@ function _locale_parse_js_file($filepath) {
     [,\)]
     ~sx', $file, $plural_matches);
 
-  $matches = array();
+  $matches = [];
 
   // Add strings from Drupal.t().
   foreach ($t_matches[1] as $key => $string) {
-    $matches[] = array(
+    $matches[] = [
       'source'  => _locale_strip_quotes($string),
       'context' => _locale_strip_quotes($t_matches[2][$key]),
-    );
+    ];
   }
 
   // Add string from Drupal.formatPlural().
   foreach ($plural_matches[1] as $key => $string) {
-    $matches[] = array(
+    $matches[] = [
       'source'  => _locale_strip_quotes($string) . LOCALE_PLURAL_DELIMITER . _locale_strip_quotes($plural_matches[2][$key]),
       'context' => _locale_strip_quotes($plural_matches[3][$key]),
-    );
+    ];
   }
 
   // Loop through all matches and process them.
@@ -1224,7 +1224,7 @@ function _locale_parse_js_file($filepath) {
  *   New content of the 'system.javascript_parsed' variable.
  */
 function _locale_invalidate_js($langcode = NULL) {
-  $parsed = \Drupal::state()->get('system.javascript_parsed') ?: array();
+  $parsed = \Drupal::state()->get('system.javascript_parsed') ?: [];
 
   if (empty($langcode)) {
     // Invalidate all languages.
@@ -1264,12 +1264,12 @@ function _locale_rebuild_js($langcode = NULL) {
 
   // Construct the array for JavaScript translations.
   // Only add strings with a translation to the translations array.
-  $conditions = array(
+  $conditions = [
     'type' => 'javascript',
     'language' => $language->getId(),
     'translated' => TRUE,
-  );
-  $translations = array();
+  ];
+  $translations = [];
   foreach (\Drupal::service('locale.storage')->getTranslations($conditions) as $data) {
     $translations[$data->context][$data->source] = $data->translation;
   }
@@ -1278,9 +1278,9 @@ function _locale_rebuild_js($langcode = NULL) {
   $data_hash = NULL;
   $data = $status = '';
   if (!empty($translations)) {
-    $data = array(
+    $data = [
       'strings' => $translations,
-    );
+    ];
 
     $locale_plurals = \Drupal::service('locale.plural.formula')->getFormula($language->getId());
     if ($locale_plurals) {
@@ -1297,7 +1297,7 @@ function _locale_rebuild_js($langcode = NULL) {
 
   // Delete old file, if we have no translations anymore, or a different file to
   // be saved.
-  $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: array();
+  $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: [];
   $changed_hash = !isset($locale_javascripts[$language->getId()]) || ($locale_javascripts[$language->getId()] != $data_hash);
   if (!empty($locale_javascripts[$language->getId()]) && (!$data || $changed_hash)) {
     file_unmanaged_delete($dir . '/' . $language->getId() . '_' . $locale_javascripts[$language->getId()] . '.js');
@@ -1348,24 +1348,24 @@ function _locale_rebuild_js($langcode = NULL) {
   $logger = \Drupal::logger('locale');
   switch ($status) {
     case 'updated':
-      $logger->notice('Updated JavaScript translation file for the language %language.', array('%language' => $language->getName()));
+      $logger->notice('Updated JavaScript translation file for the language %language.', ['%language' => $language->getName()]);
       return TRUE;
 
     case 'rebuilt':
-      $logger->warning('JavaScript translation file %file.js was lost.', array('%file' => $locale_javascripts[$language->getId()]));
+      $logger->warning('JavaScript translation file %file.js was lost.', ['%file' => $locale_javascripts[$language->getId()]]);
       // Proceed to the 'created' case as the JavaScript translation file has
       // been created again.
 
     case 'created':
-      $logger->notice('Created JavaScript translation file for the language %language.', array('%language' => $language->getName()));
+      $logger->notice('Created JavaScript translation file for the language %language.', ['%language' => $language->getName()]);
       return TRUE;
 
     case 'deleted':
-      $logger->notice('Removed JavaScript translation file for the language %language because no translations currently exist for that language.', array('%language' => $language->getName()));
+      $logger->notice('Removed JavaScript translation file for the language %language because no translations currently exist for that language.', ['%language' => $language->getName()]);
       return TRUE;
 
     case 'error':
-      $logger->error('An error occurred during creation of the JavaScript translation file for the language %language.', array('%language' => $language->getName()));
+      $logger->error('An error occurred during creation of the JavaScript translation file for the language %language.', ['%language' => $language->getName()]);
       return FALSE;
 
     default:
@@ -1383,7 +1383,7 @@ function locale_translation_language_table($form_element) {
   // Remove checkboxes of languages without updates.
   if ($form_element['#not_found']) {
     foreach ($form_element['#not_found'] as $langcode) {
-      $form_element[$langcode] = array();
+      $form_element[$langcode] = [];
     }
   }
   return $form_element;
diff --git a/core/modules/locale/locale.pages.inc b/core/modules/locale/locale.pages.inc
index 9b2be235fece856f7accf4d43ef70df70eeb4f4b..d8d7659bf9ca8859e22a1abf7707df89b2a7f936 100644
--- a/core/modules/locale/locale.pages.inc
+++ b/core/modules/locale/locale.pages.inc
@@ -29,7 +29,7 @@ function locale_translation_manual_status() {
   if (batch_get()) {
     return batch_process('admin/reports/translations');
   }
-  return new RedirectResponse(\Drupal::url('locale.translate_status', array(), array('absolute' => TRUE)));
+  return new RedirectResponse(\Drupal::url('locale.translate_status', [], ['absolute' => TRUE]));
 }
 
 /**
@@ -72,5 +72,5 @@ function template_preprocess_locale_translation_last_check(array &$variables) {
   $last = $variables['last'];
   $variables['last_checked'] = ($last != NULL);
   $variables['time'] = \Drupal::service('date.formatter')->formatTimeDiffSince($last);
-  $variables['link'] = \Drupal::l(t('Check manually'), new Url('locale.check_translation', array(), array('query' => \Drupal::destination()->getAsArray())));
+  $variables['link'] = \Drupal::l(t('Check manually'), new Url('locale.check_translation', [], ['query' => \Drupal::destination()->getAsArray()]));
 }
diff --git a/core/modules/locale/locale.translation.inc b/core/modules/locale/locale.translation.inc
index 0383aafd22b87011ed8a9d4d52a4338265baee2f..571f7d2247fee686e7de5d11c03008a62b20c426 100644
--- a/core/modules/locale/locale.translation.inc
+++ b/core/modules/locale/locale.translation.inc
@@ -52,8 +52,8 @@
  *
  * @see locale_translation_build_projects()
  */
-function locale_translation_get_projects(array $project_names = array()) {
-  $projects = &drupal_static(__FUNCTION__, array());
+function locale_translation_get_projects(array $project_names = []) {
+  $projects = &drupal_static(__FUNCTION__, []);
 
   if (empty($projects)) {
     // Get project data from the database.
@@ -100,7 +100,7 @@ function locale_translation_clear_cache_projects() {
  * @see locale_translation_source_build()
  */
 function locale_translation_load_sources(array $projects = NULL, array $langcodes = NULL) {
-  $sources = array();
+  $sources = [];
   $projects = $projects ? $projects : array_keys(locale_translation_get_projects());
   $langcodes = $langcodes ? $langcodes : array_keys(locale_translatable_language_list());
 
@@ -129,8 +129,8 @@ function locale_translation_load_sources(array $projects = NULL, array $langcode
  *
  * @see locale_translation_source_build()
  */
-function locale_translation_build_sources(array $projects = array(), array $langcodes = array()) {
-  $sources = array();
+function locale_translation_build_sources(array $projects = [], array $langcodes = []) {
+  $sources = [];
   $projects = locale_translation_get_projects($projects);
   $langcodes = $langcodes ? $langcodes : array_keys(locale_translatable_language_list());
 
@@ -173,7 +173,7 @@ function locale_translation_source_check_file($source) {
     $directory = $source_file->directory;
     $filename = '/' . preg_quote($source_file->filename) . '$/';
 
-    if ($files = file_scan_directory($directory, $filename, array('key' => 'name', 'recurse' => FALSE))) {
+    if ($files = file_scan_directory($directory, $filename, ['key' => 'name', 'recurse' => FALSE])) {
       $file = current($files);
       $source_file->uri = $file->uri;
       $source_file->timestamp = filemtime($file->uri);
@@ -244,35 +244,35 @@ function locale_translation_source_build($project, $langcode, $filename = NULL)
   // remote file. The local version of this file will only be checked if a
   // translations directory has been defined. If the server_pattern is a local
   // file path we will only check for a file in the local file system.
-  $files = array();
+  $files = [];
   if (_locale_translation_file_is_remote($source->server_pattern)) {
-    $files[LOCALE_TRANSLATION_REMOTE] = (object) array(
+    $files[LOCALE_TRANSLATION_REMOTE] = (object) [
       'project' => $project->name,
       'langcode' => $langcode,
       'version' => $project->version,
       'type' => LOCALE_TRANSLATION_REMOTE,
       'filename' => locale_translation_build_server_pattern($source, basename($source->server_pattern)),
       'uri' => locale_translation_build_server_pattern($source, $source->server_pattern),
-    );
-    $files[LOCALE_TRANSLATION_LOCAL] = (object) array(
+    ];
+    $files[LOCALE_TRANSLATION_LOCAL] = (object) [
       'project' => $project->name,
       'langcode' => $langcode,
       'version' => $project->version,
       'type' => LOCALE_TRANSLATION_LOCAL,
       'filename' => locale_translation_build_server_pattern($source, $filename),
       'directory' => 'translations://',
-    );
+    ];
     $files[LOCALE_TRANSLATION_LOCAL]->uri = $files[LOCALE_TRANSLATION_LOCAL]->directory . $files[LOCALE_TRANSLATION_LOCAL]->filename;
   }
   else {
-    $files[LOCALE_TRANSLATION_LOCAL] = (object) array(
+    $files[LOCALE_TRANSLATION_LOCAL] = (object) [
       'project' => $project->name,
       'langcode' => $langcode,
       'version' => $project->version,
       'type' => LOCALE_TRANSLATION_LOCAL,
       'filename' => locale_translation_build_server_pattern($source, basename($source->server_pattern)),
       'directory' => locale_translation_build_server_pattern($source, drupal_dirname($source->server_pattern)),
-    );
+    ];
     $files[LOCALE_TRANSLATION_LOCAL]->uri = $files[LOCALE_TRANSLATION_LOCAL]->directory . '/' . $files[LOCALE_TRANSLATION_LOCAL]->filename;
   }
   $source->files = $files;
@@ -310,12 +310,12 @@ function locale_translation_source_build($project, $langcode, $filename = NULL)
  *   String with replaced placeholders.
  */
 function locale_translation_build_server_pattern($project, $template) {
-  $variables = array(
+  $variables = [
     '%project' => $project->name,
     '%version' => $project->version,
     '%core' => $project->core,
     '%language' => isset($project->langcode) ? $project->langcode : '%language',
-  );
+  ];
   return strtr($template, $variables);
 }
 
@@ -323,7 +323,7 @@ function locale_translation_build_server_pattern($project, $template) {
  * Populate a queue with project to check for translation updates.
  */
 function locale_cron_fill_queue() {
-  $updates = array();
+  $updates = [];
   $config = \Drupal::config('locale.settings');
 
   // Determine which project+language should be updated.
@@ -335,7 +335,7 @@ function locale_cron_fill_queue() {
   $files = db_select('locale_file', 'f')
     ->condition('f.project', array_keys($projects), 'IN')
     ->condition('f.last_checked', $last, '<')
-    ->fields('f', array('project', 'langcode'))
+    ->fields('f', ['project', 'langcode'])
     ->execute()->fetchAll();
   foreach ($files as $file) {
     $updates[$file->project][] = $file->langcode;
@@ -343,7 +343,7 @@ function locale_cron_fill_queue() {
     // Update the last_checked timestamp of the project+language that will
     // be checked for updates.
     db_update('locale_file')
-      ->fields(array('last_checked' => REQUEST_TIME))
+      ->fields(['last_checked' => REQUEST_TIME])
       ->condition('project', $file->project)
       ->condition('langcode', $file->langcode)
       ->execute();
@@ -357,7 +357,7 @@ function locale_cron_fill_queue() {
     $queue = \Drupal::queue('locale_translation', TRUE);
 
     foreach ($updates as $project => $languages) {
-      $batch = locale_translation_batch_update_build(array($project), $languages, $options);
+      $batch = locale_translation_batch_update_build([$project], $languages, $options);
       foreach ($batch['operations'] as $item) {
         $queue->createItem($item);
       }
@@ -429,13 +429,13 @@ function _locale_translation_source_compare($source1, $source2) {
  */
 function _locale_translation_default_update_options() {
   $config = \Drupal::config('locale.settings');
-  return array(
+  return [
     'customized' => LOCALE_NOT_CUSTOMIZED,
-    'overwrite_options' => array(
+    'overwrite_options' => [
       'not_customized' => $config->get('translation.overwrite_not_customized'),
       'customized' => $config->get('translation.overwrite_customized'),
-    ),
+    ],
     'finish_feedback' => TRUE,
     'use_remote' => locale_translation_use_remote_source(),
-  );
+  ];
 }
diff --git a/core/modules/locale/src/Controller/LocaleController.php b/core/modules/locale/src/Controller/LocaleController.php
index 88cc6bd56fb350721bd7f7e692973b482aeef5d5..2617c61cffecfb6bfcc73be20838d07d7fea8818 100644
--- a/core/modules/locale/src/Controller/LocaleController.php
+++ b/core/modules/locale/src/Controller/LocaleController.php
@@ -42,10 +42,10 @@ public function checkTranslation() {
    *   The render array for the string search screen.
    */
   public function translatePage() {
-    return array(
+    return [
       'filter' => $this->formBuilder()->getForm('Drupal\locale\Form\TranslateFilterForm'),
       'form' => $this->formBuilder()->getForm('Drupal\locale\Form\TranslateEditForm'),
-    );
+    ];
   }
 
 }
diff --git a/core/modules/locale/src/Form/ExportForm.php b/core/modules/locale/src/Form/ExportForm.php
index 47a3aeab129b034ca623af26eed1a026362dbc54..7c6f9321dc7c108c883811f1162b78dcd4a4bbde 100644
--- a/core/modules/locale/src/Form/ExportForm.php
+++ b/core/modules/locale/src/Form/ExportForm.php
@@ -66,7 +66,7 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $languages = $this->languageManager->getLanguages();
-    $language_options = array();
+    $language_options = [];
     foreach ($languages as $langcode => $language) {
       if (locale_is_translatable($langcode)) {
         $language_options[$langcode] = $language->getName();
@@ -75,59 +75,59 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $language_default = $this->languageManager->getDefaultLanguage();
 
     if (empty($language_options)) {
-      $form['langcode'] = array(
+      $form['langcode'] = [
         '#type' => 'value',
         '#value' => LanguageInterface::LANGCODE_SYSTEM,
-      );
-      $form['langcode_text'] = array(
+      ];
+      $form['langcode_text'] = [
         '#type' => 'item',
         '#title' => $this->t('Language'),
         '#markup' => $this->t('No language available. The export will only contain source strings.'),
-      );
+      ];
     }
     else {
-      $form['langcode'] = array(
+      $form['langcode'] = [
         '#type' => 'select',
         '#title' => $this->t('Language'),
         '#options' => $language_options,
         '#default_value' => $language_default->getId(),
         '#empty_option' => $this->t('Source text only, no translations'),
         '#empty_value' => LanguageInterface::LANGCODE_SYSTEM,
-      );
-      $form['content_options'] = array(
+      ];
+      $form['content_options'] = [
         '#type' => 'details',
         '#title' => $this->t('Export options'),
         '#tree' => TRUE,
-        '#states' => array(
-          'invisible' => array(
-            ':input[name="langcode"]' => array('value' => LanguageInterface::LANGCODE_SYSTEM),
-          ),
-        ),
-      );
-      $form['content_options']['not_customized'] = array(
+        '#states' => [
+          'invisible' => [
+            ':input[name="langcode"]' => ['value' => LanguageInterface::LANGCODE_SYSTEM],
+          ],
+        ],
+      ];
+      $form['content_options']['not_customized'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Include non-customized translations'),
         '#default_value' => TRUE,
-      );
-      $form['content_options']['customized'] = array(
+      ];
+      $form['content_options']['customized'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Include customized translations'),
         '#default_value' => TRUE,
-      );
-      $form['content_options']['not_translated'] = array(
+      ];
+      $form['content_options']['not_translated'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Include untranslated text'),
         '#default_value' => TRUE,
-      );
+      ];
     }
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions',
-    );
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Export'),
-    );
+    ];
     return $form;
   }
 
@@ -142,7 +142,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     else {
       $language = NULL;
     }
-    $content_options = $form_state->getValue('content_options', array());
+    $content_options = $form_state->getValue('content_options', []);
     $reader = new PoDatabaseReader();
     $language_name = '';
     if ($language != NULL) {
diff --git a/core/modules/locale/src/Form/ImportForm.php b/core/modules/locale/src/Form/ImportForm.php
index 0ea71809bc1fe4fa26a2fc34954e77b5a5c894f0..f2bd45b84438fd7ee39b6f1bae7c3e6f6ac765c8 100644
--- a/core/modules/locale/src/Form/ImportForm.php
+++ b/core/modules/locale/src/Form/ImportForm.php
@@ -72,7 +72,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     // Initialize a language list to the ones available, including English if we
     // are to translate Drupal to English as well.
-    $existing_languages = array();
+    $existing_languages = [];
     foreach ($languages as $langcode => $language) {
       if (locale_is_translatable($langcode)) {
         $existing_languages[$langcode] = $language->getName();
@@ -88,65 +88,65 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
     else {
       $default = key($existing_languages);
-      $language_options = array(
+      $language_options = [
         (string) $this->t('Existing languages') => $existing_languages,
         (string) $this->t('Languages not yet added') => $this->languageManager->getStandardLanguageListWithoutConfigured(),
-      );
+      ];
     }
 
-    $validators = array(
-      'file_validate_extensions' => array('po'),
-      'file_validate_size' => array(file_upload_max_size()),
-    );
-    $form['file'] = array(
+    $validators = [
+      'file_validate_extensions' => ['po'],
+      'file_validate_size' => [file_upload_max_size()],
+    ];
+    $form['file'] = [
       '#type' => 'file',
       '#title' => $this->t('Translation file'),
-      '#description' => array(
+      '#description' => [
         '#theme' => 'file_upload_help',
         '#description' => $this->t('A Gettext Portable Object file.'),
         '#upload_validators' => $validators,
-      ),
+      ],
       '#size' => 50,
       '#upload_validators' => $validators,
-      '#attributes' => array('class' => array('file-import-input')),
-    );
-    $form['langcode'] = array(
+      '#attributes' => ['class' => ['file-import-input']],
+    ];
+    $form['langcode'] = [
       '#type' => 'select',
       '#title' => $this->t('Language'),
       '#options' => $language_options,
       '#default_value' => $default,
-      '#attributes' => array('class' => array('langcode-input')),
-    );
+      '#attributes' => ['class' => ['langcode-input']],
+    ];
 
-    $form['customized'] = array(
+    $form['customized'] = [
       '#title' => $this->t('Treat imported strings as custom translations'),
       '#type' => 'checkbox',
-    );
-    $form['overwrite_options'] = array(
+    ];
+    $form['overwrite_options'] = [
       '#type' => 'container',
       '#tree' => TRUE,
-    );
-    $form['overwrite_options']['not_customized'] = array(
+    ];
+    $form['overwrite_options']['not_customized'] = [
       '#title' => $this->t('Overwrite non-customized translations'),
       '#type' => 'checkbox',
-      '#states' => array(
-        'checked' => array(
-          ':input[name="customized"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-    $form['overwrite_options']['customized'] = array(
+      '#states' => [
+        'checked' => [
+          ':input[name="customized"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+    $form['overwrite_options']['customized'] = [
       '#title' => $this->t('Overwrite existing customized translations'),
       '#type' => 'checkbox',
-    );
+    ];
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions',
-    );
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Import'),
-    );
+    ];
     return $form;
   }
 
@@ -172,21 +172,21 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if (empty($language)) {
       $language = ConfigurableLanguage::createFromLangcode($form_state->getValue('langcode'));
       $language->save();
-      drupal_set_message($this->t('The language %language has been created.', array('%language' => $this->t($language->label()))));
+      drupal_set_message($this->t('The language %language has been created.', ['%language' => $this->t($language->label())]));
     }
-    $options = array_merge(_locale_translation_default_update_options(), array(
+    $options = array_merge(_locale_translation_default_update_options(), [
       'langcode' => $form_state->getValue('langcode'),
       'overwrite_options' => $form_state->getValue('overwrite_options'),
       'customized' => $form_state->getValue('customized') ? LOCALE_CUSTOMIZED : LOCALE_NOT_CUSTOMIZED,
-    ));
+    ]);
     $this->moduleHandler->loadInclude('locale', 'bulk.inc');
     $file = locale_translate_file_attach_properties($this->file, $options);
-    $batch = locale_translate_batch_build(array($file->uri => $file), $options);
+    $batch = locale_translate_batch_build([$file->uri => $file], $options);
     batch_set($batch);
 
     // Create or update all configuration translations for this language.
     \Drupal::moduleHandler()->loadInclude('locale', 'bulk.inc');
-    if ($batch = locale_config_batch_update_components($options, array($form_state->getValue('langcode')))) {
+    if ($batch = locale_config_batch_update_components($options, [$form_state->getValue('langcode')])) {
       batch_set($batch);
     }
 
diff --git a/core/modules/locale/src/Form/LocaleSettingsForm.php b/core/modules/locale/src/Form/LocaleSettingsForm.php
index 93662244b5c79034bfcab46a2a3583ff6b2bd6e8..e722cfb2b4f2548e47ff80c7eaf87c0480bf12f9 100644
--- a/core/modules/locale/src/Form/LocaleSettingsForm.php
+++ b/core/modules/locale/src/Form/LocaleSettingsForm.php
@@ -30,35 +30,35 @@ protected function getEditableConfigNames() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('locale.settings');
 
-    $form['update_interval_days'] = array(
+    $form['update_interval_days'] = [
       '#type' => 'radios',
       '#title' => $this->t('Check for updates'),
       '#default_value' => $config->get('translation.update_interval_days'),
-      '#options' => array(
+      '#options' => [
         '0' => $this->t('Never (manually)'),
         '7' => $this->t('Weekly'),
         '30' => $this->t('Monthly'),
-      ),
-      '#description' => $this->t('Select how frequently you want to check for new interface translations for your currently installed modules and themes. <a href=":url">Check updates now</a>.', array(':url' => $this->url('locale.check_translation'))),
-    );
+      ],
+      '#description' => $this->t('Select how frequently you want to check for new interface translations for your currently installed modules and themes. <a href=":url">Check updates now</a>.', [':url' => $this->url('locale.check_translation')]),
+    ];
 
     if ($directory = $config->get('translation.path')) {
-      $description = $this->t('Translation files are stored locally in the  %path directory. You can change this directory on the <a href=":url">File system</a> configuration page.', array('%path' => $directory, ':url' => $this->url('system.file_system_settings')));
+      $description = $this->t('Translation files are stored locally in the  %path directory. You can change this directory on the <a href=":url">File system</a> configuration page.', ['%path' => $directory, ':url' => $this->url('system.file_system_settings')]);
     }
     else {
-      $description = $this->t('Translation files will not be stored locally. Change the Interface translation directory on the <a href=":url">File system configuration</a> page.', array(':url' => $this->url('system.file_system_settings')));
+      $description = $this->t('Translation files will not be stored locally. Change the Interface translation directory on the <a href=":url">File system configuration</a> page.', [':url' => $this->url('system.file_system_settings')]);
     }
     $form['#translation_directory'] = $directory;
-    $form['use_source'] = array(
+    $form['use_source'] = [
       '#type' => 'radios',
       '#title' => $this->t('Translation source'),
       '#default_value' => $config->get('translation.use_source'),
-      '#options' => array(
+      '#options' => [
         LOCALE_TRANSLATION_USE_SOURCE_REMOTE_AND_LOCAL => $this->t('Drupal translation server and local files'),
         LOCALE_TRANSLATION_USE_SOURCE_LOCAL => $this->t('Local files only'),
-      ),
+      ],
       '#description' => $this->t('The source of translation files for automatic interface translation.') . ' ' . $description,
-    );
+    ];
 
     if ($config->get('translation.overwrite_not_customized') == FALSE) {
       $default = LOCALE_TRANSLATION_OVERWRITE_NONE;
@@ -69,17 +69,17 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     else {
       $default = LOCALE_TRANSLATION_OVERWRITE_NON_CUSTOMIZED;
     }
-    $form['overwrite'] = array(
+    $form['overwrite'] = [
       '#type' => 'radios',
       '#title' => $this->t('Import behavior'),
       '#default_value' => $default,
-      '#options' => array(
+      '#options' => [
         LOCALE_TRANSLATION_OVERWRITE_NONE => $this->t("Don't overwrite existing translations."),
         LOCALE_TRANSLATION_OVERWRITE_NON_CUSTOMIZED => $this->t('Only overwrite imported translations, customized translations are kept.'),
         LOCALE_TRANSLATION_OVERWRITE_ALL => $this->t('Overwrite existing translations.'),
-      ),
+      ],
       '#description' => $this->t('How to treat existing translations when automatically updating the interface translations.'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
@@ -91,7 +91,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
     parent::validateForm($form, $form_state);
 
     if (empty($form['#translation_directory']) && $form_state->getValue('use_source') == LOCALE_TRANSLATION_USE_SOURCE_LOCAL) {
-      $form_state->setErrorByName('use_source', $this->t('You have selected local translation source, but no <a href=":url">Interface translation directory</a> was configured.', array(':url' => $this->url('system.file_system_settings'))));
+      $form_state->setErrorByName('use_source', $this->t('You have selected local translation source, but no <a href=":url">Interface translation directory</a> was configured.', [':url' => $this->url('system.file_system_settings')]));
     }
   }
 
diff --git a/core/modules/locale/src/Form/TranslateEditForm.php b/core/modules/locale/src/Form/TranslateEditForm.php
index c559f80051400ddd8dc02ebcf7528b521bd6c8c3..d629009cf85b2fb3b618c28635446e97a4b54241 100644
--- a/core/modules/locale/src/Form/TranslateEditForm.php
+++ b/core/modules/locale/src/Form/TranslateEditForm.php
@@ -32,12 +32,12 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     $form['#attached']['library'][] = 'locale/drupal.locale.admin';
 
-    $form['langcode'] = array(
+    $form['langcode'] = [
       '#type' => 'value',
       '#value' => $filter_values['langcode'],
-    );
+    ];
 
-    $form['strings'] = array(
+    $form['strings'] = [
       '#type' => 'table',
       '#tree' => TRUE,
       '#language' => $langname,
@@ -47,7 +47,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       ],
       '#empty' => $this->t('No strings available.'),
       '#attributes' => ['class' => ['locale-translate-edit-table']],
-    );
+    ];
 
     if (isset($langcode)) {
       $strings = $this->translateFilterLoadStrings();
@@ -63,14 +63,14 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         if (count($source_array) == 1) {
           // Add original string value and mark as non-plural.
           $plural = FALSE;
-          $form['strings'][$string->lid]['original'] = array(
+          $form['strings'][$string->lid]['original'] = [
             '#type' => 'item',
-            '#title' => $this->t('Source string (@language)', array('@language' => $this->t('Built-in English'))),
+            '#title' => $this->t('Source string (@language)', ['@language' => $this->t('Built-in English')]),
             '#title_display' => 'invisible',
             '#plain_text' => $source_array[0],
             '#preffix' => '<span lang="en">',
             '#suffix' => '</span>',
-          );
+          ];
         }
         else {
           // Add original string value and mark as plural.
@@ -79,7 +79,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
             '#type' => 'item',
             '#title' => $this->t('Singular form'),
             '#plain_text' => $source_array[0],
-            '#prefix' => '<span class="visually-hidden">' . $this->t('Source string (@language)', array('@language' => $this->t('Built-in English'))) . '</span><span lang="en">',
+            '#prefix' => '<span class="visually-hidden">' . $this->t('Source string (@language)', ['@language' => $this->t('Built-in English')]) . '</span><span lang="en">',
             '#suffix' => '</span>',
           ];
           $original_plural = [
@@ -108,27 +108,27 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         // Approximate the number of rows to use in the default textarea.
         $rows = min(ceil(str_word_count($source_array[0]) / 12), 10);
         if (!$plural) {
-          $form['strings'][$string->lid]['translations'][0] = array(
+          $form['strings'][$string->lid]['translations'][0] = [
             '#type' => 'textarea',
-            '#title' => $this->t('Translated string (@language)', array('@language' => $langname)),
+            '#title' => $this->t('Translated string (@language)', ['@language' => $langname]),
             '#title_display' => 'invisible',
             '#rows' => $rows,
             '#default_value' => $translation_array[0],
-            '#attributes' => array('lang' => $langcode),
-          );
+            '#attributes' => ['lang' => $langcode],
+          ];
         }
         else {
           // Add a textarea for each plural variant.
           for ($i = 0; $i < $plurals; $i++) {
-            $form['strings'][$string->lid]['translations'][$i] = array(
+            $form['strings'][$string->lid]['translations'][$i] = [
               '#type' => 'textarea',
               // @todo Should use better labels https://www.drupal.org/node/2499639
               '#title' => ($i == 0 ? $this->t('Singular form') : $this->formatPlural($i, 'First plural form', '@count. plural form')),
               '#rows' => $rows,
               '#default_value' => isset($translation_array[$i]) ? $translation_array[$i] : '',
-              '#attributes' => array('lang' => $langcode),
-              '#prefix' => $i == 0 ? ('<span class="visually-hidden">' . $this->t('Translated string (@language)', array('@language' => $langname)) . '</span>') : '',
-            );
+              '#attributes' => ['lang' => $langcode],
+              '#prefix' => $i == 0 ? ('<span class="visually-hidden">' . $this->t('Translated string (@language)', ['@language' => $langname]) . '</span>') : '',
+            ];
           }
           if ($plurals == 2) {
             // Simplify interface text for the most common case.
@@ -137,11 +137,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         }
       }
       if (count(Element::children($form['strings']))) {
-        $form['actions'] = array('#type' => 'actions');
-        $form['actions']['submit'] = array(
+        $form['actions'] = ['#type' => 'actions'];
+        $form['actions']['submit'] = [
           '#type' => 'submit',
           '#value' => $this->t('Save translations'),
-        );
+        ];
       }
     }
     $form['pager']['#type'] = 'pager';
@@ -156,9 +156,9 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
     foreach ($form_state->getValue('strings') as $lid => $translations) {
       foreach ($translations['translations'] as $key => $value) {
         if (!locale_string_is_safe($value)) {
-          $form_state->setErrorByName("strings][$lid][translations][$key", $this->t('The submitted string contains disallowed HTML: %string', array('%string' => $value)));
-          $form_state->setErrorByName("translations][$langcode][$key", $this->t('The submitted string contains disallowed HTML: %string', array('%string' => $value)));
-          $this->logger('locale')->warning('Attempted submission of a translation string with disallowed HTML: %string', array('%string' => $value));
+          $form_state->setErrorByName("strings][$lid][translations][$key", $this->t('The submitted string contains disallowed HTML: %string', ['%string' => $value]));
+          $form_state->setErrorByName("translations][$langcode][$key", $this->t('The submitted string contains disallowed HTML: %string', ['%string' => $value]));
+          $this->logger('locale')->warning('Attempted submission of a translation string with disallowed HTML: %string', ['%string' => $value]);
         }
       }
     }
@@ -169,12 +169,12 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $langcode = $form_state->getValue('langcode');
-    $updated = array();
+    $updated = [];
 
     // Preload all translations for strings in the form.
     $lids = array_keys($form_state->getValue('strings'));
-    $existing_translation_objects = array();
-    foreach ($this->localeStorage->getTranslations(array('lid' => $lids, 'language' => $langcode, 'translated' => TRUE)) as $existing_translation_object) {
+    $existing_translation_objects = [];
+    foreach ($this->localeStorage->getTranslations(['lid' => $lids, 'language' => $langcode, 'translated' => TRUE]) as $existing_translation_object) {
       $existing_translation_objects[$existing_translation_object->lid] = $existing_translation_object;
     }
 
@@ -204,7 +204,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
       if ($is_changed) {
         // Only update or insert if we have a value to use.
-        $target = isset($existing_translation_objects[$lid]) ? $existing_translation_objects[$lid] : $this->localeStorage->createTranslation(array('lid' => $lid, 'language' => $langcode));
+        $target = isset($existing_translation_objects[$lid]) ? $existing_translation_objects[$lid] : $this->localeStorage->createTranslation(['lid' => $lid, 'language' => $langcode]);
         $target->setPlurals($new_translation['translations'])
           ->setCustomized()
           ->save();
@@ -224,15 +224,15 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if (isset($page)) {
       $form_state->setRedirect(
         'locale.translate_page',
-        array(),
-        array('page' => $page)
+        [],
+        ['page' => $page]
       );
     }
 
     if ($updated) {
       // Clear cache and force refresh of JavaScript translations.
-      _locale_refresh_translations(array($langcode), $updated);
-      _locale_refresh_configuration(array($langcode), $updated);
+      _locale_refresh_translations([$langcode], $updated);
+      _locale_refresh_configuration([$langcode], $updated);
     }
   }
 
diff --git a/core/modules/locale/src/Form/TranslateFilterForm.php b/core/modules/locale/src/Form/TranslateFilterForm.php
index b3975b81ccd5b6f1b3c7a7617f56cb1440237d83..aeef26f8ffb58406cf688f2a4e278955689eba4e 100644
--- a/core/modules/locale/src/Form/TranslateFilterForm.php
+++ b/core/modules/locale/src/Form/TranslateFilterForm.php
@@ -25,24 +25,24 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     $form['#attached']['library'][] = 'locale/drupal.locale.admin';
 
-    $form['filters'] = array(
+    $form['filters'] = [
       '#type' => 'details',
       '#title' => $this->t('Filter translatable strings'),
       '#open' => TRUE,
-    );
+    ];
     foreach ($filters as $key => $filter) {
       // Special case for 'string' filter.
       if ($key == 'string') {
-        $form['filters']['status']['string'] = array(
+        $form['filters']['status']['string'] = [
           '#type' => 'search',
           '#title' => $filter['title'],
           '#description' => $filter['description'],
           '#default_value' => $filter_values[$key],
-        );
+        ];
       }
       else {
         $empty_option = isset($filter['options'][$filter['default']]) ? $filter['options'][$filter['default']] : '- None -';
-        $form['filters']['status'][$key] = array(
+        $form['filters']['status'][$key] = [
           '#title' => $filter['title'],
           '#type' => 'select',
           '#empty_value' => $filter['default'],
@@ -50,27 +50,27 @@ public function buildForm(array $form, FormStateInterface $form_state) {
           '#size' => 0,
           '#options' => $filter['options'],
           '#default_value' => $filter_values[$key],
-        );
+        ];
         if (isset($filter['states'])) {
           $form['filters']['status'][$key]['#states'] = $filter['states'];
         }
       }
     }
 
-    $form['filters']['actions'] = array(
+    $form['filters']['actions'] = [
       '#type' => 'actions',
-      '#attributes' => array('class' => array('container-inline')),
-    );
-    $form['filters']['actions']['submit'] = array(
+      '#attributes' => ['class' => ['container-inline']],
+    ];
+    $form['filters']['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Filter'),
-    );
+    ];
     if (!empty($_SESSION['locale_translate_filter'])) {
-      $form['filters']['actions']['reset'] = array(
+      $form['filters']['actions']['reset'] = [
         '#type' => 'submit',
         '#value' => $this->t('Reset'),
-        '#submit' => array('::resetForm'),
-      );
+        '#submit' => ['::resetForm'],
+      ];
     }
 
     return $form;
@@ -93,7 +93,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
    * Provides a submit handler for the reset button.
    */
   public function resetForm(array &$form, FormStateInterface $form_state) {
-    $_SESSION['locale_translate_filter'] = array();
+    $_SESSION['locale_translate_filter'] = [];
     $form_state->setRedirect('locale.translate_page');
   }
 
diff --git a/core/modules/locale/src/Form/TranslateFormBase.php b/core/modules/locale/src/Form/TranslateFormBase.php
index ba5f7c316c1dd468b87f80353d09f344716aa4d5..9a7ad8bab8ce701be5c28d1b65679f0f4299a9ca 100644
--- a/core/modules/locale/src/Form/TranslateFormBase.php
+++ b/core/modules/locale/src/Form/TranslateFormBase.php
@@ -81,8 +81,8 @@ protected function translateFilterLoadStrings() {
 
     // Language is sanitized to be one of the possible options in
     // translateFilterValues().
-    $conditions = array('language' => $filter_values['langcode']);
-    $options = array('pager limit' => 30, 'translated' => TRUE, 'untranslated' => TRUE);
+    $conditions = ['language' => $filter_values['langcode']];
+    $options = ['pager limit' => 30, 'translated' => TRUE, 'untranslated' => TRUE];
 
     // Add translation status conditions and options.
     switch ($filter_values['translation']) {
@@ -123,7 +123,7 @@ protected function translateFilterValues($reset = FALSE) {
       return static::$filterValues;
     }
 
-    $filter_values = array();
+    $filter_values = [];
     $filters = $this->translateFilters();
     foreach ($filters as $key => $filter) {
       $filter_values[$key] = $filter['default'];
@@ -152,12 +152,12 @@ protected function translateFilterValues($reset = FALSE) {
    * Lists locale translation filters that can be applied.
    */
   protected function translateFilters() {
-    $filters = array();
+    $filters = [];
 
     // Get all languages, except English.
     $this->languageManager->reset();
     $languages = $this->languageManager->getLanguages();
-    $language_options = array();
+    $language_options = [];
     foreach ($languages as $langcode => $language) {
       if (locale_is_translatable($langcode)) {
         $language_options[$langcode] = $language->getName();
@@ -171,42 +171,42 @@ protected function translateFilters() {
       $default_langcode = array_shift($available_langcodes);
     }
 
-    $filters['string'] = array(
+    $filters['string'] = [
       'title' => $this->t('String contains'),
       'description' => $this->t('Leave blank to show all strings. The search is case sensitive.'),
       'default' => '',
-    );
+    ];
 
-    $filters['langcode'] = array(
+    $filters['langcode'] = [
       'title' => $this->t('Translation language'),
       'options' => $language_options,
       'default' => $default_langcode,
-    );
+    ];
 
-    $filters['translation'] = array(
+    $filters['translation'] = [
       'title' => $this->t('Search in'),
-      'options' => array(
+      'options' => [
         'all' => $this->t('Both translated and untranslated strings'),
         'translated' => $this->t('Only translated strings'),
         'untranslated' => $this->t('Only untranslated strings'),
-      ),
+      ],
       'default' => 'all',
-    );
+    ];
 
-    $filters['customized'] = array(
+    $filters['customized'] = [
       'title' => $this->t('Translation type'),
-      'options' => array(
+      'options' => [
         'all' => $this->t('All'),
         LOCALE_NOT_CUSTOMIZED => $this->t('Non-customized translation'),
         LOCALE_CUSTOMIZED => $this->t('Customized translation'),
-      ),
-      'states' => array(
-        'visible' => array(
-          ':input[name=translation]' => array('value' => 'translated'),
-        ),
-      ),
+      ],
+      'states' => [
+        'visible' => [
+          ':input[name=translation]' => ['value' => 'translated'],
+        ],
+      ],
       'default' => 'all',
-    );
+    ];
 
     return $filters;
   }
diff --git a/core/modules/locale/src/Form/TranslationStatusForm.php b/core/modules/locale/src/Form/TranslationStatusForm.php
index 31f8bb958a382fd82ffd5b5c48693fb40443ea42..cbf4d4a55ea47dc48804ba0cbd90a2217806439c 100644
--- a/core/modules/locale/src/Form/TranslationStatusForm.php
+++ b/core/modules/locale/src/Form/TranslationStatusForm.php
@@ -65,10 +65,10 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $languages = locale_translatable_language_list();
     $status = locale_translation_get_status();
-    $options = array();
-    $languages_update = array();
-    $languages_not_found = array();
-    $projects_update = array();
+    $options = [];
+    $languages_update = [];
+    $languages_not_found = [];
+    $projects_update = [];
     // Prepare information about projects which have available translation
     // updates.
     if ($languages && $status) {
@@ -77,24 +77,24 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       // Build data options for the select table.
       foreach ($updates as $langcode => $update) {
         $title = $languages[$langcode]->getName();
-        $locale_translation_update_info = array('#theme' => 'locale_translation_update_info');
-        foreach (array('updates', 'not_found') as $update_status) {
+        $locale_translation_update_info = ['#theme' => 'locale_translation_update_info'];
+        foreach (['updates', 'not_found'] as $update_status) {
           if (isset($update[$update_status])) {
             $locale_translation_update_info['#' . $update_status] = $update[$update_status];
           }
         }
-        $options[$langcode] = array(
-          'title' => array(
-            'data' => array(
+        $options[$langcode] = [
+          'title' => [
+            'data' => [
               '#title' => $title,
               '#plain_text' => $title,
-            ),
-          ),
-          'status' => array(
-            'class' => array('description', 'priority-low'),
+            ],
+          ],
+          'status' => [
+            'class' => ['description', 'priority-low'],
             'data' => $locale_translation_update_info,
-          ),
-        );
+          ],
+        ];
         if (!empty($update['not_found'])) {
           $languages_not_found[$langcode] = $langcode;
         }
@@ -110,43 +110,43 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     $last_checked = $this->state->get('locale.translation_last_checked');
-    $form['last_checked'] = array(
+    $form['last_checked'] = [
       '#theme' => 'locale_translation_last_check',
       '#last' => $last_checked,
-    );
+    ];
 
-    $header = array(
-      'title' => array(
+    $header = [
+      'title' => [
         'data' => $this->t('Language'),
-        'class' => array('title'),
-      ),
-      'status' => array(
+        'class' => ['title'],
+      ],
+      'status' => [
         'data' => $this->t('Status'),
-        'class' => array('status', 'priority-low'),
-      ),
-    );
+        'class' => ['status', 'priority-low'],
+      ],
+    ];
 
     if (!$languages) {
-      $empty = $this->t('No translatable languages available. <a href=":add_language">Add a language</a> first.', array(
+      $empty = $this->t('No translatable languages available. <a href=":add_language">Add a language</a> first.', [
         ':add_language' => $this->url('entity.configurable_language.collection'),
-      ));
+      ]);
     }
     elseif ($status) {
       $empty = $this->t('All translations up to date.');
     }
     else {
-      $empty = $this->t('No translation status available. <a href=":check">Check manually</a>.', array(
+      $empty = $this->t('No translation status available. <a href=":check">Check manually</a>.', [
         ':check' => $this->url('locale.check_translation'),
-      ));
+      ]);
     }
 
     // The projects which require an update. Used by the _submit callback.
-    $form['projects_update'] = array(
+    $form['projects_update'] = [
       '#type' => 'value',
       '#value' => $projects_update,
-    );
+    ];
 
-    $form['langcodes'] = array(
+    $form['langcodes'] = [
       '#type' => 'tableselect',
       '#header' => $header,
       '#options' => $options,
@@ -156,17 +156,17 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#multiple' => TRUE,
       '#required' => TRUE,
       '#not_found' => $languages_not_found,
-      '#after_build' => array('locale_translation_language_table'),
-    );
+      '#after_build' => ['locale_translation_language_table'],
+    ];
 
     $form['#attached']['library'][] = 'locale/drupal.locale.admin';
 
-    $form['actions'] = array('#type' => 'actions');
+    $form['actions'] = ['#type' => 'actions'];
     if ($languages_update) {
-      $form['actions']['submit'] = array(
+      $form['actions']['submit'] = [
         '#type' => 'submit',
         '#value' => $this->t('Update translations'),
-      );
+      ];
     }
 
     return $form;
@@ -183,7 +183,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    *   translation update status.
    */
   protected function prepareUpdateData(array $status) {
-    $updates = array();
+    $updates = [];
 
     // @todo Calling locale_translation_build_projects() is an expensive way to
     //   get a module name. In follow-up issue
@@ -196,22 +196,22 @@ protected function prepareUpdateData(array $status) {
       foreach ($project as $langcode => $project_info) {
         // No translation file found for this project-language combination.
         if (empty($project_info->type)) {
-          $updates[$langcode]['not_found'][] = array(
+          $updates[$langcode]['not_found'][] = [
             'name' => $project_info->name == 'drupal' ? $this->t('Drupal core') : $project_data[$project_info->name]->info['name'],
             'version' => $project_info->version,
             'info' => $this->createInfoString($project_info),
-          );
+          ];
         }
         // Translation update found for this project-language combination.
         elseif ($project_info->type == LOCALE_TRANSLATION_LOCAL || $project_info->type == LOCALE_TRANSLATION_REMOTE) {
           $local = isset($project_info->files[LOCALE_TRANSLATION_LOCAL]) ? $project_info->files[LOCALE_TRANSLATION_LOCAL] : NULL;
           $remote = isset($project_info->files[LOCALE_TRANSLATION_REMOTE]) ? $project_info->files[LOCALE_TRANSLATION_REMOTE] : NULL;
           $recent = _locale_translation_source_compare($local, $remote) == LOCALE_TRANSLATION_SOURCE_COMPARE_LT ? $remote : $local;
-          $updates[$langcode]['updates'][] = array(
+          $updates[$langcode]['updates'][] = [
             'name' => $project_info->name == 'drupal' ? $this->t('Drupal core') : $project_data[$project_info->name]->info['name'],
             'version' => $project_info->version,
             'timestamp' => $recent->timestamp,
-          );
+          ];
         }
       }
     }
@@ -238,13 +238,13 @@ protected function createInfoString($project_info) {
     $local_path = isset($project_info->files['local']->uri) ? $project_info->files['local']->uri : FALSE;
 
     if (locale_translation_use_remote_source() && $remote_path && $local_path) {
-      return $this->t('File not found at %remote_path nor at %local_path', array(
+      return $this->t('File not found at %remote_path nor at %local_path', [
         '%remote_path' => $remote_path,
         '%local_path' => $local_path,
-      ));
+      ]);
     }
     elseif ($local_path) {
-      return $this->t('File not found at %local_path', array('%local_path' => $local_path));
+      return $this->t('File not found at %local_path', ['%local_path' => $local_path]);
     }
     return $this->t('Translation file location could not be determined.');
   }
@@ -279,7 +279,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $last_checked = $this->state->get('locale.translation_last_checked');
     if ($last_checked < REQUEST_TIME - LOCALE_TRANSLATION_STATUS_TTL) {
       locale_translation_clear_status();
-      $batch = locale_translation_batch_update_build(array(), $langcodes, $options);
+      $batch = locale_translation_batch_update_build([], $langcodes, $options);
       batch_set($batch);
     }
     else {
diff --git a/core/modules/locale/src/Gettext.php b/core/modules/locale/src/Gettext.php
index 5573f43d6a33a5cc4ac903668742b5ef9b8afff1..44677aa28b64443393590c5f9f2b25e627d2ca18 100644
--- a/core/modules/locale/src/Gettext.php
+++ b/core/modules/locale/src/Gettext.php
@@ -41,12 +41,12 @@ class Gettext {
    */
   public static function fileToDatabase($file, $options) {
     // Add the default values to the options array.
-    $options += array(
-      'overwrite_options' => array(),
+    $options += [
+      'overwrite_options' => [],
       'customized' => LOCALE_NOT_CUSTOMIZED,
       'items' => -1,
       'seek' => 0,
-    );
+    ];
     // Instantiate and initialize the stream reader for this file.
     $reader = new PoStreamReader();
     $reader->setLangcode($file->langcode);
@@ -67,10 +67,10 @@ public static function fileToDatabase($file, $options) {
     // Initialize the database writer.
     $writer = new PoDatabaseWriter();
     $writer->setLangcode($file->langcode);
-    $writer_options = array(
+    $writer_options = [
       'overwrite_options' => $options['overwrite_options'],
       'customized' => $options['customized'],
-    );
+    ];
     $writer->setOptions($writer_options);
     $writer->setHeader($header);
 
diff --git a/core/modules/locale/src/LocaleConfigManager.php b/core/modules/locale/src/LocaleConfigManager.php
index bc598e21de73d2d7210e4e8cb5bfbabd6a280415..e67f3bc4a270eaaf22f8594918495e65d874cfdb 100644
--- a/core/modules/locale/src/LocaleConfigManager.php
+++ b/core/modules/locale/src/LocaleConfigManager.php
@@ -147,7 +147,7 @@ public function getTranslatableDefaultConfig($name) {
         return $this->getTranslatableData($typed_config);
       }
     }
-    return array();
+    return [];
   }
 
   /**
@@ -163,7 +163,7 @@ public function getTranslatableDefaultConfig($name) {
    *   TranslatableMarkup.
    */
   protected function getTranslatableData(TypedDataInterface $element) {
-    $translatable = array();
+    $translatable = [];
     if ($element instanceof TraversableTypedDataInterface) {
       foreach ($element as $key => $property) {
         $value = $this->getTranslatableData($property);
@@ -178,11 +178,11 @@ protected function getTranslatableData(TypedDataInterface $element) {
       $value = $element->getValue();
       $definition = $element->getDataDefinition();
       if (!empty($definition['translatable']) && $value !== '' && $value !== NULL) {
-        $options = array();
+        $options = [];
         if (isset($definition['translation context'])) {
           $options['context'] = $definition['translation context'];
         }
-        return new TranslatableMarkup($value, array(), $options);
+        return new TranslatableMarkup($value, [], $options);
       }
     }
     return $translatable;
@@ -215,7 +215,7 @@ protected function getTranslatableData(TypedDataInterface $element) {
    * @see self::getTranslatableData()
    */
   protected function processTranslatableData($name, array $active, array $translatable, $langcode) {
-    $translated = array();
+    $translated = [];
     foreach ($translatable as $key => $item) {
       if (!isset($active[$key])) {
         continue;
@@ -296,10 +296,10 @@ protected function deleteTranslationOverride($name, $langcode) {
    * @return array
    *   Array of configuration object names.
    */
-  public function getComponentNames(array $components = array()) {
+  public function getComponentNames(array $components = []) {
     $components = array_filter($components);
     if ($components) {
-      $names = array();
+      $names = [];
       foreach ($components as $type => $list) {
         // InstallStorage::getComponentNames returns a list of folders keyed by
         // config name.
@@ -322,8 +322,8 @@ public function getComponentNames(array $components = array()) {
    *   Array of configuration object names.
    */
   public function getStringNames(array $lids) {
-    $names = array();
-    $locations = $this->localeStorage->getLocations(array('sid' => $lids, 'type' => 'configuration'));
+    $names = [];
+    $locations = $this->localeStorage->getLocations(['sid' => $lids, 'type' => 'configuration']);
     foreach ($locations as $location) {
       $names[$location->name] = $location->name;
     }
@@ -370,15 +370,15 @@ public function translateString($name, $langcode, $source, $context) {
       // If translations for a language have not been loaded yet.
       if (!isset($this->translations[$name][$langcode])) {
         // Preload all translations for this configuration name and language.
-        $this->translations[$name][$langcode] = array();
-        foreach ($this->localeStorage->getTranslations(array('language' => $langcode, 'type' => 'configuration', 'name' => $name)) as $string) {
+        $this->translations[$name][$langcode] = [];
+        foreach ($this->localeStorage->getTranslations(['language' => $langcode, 'type' => 'configuration', 'name' => $name]) as $string) {
           $this->translations[$name][$langcode][$string->context][$string->source] = $string;
         }
       }
       if (!isset($this->translations[$name][$langcode][$context][$source])) {
         // There is no translation of the source string in this config location
         // to this language for this context.
-        if ($translation = $this->localeStorage->findTranslation(array('source' => $source, 'context' => $context, 'language' => $langcode))) {
+        if ($translation = $this->localeStorage->findTranslation(['source' => $source, 'context' => $context, 'language' => $langcode])) {
           // Look for a translation of the string. It might have one, but not
           // be saved in this configuration location yet.
           // If the string has a translation for this context to this language,
@@ -393,7 +393,7 @@ public function translateString($name, $langcode, $source, $context) {
           // location so it can be translated, and the string is faster to look
           // for next time.
           $translation = $this->localeStorage
-            ->createString(array('source' => $source, 'context' => $context))
+            ->createString(['source' => $source, 'context' => $context])
             ->addLocation('configuration', $name)
             ->save();
         }
@@ -418,7 +418,7 @@ public function translateString($name, $langcode, $source, $context) {
    * @return $this
    */
   public function reset() {
-    $this->translations = array();
+    $this->translations = [];
     return $this;
   }
 
@@ -442,7 +442,7 @@ public function getStringTranslation($name, $langcode, $source, $context) {
       $this->translateString($name, $langcode, $source, $context);
       if ($string = $this->translations[$name][$langcode][$context][$source]) {
         if (!$string->isTranslation()) {
-          $conditions = array('lid' => $string->lid, 'language' => $langcode);
+          $conditions = ['lid' => $string->lid, 'language' => $langcode];
           $translation = $this->localeStorage->createTranslation($conditions);
           $this->translations[$name][$langcode][$context][$source] = $translation;
           return $translation;
@@ -564,7 +564,7 @@ public function isUpdatingTranslationsFromLocale() {
    *   Total number of configuration override and active configuration objects
    *   updated (saved or removed).
    */
-  public function updateConfigTranslations(array $names, array $langcodes = array()) {
+  public function updateConfigTranslations(array $names, array $langcodes = []) {
     $langcodes = $langcodes ? $langcodes : array_keys($this->languageManager->getLanguages());
     $count = 0;
     foreach ($names as $name) {
@@ -589,7 +589,7 @@ public function updateConfigTranslations(array $names, array $langcodes = array(
           $data = $this->filterOverride($override->get(), $translatable);
           if (!empty($processed)) {
             // Merge in the Locale managed translations with existing data.
-            $data = NestedArray::mergeDeepArray(array($data, $processed), TRUE);
+            $data = NestedArray::mergeDeepArray([$data, $processed], TRUE);
           }
           if (empty($data) && !$override->isNew()) {
             // The configuration override contains Locale overrides that no
@@ -607,7 +607,7 @@ public function updateConfigTranslations(array $names, array $langcodes = array(
           // If the language code is the active storage language, we should
           // update. If it is English, we should only update if English is also
           // translatable.
-          $active = NestedArray::mergeDeepArray(array($active, $processed), TRUE);
+          $active = NestedArray::mergeDeepArray([$active, $processed], TRUE);
           $this->saveTranslationActive($name, $active);
           $count++;
         }
@@ -629,7 +629,7 @@ public function updateConfigTranslations(array $names, array $langcodes = array(
    *   also in $translatable.
    */
   protected function filterOverride(array $override_data, array $translatable) {
-    $filtered_data = array();
+    $filtered_data = [];
     foreach ($override_data as $key => $value) {
       if (isset($translatable[$key])) {
         // If the translatable default configuration has this key, look further
diff --git a/core/modules/locale/src/LocaleConfigSubscriber.php b/core/modules/locale/src/LocaleConfigSubscriber.php
index 3542a06c645d8414303cf0b7497d0a7ab3665d56..d06cb34dec3caa7120066c34ba5bd2167de50000 100644
--- a/core/modules/locale/src/LocaleConfigSubscriber.php
+++ b/core/modules/locale/src/LocaleConfigSubscriber.php
@@ -114,7 +114,7 @@ public function onOverrideChange(LanguageConfigOverrideCrudEvent $event) {
    *   override. This allows us to update locale keys for data not in the
    *   override but still in the active configuration.
    */
-  protected function updateLocaleStorage(StorableConfigBase $config, $langcode, array $reference_config = array()) {
+  protected function updateLocaleStorage(StorableConfigBase $config, $langcode, array $reference_config = []) {
     $name = $config->getName();
     if ($this->localeConfigManager->isSupported($name) && locale_is_translatable($langcode)) {
       $translatables = $this->localeConfigManager->getTranslatableDefaultConfig($name);
@@ -139,7 +139,7 @@ protected function updateLocaleStorage(StorableConfigBase $config, $langcode, ar
    *   override. This allows us to update locale keys for data not in the
    *   override but still in the active configuration.
    */
-  protected function processTranslatableData($name, array $config, array $translatable, $langcode, array $reference_config = array()) {
+  protected function processTranslatableData($name, array $config, array $translatable, $langcode, array $reference_config = []) {
     foreach ($translatable as $key => $item) {
       if (!isset($config[$key])) {
         if (isset($reference_config[$key])) {
@@ -148,7 +148,7 @@ protected function processTranslatableData($name, array $config, array $translat
         continue;
       }
       if (is_array($item)) {
-        $reference_config = isset($reference_config[$key]) ? $reference_config[$key] : array();
+        $reference_config = isset($reference_config[$key]) ? $reference_config[$key] : [];
         $this->processTranslatableData($name, $config[$key], $item, $langcode, $reference_config);
       }
       else {
diff --git a/core/modules/locale/src/LocaleEvent.php b/core/modules/locale/src/LocaleEvent.php
index 2a224774937764df2ec66c23422761cd0258bf9f..6e919a64209feb91e6de6cfac0ad96c66140b8db 100644
--- a/core/modules/locale/src/LocaleEvent.php
+++ b/core/modules/locale/src/LocaleEvent.php
@@ -31,7 +31,7 @@ class LocaleEvent extends Event {
    * @param array $lids
    *   (optional) List of string identifiers that have been updated / created.
    */
-  public function __construct(array $lang_codes, array $lids = array()) {
+  public function __construct(array $lang_codes, array $lids = []) {
     $this->langCodes = $lang_codes;
     $this->lids = $lids;
   }
diff --git a/core/modules/locale/src/LocaleLookup.php b/core/modules/locale/src/LocaleLookup.php
index 6bcb88c22cd64f6d6c6d5fb0574daedfb981b547..9290efc3058a09a4de2ee8208c942df6a760a14d 100644
--- a/core/modules/locale/src/LocaleLookup.php
+++ b/core/modules/locale/src/LocaleLookup.php
@@ -99,7 +99,7 @@ public function __construct($langcode, $context, StringStorageInterface $string_
 
     $this->cache = $cache;
     $this->lock = $lock;
-    $this->tags = array('locale');
+    $this->tags = ['locale'];
     $this->requestStack = $request_stack;
   }
 
@@ -123,7 +123,7 @@ protected function getCid() {
       // cache misses that need to be written into the cache. Prevent that by
       // resetting that list. All that happens in such a case are a few uncached
       // translation lookups.
-      $this->keysToPersist = array();
+      $this->keysToPersist = [];
     }
     return $this->cid;
   }
@@ -132,11 +132,11 @@ protected function getCid() {
    * {@inheritdoc}
    */
   protected function resolveCacheMiss($offset) {
-    $translation = $this->stringStorage->findTranslation(array(
+    $translation = $this->stringStorage->findTranslation([
       'language' => $this->langcode,
       'source' => $offset,
       'context' => $this->context,
-    ));
+    ]);
 
     if ($translation) {
       $value = !empty($translation->translation) ? $translation->translation : TRUE;
@@ -144,25 +144,25 @@ protected function resolveCacheMiss($offset) {
     else {
       // We don't have the source string, update the {locales_source} table to
       // indicate the string is not translated.
-      $this->stringStorage->createString(array(
+      $this->stringStorage->createString([
         'source' => $offset,
         'context' => $this->context,
         'version' => \Drupal::VERSION,
-      ))->addLocation('path', $this->requestStack->getCurrentRequest()->getRequestUri())->save();
+      ])->addLocation('path', $this->requestStack->getCurrentRequest()->getRequestUri())->save();
       $value = TRUE;
     }
 
     // If there is no translation available for the current language then use
     // language fallback to try other translations.
     if ($value === TRUE) {
-      $fallbacks = $this->languageManager->getFallbackCandidates(array('langcode' => $this->langcode, 'operation' => 'locale_lookup', 'data' => $offset));
+      $fallbacks = $this->languageManager->getFallbackCandidates(['langcode' => $this->langcode, 'operation' => 'locale_lookup', 'data' => $offset]);
       if (!empty($fallbacks)) {
         foreach ($fallbacks as $langcode) {
-          $translation = $this->stringStorage->findTranslation(array(
+          $translation = $this->stringStorage->findTranslation([
             'language' => $langcode,
             'source' => $offset,
             'context' => $this->context,
-          ));
+          ]);
 
           if ($translation && !empty($translation->translation)) {
             $value = $translation->translation;
diff --git a/core/modules/locale/src/LocaleProjectStorage.php b/core/modules/locale/src/LocaleProjectStorage.php
index 907bd6cd7c3b73ca4b38d50aa16e3809a228d25e..5b352f2cdda9c66f70ce90f21d771077d8313aa0 100644
--- a/core/modules/locale/src/LocaleProjectStorage.php
+++ b/core/modules/locale/src/LocaleProjectStorage.php
@@ -21,7 +21,7 @@ class LocaleProjectStorage implements LocaleProjectStorageInterface {
    *
    * @var array
    */
-  protected $cache = array();
+  protected $cache = [];
 
   /**
    * Cache status flag.
@@ -44,7 +44,7 @@ function __construct(KeyValueFactoryInterface $key_value_factory) {
    * {@inheritdoc}
    */
   public function get($key, $default = NULL) {
-    $values = $this->getMultiple(array($key));
+    $values = $this->getMultiple([$key]);
     return isset($values[$key]) ? $values[$key] : $default;
   }
 
@@ -52,8 +52,8 @@ public function get($key, $default = NULL) {
    * {@inheritdoc}
    */
   public function getMultiple(array $keys) {
-    $values = array();
-    $load = array();
+    $values = [];
+    $load = [];
     foreach ($keys as $key) {
       // Check if we have a value in the cache.
       if (isset($this->cache[$key])) {
@@ -87,7 +87,7 @@ public function getMultiple(array $keys) {
    * {@inheritdoc}
    */
   public function set($key, $value) {
-    $this->setMultiple(array($key => $value));
+    $this->setMultiple([$key => $value]);
   }
 
   /**
@@ -104,7 +104,7 @@ public function setMultiple(array $data) {
    * {@inheritdoc}
    */
   public function delete($key) {
-    $this->deleteMultiple(array($key));
+    $this->deleteMultiple([$key]);
   }
 
   /**
@@ -121,7 +121,7 @@ public function deleteMultiple(array $keys) {
    * {@inheritdoc}
    */
   public function resetCache() {
-    $this->cache = array();
+    $this->cache = [];
     static::$all = FALSE;
   }
 
diff --git a/core/modules/locale/src/LocaleTranslation.php b/core/modules/locale/src/LocaleTranslation.php
index 04f3d62ecfaacda9be9a76007a42089e1dc184c2..94125e91d85fab52b67371d2d9c814a16c98ca82 100644
--- a/core/modules/locale/src/LocaleTranslation.php
+++ b/core/modules/locale/src/LocaleTranslation.php
@@ -40,7 +40,7 @@ class LocaleTranslation implements TranslatorInterface, DestructableInterface {
    *   Array of \Drupal\locale\LocaleLookup objects indexed by language code
    *   and context.
    */
-  protected $translations = array();
+  protected $translations = [];
 
   /**
    * The cache backend that should be used.
@@ -137,7 +137,7 @@ protected function canTranslateEnglish() {
    */
   public function reset() {
     unset($this->translateEnglish);
-    $this->translations = array();
+    $this->translations = [];
   }
 
   /**
diff --git a/core/modules/locale/src/PoDatabaseReader.php b/core/modules/locale/src/PoDatabaseReader.php
index d5c3cd72f1e312a104bbccfc9b4ca3b6fe656bd0..55c2b690ada80de43f1b9b441a2361120b7907cd 100644
--- a/core/modules/locale/src/PoDatabaseReader.php
+++ b/core/modules/locale/src/PoDatabaseReader.php
@@ -45,7 +45,7 @@ class PoDatabaseReader implements PoReaderInterface {
    * Constructor, initializes with default options.
    */
   public function __construct() {
-    $this->setOptions(array());
+    $this->setOptions([]);
   }
 
   /**
@@ -73,11 +73,11 @@ public function getOptions() {
    * Set the options for the current reader.
    */
   public function setOptions(array $options) {
-    $options += array(
+    $options += [
       'customized' => FALSE,
       'not_customized' => FALSE,
       'not_translated' => FALSE,
-    );
+    ];
     $this->options = $options;
   }
 
@@ -104,7 +104,7 @@ public function setHeader(PoHeader $header) {
   private function loadStrings() {
     $langcode = $this->langcode;
     $options = $this->options;
-    $conditions = array();
+    $conditions = [];
 
     if (array_sum($options) == 0) {
       // If user asked to not include anything in the translation files,
diff --git a/core/modules/locale/src/PoDatabaseWriter.php b/core/modules/locale/src/PoDatabaseWriter.php
index f0be23a569def64b0f09ab30987b84c2cfed6640..988f7f3be11f023cf94851547b7a7ce11c34c759 100644
--- a/core/modules/locale/src/PoDatabaseWriter.php
+++ b/core/modules/locale/src/PoDatabaseWriter.php
@@ -89,14 +89,14 @@ public function getReport() {
    * @param array $report
    *   Associative array with result information.
    */
-  public function setReport($report = array()) {
-    $report += array(
+  public function setReport($report = []) {
+    $report += [
       'additions' => 0,
       'updates' => 0,
       'deletes' => 0,
       'skips' => 0,
-      'strings' => array(),
-    );
+      'strings' => [],
+    ];
     $this->report = $report;
   }
 
@@ -112,15 +112,15 @@ public function getOptions() {
    */
   public function setOptions(array $options) {
     if (!isset($options['overwrite_options'])) {
-      $options['overwrite_options'] = array();
+      $options['overwrite_options'] = [];
     }
-    $options['overwrite_options'] += array(
+    $options['overwrite_options'] += [
       'not_customized' => FALSE,
       'customized' => FALSE,
-    );
-    $options += array(
+    ];
+    $options += [
       'customized' => LOCALE_NOT_CUSTOMIZED,
-    );
+    ];
     $this->options = $options;
   }
 
@@ -148,7 +148,7 @@ public function getHeader() {
    */
   public function setHeader(PoHeader $header) {
     $this->header = $header;
-    $locale_plurals = \Drupal::state()->get('locale.translation.plurals') ?: array();
+    $locale_plurals = \Drupal::state()->get('locale.translation.plurals') ?: [];
 
     // Check for options.
     $options = $this->getOptions();
@@ -205,10 +205,10 @@ public function writeItems(PoReaderInterface $reader, $count = -1) {
    */
   private function importString(PoItem $item) {
     // Initialize overwrite options if not set.
-    $this->options['overwrite_options'] += array(
+    $this->options['overwrite_options'] += [
       'not_customized' => FALSE,
       'customized' => FALSE,
-    );
+    ];
     $overwrite_options = $this->options['overwrite_options'];
     $customized = $this->options['customized'];
 
@@ -217,17 +217,17 @@ private function importString(PoItem $item) {
     $translation = $item->getTranslation();
 
     // Look up the source string and any existing translation.
-    $strings = \Drupal::service('locale.storage')->getTranslations(array(
+    $strings = \Drupal::service('locale.storage')->getTranslations([
       'language' => $this->langcode,
       'source' => $source,
       'context' => $context,
-    ));
+    ]);
     $string = reset($strings);
 
     if (!empty($translation)) {
       // Skip this string unless it passes a check for dangerous code.
       if (!locale_string_is_safe($translation)) {
-        \Drupal::logger('locale')->error('Import of string "%string" was skipped because of disallowed or malformed HTML.', array('%string' => $translation));
+        \Drupal::logger('locale')->error('Import of string "%string" was skipped because of disallowed or malformed HTML.', ['%string' => $translation]);
         $this->report['skips']++;
         return 0;
       }
@@ -235,10 +235,10 @@ private function importString(PoItem $item) {
         $string->setString($translation);
         if ($string->isNew()) {
           // No translation in this language.
-          $string->setValues(array(
+          $string->setValues([
             'language' => $this->langcode,
             'customized' => $customized,
-          ));
+          ]);
           $string->save();
           $this->report['additions']++;
         }
@@ -253,14 +253,14 @@ private function importString(PoItem $item) {
       }
       else {
         // No such source string in the database yet.
-        $string = \Drupal::service('locale.storage')->createString(array('source' => $source, 'context' => $context))
+        $string = \Drupal::service('locale.storage')->createString(['source' => $source, 'context' => $context])
           ->save();
-        \Drupal::service('locale.storage')->createTranslation(array(
+        \Drupal::service('locale.storage')->createTranslation([
           'lid' => $string->getId(),
           'language' => $this->langcode,
           'translation' => $translation,
           'customized' => $customized,
-        ))->save();
+        ])->save();
 
         $this->report['additions']++;
         $this->report['strings'][] = $string->getId();
diff --git a/core/modules/locale/src/StringBase.php b/core/modules/locale/src/StringBase.php
index 2569289c227ea9f56bf3dfdd9fa36dbcd0786dac..63cd781a54a4d0956180ddee42b77599100ad75c 100644
--- a/core/modules/locale/src/StringBase.php
+++ b/core/modules/locale/src/StringBase.php
@@ -57,7 +57,7 @@ abstract class StringBase implements StringInterface {
    * @param object|array $values
    *   Object or array with initial values.
    */
-  public function __construct($values = array()) {
+  public function __construct($values = []) {
     $this->setValues((array) $values);
   }
 
@@ -137,7 +137,7 @@ public function setValues(array $values, $override = TRUE) {
    * {@inheritdoc}
    */
   public function getValues(array $fields) {
-    $values = array();
+    $values = [];
     foreach ($fields as $field) {
       if (isset($this->$field)) {
         $values[$field] = $this->$field;
@@ -151,12 +151,12 @@ public function getValues(array $fields) {
    */
   public function getLocations($check_only = FALSE) {
     if (!isset($this->locations) && !$check_only) {
-      $this->locations = array();
-      foreach ($this->getStorage()->getLocations(array('sid' => $this->getId())) as $location) {
+      $this->locations = [];
+      foreach ($this->getStorage()->getLocations(['sid' => $this->getId()]) as $location) {
         $this->locations[$location->type][$location->name] = $location->lid;
       }
     }
-    return isset($this->locations) ? $this->locations : array();
+    return isset($this->locations) ? $this->locations : [];
   }
 
   /**
diff --git a/core/modules/locale/src/StringDatabaseStorage.php b/core/modules/locale/src/StringDatabaseStorage.php
index 8976224b05ba48bff7cda5b776a4cb533e8f6ce1..45bf41d1ff3ceb43681b81dbcb4800e142d12e54 100644
--- a/core/modules/locale/src/StringDatabaseStorage.php
+++ b/core/modules/locale/src/StringDatabaseStorage.php
@@ -22,7 +22,7 @@ class StringDatabaseStorage implements StringStorageInterface {
    *
    * @var array
    */
-  protected $options = array();
+  protected $options = [];
 
   /**
    * Constructs a new StringDatabaseStorage class.
@@ -32,7 +32,7 @@ class StringDatabaseStorage implements StringStorageInterface {
    * @param array $options
    *   (optional) Any additional database connection options to use in queries.
    */
-  public function __construct(Connection $connection, array $options = array()) {
+  public function __construct(Connection $connection, array $options = []) {
     $this->connection = $connection;
     $this->options = $options;
   }
@@ -40,15 +40,15 @@ public function __construct(Connection $connection, array $options = array()) {
   /**
    * {@inheritdoc}
    */
-  public function getStrings(array $conditions = array(), array $options = array()) {
+  public function getStrings(array $conditions = [], array $options = []) {
     return $this->dbStringLoad($conditions, $options, 'Drupal\locale\SourceString');
   }
 
   /**
    * {@inheritdoc}
    */
-  public function getTranslations(array $conditions = array(), array $options = array()) {
-    return $this->dbStringLoad($conditions, array('translation' => TRUE) + $options, 'Drupal\locale\TranslationString');
+  public function getTranslations(array $conditions = [], array $options = []) {
+    return $this->dbStringLoad($conditions, ['translation' => TRUE] + $options, 'Drupal\locale\TranslationString');
   }
 
   /**
@@ -70,7 +70,7 @@ public function findString(array $conditions) {
    * {@inheritdoc}
    */
   public function findTranslation(array $conditions) {
-    $values = $this->dbStringSelect($conditions, array('translation' => TRUE))
+    $values = $this->dbStringSelect($conditions, ['translation' => TRUE])
       ->execute()
       ->fetchAssoc();
 
@@ -85,7 +85,7 @@ public function findTranslation(array $conditions) {
   /**
    * {@inheritdoc}
    */
-  public function getLocations(array $conditions = array()) {
+  public function getLocations(array $conditions = []) {
     $query = $this->connection->select('locales_location', 'l', $this->options)
       ->fields('l');
     foreach ($conditions as $field => $value) {
@@ -143,14 +143,14 @@ protected function updateLocation($string) {
           // Make sure that the name isn't longer than 255 characters.
           $name = substr($name, 0, 255);
           if (!$lid) {
-            $this->dbDelete('locales_location', array('sid' => $string->getId(), 'type' => $type, 'name' => $name))
+            $this->dbDelete('locales_location', ['sid' => $string->getId(), 'type' => $type, 'name' => $name])
               ->execute();
           }
           elseif ($lid === TRUE) {
             // This is a new location to add, take care not to duplicate.
             $this->connection->merge('locales_location', $this->options)
-              ->keys(array('sid' => $string->getId(), 'type' => $type, 'name' => $name))
-              ->fields(array('version' => \Drupal::VERSION))
+              ->keys(['sid' => $string->getId(), 'type' => $type, 'name' => $name])
+              ->fields(['version' => \Drupal::VERSION])
               ->execute();
             $created = TRUE;
           }
@@ -177,7 +177,7 @@ protected function checkVersion($string, $version) {
       $string->setVersion($version);
       $this->connection->update('locales_source', $this->options)
         ->condition('lid', $string->getId())
-        ->fields(array('version' => $version))
+        ->fields(['version' => $version])
         ->execute();
     }
   }
@@ -204,11 +204,11 @@ public function delete($string) {
    * {@inheritdoc}
    */
   public function deleteStrings($conditions) {
-    $lids = $this->dbStringSelect($conditions, array('fields' => array('lid')))->execute()->fetchCol();
+    $lids = $this->dbStringSelect($conditions, ['fields' => ['lid']])->execute()->fetchCol();
     if ($lids) {
-      $this->dbDelete('locales_target', array('lid' => $lids))->execute();
-      $this->dbDelete('locales_source', array('lid' => $lids))->execute();
-      $this->dbDelete('locales_location', array('sid' => $lids))->execute();
+      $this->dbDelete('locales_target', ['lid' => $lids])->execute();
+      $this->dbDelete('locales_source', ['lid' => $lids])->execute();
+      $this->dbDelete('locales_location', ['sid' => $lids])->execute();
     }
   }
 
@@ -222,18 +222,18 @@ public function deleteTranslations($conditions) {
   /**
    * {@inheritdoc}
    */
-  public function createString($values = array()) {
-    return new SourceString($values + array('storage' => $this));
+  public function createString($values = []) {
+    return new SourceString($values + ['storage' => $this]);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function createTranslation($values = array()) {
-    return new TranslationString($values + array(
+  public function createTranslation($values = []) {
+    return new TranslationString($values + [
       'storage' => $this,
       'is_new' => TRUE,
-    ));
+    ]);
   }
 
   /**
@@ -251,10 +251,10 @@ public function createTranslation($values = array()) {
    *     table fields)
    */
   protected function dbFieldTable($field) {
-    if (in_array($field, array('language', 'translation', 'customized'))) {
+    if (in_array($field, ['language', 'translation', 'customized'])) {
       return 't';
     }
-    elseif (in_array($field, array('type', 'name'))) {
+    elseif (in_array($field, ['type', 'name'])) {
       return 'l';
     }
     else {
@@ -291,16 +291,16 @@ protected function dbStringTable($string) {
    */
   protected function dbStringKeys($string) {
     if ($string->isSource()) {
-      $keys = array('lid');
+      $keys = ['lid'];
     }
     elseif ($string->isTranslation()) {
-      $keys = array('lid', 'language');
+      $keys = ['lid', 'language'];
     }
     if (!empty($keys) && ($values = $string->getValues($keys)) && count($keys) == count($values)) {
       return $values;
     }
     else {
-      return array();
+      return [];
     }
   }
 
@@ -318,7 +318,7 @@ protected function dbStringKeys($string) {
    *   Array of objects of the class requested.
    */
   protected function dbStringLoad(array $conditions, array $options, $class) {
-    $strings = array();
+    $strings = [];
     $result = $this->dbStringSelect($conditions, $options)->execute();
     foreach ($result as $item) {
       /** @var \Drupal\locale\StringInterface $string */
@@ -350,7 +350,7 @@ protected function dbStringLoad(array $conditions, array $options, $class) {
    * @return \Drupal\Core\Database\Query\Select
    *   Query object with all the tables, fields and conditions.
    */
-  protected function dbStringSelect(array $conditions, array $options = array()) {
+  protected function dbStringSelect(array $conditions, array $options = []) {
     // Start building the query with source table and check whether we need to
     // join the target table too.
     $query = $this->connection->select('locales_source', 's', $this->options)
@@ -377,9 +377,9 @@ protected function dbStringSelect(array $conditions, array $options = array()) {
     if ($join) {
       if (isset($conditions['language'])) {
         // If we've got a language condition, we use it for the join.
-        $query->$join('locales_target', 't', "t.lid = s.lid AND t.language = :langcode", array(
+        $query->$join('locales_target', 't', "t.lid = s.lid AND t.language = :langcode", [
           ':langcode' => $conditions['language'],
-        ));
+        ]);
         unset($conditions['language']);
       }
       else {
@@ -388,7 +388,7 @@ protected function dbStringSelect(array $conditions, array $options = array()) {
       }
       if (!empty($options['translation'])) {
         // We cannot just add all fields because 'lid' may get null values.
-        $query->fields('t', array('language', 'translation', 'customized'));
+        $query->fields('t', ['language', 'translation', 'customized']);
       }
     }
 
@@ -397,8 +397,8 @@ protected function dbStringSelect(array $conditions, array $options = array()) {
     // array so we can consistently use IN conditions.
     if (isset($conditions['type']) || isset($conditions['name'])) {
       $subquery = $this->connection->select('locales_location', 'l', $this->options)
-        ->fields('l', array('sid'));
-      foreach (array('type', 'name') as $field) {
+        ->fields('l', ['sid']);
+      foreach (['type', 'name'] as $field) {
         if (isset($conditions[$field])) {
           $subquery->condition('l.' . $field, (array) $conditions[$field], 'IN');
           unset($conditions[$field]);
@@ -464,12 +464,12 @@ protected function dbStringSelect(array $conditions, array $options = array()) {
    */
   protected function dbStringInsert($string) {
     if ($string->isSource()) {
-      $string->setValues(array('context' => '', 'version' => 'none'), FALSE);
-      $fields = $string->getValues(array('source', 'context', 'version'));
+      $string->setValues(['context' => '', 'version' => 'none'], FALSE);
+      $fields = $string->getValues(['source', 'context', 'version']);
     }
     elseif ($string->isTranslation()) {
-      $string->setValues(array('customized' => 0), FALSE);
-      $fields = $string->getValues(array('lid', 'language', 'translation', 'customized'));
+      $string->setValues(['customized' => 0], FALSE);
+      $fields = $string->getValues(['lid', 'language', 'translation', 'customized']);
     }
     if (!empty($fields)) {
       return $this->connection->insert($this->dbStringTable($string), $this->options)
@@ -496,10 +496,10 @@ protected function dbStringInsert($string) {
    */
   protected function dbStringUpdate($string) {
     if ($string->isSource()) {
-      $values = $string->getValues(array('source', 'context', 'version'));
+      $values = $string->getValues(['source', 'context', 'version']);
     }
     elseif ($string->isTranslation()) {
-      $values = $string->getValues(array('translation', 'customized'));
+      $values = $string->getValues(['translation', 'customized']);
     }
     if (!empty($values) && $keys = $this->dbStringKeys($string)) {
       return $this->connection->merge($this->dbStringTable($string), $this->options)
@@ -534,7 +534,7 @@ protected function dbDelete($table, $keys) {
   /**
    * Executes an arbitrary SELECT query string with the injected options.
    */
-  protected function dbExecute($query, array $args = array()) {
+  protected function dbExecute($query, array $args = []) {
     return $this->connection->query($query, $args, $this->options);
   }
 
diff --git a/core/modules/locale/src/StringStorageInterface.php b/core/modules/locale/src/StringStorageInterface.php
index da1c8fb1f0a4da61e0c193f9992ad308de50ba8f..18c5edc2b6947463712e1afadab1d3adccdb3cb8 100644
--- a/core/modules/locale/src/StringStorageInterface.php
+++ b/core/modules/locale/src/StringStorageInterface.php
@@ -27,7 +27,7 @@ interface StringStorageInterface {
    * @return array
    *   Array of \Drupal\locale\StringInterface objects matching the conditions.
    */
-  public function getStrings(array $conditions = array(), array $options = array());
+  public function getStrings(array $conditions = [], array $options = []);
 
   /**
    * Loads multiple string translation objects.
@@ -44,7 +44,7 @@ public function getStrings(array $conditions = array(), array $options = array()
    *
    * @see \Drupal\locale\StringStorageInterface::getStrings()
    */
-  public function getTranslations(array $conditions = array(), array $options = array());
+  public function getTranslations(array $conditions = [], array $options = []);
 
   /**
    * Loads string location information.
@@ -61,7 +61,7 @@ public function getTranslations(array $conditions = array(), array $options = ar
    *
    * @see \Drupal\locale\StringStorageInterface::getStrings()
    */
-  public function getLocations(array $conditions = array());
+  public function getLocations(array $conditions = []);
 
   /**
    * Loads a string source object, fast query.
@@ -164,7 +164,7 @@ public function countTranslations();
    * @return \Drupal\locale\SourceString
    *   New source string object.
    */
-  public function createString($values = array());
+  public function createString($values = []);
 
   /**
    * Creates a string translation object bound to this storage but not saved.
@@ -175,6 +175,6 @@ public function createString($values = array());
    * @return \Drupal\locale\TranslationString
    *   New string translation object.
    */
-  public function createTranslation($values = array());
+  public function createTranslation($values = []);
 
 }
diff --git a/core/modules/locale/src/Tests/LocaleConfigTranslationImportTest.php b/core/modules/locale/src/Tests/LocaleConfigTranslationImportTest.php
index 9ad620fcf44cdb9eb843bab1e8a5f1c07b0655ca..9e80c7bce42c1a3fd39c7e1c09df631c607b594b 100644
--- a/core/modules/locale/src/Tests/LocaleConfigTranslationImportTest.php
+++ b/core/modules/locale/src/Tests/LocaleConfigTranslationImportTest.php
@@ -18,13 +18,13 @@ class LocaleConfigTranslationImportTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'locale_test_translate');
+  public static $modules = ['language', 'locale_test_translate'];
 
   /**
    * Test update changes configuration translations if enabled after language.
    */
   public function testConfigTranslationImport() {
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'administer permissions'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'administer permissions']);
     $this->drupalLogin($admin_user);
 
     // Add a language. The Afrikaans translation file of locale_test_translate
@@ -32,7 +32,7 @@ public function testConfigTranslationImport() {
     ConfigurableLanguage::createFromLangcode('af')->save();
 
     // Enable locale module.
-    $this->container->get('module_installer')->install(array('locale'));
+    $this->container->get('module_installer')->install(['locale']);
     $this->resetAll();
 
     // Enable import of translations. By default this is disabled for automated
@@ -42,9 +42,9 @@ public function testConfigTranslationImport() {
       ->save();
 
     // Add translation permissions now that the locale module has been enabled.
-    $edit = array(
+    $edit = [
       'authenticated[translate interface]' => 'translate interface',
-    );
+    ];
     $this->drupalPostForm('admin/people/permissions', $edit, t('Save permissions'));
 
     // Check and update the translation status. This will import the Afrikaans
@@ -57,7 +57,7 @@ public function testConfigTranslationImport() {
     $status['drupal']['af']->type = 'current';
     \Drupal::state()->set('locale.translation_status', $status);
 
-    $this->drupalPostForm('admin/reports/translations', array(), t('Update translations'));
+    $this->drupalPostForm('admin/reports/translations', [], t('Update translations'));
 
     // Check if configuration translations have been imported.
     $override = \Drupal::languageManager()->getLanguageConfigOverride('af', 'system.maintenance');
@@ -77,7 +77,7 @@ public function testConfigTranslationModuleInstall() {
     // import. Test that this override is in place.
     $this->assertFalse($this->config('locale.settings')->get('translation.import_enabled'), 'Translations imports are disabled by default in the Testing profile.');
 
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'administer permissions', 'translate configuration'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'administer permissions', 'translate configuration']);
     $this->drupalLogin($admin_user);
 
     // Enable import of translations. By default this is disabled for automated
@@ -90,7 +90,7 @@ public function testConfigTranslationModuleInstall() {
     $this->drupalPostForm('admin/config/regional/language/add', ['predefined_langcode' => 'af'], t('Add language'));
 
     // Add the system branding block to the page.
-    $this->drupalPlaceBlock('system_branding_block', array('region' => 'header', 'id' => 'site-branding'));
+    $this->drupalPlaceBlock('system_branding_block', ['region' => 'header', 'id' => 'site-branding']);
     $this->drupalPostForm('admin/config/system/site-information', ['site_slogan' => 'Test site slogan'], 'Save configuration');
     $this->drupalPostForm('admin/config/system/site-information/translate/af/edit', ['translation[config_names][system.site][slogan]' => 'Test site slogan in Afrikaans'], 'Save translation');
 
@@ -135,7 +135,7 @@ function testLocaleRemovalAndConfigOverrideDelete() {
     $this->container->get('module_installer')->install(['locale']);
     $this->resetAll();
 
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'administer permissions', 'translate interface'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'administer permissions', 'translate interface']);
     $this->drupalLogin($admin_user);
 
     // Enable import of translations. By default this is disabled for automated
@@ -153,7 +153,7 @@ function testLocaleRemovalAndConfigOverrideDelete() {
     // Remove the string from translation to simulate a Locale removal. Note
     // that is no current way of doing this in the UI.
     $locale_storage = \Drupal::service('locale.storage');
-    $string = $locale_storage->findString(array('source' => 'Locale can translate'));
+    $string = $locale_storage->findString(['source' => 'Locale can translate']);
     \Drupal::service('locale.storage')->delete($string);
     // Force a rebuild of config translations.
     $count = Locale::config()->updateConfigTranslations(['locale_test_translate.settings'], ['af']);
@@ -172,7 +172,7 @@ function testLocaleRemovalAndConfigOverridePreserve() {
     $this->container->get('module_installer')->install(['locale']);
     $this->resetAll();
 
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'administer permissions', 'translate interface'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'administer permissions', 'translate interface']);
     $this->drupalLogin($admin_user);
 
     // Enable import of translations. By default this is disabled for automated
@@ -198,18 +198,18 @@ function testLocaleRemovalAndConfigOverridePreserve() {
     $this->assertEqual($expected, $override->get());
 
     // Set the translated string to empty.
-    $search = array(
+    $search = [
       'string' => 'Locale can translate',
       'langcode' => 'af',
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textareas = $this->xpath('//textarea');
     $textarea = current($textareas);
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => '',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     $override = \Drupal::languageManager()->getLanguageConfigOverride('af', 'locale_test_translate.settings');
diff --git a/core/modules/locale/src/Tests/LocaleConfigTranslationTest.php b/core/modules/locale/src/Tests/LocaleConfigTranslationTest.php
index 271f6e2f373a2e85dfbf136651dff51696d7999d..a90dce0c54c8ff3bc3b1c995a4bf3376a62d551c 100644
--- a/core/modules/locale/src/Tests/LocaleConfigTranslationTest.php
+++ b/core/modules/locale/src/Tests/LocaleConfigTranslationTest.php
@@ -24,7 +24,7 @@ class LocaleConfigTranslationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale', 'contact', 'contact_test');
+  public static $modules = ['locale', 'contact', 'contact_test'];
 
   /**
    * {@inheritdoc}
@@ -42,15 +42,15 @@ protected function setUp() {
 
     // Add custom language.
     $this->langcode = 'xx';
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages', 'translate interface', 'administer modules', 'access site-wide contact form', 'administer contact forms', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages', 'translate interface', 'administer modules', 'access site-wide contact form', 'administer contact forms', 'administer site configuration']);
     $this->drupalLogin($admin_user);
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $this->langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     // Set path prefix.
     $edit = ["prefix[$this->langcode]" => $this->langcode];
@@ -63,23 +63,23 @@ protected function setUp() {
   public function testConfigTranslation() {
     // Check that the maintenance message exists and create translation for it.
     $source = '@site is currently under maintenance. We should be back shortly. Thank you for your patience.';
-    $string = $this->storage->findString(array('source' => $source, 'context' => '', 'type' => 'configuration'));
+    $string = $this->storage->findString(['source' => $source, 'context' => '', 'type' => 'configuration']);
     $this->assertTrue($string, 'Configuration strings have been created upon installation.');
 
     // Translate using the UI so configuration is refreshed.
     $message = $this->randomMachineName(20);
-    $search = array(
+    $search = [
       'string' => $string->source,
       'langcode' => $this->langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textareas = $this->xpath('//textarea');
     $textarea = current($textareas);
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $message,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Get translation and check we've only got the message.
@@ -88,22 +88,22 @@ public function testConfigTranslation() {
     $this->assertEqual($translation['message'], $message);
 
     // Check default medium date format exists and create a translation for it.
-    $string = $this->storage->findString(array('source' => 'D, m/d/Y - H:i', 'context' => 'PHP date format', 'type' => 'configuration'));
+    $string = $this->storage->findString(['source' => 'D, m/d/Y - H:i', 'context' => 'PHP date format', 'type' => 'configuration']);
     $this->assertTrue($string, 'Configuration date formats have been created upon installation.');
 
     // Translate using the UI so configuration is refreshed.
-    $search = array(
+    $search = [
       'string' => $string->source,
       'langcode' => $this->langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textareas = $this->xpath('//textarea');
     $textarea = current($textareas);
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => 'D',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     $translation = \Drupal::languageManager()->getLanguageConfigOverride($this->langcode, 'core.date_format.medium')->get();
@@ -115,14 +115,14 @@ public function testConfigTranslation() {
     $this->assertEqual($formatted_date, 'Tue', 'Got the right formatted date using the date format translation pattern.');
 
     // Assert strings from image module config are not available.
-    $string = $this->storage->findString(array('source' => 'Medium (220×220)', 'context' => '', 'type' => 'configuration'));
+    $string = $this->storage->findString(['source' => 'Medium (220×220)', 'context' => '', 'type' => 'configuration']);
     $this->assertFalse($string, 'Configuration strings have been created upon installation.');
 
     // Enable the image module.
-    $this->drupalPostForm('admin/modules', array('modules[image][enable]' => "1"), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[image][enable]' => "1"], t('Install'));
     $this->rebuildContainer();
 
-    $string = $this->storage->findString(array('source' => 'Medium (220×220)', 'context' => '', 'type' => 'configuration'));
+    $string = $this->storage->findString(['source' => 'Medium (220×220)', 'context' => '', 'type' => 'configuration']);
     $this->assertTrue($string, 'Configuration strings have been created upon installation.');
     $locations = $string->getLocations();
     $this->assertTrue(isset($locations['configuration']) && isset($locations['configuration']['image.style.medium']), 'Configuration string has been created with the right location');
@@ -136,17 +136,17 @@ public function testConfigTranslation() {
 
     // Translate using the UI so configuration is refreshed.
     $image_style_label = $this->randomMachineName(20);
-    $search = array(
+    $search = [
       'string' => $string->source,
       'langcode' => $this->langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $image_style_label,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Check the right single translation has been created.
@@ -159,8 +159,8 @@ public function testConfigTranslation() {
     $this->assertEqual($translation['label'], $image_style_label, 'Got the right translation for image style name after translation');
 
     // Uninstall the module.
-    $this->drupalPostForm('admin/modules/uninstall', array('uninstall[image]' => "image"), t('Uninstall'));
-    $this->drupalPostForm(NULL, array(), t('Uninstall'));
+    $this->drupalPostForm('admin/modules/uninstall', ['uninstall[image]' => "image"], t('Uninstall'));
+    $this->drupalPostForm(NULL, [], t('Uninstall'));
 
     // Ensure that the translated configuration has been removed.
     $override = \Drupal::languageManager()->getLanguageConfigOverride('xx', 'image.style.medium');
@@ -168,17 +168,17 @@ public function testConfigTranslation() {
 
     // Translate default category using the UI so configuration is refreshed.
     $category_label = $this->randomMachineName(20);
-    $search = array(
+    $search = [
       'string' => 'Website feedback',
       'langcode' => $this->langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $category_label,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Check if this category displayed in this language will use the
diff --git a/core/modules/locale/src/Tests/LocaleExportTest.php b/core/modules/locale/src/Tests/LocaleExportTest.php
index f9cd2ea7ce427f0219e7ebfa84ee4674df240d1a..54d36e2bc80c123759a94e1a5a1dc054b1f9111f 100644
--- a/core/modules/locale/src/Tests/LocaleExportTest.php
+++ b/core/modules/locale/src/Tests/LocaleExportTest.php
@@ -16,7 +16,7 @@ class LocaleExportTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale');
+  public static $modules = ['locale'];
 
   /**
    * A user able to create languages and export translations.
@@ -29,7 +29,7 @@ class LocaleExportTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer languages', 'translate interface', 'access administration pages'));
+    $this->adminUser = $this->drupalCreateUser(['administer languages', 'translate interface', 'access administration pages']);
     $this->drupalLogin($this->adminUser);
 
     // Copy test po files to the translations directory.
@@ -45,16 +45,16 @@ public function testExportTranslation() {
     // This will also automatically add the 'fr' language.
     $name = \Drupal::service('file_system')->tempnam('temporary://', "po_") . '.po';
     file_put_contents($name, $this->getPoFile());
-    $this->drupalPostForm('admin/config/regional/translate/import', array(
+    $this->drupalPostForm('admin/config/regional/translate/import', [
       'langcode' => 'fr',
       'files[file]' => $name,
-    ), t('Import'));
+    ], t('Import'));
     drupal_unlink($name);
 
     // Get the French translations.
-    $this->drupalPostForm('admin/config/regional/translate/export', array(
+    $this->drupalPostForm('admin/config/regional/translate/export', [
       'langcode' => 'fr',
-    ), t('Export'));
+    ], t('Export'));
 
     // Ensure we have a translation file.
     $this->assertRaw('# French translation of Drupal', 'Exported French translation file.');
@@ -64,11 +64,11 @@ public function testExportTranslation() {
     // Import some more French translations which will be marked as customized.
     $name = \Drupal::service('file_system')->tempnam('temporary://', "po2_") . '.po';
     file_put_contents($name, $this->getCustomPoFile());
-    $this->drupalPostForm('admin/config/regional/translate/import', array(
+    $this->drupalPostForm('admin/config/regional/translate/import', [
       'langcode' => 'fr',
       'files[file]' => $name,
       'customized' => 1,
-    ), t('Import'));
+    ], t('Import'));
     drupal_unlink($name);
 
     // Create string without translation in the locales_source table.
@@ -79,12 +79,12 @@ public function testExportTranslation() {
       ->save();
 
     // Export only customized French translations.
-    $this->drupalPostForm('admin/config/regional/translate/export', array(
+    $this->drupalPostForm('admin/config/regional/translate/export', [
       'langcode' => 'fr',
       'content_options[not_customized]' => FALSE,
       'content_options[customized]' => TRUE,
       'content_options[not_translated]' => FALSE,
-    ), t('Export'));
+    ], t('Export'));
 
     // Ensure we have a translation file.
     $this->assertRaw('# French translation of Drupal', 'Exported French translation file with only customized strings.');
@@ -94,12 +94,12 @@ public function testExportTranslation() {
     $this->assertNoRaw('msgid "February"', 'Untranslated string not present in exported file.');
 
     // Export only untranslated French translations.
-    $this->drupalPostForm('admin/config/regional/translate/export', array(
+    $this->drupalPostForm('admin/config/regional/translate/export', [
       'langcode' => 'fr',
       'content_options[not_customized]' => FALSE,
       'content_options[customized]' => FALSE,
       'content_options[not_translated]' => TRUE,
-    ), t('Export'));
+    ], t('Export'));
 
     // Ensure we have a translation file.
     $this->assertRaw('# French translation of Drupal', 'Exported French translation file with only untranslated strings.');
@@ -118,7 +118,7 @@ public function testExportTranslationTemplateFile() {
     // the locales_source table gets populated with something.
     $this->drupalGet('admin/config/regional/language');
     // Get the translation template file.
-    $this->drupalPostForm('admin/config/regional/translate/export', array(), t('Export'));
+    $this->drupalPostForm('admin/config/regional/translate/export', [], t('Export'));
     // Ensure we have a translation file.
     $this->assertRaw('# LANGUAGE translation of PROJECT', 'Exported translation template file.');
   }
diff --git a/core/modules/locale/src/Tests/LocaleFileSystemFormTest.php b/core/modules/locale/src/Tests/LocaleFileSystemFormTest.php
index 1e417552e15ae72bbb31abb1e086bff83c780d24..e25ec4095f40f4e3219b06f20b6d995eebe0bc6a 100644
--- a/core/modules/locale/src/Tests/LocaleFileSystemFormTest.php
+++ b/core/modules/locale/src/Tests/LocaleFileSystemFormTest.php
@@ -16,14 +16,14 @@ class LocaleFileSystemFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp(){
     parent::setUp();
-    $account = $this->drupalCreateUser(array('administer site configuration'));
+    $account = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($account);
   }
 
@@ -44,9 +44,9 @@ function testFileConfigurationPage() {
 
     // The setting should persist.
     $translation_path = $this->publicFilesDirectory . '/translations_changed';
-    $fields = array(
+    $fields = [
       'translation_path' => $translation_path
-    );
+    ];
     $this->drupalPostForm(NULL, $fields, t('Save configuration'));
     $this->drupalGet('admin/config/media/file-system');
     $this->assertFieldByName('translation_path', $translation_path);
diff --git a/core/modules/locale/src/Tests/LocaleImportFunctionalTest.php b/core/modules/locale/src/Tests/LocaleImportFunctionalTest.php
index 7fb93d9309f6c3726f8a0213cabb1c691e0168c5..c1d9a612a9c93d5383b4f79bea453cf1b83c5631 100644
--- a/core/modules/locale/src/Tests/LocaleImportFunctionalTest.php
+++ b/core/modules/locale/src/Tests/LocaleImportFunctionalTest.php
@@ -17,7 +17,7 @@ class LocaleImportFunctionalTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale', 'dblog');
+  public static $modules = ['locale', 'dblog'];
 
   /**
    * A user able to create languages and import translations.
@@ -44,8 +44,8 @@ protected function setUp() {
     file_unmanaged_copy(__DIR__ . '/../../tests/test.de.po', 'translations://', FILE_EXISTS_REPLACE);
     file_unmanaged_copy(__DIR__ . '/../../tests/test.xx.po', 'translations://', FILE_EXISTS_REPLACE);
 
-    $this->adminUser = $this->drupalCreateUser(array('administer languages', 'translate interface', 'access administration pages'));
-    $this->adminUserAccessSiteReports = $this->drupalCreateUser(array('administer languages', 'translate interface', 'access administration pages', 'access site reports'));
+    $this->adminUser = $this->drupalCreateUser(['administer languages', 'translate interface', 'access administration pages']);
+    $this->adminUserAccessSiteReports = $this->drupalCreateUser(['administer languages', 'translate interface', 'access administration pages', 'access site reports']);
     $this->drupalLogin($this->adminUser);
 
     // Enable import of translations. By default this is disabled for automated
@@ -60,15 +60,15 @@ protected function setUp() {
    */
   public function testStandalonePoFile() {
     // Try importing a .po file.
-    $this->importPoFile($this->getPoFile(), array(
+    $this->importPoFile($this->getPoFile(), [
       'langcode' => 'fr',
-    ));
+    ]);
     $this->config('locale.settings');
     // The import should automatically create the corresponding language.
-    $this->assertRaw(t('The language %language has been created.', array('%language' => 'French')), 'The language has been automatically created.');
+    $this->assertRaw(t('The language %language has been created.', ['%language' => 'French']), 'The language has been automatically created.');
 
     // The import should have created 8 strings.
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 8, '%update' => 0, '%delete' => 0)), 'The translation file was successfully imported.');
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 8, '%update' => 0, '%delete' => 0]), 'The translation file was successfully imported.');
 
     // This import should have saved plural forms to have 2 variants.
     $locale_plurals = \Drupal::service('locale.plural.formula')->getNumberOfPlurals('fr');
@@ -78,14 +78,14 @@ public function testStandalonePoFile() {
     $this->assertUrl(\Drupal::url('locale.translate_page', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
 
     // Try importing a .po file with invalid tags.
-    $this->importPoFile($this->getBadPoFile(), array(
+    $this->importPoFile($this->getBadPoFile(), [
       'langcode' => 'fr',
-    ));
+    ]);
 
     // The import should have created 1 string and rejected 2.
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 1, '%update' => 0, '%delete' => 0)), 'The translation file was successfully imported.');
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 1, '%update' => 0, '%delete' => 0]), 'The translation file was successfully imported.');
 
-    $skip_message = \Drupal::translation()->formatPlural(2, 'One translation string was skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', '@count translation strings were skipped because of disallowed or malformed HTML. See the log for details.', array(':url' => \Drupal::url('dblog.overview')));
+    $skip_message = \Drupal::translation()->formatPlural(2, 'One translation string was skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', '@count translation strings were skipped because of disallowed or malformed HTML. See the log for details.', [':url' => \Drupal::url('dblog.overview')]);
     $this->assertRaw($skip_message, 'Unsafe strings were skipped.');
 
     // Repeat the process with a user that can access site reports, and this
@@ -93,19 +93,19 @@ public function testStandalonePoFile() {
     $this->drupalLogin($this->adminUserAccessSiteReports);
 
     // Try importing a .po file with invalid tags.
-    $this->importPoFile($this->getBadPoFile(), array(
+    $this->importPoFile($this->getBadPoFile(), [
       'langcode' => 'fr',
-    ));
+    ]);
 
-    $skip_message = \Drupal::translation()->formatPlural(2, 'One translation string was skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', '@count translation strings were skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', array(':url' => \Drupal::url('dblog.overview')));
+    $skip_message = \Drupal::translation()->formatPlural(2, 'One translation string was skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', '@count translation strings were skipped because of disallowed or malformed HTML. <a href=":url">See the log</a> for details.', [':url' => \Drupal::url('dblog.overview')]);
     $this->assertRaw($skip_message, 'Unsafe strings were skipped.');
 
     // Check empty files import with a user that cannot access site reports..
     $this->drupalLogin($this->adminUser);
     // Try importing a zero byte sized .po file.
-    $this->importPoFile($this->getEmptyPoFile(), array(
+    $this->importPoFile($this->getEmptyPoFile(), [
       'langcode' => 'fr',
-    ));
+    ]);
     // The import should have created 0 string and rejected 0.
     $this->assertRaw(t('One translation file could not be imported. See the log for details.'), 'The empty translation file import reported no translations imported.');
 
@@ -113,35 +113,35 @@ public function testStandalonePoFile() {
     // time the different warnings must contain links to the log.
     $this->drupalLogin($this->adminUserAccessSiteReports);
     // Try importing a zero byte sized .po file.
-    $this->importPoFile($this->getEmptyPoFile(), array(
+    $this->importPoFile($this->getEmptyPoFile(), [
       'langcode' => 'fr',
-    ));
+    ]);
     // The import should have created 0 string and rejected 0.
-    $this->assertRaw(t('One translation file could not be imported. <a href=":url">See the log</a> for details.', array(':url' => \Drupal::url('dblog.overview'))), 'The empty translation file import reported no translations imported.');
+    $this->assertRaw(t('One translation file could not be imported. <a href=":url">See the log</a> for details.', [':url' => \Drupal::url('dblog.overview')]), 'The empty translation file import reported no translations imported.');
 
     // Try importing a .po file which doesn't exist.
     $name = $this->randomMachineName(16);
-    $this->drupalPostForm('admin/config/regional/translate/import', array(
+    $this->drupalPostForm('admin/config/regional/translate/import', [
       'langcode' => 'fr',
       'files[file]' => $name,
-    ), t('Import'));
+    ], t('Import'));
     $this->assertUrl(\Drupal::url('locale.translate_import', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
     $this->assertText(t('File to import not found.'), 'File to import not found message.');
 
     // Try importing a .po file with overriding strings, and ensure existing
     // strings are kept.
-    $this->importPoFile($this->getOverwritePoFile(), array(
+    $this->importPoFile($this->getOverwritePoFile(), [
       'langcode' => 'fr',
-    ));
+    ]);
 
     // The import should have created 1 string.
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 1, '%update' => 0, '%delete' => 0)), 'The translation file was successfully imported.');
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 1, '%update' => 0, '%delete' => 0]), 'The translation file was successfully imported.');
     // Ensure string wasn't overwritten.
-    $search = array(
+    $search = [
       'string' => 'Montag',
       'langcode' => 'fr',
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText(t('No strings available.'), 'String not overwritten by imported string.');
 
@@ -151,19 +151,19 @@ public function testStandalonePoFile() {
 
     // Try importing a .po file with overriding strings, and ensure existing
     // strings are overwritten.
-    $this->importPoFile($this->getOverwritePoFile(), array(
+    $this->importPoFile($this->getOverwritePoFile(), [
       'langcode' => 'fr',
       'overwrite_options[not_customized]' => TRUE,
-    ));
+    ]);
 
     // The import should have updated 2 strings.
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 0, '%update' => 2, '%delete' => 0)), 'The translation file was successfully imported.');
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 0, '%update' => 2, '%delete' => 0]), 'The translation file was successfully imported.');
     // Ensure string was overwritten.
-    $search = array(
+    $search = [
       'string' => 'Montag',
       'langcode' => 'fr',
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertNoText(t('No strings available.'), 'String overwritten by imported string.');
     // This import should have changed number of plural forms.
@@ -171,54 +171,54 @@ public function testStandalonePoFile() {
     $this->assertEqual(3, $locale_plurals, 'Plural numbers changed.');
 
     // Importing a .po file and mark its strings as customized strings.
-    $this->importPoFile($this->getCustomPoFile(), array(
+    $this->importPoFile($this->getCustomPoFile(), [
       'langcode' => 'fr',
       'customized' => TRUE,
-    ));
+    ]);
 
     // The import should have created 6 strings.
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 6, '%update' => 0, '%delete' => 0)), 'The customized translation file was successfully imported.');
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 6, '%update' => 0, '%delete' => 0]), 'The customized translation file was successfully imported.');
 
     // The database should now contain 6 customized strings (two imported
     // strings are not translated).
-    $count = db_query('SELECT COUNT(*) FROM {locales_target} WHERE customized = :custom', array(':custom' => 1))->fetchField();
+    $count = db_query('SELECT COUNT(*) FROM {locales_target} WHERE customized = :custom', [':custom' => 1])->fetchField();
     $this->assertEqual($count, 6, 'Customized translations successfully imported.');
 
     // Try importing a .po file with overriding strings, and ensure existing
     // customized strings are kept.
-    $this->importPoFile($this->getCustomOverwritePoFile(), array(
+    $this->importPoFile($this->getCustomOverwritePoFile(), [
       'langcode' => 'fr',
       'overwrite_options[not_customized]' => TRUE,
       'overwrite_options[customized]' => FALSE,
-    ));
+    ]);
 
     // The import should have created 1 string.
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 1, '%update' => 0, '%delete' => 0)), 'The customized translation file was successfully imported.');
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 1, '%update' => 0, '%delete' => 0]), 'The customized translation file was successfully imported.');
     // Ensure string wasn't overwritten.
-    $search = array(
+    $search = [
       'string' => 'januari',
       'langcode' => 'fr',
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText(t('No strings available.'), 'Customized string not overwritten by imported string.');
 
     // Try importing a .po file with overriding strings, and ensure existing
     // customized strings are overwritten.
-    $this->importPoFile($this->getCustomOverwritePoFile(), array(
+    $this->importPoFile($this->getCustomOverwritePoFile(), [
       'langcode' => 'fr',
       'overwrite_options[not_customized]' => FALSE,
       'overwrite_options[customized]' => TRUE,
-    ));
+    ]);
 
     // The import should have updated 2 strings.
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 0, '%update' => 2, '%delete' => 0)), 'The customized translation file was successfully imported.');
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 0, '%update' => 2, '%delete' => 0]), 'The customized translation file was successfully imported.');
     // Ensure string was overwritten.
-    $search = array(
+    $search = [
       'string' => 'januari',
       'langcode' => 'fr',
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertNoText(t('No strings available.'), 'Customized string overwritten by imported string.');
 
@@ -229,14 +229,14 @@ public function testStandalonePoFile() {
    */
   public function testLanguageContext() {
     // Try importing a .po file.
-    $this->importPoFile($this->getPoFileWithContext(), array(
+    $this->importPoFile($this->getPoFileWithContext(), [
       'langcode' => 'hr',
-    ));
+    ]);
 
     // We cast the return value of t() to string so as to retrieve the
     // translated value, rendered as a string.
-    $this->assertIdentical((string) t('May', array(), array('langcode' => 'hr', 'context' => 'Long month name')), 'Svibanj', 'Long month name context is working.');
-    $this->assertIdentical((string) t('May', array(), array('langcode' => 'hr')), 'Svi.', 'Default context is working.');
+    $this->assertIdentical((string) t('May', [], ['langcode' => 'hr', 'context' => 'Long month name']), 'Svibanj', 'Long month name context is working.');
+    $this->assertIdentical((string) t('May', [], ['langcode' => 'hr']), 'Svi.', 'Default context is working.');
   }
 
   /**
@@ -246,26 +246,26 @@ public function testEmptyMsgstr() {
     $langcode = 'hu';
 
     // Try importing a .po file.
-    $this->importPoFile($this->getPoFileWithMsgstr(), array(
+    $this->importPoFile($this->getPoFileWithMsgstr(), [
       'langcode' => $langcode,
-    ));
+    ]);
 
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 1, '%update' => 0, '%delete' => 0)), 'The translation file was successfully imported.');
-    $this->assertIdentical((string) t('Operations', array(), array('langcode' => $langcode)), 'Műveletek', 'String imported and translated.');
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 1, '%update' => 0, '%delete' => 0]), 'The translation file was successfully imported.');
+    $this->assertIdentical((string) t('Operations', [], ['langcode' => $langcode]), 'Műveletek', 'String imported and translated.');
 
     // Try importing a .po file.
-    $this->importPoFile($this->getPoFileWithEmptyMsgstr(), array(
+    $this->importPoFile($this->getPoFileWithEmptyMsgstr(), [
       'langcode' => $langcode,
       'overwrite_options[not_customized]' => TRUE,
-    ));
-    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', array('%number' => 0, '%update' => 0, '%delete' => 1)), 'The translation file was successfully imported.');
+    ]);
+    $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.', ['%number' => 0, '%update' => 0, '%delete' => 1]), 'The translation file was successfully imported.');
 
     $str = "Operations";
-    $search = array(
+    $search = [
       'string' => $str,
       'langcode' => $langcode,
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText($str, 'Search found the string as untranslated.');
   }
@@ -276,27 +276,27 @@ public function testEmptyMsgstr() {
   public function testConfigPoFile() {
     // Values for translations to assert. Config key, original string,
     // translation and config property name.
-    $config_strings = array(
-      'system.maintenance' => array(
+    $config_strings = [
+      'system.maintenance' => [
         '@site is currently under maintenance. We should be back shortly. Thank you for your patience.',
         '@site karbantartás alatt áll. Rövidesen visszatérünk. Köszönjük a türelmet.',
         'message',
-      ),
-      'user.role.anonymous' => array(
+      ],
+      'user.role.anonymous' => [
         'Anonymous user',
         'Névtelen felhasználó',
         'label',
-      ),
-    );
+      ],
+    ];
 
     // Add custom language for testing.
     $langcode = 'xx';
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $this->randomMachineName(16),
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
     // Check for the source strings we are going to translate. Adding the
@@ -304,24 +304,24 @@ public function testConfigPoFile() {
     // strings to interface translation executed.
     $locale_storage = $this->container->get('locale.storage');
     foreach ($config_strings as $config_string) {
-      $string = $locale_storage->findString(array('source' => $config_string[0], 'context' => '', 'type' => 'configuration'));
+      $string = $locale_storage->findString(['source' => $config_string[0], 'context' => '', 'type' => 'configuration']);
       $this->assertTrue($string, 'Configuration strings have been created upon installation.');
     }
 
     // Import a .po file to translate.
-    $this->importPoFile($this->getPoFileWithConfig(), array(
+    $this->importPoFile($this->getPoFileWithConfig(), [
       'langcode' => $langcode,
-    ));
+    ]);
 
     // Translations got recorded in the interface translation system.
     foreach ($config_strings as $config_string) {
-      $search = array(
+      $search = [
         'string' => $config_string[0],
         'langcode' => $langcode,
         'translation' => 'all',
-      );
+      ];
       $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
-      $this->assertText($config_string[1], format_string('Translation of @string found.', array('@string' => $config_string[0])));
+      $this->assertText($config_string[1], format_string('Translation of @string found.', ['@string' => $config_string[0]]));
     }
 
     // Test that translations got recorded in the config system.
@@ -340,8 +340,8 @@ public function testConfigtranslationImportingPoFile() {
     $langcode = 'de';
 
     // Import a .po file to translate.
-    $this->importPoFile($this->getPoFileWithConfigDe(), array(
-      'langcode' => $langcode));
+    $this->importPoFile($this->getPoFileWithConfigDe(), [
+      'langcode' => $langcode]);
 
     // Check that the 'Anonymous' string is translated.
     $config = \Drupal::languageManager()->getLanguageConfigOverride($langcode, 'user.settings');
@@ -353,7 +353,7 @@ public function testConfigtranslationImportingPoFile() {
    */
   public function testCreatedLanguageTranslation() {
     // Import a .po file to add de language.
-    $this->importPoFile($this->getPoFileWithConfigDe(), array('langcode' => 'de'));
+    $this->importPoFile($this->getPoFileWithConfigDe(), ['langcode' => 'de']);
 
     // Get the language.entity.de label and check it's been translated.
     $override = \Drupal::languageManager()->getLanguageConfigOverride('de', 'language.entity.de');
@@ -368,7 +368,7 @@ public function testCreatedLanguageTranslation() {
    * @param array $options
    *   (optional) Additional options to pass to the translation import form.
    */
-  public function importPoFile($contents, array $options = array()) {
+  public function importPoFile($contents, array $options = []) {
     $name = \Drupal::service('file_system')->tempnam('temporary://', "po_") . '.po';
     file_put_contents($name, $contents);
     $options['files[file]'] = $name;
diff --git a/core/modules/locale/src/Tests/LocaleJavascriptTranslationTest.php b/core/modules/locale/src/Tests/LocaleJavascriptTranslationTest.php
index b16ba1889b06231c54d65eb5b894802a30f4a586..fe99ce2f37c424c3680c17dd542616cf4d72ce98 100644
--- a/core/modules/locale/src/Tests/LocaleJavascriptTranslationTest.php
+++ b/core/modules/locale/src/Tests/LocaleJavascriptTranslationTest.php
@@ -18,7 +18,7 @@ class LocaleJavascriptTranslationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale', 'locale_test');
+  public static $modules = ['locale', 'locale_test'];
 
   public function testFileParsing() {
     $filename = __DIR__ . '/../../tests/locale_test.js';
@@ -29,19 +29,19 @@ public function testFileParsing() {
     // Get all of the source strings that were found.
     $strings = $this->container
       ->get('locale.storage')
-      ->getStrings(array(
+      ->getStrings([
         'type' => 'javascript',
         'name' => $filename,
-      ));
+      ]);
 
-    $source_strings = array();
+    $source_strings = [];
     foreach ($strings as $string) {
       $source_strings[$string->source] = $string->context;
     }
 
     $etx = LOCALE_PLURAL_DELIMITER;
     // List of all strings that should be in the file.
-    $test_strings = array(
+    $test_strings = [
       'Standard Call t' => '',
       'Whitespace Call t' => '',
 
@@ -73,11 +73,11 @@ public function testFileParsing() {
       "Context Unquoted plural{$etx}Context Unquoted @count plural" => 'Context string unquoted',
       "Context Single Quoted plural{$etx}Context Single Quoted @count plural" => 'Context string single quoted',
       "Context Double Quoted plural{$etx}Context Double Quoted @count plural" => 'Context string double quoted',
-    );
+    ];
 
     // Assert that all strings were found properly.
     foreach ($test_strings as $str => $context) {
-      $args = array('%source' => $str, '%context' => $context);
+      $args = ['%source' => $str, '%context' => $context];
 
       // Make sure that the string was found in the file.
       $this->assertTrue(isset($source_strings[$str]), SafeMarkup::format('Found source string: %source', $args));
@@ -95,7 +95,7 @@ public function testFileParsing() {
    */
   public function testLocaleTranslationJsDependencies() {
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages', 'translate interface'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages', 'translate interface']);
 
     // Add custom language.
     $this->drupalLogin($admin_user);
@@ -105,16 +105,16 @@ public function testLocaleTranslationJsDependencies() {
     $name = $this->randomMachineName(16);
     // The domain prefix.
     $prefix = $langcode;
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
     // Set path prefix.
-    $edit = array("prefix[$langcode]" => $prefix);
+    $edit = ["prefix[$langcode]" => $prefix];
     $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, t('Save configuration'));
 
     // This forces locale.admin.js string sources to be imported, which contains
@@ -123,11 +123,11 @@ public function testLocaleTranslationJsDependencies() {
 
     // Translate a string in locale.admin.js to our new language.
     $strings = \Drupal::service('locale.storage')
-      ->getStrings(array(
+      ->getStrings([
         'source' => 'Show description',
         'type' => 'javascript',
         'name' => 'core/modules/locale/locale.admin.js',
-      ));
+      ]);
     $string = $strings[0];
 
     $this->drupalPostForm(NULL, ['string' => 'Show description'], t('Filter'));
diff --git a/core/modules/locale/src/Tests/LocaleLibraryAlterTest.php b/core/modules/locale/src/Tests/LocaleLibraryAlterTest.php
index e84e3dd488ce7f9f6fd64623bb41b5cc295a471a..68996f44a20884c3d769769983788fa5af2b0673 100644
--- a/core/modules/locale/src/Tests/LocaleLibraryAlterTest.php
+++ b/core/modules/locale/src/Tests/LocaleLibraryAlterTest.php
@@ -19,7 +19,7 @@ class LocaleLibraryAlterTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale');
+  public static $modules = ['locale'];
 
   /**
    * Verifies that the datepicker can be localized.
diff --git a/core/modules/locale/src/Tests/LocalePluralFormatTest.php b/core/modules/locale/src/Tests/LocalePluralFormatTest.php
index c0e9041f051507a2dd64ab65fdeb978a2748e821..2315dbd22b4d9f63cc560a42e47567b00e11d6d2 100644
--- a/core/modules/locale/src/Tests/LocalePluralFormatTest.php
+++ b/core/modules/locale/src/Tests/LocalePluralFormatTest.php
@@ -24,7 +24,7 @@ class LocalePluralFormatTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale');
+  public static $modules = ['locale'];
 
   /**
    * {@inheritdoc}
@@ -32,7 +32,7 @@ class LocalePluralFormatTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer languages', 'translate interface', 'access administration pages'));
+    $this->adminUser = $this->drupalCreateUser(['administer languages', 'translate interface', 'access administration pages']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -43,23 +43,23 @@ protected function setUp() {
   public function testGetPluralFormat() {
     // Import some .po files with formulas to set up the environment.
     // These will also add the languages to the system.
-    $this->importPoFile($this->getPoFileWithSimplePlural(), array(
+    $this->importPoFile($this->getPoFileWithSimplePlural(), [
       'langcode' => 'fr',
-    ));
-    $this->importPoFile($this->getPoFileWithComplexPlural(), array(
+    ]);
+    $this->importPoFile($this->getPoFileWithComplexPlural(), [
       'langcode' => 'hr',
-    ));
+    ]);
 
     // Attempt to import some broken .po files as well to prove that these
     // will not overwrite the proper plural formula imported above.
-    $this->importPoFile($this->getPoFileWithMissingPlural(), array(
+    $this->importPoFile($this->getPoFileWithMissingPlural(), [
       'langcode' => 'fr',
       'overwrite_options[not_customized]' => TRUE,
-    ));
-    $this->importPoFile($this->getPoFileWithBrokenPlural(), array(
+    ]);
+    $this->importPoFile($this->getPoFileWithBrokenPlural(), [
       'langcode' => 'hr',
       'overwrite_options[not_customized]' => TRUE,
-    ));
+    ]);
 
     // Reset static caches from locale_get_plural() to ensure we get fresh data.
     drupal_static_reset('locale_get_plural');
@@ -67,49 +67,49 @@ public function testGetPluralFormat() {
     drupal_static_reset('locale');
 
     // Expected plural translation strings for each plural index.
-    $plural_strings = array(
+    $plural_strings = [
       // English is not imported in this case, so we assume built-in text
       // and formulas.
-      'en' => array(
+      'en' => [
         0 => '1 hour',
         1 => '@count hours',
-      ),
-      'fr' => array(
+      ],
+      'fr' => [
         0 => '@count heure',
         1 => '@count heures',
-      ),
-      'hr' => array(
+      ],
+      'hr' => [
         0 => '@count sat',
         1 => '@count sata',
         2 => '@count sati',
-      ),
+      ],
       // Hungarian is not imported, so it should assume the same text as
       // English, but it will always pick the plural form as per the built-in
       // logic, so only index -1 is relevant with the plural value.
-      'hu' => array(
+      'hu' => [
         0 => '1 hour',
         -1 => '@count hours',
-      ),
-    );
+      ],
+    ];
 
     // Expected plural indexes precomputed base on the plural formulas with
     // given $count value.
-    $plural_tests = array(
-      'en' => array(
+    $plural_tests = [
+      'en' => [
         1 => 0,
         0 => 1,
         5 => 1,
         123 => 1,
         235 => 1,
-      ),
-      'fr' => array(
+      ],
+      'fr' => [
         1 => 0,
         0 => 0,
         5 => 1,
         123 => 1,
         235 => 1,
-      ),
-      'hr' => array(
+      ],
+      'hr' => [
         1 => 0,
         21 => 0,
         0 => 2,
@@ -117,13 +117,13 @@ public function testGetPluralFormat() {
         8 => 2,
         123 => 1,
         235 => 2,
-      ),
-      'hu' => array(
+      ],
+      'hu' => [
         1 => -1,
         21 => -1,
         0 => -1,
-      ),
-    );
+      ],
+    ];
 
     foreach ($plural_tests as $langcode => $tests) {
       foreach ($tests as $count => $expected_plural_index) {
@@ -133,14 +133,14 @@ public function testGetPluralFormat() {
         // expected index as per the logic for translation lookups.
         $expected_plural_index = ($count == 1) ? 0 : $expected_plural_index;
         $expected_plural_string = str_replace('@count', $count, $plural_strings[$langcode][$expected_plural_index]);
-        $this->assertIdentical(\Drupal::translation()->formatPlural($count, '1 hour', '@count hours', array(), array('langcode' => $langcode))->render(), $expected_plural_string, 'Plural translation of 1 hours / @count hours for count ' . $count . ' in ' . $langcode . ' is ' . $expected_plural_string);
+        $this->assertIdentical(\Drupal::translation()->formatPlural($count, '1 hour', '@count hours', [], ['langcode' => $langcode])->render(), $expected_plural_string, 'Plural translation of 1 hours / @count hours for count ' . $count . ' in ' . $langcode . ' is ' . $expected_plural_string);
         // DO NOT use translation to pass translated strings into
         // PluralTranslatableMarkup::createFromTranslatedString() this way. It
         // is designed to be used with *already* translated text like settings
         // from configuration. We use PHP translation here just because we have
         // the expected result data in that format.
-        $translated_string = \Drupal::translation()->translate('1 hour' . PluralTranslatableMarkup::DELIMITER . '@count hours', array(), array('langcode' => $langcode));
-        $plural = PluralTranslatableMarkup::createFromTranslatedString($count, $translated_string, array(), array('langcode' => $langcode));
+        $translated_string = \Drupal::translation()->translate('1 hour' . PluralTranslatableMarkup::DELIMITER . '@count hours', [], ['langcode' => $langcode]);
+        $plural = PluralTranslatableMarkup::createFromTranslatedString($count, $translated_string, [], ['langcode' => $langcode]);
         $this->assertIdentical($plural->render(), $expected_plural_string);
       }
     }
@@ -153,9 +153,9 @@ public function testPluralEditDateFormatter() {
 
     // Import some .po files with formulas to set up the environment.
     // These will also add the languages to the system.
-    $this->importPoFile($this->getPoFileWithSimplePlural(), array(
+    $this->importPoFile($this->getPoFileWithSimplePlural(), [
       'langcode' => 'fr',
-    ));
+    ]);
 
     // Set French as the site default language.
     $this->config('system.site')->set('default_langcode', 'fr')->save();
@@ -170,12 +170,12 @@ public function testPluralEditDateFormatter() {
     $this->assertText("seconde", "'Member for' text is translated.");
 
     $path = 'admin/config/regional/translate/';
-    $search = array(
+    $search = [
       'langcode' => 'fr',
       // Limit to only translated strings to ensure that database ordering does
       // not break the test.
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm($path, $search, t('Filter'));
     // Plural values for the langcode fr.
     $this->assertText('@count seconde');
@@ -185,20 +185,20 @@ public function testPluralEditDateFormatter() {
     // langcode here because the language will be English by default and will
     // not save our source string for performance optimization if we do not ask
     // specifically for a language.
-    \Drupal::translation()->formatPlural(1, '1 second', '@count seconds', array(), array('langcode' => 'fr'))->render();
-    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", array(':source' => "1 second" . LOCALE_PLURAL_DELIMITER . "@count seconds"))->fetchField();
+    \Drupal::translation()->formatPlural(1, '1 second', '@count seconds', [], ['langcode' => 'fr'])->render();
+    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 second" . LOCALE_PLURAL_DELIMITER . "@count seconds"])->fetchField();
     // Look up editing page for this plural string and check fields.
-    $search = array(
+    $search = [
       'string' => '1 second',
       'langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
 
     // Save complete translations for the string in langcode fr.
-    $edit = array(
+    $edit = [
       "strings[$lid][translations][0]" => '1 seconde updated',
       "strings[$lid][translations][1]" => '@count secondes updated',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save translations'));
 
     // User interface input for translating seconds should not be duplicated
@@ -218,17 +218,17 @@ public function testPluralEditDateFormatter() {
   public function testPluralEditExport() {
     // Import some .po files with formulas to set up the environment.
     // These will also add the languages to the system.
-    $this->importPoFile($this->getPoFileWithSimplePlural(), array(
+    $this->importPoFile($this->getPoFileWithSimplePlural(), [
       'langcode' => 'fr',
-    ));
-    $this->importPoFile($this->getPoFileWithComplexPlural(), array(
+    ]);
+    $this->importPoFile($this->getPoFileWithComplexPlural(), [
       'langcode' => 'hr',
-    ));
+    ]);
 
     // Get the French translations.
-    $this->drupalPostForm('admin/config/regional/translate/export', array(
+    $this->drupalPostForm('admin/config/regional/translate/export', [
       'langcode' => 'fr',
-    ), t('Export'));
+    ], t('Export'));
     // Ensure we have a translation file.
     $this->assertRaw('# French translation of Drupal', 'Exported French translation file.');
     // Ensure our imported translations exist in the file.
@@ -237,9 +237,9 @@ public function testPluralEditExport() {
     $this->assertRaw("msgid \"1 hour\"\nmsgid_plural \"@count hours\"\nmsgstr[0] \"@count heure\"\nmsgstr[1] \"@count heures\"", 'Plural translations exported properly.');
 
     // Get the Croatian translations.
-    $this->drupalPostForm('admin/config/regional/translate/export', array(
+    $this->drupalPostForm('admin/config/regional/translate/export', [
       'langcode' => 'hr',
-    ), t('Export'));
+    ], t('Export'));
     // Ensure we have a translation file.
     $this->assertRaw('# Croatian translation of Drupal', 'Exported Croatian translation file.');
     // Ensure our imported translations exist in the file.
@@ -254,9 +254,9 @@ public function testPluralEditExport() {
 
     // Look up editing page for this plural string and check fields.
     $path = 'admin/config/regional/translate/';
-    $search = array(
+    $search = [
       'langcode' => 'hr',
-    );
+    ];
     $this->drupalPostForm($path, $search, t('Filter'));
     // Labels for plural editing elements.
     $this->assertText('Singular form');
@@ -270,15 +270,15 @@ public function testPluralEditExport() {
     $this->assertText('@count sati');
 
     // Edit langcode hr translations and see if that took effect.
-    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", array(':source' => "1 hour" . LOCALE_PLURAL_DELIMITER . "@count hours"))->fetchField();
-    $edit = array(
+    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 hour" . LOCALE_PLURAL_DELIMITER . "@count hours"])->fetchField();
+    $edit = [
       "strings[$lid][translations][1]" => '@count sata edited',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save translations'));
 
-    $search = array(
+    $search = [
       'langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     // Plural values for the langcode fr.
     $this->assertText('@count heure');
@@ -286,57 +286,57 @@ public function testPluralEditExport() {
     $this->assertNoText('2. plural form');
 
     // Edit langcode fr translations and see if that took effect.
-    $edit = array(
+    $edit = [
       "strings[$lid][translations][0]" => '@count heure edited',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save translations'));
 
     // Inject a plural source string to the database. We need to use a specific
     // langcode here because the language will be English by default and will
     // not save our source string for performance optimization if we do not ask
     // specifically for a language.
-    \Drupal::translation()->formatPlural(1, '1 day', '@count days', array(), array('langcode' => 'fr'))->render();
-    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", array(':source' => "1 day" . LOCALE_PLURAL_DELIMITER . "@count days"))->fetchField();
+    \Drupal::translation()->formatPlural(1, '1 day', '@count days', [], ['langcode' => 'fr'])->render();
+    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 day" . LOCALE_PLURAL_DELIMITER . "@count days"])->fetchField();
     // Look up editing page for this plural string and check fields.
-    $search = array(
+    $search = [
       'string' => '1 day',
       'langcode' => 'fr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
 
     // Save complete translations for the string in langcode fr.
-    $edit = array(
+    $edit = [
       "strings[$lid][translations][0]" => '1 jour',
       "strings[$lid][translations][1]" => '@count jours',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save translations'));
 
     // Save complete translations for the string in langcode hr.
-    $search = array(
+    $search = [
       'string' => '1 day',
       'langcode' => 'hr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
 
-    $edit = array(
+    $edit = [
       "strings[$lid][translations][0]" => '@count dan',
       "strings[$lid][translations][1]" => '@count dana',
       "strings[$lid][translations][2]" => '@count dana',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save translations'));
 
     // Get the French translations.
-    $this->drupalPostForm('admin/config/regional/translate/export', array(
+    $this->drupalPostForm('admin/config/regional/translate/export', [
       'langcode' => 'fr',
-    ), t('Export'));
+    ], t('Export'));
     // Check for plural export specifically.
     $this->assertRaw("msgid \"1 hour\"\nmsgid_plural \"@count hours\"\nmsgstr[0] \"@count heure edited\"\nmsgstr[1] \"@count heures\"", 'Edited French plural translations for hours exported properly.');
     $this->assertRaw("msgid \"1 day\"\nmsgid_plural \"@count days\"\nmsgstr[0] \"1 jour\"\nmsgstr[1] \"@count jours\"", 'Added French plural translations for days exported properly.');
 
     // Get the Croatian translations.
-    $this->drupalPostForm('admin/config/regional/translate/export', array(
+    $this->drupalPostForm('admin/config/regional/translate/export', [
       'langcode' => 'hr',
-    ), t('Export'));
+    ], t('Export'));
     // Check for plural export specifically.
     $this->assertRaw("msgid \"1 hour\"\nmsgid_plural \"@count hours\"\nmsgstr[0] \"@count sat\"\nmsgstr[1] \"@count sata edited\"\nmsgstr[2] \"@count sati\"", 'Edited Croatian plural translations exported properly.');
     $this->assertRaw("msgid \"1 day\"\nmsgid_plural \"@count days\"\nmsgstr[0] \"@count dan\"\nmsgstr[1] \"@count dana\"\nmsgstr[2] \"@count dana\"", 'Added Croatian plural translations exported properly.');
@@ -350,7 +350,7 @@ public function testPluralEditExport() {
    * @param array $options
    *   Additional options to pass to the translation import form.
    */
-  public function importPoFile($contents, array $options = array()) {
+  public function importPoFile($contents, array $options = []) {
     $name = \Drupal::service('file_system')->tempnam('temporary://', "po_") . '.po';
     file_put_contents($name, $contents);
     $options['files[file]'] = $name;
diff --git a/core/modules/locale/src/Tests/LocaleTranslateStringTourTest.php b/core/modules/locale/src/Tests/LocaleTranslateStringTourTest.php
index 5c642f2c2ccc72e7affa11898197c266bfe87957..a4b1656655b92a9723f69734450ac6435aa9bdfe 100644
--- a/core/modules/locale/src/Tests/LocaleTranslateStringTourTest.php
+++ b/core/modules/locale/src/Tests/LocaleTranslateStringTourTest.php
@@ -23,14 +23,14 @@ class LocaleTranslateStringTourTest extends TourTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale', 'tour');
+  public static $modules = ['locale', 'tour'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array('translate interface', 'access tour', 'administer languages'));
+    $this->adminUser = $this->drupalCreateUser(['translate interface', 'access tour', 'administer languages']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -39,7 +39,7 @@ protected function setUp() {
    */
   public function testTranslateStringTourTips() {
     // Add another language so there are no missing form items.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'es';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
diff --git a/core/modules/locale/src/Tests/LocaleTranslationUiTest.php b/core/modules/locale/src/Tests/LocaleTranslationUiTest.php
index aad0119fa2387d5cbd40ae7ae28d2ce2b67af000..53f77c19fd2c005fd2cf1fa7146e6b2b51d64141 100644
--- a/core/modules/locale/src/Tests/LocaleTranslationUiTest.php
+++ b/core/modules/locale/src/Tests/LocaleTranslationUiTest.php
@@ -20,16 +20,16 @@ class LocaleTranslationUiTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale');
+  public static $modules = ['locale'];
 
   /**
    * Enable interface translation to English.
    */
   public function testEnglishTranslation() {
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     $this->drupalLogin($admin_user);
 
-    $this->drupalPostForm('admin/config/regional/language/edit/en', array('locale_translate_english' => TRUE), t('Save language'));
+    $this->drupalPostForm('admin/config/regional/language/edit/en', ['locale_translate_english' => TRUE], t('Save language'));
     $this->assertLinkByHref('/admin/config/regional/translate?langcode=en', 0, 'Enabled interface translation to English.');
   }
 
@@ -38,9 +38,9 @@ public function testEnglishTranslation() {
    */
   public function testStringTranslation() {
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     // User to translate and delete string.
-    $translate_user = $this->drupalCreateUser(array('translate interface', 'access administration pages'));
+    $translate_user = $this->drupalCreateUser(['translate interface', 'access administration pages']);
     // Code for the language.
     $langcode = 'xx';
     // The English name for the language. This will be translated.
@@ -51,15 +51,15 @@ public function testStringTranslation() {
 
     // Add custom language.
     $this->drupalLogin($admin_user);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     // Add string.
-    t($name, array(), array('langcode' => $langcode))->render();
+    t($name, [], ['langcode' => $langcode])->render();
     // Reset locale cache.
     $this->container->get('string_translation')->reset();
     $this->assertRaw('"edit-languages-' . $langcode . '-weight"', 'Language code found.');
@@ -68,11 +68,11 @@ public function testStringTranslation() {
 
     // Search for the name and translate it.
     $this->drupalLogin($translate_user);
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => $langcode,
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText($name, 'Search found the string as untranslated.');
 
@@ -81,7 +81,7 @@ public function testStringTranslation() {
     $this->assertNoOption('edit-langcode', 'en', 'No way to translate the string to English.');
     $this->drupalLogout();
     $this->drupalLogin($admin_user);
-    $this->drupalPostForm('admin/config/regional/language/edit/en', array('locale_translate_english' => TRUE), t('Save language'));
+    $this->drupalPostForm('admin/config/regional/language/edit/en', ['locale_translate_english' => TRUE], t('Save language'));
     $this->drupalLogout();
     $this->drupalLogin($translate_user);
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
@@ -90,55 +90,55 @@ public function testStringTranslation() {
     // Assume this is the only result, given the random name.
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $translation,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
     $this->assertText(t('The strings have been saved.'), 'The strings have been saved.');
     $url_bits = explode('?', $this->getUrl());
-    $this->assertEqual($url_bits[0], \Drupal::url('locale.translate_page', array(), array('absolute' => TRUE)), 'Correct page redirection.');
-    $search = array(
+    $this->assertEqual($url_bits[0], \Drupal::url('locale.translate_page', [], ['absolute' => TRUE]), 'Correct page redirection.');
+    $search = [
       'string' => $name,
       'langcode' => $langcode,
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertRaw($translation, 'Non-English translation properly saved.');
 
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => 'en',
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $translation_to_en,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => 'en',
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertRaw($translation_to_en, 'English translation properly saved.');
 
-    $this->assertTrue($name != $translation && t($name, array(), array('langcode' => $langcode)) == $translation, 't() works for non-English.');
+    $this->assertTrue($name != $translation && t($name, [], ['langcode' => $langcode]) == $translation, 't() works for non-English.');
     // Refresh the locale() cache to get fresh data from t() below. We are in
     // the same HTTP request and therefore t() is not refreshed by saving the
     // translation above.
     $this->container->get('string_translation')->reset();
     // Now we should get the proper fresh translation from t().
-    $this->assertTrue($name != $translation_to_en && t($name, array(), array('langcode' => 'en')) == $translation_to_en, 't() works for English.');
-    $this->assertTrue(t($name, array(), array('langcode' => LanguageInterface::LANGCODE_SYSTEM)) == $name, 't() works for LanguageInterface::LANGCODE_SYSTEM.');
+    $this->assertTrue($name != $translation_to_en && t($name, [], ['langcode' => 'en']) == $translation_to_en, 't() works for English.');
+    $this->assertTrue(t($name, [], ['langcode' => LanguageInterface::LANGCODE_SYSTEM]) == $name, 't() works for LanguageInterface::LANGCODE_SYSTEM.');
 
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => 'en',
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText(t('No strings available.'), 'String is translated.');
 
@@ -148,17 +148,17 @@ public function testStringTranslation() {
     $this->assertText('Enter the password that accompanies your username.');
 
     $this->drupalLogin($translate_user);
-    $search = array(
+    $search = [
       'string' => 'accompanies your username',
       'langcode' => $langcode,
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => 'Please enter your Llama username.',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     $this->drupalLogout();
@@ -169,9 +169,9 @@ public function testStringTranslation() {
     $this->drupalLogin($admin_user);
     $path = 'admin/config/regional/language/delete/' . $langcode;
     // This a confirm form, we do not need any fields changed.
-    $this->drupalPostForm($path, array(), t('Delete'));
+    $this->drupalPostForm($path, [], t('Delete'));
     // We need raw here because %language and %langcode will add HTML.
-    $t_args = array('%language' => $name, '%langcode' => $langcode);
+    $t_args = ['%language' => $name, '%langcode' => $langcode];
     $this->assertRaw(t('The %language (%langcode) language has been removed.', $t_args), 'The test language has been removed.');
     // Reload to remove $name.
     $this->drupalGet($path);
@@ -181,26 +181,26 @@ public function testStringTranslation() {
 
     // Delete the string.
     $this->drupalLogin($translate_user);
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => 'en',
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     // Assume this is the only result, given the random name.
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => '',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
     $this->assertRaw($name, 'The strings have been saved.');
     $this->drupalLogin($translate_user);
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => 'en',
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertNoText(t('No strings available.'), 'The translation has been removed');
   }
@@ -210,7 +210,7 @@ public function testStringTranslation() {
    * properly created and rebuilt on deletion.
    */
   public function testJavaScriptTranslation() {
-    $user = $this->drupalCreateUser(array('translate interface', 'administer languages', 'access administration pages'));
+    $user = $this->drupalCreateUser(['translate interface', 'administer languages', 'access administration pages']);
     $this->drupalLogin($user);
     $config = $this->config('locale.settings');
 
@@ -219,12 +219,12 @@ public function testJavaScriptTranslation() {
     $name = $this->randomMachineName(16);
 
     // Add custom language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     $this->container->get('language_manager')->reset();
 
@@ -234,38 +234,38 @@ public function testJavaScriptTranslation() {
     // {locales_source} table and translate it.
     $query = db_select('locales_source', 's');
     $query->addJoin('INNER', 'locales_location', 'l', 's.lid = l.lid');
-    $source = $query->fields('s', array('source'))
+    $source = $query->fields('s', ['source'])
       ->condition('l.type', 'javascript')
       ->range(0, 1)
       ->execute()
       ->fetchField();
 
-    $search = array(
+    $search = [
       'string' => $source,
       'langcode' => $langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
 
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Trigger JavaScript translation parsing and building.
     _locale_rebuild_js($langcode);
 
-    $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: array();
+    $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: [];
     $js_file = 'public://' . $config->get('javascript.directory') . '/' . $langcode . '_' . $locale_javascripts[$langcode] . '.js';
-    $this->assertTrue($result = file_exists($js_file), SafeMarkup::format('JavaScript file created: %file', array('%file' => $result ? $js_file : 'not found')));
+    $this->assertTrue($result = file_exists($js_file), SafeMarkup::format('JavaScript file created: %file', ['%file' => $result ? $js_file : 'not found']));
 
     // Test JavaScript translation rebuilding.
     file_unmanaged_delete($js_file);
-    $this->assertTrue($result = !file_exists($js_file), SafeMarkup::format('JavaScript file deleted: %file', array('%file' => $result ? $js_file : 'found')));
+    $this->assertTrue($result = !file_exists($js_file), SafeMarkup::format('JavaScript file deleted: %file', ['%file' => $result ? $js_file : 'found']));
     _locale_rebuild_js($langcode);
-    $this->assertTrue($result = file_exists($js_file), SafeMarkup::format('JavaScript file rebuilt: %file', array('%file' => $result ? $js_file : 'not found')));
+    $this->assertTrue($result = file_exists($js_file), SafeMarkup::format('JavaScript file rebuilt: %file', ['%file' => $result ? $js_file : 'not found']));
   }
 
   /**
@@ -273,7 +273,7 @@ public function testJavaScriptTranslation() {
    */
   public function testStringValidation() {
     // User to add language and strings.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages', 'translate interface'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages', 'translate interface']);
     $this->drupalLogin($admin_user);
     $langcode = 'xx';
     // The English name for the language. This will be translated.
@@ -290,30 +290,30 @@ public function testStringValidation() {
     $bad_translations[$key] = "<BODY ONLOAD=alert('xss')>" . $key;
 
     // Add custom language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     // Add string.
-    t($name, array(), array('langcode' => $langcode))->render();
+    t($name, [], ['langcode' => $langcode])->render();
     // Reset locale cache.
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => $langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     // Find the edit path.
 
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
     foreach ($bad_translations as $translation) {
-      $edit = array(
+      $edit = [
         $lid => $translation,
-      );
+      ];
       $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
       // Check for a form error on the textarea.
       $form_class = $this->xpath('//form[@id="locale-translate-edit-form"]//textarea/@class');
@@ -327,9 +327,9 @@ public function testStringValidation() {
    */
   public function testStringSearch() {
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     // User to translate and delete string.
-    $translate_user = $this->drupalCreateUser(array('translate interface', 'access administration pages'));
+    $translate_user = $this->drupalCreateUser(['translate interface', 'access administration pages']);
 
     // Code for the language.
     $langcode = 'xx';
@@ -340,35 +340,35 @@ public function testStringSearch() {
 
     // Add custom language.
     $this->drupalLogin($admin_user);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => 'yy',
       'label' => $this->randomMachineName(16),
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
     // Add string.
-    t($name, array(), array('langcode' => $langcode))->render();
+    t($name, [], ['langcode' => $langcode])->render();
     // Reset locale cache.
     $this->container->get('string_translation')->reset();
     $this->drupalLogout();
 
     // Search for the name.
     $this->drupalLogin($translate_user);
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => $langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     // assertText() seems to remove the input field where $name always could be
     // found, so this is not a false assert. See how assertNoText succeeds
@@ -377,21 +377,21 @@ public function testStringSearch() {
 
     // Ensure untranslated string doesn't appear if searching on 'only
     // translated strings'.
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => $langcode,
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText(t('No strings available.'), "Search didn't find the string.");
 
     // Ensure untranslated string appears if searching on 'only untranslated
     // strings'.
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => $langcode,
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertNoText(t('No strings available.'), 'Search found the string.');
 
@@ -400,66 +400,66 @@ public function testStringSearch() {
     // We save the lid from the path.
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $translation,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Ensure translated string does appear if searching on 'only
     // translated strings'.
-    $search = array(
+    $search = [
       'string' => $translation,
       'langcode' => $langcode,
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertNoText(t('No strings available.'), 'Search found the translation.');
 
     // Ensure translated source string doesn't appear if searching on 'only
     // untranslated strings'.
-    $search = array(
+    $search = [
       'string' => $name,
       'langcode' => $langcode,
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText(t('No strings available.'), "Search didn't find the source string.");
 
     // Ensure translated string doesn't appear if searching on 'only
     // untranslated strings'.
-    $search = array(
+    $search = [
       'string' => $translation,
       'langcode' => $langcode,
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText(t('No strings available.'), "Search didn't find the translation.");
 
     // Ensure translated string does appear if searching on the custom language.
-    $search = array(
+    $search = [
       'string' => $translation,
       'langcode' => $langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertNoText(t('No strings available.'), 'Search found the translation.');
 
     // Ensure translated string doesn't appear if searching in System (English).
-    $search = array(
+    $search = [
       'string' => $translation,
       'langcode' => 'yy',
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText(t('No strings available.'), "Search didn't find the translation.");
 
     // Search for a string that isn't in the system.
     $unavailable_string = $this->randomMachineName(16);
-    $search = array(
+    $search = [
       'string' => $unavailable_string,
       'langcode' => $langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText(t('No strings available.'), "Search didn't find the invalid string.");
   }
@@ -468,35 +468,35 @@ public function testStringSearch() {
    * Tests that only changed strings are saved customized when edited.
    */
   public function testUICustomizedStrings() {
-    $user = $this->drupalCreateUser(array('translate interface', 'administer languages', 'access administration pages'));
+    $user = $this->drupalCreateUser(['translate interface', 'administer languages', 'access administration pages']);
     $this->drupalLogin($user);
     ConfigurableLanguage::createFromLangcode('de')->save();
 
     // Create test source string.
-    $string = $this->container->get('locale.storage')->createString(array(
+    $string = $this->container->get('locale.storage')->createString([
       'source' => $this->randomMachineName(100),
       'context' => $this->randomMachineName(20),
-    ))->save();
+    ])->save();
 
     // Create translation for new string and save it as non-customized.
-    $translation = $this->container->get('locale.storage')->createTranslation(array(
+    $translation = $this->container->get('locale.storage')->createTranslation([
       'lid' => $string->lid,
       'language' => 'de',
       'translation' => $this->randomMachineName(100),
       'customized' => 0,
-    ))->save();
+    ])->save();
 
     // Reset locale cache.
     $this->container->get('string_translation')->reset();
 
     // Ensure non-customized translation string does appear if searching
     // non-customized translation.
-    $search = array(
+    $search = [
       'string' => $string->getString(),
       'langcode' => 'de',
       'translation' => 'translated',
       'customized' => '0',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
 
     $this->assertText($translation->getString(), 'Translation is found in search result.');
@@ -504,38 +504,38 @@ public function testUICustomizedStrings() {
     // Submit the translations without changing the translation.
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $translation->getString(),
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Ensure unchanged translation string does appear if searching
     // non-customized translation.
-    $search = array(
+    $search = [
       'string' => $string->getString(),
       'langcode' => 'de',
       'translation' => 'translated',
       'customized' => '0',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText($string->getString(), 'Translation is not marked as customized.');
 
     // Submit the translations with a new translation.
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $this->randomMachineName(100),
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Ensure changed translation string does appear if searching customized
     // translation.
-    $search = array(
+    $search = [
       'string' => $string->getString(),
       'langcode' => 'de',
       'translation' => 'translated',
       'customized' => '1',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText($string->getString(), "Translation is marked as customized.");
   }
diff --git a/core/modules/locale/src/Tests/LocaleUpdateBase.php b/core/modules/locale/src/Tests/LocaleUpdateBase.php
index 85196ad7cca7837f362f9b2d60daaf6e7dd1a632..b228a962de5f7dab19d7899d785fb7a3dbb02834 100644
--- a/core/modules/locale/src/Tests/LocaleUpdateBase.php
+++ b/core/modules/locale/src/Tests/LocaleUpdateBase.php
@@ -45,7 +45,7 @@ abstract class LocaleUpdateBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale', 'locale_test');
+  public static $modules = ['locale', 'locale_test'];
 
   /**
    * {@inheritdoc}
@@ -85,10 +85,10 @@ protected function setTranslationsDirectory($path) {
    *   The language code of the language to add.
    */
   protected function addLanguage($langcode) {
-    $edit = array('predefined_langcode' => $langcode);
+    $edit = ['predefined_langcode' => $langcode];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
     $this->container->get('language_manager')->reset();
-    $this->assertTrue(\Drupal::languageManager()->getLanguage($langcode), SafeMarkup::format('Language %langcode added.', array('%langcode' => $langcode)));
+    $this->assertTrue(\Drupal::languageManager()->getLanguage($langcode), SafeMarkup::format('Language %langcode added.', ['%langcode' => $langcode]));
   }
 
   /**
@@ -105,7 +105,7 @@ protected function addLanguage($langcode) {
    *   singular strings are supported, no plurals. No double quotes are allowed
    *   in source and translations strings.
    */
-  protected function makePoFile($path, $filename, $timestamp = NULL, array $translations = array()) {
+  protected function makePoFile($path, $filename, $timestamp = NULL, array $translations = []) {
     $timestamp = $timestamp ? $timestamp : REQUEST_TIME;
     $path = 'public://' . $path;
     $text = '';
@@ -184,9 +184,9 @@ protected function setTranslationFiles() {
     $config->set('translation.default_filename', '%project-%version.%language._po')->save();
 
     // Setting up sets of translations for the translation files.
-    $translations_one = array('January' => 'Januar_1', 'February' => 'Februar_1', 'March' => 'Marz_1');
-    $translations_two = array('February' => 'Februar_2', 'March' => 'Marz_2', 'April' => 'April_2');
-    $translations_three = array('April' => 'April_3', 'May' => 'Mai_3', 'June' => 'Juni_3');
+    $translations_one = ['January' => 'Januar_1', 'February' => 'Februar_1', 'March' => 'Marz_1'];
+    $translations_two = ['February' => 'Februar_2', 'March' => 'Marz_2', 'April' => 'April_2'];
+    $translations_three = ['April' => 'April_3', 'May' => 'Mai_3', 'June' => 'Juni_3'];
 
     // Add a number of files to the local file system to serve as remote
     // translation server and match the project definitions set in
@@ -212,71 +212,71 @@ protected function setCurrentTranslations() {
     // Add non customized translations to the database.
     $langcode = 'de';
     $context = '';
-    $non_customized_translations = array(
+    $non_customized_translations = [
       'March' => 'Marz',
       'June' => 'Juni',
-    );
+    ];
     foreach ($non_customized_translations as $source => $translation) {
-      $string = $this->container->get('locale.storage')->createString(array(
+      $string = $this->container->get('locale.storage')->createString([
         'source' => $source,
         'context' => $context,
-      ))
+      ])
         ->save();
-      $this->container->get('locale.storage')->createTranslation(array(
+      $this->container->get('locale.storage')->createTranslation([
         'lid' => $string->getId(),
         'language' => $langcode,
         'translation' => $translation,
         'customized' => LOCALE_NOT_CUSTOMIZED,
-      ))->save();
+      ])->save();
     }
 
     // Add customized translations to the database.
-    $customized_translations = array(
+    $customized_translations = [
       'January' => 'Januar_customized',
       'February' => 'Februar_customized',
       'May' => 'Mai_customized',
-    );
+    ];
     foreach ($customized_translations as $source => $translation) {
-      $string = $this->container->get('locale.storage')->createString(array(
+      $string = $this->container->get('locale.storage')->createString([
         'source' => $source,
         'context' => $context,
-      ))
+      ])
         ->save();
-      $this->container->get('locale.storage')->createTranslation(array(
+      $this->container->get('locale.storage')->createTranslation([
         'lid' => $string->getId(),
         'language' => $langcode,
         'translation' => $translation,
         'customized' => LOCALE_CUSTOMIZED,
-      ))->save();
+      ])->save();
     }
 
     // Add a state of current translations in locale_files.
-    $default = array(
+    $default = [
       'langcode' => $langcode,
       'uri' => '',
       'timestamp' => $this->timestampMedium,
       'last_checked' => $this->timestampMedium,
-    );
-    $data[] = array(
+    ];
+    $data[] = [
       'project' => 'contrib_module_one',
       'filename' => 'contrib_module_one-8.x-1.1.de._po',
       'version' => '8.x-1.1',
-    );
-    $data[] = array(
+    ];
+    $data[] = [
       'project' => 'contrib_module_two',
       'filename' => 'contrib_module_two-8.x-2.0-beta4.de._po',
       'version' => '8.x-2.0-beta4',
-    );
-    $data[] = array(
+    ];
+    $data[] = [
       'project' => 'contrib_module_three',
       'filename' => 'contrib_module_three-8.x-1.0.de._po',
       'version' => '8.x-1.0',
-    );
-    $data[] = array(
+    ];
+    $data[] = [
       'project' => 'custom_module_one',
       'filename' => 'custom_module_one.de.po',
       'version' => '',
-    );
+    ];
     foreach ($data as $file) {
       $file = array_merge($default, $file);
       db_insert('locale_file')->fields($file)->execute();
@@ -297,9 +297,9 @@ protected function setCurrentTranslations() {
    *   (optional) A message to display with the assertion.
    */
   protected function assertTranslation($source, $translation, $langcode, $message = '') {
-    $db_translation = db_query('SELECT translation FROM {locales_target} lt INNER JOIN {locales_source} ls ON ls.lid = lt.lid WHERE ls.source = :source AND lt.language = :langcode', array(':source' => $source, ':langcode' => $langcode))->fetchField();
+    $db_translation = db_query('SELECT translation FROM {locales_target} lt INNER JOIN {locales_source} ls ON ls.lid = lt.lid WHERE ls.source = :source AND lt.language = :langcode', [':source' => $source, ':langcode' => $langcode])->fetchField();
     $db_translation = $db_translation == FALSE ? '' : $db_translation;
-    $this->assertEqual($translation, $db_translation, $message ? $message : format_string('Correct translation of %source (%language)', array('%source' => $source, '%language' => $langcode)));
+    $this->assertEqual($translation, $db_translation, $message ? $message : format_string('Correct translation of %source (%language)', ['%source' => $source, '%language' => $langcode]));
   }
 
 }
diff --git a/core/modules/locale/src/Tests/LocaleUpdateCronTest.php b/core/modules/locale/src/Tests/LocaleUpdateCronTest.php
index 569b818bd2a36683330e5b03d569448d6d71135d..78a14ecac858c86131628abe3e0ce3dcb64d5f90 100644
--- a/core/modules/locale/src/Tests/LocaleUpdateCronTest.php
+++ b/core/modules/locale/src/Tests/LocaleUpdateCronTest.php
@@ -9,14 +9,14 @@
  */
 class LocaleUpdateCronTest extends LocaleUpdateBase {
 
-  protected $batchOutput = array();
+  protected $batchOutput = [];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'translate interface'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'translate interface']);
     $this->drupalLogin($admin_user);
     $this->addLanguage('de');
   }
@@ -35,7 +35,7 @@ public function testUpdateCron() {
 
     // Update translations using batch to ensure a clean test starting point.
     $this->drupalGet('admin/reports/translations/check');
-    $this->drupalPostForm('admin/reports/translations', array(), t('Update translations'));
+    $this->drupalPostForm('admin/reports/translations', [], t('Update translations'));
 
     // Store translation status for comparison.
     $initial_history = locale_translation_get_file_history();
@@ -48,16 +48,16 @@ public function testUpdateCron() {
     // Prepare for test: Simulate that the file has not been checked for a long
     // time. Set the last_check timestamp to zero.
     $query = db_update('locale_file');
-    $query->fields(array('last_checked' => 0));
+    $query->fields(['last_checked' => 0]);
     $query->condition('project', 'contrib_module_two');
     $query->condition('langcode', 'de');
     $query->execute();
 
     // Test: Disable cron update and verify that no tasks are added to the
     // queue.
-    $edit = array(
+    $edit = [
       'update_interval_days' => 0,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate/settings', $edit, t('Save configuration'));
 
     // Execute locale cron tasks to add tasks to the queue.
@@ -70,9 +70,9 @@ public function testUpdateCron() {
     // Test: Enable cron update and check if update tasks are added to the
     // queue.
     // Set cron update to Weekly.
-    $edit = array(
+    $edit = [
       'update_interval_days' => 7,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate/settings', $edit, t('Save configuration'));
 
     // Execute locale cron tasks to add tasks to the queue.
diff --git a/core/modules/locale/src/Tests/LocaleUpdateDevelopmentReleaseTest.php b/core/modules/locale/src/Tests/LocaleUpdateDevelopmentReleaseTest.php
index cfd2446fc7ffea18e1b53c505692b0e9647f670f..3d7970bb984f3e7576947b47cba3403060c5d293 100644
--- a/core/modules/locale/src/Tests/LocaleUpdateDevelopmentReleaseTest.php
+++ b/core/modules/locale/src/Tests/LocaleUpdateDevelopmentReleaseTest.php
@@ -11,14 +11,14 @@
  */
 class LocaleUpdateDevelopmentReleaseTest extends WebTestBase {
 
-  public static $modules = array('locale', 'locale_test_development_release');
+  public static $modules = ['locale', 'locale_test_development_release'];
 
   protected function setUp() {
     parent::setUp();
     module_load_include('compare.inc', 'locale');
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer languages', 'access administration pages', 'translate interface'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer languages', 'access administration pages', 'translate interface']);
     $this->drupalLogin($admin_user);
-    $this->drupalPostForm('admin/config/regional/language/add', array('predefined_langcode' => 'hu'), t('Add language'));
+    $this->drupalPostForm('admin/config/regional/language/add', ['predefined_langcode' => 'hu'], t('Add language'));
   }
 
   public function testLocaleUpdateDevelopmentRelease() {
diff --git a/core/modules/locale/src/Tests/LocaleUpdateInterfaceTest.php b/core/modules/locale/src/Tests/LocaleUpdateInterfaceTest.php
index 45740acbc31ae8887a35c7abd2d3c6fa5b56efb1..32928b1d8bf3ec39b9f2f7f425053ecd7e979f72 100644
--- a/core/modules/locale/src/Tests/LocaleUpdateInterfaceTest.php
+++ b/core/modules/locale/src/Tests/LocaleUpdateInterfaceTest.php
@@ -17,14 +17,14 @@ class LocaleUpdateInterfaceTest extends LocaleUpdateBase {
    *
    * @var array
    */
-  public static $modules = array('locale_test_translate');
+  public static $modules = ['locale_test_translate'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'translate interface'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'translate interface']);
     $this->drupalLogin($admin_user);
   }
 
@@ -41,7 +41,7 @@ public function testInterface() {
     $this->assertNoText(t('Translation update status'), 'No status message');
 
     $this->drupalGet('admin/reports/translations');
-    $this->assertRaw(t('No translatable languages available. <a href=":add_language">Add a language</a> first.', array(':add_language' => \Drupal::url('entity.configurable_language.collection'))), 'Language message');
+    $this->assertRaw(t('No translatable languages available. <a href=":add_language">Add a language</a> first.', [':add_language' => \Drupal::url('entity.configurable_language.collection')]), 'Language message');
 
     // Add German language.
     $this->addLanguage('de');
@@ -66,9 +66,9 @@ public function testInterface() {
     // Check if updates are available for German.
     $this->drupalGet('admin/reports/status');
     $this->assertText(t('Translation update status'), 'Status message');
-    $this->assertRaw(t('Updates available for: @languages. See the <a href=":updates">Available translation updates</a> page for more information.', array('@languages' => t('German'), ':updates' => \Drupal::url('locale.translate_status'))), 'Updates available message');
+    $this->assertRaw(t('Updates available for: @languages. See the <a href=":updates">Available translation updates</a> page for more information.', ['@languages' => t('German'), ':updates' => \Drupal::url('locale.translate_status')]), 'Updates available message');
     $this->drupalGet('admin/reports/translations');
-    $this->assertText(t('Updates for: @modules', array('@modules' => 'Locale test translate')), 'Translations available');
+    $this->assertText(t('Updates for: @modules', ['@modules' => 'Locale test translate']), 'Translations available');
 
     // Set locale_test_translate module to have a dev release and no
     // translation found.
@@ -80,13 +80,13 @@ public function testInterface() {
     // Check if no updates were found.
     $this->drupalGet('admin/reports/status');
     $this->assertText(t('Translation update status'), 'Status message');
-    $this->assertRaw(t('Missing translations for: @languages. See the <a href=":updates">Available translation updates</a> page for more information.', array('@languages' => t('German'), ':updates' => \Drupal::url('locale.translate_status'))), 'Missing translations message');
+    $this->assertRaw(t('Missing translations for: @languages. See the <a href=":updates">Available translation updates</a> page for more information.', ['@languages' => t('German'), ':updates' => \Drupal::url('locale.translate_status')]), 'Missing translations message');
     $this->drupalGet('admin/reports/translations');
     $this->assertText(t('Missing translations for one project'), 'No translations found');
     $release_details = new FormattableMarkup('@module (@version). @info', [
       '@module' => 'Locale test translate',
       '@version' => '1.3-dev',
-      '@info' => t('File not found at %local_path', array('%local_path' => 'core/modules/locale/tests/test.de.po'))
+      '@info' => t('File not found at %local_path', ['%local_path' => 'core/modules/locale/tests/test.de.po'])
     ]);
     $this->assertRaw($release_details->__toString(), 'Release details');
 
@@ -100,7 +100,7 @@ public function testInterface() {
     // Check if Drupal core is not translated.
     $this->drupalGet('admin/reports/translations');
     $this->assertText(t('Missing translations for 2 projects'), 'No translations found');
-    $this->assertText(t('@module (@version).', array('@module' => t('Drupal core'), '@version' => '8.1.1')), 'Release details');
+    $this->assertText(t('@module (@version).', ['@module' => t('Drupal core'), '@version' => '8.1.1']), 'Release details');
 
     // Override Drupal core translation status as 'translations available'.
     $status = locale_translation_get_status();
@@ -111,8 +111,8 @@ public function testInterface() {
 
     // Check if translations are available for Drupal core.
     $this->drupalGet('admin/reports/translations');
-    $this->assertText(t('Updates for: @project', array('@project' => t('Drupal core'))), 'Translations found');
-    $this->assertText(SafeMarkup::format('@module (@date)', array('@module' => t('Drupal core'), '@date' => format_date(REQUEST_TIME, 'html_date'))), 'Core translation update');
+    $this->assertText(t('Updates for: @project', ['@project' => t('Drupal core')]), 'Translations found');
+    $this->assertText(SafeMarkup::format('@module (@date)', ['@module' => t('Drupal core'), '@date' => format_date(REQUEST_TIME, 'html_date')]), 'Core translation update');
     $update_button = $this->xpath('//input[@type="submit"][@value="' . t('Update translations') . '"]');
     $this->assertTrue($update_button, 'Update translations button');
   }
diff --git a/core/modules/locale/src/Tests/LocaleUpdateTest.php b/core/modules/locale/src/Tests/LocaleUpdateTest.php
index 999f01bb0e12e388d2c467a3b812c8a1e59f3eec..957419b721530a72b8a28360355595a7666c6367 100644
--- a/core/modules/locale/src/Tests/LocaleUpdateTest.php
+++ b/core/modules/locale/src/Tests/LocaleUpdateTest.php
@@ -18,7 +18,7 @@ protected function setUp() {
     parent::setUp();
     module_load_include('compare.inc', 'locale');
     module_load_include('fetch.inc', 'locale');
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'translate interface'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer site configuration', 'administer languages', 'access administration pages', 'translate interface']);
     $this->drupalLogin($admin_user);
     // We use German as test language. This language must match the translation
     // file that come with the locale_test module (test.de.po) and can therefore
@@ -42,7 +42,7 @@ public function testUpdateProjects() {
     $projects = locale_translation_project_list();
     $this->assertFalse(isset($projects['locale_test_translate']), 'Hidden module not found');
     $this->assertEqual($projects['locale_test']['info']['interface translation server pattern'], 'core/modules/locale/test/test.%language.po', 'Interface translation parameter found in project info.');
-    $this->assertEqual($projects['locale_test']['name'], 'locale_test', format_string('%key found in project info.', array('%key' => 'interface translation project')));
+    $this->assertEqual($projects['locale_test']['name'], 'locale_test', format_string('%key found in project info.', ['%key' => 'interface translation project']));
   }
 
   /**
@@ -74,9 +74,9 @@ public function testUpdateCheckStatus() {
     $config->set('translation.default_filename', '%project-%version.%language._po')->save();
 
     // Set the test conditions.
-    $edit = array(
+    $edit = [
       'use_source' => LOCALE_TRANSLATION_USE_SOURCE_LOCAL,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate/settings', $edit, t('Save configuration'));
 
     // Get status of translation sources at local file system.
@@ -90,9 +90,9 @@ public function testUpdateCheckStatus() {
     $this->assertEqual($result['custom_module_one']['de']->type, LOCALE_TRANSLATION_LOCAL, 'Translation of custom_module_one found');
 
     // Set the test conditions.
-    $edit = array(
+    $edit = [
       'use_source' => LOCALE_TRANSLATION_USE_SOURCE_REMOTE_AND_LOCAL,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate/settings', $edit, t('Save configuration'));
 
     // Get status of translation sources at both local and remote locations.
@@ -124,10 +124,10 @@ public function testUpdateImportSourceRemote() {
     $config->set('translation.default_filename', '%project-%version.%language._po');
 
     // Set the update conditions for this test.
-    $edit = array(
+    $edit = [
       'use_source' => LOCALE_TRANSLATION_USE_SOURCE_REMOTE_AND_LOCAL,
       'overwrite' => LOCALE_TRANSLATION_OVERWRITE_ALL,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate/settings', $edit, t('Save configuration'));
 
     // Get the translation status.
@@ -140,7 +140,7 @@ public function testUpdateImportSourceRemote() {
     $this->assertText('Contributed module two (' . format_date($this->timestampNew, 'html_date') . ')', 'Updates for Contrib module two');
 
     // Execute the translation update.
-    $this->drupalPostForm('admin/reports/translations', array(), t('Update translations'));
+    $this->drupalPostForm('admin/reports/translations', [], t('Update translations'));
 
     // Check if the translation has been updated, using the status cache.
     $status = locale_translation_get_status();
@@ -161,13 +161,13 @@ public function testUpdateImportSourceRemote() {
     $this->assertEqual($history['contrib_module_three']['de']->last_checked, $this->timestampMedium, 'Translation of contrib_module_three is not updated');
 
     // Check whether existing translations have (not) been overwritten.
-    $this->assertEqual(t('January', array(), array('langcode' => 'de')), 'Januar_1', 'Translation of January');
-    $this->assertEqual(t('February', array(), array('langcode' => 'de')), 'Februar_2', 'Translation of February');
-    $this->assertEqual(t('March', array(), array('langcode' => 'de')), 'Marz_2', 'Translation of March');
-    $this->assertEqual(t('April', array(), array('langcode' => 'de')), 'April_2', 'Translation of April');
-    $this->assertEqual(t('May', array(), array('langcode' => 'de')), 'Mai_customized', 'Translation of May');
-    $this->assertEqual(t('June', array(), array('langcode' => 'de')), 'Juni', 'Translation of June');
-    $this->assertEqual(t('Monday', array(), array('langcode' => 'de')), 'Montag', 'Translation of Monday');
+    $this->assertEqual(t('January', [], ['langcode' => 'de']), 'Januar_1', 'Translation of January');
+    $this->assertEqual(t('February', [], ['langcode' => 'de']), 'Februar_2', 'Translation of February');
+    $this->assertEqual(t('March', [], ['langcode' => 'de']), 'Marz_2', 'Translation of March');
+    $this->assertEqual(t('April', [], ['langcode' => 'de']), 'April_2', 'Translation of April');
+    $this->assertEqual(t('May', [], ['langcode' => 'de']), 'Mai_customized', 'Translation of May');
+    $this->assertEqual(t('June', [], ['langcode' => 'de']), 'Juni', 'Translation of June');
+    $this->assertEqual(t('Monday', [], ['langcode' => 'de']), 'Montag', 'Translation of Monday');
   }
 
   /**
@@ -186,15 +186,15 @@ public function testUpdateImportSourceLocal() {
     $config->set('translation.default_filename', '%project-%version.%language._po');
 
     // Set the update conditions for this test.
-    $edit = array(
+    $edit = [
       'use_source' => LOCALE_TRANSLATION_USE_SOURCE_LOCAL,
       'overwrite' => LOCALE_TRANSLATION_OVERWRITE_ALL,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate/settings', $edit, t('Save configuration'));
 
     // Execute the translation update.
     $this->drupalGet('admin/reports/translations/check');
-    $this->drupalPostForm('admin/reports/translations', array(), t('Update translations'));
+    $this->drupalPostForm('admin/reports/translations', [], t('Update translations'));
 
     // Check if the translation has been updated, using the status cache.
     $status = locale_translation_get_status();
@@ -215,13 +215,13 @@ public function testUpdateImportSourceLocal() {
     $this->assertEqual($history['contrib_module_three']['de']->last_checked, $this->timestampMedium, 'Translation of contrib_module_three is not updated');
 
     // Check whether existing translations have (not) been overwritten.
-    $this->assertEqual(t('January', array(), array('langcode' => 'de')), 'Januar_customized', 'Translation of January');
-    $this->assertEqual(t('February', array(), array('langcode' => 'de')), 'Februar_2', 'Translation of February');
-    $this->assertEqual(t('March', array(), array('langcode' => 'de')), 'Marz_2', 'Translation of March');
-    $this->assertEqual(t('April', array(), array('langcode' => 'de')), 'April_2', 'Translation of April');
-    $this->assertEqual(t('May', array(), array('langcode' => 'de')), 'Mai_customized', 'Translation of May');
-    $this->assertEqual(t('June', array(), array('langcode' => 'de')), 'Juni', 'Translation of June');
-    $this->assertEqual(t('Monday', array(), array('langcode' => 'de')), 'Montag', 'Translation of Monday');
+    $this->assertEqual(t('January', [], ['langcode' => 'de']), 'Januar_customized', 'Translation of January');
+    $this->assertEqual(t('February', [], ['langcode' => 'de']), 'Februar_2', 'Translation of February');
+    $this->assertEqual(t('March', [], ['langcode' => 'de']), 'Marz_2', 'Translation of March');
+    $this->assertEqual(t('April', [], ['langcode' => 'de']), 'April_2', 'Translation of April');
+    $this->assertEqual(t('May', [], ['langcode' => 'de']), 'Mai_customized', 'Translation of May');
+    $this->assertEqual(t('June', [], ['langcode' => 'de']), 'Juni', 'Translation of June');
+    $this->assertEqual(t('Monday', [], ['langcode' => 'de']), 'Montag', 'Translation of Monday');
   }
 
   /**
@@ -240,24 +240,24 @@ public function testUpdateImportModeNonCustomized() {
     $config->set('translation.default_filename', '%project-%version.%language._po');
 
     // Set the test conditions.
-    $edit = array(
+    $edit = [
       'use_source' => LOCALE_TRANSLATION_USE_SOURCE_REMOTE_AND_LOCAL,
       'overwrite' => LOCALE_TRANSLATION_OVERWRITE_NON_CUSTOMIZED,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate/settings', $edit, t('Save configuration'));
 
     // Execute translation update.
     $this->drupalGet('admin/reports/translations/check');
-    $this->drupalPostForm('admin/reports/translations', array(), t('Update translations'));
+    $this->drupalPostForm('admin/reports/translations', [], t('Update translations'));
 
     // Check whether existing translations have (not) been overwritten.
-    $this->assertEqual(t('January', array(), array('langcode' => 'de')), 'Januar_customized', 'Translation of January');
-    $this->assertEqual(t('February', array(), array('langcode' => 'de')), 'Februar_customized', 'Translation of February');
-    $this->assertEqual(t('March', array(), array('langcode' => 'de')), 'Marz_2', 'Translation of March');
-    $this->assertEqual(t('April', array(), array('langcode' => 'de')), 'April_2', 'Translation of April');
-    $this->assertEqual(t('May', array(), array('langcode' => 'de')), 'Mai_customized', 'Translation of May');
-    $this->assertEqual(t('June', array(), array('langcode' => 'de')), 'Juni', 'Translation of June');
-    $this->assertEqual(t('Monday', array(), array('langcode' => 'de')), 'Montag', 'Translation of Monday');
+    $this->assertEqual(t('January', [], ['langcode' => 'de']), 'Januar_customized', 'Translation of January');
+    $this->assertEqual(t('February', [], ['langcode' => 'de']), 'Februar_customized', 'Translation of February');
+    $this->assertEqual(t('March', [], ['langcode' => 'de']), 'Marz_2', 'Translation of March');
+    $this->assertEqual(t('April', [], ['langcode' => 'de']), 'April_2', 'Translation of April');
+    $this->assertEqual(t('May', [], ['langcode' => 'de']), 'Mai_customized', 'Translation of May');
+    $this->assertEqual(t('June', [], ['langcode' => 'de']), 'Juni', 'Translation of June');
+    $this->assertEqual(t('Monday', [], ['langcode' => 'de']), 'Montag', 'Translation of Monday');
   }
 
   /**
@@ -276,15 +276,15 @@ public function testUpdateImportModeNone() {
     $config->set('translation.default_filename', '%project-%version.%language._po');
 
     // Set the test conditions.
-    $edit = array(
+    $edit = [
       'use_source' => LOCALE_TRANSLATION_USE_SOURCE_REMOTE_AND_LOCAL,
       'overwrite' => LOCALE_TRANSLATION_OVERWRITE_NONE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate/settings', $edit, t('Save configuration'));
 
     // Execute translation update.
     $this->drupalGet('admin/reports/translations/check');
-    $this->drupalPostForm('admin/reports/translations', array(), t('Update translations'));
+    $this->drupalPostForm('admin/reports/translations', [], t('Update translations'));
 
     // Check whether existing translations have (not) been overwritten.
     $this->assertTranslation('January', 'Januar_customized', 'de');
@@ -307,21 +307,21 @@ public function testEnableUninstallModule() {
     $this->assertTranslation('Tuesday', '', 'de');
 
     // Enable a module.
-    $edit = array(
+    $edit = [
       'modules[locale_test_translate][enable]' => 'locale_test_translate',
-    );
+    ];
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
 
     // Check if translations have been imported.
     $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.',
-      array('%number' => 7, '%update' => 0, '%delete' => 0)), 'One translation file imported.');
+      ['%number' => 7, '%update' => 0, '%delete' => 0]), 'One translation file imported.');
     $this->assertTranslation('Tuesday', 'Dienstag', 'de');
 
-    $edit = array(
+    $edit = [
       'uninstall[locale_test_translate]' => 1,
-    );
+    ];
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
-    $this->drupalPostForm(NULL, array(), t('Uninstall'));
+    $this->drupalPostForm(NULL, [], t('Uninstall'));
 
     // Check if the file data is removed from the database.
     $history = locale_translation_get_file_history();
@@ -342,9 +342,9 @@ public function testEnableLanguage() {
     \Drupal::state()->set('locale.test_system_info_alter', TRUE);
 
     // Enable a module.
-    $edit = array(
+    $edit = [
       'modules[locale_test_translate][enable]' => 'locale_test_translate',
-    );
+    ];
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
 
     // Check if there is no Dutch translation yet.
@@ -352,14 +352,14 @@ public function testEnableLanguage() {
     $this->assertTranslation('Tuesday', 'Dienstag', 'de');
 
     // Add a language.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'nl',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Check if the right number of translations are added.
     $this->assertRaw(t('One translation file imported. %number translations were added, %update translations were updated and %delete translations were removed.',
-      array('%number' => 8, '%update' => 0, '%delete' => 0)), 'One language added.');
+      ['%number' => 8, '%update' => 0, '%delete' => 0]), 'One language added.');
     $this->assertTranslation('Extraday', 'extra dag', 'nl');
 
     // Check if the language data is added to the database.
@@ -367,7 +367,7 @@ public function testEnableLanguage() {
     $this->assertTrue($result, 'Files added to file history');
 
     // Remove a language.
-    $this->drupalPostForm('admin/config/regional/language/delete/nl', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/language/delete/nl', [], t('Delete'));
 
     // Check if the language data is removed from the database.
     $result = db_query("SELECT project FROM {locale_file} WHERE langcode='nl'")->fetchField();
@@ -386,21 +386,21 @@ public function testEnableCustomLanguage() {
     \Drupal::state()->set('locale.test_system_info_alter', TRUE);
 
     // Enable a module.
-    $edit = array(
+    $edit = [
       'modules[locale_test_translate][enable]' => 'locale_test_translate',
-    );
+    ];
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
 
     // Create a custom language with language code 'xx' and a random
     // name.
     $langcode = 'xx';
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
     // Ensure the translation file is automatically imported when the language
@@ -409,31 +409,31 @@ public function testEnableCustomLanguage() {
     $this->assertText(t('One translation string was skipped because of disallowed or malformed HTML'), 'Language file automatically imported.');
 
     // Ensure the strings were successfully imported.
-    $search = array(
+    $search = [
       'string' => 'lundi',
       'langcode' => $langcode,
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertNoText(t('No strings available.'), 'String successfully imported.');
 
     // Ensure the multiline string was imported.
-    $search = array(
+    $search = [
       'string' => 'Source string for multiline translation',
       'langcode' => $langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText('Multiline translation string to make sure that import works with it.', 'String successfully imported.');
 
     // Ensure 'Allowed HTML source string' was imported but the translation for
     // 'Another allowed HTML source string' was not because it contains invalid
     // HTML.
-    $search = array(
+    $search = [
       'string' => 'HTML source string',
       'langcode' => $langcode,
       'translation' => 'all',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertText('Allowed HTML source string', 'String successfully imported.');
     $this->assertNoText('Another allowed HTML source string', 'String with disallowed translation not imported.');
diff --git a/core/modules/locale/src/TranslationString.php b/core/modules/locale/src/TranslationString.php
index 917e874335b6673c01ac02d2f95facf397dca31d..63f4543cb5dc211f573994e16148db4fc4d9946c 100644
--- a/core/modules/locale/src/TranslationString.php
+++ b/core/modules/locale/src/TranslationString.php
@@ -42,7 +42,7 @@ class TranslationString extends StringBase {
   /**
    * {@inheritdoc}
    */
-  public function __construct($values = array()) {
+  public function __construct($values = []) {
     parent::__construct($values);
     if (!isset($this->isNew)) {
       // We mark the string as not new if it is a complete translation.
diff --git a/core/modules/locale/tests/modules/locale_test/locale_test.module b/core/modules/locale/tests/modules/locale_test/locale_test.module
index b59dfee8bf9e62c7e53e429a79c5934bd3443d02..89ba2bae9a30af86b5ef628222eabf89fdc6f8fb 100644
--- a/core/modules/locale/tests/modules/locale_test/locale_test.module
+++ b/core/modules/locale/tests/modules/locale_test/locale_test.module
@@ -57,10 +57,10 @@ function locale_test_locale_translation_projects_alter(&$projects) {
     $remote_url = $url . PublicStream::basePath() . '/remote/';
 
     // Completely replace the project data with a set of test projects.
-    $projects = array(
-      'contrib_module_one' => array(
+    $projects = [
+      'contrib_module_one' => [
         'name' => 'contrib_module_one',
-        'info' => array(
+        'info' => [
           'name' => 'Contributed module one',
           'interface translation server pattern' => $remote_url . '%core/%project/%project-%version.%language._po',
           'package' => 'Other',
@@ -68,14 +68,14 @@ function locale_test_locale_translation_projects_alter(&$projects) {
           'project' => 'contrib_module_one',
           'datestamp' => '1344471537',
           '_info_file_ctime' => 1348767306,
-        ),
+        ],
         'datestamp' => '1344471537',
         'project_type' => 'module',
         'project_status' => TRUE,
-      ),
-      'contrib_module_two' => array(
+      ],
+      'contrib_module_two' => [
         'name' => 'contrib_module_two',
-        'info' => array(
+        'info' => [
           'name' => 'Contributed module two',
           'interface translation server pattern' => $remote_url . '%core/%project/%project-%version.%language._po',
           'package' => 'Other',
@@ -83,14 +83,14 @@ function locale_test_locale_translation_projects_alter(&$projects) {
           'project' => 'contrib_module_two',
           'datestamp' => '1344471537',
           '_info_file_ctime' => 1348767306,
-        ),
+        ],
         'datestamp' => '1344471537',
         'project_type' => 'module',
         'project_status' => TRUE,
-      ),
-      'contrib_module_three' => array(
+      ],
+      'contrib_module_three' => [
         'name' => 'contrib_module_three',
-        'info' => array(
+        'info' => [
           'name' => 'Contributed module three',
           'interface translation server pattern' => $remote_url . '%core/%project/%project-%version.%language._po',
           'package' => 'Other',
@@ -98,14 +98,14 @@ function locale_test_locale_translation_projects_alter(&$projects) {
           'project' => 'contrib_module_three',
           'datestamp' => '1344471537',
           '_info_file_ctime' => 1348767306,
-        ),
+        ],
         'datestamp' => '1344471537',
         'project_type' => 'module',
         'project_status' => TRUE,
-      ),
-      'locale_test' => array(
+      ],
+      'locale_test' => [
         'name' => 'locale_test',
-        'info' => array(
+        'info' => [
           'name' => 'Locale test',
           'interface translation project' => 'locale_test',
           'interface translation server pattern' => 'core/modules/locale/tests/test.%language.po',
@@ -114,14 +114,14 @@ function locale_test_locale_translation_projects_alter(&$projects) {
           'project' => 'locale_test',
           '_info_file_ctime' => 1348767306,
           'datestamp' => 0,
-        ),
+        ],
         'datestamp' => 0,
         'project_type' => 'module',
         'project_status' => TRUE,
-      ),
-      'custom_module_one' => array(
+      ],
+      'custom_module_one' => [
         'name' => 'custom_module_one',
-        'info' => array(
+        'info' => [
           'name' => 'Custom module one',
           'interface translation project' => 'custom_module_one',
           'interface translation server pattern' => 'translations://custom_module_one.%language.po',
@@ -130,12 +130,12 @@ function locale_test_locale_translation_projects_alter(&$projects) {
           'project' => 'custom_module_one',
           '_info_file_ctime' => 1348767306,
           'datestamp' => 0,
-        ),
+        ],
         'datestamp' => 0,
         'project_type' => 'module',
         'project_status' => TRUE,
-      ),
-    );
+      ],
+    ];
   }
 }
 
diff --git a/core/modules/locale/tests/modules/locale_test_development_release/locale_test_development_release.module b/core/modules/locale/tests/modules/locale_test_development_release/locale_test_development_release.module
index deedf075b1db6b8fe32897d2df39ea331f4008e3..248d9e472ed3c3694d7453fb898391241826f2e1 100644
--- a/core/modules/locale/tests/modules/locale_test_development_release/locale_test_development_release.module
+++ b/core/modules/locale/tests/modules/locale_test_development_release/locale_test_development_release.module
@@ -27,14 +27,14 @@ function locale_test_development_release_system_info_alter(&$info, Extension $fi
 function locale_test_development_release_locale_translation_projects_alter(&$projects) {
   $projects['contrib'] = [
     'name' => 'contrib',
-    'info' => array(
+    'info' => [
       'name' => 'Contributed module',
       'package' => 'Other',
       'version' => '12.x-10.4-unstable11+14-dev',
       'project' => 'contrib_module',
       'datestamp' => '0',
       '_info_file_ctime' => 1442933959,
-    ),
+    ],
     'datestamp' => '0',
     'project_type' => 'module',
     'project_status' => TRUE,
diff --git a/core/modules/locale/tests/src/Functional/LocaleContentTest.php b/core/modules/locale/tests/src/Functional/LocaleContentTest.php
index d4561b91a7b77bfe5d39d4598a9e46222d1a7dbd..e7955503a437a9a87934f574c8caf1fc06a1139d 100644
--- a/core/modules/locale/tests/src/Functional/LocaleContentTest.php
+++ b/core/modules/locale/tests/src/Functional/LocaleContentTest.php
@@ -19,14 +19,14 @@ class LocaleContentTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'locale');
+  public static $modules = ['node', 'locale'];
 
   /**
    * Verifies that machine name fields are always LTR.
    */
   public function testMachineNameLTR() {
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'administer content types', 'access administration pages', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'administer content types', 'access administration pages', 'administer site configuration']);
 
     // Log in as admin.
     $this->drupalLogin($admin_user);
@@ -36,13 +36,13 @@ public function testMachineNameLTR() {
     $this->assertFieldByXpath('//input[@name="type" and @dir="ltr"]', NULL, 'The machine name field is LTR when no additional language is configured.');
 
     // Install the Arabic language (which is RTL) and configure as the default.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'ar';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
-    $edit = array(
+    $edit = [
       'site_default_language' => 'ar',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language', $edit, t('Save configuration'));
 
     // Verify that the machine name field is still LTR for a new content type.
@@ -58,9 +58,9 @@ public function testContentTypeLanguageConfiguration() {
     $type2 = $this->drupalCreateContentType();
 
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'administer content types', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'administer content types', 'access administration pages']);
     // User to create a node.
-    $web_user = $this->drupalCreateUser(array("create {$type1->id()} content", "create {$type2->id()} content", "edit any {$type2->id()} content"));
+    $web_user = $this->drupalCreateUser(["create {$type1->id()} content", "create {$type2->id()} content", "edit any {$type2->id()} content"]);
 
     // Add custom language.
     $this->drupalLogin($admin_user);
@@ -68,22 +68,22 @@ public function testContentTypeLanguageConfiguration() {
     $langcode = 'xx';
     // The English name for the language.
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
     // Set the content type to use multilingual support.
     $this->drupalGet("admin/structure/types/manage/{$type2->id()}");
     $this->assertText(t('Language settings'), 'Multilingual support widget present on content type configuration form.');
-    $edit = array(
+    $edit = [
       'language_configuration[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm("admin/structure/types/manage/{$type2->id()}", $edit, t('Save content type'));
-    $this->assertRaw(t('The content type %type has been updated.', array('%type' => $type2->label())));
+    $this->assertRaw(t('The content type %type has been updated.', ['%type' => $type2->label()]));
     $this->drupalLogout();
     \Drupal::languageManager()->reset();
 
@@ -103,26 +103,26 @@ public function testContentTypeLanguageConfiguration() {
     // Create a node.
     $node_title = $this->randomMachineName();
     $node_body = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'type' => $type2->id(),
       'title' => $node_title,
-      'body' => array(array('value' => $node_body)),
+      'body' => [['value' => $node_body]],
       'langcode' => $langcode,
-    );
+    ];
     $node = $this->drupalCreateNode($edit);
     // Edit the content and ensure correct language is selected.
     $path = 'node/' . $node->id() . '/edit';
     $this->drupalGet($path);
     $this->assertRaw('<option value="' . $langcode . '" selected="selected">' . $name . '</option>', 'Correct language selected.');
     // Ensure we can change the node language.
-    $edit = array(
+    $edit = [
       'langcode[0][value]' => 'en',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save'));
-    $this->assertText(t('@title has been updated.', array('@title' => $node_title)));
+    $this->assertText(t('@title has been updated.', ['@title' => $node_title]));
 
     // Verify that the creation message contains a link to a node.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'node/' . $node->id()));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'node/' . $node->id()]);
     $this->assert(isset($view_link), 'The message area contains the link to the edited node');
 
     $this->drupalLogout();
@@ -135,44 +135,44 @@ public function testContentTypeDirLang() {
     $type = $this->drupalCreateContentType();
 
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'administer content types', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'administer content types', 'access administration pages']);
     // User to create a node.
-    $web_user = $this->drupalCreateUser(array("create {$type->id()} content", "edit own {$type->id()} content"));
+    $web_user = $this->drupalCreateUser(["create {$type->id()} content", "edit own {$type->id()} content"]);
 
     // Log in as admin.
     $this->drupalLogin($admin_user);
 
     // Install Arabic language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'ar';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Install Spanish language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'es';
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
     \Drupal::languageManager()->reset();
 
     // Set the content type to use multilingual support.
     $this->drupalGet("admin/structure/types/manage/{$type->id()}");
-    $edit = array(
+    $edit = [
       'language_configuration[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm("admin/structure/types/manage/{$type->id()}", $edit, t('Save content type'));
-    $this->assertRaw(t('The content type %type has been updated.', array('%type' => $type->label())));
+    $this->assertRaw(t('The content type %type has been updated.', ['%type' => $type->label()]));
     $this->drupalLogout();
 
     // Log in as web user to add new node.
     $this->drupalLogin($web_user);
 
     // Create three nodes: English, Arabic and Spanish.
-    $nodes = array();
-    foreach (array('en', 'es', 'ar') as $langcode) {
-      $nodes[$langcode] = $this->drupalCreateNode(array(
+    $nodes = [];
+    foreach (['en', 'es', 'ar'] as $langcode) {
+      $nodes[$langcode] = $this->drupalCreateNode([
         'langcode' => $langcode,
         'type' => $type->id(),
         'promote' => NodeInterface::PROMOTED,
-      ));
+      ]);
     }
 
     // Check if English node does not have lang tag.
diff --git a/core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php b/core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php
index 2eeb2242fb20f56ecc115aa16b016c120a88bbe1..5f3e5f7e8008d1911e15466746c91498a2f5d327 100644
--- a/core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php
+++ b/core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php
@@ -17,7 +17,7 @@ class LocaleLocaleLookupTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale', 'locale_test');
+  public static $modules = ['locale', 'locale_test'];
 
   /**
    * {@inheritdoc}
@@ -37,7 +37,7 @@ protected function setUp() {
    */
   public function testCircularDependency() {
     // Ensure that we can enable early_translation_test on a non-english site.
-    $this->drupalPostForm('admin/modules', array('modules[early_translation_test][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[early_translation_test][enable]' => TRUE], t('Install'));
     $this->assertResponse(200);
   }
 
@@ -48,7 +48,7 @@ public function testLanguageFallbackDefaults() {
     $this->drupalGet('');
     // Ensure state of fallback languages persisted by
     // locale_test_language_fallback_candidates_locale_lookup_alter() is empty.
-    $this->assertEqual(\Drupal::state()->get('locale.test_language_fallback_candidates_locale_lookup_alter_candidates'), array());
+    $this->assertEqual(\Drupal::state()->get('locale.test_language_fallback_candidates_locale_lookup_alter_candidates'), []);
     // Make sure there is enough information provided for alter hooks.
     $context = \Drupal::state()->get('locale.test_language_fallback_candidates_locale_lookup_alter_context');
     $this->assertEqual($context['langcode'], 'fr');
diff --git a/core/modules/locale/tests/src/Functional/LocalePathTest.php b/core/modules/locale/tests/src/Functional/LocalePathTest.php
index fd263203a7e5d7826eb36738d4298eaac9b7b593..16cc26865e19e2f3265f1512c409240e627fd79b 100644
--- a/core/modules/locale/tests/src/Functional/LocalePathTest.php
+++ b/core/modules/locale/tests/src/Functional/LocalePathTest.php
@@ -18,7 +18,7 @@ class LocalePathTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'locale', 'path', 'views');
+  public static $modules = ['node', 'locale', 'path', 'views'];
 
   /**
    * {@inheritdoc}
@@ -26,7 +26,7 @@ class LocalePathTest extends BrowserTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
     $this->config('system.site')->set('page.front', '/node')->save();
   }
 
@@ -35,7 +35,7 @@ protected function setUp() {
    */
   public function testPathLanguageConfiguration() {
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'create page content', 'administer url aliases', 'create url aliases', 'access administration pages', 'access content overview'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'create page content', 'administer url aliases', 'create url aliases', 'access administration pages', 'access content overview']);
 
     // Add custom language.
     $this->drupalLogin($admin_user);
@@ -45,16 +45,16 @@ public function testPathLanguageConfiguration() {
     $name = $this->randomMachineName(16);
     // The domain prefix.
     $prefix = $langcode;
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
 
     // Set path prefix.
-    $edit = array("prefix[$langcode]" => $prefix);
+    $edit = ["prefix[$langcode]" => $prefix];
     $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, t('Save configuration'));
 
     // Check that the "xx" front page is readily available because path prefix
@@ -63,25 +63,25 @@ public function testPathLanguageConfiguration() {
     $this->assertText(t('Welcome to Drupal'), 'The "xx" front page is readibly available.');
 
     // Create a node.
-    $node = $this->drupalCreateNode(array('type' => 'page'));
+    $node = $this->drupalCreateNode(['type' => 'page']);
 
     // Create a path alias in default language (English).
     $path = 'admin/config/search/path/add';
     $english_path = $this->randomMachineName(8);
-    $edit = array(
+    $edit = [
       'source'   => '/node/' . $node->id(),
       'alias'    => '/' . $english_path,
       'langcode' => 'en',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save'));
 
     // Create a path alias in new custom language.
     $custom_language_path = $this->randomMachineName(8);
-    $edit = array(
+    $edit = [
       'source'   => '/node/' . $node->id(),
       'alias'    => '/' . $custom_language_path,
       'langcode' => $langcode,
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save'));
 
     // Confirm English language path alias works.
@@ -96,11 +96,11 @@ public function testPathLanguageConfiguration() {
     $custom_path = $this->randomMachineName(8);
 
     // Check priority of language for alias by source path.
-    $edit = array(
+    $edit = [
       'source'   => '/node/' . $node->id(),
       'alias'    => '/' . $custom_path,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    );
+    ];
     $this->container->get('path.alias_storage')->save($edit['source'], $edit['alias'], $edit['langcode']);
     $lookup_path = $this->container->get('path.alias_manager')->getAliasByPath('/node/' . $node->id(), 'en');
     $this->assertEqual('/' . $english_path, $lookup_path, 'English language alias has priority.');
@@ -110,32 +110,32 @@ public function testPathLanguageConfiguration() {
     $this->container->get('path.alias_storage')->delete($edit);
 
     // Create language nodes to check priority of aliases.
-    $first_node = $this->drupalCreateNode(array('type' => 'page', 'promote' => 1, 'langcode' => 'en'));
-    $second_node = $this->drupalCreateNode(array('type' => 'page', 'promote' => 1, 'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED));
+    $first_node = $this->drupalCreateNode(['type' => 'page', 'promote' => 1, 'langcode' => 'en']);
+    $second_node = $this->drupalCreateNode(['type' => 'page', 'promote' => 1, 'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED]);
 
     // Assign a custom path alias to the first node with the English language.
-    $edit = array(
+    $edit = [
       'source'   => '/node/' . $first_node->id(),
       'alias'    => '/' . $custom_path,
       'langcode' => $first_node->language()->getId(),
-    );
+    ];
     $this->container->get('path.alias_storage')->save($edit['source'], $edit['alias'], $edit['langcode']);
 
     // Assign a custom path alias to second node with
     // LanguageInterface::LANGCODE_NOT_SPECIFIED.
-    $edit = array(
+    $edit = [
       'source'   => '/node/' . $second_node->id(),
       'alias'    => '/' . $custom_path,
       'langcode' => $second_node->language()->getId(),
-    );
+    ];
     $this->container->get('path.alias_storage')->save($edit['source'], $edit['alias'], $edit['langcode']);
 
     // Test that both node titles link to our path alias.
     $this->drupalGet('admin/content');
     $custom_path_url = Url::fromUserInput('/' . $custom_path)->toString();
-    $elements = $this->xpath('//a[@href=:href and normalize-space(text())=:title]', array(':href' => $custom_path_url, ':title' => $first_node->label()));
+    $elements = $this->xpath('//a[@href=:href and normalize-space(text())=:title]', [':href' => $custom_path_url, ':title' => $first_node->label()]);
     $this->assertTrue(!empty($elements), 'First node links to the path alias.');
-    $elements = $this->xpath('//a[@href=:href and normalize-space(text())=:title]', array(':href' => $custom_path_url, ':title' => $second_node->label()));
+    $elements = $this->xpath('//a[@href=:href and normalize-space(text())=:title]', [':href' => $custom_path_url, ':title' => $second_node->label()]);
     $this->assertTrue(!empty($elements), 'Second node links to the path alias.');
 
     // Confirm that the custom path leads to the first node.
diff --git a/core/modules/locale/tests/src/Functional/LocaleStringTest.php b/core/modules/locale/tests/src/Functional/LocaleStringTest.php
index 082515fbb63ec5bc17ab3cb2c9df44fbb5117ed8..601b7388e610838e93d20ae34859da10508d97ad 100644
--- a/core/modules/locale/tests/src/Functional/LocaleStringTest.php
+++ b/core/modules/locale/tests/src/Functional/LocaleStringTest.php
@@ -17,7 +17,7 @@ class LocaleStringTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale');
+  public static $modules = ['locale'];
 
   /**
    * The locale storage.
@@ -34,7 +34,7 @@ protected function setUp() {
     // Add a default locale storage for all these tests.
     $this->storage = $this->container->get('locale.storage');
     // Create two languages: Spanish and German.
-    foreach (array('es', 'de') as $langcode) {
+    foreach (['es', 'de'] as $langcode) {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
   }
@@ -46,51 +46,51 @@ public function testStringCRUDAPI() {
     // Create source string.
     $source = $this->buildSourceString();
     $source->save();
-    $this->assertTrue($source->lid, format_string('Successfully created string %string', array('%string' => $source->source)));
+    $this->assertTrue($source->lid, format_string('Successfully created string %string', ['%string' => $source->source]));
 
     // Load strings by lid and source.
-    $string1 = $this->storage->findString(array('lid' => $source->lid));
+    $string1 = $this->storage->findString(['lid' => $source->lid]);
     $this->assertEqual($source, $string1, 'Successfully retrieved string by identifier.');
-    $string2 = $this->storage->findString(array('source' => $source->source, 'context' => $source->context));
+    $string2 = $this->storage->findString(['source' => $source->source, 'context' => $source->context]);
     $this->assertEqual($source, $string2, 'Successfully retrieved string by source and context.');
-    $string3 = $this->storage->findString(array('source' => $source->source, 'context' => ''));
+    $string3 = $this->storage->findString(['source' => $source->source, 'context' => '']);
     $this->assertFalse($string3, 'Cannot retrieve string with wrong context.');
 
     // Check version handling and updating.
     $this->assertEqual($source->version, 'none', 'String originally created without version.');
-    $string = $this->storage->findTranslation(array('lid' => $source->lid));
+    $string = $this->storage->findTranslation(['lid' => $source->lid]);
     $this->assertEqual($string->version, \Drupal::VERSION, 'Checked and updated string version to Drupal version.');
 
     // Create translation and find it by lid and source.
     $langcode = 'es';
     $translation = $this->createTranslation($source, $langcode);
     $this->assertEqual($translation->customized, LOCALE_NOT_CUSTOMIZED, 'Translation created as not customized by default.');
-    $string1 = $this->storage->findTranslation(array('language' => $langcode, 'lid' => $source->lid));
+    $string1 = $this->storage->findTranslation(['language' => $langcode, 'lid' => $source->lid]);
     $this->assertEqual($string1->translation, $translation->translation, 'Successfully loaded translation by string identifier.');
-    $string2 = $this->storage->findTranslation(array('language' => $langcode, 'source' => $source->source, 'context' => $source->context));
+    $string2 = $this->storage->findTranslation(['language' => $langcode, 'source' => $source->source, 'context' => $source->context]);
     $this->assertEqual($string2->translation, $translation->translation, 'Successfully loaded translation by source and context.');
     $translation
       ->setCustomized()
       ->save();
-    $translation = $this->storage->findTranslation(array('language' => $langcode, 'lid' => $source->lid));
+    $translation = $this->storage->findTranslation(['language' => $langcode, 'lid' => $source->lid]);
     $this->assertEqual($translation->customized, LOCALE_CUSTOMIZED, 'Translation successfully marked as customized.');
 
     // Delete translation.
     $translation->delete();
-    $deleted = $this->storage->findTranslation(array('language' => $langcode, 'lid' => $source->lid));
+    $deleted = $this->storage->findTranslation(['language' => $langcode, 'lid' => $source->lid]);
     $this->assertFalse(isset($deleted->translation), 'Successfully deleted translation string.');
 
     // Create some translations and then delete string and all of its
     // translations.
     $lid = $source->lid;
     $this->createAllTranslations($source);
-    $search = $this->storage->getTranslations(array('lid' => $source->lid));
+    $search = $this->storage->getTranslations(['lid' => $source->lid]);
     $this->assertEqual(count($search), 3, 'Created and retrieved all translations for our source string.');
 
     $source->delete();
-    $string = $this->storage->findString(array('lid' => $lid));
+    $string = $this->storage->findString(['lid' => $lid]);
     $this->assertFalse($string, 'Successfully deleted source string.');
-    $deleted = $search = $this->storage->getTranslations(array('lid' => $lid));
+    $deleted = $search = $this->storage->getTranslations(['lid' => $lid]);
     $this->assertFalse($deleted, 'Successfully deleted all translation strings.');
 
     // Tests that locations of different types and arbitrary lengths can be
@@ -102,7 +102,7 @@ public function testStringCRUDAPI() {
     $source_string->addLocation('path', $location = $this->randomString(300));
     $source_string->save();
 
-    $rows = db_query('SELECT * FROM {locales_location} WHERE sid = :sid', array(':sid' => $source_string->lid))->fetchAllAssoc('type');
+    $rows = db_query('SELECT * FROM {locales_location} WHERE sid = :sid', [':sid' => $source_string->lid])->fetchAllAssoc('type');
     $this->assertEqual(count($rows), 4, '4 source locations have been persisted.');
     $this->assertEqual($rows['path']->name, substr($location, 0, 255), 'Too long location has been limited to 255 characters.');
   }
@@ -117,50 +117,50 @@ public function testStringSearchAPI() {
     // Source 2 will have all translations, customized.
     // Source 3 will have no translations.
     $prefix = $this->randomMachineName(100);
-    $source1 = $this->buildSourceString(array('source' => $prefix . $this->randomMachineName(100)))->save();
-    $source2 = $this->buildSourceString(array('source' => $prefix . $this->randomMachineName(100)))->save();
+    $source1 = $this->buildSourceString(['source' => $prefix . $this->randomMachineName(100)])->save();
+    $source2 = $this->buildSourceString(['source' => $prefix . $this->randomMachineName(100)])->save();
     $source3 = $this->buildSourceString()->save();
     // Load all source strings.
-    $strings = $this->storage->getStrings(array());
+    $strings = $this->storage->getStrings([]);
     $this->assertEqual(count($strings), 3, 'Found 3 source strings in the database.');
     // Load all source strings matching a given string.
-    $filter_options['filters'] = array('source' => $prefix);
-    $strings = $this->storage->getStrings(array(), $filter_options);
+    $filter_options['filters'] = ['source' => $prefix];
+    $strings = $this->storage->getStrings([], $filter_options);
     $this->assertEqual(count($strings), 2, 'Found 2 strings using some string filter.');
 
     // Not customized translations.
     $translate1 = $this->createAllTranslations($source1);
     // Customized translations.
-    $this->createAllTranslations($source2, array('customized' => LOCALE_CUSTOMIZED));
+    $this->createAllTranslations($source2, ['customized' => LOCALE_CUSTOMIZED]);
     // Try quick search function with different field combinations.
     $langcode = 'es';
-    $found = $this->storage->findTranslation(array('language' => $langcode, 'source' => $source1->source, 'context' => $source1->context));
+    $found = $this->storage->findTranslation(['language' => $langcode, 'source' => $source1->source, 'context' => $source1->context]);
     $this->assertTrue($found && isset($found->language) && isset($found->translation) && !$found->isNew(), 'Translation found searching by source and context.');
     $this->assertEqual($found->translation, $translate1[$langcode]->translation, 'Found the right translation.');
     // Now try a translation not found.
-    $found = $this->storage->findTranslation(array('language' => $langcode, 'source' => $source3->source, 'context' => $source3->context));
+    $found = $this->storage->findTranslation(['language' => $langcode, 'source' => $source3->source, 'context' => $source3->context]);
     $this->assertTrue($found && $found->lid == $source3->lid && !isset($found->translation) && $found->isNew(), 'Translation not found but source string found.');
 
     // Load all translations. For next queries we'll be loading only translated
     // strings.
-    $translations = $this->storage->getTranslations(array('translated' => TRUE));
+    $translations = $this->storage->getTranslations(['translated' => TRUE]);
     $this->assertEqual(count($translations), 2 * $language_count, 'Created and retrieved all translations for source strings.');
 
     // Load all customized translations.
-    $translations = $this->storage->getTranslations(array('customized' => LOCALE_CUSTOMIZED, 'translated' => TRUE));
+    $translations = $this->storage->getTranslations(['customized' => LOCALE_CUSTOMIZED, 'translated' => TRUE]);
     $this->assertEqual(count($translations), $language_count, 'Retrieved all customized translations for source strings.');
 
     // Load all Spanish customized translations.
-    $translations = $this->storage->getTranslations(array('language' => 'es', 'customized' => LOCALE_CUSTOMIZED, 'translated' => TRUE));
+    $translations = $this->storage->getTranslations(['language' => 'es', 'customized' => LOCALE_CUSTOMIZED, 'translated' => TRUE]);
     $this->assertEqual(count($translations), 1, 'Found only Spanish and customized translations.');
 
     // Load all source strings without translation (1).
-    $translations = $this->storage->getStrings(array('translated' => FALSE));
+    $translations = $this->storage->getStrings(['translated' => FALSE]);
     $this->assertEqual(count($translations), 1, 'Found 1 source string without translations.');
 
     // Load Spanish translations using string filter.
-    $filter_options['filters'] = array('source' => $prefix);
-    $translations = $this->storage->getTranslations(array('language' => 'es'), $filter_options);
+    $filter_options['filters'] = ['source' => $prefix];
+    $translations = $this->storage->getTranslations(['language' => 'es'], $filter_options);
     $this->assertEqual(count($translations), 2, 'Found 2 translations using some string filter.');
 
   }
@@ -171,18 +171,18 @@ public function testStringSearchAPI() {
    * @return \Drupal\locale\StringInterface
    *   A locale string.
    */
-  public function buildSourceString($values = array()) {
-    return $this->storage->createString($values += array(
+  public function buildSourceString($values = []) {
+    return $this->storage->createString($values += [
       'source' => $this->randomMachineName(100),
       'context' => $this->randomMachineName(20),
-    ));
+    ]);
   }
 
   /**
    * Creates translations for source string and all languages.
    */
-  public function createAllTranslations($source, $values = array()) {
-    $list = array();
+  public function createAllTranslations($source, $values = []) {
+    $list = [];
     /* @var $language_manager \Drupal\Core\Language\LanguageManagerInterface */
     $language_manager = $this->container->get('language_manager');
     foreach ($language_manager->getLanguages() as $language) {
@@ -194,12 +194,12 @@ public function createAllTranslations($source, $values = array()) {
   /**
    * Creates single translation for source string.
    */
-  public function createTranslation($source, $langcode, $values = array()) {
-    return $this->storage->createTranslation($values + array(
+  public function createTranslation($source, $langcode, $values = []) {
+    return $this->storage->createTranslation($values + [
       'lid' => $source->lid,
       'language' => $langcode,
       'translation' => $this->randomMachineName(100),
-    ))->save();
+    ])->save();
   }
 
 }
diff --git a/core/modules/locale/tests/src/Functional/LocaleTranslatedSchemaDefinitionTest.php b/core/modules/locale/tests/src/Functional/LocaleTranslatedSchemaDefinitionTest.php
index 4b1eb0a64021235542a082b833ab2ac1aaac678a..7efb73aad6bda0589bc7aefd7c075261fee7b907 100644
--- a/core/modules/locale/tests/src/Functional/LocaleTranslatedSchemaDefinitionTest.php
+++ b/core/modules/locale/tests/src/Functional/LocaleTranslatedSchemaDefinitionTest.php
@@ -17,7 +17,7 @@ class LocaleTranslatedSchemaDefinitionTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'locale', 'node');
+  public static $modules = ['language', 'locale', 'node'];
 
   /**
    * {@inheritdoc}
@@ -40,15 +40,15 @@ function testTranslatedSchemaDefinition() {
     /** @var \Drupal\locale\StringDatabaseStorage $stringStorage */
     $stringStorage = \Drupal::service('locale.storage');
 
-    $source = $stringStorage->createString(array(
+    $source = $stringStorage->createString([
       'source' => 'Revision ID',
-    ))->save();
+    ])->save();
 
-    $stringStorage->createTranslation(array(
+    $stringStorage->createTranslation([
       'lid' => $source->lid,
       'language' => 'fr',
       'translation' => 'Translated Revision ID',
-    ))->save();
+    ])->save();
 
     // Ensure that the field is translated when access through the API.
     $this->assertEqual('Translated Revision ID', \Drupal::entityManager()->getBaseFieldDefinitions('node')['vid']->getLabel());
@@ -62,10 +62,10 @@ function testTranslatedSchemaDefinition() {
    */
   function testTranslatedUpdate() {
     // Visit the update page to collect any strings that may be translatable.
-    $user = $this->drupalCreateUser(array('administer software updates'));
+    $user = $this->drupalCreateUser(['administer software updates']);
     $this->drupalLogin($user);
     $update_url = $GLOBALS['base_url'] . '/update.php';
-    $this->drupalGet($update_url, array('external' => TRUE));
+    $this->drupalGet($update_url, ['external' => TRUE]);
 
     /** @var \Drupal\locale\StringDatabaseStorage $stringStorage */
     $stringStorage = \Drupal::service('locale.storage');
@@ -73,17 +73,17 @@ function testTranslatedUpdate() {
 
     // Translate all source strings found.
     foreach ($sources as $source) {
-      $stringStorage->createTranslation(array(
+      $stringStorage->createTranslation([
         'lid' => $source->lid,
         'language' => 'fr',
         'translation' => $this->randomMachineName(100),
-      ))->save();
+      ])->save();
     }
 
     // Ensure that there are no updates just due to translations. Check for
     // markup and a link instead of specific text because text may be
     // translated.
-    $this->drupalGet($update_url . '/selection', array('external' => TRUE));
+    $this->drupalGet($update_url . '/selection', ['external' => TRUE]);
     $this->assertRaw('messages--status', 'No pending updates.');
     $this->assertNoLinkByHref('fr/update.php/run', 'No link to run updates.');
   }
diff --git a/core/modules/locale/tests/src/Kernel/LocaleConfigManagerTest.php b/core/modules/locale/tests/src/Kernel/LocaleConfigManagerTest.php
index c1ce1b78039161211468d0bf1fd73335e9324cfc..8389b6e9736a64069fa49f2d388a3da4ebe3ccfb 100644
--- a/core/modules/locale/tests/src/Kernel/LocaleConfigManagerTest.php
+++ b/core/modules/locale/tests/src/Kernel/LocaleConfigManagerTest.php
@@ -18,7 +18,7 @@ class LocaleConfigManagerTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'language', 'locale', 'locale_test', 'block');
+  public static $modules = ['system', 'language', 'locale', 'locale_test', 'block'];
 
   /**
    * This test creates simple config on the fly breaking schema checking.
@@ -31,8 +31,8 @@ class LocaleConfigManagerTest extends KernelTestBase {
    * Tests hasTranslation().
    */
   public function testHasTranslation() {
-    $this->installSchema('locale', array('locales_location', 'locales_source', 'locales_target'));
-    $this->installConfig(array('locale_test'));
+    $this->installSchema('locale', ['locales_location', 'locales_source', 'locales_target']);
+    $this->installConfig(['locale_test']);
     $locale_config_manager = \Drupal::service('locale.config_manager');
 
     $language = ConfigurableLanguage::createFromLangcode('de');
@@ -48,8 +48,8 @@ public function testHasTranslation() {
    * Tests getStringTranslation().
    */
   public function testGetStringTranslation() {
-    $this->installSchema('locale', array('locales_location', 'locales_source', 'locales_target'));
-    $this->installConfig(array('locale_test'));
+    $this->installSchema('locale', ['locales_location', 'locales_source', 'locales_target']);
+    $this->installConfig(['locale_test']);
 
     $locale_config_manager = \Drupal::service('locale.config_manager');
 
@@ -80,7 +80,7 @@ public function testGetDefaultConfigLangcode() {
     $simple_config->set('foo', 'bar')->save();
     $this->assertNull(\Drupal::service('locale.config_manager')->getDefaultConfigLangcode($simple_config->getName()), 'Simple config created through the API is not treated as shipped configuration.');
 
-    $block = Block::create(array(
+    $block = Block::create([
       'id' => 'test_default_config',
       'theme' => 'classy',
       'status' => TRUE,
@@ -94,7 +94,7 @@ public function testGetDefaultConfigLangcode() {
         'primary' => TRUE,
         'secondary' => TRUE,
       ],
-    ));
+    ]);
     $block->save();
 
     // Install the theme after creating the block as installing the theme will
diff --git a/core/modules/locale/tests/src/Kernel/LocaleConfigSubscriberForeignTest.php b/core/modules/locale/tests/src/Kernel/LocaleConfigSubscriberForeignTest.php
index a53c3cf81243eaac8e69093825fe74906148a9a3..e7a13fc713c7d1c40186e8be3bf688f84789f0e5 100644
--- a/core/modules/locale/tests/src/Kernel/LocaleConfigSubscriberForeignTest.php
+++ b/core/modules/locale/tests/src/Kernel/LocaleConfigSubscriberForeignTest.php
@@ -124,7 +124,7 @@ public function testEnglish() {
     $config_name = 'locale_test.translation';
     ConfigurableLanguage::createFromLangcode('en')->save();
     // Adding a language on the UI would normally call updateConfigTranslations.
-    $this->localeConfigManager->updateConfigTranslations(array($config_name), array('en'));
+    $this->localeConfigManager->updateConfigTranslations([$config_name], ['en']);
     $this->assertConfigOverride($config_name, 'test', 'English test', 'en');
 
     $this->configFactory->getEditable('locale.settings')->set('translate_english', TRUE)->save();
diff --git a/core/modules/locale/tests/src/Kernel/LocaleConfigSubscriberTest.php b/core/modules/locale/tests/src/Kernel/LocaleConfigSubscriberTest.php
index 013a9ea21742a323c2ebbfc9e5ae2a7881c0e742..3a12efdf247350ddb789bbacc569804d54a51233 100644
--- a/core/modules/locale/tests/src/Kernel/LocaleConfigSubscriberTest.php
+++ b/core/modules/locale/tests/src/Kernel/LocaleConfigSubscriberTest.php
@@ -182,7 +182,7 @@ public function testLocaleDeleteTranslation() {
    *   The language code.
    */
   protected function setUpNoTranslation($config_name, $key, $source, $langcode) {
-    $this->localeConfigManager->updateConfigTranslations(array($config_name), array($langcode));
+    $this->localeConfigManager->updateConfigTranslations([$config_name], [$langcode]);
     $this->assertNoConfigOverride($config_name, $key, $source, $langcode);
     $this->assertNoTranslation($config_name, $langcode);
   }
@@ -222,7 +222,7 @@ protected function setUpTranslation($config_name, $key, $source, $translation, $
       ->save();
     $this->configFactory->reset($config_name);
     $this->localeConfigManager->reset();
-    $this->localeConfigManager->updateConfigTranslations(array($config_name), array($langcode));
+    $this->localeConfigManager->updateConfigTranslations([$config_name], [$langcode]);
 
     if ($is_active) {
       $this->assertActiveConfig($config_name, $key, $translation, $langcode);
@@ -291,7 +291,7 @@ protected function saveLocaleTranslationData($config_name, $key, $source, $trans
       ->setString($translation)
       ->save();
     $this->localeConfigManager->reset();
-    $this->localeConfigManager->updateConfigTranslations(array($config_name), array($langcode));
+    $this->localeConfigManager->updateConfigTranslations([$config_name], [$langcode]);
     $this->configFactory->reset($config_name);
 
     if ($is_active) {
@@ -356,7 +356,7 @@ protected function deleteLocaleTranslationData($config_name, $key, $source_value
       ->getStringTranslation($config_name, $langcode, $source_value, '')
       ->delete();
     $this->localeConfigManager->reset();
-    $this->localeConfigManager->updateConfigTranslations(array($config_name), array($langcode));
+    $this->localeConfigManager->updateConfigTranslations([$config_name], [$langcode]);
     $this->configFactory->reset($config_name);
 
     $this->assertNoConfigOverride($config_name, $key, $source_value, $langcode);
diff --git a/core/modules/locale/tests/src/Kernel/Migrate/MigrateLocaleConfigsTest.php b/core/modules/locale/tests/src/Kernel/Migrate/MigrateLocaleConfigsTest.php
index 6216f78e49426f9c17dcf7f6ad1cd7bbd316490d..b4449184a3298bb5930dae8db338c5e5448892cd 100644
--- a/core/modules/locale/tests/src/Kernel/Migrate/MigrateLocaleConfigsTest.php
+++ b/core/modules/locale/tests/src/Kernel/Migrate/MigrateLocaleConfigsTest.php
@@ -17,7 +17,7 @@ class MigrateLocaleConfigsTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('locale', 'language');
+  public static $modules = ['locale', 'language'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/locale/tests/src/Unit/LocaleLookupTest.php b/core/modules/locale/tests/src/Unit/LocaleLookupTest.php
index 28487462348fb0b7684f90b25bf2213a1ae15e47..cbdd6deabb59776e5e0b2d7791bafde1393f1282 100644
--- a/core/modules/locale/tests/src/Unit/LocaleLookupTest.php
+++ b/core/modules/locale/tests/src/Unit/LocaleLookupTest.php
@@ -76,9 +76,9 @@ protected function setUp() {
     $this->user = $this->getMock('Drupal\Core\Session\AccountInterface');
     $this->user->expects($this->any())
       ->method('getRoles')
-      ->will($this->returnValue(array('anonymous')));
+      ->will($this->returnValue(['anonymous']));
 
-    $this->configFactory = $this->getConfigFactoryStub(array('locale.settings' => array('cache_strings' => FALSE)));
+    $this->configFactory = $this->getConfigFactoryStub(['locale.settings' => ['cache_strings' => FALSE]]);
 
     $this->languageManager = $this->getMock('Drupal\Core\Language\LanguageManagerInterface');
     $this->requestStack = new RequestStack();
@@ -94,15 +94,15 @@ protected function setUp() {
    * @covers ::resolveCacheMiss
    */
   public function testResolveCacheMissWithoutFallback() {
-    $args = array(
+    $args = [
       'language' => 'en',
       'source' => 'test',
       'context' => 'irrelevant',
-    );
+    ];
 
-    $result = (object) array(
+    $result = (object) [
       'translation' => 'test',
-    );
+    ];
 
     $this->cache->expects($this->once())
       ->method('get')
@@ -114,8 +114,8 @@ public function testResolveCacheMissWithoutFallback() {
       ->will($this->returnValue($result));
 
     $locale_lookup = $this->getMockBuilder('Drupal\locale\LocaleLookup')
-      ->setConstructorArgs(array('en', 'irrelevant', $this->storage, $this->cache, $this->lock, $this->configFactory, $this->languageManager, $this->requestStack))
-      ->setMethods(array('persist'))
+      ->setConstructorArgs(['en', 'irrelevant', $this->storage, $this->cache, $this->lock, $this->configFactory, $this->languageManager, $this->requestStack])
+      ->setMethods(['persist'])
       ->getMock();
     $locale_lookup->expects($this->never())
       ->method('persist');
@@ -133,46 +133,46 @@ public function testResolveCacheMissWithoutFallback() {
    */
   public function testResolveCacheMissWithFallback($langcode, $string, $context, $expected) {
     // These are fake words!
-    $translations = array(
-      'en' => array(
+    $translations = [
+      'en' => [
         'test' => 'test',
         'fake' => 'fake',
         'missing pl' => 'missing pl',
         'missing cs' => 'missing cs',
         'missing both' => 'missing both',
-      ),
-      'pl' => array(
+      ],
+      'pl' => [
         'test' => 'test po polsku',
         'fake' => 'ściema',
         'missing cs' => 'zaginiony czech',
-      ),
-      'cs' => array(
+      ],
+      'cs' => [
         'test' => 'test v české',
         'fake' => 'falešný',
         'missing pl' => 'chybějící pl',
-      ),
-    );
+      ],
+    ];
     $this->storage->expects($this->any())
       ->method('findTranslation')
       ->will($this->returnCallback(function ($argument) use ($translations) {
         if (isset($translations[$argument['language']][$argument['source']])) {
-          return (object) array('translation' => $translations[$argument['language']][$argument['source']]);
+          return (object) ['translation' => $translations[$argument['language']][$argument['source']]];
         }
         return TRUE;
       }));
 
     $this->languageManager->expects($this->any())
       ->method('getFallbackCandidates')
-      ->will($this->returnCallback(function (array $context = array()) {
+      ->will($this->returnCallback(function (array $context = []) {
         switch ($context['langcode']) {
           case 'pl':
-            return array('cs', 'en');
+            return ['cs', 'en'];
 
           case 'cs':
-            return array('en');
+            return ['en'];
 
           default:
-            return array();
+            return [];
         }
       }));
 
@@ -188,20 +188,20 @@ public function testResolveCacheMissWithFallback($langcode, $string, $context, $
    * Provides test data for testResolveCacheMissWithFallback().
    */
   public function resolveCacheMissWithFallbackProvider() {
-    return array(
-      array('cs', 'test', 'irrelevant', 'test v české'),
-      array('cs', 'fake', 'irrelevant', 'falešný'),
-      array('cs', 'missing pl', 'irrelevant', 'chybějící pl'),
-      array('cs', 'missing cs', 'irrelevant', 'missing cs'),
-      array('cs', 'missing both', 'irrelevant', 'missing both'),
+    return [
+      ['cs', 'test', 'irrelevant', 'test v české'],
+      ['cs', 'fake', 'irrelevant', 'falešný'],
+      ['cs', 'missing pl', 'irrelevant', 'chybějící pl'],
+      ['cs', 'missing cs', 'irrelevant', 'missing cs'],
+      ['cs', 'missing both', 'irrelevant', 'missing both'],
 
       // Testing PL with fallback to cs, en.
-      array('pl', 'test', 'irrelevant', 'test po polsku'),
-      array('pl', 'fake', 'irrelevant', 'ściema'),
-      array('pl', 'missing pl', 'irrelevant', 'chybějící pl'),
-      array('pl', 'missing cs', 'irrelevant', 'zaginiony czech'),
-      array('pl', 'missing both', 'irrelevant', 'missing both'),
-    );
+      ['pl', 'test', 'irrelevant', 'test po polsku'],
+      ['pl', 'fake', 'irrelevant', 'ściema'],
+      ['pl', 'missing pl', 'irrelevant', 'chybějící pl'],
+      ['pl', 'missing cs', 'irrelevant', 'zaginiony czech'],
+      ['pl', 'missing both', 'irrelevant', 'missing both'],
+    ];
   }
 
   /**
@@ -210,25 +210,25 @@ public function resolveCacheMissWithFallbackProvider() {
    * @covers ::resolveCacheMiss
    */
   public function testResolveCacheMissWithPersist() {
-    $args = array(
+    $args = [
       'language' => 'en',
       'source' => 'test',
       'context' => 'irrelevant',
-    );
+    ];
 
-    $result = (object) array(
+    $result = (object) [
       'translation' => 'test',
-    );
+    ];
 
     $this->storage->expects($this->once())
       ->method('findTranslation')
       ->with($this->equalTo($args))
       ->will($this->returnValue($result));
 
-    $this->configFactory = $this->getConfigFactoryStub(array('locale.settings' => array('cache_strings' => TRUE)));
+    $this->configFactory = $this->getConfigFactoryStub(['locale.settings' => ['cache_strings' => TRUE]]);
     $locale_lookup = $this->getMockBuilder('Drupal\locale\LocaleLookup')
-      ->setConstructorArgs(array('en', 'irrelevant', $this->storage, $this->cache, $this->lock, $this->configFactory, $this->languageManager, $this->requestStack))
-      ->setMethods(array('persist'))
+      ->setConstructorArgs(['en', 'irrelevant', $this->storage, $this->cache, $this->lock, $this->configFactory, $this->languageManager, $this->requestStack])
+      ->setMethods(['persist'])
       ->getMock();
     $locale_lookup->expects($this->once())
       ->method('persist');
@@ -257,8 +257,8 @@ public function testResolveCacheMissNoTranslation() {
     $this->requestStack->push($request);
 
     $locale_lookup = $this->getMockBuilder('Drupal\locale\LocaleLookup')
-      ->setConstructorArgs(array('en', 'irrelevant', $this->storage, $this->cache, $this->lock, $this->configFactory, $this->languageManager, $this->requestStack))
-      ->setMethods(array('persist'))
+      ->setConstructorArgs(['en', 'irrelevant', $this->storage, $this->cache, $this->lock, $this->configFactory, $this->languageManager, $this->requestStack])
+      ->setMethods(['persist'])
       ->getMock();
     $locale_lookup->expects($this->never())
       ->method('persist');
diff --git a/core/modules/locale/tests/src/Unit/Menu/LocaleLocalTasksTest.php b/core/modules/locale/tests/src/Unit/Menu/LocaleLocalTasksTest.php
index b6e4b59747a6abb94c77479237e14e9403a6f5f5..fced5cd66d578c08246cc163152fae20bede403a 100644
--- a/core/modules/locale/tests/src/Unit/Menu/LocaleLocalTasksTest.php
+++ b/core/modules/locale/tests/src/Unit/Menu/LocaleLocalTasksTest.php
@@ -15,9 +15,9 @@ class LocaleLocalTasksTest extends LocalTaskIntegrationTestBase {
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->directoryList = array(
+    $this->directoryList = [
       'locale' => 'core/modules/locale',
-    );
+    ];
     parent::setUp();
   }
 
@@ -27,9 +27,9 @@ protected function setUp() {
    * @dataProvider getLocalePageRoutes
    */
   public function testLocalePageLocalTasks($route) {
-    $tasks = array(
-      0 => array('locale.translate_page', 'locale.translate_import', 'locale.translate_export', 'locale.settings'),
-    );
+    $tasks = [
+      0 => ['locale.translate_page', 'locale.translate_import', 'locale.translate_export', 'locale.settings'],
+    ];
     $this->assertLocalTasks($route, $tasks);
   }
 
@@ -37,12 +37,12 @@ public function testLocalePageLocalTasks($route) {
    * Provides a list of routes to test.
    */
   public function getLocalePageRoutes() {
-    return array(
-      array('locale.translate_page'),
-      array('locale.translate_import'),
-      array('locale.translate_export'),
-      array('locale.settings'),
-    );
+    return [
+      ['locale.translate_page'],
+      ['locale.translate_import'],
+      ['locale.translate_export'],
+      ['locale.settings'],
+    ];
   }
 
 }
diff --git a/core/modules/menu_link_content/menu_link_content.module b/core/modules/menu_link_content/menu_link_content.module
index 98357c6cd50172d9df089d212d6610c825c2bb10..0e02ba948b508f7109dfaf3cd147737faf472edf 100644
--- a/core/modules/menu_link_content/menu_link_content.module
+++ b/core/modules/menu_link_content/menu_link_content.module
@@ -18,10 +18,10 @@ function menu_link_content_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<h3>' . t('About') . '</h3>';
       $output .= '<p>' . t('The Custom Menu Links module allows users to create menu links. These links can be translated if multiple languages are used for the site.');
       if (\Drupal::moduleHandler()->moduleExists('menu_ui')) {
-        $output .= ' ' . t('It is required by the Menu UI module, which provides an interface for managing menus and menu links. For more information, see the <a href=":menu-help">Menu UI module help page</a> and the <a href=":drupal-org-help">online documentation for the Custom Menu Links module</a>.', array(':menu-help' => \Drupal::url('help.page', array('name' => 'menu_ui')), ':drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link'));
+        $output .= ' ' . t('It is required by the Menu UI module, which provides an interface for managing menus and menu links. For more information, see the <a href=":menu-help">Menu UI module help page</a> and the <a href=":drupal-org-help">online documentation for the Custom Menu Links module</a>.', [':menu-help' => \Drupal::url('help.page', ['name' => 'menu_ui']), ':drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link']);
       }
       else {
-        $output .= ' ' . t('For more information, see the <a href=":drupal-org-help">online documentation for the Custom Menu Links module</a>. If you enable the Menu UI module, it provides an interface for managing menus and menu links.', array(':drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link'));
+        $output .= ' ' . t('For more information, see the <a href=":drupal-org-help">online documentation for the Custom Menu Links module</a>. If you enable the Menu UI module, it provides an interface for managing menus and menu links.', [':drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link']);
       }
       $output .= '</p>';
       return $output;
@@ -33,7 +33,7 @@ function menu_link_content_help($route_name, RouteMatchInterface $route_match) {
  */
 function menu_link_content_menu_delete(MenuInterface $menu) {
   $storage = \Drupal::entityManager()->getStorage('menu_link_content');
-  $menu_links = $storage->loadByProperties(array('menu_name' => $menu->id()));
+  $menu_links = $storage->loadByProperties(['menu_name' => $menu->id()]);
   $storage->delete($menu_links);
 }
 
diff --git a/core/modules/menu_link_content/src/Controller/MenuController.php b/core/modules/menu_link_content/src/Controller/MenuController.php
index 6aaae646cbc58e1bfc909b391eaeabb75a66c9ae..be7879f983e4277fb9d962216b8f0ceee0cd2d01 100644
--- a/core/modules/menu_link_content/src/Controller/MenuController.php
+++ b/core/modules/menu_link_content/src/Controller/MenuController.php
@@ -20,12 +20,12 @@ class MenuController extends ControllerBase {
    *   Returns the menu link creation form.
    */
   public function addLink(MenuInterface $menu) {
-    $menu_link = $this->entityManager()->getStorage('menu_link_content')->create(array(
+    $menu_link = $this->entityManager()->getStorage('menu_link_content')->create([
       'id' => '',
       'parent' => '',
       'menu_name' => $menu->id(),
       'bundle' => 'menu_link_content',
-    ));
+    ]);
     return $this->entityFormBuilder()->getForm($menu_link);
   }
 
diff --git a/core/modules/menu_link_content/src/Entity/MenuLinkContent.php b/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
index d23f876bea42dff249581864facd08f5f065b9d3..d53ba4926591b518f0d083f6832e7030b8b4a4a2 100644
--- a/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
+++ b/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
@@ -133,7 +133,7 @@ public function getWeight() {
    * {@inheritdoc}
    */
   public function getPluginDefinition() {
-    $definition = array();
+    $definition = [];
     $definition['class'] = 'Drupal\menu_link_content\Plugin\Menu\MenuLinkContent';
     $definition['menu_name'] = $this->getMenuName();
 
@@ -155,7 +155,7 @@ public function getPluginDefinition() {
     $definition['description'] = $this->getDescription();
     $definition['weight'] = $this->getWeight();
     $definition['id'] = $this->getPluginId();
-    $definition['metadata'] = array('entity_id' => $this->id());
+    $definition['metadata'] = ['entity_id' => $this->id()];
     $definition['form_class'] = '\Drupal\menu_link_content\Form\MenuLinkContentForm';
     $definition['enabled'] = $this->isEnabled() ? 1 : 0;
     $definition['expanded'] = $this->isExpanded() ? 1 : 0;
@@ -256,15 +256,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setRequired(TRUE)
       ->setTranslatable(TRUE)
       ->setSetting('max_length', 255)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'string',
         'weight' => -5,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -5,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['description'] = BaseFieldDefinition::create('string')
@@ -272,15 +272,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setDescription(t('Shown when hovering over the menu link.'))
       ->setTranslatable(TRUE)
       ->setSetting('max_length', 255)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'string',
         'weight' => 0,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => 0,
-      ));
+      ]);
 
     $fields['menu_name'] = BaseFieldDefinition::create('string')
       ->setLabel(t('Menu name'))
@@ -292,14 +292,14 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('Link'))
       ->setDescription(t('The location this menu link points to.'))
       ->setRequired(TRUE)
-      ->setSettings(array(
+      ->setSettings([
         'link_type' => LinkItemInterface::LINK_GENERIC,
         'title' => DRUPAL_DISABLED,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'link_default',
         'weight' => -2,
-      ));
+      ]);
 
     $fields['external'] = BaseFieldDefinition::create('boolean')
       ->setLabel(t('External'))
@@ -314,43 +314,43 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('Weight'))
       ->setDescription(t('Link weight among links in the same menu at the same depth. In the menu, the links with high weight will sink and links with a low weight will be positioned nearer the top.'))
       ->setDefaultValue(0)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'integer',
         'weight' => 0,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'number',
         'weight' => 20,
-      ));
+      ]);
 
     $fields['expanded'] = BaseFieldDefinition::create('boolean')
       ->setLabel(t('Show as expanded'))
       ->setDescription(t('If selected and this menu link has children, the menu will always appear expanded.'))
       ->setDefaultValue(FALSE)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'boolean',
         'weight' => 0,
-      ))
-      ->setDisplayOptions('form', array(
-        'settings' => array('display_label' => TRUE),
+      ])
+      ->setDisplayOptions('form', [
+        'settings' => ['display_label' => TRUE],
         'weight' => 0,
-      ));
+      ]);
 
     $fields['enabled'] = BaseFieldDefinition::create('boolean')
       ->setLabel(t('Enabled'))
       ->setDescription(t('A flag for whether the link should be enabled in menus or hidden.'))
       ->setDefaultValue(TRUE)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'boolean',
         'weight' => 0,
-      ))
-      ->setDisplayOptions('form', array(
-        'settings' => array('display_label' => TRUE),
+      ])
+      ->setDisplayOptions('form', [
+        'settings' => ['display_label' => TRUE],
         'weight' => -1,
-      ));
+      ]);
 
     $fields['parent'] = BaseFieldDefinition::create('string')
       ->setLabel(t('Parent plugin ID'))
diff --git a/core/modules/menu_link_content/src/Form/MenuLinkContentDeleteForm.php b/core/modules/menu_link_content/src/Form/MenuLinkContentDeleteForm.php
index b4caaff467fbcfc32f026abc1735d1d7fd2197c5..2b780c9e029adc42c77d6155d5c15e5b4c20d2b4 100644
--- a/core/modules/menu_link_content/src/Form/MenuLinkContentDeleteForm.php
+++ b/core/modules/menu_link_content/src/Form/MenuLinkContentDeleteForm.php
@@ -15,7 +15,7 @@ class MenuLinkContentDeleteForm extends ContentEntityDeleteForm {
    */
   public function getCancelUrl() {
     if ($this->moduleHandler->moduleExists('menu_ui')) {
-      return new Url('entity.menu.edit_form', array('menu' => $this->entity->getMenuName()));
+      return new Url('entity.menu.edit_form', ['menu' => $this->entity->getMenuName()]);
     }
     return $this->entity->urlInfo();
   }
@@ -31,7 +31,7 @@ protected function getRedirectUrl() {
    * {@inheritdoc}
    */
   protected function getDeletionMessage() {
-    return $this->t('The menu link %title has been deleted.', array('%title' => $this->entity->label()));
+    return $this->t('The menu link %title has been deleted.', ['%title' => $this->entity->label()]);
   }
 
 }
diff --git a/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php b/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php
index 8a708ce52b2ed97c779191f5680cacd26c87fe27..4bdd6b9cfe0300dd9f7fe530a5694e752672a362 100644
--- a/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php
+++ b/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php
@@ -113,8 +113,8 @@ public function buildEntity(array $form, FormStateInterface $form_state) {
 
     $entity->parent->value = $parent;
     $entity->menu_name->value = $menu_name;
-    $entity->enabled->value = (!$form_state->isValueEmpty(array('enabled', 'value')));
-    $entity->expanded->value = (!$form_state->isValueEmpty(array('expanded', 'value')));
+    $entity->enabled->value = (!$form_state->isValueEmpty(['enabled', 'value']));
+    $entity->expanded->value = (!$form_state->isValueEmpty(['expanded', 'value']));
 
     return $entity;
   }
@@ -131,7 +131,7 @@ public function save(array $form, FormStateInterface $form_state) {
       drupal_set_message($this->t('The menu link has been saved.'));
       $form_state->setRedirect(
         'entity.menu_link_content.canonical',
-        array('menu_link_content' => $menu_link->id())
+        ['menu_link_content' => $menu_link->id()]
       );
     }
     else {
diff --git a/core/modules/menu_link_content/src/Plugin/Menu/MenuLinkContent.php b/core/modules/menu_link_content/src/Plugin/Menu/MenuLinkContent.php
index fea021121656daf01551781668c4463351086ac5..98e8cdfcb03c6591fb8bccad6d812e63f3fca294 100644
--- a/core/modules/menu_link_content/src/Plugin/Menu/MenuLinkContent.php
+++ b/core/modules/menu_link_content/src/Plugin/Menu/MenuLinkContent.php
@@ -21,12 +21,12 @@ class MenuLinkContent extends MenuLinkBase implements ContainerFactoryPluginInte
    *
    * @var array
    */
-  protected static $entityIdsToLoad = array();
+  protected static $entityIdsToLoad = [];
 
   /**
    * {@inheritdoc}
    */
-  protected $overrideAllowed = array(
+  protected $overrideAllowed = [
     'menu_name' => 1,
     'parent' => 1,
     'weight' => 1,
@@ -38,7 +38,7 @@ class MenuLinkContent extends MenuLinkBase implements ContainerFactoryPluginInte
     'route_parameters' => 1,
     'url' => 1,
     'options' => 1,
-  );
+  ];
 
   /**
    * The menu link content entity connected to this plugin instance.
@@ -123,12 +123,12 @@ protected function getEntity() {
         static::$entityIdsToLoad[$entity_id] = $entity_id;
         $entities = $storage->loadMultiple(array_values(static::$entityIdsToLoad));
         $entity = isset($entities[$entity_id]) ? $entities[$entity_id] : NULL;
-        static::$entityIdsToLoad = array();
+        static::$entityIdsToLoad = [];
       }
       if (!$entity) {
         // Fallback to the loading by the UUID.
         $uuid = $this->getUuid();
-        $loaded_entities = $storage->loadByProperties(array('uuid' => $uuid));
+        $loaded_entities = $storage->loadByProperties(['uuid' => $uuid]);
         $entity = reset($loaded_entities);
       }
       if (!$entity) {
diff --git a/core/modules/menu_link_content/src/Plugin/migrate/source/MenuLink.php b/core/modules/menu_link_content/src/Plugin/migrate/source/MenuLink.php
index 067b13313e20a8af144974b9b2deed0671f9d2b8..338d3ecef9c2e2a69f65f743c86b55d421c05972 100644
--- a/core/modules/menu_link_content/src/Plugin/migrate/source/MenuLink.php
+++ b/core/modules/menu_link_content/src/Plugin/migrate/source/MenuLink.php
@@ -39,7 +39,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'menu_name' => t("The menu name. All links with the same menu name (such as 'navigation') are part of the same menu."),
       'mlid' => t('The menu link ID (mlid) is the integer primary key.'),
       'plid' => t('The parent link ID (plid) is the mlid of the link above in the hierarchy, or zero if the link is at the top level in its menu.'),
@@ -65,7 +65,7 @@ public function fields() {
       'p8' => t('The eighth mlid in the materialized path. See p1.'),
       'p9' => t('The ninth mlid in the materialized path. See p1.'),
       'updated' => t('Flag that indicates that this link was generated during the update from Drupal 5.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/menu_link_content/src/Tests/MenuLinkContentFormTest.php b/core/modules/menu_link_content/src/Tests/MenuLinkContentFormTest.php
index 1bdc927f7e411de50abc4c38b9e9a25816a5c664..c8244fe089cf433c62fca0534ccd966874c433c3 100644
--- a/core/modules/menu_link_content/src/Tests/MenuLinkContentFormTest.php
+++ b/core/modules/menu_link_content/src/Tests/MenuLinkContentFormTest.php
@@ -16,16 +16,16 @@ class MenuLinkContentFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'menu_link_content',
-  );
+  ];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $web_user = $this->drupalCreateUser(array('administer menu'));
+    $web_user = $this->drupalCreateUser(['administer menu']);
     $this->drupalLogin($web_user);
   }
 
@@ -34,16 +34,16 @@ protected function setUp() {
    */
   public function testMenuLinkContentForm() {
     $this->drupalGet('admin/structure/menu/manage/admin/add');
-    $element = $this->xpath('//select[@id = :id]/option[@selected]', array(':id' => 'edit-menu-parent'));
+    $element = $this->xpath('//select[@id = :id]/option[@selected]', [':id' => 'edit-menu-parent']);
     $this->assertTrue($element, 'A default menu parent was found.');
     $this->assertEqual('admin:', $element[0]['value'], '<Administration> menu is the parent.');
 
     $this->drupalPostForm(
       NULL,
-      array(
+      [
         'title[0][value]' => t('Front page'),
         'link[0][uri]' => '<front>',
-      ),
+      ],
       t('Save')
     );
     $this->assertText(t('The menu link has been saved.'));
@@ -56,10 +56,10 @@ public function testMenuLinkContentFormValidation() {
     $this->drupalGet('admin/structure/menu/manage/admin/add');
     $this->drupalPostForm(
       NULL,
-      array(
+      [
         'title[0][value]' => t('Test page'),
         'link[0][uri]' => '<test>',
-      ),
+      ],
       t('Save')
     );
     $this->assertText(t('Manually entered paths should start with /, ? or #.'));
diff --git a/core/modules/menu_link_content/src/Tests/MenuLinkContentTranslationUITest.php b/core/modules/menu_link_content/src/Tests/MenuLinkContentTranslationUITest.php
index cf802b706bb655458282a64f62cac82872e35a70..4aeb637353088a4f4d1be6382e548199b027c86e 100644
--- a/core/modules/menu_link_content/src/Tests/MenuLinkContentTranslationUITest.php
+++ b/core/modules/menu_link_content/src/Tests/MenuLinkContentTranslationUITest.php
@@ -22,12 +22,12 @@ class MenuLinkContentTranslationUITest extends ContentTranslationUITestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'language',
     'content_translation',
     'menu_link_content',
     'menu_ui',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -42,14 +42,14 @@ protected function setUp() {
    * {@inheritdoc}
    */
   protected function getTranslatorPermissions() {
-    return array_merge(parent::getTranslatorPermissions(), array('administer menu'));
+    return array_merge(parent::getTranslatorPermissions(), ['administer menu']);
   }
 
   /**
    * {@inheritdoc}
    */
   protected function getAdministratorPermissions() {
-    return array_merge(parent::getAdministratorPermissions(), array('administer themes', 'view the administration theme'));
+    return array_merge(parent::getAdministratorPermissions(), ['administer themes', 'view the administration theme']);
   }
 
   /**
@@ -81,11 +81,11 @@ public function testTranslationLinkOnMenuEditForm() {
    */
   function testTranslationLinkTheme() {
     $this->drupalLogin($this->administrator);
-    $entityId = $this->createEntity(array(), 'en');
+    $entityId = $this->createEntity([], 'en');
 
     // Set up Seven as the admin theme to test.
-    $this->container->get('theme_handler')->install(array('seven'));
-    $edit = array();
+    $this->container->get('theme_handler')->install(['seven']);
+    $edit = [];
     $edit['admin_theme'] = 'seven';
     $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
     $this->drupalGet('admin/structure/menu/item/' . $entityId . '/edit');
@@ -107,14 +107,14 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
-        $title = t('@title [%language translation]', array(
+        $title = t('@title [%language translation]', [
           '@title' => $entity->getTranslation($langcode)->label(),
           '%language' => $languages[$langcode]->getName(),
-        ));
+        ]);
         $this->assertRaw($title);
       }
     }
diff --git a/core/modules/menu_link_content/tests/src/Functional/LinksTest.php b/core/modules/menu_link_content/tests/src/Functional/LinksTest.php
index 9047ac8839d28692b5f0f01b2259d9eac49cdb0c..14aa4f2d6c2e25a63885b9cd07b0d51f42866d32 100644
--- a/core/modules/menu_link_content/tests/src/Functional/LinksTest.php
+++ b/core/modules/menu_link_content/tests/src/Functional/LinksTest.php
@@ -19,7 +19,7 @@ class LinksTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('router_test', 'menu_link_content');
+  public static $modules = ['router_test', 'menu_link_content'];
 
   /**
    * The menu link plugin manager.
@@ -36,11 +36,11 @@ protected function setUp() {
 
     $this->menuLinkManager = \Drupal::service('plugin.manager.menu.link');
 
-    Menu::create(array(
+    Menu::create([
       'id' => 'menu_test',
       'label' => 'Test menu',
       'description' => 'Description text',
-    ))->save();
+    ])->save();
   }
 
   /**
@@ -56,47 +56,47 @@ function createLinkHierarchy($module = 'menu_test') {
     //      - child-1-1
     //      - child-1-2
     //   - child-2
-    $base_options = array(
+    $base_options = [
       'title' => 'Menu link test',
       'provider' => $module,
       'menu_name' => 'menu_test',
-    );
+    ];
 
-    $parent = $base_options + array(
+    $parent = $base_options + [
       'link' => ['uri' => 'internal:/menu-test/hierarchy/parent'],
-    );
+    ];
     $link = MenuLinkContent::create($parent);
     $link->save();
     $links['parent'] = $link->getPluginId();
 
-    $child_1 = $base_options + array(
+    $child_1 = $base_options + [
       'link' => ['uri' => 'internal:/menu-test/hierarchy/parent/child'],
       'parent' => $links['parent'],
-    );
+    ];
     $link = MenuLinkContent::create($child_1);
     $link->save();
     $links['child-1'] = $link->getPluginId();
 
-    $child_1_1 = $base_options + array(
+    $child_1_1 = $base_options + [
       'link' => ['uri' => 'internal:/menu-test/hierarchy/parent/child2/child'],
       'parent' => $links['child-1'],
-    );
+    ];
     $link = MenuLinkContent::create($child_1_1);
     $link->save();
     $links['child-1-1'] = $link->getPluginId();
 
-    $child_1_2 = $base_options + array(
+    $child_1_2 = $base_options + [
       'link' => ['uri' => 'internal:/menu-test/hierarchy/parent/child2/child'],
       'parent' => $links['child-1'],
-    );
+    ];
     $link = MenuLinkContent::create($child_1_2);
     $link->save();
     $links['child-1-2'] = $link->getPluginId();
 
-    $child_2 = $base_options + array(
+    $child_2 = $base_options + [
       'link' => ['uri' => 'internal:/menu-test/hierarchy/parent/child'],
       'parent' => $links['parent'],
-    );
+    ];
     $link = MenuLinkContent::create($child_2);
     $link->save();
     $links['child-2'] = $link->getPluginId();
@@ -113,7 +113,7 @@ function assertMenuLinkParents($links, $expected_hierarchy) {
       $menu_link_plugin = $this->menuLinkManager->createInstance($links[$id]);
       $expected_parent = isset($links[$parent]) ? $links[$parent] : '';
 
-      $this->assertEqual($menu_link_plugin->getParent(), $expected_parent, SafeMarkup::format('Menu link %id has parent of %parent, expected %expected_parent.', array('%id' => $id, '%parent' => $menu_link_plugin->getParent(), '%expected_parent' => $expected_parent)));
+      $this->assertEqual($menu_link_plugin->getParent(), $expected_parent, SafeMarkup::format('Menu link %id has parent of %parent, expected %expected_parent.', ['%id' => $id, '%parent' => $menu_link_plugin->getParent(), '%expected_parent' => $expected_parent]));
     }
   }
 
@@ -121,18 +121,18 @@ function assertMenuLinkParents($links, $expected_hierarchy) {
    * Assert that a link entity's created timestamp is set.
    */
   public function testCreateLink() {
-    $options = array(
+    $options = [
       'menu_name' => 'menu_test',
       'bundle' => 'menu_link_content',
       'link' => [['uri' => 'internal:/']],
-    );
+    ];
     $link = MenuLinkContent::create($options);
     $link->save();
     // Make sure the changed timestamp is set.
     $this->assertEqual($link->getChangedTime(), REQUEST_TIME, 'Creating a menu link sets the "changed" timestamp.');
-    $options = array(
+    $options = [
       'title' => 'Test Link',
-    );
+    ];
     $link->link->options = $options;
     $link->changed->value = 0;
     $link->save();
@@ -147,32 +147,32 @@ function testMenuLinkReparenting($module = 'menu_test') {
     // Check the initial hierarchy.
     $links = $this->createLinkHierarchy($module);
 
-    $expected_hierarchy = array(
+    $expected_hierarchy = [
       'parent' => '',
       'child-1' => 'parent',
       'child-1-1' => 'child-1',
       'child-1-2' => 'child-1',
       'child-2' => 'parent',
-    );
+    ];
     $this->assertMenuLinkParents($links, $expected_hierarchy);
 
     // Start over, and move child-1 under child-2, and check that all the
     // children of child-1 have been moved too.
     $links = $this->createLinkHierarchy($module);
     /* @var \Drupal\Core\Menu\MenuLinkInterface $menu_link_plugin  */
-    $this->menuLinkManager->updateDefinition($links['child-1'], array('parent' => $links['child-2']));
+    $this->menuLinkManager->updateDefinition($links['child-1'], ['parent' => $links['child-2']]);
     // Verify that the entity was updated too.
     $menu_link_plugin = $this->menuLinkManager->createInstance($links['child-1']);
     $entity = \Drupal::entityManager()->loadEntityByUuid('menu_link_content', $menu_link_plugin->getDerivativeId());
     $this->assertEqual($entity->getParentId(), $links['child-2']);
 
-    $expected_hierarchy = array(
+    $expected_hierarchy = [
       'parent' => '',
       'child-1' => 'child-2',
       'child-1-1' => 'child-1',
       'child-1-2' => 'child-1',
       'child-2' => 'parent',
-    );
+    ];
     $this->assertMenuLinkParents($links, $expected_hierarchy);
 
     // Start over, and delete child-1, and check that the children of child-1
@@ -180,12 +180,12 @@ function testMenuLinkReparenting($module = 'menu_test') {
     $links = $this->createLinkHierarchy($module);
     $this->menuLinkManager->removeDefinition($links['child-1']);
 
-    $expected_hierarchy = array(
+    $expected_hierarchy = [
       'parent' => FALSE,
       'child-1-1' => 'parent',
       'child-1-2' => 'parent',
       'child-2' => 'parent',
-    );
+    ];
     $this->assertMenuLinkParents($links, $expected_hierarchy);
 
     // Try changing the parent at the entity level.
@@ -194,12 +194,12 @@ function testMenuLinkReparenting($module = 'menu_test') {
     $entity->parent->value = '';
     $entity->save();
 
-    $expected_hierarchy = array(
+    $expected_hierarchy = [
       'parent' => '',
       'child-1-1' => 'parent',
       'child-1-2' => '',
       'child-2' => 'parent',
-    );
+    ];
     $this->assertMenuLinkParents($links, $expected_hierarchy);
 
     // @todo Figure out what makes sense to test in terms of automatic
@@ -210,7 +210,7 @@ function testMenuLinkReparenting($module = 'menu_test') {
    * Tests uninstalling a module providing default links.
    */
   public function testModuleUninstalledMenuLinks() {
-    \Drupal::service('module_installer')->install(array('menu_test'));
+    \Drupal::service('module_installer')->install(['menu_test']);
     \Drupal::service('router.builder')->rebuild();
     \Drupal::service('plugin.manager.menu.link')->rebuild();
     $menu_links = $this->menuLinkManager->loadLinksByRoute('menu_test.menu_test');
@@ -219,7 +219,7 @@ public function testModuleUninstalledMenuLinks() {
     $this->assertEqual($menu_link->getPluginId(), 'menu_test');
 
     // Uninstall the module and ensure the menu link got removed.
-    \Drupal::service('module_installer')->uninstall(array('menu_test'));
+    \Drupal::service('module_installer')->uninstall(['menu_test']);
     \Drupal::service('plugin.manager.menu.link')->rebuild();
     $menu_links = $this->menuLinkManager->loadLinksByRoute('menu_test.menu_test');
     $this->assertEqual(count($menu_links), 0);
diff --git a/core/modules/menu_link_content/tests/src/Kernel/Migrate/d6/MigrateMenuLinkTest.php b/core/modules/menu_link_content/tests/src/Kernel/Migrate/d6/MigrateMenuLinkTest.php
index eea87dbabee216eff045c9d371a10236c4504d39..f1368ed43bfcb8da4f4a2f6ef77faed681f70b76 100644
--- a/core/modules/menu_link_content/tests/src/Kernel/Migrate/d6/MigrateMenuLinkTest.php
+++ b/core/modules/menu_link_content/tests/src/Kernel/Migrate/d6/MigrateMenuLinkTest.php
@@ -15,7 +15,7 @@ class MigrateMenuLinkTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('menu_ui', 'menu_link_content');
+  public static $modules = ['menu_ui', 'menu_link_content'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/menu_link_content/tests/src/Kernel/Migrate/d7/MigrateMenuLinkTest.php b/core/modules/menu_link_content/tests/src/Kernel/Migrate/d7/MigrateMenuLinkTest.php
index 1d757a51346f06b5ecea053dfe11a4a46a930f4f..dc17ce3b3968807bb215f75ad901004fef349f70 100644
--- a/core/modules/menu_link_content/tests/src/Kernel/Migrate/d7/MigrateMenuLinkTest.php
+++ b/core/modules/menu_link_content/tests/src/Kernel/Migrate/d7/MigrateMenuLinkTest.php
@@ -19,7 +19,7 @@ class MigrateMenuLinkTest extends MigrateDrupal7TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('link', 'menu_ui', 'menu_link_content', 'node');
+  public static $modules = ['link', 'menu_ui', 'menu_link_content', 'node'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/MenuLinkTest.php b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/MenuLinkTest.php
index db6c5472c27e487860735f57ea335ab95d0b4ac2..7fb3a918f836e1485c193a4f6076b0c7c9ef0d3e 100644
--- a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/MenuLinkTest.php
+++ b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/MenuLinkTest.php
@@ -35,7 +35,7 @@ public function providerSource() {
         'link_path' => 'admin/config/system/cron',
         'router_path' => 'admin/config/system/cron',
         'link_title' => 'Cron',
-        'options' => array(),
+        'options' => [],
         'module' => 'system',
         'hidden' => 0,
         'external' => 0,
@@ -64,7 +64,7 @@ public function providerSource() {
         'link_path' => 'node/141',
         'router_path' => 'node/%',
         'link_title' => 'Node 141',
-        'options' => array(),
+        'options' => [],
         'module' => 'menu',
         'hidden' => 0,
         'external' => 0,
@@ -93,7 +93,7 @@ public function providerSource() {
         'link_path' => 'node/142',
         'router_path' => 'node/%',
         'link_title' => 'Node 142',
-        'options' => array(),
+        'options' => [],
         'module' => 'menu',
         'hidden' => 0,
         'external' => 0,
@@ -121,7 +121,7 @@ public function providerSource() {
         'link_path' => 'admin',
         'router_path' => 'admin',
         'link_title' => 'Test 1',
-        'options' => array('attributes' => array('title' => 'Test menu link 1')),
+        'options' => ['attributes' => ['title' => 'Test menu link 1']],
         'module' => 'menu',
         'hidden' => 0,
         'external' => 0,
@@ -149,7 +149,7 @@ public function providerSource() {
         'link_path' => 'admin/modules',
         'router_path' => 'admin/modules',
         'link_title' => 'Test 2',
-        'options' => array('attributes' => array('title' => 'Test menu link 2')),
+        'options' => ['attributes' => ['title' => 'Test menu link 2']],
         'module' => 'menu',
         'hidden' => 0,
         'external' => 0,
@@ -177,7 +177,7 @@ public function providerSource() {
         'link_path' => 'admin/build/menu-customize/navigation',
         'router_path' => 'admin/build/menu-customize/%',
         'link_title' => 'Navigation',
-        'options' => array(),
+        'options' => [],
         'module' => 'menu',
         'hidden' => 0,
         'external' => 0,
diff --git a/core/modules/menu_ui/menu_ui.module b/core/modules/menu_ui/menu_ui.module
index bb3ec23dfb4a021593bce6ec2b9cc4907c9e7fa6..cffccde76801fc70a96a3ce16f4d546cec0a80ff 100644
--- a/core/modules/menu_ui/menu_ui.module
+++ b/core/modules/menu_ui/menu_ui.module
@@ -38,21 +38,21 @@ function menu_ui_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.menu_ui':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Menu UI module provides an interface for managing menus. A menu is a hierarchical collection of links, which can be within or external to the site, generally used for navigation. For more information, see the <a href=":menu">online documentation for the Menu UI module</a>.', array(':menu' => 'https://www.drupal.org/documentation/modules/menu/')) . '</p>';
+      $output .= '<p>' . t('The Menu UI module provides an interface for managing menus. A menu is a hierarchical collection of links, which can be within or external to the site, generally used for navigation. For more information, see the <a href=":menu">online documentation for the Menu UI module</a>.', [':menu' => 'https://www.drupal.org/documentation/modules/menu/']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing menus') . '</dt>';
-      $output .= '<dd>' . t('Users with the <em>Administer menus and menu items</em> permission can add, edit, and delete custom menus on the <a href=":menu">Menus page</a>. Custom menus can be special site menus, menus of external links, or any combination of internal and external links. You may create an unlimited number of additional menus, each of which will automatically have an associated block (if you have the <a href=":block_help">Block module</a> installed). By selecting <em>Edit menu</em>, you can add, edit, or delete links for a given menu. The links listing page provides a drag-and-drop interface for controlling the order of links, and creating a hierarchy within the menu.', array(':block_help' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('help.page', array('name' => 'block')) : '#', ':menu' => \Drupal::url('entity.menu.collection'))) . '</dd>';
+      $output .= '<dd>' . t('Users with the <em>Administer menus and menu items</em> permission can add, edit, and delete custom menus on the <a href=":menu">Menus page</a>. Custom menus can be special site menus, menus of external links, or any combination of internal and external links. You may create an unlimited number of additional menus, each of which will automatically have an associated block (if you have the <a href=":block_help">Block module</a> installed). By selecting <em>Edit menu</em>, you can add, edit, or delete links for a given menu. The links listing page provides a drag-and-drop interface for controlling the order of links, and creating a hierarchy within the menu.', [':block_help' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('help.page', ['name' => 'block']) : '#', ':menu' => \Drupal::url('entity.menu.collection')]) . '</dd>';
       $output .= '<dt>' . t('Displaying menus') . '</dt>';
-      $output .= '<dd>' . t('If you have the Block module enabled, then each menu that you create is rendered in a block that you enable and position on the <a href=":blocks">Block layout page</a>. In some <a href=":themes">themes</a>, the main menu and possibly the secondary menu will be output automatically; you may be able to disable this behavior on the <a href=":themes">theme\'s settings page</a>.', array(':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#', ':themes' => \Drupal::url('system.themes_page'), ':theme_settings' => \Drupal::url('system.theme_settings'))) . '</dd>';
+      $output .= '<dd>' . t('If you have the Block module enabled, then each menu that you create is rendered in a block that you enable and position on the <a href=":blocks">Block layout page</a>. In some <a href=":themes">themes</a>, the main menu and possibly the secondary menu will be output automatically; you may be able to disable this behavior on the <a href=":themes">theme\'s settings page</a>.', [':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#', ':themes' => \Drupal::url('system.themes_page'), ':theme_settings' => \Drupal::url('system.theme_settings')]) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
   if ($route_name == 'entity.menu.add_form' && \Drupal::moduleHandler()->moduleExists('block') && \Drupal::currentUser()->hasPermission('administer blocks')) {
-    return '<p>' . t('You can enable the newly-created block for this menu on the <a href=":blocks">Block layout page</a>.', array(':blocks' => \Drupal::url('block.admin_display'))) . '</p>';
+    return '<p>' . t('You can enable the newly-created block for this menu on the <a href=":blocks">Block layout page</a>.', [':blocks' => \Drupal::url('block.admin_display')]) . '</p>';
   }
   elseif ($route_name == 'entity.menu.collection' && \Drupal::moduleHandler()->moduleExists('block') && \Drupal::currentUser()->hasPermission('administer blocks')) {
-    return '<p>' . t('Each menu has a corresponding block that is managed on the <a href=":blocks">Block layout page</a>.', array(':blocks' => \Drupal::url('block.admin_display'))) . '</p>';
+    return '<p>' . t('Each menu has a corresponding block that is managed on the <a href=":blocks">Block layout page</a>.', [':blocks' => \Drupal::url('block.admin_display')]) . '</p>';
   }
 }
 
@@ -123,9 +123,9 @@ function menu_ui_menu_delete(Menu $menu) {
 function menu_ui_block_view_system_menu_block_alter(array &$build, BlockPluginInterface $block) {
   if ($block->getBaseId() == 'system_menu_block') {
     $menu_name = $block->getDerivativeId();
-    $build['#contextual_links']['menu'] = array(
-      'route_parameters' => array('menu' => $menu_name),
-    );
+    $build['#contextual_links']['menu'] = [
+      'route_parameters' => ['menu' => $menu_name],
+    ];
   }
 }
 
@@ -152,10 +152,10 @@ function _menu_ui_node_save(NodeInterface $node, array $values) {
   }
   else {
     // Create a new menu_link_content entity.
-    $entity = MenuLinkContent::create(array(
+    $entity = MenuLinkContent::create([
       'link' => ['uri' => 'entity:node/' . $node->id()],
       'langcode' => $node->language()->getId(),
-    ));
+    ]);
     $entity->enabled->value = 1;
   }
   $entity->title->value = trim($values['title']);
@@ -173,7 +173,7 @@ function menu_ui_node_predelete(EntityInterface $node) {
   // Delete all MenuLinkContent links that point to this node.
   /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
   $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
-  $result = $menu_link_manager->loadLinksByRoute('entity.node.canonical', array('node' => $node->id()));
+  $result = $menu_link_manager->loadLinksByRoute('entity.node.canonical', ['node' => $node->id()]);
 
   if (!empty($result)) {
     foreach ($result as $id => $instance) {
@@ -202,7 +202,7 @@ function menu_ui_get_menu_link_defaults(NodeInterface $node) {
   if ($node->id()) {
     $id = FALSE;
     // Give priority to the default menu
-    $type_menus = $node_type->getThirdPartySetting('menu_ui', 'available_menus', array('main'));
+    $type_menus = $node_type->getThirdPartySetting('menu_ui', 'available_menus', ['main']);
     if (in_array($menu_name, $type_menus)) {
       $query = \Drupal::entityQuery('menu_link_content')
         ->condition('link.uri', 'node/' . $node->id())
@@ -227,7 +227,7 @@ function menu_ui_get_menu_link_defaults(NodeInterface $node) {
     if ($id) {
       $menu_link = MenuLinkContent::load($id);
       $menu_link = \Drupal::service('entity.repository')->getTranslationFromContext($menu_link);
-      $defaults = array(
+      $defaults = [
         'entity_id' => $menu_link->id(),
         'id' => $menu_link->getPluginId(),
         'title' => $menu_link->getTitle(),
@@ -236,7 +236,7 @@ function menu_ui_get_menu_link_defaults(NodeInterface $node) {
         'menu_name' => $menu_link->getMenuName(),
         'parent' => $menu_link->getParentId(),
         'weight' => $menu_link->getWeight(),
-      );
+      ];
     }
   }
 
@@ -245,7 +245,7 @@ function menu_ui_get_menu_link_defaults(NodeInterface $node) {
     // definition.
     $field_definitions = \Drupal::entityManager()->getBaseFieldDefinitions('menu_link_content');
     $max_length = $field_definitions['title']->getSetting('max_length');
-    $defaults = array(
+    $defaults = [
       'entity_id' => 0,
       'id' => '',
       'title' => '',
@@ -254,7 +254,7 @@ function menu_ui_get_menu_link_defaults(NodeInterface $node) {
       'menu_name' => $menu_name,
       'parent' => '',
       'weight' => 0,
-    );
+    ];
   }
   return $defaults;
 }
@@ -276,8 +276,8 @@ function menu_ui_form_node_form_alter(&$form, FormStateInterface $form_state) {
   /** @var \Drupal\Core\Menu\MenuParentFormSelectorInterface $menu_parent_selector */
   $menu_parent_selector = \Drupal::service('menu.parent_form_selector');
   $menu_names = menu_ui_get_menus();
-  $type_menus = $node_type->getThirdPartySetting('menu_ui', 'available_menus', array('main'));
-  $available_menus = array();
+  $type_menus = $node_type->getThirdPartySetting('menu_ui', 'available_menus', ['main']);
+  $available_menus = [];
   foreach ($type_menus as $menu) {
     $available_menus[$menu] = $menu_names[$menu];
   }
@@ -293,64 +293,64 @@ function menu_ui_form_node_form_alter(&$form, FormStateInterface $form_state) {
     return;
   }
 
-  $form['menu'] = array(
+  $form['menu'] = [
     '#type' => 'details',
     '#title' => t('Menu settings'),
     '#access' => \Drupal::currentUser()->hasPermission('administer menu'),
     '#open' => (bool) $defaults['id'],
     '#group' => 'advanced',
-    '#attached' => array(
-      'library' => array('menu_ui/drupal.menu_ui'),
-    ),
+    '#attached' => [
+      'library' => ['menu_ui/drupal.menu_ui'],
+    ],
     '#tree' => TRUE,
     '#weight' => -2,
-    '#attributes' => array('class' => array('menu-link-form')),
-  );
-  $form['menu']['enabled'] = array(
+    '#attributes' => ['class' => ['menu-link-form']],
+  ];
+  $form['menu']['enabled'] = [
     '#type' => 'checkbox',
     '#title' => t('Provide a menu link'),
     '#default_value' => (int) (bool) $defaults['id'],
-  );
-  $form['menu']['link'] = array(
+  ];
+  $form['menu']['link'] = [
     '#type' => 'container',
-    '#parents' => array('menu'),
-    '#states' => array(
-      'invisible' => array(
-        'input[name="menu[enabled]"]' => array('checked' => FALSE),
-      ),
-    ),
-  );
+    '#parents' => ['menu'],
+    '#states' => [
+      'invisible' => [
+        'input[name="menu[enabled]"]' => ['checked' => FALSE],
+      ],
+    ],
+  ];
 
   // Populate the element with the link data.
-  foreach (array('id', 'entity_id') as $key) {
-    $form['menu']['link'][$key] = array('#type' => 'value', '#value' => $defaults[$key]);
+  foreach (['id', 'entity_id'] as $key) {
+    $form['menu']['link'][$key] = ['#type' => 'value', '#value' => $defaults[$key]];
   }
 
-  $form['menu']['link']['title'] = array(
+  $form['menu']['link']['title'] = [
     '#type' => 'textfield',
     '#title' => t('Menu link title'),
     '#default_value' => $defaults['title'],
     '#maxlength' => $defaults['title_max_length'],
-  );
+  ];
 
-  $form['menu']['link']['description'] = array(
+  $form['menu']['link']['description'] = [
     '#type' => 'textarea',
     '#title' => t('Description'),
     '#default_value' => $defaults['description'],
     '#rows' => 1,
     '#description' => t('Shown when hovering over the menu link.'),
-  );
+  ];
 
   $form['menu']['link']['menu_parent'] = $parent_element;
   $form['menu']['link']['menu_parent']['#title'] = t('Parent item');
   $form['menu']['link']['menu_parent']['#attributes']['class'][] = 'menu-parent-select';
 
-  $form['menu']['link']['weight'] = array(
+  $form['menu']['link']['weight'] = [
     '#type' => 'number',
     '#title' => t('Weight'),
     '#default_value' => $defaults['weight'],
     '#description' => t('Menu links with lower weights are displayed before links with higher weights.'),
-  );
+  ];
 
   foreach (array_keys($form['actions']) as $action) {
     if ($action != 'preview' && isset($form['actions'][$action]['#type']) && $form['actions'][$action]['#type'] === 'submit') {
@@ -401,21 +401,21 @@ function menu_ui_form_node_type_form_alter(&$form, FormStateInterface $form_stat
   $menu_options = menu_ui_get_menus();
   /** @var \Drupal\node\NodeTypeInterface $type */
   $type = $form_state->getFormObject()->getEntity();
-  $form['menu'] = array(
+  $form['menu'] = [
     '#type' => 'details',
     '#title' => t('Menu settings'),
-    '#attached' => array(
-      'library' => array('menu_ui/drupal.menu_ui.admin'),
-    ),
+    '#attached' => [
+      'library' => ['menu_ui/drupal.menu_ui.admin'],
+    ],
     '#group' => 'additional_settings',
-  );
-  $form['menu']['menu_options'] = array(
+  ];
+  $form['menu']['menu_options'] = [
     '#type' => 'checkboxes',
     '#title' => t('Available menus'),
-    '#default_value' => $type->getThirdPartySetting('menu_ui', 'available_menus', array('main')),
+    '#default_value' => $type->getThirdPartySetting('menu_ui', 'available_menus', ['main']),
     '#options' => $menu_options,
     '#description' => t('The menus available to place links in for this content type.'),
-  );
+  ];
   // @todo See if we can avoid pre-loading all options by changing the form or
   //   using a #process callback. https://www.drupal.org/node/2310319
   //   To avoid an 'illegal option' error after saving the form we have to load
@@ -423,14 +423,14 @@ function menu_ui_form_node_type_form_alter(&$form, FormStateInterface $form_stat
   //   add options to the list using ajax.
   $options_cacheability = new CacheableMetadata();
   $options = $menu_parent_selector->getParentSelectOptions('', NULL, $options_cacheability);
-  $form['menu']['menu_parent'] = array(
+  $form['menu']['menu_parent'] = [
     '#type' => 'select',
     '#title' => t('Default parent item'),
     '#default_value' => $type->getThirdPartySetting('menu_ui', 'parent', 'main:'),
     '#options' => $options,
     '#description' => t('Choose the menu item to be the default parent for a new link in the content authoring form.'),
-    '#attributes' => array('class' => array('menu-title-select')),
-  );
+    '#attributes' => ['class' => ['menu-title-select']],
+  ];
   $options_cacheability->applyTo($form['menu']['menu_parent']);
 
   $form['#validate'][] = 'menu_ui_form_node_type_form_validate';
diff --git a/core/modules/menu_ui/src/Controller/MenuController.php b/core/modules/menu_ui/src/Controller/MenuController.php
index 39b0a32a9e9c8b451d8a4ccd34899b312095f89e..7958c101ace4cdb212876becccc8a3b327b0fb71 100644
--- a/core/modules/menu_ui/src/Controller/MenuController.php
+++ b/core/modules/menu_ui/src/Controller/MenuController.php
@@ -49,7 +49,7 @@ public static function create(ContainerInterface $container) {
    *   The available menu and menu items.
    */
   public function getParentOptions(Request $request) {
-    $available_menus = array();
+    $available_menus = [];
     if ($menus = $request->request->get('menus')) {
       foreach ($menus as $menu) {
         $available_menus[$menu] = $menu;
diff --git a/core/modules/menu_ui/src/Form/MenuDeleteForm.php b/core/modules/menu_ui/src/Form/MenuDeleteForm.php
index 22bfb0ac3b0e4724ba1eef2907d921218c59c7e4..1cebd9091c2f41af3bb4ce834e0780b0778d6ae3 100644
--- a/core/modules/menu_ui/src/Form/MenuDeleteForm.php
+++ b/core/modules/menu_ui/src/Form/MenuDeleteForm.php
@@ -57,7 +57,7 @@ public function getDescription() {
     $caption = '';
     $num_links = $this->menuLinkManager->countMenuLinks($this->entity->id());
     if ($num_links) {
-      $caption .= '<p>' . $this->formatPlural($num_links, '<strong>Warning:</strong> There is currently 1 menu link in %title. It will be deleted (system-defined items will be reset).', '<strong>Warning:</strong> There are currently @count menu links in %title. They will be deleted (system-defined links will be reset).', array('%title' => $this->entity->label())) . '</p>';
+      $caption .= '<p>' . $this->formatPlural($num_links, '<strong>Warning:</strong> There is currently 1 menu link in %title. It will be deleted (system-defined items will be reset).', '<strong>Warning:</strong> There are currently @count menu links in %title. They will be deleted (system-defined links will be reset).', ['%title' => $this->entity->label()]) . '</p>';
     }
     $caption .= '<p>' . t('This action cannot be undone.') . '</p>';
     return $caption;
@@ -67,7 +67,7 @@ public function getDescription() {
    * {@inheritdoc}
    */
   protected function logDeletionMessage() {
-    $this->logger('menu')->notice('Deleted custom menu %title and all its menu links.', array('%title' => $this->entity->label()));
+    $this->logger('menu')->notice('Deleted custom menu %title and all its menu links.', ['%title' => $this->entity->label()]);
   }
 
   /**
@@ -85,7 +85,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     //   parameter that is being removed. Also, consider moving this to
     //   menu_ui.module as part of a generic response to entity deletion.
     //   https://www.drupal.org/node/2310329
-    $menu_links = $this->menuLinkManager->loadLinksByRoute('entity.menu.edit_form', array('menu' => $this->entity->id()), TRUE);
+    $menu_links = $this->menuLinkManager->loadLinksByRoute('entity.menu.edit_form', ['menu' => $this->entity->id()], TRUE);
     foreach ($menu_links as $id => $link) {
       $this->menuLinkManager->removeDefinition($id);
     }
diff --git a/core/modules/menu_ui/src/Form/MenuLinkEditForm.php b/core/modules/menu_ui/src/Form/MenuLinkEditForm.php
index cf133cd53d62c4d6492a915e577a9d81eb61226d..2dbd6a5e8adb5ec94ad0d81075e8f3793bd26b70 100644
--- a/core/modules/menu_ui/src/Form/MenuLinkEditForm.php
+++ b/core/modules/menu_ui/src/Form/MenuLinkEditForm.php
@@ -57,22 +57,22 @@ public function getFormId() {
    *   The plugin instance to use for this form.
    */
   public function buildForm(array $form, FormStateInterface $form_state, MenuLinkInterface $menu_link_plugin = NULL) {
-    $form['menu_link_id'] = array(
+    $form['menu_link_id'] = [
       '#type' => 'value',
       '#value' => $menu_link_plugin->getPluginId(),
-    );
+    ];
     $class_name = $menu_link_plugin->getFormClass();
     $form['#plugin_form'] = $this->classResolver->getInstanceFromDefinition($class_name);
     $form['#plugin_form']->setMenuLinkInstance($menu_link_plugin);
 
     $form += $form['#plugin_form']->buildConfigurationForm($form, $form_state);
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
       '#button_type' => 'primary',
-    );
+    ];
     return $form;
   }
 
@@ -92,7 +92,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     drupal_set_message($this->t('The menu link has been saved.'));
     $form_state->setRedirect(
       'entity.menu.edit_form',
-      array('menu' => $link->getMenuName())
+      ['menu' => $link->getMenuName()]
     );
   }
 
diff --git a/core/modules/menu_ui/src/Form/MenuLinkResetForm.php b/core/modules/menu_ui/src/Form/MenuLinkResetForm.php
index 6fbf6228d3ced3009ee0081fe14f34bc3dcb7a54..e37b16b0721703d9c5d2405d6c4c19e239dd5491 100644
--- a/core/modules/menu_ui/src/Form/MenuLinkResetForm.php
+++ b/core/modules/menu_ui/src/Form/MenuLinkResetForm.php
@@ -59,16 +59,16 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to reset the link %item to its default values?', array('%item' => $this->link->getTitle()));
+    return $this->t('Are you sure you want to reset the link %item to its default values?', ['%item' => $this->link->getTitle()]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function getCancelUrl() {
-    return new Url('entity.menu.edit_form', array(
+    return new Url('entity.menu.edit_form', [
       'menu' => $this->link->getMenuName(),
-    ));
+    ]);
   }
 
   /**
diff --git a/core/modules/menu_ui/src/MenuForm.php b/core/modules/menu_ui/src/MenuForm.php
index 105875f727aa214185662a570e1d42c1475ce78d..0bee996755e13671ac3134e8dce2fbcec27941e4 100644
--- a/core/modules/menu_ui/src/MenuForm.php
+++ b/core/modules/menu_ui/src/MenuForm.php
@@ -48,7 +48,7 @@ class MenuForm extends EntityForm {
    *
    * @var array
    */
-  protected $overviewTreeForm = array('#tree' => TRUE);
+  protected $overviewTreeForm = ['#tree' => TRUE];
 
   /**
    * Constructs a MenuForm object.
@@ -84,43 +84,43 @@ public function form(array $form, FormStateInterface $form_state) {
     $menu = $this->entity;
 
     if ($this->operation == 'edit') {
-      $form['#title'] = $this->t('Edit menu %label', array('%label' => $menu->label()));
+      $form['#title'] = $this->t('Edit menu %label', ['%label' => $menu->label()]);
     }
 
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Title'),
       '#default_value' => $menu->label(),
       '#required' => TRUE,
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
       '#title' => $this->t('Menu name'),
       '#default_value' => $menu->id(),
       '#maxlength' => MENU_MAX_MENU_NAME_LENGTH_UI,
       '#description' => $this->t('A unique name to construct the URL for the menu. It must only contain lowercase letters, numbers and hyphens.'),
-      '#machine_name' => array(
-        'exists' => array($this, 'menuNameExists'),
-        'source' => array('label'),
+      '#machine_name' => [
+        'exists' => [$this, 'menuNameExists'],
+        'source' => ['label'],
         'replace_pattern' => '[^a-z0-9-]+',
         'replace' => '-',
-      ),
+      ],
       // A menu's machine name cannot be changed.
       '#disabled' => !$menu->isNew() || $menu->isLocked(),
-    );
-    $form['description'] = array(
+    ];
+    $form['description'] = [
       '#type' => 'textfield',
       '#title' => t('Administrative summary'),
       '#maxlength' => 512,
       '#default_value' => $menu->getDescription(),
-    );
+    ];
 
-    $form['langcode'] = array(
+    $form['langcode'] = [
       '#type' => 'language_select',
       '#title' => t('Menu language'),
       '#languages' => LanguageInterface::STATE_ALL,
       '#default_value' => $menu->language()->getId(),
-    );
+    ];
 
     // Add menu links administration form for existing menus.
     if (!$menu->isNew() || $menu->isLocked()) {
@@ -130,7 +130,7 @@ public function form(array $form, FormStateInterface $form_state) {
       // the parents of the form section.
       // @see self::submitOverviewForm()
       $form_state->set('menu_overview_form_parents', ['links']);
-      $form['links'] = array();
+      $form['links'] = [];
       $form['links'] = $this->buildOverviewForm($form['links'], $form_state);
     }
 
@@ -164,12 +164,12 @@ public function save(array $form, FormStateInterface $form_state) {
     $status = $menu->save();
     $edit_link = $this->entity->link($this->t('Edit'));
     if ($status == SAVED_UPDATED) {
-      drupal_set_message($this->t('Menu %label has been updated.', array('%label' => $menu->label())));
-      $this->logger('menu')->notice('Menu %label has been updated.', array('%label' => $menu->label(), 'link' => $edit_link));
+      drupal_set_message($this->t('Menu %label has been updated.', ['%label' => $menu->label()]));
+      $this->logger('menu')->notice('Menu %label has been updated.', ['%label' => $menu->label(), 'link' => $edit_link]);
     }
     else {
-      drupal_set_message($this->t('Menu %label has been added.', array('%label' => $menu->label())));
-      $this->logger('menu')->notice('Menu %label has been added.', array('%label' => $menu->label(), 'link' => $edit_link));
+      drupal_set_message($this->t('Menu %label has been added.', ['%label' => $menu->label()]));
+      $this->logger('menu')->notice('Menu %label has been added.', ['%label' => $menu->label(), 'link' => $edit_link]);
     }
 
     $form_state->setRedirectUrl($this->entity->urlInfo('edit-form'));
@@ -213,10 +213,10 @@ protected function buildOverviewForm(array &$form, FormStateInterface $form_stat
 
     // We indicate that a menu administrator is running the menu access check.
     $this->getRequest()->attributes->set('_menu_admin', TRUE);
-    $manipulators = array(
-      array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-      array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
-    );
+    $manipulators = [
+      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+      ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+    ];
     $tree = $this->menuTree->transform($tree, $manipulators);
     $this->getRequest()->attributes->set('_menu_admin', FALSE);
 
@@ -229,26 +229,26 @@ protected function buildOverviewForm(array &$form, FormStateInterface $form_stat
     };
     $delta = max($count($tree), 50);
 
-    $form['links'] = array(
+    $form['links'] = [
       '#type' => 'table',
       '#theme' => 'table__menu_overview',
-      '#header' => array(
+      '#header' => [
         $this->t('Menu link'),
-        array(
+        [
           'data' => $this->t('Enabled'),
-          'class' => array('checkbox'),
-        ),
+          'class' => ['checkbox'],
+        ],
         $this->t('Weight'),
-        array(
+        [
           'data' => $this->t('Operations'),
           'colspan' => 3,
-        ),
-      ),
-      '#attributes' => array(
+        ],
+      ],
+      '#attributes' => [
         'id' => 'menu-overview',
-      ),
-      '#tabledrag' => array(
-        array(
+      ],
+      '#tabledrag' => [
+        [
           'action' => 'match',
           'relationship' => 'parent',
           'group' => 'menu-parent',
@@ -256,14 +256,14 @@ protected function buildOverviewForm(array &$form, FormStateInterface $form_stat
           'source' => 'menu-id',
           'hidden' => TRUE,
           'limit' => \Drupal::menuTree()->maxDepth() - 1,
-        ),
-        array(
+        ],
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'menu-weight',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     $form['links']['#empty'] = $this->t('There are no menu links yet. <a href=":url">Add link</a>.', [
       ':url' => $this->url('entity.menu.add_link_form', ['menu' => $this->entity->id()], [
@@ -285,19 +285,19 @@ protected function buildOverviewForm(array &$form, FormStateInterface $form_stat
         $form['links'][$id]['#weight'] = $element['#item']->link->getWeight();
 
         // Add special classes to be used for tabledrag.js.
-        $element['parent']['#attributes']['class'] = array('menu-parent');
-        $element['weight']['#attributes']['class'] = array('menu-weight');
-        $element['id']['#attributes']['class'] = array('menu-id');
+        $element['parent']['#attributes']['class'] = ['menu-parent'];
+        $element['weight']['#attributes']['class'] = ['menu-weight'];
+        $element['id']['#attributes']['class'] = ['menu-id'];
 
-        $form['links'][$id]['title'] = array(
-          array(
+        $form['links'][$id]['title'] = [
+          [
             '#theme' => 'indentation',
             '#size' => $element['#item']->depth - 1,
-          ),
+          ],
           $element['title'],
-        );
+        ];
         $form['links'][$id]['enabled'] = $element['enabled'];
-        $form['links'][$id]['enabled']['#wrapper_attributes']['class'] = array('checkbox', 'menu-enabled');
+        $form['links'][$id]['enabled']['#wrapper_attributes']['class'] = ['checkbox', 'menu-enabled'];
 
         $form['links'][$id]['weight'] = $element['weight'];
 
@@ -339,7 +339,7 @@ protected function buildOverviewTreeForm($tree, $delta) {
       if ($link) {
         $id = 'menu_plugin_id:' . $link->getPluginId();
         $form[$id]['#item'] = $element;
-        $form[$id]['#attributes'] = $link->isEnabled() ? array('class' => array('menu-enabled')) : array('class' => array('menu-disabled'));
+        $form[$id]['#attributes'] = $link->isEnabled() ? ['class' => ['menu-enabled']] : ['class' => ['menu-disabled']];
         $form[$id]['title'] = Link::fromTextAndUrl($link->getTitle(), $link->getUrlObject())->toRenderable();
         if (!$link->isEnabled()) {
           $form[$id]['title']['#suffix'] = ' (' . $this->t('disabled') . ')';
@@ -353,32 +353,32 @@ protected function buildOverviewTreeForm($tree, $delta) {
           $form[$id]['title']['#suffix'] = ' (' . $this->t('logged in users only') . ')';
         }
 
-        $form[$id]['enabled'] = array(
+        $form[$id]['enabled'] = [
           '#type' => 'checkbox',
-          '#title' => $this->t('Enable @title menu link', array('@title' => $link->getTitle())),
+          '#title' => $this->t('Enable @title menu link', ['@title' => $link->getTitle()]),
           '#title_display' => 'invisible',
           '#default_value' => $link->isEnabled(),
-        );
-        $form[$id]['weight'] = array(
+        ];
+        $form[$id]['weight'] = [
           '#type' => 'weight',
           '#delta' => $delta,
           '#default_value' => $link->getWeight(),
-          '#title' => $this->t('Weight for @title', array('@title' => $link->getTitle())),
+          '#title' => $this->t('Weight for @title', ['@title' => $link->getTitle()]),
           '#title_display' => 'invisible',
-        );
-        $form[$id]['id'] = array(
+        ];
+        $form[$id]['id'] = [
           '#type' => 'hidden',
           '#value' => $link->getPluginId(),
-        );
-        $form[$id]['parent'] = array(
+        ];
+        $form[$id]['parent'] = [
           '#type' => 'hidden',
           '#default_value' => $link->getParent(),
-        );
+        ];
         // Build a list of operations.
-        $operations = array();
-        $operations['edit'] = array(
+        $operations = [];
+        $operations['edit'] = [
           'title' => $this->t('Edit'),
-        );
+        ];
         // Allow for a custom edit link per plugin.
         $edit_route = $link->getEditRoute();
         if ($edit_route) {
@@ -388,16 +388,16 @@ protected function buildOverviewTreeForm($tree, $delta) {
         }
         else {
           // Fall back to the standard edit link.
-          $operations['edit'] += array(
+          $operations['edit'] += [
             'url' => Url::fromRoute('menu_ui.link_edit', ['menu_link_plugin' => $link->getPluginId()]),
-          );
+          ];
         }
         // Links can either be reset or deleted, not both.
         if ($link->isResettable()) {
-          $operations['reset'] = array(
+          $operations['reset'] = [
             'title' => $this->t('Reset'),
             'url' => Url::fromRoute('menu_ui.link_reset', ['menu_link_plugin' => $link->getPluginId()]),
-          );
+          ];
         }
         elseif ($delete_link = $link->getDeleteRoute()) {
           $operations['delete']['url'] = $delete_link;
@@ -405,15 +405,15 @@ protected function buildOverviewTreeForm($tree, $delta) {
           $operations['delete']['title'] = $this->t('Delete');
         }
         if ($link->isTranslatable()) {
-          $operations['translate'] = array(
+          $operations['translate'] = [
             'title' => $this->t('Translate'),
             'url' => $link->getTranslateRoute(),
-          );
+          ];
         }
-        $form[$id]['operations'] = array(
+        $form[$id]['operations'] = [
           '#type' => 'operations',
           '#links' => $operations,
-        );
+        ];
       }
 
       if ($element->subtree) {
@@ -449,16 +449,16 @@ protected function submitOverviewForm(array $complete_form, FormStateInterface $
     // parent. To prevent this, save items in the form in the same order they
     // are sent, ensuring parents are saved first, then their children.
     // See https://www.drupal.org/node/181126#comment-632270.
-    $order = is_array($input) ? array_flip(array_keys($input)) : array();
+    $order = is_array($input) ? array_flip(array_keys($input)) : [];
     // Update our original form with the new order.
     $form = array_intersect_key(array_merge($order, $form), $form);
 
-    $fields = array('weight', 'parent', 'enabled');
+    $fields = ['weight', 'parent', 'enabled'];
     $form_links = $form['links'];
     foreach (Element::children($form_links) as $id) {
       if (isset($form_links[$id]['#item'])) {
         $element = $form_links[$id];
-        $updated_values = array();
+        $updated_values = [];
         // Update any fields that have changed in this menu item.
         foreach ($fields as $field) {
           if ($element[$field]['#value'] != $element[$field]['#default_value']) {
diff --git a/core/modules/menu_ui/src/MenuListBuilder.php b/core/modules/menu_ui/src/MenuListBuilder.php
index 1534272771778c43b1a738f6eaf6a2f4f954c62a..b694c8b9372a06deb6ab23c3af79181fb3ac3ab3 100644
--- a/core/modules/menu_ui/src/MenuListBuilder.php
+++ b/core/modules/menu_ui/src/MenuListBuilder.php
@@ -18,10 +18,10 @@ class MenuListBuilder extends ConfigEntityListBuilder {
    */
   public function buildHeader() {
     $header['title'] = t('Title');
-    $header['description'] = array(
+    $header['description'] = [
       'data' => t('Description'),
-      'class' => array(RESPONSIVE_PRIORITY_MEDIUM),
-    );
+      'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+    ];
     return $header + parent::buildHeader();
   }
 
@@ -29,10 +29,10 @@ public function buildHeader() {
    * {@inheritdoc}
    */
   public function buildRow(EntityInterface $entity) {
-    $row['title'] = array(
+    $row['title'] = [
       'data' => $entity->label(),
-      'class' => array('menu-label'),
-    );
+      'class' => ['menu-label'],
+    ];
     $row['description']['data'] = ['#markup' => $entity->getDescription()];
     return $row + parent::buildRow($entity);
   }
@@ -45,11 +45,11 @@ public function getDefaultOperations(EntityInterface $entity) {
 
     if (isset($operations['edit'])) {
       $operations['edit']['title'] = t('Edit menu');
-      $operations['add'] = array(
+      $operations['add'] = [
         'title' => t('Add link'),
         'weight' => 20,
         'url' => $entity->urlInfo('add-link-form'),
-      );
+      ];
     }
     if (isset($operations['delete'])) {
       $operations['delete']['title'] = t('Delete menu');
diff --git a/core/modules/menu_ui/src/Tests/MenuLanguageTest.php b/core/modules/menu_ui/src/Tests/MenuLanguageTest.php
index 72865ea01049480343d5f7840ab22ba2a0b9581f..856f4088b6e697d164316dea427eaad73e15690b 100644
--- a/core/modules/menu_ui/src/Tests/MenuLanguageTest.php
+++ b/core/modules/menu_ui/src/Tests/MenuLanguageTest.php
@@ -21,19 +21,19 @@ class MenuLanguageTest extends MenuWebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalLogin($this->drupalCreateUser(array('access administration pages', 'administer menu')));
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer menu']));
 
     // Add some custom languages.
-    foreach (array('aa', 'bb', 'cc', 'cs') as $language_code) {
-      ConfigurableLanguage::create(array(
+    foreach (['aa', 'bb', 'cc', 'cs'] as $language_code) {
+      ConfigurableLanguage::create([
         'id' => $language_code,
         'label' => $this->randomMachineName(),
-      ))->save();
+      ])->save();
     }
   }
 
@@ -45,12 +45,12 @@ function testMenuLanguage() {
     // Machine name has to be lowercase.
     $menu_name = Unicode::strtolower($this->randomMachineName(16));
     $label = $this->randomString();
-    $edit = array(
+    $edit = [
       'id' => $menu_name,
       'description' => '',
       'label' => $label,
       'langcode' => 'aa',
-    );
+    ];
     $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
     ContentLanguageSettings::loadByEntityTypeBundle('menu_link_content', 'menu_link_content')
       ->setDefaultLangcode('bb')
@@ -65,19 +65,19 @@ function testMenuLanguage() {
 
     // Add a menu link.
     $link_title = $this->randomString();
-    $edit = array(
+    $edit = [
       'title[0][value]' => $link_title,
       'link[0][uri]' => $link_path,
-    );
+    ];
     $this->drupalPostForm("admin/structure/menu/manage/$menu_name/add", $edit, t('Save'));
     // Check the link was added with the correct menu link default language.
-    $menu_links = entity_load_multiple_by_properties('menu_link_content', array('title' => $link_title));
+    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $link_title]);
     $menu_link = reset($menu_links);
-    $this->assertMenuLink($menu_link->getPluginId(), array(
+    $this->assertMenuLink($menu_link->getPluginId(), [
       'menu_name' => $menu_name,
       'route_name' => '<front>',
       'langcode' => 'bb',
-    ));
+    ]);
 
     // Edit menu link default, changing it to cc.
     ContentLanguageSettings::loadByEntityTypeBundle('menu_link_content', 'menu_link_content')
@@ -87,30 +87,30 @@ function testMenuLanguage() {
 
     // Add a menu link.
     $link_title = $this->randomString();
-    $edit = array(
+    $edit = [
       'title[0][value]' => $link_title,
       'link[0][uri]' => $link_path,
-    );
+    ];
     $this->drupalPostForm("admin/structure/menu/manage/$menu_name/add", $edit, t('Save'));
     // Check the link was added with the correct new menu link default language.
-    $menu_links = entity_load_multiple_by_properties('menu_link_content', array('title' => $link_title));
+    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $link_title]);
     $menu_link = reset($menu_links);
-    $this->assertMenuLink($menu_link->getPluginId(), array(
+    $this->assertMenuLink($menu_link->getPluginId(), [
       'menu_name' => $menu_name,
       'route_name' => '<front>',
       'langcode' => 'cc',
-    ));
+    ]);
 
     // Now change the language of the new link to 'bb'.
-    $edit = array(
+    $edit = [
       'langcode[0][value]' => 'bb',
-    );
+    ];
     $this->drupalPostForm('admin/structure/menu/item/' . $menu_link->id() . '/edit', $edit, t('Save'));
-    $this->assertMenuLink($menu_link->getPluginId(), array(
+    $this->assertMenuLink($menu_link->getPluginId(), [
       'menu_name' => $menu_name,
       'route_name' => '<front>',
       'langcode' => 'bb',
-    ));
+    ]);
 
     // Saving menu link items ends up on the edit menu page. To check the menu
     // link has the correct language default on edit, go to the menu link edit
diff --git a/core/modules/menu_ui/src/Tests/MenuNodeTest.php b/core/modules/menu_ui/src/Tests/MenuNodeTest.php
index 3fc8423fefb51cef0499d95a3b5e817dd1ec766d..26f6e4f9385f7769152883e7f6366b4c73bdde31 100644
--- a/core/modules/menu_ui/src/Tests/MenuNodeTest.php
+++ b/core/modules/menu_ui/src/Tests/MenuNodeTest.php
@@ -26,7 +26,7 @@ class MenuNodeTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('menu_ui', 'test_page_test', 'node', 'block', 'locale', 'language', 'content_translation');
+  public static $modules = ['menu_ui', 'test_page_test', 'node', 'block', 'locale', 'language', 'content_translation'];
 
   protected function setUp() {
     parent::setUp();
@@ -34,9 +34,9 @@ protected function setUp() {
     $this->drupalPlaceBlock('system_menu_block:main');
     $this->drupalPlaceBlock('page_title_block');
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
-    $this->editor = $this->drupalCreateUser(array(
+    $this->editor = $this->drupalCreateUser([
       'access administration pages',
       'administer content types',
       'administer menu',
@@ -47,7 +47,7 @@ protected function setUp() {
       'update content translations',
       'delete content translations',
       'translate any entity',
-    ));
+    ]);
     $this->drupalLogin($this->editor);
   }
 
@@ -68,9 +68,9 @@ function testMenuNodeFormWidget() {
     $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node add form.');
 
     // Disable the default main menu, so that no menus are enabled.
-    $edit = array(
+    $edit = [
       'menu_options[main]' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
 
     // Verify that no menu settings are displayed and nodes can be created.
@@ -78,47 +78,47 @@ function testMenuNodeFormWidget() {
     $this->assertText(t('Create Basic page'));
     $this->assertNoText(t('Menu settings'));
     $node_title = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'title[0][value]' => $node_title,
       'body[0][value]' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $node = $this->drupalGetNodeByTitle($node_title);
     $this->assertEqual($node->getTitle(), $edit['title[0][value]']);
 
     // Test that we cannot set a menu item from a menu that is not set as
     // available.
-    $edit = array(
+    $edit = [
       'menu_options[tools]' => 1,
       'menu_parent' => 'main:',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
     $this->assertText(t('The selected menu item is not under one of the selected menus.'));
-    $this->assertNoRaw(t('The content type %name has been updated.', array('%name' => 'Basic page')));
+    $this->assertNoRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
 
     // Enable Tools menu as available menu.
-    $edit = array(
+    $edit = [
       'menu_options[main]' => 1,
       'menu_options[tools]' => 1,
       'menu_parent' => 'main:',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
-    $this->assertRaw(t('The content type %name has been updated.', array('%name' => 'Basic page')));
+    $this->assertRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
 
     // Test that we can preview a node that will create a menu item.
-    $edit = array(
+    $edit = [
       'title[0][value]' => $node_title,
       'menu[enabled]' => 1,
       'menu[title]' => 'Test preview',
-    );
+    ];
     $this->drupalPostForm('node/add/page', $edit, t('Preview'));
 
     // Create a node.
     $node_title = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'title[0][value]' => $node_title,
       'body[0][value]' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
     $node = $this->drupalGetNodeByTitle($node_title);
     // Assert that there is no link for the node.
@@ -126,9 +126,9 @@ function testMenuNodeFormWidget() {
     $this->assertNoLink($node_title);
 
     // Edit the node, enable the menu link setting, but skip the link title.
-    $edit = array(
+    $edit = [
       'menu[enabled]' => 1,
-    );
+    ];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
     // Assert that there is no link for the node.
     $this->drupalGet('test-page');
@@ -165,11 +165,11 @@ function testMenuNodeFormWidget() {
     // Log back in as normal user.
     $this->drupalLogin($this->editor);
     // Edit the node and create a menu link.
-    $edit = array(
+    $edit = [
       'menu[enabled]' => 1,
       'menu[title]' => $node_title,
       'menu[weight]' => 17,
-    );
+    ];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
     // Assert that the link exists.
     $this->drupalGet('test-page');
@@ -190,20 +190,20 @@ function testMenuNodeFormWidget() {
     $this->assertFalse($link->isEnabled(), 'Saving a node with a disabled menu link keeps the menu link disabled.');
 
     // Edit the node and remove the menu link.
-    $edit = array(
+    $edit = [
       'menu[enabled]' => FALSE,
-    );
+    ];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
     // Assert that there is no link for the node.
     $this->drupalGet('test-page');
     $this->assertNoLink($node_title);
 
     // Add a menu link to the Administration menu.
-    $item = MenuLinkContent::create(array(
+    $item = MenuLinkContent::create([
       'link' => [['uri' => 'entity:node/' . $node->id()]],
       'title' => $this->randomMachineName(16),
       'menu_name' => 'admin',
-    ));
+    ]);
     $item->save();
 
     // Assert that disabled Administration menu is not shown on the
@@ -219,14 +219,14 @@ function testMenuNodeFormWidget() {
     $item->menu_name->value = 'tools';
     $item->save();
     // Create a second node.
-    $child_node = $this->drupalCreateNode(array('type' => 'article'));
+    $child_node = $this->drupalCreateNode(['type' => 'article']);
     // Assign a menu link to the second node, being a child of the first one.
-    $child_item = MenuLinkContent::create(array(
+    $child_item = MenuLinkContent::create([
       'link' => [['uri' => 'entity:node/' . $child_node->id()]],
       'title' => $this->randomMachineName(16),
       'parent' => $item->getPluginId(),
       'menu_name' => $item->getMenuName(),
-    ));
+    ]);
     $child_item->save();
     // Edit the first node.
     $this->drupalGet('node/' . $node->id() . '/edit');
@@ -242,7 +242,7 @@ function testMenuNodeFormWidget() {
    */
   function testMultilingualMenuNodeFormWidget() {
     // Setup languages.
-    $langcodes = array('de');
+    $langcodes = ['de'];
     foreach ($langcodes as $langcode) {
       ConfigurableLanguage::createFromLangcode($langcode)->save();
     }
@@ -257,7 +257,7 @@ function testMultilingualMenuNodeFormWidget() {
 
     $this->rebuildContainer();
 
-    $languages = array();
+    $languages = [];
     foreach ($langcodes as $langcode) {
       $languages[$langcode] = ConfigurableLanguage::load($langcode);
     }
@@ -265,14 +265,14 @@ function testMultilingualMenuNodeFormWidget() {
     // Use a UI form submission to make the node type and menu link content entity translatable.
     $this->drupalLogout();
     $this->drupalLogin($this->rootUser);
-    $edit = array(
+    $edit = [
       'entity_types[node]' => TRUE,
       'entity_types[menu_link_content]' => TRUE,
       'settings[node][page][settings][language][language_alterable]' => TRUE,
       'settings[node][page][translatable]' => TRUE,
       'settings[node][page][fields][title]' => TRUE,
       'settings[menu_link_content][menu_link_content][translatable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
 
     // Log out and back in as normal user.
@@ -297,42 +297,42 @@ function testMultilingualMenuNodeFormWidget() {
     $node->save();
 
     // Edit the node and create a menu link.
-    $edit = array(
+    $edit = [
       'menu[enabled]' => 1,
       'menu[title]' => $node_title,
       'menu[weight]' => 17,
-    );
-    $options = array('language' => $languages[$langcodes[0]]);
+    ];
+    $options = ['language' => $languages[$langcodes[0]]];
     $url = $node->toUrl('edit-form', $options);
     $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
 
     // Edit the node in a different language and translate the menu link.
-    $edit = array(
+    $edit = [
       'menu[enabled]' => 1,
       'menu[title]' => $translated_node_title,
       'menu[weight]' => 17,
-    );
-    $options = array('language' => $languages[$langcodes[1]]);
+    ];
+    $options = ['language' => $languages[$langcodes[1]]];
     $url = $node->toUrl('edit-form', $options);
     $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
 
     // Assert that the original link exists in the frontend.
-    $this->drupalGet('node/' . $node->id(), array('language' => $languages[$langcodes[0]]));
+    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[0]]]);
     $this->assertLink($node_title);
 
     // Assert that the translated link exists in the frontend.
-    $this->drupalGet('node/' . $node->id(), array('language' => $languages[$langcodes[1]]));
+    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[1]]]);
     $this->assertLink($translated_node_title);
 
     // Revisit the edit page in original language, check the loaded menu item title and save.
-    $options = array('language' => $languages[$langcodes[0]]);
+    $options = ['language' => $languages[$langcodes[0]]];
     $url = $node->toUrl('edit-form', $options);
     $this->drupalGet($url);
     $this->assertFieldById('edit-menu-title', $node_title);
     $this->drupalPostForm(NULL, [], t('Save') . ' ' . t('(this translation)'));
 
     // Revisit the edit page of the translation and check the loaded menu item title.
-    $options = array('language' => $languages[$langcodes[1]]);
+    $options = ['language' => $languages[$langcodes[1]]];
     $url = $node->toUrl('edit-form', $options);
     $this->drupalGet($url);
     $this->assertFieldById('edit-menu-title', $translated_node_title);
diff --git a/core/modules/menu_ui/src/Tests/MenuTest.php b/core/modules/menu_ui/src/Tests/MenuTest.php
index 9c4e1ce779a93977b72b43950eb7c681070fddb5..c9df569be300efc411185a6d6e0e823b5ef8f778 100644
--- a/core/modules/menu_ui/src/Tests/MenuTest.php
+++ b/core/modules/menu_ui/src/Tests/MenuTest.php
@@ -25,7 +25,7 @@ class MenuTest extends MenuWebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'block', 'contextual', 'help', 'path', 'test_page_test');
+  public static $modules = ['node', 'block', 'contextual', 'help', 'path', 'test_page_test'];
 
   /**
    * A user with administration rights.
@@ -67,11 +67,11 @@ protected function setUp() {
 
     $this->drupalPlaceBlock('page_title_block');
 
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
 
     // Create users.
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'administer blocks', 'administer menu', 'create article content'));
-    $this->authenticatedUser = $this->drupalCreateUser(array());
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer blocks', 'administer menu', 'create article content']);
+    $this->authenticatedUser = $this->drupalCreateUser([]);
   }
 
   /**
@@ -80,7 +80,7 @@ protected function setUp() {
   function testMenu() {
     // Log in the user.
     $this->drupalLogin($this->adminUser);
-    $this->items = array();
+    $this->items = [];
 
     $this->menu = $this->addCustomMenu();
     $this->doMenuTests();
@@ -132,7 +132,7 @@ function testMenu() {
     $instance = $this->getStandardMenuLink();
     $old_weight = $instance->getWeight();
     // Edit the static menu link.
-    $edit = array();
+    $edit = [];
     $edit['weight'] = 10;
     $id = $instance->getPluginId();
     $this->drupalPostForm("admin/structure/menu/link/$id/edit", $edit, t('Save'));
@@ -153,11 +153,11 @@ function addCustomMenuCRUD() {
     $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI);
     $label = $this->randomMachineName(16);
 
-    $menu = Menu::create(array(
+    $menu = Menu::create([
       'id' => $menu_name,
       'label' => $label,
       'description' => 'Description text',
-    ));
+    ]);
     $menu->save();
 
     // Assert the new menu.
@@ -183,20 +183,20 @@ function addCustomMenu() {
     $this->drupalGet('admin/structure/menu/add');
     $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI + 1);
     $label = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'id' => $menu_name,
       'description' => '',
       'label' => $label,
-    );
+    ];
     $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
 
     // Verify that using a menu_name that is too long results in a validation
     // message.
-    $this->assertRaw(t('@name cannot be longer than %max characters but is currently %length characters long.', array(
+    $this->assertRaw(t('@name cannot be longer than %max characters but is currently %length characters long.', [
       '@name' => t('Menu name'),
       '%max' => MENU_MAX_MENU_NAME_LENGTH_UI,
       '%length' => Unicode::strlen($menu_name),
-    )));
+    ]));
 
     // Change the menu_name so it no longer exceeds the maximum length.
     $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI);
@@ -204,13 +204,13 @@ function addCustomMenu() {
     $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
 
     // Verify that no validation error is given for menu_name length.
-    $this->assertNoRaw(t('@name cannot be longer than %max characters but is currently %length characters long.', array(
+    $this->assertNoRaw(t('@name cannot be longer than %max characters but is currently %length characters long.', [
       '@name' => t('Menu name'),
       '%max' => MENU_MAX_MENU_NAME_LENGTH_UI,
       '%length' => Unicode::strlen($menu_name),
-    )));
+    ]));
     // Verify that the confirmation message is displayed.
-    $this->assertRaw(t('Menu %label has been added.', array('%label' => $label)));
+    $this->assertRaw(t('Menu %label has been added.', ['%label' => $label]));
     $this->drupalGet('admin/structure/menu');
     $this->assertText($label, 'Menu created');
 
@@ -236,13 +236,13 @@ function deleteCustomMenu() {
     $label = $this->menu->label();
 
     // Delete custom menu.
-    $this->drupalPostForm("admin/structure/menu/manage/$menu_name/delete", array(), t('Delete'));
+    $this->drupalPostForm("admin/structure/menu/manage/$menu_name/delete", [], t('Delete'));
     $this->assertResponse(200);
-    $this->assertRaw(t('The menu %title has been deleted.', array('%title' => $label)), 'Custom menu was deleted');
+    $this->assertRaw(t('The menu %title has been deleted.', ['%title' => $label]), 'Custom menu was deleted');
     $this->assertNull(Menu::load($menu_name), 'Custom menu was deleted');
     // Test if all menu links associated with the menu were removed from
     // database.
-    $result = entity_load_multiple_by_properties('menu_link_content', array('menu_name' => $menu_name));
+    $result = entity_load_multiple_by_properties('menu_link_content', ['menu_name' => $menu_name]);
     $this->assertFalse($result, 'All menu links associated with the custom menu were deleted.');
 
     // Make sure there's no delete button on system menus.
@@ -265,32 +265,32 @@ function doMenuTests() {
 
     $this->clickLink(t('Add link'));
     $link_title = $this->randomString();
-    $this->drupalPostForm(NULL, array('link[0][uri]' => '/', 'title[0][value]' => $link_title), t('Save'));
+    $this->drupalPostForm(NULL, ['link[0][uri]' => '/', 'title[0][value]' => $link_title], t('Save'));
     $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
     // Test the 'Edit' operation.
     $this->clickLink(t('Edit'));
     $this->assertFieldByName('title[0][value]', $link_title);
     $link_title = $this->randomString();
-    $this->drupalPostForm(NULL, array('title[0][value]' => $link_title), t('Save'));
+    $this->drupalPostForm(NULL, ['title[0][value]' => $link_title], t('Save'));
     $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
     // Test the 'Delete' operation.
     $this->clickLink(t('Delete'));
-    $this->assertRaw(t('Are you sure you want to delete the custom menu link %item?', array('%item' => $link_title)));
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->assertRaw(t('Are you sure you want to delete the custom menu link %item?', ['%item' => $link_title]));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
 
     // Add nodes to use as links for menu links.
-    $node1 = $this->drupalCreateNode(array('type' => 'article'));
-    $node2 = $this->drupalCreateNode(array('type' => 'article'));
-    $node3 = $this->drupalCreateNode(array('type' => 'article'));
-    $node4 = $this->drupalCreateNode(array('type' => 'article'));
+    $node1 = $this->drupalCreateNode(['type' => 'article']);
+    $node2 = $this->drupalCreateNode(['type' => 'article']);
+    $node3 = $this->drupalCreateNode(['type' => 'article']);
+    $node4 = $this->drupalCreateNode(['type' => 'article']);
     // Create a node with an alias.
-    $node5 = $this->drupalCreateNode(array(
+    $node5 = $this->drupalCreateNode([
       'type' => 'article',
-      'path' => array(
+      'path' => [
         'alias' => '/node5',
-      ),
-    ));
+      ],
+    ]);
 
     // Verify add link button.
     $this->drupalGet('admin/structure/menu');
@@ -310,25 +310,25 @@ function doMenuTests() {
     // -- item2
     // --- item3
 
-    $this->assertMenuLink($item1->getPluginId(), array(
-      'children' => array($item2->getPluginId(), $item3->getPluginId()),
-      'parents' => array($item1->getPluginId()),
+    $this->assertMenuLink($item1->getPluginId(), [
+      'children' => [$item2->getPluginId(), $item3->getPluginId()],
+      'parents' => [$item1->getPluginId()],
       // We assert the language code here to make sure that the language
       // selection element degrades gracefully without the Language module.
       'langcode' => 'en',
-    ));
-    $this->assertMenuLink($item2->getPluginId(), array(
-      'children' => array($item3->getPluginId()),
-      'parents' => array($item2->getPluginId(), $item1->getPluginId()),
+    ]);
+    $this->assertMenuLink($item2->getPluginId(), [
+      'children' => [$item3->getPluginId()],
+      'parents' => [$item2->getPluginId(), $item1->getPluginId()],
       // See above.
       'langcode' => 'en',
-    ));
-    $this->assertMenuLink($item3->getPluginId(), array(
-      'children' => array(),
-      'parents' => array($item3->getPluginId(), $item2->getPluginId(), $item1->getPluginId()),
+    ]);
+    $this->assertMenuLink($item3->getPluginId(), [
+      'children' => [],
+      'parents' => [$item3->getPluginId(), $item2->getPluginId(), $item1->getPluginId()],
       // See above.
       'langcode' => 'en',
-    ));
+    ]);
 
     // Verify menu links.
     $this->verifyMenuLink($item1, $node1);
@@ -350,26 +350,26 @@ function doMenuTests() {
     // -- item5
     // -- item6
 
-    $this->assertMenuLink($item4->getPluginId(), array(
-      'children' => array($item5->getPluginId(), $item6->getPluginId()),
-      'parents' => array($item4->getPluginId()),
+    $this->assertMenuLink($item4->getPluginId(), [
+      'children' => [$item5->getPluginId(), $item6->getPluginId()],
+      'parents' => [$item4->getPluginId()],
       // See above.
       'langcode' => 'en',
-    ));
-    $this->assertMenuLink($item5->getPluginId(), array(
-      'children' => array(),
-      'parents' => array($item5->getPluginId(), $item4->getPluginId()),
+    ]);
+    $this->assertMenuLink($item5->getPluginId(), [
+      'children' => [],
+      'parents' => [$item5->getPluginId(), $item4->getPluginId()],
       'langcode' => 'en',
-    ));
-    $this->assertMenuLink($item6->getPluginId(), array(
-      'children' => array(),
-      'parents' => array($item6->getPluginId(), $item4->getPluginId()),
+    ]);
+    $this->assertMenuLink($item6->getPluginId(), [
+      'children' => [],
+      'parents' => [$item6->getPluginId(), $item4->getPluginId()],
       'route_name' => 'entity.node.canonical',
-      'route_parameters' => array('node' => $node5->id()),
+      'route_parameters' => ['node' => $node5->id()],
       'url' => '',
       // See above.
       'langcode' => 'en',
-    ));
+    ]);
 
     // Modify menu links.
     $this->modifyMenuLink($item1);
@@ -390,49 +390,49 @@ function doMenuTests() {
     // ---- item3
     // -- item6
 
-    $this->assertMenuLink($item1->getPluginId(), array(
-      'children' => array(),
-      'parents' => array($item1->getPluginId()),
+    $this->assertMenuLink($item1->getPluginId(), [
+      'children' => [],
+      'parents' => [$item1->getPluginId()],
       // See above.
       'langcode' => 'en',
-    ));
-    $this->assertMenuLink($item4->getPluginId(), array(
-      'children' => array($item5->getPluginId(), $item6->getPluginId(), $item2->getPluginId(), $item3->getPluginId()),
-      'parents' => array($item4->getPluginId()),
+    ]);
+    $this->assertMenuLink($item4->getPluginId(), [
+      'children' => [$item5->getPluginId(), $item6->getPluginId(), $item2->getPluginId(), $item3->getPluginId()],
+      'parents' => [$item4->getPluginId()],
       // See above.
       'langcode' => 'en',
-    ));
+    ]);
 
-    $this->assertMenuLink($item5->getPluginId(), array(
-      'children' => array($item2->getPluginId(), $item3->getPluginId()),
-      'parents' => array($item5->getPluginId(), $item4->getPluginId()),
+    $this->assertMenuLink($item5->getPluginId(), [
+      'children' => [$item2->getPluginId(), $item3->getPluginId()],
+      'parents' => [$item5->getPluginId(), $item4->getPluginId()],
       // See above.
       'langcode' => 'en',
-    ));
-    $this->assertMenuLink($item2->getPluginId(), array(
-      'children' => array($item3->getPluginId()),
-      'parents' => array($item2->getPluginId(), $item5->getPluginId(), $item4->getPluginId()),
+    ]);
+    $this->assertMenuLink($item2->getPluginId(), [
+      'children' => [$item3->getPluginId()],
+      'parents' => [$item2->getPluginId(), $item5->getPluginId(), $item4->getPluginId()],
       // See above.
       'langcode' => 'en',
-    ));
-    $this->assertMenuLink($item3->getPluginId(), array(
-      'children' => array(),
-      'parents' => array($item3->getPluginId(), $item2->getPluginId(), $item5->getPluginId(), $item4->getPluginId()),
+    ]);
+    $this->assertMenuLink($item3->getPluginId(), [
+      'children' => [],
+      'parents' => [$item3->getPluginId(), $item2->getPluginId(), $item5->getPluginId(), $item4->getPluginId()],
       // See above.
       'langcode' => 'en',
-    ));
+    ]);
 
     // Add 102 menu links with increasing weights, then make sure the last-added
     // item's weight doesn't get changed because of the old hardcoded delta=50.
-    $items = array();
+    $items = [];
     for ($i = -50; $i <= 51; $i++) {
       $items[$i] = $this->addMenuLink('', '/node/' . $node1->id(), $menu_name, TRUE, strval($i));
     }
-    $this->assertMenuLink($items[51]->getPluginId(), array('weight' => '51'));
+    $this->assertMenuLink($items[51]->getPluginId(), ['weight' => '51']);
 
     // Disable a link and then re-enable the link via the overview form.
     $this->disableMenuLink($item1);
-    $edit = array();
+    $edit = [];
     $edit['links[menu_plugin_id:' . $item1->getPluginId() . '][enabled]'] = TRUE;
     $this->drupalPostForm('admin/structure/menu/manage/' . $item1->getMenuName(), $edit, t('Save'));
 
@@ -446,15 +446,15 @@ function doMenuTests() {
     $item5->save();
 
     // Verify in the database.
-    $this->assertMenuLink($item1->getPluginId(), array('enabled' => 1));
+    $this->assertMenuLink($item1->getPluginId(), ['enabled' => 1]);
 
     // Add an external link.
     $item7 = $this->addMenuLink('', 'https://www.drupal.org', $menu_name);
-    $this->assertMenuLink($item7->getPluginId(), array('url' => 'https://www.drupal.org'));
+    $this->assertMenuLink($item7->getPluginId(), ['url' => 'https://www.drupal.org']);
 
     // Add <front> menu item.
     $item8 = $this->addMenuLink('', '/', $menu_name);
-    $this->assertMenuLink($item8->getPluginId(), array('route_name' => '<front>'));
+    $this->assertMenuLink($item8->getPluginId(), ['route_name' => '<front>']);
     $this->drupalGet('');
     $this->assertResponse(200);
     // Make sure we get routed correctly.
@@ -501,7 +501,7 @@ function testMenuQueryAndFragment() {
 
     // Now change the path to something without query and fragment.
     $path = '/test-page';
-    $this->drupalPostForm('admin/structure/menu/item/' . $item->id() . '/edit', array('link[0][uri]' => $path), t('Save'));
+    $this->drupalPostForm('admin/structure/menu/item/' . $item->id() . '/edit', ['link[0][uri]' => $path], t('Save'));
     $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
     $this->assertFieldByName('link[0][uri]', $path, 'Path no longer has query or fragment.');
 
@@ -512,7 +512,7 @@ function testMenuQueryAndFragment() {
     $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
     $this->assertFieldByName('link[0][uri]', $path, 'Path is found with both query and fragment.');
 
-    $this->drupalPostForm('admin/structure/menu/item/' . $item->id() . '/edit', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/menu/item/' . $item->id() . '/edit', [], t('Save'));
 
     $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
     $this->assertFieldByName('link[0][uri]', $path, 'Path is found with both query and fragment.');
@@ -523,9 +523,9 @@ function testMenuQueryAndFragment() {
    */
   function testSystemMenuRename() {
     $this->drupalLogin($this->adminUser);
-    $edit = array(
+    $edit = [
       'label' => $this->randomMachineName(16),
-    );
+    ];
     $this->drupalPostForm('admin/structure/menu/manage/main', $edit, t('Save'));
 
     // Make sure menu shows up with new name in block addition.
@@ -539,12 +539,12 @@ function testSystemMenuRename() {
    * Tests that menu items pointing to unpublished nodes are editable.
    */
   function testUnpublishedNodeMenuItem() {
-    $this->drupalLogin($this->drupalCreateUser(array('access administration pages', 'administer blocks', 'administer menu', 'create article content', 'bypass node access')));
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer blocks', 'administer menu', 'create article content', 'bypass node access']));
     // Create an unpublished node.
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'type' => 'article',
       'status' => NodeInterface::NOT_PUBLISHED,
-    ));
+    ]);
 
     $item = $this->addMenuLink('', '/node/' . $node->id());
     $this->modifyMenuLink($item);
@@ -564,20 +564,20 @@ function testUnpublishedNodeMenuItem() {
    * Tests the contextual links on a menu block.
    */
   public function testBlockContextualLinks() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer menu', 'access contextual links', 'administer blocks')));
+    $this->drupalLogin($this->drupalCreateUser(['administer menu', 'access contextual links', 'administer blocks']));
     $custom_menu = $this->addCustomMenu();
     $this->addMenuLink('', '/', $custom_menu->id());
-    $block = $this->drupalPlaceBlock('system_menu_block:' . $custom_menu->id(), array('label' => 'Custom menu', 'provider' => 'system'));
+    $block = $this->drupalPlaceBlock('system_menu_block:' . $custom_menu->id(), ['label' => 'Custom menu', 'provider' => 'system']);
     $this->drupalGet('test-page');
 
     $id = 'block:block=' . $block->id() . ':langcode=en|menu:menu=' . $custom_menu->id() . ':langcode=en';
     // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:assertContextualLinkPlaceHolder()
-    $this->assertRaw('<div data-contextual-id="' . $id . '"></div>', format_string('Contextual link placeholder with id @id exists.', array('@id' => $id)));
+    $this->assertRaw('<div data-contextual-id="' . $id . '"></div>', format_string('Contextual link placeholder with id @id exists.', ['@id' => $id]));
 
     // Get server-rendered contextual links.
     // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:renderContextualLinks()
-    $post = array('ids[0]' => $id);
-    $response = $this->drupalPost('contextual/render', 'application/json', $post, array('query' => array('destination' => 'test-page')));
+    $post = ['ids[0]' => $id];
+    $response = $this->drupalPost('contextual/render', 'application/json', $post, ['query' => ['destination' => 'test-page']]);
     $this->assertResponse(200);
     $json = Json::decode($response);
     $this->assertIdentical($json[$id], '<ul class="contextual-links"><li class="block-configure"><a href="' . base_path() . 'admin/structure/block/manage/' . $block->id() . '">Configure block</a></li><li class="entitymenuedit-form"><a href="' . base_path() . 'admin/structure/menu/manage/' . $custom_menu->id() . '">Edit menu</a></li></ul>');
@@ -608,7 +608,7 @@ function addMenuLink($parent = '', $path = '/', $menu_name = 'tools', $expanded
     $this->assertResponse(200);
 
     $title = '!link_' . $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'link[0][uri]' => $path,
       'title[0][value]' => $title,
       'description[0][value]' => '',
@@ -616,18 +616,18 @@ function addMenuLink($parent = '', $path = '/', $menu_name = 'tools', $expanded
       'expanded[value]' => $expanded,
       'menu_parent' => $menu_name . ':' . $parent,
       'weight[0][value]' => $weight,
-    );
+    ];
 
     // Add menu link.
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertResponse(200);
     $this->assertText('The menu link has been saved.');
 
-    $menu_links = entity_load_multiple_by_properties('menu_link_content', array('title' => $title));
+    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $title]);
 
     $menu_link = reset($menu_links);
     $this->assertTrue($menu_link, 'Menu link was found in database.');
-    $this->assertMenuLink($menu_link->getPluginId(), array('menu_name' => $menu_name, 'children' => array(), 'parent' => $parent));
+    $this->assertMenuLink($menu_link->getPluginId(), ['menu_name' => $menu_name, 'children' => [], 'parent' => $parent]);
 
     return $menu_link;
   }
@@ -636,13 +636,13 @@ function addMenuLink($parent = '', $path = '/', $menu_name = 'tools', $expanded
    * Attempts to add menu link with invalid path or no access permission.
    */
   function addInvalidMenuLink() {
-    foreach (array('access' => '/admin/people/permissions') as $type => $link_path) {
-      $edit = array(
+    foreach (['access' => '/admin/people/permissions'] as $type => $link_path) {
+      $edit = [
         'link[0][uri]' => $link_path,
         'title[0][value]' => 'title',
-      );
+      ];
       $this->drupalPostForm("admin/structure/menu/manage/{$this->menu->id()}/add", $edit, t('Save'));
-      $this->assertRaw(t("The path '@link_path' is inaccessible.", array('@link_path' => $link_path)), 'Menu link was not created');
+      $this->assertRaw(t("The path '@link_path' is inaccessible.", ['@link_path' => $link_path]), 'Menu link was not created');
     }
   }
 
@@ -651,7 +651,7 @@ function addInvalidMenuLink() {
    */
   function checkInvalidParentMenuLinks() {
     $last_link = NULL;
-    $created_links = array();
+    $created_links = [];
 
     // Get the max depth of the tree.
     $menu_link_tree = \Drupal::service('menu.link_tree');
@@ -661,7 +661,7 @@ function checkInvalidParentMenuLinks() {
     for ($i = 0; $i <= $max_depth - 1; $i++) {
       $parent = $last_link ? 'tools:' . $last_link->getPluginId() : 'tools:';
       $title = 'title' . $i;
-      $edit = array(
+      $edit = [
         'link[0][uri]' => '/',
         'title[0][value]' => $title,
         'menu_parent' => $parent,
@@ -669,9 +669,9 @@ function checkInvalidParentMenuLinks() {
         'enabled[value]' => 1,
         'expanded[value]' => FALSE,
         'weight[0][value]' => '0',
-      );
+      ];
       $this->drupalPostForm("admin/structure/menu/manage/{$this->menu->id()}/add", $edit, t('Save'));
-      $menu_links = entity_load_multiple_by_properties('menu_link_content', array('title' => $title));
+      $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $title]);
       $last_link = reset($menu_links);
       $created_links[]  = 'tools:' . $last_link->getPluginId();
     }
@@ -714,7 +714,7 @@ function verifyMenuLink(MenuLinkContent $item, $item_node, MenuLinkContent $pare
       // Verify menu link link.
       $this->clickLink($title);
       $title = $parent_node->label();
-      $this->assertTitle(t("@title | Drupal", array('@title' => $title)), 'Parent menu link link target was correct');
+      $this->assertTitle(t("@title | Drupal", ['@title' => $title]), 'Parent menu link link target was correct');
     }
 
     // Verify menu link.
@@ -724,7 +724,7 @@ function verifyMenuLink(MenuLinkContent $item, $item_node, MenuLinkContent $pare
     // Verify menu link link.
     $this->clickLink($title);
     $title = $item_node->label();
-    $this->assertTitle(t("@title | Drupal", array('@title' => $title)), 'Menu link link target was correct');
+    $this->assertTitle(t("@title | Drupal", ['@title' => $title]), 'Menu link link target was correct');
   }
 
   /**
@@ -740,9 +740,9 @@ function verifyMenuLink(MenuLinkContent $item, $item_node, MenuLinkContent $pare
   function moveMenuLink(MenuLinkContent $item, $parent, $menu_name) {
     $mlid = $item->id();
 
-    $edit = array(
+    $edit = [
       'menu_parent' => $menu_name . ':' . $parent,
-    );
+    ];
     $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
     $this->assertResponse(200);
   }
@@ -760,7 +760,7 @@ function modifyMenuLink(MenuLinkContent $item) {
     $title = $item->getTitle();
 
     // Edit menu link.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $title;
     $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
     $this->assertResponse(200);
@@ -780,7 +780,7 @@ function modifyMenuLink(MenuLinkContent $item) {
    */
   function resetMenuLink(MenuLinkInterface $menu_link, $old_weight) {
     // Reset menu link.
-    $this->drupalPostForm("admin/structure/menu/link/{$menu_link->getPluginId()}/reset", array(), t('Reset'));
+    $this->drupalPostForm("admin/structure/menu/link/{$menu_link->getPluginId()}/reset", [], t('Reset'));
     $this->assertResponse(200);
     $this->assertRaw(t('The menu link was reset to its default settings.'), 'Menu link was reset');
 
@@ -800,9 +800,9 @@ function deleteMenuLink(MenuLinkContent $item) {
     $title = $item->getTitle();
 
     // Delete menu link.
-    $this->drupalPostForm("admin/structure/menu/item/$mlid/delete", array(), t('Delete'));
+    $this->drupalPostForm("admin/structure/menu/item/$mlid/delete", [], t('Delete'));
     $this->assertResponse(200);
-    $this->assertRaw(t('The menu link %title has been deleted.', array('%title' => $title)), 'Menu link was deleted');
+    $this->assertRaw(t('The menu link %title has been deleted.', ['%title' => $title]), 'Menu link was deleted');
 
     // Verify deletion.
     $this->drupalGet('');
@@ -841,7 +841,7 @@ function disableMenuLink(MenuLinkContent $item) {
 
     // Unlike most other modules, there is no confirmation message displayed.
     // Verify in the database.
-    $this->assertMenuLink($item->getPluginId(), array('enabled' => 0));
+    $this->assertMenuLink($item->getPluginId(), ['enabled' => 0]);
   }
 
   /**
@@ -856,7 +856,7 @@ function enableMenuLink(MenuLinkContent $item) {
     $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
 
     // Verify in the database.
-    $this->assertMenuLink($item->getPluginId(), array('enabled' => 1));
+    $this->assertMenuLink($item->getPluginId(), ['enabled' => 1]);
   }
 
   /**
@@ -864,7 +864,7 @@ function enableMenuLink(MenuLinkContent $item) {
    * AJAX callback.
    */
   public function testMenuParentsJsAccess() {
-    $admin = $this->drupalCreateUser(array('administer menu'));
+    $admin = $this->drupalCreateUser(['administer menu']);
     $this->drupalLogin($admin);
     // Just check access to the callback overall, the POST data is irrelevant.
     $this->drupalGetAjax('admin/structure/menu/parents');
diff --git a/core/modules/menu_ui/src/Tests/MenuWebTestBase.php b/core/modules/menu_ui/src/Tests/MenuWebTestBase.php
index c08fc1421993ca61508525187d275fd1eb2c1571..bda38ba57170a0a65738473865d973155ed9b344 100644
--- a/core/modules/menu_ui/src/Tests/MenuWebTestBase.php
+++ b/core/modules/menu_ui/src/Tests/MenuWebTestBase.php
@@ -14,7 +14,7 @@ abstract class MenuWebTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('menu_ui', 'menu_link_content');
+  public static $modules = ['menu_ui', 'menu_link_content'];
 
   /**
    * Fetches the menu item from the database and compares it to expected item.
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuCacheTagsTest.php b/core/modules/menu_ui/tests/src/Functional/MenuCacheTagsTest.php
index 03ff031e5f2016133dc8ba0f99557f1f520cf7db..f7bf7f88d40c386a200c9942a1247a6b4a5ee19b 100644
--- a/core/modules/menu_ui/tests/src/Functional/MenuCacheTagsTest.php
+++ b/core/modules/menu_ui/tests/src/Functional/MenuCacheTagsTest.php
@@ -17,7 +17,7 @@ class MenuCacheTagsTest extends PageCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('menu_ui', 'block', 'test_page_test');
+  public static $modules = ['menu_ui', 'block', 'test_page_test'];
 
   /**
    * Tests cache tags presence and invalidation of the Menu entity.
@@ -29,23 +29,23 @@ public function testMenuBlock() {
     $url = Url::fromRoute('test_page_test.test_page');
 
     // Create a Llama menu, add a link to it and place the corresponding block.
-    $menu = Menu::create(array(
+    $menu = Menu::create([
       'id' => 'llama',
       'label' => 'Llama',
       'description' => 'Description text',
-    ));
+    ]);
     $menu->save();
     /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
     $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
     // Move a link into the new menu.
-    $menu_link = $menu_link_manager->updateDefinition('test_page_test.test_page', array('menu_name' => 'llama', 'parent' => ''));
-    $block = $this->drupalPlaceBlock('system_menu_block:llama', array('label' => 'Llama', 'provider' => 'system', 'region' => 'footer'));
+    $menu_link = $menu_link_manager->updateDefinition('test_page_test.test_page', ['menu_name' => 'llama', 'parent' => '']);
+    $block = $this->drupalPlaceBlock('system_menu_block:llama', ['label' => 'Llama', 'provider' => 'system', 'region' => 'footer']);
 
     // Prime the page cache.
     $this->verifyPageCache($url, 'MISS');
 
     // Verify a cache hit, but also the presence of the correct cache tags.
-    $expected_tags = array(
+    $expected_tags = [
       'http_response',
       'rendered',
       'block_view',
@@ -55,7 +55,7 @@ public function testMenuBlock() {
       // The cache contexts associated with the (in)accessible menu links are
       // bubbled.
       'config:user.role.anonymous',
-    );
+    ];
     $this->verifyPageCache($url, 'HIT', $expected_tags);
 
     // Verify that after modifying the menu, there is a cache miss.
@@ -68,7 +68,7 @@ public function testMenuBlock() {
     $this->verifyPageCache($url, 'HIT');
 
     // Verify that after modifying the menu link weight, there is a cache miss.
-    $menu_link_manager->updateDefinition('test_page_test.test_page', array('weight' => -10));
+    $menu_link_manager->updateDefinition('test_page_test.test_page', ['weight' => -10]);
     $this->pass('Test modification of menu link.', 'Debug');
     $this->verifyPageCache($url, 'MISS');
 
@@ -77,7 +77,7 @@ public function testMenuBlock() {
 
     // Verify that after adding a menu link, there is a cache miss.
     $this->pass('Test addition of menu link.', 'Debug');
-    $menu_link_2 = MenuLinkContent::create(array(
+    $menu_link_2 = MenuLinkContent::create([
       'id' => '',
       'parent' => '',
       'title' => 'Alpaca',
@@ -86,7 +86,7 @@ public function testMenuBlock() {
         'uri' => 'internal:/',
       ]],
       'bundle' => 'menu_name',
-    ));
+    ]);
     $menu_link_2->save();
     $this->verifyPageCache($url, 'MISS');
 
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuLinkReorderTest.php b/core/modules/menu_ui/tests/src/Functional/MenuLinkReorderTest.php
index e0f7cc874f74efa667de702b91f8c52c4acf3cd3..163853dc39f8053ea24b1238e1d03e75246bd42e 100644
--- a/core/modules/menu_ui/tests/src/Functional/MenuLinkReorderTest.php
+++ b/core/modules/menu_ui/tests/src/Functional/MenuLinkReorderTest.php
@@ -23,7 +23,7 @@ class MenuLinkReorderTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('menu_ui', 'test_page_test', 'node', 'block');
+  public static $modules = ['menu_ui', 'test_page_test', 'node', 'block'];
 
   /**
    * Test creating, editing, deleting menu links via node form widget.
@@ -38,17 +38,17 @@ function testDefaultMenuLinkReorder() {
     $this->assertLink('Home');
 
     // The administrator user that can re-order menu links.
-    $this->administrator = $this->drupalCreateUser(array(
+    $this->administrator = $this->drupalCreateUser([
       'administer site configuration',
       'access administration pages',
       'administer menu',
-    ));
+    ]);
     $this->drupalLogin($this->administrator);
 
     // Change the weight of the link to a non default value.
-    $edit = array(
+    $edit = [
       'links[menu_plugin_id:test_page_test.front_page][weight]' => -10,
-    );
+    ];
     $this->drupalPostForm('admin/structure/menu/manage/main', $edit, t('Save'));
 
     // The link is still there.
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuUninstallTest.php b/core/modules/menu_ui/tests/src/Functional/MenuUninstallTest.php
index 269454e30fb186dd11cf4b552bda99f1e230f15e..a0320f44b0ff67cd6736819c6263961c6557772d 100644
--- a/core/modules/menu_ui/tests/src/Functional/MenuUninstallTest.php
+++ b/core/modules/menu_ui/tests/src/Functional/MenuUninstallTest.php
@@ -17,15 +17,15 @@ class MenuUninstallTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('menu_ui');
+  public static $modules = ['menu_ui'];
 
   /**
    * Tests Menu uninstall.
    */
   public function testMenuUninstall() {
-    \Drupal::service('module_installer')->uninstall(array('menu_ui'));
+    \Drupal::service('module_installer')->uninstall(['menu_ui']);
 
-    \Drupal::entityManager()->getStorage('menu')->resetCache(array('admin'));
+    \Drupal::entityManager()->getStorage('menu')->resetCache(['admin']);
 
     $this->assertTrue(Menu::load('admin'), 'The \'admin\' menu still exists after uninstalling Menu UI module.');
   }
diff --git a/core/modules/migrate/migrate.api.php b/core/modules/migrate/migrate.api.php
index aea0d77c476833387a81d6532b6a7bf11d0b5def..eefda3c38474438b7c287ed00a0f36b1f2797248 100644
--- a/core/modules/migrate/migrate.api.php
+++ b/core/modules/migrate/migrate.api.php
@@ -103,7 +103,7 @@
  */
 function hook_migrate_prepare_row(Row $row, MigrateSourceInterface $source, MigrationInterface $migration) {
   if ($migration->id() == 'd6_filter_formats') {
-    $value = $source->getDatabase()->query('SELECT value FROM {variable} WHERE name = :name', array(':name' => 'mymodule_filter_foo_' . $row->getSourceProperty('format')))->fetchField();
+    $value = $source->getDatabase()->query('SELECT value FROM {variable} WHERE name = :name', [':name' => 'mymodule_filter_foo_' . $row->getSourceProperty('format')])->fetchField();
     if ($value) {
       $row->setSourceProperty('settings:mymodule:foo', unserialize($value));
     }
diff --git a/core/modules/migrate/migrate.module b/core/modules/migrate/migrate.module
index 9cec273cdd1472f6c99c05b9a888320ac55cdbae..3b92463928d6bb7ed4cb2f66eadb725c7dd7da39 100644
--- a/core/modules/migrate/migrate.module
+++ b/core/modules/migrate/migrate.module
@@ -15,7 +15,7 @@ function migrate_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.migrate':
       $output = '<h3>' . t('About') . '</h3>';
       $output .= '<p>';
-      $output .= t('The Migrate module provides a framework for migrating data, usually from an external source into your site. It does not provide a user interface. For more information, see the <a href=":migrate">online documentation for the Migrate module</a>.', array(':migrate' => 'https://www.drupal.org/documentation/modules/migrate'));
+      $output .= t('The Migrate module provides a framework for migrating data, usually from an external source into your site. It does not provide a user interface. For more information, see the <a href=":migrate">online documentation for the Migrate module</a>.', [':migrate' => 'https://www.drupal.org/documentation/modules/migrate']);
       $output .= '</p>';
       return $output;
   }
diff --git a/core/modules/migrate/src/Exception/RequirementsException.php b/core/modules/migrate/src/Exception/RequirementsException.php
index 4c17dd6172ab5934e93c90a7b386c5a9e27e3a31..93da7ee4bcc9936b47637d702d6ac5ccc36c7956 100644
--- a/core/modules/migrate/src/Exception/RequirementsException.php
+++ b/core/modules/migrate/src/Exception/RequirementsException.php
@@ -56,7 +56,7 @@ public function getRequirementsString() {
     $output = '';
     foreach ($this->requirements as $requirement_type => $requirements) {
       if (!is_array($requirements)) {
-        $requirements = array($requirements);
+        $requirements = [$requirements];
       }
 
       foreach ($requirements as $value) {
diff --git a/core/modules/migrate/src/MigrateExecutable.php b/core/modules/migrate/src/MigrateExecutable.php
index ff05dfecf43ad53dae68e3777da305024b3e58d0..9d48618f58c91b7d740cb8fe4364541bb4c0e8ed 100644
--- a/core/modules/migrate/src/MigrateExecutable.php
+++ b/core/modules/migrate/src/MigrateExecutable.php
@@ -65,7 +65,7 @@ class MigrateExecutable implements MigrateExecutableInterface {
    *
    * @var array
    */
-  protected $counts = array();
+  protected $counts = [];
 
   /**
    * The source.
@@ -151,10 +151,10 @@ public function import() {
     // Only begin the import operation if the migration is currently idle.
     if ($this->migration->getStatus() !== MigrationInterface::STATUS_IDLE) {
       $this->message->display($this->t('Migration @id is busy with another operation: @status',
-        array(
+        [
           '@id' => $this->migration->id(),
           '@status' => $this->t($this->migration->getStatusLabel()),
-        )), 'error');
+        ]), 'error');
       return MigrationInterface::RESULT_FAILED;
     }
     $this->getEventDispatcher()->dispatch(MigrateEvents::PRE_IMPORT, new MigrateImportEvent($this->migration, $this->message));
@@ -167,11 +167,11 @@ public function import() {
       $this->message->display(
         $this->t(
           'Migration @id did not meet the requirements. @message @requirements',
-          array(
+          [
             '@id' => $this->migration->id(),
             '@message' => $e->getMessage(),
             '@requirements' => $e->getRequirementsString(),
-          )
+          ]
         ),
         'error'
       );
@@ -189,7 +189,7 @@ public function import() {
     }
     catch (\Exception $e) {
       $this->message->display(
-        $this->t('Migration failed with source plugin exception: @e', array('@e' => $e->getMessage())), 'error');
+        $this->t('Migration failed with source plugin exception: @e', ['@e' => $e->getMessage()]), 'error');
       $this->migration->setStatus(MigrationInterface::STATUS_IDLE);
       return MigrationInterface::RESULT_FAILED;
     }
@@ -204,7 +204,7 @@ public function import() {
         $save = TRUE;
       }
       catch (MigrateException $e) {
-        $this->migration->getIdMap()->saveIdMapping($row, array(), $e->getStatus());
+        $this->migration->getIdMap()->saveIdMapping($row, [], $e->getStatus());
         $this->saveMessage($e->getMessage(), $e->getLevel());
         $save = FALSE;
       }
@@ -230,7 +230,7 @@ public function import() {
             }
           }
           else {
-            $id_map->saveIdMapping($row, array(), MigrateIdMapInterface::STATUS_FAILED);
+            $id_map->saveIdMapping($row, [], MigrateIdMapInterface::STATUS_FAILED);
             if (!$id_map->messageCount()) {
               $message = $this->t('New object was not saved, no error provided');
               $this->saveMessage($message);
@@ -239,11 +239,11 @@ public function import() {
           }
         }
         catch (MigrateException $e) {
-          $this->migration->getIdMap()->saveIdMapping($row, array(), $e->getStatus());
+          $this->migration->getIdMap()->saveIdMapping($row, [], $e->getStatus());
           $this->saveMessage($e->getMessage(), $e->getLevel());
         }
         catch (\Exception $e) {
-          $this->migration->getIdMap()->saveIdMapping($row, array(), MigrateIdMapInterface::STATUS_FAILED);
+          $this->migration->getIdMap()->saveIdMapping($row, [], MigrateIdMapInterface::STATUS_FAILED);
           $this->handleException($e);
         }
       }
@@ -268,7 +268,7 @@ public function import() {
       catch (\Exception $e) {
         $this->message->display(
           $this->t('Migration failed with source plugin exception: @e',
-            array('@e' => $e->getMessage())), 'error');
+            ['@e' => $e->getMessage()]), 'error');
         $this->migration->setStatus(MigrationInterface::STATUS_IDLE);
         return MigrationInterface::RESULT_FAILED;
       }
@@ -356,7 +356,7 @@ public function processRow(Row $row, array $process = NULL, $value = NULL) {
         // plugin) and in this case the current value needs to be iterated
         // and each scalar separately transformed.
         if ($multiple && !$definition['handle_multiples']) {
-          $new_value = array();
+          $new_value = [];
           if (!is_array($value)) {
             throw new MigrateException(sprintf('Pipeline failed for destination %s: %s got instead of an array,', $destination, $value));
           }
@@ -460,11 +460,11 @@ protected function memoryExceeded() {
       $this->message->display(
         $this->t(
           'Memory usage is @usage (@pct% of limit @limit), reclaiming memory.',
-          array(
+          [
             '@pct' => round($pct_memory * 100),
             '@usage' => $this->formatSize($usage),
             '@limit' => $this->formatSize($this->memoryLimit),
-          )
+          ]
         ),
         'warning'
       );
@@ -476,11 +476,11 @@ protected function memoryExceeded() {
         $this->message->display(
           $this->t(
             'Memory usage is now @usage (@pct% of limit @limit), not enough reclaimed, starting new batch',
-            array(
+            [
               '@pct' => round($pct_memory * 100),
               '@usage' => $this->formatSize($usage),
               '@limit' => $this->formatSize($this->memoryLimit),
-            )
+            ]
           ),
           'warning'
         );
@@ -490,11 +490,11 @@ protected function memoryExceeded() {
         $this->message->display(
           $this->t(
             'Memory usage is now @usage (@pct% of limit @limit), reclaimed enough, continuing',
-            array(
+            [
               '@pct' => round($pct_memory * 100),
               '@usage' => $this->formatSize($usage),
               '@limit' => $this->formatSize($this->memoryLimit),
-            )
+            ]
           ),
           'warning');
         return FALSE;
diff --git a/core/modules/migrate/src/MigrateMessage.php b/core/modules/migrate/src/MigrateMessage.php
index b3c7634b72b447de16838ac4a86940f52252eb31..4cc166c81c55363142b5d2f1f0bcb97ade4735db 100644
--- a/core/modules/migrate/src/MigrateMessage.php
+++ b/core/modules/migrate/src/MigrateMessage.php
@@ -14,10 +14,10 @@ class MigrateMessage implements MigrateMessageInterface {
    *
    * @var array
    */
-  protected $map = array(
+  protected $map = [
     'status' => RfcLogLevel::INFO,
     'error' => RfcLogLevel::ERROR,
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/migrate/src/Plugin/Derivative/MigrateEntity.php b/core/modules/migrate/src/Plugin/Derivative/MigrateEntity.php
index ef7c0b63e74dc52a2ff5e2cb77aa9327e8a6b8be..0babe2fc743290afbdf818564dbe89bd6946dcde 100644
--- a/core/modules/migrate/src/Plugin/Derivative/MigrateEntity.php
+++ b/core/modules/migrate/src/Plugin/Derivative/MigrateEntity.php
@@ -12,7 +12,7 @@ class MigrateEntity implements ContainerDeriverInterface {
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * The entity definitions
@@ -59,12 +59,12 @@ public function getDerivativeDefinitions($base_plugin_definition) {
       $class = is_subclass_of($entity_info->getClass(), 'Drupal\Core\Config\Entity\ConfigEntityInterface') ?
         'Drupal\migrate\Plugin\migrate\destination\EntityConfigBase' :
         'Drupal\migrate\Plugin\migrate\destination\EntityContentBase';
-      $this->derivatives[$entity_type] = array(
+      $this->derivatives[$entity_type] = [
         'id' => "entity:$entity_type",
         'class' => $class,
         'requirements_met' => 1,
         'provider' => $entity_info->getProvider(),
-      );
+      ];
     }
     return $this->derivatives;
   }
diff --git a/core/modules/migrate/src/Plugin/Derivative/MigrateEntityRevision.php b/core/modules/migrate/src/Plugin/Derivative/MigrateEntityRevision.php
index 2925bd4296ff24c6e534b3b5ffd3438b87f3c193..cee3b3985ed0b07ee93a904bc97789d7b70954df 100644
--- a/core/modules/migrate/src/Plugin/Derivative/MigrateEntityRevision.php
+++ b/core/modules/migrate/src/Plugin/Derivative/MigrateEntityRevision.php
@@ -12,7 +12,7 @@ class MigrateEntityRevision implements ContainerDeriverInterface {
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * The entity definitions
@@ -57,12 +57,12 @@ public function getDerivativeDefinition($derivative_id, $base_plugin_definition)
   public function getDerivativeDefinitions($base_plugin_definition) {
     foreach ($this->entityDefinitions as $entity_type => $entity_info) {
       if ($entity_info->getKey('revision')) {
-        $this->derivatives[$entity_type] = array(
+        $this->derivatives[$entity_type] = [
           'id' => "entity_revision:$entity_type",
           'class' => 'Drupal\migrate\Plugin\migrate\destination\EntityRevision',
           'requirements_met' => 1,
           'provider' => $entity_info->getProvider(),
-        );
+        ];
       }
     }
     return $this->derivatives;
diff --git a/core/modules/migrate/src/Plugin/Discovery/AnnotatedClassDiscoveryAutomatedProviders.php b/core/modules/migrate/src/Plugin/Discovery/AnnotatedClassDiscoveryAutomatedProviders.php
index c102bb890eff926b2d0980023a637dec8dc48089..180be0a3aae5024f96b6296183ba0f5ce52460a1 100644
--- a/core/modules/migrate/src/Plugin/Discovery/AnnotatedClassDiscoveryAutomatedProviders.php
+++ b/core/modules/migrate/src/Plugin/Discovery/AnnotatedClassDiscoveryAutomatedProviders.php
@@ -73,7 +73,7 @@ protected function prepareAnnotationDefinition(AnnotationInterface $annotation,
    * {@inheritdoc}
    */
   public function getDefinitions() {
-    $definitions = array();
+    $definitions = [];
 
     $reader = $this->getAnnotationReader();
 
diff --git a/core/modules/migrate/src/Plugin/MigrateDestinationInterface.php b/core/modules/migrate/src/Plugin/MigrateDestinationInterface.php
index 9c83baf295c6a3abea9dde894f52d321dbab8d06..866e80cbe05345c415a9792e9d8ee3b73c595f6e 100644
--- a/core/modules/migrate/src/Plugin/MigrateDestinationInterface.php
+++ b/core/modules/migrate/src/Plugin/MigrateDestinationInterface.php
@@ -106,7 +106,7 @@ public function fields(MigrationInterface $migration = NULL);
    * @return mixed
    *   The entity ID or an indication of success.
    */
-  public function import(Row $row, array $old_destination_id_values = array());
+  public function import(Row $row, array $old_destination_id_values = []);
 
   /**
    * Delete the specified destination object from the target Drupal.
diff --git a/core/modules/migrate/src/Plugin/MigrateDestinationPluginManager.php b/core/modules/migrate/src/Plugin/MigrateDestinationPluginManager.php
index 74100cf4f23eb7acd1289171ba13b094d39fd26f..090efd042a2205fe9c4835903cea99a2bfdc847e 100644
--- a/core/modules/migrate/src/Plugin/MigrateDestinationPluginManager.php
+++ b/core/modules/migrate/src/Plugin/MigrateDestinationPluginManager.php
@@ -54,7 +54,7 @@ public function __construct($type, \Traversable $namespaces, CacheBackendInterfa
    *
    * A specific createInstance method is necessary to pass the migration on.
    */
-  public function createInstance($plugin_id, array $configuration = array(), MigrationInterface $migration = NULL) {
+  public function createInstance($plugin_id, array $configuration = [], MigrationInterface $migration = NULL) {
     if (substr($plugin_id, 0, 7) == 'entity:' && !$this->entityManager->getDefinition(substr($plugin_id, 7), FALSE)) {
       $plugin_id = 'null';
     }
diff --git a/core/modules/migrate/src/Plugin/MigratePluginManager.php b/core/modules/migrate/src/Plugin/MigratePluginManager.php
index 94c59859e627bf0a0900f2819df4230f68f01354..b3645dbdd0e41c3bbf3419dfb33bea71bdf8fc7c 100644
--- a/core/modules/migrate/src/Plugin/MigratePluginManager.php
+++ b/core/modules/migrate/src/Plugin/MigratePluginManager.php
@@ -49,7 +49,7 @@ public function __construct($type, \Traversable $namespaces, CacheBackendInterfa
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array(), MigrationInterface $migration = NULL) {
+  public function createInstance($plugin_id, array $configuration = [], MigrationInterface $migration = NULL) {
     $plugin_definition = $this->getDefinition($plugin_id);
     $plugin_class = DefaultFactory::getPluginClass($plugin_id, $plugin_definition);
     // If the plugin provides a factory method, pass the container to it.
diff --git a/core/modules/migrate/src/Plugin/Migration.php b/core/modules/migrate/src/Plugin/Migration.php
index be79d0df3b5c35bc00160d7431df6b0bd847fe1a..13092e777585addbc61d68433d40a1eb0c281265 100644
--- a/core/modules/migrate/src/Plugin/Migration.php
+++ b/core/modules/migrate/src/Plugin/Migration.php
@@ -346,9 +346,9 @@ public function getProcessPlugins(array $process = NULL) {
     }
     $index = serialize($process);
     if (!isset($this->processPlugins[$index])) {
-      $this->processPlugins[$index] = array();
+      $this->processPlugins[$index] = [];
       foreach ($this->getProcessNormalized($process) as $property => $configurations) {
-        $this->processPlugins[$index][$property] = array();
+        $this->processPlugins[$index][$property] = [];
         foreach ($configurations as $configuration) {
           if (isset($configuration['source'])) {
             $this->processPlugins[$index][$property][] = $this->processPluginManager->createInstance('get', $configuration, $this);
@@ -376,16 +376,16 @@ public function getProcessPlugins(array $process = NULL) {
    *   The normalized process configuration.
    */
   protected function getProcessNormalized(array $process) {
-    $normalized_configurations = array();
+    $normalized_configurations = [];
     foreach ($process as $destination => $configuration) {
       if (is_string($configuration)) {
-        $configuration = array(
+        $configuration = [
           'plugin' => 'get',
           'source' => $configuration,
-        );
+        ];
       }
       if (isset($configuration['plugin'])) {
-        $configuration = array($configuration);
+        $configuration = [$configuration];
       }
       $normalized_configurations[$destination] = $configuration;
     }
diff --git a/core/modules/migrate/src/Plugin/MigrationPluginManager.php b/core/modules/migrate/src/Plugin/MigrationPluginManager.php
index 3ea5727d025f49eec18d17a6fd1643f2143354d9..f3b75bc89cb49986ed081eea054580fc14aef0e6 100644
--- a/core/modules/migrate/src/Plugin/MigrationPluginManager.php
+++ b/core/modules/migrate/src/Plugin/MigrationPluginManager.php
@@ -24,9 +24,9 @@ class MigrationPluginManager extends DefaultPluginManager implements MigrationPl
    *
    * @var array
    */
-  protected $defaults = array(
+  protected $defaults = [
     'class' => '\Drupal\migrate\Plugin\Migration',
-  );
+  ];
 
   /**
    * The interface the plugins should implement.
@@ -55,7 +55,7 @@ class MigrationPluginManager extends DefaultPluginManager implements MigrationPl
   public function __construct(ModuleHandlerInterface $module_handler, CacheBackendInterface $cache_backend, LanguageManagerInterface $language_manager) {
     $this->factory = new ContainerFactory($this, $this->pluginInterface);
     $this->alterInfo('migration_plugins');
-    $this->setCacheBackend($cache_backend, 'migration_plugins', array('migration_plugins'));
+    $this->setCacheBackend($cache_backend, 'migration_plugins', ['migration_plugins']);
     $this->moduleHandler = $module_handler;
   }
 
@@ -85,7 +85,7 @@ protected function getDiscovery() {
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $instances = $this->createInstances([$plugin_id], [$plugin_id => $configuration]);
     return reset($instances);
   }
@@ -93,7 +93,7 @@ public function createInstance($plugin_id, array $configuration = array()) {
   /**
    * {@inheritdoc}
    */
-  public function createInstances($migration_id, array $configuration = array()) {
+  public function createInstances($migration_id, array $configuration = []) {
     if (empty($migration_id)) {
       $migration_id = array_keys($this->getDefinitions());
     }
@@ -222,9 +222,9 @@ public function buildDependencyMigration(array $migrations, array $dynamic_ids)
    *   The dynamic ID mapping.
    */
   protected function addDependency(array &$graph, $id, $dependency, $dynamic_ids) {
-    $dependencies = isset($dynamic_ids[$dependency]) ? $dynamic_ids[$dependency] : array($dependency);
+    $dependencies = isset($dynamic_ids[$dependency]) ? $dynamic_ids[$dependency] : [$dependency];
     if (!isset($graph[$id]['edges'])) {
-      $graph[$id]['edges'] = array();
+      $graph[$id]['edges'] = [];
     }
     $graph[$id]['edges'] += array_combine($dependencies, $dependencies);
   }
diff --git a/core/modules/migrate/src/Plugin/MigrationPluginManagerInterface.php b/core/modules/migrate/src/Plugin/MigrationPluginManagerInterface.php
index 0f97768229e49aa81551da3e15f3da4cab5e5b74..a0f648862ddc814a81fb41eb93184921a203b83c 100644
--- a/core/modules/migrate/src/Plugin/MigrationPluginManagerInterface.php
+++ b/core/modules/migrate/src/Plugin/MigrationPluginManagerInterface.php
@@ -26,7 +26,7 @@ interface MigrationPluginManagerInterface extends PluginManagerInterface {
    * @throws \Drupal\Component\Plugin\Exception\PluginException
    *   If an instance cannot be created, such as if the ID is invalid.
    */
-  public function createInstances($id, array $configuration = array());
+  public function createInstances($id, array $configuration = []);
 
   /**
    * Creates a stub migration plugin from a definition array.
diff --git a/core/modules/migrate/src/Plugin/migrate/destination/ComponentEntityDisplayBase.php b/core/modules/migrate/src/Plugin/migrate/destination/ComponentEntityDisplayBase.php
index a3b174a9d004fbeeb97c33c7570d7672f3783dd0..660248494e110a1327ee08b5d5345ed18cb9021b 100644
--- a/core/modules/migrate/src/Plugin/migrate/destination/ComponentEntityDisplayBase.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/ComponentEntityDisplayBase.php
@@ -15,8 +15,8 @@ abstract class ComponentEntityDisplayBase extends DestinationBase {
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
-    $values = array();
+  public function import(Row $row, array $old_destination_id_values = []) {
+    $values = [];
     // array_intersect_key() won't work because the order is important because
     // this is also the return value.
     foreach (array_keys($this->getIds()) as $id) {
@@ -24,7 +24,7 @@ public function import(Row $row, array $old_destination_id_values = array()) {
     }
     $entity = $this->getEntity($values['entity_type'], $values['bundle'], $values[static::MODE_NAME]);
     if (!$row->getDestinationProperty('hidden')) {
-      $entity->setComponent($values['field_name'], $row->getDestinationProperty('options') ?: array());
+      $entity->setComponent($values['field_name'], $row->getDestinationProperty('options') ?: []);
     }
     else {
       $entity->removeComponent($values['field_name']);
diff --git a/core/modules/migrate/src/Plugin/migrate/destination/Config.php b/core/modules/migrate/src/Plugin/migrate/destination/Config.php
index 422037be5e2f9d03f744971070d081be8ea48a42..cb1c1c0579c1d4644df1137f24125ee0d498b89d 100644
--- a/core/modules/migrate/src/Plugin/migrate/destination/Config.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/Config.php
@@ -83,7 +83,7 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     if ($this->isTranslationDestination()) {
       $this->config = $this->language_manager->getLanguageConfigOverride($row->getDestinationProperty('langcode'), $this->config->getName());
     }
diff --git a/core/modules/migrate/src/Plugin/migrate/destination/EntityConfigBase.php b/core/modules/migrate/src/Plugin/migrate/destination/EntityConfigBase.php
index f59b8c7be0fa33d6d785cd6f5b75b2a007e52146..2829032cbfce22635e54f2b1d373006ef08ba833 100644
--- a/core/modules/migrate/src/Plugin/migrate/destination/EntityConfigBase.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/EntityConfigBase.php
@@ -86,7 +86,7 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     if ($row->isStub()) {
       throw new MigrateException('Config entities can not be stubbed.');
     }
@@ -214,7 +214,7 @@ protected function updateEntityProperty(EntityInterface $entity, array $parents,
    *   The generated entity ID.
    */
   protected function generateId(Row $row, array $ids) {
-    $id_values = array();
+    $id_values = [];
     foreach ($ids as $id) {
       if ($this->isTranslationDestination() && $id == 'langcode') {
         continue;
@@ -230,7 +230,7 @@ protected function generateId(Row $row, array $ids) {
   public function rollback(array $destination_identifier) {
     if ($this->isTranslationDestination()) {
       // The entity id does not include the langcode.
-      $id_values = array();
+      $id_values = [];
       foreach ($destination_identifier as $key => $value) {
         if ($this->isTranslationDestination() && $key == 'langcode') {
           continue;
@@ -247,7 +247,7 @@ public function rollback(array $destination_identifier) {
     }
     else {
       $destination_identifier = implode('.', $destination_identifier);
-      parent::rollback(array($destination_identifier));
+      parent::rollback([$destination_identifier]);
     }
   }
 
diff --git a/core/modules/migrate/src/Plugin/migrate/destination/EntityContentBase.php b/core/modules/migrate/src/Plugin/migrate/destination/EntityContentBase.php
index 9da3de6f9057a0d582686b5bf82beb85fdc67874..d4f9bd72ecc5dff1d86ccefeb1160f8a7481241e 100644
--- a/core/modules/migrate/src/Plugin/migrate/destination/EntityContentBase.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/EntityContentBase.php
@@ -80,7 +80,7 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     $this->rollbackAction = MigrateIdMapInterface::ROLLBACK_DELETE;
     $entity = $this->getEntity($row, $old_destination_id_values);
     if (!$entity) {
@@ -105,9 +105,9 @@ public function import(Row $row, array $old_destination_id_values = array()) {
    * @return array
    *   An array containing the entity ID.
    */
-  protected function save(ContentEntityInterface $entity, array $old_destination_id_values = array()) {
+  protected function save(ContentEntityInterface $entity, array $old_destination_id_values = []) {
     $entity->save();
-    return array($entity->id());
+    return [$entity->id()];
   }
 
   /**
diff --git a/core/modules/migrate/src/Plugin/migrate/destination/EntityFieldStorageConfig.php b/core/modules/migrate/src/Plugin/migrate/destination/EntityFieldStorageConfig.php
index 7ad01045a61d4850449158a27e34f8d39f95e2c8..9b781a3f9ab87b300b4742b32b690520032387fe 100644
--- a/core/modules/migrate/src/Plugin/migrate/destination/EntityFieldStorageConfig.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/EntityFieldStorageConfig.php
@@ -25,7 +25,7 @@ public function getIds() {
    */
   public function rollback(array $destination_identifier) {
     $destination_identifier = implode('.', $destination_identifier);
-    parent::rollback(array($destination_identifier));
+    parent::rollback([$destination_identifier]);
   }
 
 }
diff --git a/core/modules/migrate/src/Plugin/migrate/destination/EntityRevision.php b/core/modules/migrate/src/Plugin/migrate/destination/EntityRevision.php
index 381974291eeb6e833eb41f39569888d8de7af331..b0db4769877cad453b186f5ffa6bfc5a4d0f5927 100644
--- a/core/modules/migrate/src/Plugin/migrate/destination/EntityRevision.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/EntityRevision.php
@@ -63,9 +63,9 @@ protected function getEntity(Row $row, array $old_destination_id_values) {
   /**
    * {@inheritdoc}
    */
-  protected function save(ContentEntityInterface $entity, array $old_destination_id_values = array()) {
+  protected function save(ContentEntityInterface $entity, array $old_destination_id_values = []) {
     $entity->save();
-    return array($entity->getRevisionId());
+    return [$entity->getRevisionId()];
   }
 
   /**
diff --git a/core/modules/migrate/src/Plugin/migrate/destination/EntityViewMode.php b/core/modules/migrate/src/Plugin/migrate/destination/EntityViewMode.php
index fad171b5904b825f2ea268d24f7c101034586939..d7c2e80e1363f89f2445bf5e9b7e646d9cd60520 100644
--- a/core/modules/migrate/src/Plugin/migrate/destination/EntityViewMode.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/EntityViewMode.php
@@ -25,7 +25,7 @@ public function getIds() {
    */
   public function rollback(array $destination_identifier) {
     $destination_identifier = implode('.', $destination_identifier);
-    parent::rollback(array($destination_identifier));
+    parent::rollback([$destination_identifier]);
   }
 
 }
diff --git a/core/modules/migrate/src/Plugin/migrate/destination/NullDestination.php b/core/modules/migrate/src/Plugin/migrate/destination/NullDestination.php
index 878a1838be12c1e76da9f0da82ce988926f14b17..cfe47eada8b6b294f1eca50b7b02f007134f688b 100644
--- a/core/modules/migrate/src/Plugin/migrate/destination/NullDestination.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/NullDestination.php
@@ -19,20 +19,20 @@ class NullDestination extends DestinationBase {
    * {@inheritdoc}
    */
   public function getIds() {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function fields(MigrationInterface $migration = NULL) {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
   }
 
 }
diff --git a/core/modules/migrate/src/Plugin/migrate/id_map/Sql.php b/core/modules/migrate/src/Plugin/migrate/id_map/Sql.php
index 1ff5ee4c176e89315cca7e189fe4e871fc11985f..14a0a7abe5a699074170904ee7349a14afe82d5d 100644
--- a/core/modules/migrate/src/Plugin/migrate/id_map/Sql.php
+++ b/core/modules/migrate/src/Plugin/migrate/id_map/Sql.php
@@ -115,14 +115,14 @@ class Sql extends PluginBase implements MigrateIdMapInterface, ContainerFactoryP
    *
    * @var array
    */
-  protected $sourceIds = array();
+  protected $sourceIds = [];
 
   /**
    * The destination identifiers.
    *
    * @var array
    */
-  protected $destinationIds = array();
+  protected $destinationIds = [];
 
   /**
    * The current row.
@@ -136,7 +136,7 @@ class Sql extends PluginBase implements MigrateIdMapInterface, ContainerFactoryP
    *
    * @var array
    */
-  protected $currentKey = array();
+  protected $currentKey = [];
 
   /**
    * Constructs an SQL object.
@@ -208,7 +208,7 @@ public function getSourceIDsHash(array $source_id_values) {
   protected function sourceIdFields() {
     if (!isset($this->sourceIdFields)) {
       // Build the source and destination identifier maps.
-      $this->sourceIdFields = array();
+      $this->sourceIdFields = [];
       $count = 1;
       foreach ($this->migration->getSourcePlugin()->getIds() as $field => $schema) {
         $this->sourceIdFields[$field] = 'sourceid' . $count++;
@@ -225,7 +225,7 @@ protected function sourceIdFields() {
    */
   protected function destinationIdFields() {
     if (!isset($this->destinationIdFields)) {
-      $this->destinationIdFields = array();
+      $this->destinationIdFields = [];
       $count = 1;
       foreach ($this->migration->getDestinationPlugin()->getIds() as $field => $schema) {
         $this->destinationIdFields[$field] = 'destid' . $count++;
@@ -312,7 +312,7 @@ protected function ensureTables() {
       // Generate appropriate schema info for the map and message tables,
       // and map from the source field names to the map/msg field names.
       $count = 1;
-      $source_id_schema = array();
+      $source_id_schema = [];
       $indexes = [];
       foreach ($this->migration->getSourcePlugin()->getIds() as $id_definition) {
         $mapkey = 'sourceid' . $count++;
@@ -321,12 +321,12 @@ protected function ensureTables() {
         $source_id_schema[$mapkey]['not null'] = TRUE;
       }
 
-      $source_ids_hash[static::SOURCE_IDS_HASH] = array(
+      $source_ids_hash[static::SOURCE_IDS_HASH] = [
         'type' => 'varchar',
         'length' => '64',
         'not null' => TRUE,
         'description' => 'Hash of source ids. Used as primary key',
-      );
+      ];
       $fields = $source_ids_hash + $source_id_schema;
 
       // Add destination identifiers to map table.
@@ -338,69 +338,69 @@ protected function ensureTables() {
         $fields[$mapkey] = $this->getFieldSchema($id_definition);
         $fields[$mapkey]['not null'] = FALSE;
       }
-      $fields['source_row_status'] = array(
+      $fields['source_row_status'] = [
         'type' => 'int',
         'size' => 'tiny',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => MigrateIdMapInterface::STATUS_IMPORTED,
         'description' => 'Indicates current status of the source row',
-      );
-      $fields['rollback_action'] = array(
+      ];
+      $fields['rollback_action'] = [
         'type' => 'int',
         'size' => 'tiny',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => MigrateIdMapInterface::ROLLBACK_DELETE,
         'description' => 'Flag indicating what to do for this item on rollback',
-      );
-      $fields['last_imported'] = array(
+      ];
+      $fields['last_imported'] = [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'UNIX timestamp of the last time this row was imported',
-      );
-      $fields['hash'] = array(
+      ];
+      $fields['hash'] = [
         'type' => 'varchar',
         'length' => '64',
         'not null' => FALSE,
         'description' => 'Hash of source row data, for detecting changes',
-      );
-      $schema = array(
+      ];
+      $schema = [
         'description' => 'Mappings from source identifier value(s) to destination identifier value(s).',
         'fields' => $fields,
-        'primary key' => array(static::SOURCE_IDS_HASH),
+        'primary key' => [static::SOURCE_IDS_HASH],
         'indexes' => $indexes,
-      );
+      ];
       $this->getDatabase()->schema()->createTable($this->mapTableName, $schema);
 
       // Now do the message table.
       if (!$this->getDatabase()->schema()->tableExists($this->messageTableName())) {
-        $fields = array();
-        $fields['msgid'] = array(
+        $fields = [];
+        $fields['msgid'] = [
           'type' => 'serial',
           'unsigned' => TRUE,
           'not null' => TRUE,
-        );
+        ];
         $fields += $source_ids_hash;
 
-        $fields['level'] = array(
+        $fields['level'] = [
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 1,
-        );
-        $fields['message'] = array(
+        ];
+        $fields['message'] = [
           'type' => 'text',
           'size' => 'medium',
           'not null' => TRUE,
-        );
-        $schema = array(
+        ];
+        $schema = [
           'description' => 'Messages generated during a migration process',
           'fields' => $fields,
-          'primary key' => array('msgid'),
-        );
+          'primary key' => ['msgid'],
+        ];
         $this->getDatabase()->schema()->createTable($this->messageTableName(), $schema);
       }
     }
@@ -409,33 +409,33 @@ protected function ensureTables() {
       if (!$this->getDatabase()->schema()->fieldExists($this->mapTableName,
                                                     'rollback_action')) {
         $this->getDatabase()->schema()->addField($this->mapTableName, 'rollback_action',
-          array(
+          [
             'type' => 'int',
             'size' => 'tiny',
             'unsigned' => TRUE,
             'not null' => TRUE,
             'default' => 0,
             'description' => 'Flag indicating what to do for this item on rollback',
-          )
+          ]
         );
       }
       if (!$this->getDatabase()->schema()->fieldExists($this->mapTableName, 'hash')) {
         $this->getDatabase()->schema()->addField($this->mapTableName, 'hash',
-          array(
+          [
             'type' => 'varchar',
             'length' => '64',
             'not null' => FALSE,
             'description' => 'Hash of source row data, for detecting changes',
-          )
+          ]
         );
       }
       if (!$this->getDatabase()->schema()->fieldExists($this->mapTableName, static::SOURCE_IDS_HASH)) {
-        $this->getDatabase()->schema()->addField($this->mapTableName, static::SOURCE_IDS_HASH, array(
+        $this->getDatabase()->schema()->addField($this->mapTableName, static::SOURCE_IDS_HASH, [
           'type' => 'varchar',
           'length' => '64',
           'not null' => TRUE,
           'description' => 'Hash of source ids. Used as primary key',
-        ));
+        ]);
       }
     }
   }
@@ -508,7 +508,7 @@ public function getRowByDestination(array $destination_id_values) {
    * {@inheritdoc}
    */
   public function getRowsNeedingUpdate($count) {
-    $rows = array();
+    $rows = [];
     $result = $this->getDatabase()->select($this->mapTableName(), 'map')
       ->fields('map')
       ->condition('source_row_status', MigrateIdMapInterface::STATUS_NEEDS_UPDATE)
@@ -541,7 +541,7 @@ public function lookupSourceID(array $destination_id_values) {
    */
   public function lookupDestinationId(array $source_id_values) {
     $results = $this->lookupDestinationIds($source_id_values);
-    return $results ? reset($results) : array();
+    return $results ? reset($results) : [];
   }
 
   /**
@@ -549,7 +549,7 @@ public function lookupDestinationId(array $source_id_values) {
    */
   public function lookupDestinationIds(array $source_id_values) {
     if (empty($source_id_values)) {
-      return array();
+      return [];
     }
 
     // Canonicalize the keys into a hash of DB-field => value.
@@ -605,7 +605,7 @@ public function saveIdMapping(Row $row, array $destination_id_values, $source_ro
       if (!isset($source_id_values[$field_name])) {
         $this->message->display($this->t(
           'Did not save to map table due to NULL value for key field @field',
-          array('@field' => $field_name)), 'error');
+          ['@field' => $field_name]), 'error');
         return;
       }
       $fields[$key_name] = $source_id_values[$field_name];
@@ -615,11 +615,11 @@ public function saveIdMapping(Row $row, array $destination_id_values, $source_ro
       return;
     }
 
-    $fields += array(
+    $fields += [
       'source_row_status' => (int) $source_row_status,
       'rollback_action' => (int) $rollback_action,
       'hash' => $row->getHash(),
-    );
+    ];
     $count = 0;
     foreach ($destination_id_values as $dest_id) {
       $fields['destid' . ++$count] = $dest_id;
@@ -683,7 +683,7 @@ public function getMessageIterator(array $source_id_values = [], $level = NULL)
    */
   public function prepareUpdate() {
     $this->getDatabase()->update($this->mapTableName())
-      ->fields(array('source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE))
+      ->fields(['source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE])
       ->execute();
   }
 
@@ -702,7 +702,7 @@ public function processedCount() {
    */
   public function importedCount() {
     return $this->getDatabase()->select($this->mapTableName())
-      ->condition('source_row_status', array(MigrateIdMapInterface::STATUS_IMPORTED, MigrateIdMapInterface::STATUS_NEEDS_UPDATE), 'IN')
+      ->condition('source_row_status', [MigrateIdMapInterface::STATUS_IMPORTED, MigrateIdMapInterface::STATUS_NEEDS_UPDATE], 'IN')
       ->countQuery()
       ->execute()
       ->fetchField();
@@ -797,7 +797,7 @@ public function setUpdate(array $source_id_values) {
     }
     $query = $this->getDatabase()
       ->update($this->mapTableName())
-      ->fields(array('source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE));
+      ->fields(['source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE]);
 
     foreach ($this->sourceIdFields() as $field_name => $source_id) {
       $query->condition($source_id, $source_id_values[$field_name]);
@@ -827,7 +827,7 @@ public function destroy() {
    */
   public function rewind() {
     $this->currentRow = NULL;
-    $fields = array();
+    $fields = [];
     foreach ($this->sourceIdFields() as $field) {
       $fields[] = $field;
     }
@@ -866,7 +866,7 @@ public function key() {
    */
   public function currentDestination() {
     if ($this->valid()) {
-      $result = array();
+      $result = [];
       foreach ($this->destinationIdFields() as $destination_field_name => $idmap_field_name) {
         if (!is_null($this->currentRow[$idmap_field_name])) {
           $result[$destination_field_name] = $this->currentRow[$idmap_field_name];
@@ -884,7 +884,7 @@ public function currentDestination() {
    */
   public function currentSource() {
     if ($this->valid()) {
-      $result = array();
+      $result = [];
       foreach ($this->sourceIdFields() as $field_name => $source_id) {
         $result[$field_name] = $this->currentKey[$source_id];
       }
@@ -903,7 +903,7 @@ public function currentSource() {
    */
   public function next() {
     $this->currentRow = $this->result->fetchAssoc();
-    $this->currentKey = array();
+    $this->currentKey = [];
     if ($this->currentRow) {
       foreach ($this->sourceIdFields() as $map_field) {
         $this->currentKey[$map_field] = $this->currentRow[$map_field];
diff --git a/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php b/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
index 58aa463500ed58f2b2129611f3927977132ea761..f24131244f9735aa7984b9d98c417c33a2519faa 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
@@ -89,11 +89,11 @@ class FileCopy extends ProcessPluginBase implements ContainerFactoryPluginInterf
    *   An instance of the download plugin for handling remote URIs.
    */
   public function __construct(array $configuration, $plugin_id, array $plugin_definition, StreamWrapperManagerInterface $stream_wrappers, FileSystemInterface $file_system, MigrateProcessInterface $download_plugin) {
-    $configuration += array(
+    $configuration += [
       'move' => FALSE,
       'rename' => FALSE,
       'reuse' => FALSE,
-    );
+    ];
     parent::__construct($configuration, $plugin_id, $plugin_definition);
     $this->streamWrapperManager = $stream_wrappers;
     $this->fileSystem = $file_system;
diff --git a/core/modules/migrate/src/Plugin/migrate/process/Get.php b/core/modules/migrate/src/Plugin/migrate/process/Get.php
index f6b3c34e8595c68eb785f4499a3c077fff8c5824..21f42652db4f5811210ac6d17bf3778e7cf3f00e 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/Get.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/Get.php
@@ -29,8 +29,8 @@ class Get extends ProcessPluginBase {
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     $source = $this->configuration['source'];
-    $properties = is_string($source) ? array($source) : $source;
-    $return = array();
+    $properties = is_string($source) ? [$source] : $source;
+    $return = [];
     foreach ($properties as $property) {
       if ($property || (string) $property === '0') {
         $is_source = TRUE;
diff --git a/core/modules/migrate/src/Plugin/migrate/process/Iterator.php b/core/modules/migrate/src/Plugin/migrate/process/Iterator.php
index 2a41c4a9a8abab53bd382488f930fe8e0c1f31e4..d85abfdb3b8ded1e09fc4d61bd0c2e0ca0987b2e 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/Iterator.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/Iterator.php
@@ -51,7 +51,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
    *   The transformed key.
    */
   protected function transformKey($key, MigrateExecutableInterface $migrate_executable, Row $row) {
-    $process = array('key' => $this->configuration['key']);
+    $process = ['key' => $this->configuration['key']];
     $migrate_executable->processRow($row, $process, $key);
     return $row->getDestinationProperty('key');
   }
diff --git a/core/modules/migrate/src/Plugin/migrate/process/Migration.php b/core/modules/migrate/src/Plugin/migrate/process/Migration.php
index 8520a5ec3d0778e0165c32a82e0304452aa2d91e..e07505ff597a18db573de7bd4374a1ab20ed4bb9 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/Migration.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/Migration.php
@@ -75,23 +75,23 @@ public static function create(ContainerInterface $container, array $configuratio
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     $migration_ids = $this->configuration['migration'];
     if (!is_array($migration_ids)) {
-      $migration_ids = array($migration_ids);
+      $migration_ids = [$migration_ids];
     }
     if (!is_array($value)) {
-      $value = array($value);
+      $value = [$value];
     }
     $this->skipOnEmpty($value);
     $self = FALSE;
     /** @var \Drupal\migrate\Plugin\MigrationInterface[] $migrations */
     $destination_ids = NULL;
-    $source_id_values = array();
+    $source_id_values = [];
     $migrations = $this->migrationPluginManager->createInstances($migration_ids);
     foreach ($migrations as $migration_id => $migration) {
       if ($migration_id == $this->migration->id()) {
         $self = TRUE;
       }
       if (isset($this->configuration['source_ids'][$migration_id])) {
-        $configuration = array('source' => $this->configuration['source_ids'][$migration_id]);
+        $configuration = ['source' => $this->configuration['source_ids'][$migration_id]];
         $source_id_values[$migration_id] = $this->processPluginManager
           ->createInstance('get', $configuration, $this->migration)
           ->transform(NULL, $migrate_executable, $row, $destination_property);
@@ -128,7 +128,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
       // We already have the source ID values but need to key them for the Row
       // constructor.
       $source_ids = $migration->getSourcePlugin()->getIds();
-      $values = array();
+      $values = [];
       foreach (array_keys($source_ids) as $index => $source_id) {
         $values[$source_id] = $source_id_values[$migration->id()][$index];
       }
@@ -137,7 +137,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
 
       // Do a normal migration with the stub row.
       $migrate_executable->processRow($stub_row, $process);
-      $destination_ids = array();
+      $destination_ids = [];
       try {
         $destination_ids = $destination_plugin->import($stub_row);
       }
diff --git a/core/modules/migrate/src/Plugin/migrate/process/Route.php b/core/modules/migrate/src/Plugin/migrate/process/Route.php
index 7ff4720488adcb57b416837be7dd664757c11835..515db978a4d59428add586e088f6b7fcb0e5ea19 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/Route.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/Route.php
@@ -64,12 +64,12 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
     }
 
     $extracted = $this->pathValidator->getUrlIfValidWithoutAccessCheck($link_path);
-    $route = array();
+    $route = [];
 
     if ($extracted) {
       if ($extracted->isExternal()) {
         $route['route_name'] = NULL;
-        $route['route_parameters'] = array();
+        $route['route_parameters'] = [];
         $route['options'] = $options;
         $route['url'] = $extracted->getUri();
       }
diff --git a/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php b/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
index 769da3b7eb24ecb52c23446ab4272a632be93c9e..d3c93ed5944f4ea2802cf8b869b752c949d5953e 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
@@ -31,7 +31,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
       }
     }
     else {
-      $new_value = array($value);
+      $new_value = [$value];
     }
     $new_value = NestedArray::getValue($this->configuration['map'], $new_value, $key_exists);
     if (!$key_exists) {
diff --git a/core/modules/migrate/src/Plugin/migrate/process/UrlEncode.php b/core/modules/migrate/src/Plugin/migrate/process/UrlEncode.php
index eab6918f481e12bda577a4e1d08fd908863615ad..4e385602f46a6c11a54e2c4a845c9dcf364fb25c 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/UrlEncode.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/UrlEncode.php
@@ -44,7 +44,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
         throw new MigrateException("Value '$value' is not a valid URL");
       }
       // Iterate over specific pieces of the URL rawurlencoding each one.
-      $url_parts_to_encode = array('path', 'query', 'fragment');
+      $url_parts_to_encode = ['path', 'query', 'fragment'];
       foreach ($parsed_url as $parsed_url_key => $parsed_url_value) {
         if (in_array($parsed_url_key, $url_parts_to_encode)) {
           // urlencode() would convert spaces to + signs.
diff --git a/core/modules/migrate/src/Plugin/migrate/source/EmptySource.php b/core/modules/migrate/src/Plugin/migrate/source/EmptySource.php
index 64b3201bbe82d9f955b914f8d9b7fbd444180661..2391b0a2514b902daabec46ed3798412b65be2cb 100644
--- a/core/modules/migrate/src/Plugin/migrate/source/EmptySource.php
+++ b/core/modules/migrate/src/Plugin/migrate/source/EmptySource.php
@@ -17,16 +17,16 @@ class EmptySource extends SourcePluginBase {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'id' => t('ID'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function initializeIterator() {
-    return new \ArrayIterator(array(array('id' => '')));
+    return new \ArrayIterator([['id' => '']]);
   }
 
   /**
diff --git a/core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php b/core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php
index 23d03cfd0324728225069ed77267545363ee8e46..e35585034e585e453d788709558a28f251f364b9 100644
--- a/core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php
+++ b/core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php
@@ -198,8 +198,8 @@ protected function getModuleHandler() {
   public function prepareRow(Row $row) {
     $result = TRUE;
     try {
-      $result_hook = $this->getModuleHandler()->invokeAll('migrate_prepare_row', array($row, $this, $this->migration));
-      $result_named_hook = $this->getModuleHandler()->invokeAll('migrate_' . $this->migration->id() . '_prepare_row', array($row, $this, $this->migration));
+      $result_hook = $this->getModuleHandler()->invokeAll('migrate_prepare_row', [$row, $this, $this->migration]);
+      $result_named_hook = $this->getModuleHandler()->invokeAll('migrate_' . $this->migration->id() . '_prepare_row', [$row, $this, $this->migration]);
       // We will skip if any hook returned FALSE.
       $skip = ($result_hook && in_array(FALSE, $result_hook)) || ($result_named_hook && in_array(FALSE, $result_named_hook));
       $save_to_map = TRUE;
@@ -217,7 +217,7 @@ public function prepareRow(Row $row) {
       // Make sure we replace any previous messages for this item with any
       // new ones.
       if ($save_to_map) {
-        $this->idMap->saveIdMapping($row, array(), MigrateIdMapInterface::STATUS_IGNORED);
+        $this->idMap->saveIdMapping($row, [], MigrateIdMapInterface::STATUS_IGNORED);
         $this->currentRow = NULL;
         $this->currentSourceIds = NULL;
       }
diff --git a/core/modules/migrate/src/Plugin/migrate/source/SqlBase.php b/core/modules/migrate/src/Plugin/migrate/source/SqlBase.php
index b78df3b2dca1b3cb94a2a6743fbb2dc502fd11fd..380814c6fd898b096586bc459bac1e70d07b668a 100644
--- a/core/modules/migrate/src/Plugin/migrate/source/SqlBase.php
+++ b/core/modules/migrate/src/Plugin/migrate/source/SqlBase.php
@@ -180,7 +180,7 @@ public function checkRequirements() {
   /**
    * Wrapper for database select.
    */
-  protected function select($table, $alias = NULL, array $options = array()) {
+  protected function select($table, $alias = NULL, array $options = []) {
     $options['fetch'] = \PDO::FETCH_ASSOC;
     return $this->getDatabase()->select($table, $alias, $options);
   }
@@ -220,7 +220,7 @@ protected function initializeIterator() {
       $this->prepareQuery();
 
       // Get the key values, for potential use in joining to the map table.
-      $keys = array();
+      $keys = [];
 
       // The rules for determining what conditions to add to the query are as
       // follows (applying first applicable rule):
@@ -356,7 +356,7 @@ protected function mapJoinable() {
       return FALSE;
     }
 
-    foreach (array('username', 'password', 'host', 'port', 'namespace', 'driver') as $key) {
+    foreach (['username', 'password', 'host', 'port', 'namespace', 'driver'] as $key) {
       if (isset($source_database_options[$key])) {
         if ($id_map_database_options[$key] != $source_database_options[$key]) {
           return FALSE;
diff --git a/core/modules/migrate/src/Row.php b/core/modules/migrate/src/Row.php
index ea70acdf04af194792a3c595ae3ef298d6234fe4..2824dd92bcb51430a5259f5758ce3b25175b069a 100644
--- a/core/modules/migrate/src/Row.php
+++ b/core/modules/migrate/src/Row.php
@@ -15,21 +15,21 @@ class Row {
    *
    * @var array
    */
-  protected $source = array();
+  protected $source = [];
 
   /**
    * The source identifiers.
    *
    * @var array
    */
-  protected $sourceIds = array();
+  protected $sourceIds = [];
 
   /**
    * The destination values.
    *
    * @var array
    */
-  protected $destination = array();
+  protected $destination = [];
 
   /**
    * Level separator of destination and source properties.
@@ -41,11 +41,11 @@ class Row {
    *
    * @var array
    */
-  protected $idMap = array(
+  protected $idMap = [
     'original_hash' => '',
     'hash' => '',
     'source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE,
-  );
+  ];
 
   /**
    * Whether the source has been frozen already.
diff --git a/core/modules/migrate/tests/modules/migrate_events_test/src/Plugin/migrate/destination/DummyDestination.php b/core/modules/migrate/tests/modules/migrate_events_test/src/Plugin/migrate/destination/DummyDestination.php
index 45420d3d8b748e849ec4a9869d4d20c6dc502ef7..415d000b9c0dc34215c95b1f4b408e82b4139964 100644
--- a/core/modules/migrate/tests/modules/migrate_events_test/src/Plugin/migrate/destination/DummyDestination.php
+++ b/core/modules/migrate/tests/modules/migrate_events_test/src/Plugin/migrate/destination/DummyDestination.php
@@ -32,7 +32,7 @@ public function fields(MigrationInterface $migration = NULL) {
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     return ['value' => $row->getDestinationProperty('value')];
   }
 
diff --git a/core/modules/migrate/tests/src/Kernel/MigrateEventsTest.php b/core/modules/migrate/tests/src/Kernel/MigrateEventsTest.php
index b332cbdbfdc35d668305d31a87c973eb9cadc9f7..4de21fde02a82f59ca557ba9de029b4b51d32c60 100644
--- a/core/modules/migrate/tests/src/Kernel/MigrateEventsTest.php
+++ b/core/modules/migrate/tests/src/Kernel/MigrateEventsTest.php
@@ -40,17 +40,17 @@ protected function setUp() {
     parent::setUp();
     $this->state = \Drupal::state();
     \Drupal::service('event_dispatcher')->addListener(MigrateEvents::MAP_SAVE,
-      array($this, 'mapSaveEventRecorder'));
+      [$this, 'mapSaveEventRecorder']);
     \Drupal::service('event_dispatcher')->addListener(MigrateEvents::MAP_DELETE,
-      array($this, 'mapDeleteEventRecorder'));
+      [$this, 'mapDeleteEventRecorder']);
     \Drupal::service('event_dispatcher')->addListener(MigrateEvents::PRE_IMPORT,
-      array($this, 'preImportEventRecorder'));
+      [$this, 'preImportEventRecorder']);
     \Drupal::service('event_dispatcher')->addListener(MigrateEvents::POST_IMPORT,
-      array($this, 'postImportEventRecorder'));
+      [$this, 'postImportEventRecorder']);
     \Drupal::service('event_dispatcher')->addListener(MigrateEvents::PRE_ROW_SAVE,
-      array($this, 'preRowSaveEventRecorder'));
+      [$this, 'preRowSaveEventRecorder']);
     \Drupal::service('event_dispatcher')->addListener(MigrateEvents::POST_ROW_SAVE,
-      array($this, 'postRowSaveEventRecorder'));
+      [$this, 'postRowSaveEventRecorder']);
   }
 
   /**
@@ -129,11 +129,11 @@ public function testMigrateEvents() {
    *   The event name.
    */
   public function mapSaveEventRecorder(MigrateMapSaveEvent $event, $name) {
-    $this->state->set('migrate_events_test.map_save_event', array(
+    $this->state->set('migrate_events_test.map_save_event', [
       'event_name' => $name,
       'map' => $event->getMap(),
       'fields' => $event->getFields(),
-    ));
+    ]);
   }
 
   /**
@@ -145,11 +145,11 @@ public function mapSaveEventRecorder(MigrateMapSaveEvent $event, $name) {
    *   The event name.
    */
   public function mapDeleteEventRecorder(MigrateMapDeleteEvent $event, $name) {
-    $this->state->set('migrate_events_test.map_delete_event', array(
+    $this->state->set('migrate_events_test.map_delete_event', [
       'event_name' => $name,
       'map' => $event->getMap(),
       'source_id' => $event->getSourceId(),
-    ));
+    ]);
   }
 
   /**
@@ -161,10 +161,10 @@ public function mapDeleteEventRecorder(MigrateMapDeleteEvent $event, $name) {
    *   The event name.
    */
   public function preImportEventRecorder(MigrateImportEvent $event, $name) {
-    $this->state->set('migrate_events_test.pre_import_event', array(
+    $this->state->set('migrate_events_test.pre_import_event', [
       'event_name' => $name,
       'migration' => $event->getMigration(),
-    ));
+    ]);
   }
 
   /**
@@ -176,10 +176,10 @@ public function preImportEventRecorder(MigrateImportEvent $event, $name) {
    *   The event name.
    */
   public function postImportEventRecorder(MigrateImportEvent $event, $name) {
-    $this->state->set('migrate_events_test.post_import_event', array(
+    $this->state->set('migrate_events_test.post_import_event', [
       'event_name' => $name,
       'migration' => $event->getMigration(),
-    ));
+    ]);
   }
 
   /**
@@ -191,11 +191,11 @@ public function postImportEventRecorder(MigrateImportEvent $event, $name) {
    *   The event name.
    */
   public function preRowSaveEventRecorder(MigratePreRowSaveEvent $event, $name) {
-    $this->state->set('migrate_events_test.pre_row_save_event', array(
+    $this->state->set('migrate_events_test.pre_row_save_event', [
       'event_name' => $name,
       'migration' => $event->getMigration(),
       'row' => $event->getRow(),
-    ));
+    ]);
   }
 
   /**
@@ -207,12 +207,12 @@ public function preRowSaveEventRecorder(MigratePreRowSaveEvent $event, $name) {
    *   The event name.
    */
   public function postRowSaveEventRecorder(MigratePostRowSaveEvent $event, $name) {
-    $this->state->set('migrate_events_test.post_row_save_event', array(
+    $this->state->set('migrate_events_test.post_row_save_event', [
       'event_name' => $name,
       'migration' => $event->getMigration(),
       'row' => $event->getRow(),
       'destination_id_values' => $event->getDestinationIdValues(),
-    ));
+    ]);
   }
 
 }
diff --git a/core/modules/migrate/tests/src/Kernel/MigrateExternalTranslatedTest.php b/core/modules/migrate/tests/src/Kernel/MigrateExternalTranslatedTest.php
index 384b8067111f3f26db3de77ef4726ab54ff06e14..d9728f587e0a7b186284d293a2ff7609f31a7b53 100644
--- a/core/modules/migrate/tests/src/Kernel/MigrateExternalTranslatedTest.php
+++ b/core/modules/migrate/tests/src/Kernel/MigrateExternalTranslatedTest.php
@@ -27,7 +27,7 @@ class MigrateExternalTranslatedTest extends MigrateTestBase {
   public function setUp() {
     parent::setUp();
     $this->installSchema('system', ['sequences']);
-    $this->installSchema('node', array('node_access'));
+    $this->installSchema('node', ['node_access']);
     $this->installEntitySchema('user');
     $this->installEntitySchema('node');
 
diff --git a/core/modules/migrate/tests/src/Kernel/MigrateInterruptionTest.php b/core/modules/migrate/tests/src/Kernel/MigrateInterruptionTest.php
index 9ff76f6a486d6255b56e23c399bb021968ed2164..d99329e18181a2c1ac12e003e08132bf11b744ae 100644
--- a/core/modules/migrate/tests/src/Kernel/MigrateInterruptionTest.php
+++ b/core/modules/migrate/tests/src/Kernel/MigrateInterruptionTest.php
@@ -29,7 +29,7 @@ class MigrateInterruptionTest extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
     \Drupal::service('event_dispatcher')->addListener(MigrateEvents::POST_ROW_SAVE,
-      array($this, 'postRowSaveEventRecorder'));
+      [$this, 'postRowSaveEventRecorder']);
   }
 
   /**
diff --git a/core/modules/migrate/tests/src/Kernel/MigrateMessageTest.php b/core/modules/migrate/tests/src/Kernel/MigrateMessageTest.php
index 4f4af7dac56fca6e42c121fbe8c8acf2489b26e4..33013367e9bb04e2c3a615e7d4692add28578b3b 100644
--- a/core/modules/migrate/tests/src/Kernel/MigrateMessageTest.php
+++ b/core/modules/migrate/tests/src/Kernel/MigrateMessageTest.php
@@ -89,7 +89,7 @@ public function testMessagesNotTeed() {
   public function testMessagesTeed() {
     // Ask to receive any messages sent to the idmap.
     \Drupal::service('event_dispatcher')->addListener(MigrateEvents::IDMAP_MESSAGE,
-      array($this, 'mapMessageRecorder'));
+      [$this, 'mapMessageRecorder']);
     $executable = new MigrateExecutable($this->migration, $this);
     $executable->import();
     $this->assertIdentical(count($this->messages), 1);
diff --git a/core/modules/migrate/tests/src/Kernel/MigrateStatusTest.php b/core/modules/migrate/tests/src/Kernel/MigrateStatusTest.php
index b31a67ee8a2212ceb44027398d8668fa71ca0f1c..7dc0b5b9b63c74396a19bdea308f917116b1bc23 100644
--- a/core/modules/migrate/tests/src/Kernel/MigrateStatusTest.php
+++ b/core/modules/migrate/tests/src/Kernel/MigrateStatusTest.php
@@ -33,13 +33,13 @@ public function testStatus() {
     $this->assertIdentical($status, MigrationInterface::STATUS_IDLE);
 
     // Test setting and retrieving all known status values.
-    $status_list = array(
+    $status_list = [
       MigrationInterface::STATUS_IDLE,
       MigrationInterface::STATUS_IMPORTING,
       MigrationInterface::STATUS_ROLLING_BACK,
       MigrationInterface::STATUS_STOPPING,
       MigrationInterface::STATUS_DISABLED,
-    );
+    ];
     foreach ($status_list as $status) {
       $migration->setStatus($status);
       $this->assertIdentical($migration->getStatus(), $status);
diff --git a/core/modules/migrate/tests/src/Kernel/MigrateTestBase.php b/core/modules/migrate/tests/src/Kernel/MigrateTestBase.php
index 8494dc6a450e468095c44cf6cf572435c9a734ed..b0fc0b8aada03856ad556bafe371c10d4e9d3910 100644
--- a/core/modules/migrate/tests/src/Kernel/MigrateTestBase.php
+++ b/core/modules/migrate/tests/src/Kernel/MigrateTestBase.php
@@ -47,7 +47,7 @@ abstract class MigrateTestBase extends KernelTestBase implements MigrateMessageI
    */
   protected $sourceDatabase;
 
-  public static $modules = array('migrate');
+  public static $modules = ['migrate'];
 
   /**
    * {@inheritdoc}
@@ -201,7 +201,7 @@ public function display($message, $type = 'status') {
    */
   public function startCollectingMessages() {
     $this->collectMessages = TRUE;
-    $this->migrateMessages = array();
+    $this->migrateMessages = [];
   }
 
   /**
diff --git a/core/modules/migrate/tests/src/Kernel/SqlBaseTest.php b/core/modules/migrate/tests/src/Kernel/SqlBaseTest.php
index a7b0dac10220c69c47f1b8fd4dca95649c4f8640..ef15bd575a2728294df75091f5abea09a978cf03 100644
--- a/core/modules/migrate/tests/src/Kernel/SqlBaseTest.php
+++ b/core/modules/migrate/tests/src/Kernel/SqlBaseTest.php
@@ -30,7 +30,7 @@ public function testConnectionTypes() {
 
     $target = 'test_db_target';
     $key = 'test_migrate_connection';
-    $config = array('target' => $target, 'key' => $key);
+    $config = ['target' => $target, 'key' => $key];
     $sql_base->setConfiguration($config);
     Database::addConnectionInfo($key, $target, Database::getConnectionInfo('default')['default']);
 
@@ -44,7 +44,7 @@ public function testConnectionTypes() {
     $target = 'test_db_target2';
     $key = 'test_migrate_connection2';
     $database = Database::getConnectionInfo('default')['default'];
-    $config = array('target' => $target, 'key' => $key, 'database' => $database);
+    $config = ['target' => $target, 'key' => $key, 'database' => $database];
     $sql_base->setConfiguration($config);
 
     // Call getDatabase() to get the connection defined.
diff --git a/core/modules/migrate/tests/src/Unit/Exception/RequirementsExceptionTest.php b/core/modules/migrate/tests/src/Unit/Exception/RequirementsExceptionTest.php
index 72d37ed73f205c96c71cebd7acdc4877e2fafe7e..b3fafc8ec1ba011912cb9315318f836c6659339d 100644
--- a/core/modules/migrate/tests/src/Unit/Exception/RequirementsExceptionTest.php
+++ b/core/modules/migrate/tests/src/Unit/Exception/RequirementsExceptionTest.php
@@ -34,18 +34,18 @@ public function testGetExceptionString($expected, $message, $requirements) {
    * Provides a list of requirements to test.
    */
   public function getRequirementsProvider() {
-    return array(
-      array(
+    return [
+      [
         'requirements: random_jackson_pivot.',
         'Single Requirement',
-        array('requirements' => $this->missingRequirements[0]),
-      ),
-      array(
+        ['requirements' => $this->missingRequirements[0]],
+      ],
+      [
         'requirements: random_jackson_pivot. requirements: 51_Eridani_b.',
         'Multiple Requirements',
-        array('requirements' => $this->missingRequirements),
-      ),
-    );
+        ['requirements' => $this->missingRequirements],
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/migrate/tests/src/Unit/MigrateExecutableMemoryExceededTest.php b/core/modules/migrate/tests/src/Unit/MigrateExecutableMemoryExceededTest.php
index 42d500d81c73983af2e878ab0a40c610acff7174..d14e54a4278269e6e90da7c1e2977bf21883b82b 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateExecutableMemoryExceededTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateExecutableMemoryExceededTest.php
@@ -35,9 +35,9 @@ class MigrateExecutableMemoryExceededTest extends MigrateTestCase {
    *
    * @var array
    */
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-  );
+  ];
 
   /**
    * The php.ini memory_limit value.
diff --git a/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php b/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
index 60809a90d7647555661e91132ff3566564a9fe99..ff320df6c4ee9f05683ef5abcd3198b470dfdd2f 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
@@ -40,9 +40,9 @@ class MigrateExecutableTest extends MigrateTestCase {
    *
    * @var array
    */
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -91,12 +91,12 @@ public function testImportWithValidRow() {
 
     $row->expects($this->once())
       ->method('getSourceIdValues')
-      ->will($this->returnValue(array('id' => 'test')));
+      ->will($this->returnValue(['id' => 'test']));
 
     $this->idMap->expects($this->once())
       ->method('lookupDestinationId')
-      ->with(array('id' => 'test'))
-      ->will($this->returnValue(array('test')));
+      ->with(['id' => 'test'])
+      ->will($this->returnValue(['test']));
 
     $source->expects($this->once())
       ->method('current')
@@ -106,13 +106,13 @@ public function testImportWithValidRow() {
 
     $this->migration->expects($this->once())
       ->method('getProcessPlugins')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $destination = $this->getMock('Drupal\migrate\Plugin\MigrateDestinationInterface');
     $destination->expects($this->once())
       ->method('import')
-      ->with($row, array('test'))
-      ->will($this->returnValue(array('id' => 'test')));
+      ->with($row, ['test'])
+      ->will($this->returnValue(['id' => 'test']));
 
     $this->migration
       ->method('getDestinationPlugin')
@@ -133,12 +133,12 @@ public function testImportWithValidRowWithoutDestinationId() {
 
     $row->expects($this->once())
       ->method('getSourceIdValues')
-      ->will($this->returnValue(array('id' => 'test')));
+      ->will($this->returnValue(['id' => 'test']));
 
     $this->idMap->expects($this->once())
       ->method('lookupDestinationId')
-      ->with(array('id' => 'test'))
-      ->will($this->returnValue(array('test')));
+      ->with(['id' => 'test'])
+      ->will($this->returnValue(['test']));
 
     $source->expects($this->once())
       ->method('current')
@@ -148,12 +148,12 @@ public function testImportWithValidRowWithoutDestinationId() {
 
     $this->migration->expects($this->once())
       ->method('getProcessPlugins')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $destination = $this->getMock('Drupal\migrate\Plugin\MigrateDestinationInterface');
     $destination->expects($this->once())
       ->method('import')
-      ->with($row, array('test'))
+      ->with($row, ['test'])
       ->will($this->returnValue(TRUE));
 
     $this->migration
@@ -178,7 +178,7 @@ public function testImportWithValidRowNoDestinationValues() {
 
     $row->expects($this->once())
       ->method('getSourceIdValues')
-      ->will($this->returnValue(array('id' => 'test')));
+      ->will($this->returnValue(['id' => 'test']));
 
     $source->expects($this->once())
       ->method('current')
@@ -188,13 +188,13 @@ public function testImportWithValidRowNoDestinationValues() {
 
     $this->migration->expects($this->once())
       ->method('getProcessPlugins')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $destination = $this->getMock('Drupal\migrate\Plugin\MigrateDestinationInterface');
     $destination->expects($this->once())
       ->method('import')
-      ->with($row, array('test'))
-      ->will($this->returnValue(array()));
+      ->with($row, ['test'])
+      ->will($this->returnValue([]));
 
     $this->migration
       ->method('getDestinationPlugin')
@@ -202,7 +202,7 @@ public function testImportWithValidRowNoDestinationValues() {
 
     $this->idMap->expects($this->once())
       ->method('saveIdMapping')
-      ->with($row, array(), MigrateIdMapInterface::STATUS_FAILED, NULL);
+      ->with($row, [], MigrateIdMapInterface::STATUS_FAILED, NULL);
 
     $this->idMap->expects($this->once())
       ->method('messageCount')
@@ -213,8 +213,8 @@ public function testImportWithValidRowNoDestinationValues() {
 
     $this->idMap->expects($this->once())
       ->method('lookupDestinationId')
-      ->with(array('id' => 'test'))
-      ->will($this->returnValue(array('test')));
+      ->with(['id' => 'test'])
+      ->will($this->returnValue(['test']));
 
     $this->message->expects($this->once())
       ->method('display')
@@ -238,7 +238,7 @@ public function testImportWithValidRowWithDestinationMigrateException() {
 
     $row->expects($this->once())
       ->method('getSourceIdValues')
-      ->will($this->returnValue(array('id' => 'test')));
+      ->will($this->returnValue(['id' => 'test']));
 
     $source->expects($this->once())
       ->method('current')
@@ -248,12 +248,12 @@ public function testImportWithValidRowWithDestinationMigrateException() {
 
     $this->migration->expects($this->once())
       ->method('getProcessPlugins')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $destination = $this->getMock('Drupal\migrate\Plugin\MigrateDestinationInterface');
     $destination->expects($this->once())
       ->method('import')
-      ->with($row, array('test'))
+      ->with($row, ['test'])
       ->will($this->throwException(new MigrateException($exception_message)));
 
     $this->migration
@@ -262,15 +262,15 @@ public function testImportWithValidRowWithDestinationMigrateException() {
 
     $this->idMap->expects($this->once())
       ->method('saveIdMapping')
-      ->with($row, array(), MigrateIdMapInterface::STATUS_FAILED, NULL);
+      ->with($row, [], MigrateIdMapInterface::STATUS_FAILED, NULL);
 
     $this->idMap->expects($this->once())
       ->method('saveMessage');
 
     $this->idMap->expects($this->once())
       ->method('lookupDestinationId')
-      ->with(array('id' => 'test'))
-      ->will($this->returnValue(array('test')));
+      ->with(['id' => 'test'])
+      ->will($this->returnValue(['test']));
 
     $this->assertSame(MigrationInterface::RESULT_COMPLETED, $this->executable->import());
   }
@@ -290,7 +290,7 @@ public function testImportWithValidRowWithProcesMigrateException() {
 
     $row->expects($this->once())
       ->method('getSourceIdValues')
-      ->willReturn(array('id' => 'test'));
+      ->willReturn(['id' => 'test']);
 
     $source->expects($this->once())
       ->method('current')
@@ -312,7 +312,7 @@ public function testImportWithValidRowWithProcesMigrateException() {
 
     $this->idMap->expects($this->once())
       ->method('saveIdMapping')
-      ->with($row, array(), MigrateIdMapInterface::STATUS_FAILED, NULL);
+      ->with($row, [], MigrateIdMapInterface::STATUS_FAILED, NULL);
 
     $this->idMap->expects($this->once())
       ->method('saveMessage');
@@ -336,7 +336,7 @@ public function testImportWithValidRowWithException() {
 
     $row->expects($this->once())
       ->method('getSourceIdValues')
-      ->will($this->returnValue(array('id' => 'test')));
+      ->will($this->returnValue(['id' => 'test']));
 
     $source->expects($this->once())
       ->method('current')
@@ -346,12 +346,12 @@ public function testImportWithValidRowWithException() {
 
     $this->migration->expects($this->once())
       ->method('getProcessPlugins')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $destination = $this->getMock('Drupal\migrate\Plugin\MigrateDestinationInterface');
     $destination->expects($this->once())
       ->method('import')
-      ->with($row, array('test'))
+      ->with($row, ['test'])
       ->will($this->throwException(new \Exception($exception_message)));
 
     $this->migration
@@ -360,15 +360,15 @@ public function testImportWithValidRowWithException() {
 
     $this->idMap->expects($this->once())
       ->method('saveIdMapping')
-      ->with($row, array(), MigrateIdMapInterface::STATUS_FAILED, NULL);
+      ->with($row, [], MigrateIdMapInterface::STATUS_FAILED, NULL);
 
     $this->idMap->expects($this->once())
       ->method('saveMessage');
 
     $this->idMap->expects($this->once())
       ->method('lookupDestinationId')
-      ->with(array('id' => 'test'))
-      ->will($this->returnValue(array('test')));
+      ->with(['id' => 'test'])
+      ->will($this->returnValue(['test']));
 
     $this->message->expects($this->once())
       ->method('display')
@@ -381,15 +381,15 @@ public function testImportWithValidRowWithException() {
    * Tests the processRow method.
    */
   public function testProcessRow() {
-    $expected = array(
+    $expected = [
       'test' => 'test destination',
       'test1' => 'test1 destination'
-    );
+    ];
     foreach ($expected as $key => $value) {
       $plugins[$key][0] = $this->getMock('Drupal\migrate\Plugin\MigrateProcessInterface');
       $plugins[$key][0]->expects($this->once())
         ->method('getPluginDefinition')
-        ->will($this->returnValue(array()));
+        ->will($this->returnValue([]));
       $plugins[$key][0]->expects($this->once())
         ->method('transform')
         ->will($this->returnValue($value));
@@ -413,10 +413,10 @@ public function testProcessRowEmptyPipeline() {
     $this->migration->expects($this->once())
       ->method('getProcessPlugins')
       ->with(NULL)
-      ->will($this->returnValue(array('test' => array())));
+      ->will($this->returnValue(['test' => []]));
     $row = new Row();
     $this->executable->processRow($row);
-    $this->assertSame($row->getDestination(), array());
+    $this->assertSame($row->getDestination(), []);
   }
 
   /**
diff --git a/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
index 3c9aa4234a6ea0e2a3384a5bb82118780ce51f40..3c3cba8859d27e8f16be6831cf7ce0d8307cd7a1 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
@@ -16,70 +16,70 @@ class MigrateSqlIdMapEnsureTablesTest extends MigrateTestCase {
    *
    * @var array
    */
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'sql_idmap_test',
-  );
+  ];
 
   /**
    * Tests the ensureTables method when the tables do not exist.
    */
   public function testEnsureTablesNotExist() {
-    $fields['source_ids_hash'] = Array(
+    $fields['source_ids_hash'] = [
       'type' => 'varchar',
       'length' => 64,
       'not null' => 1,
       'description' => 'Hash of source ids. Used as primary key'
-    );
-    $fields['sourceid1'] = array(
+    ];
+    $fields['sourceid1'] = [
       'type' => 'int',
       'not null' => TRUE,
-    );
-    $fields['sourceid2'] = array(
+    ];
+    $fields['sourceid2'] = [
       'type' => 'int',
       'not null' => TRUE,
-    );
-    $fields['destid1'] = array(
+    ];
+    $fields['destid1'] = [
       'type' => 'varchar',
       'length' => 255,
       'not null' => FALSE,
-    );
-    $fields['source_row_status'] = array(
+    ];
+    $fields['source_row_status'] = [
       'type' => 'int',
       'size' => 'tiny',
       'unsigned' => TRUE,
       'not null' => TRUE,
       'default' => MigrateIdMapInterface::STATUS_IMPORTED,
       'description' => 'Indicates current status of the source row',
-    );
-    $fields['rollback_action'] = array(
+    ];
+    $fields['rollback_action'] = [
       'type' => 'int',
       'size' => 'tiny',
       'unsigned' => TRUE,
       'not null' => TRUE,
       'default' => MigrateIdMapInterface::ROLLBACK_DELETE,
       'description' => 'Flag indicating what to do for this item on rollback',
-    );
-    $fields['last_imported'] = array(
+    ];
+    $fields['last_imported'] = [
       'type' => 'int',
       'unsigned' => TRUE,
       'not null' => TRUE,
       'default' => 0,
       'description' => 'UNIX timestamp of the last time this row was imported',
-    );
-    $fields['hash'] = array(
+    ];
+    $fields['hash'] = [
       'type' => 'varchar',
       'length' => '64',
       'not null' => FALSE,
       'description' => 'Hash of source row data, for detecting changes',
-    );
-    $map_table_schema = array(
+    ];
+    $map_table_schema = [
       'description' => 'Mappings from source identifier value(s) to destination identifier value(s).',
       'fields' => $fields,
-      'primary key' => array('source_ids_hash'),
+      'primary key' => ['source_ids_hash'],
       'indexes' => [
         'source' => ['sourceid1', 'sourceid2'],
       ],
-    );
+    ];
     $schema = $this->getMockBuilder('Drupal\Core\Database\Schema')
       ->disableOriginalConstructor()
       ->getMock();
@@ -91,34 +91,34 @@ public function testEnsureTablesNotExist() {
       ->method('createTable')
       ->with('migrate_map_sql_idmap_test', $map_table_schema);
     // Now do the message table.
-    $fields = array();
-    $fields['msgid'] = array(
+    $fields = [];
+    $fields['msgid'] = [
       'type' => 'serial',
       'unsigned' => TRUE,
       'not null' => TRUE,
-    );
-    $fields['source_ids_hash'] = Array(
+    ];
+    $fields['source_ids_hash'] = [
       'type' => 'varchar',
       'length' => 64,
       'not null' => 1,
       'description' => 'Hash of source ids. Used as primary key'
-    );
-    $fields['level'] = array(
+    ];
+    $fields['level'] = [
       'type' => 'int',
       'unsigned' => TRUE,
       'not null' => TRUE,
       'default' => 1,
-    );
-    $fields['message'] = array(
+    ];
+    $fields['message'] = [
       'type' => 'text',
       'size' => 'medium',
       'not null' => TRUE,
-    );
-    $table_schema = array(
+    ];
+    $table_schema = [
       'description' => 'Messages generated during a migration process',
       'fields' => $fields,
-      'primary key' => array('msgid'),
-    );
+      'primary key' => ['msgid'],
+    ];
 
     $schema->expects($this->at(2))
       ->method('tableExists')
@@ -147,14 +147,14 @@ public function testEnsureTablesExist() {
       ->method('fieldExists')
       ->with('migrate_map_sql_idmap_test', 'rollback_action')
       ->will($this->returnValue(FALSE));
-    $field_schema = array(
+    $field_schema = [
       'type' => 'int',
       'size' => 'tiny',
       'unsigned' => TRUE,
       'not null' => TRUE,
       'default' => 0,
       'description' => 'Flag indicating what to do for this item on rollback',
-    );
+    ];
     $schema->expects($this->at(2))
       ->method('addField')
       ->with('migrate_map_sql_idmap_test', 'rollback_action', $field_schema);
@@ -162,12 +162,12 @@ public function testEnsureTablesExist() {
       ->method('fieldExists')
       ->with('migrate_map_sql_idmap_test', 'hash')
       ->will($this->returnValue(FALSE));
-    $field_schema = array(
+    $field_schema = [
       'type' => 'varchar',
       'length' => '64',
       'not null' => FALSE,
       'description' => 'Hash of source row data, for detecting changes',
-    );
+    ];
     $schema->expects($this->at(4))
       ->method('addField')
       ->with('migrate_map_sql_idmap_test', 'hash', $field_schema);
@@ -175,12 +175,12 @@ public function testEnsureTablesExist() {
       ->method('fieldExists')
       ->with('migrate_map_sql_idmap_test', 'source_ids_hash')
       ->will($this->returnValue(FALSE));
-    $field_schema = array(
+    $field_schema = [
       'type' => 'varchar',
       'length' => '64',
       'not null' => TRUE,
       'description' => 'Hash of source ids. Used as primary key',
-    );
+    ];
     $schema->expects($this->at(6))
       ->method('addField')
       ->with('migrate_map_sql_idmap_test', 'source_ids_hash', $field_schema);
@@ -208,31 +208,31 @@ protected function runEnsureTablesTest($schema) {
     $plugin = $this->getMock('Drupal\migrate\Plugin\MigrateSourceInterface');
     $plugin->expects($this->any())
       ->method('getIds')
-      ->willReturn(array(
-      'source_id_property' => array(
+      ->willReturn([
+      'source_id_property' => [
         'type' => 'integer',
-      ),
-      'source_id_property_2' => array(
+      ],
+      'source_id_property_2' => [
         'type' => 'integer',
-      ),
-    ));
+      ],
+    ]);
     $migration->expects($this->any())
       ->method('getSourcePlugin')
       ->willReturn($plugin);
     $plugin = $this->getMock('Drupal\migrate\Plugin\MigrateSourceInterface');
     $plugin->expects($this->any())
       ->method('getIds')
-      ->willReturn(array(
-      'destination_id_property' => array(
+      ->willReturn([
+      'destination_id_property' => [
         'type' => 'string',
-      ),
-    ));
+      ],
+    ]);
     $migration->expects($this->any())
       ->method('getDestinationPlugin')
       ->willReturn($plugin);
     /** @var \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher */
     $event_dispatcher = $this->getMock('Symfony\Component\EventDispatcher\EventDispatcherInterface');
-    $map = new TestSqlIdMap($database, array(), 'sql', array(), $migration, $event_dispatcher);
+    $map = new TestSqlIdMap($database, [], 'sql', [], $migration, $event_dispatcher);
     $map->getDatabase();
   }
 
diff --git a/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapTest.php b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapTest.php
index e38e971be3b66d4899741ad1a9e80cdb3f8bd9a8..2ad2b3dc518efc50f0a2a8a133ca83ab258a8c5d 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapTest.php
@@ -130,11 +130,11 @@ protected function getIdMap() {
    *   - hash
    */
   protected function idMapDefaults() {
-    $defaults = array(
+    $defaults = [
       'source_row_status' => MigrateIdMapInterface::STATUS_IMPORTED,
       'rollback_action' => MigrateIdMapInterface::ROLLBACK_DELETE,
       'hash' => '',
-    );
+    ];
     // By default, the PDO SQLite driver strongly prefers to return strings
     // from SELECT queries. Even for columns that don't store strings. Even
     // if the connection's STRINGIFY_FETCHES attribute is FALSE. This can cause
@@ -157,9 +157,9 @@ protected function idMapDefaults() {
    * - updating work.
    */
   public function testSaveIdMapping() {
-    $source = array(
+    $source = [
       'source_id_property' => 'source_value',
-    );
+    ];
     $row = new Row($source, ['source_id_property' => []]);
     $id_map = $this->getIdMap();
     $id_map->saveIdMapping($row, ['destination_id_property' => 2]);
diff --git a/core/modules/migrate/tests/src/Unit/MigrateSqlSourceTestCase.php b/core/modules/migrate/tests/src/Unit/MigrateSqlSourceTestCase.php
index 962a75dca62d9d5f7315e4441ce0ac4599e6f08f..be600c8d4f4ef58bfc856e54c73ec97594c00b86 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateSqlSourceTestCase.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateSqlSourceTestCase.php
@@ -33,7 +33,7 @@ abstract class MigrateSqlSourceTestCase extends MigrateTestCase {
    *
    * @var array
    */
-  protected $databaseContents = array();
+  protected $databaseContents = [];
 
   /**
    * The plugin class under test.
@@ -60,7 +60,7 @@ abstract class MigrateSqlSourceTestCase extends MigrateTestCase {
    *
    * @var array
    */
-  protected $expectedResults = array();
+  protected $expectedResults = [];
 
   /**
    * Expected count of source rows.
@@ -112,7 +112,7 @@ protected function setUp() {
 
     // Setup the plugin.
     $plugin_class = static::PLUGIN_CLASS;
-    $plugin = new $plugin_class($this->migrationConfiguration['source'], $this->migrationConfiguration['source']['plugin'], array(), $migration, $state, $entity_manager);
+    $plugin = new $plugin_class($this->migrationConfiguration['source'], $this->migrationConfiguration['source']['plugin'], [], $migration, $state, $entity_manager);
 
     // Do some reflection to set the database and moduleHandler.
     $plugin_reflection = new \ReflectionClass($plugin);
@@ -122,7 +122,7 @@ protected function setUp() {
     $module_handler_property->setAccessible(TRUE);
 
     // Set the database and the module handler onto our plugin.
-    $database_property->setValue($plugin, $this->getDatabase($this->databaseContents + array('test_map' => array())));
+    $database_property->setValue($plugin, $this->getDatabase($this->databaseContents + ['test_map' => []]));
     $module_handler_property->setValue($plugin, $module_handler);
 
     $plugin->setStringTranslation($this->getStringTranslationStub());
diff --git a/core/modules/migrate/tests/src/Unit/RowTest.php b/core/modules/migrate/tests/src/Unit/RowTest.php
index ec04f826b3732ed29300f5c2734ec90181baacb6..aa3a7d927b513a5757dd9fede50d6c96e01e939d 100644
--- a/core/modules/migrate/tests/src/Unit/RowTest.php
+++ b/core/modules/migrate/tests/src/Unit/RowTest.php
@@ -17,19 +17,19 @@ class RowTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $testSourceIds = array(
+  protected $testSourceIds = [
     'nid' => 'Node ID',
-  );
+  ];
 
   /**
    * The test values.
    *
    * @var array
    */
-  protected $testValues = array(
+  protected $testValues = [
     'nid' => 1,
     'title' => 'node 1',
-  );
+  ];
 
   /**
    * The test hash.
@@ -50,7 +50,7 @@ class RowTest extends UnitTestCase {
    */
   public function testRowWithoutData() {
     $row = new Row();
-    $this->assertSame(array(), $row->getSource(), 'Empty row');
+    $this->assertSame([], $row->getSource(), 'Empty row');
   }
 
   /**
@@ -65,8 +65,8 @@ public function testRowWithBasicData() {
    * Tests object creation: multiple source IDs.
    */
   public function testRowWithMultipleSourceIds() {
-    $multi_source_ids = $this->testSourceIds + array('vid' => 'Node revision');
-    $multi_source_ids_values = $this->testValues + array('vid' => 1);
+    $multi_source_ids = $this->testSourceIds + ['vid' => 'Node revision'];
+    $multi_source_ids_values = $this->testValues + ['vid' => 1];
     $row = new Row($multi_source_ids_values, $multi_source_ids);
     $this->assertSame($multi_source_ids_values, $row->getSource(), 'Row with data, multifield id.');
   }
@@ -77,9 +77,9 @@ public function testRowWithMultipleSourceIds() {
    * @expectedException \Exception
    */
   public function testRowWithInvalidData() {
-    $invalid_values = array(
+    $invalid_values = [
       'title' => 'node X',
-    );
+    ];
     $row = new Row($invalid_values, $this->testSourceIds);
   }
 
@@ -123,11 +123,11 @@ public function testHashing() {
     $this->assertSame($this->testHash, $row->getHash(), 'Correct hash even doing it twice.');
 
     // Set the map to needs update.
-    $test_id_map = array(
+    $test_id_map = [
       'original_hash' => '',
       'hash' => '',
       'source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE,
-    );
+    ];
     $row->setIdMap($test_id_map);
     $this->assertTrue($row->needsUpdate());
 
@@ -143,30 +143,30 @@ public function testHashing() {
     $this->assertSame(64, strlen($row->getHash()));
 
     // Set the map to successfully imported.
-    $test_id_map = array(
+    $test_id_map = [
       'original_hash' => '',
       'hash' => '',
       'source_row_status' => MigrateIdMapInterface::STATUS_IMPORTED,
-    );
+    ];
     $row->setIdMap($test_id_map);
     $this->assertFalse($row->needsUpdate());
 
     // Set the same hash value and ensure it was not changed.
     $random = $this->randomMachineName();
-    $test_id_map = array(
+    $test_id_map = [
       'original_hash' => $random,
       'hash' => $random,
       'source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE,
-    );
+    ];
     $row->setIdMap($test_id_map);
     $this->assertFalse($row->changed());
 
     // Set different has values to ensure it is marked as changed.
-    $test_id_map = array(
+    $test_id_map = [
       'original_hash' => $this->randomMachineName(),
       'hash' => $this->randomMachineName(),
       'source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE,
-    );
+    ];
     $row->setIdMap($test_id_map);
     $this->assertTrue($row->changed());
   }
@@ -179,11 +179,11 @@ public function testHashing() {
    */
   public function testGetSetIdMap() {
     $row = new Row($this->testValues, $this->testSourceIds);
-    $test_id_map = array(
+    $test_id_map = [
       'original_hash' => '',
       'hash' => '',
       'source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE,
-    );
+    ];
     $row->setIdMap($test_id_map);
     $this->assertEquals($test_id_map, $row->getIdMap());
   }
@@ -193,7 +193,7 @@ public function testGetSetIdMap() {
    */
   public function testSourceIdValues() {
     $row = new Row($this->testValues, $this->testSourceIds);
-    $this->assertSame(array('nid' => $this->testValues['nid']), $row->getSourceIdValues());
+    $this->assertSame(['nid' => $this->testValues['nid']], $row->getSourceIdValues());
   }
 
   /**
@@ -219,7 +219,7 @@ public function testDestination() {
     // Set a destination.
     $row->setDestinationProperty('nid', 2);
     $this->assertTrue($row->hasDestinationProperty('nid'));
-    $this->assertEquals(array('nid' => 2), $row->getDestination());
+    $this->assertEquals(['nid' => 2], $row->getDestination());
   }
 
   /**
diff --git a/core/modules/migrate/tests/src/Unit/TestSqlIdMap.php b/core/modules/migrate/tests/src/Unit/TestSqlIdMap.php
index b64ca9b1caff46136ec0c904c11e434e2af61515..6d3333848f2224c78f5b1e739946d42199c90a3e 100644
--- a/core/modules/migrate/tests/src/Unit/TestSqlIdMap.php
+++ b/core/modules/migrate/tests/src/Unit/TestSqlIdMap.php
@@ -55,21 +55,21 @@ public function getDatabase() {
    */
   protected function getFieldSchema(array $id_definition) {
     if (!isset($id_definition['type'])) {
-      return array();
+      return [];
     }
     switch ($id_definition['type']) {
       case 'integer':
-        return array(
+        return [
           'type' => 'int',
           'not null' => TRUE,
-        );
+        ];
 
       case 'string':
-        return array(
+        return [
           'type' => 'varchar',
           'length' => 255,
           'not null' => FALSE,
-        );
+        ];
 
       default:
         throw new MigrateException($id_definition['type'] . ' not supported');
diff --git a/core/modules/migrate/tests/src/Unit/destination/ConfigTest.php b/core/modules/migrate/tests/src/Unit/destination/ConfigTest.php
index 25eeebb1802f62cf53cb4cc5daeb2a6ae33eca7b..b57cffea49d4b4420c342d7c95f86f3eadad6371 100644
--- a/core/modules/migrate/tests/src/Unit/destination/ConfigTest.php
+++ b/core/modules/migrate/tests/src/Unit/destination/ConfigTest.php
@@ -16,9 +16,9 @@ class ConfigTest extends UnitTestCase {
    * Test the import method.
    */
   public function testImport() {
-    $source = array(
+    $source = [
       'test' => 'x',
-    );
+    ];
     $migration = $this->getMockBuilder('Drupal\migrate\Plugin\Migration')
       ->disableOriginalConstructor()
       ->getMock();
@@ -54,7 +54,7 @@ public function testImport() {
       ->method('getLanguageConfigOverride')
       ->with('fr', 'd8_config')
       ->will($this->returnValue($config));
-    $destination = new Config(array('config_name' => 'd8_config'), 'd8_config', array('pluginId' => 'd8_config'), $migration, $config_factory, $language_manager);
+    $destination = new Config(['config_name' => 'd8_config'], 'd8_config', ['pluginId' => 'd8_config'], $migration, $config_factory, $language_manager);
     $destination_id = $destination->import($row);
     $this->assertEquals($destination_id, ['d8_config']);
   }
@@ -63,9 +63,9 @@ public function testImport() {
    * Test the import method.
    */
   public function testLanguageImport() {
-    $source = array(
+    $source = [
       'langcode' => 'mi',
-    );
+    ];
     $migration = $this->getMockBuilder(MigrationInterface::class)
       ->disableOriginalConstructor()
       ->getMock();
@@ -104,7 +104,7 @@ public function testLanguageImport() {
       ->method('getLanguageConfigOverride')
       ->with('mi', 'd8_config')
       ->will($this->returnValue($config));
-    $destination = new Config(array('config_name' => 'd8_config', 'translations' => 'true'), 'd8_config', array('pluginId' => 'd8_config'), $migration, $config_factory, $language_manager);
+    $destination = new Config(['config_name' => 'd8_config', 'translations' => 'true'], 'd8_config', ['pluginId' => 'd8_config'], $migration, $config_factory, $language_manager);
     $destination_id = $destination->import($row);
     $this->assertEquals($destination_id, ['d8_config', 'mi']);
   }
diff --git a/core/modules/migrate/tests/src/Unit/destination/EntityRevisionTest.php b/core/modules/migrate/tests/src/Unit/destination/EntityRevisionTest.php
index 1886914b5ed7d845e56f4fb62278554b6c9de3a8..f68c2bea1fb329e8918131211dbd034b6dd3e5b3 100644
--- a/core/modules/migrate/tests/src/Unit/destination/EntityRevisionTest.php
+++ b/core/modules/migrate/tests/src/Unit/destination/EntityRevisionTest.php
@@ -212,7 +212,7 @@ public function getEntity(Row $row, array $old_destination_id_values) {
   /**
    * Allow public access for testing.
    */
-  public function save(ContentEntityInterface $entity, array $old_destination_id_values = array()) {
+  public function save(ContentEntityInterface $entity, array $old_destination_id_values = []) {
     return parent::save($entity, $old_destination_id_values);
   }
 
diff --git a/core/modules/migrate/tests/src/Unit/destination/PerComponentEntityDisplayTest.php b/core/modules/migrate/tests/src/Unit/destination/PerComponentEntityDisplayTest.php
index 4782dc0f4ada3c07294e7272730ec62962371426..6deaec8824926aee8963f62146e0b656f4b156ae 100644
--- a/core/modules/migrate/tests/src/Unit/destination/PerComponentEntityDisplayTest.php
+++ b/core/modules/migrate/tests/src/Unit/destination/PerComponentEntityDisplayTest.php
@@ -22,13 +22,13 @@ class PerComponentEntityDisplayTest extends MigrateTestCase {
    * Tests the entity display import method.
    */
   public function testImport() {
-    $values = array(
+    $values = [
       'entity_type' => 'entity_type_test',
       'bundle' => 'bundle_test',
       'view_mode' => 'view_mode_test',
       'field_name' => 'field_name_test',
-      'options' => array('test setting'),
-    );
+      'options' => ['test setting'],
+    ];
     $row = new Row();
     foreach ($values as $key => $value) {
       $row->setDestinationProperty($key, $value);
@@ -38,14 +38,14 @@ public function testImport() {
       ->getMock();
     $entity->expects($this->once())
       ->method('setComponent')
-      ->with('field_name_test', array('test setting'))
+      ->with('field_name_test', ['test setting'])
       ->will($this->returnSelf());
     $entity->expects($this->once())
       ->method('save')
       ->with();
     $plugin = new TestPerComponentEntityDisplay($entity);
-    $this->assertSame($plugin->import($row), array('entity_type_test', 'bundle_test', 'view_mode_test', 'field_name_test'));
-    $this->assertSame($plugin->getTestValues(), array('entity_type_test', 'bundle_test', 'view_mode_test'));
+    $this->assertSame($plugin->import($row), ['entity_type_test', 'bundle_test', 'view_mode_test', 'field_name_test']);
+    $this->assertSame($plugin->getTestValues(), ['entity_type_test', 'bundle_test', 'view_mode_test']);
   }
 
 }
diff --git a/core/modules/migrate/tests/src/Unit/destination/PerComponentEntityFormDisplayTest.php b/core/modules/migrate/tests/src/Unit/destination/PerComponentEntityFormDisplayTest.php
index 50cdbf6dc62946c9f49e84fd0f68d76e51e2ad15..0424cebf07ffd165a3811e798c3ae420bbddad07 100644
--- a/core/modules/migrate/tests/src/Unit/destination/PerComponentEntityFormDisplayTest.php
+++ b/core/modules/migrate/tests/src/Unit/destination/PerComponentEntityFormDisplayTest.php
@@ -22,13 +22,13 @@ class PerComponentEntityFormDisplayTest extends MigrateTestCase {
    * Tests the entity display import method.
    */
   public function testImport() {
-    $values = array(
+    $values = [
       'entity_type' => 'entity_type_test',
       'bundle' => 'bundle_test',
       'form_mode' => 'form_mode_test',
       'field_name' => 'field_name_test',
-      'options' => array('test setting'),
-    );
+      'options' => ['test setting'],
+    ];
     $row = new Row();
     foreach ($values as $key => $value) {
       $row->setDestinationProperty($key, $value);
@@ -38,14 +38,14 @@ public function testImport() {
       ->getMock();
     $entity->expects($this->once())
       ->method('setComponent')
-      ->with('field_name_test', array('test setting'))
+      ->with('field_name_test', ['test setting'])
       ->will($this->returnSelf());
     $entity->expects($this->once())
       ->method('save')
       ->with();
     $plugin = new TestPerComponentEntityFormDisplay($entity);
-    $this->assertSame($plugin->import($row), array('entity_type_test', 'bundle_test', 'form_mode_test', 'field_name_test'));
-    $this->assertSame($plugin->getTestValues(), array('entity_type_test', 'bundle_test', 'form_mode_test'));
+    $this->assertSame($plugin->import($row), ['entity_type_test', 'bundle_test', 'form_mode_test', 'field_name_test']);
+    $this->assertSame($plugin->getTestValues(), ['entity_type_test', 'bundle_test', 'form_mode_test']);
   }
 
 }
diff --git a/core/modules/migrate/tests/src/Unit/process/CallbackTest.php b/core/modules/migrate/tests/src/Unit/process/CallbackTest.php
index 92d1f7c34183a1cdd356ca69397f7b5a4c666b46..e3b8f27708bd6e7d1251149762df3c2058eff8b7 100644
--- a/core/modules/migrate/tests/src/Unit/process/CallbackTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/CallbackTest.php
@@ -37,7 +37,7 @@ public function testCallbackWithFunction() {
    * Test callback with a class method as callable.
    */
   public function testCallbackWithClassMethod() {
-    $this->plugin->setCallable(array('\Drupal\Component\Utility\Unicode', 'strtolower'));
+    $this->plugin->setCallable(['\Drupal\Component\Utility\Unicode', 'strtolower']);
     $value = $this->plugin->transform('FooBar', $this->migrateExecutable, $this->row, 'destinationproperty');
     $this->assertSame($value, 'foobar');
   }
diff --git a/core/modules/migrate/tests/src/Unit/process/ConcatTest.php b/core/modules/migrate/tests/src/Unit/process/ConcatTest.php
index 1d0d4c3772c2303bec65948e5c92b52af58e42ff..cae7cc090f51de0560152a79c8fcbb125c45dac2 100644
--- a/core/modules/migrate/tests/src/Unit/process/ConcatTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/ConcatTest.php
@@ -28,7 +28,7 @@ protected function setUp() {
    * Test concat works without a delimiter.
    */
   public function testConcatWithoutDelimiter() {
-    $value = $this->plugin->transform(array('foo', 'bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $value = $this->plugin->transform(['foo', 'bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
     $this->assertSame($value, 'foobar');
   }
 
@@ -46,7 +46,7 @@ public function testConcatWithNonArray() {
    */
   public function testConcatWithDelimiter() {
     $this->plugin->setDelimiter('_');
-    $value = $this->plugin->transform(array('foo', 'bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $value = $this->plugin->transform(['foo', 'bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
     $this->assertSame($value, 'foo_bar');
   }
 
diff --git a/core/modules/migrate/tests/src/Unit/process/DedupeEntityTest.php b/core/modules/migrate/tests/src/Unit/process/DedupeEntityTest.php
index 2aec300f3693e31e3f18d1be641d63e23e36d0c7..8f412fd055f8f2d2541f460375bae9608b57af46 100644
--- a/core/modules/migrate/tests/src/Unit/process/DedupeEntityTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/DedupeEntityTest.php
@@ -34,9 +34,9 @@ class DedupeEntityTest extends MigrateProcessTestCase {
    *
    * @var array
    */
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -64,16 +64,16 @@ protected function setUp() {
    * @dataProvider providerTestDedupe
    */
   public function testDedupe($count, $postfix = '', $start = NULL, $length = NULL) {
-    $configuration = array(
+    $configuration = [
       'entity_type' => 'test_entity_type',
       'field' => 'test_field',
-    );
+    ];
     if ($postfix) {
       $configuration['postfix'] = $postfix;
     }
     $configuration['start'] = isset($start) ? $start : NULL;
     $configuration['length'] = isset($length) ? $length : NULL;
-    $plugin = new DedupeEntity($configuration, 'dedupe_entity', array(), $this->getMigration(), $this->entityTypeManager);
+    $plugin = new DedupeEntity($configuration, 'dedupe_entity', [], $this->getMigration(), $this->entityTypeManager);
     $this->entityQueryExpects($count);
     $value = $this->randomMachineName(32);
     $actual = $plugin->transform($value, $this->migrateExecutable, $this->row, 'testproperty');
@@ -86,12 +86,12 @@ public function testDedupe($count, $postfix = '', $start = NULL, $length = NULL)
    * Tests that invalid start position throws an exception.
    */
   public function testDedupeEntityInvalidStart() {
-    $configuration = array(
+    $configuration = [
       'entity_type' => 'test_entity_type',
       'field' => 'test_field',
       'start' => 'foobar',
-    );
-    $plugin = new DedupeEntity($configuration, 'dedupe_entity', array(), $this->getMigration(), $this->entityTypeManager);
+    ];
+    $plugin = new DedupeEntity($configuration, 'dedupe_entity', [], $this->getMigration(), $this->entityTypeManager);
     $this->setExpectedException('Drupal\migrate\MigrateException', 'The start position configuration key should be an integer. Omit this key to capture from the beginning of the string.');
     $plugin->transform('test_start', $this->migrateExecutable, $this->row, 'testproperty');
   }
@@ -100,12 +100,12 @@ public function testDedupeEntityInvalidStart() {
    * Tests that invalid length option throws an exception.
    */
   public function testDedupeEntityInvalidLength() {
-    $configuration = array(
+    $configuration = [
       'entity_type' => 'test_entity_type',
       'field' => 'test_field',
       'length' => 'foobar',
-    );
-    $plugin = new DedupeEntity($configuration, 'dedupe_entity', array(), $this->getMigration(), $this->entityTypeManager);
+    ];
+    $plugin = new DedupeEntity($configuration, 'dedupe_entity', [], $this->getMigration(), $this->entityTypeManager);
     $this->setExpectedException('Drupal\migrate\MigrateException', 'The character length configuration key should be an integer. Omit this key to capture the entire string.');
     $plugin->transform('test_length', $this->migrateExecutable, $this->row, 'testproperty');
   }
@@ -114,40 +114,40 @@ public function testDedupeEntityInvalidLength() {
    * Data provider for testDedupe().
    */
   public function providerTestDedupe() {
-    return array(
+    return [
       // Tests no duplication.
-      array(0),
+      [0],
       // Tests no duplication and start position.
-      array(0, NULL, 10),
+      [0, NULL, 10],
       // Tests no duplication, start position, and length.
-      array(0, NULL, 5, 10),
+      [0, NULL, 5, 10],
       // Tests no duplication and length.
-      array(0, NULL, NULL, 10),
+      [0, NULL, NULL, 10],
       // Tests duplication.
-      array(3),
+      [3],
       // Tests duplication and start position.
-      array(3, NULL, 10),
+      [3, NULL, 10],
       // Tests duplication, start position, and length.
-      array(3, NULL, 5, 10),
+      [3, NULL, 5, 10],
       // Tests duplication and length.
-      array(3, NULL, NULL, 10),
+      [3, NULL, NULL, 10],
       // Tests no duplication and postfix.
-      array(0, '_'),
+      [0, '_'],
       // Tests no duplication, postfix, and start position.
-      array(0, '_', 5),
+      [0, '_', 5],
       // Tests no duplication, postfix, start position, and length.
-      array(0, '_', 5, 10),
+      [0, '_', 5, 10],
       // Tests no duplication, postfix, and length.
-      array(0, '_', NULL, 10),
+      [0, '_', NULL, 10],
       // Tests duplication and postfix.
-      array(2, '_'),
+      [2, '_'],
       // Tests duplication, postfix, and start position.
-      array(2, '_', 5),
+      [2, '_', 5],
       // Tests duplication, postfix, start position, and length.
-      array(2, '_', 5, 10),
+      [2, '_', 5, 10],
       // Tests duplication, postfix, and length.
-      array(2, '_', NULL, 10),
-    );
+      [2, '_', NULL, 10],
+    ];
   }
 
   /**
@@ -172,12 +172,12 @@ protected function entityQueryExpects($count) {
    * Test deduplicating only migrated entities.
    */
   public function testDedupeMigrated() {
-    $configuration = array(
+    $configuration = [
       'entity_type' => 'test_entity_type',
       'field' => 'test_field',
       'migrated' => TRUE,
-    );
-    $plugin = new DedupeEntity($configuration, 'dedupe_entity', array(), $this->getMigration(), $this->entityTypeManager);
+    ];
+    $plugin = new DedupeEntity($configuration, 'dedupe_entity', [], $this->getMigration(), $this->entityTypeManager);
 
     // Setup the entityQuery used in DedupeEntity::exists. The map, $map, is
     // an array consisting of the four input parameters to the query condition
diff --git a/core/modules/migrate/tests/src/Unit/process/ExtractTest.php b/core/modules/migrate/tests/src/Unit/process/ExtractTest.php
index 26c2cfe2539b24c4a1921a0af9cba0b4b82bf131..d030a07aef79c264fc145bbd4795cd996a8f8d9d 100644
--- a/core/modules/migrate/tests/src/Unit/process/ExtractTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/ExtractTest.php
@@ -14,8 +14,8 @@ class ExtractTest extends MigrateProcessTestCase {
    * {@inheritdoc}
    */
   protected function setUp() {
-    $configuration['index'] = array('foo');
-    $this->plugin = new Extract($configuration, 'map', array());
+    $configuration['index'] = ['foo'];
+    $this->plugin = new Extract($configuration, 'map', []);
     parent::setUp();
   }
 
@@ -23,7 +23,7 @@ protected function setUp() {
    * Tests successful extraction.
    */
   public function testExtract() {
-    $value = $this->plugin->transform(array('foo' => 'bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $value = $this->plugin->transform(['foo' => 'bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
     $this->assertSame($value, 'bar');
   }
 
@@ -44,7 +44,7 @@ public function testExtractFromString() {
    * @expectedExceptionMessage Array index missing, extraction failed.
    */
   public function testExtractFail() {
-    $this->plugin->transform(array('bar' => 'foo'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->plugin->transform(['bar' => 'foo'], $this->migrateExecutable, $this->row, 'destinationproperty');
   }
 
   /**
diff --git a/core/modules/migrate/tests/src/Unit/process/FlattenTest.php b/core/modules/migrate/tests/src/Unit/process/FlattenTest.php
index 52c19be293215bb0db998f08403f9f543ef91b82..484cfc78d258e199be34b7a94efa42fbc6599d82 100644
--- a/core/modules/migrate/tests/src/Unit/process/FlattenTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/FlattenTest.php
@@ -15,9 +15,9 @@ class FlattenTest extends MigrateProcessTestCase {
    * Test that various array flatten operations work properly.
    */
   public function testFlatten() {
-    $plugin = new Flatten(array(), 'flatten', array());
-    $flattened = $plugin->transform(array(1, 2, array(3, 4, array(5)), array(), array(7, 8)), $this->migrateExecutable, $this->row, 'destinationproperty');
-    $this->assertSame($flattened, array(1, 2, 3, 4, 5, 7, 8));
+    $plugin = new Flatten([], 'flatten', []);
+    $flattened = $plugin->transform([1, 2, [3, 4, [5]], [], [7, 8]], $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->assertSame($flattened, [1, 2, 3, 4, 5, 7, 8]);
   }
 
 }
diff --git a/core/modules/migrate/tests/src/Unit/process/GetTest.php b/core/modules/migrate/tests/src/Unit/process/GetTest.php
index ae24d98c7ee224fc2ef0f32389b9265e46bc0a4a..01ab2da74d2db11391940aa75164877400cd7ad7 100644
--- a/core/modules/migrate/tests/src/Unit/process/GetTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/GetTest.php
@@ -41,16 +41,16 @@ public function testTransformSourceString() {
    * Tests the Get plugin when source is an array.
    */
   public function testTransformSourceArray() {
-    $map = array(
+    $map = [
       'test1' => 'source_value1',
       'test2' => 'source_value2',
-    );
-    $this->plugin->setSource(array('test1', 'test2'));
+    ];
+    $this->plugin->setSource(['test1', 'test2']);
     $this->row->expects($this->exactly(2))
       ->method('getSourceProperty')
       ->will($this->returnCallback(function ($argument)  use ($map) { return $map[$argument]; } ));
     $value = $this->plugin->transform(NULL, $this->migrateExecutable, $this->row, 'destinationproperty');
-    $this->assertSame($value, array('source_value1', 'source_value2'));
+    $this->assertSame($value, ['source_value1', 'source_value2']);
   }
 
   /**
@@ -70,18 +70,18 @@ public function testTransformSourceStringAt() {
    * Tests the Get plugin when source is an array pointing to destination.
    */
   public function testTransformSourceArrayAt() {
-    $map = array(
+    $map = [
       'test1' => 'source_value1',
       '@test2' => 'source_value2',
       '@test3' => 'source_value3',
       'test4' => 'source_value4',
-    );
-    $this->plugin->setSource(array('test1', '@@test2', '@@test3', 'test4'));
+    ];
+    $this->plugin->setSource(['test1', '@@test2', '@@test3', 'test4']);
     $this->row->expects($this->exactly(4))
       ->method('getSourceProperty')
       ->will($this->returnCallback(function ($argument)  use ($map) { return $map[$argument]; } ));
     $value = $this->plugin->transform(NULL, $this->migrateExecutable, $this->row, 'destinationproperty');
-    $this->assertSame($value, array('source_value1', 'source_value2', 'source_value3', 'source_value4'));
+    $this->assertSame($value, ['source_value1', 'source_value2', 'source_value3', 'source_value4']);
   }
 
   /**
diff --git a/core/modules/migrate/tests/src/Unit/process/IteratorTest.php b/core/modules/migrate/tests/src/Unit/process/IteratorTest.php
index cdffac07ae8a92027b28c41784ce5e819a6ea423..993fb928497b5a4c9bc5c780b9f38892c357a028 100644
--- a/core/modules/migrate/tests/src/Unit/process/IteratorTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/IteratorTest.php
@@ -25,9 +25,9 @@ class IteratorTest extends MigrateTestCase {
   /**
    * @var array
    */
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-  );
+  ];
 
   /**
    * Tests the iterator process plugin.
@@ -35,24 +35,24 @@ class IteratorTest extends MigrateTestCase {
   public function testIterator() {
     $migration = $this->getMigration();
     // Set up the properties for the iterator.
-    $configuration = array(
-      'process' => array(
+    $configuration = [
+      'process' => [
         'foo' => 'source_foo',
         'id' => 'source_id',
-      ),
+      ],
       'key' => '@id',
-    );
-    $plugin = new Iterator($configuration, 'iterator', array());
+    ];
+    $plugin = new Iterator($configuration, 'iterator', []);
     // Manually create the plugins. Migration::getProcessPlugins does this
     // normally but the plugin system is not available.
     foreach ($configuration['process'] as $destination => $source) {
-      $iterator_plugins[$destination][] = new Get(array('source' => $source), 'get', array());
+      $iterator_plugins[$destination][] = new Get(['source' => $source], 'get', []);
     }
     $migration->expects($this->at(1))
       ->method('getProcessPlugins')
       ->will($this->returnValue($iterator_plugins));
     // Set up the key plugins.
-    $key_plugin['key'][] = new Get(array('source' => '@id'), 'get', array());
+    $key_plugin['key'][] = new Get(['source' => '@id'], 'get', []);
     $migration->expects($this->at(2))
       ->method('getProcessPlugins')
       ->will($this->returnValue($key_plugin));
@@ -60,12 +60,12 @@ public function testIterator() {
     $migrate_executable = new MigrateExecutable($migration, $this->getMock('Drupal\migrate\MigrateMessageInterface'), $event_dispatcher);
 
     // The current value of the pipeline.
-    $current_value = array(
-      array(
+    $current_value = [
+      [
         'source_foo' => 'test',
         'source_id' => 42,
-      ),
-    );
+      ],
+    ];
     // This is not used but the interface requires it, so create an empty row.
     $row = new Row();
 
diff --git a/core/modules/migrate/tests/src/Unit/process/MachineNameTest.php b/core/modules/migrate/tests/src/Unit/process/MachineNameTest.php
index 7f44157f37f825b86bfe807087b68368b1825ab0..5bc91587bbaa591c7f82dd59e96d59f49637f533 100644
--- a/core/modules/migrate/tests/src/Unit/process/MachineNameTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/MachineNameTest.php
@@ -53,7 +53,7 @@ public function testMachineNames() {
       ->with($human_name)
       ->will($this->returnValue($human_name_ascii . 'aeo'));
 
-    $plugin = new MachineName(array(), 'machine_name', array(), $this->transliteration);
+    $plugin = new MachineName([], 'machine_name', [], $this->transliteration);
     $value = $plugin->transform($human_name, $this->migrateExecutable, $this->row, 'destinationproperty');
     $this->assertEquals($expected_result, $value);
   }
diff --git a/core/modules/migrate/tests/src/Unit/process/StaticMapTest.php b/core/modules/migrate/tests/src/Unit/process/StaticMapTest.php
index 59db2e5780d290b65ff59be462c78b6c75cbd715..5a8de135f2b5d8f85c052dd56f39650a6f8fd346 100644
--- a/core/modules/migrate/tests/src/Unit/process/StaticMapTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/StaticMapTest.php
@@ -16,7 +16,7 @@ class StaticMapTest extends MigrateProcessTestCase {
    */
   protected function setUp() {
     $configuration['map']['foo']['bar'] = 'baz';
-    $this->plugin = new StaticMap($configuration, 'map', array());
+    $this->plugin = new StaticMap($configuration, 'map', []);
     parent::setUp();
   }
 
@@ -25,14 +25,14 @@ protected function setUp() {
    */
   public function testMapWithSourceString() {
     $value = $this->plugin->transform('foo', $this->migrateExecutable, $this->row, 'destinationproperty');
-    $this->assertSame($value, array('bar' => 'baz'));
+    $this->assertSame($value, ['bar' => 'baz']);
   }
 
   /**
    * Tests map when the source is a list.
    */
   public function testMapWithSourceList() {
-    $value = $this->plugin->transform(array('foo', 'bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $value = $this->plugin->transform(['foo', 'bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
     $this->assertSame($value, 'baz');
   }
 
@@ -42,7 +42,7 @@ public function testMapWithSourceList() {
    * @expectedException \Drupal\migrate\MigrateException
    */
   public function testMapwithEmptySource() {
-    $this->plugin->transform(array(), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->plugin->transform([], $this->migrateExecutable, $this->row, 'destinationproperty');
   }
 
   /**
@@ -51,7 +51,7 @@ public function testMapwithEmptySource() {
    * @expectedException \Drupal\migrate\MigrateSkipRowException
    */
   public function testMapwithInvalidSource() {
-    $this->plugin->transform(array('bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->plugin->transform(['bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
   }
 
   /**
@@ -60,8 +60,8 @@ public function testMapwithInvalidSource() {
   public function testMapWithInvalidSourceWithADefaultValue() {
     $configuration['map']['foo']['bar'] = 'baz';
     $configuration['default_value'] = 'test';
-    $this->plugin = new StaticMap($configuration, 'map', array());
-    $value = $this->plugin->transform(array('bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->plugin = new StaticMap($configuration, 'map', []);
+    $value = $this->plugin->transform(['bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
     $this->assertSame($value, 'test');
   }
 
@@ -72,7 +72,7 @@ public function testMapWithInvalidSourceWithANullDefaultValue() {
     $configuration['map']['foo']['bar'] = 'baz';
     $configuration['default_value'] = NULL;
     $this->plugin = new StaticMap($configuration, 'map', []);
-    $value = $this->plugin->transform(array('bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $value = $this->plugin->transform(['bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
     $this->assertNull($value);
   }
 
@@ -86,8 +86,8 @@ public function testMapWithInvalidSourceAndBypass() {
     $configuration['map']['foo']['bar'] = 'baz';
     $configuration['default_value'] = 'test';
     $configuration['bypass'] = TRUE;
-    $this->plugin = new StaticMap($configuration, 'map', array());
-    $this->plugin->transform(array('bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->plugin = new StaticMap($configuration, 'map', []);
+    $this->plugin->transform(['bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
   }
 
 }
diff --git a/core/modules/migrate/tests/src/Unit/process/UrlEncodeTest.php b/core/modules/migrate/tests/src/Unit/process/UrlEncodeTest.php
index 78d89a16e11d5715cb5a70540c7beeaea6b84013..1f7d94ae0d5f2b39d5ff3b9a4710c5eb37aecfc9 100644
--- a/core/modules/migrate/tests/src/Unit/process/UrlEncodeTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/UrlEncodeTest.php
@@ -28,14 +28,14 @@ class UrlEncodeTest extends MigrateTestCase {
    *   An array of URLs to test.
    */
   public function urlDataProvider() {
-    return array(
-      'A URL with no characters requiring encoding' => array('http://example.com/normal_url.html', 'http://example.com/normal_url.html'),
-      'The definitive use case - encoding spaces in URLs' => array('http://example.com/url with spaces.html', 'http://example.com/url%20with%20spaces.html'),
-      'Definitive use case 2 - spaces in directories' => array('http://example.com/dir with spaces/foo.html', 'http://example.com/dir%20with%20spaces/foo.html'),
-      'Local filespecs without spaces should not be transformed' => array('/tmp/normal.txt', '/tmp/normal.txt'),
-      'Local filespecs with spaces should not be transformed' => array('/tmp/with spaces.txt', '/tmp/with spaces.txt'),
-      'Make sure URL characters (:, ?, &) are not encoded but others are.' => array('https://example.com/?a=b@c&d=e+f%', 'https://example.com/?a%3Db%40c&d%3De%2Bf%25'),
-    );
+    return [
+      'A URL with no characters requiring encoding' => ['http://example.com/normal_url.html', 'http://example.com/normal_url.html'],
+      'The definitive use case - encoding spaces in URLs' => ['http://example.com/url with spaces.html', 'http://example.com/url%20with%20spaces.html'],
+      'Definitive use case 2 - spaces in directories' => ['http://example.com/dir with spaces/foo.html', 'http://example.com/dir%20with%20spaces/foo.html'],
+      'Local filespecs without spaces should not be transformed' => ['/tmp/normal.txt', '/tmp/normal.txt'],
+      'Local filespecs with spaces should not be transformed' => ['/tmp/with spaces.txt', '/tmp/with spaces.txt'],
+      'Make sure URL characters (:, ?, &) are not encoded but others are.' => ['https://example.com/?a=b@c&d=e+f%', 'https://example.com/?a%3Db%40c&d%3De%2Bf%25'],
+    ];
   }
 
   /**
diff --git a/core/modules/migrate_drupal/migrate_drupal.module b/core/modules/migrate_drupal/migrate_drupal.module
index dc3ab4ee75a87bcce9bacd52ec3a3646291c6f14..9b00e07eb1155c5ad5ac8c619eefb888df4f98c9 100644
--- a/core/modules/migrate_drupal/migrate_drupal.module
+++ b/core/modules/migrate_drupal/migrate_drupal.module
@@ -20,7 +20,7 @@ function migrate_drupal_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.migrate_drupal':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Migrate Drupal module provides a framework based on the <a href=":migrate">Migrate module</a> to facilitate migration from a Drupal (6, 7, or 8) site to your website. It does not provide a user interface. For more information, see the <a href=":migrate_drupal">online documentation for the Migrate Drupal module</a>.', array(':migrate' => \Drupal::url('help.page', array('name' => 'migrate')), ':migrate_drupal' => 'https://www.drupal.org/documentation/modules/migrate_drupal')) . '</p>';
+      $output .= '<p>' . t('The Migrate Drupal module provides a framework based on the <a href=":migrate">Migrate module</a> to facilitate migration from a Drupal (6, 7, or 8) site to your website. It does not provide a user interface. For more information, see the <a href=":migrate_drupal">online documentation for the Migrate Drupal module</a>.', [':migrate' => \Drupal::url('help.page', ['name' => 'migrate']), ':migrate_drupal' => 'https://www.drupal.org/documentation/modules/migrate_drupal']) . '</p>';
       return $output;
   }
 }
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php b/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
index 3c3624d197945e2f2201f82b5b4fd36f741d7fcf..ffff6269cd6596032ccd48521a60ccfebd857253 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
@@ -59,7 +59,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    */
   public function getSystemData() {
     if (!isset($this->systemData)) {
-      $this->systemData = array();
+      $this->systemData = [];
       try {
         $results = $this->select('system', 's')
           ->fields('s')
@@ -149,7 +149,7 @@ protected function moduleExists($module) {
   protected function variableGet($name, $default) {
     try {
       $result = $this->select('variable', 'v')
-        ->fields('v', array('value'))
+        ->fields('v', ['value'])
         ->condition('name', $name)
         ->execute()
         ->fetchField();
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/source/Variable.php b/core/modules/migrate_drupal/src/Plugin/migrate/source/Variable.php
index 2d8c3ccd8fb81dcd42f561bba8483f5d7409a319..410acec229cff80481fe94f4a5236794c1ace785 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/source/Variable.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/source/Variable.php
@@ -37,7 +37,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    * {@inheritdoc}
    */
   protected function initializeIterator() {
-    return new \ArrayIterator(array($this->values()));
+    return new \ArrayIterator([$this->values()]);
   }
 
   /**
@@ -75,7 +75,7 @@ public function fields() {
   public function query() {
     return $this->getDatabase()
       ->select('variable', 'v')
-      ->fields('v', array('name', 'value'))
+      ->fields('v', ['name', 'value'])
       ->condition('name', $this->variables, 'IN');
   }
 
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/source/VariableMultiRow.php b/core/modules/migrate_drupal/src/Plugin/migrate/source/VariableMultiRow.php
index 2ecea8d22ab98307af8a9d3e385c2d5d1b123504..61da5eb30a1dcd69566dfe3e44f1b7f567a380e1 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/source/VariableMultiRow.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/source/VariableMultiRow.php
@@ -21,7 +21,7 @@ class VariableMultiRow extends DrupalSqlBase {
    */
   public function query() {
     return $this->select('variable', 'v')
-      ->fields('v', array('name', 'value'))
+      ->fields('v', ['name', 'value'])
       // Cast scalars to array so we can consistently use an IN condition.
       ->condition('name', (array) $this->configuration['variables'], 'IN');
   }
@@ -30,10 +30,10 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'name' => $this->t('Name'),
       'value' => $this->t('Value'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/source/d8/Config.php b/core/modules/migrate_drupal/src/Plugin/migrate/source/d8/Config.php
index df3311f5fcd88c7e51da6cbd19187d97e15aaae5..8d8338776db102487853b17eb2b6c8f0edb57372 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/source/d8/Config.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/source/d8/Config.php
@@ -19,7 +19,7 @@ class Config extends DrupalSqlBase {
    */
   public function query() {
     $query = $this->select('config', 'c')
-      ->fields('c', array('collection', 'name', 'data'));
+      ->fields('c', ['collection', 'name', 'data']);
     if (!empty($this->configuration['collections'])) {
       $query->condition('collection', (array) $this->configuration['collections'], 'IN');
     }
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/MigrateCckFieldPluginManagerTest.php b/core/modules/migrate_drupal/tests/src/Kernel/MigrateCckFieldPluginManagerTest.php
index 1754cfef5171e00b2707db4b1f8f1178c203c590..9e30795be1ef40bddd4d211f4166c96dad9f76cc 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/MigrateCckFieldPluginManagerTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/MigrateCckFieldPluginManagerTest.php
@@ -14,7 +14,7 @@ class MigrateCckFieldPluginManagerTest extends MigrateDrupalTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('system', 'user', 'field', 'migrate_drupal', 'options', 'file', 'text', 'migrate_cckfield_plugin_manager_test');
+  public static $modules = ['system', 'user', 'field', 'migrate_drupal', 'options', 'file', 'text', 'migrate_cckfield_plugin_manager_test'];
 
   /**
    * Tests that the correct MigrateCckField plugins are used.
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/MigrateDrupalTestBase.php b/core/modules/migrate_drupal/tests/src/Kernel/MigrateDrupalTestBase.php
index 2cf4eb14aaa23e2c4808ba6875b88b42389f274c..063c99cb36473f234336648ed0f4515a5d20f400 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/MigrateDrupalTestBase.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/MigrateDrupalTestBase.php
@@ -15,7 +15,7 @@ abstract class MigrateDrupalTestBase extends MigrateTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field', 'migrate_drupal', 'options', 'file');
+  public static $modules = ['system', 'user', 'field', 'migrate_drupal', 'options', 'file'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/d6/EntityContentBaseTest.php b/core/modules/migrate_drupal/tests/src/Kernel/d6/EntityContentBaseTest.php
index 5074473cecb3fd8b46789a199ca440af19c66ad9..9c5ee58f2c2b79ef699f3ed6d5b9834e4a21f1ff 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/d6/EntityContentBaseTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/d6/EntityContentBaseTest.php
@@ -44,12 +44,12 @@ protected function setUp() {
       'uid' => 2,
       'name' => 'Ford Prefect',
       'mail' => 'ford.prefect@localhost',
-      'signature' => array(
-        array(
+      'signature' => [
+        [
           'value' => 'Bring a towel.',
           'format' => 'filtered_html',
-        ),
-      ),
+        ],
+      ],
       'init' => 'proto@zo.an',
     ])->save();
 
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/dependencies/MigrateDependenciesTest.php b/core/modules/migrate_drupal/tests/src/Kernel/dependencies/MigrateDependenciesTest.php
index 1b5736d921678cd10dd19c418fc5e5e6d68e91c5..ba0dc5a470b880c34f7e8db9903e691372e2ebee 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/dependencies/MigrateDependenciesTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/dependencies/MigrateDependenciesTest.php
@@ -22,11 +22,11 @@ class MigrateDependenciesTest extends MigrateDrupal6TestBase {
    * Tests that the order is correct when loading several migrations.
    */
   public function testMigrateDependenciesOrder() {
-    $migration_items = array('d6_comment', 'd6_filter_format', 'd6_node:page');
+    $migration_items = ['d6_comment', 'd6_filter_format', 'd6_node:page'];
     $migrations = $this->container->get('plugin.manager.migration')->createInstances($migration_items);
-    $expected_order = array('d6_filter_format', 'd6_node:page', 'd6_comment');
+    $expected_order = ['d6_filter_format', 'd6_node:page', 'd6_comment'];
     $this->assertIdentical(array_keys($migrations), $expected_order);
-    $expected_requirements = array(
+    $expected_requirements = [
       // d6_comment depends on d6_node:*, which the deriver expands into every
       // variant of d6_node.
       'd6_node:article',
@@ -47,7 +47,7 @@ public function testMigrateDependenciesOrder() {
       'd6_comment_type',
       'd6_comment_entity_display',
       'd6_comment_entity_form_display',
-    );
+    ];
     // Migration dependencies for comment include dependencies for node
     // migration as well.
     $actual_requirements = $migrations['d6_comment']->get('requirements');
@@ -66,7 +66,7 @@ public function testAggregatorMigrateDependencies() {
     $executable = new MigrateExecutable($migration, $this);
     $this->startCollectingMessages();
     $executable->import();
-    $this->assertEqual($this->migrateMessages['error'], array(SafeMarkup::format('Migration @id did not meet the requirements. Missing migrations d6_aggregator_feed. requirements: d6_aggregator_feed.', array('@id' => $migration->id()))));
+    $this->assertEqual($this->migrateMessages['error'], [SafeMarkup::format('Migration @id did not meet the requirements. Missing migrations d6_aggregator_feed. requirements: d6_aggregator_feed.', ['@id' => $migration->id()])]);
     $this->collectMessages = FALSE;
   }
 
diff --git a/core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php b/core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php
index f2254dc4ac804ac8c065dc3588ef4d6a081d18f0..6dd5925748871e8447f5b05589a8f833e6fbcf8b 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php
@@ -14,9 +14,9 @@ class DrupalSqlBaseTest extends MigrateTestCase {
   /**
    * Define bare minimum migration configuration.
    */
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'DrupalSqlBase',
-  );
+  ];
 
   /**
    * @var \Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase
@@ -26,17 +26,17 @@ class DrupalSqlBaseTest extends MigrateTestCase {
   /**
    * Minimum database contents needed to test DrupalSqlBase.
    */
-  protected $databaseContents = array(
-    'system' => array(
-      array(
+  protected $databaseContents = [
+    'system' => [
+      [
         'filename' => 'sites/all/modules/module1',
         'name' => 'module1',
         'type' => 'module',
         'status' => 0,
         'schema_version' => -1,
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   /**
    * @covers ::checkRequirements
diff --git a/core/modules/migrate_drupal/tests/src/Unit/source/VariableMultiRowTestBase.php b/core/modules/migrate_drupal/tests/src/Unit/source/VariableMultiRowTestBase.php
index c9af613c9cd459727eadfb80c3a3fcd3f059ab4d..5710436221dc4d8f484785960aa5314e7532644a 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/source/VariableMultiRowTestBase.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/source/VariableMultiRowTestBase.php
@@ -14,27 +14,27 @@ abstract class VariableMultiRowTestBase extends MigrateSqlSourceTestCase {
   const PLUGIN_CLASS = 'Drupal\migrate_drupal\Plugin\migrate\source\VariableMultiRow';
 
   // The fake Migration configuration entity.
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-    'source' => array(
+    'source' => [
       'plugin' => 'd6_variable_multirow',
-      'variables' => array(
+      'variables' => [
         'foo',
         'bar',
-      ),
-    ),
-  );
-
-  protected $expectedResults = array(
-    array('name' => 'foo', 'value' => 1),
-    array('name' => 'bar', 'value' => FALSE),
-  );
-
-  protected $databaseContents = array(
-    'variable' => array(
-      array('name' => 'foo', 'value' => 'i:1;'),
-      array('name' => 'bar', 'value' => 'b:0;'),
-    ),
-  );
+      ],
+    ],
+  ];
+
+  protected $expectedResults = [
+    ['name' => 'foo', 'value' => 1],
+    ['name' => 'bar', 'value' => FALSE],
+  ];
+
+  protected $databaseContents = [
+    'variable' => [
+      ['name' => 'foo', 'value' => 'i:1;'],
+      ['name' => 'bar', 'value' => 'b:0;'],
+    ],
+  ];
 
 }
diff --git a/core/modules/migrate_drupal/tests/src/Unit/source/VariableTest.php b/core/modules/migrate_drupal/tests/src/Unit/source/VariableTest.php
index 18a30333e324d806f880eb0e3e4014999c160c6e..1b5abc36b01c84ccb7747ef03f7707aa2301b3c2 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/source/VariableTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/source/VariableTest.php
@@ -13,31 +13,31 @@ class VariableTest extends MigrateSqlSourceTestCase {
 
   const PLUGIN_CLASS = 'Drupal\migrate_drupal\Plugin\migrate\source\Variable';
 
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'test',
-    'highWaterProperty' => array('field' => 'test'),
-    'source' => array(
+    'highWaterProperty' => ['field' => 'test'],
+    'source' => [
       'plugin' => 'd6_variable',
-      'variables' => array(
+      'variables' => [
         'foo',
         'bar',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
-  protected $expectedResults = array(
-    array(
+  protected $expectedResults = [
+    [
       'id' => 'foo',
       'foo' => 1,
       'bar' => FALSE,
-    ),
-  );
-
-  protected $databaseContents = array(
-    'variable' => array(
-      array('name' => 'foo', 'value' => 'i:1;'),
-      array('name' => 'bar', 'value' => 'b:0;'),
-    ),
-  );
+    ],
+  ];
+
+  protected $databaseContents = [
+    'variable' => [
+      ['name' => 'foo', 'value' => 'i:1;'],
+      ['name' => 'bar', 'value' => 'b:0;'],
+    ],
+  ];
 
 }
diff --git a/core/modules/migrate_drupal/tests/src/Unit/source/d6/Drupal6SqlBaseTest.php b/core/modules/migrate_drupal/tests/src/Unit/source/d6/Drupal6SqlBaseTest.php
index 845ce786363e07d20b967a297850367ea4c8996b..55d128227d06355c09c3564575cb74b52245ba48 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/source/d6/Drupal6SqlBaseTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/source/d6/Drupal6SqlBaseTest.php
@@ -19,9 +19,9 @@ class Drupal6SqlBaseTest extends MigrateTestCase {
   /**
    * Define bare minimum migration configuration.
    */
-  protected $migrationConfiguration = array(
+  protected $migrationConfiguration = [
     'id' => 'Drupal6SqlBase',
-  );
+  ];
 
   /**
    * @var \Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase
@@ -31,37 +31,37 @@ class Drupal6SqlBaseTest extends MigrateTestCase {
   /**
    * Minimum database contents needed to test Drupal6SqlBase.
    */
-  protected $databaseContents = array(
-    'system' => array(
-      array(
+  protected $databaseContents = [
+    'system' => [
+      [
         'filename' => 'sites/all/modules/module1',
         'name' => 'module1',
         'type' => 'module',
         'status' => 1,
         'schema_version' => -1,
-      ),
-      array(
+      ],
+      [
         'filename' => 'sites/all/modules/module2',
         'name' => 'module2',
         'type' => 'module',
         'status' => 0,
         'schema_version' => 7201,
-      ),
-      array(
+      ],
+      [
         'filename' => 'sites/all/modules/test2',
         'name' => 'test2',
         'type' => 'theme',
         'status' => 1,
         'schema_version' => -1,
-      ),
-    ),
-    'variable' => array(
-      array(
+      ],
+    ],
+    'variable' => [
+      [
         'name' => 'my_variable',
         'value' => 'b:1;',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   /**
    * {@inheritdoc}
@@ -72,7 +72,7 @@ protected function setUp() {
     $state = $this->getMock('Drupal\Core\State\StateInterface');
     /** @var \Drupal\Core\Entity\EntityManagerInterface $entity_manager */
     $entity_manager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
-    $this->base = new TestDrupal6SqlBase($this->migrationConfiguration, $plugin, array(), $this->getMigration(), $state, $entity_manager);
+    $this->base = new TestDrupal6SqlBase($this->migrationConfiguration, $plugin, [], $this->getMigration(), $state, $entity_manager);
     $this->base->setDatabase($this->getDatabase($this->databaseContents));
   }
 
@@ -143,7 +143,7 @@ class TestDrupal6SqlBase extends DrupalSqlBase {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'filename' => t('The path of the primary file for this item.'),
       'name' => t('The name of the item; e.g. node.'),
       'type' => t('The type of the item, either module, theme, or theme_engine.'),
@@ -154,7 +154,7 @@ public function fields() {
       'schema_version' => t('The module\'s database schema version number.'),
       'weight' => t('The order in which this module\'s hooks should be invoked.'),
       'info' => t('A serialized array containing information from the module\'s .info file.'),
-    );
+    ];
   }
 
   /**
@@ -163,7 +163,7 @@ public function fields() {
   public function query() {
     $query = $this->database
       ->select('system', 's')
-      ->fields('s', array('filename', 'name', 'schema_version'));
+      ->fields('s', ['filename', 'name', 'schema_version']);
     return $query;
   }
 
@@ -216,7 +216,7 @@ public function variableGetWrapper($name, $default) {
    * {@inheritdoc}
    */
   public function getIds() {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/migrate_drupal/tests/src/Unit/source/d6/i18nVariableTest.php b/core/modules/migrate_drupal/tests/src/Unit/source/d6/i18nVariableTest.php
index bcfb6c2027e1f65a5f934d2a0940560ddff1f5a0..06059cfd53478adc9bb74775a30712bc0e9cffcf 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/source/d6/i18nVariableTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/source/d6/i18nVariableTest.php
@@ -20,7 +20,7 @@ class i18nVariableTest extends MigrateSqlSourceTestCase {
    */
   protected $migrationConfiguration = [
     'id' => 'test',
-    'highWaterProperty' => array('field' => 'test'),
+    'highWaterProperty' => ['field' => 'test'],
     'source' => [
       'plugin' => 'i18n_variable',
       'variables' => [
@@ -51,10 +51,10 @@ class i18nVariableTest extends MigrateSqlSourceTestCase {
    */
   protected $databaseContents = [
     'i18n_variable' => [
-      array('name' => 'site_slogan', 'language' => 'fr', 'value' => 's:19:"Migrate est génial";'),
-      array('name' => 'site_name', 'language' => 'fr', 'value' => 's:11:"nom de site";'),
-      array('name' => 'site_slogan', 'language' => 'mi', 'value' => 's:19:"Ko whakamataku heke";'),
-      array('name' => 'site_name', 'language' => 'mi', 'value' => 's:9:"ingoa_pae";'),
+      ['name' => 'site_slogan', 'language' => 'fr', 'value' => 's:19:"Migrate est génial";'],
+      ['name' => 'site_name', 'language' => 'fr', 'value' => 's:11:"nom de site";'],
+      ['name' => 'site_slogan', 'language' => 'mi', 'value' => 's:19:"Ko whakamataku heke";'],
+      ['name' => 'site_name', 'language' => 'mi', 'value' => 's:9:"ingoa_pae";'],
     ],
   ];
 
diff --git a/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php b/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
index 212a044c2dd38d8d5dca036c1bf60d31b70f024f..6b1fc1b398c2746e9da0267a61a833e4694ac1c0 100644
--- a/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
+++ b/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
@@ -1058,7 +1058,7 @@ public function buildConfirmForm(array $form, FormStateInterface $form_state) {
     $form['missing_module_list_title'] = [
       '#type' => 'item',
       '#title' => $this->t('Missing upgrade paths'),
-      '#description' => $this->t('The following items will not be upgraded. For more information see <a href=":migrate">Upgrading from Drupal 6 or 7 to Drupal 8</a>.', array(':migrate' => 'https://www.drupal.org/upgrade/migrate')),
+      '#description' => $this->t('The following items will not be upgraded. For more information see <a href=":migrate">Upgrading from Drupal 6 or 7 to Drupal 8</a>.', [':migrate' => 'https://www.drupal.org/upgrade/migrate']),
     ];
     $form['missing_module_list'] = [
       '#type' => 'table',
diff --git a/core/modules/node/node.admin.inc b/core/modules/node/node.admin.inc
index dc1be652653d4068f98c1d5c01de478d3779c539..fc637bd39f1ab8feda3f3dabec6ff0201ad6de5b 100644
--- a/core/modules/node/node.admin.inc
+++ b/core/modules/node/node.admin.inc
@@ -33,10 +33,10 @@ function node_mass_update(array $nodes, array $updates, $langcode = NULL, $load
   // We use batch processing to prevent timeout when updating a large number
   // of nodes.
   if (count($nodes) > 10) {
-    $batch = array(
-      'operations' => array(
-        array('_node_mass_update_batch_process', array($nodes, $updates, $langcode, $load, $revisions))
-      ),
+    $batch = [
+      'operations' => [
+        ['_node_mass_update_batch_process', [$nodes, $updates, $langcode, $load, $revisions]]
+      ],
       'finished' => '_node_mass_update_batch_finished',
       'title' => t('Processing'),
       // We use a single multi-pass operation, so the default
@@ -46,7 +46,7 @@ function node_mass_update(array $nodes, array $updates, $langcode = NULL, $load
       // The operations do not live in the .module file, so we need to
       // tell the batch engine which file to load before calling them.
       'file' => drupal_get_path('module', 'node') . '/node.admin.inc',
-    );
+    ];
     batch_set($batch);
   }
   else {
@@ -81,7 +81,7 @@ function node_mass_update(array $nodes, array $updates, $langcode = NULL, $load
  * @see node_mass_update()
  */
 function _node_mass_update_helper(NodeInterface $node, array $updates, $langcode = NULL) {
-  $langcodes = isset($langcode) ? array($langcode) : array_keys($node->getTranslationLanguages());
+  $langcodes = isset($langcode) ? [$langcode] : array_keys($node->getTranslationLanguages());
   // For efficiency manually save the original node before applying any changes.
   $node->original = clone $node;
   foreach ($langcodes as $langcode) {
@@ -169,10 +169,10 @@ function _node_mass_update_batch_finished($success, $results, $operations) {
   else {
     drupal_set_message(t('An error occurred and processing did not complete.'), 'error');
     $message = \Drupal::translation()->formatPlural(count($results), '1 item successfully processed:', '@count items successfully processed:');
-    $item_list = array(
+    $item_list = [
       '#theme' => 'item_list',
       '#items' => $results,
-    );
+    ];
     $message .= drupal_render($item_list);
     drupal_set_message($message);
   }
diff --git a/core/modules/node/node.api.php b/core/modules/node/node.api.php
index a4937f742147ad49e2027d17c11c43a1ae7b9d93..604187406bb52a512a3944ebc2ce97582061559c 100644
--- a/core/modules/node/node.api.php
+++ b/core/modules/node/node.api.php
@@ -81,10 +81,10 @@
  */
 function hook_node_grants(\Drupal\Core\Session\AccountInterface $account, $op) {
   if ($account->hasPermission('access private content')) {
-    $grants['example'] = array(1);
+    $grants['example'] = [1];
   }
   if ($account->id()) {
-    $grants['example_author'] = array($account->id());
+    $grants['example_author'] = [$account->id()];
   }
   return $grants;
 }
@@ -158,33 +158,33 @@ function hook_node_access_records(\Drupal\node\NodeInterface $node) {
   // We only care about the node if it has been marked private. If not, it is
   // treated just like any other node and we completely ignore it.
   if ($node->private->value) {
-    $grants = array();
+    $grants = [];
     // Only published Catalan translations of private nodes should be viewable
     // to all users. If we fail to check $node->isPublished(), all users would be able
     // to view an unpublished node.
     if ($node->isPublished()) {
-      $grants[] = array(
+      $grants[] = [
         'realm' => 'example',
         'gid' => 1,
         'grant_view' => 1,
         'grant_update' => 0,
         'grant_delete' => 0,
         'langcode' => 'ca'
-      );
+      ];
     }
     // For the example_author array, the GID is equivalent to a UID, which
     // means there are many groups of just 1 user.
     // Note that an author can always view his or her nodes, even if they
     // have status unpublished.
     if ($node->getOwnerId()) {
-      $grants[] = array(
+      $grants[] = [
         'realm' => 'example_author',
         'gid' => $node->getOwnerId(),
         'grant_view' => 1,
         'grant_update' => 1,
         'grant_delete' => 1,
         'langcode' => 'ca'
-      );
+      ];
     }
 
     return $grants;
@@ -231,7 +231,7 @@ function hook_node_access_records_alter(&$grants, Drupal\node\NodeInterface $nod
     // Our module grants are set in $grants['example'].
     $temp = $grants['example'];
     // Now remove all module grants but our own.
-    $grants = array('example' => $temp);
+    $grants = ['example' => $temp];
   }
 }
 
@@ -280,7 +280,7 @@ function hook_node_grants_alter(&$grants, \Drupal\Core\Session\AccountInterface
     // Now check the roles for this account against the restrictions.
     foreach ($account->getRoles() as $rid) {
       if (in_array($rid, $restricted)) {
-        $grants = array();
+        $grants = [];
       }
     }
   }
@@ -374,8 +374,8 @@ function hook_node_access(\Drupal\node\NodeInterface $node, $op, \Drupal\Core\Se
  * @ingroup entity_crud
  */
 function hook_node_search_result(\Drupal\node\NodeInterface $node) {
-  $rating = db_query('SELECT SUM(points) FROM {my_rating} WHERE nid = :nid', array('nid' => $node->id()))->fetchField();
-  return array('rating' => \Drupal::translation()->formatPlural($rating, '1 point', '@count points'));
+  $rating = db_query('SELECT SUM(points) FROM {my_rating} WHERE nid = :nid', ['nid' => $node->id()])->fetchField();
+  return ['rating' => \Drupal::translation()->formatPlural($rating, '1 point', '@count points')];
 }
 
 /**
@@ -394,7 +394,7 @@ function hook_node_search_result(\Drupal\node\NodeInterface $node) {
  */
 function hook_node_update_index(\Drupal\node\NodeInterface $node) {
   $text = '';
-  $ratings = db_query('SELECT title, description FROM {my_ratings} WHERE nid = :nid', array(':nid' => $node->id()));
+  $ratings = db_query('SELECT title, description FROM {my_ratings} WHERE nid = :nid', [':nid' => $node->id()]);
   foreach ($ratings as $rating) {
     $text .= '<h2>' . Html::escape($rating->title) . '</h2>' . Xss::filter($rating->description);
   }
@@ -447,24 +447,24 @@ function hook_node_update_index(\Drupal\node\NodeInterface $node) {
 function hook_ranking() {
   // If voting is disabled, we can avoid returning the array, no hard feelings.
   if (\Drupal::config('vote.settings')->get('node_enabled')) {
-    return array(
-      'vote_average' => array(
+    return [
+      'vote_average' => [
         'title' => t('Average vote'),
         // Note that we use i.sid, the search index's search item id, rather than
         // n.nid.
-        'join' => array(
+        'join' => [
           'type' => 'LEFT',
           'table' => 'vote_node_data',
           'alias' => 'vote_node_data',
           'on' => 'vote_node_data.nid = i.sid',
-        ),
+        ],
         // The highest possible score should be 1, and the lowest possible score,
         // always 0, should be 0.
         'score' => 'vote_node_data.average / CAST(%f AS DECIMAL)',
         // Pass in the highest possible voting score as a decimal argument.
-        'arguments' => array(\Drupal::config('vote.settings')->get('score_max')),
-      ),
-    );
+        'arguments' => [\Drupal::config('vote.settings')->get('score_max')],
+      ],
+    ];
   }
 }
 
@@ -486,16 +486,16 @@ function hook_ranking() {
  * @see entity_crud
  */
 function hook_node_links_alter(array &$links, NodeInterface $entity, array &$context) {
-  $links['mymodule'] = array(
+  $links['mymodule'] = [
     '#theme' => 'links__node__mymodule',
-    '#attributes' => array('class' => array('links', 'inline')),
-    '#links' => array(
-      'node-report' => array(
+    '#attributes' => ['class' => ['links', 'inline']],
+    '#links' => [
+      'node-report' => [
         'title' => t('Report'),
         'url' => Url::fromRoute('node_test.report', ['node' => $entity->id()], ['query' => ['token' => \Drupal::getContainer()->get('csrf_token')->get("node/{$entity->id()}/report")]]),
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/node/node.install b/core/modules/node/node.install
index 0582459da388978499f7412bc5132f5e110bac41..3aeff410bc3d36f9a151d98d3b84e55d21a318e6 100644
--- a/core/modules/node/node.install
+++ b/core/modules/node/node.install
@@ -13,26 +13,26 @@
  * Implements hook_requirements().
  */
 function node_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
   if ($phase === 'runtime') {
     // Only show rebuild button if there are either 0, or 2 or more, rows
     // in the {node_access} table, or if there are modules that
     // implement hook_node_grants().
     $grant_count = \Drupal::entityManager()->getAccessControlHandler('node')->countGrants();
     if ($grant_count != 1 || count(\Drupal::moduleHandler()->getImplementations('node_grants')) > 0) {
-      $value = \Drupal::translation()->formatPlural($grant_count, 'One permission in use', '@count permissions in use', array('@count' => $grant_count));
+      $value = \Drupal::translation()->formatPlural($grant_count, 'One permission in use', '@count permissions in use', ['@count' => $grant_count]);
     }
     else {
       $value = t('Disabled');
     }
 
-    $requirements['node_access'] = array(
+    $requirements['node_access'] = [
       'title' => t('Node Access Permissions'),
       'value' => $value,
-      'description' => t('If the site is experiencing problems with permissions to content, you may have to rebuild the permissions cache. Rebuilding will remove all privileges to content and replace them with permissions based on the current modules and settings. Rebuilding may take some time if there is a lot of content or complex permission settings. After rebuilding has completed, content will automatically use the new permissions. <a href=":rebuild">Rebuild permissions</a>', array(
+      'description' => t('If the site is experiencing problems with permissions to content, you may have to rebuild the permissions cache. Rebuilding will remove all privileges to content and replace them with permissions based on the current modules and settings. Rebuilding may take some time if there is a lot of content or complex permission settings. After rebuilding has completed, content will automatically use the new permissions. <a href=":rebuild">Rebuild permissions</a>', [
         ':rebuild' => \Drupal::url('node.configure_rebuild_confirm'),
-      )),
-    );
+      ]),
+    ];
   }
   return $requirements;
 }
@@ -41,78 +41,78 @@ function node_requirements($phase) {
  * Implements hook_schema().
  */
 function node_schema() {
-  $schema['node_access'] = array(
+  $schema['node_access'] = [
     'description' => 'Identifies which realm/grant pairs a user must possess in order to view, update, or delete specific nodes.',
-    'fields' => array(
-      'nid' => array(
+    'fields' => [
+      'nid' => [
         'description' => 'The {node}.nid this record affects.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'langcode' => array(
+      ],
+      'langcode' => [
         'description' => 'The {language}.langcode of this node.',
         'type' => 'varchar_ascii',
         'length' => 12,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'fallback' => array(
+      ],
+      'fallback' => [
         'description' => 'Boolean indicating whether this record should be used as a fallback if a language condition is not provided.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 1,
         'size' => 'tiny',
-      ),
-      'gid' => array(
+      ],
+      'gid' => [
         'description' => "The grant ID a user must possess in the specified realm to gain this row's privileges on the node.",
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'realm' => array(
+      ],
+      'realm' => [
         'description' => 'The realm in which the user must possess the grant ID. Each node access node can define one or more realms.',
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'grant_view' => array(
+      ],
+      'grant_view' => [
         'description' => 'Boolean indicating whether a user with the realm/grant pair can view this node.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'size' => 'tiny',
-      ),
-      'grant_update' => array(
+      ],
+      'grant_update' => [
         'description' => 'Boolean indicating whether a user with the realm/grant pair can edit this node.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'size' => 'tiny',
-      ),
-      'grant_delete' => array(
+      ],
+      'grant_delete' => [
         'description' => 'Boolean indicating whether a user with the realm/grant pair can delete this node.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'size' => 'tiny',
-      ),
-    ),
-    'primary key' => array('nid', 'gid', 'realm', 'langcode'),
-    'foreign keys' => array(
-      'affected_node' => array(
+      ],
+    ],
+    'primary key' => ['nid', 'gid', 'realm', 'langcode'],
+    'foreign keys' => [
+      'affected_node' => [
         'table' => 'node',
-        'columns' => array('nid' => 'nid'),
-      ),
-    ),
-  );
+        'columns' => ['nid' => 'nid'],
+      ],
+    ],
+  ];
 
   return $schema;
 }
@@ -129,20 +129,20 @@ function node_install() {
   // these permissions. Doing so also allows tests to continue to operate as
   // expected without first having to manually grant these default permissions.
   if (\Drupal::moduleHandler()->moduleExists('user')) {
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access content'));
-    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('access content'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access content']);
+    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, ['access content']);
   }
 
   // Populate the node access table.
   db_insert('node_access')
-    ->fields(array(
+    ->fields([
       'nid' => 0,
       'gid' => 0,
       'realm' => 'all',
       'grant_view' => 1,
       'grant_update' => 0,
       'grant_delete' => 0,
-    ))
+    ])
     ->execute();
 }
 
@@ -216,7 +216,7 @@ function node_update_8003() {
   //   changes. SqlContentEntityStorageSchema::onEntityTypeUpdate() should be
   //   fixed to automatically handle this.
   //   See https://www.drupal.org/node/2554245.
-  foreach (array('status', 'uid') as $field_name) {
+  foreach (['status', 'uid'] as $field_name) {
     $manager->updateFieldStorageDefinition($manager->getFieldStorageDefinition($field_name, 'node'));
   }
 }
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index 7d7247b75b223e0dcb6f3dc9b7f725ae984c8860..40e5b4e2938141408103f4e38474e29c44e96d56 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -90,7 +90,7 @@ function node_help($route_name, RouteMatchInterface $route_match) {
       $message = t('The content access permissions need to be rebuilt.');
     }
     else {
-      $message = t('The content access permissions need to be rebuilt. <a href=":node_access_rebuild">Rebuild permissions</a>.', array(':node_access_rebuild' => \Drupal::url('node.configure_rebuild_confirm')));
+      $message = t('The content access permissions need to be rebuilt. <a href=":node_access_rebuild">Rebuild permissions</a>.', [':node_access_rebuild' => \Drupal::url('node.configure_rebuild_confirm')]);
     }
     drupal_set_message($message, 'error');
   }
@@ -99,19 +99,19 @@ function node_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.node':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Node module manages the creation, editing, deletion, settings, and display of the main site content. Content items managed by the Node module are typically displayed as pages on your site, and include a title, some meta-data (author, creation time, content type, etc.), and optional fields containing text or other data (fields are managed by the <a href=":field">Field module</a>). For more information, see the <a href=":node">online documentation for the Node module</a>.', array(':node' => 'https://www.drupal.org/documentation/modules/node', ':field' => \Drupal::url('help.page', array('name' => 'field')))) . '</p>';
+      $output .= '<p>' . t('The Node module manages the creation, editing, deletion, settings, and display of the main site content. Content items managed by the Node module are typically displayed as pages on your site, and include a title, some meta-data (author, creation time, content type, etc.), and optional fields containing text or other data (fields are managed by the <a href=":field">Field module</a>). For more information, see the <a href=":node">online documentation for the Node module</a>.', [':node' => 'https://www.drupal.org/documentation/modules/node', ':field' => \Drupal::url('help.page', ['name' => 'field'])]) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Creating content') . '</dt>';
-      $output .= '<dd>' . t('When new content is created, the Node module records basic information about the content, including the author, date of creation, and the <a href=":content-type">Content type</a>. It also manages the <em>publishing options</em>, which define whether or not the content is published, promoted to the front page of the site, and/or sticky at the top of content lists. Default settings can be configured for each <a href=":content-type">type of content</a> on your site.', array(':content-type' => \Drupal::url('entity.node_type.collection'))) . '</dd>';
+      $output .= '<dd>' . t('When new content is created, the Node module records basic information about the content, including the author, date of creation, and the <a href=":content-type">Content type</a>. It also manages the <em>publishing options</em>, which define whether or not the content is published, promoted to the front page of the site, and/or sticky at the top of content lists. Default settings can be configured for each <a href=":content-type">type of content</a> on your site.', [':content-type' => \Drupal::url('entity.node_type.collection')]) . '</dd>';
       $output .= '<dt>' . t('Creating custom content types') . '</dt>';
-      $output .= '<dd>' . t('The Node module gives users with the <em>Administer content types</em> permission the ability to <a href=":content-new">create new content types</a> in addition to the default ones already configured. Creating custom content types gives you the flexibility to add <a href=":field">fields</a> and configure default settings that suit the differing needs of various site content.', array(':content-new' => \Drupal::url('node.type_add'), ':field' => \Drupal::url('help.page', array('name' => 'field')))) . '</dd>';
+      $output .= '<dd>' . t('The Node module gives users with the <em>Administer content types</em> permission the ability to <a href=":content-new">create new content types</a> in addition to the default ones already configured. Creating custom content types gives you the flexibility to add <a href=":field">fields</a> and configure default settings that suit the differing needs of various site content.', [':content-new' => \Drupal::url('node.type_add'), ':field' => \Drupal::url('help.page', ['name' => 'field'])]) . '</dd>';
       $output .= '<dt>' . t('Administering content') . '</dt>';
-      $output .= '<dd>' . t('The <a href=":content">Content</a> page lists your content, allowing you add new content, filter, edit or delete existing content, or perform bulk operations on existing content.', array(':content' => \Drupal::url('system.admin_content'))) . '</dd>';
+      $output .= '<dd>' . t('The <a href=":content">Content</a> page lists your content, allowing you add new content, filter, edit or delete existing content, or perform bulk operations on existing content.', [':content' => \Drupal::url('system.admin_content')]) . '</dd>';
       $output .= '<dt>' . t('Creating revisions') . '</dt>';
       $output .= '<dd>' . t('The Node module also enables you to create multiple versions of any content, and revert to older versions using the <em>Revision information</em> settings.') . '</dd>';
       $output .= '<dt>' . t('User permissions') . '</dt>';
-      $output .= '<dd>' . t('The Node module makes a number of permissions available for each content type, which can be set by role on the <a href=":permissions">permissions page</a>.', array(':permissions' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-node')))) . '</dd>';
+      $output .= '<dd>' . t('The Node module makes a number of permissions available for each content type, which can be set by role on the <a href=":permissions">permissions page</a>.', [':permissions' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-node'])]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -121,13 +121,13 @@ function node_help($route_name, RouteMatchInterface $route_match) {
     case 'entity.entity_form_display.node.default':
     case 'entity.entity_form_display.node.form_mode':
       $type = $route_match->getParameter('node_type');
-      return '<p>' . t('Content items can be edited using different form modes. Here, you can define which fields are shown and hidden when %type content is edited in each form mode, and define how the field form widgets are displayed in each form mode.', array('%type' => $type->label())) . '</p>' ;
+      return '<p>' . t('Content items can be edited using different form modes. Here, you can define which fields are shown and hidden when %type content is edited in each form mode, and define how the field form widgets are displayed in each form mode.', ['%type' => $type->label()]) . '</p>' ;
 
     case 'entity.entity_view_display.node.default':
     case 'entity.entity_view_display.node.view_mode':
       $type = $route_match->getParameter('node_type');
       return '<p>' . t('Content items can be displayed using different view modes: Teaser, Full content, Print, RSS, etc. <em>Teaser</em> is a short format that is typically used in lists of multiple content items. <em>Full content</em> is typically used when the content is displayed on its own page.') . '</p>' .
-        '<p>' . t('Here, you can define which fields are shown and hidden when %type content is displayed in each view mode, and define how the fields are displayed in each view mode.', array('%type' => $type->label())) . '</p>';
+        '<p>' . t('Here, you can define which fields are shown and hidden when %type content is displayed in each view mode, and define how the fields are displayed in each view mode.', ['%type' => $type->label()]) . '</p>';
 
     case 'entity.node.version_history':
       return '<p>' . t('Revisions allow you to track differences between multiple versions of your content, and revert to older versions.') . '</p>';
@@ -149,26 +149,26 @@ function node_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function node_theme() {
-  return array(
-    'node' => array(
+  return [
+    'node' => [
       'render element' => 'elements',
-    ),
-    'node_add_list' => array(
-      'variables' => array('content' => NULL),
-    ),
-    'node_edit_form' => array(
+    ],
+    'node_add_list' => [
+      'variables' => ['content' => NULL],
+    ],
+    'node_edit_form' => [
       'render element' => 'form',
-    ),
-    'field__node__title' => array(
+    ],
+    'field__node__title' => [
       'base hook' => 'field',
-    ),
-    'field__node__uid' => array(
+    ],
+    'field__node__uid' => [
       'base hook' => 'field',
-    ),
-    'field__node__created' => array(
+    ],
+    'field__node__created' => [
       'base hook' => 'field',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -204,19 +204,19 @@ function node_entity_view_display_alter(EntityViewDisplayInterface $display, $co
  *   $result, or FALSE if there are no rows in $result.
  */
 function node_title_list(StatementInterface $result, $title = NULL) {
-  $items = array();
+  $items = [];
   $num_rows = FALSE;
   $nids = [];
   foreach ($result as $row) {
     // Do not use $node->label() or $node->urlInfo() here, because we only have
     // database rows, not actual nodes.
     $nids[] = $row->nid;
-    $options = !empty($row->comment_count) ? array('attributes' => array('title' => \Drupal::translation()->formatPlural($row->comment_count, '1 comment', '@count comments'))) : array();
+    $options = !empty($row->comment_count) ? ['attributes' => ['title' => \Drupal::translation()->formatPlural($row->comment_count, '1 comment', '@count comments')]] : [];
     $items[] = \Drupal::l($row->title, new Url('entity.node.canonical', ['node' => $row->nid], $options));
     $num_rows = TRUE;
   }
 
-  return $num_rows ? array('#theme' => 'item_list__node', '#items' => $items, '#title' => $title, '#cache' => ['tags' => Cache::mergeTags(['node_list'], Cache::buildTags('node', $nids))]) : FALSE;
+  return $num_rows ? ['#theme' => 'item_list__node', '#items' => $items, '#title' => $title, '#cache' => ['tags' => Cache::mergeTags(['node_list'], Cache::buildTags('node', $nids))]] : FALSE;
 }
 
 /**
@@ -232,7 +232,7 @@ function node_title_list(StatementInterface $result, $title = NULL) {
  */
 function node_mark($nid, $timestamp) {
 
-  $cache = &drupal_static(__FUNCTION__, array());
+  $cache = &drupal_static(__FUNCTION__, []);
 
   if (\Drupal::currentUser()->isAnonymous() || !\Drupal::moduleHandler()->moduleExists('history')) {
     return MARK_READ;
@@ -346,23 +346,23 @@ function node_add_body_field(NodeTypeInterface $type, $label = 'Body') {
       'field_storage' => $field_storage,
       'bundle' => $type->id(),
       'label' => $label,
-      'settings' => array('display_summary' => TRUE),
+      'settings' => ['display_summary' => TRUE],
     ]);
     $field->save();
 
     // Assign widget settings for the 'default' form mode.
     entity_get_form_display('node', $type->id(), 'default')
-      ->setComponent('body', array(
+      ->setComponent('body', [
         'type' => 'text_textarea_with_summary',
-      ))
+      ])
       ->save();
 
     // Assign display settings for the 'default' and 'teaser' view modes.
     entity_get_display('node', $type->id(), 'default')
-      ->setComponent('body', array(
+      ->setComponent('body', [
         'label' => 'hidden',
         'type' => 'text_default',
-      ))
+      ])
       ->save();
 
     // The teaser view mode is created by the Standard profile and therefore
@@ -370,10 +370,10 @@ function node_add_body_field(NodeTypeInterface $type, $label = 'Body') {
     $view_modes = \Drupal::entityManager()->getViewModes('node');
     if (isset($view_modes['teaser'])) {
       entity_get_display('node', $type->id(), 'teaser')
-        ->setComponent('body', array(
+        ->setComponent('body', [
           'label' => 'hidden',
           'type' => 'text_summary_or_trimmed',
-        ))
+        ])
         ->save();
     }
   }
@@ -385,15 +385,15 @@ function node_add_body_field(NodeTypeInterface $type, $label = 'Body') {
  * Implements hook_entity_extra_field_info().
  */
 function node_entity_extra_field_info() {
-  $extra = array();
+  $extra = [];
   $description = t('Node module element');
   foreach (NodeType::loadMultiple() as $bundle) {
-    $extra['node'][$bundle->id()]['display']['links'] = array(
+    $extra['node'][$bundle->id()]['display']['links'] = [
       'label' => t('Links'),
       'description' => $description,
       'weight' => 100,
       'visible' => TRUE,
-    );
+    ];
   }
 
   return $extra;
@@ -460,7 +460,7 @@ function node_load_multiple(array $nids = NULL, $reset = FALSE) {
  */
 function node_load($nid = NULL, $reset = FALSE) {
   if ($reset) {
-    \Drupal::entityManager()->getStorage('node')->resetCache(array($nid));
+    \Drupal::entityManager()->getStorage('node')->resetCache([$nid]);
   }
   return Node::load($nid);
 }
@@ -517,16 +517,16 @@ function node_is_page(NodeInterface $node) {
  * @see node_add_page()
  */
 function template_preprocess_node_add_list(&$variables) {
-  $variables['types'] = array();
+  $variables['types'] = [];
   if (!empty($variables['content'])) {
     foreach ($variables['content'] as $type) {
-      $variables['types'][$type->id()] = array(
+      $variables['types'][$type->id()] = [
         'type' => $type->id(),
-        'add_link' => \Drupal::l($type->label(), new Url('node.add', array('node_type' => $type->id()))),
-        'description' => array(
+        'add_link' => \Drupal::l($type->label(), new Url('node.add', ['node_type' => $type->id()])),
+        'description' => [
           '#markup' => $type->getDescription(),
-        ),
-      );
+        ],
+      ];
     }
   }
 }
@@ -558,7 +558,7 @@ function node_preprocess_block(&$variables) {
  * Implements hook_theme_suggestions_HOOK().
  */
 function node_theme_suggestions_node(array $variables) {
-  $suggestions = array();
+  $suggestions = [];
   $node = $variables['elements']['#node'];
   $sanitized_view_mode = strtr($variables['elements']['#view_mode'], '.', '_');
 
@@ -598,18 +598,18 @@ function template_preprocess_node(&$variables) {
   $variables['author_name'] = drupal_render($variables['elements']['uid']);
   unset($variables['elements']['uid']);
 
-  $variables['url'] = $node->url('canonical', array(
+  $variables['url'] = $node->url('canonical', [
     'language' => $node->language(),
-  ));
+  ]);
   $variables['label'] = $variables['elements']['title'];
   unset($variables['elements']['title']);
   // The 'page' variable is set to TRUE in two occasions:
   //   - The view mode is 'full' and we are on the 'node.view' route.
   //   - The node is in preview and view mode is either 'full' or 'default'.
-  $variables['page'] = ($variables['view_mode'] == 'full' && (node_is_page($node)) || (isset($node->in_preview) && in_array($node->preview_view_mode, array('full', 'default'))));
+  $variables['page'] = ($variables['view_mode'] == 'full' && (node_is_page($node)) || (isset($node->in_preview) && in_array($node->preview_view_mode, ['full', 'default'])));
 
   // Helpful $content variable for templates.
-  $variables += array('content' => array());
+  $variables += ['content' => []];
   foreach (Element::children($variables['elements']) as $key) {
     $variables['content'][$key] = $variables['elements'][$key];
   }
@@ -648,10 +648,10 @@ function node_cron() {
       ->execute();
     if (isset($result[0])) {
       // Make an array with definite keys and store it in the state system.
-      $array = array(
+      $array = [
         'min_created' => $result[0][$min_alias],
         'max_created' => $result[0][$max_alias],
-      );
+      ];
       \Drupal::state()->set('node.min_max_update_time', $array);
     }
   }
@@ -662,35 +662,35 @@ function node_cron() {
  */
 function node_ranking() {
   // Create the ranking array and add the basic ranking options.
-  $ranking = array(
-    'relevance' => array(
+  $ranking = [
+    'relevance' => [
       'title' => t('Keyword relevance'),
       // Average relevance values hover around 0.15
       'score' => 'i.relevance',
-    ),
-    'sticky' => array(
+    ],
+    'sticky' => [
       'title' => t('Content is sticky at top of lists'),
       // The sticky flag is either 0 or 1, which is automatically normalized.
       'score' => 'n.sticky',
-    ),
-    'promote' => array(
+    ],
+    'promote' => [
       'title' => t('Content is promoted to the front page'),
       // The promote flag is either 0 or 1, which is automatically normalized.
       'score' => 'n.promote',
-    ),
-  );
+    ],
+  ];
   // Add relevance based on updated date, but only if it the scale values have
   // been calculated in node_cron().
   if ($node_min_max = \Drupal::state()->get('node.min_max_update_time')) {
-    $ranking['recent'] = array(
+    $ranking['recent'] = [
       'title' => t('Recently created'),
       // Exponential decay with half life of 14% of the age range of nodes.
       'score' => 'EXP(-5 * (1 - (n.created - :node_oldest) / :node_range))',
-      'arguments' => array(
+      'arguments' => [
         ':node_oldest' => $node_min_max['min_created'],
         ':node_range' => max($node_min_max['max_created'] - $node_min_max['min_created'], 1),
-      ),
-    );
+      ],
+    ];
   }
   return $ranking;
 }
@@ -706,17 +706,17 @@ function node_user_cancel($edit, $account, $method) {
         ->condition('uid', $account->id())
         ->execute();
       module_load_include('inc', 'node', 'node.admin');
-      node_mass_update($nids, array('status' => 0), NULL, TRUE);
+      node_mass_update($nids, ['status' => 0], NULL, TRUE);
       break;
 
     case 'user_cancel_reassign':
       // Anonymize all of the nodes for this old account.
       module_load_include('inc', 'node', 'node.admin');
       $vids = \Drupal::entityManager()->getStorage('node')->userRevisionIds($account);
-      node_mass_update($vids, array(
+      node_mass_update($vids, [
         'uid' => 0,
         'revision_uid' => 0,
-      ), NULL, TRUE, TRUE);
+      ], NULL, TRUE, TRUE);
       break;
   }
 }
@@ -779,7 +779,7 @@ function node_get_recent($number = 10) {
 
   $nodes = Node::loadMultiple($nids);
 
-  return $nodes ? $nodes : array();
+  return $nodes ? $nodes : [];
 }
 
 /**
@@ -825,12 +825,12 @@ function node_page_top(array &$page) {
   // Add 'Back to content editing' link on preview page.
   $route_match = \Drupal::routeMatch();
   if ($route_match->getRouteName() == 'entity.node.preview') {
-    $page['page_top']['node_preview'] = array(
+    $page['page_top']['node_preview'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('node-preview-container', 'container-inline')
-      ),
-    );
+      '#attributes' => [
+        'class' => ['node-preview-container', 'container-inline']
+      ],
+    ];
 
     $form = \Drupal::formBuilder()->getForm('\Drupal\node\Form\NodePreviewForm', $route_match->getParameter('node_preview'));
     $page['page_top']['node_preview']['view_mode'] = $form;
@@ -845,12 +845,12 @@ function node_page_top(array &$page) {
  * @see node_form_system_themes_admin_form_submit()
  */
 function node_form_system_themes_admin_form_alter(&$form, FormStateInterface $form_state, $form_id) {
-  $form['admin_theme']['use_admin_theme'] = array(
+  $form['admin_theme']['use_admin_theme'] = [
     '#type' => 'checkbox',
     '#title' => t('Use the administration theme when editing or creating content'),
-    '#description' => t('Control which roles can "View the administration theme" on the <a href=":permissions">Permissions page</a>.', array(':permissions' => Url::fromRoute('user.admin_permissions')->toString())),
+    '#description' => t('Control which roles can "View the administration theme" on the <a href=":permissions">Permissions page</a>.', [':permissions' => Url::fromRoute('user.admin_permissions')->toString()]),
     '#default_value' => \Drupal::configFactory()->getEditable('node.settings')->get('use_admin_theme'),
-  );
+  ];
   $form['#submit'][] = 'node_form_system_themes_admin_form_submit';
 }
 
@@ -970,11 +970,11 @@ function node_node_access(NodeInterface $node, $op, $account) {
  */
 function node_access_grants($op, AccountInterface $account) {
   // Fetch node access grants from other modules.
-  $grants = \Drupal::moduleHandler()->invokeAll('node_grants', array($account, $op));
+  $grants = \Drupal::moduleHandler()->invokeAll('node_grants', [$account, $op]);
   // Allow modules to alter the assigned grants.
   \Drupal::moduleHandler()->alter('node_grants', $grants, $account, $op);
 
-  return array_merge(array('all' => array(0)), $grants);
+  return array_merge(['all' => [0]], $grants);
 }
 
 /**
@@ -1168,13 +1168,13 @@ function node_access_rebuild($batch_mode = FALSE) {
   // Only recalculate if the site is using a node_access module.
   if (count(\Drupal::moduleHandler()->getImplementations('node_grants'))) {
     if ($batch_mode) {
-      $batch = array(
+      $batch = [
         'title' => t('Rebuilding content access permissions'),
-        'operations' => array(
-          array('_node_access_rebuild_batch_operation', array()),
-        ),
+        'operations' => [
+          ['_node_access_rebuild_batch_operation', []],
+        ],
         'finished' => '_node_access_rebuild_batch_finished'
-      );
+      ];
       batch_set($batch);
     }
     else {
@@ -1192,7 +1192,7 @@ function node_access_rebuild($batch_mode = FALSE) {
       $entity_query->accessCheck(FALSE);
       $nids = $entity_query->execute();
       foreach ($nids as $nid) {
-        $node_storage->resetCache(array($nid));
+        $node_storage->resetCache([$nid]);
         $node = Node::load($nid);
         // To preserve database integrity, only write grants if the node
         // loads successfully.
diff --git a/core/modules/node/node.tokens.inc b/core/modules/node/node.tokens.inc
index 81fa3f088e0a57ac6a46b0ac695af053d5066ea2..2fcf0ddfa8f5f4bbce803dcf2f67a6600add24b0 100644
--- a/core/modules/node/node.tokens.inc
+++ b/core/modules/node/node.tokens.inc
@@ -14,71 +14,71 @@
  * Implements hook_token_info().
  */
 function node_token_info() {
-  $type = array(
+  $type = [
     'name' => t('Nodes'),
     'description' => t('Tokens related to individual content items, or "nodes".'),
     'needs-data' => 'node',
-  );
+  ];
 
   // Core tokens for nodes.
-  $node['nid'] = array(
+  $node['nid'] = [
     'name' => t("Content ID"),
     'description' => t('The unique ID of the content item, or "node".'),
-  );
-  $node['vid'] = array(
+  ];
+  $node['vid'] = [
     'name' => t("Revision ID"),
     'description' => t("The unique ID of the node's latest revision."),
-  );
-  $node['type'] = array(
+  ];
+  $node['type'] = [
     'name' => t("Content type"),
-  );
-  $node['type-name'] = array(
+  ];
+  $node['type-name'] = [
     'name' => t("Content type name"),
     'description' => t("The human-readable name of the node type."),
-  );
-  $node['title'] = array(
+  ];
+  $node['title'] = [
     'name' => t("Title"),
-  );
-  $node['body'] = array(
+  ];
+  $node['body'] = [
     'name' => t("Body"),
     'description' => t("The main body text of the node."),
-  );
-  $node['summary'] = array(
+  ];
+  $node['summary'] = [
     'name' => t("Summary"),
     'description' => t("The summary of the node's main body text."),
-  );
-  $node['langcode'] = array(
+  ];
+  $node['langcode'] = [
     'name' => t('Language code'),
     'description' => t('The language code of the language the node is written in.'),
-  );
-  $node['url'] = array(
+  ];
+  $node['url'] = [
     'name' => t("URL"),
     'description' => t("The URL of the node."),
-  );
-  $node['edit-url'] = array(
+  ];
+  $node['edit-url'] = [
     'name' => t("Edit URL"),
     'description' => t("The URL of the node's edit page."),
-  );
+  ];
 
   // Chained tokens for nodes.
-  $node['created'] = array(
+  $node['created'] = [
     'name' => t("Date created"),
     'type' => 'date',
-  );
-  $node['changed'] = array(
+  ];
+  $node['changed'] = [
     'name' => t("Date changed"),
     'description' => t("The date the node was most recently updated."),
     'type' => 'date',
-  );
-  $node['author'] = array(
+  ];
+  $node['author'] = [
     'name' => t("Author"),
     'type' => 'user',
-  );
+  ];
 
-  return array(
-    'types' => array('node' => $type),
-    'tokens' => array('node' => $node),
-  );
+  return [
+    'types' => ['node' => $type],
+    'tokens' => ['node' => $node],
+  ];
 }
 
 /**
@@ -87,7 +87,7 @@ function node_token_info() {
 function node_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
   $token_service = \Drupal::token();
 
-  $url_options = array('absolute' => TRUE);
+  $url_options = ['absolute' => TRUE];
   if (isset($options['langcode'])) {
     $url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
     $langcode = $options['langcode'];
@@ -95,7 +95,7 @@ function node_tokens($type, $tokens, array $data, array $options, BubbleableMeta
   else {
     $langcode = LanguageInterface::LANGCODE_DEFAULT;
   }
-  $replacements = array();
+  $replacements = [];
 
   if ($type == 'node' && !empty($data['node'])) {
     /** @var \Drupal\node\NodeInterface $node */
@@ -127,7 +127,7 @@ function node_tokens($type, $tokens, array $data, array $options, BubbleableMeta
 
         case 'body':
         case 'summary':
-          $translation = \Drupal::entityManager()->getTranslationFromContext($node, $langcode, array('operation' => 'node_tokens'));
+          $translation = \Drupal::entityManager()->getTranslationFromContext($node, $langcode, ['operation' => 'node_tokens']);
           if ($translation->hasField('body') && ($items = $translation->get('body')) && !$items->isEmpty()) {
             $item = $items[0];
             // If the summary was requested and is not empty, use it.
@@ -195,15 +195,15 @@ function node_tokens($type, $tokens, array $data, array $options, BubbleableMeta
     }
 
     if ($author_tokens = $token_service->findWithPrefix($tokens, 'author')) {
-      $replacements += $token_service->generate('user', $author_tokens, array('user' => $node->getOwner()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('user', $author_tokens, ['user' => $node->getOwner()], $options, $bubbleable_metadata);
     }
 
     if ($created_tokens = $token_service->findWithPrefix($tokens, 'created')) {
-      $replacements += $token_service->generate('date', $created_tokens, array('date' => $node->getCreatedTime()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $created_tokens, ['date' => $node->getCreatedTime()], $options, $bubbleable_metadata);
     }
 
     if ($changed_tokens = $token_service->findWithPrefix($tokens, 'changed')) {
-      $replacements += $token_service->generate('date', $changed_tokens, array('date' => $node->getChangedTime()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $changed_tokens, ['date' => $node->getChangedTime()], $options, $bubbleable_metadata);
     }
   }
 
diff --git a/core/modules/node/node.views_execution.inc b/core/modules/node/node.views_execution.inc
index 193e47994d74fb13756ef944ad84387516304953..4d834a11e3556ba5e1628458faebd8a0fba2226d 100644
--- a/core/modules/node/node.views_execution.inc
+++ b/core/modules/node/node.views_execution.inc
@@ -14,18 +14,18 @@
  */
 function node_views_query_substitutions(ViewExecutable $view) {
   $account = \Drupal::currentUser();
-  return array(
+  return [
     '***ADMINISTER_NODES***' => intval($account->hasPermission('administer nodes')),
     '***VIEW_OWN_UNPUBLISHED_NODES***' => intval($account->hasPermission('view own unpublished content')),
     '***BYPASS_NODE_ACCESS***' => intval($account->hasPermission('bypass node access')),
-  );
+  ];
 }
 
 /**
  * Implements hook_views_analyze().
  */
 function node_views_analyze(ViewExecutable $view) {
-  $ret = array();
+  $ret = [];
   // Check for something other than the default display:
   if ($view->storage->get('base_table') == 'node') {
     foreach ($view->displayHandlers as $display) {
@@ -38,7 +38,7 @@ function node_views_analyze(ViewExecutable $view) {
           $authenticated_role = Role::load(RoleInterface::AUTHENTICATED_ID);
           $authenticated_has_access = $authenticated_role && $authenticated_role->hasPermission('access content');
           if (!$anonymous_has_access || !$authenticated_has_access) {
-            $ret[] = Analyzer::formatMessage(t('Some roles lack permission to access content, but display %display has no access control.', array('%display' => $display->display['display_title'])), 'warning');
+            $ret[] = Analyzer::formatMessage(t('Some roles lack permission to access content, but display %display has no access control.', ['%display' => $display->display['display_title']]), 'warning');
           }
           $filters = $display->getOption('filters');
           foreach ($filters as $filter) {
@@ -46,7 +46,7 @@ function node_views_analyze(ViewExecutable $view) {
               continue 2;
             }
           }
-          $ret[] = Analyzer::formatMessage(t('Display %display has no access control but does not contain a filter for published nodes.', array('%display' => $display->display['display_title'])), 'warning');
+          $ret[] = Analyzer::formatMessage(t('Display %display has no access control but does not contain a filter for published nodes.', ['%display' => $display->display['display_title']]), 'warning');
         }
       }
     }
@@ -54,7 +54,7 @@ function node_views_analyze(ViewExecutable $view) {
   foreach ($view->displayHandlers as $display) {
     if ($display->getPluginId() == 'page') {
       if ($display->getOption('path') == 'node/%') {
-        $ret[] = Analyzer::formatMessage(t('Display %display has set node/% as path. This will not produce what you want. If you want to have multiple versions of the node view, use panels.', array('%display' => $display->display['display_title'])), 'warning');
+        $ret[] = Analyzer::formatMessage(t('Display %display has set node/% as path. This will not produce what you want. If you want to have multiple versions of the node view, use panels.', ['%display' => $display->display['display_title']]), 'warning');
       }
     }
   }
diff --git a/core/modules/node/src/Access/NodeRevisionAccessCheck.php b/core/modules/node/src/Access/NodeRevisionAccessCheck.php
index 2005ec7e74be04ee037db225830bf59c195ef480..b85d783a1d135280a81d9e5d3b4d6f556f664d0f 100644
--- a/core/modules/node/src/Access/NodeRevisionAccessCheck.php
+++ b/core/modules/node/src/Access/NodeRevisionAccessCheck.php
@@ -35,7 +35,7 @@ class NodeRevisionAccessCheck implements AccessInterface {
    *
    * @var array
    */
-  protected $access = array();
+  protected $access = [];
 
   /**
    * Constructs a new NodeRevisionAccessCheck.
@@ -90,17 +90,17 @@ public function access(Route $route, AccountInterface $account, $node_revision =
    *   TRUE if the operation may be performed, FALSE otherwise.
    */
   public function checkAccess(NodeInterface $node, AccountInterface $account, $op = 'view') {
-    $map = array(
+    $map = [
       'view' => 'view all revisions',
       'update' => 'revert all revisions',
       'delete' => 'delete all revisions',
-    );
+    ];
     $bundle = $node->bundle();
-    $type_map = array(
+    $type_map = [
       'view' => "view $bundle revisions",
       'update' => "revert $bundle revisions",
       'delete' => "delete $bundle revisions",
-    );
+    ];
 
     if (!$node || !isset($map[$op]) || !isset($type_map[$op])) {
       // If there was no node to check against, or the $op was not one of the
diff --git a/core/modules/node/src/ContextProvider/NodeRouteContext.php b/core/modules/node/src/ContextProvider/NodeRouteContext.php
index 2b745e9e6e860c40455b2d3adfb09022cf72b957..2e10a8a643c5ea4b4aa45731c11432cea7789264 100644
--- a/core/modules/node/src/ContextProvider/NodeRouteContext.php
+++ b/core/modules/node/src/ContextProvider/NodeRouteContext.php
@@ -48,7 +48,7 @@ public function getRuntimeContexts(array $unqualified_context_ids) {
     }
     elseif ($this->routeMatch->getRouteName() == 'node.add') {
       $node_type = $this->routeMatch->getParameter('node_type');
-      $value = Node::create(array('type' => $node_type->id()));
+      $value = Node::create(['type' => $node_type->id()]);
     }
 
     $cacheability = new CacheableMetadata();
diff --git a/core/modules/node/src/Controller/NodeController.php b/core/modules/node/src/Controller/NodeController.php
index 048b949c4bd26f979fdbbef717b1836b307dea98..48401475fcdc1e81703dceeaf44652b8ca9820ca 100644
--- a/core/modules/node/src/Controller/NodeController.php
+++ b/core/modules/node/src/Controller/NodeController.php
@@ -74,7 +74,7 @@ public function addPage() {
       ],
     ];
 
-    $content = array();
+    $content = [];
 
     // Only use node types the user has access to.
     foreach ($this->entityManager()->getStorage('node_type')->loadMultiple() as $type) {
@@ -88,7 +88,7 @@ public function addPage() {
     // Bypass the node/add listing if only one content type is available.
     if (count($content) == 1) {
       $type = array_shift($content);
-      return $this->redirect('node.add', array('node_type' => $type->id()));
+      return $this->redirect('node.add', ['node_type' => $type->id()]);
     }
 
     $build['#content'] = $content;
@@ -106,9 +106,9 @@ public function addPage() {
    *   A node submission form.
    */
   public function add(NodeTypeInterface $node_type) {
-    $node = $this->entityManager()->getStorage('node')->create(array(
+    $node = $this->entityManager()->getStorage('node')->create([
       'type' => $node_type->id(),
-    ));
+    ]);
 
     $form = $this->entityFormBuilder()->getForm($node);
 
@@ -144,7 +144,7 @@ public function revisionShow($node_revision) {
    */
   public function revisionPageTitle($node_revision) {
     $node = $this->entityManager()->getStorage('node')->loadRevision($node_revision);
-    return $this->t('Revision of %title from %date', array('%title' => $node->label(), '%date' => format_date($node->getRevisionCreationTime())));
+    return $this->t('Revision of %title from %date', ['%title' => $node->label(), '%date' => format_date($node->getRevisionCreationTime())]);
   }
 
   /**
@@ -166,12 +166,12 @@ public function revisionOverview(NodeInterface $node) {
     $type = $node->getType();
 
     $build['#title'] = $has_translations ? $this->t('@langname revisions for %title', ['@langname' => $langname, '%title' => $node->label()]) : $this->t('Revisions for %title', ['%title' => $node->label()]);
-    $header = array($this->t('Revision'), $this->t('Operations'));
+    $header = [$this->t('Revision'), $this->t('Operations')];
 
     $revert_permission = (($account->hasPermission("revert $type revisions") || $account->hasPermission('revert all revisions') || $account->hasPermission('administer nodes')) && $node->access('update'));
     $delete_permission = (($account->hasPermission("delete $type revisions") || $account->hasPermission('delete all revisions') || $account->hasPermission('administer nodes')) && $node->access('delete'));
 
-    $rows = array();
+    $rows = [];
     $default_revision = $node->getRevisionId();
 
     foreach ($this->getRevisionIds($node, $node_storage) as $vid) {
@@ -254,17 +254,17 @@ public function revisionOverview(NodeInterface $node) {
       }
     }
 
-    $build['node_revisions_table'] = array(
+    $build['node_revisions_table'] = [
       '#theme' => 'table',
       '#rows' => $rows,
       '#header' => $header,
-      '#attached' => array(
-        'library' => array('node/drupal.node.admin'),
-      ),
+      '#attached' => [
+        'library' => ['node/drupal.node.admin'],
+      ],
       '#attributes' => ['class' => 'node-revision-table'],
-    );
+    ];
 
-    $build['pager'] = array('#type' => 'pager');
+    $build['pager'] = ['#type' => 'pager'];
 
     return $build;
   }
@@ -279,7 +279,7 @@ public function revisionOverview(NodeInterface $node) {
    *   The page title.
    */
   public function addPageTitle(NodeTypeInterface $node_type) {
-    return $this->t('Create @name', array('@name' => $node_type->label()));
+    return $this->t('Create @name', ['@name' => $node_type->label()]);
   }
 
   /**
diff --git a/core/modules/node/src/Controller/NodeViewController.php b/core/modules/node/src/Controller/NodeViewController.php
index fce50e144ab6e78473a2c70729a130141bf446d4..b8aa1e5a977a58312d075a4b1ae5d5d0da40cce7 100644
--- a/core/modules/node/src/Controller/NodeViewController.php
+++ b/core/modules/node/src/Controller/NodeViewController.php
@@ -68,24 +68,24 @@ public function view(EntityInterface $node, $view_mode = 'full', $langcode = NUL
       // metadata if we have to check access.
       if ($this->currentUser->isAuthenticated() || $url->access($this->currentUser)) {
         // Set the node path as the canonical URL to prevent duplicate content.
-        $build['#attached']['html_head_link'][] = array(
-          array(
+        $build['#attached']['html_head_link'][] = [
+          [
             'rel' => $rel,
             'href' => $url->toString(),
-          ),
+          ],
           TRUE,
-        );
+        ];
       }
 
       if ($rel == 'canonical') {
         // Set the non-aliased canonical path as a default shortlink.
-        $build['#attached']['html_head_link'][] = array(
-          array(
+        $build['#attached']['html_head_link'][] = [
+          [
             'rel' => 'shortlink',
             'href' => $url->setOption('alias', TRUE)->toString(),
-          ),
+          ],
           TRUE,
-        );
+        ];
       }
     }
 
diff --git a/core/modules/node/src/Entity/Node.php b/core/modules/node/src/Entity/Node.php
index 263f7c8f7334a4ed17a9a9ccd2d4124d772c497a..c11a18889a3953ea6fb25387aab7b0e204edb9c5 100644
--- a/core/modules/node/src/Entity/Node.php
+++ b/core/modules/node/src/Entity/Node.php
@@ -371,15 +371,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setTranslatable(TRUE)
       ->setRevisionable(TRUE)
       ->setSetting('max_length', 255)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'string',
         'weight' => -5,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -5,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['uid'] = BaseFieldDefinition::create('entity_reference')
@@ -389,20 +389,20 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setSetting('target_type', 'user')
       ->setDefaultValueCallback('Drupal\node\Entity\Node::getCurrentUserId')
       ->setTranslatable(TRUE)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'author',
         'weight' => 0,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'entity_reference_autocomplete',
         'weight' => 5,
-        'settings' => array(
+        'settings' => [
           'match_operator' => 'CONTAINS',
           'size' => '60',
           'placeholder' => '',
-        ),
-      ))
+        ],
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['created'] = BaseFieldDefinition::create('created')
@@ -410,15 +410,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setDescription(t('The time that the node was created.'))
       ->setRevisionable(TRUE)
       ->setTranslatable(TRUE)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'timestamp',
         'weight' => 0,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'datetime_timestamp',
         'weight' => 10,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['changed'] = BaseFieldDefinition::create('changed')
@@ -432,13 +432,13 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setRevisionable(TRUE)
       ->setTranslatable(TRUE)
       ->setDefaultValue(TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'boolean_checkbox',
-        'settings' => array(
+        'settings' => [
           'display_label' => TRUE,
-        ),
+        ],
         'weight' => 15,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['sticky'] = BaseFieldDefinition::create('boolean')
@@ -446,13 +446,13 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setRevisionable(TRUE)
       ->setTranslatable(TRUE)
       ->setDefaultValue(FALSE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'boolean_checkbox',
-        'settings' => array(
+        'settings' => [
           'display_label' => TRUE,
-        ),
+        ],
         'weight' => 16,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['revision_timestamp'] = BaseFieldDefinition::create('created')
@@ -471,13 +471,13 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setDescription(t('Briefly describe the changes you have made.'))
       ->setRevisionable(TRUE)
       ->setDefaultValue('')
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textarea',
         'weight' => 25,
-        'settings' => array(
+        'settings' => [
           'rows' => 4,
-        ),
-      ));
+        ],
+      ]);
 
     $fields['revision_translation_affected'] = BaseFieldDefinition::create('boolean')
       ->setLabel(t('Revision translation affected'))
@@ -498,7 +498,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
    *   An array of default values.
    */
   public static function getCurrentUserId() {
-    return array(\Drupal::currentUser()->id());
+    return [\Drupal::currentUser()->id()];
   }
 
 }
diff --git a/core/modules/node/src/Entity/NodeType.php b/core/modules/node/src/Entity/NodeType.php
index 23f24a468bb54358403ca818baeb67955917ef8f..e4a4c3b6c142abf7467fc215ab115a15d61426cf 100644
--- a/core/modules/node/src/Entity/NodeType.php
+++ b/core/modules/node/src/Entity/NodeType.php
@@ -182,10 +182,10 @@ public function postSave(EntityStorageInterface $storage, $update = TRUE) {
         drupal_set_message(\Drupal::translation()->formatPlural($update_count,
           'Changed the content type of 1 post from %old-type to %type.',
           'Changed the content type of @count posts from %old-type to %type.',
-          array(
+          [
             '%old-type' => $this->getOriginalId(),
             '%type' => $this->id(),
-          )));
+          ]));
       }
     }
     if ($update) {
diff --git a/core/modules/node/src/Form/DeleteMultiple.php b/core/modules/node/src/Form/DeleteMultiple.php
index 7066b94c3dfe1d17a6f4a81835d443553d8e6198..91d8ad4a9ea15747111aa40e9b7dda5f46ee5853 100644
--- a/core/modules/node/src/Form/DeleteMultiple.php
+++ b/core/modules/node/src/Form/DeleteMultiple.php
@@ -20,7 +20,7 @@ class DeleteMultiple extends ConfirmFormBase {
    *
    * @var string[][]
    */
-  protected $nodeInfo = array();
+  protected $nodeInfo = [];
 
   /**
    * The tempstore factory.
@@ -130,10 +130,10 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       }
     }
 
-    $form['nodes'] = array(
+    $form['nodes'] = [
       '#theme' => 'item_list',
       '#items' => $items,
-    );
+    ];
     $form = parent::buildForm($form, $form_state);
 
     return $form;
@@ -167,7 +167,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
       if ($delete_nodes) {
         $this->storage->delete($delete_nodes);
-        $this->logger('content')->notice('Deleted @count posts.', array('@count' => count($delete_nodes)));
+        $this->logger('content')->notice('Deleted @count posts.', ['@count' => count($delete_nodes)]);
       }
 
       if ($delete_translations) {
@@ -182,7 +182,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         }
         if ($count) {
           $total_count += $count;
-          $this->logger('content')->notice('Deleted @count content translations.', array('@count' => $count));
+          $this->logger('content')->notice('Deleted @count content translations.', ['@count' => $count]);
         }
       }
 
diff --git a/core/modules/node/src/Form/NodeDeleteForm.php b/core/modules/node/src/Form/NodeDeleteForm.php
index 7afac867f6b8b343808d5d3aeb4d03dd72c9fb7a..da8c2025c11c7186815dc192b9f992ad1c1bba63 100644
--- a/core/modules/node/src/Form/NodeDeleteForm.php
+++ b/core/modules/node/src/Form/NodeDeleteForm.php
@@ -27,10 +27,10 @@ protected function getDeletionMessage() {
       ]);
     }
 
-    return $this->t('The @type %title has been deleted.', array(
+    return $this->t('The @type %title has been deleted.', [
       '@type' => $node_type,
       '%title' => $this->getEntity()->label(),
-    ));
+    ]);
   }
 
   /**
diff --git a/core/modules/node/src/Form/NodePreviewForm.php b/core/modules/node/src/Form/NodePreviewForm.php
index 829fee100a87e5e006827b0b00fdaacfe954c9af..8b6125b87a8449bf62cb5c3f1f669b809ebdd84e 100644
--- a/core/modules/node/src/Form/NodePreviewForm.php
+++ b/core/modules/node/src/Form/NodePreviewForm.php
@@ -72,18 +72,18 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state, EntityInterface $node = NULL) {
     $view_mode = $node->preview_view_mode;
 
-    $query_options = array('query' => array('uuid' => $node->uuid()));
+    $query_options = ['query' => ['uuid' => $node->uuid()]];
     $query = $this->getRequest()->query;
     if ($query->has('destination')) {
       $query_options['query']['destination'] = $query->get('destination');
     }
 
-    $form['backlink'] = array(
+    $form['backlink'] = [
       '#type' => 'link',
       '#title' => $this->t('Back to content editing'),
       '#url' => $node->isNew() ? Url::fromRoute('node.add', ['node_type' => $node->bundle()]) : $node->urlInfo('edit-form'),
-      '#options' => array('attributes' => array('class' => array('node-preview-backlink'))) + $query_options,
-    );
+      '#options' => ['attributes' => ['class' => ['node-preview-backlink']]] + $query_options,
+    ];
 
     // Always show full as an option, even if the display is not enabled.
     $view_mode_options = ['full' => $this->t('Full')] + $this->entityManager->getViewModeOptionsByBundle('node', $node->bundle());
@@ -93,28 +93,28 @@ public function buildForm(array $form, FormStateInterface $form_state, EntityInt
     unset($view_mode_options['rss']);
     unset($view_mode_options['search_index']);
 
-    $form['uuid'] = array(
+    $form['uuid'] = [
       '#type' => 'value',
       '#value' => $node->uuid(),
-    );
+    ];
 
-    $form['view_mode'] = array(
+    $form['view_mode'] = [
       '#type' => 'select',
       '#title' => $this->t('View mode'),
       '#options' => $view_mode_options,
       '#default_value' => $view_mode,
-      '#attributes' => array(
+      '#attributes' => [
         'data-drupal-autosubmit' => TRUE,
-      )
-    );
+      ]
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Switch'),
-      '#attributes' => array(
-        'class' => array('js-hide'),
-      ),
-    );
+      '#attributes' => [
+        'class' => ['js-hide'],
+      ],
+    ];
 
     return $form;
   }
diff --git a/core/modules/node/src/Form/NodeRevisionDeleteForm.php b/core/modules/node/src/Form/NodeRevisionDeleteForm.php
index 27eec48e563043642b1da495ddf81b1a3722baee..86e5b59c125b7c687a8b316bc8fe033c4700e9c1 100644
--- a/core/modules/node/src/Form/NodeRevisionDeleteForm.php
+++ b/core/modules/node/src/Form/NodeRevisionDeleteForm.php
@@ -81,14 +81,14 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return t('Are you sure you want to delete the revision from %revision-date?', array('%revision-date' => format_date($this->revision->getRevisionCreationTime())));
+    return t('Are you sure you want to delete the revision from %revision-date?', ['%revision-date' => format_date($this->revision->getRevisionCreationTime())]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function getCancelUrl() {
-    return new Url('entity.node.version_history', array('node' => $this->revision->id()));
+    return new Url('entity.node.version_history', ['node' => $this->revision->id()]);
   }
 
   /**
@@ -114,17 +114,17 @@ public function buildForm(array $form, FormStateInterface $form_state, $node_rev
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->nodeStorage->deleteRevision($this->revision->getRevisionId());
 
-    $this->logger('content')->notice('@type: deleted %title revision %revision.', array('@type' => $this->revision->bundle(), '%title' => $this->revision->label(), '%revision' => $this->revision->getRevisionId()));
+    $this->logger('content')->notice('@type: deleted %title revision %revision.', ['@type' => $this->revision->bundle(), '%title' => $this->revision->label(), '%revision' => $this->revision->getRevisionId()]);
     $node_type = $this->nodeTypeStorage->load($this->revision->bundle())->label();
-    drupal_set_message(t('Revision from %revision-date of @type %title has been deleted.', array('%revision-date' => format_date($this->revision->getRevisionCreationTime()), '@type' => $node_type, '%title' => $this->revision->label())));
+    drupal_set_message(t('Revision from %revision-date of @type %title has been deleted.', ['%revision-date' => format_date($this->revision->getRevisionCreationTime()), '@type' => $node_type, '%title' => $this->revision->label()]));
     $form_state->setRedirect(
       'entity.node.canonical',
-      array('node' => $this->revision->id())
+      ['node' => $this->revision->id()]
     );
-    if ($this->connection->query('SELECT COUNT(DISTINCT vid) FROM {node_field_revision} WHERE nid = :nid', array(':nid' => $this->revision->id()))->fetchField() > 1) {
+    if ($this->connection->query('SELECT COUNT(DISTINCT vid) FROM {node_field_revision} WHERE nid = :nid', [':nid' => $this->revision->id()])->fetchField() > 1) {
       $form_state->setRedirect(
         'entity.node.version_history',
-        array('node' => $this->revision->id())
+        ['node' => $this->revision->id()]
       );
     }
   }
diff --git a/core/modules/node/src/Form/NodeRevisionRevertForm.php b/core/modules/node/src/Form/NodeRevisionRevertForm.php
index 275d55ba2232ef497127fb9a417397b7724fbee7..09aab6f543f3125b63e3e78b9b5af65dd13ea5d1 100644
--- a/core/modules/node/src/Form/NodeRevisionRevertForm.php
+++ b/core/modules/node/src/Form/NodeRevisionRevertForm.php
@@ -77,7 +77,7 @@ public function getQuestion() {
    * {@inheritdoc}
    */
   public function getCancelUrl() {
-    return new Url('entity.node.version_history', array('node' => $this->revision->id()));
+    return new Url('entity.node.version_history', ['node' => $this->revision->id()]);
   }
 
   /**
@@ -120,7 +120,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     drupal_set_message(t('@type %title has been reverted to the revision from %revision-date.', ['@type' => node_get_type_label($this->revision), '%title' => $this->revision->label(), '%revision-date' => $this->dateFormatter->format($original_revision_timestamp)]));
     $form_state->setRedirect(
       'entity.node.version_history',
-      array('node' => $this->revision->id())
+      ['node' => $this->revision->id()]
     );
   }
 
diff --git a/core/modules/node/src/Form/NodeRevisionRevertTranslationForm.php b/core/modules/node/src/Form/NodeRevisionRevertTranslationForm.php
index 05a4f6c41c7a8c91243e972866a044cbca290c9c..fd20dadce138d52863dbdfa887340d2206dd942e 100644
--- a/core/modules/node/src/Form/NodeRevisionRevertTranslationForm.php
+++ b/core/modules/node/src/Form/NodeRevisionRevertTranslationForm.php
@@ -82,11 +82,11 @@ public function buildForm(array $form, FormStateInterface $form_state, $node_rev
     $this->langcode = $langcode;
     $form = parent::buildForm($form, $form_state, $node_revision);
 
-    $form['revert_untranslated_fields'] = array(
+    $form['revert_untranslated_fields'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Revert content shared among translations'),
       '#default_value' => FALSE,
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/node/src/Form/NodeTypeDeleteConfirm.php b/core/modules/node/src/Form/NodeTypeDeleteConfirm.php
index 50abec1ad96664b98a263cf213889578749d0d2c..e4bea83fcb500b2087ea0ddac8506b162e202383 100644
--- a/core/modules/node/src/Form/NodeTypeDeleteConfirm.php
+++ b/core/modules/node/src/Form/NodeTypeDeleteConfirm.php
@@ -19,9 +19,9 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       ->count()
       ->execute();
     if ($num_nodes) {
-      $caption = '<p>' . $this->formatPlural($num_nodes, '%type is used by 1 piece of content on your site. You can not remove this content type until you have removed all of the %type content.', '%type is used by @count pieces of content on your site. You may not remove %type until you have removed all of the %type content.', array('%type' => $this->entity->label())) . '</p>';
+      $caption = '<p>' . $this->formatPlural($num_nodes, '%type is used by 1 piece of content on your site. You can not remove this content type until you have removed all of the %type content.', '%type is used by @count pieces of content on your site. You may not remove %type until you have removed all of the %type content.', ['%type' => $this->entity->label()]) . '</p>';
       $form['#title'] = $this->getQuestion();
-      $form['description'] = array('#markup' => $caption);
+      $form['description'] = ['#markup' => $caption];
       return $form;
     }
 
diff --git a/core/modules/node/src/NodeAccessControlHandler.php b/core/modules/node/src/NodeAccessControlHandler.php
index 89b816922d71fa861061443fefdc9253b7dd298e..a8a0bc6241e03a41ccbc64452f742293547ab676 100644
--- a/core/modules/node/src/NodeAccessControlHandler.php
+++ b/core/modules/node/src/NodeAccessControlHandler.php
@@ -73,7 +73,7 @@ public function access(EntityInterface $entity, $operation, AccountInterface $ac
   /**
    * {@inheritdoc}
    */
-  public function createAccess($entity_bundle = NULL, AccountInterface $account = NULL, array $context = array(), $return_as_object = FALSE) {
+  public function createAccess($entity_bundle = NULL, AccountInterface $account = NULL, array $context = [], $return_as_object = FALSE) {
     $account = $this->prepareUser($account);
 
     if ($account->hasPermission('bypass node access')) {
@@ -121,13 +121,13 @@ protected function checkCreateAccess(AccountInterface $account, array $context,
   protected function checkFieldAccess($operation, FieldDefinitionInterface $field_definition, AccountInterface $account, FieldItemListInterface $items = NULL) {
     // Only users with the administer nodes permission can edit administrative
     // fields.
-    $administrative_fields = array('uid', 'status', 'created', 'promote', 'sticky');
+    $administrative_fields = ['uid', 'status', 'created', 'promote', 'sticky'];
     if ($operation == 'edit' && in_array($field_definition->getName(), $administrative_fields, TRUE)) {
       return AccessResult::allowedIfHasPermission($account, 'administer nodes');
     }
 
     // No user can change read only fields.
-    $read_only_fields = array('revision_timestamp', 'revision_uid');
+    $read_only_fields = ['revision_timestamp', 'revision_uid'];
     if ($operation == 'edit' && in_array($field_definition->getName(), $read_only_fields, TRUE)) {
       return AccessResult::forbidden();
     }
@@ -147,12 +147,12 @@ protected function checkFieldAccess($operation, FieldDefinitionInterface $field_
    * {@inheritdoc}
    */
   public function acquireGrants(NodeInterface $node) {
-    $grants = $this->moduleHandler->invokeAll('node_access_records', array($node));
+    $grants = $this->moduleHandler->invokeAll('node_access_records', [$node]);
     // Let modules alter the grants.
     $this->moduleHandler->alter('node_access_records', $grants, $node);
     // If no grants are set and the node is published, then use the default grant.
     if (empty($grants) && $node->isPublished()) {
-      $grants[] = array('realm' => 'all', 'gid' => 0, 'grant_view' => 1, 'grant_update' => 0, 'grant_delete' => 0);
+      $grants[] = ['realm' => 'all', 'gid' => 0, 'grant_view' => 1, 'grant_update' => 0, 'grant_delete' => 0];
     }
     return $grants;
   }
diff --git a/core/modules/node/src/NodeForm.php b/core/modules/node/src/NodeForm.php
index bb58377d77039b9607a4f264170fecf85f0d45ca..9d2ce6d70f6dd07183be33a3f4dd86bdcc354222 100644
--- a/core/modules/node/src/NodeForm.php
+++ b/core/modules/node/src/NodeForm.php
@@ -86,33 +86,33 @@ public function form(array $form, FormStateInterface $form_state) {
     $node = $this->entity;
 
     if ($this->operation == 'edit') {
-      $form['#title'] = $this->t('<em>Edit @type</em> @title', array('@type' => node_get_type_label($node), '@title' => $node->label()));
+      $form['#title'] = $this->t('<em>Edit @type</em> @title', ['@type' => node_get_type_label($node), '@title' => $node->label()]);
     }
 
     // Changed must be sent to the client, for later overwrite error checking.
-    $form['changed'] = array(
+    $form['changed'] = [
       '#type' => 'hidden',
       '#default_value' => $node->getChangedTime(),
-    );
+    ];
 
     $form = parent::form($form, $form_state);
 
     $form['advanced']['#attributes']['class'][] = 'entity-meta';
 
     // Node author information for administrators.
-    $form['author'] = array(
+    $form['author'] = [
       '#type' => 'details',
       '#title' => t('Authoring information'),
       '#group' => 'advanced',
-      '#attributes' => array(
-        'class' => array('node-form-author'),
-      ),
-      '#attached' => array(
-        'library' => array('node/drupal.node'),
-      ),
+      '#attributes' => [
+        'class' => ['node-form-author'],
+      ],
+      '#attached' => [
+        'library' => ['node/drupal.node'],
+      ],
       '#weight' => 90,
       '#optional' => TRUE,
-    );
+    ];
 
     if (isset($form['uid'])) {
       $form['uid']['#group'] = 'author';
@@ -123,19 +123,19 @@ public function form(array $form, FormStateInterface $form_state) {
     }
 
     // Node options for administrators.
-    $form['options'] = array(
+    $form['options'] = [
       '#type' => 'details',
       '#title' => t('Promotion options'),
       '#group' => 'advanced',
-      '#attributes' => array(
-        'class' => array('node-form-options'),
-      ),
-      '#attached' => array(
-        'library' => array('node/drupal.node'),
-      ),
+      '#attributes' => [
+        'class' => ['node-form-options'],
+      ],
+      '#attached' => [
+        'library' => ['node/drupal.node'],
+      ],
       '#weight' => 95,
       '#optional' => TRUE,
-    );
+    ];
 
     if (isset($form['promote'])) {
       $form['promote']['#group'] = 'options';
@@ -236,13 +236,13 @@ protected function actions(array $form, FormStateInterface $form_state) {
       $element['submit']['#access'] = FALSE;
     }
 
-    $element['preview'] = array(
+    $element['preview'] = [
       '#type' => 'submit',
       '#access' => $preview_mode != DRUPAL_DISABLED && ($node->access('create') || $node->access('update')),
       '#value' => t('Preview'),
       '#weight' => 20,
-      '#submit' => array('::submitForm', '::preview'),
-    );
+      '#submit' => ['::submitForm', '::preview'],
+    ];
 
     $element['delete']['#access'] = $node->access('delete');
     $element['delete']['#weight'] = 100;
@@ -285,8 +285,8 @@ public function save(array $form, FormStateInterface $form_state) {
     $insert = $node->isNew();
     $node->save();
     $node_link = $node->link($this->t('View'));
-    $context = array('@type' => $node->getType(), '%title' => $node->label(), 'link' => $node_link);
-    $t_args = array('@type' => node_get_type_label($node), '%title' => $node->link($node->label()));
+    $context = ['@type' => $node->getType(), '%title' => $node->label(), 'link' => $node_link];
+    $t_args = ['@type' => node_get_type_label($node), '%title' => $node->link($node->label())];
 
     if ($insert) {
       $this->logger('content')->notice('@type: added %title.', $context);
@@ -303,7 +303,7 @@ public function save(array $form, FormStateInterface $form_state) {
       if ($node->access('view')) {
         $form_state->setRedirect(
           'entity.node.canonical',
-          array('node' => $node->id())
+          ['node' => $node->id()]
         );
       }
       else {
diff --git a/core/modules/node/src/NodeGrantDatabaseStorage.php b/core/modules/node/src/NodeGrantDatabaseStorage.php
index a0a13371a3d875265a9d05277435241e66222a88..993d0950d1a29a0e3899908c8030aaa452609a91 100644
--- a/core/modules/node/src/NodeGrantDatabaseStorage.php
+++ b/core/modules/node/src/NodeGrantDatabaseStorage.php
@@ -161,7 +161,7 @@ public function alterQuery($query, array $tables, $op, AccountInterface $account
       if (!($table instanceof SelectInterface) && $table == $base_table) {
         // Set the subquery.
         $subquery = $this->database->select('node_access', 'na')
-          ->fields('na', array('nid'));
+          ->fields('na', ['nid']);
 
         // If any grant exists for the specified user, then user has access to the
         // node for the specified operation.
@@ -202,13 +202,13 @@ public function write(NodeInterface $node, array $grants, $realm = NULL, $delete
     if ($delete) {
       $query = $this->database->delete('node_access')->condition('nid', $node->id());
       if ($realm) {
-        $query->condition('realm', array($realm, 'all'), 'IN');
+        $query->condition('realm', [$realm, 'all'], 'IN');
       }
       $query->execute();
     }
     // Only perform work when node_access modules are active.
     if (!empty($grants) && count($this->moduleHandler->getImplementations('node_grants'))) {
-      $query = $this->database->insert('node_access')->fields(array('nid', 'langcode', 'fallback', 'realm', 'gid', 'grant_view', 'grant_update', 'grant_delete'));
+      $query = $this->database->insert('node_access')->fields(['nid', 'langcode', 'fallback', 'realm', 'gid', 'grant_view', 'grant_update', 'grant_delete']);
       // If we have defined a granted langcode, use it. But if not, add a grant
       // for every language this node is translated to.
       foreach ($grants as $grant) {
@@ -216,7 +216,7 @@ public function write(NodeInterface $node, array $grants, $realm = NULL, $delete
           continue;
         }
         if (isset($grant['langcode'])) {
-          $grant_languages = array($grant['langcode'] => $this->languageManager->getLanguage($grant['langcode']));
+          $grant_languages = [$grant['langcode'] => $this->languageManager->getLanguage($grant['langcode'])];
         }
         else {
           $grant_languages = $node->getTranslationLanguages(TRUE);
@@ -253,14 +253,14 @@ public function delete() {
    */
   public function writeDefault() {
     $this->database->insert('node_access')
-      ->fields(array(
+      ->fields([
           'nid' => 0,
           'realm' => 'all',
           'gid' => 0,
           'grant_view' => 1,
           'grant_update' => 0,
           'grant_delete' => 0,
-        ))
+        ])
       ->execute();
   }
 
diff --git a/core/modules/node/src/NodeListBuilder.php b/core/modules/node/src/NodeListBuilder.php
index 921ac9f3709f2a2efdd149b1a915648071d1f356..62666497e877b55c73602eba554cee3eb66eda0f 100644
--- a/core/modules/node/src/NodeListBuilder.php
+++ b/core/modules/node/src/NodeListBuilder.php
@@ -68,27 +68,27 @@ public static function createInstance(ContainerInterface $container, EntityTypeI
    */
   public function buildHeader() {
     // Enable language column and filter if multiple languages are added.
-    $header = array(
+    $header = [
       'title' => $this->t('Title'),
-      'type' => array(
+      'type' => [
         'data' => $this->t('Content type'),
-        'class' => array(RESPONSIVE_PRIORITY_MEDIUM),
-      ),
-      'author' => array(
+        'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+      ],
+      'author' => [
         'data' => $this->t('Author'),
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      ),
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ],
       'status' => $this->t('Status'),
-      'changed' => array(
+      'changed' => [
         'data' => $this->t('Updated'),
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      ),
-    );
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ],
+    ];
     if (\Drupal::languageManager()->isMultilingual()) {
-      $header['language_name'] = array(
+      $header['language_name'] = [
         'data' => $this->t('Language'),
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      );
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ];
     }
     return $header + parent::buildHeader();
   }
@@ -98,26 +98,26 @@ public function buildHeader() {
    */
   public function buildRow(EntityInterface $entity) {
     /** @var \Drupal\node\NodeInterface $entity */
-    $mark = array(
+    $mark = [
       '#theme' => 'mark',
       '#mark_type' => node_mark($entity->id(), $entity->getChangedTime()),
-    );
+    ];
     $langcode = $entity->language()->getId();
     $uri = $entity->urlInfo();
     $options = $uri->getOptions();
-    $options += ($langcode != LanguageInterface::LANGCODE_NOT_SPECIFIED && isset($languages[$langcode]) ? array('language' => $languages[$langcode]) : array());
+    $options += ($langcode != LanguageInterface::LANGCODE_NOT_SPECIFIED && isset($languages[$langcode]) ? ['language' => $languages[$langcode]] : []);
     $uri->setOptions($options);
-    $row['title']['data'] = array(
+    $row['title']['data'] = [
       '#type' => 'link',
       '#title' => $entity->label(),
       '#suffix' => ' ' . drupal_render($mark),
       '#url' => $uri,
-    );
+    ];
     $row['type'] = node_get_type_label($entity);
-    $row['author']['data'] = array(
+    $row['author']['data'] = [
       '#theme' => 'username',
       '#account' => $entity->getOwner(),
-    );
+    ];
     $row['status'] = $entity->isPublished() ? $this->t('published') : $this->t('not published');
     $row['changed'] = $this->dateFormatter->format($entity->getChangedTime(), 'short');
     $language_manager = \Drupal::languageManager();
diff --git a/core/modules/node/src/NodePermissions.php b/core/modules/node/src/NodePermissions.php
index 0bc0cde411740790ad8bbdbae4b5e819b0c8e6c8..1996360ae1f1c592b7c5c9d7476abc6697a2d178 100644
--- a/core/modules/node/src/NodePermissions.php
+++ b/core/modules/node/src/NodePermissions.php
@@ -22,7 +22,7 @@ class NodePermissions {
    *   @see \Drupal\user\PermissionHandlerInterface::getPermissions()
    */
   public function nodeTypePermissions() {
-    $perms = array();
+    $perms = [];
     // Generate node permissions for all node types.
     foreach (NodeType::loadMultiple() as $type) {
       $perms += $this->buildPermissions($type);
@@ -42,37 +42,37 @@ public function nodeTypePermissions() {
    */
   protected function buildPermissions(NodeType $type) {
     $type_id = $type->id();
-    $type_params = array('%type_name' => $type->label());
+    $type_params = ['%type_name' => $type->label()];
 
-    return array(
-      "create $type_id content" => array(
+    return [
+      "create $type_id content" => [
         'title' => $this->t('%type_name: Create new content', $type_params),
-      ),
-      "edit own $type_id content" => array(
+      ],
+      "edit own $type_id content" => [
         'title' => $this->t('%type_name: Edit own content', $type_params),
-      ),
-      "edit any $type_id content" => array(
+      ],
+      "edit any $type_id content" => [
         'title' => $this->t('%type_name: Edit any content', $type_params),
-      ),
-      "delete own $type_id content" => array(
+      ],
+      "delete own $type_id content" => [
         'title' => $this->t('%type_name: Delete own content', $type_params),
-      ),
-      "delete any $type_id content" => array(
+      ],
+      "delete any $type_id content" => [
         'title' => $this->t('%type_name: Delete any content', $type_params),
-      ),
-      "view $type_id revisions" => array(
+      ],
+      "view $type_id revisions" => [
         'title' => $this->t('%type_name: View revisions', $type_params),
         'description' => t('To view a revision, you also need permission to view the content item.'),
-      ),
-      "revert $type_id revisions" => array(
+      ],
+      "revert $type_id revisions" => [
         'title' => $this->t('%type_name: Revert revisions', $type_params),
         'description' => t('To revert a revision, you also need permission to edit the content item.'),
-      ),
-      "delete $type_id revisions" => array(
+      ],
+      "delete $type_id revisions" => [
         'title' => $this->t('%type_name: Delete revisions', $type_params),
         'description' => $this->t('To delete a revision, you also need permission to delete the content item.'),
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/node/src/NodeStorage.php b/core/modules/node/src/NodeStorage.php
index 3c7209307ed57f538b55be311a520b50995b0927..af85a067d991fb01f5d5e10820f6cbe66721b9f7 100644
--- a/core/modules/node/src/NodeStorage.php
+++ b/core/modules/node/src/NodeStorage.php
@@ -20,7 +20,7 @@ class NodeStorage extends SqlContentEntityStorage implements NodeStorageInterfac
   public function revisionIds(NodeInterface $node) {
     return $this->database->query(
       'SELECT vid FROM {node_revision} WHERE nid=:nid ORDER BY vid',
-      array(':nid' => $node->id())
+      [':nid' => $node->id()]
     )->fetchCol();
   }
 
@@ -30,7 +30,7 @@ public function revisionIds(NodeInterface $node) {
   public function userRevisionIds(AccountInterface $account) {
     return $this->database->query(
       'SELECT vid FROM {node_field_revision} WHERE uid = :uid ORDER BY vid',
-      array(':uid' => $account->id())
+      [':uid' => $account->id()]
     )->fetchCol();
   }
 
@@ -38,7 +38,7 @@ public function userRevisionIds(AccountInterface $account) {
    * {@inheritdoc}
    */
   public function countDefaultLanguageRevisions(NodeInterface $node) {
-    return $this->database->query('SELECT COUNT(*) FROM {node_field_revision} WHERE nid = :nid AND default_langcode = 1', array(':nid' => $node->id()))->fetchField();
+    return $this->database->query('SELECT COUNT(*) FROM {node_field_revision} WHERE nid = :nid AND default_langcode = 1', [':nid' => $node->id()])->fetchField();
   }
 
   /**
@@ -46,7 +46,7 @@ public function countDefaultLanguageRevisions(NodeInterface $node) {
    */
   public function updateType($old_type, $new_type) {
     return $this->database->update('node')
-      ->fields(array('type' => $new_type))
+      ->fields(['type' => $new_type])
       ->condition('type', $old_type)
       ->execute();
   }
@@ -56,7 +56,7 @@ public function updateType($old_type, $new_type) {
    */
   public function clearRevisionsLanguage(LanguageInterface $language) {
     return $this->database->update('node_revision')
-      ->fields(array('langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED))
+      ->fields(['langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED])
       ->condition('langcode', $language->getId())
       ->execute();
   }
diff --git a/core/modules/node/src/NodeStorageSchema.php b/core/modules/node/src/NodeStorageSchema.php
index 18d6303458afe1c66705f7af06328880b1437a61..ac45bb5d1ef408a78f306bcbc3975f87b2417aca 100644
--- a/core/modules/node/src/NodeStorageSchema.php
+++ b/core/modules/node/src/NodeStorageSchema.php
@@ -17,10 +17,10 @@ class NodeStorageSchema extends SqlContentEntityStorageSchema {
   protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $reset = FALSE) {
     $schema = parent::getEntitySchema($entity_type, $reset);
 
-    $schema['node_field_data']['indexes'] += array(
-      'node__frontpage' => array('promote', 'status', 'sticky', 'created'),
-      'node__title_type' => array('title', array('type', 4)),
-    );
+    $schema['node_field_data']['indexes'] += [
+      'node__frontpage' => ['promote', 'status', 'sticky', 'created'],
+      'node__title_type' => ['title', ['type', 4]],
+    ];
 
     return $schema;
   }
diff --git a/core/modules/node/src/NodeTranslationHandler.php b/core/modules/node/src/NodeTranslationHandler.php
index 2f6d2abfd938e4901c80f243c46f6c17c3088787..ead0d5d5fafb37f68bbcd95ed226f1e88ab42753 100644
--- a/core/modules/node/src/NodeTranslationHandler.php
+++ b/core/modules/node/src/NodeTranslationHandler.php
@@ -39,7 +39,7 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
         }
       }
       if (isset($status_translatable)) {
-        foreach (array('publish', 'unpublish', 'submit') as $button) {
+        foreach (['publish', 'unpublish', 'submit'] as $button) {
           if (isset($form['actions'][$button])) {
             $form['actions'][$button]['#value'] .= ' ' . ($status_translatable ? t('(this translation)') : t('(all translations)'));
           }
@@ -53,7 +53,7 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
    */
   protected function entityFormTitle(EntityInterface $entity) {
     $type_name = node_get_type_label($entity);
-    return t('<em>Edit @type</em> @title', array('@type' => $type_name, '@title' => $entity->label()));
+    return t('<em>Edit @type</em> @title', ['@type' => $type_name, '@title' => $entity->label()]);
   }
 
   /**
diff --git a/core/modules/node/src/NodeTypeForm.php b/core/modules/node/src/NodeTypeForm.php
index d5fb99822e3ca1d3f84113b397baf57e2270bd18..abef502e1e546673ec4c01df79f1368b8fa63e8f 100644
--- a/core/modules/node/src/NodeTypeForm.php
+++ b/core/modules/node/src/NodeTypeForm.php
@@ -54,134 +54,134 @@ public function form(array $form, FormStateInterface $form_state) {
       // get the default values for workflow settings.
       // @todo Make it possible to get default values without an entity.
       //   https://www.drupal.org/node/2318187
-      $node = $this->entityManager->getStorage('node')->create(array('type' => $type->uuid()));
+      $node = $this->entityManager->getStorage('node')->create(['type' => $type->uuid()]);
     }
     else {
-      $form['#title'] = $this->t('Edit %label content type', array('%label' => $type->label()));
+      $form['#title'] = $this->t('Edit %label content type', ['%label' => $type->label()]);
       $fields = $this->entityManager->getFieldDefinitions('node', $type->id());
       // Create a node to get the current values for workflow settings fields.
-      $node = $this->entityManager->getStorage('node')->create(array('type' => $type->id()));
+      $node = $this->entityManager->getStorage('node')->create(['type' => $type->id()]);
     }
 
-    $form['name'] = array(
+    $form['name'] = [
       '#title' => t('Name'),
       '#type' => 'textfield',
       '#default_value' => $type->label(),
       '#description' => t('The human-readable name of this content type. This text will be displayed as part of the list on the <em>Add content</em> page. This name must be unique.'),
       '#required' => TRUE,
       '#size' => 30,
-    );
+    ];
 
-    $form['type'] = array(
+    $form['type'] = [
       '#type' => 'machine_name',
       '#default_value' => $type->id(),
       '#maxlength' => EntityTypeInterface::BUNDLE_MAX_LENGTH,
       '#disabled' => $type->isLocked(),
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => ['Drupal\node\Entity\NodeType', 'load'],
-        'source' => array('name'),
-      ),
-      '#description' => t('A unique machine-readable name for this content type. It must only contain lowercase letters, numbers, and underscores. This name will be used for constructing the URL of the %node-add page, in which underscores will be converted into hyphens.', array(
+        'source' => ['name'],
+      ],
+      '#description' => t('A unique machine-readable name for this content type. It must only contain lowercase letters, numbers, and underscores. This name will be used for constructing the URL of the %node-add page, in which underscores will be converted into hyphens.', [
         '%node-add' => t('Add content'),
-      )),
-    );
+      ]),
+    ];
 
-    $form['description'] = array(
+    $form['description'] = [
       '#title' => t('Description'),
       '#type' => 'textarea',
       '#default_value' => $type->getDescription(),
       '#description' => t('This text will be displayed on the <em>Add new content</em> page.'),
-    );
+    ];
 
-    $form['additional_settings'] = array(
+    $form['additional_settings'] = [
       '#type' => 'vertical_tabs',
-      '#attached' => array(
-        'library' => array('node/drupal.content_types'),
-      ),
-    );
+      '#attached' => [
+        'library' => ['node/drupal.content_types'],
+      ],
+    ];
 
-    $form['submission'] = array(
+    $form['submission'] = [
       '#type' => 'details',
       '#title' => t('Submission form settings'),
       '#group' => 'additional_settings',
       '#open' => TRUE,
-    );
-    $form['submission']['title_label'] = array(
+    ];
+    $form['submission']['title_label'] = [
       '#title' => t('Title field label'),
       '#type' => 'textfield',
       '#default_value' => $fields['title']->getLabel(),
       '#required' => TRUE,
-    );
-    $form['submission']['preview_mode'] = array(
+    ];
+    $form['submission']['preview_mode'] = [
       '#type' => 'radios',
       '#title' => t('Preview before submitting'),
       '#default_value' => $type->getPreviewMode(),
-      '#options' => array(
+      '#options' => [
         DRUPAL_DISABLED => t('Disabled'),
         DRUPAL_OPTIONAL => t('Optional'),
         DRUPAL_REQUIRED => t('Required'),
-      ),
-    );
-    $form['submission']['help']  = array(
+      ],
+    ];
+    $form['submission']['help']  = [
       '#type' => 'textarea',
       '#title' => t('Explanation or submission guidelines'),
       '#default_value' => $type->getHelp(),
       '#description' => t('This text will be displayed at the top of the page when creating or editing content of this type.'),
-    );
-    $form['workflow'] = array(
+    ];
+    $form['workflow'] = [
       '#type' => 'details',
       '#title' => t('Publishing options'),
       '#group' => 'additional_settings',
-    );
-    $workflow_options = array(
+    ];
+    $workflow_options = [
       'status' => $node->status->value,
       'promote' => $node->promote->value,
       'sticky' => $node->sticky->value,
       'revision' => $type->isNewRevision(),
-    );
+    ];
     // Prepare workflow options to be used for 'checkboxes' form element.
     $keys = array_keys(array_filter($workflow_options));
     $workflow_options = array_combine($keys, $keys);
-    $form['workflow']['options'] = array(
+    $form['workflow']['options'] = [
       '#type' => 'checkboxes',
       '#title' => t('Default options'),
       '#default_value' => $workflow_options,
-      '#options' => array(
+      '#options' => [
         'status' => t('Published'),
         'promote' => t('Promoted to front page'),
         'sticky' => t('Sticky at top of lists'),
         'revision' => t('Create new revision'),
-      ),
+      ],
       '#description' => t('Users with the <em>Administer content</em> permission will be able to override these options.'),
-    );
+    ];
     if ($this->moduleHandler->moduleExists('language')) {
-      $form['language'] = array(
+      $form['language'] = [
         '#type' => 'details',
         '#title' => t('Language settings'),
         '#group' => 'additional_settings',
-      );
+      ];
 
       $language_configuration = ContentLanguageSettings::loadByEntityTypeBundle('node', $type->id());
-      $form['language']['language_configuration'] = array(
+      $form['language']['language_configuration'] = [
         '#type' => 'language_configuration',
-        '#entity_information' => array(
+        '#entity_information' => [
           'entity_type' => 'node',
           'bundle' => $type->id(),
-        ),
+        ],
         '#default_value' => $language_configuration,
-      );
+      ];
     }
-    $form['display'] = array(
+    $form['display'] = [
       '#type' => 'details',
       '#title' => t('Display settings'),
       '#group' => 'additional_settings',
-    );
-    $form['display']['display_submitted'] = array(
+    ];
+    $form['display']['display_submitted'] = [
       '#type' => 'checkbox',
       '#title' => t('Display author and date information'),
       '#default_value' => $type->displaySubmitted(),
       '#description' => t('Author username and publish date will be displayed.'),
-    );
+    ];
 
     return $this->protectBundleIdElement($form);
   }
@@ -205,7 +205,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
     $id = trim($form_state->getValue('type'));
     // '0' is invalid, since elsewhere we check it using empty().
     if ($id == '0') {
-      $form_state->setErrorByName('type', $this->t("Invalid machine-readable name. Enter a name other than %invalid.", array('%invalid' => $id)));
+      $form_state->setErrorByName('type', $this->t("Invalid machine-readable name. Enter a name other than %invalid.", ['%invalid' => $id]));
     }
   }
 
@@ -214,13 +214,13 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
    */
   public function save(array $form, FormStateInterface $form_state) {
     $type = $this->entity;
-    $type->setNewRevision($form_state->getValue(array('options', 'revision')));
+    $type->setNewRevision($form_state->getValue(['options', 'revision']));
     $type->set('type', trim($type->id()));
     $type->set('name', trim($type->label()));
 
     $status = $type->save();
 
-    $t_args = array('%name' => $type->label());
+    $t_args = ['%name' => $type->label()];
 
     if ($status == SAVED_UPDATED) {
       drupal_set_message(t('The content type %name has been updated.', $t_args));
@@ -228,7 +228,7 @@ public function save(array $form, FormStateInterface $form_state) {
     elseif ($status == SAVED_NEW) {
       node_add_body_field($type);
       drupal_set_message(t('The content type %name has been added.', $t_args));
-      $context = array_merge($t_args, array('link' => $type->link($this->t('View'), 'collection')));
+      $context = array_merge($t_args, ['link' => $type->link($this->t('View'), 'collection')]);
       $this->logger('node')->notice('Added content type %name.', $context);
     }
 
@@ -242,8 +242,8 @@ public function save(array $form, FormStateInterface $form_state) {
     // Update workflow options.
     // @todo Make it possible to get default values without an entity.
     //   https://www.drupal.org/node/2318187
-    $node = $this->entityManager->getStorage('node')->create(array('type' => $type->id()));
-    foreach (array('status', 'promote', 'sticky') as $field_name) {
+    $node = $this->entityManager->getStorage('node')->create(['type' => $type->id()]);
+    foreach (['status', 'promote', 'sticky'] as $field_name) {
       $value = (bool) $form_state->getValue(['options', $field_name]);
       if ($node->$field_name->value != $value) {
         $fields[$field_name]->getConfig($type->id())->setDefaultValue($value)->save();
diff --git a/core/modules/node/src/NodeTypeListBuilder.php b/core/modules/node/src/NodeTypeListBuilder.php
index bdd08745b27f5fd8c0f5afabbe17a0ec5563ded4..be6e5f638b909a37e6dd288ca01160ca4731fd99 100644
--- a/core/modules/node/src/NodeTypeListBuilder.php
+++ b/core/modules/node/src/NodeTypeListBuilder.php
@@ -18,10 +18,10 @@ class NodeTypeListBuilder extends ConfigEntityListBuilder {
    */
   public function buildHeader() {
     $header['title'] = t('Name');
-    $header['description'] = array(
+    $header['description'] = [
       'data' => t('Description'),
-      'class' => array(RESPONSIVE_PRIORITY_MEDIUM),
-    );
+      'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+    ];
     return $header + parent::buildHeader();
   }
 
@@ -29,10 +29,10 @@ public function buildHeader() {
    * {@inheritdoc}
    */
   public function buildRow(EntityInterface $entity) {
-    $row['title'] = array(
+    $row['title'] = [
       'data' => $entity->label(),
-      'class' => array('menu-label'),
-    );
+      'class' => ['menu-label'],
+    ];
     $row['description']['data'] = ['#markup' => $entity->getDescription()];
     return $row + parent::buildRow($entity);
   }
diff --git a/core/modules/node/src/NodeViewBuilder.php b/core/modules/node/src/NodeViewBuilder.php
index c65250ee9082a48b9bda8a5508bbcc2cf9a32a78..f96302bef3b459ea63426e885294b021713d579c 100644
--- a/core/modules/node/src/NodeViewBuilder.php
+++ b/core/modules/node/src/NodeViewBuilder.php
@@ -28,25 +28,25 @@ public function buildComponents(array &$build, array $entities, array $displays,
       $display = $displays[$bundle];
 
       if ($display->getComponent('links')) {
-        $build[$id]['links'] = array(
+        $build[$id]['links'] = [
           '#lazy_builder' => [get_called_class() . '::renderLinks', [
             $entity->id(),
             $view_mode,
             $entity->language()->getId(),
             !empty($entity->in_preview),
           ]],
-        );
+        ];
       }
 
       // Add Language field text element to node render array.
       if ($display->getComponent('langcode')) {
-        $build[$id]['langcode'] = array(
+        $build[$id]['langcode'] = [
           '#type' => 'item',
           '#title' => t('Language'),
           '#markup' => $entity->language()->getName(),
           '#prefix' => '<div id="field-language-display">',
           '#suffix' => '</div>'
-        );
+        ];
       }
     }
   }
@@ -81,21 +81,21 @@ protected function getBuildDefaults(EntityInterface $entity, $view_mode) {
    *   A renderable array representing the node links.
    */
   public static function renderLinks($node_entity_id, $view_mode, $langcode, $is_in_preview) {
-    $links = array(
+    $links = [
       '#theme' => 'links__node',
-      '#pre_render' => array('drupal_pre_render_links'),
-      '#attributes' => array('class' => array('links', 'inline')),
-    );
+      '#pre_render' => ['drupal_pre_render_links'],
+      '#attributes' => ['class' => ['links', 'inline']],
+    ];
 
     if (!$is_in_preview) {
       $entity = Node::load($node_entity_id)->getTranslation($langcode);
       $links['node'] = static::buildLinks($entity, $view_mode);
 
       // Allow other modules to alter the node links.
-      $hook_context = array(
+      $hook_context = [
         'view_mode' => $view_mode,
         'langcode' => $langcode,
-      );
+      ];
       \Drupal::moduleHandler()->alter('node_links', $links, $entity, $hook_context);
     }
     return $links;
@@ -113,30 +113,30 @@ public static function renderLinks($node_entity_id, $view_mode, $langcode, $is_i
    *   An array that can be processed by drupal_pre_render_links().
    */
   protected static function buildLinks(NodeInterface $entity, $view_mode) {
-    $links = array();
+    $links = [];
 
     // Always display a read more link on teasers because we have no way
     // to know when a teaser view is different than a full view.
     if ($view_mode == 'teaser') {
       $node_title_stripped = strip_tags($entity->label());
-      $links['node-readmore'] = array(
-        'title' => t('Read more<span class="visually-hidden"> about @title</span>', array(
+      $links['node-readmore'] = [
+        'title' => t('Read more<span class="visually-hidden"> about @title</span>', [
           '@title' => $node_title_stripped,
-        )),
+        ]),
         'url' => $entity->urlInfo(),
         'language' => $entity->language(),
-        'attributes' => array(
+        'attributes' => [
           'rel' => 'tag',
           'title' => $node_title_stripped,
-        ),
-      );
+        ],
+      ];
     }
 
-    return array(
+    return [
       '#theme' => 'links__node__node',
       '#links' => $links,
-      '#attributes' => array('class' => array('links', 'inline')),
-    );
+      '#attributes' => ['class' => ['links', 'inline']],
+    ];
   }
 
   /**
diff --git a/core/modules/node/src/NodeViewsData.php b/core/modules/node/src/NodeViewsData.php
index 21e1e44b2d57f8a5f075de4def5db55a1338b10a..b5aebf48fa22ee478b6c9c4753a51803bff7429f 100644
--- a/core/modules/node/src/NodeViewsData.php
+++ b/core/modules/node/src/NodeViewsData.php
@@ -39,15 +39,15 @@ public function getViewsData() {
     // Use status = 1 instead of status <> 0 in WHERE statement.
     $data['node_field_data']['status']['filter']['use_equal'] = TRUE;
 
-    $data['node_field_data']['status_extra'] = array(
+    $data['node_field_data']['status_extra'] = [
       'title' => $this->t('Published status or admin user'),
       'help' => $this->t('Filters out unpublished content if the current user cannot view it.'),
-      'filter' => array(
+      'filter' => [
         'field' => 'status',
         'id' => 'node_status',
         'label' => $this->t('Published status or admin user'),
-      ),
-    );
+      ],
+    ];
 
     $data['node_field_data']['promote']['help'] = $this->t('A boolean indicating whether the node is visible on the front page.');
     $data['node_field_data']['promote']['filter']['label'] = $this->t('Promoted to front page status');
@@ -58,133 +58,133 @@ public function getViewsData() {
     $data['node_field_data']['sticky']['filter']['type'] = 'yes-no';
     $data['node_field_data']['sticky']['sort']['help'] = $this->t('Whether or not the content is sticky. To list sticky content first, set this to descending.');
 
-    $data['node']['path'] = array(
-      'field' => array(
+    $data['node']['path'] = [
+      'field' => [
         'title' => $this->t('Path'),
         'help' => $this->t('The aliased path to this content.'),
         'id' => 'node_path',
-      ),
-    );
+      ],
+    ];
 
-    $data['node']['node_bulk_form'] = array(
+    $data['node']['node_bulk_form'] = [
       'title' => $this->t('Node operations bulk form'),
       'help' => $this->t('Add a form element that lets you run operations on multiple nodes.'),
-      'field' => array(
+      'field' => [
         'id' => 'node_bulk_form',
-      ),
-    );
+      ],
+    ];
 
     // Bogus fields for aliasing purposes.
 
     // @todo Add similar support to any date field
     // @see https://www.drupal.org/node/2337507
-    $data['node_field_data']['created_fulldate'] = array(
+    $data['node_field_data']['created_fulldate'] = [
       'title' => $this->t('Created date'),
       'help' => $this->t('Date in the form of CCYYMMDD.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_fulldate',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['created_year_month'] = array(
+    $data['node_field_data']['created_year_month'] = [
       'title' => $this->t('Created year + month'),
       'help' => $this->t('Date in the form of YYYYMM.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_year_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['created_year'] = array(
+    $data['node_field_data']['created_year'] = [
       'title' => $this->t('Created year'),
       'help' => $this->t('Date in the form of YYYY.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_year',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['created_month'] = array(
+    $data['node_field_data']['created_month'] = [
       'title' => $this->t('Created month'),
       'help' => $this->t('Date in the form of MM (01 - 12).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['created_day'] = array(
+    $data['node_field_data']['created_day'] = [
       'title' => $this->t('Created day'),
       'help' => $this->t('Date in the form of DD (01 - 31).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_day',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['created_week'] = array(
+    $data['node_field_data']['created_week'] = [
       'title' => $this->t('Created week'),
       'help' => $this->t('Date in the form of WW (01 - 53).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_week',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['changed_fulldate'] = array(
+    $data['node_field_data']['changed_fulldate'] = [
       'title' => $this->t('Updated date'),
       'help' => $this->t('Date in the form of CCYYMMDD.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_fulldate',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['changed_year_month'] = array(
+    $data['node_field_data']['changed_year_month'] = [
       'title' => $this->t('Updated year + month'),
       'help' => $this->t('Date in the form of YYYYMM.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_year_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['changed_year'] = array(
+    $data['node_field_data']['changed_year'] = [
       'title' => $this->t('Updated year'),
       'help' => $this->t('Date in the form of YYYY.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_year',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['changed_month'] = array(
+    $data['node_field_data']['changed_month'] = [
       'title' => $this->t('Updated month'),
       'help' => $this->t('Date in the form of MM (01 - 12).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['changed_day'] = array(
+    $data['node_field_data']['changed_day'] = [
       'title' => $this->t('Updated day'),
       'help' => $this->t('Date in the form of DD (01 - 31).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_day',
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_data']['changed_week'] = array(
+    $data['node_field_data']['changed_week'] = [
       'title' => $this->t('Updated week'),
       'help' => $this->t('Date in the form of WW (01 - 53).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_week',
-      ),
-    );
+      ],
+    ];
 
     $data['node_field_data']['uid']['help'] = $this->t('The user authoring the content. If you need more fields than the uid add the content: author relationship');
     $data['node_field_data']['uid']['filter']['id'] = 'user_name';
@@ -192,13 +192,13 @@ public function getViewsData() {
     $data['node_field_data']['uid']['relationship']['help'] = $this->t('Relate content to the user who created it.');
     $data['node_field_data']['uid']['relationship']['label'] = $this->t('author');
 
-    $data['node']['node_listing_empty'] = array(
+    $data['node']['node_listing_empty'] = [
       'title' => $this->t('Empty Node Frontpage behavior'),
       'help' => $this->t('Provides a link to the node add overview page.'),
-      'area' => array(
+      'area' => [
         'id' => 'node_listing_empty',
-      ),
-    );
+      ],
+    ];
 
     $data['node_field_data']['uid_revision']['title'] = $this->t('User has a revision');
     $data['node_field_data']['uid_revision']['help'] = $this->t('All nodes where a certain user has a revision');
@@ -225,19 +225,19 @@ public function getViewsData() {
     $data['node_field_revision']['nid']['relationship']['title'] = $this->t('Content');
     $data['node_field_revision']['nid']['relationship']['label'] = $this->t('Get the actual content from a content revision.');
 
-    $data['node_field_revision']['vid'] = array(
-      'argument' => array(
+    $data['node_field_revision']['vid'] = [
+      'argument' => [
         'id' => 'node_vid',
         'numeric' => TRUE,
-      ),
-      'relationship' => array(
+      ],
+      'relationship' => [
         'id' => 'standard',
         'base' => 'node_field_data',
         'base field' => 'vid',
         'title' => $this->t('Content'),
         'label' => $this->t('Get the actual content from a content revision.'),
-      ),
-    ) + $data['node_field_revision']['vid'];
+      ],
+    ] + $data['node_field_revision']['vid'];
 
     $data['node_field_revision']['langcode']['help'] = $this->t('The language the original content is in.');
 
@@ -259,52 +259,52 @@ public function getViewsData() {
 
     $data['node_field_revision']['langcode']['help'] = $this->t('The language of the content or translation.');
 
-    $data['node_field_revision']['link_to_revision'] = array(
-      'field' => array(
+    $data['node_field_revision']['link_to_revision'] = [
+      'field' => [
         'title' => $this->t('Link to revision'),
         'help' => $this->t('Provide a simple link to the revision.'),
         'id' => 'node_revision_link',
         'click sortable' => FALSE,
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_revision']['revert_revision'] = array(
-      'field' => array(
+    $data['node_field_revision']['revert_revision'] = [
+      'field' => [
         'title' => $this->t('Link to revert revision'),
         'help' => $this->t('Provide a simple link to revert to the revision.'),
         'id' => 'node_revision_link_revert',
         'click sortable' => FALSE,
-      ),
-    );
+      ],
+    ];
 
-    $data['node_field_revision']['delete_revision'] = array(
-      'field' => array(
+    $data['node_field_revision']['delete_revision'] = [
+      'field' => [
         'title' => $this->t('Link to delete revision'),
         'help' => $this->t('Provide a simple link to delete the content revision.'),
         'id' => 'node_revision_link_delete',
         'click sortable' => FALSE,
-      ),
-    );
+      ],
+    ];
 
     // Define the base group of this table. Fields that don't have a group defined
     // will go into this field by default.
     $data['node_access']['table']['group']  = $this->t('Content access');
 
     // For other base tables, explain how we join.
-    $data['node_access']['table']['join'] = array(
-      'node_field_data' => array(
+    $data['node_access']['table']['join'] = [
+      'node_field_data' => [
         'left_field' => 'nid',
         'field' => 'nid',
-      ),
-    );
-    $data['node_access']['nid'] = array(
+      ],
+    ];
+    $data['node_access']['nid'] = [
       'title' => $this->t('Access'),
       'help' => $this->t('Filter by access.'),
-      'filter' => array(
+      'filter' => [
         'id' => 'node_access',
         'help' => $this->t('Filter for content by view access. <strong>Not necessary if you are using node as your base table.</strong>'),
-      ),
-    );
+      ],
+    ];
 
     // Add search table, fields, filters, etc., but only if a page using the
     // node_search plugin is enabled.
@@ -324,61 +324,61 @@ public function getViewsData() {
         // Automatically join to the node table (or actually, node_field_data).
         // Use a Views table alias to allow other modules to use this table too,
         // if they use the search index.
-        $data['node_search_index']['table']['join'] = array(
-          'node_field_data' => array(
+        $data['node_search_index']['table']['join'] = [
+          'node_field_data' => [
             'left_field' => 'nid',
             'field' => 'sid',
             'table' => 'search_index',
             'extra' => "node_search_index.type = 'node_search' AND node_search_index.langcode = node_field_data.langcode",
-          )
-        );
+          ]
+        ];
 
-        $data['node_search_total']['table']['join'] = array(
-          'node_search_index' => array(
+        $data['node_search_total']['table']['join'] = [
+          'node_search_index' => [
             'left_field' => 'word',
             'field' => 'word',
-          ),
-        );
+          ],
+        ];
 
-        $data['node_search_dataset']['table']['join'] = array(
-          'node_field_data' => array(
+        $data['node_search_dataset']['table']['join'] = [
+          'node_field_data' => [
             'left_field' => 'sid',
             'left_table' => 'node_search_index',
             'field' => 'sid',
             'table' => 'search_dataset',
             'extra' => 'node_search_index.type = node_search_dataset.type AND node_search_index.langcode = node_search_dataset.langcode',
             'type' => 'INNER',
-          ),
-        );
+          ],
+        ];
 
-        $data['node_search_index']['score'] = array(
+        $data['node_search_index']['score'] = [
           'title' => $this->t('Score'),
           'help' => $this->t('The score of the search item. This will not be used if the search filter is not also present.'),
-          'field' => array(
+          'field' => [
             'id' => 'search_score',
             'float' => TRUE,
             'no group by' => TRUE,
-          ),
-          'sort' => array(
+          ],
+          'sort' => [
             'id' => 'search_score',
             'no group by' => TRUE,
-          ),
-        );
+          ],
+        ];
 
-        $data['node_search_index']['keys'] = array(
+        $data['node_search_index']['keys'] = [
           'title' => $this->t('Search Keywords'),
           'help' => $this->t('The keywords to search for.'),
-          'filter' => array(
+          'filter' => [
             'id' => 'search_keywords',
             'no group by' => TRUE,
             'search_type' => 'node_search',
-          ),
-          'argument' => array(
+          ],
+          'argument' => [
             'id' => 'search',
             'no group by' => TRUE,
             'search_type' => 'node_search',
-          ),
-        );
+          ],
+        ];
 
       }
     }
diff --git a/core/modules/node/src/Plugin/Action/AssignOwnerNode.php b/core/modules/node/src/Plugin/Action/AssignOwnerNode.php
index 7c4412d0c664259d29651dba4276d6451ac03b1e..d9a9a4355da5d063160a6eedfc05869d4fbc9e2b 100644
--- a/core/modules/node/src/Plugin/Action/AssignOwnerNode.php
+++ b/core/modules/node/src/Plugin/Action/AssignOwnerNode.php
@@ -67,9 +67,9 @@ public function execute($entity = NULL) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'owner_uid' => '',
-    );
+    ];
   }
 
   /**
@@ -81,34 +81,34 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
 
     // Use dropdown for fewer than 200 users; textbox for more than that.
     if (intval($count) < 200) {
-      $options = array();
+      $options = [];
       $result = $this->connection->query("SELECT uid, name FROM {users_field_data} WHERE uid > 0 AND default_langcode = 1 ORDER BY name");
       foreach ($result as $data) {
         $options[$data->uid] = $data->name;
       }
-      $form['owner_uid'] = array(
+      $form['owner_uid'] = [
         '#type' => 'select',
         '#title' => t('Username'),
         '#default_value' => $this->configuration['owner_uid'],
         '#options' => $options,
         '#description' => $description,
-      );
+      ];
     }
     else {
-      $form['owner_uid'] = array(
+      $form['owner_uid'] = [
         '#type' => 'entity_autocomplete',
         '#title' => t('Username'),
         '#target_type' => 'user',
-        '#selection_setttings' => array(
+        '#selection_setttings' => [
           'include_anonymous' => FALSE,
-        ),
+        ],
         '#default_value' => User::load($this->configuration['owner_uid']),
         // Validation is done in static::validateConfigurationForm().
         '#validate_reference' => FALSE,
         '#size' => '6',
         '#maxlength' => '60',
         '#description' => $description,
-      );
+      ];
     }
     return $form;
   }
@@ -117,7 +117,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
    * {@inheritdoc}
    */
   public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
-    $exists = (bool) $this->connection->queryRange('SELECT 1 FROM {users_field_data} WHERE uid = :uid AND default_langcode = 1', 0, 1, array(':uid' => $form_state->getValue('owner_uid')))->fetchField();
+    $exists = (bool) $this->connection->queryRange('SELECT 1 FROM {users_field_data} WHERE uid = :uid AND default_langcode = 1', 0, 1, [':uid' => $form_state->getValue('owner_uid')])->fetchField();
     if (!$exists) {
       $form_state->setErrorByName('owner_uid', t('Enter a valid username.'));
     }
diff --git a/core/modules/node/src/Plugin/Action/DeleteNode.php b/core/modules/node/src/Plugin/Action/DeleteNode.php
index 83124f116875d57370498ef28bb04404b022bb55..5bf5d9ec38eacccf387911efa1fa9ebad35c6569 100644
--- a/core/modules/node/src/Plugin/Action/DeleteNode.php
+++ b/core/modules/node/src/Plugin/Action/DeleteNode.php
@@ -85,7 +85,7 @@ public function executeMultiple(array $entities) {
    * {@inheritdoc}
    */
   public function execute($object = NULL) {
-    $this->executeMultiple(array($object));
+    $this->executeMultiple([$object]);
   }
 
   /**
diff --git a/core/modules/node/src/Plugin/Action/UnpublishByKeywordNode.php b/core/modules/node/src/Plugin/Action/UnpublishByKeywordNode.php
index 6ec835eb4c3487773da2fd4beb9fe766e201d974..c0081882ce788545b85d42728e5420c787f670f3 100644
--- a/core/modules/node/src/Plugin/Action/UnpublishByKeywordNode.php
+++ b/core/modules/node/src/Plugin/Action/UnpublishByKeywordNode.php
@@ -36,21 +36,21 @@ public function execute($node = NULL) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
-      'keywords' => array(),
-    );
+    return [
+      'keywords' => [],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['keywords'] = array(
+    $form['keywords'] = [
       '#title' => t('Keywords'),
       '#type' => 'textarea',
       '#description' => t('The content will be unpublished if it contains any of the phrases above. Use a case-sensitive, comma-separated list of phrases. Example: funny, bungee jumping, "Company, Inc."'),
       '#default_value' => Tags::implode($this->configuration['keywords']),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/node/src/Plugin/Block/SyndicateBlock.php b/core/modules/node/src/Plugin/Block/SyndicateBlock.php
index 07b969b5078eabc0862a5abc6885b626235d7b2c..bcc98d04baf758c32b33da39ec0db0f2648d6af0 100644
--- a/core/modules/node/src/Plugin/Block/SyndicateBlock.php
+++ b/core/modules/node/src/Plugin/Block/SyndicateBlock.php
@@ -21,9 +21,9 @@ class SyndicateBlock extends BlockBase {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'block_count' => 10,
-    );
+    ];
   }
 
   /**
@@ -37,10 +37,10 @@ protected function blockAccess(AccountInterface $account) {
    * {@inheritdoc}
    */
   public function build() {
-    return array(
+    return [
       '#theme' => 'feed_icon',
       '#url' => 'rss.xml',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/node/src/Plugin/Condition/NodeType.php b/core/modules/node/src/Plugin/Condition/NodeType.php
index ace42e6208eee77e57c9cbf8624afefbfda12de5..dcd2dc7d30689ae4150fa767d1f8652907a60545 100644
--- a/core/modules/node/src/Plugin/Condition/NodeType.php
+++ b/core/modules/node/src/Plugin/Condition/NodeType.php
@@ -64,17 +64,17 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $options = array();
+    $options = [];
     $node_types = $this->entityStorage->loadMultiple();
     foreach ($node_types as $type) {
       $options[$type->id()] = $type->label();
     }
-    $form['bundles'] = array(
+    $form['bundles'] = [
       '#title' => $this->t('Node types'),
       '#type' => 'checkboxes',
       '#options' => $options,
       '#default_value' => $this->configuration['bundles'],
-    );
+    ];
     return parent::buildConfigurationForm($form, $form_state);
   }
 
@@ -94,10 +94,10 @@ public function summary() {
       $bundles = $this->configuration['bundles'];
       $last = array_pop($bundles);
       $bundles = implode(', ', $bundles);
-      return $this->t('The node bundle is @bundles or @last', array('@bundles' => $bundles, '@last' => $last));
+      return $this->t('The node bundle is @bundles or @last', ['@bundles' => $bundles, '@last' => $last]);
     }
     $bundle = reset($this->configuration['bundles']);
-    return $this->t('The node bundle is @bundle', array('@bundle' => $bundle));
+    return $this->t('The node bundle is @bundle', ['@bundle' => $bundle]);
   }
 
   /**
@@ -115,7 +115,7 @@ public function evaluate() {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array('bundles' => array()) + parent::defaultConfiguration();
+    return ['bundles' => []] + parent::defaultConfiguration();
   }
 
 }
diff --git a/core/modules/node/src/Plugin/Search/NodeSearch.php b/core/modules/node/src/Plugin/Search/NodeSearch.php
index ef61064e02693369a46cb32333e556a23a9c1283..6d7c8eb7d47e56d1a6f7079225fcfc7ce37738ef 100644
--- a/core/modules/node/src/Plugin/Search/NodeSearch.php
+++ b/core/modules/node/src/Plugin/Search/NodeSearch.php
@@ -102,12 +102,12 @@ class NodeSearch extends ConfigurableSearchPluginBase implements AccessibleInter
    *
    * @var array
    */
-  protected $advanced = array(
-    'type' => array('column' => 'n.type'),
-    'language' => array('column' => 'i.langcode'),
-    'author' => array('column' => 'n.uid'),
-    'term' => array('column' => 'ti.tid', 'join' => array('table' => 'taxonomy_index', 'alias' => 'ti', 'condition' => 'n.nid = ti.nid')),
-  );
+  protected $advanced = [
+    'type' => ['column' => 'n.type'],
+    'language' => ['column' => 'i.langcode'],
+    'author' => ['column' => 'n.uid'],
+    'term' => ['column' => 'ti.tid', 'join' => ['table' => 'taxonomy_index', 'alias' => 'ti', 'condition' => 'n.nid = ti.nid']],
+  ];
 
   /**
    * A constant for setting and checking the query string.
@@ -207,7 +207,7 @@ public function execute() {
       }
     }
 
-    return array();
+    return [];
   }
 
   /**
@@ -225,7 +225,7 @@ protected function findResults() {
 
     // Build matching conditions.
     $query = $this->database
-      ->select('search_index', 'i', array('target' => 'replica'))
+      ->select('search_index', 'i', ['target' => 'replica'])
       ->extend('Drupal\search\SearchQuery')
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender');
     $query->join('node_field_data', 'n', 'n.nid = i.sid AND n.langcode = i.langcode');
@@ -242,7 +242,7 @@ protected function findResults() {
     // the keywords string, and some of which are separate conditions.
     $parameters = $this->getParameters();
     if (!empty($parameters['f']) && is_array($parameters['f'])) {
-      $filters = array();
+      $filters = [];
       // Match any query value that is an expected option and a value
       // separated by ':' like 'term:27'.
       $pattern = '/^(' . implode('|', array_keys($this->advanced)) . '):([^ ]*)/i';
@@ -277,7 +277,7 @@ protected function findResults() {
     $find = $query
       // Add the language code of the indexed item to the result of the query,
       // since the node will be rendered using the respective language.
-      ->fields('i', array('langcode'))
+      ->fields('i', ['langcode'])
       // And since SearchQuery makes these into GROUP BY queries, if we add
       // a field, for PostgreSQL we also need to make it an aggregate or a
       // GROUP BY. In this case, we want GROUP BY.
@@ -289,7 +289,7 @@ protected function findResults() {
     $status = $query->getStatus();
 
     if ($status & SearchQuery::EXPRESSIONS_IGNORED) {
-      drupal_set_message($this->t('Your search used too many AND/OR expressions. Only the first @count terms were included in this search.', array('@count' => $this->searchSettings->get('and_or_limit'))), 'warning');
+      drupal_set_message($this->t('Your search used too many AND/OR expressions. Only the first @count terms were included in this search.', ['@count' => $this->searchSettings->get('and_or_limit')]), 'warning');
     }
 
     if ($status & SearchQuery::LOWER_CASE_OR) {
@@ -313,7 +313,7 @@ protected function findResults() {
    *   Array of search result item render arrays (empty array if no results).
    */
   protected function prepareResults(StatementInterface $found) {
-    $results = array();
+    $results = [];
 
     $node_storage = $this->entityManager->getStorage('node');
     $node_render = $this->entityManager->getViewBuilder('node');
@@ -329,7 +329,7 @@ protected function prepareResults(StatementInterface $found) {
       $type = $this->entityManager->getStorage('node_type')->load($node->bundle());
 
       unset($build['#theme']);
-      $build['#pre_render'][] = array($this, 'removeSubmittedInfo');
+      $build['#pre_render'][] = [$this, 'removeSubmittedInfo'];
 
       // Fetch comments for snippet.
       $rendered = $this->renderer->renderPlain($build);
@@ -339,13 +339,13 @@ protected function prepareResults(StatementInterface $found) {
       $extra = $this->moduleHandler->invokeAll('node_search_result', [$node]);
 
       $language = $this->languageManager->getLanguage($item->langcode);
-      $username = array(
+      $username = [
         '#theme' => 'username',
         '#account' => $node->getOwner(),
-      );
+      ];
 
-      $result = array(
-        'link' => $node->url('canonical', array('absolute' => TRUE, 'language' => $language)),
+      $result = [
+        'link' => $node->url('canonical', ['absolute' => TRUE, 'language' => $language]),
         'type' => $type->label(),
         'title' => $node->label(),
         'node' => $node,
@@ -353,7 +353,7 @@ protected function prepareResults(StatementInterface $found) {
         'score' => $item->calculated_score,
         'snippet' => search_excerpt($keys, $rendered, $item->langcode),
         'langcode' => $node->language()->getId(),
-      );
+      ];
 
       $this->addCacheableDependency($node);
 
@@ -364,10 +364,10 @@ protected function prepareResults(StatementInterface $found) {
       $this->addCacheableDependency($node->getOwner());
 
       if ($type->displaySubmitted()) {
-        $result += array(
+        $result += [
           'user' => $this->renderer->renderPlain($username),
           'date' => $node->getChangedTime(),
-        );
+        ];
       }
 
       $results[] = $result;
@@ -411,7 +411,7 @@ protected function addNodeRankings(SelectExtender $query) {
           if (isset($values['join']) && !isset($tables[$values['join']['alias']])) {
             $query->addJoin($values['join']['type'], $values['join']['table'], $values['join']['alias'], $values['join']['on']);
           }
-          $arguments = isset($values['arguments']) ? $values['arguments'] : array();
+          $arguments = isset($values['arguments']) ? $values['arguments'] : [];
           $query->addScore($values['score'], $arguments, $node_rank);
         }
       }
@@ -426,9 +426,9 @@ public function updateIndex() {
     // per cron run.
     $limit = (int) $this->searchSettings->get('index.cron_limit');
 
-    $query = db_select('node', 'n', array('target' => 'replica'));
+    $query = db_select('node', 'n', ['target' => 'replica']);
     $query->addField('n', 'nid');
-    $query->leftJoin('search_dataset', 'sd', 'sd.sid = n.nid AND sd.type = :type', array(':type' => $this->getPluginId()));
+    $query->leftJoin('search_dataset', 'sd', 'sd.sid = n.nid AND sd.type = :type', [':type' => $this->getPluginId()]);
     $query->addExpression('CASE MAX(sd.reindex) WHEN NULL THEN 0 ELSE 1 END', 'ex');
     $query->addExpression('MAX(sd.reindex)', 'ex2');
     $query->condition(
@@ -513,9 +513,9 @@ public function markForReindex() {
    */
   public function indexStatus() {
     $total = $this->database->query('SELECT COUNT(*) FROM {node}')->fetchField();
-    $remaining = $this->database->query("SELECT COUNT(DISTINCT n.nid) FROM {node} n LEFT JOIN {search_dataset} sd ON sd.sid = n.nid AND sd.type = :type WHERE sd.sid IS NULL OR sd.reindex <> 0", array(':type' => $this->getPluginId()))->fetchField();
+    $remaining = $this->database->query("SELECT COUNT(DISTINCT n.nid) FROM {node} n LEFT JOIN {search_dataset} sd ON sd.sid = n.nid AND sd.type = :type WHERE sd.sid IS NULL OR sd.reindex <> 0", [':type' => $this->getPluginId()])->fetchField();
 
-    return array('remaining' => $remaining, 'total' => $total);
+    return ['remaining' => $remaining, 'total' => $total];
   }
 
   /**
@@ -526,100 +526,100 @@ public function searchFormAlter(array &$form, FormStateInterface $form_state) {
     $keys = $this->getKeywords();
     $used_advanced = !empty($parameters[self::ADVANCED_FORM]);
     if ($used_advanced) {
-      $f = isset($parameters['f']) ? (array) $parameters['f'] : array();
+      $f = isset($parameters['f']) ? (array) $parameters['f'] : [];
       $defaults = $this->parseAdvancedDefaults($f, $keys);
     }
     else {
-      $defaults = array('keys' => $keys);
+      $defaults = ['keys' => $keys];
     }
 
     $form['basic']['keys']['#default_value'] = $defaults['keys'];
 
     // Add advanced search keyword-related boxes.
-    $form['advanced'] = array(
+    $form['advanced'] = [
       '#type' => 'details',
       '#title' => t('Advanced search'),
-      '#attributes' => array('class' => array('search-advanced')),
+      '#attributes' => ['class' => ['search-advanced']],
       '#access' => $this->account && $this->account->hasPermission('use advanced search'),
       '#open' => $used_advanced,
-    );
-    $form['advanced']['keywords-fieldset'] = array(
+    ];
+    $form['advanced']['keywords-fieldset'] = [
       '#type' => 'fieldset',
       '#title' => t('Keywords'),
-    );
+    ];
 
-    $form['advanced']['keywords'] = array(
+    $form['advanced']['keywords'] = [
       '#prefix' => '<div class="criterion">',
       '#suffix' => '</div>',
-    );
+    ];
 
-    $form['advanced']['keywords-fieldset']['keywords']['or'] = array(
+    $form['advanced']['keywords-fieldset']['keywords']['or'] = [
       '#type' => 'textfield',
       '#title' => t('Containing any of the words'),
       '#size' => 30,
       '#maxlength' => 255,
       '#default_value' => isset($defaults['or']) ? $defaults['or'] : '',
-    );
+    ];
 
-    $form['advanced']['keywords-fieldset']['keywords']['phrase'] = array(
+    $form['advanced']['keywords-fieldset']['keywords']['phrase'] = [
       '#type' => 'textfield',
       '#title' => t('Containing the phrase'),
       '#size' => 30,
       '#maxlength' => 255,
       '#default_value' => isset($defaults['phrase']) ? $defaults['phrase'] : '',
-    );
+    ];
 
-    $form['advanced']['keywords-fieldset']['keywords']['negative'] = array(
+    $form['advanced']['keywords-fieldset']['keywords']['negative'] = [
       '#type' => 'textfield',
       '#title' => t('Containing none of the words'),
       '#size' => 30,
       '#maxlength' => 255,
       '#default_value' => isset($defaults['negative']) ? $defaults['negative'] : '',
-    );
+    ];
 
     // Add node types.
-    $types = array_map(array('\Drupal\Component\Utility\Html', 'escape'), node_type_get_names());
-    $form['advanced']['types-fieldset'] = array(
+    $types = array_map(['\Drupal\Component\Utility\Html', 'escape'], node_type_get_names());
+    $form['advanced']['types-fieldset'] = [
       '#type' => 'fieldset',
       '#title' => t('Types'),
-    );
-    $form['advanced']['types-fieldset']['type'] = array(
+    ];
+    $form['advanced']['types-fieldset']['type'] = [
       '#type' => 'checkboxes',
       '#title' => t('Only of the type(s)'),
       '#prefix' => '<div class="criterion">',
       '#suffix' => '</div>',
       '#options' => $types,
-      '#default_value' => isset($defaults['type']) ? $defaults['type'] : array(),
-    );
+      '#default_value' => isset($defaults['type']) ? $defaults['type'] : [],
+    ];
 
-    $form['advanced']['submit'] = array(
+    $form['advanced']['submit'] = [
       '#type' => 'submit',
       '#value' => t('Advanced search'),
       '#prefix' => '<div class="action">',
       '#suffix' => '</div>',
       '#weight' => 100,
-    );
+    ];
 
     // Add languages.
-    $language_options = array();
+    $language_options = [];
     $language_list = $this->languageManager->getLanguages(LanguageInterface::STATE_ALL);
     foreach ($language_list as $langcode => $language) {
       // Make locked languages appear special in the list.
-      $language_options[$langcode] = $language->isLocked() ? t('- @name -', array('@name' => $language->getName())) : $language->getName();
+      $language_options[$langcode] = $language->isLocked() ? t('- @name -', ['@name' => $language->getName()]) : $language->getName();
     }
     if (count($language_options) > 1) {
-      $form['advanced']['lang-fieldset'] = array(
+      $form['advanced']['lang-fieldset'] = [
         '#type' => 'fieldset',
         '#title' => t('Languages'),
-      );
-      $form['advanced']['lang-fieldset']['language'] = array(
+      ];
+      $form['advanced']['lang-fieldset']['language'] = [
         '#type' => 'checkboxes',
         '#title' => t('Languages'),
         '#prefix' => '<div class="criterion">',
         '#suffix' => '</div>',
         '#options' => $language_options,
-        '#default_value' => isset($defaults['language']) ? $defaults['language'] : array(),
-      );
+        '#default_value' => isset($defaults['language']) ? $defaults['language'] : [],
+      ];
     }
   }
 
@@ -633,7 +633,7 @@ public function buildSearchUrlQuery(FormStateInterface $form_state) {
     $advanced = FALSE;
 
     // Collect extra filters.
-    $filters = array();
+    $filters = [];
     if ($form_state->hasValue('type') && is_array($form_state->getValue('type'))) {
       // Retrieve selected types - Form API sets the value of unselected
       // checkboxes to 0.
@@ -680,7 +680,7 @@ public function buildSearchUrlQuery(FormStateInterface $form_state) {
     // Put the keywords and advanced parameters into GET parameters. Make sure
     // to put keywords into the query even if it is empty, because the page
     // controller uses that to decide it's time to check for search results.
-    $query = array('keys' => $keys);
+    $query = ['keys' => $keys];
     if ($filters) {
       $query['f'] = $filters;
     }
@@ -707,13 +707,13 @@ public function buildSearchUrlQuery(FormStateInterface $form_state) {
    *   a modified 'keys' element for the bare search keywords.
    */
   protected function parseAdvancedDefaults($f, $keys) {
-    $defaults = array();
+    $defaults = [];
 
     // Split out the advanced search parameters.
     foreach ($f as $advanced) {
       list($key, $value) = explode(':', $advanced, 2);
       if (!isset($defaults[$key])) {
-        $defaults[$key] = array();
+        $defaults[$key] = [];
       }
       $defaults[$key][] = $value;
     }
@@ -721,7 +721,7 @@ protected function parseAdvancedDefaults($f, $keys) {
     // Split out the negative, phrase, and OR parts of keywords.
 
     // For phrases, the form only supports one phrase.
-    $matches = array();
+    $matches = [];
     $keys = ' ' . $keys . ' ';
     if (preg_match('/ "([^"]+)" /', $keys, $matches)) {
       $keys = str_replace($matches[0], ' ', $keys);
@@ -764,9 +764,9 @@ protected function getRankings() {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    $configuration = array(
-      'rankings' => array(),
-    );
+    $configuration = [
+      'rankings' => [],
+    ];
     return $configuration;
   }
 
@@ -775,34 +775,34 @@ public function defaultConfiguration() {
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     // Output form for defining rank factor weights.
-    $form['content_ranking'] = array(
+    $form['content_ranking'] = [
       '#type' => 'details',
       '#title' => t('Content ranking'),
       '#open' => TRUE,
-    );
-    $form['content_ranking']['info'] = array(
+    ];
+    $form['content_ranking']['info'] = [
       '#markup' => '<p><em>' . $this->t('Influence is a numeric multiplier used in ordering search results. A higher number means the corresponding factor has more influence on search results; zero means the factor is ignored. Changing these numbers does not require the search index to be rebuilt. Changes take effect immediately.') . '</em></p>'
-    );
+    ];
     // Prepare table.
     $header = [$this->t('Factor'), $this->t('Influence')];
-    $form['content_ranking']['rankings'] = array(
+    $form['content_ranking']['rankings'] = [
       '#type' => 'table',
       '#header' => $header,
-    );
+    ];
 
     // Note: reversed to reflect that higher number = higher ranking.
     $range = range(0, 10);
     $options = array_combine($range, $range);
     foreach ($this->getRankings() as $var => $values) {
-      $form['content_ranking']['rankings'][$var]['name'] = array(
+      $form['content_ranking']['rankings'][$var]['name'] = [
         '#markup' => $values['title'],
-      );
-      $form['content_ranking']['rankings'][$var]['value'] = array(
+      ];
+      $form['content_ranking']['rankings'][$var]['value'] = [
         '#type' => 'select',
         '#options' => $options,
         '#attributes' => ['aria-label' => $this->t("Influence of '@title'", ['@title' => $values['title']])],
         '#default_value' => isset($this->configuration['rankings'][$var]) ? $this->configuration['rankings'][$var] : 0,
-      );
+      ];
     }
     return $form;
   }
diff --git a/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php b/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
index 9b2c3cd73997e695cf6fb5450c817155cdbfdec6..6d9b67af1f9da1fcc0d5081a3df902959cc175c6 100644
--- a/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
+++ b/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
@@ -101,7 +101,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
     }
 
     // Read all CCK field instance definitions in the source database.
-    $fields = array();
+    $fields = [];
     try {
       $source_plugin = static::getSourcePlugin('d6_field_instance');
       $source_plugin->checkRequirements();
diff --git a/core/modules/node/src/Plugin/migrate/destination/EntityNodeType.php b/core/modules/node/src/Plugin/migrate/destination/EntityNodeType.php
index 820364c6a6e2531caf767b17af582e1c247d3bfb..c26f3b9f1c31192bf7ec9f69367200ce0f3744b1 100644
--- a/core/modules/node/src/Plugin/migrate/destination/EntityNodeType.php
+++ b/core/modules/node/src/Plugin/migrate/destination/EntityNodeType.php
@@ -15,7 +15,7 @@ class EntityNodeType extends EntityConfigBase {
   /**
      * {@inheritdoc}
      */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     $entity_ids = parent::import($row, $old_destination_id_values);
     if ($row->getDestinationProperty('create_body')) {
       $node_type = $this->storage->load(reset($entity_ids));
diff --git a/core/modules/node/src/Plugin/migrate/process/d6/NodeUpdate7008.php b/core/modules/node/src/Plugin/migrate/process/d6/NodeUpdate7008.php
index cf0b4adef8aa2bd4201ee7af34b3cc2c2611b1ce..f6da2eb5dccd1a11df3a5ce8839ac609968ec9a4 100644
--- a/core/modules/node/src/Plugin/migrate/process/d6/NodeUpdate7008.php
+++ b/core/modules/node/src/Plugin/migrate/process/d6/NodeUpdate7008.php
@@ -22,7 +22,7 @@ class NodeUpdate7008 extends ProcessPluginBase {
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     if ($value === 'administer nodes') {
-      return array($value, 'access content overview');
+      return [$value, 'access content overview'];
     }
     return $value;
   }
diff --git a/core/modules/node/src/Plugin/migrate/source/d6/Node.php b/core/modules/node/src/Plugin/migrate/source/d6/Node.php
index 2e4d1a6057363700ceb059f29e06becc92cb1650..ffa26595f1c1960fa95dbd20a11e12221b644353 100644
--- a/core/modules/node/src/Plugin/migrate/source/d6/Node.php
+++ b/core/modules/node/src/Plugin/migrate/source/d6/Node.php
@@ -77,7 +77,7 @@ public function query() {
     $query->innerJoin('node', 'n', static::JOIN);
     $this->handleTranslations($query);
 
-    $query->fields('n', array(
+    $query->fields('n', [
         'nid',
         'type',
         'language',
@@ -90,8 +90,8 @@ public function query() {
         'sticky',
         'tnid',
         'translate',
-      ))
-      ->fields('nr', array(
+      ])
+      ->fields('nr', [
         'title',
         'body',
         'teaser',
@@ -99,7 +99,7 @@ public function query() {
         'timestamp',
         'format',
         'vid',
-      ));
+      ]);
     $query->addField('n', 'uid', 'node_uid');
     $query->addField('nr', 'uid', 'revision_uid');
 
@@ -129,7 +129,7 @@ protected function initializeIterator() {
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'nid' => $this->t('Node ID'),
       'type' => $this->t('Type'),
       'title' => $this->t('Title'),
@@ -147,7 +147,7 @@ public function fields() {
       'language' => $this->t('Language (fr, en, ...)'),
       'tnid' => $this->t('The translation set id for this node'),
       'timestamp' => $this->t('The timestamp the latest revision of this node was created.'),
-    );
+    ];
     return $fields;
   }
 
diff --git a/core/modules/node/src/Plugin/migrate/source/d6/NodeRevision.php b/core/modules/node/src/Plugin/migrate/source/d6/NodeRevision.php
index 3f9a5808fc9b5a7e9f295acb9c09c6fce51b632a..f3296c234d52f7688bd001216f661ea003336a06 100644
--- a/core/modules/node/src/Plugin/migrate/source/d6/NodeRevision.php
+++ b/core/modules/node/src/Plugin/migrate/source/d6/NodeRevision.php
@@ -22,11 +22,11 @@ class NodeRevision extends Node {
    */
   public function fields() {
     // Use all the node fields plus the vid that identifies the version.
-    return parent::fields() + array(
+    return parent::fields() + [
       'vid' => t('The primary identifier for this version.'),
       'log' => $this->t('Revision Log message'),
       'timestamp' => $this->t('Revision timestamp'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/node/src/Plugin/migrate/source/d6/NodeType.php b/core/modules/node/src/Plugin/migrate/source/d6/NodeType.php
index 0653d59c57cd1e3a5a7559e4ee813d10f45401fb..6a6a32b3e55bd3d06955e7ce68f56ab5940b116e 100644
--- a/core/modules/node/src/Plugin/migrate/source/d6/NodeType.php
+++ b/core/modules/node/src/Plugin/migrate/source/d6/NodeType.php
@@ -40,7 +40,7 @@ class NodeType extends DrupalSqlBase {
    */
   public function query() {
     return $this->select('node_type', 't')
-      ->fields('t', array(
+      ->fields('t', [
         'type',
         'name',
         'module',
@@ -54,7 +54,7 @@ public function query() {
         'modified',
         'locked',
         'orig_type',
-      ))
+      ])
       ->orderBy('t.type');
   }
 
@@ -62,7 +62,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'type' => $this->t('Machine name of the node type.'),
       'name' => $this->t('Human name of the node type.'),
       'module' => $this->t('The module providing the node type.'),
@@ -77,7 +77,7 @@ public function fields() {
       'locked' => $this->t('Flag.'),
       'orig_type' => $this->t('The original type.'),
       'teaser_length' => $this->t('Teaser length'),
-    );
+    ];
   }
 
   /**
@@ -86,7 +86,7 @@ public function fields() {
   protected function initializeIterator() {
     $this->teaserLength = $this->variableGet('teaser_length', 600);
     $this->nodePreview = $this->variableGet('node_preview', 0);
-    $this->themeSettings = $this->variableGet('theme_settings', array());
+    $this->themeSettings = $this->variableGet('theme_settings', []);
     return parent::initializeIterator();
   }
 
@@ -98,9 +98,9 @@ public function prepareRow(Row $row) {
     $row->setSourceProperty('node_preview', $this->nodePreview);
 
     $type = $row->getSourceProperty('type');
-    $source_options = $this->variableGet('node_options_' . $type, array('promote', 'sticky'));
-    $options = array();
-    foreach (array('promote', 'sticky', 'status', 'revision') as $item) {
+    $source_options = $this->variableGet('node_options_' . $type, ['promote', 'sticky']);
+    $options = [];
+    foreach (['promote', 'sticky', 'status', 'revision'] as $item) {
       $options[$item] = in_array($item, $source_options);
     }
     $row->setSourceProperty('options', $options);
diff --git a/core/modules/node/src/Plugin/migrate/source/d6/ViewMode.php b/core/modules/node/src/Plugin/migrate/source/d6/ViewMode.php
index a4503984048f464ee9c718fd88e782f8f8676e61..8e7b8ae15e4ba90cf05ad48a425bcbfc751f7f12 100644
--- a/core/modules/node/src/Plugin/migrate/source/d6/ViewMode.php
+++ b/core/modules/node/src/Plugin/migrate/source/d6/ViewMode.php
@@ -16,7 +16,7 @@ class ViewMode extends ViewModeBase {
    * {@inheritdoc}
    */
   protected function initializeIterator() {
-    $rows = array();
+    $rows = [];
     $result = $this->prepareQuery()->execute();
     while ($field_row = $result->fetchAssoc()) {
       $field_row['display_settings'] = unserialize($field_row['display_settings']);
@@ -38,9 +38,9 @@ protected function initializeIterator() {
    */
   public function query() {
     $query = $this->select('content_node_field_instance', 'cnfi')
-      ->fields('cnfi', array(
+      ->fields('cnfi', [
         'display_settings',
-      ));
+      ]);
 
     return $query;
   }
@@ -49,9 +49,9 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'display_settings' => $this->t('Serialize data with display settings.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/node/src/Plugin/migrate/source/d6/ViewModeBase.php b/core/modules/node/src/Plugin/migrate/source/d6/ViewModeBase.php
index 54abcb0f42b81635c9725eeb5103a29a5bfe2ba5..315f069a6196d637951369e7e4130b80e3cfcaac 100644
--- a/core/modules/node/src/Plugin/migrate/source/d6/ViewModeBase.php
+++ b/core/modules/node/src/Plugin/migrate/source/d6/ViewModeBase.php
@@ -33,7 +33,7 @@ public function count() {
    *   The view mode names.
    */
   public function getViewModes() {
-    return array(
+    return [
       0,
       1,
       2,
@@ -42,7 +42,7 @@ public function getViewModes() {
       5,
       'teaser',
       'full',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/node/src/Plugin/migrate/source/d7/Node.php b/core/modules/node/src/Plugin/migrate/source/d7/Node.php
index 0de4c9685235f61fb9cf1b6f06c23c2e493ab510..451905cd96ac68a3b3425b3881e5788ef3ef6f65 100644
--- a/core/modules/node/src/Plugin/migrate/source/d7/Node.php
+++ b/core/modules/node/src/Plugin/migrate/source/d7/Node.php
@@ -62,7 +62,7 @@ public static function create(ContainerInterface $container, array $configuratio
   public function query() {
     // Select node in its last revision.
     $query = $this->select('node_revision', 'nr')
-      ->fields('n', array(
+      ->fields('n', [
         'nid',
         'type',
         'language',
@@ -74,13 +74,13 @@ public function query() {
         'sticky',
         'tnid',
         'translate',
-      ))
-      ->fields('nr', array(
+      ])
+      ->fields('nr', [
         'vid',
         'title',
         'log',
         'timestamp',
-      ));
+      ]);
     $query->addField('n', 'uid', 'node_uid');
     $query->addField('nr', 'uid', 'revision_uid');
     $query->innerJoin('node', 'n', static::JOIN);
@@ -122,7 +122,7 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'nid' => $this->t('Node ID'),
       'type' => $this->t('Type'),
       'title' => $this->t('Title'),
@@ -137,7 +137,7 @@ public function fields() {
       'language' => $this->t('Language (fr, en, ...)'),
       'tnid' => $this->t('The translation set id for this node'),
       'timestamp' => $this->t('The timestamp the latest revision of this node was created.'),
-    );
+    ];
     return $fields;
   }
 
diff --git a/core/modules/node/src/Plugin/migrate/source/d7/NodeRevision.php b/core/modules/node/src/Plugin/migrate/source/d7/NodeRevision.php
index b88359abe77bbf36922bec2d7e5a732b54fab60f..89c1bcca5e7f9424c85a17344ca5864272a1bffe 100644
--- a/core/modules/node/src/Plugin/migrate/source/d7/NodeRevision.php
+++ b/core/modules/node/src/Plugin/migrate/source/d7/NodeRevision.php
@@ -22,11 +22,11 @@ class NodeRevision extends Node {
    */
   public function fields() {
     // Use all the node fields plus the vid that identifies the version.
-    return parent::fields() + array(
+    return parent::fields() + [
       'vid' => t('The primary identifier for this version.'),
       'log' => $this->t('Revision Log message'),
       'timestamp' => $this->t('Revision timestamp'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/node/src/Plugin/migrate/source/d7/NodeType.php b/core/modules/node/src/Plugin/migrate/source/d7/NodeType.php
index b8a8519accc73d819e394b58543a770113f33b40..85c0d325815b660031618fdc9ab7d89ec67d2f49 100644
--- a/core/modules/node/src/Plugin/migrate/source/d7/NodeType.php
+++ b/core/modules/node/src/Plugin/migrate/source/d7/NodeType.php
@@ -40,7 +40,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'type' => $this->t('Machine name of the node type.'),
       'name' => $this->t('Human name of the node type.'),
       'description' => $this->t('Description of the node type.'),
@@ -53,7 +53,7 @@ public function fields() {
       'locked' => $this->t('Flag.'),
       'orig_type' => $this->t('The original type.'),
       'teaser_length' => $this->t('Teaser length'),
-    );
+    ];
   }
 
   /**
@@ -73,9 +73,9 @@ public function prepareRow(Row $row) {
     $row->setSourceProperty('node_preview', $this->nodePreview);
 
     $type = $row->getSourceProperty('type');
-    $source_options = $this->variableGet('node_options_' . $type, array('promote', 'sticky'));
-    $options = array();
-    foreach (array('promote', 'sticky', 'status', 'revision') as $item) {
+    $source_options = $this->variableGet('node_options_' . $type, ['promote', 'sticky']);
+    $options = [];
+    foreach (['promote', 'sticky', 'status', 'revision'] as $item) {
       $options[$item] = in_array($item, $source_options);
     }
     $row->setSourceProperty('options', $options);
@@ -86,7 +86,7 @@ public function prepareRow(Row $row) {
     if ($this->moduleExists('field')) {
       // Find body field for this node type.
       $body = $this->select('field_config_instance', 'fci')
-        ->fields('fci', array('data'))
+        ->fields('fci', ['data'])
         ->condition('entity_type', 'node')
         ->condition('bundle', $row->getSourceProperty('type'))
         ->condition('field_name', 'body')
diff --git a/core/modules/node/src/Plugin/views/area/ListingEmpty.php b/core/modules/node/src/Plugin/views/area/ListingEmpty.php
index e52ca1bf67d7ddb44a2924c431bcf005a21e3736..08e1d272232e247f0db2b89c9d35fe3f445c8345 100644
--- a/core/modules/node/src/Plugin/views/area/ListingEmpty.php
+++ b/core/modules/node/src/Plugin/views/area/ListingEmpty.php
@@ -59,19 +59,19 @@ public static function create(ContainerInterface $container, array $configuratio
   public function render($empty = FALSE) {
     $account = \Drupal::currentUser();
     if (!$empty || !empty($this->options['empty'])) {
-      $element = array(
+      $element = [
         '#theme' => 'links',
-        '#links' => array(
-          array(
+        '#links' => [
+          [
             'url' => Url::fromRoute('node.add_page'),
             'title' => $this->t('Add content'),
-          ),
-        ),
-        '#access' => $this->accessManager->checkNamedRoute('node.add_page', array(), $account),
-      );
+          ],
+        ],
+        '#access' => $this->accessManager->checkNamedRoute('node.add_page', [], $account),
+      ];
       return $element;
     }
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/node/src/Plugin/views/argument/Nid.php b/core/modules/node/src/Plugin/views/argument/Nid.php
index 8f846bc6a13ea82a56ccbbdaed4e72f20e8fed1b..3b0f8df95985599c19ef1781c6c94a9d2e18b036 100644
--- a/core/modules/node/src/Plugin/views/argument/Nid.php
+++ b/core/modules/node/src/Plugin/views/argument/Nid.php
@@ -52,7 +52,7 @@ public static function create(ContainerInterface $container, array $configuratio
    * Override the behavior of title(). Get the title of the node.
    */
   public function titleQuery() {
-    $titles = array();
+    $titles = [];
 
     $nodes = $this->nodeStorage->loadMultiple($this->value);
     foreach ($nodes as $node) {
diff --git a/core/modules/node/src/Plugin/views/argument/UidRevision.php b/core/modules/node/src/Plugin/views/argument/UidRevision.php
index 9a19fe36f3e99e0e4d62e848fcdabfc9d326a323..9e2fb810c2cdc5a9d827716dadc639e488e34365 100644
--- a/core/modules/node/src/Plugin/views/argument/UidRevision.php
+++ b/core/modules/node/src/Plugin/views/argument/UidRevision.php
@@ -15,7 +15,7 @@ class UidRevision extends Uid {
   public function query($group_by = FALSE) {
     $this->ensureMyTable();
     $placeholder = $this->placeholder();
-    $this->query->addWhereExpression(0, "$this->tableAlias.revision_uid = $placeholder OR ((SELECT COUNT(DISTINCT vid) FROM {node_revision} nr WHERE nfr.revision_uid = $placeholder AND nr.nid = $this->tableAlias.nid) > 0)", array($placeholder => $this->argument));
+    $this->query->addWhereExpression(0, "$this->tableAlias.revision_uid = $placeholder OR ((SELECT COUNT(DISTINCT vid) FROM {node_revision} nr WHERE nfr.revision_uid = $placeholder AND nr.nid = $this->tableAlias.nid) > 0)", [$placeholder => $this->argument]);
   }
 
 }
diff --git a/core/modules/node/src/Plugin/views/argument/Vid.php b/core/modules/node/src/Plugin/views/argument/Vid.php
index 8788b67a30e2a32dbbe78ef30881a1eca44b3d07..1cad35c71b7186cc160a8c133ae764d58068097b 100644
--- a/core/modules/node/src/Plugin/views/argument/Vid.php
+++ b/core/modules/node/src/Plugin/views/argument/Vid.php
@@ -66,10 +66,10 @@ public static function create(ContainerInterface $container, array $configuratio
    * Override the behavior of title(). Get the title of the revision.
    */
   public function titleQuery() {
-    $titles = array();
+    $titles = [];
 
-    $results = $this->database->query('SELECT nr.vid, nr.nid, npr.title FROM {node_revision} nr WHERE nr.vid IN ( :vids[] )', array(':vids[]' => $this->value))->fetchAllAssoc('vid', PDO::FETCH_ASSOC);
-    $nids = array();
+    $results = $this->database->query('SELECT nr.vid, nr.nid, npr.title FROM {node_revision} nr WHERE nr.vid IN ( :vids[] )', [':vids[]' => $this->value])->fetchAllAssoc('vid', PDO::FETCH_ASSOC);
+    $nids = [];
     foreach ($results as $result) {
       $nids[] = $result['nid'];
     }
diff --git a/core/modules/node/src/Plugin/views/field/Node.php b/core/modules/node/src/Plugin/views/field/Node.php
index d721414f1e18f0a9b65808b92ae779699deffffd..e5cd9d70252dd989018582dc8de06ccd9d25a825 100644
--- a/core/modules/node/src/Plugin/views/field/Node.php
+++ b/core/modules/node/src/Plugin/views/field/Node.php
@@ -28,7 +28,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
     // Don't add the additional fields to groupby
     if (!empty($this->options['link_to_node'])) {
-      $this->additional_fields['nid'] = array('table' => 'node_field_data', 'field' => 'nid');
+      $this->additional_fields['nid'] = ['table' => 'node_field_data', 'field' => 'nid'];
     }
   }
 
@@ -37,7 +37,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['link_to_node'] = array('default' => isset($this->definition['link_to_node default']) ? $this->definition['link_to_node default'] : FALSE);
+    $options['link_to_node'] = ['default' => isset($this->definition['link_to_node default']) ? $this->definition['link_to_node default'] : FALSE];
     return $options;
   }
 
@@ -45,12 +45,12 @@ protected function defineOptions() {
    * Provide link to node option
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['link_to_node'] = array(
+    $form['link_to_node'] = [
       '#title' => $this->t('Link this field to the original piece of content'),
       '#description' => $this->t("Enable to override this field's links."),
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['link_to_node']),
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
diff --git a/core/modules/node/src/Plugin/views/field/Path.php b/core/modules/node/src/Plugin/views/field/Path.php
index 5fb07cd771a497f05ba5eb0ebffc3b75fe53c0ab..c1c74ab658a7f53c62b5bdbef305a1384d80eef5 100644
--- a/core/modules/node/src/Plugin/views/field/Path.php
+++ b/core/modules/node/src/Plugin/views/field/Path.php
@@ -31,7 +31,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['absolute'] = array('default' => FALSE);
+    $options['absolute'] = ['default' => FALSE];
 
     return $options;
   }
@@ -41,13 +41,13 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['absolute'] = array(
+    $form['absolute'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Use absolute link (begins with "http://")'),
       '#default_value' => $this->options['absolute'],
       '#description' => $this->t('Enable this option to output an absolute link. Required if you want to use the path as a link destination (as in "output this field as a link" above).'),
       '#fieldset' => 'alter',
-    );
+    ];
   }
 
   /**
@@ -63,9 +63,9 @@ public function query() {
    */
   public function render(ResultRow $values) {
     $nid = $this->getValue($values, 'nid');
-    return array(
+    return [
       '#markup' => \Drupal::url('entity.node.canonical', ['node' => $nid], ['absolute' => $this->options['absolute']]),
-    );
+    ];
   }
 
 }
diff --git a/core/modules/node/src/Plugin/views/filter/UidRevision.php b/core/modules/node/src/Plugin/views/filter/UidRevision.php
index ce588b7b9cf74cf1b399ccb84d2eaba79917c2e9..0968480f2236fa6a9d372589199f35e5cec8e356 100644
--- a/core/modules/node/src/Plugin/views/filter/UidRevision.php
+++ b/core/modules/node/src/Plugin/views/filter/UidRevision.php
@@ -21,7 +21,7 @@ public function query($group_by = FALSE) {
     $args = array_values($this->value);
 
     $this->query->addWhereExpression($this->options['group'], "$this->tableAlias.uid IN($placeholder) OR
-      ((SELECT COUNT(DISTINCT vid) FROM {node_revision} nr WHERE nr.revision_uid IN ($placeholder) AND nr.nid = $this->tableAlias.nid) > 0)", array($placeholder => $args),
+      ((SELECT COUNT(DISTINCT vid) FROM {node_revision} nr WHERE nr.revision_uid IN ($placeholder) AND nr.nid = $this->tableAlias.nid) > 0)", [$placeholder => $args],
       $args);
   }
 
diff --git a/core/modules/node/src/Plugin/views/row/Rss.php b/core/modules/node/src/Plugin/views/row/Rss.php
index 097655a20418e2708a86d33ffc85648330ad243f..96838796a16b1250167084ebf86209724dd3820f 100644
--- a/core/modules/node/src/Plugin/views/row/Rss.php
+++ b/core/modules/node/src/Plugin/views/row/Rss.php
@@ -27,7 +27,7 @@ class Rss extends RssPluginBase {
   public $base_field = 'nid';
 
   // Stores the nodes loaded with preRender.
-  public $nodes = array();
+  public $nodes = [];
 
   /**
    * {@inheritdoc}
@@ -74,7 +74,7 @@ public function summaryTitle() {
   }
 
   public function preRender($values) {
-    $nids = array();
+    $nids = [];
     foreach ($values as $row) {
       $nids[] = $row->{$this->field_alias};
     }
@@ -103,23 +103,23 @@ public function render($row) {
       return;
     }
 
-    $node->link = $node->url('canonical', array('absolute' => TRUE));
-    $node->rss_namespaces = array();
-    $node->rss_elements = array(
-      array(
+    $node->link = $node->url('canonical', ['absolute' => TRUE]);
+    $node->rss_namespaces = [];
+    $node->rss_elements = [
+      [
         'key' => 'pubDate',
         'value' => gmdate('r', $node->getCreatedTime()),
-      ),
-      array(
+      ],
+      [
         'key' => 'dc:creator',
         'value' => $node->getOwner()->getDisplayName(),
-      ),
-      array(
+      ],
+      [
         'key' => 'guid',
         'value' => $node->id() . ' at ' . $base_url,
-        'attributes' => array('isPermaLink' => 'false'),
-      ),
-    );
+        'attributes' => ['isPermaLink' => 'false'],
+      ],
+    ];
 
     // The node gets built and modules add to or modify $node->rss_elements
     // and $node->rss_namespaces.
@@ -135,7 +135,7 @@ public function render($row) {
     elseif (function_exists('rdf_get_namespaces')) {
       // Merge RDF namespaces in the XML namespaces in case they are used
       // further in the RSS content.
-      $xml_rdf_namespaces = array();
+      $xml_rdf_namespaces = [];
       foreach (rdf_get_namespaces() as $prefix => $uri) {
         $xml_rdf_namespaces['xmlns:' . $prefix] = $uri;
       }
@@ -153,12 +153,12 @@ public function render($row) {
     // template_preprocess_views_view_row_rss() can still access it.
     $item->elements = &$node->rss_elements;
     $item->nid = $node->id();
-    $build = array(
+    $build = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#row' => $item,
-    );
+    ];
 
     return $build;
   }
diff --git a/core/modules/node/src/Plugin/views/wizard/Node.php b/core/modules/node/src/Plugin/views/wizard/Node.php
index ce267e662e9ae60b44efdb3781ad0535703ac774..34d4bcf6c5e7784f1a59f2e76f5c5ddfb295994c 100644
--- a/core/modules/node/src/Plugin/views/wizard/Node.php
+++ b/core/modules/node/src/Plugin/views/wizard/Node.php
@@ -28,16 +28,16 @@ class Node extends WizardPluginBase {
   /**
    * Set default values for the filters.
    */
-  protected $filters = array(
-    'status' => array(
+  protected $filters = [
+    'status' => [
       'value' => TRUE,
       'table' => 'node_field_data',
       'field' => 'status',
       'plugin_id' => 'boolean',
       'entity_type' => 'node',
       'entity_field' => 'status',
-    )
-  );
+    ]
+  ];
 
   /**
    * Overrides Drupal\views\Plugin\views\wizard\WizardPluginBase::getAvailableSorts().
@@ -48,16 +48,16 @@ class Node extends WizardPluginBase {
    */
   public function getAvailableSorts() {
     // You can't execute functions in properties, so override the method
-    return array(
+    return [
       'node_field_data-title:ASC' => $this->t('Title')
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   protected function rowStyleOptions() {
-    $options = array();
+    $options = [];
     $options['teasers'] = $this->t('teasers');
     $options['full_posts'] = $this->t('full posts');
     $options['titles'] = $this->t('titles');
@@ -110,22 +110,22 @@ protected function defaultDisplayOptions() {
   protected function defaultDisplayFiltersUser(array $form, FormStateInterface $form_state) {
     $filters = parent::defaultDisplayFiltersUser($form, $form_state);
 
-    $tids = array();
-    if ($values = $form_state->getValue(array('show', 'tagged_with'))) {
+    $tids = [];
+    if ($values = $form_state->getValue(['show', 'tagged_with'])) {
       foreach ($values as $value) {
         $tids[] = $value['target_id'];
       }
     }
     if (!empty($tids)) {
       $vid = reset($form['displays']['show']['tagged_with']['#selection_settings']['target_bundles']);
-      $filters['tid'] = array(
+      $filters['tid'] = [
         'id' => 'tid',
         'table' => 'taxonomy_index',
         'field' => 'tid',
         'value' => $tids,
         'vid' => $vid,
         'plugin_id' => 'taxonomy_index_tid',
-      );
+      ];
       // If the user entered more than one valid term in the autocomplete
       // field, they probably intended both of them to be applied.
       if (count($tids) > 1) {
@@ -144,8 +144,8 @@ protected function defaultDisplayFiltersUser(array $form, FormStateInterface $fo
    */
   protected function pageDisplayOptions(array $form, FormStateInterface $form_state) {
     $display_options = parent::pageDisplayOptions($form, $form_state);
-    $row_plugin = $form_state->getValue(array('page', 'style', 'row_plugin'));
-    $row_options = $form_state->getValue(array('page', 'style', 'row_options'), array());
+    $row_plugin = $form_state->getValue(['page', 'style', 'row_plugin']);
+    $row_options = $form_state->getValue(['page', 'style', 'row_options'], []);
     $this->display_options_row($display_options, $row_plugin, $row_options);
     return $display_options;
   }
@@ -155,8 +155,8 @@ protected function pageDisplayOptions(array $form, FormStateInterface $form_stat
    */
   protected function blockDisplayOptions(array $form, FormStateInterface $form_state) {
     $display_options = parent::blockDisplayOptions($form, $form_state);
-    $row_plugin = $form_state->getValue(array('block', 'style', 'row_plugin'));
-    $row_options = $form_state->getValue(array('block', 'style', 'row_options'), array());
+    $row_plugin = $form_state->getValue(['block', 'style', 'row_plugin']);
+    $row_options = $form_state->getValue(['block', 'style', 'row_options'], []);
     $this->display_options_row($display_options, $row_plugin, $row_options);
     return $display_options;
   }
@@ -195,7 +195,7 @@ protected function buildFilters(&$form, FormStateInterface $form_state) {
     parent::buildFilters($form, $form_state);
 
     if (isset($form['displays']['show']['type'])) {
-      $selected_bundle = static::getSelected($form_state, array('show', 'type'), 'all', $form['displays']['show']['type']);
+      $selected_bundle = static::getSelected($form_state, ['show', 'type'], 'all', $form['displays']['show']['type']);
     }
 
     // Add the "tagged with" filter to the view.
@@ -221,9 +221,9 @@ protected function buildFilters(&$form, FormStateInterface $form_state) {
     // Double check that this is a real bundle before using it (since above
     // we added a dummy option 'all' to the bundle list on the form).
     if (isset($selected_bundle) && in_array($selected_bundle, $bundles)) {
-      $bundles = array($selected_bundle);
+      $bundles = [$selected_bundle];
     }
-    $tag_fields = array();
+    $tag_fields = [];
     foreach ($bundles as $bundle) {
       $display = entity_get_form_display($this->entityTypeId, $bundle, 'default');
       $taxonomy_fields = array_filter(\Drupal::entityManager()->getFieldDefinitions($this->entityTypeId, $bundle), function ($field_definition) {
@@ -253,7 +253,7 @@ protected function buildFilters(&$form, FormStateInterface $form_state) {
       }
       // Add the autocomplete textfield to the wizard.
       $target_bundles = $tag_fields[$tag_field_name]->getSetting('handler_settings')['target_bundles'];
-      $form['displays']['show']['tagged_with'] = array(
+      $form['displays']['show']['tagged_with'] = [
         '#type' => 'entity_autocomplete',
         '#title' => $this->t('tagged with'),
         '#target_type' => 'taxonomy_term',
@@ -261,7 +261,7 @@ protected function buildFilters(&$form, FormStateInterface $form_state) {
         '#tags' => TRUE,
         '#size' => 30,
         '#maxlength' => 1024,
-      );
+      ];
     }
   }
 
diff --git a/core/modules/node/src/Plugin/views/wizard/NodeRevision.php b/core/modules/node/src/Plugin/views/wizard/NodeRevision.php
index 64bc7beda393f3b8c7c7014f8784ab9b571434e6..9c3465d2ba4cf9d595284ca043fb5c5409c3048c 100644
--- a/core/modules/node/src/Plugin/views/wizard/NodeRevision.php
+++ b/core/modules/node/src/Plugin/views/wizard/NodeRevision.php
@@ -27,16 +27,16 @@ class NodeRevision extends WizardPluginBase {
   /**
    * Set default values for the filters.
    */
-  protected $filters = array(
-    'status' => array(
+  protected $filters = [
+    'status' => [
       'value' => TRUE,
       'table' => 'node_field_revision',
       'field' => 'status',
       'plugin_id' => 'boolean',
       'entity_type' => 'node',
       'entity_field' => 'status',
-    )
-  );
+    ]
+  ];
 
   /**
    * Overrides Drupal\views\Plugin\views\wizard\WizardPluginBase::rowStyleOptions().
diff --git a/core/modules/node/src/Routing/RouteSubscriber.php b/core/modules/node/src/Routing/RouteSubscriber.php
index 23bd0f8f42a88778df7f506d4624f239ccdf777f..66d83c123654a48c2f16aaaee9c149b729a87d6c 100644
--- a/core/modules/node/src/Routing/RouteSubscriber.php
+++ b/core/modules/node/src/Routing/RouteSubscriber.php
@@ -19,13 +19,13 @@ protected function alterRoutes(RouteCollection $collection) {
     // a node listing instead of the path's child links.
     $route = $collection->get('system.admin_content');
     if ($route) {
-      $route->setDefaults(array(
+      $route->setDefaults([
         '_title' => 'Content',
         '_entity_list' => 'node',
-      ));
-      $route->setRequirements(array(
+      ]);
+      $route->setRequirements([
         '_permission' => 'access content overview',
-      ));
+      ]);
     }
   }
 
diff --git a/core/modules/node/src/Tests/NodeAccessBaseTableTest.php b/core/modules/node/src/Tests/NodeAccessBaseTableTest.php
index 74e2340ca1f0d0c83a0e1f3c93f9cb47cd0f5396..ef3ea9092401e6e31cad7b58c429620277aff229 100644
--- a/core/modules/node/src/Tests/NodeAccessBaseTableTest.php
+++ b/core/modules/node/src/Tests/NodeAccessBaseTableTest.php
@@ -16,7 +16,7 @@ class NodeAccessBaseTableTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_access_test', 'views');
+  public static $modules = ['node_access_test', 'views'];
 
   /**
    * The installation profile to use with this test.
@@ -85,23 +85,23 @@ protected function setUp() {
    */
   function testNodeAccessBasic() {
     $num_simple_users = 2;
-    $simple_users = array();
+    $simple_users = [];
 
     // Nodes keyed by uid and nid: $nodes[$uid][$nid] = $is_private;
-    $this->nodesByUser = array();
+    $this->nodesByUser = [];
     // Titles keyed by nid.
     $titles = [];
     // Array of nids marked private.
     $private_nodes = [];
     for ($i = 0; $i < $num_simple_users; $i++) {
-      $simple_users[$i] = $this->drupalCreateUser(array('access content', 'create article content'));
+      $simple_users[$i] = $this->drupalCreateUser(['access content', 'create article content']);
     }
     foreach ($simple_users as $this->webUser) {
       $this->drupalLogin($this->webUser);
-      foreach (array(0 => 'Public', 1 => 'Private') as $is_private => $type) {
-        $edit = array(
-          'title[0][value]' => t('@private_public Article created by @user', array('@private_public' => $type, '@user' => $this->webUser->getUsername())),
-        );
+      foreach ([0 => 'Public', 1 => 'Private'] as $is_private => $type) {
+        $edit = [
+          'title[0][value]' => t('@private_public Article created by @user', ['@private_public' => $type, '@user' => $this->webUser->getUsername()]),
+        ];
         if ($is_private) {
           $edit['private[0][value]'] = TRUE;
           $edit['body[0][value]'] = 'private node';
@@ -122,8 +122,8 @@ function testNodeAccessBasic() {
         $this->nodesByUser[$this->webUser->id()][$node->id()] = $is_private;
       }
     }
-    $this->publicTid = db_query('SELECT tid FROM {taxonomy_term_field_data} WHERE name = :name AND default_langcode = 1', array(':name' => 'public'))->fetchField();
-    $this->privateTid = db_query('SELECT tid FROM {taxonomy_term_field_data} WHERE name = :name AND default_langcode = 1', array(':name' => 'private'))->fetchField();
+    $this->publicTid = db_query('SELECT tid FROM {taxonomy_term_field_data} WHERE name = :name AND default_langcode = 1', [':name' => 'public'])->fetchField();
+    $this->privateTid = db_query('SELECT tid FROM {taxonomy_term_field_data} WHERE name = :name AND default_langcode = 1', [':name' => 'private'])->fetchField();
     $this->assertTrue($this->publicTid, 'Public tid was found');
     $this->assertTrue($this->privateTid, 'Private tid was found');
     foreach ($simple_users as $this->webUser) {
@@ -138,12 +138,12 @@ function testNodeAccessBasic() {
           else {
             $should_be_visible = TRUE;
           }
-          $this->assertResponse($should_be_visible ? 200 : 403, strtr('A %private node by user %uid is %visible for user %current_uid.', array(
+          $this->assertResponse($should_be_visible ? 200 : 403, strtr('A %private node by user %uid is %visible for user %current_uid.', [
             '%private' => $is_private ? 'private' : 'public',
             '%uid' => $uid,
             '%visible' => $should_be_visible ? 'visible' : 'not visible',
             '%current_uid' => $this->webUser->id(),
-          )));
+          ]));
         }
       }
 
@@ -153,7 +153,7 @@ function testNodeAccessBasic() {
     }
 
     // Now test that a user with 'node test view' permissions can view content.
-    $access_user = $this->drupalCreateUser(array('access content', 'create article content', 'node test view', 'search content'));
+    $access_user = $this->drupalCreateUser(['access content', 'create article content', 'node test view', 'search content']);
     $this->drupalLogin($access_user);
 
     foreach ($this->nodesByUser as $private_status) {
@@ -193,7 +193,7 @@ function testNodeAccessBasic() {
    *   user's own private nodes should be listed.
    */
   protected function assertTaxonomyPage($is_admin) {
-    foreach (array($this->publicTid, $this->privateTid) as $tid_is_private => $tid) {
+    foreach ([$this->publicTid, $this->privateTid] as $tid_is_private => $tid) {
       $this->drupalGet("taxonomy/term/$tid");
       $this->nidsVisible = [];
       foreach ($this->xpath("//a[text()='Read more']") as $link) {
@@ -211,13 +211,13 @@ protected function assertTaxonomyPage($is_admin) {
           if (!$is_admin && $tid_is_private) {
             $should_be_visible = $should_be_visible && $uid == $this->webUser->id();
           }
-          $this->assertIdentical(isset($this->nidsVisible[$nid]), $should_be_visible, strtr('A %private node by user %uid is %visible for user %current_uid on the %tid_is_private page.', array(
+          $this->assertIdentical(isset($this->nidsVisible[$nid]), $should_be_visible, strtr('A %private node by user %uid is %visible for user %current_uid on the %tid_is_private page.', [
             '%private' => $is_private ? 'private' : 'public',
             '%uid' => $uid,
             '%visible' => isset($this->nidsVisible[$nid]) ? 'visible' : 'not visible',
             '%current_uid' => $this->webUser->id(),
             '%tid_is_private' => $tid_is_private ? 'private' : 'public',
-          )));
+          ]));
         }
       }
     }
diff --git a/core/modules/node/src/Tests/NodeAccessPagerTest.php b/core/modules/node/src/Tests/NodeAccessPagerTest.php
index 7db264cd931b46c3e0ef727df750fd36bad2f0e8..b4fe8302e9bd1838a4b51740c6e7af62148a5ae8 100644
--- a/core/modules/node/src/Tests/NodeAccessPagerTest.php
+++ b/core/modules/node/src/Tests/NodeAccessPagerTest.php
@@ -21,15 +21,15 @@ class NodeAccessPagerTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_access_test', 'comment', 'forum');
+  public static $modules = ['node_access_test', 'comment', 'forum'];
 
   protected function setUp() {
     parent::setUp();
 
     node_access_rebuild();
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => t('Basic page')));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => t('Basic page')]);
     $this->addDefaultCommentField('node', 'page');
-    $this->webUser = $this->drupalCreateUser(array('access content', 'access comments', 'node test view'));
+    $this->webUser = $this->drupalCreateUser(['access content', 'access comments', 'node test view']);
   }
 
   /**
@@ -41,16 +41,16 @@ public function testCommentPager() {
 
     // Create 60 comments.
     for ($i = 0; $i < 60; $i++) {
-      $comment = Comment::create(array(
+      $comment = Comment::create([
         'entity_id' => $node->id(),
         'entity_type' => 'node',
         'field_name' => 'comment',
         'subject' => $this->randomMachineName(),
-        'comment_body' => array(
-          array('value' => $this->randomMachineName()),
-        ),
+        'comment_body' => [
+          ['value' => $this->randomMachineName()],
+        ],
         'status' => CommentInterface::PUBLISHED,
-      ));
+      ]);
       $comment->save();
     }
 
@@ -80,13 +80,13 @@ public function testForumPager() {
 
     // Create 30 nodes.
     for ($i = 0; $i < 30; $i++) {
-      $this->drupalCreateNode(array(
+      $this->drupalCreateNode([
         'nid' => NULL,
         'type' => 'forum',
-        'taxonomy_forums' => array(
-          array('target_id' => $tid),
-        ),
-      ));
+        'taxonomy_forums' => [
+          ['target_id' => $tid],
+        ],
+      ]);
     }
 
     // View the general discussion forum page. With the default 25 nodes per
diff --git a/core/modules/node/src/Tests/NodeAccessRebuildNodeGrantsTest.php b/core/modules/node/src/Tests/NodeAccessRebuildNodeGrantsTest.php
index d151aadc3666a4943c5df9d73da36b240d8916dd..251aa882683114cd69576a7dc69ca1d86062ff8f 100644
--- a/core/modules/node/src/Tests/NodeAccessRebuildNodeGrantsTest.php
+++ b/core/modules/node/src/Tests/NodeAccessRebuildNodeGrantsTest.php
@@ -32,7 +32,7 @@ class NodeAccessRebuildNodeGrantsTest extends NodeTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer site configuration', 'access administration pages', 'access site reports'));
+    $this->adminUser = $this->drupalCreateUser(['administer site configuration', 'access administration pages', 'access site reports']);
     $this->drupalLogin($this->adminUser);
 
     $this->webUser = $this->drupalCreateUser();
@@ -50,10 +50,10 @@ public function testNodeAccessRebuildNodeGrants() {
     // Create 30 nodes so that _node_access_rebuild_batch_operation() has to run
     // more than once.
     for ($i = 0; $i < 30; $i++) {
-      $nodes[] = $this->drupalCreateNode(array(
+      $nodes[] = $this->drupalCreateNode([
         'uid' => $this->webUser->id(),
         'private' => [['value' => 1]]
-      ));
+      ]);
     }
 
     /** @var \Drupal\node\NodeGrantDatabaseStorageInterface $grant_storage */
@@ -71,7 +71,7 @@ public function testNodeAccessRebuildNodeGrants() {
     // Rebuild permissions.
     $this->drupalGet('admin/reports/status');
     $this->clickLink(t('Rebuild permissions'));
-    $this->drupalPostForm(NULL, array(), t('Rebuild permissions'));
+    $this->drupalPostForm(NULL, [], t('Rebuild permissions'));
     $this->assertText(t('The content access permissions have been rebuilt.'));
 
     // Test if the rebuild by user that cannot bypass node access and does not
@@ -107,7 +107,7 @@ public function testNodeAccessRebuildNoAccessModules() {
     // Rebuild permissions.
     $this->drupalGet('admin/reports/status');
     $this->clickLink(t('Rebuild permissions'));
-    $this->drupalPostForm(NULL, array(), t('Rebuild permissions'));
+    $this->drupalPostForm(NULL, [], t('Rebuild permissions'));
     $this->assertText(t('Content permissions have been rebuilt.'));
     $this->assertNull(\Drupal::state()->get('node.node_access_needs_rebuild'), 'Node access permissions have been rebuilt');
 
diff --git a/core/modules/node/src/Tests/NodeAdminTest.php b/core/modules/node/src/Tests/NodeAdminTest.php
index 1717bb19c8949763ca3197a329e0ca8cf2ded960..7357d2330dd0e314cc867a15e13a030921f47612 100644
--- a/core/modules/node/src/Tests/NodeAdminTest.php
+++ b/core/modules/node/src/Tests/NodeAdminTest.php
@@ -43,7 +43,7 @@ class NodeAdminTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('views');
+  public static $modules = ['views'];
 
   protected function setUp() {
     parent::setUp();
@@ -51,9 +51,9 @@ protected function setUp() {
     // Remove the "view own unpublished content" permission which is set
     // by default for authenticated users so we can test this permission
     // correctly.
-    user_role_revoke_permissions(RoleInterface::AUTHENTICATED_ID, array('view own unpublished content'));
+    user_role_revoke_permissions(RoleInterface::AUTHENTICATED_ID, ['view own unpublished content']);
 
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'access content overview', 'administer nodes', 'bypass node access'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'access content overview', 'administer nodes', 'bypass node access']);
     $this->baseUser1 = $this->drupalCreateUser(['access content overview']);
     $this->baseUser2 = $this->drupalCreateUser(['access content overview', 'view own unpublished content']);
     $this->baseUser3 = $this->drupalCreateUser(['access content overview', 'bypass node access']);
@@ -66,39 +66,39 @@ function testContentAdminSort() {
     $this->drupalLogin($this->adminUser);
 
     $changed = REQUEST_TIME;
-    foreach (array('dd', 'aa', 'DD', 'bb', 'cc', 'CC', 'AA', 'BB') as $prefix) {
+    foreach (['dd', 'aa', 'DD', 'bb', 'cc', 'CC', 'AA', 'BB'] as $prefix) {
       $changed += 1000;
-      $node = $this->drupalCreateNode(array('title' => $prefix . $this->randomMachineName(6)));
+      $node = $this->drupalCreateNode(['title' => $prefix . $this->randomMachineName(6)]);
       db_update('node_field_data')
-        ->fields(array('changed' => $changed))
+        ->fields(['changed' => $changed])
         ->condition('nid', $node->id())
         ->execute();
     }
 
     // Test that the default sort by node.changed DESC actually fires properly.
     $nodes_query = db_select('node_field_data', 'n')
-      ->fields('n', array('title'))
+      ->fields('n', ['title'])
       ->orderBy('changed', 'DESC')
       ->execute()
       ->fetchCol();
 
     $this->drupalGet('admin/content');
     foreach ($nodes_query as $delta => $string) {
-      $elements = $this->xpath('//table[contains(@class, :class)]/tbody/tr[' . ($delta + 1) . ']/td[2]/a[normalize-space(text())=:label]', array(':class' => 'views-table', ':label' => $string));
+      $elements = $this->xpath('//table[contains(@class, :class)]/tbody/tr[' . ($delta + 1) . ']/td[2]/a[normalize-space(text())=:label]', [':class' => 'views-table', ':label' => $string]);
       $this->assertTrue(!empty($elements), 'The node was found in the correct order.');
     }
 
     // Compare the rendered HTML node list to a query for the nodes ordered by
     // title to account for possible database-dependent sort order.
     $nodes_query = db_select('node_field_data', 'n')
-      ->fields('n', array('title'))
+      ->fields('n', ['title'])
       ->orderBy('title')
       ->execute()
       ->fetchCol();
 
-    $this->drupalGet('admin/content', array('query' => array('sort' => 'asc', 'order' => 'title')));
+    $this->drupalGet('admin/content', ['query' => ['sort' => 'asc', 'order' => 'title']]);
     foreach ($nodes_query as $delta => $string) {
-      $elements = $this->xpath('//table[contains(@class, :class)]/tbody/tr[' . ($delta + 1) . ']/td[2]/a[normalize-space(text())=:label]', array(':class' => 'views-table', ':label' => $string));
+      $elements = $this->xpath('//table[contains(@class, :class)]/tbody/tr[' . ($delta + 1) . ']/td[2]/a[normalize-space(text())=:label]', [':class' => 'views-table', ':label' => $string]);
       $this->assertTrue(!empty($elements), 'The node was found in the correct order.');
     }
   }
@@ -118,10 +118,10 @@ function testContentAdminPages() {
     // they appear in the following code, and the 'content' View has a table
     // style configuration with a default sort on the 'changed' field DESC.
     $time = time();
-    $nodes['published_page'] = $this->drupalCreateNode(array('type' => 'page', 'changed' => $time--));
-    $nodes['published_article'] = $this->drupalCreateNode(array('type' => 'article', 'changed' => $time--));
-    $nodes['unpublished_page_1'] = $this->drupalCreateNode(array('type' => 'page', 'changed' => $time--, 'uid' => $this->baseUser1->id(), 'status' => 0));
-    $nodes['unpublished_page_2'] = $this->drupalCreateNode(array('type' => 'page', 'changed' => $time, 'uid' => $this->baseUser2->id(), 'status' => 0));
+    $nodes['published_page'] = $this->drupalCreateNode(['type' => 'page', 'changed' => $time--]);
+    $nodes['published_article'] = $this->drupalCreateNode(['type' => 'article', 'changed' => $time--]);
+    $nodes['unpublished_page_1'] = $this->drupalCreateNode(['type' => 'page', 'changed' => $time--, 'uid' => $this->baseUser1->id(), 'status' => 0]);
+    $nodes['unpublished_page_2'] = $this->drupalCreateNode(['type' => 'page', 'changed' => $time, 'uid' => $this->baseUser2->id(), 'status' => 0]);
 
     // Verify view, edit, and delete links for any content.
     $this->drupalGet('admin/content');
@@ -139,14 +139,14 @@ function testContentAdminPages() {
     }
 
     // Verify filtering by publishing status.
-    $this->drupalGet('admin/content', array('query' => array('status' => TRUE)));
+    $this->drupalGet('admin/content', ['query' => ['status' => TRUE]]);
 
     $this->assertLinkByHref('node/' . $nodes['published_page']->id() . '/edit');
     $this->assertLinkByHref('node/' . $nodes['published_article']->id() . '/edit');
     $this->assertNoLinkByHref('node/' . $nodes['unpublished_page_1']->id() . '/edit');
 
     // Verify filtering by status and content type.
-    $this->drupalGet('admin/content', array('query' => array('status' => TRUE, 'type' => 'page')));
+    $this->drupalGet('admin/content', ['query' => ['status' => TRUE, 'type' => 'page']]);
 
     $this->assertLinkByHref('node/' . $nodes['published_page']->id() . '/edit');
     $this->assertNoLinkByHref('node/' . $nodes['published_article']->id() . '/edit');
diff --git a/core/modules/node/src/Tests/NodeBlockFunctionalTest.php b/core/modules/node/src/Tests/NodeBlockFunctionalTest.php
index 9579045a60f73cd1cd7a1e9fcfb2a58bda061fa6..5a2e40a30dc9841f5bbd4d5612ce320a8955d5af 100644
--- a/core/modules/node/src/Tests/NodeBlockFunctionalTest.php
+++ b/core/modules/node/src/Tests/NodeBlockFunctionalTest.php
@@ -35,14 +35,14 @@ class NodeBlockFunctionalTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'views');
+  public static $modules = ['block', 'views'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create users and test node.
-    $this->adminUser = $this->drupalCreateUser(array('administer content types', 'administer nodes', 'administer blocks', 'access content overview'));
-    $this->webUser = $this->drupalCreateUser(array('access content', 'create article content'));
+    $this->adminUser = $this->drupalCreateUser(['administer content types', 'administer nodes', 'administer blocks', 'access content overview']);
+    $this->webUser = $this->drupalCreateUser(['access content', 'create article content']);
   }
 
   /**
@@ -52,34 +52,34 @@ public function testRecentNodeBlock() {
     $this->drupalLogin($this->adminUser);
 
     // Disallow anonymous users to view content.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access content' => FALSE,
-    ));
+    ]);
 
     // Enable the recent content block with two items.
-    $block = $this->drupalPlaceBlock('views_block:content_recent-block_1', array('id' => 'test_block', 'items_per_page' => 2));
+    $block = $this->drupalPlaceBlock('views_block:content_recent-block_1', ['id' => 'test_block', 'items_per_page' => 2]);
 
     // Test that block is not visible without nodes.
     $this->drupalGet('');
     $this->assertText(t('No content available.'), 'Block with "No content available." found.');
 
     // Add some test nodes.
-    $default_settings = array('uid' => $this->webUser->id(), 'type' => 'article');
+    $default_settings = ['uid' => $this->webUser->id(), 'type' => 'article'];
     $node1 = $this->drupalCreateNode($default_settings);
     $node2 = $this->drupalCreateNode($default_settings);
     $node3 = $this->drupalCreateNode($default_settings);
 
     // Change the changed time for node so that we can test ordering.
     db_update('node_field_data')
-      ->fields(array(
+      ->fields([
         'changed' => $node1->getChangedTime() + 100,
-      ))
+      ])
       ->condition('nid', $node2->id())
       ->execute();
     db_update('node_field_data')
-      ->fields(array(
+      ->fields([
         'changed' => $node1->getChangedTime() + 200,
-      ))
+      ])
       ->condition('nid', $node3->id())
       ->execute();
 
@@ -131,7 +131,7 @@ public function testRecentNodeBlock() {
     $this->assertTrue(isset($visibility['node_type']['bundles']['article']), 'Visibility settings were saved to configuration');
 
     // Create a page node.
-    $node5 = $this->drupalCreateNode(array('uid' => $this->adminUser->id(), 'type' => 'page'));
+    $node5 = $this->drupalCreateNode(['uid' => $this->adminUser->id(), 'type' => 'page']);
 
     $this->drupalLogout();
     $this->drupalLogin($this->webUser);
diff --git a/core/modules/node/src/Tests/NodeEditFormTest.php b/core/modules/node/src/Tests/NodeEditFormTest.php
index bef0252cc02d59c685624f25058234ef0f59acaa..ed8b34a475d35a8ec7bc6acbcd6e17137e4dadc5 100644
--- a/core/modules/node/src/Tests/NodeEditFormTest.php
+++ b/core/modules/node/src/Tests/NodeEditFormTest.php
@@ -43,8 +43,8 @@ class NodeEditFormTest extends NodeTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array('edit own page content', 'create page content'));
-    $this->adminUser = $this->drupalCreateUser(array('bypass node access', 'administer nodes'));
+    $this->webUser = $this->drupalCreateUser(['edit own page content', 'create page content']);
+    $this->adminUser = $this->drupalCreateUser(['bypass node access', 'administer nodes']);
     $this->drupalPlaceBlock('local_tasks_block');
 
     $this->nodeStorage = $this->container->get('entity.manager')->getStorage('node');
@@ -59,7 +59,7 @@ public function testNodeEdit() {
     $title_key = 'title[0][value]';
     $body_key = 'body[0][value]';
     // Create node to edit.
-    $edit = array();
+    $edit = [];
     $edit[$title_key] = $this->randomMachineName(8);
     $edit[$body_key] = $this->randomMachineName(16);
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
@@ -79,7 +79,7 @@ public function testNodeEdit() {
     $this->assertFieldByName($body_key, $edit[$body_key], 'Body field displayed.');
 
     // Edit the content of the node.
-    $edit = array();
+    $edit = [];
     $edit[$title_key] = $this->randomMachineName(8);
     $edit[$body_key] = $this->randomMachineName(16);
     // Stay on the current page, without reloading.
@@ -90,11 +90,11 @@ public function testNodeEdit() {
     $this->assertText($edit[$body_key], 'Body displayed.');
 
     // Log in as a second administrator user.
-    $second_web_user = $this->drupalCreateUser(array('administer nodes', 'edit any page content'));
+    $second_web_user = $this->drupalCreateUser(['administer nodes', 'edit any page content']);
     $this->drupalLogin($second_web_user);
     // Edit the same node, creating a new revision.
     $this->drupalGet("node/" . $node->id() . "/edit");
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit[$body_key] = $this->randomMachineName(16);
     $edit['revision'] = TRUE;
@@ -140,7 +140,7 @@ public function testNodeEditAuthoredBy() {
 
     // Create node to edit.
     $body_key = 'body[0][value]';
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit[$body_key] = $this->randomMachineName(16);
     $this->drupalPostForm('node/add/page', $edit, t('Save and publish'));
@@ -173,7 +173,7 @@ public function testNodeEditAuthoredBy() {
 
     // Save the node without making any changes.
     $this->drupalPostForm('node/' . $node->id() . '/edit', [], t('Save and keep published'));
-    $this->nodeStorage->resetCache(array($node->id()));
+    $this->nodeStorage->resetCache([$node->id()]);
     $node = $this->nodeStorage->load($node->id());
     $this->assertIdentical($this->webUser->id(), $node->getOwner()->id());
 
@@ -185,7 +185,7 @@ public function testNodeEditAuthoredBy() {
     // Check that saving the node without making any changes keeps the proper
     // author ID.
     $this->drupalPostForm('node/' . $node->id() . '/edit', [], t('Save and keep published'));
-    $this->nodeStorage->resetCache(array($node->id()));
+    $this->nodeStorage->resetCache([$node->id()]);
     $node = $this->nodeStorage->load($node->id());
     $this->assertIdentical($this->webUser->id(), $node->getOwner()->id());
   }
@@ -200,17 +200,17 @@ public function testNodeEditAuthoredBy() {
    */
   protected function checkVariousAuthoredByValues(NodeInterface $node, $form_element_name) {
     // Try to change the 'authored by' field to an invalid user name.
-    $edit = array(
+    $edit = [
       $form_element_name => 'invalid-name',
-    );
+    ];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
-    $this->assertRaw(t('There are no entities matching "%name".', array('%name' => 'invalid-name')));
+    $this->assertRaw(t('There are no entities matching "%name".', ['%name' => 'invalid-name']));
 
     // Change the authored by field to an empty string, which should assign
     // authorship to the anonymous user (uid 0).
     $edit[$form_element_name] = '';
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
-    $this->nodeStorage->resetCache(array($node->id()));
+    $this->nodeStorage->resetCache([$node->id()]);
     $node = $this->nodeStorage->load($node->id());
     $uid = $node->getOwnerId();
     // Most SQL database drivers stringify fetches but entities are not
@@ -229,7 +229,7 @@ protected function checkVariousAuthoredByValues(NodeInterface $node, $form_eleme
     // logged in).
     $edit[$form_element_name] = $this->webUser->getUsername();
     $this->drupalPostForm(NULL, $edit, t('Save and keep published'));
-    $this->nodeStorage->resetCache(array($node->id()));
+    $this->nodeStorage->resetCache([$node->id()]);
     $node = $this->nodeStorage->load($node->id());
     $this->assertIdentical($node->getOwnerId(), $this->webUser->id(), 'Node authored by normal user.');
   }
diff --git a/core/modules/node/src/Tests/NodeEntityViewModeAlterTest.php b/core/modules/node/src/Tests/NodeEntityViewModeAlterTest.php
index 25ae6b68b1bd98a6b77ace81260b0f7a9e2f8f78..79baf9bb772c7060e688b753a2555ebf30cb7940 100644
--- a/core/modules/node/src/Tests/NodeEntityViewModeAlterTest.php
+++ b/core/modules/node/src/Tests/NodeEntityViewModeAlterTest.php
@@ -14,17 +14,17 @@ class NodeEntityViewModeAlterTest extends NodeTestBase {
   /**
    * Enable dummy module that implements hook_ENTITY_TYPE_view() for nodes.
    */
-  public static $modules = array('node_test');
+  public static $modules = ['node_test'];
 
   /**
    * Create a "Basic page" node and verify its consistency in the database.
    */
   function testNodeViewModeChange() {
-    $web_user = $this->drupalCreateUser(array('create page content', 'edit own page content'));
+    $web_user = $this->drupalCreateUser(['create page content', 'edit own page content']);
     $this->drupalLogin($web_user);
 
     // Create a node.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = t('Data that should appear only in the body for the node.');
     $edit['body[0][summary]'] = t('Extra data that should appear only in the teaser for the node.');
diff --git a/core/modules/node/src/Tests/NodeFieldMultilingualTest.php b/core/modules/node/src/Tests/NodeFieldMultilingualTest.php
index 3bd1a51ef6d6f9fdff4797fc040ab6f80154b351..ff01deed294dd715191ddcd73cc80dec05073c58 100644
--- a/core/modules/node/src/Tests/NodeFieldMultilingualTest.php
+++ b/core/modules/node/src/Tests/NodeFieldMultilingualTest.php
@@ -20,31 +20,31 @@ class NodeFieldMultilingualTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'language');
+  public static $modules = ['node', 'language'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create Basic page node type.
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     // Setup users.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'administer content types', 'access administration pages', 'create page content', 'edit own page content'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'administer content types', 'access administration pages', 'create page content', 'edit own page content']);
     $this->drupalLogin($admin_user);
 
     // Add a new language.
     ConfigurableLanguage::createFromLangcode('it')->save();
 
     // Enable URL language detection and selection.
-    $edit = array('language_interface[enabled][language-url]' => '1');
+    $edit = ['language_interface[enabled][language-url]' => '1'];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Set "Basic page" content type to use multilingual support.
-    $edit = array(
+    $edit = [
       'language_configuration[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
-    $this->assertRaw(t('The content type %type has been updated.', array('%type' => 'Basic page')), 'Basic page content type has been updated.');
+    $this->assertRaw(t('The content type %type has been updated.', ['%type' => 'Basic page']), 'Basic page content type has been updated.');
 
     // Make node body translatable.
     $field_storage = FieldStorageConfig::loadByName('node', 'body');
@@ -64,7 +64,7 @@ function testMultilingualNodeForm() {
     $body_value = $this->randomMachineName(16);
 
     // Create node to edit.
-    $edit = array();
+    $edit = [];
     $edit[$title_key] = $title_value;
     $edit[$body_key] = $body_value;
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
@@ -77,17 +77,17 @@ function testMultilingualNodeForm() {
     // Change node language.
     $langcode = 'it';
     $this->drupalGet("node/{$node->id()}/edit");
-    $edit = array(
+    $edit = [
       $title_key => $this->randomMachineName(8),
       'langcode[0][value]' => $langcode,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $node = $this->drupalGetNodeByTitle($edit[$title_key], TRUE);
     $this->assertTrue($node, 'Node found in database.');
     $this->assertTrue($node->language()->getId() == $langcode && $node->body->value == $body_value, 'Field language correctly changed.');
 
     // Enable content language URL detection.
-    $this->container->get('language_negotiator')->saveConfiguration(LanguageInterface::TYPE_CONTENT, array(LanguageNegotiationUrl::METHOD_ID => 0));
+    $this->container->get('language_negotiator')->saveConfiguration(LanguageInterface::TYPE_CONTENT, [LanguageNegotiationUrl::METHOD_ID => 0]);
 
     // Test multilingual field language fallback logic.
     $this->drupalGet("it/node/{$node->id()}");
@@ -108,7 +108,7 @@ function testMultilingualDisplaySettings() {
     $body_value = $this->randomMachineName(16);
 
     // Create node to edit.
-    $edit = array();
+    $edit = [];
     $edit[$title_key] = $title_value;
     $edit[$body_key] = $body_value;
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
@@ -119,10 +119,10 @@ function testMultilingualDisplaySettings() {
 
     // Check if node body is showed.
     $this->drupalGet('node/' . $node->id());
-    $body = $this->xpath('//article[contains(concat(" ", normalize-space(@class), " "), :node-class)]//div[contains(concat(" ", normalize-space(@class), " "), :content-class)]/descendant::p', array(
+    $body = $this->xpath('//article[contains(concat(" ", normalize-space(@class), " "), :node-class)]//div[contains(concat(" ", normalize-space(@class), " "), :content-class)]/descendant::p', [
       ':node-class' => ' node ',
       ':content-class' => 'node__content',
-    ));
+    ]);
     $this->assertEqual(current($body), $node->body->value, 'Node body found.');
   }
 
diff --git a/core/modules/node/src/Tests/NodeFormButtonsTest.php b/core/modules/node/src/Tests/NodeFormButtonsTest.php
index 9f6732bfc206f6f9c7381bf734af4f43c9f0c9e0..9f98007cb9d0c04626f4ad541ee3f632b4bceb7f 100644
--- a/core/modules/node/src/Tests/NodeFormButtonsTest.php
+++ b/core/modules/node/src/Tests/NodeFormButtonsTest.php
@@ -29,9 +29,9 @@ protected function setUp() {
     parent::setUp();
 
     // Create a user that has no access to change the state of the node.
-    $this->webUser = $this->drupalCreateUser(array('create article content', 'edit own article content'));
+    $this->webUser = $this->drupalCreateUser(['create article content', 'edit own article content']);
     // Create a user that has access to change the state of the node.
-    $this->adminUser = $this->drupalCreateUser(array('administer nodes', 'bypass node access'));
+    $this->adminUser = $this->drupalCreateUser(['administer nodes', 'bypass node access']);
   }
 
   /**
@@ -44,11 +44,11 @@ function testNodeFormButtons() {
 
     // Verify the buttons on a node add form.
     $this->drupalGet('node/add/article');
-    $this->assertButtons(array(t('Save and publish'), t('Save as unpublished')));
+    $this->assertButtons([t('Save and publish'), t('Save as unpublished')]);
 
     // Save the node and assert it's published after clicking
     // 'Save and publish'.
-    $edit = array('title[0][value]' => $this->randomString());
+    $edit = ['title[0][value]' => $this->randomString()];
     $this->drupalPostForm('node/add/article', $edit, t('Save and publish'));
 
     // Get the node.
@@ -57,25 +57,25 @@ function testNodeFormButtons() {
 
     // Verify the buttons on a node edit form.
     $this->drupalGet('node/' . $node_1->id() . '/edit');
-    $this->assertButtons(array(t('Save and keep published'), t('Save and unpublish')));
+    $this->assertButtons([t('Save and keep published'), t('Save and unpublish')]);
 
     // Save the node and verify it's still published after clicking
     // 'Save and keep published'.
     $this->drupalPostForm(NULL, $edit, t('Save and keep published'));
-    $node_storage->resetCache(array(1));
+    $node_storage->resetCache([1]);
     $node_1 = $node_storage->load(1);
     $this->assertTrue($node_1->isPublished(), 'Node is published');
 
     // Save the node and verify it's unpublished after clicking
     // 'Save and unpublish'.
     $this->drupalPostForm('node/' . $node_1->id() . '/edit', $edit, t('Save and unpublish'));
-    $node_storage->resetCache(array(1));
+    $node_storage->resetCache([1]);
     $node_1 = $node_storage->load(1);
     $this->assertFalse($node_1->isPublished(), 'Node is unpublished');
 
     // Verify the buttons on an unpublished node edit screen.
     $this->drupalGet('node/' . $node_1->id() . '/edit');
-    $this->assertButtons(array(t('Save and keep unpublished'), t('Save and publish')));
+    $this->assertButtons([t('Save and keep unpublished'), t('Save and publish')]);
 
     // Create a node as a normal user.
     $this->drupalLogout();
@@ -83,10 +83,10 @@ function testNodeFormButtons() {
 
     // Verify the buttons for a normal user.
     $this->drupalGet('node/add/article');
-    $this->assertButtons(array(t('Save')), FALSE);
+    $this->assertButtons([t('Save')], FALSE);
 
     // Create the node.
-    $edit = array('title[0][value]' => $this->randomString());
+    $edit = ['title[0][value]' => $this->randomString()];
     $this->drupalPostForm('node/add/article', $edit, t('Save'));
     $node_2 = $node_storage->load(2);
     $this->assertTrue($node_2->isPublished(), 'Node is published');
@@ -95,8 +95,8 @@ function testNodeFormButtons() {
     // was created by the normal user.
     $this->drupalLogout();
     $this->drupalLogin($this->adminUser);
-    $this->drupalPostForm('node/' . $node_2->id() . '/edit', array(), t('Save and unpublish'));
-    $node_storage->resetCache(array(2));
+    $this->drupalPostForm('node/' . $node_2->id() . '/edit', [], t('Save and unpublish'));
+    $node_storage->resetCache([2]);
     $node_2 = $node_storage->load(2);
     $this->assertFalse($node_2->isPublished(), 'Node is unpublished');
 
@@ -104,8 +104,8 @@ function testNodeFormButtons() {
     // it's still unpublished.
     $this->drupalLogout();
     $this->drupalLogin($this->webUser);
-    $this->drupalPostForm('node/' . $node_2->id() . '/edit', array(), t('Save'));
-    $node_storage->resetCache(array(2));
+    $this->drupalPostForm('node/' . $node_2->id() . '/edit', [], t('Save'));
+    $node_storage->resetCache([2]);
     $node_2 = $node_storage->load(2);
     $this->assertFalse($node_2->isPublished(), 'Node is still unpublished');
     $this->drupalLogout();
@@ -121,12 +121,12 @@ function testNodeFormButtons() {
     // Verify the buttons on a node add form for an administrator.
     $this->drupalLogin($this->adminUser);
     $this->drupalGet('node/add/article');
-    $this->assertButtons(array(t('Save as unpublished'), t('Save and publish')));
+    $this->assertButtons([t('Save as unpublished'), t('Save and publish')]);
 
     // Verify the node is unpublished by default for a normal user.
     $this->drupalLogout();
     $this->drupalLogin($this->webUser);
-    $edit = array('title[0][value]' => $this->randomString());
+    $edit = ['title[0][value]' => $this->randomString()];
     $this->drupalPostForm('node/add/article', $edit, t('Save'));
     $node_3 = $node_storage->load(3);
     $this->assertFalse($node_3->isPublished(), 'Node is unpublished');
diff --git a/core/modules/node/src/Tests/NodeQueryAlterTest.php b/core/modules/node/src/Tests/NodeQueryAlterTest.php
index 022625bdcb021604b534f480eda8b2b5b8de75d6..ad63d6bc574293f974e08ee65d50ecb08393f449 100644
--- a/core/modules/node/src/Tests/NodeQueryAlterTest.php
+++ b/core/modules/node/src/Tests/NodeQueryAlterTest.php
@@ -14,7 +14,7 @@ class NodeQueryAlterTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_access_test');
+  public static $modules = ['node_access_test'];
 
   /**
    * User with permission to view content.
@@ -39,9 +39,9 @@ protected function setUp() {
 
     // Create user with simple node access permission. The 'node test view'
     // permission is implemented and granted by the node_access_test module.
-    $this->accessUser = $this->drupalCreateUser(array('access content overview', 'access content', 'node test view'));
-    $this->noAccessUser = $this->drupalCreateUser(array('access content overview', 'access content'));
-    $this->noAccessUser2 = $this->drupalCreateUser(array('access content overview', 'access content'));
+    $this->accessUser = $this->drupalCreateUser(['access content overview', 'access content', 'node test view']);
+    $this->noAccessUser = $this->drupalCreateUser(['access content overview', 'access content']);
+    $this->noAccessUser2 = $this->drupalCreateUser(['access content overview', 'access content']);
   }
 
   /**
@@ -143,14 +143,14 @@ function testNodeQueryAlterLowLevelEditAccess() {
    * hook_node_grants().
    */
   function testNodeQueryAlterOverride() {
-    $record = array(
+    $record = [
       'nid' => 0,
       'gid' => 0,
       'realm' => 'node_access_all',
       'grant_view' => 1,
       'grant_update' => 0,
       'grant_delete' => 0,
-    );
+    ];
     db_insert('node_access')->fields($record)->execute();
 
     // Test that the noAccessUser still doesn't have the 'view'
diff --git a/core/modules/node/src/Tests/NodeRevisionPermissionsTest.php b/core/modules/node/src/Tests/NodeRevisionPermissionsTest.php
index e000fb808f9f495b86bfe03463e321d6d50a523d..6f1409dcaa2dc54460529801f78d8bfabbd3e5b8 100644
--- a/core/modules/node/src/Tests/NodeRevisionPermissionsTest.php
+++ b/core/modules/node/src/Tests/NodeRevisionPermissionsTest.php
@@ -21,30 +21,30 @@ class NodeRevisionPermissionsTest extends NodeTestBase {
    *
    * @var array
    */
-  protected $accounts = array();
+  protected $accounts = [];
 
   // Map revision permission names to node revision access ops.
-  protected $map = array(
+  protected $map = [
     'view' => 'view all revisions',
     'update' => 'revert all revisions',
     'delete' => 'delete all revisions',
-  );
+  ];
 
   // Map revision permission names to node type revision access ops.
-  protected $typeMap = array(
+  protected $typeMap = [
     'view' => 'view page revisions',
     'update' => 'revert page revisions',
     'delete' => 'delete page revisions',
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
 
-    $types = array('page', 'article');
+    $types = ['page', 'article'];
 
     foreach ($types as $type) {
       // Create a node with several revisions.
-      $nodes[$type] = $this->drupalCreateNode(array('type' => $type));
+      $nodes[$type] = $this->drupalCreateNode(['type' => $type]);
       $this->nodeRevisions[$type][] = $nodes[$type];
 
       for ($i = 0; $i < 3; $i++) {
@@ -66,19 +66,19 @@ function testNodeRevisionAccessAnyType() {
     foreach ($this->map as $op => $permission) {
       // Create the user.
       $account = $this->drupalCreateUser(
-        array(
+        [
           'access content',
           'edit any page content',
           'delete any page content',
           $permission,
-        )
+        ]
       );
       $account->op = $op;
       $this->accounts[] = $account;
     }
 
     // Create an admin account (returns TRUE for all revision permissions).
-    $admin_account = $this->drupalCreateUser(array('access content', 'administer nodes'));
+    $admin_account = $this->drupalCreateUser(['access content', 'administer nodes']);
     $admin_account->is_admin = TRUE;
     $this->accounts['admin'] = $admin_account;
     $accounts['admin'] = $admin_account;
@@ -90,17 +90,17 @@ function testNodeRevisionAccessAnyType() {
     $accounts[] = $normal_account;
     $revision = $this->nodeRevisions['page'][1];
 
-    $parameters = array(
+    $parameters = [
       'op' => array_keys($this->map),
       'account' => $this->accounts,
-    );
+    ];
 
     $permutations = $this->generatePermutations($parameters);
 
     $node_revision_access = \Drupal::service('access_check.node.revision');
     foreach ($permutations as $case) {
       // Skip this test if there are no revisions for the node.
-      if (!($revision->isDefaultRevision() && (db_query('SELECT COUNT(vid) FROM {node_field_revision} WHERE nid = :nid', array(':nid' => $revision->id()))->fetchField() == 1 || $case['op'] == 'update' || $case['op'] == 'delete'))) {
+      if (!($revision->isDefaultRevision() && (db_query('SELECT COUNT(vid) FROM {node_field_revision} WHERE nid = :nid', [':nid' => $revision->id()])->fetchField() == 1 || $case['op'] == 'update' || $case['op'] == 'delete'))) {
         if (!empty($case['account']->is_admin) || $case['account']->hasPermission($this->map[$case['op']])) {
           $this->assertTrue($node_revision_access->checkAccess($revision, $case['account'], $case['op']), "{$this->map[$case['op']]} granted.");
         }
@@ -124,21 +124,21 @@ function testNodeRevisionAccessPerType() {
     foreach ($this->typeMap as $op => $permission) {
       // Create the user.
       $account = $this->drupalCreateUser(
-        array(
+        [
           'access content',
           'edit any page content',
           'delete any page content',
           $permission,
-        )
+        ]
       );
       $account->op = $op;
       $accounts[] = $account;
     }
 
-    $parameters = array(
+    $parameters = [
       'op' => array_keys($this->typeMap),
       'account' => $accounts,
-    );
+    ];
 
     // Test that the accounts have access to the corresponding page revision
     // permissions.
@@ -148,7 +148,7 @@ function testNodeRevisionAccessPerType() {
     $node_revision_access = \Drupal::service('access_check.node.revision');
     foreach ($permutations as $case) {
       // Skip this test if there are no revisions for the node.
-      if (!($revision->isDefaultRevision() && (db_query('SELECT COUNT(vid) FROM {node_field_revision} WHERE nid = :nid', array(':nid' => $revision->id()))->fetchField() == 1 || $case['op'] == 'update' || $case['op'] == 'delete'))) {
+      if (!($revision->isDefaultRevision() && (db_query('SELECT COUNT(vid) FROM {node_field_revision} WHERE nid = :nid', [':nid' => $revision->id()])->fetchField() == 1 || $case['op'] == 'update' || $case['op'] == 'delete'))) {
         if (!empty($case['account']->is_admin) || $case['account']->hasPermission($this->typeMap[$case['op']], $case['account'])) {
           $this->assertTrue($node_revision_access->checkAccess($revision, $case['account'], $case['op']), "{$this->typeMap[$case['op']]} granted.");
         }
diff --git a/core/modules/node/src/Tests/NodeRevisionsTest.php b/core/modules/node/src/Tests/NodeRevisionsTest.php
index bfdd213f4100bb161f523942ac84353ab2e2f34d..19798631f5b7a8534b6de905bf4e3327ab0f36fa 100644
--- a/core/modules/node/src/Tests/NodeRevisionsTest.php
+++ b/core/modules/node/src/Tests/NodeRevisionsTest.php
@@ -47,26 +47,26 @@ protected function setUp() {
     ConfigurableLanguage::createFromLangcode('de')->save();
     ConfigurableLanguage::createFromLangcode('it')->save();
 
-    $field_storage_definition = array(
+    $field_storage_definition = [
       'field_name' => 'untranslatable_string_field',
       'entity_type' => 'node',
       'type' => 'string',
       'cardinality' => 1,
       'translatable' => FALSE,
-    );
+    ];
     $field_storage = FieldStorageConfig::create($field_storage_definition);
     $field_storage->save();
 
-    $field_definition = array(
+    $field_definition = [
       'field_storage' => $field_storage,
       'bundle' => 'page',
-    );
+    ];
     $field = FieldConfig::create($field_definition);
     $field->save();
 
     // Create and log in user.
     $web_user = $this->drupalCreateUser(
-      array(
+      [
         'view page revisions',
         'revert page revisions',
         'delete page revisions',
@@ -75,7 +75,7 @@ protected function setUp() {
         'access contextual links',
         'translate any entity',
         'administer content types',
-      )
+      ]
     );
 
     $this->drupalLogin($web_user);
@@ -86,8 +86,8 @@ protected function setUp() {
     $settings['revision'] = 1;
     $settings['isDefaultRevision'] = TRUE;
 
-    $nodes = array();
-    $logs = array();
+    $nodes = [];
+    $logs = [];
 
     // Get original node.
     $nodes[] = clone $node;
@@ -99,10 +99,10 @@ protected function setUp() {
 
       // Create revision with a random title and body and update variables.
       $node->title = $this->randomMachineName();
-      $node->body = array(
+      $node->body = [
         'value' => $this->randomMachineName(32),
         'format' => filter_default_format(),
-      );
+      ];
       $node->untranslatable_string_field->value = $this->randomString();
       $node->setNewRevision();
 
@@ -167,11 +167,11 @@ function testRevisions() {
 
 
     // Confirm that revisions revert properly.
-    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionid() . "/revert", array(), t('Revert'));
+    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionid() . "/revert", [], t('Revert'));
     $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.',
-                        array('@type' => 'Basic page', '%title' => $nodes[1]->label(),
-                              '%revision-date' => format_date($nodes[1]->getRevisionCreationTime()))), 'Revision reverted.');
-    $node_storage->resetCache(array($node->id()));
+                        ['@type' => 'Basic page', '%title' => $nodes[1]->label(),
+                              '%revision-date' => format_date($nodes[1]->getRevisionCreationTime())]), 'Revision reverted.');
+    $node_storage->resetCache([$node->id()]);
     $reverted_node = $node_storage->load($node->id());
     $this->assertTrue(($nodes[1]->body->value == $reverted_node->body->value), 'Node reverted correctly.');
 
@@ -190,27 +190,27 @@ function testRevisions() {
 
 
     // Confirm revisions delete properly.
-    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/delete", array(), t('Delete'));
+    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/delete", [], t('Delete'));
     $this->assertRaw(t('Revision from %revision-date of @type %title has been deleted.',
-                        array('%revision-date' => format_date($nodes[1]->getRevisionCreationTime()),
-                              '@type' => 'Basic page', '%title' => $nodes[1]->label())), 'Revision deleted.');
-    $this->assertTrue(db_query('SELECT COUNT(vid) FROM {node_revision} WHERE nid = :nid and vid = :vid', array(':nid' => $node->id(), ':vid' => $nodes[1]->getRevisionId()))->fetchField() == 0, 'Revision not found.');
+                        ['%revision-date' => format_date($nodes[1]->getRevisionCreationTime()),
+                              '@type' => 'Basic page', '%title' => $nodes[1]->label()]), 'Revision deleted.');
+    $this->assertTrue(db_query('SELECT COUNT(vid) FROM {node_revision} WHERE nid = :nid and vid = :vid', [':nid' => $node->id(), ':vid' => $nodes[1]->getRevisionId()])->fetchField() == 0, 'Revision not found.');
 
     // Set the revision timestamp to an older date to make sure that the
     // confirmation message correctly displays the stored revision date.
     $old_revision_date = REQUEST_TIME - 86400;
     db_update('node_revision')
       ->condition('vid', $nodes[2]->getRevisionId())
-      ->fields(array(
+      ->fields([
         'revision_timestamp' => $old_revision_date,
-      ))
+      ])
       ->execute();
-    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[2]->getRevisionId() . "/revert", array(), t('Revert'));
-    $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.', array(
+    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[2]->getRevisionId() . "/revert", [], t('Revert'));
+    $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.', [
       '@type' => 'Basic page',
       '%title' => $nodes[2]->label(),
       '%revision-date' => format_date($old_revision_date),
-    )));
+    ]));
 
     // Make a new revision and set it to not be default.
     // This will create a new revision that is not "front facing".
@@ -232,7 +232,7 @@ function testRevisions() {
     // Verify that the non-default revision vid is greater than the default
     // revision vid.
     $default_revision = db_select('node', 'n')
-      ->fields('n', array('vid'))
+      ->fields('n', ['vid'])
       ->condition('nid', $node->id())
       ->execute()
       ->fetchCol();
@@ -301,7 +301,7 @@ function testNodeRevisionWithoutLogMessage() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     // Create a node with an initial log message.
     $revision_log = $this->randomMachineName(10);
-    $node = $this->drupalCreateNode(array('revision_log' => $revision_log));
+    $node = $this->drupalCreateNode(['revision_log' => $revision_log]);
 
     // Save over the same revision and explicitly provide an empty log message
     // (for example, to mimic the case of a node form submitted with no text in
@@ -317,12 +317,12 @@ function testNodeRevisionWithoutLogMessage() {
     $node->save();
     $this->drupalGet('node/' . $node->id());
     $this->assertText($new_title, 'New node title appears on the page.');
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $node_revision = $node_storage->load($node->id());
     $this->assertEqual($node_revision->revision_log->value, $revision_log, 'After an existing node revision is re-saved without a log message, the original log message is preserved.');
 
     // Create another node with an initial revision log message.
-    $node = $this->drupalCreateNode(array('revision_log' => $revision_log));
+    $node = $this->drupalCreateNode(['revision_log' => $revision_log]);
 
     // Save a new node revision without providing a log message, and check that
     // this revision has an empty log message.
@@ -336,7 +336,7 @@ function testNodeRevisionWithoutLogMessage() {
     $node->save();
     $this->drupalGet('node/' . $node->id());
     $this->assertText($new_title, 'New node title appears on the page.');
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $node_revision = $node_storage->load($node->id());
     $this->assertTrue(empty($node_revision->revision_log->value), 'After a new node revision is saved with an empty log message, the log message for the node is empty.');
   }
@@ -353,7 +353,7 @@ function testNodeRevisionWithoutLogMessage() {
    *   The decoded JSON response body.
    */
   protected function renderContextualLinks(array $ids, $current_path) {
-    $post = array();
+    $post = [];
     for ($i = 0; $i < count($ids); $i++) {
       $post['ids[' . $i . ']'] = $ids[$i];
     }
diff --git a/core/modules/node/src/Tests/NodeSyndicateBlockTest.php b/core/modules/node/src/Tests/NodeSyndicateBlockTest.php
index 31b216f5696b8d7c45cea2d53836d8d3d07b4002..23c3d881a7c0232e5e1ad4bb895ac826be50d8b3 100644
--- a/core/modules/node/src/Tests/NodeSyndicateBlockTest.php
+++ b/core/modules/node/src/Tests/NodeSyndicateBlockTest.php
@@ -14,13 +14,13 @@ class NodeSyndicateBlockTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('block');
+  public static $modules = ['block'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create a user and log in.
-    $admin_user = $this->drupalCreateUser(array('administer blocks'));
+    $admin_user = $this->drupalCreateUser(['administer blocks']);
     $this->drupalLogin($admin_user);
   }
 
@@ -29,7 +29,7 @@ protected function setUp() {
    */
   public function testSyndicateBlock() {
     // Place the "Syndicate" block and confirm that it is rendered.
-    $this->drupalPlaceBlock('node_syndicate_block', array('id' => 'test_syndicate_block'));
+    $this->drupalPlaceBlock('node_syndicate_block', ['id' => 'test_syndicate_block']);
     $this->drupalGet('');
     $this->assertFieldByXPath('//div[@id="block-test-syndicate-block"]/*', NULL, 'Syndicate block found.');
   }
diff --git a/core/modules/node/src/Tests/NodeTestBase.php b/core/modules/node/src/Tests/NodeTestBase.php
index a5da2b4f5bf019cc6dc1ed844a1a154d067839f1..d5a349de1aa152f362d3d19d40c993c87f3335d8 100644
--- a/core/modules/node/src/Tests/NodeTestBase.php
+++ b/core/modules/node/src/Tests/NodeTestBase.php
@@ -19,7 +19,7 @@ abstract class NodeTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'datetime');
+  public static $modules = ['node', 'datetime'];
 
   /**
    * The node access control handler.
@@ -36,12 +36,12 @@ protected function setUp() {
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array(
+      $this->drupalCreateContentType([
         'type' => 'page',
         'name' => 'Basic page',
         'display_submitted' => FALSE,
-      ));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      ]);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
     $this->accessHandler = \Drupal::entityManager()->getAccessControlHandler('node');
   }
@@ -79,9 +79,9 @@ function assertNodeAccess(array $ops, NodeInterface $node, AccountInterface $acc
    *   to check. If NULL, the untranslated (fallback) access is checked.
    */
   function assertNodeCreateAccess($bundle, $result, AccountInterface $account, $langcode = NULL) {
-    $this->assertEqual($result, $this->accessHandler->createAccess($bundle, $account, array(
+    $this->assertEqual($result, $this->accessHandler->createAccess($bundle, $account, [
       'langcode' => $langcode,
-    )), $this->nodeAccessAssertMessage('create', $result, $langcode));
+    ]), $this->nodeAccessAssertMessage('create', $result, $langcode));
   }
 
   /**
@@ -102,11 +102,11 @@ function assertNodeCreateAccess($bundle, $result, AccountInterface $account, $la
   function nodeAccessAssertMessage($operation, $result, $langcode = NULL) {
     return format_string(
       'Node access returns @result with operation %op, language code %langcode.',
-      array(
+      [
         '@result' => $result ? 'true' : 'false',
         '%op' => $operation,
         '%langcode' => !empty($langcode) ? $langcode : 'empty'
-      )
+      ]
     );
   }
 
diff --git a/core/modules/node/src/Tests/NodeTitleTest.php b/core/modules/node/src/Tests/NodeTitleTest.php
index 59ee0214940d4d2c77480bf3916426bf052c230e..986be79438039e26dc15f5ac08715ff55862a996 100644
--- a/core/modules/node/src/Tests/NodeTitleTest.php
+++ b/core/modules/node/src/Tests/NodeTitleTest.php
@@ -19,7 +19,7 @@ class NodeTitleTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('comment', 'views', 'block');
+  public static $modules = ['comment', 'views', 'block'];
 
   /**
    * A user with permission to bypass access content.
@@ -35,7 +35,7 @@ protected function setUp() {
     parent::setUp();
     $this->drupalPlaceBlock('system_breadcrumb_block');
 
-    $this->adminUser = $this->drupalCreateUser(array('administer nodes', 'create article content', 'create page content', 'post comments'));
+    $this->adminUser = $this->drupalCreateUser(['administer nodes', 'create article content', 'create page content', 'post comments']);
     $this->drupalLogin($this->adminUser);
     $this->addDefaultCommentField('node', 'page');
   }
@@ -47,10 +47,10 @@ function testNodeTitle() {
     // Create "Basic page" content with title.
     // Add the node to the frontpage so we can test if teaser links are
     // clickable.
-    $settings = array(
+    $settings = [
       'title' => $this->randomMachineName(8),
       'promote' => 1,
-    );
+    ];
     $node = $this->drupalCreateNode($settings);
 
     // Test <title> tag.
@@ -64,16 +64,16 @@ function testNodeTitle() {
     $this->assertEqual(current($this->xpath($xpath)), $node->label(), 'Node breadcrumb is equal to node title.', 'Node');
 
     // Test node title in comment preview.
-    $this->assertEqual(current($this->xpath('//article[contains(concat(" ", normalize-space(@class), " "), :node-class)]/h2/a/span', array(':node-class' => ' node--type-' . $node->bundle() . ' '))), $node->label(), 'Node preview title is equal to node title.', 'Node');
+    $this->assertEqual(current($this->xpath('//article[contains(concat(" ", normalize-space(@class), " "), :node-class)]/h2/a/span', [':node-class' => ' node--type-' . $node->bundle() . ' '])), $node->label(), 'Node preview title is equal to node title.', 'Node');
 
     // Test node title is clickable on teaser list (/node).
     $this->drupalGet('node');
     $this->clickLink($node->label());
 
     // Test edge case where node title is set to 0.
-    $settings = array(
+    $settings = [
       'title' => 0,
-    );
+    ];
     $node = $this->drupalCreateNode($settings);
     // Test that 0 appears as <title>.
     $this->drupalGet('node/' . $node->id());
@@ -84,9 +84,9 @@ function testNodeTitle() {
 
     // Test edge case where node title contains special characters.
     $edge_case_title = 'article\'s "title".';
-    $settings = array(
+    $settings = [
       'title' => $edge_case_title,
-    );
+    ];
     $node = $this->drupalCreateNode($settings);
     // Test that the title appears as <title>. The title will be escaped on the
     // the page.
diff --git a/core/modules/node/src/Tests/NodeTitleXSSTest.php b/core/modules/node/src/Tests/NodeTitleXSSTest.php
index c41027514a3a205a7ddb76d7ea8c43345df07f44..7b4890eb0c5c31000d35082d8e331a92269849e8 100644
--- a/core/modules/node/src/Tests/NodeTitleXSSTest.php
+++ b/core/modules/node/src/Tests/NodeTitleXSSTest.php
@@ -16,18 +16,18 @@ class NodeTitleXSSTest extends NodeTestBase {
    */
   function testNodeTitleXSS() {
     // Prepare a user to do the stuff.
-    $web_user = $this->drupalCreateUser(array('create page content', 'edit any page content'));
+    $web_user = $this->drupalCreateUser(['create page content', 'edit any page content']);
     $this->drupalLogin($web_user);
 
     $xss = '<script>alert("xss")</script>';
     $title = $xss . $this->randomMachineName();
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $title;
 
     $this->drupalPostForm('node/add/page', $edit, t('Preview'));
     $this->assertNoRaw($xss, 'Harmful tags are escaped when previewing a node.');
 
-    $settings = array('title' => $title);
+    $settings = ['title' => $title];
     $node = $this->drupalCreateNode($settings);
 
     $this->drupalGet('node/' . $node->id());
diff --git a/core/modules/node/src/Tests/NodeTranslationUITest.php b/core/modules/node/src/Tests/NodeTranslationUITest.php
index 063469d38abdbc61e15ccf012dd0f807e3fc8a38..a01c4d5c39ac195d0587defc15931b03259a602f 100644
--- a/core/modules/node/src/Tests/NodeTranslationUITest.php
+++ b/core/modules/node/src/Tests/NodeTranslationUITest.php
@@ -35,7 +35,7 @@ class NodeTranslationUITest extends ContentTranslationUITestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'language', 'content_translation', 'node', 'datetime', 'field_ui', 'help');
+  public static $modules = ['block', 'language', 'content_translation', 'node', 'datetime', 'field_ui', 'help'];
 
   /**
    * The profile to install as a basis for testing.
@@ -50,11 +50,11 @@ protected function setUp() {
     parent::setUp();
 
     // Ensure the help message is shown even with prefixed paths.
-    $this->drupalPlaceBlock('help_block', array('region' => 'content'));
+    $this->drupalPlaceBlock('help_block', ['region' => 'content']);
 
     // Display the language selector.
     $this->drupalLogin($this->administrator);
-    $edit = array('language_configuration[language_alterable]' => TRUE);
+    $edit = ['language_configuration[language_alterable]' => TRUE];
     $this->drupalPostForm('admin/structure/types/manage/article', $edit, t('Save content type'));
     $this->drupalLogin($this->translator);
   }
@@ -75,13 +75,13 @@ public function testPublishedStatusNoFields() {
     $this->drupalLogin($this->administrator);
     // Delete all fields.
     $this->drupalGet('admin/structure/types/manage/article/fields');
-    $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.' . $this->fieldName . '/delete', array(), t('Delete'));
-    $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.field_tags/delete', array(), t('Delete'));
-    $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.field_image/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.' . $this->fieldName . '/delete', [], t('Delete'));
+    $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.field_tags/delete', [], t('Delete'));
+    $this->drupalPostForm('admin/structure/types/manage/article/fields/node.article.field_image/delete', [], t('Delete'));
 
     // Add a node.
     $default_langcode = $this->langcodes[0];
-    $values[$default_langcode] = array('title' => array(array('value' => $this->randomMachineName())));
+    $values[$default_langcode] = ['title' => [['value' => $this->randomMachineName()]]];
     $entity_id = $this->createEntity($values[$default_langcode], $default_langcode);
     $storage = $this->container->get('entity_type.manager')
       ->getStorage($this->entityTypeId);
@@ -91,14 +91,14 @@ public function testPublishedStatusNoFields() {
     // Add a content translation.
     $langcode = 'fr';
     $language = ConfigurableLanguage::load($langcode);
-    $values[$langcode] = array('title' => array(array('value' => $this->randomMachineName())));
+    $values[$langcode] = ['title' => [['value' => $this->randomMachineName()]]];
 
     $entity_type_id = $entity->getEntityTypeId();
     $add_url = Url::fromRoute("entity.$entity_type_id.content_translation_add", [
       $entity->getEntityTypeId() => $entity->id(),
       'source' => $default_langcode,
       'target' => $langcode
-    ], array('language' => $language));
+    ], ['language' => $language]);
     $this->drupalPostForm($add_url, $this->getEditValues($values, $langcode), t('Save and unpublish (this translation)'));
 
     $storage->resetCache([$this->entityId]);
@@ -112,28 +112,28 @@ public function testPublishedStatusNoFields() {
    * {@inheritdoc}
    */
   protected function getTranslatorPermissions() {
-    return array_merge(parent::getTranslatorPermissions(), array('administer nodes', "edit any $this->bundle content"));
+    return array_merge(parent::getTranslatorPermissions(), ['administer nodes', "edit any $this->bundle content"]);
   }
 
   /**
    * {@inheritdoc}
    */
   protected function getEditorPermissions() {
-    return array('administer nodes', 'create article content');
+    return ['administer nodes', 'create article content'];
   }
 
   /**
    * {@inheritdoc}
    */
   protected function getAdministratorPermissions() {
-    return array_merge(parent::getAdministratorPermissions(), array('access administration pages', 'administer content types', 'administer node fields', 'access content overview', 'bypass node access', 'administer languages', 'administer themes', 'view the administration theme'));
+    return array_merge(parent::getAdministratorPermissions(), ['access administration pages', 'administer content types', 'administer node fields', 'access content overview', 'bypass node access', 'administer languages', 'administer themes', 'view the administration theme']);
   }
 
   /**
    * {@inheritdoc}
    */
   protected function getNewEntityValues($langcode) {
-    return array('title' => array(array('value' => $this->randomMachineName()))) + parent::getNewEntityValues($langcode);
+    return ['title' => [['value' => $this->randomMachineName()]]] + parent::getNewEntityValues($langcode);
   }
 
   /**
@@ -158,18 +158,18 @@ protected function doTestPublishedStatus() {
     $entity = $storage->load($this->entityId);
     $languages = $this->container->get('language_manager')->getLanguages();
 
-    $actions = array(
+    $actions = [
       t('Save and keep published'),
       t('Save and unpublish'),
-    );
+    ];
 
     foreach ($actions as $index => $action) {
       // (Un)publish the node translations and check that the translation
       // statuses are (un)published accordingly.
       foreach ($this->langcodes as $langcode) {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
-        $this->drupalPostForm($url, array(), $action . $this->getFormSubmitSuffix($entity, $langcode), $options);
+        $this->drupalPostForm($url, [], $action . $this->getFormSubmitSuffix($entity, $langcode), $options);
       }
       $storage->resetCache([$this->entityId]);
       $entity = $storage->load($this->entityId);
@@ -192,25 +192,25 @@ protected function doTestAuthoringInfo() {
     $storage->resetCache([$this->entityId]);
     $entity = $storage->load($this->entityId);
     $languages = $this->container->get('language_manager')->getLanguages();
-    $values = array();
+    $values = [];
 
     // Post different base field information for each translation.
     foreach ($this->langcodes as $langcode) {
       $user = $this->drupalCreateUser();
-      $values[$langcode] = array(
+      $values[$langcode] = [
         'uid' => $user->id(),
         'created' => REQUEST_TIME - mt_rand(0, 1000),
         'sticky' => (bool) mt_rand(0, 1),
         'promote' => (bool) mt_rand(0, 1),
-      );
-      $edit = array(
+      ];
+      $edit = [
         'uid[0][target_id]' => $user->getUsername(),
         'created[0][value][date]' => format_date($values[$langcode]['created'], 'custom', 'Y-m-d'),
         'created[0][value][time]' => format_date($values[$langcode]['created'], 'custom', 'H:i:s'),
         'sticky[value]' => $values[$langcode]['sticky'],
         'promote[value]' => $values[$langcode]['promote'],
-      );
-      $options = array('language' => $languages[$langcode]);
+      ];
+      $options = ['language' => $languages[$langcode]];
       $url = $entity->urlInfo('edit-form', $options);
       $this->drupalPostForm($url, $edit, $this->getFormSubmitAction($entity, $langcode), $options);
     }
@@ -232,11 +232,11 @@ protected function doTestAuthoringInfo() {
    */
   public function testTranslationLinkTheme() {
     $this->drupalLogin($this->administrator);
-    $article = $this->drupalCreateNode(array('type' => 'article', 'langcode' => $this->langcodes[0]));
+    $article = $this->drupalCreateNode(['type' => 'article', 'langcode' => $this->langcodes[0]]);
 
     // Set up Seven as the admin theme and use it for node editing.
-    $this->container->get('theme_handler')->install(array('seven'));
-    $edit = array();
+    $this->container->get('theme_handler')->install(['seven']);
+    $edit = [];
     $edit['admin_theme'] = 'seven';
     $edit['use_admin_theme'] = TRUE;
     $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
@@ -259,16 +259,16 @@ public function testTranslationLinkTheme() {
   public function testDisabledBundle() {
     // Create a bundle that does not have translation enabled.
     $disabledBundle = $this->randomMachineName();
-    $this->drupalCreateContentType(array('type' => $disabledBundle, 'name' => $disabledBundle));
+    $this->drupalCreateContentType(['type' => $disabledBundle, 'name' => $disabledBundle]);
 
     // Create a node for each bundle.
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'type' => $this->bundle,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
 
     // Make sure that nothing was inserted into the {content_translation} table.
-    $rows = db_query('SELECT nid, count(nid) AS count FROM {node_field_data} WHERE type <> :type GROUP BY nid HAVING count(nid) >= 2', array(':type' => $this->bundle))->fetchAll();
+    $rows = db_query('SELECT nid, count(nid) AS count FROM {node_field_data} WHERE type <> :type GROUP BY nid HAVING count(nid) >= 2', [':type' => $this->bundle])->fetchAll();
     $this->assertEqual(0, count($rows));
 
     // Ensure the translation tab is not accessible.
@@ -287,7 +287,7 @@ public function testTranslationRendering() {
     $node->setPromoted(TRUE);
 
     // Create translations.
-    foreach (array_diff($this->langcodes, array($default_langcode)) as $langcode) {
+    foreach (array_diff($this->langcodes, [$default_langcode]) as $langcode) {
       $values[$langcode] = $this->getNewEntityValues($langcode);
       $translation = $node->addTranslation($langcode, $values[$langcode]);
       // Publish and promote the translation to frontpage.
@@ -297,7 +297,7 @@ public function testTranslationRendering() {
     $node->save();
 
     // Test that the frontpage view displays the correct translations.
-    \Drupal::service('module_installer')->install(array('views'), TRUE);
+    \Drupal::service('module_installer')->install(['views'], TRUE);
     $this->rebuildContainer();
     $this->doTestTranslations('node', $values);
 
@@ -316,7 +316,7 @@ public function testTranslationRendering() {
     // See also assertTaxonomyPage() in NodeAccessBaseTableTest.
     $node_href = 'node/' . $node->id();
     foreach ($this->langcodes as $langcode) {
-      $this->drupalGet('node', array('language' => \Drupal::languageManager()->getLanguage($langcode)));
+      $this->drupalGet('node', ['language' => \Drupal::languageManager()->getLanguage($langcode)]);
       $num_match_found = 0;
       if ($langcode == 'en') {
         // Site default language does not have langcode prefix in the URL.
@@ -338,7 +338,7 @@ public function testTranslationRendering() {
     // language.
     $comment_form_href = 'node/' . $node->id() . '#comment-form';
     foreach ($this->langcodes as $langcode) {
-      $this->drupalGet('node', array('language' => \Drupal::languageManager()->getLanguage($langcode)));
+      $this->drupalGet('node', ['language' => \Drupal::languageManager()->getLanguage($langcode)]);
       $num_match_found = 0;
       if ($langcode == 'en') {
         // Site default language does not have langcode prefix in the URL.
@@ -374,8 +374,8 @@ public function testTranslationRendering() {
   protected function doTestTranslations($path, array $values) {
     $languages = $this->container->get('language_manager')->getLanguages();
     foreach ($this->langcodes as $langcode) {
-      $this->drupalGet($path, array('language' => $languages[$langcode]));
-      $this->assertText($values[$langcode]['title'][0]['value'], format_string('The %langcode node translation is correctly displayed.', array('%langcode' => $langcode)));
+      $this->drupalGet($path, ['language' => $languages[$langcode]]);
+      $this->assertText($values[$langcode]['title'][0]['value'], format_string('The %langcode node translation is correctly displayed.', ['%langcode' => $langcode]));
     }
   }
 
@@ -398,8 +398,8 @@ protected function doTestAlternateHreflangLinks(Url $url) {
       foreach ($urls as $alternate_langcode => $language_url) {
         // Retrieve desired link elements from the HTML head.
         $links = $this->xpath('head/link[@rel = "alternate" and @href = :href and @hreflang = :hreflang]',
-          array(':href' => $language_url->toString(), ':hreflang' => $alternate_langcode));
-        $this->assert(isset($links[0]), format_string('The %langcode node translation has the correct alternate hreflang link for %alternate_langcode: %link.', array('%langcode' => $langcode, '%alternate_langcode' => $alternate_langcode, '%link' => $url->toString())));
+          [':href' => $language_url->toString(), ':hreflang' => $alternate_langcode]);
+        $this->assert(isset($links[0]), format_string('The %langcode node translation has the correct alternate hreflang link for %alternate_langcode: %link.', ['%langcode' => $langcode, '%alternate_langcode' => $alternate_langcode, '%link' => $url->toString()]));
       }
     }
   }
@@ -446,15 +446,15 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
-        $title = t('<em>Edit @type</em> @title [%language translation]', array(
+        $title = t('<em>Edit @type</em> @title [%language translation]', [
           '@type' => $type_name,
           '@title' => $entity->getTranslation($langcode)->label(),
           '%language' => $languages[$langcode]->getName(),
-        ));
+        ]);
         $this->assertRaw($title);
       }
     }
diff --git a/core/modules/node/src/Tests/NodeTypeTest.php b/core/modules/node/src/Tests/NodeTypeTest.php
index 0d2d8deabf0b9e35923f56413e9993b159dd4a1b..bc4285276ca5212dd366f0c94485da404697d129 100644
--- a/core/modules/node/src/Tests/NodeTypeTest.php
+++ b/core/modules/node/src/Tests/NodeTypeTest.php
@@ -50,14 +50,14 @@ function testNodeTypeCreation() {
     $this->assertTrue($type_exists, 'The new content type has been created in the database.');
 
     // Log in a test user.
-    $web_user = $this->drupalCreateUser(array('create ' . $type->label() . ' content'));
+    $web_user = $this->drupalCreateUser(['create ' . $type->label() . ' content']);
     $this->drupalLogin($web_user);
 
     $this->drupalGet('node/add/' . $type->id());
     $this->assertResponse(200, 'The new content type can be accessed at node/add.');
 
     // Create a content type via the user interface.
-    $web_user = $this->drupalCreateUser(array('bypass node access', 'administer content types'));
+    $web_user = $this->drupalCreateUser(['bypass node access', 'administer content types']);
     $this->drupalLogin($web_user);
 
     $this->drupalGet('node/add');
@@ -66,11 +66,11 @@ function testNodeTypeCreation() {
     $elements = $this->cssSelect('dl.node-type-list dt');
     $this->assertEqual(3, count($elements));
 
-    $edit = array(
+    $edit = [
       'name' => 'foo',
       'title_label' => 'title for foo',
       'type' => 'foo',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/add', $edit, t('Save and manage fields'));
     $type_exists = (bool) NodeType::load('foo');
     $this->assertTrue($type_exists, 'The new content type has been created in the database.');
@@ -84,7 +84,7 @@ function testNodeTypeCreation() {
    * Tests editing a node type using the UI.
    */
   function testNodeTypeEditing() {
-    $web_user = $this->drupalCreateUser(array('bypass node access', 'administer content types', 'administer node fields'));
+    $web_user = $this->drupalCreateUser(['bypass node access', 'administer content types', 'administer node fields']);
     $this->drupalLogin($web_user);
 
     $field = FieldConfig::loadByName('node', 'page', 'body');
@@ -96,9 +96,9 @@ function testNodeTypeEditing() {
     $this->assertRaw('Body', 'Body field was found.');
 
     // Rename the title field.
-    $edit = array(
+    $edit = [
       'title_label' => 'Foo',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
 
     $this->drupalGet('node/add/page');
@@ -106,10 +106,10 @@ function testNodeTypeEditing() {
     $this->assertNoRaw('Title', 'Old title label was not displayed.');
 
     // Change the name and the description.
-    $edit = array(
+    $edit = [
       'name' => 'Bar',
       'description' => 'Lorem ipsum.',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
 
     $this->drupalGet('node/add');
@@ -131,9 +131,9 @@ function testNodeTypeEditing() {
     $this->assertEqual($node_bundles['page']['label'], 'NewBar', 'Node type bundle cache is updated');
 
     // Remove the body field.
-    $this->drupalPostForm('admin/structure/types/manage/page/fields/node.page.body/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/structure/types/manage/page/fields/node.page.body/delete', [], t('Delete'));
     // Resave the settings for this type.
-    $this->drupalPostForm('admin/structure/types/manage/page', array(), t('Save content type'));
+    $this->drupalPostForm('admin/structure/types/manage/page', [], t('Save content type'));
     // Check that the body field doesn't exist.
     $this->drupalGet('node/add/page');
     $this->assertNoRaw('Body', 'Body field was not found.');
@@ -147,18 +147,18 @@ function testNodeTypeDeletion() {
     $type = $this->drupalCreateContentType();
 
     // Log in a test user.
-    $web_user = $this->drupalCreateUser(array(
+    $web_user = $this->drupalCreateUser([
       'bypass node access',
       'administer content types',
-    ));
+    ]);
     $this->drupalLogin($web_user);
 
     // Add a new node of this type.
-    $node = $this->drupalCreateNode(array('type' => $type->id()));
+    $node = $this->drupalCreateNode(['type' => $type->id()]);
     // Attempt to delete the content type, which should not be allowed.
     $this->drupalGet('admin/structure/types/manage/' . $type->label() . '/delete');
     $this->assertRaw(
-      t('%type is used by 1 piece of content on your site. You can not remove this content type until you have removed all of the %type content.', array('%type' => $type->label())),
+      t('%type is used by 1 piece of content on your site. You can not remove this content type until you have removed all of the %type content.', ['%type' => $type->label()]),
       'The content type will not be deleted until all nodes of that type are removed.'
     );
     $this->assertNoText(t('This action cannot be undone.'), 'The node type deletion confirmation form is not available.');
@@ -168,13 +168,13 @@ function testNodeTypeDeletion() {
     // Attempt to delete the content type, which should now be allowed.
     $this->drupalGet('admin/structure/types/manage/' . $type->label() . '/delete');
     $this->assertRaw(
-      t('Are you sure you want to delete the content type %type?', array('%type' => $type->label())),
+      t('Are you sure you want to delete the content type %type?', ['%type' => $type->label()]),
       'The content type is available for deletion.'
     );
     $this->assertText(t('This action cannot be undone.'), 'The node type deletion confirmation form is available.');
 
     // Test that a locked node type could not be deleted.
-    $this->container->get('module_installer')->install(array('node_test_config'));
+    $this->container->get('module_installer')->install(['node_test_config']);
     // Lock the default node type.
     $locked = \Drupal::state()->get('node.type.locked');
     $locked['default'] = 'default';
@@ -186,14 +186,14 @@ function testNodeTypeDeletion() {
     $this->assertNoLink(t('Delete'));
     $this->drupalGet('admin/structure/types/manage/default/delete');
     $this->assertResponse(403);
-    $this->container->get('module_installer')->uninstall(array('node_test_config'));
+    $this->container->get('module_installer')->uninstall(['node_test_config']);
     $this->container = \Drupal::getContainer();
     unset($locked['default']);
     \Drupal::state()->set('node.type.locked', $locked);
     $this->drupalGet('admin/structure/types/manage/default');
     $this->clickLink(t('Delete'));
     $this->assertResponse(200);
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     $this->assertFalse((bool) NodeType::load('default'), 'Node type with machine default deleted.');
   }
 
@@ -202,7 +202,7 @@ function testNodeTypeDeletion() {
    */
   public function testNodeTypeFieldUiPermissions() {
     // Create an admin user who can only manage node fields.
-    $admin_user_1 = $this->drupalCreateUser(array('administer content types', 'administer node fields'));
+    $admin_user_1 = $this->drupalCreateUser(['administer content types', 'administer node fields']);
     $this->drupalLogin($admin_user_1);
 
     // Test that the user only sees the actions available to him.
@@ -211,7 +211,7 @@ public function testNodeTypeFieldUiPermissions() {
     $this->assertNoLinkByHref('admin/structure/types/manage/article/display');
 
     // Create another admin user who can manage node fields display.
-    $admin_user_2 = $this->drupalCreateUser(array('administer content types', 'administer node display'));
+    $admin_user_2 = $this->drupalCreateUser(['administer content types', 'administer node display']);
     $this->drupalLogin($admin_user_2);
 
     // Test that the user only sees the actions available to him.
diff --git a/core/modules/node/src/Tests/NodeViewTest.php b/core/modules/node/src/Tests/NodeViewTest.php
index 3a27ade0d9e2944c144ce36551a802bf81cb5f33..a01cb25a5742eca505c6a1c2756a881fa32cb554 100644
--- a/core/modules/node/src/Tests/NodeViewTest.php
+++ b/core/modules/node/src/Tests/NodeViewTest.php
@@ -89,7 +89,7 @@ public function testLinkHeader() {
   public function testMultiByteUtf8() {
     $title = '🐝';
     $this->assertTrue(mb_strlen($title, 'utf-8') < strlen($title), 'Title has multi-byte characters.');
-    $node = $this->drupalCreateNode(array('title' => $title));
+    $node = $this->drupalCreateNode(['title' => $title]);
     $this->drupalGet($node->urlInfo());
     $result = $this->xpath('//span[contains(@class, "field--name-title")]');
     $this->assertEqual((string) $result[0], $title, 'The passed title was returned.');
diff --git a/core/modules/node/src/Tests/PagePreviewTest.php b/core/modules/node/src/Tests/PagePreviewTest.php
index 086ae827090fa090841e195f125690a31f7ef8b9..aa4bcdb7aefabe83df9c75b50da61aea0d1b8285 100644
--- a/core/modules/node/src/Tests/PagePreviewTest.php
+++ b/core/modules/node/src/Tests/PagePreviewTest.php
@@ -29,7 +29,7 @@ class PagePreviewTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'taxonomy', 'comment', 'image', 'file', 'text', 'node_test', 'menu_ui');
+  public static $modules = ['node', 'taxonomy', 'comment', 'image', 'file', 'text', 'node_test', 'menu_ui'];
 
   /**
    * The name of the created field.
@@ -42,7 +42,7 @@ protected function setUp() {
     parent::setUp();
     $this->addDefaultCommentField('node', 'page');
 
-    $web_user = $this->drupalCreateUser(array('edit own page content', 'create page content', 'administer menu'));
+    $web_user = $this->drupalCreateUser(['edit own page content', 'create page content', 'administer menu']);
     $this->drupalLogin($web_user);
 
     // Add a vocabulary so we can test different view modes.
@@ -89,37 +89,37 @@ protected function setUp() {
 
     // Create a field.
     $this->fieldName = Unicode::strtolower($this->randomMachineName());
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'page', $this->fieldName, 'Tags', 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'page', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'entity_reference_autocomplete_tags',
-      ))
+      ])
       ->save();
 
     // Show on default display and teaser.
     entity_get_display('node', 'page', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
     entity_get_display('node', 'page', 'teaser')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
 
     entity_get_form_display('node', 'page', 'default')
-      ->setComponent('field_image', array(
+      ->setComponent('field_image', [
         'type' => 'image_image',
         'settings' => [],
-      ))
+      ])
       ->save();
 
     entity_get_display('node', 'page', 'default')
@@ -143,15 +143,15 @@ protected function setUp() {
     ])->save();
 
     entity_get_form_display('node', 'page', 'default')
-      ->setComponent('field_test_multi', array(
+      ->setComponent('field_test_multi', [
         'type' => 'text_textfield',
-      ))
+      ])
       ->save();
 
     entity_get_display('node', 'page', 'default')
-      ->setComponent('field_test_multi', array(
+      ->setComponent('field_test_multi', [
         'type' => 'string',
-      ))
+      ])
       ->save();
   }
 
@@ -164,7 +164,7 @@ function testPagePreview() {
     $term_key = $this->fieldName . '[target_id]';
 
     // Fill in node creation form and preview node.
-    $edit = array();
+    $edit = [];
     $edit[$title_key] = '<em>' . $this->randomMachineName(8) . '</em>';
     $edit[$body_key] = $this->randomMachineName(16);
     $edit[$term_key] = $this->term->getName();
@@ -178,7 +178,7 @@ function testPagePreview() {
     $this->drupalPostForm(NULL, ['field_image[0][alt]' => 'Picture of llamas'], t('Preview'));
 
     // Check that the preview is displaying the title, body and term.
-    $this->assertTitle(t('@title | Drupal', array('@title' => $edit[$title_key])), 'Basic page title is preview.');
+    $this->assertTitle(t('@title | Drupal', ['@title' => $edit[$title_key]]), 'Basic page title is preview.');
     $this->assertEscaped($edit[$title_key], 'Title displayed and escaped.');
     $this->assertText($edit[$body_key], 'Body displayed.');
     $this->assertText($edit[$term_key], 'Term displayed.');
@@ -195,7 +195,7 @@ function testPagePreview() {
       ->removeComponent('body')
       ->save();
 
-    $view_mode_edit = array('view_mode' => 'teaser');
+    $view_mode_edit = ['view_mode' => 'teaser'];
     $this->drupalPostForm('node/preview/' . $uuid . '/full', $view_mode_edit, t('Switch'));
     $this->assertRaw('view-mode-teaser', 'View mode teaser class found.');
     $this->assertNoText($edit[$body_key], 'Body not displayed.');
@@ -207,20 +207,20 @@ function testPagePreview() {
     $this->assertFieldByName($body_key, $edit[$body_key], 'Body field displayed.');
     $this->assertFieldByName($term_key, $edit[$term_key], 'Term field displayed.');
     $this->assertFieldByName('field_image[0][alt]', 'Picture of llamas');
-    $this->drupalPostAjaxForm(NULL, array(), array('field_test_multi_add_more' => t('Add another item')), NULL, array(), array(), 'node-page-form');
+    $this->drupalPostAjaxForm(NULL, [], ['field_test_multi_add_more' => t('Add another item')], NULL, [], [], 'node-page-form');
     $this->assertFieldByName('field_test_multi[0][value]');
     $this->assertFieldByName('field_test_multi[1][value]');
 
     // Return to page preview to check everything is as expected.
-    $this->drupalPostForm(NULL, array(), t('Preview'));
-    $this->assertTitle(t('@title | Drupal', array('@title' => $edit[$title_key])), 'Basic page title is preview.');
+    $this->drupalPostForm(NULL, [], t('Preview'));
+    $this->assertTitle(t('@title | Drupal', ['@title' => $edit[$title_key]]), 'Basic page title is preview.');
     $this->assertEscaped($edit[$title_key], 'Title displayed and escaped.');
     $this->assertText($edit[$body_key], 'Body displayed.');
     $this->assertText($edit[$term_key], 'Term displayed.');
     $this->assertLink(t('Back to content editing'));
 
     // Assert the content is kept when reloading the page.
-    $this->drupalGet('node/add/page', array('query' => array('uuid' => $uuid)));
+    $this->drupalGet('node/add/page', ['query' => ['uuid' => $uuid]]);
     $this->assertFieldByName($title_key, $edit[$title_key], 'Title field displayed.');
     $this->assertFieldByName($body_key, $edit[$body_key], 'Body field displayed.');
     $this->assertFieldByName($term_key, $edit[$term_key], 'Term field displayed.');
@@ -240,7 +240,7 @@ function testPagePreview() {
 
     // Check with two new terms on the edit form, additionally to the existing
     // one.
-    $edit = array();
+    $edit = [];
     $newterm1 = $this->randomMachineName(8);
     $newterm2 = $this->randomMachineName(8);
     $edit[$term_key] = $this->term->getName() . ', ' . $newterm1 . ', ' . $newterm2;
@@ -256,7 +256,7 @@ function testPagePreview() {
 
     // Check with one more new term, keeping old terms, removing the existing
     // one.
-    $edit = array();
+    $edit = [];
     $newterm3 = $this->randomMachineName(8);
     $edit[$term_key] = $newterm1 . ', ' . $newterm3 . ', ' . $newterm2;
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Preview'));
@@ -270,9 +270,9 @@ function testPagePreview() {
 
     // Check that editing an existing node after it has been previewed and not
     // saved doesn't remember the previous changes.
-    $edit = array(
+    $edit = [
       $title_key => $this->randomMachineName(8),
-    );
+    ];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Preview'));
     $this->assertText($edit[$title_key], 'New title displayed.');
     $this->clickLink(t('Back to content editing'));
@@ -289,7 +289,7 @@ function testPagePreview() {
     $node_type->save();
     $this->drupalGet('node/add/page');
     $this->assertNoRaw('edit-submit');
-    $this->drupalPostForm('node/add/page', array($title_key => 'Preview'), t('Preview'));
+    $this->drupalPostForm('node/add/page', [$title_key => 'Preview'], t('Preview'));
     $this->clickLink(t('Back to content editing'));
     $this->assertRaw('edit-submit');
 
@@ -348,8 +348,8 @@ function testPagePreview() {
     $this->assertText('Basic page ' . $title . ' has been created.');
     $node = $this->drupalGetNodeByTitle($title);
     $this->drupalGet('node/' . $node->id() . '/edit');
-    $this->drupalPostAjaxForm(NULL, [], array('field_test_multi_add_more' => t('Add another item')));
-    $this->drupalPostAjaxForm(NULL, [], array('field_test_multi_add_more' => t('Add another item')));
+    $this->drupalPostAjaxForm(NULL, [], ['field_test_multi_add_more' => t('Add another item')]);
+    $this->drupalPostAjaxForm(NULL, [], ['field_test_multi_add_more' => t('Add another item')]);
     $edit = [
       'field_test_multi[1][value]' => $example_text_2,
       'field_test_multi[2][value]' => $example_text_3,
@@ -404,7 +404,7 @@ function testPagePreviewWithRevisions() {
     $node_type->save();
 
     // Fill in node creation form and preview node.
-    $edit = array();
+    $edit = [];
     $edit[$title_key] = $this->randomMachineName(8);
     $edit[$body_key] = $this->randomMachineName(16);
     $edit[$term_key] = $this->term->id();
@@ -412,7 +412,7 @@ function testPagePreviewWithRevisions() {
     $this->drupalPostForm('node/add/page', $edit, t('Preview'));
 
     // Check that the preview is displaying the title, body and term.
-    $this->assertTitle(t('@title | Drupal', array('@title' => $edit[$title_key])), 'Basic page title is preview.');
+    $this->assertTitle(t('@title | Drupal', ['@title' => $edit[$title_key]]), 'Basic page title is preview.');
     $this->assertText($edit[$title_key], 'Title displayed.');
     $this->assertText($edit[$body_key], 'Body displayed.');
     $this->assertText($edit[$term_key], 'Term displayed.');
@@ -450,18 +450,18 @@ function testPagePreviewWithRevisions() {
    */
   public function testSimultaneousPreview() {
     $title_key = 'title[0][value]';
-    $node = $this->drupalCreateNode(array());
+    $node = $this->drupalCreateNode([]);
 
-    $edit = array($title_key => 'New page title');
+    $edit = [$title_key => 'New page title'];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Preview'));
     $this->assertText($edit[$title_key]);
 
-    $user2 = $this->drupalCreateUser(array('edit any page content'));
+    $user2 = $this->drupalCreateUser(['edit any page content']);
     $this->drupalLogin($user2);
     $this->drupalGet('node/' . $node->id() . '/edit');
     $this->assertFieldByName($title_key, $node->label(), 'No title leaked from previous user.');
 
-    $edit2 = array($title_key => 'Another page title');
+    $edit2 = [$title_key => 'Another page title'];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit2, t('Preview'));
     $this->assertUrl(\Drupal::url('entity.node.preview', ['node_preview' => $node->uuid(), 'view_mode_id' => 'full'], ['absolute' => TRUE]));
     $this->assertText($edit2[$title_key]);
diff --git a/core/modules/node/src/Tests/SummaryLengthTest.php b/core/modules/node/src/Tests/SummaryLengthTest.php
index 35eb0ddd44e38ef14428c3e2625648b35f526800..e953882e41bc85de44e93522c60be7717ff670b7 100644
--- a/core/modules/node/src/Tests/SummaryLengthTest.php
+++ b/core/modules/node/src/Tests/SummaryLengthTest.php
@@ -18,10 +18,10 @@ public function testSummaryLength() {
     $renderer = $this->container->get('renderer');
 
     // Create a node to view.
-    $settings = array(
-      'body' => array(array('value' => 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam vitae arcu at leo cursus laoreet. Curabitur dui tortor, adipiscing malesuada tempor in, bibendum ac diam. Cras non tellus a libero pellentesque condimentum. What is a Drupalism? Suspendisse ac lacus libero. Ut non est vel nisl faucibus interdum nec sed leo. Pellentesque sem risus, vulputate eu semper eget, auctor in libero. Ut fermentum est vitae metus convallis scelerisque. Phasellus pellentesque rhoncus tellus, eu dignissim purus posuere id. Quisque eu fringilla ligula. Morbi ullamcorper, lorem et mattis egestas, tortor neque pretium velit, eget eleifend odio turpis eu purus. Donec vitae metus quis leo pretium tincidunt a pulvinar sem. Morbi adipiscing laoreet mauris vel placerat. Nullam elementum, nisl sit amet scelerisque malesuada, dolor nunc hendrerit quam, eu ultrices erat est in orci. Curabitur feugiat egestas nisl sed accumsan.')),
+    $settings = [
+      'body' => [['value' => 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam vitae arcu at leo cursus laoreet. Curabitur dui tortor, adipiscing malesuada tempor in, bibendum ac diam. Cras non tellus a libero pellentesque condimentum. What is a Drupalism? Suspendisse ac lacus libero. Ut non est vel nisl faucibus interdum nec sed leo. Pellentesque sem risus, vulputate eu semper eget, auctor in libero. Ut fermentum est vitae metus convallis scelerisque. Phasellus pellentesque rhoncus tellus, eu dignissim purus posuere id. Quisque eu fringilla ligula. Morbi ullamcorper, lorem et mattis egestas, tortor neque pretium velit, eget eleifend odio turpis eu purus. Donec vitae metus quis leo pretium tincidunt a pulvinar sem. Morbi adipiscing laoreet mauris vel placerat. Nullam elementum, nisl sit amet scelerisque malesuada, dolor nunc hendrerit quam, eu ultrices erat est in orci. Curabitur feugiat egestas nisl sed accumsan.']],
       'promote' => 1,
-    );
+    ];
     $node = $this->drupalCreateNode($settings);
     $this->assertTrue(Node::load($node->id()), 'Node created.');
 
diff --git a/core/modules/node/src/Tests/Views/BulkFormAccessTest.php b/core/modules/node/src/Tests/Views/BulkFormAccessTest.php
index 6dada72cf744f82dae15c270c24b90e7e22c81c9..938e456ce55ef8f3e0255443234b68b86e804b8e 100644
--- a/core/modules/node/src/Tests/Views/BulkFormAccessTest.php
+++ b/core/modules/node/src/Tests/Views/BulkFormAccessTest.php
@@ -22,14 +22,14 @@ class BulkFormAccessTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_test_views', 'node_access_test');
+  public static $modules = ['node_test_views', 'node_access_test'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_node_bulk_form');
+  public static $testViews = ['test_node_bulk_form'];
 
   /**
    * The node access control handler.
@@ -45,7 +45,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create Article node type.
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
 
     $this->accessHandler = \Drupal::entityManager()->getAccessControlHandler('node');
 
@@ -65,15 +65,15 @@ public function testNodeEditAccess() {
     // Create an account who will be the author of a private node.
     $author = $this->drupalCreateUser();
     // Create a private node (author may view, edit and delete, others may not).
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'type' => 'article',
-      'private' => array(array(
+      'private' => [[
         'value' => TRUE,
-      )),
+      ]],
       'uid' => $author->id(),
-    ));
+    ]);
     // Create an account that may view the private node, but not edit it.
-    $account = $this->drupalCreateUser(array('node test view'));
+    $account = $this->drupalCreateUser(['node test view']);
     $this->drupalLogin($account);
 
     // Ensure the node is published.
@@ -83,10 +83,10 @@ public function testNodeEditAccess() {
     $this->assertEqual(FALSE, $this->accessHandler->access($node, 'update', $account), 'The node may not be edited.');
 
     // Test editing the node using the bulk form.
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'action' => 'node_unpublish_action',
-    );
+    ];
     $this->drupalPostForm('test-node-bulk-form', $edit, t('Apply to selected items'));
     $this->assertRaw(SafeMarkup::format('No access to execute %action on the @entity_type_label %entity_label.', [
       '%action' => 'Unpublish content',
@@ -100,7 +100,7 @@ public function testNodeEditAccess() {
 
     // Create an account that may view the private node, but can update the
     // status.
-    $account = $this->drupalCreateUser(array('administer nodes', 'node test view'));
+    $account = $this->drupalCreateUser(['administer nodes', 'node test view']);
     $this->drupalLogin($account);
 
     // Ensure the node is published.
@@ -111,10 +111,10 @@ public function testNodeEditAccess() {
     $this->assertEqual(TRUE, $node->status->access('edit', $account), 'The node status can be edited.');
 
     // Test editing the node using the bulk form.
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'action' => 'node_unpublish_action',
-    );
+    ];
     $this->drupalPostForm('test-node-bulk-form', $edit, t('Apply to selected items'));
     // Test that the action message isn't shown.
     $this->assertNoRaw(SafeMarkup::format('%action was applied to 1 item.', [
@@ -132,25 +132,25 @@ public function testNodeDeleteAccess() {
     // Create an account who will be the author of a private node.
     $author = $this->drupalCreateUser();
     // Create a private node (author may view, edit and delete, others may not).
-    $private_node = $this->drupalCreateNode(array(
+    $private_node = $this->drupalCreateNode([
       'type' => 'article',
-      'private' => array(array(
+      'private' => [[
         'value' => TRUE,
-      )),
+      ]],
       'uid' => $author->id(),
-    ));
+    ]);
     // Create an account that may view the private node, but not delete it.
-    $account = $this->drupalCreateUser(array('access content', 'administer nodes', 'delete own article content', 'node test view'));
+    $account = $this->drupalCreateUser(['access content', 'administer nodes', 'delete own article content', 'node test view']);
     // Create a node that may be deleted too, to ensure the delete confirmation
     // page is shown later. In node_access_test.module, nodes may only be
     // deleted by the author.
-    $own_node = $this->drupalCreateNode(array(
+    $own_node = $this->drupalCreateNode([
       'type' => 'article',
-      'private' => array(array(
+      'private' => [[
         'value' => TRUE,
-      )),
+      ]],
       'uid' => $account->id(),
-    ));
+    ]);
     $this->drupalLogin($account);
 
     // Ensure that the private node can not be deleted.
@@ -159,13 +159,13 @@ public function testNodeDeleteAccess() {
     $this->assertEqual(TRUE, $this->accessHandler->access($own_node, 'delete', $account), 'The own node may be deleted.');
 
     // Try to delete the node using the bulk form.
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'node_bulk_form[1]' => TRUE,
       'action' => 'node_delete_action',
-    );
+    ];
     $this->drupalPostForm('test-node-bulk-form', $edit, t('Apply to selected items'));
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     // Ensure the private node still exists.
     $private_node = Node::load($private_node->id());
     $this->assertNotNull($private_node, 'The private node has not been deleted.');
diff --git a/core/modules/node/src/Tests/Views/BulkFormTest.php b/core/modules/node/src/Tests/Views/BulkFormTest.php
index 677c9d83a1b65107905676819a06ba5bfd2d033f..2e7b6ff4281ef1286be63894476508be40996c08 100644
--- a/core/modules/node/src/Tests/Views/BulkFormTest.php
+++ b/core/modules/node/src/Tests/Views/BulkFormTest.php
@@ -19,14 +19,14 @@ class BulkFormTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_test_views', 'language');
+  public static $modules = ['node_test_views', 'language'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_node_bulk_form');
+  public static $testViews = ['test_node_bulk_form'];
 
   /**
    * The test nodes.
@@ -86,7 +86,7 @@ protected function setUp($import_test_views = TRUE) {
     $this->assertEqual(count($view->result), 10, 'All created translations are selected.');
 
     // Check the operations are accessible to the logged in user.
-    $this->drupalLogin($this->drupalCreateUser(array('administer nodes', 'access content overview', 'bypass node access')));
+    $this->drupalLogin($this->drupalCreateUser(['administer nodes', 'access content overview', 'bypass node access']));
     $this->drupalGet('test-node-bulk-form');
     $elements = $this->xpath('//select[@id="edit-action"]//option');
     $this->assertIdentical(count($elements), 8, 'All node operations are found.');
@@ -101,10 +101,10 @@ public function testBulkForm() {
     $this->assertTrue($node->isPublished(), 'Node is initially published');
     $this->assertTrue($node->getTranslation('en-gb')->isPublished(), 'Node translation is published');
     $this->assertTrue($node->getTranslation('it')->isPublished(), 'Node translation is published');
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'action' => 'node_unpublish_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     $node = $this->loadNode($node->id());
     $this->assertFalse($node->isPublished(), 'Node has been unpublished');
@@ -112,10 +112,10 @@ public function testBulkForm() {
     $this->assertTrue($node->getTranslation('it')->isPublished(), 'Node translation has not been unpublished');
 
     // Publish action.
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'action' => 'node_publish_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     $node = $this->loadNode($node->id());
     $this->assertTrue($node->isPublished(), 'Node has been published again');
@@ -124,10 +124,10 @@ public function testBulkForm() {
     $this->assertFalse($node->isSticky(), 'Node is not sticky');
     $this->assertFalse($node->getTranslation('en-gb')->isSticky(), 'Node translation is not sticky');
     $this->assertFalse($node->getTranslation('it')->isSticky(), 'Node translation is not sticky');
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'action' => 'node_make_sticky_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     $node = $this->loadNode($node->id());
     $this->assertTrue($node->isSticky(), 'Node has been made sticky');
@@ -135,10 +135,10 @@ public function testBulkForm() {
     $this->assertFalse($node->getTranslation('it')->isSticky(), 'Node translation has not been made sticky');
 
     // Make unsticky action.
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'action' => 'node_make_unsticky_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     $node = $this->loadNode($node->id());
     $this->assertFalse($node->isSticky(), 'Node is not sticky anymore');
@@ -147,10 +147,10 @@ public function testBulkForm() {
     $this->assertFalse($node->isPromoted(), 'Node is not promoted to the front page');
     $this->assertFalse($node->getTranslation('en-gb')->isPromoted(), 'Node translation is not promoted to the front page');
     $this->assertFalse($node->getTranslation('it')->isPromoted(), 'Node translation is not promoted to the front page');
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'action' => 'node_promote_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     $node = $this->loadNode($node->id());
     $this->assertTrue($node->isPromoted(), 'Node has been promoted to the front page');
@@ -158,17 +158,17 @@ public function testBulkForm() {
     $this->assertFalse($node->getTranslation('it')->isPromoted(), 'Node translation has not been promoted to the front page');
 
     // Demote from front page.
-    $edit = array(
+    $edit = [
       'node_bulk_form[0]' => TRUE,
       'action' => 'node_unpromote_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     $node = $this->loadNode($node->id());
     $this->assertFalse($node->isPromoted(), 'Node has been demoted');
 
     // Select a bunch of translated and untranslated nodes and check that
     // operations are always applied to individual translations.
-    $edit = array(
+    $edit = [
       // Original and all translations.
       'node_bulk_form[0]' => TRUE, // Node 1, English, original.
       'node_bulk_form[1]' => TRUE, // Node 1, British English.
@@ -184,7 +184,7 @@ public function testBulkForm() {
       'node_bulk_form[8]' => TRUE, // Node 4, English, untranslated.
       'node_bulk_form[9]' => FALSE, // Node 5, British English, untranslated.
       'action' => 'node_unpublish_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     $node = $this->loadNode(1);
     $this->assertFalse($node->getTranslation('en')->isPublished(), '1: English translation has been unpublished');
@@ -209,7 +209,7 @@ public function testBulkForm() {
   public function testBulkDeletion() {
     // Select a bunch of translated and untranslated nodes and check that
     // nodes and individual translations are properly deleted.
-    $edit = array(
+    $edit = [
       // Original and all translations.
       'node_bulk_form[0]' => TRUE, // Node 1, English, original.
       'node_bulk_form[1]' => TRUE, // Node 1, British English.
@@ -225,7 +225,7 @@ public function testBulkDeletion() {
       'node_bulk_form[8]' => TRUE, // Node 4, English, untranslated.
       'node_bulk_form[9]' => FALSE, // Node 5, British English, untranslated.
       'action' => 'node_delete_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
 
     $label = $this->loadNode(1)->label();
@@ -239,7 +239,7 @@ public function testBulkDeletion() {
     $this->assertText($label);
     $this->assertNoText("$label (Original translation) - The following content translations will be deleted:");
 
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
 
     $node = $this->loadNode(1);
     $this->assertNull($node, '1: Node has been deleted');
diff --git a/core/modules/node/src/Tests/Views/FilterUidRevisionTest.php b/core/modules/node/src/Tests/Views/FilterUidRevisionTest.php
index 017d5eb39695988c55463cc0d88ffa454281bf60..18273003ae939f97b692b3b462270e7d273ac7ce 100644
--- a/core/modules/node/src/Tests/Views/FilterUidRevisionTest.php
+++ b/core/modules/node/src/Tests/Views/FilterUidRevisionTest.php
@@ -16,7 +16,7 @@ class FilterUidRevisionTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_filter_node_uid_revision');
+  public static $testViews = ['test_filter_node_uid_revision'];
 
   /**
    * Tests the node_uid_revision filter.
@@ -25,14 +25,14 @@ public function testFilter() {
     $author = $this->drupalCreateUser();
     $no_author = $this->drupalCreateUser();
 
-    $expected_result = array();
+    $expected_result = [];
     // Create one node, with the author as the node author.
-    $node = $this->drupalCreateNode(array('uid' => $author->id()));
-    $expected_result[] = array('nid' => $node->id());
+    $node = $this->drupalCreateNode(['uid' => $author->id()]);
+    $expected_result[] = ['nid' => $node->id()];
     // Create one node of which an additional revision author will be the
     // author.
-    $node = $this->drupalCreateNode(array('revision_uid' => $no_author->id()));
-    $expected_result[] = array('nid' => $node->id());
+    $node = $this->drupalCreateNode(['revision_uid' => $no_author->id()]);
+    $expected_result[] = ['nid' => $node->id()];
     $revision = clone $node;
     // Force to add a new revision.
     $revision->set('vid', NULL);
@@ -41,14 +41,14 @@ public function testFilter() {
 
     // Create one  node on which the author has neither authorship of revisions
     // or the main node.
-    $this->drupalCreateNode(array('uid' => $no_author->id()));
+    $this->drupalCreateNode(['uid' => $no_author->id()]);
 
     $view = Views::getView('test_filter_node_uid_revision');
     $view->initHandlers();
-    $view->filter['uid_revision']->value = array($author->id());
+    $view->filter['uid_revision']->value = [$author->id()];
 
     $this->executeView($view);
-    $this->assertIdenticalResultset($view, $expected_result, array('nid' => 'nid'), 'Make sure that the view only returns nodes which match either the node or the revision author.');
+    $this->assertIdenticalResultset($view, $expected_result, ['nid' => 'nid'], 'Make sure that the view only returns nodes which match either the node or the revision author.');
   }
 
 }
diff --git a/core/modules/node/src/Tests/Views/FrontPageTest.php b/core/modules/node/src/Tests/Views/FrontPageTest.php
index 19cb659da24af7ae15575d65dffad1ad66babe90..1c6003a740ccbcf07bd1961a22e53efeea79e0b1 100644
--- a/core/modules/node/src/Tests/Views/FrontPageTest.php
+++ b/core/modules/node/src/Tests/Views/FrontPageTest.php
@@ -37,7 +37,7 @@ class FrontPageTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'contextual');
+  public static $modules = ['node', 'contextual'];
 
   protected function setUp() {
     parent::setUp();
@@ -74,14 +74,14 @@ public function testFrontPage() {
     $this->executeView($view);
     $view->preview();
 
-    $this->assertEqual($view->getTitle(), format_string('Welcome to @site_name', array('@site_name' => $site_name)), 'The welcome title is used for the empty view.');
+    $this->assertEqual($view->getTitle(), format_string('Welcome to @site_name', ['@site_name' => $site_name]), 'The welcome title is used for the empty view.');
     $view->destroy();
 
     // Create some nodes on the frontpage view. Add more than 10 nodes in order
     // to enable paging.
-    $expected = array();
+    $expected = [];
     for ($i = 0; $i < 20; $i++) {
-      $values = array();
+      $values = [];
       $values['type'] = 'article';
       $values['title'] = $this->randomMachineName();
       $values['promote'] = TRUE;
@@ -94,21 +94,21 @@ public function testFrontPage() {
         $node = $this->nodeStorage->create($values);
         $node->save();
         // Put the sticky on at the front.
-        array_unshift($expected, array('nid' => $node->id()));
+        array_unshift($expected, ['nid' => $node->id()]);
       }
       else {
         $values['sticky'] = FALSE;
         $node = $this->nodeStorage->create($values);
         $node->save();
-        array_push($expected, array('nid' => $node->id()));
+        array_push($expected, ['nid' => $node->id()]);
       }
     }
 
     // Create some nodes which aren't on the frontpage, either because they
     // aren't promoted or because they aren't published.
-    $not_expected_nids = array();
+    $not_expected_nids = [];
 
-    $values = array();
+    $values = [];
     $values['type'] = 'article';
     $values['title'] = $this->randomMachineName();
     $values['status'] = TRUE;
@@ -132,7 +132,7 @@ public function testFrontPage() {
     $node->save();
     $not_expected_nids[] = $node->id();
 
-    $column_map = array('nid' => 'nid');
+    $column_map = ['nid' => 'nid'];
 
     $view->setDisplay('page_1');
     $this->executeView($view);
@@ -171,7 +171,7 @@ protected function assertNotInResultSet(ViewExecutable $view, array $not_expecte
   public function testAdminFrontPage() {
     // When a user with sufficient permissions is logged in, views_ui adds
     // contextual links to the homepage view. This verifies there are no errors.
-    \Drupal::service('module_installer')->install(array('views_ui'));
+    \Drupal::service('module_installer')->install(['views_ui']);
     // Log in root user with sufficient permissions.
     $this->drupalLogin($this->rootUser);
     // Test frontpage view.
diff --git a/core/modules/node/src/Tests/Views/NodeContextualLinksTest.php b/core/modules/node/src/Tests/Views/NodeContextualLinksTest.php
index acd7d7b91a318ad24362dff022f482940afb3791..dc23d0ce55f297cda9b74b77908c0e3034687d1b 100644
--- a/core/modules/node/src/Tests/Views/NodeContextualLinksTest.php
+++ b/core/modules/node/src/Tests/Views/NodeContextualLinksTest.php
@@ -17,27 +17,27 @@ class NodeContextualLinksTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('contextual');
+  public static $modules = ['contextual'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_contextual_links');
+  public static $testViews = ['test_contextual_links'];
 
   /**
    * Tests contextual links.
    */
   public function testNodeContextualLinks() {
-    $this->drupalCreateContentType(array('type' => 'page'));
-    $this->drupalCreateNode(array('promote' => 1));
+    $this->drupalCreateContentType(['type' => 'page']);
+    $this->drupalCreateNode(['promote' => 1]);
     $this->drupalGet('node');
 
-    $user = $this->drupalCreateUser(array('administer nodes', 'access contextual links'));
+    $user = $this->drupalCreateUser(['administer nodes', 'access contextual links']);
     $this->drupalLogin($user);
 
-    $response = $this->renderContextualLinks(array('node:node=1:'), 'node');
+    $response = $this->renderContextualLinks(['node:node=1:'], 'node');
     $this->assertResponse(200);
     $json = Json::decode($response);
     $this->setRawContent($json['node:node=1:']);
@@ -63,7 +63,7 @@ public function testNodeContextualLinks() {
    */
   protected function renderContextualLinks($ids, $current_path) {
     // Build POST values.
-    $post = array();
+    $post = [];
     for ($i = 0; $i < count($ids); $i++) {
       $post['ids[' . $i . ']'] = $ids[$i];
     }
@@ -78,15 +78,15 @@ protected function renderContextualLinks($ids, $current_path) {
     $post = implode('&', $post);
 
     // Perform HTTP request.
-    return $this->curlExec(array(
-      CURLOPT_URL => \Drupal::url('contextual.render', [], ['absolute' => TRUE, 'query' => array('destination' => $current_path)]),
+    return $this->curlExec([
+      CURLOPT_URL => \Drupal::url('contextual.render', [], ['absolute' => TRUE, 'query' => ['destination' => $current_path]]),
       CURLOPT_POST => TRUE,
       CURLOPT_POSTFIELDS => $post,
-      CURLOPT_HTTPHEADER => array(
+      CURLOPT_HTTPHEADER => [
         'Accept: application/json',
         'Content-Type: application/x-www-form-urlencoded',
-      ),
-    ));
+      ],
+    ]);
   }
 
   /**
@@ -108,8 +108,8 @@ public function testPageWithDisabledContextualModule() {
     $admin_user->pass_raw = 'new_password';
     $admin_user->save();
 
-    $this->drupalCreateContentType(array('type' => 'page'));
-    $this->drupalCreateNode(array('promote' => 1));
+    $this->drupalCreateContentType(['type' => 'page']);
+    $this->drupalCreateNode(['promote' => 1]);
 
     $this->drupalLogin($admin_user);
     $this->drupalGet('node');
diff --git a/core/modules/node/src/Tests/Views/NodeFieldFilterTest.php b/core/modules/node/src/Tests/Views/NodeFieldFilterTest.php
index 6b6d5e246efeaa387f1008504329fc0fe499a5d2..048c7a905ee466e5da5a7994eb17eebb31ee7962 100644
--- a/core/modules/node/src/Tests/Views/NodeFieldFilterTest.php
+++ b/core/modules/node/src/Tests/Views/NodeFieldFilterTest.php
@@ -14,14 +14,14 @@ class NodeFieldFilterTest extends NodeTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_field_filters');
+  public static $testViews = ['test_field_filters'];
 
   /**
    * List of node titles by language.
@@ -35,7 +35,7 @@ function setUp() {
 
     // Create Page content type.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
     }
 
     // Add two new languages.
@@ -43,15 +43,15 @@ function setUp() {
     ConfigurableLanguage::createFromLangcode('es')->save();
 
     // Set up node titles.
-    $this->nodeTitles = array(
+    $this->nodeTitles = [
       'en' => 'Food in Paris',
       'es' => 'Comida en Paris',
       'fr' => 'Nouriture en Paris',
-    );
+    ];
 
     // Create node with translations.
     $node = $this->drupalCreateNode(['title' => $this->nodeTitles['en'], 'langcode' => 'en', 'type' => 'page', 'body' => [['value' => $this->nodeTitles['en']]]]);
-    foreach (array('es', 'fr') as $langcode) {
+    foreach (['es', 'fr'] as $langcode) {
       $translation = $node->addTranslation($langcode, ['title' => $this->nodeTitles[$langcode]]);
       $translation->body->value = $this->nodeTitles[$langcode];
     }
@@ -64,19 +64,19 @@ function setUp() {
   public function testFilters() {
     // Test the title filter page, which filters for title contains 'Comida'.
     // Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-title-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida title filter');
+    $this->assertPageCounts('test-title-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida title filter');
 
     // Test the body filter page, which filters for body contains 'Comida'.
     // Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-body-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida body filter');
+    $this->assertPageCounts('test-body-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida body filter');
 
     // Test the title Paris filter page, which filters for title contains
     // 'Paris'. Should show each translation once.
-    $this->assertPageCounts('test-title-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris title filter');
+    $this->assertPageCounts('test-title-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris title filter');
 
     // Test the body Paris filter page, which filters for body contains
     // 'Paris'. Should show each translation once.
-    $this->assertPageCounts('test-body-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris body filter');
+    $this->assertPageCounts('test-body-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris body filter');
   }
 
   /**
diff --git a/core/modules/node/src/Tests/Views/NodeFieldTokensTest.php b/core/modules/node/src/Tests/Views/NodeFieldTokensTest.php
index 9c124467a23a34d703b79f1e50c36f7c34a2268d..a5b1910130d692f7169c8f0096ff423ef48a60a7 100644
--- a/core/modules/node/src/Tests/Views/NodeFieldTokensTest.php
+++ b/core/modules/node/src/Tests/Views/NodeFieldTokensTest.php
@@ -17,7 +17,7 @@ class NodeFieldTokensTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_node_tokens');
+  public static $testViews = ['test_node_tokens'];
 
   /**
    * Tests token replacement for Views tokens supplied by the Node module.
diff --git a/core/modules/node/src/Tests/Views/NodeIntegrationTest.php b/core/modules/node/src/Tests/Views/NodeIntegrationTest.php
index 26909af8408b17c7dcb8c2b08c60f7c7e2aaca2f..c6791381996a22c17c5f0c6f589c2917a180ab7c 100644
--- a/core/modules/node/src/Tests/Views/NodeIntegrationTest.php
+++ b/core/modules/node/src/Tests/Views/NodeIntegrationTest.php
@@ -14,22 +14,22 @@ class NodeIntegrationTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_node_view');
+  public static $testViews = ['test_node_view'];
 
   /**
    * Tests basic node view with a node type argument.
    */
   public function testNodeViewTypeArgument() {
     // Create two content types with three nodes each.
-    $types = array();
-    $all_nids = array();
+    $types = [];
+    $all_nids = [];
     for ($i = 0; $i < 2; $i++) {
       $type = $this->drupalCreateContentType(['name' => '<em>' . $this->randomMachineName() . '</em>']);
       $types[] = $type;
 
       for ($j = 0; $j < 5; $j++) {
         // Ensure the right order of the nodes.
-        $node = $this->drupalCreateNode(array('type' => $type->id(), 'created' => REQUEST_TIME - ($i * 5 + $j)));
+        $node = $this->drupalCreateNode(['type' => $type->id(), 'created' => REQUEST_TIME - ($i * 5 + $j)]);
         $nodes[$type->id()][$node->id()] = $node;
         $all_nids[] = $node->id();
       }
@@ -55,9 +55,9 @@ public function testNodeViewTypeArgument() {
    * @param array $expected_nids
    *   An array of node IDs.
    */
-  protected function assertNids(array $expected_nids = array()) {
+  protected function assertNids(array $expected_nids = []) {
     $result = $this->xpath('//span[@class="field-content"]');
-    $nids = array();
+    $nids = [];
     foreach ($result as $element) {
       $nids[] = (int) $element;
     }
diff --git a/core/modules/node/src/Tests/Views/NodeLanguageTest.php b/core/modules/node/src/Tests/Views/NodeLanguageTest.php
index 4561508e57f03a5a6bba7a7dd5617516cae971f1..bdd26c0caf6610518af0d0f73da76f8de031a127 100644
--- a/core/modules/node/src/Tests/Views/NodeLanguageTest.php
+++ b/core/modules/node/src/Tests/Views/NodeLanguageTest.php
@@ -19,14 +19,14 @@ class NodeLanguageTest extends NodeTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language', 'node_test_views');
+  public static $modules = ['language', 'node_test_views'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_language');
+  public static $testViews = ['test_language'];
 
   /**
    * List of node titles by language.
@@ -43,8 +43,8 @@ protected function setUp() {
 
     // Create Page content type.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-      ViewTestData::createTestViews(get_class($this), array('node_test_views'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+      ViewTestData::createTestViews(get_class($this), ['node_test_views']);
     }
 
     // Add two new languages.
@@ -60,30 +60,30 @@ protected function setUp() {
     // Set up node titles. They should not include the words "French",
     // "English", or "Spanish", as there is a language field in the view
     // that prints out those words.
-    $this->nodeTitles = array(
-      LanguageInterface::LANGCODE_NOT_SPECIFIED => array(
+    $this->nodeTitles = [
+      LanguageInterface::LANGCODE_NOT_SPECIFIED => [
         'First node und',
-      ),
-      'es' => array(
+      ],
+      'es' => [
         'Primero nodo es',
         'Segundo nodo es',
         'Tercera nodo es',
-      ),
-      'en' => array(
+      ],
+      'en' => [
         'First node en',
         'Second node en',
-      ),
-      'fr' => array(
+      ],
+      'fr' => [
         'Premier nœud fr',
-      )
-    );
+      ]
+    ];
 
     // Create nodes with translations.
     foreach ($this->nodeTitles['es'] as $index => $title) {
-      $node = $this->drupalCreateNode(array('title' => $title, 'langcode' => 'es', 'type' => 'page', 'promote' => 1));
-      foreach (array('en', 'fr') as $langcode) {
+      $node = $this->drupalCreateNode(['title' => $title, 'langcode' => 'es', 'type' => 'page', 'promote' => 1]);
+      foreach (['en', 'fr'] as $langcode) {
         if (isset($this->nodeTitles[$langcode][$index])) {
-          $translation = $node->addTranslation($langcode, array('title' => $this->nodeTitles[$langcode][$index]));
+          $translation = $node->addTranslation($langcode, ['title' => $this->nodeTitles[$langcode][$index]]);
           $translation->body->value = $this->randomMachineName(32);
         }
       }
@@ -91,14 +91,14 @@ protected function setUp() {
     }
     // Create non-translatable nodes.
     foreach ($this->nodeTitles[LanguageInterface::LANGCODE_NOT_SPECIFIED] as $index => $title) {
-      $node = $this->drupalCreateNode(array('title' => $title, 'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED, 'type' => 'page', 'promote' => 1));
+      $node = $this->drupalCreateNode(['title' => $title, 'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED, 'type' => 'page', 'promote' => 1]);
       $node->body->value = $this->randomMachineName(32);
       $node->save();
     }
 
     $this->container->get('router.builder')->rebuild();
 
-    $user = $this->drupalCreateUser(array('access content overview', 'access content'));
+    $user = $this->drupalCreateUser(['access content overview', 'access content']);
     $this->drupalLogin($user);
   }
 
@@ -178,7 +178,7 @@ public function testLanguages() {
     }
     // When filtered, only the specific languages should show.
     foreach ($this->nodeTitles as $langcode => $titles) {
-      $this->drupalGet('admin/content', array('query' => array('langcode' => $langcode)));
+      $this->drupalGet('admin/content', ['query' => ['langcode' => $langcode]]);
       foreach ($titles as $title) {
         $this->assertText($title);
       }
@@ -195,7 +195,7 @@ public function testLanguages() {
     // filter is set to the site default language instead. This should just
     // show the English nodes, no matter what the content language is.
     $config = $this->config('views.view.frontpage');
-    $config->set('display.default.display_options.filters.langcode.value', array(PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT => PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT));
+    $config->set('display.default.display_options.filters.langcode.value', [PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT => PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT]);
     $config->save();
     foreach ($this->nodeTitles as $langcode => $titles) {
       if ($langcode == LanguageInterface::LANGCODE_NOT_SPECIFIED) {
@@ -219,10 +219,10 @@ public function testLanguages() {
     //
     // IMPORTANT: Make sure this part of the test is last -- it is changing
     // language configuration!
-    $config->set('display.default.display_options.filters.langcode.value', array('***LANGUAGE_language_interface***' => '***LANGUAGE_language_interface***'));
+    $config->set('display.default.display_options.filters.langcode.value', ['***LANGUAGE_language_interface***' => '***LANGUAGE_language_interface***']);
     $config->save();
     $language_config = $this->config('language.types');
-    $language_config->set('negotiation.language_interface.enabled', array('language-selected' => 1));
+    $language_config->set('negotiation.language_interface.enabled', ['language-selected' => 1]);
     $language_config->save();
     $language_config = $this->config('language.negotiation');
     $language_config->set('selected_langcode', 'es');
diff --git a/core/modules/node/src/Tests/Views/NodeRevisionWizardTest.php b/core/modules/node/src/Tests/Views/NodeRevisionWizardTest.php
index 109cdc4dd28f7750498665326d53025daee0338c..6a774f33f72c123af1d4d556cccd3f67067fc0cb 100644
--- a/core/modules/node/src/Tests/Views/NodeRevisionWizardTest.php
+++ b/core/modules/node/src/Tests/Views/NodeRevisionWizardTest.php
@@ -17,11 +17,11 @@ class NodeRevisionWizardTest extends WizardTestBase {
    * Tests creating a node revision view.
    */
   public function testViewAdd() {
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
     // Create two nodes with two revision.
     $node_storage = \Drupal::entityManager()->getStorage('node');
     /** @var \Drupal\node\NodeInterface $node */
-    $node = $node_storage->create(array('title' => $this->randomString(), 'type' => 'article', 'created' => REQUEST_TIME + 40));
+    $node = $node_storage->create(['title' => $this->randomString(), 'type' => 'article', 'created' => REQUEST_TIME + 40]);
     $node->save();
 
     $node = $node->createDuplicate();
@@ -29,7 +29,7 @@ public function testViewAdd() {
     $node->created->value = REQUEST_TIME + 20;
     $node->save();
 
-    $node = $node_storage->create(array('title' => $this->randomString(), 'type' => 'article', 'created' => REQUEST_TIME + 30));
+    $node = $node_storage->create(['title' => $this->randomString(), 'type' => 'article', 'created' => REQUEST_TIME + 30]);
     $node->save();
 
     $node = $node->createDuplicate();
@@ -37,7 +37,7 @@ public function testViewAdd() {
     $node->created->value = REQUEST_TIME + 10;
     $node->save();
 
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['description'] = $this->randomMachineName(16);
@@ -54,8 +54,8 @@ public function testViewAdd() {
     $executable = Views::executableFactory()->get($view);
     $this->executeView($executable);
 
-    $this->assertIdenticalResultset($executable, array(array('vid' => 1), array('vid' => 3), array('vid' => 2), array('vid' => 4)),
-      array('vid' => 'vid'));
+    $this->assertIdenticalResultset($executable, [['vid' => 1], ['vid' => 3], ['vid' => 2], ['vid' => 4]],
+      ['vid' => 'vid']);
   }
 
 }
diff --git a/core/modules/node/src/Tests/Views/NodeTestBase.php b/core/modules/node/src/Tests/Views/NodeTestBase.php
index 6701b417d2e5c5a2bed461f32345232516451b07..661ad91ba801f9d76c1ac016c5a89c770862891b 100644
--- a/core/modules/node/src/Tests/Views/NodeTestBase.php
+++ b/core/modules/node/src/Tests/Views/NodeTestBase.php
@@ -15,13 +15,13 @@ abstract class NodeTestBase extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_test_views');
+  public static $modules = ['node_test_views'];
 
   protected function setUp($import_test_views = TRUE) {
     parent::setUp($import_test_views);
 
     if ($import_test_views) {
-      ViewTestData::createTestViews(get_class($this), array('node_test_views'));
+      ViewTestData::createTestViews(get_class($this), ['node_test_views']);
     }
   }
 
diff --git a/core/modules/node/src/Tests/Views/PathPluginTest.php b/core/modules/node/src/Tests/Views/PathPluginTest.php
index 1ee6272d34e284b74f66d73d06d9da7331c4fc05..6558f00da9fcc30d892742ac2bfd24bd1023ff45 100644
--- a/core/modules/node/src/Tests/Views/PathPluginTest.php
+++ b/core/modules/node/src/Tests/Views/PathPluginTest.php
@@ -16,14 +16,14 @@ class PathPluginTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_node_path_plugin');
+  public static $testViews = ['test_node_path_plugin'];
 
   /**
    * Contains all nodes used by this test.
@@ -35,21 +35,21 @@ class PathPluginTest extends NodeTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
 
     // Create two nodes.
     for ($i = 0; $i < 2; $i++) {
       $this->nodes[] = $this->drupalCreateNode(
-        array(
+        [
           'type' => 'article',
-          'body' => array(
-            array(
+          'body' => [
+            [
               'value' => $this->randomMachineName(42),
               'format' => filter_default_format(),
               'summary' => $this->randomMachineName(),
-            ),
-          ),
-        )
+            ],
+          ],
+        ]
       );
     }
   }
diff --git a/core/modules/node/src/Tests/Views/RevisionRelationshipsTest.php b/core/modules/node/src/Tests/Views/RevisionRelationshipsTest.php
index f4b34f169dc827cc564dada76f43d0bc9b5b59aa..51e200c020e30bd2b0b3f7174d963c1ae1085f0e 100644
--- a/core/modules/node/src/Tests/Views/RevisionRelationshipsTest.php
+++ b/core/modules/node/src/Tests/Views/RevisionRelationshipsTest.php
@@ -18,12 +18,12 @@ class RevisionRelationshipsTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node' , 'node_test_views');
+  public static $modules = ['node' , 'node_test_views'];
 
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('node_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['node_test_views']);
   }
 
   /**
@@ -31,7 +31,7 @@ protected function setUp() {
    *
    * @var array
    */
-  public static $testViews = array('test_node_revision_nid', 'test_node_revision_vid');
+  public static $testViews = ['test_node_revision_nid', 'test_node_revision_vid'];
 
   /**
    * Create a node with revision and rest result count for both views.
@@ -42,40 +42,40 @@ public function testNodeRevisionRelationship() {
     $node_revision = clone $node;
     $node_revision->setNewRevision();
     $node_revision->save();
-    $column_map = array(
+    $column_map = [
       'vid' => 'vid',
       'node_field_data_node_field_revision_nid' => 'node_node_revision_nid',
       'nid_1' => 'nid_1',
-    );
+    ];
 
     // Here should be two rows.
     $view_nid = Views::getView('test_node_revision_nid');
-    $this->executeView($view_nid, array($node->id()));
-    $resultset_nid = array(
-      array(
+    $this->executeView($view_nid, [$node->id()]);
+    $resultset_nid = [
+      [
         'vid' => '1',
         'node_node_revision_nid' => '1',
         'nid_1' => '1',
-      ),
-      array(
+      ],
+      [
         'vid' => '2',
         'node_revision_nid' => '1',
         'node_node_revision_nid' => '1',
         'nid_1' => '1',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view_nid, $resultset_nid, $column_map);
 
     // There should be only one row with active revision 2.
     $view_vid = Views::getView('test_node_revision_vid');
-    $this->executeView($view_vid, array($node->id()));
-    $resultset_vid = array(
-      array(
+    $this->executeView($view_vid, [$node->id()]);
+    $resultset_vid = [
+      [
         'vid' => '2',
         'node_node_revision_nid' => '1',
         'nid_1' => '1',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view_vid, $resultset_vid, $column_map);
   }
 
diff --git a/core/modules/node/src/Tests/Views/RowPluginTest.php b/core/modules/node/src/Tests/Views/RowPluginTest.php
index d13e526eeb893a0d50531746de880376b4401191..160640fd2333bc0bdc6525abd4af4350965581d7 100644
--- a/core/modules/node/src/Tests/Views/RowPluginTest.php
+++ b/core/modules/node/src/Tests/Views/RowPluginTest.php
@@ -17,14 +17,14 @@ class RowPluginTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_node_row_plugin');
+  public static $testViews = ['test_node_row_plugin'];
 
   /**
    * Contains all nodes used by this test.
@@ -36,21 +36,21 @@ class RowPluginTest extends NodeTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
 
     // Create two nodes.
     for ($i = 0; $i < 2; $i++) {
       $this->nodes[] = $this->drupalCreateNode(
-        array(
+        [
           'type' => 'article',
-          'body' => array(
-            array(
+          'body' => [
+            [
               'value' => $this->randomMachineName(42),
               'format' => filter_default_format(),
               'summary' => $this->randomMachineName(),
-            ),
-          ),
-        )
+            ],
+          ],
+        ]
       );
     }
   }
diff --git a/core/modules/node/src/Tests/Views/StatusExtraTest.php b/core/modules/node/src/Tests/Views/StatusExtraTest.php
index d8ae016eee2ca27f2775a44ed7800451402ee315..9e41f5beca0092948853745620e50c7e03ad54e0 100644
--- a/core/modules/node/src/Tests/Views/StatusExtraTest.php
+++ b/core/modules/node/src/Tests/Views/StatusExtraTest.php
@@ -17,19 +17,19 @@ class StatusExtraTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_status_extra');
+  public static $testViews = ['test_status_extra'];
 
   /**
    * Tests the status extra filter.
    */
   public function testStatusExtra() {
-    $node_author = $this->drupalCreateUser(array('view own unpublished content'));
+    $node_author = $this->drupalCreateUser(['view own unpublished content']);
     $node_author_not_unpublished = $this->drupalCreateUser();
     $normal_user = $this->drupalCreateUser();
-    $admin_user = $this->drupalCreateUser(array('bypass node access'));
+    $admin_user = $this->drupalCreateUser(['bypass node access']);
 
     // Create one published and one unpublished node by the admin.
-    $node_published = $this->drupalCreateNode(array('uid' => $admin_user->id()));
+    $node_published = $this->drupalCreateNode(['uid' => $admin_user->id()]);
     $node_unpublished = $this->drupalCreateNode(['uid' => $admin_user->id(), 'status' => NodeInterface::NOT_PUBLISHED]);
 
     // Create one unpublished node by a certain author user.
diff --git a/core/modules/node/tests/modules/node_access_test/node_access_test.module b/core/modules/node/tests/modules/node_access_test/node_access_test.module
index 56b53a92bd3c7149c879e59a0645ac80599e16bd..40baeb53edede3092bd29f2ec815ee8f5d45b5b6 100644
--- a/core/modules/node/tests/modules/node_access_test/node_access_test.module
+++ b/core/modules/node/tests/modules/node_access_test/node_access_test.module
@@ -50,15 +50,15 @@
  * @see node_access_test_node_access_records()
  */
 function node_access_test_node_grants($account, $op) {
-  $grants = array();
-  $grants['node_access_test_author'] = array($account->id());
+  $grants = [];
+  $grants['node_access_test_author'] = [$account->id()];
   if ($op == 'view' && $account->hasPermission('node test view', $account)) {
-    $grants['node_access_test'] = array(8888, 8889);
+    $grants['node_access_test'] = [8888, 8889];
   }
 
   $no_access_uid = \Drupal::state()->get('node_access_test.no_access_uid') ?: 0;
   if ($op == 'view' && $account->id() == $no_access_uid) {
-    $grants['node_access_all'] = array(0);
+    $grants['node_access_all'] = [0];
   }
   return $grants;
 }
@@ -77,37 +77,37 @@ function node_access_test_node_grants($account, $op) {
  * @see node_access_test.permissions.yml
  */
 function node_access_test_node_access_records(NodeInterface $node) {
-  $grants = array();
+  $grants = [];
   // For NodeAccessBaseTableTestCase, only set records for private nodes.
   if (!\Drupal::state()->get('node_access_test.private') || $node->private->value) {
     // Groups 8888 and 8889 for the node_access_test realm both receive a view
     // grant for all controlled nodes. See node_access_test_node_grants().
-    $grants[] = array(
+    $grants[] = [
       'realm' => 'node_access_test',
       'gid' => 8888,
       'grant_view' => 1,
       'grant_update' => 0,
       'grant_delete' => 0,
       'priority' => 0,
-    );
-    $grants[] = array(
+    ];
+    $grants[] = [
       'realm' => 'node_access_test',
       'gid' => 8889,
       'grant_view' => 1,
       'grant_update' => 0,
       'grant_delete' => 0,
       'priority' => 0,
-    );
+    ];
     // For the author realm, the group ID is equivalent to a user ID, which
     // means there are many many groups of just 1 user.
-    $grants[] = array(
+    $grants[] = [
       'realm' => 'node_access_test_author',
       'gid' => $node->getOwnerId(),
       'grant_view' => 1,
       'grant_update' => 1,
       'grant_delete' => 1,
       'priority' => 0,
-    );
+    ];
   }
 
   return $grants;
@@ -120,25 +120,25 @@ function node_access_test_node_access_records(NodeInterface $node) {
  *   A node type entity.
  */
 function node_access_test_add_field(NodeTypeInterface $type) {
-  $field_storage = FieldStorageConfig::create(array(
+  $field_storage = FieldStorageConfig::create([
     'field_name' => 'private',
     'entity_type' => 'node',
     'type' => 'integer',
-  ));
+  ]);
   $field_storage->save();
-  $field = FieldConfig::create(array(
+  $field = FieldConfig::create([
     'field_name' => 'private',
     'entity_type' => 'node',
     'bundle' => $type->id(),
     'label' => 'Private',
-  ));
+  ]);
   $field->save();
 
   // Assign widget settings for the 'default' form mode.
   entity_get_form_display('node', $type->id(), 'default')
-    ->setComponent('private', array(
+    ->setComponent('private', [
       'type' => 'number',
-    ))
+    ])
     ->save();
 }
 
diff --git a/core/modules/node/tests/modules/node_access_test_empty/node_access_test_empty.module b/core/modules/node/tests/modules/node_access_test_empty/node_access_test_empty.module
index 67558e6133ac771a7db7c79eec64d391aff2ee4a..d67365a40f308ac06dcc0c7cde9effead21a746a 100644
--- a/core/modules/node/tests/modules/node_access_test_empty/node_access_test_empty.module
+++ b/core/modules/node/tests/modules/node_access_test_empty/node_access_test_empty.module
@@ -11,12 +11,12 @@
  * Implements hook_node_grants().
  */
 function node_access_test_empty_node_grants($account, $op) {
-  return array();
+  return [];
 }
 
 /**
  * Implements hook_node_access_records().
  */
 function node_access_test_empty_node_access_records(NodeInterface $node) {
-  return array();
+  return [];
 }
diff --git a/core/modules/node/tests/modules/node_access_test_language/node_access_test_language.module b/core/modules/node/tests/modules/node_access_test_language/node_access_test_language.module
index ece18d824ec0c01fb4501fd4ccaf42fb590137cd..565c100e78c907e5d7048bb307f02aba246a6afb 100644
--- a/core/modules/node/tests/modules/node_access_test_language/node_access_test_language.module
+++ b/core/modules/node/tests/modules/node_access_test_language/node_access_test_language.module
@@ -16,7 +16,7 @@
  * This module defines a single grant realm. All users belong to this group.
  */
 function node_access_test_language_node_grants($account, $op) {
-  $grants['node_access_language_test'] = array(7888);
+  $grants['node_access_language_test'] = [7888];
   return $grants;
 }
 
@@ -24,13 +24,13 @@ function node_access_test_language_node_grants($account, $op) {
  * Implements hook_node_access_records().
  */
 function node_access_test_language_node_access_records(NodeInterface $node) {
-  $grants = array();
+  $grants = [];
 
   // Create grants for each translation of the node.
   foreach ($node->getTranslationLanguages() as $langcode => $language) {
     // If the translation is not marked as private, grant access.
     $translation = $node->getTranslation($langcode);
-    $grants[] = array(
+    $grants[] = [
       'realm' => 'node_access_language_test',
       'gid' => 7888,
       'grant_view' => empty($translation->field_private->value) ? 1 : 0,
@@ -38,7 +38,7 @@ function node_access_test_language_node_access_records(NodeInterface $node) {
       'grant_delete' => 0,
       'priority' => 0,
       'langcode' => $langcode,
-    );
+    ];
   }
   return $grants;
 }
diff --git a/core/modules/node/tests/modules/node_test/node_test.module b/core/modules/node/tests/modules/node_test/node_test.module
index 866be199c75d3304f17296347b1bd48c5e51198c..c852b441102b94156fa0122218fcaffa6c27f5c1 100644
--- a/core/modules/node/tests/modules/node_test/node_test.module
+++ b/core/modules/node/tests/modules/node_test/node_test.module
@@ -21,23 +21,23 @@
 function node_test_node_view(array &$build, NodeInterface $node, EntityViewDisplayInterface $display, $view_mode) {
   if ($view_mode == 'rss') {
     // Add RSS elements and namespaces when building the RSS feed.
-    $node->rss_elements[] = array(
+    $node->rss_elements[] = [
       'key' => 'testElement',
-      'value' => t('Value of testElement RSS element for node @nid.', array('@nid' => $node->id())),
-    );
+      'value' => t('Value of testElement RSS element for node @nid.', ['@nid' => $node->id()]),
+    ];
 
     // Add content that should be displayed only in the RSS feed.
-    $build['extra_feed_content'] = array(
-      '#markup' => '<p>' . t('Extra data that should appear only in the RSS feed for node @nid.', array('@nid' => $node->id())) . '</p>',
+    $build['extra_feed_content'] = [
+      '#markup' => '<p>' . t('Extra data that should appear only in the RSS feed for node @nid.', ['@nid' => $node->id()]) . '</p>',
       '#weight' => 10,
-    );
+    ];
   }
 
   if ($view_mode != 'rss') {
     // Add content that should NOT be displayed in the RSS feed.
-    $build['extra_non_feed_content'] = array(
-      '#markup' => '<p>' . t('Extra data that should appear everywhere except the RSS feed for node @nid.', array('@nid' => $node->id())) . '</p>',
-    );
+    $build['extra_non_feed_content'] = [
+      '#markup' => '<p>' . t('Extra data that should appear everywhere except the RSS feed for node @nid.', ['@nid' => $node->id()]) . '</p>',
+    ];
   }
 }
 
@@ -57,11 +57,11 @@ function node_test_node_grants(AccountInterface $account, $op) {
   // Give everyone full grants so we don't break other node tests.
   // Our node access tests asserts three realms of access.
   // See testGrantAlter().
-  return array(
-    'test_article_realm' => array(1),
-    'test_page_realm' => array(1),
-    'test_alter_realm' => array(2),
-  );
+  return [
+    'test_article_realm' => [1],
+    'test_page_realm' => [1],
+    'test_alter_realm' => [2],
+  ];
 }
 
 /**
@@ -72,28 +72,28 @@ function node_test_node_access_records(NodeInterface $node) {
   if (!empty($node->disable_node_access)) {
     return;
   }
-  $grants = array();
+  $grants = [];
   if ($node->getType() == 'article') {
     // Create grant in arbitrary article_realm for article nodes.
-    $grants[] = array(
+    $grants[] = [
       'realm' => 'test_article_realm',
       'gid' => 1,
       'grant_view' => 1,
       'grant_update' => 0,
       'grant_delete' => 0,
       'priority' => 0,
-    );
+    ];
   }
   elseif ($node->getType() == 'page') {
     // Create grant in arbitrary page_realm for page nodes.
-    $grants[] = array(
+    $grants[] = [
       'realm' => 'test_page_realm',
       'gid' => 1,
       'grant_view' => 1,
       'grant_update' => 0,
       'grant_delete' => 0,
       'priority' => 0,
-    );
+    ];
   }
   return $grants;
 }
@@ -118,7 +118,7 @@ function node_test_node_access_records_alter(&$grants, NodeInterface $node) {
  */
 function node_test_node_grants_alter(&$grants, AccountInterface $account, $op) {
   // Return an empty array of grants to prove that we can alter by reference.
-  $grants = array();
+  $grants = [];
 }
 
 /**
diff --git a/core/modules/node/tests/src/Functional/MultiStepNodeFormBasicOptionsTest.php b/core/modules/node/tests/src/Functional/MultiStepNodeFormBasicOptionsTest.php
index 36ac5190ee5d14477a9935767c970e27a773d23c..2712c0cbff7202c319e9fe080821aa0abe997099 100644
--- a/core/modules/node/tests/src/Functional/MultiStepNodeFormBasicOptionsTest.php
+++ b/core/modules/node/tests/src/Functional/MultiStepNodeFormBasicOptionsTest.php
@@ -24,17 +24,17 @@ class MultiStepNodeFormBasicOptionsTest extends NodeTestBase {
    */
   function testMultiStepNodeFormBasicOptions() {
     // Prepare a user to create the node.
-    $web_user = $this->drupalCreateUser(array('administer nodes', 'create page content'));
+    $web_user = $this->drupalCreateUser(['administer nodes', 'create page content']);
     $this->drupalLogin($web_user);
 
     // Create an unlimited cardinality field.
     $this->fieldName = Unicode::strtolower($this->randomMachineName());
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'node',
       'type' => 'text',
       'cardinality' => -1,
-    ))->save();
+    ])->save();
 
     // Attach an instance of the field to the page content type.
     FieldConfig::create([
@@ -44,17 +44,17 @@ function testMultiStepNodeFormBasicOptions() {
       'label' => $this->randomMachineName() . '_label',
     ])->save();
     entity_get_form_display('node', 'page', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'text_textfield',
-      ))
+      ])
       ->save();
 
-    $edit = array(
+    $edit = [
       'title[0][value]' => 'a',
       'promote[value]' => FALSE,
       'sticky[value]' => 1,
       "{$this->fieldName}[0][value]" => $this->randomString(32),
-    );
+    ];
     $this->drupalPostForm('node/add/page', $edit, t('Add another item'));
     $this->assertNoFieldChecked('edit-promote-value', 'Promote stayed unchecked');
     $this->assertFieldChecked('edit-sticky-value', 'Sticky stayed checked');
diff --git a/core/modules/node/tests/src/Functional/NodeAccessFieldTest.php b/core/modules/node/tests/src/Functional/NodeAccessFieldTest.php
index a84b7b61dec5fd27612d93a910e2832e75b6ec8c..af14546fdc913abf2e4638ccf66cd8d2d6980d51 100644
--- a/core/modules/node/tests/src/Functional/NodeAccessFieldTest.php
+++ b/core/modules/node/tests/src/Functional/NodeAccessFieldTest.php
@@ -17,7 +17,7 @@ class NodeAccessFieldTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_access_test', 'field_ui');
+  public static $modules = ['node_access_test', 'field_ui'];
 
   /**
    * A user with permission to bypass access content.
@@ -46,16 +46,16 @@ protected function setUp() {
     node_access_rebuild();
 
     // Create some users.
-    $this->adminUser = $this->drupalCreateUser(array('access content', 'bypass node access'));
-    $this->contentAdminUser = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node fields'));
+    $this->adminUser = $this->drupalCreateUser(['access content', 'bypass node access']);
+    $this->contentAdminUser = $this->drupalCreateUser(['access content', 'administer content types', 'administer node fields']);
 
     // Add a custom field to the page content type.
     $this->fieldName = Unicode::strtolower($this->randomMachineName() . '_field_name');
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'node',
       'type' => 'text'
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'node',
@@ -74,9 +74,9 @@ protected function setUp() {
    */
   function testNodeAccessAdministerField() {
     // Create a page node.
-    $fieldData = array();
+    $fieldData = [];
     $value = $fieldData[0]['value'] = $this->randomMachineName();
-    $node = $this->drupalCreateNode(array($this->fieldName => $fieldData));
+    $node = $this->drupalCreateNode([$this->fieldName => $fieldData]);
 
     // Log in as the administrator and confirm that the field value is present.
     $this->drupalLogin($this->adminUser);
@@ -89,7 +89,7 @@ function testNodeAccessAdministerField() {
     $this->assertText('Access denied', 'Access is denied for the content admin.');
 
     // Modify the field default as the content admin.
-    $edit = array();
+    $edit = [];
     $default = 'Sometimes words have two meanings';
     $edit["default_value_input[{$this->fieldName}][0][value]"] = $default;
     $this->drupalPostForm(
diff --git a/core/modules/node/tests/src/Functional/NodeAccessGrantsCacheContextTest.php b/core/modules/node/tests/src/Functional/NodeAccessGrantsCacheContextTest.php
index 7963e870a04f122b5021f4f1bfe535df748efaa1..fa2116ab875690935955fdf75f27bbd59715eb47 100644
--- a/core/modules/node/tests/src/Functional/NodeAccessGrantsCacheContextTest.php
+++ b/core/modules/node/tests/src/Functional/NodeAccessGrantsCacheContextTest.php
@@ -15,7 +15,7 @@ class NodeAccessGrantsCacheContextTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_access_test');
+  public static $modules = ['node_access_test'];
 
   /**
    * User with permission to view content.
@@ -43,9 +43,9 @@ protected function setUp() {
 
     // Create user with simple node access permission. The 'node test view'
     // permission is implemented and granted by the node_access_test module.
-    $this->accessUser = $this->drupalCreateUser(array('access content overview', 'access content', 'node test view'));
-    $this->noAccessUser = $this->drupalCreateUser(array('access content overview', 'access content'));
-    $this->noAccessUser2 = $this->drupalCreateUser(array('access content overview', 'access content'));
+    $this->accessUser = $this->drupalCreateUser(['access content overview', 'access content', 'node test view']);
+    $this->noAccessUser = $this->drupalCreateUser(['access content overview', 'access content']);
+    $this->noAccessUser2 = $this->drupalCreateUser(['access content overview', 'access content']);
 
     $this->userMapping = [
       1 => $this->rootUser,
@@ -84,14 +84,14 @@ public function testCacheContext() {
 
     // Grant view to all nodes (because nid = 0) for users in the
     // 'node_access_all' realm.
-    $record = array(
+    $record = [
       'nid' => 0,
       'gid' => 0,
       'realm' => 'node_access_all',
       'grant_view' => 1,
       'grant_update' => 0,
       'grant_delete' => 0,
-    );
+    ];
     db_insert('node_access')->fields($record)->execute();
 
     // Put user accessUser (uid 0) in the realm.
diff --git a/core/modules/node/tests/src/Functional/NodeAccessLanguageAwareCombinationTest.php b/core/modules/node/tests/src/Functional/NodeAccessLanguageAwareCombinationTest.php
index 860bebee28668d5d9153c0f2d2138968e654c573..ff4d1a248af14ecafcf6edfa74eb1b6986fe8918 100644
--- a/core/modules/node/tests/src/Functional/NodeAccessLanguageAwareCombinationTest.php
+++ b/core/modules/node/tests/src/Functional/NodeAccessLanguageAwareCombinationTest.php
@@ -22,14 +22,14 @@ class NodeAccessLanguageAwareCombinationTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'node_access_test_language', 'node_access_test');
+  public static $modules = ['language', 'node_access_test_language', 'node_access_test'];
 
   /**
    * A set of nodes to use in testing.
    *
    * @var \Drupal\node\NodeInterface[]
    */
-  protected $nodes = array();
+  protected $nodes = [];
 
   /**
    * A normal authenticated user.
@@ -52,24 +52,24 @@ protected function setUp() {
 
     // Create the 'private' field, which allows the node to be marked as private
     // (restricted access) in a given translation.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_private',
       'entity_type' => 'node',
       'type' => 'boolean',
       'cardinality' => 1,
-    ));
+    ]);
     $field_storage->save();
 
     FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'page',
-      'widget' => array(
+      'widget' => [
         'type' => 'options_buttons',
-      ),
-      'settings' => array(
+      ],
+      'settings' => [
         'on_label' => 'Private',
         'off_label' => 'Not private',
-      ),
+      ],
     ])->save();
 
     // After enabling a node access module, the access table has to be rebuild.
@@ -80,7 +80,7 @@ protected function setUp() {
     ConfigurableLanguage::createFromLangcode('ca')->save();
 
     // Create a normal authenticated user.
-    $this->webUser = $this->drupalCreateUser(array('access content'));
+    $this->webUser = $this->drupalCreateUser(['access content']);
 
     // Load the user 1 user for later use as an admin user with permission to
     // see everything.
@@ -101,92 +101,92 @@ protected function setUp() {
     // 4. One public with only the Catalan translation private.
     // 5. One public with both the Hungarian and Catalan translations private.
     // 6. One private with both the Hungarian and Catalan translations private.
-    $this->nodes['public_both_public'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['public_both_public'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 0)),
+      'field_private' => [['value' => 0]],
       'private' => FALSE,
-    ));
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
-    $this->nodes['private_both_public'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['private_both_public'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 0)),
+      'field_private' => [['value' => 0]],
       'private' => TRUE,
-    ));
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
-    $this->nodes['public_hu_private'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['public_hu_private'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 1)),
+      'field_private' => [['value' => 1]],
       'private' => FALSE,
-    ));
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
-    $this->nodes['public_ca_private'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['public_ca_private'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 0)),
+      'field_private' => [['value' => 0]],
       'private' => FALSE,
-    ));
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
-    $this->nodes['public_both_private'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['public_both_private'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 1)),
+      'field_private' => [['value' => 1]],
       'private' => FALSE,
-    ));
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
-    $this->nodes['private_both_private'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['private_both_private'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 1)),
+      'field_private' => [['value' => 1]],
       'private' => TRUE,
-    ));
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
-    $this->nodes['public_no_language_private'] = $this->drupalCreateNode(array(
-      'field_private' => array(array('value' => 1)),
+    $this->nodes['public_no_language_private'] = $this->drupalCreateNode([
+      'field_private' => [['value' => 1]],
       'private' => FALSE,
         'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
-    $this->nodes['public_no_language_public'] = $this->drupalCreateNode(array(
-      'field_private' => array(array('value' => 0)),
+    ]);
+    $this->nodes['public_no_language_public'] = $this->drupalCreateNode([
+      'field_private' => [['value' => 0]],
       'private' => FALSE,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
-    $this->nodes['private_no_language_private'] = $this->drupalCreateNode(array(
-      'field_private' => array(array('value' => 1)),
+    ]);
+    $this->nodes['private_no_language_private'] = $this->drupalCreateNode([
+      'field_private' => [['value' => 1]],
       'private' => TRUE,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
-    $this->nodes['private_no_language_public'] = $this->drupalCreateNode(array(
-      'field_private' => array(array('value' => 1)),
+    ]);
+    $this->nodes['private_no_language_public'] = $this->drupalCreateNode([
+      'field_private' => [['value' => 1]],
       'private' => TRUE,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
   }
 
   /**
@@ -194,8 +194,8 @@ protected function setUp() {
    */
   function testNodeAccessLanguageAwareCombination() {
 
-    $expected_node_access = array('view' => TRUE, 'update' => FALSE, 'delete' => FALSE);
-    $expected_node_access_no_access = array('view' => FALSE, 'update' => FALSE, 'delete' => FALSE);
+    $expected_node_access = ['view' => TRUE, 'update' => FALSE, 'delete' => FALSE];
+    $expected_node_access_no_access = ['view' => FALSE, 'update' => FALSE, 'delete' => FALSE];
 
     // When the node and both translations are public, access should always be
     // granted.
@@ -254,7 +254,7 @@ function testNodeAccessLanguageAwareCombination() {
 
     // Query with no language specified. The fallback (hu or und) will be used.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->webUser)
       ->addTag('node_access');
     $nids = $select->execute()->fetchAllAssoc('nid');
@@ -269,7 +269,7 @@ function testNodeAccessLanguageAwareCombination() {
 
     // Query with Hungarian (hu) specified.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->webUser)
       ->addMetaData('langcode', 'hu')
       ->addTag('node_access');
@@ -283,7 +283,7 @@ function testNodeAccessLanguageAwareCombination() {
 
     // Query with Catalan (ca) specified.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->webUser)
       ->addMetaData('langcode', 'ca')
       ->addTag('node_access');
@@ -297,7 +297,7 @@ function testNodeAccessLanguageAwareCombination() {
 
     // Query with German (de) specified.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->webUser)
       ->addMetaData('langcode', 'de')
       ->addTag('node_access');
@@ -309,7 +309,7 @@ function testNodeAccessLanguageAwareCombination() {
     // Query the nodes table as admin user (full access) with the node access
     // tag and no specific langcode.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->adminUser)
       ->addTag('node_access');
     $nids = $select->execute()->fetchAllAssoc('nid');
@@ -320,7 +320,7 @@ function testNodeAccessLanguageAwareCombination() {
     // Query the nodes table as admin user (full access) with the node access
     // tag and langcode de.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->adminUser)
       ->addMetaData('langcode', 'de')
       ->addTag('node_access');
diff --git a/core/modules/node/tests/src/Functional/NodeAccessLanguageAwareTest.php b/core/modules/node/tests/src/Functional/NodeAccessLanguageAwareTest.php
index 90e040b27ad95c51c1e4e8a2adc8ba8536e9cd90..9338e5de6a467d4bd21ef51d6ee459dfad70f55c 100644
--- a/core/modules/node/tests/src/Functional/NodeAccessLanguageAwareTest.php
+++ b/core/modules/node/tests/src/Functional/NodeAccessLanguageAwareTest.php
@@ -21,14 +21,14 @@ class NodeAccessLanguageAwareTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'node_access_test_language');
+  public static $modules = ['language', 'node_access_test_language'];
 
   /**
    * A set of nodes to use in testing.
    *
    * @var \Drupal\node\NodeInterface[]
    */
-  protected $nodes = array();
+  protected $nodes = [];
 
   /**
    * A user with permission to bypass access content.
@@ -49,31 +49,31 @@ protected function setUp() {
 
     // Create the 'private' field, which allows the node to be marked as private
     // (restricted access) in a given translation.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_private',
       'entity_type' => 'node',
       'type' => 'boolean',
       'cardinality' => 1,
-    ));
+    ]);
     $field_storage->save();
 
     FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => 'page',
-      'widget' => array(
+      'widget' => [
         'type' => 'options_buttons',
-      ),
-      'settings' => array(
+      ],
+      'settings' => [
         'on_label' => 'Private',
         'off_label' => 'Not private',
-      ),
+      ],
     ])->save();
 
     // After enabling a node access module, the access table has to be rebuild.
     node_access_rebuild();
 
     // Create a normal authenticated user.
-    $this->webUser = $this->drupalCreateUser(array('access content'));
+    $this->webUser = $this->drupalCreateUser(['access content']);
 
     // Load the user 1 user for later use as an admin user with permission to
     // see everything.
@@ -95,54 +95,54 @@ protected function setUp() {
     // 2. Two nodes with no language specified.
     //   - One public.
     //   - One private.
-    $this->nodes['both_public'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['both_public'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 0)),
-    ));
+      'field_private' => [['value' => 0]],
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
-    $this->nodes['ca_private'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['ca_private'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 0)),
-    ));
+      'field_private' => [['value' => 0]],
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
-    $this->nodes['hu_private'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['hu_private'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 1)),
-    ));
+      'field_private' => [['value' => 1]],
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
-    $this->nodes['both_private'] = $node = $this->drupalCreateNode(array(
-      'body' => array(array()),
+    $this->nodes['both_private'] = $node = $this->drupalCreateNode([
+      'body' => [[]],
       'langcode' => 'hu',
-      'field_private' => array(array('value' => 1)),
-    ));
+      'field_private' => [['value' => 1]],
+    ]);
     $translation = $node->addTranslation('ca');
     $translation->title->value = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
-    $this->nodes['no_language_public'] = $this->drupalCreateNode(array(
-      'field_private' => array(array('value' => 0)),
+    $this->nodes['no_language_public'] = $this->drupalCreateNode([
+      'field_private' => [['value' => 0]],
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
-    $this->nodes['no_language_private'] = $this->drupalCreateNode(array(
-      'field_private' => array(array('value' => 1)),
+    ]);
+    $this->nodes['no_language_private'] = $this->drupalCreateNode([
+      'field_private' => [['value' => 1]],
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
   }
 
   /**
@@ -150,8 +150,8 @@ protected function setUp() {
    */
   function testNodeAccessLanguageAware() {
     // The node_access_test_language module only grants view access.
-    $expected_node_access = array('view' => TRUE, 'update' => FALSE, 'delete' => FALSE);
-    $expected_node_access_no_access = array('view' => FALSE, 'update' => FALSE, 'delete' => FALSE);
+    $expected_node_access = ['view' => TRUE, 'update' => FALSE, 'delete' => FALSE];
+    $expected_node_access_no_access = ['view' => FALSE, 'update' => FALSE, 'delete' => FALSE];
 
     // When both Hungarian and Catalan are marked as public, access to the
     // Hungarian translation should be granted with the default entity object or
@@ -195,7 +195,7 @@ function testNodeAccessLanguageAware() {
 
     // Query with no language specified. The fallback (hu) will be used.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->webUser)
       ->addTag('node_access');
     $nids = $select->execute()->fetchAllAssoc('nid');
@@ -211,7 +211,7 @@ function testNodeAccessLanguageAware() {
 
     // Query with Hungarian (hu) specified.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->webUser)
       ->addMetaData('langcode', 'hu')
       ->addTag('node_access');
@@ -225,7 +225,7 @@ function testNodeAccessLanguageAware() {
 
     // Query with Catalan (ca) specified.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->webUser)
       ->addMetaData('langcode', 'ca')
       ->addTag('node_access');
@@ -239,7 +239,7 @@ function testNodeAccessLanguageAware() {
 
     // Query with German (de) specified.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->webUser)
       ->addMetaData('langcode', 'de')
       ->addTag('node_access');
@@ -251,7 +251,7 @@ function testNodeAccessLanguageAware() {
     // Query the nodes table as admin user (full access) with the node access
     // tag and no specific langcode.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->adminUser)
       ->addTag('node_access');
     $nids = $select->execute()->fetchAllAssoc('nid');
@@ -262,7 +262,7 @@ function testNodeAccessLanguageAware() {
     // Query the nodes table as admin user (full access) with the node access
     // tag and langcode de.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $this->adminUser)
       ->addMetaData('langcode', 'de')
       ->addTag('node_access');
diff --git a/core/modules/node/tests/src/Functional/NodeAccessLanguageTest.php b/core/modules/node/tests/src/Functional/NodeAccessLanguageTest.php
index e7586763bf7b856e8a4e7c831b3f4d8c0366f0ca..2c9bcc3a74b02e618f4913dc7fc57602603cdbfd 100644
--- a/core/modules/node/tests/src/Functional/NodeAccessLanguageTest.php
+++ b/core/modules/node/tests/src/Functional/NodeAccessLanguageTest.php
@@ -20,7 +20,7 @@ class NodeAccessLanguageTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'node_access_test');
+  public static $modules = ['language', 'node_access_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -43,14 +43,14 @@ protected function setUp() {
    * Tests node access with multiple node languages and no private nodes.
    */
   function testNodeAccess() {
-    $web_user = $this->drupalCreateUser(array('access content'));
+    $web_user = $this->drupalCreateUser(['access content']);
 
-    $expected_node_access = array('view' => TRUE, 'update' => FALSE, 'delete' => FALSE);
-    $expected_node_access_no_access = array('view' => FALSE, 'update' => FALSE, 'delete' => FALSE);
+    $expected_node_access = ['view' => TRUE, 'update' => FALSE, 'delete' => FALSE];
+    $expected_node_access_no_access = ['view' => FALSE, 'update' => FALSE, 'delete' => FALSE];
 
     // Creating a public node with langcode Hungarian, will be saved as the
     // fallback in node access table.
-    $node_public_hu = $this->drupalCreateNode(array('body' => array(array()), 'langcode' => 'hu', 'private' => FALSE));
+    $node_public_hu = $this->drupalCreateNode(['body' => [[]], 'langcode' => 'hu', 'private' => FALSE]);
     $this->assertTrue($node_public_hu->language()->getId() == 'hu', 'Node created as Hungarian.');
 
     // Tests the default access is provided for the public Hungarian node.
@@ -61,10 +61,10 @@ function testNodeAccess() {
 
     // Creating a public node with no special langcode, like when no language
     // module enabled.
-    $node_public_no_language = $this->drupalCreateNode(array(
+    $node_public_no_language = $this->drupalCreateNode([
       'private' => FALSE,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
     $this->assertTrue($node_public_no_language->language()->getId() == LanguageInterface::LANGCODE_NOT_SPECIFIED, 'Node created with not specified language.');
 
     // Tests that access is granted if requested with no language.
@@ -73,7 +73,7 @@ function testNodeAccess() {
     // Reset the node access cache and turn on our test node access code.
     \Drupal::entityManager()->getAccessControlHandler('node')->resetCache();
     \Drupal::state()->set('node_access_test_secret_catalan', 1);
-    $node_public_ca = $this->drupalCreateNode(array('body' => array(array()), 'langcode' => 'ca', 'private' => FALSE));
+    $node_public_ca = $this->drupalCreateNode(['body' => [[]], 'langcode' => 'ca', 'private' => FALSE]);
     $this->assertTrue($node_public_ca->language()->getId() == 'ca', 'Node created as Catalan.');
 
     // Tests that access is granted if requested with no language.
@@ -113,13 +113,13 @@ function testNodeAccess() {
    * Tests node access with multiple node languages and private nodes.
    */
   function testNodeAccessPrivate() {
-    $web_user = $this->drupalCreateUser(array('access content'));
-    $expected_node_access = array('view' => TRUE, 'update' => FALSE, 'delete' => FALSE);
-    $expected_node_access_no_access = array('view' => FALSE, 'update' => FALSE, 'delete' => FALSE);
+    $web_user = $this->drupalCreateUser(['access content']);
+    $expected_node_access = ['view' => TRUE, 'update' => FALSE, 'delete' => FALSE];
+    $expected_node_access_no_access = ['view' => FALSE, 'update' => FALSE, 'delete' => FALSE];
 
     // Creating a private node with langcode Hungarian, will be saved as the
     // fallback in node access table.
-    $node_private_hu = $this->drupalCreateNode(array('body' => array(array()), 'langcode' => 'hu', 'private' => TRUE));
+    $node_private_hu = $this->drupalCreateNode(['body' => [[]], 'langcode' => 'hu', 'private' => TRUE]);
     $this->assertTrue($node_private_hu->language()->getId() == 'hu', 'Node created as Hungarian.');
 
     // Tests the default access is not provided for the private Hungarian node.
@@ -130,10 +130,10 @@ function testNodeAccessPrivate() {
 
     // Creating a private node with no special langcode, like when no language
     // module enabled.
-    $node_private_no_language = $this->drupalCreateNode(array(
+    $node_private_no_language = $this->drupalCreateNode([
       'private' => TRUE,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
     $this->assertTrue($node_private_no_language->language()->getId() == LanguageInterface::LANGCODE_NOT_SPECIFIED, 'Node created with not specified language.');
 
     // Tests that access is not granted if requested with no language.
@@ -148,8 +148,8 @@ function testNodeAccessPrivate() {
 
     // Creating a private node with langcode Catalan to test that the
     // node_access_test_secret_catalan flag works.
-    $private_ca_user = $this->drupalCreateUser(array('access content', 'node test view'));
-    $node_private_ca = $this->drupalCreateNode(array('body' => array(array()), 'langcode' => 'ca', 'private' => TRUE));
+    $private_ca_user = $this->drupalCreateUser(['access content', 'node test view']);
+    $node_private_ca = $this->drupalCreateNode(['body' => [[]], 'langcode' => 'ca', 'private' => TRUE]);
     $this->assertTrue($node_private_ca->language()->getId() == 'ca', 'Node created as Catalan.');
 
     // Tests that Catalan is still not accessible to either user.
@@ -177,7 +177,7 @@ function testNodeAccessPrivate() {
    */
   function testNodeAccessQueryTag() {
     // Create a normal authenticated user.
-    $web_user = $this->drupalCreateUser(array('access content'));
+    $web_user = $this->drupalCreateUser(['access content']);
 
     // Load the user 1 user for later use as an admin user with permission to
     // see everything.
@@ -185,26 +185,26 @@ function testNodeAccessQueryTag() {
 
     // Creating a private node with langcode Hungarian, will be saved as
     // the fallback in node access table.
-    $node_private = $this->drupalCreateNode(array('body' => array(array()), 'langcode' => 'hu', 'private' => TRUE));
+    $node_private = $this->drupalCreateNode(['body' => [[]], 'langcode' => 'hu', 'private' => TRUE]);
     $this->assertTrue($node_private->language()->getId() == 'hu', 'Node created as Hungarian.');
 
     // Creating a public node with langcode Hungarian, will be saved as
     // the fallback in node access table.
-    $node_public = $this->drupalCreateNode(array('body' => array(array()), 'langcode' => 'hu', 'private' => FALSE));
+    $node_public = $this->drupalCreateNode(['body' => [[]], 'langcode' => 'hu', 'private' => FALSE]);
     $this->assertTrue($node_public->language()->getId() == 'hu', 'Node created as Hungarian.');
 
     // Creating a public node with no special langcode, like when no language
     // module enabled.
-    $node_no_language = $this->drupalCreateNode(array(
+    $node_no_language = $this->drupalCreateNode([
       'private' => FALSE,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
     $this->assertTrue($node_no_language->language()->getId() == LanguageInterface::LANGCODE_NOT_SPECIFIED, 'Node created with not specified language.');
 
     // Query the nodes table as the web user with the node access tag and no
     // specific langcode.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $web_user)
       ->addTag('node_access');
     $nids = $select->execute()->fetchAllAssoc('nid');
@@ -218,7 +218,7 @@ function testNodeAccessQueryTag() {
     // Query the nodes table as the web user with the node access tag and
     // langcode de.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $web_user)
       ->addMetaData('langcode', 'de')
       ->addTag('node_access');
@@ -230,7 +230,7 @@ function testNodeAccessQueryTag() {
     // Query the nodes table as admin user (full access) with the node access
     // tag and no specific langcode.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $admin_user)
       ->addTag('node_access');
     $nids = $select->execute()->fetchAllAssoc('nid');
@@ -241,7 +241,7 @@ function testNodeAccessQueryTag() {
     // Query the nodes table as admin user (full access) with the node access
     // tag and langcode de.
     $select = db_select('node', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->addMetaData('account', $admin_user)
       ->addMetaData('langcode', 'de')
       ->addTag('node_access');
diff --git a/core/modules/node/tests/src/Functional/NodeAccessMenuLinkTest.php b/core/modules/node/tests/src/Functional/NodeAccessMenuLinkTest.php
index 9d12098b870c237f6dc4bae89d35eb7fb609b476..ce6326d54b9b2ea1e1417497c5ca63a424d74b49 100644
--- a/core/modules/node/tests/src/Functional/NodeAccessMenuLinkTest.php
+++ b/core/modules/node/tests/src/Functional/NodeAccessMenuLinkTest.php
@@ -16,7 +16,7 @@ class NodeAccessMenuLinkTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('menu_ui', 'block');
+  public static $modules = ['menu_ui', 'block'];
 
   /**
    * A user with permission to manage menu links and create nodes.
@@ -30,13 +30,13 @@ protected function setUp() {
 
     $this->drupalPlaceBlock('system_menu_block:main');
 
-    $this->contentAdminUser = $this->drupalCreateUser(array(
+    $this->contentAdminUser = $this->drupalCreateUser([
       'access content',
       'administer content types',
       'administer menu'
-    ));
+    ]);
 
-    $this->config('user.role.' . RoleInterface::ANONYMOUS_ID)->set('permissions', array())->save();
+    $this->config('user.role.' . RoleInterface::ANONYMOUS_ID)->set('permissions', [])->save();
   }
 
   /**
@@ -64,7 +64,7 @@ function testNodeAccessMenuLink() {
 
     // Ensure anonymous users with "access content" permission see this menu
     // link.
-    $this->config('user.role.' . RoleInterface::ANONYMOUS_ID)->set('permissions', array('access content'))->save();
+    $this->config('user.role.' . RoleInterface::ANONYMOUS_ID)->set('permissions', ['access content'])->save();
     $this->drupalGet('');
     $this->assertLink($menu_link_title);
   }
diff --git a/core/modules/node/tests/src/Functional/NodeAccessRecordsTest.php b/core/modules/node/tests/src/Functional/NodeAccessRecordsTest.php
index ce16bee6b885dd7e630794f8d1e47b751c7d34a2..13ec1117053c8908a83793e89abe024781f0a714 100644
--- a/core/modules/node/tests/src/Functional/NodeAccessRecordsTest.php
+++ b/core/modules/node/tests/src/Functional/NodeAccessRecordsTest.php
@@ -16,68 +16,68 @@ class NodeAccessRecordsTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_test');
+  public static $modules = ['node_test'];
 
   /**
    * Creates a node and tests the creation of node access rules.
    */
   function testNodeAccessRecords() {
     // Create an article node.
-    $node1 = $this->drupalCreateNode(array('type' => 'article'));
+    $node1 = $this->drupalCreateNode(['type' => 'article']);
     $this->assertTrue(Node::load($node1->id()), 'Article node created.');
 
     // Check to see if grants added by node_test_node_access_records made it in.
-    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', array(':nid' => $node1->id()))->fetchAll();
+    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', [':nid' => $node1->id()])->fetchAll();
     $this->assertEqual(count($records), 1, 'Returned the correct number of rows.');
     $this->assertEqual($records[0]->realm, 'test_article_realm', 'Grant with article_realm acquired for node without alteration.');
     $this->assertEqual($records[0]->gid, 1, 'Grant with gid = 1 acquired for node without alteration.');
 
     // Create an unpromoted "Basic page" node.
-    $node2 = $this->drupalCreateNode(array('type' => 'page', 'promote' => 0));
+    $node2 = $this->drupalCreateNode(['type' => 'page', 'promote' => 0]);
     $this->assertTrue(Node::load($node2->id()), 'Unpromoted basic page node created.');
 
     // Check to see if grants added by node_test_node_access_records made it in.
-    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', array(':nid' => $node2->id()))->fetchAll();
+    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', [':nid' => $node2->id()])->fetchAll();
     $this->assertEqual(count($records), 1, 'Returned the correct number of rows.');
     $this->assertEqual($records[0]->realm, 'test_page_realm', 'Grant with page_realm acquired for node without alteration.');
     $this->assertEqual($records[0]->gid, 1, 'Grant with gid = 1 acquired for node without alteration.');
 
     // Create an unpromoted, unpublished "Basic page" node.
-    $node3 = $this->drupalCreateNode(array('type' => 'page', 'promote' => 0, 'status' => 0));
+    $node3 = $this->drupalCreateNode(['type' => 'page', 'promote' => 0, 'status' => 0]);
     $this->assertTrue(Node::load($node3->id()), 'Unpromoted, unpublished basic page node created.');
 
     // Check to see if grants added by node_test_node_access_records made it in.
-    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', array(':nid' => $node3->id()))->fetchAll();
+    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', [':nid' => $node3->id()])->fetchAll();
     $this->assertEqual(count($records), 1, 'Returned the correct number of rows.');
     $this->assertEqual($records[0]->realm, 'test_page_realm', 'Grant with page_realm acquired for node without alteration.');
     $this->assertEqual($records[0]->gid, 1, 'Grant with gid = 1 acquired for node without alteration.');
 
     // Create a promoted "Basic page" node.
-    $node4 = $this->drupalCreateNode(array('type' => 'page', 'promote' => 1));
+    $node4 = $this->drupalCreateNode(['type' => 'page', 'promote' => 1]);
     $this->assertTrue(Node::load($node4->id()), 'Promoted basic page node created.');
 
     // Check to see if grant added by node_test_node_access_records was altered
     // by node_test_node_access_records_alter.
-    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', array(':nid' => $node4->id()))->fetchAll();
+    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', [':nid' => $node4->id()])->fetchAll();
     $this->assertEqual(count($records), 1, 'Returned the correct number of rows.');
     $this->assertEqual($records[0]->realm, 'test_alter_realm', 'Altered grant with alter_realm acquired for node.');
     $this->assertEqual($records[0]->gid, 2, 'Altered grant with gid = 2 acquired for node.');
 
     // Check to see if we can alter grants with hook_node_grants_alter().
-    $operations = array('view', 'update', 'delete');
+    $operations = ['view', 'update', 'delete'];
     // Create a user that is allowed to access content.
-    $web_user = $this->drupalCreateUser(array('access content'));
+    $web_user = $this->drupalCreateUser(['access content']);
     foreach ($operations as $op) {
       $grants = node_test_node_grants($web_user, $op);
       $altered_grants = $grants;
       \Drupal::moduleHandler()->alter('node_grants', $altered_grants, $web_user, $op);
-      $this->assertNotEqual($grants, $altered_grants, format_string('Altered the %op grant for a user.', array('%op' => $op)));
+      $this->assertNotEqual($grants, $altered_grants, format_string('Altered the %op grant for a user.', ['%op' => $op]));
     }
 
     // Check that core does not grant access to an unpublished node when an
     // empty $grants array is returned.
-    $node6 = $this->drupalCreateNode(array('status' => 0, 'disable_node_access' => TRUE));
-    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', array(':nid' => $node6->id()))->fetchAll();
+    $node6 = $this->drupalCreateNode(['status' => 0, 'disable_node_access' => TRUE]);
+    $records = db_query('SELECT realm, gid FROM {node_access} WHERE nid = :nid', [':nid' => $node6->id()])->fetchAll();
     $this->assertEqual(count($records), 0, 'Returned no records for unpublished node.');
   }
 
diff --git a/core/modules/node/tests/src/Functional/NodeCacheTagsTest.php b/core/modules/node/tests/src/Functional/NodeCacheTagsTest.php
index d0007a13cfef5678c53601ee1b57711fa06ec919..ca5a0a99127ae7db323f9d45de667c061d586ae5 100644
--- a/core/modules/node/tests/src/Functional/NodeCacheTagsTest.php
+++ b/core/modules/node/tests/src/Functional/NodeCacheTagsTest.php
@@ -17,7 +17,7 @@ class NodeCacheTagsTest extends EntityWithUriCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * {@inheritdoc}
@@ -61,7 +61,7 @@ protected function getAdditionalCacheContextsForEntity(EntityInterface $entity)
    * Each node must have an author.
    */
   protected function getAdditionalCacheTagsForEntity(EntityInterface $node) {
-    return array('user:' . $node->getOwnerId(), 'user_view');
+    return ['user:' . $node->getOwnerId(), 'user_view'];
   }
 
   /**
diff --git a/core/modules/node/tests/src/Functional/NodeCreationTest.php b/core/modules/node/tests/src/Functional/NodeCreationTest.php
index 57fd746d69d7642bb516a7e6fc686f54f0b3fc83..8f5fb3500cd0b07b0b24fcc65a952b18599afda7 100644
--- a/core/modules/node/tests/src/Functional/NodeCreationTest.php
+++ b/core/modules/node/tests/src/Functional/NodeCreationTest.php
@@ -21,12 +21,12 @@ class NodeCreationTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_test_exception', 'dblog', 'test_page_test');
+  public static $modules = ['node_test_exception', 'dblog', 'test_page_test'];
 
   protected function setUp() {
     parent::setUp();
 
-    $web_user = $this->drupalCreateUser(array('create page content', 'edit own page content'));
+    $web_user = $this->drupalCreateUser(['create page content', 'edit own page content']);
     $this->drupalLogin($web_user);
   }
 
@@ -42,16 +42,16 @@ function testNodeCreation() {
     $this->assertResponse(200);
     $this->assertUrl('node/add/page');
     // Create a node.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
 
     // Check that the Basic page has been created.
-    $this->assertText(t('@post @title has been created.', array('@post' => 'Basic page', '@title' => $edit['title[0][value]'])), 'Basic page created.');
+    $this->assertText(t('@post @title has been created.', ['@post' => 'Basic page', '@title' => $edit['title[0][value]']]), 'Basic page created.');
 
     // Verify that the creation message contains a link to a node.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'node/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'node/']);
     $this->assert(isset($view_link), 'The message area contains a link to a node');
 
     // Check that the node exists in the database.
@@ -74,7 +74,7 @@ function testNodeCreation() {
     $this->assertText(format_date($node->getCreatedTime()));
 
     // Check if the node revision checkbox is not rendered on node creation form.
-    $admin_user = $this->drupalCreateUser(array('administer nodes', 'create page content'));
+    $admin_user = $this->drupalCreateUser(['administer nodes', 'create page content']);
     $this->drupalLogin($admin_user);
     $this->drupalGet('node/add/page');
     $this->assertNoFieldById('edit-revision', NULL, 'The revision checkbox is not present.');
@@ -85,13 +85,13 @@ function testNodeCreation() {
    */
   function testFailedPageCreation() {
     // Create a node.
-    $edit = array(
+    $edit = [
       'uid'      => $this->loggedInUser->id(),
       'name'     => $this->loggedInUser->name,
       'type'     => 'page',
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
       'title'    => 'testing_transaction_exception',
-    );
+    ];
 
     try {
       // An exception is generated by node_test_exception_node_insert() if the
@@ -137,7 +137,7 @@ function testUnpublishedNodeCreation() {
       ->save();
 
     // Create a node.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
@@ -147,10 +147,10 @@ function testUnpublishedNodeCreation() {
     $this->assertText(t('Test page text'));
 
     // Confirm that the node was created.
-    $this->assertText(t('@post @title has been created.', array('@post' => 'Basic page', '@title' => $edit['title[0][value]'])));
+    $this->assertText(t('@post @title has been created.', ['@post' => 'Basic page', '@title' => $edit['title[0][value]']]));
 
     // Verify that the creation message contains a link to a node.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'node/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'node/']);
     $this->assert(isset($view_link), 'The message area contains a link to a node');
   }
 
@@ -158,7 +158,7 @@ function testUnpublishedNodeCreation() {
    * Tests the author autocompletion textfield.
    */
   public function testAuthorAutocomplete() {
-    $admin_user = $this->drupalCreateUser(array('administer nodes', 'create page content'));
+    $admin_user = $this->drupalCreateUser(['administer nodes', 'create page content']);
     $this->drupalLogin($admin_user);
 
     $this->drupalGet('node/add/page');
@@ -166,7 +166,7 @@ public function testAuthorAutocomplete() {
     $result = $this->xpath('//input[@id="edit-uid-0-value" and contains(@data-autocomplete-path, "user/autocomplete")]');
     $this->assertEqual(count($result), 0, 'No autocompletion without access user profiles.');
 
-    $admin_user = $this->drupalCreateUser(array('administer nodes', 'create page content', 'access user profiles'));
+    $admin_user = $this->drupalCreateUser(['administer nodes', 'create page content', 'access user profiles']);
     $this->drupalLogin($admin_user);
 
     $this->drupalGet('node/add/page');
@@ -191,7 +191,7 @@ function testNodeAddWithoutContentTypes() {
     $this->drupalGet('node/add');
     $this->assertResponse(403);
 
-    $admin_content_types = $this->drupalCreateUser(array('administer content types'));
+    $admin_content_types = $this->drupalCreateUser(['administer content types']);
     $this->drupalLogin($admin_content_types);
 
     $this->drupalGet('node/add');
@@ -209,7 +209,7 @@ function testNodeAddWithoutContentTypes() {
   protected static function getWatchdogIdsForTestExceptionRollback() {
     // PostgreSQL doesn't support bytea LIKE queries, so we need to unserialize
     // first to check for the rollback exception message.
-    $matches = array();
+    $matches = [];
     $query = db_query("SELECT wid, variables FROM {watchdog}");
     foreach ($query as $row) {
       $variables = (array) unserialize($row->variables);
diff --git a/core/modules/node/tests/src/Functional/NodeFormSaveChangedTimeTest.php b/core/modules/node/tests/src/Functional/NodeFormSaveChangedTimeTest.php
index 918a2e7d54c52dd57acec00c079b07c2960b220b..607e68cf0d25b4eeda63e7c49785e19b7a291019 100644
--- a/core/modules/node/tests/src/Functional/NodeFormSaveChangedTimeTest.php
+++ b/core/modules/node/tests/src/Functional/NodeFormSaveChangedTimeTest.php
@@ -16,9 +16,9 @@ class NodeFormSaveChangedTimeTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'node',
-  );
+  ];
 
   /**
    * An user with permissions to create and edit articles.
@@ -34,18 +34,18 @@ protected function setUp() {
     parent::setUp();
 
     // Create a node type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'article',
       'name' => 'Article',
-    ));
+    ]);
 
     $this->authorUser = $this->drupalCreateUser(['access content', 'create article content', 'edit any article content'], 'author');
     $this->drupalLogin($this->authorUser);
 
     // Create one node of the above node type .
-    $this->drupalCreateNode(array(
+    $this->drupalCreateNode([
       'type' => 'article',
-    ));
+    ]);
   }
 
   /**
@@ -65,7 +65,7 @@ public function testChangedTimeAfterSaveWithoutChanges() {
     sleep(1);
 
     // Save the node on the regular node edit form.
-    $this->drupalPostForm('node/1/edit', array(), t('Save'));
+    $this->drupalPostForm('node/1/edit', [], t('Save'));
 
     $storage->resetCache([1]);
     $node = $storage->load(1);
diff --git a/core/modules/node/tests/src/Functional/NodeHelpTest.php b/core/modules/node/tests/src/Functional/NodeHelpTest.php
index ffeee08c2c5b1409fdc76593c19e6c8b346aa608..c4b7139214813d9baa192ef4086db94e03d5ce56 100644
--- a/core/modules/node/tests/src/Functional/NodeHelpTest.php
+++ b/core/modules/node/tests/src/Functional/NodeHelpTest.php
@@ -16,7 +16,7 @@ class NodeHelpTest extends BrowserTestBase {
    *
    * @var array.
    */
-  public static $modules = array('block', 'node', 'help');
+  public static $modules = ['block', 'node', 'help'];
 
   /**
    * The name of the test node type to create.
@@ -39,11 +39,11 @@ protected function setUp() {
     parent::setUp();
 
     // Create user.
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'administer content types',
       'administer nodes',
       'bypass node access',
-    ));
+    ]);
 
     $this->drupalLogin($admin_user);
     $this->drupalPlaceBlock('help_block');
@@ -52,10 +52,10 @@ protected function setUp() {
     $this->testText = t('Help text to find on node forms.');
 
     // Create content type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => $this->testType,
       'help' => $this->testText,
-    ));
+    ]);
   }
 
   /**
@@ -68,7 +68,7 @@ public function testNodeShowHelpText() {
     $this->assertText($this->testText);
 
     // Create node and check the node edit form.
-    $node = $this->drupalCreateNode(array('type' => $this->testType));
+    $node = $this->drupalCreateNode(['type' => $this->testType]);
     $this->drupalGet('node/' . $node->id() . '/edit');
     $this->assertResponse(200);
     $this->assertText($this->testText);
diff --git a/core/modules/node/tests/src/Functional/NodeLinksTest.php b/core/modules/node/tests/src/Functional/NodeLinksTest.php
index f1e2629d3adfb095401d7cfc547fd9ea78ecb674..7bd725b46bfabf1f61a50ad5a1c6d9989d9d4c23 100644
--- a/core/modules/node/tests/src/Functional/NodeLinksTest.php
+++ b/core/modules/node/tests/src/Functional/NodeLinksTest.php
@@ -16,16 +16,16 @@ class NodeLinksTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('views');
+  public static $modules = ['views'];
 
   /**
    * Tests that the links can be hidden in the view display settings.
    */
   public function testHideLinks() {
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'type' => 'article',
       'promote' => NodeInterface::PROMOTED,
-    ));
+    ]);
 
     // Links are displayed by default.
     $this->drupalGet('node');
diff --git a/core/modules/node/tests/src/Functional/NodeLoadMultipleTest.php b/core/modules/node/tests/src/Functional/NodeLoadMultipleTest.php
index 92440caf61102570ab791070ff19f0fb07f5842f..b5d991bcd0a4797d936790f6770ad5853bad4173 100644
--- a/core/modules/node/tests/src/Functional/NodeLoadMultipleTest.php
+++ b/core/modules/node/tests/src/Functional/NodeLoadMultipleTest.php
@@ -16,11 +16,11 @@ class NodeLoadMultipleTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('views');
+  public static $modules = ['views'];
 
   protected function setUp() {
     parent::setUp();
-    $web_user = $this->drupalCreateUser(array('create article content', 'create page content'));
+    $web_user = $this->drupalCreateUser(['create article content', 'create page content']);
     $this->drupalLogin($web_user);
   }
 
@@ -28,10 +28,10 @@ protected function setUp() {
    * Creates four nodes and ensures that they are loaded correctly.
    */
   function testNodeMultipleLoad() {
-    $node1 = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
-    $node2 = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
-    $node3 = $this->drupalCreateNode(array('type' => 'article', 'promote' => 0));
-    $node4 = $this->drupalCreateNode(array('type' => 'page', 'promote' => 0));
+    $node1 = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
+    $node2 = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
+    $node3 = $this->drupalCreateNode(['type' => 'article', 'promote' => 0]);
+    $node4 = $this->drupalCreateNode(['type' => 'page', 'promote' => 0]);
 
     // Confirm that promoted nodes appear in the default node listing.
     $this->drupalGet('node');
@@ -41,16 +41,16 @@ function testNodeMultipleLoad() {
     $this->assertNoText($node4->label(), 'Node title does not appear in the default listing.');
     // Load nodes with only a condition. Nodes 3 and 4 will be loaded.
     $nodes = $this->container->get('entity_type.manager')->getStorage('node')
-      ->loadByProperties(array('promote' => 0));
+      ->loadByProperties(['promote' => 0]);
     $this->assertEqual($node3->label(), $nodes[$node3->id()]->label(), 'Node was loaded.');
     $this->assertEqual($node4->label(), $nodes[$node4->id()]->label(), 'Node was loaded.');
     $count = count($nodes);
-    $this->assertTrue($count == 2, format_string('@count nodes loaded.', array('@count' => $count)));
+    $this->assertTrue($count == 2, format_string('@count nodes loaded.', ['@count' => $count]));
 
     // Load nodes by nid. Nodes 1, 2 and 4 will be loaded.
-    $nodes = Node::loadMultiple(array(1, 2, 4));
+    $nodes = Node::loadMultiple([1, 2, 4]);
     $count = count($nodes);
-    $this->assertTrue(count($nodes) == 3, format_string('@count nodes loaded', array('@count' => $count)));
+    $this->assertTrue(count($nodes) == 3, format_string('@count nodes loaded', ['@count' => $count]));
     $this->assertTrue(isset($nodes[$node1->id()]), 'Node is correctly keyed in the array');
     $this->assertTrue(isset($nodes[$node2->id()]), 'Node is correctly keyed in the array');
     $this->assertTrue(isset($nodes[$node4->id()]), 'Node is correctly keyed in the array');
diff --git a/core/modules/node/tests/src/Functional/NodePostSettingsTest.php b/core/modules/node/tests/src/Functional/NodePostSettingsTest.php
index c59c42db934405e66bbb69097f7c8e41f5435134..9699261562854e6ae606cd75b6de0b168d77a8c8 100644
--- a/core/modules/node/tests/src/Functional/NodePostSettingsTest.php
+++ b/core/modules/node/tests/src/Functional/NodePostSettingsTest.php
@@ -13,7 +13,7 @@ class NodePostSettingsTest extends NodeTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $web_user = $this->drupalCreateUser(array('create page content', 'administer content types', 'access user profiles'));
+    $web_user = $this->drupalCreateUser(['create page content', 'administer content types', 'access user profiles']);
     $this->drupalLogin($web_user);
   }
 
@@ -23,35 +23,35 @@ protected function setUp() {
   function testPagePostInfo() {
 
     // Set "Basic page" content type to display post information.
-    $edit = array();
+    $edit = [];
     $edit['display_submitted'] = TRUE;
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
 
     // Create a node.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
 
     // Check that the post information is displayed.
     $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
-    $elements = $this->xpath('//div[contains(@class, :class)]', array(':class' => 'node__submitted'));
+    $elements = $this->xpath('//div[contains(@class, :class)]', [':class' => 'node__submitted']);
     $this->assertEqual(count($elements), 1, 'Post information is displayed.');
     $node->delete();
 
     // Set "Basic page" content type to display post information.
-    $edit = array();
+    $edit = [];
     $edit['display_submitted'] = FALSE;
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
 
     // Create a node.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
 
     // Check that the post information is displayed.
-    $elements = $this->xpath('//div[contains(@class, :class)]', array(':class' => 'node__submitted'));
+    $elements = $this->xpath('//div[contains(@class, :class)]', [':class' => 'node__submitted']);
     $this->assertEqual(count($elements), 0, 'Post information is not displayed.');
   }
 
diff --git a/core/modules/node/tests/src/Functional/NodeRSSContentTest.php b/core/modules/node/tests/src/Functional/NodeRSSContentTest.php
index de77927a78a1fe4529ff779b496fdda640b3e79d..2d154e29cffc8865cfaa38448d10d59f9047fc64 100644
--- a/core/modules/node/tests/src/Functional/NodeRSSContentTest.php
+++ b/core/modules/node/tests/src/Functional/NodeRSSContentTest.php
@@ -20,7 +20,7 @@ class NodeRSSContentTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_test', 'views');
+  public static $modules = ['node_test', 'views'];
 
   protected function setUp() {
     parent::setUp();
@@ -28,7 +28,7 @@ protected function setUp() {
     // Use bypass node access permission here, because the test class uses
     // hook_grants_alter() to deny access to everyone on node_access
     // queries.
-    $user = $this->drupalCreateUser(array('bypass node access', 'access content', 'create article content'));
+    $user = $this->drupalCreateUser(['bypass node access', 'access content', 'create article content']);
     $this->drupalLogin($user);
   }
 
@@ -37,21 +37,21 @@ protected function setUp() {
    */
   function testNodeRSSContent() {
     // Create a node.
-    $node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
+    $node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
 
     $this->drupalGet('rss.xml');
 
     // Check that content added in 'rss' view mode appear in RSS feed.
-    $rss_only_content = t('Extra data that should appear only in the RSS feed for node @nid.', array('@nid' => $node->id()));
+    $rss_only_content = t('Extra data that should appear only in the RSS feed for node @nid.', ['@nid' => $node->id()]);
     $this->assertText($rss_only_content, 'Node content designated for RSS appear in RSS feed.');
 
     // Check that content added in view modes other than 'rss' doesn't
     // appear in RSS feed.
-    $non_rss_content = t('Extra data that should appear everywhere except the RSS feed for node @nid.', array('@nid' => $node->id()));
+    $non_rss_content = t('Extra data that should appear everywhere except the RSS feed for node @nid.', ['@nid' => $node->id()]);
     $this->assertNoText($non_rss_content, 'Node content not designed for RSS does not appear in RSS feed.');
 
     // Check that extra RSS elements and namespaces are added to RSS feed.
-    $test_element = '<testElement>' . t('Value of testElement RSS element for node @nid.', array('@nid' => $node->id())) . '</testElement>';
+    $test_element = '<testElement>' . t('Value of testElement RSS element for node @nid.', ['@nid' => $node->id()]) . '</testElement>';
     $test_ns = 'xmlns:drupaltest="http://example.com/test-namespace"';
     $this->assertRaw($test_element, 'Extra RSS elements appear in RSS feed.');
     $this->assertRaw($test_ns, 'Extra namespaces appear in RSS feed.');
diff --git a/core/modules/node/tests/src/Functional/NodeRevisionsAllTest.php b/core/modules/node/tests/src/Functional/NodeRevisionsAllTest.php
index 9f3949ebcebdad5fc88cd905c3c8a81b43765a21..85d33cd684c3475f69cefdab205d2cba1424668d 100644
--- a/core/modules/node/tests/src/Functional/NodeRevisionsAllTest.php
+++ b/core/modules/node/tests/src/Functional/NodeRevisionsAllTest.php
@@ -20,13 +20,13 @@ protected function setUp() {
 
     // Create and log in user.
     $web_user = $this->drupalCreateUser(
-      array(
+      [
         'view page revisions',
         'revert page revisions',
         'delete page revisions',
         'edit any page content',
         'delete any page content'
-      )
+      ]
     );
     $this->drupalLogin($web_user);
 
@@ -36,8 +36,8 @@ protected function setUp() {
     $settings = get_object_vars($node);
     $settings['revision'] = 1;
 
-    $nodes = array();
-    $logs = array();
+    $nodes = [];
+    $logs = [];
 
     // Get the original node.
     $nodes[] = clone $node;
@@ -67,10 +67,10 @@ protected function setUp() {
   protected function createNodeRevision(NodeInterface $node) {
     // Create revision with a random title and body and update variables.
     $node->title = $this->randomMachineName();
-    $node->body = array(
+    $node->body = [
       'value' => $this->randomMachineName(32),
       'format' => filter_default_format(),
-    );
+    ];
     $node->setNewRevision();
     $node->save();
 
@@ -90,13 +90,13 @@ function testRevisions() {
 
     // Create and log in user.
     $content_admin = $this->drupalCreateUser(
-      array(
+      [
         'view all revisions',
         'revert all revisions',
         'delete all revisions',
         'edit any page content',
         'delete any page content'
-      )
+      ]
     );
     $this->drupalLogin($content_admin);
 
@@ -115,15 +115,15 @@ function testRevisions() {
     $this->assertTrue($node->isDefaultRevision(), 'Third node revision is the current one.');
 
     // Confirm that revisions revert properly.
-    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/revert", array(), t('Revert'));
+    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/revert", [], t('Revert'));
     $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.',
-      array(
+      [
         '@type' => 'Basic page',
         '%title' => $nodes[1]->getTitle(),
         '%revision-date' => format_date($nodes[1]->getRevisionCreationTime())
-      )),
+      ]),
       'Revision reverted.');
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $reverted_node = $node_storage->load($node->id());
     $this->assertTrue(($nodes[1]->body->value == $reverted_node->body->value), 'Node reverted correctly.');
 
@@ -132,16 +132,16 @@ function testRevisions() {
     $this->assertFalse($node->isDefaultRevision(), 'Third node revision is not the current one.');
 
     // Confirm revisions delete properly.
-    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/delete", array(), t('Delete'));
+    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/delete", [], t('Delete'));
     $this->assertRaw(t('Revision from %revision-date of @type %title has been deleted.',
-      array(
+      [
         '%revision-date' => format_date($nodes[1]->getRevisionCreationTime()),
         '@type' => 'Basic page',
         '%title' => $nodes[1]->getTitle(),
-      )),
+      ]),
       'Revision deleted.');
     $this->assertTrue(db_query('SELECT COUNT(vid) FROM {node_revision} WHERE nid = :nid and vid = :vid',
-      array(':nid' => $node->id(), ':vid' => $nodes[1]->getRevisionId()))->fetchField() == 0,
+      [':nid' => $node->id(), ':vid' => $nodes[1]->getRevisionId()])->fetchField() == 0,
       'Revision not found.');
 
     // Set the revision timestamp to an older date to make sure that the
@@ -149,16 +149,16 @@ function testRevisions() {
     $old_revision_date = REQUEST_TIME - 86400;
     db_update('node_revision')
       ->condition('vid', $nodes[2]->getRevisionId())
-      ->fields(array(
+      ->fields([
         'revision_timestamp' => $old_revision_date,
-      ))
+      ])
       ->execute();
-    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[2]->getRevisionId() . "/revert", array(), t('Revert'));
-    $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.', array(
+    $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[2]->getRevisionId() . "/revert", [], t('Revert'));
+    $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.', [
       '@type' => 'Basic page',
       '%title' => $nodes[2]->getTitle(),
       '%revision-date' => format_date($old_revision_date),
-    )));
+    ]));
 
     // Create 50 more revisions in order to trigger paging on the revisions
     // overview screen.
diff --git a/core/modules/node/tests/src/Functional/NodeRevisionsUiBypassAccessTest.php b/core/modules/node/tests/src/Functional/NodeRevisionsUiBypassAccessTest.php
index f2c750c36638d380c4e0c38abf15bfa6b997c32d..d1cbfb80d9f8a8c0f694ceeefebce4c910fcbd66 100644
--- a/core/modules/node/tests/src/Functional/NodeRevisionsUiBypassAccessTest.php
+++ b/core/modules/node/tests/src/Functional/NodeRevisionsUiBypassAccessTest.php
@@ -66,7 +66,7 @@ function testDisplayRevisionTab() {
     $this->assertFieldChecked('edit-revision', "'Create new revision' checkbox is checked");
 
     // Uncheck the create new revision checkbox and save the node.
-    $edit = array('revision' => FALSE);
+    $edit = ['revision' => FALSE];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, 'Save and keep published');
 
     $this->assertUrl($node->toUrl());
@@ -77,7 +77,7 @@ function testDisplayRevisionTab() {
     $this->assertFieldChecked('edit-revision', "'Create new revision' checkbox is checked");
 
     // Submit the form without changing the checkbox.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, 'Save and keep published');
 
     $this->assertUrl($node->toUrl());
diff --git a/core/modules/node/tests/src/Functional/NodeRevisionsUiTest.php b/core/modules/node/tests/src/Functional/NodeRevisionsUiTest.php
index 673a83685ac8de3463fea578dee26965ec31fca7..443f75f748876c30783fec16ad6b209496ffc528 100644
--- a/core/modules/node/tests/src/Functional/NodeRevisionsUiTest.php
+++ b/core/modules/node/tests/src/Functional/NodeRevisionsUiTest.php
@@ -54,11 +54,11 @@ function testNodeFormSaveWithoutRevision() {
     $this->assertFieldChecked('edit-revision', "'Create new revision' checkbox is checked");
 
     // Uncheck the create new revision checkbox and save the node.
-    $edit = array('revision' => FALSE);
+    $edit = ['revision' => FALSE];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
 
     // Load the node again and check the revision is the same as before.
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $node_revision = $node_storage->load($node->id(), TRUE);
     $this->assertEqual($node_revision->getRevisionId(), $node->getRevisionId(), "After an existing node is saved with 'Create new revision' unchecked, a new revision is not created.");
 
@@ -67,11 +67,11 @@ function testNodeFormSaveWithoutRevision() {
     $this->assertFieldChecked('edit-revision', "'Create new revision' checkbox is checked");
 
     // Submit the form without changing the checkbox.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
 
     // Load the node again and check the revision is different from before.
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $node_revision = $node_storage->load($node->id());
     $this->assertNotEqual($node_revision->getRevisionId(), $node->getRevisionId(), "After an existing node is saved with 'Create new revision' checked, a new revision is created.");
   }
diff --git a/core/modules/node/tests/src/Functional/NodeSaveTest.php b/core/modules/node/tests/src/Functional/NodeSaveTest.php
index 2d35ac029a9806ef6ae00b3165b76909eb94d095..9f57a5e8ae611dd43d388831ee22587a1ad26c31 100644
--- a/core/modules/node/tests/src/Functional/NodeSaveTest.php
+++ b/core/modules/node/tests/src/Functional/NodeSaveTest.php
@@ -23,13 +23,13 @@ class NodeSaveTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node_test');
+  public static $modules = ['node_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create a user that is allowed to post; we'll use this to test the submission.
-    $web_user = $this->drupalCreateUser(array('create article content'));
+    $web_user = $this->drupalCreateUser(['create article content']);
     $this->drupalLogin($web_user);
     $this->webUser = $web_user;
   }
@@ -51,13 +51,13 @@ function testImport() {
     $max_nid = reset($nids);
     $test_nid = $max_nid + mt_rand(1000, 1000000);
     $title = $this->randomMachineName(8);
-    $node = array(
+    $node = [
       'title' => $title,
-      'body' => array(array('value' => $this->randomMachineName(32))),
+      'body' => [['value' => $this->randomMachineName(32)]],
       'uid' => $this->webUser->id(),
       'type' => 'article',
       'nid' => $test_nid,
-    );
+    ];
     /** @var \Drupal\node\NodeInterface $node */
     $node = Node::create($node);
     $node->enforceIsNew();
@@ -78,11 +78,11 @@ function testImport() {
    */
   function testTimestamps() {
     // Use the default timestamps.
-    $edit = array(
+    $edit = [
       'uid' => $this->webUser->id(),
       'type' => 'article',
       'title' => $this->randomMachineName(8),
-    );
+    ];
 
     Node::create($edit)->save();
     $node = $this->drupalGetNodeByTitle($edit['title']);
@@ -105,13 +105,13 @@ function testTimestamps() {
     $this->assertEqual($node->getChangedTime(), 979534800, 'Saving a node uses "changed" timestamp set in presave hook.');
 
     // Programmatically set the timestamps on the node.
-    $edit = array(
+    $edit = [
       'uid' => $this->webUser->id(),
       'type' => 'article',
       'title' => $this->randomMachineName(8),
       'created' => 280299600, // Sun, 19 Nov 1978 05:00:00 GMT
       'changed' => 979534800, // Drupal 1.0 release.
-    );
+    ];
 
     Node::create($edit)->save();
     $node = $this->drupalGetNodeByTitle($edit['title']);
@@ -175,7 +175,7 @@ function testDeterminingChanges() {
   function testNodeSaveOnInsert() {
     // node_test_node_insert() triggers a save on insert if the title equals
     // 'new'.
-    $node = $this->drupalCreateNode(array('title' => 'new'));
+    $node = $this->drupalCreateNode(['title' => 'new']);
     $this->assertEqual($node->getTitle(), 'Node ' . $node->id(), 'Node saved on node insert.');
   }
 
diff --git a/core/modules/node/tests/src/Functional/NodeTemplateSuggestionsTest.php b/core/modules/node/tests/src/Functional/NodeTemplateSuggestionsTest.php
index 16dee4350d7e7a556045b5044a7a1d394bc6086a..7b99338b967ded133eaec9e5ab5592976e24de55 100644
--- a/core/modules/node/tests/src/Functional/NodeTemplateSuggestionsTest.php
+++ b/core/modules/node/tests/src/Functional/NodeTemplateSuggestionsTest.php
@@ -21,18 +21,18 @@ function testNodeThemeHookSuggestions() {
     $build = \Drupal::entityManager()->getViewBuilder('node')->view($node, $view_mode);
 
     $variables['elements'] = $build;
-    $suggestions = \Drupal::moduleHandler()->invokeAll('theme_suggestions_node', array($variables));
+    $suggestions = \Drupal::moduleHandler()->invokeAll('theme_suggestions_node', [$variables]);
 
-    $this->assertEqual($suggestions, array('node__full', 'node__page', 'node__page__full', 'node__' . $node->id(), 'node__' . $node->id() . '__full'), 'Found expected node suggestions.');
+    $this->assertEqual($suggestions, ['node__full', 'node__page', 'node__page__full', 'node__' . $node->id(), 'node__' . $node->id() . '__full'], 'Found expected node suggestions.');
 
     // Change the view mode.
     $view_mode = 'node.my_custom_view_mode';
     $build = \Drupal::entityManager()->getViewBuilder('node')->view($node, $view_mode);
 
     $variables['elements'] = $build;
-    $suggestions = \Drupal::moduleHandler()->invokeAll('theme_suggestions_node', array($variables));
+    $suggestions = \Drupal::moduleHandler()->invokeAll('theme_suggestions_node', [$variables]);
 
-    $this->assertEqual($suggestions, array('node__node_my_custom_view_mode', 'node__page', 'node__page__node_my_custom_view_mode', 'node__' . $node->id(), 'node__' . $node->id() . '__node_my_custom_view_mode'), 'Found expected node suggestions.');
+    $this->assertEqual($suggestions, ['node__node_my_custom_view_mode', 'node__page', 'node__page__node_my_custom_view_mode', 'node__' . $node->id(), 'node__' . $node->id() . '__node_my_custom_view_mode'], 'Found expected node suggestions.');
   }
 
 }
diff --git a/core/modules/node/tests/src/Functional/NodeTestBase.php b/core/modules/node/tests/src/Functional/NodeTestBase.php
index c3b269ecfe8ba50751b6d626e47590d72ba52cd5..2341b9eeb614bb2dd7fab3aab681a5c749c0d9cb 100644
--- a/core/modules/node/tests/src/Functional/NodeTestBase.php
+++ b/core/modules/node/tests/src/Functional/NodeTestBase.php
@@ -16,7 +16,7 @@ abstract class NodeTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'datetime');
+  public static $modules = ['node', 'datetime'];
 
   /**
    * The node access control handler.
@@ -33,12 +33,12 @@ protected function setUp() {
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array(
+      $this->drupalCreateContentType([
         'type' => 'page',
         'name' => 'Basic page',
         'display_submitted' => FALSE,
-      ));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      ]);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
     $this->accessHandler = \Drupal::entityManager()->getAccessControlHandler('node');
   }
@@ -76,9 +76,9 @@ function assertNodeAccess(array $ops, NodeInterface $node, AccountInterface $acc
    *   to check. If NULL, the untranslated (fallback) access is checked.
    */
   function assertNodeCreateAccess($bundle, $result, AccountInterface $account, $langcode = NULL) {
-    $this->assertEqual($result, $this->accessHandler->createAccess($bundle, $account, array(
+    $this->assertEqual($result, $this->accessHandler->createAccess($bundle, $account, [
       'langcode' => $langcode,
-    )), $this->nodeAccessAssertMessage('create', $result, $langcode));
+    ]), $this->nodeAccessAssertMessage('create', $result, $langcode));
   }
 
   /**
@@ -99,11 +99,11 @@ function assertNodeCreateAccess($bundle, $result, AccountInterface $account, $la
   function nodeAccessAssertMessage($operation, $result, $langcode = NULL) {
     return format_string(
       'Node access returns @result with operation %op, language code %langcode.',
-      array(
+      [
         '@result' => $result ? 'true' : 'false',
         '%op' => $operation,
         '%langcode' => !empty($langcode) ? $langcode : 'empty'
-      )
+      ]
     );
   }
 
diff --git a/core/modules/node/tests/src/Functional/NodeTypeInitialLanguageTest.php b/core/modules/node/tests/src/Functional/NodeTypeInitialLanguageTest.php
index c1ef6aec3f7fca91e83dc73f037d748bcfef594a..3295e2b20b1e4ed27878fe4754734d38638dfdc8 100644
--- a/core/modules/node/tests/src/Functional/NodeTypeInitialLanguageTest.php
+++ b/core/modules/node/tests/src/Functional/NodeTypeInitialLanguageTest.php
@@ -16,12 +16,12 @@ class NodeTypeInitialLanguageTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'field_ui');
+  public static $modules = ['language', 'field_ui'];
 
   protected function setUp() {
     parent::setUp();
 
-    $web_user = $this->drupalCreateUser(array('bypass node access', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer languages'));
+    $web_user = $this->drupalCreateUser(['bypass node access', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'administer languages']);
     $this->drupalLogin($web_user);
   }
 
@@ -45,20 +45,20 @@ function testNodeTypeInitialLanguageDefaults() {
     $this->assertNoField('langcode', 'Language is not selectable on node add/edit page by default.');
 
     // Adds a new language and set it as default.
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'hu',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
-    $edit = array(
+    $edit = [
       'site_default_language' => 'hu',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language', $edit, t('Save configuration'));
 
     // Tests the initial language after changing the site default language.
     // First unhide the language selector.
-    $edit = array(
+    $edit = [
       'language_configuration[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article', $edit, t('Save content type'));
     $this->drupalGet('node/add/article');
     $this->assertField('langcode[0][value]', 'Language is selectable on node add/edit page when language not hidden.');
@@ -78,9 +78,9 @@ function testNodeTypeInitialLanguageDefaults() {
     $this->assertOptionSelected('edit-fields-langcode-region', 'hidden', 'Language is hidden by default on manage display tab.');
 
     // Changes the initial language settings.
-    $edit = array(
+    $edit = [
       'language_configuration[langcode]' => 'en',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article', $edit, t('Save content type'));
     $this->drupalGet('node/add/article');
     $this->assertOptionSelected('edit-langcode-0-value', 'en', 'The initial language is the defined language.');
@@ -91,35 +91,35 @@ function testNodeTypeInitialLanguageDefaults() {
    */
   function testLanguageFieldVisibility() {
     // Creates a node to test Language field visibility feature.
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(8),
       'body[0][value]' => $this->randomMachineName(16),
-    );
+    ];
     $this->drupalPostForm('node/add/article', $edit, t('Save'));
     $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
     $this->assertTrue($node, 'Node found in database.');
 
     // Loads node page and check if Language field is hidden by default.
     $this->drupalGet('node/' . $node->id());
-    $language_field = $this->xpath('//div[@id=:id]/div', array(
+    $language_field = $this->xpath('//div[@id=:id]/div', [
       ':id' => 'field-language-display',
-    ));
+    ]);
     $this->assertTrue(empty($language_field), 'Language field value is not shown by default on node page.');
 
     // Configures Language field formatter and check if it is saved.
-    $edit = array(
+    $edit = [
       'fields[langcode][type]' => 'language',
       'fields[langcode][region]' => 'content',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/article/display', $edit, t('Save'));
     $this->drupalGet('admin/structure/types/manage/article/display');
     $this->assertOptionSelected('edit-fields-langcode-type', 'language', 'Language field has been set to visible.');
 
     // Loads node page and check if Language field is shown.
     $this->drupalGet('node/' . $node->id());
-    $language_field = $this->xpath('//div[@id=:id]/div', array(
+    $language_field = $this->xpath('//div[@id=:id]/div', [
       ':id' => 'field-language-display',
-    ));
+    ]);
     $this->assertFalse(empty($language_field), 'Language field value is shown on node page.');
   }
 
diff --git a/core/modules/node/tests/src/Functional/NodeTypeTranslationTest.php b/core/modules/node/tests/src/Functional/NodeTypeTranslationTest.php
index 067decaf93d58d366555c1daf3f183c6cdd034c9..07e61a036dd61998a33ff19f3c2ff524efa70f1e 100644
--- a/core/modules/node/tests/src/Functional/NodeTypeTranslationTest.php
+++ b/core/modules/node/tests/src/Functional/NodeTypeTranslationTest.php
@@ -22,12 +22,12 @@ class NodeTypeTranslationTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'block',
     'config_translation',
     'field_ui',
     'node',
-  );
+  ];
 
   /**
    * The default language code to use in this test.
@@ -53,14 +53,14 @@ class NodeTypeTranslationTest extends BrowserTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $admin_permissions = array(
+    $admin_permissions = [
       'administer content types',
       'administer node fields',
       'administer languages',
       'administer site configuration',
       'administer themes',
       'translate configuration',
-    );
+    ];
 
     // Create and log in user.
     $this->adminUser = $this->drupalCreateUser($admin_permissions);
@@ -93,31 +93,31 @@ public function testNodeTypeTranslation() {
     $type = Unicode::strtolower($this->randomMachineName(16));
     $name = $this->randomString();
     $this->drupalLogin($this->adminUser);
-    $this->drupalCreateContentType(array('type' => $type, 'name' => $name));
+    $this->drupalCreateContentType(['type' => $type, 'name' => $name]);
 
     // Translate the node type name.
     $langcode = $this->additionalLangcodes[0];
     $translated_name = $langcode . '-' . $name;
-    $edit = array(
+    $edit = [
       "translation[config_names][node.type.$type][name]" => $translated_name,
-    );
+    ];
 
     // Edit the title label to avoid having an exception when we save the translation.
     $this->drupalPostForm("admin/structure/types/manage/$type/translate/$langcode/add", $edit, t('Save translation'));
 
     // Check the name is translated without admin theme for editing.
-    $this->drupalPostForm('admin/appearance', array('use_admin_theme' => '0'), t('Save configuration'));
+    $this->drupalPostForm('admin/appearance', ['use_admin_theme' => '0'], t('Save configuration'));
     $this->drupalGet("$langcode/node/add/$type");
     // This is a Spanish page, so ensure the text asserted is translated in
     // Spanish and not French by adding the langcode option.
-    $this->assertRaw(t('Create @name', array('@name' => $translated_name), array('langcode' => $langcode)));
+    $this->assertRaw(t('Create @name', ['@name' => $translated_name], ['langcode' => $langcode]));
 
     // Check the name is translated with admin theme for editing.
-    $this->drupalPostForm('admin/appearance', array('use_admin_theme' => '1'), t('Save configuration'));
+    $this->drupalPostForm('admin/appearance', ['use_admin_theme' => '1'], t('Save configuration'));
     $this->drupalGet("$langcode/node/add/$type");
     // This is a Spanish page, so ensure the text asserted is translated in
     // Spanish and not French by adding the langcode option.
-    $this->assertRaw(t('Create @name', array('@name' => $translated_name), array('langcode' => $langcode)));
+    $this->assertRaw(t('Create @name', ['@name' => $translated_name], ['langcode' => $langcode]));
   }
 
   /**
@@ -127,18 +127,18 @@ public function testNodeTypeTitleLabelTranslation() {
     $type = Unicode::strtolower($this->randomMachineName(16));
     $name = $this->randomString();
     $this->drupalLogin($this->adminUser);
-    $this->drupalCreateContentType(array('type' => $type, 'name' => $name));
+    $this->drupalCreateContentType(['type' => $type, 'name' => $name]);
     $langcode = $this->additionalLangcodes[0];
 
     // Edit the title label for it to be displayed on the translation form.
-    $this->drupalPostForm("admin/structure/types/manage/$type", array('title_label' => 'Edited title'), t('Save content type'));
+    $this->drupalPostForm("admin/structure/types/manage/$type", ['title_label' => 'Edited title'], t('Save content type'));
 
     // Assert that the title label is displayed on the translation form with the right value.
     $this->drupalGet("admin/structure/types/manage/$type/translate/$langcode/add");
     $this->assertText('Edited title');
 
     // Translate the title label.
-    $this->drupalPostForm(NULL, array("translation[config_names][core.base_field_override.node.$type.title][label]" => 'Translated title'), t('Save translation'));
+    $this->drupalPostForm(NULL, ["translation[config_names][core.base_field_override.node.$type.title][label]" => 'Translated title'], t('Save translation'));
 
     // Assert that the right title label is displayed on the node add form. The
     // translations are created in this test; therefore, the assertions do not
@@ -150,23 +150,23 @@ public function testNodeTypeTitleLabelTranslation() {
     $this->assertText('Translated title');
 
     // Add an e-mail field.
-    $this->drupalPostForm("admin/structure/types/manage/$type/fields/add-field", array('new_storage_type' => 'email', 'label' => 'Email', 'field_name' => 'email'), 'Save and continue');
-    $this->drupalPostForm(NULL, array(), 'Save field settings');
-    $this->drupalPostForm(NULL, array(), 'Save settings');
+    $this->drupalPostForm("admin/structure/types/manage/$type/fields/add-field", ['new_storage_type' => 'email', 'label' => 'Email', 'field_name' => 'email'], 'Save and continue');
+    $this->drupalPostForm(NULL, [], 'Save field settings');
+    $this->drupalPostForm(NULL, [], 'Save settings');
 
     $type = Unicode::strtolower($this->randomMachineName(16));
     $name = $this->randomString();
-    $this->drupalCreateContentType(array('type' => $type, 'name' => $name));
+    $this->drupalCreateContentType(['type' => $type, 'name' => $name]);
 
     // Set tabs.
-    $this->drupalPlaceBlock('local_tasks_block', array('primary' => TRUE));
+    $this->drupalPlaceBlock('local_tasks_block', ['primary' => TRUE]);
 
     // Change default language.
-    $this->drupalPostForm('admin/config/regional/language', array('site_default_language' => 'es'), 'Save configuration');
+    $this->drupalPostForm('admin/config/regional/language', ['site_default_language' => 'es'], 'Save configuration');
 
     // Try re-using the email field.
     $this->drupalGet("es/admin/structure/types/manage/$type/fields/add-field");
-    $this->drupalPostForm(NULL, array('existing_storage_name' => 'field_email', 'existing_storage_label' => 'Email'), 'Save and continue');
+    $this->drupalPostForm(NULL, ['existing_storage_name' => 'field_email', 'existing_storage_label' => 'Email'], 'Save and continue');
     $this->assertResponse(200);
     $this->drupalGet("es/admin/structure/types/manage/$type/fields/node.$type.field_email/translate");
     $this->assertResponse(200);
diff --git a/core/modules/node/tests/src/Functional/NodeViewLanguageTest.php b/core/modules/node/tests/src/Functional/NodeViewLanguageTest.php
index 518d5fb6ef83ddd379a3141d2f5df53c0cbc471f..473042756012b0efc3b612a8ce493b3b1cb5af7d 100644
--- a/core/modules/node/tests/src/Functional/NodeViewLanguageTest.php
+++ b/core/modules/node/tests/src/Functional/NodeViewLanguageTest.php
@@ -16,7 +16,7 @@ class NodeViewLanguageTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'datetime', 'language');
+  public static $modules = ['node', 'datetime', 'language'];
 
   /**
    * Tests the language extra field display.
@@ -31,7 +31,7 @@ public function testViewLanguage() {
       ->save();
 
     // Create a node in Spanish.
-    $node = $this->drupalCreateNode(array('langcode' => 'es'));
+    $node = $this->drupalCreateNode(['langcode' => 'es']);
 
     $this->drupalGet($node->urlInfo());
     $this->assertText('Spanish', 'The language field is displayed properly.');
diff --git a/core/modules/node/tests/src/Functional/PageViewTest.php b/core/modules/node/tests/src/Functional/PageViewTest.php
index ec6dabaedc124c0027ac8c36436fffed53e3ae88..1c6231f7d2896e521e1b1fe93e0d1be5af2ab2a2 100644
--- a/core/modules/node/tests/src/Functional/PageViewTest.php
+++ b/core/modules/node/tests/src/Functional/PageViewTest.php
@@ -23,7 +23,7 @@ function testPageView() {
     $this->assertResponse(403);
 
     // Create a user without permission to edit node.
-    $web_user = $this->drupalCreateUser(array('access content'));
+    $web_user = $this->drupalCreateUser(['access content']);
     $this->drupalLogin($web_user);
 
     // Attempt to access edit page.
@@ -31,7 +31,7 @@ function testPageView() {
     $this->assertResponse(403);
 
     // Create user with permission to edit node.
-    $web_user = $this->drupalCreateUser(array('bypass node access'));
+    $web_user = $this->drupalCreateUser(['bypass node access']);
     $this->drupalLogin($web_user);
 
     // Attempt to access edit page.
diff --git a/core/modules/node/tests/src/Kernel/Config/NodeImportChangeTest.php b/core/modules/node/tests/src/Kernel/Config/NodeImportChangeTest.php
index edb9ae08d62af7cab6c8c6b9ea930773e0c4e8d0..e1b17f2c1c9a60e3ac90efe75d694f25bc06bd76 100644
--- a/core/modules/node/tests/src/Kernel/Config/NodeImportChangeTest.php
+++ b/core/modules/node/tests/src/Kernel/Config/NodeImportChangeTest.php
@@ -26,7 +26,7 @@ protected function setUp() {
     parent::setUp();
 
     // Set default storage backend.
-    $this->installConfig(array('field', 'node_test_config'));
+    $this->installConfig(['field', 'node_test_config']);
   }
 
   /**
diff --git a/core/modules/node/tests/src/Kernel/Config/NodeImportCreateTest.php b/core/modules/node/tests/src/Kernel/Config/NodeImportCreateTest.php
index f4fd1e198c18dbb80cc75c968988e9ea37387d2e..cb985173ae96c9eeeafe005a17b4e9f0abf1939c 100644
--- a/core/modules/node/tests/src/Kernel/Config/NodeImportCreateTest.php
+++ b/core/modules/node/tests/src/Kernel/Config/NodeImportCreateTest.php
@@ -18,7 +18,7 @@ class NodeImportCreateTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field', 'text', 'system', 'user');
+  public static $modules = ['node', 'field', 'text', 'system', 'user'];
 
   /**
    * Set the default field storage backend for fields created during tests.
@@ -28,7 +28,7 @@ protected function setUp() {
     $this->installEntitySchema('user');
 
     // Set default storage backend.
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
   }
 
   /**
@@ -42,7 +42,7 @@ public function testImportCreateDefault() {
 
     // Enable node_test_config module and check that the content type
     // shipped in the module's default config is created.
-    $this->container->get('module_installer')->install(array('node_test_config'));
+    $this->container->get('module_installer')->install(['node_test_config']);
     $node_type = NodeType::load($node_type_id);
     $this->assertTrue($node_type, 'The default content type was created.');
   }
diff --git a/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateNodeTest.php b/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateNodeTest.php
index 15b6d77ecd9c0fc30db367a0048ec3d2b414bdf0..1409648536af29234d961ac8ec386f0fec843317 100644
--- a/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateNodeTest.php
+++ b/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateNodeTest.php
@@ -172,11 +172,11 @@ public function testNode() {
     $this->assertIdentical('full_html', $node->body->format);
 
     // Now insert a row indicating a failure and set to update later.
-    $title = $this->rerunMigration(array(
+    $title = $this->rerunMigration([
       'sourceid1' => 2,
       'destid1' => NULL,
       'source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE,
-    ));
+    ]);
     $node = Node::load(2);
     $this->assertIdentical($title, $node->getTitle());
   }
@@ -194,10 +194,10 @@ protected function rerunMigration($new_row = []) {
     $title = $this->randomString();
     $source_connection = Database::getConnection('default', 'migrate');
     $source_connection->update('node_revisions')
-      ->fields(array(
+      ->fields([
         'title' => $title,
         'format' => 2,
-      ))
+      ])
       ->condition('vid', 3)
       ->execute();
     $migration = $this->getMigration('d6_node:story');
diff --git a/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateNodeTypeTest.php b/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateNodeTypeTest.php
index b9845625cce192374d1a8c63b1fe81a0c2070c89..c9cb341aae2c62bb78f51ac8d437058a22f7a320 100644
--- a/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateNodeTypeTest.php
+++ b/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateNodeTypeTest.php
@@ -33,7 +33,7 @@ public function testNodeType() {
     $this->assertIdentical(TRUE, $node_type_page->displaySubmitted());
     $this->assertIdentical(FALSE, $node_type_page->isNewRevision());
     $this->assertIdentical(DRUPAL_OPTIONAL, $node_type_page->getPreviewMode());
-    $this->assertIdentical($id_map->lookupDestinationID(array('test_page')), array('test_page'));
+    $this->assertIdentical($id_map->lookupDestinationID(['test_page']), ['test_page']);
 
     // Test we have a body field.
     $field = FieldConfig::loadByName('node', 'test_page', 'body');
@@ -46,7 +46,7 @@ public function testNodeType() {
     $this->assertIdentical(TRUE, $node_type_story->displaySubmitted());
     $this->assertIdentical(FALSE, $node_type_story->isNewRevision());
     $this->assertIdentical(DRUPAL_OPTIONAL, $node_type_story->getPreviewMode());
-    $this->assertIdentical($id_map->lookupDestinationID(array('test_story')), array('test_story'));
+    $this->assertIdentical($id_map->lookupDestinationID(['test_story']), ['test_story']);
 
     // Test we don't have a body field.
     $field = FieldConfig::loadByName('node', 'test_story', 'body');
@@ -59,7 +59,7 @@ public function testNodeType() {
     $this->assertIdentical(TRUE, $node_type_event->displaySubmitted());
     $this->assertIdentical(TRUE, $node_type_event->isNewRevision());
     $this->assertIdentical(DRUPAL_OPTIONAL, $node_type_event->getPreviewMode());
-    $this->assertIdentical($id_map->lookupDestinationID(array('test_event')), array('test_event'));
+    $this->assertIdentical($id_map->lookupDestinationID(['test_event']), ['test_event']);
 
     // Test we have a body field.
     $field = FieldConfig::loadByName('node', 'test_event', 'body');
diff --git a/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateViewModesTest.php b/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateViewModesTest.php
index 5e8eb0a671b88c601a9b1beaceb5448b1e78ef9a..f47559275cd81c7209fb2b46e405f513edaa1d39 100644
--- a/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateViewModesTest.php
+++ b/core/modules/node/tests/src/Kernel/Migrate/d6/MigrateViewModesTest.php
@@ -29,7 +29,7 @@ public function testViewModes() {
     $this->assertIdentical(FALSE, is_null($view_mode), 'Preview view mode loaded.');
     $this->assertIdentical('Preview', $view_mode->label(), 'View mode has correct label.');
     // Test the ID map.
-    $this->assertIdentical(array('node', 'preview'), $this->getMigration('d6_view_modes')->getIdMap()->lookupDestinationID(array(1)));
+    $this->assertIdentical(['node', 'preview'], $this->getMigration('d6_view_modes')->getIdMap()->lookupDestinationID([1]));
   }
 
 }
diff --git a/core/modules/node/tests/src/Kernel/Migrate/d7/MigrateNodeTest.php b/core/modules/node/tests/src/Kernel/Migrate/d7/MigrateNodeTest.php
index 8a962e77e5684f8aba66d26b81293c3ad378152c..f7855e8774da40b8a29288d376d72c77be85e3ea 100644
--- a/core/modules/node/tests/src/Kernel/Migrate/d7/MigrateNodeTest.php
+++ b/core/modules/node/tests/src/Kernel/Migrate/d7/MigrateNodeTest.php
@@ -16,7 +16,7 @@ class MigrateNodeTest extends MigrateDrupal7TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array(
+  public static $modules = [
     'content_translation',
     'comment',
     'datetime',
@@ -28,7 +28,7 @@ class MigrateNodeTest extends MigrateDrupal7TestBase {
     'taxonomy',
     'telephone',
     'text',
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/node/tests/src/Kernel/Migrate/d7/MigrateNodeTypeTest.php b/core/modules/node/tests/src/Kernel/Migrate/d7/MigrateNodeTypeTest.php
index 8b98ec3048c4d74376d322aba24aa9eb9857423e..549021f0ef6e74e0289a9df80e88c31d80b3ed8d 100644
--- a/core/modules/node/tests/src/Kernel/Migrate/d7/MigrateNodeTypeTest.php
+++ b/core/modules/node/tests/src/Kernel/Migrate/d7/MigrateNodeTypeTest.php
@@ -20,14 +20,14 @@ class MigrateNodeTypeTest extends MigrateDrupal7TestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'text', 'filter');
+  public static $modules = ['node', 'text', 'filter'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('node'));
+    $this->installConfig(['node']);
     $this->executeMigration('d7_node_type');
   }
 
diff --git a/core/modules/node/tests/src/Kernel/NodeAccessTest.php b/core/modules/node/tests/src/Kernel/NodeAccessTest.php
index b8e2251e62269346a5b419eaeb000c8693ef8dac..539edcb09b570ea0f10a61be0b96b1d8f9962ead 100644
--- a/core/modules/node/tests/src/Kernel/NodeAccessTest.php
+++ b/core/modules/node/tests/src/Kernel/NodeAccessTest.php
@@ -73,11 +73,11 @@ protected function setUp() {
     $this->drupalCreateUser();
 
     // Create a node type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'page',
       'name' => 'Basic page',
       'display_submitted' => FALSE,
-    ));
+    ]);
   }
 
   /**
diff --git a/core/modules/node/tests/src/Kernel/NodeBodyFieldStorageTest.php b/core/modules/node/tests/src/Kernel/NodeBodyFieldStorageTest.php
index 6c1faf3709434b4d243ea1fec2683a42043db5ea..3dd13496d65a5e8d087972e7be407b6e58d9ca7e 100644
--- a/core/modules/node/tests/src/Kernel/NodeBodyFieldStorageTest.php
+++ b/core/modules/node/tests/src/Kernel/NodeBodyFieldStorageTest.php
@@ -28,7 +28,7 @@ protected function setUp() {
     $this->installSchema('user', 'users_data');
     $this->installEntitySchema('user');
     $this->installEntitySchema('node');
-    $this->installConfig(array('field', 'node'));
+    $this->installConfig(['field', 'node']);
   }
 
   /**
@@ -46,7 +46,7 @@ public function testFieldOverrides() {
     $field->delete();
     $field_storage = FieldStorageConfig::loadByName('node', 'body');
     $this->assertTrue(count($field_storage->getBundles()) == 0, 'Node body field storage exists after deleting the only instance of a field.');
-    \Drupal::service('module_installer')->uninstall(array('node'));
+    \Drupal::service('module_installer')->uninstall(['node']);
     $field_storage = FieldStorageConfig::loadByName('node', 'body');
     $this->assertFalse($field_storage, 'Node body field storage does not exist after uninstalling the Node module.');
   }
diff --git a/core/modules/node/tests/src/Kernel/NodeConditionTest.php b/core/modules/node/tests/src/Kernel/NodeConditionTest.php
index 7636d52987647a426bb155fcabf474cad8e141c4..5bf7c731db82d19bfd7770525fe8a6ca4d6936cf 100644
--- a/core/modules/node/tests/src/Kernel/NodeConditionTest.php
+++ b/core/modules/node/tests/src/Kernel/NodeConditionTest.php
@@ -13,7 +13,7 @@
  */
 class NodeConditionTest extends EntityKernelTestBase {
 
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   protected function setUp() {
     parent::setUp();
@@ -45,20 +45,20 @@ function testConditions() {
     // Grab the node type condition and configure it to check against node type
     // of 'article' and set the context to the page type node.
     $condition = $manager->createInstance('node_type')
-      ->setConfig('bundles', array('article' => 'article'))
+      ->setConfig('bundles', ['article' => 'article'])
       ->setContextValue('node', $page);
     $this->assertFalse($condition->execute(), 'Page type nodes fail node type checks for articles.');
     // Check for the proper summary.
     $this->assertEqual('The node bundle is article', $condition->summary());
 
     // Set the node type check to page.
-    $condition->setConfig('bundles', array('page' => 'page'));
+    $condition->setConfig('bundles', ['page' => 'page']);
     $this->assertTrue($condition->execute(), 'Page type nodes pass node type checks for pages');
     // Check for the proper summary.
     $this->assertEqual('The node bundle is page', $condition->summary());
 
     // Set the node type check to page or article.
-    $condition->setConfig('bundles', array('page' => 'page', 'article' => 'article'));
+    $condition->setConfig('bundles', ['page' => 'page', 'article' => 'article']);
     $this->assertTrue($condition->execute(), 'Page type nodes pass node type checks for pages or articles');
     // Check for the proper summary.
     $this->assertEqual('The node bundle is page or article', $condition->summary());
@@ -72,11 +72,11 @@ function testConditions() {
     $this->assertFalse($condition->execute(), 'Test type nodes pass node type checks for pages or articles');
 
     // Check a greater than 2 bundles summary scenario.
-    $condition->setConfig('bundles', array('page' => 'page', 'article' => 'article', 'test' => 'test'));
+    $condition->setConfig('bundles', ['page' => 'page', 'article' => 'article', 'test' => 'test']);
     $this->assertEqual('The node bundle is page, article or test', $condition->summary());
 
     // Test Constructor injection.
-    $condition = $manager->createInstance('node_type', array('bundles' => array('article' => 'article'), 'context' => array('node' => $article)));
+    $condition = $manager->createInstance('node_type', ['bundles' => ['article' => 'article'], 'context' => ['node' => $article]]);
     $this->assertTrue($condition->execute(), 'Constructor injection of context and configuration working as anticipated.');
   }
 
diff --git a/core/modules/node/tests/src/Kernel/NodeFieldAccessTest.php b/core/modules/node/tests/src/Kernel/NodeFieldAccessTest.php
index f88e45e4aaf1a2419d50455a650492ce9a0f9eee..f57768e48df10e8846c8595499f1bb108e066e29 100644
--- a/core/modules/node/tests/src/Kernel/NodeFieldAccessTest.php
+++ b/core/modules/node/tests/src/Kernel/NodeFieldAccessTest.php
@@ -19,27 +19,27 @@ class NodeFieldAccessTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Fields that only users with administer nodes permissions can change.
    *
    * @var array
    */
-  protected $administrativeFields = array(
+  protected $administrativeFields = [
     'status',
     'promote',
     'sticky',
     'created',
     'uid',
-  );
+  ];
 
   /**
    * These fields are automatically managed and can not be changed by any user.
    *
    * @var array
    */
-  protected $readOnlyFields = array('changed', 'revision_uid', 'revision_timestamp');
+  protected $readOnlyFields = ['changed', 'revision_uid', 'revision_timestamp'];
 
   /**
    * Test permissions on nodes status field.
@@ -62,74 +62,74 @@ function testAccessToAdministrativeFields() {
 
     // An administrator user. No user exists yet, ensure that the first user
     // does not have UID 1.
-    $content_admin_user = $this->createUser(array('uid' => 2), array('administer nodes'));
+    $content_admin_user = $this->createUser(['uid' => 2], ['administer nodes']);
 
     // Two different editor users.
-    $page_creator_user = $this->createUser(array(), array('create page content', 'edit own page content', 'delete own page content'));
-    $page_manager_user = $this->createUser(array(), array('create page content', 'edit any page content', 'delete any page content'));
+    $page_creator_user = $this->createUser([], ['create page content', 'edit own page content', 'delete own page content']);
+    $page_manager_user = $this->createUser([], ['create page content', 'edit any page content', 'delete any page content']);
 
     // An unprivileged user.
-    $page_unrelated_user = $this->createUser(array(), array('access content'));
+    $page_unrelated_user = $this->createUser([], ['access content']);
 
     // List of all users
-    $test_users = array(
+    $test_users = [
       $content_admin_user,
       $page_creator_user,
       $page_manager_user,
       $page_unrelated_user,
-    );
+    ];
 
     // Create three "Basic pages". One is owned by our test-user
     // "page_creator", one by "page_manager", and one by someone else.
-    $node1 = Node::create(array(
+    $node1 = Node::create([
       'title' => $this->randomMachineName(8),
       'uid' => $page_creator_user->id(),
       'type' => 'page',
-    ));
-    $node2 = Node::create(array(
+    ]);
+    $node2 = Node::create([
       'title' => $this->randomMachineName(8),
       'uid' => $page_manager_user->id(),
       'type' => 'article',
-    ));
-    $node3 = Node::create(array(
+    ]);
+    $node3 = Node::create([
       'title' => $this->randomMachineName(8),
       'type' => 'page',
-    ));
+    ]);
 
     foreach ($this->administrativeFields as $field) {
 
       // Checks on view operations.
       foreach ($test_users as $account) {
         $may_view = $node1->{$field}->access('view', $account);
-        $this->assertTrue($may_view, SafeMarkup::format('Any user may view the field @name.', array('@name' => $field)));
+        $this->assertTrue($may_view, SafeMarkup::format('Any user may view the field @name.', ['@name' => $field]));
       }
 
       // Checks on edit operations.
       $may_update = $node1->{$field}->access('edit', $page_creator_user);
-      $this->assertFalse($may_update, SafeMarkup::format('Users with permission "edit own page content" is not allowed to the field @name.', array('@name' => $field)));
+      $this->assertFalse($may_update, SafeMarkup::format('Users with permission "edit own page content" is not allowed to the field @name.', ['@name' => $field]));
       $may_update = $node2->{$field}->access('edit', $page_creator_user);
-      $this->assertFalse($may_update, SafeMarkup::format('Users with permission "edit own page content" is not allowed to the field @name.', array('@name' => $field)));
+      $this->assertFalse($may_update, SafeMarkup::format('Users with permission "edit own page content" is not allowed to the field @name.', ['@name' => $field]));
       $may_update = $node2->{$field}->access('edit', $page_manager_user);
-      $this->assertFalse($may_update, SafeMarkup::format('Users with permission "edit any page content" is not allowed to the field @name.', array('@name' => $field)));
+      $this->assertFalse($may_update, SafeMarkup::format('Users with permission "edit any page content" is not allowed to the field @name.', ['@name' => $field]));
       $may_update = $node1->{$field}->access('edit', $page_manager_user);
-      $this->assertFalse($may_update, SafeMarkup::format('Users with permission "edit any page content" is not allowed to the field @name.', array('@name' => $field)));
+      $this->assertFalse($may_update, SafeMarkup::format('Users with permission "edit any page content" is not allowed to the field @name.', ['@name' => $field]));
       $may_update = $node2->{$field}->access('edit', $page_unrelated_user);
-      $this->assertFalse($may_update, SafeMarkup::format('Users not having permission "edit any page content" is not allowed to the field @name.', array('@name' => $field)));
+      $this->assertFalse($may_update, SafeMarkup::format('Users not having permission "edit any page content" is not allowed to the field @name.', ['@name' => $field]));
       $may_update = $node1->{$field}->access('edit', $content_admin_user) && $node3->status->access('edit', $content_admin_user);
-      $this->assertTrue($may_update, SafeMarkup::format('Users with permission "administer nodes" may edit @name fields on all nodes.', array('@name' => $field)));
+      $this->assertTrue($may_update, SafeMarkup::format('Users with permission "administer nodes" may edit @name fields on all nodes.', ['@name' => $field]));
     }
 
     foreach ($this->readOnlyFields as $field) {
       // Check view operation.
       foreach ($test_users as $account) {
         $may_view = $node1->{$field}->access('view', $account);
-        $this->assertTrue($may_view, SafeMarkup::format('Any user may view the field @name.', array('@name' => $field)));
+        $this->assertTrue($may_view, SafeMarkup::format('Any user may view the field @name.', ['@name' => $field]));
       }
 
       // Check edit operation.
       foreach ($test_users as $account) {
         $may_view = $node1->{$field}->access('edit', $account);
-        $this->assertFalse($may_view, SafeMarkup::format('No user is not allowed to edit the field @name.', array('@name' => $field)));
+        $this->assertFalse($may_view, SafeMarkup::format('No user is not allowed to edit the field @name.', ['@name' => $field]));
       }
     }
 
diff --git a/core/modules/node/tests/src/Kernel/NodeFieldOverridesTest.php b/core/modules/node/tests/src/Kernel/NodeFieldOverridesTest.php
index aee02728ec884da87c831c1904b1789e4352ed6c..7c7bc03348846276e714f0ee6aa52e7b9def7610 100644
--- a/core/modules/node/tests/src/Kernel/NodeFieldOverridesTest.php
+++ b/core/modules/node/tests/src/Kernel/NodeFieldOverridesTest.php
@@ -27,14 +27,14 @@ class NodeFieldOverridesTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'system', 'field', 'node');
+  public static $modules = ['user', 'system', 'field', 'node'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('user'));
+    $this->installConfig(['user']);
     $this->user = $this->createUser();
     \Drupal::service('current_user')->setAccount($this->user);
   }
diff --git a/core/modules/node/tests/src/Kernel/NodeOwnerTest.php b/core/modules/node/tests/src/Kernel/NodeOwnerTest.php
index d21d5ad046d78c4a93fc695eb4c5b1f918c7920a..c12f3115c1601e4b755064af156296e097c3f1cf 100644
--- a/core/modules/node/tests/src/Kernel/NodeOwnerTest.php
+++ b/core/modules/node/tests/src/Kernel/NodeOwnerTest.php
@@ -19,16 +19,16 @@ class NodeOwnerTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'language');
+  public static $modules = ['node', 'language'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create the node bundles required for testing.
-    $type = NodeType::create(array(
+    $type = NodeType::create([
       'type' => 'page',
       'name' => 'page',
-    ));
+    ]);
     $type->save();
 
     // Enable two additional languages.
@@ -48,11 +48,11 @@ public function testOwner() {
     $container->get('current_user')->setAccount($user);
 
     // Create a test node.
-    $english = Node::create(array(
+    $english = Node::create([
       'type' => 'page',
       'title' => $this->randomMachineName(),
       'language' => 'en',
-    ));
+    ]);
     $english->save();
 
     $this->assertEqual($user->id(), $english->getOwnerId());
diff --git a/core/modules/node/tests/src/Kernel/NodeTokenReplaceTest.php b/core/modules/node/tests/src/Kernel/NodeTokenReplaceTest.php
index c496c83b29203f6e1286ec253d5a0faf4aa71309..829bf4d4f075253023bf5e3969f50a362d491b61 100644
--- a/core/modules/node/tests/src/Kernel/NodeTokenReplaceTest.php
+++ b/core/modules/node/tests/src/Kernel/NodeTokenReplaceTest.php
@@ -22,14 +22,14 @@ class NodeTokenReplaceTest extends TokenReplaceKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'filter');
+  public static $modules = ['node', 'filter'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('filter', 'node'));
+    $this->installConfig(['filter', 'node']);
 
     $node_type = NodeType::create(['type' => 'article', 'name' => 'Article']);
     $node_type->save();
@@ -40,10 +40,10 @@ protected function setUp() {
    * Creates a node, then tests the tokens generated from it.
    */
   function testNodeTokenReplacement() {
-    $url_options = array(
+    $url_options = [
       'absolute' => TRUE,
       'language' => $this->interfaceLanguage,
-    );
+    ];
 
     // Create a user and a node.
     $account = $this->createUser();
@@ -58,7 +58,7 @@ function testNodeTokenReplacement() {
     $node->save();
 
     // Generate and test tokens.
-    $tests = array();
+    $tests = [];
     $tests['[node:nid]'] = $node->id();
     $tests['[node:vid]'] = $node->getRevisionId();
     $tests['[node:type]'] = 'article';
@@ -72,8 +72,8 @@ function testNodeTokenReplacement() {
     $tests['[node:author]'] = $account->getUsername();
     $tests['[node:author:uid]'] = $node->getOwnerId();
     $tests['[node:author:name]'] = $account->getUsername();
-    $tests['[node:created:since]'] = \Drupal::service('date.formatter')->formatTimeDiffSince($node->getCreatedTime(), array('langcode' => $this->interfaceLanguage->getId()));
-    $tests['[node:changed:since]'] = \Drupal::service('date.formatter')->formatTimeDiffSince($node->getChangedTime(), array('langcode' => $this->interfaceLanguage->getId()));
+    $tests['[node:created:since]'] = \Drupal::service('date.formatter')->formatTimeDiffSince($node->getCreatedTime(), ['langcode' => $this->interfaceLanguage->getId()]);
+    $tests['[node:changed:since]'] = \Drupal::service('date.formatter')->formatTimeDiffSince($node->getChangedTime(), ['langcode' => $this->interfaceLanguage->getId()]);
 
     $base_bubbleable_metadata = BubbleableMetadata::createFromObject($node);
 
@@ -101,7 +101,7 @@ function testNodeTokenReplacement() {
 
     foreach ($tests as $input => $expected) {
       $bubbleable_metadata = new BubbleableMetadata();
-      $output = $this->tokenService->replace($input, array('node' => $node), array('langcode' => $this->interfaceLanguage->getId()), $bubbleable_metadata);
+      $output = $this->tokenService->replace($input, ['node' => $node], ['langcode' => $this->interfaceLanguage->getId()], $bubbleable_metadata);
       $this->assertEqual($output, $expected, format_string('Node token %token replaced.', ['%token' => $input]));
       $this->assertEqual($bubbleable_metadata, $metadata_tests[$input]);
     }
@@ -116,14 +116,14 @@ function testNodeTokenReplacement() {
     $node->save();
 
     // Generate and test token - use full body as expected value.
-    $tests = array();
+    $tests = [];
     $tests['[node:summary]'] = $node->body->processed;
 
     // Test to make sure that we generated something for each token.
     $this->assertFalse(in_array(0, array_map('strlen', $tests)), 'No empty tokens generated for node without a summary.');
 
     foreach ($tests as $input => $expected) {
-      $output = $this->tokenService->replace($input, array('node' => $node), array('language' => $this->interfaceLanguage));
+      $output = $this->tokenService->replace($input, ['node' => $node], ['language' => $this->interfaceLanguage]);
       $this->assertEqual($output, $expected, new FormattableMarkup('Node token %token replaced for node without a summary.', ['%token' => $input]));
     }
   }
diff --git a/core/modules/node/tests/src/Kernel/NodeValidationTest.php b/core/modules/node/tests/src/Kernel/NodeValidationTest.php
index 9fd646e61a9dde19ceeecaa062f2ed2b8fcedbeb..e111faeaef70d1bbcc9461e10038f3b7cbc7398f 100644
--- a/core/modules/node/tests/src/Kernel/NodeValidationTest.php
+++ b/core/modules/node/tests/src/Kernel/NodeValidationTest.php
@@ -18,7 +18,7 @@ class NodeValidationTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Set the default field storage backend for fields created during tests.
diff --git a/core/modules/node/tests/src/Unit/Plugin/views/field/NodeBulkFormTest.php b/core/modules/node/tests/src/Unit/Plugin/views/field/NodeBulkFormTest.php
index 6b28409e92d9e85042460b3ea8180c6891062ef2..eb92f8cb0a955d21cf034d4c00db97aef5556383 100644
--- a/core/modules/node/tests/src/Unit/Plugin/views/field/NodeBulkFormTest.php
+++ b/core/modules/node/tests/src/Unit/Plugin/views/field/NodeBulkFormTest.php
@@ -25,7 +25,7 @@ protected function tearDown() {
    * Tests the constructor assignment of actions.
    */
   public function testConstructor() {
-    $actions = array();
+    $actions = [];
 
     for ($i = 1; $i <= 2; $i++) {
       $action = $this->getMock('\Drupal\system\ActionConfigEntityInterface');
@@ -60,7 +60,7 @@ public function testConstructor() {
     $views_data->expects($this->any())
       ->method('get')
       ->with('node')
-      ->will($this->returnValue(array('table' => array('entity type' => 'node'))));
+      ->will($this->returnValue(['table' => ['entity type' => 'node']]));
     $container = new ContainerBuilder();
     $container->set('views.views_data', $views_data);
     $container->set('string_translation', $this->getStringTranslationStub());
@@ -82,9 +82,9 @@ public function testConstructor() {
       ->getMock();
 
     $definition['title'] = '';
-    $options = array();
+    $options = [];
 
-    $node_bulk_form = new NodeBulkForm(array(), 'node_bulk_form', $definition, $entity_manager, $language_manager);
+    $node_bulk_form = new NodeBulkForm([], 'node_bulk_form', $definition, $entity_manager, $language_manager);
     $node_bulk_form->init($executable, $display, $options);
 
     $this->assertAttributeEquals(array_slice($actions, 0, -1, TRUE), 'actions', $node_bulk_form);
diff --git a/core/modules/options/options.api.php b/core/modules/options/options.api.php
index 28ac77114ed371d4e9159e9029f94cf0221e9715..0f52b2befa9e12a46fe411d1cbe5397c4164fd2d 100644
--- a/core/modules/options/options.api.php
+++ b/core/modules/options/options.api.php
@@ -81,21 +81,21 @@ function hook_options_list_alter(array &$options, array $context) {
  */
 function callback_allowed_values_function(FieldStorageDefinitionInterface $definition, FieldableEntityInterface $entity = NULL, &$cacheable = TRUE) {
   if (isset($entity) && ($entity->bundle() == 'not_a_programmer')) {
-    $values = array(
+    $values = [
       1 => 'One',
       2 => 'Two',
-    );
+    ];
   }
   else {
-    $values = array(
-      'Group 1' => array(
+    $values = [
+      'Group 1' => [
         0 => 'Zero',
         1 => 'One',
-      ),
-      'Group 2' => array(
+      ],
+      'Group 2' => [
         2 => 'Two',
-      ),
-    );
+      ],
+    ];
   }
 
   return $values;
diff --git a/core/modules/options/options.module b/core/modules/options/options.module
index 2041607654ef2023e5fb212e03ee9cb12b5c6994..7cf36355293dd735fb1ef33dd9636779afef0136 100644
--- a/core/modules/options/options.module
+++ b/core/modules/options/options.module
@@ -19,11 +19,11 @@ function options_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.options':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Options module allows you to create fields where data values are selected from a fixed list of options. Usually these items are entered through a select list, checkboxes, or radio buttons. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":options_do">online documentation for the Options module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':options_do' => 'https://www.drupal.org/documentation/modules/options')) . '</p>';
+      $output .= '<p>' . t('The Options module allows you to create fields where data values are selected from a fixed list of options. Usually these items are entered through a select list, checkboxes, or radio buttons. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":options_do">online documentation for the Options module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':options_do' => 'https://www.drupal.org/documentation/modules/options']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing and displaying list fields') . '</dt>';
-      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the list fields can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the list fields can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Defining option keys and labels') . '</dt>';
       $output .= '<dd>' . t('When you define the list options you can define a key and a label for each option in the list. The label will be shown to the users while the key gets stored in the database.') . '</dd>';
       $output .= '<dt>' . t('Choosing list field type') . '</dt>';
@@ -70,9 +70,9 @@ function options_field_storage_config_delete(FieldStorageConfigInterface $field_
  * @see callback_allowed_values_function()
  */
 function options_allowed_values(FieldStorageDefinitionInterface $definition, FieldableEntityInterface $entity = NULL) {
-  $allowed_values = &drupal_static(__FUNCTION__, array());
+  $allowed_values = &drupal_static(__FUNCTION__, []);
 
-  $cache_keys = array($definition->getTargetEntityTypeId(), $definition->getName());
+  $cache_keys = [$definition->getTargetEntityTypeId(), $definition->getName()];
   if ($entity) {
     $cache_keys[] = 'entity';
   }
@@ -112,7 +112,7 @@ function options_field_storage_config_update_forbid(FieldStorageConfigInterface
     $prior_allowed_values = $prior_field_storage->getSetting('allowed_values');
     $lost_keys = array_keys(array_diff_key($prior_allowed_values, $allowed_values));
     if (_options_values_in_use($field_storage->getTargetEntityTypeId(), $field_storage->getName(), $lost_keys)) {
-      throw new FieldStorageDefinitionUpdateForbiddenException(t('A list field (@field_name) with existing data cannot have its keys changed.', array('@field_name' => $field_storage->getName())));
+      throw new FieldStorageDefinitionUpdateForbiddenException(t('A list field (@field_name) with existing data cannot have its keys changed.', ['@field_name' => $field_storage->getName()]));
     }
   }
 }
diff --git a/core/modules/options/src/Plugin/Field/FieldFormatter/OptionsDefaultFormatter.php b/core/modules/options/src/Plugin/Field/FieldFormatter/OptionsDefaultFormatter.php
index bc1dba19c2906ad3f130f86d6931d2bee69ff622..ba1ba9c2b3c3eb1862fe6a01bc42b9e7fce1f402 100644
--- a/core/modules/options/src/Plugin/Field/FieldFormatter/OptionsDefaultFormatter.php
+++ b/core/modules/options/src/Plugin/Field/FieldFormatter/OptionsDefaultFormatter.php
@@ -29,7 +29,7 @@ class OptionsDefaultFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     // Only collect allowed options if there are actually items to display.
     if ($items->count()) {
@@ -44,10 +44,10 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
         // If the stored value is in the current set of allowed values, display
         // the associated label, otherwise just display the raw value.
         $output = isset($options[$value]) ? $options[$value] : $value;
-        $elements[$delta] = array(
+        $elements[$delta] = [
           '#markup' => $output,
           '#allowed_tags' => FieldFilteredMarkup::allowedTags(),
-        );
+        ];
       }
     }
 
diff --git a/core/modules/options/src/Plugin/Field/FieldFormatter/OptionsKeyFormatter.php b/core/modules/options/src/Plugin/Field/FieldFormatter/OptionsKeyFormatter.php
index 2b83b15066c14836be26978705b5ff360029250a..64f22e9b442e98b3fc4acfce2bdb4051a3997743 100644
--- a/core/modules/options/src/Plugin/Field/FieldFormatter/OptionsKeyFormatter.php
+++ b/core/modules/options/src/Plugin/Field/FieldFormatter/OptionsKeyFormatter.php
@@ -28,13 +28,13 @@ class OptionsKeyFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($items as $delta => $item) {
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#markup' => $item->value,
         '#allowed_tags' => FieldFilteredMarkup::allowedTags(),
-      );
+      ];
     }
 
     return $elements;
diff --git a/core/modules/options/src/Plugin/Field/FieldType/ListFloatItem.php b/core/modules/options/src/Plugin/Field/FieldType/ListFloatItem.php
index 254207d5eb4c61ce95b035f9041803516570b29e..416f7dc2ec61465d0c1a72a9d2ce710f72d19645 100644
--- a/core/modules/options/src/Plugin/Field/FieldType/ListFloatItem.php
+++ b/core/modules/options/src/Plugin/Field/FieldType/ListFloatItem.php
@@ -34,16 +34,16 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'float',
-        ),
-      ),
-      'indexes' => array(
-        'value' => array('value'),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'value' => ['value'],
+      ],
+    ];
   }
 
   /**
@@ -55,7 +55,7 @@ protected function allowedValuesDescription() {
     $description .= '<br/>' . t('The label is optional: if a line contains a single number, it will be used as key and label.');
     $description .= '<br/>' . t('Lists of labels are also accepted (one label per line), only if the field does not hold any values yet. Numeric keys will be automatically generated from the positions in the list.');
     $description .= '</p>';
-    $description .= '<p>' . t('Allowed HTML tags in labels: @tags', array('@tags' => $this->displayAllowedTags())) . '</p>';
+    $description .= '<p>' . t('Allowed HTML tags in labels: @tags', ['@tags' => $this->displayAllowedTags()]) . '</p>';
     return $description;
   }
 
@@ -90,7 +90,7 @@ protected static function validateAllowedValue($option) {
    * {@inheritdoc}
    */
   public static function simplifyAllowedValues(array $structured_values) {
-    $values = array();
+    $values = [];
     foreach ($structured_values as $item) {
       // Nested elements are embedded in the label.
       if (is_array($item['label'])) {
diff --git a/core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php b/core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php
index 719ae487153fd0f3e6f831f0e8621eb3607df5c3..b8a4204806b868ee6bc082592565132b5e8dcaf6 100644
--- a/core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php
+++ b/core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php
@@ -34,16 +34,16 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'int',
-        ),
-      ),
-      'indexes' => array(
-        'value' => array('value'),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'value' => ['value'],
+      ],
+    ];
   }
 
   /**
@@ -55,7 +55,7 @@ protected function allowedValuesDescription() {
     $description .= '<br/>' . t('The label is optional: if a line contains a single number, it will be used as key and label.');
     $description .= '<br/>' . t('Lists of labels are also accepted (one label per line), only if the field does not hold any values yet. Numeric keys will be automatically generated from the positions in the list.');
     $description .= '</p>';
-    $description .= '<p>' . t('Allowed HTML tags in labels: @tags', array('@tags' => $this->displayAllowedTags())) . '</p>';
+    $description .= '<p>' . t('Allowed HTML tags in labels: @tags', ['@tags' => $this->displayAllowedTags()]) . '</p>';
     return $description;
   }
 
diff --git a/core/modules/options/src/Plugin/Field/FieldType/ListItemBase.php b/core/modules/options/src/Plugin/Field/FieldType/ListItemBase.php
index 4527ca361ca5b95075d50a7e6445a50e1bfa22ba..c7c2b16e9b53acf8399daa040ebe37c2603b75a5 100644
--- a/core/modules/options/src/Plugin/Field/FieldType/ListItemBase.php
+++ b/core/modules/options/src/Plugin/Field/FieldType/ListItemBase.php
@@ -21,10 +21,10 @@ abstract class ListItemBase extends FieldItemBase implements OptionsProviderInte
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
-      'allowed_values' => array(),
+    return [
+      'allowed_values' => [],
       'allowed_values_function' => '',
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
@@ -85,28 +85,28 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
     $allowed_values = $this->getSetting('allowed_values');
     $allowed_values_function = $this->getSetting('allowed_values_function');
 
-    $element['allowed_values'] = array(
+    $element['allowed_values'] = [
       '#type' => 'textarea',
       '#title' => t('Allowed values list'),
       '#default_value' => $this->allowedValuesString($allowed_values),
       '#rows' => 10,
       '#access' => empty($allowed_values_function),
-      '#element_validate' => array(array(get_class($this), 'validateAllowedValues')),
+      '#element_validate' => [[get_class($this), 'validateAllowedValues']],
       '#field_has_data' => $has_data,
       '#field_name' => $this->getFieldDefinition()->getName(),
       '#entity_type' => $this->getEntity()->getEntityTypeId(),
       '#allowed_values' => $allowed_values,
-    );
+    ];
 
     $element['allowed_values']['#description'] = $this->allowedValuesDescription();
 
-    $element['allowed_values_function'] = array(
+    $element['allowed_values_function'] = [
       '#type' => 'item',
       '#title' => t('Allowed values list'),
-      '#markup' => t('The value of this field is being determined by the %function function and may not be changed.', array('%function' => $allowed_values_function)),
+      '#markup' => t('The value of this field is being determined by the %function function and may not be changed.', ['%function' => $allowed_values_function]),
       '#access' => !empty($allowed_values_function),
       '#value' => $allowed_values_function,
-    );
+    ];
 
     return $element;
   }
@@ -171,7 +171,7 @@ public static function validateAllowedValues($element, FormStateInterface $form_
    * @see \Drupal\options\Plugin\Field\FieldType\ListItemBase::allowedValuesString()
    */
   protected static function extractAllowedValues($string, $has_data) {
-    $values = array();
+    $values = [];
 
     $list = explode("\n", $string);
     $list = array_map('trim', $list);
@@ -180,7 +180,7 @@ protected static function extractAllowedValues($string, $has_data) {
     $generated_keys = $explicit_keys = FALSE;
     foreach ($list as $position => $text) {
       // Check for an explicit key.
-      $matches = array();
+      $matches = [];
       if (preg_match('/(.*)\|(.*)/', $text, $matches)) {
         // Trim key and value to avoid unwanted spaces issues.
         $key = trim($matches[1]);
@@ -239,7 +239,7 @@ protected static function validateAllowedValue($option) { }
    *    - Each value is in the format "value|label" or "value".
    */
   protected function allowedValuesString($values) {
-    $lines = array();
+    $lines = [];
     foreach ($values as $key => $value) {
       $lines[] = "$key|$value";
     }
@@ -280,7 +280,7 @@ public static function storageSettingsFromConfigData(array $settings) {
    * @see \Drupal\options\Plugin\Field\FieldType\ListItemBase::structureAllowedValues()
    */
   protected static function simplifyAllowedValues(array $structured_values) {
-    $values = array();
+    $values = [];
     foreach ($structured_values as $item) {
       if (is_array($item['label'])) {
         // Nested elements are embedded in the label.
@@ -305,15 +305,15 @@ protected static function simplifyAllowedValues(array $structured_values) {
    * @see \Drupal\options\Plugin\Field\FieldType\ListItemBase::simplifyAllowedValues()
    */
   protected static function structureAllowedValues(array $values) {
-    $structured_values = array();
+    $structured_values = [];
     foreach ($values as $value => $label) {
       if (is_array($label)) {
         $label = static::structureAllowedValues($label);
       }
-      $structured_values[] = array(
+      $structured_values[] = [
         'value' => static::castAllowedValue($value),
         'label' => $label,
-      );
+      ];
     }
     return $structured_values;
   }
diff --git a/core/modules/options/src/Plugin/Field/FieldType/ListStringItem.php b/core/modules/options/src/Plugin/Field/FieldType/ListStringItem.php
index f5440ab312e7e8dadbc2a113990bf9da92944ea5..1f8caeaf36174217f833bae5e9d36849e75db3f1 100644
--- a/core/modules/options/src/Plugin/Field/FieldType/ListStringItem.php
+++ b/core/modules/options/src/Plugin/Field/FieldType/ListStringItem.php
@@ -26,7 +26,7 @@ class ListStringItem extends ListItemBase {
   public static function propertyDefinitions(FieldStorageDefinitionInterface $field_definition) {
     $properties['value'] = DataDefinition::create('string')
       ->setLabel(t('Text value'))
-      ->addConstraint('Length', array('max' => 255))
+      ->addConstraint('Length', ['max' => 255])
       ->setRequired(TRUE);
 
     return $properties;
@@ -36,17 +36,17 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => 255,
-        ),
-      ),
-      'indexes' => array(
-        'value' => array('value'),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'value' => ['value'],
+      ],
+    ];
   }
 
   /**
@@ -57,7 +57,7 @@ protected function allowedValuesDescription() {
     $description .= '<br/>' . t('The key is the stored value. The label will be used in displayed values and edit forms.');
     $description .= '<br/>' . t('The label is optional: if a line contains a single string, it will be used as key and label.');
     $description .= '</p>';
-    $description .= '<p>' . t('Allowed HTML tags in labels: @tags', array('@tags' => $this->displayAllowedTags())) . '</p>';
+    $description .= '<p>' . t('Allowed HTML tags in labels: @tags', ['@tags' => $this->displayAllowedTags()]) . '</p>';
     return $description;
   }
 
diff --git a/core/modules/options/src/Tests/OptionsDynamicValuesApiTest.php b/core/modules/options/src/Tests/OptionsDynamicValuesApiTest.php
index 081696a696eded17b0548d15f182b99f5b640c13..c4215835fd6d867062abc797fcabd530eb97b454 100644
--- a/core/modules/options/src/Tests/OptionsDynamicValuesApiTest.php
+++ b/core/modules/options/src/Tests/OptionsDynamicValuesApiTest.php
@@ -21,12 +21,12 @@ public function testOptionsAllowedValues() {
 
     $values = options_allowed_values($this->fieldStorage, $this->entity);
 
-    $expected_values = array(
+    $expected_values = [
       $this->entity->label(),
       $this->entity->url(),
       $this->entity->uuid(),
       $this->entity->bundle(),
-    );
+    ];
     $expected_values = array_combine($expected_values, $expected_values);
     $this->assertEqual($expected_values, $values);
   }
diff --git a/core/modules/options/src/Tests/OptionsFieldUITest.php b/core/modules/options/src/Tests/OptionsFieldUITest.php
index ee6cf2ef77a97e791ea3aae64732056b26b6793f..76e076e5867a87decca9251ae2d06f136f6e3319 100644
--- a/core/modules/options/src/Tests/OptionsFieldUITest.php
+++ b/core/modules/options/src/Tests/OptionsFieldUITest.php
@@ -18,7 +18,7 @@ class OptionsFieldUITest extends FieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'options', 'field_test', 'taxonomy', 'field_ui');
+  public static $modules = ['node', 'options', 'field_test', 'taxonomy', 'field_ui'];
 
   /**
    * The name of the created content type.
@@ -70,15 +70,15 @@ function testOptionsAllowedValuesInteger() {
 
     // Flat list of textual values.
     $string = "Zero\nOne";
-    $array = array('0' => 'Zero', '1' => 'One');
+    $array = ['0' => 'Zero', '1' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Unkeyed lists are accepted.');
     // Explicit integer keys.
     $string = "0|Zero\n2|Two";
-    $array = array('0' => 'Zero', '2' => 'Two');
+    $array = ['0' => 'Zero', '2' => 'Two'];
     $this->assertAllowedValuesInput($string, $array, 'Integer keys are accepted.');
     // Check that values can be added and removed.
     $string = "0|Zero\n1|One";
-    $array = array('0' => 'Zero', '1' => 'One');
+    $array = ['0' => 'Zero', '1' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Values can be added and removed.');
     // Non-integer keys.
     $this->assertAllowedValuesInput("1.1|One", 'keys must be integers', 'Non integer keys are rejected.');
@@ -87,10 +87,10 @@ function testOptionsAllowedValuesInteger() {
     $this->assertAllowedValuesInput("Zero\n1|One", 'invalid input', 'Mixed lists are rejected.');
 
     // Create a node with actual data for the field.
-    $settings = array(
+    $settings = [
       'type' => $this->type,
-      $this->fieldName => array(array('value' => 1)),
-    );
+      $this->fieldName => [['value' => 1]],
+    ];
     $node = $this->drupalCreateNode($settings);
 
     // Check that a flat list of values is rejected once the field has data.
@@ -98,22 +98,22 @@ function testOptionsAllowedValuesInteger() {
 
     // Check that values can be added but values in use cannot be removed.
     $string = "0|Zero\n1|One\n2|Two";
-    $array = array('0' => 'Zero', '1' => 'One', '2' => 'Two');
+    $array = ['0' => 'Zero', '1' => 'One', '2' => 'Two'];
     $this->assertAllowedValuesInput($string, $array, 'Values can be added.');
     $string = "0|Zero\n1|One";
-    $array = array('0' => 'Zero', '1' => 'One');
+    $array = ['0' => 'Zero', '1' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Values not in use can be removed.');
     $this->assertAllowedValuesInput("0|Zero", 'some values are being removed while currently in use', 'Values in use cannot be removed.');
 
     // Delete the node, remove the value.
     $node->delete();
     $string = "0|Zero";
-    $array = array('0' => 'Zero');
+    $array = ['0' => 'Zero'];
     $this->assertAllowedValuesInput($string, $array, 'Values not in use can be removed.');
 
     // Check that the same key can only be used once.
     $string = "0|Zero\n0|One";
-    $array = array('0' => 'One');
+    $array = ['0' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Same value cannot be used multiple times.');
   }
 
@@ -126,15 +126,15 @@ function testOptionsAllowedValuesFloat() {
 
     // Flat list of textual values.
     $string = "Zero\nOne";
-    $array = array('0' => 'Zero', '1' => 'One');
+    $array = ['0' => 'Zero', '1' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Unkeyed lists are accepted.');
     // Explicit numeric keys.
     $string = "0|Zero\n.5|Point five";
-    $array = array('0' => 'Zero', '0.5' => 'Point five');
+    $array = ['0' => 'Zero', '0.5' => 'Point five'];
     $this->assertAllowedValuesInput($string, $array, 'Integer keys are accepted.');
     // Check that values can be added and removed.
     $string = "0|Zero\n.5|Point five\n1.0|One";
-    $array = array('0' => 'Zero', '0.5' => 'Point five', '1' => 'One');
+    $array = ['0' => 'Zero', '0.5' => 'Point five', '1' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Values can be added and removed.');
     // Non-numeric keys.
     $this->assertAllowedValuesInput("abc|abc\n", 'each key must be a valid integer or decimal', 'Non numeric keys are rejected.');
@@ -142,10 +142,10 @@ function testOptionsAllowedValuesFloat() {
     $this->assertAllowedValuesInput("Zero\n1|One\n", 'invalid input', 'Mixed lists are rejected.');
 
     // Create a node with actual data for the field.
-    $settings = array(
+    $settings = [
       'type' => $this->type,
-      $this->fieldName => array(array('value' => .5)),
-    );
+      $this->fieldName => [['value' => .5]],
+    ];
     $node = $this->drupalCreateNode($settings);
 
     // Check that a flat list of values is rejected once the field has data.
@@ -153,27 +153,27 @@ function testOptionsAllowedValuesFloat() {
 
     // Check that values can be added but values in use cannot be removed.
     $string = "0|Zero\n.5|Point five\n2|Two";
-    $array = array('0' => 'Zero', '0.5' => 'Point five', '2' => 'Two');
+    $array = ['0' => 'Zero', '0.5' => 'Point five', '2' => 'Two'];
     $this->assertAllowedValuesInput($string, $array, 'Values can be added.');
     $string = "0|Zero\n.5|Point five";
-    $array = array('0' => 'Zero', '0.5' => 'Point five');
+    $array = ['0' => 'Zero', '0.5' => 'Point five'];
     $this->assertAllowedValuesInput($string, $array, 'Values not in use can be removed.');
     $this->assertAllowedValuesInput("0|Zero", 'some values are being removed while currently in use', 'Values in use cannot be removed.');
 
     // Delete the node, remove the value.
     $node->delete();
     $string = "0|Zero";
-    $array = array('0' => 'Zero');
+    $array = ['0' => 'Zero'];
     $this->assertAllowedValuesInput($string, $array, 'Values not in use can be removed.');
 
     // Check that the same key can only be used once.
     $string = "0.5|Point five\n0.5|Half";
-    $array = array('0.5' => 'Half');
+    $array = ['0.5' => 'Half'];
     $this->assertAllowedValuesInput($string, $array, 'Same value cannot be used multiple times.');
 
     // Check that different forms of the same float value cannot be used.
     $string = "0|Zero\n.5|Point five\n0.5|Half";
-    $array = array('0' => 'Zero', '0.5' => 'Half');
+    $array = ['0' => 'Zero', '0.5' => 'Half'];
     $this->assertAllowedValuesInput($string, $array, 'Different forms of the same value cannot be used.');
   }
 
@@ -186,59 +186,59 @@ function testOptionsAllowedValuesText() {
 
     // Flat list of textual values.
     $string = "Zero\nOne";
-    $array = array('Zero' => 'Zero', 'One' => 'One');
+    $array = ['Zero' => 'Zero', 'One' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Unkeyed lists are accepted.');
     // Explicit keys.
     $string = "zero|Zero\none|One";
-    $array = array('zero' => 'Zero', 'one' => 'One');
+    $array = ['zero' => 'Zero', 'one' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Explicit keys are accepted.');
     // Check that values can be added and removed.
     $string = "zero|Zero\ntwo|Two";
-    $array = array('zero' => 'Zero', 'two' => 'Two');
+    $array = ['zero' => 'Zero', 'two' => 'Two'];
     $this->assertAllowedValuesInput($string, $array, 'Values can be added and removed.');
     // Mixed list of keyed and unkeyed values.
     $string = "zero|Zero\nOne\n";
-    $array = array('zero' => 'Zero', 'One' => 'One');
+    $array = ['zero' => 'Zero', 'One' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Mixed lists are accepted.');
     // Overly long keys.
     $this->assertAllowedValuesInput("zero|Zero\n" . $this->randomMachineName(256) . "|One", 'each key must be a string at most 255 characters long', 'Overly long keys are rejected.');
 
     // Create a node with actual data for the field.
-    $settings = array(
+    $settings = [
       'type' => $this->type,
-      $this->fieldName => array(array('value' => 'One')),
-    );
+      $this->fieldName => [['value' => 'One']],
+    ];
     $node = $this->drupalCreateNode($settings);
 
     // Check that flat lists of values are still accepted once the field has
     // data.
     $string = "Zero\nOne";
-    $array = array('Zero' => 'Zero', 'One' => 'One');
+    $array = ['Zero' => 'Zero', 'One' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Unkeyed lists are still accepted once the field has data.');
 
     // Check that values can be added but values in use cannot be removed.
     $string = "Zero\nOne\nTwo";
-    $array = array('Zero' => 'Zero', 'One' => 'One', 'Two' => 'Two');
+    $array = ['Zero' => 'Zero', 'One' => 'One', 'Two' => 'Two'];
     $this->assertAllowedValuesInput($string, $array, 'Values can be added.');
     $string = "Zero\nOne";
-    $array = array('Zero' => 'Zero', 'One' => 'One');
+    $array = ['Zero' => 'Zero', 'One' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Values not in use can be removed.');
     $this->assertAllowedValuesInput("Zero", 'some values are being removed while currently in use', 'Values in use cannot be removed.');
 
     // Delete the node, remove the value.
     $node->delete();
     $string = "Zero";
-    $array = array('Zero' => 'Zero');
+    $array = ['Zero' => 'Zero'];
     $this->assertAllowedValuesInput($string, $array, 'Values not in use can be removed.');
 
     // Check that string values with dots can be used.
     $string = "Zero\nexample.com|Example";
-    $array = array('Zero' => 'Zero', 'example.com' => 'Example');
+    $array = ['Zero' => 'Zero', 'example.com' => 'Example'];
     $this->assertAllowedValuesInput($string, $array, 'String value with dot is supported.');
 
     // Check that the same key can only be used once.
     $string = "zero|Zero\nzero|One";
-    $array = array('zero' => 'One');
+    $array = ['zero' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Same value cannot be used multiple times.');
   }
 
@@ -251,7 +251,7 @@ function testOptionsTrimmedValuesText() {
 
     // Explicit keys.
     $string = "zero |Zero\none | One";
-    $array = array('zero' => 'Zero', 'one' => 'One');
+    $array = ['zero' => 'Zero', 'one' => 'One'];
     $this->assertAllowedValuesInput($string, $array, 'Explicit keys are accepted and trimmed.');
   }
 
@@ -263,11 +263,11 @@ function testOptionsTrimmedValuesText() {
    */
   protected function createOptionsField($type) {
     // Create a field.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'node',
       'type' => $type,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'node',
@@ -292,7 +292,7 @@ protected function createOptionsField($type) {
    *   Message to display.
    */
   function assertAllowedValuesInput($input_string, $result, $message) {
-    $edit = array('settings[allowed_values]' => $input_string);
+    $edit = ['settings[allowed_values]' => $input_string];
     $this->drupalPostForm($this->adminPath, $edit, t('Save field settings'));
     $this->assertNoRaw('&amp;lt;', 'The page does not have double escaped HTML tags.');
 
@@ -311,32 +311,32 @@ function assertAllowedValuesInput($input_string, $result, $message) {
   function testNodeDisplay() {
     $this->fieldName = strtolower($this->randomMachineName());
     $this->createOptionsField('list_integer');
-    $node = $this->drupalCreateNode(array('type' => $this->type));
+    $node = $this->drupalCreateNode(['type' => $this->type]);
 
     $on = $this->randomMachineName();
     $off = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'settings[allowed_values]' =>
         "1|$on
         0|$off",
-    );
+    ];
 
     $this->drupalPostForm($this->adminPath, $edit, t('Save field settings'));
-    $this->assertText(format_string('Updated field @field_name field settings.', array('@field_name' => $this->fieldName)), "The 'On' and 'Off' form fields work for boolean fields.");
+    $this->assertText(format_string('Updated field @field_name field settings.', ['@field_name' => $this->fieldName]), "The 'On' and 'Off' form fields work for boolean fields.");
 
     // Select a default value.
-    $edit = array(
+    $edit = [
       $this->fieldName => '1',
-    );
+    ];
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
 
     // Check the node page and see if the values are correct.
-    $file_formatters = array('list_default', 'list_key');
+    $file_formatters = ['list_default', 'list_key'];
     foreach ($file_formatters as $formatter) {
-      $edit = array(
+      $edit = [
         "fields[$this->fieldName][type]" => $formatter,
         "fields[$this->fieldName][region]" => 'content',
-      );
+      ];
       $this->drupalPostForm('admin/structure/types/manage/' . $this->typeName . '/display', $edit, t('Save'));
       $this->drupalGet('node/' . $node->id());
 
diff --git a/core/modules/options/src/Tests/OptionsFloatFieldImportTest.php b/core/modules/options/src/Tests/OptionsFloatFieldImportTest.php
index 7b642e8f18f80f0003eb641c15aae40fb07d5856..5a2f20b24adb4aae1d6e3e453ff7c496adcdc72a 100644
--- a/core/modules/options/src/Tests/OptionsFloatFieldImportTest.php
+++ b/core/modules/options/src/Tests/OptionsFloatFieldImportTest.php
@@ -18,13 +18,13 @@ class OptionsFloatFieldImportTest extends FieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'options', 'field_ui', 'config', 'options_config_install_test');
+  public static $modules = ['node', 'options', 'field_ui', 'config', 'options_config_install_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create test user.
-    $admin_user = $this->drupalCreateUser(array('synchronize configuration', 'access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer nodes', 'bypass node access', 'administer node fields', 'administer node display'));
+    $admin_user = $this->drupalCreateUser(['synchronize configuration', 'access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer nodes', 'bypass node access', 'administer node fields', 'administer node display']);
     $this->drupalLogin($admin_user);
   }
 
@@ -39,7 +39,7 @@ public function testImport() {
     // necessary configuration for this test is created by installing that
     // module.
     $field_storage = FieldStorageConfig::loadByName('node', $field_name);
-    $this->assertIdentical($field_storage->getSetting('allowed_values'), $array = array('0' => 'Zero', '0.5' => 'Point five'));
+    $this->assertIdentical($field_storage->getSetting('allowed_values'), $array = ['0' => 'Zero', '0.5' => 'Point five']);
 
     $admin_path = 'admin/structure/types/manage/' . $type . '/fields/node.' . $type . '.' . $field_name . '/storage';
 
@@ -47,26 +47,26 @@ public function testImport() {
     $this->copyConfig($this->container->get('config.storage'), $this->container->get('config.storage.sync'));
 
     // Set the active to not use dots in the allowed values key names.
-    $edit = array('settings[allowed_values]' => "0|Zero\n1|One");
+    $edit = ['settings[allowed_values]' => "0|Zero\n1|One"];
     $this->drupalPostForm($admin_path, $edit, t('Save field settings'));
     $field_storage = FieldStorageConfig::loadByName('node', $field_name);
-    $this->assertIdentical($field_storage->getSetting('allowed_values'), $array = array('0' => 'Zero', '1' => 'One'));
+    $this->assertIdentical($field_storage->getSetting('allowed_values'), $array = ['0' => 'Zero', '1' => 'One']);
 
     // Import configuration with dots in the allowed values key names. This
     // tests \Drupal\Core\Config\Entity\ConfigEntityStorage::importUpdate().
     $this->drupalGet('admin/config/development/configuration');
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
     $field_storage = FieldStorageConfig::loadByName('node', $field_name);
-    $this->assertIdentical($field_storage->getSetting('allowed_values'), $array = array('0' => 'Zero', '0.5' => 'Point five'));
+    $this->assertIdentical($field_storage->getSetting('allowed_values'), $array = ['0' => 'Zero', '0.5' => 'Point five']);
 
     // Delete field to test creation. This tests
     // \Drupal\Core\Config\Entity\ConfigEntityStorage::importCreate().
     FieldConfig::loadByName('node', $type, $field_name)->delete();
 
     $this->drupalGet('admin/config/development/configuration');
-    $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm(NULL, [], t('Import all'));
     $field_storage = FieldStorageConfig::loadByName('node', $field_name);
-    $this->assertIdentical($field_storage->getSetting('allowed_values'), $array = array('0' => 'Zero', '0.5' => 'Point five'));
+    $this->assertIdentical($field_storage->getSetting('allowed_values'), $array = ['0' => 'Zero', '0.5' => 'Point five']);
   }
 
 }
diff --git a/core/modules/options/src/Tests/OptionsSelectDynamicValuesTest.php b/core/modules/options/src/Tests/OptionsSelectDynamicValuesTest.php
index df3365ca0759d81880df9c15ac51ea7046fb8285..72c0d55fdc6e13d0c019c6188e649cd19e190c79 100644
--- a/core/modules/options/src/Tests/OptionsSelectDynamicValuesTest.php
+++ b/core/modules/options/src/Tests/OptionsSelectDynamicValuesTest.php
@@ -16,7 +16,7 @@ function testSelectListDynamic() {
     $this->entity->save();
 
     // Create a web user.
-    $web_user = $this->drupalCreateUser(array('view test entity', 'administer entity_test content'));
+    $web_user = $this->drupalCreateUser(['view test entity', 'administer entity_test content']);
     $this->drupalLogin($web_user);
 
     // Display form.
diff --git a/core/modules/options/src/Tests/OptionsWidgetsTest.php b/core/modules/options/src/Tests/OptionsWidgetsTest.php
index 23f0f0da2dcc48168ee4445485926d7011d3efb6..8a907c20603e7424149e2a6b5ca50c6dd3f8a652 100644
--- a/core/modules/options/src/Tests/OptionsWidgetsTest.php
+++ b/core/modules/options/src/Tests/OptionsWidgetsTest.php
@@ -114,9 +114,9 @@ function testRadioButtons() {
     $this->assertRaw('Some HTML encoded markup with &lt; &amp; &gt;');
 
     // Select first option.
-    $edit = array('card_1' => 0);
+    $edit = ['card_1' => 0];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_1', array(0));
+    $this->assertFieldValues($entity_init, 'card_1', [0]);
 
     // Check that the selected button is checked.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
@@ -125,9 +125,9 @@ function testRadioButtons() {
     $this->assertNoFieldChecked('edit-card-1-2');
 
     // Unselect option.
-    $edit = array('card_1' => '_none');
+    $edit = ['card_1' => '_none'];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_1', array());
+    $this->assertFieldValues($entity_init, 'card_1', []);
 
     // Check that required radios with one option is auto-selected.
     $this->card1->setSetting('allowed_values', [99 => 'Only allowed value']);
@@ -149,16 +149,16 @@ function testCheckBoxes() {
     ]);
     $field->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($this->card2->getName(), array(
+      ->setComponent($this->card2->getName(), [
         'type' => 'options_buttons',
-      ))
+      ])
       ->save();
 
     // Create an entity.
-    $entity = EntityTest::create(array(
+    $entity = EntityTest::create([
       'user_id' => 1,
       'name' => $this->randomMachineName(),
-    ));
+    ]);
     $entity->save();
     $entity_init = clone $entity;
 
@@ -170,13 +170,13 @@ function testCheckBoxes() {
     $this->assertRaw('Some dangerous &amp; unescaped <strong>markup</strong>', 'Option text was properly filtered.');
 
     // Submit form: select first and third options.
-    $edit = array(
+    $edit = [
       'card_2[0]' => TRUE,
       'card_2[1]' => FALSE,
       'card_2[2]' => TRUE,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array(0, 2));
+    $this->assertFieldValues($entity_init, 'card_2', [0, 2]);
 
     // Display form: check that the right options are selected.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
@@ -185,13 +185,13 @@ function testCheckBoxes() {
     $this->assertFieldChecked('edit-card-2-2');
 
     // Submit form: select only first option.
-    $edit = array(
+    $edit = [
       'card_2[0]' => TRUE,
       'card_2[1]' => FALSE,
       'card_2[2]' => FALSE,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array(0));
+    $this->assertFieldValues($entity_init, 'card_2', [0]);
 
     // Display form: check that the right options are selected.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
@@ -200,23 +200,23 @@ function testCheckBoxes() {
     $this->assertNoFieldChecked('edit-card-2-2');
 
     // Submit form: select the three options while the field accepts only 2.
-    $edit = array(
+    $edit = [
       'card_2[0]' => TRUE,
       'card_2[1]' => TRUE,
       'card_2[2]' => TRUE,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertText('this field cannot hold more than 2 values', 'Validation error was displayed.');
 
     // Submit form: uncheck all options.
-    $edit = array(
+    $edit = [
       'card_2[0]' => FALSE,
       'card_2[1]' => FALSE,
       'card_2[2]' => FALSE,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     // Check that the value was saved.
-    $this->assertFieldValues($entity_init, 'card_2', array());
+    $this->assertFieldValues($entity_init, 'card_2', []);
 
     // Required checkbox with one option is auto-selected.
     $this->card2->setSetting('allowed_values', [99 => 'Only allowed value']);
@@ -239,23 +239,23 @@ function testSelectListSingle() {
     ]);
     $field->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($this->card1->getName(), array(
+      ->setComponent($this->card1->getName(), [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
 
     // Create an entity.
-    $entity = EntityTest::create(array(
+    $entity = EntityTest::create([
       'user_id' => 1,
       'name' => $this->randomMachineName(),
-    ));
+    ]);
     $entity->save();
     $entity_init = clone $entity;
 
     // Display form.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
     // A required field without any value has a "none" option.
-    $this->assertTrue($this->xpath('//select[@id=:id]//option[@value="_none" and text()=:label]', array(':id' => 'edit-card-1', ':label' => t('- Select a value -'))), 'A required select list has a "Select a value" choice.');
+    $this->assertTrue($this->xpath('//select[@id=:id]//option[@value="_none" and text()=:label]', [':id' => 'edit-card-1', ':label' => t('- Select a value -')]), 'A required select list has a "Select a value" choice.');
 
     // With no field data, nothing is selected.
     $this->assertNoOptionSelected('edit-card-1', '_none');
@@ -265,19 +265,19 @@ function testSelectListSingle() {
     $this->assertRaw('Some dangerous &amp; unescaped markup', 'Option text was properly filtered.');
 
     // Submit form: select invalid 'none' option.
-    $edit = array('card_1' => '_none');
+    $edit = ['card_1' => '_none'];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('@title field is required.', array('@title' => $field->getName())), 'Cannot save a required field when selecting "none" from the select list.');
+    $this->assertRaw(t('@title field is required.', ['@title' => $field->getName()]), 'Cannot save a required field when selecting "none" from the select list.');
 
     // Submit form: select first option.
-    $edit = array('card_1' => 0);
+    $edit = ['card_1' => 0];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_1', array(0));
+    $this->assertFieldValues($entity_init, 'card_1', [0]);
 
     // Display form: check that the right options are selected.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
     // A required field with a value has no 'none' option.
-    $this->assertFalse($this->xpath('//select[@id=:id]//option[@value="_none"]', array(':id' => 'edit-card-1')), 'A required select list with an actual value has no "none" choice.');
+    $this->assertFalse($this->xpath('//select[@id=:id]//option[@value="_none"]', [':id' => 'edit-card-1']), 'A required select list with an actual value has no "none" choice.');
     $this->assertOptionSelected('edit-card-1', 0);
     $this->assertNoOptionSelected('edit-card-1', 1);
     $this->assertNoOptionSelected('edit-card-1', 2);
@@ -289,11 +289,11 @@ function testSelectListSingle() {
     // Display form.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
     // A non-required field has a 'none' option.
-    $this->assertTrue($this->xpath('//select[@id=:id]//option[@value="_none" and text()=:label]', array(':id' => 'edit-card-1', ':label' => t('- None -'))), 'A non-required select list has a "None" choice.');
+    $this->assertTrue($this->xpath('//select[@id=:id]//option[@value="_none" and text()=:label]', [':id' => 'edit-card-1', ':label' => t('- None -')]), 'A non-required select list has a "None" choice.');
     // Submit form: Unselect the option.
-    $edit = array('card_1' => '_none');
+    $edit = ['card_1' => '_none'];
     $this->drupalPostForm('entity_test/manage/' . $entity->id() . '/edit', $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_1', array());
+    $this->assertFieldValues($entity_init, 'card_1', []);
 
     // Test optgroups.
 
@@ -311,9 +311,9 @@ function testSelectListSingle() {
     $this->assertRaw('Group 1', 'Option groups are displayed.');
 
     // Submit form: select first option.
-    $edit = array('card_1' => 0);
+    $edit = ['card_1' => 0];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_1', array(0));
+    $this->assertFieldValues($entity_init, 'card_1', [0]);
 
     // Display form: check that the right options are selected.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
@@ -322,9 +322,9 @@ function testSelectListSingle() {
     $this->assertNoOptionSelected('edit-card-1', 2);
 
     // Submit form: Unselect the option.
-    $edit = array('card_1' => '_none');
+    $edit = ['card_1' => '_none'];
     $this->drupalPostForm('entity_test/manage/' . $entity->id() . '/edit', $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_1', array());
+    $this->assertFieldValues($entity_init, 'card_1', []);
   }
 
   /**
@@ -338,16 +338,16 @@ function testSelectListMultiple() {
     ]);
     $field->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($this->card2->getName(), array(
+      ->setComponent($this->card2->getName(), [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
 
     // Create an entity.
-    $entity = EntityTest::create(array(
+    $entity = EntityTest::create([
       'user_id' => 1,
       'name' => $this->randomMachineName(),
-    ));
+    ]);
     $entity->save();
     $entity_init = clone $entity;
 
@@ -360,9 +360,9 @@ function testSelectListMultiple() {
     $this->assertRaw('Some dangerous &amp; unescaped markup', 'Option text was properly filtered.');
 
     // Submit form: select first and third options.
-    $edit = array('card_2[]' => array(0 => 0, 2 => 2));
+    $edit = ['card_2[]' => [0 => 0, 2 => 2]];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array(0, 2));
+    $this->assertFieldValues($entity_init, 'card_2', [0, 2]);
 
     // Display form: check that the right options are selected.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
@@ -371,9 +371,9 @@ function testSelectListMultiple() {
     $this->assertOptionSelected('edit-card-2', 2);
 
     // Submit form: select only first option.
-    $edit = array('card_2[]' => array(0 => 0));
+    $edit = ['card_2[]' => [0 => 0]];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array(0));
+    $this->assertFieldValues($entity_init, 'card_2', [0]);
 
     // Display form: check that the right options are selected.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
@@ -382,33 +382,33 @@ function testSelectListMultiple() {
     $this->assertNoOptionSelected('edit-card-2', 2);
 
     // Submit form: select the three options while the field accepts only 2.
-    $edit = array('card_2[]' => array(0 => 0, 1 => 1, 2 => 2));
+    $edit = ['card_2[]' => [0 => 0, 1 => 1, 2 => 2]];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertText('this field cannot hold more than 2 values', 'Validation error was displayed.');
 
     // Submit form: uncheck all options.
-    $edit = array('card_2[]' => array());
+    $edit = ['card_2[]' => []];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array());
+    $this->assertFieldValues($entity_init, 'card_2', []);
 
     // Test the 'None' option.
 
     // Check that the 'none' option has no effect if actual options are selected
     // as well.
-    $edit = array('card_2[]' => array('_none' => '_none', 0 => 0));
+    $edit = ['card_2[]' => ['_none' => '_none', 0 => 0]];
     $this->drupalPostForm('entity_test/manage/' . $entity->id() . '/edit', $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array(0));
+    $this->assertFieldValues($entity_init, 'card_2', [0]);
 
     // Check that selecting the 'none' option empties the field.
-    $edit = array('card_2[]' => array('_none' => '_none'));
+    $edit = ['card_2[]' => ['_none' => '_none']];
     $this->drupalPostForm('entity_test/manage/' . $entity->id() . '/edit', $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array());
+    $this->assertFieldValues($entity_init, 'card_2', []);
 
     // A required select list does not have an empty key.
     $field->setRequired(TRUE);
     $field->save();
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
-    $this->assertFalse($this->xpath('//select[@id=:id]//option[@value=""]', array(':id' => 'edit-card-2')), 'A required select list does not have an empty key.');
+    $this->assertFalse($this->xpath('//select[@id=:id]//option[@value=""]', [':id' => 'edit-card-2']), 'A required select list does not have an empty key.');
 
     // We do not have to test that a required select list with one option is
     // auto-selected because the browser does it for us.
@@ -432,9 +432,9 @@ function testSelectListMultiple() {
     $this->assertRaw('Group 1', 'Option groups are displayed.');
 
     // Submit form: select first option.
-    $edit = array('card_2[]' => array(0 => 0));
+    $edit = ['card_2[]' => [0 => 0]];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array(0));
+    $this->assertFieldValues($entity_init, 'card_2', [0]);
 
     // Display form: check that the right options are selected.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
@@ -443,9 +443,9 @@ function testSelectListMultiple() {
     $this->assertNoOptionSelected('edit-card-2', 2);
 
     // Submit form: Unselect the option.
-    $edit = array('card_2[]' => array('_none' => '_none'));
+    $edit = ['card_2[]' => ['_none' => '_none']];
     $this->drupalPostForm('entity_test/manage/' . $entity->id() . '/edit', $edit, t('Save'));
-    $this->assertFieldValues($entity_init, 'card_2', array());
+    $this->assertFieldValues($entity_init, 'card_2', []);
   }
 
   /**
@@ -475,20 +475,20 @@ function testEmptyValue() {
 
     // Display form: check that _none options are present and has label.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
-    $this->assertTrue($this->xpath('//div[@id=:id]//input[@value=:value]', array(':id' => 'edit-card-1', ':value' => '_none')), 'A test radio button has a "None" choice.');
-    $this->assertTrue($this->xpath('//div[@id=:id]//label[@for=:for and text()=:label]', array(':id' => 'edit-card-1', ':for' => 'edit-card-1-none', ':label' => 'N/A')), 'A test radio button has a "N/A" choice.');
+    $this->assertTrue($this->xpath('//div[@id=:id]//input[@value=:value]', [':id' => 'edit-card-1', ':value' => '_none']), 'A test radio button has a "None" choice.');
+    $this->assertTrue($this->xpath('//div[@id=:id]//label[@for=:for and text()=:label]', [':id' => 'edit-card-1', ':for' => 'edit-card-1-none', ':label' => 'N/A']), 'A test radio button has a "N/A" choice.');
 
     // Change it to the select widget.
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($this->card1->getName(), array(
+      ->setComponent($this->card1->getName(), [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
 
     // Display form: check that _none options are present and has label.
     $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
     // A required field without any value has a "none" option.
-    $this->assertTrue($this->xpath('//select[@id=:id]//option[@value="_none" and text()=:label]', array(':id' => 'edit-card-1', ':label' => t('- None -'))), 'A test select has a "None" choice.');
+    $this->assertTrue($this->xpath('//select[@id=:id]//option[@value="_none" and text()=:label]', [':id' => 'edit-card-1', ':label' => t('- None -')]), 'A test select has a "None" choice.');
   }
 
 }
diff --git a/core/modules/options/tests/options_test/options_test.module b/core/modules/options/tests/options_test/options_test.module
index d20401af6956c722dddcb3550e373320e3de32fd..dbb474b493731df84400088d1e5f495e91c9e967 100644
--- a/core/modules/options/tests/options_test/options_test.module
+++ b/core/modules/options/tests/options_test/options_test.module
@@ -14,18 +14,18 @@
  * @see options_allowed_values()
  */
 function options_test_allowed_values_callback(FieldStorageDefinitionInterface $definition, FieldableEntityInterface $entity = NULL) {
-  $values = array(
-    'Group 1' => array(
+  $values = [
+    'Group 1' => [
       0 => 'Zero',
-    ),
+    ],
     1 => 'One',
-    'Group 2' => array(
+    'Group 2' => [
       2 => 'Some <script>dangerous</script> & unescaped <strong>markup</strong>',
-    ),
-    'More <script>dangerous</script> markup' => array(
+    ],
+    'More <script>dangerous</script> markup' => [
       3 => 'Three',
-    ),
-  );
+    ],
+  ];
 
   return $values;
 }
@@ -41,15 +41,15 @@ function options_test_allowed_values_callback(FieldStorageDefinitionInterface $d
  * @see options_allowed_values()
  */
 function options_test_dynamic_values_callback(FieldStorageDefinitionInterface $definition, FieldableEntityInterface $entity = NULL, &$cacheable = NULL) {
-  $values = array();
+  $values = [];
   if (isset($entity)) {
     $cacheable = FALSE;
-    $values = array(
+    $values = [
       $entity->label(),
       $entity->url(),
       $entity->uuid(),
       $entity->bundle(),
-    );
+    ];
   }
   // We need the values of the entity as keys.
   return array_combine($values, $values);
diff --git a/core/modules/options/tests/src/Kernel/OptionsFieldTest.php b/core/modules/options/tests/src/Kernel/OptionsFieldTest.php
index 89ac127160e250e53e2869d4389b52e5202ccb97..d3912a29ecd77c62d98e3d0ba0d9c0f62341a9f1 100644
--- a/core/modules/options/tests/src/Kernel/OptionsFieldTest.php
+++ b/core/modules/options/tests/src/Kernel/OptionsFieldTest.php
@@ -19,7 +19,7 @@ class OptionsFieldTest extends OptionsFieldUnitTestBase {
    *
    * @var array
    */
-  public static $modules = array('options');
+  public static $modules = ['options'];
 
   /**
    * Test that allowed values can be updated.
@@ -81,9 +81,9 @@ function testUpdateAllowedValues() {
       'required' => TRUE,
     ])->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'options_buttons',
-      ))
+      ])
       ->save();
     $entity = EntityTest::create();
     $form = \Drupal::service('entity.form_builder')->getForm($entity);
diff --git a/core/modules/options/tests/src/Kernel/OptionsFieldUnitTestBase.php b/core/modules/options/tests/src/Kernel/OptionsFieldUnitTestBase.php
index 7dd7cbeecd752d39a9f653df9f9256084f057b26..9098b818b7021685686524cb7facb9ba9212186e 100644
--- a/core/modules/options/tests/src/Kernel/OptionsFieldUnitTestBase.php
+++ b/core/modules/options/tests/src/Kernel/OptionsFieldUnitTestBase.php
@@ -16,7 +16,7 @@ abstract class OptionsFieldUnitTestBase extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('options');
+  public static $modules = ['options'];
 
   /**
    * The field name used in the test.
@@ -53,15 +53,15 @@ protected function setUp() {
     parent::setUp();
     $this->container->get('router.builder')->rebuild();
 
-    $this->fieldStorageDefinition = array(
+    $this->fieldStorageDefinition = [
       'field_name' => $this->fieldName,
       'entity_type' => 'entity_test',
       'type' => 'list_integer',
       'cardinality' => 1,
-      'settings' => array(
-        'allowed_values' => array(1 => 'One', 2 => 'Two', 3 => 'Three'),
-      ),
-    );
+      'settings' => [
+        'allowed_values' => [1 => 'One', 2 => 'Two', 3 => 'Three'],
+      ],
+    ];
     $this->fieldStorage = FieldStorageConfig::create($this->fieldStorageDefinition);
     $this->fieldStorage->save();
 
@@ -72,9 +72,9 @@ protected function setUp() {
     $this->field->save();
 
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'options_buttons',
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/options/tests/src/Kernel/OptionsFormattersTest.php b/core/modules/options/tests/src/Kernel/OptionsFormattersTest.php
index 632900e99c7955e1a3da07397e205da395d41639..93607f6f9d751ca8059a4b763be96e4a460007bf 100644
--- a/core/modules/options/tests/src/Kernel/OptionsFormattersTest.php
+++ b/core/modules/options/tests/src/Kernel/OptionsFormattersTest.php
@@ -33,7 +33,7 @@ public function testFormatter() {
     $this->assertEqual($build['#formatter'], 'list_default', 'Ensure to fall back to the default formatter.');
     $this->assertEqual($build[0]['#markup'], 'One');
 
-    $build = $items->view(array('type' => 'list_key'));
+    $build = $items->view(['type' => 'list_key']);
     $this->assertEqual($build['#formatter'], 'list_key', 'The chosen formatter is used.');
     $this->assertEqual((string) $build[0]['#markup'], 1);
   }
diff --git a/core/modules/options/tests/src/Kernel/Views/FileViewsDataTest.php b/core/modules/options/tests/src/Kernel/Views/FileViewsDataTest.php
index 060c05ec815dc622224de8f57e414af0c8b018bc..c5f2902d055d1c351cd71a31c4f74adca8e1e8e0 100644
--- a/core/modules/options/tests/src/Kernel/Views/FileViewsDataTest.php
+++ b/core/modules/options/tests/src/Kernel/Views/FileViewsDataTest.php
@@ -19,7 +19,7 @@ class FileViewsDataTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('file', 'views', 'entity_test', 'user', 'field');
+  public static $modules = ['file', 'views', 'entity_test', 'user', 'field'];
 
   /**
    * Tests views data generated for file field relationship.
@@ -29,16 +29,16 @@ class FileViewsDataTest extends ViewsKernelTestBase {
    */
   public function testRelationshipViewsData() {
     // Create file field to entity_test.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_base_file',
       'type' => 'file',
-    ))->save();
-    FieldConfig::create(array(
+    ])->save();
+    FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_base_file',
       'bundle' => 'entity_test',
-    ))->save();
+    ])->save();
     // Check the generated views data.
     $views_data = Views::viewsData()->get('entity_test__field_base_file');
     $relationship = $views_data['field_base_file_target_id']['relationship'];
@@ -59,16 +59,16 @@ public function testRelationshipViewsData() {
     $this->assertEqual($relationship['join_extra'][0], ['field' => 'deleted', 'value' => 0, 'numeric' => TRUE]);
 
     // Create file field to entity_test_mul.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test_mul',
       'field_name' => 'field_data_file',
       'type' => 'file',
-    ))->save();
-    FieldConfig::create(array(
+    ])->save();
+    FieldConfig::create([
       'entity_type' => 'entity_test_mul',
       'field_name' => 'field_data_file',
       'bundle' => 'entity_test_mul',
-    ))->save();
+    ])->save();
     // Check the generated views data.
     $views_data = Views::viewsData()->get('entity_test_mul__field_data_file');
     $relationship = $views_data['field_data_file_target_id']['relationship'];
diff --git a/core/modules/outside_in/src/Form/SystemMenuOffCanvasForm.php b/core/modules/outside_in/src/Form/SystemMenuOffCanvasForm.php
index b1dd9ac530125a899b7477f512f137f7b2fa47f8..d8ba9f4fc5fed8ebf407a710a51667310b8b0fbe 100644
--- a/core/modules/outside_in/src/Form/SystemMenuOffCanvasForm.php
+++ b/core/modules/outside_in/src/Form/SystemMenuOffCanvasForm.php
@@ -81,7 +81,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
 
     $form['entity_form'] = [
       '#type' => 'details',
-      '#title' => $this->t('Edit menu %label', array('%label' => $this->entity->label())),
+      '#title' => $this->t('Edit menu %label', ['%label' => $this->entity->label()]),
       '#open' => TRUE,
     ];
     $form['entity_form'] += $this->getEntityForm($this->entity)->buildForm([], $form_state);
diff --git a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInJavascriptTestBase.php b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInJavascriptTestBase.php
index 8cdeec0312aa13874c6a813de87c293f56ba9ff5..325aec7ff2cd693c15c4474ba1a452450669b82a 100644
--- a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInJavascriptTestBase.php
+++ b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInJavascriptTestBase.php
@@ -12,7 +12,7 @@ abstract class OutsideInJavascriptTestBase extends JavascriptTestBase {
   /**
    * {@inheritdoc}
    */
-  protected function drupalGet($path, array $options = array(), array $headers = array()) {
+  protected function drupalGet($path, array $options = [], array $headers = []) {
     $return = parent::drupalGet($path, $options, $headers);
 
     // After the page loaded we need to additionally wait until the settings
diff --git a/core/modules/page_cache/page_cache.module b/core/modules/page_cache/page_cache.module
index 3b8baf4ca3b75b6431979a9782b666957c96f9a9..ff7286199d7edd6a67c3eed7af72097762598411 100644
--- a/core/modules/page_cache/page_cache.module
+++ b/core/modules/page_cache/page_cache.module
@@ -15,7 +15,7 @@ function page_cache_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.page_cache':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Internal Page Cache module caches pages for anonymous users in the database. For more information, see the <a href=":pagecache-documentation">online documentation for the Internal Page Cache module</a>.', array(':pagecache-documentation' => 'https://www.drupal.org/documentation/modules/internal_page_cache')) . '</p>';
+      $output .= '<p>' . t('The Internal Page Cache module caches pages for anonymous users in the database. For more information, see the <a href=":pagecache-documentation">online documentation for the Internal Page Cache module</a>.', [':pagecache-documentation' => 'https://www.drupal.org/documentation/modules/internal_page_cache']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Speeding up your site') . '</dt>';
@@ -23,7 +23,7 @@ function page_cache_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<dd>' . t('Pages are usually identical for all anonymous users, while they can be personalized for each authenticated user. This is why entire pages can be cached for anonymous users, whereas they will have to be rebuilt for every authenticated user.') . '</dd>';
       $output .= '<dd>' . t('To speed up your site for authenticated users, see the <a href=":dynamic_page_cache-help">Dynamic Page Cache module</a>.', [':dynamic_page_cache-help' => (\Drupal::moduleHandler()->moduleExists('dynamic_page_cache')) ? Url::fromRoute('help.page', ['name' => 'dynamic_page_cache'])->toString() : '#']) . '</p>';
       $output .= '<dt>' . t('Configuring the internal page cache') . '</dt>';
-      $output .= '<dd>' . t('On the <a href=":cache-settings">Performance page</a>, you can configure how long browsers and proxies may cache pages; that setting is also respected by the Internal Page Cache module. There is no other configuration.', array(':cache-settings' => \Drupal::url('system.performance_settings'))) . '</dd>';
+      $output .= '<dd>' . t('On the <a href=":cache-settings">Performance page</a>, you can configure how long browsers and proxies may cache pages; that setting is also respected by the Internal Page Cache module. There is no other configuration.', [':cache-settings' => \Drupal::url('system.performance_settings')]) . '</dd>';
       $output .= '</dl>';
 
       return $output;
diff --git a/core/modules/page_cache/src/StackMiddleware/PageCache.php b/core/modules/page_cache/src/StackMiddleware/PageCache.php
index 3a031db48efed2676308852562afb2b50c01c45d..97d53c6029b7381714eb26754790b1eb3b670d90 100644
--- a/core/modules/page_cache/src/StackMiddleware/PageCache.php
+++ b/core/modules/page_cache/src/StackMiddleware/PageCache.php
@@ -168,7 +168,7 @@ protected function lookup(Request $request, $type = self::MASTER_REQUEST, $catch
         // In the case of a 304 response, certain headers must be sent, and the
         // remaining may not (see RFC 2616, section 10.3.5).
         foreach (array_keys($response->headers->all()) as $name) {
-          if (!in_array($name, array('content-location', 'expires', 'cache-control', 'vary'))) {
+          if (!in_array($name, ['content-location', 'expires', 'cache-control', 'vary'])) {
             $response->headers->remove($name);
           }
         }
@@ -357,10 +357,10 @@ protected function set(Request $request, Response $response, $expire, array $tag
    *   The cache ID for this request.
    */
   protected function getCacheId(Request $request) {
-    $cid_parts = array(
+    $cid_parts = [
       $request->getUri(),
       $request->getRequestFormat(),
-    );
+    ];
     return implode(':', $cid_parts);
   }
 
diff --git a/core/modules/page_cache/src/Tests/PageCacheTagsIntegrationTest.php b/core/modules/page_cache/src/Tests/PageCacheTagsIntegrationTest.php
index 2c945fdb3d7ad7953f34a28a34a1743699555947..c3aeb84a7622f101d1c2345a9355ed98474ff78d 100644
--- a/core/modules/page_cache/src/Tests/PageCacheTagsIntegrationTest.php
+++ b/core/modules/page_cache/src/Tests/PageCacheTagsIntegrationTest.php
@@ -39,32 +39,32 @@ protected function setUp() {
   function testPageCacheTags() {
     // Create two nodes.
     $author_1 = $this->drupalCreateUser();
-    $node_1 = $this->drupalCreateNode(array(
+    $node_1 = $this->drupalCreateNode([
       'uid' => $author_1->id(),
       'title' => 'Node 1',
-      'body' => array(
-        0 => array('value' => 'Body 1', 'format' => 'basic_html'),
-      ),
+      'body' => [
+        0 => ['value' => 'Body 1', 'format' => 'basic_html'],
+      ],
       'promote' => NodeInterface::PROMOTED,
-    ));
+    ]);
     $author_2 = $this->drupalCreateUser();
-    $node_2 = $this->drupalCreateNode(array(
+    $node_2 = $this->drupalCreateNode([
       'uid' => $author_2->id(),
       'title' => 'Node 2',
-      'body' => array(
-        0 => array('value' => 'Body 2', 'format' => 'full_html'),
-      ),
+      'body' => [
+        0 => ['value' => 'Body 2', 'format' => 'full_html'],
+      ],
       'promote' => NodeInterface::PROMOTED,
-    ));
+    ]);
 
     // Place a block, but only make it visible on full node page 2.
-    $block = $this->drupalPlaceBlock('views_block:comments_recent-block_1', array(
-      'visibility' => array(
-        'request_path' => array(
+    $block = $this->drupalPlaceBlock('views_block:comments_recent-block_1', [
+      'visibility' => [
+        'request_path' => [
           'pages' => '/node/' . $node_2->id(),
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     $cache_contexts = [
       'languages:' . LanguageInterface::TYPE_INTERFACE,
@@ -79,7 +79,7 @@ function testPageCacheTags() {
     ];
 
     // Full node page 1.
-    $this->assertPageCacheContextsAndTags($node_1->urlInfo(), $cache_contexts, array(
+    $this->assertPageCacheContextsAndTags($node_1->urlInfo(), $cache_contexts, [
       'http_response',
       'rendered',
       'block_view',
@@ -114,13 +114,13 @@ function testPageCacheTags() {
       // FinishResponseSubscriber adds this cache tag to responses that have the
       // 'user.permissions' cache context for anonymous users.
       'config:user.role.anonymous',
-    ));
+    ]);
 
     // Render the view block adds the languages cache context.
     $cache_contexts[] = 'languages:' . LanguageInterface::TYPE_CONTENT;
 
     // Full node page 2.
-    $this->assertPageCacheContextsAndTags($node_2->urlInfo(), $cache_contexts, array(
+    $this->assertPageCacheContextsAndTags($node_2->urlInfo(), $cache_contexts, [
       'http_response',
       'rendered',
       'block_view',
@@ -158,7 +158,7 @@ function testPageCacheTags() {
       // 'user.permissions' cache context for anonymous users.
       'config:user.role.anonymous',
       'user:0',
-    ));
+    ]);
   }
 
 }
diff --git a/core/modules/page_cache/src/Tests/PageCacheTest.php b/core/modules/page_cache/src/Tests/PageCacheTest.php
index d4fae54a5fca526443129d74d23f8500fc4772f3..aec0451120a98b6c46c574275e77ae427f75d1ba 100644
--- a/core/modules/page_cache/src/Tests/PageCacheTest.php
+++ b/core/modules/page_cache/src/Tests/PageCacheTest.php
@@ -24,7 +24,7 @@ class PageCacheTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('test_page_test', 'system_test', 'entity_test');
+  public static $modules = ['test_page_test', 'system_test', 'entity_test'];
 
   /**
    * {@inheritdoc}
@@ -50,24 +50,24 @@ function testPageCacheTags() {
     $config->save();
 
     $path = 'system-test/cache_tags_page';
-    $tags = array('system_test_cache_tags_page');
+    $tags = ['system_test_cache_tags_page'];
     $this->drupalGet($path);
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS');
 
     // Verify a cache hit, but also the presence of the correct cache tags.
     $this->drupalGet($path);
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT');
-    $cid_parts = array(\Drupal::url('system_test.cache_tags_page', array(), array('absolute' => TRUE)), 'html');
+    $cid_parts = [\Drupal::url('system_test.cache_tags_page', [], ['absolute' => TRUE]), 'html'];
     $cid = implode(':', $cid_parts);
     $cache_entry = \Drupal::cache('render')->get($cid);
     sort($cache_entry->tags);
-    $expected_tags = array(
+    $expected_tags = [
       'config:user.role.anonymous',
       'http_response',
       'pre_render',
       'rendered',
       'system_test_cache_tags_page',
-    );
+    ];
     $this->assertIdentical($cache_entry->tags, $expected_tags);
 
     Cache::invalidateTags($tags);
@@ -82,24 +82,24 @@ function testPageCacheTagsIndependentFromCacheabilityHeaders() {
     $this->setHttpResponseDebugCacheabilityHeaders(FALSE);
 
     $path = 'system-test/cache_tags_page';
-    $tags = array('system_test_cache_tags_page');
+    $tags = ['system_test_cache_tags_page'];
     $this->drupalGet($path);
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS');
 
     // Verify a cache hit, but also the presence of the correct cache tags.
     $this->drupalGet($path);
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT');
-    $cid_parts = array(\Drupal::url('system_test.cache_tags_page', array(), array('absolute' => TRUE)), 'html');
+    $cid_parts = [\Drupal::url('system_test.cache_tags_page', [], ['absolute' => TRUE]), 'html'];
     $cid = implode(':', $cid_parts);
     $cache_entry = \Drupal::cache('render')->get($cid);
     sort($cache_entry->tags);
-    $expected_tags = array(
+    $expected_tags = [
       'config:user.role.anonymous',
       'http_response',
       'pre_render',
       'rendered',
       'system_test_cache_tags_page',
-    );
+    ];
     $this->assertIdentical($cache_entry->tags, $expected_tags);
 
     Cache::invalidateTags($tags);
@@ -190,28 +190,28 @@ function testConditionalRequests() {
     $etag = $this->drupalGetHeader('ETag');
     $last_modified = $this->drupalGetHeader('Last-Modified');
 
-    $this->drupalGet('', array(), array('If-Modified-Since: ' . $last_modified, 'If-None-Match: ' . $etag));
+    $this->drupalGet('', [], ['If-Modified-Since: ' . $last_modified, 'If-None-Match: ' . $etag]);
     $this->assertResponse(304, 'Conditional request returned 304 Not Modified.');
 
-    $this->drupalGet('', array(), array('If-Modified-Since: ' . gmdate(DATE_RFC822, strtotime($last_modified)), 'If-None-Match: ' . $etag));
+    $this->drupalGet('', [], ['If-Modified-Since: ' . gmdate(DATE_RFC822, strtotime($last_modified)), 'If-None-Match: ' . $etag]);
     $this->assertResponse(304, 'Conditional request with obsolete If-Modified-Since date returned 304 Not Modified.');
 
-    $this->drupalGet('', array(), array('If-Modified-Since: ' . gmdate(DATE_RFC850, strtotime($last_modified)), 'If-None-Match: ' . $etag));
+    $this->drupalGet('', [], ['If-Modified-Since: ' . gmdate(DATE_RFC850, strtotime($last_modified)), 'If-None-Match: ' . $etag]);
     $this->assertResponse(304, 'Conditional request with obsolete If-Modified-Since date returned 304 Not Modified.');
 
-    $this->drupalGet('', array(), array('If-Modified-Since: ' . $last_modified));
+    $this->drupalGet('', [], ['If-Modified-Since: ' . $last_modified]);
     // Verify the page is not printed twice when the cache is warm.
     $this->assertNoPattern('#<html.*<html#');
     $this->assertResponse(200, 'Conditional request without If-None-Match returned 200 OK.');
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT', 'Page was cached.');
 
-    $this->drupalGet('', array(), array('If-Modified-Since: ' . gmdate(DateTimePlus::RFC7231, strtotime($last_modified) + 1), 'If-None-Match: ' . $etag));
+    $this->drupalGet('', [], ['If-Modified-Since: ' . gmdate(DateTimePlus::RFC7231, strtotime($last_modified) + 1), 'If-None-Match: ' . $etag]);
     $this->assertResponse(200, 'Conditional request with new a If-Modified-Since date newer than Last-Modified returned 200 OK.');
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT', 'Page was cached.');
 
     $user = $this->drupalCreateUser();
     $this->drupalLogin($user);
-    $this->drupalGet('', array(), array('If-Modified-Since: ' . $last_modified, 'If-None-Match: ' . $etag));
+    $this->drupalGet('', [], ['If-Modified-Since: ' . $last_modified, 'If-None-Match: ' . $etag]);
     $this->assertResponse(200, 'Conditional request returned 200 OK for authenticated user.');
     $this->assertFalse($this->drupalGetHeader('X-Drupal-Cache'), 'Absence of Page was not cached.');
   }
@@ -226,7 +226,7 @@ function testPageCache() {
     $config->save();
 
     // Fill the cache.
-    $this->drupalGet('system-test/set-header', array('query' => array('name' => 'Foo', 'value' => 'bar')));
+    $this->drupalGet('system-test/set-header', ['query' => ['name' => 'Foo', 'value' => 'bar']]);
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS', 'Page was not cached.');
     $this->assertEqual(strtolower($this->drupalGetHeader('Vary')), 'cookie,accept-encoding', 'Vary header was sent.');
     // Symfony's Response logic determines a specific order for the subvalues
@@ -237,7 +237,7 @@ function testPageCache() {
     $this->assertEqual($this->drupalGetHeader('Foo'), 'bar', 'Custom header was sent.');
 
     // Check cache.
-    $this->drupalGet('system-test/set-header', array('query' => array('name' => 'Foo', 'value' => 'bar')));
+    $this->drupalGet('system-test/set-header', ['query' => ['name' => 'Foo', 'value' => 'bar']]);
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT', 'Page was cached.');
     $this->assertEqual(strtolower($this->drupalGetHeader('Vary')), 'cookie,accept-encoding', 'Vary: Cookie header was sent.');
     $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'max-age=300, public', 'Cache-Control header was sent.');
@@ -245,15 +245,15 @@ function testPageCache() {
     $this->assertEqual($this->drupalGetHeader('Foo'), 'bar', 'Custom header was sent.');
 
     // Check replacing default headers.
-    $this->drupalGet('system-test/set-header', array('query' => array('name' => 'Expires', 'value' => 'Fri, 19 Nov 2008 05:00:00 GMT')));
+    $this->drupalGet('system-test/set-header', ['query' => ['name' => 'Expires', 'value' => 'Fri, 19 Nov 2008 05:00:00 GMT']]);
     $this->assertEqual($this->drupalGetHeader('Expires'), 'Fri, 19 Nov 2008 05:00:00 GMT', 'Default header was replaced.');
-    $this->drupalGet('system-test/set-header', array('query' => array('name' => 'Vary', 'value' => 'User-Agent')));
+    $this->drupalGet('system-test/set-header', ['query' => ['name' => 'Vary', 'value' => 'User-Agent']]);
     $this->assertEqual(strtolower($this->drupalGetHeader('Vary')), 'user-agent,accept-encoding', 'Default header was replaced.');
 
     // Check that authenticated users bypass the cache.
     $user = $this->drupalCreateUser();
     $this->drupalLogin($user);
-    $this->drupalGet('system-test/set-header', array('query' => array('name' => 'Foo', 'value' => 'bar')));
+    $this->drupalGet('system-test/set-header', ['query' => ['name' => 'Foo', 'value' => 'bar']]);
     $this->assertFalse($this->drupalGetHeader('X-Drupal-Cache'), 'Caching was bypassed.');
     $this->assertTrue(strpos(strtolower($this->drupalGetHeader('Vary')), 'cookie') === FALSE, 'Vary: Cookie header was not sent.');
     $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'must-revalidate, no-cache, private', 'Cache-Control header was sent.');
@@ -349,16 +349,16 @@ function testPageCacheAnonymous403404() {
       $this->drupalGet($content_url);
       $this->assertResponse($code);
       $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT');
-      $entity_values = array(
+      $entity_values = [
         'name' => $this->randomMachineName(),
         'user_id' => 1,
-        'field_test_text' => array(
-          0 => array(
+        'field_test_text' => [
+          0 => [
             'value' => $this->randomString(),
             'format' => 'plain_text',
-          )
-        ),
-      );
+          ]
+        ],
+      ];
       $entity = EntityTest::create($entity_values);
       $entity->save();
       // Saving an entity clears 4xx cache tag.
@@ -389,10 +389,10 @@ function testPageCacheAnonymous403404() {
     }
 
     // Disable 403 and 404 caching.
-    $settings['settings']['cache_ttl_4xx'] = (object) array(
+    $settings['settings']['cache_ttl_4xx'] = (object) [
       'value' => 0,
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
     \Drupal::service('cache.render')->deleteAll();
 
@@ -413,10 +413,10 @@ public function testPageCacheWithoutVaryCookie() {
     $config->set('cache.page.max_age', 300);
     $config->save();
 
-    $settings['settings']['omit_vary_cookie'] = (object) array(
+    $settings['settings']['omit_vary_cookie'] = (object) [
       'value' => TRUE,
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
 
     // Fill the cache.
diff --git a/core/modules/path/path.api.php b/core/modules/path/path.api.php
index 04e1fb31679f1970be606a56bea023c1cb05a7a2..df20b95e90602b6b572a87b8c15f52ec5972cca1 100644
--- a/core/modules/path/path.api.php
+++ b/core/modules/path/path.api.php
@@ -21,10 +21,10 @@
  */
 function hook_path_insert($path) {
   db_insert('mytable')
-    ->fields(array(
+    ->fields([
       'alias' => $path['alias'],
       'pid' => $path['pid'],
-    ))
+    ])
     ->execute();
 }
 
@@ -40,7 +40,7 @@ function hook_path_insert($path) {
 function hook_path_update($path) {
   if ($path['alias'] != $path['original']['alias']) {
     db_update('mytable')
-      ->fields(array('alias' => $path['alias']))
+      ->fields(['alias' => $path['alias']])
       ->condition('pid', $path['pid'])
       ->execute();
   }
diff --git a/core/modules/path/path.module b/core/modules/path/path.module
index 182c6a9dd09bb2db2c5666cc6e82b8fd16d3b502..a724b773d6ef88637cb4c43b8ff84f4348f86cb3 100644
--- a/core/modules/path/path.module
+++ b/core/modules/path/path.module
@@ -18,13 +18,13 @@ function path_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.path':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Path module allows you to specify an alias, or custom URL, for any existing internal system path. Aliases should not be confused with URL redirects, which allow you to forward a changed or inactive URL to a new URL. In addition to making URLs more readable, aliases also help search engines index content more effectively. Multiple aliases may be used for a single internal system path. To automate the aliasing of paths, you can install the contributed module <a href=":pathauto">Pathauto</a>. For more information, see the <a href=":path">online documentation for the Path module</a>.', array(':path' => 'https://www.drupal.org/documentation/modules/path', ':pathauto' => 'https://www.drupal.org/project/pathauto')) . '</p>';
+      $output .= '<p>' . t('The Path module allows you to specify an alias, or custom URL, for any existing internal system path. Aliases should not be confused with URL redirects, which allow you to forward a changed or inactive URL to a new URL. In addition to making URLs more readable, aliases also help search engines index content more effectively. Multiple aliases may be used for a single internal system path. To automate the aliasing of paths, you can install the contributed module <a href=":pathauto">Pathauto</a>. For more information, see the <a href=":path">online documentation for the Path module</a>.', [':path' => 'https://www.drupal.org/documentation/modules/path', ':pathauto' => 'https://www.drupal.org/project/pathauto']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Creating aliases') . '</dt>';
-      $output .= '<dd>' . t('If you create or edit a taxonomy term you can add an alias (for example <em>music/jazz</em>) in the field "URL alias". When creating or editing content you can add an alias (for example <em>about-us/team</em>) under the section "URL path settings" in the field "URL alias". Aliases for any other path can be added through the page <a href=":aliases">URL aliases</a>. To add aliases a user needs the permission <a href=":permissions">Create and edit URL aliases</a>.', array(':aliases' => \Drupal::url('path.admin_overview'), ':permissions' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-path')))) . '</dd>';
+      $output .= '<dd>' . t('If you create or edit a taxonomy term you can add an alias (for example <em>music/jazz</em>) in the field "URL alias". When creating or editing content you can add an alias (for example <em>about-us/team</em>) under the section "URL path settings" in the field "URL alias". Aliases for any other path can be added through the page <a href=":aliases">URL aliases</a>. To add aliases a user needs the permission <a href=":permissions">Create and edit URL aliases</a>.', [':aliases' => \Drupal::url('path.admin_overview'), ':permissions' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-path'])]) . '</dd>';
       $output .= '<dt>' . t('Managing aliases') . '</dt>';
-      $output .= '<dd>' . t('The Path module provides a way to search and view a <a href=":aliases">list of all aliases</a> that are in use on your website. Aliases can be added, edited and deleted through this list.', array(':aliases' => \Drupal::url('path.admin_overview'))) . '</dd>';
+      $output .= '<dd>' . t('The Path module provides a way to search and view a <a href=":aliases">list of all aliases</a> that are in use on your website. Aliases can be added, edited and deleted through this list.', [':aliases' => \Drupal::url('path.admin_overview')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -41,20 +41,20 @@ function path_help($route_name, RouteMatchInterface $route_match) {
  */
 function path_form_node_form_alter(&$form, FormStateInterface $form_state) {
   $node = $form_state->getFormObject()->getEntity();
-  $form['path_settings'] = array(
+  $form['path_settings'] = [
     '#type' => 'details',
     '#title' => t('URL path settings'),
     '#open' => !empty($form['path']['widget'][0]['alias']['#value']),
     '#group' => 'advanced',
     '#access' => !empty($form['path']['#access']) && $node->hasField('path') && $node->get('path')->access('edit'),
-    '#attributes' => array(
-      'class' => array('path-form'),
-    ),
-    '#attached' => array(
-      'library' => array('path/drupal.path'),
-    ),
+    '#attributes' => [
+      'class' => ['path-form'],
+    ],
+    '#attached' => [
+      'library' => ['path/drupal.path'],
+    ],
     '#weight' => 30,
-  );
+  ];
   $form['path']['#group'] = 'path_settings';
 }
 
@@ -66,10 +66,10 @@ function path_entity_base_field_info(EntityTypeInterface $entity_type) {
     $fields['path'] = BaseFieldDefinition::create('path')
       ->setLabel(t('URL alias'))
       ->setTranslatable(TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'path',
         'weight' => 30,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE)
       ->setComputed(TRUE);
 
diff --git a/core/modules/path/src/Controller/PathController.php b/core/modules/path/src/Controller/PathController.php
index 26b5d769476a635acc7e163ae2cb8805d447b630..51f88dd674e1930c76661c033a87357e7f391d16 100644
--- a/core/modules/path/src/Controller/PathController.php
+++ b/core/modules/path/src/Controller/PathController.php
@@ -69,63 +69,63 @@ public function adminOverview(Request $request) {
     // alias with a language.
     $multilanguage = ($this->moduleHandler()->moduleExists('language') || $this->aliasStorage->languageAliasExists());
 
-    $header = array();
-    $header[] = array('data' => $this->t('Alias'), 'field' => 'alias', 'sort' => 'asc');
-    $header[] = array('data' => $this->t('System'), 'field' => 'source');
+    $header = [];
+    $header[] = ['data' => $this->t('Alias'), 'field' => 'alias', 'sort' => 'asc'];
+    $header[] = ['data' => $this->t('System'), 'field' => 'source'];
     if ($multilanguage) {
-      $header[] = array('data' => $this->t('Language'), 'field' => 'langcode');
+      $header[] = ['data' => $this->t('Language'), 'field' => 'langcode'];
     }
     $header[] = $this->t('Operations');
 
-    $rows = array();
+    $rows = [];
     $destination = $this->getDestinationArray();
     foreach ($this->aliasStorage->getAliasesForAdminListing($header, $keys) as $data) {
-      $row = array();
+      $row = [];
       // @todo Should Path module store leading slashes? See
       //   https://www.drupal.org/node/2430593.
-      $row['data']['alias'] = $this->l(Unicode::truncate($data->alias, 50, FALSE, TRUE), Url::fromUserInput($data->source, array(
-        'attributes' => array('title' => $data->alias),
-      )));
-      $row['data']['source'] = $this->l(Unicode::truncate($data->source, 50, FALSE, TRUE), Url::fromUserInput($data->source, array(
+      $row['data']['alias'] = $this->l(Unicode::truncate($data->alias, 50, FALSE, TRUE), Url::fromUserInput($data->source, [
+        'attributes' => ['title' => $data->alias],
+      ]));
+      $row['data']['source'] = $this->l(Unicode::truncate($data->source, 50, FALSE, TRUE), Url::fromUserInput($data->source, [
         'alias' => TRUE,
-        'attributes' => array('title' => $data->source),
-      )));
+        'attributes' => ['title' => $data->source],
+      ]));
       if ($multilanguage) {
         $row['data']['language_name'] = $this->languageManager()->getLanguageName($data->langcode);
       }
 
-      $operations = array();
-      $operations['edit'] = array(
+      $operations = [];
+      $operations['edit'] = [
         'title' => $this->t('Edit'),
         'url' => Url::fromRoute('path.admin_edit', ['pid' => $data->pid], ['query' => $destination]),
-      );
-      $operations['delete'] = array(
+      ];
+      $operations['delete'] = [
         'title' => $this->t('Delete'),
         'url' => Url::fromRoute('path.delete', ['pid' => $data->pid], ['query' => $destination]),
-      );
-      $row['data']['operations'] = array(
-        'data' => array(
+      ];
+      $row['data']['operations'] = [
+        'data' => [
           '#type' => 'operations',
           '#links' => $operations,
-        ),
-      );
+        ],
+      ];
 
       // If the system path maps to a different URL alias, highlight this table
       // row to let the user know of old aliases.
       if ($data->alias != $this->aliasManager->getAliasByPath($data->source, $data->langcode)) {
-        $row['class'] = array('warning');
+        $row['class'] = ['warning'];
       }
 
       $rows[] = $row;
     }
 
-    $build['path_table'] = array(
+    $build['path_table'] = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
-      '#empty' => $this->t('No URL aliases available. <a href=":link">Add URL alias</a>.', array(':link' => $this->url('path.admin_add'))),
-    );
-    $build['path_pager'] = array('#type' => 'pager');
+      '#empty' => $this->t('No URL aliases available. <a href=":link">Add URL alias</a>.', [':link' => $this->url('path.admin_add')]),
+    ];
+    $build['path_pager'] = ['#type' => 'pager'];
 
     return $build;
   }
diff --git a/core/modules/path/src/Form/AddForm.php b/core/modules/path/src/Form/AddForm.php
index 5b7acef8bb2eb6414dc436ae31c5c5cdd3d6f948..8f8d4f6b143d327eb8333cd462891f5569318048 100644
--- a/core/modules/path/src/Form/AddForm.php
+++ b/core/modules/path/src/Form/AddForm.php
@@ -20,12 +20,12 @@ public function getFormId() {
    * {@inheritdoc}
    */
   protected function buildPath($pid) {
-    return array(
+    return [
       'source' => '',
       'alias' => '',
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
       'pid' => NULL,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/path/src/Form/DeleteForm.php b/core/modules/path/src/Form/DeleteForm.php
index 45cd9a28031a4fa79efff7914c20f542a90f3c12..b28fdc04eda824d588b3ce180027ce7346dce621 100644
--- a/core/modules/path/src/Form/DeleteForm.php
+++ b/core/modules/path/src/Form/DeleteForm.php
@@ -57,7 +57,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return t('Are you sure you want to delete path alias %title?', array('%title' => $this->pathAlias['alias']));
+    return t('Are you sure you want to delete path alias %title?', ['%title' => $this->pathAlias['alias']]);
   }
 
   /**
@@ -71,7 +71,7 @@ public function getCancelUrl() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state, $pid = NULL) {
-    $this->pathAlias = $this->aliasStorage->load(array('pid' => $pid));
+    $this->pathAlias = $this->aliasStorage->load(['pid' => $pid]);
 
     $form = parent::buildForm($form, $form_state);
 
@@ -82,7 +82,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $pid = NU
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    $this->aliasStorage->delete(array('pid' => $this->pathAlias['pid']));
+    $this->aliasStorage->delete(['pid' => $this->pathAlias['pid']]);
 
     $form_state->setRedirect('path.admin_overview');
   }
diff --git a/core/modules/path/src/Form/EditForm.php b/core/modules/path/src/Form/EditForm.php
index aeb285dad222e0759297c6707aa4921700bae9a8..7d4a3693022c8fbf1298e9fdfe845896fb2c6264 100644
--- a/core/modules/path/src/Form/EditForm.php
+++ b/core/modules/path/src/Form/EditForm.php
@@ -21,7 +21,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   protected function buildPath($pid) {
-    return $this->aliasStorage->load(array('pid' => $pid));
+    return $this->aliasStorage->load(['pid' => $pid]);
   }
 
   /**
@@ -31,27 +31,27 @@ public function buildForm(array $form, FormStateInterface $form_state, $pid = NU
     $form = parent::buildForm($form, $form_state, $pid);
 
     $form['#title'] = $this->path['alias'];
-    $form['pid'] = array(
+    $form['pid'] = [
       '#type' => 'hidden',
       '#value' => $this->path['pid'],
-    );
+    ];
 
-    $url = new Url('path.delete', array(
+    $url = new Url('path.delete', [
       'pid' => $this->path['pid'],
-    ));
+    ]);
 
     if ($this->getRequest()->query->has('destination')) {
       $url->setOption('query', $this->getDestinationArray());
     }
 
-    $form['actions']['delete'] = array(
+    $form['actions']['delete'] = [
       '#type' => 'link',
       '#title' => $this->t('Delete'),
       '#url' => $url,
-      '#attributes' => array(
-        'class' => array('button', 'button--danger'),
-      ),
-    );
+      '#attributes' => [
+        'class' => ['button', 'button--danger'],
+      ],
+    ];
 
     return $form;
   }
diff --git a/core/modules/path/src/Form/PathFilterForm.php b/core/modules/path/src/Form/PathFilterForm.php
index 6ac15855aa567e6eb935830f90eb91a8d6aa0e70..f7829061ecb3b87de66f4a784cdb9dfe094e846d 100644
--- a/core/modules/path/src/Form/PathFilterForm.php
+++ b/core/modules/path/src/Form/PathFilterForm.php
@@ -21,31 +21,31 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state, $keys = NULL) {
-    $form['#attributes'] = array('class' => array('search-form'));
-    $form['basic'] = array(
+    $form['#attributes'] = ['class' => ['search-form']];
+    $form['basic'] = [
       '#type' => 'details',
       '#title' => $this->t('Filter aliases'),
       '#open' => TRUE,
-      '#attributes' => array('class' => array('container-inline')),
-    );
-    $form['basic']['filter'] = array(
+      '#attributes' => ['class' => ['container-inline']],
+    ];
+    $form['basic']['filter'] = [
       '#type' => 'search',
       '#title' => 'Path alias',
       '#title_display' => 'invisible',
       '#default_value' => $keys,
       '#maxlength' => 128,
       '#size' => 25,
-    );
-    $form['basic']['submit'] = array(
+    ];
+    $form['basic']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Filter'),
-    );
+    ];
     if ($keys) {
-      $form['basic']['reset'] = array(
+      $form['basic']['reset'] = [
         '#type' => 'submit',
         '#value' => $this->t('Reset'),
-        '#submit' => array('::resetForm'),
-      );
+        '#submit' => ['::resetForm'],
+      ];
     }
     return $form;
   }
@@ -54,9 +54,9 @@ public function buildForm(array $form, FormStateInterface $form_state, $keys = N
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    $form_state->setRedirect('path.admin_overview_filter', array(), array(
-      'query' => array('search' => trim($form_state->getValue('filter'))),
-    ));
+    $form_state->setRedirect('path.admin_overview_filter', [], [
+      'query' => ['search' => trim($form_state->getValue('filter'))],
+    ]);
   }
 
   /**
diff --git a/core/modules/path/src/Form/PathFormBase.php b/core/modules/path/src/Form/PathFormBase.php
index dba3a3fa5d7bb19b3edbbfb425b0d3709bfb2e72..884d24fb8ac2ba01dcbd86bffce701de0ae0de6f 100644
--- a/core/modules/path/src/Form/PathFormBase.php
+++ b/core/modules/path/src/Form/PathFormBase.php
@@ -95,7 +95,7 @@ abstract protected function buildPath($pid);
    */
   public function buildForm(array $form, FormStateInterface $form_state, $pid = NULL) {
     $this->path = $this->buildPath($pid);
-    $form['source'] = array(
+    $form['source'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Existing system path'),
       '#default_value' => $this->path['source'],
@@ -104,8 +104,8 @@ public function buildForm(array $form, FormStateInterface $form_state, $pid = NU
       '#description' => $this->t('Specify the existing path you wish to alias. For example: /node/28, /forum/1, /taxonomy/term/1.'),
       '#field_prefix' => $this->requestContext->getCompleteBaseUrl(),
       '#required' => TRUE,
-    );
-    $form['alias'] = array(
+    ];
+    $form['alias'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Path alias'),
       '#default_value' => $this->path['alias'],
@@ -114,17 +114,17 @@ public function buildForm(array $form, FormStateInterface $form_state, $pid = NU
       '#description' => $this->t('Specify an alternative path by which this data can be accessed. For example, type "/about" when writing an about page.'),
       '#field_prefix' => $this->requestContext->getCompleteBaseUrl(),
       '#required' => TRUE,
-    );
+    ];
 
     // A hidden value unless language.module is enabled.
     if (\Drupal::moduleHandler()->moduleExists('language')) {
       $languages = \Drupal::languageManager()->getLanguages();
-      $language_options = array();
+      $language_options = [];
       foreach ($languages as $langcode => $language) {
         $language_options[$langcode] = $language->getName();
       }
 
-      $form['langcode'] = array(
+      $form['langcode'] = [
         '#type' => 'select',
         '#title' => $this->t('Language'),
         '#options' => $language_options,
@@ -133,21 +133,21 @@ public function buildForm(array $form, FormStateInterface $form_state, $pid = NU
         '#default_value' => $this->path['langcode'],
         '#weight' => -10,
         '#description' => $this->t('A path alias set for a specific language will always be used when displaying this page in that language, and takes precedence over path aliases set as <em>- None -</em>.'),
-      );
+      ];
     }
     else {
-      $form['langcode'] = array(
+      $form['langcode'] = [
         '#type' => 'value',
         '#value' => $this->path['langcode']
-      );
+      ];
     }
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
       '#button_type' => 'primary',
-    );
+    ];
 
     return $form;
   }
@@ -193,7 +193,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
 
 
     if (!$this->pathValidator->isValid(trim($source, '/'))) {
-      $form_state->setErrorByName('source', t("The path '@link_path' is either invalid or you do not have access to it.", array('@link_path' => $source)));
+      $form_state->setErrorByName('source', t("The path '@link_path' is either invalid or you do not have access to it.", ['@link_path' => $source]));
     }
   }
 
diff --git a/core/modules/path/src/Plugin/Field/FieldType/PathItem.php b/core/modules/path/src/Plugin/Field/FieldType/PathItem.php
index 239588fd5150bb0504f9616af9685720b355996c..4d8da7a8ad7ccd08c8ba081db6eb582a1adadd3c 100644
--- a/core/modules/path/src/Plugin/Field/FieldType/PathItem.php
+++ b/core/modules/path/src/Plugin/Field/FieldType/PathItem.php
@@ -37,7 +37,7 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array();
+    return [];
   }
 
   /**
@@ -62,7 +62,7 @@ public function postSave($update) {
     else {
       // Delete old alias if user erased it.
       if ($this->pid && !$this->alias) {
-        \Drupal::service('path.alias_storage')->delete(array('pid' => $this->pid));
+        \Drupal::service('path.alias_storage')->delete(['pid' => $this->pid]);
       }
       // Only save a non-empty alias.
       elseif ($this->alias) {
diff --git a/core/modules/path/src/Plugin/Field/FieldWidget/PathWidget.php b/core/modules/path/src/Plugin/Field/FieldWidget/PathWidget.php
index 366db885a6996b7a81872b457dd02c9533f463f4..b31af4694b743edabc614ddde6ae7c6283d61f95 100644
--- a/core/modules/path/src/Plugin/Field/FieldWidget/PathWidget.php
+++ b/core/modules/path/src/Plugin/Field/FieldWidget/PathWidget.php
@@ -26,47 +26,47 @@ class PathWidget extends WidgetBase {
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
     $entity = $items->getEntity();
-    $path = array();
+    $path = [];
     if (!$entity->isNew()) {
-      $conditions = array('source' => '/' . $entity->urlInfo()->getInternalPath());
+      $conditions = ['source' => '/' . $entity->urlInfo()->getInternalPath()];
       if ($items->getLangcode() != LanguageInterface::LANGCODE_NOT_SPECIFIED) {
         $conditions['langcode'] = $items->getLangcode();
       }
       $path = \Drupal::service('path.alias_storage')->load($conditions);
       if ($path === FALSE) {
-        $path = array();
+        $path = [];
       }
     }
-    $path += array(
+    $path += [
       'pid' => NULL,
       'source' => !$entity->isNew() ? '/' . $entity->urlInfo()->getInternalPath() : NULL,
       'alias' => '',
       'langcode' => $items->getLangcode(),
-    );
+    ];
 
-    $element += array(
-      '#element_validate' => array(array(get_class($this), 'validateFormElement')),
-    );
-    $element['alias'] = array(
+    $element += [
+      '#element_validate' => [[get_class($this), 'validateFormElement']],
+    ];
+    $element['alias'] = [
       '#type' => 'textfield',
       '#title' => $element['#title'],
       '#default_value' => $path['alias'],
       '#required' => $element['#required'],
       '#maxlength' => 255,
       '#description' => $this->t('Specify an alternative path by which this data can be accessed. For example, type "/about" when writing an about page.'),
-    );
-    $element['pid'] = array(
+    ];
+    $element['pid'] = [
       '#type' => 'value',
       '#value' => $path['pid'],
-    );
-    $element['source'] = array(
+    ];
+    $element['source'] = [
       '#type' => 'value',
       '#value' => $path['source'],
-    );
-    $element['langcode'] = array(
+    ];
+    $element['langcode'] = [
       '#type' => 'value',
       '#value' => $path['langcode'],
-    );
+    ];
     return $element;
   }
 
diff --git a/core/modules/path/src/Plugin/migrate/destination/UrlAlias.php b/core/modules/path/src/Plugin/migrate/destination/UrlAlias.php
index a71bcc9cbbaa35a22a15e2746e041d121b8421d8..385ee4ba46521afbac56310aa76b894d55d6fd0e 100644
--- a/core/modules/path/src/Plugin/migrate/destination/UrlAlias.php
+++ b/core/modules/path/src/Plugin/migrate/destination/UrlAlias.php
@@ -58,7 +58,7 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     $source = $row->getDestinationProperty('source');
     $alias = $row->getDestinationProperty('alias');
     $langcode = $row->getDestinationProperty('langcode');
@@ -75,7 +75,7 @@ public function import(Row $row, array $old_destination_id_values = array()) {
 
     $path = $this->aliasStorage->save($source, $alias, $langcode, $pid);
 
-    return array($path['pid']);
+    return [$path['pid']];
   }
 
   /**
diff --git a/core/modules/path/src/Plugin/migrate/source/UrlAliasBase.php b/core/modules/path/src/Plugin/migrate/source/UrlAliasBase.php
index 3529ce28330f221235d8d001b47e5580e70e475c..7714cbd1c4fd2e6e11c708a1bedce4e4d4ab9d3d 100644
--- a/core/modules/path/src/Plugin/migrate/source/UrlAliasBase.php
+++ b/core/modules/path/src/Plugin/migrate/source/UrlAliasBase.php
@@ -24,10 +24,10 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'pid' => $this->t('The numeric identifier of the path alias.'),
       'language' => $this->t('The language code of the URL alias.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/path/src/Tests/PathAdminTest.php b/core/modules/path/src/Tests/PathAdminTest.php
index 906ce643341b6d72c82589673485fa3f9bbca6a2..67f41bd2edb149e4793c715e9cf589da8d6ead7a 100644
--- a/core/modules/path/src/Tests/PathAdminTest.php
+++ b/core/modules/path/src/Tests/PathAdminTest.php
@@ -14,13 +14,13 @@ class PathAdminTest extends PathTestBase {
    *
    * @var array
    */
-  public static $modules = array('path');
+  public static $modules = ['path'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create test user and log in.
-    $web_user = $this->drupalCreateUser(array('create page content', 'edit own page content', 'administer url aliases', 'create url aliases'));
+    $web_user = $this->drupalCreateUser(['create page content', 'edit own page content', 'administer url aliases', 'create url aliases']);
     $this->drupalLogin($web_user);
   }
 
@@ -35,63 +35,63 @@ public function testPathFiltering() {
 
     // Create aliases.
     $alias1 = '/' . $this->randomMachineName(8);
-    $edit = array(
+    $edit = [
       'source' => '/node/' . $node1->id(),
       'alias' => $alias1,
-    );
+    ];
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
 
     $alias2 = '/' . $this->randomMachineName(8);
-    $edit = array(
+    $edit = [
       'source' => '/node/' . $node2->id(),
       'alias' => $alias2,
-    );
+    ];
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
 
     $alias3 = '/' . $this->randomMachineName(4) . '/' . $this->randomMachineName(4);
-    $edit = array(
+    $edit = [
       'source' => '/node/' . $node3->id(),
       'alias' => $alias3,
-    );
+    ];
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
 
     // Filter by the first alias.
-    $edit = array(
+    $edit = [
       'filter' => $alias1,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Filter'));
     $this->assertLinkByHref($alias1);
     $this->assertNoLinkByHref($alias2);
     $this->assertNoLinkByHref($alias3);
 
     // Filter by the second alias.
-    $edit = array(
+    $edit = [
       'filter' => $alias2,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Filter'));
     $this->assertNoLinkByHref($alias1);
     $this->assertLinkByHref($alias2);
     $this->assertNoLinkByHref($alias3);
 
     // Filter by the third alias which has a slash.
-    $edit = array(
+    $edit = [
       'filter' => $alias3,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Filter'));
     $this->assertNoLinkByHref($alias1);
     $this->assertNoLinkByHref($alias2);
     $this->assertLinkByHref($alias3);
 
     // Filter by a random string with a different length.
-    $edit = array(
+    $edit = [
       'filter' => $this->randomMachineName(10),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Filter'));
     $this->assertNoLinkByHref($alias1);
     $this->assertNoLinkByHref($alias2);
 
     // Reset the filter.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm(NULL, $edit, t('Reset'));
     $this->assertLinkByHref($alias1);
     $this->assertLinkByHref($alias2);
diff --git a/core/modules/path/src/Tests/PathNodeFormTest.php b/core/modules/path/src/Tests/PathNodeFormTest.php
index 79b43a773071efd8155abdb06040e957949d02a5..016ae04f287dbbed6e50b870d31854d9ebe76596 100644
--- a/core/modules/path/src/Tests/PathNodeFormTest.php
+++ b/core/modules/path/src/Tests/PathNodeFormTest.php
@@ -14,13 +14,13 @@ class PathNodeFormTest extends PathTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'path');
+  public static $modules = ['node', 'path'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create test user and log in.
-    $web_user = $this->drupalCreateUser(array('create page content', 'create url aliases'));
+    $web_user = $this->drupalCreateUser(['create page content', 'create url aliases']);
     $this->drupalLogin($web_user);
   }
 
diff --git a/core/modules/path/src/Tests/PathTaxonomyTermTest.php b/core/modules/path/src/Tests/PathTaxonomyTermTest.php
index f62fb6c4c7c7c91f8e0a56ec9b8fb75082dda639..b6a853e97a6bf2584677f6f238e3a7889ca21af9 100644
--- a/core/modules/path/src/Tests/PathTaxonomyTermTest.php
+++ b/core/modules/path/src/Tests/PathTaxonomyTermTest.php
@@ -16,7 +16,7 @@ class PathTaxonomyTermTest extends PathTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   protected function setUp() {
     parent::setUp();
@@ -29,7 +29,7 @@ protected function setUp() {
     $vocabulary->save();
 
     // Create and log in user.
-    $web_user = $this->drupalCreateUser(array('administer url aliases', 'administer taxonomy', 'access administration pages'));
+    $web_user = $this->drupalCreateUser(['administer url aliases', 'administer taxonomy', 'access administration pages']);
     $this->drupalLogin($web_user);
   }
 
@@ -40,13 +40,13 @@ function testTermAlias() {
     // Create a term in the default 'Tags' vocabulary with URL alias.
     $vocabulary = Vocabulary::load('tags');
     $description = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'name[0][value]' => $this->randomMachineName(),
       'description[0][value]' => $description,
       'path[0][alias]' => '/' . $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $vocabulary->id() . '/add', $edit, t('Save'));
-    $tid = db_query("SELECT tid FROM {taxonomy_term_field_data} WHERE name = :name AND default_langcode = 1", array(':name' => $edit['name[0][value]']))->fetchField();
+    $tid = db_query("SELECT tid FROM {taxonomy_term_field_data} WHERE name = :name AND default_langcode = 1", [':name' => $edit['name[0][value]']])->fetchField();
 
     // Confirm that the alias works.
     $this->drupalGet($edit['path[0][alias]']);
@@ -59,7 +59,7 @@ function testTermAlias() {
     $this->assertTrue(!empty($elements), 'Term page contains shortlink URL.');
 
     // Change the term's URL alias.
-    $edit2 = array();
+    $edit2 = [];
     $edit2['path[0][alias]'] = '/' . $this->randomMachineName();
     $this->drupalPostForm('taxonomy/term/' . $tid . '/edit', $edit2, t('Save'));
 
@@ -73,7 +73,7 @@ function testTermAlias() {
     $this->assertResponse(404, 'Old URL alias returns 404.');
 
     // Remove the term's URL alias.
-    $edit3 = array();
+    $edit3 = [];
     $edit3['path[0][alias]'] = '';
     $this->drupalPostForm('taxonomy/term/' . $tid . '/edit', $edit3, t('Save'));
 
diff --git a/core/modules/path/src/Tests/PathTestBase.php b/core/modules/path/src/Tests/PathTestBase.php
index 53496768a8dfc8e2adb286357ef2c197a078b67c..33cf5aba9dcd2f1a92f113cceee822dbd924235e 100644
--- a/core/modules/path/src/Tests/PathTestBase.php
+++ b/core/modules/path/src/Tests/PathTestBase.php
@@ -17,15 +17,15 @@ abstract class PathTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'path');
+  public static $modules = ['node', 'path'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
   }
 
diff --git a/core/modules/path/tests/src/Functional/PathAliasTest.php b/core/modules/path/tests/src/Functional/PathAliasTest.php
index 5127853ea4459fe5ee40a8263cb76deb3d1acd72..9684aa95ffccd5ea3072570340554cae8f66580c 100644
--- a/core/modules/path/tests/src/Functional/PathAliasTest.php
+++ b/core/modules/path/tests/src/Functional/PathAliasTest.php
@@ -19,13 +19,13 @@ class PathAliasTest extends PathTestBase {
    *
    * @var array
    */
-  public static $modules = array('path');
+  public static $modules = ['path'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create test user and log in.
-    $web_user = $this->drupalCreateUser(array('create page content', 'edit own page content', 'administer url aliases', 'create url aliases'));
+    $web_user = $this->drupalCreateUser(['create page content', 'edit own page content', 'administer url aliases', 'create url aliases']);
     $this->drupalLogin($web_user);
   }
 
@@ -37,7 +37,7 @@ function testPathCache() {
     $node1 = $this->drupalCreateNode();
 
     // Create alias.
-    $edit = array();
+    $edit = [];
     $edit['source'] = '/node/' . $node1->id();
     $edit['alias'] = '/' . $this->randomMachineName(8);
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
@@ -51,7 +51,7 @@ function testPathCache() {
     // created.
     \Drupal::cache('data')->deleteAll();
     // Make sure the path is not converted to the alias.
-    $this->drupalGet(trim($edit['source'], '/'), array('alias' => TRUE));
+    $this->drupalGet(trim($edit['source'], '/'), ['alias' => TRUE]);
     $this->assertTrue(\Drupal::cache('data')->get('preload-paths:' . $edit['source']), 'Cache entry was created.');
 
     // Visit the alias for the node and confirm a cache entry is created.
@@ -70,7 +70,7 @@ function testAdminAlias() {
     $node1 = $this->drupalCreateNode();
 
     // Create alias.
-    $edit = array();
+    $edit = [];
     $edit['source'] = '/node/' . $node1->id();
     $edit['alias'] = '/' . $this->getRandomGenerator()->word(8);
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
@@ -129,7 +129,7 @@ function testAdminAlias() {
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
 
     // Confirm no duplicate was created.
-    $this->assertRaw(t('The alias %alias is already in use in this language.', array('%alias' => $edit['alias'])), 'Attempt to move alias was rejected.');
+    $this->assertRaw(t('The alias %alias is already in use in this language.', ['%alias' => $edit['alias']]), 'Attempt to move alias was rejected.');
 
     $edit_upper = $edit;
     $edit_upper['alias'] = Unicode::strtoupper($edit['alias']);
@@ -142,8 +142,8 @@ function testAdminAlias() {
     // Delete alias.
     $this->drupalGet('admin/config/search/path/edit/' . $pid);
     $this->clickLink(t('Delete'));
-    $this->assertRaw(t('Are you sure you want to delete path alias %name?', array('%name' => $edit['alias'])));
-    $this->drupalPostForm(NULL, array(), t('Confirm'));
+    $this->assertRaw(t('Are you sure you want to delete path alias %name?', ['%name' => $edit['alias']]));
+    $this->drupalPostForm(NULL, [], t('Confirm'));
 
     // Confirm that the alias no longer works.
     $this->drupalGet($edit['alias']);
@@ -151,7 +151,7 @@ function testAdminAlias() {
     $this->assertResponse(404);
 
     // Create a really long alias.
-    $edit = array();
+    $edit = [];
     $edit['source'] = '/node/' . $node1->id();
     $alias = '/' . $this->randomMachineName(128);
     $edit['alias'] = $alias;
@@ -166,7 +166,7 @@ function testAdminAlias() {
     $node3 = $this->drupalCreateNode();
 
     // Create absolute path alias.
-    $edit = array();
+    $edit = [];
     $edit['source'] = '/node/' . $node3->id();
     $node3_alias = '/' . $this->randomMachineName(8);
     $edit['alias'] = $node3_alias;
@@ -176,7 +176,7 @@ function testAdminAlias() {
     $node4 = $this->drupalCreateNode();
 
     // Create alias with trailing slash.
-    $edit = array();
+    $edit = [];
     $edit['source'] = '/node/' . $node4->id();
     $node4_alias = '/' . $this->randomMachineName(8);
     $edit['alias'] = $node4_alias . '/';
@@ -205,12 +205,12 @@ function testAdminAlias() {
     $edit['alias'] = $node4_alias;
     $edit['source'] = '/node/' . $node3->id();
     $this->drupalPostForm('admin/config/search/path/edit/' . $pid, $edit, t('Save'));
-    $this->assertRaw(t('The alias %alias is already in use in this language.', array('%alias' => $edit['alias'])));
+    $this->assertRaw(t('The alias %alias is already in use in this language.', ['%alias' => $edit['alias']]));
 
     // Create an alias without a starting slash.
     $node5 = $this->drupalCreateNode();
 
-    $edit = array();
+    $edit = [];
     $edit['source'] = 'node/' . $node5->id();
     $node5_alias = $this->randomMachineName(8);
     $edit['alias'] = $node5_alias . '/';
@@ -229,7 +229,7 @@ function testNodeAlias() {
     $node1 = $this->drupalCreateNode();
 
     // Create alias.
-    $edit = array();
+    $edit = [];
     $edit['path[0][alias]'] = '/' . $this->randomMachineName(8);
     $this->drupalPostForm('node/' . $node1->id() . '/edit', $edit, t('Save'));
 
@@ -284,7 +284,7 @@ function testNodeAlias() {
     $this->assertText(t('The alias is already in use.'), 'Attempt to moved alias was rejected.');
 
     // Delete alias.
-    $this->drupalPostForm('node/' . $node1->id() . '/edit', array('path[0][alias]' => ''), t('Save'));
+    $this->drupalPostForm('node/' . $node1->id() . '/edit', ['path[0][alias]' => ''], t('Save'));
 
     // Confirm that the alias no longer works.
     $this->drupalGet($edit['path[0][alias]']);
@@ -295,7 +295,7 @@ function testNodeAlias() {
     $node3 = $this->drupalCreateNode();
 
     // Set its path alias to an absolute path.
-    $edit = array('path[0][alias]' => '/' . $this->randomMachineName(8));
+    $edit = ['path[0][alias]' => '/' . $this->randomMachineName(8)];
     $this->drupalPostForm('node/' . $node3->id() . '/edit', $edit, t('Save'));
 
     // Confirm that the alias was converted to a relative path.
@@ -307,7 +307,7 @@ function testNodeAlias() {
     $node4 = $this->drupalCreateNode();
 
     // Set its path alias to have a trailing slash.
-    $edit = array('path[0][alias]' => '/' . $this->randomMachineName(8) . '/');
+    $edit = ['path[0][alias]' => '/' . $this->randomMachineName(8) . '/'];
     $this->drupalPostForm('node/' . $node4->id() . '/edit', $edit, t('Save'));
 
     // Confirm that the alias was converted to a relative path.
@@ -319,7 +319,7 @@ function testNodeAlias() {
     $node5 = $this->drupalCreateNode();
 
     // Set a path alias.
-    $edit = array('path[0][alias]' => '/' . $this->randomMachineName(8));
+    $edit = ['path[0][alias]' => '/' . $this->randomMachineName(8)];
     $this->drupalPostForm('node/' . $node5->id() . '/edit', $edit, t('Save'));
 
     // Delete the node and check that the path alias is also deleted.
@@ -338,7 +338,7 @@ function testNodeAlias() {
    *   Integer representing the path ID.
    */
   function getPID($alias) {
-    return db_query("SELECT pid FROM {url_alias} WHERE alias = :alias", array(':alias' => $alias))->fetchField();
+    return db_query("SELECT pid FROM {url_alias} WHERE alias = :alias", [':alias' => $alias])->fetchField();
   }
 
   /**
@@ -347,7 +347,7 @@ function getPID($alias) {
   function testDuplicateNodeAlias() {
     // Create one node with a random alias.
     $node_one = $this->drupalCreateNode();
-    $edit = array();
+    $edit = [];
     $edit['path[0][alias]'] = '/' . $this->randomMachineName();
     $this->drupalPostForm('node/' . $node_one->id() . '/edit', $edit, t('Save'));
 
diff --git a/core/modules/path/tests/src/Functional/PathLanguageTest.php b/core/modules/path/tests/src/Functional/PathLanguageTest.php
index 08fe7a4ad24ccd31c1ed3c71120b27dc009368b3..cd56557ea79995a51b558db12cf962e41a65345b 100644
--- a/core/modules/path/tests/src/Functional/PathLanguageTest.php
+++ b/core/modules/path/tests/src/Functional/PathLanguageTest.php
@@ -14,7 +14,7 @@ class PathLanguageTest extends PathTestBase {
    *
    * @var array
    */
-  public static $modules = array('path', 'locale', 'locale_test', 'content_translation');
+  public static $modules = ['path', 'locale', 'locale_test', 'content_translation'];
 
   /**
    * An user with permissions to administer content types.
@@ -26,7 +26,7 @@ class PathLanguageTest extends PathTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $permissions = array(
+    $permissions = [
       'access administration pages',
       'administer content translation',
       'administer content types',
@@ -37,29 +37,29 @@ protected function setUp() {
       'create url aliases',
       'edit any page content',
       'translate any entity',
-    );
+    ];
     // Create and log in user.
     $this->webUser = $this->drupalCreateUser($permissions);
     $this->drupalLogin($this->webUser);
 
     // Enable French language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'fr';
 
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Enable URL language detection and selection.
-    $edit = array('language_interface[enabled][language-url]' => 1);
+    $edit = ['language_interface[enabled][language-url]' => 1];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Enable translation for page node.
-    $edit = array(
+    $edit = [
       'entity_types[node]' => 1,
       'settings[node][page][translatable]' => 1,
       'settings[node][page][fields][path]' => 1,
       'settings[node][page][fields][body]' => 1,
       'settings[node][page][settings][language][language_alterable]' => 1,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
     \Drupal::entityManager()->clearCachedDefinitions();
 
@@ -73,11 +73,11 @@ protected function setUp() {
    */
   function testAliasTranslation() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
-    $english_node = $this->drupalCreateNode(array('type' => 'page', 'langcode' => 'en'));
+    $english_node = $this->drupalCreateNode(['type' => 'page', 'langcode' => 'en']);
     $english_alias = $this->randomMachineName();
 
     // Edit the node to set language and path.
-    $edit = array();
+    $edit = [];
     $edit['path[0][alias]'] = '/' . $english_alias;
     $this->drupalPostForm('node/' . $english_node->id() . '/edit', $edit, t('Save'));
 
@@ -89,7 +89,7 @@ function testAliasTranslation() {
     $this->drupalGet('node/' . $english_node->id() . '/translations');
     $this->clickLink(t('Add'));
 
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $edit['body[0][value]'] = $this->randomMachineName();
     $french_alias = $this->randomMachineName();
@@ -105,7 +105,7 @@ function testAliasTranslation() {
     $languages = $this->container->get('language_manager')->getLanguages();
 
     // Ensure the node was created.
-    $node_storage->resetCache(array($english_node->id()));
+    $node_storage->resetCache([$english_node->id()]);
     $english_node = $node_storage->load($english_node->id());
     $english_node_french_translation = $english_node->getTranslation('fr');
     $this->assertTrue($english_node->hasTranslation('fr'), 'Node found in database.');
@@ -118,22 +118,22 @@ function testAliasTranslation() {
     // many levels, and we need to clear those caches.
     $this->container->get('language_manager')->reset();
     $languages = $this->container->get('language_manager')->getLanguages();
-    $url = $english_node_french_translation->url('canonical', array('language' => $languages['fr']));
+    $url = $english_node_french_translation->url('canonical', ['language' => $languages['fr']]);
 
     $this->assertTrue(strpos($url, $edit['path[0][alias]']), 'URL contains the path alias.');
 
     // Confirm that the alias works even when changing language negotiation
     // options. Enable User language detection and selection over URL one.
-    $edit = array(
+    $edit = [
       'language_interface[enabled][language-user]' => 1,
       'language_interface[weight][language-user]' => -9,
       'language_interface[enabled][language-url]' => 1,
       'language_interface[weight][language-url]' => -8,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Change user language preference.
-    $edit = array('preferred_langcode' => 'fr');
+    $edit = ['preferred_langcode' => 'fr'];
     $this->drupalPostForm("user/" . $this->webUser->id() . "/edit", $edit, t('Save'));
 
     // Check that the English alias works. In this situation French is the
@@ -152,7 +152,7 @@ function testAliasTranslation() {
     $this->assertText($english_node_french_translation->body->value, 'Alias for French translation works.');
 
     // Disable URL language negotiation.
-    $edit = array('language_interface[enabled][language-url]' => FALSE);
+    $edit = ['language_interface[enabled][language-url]' => FALSE];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
 
     // Check that the English alias still works.
diff --git a/core/modules/path/tests/src/Functional/PathLanguageUiTest.php b/core/modules/path/tests/src/Functional/PathLanguageUiTest.php
index f17bb60085687bc3be3a884c17d870c56fc10ecd..9bad3485e28ea406805964a1c2683f17d618befb 100644
--- a/core/modules/path/tests/src/Functional/PathLanguageUiTest.php
+++ b/core/modules/path/tests/src/Functional/PathLanguageUiTest.php
@@ -14,23 +14,23 @@ class PathLanguageUiTest extends PathTestBase {
    *
    * @var array
    */
-  public static $modules = array('path', 'locale', 'locale_test');
+  public static $modules = ['path', 'locale', 'locale_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $web_user = $this->drupalCreateUser(array('edit any page content', 'create page content', 'administer url aliases', 'create url aliases', 'administer languages', 'access administration pages'));
+    $web_user = $this->drupalCreateUser(['edit any page content', 'create page content', 'administer url aliases', 'create url aliases', 'administer languages', 'access administration pages']);
     $this->drupalLogin($web_user);
 
     // Enable French language.
-    $edit = array();
+    $edit = [];
     $edit['predefined_langcode'] = 'fr';
 
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
 
     // Enable URL language detection and selection.
-    $edit = array('language_interface[enabled][language-url]' => 1);
+    $edit = ['language_interface[enabled][language-url]' => 1];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
   }
 
@@ -39,7 +39,7 @@ protected function setUp() {
    */
   function testLanguageNeutralUrl() {
     $name = $this->randomMachineName(8);
-    $edit = array();
+    $edit = [];
     $edit['source'] = '/admin/config/search/path';
     $edit['alias'] = '/' . $name;
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
@@ -53,7 +53,7 @@ function testLanguageNeutralUrl() {
    */
   function testDefaultLanguageUrl() {
     $name = $this->randomMachineName(8);
-    $edit = array();
+    $edit = [];
     $edit['source'] = '/admin/config/search/path';
     $edit['alias'] = '/' . $name;
     $edit['langcode'] = 'en';
@@ -68,7 +68,7 @@ function testDefaultLanguageUrl() {
    */
   function testNonDefaultUrl() {
     $name = $this->randomMachineName(8);
-    $edit = array();
+    $edit = [];
     $edit['source'] = '/admin/config/search/path';
     $edit['alias'] = '/' . $name;
     $edit['langcode'] = 'fr';
diff --git a/core/modules/path/tests/src/Functional/PathTestBase.php b/core/modules/path/tests/src/Functional/PathTestBase.php
index ef83396fd11a0a60167ca6d7e590ea9676d639a4..d4b8826d58d59be0272bad48c217007c841abd59 100644
--- a/core/modules/path/tests/src/Functional/PathTestBase.php
+++ b/core/modules/path/tests/src/Functional/PathTestBase.php
@@ -14,15 +14,15 @@ abstract class PathTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'path');
+  public static $modules = ['node', 'path'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
   }
 
diff --git a/core/modules/path/tests/src/Kernel/Migrate/d6/MigrateUrlAliasTest.php b/core/modules/path/tests/src/Kernel/Migrate/d6/MigrateUrlAliasTest.php
index 8df5392fc4d0a18ddf5309984837d529981ef4b1..0580b830cc2628e507b16ee8442ccebe3f653104 100644
--- a/core/modules/path/tests/src/Kernel/Migrate/d6/MigrateUrlAliasTest.php
+++ b/core/modules/path/tests/src/Kernel/Migrate/d6/MigrateUrlAliasTest.php
@@ -61,46 +61,46 @@ private function assertPath($pid, $conditions, $path) {
   public function testUrlAlias() {
     $id_map = $this->getMigration('d6_url_alias')->getIdMap();
     // Test that the field exists.
-    $conditions = array(
+    $conditions = [
       'source' => '/node/1',
       'alias' => '/alias-one',
       'langcode' => 'af',
-    );
+    ];
     $path = \Drupal::service('path.alias_storage')->load($conditions);
     $this->assertPath('1', $conditions, $path);
-    $this->assertIdentical($id_map->lookupDestinationID(array($path['pid'])), array('1'), "Test IdMap");
+    $this->assertIdentical($id_map->lookupDestinationID([$path['pid']]), ['1'], "Test IdMap");
 
-    $conditions = array(
+    $conditions = [
       'source' => '/node/2',
       'alias' => '/alias-two',
       'langcode' => 'en',
-    );
+    ];
     $path = \Drupal::service('path.alias_storage')->load($conditions);
     $this->assertPath('2', $conditions, $path);
 
     // Test that we can re-import using the UrlAlias destination.
     Database::getConnection('default', 'migrate')
       ->update('url_alias')
-      ->fields(array('dst' => 'new-url-alias'))
+      ->fields(['dst' => 'new-url-alias'])
       ->condition('src', 'node/2')
       ->execute();
 
     \Drupal::database()
       ->update($id_map->mapTableName())
-      ->fields(array('source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE))
+      ->fields(['source_row_status' => MigrateIdMapInterface::STATUS_NEEDS_UPDATE])
       ->execute();
     $migration = $this->getMigration('d6_url_alias');
     $this->executeMigration($migration);
 
-    $path = \Drupal::service('path.alias_storage')->load(array('pid' => $path['pid']));
+    $path = \Drupal::service('path.alias_storage')->load(['pid' => $path['pid']]);
     $conditions['alias'] = '/new-url-alias';
     $this->assertPath('2', $conditions, $path);
 
-    $conditions = array(
+    $conditions = [
       'source' => '/node/3',
       'alias' => '/alias-three',
       'langcode' => 'und',
-    );
+    ];
     $path = \Drupal::service('path.alias_storage')->load($conditions);
     $this->assertPath('3', $conditions, $path);
   }
diff --git a/core/modules/path/tests/src/Kernel/PathNoCanonicalLinkTest.php b/core/modules/path/tests/src/Kernel/PathNoCanonicalLinkTest.php
index df64a5c2e8b0db6d19ebea6c4d3625b3701a17f0..602e84f42f6884c37a31f3d92846048ddb6b76c1 100644
--- a/core/modules/path/tests/src/Kernel/PathNoCanonicalLinkTest.php
+++ b/core/modules/path/tests/src/Kernel/PathNoCanonicalLinkTest.php
@@ -18,7 +18,7 @@ class PathNoCanonicalLinkTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('path', 'content_translation_test', 'language', 'entity_test', 'user', 'system');
+  public static $modules = ['path', 'content_translation_test', 'language', 'entity_test', 'user', 'system'];
 
   protected function setUp() {
     parent::setUp();
diff --git a/core/modules/path/tests/src/Unit/Field/PathFieldDefinitionTest.php b/core/modules/path/tests/src/Unit/Field/PathFieldDefinitionTest.php
index 0bb55ae5e8d17d276521ce35acadba1e40ecb024..7ef7c2f37cf06fa9baeaa065743dca4bdffc476c 100644
--- a/core/modules/path/tests/src/Unit/Field/PathFieldDefinitionTest.php
+++ b/core/modules/path/tests/src/Unit/Field/PathFieldDefinitionTest.php
@@ -21,7 +21,7 @@ protected function getPluginId() {
    * {@inheritdoc}
    */
   protected function getModuleAndPath() {
-    return array('path', dirname(dirname(dirname(dirname(__DIR__)))));
+    return ['path', dirname(dirname(dirname(dirname(__DIR__))))];
   }
 
   /**
@@ -29,7 +29,7 @@ protected function getModuleAndPath() {
    * @covers ::getSchema
    */
   public function testGetColumns() {
-    $this->assertSame(array(), $this->definition->getColumns());
+    $this->assertSame([], $this->definition->getColumns());
   }
 
 }
diff --git a/core/modules/quickedit/quickedit.api.php b/core/modules/quickedit/quickedit.api.php
index 8e6a2a8eef93545785056623008f84e27011859a..581b5616ead679ce24736c20c3a1fb41c8371b95 100644
--- a/core/modules/quickedit/quickedit.api.php
+++ b/core/modules/quickedit/quickedit.api.php
@@ -70,11 +70,11 @@ function hook_quickedit_editor_alter(&$editors) {
  * @see \Drupal\Core\Field\FieldItemListInterface::view()
  */
 function hook_quickedit_render_field(Drupal\Core\Entity\EntityInterface $entity, $field_name, $view_mode_id, $langcode) {
-  return array(
+  return [
     '#prefix' => '<div class="example-markup">',
     'field' => $entity->getTranslation($langcode)->get($field_name)->view($view_mode_id),
     '#suffix' => '</div>',
-  );
+  ];
 }
 
 /**
diff --git a/core/modules/quickedit/quickedit.module b/core/modules/quickedit/quickedit.module
index be401158d17f144fb8adb10488703704d0edf647..051b94834ae5e40e6e7ce48d702b5e71b68d103d 100644
--- a/core/modules/quickedit/quickedit.module
+++ b/core/modules/quickedit/quickedit.module
@@ -22,12 +22,12 @@ function quickedit_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.quickedit':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Quick Edit module allows users with the <a href=":quickedit_permission">Access in-place editing</a> and <a href=":contextual_permission">Use contextual links</a> permissions to edit field content without visiting a separate page. For more information, see the <a href=":handbook_url">online documentation for the Quick Edit module</a>.', array(':handbook_url' => 'https://www.drupal.org/documentation/modules/edit', ':quickedit_permission' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-quickedit')), ':contextual_permission' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-contextual')))) . '</p>';
+      $output .= '<p>' . t('The Quick Edit module allows users with the <a href=":quickedit_permission">Access in-place editing</a> and <a href=":contextual_permission">Use contextual links</a> permissions to edit field content without visiting a separate page. For more information, see the <a href=":handbook_url">online documentation for the Quick Edit module</a>.', [':handbook_url' => 'https://www.drupal.org/documentation/modules/edit', ':quickedit_permission' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-quickedit']), ':contextual_permission' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-contextual'])]) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Editing content in-place') . '</dt>';
       $output .= '<dd>';
-      $output .= '<p>' . t('To edit content in place, you need to activate quick edit mode for a content item. Activate quick edit mode by choosing Quick edit from the contextual links for an area displaying the content (see the <a href=":contextual">Contextual Links module help</a> for more information about how to use contextual links).', array(':contextual' => \Drupal::url('help.page', array('name' => 'contextual')))) . '</p>';
+      $output .= '<p>' . t('To edit content in place, you need to activate quick edit mode for a content item. Activate quick edit mode by choosing Quick edit from the contextual links for an area displaying the content (see the <a href=":contextual">Contextual Links module help</a> for more information about how to use contextual links).', [':contextual' => \Drupal::url('help.page', ['name' => 'contextual'])]) . '</p>';
       $output .= '<p>' . t('Once quick edit mode is activated, you will be able to edit the individual fields of your content. In the default theme, with a JavaScript-enabled browser and a mouse, the output of different fields in your content is outlined in blue, a pop-up gives the field name as you hover over the field output, and clicking on a field activates the editor. Closing the pop-up window ends quick edit mode.') . '</p>';
       $output .= '</dd>';
       $output .= '</dl>';
@@ -108,7 +108,7 @@ function quickedit_field_formatter_info_alter(&$info) {
   foreach ($info as $key => $settings) {
     // Set in-place editor to 'form' if none is supplied.
     if (empty($settings['quickedit'])) {
-      $info[$key]['quickedit'] = array('editor' => 'form');
+      $info[$key]['quickedit'] = ['editor' => 'form'];
     }
   }
 }
diff --git a/core/modules/quickedit/src/Ajax/FieldFormSavedCommand.php b/core/modules/quickedit/src/Ajax/FieldFormSavedCommand.php
index 7ea42b43447a32f4c0f6724eeeb9452461fb719c..1e84b0eb191933a02d58e8e68f05d8688f3490c7 100644
--- a/core/modules/quickedit/src/Ajax/FieldFormSavedCommand.php
+++ b/core/modules/quickedit/src/Ajax/FieldFormSavedCommand.php
@@ -27,7 +27,7 @@ class FieldFormSavedCommand extends BaseCommand {
    *   The same re-rendered edited field, but in different view modes, for other
    *   instances of the same field on the user's page. Keyed by view mode.
    */
-  public function __construct($data, $other_view_modes = array()) {
+  public function __construct($data, $other_view_modes = []) {
     parent::__construct('quickeditFieldFormSaved', $data);
 
     $this->other_view_modes = $other_view_modes;
@@ -37,11 +37,11 @@ public function __construct($data, $other_view_modes = array()) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => $this->command,
       'data' => $this->data,
       'other_view_modes' => $this->other_view_modes,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/quickedit/src/EditorSelector.php b/core/modules/quickedit/src/EditorSelector.php
index a531b1a49a53dbd9a639c244a7c807fa1b3136c4..9149786f04e7d80838f8fa80e0cfc4b72658ef20 100644
--- a/core/modules/quickedit/src/EditorSelector.php
+++ b/core/modules/quickedit/src/EditorSelector.php
@@ -65,7 +65,7 @@ public function getEditor($formatter_type, FieldItemListInterface $items) {
     }
 
     // No early return, so create a list of all choices.
-    $editor_choices = array($editor_id);
+    $editor_choices = [$editor_id];
     if (isset($this->alternatives[$editor_id])) {
       $editor_choices = array_merge($editor_choices, $this->alternatives[$editor_id]);
     }
@@ -86,7 +86,7 @@ public function getEditor($formatter_type, FieldItemListInterface $items) {
    * {@inheritdoc}
    */
   public function getEditorAttachments(array $editor_ids) {
-    $attachments = array();
+    $attachments = [];
     $editor_ids = array_unique($editor_ids);
 
     // Editor plugins' attachments.
diff --git a/core/modules/quickedit/src/Form/QuickEditFieldForm.php b/core/modules/quickedit/src/Form/QuickEditFieldForm.php
index e64f3f2d1435ab31077326dedc60402df4a22bb1..ba2dac38eb1fa88e976ff943926ebb70d2907444 100644
--- a/core/modules/quickedit/src/Form/QuickEditFieldForm.php
+++ b/core/modules/quickedit/src/Form/QuickEditFieldForm.php
@@ -100,19 +100,19 @@ public function buildForm(array $form, FormStateInterface $form_state, EntityInt
 
     // Add a dummy changed timestamp field to attach form errors to.
     if ($entity instanceof EntityChangedInterface) {
-      $form['changed_field'] = array(
+      $form['changed_field'] = [
         '#type' => 'hidden',
         '#value' => $entity->getChangedTime(),
-      );
+      ];
     }
 
     // Add a submit button. Give it a class for easy JavaScript targeting.
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => t('Save'),
-      '#attributes' => array('class' => array('quickedit-form-submit')),
-    );
+      '#attributes' => ['class' => ['quickedit-form-submit']],
+    ];
 
     // Simplify it for optimal in-place use.
     $this->simplify($form, $form_state);
@@ -183,7 +183,7 @@ protected function buildEntity(array $form, FormStateInterface $form_state) {
     // @todo Refine automated log messages and abstract them to all entity
     //   types: https://www.drupal.org/node/1678002.
     if ($entity->getEntityTypeId() == 'node' && $entity->isNewRevision() && $entity->revision_log->isEmpty()) {
-      $entity->revision_log = t('Updated the %field-name field through in-place editing.', array('%field-name' => $entity->get($field_name)->getFieldDefinition()->getLabel()));
+      $entity->revision_log = t('Updated the %field-name field through in-place editing.', ['%field-name' => $entity->get($field_name)->getFieldDefinition()->getLabel()]);
     }
 
     return $entity;
diff --git a/core/modules/quickedit/src/MetadataGenerator.php b/core/modules/quickedit/src/MetadataGenerator.php
index 06f0dafe500f642c66e7c1352a69bc9d86674da0..f01256fcbbf6d638d2fb8ded4a522e459b8e2eb7 100644
--- a/core/modules/quickedit/src/MetadataGenerator.php
+++ b/core/modules/quickedit/src/MetadataGenerator.php
@@ -54,9 +54,9 @@ public function __construct(QuickEditEntityFieldAccessCheckInterface $access_che
    * {@inheritdoc}
    */
   public function generateEntityMetadata(EntityInterface $entity) {
-    return array(
+    return [
       'label' => $entity->label(),
-    );
+    ];
   }
 
   /**
@@ -69,24 +69,24 @@ public function generateFieldMetadata(FieldItemListInterface $items, $view_mode)
     // Early-return if user does not have access.
     $access = $this->accessChecker->accessEditEntityField($entity, $field_name);
     if (!$access) {
-      return array('access' => FALSE);
+      return ['access' => FALSE];
     }
 
     // Early-return if no editor is available.
     $formatter_id = EntityViewDisplay::collectRenderDisplay($entity, $view_mode)->getRenderer($field_name)->getPluginId();
     $editor_id = $this->editorSelector->getEditor($formatter_id, $items);
     if (!isset($editor_id)) {
-      return array('access' => FALSE);
+      return ['access' => FALSE];
     }
 
     // Gather metadata, allow the editor to add additional metadata of its own.
     $label = $items->getFieldDefinition()->getLabel();
     $editor = $this->editorManager->createInstance($editor_id);
-    $metadata = array(
+    $metadata = [
       'label' => $label,
       'access' => TRUE,
       'editor' => $editor_id,
-    );
+    ];
     $custom_metadata = $editor->getMetadata($items);
     if (count($custom_metadata)) {
       $metadata['custom'] = $custom_metadata;
diff --git a/core/modules/quickedit/src/Plugin/InPlaceEditor/FormEditor.php b/core/modules/quickedit/src/Plugin/InPlaceEditor/FormEditor.php
index 6a9907086e7d6f1e6e10a3d348674eb6bc21d0ee..83ab1b46364a00c54f88d68140e9134422ecbcaa 100644
--- a/core/modules/quickedit/src/Plugin/InPlaceEditor/FormEditor.php
+++ b/core/modules/quickedit/src/Plugin/InPlaceEditor/FormEditor.php
@@ -25,11 +25,11 @@ public function isCompatible(FieldItemListInterface $items) {
    * {@inheritdoc}
    */
   public function getAttachments() {
-    return array(
-      'library' => array(
+    return [
+      'library' => [
         'quickedit/quickedit.inPlaceEditor.form',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/quickedit/src/Plugin/InPlaceEditor/PlainTextEditor.php b/core/modules/quickedit/src/Plugin/InPlaceEditor/PlainTextEditor.php
index 1f61a5621cc5af22f22edae678ef85fe3e598a85..5217c20f4a13697f8e56237732f6388afb5abf74 100644
--- a/core/modules/quickedit/src/Plugin/InPlaceEditor/PlainTextEditor.php
+++ b/core/modules/quickedit/src/Plugin/InPlaceEditor/PlainTextEditor.php
@@ -28,11 +28,11 @@ public function isCompatible(FieldItemListInterface $items) {
    * {@inheritdoc}
    */
   public function getAttachments() {
-    return array(
-      'library' => array(
+    return [
+      'library' => [
         'quickedit/quickedit.inPlaceEditor.plainText',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/quickedit/src/Plugin/InPlaceEditorBase.php b/core/modules/quickedit/src/Plugin/InPlaceEditorBase.php
index d09c38e188ab0fadf33acaef5b197b367d7a0825..c7b54aa1a072605a6cf18ca10dd3795ec3d55a8c 100644
--- a/core/modules/quickedit/src/Plugin/InPlaceEditorBase.php
+++ b/core/modules/quickedit/src/Plugin/InPlaceEditorBase.php
@@ -19,7 +19,7 @@ abstract class InPlaceEditorBase extends PluginBase implements InPlaceEditorInte
    * {@inheritdoc}
    */
   function getMetadata(FieldItemListInterface $items) {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/quickedit/src/QuickEditController.php b/core/modules/quickedit/src/QuickEditController.php
index a42bcd09396a21426337e334a46ecaf7c0b82301..2b1e4b230a2a8a3646c3347f2b69d0ccbc347fbe 100644
--- a/core/modules/quickedit/src/QuickEditController.php
+++ b/core/modules/quickedit/src/QuickEditController.php
@@ -98,7 +98,7 @@ public function metadata(Request $request) {
     }
     $entities = $request->request->get('entities');
 
-    $metadata = array();
+    $metadata = [];
     foreach ($fields as $field) {
       list($entity_type, $entity_id, $field_name, $langcode, $view_mode) = explode('/', $field);
 
@@ -205,7 +205,7 @@ public function fieldForm(EntityInterface $entity, $field_name, $langcode, $view
 
       // Re-render the updated field for other view modes (i.e. for other
       // instances of the same logical field on the user's page).
-      $other_view_mode_ids = $request->request->get('other_view_modes') ?: array();
+      $other_view_mode_ids = $request->request->get('other_view_modes') ?: [];
       $other_view_modes = array_map($render_field_in_view_mode, array_combine($other_view_mode_ids, $other_view_mode_ids));
 
       $response->addCommand(new FieldFormSavedCommand($output, $other_view_modes));
@@ -220,9 +220,9 @@ public function fieldForm(EntityInterface $entity, $field_name, $langcode, $view
 
       $errors = $form_state->getErrors();
       if (count($errors)) {
-        $status_messages = array(
+        $status_messages = [
           '#type' => 'status_messages'
-        );
+        ];
         $response->addCommand(new FieldFormValidationErrorsCommand($this->renderer->renderRoot($status_messages)));
       }
     }
@@ -266,7 +266,7 @@ protected function renderField(EntityInterface $entity, $field_name, $langcode,
       // by a dash; the first part must be the module name.
       $mode_id_parts = explode('-', $view_mode_id, 2);
       $module = reset($mode_id_parts);
-      $args = array($entity, $field_name, $view_mode_id, $langcode);
+      $args = [$entity, $field_name, $view_mode_id, $langcode];
       $output = $this->moduleHandler()->invoke($module, 'quickedit_render_field', $args);
     }
 
@@ -291,10 +291,10 @@ public function entitySave(EntityInterface $entity) {
 
     // Return information about the entity that allows a front end application
     // to identify it.
-    $output = array(
+    $output = [
       'entity_type' => $entity->getEntityTypeId(),
       'entity_id' => $entity->id()
-    );
+    ];
 
     // Respond to client that the entity was saved properly.
     $response = new AjaxResponse();
diff --git a/core/modules/quickedit/src/Tests/QuickEditAutocompleteTermTest.php b/core/modules/quickedit/src/Tests/QuickEditAutocompleteTermTest.php
index 1eedb1c665cbb9a78bbf8988b3d511ac9e49ab86..a1ef6cd2e8bbf615839fdca2f532a4206e9abceb 100644
--- a/core/modules/quickedit/src/Tests/QuickEditAutocompleteTermTest.php
+++ b/core/modules/quickedit/src/Tests/QuickEditAutocompleteTermTest.php
@@ -25,7 +25,7 @@ class QuickEditAutocompleteTermTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'taxonomy', 'quickedit');
+  public static $modules = ['node', 'taxonomy', 'quickedit'];
 
   /**
    * Stores the node used for the tests.
@@ -72,9 +72,9 @@ class QuickEditAutocompleteTermTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'article',
-    ));
+    ]);
     // Create the vocabulary for the tag field.
     $this->vocabulary = Vocabulary::create([
       'name' => 'quickedit testing tags',
@@ -83,12 +83,12 @@ protected function setUp() {
     $this->vocabulary->save();
     $this->fieldName = 'field_' . $this->vocabulary->id();
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $this->fieldName, 'Tags', 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
@@ -114,7 +114,7 @@ protected function setUp() {
     $this->term1 = $this->createTerm();
     $this->term2 = $this->createTerm();
 
-    $node = array();
+    $node = [];
     $node['type'] = 'article';
     $node[$this->fieldName][]['target_id'] = $this->term1->id();
     $node[$this->fieldName][]['target_id'] = $this->term2->id();
@@ -130,7 +130,7 @@ public function testAutocompleteQuickEdit() {
     $this->drupalLogin($this->editorUser);
 
     $quickedit_uri = 'quickedit/form/node/' . $this->node->id() . '/' . $this->fieldName . '/' . $this->node->language()->getId() . '/full';
-    $post = array('nocssjs' => 'true') + $this->getAjaxPageStatePostData();
+    $post = ['nocssjs' => 'true'] + $this->getAjaxPageStatePostData();
     $response = $this->drupalPost($quickedit_uri, '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $ajax_commands = Json::decode($response);
 
@@ -140,13 +140,13 @@ public function testAutocompleteQuickEdit() {
     $this->assertTrue($form_tokens_found, 'Form tokens found in output.');
 
     if ($form_tokens_found) {
-      $post = array(
+      $post = [
         'form_id' => 'quickedit_field_form',
         'form_token' => $token_match[1],
         'form_build_id' => $build_id_match[1],
-        $this->fieldName . '[target_id]' => implode(', ', array($this->term1->getName(), 'new term', $this->term2->getName())),
+        $this->fieldName . '[target_id]' => implode(', ', [$this->term1->getName(), 'new term', $this->term2->getName()]),
         'op' => t('Save'),
-      );
+      ];
 
       // Submit field form and check response. Should render back all the terms.
       $response = $this->drupalPost($quickedit_uri, '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
@@ -161,7 +161,7 @@ public function testAutocompleteQuickEdit() {
       // Load the form again, which should now get it back from
       // PrivateTempStore.
       $quickedit_uri = 'quickedit/form/node/' . $this->node->id() . '/' . $this->fieldName . '/' . $this->node->language()->getId() . '/full';
-      $post = array('nocssjs' => 'true') + $this->getAjaxPageStatePostData();
+      $post = ['nocssjs' => 'true'] + $this->getAjaxPageStatePostData();
       $response = $this->drupalPost($quickedit_uri, '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
       $ajax_commands = Json::decode($response);
 
@@ -170,15 +170,15 @@ public function testAutocompleteQuickEdit() {
       // taxonomy terms, including the one that has just been newly created and
       // which is not yet stored.
       $this->setRawContent($ajax_commands[0]['data']);
-      $expected = array(
+      $expected = [
         $this->term1->getName() . ' (' . $this->term1->id() . ')',
         'new term',
         $this->term2->getName() . ' (' . $this->term2->id() . ')',
-      );
+      ];
       $this->assertFieldByName($this->fieldName . '[target_id]', implode(', ', $expected));
 
       // Save the entity.
-      $post = array('nocssjs' => 'true');
+      $post = ['nocssjs' => 'true'];
       $response = $this->drupalPostWithFormat('quickedit/entity/node/' . $this->node->id(), 'json', $post);
       $this->assertResponse(200);
 
diff --git a/core/modules/quickedit/src/Tests/QuickEditLoadingTest.php b/core/modules/quickedit/src/Tests/QuickEditLoadingTest.php
index 1570a27ad7d11d8ad00d2affef2929cc4eafa442..41f26a841fc02c49199f490cfb4406421a402cff 100644
--- a/core/modules/quickedit/src/Tests/QuickEditLoadingTest.php
+++ b/core/modules/quickedit/src/Tests/QuickEditLoadingTest.php
@@ -27,13 +27,13 @@ class QuickEditLoadingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'contextual',
     'quickedit',
     'filter',
     'node',
     'image',
-  );
+  ];
 
   /**
    * An user with permissions to create and edit articles.
@@ -53,19 +53,19 @@ protected function setUp() {
     parent::setUp();
 
     // Create a text format.
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $filtered_html_format->save();
 
     // Create a node type.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'article',
       'name' => 'Article',
-    ));
+    ]);
 
     // Set the node type to initially not have revisions.
     // Testing with revisions will be done later.
@@ -74,22 +74,22 @@ protected function setUp() {
     $node_type->save();
 
     // Create one node of the above node type using the above text format.
-    $this->drupalCreateNode(array(
+    $this->drupalCreateNode([
       'type' => 'article',
-      'body' => array(
-        0 => array(
+      'body' => [
+        0 => [
           'value' => '<p>How are you?</p>',
           'format' => 'filtered_html',
-        )
-      ),
+        ]
+      ],
       'revision_log' => $this->randomString(),
-    ));
+    ]);
 
     // Create 2 users, the only difference being the ability to use in-place
     // editing
-    $basic_permissions = array('access content', 'create article content', 'edit any article content', 'use text format filtered_html', 'access contextual links');
+    $basic_permissions = ['access content', 'create article content', 'edit any article content', 'use text format filtered_html', 'access contextual links'];
     $this->authorUser = $this->drupalCreateUser($basic_permissions);
-    $this->editorUser = $this->drupalCreateUser(array_merge($basic_permissions, array('access in-place editing')));
+    $this->editorUser = $this->drupalCreateUser(array_merge($basic_permissions, ['access in-place editing']));
   }
 
   /**
@@ -110,7 +110,7 @@ public function testUserWithoutPermission() {
     $this->assertNoFieldByXPath('//h1[contains(@class, "js-quickedit-page-title")]');
 
     // Retrieving the metadata should result in an empty 403 response.
-    $post = array('fields[0]' => 'node/1/body/en/full');
+    $post = ['fields[0]' => 'node/1/body/en/full'];
     $response = $this->drupalPostWithFormat(Url::fromRoute('quickedit.metadata'), 'json', $post);
     $this->assertIdentical(Json::encode(['message' => "The 'access in-place editing' permission is required."]), $response);
     $this->assertResponse(403);
@@ -118,16 +118,16 @@ public function testUserWithoutPermission() {
     // Quick Edit's JavaScript would never hit these endpoints if the metadata
     // was empty as above, but we need to make sure that malicious users aren't
     // able to use any of the other endpoints either.
-    $post = array('editors[0]' => 'form') + $this->getAjaxPageStatePostData();
+    $post = ['editors[0]' => 'form'] + $this->getAjaxPageStatePostData();
     $response = $this->drupalPost('quickedit/attachments', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $message = Json::encode(['message' => "The 'access in-place editing' permission is required."]);
     $this->assertIdentical($message, $response);
     $this->assertResponse(403);
-    $post = array('nocssjs' => 'true') + $this->getAjaxPageStatePostData();
+    $post = ['nocssjs' => 'true'] + $this->getAjaxPageStatePostData();
     $response = $this->drupalPost('quickedit/form/' . 'node/1/body/en/full', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $this->assertIdentical($message, $response);
     $this->assertResponse(403);
-    $edit = array();
+    $edit = [];
     $edit['form_id'] = 'quickedit_field_form';
     $edit['form_token'] = 'xIOzMjuc-PULKsRn_KxFn7xzNk5Bx7XKXLfQfw1qOnA';
     $edit['form_build_id'] = 'form-kVmovBpyX-SJfTT5kY0pjTV35TV-znor--a64dEnMR8';
@@ -138,7 +138,7 @@ public function testUserWithoutPermission() {
     $response = $this->drupalPost('quickedit/form/' . 'node/1/body/en/full', '', $edit, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $this->assertIdentical($message, $response);
     $this->assertResponse(403);
-    $post = array('nocssjs' => 'true');
+    $post = ['nocssjs' => 'true'];
     $response = $this->drupalPostWithFormat('quickedit/entity/' . 'node/1', 'json', $post);
     $this->assertIdentical(Json::encode(['message' => "The 'access in-place editing' permission is required."]), $response);
     $this->assertResponse(403);
@@ -173,16 +173,16 @@ public function testUserWithPermission() {
 
     // Retrieving the metadata should result in a 200 JSON response.
     $htmlPageDrupalSettings = $this->drupalSettings;
-    $post = array('fields[0]' => 'node/1/body/en/full');
+    $post = ['fields[0]' => 'node/1/body/en/full'];
     $response = $this->drupalPostWithFormat('quickedit/metadata', 'json', $post);
     $this->assertResponse(200);
-    $expected = array(
-      'node/1/body/en/full' => array(
+    $expected = [
+      'node/1/body/en/full' => [
         'label' => 'Body',
         'access' => TRUE,
         'editor' => 'form',
-      )
-    );
+      ]
+    ];
     $this->assertIdentical(Json::decode($response), $expected, 'The metadata HTTP request answers with the correct JSON response.');
     // Restore drupalSettings to build the next requests; simpletest wipes them
     // after a JSON response.
@@ -191,7 +191,7 @@ public function testUserWithPermission() {
     // Retrieving the attachments should result in a 200 response, containing:
     //  1. a settings command with useless metadata: AjaxController is dumb
     //  2. an insert command that loads the required in-place editors
-    $post = array('editors[0]' => 'form') + $this->getAjaxPageStatePostData();
+    $post = ['editors[0]' => 'form'] + $this->getAjaxPageStatePostData();
     $response = $this->drupalPost('quickedit/attachments', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $ajax_commands = Json::decode($response);
     $this->assertIdentical(2, count($ajax_commands), 'The attachments HTTP request results in two AJAX commands.');
@@ -203,7 +203,7 @@ public function testUserWithPermission() {
 
     // Retrieving the form for this field should result in a 200 response,
     // containing only a quickeditFieldForm command.
-    $post = array('nocssjs' => 'true', 'reset' => 'true') + $this->getAjaxPageStatePostData();
+    $post = ['nocssjs' => 'true', 'reset' => 'true'] + $this->getAjaxPageStatePostData();
     $response = $this->drupalPost('quickedit/form/' . 'node/1/body/en/full', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $this->assertResponse(200);
     $ajax_commands = Json::decode($response);
@@ -217,17 +217,17 @@ public function testUserWithPermission() {
     $this->assertTrue($form_tokens_found, 'Form tokens found in output.');
 
     if ($form_tokens_found) {
-      $edit = array(
+      $edit = [
         'body[0][summary]' => '',
         'body[0][value]' => '<p>Fine thanks.</p>',
         'body[0][format]' => 'filtered_html',
         'op' => t('Save'),
-      );
-      $post = array(
+      ];
+      $post = [
         'form_id' => 'quickedit_field_form',
         'form_token' => $token_match[1],
         'form_build_id' => $build_id_match[1],
-      );
+      ];
       $post += $edit + $this->getAjaxPageStatePostData();
 
       // Submit field form and check response. This should store the updated
@@ -238,14 +238,14 @@ public function testUserWithPermission() {
       $this->assertIdentical(1, count($ajax_commands), 'The field form HTTP request results in one AJAX command.');
       $this->assertIdentical('quickeditFieldFormSaved', $ajax_commands[0]['command'], 'The first AJAX command is a quickeditFieldFormSaved command.');
       $this->assertTrue(strpos($ajax_commands[0]['data'], 'Fine thanks.'), 'Form value saved and printed back.');
-      $this->assertIdentical($ajax_commands[0]['other_view_modes'], array(), 'Field was not rendered in any other view mode.');
+      $this->assertIdentical($ajax_commands[0]['other_view_modes'], [], 'Field was not rendered in any other view mode.');
 
       // Ensure the text on the original node did not change yet.
       $this->drupalGet('node/1');
       $this->assertText('How are you?');
 
       // Save the entity by moving the PrivateTempStore values to entity storage.
-      $post = array('nocssjs' => 'true');
+      $post = ['nocssjs' => 'true'];
       $response = $this->drupalPostWithFormat('quickedit/entity/' . 'node/1', 'json', $post);
       $this->assertResponse(200);
       $ajax_commands = Json::decode($response);
@@ -273,7 +273,7 @@ public function testUserWithPermission() {
       $node_type->save();
 
       // Retrieve field form.
-      $post = array('nocssjs' => 'true', 'reset' => 'true');
+      $post = ['nocssjs' => 'true', 'reset' => 'true'];
       $response = $this->drupalPost('quickedit/form/' . 'node/1/body/en/full', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
       $this->assertResponse(200);
       $ajax_commands = Json::decode($response);
@@ -285,11 +285,11 @@ public function testUserWithPermission() {
       preg_match('/\sname="form_token" value="([^"]+)"/', $ajax_commands[0]['data'], $token_match);
       preg_match('/\sname="form_build_id" value="([^"]+)"/', $ajax_commands[0]['data'], $build_id_match);
       $edit['body[0][value]'] = '<p>kthxbye</p>';
-      $post = array(
+      $post = [
         'form_id' => 'quickedit_field_form',
         'form_token' => $token_match[1],
         'form_build_id' => $build_id_match[1],
-      );
+      ];
       $post += $edit + $this->getAjaxPageStatePostData();
       $response = $this->drupalPost('quickedit/form/' . 'node/1/body/en/full', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
       $this->assertResponse(200);
@@ -299,7 +299,7 @@ public function testUserWithPermission() {
       $this->assertTrue(strpos($ajax_commands[0]['data'], 'kthxbye'), 'Form value saved and printed back.');
 
       // Save the entity.
-      $post = array('nocssjs' => 'true');
+      $post = ['nocssjs' => 'true'];
       $response = $this->drupalPostWithFormat('quickedit/entity/' . 'node/1', 'json', $post);
       $this->assertResponse(200);
       $ajax_commands = Json::decode($response);
@@ -326,21 +326,21 @@ public function testTitleBaseField() {
 
     // Ensure that the full page title is actually in-place editable
     $node = Node::load(1);
-    $elements = $this->xpath('//h1/span[@data-quickedit-field-id="node/1/title/en/full" and normalize-space(text())=:title]', array(':title' => $node->label()));
+    $elements = $this->xpath('//h1/span[@data-quickedit-field-id="node/1/title/en/full" and normalize-space(text())=:title]', [':title' => $node->label()]);
     $this->assertTrue(!empty($elements), 'Title with data-quickedit-field-id attribute found.');
 
     // Retrieving the metadata should result in a 200 JSON response.
     $htmlPageDrupalSettings = $this->drupalSettings;
-    $post = array('fields[0]' => 'node/1/title/en/full');
+    $post = ['fields[0]' => 'node/1/title/en/full'];
     $response = $this->drupalPostWithFormat('quickedit/metadata', 'json', $post);
     $this->assertResponse(200);
-    $expected = array(
-      'node/1/title/en/full' => array(
+    $expected = [
+      'node/1/title/en/full' => [
         'label' => 'Title',
         'access' => TRUE,
         'editor' => 'plain_text',
-      )
-    );
+      ]
+    ];
     $this->assertIdentical(Json::decode($response), $expected, 'The metadata HTTP request answers with the correct JSON response.');
     // Restore drupalSettings to build the next requests; simpletest wipes them
     // after a JSON response.
@@ -348,7 +348,7 @@ public function testTitleBaseField() {
 
     // Retrieving the form for this field should result in a 200 response,
     // containing only a quickeditFieldForm command.
-    $post = array('nocssjs' => 'true', 'reset' => 'true') + $this->getAjaxPageStatePostData();
+    $post = ['nocssjs' => 'true', 'reset' => 'true'] + $this->getAjaxPageStatePostData();
     $response = $this->drupalPost('quickedit/form/' . 'node/1/title/en/full', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $this->assertResponse(200);
     $ajax_commands = Json::decode($response);
@@ -363,15 +363,15 @@ public function testTitleBaseField() {
     $this->assertTrue($form_tokens_found, 'Form tokens found in output.');
 
     if ($form_tokens_found) {
-      $edit = array(
+      $edit = [
         'title[0][value]' => 'Obligatory question',
         'op' => t('Save'),
-      );
-      $post = array(
+      ];
+      $post = [
         'form_id' => 'quickedit_field_form',
         'form_token' => $token_match[1],
         'form_build_id' => $build_id_match[1],
-      );
+      ];
       $post += $edit + $this->getAjaxPageStatePostData();
 
       // Submit field form and check response. This should store the
@@ -388,7 +388,7 @@ public function testTitleBaseField() {
       $this->assertNoText('Obligatory question');
 
       // Save the entity by moving the PrivateTempStore values to entity storage.
-      $post = array('nocssjs' => 'true');
+      $post = ['nocssjs' => 'true'];
       $response = $this->drupalPostWithFormat('quickedit/entity/' . 'node/1', 'json', $post);
       $this->assertResponse(200);
       $ajax_commands = Json::decode($response);
@@ -409,9 +409,9 @@ public function testTitleBaseField() {
    */
   public function testDisplayOptions() {
     $node = Node::load('1');
-    $display_settings = array(
+    $display_settings = [
       'label' => 'inline',
-    );
+    ];
     $build = $node->body->view($display_settings);
     $output = \Drupal::service('renderer')->renderRoot($build);
     $this->assertFalse(strpos($output, 'data-quickedit-field-id'), 'data-quickedit-field-id attribute not added when rendering field using dynamic display options.');
@@ -421,13 +421,13 @@ public function testDisplayOptions() {
    * Tests that Quick Edit works with custom render pipelines.
    */
   public function testCustomPipeline() {
-    \Drupal::service('module_installer')->install(array('quickedit_test'));
+    \Drupal::service('module_installer')->install(['quickedit_test']);
 
     $custom_render_url = 'quickedit/form/node/1/body/en/quickedit_test-custom-render-data';
     $this->drupalLogin($this->editorUser);
 
     // Request editing to render results with the custom render pipeline.
-    $post = array('nocssjs' => 'true') + $this->getAjaxPageStatePostData();
+    $post = ['nocssjs' => 'true'] + $this->getAjaxPageStatePostData();
     $response = $this->drupalPost($custom_render_url, '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $ajax_commands = Json::decode($response);
 
@@ -437,7 +437,7 @@ public function testCustomPipeline() {
     $this->assertTrue($form_tokens_found, 'Form tokens found in output.');
 
     if ($form_tokens_found) {
-      $post = array(
+      $post = [
         'form_id' => 'quickedit_field_form',
         'form_token' => $token_match[1],
         'form_build_id' => $build_id_match[1],
@@ -445,10 +445,10 @@ public function testCustomPipeline() {
         'body[0][value]' => '<p>Fine thanks.</p>',
         'body[0][format]' => 'filtered_html',
         'op' => t('Save'),
-      );
+      ];
       // Assume there is another field on this page, which doesn't use a custom
       // render pipeline, but the default one, and it uses the "full" view mode.
-      $post += array('other_view_modes[]' => 'full');
+      $post += ['other_view_modes[]' => 'full'];
 
       // Submit field form and check response. Should render with the custom
       // render pipeline.
@@ -459,7 +459,7 @@ public function testCustomPipeline() {
       $this->assertIdentical('quickeditFieldFormSaved', $ajax_commands[0]['command'], 'The first AJAX command is a quickeditFieldFormSaved command.');
       $this->assertTrue(strpos($ajax_commands[0]['data'], 'Fine thanks.'), 'Form value saved and printed back.');
       $this->assertTrue(strpos($ajax_commands[0]['data'], '<div class="quickedit-test-wrapper">') !== FALSE, 'Custom render pipeline used to render the value.');
-      $this->assertIdentical(array_keys($ajax_commands[0]['other_view_modes']), array('full'), 'Field was also rendered in the "full" view mode.');
+      $this->assertIdentical(array_keys($ajax_commands[0]['other_view_modes']), ['full'], 'Field was also rendered in the "full" view mode.');
       $this->assertTrue(strpos($ajax_commands[0]['other_view_modes']['full'], 'Fine thanks.'), '"full" version of field contains the form value.');
     }
   }
@@ -471,7 +471,7 @@ public function testCustomPipeline() {
   public function testConcurrentEdit() {
     $this->drupalLogin($this->editorUser);
 
-    $post = array('nocssjs' => 'true') + $this->getAjaxPageStatePostData();
+    $post = ['nocssjs' => 'true'] + $this->getAjaxPageStatePostData();
     $response = $this->drupalPost('quickedit/form/' . 'node/1/body/en/full', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $this->assertResponse(200);
     $ajax_commands = Json::decode($response);
@@ -482,7 +482,7 @@ public function testConcurrentEdit() {
     $this->assertTrue($form_tokens_found, 'Form tokens found in output.');
 
     if ($form_tokens_found) {
-      $post = array(
+      $post = [
         'nocssjs' => 'true',
         'form_id' => 'quickedit_field_form',
         'form_token' => $token_match[1],
@@ -491,10 +491,10 @@ public function testConcurrentEdit() {
         'body[0][value]' => '<p>Fine thanks.</p>',
         'body[0][format]' => 'filtered_html',
         'op' => t('Save'),
-      );
+      ];
 
       // Save the node on the regular node edit form.
-      $this->drupalPostForm('node/1/edit', array(), t('Save'));
+      $this->drupalPostForm('node/1/edit', [], t('Save'));
       // Ensure different save timestamps for field editing.
       sleep(2);
 
@@ -513,7 +513,7 @@ public function testConcurrentEdit() {
    * Tests that Quick Edit's data- attributes are present for content blocks.
    */
   public function testContentBlock() {
-    \Drupal::service('module_installer')->install(array('block_content'));
+    \Drupal::service('module_installer')->install(['block_content']);
 
     // Create and place a content_block block.
     $block = BlockContent::create([
diff --git a/core/modules/quickedit/tests/modules/quickedit_test.module b/core/modules/quickedit/tests/modules/quickedit_test.module
index 3d2106d31ea3055f458de6333b28a09a64c0104a..b6199a6e8c9aabe2723b8ec98090c0f9e2fba43e 100644
--- a/core/modules/quickedit/tests/modules/quickedit_test.module
+++ b/core/modules/quickedit/tests/modules/quickedit_test.module
@@ -12,11 +12,11 @@
  */
 function quickedit_test_quickedit_render_field(EntityInterface $entity, $field_name, $view_mode_id, $langcode) {
   $entity = \Drupal::entityManager()->getTranslationFromContext($entity, $langcode);
-  return array(
+  return [
     '#prefix' => '<div class="quickedit-test-wrapper">',
     'field' => $entity->get($field_name)->view($view_mode_id),
     '#suffix' => '</div>',
-  );
+  ];
 }
 
 /**
diff --git a/core/modules/quickedit/tests/modules/src/Plugin/InPlaceEditor/WysiwygEditor.php b/core/modules/quickedit/tests/modules/src/Plugin/InPlaceEditor/WysiwygEditor.php
index 596df75a5c2914369cb67de89368d57103576768..c26bf909decf19961f9d62f4b1d0b72f53980b04 100644
--- a/core/modules/quickedit/tests/modules/src/Plugin/InPlaceEditor/WysiwygEditor.php
+++ b/core/modules/quickedit/tests/modules/src/Plugin/InPlaceEditor/WysiwygEditor.php
@@ -42,11 +42,11 @@ public function getMetadata(FieldItemListInterface $items) {
    * {@inheritdoc}
    */
   public function getAttachments() {
-    return array(
-      'library' => array(
+    return [
+      'library' => [
         'quickedit_test/not-existing-wysiwyg',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/quickedit/tests/src/Kernel/EditorSelectionTest.php b/core/modules/quickedit/tests/src/Kernel/EditorSelectionTest.php
index 0b3820cedf38fcd08546f299648fe99cf681c7f1..08a8fe04add941b59248eda940138fb1e27a6c2f 100644
--- a/core/modules/quickedit/tests/src/Kernel/EditorSelectionTest.php
+++ b/core/modules/quickedit/tests/src/Kernel/EditorSelectionTest.php
@@ -53,13 +53,13 @@ public function testText() {
     $this->createFieldWithStorage(
       $field_name, 'string', 1, 'Simple text field',
       // Instance settings.
-      array(),
+      [],
       // Widget type & settings.
       'string_textfield',
-      array('size' => 42),
+      ['size' => 42],
       // 'default' formatter type & settings.
       'string',
-      array()
+      []
     );
 
     // Create an entity with values for this text field.
@@ -84,7 +84,7 @@ public function testText() {
    */
   public function testTextWysiwyg() {
     // Enable edit_test module so that the 'wysiwyg' editor becomes available.
-    $this->enableModules(array('quickedit_test'));
+    $this->enableModules(['quickedit_test']);
     $this->editorManager = $this->container->get('plugin.manager.quickedit.editor');
     $this->editorSelector = new EditorSelector($this->editorManager, $this->container->get('plugin.manager.field.formatter'));
 
@@ -92,13 +92,13 @@ public function testTextWysiwyg() {
     $this->createFieldWithStorage(
       $field_name, 'text', 1, 'Long text field',
       // Instance settings.
-      array(),
+      [],
       // Widget type & settings.
       'text_textarea',
-      array('size' => 42),
+      ['size' => 42],
       // 'default' formatter type & settings.
       'text_default',
-      array()
+      []
     );
 
     // Create an entity with values for this text field.
@@ -129,13 +129,13 @@ public function testNumber() {
     $this->createFieldWithStorage(
       $field_name, 'integer', 1, 'Simple number field',
       // Instance settings.
-      array(),
+      [],
       // Widget type & settings.
       'number',
-      array(),
+      [],
       // 'default' formatter type & settings.
       'number_integer',
-      array()
+      []
     );
 
     // Create an entity with values for this text field.
diff --git a/core/modules/quickedit/tests/src/Kernel/MetadataGeneratorTest.php b/core/modules/quickedit/tests/src/Kernel/MetadataGeneratorTest.php
index 28480f4b64f174a9557530121999494b1c451e44..9a453fb7ab5af48fbff99891c8d4442260db3617 100644
--- a/core/modules/quickedit/tests/src/Kernel/MetadataGeneratorTest.php
+++ b/core/modules/quickedit/tests/src/Kernel/MetadataGeneratorTest.php
@@ -18,7 +18,7 @@ class MetadataGeneratorTest extends QuickEditTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('quickedit_test');
+  public static $modules = ['quickedit_test'];
 
   /**
    * The manager for editor plugins.
@@ -66,26 +66,26 @@ public function testSimpleEntityType() {
     $this->createFieldWithStorage(
       $field_1_name, 'string', 1, $field_1_label,
       // Instance settings.
-      array(),
+      [],
       // Widget type & settings.
       'string_textfield',
-      array('size' => 42),
+      ['size' => 42],
       // 'default' formatter type & settings.
       'string',
-      array()
+      []
     );
     $field_2_name = 'field_nr';
     $field_2_label = 'Simple number field';
     $this->createFieldWithStorage(
       $field_2_name, 'integer', 1, $field_2_label,
       // Instance settings.
-      array(),
+      [],
       // Widget type & settings.
       'number',
-      array(),
+      [],
       // 'default' formatter type & settings.
       'number_integer',
-      array()
+      []
     );
 
     // Create an entity with values for this text field.
@@ -98,21 +98,21 @@ public function testSimpleEntityType() {
     // Verify metadata for field 1.
     $items_1 = $entity->get($field_1_name);
     $metadata_1 = $this->metadataGenerator->generateFieldMetadata($items_1, 'default');
-    $expected_1 = array(
+    $expected_1 = [
       'access' => TRUE,
       'label' => 'Plain text field',
       'editor' => 'plain_text',
-    );
+    ];
     $this->assertEqual($expected_1, $metadata_1, 'The correct metadata is generated for the first field.');
 
     // Verify metadata for field 2.
     $items_2 = $entity->get($field_2_name);
     $metadata_2 = $this->metadataGenerator->generateFieldMetadata($items_2, 'default');
-    $expected_2 = array(
+    $expected_2 = [
       'access' => TRUE,
       'label' => 'Simple number field',
       'editor' => 'form',
-    );
+    ];
     $this->assertEqual($expected_2, $metadata_2, 'The correct metadata is generated for the second field.');
   }
 
@@ -134,24 +134,24 @@ public function testEditorWithCustomMetadata() {
     $this->createFieldWithStorage(
       $field_name, 'text', 1, $field_label,
       // Instance settings.
-      array(),
+      [],
       // Widget type & settings.
       'text_textfield',
-      array('size' => 42),
+      ['size' => 42],
       // 'default' formatter type & settings.
       'text_default',
-      array()
+      []
     );
 
     // Create a text format.
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
       'weight' => 1,
-      'filters' => array(
-        'filter_htmlcorrector' => array('status' => 1),
-      ),
-    ));
+      'filters' => [
+        'filter_htmlcorrector' => ['status' => 1],
+      ],
+    ]);
     $full_html_format->save();
 
     // Create an entity with values for this rich text field.
@@ -164,14 +164,14 @@ public function testEditorWithCustomMetadata() {
     // Verify metadata.
     $items = $entity->get($field_name);
     $metadata = $this->metadataGenerator->generateFieldMetadata($items, 'default');
-    $expected = array(
+    $expected = [
       'access' => TRUE,
       'label' => 'Rich text field',
       'editor' => 'wysiwyg',
-      'custom' => array(
+      'custom' => [
         'format' => 'full_html'
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($expected, $metadata); //, 'The correct metadata (including custom metadata) is generated.');
   }
 
diff --git a/core/modules/quickedit/tests/src/Kernel/QuickEditTestBase.php b/core/modules/quickedit/tests/src/Kernel/QuickEditTestBase.php
index bfdb229f68e3305fe9b1bfa5099b8fb1d616eb8e..29437485878e419bb43105828f1bd70d63cadf2a 100644
--- a/core/modules/quickedit/tests/src/Kernel/QuickEditTestBase.php
+++ b/core/modules/quickedit/tests/src/Kernel/QuickEditTestBase.php
@@ -37,11 +37,11 @@ abstract class QuickEditTestBase extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->fields = new \ArrayObject(array(), \ArrayObject::ARRAY_AS_PROPS);
+    $this->fields = new \ArrayObject([], \ArrayObject::ARRAY_AS_PROPS);
 
     $this->installEntitySchema('user');
     $this->installEntitySchema('entity_test');
-    $this->installConfig(array('field', 'filter'));
+    $this->installConfig(['field', 'filter']);
   }
 
   /**
@@ -67,12 +67,12 @@ protected function setUp() {
    */
   protected function createFieldWithStorage($field_name, $type, $cardinality, $label, $field_settings, $widget_type, $widget_settings, $formatter_type, $formatter_settings) {
     $field_storage = $field_name . '_field_storage';
-    $this->fields->$field_storage = FieldStorageConfig::create(array(
+    $this->fields->$field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => $type,
       'cardinality' => $cardinality,
-    ));
+    ]);
     $this->fields->$field_storage->save();
 
     $field = $field_name . '_field';
@@ -87,18 +87,18 @@ protected function createFieldWithStorage($field_name, $type, $cardinality, $lab
     $this->fields->$field->save();
 
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => $widget_type,
         'settings' => $widget_settings,
-      ))
+      ])
       ->save();
 
     entity_get_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'label' => 'above',
         'type' => $formatter_type,
         'settings' => $formatter_settings
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/quickedit/tests/src/Unit/Access/QuickEditEntityFieldAccessCheckTest.php b/core/modules/quickedit/tests/src/Unit/Access/QuickEditEntityFieldAccessCheckTest.php
index 9f350576d99c76b8aeff5713c78122a2a3ccba55..0827436982f6f0b16f3a1bd93dbad139ac6caf1e 100644
--- a/core/modules/quickedit/tests/src/Unit/Access/QuickEditEntityFieldAccessCheckTest.php
+++ b/core/modules/quickedit/tests/src/Unit/Access/QuickEditEntityFieldAccessCheckTest.php
@@ -43,11 +43,11 @@ protected function setUp() {
    * @see \Drupal\Tests\edit\Unit\quickedit\Access\QuickEditEntityFieldAccessCheckTest::testAccess()
    */
   public function providerTestAccess() {
-    $data = array();
-    $data[] = array(TRUE, TRUE, AccessResult::allowed());
-    $data[] = array(FALSE, TRUE, AccessResult::neutral());
-    $data[] = array(TRUE, FALSE, AccessResult::neutral());
-    $data[] = array(FALSE, FALSE, AccessResult::neutral());
+    $data = [];
+    $data[] = [TRUE, TRUE, AccessResult::allowed()];
+    $data[] = [FALSE, TRUE, AccessResult::neutral()];
+    $data[] = [TRUE, FALSE, AccessResult::neutral()];
+    $data[] = [FALSE, FALSE, AccessResult::neutral()];
 
     return $data;
   }
@@ -108,15 +108,15 @@ public function testAccessForbidden($field_name, $langcode) {
    * Provides test data for testAccessForbidden.
    */
   public function providerTestAccessForbidden() {
-    $data = array();
+    $data = [];
     // Tests the access method without a field_name.
-    $data[] = array(NULL, LanguageInterface::LANGCODE_NOT_SPECIFIED);
+    $data[] = [NULL, LanguageInterface::LANGCODE_NOT_SPECIFIED];
     // Tests the access method with a non-existent field.
-    $data[] = array('not_valid', LanguageInterface::LANGCODE_NOT_SPECIFIED);
+    $data[] = ['not_valid', LanguageInterface::LANGCODE_NOT_SPECIFIED];
     // Tests the access method without a langcode.
-    $data[] = array('valid', NULL);
+    $data[] = ['valid', NULL];
     // Tests the access method with an invalid langcode.
-    $data[] = array('valid', 'xx-lolspeak');
+    $data[] = ['valid', 'xx-lolspeak'];
     return $data;
   }
 
@@ -132,16 +132,16 @@ protected function createMockEntity() {
 
     $entity->expects($this->any())
       ->method('hasTranslation')
-      ->will($this->returnValueMap(array(
-        array(LanguageInterface::LANGCODE_NOT_SPECIFIED, TRUE),
-        array('xx-lolspeak', FALSE),
-      )));
+      ->will($this->returnValueMap([
+        [LanguageInterface::LANGCODE_NOT_SPECIFIED, TRUE],
+        ['xx-lolspeak', FALSE],
+      ]));
     $entity->expects($this->any())
       ->method('hasField')
-      ->will($this->returnValueMap(array(
-        array('valid', TRUE),
-        array('not_valid', FALSE),
-      )));
+      ->will($this->returnValueMap([
+        ['valid', TRUE],
+        ['not_valid', FALSE],
+      ]));
 
     return $entity;
   }
diff --git a/core/modules/rdf/rdf.api.php b/core/modules/rdf/rdf.api.php
index 3dbe7d1e2677653b0a0db146762748148e571f32..dd7ae222721683be51711d132d10bd6be5748660 100644
--- a/core/modules/rdf/rdf.api.php
+++ b/core/modules/rdf/rdf.api.php
@@ -25,7 +25,7 @@
  * @ingroup rdf
  */
 function hook_rdf_namespaces() {
-  return array(
+  return [
     'content'  => 'http://purl.org/rss/1.0/modules/content/',
     'dc'       => 'http://purl.org/dc/terms/',
     'foaf'     => 'http://xmlns.com/foaf/0.1/',
@@ -35,7 +35,7 @@ function hook_rdf_namespaces() {
     'sioct'    => 'http://rdfs.org/sioc/types#',
     'skos'     => 'http://www.w3.org/2004/02/skos/core#',
     'xsd'      => 'http://www.w3.org/2001/XMLSchema#',
-  );
+  ];
 }
 
 /**
diff --git a/core/modules/rdf/rdf.module b/core/modules/rdf/rdf.module
index 3108ee12745f4e9f08a34ca37ecb0e5d14364dfb..0afcb09186c31ca6a6edb296682225b83cf4e4c2 100644
--- a/core/modules/rdf/rdf.module
+++ b/core/modules/rdf/rdf.module
@@ -17,7 +17,7 @@ function rdf_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.rdf':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The RDF module enriches your content with metadata to let other applications (e.g., search engines, aggregators, and so on) better understand its relationships and attributes. This semantically enriched, machine-readable output for your website uses the <a href=":rdfa">RDFa specification</a>, which allows RDF data to be embedded in HTML markup. Other modules can define mappings of their data to RDF terms, and the RDF module makes this RDF data available to the theme. The core modules define RDF mappings for their data model, and the core themes output this RDF metadata information along with the human-readable visual information. For more information, see the <a href=":rdf">online documentation for the RDF module</a>.', array(':rdfa' => 'http://www.w3.org/TR/xhtml-rdfa-primer/', ':rdf' => 'https://www.drupal.org/documentation/modules/rdf')) . '</p>';
+      $output .= '<p>' . t('The RDF module enriches your content with metadata to let other applications (e.g., search engines, aggregators, and so on) better understand its relationships and attributes. This semantically enriched, machine-readable output for your website uses the <a href=":rdfa">RDFa specification</a>, which allows RDF data to be embedded in HTML markup. Other modules can define mappings of their data to RDF terms, and the RDF module makes this RDF data available to the theme. The core modules define RDF mappings for their data model, and the core themes output this RDF metadata information along with the human-readable visual information. For more information, see the <a href=":rdf">online documentation for the RDF module</a>.', [':rdfa' => 'http://www.w3.org/TR/xhtml-rdfa-primer/', ':rdf' => 'https://www.drupal.org/documentation/modules/rdf']) . '</p>';
       return $output;
   }
 }
@@ -74,10 +74,10 @@ function rdf_get_mapping($entity_type, $bundle) {
 
   // If not found, create a fresh mapping object.
   if (!$mapping) {
-    $mapping = RdfMapping::create(array(
+    $mapping = RdfMapping::create([
       'targetEntityType' => $entity_type,
       'bundle' => $bundle,
-    ));
+    ]);
   }
 
   return $mapping;
@@ -87,7 +87,7 @@ function rdf_get_mapping($entity_type, $bundle) {
  * Implements hook_rdf_namespaces().
  */
 function rdf_rdf_namespaces() {
-  return array(
+  return [
     'content'  => 'http://purl.org/rss/1.0/modules/content/',
     'dc'       => 'http://purl.org/dc/terms/',
     'foaf'     => 'http://xmlns.com/foaf/0.1/',
@@ -98,7 +98,7 @@ function rdf_rdf_namespaces() {
     'sioct'    => 'http://rdfs.org/sioc/types#',
     'skos'     => 'http://www.w3.org/2004/02/skos/core#',
     'xsd'      => 'http://www.w3.org/2001/XMLSchema#',
-  );
+  ];
 }
 
 /**
@@ -108,14 +108,14 @@ function rdf_rdf_namespaces() {
  * implement it.
  */
 function rdf_get_namespaces() {
-  $namespaces = array();
+  $namespaces = [];
   // In order to resolve duplicate namespaces by using the earliest defined
   // namespace, do not use \Drupal::moduleHandler()->invokeAll().
   foreach (\Drupal::moduleHandler()->getImplementations('rdf_namespaces') as $module) {
     $function = $module . '_rdf_namespaces';
     foreach ($function() as $prefix => $namespace) {
       if (array_key_exists($prefix, $namespaces) && $namespace !== $namespaces[$prefix]) {
-        throw new Exception(t('Tried to map @prefix to @namespace, but @prefix is already mapped to @orig_namespace.', array('@prefix' => $prefix, '@namespace' => $namespace, '@orig_namespace' => $namespaces[$prefix])));
+        throw new Exception(t('Tried to map @prefix to @namespace, but @prefix is already mapped to @orig_namespace.', ['@prefix' => $prefix, '@namespace' => $namespace, '@orig_namespace' => $namespaces[$prefix]]));
       }
       else {
         $namespaces[$prefix] = $namespace;
@@ -165,7 +165,7 @@ function rdf_get_namespaces() {
  *   RDFa attributes suitable for Drupal\Core\Template\Attribute.
  */
 function rdf_rdfa_attributes($mapping, $data = NULL) {
-  $attributes = array();
+  $attributes = [];
 
   // The type of mapping defaults to 'property'.
   $type = isset($mapping['mapping_type']) ? $mapping['mapping_type'] : 'property';
@@ -249,14 +249,14 @@ function rdf_comment_storage_load($comments) {
  * Implements hook_theme().
  */
 function rdf_theme() {
-  return array(
-    'rdf_wrapper' => array(
-      'variables' => array('attributes' => array(), 'content' => NULL),
-    ),
-    'rdf_metadata' => array(
-      'variables' => array('metadata' => array()),
-    ),
-  );
+  return [
+    'rdf_wrapper' => [
+      'variables' => ['attributes' => [], 'content' => NULL],
+    ],
+    'rdf_metadata' => [
+      'variables' => ['metadata' => []],
+    ],
+  ];
 }
 
 /**
@@ -266,7 +266,7 @@ function rdf_preprocess_html(&$variables) {
   // Adds RDF namespace prefix bindings in the form of an RDFa 1.1 prefix
   // attribute inside the html element.
   if (!isset($variables['html_attributes']['prefix'])) {
-    $variables['html_attributes']['prefix'] = array();
+    $variables['html_attributes']['prefix'] = [];
   }
   foreach (rdf_get_namespaces() as $prefix => $uri) {
     $variables['html_attributes']['prefix'][] = $prefix . ': ' . $uri . " ";
@@ -315,20 +315,20 @@ function rdf_preprocess_node(&$variables) {
   if ($title_mapping) {
     $title_attributes['property'] = empty($title_mapping['properties']) ? NULL : $title_mapping['properties'];
     $title_attributes['content'] = $variables['node']->label();
-    $variables['title_suffix']['rdf_meta_title'] = array(
+    $variables['title_suffix']['rdf_meta_title'] = [
       '#theme' => 'rdf_metadata',
-      '#metadata' => array($title_attributes),
-    );
+      '#metadata' => [$title_attributes],
+    ];
   }
 
   // Adds RDFa markup for the date.
   $created_mapping = $mapping->getPreparedFieldMapping('created');
   if (!empty($created_mapping) && $variables['display_submitted']) {
     $date_attributes = rdf_rdfa_attributes($created_mapping, $variables['node']->get('created')->first()->toArray());
-    $rdf_metadata = array(
+    $rdf_metadata = [
       '#theme' => 'rdf_metadata',
-      '#metadata' => array($date_attributes),
-    );
+      '#metadata' => [$date_attributes],
+    ];
     $variables['metadata'] = drupal_render($rdf_metadata);
   }
 
@@ -345,10 +345,10 @@ function rdf_preprocess_node(&$variables) {
         // Adds RDFa markup for the comment count near the node title as
         // metadata.
         $comment_count_attributes = rdf_rdfa_attributes($comment_count_mapping, $variables['node']->get($field_name)->comment_count);
-        $variables['title_suffix']['rdf_meta_comment_count'] = array(
+        $variables['title_suffix']['rdf_meta_comment_count'] = [
           '#theme' => 'rdf_metadata',
-          '#metadata' => array($comment_count_attributes),
-        );
+          '#metadata' => [$comment_count_attributes],
+        ];
       }
     }
   }
@@ -377,15 +377,15 @@ function rdf_preprocess_user(&$variables) {
     // rdf_preprocess_username().
     $name_mapping = $mapping->getPreparedFieldMapping('name');
     if (!empty($name_mapping['properties'])) {
-      $username_meta = array(
+      $username_meta = [
         '#tag' => 'meta',
-        '#attributes' => array(
+        '#attributes' => [
           'about' => $account->url(),
           'property' => $name_mapping['properties'],
           'content' => $account->getDisplayName(),
           'lang' => '',
-        ),
-      );
+        ],
+      ];
       $variables['#attached']['html_head'][] = [$username_meta, 'rdf_user_username'];
     }
   }
@@ -482,10 +482,10 @@ function rdf_preprocess_comment(&$variables) {
     // cached as part of the entity.
     $date_attributes = $comment->rdf_data['date'];
 
-    $rdf_metadata = array(
+    $rdf_metadata = [
       '#theme' => 'rdf_metadata',
-      '#metadata' => array($date_attributes),
-    );
+      '#metadata' => [$date_attributes],
+    ];
     // Ensure the original variable is represented as a render array.
     $created = !is_array($variables['created']) ? ['#markup' => $variables['created']] : $variables['created'];
     $submitted = !is_array($variables['submitted']) ? ['#markup' => $variables['submitted']] : $variables['submitted'];
@@ -527,10 +527,10 @@ function rdf_preprocess_comment(&$variables) {
   }
   // Adds RDF metadata markup above comment body if any.
   if (!empty($variables['rdf_metadata_attributes']) && isset($variables['content']['comment_body'])) {
-    $rdf_metadata = array(
+    $rdf_metadata = [
       '#theme' => 'rdf_metadata',
       '#metadata' => $variables['rdf_metadata_attributes'],
-    );
+    ];
     if (!empty($variables['content']['comment_body']['#prefix'])) {
       $rdf_metadata['#suffix'] = $variables['content']['comment_body']['#prefix'];
     }
@@ -555,14 +555,14 @@ function rdf_preprocess_taxonomy_term(&$variables) {
   // Add RDFa markup for the taxonomy term name as metadata, if present.
   $name_field_mapping = $mapping->getPreparedFieldMapping('name');
   if (!empty($name_field_mapping) && !empty($name_field_mapping['properties'])) {
-    $name_attributes = array(
+    $name_attributes = [
       'property' => $name_field_mapping['properties'],
       'content' => $term->getName(),
-    );
-    $variables['title_suffix']['taxonomy_term_rdfa'] = array(
+    ];
+    $variables['title_suffix']['taxonomy_term_rdfa'] = [
       '#theme' => 'rdf_metadata',
-      '#metadata' => array($name_attributes),
-    );
+      '#metadata' => [$name_attributes],
+    ];
   }
 }
 
@@ -573,7 +573,7 @@ function rdf_preprocess_image(&$variables) {
   // Adds the RDF type for image.  We cannot use the usual entity-based mapping
   // to get 'foaf:Image' because image does not have its own entity type or
   // bundle.
-  $variables['attributes']['typeof'] = array('foaf:Image');
+  $variables['attributes']['typeof'] = ['foaf:Image'];
 }
 
 /**
diff --git a/core/modules/rdf/src/Entity/RdfMapping.php b/core/modules/rdf/src/Entity/RdfMapping.php
index 83fc4767d7bf58ed4d7396fa2402fa891803a447..076587fd241ae61cb933c14ea5c97842f3770094 100644
--- a/core/modules/rdf/src/Entity/RdfMapping.php
+++ b/core/modules/rdf/src/Entity/RdfMapping.php
@@ -59,20 +59,20 @@ class RdfMapping extends ConfigEntityBase implements RdfMappingInterface {
    *
    * @var array
    */
-  protected $types = array();
+  protected $types = [];
 
   /**
    * The mappings for fields on this bundle.
    *
    * @var array
    */
-  protected $fieldMappings = array();
+  protected $fieldMappings = [];
 
   /**
    * {@inheritdoc}
    */
   public function getPreparedBundleMapping() {
-    return array('types' => $this->types);
+    return ['types' => $this->types];
   }
 
   /**
@@ -80,9 +80,9 @@ public function getPreparedBundleMapping() {
    */
   public function getBundleMapping() {
     if (!empty($this->types)) {
-      return array('types' => $this->types);
+      return ['types' => $this->types];
     }
-    return array();
+    return [];
   }
 
   /**
@@ -100,16 +100,16 @@ public function setBundleMapping(array $mapping) {
    * {@inheritdoc}
    */
   public function getPreparedFieldMapping($field_name) {
-    $field_mapping = array(
+    $field_mapping = [
       'properties' => NULL,
       'datatype' => NULL,
       'datatype_callback' => NULL,
       'mapping_type' => NULL,
-    );
+    ];
     if (isset($this->fieldMappings[$field_name])) {
       $field_mapping = array_merge($field_mapping, $this->fieldMappings[$field_name]);
     }
-    return empty($field_mapping['properties']) ? array() : $field_mapping;
+    return empty($field_mapping['properties']) ? [] : $field_mapping;
   }
 
   /**
@@ -119,13 +119,13 @@ public function getFieldMapping($field_name) {
     if (isset($this->fieldMappings[$field_name])) {
       return $this->fieldMappings[$field_name];
     }
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function setFieldMapping($field_name, array $mapping = array()) {
+  public function setFieldMapping($field_name, array $mapping = []) {
     $this->fieldMappings[$field_name] = $mapping;
     return $this;
   }
diff --git a/core/modules/rdf/src/RdfMappingInterface.php b/core/modules/rdf/src/RdfMappingInterface.php
index fa8def268e54ed5af4fa078a7215e6eb82b234dd..ce0128848a48d975b720ee05c684a8719c856357 100644
--- a/core/modules/rdf/src/RdfMappingInterface.php
+++ b/core/modules/rdf/src/RdfMappingInterface.php
@@ -102,6 +102,6 @@ public function getFieldMapping($field_name);
    * @return \Drupal\rdf\Entity\RdfMapping
    *   The RdfMapping object.
    */
-  public function setFieldMapping($field_name, array $mapping = array());
+  public function setFieldMapping($field_name, array $mapping = []);
 
 }
diff --git a/core/modules/rdf/src/Tests/CommentAttributesTest.php b/core/modules/rdf/src/Tests/CommentAttributesTest.php
index 5febcb988551a69ef6ab84258874a2511f27955a..f05d9c1de7b4ef01308fdef33f2828840ad5beba 100644
--- a/core/modules/rdf/src/Tests/CommentAttributesTest.php
+++ b/core/modules/rdf/src/Tests/CommentAttributesTest.php
@@ -20,7 +20,7 @@ class CommentAttributesTest extends CommentTestBase {
    *
    * @var array
    */
-  public static $modules = array('views', 'node', 'comment', 'rdf');
+  public static $modules = ['views', 'node', 'comment', 'rdf'];
 
   /**
    * URI of the front page of the Drupal site.
@@ -40,11 +40,11 @@ protected function setUp() {
     parent::setUp();
 
     // Enables anonymous user comments.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
       'access comments' => TRUE,
       'post comments' => TRUE,
       'skip comment approval' => TRUE,
-    ));
+    ]);
     // Allows anonymous to leave their contact information.
     $this->setCommentAnonymous(COMMENT_ANONYMOUS_MAY_CONTACT);
     $this->setCommentPreview(DRUPAL_OPTIONAL);
@@ -58,53 +58,53 @@ protected function setUp() {
 
     // Set relation between node and comment.
     $article_mapping = rdf_get_mapping('node', 'article');
-    $comment_count_mapping = array(
-      'properties' => array('sioc:num_replies'),
+    $comment_count_mapping = [
+      'properties' => ['sioc:num_replies'],
       'datatype' => 'xsd:integer',
-      'datatype_callback' => array('callable' => 'Drupal\rdf\CommonDataConverter::rawValue'),
-    );
+      'datatype_callback' => ['callable' => 'Drupal\rdf\CommonDataConverter::rawValue'],
+    ];
     $article_mapping->setFieldMapping('comment_count', $comment_count_mapping)->save();
 
     // Save user mapping.
     $user_mapping = rdf_get_mapping('user', 'user');
-    $username_mapping = array(
-      'properties' => array('foaf:name'),
-    );
+    $username_mapping = [
+      'properties' => ['foaf:name'],
+    ];
     $user_mapping->setFieldMapping('name', $username_mapping)->save();
-    $user_mapping->setFieldMapping('homepage', array('properties' => array('foaf:page'), 'mapping_type' => 'rel'))->save();
+    $user_mapping->setFieldMapping('homepage', ['properties' => ['foaf:page'], 'mapping_type' => 'rel'])->save();
 
     // Save comment mapping.
     $mapping = rdf_get_mapping('comment', 'comment');
-    $mapping->setBundleMapping(array('types' => array('sioc:Post', 'sioct:Comment')))->save();
-    $field_mappings = array(
-      'subject' => array(
-        'properties' => array('dc:title'),
-      ),
-      'created' => array(
-        'properties' => array('dc:date', 'dc:created'),
+    $mapping->setBundleMapping(['types' => ['sioc:Post', 'sioct:Comment']])->save();
+    $field_mappings = [
+      'subject' => [
+        'properties' => ['dc:title'],
+      ],
+      'created' => [
+        'properties' => ['dc:date', 'dc:created'],
         'datatype' => 'xsd:dateTime',
-        'datatype_callback' => array('callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'),
-      ),
-      'changed' => array(
-        'properties' => array('dc:modified'),
+        'datatype_callback' => ['callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'],
+      ],
+      'changed' => [
+        'properties' => ['dc:modified'],
         'datatype' => 'xsd:dateTime',
-        'datatype_callback' => array('callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'),
-      ),
-      'comment_body' => array(
-        'properties' => array('content:encoded'),
-      ),
-      'pid' => array(
-        'properties' => array('sioc:reply_of'),
+        'datatype_callback' => ['callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'],
+      ],
+      'comment_body' => [
+        'properties' => ['content:encoded'],
+      ],
+      'pid' => [
+        'properties' => ['sioc:reply_of'],
         'mapping_type' => 'rel',
-      ),
-      'uid' => array(
-        'properties' => array('sioc:has_creator'),
+      ],
+      'uid' => [
+        'properties' => ['sioc:has_creator'],
         'mapping_type' => 'rel',
-      ),
-      'name' => array(
-        'properties' => array('foaf:name'),
-      ),
-    );
+      ],
+      'name' => [
+        'properties' => ['foaf:name'],
+      ],
+    ];
     // Iterate over shared field mappings and save.
     foreach ($field_mappings as $field_name => $field_mapping) {
       $mapping->setFieldMapping($field_name, $field_mapping)->save();
@@ -126,11 +126,11 @@ public function testNumberOfCommentsRdfaMarkup() {
     $parser->parse($graph, $this->drupalGet('node'), 'rdfa', $this->baseUri);
 
     // Number of comments.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => 2,
       'datatype' => 'http://www.w3.org/2001/XMLSchema#integer',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->nodeUri, 'http://rdfs.org/sioc/ns#num_replies', $expected_value), 'Number of comments found in RDF output of teaser view (sioc:num_replies).');
 
     // Tests number of comments in full node view, expected value is the same.
@@ -183,7 +183,7 @@ public function testCommentRdfaMarkup() {
     $this->_testBasicCommentRdfaMarkup($graph, $comment1);
 
     // Posts comment #2 as anonymous user.
-    $anonymous_user = array();
+    $anonymous_user = [];
     $anonymous_user['name'] = $this->randomMachineName();
     $anonymous_user['mail'] = 'tester@simpletest.org';
     $anonymous_user['homepage'] = 'http://example.org/';
@@ -222,22 +222,22 @@ public function testCommentReplyOfRdfaMarkup() {
     $parser->parse($graph, $this->drupalGet('node/' . $this->node->id()), 'rdfa', $this->baseUri);
 
     // Tests the reply_of relationship of a first level comment.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $this->nodeUri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_1_uri, 'http://rdfs.org/sioc/ns#reply_of', $expected_value), 'Comment relation to its node found in RDF output (sioc:reply_of).');
 
     // Tests the reply_of relationship of a second level comment.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $this->nodeUri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_2_uri, 'http://rdfs.org/sioc/ns#reply_of', $expected_value), 'Comment relation to its node found in RDF output (sioc:reply_of).');
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $comment_1_uri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_2_uri, 'http://rdfs.org/sioc/ns#reply_of', $expected_value), 'Comment relation to its parent comment found in RDF output (sioc:reply_of).');
   }
 
@@ -251,61 +251,61 @@ public function testCommentReplyOfRdfaMarkup() {
    * @param $account
    *   An array containing information about an anonymous user.
    */
-  function _testBasicCommentRdfaMarkup($graph, CommentInterface $comment, $account = array()) {
-    $comment_uri = $comment->url('canonical', array('absolute' => TRUE));
+  function _testBasicCommentRdfaMarkup($graph, CommentInterface $comment, $account = []) {
+    $comment_uri = $comment->url('canonical', ['absolute' => TRUE]);
 
     // Comment type.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => 'http://rdfs.org/sioc/types#Comment',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Comment type found in RDF output (sioct:Comment).');
     // Comment type.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => 'http://rdfs.org/sioc/ns#Post',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Comment type found in RDF output (sioc:Post).');
 
     // Comment title.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $comment->getSubject(),
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_uri, 'http://purl.org/dc/terms/title', $expected_value), 'Comment subject found in RDF output (dc:title).');
 
     // Comment date.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => format_date($comment->getCreatedTime(), 'custom', 'c', 'UTC'),
       'datatype' => 'http://www.w3.org/2001/XMLSchema#dateTime',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_uri, 'http://purl.org/dc/terms/date', $expected_value), 'Comment date found in RDF output (dc:date).');
     // Comment date.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => format_date($comment->getCreatedTime(), 'custom', 'c', 'UTC'),
       'datatype' => 'http://www.w3.org/2001/XMLSchema#dateTime',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_uri, 'http://purl.org/dc/terms/created', $expected_value), 'Comment date found in RDF output (dc:created).');
 
     // Comment body.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $comment->comment_body->value . "\n",
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($comment_uri, 'http://purl.org/rss/1.0/modules/content/encoded', $expected_value), 'Comment body found in RDF output (content:encoded).');
 
     // The comment author can be a registered user or an anonymous user.
     if ($comment->getOwnerId() > 0) {
-      $author_uri = \Drupal::url('entity.user.canonical', ['user' => $comment->getOwnerId()], array('absolute' => TRUE));
+      $author_uri = \Drupal::url('entity.user.canonical', ['user' => $comment->getOwnerId()], ['absolute' => TRUE]);
       // Comment relation to author.
-      $expected_value = array(
+      $expected_value = [
         'type' => 'uri',
         'value' => $author_uri,
-      );
+      ];
       $this->assertTrue($graph->hasProperty($comment_uri, 'http://rdfs.org/sioc/ns#has_creator', $expected_value), 'Comment relation to author found in RDF output (sioc:has_creator).');
     }
     else {
@@ -321,18 +321,18 @@ function _testBasicCommentRdfaMarkup($graph, CommentInterface $comment, $account
 
     // Author name.
     $name = empty($account["name"]) ? $this->webUser->getUsername() : $account["name"] . " (not verified)";
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $name,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($author_uri, 'http://xmlns.com/foaf/0.1/name', $expected_value), 'Comment author name found in RDF output (foaf:name).');
 
     // Comment author homepage (only for anonymous authors).
     if ($comment->getOwnerId() == 0) {
-      $expected_value = array(
+      $expected_value = [
         'type' => 'uri',
         'value' => 'http://example.org/',
-      );
+      ];
       $this->assertTrue($graph->hasProperty($author_uri, 'http://xmlns.com/foaf/0.1/page', $expected_value), 'Comment author link found in RDF output (foaf:page).');
     }
   }
@@ -354,7 +354,7 @@ function _testBasicCommentRdfaMarkup($graph, CommentInterface $comment, $account
    *   The saved comment.
    */
   function saveComment($nid, $uid, $contact = NULL, $pid = 0) {
-    $values = array(
+    $values = [
       'entity_id' => $nid,
       'entity_type' => 'node',
       'field_name' => 'comment',
@@ -363,7 +363,7 @@ function saveComment($nid, $uid, $contact = NULL, $pid = 0) {
       'subject' => $this->randomMachineName(),
       'comment_body' => $this->randomMachineName(),
       'status' => 1,
-    );
+    ];
     if ($contact) {
       $values += $contact;
     }
diff --git a/core/modules/rdf/src/Tests/GetNamespacesTest.php b/core/modules/rdf/src/Tests/GetNamespacesTest.php
index 8aeaf7992b85583e96f5e88e038ff200bda754f6..0b19277506287a4ca22be6f75edcfd6564c62d91 100644
--- a/core/modules/rdf/src/Tests/GetNamespacesTest.php
+++ b/core/modules/rdf/src/Tests/GetNamespacesTest.php
@@ -17,7 +17,7 @@ class GetNamespacesTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf', 'rdf_test_namespaces');
+  public static $modules = ['rdf', 'rdf_test_namespaces'];
 
   /**
    * Tests RDF namespaces.
@@ -26,24 +26,24 @@ function testGetRdfNamespaces() {
     // Fetches the front page and extracts RDFa 1.1 prefixes.
     $this->drupalGet('');
 
-    $element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', array(
+    $element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', [
       ':prefix_binding' => 'rdfs: http://www.w3.org/2000/01/rdf-schema#',
-    ));
+    ]);
     $this->assertTrue(!empty($element), 'A prefix declared once is displayed.');
 
-    $element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', array(
+    $element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', [
       ':prefix_binding' => 'foaf: http://xmlns.com/foaf/0.1/',
-    ));
+    ]);
     $this->assertTrue(!empty($element), 'The same prefix declared in several implementations of hook_rdf_namespaces() is valid as long as all the namespaces are the same.');
 
-    $element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', array(
+    $element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', [
       ':prefix_binding' => 'foaf1: http://xmlns.com/foaf/0.1/',
-    ));
+    ]);
     $this->assertTrue(!empty($element), 'Two prefixes can be assigned the same namespace.');
 
-    $element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', array(
+    $element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', [
       ':prefix_binding' => 'dc: http://purl.org/dc/terms/',
-    ));
+    ]);
     $this->assertTrue(!empty($element), 'When a prefix has conflicting namespaces, the first declared one is used.');
   }
 
diff --git a/core/modules/rdf/src/Tests/ImageFieldAttributesTest.php b/core/modules/rdf/src/Tests/ImageFieldAttributesTest.php
index cce663bae560075e96c0164b47947f9ee0779d03..2944b8fcabcdccc0b45f9f8f7e1a1b42ac0d9b3d 100644
--- a/core/modules/rdf/src/Tests/ImageFieldAttributesTest.php
+++ b/core/modules/rdf/src/Tests/ImageFieldAttributesTest.php
@@ -19,7 +19,7 @@ class ImageFieldAttributesTest extends ImageFieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf', 'image');
+  public static $modules = ['rdf', 'image'];
 
   /**
    * The name of the image field used in the test.
@@ -52,11 +52,11 @@ protected function setUp() {
 
     // Set the RDF mapping for the new field.
     rdf_get_mapping('node', 'article')
-      ->setFieldMapping($this->fieldName, array(
-        'properties' => array('og:image'),
+      ->setFieldMapping($this->fieldName, [
+        'properties' => ['og:image'],
         'mapping_type' => 'rel',
-      ))
-      ->setBundleMapping(array('types' => array()))
+      ])
+      ->setBundleMapping(['types' => []])
       ->save();
 
     // Get the test image that simpletest provides.
@@ -73,10 +73,10 @@ protected function setUp() {
    */
   function testNodeTeaser() {
     // Set the display options for the teaser.
-    $display_options = array(
+    $display_options = [
       'type' => 'image',
-      'settings' => array('image_style' => 'medium', 'image_link' => 'content'),
-    );
+      'settings' => ['image_style' => 'medium', 'image_link' => 'content'],
+    ];
     $display = entity_get_display('node', 'article', 'teaser');
     $display->setComponent($this->fieldName, $display_options)
       ->save();
@@ -96,17 +96,17 @@ function testNodeTeaser() {
     $image_uri = ImageStyle::load('medium')->buildUrl($this->file->getFileUri());
 
     // Test relations from node to image.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $image_uri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://ogp.me/ns#image', $expected_value), 'Node to file relation found in RDF output (og:image).');
 
     // Test image type.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => 'http://xmlns.com/foaf/0.1/Image',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($image_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Image type found in RDF output (foaf:Image).');
   }
 
diff --git a/core/modules/rdf/tests/rdf_conflicting_namespaces/rdf_conflicting_namespaces.module b/core/modules/rdf/tests/rdf_conflicting_namespaces/rdf_conflicting_namespaces.module
index 2fbdba4a666724b783b1ce7dc9cb6a66c126ba4f..ddaf5cbe9819f9bb7b710dccfb8a9d0e84148f11 100644
--- a/core/modules/rdf/tests/rdf_conflicting_namespaces/rdf_conflicting_namespaces.module
+++ b/core/modules/rdf/tests/rdf_conflicting_namespaces/rdf_conflicting_namespaces.module
@@ -9,7 +9,7 @@
  * Implements hook_rdf_namespaces().
  */
 function rdf_conflicting_namespaces_rdf_namespaces() {
-  return array(
+  return [
     'dc' => 'http://purl.org/conflicting/namespace',
-  );
+  ];
 }
diff --git a/core/modules/rdf/tests/rdf_test_namespaces/rdf_test_namespaces.module b/core/modules/rdf/tests/rdf_test_namespaces/rdf_test_namespaces.module
index d44c51977e73eae692c365de9c54b90a194e473b..327bd5bc8419c16840e0db12649839e99e7ed43f 100644
--- a/core/modules/rdf/tests/rdf_test_namespaces/rdf_test_namespaces.module
+++ b/core/modules/rdf/tests/rdf_test_namespaces/rdf_test_namespaces.module
@@ -9,8 +9,8 @@
  * Implements hook_rdf_namespaces().
  */
 function rdf_test_namespaces_rdf_namespaces() {
-  return array(
+  return [
     'foaf'     => 'http://xmlns.com/foaf/0.1/',
     'foaf1'    => 'http://xmlns.com/foaf/0.1/',
-  );
+  ];
 }
diff --git a/core/modules/rdf/tests/src/Functional/EntityReferenceFieldAttributesTest.php b/core/modules/rdf/tests/src/Functional/EntityReferenceFieldAttributesTest.php
index 4aaeb7ea0a2da200303a65222db0ed87e2d8b0b9..82789d6d058d9c461642c0f9fc61a7c072bb716c 100644
--- a/core/modules/rdf/tests/src/Functional/EntityReferenceFieldAttributesTest.php
+++ b/core/modules/rdf/tests/src/Functional/EntityReferenceFieldAttributesTest.php
@@ -17,7 +17,7 @@ class EntityReferenceFieldAttributesTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf', 'field_test', 'file', 'image');
+  public static $modules = ['rdf', 'field_test', 'file', 'image'];
 
   /**
    * The name of the taxonomy term reference field used in the test.
@@ -36,38 +36,38 @@ class EntityReferenceFieldAttributesTest extends TaxonomyTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $web_user = $this->drupalCreateUser(array('bypass node access', 'administer taxonomy'));
+    $web_user = $this->drupalCreateUser(['bypass node access', 'administer taxonomy']);
     $this->drupalLogin($web_user);
     $this->vocabulary = $this->createVocabulary();
 
     // Create the field.
     $this->fieldName = 'field_taxonomy_test';
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $this->fieldName, 'Tags', 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($this->fieldName, array('type' => 'options_select'))
+      ->setComponent($this->fieldName, ['type' => 'options_select'])
       ->save();
     entity_get_display('node', 'article', 'full')
-      ->setComponent($this->fieldName, array('type' => 'entity_reference_label'))
+      ->setComponent($this->fieldName, ['type' => 'entity_reference_label'])
       ->save();
 
     // Set the RDF mapping for the new field.
     rdf_get_mapping('node', 'article')
-      ->setFieldMapping($this->fieldName, array(
-        'properties' => array('dc:subject'),
+      ->setFieldMapping($this->fieldName, [
+        'properties' => ['dc:subject'],
         'mapping_type' => 'rel',
-      ))
+      ])
       ->save();
 
     rdf_get_mapping('taxonomy_term', $this->vocabulary->id())
-      ->setBundleMapping(array('types' => array('skos:Concept')))
-      ->setFieldMapping('name', array('properties' => array('rdfs:label')))
+      ->setBundleMapping(['types' => ['skos:Concept']])
+      ->setFieldMapping('name', ['properties' => ['rdfs:label']])
       ->save();
   }
 
@@ -80,7 +80,7 @@ protected function setUp() {
   function testNodeTeaser() {
     // Set the teaser display to show this field.
     entity_get_display('node', 'article', 'teaser')
-      ->setComponent($this->fieldName, array('type' => 'entity_reference_label'))
+      ->setComponent($this->fieldName, ['type' => 'entity_reference_label'])
       ->save();
 
     // Create a term in each vocabulary.
@@ -90,14 +90,14 @@ function testNodeTeaser() {
     $taxonomy_term_2_uri = $term2->url('canonical', ['absolute' => TRUE]);
 
     // Create the node.
-    $node = $this->drupalCreateNode(array('type' => 'article'));
-    $node->set($this->fieldName, array(
-      array('target_id' => $term1->id()),
-      array('target_id' => $term2->id()),
-    ));
+    $node = $this->drupalCreateNode(['type' => 'article']);
+    $node->set($this->fieldName, [
+      ['target_id' => $term1->id()],
+      ['target_id' => $term2->id()],
+    ]);
 
     // Render the node.
-    $node_render_array = entity_view_multiple(array($node), 'teaser');
+    $node_render_array = entity_view_multiple([$node], 'teaser');
     $html = \Drupal::service('renderer')->renderRoot($node_render_array);
 
     // Parse the teaser.
@@ -108,39 +108,39 @@ function testNodeTeaser() {
 
     // Node relations to taxonomy terms.
     $node_uri = $node->url('canonical', ['absolute' => TRUE]);
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $taxonomy_term_1_uri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://purl.org/dc/terms/subject', $expected_value), 'Node to term relation found in RDF output (dc:subject).');
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $taxonomy_term_2_uri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://purl.org/dc/terms/subject', $expected_value), 'Node to term relation found in RDF output (dc:subject).');
     // Taxonomy terms triples.
     // Term 1.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => 'http://www.w3.org/2004/02/skos/core#Concept',
-    );
+    ];
     // @todo Enable with https://www.drupal.org/node/2072791.
     //$this->assertTrue($graph->hasProperty($taxonomy_term_1_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Taxonomy term type found in RDF output (skos:Concept).');
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $term1->getName(),
-    );
+    ];
     //$this->assertTrue($graph->hasProperty($taxonomy_term_1_uri, 'http://www.w3.org/2000/01/rdf-schema#label', $expected_value), 'Taxonomy term name found in RDF output (rdfs:label).');
     // Term 2.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => 'http://www.w3.org/2004/02/skos/core#Concept',
-    );
+    ];
     //$this->assertTrue($graph->hasProperty($taxonomy_term_2_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Taxonomy term type found in RDF output (skos:Concept).');
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $term2->getName(),
-    );
+    ];
     //$this->assertTrue($graph->hasProperty($taxonomy_term_2_uri, 'http://www.w3.org/2000/01/rdf-schema#label', $expected_value), 'Taxonomy term name found in RDF output (rdfs:label).');
   }
 
diff --git a/core/modules/rdf/tests/src/Functional/FileFieldAttributesTest.php b/core/modules/rdf/tests/src/Functional/FileFieldAttributesTest.php
index b0be9224ffc9bd8788f2a0c5de0f8ed507af5110..e3e45bad3e65afd12b5c8a17a9377e9fe33d4bb0 100644
--- a/core/modules/rdf/tests/src/Functional/FileFieldAttributesTest.php
+++ b/core/modules/rdf/tests/src/Functional/FileFieldAttributesTest.php
@@ -17,7 +17,7 @@ class FileFieldAttributesTest extends FileFieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf', 'file');
+  public static $modules = ['rdf', 'file'];
 
   /**
    * The name of the file field used in the test.
@@ -50,19 +50,19 @@ protected function setUp() {
 
     // Set the teaser display to show this field.
     entity_get_display('node', 'article', 'teaser')
-      ->setComponent($this->fieldName, array('type' => 'file_default'))
+      ->setComponent($this->fieldName, ['type' => 'file_default'])
       ->save();
 
     // Set the RDF mapping for the new field.
     $mapping = rdf_get_mapping('node', 'article');
-    $mapping->setFieldMapping($this->fieldName, array('properties' => array('rdfs:seeAlso'), 'mapping_type' => 'rel'))->save();
+    $mapping->setFieldMapping($this->fieldName, ['properties' => ['rdfs:seeAlso'], 'mapping_type' => 'rel'])->save();
 
     $test_file = $this->getTestFile('text');
 
     // Create a new node with the uploaded file.
     $nid = $this->uploadNodeFile($test_file, $this->fieldName, $type_name);
 
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $this->node = $node_storage->load($nid);
     $this->file = File::load($this->node->{$this->fieldName}->target_id);
   }
@@ -75,7 +75,7 @@ protected function setUp() {
    */
   function testNodeTeaser() {
     // Render the teaser.
-    $node_render_array = entity_view_multiple(array($this->node), 'teaser');
+    $node_render_array = entity_view_multiple([$this->node], 'teaser');
     $html = \Drupal::service('renderer')->renderRoot($node_render_array);
 
     // Parses front page where the node is displayed in its teaser form.
@@ -88,10 +88,10 @@ function testNodeTeaser() {
     $file_uri = file_create_url($this->file->getFileUri());
 
     // Node relation to attached file.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $file_uri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://www.w3.org/2000/01/rdf-schema#seeAlso', $expected_value), 'Node to file relation found in RDF output (rdfs:seeAlso).');
     $this->drupalGet('node');
   }
diff --git a/core/modules/rdf/tests/src/Functional/GetRdfNamespacesTest.php b/core/modules/rdf/tests/src/Functional/GetRdfNamespacesTest.php
index 544b598f807fab72c3e5c0fa50ccbf926fb0092d..c316f3fb076a509cf3260b657f3f4eb4299cbf21 100644
--- a/core/modules/rdf/tests/src/Functional/GetRdfNamespacesTest.php
+++ b/core/modules/rdf/tests/src/Functional/GetRdfNamespacesTest.php
@@ -16,7 +16,7 @@ class GetRdfNamespacesTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf', 'rdf_test_namespaces');
+  public static $modules = ['rdf', 'rdf_test_namespaces'];
 
   /**
    * Tests getting RDF namespaces.
@@ -31,7 +31,7 @@ function testGetRdfNamespaces() {
 
     // Enable rdf_conflicting_namespaces to ensure that an exception is thrown
     // when RDF namespaces are conflicting.
-    \Drupal::service('module_installer')->install(array('rdf_conflicting_namespaces'), TRUE);
+    \Drupal::service('module_installer')->install(['rdf_conflicting_namespaces'], TRUE);
     try {
       $ns = rdf_get_namespaces();
       $this->fail('Expected exception not thrown for conflicting namespace declaration.');
diff --git a/core/modules/rdf/tests/src/Functional/NodeAttributesTest.php b/core/modules/rdf/tests/src/Functional/NodeAttributesTest.php
index e0b8bdf30d71dd74f60f83b312467b282818690f..bf65f1b9005b2874a44345acb754450b607ce34e 100644
--- a/core/modules/rdf/tests/src/Functional/NodeAttributesTest.php
+++ b/core/modules/rdf/tests/src/Functional/NodeAttributesTest.php
@@ -16,23 +16,23 @@ class NodeAttributesTest extends NodeTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf');
+  public static $modules = ['rdf'];
 
   protected function setUp() {
     parent::setUp();
 
     rdf_get_mapping('node', 'article')
-      ->setBundleMapping(array(
-        'types' => array('sioc:Item', 'foaf:Document'),
-      ))
-      ->setFieldMapping('title', array(
-        'properties' => array('dc:title'),
-      ))
-      ->setFieldMapping('created', array(
-        'properties' => array('dc:date', 'dc:created'),
+      ->setBundleMapping([
+        'types' => ['sioc:Item', 'foaf:Document'],
+      ])
+      ->setFieldMapping('title', [
+        'properties' => ['dc:title'],
+      ])
+      ->setFieldMapping('created', [
+        'properties' => ['dc:date', 'dc:created'],
         'datatype' => 'xsd:dateTime',
-        'datatype_callback' => array('callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'),
-      ))
+        'datatype_callback' => ['callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'],
+      ])
       ->save();
   }
 
@@ -42,10 +42,10 @@ protected function setUp() {
   function testNodeAttributes() {
     // Create node with single quotation mark title to ensure it does not get
     // escaped more than once.
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'type' => 'article',
       'title' => $this->randomMachineName(8) . "'",
-    ));
+    ]);
 
     $node_uri = $node->url('canonical', ['absolute' => TRUE]);
     $base_uri = \Drupal::url('<front>', [], ['absolute' => TRUE]);
@@ -57,37 +57,37 @@ function testNodeAttributes() {
 
     // Inspects RDF graph output.
     // Node type.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => 'http://rdfs.org/sioc/ns#Item',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Node type found in RDF output (sioc:Item).');
     // Node type.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => 'http://xmlns.com/foaf/0.1/Document',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Node type found in RDF output (foaf:Document).');
     // Node title.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $node->getTitle(),
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://purl.org/dc/terms/title', $expected_value), 'Node title found in RDF output (dc:title).');
     // Node date (date format must be UTC).
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => \Drupal::service('date.formatter')->format($node->getCreatedTime(), 'custom', 'c', 'UTC'),
       'datatype' => 'http://www.w3.org/2001/XMLSchema#dateTime',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://purl.org/dc/terms/date', $expected_value), 'Node date found in RDF output (dc:date).');
     // Node date (date format must be UTC).
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => \Drupal::service('date.formatter')->format($node->getCreatedTime(), 'custom', 'c', 'UTC'),
       'datatype' => 'http://www.w3.org/2001/XMLSchema#dateTime',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($node_uri, 'http://purl.org/dc/terms/created', $expected_value), 'Node date found in RDF output (dc:created).');
   }
 
diff --git a/core/modules/rdf/tests/src/Functional/StandardProfileTest.php b/core/modules/rdf/tests/src/Functional/StandardProfileTest.php
index 7d299051d89ee165591cbe2d4a1ceff74145c8d2..76ae39bc8a0a6c3996a58ecdda5560654225388b 100644
--- a/core/modules/rdf/tests/src/Functional/StandardProfileTest.php
+++ b/core/modules/rdf/tests/src/Functional/StandardProfileTest.php
@@ -112,18 +112,18 @@ protected function setUp() {
     $this->baseUri = \Drupal::url('<front>', [], ['absolute' => TRUE]);
 
     // Create two test users.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer content types',
       'administer comments',
       'access comments',
       'access content',
-    ));
-    $this->webUser = $this->drupalCreateUser(array(
+    ]);
+    $this->webUser = $this->drupalCreateUser([
       'access comments',
       'post comments',
       'skip comment approval',
       'access content',
-    ));
+    ]);
 
     $this->drupalLogin($this->adminUser);
 
@@ -141,20 +141,20 @@ protected function setUp() {
     $this->image->save();
 
     // Create article.
-    $article_settings = array(
+    $article_settings = [
       'type' => 'article',
       'promote' => NodeInterface::PROMOTED,
-      'field_image' => array(
-        array(
+      'field_image' => [
+        [
           'target_id' => $this->image->id(),
-        ),
-      ),
-      'field_tags' => array(
-        array(
+        ],
+      ],
+      'field_tags' => [
+        [
           'target_id' => $this->term->id(),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     $this->article = $this->drupalCreateNode($article_settings);
     // Create second article to test teaser list.
     $this->drupalCreateNode(['type' => 'article', 'promote' => NodeInterface::PROMOTED]);
@@ -163,24 +163,24 @@ protected function setUp() {
     $this->articleComment = $this->saveComment($this->article->id(), $this->webUser->id(), NULL, 0);
 
     // Create page.
-    $this->page = $this->drupalCreateNode(array('type' => 'page'));
+    $this->page = $this->drupalCreateNode(['type' => 'page']);
 
     // Set URIs.
     // Image.
     $image_file = $this->article->get('field_image')->entity;
     $this->imageUri = ImageStyle::load('large')->buildUrl($image_file->getFileUri());
     // Term.
-    $this->termUri = $this->term->url('canonical', array('absolute' => TRUE));
+    $this->termUri = $this->term->url('canonical', ['absolute' => TRUE]);
     // Article.
-    $this->articleUri = $this->article->url('canonical', array('absolute' => TRUE));
+    $this->articleUri = $this->article->url('canonical', ['absolute' => TRUE]);
     // Page.
-    $this->pageUri = $this->page->url('canonical', array('absolute' => TRUE));
+    $this->pageUri = $this->page->url('canonical', ['absolute' => TRUE]);
     // Author.
-    $this->authorUri = $this->adminUser->url('canonical', array('absolute' => TRUE));
+    $this->authorUri = $this->adminUser->url('canonical', ['absolute' => TRUE]);
     // Comment.
-    $this->articleCommentUri = $this->articleComment->url('canonical', array('absolute' => TRUE));
+    $this->articleCommentUri = $this->articleComment->url('canonical', ['absolute' => TRUE]);
     // Commenter.
-    $this->commenterUri = $this->webUser->url('canonical', array('absolute' => TRUE));
+    $this->commenterUri = $this->webUser->url('canonical', ['absolute' => TRUE]);
 
     $this->drupalLogout();
   }
@@ -211,11 +211,11 @@ protected function doFrontPageRdfaTests() {
     $this->assertEqual(2, count($graph->allOfType('http://schema.org/Article')), 'Two articles found on front page.');
 
     // Test interaction count.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => 'UserComments:1',
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleUri, 'http://schema.org/interactionCount', $expected_value), "Teaser comment count was found (schema:interactionCount).");
 
     // Test the properties that are common between pages and articles and are
@@ -228,10 +228,10 @@ protected function doFrontPageRdfaTests() {
     //   image, move this to testArticleProperties().
     $image_file = $this->article->get('field_image')->entity;
     $image_uri = ImageStyle::load('medium')->buildUrl($image_file->getFileUri());
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $image_uri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleUri, 'http://schema.org/image', $expected_value), "Teaser image was found (schema:image).");
   }
 
@@ -258,10 +258,10 @@ protected function doArticleRdfaTests() {
 
     // @todo Once the image points to the original instead of the processed
     //   image, move this to testArticleProperties().
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $this->imageUri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleUri, 'http://schema.org/image', $expected_value), "Article image was found (schema:image).");
   }
 
@@ -303,10 +303,10 @@ protected function doUserRdfaTests() {
     $this->assertEqual($graph->type($this->authorUri), 'schema:Person', "User type was found (schema:Person) on user page.");
 
     // User name.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $this->adminUser->label(),
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->authorUri, 'http://schema.org/name', $expected_value), "User name was found (schema:name) on user page.");
 
     $this->drupalLogout();
@@ -323,11 +323,11 @@ protected function doTermRdfaTests() {
     $this->assertEqual($graph->type($this->termUri), 'schema:Thing', "Term type was found (schema:Thing) on term page.");
 
     // Term name.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $this->term->getName(),
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->termUri, 'http://schema.org/name', $expected_value), "Term name was found (schema:name) on term page.");
 
     // @todo Add test for term description once it is a field:
@@ -345,47 +345,47 @@ protected function doTermRdfaTests() {
    *   The word to use in the test assertion message.
    */
   protected function assertRdfaCommonNodeProperties($graph, NodeInterface $node, $message_prefix) {
-    $uri = $node->url('canonical', array('absolute' => TRUE));
+    $uri = $node->url('canonical', ['absolute' => TRUE]);
 
     // Title.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $node->get('title')->value,
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($uri, 'http://schema.org/name', $expected_value), "$message_prefix title was found (schema:name).");
 
     // Created date.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => format_date($node->get('created')->value, 'custom', 'c', 'UTC'),
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($uri, 'http://schema.org/dateCreated', $expected_value), "$message_prefix created date was found (schema:dateCreated) in teaser.");
 
     // Body.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $node->get('body')->value,
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($uri, 'http://schema.org/text', $expected_value), "$message_prefix body was found (schema:text) in teaser.");
 
     // Author.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $this->authorUri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($uri, 'http://schema.org/author', $expected_value), "$message_prefix author was found (schema:author) in teaser.");
 
     // Author type.
     $this->assertEqual($graph->type($this->authorUri), 'schema:Person', "$message_prefix author type was found (schema:Person).");
 
     // Author name.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $this->adminUser->label(),
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->authorUri, 'http://schema.org/name', $expected_value), "$message_prefix author name was found (schema:name).");
   }
 
@@ -399,10 +399,10 @@ protected function assertRdfaCommonNodeProperties($graph, NodeInterface $node, $
    */
   protected function assertRdfaArticleProperties($graph, $message_prefix) {
     // Tags.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $this->termUri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleUri, 'http://schema.org/about', $expected_value), "$message_prefix tag was found (schema:about).");
 
     // Tag type.
@@ -410,11 +410,11 @@ protected function assertRdfaArticleProperties($graph, $message_prefix) {
     //$this->assertEqual($graph->type($this->termUri), 'schema:Thing', 'Tag type was found (schema:Thing).');
 
     // Tag name.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $this->term->getName(),
       'lang' => 'en',
-    );
+    ];
     // @todo Enable with https://www.drupal.org/node/2072791.
     //$this->assertTrue($graph->hasProperty($this->termUri, 'http://schema.org/name', $expected_value), "$message_prefix name was found (schema:name).");
   }
@@ -427,58 +427,58 @@ protected function assertRdfaArticleProperties($graph, $message_prefix) {
    */
   protected function assertRdfaNodeCommentProperties($graph) {
     // Relationship between node and comment.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $this->articleCommentUri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleUri, 'http://schema.org/comment', $expected_value), 'Relationship between node and comment found (schema:comment).');
 
     // Comment type.
     $this->assertEqual($graph->type($this->articleCommentUri), 'schema:Comment', 'Comment type was found (schema:Comment).');
 
     // Comment title.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $this->articleComment->get('subject')->value,
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleCommentUri, 'http://schema.org/name', $expected_value), 'Article comment title was found (schema:name).');
 
     // Comment created date.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => format_date($this->articleComment->get('created')->value, 'custom', 'c', 'UTC'),
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleCommentUri, 'http://schema.org/dateCreated', $expected_value), 'Article comment created date was found (schema:dateCreated).');
 
     // Comment body.
     $text = $this->articleComment->get('comment_body')->value;
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       // There is an extra carriage return in the when parsing comments as
       // output by Bartik, so it must be added to the expected value.
       'value' => "$text
 ",
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleCommentUri, 'http://schema.org/text', $expected_value), 'Article comment body was found (schema:text).');
 
     // Comment uid.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => $this->commenterUri,
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->articleCommentUri, 'http://schema.org/author', $expected_value), 'Article comment author was found (schema:author).');
 
     // Comment author type.
     $this->assertEqual($graph->type($this->commenterUri), 'schema:Person', 'Comment author type was found (schema:Person).');
 
     // Comment author name.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $this->webUser->getUsername(),
-    );
+    ];
     $this->assertTrue($graph->hasProperty($this->commenterUri, 'http://schema.org/name', $expected_value), 'Comment author name was found (schema:name).');
   }
 
@@ -499,7 +499,7 @@ protected function assertRdfaNodeCommentProperties($graph) {
    *   The saved comment.
    */
   protected function saveComment($nid, $uid, $contact = NULL, $pid = 0) {
-    $values = array(
+    $values = [
       'entity_id' => $nid,
       'entity_type' => 'node',
       'field_name' => 'comment',
@@ -508,7 +508,7 @@ protected function saveComment($nid, $uid, $contact = NULL, $pid = 0) {
       'subject' => $this->randomMachineName(),
       'comment_body' => $this->randomMachineName(),
       'status' => 1,
-    );
+    ];
     if ($contact) {
       $values += $contact;
     }
diff --git a/core/modules/rdf/tests/src/Functional/TaxonomyAttributesTest.php b/core/modules/rdf/tests/src/Functional/TaxonomyAttributesTest.php
index 799b764c0489d9fec5cb2375e16f6286cc7d9ae4..b21098e6efd72509ba4f6fb395e09aeaef4c62f3 100644
--- a/core/modules/rdf/tests/src/Functional/TaxonomyAttributesTest.php
+++ b/core/modules/rdf/tests/src/Functional/TaxonomyAttributesTest.php
@@ -16,7 +16,7 @@ class TaxonomyAttributesTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf', 'views');
+  public static $modules = ['rdf', 'views'];
 
   /**
    * Vocabulary created for testing purposes.
@@ -32,10 +32,10 @@ protected function setUp() {
 
     // RDF mapping - term bundle.
     rdf_get_mapping('taxonomy_term', $this->vocabulary->id())
-      ->setBundleMapping(array('types' => array('skos:Concept')))
-      ->setFieldMapping('name', array(
-        'properties' => array('rdfs:label', 'skos:prefLabel'),
-      ))
+      ->setBundleMapping(['types' => ['skos:Concept']])
+      ->setFieldMapping('name', [
+        'properties' => ['rdfs:label', 'skos:prefLabel'],
+      ])
       ->save();
   }
 
@@ -54,24 +54,24 @@ function testTaxonomyTermRdfaAttributes() {
 
     // Inspects RDF graph output.
     // Term type.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'uri',
       'value' => 'http://www.w3.org/2004/02/skos/core#Concept',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($term_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Term type found in RDF output (skos:Concept).');
     // Term label.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $term->getName(),
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($term_uri, 'http://www.w3.org/2000/01/rdf-schema#label', $expected_value), 'Term label found in RDF output (rdfs:label).');
     // Term label.
-    $expected_value = array(
+    $expected_value = [
       'type' => 'literal',
       'value' => $term->getName(),
       'lang' => 'en',
-    );
+    ];
     $this->assertTrue($graph->hasProperty($term_uri, 'http://www.w3.org/2004/02/skos/core#prefLabel', $expected_value), 'Term label found in RDF output (skos:prefLabel).');
 
     // @todo Add test for term description once it is a field:
diff --git a/core/modules/rdf/tests/src/Functional/UserAttributesTest.php b/core/modules/rdf/tests/src/Functional/UserAttributesTest.php
index 82c70d9dbaf9147fe7b565c15bad912baedae2e1..7c16a18fef5a2d8d2d77d8ccfb999773bf4d4f15 100644
--- a/core/modules/rdf/tests/src/Functional/UserAttributesTest.php
+++ b/core/modules/rdf/tests/src/Functional/UserAttributesTest.php
@@ -16,17 +16,17 @@ class UserAttributesTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf', 'node');
+  public static $modules = ['rdf', 'node'];
 
   protected function setUp() {
     parent::setUp();
     rdf_get_mapping('user', 'user')
-      ->setBundleMapping(array(
-        'types' => array('sioc:UserAccount'),
-      ))
-      ->setFieldMapping('name', array(
-        'properties' => array('foaf:name'),
-      ))
+      ->setBundleMapping([
+        'types' => ['sioc:UserAccount'],
+      ])
+      ->setFieldMapping('name', [
+        'properties' => ['foaf:name'],
+      ])
       ->save();
   }
 
@@ -40,17 +40,17 @@ function testUserAttributesInMarkup() {
     // Creates users that should and should not be truncated
     // by template_preprocess_username (20 characters)
     // one of these users tests right on the cusp (20).
-    $user1 = $this->drupalCreateUser(array('access user profiles'));
+    $user1 = $this->drupalCreateUser(['access user profiles']);
 
-    $authors = array(
-      $this->drupalCreateUser(array(), $this->randomMachineName(30)),
-      $this->drupalCreateUser(array(), $this->randomMachineName(20)),
-      $this->drupalCreateUser(array(), $this->randomMachineName(5))
-    );
+    $authors = [
+      $this->drupalCreateUser([], $this->randomMachineName(30)),
+      $this->drupalCreateUser([], $this->randomMachineName(20)),
+      $this->drupalCreateUser([], $this->randomMachineName(5))
+    ];
 
     $this->drupalLogin($user1);
 
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
 
     /** @var \Drupal\user\UserInterface[] $authors */
     foreach ($authors as $author) {
@@ -65,21 +65,21 @@ function testUserAttributesInMarkup() {
 
       // Inspects RDF graph output.
       // User type.
-      $expected_value = array(
+      $expected_value = [
         'type' => 'uri',
         'value' => 'http://rdfs.org/sioc/ns#UserAccount',
-      );
+      ];
       $this->assertTrue($graph->hasProperty($account_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'User type found in RDF output (sioc:UserAccount).');
       // User name.
-      $expected_value = array(
+      $expected_value = [
         'type' => 'literal',
         'value' => $author->getUsername(),
-      );
+      ];
       $this->assertTrue($graph->hasProperty($account_uri, 'http://xmlns.com/foaf/0.1/name', $expected_value), 'User name found in RDF output (foaf:name).');
 
       // User creates a node.
       $this->drupalLogin($author);
-      $node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
+      $node = $this->drupalCreateNode(['type' => 'article', 'promote' => 1]);
       $this->drupalLogin($user1);
 
       // Parses the node created by the user.
@@ -90,16 +90,16 @@ function testUserAttributesInMarkup() {
 
       // Ensures the default bundle mapping for user is used on the Authored By
       // information on the node.
-      $expected_value = array(
+      $expected_value = [
         'type' => 'uri',
         'value' => 'http://rdfs.org/sioc/ns#UserAccount',
-      );
+      ];
       $this->assertTrue($graph->hasProperty($account_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'User type found in RDF output (sioc:UserAccount).');
       // User name.
-      $expected_value = array(
+      $expected_value = [
         'type' => 'literal',
         'value' => $author->getUsername(),
-      );
+      ];
       $this->assertTrue($graph->hasProperty($account_uri, 'http://xmlns.com/foaf/0.1/name', $expected_value), 'User name found in RDF output (foaf:name).');
 
     }
diff --git a/core/modules/rdf/tests/src/Kernel/CrudTest.php b/core/modules/rdf/tests/src/Kernel/CrudTest.php
index 60b4208d00b35651328d53f7968bcd7ed2580137..1dbb505c1934c6d0fbb1df0c72d8667251880392 100644
--- a/core/modules/rdf/tests/src/Kernel/CrudTest.php
+++ b/core/modules/rdf/tests/src/Kernel/CrudTest.php
@@ -16,7 +16,7 @@ class CrudTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'rdf', 'system');
+  public static $modules = ['entity_test', 'rdf', 'system'];
 
   /**
    * @var string
@@ -57,18 +57,18 @@ function testMappingCreation() {
    */
   function testBundleMapping() {
     // Test that the bundle mapping can be saved.
-    $types = array('sioc:Post', 'foaf:Document');
+    $types = ['sioc:Post', 'foaf:Document'];
     rdf_get_mapping($this->entityType, $this->bundle)
-      ->setBundleMapping(array('types' => $types))
+      ->setBundleMapping(['types' => $types])
       ->save();
     $bundle_mapping = rdf_get_mapping($this->entityType, $this->bundle)
       ->getBundleMapping();
     $this->assertEqual($types, $bundle_mapping['types'], 'Bundle mapping saved.');
 
     // Test that the bundle mapping can be edited.
-    $types = array('schema:BlogPosting');
+    $types = ['schema:BlogPosting'];
     rdf_get_mapping($this->entityType, $this->bundle)
-      ->setBundleMapping(array('types' => $types))
+      ->setBundleMapping(['types' => $types])
       ->save();
     $bundle_mapping = rdf_get_mapping($this->entityType, $this->bundle)
       ->getBundleMapping();
@@ -82,11 +82,11 @@ function testFieldMapping() {
     $field_name = 'created';
 
     // Test that the field mapping can be saved.
-    $mapping = array(
-      'properties' => array('dc:created'),
+    $mapping = [
+      'properties' => ['dc:created'],
       'datatype' => 'xsd:dateTime',
-      'datatype_callback' => array('callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'),
-    );
+      'datatype_callback' => ['callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'],
+    ];
     rdf_get_mapping($this->entityType, $this->bundle)
       ->setFieldMapping($field_name, $mapping)
       ->save();
@@ -95,11 +95,11 @@ function testFieldMapping() {
     $this->assertEqual($mapping, $field_mapping, 'Field mapping saved.');
 
     // Test that the field mapping can be edited.
-    $mapping = array(
-      'properties' => array('dc:date'),
+    $mapping = [
+      'properties' => ['dc:date'],
       'datatype' => 'foo:bar',
-      'datatype_callback' => array('callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'),
-    );
+      'datatype_callback' => ['callable' => 'Drupal\rdf\CommonDataConverter::dateIso8601Value'],
+    ];
     rdf_get_mapping($this->entityType, $this->bundle)
       ->setFieldMapping($field_name, $mapping)
       ->save();
diff --git a/core/modules/rdf/tests/src/Kernel/Field/DateTimeFieldRdfaTest.php b/core/modules/rdf/tests/src/Kernel/Field/DateTimeFieldRdfaTest.php
index a35a9c43ad05dd83188f14aa86d488d070325821..fc78691b96492c9a71233b9e4e8064d190c77b1d 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/DateTimeFieldRdfaTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/DateTimeFieldRdfaTest.php
@@ -26,7 +26,7 @@ class DateTimeFieldRdfaTest extends FieldRdfaTestBase {
   /**
   * {@inheritdoc}
   */
-  public static $modules = array('datetime');
+  public static $modules = ['datetime'];
 
   protected function setUp() {
     parent::setUp();
@@ -35,12 +35,12 @@ protected function setUp() {
 
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:dateCreated'),
-    ))->save();
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:dateCreated'],
+    ])->save();
 
     // Set up test entity.
-    $this->entity = EntityTest::create(array());
+    $this->entity = EntityTest::create([]);
     $this->entity->{$this->fieldName}->value = $this->testValue;
   }
 
@@ -48,7 +48,7 @@ protected function setUp() {
    * Tests the default formatter.
    */
   public function testDefaultFormatter() {
-    $this->assertFormatterRdfa(array('type' => 'datetime_default'), 'http://schema.org/dateCreated', array('value' => $this->testValue . 'Z', 'type' => 'literal', 'datatype' => 'http://www.w3.org/2001/XMLSchema#dateTime'));
+    $this->assertFormatterRdfa(['type' => 'datetime_default'], 'http://schema.org/dateCreated', ['value' => $this->testValue . 'Z', 'type' => 'literal', 'datatype' => 'http://www.w3.org/2001/XMLSchema#dateTime']);
   }
 
 }
diff --git a/core/modules/rdf/tests/src/Kernel/Field/EmailFieldRdfaTest.php b/core/modules/rdf/tests/src/Kernel/Field/EmailFieldRdfaTest.php
index c121751655abf77d28da0c9d28074f6221ff31c7..85ae888103be14917abc0dc397caeac5dec72a80 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/EmailFieldRdfaTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/EmailFieldRdfaTest.php
@@ -19,7 +19,7 @@ class EmailFieldRdfaTest extends FieldRdfaTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('text');
+  public static $modules = ['text'];
 
   protected function setUp() {
     parent::setUp();
@@ -28,13 +28,13 @@ protected function setUp() {
 
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:email'),
-    ))->save();
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:email'],
+    ])->save();
 
     // Set up test values.
     $this->testValue = 'test@example.com';
-    $this->entity = EntityTest::create(array());
+    $this->entity = EntityTest::create([]);
     $this->entity->{$this->fieldName}->value = $this->testValue;
   }
 
@@ -43,9 +43,9 @@ protected function setUp() {
    */
   public function testAllFormatters() {
     // Test the plain formatter.
-    $this->assertFormatterRdfa(array('type' => 'string'), 'http://schema.org/email', array('value' => $this->testValue));
+    $this->assertFormatterRdfa(['type' => 'string'], 'http://schema.org/email', ['value' => $this->testValue]);
     // Test the mailto formatter.
-    $this->assertFormatterRdfa(array('type' => 'email_mailto'), 'http://schema.org/email', array('value' => $this->testValue));
+    $this->assertFormatterRdfa(['type' => 'email_mailto'], 'http://schema.org/email', ['value' => $this->testValue]);
   }
 
 }
diff --git a/core/modules/rdf/tests/src/Kernel/Field/EntityReferenceRdfaTest.php b/core/modules/rdf/tests/src/Kernel/Field/EntityReferenceRdfaTest.php
index cefa7e0fdb7256dbaebb0c2d949e29c4f03e8a43..9312fbc929504c0c6976c22d81e10622e6b813e0 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/EntityReferenceRdfaTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/EntityReferenceRdfaTest.php
@@ -52,7 +52,7 @@ protected function setUp() {
     $this->installEntitySchema('entity_test_rev');
 
     // Give anonymous users permission to view test entities.
-    $this->installConfig(array('user'));
+    $this->installConfig(['user']);
     Role::load(RoleInterface::ANONYMOUS_ID)
       ->grantPermission('view test entity')
       ->save();
@@ -61,20 +61,20 @@ protected function setUp() {
 
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:knows'),
-    ))->save();
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:knows'],
+    ])->save();
 
     // Create the entity to be referenced.
     $this->targetEntity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => $this->randomMachineName()));
+      ->create(['name' => $this->randomMachineName()]);
     $this->targetEntity->save();
 
     // Create the entity that will have the entity reference field.
     $this->entity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => $this->randomMachineName()));
+      ->create(['name' => $this->randomMachineName()]);
     $this->entity->save();
     $this->entity->{$this->fieldName}->entity = $this->targetEntity;
     $this->uri = $this->getAbsoluteUri($this->entity);
@@ -87,9 +87,9 @@ public function testAllFormatters() {
     $entity_uri = $this->getAbsoluteUri($this->targetEntity);
 
     // Tests the label formatter.
-    $this->assertFormatterRdfa(array('type' => 'entity_reference_label'), 'http://schema.org/knows', array('value' => $entity_uri, 'type' => 'uri'));
+    $this->assertFormatterRdfa(['type' => 'entity_reference_label'], 'http://schema.org/knows', ['value' => $entity_uri, 'type' => 'uri']);
     // Tests the entity formatter.
-    $this->assertFormatterRdfa(array('type' => 'entity_reference_entity_view'), 'http://schema.org/knows', array('value' => $entity_uri, 'type' => 'uri'));
+    $this->assertFormatterRdfa(['type' => 'entity_reference_entity_view'], 'http://schema.org/knows', ['value' => $entity_uri, 'type' => 'uri']);
   }
 
 }
diff --git a/core/modules/rdf/tests/src/Kernel/Field/FieldRdfaDatatypeCallbackTest.php b/core/modules/rdf/tests/src/Kernel/Field/FieldRdfaDatatypeCallbackTest.php
index 1e1a809f6be9584f766ea550b7ea1742485988a3..94f7f24dac13d1932031f0d1c3b2b5bc30cdbe39 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/FieldRdfaDatatypeCallbackTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/FieldRdfaDatatypeCallbackTest.php
@@ -19,23 +19,23 @@ class FieldRdfaDatatypeCallbackTest extends FieldRdfaTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('text', 'filter');
+  public static $modules = ['text', 'filter'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->createTestField();
 
-    $this->installConfig(array('filter'));
+    $this->installConfig(['filter']);
 
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:interactionCount'),
-      'datatype_callback' => array(
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:interactionCount'],
+      'datatype_callback' => [
         'callable' => 'Drupal\rdf\Tests\Field\TestDataConverter::convertFoo',
-      ),
-    ))->save();
+      ],
+    ])->save();
 
     // Set up test values.
     $this->testValue = $this->randomMachineName();
@@ -51,7 +51,7 @@ protected function setUp() {
    */
   public function testDefaultFormatter() {
     // Expected value is the output of the datatype callback, not the raw value.
-    $this->assertFormatterRdfa(array('type' => 'text_default'), 'http://schema.org/interactionCount', array('value' => 'foo' . $this->testValue));
+    $this->assertFormatterRdfa(['type' => 'text_default'], 'http://schema.org/interactionCount', ['value' => 'foo' . $this->testValue]);
   }
 
 }
diff --git a/core/modules/rdf/tests/src/Kernel/Field/FieldRdfaTestBase.php b/core/modules/rdf/tests/src/Kernel/Field/FieldRdfaTestBase.php
index 74311850a9b5930670380e7d3bda4f8d62b6fecd..82ea9efdcc025a8855054be1ddeeda18a6e3b50c 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/FieldRdfaTestBase.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/FieldRdfaTestBase.php
@@ -48,7 +48,7 @@ abstract class FieldRdfaTestBase extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf');
+  public static $modules = ['rdf'];
 
   /**
    * @var string
@@ -83,7 +83,7 @@ protected function setUp() {
    *   - datatype: (optional) The datatype of the value (e.g. xsd:dateTime).
    */
   protected function assertFormatterRdfa($formatter, $property, $expected_rdf_value) {
-    $expected_rdf_value += array('type' => 'literal');
+    $expected_rdf_value += ['type' => 'literal'];
 
     // The field formatter will be rendered inside the entity. Set the field
     // formatter in the entity display options before rendering the entity.
@@ -111,12 +111,12 @@ protected function assertFormatterRdfa($formatter, $property, $expected_rdf_valu
    * @param array $field_settings
    *   (optional) An array of field settings.
    */
-  protected function createTestField($field_settings = array()) {
-    FieldStorageConfig::create(array(
+  protected function createTestField($field_settings = []) {
+    FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => 'entity_test',
       'type' => $this->fieldType,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => $this->fieldName,
@@ -135,7 +135,7 @@ protected function createTestField($field_settings = array()) {
    *   The absolute URI.
    */
   protected function getAbsoluteUri($entity) {
-    return $entity->url('canonical', array('absolute' => TRUE));
+    return $entity->url('canonical', ['absolute' => TRUE]);
   }
 
   /**
@@ -172,14 +172,14 @@ protected function parseContent($content) {
    *   format and return values see the SimpleXML documentation,
    *   http://php.net/manual/function.simplexml-element-xpath.php.
    */
-  protected function xpathContent($content, $xpath, array $arguments = array()) {
+  protected function xpathContent($content, $xpath, array $arguments = []) {
     if ($elements = $this->parseContent($content)) {
       $xpath = $this->buildXPathQuery($xpath, $arguments);
       $result = $elements->xpath($xpath);
       // Some combinations of PHP / libxml versions return an empty array
       // instead of the documented FALSE. Forcefully convert any falsish values
       // to an empty array to allow foreach(...) constructions.
-      return $result ? $result : array();
+      return $result ? $result : [];
     }
     else {
       return FALSE;
diff --git a/core/modules/rdf/tests/src/Kernel/Field/LinkFieldRdfaTest.php b/core/modules/rdf/tests/src/Kernel/Field/LinkFieldRdfaTest.php
index d4e1cf0fbb745201e48240e6c329d9ac8aaaeab9..30735e3a8b6fd358a18e473b8893fdd8a29f4107 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/LinkFieldRdfaTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/LinkFieldRdfaTest.php
@@ -19,7 +19,7 @@ class LinkFieldRdfaTest extends FieldRdfaTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('link', 'text');
+  public static $modules = ['link', 'text'];
 
   /**
    * {@inheritdoc}
@@ -31,9 +31,9 @@ protected function setUp() {
 
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:link'),
-    ))->save();
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:link'],
+    ])->save();
 
   }
 
@@ -43,14 +43,14 @@ protected function setUp() {
   public function testAllFormattersExternal() {
     // Set up test values.
     $this->testValue = 'http://test.me/foo/bar/neque/porro/quisquam/est/qui-dolorem?foo/bar/neque/porro/quisquam/est/qui-dolorem';
-    $this->entity = EntityTest::create(array());
+    $this->entity = EntityTest::create([]);
     $this->entity->{$this->fieldName}->uri = $this->testValue;
 
     // Set up the expected result.
-    $expected_rdf = array(
+    $expected_rdf = [
       'value' => $this->testValue,
       'type' => 'uri',
-    );
+    ];
 
     $this->runTestAllFormatters($expected_rdf, 'external');
   }
@@ -61,15 +61,15 @@ public function testAllFormattersExternal() {
   public function testAllFormattersInternal() {
     // Set up test values.
     $this->testValue = 'admin';
-    $this->entity = EntityTest::create(array());
+    $this->entity = EntityTest::create([]);
     $this->entity->{$this->fieldName}->uri = 'internal:/admin';
 
     // Set up the expected result.
     // AssertFormatterRdfa looks for a full path.
-    $expected_rdf = array(
+    $expected_rdf = [
       'value' => $this->uri . '/' . $this->testValue,
       'type' => 'uri',
-    );
+    ];
 
     $this->runTestAllFormatters($expected_rdf, 'internal');
   }
@@ -80,14 +80,14 @@ public function testAllFormattersInternal() {
   public function testAllFormattersFront() {
     // Set up test values.
     $this->testValue = '/';
-    $this->entity = EntityTest::create(array());
+    $this->entity = EntityTest::create([]);
     $this->entity->{$this->fieldName}->uri = 'internal:/';
 
     // Set up the expected result.
-    $expected_rdf = array(
+    $expected_rdf = [
       'value' => $this->uri . '/',
       'type' => 'uri',
-    );
+    ];
 
     $this->runTestAllFormatters($expected_rdf, 'front');
   }
@@ -98,86 +98,86 @@ public function testAllFormattersFront() {
   public function runTestAllFormatters($expected_rdf, $type = NULL) {
 
     // Test the link formatter: trim at 80, no other settings.
-    $formatter = array(
+    $formatter = [
       'type' => 'link',
-      'settings' => array(
+      'settings' => [
         'trim_length' => 80,
         'url_only' => FALSE,
         'url_plain' => FALSE,
         'rel' => '',
         'target' => '',
-      ),
-    );
+      ],
+    ];
     $this->assertFormatterRdfa($formatter, 'http://schema.org/link', $expected_rdf);
 
     // Test the link formatter: trim at 40, nofollow, new window.
-    $formatter = array(
+    $formatter = [
       'type' => 'link',
-      'settings' => array(
+      'settings' => [
         'trim_length' => 40,
         'url_only' => FALSE,
         'url_plain' => FALSE,
         'rel' => 'nofollow',
         'target' => '_blank',
-      ),
-    );
+      ],
+    ];
     $this->assertFormatterRdfa($formatter, 'http://schema.org/link', $expected_rdf);
 
     // Test the link formatter: trim at 40, URL only (not plaintext) nofollow,
     // new window.
-    $formatter = array(
+    $formatter = [
       'type' => 'link',
-      'settings' => array(
+      'settings' => [
         'trim_length' => 40,
         'url_only' => TRUE,
         'url_plain' => FALSE,
         'rel' => 'nofollow',
         'target' => '_blank',
-      ),
-    );
+      ],
+    ];
     $this->assertFormatterRdfa($formatter, 'http://schema.org/link', $expected_rdf);
 
     // Test the link_separate formatter: trim at 40, nofollow, new window.
-    $formatter = array(
+    $formatter = [
       'type' => 'link_separate',
-      'settings' => array(
+      'settings' => [
         'trim_length' => 40,
         'rel' => 'nofollow',
         'target' => '_blank',
-      ),
-    );
+      ],
+    ];
     $this->assertFormatterRdfa($formatter, 'http://schema.org/link', $expected_rdf);
 
     // Change the expected value here to literal. When formatted as plaintext
     // then the RDF is expecting a 'literal' not a 'uri'.
-    $expected_rdf = array(
+    $expected_rdf = [
       'value' => $this->testValue,
       'type' => 'literal',
-    );
+    ];
     // Test the link formatter: trim at 20, url only (as plaintext.)
-    $formatter = array(
+    $formatter = [
       'type' => 'link',
-      'settings' => array(
+      'settings' => [
         'trim_length' => 20,
         'url_only' => TRUE,
         'url_plain' => TRUE,
         'rel' => '0',
         'target' => '0',
-      ),
-    );
+      ],
+    ];
     $this->assertFormatterRdfa($formatter, 'http://schema.org/link', $expected_rdf);
 
     // Test the link formatter: do not trim, url only (as plaintext.)
-    $formatter = array(
+    $formatter = [
       'type' => 'link',
-      'settings' => array(
+      'settings' => [
         'trim_length' => 0,
         'url_only' => TRUE,
         'url_plain' => TRUE,
         'rel' => '0',
         'target' => '0',
-      ),
-    );
+      ],
+    ];
     $this->assertFormatterRdfa($formatter, 'http://schema.org/link', $expected_rdf);
   }
 
diff --git a/core/modules/rdf/tests/src/Kernel/Field/NumberFieldRdfaTest.php b/core/modules/rdf/tests/src/Kernel/Field/NumberFieldRdfaTest.php
index c0652ec8ccd7d3db19da256ce0e6769f5455fad1..5c7d38569050b882c964904e69f921bd91aa0f15 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/NumberFieldRdfaTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/NumberFieldRdfaTest.php
@@ -19,7 +19,7 @@ public function testIntegerFormatter() {
     $testValue = 3;
     $this->createTestField();
     $this->createTestEntity($testValue);
-    $this->assertFormatterRdfa(array('type' => 'number_integer'), 'http://schema.org/baseSalary', array('value' => $testValue));
+    $this->assertFormatterRdfa(['type' => 'number_integer'], 'http://schema.org/baseSalary', ['value' => $testValue]);
 
     // Test that the content attribute is not created.
     $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__items") and @content]');
@@ -33,24 +33,24 @@ public function testIntegerFormatterWithSettings() {
     \Drupal::service('theme_handler')->install(['classy']);
     $this->config('system.theme')->set('default', 'classy')->save();
     $this->fieldType = 'integer';
-    $formatter = array(
+    $formatter = [
       'type' => 'number_integer',
-      'settings' => array(
+      'settings' => [
         'thousand_separator' => '.',
         'prefix_suffix' => TRUE,
-      ),
-    );
+      ],
+    ];
     $testValue = 3333333.33;
-    $field_settings = array(
+    $field_settings = [
       'prefix' => '#',
       'suffix' => ' llamas.',
-    );
+    ];
     $this->createTestField($field_settings);
     $this->createTestEntity($testValue);
-    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $testValue));
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', ['value' => $testValue]);
 
     // Test that the content attribute is created.
-    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__item") and @content=:testValue]', array(':testValue' => $testValue));
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__item") and @content=:testValue]', [':testValue' => $testValue]);
     $this->assertTrue($result);
   }
 
@@ -62,7 +62,7 @@ public function testFloatFormatter() {
     $testValue = 3.33;
     $this->createTestField();
     $this->createTestEntity($testValue);
-    $this->assertFormatterRdfa(array('type' => 'number_unformatted'), 'http://schema.org/baseSalary', array('value' => $testValue));
+    $this->assertFormatterRdfa(['type' => 'number_unformatted'], 'http://schema.org/baseSalary', ['value' => $testValue]);
 
     // Test that the content attribute is not created.
     $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__items") and @content]');
@@ -76,25 +76,25 @@ public function testFloatFormatterWithSettings() {
     \Drupal::service('theme_handler')->install(['classy']);
     $this->config('system.theme')->set('default', 'classy')->save();
     $this->fieldType = 'float';
-    $formatter = array(
+    $formatter = [
       'type' => 'number_decimal',
-      'settings' => array(
+      'settings' => [
         'thousand_separator' => '.',
         'decimal_separator' => ',',
         'prefix_suffix' => TRUE,
-      ),
-    );
+      ],
+    ];
     $testValue = 3333333.33;
-    $field_settings = array(
+    $field_settings = [
       'prefix' => '$',
       'suffix' => ' more.',
-    );
+    ];
     $this->createTestField($field_settings);
     $this->createTestEntity($testValue);
-    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $testValue));
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', ['value' => $testValue]);
 
     // Test that the content attribute is created.
-    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__item") and @content=:testValue]', array(':testValue' => $testValue));
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__item") and @content=:testValue]', [':testValue' => $testValue]);
     $this->assertTrue($result);
   }
 
@@ -103,16 +103,16 @@ public function testFloatFormatterWithSettings() {
    */
   public function testFloatFormatterWithScale() {
     $this->fieldType = 'float';
-    $formatter = array(
+    $formatter = [
       'type' => 'number_decimal',
-      'settings' => array(
+      'settings' => [
         'scale' => 5,
-      ),
-    );
+      ],
+    ];
     $testValue = 3.33;
     $this->createTestField();
     $this->createTestEntity($testValue);
-    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $testValue));
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', ['value' => $testValue]);
 
     // Test that the content attribute is not created.
     $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__items") and @content]');
@@ -126,19 +126,19 @@ public function testFloatFormatterWithScaleExercised() {
     \Drupal::service('theme_handler')->install(['classy']);
     $this->config('system.theme')->set('default', 'classy')->save();
     $this->fieldType = 'float';
-    $formatter = array(
+    $formatter = [
       'type' => 'number_decimal',
-      'settings' => array(
+      'settings' => [
         'scale' => 5,
-      ),
-    );
+      ],
+    ];
     $testValue = 3.1234567;
     $this->createTestField();
     $this->createTestEntity($testValue);
-    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $testValue));
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', ['value' => $testValue]);
 
     // Test that the content attribute is created.
-    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__item") and @content=:testValue]', array(':testValue' => $testValue));
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__item") and @content=:testValue]', [':testValue' => $testValue]);
     $this->assertTrue($result);
   }
 
@@ -150,7 +150,7 @@ public function testDecimalFormatter() {
     $testValue = 3.33;
     $this->createTestField();
     $this->createTestEntity($testValue);
-    $this->assertFormatterRdfa(array('type' => 'number_decimal'), 'http://schema.org/baseSalary', array('value' => $testValue));
+    $this->assertFormatterRdfa(['type' => 'number_decimal'], 'http://schema.org/baseSalary', ['value' => $testValue]);
 
     // Test that the content attribute is not created.
     $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__items") and @content]');
@@ -164,25 +164,25 @@ public function testDecimalFormatterWithSettings() {
     \Drupal::service('theme_handler')->install(['classy']);
     $this->config('system.theme')->set('default', 'classy')->save();
     $this->fieldType = 'decimal';
-    $formatter = array(
+    $formatter = [
       'type' => 'number_decimal',
-      'settings' => array(
+      'settings' => [
         'thousand_separator' => 't',
         'decimal_separator' => '#',
         'prefix_suffix' => TRUE,
-      ),
-    );
+      ],
+    ];
     $testValue = 3333333.33;
-    $field_settings = array(
+    $field_settings = [
       'prefix' => '$',
       'suffix' => ' more.',
-    );
+    ];
     $this->createTestField($field_settings);
     $this->createTestEntity($testValue);
-    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $testValue));
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', ['value' => $testValue]);
 
     // Test that the content attribute is created.
-    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__item") and @content=:testValue]', array(':testValue' => $testValue));
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field__item") and @content=:testValue]', [':testValue' => $testValue]);
     $this->assertTrue($result);
   }
 
@@ -192,12 +192,12 @@ public function testDecimalFormatterWithSettings() {
   protected function createTestEntity($testValue) {
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:baseSalary'),
-    ))->save();
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:baseSalary'],
+    ])->save();
 
     // Set up test entity.
-    $this->entity = EntityTest::create(array());
+    $this->entity = EntityTest::create([]);
     $this->entity->{$this->fieldName}->value = $testValue;
   }
 
diff --git a/core/modules/rdf/tests/src/Kernel/Field/StringFieldRdfaTest.php b/core/modules/rdf/tests/src/Kernel/Field/StringFieldRdfaTest.php
index a0b28e94d1c6486257a6aed5a5fdfb8811fca134..738e40c0372c72d6a59e63c9a4716f87d13ca83b 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/StringFieldRdfaTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/StringFieldRdfaTest.php
@@ -37,9 +37,9 @@ protected function setUp() {
 
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:text'),
-    ))->save();
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:text'],
+    ])->save();
 
     // Set up test entity.
     $this->entity = EntityTest::create();
@@ -52,7 +52,7 @@ protected function setUp() {
    */
   public function testStringFormatters() {
     // Tests the string formatter.
-    $this->assertFormatterRdfa(array('type' => 'string'), 'http://schema.org/text', array('value' => $this->testValue));
+    $this->assertFormatterRdfa(['type' => 'string'], 'http://schema.org/text', ['value' => $this->testValue]);
   }
 
 }
diff --git a/core/modules/rdf/tests/src/Kernel/Field/TelephoneFieldRdfaTest.php b/core/modules/rdf/tests/src/Kernel/Field/TelephoneFieldRdfaTest.php
index 9741256080e96f71223290a5bfb1793f70c0548a..d705b2106d0abf0492dc34ffbd63364cfa11ac71 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/TelephoneFieldRdfaTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/TelephoneFieldRdfaTest.php
@@ -26,7 +26,7 @@ class TelephoneFieldRdfaTest extends FieldRdfaTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('telephone', 'text');
+  public static $modules = ['telephone', 'text'];
 
   protected function setUp() {
     parent::setUp();
@@ -35,13 +35,13 @@ protected function setUp() {
 
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:telephone'),
-    ))->save();
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:telephone'],
+    ])->save();
 
     // Set up test values.
     $this->testValue = '555-555-5555';
-    $this->entity = EntityTest::create(array());
+    $this->entity = EntityTest::create([]);
     $this->entity->{$this->fieldName}->value = $this->testValue;
   }
 
@@ -50,18 +50,18 @@ protected function setUp() {
    */
   public function testAllFormatters() {
     // Tests the plain formatter.
-    $this->assertFormatterRdfa(array('type' => 'string'), 'http://schema.org/telephone', array('value' => $this->testValue));
+    $this->assertFormatterRdfa(['type' => 'string'], 'http://schema.org/telephone', ['value' => $this->testValue]);
     // Tests the telephone link formatter.
-    $this->assertFormatterRdfa(array('type' => 'telephone_link'), 'http://schema.org/telephone', array('value' => 'tel:' . $this->testValue, 'type' => 'uri'));
+    $this->assertFormatterRdfa(['type' => 'telephone_link'], 'http://schema.org/telephone', ['value' => 'tel:' . $this->testValue, 'type' => 'uri']);
 
-    $formatter = array(
+    $formatter = [
       'type' => 'telephone_link',
-      'settings' => array('title' => 'Contact us'),
-    );
-    $expected_rdf_value = array(
+      'settings' => ['title' => 'Contact us'],
+    ];
+    $expected_rdf_value = [
       'value' => 'tel:' . $this->testValue,
       'type' => 'uri',
-    );
+    ];
     // Tests the telephone link formatter with custom title.
     $this->assertFormatterRdfa($formatter, 'http://schema.org/telephone', $expected_rdf_value);
   }
diff --git a/core/modules/rdf/tests/src/Kernel/Field/TextFieldRdfaTest.php b/core/modules/rdf/tests/src/Kernel/Field/TextFieldRdfaTest.php
index cce3499576c76195d7ba3b354a4353a68bfaf1ac..48bc5b8f6bc62334a4b18c70c9df5ee16671f2da 100644
--- a/core/modules/rdf/tests/src/Kernel/Field/TextFieldRdfaTest.php
+++ b/core/modules/rdf/tests/src/Kernel/Field/TextFieldRdfaTest.php
@@ -33,20 +33,20 @@ class TextFieldRdfaTest extends FieldRdfaTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('text', 'filter');
+  public static $modules = ['text', 'filter'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->installConfig(array('filter'));
+    $this->installConfig(['filter']);
 
     $this->createTestField();
 
     // Add the mapping.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping($this->fieldName, array(
-      'properties' => array('schema:text'),
-    ))->save();
+    $mapping->setFieldMapping($this->fieldName, [
+      'properties' => ['schema:text'],
+    ])->save();
 
     // Set up test entity.
     $this->entity = EntityTest::create();
@@ -63,11 +63,11 @@ public function testAllFormatters() {
     $formatted_value = strip_tags($this->entity->{$this->fieldName}->processed);
 
     // Tests the default formatter.
-    $this->assertFormatterRdfa(array('type' => 'text_default'), 'http://schema.org/text', array('value' => $formatted_value));
+    $this->assertFormatterRdfa(['type' => 'text_default'], 'http://schema.org/text', ['value' => $formatted_value]);
     // Tests the summary formatter.
-    $this->assertFormatterRdfa(array('type' => 'text_summary_or_trimmed'), 'http://schema.org/text', array('value' => $formatted_value));
+    $this->assertFormatterRdfa(['type' => 'text_summary_or_trimmed'], 'http://schema.org/text', ['value' => $formatted_value]);
     // Tests the trimmed formatter.
-    $this->assertFormatterRdfa(array('type' => 'text_trimmed'), 'http://schema.org/text', array('value' => $formatted_value));
+    $this->assertFormatterRdfa(['type' => 'text_trimmed'], 'http://schema.org/text', ['value' => $formatted_value]);
   }
 
 }
diff --git a/core/modules/rdf/tests/src/Kernel/RdfaAttributesTest.php b/core/modules/rdf/tests/src/Kernel/RdfaAttributesTest.php
index 42a4dc4486403fc2f3013f116c398aa7e880868d..e67e78b788cd7251c23e4c8b292b2f1280399f6b 100644
--- a/core/modules/rdf/tests/src/Kernel/RdfaAttributesTest.php
+++ b/core/modules/rdf/tests/src/Kernel/RdfaAttributesTest.php
@@ -16,16 +16,16 @@ class RdfaAttributesTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('rdf');
+  public static $modules = ['rdf'];
 
   /**
    * Test attribute creation for mappings which use 'property'.
    */
   function testProperty() {
-    $properties = array('dc:title');
+    $properties = ['dc:title'];
 
-    $mapping = array('properties' => $properties);
-    $expected_attributes = array('property' => $properties);
+    $mapping = ['properties' => $properties];
+    $expected_attributes = ['property' => $properties];
 
     $this->_testAttributes($expected_attributes, $mapping);
   }
@@ -34,17 +34,17 @@ function testProperty() {
    * Test attribute creation for mappings which use 'datatype'.
    */
   function testDatatype() {
-    $properties = array('foo:bar1');
+    $properties = ['foo:bar1'];
     $datatype = 'foo:bar1type';
 
-    $mapping = array(
+    $mapping = [
       'datatype' => $datatype,
       'properties' => $properties,
-    );
-    $expected_attributes = array(
+    ];
+    $expected_attributes = [
       'datatype' => $datatype,
       'property' => $properties,
-    );
+    ];
 
     $this->_testAttributes($expected_attributes, $mapping);
   }
@@ -53,22 +53,22 @@ function testDatatype() {
    * Test attribute creation for mappings which override human-readable content.
    */
   function testDatatypeCallback() {
-    $properties = array('dc:created');
+    $properties = ['dc:created'];
     $datatype = 'xsd:dateTime';
 
     $date = 1252750327;
     $iso_date = date('c', $date);
 
-    $mapping = array(
+    $mapping = [
       'datatype' => $datatype,
       'properties' => $properties,
-      'datatype_callback' => array('callable' => 'date_iso8601'),
-    );
-    $expected_attributes = array(
+      'datatype_callback' => ['callable' => 'date_iso8601'],
+    ];
+    $expected_attributes = [
       'datatype' => $datatype,
       'property' => $properties,
       'content' => $iso_date,
-    );
+    ];
 
     $this->_testAttributes($expected_attributes, $mapping, $date);
   }
@@ -78,22 +78,22 @@ function testDatatypeCallback() {
    * Test attribute creation for mappings which use data converters.
    */
   function testDatatypeCallbackWithConverter() {
-    $properties = array('schema:interactionCount');
+    $properties = ['schema:interactionCount'];
 
     $data = "23";
     $content = "UserComments:23";
 
-    $mapping = array(
+    $mapping = [
       'properties' => $properties,
-      'datatype_callback' => array(
+      'datatype_callback' => [
         'callable' => 'Drupal\rdf\SchemaOrgDataConverter::interactionCount',
-        'arguments' => array('interaction_type' => 'UserComments'),
-      ),
-    );
-    $expected_attributes = array(
+        'arguments' => ['interaction_type' => 'UserComments'],
+      ],
+    ];
+    $expected_attributes = [
       'property' => $properties,
       'content' => $content,
-    );
+    ];
 
     $this->_testAttributes($expected_attributes, $mapping, $data);
   }
@@ -102,13 +102,13 @@ function testDatatypeCallbackWithConverter() {
    * Test attribute creation for mappings which use 'rel'.
    */
   function testRel() {
-    $properties = array('sioc:has_creator', 'dc:creator');
+    $properties = ['sioc:has_creator', 'dc:creator'];
 
-    $mapping = array(
+    $mapping = [
       'properties' => $properties,
       'mapping_type' => 'rel',
-    );
-    $expected_attributes = array('rel' => $properties);
+    ];
+    $expected_attributes = ['rel' => $properties];
 
     $this->_testAttributes($expected_attributes, $mapping);
   }
diff --git a/core/modules/rdf/tests/src/Unit/RdfMappingConfigEntityUnitTest.php b/core/modules/rdf/tests/src/Unit/RdfMappingConfigEntityUnitTest.php
index d245a8170888749bf8f7bb6a00b12083935e8b4c..5908ee72621ff4d1c98247ac4ba2c9a42d0a1f98 100644
--- a/core/modules/rdf/tests/src/Unit/RdfMappingConfigEntityUnitTest.php
+++ b/core/modules/rdf/tests/src/Unit/RdfMappingConfigEntityUnitTest.php
@@ -72,7 +72,7 @@ public function testCalculateDependencies() {
     $target_entity_type->expects($this->any())
       ->method('getProvider')
       ->will($this->returnValue('test_module'));
-    $values = array('targetEntityType' => $target_entity_type_id);
+    $values = ['targetEntityType' => $target_entity_type_id];
     $target_entity_type->expects($this->any())
       ->method('getBundleEntityType')
       ->will($this->returnValue(NULL));
@@ -102,11 +102,11 @@ public function testCalculateDependenciesWithEntityBundle() {
       ->method('getProvider')
       ->will($this->returnValue('test_module'));
     $bundle_id = $this->randomMachineName(10);
-    $values = array('targetEntityType' => $target_entity_type_id , 'bundle' => $bundle_id);
+    $values = ['targetEntityType' => $target_entity_type_id , 'bundle' => $bundle_id];
 
     $target_entity_type->expects($this->any())
       ->method('getBundleConfigDependency')
-      ->will($this->returnValue(array('type' => 'config', 'name' => 'test_module.type.' . $bundle_id)));
+      ->will($this->returnValue(['type' => 'config', 'name' => 'test_module.type.' . $bundle_id]));
 
     $this->entityManager->expects($this->at(0))
       ->method('getDefinition')
diff --git a/core/modules/responsive_image/responsive_image.module b/core/modules/responsive_image/responsive_image.module
index 359368d5b0c701a741e042a06e44735f3ccede7f..4388e896354b1a236aad76603febbc458d5b1930 100644
--- a/core/modules/responsive_image/responsive_image.module
+++ b/core/modules/responsive_image/responsive_image.module
@@ -40,25 +40,25 @@ function responsive_image_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.responsive_image':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Responsive Image module provides an image formatter that allows browsers to select which image file to display based on media queries or which image file types the browser supports, using the HTML 5 picture and source elements and/or the sizes, srcset and type attributes. For more information, see the <a href=":responsive_image">online documentation for the Responsive Image module</a>.', array( ':responsive_image' => 'https://www.drupal.org/documentation/modules/responsive_image')) . '</p>';
+      $output .= '<p>' . t('The Responsive Image module provides an image formatter that allows browsers to select which image file to display based on media queries or which image file types the browser supports, using the HTML 5 picture and source elements and/or the sizes, srcset and type attributes. For more information, see the <a href=":responsive_image">online documentation for the Responsive Image module</a>.', [ ':responsive_image' => 'https://www.drupal.org/documentation/modules/responsive_image']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Defining responsive image styles') . '</dt>';
-      $output .= '<dd>' . t('By creating responsive image styles you define which options the browser has in selecting which image file to display. In most cases this means providing different image sizes based on the viewport size. On the <a href=":responsive_image_style">Responsive image styles</a> page, click <em>Add responsive image style</em> to create a new style. First choose a label, a fallback image style and a breakpoint group and click Save.', array(':responsive_image_style' => \Drupal::url('entity.responsive_image_style.collection'))) . '</dd>';
+      $output .= '<dd>' . t('By creating responsive image styles you define which options the browser has in selecting which image file to display. In most cases this means providing different image sizes based on the viewport size. On the <a href=":responsive_image_style">Responsive image styles</a> page, click <em>Add responsive image style</em> to create a new style. First choose a label, a fallback image style and a breakpoint group and click Save.', [':responsive_image_style' => \Drupal::url('entity.responsive_image_style.collection')]) . '</dd>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Fallback image style') . '</dt>';
       $output .= '<dd>' . t('The fallback image style is typically the smallest size image you expect to appear in this space. Because the responsive images module uses the Picturefill library so that responsive images can work in older browsers, the fallback image should only appear on a site if an error occurs.') . '</dd>';
       $output .= '<dt>' . t('Breakpoint groups: viewport sizing vs art direction') . '</dt>';
-      $output .= '<dd>' . t('The breakpoint group typically only needs a single breakpoint with an empty media query in order to do <em>viewport sizing.</em> Multiple breakpoints are used for changing the crop or aspect ratio of images at different viewport sizes, which is often referred to as <em>art direction.</em> Once you select a breakpoint group, you can choose which breakpoints to use for the responsive image style. By default, the option <em>do not use this breakpoint</em> is selected for each breakpoint. See the <a href=":breakpoint_help">help page of the Breakpoint module</a> for more information.', array(':breakpoint_help' => \Drupal::url('help.page', array('name' => 'breakpoint')))) . '</dd>';
+      $output .= '<dd>' . t('The breakpoint group typically only needs a single breakpoint with an empty media query in order to do <em>viewport sizing.</em> Multiple breakpoints are used for changing the crop or aspect ratio of images at different viewport sizes, which is often referred to as <em>art direction.</em> Once you select a breakpoint group, you can choose which breakpoints to use for the responsive image style. By default, the option <em>do not use this breakpoint</em> is selected for each breakpoint. See the <a href=":breakpoint_help">help page of the Breakpoint module</a> for more information.', [':breakpoint_help' => \Drupal::url('help.page', ['name' => 'breakpoint'])]) . '</dd>';
       $output .= '<dt>' . t('Breakpoint settings: sizes vs image styles') . '</dt>';
       $output .= '<dd>' . t('While you have the option to provide only one image style per breakpoint, the sizes option allows you to provide more options to browsers as to which image file it can display, even when using multiple breakpoints for art direction. Breakpoints are defined in the configuration files of the theme.') . '</dd>';
       $output .= '<dt>' . t('Sizes field') . '</dt>';
       $output .= '<dd>' . t('Once the sizes option is selected, you can let the browser know the size of this image in relation to the site layout, using the <em>Sizes</em> field. For a hero image that always fills the entire screen, you could simply enter 100vw, which means 100% of the viewport width. For an image that fills 90% of the screen for small viewports, but only fills 40% of the screen when the viewport is larger than 40em (typically 640px), you could enter "(min-width: 40em) 40vw, 90vw" in the Sizes field. The last item in the comma-separated list is the smallest viewport size: other items in the comma-separated list should have a media condition paired with an image width. <em>Media conditions</em> are similar to a media query, often a min-width paired with a viewport width using em or px units: e.g. (min-width: 640px) or (min-width: 40em). This is paired with the <em>image width</em> at that viewport size using px, em or vw units. The vw unit is viewport width and is used instead of a percentage because the percentage always refers to the width of the entire viewport.') . '</dd>';
       $output .= '<dt>' . t('Image styles for sizes') . '</dt>';
-      $output .= '<dd>' . t('Below the Sizes field you can choose multiple image styles so the browser can choose the best image file size to fill the space defined in the Sizes field. Typically you will want to use image styles that resize your image to have options that range from the smallest px width possible for the space the image will appear in to the largest px width possible, with a variety of widths in between. You may want to provide image styles with widths that are 1.5x to 2x the space available in the layout to account for high resolution screens. Image styles can be defined on the <a href=":image_styles">Image styles page</a> that is provided by the <a href=":image_help">Image module</a>.', array(':image_styles' => \Drupal::url('entity.image_style.collection'), ':image_help' => \Drupal::url('help.page', array('name' => 'image')))) . '</dd>';
+      $output .= '<dd>' . t('Below the Sizes field you can choose multiple image styles so the browser can choose the best image file size to fill the space defined in the Sizes field. Typically you will want to use image styles that resize your image to have options that range from the smallest px width possible for the space the image will appear in to the largest px width possible, with a variety of widths in between. You may want to provide image styles with widths that are 1.5x to 2x the space available in the layout to account for high resolution screens. Image styles can be defined on the <a href=":image_styles">Image styles page</a> that is provided by the <a href=":image_help">Image module</a>.', [':image_styles' => \Drupal::url('entity.image_style.collection'), ':image_help' => \Drupal::url('help.page', ['name' => 'image'])]) . '</dd>';
       $output .= '</dl></dd>';
       $output .= '<dt>' . t('Using responsive image styles in Image fields') . '</dt>';
-      $output .= '<dd>' . t('After defining responsive image styles, you can use them in the display settings for your Image fields, so that the site displays responsive images using the HTML5 picture tag. Open the Manage display page for the entity type (content type, taxonomy vocabulary, etc.) that the Image field is attached to. Choose the format <em>Responsive image</em>, click the Edit icon, and select one of the responsive image styles that you have created. For general information on how to manage fields and their display see the <a href=":field_ui">Field UI module help page</a>. For background information about entities and fields see the <a href=":field_help">Field module help page</a>.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':field_help' => \Drupal::url('help.page', array('name' => 'field')))) . '</dd>';
+      $output .= '<dd>' . t('After defining responsive image styles, you can use them in the display settings for your Image fields, so that the site displays responsive images using the HTML5 picture tag. Open the Manage display page for the entity type (content type, taxonomy vocabulary, etc.) that the Image field is attached to. Choose the format <em>Responsive image</em>, click the Edit icon, and select one of the responsive image styles that you have created. For general information on how to manage fields and their display see the <a href=":field_ui">Field UI module help page</a>. For background information about entities and fields see the <a href=":field_help">Field module help page</a>.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':field_help' => \Drupal::url('help.page', ['name' => 'field'])]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -71,25 +71,25 @@ function responsive_image_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function responsive_image_theme() {
-  return array(
-    'responsive_image' => array(
-      'variables' => array(
+  return [
+    'responsive_image' => [
+      'variables' => [
         'uri' => NULL,
-        'attributes' => array(),
-        'responsive_image_style_id' => array(),
+        'attributes' => [],
+        'responsive_image_style_id' => [],
         'height' => NULL,
         'width' => NULL,
-      ),
-    ),
-    'responsive_image_formatter' => array(
-      'variables' => array(
+      ],
+    ],
+    'responsive_image_formatter' => [
+      'variables' => [
         'item' => NULL,
         'item_attributes' => NULL,
         'url' => NULL,
         'responsive_image_style_id' => NULL,
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
 
 /**
@@ -110,18 +110,18 @@ function template_preprocess_responsive_image_formatter(&$variables) {
   // provided in the responsive image formatter.
   $responsive_image_style = ResponsiveImageStyle::load($variables['responsive_image_style_id']);
   if ($responsive_image_style) {
-    $variables['responsive_image'] = array(
+    $variables['responsive_image'] = [
       '#type' => 'responsive_image',
       '#responsive_image_style_id' => $variables['responsive_image_style_id'],
-    );
+    ];
   }
   else {
-    $variables['responsive_image'] = array(
+    $variables['responsive_image'] = [
       '#theme' => 'image',
-    );
+    ];
   }
   $item = $variables['item'];
-  $attributes = array();
+  $attributes = [];
   // Do not output an empty 'title' attribute.
   if (Unicode::strlen($item->title) != 0) {
     $attributes['title'] = $item->title;
@@ -138,7 +138,7 @@ function template_preprocess_responsive_image_formatter(&$variables) {
     $variables['responsive_image']['#uri'] = $item->uri;
   }
 
-  foreach (array('width', 'height') as $key) {
+  foreach (['width', 'height'] as $key) {
     $variables['responsive_image']["#$key"] = $item->$key;
   }
   $variables['responsive_image']['#attributes'] = $attributes;
@@ -201,10 +201,10 @@ function template_preprocess_responsive_image(&$variables) {
         $variables['attributes'][$attribute] = $value;
       }
     }
-    $variables['img_element'] = array(
+    $variables['img_element'] = [
       '#theme' => 'image',
       '#uri' => _responsive_image_image_style_url($responsive_image_style->getFallbackImageStyle(), $variables['uri']),
-    );
+    ];
   }
   else {
     $variables['output_image_tag'] = FALSE;
@@ -212,10 +212,10 @@ function template_preprocess_responsive_image(&$variables) {
     // double downloads in browsers that don't support the picture tag (might,
     // because when picturefill kicks in, it cancels the download and triggers
     // the download for the correct image).
-    $variables['img_element'] = array(
+    $variables['img_element'] = [
       '#theme' => 'image',
       '#uri' => _responsive_image_image_style_url($responsive_image_style->getFallbackImageStyle(), $variables['uri']),
-    );
+    ];
   }
 
   if (isset($variables['attributes'])) {
@@ -405,9 +405,9 @@ function _responsive_image_build_source_attributes(array $variables, BreakpointI
     $height = $variables['height'];
   }
   $extension = pathinfo($variables['uri'], PATHINFO_EXTENSION);
-  $sizes = array();
-  $srcset = array();
-  $derivative_mime_types = array();
+  $sizes = [];
+  $srcset = [];
+  $derivative_mime_types = [];
   foreach ($multipliers as $multiplier => $image_style_mapping) {
     switch ($image_style_mapping['image_mapping_type']) {
       // Create a <source> tag with the 'sizes' attribute.
@@ -415,7 +415,7 @@ function _responsive_image_build_source_attributes(array $variables, BreakpointI
         // Loop through the image styles for this breakpoint and multiplier.
         foreach ($image_style_mapping['image_mapping']['sizes_image_styles'] as $image_style_name) {
           // Get the dimensions.
-          $dimensions = responsive_image_get_image_dimensions($image_style_name, array('width' => $width, 'height' => $height), $variables['uri']);
+          $dimensions = responsive_image_get_image_dimensions($image_style_name, ['width' => $width, 'height' => $height], $variables['uri']);
           // Get MIME type.
           $derivative_mime_type = responsive_image_get_mime_type($image_style_name, $extension);
           $derivative_mime_types[] = $derivative_mime_type;
@@ -451,9 +451,9 @@ function _responsive_image_build_source_attributes(array $variables, BreakpointI
   }
   // Sort the srcset from small to large image width or multiplier.
   ksort($srcset);
-  $source_attributes = new Attribute(array(
+  $source_attributes = new Attribute([
     'srcset' => implode(', ', array_unique($srcset)),
-  ));
+  ]);
   $media_query = trim($breakpoint->getMediaQuery());
   if (!empty($media_query)) {
     $source_attributes->setAttribute('media', $media_query);
@@ -486,10 +486,10 @@ function _responsive_image_build_source_attributes(array $variables, BreakpointI
 function responsive_image_get_image_dimensions($image_style_name, array $dimensions, $uri) {
   // Determine the dimensions of the styled image.
   if ($image_style_name == RESPONSIVE_IMAGE_EMPTY_IMAGE) {
-    $dimensions = array(
+    $dimensions = [
       'width' => 1,
       'height' => 1,
-    );
+    ];
   }
   elseif ($entity = ImageStyle::load($image_style_name)) {
     $entity->transformDimensions($dimensions, $uri);
diff --git a/core/modules/responsive_image/src/Entity/ResponsiveImageStyle.php b/core/modules/responsive_image/src/Entity/ResponsiveImageStyle.php
index fabfc60db4cdc8480b559140cc838e3be1034653..5ad9d9530b648c499c03608ccfba6089dd703d42 100644
--- a/core/modules/responsive_image/src/Entity/ResponsiveImageStyle.php
+++ b/core/modules/responsive_image/src/Entity/ResponsiveImageStyle.php
@@ -68,7 +68,7 @@ class ResponsiveImageStyle extends ConfigEntityBase implements ResponsiveImageSt
    *
    * @var array
    */
-  protected $image_style_mappings = array();
+  protected $image_style_mappings = [];
 
   /**
    * @var array
@@ -103,18 +103,18 @@ public function addImageStyleMapping($breakpoint_id, $multiplier, array $image_s
     // If there is an existing mapping, overwrite it.
     foreach ($this->image_style_mappings as &$mapping) {
       if ($mapping['breakpoint_id'] === $breakpoint_id && $mapping['multiplier'] === $multiplier) {
-        $mapping = array(
+        $mapping = [
           'breakpoint_id' => $breakpoint_id,
           'multiplier' => $multiplier,
-        ) + $image_style_mapping;
+        ] + $image_style_mapping;
         $this->keyedImageStyleMappings = NULL;
         return $this;
       }
     }
-    $this->image_style_mappings[] = array(
+    $this->image_style_mappings[] = [
       'breakpoint_id' => $breakpoint_id,
       'multiplier' => $multiplier,
-    ) + $image_style_mapping;
+    ] + $image_style_mapping;
     $this->keyedImageStyleMappings = NULL;
     return $this;
   }
@@ -132,7 +132,7 @@ public function hasImageStyleMappings() {
    */
   public function getKeyedImageStyleMappings() {
     if (!$this->keyedImageStyleMappings) {
-      $this->keyedImageStyleMappings = array();
+      $this->keyedImageStyleMappings = [];
       foreach ($this->image_style_mappings as $mapping) {
         if (!static::isEmptyImageStyleMapping($mapping)) {
           $this->keyedImageStyleMappings[$mapping['breakpoint_id']][$mapping['multiplier']] = $mapping;
@@ -188,7 +188,7 @@ public function getFallbackImageStyle() {
    * {@inheritdoc}
    */
   public function removeImageStyleMappings() {
-    $this->image_style_mappings = array();
+    $this->image_style_mappings = [];
     $this->keyedImageStyleMappings = NULL;
     return $this;
   }
diff --git a/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php b/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php
index 3ec1a19987245502d9892a004cccf7eb86a3f024..6d9b7fa2fa3283dc8226c57d06bca681a81864b4 100644
--- a/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php
+++ b/core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php
@@ -115,17 +115,17 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'responsive_image_style' => '',
       'image_link' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $responsive_image_options = array();
+    $responsive_image_options = [];
     $responsive_image_styles = $this->responsiveImageStyleStorage->loadMultiple();
     if ($responsive_image_styles && !empty($responsive_image_styles)) {
       foreach ($responsive_image_styles as $machine_name => $responsive_image_style) {
@@ -135,29 +135,29 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
       }
     }
 
-    $elements['responsive_image_style'] = array(
+    $elements['responsive_image_style'] = [
       '#title' => t('Responsive image style'),
       '#type' => 'select',
       '#default_value' => $this->getSetting('responsive_image_style'),
       '#required' => TRUE,
       '#options' => $responsive_image_options,
-      '#description' => array(
+      '#description' => [
         '#markup' => $this->linkGenerator->generate($this->t('Configure Responsive Image Styles'), new Url('entity.responsive_image_style.collection')),
         '#access' => $this->currentUser->hasPermission('administer responsive image styles'),
-        ),
-    );
+        ],
+    ];
 
-    $link_types = array(
+    $link_types = [
       'content' => t('Content'),
       'file' => t('File'),
-    );
-    $elements['image_link'] = array(
+    ];
+    $elements['image_link'] = [
       '#title' => t('Link image to'),
       '#type' => 'select',
       '#default_value' => $this->getSetting('image_link'),
       '#empty_option' => t('Nothing'),
       '#options' => $link_types,
-    );
+    ];
 
     return $elements;
   }
@@ -166,16 +166,16 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $responsive_image_style = $this->responsiveImageStyleStorage->load($this->getSetting('responsive_image_style'));
     if ($responsive_image_style) {
-      $summary[] = t('Responsive image style: @responsive_image_style', array('@responsive_image_style' => $responsive_image_style->label()));
+      $summary[] = t('Responsive image style: @responsive_image_style', ['@responsive_image_style' => $responsive_image_style->label()]);
 
-      $link_types = array(
+      $link_types = [
         'content' => t('Linked to content'),
         'file' => t('Linked to file'),
-      );
+      ];
       // Display this setting only if image is linked.
       if (isset($link_types[$this->getSetting('image_link')])) {
         $summary[] = $link_types[$this->getSetting('image_link')];
@@ -192,7 +192,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
     $files = $this->getEntitiesToView($items, $langcode);
 
     // Early opt-out if the field is empty.
@@ -214,7 +214,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
 
     // Collect cache tags to be added for each item in the field.
     $responsive_image_style = $this->responsiveImageStyleStorage->load($this->getSetting('responsive_image_style'));
-    $image_styles_to_load = array();
+    $image_styles_to_load = [];
     $cache_tags = [];
     if ($responsive_image_style) {
       $cache_tags = Cache::mergeTags($cache_tags, $responsive_image_style->getCacheTags());
@@ -237,16 +237,16 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
       $item_attributes = $item->_attributes;
       unset($item->_attributes);
 
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#theme' => 'responsive_image_formatter',
         '#item' => $item,
         '#item_attributes' => $item_attributes,
         '#responsive_image_style_id' => $responsive_image_style ? $responsive_image_style->id() : '',
         '#url' => $url,
-        '#cache' => array(
+        '#cache' => [
           'tags' => $cache_tags,
-        ),
-      );
+        ],
+      ];
     }
     return $elements;
   }
diff --git a/core/modules/responsive_image/src/ResponsiveImageStyleForm.php b/core/modules/responsive_image/src/ResponsiveImageStyleForm.php
index 3e5b051ade91ea2567ac3eab1d943e48f299d93a..8ad0e6a6c872db725cd1a1584acc7d9b64f67824 100644
--- a/core/modules/responsive_image/src/ResponsiveImageStyleForm.php
+++ b/core/modules/responsive_image/src/ResponsiveImageStyleForm.php
@@ -51,32 +51,32 @@ public function __construct(BreakpointManagerInterface $breakpoint_manager) {
    */
   public function form(array $form, FormStateInterface $form_state) {
     if ($this->operation == 'duplicate') {
-      $form['#title'] = $this->t('<em>Duplicate responsive image style</em> @label', array('@label' => $this->entity->label()));
+      $form['#title'] = $this->t('<em>Duplicate responsive image style</em> @label', ['@label' => $this->entity->label()]);
       $this->entity = $this->entity->createDuplicate();
     }
     if ($this->operation == 'edit') {
-      $form['#title'] = $this->t('<em>Edit responsive image style</em> @label', array('@label' => $this->entity->label()));
+      $form['#title'] = $this->t('<em>Edit responsive image style</em> @label', ['@label' => $this->entity->label()]);
     }
 
     /** @var \Drupal\responsive_image\ResponsiveImageStyleInterface $responsive_image_style */
     $responsive_image_style = $this->entity;
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label'),
       '#maxlength' => 255,
       '#default_value' => $responsive_image_style->label(),
       '#description' => $this->t("Example: 'Hero image' or 'Author image'."),
       '#required' => TRUE,
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
       '#default_value' => $responsive_image_style->id(),
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => '\Drupal\responsive_image\Entity\ResponsiveImageStyle::load',
-        'source' => array('label'),
-      ),
+        'source' => ['label'],
+      ],
       '#disabled' => (bool) $responsive_image_style->id() && $this->operation != 'duplicate',
-    );
+    ];
 
     $image_styles = image_style_options(TRUE);
     $image_styles[RESPONSIVE_IMAGE_ORIGINAL_IMAGE] = $this->t('- None (original image) -');
@@ -89,25 +89,25 @@ public function form(array $form, FormStateInterface $form_state) {
       $description = $this->t('Select a breakpoint group from the installed themes and modules.');
     }
 
-    $form['breakpoint_group'] = array(
+    $form['breakpoint_group'] = [
       '#type' => 'select',
       '#title' => $this->t('Breakpoint group'),
       '#default_value' => $responsive_image_style->getBreakpointGroup() ?: 'responsive_image',
       '#options' => $this->breakpointManager->getGroups(),
       '#required' => TRUE,
       '#description' => $description,
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => '::breakpointMappingFormAjax',
         'wrapper' => 'responsive-image-style-breakpoints-wrapper',
-      ),
-    );
+      ],
+    ];
 
-    $form['keyed_styles'] = array(
+    $form['keyed_styles'] = [
       '#type' => 'container',
-      '#attributes' => array(
+      '#attributes' => [
         'id' => 'responsive-image-style-breakpoints-wrapper',
-      ),
-    );
+      ],
+    ];
 
     // By default, breakpoints are ordered from smallest weight to largest:
     // the smallest weight is expected to have the smallest breakpoint width,
@@ -119,69 +119,69 @@ public function form(array $form, FormStateInterface $form_state) {
     foreach ($breakpoints as $breakpoint_id => $breakpoint) {
       foreach ($breakpoint->getMultipliers() as $multiplier) {
         $label = $multiplier . ' ' . $breakpoint->getLabel() . ' [' . $breakpoint->getMediaQuery() . ']';
-        $form['keyed_styles'][$breakpoint_id][$multiplier] = array(
+        $form['keyed_styles'][$breakpoint_id][$multiplier] = [
           '#type' => 'details',
           '#title' => $label,
-        );
+        ];
         $image_style_mapping = $responsive_image_style->getImageStyleMapping($breakpoint_id, $multiplier);
         if (\Drupal::moduleHandler()->moduleExists('help')) {
-          $description = $this->t('See the <a href=":responsive_image_help">Responsive Image help page</a> for information on the sizes attribute.', array(':responsive_image_help' => \Drupal::url('help.page', array('name' => 'responsive_image'))));
+          $description = $this->t('See the <a href=":responsive_image_help">Responsive Image help page</a> for information on the sizes attribute.', [':responsive_image_help' => \Drupal::url('help.page', ['name' => 'responsive_image'])]);
         }
         else {
           $description = $this->t('Enable the Help module for more information on the sizes attribute.');
         }
-        $form['keyed_styles'][$breakpoint_id][$multiplier]['image_mapping_type'] = array(
+        $form['keyed_styles'][$breakpoint_id][$multiplier]['image_mapping_type'] = [
           '#title' => $this->t('Type'),
           '#type' => 'radios',
-          '#options' => array(
+          '#options' => [
             'sizes' => $this->t('Select multiple image styles and use the sizes attribute.'),
             'image_style' => $this->t('Select a single image style.'),
             '_none' => $this->t('Do not use this breakpoint.'),
-          ),
+          ],
           '#default_value' => isset($image_style_mapping['image_mapping_type']) ? $image_style_mapping['image_mapping_type'] : '_none',
           '#description' => $description,
-        );
-        $form['keyed_styles'][$breakpoint_id][$multiplier]['image_style'] = array(
+        ];
+        $form['keyed_styles'][$breakpoint_id][$multiplier]['image_style'] = [
           '#type' => 'select',
           '#title' => $this->t('Image style'),
           '#options' => $image_styles,
           '#default_value' => isset($image_style_mapping['image_mapping']) && is_string($image_style_mapping['image_mapping']) ? $image_style_mapping['image_mapping'] : '',
           '#description' => $this->t('Select an image style for this breakpoint.'),
-          '#states' => array(
-            'visible' => array(
-              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => array('value' => 'image_style'),
-            ),
-          ),
-        );
-        $form['keyed_styles'][$breakpoint_id][$multiplier]['sizes'] = array(
+          '#states' => [
+            'visible' => [
+              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => ['value' => 'image_style'],
+            ],
+          ],
+        ];
+        $form['keyed_styles'][$breakpoint_id][$multiplier]['sizes'] = [
           '#type' => 'textfield',
           '#title' => $this->t('Sizes'),
           '#default_value' => isset($image_style_mapping['image_mapping']['sizes']) ? $image_style_mapping['image_mapping']['sizes'] : '100vw',
           '#description' => $this->t('Enter the value for the sizes attribute, for example: %example_sizes.', ['%example_sizes' => '(min-width:700px) 700px, 100vw']),
-          '#states' => array(
-            'visible' => array(
-              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => array('value' => 'sizes'),
-            ),
-            'required' => array(
-              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => array('value' => 'sizes'),
-            ),
-          ),
-        );
-        $form['keyed_styles'][$breakpoint_id][$multiplier]['sizes_image_styles'] = array(
+          '#states' => [
+            'visible' => [
+              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => ['value' => 'sizes'],
+            ],
+            'required' => [
+              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => ['value' => 'sizes'],
+            ],
+          ],
+        ];
+        $form['keyed_styles'][$breakpoint_id][$multiplier]['sizes_image_styles'] = [
           '#title' => $this->t('Image styles'),
           '#type' => 'checkboxes',
-          '#options' => array_diff_key($image_styles, array('' => '')),
+          '#options' => array_diff_key($image_styles, ['' => '']),
           '#description' => $this->t('Select image styles with widths that range from the smallest amount of space this image will take up in the layout to the largest, bearing in mind that high resolution screens will need images 1.5x to 2x larger.'),
-          '#default_value' => isset($image_style_mapping['image_mapping']['sizes_image_styles']) ? $image_style_mapping['image_mapping']['sizes_image_styles'] : array(),
-          '#states' => array(
-            'visible' => array(
-              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => array('value' => 'sizes'),
-            ),
-            'required' => array(
-              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => array('value' => 'sizes'),
-            ),
-          ),
-        );
+          '#default_value' => isset($image_style_mapping['image_mapping']['sizes_image_styles']) ? $image_style_mapping['image_mapping']['sizes_image_styles'] : [],
+          '#states' => [
+            'visible' => [
+              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => ['value' => 'sizes'],
+            ],
+            'required' => [
+              ':input[name="keyed_styles[' . $breakpoint_id . '][' . $multiplier . '][image_mapping_type]"]' => ['value' => 'sizes'],
+            ],
+          ],
+        ];
 
         // Expand the details if "do not use this breakpoint" was not selected.
         if ($form['keyed_styles'][$breakpoint_id][$multiplier]['image_mapping_type']['#default_value'] != '_none') {
@@ -190,14 +190,14 @@ public function form(array $form, FormStateInterface $form_state) {
       }
     }
 
-    $form['fallback_image_style'] = array(
+    $form['fallback_image_style'] = [
       '#title' => $this->t('Fallback image style'),
       '#type' => 'select',
       '#default_value' => $responsive_image_style->getFallbackImageStyle(),
       '#options' => $image_styles,
       '#required' => TRUE,
       '#description' => t('Select the smallest image style you expect to appear in this space. The fallback image style should only appear on the site if an error occurs.'),
-    );
+    ];
 
     $form['#tree'] = TRUE;
 
@@ -252,20 +252,20 @@ public function save(array $form, FormStateInterface $form_state) {
       foreach ($form_state->getValue('keyed_styles') as $breakpoint_id => $multipliers) {
         foreach ($multipliers as $multiplier => $image_style_mapping) {
           if ($image_style_mapping['image_mapping_type'] === 'sizes') {
-            $mapping = array(
+            $mapping = [
               'image_mapping_type' => 'sizes',
-              'image_mapping' => array(
+              'image_mapping' => [
                 'sizes' => $image_style_mapping['sizes'],
                 'sizes_image_styles' => array_keys(array_filter($image_style_mapping['sizes_image_styles'])),
-              )
-            );
+              ]
+            ];
             $responsive_image_style->addImageStyleMapping($breakpoint_id, $multiplier, $mapping);
           }
           elseif ($image_style_mapping['image_mapping_type'] === 'image_style') {
-            $mapping = array(
+            $mapping = [
               'image_mapping_type' => 'image_style',
               'image_mapping' => $image_style_mapping['image_style'],
-            );
+            ];
             $responsive_image_style->addImageStyleMapping($breakpoint_id, $multiplier, $mapping);
           }
         }
@@ -273,15 +273,15 @@ public function save(array $form, FormStateInterface $form_state) {
     }
     $responsive_image_style->save();
 
-    $this->logger('responsive_image')->notice('Responsive image style @label saved.', array('@label' => $responsive_image_style->label()));
-    drupal_set_message($this->t('Responsive image style %label saved.', array('%label' => $responsive_image_style->label())));
+    $this->logger('responsive_image')->notice('Responsive image style @label saved.', ['@label' => $responsive_image_style->label()]);
+    drupal_set_message($this->t('Responsive image style %label saved.', ['%label' => $responsive_image_style->label()]));
 
     // Redirect to edit form after creating a new responsive image style or
     // after selecting another breakpoint group.
     if (!$responsive_image_style->hasImageStyleMappings()) {
       $form_state->setRedirect(
         'entity.responsive_image_style.edit_form',
-        array('responsive_image_style' => $responsive_image_style->id())
+        ['responsive_image_style' => $responsive_image_style->id()]
       );
     }
     else {
diff --git a/core/modules/responsive_image/src/ResponsiveImageStyleListBuilder.php b/core/modules/responsive_image/src/ResponsiveImageStyleListBuilder.php
index 648a171bf30d033a9f8c2d4b3017d9621349c323..1b4ded009d77beed576ba639c74d325af3a0db3c 100644
--- a/core/modules/responsive_image/src/ResponsiveImageStyleListBuilder.php
+++ b/core/modules/responsive_image/src/ResponsiveImageStyleListBuilder.php
@@ -33,11 +33,11 @@ public function buildRow(EntityInterface $entity) {
    */
   public function getDefaultOperations(EntityInterface $entity) {
     $operations = parent::getDefaultOperations($entity);
-    $operations['duplicate'] = array(
+    $operations['duplicate'] = [
       'title' => t('Duplicate'),
       'weight' => 15,
       'url' => $entity->urlInfo('duplicate-form'),
-    );
+    ];
     return $operations;
   }
 
diff --git a/core/modules/responsive_image/src/Tests/ResponsiveImageAdminUITest.php b/core/modules/responsive_image/src/Tests/ResponsiveImageAdminUITest.php
index 8f8b5058e959064923728290792741c57fa3ad46..0439771b192d9ec2e220d4735deed1c895be951d 100644
--- a/core/modules/responsive_image/src/Tests/ResponsiveImageAdminUITest.php
+++ b/core/modules/responsive_image/src/Tests/ResponsiveImageAdminUITest.php
@@ -16,7 +16,7 @@ class ResponsiveImageAdminUITest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('responsive_image', 'responsive_image_test_module');
+  public static $modules = ['responsive_image', 'responsive_image_test_module'];
 
   /**
    * Drupal\simpletest\WebTestBase\setUp().
@@ -43,12 +43,12 @@ public function testResponsiveImageAdmin() {
     $this->assertFieldByName('breakpoint_group', 'responsive_image');
 
     // Create a new group.
-    $edit = array(
+    $edit = [
       'label' => 'Style One',
       'id' => 'style_one',
       'breakpoint_group' => 'responsive_image_test_module',
       'fallback_image_style' => 'thumbnail',
-    );
+    ];
     $this->drupalPostForm('admin/config/media/responsive-image-style/add', $edit, t('Save'));
 
     // Check if the new group is created.
@@ -64,14 +64,14 @@ public function testResponsiveImageAdmin() {
     $this->assertFieldByName('breakpoint_group', 'responsive_image_test_module');
     $this->assertFieldByName('fallback_image_style', 'thumbnail');
 
-    $cases = array(
-      array('mobile', '1x'),
-      array('mobile', '2x'),
-      array('narrow', '1x'),
-      array('narrow', '2x'),
-      array('wide', '1x'),
-      array('wide', '2x'),
-    );
+    $cases = [
+      ['mobile', '1x'],
+      ['mobile', '2x'],
+      ['narrow', '1x'],
+      ['narrow', '2x'],
+      ['wide', '1x'],
+      ['wide', '2x'],
+    ];
     $image_styles = array_merge(
       [RESPONSIVE_IMAGE_EMPTY_IMAGE, RESPONSIVE_IMAGE_ORIGINAL_IMAGE],
       array_keys(image_style_options(FALSE))
@@ -99,7 +99,7 @@ public function testResponsiveImageAdmin() {
     }
 
     // Save styles for 1x variant only.
-    $edit = array(
+    $edit = [
       'label' => 'Style One',
       'breakpoint_group' => 'responsive_image_test_module',
       'fallback_image_style' => 'thumbnail',
@@ -111,7 +111,7 @@ public function testResponsiveImageAdmin() {
       'keyed_styles[responsive_image_test_module.narrow][1x][sizes_image_styles][medium]' => 'medium',
       'keyed_styles[responsive_image_test_module.wide][1x][image_mapping_type]' => 'image_style',
       'keyed_styles[responsive_image_test_module.wide][1x][image_style]' => 'large',
-    );
+    ];
     $this->drupalPostForm('admin/config/media/responsive-image-style/style_one', $edit, t('Save'));
     $this->drupalGet('admin/config/media/responsive-image-style/style_one');
 
@@ -135,7 +135,7 @@ public function testResponsiveImageAdmin() {
 
     // Delete the style.
     $this->drupalGet('admin/config/media/responsive-image-style/style_one/delete');
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     $this->drupalGet('admin/config/media/responsive-image-style');
     $this->assertText('There is no Responsive image style yet.');
   }
diff --git a/core/modules/responsive_image/src/Tests/ResponsiveImageFieldDisplayTest.php b/core/modules/responsive_image/src/Tests/ResponsiveImageFieldDisplayTest.php
index aef5ec016e0fb63b245d78886eec11181f50f521..b50d71be651be9a7829d0e829be28c7b6fb36832 100644
--- a/core/modules/responsive_image/src/Tests/ResponsiveImageFieldDisplayTest.php
+++ b/core/modules/responsive_image/src/Tests/ResponsiveImageFieldDisplayTest.php
@@ -32,7 +32,7 @@ class ResponsiveImageFieldDisplayTest extends ImageFieldTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_ui', 'responsive_image', 'responsive_image_test_module');
+  public static $modules = ['field_ui', 'responsive_image', 'responsive_image_test_module'];
 
   /**
    * Drupal\simpletest\WebTestBase\setUp().
@@ -41,7 +41,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create user.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer responsive images',
       'access content',
       'access administration pages',
@@ -53,15 +53,15 @@ protected function setUp() {
       'edit any article content',
       'delete any article content',
       'administer image styles'
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
     // Add responsive image style.
-    $this->responsiveImgStyle = ResponsiveImageStyle::create(array(
+    $this->responsiveImgStyle = ResponsiveImageStyle::create([
       'id' => 'style_one',
       'label' => 'Style One',
       'breakpoint_group' => 'responsive_image_test_module',
       'fallback_image_style' => 'large',
-    ));
+    ]);
   }
 
   /**
@@ -78,7 +78,7 @@ public function testResponsiveImageFieldFormattersPublic() {
   public function testResponsiveImageFieldFormattersPrivate() {
     $this->addTestImageStyleMappings();
     // Remove access content permission from anonymous users.
-    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, array('access content' => FALSE));
+    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, ['access content' => FALSE]);
     $this->doTestResponsiveImageFieldFormatters('private');
   }
 
@@ -99,56 +99,56 @@ public function testResponsiveImageFieldFormattersEmptyStyle() {
   protected function addTestImageStyleMappings($empty_styles = FALSE) {
     if ($empty_styles) {
       $this->responsiveImgStyle
-        ->addImageStyleMapping('responsive_image_test_module.mobile', '1x', array(
+        ->addImageStyleMapping('responsive_image_test_module.mobile', '1x', [
           'image_mapping_type' => 'image_style',
           'image_mapping' => '',
-        ))
-        ->addImageStyleMapping('responsive_image_test_module.narrow', '1x', array(
+        ])
+        ->addImageStyleMapping('responsive_image_test_module.narrow', '1x', [
           'image_mapping_type' => 'sizes',
-          'image_mapping' => array(
+          'image_mapping' => [
             'sizes' => '(min-width: 700px) 700px, 100vw',
-            'sizes_image_styles' => array(),
-          ),
-        ))
-        ->addImageStyleMapping('responsive_image_test_module.wide', '1x', array(
+            'sizes_image_styles' => [],
+          ],
+        ])
+        ->addImageStyleMapping('responsive_image_test_module.wide', '1x', [
           'image_mapping_type' => 'image_style',
           'image_mapping' => '',
-        ))
+        ])
         ->save();
     }
     else {
       $this->responsiveImgStyle
         // Test the output of an empty image.
-        ->addImageStyleMapping('responsive_image_test_module.mobile', '1x', array(
+        ->addImageStyleMapping('responsive_image_test_module.mobile', '1x', [
           'image_mapping_type' => 'image_style',
           'image_mapping' => RESPONSIVE_IMAGE_EMPTY_IMAGE,
-        ))
+        ])
         // Test the output with a 1.5x multiplier.
-        ->addImageStyleMapping('responsive_image_test_module.mobile', '1.5x', array(
+        ->addImageStyleMapping('responsive_image_test_module.mobile', '1.5x', [
           'image_mapping_type' => 'image_style',
           'image_mapping' => 'thumbnail',
-        ))
+        ])
         // Test the output of the 'sizes' attribute.
-        ->addImageStyleMapping('responsive_image_test_module.narrow', '1x', array(
+        ->addImageStyleMapping('responsive_image_test_module.narrow', '1x', [
           'image_mapping_type' => 'sizes',
-          'image_mapping' => array(
+          'image_mapping' => [
             'sizes' => '(min-width: 700px) 700px, 100vw',
-            'sizes_image_styles' => array(
+            'sizes_image_styles' => [
               'large',
               'medium',
-            ),
-          ),
-        ))
+            ],
+          ],
+        ])
         // Test the normal output of mapping to an image style.
-        ->addImageStyleMapping('responsive_image_test_module.wide', '1x', array(
+        ->addImageStyleMapping('responsive_image_test_module.wide', '1x', [
           'image_mapping_type' => 'image_style',
           'image_mapping' => 'large',
-        ))
+        ])
         // Test the output of the original image.
-        ->addImageStyleMapping('responsive_image_test_module.wide', '3x', array(
+        ->addImageStyleMapping('responsive_image_test_module.wide', '3x', [
           'image_mapping_type' => 'image_style',
           'image_mapping' => RESPONSIVE_IMAGE_ORIGINAL_IMAGE,
-        ))
+        ])
         ->save();
     }
   }
@@ -169,7 +169,7 @@ protected function doTestResponsiveImageFieldFormatters($scheme, $empty_styles =
     $renderer = $this->container->get('renderer');
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $this->createImageField($field_name, 'article', array('uri_scheme' => $scheme));
+    $this->createImageField($field_name, 'article', ['uri_scheme' => $scheme]);
     // Create a new node with an image attached. Make sure we use a large image
     // so the scale effects of the image styles always have an effect.
     $test_image = current($this->drupalGetTestFiles('image', 39325));
@@ -178,26 +178,26 @@ protected function doTestResponsiveImageFieldFormatters($scheme, $empty_styles =
     $alt = $this->randomMachineName();
 
     $nid = $this->uploadNodeImage($test_image, $field_name, 'article', $alt);
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
     $node = $node_storage->load($nid);
 
     // Test that the default formatter is being used.
     $image_uri = File::load($node->{$field_name}->target_id)->getFileUri();
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#uri' => $image_uri,
       '#width' => 360,
       '#height' => 240,
       '#alt' => $alt,
-    );
+    ];
     $default_output = str_replace("\n", NULL, $renderer->renderRoot($image));
     $this->assertRaw($default_output, 'Default formatter displaying correctly on full node view.');
 
     // Test field not being configured. This should not cause a fatal error.
-    $display_options = array(
+    $display_options = [
       'type' => 'responsive_image_test',
       'settings' => ResponsiveImageFormatter::defaultSettings(),
-    );
+    ];
     $display = $this->container->get('entity.manager')
       ->getStorage('entity_view_display')
       ->load('node.article.default');
@@ -215,13 +215,13 @@ protected function doTestResponsiveImageFieldFormatters($scheme, $empty_styles =
     $this->drupalGet('node/' . $nid);
 
     // Test theme function for responsive image, but using the test formatter.
-    $display_options = array(
+    $display_options = [
       'type' => 'responsive_image_test',
-      'settings' => array(
+      'settings' => [
         'image_link' => 'file',
         'responsive_image_style' => 'style_one',
-      ),
-    );
+      ],
+    ];
     $display = entity_get_display('node', 'article', 'default');
     $display->setComponent($field_name, $display_options)
       ->save();
@@ -229,13 +229,13 @@ protected function doTestResponsiveImageFieldFormatters($scheme, $empty_styles =
     $this->drupalGet('node/' . $nid);
 
     // Use the responsive image formatter linked to file formatter.
-    $display_options = array(
+    $display_options = [
       'type' => 'responsive_image',
-      'settings' => array(
+      'settings' => [
         'image_link' => 'file',
         'responsive_image_style' => 'style_one',
-      ),
-    );
+      ],
+    ];
     $display = entity_get_display('node', 'article', 'default');
     $display->setComponent($field_name, $display_options)
       ->save();
@@ -312,11 +312,11 @@ protected function doTestResponsiveImageFieldFormatters($scheme, $empty_styles =
 
     // Test the fallback image style.
     $image = \Drupal::service('image.factory')->get($image_uri);
-    $fallback_image = array(
+    $fallback_image = [
       '#theme' => 'image',
       '#alt' => $alt,
       '#uri' => file_url_transform_relative($large_style->buildUrl($image->getSource())),
-    );
+    ];
     // The image.html.twig template has a newline after the <img> tag but
     // responsive-image.html.twig doesn't have one after the fallback image, so
     // we remove it here.
@@ -355,32 +355,32 @@ public function testResponsiveImageFieldFormattersLinkToNode() {
   public function testResponsiveImageFieldFormattersEmptyMediaQuery() {
     $this->responsiveImgStyle
       // Test the output of an empty media query.
-      ->addImageStyleMapping('responsive_image_test_module.empty', '1x', array(
+      ->addImageStyleMapping('responsive_image_test_module.empty', '1x', [
         'image_mapping_type' => 'image_style',
         'image_mapping' => RESPONSIVE_IMAGE_EMPTY_IMAGE,
-      ))
+      ])
       // Test the output with a 1.5x multiplier.
-      ->addImageStyleMapping('responsive_image_test_module.mobile', '1x', array(
+      ->addImageStyleMapping('responsive_image_test_module.mobile', '1x', [
         'image_mapping_type' => 'image_style',
         'image_mapping' => 'thumbnail',
-      ))
+      ])
       ->save();
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $this->createImageField($field_name, 'article', array('uri_scheme' => 'public'));
+    $this->createImageField($field_name, 'article', ['uri_scheme' => 'public']);
     // Create a new node with an image attached.
     $test_image = current($this->drupalGetTestFiles('image'));
     $nid = $this->uploadNodeImage($test_image, $field_name, 'article', $this->randomMachineName());
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
 
     // Use the responsive image formatter linked to file formatter.
-    $display_options = array(
+    $display_options = [
       'type' => 'responsive_image',
-      'settings' => array(
+      'settings' => [
         'image_link' => '',
         'responsive_image_style' => 'style_one',
-      ),
-    );
+      ],
+    ];
     $display = entity_get_display('node', 'article', 'default');
     $display->setComponent($field_name, $display_options)
       ->save();
@@ -404,31 +404,31 @@ public function testResponsiveImageFieldFormattersEmptyMediaQuery() {
   public function testResponsiveImageFieldFormattersOneSource() {
     $this->responsiveImgStyle
       // Test the output of an empty media query.
-      ->addImageStyleMapping('responsive_image_test_module.empty', '1x', array(
+      ->addImageStyleMapping('responsive_image_test_module.empty', '1x', [
         'image_mapping_type' => 'image_style',
         'image_mapping' => 'medium',
-      ))
-      ->addImageStyleMapping('responsive_image_test_module.empty', '2x', array(
+      ])
+      ->addImageStyleMapping('responsive_image_test_module.empty', '2x', [
           'image_mapping_type' => 'image_style',
           'image_mapping' => 'large',
-        ))
+        ])
       ->save();
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $this->createImageField($field_name, 'article', array('uri_scheme' => 'public'));
+    $this->createImageField($field_name, 'article', ['uri_scheme' => 'public']);
     // Create a new node with an image attached.
     $test_image = current($this->drupalGetTestFiles('image'));
     $nid = $this->uploadNodeImage($test_image, $field_name, 'article', $this->randomMachineName());
-    $node_storage->resetCache(array($nid));
+    $node_storage->resetCache([$nid]);
 
     // Use the responsive image formatter linked to file formatter.
-    $display_options = array(
+    $display_options = [
       'type' => 'responsive_image',
-      'settings' => array(
+      'settings' => [
         'image_link' => '',
         'responsive_image_style' => 'style_one',
-      ),
-    );
+      ],
+    ];
     $display = entity_get_display('node', 'article', 'default');
     $display->setComponent($field_name, $display_options)
       ->save();
@@ -452,19 +452,19 @@ public function testResponsiveImageFieldFormattersOneSource() {
    */
   private function assertResponsiveImageFieldFormattersLink($link_type) {
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $field_settings = array('alt_field_required' => 0);
-    $this->createImageField($field_name, 'article', array('uri_scheme' => 'public'), $field_settings);
+    $field_settings = ['alt_field_required' => 0];
+    $this->createImageField($field_name, 'article', ['uri_scheme' => 'public'], $field_settings);
     // Create a new node with an image attached.
     $test_image = current($this->drupalGetTestFiles('image'));
 
     // Test the image linked to file formatter.
-    $display_options = array(
+    $display_options = [
       'type' => 'responsive_image',
-      'settings' => array(
+      'settings' => [
         'image_link' => $link_type,
         'responsive_image_style' => 'style_one',
-      ),
-    );
+      ],
+    ];
     entity_get_display('node', 'article', 'default')
       ->setComponent($field_name, $display_options)
       ->save();
@@ -475,17 +475,17 @@ private function assertResponsiveImageFieldFormattersLink($link_type) {
     $this->assertPattern('/picture/');
 
     $nid = $this->uploadNodeImage($test_image, $field_name, 'article');
-    $this->container->get('entity.manager')->getStorage('node')->resetCache(array($nid));
+    $this->container->get('entity.manager')->getStorage('node')->resetCache([$nid]);
     $node = Node::load($nid);
 
     // Use the responsive image formatter linked to file formatter.
-    $display_options = array(
+    $display_options = [
       'type' => 'responsive_image',
-      'settings' => array(
+      'settings' => [
         'image_link' => $link_type,
         'responsive_image_style' => 'style_one',
-      ),
-    );
+      ],
+    ];
     entity_get_display('node', 'article', 'default')
       ->setComponent($field_name, $display_options)
       ->save();
diff --git a/core/modules/responsive_image/src/Tests/ResponsiveImageFieldUiTest.php b/core/modules/responsive_image/src/Tests/ResponsiveImageFieldUiTest.php
index 3d0e32ee6b1709f1ec0902ca26eb3231f57fc19b..a091504fcc61c947a4e9033d482acd34f73af3e6 100644
--- a/core/modules/responsive_image/src/Tests/ResponsiveImageFieldUiTest.php
+++ b/core/modules/responsive_image/src/Tests/ResponsiveImageFieldUiTest.php
@@ -21,7 +21,7 @@ class ResponsiveImageFieldUiTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_ui', 'image', 'responsive_image', 'responsive_image_test_module', 'block');
+  public static $modules = ['node', 'field_ui', 'image', 'responsive_image', 'responsive_image_test_module', 'block'];
 
   /**
    * {@inheritdoc}
@@ -30,12 +30,12 @@ protected function setUp() {
     parent::setUp();
     $this->drupalPlaceBlock('system_breadcrumb_block');
     // Create a test user.
-    $admin_user = $this->drupalCreateUser(array('access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'bypass node access'));
+    $admin_user = $this->drupalCreateUser(['access content', 'administer content types', 'administer node fields', 'administer node form display', 'administer node display', 'bypass node access']);
     $this->drupalLogin($admin_user);
 
     // Create content type, with underscores.
     $type_name = strtolower($this->randomMachineName(8)) . '_test';
-    $type = $this->drupalCreateContentType(array('name' => $type_name, 'type' => $type_name));
+    $type = $this->drupalCreateContentType(['name' => $type_name, 'type' => $type_name]);
     $this->type = $type->id();
   }
 
@@ -52,39 +52,39 @@ function testResponsiveImageFormatterUI() {
     $this->drupalGet($manage_display);
 
     // Change the formatter and check that the summary is updated.
-    $edit = array(
+    $edit = [
       'fields[field_image][type]' => 'responsive_image',
       'fields[field_image][region]' => 'content',
       'refresh_rows' => 'field_image',
-    );
-    $this->drupalPostAjaxForm(NULL, $edit, array('op' => t('Refresh')));
+    ];
+    $this->drupalPostAjaxForm(NULL, $edit, ['op' => t('Refresh')]);
     $this->assertText("Select a responsive image style.", 'The expected summary is displayed.');
 
     // Submit the form.
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $this->assertText("Select a responsive image style.", 'The expected summary is displayed.');
 
     // Create responsive image styles.
-    $responsive_image_style = ResponsiveImageStyle::create(array(
+    $responsive_image_style = ResponsiveImageStyle::create([
       'id' => 'style_one',
       'label' => 'Style One',
       'breakpoint_group' => 'responsive_image_test_module',
       'fallback_image_style' => 'thumbnail',
-    ));
+    ]);
     $responsive_image_style
-      ->addImageStyleMapping('responsive_image_test_module.mobile', '1x', array(
+      ->addImageStyleMapping('responsive_image_test_module.mobile', '1x', [
         'image_mapping_type' => 'image_style',
         'image_mapping' => 'thumbnail',
-      ))
-      ->addImageStyleMapping('responsive_image_test_module.narrow', '1x', array(
+      ])
+      ->addImageStyleMapping('responsive_image_test_module.narrow', '1x', [
         'image_mapping_type' => 'image_style',
         'image_mapping' => 'medium'
-      ))
+      ])
       // Test the normal output of mapping to an image style.
-      ->addImageStyleMapping('responsive_image_test_module.wide', '1x', array(
+      ->addImageStyleMapping('responsive_image_test_module.wide', '1x', [
         'image_mapping_type' => 'image_style',
         'image_mapping' => 'large',
-      ))
+      ])
       ->save();
     \Drupal::entityManager()->clearCachedFieldDefinitions();
     // Refresh the page.
@@ -93,38 +93,38 @@ function testResponsiveImageFormatterUI() {
 
     // Click on the formatter settings button to open the formatter settings
     // form.
-    $this->drupalPostAjaxForm(NULL, array(), "field_image_settings_edit");
+    $this->drupalPostAjaxForm(NULL, [], "field_image_settings_edit");
 
     // Assert that the correct fields are present.
-    $fieldnames = array(
+    $fieldnames = [
       'fields[field_image][settings_edit_form][settings][responsive_image_style]',
       'fields[field_image][settings_edit_form][settings][image_link]',
-    );
+    ];
     foreach ($fieldnames as $fieldname) {
       $this->assertField($fieldname);
     }
-    $edit = array(
+    $edit = [
       'fields[field_image][settings_edit_form][settings][responsive_image_style]' => 'style_one',
       'fields[field_image][settings_edit_form][settings][image_link]' => 'content',
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, "field_image_plugin_settings_update");
 
     // Save the form to save the settings.
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $this->assertText('Responsive image style: Style One');
     $this->assertText('Linked to content');
 
     // Click on the formatter settings button to open the formatter settings
     // form.
-    $this->drupalPostAjaxForm(NULL, array(), "field_image_settings_edit");
-    $edit = array(
+    $this->drupalPostAjaxForm(NULL, [], "field_image_settings_edit");
+    $edit = [
       'fields[field_image][settings_edit_form][settings][responsive_image_style]' => 'style_one',
       'fields[field_image][settings_edit_form][settings][image_link]' => 'file',
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, "field_image_plugin_settings_update");
 
     // Save the form to save the third party settings.
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $this->assertText('Responsive image style: Style One');
     $this->assertText('Linked to file');
   }
diff --git a/core/modules/responsive_image/tests/src/Unit/ResponsiveImageStyleConfigEntityUnitTest.php b/core/modules/responsive_image/tests/src/Unit/ResponsiveImageStyleConfigEntityUnitTest.php
index c3f45e9d4ff549ad70cb9cbf19634a780a1cbde2..bc9663dcf2603cb3483edf4fc076fe8449ea5760 100644
--- a/core/modules/responsive_image/tests/src/Unit/ResponsiveImageStyleConfigEntityUnitTest.php
+++ b/core/modules/responsive_image/tests/src/Unit/ResponsiveImageStyleConfigEntityUnitTest.php
@@ -101,7 +101,7 @@ public function testCalculateDependencies() {
     $this->breakpointManager->expects($this->any())
       ->method('getGroupProviders')
       ->with('test_group')
-      ->willReturn(array('bartik' => 'theme', 'toolbar' => 'module'));
+      ->willReturn(['bartik' => 'theme', 'toolbar' => 'module']);
 
     $dependencies = $entity->calculateDependencies()->getDependencies();
     $this->assertEquals(['toolbar'], $dependencies['module']);
@@ -114,49 +114,49 @@ public function testCalculateDependencies() {
    * @covers ::hasImageStyleMappings
    */
   public function testHasImageStyleMappings() {
-    $entity = new ResponsiveImageStyle(array());
+    $entity = new ResponsiveImageStyle([]);
     $this->assertFalse($entity->hasImageStyleMappings());
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
         'image_mapping_type' => 'image_style',
         'image_mapping' => '',
-    ));
+    ]);
     $this->assertFalse($entity->hasImageStyleMappings());
     $entity->removeImageStyleMappings();
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
         'image_mapping_type' => 'sizes',
-        'image_mapping' => array(
+        'image_mapping' => [
           'sizes' => '(min-width:700px) 700px, 100vw',
-          'sizes_image_styles' => array(),
-        ),
-    ));
+          'sizes_image_styles' => [],
+        ],
+    ]);
     $this->assertFalse($entity->hasImageStyleMappings());
     $entity->removeImageStyleMappings();
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
         'image_mapping_type' => 'sizes',
-        'image_mapping' => array(
+        'image_mapping' => [
           'sizes' => '',
-          'sizes_image_styles' => array(
+          'sizes_image_styles' => [
             'large' => 'large',
-          ),
-        ),
-    ));
+          ],
+        ],
+    ]);
     $this->assertFalse($entity->hasImageStyleMappings());
     $entity->removeImageStyleMappings();
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
         'image_mapping_type' => 'image_style',
         'image_mapping' => 'large',
-    ));
+    ]);
     $this->assertTrue($entity->hasImageStyleMappings());
     $entity->removeImageStyleMappings();
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
         'image_mapping_type' => 'sizes',
-        'image_mapping' => array(
+        'image_mapping' => [
           'sizes' => '(min-width:700px) 700px, 100vw',
-          'sizes_image_styles' => array(
+          'sizes_image_styles' => [
             'large' => 'large',
-          ),
-        ),
-    ));
+          ],
+        ],
+    ]);
     $this->assertTrue($entity->hasImageStyleMappings());
   }
 
@@ -165,17 +165,17 @@ public function testHasImageStyleMappings() {
    * @covers ::getImageStyleMapping
    */
   public function testGetImageStyleMapping() {
-    $entity = new ResponsiveImageStyle(array(''));
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity = new ResponsiveImageStyle(['']);
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'large',
-    ));
-    $expected = array(
+    ]);
+    $expected = [
       'breakpoint_id' => 'test_breakpoint',
       'multiplier' => '1x',
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'large',
-    );
+    ];
     $this->assertEquals($expected, $entity->getImageStyleMapping('test_breakpoint', '1x'));
     $this->assertNull($entity->getImageStyleMapping('test_unknown_breakpoint', '1x'));
   }
@@ -185,90 +185,90 @@ public function testGetImageStyleMapping() {
    * @covers ::getKeyedImageStyleMappings
    */
   public function testGetKeyedImageStyleMappings() {
-    $entity = new ResponsiveImageStyle(array(''));
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity = new ResponsiveImageStyle(['']);
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'large',
-    ));
-    $entity->addImageStyleMapping('test_breakpoint', '2x', array(
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint', '2x', [
       'image_mapping_type' => 'sizes',
-      'image_mapping' => array(
+      'image_mapping' => [
         'sizes' => '(min-width:700px) 700px, 100vw',
-        'sizes_image_styles' => array(
+        'sizes_image_styles' => [
           'large' => 'large',
-        ),
-      ),
-    ));
-    $entity->addImageStyleMapping('test_breakpoint2', '1x', array(
+        ],
+      ],
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint2', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'thumbnail',
-    ));
-    $entity->addImageStyleMapping('test_breakpoint2', '2x', array(
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint2', '2x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => '_original image_',
-    ));
+    ]);
 
-    $expected = array(
-      'test_breakpoint' => array(
-        '1x' => array(
+    $expected = [
+      'test_breakpoint' => [
+        '1x' => [
           'breakpoint_id' => 'test_breakpoint',
           'multiplier' => '1x',
           'image_mapping_type' => 'image_style',
           'image_mapping' => 'large',
-        ),
-        '2x' => array(
+        ],
+        '2x' => [
           'breakpoint_id' => 'test_breakpoint',
           'multiplier' => '2x',
           'image_mapping_type' => 'sizes',
-          'image_mapping' => array(
+          'image_mapping' => [
             'sizes' => '(min-width:700px) 700px, 100vw',
-            'sizes_image_styles' => array(
+            'sizes_image_styles' => [
               'large' => 'large',
-            ),
-          ),
-        ),
-      ),
-      'test_breakpoint2' => array(
-        '1x' => array(
+            ],
+          ],
+        ],
+      ],
+      'test_breakpoint2' => [
+        '1x' => [
           'breakpoint_id' => 'test_breakpoint2',
           'multiplier' => '1x',
           'image_mapping_type' => 'image_style',
           'image_mapping' => 'thumbnail',
-        ),
-        '2x' => array(
+        ],
+        '2x' => [
           'breakpoint_id' => 'test_breakpoint2',
           'multiplier' => '2x',
           'image_mapping_type' => 'image_style',
           'image_mapping' => '_original image_',
-        ),
-      )
-    );
+        ],
+      ]
+    ];
     $this->assertEquals($expected, $entity->getKeyedImageStyleMappings());
 
     // Add another mapping to ensure keyed mapping static cache is rebuilt.
-    $entity->addImageStyleMapping('test_breakpoint2', '2x', array(
+    $entity->addImageStyleMapping('test_breakpoint2', '2x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'medium',
-    ));
-    $expected['test_breakpoint2']['2x'] = array(
+    ]);
+    $expected['test_breakpoint2']['2x'] = [
       'breakpoint_id' => 'test_breakpoint2',
       'multiplier' => '2x',
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'medium',
-    );
+    ];
     $this->assertEquals($expected, $entity->getKeyedImageStyleMappings());
 
     // Overwrite a mapping to ensure keyed mapping static cache is rebuilt.
-    $entity->addImageStyleMapping('test_breakpoint2', '2x', array(
+    $entity->addImageStyleMapping('test_breakpoint2', '2x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'large',
-    ));
-    $expected['test_breakpoint2']['2x'] = array(
+    ]);
+    $expected['test_breakpoint2']['2x'] = [
       'breakpoint_id' => 'test_breakpoint2',
       'multiplier' => '2x',
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'large',
-    );
+    ];
     $this->assertEquals($expected, $entity->getKeyedImageStyleMappings());
   }
 
@@ -277,50 +277,50 @@ public function testGetKeyedImageStyleMappings() {
    * @covers ::getImageStyleMappings
    */
   public function testGetImageStyleMappings() {
-    $entity = new ResponsiveImageStyle(array(''));
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity = new ResponsiveImageStyle(['']);
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'large',
-    ));
-    $entity->addImageStyleMapping('test_breakpoint', '2x', array(
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint', '2x', [
       'image_mapping_type' => 'sizes',
-      'image_mapping' => array(
+      'image_mapping' => [
         'sizes' => '(min-width:700px) 700px, 100vw',
-        'sizes_image_styles' => array(
+        'sizes_image_styles' => [
           'large' => 'large',
-        ),
-      ),
-    ));
-    $entity->addImageStyleMapping('test_breakpoint2', '1x', array(
+        ],
+      ],
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint2', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'thumbnail',
-    ));
+    ]);
 
-    $expected = array(
-      array(
+    $expected = [
+      [
         'breakpoint_id' => 'test_breakpoint',
         'multiplier' => '1x',
         'image_mapping_type' => 'image_style',
         'image_mapping' => 'large',
-      ),
-      array(
+      ],
+      [
         'breakpoint_id' => 'test_breakpoint',
         'multiplier' => '2x',
         'image_mapping_type' => 'sizes',
-        'image_mapping' => array(
+        'image_mapping' => [
           'sizes' => '(min-width:700px) 700px, 100vw',
-          'sizes_image_styles' => array(
+          'sizes_image_styles' => [
             'large' => 'large',
-          ),
-        ),
-      ),
-      array(
+          ],
+        ],
+      ],
+      [
         'breakpoint_id' => 'test_breakpoint2',
         'multiplier' => '1x',
         'image_mapping_type' => 'image_style',
         'image_mapping' => 'thumbnail',
-      ),
-    );
+      ],
+    ];
     $this->assertEquals($expected, $entity->getImageStyleMappings());
   }
 
@@ -329,24 +329,24 @@ public function testGetImageStyleMappings() {
    * @covers ::removeImageStyleMappings
    */
   public function testRemoveImageStyleMappings() {
-    $entity = new ResponsiveImageStyle(array(''));
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity = new ResponsiveImageStyle(['']);
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'large',
-    ));
-    $entity->addImageStyleMapping('test_breakpoint', '2x', array(
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint', '2x', [
       'image_mapping_type' => 'sizes',
-      'image_mapping' => array(
+      'image_mapping' => [
         'sizes' => '(min-width:700px) 700px, 100vw',
-        'sizes_image_styles' => array(
+        'sizes_image_styles' => [
           'large' => 'large',
-        ),
-      ),
-    ));
-    $entity->addImageStyleMapping('test_breakpoint2', '1x', array(
+        ],
+      ],
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint2', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'thumbnail',
-    ));
+    ]);
 
     $this->assertTrue($entity->hasImageStyleMappings());
     $entity->removeImageStyleMappings();
@@ -360,24 +360,24 @@ public function testRemoveImageStyleMappings() {
    * @covers ::getBreakpointGroup
    */
   public function testSetBreakpointGroup() {
-    $entity = new ResponsiveImageStyle(array('breakpoint_group' => 'test_group'));
-    $entity->addImageStyleMapping('test_breakpoint', '1x', array(
+    $entity = new ResponsiveImageStyle(['breakpoint_group' => 'test_group']);
+    $entity->addImageStyleMapping('test_breakpoint', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'large',
-    ));
-    $entity->addImageStyleMapping('test_breakpoint', '2x', array(
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint', '2x', [
       'image_mapping_type' => 'sizes',
-      'image_mapping' => array(
+      'image_mapping' => [
         'sizes' => '(min-width:700px) 700px, 100vw',
-        'sizes_image_styles' => array(
+        'sizes_image_styles' => [
           'large' => 'large',
-        ),
-      ),
-    ));
-    $entity->addImageStyleMapping('test_breakpoint2', '1x', array(
+        ],
+      ],
+    ]);
+    $entity->addImageStyleMapping('test_breakpoint2', '1x', [
       'image_mapping_type' => 'image_style',
       'image_mapping' => 'thumbnail',
-    ));
+    ]);
 
     // Ensure that setting to same group does not remove mappings.
     $entity->setBreakpointGroup('test_group');
diff --git a/core/modules/rest/rest.api.php b/core/modules/rest/rest.api.php
index 9bf6921c09bf93ed78edce5513179a5a9a54eab2..ac601072bea0a4002ed74e5299bca9d19f275d9e 100644
--- a/core/modules/rest/rest.api.php
+++ b/core/modules/rest/rest.api.php
@@ -47,7 +47,7 @@ function hook_rest_resource_alter(&$definitions) {
  * @see \Symfony\Component\Serializer\NormalizerInterface::normalize()
  * @see \Symfony\Component\Serializer\DenormalizerInterface::denormalize()
  */
-function hook_rest_type_uri_alter(&$uri, $context = array()) {
+function hook_rest_type_uri_alter(&$uri, $context = []) {
   if ($context['mymodule'] == TRUE) {
     $base = \Drupal::config('serialization.settings')->get('link_domain');
     $uri = str_replace($base, 'http://mymodule.domain', $uri);
@@ -74,7 +74,7 @@ function hook_rest_type_uri_alter(&$uri, $context = array()) {
  * @see \Symfony\Component\Serializer\NormalizerInterface::normalize()
  * @see \Symfony\Component\Serializer\DenormalizerInterface::denormalize()
  */
-function hook_rest_relation_uri_alter(&$uri, $context = array()) {
+function hook_rest_relation_uri_alter(&$uri, $context = []) {
   if ($context['mymodule'] == TRUE) {
     $base = \Drupal::config('serialization.settings')->get('link_domain');
     $uri = str_replace($base, 'http://mymodule.domain', $uri);
diff --git a/core/modules/rest/rest.install b/core/modules/rest/rest.install
index e7b539417c5f3820f7446a143f10dba65bb28e79..ca507ceb188e26531fe9875b4a7b2e7ea966dc16 100644
--- a/core/modules/rest/rest.install
+++ b/core/modules/rest/rest.install
@@ -12,15 +12,15 @@
  * Implements hook_requirements().
  */
 function rest_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
 
   if (version_compare(PHP_VERSION, '5.6.0', '>=') && version_compare(PHP_VERSION, '7', '<') && ini_get('always_populate_raw_post_data') != -1) {
-    $requirements['always_populate_raw_post_data'] = array(
+    $requirements['always_populate_raw_post_data'] = [
       'title' => t('always_populate_raw_post_data PHP setting'),
       'value' => t('Not set to -1.'),
       'severity' => REQUIREMENT_ERROR,
       'description' => t('The always_populate_raw_post_data PHP setting should be set to -1 in PHP version 5.6. Please check the <a href="https://php.net/manual/en/ini.core.php#ini.always-populate-raw-post-data">PHP manual</a> for information on how to correct this.'),
-    );
+    ];
   }
   return $requirements;
 }
diff --git a/core/modules/rest/rest.module b/core/modules/rest/rest.module
index 24e1c5f7024999cc930b499b444753583e53da4b..afdb9ffe3c3dd36200740b9d83ea47d03cc2e44f 100644
--- a/core/modules/rest/rest.module
+++ b/core/modules/rest/rest.module
@@ -15,13 +15,13 @@ function rest_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.rest':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The RESTful Web Services module provides a framework for exposing REST resources on your site. It provides support for content entities (see the <a href=":field">Field module help page</a> for more information about entities) such as content, users, taxonomy terms, etc.; REST support for content items of the Node module is enabled by default, and support for other types of content entities can be enabled. Other modules may add support for other types of REST resources. For more information, see the <a href=":rest">online documentation for the RESTful Web Services module</a>.', array(':rest' => 'https://www.drupal.org/documentation/modules/rest', ':field' => (\Drupal::moduleHandler()->moduleExists('field')) ? \Drupal::url('help.page', array('name' => 'field')) : '#')) . '</p>';
+      $output .= '<p>' . t('The RESTful Web Services module provides a framework for exposing REST resources on your site. It provides support for content entities (see the <a href=":field">Field module help page</a> for more information about entities) such as content, users, taxonomy terms, etc.; REST support for content items of the Node module is enabled by default, and support for other types of content entities can be enabled. Other modules may add support for other types of REST resources. For more information, see the <a href=":rest">online documentation for the RESTful Web Services module</a>.', [':rest' => 'https://www.drupal.org/documentation/modules/rest', ':field' => (\Drupal::moduleHandler()->moduleExists('field')) ? \Drupal::url('help.page', ['name' => 'field']) : '#']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Installing supporting modules') . '</dt>';
-      $output .= '<dd>' . t('In order to use REST on a web site, you need to install modules that provide serialization and authentication services. You can use the Core module <a href=":hal">HAL</a> for serialization and <a href=":basic_auth">HTTP Basic Authentication</a> for authentication, or install a contributed or custom module.', array(':hal' => (\Drupal::moduleHandler()->moduleExists('hal')) ? \Drupal::url('help.page', array('name' => 'hal')) : '#', ':basic_auth' => (\Drupal::moduleHandler()->moduleExists('basic_auth')) ? \Drupal::url('help.page', array('name' => 'basic_auth')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('In order to use REST on a web site, you need to install modules that provide serialization and authentication services. You can use the Core module <a href=":hal">HAL</a> for serialization and <a href=":basic_auth">HTTP Basic Authentication</a> for authentication, or install a contributed or custom module.', [':hal' => (\Drupal::moduleHandler()->moduleExists('hal')) ? \Drupal::url('help.page', ['name' => 'hal']) : '#', ':basic_auth' => (\Drupal::moduleHandler()->moduleExists('basic_auth')) ? \Drupal::url('help.page', ['name' => 'basic_auth']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Enabling REST support for an entity type') . '</dt>';
-      $output .= '<dd>' . t('REST support for content items of the Node module is enabled by default, and support for other types of content entities can be enabled. To enable support, you can use a <a href=":config">process based on configuration editing</a> or the contributed <a href=":restui">Rest UI module</a>.', array(':config' => 'https://www.drupal.org/documentation/modules/rest', ':restui' => 'https://www.drupal.org/project/restui')) . '</dd>';
+      $output .= '<dd>' . t('REST support for content items of the Node module is enabled by default, and support for other types of content entities can be enabled. To enable support, you can use a <a href=":config">process based on configuration editing</a> or the contributed <a href=":restui">Rest UI module</a>.', [':config' => 'https://www.drupal.org/documentation/modules/rest', ':restui' => 'https://www.drupal.org/project/restui']) . '</dd>';
       $output .= '<dd>' . t('You will also need to grant anonymous users permission to perform each of the REST operations you want to be available, and set up authentication properly to authorize web requests.') . '</dd>';
       $output .= '</dl>';
       return $output;
diff --git a/core/modules/rest/src/Plugin/Deriver/EntityDeriver.php b/core/modules/rest/src/Plugin/Deriver/EntityDeriver.php
index 6a6ddae96720767e7ffa0118ac05a215ff66117f..010fad7363e61319b1e5e66c8d72bcc1a423171a 100644
--- a/core/modules/rest/src/Plugin/Deriver/EntityDeriver.php
+++ b/core/modules/rest/src/Plugin/Deriver/EntityDeriver.php
@@ -65,17 +65,17 @@ public function getDerivativeDefinitions($base_plugin_definition) {
     if (!isset($this->derivatives)) {
       // Add in the default plugin configuration and the resource type.
       foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
-        $this->derivatives[$entity_type_id] = array(
+        $this->derivatives[$entity_type_id] = [
           'id' => 'entity:' . $entity_type_id,
           'entity_type' => $entity_type_id,
           'serialization_class' => $entity_type->getClass(),
           'label' => $entity_type->getLabel(),
-        );
+        ];
 
-        $default_uris = array(
+        $default_uris = [
           'canonical' => "/entity/$entity_type_id/" . '{' . $entity_type_id . '}',
           'https://www.drupal.org/link-relations/create' => "/entity/$entity_type_id",
-        );
+        ];
 
         foreach ($default_uris as $link_relation => $default_uri) {
           // Check if there are link templates defined for the entity type and
diff --git a/core/modules/rest/src/Plugin/ResourceBase.php b/core/modules/rest/src/Plugin/ResourceBase.php
index 93684dbbc415df5d8fc3a7258b44490d389e4c70..3062aa29ed8b4b3cbb3ac8b9a5425ad42289122a 100644
--- a/core/modules/rest/src/Plugin/ResourceBase.php
+++ b/core/modules/rest/src/Plugin/ResourceBase.php
@@ -31,7 +31,7 @@ abstract class ResourceBase extends PluginBase implements ContainerFactoryPlugin
    *
    * @var array
    */
-  protected $serializerFormats = array();
+  protected $serializerFormats = [];
 
   /**
    * A logger instance.
@@ -81,13 +81,13 @@ public static function create(ContainerInterface $container, array $configuratio
    * resource".
    */
   public function permissions() {
-    $permissions = array();
+    $permissions = [];
     $definition = $this->getPluginDefinition();
     foreach ($this->availableMethods() as $method) {
       $lowered_method = strtolower($method);
-      $permissions["restful $lowered_method $this->pluginId"] = array(
-        'title' => $this->t('Access @method on %label resource', array('@method' => $method, '%label' => $definition['label'])),
-      );
+      $permissions["restful $lowered_method $this->pluginId"] = [
+        'title' => $this->t('Access @method on %label resource', ['@method' => $method, '%label' => $definition['label']]),
+      ];
     }
     return $permissions;
   }
@@ -113,14 +113,14 @@ public function routes() {
           $route->setPath($create_path);
           // Restrict the incoming HTTP Content-type header to the known
           // serialization formats.
-          $route->addRequirements(array('_content_type_format' => implode('|', $this->serializerFormats)));
+          $route->addRequirements(['_content_type_format' => implode('|', $this->serializerFormats)]);
           $collection->add("$route_name.$method", $route);
           break;
 
         case 'PATCH':
           // Restrict the incoming HTTP Content-type header to the known
           // serialization formats.
-          $route->addRequirements(array('_content_type_format' => implode('|', $this->serializerFormats)));
+          $route->addRequirements(['_content_type_format' => implode('|', $this->serializerFormats)]);
           $collection->add("$route_name.$method", $route);
           break;
 
@@ -131,7 +131,7 @@ public function routes() {
           foreach ($this->serializerFormats as $format_name) {
             // Expose one route per available format.
             $format_route = clone $route;
-            $format_route->addRequirements(array('_format' => $format_name));
+            $format_route->addRequirements(['_format' => $format_name]);
             $collection->add("$route_name.$method.$format_name", $format_route);
           }
           break;
@@ -155,7 +155,7 @@ public function routes() {
    *   The list of allowed HTTP request method strings.
    */
   protected function requestMethods() {
-    return array(
+    return [
       'HEAD',
       'GET',
       'POST',
@@ -165,7 +165,7 @@ protected function requestMethods() {
       'OPTIONS',
       'CONNECT',
       'PATCH',
-    );
+    ];
   }
 
   /**
@@ -173,7 +173,7 @@ protected function requestMethods() {
    */
   public function availableMethods() {
     $methods = $this->requestMethods();
-    $available = array();
+    $available = [];
     foreach ($methods as $method) {
       // Only expose methods where the HTTP request method exists on the plugin.
       if (method_exists($this, strtolower($method))) {
@@ -195,15 +195,15 @@ public function availableMethods() {
    *   The created base route.
    */
   protected function getBaseRoute($canonical_path, $method) {
-    return new Route($canonical_path, array(
+    return new Route($canonical_path, [
       '_controller' => 'Drupal\rest\RequestHandler::handle',
-    ),
+    ],
       $this->getBaseRouteRequirements($method),
-      array(),
+      [],
       '',
-      array(),
+      [],
       // The HTTP method is a requirement for this route.
-      array($method)
+      [$method]
     );
   }
 
diff --git a/core/modules/rest/src/Plugin/rest/resource/EntityResource.php b/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
index a66d5ab9948f553c9e62a9df189c4252f7876a98..a4162b511cf72aeaef4e451e29a3ec5ea4004d7f 100644
--- a/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
+++ b/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
@@ -184,7 +184,7 @@ public function post(EntityInterface $entity = NULL) {
     $this->validate($entity);
     try {
       $entity->save();
-      $this->logger->notice('Created entity %type with ID %id.', array('%type' => $entity->getEntityTypeId(), '%id' => $entity->id()));
+      $this->logger->notice('Created entity %type with ID %id.', ['%type' => $entity->getEntityTypeId(), '%id' => $entity->id()]);
 
       // 201 Created responses return the newly created entity in the response
       // body. These responses are not cacheable, so we add no cacheability
@@ -296,7 +296,7 @@ public function patch(EntityInterface $original_entity, EntityInterface $entity
     $this->validate($original_entity);
     try {
       $original_entity->save();
-      $this->logger->notice('Updated entity %type with ID %id.', array('%type' => $original_entity->getEntityTypeId(), '%id' => $original_entity->id()));
+      $this->logger->notice('Updated entity %type with ID %id.', ['%type' => $original_entity->getEntityTypeId(), '%id' => $original_entity->id()]);
 
       // Return the updated entity in the response body.
       return new ModifiedResourceResponse($original_entity, 200);
@@ -324,7 +324,7 @@ public function delete(EntityInterface $entity) {
     }
     try {
       $entity->delete();
-      $this->logger->notice('Deleted entity %type with ID %id.', array('%type' => $entity->getEntityTypeId(), '%id' => $entity->id()));
+      $this->logger->notice('Deleted entity %type with ID %id.', ['%type' => $entity->getEntityTypeId(), '%id' => $entity->id()]);
 
       // DELETE responses have an empty body.
       return new ModifiedResourceResponse(NULL, 204);
@@ -376,7 +376,7 @@ protected function getBaseRoute($canonical_path, $method) {
     $route = parent::getBaseRoute($canonical_path, $method);
     $definition = $this->getPluginDefinition();
 
-    $parameters = $route->getOption('parameters') ?: array();
+    $parameters = $route->getOption('parameters') ?: [];
     $parameters[$definition['entity_type']]['type'] = 'entity:' . $definition['entity_type'];
     $route->setOption('parameters', $parameters);
 
diff --git a/core/modules/rest/src/Plugin/views/display/RestExport.php b/core/modules/rest/src/Plugin/views/display/RestExport.php
index 65bce232571cd80fbeeb7075d65138226e3a9bf4..cd961954a4dde0f5c0c4d744aa9b41780fecbf7b 100644
--- a/core/modules/rest/src/Plugin/views/display/RestExport.php
+++ b/core/modules/rest/src/Plugin/views/display/RestExport.php
@@ -266,21 +266,21 @@ public function optionsSummary(&$categories, &$options) {
     // Hide some settings, as they aren't useful for pure data output.
     unset($options['show_admin_links'], $options['analyze-theme']);
 
-    $categories['path'] = array(
+    $categories['path'] = [
       'title' => $this->t('Path settings'),
       'column' => 'second',
-      'build' => array(
+      'build' => [
         '#weight' => -10,
-      ),
-    );
+      ],
+    ];
 
     $options['path']['category'] = 'path';
     $options['path']['title'] = $this->t('Path');
-    $options['auth'] = array(
+    $options['auth'] = [
       'category' => 'path',
       'title' => $this->t('Authentication'),
       'value' => views_ui_truncate($auth, 24),
-    );
+    ];
 
     // Remove css/exposed form settings, as they are not used for the data
     // display.
@@ -296,13 +296,13 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
     if ($form_state->get('section') === 'auth') {
       $form['#title'] .= $this->t('The supported authentication methods for this view');
-      $form['auth'] = array(
+      $form['auth'] = [
         '#type' => 'checkboxes',
         '#title' => $this->t('Authentication methods'),
         '#description' => $this->t('These are the supported authentication providers for this view. When this view is requested, the client will be forced to authenticate with one of the selected providers. Make sure you set the appropriate requirements at the <em>Access</em> section since the Authentication System will fallback to the anonymous user if it fails to authenticate. For example: require Access: Role | Authenticated User.'),
         '#options' => $this->getAuthOptions(),
         '#default_value' => $this->getOption('auth'),
-      );
+      ];
     }
   }
 
@@ -406,7 +406,7 @@ public function execute() {
    * {@inheritdoc}
    */
   public function render() {
-    $build = array();
+    $build = [];
     $build['#markup'] = $this->renderer->executeInRenderContext(new RenderContext(), function() {
       return $this->view->style_plugin->render();
     });
diff --git a/core/modules/rest/src/Plugin/views/row/DataFieldRow.php b/core/modules/rest/src/Plugin/views/row/DataFieldRow.php
index 8cebb738d1151d17d4c541450905b9ae41071782..175db17b5c0343b5cc420b882381922c6e48afcd 100644
--- a/core/modules/rest/src/Plugin/views/row/DataFieldRow.php
+++ b/core/modules/rest/src/Plugin/views/row/DataFieldRow.php
@@ -31,14 +31,14 @@ class DataFieldRow extends RowPluginBase {
    *
    * @var array
    */
-  protected $replacementAliases = array();
+  protected $replacementAliases = [];
 
   /**
    * Stores an array of options to determine if the raw field output is used.
    *
    * @var array
    */
-  protected $rawOutputOptions = array();
+  protected $rawOutputOptions = [];
 
   /**
    * {@inheritdoc}
@@ -61,7 +61,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['field_options'] = array('default' => array());
+    $options['field_options'] = ['default' => []];
 
     return $options;
   }
@@ -72,12 +72,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['field_options'] = array(
+    $form['field_options'] = [
       '#type' => 'table',
-      '#header' => array($this->t('Field'), $this->t('Alias'), $this->t('Raw output')),
+      '#header' => [$this->t('Field'), $this->t('Alias'), $this->t('Raw output')],
       '#empty' => $this->t('You have no fields. Add some to your view.'),
       '#tree' => TRUE,
-    );
+    ];
 
     $options = $this->options['field_options'];
 
@@ -87,22 +87,22 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         if (!empty($field['exclude'])) {
           continue;
         }
-        $form['field_options'][$id]['field'] = array(
+        $form['field_options'][$id]['field'] = [
           '#markup' => $id,
-        );
-        $form['field_options'][$id]['alias'] = array(
-          '#title' => $this->t('Alias for @id', array('@id' => $id)),
+        ];
+        $form['field_options'][$id]['alias'] = [
+          '#title' => $this->t('Alias for @id', ['@id' => $id]),
           '#title_display' => 'invisible',
           '#type' => 'textfield',
           '#default_value' => isset($options[$id]['alias']) ? $options[$id]['alias'] : '',
-          '#element_validate' => array(array($this, 'validateAliasName')),
-        );
-        $form['field_options'][$id]['raw_output'] = array(
-          '#title' => $this->t('Raw output for @id', array('@id' => $id)),
+          '#element_validate' => [[$this, 'validateAliasName']],
+        ];
+        $form['field_options'][$id]['raw_output'] = [
+          '#title' => $this->t('Raw output for @id', ['@id' => $id]),
           '#title_display' => 'invisible',
           '#type' => 'checkbox',
           '#default_value' => isset($options[$id]['raw_output']) ? $options[$id]['raw_output'] : '',
-        );
+        ];
       }
     }
   }
@@ -121,7 +121,7 @@ public function validateAliasName($element, FormStateInterface $form_state) {
    */
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
     // Collect an array of aliases to validate.
-    $aliases = static::extractFromOptionsArray('alias', $form_state->getValue(array('row_options', 'field_options')));
+    $aliases = static::extractFromOptionsArray('alias', $form_state->getValue(['row_options', 'field_options']));
 
     // If array filter returns empty, no values have been entered. Unique keys
     // should only be validated if we have some.
@@ -134,7 +134,7 @@ public function validateOptionsForm(&$form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function render($row) {
-    $output = array();
+    $output = [];
 
     foreach ($this->view->field as $id => $field) {
       // If the raw output option has been set, just get the raw value.
diff --git a/core/modules/rest/src/Plugin/views/style/Serializer.php b/core/modules/rest/src/Plugin/views/style/Serializer.php
index 7e9b4331ef0099e015fa14352917ca7cf37f918b..895b9fe1ae9f3e8e3188522c310a1048b4ba4261 100644
--- a/core/modules/rest/src/Plugin/views/style/Serializer.php
+++ b/core/modules/rest/src/Plugin/views/style/Serializer.php
@@ -45,7 +45,7 @@ class Serializer extends StylePluginBase implements CacheableDependencyInterface
    *
    * @var array
    */
-  protected $formats = array();
+  protected $formats = [];
 
   /**
    * The serialization format providers, keyed by format.
@@ -85,7 +85,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['formats'] = array('default' => array());
+    $options['formats'] = ['default' => []];
 
     return $options;
   }
@@ -96,13 +96,13 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['formats'] = array(
+    $form['formats'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Accepted request formats'),
       '#description' => $this->t('Request formats that will be allowed in responses. If none are selected all formats will be allowed.'),
       '#options' => $this->getFormatOptions(),
       '#default_value' => $this->options['formats'],
-    );
+    ];
   }
 
   /**
@@ -111,15 +111,15 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
   public function submitOptionsForm(&$form, FormStateInterface $form_state) {
     parent::submitOptionsForm($form, $form_state);
 
-    $formats = $form_state->getValue(array('style_options', 'formats'));
-    $form_state->setValue(array('style_options', 'formats'), array_filter($formats));
+    $formats = $form_state->getValue(['style_options', 'formats']);
+    $form_state->setValue(['style_options', 'formats'], array_filter($formats));
   }
 
   /**
    * {@inheritdoc}
    */
   public function render() {
-    $rows = array();
+    $rows = [];
     // If the Data Entity row plugin is used, this will be an array of entities
     // which will pass through Serializer to one of the registered Normalizers,
     // which will transform it to arrays/scalars. If the Data field row plugin
diff --git a/core/modules/rest/src/RequestHandler.php b/core/modules/rest/src/RequestHandler.php
index 494b438cdbb4e0dace94adc14844819b4cbee80e..9f5137905b271956b87491d5c69417ee66d8f73a 100644
--- a/core/modules/rest/src/RequestHandler.php
+++ b/core/modules/rest/src/RequestHandler.php
@@ -131,7 +131,7 @@ public function handle(RouteMatchInterface $route_match, Request $request) {
     // Determine the request parameters that should be passed to the resource
     // plugin.
     $route_parameters = $route_match->getParameters();
-    $parameters = array();
+    $parameters = [];
     // Filter out all internal parameters starting with "_".
     foreach ($route_parameters as $key => $parameter) {
       if ($key{0} !== '_') {
@@ -140,7 +140,7 @@ public function handle(RouteMatchInterface $route_match, Request $request) {
     }
 
     // Invoke the operation on the resource plugin.
-    $response = call_user_func_array(array($resource, $method), array_merge($parameters, array($unserialized, $request)));
+    $response = call_user_func_array([$resource, $method], array_merge($parameters, [$unserialized, $request]));
 
     if ($response instanceof CacheableResponseInterface) {
       // Add rest config's cache tags.
diff --git a/core/modules/rest/src/ResourceResponse.php b/core/modules/rest/src/ResourceResponse.php
index d4279a4c97cc3ffc5c7581c85ea7d0f47c71933f..eb955c293c28b52cac77c5cc252dec98810dfbb4 100644
--- a/core/modules/rest/src/ResourceResponse.php
+++ b/core/modules/rest/src/ResourceResponse.php
@@ -31,7 +31,7 @@ class ResourceResponse extends Response implements CacheableResponseInterface, R
    * @param array $headers
    *   An array of response headers.
    */
-  public function __construct($data = NULL, $status = 200, $headers = array()) {
+  public function __construct($data = NULL, $status = 200, $headers = []) {
     $this->responseData = $data;
     parent::__construct('', $status, $headers);
   }
diff --git a/core/modules/rest/src/Routing/ResourceRoutes.php b/core/modules/rest/src/Routing/ResourceRoutes.php
index 8aedfba59ebdd67ab96287e09a7c51589ebaf4ba..3151420201b653d478638d1c0b44b75b92c8b2c5 100644
--- a/core/modules/rest/src/Routing/ResourceRoutes.php
+++ b/core/modules/rest/src/Routing/ResourceRoutes.php
@@ -95,13 +95,13 @@ protected function getRoutesForResourceConfig(RestResourceConfigInterface $rest_
 
         // Check that authentication providers are defined.
         if (empty($rest_resource_config->getAuthenticationProviders($method))) {
-          $this->logger->error('At least one authentication provider must be defined for resource @id', array(':id' => $rest_resource_config->id()));
+          $this->logger->error('At least one authentication provider must be defined for resource @id', [':id' => $rest_resource_config->id()]);
           continue;
         }
 
         // Check that formats are defined.
         if (empty($rest_resource_config->getFormats($method))) {
-          $this->logger->error('At least one format must be defined for resource @id', array(':id' => $rest_resource_config->id()));
+          $this->logger->error('At least one format must be defined for resource @id', [':id' => $rest_resource_config->id()]);
           continue;
         }
 
diff --git a/core/modules/rest/src/Tests/RESTTestBase.php b/core/modules/rest/src/Tests/RESTTestBase.php
index 405493bccb71c7edfabbce1fb99ec80ca562d5a9..40a9fe2f30ee5fd005b469b8036e45e9acf97f27 100644
--- a/core/modules/rest/src/Tests/RESTTestBase.php
+++ b/core/modules/rest/src/Tests/RESTTestBase.php
@@ -65,7 +65,7 @@ abstract class RESTTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('rest', 'entity_test');
+  public static $modules = ['rest', 'entity_test'];
 
   /**
    * The last response.
@@ -78,11 +78,11 @@ protected function setUp() {
     parent::setUp();
     $this->defaultFormat = 'hal_json';
     $this->defaultMimeType = 'application/hal+json';
-    $this->defaultAuth = array('cookie');
+    $this->defaultAuth = ['cookie'];
     $this->resourceConfigStorage = $this->container->get('entity_type.manager')->getStorage('rest_resource_config');
     // Create a test content type for node testing.
     if (in_array('node', static::$modules)) {
-      $this->drupalCreateContentType(array('name' => 'resttest', 'type' => 'resttest'));
+      $this->drupalCreateContentType(['name' => 'resttest', 'type' => 'resttest']);
     }
 
     $this->cookieFile = $this->publicFilesDirectory . '/cookie.jar';
@@ -142,7 +142,7 @@ protected function httpRequest($url, $method, $body = NULL, $mime_type = NULL, $
     if (!isset($mime_type)) {
       $mime_type = $this->defaultMimeType;
     }
-    if (!in_array($method, array('GET', 'HEAD', 'OPTIONS', 'TRACE'))) {
+    if (!in_array($method, ['GET', 'HEAD', 'OPTIONS', 'TRACE'])) {
       // GET the CSRF token first for writing requests.
       $requested_token = $this->drupalGet('session/token');
     }
@@ -303,28 +303,28 @@ protected function entityCreate($entity_type) {
   protected function entityValues($entity_type_id) {
     switch ($entity_type_id) {
       case 'entity_test':
-        return array(
+        return [
           'name' => $this->randomMachineName(),
           'user_id' => 1,
-          'field_test_text' => array(0 => array(
+          'field_test_text' => [0 => [
             'value' => $this->randomString(),
             'format' => 'plain_text',
-          )),
-        );
+          ]],
+        ];
       case 'config_test':
         return [
           'id' => $this->randomMachineName(),
           'label' => 'Test label',
         ];
       case 'node':
-        return array('title' => $this->randomString(), 'type' => 'resttest');
+        return ['title' => $this->randomString(), 'type' => 'resttest'];
       case 'node_type':
-        return array(
+        return [
           'type' => 'article',
           'name' => $this->randomMachineName(),
-        );
+        ];
       case 'user':
-        return array('name' => $this->randomMachineName());
+        return ['name' => $this->randomMachineName()];
 
       case 'comment':
         return [
@@ -353,7 +353,7 @@ protected function entityValues($entity_type_id) {
         if ($this->isConfigEntity($entity_type_id)) {
           return $this->configEntityValues($entity_type_id);
         }
-        return array();
+        return [];
     }
   }
 
@@ -460,22 +460,22 @@ protected function entityPermissions($entity_type_id, $operation) {
       case 'entity_test':
         switch ($operation) {
           case 'view':
-            return array('view test entity');
+            return ['view test entity'];
           case 'create':
           case 'update':
           case 'delete':
-            return array('administer entity_test content');
+            return ['administer entity_test content'];
         }
       case 'node':
         switch ($operation) {
           case 'view':
-            return array('access content');
+            return ['access content'];
           case 'create':
-            return array('create resttest content');
+            return ['create resttest content'];
           case 'update':
-            return array('edit any resttest content');
+            return ['edit any resttest content'];
           case 'delete':
-            return array('delete any resttest content');
+            return ['delete any resttest content'];
         }
 
       case 'comment':
@@ -573,7 +573,7 @@ protected function removeNodeFieldsForNonAdminUsers(NodeInterface $node) {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertResponseBody($expected, $message = '', $group = 'REST Response') {
-    return $this->assertIdentical($expected, $this->responseBody, $message ? $message : strtr('Response body @expected (expected) is equal to @response (actual).', array('@expected' => var_export($expected, TRUE), '@response' => var_export($this->responseBody, TRUE))), $group);
+    return $this->assertIdentical($expected, $this->responseBody, $message ? $message : strtr('Response body @expected (expected) is equal to @response (actual).', ['@expected' => var_export($expected, TRUE), '@response' => var_export($this->responseBody, TRUE)]), $group);
   }
 
   /**
diff --git a/core/modules/rest/src/Tests/ResourceTest.php b/core/modules/rest/src/Tests/ResourceTest.php
index 72bed0f4ee738437f1478cf233f03a09be9de631..baf91e9aef3c453f334fa042f4a101dfc810abb8 100644
--- a/core/modules/rest/src/Tests/ResourceTest.php
+++ b/core/modules/rest/src/Tests/ResourceTest.php
@@ -19,7 +19,7 @@ class ResourceTest extends RESTTestBase {
    *
    * @var array
    */
-  public static $modules = array('hal', 'rest', 'entity_test', 'rest_test');
+  public static $modules = ['hal', 'rest', 'entity_test', 'rest_test'];
 
   /**
    * The entity.
diff --git a/core/modules/rest/src/Tests/Views/StyleSerializerTest.php b/core/modules/rest/src/Tests/Views/StyleSerializerTest.php
index 4c004fcafcdd673b7c212ad4f26fff7e209afc74..3c751b651a3723ba5714337f20654b1146417e1e 100644
--- a/core/modules/rest/src/Tests/Views/StyleSerializerTest.php
+++ b/core/modules/rest/src/Tests/Views/StyleSerializerTest.php
@@ -40,14 +40,14 @@ class StyleSerializerTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'entity_test', 'hal', 'rest_test_views', 'node', 'text', 'field', 'language', 'basic_auth');
+  public static $modules = ['views_ui', 'entity_test', 'hal', 'rest_test_views', 'node', 'text', 'field', 'language', 'basic_auth'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_serializer_display_field', 'test_serializer_display_entity', 'test_serializer_display_entity_translated', 'test_serializer_node_display_field', 'test_serializer_node_exposed_filter');
+  public static $testViews = ['test_serializer_display_field', 'test_serializer_display_entity', 'test_serializer_display_entity_translated', 'test_serializer_node_display_field', 'test_serializer_node_exposed_filter'];
 
   /**
    * A user with administrative privileges to look at test entity and configure views.
@@ -57,13 +57,13 @@ class StyleSerializerTest extends PluginTestBase {
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('rest_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['rest_test_views']);
 
-    $this->adminUser = $this->drupalCreateUser(array('administer views', 'administer entity_test content', 'access user profiles', 'view test entity'));
+    $this->adminUser = $this->drupalCreateUser(['administer views', 'administer entity_test content', 'access user profiles', 'view test entity']);
 
     // Save some entity_test entities.
     for ($i = 1; $i <= 10; $i++) {
-      EntityTest::create(array('name' => 'test_' . $i, 'user_id' => $this->adminUser->id()))->save();
+      EntityTest::create(['name' => 'test_' . $i, 'user_id' => $this->adminUser->id()])->save();
     }
 
     $this->enableViewsTestModule();
@@ -122,9 +122,9 @@ public function testSerializerResponses() {
     $headers = $this->drupalGetHeaders();
     $this->assertEqual($headers['content-type'], 'application/json', 'The header Content-type is correct.');
 
-    $expected = array();
+    $expected = [];
     foreach ($view->result as $row) {
-      $expected_row = array();
+      $expected_row = [];
       foreach ($view->field as $id => $field) {
         $expected_row[$id] = $field->render($row);
       }
@@ -154,7 +154,7 @@ public function testSerializerResponses() {
     // Get the serializer service.
     $serializer = $this->container->get('serializer');
 
-    $entities = array();
+    $entities = [];
     foreach ($view->result as $row) {
       $entities[] = $row->_entity;
     }
@@ -180,15 +180,15 @@ public function testSerializerResponses() {
 
     // Change the default format to xml.
     $view->setDisplay('rest_export_1');
-    $view->getDisplay()->setOption('style', array(
+    $view->getDisplay()->setOption('style', [
       'type' => 'serializer',
-      'options' => array(
+      'options' => [
         'uses_fields' => FALSE,
-        'formats' => array(
+        'formats' => [
           'xml' => 'xml',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $view->save();
     $expected = $serializer->serialize($entities, 'xml');
     $actual_xml = $this->drupalGet('test/serialize/entity');
@@ -197,16 +197,16 @@ public function testSerializerResponses() {
 
     // Allow multiple formats.
     $view->setDisplay('rest_export_1');
-    $view->getDisplay()->setOption('style', array(
+    $view->getDisplay()->setOption('style', [
       'type' => 'serializer',
-      'options' => array(
+      'options' => [
         'uses_fields' => FALSE,
-        'formats' => array(
+        'formats' => [
           'xml' => 'xml',
           'json' => 'json',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $view->save();
     $expected = $serializer->serialize($entities, 'json');
     $actual_json = $this->drupalGetWithFormat('test/serialize/entity', 'json');
@@ -346,8 +346,8 @@ public function testResponseFormatConfiguration() {
     $style_options = 'admin/structure/views/nojs/display/test_serializer_display_field/rest_export_1/style_options';
 
     // Select only 'xml' as an accepted format.
-    $this->drupalPostForm($style_options, array('style_options[formats][xml]' => 'xml'), t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm($style_options, ['style_options[formats][xml]' => 'xml'], t('Apply'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Should return a 406.
     $this->drupalGetWithFormat('test/serialize/field', 'json');
@@ -359,8 +359,8 @@ public function testResponseFormatConfiguration() {
     $this->assertResponse(200, 'A 200 response was returned when XML was requested.');
 
     // Add 'json' as an accepted format, so we have multiple.
-    $this->drupalPostForm($style_options, array('style_options[formats][json]' => 'json'), t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm($style_options, ['style_options[formats][json]' => 'json'], t('Apply'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Should return a 200.
     // @todo This should be fixed when we have better content negotiation.
@@ -369,7 +369,7 @@ public function testResponseFormatConfiguration() {
     $this->assertResponse(200, 'A 200 response was returned when any format was requested.');
 
     // Should return a 200. Emulates a sample Firefox header.
-    $this->drupalGet('test/serialize/field', array(), array('Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8'));
+    $this->drupalGet('test/serialize/field', [], ['Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8']);
     $this->assertHeader('content-type', 'application/json');
     $this->assertResponse(200, 'A 200 response was returned when a browser accept header was requested.');
 
@@ -393,7 +393,7 @@ public function testResponseFormatConfiguration() {
     $this->assertResponse(200, 'A 200 response was returned when HTML was requested.');
 
     // Now configure now format, so all of them should be allowed.
-    $this->drupalPostForm($style_options, array('style_options[formats][json]' => '0', 'style_options[formats][xml]' => '0'), t('Apply'));
+    $this->drupalPostForm($style_options, ['style_options[formats][json]' => '0', 'style_options[formats][xml]' => '0'], t('Apply'));
 
     // Should return a 200.
     $this->drupalGetWithFormat('test/serialize/field', 'json');
@@ -424,16 +424,16 @@ public function testUIFieldAlias() {
 
     // Test an empty string for an alias, this should not be used. This also
     // tests that the form can be submitted with no aliases.
-    $this->drupalPostForm($row_options, array('row_options[field_options][name][alias]' => ''), t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm($row_options, ['row_options[field_options][name][alias]' => ''], t('Apply'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $view = Views::getView('test_serializer_display_field');
     $view->setDisplay('rest_export_1');
     $this->executeView($view);
 
-    $expected = array();
+    $expected = [];
     foreach ($view->result as $row) {
-      $expected_row = array();
+      $expected_row = [];
       foreach ($view->field as $id => $field) {
         $expected_row[$id] = $field->render($row);
       }
@@ -443,32 +443,32 @@ public function testUIFieldAlias() {
     $this->assertIdentical($this->drupalGetJSON('test/serialize/field'), $this->castSafeStrings($expected));
 
     // Test a random aliases for fields, they should be replaced.
-    $alias_map = array(
+    $alias_map = [
       'name' => $this->randomMachineName(),
       // Use # to produce an invalid character for the validation.
       'nothing' => '#' . $this->randomMachineName(),
       'created' => 'created',
-    );
+    ];
 
-    $edit = array('row_options[field_options][name][alias]' => $alias_map['name'], 'row_options[field_options][nothing][alias]' => $alias_map['nothing']);
+    $edit = ['row_options[field_options][name][alias]' => $alias_map['name'], 'row_options[field_options][nothing][alias]' => $alias_map['nothing']];
     $this->drupalPostForm($row_options, $edit, t('Apply'));
     $this->assertText(t('The machine-readable name must contain only letters, numbers, dashes and underscores.'));
 
     // Change the map alias value to a valid one.
     $alias_map['nothing'] = $this->randomMachineName();
 
-    $edit = array('row_options[field_options][name][alias]' => $alias_map['name'], 'row_options[field_options][nothing][alias]' => $alias_map['nothing']);
+    $edit = ['row_options[field_options][name][alias]' => $alias_map['name'], 'row_options[field_options][nothing][alias]' => $alias_map['nothing']];
     $this->drupalPostForm($row_options, $edit, t('Apply'));
 
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $view = Views::getView('test_serializer_display_field');
     $view->setDisplay('rest_export_1');
     $this->executeView($view);
 
-    $expected = array();
+    $expected = [];
     foreach ($view->result as $row) {
-      $expected_row = array();
+      $expected_row = [];
       foreach ($view->field as $id => $field) {
         $expected_row[$alias_map[$id]] = $field->render($row);
       }
@@ -491,12 +491,12 @@ public function testFieldRawOutput() {
 
     // Test an empty string for an alias, this should not be used. This also
     // tests that the form can be submitted with no aliases.
-    $values = array(
+    $values = [
       'row_options[field_options][created][raw_output]' => '1',
       'row_options[field_options][name][raw_output]' => '1',
-    );
+    ];
     $this->drupalPostForm($row_options, $values, t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $view = Views::getView('test_serializer_display_field');
     $view->setDisplay('rest_export_1');
@@ -562,7 +562,7 @@ public function testLivePreview() {
     // Get the serializer service.
     $serializer = $this->container->get('serializer');
 
-    $entities = array();
+    $entities = [];
     foreach ($view->result as $row) {
       $entities[] = $row->_entity;
     }
@@ -580,15 +580,15 @@ public function testLivePreview() {
 
     // Change the request format to xml.
     $view->setDisplay('rest_export_1');
-    $view->getDisplay()->setOption('style', array(
+    $view->getDisplay()->setOption('style', [
       'type' => 'serializer',
-      'options' => array(
+      'options' => [
         'uses_fields' => FALSE,
-        'formats' => array(
+        'formats' => [
           'xml' => 'xml',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     $this->executeView($view);
     $build = $view->preview();
@@ -602,7 +602,7 @@ public function testLivePreview() {
   public function testSerializerViewsUI() {
     $this->drupalLogin($this->adminUser);
     // Click the "Update preview button".
-    $this->drupalPostForm('admin/structure/views/view/test_serializer_display_field/edit/rest_export_1', $edit = array(), t('Update preview'));
+    $this->drupalPostForm('admin/structure/views/view/test_serializer_display_field/edit/rest_export_1', $edit = [], t('Update preview'));
     $this->assertResponse(200);
     // Check if we receive the expected result.
     $result = $this->xpath('//div[@id="views-live-preview"]/pre');
@@ -613,7 +613,7 @@ public function testSerializerViewsUI() {
    * Tests the field row style using fieldapi fields.
    */
   public function testFieldapiField() {
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     $node = $this->drupalCreateNode();
 
     $result = $this->drupalGetJSON('test/serialize/node-field');
@@ -749,44 +749,44 @@ public function testGroupRows() {
    * the value provided.
    */
   public function testRestViewExposedFilter() {
-    $this->drupalCreateContentType(array('type' => 'page'));
-    $node0 = $this->drupalCreateNode(array('title' => 'Node 1'));
-    $node1 = $this->drupalCreateNode(array('title' => 'Node 11'));
-    $node2 = $this->drupalCreateNode(array('title' => 'Node 111'));
+    $this->drupalCreateContentType(['type' => 'page']);
+    $node0 = $this->drupalCreateNode(['title' => 'Node 1']);
+    $node1 = $this->drupalCreateNode(['title' => 'Node 11']);
+    $node2 = $this->drupalCreateNode(['title' => 'Node 111']);
 
     // Test that no filter brings back all three nodes.
     $result = $this->drupalGetJSON('test/serialize/node-exposed-filter');
 
-    $expected = array(
-      0 => array(
+    $expected = [
+      0 => [
         'nid' => $node0->id(),
         'body' => $node0->body->processed,
-      ),
-      1 => array(
+      ],
+      1 => [
         'nid' => $node1->id(),
         'body' => $node1->body->processed,
-      ),
-      2 => array(
+      ],
+      2 => [
         'nid' => $node2->id(),
         'body' => $node2->body->processed,
-      ),
-    );
+      ],
+    ];
 
     $this->assertEqual($result, $expected, 'Querying a view with no exposed filter returns all nodes.');
 
     // Test that title starts with 'Node 11' query finds 2 of the 3 nodes.
     $result = $this->drupalGetJSON('test/serialize/node-exposed-filter', ['query' => ['title' => 'Node 11']]);
 
-    $expected = array(
-      0 => array(
+    $expected = [
+      0 => [
         'nid' => $node1->id(),
         'body' => $node1->body->processed,
-      ),
-      1 => array(
+      ],
+      1 => [
         'nid' => $node2->id(),
         'body' => $node2->body->processed,
-      ),
-    );
+      ],
+    ];
 
     $cache_contexts = [
       'languages:language_content',
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/Comment/CommentResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/Comment/CommentResourceTestBase.php
index 8b3ea643f30801a81df5cdfdc0c9d2eb9713a7f4..b46eec9eac4ef82753891cc455cf19e4a6b4ae49 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/Comment/CommentResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/Comment/CommentResourceTestBase.php
@@ -87,10 +87,10 @@ protected function createEntity() {
     $this->addDefaultCommentField('entity_test', 'bar', 'comment');
 
     // Create a "Camelids" test entity that the comment will be assigned to.
-    $commented_entity = EntityTest::create(array(
+    $commented_entity = EntityTest::create([
       'name' => 'Camelids',
       'type' => 'bar',
-    ));
+    ]);
     $commented_entity->save();
 
     // Create a "Llama" comment.
diff --git a/core/modules/rest/tests/src/Unit/CollectRoutesTest.php b/core/modules/rest/tests/src/Unit/CollectRoutesTest.php
index c55ea3bbf3475baa1cd266a5594b7c40fb8fff3a..3ed6545316dc0a3740bf52a37973821e1d71099a 100644
--- a/core/modules/rest/tests/src/Unit/CollectRoutesTest.php
+++ b/core/modules/rest/tests/src/Unit/CollectRoutesTest.php
@@ -39,18 +39,18 @@ protected function setUp() {
       ->disableOriginalConstructor()
       ->getMock();
 
-    $this->view = $this->getMock('\Drupal\views\Entity\View', array('initHandlers'), array(
-      array('id' => 'test_view'),
+    $this->view = $this->getMock('\Drupal\views\Entity\View', ['initHandlers'], [
+      ['id' => 'test_view'],
       'view',
-    ));
+    ]);
 
-    $view_executable = $this->getMock('\Drupal\views\ViewExecutable', array('initHandlers', 'getTitle'), array(), '', FALSE);
+    $view_executable = $this->getMock('\Drupal\views\ViewExecutable', ['initHandlers', 'getTitle'], [], '', FALSE);
     $view_executable->expects($this->any())
       ->method('getTitle')
       ->willReturn('View title');
 
     $view_executable->storage = $this->view;
-    $view_executable->argument = array();
+    $view_executable->argument = [];
 
     $display_manager = $this->getMockBuilder('\Drupal\views\Plugin\ViewsPluginManager')
       ->disableOriginalConstructor()
@@ -86,21 +86,21 @@ protected function setUp() {
 
     \Drupal::setContainer($container);
 
-    $this->restExport = RestExport::create($container, array(), "test_routes", array());
+    $this->restExport = RestExport::create($container, [], "test_routes", []);
     $this->restExport->view = $view_executable;
 
     // Initialize a display.
-    $this->restExport->display = array('id' => 'page_1');
+    $this->restExport->display = ['id' => 'page_1'];
 
     // Set the style option.
-    $this->restExport->setOption('style', array('type' => 'serializer'));
+    $this->restExport->setOption('style', ['type' => 'serializer']);
 
     // Set the auth option.
     $this->restExport->setOption('auth', ['basic_auth']);
 
     $display_manager->expects($this->once())
       ->method('getDefinition')
-      ->will($this->returnValue(array('id' => 'test', 'provider' => 'test')));
+      ->will($this->returnValue(['id' => 'test', 'provider' => 'test']));
 
     $none = $this->getMockBuilder('\Drupal\views\Plugin\views\access\None')
       ->disableOriginalConstructor()
@@ -110,11 +110,11 @@ protected function setUp() {
       ->method('createInstance')
       ->will($this->returnValue($none));
 
-    $style_plugin = $this->getMock('\Drupal\rest\Plugin\views\style\Serializer', array('getFormats', 'init'), array(), '', FALSE);
+    $style_plugin = $this->getMock('\Drupal\rest\Plugin\views\style\Serializer', ['getFormats', 'init'], [], '', FALSE);
 
     $style_plugin->expects($this->once())
       ->method('getFormats')
-      ->will($this->returnValue(array('json')));
+      ->will($this->returnValue(['json']));
 
     $style_plugin->expects($this->once())
       ->method('init')
diff --git a/core/modules/search/search.install b/core/modules/search/search.install
index f920aa5ae99fb78507993967d0aada5ab5059941..d55c4d2f03a26ea04f353377d4329aafa4762561 100644
--- a/core/modules/search/search.install
+++ b/core/modules/search/search.install
@@ -9,116 +9,116 @@
  * Implements hook_schema().
  */
 function search_schema() {
-  $schema['search_dataset'] = array(
+  $schema['search_dataset'] = [
     'description' => 'Stores items that will be searched.',
-    'fields' => array(
-      'sid' => array(
+    'fields' => [
+      'sid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'Search item ID, e.g. node ID for nodes.',
-      ),
-      'langcode' => array(
+      ],
+      'langcode' => [
         'type' => 'varchar_ascii',
         'length' => '12',
         'not null' => TRUE,
         'description' => 'The {languages}.langcode of the item variant.',
         'default' => '',
-      ),
-      'type' => array(
+      ],
+      'type' => [
         'type' => 'varchar_ascii',
         'length' => 64,
         'not null' => TRUE,
         'description' => 'Type of item, e.g. node.',
-      ),
-      'data' => array(
+      ],
+      'data' => [
         'type' => 'text',
         'not null' => TRUE,
         'size' => 'big',
         'description' => 'List of space-separated words from the item.',
-      ),
-      'reindex' => array(
+      ],
+      'reindex' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'Set to force node reindexing.',
-      ),
-    ),
-    'primary key' => array('sid', 'langcode', 'type'),
-  );
+      ],
+    ],
+    'primary key' => ['sid', 'langcode', 'type'],
+  ];
 
-  $schema['search_index'] = array(
+  $schema['search_index'] = [
     'description' => 'Stores the search index, associating words, items and scores.',
-    'fields' => array(
-      'word' => array(
+    'fields' => [
+      'word' => [
         'type' => 'varchar',
         'length' => 50,
         'not null' => TRUE,
         'default' => '',
         'description' => 'The {search_total}.word that is associated with the search item.',
-      ),
-      'sid' => array(
+      ],
+      'sid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The {search_dataset}.sid of the searchable item to which the word belongs.',
-      ),
-      'langcode' => array(
+      ],
+      'langcode' => [
         'type' => 'varchar_ascii',
         'length' => '12',
         'not null' => TRUE,
         'description' => 'The {languages}.langcode of the item variant.',
         'default' => '',
-      ),
-      'type' => array(
+      ],
+      'type' => [
         'type' => 'varchar_ascii',
         'length' => 64,
         'not null' => TRUE,
         'description' => 'The {search_dataset}.type of the searchable item to which the word belongs.',
-      ),
-      'score' => array(
+      ],
+      'score' => [
         'type' => 'float',
         'not null' => FALSE,
         'description' => 'The numeric score of the word, higher being more important.',
-      ),
-    ),
-    'indexes' => array(
-      'sid_type' => array('sid', 'langcode', 'type'),
-    ),
-    'foreign keys' => array(
-      'search_dataset' => array(
+      ],
+    ],
+    'indexes' => [
+      'sid_type' => ['sid', 'langcode', 'type'],
+    ],
+    'foreign keys' => [
+      'search_dataset' => [
         'table' => 'search_dataset',
-        'columns' => array(
+        'columns' => [
           'sid' => 'sid',
           'langcode' => 'langcode',
           'type' => 'type',
-        ),
-      ),
-    ),
-    'primary key' => array('word', 'sid', 'langcode', 'type'),
-  );
+        ],
+      ],
+    ],
+    'primary key' => ['word', 'sid', 'langcode', 'type'],
+  ];
 
-  $schema['search_total'] = array(
+  $schema['search_total'] = [
     'description' => 'Stores search totals for words.',
-    'fields' => array(
-      'word' => array(
+    'fields' => [
+      'word' => [
         'description' => 'Primary Key: Unique word in the search index.',
         'type' => 'varchar',
         'length' => 50,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'count' => array(
+      ],
+      'count' => [
         'description' => "The count of the word in the index using Zipf's law to equalize the probability distribution.",
         'type' => 'float',
         'not null' => FALSE,
-      ),
-    ),
-    'primary key' => array('word'),
-  );
+      ],
+    ],
+    'primary key' => ['word'],
+  ];
 
   return $schema;
 }
@@ -129,7 +129,7 @@ function search_schema() {
  * For the Status Report, return information about search index status.
  */
 function search_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
 
   if ($phase == 'runtime') {
     $remaining = 0;
@@ -145,11 +145,11 @@ function search_requirements($phase) {
     // Use floor() to calculate the percentage, so if it is not quite 100%, it
     // will show as 99%, to indicate "almost done".
     $percent = ($total > 0 ? floor(100 * $done / $total) : 100);
-    $requirements['search_status'] = array(
+    $requirements['search_status'] = [
       'title' => t('Search index progress'),
-      'value' => t('@percent% (@remaining remaining)', array('@percent' => $percent, '@remaining' => $remaining)),
+      'value' => t('@percent% (@remaining remaining)', ['@percent' => $percent, '@remaining' => $remaining]),
       'severity' => REQUIREMENT_INFO,
-    );
+    ];
   }
 
   return $requirements;
diff --git a/core/modules/search/search.module b/core/modules/search/search.module
index 215a6c8d10839bf649d3aa753ed61960fec8d171..ae99a8731ef388d20aefa181f3de1940b8465aae 100644
--- a/core/modules/search/search.module
+++ b/core/modules/search/search.module
@@ -75,20 +75,20 @@ function search_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.search':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Search module provides the ability to set up search pages based on plugins provided by other modules. In Drupal core, there are two page-type plugins: the Content page type provides keyword searching for content managed by the Node module, and the Users page type provides keyword searching for registered users. Contributed modules may provide other page-type plugins. For more information, see the <a href=":search-module">online documentation for the Search module</a>.', array(':search-module' => 'https://www.drupal.org/documentation/modules/search')) . '</p>';
+      $output .= '<p>' . t('The Search module provides the ability to set up search pages based on plugins provided by other modules. In Drupal core, there are two page-type plugins: the Content page type provides keyword searching for content managed by the Node module, and the Users page type provides keyword searching for registered users. Contributed modules may provide other page-type plugins. For more information, see the <a href=":search-module">online documentation for the Search module</a>.', [':search-module' => 'https://www.drupal.org/documentation/modules/search']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Configuring search pages') . '</dt>';
-      $output .= '<dd>' . t('To configure search pages, visit the <a href=":search-settings">Search pages page</a>. In the Search pages section, you can add a new search page, edit the configuration of existing search pages, enable and disable search pages, and choose the default search page. Each enabled search page has a URL path starting with <em>search</em>, and each will appear as a tab or local task link on the <a href=":search-url">search page</a>; you can configure the text that is shown in the tab. In addition, some search page plugins have additional settings that you can configure for each search page.', array(':search-settings' => \Drupal::url('entity.search_page.collection'), ':search-url' => \Drupal::url('search.view'))) . '</dd>';
+      $output .= '<dd>' . t('To configure search pages, visit the <a href=":search-settings">Search pages page</a>. In the Search pages section, you can add a new search page, edit the configuration of existing search pages, enable and disable search pages, and choose the default search page. Each enabled search page has a URL path starting with <em>search</em>, and each will appear as a tab or local task link on the <a href=":search-url">search page</a>; you can configure the text that is shown in the tab. In addition, some search page plugins have additional settings that you can configure for each search page.', [':search-settings' => \Drupal::url('entity.search_page.collection'), ':search-url' => \Drupal::url('search.view')]) . '</dd>';
       $output .= '<dt>' . t('Managing the search index') . '</dt>';
-      $output .= '<dd>' . t('Some search page plugins, such as the core Content search page, index searchable text using the Drupal core search index, and will not work unless content is indexed. Indexing is done during <em>cron</em> runs, so it requires a <a href=":cron">cron maintenance task</a> to be set up. There are also several settings affecting indexing that can be configured on the <a href=":search-settings">Search pages page</a>: the number of items to index per cron run, the minimum word length to index, and how to handle Chinese, Japanese, and Korean characters.', array(':cron' => \Drupal::url('system.cron_settings'), ':search-settings' => \Drupal::url('entity.search_page.collection'))) . '</dd>';
-      $output .= '<dd>' . t('Modules providing search page plugins generally ensure that content-related actions on your site (creating, editing, or deleting content and comments) automatically cause affected content items to be marked for indexing or reindexing at the next cron run. When content is marked for reindexing, the previous content remains in the index until cron runs, at which time it is replaced by the new content. However, there are some actions related to the structure of your site that do not cause affected content to be marked for reindexing. Examples of structure-related actions that affect content include deleting or editing taxonomy terms, enabling or disabling modules that add text to content (such as Taxonomy, Comment, and field-providing modules), and modifying the fields or display parameters of your content types. If you take one of these actions and you want to ensure that the search index is updated to reflect your changed site structure, you can mark all content for reindexing by clicking the "Re-index site" button on the <a href=":search-settings">Search pages page</a>. If you have a lot of content on your site, it may take several cron runs for the content to be reindexed.', array(':search-settings' => \Drupal::url('entity.search_page.collection'))) . '</dd>';
+      $output .= '<dd>' . t('Some search page plugins, such as the core Content search page, index searchable text using the Drupal core search index, and will not work unless content is indexed. Indexing is done during <em>cron</em> runs, so it requires a <a href=":cron">cron maintenance task</a> to be set up. There are also several settings affecting indexing that can be configured on the <a href=":search-settings">Search pages page</a>: the number of items to index per cron run, the minimum word length to index, and how to handle Chinese, Japanese, and Korean characters.', [':cron' => \Drupal::url('system.cron_settings'), ':search-settings' => \Drupal::url('entity.search_page.collection')]) . '</dd>';
+      $output .= '<dd>' . t('Modules providing search page plugins generally ensure that content-related actions on your site (creating, editing, or deleting content and comments) automatically cause affected content items to be marked for indexing or reindexing at the next cron run. When content is marked for reindexing, the previous content remains in the index until cron runs, at which time it is replaced by the new content. However, there are some actions related to the structure of your site that do not cause affected content to be marked for reindexing. Examples of structure-related actions that affect content include deleting or editing taxonomy terms, enabling or disabling modules that add text to content (such as Taxonomy, Comment, and field-providing modules), and modifying the fields or display parameters of your content types. If you take one of these actions and you want to ensure that the search index is updated to reflect your changed site structure, you can mark all content for reindexing by clicking the "Re-index site" button on the <a href=":search-settings">Search pages page</a>. If you have a lot of content on your site, it may take several cron runs for the content to be reindexed.', [':search-settings' => \Drupal::url('entity.search_page.collection')]) . '</dd>';
       $output .= '<dt>' . t('Displaying the Search block') . '</dt>';
-      $output .= '<dd>' . t('The Search module includes a block, which can be enabled and configured on the <a href=":blocks">Block layout page</a>, if you have the Block module enabled; the default block title is Search, and it is the Search form block in the Forms category, if you wish to add another instance. The block is available to users with the <a href=":search_permission">Use search</a> permission, and it performs a search using the configured default search page.', array(':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#', ':search_permission' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-search')))) . '</dd>';
+      $output .= '<dd>' . t('The Search module includes a block, which can be enabled and configured on the <a href=":blocks">Block layout page</a>, if you have the Block module enabled; the default block title is Search, and it is the Search form block in the Forms category, if you wish to add another instance. The block is available to users with the <a href=":search_permission">Use search</a> permission, and it performs a search using the configured default search page.', [':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#', ':search_permission' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-search'])]) . '</dd>';
       $output .= '<dt>' . t('Searching your site') . '</dt>';
-      $output .= '<dd>' . t('Users with <a href=":search_permission">Use search</a> permission can use the Search block and <a href=":search">Search page</a>. Users with the <a href=":node_permission">View published content</a> permission can use configured search pages of type <em>Content</em> to search for content containing exact keywords; in addition, users with <a href=":search_permission">Use advanced search</a> permission can use more complex search filtering. Users with the <a href=":user_permission">View user information</a> permission can use configured search pages of type <em>Users</em> to search for active users containing the keyword anywhere in the username, and users with the <a href=":user_permission">Administer users</a> permission can search for active and blocked users, by email address or username keyword.', array(':search' => \Drupal::url('search.view'), ':search_permission' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-search')), ':node_permission' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-node')), ':user_permission' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-user')))) . '</dd>';
+      $output .= '<dd>' . t('Users with <a href=":search_permission">Use search</a> permission can use the Search block and <a href=":search">Search page</a>. Users with the <a href=":node_permission">View published content</a> permission can use configured search pages of type <em>Content</em> to search for content containing exact keywords; in addition, users with <a href=":search_permission">Use advanced search</a> permission can use more complex search filtering. Users with the <a href=":user_permission">View user information</a> permission can use configured search pages of type <em>Users</em> to search for active users containing the keyword anywhere in the username, and users with the <a href=":user_permission">Administer users</a> permission can search for active and blocked users, by email address or username keyword.', [':search' => \Drupal::url('search.view'), ':search_permission' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-search']), ':node_permission' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-node']), ':user_permission' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-user'])]) . '</dd>';
       $output .= '<dt>' . t('Extending the Search module') . '</dt>';
-      $output .= '<dd>' . t('By default, the Search module only supports exact keyword matching in content searches. You can modify this behavior by installing a language-specific stemming module for your language (such as <a href=":porterstemmer_url">Porter Stemmer</a> for American English), which allows words such as walk, walking, and walked to be matched in the Search module. Another approach is to use a third-party search technology with stemming or partial word matching features built in, such as <a href=":solr_url">Apache Solr</a> or <a href=":sphinx_url">Sphinx</a>. There are also contributed modules that provide additional search pages. These and other <a href=":contrib-search">search-related contributed modules</a> can be downloaded by visiting Drupal.org.', array(':contrib-search' => 'https://www.drupal.org/project/project_module?f[2]=im_vid_3%3A105', ':porterstemmer_url' => 'https://www.drupal.org/project/porterstemmer', ':solr_url' => 'https://www.drupal.org/project/apachesolr', ':sphinx_url' => 'https://www.drupal.org/project/sphinx')) . '</dd>';
+      $output .= '<dd>' . t('By default, the Search module only supports exact keyword matching in content searches. You can modify this behavior by installing a language-specific stemming module for your language (such as <a href=":porterstemmer_url">Porter Stemmer</a> for American English), which allows words such as walk, walking, and walked to be matched in the Search module. Another approach is to use a third-party search technology with stemming or partial word matching features built in, such as <a href=":solr_url">Apache Solr</a> or <a href=":sphinx_url">Sphinx</a>. There are also contributed modules that provide additional search pages. These and other <a href=":contrib-search">search-related contributed modules</a> can be downloaded by visiting Drupal.org.', [':contrib-search' => 'https://www.drupal.org/project/project_module?f[2]=im_vid_3%3A105', ':porterstemmer_url' => 'https://www.drupal.org/project/porterstemmer', ':solr_url' => 'https://www.drupal.org/project/apachesolr', ':sphinx_url' => 'https://www.drupal.org/project/sphinx']) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
@@ -98,12 +98,12 @@ function search_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function search_theme() {
-  return array(
-    'search_result' => array(
-      'variables' => array('result' => NULL, 'plugin_id' => NULL),
+  return [
+    'search_result' => [
+      'variables' => ['result' => NULL, 'plugin_id' => NULL],
       'file' => 'search.pages.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -168,7 +168,7 @@ function search_index_clear($type = NULL, $sid = NULL, $langcode = NULL) {
  * total counts in the search_total table, and need to be recounted.
  */
 function search_dirty($word = NULL) {
-  $dirty = &drupal_static(__FUNCTION__, array());
+  $dirty = &drupal_static(__FUNCTION__, []);
   if ($word !== NULL) {
     $dirty[$word] = TRUE;
   }
@@ -207,18 +207,18 @@ function search_update_totals() {
   // Update word IDF (Inverse Document Frequency) counts for new/changed words.
   foreach (search_dirty() as $word => $dummy) {
     // Get total count
-    $total = db_query("SELECT SUM(score) FROM {search_index} WHERE word = :word", array(':word' => $word), array('target' => 'replica'))->fetchField();
+    $total = db_query("SELECT SUM(score) FROM {search_index} WHERE word = :word", [':word' => $word], ['target' => 'replica'])->fetchField();
     // Apply Zipf's law to equalize the probability distribution.
     $total = log10(1 + 1 / (max(1, $total)));
     db_merge('search_total')
       ->key('word', $word)
-      ->fields(array('count' => $total))
+      ->fields(['count' => $total])
       ->execute();
   }
   // Find words that were deleted from search_index, but are still in
   // search_total. We use a LEFT JOIN between the two tables and keep only the
   // rows which fail to join.
-  $result = db_query("SELECT t.word AS realword, i.word FROM {search_total} t LEFT JOIN {search_index} i ON t.word = i.word WHERE i.word IS NULL", array(), array('target' => 'replica'));
+  $result = db_query("SELECT t.word AS realword, i.word FROM {search_total} t LEFT JOIN {search_index} i ON t.word = i.word WHERE i.word IS NULL", [], ['target' => 'replica']);
   $or = new Condition('OR');
   foreach ($result as $word) {
     $or->condition('word', $word->realword);
@@ -330,7 +330,7 @@ function search_expand_cjk($matches) {
   }
   $tokens = ' ';
   // Build a FIFO queue of characters.
-  $chars = array();
+  $chars = [];
   for ($i = 0; $i < $length; $i++) {
     // Add the next character off the beginning of the string to the queue.
     $current = Unicode::substr($str, 0, 1);
@@ -383,7 +383,7 @@ function search_index_split($text, $langcode = NULL) {
 function _search_index_truncate(&$text) {
   // Use a static array to avoid re-truncating text we've done before.
   // The same words may often be passed in during excerpt generation.
-  static $truncated = array();
+  static $truncated = [];
   if (isset($truncated[$text])) {
     $text = $truncated[$text];
     return;
@@ -409,7 +409,7 @@ function _search_index_truncate(&$text) {
  */
 function search_invoke_preprocess(&$text, $langcode = NULL) {
   foreach (\Drupal::moduleHandler()->getImplementations('search_preprocess') as $module) {
-    $text = \Drupal::moduleHandler()->invoke($module, 'search_preprocess', array($text, $langcode));
+    $text = \Drupal::moduleHandler()->invoke($module, 'search_preprocess', [$text, $langcode]);
   }
 }
 
@@ -438,7 +438,7 @@ function search_index($type, $sid, $langcode, $text) {
 
   // Strip off all ignored tags to speed up processing, but insert space before
   // and after them to keep word boundaries.
-  $text = str_replace(array('<', '>'), array(' <', '> '), $text);
+  $text = str_replace(['<', '>'], [' <', '> '], $text);
   $text = strip_tags($text, '<' . implode('><', array_keys($tags)) . '>');
 
   // Split HTML tags from plain text.
@@ -449,11 +449,11 @@ function search_index($type, $sid, $langcode, $text) {
   $tag = FALSE; // Odd/even counter. Tag or no tag.
   $score = 1; // Starting score per word
   $accum = ' '; // Accumulator for cleaned up data
-  $tagstack = array(); // Stack with open tags
+  $tagstack = []; // Stack with open tags
   $tagwords = 0; // Counter for consecutive words
   $focus = 1; // Focus state
 
-  $scored_words = array(); // Accumulator for words for index
+  $scored_words = []; // Accumulator for words for index
 
   foreach ($split as $value) {
     if ($tag) {
@@ -465,7 +465,7 @@ function search_index($type, $sid, $langcode, $text) {
         $tagname = substr($tagname, 1);
         // If we encounter unexpected tags, reset score to avoid incorrect boosting.
         if (!count($tagstack) || $tagstack[0] != $tagname) {
-          $tagstack = array();
+          $tagstack = [];
           $score = 1;
         }
         else {
@@ -477,7 +477,7 @@ function search_index($type, $sid, $langcode, $text) {
         if (isset($tagstack[0]) && $tagstack[0] == $tagname) {
           // None of the tags we look for make sense when nested identically.
           // If they are, it's probably broken HTML.
-          $tagstack = array();
+          $tagstack = [];
           $score = 1;
         }
         else {
@@ -509,7 +509,7 @@ function search_index($type, $sid, $langcode, $text) {
           $tagwords++;
           // Too many words inside a single tag probably mean a tag was accidentally left open.
           if (count($tagstack) && $tagwords >= 15) {
-            $tagstack = array();
+            $tagstack = [];
             $score = 1;
           }
         }
@@ -524,13 +524,13 @@ function search_index($type, $sid, $langcode, $text) {
 
   // Insert cleaned up data into dataset
   db_insert('search_dataset')
-    ->fields(array(
+    ->fields([
       'sid' => $sid,
       'langcode' => $langcode,
       'type' => $type,
       'data' => $accum,
       'reindex' => 0,
-    ))
+    ])
     ->execute();
 
   // Insert results into search index
@@ -539,14 +539,14 @@ function search_index($type, $sid, $langcode, $text) {
     // appropriately. If not, we create a new record with the appropriate
     // starting score.
     db_merge('search_index')
-      ->keys(array(
+      ->keys([
         'word' => $word,
         'sid' => $sid,
         'langcode' => $langcode,
         'type' => $type,
-      ))
-      ->fields(array('score' => $score))
-      ->expression('score', 'score + :score', array(':score' => $score))
+      ])
+      ->fields(['score' => $score])
+      ->expression('score', 'score + :score', [':score' => $score])
       ->execute();
     search_dirty($word);
   }
@@ -572,7 +572,7 @@ function search_index($type, $sid, $langcode, $text) {
  */
 function search_mark_for_reindex($type = NULL, $sid = NULL, $langcode = NULL) {
   $query = db_update('search_dataset')
-    ->fields(array('reindex' => REQUEST_TIME))
+    ->fields(['reindex' => REQUEST_TIME])
     // Only mark items that were not previously marked for reindex, so that
     // marked items maintain their priority by request time.
     ->condition('reindex', 0);
@@ -651,14 +651,14 @@ function search_excerpt($keys, $text, $langcode = NULL) {
   $keys = array_merge($matches[2], $matches[3]);
 
   // Prepare text by stripping HTML tags and decoding HTML entities.
-  $text = strip_tags(str_replace(array('<', '>'), array(' <', '> '), $text));
+  $text = strip_tags(str_replace(['<', '>'], [' <', '> '], $text));
   $text = Html::decodeEntities($text);
   $text_length = strlen($text);
 
   // Make a list of unique keywords that are actually found in the text,
   // which could be items in $keys or replacements that are equivalent through
   // search_simplify().
-  $temp_keys = array();
+  $temp_keys = [];
   foreach ($keys as $key) {
     $key = _search_find_match_with_simplify($key, $text, $boundary_character, $langcode);
     if (isset($key)) {
@@ -673,13 +673,13 @@ function search_excerpt($keys, $text, $langcode = NULL) {
   // Extract fragments of about 60 characters around keywords, bounded by word
   // boundary characters. Try to reach 256 characters, using second occurrences
   // if necessary.
-  $ranges = array();
+  $ranges = [];
   $length = 0;
-  $look_start = array();
+  $look_start = [];
   $remaining_keys = $keys;
 
   while ($length < 256 && !empty($remaining_keys)) {
-    $found_keys = array();
+    $found_keys = [];
     foreach ($remaining_keys as $key) {
       if ($length >= 256) {
         break;
@@ -694,7 +694,7 @@ function search_excerpt($keys, $text, $langcode = NULL) {
       // See if we can find $key after where we found it the last time. Since
       // we are requiring a match on a word boundary, make sure $text starts
       // and ends with a space.
-      $matches = array();
+      $matches = [];
       if (preg_match('/' . $preceded_by_boundary . $key . $followed_by_boundary . '/iu', ' ' . $text . ' ', $matches, PREG_OFFSET_CAPTURE, $look_start[$key])) {
         $found_position = $matches[0][1];
         $look_start[$key] = $found_position + 1;
@@ -742,7 +742,7 @@ function search_excerpt($keys, $text, $langcode = NULL) {
   ksort($ranges);
 
   // Collapse overlapping text ranges into one. The sorting makes it O(n).
-  $new_ranges = array();
+  $new_ranges = [];
   $max_end = 0;
   foreach ($ranges as $this_from => $this_to) {
     $max_end = max($max_end, $this_to);
@@ -767,7 +767,7 @@ function search_excerpt($keys, $text, $langcode = NULL) {
   $new_ranges[$working_from] = $working_to;
 
   // Fetch text within the combined ranges we found.
-  $out = array();
+  $out = [];
   foreach ($new_ranges as $from => $to) {
     $out[] = substr($text, $from, $to - $from);
   }
@@ -847,7 +847,7 @@ function _search_find_match_with_simplify($key, $text, $boundary, $langcode = NU
   // Split $text into words, keeping track of where the word boundaries are.
   $words = preg_split('/' . $boundary . '+/u', $text, NULL, PREG_SPLIT_OFFSET_CAPTURE);
   // Add an entry pointing to the end of the string, for the loop below.
-  $words[] = array('', strlen($text));
+  $words[] = ['', strlen($text)];
 
   // Using a binary search, find the earliest possible ending position in
   // $text where it will still match the keyword after applying
diff --git a/core/modules/search/search.pages.inc b/core/modules/search/search.pages.inc
index a161a9bfae2664085c25d8c20005a479c823e150..9467dd82501b39180894e1c590894197b5bce0cf 100644
--- a/core/modules/search/search.pages.inc
+++ b/core/modules/search/search.pages.inc
@@ -12,7 +12,7 @@
  * Implements hook_theme_suggestions_HOOK().
  */
 function search_theme_suggestions_search_result(array $variables) {
-  return array('search_result__' . $variables['plugin_id']);
+  return ['search_result__' . $variables['plugin_id']];
 }
 
 /**
@@ -42,7 +42,7 @@ function template_preprocess_search_result(&$variables) {
     $variables['content_attributes']['lang'] = $result['language'];
   }
 
-  $info = array();
+  $info = [];
   if (!empty($result['plugin_id'])) {
     $info['plugin_id'] = $result['plugin_id'];
   }
@@ -59,9 +59,9 @@ function template_preprocess_search_result(&$variables) {
   $variables['snippet'] = isset($result['snippet']) ? $result['snippet'] : '';
   // Provide separated and grouped meta information..
   $variables['info_split'] = $info;
-  $variables['info'] = array(
+  $variables['info'] = [
     '#type' => 'inline_template',
     '#template' => '{{ info|safe_join(" - ") }}',
-    '#context' => array('info' => $info),
-  );
+    '#context' => ['info' => $info],
+  ];
 }
diff --git a/core/modules/search/src/Controller/SearchController.php b/core/modules/search/src/Controller/SearchController.php
index 3460c32068c1f25bd4084aeb3df544d189cac276..ac078e18eb5393ffa78c0b46cb798fc40343e879 100644
--- a/core/modules/search/src/Controller/SearchController.php
+++ b/core/modules/search/src/Controller/SearchController.php
@@ -72,7 +72,7 @@ public static function create(ContainerInterface $container) {
    *   The search form and search results build array.
    */
   public function view(Request $request, SearchPageInterface $entity) {
-    $build = array();
+    $build = [];
     $plugin = $entity->getPlugin();
 
     // Build the form first, because it may redirect during the submit,
@@ -89,12 +89,12 @@ public function view(Request $request, SearchPageInterface $entity) {
     // Build search results, if keywords or other search parameters are in the
     // GET parameters. Note that we need to try the search if 'keys' is in
     // there at all, vs. being empty, due to advanced search.
-    $results = array();
+    $results = [];
     if ($request->query->has('keys')) {
       if ($plugin->isSearchExecutable()) {
         // Log the search.
         if ($this->config('search.settings')->get('logging')) {
-          $this->logger->notice('Searched %type for %keys.', array('%keys' => $keys, '%type' => $entity->label()));
+          $this->logger->notice('Searched %type for %keys.', ['%keys' => $keys, '%type' => $entity->label()]);
         }
 
         // Collect the search results.
@@ -108,22 +108,22 @@ public function view(Request $request, SearchPageInterface $entity) {
     }
 
     if (count($results)) {
-      $build['search_results_title'] = array(
+      $build['search_results_title'] = [
         '#markup' => '<h2>' . $this->t('Search results') . '</h2>',
-      );
+      ];
     }
 
-    $build['search_results'] = array(
-      '#theme' => array('item_list__search_results__' . $plugin->getPluginId(), 'item_list__search_results'),
+    $build['search_results'] = [
+      '#theme' => ['item_list__search_results__' . $plugin->getPluginId(), 'item_list__search_results'],
       '#items' => $results,
-      '#empty' => array(
+      '#empty' => [
         '#markup' => '<h3>' . $this->t('Your search yielded no results.') . '</h3>',
-      ),
+      ],
       '#list_type' => 'ol',
-      '#context' => array(
+      '#context' => [
         'plugin' => $plugin->getPluginId(),
-      ),
-    );
+      ],
+    ];
 
     $this->renderer->addCacheableDependency($build, $entity);
     if ($plugin instanceof CacheableDependencyInterface) {
@@ -138,9 +138,9 @@ public function view(Request $request, SearchPageInterface $entity) {
       $build['search_results']['#cache']['tags'][] = 'search_index:' . $plugin->getType();
     }
 
-    $build['pager'] = array(
+    $build['pager'] = [
       '#type' => 'pager',
-    );
+    ];
 
     return $build;
   }
@@ -157,7 +157,7 @@ public function view(Request $request, SearchPageInterface $entity) {
    *   The search help page.
    */
   public function searchHelp(SearchPageInterface $entity) {
-    $build = array();
+    $build = [];
 
     $build['search_help'] = $entity->getPlugin()->getHelp();
 
@@ -189,7 +189,7 @@ public function redirectSearchPage(SearchPageInterface $entity) {
    *   The title for the search page edit form.
    */
   public function editTitle(SearchPageInterface $search_page) {
-    return $this->t('Edit %label search page', array('%label' => $search_page->label()));
+    return $this->t('Edit %label search page', ['%label' => $search_page->label()]);
   }
 
   /**
@@ -207,10 +207,10 @@ public function performOperation(SearchPageInterface $search_page, $op) {
     $search_page->$op()->save();
 
     if ($op == 'enable') {
-      drupal_set_message($this->t('The %label search page has been enabled.', array('%label' => $search_page->label())));
+      drupal_set_message($this->t('The %label search page has been enabled.', ['%label' => $search_page->label()]));
     }
     elseif ($op == 'disable') {
-      drupal_set_message($this->t('The %label search page has been disabled.', array('%label' => $search_page->label())));
+      drupal_set_message($this->t('The %label search page has been disabled.', ['%label' => $search_page->label()]));
     }
 
     $url = $search_page->urlInfo('collection');
@@ -230,7 +230,7 @@ public function setAsDefault(SearchPageInterface $search_page) {
     // Set the default page to this search page.
     $this->searchPageRepository->setDefaultSearchPage($search_page);
 
-    drupal_set_message($this->t('The default search page is now %label. Be sure to check the ordering of your search pages.', array('%label' => $search_page->label())));
+    drupal_set_message($this->t('The default search page is now %label. Be sure to check the ordering of your search pages.', ['%label' => $search_page->label()]));
     return $this->redirect('entity.search_page.collection');
   }
 
diff --git a/core/modules/search/src/Entity/SearchPage.php b/core/modules/search/src/Entity/SearchPage.php
index 1cb2f892fbd7b7a62b1ba313a99c6e6e086cb9d8..298331fdf0c24a9b46c31bb937f4a4e4905568d9 100644
--- a/core/modules/search/src/Entity/SearchPage.php
+++ b/core/modules/search/src/Entity/SearchPage.php
@@ -73,7 +73,7 @@ class SearchPage extends ConfigEntityBase implements SearchPageInterface, Entity
    *
    * @var array
    */
-  protected $configuration = array();
+  protected $configuration = [];
 
   /**
    * The search plugin ID.
@@ -129,7 +129,7 @@ protected function getPluginCollection() {
    * {@inheritdoc}
    */
   public function getPluginCollections() {
-    return array('configuration' => $this->getPluginCollection());
+    return ['configuration' => $this->getPluginCollection()];
   }
 
   /**
diff --git a/core/modules/search/src/Form/SearchBlockForm.php b/core/modules/search/src/Form/SearchBlockForm.php
index cd198fd7944df4e5c2396695c620f1ca6b792030..5d77b7c3bfb281ad3c59d8840dfb8d13ec07b60f 100644
--- a/core/modules/search/src/Form/SearchBlockForm.php
+++ b/core/modules/search/src/Form/SearchBlockForm.php
@@ -76,9 +76,9 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Set up the form to submit using GET to the correct search page.
     $entity_id = $this->searchPageRepository->getDefaultSearchPage();
     if (!$entity_id) {
-      $form['message'] = array(
+      $form['message'] = [
         '#markup' => $this->t('Search is currently disabled'),
-      );
+      ];
       return $form;
     }
 
@@ -86,22 +86,22 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['#action'] = $this->url($route);
     $form['#method'] = 'get';
 
-    $form['keys'] = array(
+    $form['keys'] = [
       '#type' => 'search',
       '#title' => $this->t('Search'),
       '#title_display' => 'invisible',
       '#size' => 15,
       '#default_value' => '',
-      '#attributes' => array('title' => $this->t('Enter the terms you wish to search for.')),
-    );
+      '#attributes' => ['title' => $this->t('Enter the terms you wish to search for.')],
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Search'),
       // Prevent op from showing up in the query string.
       '#name' => '',
-    );
+    ];
 
     // SearchPageRepository::getDefaultSearchPage() depends on search.settings.
     $this->renderer->addCacheableDependency($form, $this->configFactory->get('search.settings'));
diff --git a/core/modules/search/src/Form/SearchPageAddForm.php b/core/modules/search/src/Form/SearchPageAddForm.php
index a97f1fa5eff9b70dfa8b8f38f3e69cb90c364cbb..d5bc7850ec76d4e8895fc033607665417ff29571 100644
--- a/core/modules/search/src/Form/SearchPageAddForm.php
+++ b/core/modules/search/src/Form/SearchPageAddForm.php
@@ -39,7 +39,7 @@ public function save(array $form, FormStateInterface $form_state) {
 
     parent::save($form, $form_state);
 
-    drupal_set_message($this->t('The %label search page has been added.', array('%label' => $this->entity->label())));
+    drupal_set_message($this->t('The %label search page has been added.', ['%label' => $this->entity->label()]));
   }
 
 }
diff --git a/core/modules/search/src/Form/SearchPageEditForm.php b/core/modules/search/src/Form/SearchPageEditForm.php
index 694b8567b08ad944bfc3bb1fd9b5d19fe082d806..9d082eb5520a1b035ae509aa8e198861d21d304d 100644
--- a/core/modules/search/src/Form/SearchPageEditForm.php
+++ b/core/modules/search/src/Form/SearchPageEditForm.php
@@ -24,7 +24,7 @@ protected function actions(array $form, FormStateInterface $form_state) {
   public function save(array $form, FormStateInterface $form_state) {
     parent::save($form, $form_state);
 
-    drupal_set_message($this->t('The %label search page has been updated.', array('%label' => $this->entity->label())));
+    drupal_set_message($this->t('The %label search page has been updated.', ['%label' => $this->entity->label()]));
   }
 
 }
diff --git a/core/modules/search/src/Form/SearchPageForm.php b/core/modules/search/src/Form/SearchPageForm.php
index 1521beb6da7201f0ce01bd74583c4f9a8c8d4743..88b99e55eba3be8bdae6e136fdaac0b12fec2613 100644
--- a/core/modules/search/src/Form/SearchPageForm.php
+++ b/core/modules/search/src/Form/SearchPageForm.php
@@ -38,37 +38,37 @@ public function form(array $form, FormStateInterface $form_state) {
     $plugin = $this->entity->getPlugin();
     $form_state->set('search_page_id', $this->entity->id());
 
-    $form['basic'] = array(
+    $form['basic'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('container-inline'),
-      ),
-    );
-    $form['basic']['keys'] = array(
+      '#attributes' => [
+        'class' => ['container-inline'],
+      ],
+    ];
+    $form['basic']['keys'] = [
       '#type' => 'search',
       '#title' => $this->t('Enter your keywords'),
       '#default_value' => $plugin->getKeywords(),
       '#size' => 30,
       '#maxlength' => 255,
-    );
+    ];
 
     // processed_keys is used to coordinate keyword passing between other forms
     // that hook into the basic search form.
-    $form['basic']['processed_keys'] = array(
+    $form['basic']['processed_keys'] = [
       '#type' => 'value',
       '#value' => '',
-    );
-    $form['basic']['submit'] = array(
+    ];
+    $form['basic']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Search'),
-    );
+    ];
 
-    $form['help_link'] = array(
+    $form['help_link'] = [
       '#type' => 'link',
       '#url' => new Url('search.help_' . $this->entity->id()),
       '#title' => $this->t('Search help'),
-      '#options' => array('attributes' => array('class' => 'search-help-link')),
-    );
+      '#options' => ['attributes' => ['class' => 'search-help-link']],
+    ];
 
     // Allow the plugin to add to or alter the search form.
     $plugin->searchFormAlter($form, $form_state);
@@ -81,7 +81,7 @@ public function form(array $form, FormStateInterface $form_state) {
    */
   protected function actions(array $form, FormStateInterface $form_state) {
     // The submit button is added in the form directly.
-    return array();
+    return [];
   }
 
   /**
@@ -97,8 +97,8 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $route = 'search.view_' . $form_state->get('search_page_id');
     $form_state->setRedirect(
       $route,
-      array(),
-      array('query' => $query)
+      [],
+      ['query' => $query]
     );
   }
 
diff --git a/core/modules/search/src/Form/SearchPageFormBase.php b/core/modules/search/src/Form/SearchPageFormBase.php
index bc7032f428a14ae01b8bf91c916d107384a1c29e..1638f90a86b079fb90631ad952f3823a309b8932 100644
--- a/core/modules/search/src/Form/SearchPageFormBase.php
+++ b/core/modules/search/src/Form/SearchPageFormBase.php
@@ -72,35 +72,35 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function form(array $form, FormStateInterface $form_state) {
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label'),
       '#description' => $this->t('The label for this search page.'),
       '#default_value' => $this->entity->label(),
       '#maxlength' => '255',
-    );
+    ];
 
-    $form['id'] = array(
+    $form['id'] = [
       '#type' => 'machine_name',
       '#default_value' => $this->entity->id(),
       '#disabled' => !$this->entity->isNew(),
       '#maxlength' => 64,
-      '#machine_name' => array(
-        'exists' => array($this, 'exists'),
-      ),
-    );
-    $form['path'] = array(
+      '#machine_name' => [
+        'exists' => [$this, 'exists'],
+      ],
+    ];
+    $form['path'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Path'),
       '#field_prefix' => 'search/',
       '#default_value' => $this->entity->getPath(),
       '#maxlength' => '255',
       '#required' => TRUE,
-    );
-    $form['plugin'] = array(
+    ];
+    $form['plugin'] = [
       '#type' => 'value',
       '#value' => $this->entity->get('plugin'),
-    );
+    ];
 
     if ($this->plugin instanceof PluginFormInterface) {
       $form += $this->plugin->buildConfigurationForm($form, $form_state);
diff --git a/core/modules/search/src/Plugin/ConfigurableSearchPluginBase.php b/core/modules/search/src/Plugin/ConfigurableSearchPluginBase.php
index 4f259831d0ce91a84cd1fa69c7447bab8d748f78..7ad95f16823b27b99dd1a8bcc16c3918c3cffd62 100644
--- a/core/modules/search/src/Plugin/ConfigurableSearchPluginBase.php
+++ b/core/modules/search/src/Plugin/ConfigurableSearchPluginBase.php
@@ -30,7 +30,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array();
+    return [];
   }
 
   /**
@@ -57,7 +57,7 @@ public function validateConfigurationForm(array &$form, FormStateInterface $form
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/search/src/Plugin/Derivative/SearchLocalTask.php b/core/modules/search/src/Plugin/Derivative/SearchLocalTask.php
index adc356e954aa48239e174d0045dec1347730a2ef..9f62a375ea746a7627a6319901e319ec8d7719a9 100644
--- a/core/modules/search/src/Plugin/Derivative/SearchLocalTask.php
+++ b/core/modules/search/src/Plugin/Derivative/SearchLocalTask.php
@@ -42,17 +42,17 @@ public static function create(ContainerInterface $container, $base_plugin_id) {
    * {@inheritdoc}
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    $this->derivatives = array();
+    $this->derivatives = [];
 
     if ($default = $this->searchPageRepository->getDefaultSearchPage()) {
       $active_search_pages = $this->searchPageRepository->getActiveSearchPages();
       foreach ($this->searchPageRepository->sortSearchPages($active_search_pages) as $entity_id => $entity) {
-        $this->derivatives[$entity_id] = array(
+        $this->derivatives[$entity_id] = [
           'title' => $entity->label(),
           'route_name' => 'search.view_' . $entity_id,
           'base_route' => 'search.plugins:' . $default,
           'weight' => $entity->getWeight(),
-        );
+        ];
       }
     }
     return $this->derivatives;
diff --git a/core/modules/search/src/Plugin/SearchPluginBase.php b/core/modules/search/src/Plugin/SearchPluginBase.php
index d253972ce16d16c045cacfea592982d77de296bf..7bf4f0f4e35bd61e89f9e83ecf2abd5174fa7c4a 100644
--- a/core/modules/search/src/Plugin/SearchPluginBase.php
+++ b/core/modules/search/src/Plugin/SearchPluginBase.php
@@ -97,13 +97,13 @@ public function getType() {
   public function buildResults() {
     $results = $this->execute();
 
-    $built = array();
+    $built = [];
     foreach ($results as $result) {
-      $built[] = array(
+      $built[] = [
         '#theme' => 'search_result',
         '#result' => $result,
         '#plugin_id' => $this->getPluginId(),
-      );
+      ];
     }
 
     return $built;
@@ -123,7 +123,7 @@ public function suggestedTitle() {
     // If the user entered a search string, truncate it and append it to the
     // title.
     if (!empty($this->keywords)) {
-      return $this->t('Search for @keywords', array('@keywords' => Unicode::truncate($this->keywords, 60, TRUE, TRUE)));
+      return $this->t('Search for @keywords', ['@keywords' => Unicode::truncate($this->keywords, 60, TRUE, TRUE)]);
     }
     // Use the default 'Search' title.
     return $this->t('Search');
@@ -135,7 +135,7 @@ public function suggestedTitle() {
   public function buildSearchUrlQuery(FormStateInterface $form_state) {
     // Grab the keywords entered in the form and put them as 'keys' in the GET.
     $keys = trim($form_state->getValue('keys'));
-    $query = array('keys' => $keys);
+    $query = ['keys' => $keys];
 
     return $query;
   }
@@ -146,16 +146,16 @@ public function buildSearchUrlQuery(FormStateInterface $form_state) {
   public function getHelp() {
     // This default search help is appropriate for plugins like NodeSearch
     // that use the SearchQuery class.
-    $help = array('list' => array(
+    $help = ['list' => [
       '#theme' => 'item_list',
-      '#items' => array(
+      '#items' => [
         $this->t('Search looks for exact, case-insensitive keywords; keywords shorter than a minimum length are ignored.'),
         $this->t('Use upper-case OR to get more results. Example: cat OR dog (content contains either "cat" or "dog").'),
         $this->t('You can use upper-case AND to require all words, but this is the same as the default behavior. Example: cat AND dog (same as cat dog, content must contain both "cat" and "dog").'),
         $this->t('Use quotes to search for a phrase. Example: "the cat eats mice".'),
         $this->t('You can precede keywords by - to exclude them; you must still have at least one "positive" keyword. Example: cat -dog (content must contain cat and cannot contain dog).'),
-      ),
-    ));
+      ],
+    ]];
 
     return $help;
   }
diff --git a/core/modules/search/src/Plugin/migrate/process/SearchConfigurationRankings.php b/core/modules/search/src/Plugin/migrate/process/SearchConfigurationRankings.php
index f021df68be1266c870af32920f35e11e0f370008..8199215c327c9e6b0e0189b4dcc8dd9281c1b85c 100644
--- a/core/modules/search/src/Plugin/migrate/process/SearchConfigurationRankings.php
+++ b/core/modules/search/src/Plugin/migrate/process/SearchConfigurationRankings.php
@@ -21,7 +21,7 @@ class SearchConfigurationRankings extends ProcessPluginBase {
    * Generate the configuration rankings.
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
-    $return = array();
+    $return = [];
     foreach ($row->getSource() as $name => $rank) {
       if (substr($name, 0, 10) == 'node_rank_' && is_numeric($rank)) {
         $return[substr($name, 10)] = $rank;
diff --git a/core/modules/search/src/Plugin/migrate/process/d6/SearchConfigurationRankings.php b/core/modules/search/src/Plugin/migrate/process/d6/SearchConfigurationRankings.php
index 6c1d16b0409cc3adaf61497e91a5e810304fc2aa..206f1f8060b1672564860c33dfea4f2dace18b85 100644
--- a/core/modules/search/src/Plugin/migrate/process/d6/SearchConfigurationRankings.php
+++ b/core/modules/search/src/Plugin/migrate/process/d6/SearchConfigurationRankings.php
@@ -21,7 +21,7 @@ class SearchConfigurationRankings extends ProcessPluginBase {
    * Generate the configuration rankings.
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
-    $return = array();
+    $return = [];
     foreach ($row->getSource() as $name => $rank) {
       if (substr($name, 0, 10) == 'node_rank_' && $rank) {
         $return[substr($name, 10)] = $rank;
diff --git a/core/modules/search/src/Plugin/views/argument/Search.php b/core/modules/search/src/Plugin/views/argument/Search.php
index c56cd09982a2e65c376c41e740694a8dd7a26180..7e9f00d4bd8225ebbc10c1a241e6082c352da80e 100644
--- a/core/modules/search/src/Plugin/views/argument/Search.php
+++ b/core/modules/search/src/Plugin/views/argument/Search.php
@@ -48,7 +48,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    */
   protected function queryParseSearchExpression($input) {
     if (!isset($this->searchQuery)) {
-      $this->searchQuery = db_select('search_index', 'i', array('target' => 'replica'))->extend('Drupal\search\ViewsSearchQuery');
+      $this->searchQuery = db_select('search_index', 'i', ['target' => 'replica'])->extend('Drupal\search\ViewsSearchQuery');
       $this->searchQuery->searchExpression($input, $this->searchType);
       $this->searchQuery->publicParseSearchExpression();
     }
@@ -80,17 +80,17 @@ public function query($group_by = FALSE) {
       $search_condition = new Condition('AND');
 
       // Create a new join to relate the 'search_total' table to our current 'search_index' table.
-      $definition = array(
+      $definition = [
         'table' => 'search_total',
         'field' => 'word',
         'left_table' => $search_index,
         'left_field' => 'word',
-      );
+      ];
       $join = Views::pluginManager('join')->createInstance('standard', $definition);
       $search_total = $this->query->addRelationship('search_total', $join, $search_index);
 
       // Add the search score field to the query.
-      $this->search_score = $this->query->addField('', "$search_index.score * $search_total.count", 'score', array('function' => 'sum'));
+      $this->search_score = $this->query->addField('', "$search_index.score * $search_total.count", 'score', ['function' => 'sum']);
 
       // Add the conditions set up by the search query to the views query.
       $search_condition->condition("$search_index.type", $this->searchType);
@@ -121,7 +121,7 @@ public function query($group_by = FALSE) {
       $this->query->addGroupBy("$search_index.sid");
       $matches = $this->searchQuery->matches();
       $placeholder = $this->placeholder();
-      $this->query->addHavingExpression(0, "COUNT(*) >= $placeholder", array($placeholder => $matches));
+      $this->query->addHavingExpression(0, "COUNT(*) >= $placeholder", [$placeholder => $matches]);
     }
 
     // Set to NULL to prevent PDO exception when views object is cached
diff --git a/core/modules/search/src/Plugin/views/filter/Search.php b/core/modules/search/src/Plugin/views/filter/Search.php
index 14b14da5accc315bb43ce2970aa605c3f963607b..ac0f671ae21cbb9c30056ba14775fe752340b09a 100644
--- a/core/modules/search/src/Plugin/views/filter/Search.php
+++ b/core/modules/search/src/Plugin/views/filter/Search.php
@@ -68,28 +68,28 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   protected function operatorForm(&$form, FormStateInterface $form_state) {
-    $form['operator'] = array(
+    $form['operator'] = [
       '#type' => 'radios',
       '#title' => $this->t('On empty input'),
       '#default_value' => $this->operator,
-      '#options' => array(
+      '#options' => [
         'optional' => $this->t('Show All'),
         'required' => $this->t('Show None'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   protected function valueForm(&$form, FormStateInterface $form_state) {
-    $form['value'] = array(
+    $form['value'] = [
       '#type' => 'textfield',
       '#size' => 15,
       '#default_value' => $this->value,
-      '#attributes' => array('title' => $this->t('Search keywords')),
+      '#attributes' => ['title' => $this->t('Search keywords')],
       '#title' => !$form_state->get('exposed') ? $this->t('Keywords') : '',
-    );
+    ];
   }
 
   /**
@@ -118,7 +118,7 @@ public function validateExposed(&$form, FormStateInterface $form_state) {
   protected function queryParseSearchExpression($input) {
     if (!isset($this->searchQuery)) {
       $this->parsed = TRUE;
-      $this->searchQuery = db_select('search_index', 'i', array('target' => 'replica'))->extend('Drupal\search\ViewsSearchQuery');
+      $this->searchQuery = db_select('search_index', 'i', ['target' => 'replica'])->extend('Drupal\search\ViewsSearchQuery');
       $this->searchQuery->searchExpression($input, $this->searchType);
       $this->searchQuery->publicParseSearchExpression();
     }
@@ -155,17 +155,17 @@ public function query() {
 
       // Create a new join to relate the 'search_total' table to our current
       // 'search_index' table.
-      $definition = array(
+      $definition = [
         'table' => 'search_total',
         'field' => 'word',
         'left_table' => $search_index,
         'left_field' => 'word',
-      );
+      ];
       $join = Views::pluginManager('join')->createInstance('standard', $definition);
       $search_total = $this->query->addRelationship('search_total', $join, $search_index);
 
       // Add the search score field to the query.
-      $this->search_score = $this->query->addField('', "$search_index.score * $search_total.count", 'score', array('function' => 'sum'));
+      $this->search_score = $this->query->addField('', "$search_index.score * $search_total.count", 'score', ['function' => 'sum']);
 
       // Add the conditions set up by the search query to the views query.
       $search_condition->condition("$search_index.type", $this->searchType);
@@ -197,7 +197,7 @@ public function query() {
       $this->query->addGroupBy("$search_index.sid");
       $matches = $this->searchQuery->matches();
       $placeholder = $this->placeholder();
-      $this->query->addHavingExpression($this->options['group'], "COUNT(*) >= $placeholder", array($placeholder => $matches));
+      $this->query->addHavingExpression($this->options['group'], "COUNT(*) >= $placeholder", [$placeholder => $matches]);
     }
     // Set to NULL to prevent PDO exception when views object is cached.
     $this->searchQuery = NULL;
diff --git a/core/modules/search/src/Plugin/views/row/SearchRow.php b/core/modules/search/src/Plugin/views/row/SearchRow.php
index 51f785368467cb8f7129683e0a58ea2a5ec055ab..29e150d557ba22c97ab2e0b3ec33333efef783f8 100644
--- a/core/modules/search/src/Plugin/views/row/SearchRow.php
+++ b/core/modules/search/src/Plugin/views/row/SearchRow.php
@@ -22,7 +22,7 @@ class SearchRow extends RowPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['score'] = array('default' => TRUE);
+    $options['score'] = ['default' => TRUE];
 
     return $options;
   }
@@ -31,23 +31,23 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['score'] = array(
+    $form['score'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Display score'),
       '#default_value' => $this->options['score'],
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function render($row) {
-    return array(
+    return [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#row' => $row,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/search/src/Plugin/views/sort/Score.php b/core/modules/search/src/Plugin/views/sort/Score.php
index 7a7bbf0f7be027377eb2aad283818debacdb7f7e..f5910f0d56ecc2741feca373d8b963815d21f848 100644
--- a/core/modules/search/src/Plugin/views/sort/Score.php
+++ b/core/modules/search/src/Plugin/views/sort/Score.php
@@ -21,7 +21,7 @@ public function query() {
     // Our filter stores it as $handler->search_score -- and we also
     // need to check its relationship to make sure that we're using the same
     // one or obviously this won't work.
-    foreach (array('filter', 'argument') as $type) {
+    foreach (['filter', 'argument'] as $type) {
       foreach ($this->view->{$type} as $handler) {
         if (isset($handler->search_score) && $handler->relationship == $this->relationship) {
           $this->query->addOrderBy(NULL, NULL, $this->options['order'], $handler->search_score);
diff --git a/core/modules/search/src/Routing/SearchPageRoutes.php b/core/modules/search/src/Routing/SearchPageRoutes.php
index b85cbe8f293d8a27a4204c6244f119554f5d12d9..6e199d3dfc94aeb73cbeff9f1b8cddf913ded904 100644
--- a/core/modules/search/src/Routing/SearchPageRoutes.php
+++ b/core/modules/search/src/Routing/SearchPageRoutes.php
@@ -45,70 +45,70 @@ public static function create(ContainerInterface $container) {
    *   An array of route objects.
    */
   public function routes() {
-    $routes = array();
+    $routes = [];
     // @todo Decide if /search should continue to redirect to /search/$default,
     //   or just perform the appropriate search.
     if ($default_page = $this->searchPageRepository->getDefaultSearchPage()) {
       $routes['search.view'] = new Route(
         '/search',
-        array(
+        [
           '_controller' => 'Drupal\search\Controller\SearchController::redirectSearchPage',
           '_title' => 'Search',
           'entity' => $default_page,
-        ),
-        array(
+        ],
+        [
           '_entity_access' => 'entity.view',
           '_permission' => 'search content',
-        ),
-        array(
-          'parameters' => array(
-            'entity' => array(
+        ],
+        [
+          'parameters' => [
+            'entity' => [
               'type' => 'entity:search_page',
-            ),
-          ),
-        )
+            ],
+          ],
+        ]
       );
     }
     $active_pages = $this->searchPageRepository->getActiveSearchPages();
     foreach ($active_pages as $entity_id => $entity) {
       $routes["search.view_$entity_id"] = new Route(
         '/search/' . $entity->getPath(),
-        array(
+        [
           '_controller' => 'Drupal\search\Controller\SearchController::view',
           '_title' => 'Search',
           'entity' => $entity_id,
-        ),
-        array(
+        ],
+        [
           '_entity_access' => 'entity.view',
           '_permission' => 'search content',
-        ),
-        array(
-          'parameters' => array(
-            'entity' => array(
+        ],
+        [
+          'parameters' => [
+            'entity' => [
               'type' => 'entity:search_page',
-            ),
-          ),
-        )
+            ],
+          ],
+        ]
       );
 
       $routes["search.help_$entity_id"] = new Route(
         '/search/' . $entity->getPath() . '/help',
-        array(
+        [
           '_controller' => 'Drupal\search\Controller\SearchController::searchHelp',
           '_title' => 'Search help',
           'entity' => $entity_id,
-        ),
-        array(
+        ],
+        [
           '_entity_access' => 'entity.view',
           '_permission' => 'search content',
-        ),
-        array(
-          'parameters' => array(
-            'entity' => array(
+        ],
+        [
+          'parameters' => [
+            'entity' => [
               'type' => 'entity:search_page',
-            ),
-          ),
-        )
+            ],
+          ],
+        ]
       );
     }
     return $routes;
diff --git a/core/modules/search/src/SearchPageAccessControlHandler.php b/core/modules/search/src/SearchPageAccessControlHandler.php
index be135bc892a93cb343f833dbca7da2625f49fb2a..2627f51e0e4937b1e690cc359960a574c507624d 100644
--- a/core/modules/search/src/SearchPageAccessControlHandler.php
+++ b/core/modules/search/src/SearchPageAccessControlHandler.php
@@ -20,7 +20,7 @@ class SearchPageAccessControlHandler extends EntityAccessControlHandler {
    */
   protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
     /** @var $entity \Drupal\search\SearchPageInterface */
-    if (in_array($operation, array('delete', 'disable'))) {
+    if (in_array($operation, ['delete', 'disable'])) {
       if ($entity->isDefaultSearch()) {
         return AccessResult::forbidden()->addCacheableDependency($entity);
       }
diff --git a/core/modules/search/src/SearchPageListBuilder.php b/core/modules/search/src/SearchPageListBuilder.php
index c76a999aa91e9e80d63b9f3adec6af9327aa3f54..9a8f6deb302e056bb0c81ba3a1d0a45031ee58a6 100644
--- a/core/modules/search/src/SearchPageListBuilder.php
+++ b/core/modules/search/src/SearchPageListBuilder.php
@@ -26,7 +26,7 @@ class SearchPageListBuilder extends DraggableListBuilder implements FormInterfac
    *
    * @var \Drupal\search\SearchPageInterface[]
    */
-  protected $entities = array();
+  protected $entities = [];
 
   /**
    * Stores the configuration factory.
@@ -90,24 +90,24 @@ protected function getEditableConfigNames() {
    * {@inheritdoc}
    */
   public function buildHeader() {
-    $header['label'] = array(
+    $header['label'] = [
       'data' => $this->t('Label'),
-    );
-    $header['url'] = array(
+    ];
+    $header['url'] = [
       'data' => $this->t('URL'),
-      'class' => array(RESPONSIVE_PRIORITY_LOW),
-    );
-    $header['plugin'] = array(
+      'class' => [RESPONSIVE_PRIORITY_LOW],
+    ];
+    $header['plugin'] = [
       'data' => $this->t('Type'),
-      'class' => array(RESPONSIVE_PRIORITY_LOW),
-    );
-    $header['status'] = array(
+      'class' => [RESPONSIVE_PRIORITY_LOW],
+    ];
+    $header['status'] = [
       'data' => $this->t('Status'),
-    );
-    $header['progress'] = array(
+    ];
+    $header['progress'] = [
       'data' => $this->t('Indexing progress'),
-      'class' => array(RESPONSIVE_PRIORITY_MEDIUM),
-    );
+      'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+    ];
     return $header + parent::buildHeader();
   }
 
@@ -120,11 +120,11 @@ public function buildRow(EntityInterface $entity) {
     $row['url']['#markup'] = 'search/' . $entity->getPath();
     // If the search page is active, link to it.
     if ($entity->status()) {
-      $row['url'] = array(
+      $row['url'] = [
         '#type' => 'link',
         '#title' => $row['url'],
         '#url' => Url::fromRoute('search.view_' . $entity->id()),
-      );
+      ];
     }
 
     $definition = $entity->getPlugin()->getPluginDefinition();
@@ -143,10 +143,10 @@ public function buildRow(EntityInterface $entity) {
 
     if ($entity->isIndexable()) {
       $status = $entity->getPlugin()->indexStatus();
-      $row['progress']['#markup'] = $this->t('%num_indexed of %num_total indexed', array(
+      $row['progress']['#markup'] = $this->t('%num_indexed of %num_total indexed', [
         '%num_indexed' => $status['total'] - $status['remaining'],
         '%num_total' => $status['total']
-      ));
+      ]);
     }
     else {
       $row['progress']['#markup'] = $this->t('Does not use index');
@@ -178,102 +178,102 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // will show as 99%, to indicate "almost done".
     $percentage = $total > 0 ? floor(100 * $done / $total) : 100;
     $percentage .= '%';
-    $status = '<p><strong>' . $this->t('%percentage of the site has been indexed.', array('%percentage' => $percentage)) . ' ' . $count . '</strong></p>';
-    $form['status'] = array(
+    $status = '<p><strong>' . $this->t('%percentage of the site has been indexed.', ['%percentage' => $percentage]) . ' ' . $count . '</strong></p>';
+    $form['status'] = [
       '#type' => 'details',
       '#title' => $this->t('Indexing progress'),
       '#open' => TRUE,
-      '#description' => $this->t('Only items in the index will appear in search results. To build and maintain the index, a correctly configured <a href=":cron">cron maintenance task</a> is required.', array(':cron' => \Drupal::url('system.cron_settings'))),
-    );
-    $form['status']['status'] = array('#markup' => $status);
-    $form['status']['wipe'] = array(
+      '#description' => $this->t('Only items in the index will appear in search results. To build and maintain the index, a correctly configured <a href=":cron">cron maintenance task</a> is required.', [':cron' => \Drupal::url('system.cron_settings')]),
+    ];
+    $form['status']['status'] = ['#markup' => $status];
+    $form['status']['wipe'] = [
       '#type' => 'submit',
       '#value' => $this->t('Re-index site'),
-      '#submit' => array('::searchAdminReindexSubmit'),
-    );
+      '#submit' => ['::searchAdminReindexSubmit'],
+    ];
 
-    $items = array(10, 20, 50, 100, 200, 500);
+    $items = [10, 20, 50, 100, 200, 500];
     $items = array_combine($items, $items);
 
     // Indexing throttle:
-    $form['indexing_throttle'] = array(
+    $form['indexing_throttle'] = [
       '#type' => 'details',
       '#title' => $this->t('Indexing throttle'),
       '#open' => TRUE,
-    );
-    $form['indexing_throttle']['cron_limit'] = array(
+    ];
+    $form['indexing_throttle']['cron_limit'] = [
       '#type' => 'select',
       '#title' => $this->t('Number of items to index per cron run'),
       '#default_value' => $search_settings->get('index.cron_limit'),
       '#options' => $items,
-      '#description' => $this->t('The maximum number of items indexed in each run of the <a href=":cron">cron maintenance task</a>. If necessary, reduce the number of items to prevent timeouts and memory errors while indexing. Some search page types may have their own setting for this.', array(':cron' => \Drupal::url('system.cron_settings'))),
-    );
+      '#description' => $this->t('The maximum number of items indexed in each run of the <a href=":cron">cron maintenance task</a>. If necessary, reduce the number of items to prevent timeouts and memory errors while indexing. Some search page types may have their own setting for this.', [':cron' => \Drupal::url('system.cron_settings')]),
+    ];
     // Indexing settings:
-    $form['indexing_settings'] = array(
+    $form['indexing_settings'] = [
       '#type' => 'details',
       '#title' => $this->t('Default indexing settings'),
       '#open' => TRUE,
-    );
-    $form['indexing_settings']['info'] = array(
+    ];
+    $form['indexing_settings']['info'] = [
       '#markup' => $this->t("<p>Search pages that use an index may use the default index provided by the Search module, or they may use a different indexing mechanism. These settings are for the default index. <em>Changing these settings will cause the default search index to be rebuilt to reflect the new settings. Searching will continue to work, based on the existing index, but new content won't be indexed until all existing content has been re-indexed.</em></p><p><em>The default settings should be appropriate for the majority of sites.</em></p>")
-    );
-    $form['indexing_settings']['minimum_word_size'] = array(
+    ];
+    $form['indexing_settings']['minimum_word_size'] = [
       '#type' => 'number',
       '#title' => $this->t('Minimum word length to index'),
       '#default_value' => $search_settings->get('index.minimum_word_size'),
       '#min' => 1,
       '#max' => 1000,
       '#description' => $this->t('The minimum character length for a word to be added to the index. Searches must include a keyword of at least this length.'),
-    );
-    $form['indexing_settings']['overlap_cjk'] = array(
+    ];
+    $form['indexing_settings']['overlap_cjk'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Simple CJK handling'),
       '#default_value' => $search_settings->get('index.overlap_cjk'),
       '#description' => $this->t('Whether to apply a simple Chinese/Japanese/Korean tokenizer based on overlapping sequences. Turn this off if you want to use an external preprocessor for this instead. Does not affect other languages.')
-    );
+    ];
 
     // Indexing settings:
-    $form['logging'] = array(
+    $form['logging'] = [
       '#type' => 'details',
       '#title' => $this->t('Logging'),
       '#open' => TRUE,
-    );
+    ];
 
-    $form['logging']['logging'] = array(
+    $form['logging']['logging'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Log searches'),
       '#default_value' => $search_settings->get('logging'),
       '#description' => $this->t('If checked, all searches will be logged. Uncheck to skip logging. Logging may affect performance.'),
-    );
+    ];
 
-    $form['search_pages'] = array(
+    $form['search_pages'] = [
       '#type' => 'details',
       '#title' => $this->t('Search pages'),
       '#open' => TRUE,
-    );
-    $form['search_pages']['add_page'] = array(
+    ];
+    $form['search_pages']['add_page'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('container-inline'),
-      ),
-    );
+      '#attributes' => [
+        'class' => ['container-inline'],
+      ],
+    ];
     // In order to prevent validation errors for the parent form, this cannot be
     // required, see self::validateAddSearchPage().
-    $form['search_pages']['add_page']['search_type'] = array(
+    $form['search_pages']['add_page']['search_type'] = [
       '#type' => 'select',
       '#title' => $this->t('Search page type'),
       '#empty_option' => $this->t('- Choose page type -'),
       '#options' => array_map(function ($definition) {
         return $definition['title'];
       }, $this->searchManager->getDefinitions()),
-    );
-    $form['search_pages']['add_page']['add_search_submit'] = array(
+    ];
+    $form['search_pages']['add_page']['add_search_submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Add search page'),
-      '#validate' => array('::validateAddSearchPage'),
-      '#submit' => array('::submitAddSearchPage'),
-      '#limit_validation_errors' => array(array('search_type')),
-    );
+      '#validate' => ['::validateAddSearchPage'],
+      '#submit' => ['::submitAddSearchPage'],
+      '#limit_validation_errors' => [['search_type']],
+    ];
 
     // Move the listing into the search_pages element.
     $form['search_pages'][$this->entitiesKey] = $form[$this->entitiesKey];
@@ -281,11 +281,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     unset($form[$this->entitiesKey]);
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save configuration'),
       '#button_type' => 'primary',
-    );
+    ];
 
     return $form;
   }
@@ -302,13 +302,13 @@ public function getDefaultOperations(EntityInterface $entity) {
       unset($operations['disable'], $operations['delete']);
     }
     else {
-      $operations['default'] = array(
+      $operations['default'] = [
         'title' => $this->t('Set as default'),
         'url' => Url::fromRoute('entity.search_page.set_default', [
           'search_page' => $entity->id(),
         ]),
         'weight' => 50,
-      );
+      ];
     }
 
     return $operations;
@@ -369,7 +369,7 @@ public function validateAddSearchPage(array &$form, FormStateInterface $form_sta
   public function submitAddSearchPage(array &$form, FormStateInterface $form_state) {
     $form_state->setRedirect(
       'search.add_type',
-      array('search_plugin_id' => $form_state->getValue('search_type'))
+      ['search_plugin_id' => $form_state->getValue('search_type')]
     );
   }
 
diff --git a/core/modules/search/src/SearchPageRepository.php b/core/modules/search/src/SearchPageRepository.php
index 459ea5782c8d55aa728571f8a7db47ead24b6eab..6f4dc64d5c340c67e155af3e32217b8d391c488b 100644
--- a/core/modules/search/src/SearchPageRepository.php
+++ b/core/modules/search/src/SearchPageRepository.php
@@ -105,7 +105,7 @@ public function setDefaultSearchPage(SearchPageInterface $search_page) {
    */
   public function sortSearchPages($search_pages) {
     $entity_type = $this->storage->getEntityType();
-    uasort($search_pages, array($entity_type->getClass(), 'sort'));
+    uasort($search_pages, [$entity_type->getClass(), 'sort']);
     return $search_pages;
   }
 
diff --git a/core/modules/search/src/SearchQuery.php b/core/modules/search/src/SearchQuery.php
index 77ae8ff7361798eea24f997c01756de558e57e37..dbd0534235cc542f68c9cf72aafadde6cb8be160 100644
--- a/core/modules/search/src/SearchQuery.php
+++ b/core/modules/search/src/SearchQuery.php
@@ -97,7 +97,7 @@ class SearchQuery extends SelectExtender {
    *
    * @var array
    */
-  protected $keys = array('positive' => array(), 'negative' => array());
+  protected $keys = ['positive' => [], 'negative' => []];
 
   /**
    * Indicates whether the query conditions are simple or complex (LIKE).
@@ -130,7 +130,7 @@ class SearchQuery extends SelectExtender {
    *
    * @var array
    */
-  protected $words = array();
+  protected $words = [];
 
   /**
    * Multiplier to normalize the keyword score.
@@ -165,14 +165,14 @@ class SearchQuery extends SelectExtender {
    *
    * @see SearchQuery::addScore()
    */
-  protected $scores = array();
+  protected $scores = [];
 
   /**
    * Arguments for the score expressions.
    *
    * @var array
    */
-  protected $scoresArguments = array();
+  protected $scoresArguments = [];
 
   /**
    * The number of 'i.relevance' occurrences in score expressions.
@@ -186,7 +186,7 @@ class SearchQuery extends SelectExtender {
    *
    * @var array
    */
-  protected $multiply = array();
+  protected $multiply = [];
 
   /**
    * Sets the search query expression.
@@ -259,7 +259,7 @@ protected function parseSearchExpression() {
       $words = search_simplify($match[2]);
       // Re-explode in case simplification added more words, except when
       // matching a phrase.
-      $words = $phrase ? array($words) : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
+      $words = $phrase ? [$words] : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
       // Negative matches.
       if ($match[1] == '-') {
         $this->keys['negative'] = array_merge($this->keys['negative'], $words);
@@ -270,7 +270,7 @@ protected function parseSearchExpression() {
         $last = array_pop($this->keys['positive']);
         // Starting a new OR?
         if (!is_array($last)) {
-          $last = array($last);
+          $last = [$last];
         }
         $this->keys['positive'][] = $last;
         $in_or = TRUE;
@@ -374,7 +374,7 @@ protected function parseWord($word) {
     }
 
     // Return matching snippet and number of added words.
-    return array($num_new_scores, $num_valid_words);
+    return [$num_new_scores, $num_valid_words];
   }
 
   /**
@@ -420,7 +420,7 @@ public function prepareAndNormalize() {
     // simple queries, this condition could lead to incorrectly deciding not
     // to continue with the full query.
     if ($this->simple) {
-      $this->having('COUNT(*) >= :matches', array(':matches' => $this->matches));
+      $this->having('COUNT(*) >= :matches', [':matches' => $this->matches]);
     }
 
     // Clone the query object to calculate normalization.
@@ -499,7 +499,7 @@ public function preExecute(SelectInterface $query = NULL) {
    *
    * @return $this
    */
-  public function addScore($score, $arguments = array(), $multiply = FALSE) {
+  public function addScore($score, $arguments = [], $multiply = FALSE) {
     if ($multiply) {
       $i = count($this->multiply);
       // Modify the score expression so it is multiplied by the multiplier,
@@ -590,7 +590,7 @@ public function execute() {
     // Add query metadata.
     $this
       ->addMetaData('normalize', $this->normalize)
-      ->fields('i', array('type', 'sid'));
+      ->fields('i', ['type', 'sid']);
     return $this->query->execute();
   }
 
@@ -618,12 +618,12 @@ public function countQuery() {
     // Remove existing fields and expressions, they are not needed for a count
     // query.
     $fields =& $inner->getFields();
-    $fields = array();
+    $fields = [];
     $expressions =& $inner->getExpressions();
-    $expressions = array();
+    $expressions = [];
 
     // Add sid as the only field and count them as a subquery.
-    $count = db_select($inner->fields('i', array('sid')), NULL, array('target' => 'replica'));
+    $count = db_select($inner->fields('i', ['sid']), NULL, ['target' => 'replica']);
 
     // Add the COUNT() expression.
     $count->addExpression('COUNT(*)');
diff --git a/core/modules/search/src/Tests/SearchAdvancedSearchFormTest.php b/core/modules/search/src/Tests/SearchAdvancedSearchFormTest.php
index 9bd13bdc13e1e8e7ad2d8555e194000f7b62597b..af12df61e450c7151993417fe9b707daaad09b18 100644
--- a/core/modules/search/src/Tests/SearchAdvancedSearchFormTest.php
+++ b/core/modules/search/src/Tests/SearchAdvancedSearchFormTest.php
@@ -19,7 +19,7 @@ class SearchAdvancedSearchFormTest extends SearchTestBase {
   protected function setUp() {
     parent::setUp();
     // Create and log in user.
-    $test_user = $this->drupalCreateUser(array('access content', 'search content', 'use advanced search', 'administer nodes'));
+    $test_user = $this->drupalCreateUser(['access content', 'search content', 'use advanced search', 'administer nodes']);
     $this->drupalLogin($test_user);
 
     // Create initial node.
@@ -44,23 +44,23 @@ function testNodeType() {
     $this->assertNotEqual($dummy_title, $this->node->label(), "Dummy title doesn't equal node title.");
 
     // Search for the dummy title with a GET query.
-    $this->drupalGet('search/node', array('query' => array('keys' => $dummy_title)));
+    $this->drupalGet('search/node', ['query' => ['keys' => $dummy_title]]);
     $this->assertNoText($this->node->label(), 'Basic page node is not found with dummy title.');
 
     // Search for the title of the node with a GET query.
-    $this->drupalGet('search/node', array('query' => array('keys' => $this->node->label())));
+    $this->drupalGet('search/node', ['query' => ['keys' => $this->node->label()]]);
     $this->assertText($this->node->label(), 'Basic page node is found with GET query.');
 
     // Search for the title of the node with a POST query.
-    $edit = array('or' => $this->node->label());
+    $edit = ['or' => $this->node->label()];
     $this->drupalPostForm('search/node', $edit, t('Advanced search'));
     $this->assertText($this->node->label(), 'Basic page node is found with POST query.');
 
     // Search by node type.
-    $this->drupalPostForm('search/node', array_merge($edit, array('type[page]' => 'page')), t('Advanced search'));
+    $this->drupalPostForm('search/node', array_merge($edit, ['type[page]' => 'page']), t('Advanced search'));
     $this->assertText($this->node->label(), 'Basic page node is found with POST query and type:page.');
 
-    $this->drupalPostForm('search/node', array_merge($edit, array('type[article]' => 'article')), t('Advanced search'));
+    $this->drupalPostForm('search/node', array_merge($edit, ['type[article]' => 'article']), t('Advanced search'));
     $this->assertText('search yielded no results', 'Article node is not found with POST query and type:article.');
   }
 
@@ -68,13 +68,13 @@ function testNodeType() {
    * Tests that after submitting the advanced search form, the form is refilled.
    */
   function testFormRefill() {
-    $edit = array(
+    $edit = [
       'keys' => 'cat',
       'or' => 'dog gerbil',
       'phrase' => 'pets are nice',
       'negative' => 'fish snake',
       'type[page]' => 'page',
-    );
+    ];
     $this->drupalPostForm('search/node', $edit, t('Advanced search'));
 
     // Test that the encoded query appears in the page title. Only test the
@@ -85,11 +85,11 @@ function testFormRefill() {
     // Verify that all of the form fields are filled out.
     foreach ($edit as $key => $value) {
       if ($key != 'type[page]') {
-        $elements = $this->xpath('//input[@name=:name]', array(':name' => $key));
+        $elements = $this->xpath('//input[@name=:name]', [':name' => $key]);
         $this->assertTrue(isset($elements[0]) && $elements[0]['value'] == $value, "Field $key is set to $value");
       }
       else {
-        $elements = $this->xpath('//input[@name=:name]', array(':name' => $key));
+        $elements = $this->xpath('//input[@name=:name]', [':name' => $key]);
         $this->assertTrue(isset($elements[0]) && !empty($elements[0]['checked']), "Field $key is checked");
       }
     }
@@ -97,12 +97,12 @@ function testFormRefill() {
     // Now test by submitting the or/not part of the query in the main
     // search box, and verify that the advanced form is not filled out.
     // (It shouldn't be filled out unless you submit values in those fields.)
-    $edit2 = array('keys' => 'cat dog OR gerbil -fish -snake');
+    $edit2 = ['keys' => 'cat dog OR gerbil -fish -snake'];
     $this->drupalPostForm('search/node', $edit2, t('Advanced search'));
     $this->assertText('Search for cat dog OR gerbil -fish -snake');
     foreach ($edit as $key => $value) {
       if ($key != 'type[page]') {
-        $elements = $this->xpath('//input[@name=:name]', array(':name' => $key));
+        $elements = $this->xpath('//input[@name=:name]', [':name' => $key]);
         $this->assertFalse(isset($elements[0]) && $elements[0]['value'] == $value, "Field $key is not set to $value");
       }
     }
diff --git a/core/modules/search/src/Tests/SearchBlockTest.php b/core/modules/search/src/Tests/SearchBlockTest.php
index 7d42a85a4b6b660a143e7ce611635ce8bd7505ae..21afda7f05f5dd72ec3959db0aca2c8c8504014b 100644
--- a/core/modules/search/src/Tests/SearchBlockTest.php
+++ b/core/modules/search/src/Tests/SearchBlockTest.php
@@ -14,13 +14,13 @@ class SearchBlockTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('block');
+  public static $modules = ['block'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $admin_user = $this->drupalCreateUser(array('administer blocks', 'search content'));
+    $admin_user = $this->drupalCreateUser(['administer blocks', 'search content']);
     $this->drupalLogin($admin_user);
   }
 
@@ -46,7 +46,7 @@ public function testSearchFormBlock() {
     $this->assertTrue(empty($elements), 'The search input field does not have empty name attribute.');
 
     // Test a normal search via the block form, from the front page.
-    $terms = array('keys' => 'test');
+    $terms = ['keys' => 'test'];
     $this->submitGetForm('', $terms, t('Search'));
     $this->assertResponse(200);
     $this->assertText('Your search yielded no results');
@@ -72,12 +72,12 @@ public function testSearchFormBlock() {
     $entity_id = $search_page_repository->getDefaultSearchPage();
     $this->assertEqual(
       $this->getUrl(),
-      \Drupal::url('search.view_' . $entity_id, array(), array('query' => array('keys' => $terms['keys']), 'absolute' => TRUE)),
+      \Drupal::url('search.view_' . $entity_id, [], ['query' => ['keys' => $terms['keys']], 'absolute' => TRUE]),
       'Submitted to correct URL.'
     );
 
     // Test an empty search via the block form, from the front page.
-    $terms = array('keys' => '');
+    $terms = ['keys' => ''];
     $this->submitGetForm('', $terms, t('Search'));
     $this->assertResponse(200);
     $this->assertText('Please enter some keywords');
@@ -86,22 +86,22 @@ public function testSearchFormBlock() {
     // submitted empty.
     $this->assertEqual(
       $this->getUrl(),
-      \Drupal::url('search.view_' . $entity_id, array(), array('query' => array('keys' => ''), 'absolute' => TRUE)),
+      \Drupal::url('search.view_' . $entity_id, [], ['query' => ['keys' => ''], 'absolute' => TRUE]),
       'Redirected to correct URL.'
     );
 
     // Test that after entering a too-short keyword in the form, you can then
     // search again with a longer keyword. First test using the block form.
-    $this->submitGetForm('node', array('keys' => $this->randomMachineName(1)), t('Search'));
+    $this->submitGetForm('node', ['keys' => $this->randomMachineName(1)], t('Search'));
     $this->assertText('You must include at least one keyword to match in the content', 'Keyword message is displayed when searching for short word');
     $this->assertNoText(t('Please enter some keywords'), 'With short word entered, no keywords message is not displayed');
-    $this->submitGetForm(NULL, array('keys' => $this->randomMachineName()), t('Search'), 'search-block-form');
+    $this->submitGetForm(NULL, ['keys' => $this->randomMachineName()], t('Search'), 'search-block-form');
     $this->assertNoText('You must include at least one keyword to match in the content', 'Keyword message is not displayed when searching for long word after short word search');
 
     // Same test again, using the search page form for the second search this
     // time.
-    $this->submitGetForm('node', array('keys' => $this->randomMachineName(1)), t('Search'));
-    $this->drupalPostForm(NULL, array('keys' => $this->randomMachineName()), t('Search'), array(), array(), 'search-form');
+    $this->submitGetForm('node', ['keys' => $this->randomMachineName(1)], t('Search'));
+    $this->drupalPostForm(NULL, ['keys' => $this->randomMachineName()], t('Search'), [], [], 'search-form');
     $this->assertNoText('You must include at least one keyword to match in the content', 'Keyword message is not displayed when searching for long word after short word search');
 
   }
diff --git a/core/modules/search/src/Tests/SearchCommentTest.php b/core/modules/search/src/Tests/SearchCommentTest.php
index f67637ffc80e8004ba4795313485497cc4f01059..b0377b796c0c51cd1af024e9c96e5ae766860c9b 100644
--- a/core/modules/search/src/Tests/SearchCommentTest.php
+++ b/core/modules/search/src/Tests/SearchCommentTest.php
@@ -22,7 +22,7 @@ class SearchCommentTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'node', 'comment');
+  public static $modules = ['filter', 'node', 'comment'];
 
   /**
    * Test subject for comments.
@@ -55,17 +55,17 @@ class SearchCommentTest extends SearchTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
       'weight' => 1,
-      'filters' => array(),
-    ));
+      'filters' => [],
+    ]);
     $full_html_format->save();
 
     // Create and log in an administrative user having access to the Full HTML
     // text format.
-    $permissions = array(
+    $permissions = [
       'administer filters',
       $full_html_format->getPermissionName(),
       'administer permissions',
@@ -73,7 +73,7 @@ protected function setUp() {
       'post comments',
       'skip comment approval',
       'access comments',
-    );
+    ];
     $this->adminUser = $this->drupalCreateUser($permissions);
     $this->drupalLogin($this->adminUser);
     // Add a comment field.
@@ -86,15 +86,15 @@ protected function setUp() {
   function testSearchResultsComment() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     // Create basic_html format that escapes all HTML.
-    $basic_html_format = FilterFormat::create(array(
+    $basic_html_format = FilterFormat::create([
       'format' => 'basic_html',
       'name' => 'Basic HTML',
       'weight' => 1,
-      'filters' => array(
-        'filter_html_escape' => array('status' => 1),
-      ),
-      'roles' => array(RoleInterface::AUTHENTICATED_ID),
-    ));
+      'filters' => [
+        'filter_html_escape' => ['status' => 1],
+      ],
+      'roles' => [RoleInterface::AUTHENTICATED_ID],
+    ]);
     $basic_html_format->save();
 
     $comment_body = 'Test comment body';
@@ -105,17 +105,17 @@ function testSearchResultsComment() {
     $field->save();
 
     // Allow anonymous users to search content.
-    $edit = array(
+    $edit = [
       RoleInterface::ANONYMOUS_ID . '[search content]' => 1,
       RoleInterface::ANONYMOUS_ID . '[access comments]' => 1,
       RoleInterface::ANONYMOUS_ID . '[post comments]' => 1,
-    );
+    ];
     $this->drupalPostForm('admin/people/permissions', $edit, t('Save permissions'));
 
     // Create a node.
-    $node = $this->drupalCreateNode(array('type' => 'article'));
+    $node = $this->drupalCreateNode(['type' => 'article']);
     // Post a comment using 'Full HTML' text format.
-    $edit_comment = array();
+    $edit_comment = [];
     $edit_comment['subject[0][value]'] = 'Test comment subject';
     $edit_comment['comment_body[0][value]'] = '<h1>' . $comment_body . '</h1>';
     $full_html_format_id = 'full_html';
@@ -125,7 +125,7 @@ function testSearchResultsComment() {
     // Post a comment with an evil script tag in the comment subject and a
     // script tag nearby a keyword in the comment body. Use the 'FULL HTML' text
     // format so the script tag stored.
-    $edit_comment2 = array();
+    $edit_comment2 = [];
     $edit_comment2['subject[0][value]'] = "<script>alert('subjectkeyword');</script>";
     $edit_comment2['comment_body[0][value]'] = "nearbykeyword<script>alert('somethinggeneric');</script>";
     $edit_comment2['comment_body[0][format]'] = $full_html_format_id;
@@ -133,7 +133,7 @@ function testSearchResultsComment() {
 
     // Post a comment with a keyword inside an evil script tag in the comment
     // body. Use the 'FULL HTML' text format so the script tag is stored.
-    $edit_comment3 = array();
+    $edit_comment3 = [];
     $edit_comment3['subject[0][value]'] = 'asubject';
     $edit_comment3['comment_body[0][value]'] = "<script>alert('insidekeyword');</script>";
     $edit_comment3['comment_body[0][format]'] = $full_html_format_id;
@@ -144,19 +144,19 @@ function testSearchResultsComment() {
     $this->cronRun();
 
     // Search for the comment subject.
-    $edit = array(
+    $edit = [
       'keys' => "'" . $edit_comment['subject[0][value]'] . "'",
-    );
+    ];
     $this->drupalPostForm('search/node', $edit, t('Search'));
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $node2 = $node_storage->load($node->id());
     $this->assertText($node2->label(), 'Node found in search results.');
     $this->assertText($edit_comment['subject[0][value]'], 'Comment subject found in search results.');
 
     // Search for the comment body.
-    $edit = array(
+    $edit = [
       'keys' => "'" . $comment_body . "'",
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Search'));
     $this->assertText($node2->label(), 'Node found in search results.');
 
@@ -166,9 +166,9 @@ function testSearchResultsComment() {
     $this->assertNoEscaped($edit_comment['comment_body[0][value]'], 'HTML in comment body is not escaped.');
 
     // Search for the evil script comment subject.
-    $edit = array(
+    $edit = [
       'keys' => 'subjectkeyword',
-    );
+    ];
     $this->drupalPostForm('search/node', $edit, t('Search'));
 
     // Verify the evil comment subject is escaped in search results.
@@ -226,10 +226,10 @@ function testSearchResultsCommentAccess() {
     $field = FieldConfig::loadByName('node', 'article', 'comment');
     $field->setSetting('preview', DRUPAL_OPTIONAL);
     $field->save();
-    $this->node = $this->drupalCreateNode(array('type' => 'article'));
+    $this->node = $this->drupalCreateNode(['type' => 'article']);
 
     // Post a comment using 'Full HTML' text format.
-    $edit_comment = array();
+    $edit_comment = [];
     $edit_comment['subject[0][value]'] = $this->commentSubject;
     $edit_comment['comment_body[0][value]'] = '<h1>' . $comment_body . '</h1>';
     $this->drupalPostForm('comment/reply/node/' . $this->node->id() . '/comment', $edit_comment, t('Save'));
@@ -277,10 +277,10 @@ function testSearchResultsCommentAccess() {
    * Set permissions for role.
    */
   function setRolePermissions($rid, $access_comments = FALSE, $search_content = TRUE) {
-    $permissions = array(
+    $permissions = [
       'access comments' => $access_comments,
       'search content' => $search_content,
-    );
+    ];
     user_role_change_permissions($rid, $permissions);
   }
 
@@ -293,9 +293,9 @@ function assertCommentAccess($assume_access, $message) {
     $this->cronRun();
 
     // Search for the comment subject.
-    $edit = array(
+    $edit = [
       'keys' => "'" . $this->commentSubject . "'",
-    );
+    ];
     $this->drupalPostForm('search/node', $edit, t('Search'));
 
     if ($assume_access) {
@@ -314,19 +314,19 @@ function assertCommentAccess($assume_access, $message) {
    */
   function testAddNewComment() {
     // Create a node with a short body.
-    $settings = array(
+    $settings = [
       'type' => 'article',
       'title' => 'short title',
-      'body' => array(array('value' => 'short body text')),
-    );
+      'body' => [['value' => 'short body text']],
+    ];
 
-    $user = $this->drupalCreateUser(array(
+    $user = $this->drupalCreateUser([
       'search content',
       'create article content',
       'access content',
       'post comments',
       'access comments',
-    ));
+    ]);
     $this->drupalLogin($user);
 
     $node = $this->drupalCreateNode($settings);
@@ -341,12 +341,12 @@ function testAddNewComment() {
 
     // Search for 'comment'. Should be no results.
     $this->drupalLogin($user);
-    $this->drupalPostForm('search/node', array('keys' => 'comment'), t('Search'));
+    $this->drupalPostForm('search/node', ['keys' => 'comment'], t('Search'));
     $this->assertText(t('Your search yielded no results'));
 
     // Search for the node title. Should be found, and 'Add new comment' should
     // not be part of the search snippet.
-    $this->drupalPostForm('search/node', array('keys' => 'short'), t('Search'));
+    $this->drupalPostForm('search/node', ['keys' => 'short'], t('Search'));
     $this->assertText($node->label(), 'Search for keyword worked');
     $this->assertNoText(t('Add new comment'));
   }
diff --git a/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php b/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
index 9ca87d61987f40ef15fa4a9013c231bd6fe82083..c95b60936593675aa22ff5a42b5b60f4ecad6990 100644
--- a/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
+++ b/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
@@ -17,7 +17,7 @@ class SearchConfigSettingsFormTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'search_extra_type', 'test_page_test');
+  public static $modules = ['block', 'search_extra_type', 'test_page_test'];
 
   /**
    * User who can search and administer search.
@@ -37,7 +37,7 @@ protected function setUp() {
     parent::setUp();
 
     // Log in as a user that can create and search content.
-    $this->searchUser = $this->drupalCreateUser(array('search content', 'administer search', 'administer nodes', 'bypass node access', 'access user profiles', 'administer users', 'administer blocks', 'access site reports'));
+    $this->searchUser = $this->drupalCreateUser(['search content', 'administer search', 'administer nodes', 'bypass node access', 'access user profiles', 'administer users', 'administer blocks', 'access site reports']);
     $this->drupalLogin($this->searchUser);
 
     // Add a single piece of content and index it.
@@ -65,38 +65,38 @@ function testSearchSettingsPage() {
 
     // Test that the settings form displays the correct count of items left to index.
     $this->drupalGet('admin/config/search/pages');
-    $this->assertText(t('There are @count items left to index.', array('@count' => 0)));
+    $this->assertText(t('There are @count items left to index.', ['@count' => 0]));
 
     // Test the re-index button.
-    $this->drupalPostForm('admin/config/search/pages', array(), t('Re-index site'));
+    $this->drupalPostForm('admin/config/search/pages', [], t('Re-index site'));
     $this->assertText(t('Are you sure you want to re-index the site'));
-    $this->drupalPostForm('admin/config/search/pages/reindex', array(), t('Re-index site'));
+    $this->drupalPostForm('admin/config/search/pages/reindex', [], t('Re-index site'));
     $this->assertText(t('All search indexes will be rebuilt'));
     $this->drupalGet('admin/config/search/pages');
     $this->assertText(t('There is 1 item left to index.'));
 
     // Test that the form saves with the default values.
-    $this->drupalPostForm('admin/config/search/pages', array(), t('Save configuration'));
+    $this->drupalPostForm('admin/config/search/pages', [], t('Save configuration'));
     $this->assertText(t('The configuration options have been saved.'), 'Form saves with the default values.');
 
     // Test that the form does not save with an invalid word length.
-    $edit = array(
+    $edit = [
       'minimum_word_size' => $this->randomMachineName(3),
-    );
+    ];
     $this->drupalPostForm('admin/config/search/pages', $edit, t('Save configuration'));
     $this->assertNoText(t('The configuration options have been saved.'), 'Form does not save with an invalid word length.');
 
     // Test logging setting. It should be off by default.
     $text = $this->randomMachineName(5);
-    $this->drupalPostForm('search/node', array('keys' => $text), t('Search'));
+    $this->drupalPostForm('search/node', ['keys' => $text], t('Search'));
     $this->drupalGet('admin/reports/dblog');
     $this->assertNoLink('Searched Content for ' . $text . '.', 'Search was not logged');
 
     // Turn on logging.
-    $edit = array('logging' => TRUE);
+    $edit = ['logging' => TRUE];
     $this->drupalPostForm('admin/config/search/pages', $edit, t('Save configuration'));
     $text = $this->randomMachineName(5);
-    $this->drupalPostForm('search/node', array('keys' => $text), t('Search'));
+    $this->drupalPostForm('search/node', ['keys' => $text], t('Search'));
     $this->drupalGet('admin/reports/dblog');
     $this->assertLink('Searched Content for ' . $text . '.', 0, 'Search was logged');
 
@@ -113,13 +113,13 @@ function testSearchModuleSettingsPage() {
     $this->assertTrue($this->xpath('//select[@id="edit-extra-type-settings-boost"]//option[@value="bi" and @selected="selected"]'), 'Module specific settings are picked up from the default config');
 
     // Change extra type setting and also modify a common search setting.
-    $edit = array(
+    $edit = [
       'extra_type_settings[boost]' => 'ii',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save search page'));
 
     // Ensure that the modifications took effect.
-    $this->assertRaw(t('The %label search page has been updated.', array('%label' => 'Dummy search type')));
+    $this->assertRaw(t('The %label search page has been updated.', ['%label' => 'Dummy search type']));
     $this->drupalGet('admin/config/search/pages/manage/dummy_search_type');
     $this->assertTrue($this->xpath('//select[@id="edit-extra-type-settings-boost"]//option[@value="ii" and @selected="selected"]'), 'Module specific settings can be changed');
   }
@@ -130,20 +130,20 @@ function testSearchModuleSettingsPage() {
   function testSearchModuleDisabling() {
     // Array of search plugins to test: 'keys' are the keywords to search for,
     // and 'text' is the text to assert is on the results page.
-    $plugin_info = array(
-      'node_search' => array(
+    $plugin_info = [
+      'node_search' => [
         'keys' => 'pizza',
         'text' => $this->searchNode->label(),
-      ),
-      'user_search' => array(
+      ],
+      'user_search' => [
         'keys' => $this->searchUser->getUsername(),
         'text' => $this->searchUser->getEmail(),
-      ),
-      'dummy_search_type' => array(
+      ],
+      'dummy_search_type' => [
         'keys' => 'foo',
         'text' => 'Dummy search snippet to display',
-      ),
-    );
+      ],
+    ];
     $plugins = array_keys($plugin_info);
     /** @var $entities \Drupal\search\SearchPageInterface[] */
     $entities = SearchPage::loadMultiple();
@@ -159,7 +159,7 @@ function testSearchModuleDisabling() {
 
       // Run a search from the correct search URL.
       $info = $plugin_info[$entity_id];
-      $this->drupalGet('search/' . $entity->getPath(), array('query' => array('keys' => $info['keys'])));
+      $this->drupalGet('search/' . $entity->getPath(), ['query' => ['keys' => $info['keys']]]);
       $this->assertResponse(200);
       $this->assertNoText('no results', $entity->label() . ' search found results');
       $this->assertText($info['text'], 'Correct search text found');
@@ -174,10 +174,10 @@ function testSearchModuleDisabling() {
 
       // Run a search from the search block on the node page. Verify you get
       // to this plugin's search results page.
-      $terms = array('keys' => $info['keys']);
+      $terms = ['keys' => $info['keys']];
       $this->submitGetForm('node', $terms, t('Search'));
       $current = $this->getURL();
-      $expected = \Drupal::url('search.view_' . $entity->id(), array(), array('query' => array('keys' => $info['keys']), 'absolute' => TRUE));
+      $expected = \Drupal::url('search.view_' . $entity->id(), [], ['query' => ['keys' => $info['keys']], 'absolute' => TRUE]);
       $this->assertEqual( $current, $expected, 'Block redirected to right search page');
 
       // Try an invalid search path, which should 404.
@@ -195,16 +195,16 @@ function testSearchModuleDisabling() {
     // Set the node search as default.
     $this->drupalGet('admin/config/search/pages/manage/node_search/set-default');
 
-    $paths = array(
-      array('path' => 'search/node', 'options' => array('query' => array('keys' => 'pizza'))),
-      array('path' => 'search/node', 'options' => array()),
-    );
+    $paths = [
+      ['path' => 'search/node', 'options' => ['query' => ['keys' => 'pizza']]],
+      ['path' => 'search/node', 'options' => []],
+    ];
 
     foreach ($paths as $item) {
       $this->drupalGet($item['path'], $item['options']);
       foreach ($plugins as $entity_id) {
         $label = $entities[$entity_id]->label();
-        $this->assertText($label, format_string('%label search tab is shown', array('%label' => $label)));
+        $this->assertText($label, format_string('%label search tab is shown', ['%label' => $label]));
       }
     }
   }
@@ -214,7 +214,7 @@ function testSearchModuleDisabling() {
    */
   public function testDefaultSearchPageOrdering() {
     $this->drupalGet('search');
-    $elements = $this->xpath('//*[contains(@class, :class)]//a', array(':class' => 'tabs primary'));
+    $elements = $this->xpath('//*[contains(@class, :class)]//a', [':class' => 'tabs primary']);
     $this->assertIdentical((string) $elements[0]['href'], \Drupal::url('search.view_node_search'));
     $this->assertIdentical((string) $elements[1]['href'], \Drupal::url('search.view_dummy_search_type'));
     $this->assertIdentical((string) $elements[2]['href'], \Drupal::url('search.view_user_search'));
@@ -235,24 +235,24 @@ public function testMultipleSearchPages() {
     $this->assertText(t('No search pages have been configured.'));
 
     // Add a search page.
-    $edit = array();
+    $edit = [];
     $edit['search_type'] = 'search_extra_type_search';
     $this->drupalPostForm(NULL, $edit, t('Add search page'));
     $this->assertTitle('Add new search page | Drupal');
 
-    $first = array();
+    $first = [];
     $first['label'] = $this->randomString();
     $first_id = $first['id'] = strtolower($this->randomMachineName(8));
     $first['path'] = strtolower($this->randomMachineName(8));
     $this->drupalPostForm(NULL, $first, t('Save'));
     $this->assertDefaultSearch($first_id, 'The default page matches the only search page.');
-    $this->assertRaw(t('The %label search page has been added.', array('%label' => $first['label'])));
+    $this->assertRaw(t('The %label search page has been added.', ['%label' => $first['label']]));
 
     // Attempt to add a search page with an existing path.
-    $edit = array();
+    $edit = [];
     $edit['search_type'] = 'search_extra_type_search';
     $this->drupalPostForm(NULL, $edit, t('Add search page'));
-    $edit = array();
+    $edit = [];
     $edit['label'] = $this->randomString();
     $edit['id'] = strtolower($this->randomMachineName(8));
     $edit['path'] = $first['path'];
@@ -260,7 +260,7 @@ public function testMultipleSearchPages() {
     $this->assertText(t('The search page path must be unique.'));
 
     // Add a second search page.
-    $second = array();
+    $second = [];
     $second['label'] = $this->randomString();
     $second_id = $second['id'] = strtolower($this->randomMachineName(8));
     $second['path'] = strtolower($this->randomMachineName(8));
@@ -269,18 +269,18 @@ public function testMultipleSearchPages() {
 
     // Ensure both search pages have their tabs displayed.
     $this->drupalGet('search');
-    $elements = $this->xpath('//*[contains(@class, :class)]//a', array(':class' => 'tabs primary'));
+    $elements = $this->xpath('//*[contains(@class, :class)]//a', [':class' => 'tabs primary']);
     $this->assertIdentical((string) $elements[0]['href'], Url::fromRoute('search.view_' . $first_id)->toString());
     $this->assertIdentical((string) $elements[1]['href'], Url::fromRoute('search.view_' . $second_id)->toString());
 
     // Switch the weight of the search pages and check the order of the tabs.
-    $edit = array(
+    $edit = [
       'entities[' . $first_id . '][weight]' => 10,
       'entities[' . $second_id . '][weight]' => -10,
-    );
+    ];
     $this->drupalPostForm('admin/config/search/pages', $edit, t('Save configuration'));
     $this->drupalGet('search');
-    $elements = $this->xpath('//*[contains(@class, :class)]//a', array(':class' => 'tabs primary'));
+    $elements = $this->xpath('//*[contains(@class, :class)]//a', [':class' => 'tabs primary']);
     $this->assertIdentical((string) $elements[0]['href'], Url::fromRoute('search.view_' . $second_id)->toString());
     $this->assertIdentical((string) $elements[1]['href'], Url::fromRoute('search.view_' . $first_id)->toString());
 
@@ -291,7 +291,7 @@ public function testMultipleSearchPages() {
 
     // Change the default search page.
     $this->clickLink(t('Set as default'));
-    $this->assertRaw(t('The default search page is now %label. Be sure to check the ordering of your search pages.', array('%label' => $second['label'])));
+    $this->assertRaw(t('The default search page is now %label. Be sure to check the ordering of your search pages.', ['%label' => $second['label']]));
     $this->verifySearchPageOperations($first_id, TRUE, TRUE, TRUE, FALSE);
     $this->verifySearchPageOperations($second_id, TRUE, FALSE, FALSE, FALSE);
 
@@ -310,9 +310,9 @@ public function testMultipleSearchPages() {
 
     // Test deleting.
     $this->clickLink(t('Delete'));
-    $this->assertRaw(t('Are you sure you want to delete the search page %label?', array('%label' => $first['label'])));
-    $this->drupalPostForm(NULL, array(), t('Delete'));
-    $this->assertRaw(t('The search page %label has been deleted.', array('%label' => $first['label'])));
+    $this->assertRaw(t('Are you sure you want to delete the search page %label?', ['%label' => $first['label']]));
+    $this->drupalPostForm(NULL, [], t('Delete'));
+    $this->assertRaw(t('The search page %label has been deleted.', ['%label' => $first['label']]));
     $this->verifySearchPageOperations($first_id, FALSE, FALSE, FALSE, FALSE);
   }
 
diff --git a/core/modules/search/src/Tests/SearchEmbedFormTest.php b/core/modules/search/src/Tests/SearchEmbedFormTest.php
index 22da9b611e63fb3466637ccf3c3b80467c51aee1..df5fdfc6c55e8727bc3c08e3c4d02a9f11f73947 100644
--- a/core/modules/search/src/Tests/SearchEmbedFormTest.php
+++ b/core/modules/search/src/Tests/SearchEmbedFormTest.php
@@ -14,7 +14,7 @@ class SearchEmbedFormTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('search_embedded_form');
+  public static $modules = ['search_embedded_form'];
 
   /**
    * Node used for testing.
@@ -34,7 +34,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create a user and a node, and update the search index.
-    $test_user = $this->drupalCreateUser(array('access content', 'search content', 'administer nodes'));
+    $test_user = $this->drupalCreateUser(['access content', 'search content', 'administer nodes']);
     $this->drupalLogin($test_user);
 
     $this->node = $this->drupalCreateNode();
@@ -53,7 +53,7 @@ protected function setUp() {
   function testEmbeddedForm() {
     // First verify we can submit the form from the module's page.
     $this->drupalPostForm('search_embedded_form',
-      array('name' => 'John'),
+      ['name' => 'John'],
       t('Send away'));
     $this->assertText(t('Test form was submitted'), 'Form message appears');
     $count = \Drupal::state()->get('search_embedded_form.submit_count');
@@ -61,10 +61,10 @@ function testEmbeddedForm() {
     $this->submitCount = $count;
 
     // Now verify that we can see and submit the form from the search results.
-    $this->drupalGet('search/node', array('query' => array('keys' => $this->node->label())));
+    $this->drupalGet('search/node', ['query' => ['keys' => $this->node->label()]]);
     $this->assertText(t('Your name'), 'Form is visible');
     $this->drupalPostForm(NULL,
-      array('name' => 'John'),
+      ['name' => 'John'],
       t('Send away'));
     $this->assertText(t('Test form was submitted'), 'Form message appears');
     $count = \Drupal::state()->get('search_embedded_form.submit_count');
@@ -74,7 +74,7 @@ function testEmbeddedForm() {
     // Now verify that if we submit the search form, it doesn't count as
     // our form being submitted.
     $this->drupalPostForm('search',
-      array('keys' => 'foo'),
+      ['keys' => 'foo'],
       t('Search'));
     $this->assertNoText(t('Test form was submitted'), 'Form message does not appear');
     $count = \Drupal::state()->get('search_embedded_form.submit_count');
diff --git a/core/modules/search/src/Tests/SearchLanguageTest.php b/core/modules/search/src/Tests/SearchLanguageTest.php
index cdd0bd4c6ca7b25328b624ffece1c5dfaea317e1..25f269d870a254f49d64aa71f51699e9666b25ec 100644
--- a/core/modules/search/src/Tests/SearchLanguageTest.php
+++ b/core/modules/search/src/Tests/SearchLanguageTest.php
@@ -17,7 +17,7 @@ class SearchLanguageTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Array of nodes available to search.
@@ -30,7 +30,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $test_user = $this->drupalCreateUser(array('access content', 'search content', 'use advanced search', 'administer nodes', 'administer languages', 'access administration pages', 'administer site configuration'));
+    $test_user = $this->drupalCreateUser(['access content', 'search content', 'use advanced search', 'administer nodes', 'administer languages', 'access administration pages', 'administer site configuration']);
     $this->drupalLogin($test_user);
 
     // Add a new language.
@@ -45,38 +45,38 @@ protected function setUp() {
 
     // Create a few page nodes with multilingual body values.
     $default_format = filter_default_format();
-    $nodes = array(
-      array(
+    $nodes = [
+      [
         'title' => 'First node en',
         'type' => 'page',
-        'body' => array(array('value' => $this->randomMachineName(32), 'format' => $default_format)),
+        'body' => [['value' => $this->randomMachineName(32), 'format' => $default_format]],
         'langcode' => 'en',
-      ),
-      array(
+      ],
+      [
         'title' => 'Second node this is the Spanish title',
         'type' => 'page',
-        'body' => array(array('value' => $this->randomMachineName(32), 'format' => $default_format)),
+        'body' => [['value' => $this->randomMachineName(32), 'format' => $default_format]],
         'langcode' => 'es',
-      ),
-      array(
+      ],
+      [
         'title' => 'Third node en',
         'type' => 'page',
-        'body' => array(array('value' => $this->randomMachineName(32), 'format' => $default_format)),
+        'body' => [['value' => $this->randomMachineName(32), 'format' => $default_format]],
         'langcode' => 'en',
-      ),
-    );
+      ],
+    ];
     $this->searchableNodes = [];
     foreach ($nodes as $setting) {
       $this->searchableNodes[] = $this->drupalCreateNode($setting);
     }
 
     // Add English translation to the second node.
-    $translation = $this->searchableNodes[1]->addTranslation('en', array('title' => 'Second node en'));
+    $translation = $this->searchableNodes[1]->addTranslation('en', ['title' => 'Second node en']);
     $translation->body->value = $this->randomMachineName(32);
     $this->searchableNodes[1]->save();
 
     // Add Spanish translation to the third node.
-    $translation = $this->searchableNodes[2]->addTranslation('es', array('title' => 'Third node es'));
+    $translation = $this->searchableNodes[2]->addTranslation('es', ['title' => 'Third node es']);
     $translation->body->value = $this->randomMachineName(32);
     $this->searchableNodes[2]->save();
 
@@ -88,7 +88,7 @@ protected function setUp() {
 
   function testLanguages() {
     // Add predefined language.
-    $edit = array('predefined_langcode' => 'fr');
+    $edit = ['predefined_langcode' => 'fr'];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
     $this->assertText('French', 'Language added successfully.');
 
@@ -99,11 +99,11 @@ function testLanguages() {
     $this->assertText(t('French'), 'French is a possible choice.');
 
     // Ensure selecting no language does not make the query different.
-    $this->drupalPostForm('search/node', array(), t('Advanced search'));
+    $this->drupalPostForm('search/node', [], t('Advanced search'));
     $this->assertUrl(\Drupal::url('search.view_node_search', [], ['query' => ['keys' => ''], 'absolute' => TRUE]), [], 'Correct page redirection, no language filtering.');
 
     // Pick French and ensure it is selected.
-    $edit = array('language[fr]' => TRUE);
+    $edit = ['language[fr]' => TRUE];
     $this->drupalPostForm('search/node', $edit, t('Advanced search'));
     // Get the redirected URL.
     $url = $this->getUrl();
@@ -112,7 +112,7 @@ function testLanguages() {
     $this->assertTrue(strpos($query_string, '=language:fr') !== FALSE, 'Language filter language:fr add to the query string.');
 
     // Search for keyword node and language filter as Spanish.
-    $edit = array('keys' => 'node', 'language[es]' => TRUE);
+    $edit = ['keys' => 'node', 'language[es]' => TRUE];
     $this->drupalPostForm('search/node', $edit, t('Advanced search'));
     // Check for Spanish results.
     $this->assertLink('Second node this is the Spanish title', 0, 'Second node Spanish title found in search results');
@@ -126,12 +126,12 @@ function testLanguages() {
     $path = 'admin/config/regional/language';
     $this->drupalGet($path);
     $this->assertFieldChecked('edit-site-default-language-en', 'Default language updated.');
-    $edit = array(
+    $edit = [
       'site_default_language' => 'fr',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save configuration'));
     $this->assertNoFieldChecked('edit-site-default-language-en', 'Default language updated.');
-    $this->drupalPostForm('admin/config/regional/language/delete/en', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/language/delete/en', [], t('Delete'));
   }
 
 }
diff --git a/core/modules/search/src/Tests/SearchNodeUpdateAndDeletionTest.php b/core/modules/search/src/Tests/SearchNodeUpdateAndDeletionTest.php
index e73ca8623ac0bc18e6171035a1e7ed3eba6a8a7c..0f053d24bc8cc969e381a8b8d8354ba05eb57c1d 100644
--- a/core/modules/search/src/Tests/SearchNodeUpdateAndDeletionTest.php
+++ b/core/modules/search/src/Tests/SearchNodeUpdateAndDeletionTest.php
@@ -14,7 +14,7 @@ class SearchNodeUpdateAndDeletionTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array();
+  public static $modules = [];
 
   /**
    * A user with permission to access and search content.
@@ -27,7 +27,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create a test user and log in.
-    $this->testUser = $this->drupalCreateUser(array('access content', 'search content'));
+    $this->testUser = $this->drupalCreateUser(['access content', 'search content']);
     $this->drupalLogin($this->testUser);
   }
 
@@ -36,10 +36,10 @@ protected function setUp() {
    */
   function testSearchIndexUpdateOnNodeChange() {
     // Create a node.
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'title' => 'Someone who says Ni!',
-      'body' => array(array('value' => "We are the knights who say Ni!")),
-      'type' => 'page'));
+      'body' => [['value' => "We are the knights who say Ni!"]],
+      'type' => 'page']);
 
     $node_search_plugin = $this->container->get('plugin.manager.search')->createInstance('node_search');
     // Update the search index.
@@ -47,7 +47,7 @@ function testSearchIndexUpdateOnNodeChange() {
     search_update_totals();
 
     // Search the node to verify it appears in search results
-    $edit = array('keys' => 'knights');
+    $edit = ['keys' => 'knights'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText($node->label());
 
@@ -60,7 +60,7 @@ function testSearchIndexUpdateOnNodeChange() {
     search_update_totals();
 
     // Search again to verify the new text appears in test results.
-    $edit = array('keys' => 'shrubbery');
+    $edit = ['keys' => 'shrubbery'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText($node->label());
   }
@@ -70,10 +70,10 @@ function testSearchIndexUpdateOnNodeChange() {
    */
   function testSearchIndexUpdateOnNodeDeletion() {
     // Create a node.
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'title' => 'No dragons here',
-      'body' => array(array('value' => 'Again: No dragons here')),
-      'type' => 'page'));
+      'body' => [['value' => 'Again: No dragons here']],
+      'type' => 'page']);
 
     $node_search_plugin = $this->container->get('plugin.manager.search')->createInstance('node_search');
     // Update the search index.
@@ -81,12 +81,12 @@ function testSearchIndexUpdateOnNodeDeletion() {
     search_update_totals();
 
     // Search the node to verify it appears in search results
-    $edit = array('keys' => 'dragons');
+    $edit = ['keys' => 'dragons'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText($node->label());
 
     // Get the node info from the search index tables.
-    $search_index_dataset = db_query("SELECT sid FROM {search_index} WHERE type = 'node_search' AND  word = :word", array(':word' => 'dragons'))
+    $search_index_dataset = db_query("SELECT sid FROM {search_index} WHERE type = 'node_search' AND  word = :word", [':word' => 'dragons'])
       ->fetchField();
     $this->assertNotEqual($search_index_dataset, FALSE, t('Node info found on the search_index'));
 
@@ -94,7 +94,7 @@ function testSearchIndexUpdateOnNodeDeletion() {
     $node->delete();
 
     // Check if the node info is gone from the search table.
-    $search_index_dataset = db_query("SELECT sid FROM {search_index} WHERE type = 'node_search' AND  word = :word", array(':word' => 'dragons'))
+    $search_index_dataset = db_query("SELECT sid FROM {search_index} WHERE type = 'node_search' AND  word = :word", [':word' => 'dragons'])
       ->fetchField();
     $this->assertFalse($search_index_dataset, t('Node info successfully removed from search_index'));
 
diff --git a/core/modules/search/src/Tests/SearchNumberMatchingTest.php b/core/modules/search/src/Tests/SearchNumberMatchingTest.php
index a6ad05728680d18cade199daef76ef575b55367e..de627e80f04e1b95ba125c00682f7a3cf86a8f24 100644
--- a/core/modules/search/src/Tests/SearchNumberMatchingTest.php
+++ b/core/modules/search/src/Tests/SearchNumberMatchingTest.php
@@ -27,7 +27,7 @@ class SearchNumberMatchingTest extends SearchTestBase {
    *
    * @var string[]
    */
-  protected $numbers = array(
+  protected $numbers = [
     '123456789',
     '12/34/56789',
     '12.3456789',
@@ -35,7 +35,7 @@ class SearchNumberMatchingTest extends SearchTestBase {
     '123,456,789',
     '-123456789',
     '0123456789',
-  );
+  ];
 
   /**
    * An array of nodes created for testing purposes.
@@ -47,15 +47,15 @@ class SearchNumberMatchingTest extends SearchTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->testUser = $this->drupalCreateUser(array('search content', 'access content', 'administer nodes', 'access site reports'));
+    $this->testUser = $this->drupalCreateUser(['search content', 'access content', 'administer nodes', 'access site reports']);
     $this->drupalLogin($this->testUser);
 
     foreach ($this->numbers as $num) {
-      $info = array(
-        'body' => array(array('value' => $num)),
+      $info = [
+        'body' => [['value' => $num]],
         'type' => 'page',
         'language' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-      );
+      ];
       $this->nodes[] = $this->drupalCreateNode($info);
     }
 
@@ -75,9 +75,9 @@ function testNumberSearching() {
       // Verify that the node title does not appear on the search page
       // with a dummy search.
       $this->drupalPostForm('search/node',
-        array('keys' => 'foo'),
+        ['keys' => 'foo'],
         t('Search'));
-      $this->assertNoText($node->label(), format_string('%number: node title not shown in dummy search', array('%number' => $i)));
+      $this->assertNoText($node->label(), format_string('%number: node title not shown in dummy search', ['%number' => $i]));
 
       // Now verify that we can find node i by searching for any of the
       // numbers.
@@ -88,9 +88,9 @@ function testNumberSearching() {
         $number = ltrim($number, '-');
 
         $this->drupalPostForm('search/node',
-          array('keys' => $number),
+          ['keys' => $number],
           t('Search'));
-        $this->assertText($node->label(), format_string('%i: node title shown (search found the node) in search for number %number', array('%i' => $i, '%number' => $number)));
+        $this->assertText($node->label(), format_string('%i: node title shown (search found the node) in search for number %number', ['%i' => $i, '%number' => $number]));
       }
     }
 
diff --git a/core/modules/search/src/Tests/SearchNumbersTest.php b/core/modules/search/src/Tests/SearchNumbersTest.php
index 30d3906f8139694e391efedb6f3bacbfd30f7d12..7034c5e7e3df94a27ac4a06591328a72bceef496 100644
--- a/core/modules/search/src/Tests/SearchNumbersTest.php
+++ b/core/modules/search/src/Tests/SearchNumbersTest.php
@@ -26,7 +26,7 @@ class SearchNumbersTest extends SearchTestBase {
    *
    * @var string[]
    */
-  protected $numbers = array(
+  protected $numbers = [
     'ISBN' => '978-0446365383',
     'UPC' => '036000 291452',
     'EAN bar code' => '5901234123457',
@@ -41,7 +41,7 @@ class SearchNumbersTest extends SearchTestBase {
     'over fifty characters' => '666666666666666666666666666666666666666666666666666666666666',
     'date' => '01/02/2009',
     'commas' => '987,654,321',
-  );
+  ];
 
   /**
    * An array of nodes created for testing purposes.
@@ -53,16 +53,16 @@ class SearchNumbersTest extends SearchTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->testUser = $this->drupalCreateUser(array('search content', 'access content', 'administer nodes', 'access site reports'));
+    $this->testUser = $this->drupalCreateUser(['search content', 'access content', 'administer nodes', 'access site reports']);
     $this->drupalLogin($this->testUser);
 
     foreach ($this->numbers as $doc => $num) {
-      $info = array(
-        'body' => array(array('value' => $num)),
+      $info = [
+        'body' => [['value' => $num]],
         'type' => 'page',
         'language' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
         'title' => $doc . ' number',
-      );
+      ];
       $this->nodes[$doc] = $this->drupalCreateNode($info);
     }
 
@@ -88,16 +88,16 @@ function testNumberSearching() {
       // Verify that the node title does not appear on the search page
       // with a dummy search.
       $this->drupalPostForm('search/node',
-        array('keys' => 'foo'),
+        ['keys' => 'foo'],
         t('Search'));
       $this->assertNoText($node->label(), $type . ': node title not shown in dummy search');
 
       // Verify that the node title does appear as a link on the search page
       // when searching for the number.
       $this->drupalPostForm('search/node',
-        array('keys' => $number),
+        ['keys' => $number],
         t('Search'));
-      $this->assertText($node->label(), format_string('%type: node title shown (search found the node) in search for number %number.', array('%type' => $type, '%number' => $number)));
+      $this->assertText($node->label(), format_string('%type: node title shown (search found the node) in search for number %number.', ['%type' => $type, '%number' => $number]));
     }
   }
 
diff --git a/core/modules/search/src/Tests/SearchPageCacheTagsTest.php b/core/modules/search/src/Tests/SearchPageCacheTagsTest.php
index 667b2135f8665e424f8bda054d523bee9c30a7ee..5eafa27f99bf66521e883787958eb957de836002 100644
--- a/core/modules/search/src/Tests/SearchPageCacheTagsTest.php
+++ b/core/modules/search/src/Tests/SearchPageCacheTagsTest.php
@@ -37,7 +37,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create user.
-    $this->searchingUser = $this->drupalCreateUser(array('search content', 'access user profiles'));
+    $this->searchingUser = $this->drupalCreateUser(['search content', 'access user profiles']);
 
     // Create a node and update the search index.
     $this->node = $this->drupalCreateNode(['title' => 'bike shed shop']);
@@ -60,7 +60,7 @@ function testSearchText() {
     $this->assertCacheTag('node_list');
 
     // Node search results.
-    $edit = array();
+    $edit = [];
     $edit['keys'] = 'bike shed';
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText('bike shed shop');
@@ -182,7 +182,7 @@ public function testSearchTagsBubbling() {
     // Node search results for shop, should return node:1 (bike shed shop) and
     // node:2 (Llama shop). The related authors cache tags should be visible as
     // well.
-    $edit = array();
+    $edit = [];
     $edit['keys'] = 'shop';
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText('bike shed shop');
@@ -200,7 +200,7 @@ public function testSearchTagsBubbling() {
     // Only get the new node in the search results, should result in node:1,
     // node:2 and user:3 as cache tags even though only node:1 is shown. This is
     // because node:2 is reference in node:1 as an entity reference.
-    $edit = array();
+    $edit = [];
     $edit['keys'] = 'Llama';
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText('Llama shop');
diff --git a/core/modules/search/src/Tests/SearchPageTextTest.php b/core/modules/search/src/Tests/SearchPageTextTest.php
index db33d85c0b3398de22a4ca00b50dd21519a1174c..9815e307ce98408480490f7df0acf575141c1751 100644
--- a/core/modules/search/src/Tests/SearchPageTextTest.php
+++ b/core/modules/search/src/Tests/SearchPageTextTest.php
@@ -32,7 +32,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create user.
-    $this->searchingUser = $this->drupalCreateUser(array('search content', 'access user profiles', 'use advanced search'));
+    $this->searchingUser = $this->drupalCreateUser(['search content', 'access user profiles', 'use advanced search']);
     $this->drupalPlaceBlock('local_tasks_block');
     $this->drupalPlaceBlock('page_title_block');
   }
@@ -43,7 +43,7 @@ protected function setUp() {
    * This is a regression test for https://www.drupal.org/node/2338081
    */
   function testSearchLabelXSS() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer search')));
+    $this->drupalLogin($this->drupalCreateUser(['administer search']));
 
     $keys['label'] = '<script>alert("Dont Panic");</script>';
     $this->drupalPostForm('admin/config/search/pages/manage/node_search', $keys, t('Save search page'));
@@ -63,14 +63,14 @@ function testSearchText() {
     $this->assertText(t('Search'));
     $this->assertTitle(t('Search') . ' | Drupal', 'Search page title is correct');
 
-    $edit = array();
+    $edit = [];
     $search_terms = 'bike shed ' . $this->randomMachineName();
     $edit['keys'] = $search_terms;
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText('search yielded no results');
     $this->assertText(t('Search'));
     $title_source = 'Search for @keywords | Drupal';
-    $this->assertTitle(t($title_source, array('@keywords' => Unicode::truncate($search_terms, 60, TRUE, TRUE))), 'Search page title is correct');
+    $this->assertTitle(t($title_source, ['@keywords' => Unicode::truncate($search_terms, 60, TRUE, TRUE)]), 'Search page title is correct');
     $this->assertNoText('Node', 'Erroneous tab and breadcrumb text is not present');
     $this->assertNoText(t('Node'), 'Erroneous translated tab and breadcrumb text is not present');
     $this->assertText(t('Content'), 'Tab and breadcrumb text is present');
@@ -80,23 +80,23 @@ function testSearchText() {
     $this->assertText('Use upper-case OR to get more results', 'Correct text is on content search help page');
 
     // Search for a longer text, and see that it is in the title, truncated.
-    $edit = array();
+    $edit = [];
     $search_terms = 'Every word is like an unnecessary stain on silence and nothingness.';
     $edit['keys'] = $search_terms;
     $this->drupalPostForm('search/node', $edit, t('Search'));
-    $this->assertTitle(t($title_source, array('@keywords' => 'Every word is like an unnecessary stain on silence and…')), 'Search page title is correct');
+    $this->assertTitle(t($title_source, ['@keywords' => 'Every word is like an unnecessary stain on silence and…']), 'Search page title is correct');
 
     // Search for a string with a lot of special characters.
     $search_terms = 'Hear nothing > "see nothing" `feel' . " '1982.";
     $edit['keys'] = $search_terms;
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $actual_title = (string) current($this->xpath('//title'));
-    $this->assertEqual($actual_title, Html::decodeEntities(t($title_source, array('@keywords' => Unicode::truncate($search_terms, 60, TRUE, TRUE)))), 'Search page title is correct');
+    $this->assertEqual($actual_title, Html::decodeEntities(t($title_source, ['@keywords' => Unicode::truncate($search_terms, 60, TRUE, TRUE)])), 'Search page title is correct');
 
     $edit['keys'] = $this->searchingUser->getUsername();
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText(t('Search'));
-    $this->assertTitle(t($title_source, array('@keywords' => Unicode::truncate($this->searchingUser->getUsername(), 60, TRUE, TRUE))));
+    $this->assertTitle(t($title_source, ['@keywords' => Unicode::truncate($this->searchingUser->getUsername(), 60, TRUE, TRUE)]));
 
     $this->clickLink('Search help');
     $this->assertText('Search help', 'Correct title is on search help page');
@@ -105,14 +105,14 @@ function testSearchText() {
     // Test that search keywords containing slashes are correctly loaded
     // from the GET params and displayed in the search form.
     $arg = $this->randomMachineName() . '/' . $this->randomMachineName();
-    $this->drupalGet('search/node', array('query' => array('keys' => $arg)));
+    $this->drupalGet('search/node', ['query' => ['keys' => $arg]]);
     $input = $this->xpath("//input[@id='edit-keys' and @value='{$arg}']");
     $this->assertFalse(empty($input), 'Search keys with a / are correctly set as the default value in the search box.');
 
     // Test a search input exceeding the limit of AND/OR combinations to test
     // the Denial-of-Service protection.
     $limit = $this->config('search.settings')->get('and_or_limit');
-    $keys = array();
+    $keys = [];
     for ($i = 0; $i < $limit + 1; $i++) {
       // Use a key of 4 characters to ensure we never generate 'AND' or 'OR'.
       $keys[] = $this->randomMachineName(4);
@@ -122,40 +122,40 @@ function testSearchText() {
     }
     $edit['keys'] = implode(' ', $keys);
     $this->drupalPostForm('search/node', $edit, t('Search'));
-    $this->assertRaw(t('Your search used too many AND/OR expressions. Only the first @count terms were included in this search.', array('@count' => $limit)));
+    $this->assertRaw(t('Your search used too many AND/OR expressions. Only the first @count terms were included in this search.', ['@count' => $limit]));
 
     // Test that a search on Node or User with no keywords entered generates
     // the "Please enter some keywords" message.
-    $this->drupalPostForm('search/node', array(), t('Search'));
+    $this->drupalPostForm('search/node', [], t('Search'));
     $this->assertText(t('Please enter some keywords'), 'With no keywords entered, message is displayed on node page');
-    $this->drupalPostForm('search/user', array(), t('Search'));
+    $this->drupalPostForm('search/user', [], t('Search'));
     $this->assertText(t('Please enter some keywords'), 'With no keywords entered, message is displayed on user page');
 
     // Make sure the "Please enter some keywords" message is NOT displayed if
     // you use "or" words or phrases in Advanced Search.
-    $this->drupalPostForm('search/node', array('or' => $this->randomMachineName() . ' ' . $this->randomMachineName()), t('Advanced search'));
+    $this->drupalPostForm('search/node', ['or' => $this->randomMachineName() . ' ' . $this->randomMachineName()], t('Advanced search'));
     $this->assertNoText(t('Please enter some keywords'), 'With advanced OR keywords entered, no keywords message is not displayed on node page');
-    $this->drupalPostForm('search/node', array('phrase' => '"' . $this->randomMachineName() . '" "' . $this->randomMachineName() . '"'), t('Advanced search'));
+    $this->drupalPostForm('search/node', ['phrase' => '"' . $this->randomMachineName() . '" "' . $this->randomMachineName() . '"'], t('Advanced search'));
     $this->assertNoText(t('Please enter some keywords'), 'With advanced phrase entered, no keywords message is not displayed on node page');
 
     // Verify that if you search for a too-short keyword, you get the right
     // message, and that if after that you search for a longer keyword, you
     // do not still see the message.
-    $this->drupalPostForm('search/node', array('keys' => $this->randomMachineName(1)), t('Search'));
+    $this->drupalPostForm('search/node', ['keys' => $this->randomMachineName(1)], t('Search'));
     $this->assertText('You must include at least one keyword', 'Keyword message is displayed when searching for short word');
     $this->assertNoText(t('Please enter some keywords'), 'With short word entered, no keywords message is not displayed');
-    $this->drupalPostForm(NULL, array('keys' => $this->randomMachineName()), t('Search'));
+    $this->drupalPostForm(NULL, ['keys' => $this->randomMachineName()], t('Search'));
     $this->assertNoText('You must include at least one keyword', 'Keyword message is not displayed when searching for long word after short word search');
 
     // Test that if you search for a URL with .. in it, you still end up at
     // the search page. See issue https://www.drupal.org/node/890058.
-    $this->drupalPostForm('search/node', array('keys' => '../../admin'), t('Search'));
+    $this->drupalPostForm('search/node', ['keys' => '../../admin'], t('Search'));
     $this->assertResponse(200, 'Searching for ../../admin with non-admin user does not lead to a 403 error');
     $this->assertText('no results', 'Searching for ../../admin with non-admin user gives you a no search results page');
 
     // Test that if you search for a URL starting with "./", you still end up
     // at the search page. See issue https://www.drupal.org/node/1421560.
-    $this->drupalPostForm('search/node', array('keys' => '.something'), t('Search'));
+    $this->drupalPostForm('search/node', ['keys' => '.something'], t('Search'));
     $this->assertResponse(200, 'Searching for .something does not lead to a 403 error');
     $this->assertText('no results', 'Searching for .something gives you a no search results page');
   }
diff --git a/core/modules/search/src/Tests/SearchPreprocessLangcodeTest.php b/core/modules/search/src/Tests/SearchPreprocessLangcodeTest.php
index 38cb3508e0e0cd43c49e79198266e331086899b9..322ba2288981a02395007dd09fb878338ed731eb 100644
--- a/core/modules/search/src/Tests/SearchPreprocessLangcodeTest.php
+++ b/core/modules/search/src/Tests/SearchPreprocessLangcodeTest.php
@@ -14,7 +14,7 @@ class SearchPreprocessLangcodeTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('search_langcode_test');
+  public static $modules = ['search_langcode_test'];
 
   /**
    * Test node for searching.
@@ -26,12 +26,12 @@ class SearchPreprocessLangcodeTest extends SearchTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $web_user = $this->drupalCreateUser(array(
+    $web_user = $this->drupalCreateUser([
       'create page content',
       'edit own page content',
       'search content',
       'use advanced search',
-    ));
+    ]);
     $this->drupalLogin($web_user);
   }
 
@@ -40,7 +40,7 @@ protected function setUp() {
    */
   function testPreprocessLangcode() {
     // Create a node.
-    $this->node = $this->drupalCreateNode(array('body' => array(array()), 'langcode' => 'en'));
+    $this->node = $this->drupalCreateNode(['body' => [[]], 'langcode' => 'en']);
 
     // First update the index. This does the initial processing.
     $this->container->get('plugin.manager.search')->createInstance('node_search')->updateIndex();
@@ -53,7 +53,7 @@ function testPreprocessLangcode() {
     // Search for the additional text that is added by the preprocess
     // function. If you search for text that is in the node, preprocess is
     // not invoked on the node during the search excerpt generation.
-    $edit = array('or' => 'Additional text');
+    $edit = ['or' => 'Additional text'];
     $this->drupalPostForm('search/node', $edit, t('Advanced search'));
 
     // Checks if the langcode message has been set by hook_search_preprocess().
@@ -65,11 +65,11 @@ function testPreprocessLangcode() {
    */
   function testPreprocessStemming() {
     // Create a node.
-    $this->node = $this->drupalCreateNode(array(
+    $this->node = $this->drupalCreateNode([
       'title' => 'we are testing',
-      'body' => array(array()),
+      'body' => [[]],
       'langcode' => 'en',
-    ));
+    ]);
 
     // First update the index. This does the initial processing.
     $this->container->get('plugin.manager.search')->createInstance('node_search')->updateIndex();
@@ -80,7 +80,7 @@ function testPreprocessStemming() {
     search_update_totals();
 
     // Search for the title of the node with a POST query.
-    $edit = array('or' => 'testing');
+    $edit = ['or' => 'testing'];
     $this->drupalPostForm('search/node', $edit, t('Advanced search'));
 
     // Check if the node has been found.
@@ -88,7 +88,7 @@ function testPreprocessStemming() {
     $this->assertText('we are testing');
 
     // Search for the same node using a different query.
-    $edit = array('or' => 'test');
+    $edit = ['or' => 'test'];
     $this->drupalPostForm('search/node', $edit, t('Advanced search'));
 
     // Check if the node has been found.
diff --git a/core/modules/search/src/Tests/SearchQueryAlterTest.php b/core/modules/search/src/Tests/SearchQueryAlterTest.php
index 0cb473f5f0bedec829a98b0d4183d92946970756..133b0f3d7ed9007ec987eb0789ea853db9e3f228 100644
--- a/core/modules/search/src/Tests/SearchQueryAlterTest.php
+++ b/core/modules/search/src/Tests/SearchQueryAlterTest.php
@@ -13,22 +13,22 @@ class SearchQueryAlterTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('search_query_alter');
+  public static $modules = ['search_query_alter'];
 
   /**
    * Tests that the query alter works.
    */
   function testQueryAlter() {
     // Log in with sufficient privileges.
-    $this->drupalLogin($this->drupalCreateUser(array('create page content', 'search content')));
+    $this->drupalLogin($this->drupalCreateUser(['create page content', 'search content']));
 
     // Create a node and an article with the same keyword. The query alter
     // test module will alter the query so only articles should be returned.
-    $data = array(
+    $data = [
       'type' => 'page',
       'title' => 'test page',
-      'body' => array(array('value' => 'pizza')),
-    );
+      'body' => [['value' => 'pizza']],
+    ];
     $this->drupalCreateNode($data);
 
     $data['type'] = 'article';
@@ -40,7 +40,7 @@ function testQueryAlter() {
     search_update_totals();
 
     // Search for the body keyword 'pizza'.
-    $this->drupalPostForm('search/node', array('keys' => 'pizza'), t('Search'));
+    $this->drupalPostForm('search/node', ['keys' => 'pizza'], t('Search'));
     // The article should be there but not the page.
     $this->assertText('article', 'Article is in search results');
     $this->assertNoText('page', 'Page is not in search results');
diff --git a/core/modules/search/src/Tests/SearchRankingTest.php b/core/modules/search/src/Tests/SearchRankingTest.php
index 2045233e16d7f8d2fec99532d41a5ffd2bf4932a..28241d2af2773f5611d8e8f066a8c4a54fdb72b5 100644
--- a/core/modules/search/src/Tests/SearchRankingTest.php
+++ b/core/modules/search/src/Tests/SearchRankingTest.php
@@ -29,7 +29,7 @@ class SearchRankingTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('statistics', 'comment');
+  public static $modules = ['statistics', 'comment'];
 
   protected function setUp() {
     parent::setUp();
@@ -38,7 +38,7 @@ protected function setUp() {
     $this->nodeSearch = SearchPage::load('node_search');
 
     // Log in with sufficient privileges.
-    $this->drupalLogin($this->drupalCreateUser(array('post comments', 'skip comment approval', 'create page content', 'administer search')));
+    $this->drupalLogin($this->drupalCreateUser(['post comments', 'skip comment approval', 'create page content', 'administer search']));
   }
 
   public function testRankings() {
@@ -46,24 +46,24 @@ public function testRankings() {
     $this->addDefaultCommentField('node', 'page');
 
     // Build a list of the rankings to test.
-    $node_ranks = array('sticky', 'promote', 'relevance', 'recent', 'comments', 'views');
+    $node_ranks = ['sticky', 'promote', 'relevance', 'recent', 'comments', 'views'];
 
     // Create nodes for testing.
-    $nodes = array();
+    $nodes = [];
     foreach ($node_ranks as $node_rank) {
-      $settings = array(
+      $settings = [
         'type' => 'page',
-        'comment' => array(array(
+        'comment' => [[
           'status' => CommentItemInterface::HIDDEN,
-        )),
+        ]],
         'title' => 'Drupal rocks',
-        'body' => array(array('value' => "Drupal's search rocks")),
+        'body' => [['value' => "Drupal's search rocks"]],
         // Node is one day old.
         'created' => REQUEST_TIME - 24 * 3600,
         'sticky' => 0,
         'promote' => 0,
-      );
-      foreach (array(0, 1) as $num) {
+      ];
+      foreach ([0, 1] as $num) {
         if ($num == 1) {
           switch ($node_rank) {
             case 'sticky':
@@ -87,7 +87,7 @@ public function testRankings() {
     }
 
     // Add a comment to one of the nodes.
-    $edit = array();
+    $edit = [];
     $edit['subject[0][value]'] = 'my comment title';
     $edit['comment_body[0][value]'] = 'some random comment';
     $this->drupalGet('comment/reply/node/' . $nodes['comments'][1]->id() . '/comment');
@@ -102,7 +102,7 @@ public function testRankings() {
     // counter for this node.
     $nid = $nodes['views'][1]->id();
     db_insert('node_counter')
-      ->fields(array('totalcount' => 5, 'daycount' => 5, 'timestamp' => REQUEST_TIME, 'nid' => $nid))
+      ->fields(['totalcount' => 5, 'daycount' => 5, 'timestamp' => REQUEST_TIME, 'nid' => $nid])
       ->execute();
 
     // Run cron to update the search index and comment/statistics totals.
@@ -118,7 +118,7 @@ public function testRankings() {
     }
 
     // Test each of the possible rankings.
-    $edit = array();
+    $edit = [];
     foreach ($node_ranks as $node_rank) {
       // Enable the ranking we are testing.
       $edit['rankings[' . $node_rank . '][value]'] = 10;
@@ -129,7 +129,7 @@ public function testRankings() {
       // Reload the plugin to get the up-to-date values.
       $this->nodeSearch = SearchPage::load('node_search');
       // Do the search and assert the results.
-      $this->nodeSearch->getPlugin()->setSearch('rocks', array(), array());
+      $this->nodeSearch->getPlugin()->setSearch('rocks', [], []);
       $set = $this->nodeSearch->getPlugin()->execute();
       $this->assertEqual($set[0]['node']->id(), $nodes[$node_rank][1]->id(), 'Search ranking "' . $node_rank . '" order.');
 
@@ -147,14 +147,14 @@ public function testRankings() {
 
     // Try with sticky, then promoted. This is a test for issue
     // https://www.drupal.org/node/771596.
-    $node_ranks = array(
+    $node_ranks = [
       'sticky' => 10,
       'promote' => 1,
       'relevance' => 0,
       'recent' => 0,
       'comments' => 0,
       'views' => 0,
-    );
+    ];
     $configuration = $this->nodeSearch->getPlugin()->getConfiguration();
     foreach ($node_ranks as $var => $value) {
       $configuration['rankings'][$var] = $value;
@@ -164,7 +164,7 @@ public function testRankings() {
 
     // Do the search and assert the results. The sticky node should show up
     // first, then the promoted node, then all the rest.
-    $this->nodeSearch->getPlugin()->setSearch('rocks', array(), array());
+    $this->nodeSearch->getPlugin()->setSearch('rocks', [], []);
     $set = $this->nodeSearch->getPlugin()->execute();
     $this->assertEqual($set[0]['node']->id(), $nodes['sticky'][1]->id(), 'Search ranking for sticky first worked.');
     $this->assertEqual($set[1]['node']->id(), $nodes['promote'][1]->id(), 'Search ranking for promoted second worked.');
@@ -172,14 +172,14 @@ public function testRankings() {
     // Try with recent, then comments. This is a test for issues
     // https://www.drupal.org/node/771596 and
     // https://www.drupal.org/node/303574.
-    $node_ranks = array(
+    $node_ranks = [
       'sticky' => 0,
       'promote' => 0,
       'relevance' => 0,
       'recent' => 10,
       'comments' => 1,
       'views' => 0,
-    );
+    ];
     $configuration = $this->nodeSearch->getPlugin()->getConfiguration();
     foreach ($node_ranks as $var => $value) {
       $configuration['rankings'][$var] = $value;
@@ -189,7 +189,7 @@ public function testRankings() {
 
     // Do the search and assert the results. The recent node should show up
     // first, then the commented node, then all the rest.
-    $this->nodeSearch->getPlugin()->setSearch('rocks', array(), array());
+    $this->nodeSearch->getPlugin()->setSearch('rocks', [], []);
     $set = $this->nodeSearch->getPlugin()->execute();
     $this->assertEqual($set[0]['node']->id(), $nodes['recent'][1]->id(), 'Search ranking for recent first worked.');
     $this->assertEqual($set[1]['node']->id(), $nodes['comments'][1]->id(), 'Search ranking for comments second worked.');
@@ -200,33 +200,33 @@ public function testRankings() {
    * Test rankings of HTML tags.
    */
   public function testHTMLRankings() {
-    $full_html_format = FilterFormat::create(array(
+    $full_html_format = FilterFormat::create([
       'format' => 'full_html',
       'name' => 'Full HTML',
-    ));
+    ]);
     $full_html_format->save();
 
     // Test HTML tags with different weights.
-    $sorted_tags = array('h1', 'h2', 'h3', 'h4', 'a', 'h5', 'h6', 'notag');
+    $sorted_tags = ['h1', 'h2', 'h3', 'h4', 'a', 'h5', 'h6', 'notag'];
     $shuffled_tags = $sorted_tags;
 
     // Shuffle tags to ensure HTML tags are ranked properly.
     shuffle($shuffled_tags);
-    $settings = array(
+    $settings = [
       'type' => 'page',
       'title' => 'Simple node',
-    );
-    $nodes = array();
+    ];
+    $nodes = [];
     foreach ($shuffled_tags as $tag) {
       switch ($tag) {
         case 'a':
-          $settings['body'] = array(array('value' => \Drupal::l('Drupal Rocks', new Url('<front>')), 'format' => 'full_html'));
+          $settings['body'] = [['value' => \Drupal::l('Drupal Rocks', new Url('<front>')), 'format' => 'full_html']];
           break;
         case 'notag':
-          $settings['body'] = array(array('value' => 'Drupal Rocks'));
+          $settings['body'] = [['value' => 'Drupal Rocks']];
           break;
         default:
-          $settings['body'] = array(array('value' => "<$tag>Drupal Rocks</$tag>", 'format' => 'full_html'));
+          $settings['body'] = [['value' => "<$tag>Drupal Rocks</$tag>", 'format' => 'full_html']];
           break;
       }
       $nodes[$tag] = $this->drupalCreateNode($settings);
@@ -236,7 +236,7 @@ public function testHTMLRankings() {
     $this->nodeSearch->getPlugin()->updateIndex();
     search_update_totals();
 
-    $this->nodeSearch->getPlugin()->setSearch('rocks', array(), array());
+    $this->nodeSearch->getPlugin()->setSearch('rocks', [], []);
     // Do the search and assert the results.
     $set = $this->nodeSearch->getPlugin()->execute();
 
@@ -252,16 +252,16 @@ public function testHTMLRankings() {
     }
 
     // Test tags with the same weight against the sorted tags.
-    $unsorted_tags = array('u', 'b', 'i', 'strong', 'em');
+    $unsorted_tags = ['u', 'b', 'i', 'strong', 'em'];
     foreach ($unsorted_tags as $tag) {
-      $settings['body'] = array(array('value' => "<$tag>Drupal Rocks</$tag>", 'format' => 'full_html'));
+      $settings['body'] = [['value' => "<$tag>Drupal Rocks</$tag>", 'format' => 'full_html']];
       $node = $this->drupalCreateNode($settings);
 
       // Update the search index.
       $this->nodeSearch->getPlugin()->updateIndex();
       search_update_totals();
 
-      $this->nodeSearch->getPlugin()->setSearch('rocks', array(), array());
+      $this->nodeSearch->getPlugin()->setSearch('rocks', [], []);
       // Do the search and assert the results.
       $set = $this->nodeSearch->getPlugin()->execute();
 
diff --git a/core/modules/search/src/Tests/SearchTestBase.php b/core/modules/search/src/Tests/SearchTestBase.php
index 59f6c456d695e18131e6c42c75f501378415cbc8..1c157b6d0d51e3198ebf2c9d18ea997760ddbd42 100644
--- a/core/modules/search/src/Tests/SearchTestBase.php
+++ b/core/modules/search/src/Tests/SearchTestBase.php
@@ -18,15 +18,15 @@ abstract class SearchTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'search', 'dblog');
+  public static $modules = ['node', 'search', 'dblog'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
   }
 
@@ -71,13 +71,13 @@ protected function submitGetForm($path, $edit, $submit, $form_html_id = NULL) {
       foreach ($forms as $form) {
         // Try to set the fields of this form as specified in $edit.
         $edit = $edit_save;
-        $post = array();
-        $upload = array();
+        $post = [];
+        $upload = [];
         $submit_matches = $this->handleForm($post, $edit, $upload, $submit, $form);
         if (!$edit && $submit_matches) {
           // Everything matched, so "submit" the form.
           $action = isset($form['action']) ? $this->getAbsoluteUrl((string) $form['action']) : NULL;
-          $this->drupalGet($action, array('query' => $post));
+          $this->drupalGet($action, ['query' => $post]);
           return;
         }
       }
@@ -85,10 +85,10 @@ protected function submitGetForm($path, $edit, $submit, $form_html_id = NULL) {
       // We have not found a form which contained all fields of $edit and
       // the submit button.
       foreach ($edit as $name => $value) {
-        $this->fail(SafeMarkup::format('Failed to set field @name to @value', array('@name' => $name, '@value' => $value)));
+        $this->fail(SafeMarkup::format('Failed to set field @name to @value', ['@name' => $name, '@value' => $value]));
       }
-      $this->assertTrue($submit_matches, format_string('Found the @submit button', array('@submit' => $submit)));
-      $this->fail(format_string('Found the requested form fields at @path', array('@path' => $path)));
+      $this->assertTrue($submit_matches, format_string('Found the @submit button', ['@submit' => $submit]));
+      $this->fail(format_string('Found the requested form fields at @path', ['@path' => $path]));
     }
   }
 
diff --git a/core/modules/search/tests/modules/search_embedded_form/src/Form/SearchEmbeddedForm.php b/core/modules/search/tests/modules/search_embedded_form/src/Form/SearchEmbeddedForm.php
index 29c047d05f16b38b7ea749976ec9cf6cf2faad97..64d9418fb5b8d1b743d06267bab145599f74b016 100644
--- a/core/modules/search/tests/modules/search_embedded_form/src/Form/SearchEmbeddedForm.php
+++ b/core/modules/search/tests/modules/search_embedded_form/src/Form/SearchEmbeddedForm.php
@@ -23,20 +23,20 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $count = \Drupal::state()->get('search_embedded_form.submit_count');
 
-    $form['name'] = array(
+    $form['name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Your name'),
       '#maxlength' => 255,
       '#default_value' => '',
       '#required' => TRUE,
-      '#description' => $this->t('Times form has been submitted: %count', array('%count' => $count)),
-    );
+      '#description' => $this->t('Times form has been submitted: %count', ['%count' => $count]),
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Send away'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/search/tests/modules/search_extra_type/src/Plugin/Search/SearchExtraTypeSearch.php b/core/modules/search/tests/modules/search_extra_type/src/Plugin/Search/SearchExtraTypeSearch.php
index d02fd81a3c860258b59f968897f38e8a3c005d9a..d18ff1c9254a3561c9f9addaa9d5271d07e49de5 100644
--- a/core/modules/search/tests/modules/search_extra_type/src/Plugin/Search/SearchExtraTypeSearch.php
+++ b/core/modules/search/tests/modules/search_extra_type/src/Plugin/Search/SearchExtraTypeSearch.php
@@ -50,18 +50,18 @@ public function isSearchExecutable() {
    *   A structured list of search results
    */
   public function execute() {
-    $results = array();
+    $results = [];
     if (!$this->isSearchExecutable()) {
       return $results;
     }
-    return array(
-      array(
+    return [
+      [
         'link' => Url::fromRoute('test_page_test.test_page')->toString(),
         'type' => 'Dummy result type',
         'title' => 'Dummy title',
         'snippet' => SafeMarkup::format("Dummy search snippet to display. Keywords: @keywords\n\nConditions: @search_parameters", ['@keywords' => $this->keywords, '@search_parameters' => print_r($this->searchParameters, TRUE)]),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -72,15 +72,15 @@ public function buildResults() {
     $output['prefix']['#markup'] = '<h2>Test page text is here</h2> <ol class="search-results">';
 
     foreach ($results as $entry) {
-      $output[] = array(
+      $output[] = [
         '#theme' => 'search_result',
         '#result' => $entry,
         '#plugin_id' => 'search_extra_type_search',
-      );
+      ];
     }
-    $pager = array(
+    $pager = [
       '#type' => 'pager',
-    );
+    ];
     $output['suffix']['#markup'] = '</ol>' . drupal_render($pager);
 
     return $output;
@@ -91,21 +91,21 @@ public function buildResults() {
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     // Output form for defining rank factor weights.
-    $form['extra_type_settings'] = array(
+    $form['extra_type_settings'] = [
       '#type' => 'fieldset',
       '#title' => t('Extra type settings'),
       '#tree' => TRUE,
-    );
+    ];
 
-    $form['extra_type_settings']['boost'] = array(
+    $form['extra_type_settings']['boost'] = [
       '#type' => 'select',
       '#title' => t('Boost method'),
-      '#options' => array(
+      '#options' => [
         'bi' => t('Bistromathic'),
         'ii' => t('Infinite Improbability'),
-      ),
+      ],
       '#default_value' => $this->configuration['boost'],
-    );
+    ];
     return $form;
   }
 
@@ -113,16 +113,16 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
    * {@inheritdoc}
    */
   public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
-    $this->configuration['boost'] = $form_state->getValue(array('extra_type_settings', 'boost'));
+    $this->configuration['boost'] = $form_state->getValue(['extra_type_settings', 'boost']);
   }
 
   /**
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'boost' => 'bi',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/search/tests/src/Functional/SearchCommentCountToggleTest.php b/core/modules/search/tests/src/Functional/SearchCommentCountToggleTest.php
index a6bf35ec690ef5251bf4aeba570fa7997ceff181..14ae5572e466cc72353e2243326f4f2c44dd074c 100644
--- a/core/modules/search/tests/src/Functional/SearchCommentCountToggleTest.php
+++ b/core/modules/search/tests/src/Functional/SearchCommentCountToggleTest.php
@@ -26,7 +26,7 @@ class SearchCommentCountToggleTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'comment');
+  public static $modules = ['node', 'comment'];
 
   /**
    * A user with permission to search and post comments.
@@ -46,7 +46,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create searching user.
-    $this->searchingUser = $this->drupalCreateUser(array('search content', 'access content', 'access comments', 'post comments', 'skip comment approval'));
+    $this->searchingUser = $this->drupalCreateUser(['search content', 'access content', 'access comments', 'post comments', 'skip comment approval']);
 
     // Log in with sufficient privileges.
     $this->drupalLogin($this->searchingUser);
@@ -54,13 +54,13 @@ protected function setUp() {
     // Add a comment field.
     $this->addDefaultCommentField('node', 'article');
     // Create initial nodes.
-    $node_params = array('type' => 'article', 'body' => array(array('value' => 'SearchCommentToggleTestCase')));
+    $node_params = ['type' => 'article', 'body' => [['value' => 'SearchCommentToggleTestCase']]];
 
     $this->searchableNodes['1 comment'] = $this->drupalCreateNode($node_params);
     $this->searchableNodes['0 comments'] = $this->drupalCreateNode($node_params);
 
     // Create a comment array
-    $edit_comment = array();
+    $edit_comment = [];
     $edit_comment['subject[0][value]'] = $this->randomMachineName();
     $edit_comment['comment_body[0][value]'] = $this->randomMachineName();
 
@@ -81,9 +81,9 @@ protected function setUp() {
    */
   function testSearchCommentCountToggle() {
     // Search for the nodes by string in the node body.
-    $edit = array(
+    $edit = [
       'keys' => "'SearchCommentToggleTestCase'",
-    );
+    ];
     $this->drupalGet('search/node');
 
     // Test comment count display for nodes with comment status set to Open
diff --git a/core/modules/search/tests/src/Functional/SearchExactTest.php b/core/modules/search/tests/src/Functional/SearchExactTest.php
index 6280364513b28a8aa3ffdacd33261a860dc49252..ca876ae2926dfe6bd806c408053dd82271748c14 100644
--- a/core/modules/search/tests/src/Functional/SearchExactTest.php
+++ b/core/modules/search/tests/src/Functional/SearchExactTest.php
@@ -13,25 +13,25 @@ class SearchExactTest extends SearchTestBase {
    */
   function testExactQuery() {
     // Log in with sufficient privileges.
-    $user = $this->drupalCreateUser(array('create page content', 'search content'));
+    $user = $this->drupalCreateUser(['create page content', 'search content']);
     $this->drupalLogin($user);
 
-    $settings = array(
+    $settings = [
       'type' => 'page',
       'title' => 'Simple Node',
-    );
+    ];
     // Create nodes with exact phrase.
     for ($i = 0; $i <= 17; $i++) {
-      $settings['body'] = array(array('value' => 'love pizza'));
+      $settings['body'] = [['value' => 'love pizza']];
       $this->drupalCreateNode($settings);
     }
     // Create nodes containing keywords.
     for ($i = 0; $i <= 17; $i++) {
-      $settings['body'] = array(array('value' => 'love cheesy pizza'));
+      $settings['body'] = [['value' => 'love cheesy pizza']];
       $this->drupalCreateNode($settings);
     }
     // Create another node and save it for later.
-    $settings['body'] = array(array('value' => 'Druplicon'));
+    $settings['body'] = [['value' => 'Druplicon']];
     $node = $this->drupalCreateNode($settings);
 
     // Update the search index.
@@ -42,7 +42,7 @@ function testExactQuery() {
     $this->refreshVariables();
 
     // Test that the correct number of pager links are found for keyword search.
-    $edit = array('keys' => 'love pizza');
+    $edit = ['keys' => 'love pizza'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertLinkByHref('page=1', 0, '2nd page link is found for keyword search.');
     $this->assertLinkByHref('page=2', 0, '3rd page link is found for keyword search.');
@@ -50,7 +50,7 @@ function testExactQuery() {
     $this->assertNoLinkByHref('page=4', '5th page link is not found for keyword search.');
 
     // Test that the correct number of pager links are found for exact phrase search.
-    $edit = array('keys' => '"love pizza"');
+    $edit = ['keys' => '"love pizza"'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertLinkByHref('page=1', 0, '2nd page link is found for exact phrase search.');
     $this->assertNoLinkByHref('page=2', '3rd page link is not found for exact phrase search.');
@@ -60,7 +60,7 @@ function testExactQuery() {
     $node_type_config->set('display_submitted', TRUE);
     $node_type_config->save();
 
-    $edit = array('keys' => 'Druplicon');
+    $edit = ['keys' => 'Druplicon'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText($user->getUsername(), 'Basic page node displays author name when post settings are on.');
     $this->assertText(format_date($node->getChangedTime(), 'short'), 'Basic page node displays post date when post settings are on.');
@@ -69,7 +69,7 @@ function testExactQuery() {
     // information is not displayed.
     $node_type_config->set('display_submitted', FALSE);
     $node_type_config->save();
-    $edit = array('keys' => 'Druplicon');
+    $edit = ['keys' => 'Druplicon'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertNoText($user->getUsername(), 'Basic page node does not display author name when post settings are off.');
     $this->assertNoText(format_date($node->getChangedTime(), 'short'), 'Basic page node does not display post date when post settings are off.');
diff --git a/core/modules/search/tests/src/Functional/SearchKeywordsConditionsTest.php b/core/modules/search/tests/src/Functional/SearchKeywordsConditionsTest.php
index a75fcb5ddbd05da7bff029f748d69236254d75fd..287596ab3e354063e94b892f135a316010b2bc6a 100644
--- a/core/modules/search/tests/src/Functional/SearchKeywordsConditionsTest.php
+++ b/core/modules/search/tests/src/Functional/SearchKeywordsConditionsTest.php
@@ -20,7 +20,7 @@ class SearchKeywordsConditionsTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('comment', 'search_extra_type', 'test_page_test');
+  public static $modules = ['comment', 'search_extra_type', 'test_page_test'];
 
   /**
    * A user with permission to search and post comments.
@@ -33,7 +33,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create searching user.
-    $this->searchingUser = $this->drupalCreateUser(array('search content', 'access content', 'access comments', 'skip comment approval'));
+    $this->searchingUser = $this->drupalCreateUser(['search content', 'access content', 'access comments', 'skip comment approval']);
     // Log in with sufficient privileges.
     $this->drupalLogin($this->searchingUser);
   }
@@ -47,16 +47,16 @@ function testSearchKeywordsConditions() {
     $this->assertNoText('Dummy search snippet to display');
     // With keys - get results.
     $keys = 'bike shed ' . $this->randomMachineName();
-    $this->drupalGet("search/dummy_path", array('query' => array('keys' => $keys)));
+    $this->drupalGet("search/dummy_path", ['query' => ['keys' => $keys]]);
     $this->assertText("Dummy search snippet to display. Keywords: {$keys}");
     $keys = 'blue drop ' . $this->randomMachineName();
-    $this->drupalGet("search/dummy_path", array('query' => array('keys' => $keys)));
+    $this->drupalGet("search/dummy_path", ['query' => ['keys' => $keys]]);
     $this->assertText("Dummy search snippet to display. Keywords: {$keys}");
     // Add some conditions and keys.
     $keys = 'moving drop ' . $this->randomMachineName();
-    $this->drupalGet("search/dummy_path", array('query' => array('keys' => 'bike', 'search_conditions' => $keys)));
+    $this->drupalGet("search/dummy_path", ['query' => ['keys' => 'bike', 'search_conditions' => $keys]]);
     $this->assertText("Dummy search snippet to display.");
-    $this->assertRaw(Html::escape(print_r(array('keys' => 'bike', 'search_conditions' => $keys), TRUE)));
+    $this->assertRaw(Html::escape(print_r(['keys' => 'bike', 'search_conditions' => $keys], TRUE)));
   }
 
 }
diff --git a/core/modules/search/tests/src/Functional/SearchMultilingualEntityTest.php b/core/modules/search/tests/src/Functional/SearchMultilingualEntityTest.php
index faaa93f6c136c2929cdd87423f35996b5382b33f..717ffc51957c13da3532c8ec0206b8c1a7b5d842 100644
--- a/core/modules/search/tests/src/Functional/SearchMultilingualEntityTest.php
+++ b/core/modules/search/tests/src/Functional/SearchMultilingualEntityTest.php
@@ -17,7 +17,7 @@ class SearchMultilingualEntityTest extends SearchTestBase {
    *
    * @var \Drupal\node\NodeInterface[]
    */
-  protected $searchableNodes = array();
+  protected $searchableNodes = [];
 
   /**
    * Node search plugin.
@@ -26,14 +26,14 @@ class SearchMultilingualEntityTest extends SearchTestBase {
    */
   protected $plugin;
 
-  public static $modules = array('language', 'locale', 'comment');
+  public static $modules = ['language', 'locale', 'comment'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create a user who can administer search, do searches, see the status
     // report, and administer cron. Log in.
-    $user = $this->drupalCreateUser(array('administer search', 'search content', 'use advanced search', 'access content', 'access site reports', 'administer site configuration'));
+    $user = $this->drupalCreateUser(['administer search', 'search content', 'use advanced search', 'access content', 'access site reports', 'administer site configuration']);
     $this->drupalLogin($user);
 
     // Set up the search plugin.
@@ -56,53 +56,53 @@ protected function setUp() {
 
     // Create a few page nodes with multilingual body values.
     $default_format = filter_default_format();
-    $nodes = array(
-      array(
+    $nodes = [
+      [
         'title' => 'First node en',
         'type' => 'page',
-        'body' => array(array('value' => $this->randomMachineName(32), 'format' => $default_format)),
+        'body' => [['value' => $this->randomMachineName(32), 'format' => $default_format]],
         'langcode' => 'en',
-      ),
-      array(
+      ],
+      [
         'title' => 'Second node this is the English title',
         'type' => 'page',
-        'body' => array(array('value' => $this->randomMachineName(32), 'format' => $default_format)),
+        'body' => [['value' => $this->randomMachineName(32), 'format' => $default_format]],
         'langcode' => 'en',
-      ),
-      array(
+      ],
+      [
         'title' => 'Third node en',
         'type' => 'page',
-        'body' => array(array('value' => $this->randomMachineName(32), 'format' => $default_format)),
+        'body' => [['value' => $this->randomMachineName(32), 'format' => $default_format]],
         'langcode' => 'en',
-      ),
+      ],
       // After the third node, we don't care what the settings are. But we
       // need to have at least 5 to make sure the throttling is working
       // correctly. So, let's make 8 total.
-      array(
-      ),
-      array(
-      ),
-      array(
-      ),
-      array(
-      ),
-      array(
-      ),
-    );
-    $this->searchableNodes = array();
+      [
+      ],
+      [
+      ],
+      [
+      ],
+      [
+      ],
+      [
+      ],
+    ];
+    $this->searchableNodes = [];
     foreach ($nodes as $setting) {
       $this->searchableNodes[] = $this->drupalCreateNode($setting);
     }
 
     // Add a single translation to the second node.
-    $translation = $this->searchableNodes[1]->addTranslation('hu', array('title' => 'Second node hu'));
+    $translation = $this->searchableNodes[1]->addTranslation('hu', ['title' => 'Second node hu']);
     $translation->body->value = $this->randomMachineName(32);
     $this->searchableNodes[1]->save();
 
     // Add two translations to the third node.
-    $translation = $this->searchableNodes[2]->addTranslation('hu', array('title' => 'Third node this is the Hungarian title'));
+    $translation = $this->searchableNodes[2]->addTranslation('hu', ['title' => 'Third node this is the Hungarian title']);
     $translation->body->value = $this->randomMachineName(32);
-    $translation = $this->searchableNodes[2]->addTranslation('sv', array('title' => 'Third node sv'));
+    $translation = $this->searchableNodes[2]->addTranslation('sv', ['title' => 'Third node sv']);
     $translation->body->value = $this->randomMachineName(32);
     $this->searchableNodes[2]->save();
 
@@ -132,7 +132,7 @@ function testMultilingualSearch() {
 
     // Now index the rest of the nodes.
     // Make sure index throttle is high enough, via the UI.
-    $this->drupalPostForm('admin/config/search/pages', array('cron_limit' => 20), t('Save configuration'));
+    $this->drupalPostForm('admin/config/search/pages', ['cron_limit' => 20], t('Save configuration'));
     $this->assertEqual(20, $this->config('search.settings')->get('index.cron_limit', 100), 'Config setting was saved correctly');
     // Get a new search plugin, to make sure it has this setting.
     $this->plugin = $this->container->get('plugin.manager.search')->createInstance('node_search');
@@ -143,8 +143,8 @@ function testMultilingualSearch() {
     $this->assertDatabaseCounts(8, 0, 'after updating fully');
 
     // Click the reindex button on the admin page, verify counts, and reindex.
-    $this->drupalPostForm('admin/config/search/pages', array(), t('Re-index site'));
-    $this->drupalPostForm(NULL, array(), t('Re-index site'));
+    $this->drupalPostForm('admin/config/search/pages', [], t('Re-index site'));
+    $this->drupalPostForm(NULL, [], t('Re-index site'));
     $this->assertIndexCounts(8, 8, 'after reindex');
     $this->assertDatabaseCounts(8, 0, 'after reindex');
     $this->plugin->updateIndex();
@@ -153,30 +153,30 @@ function testMultilingualSearch() {
     // Test search results.
 
     // This should find two results for the second and third node.
-    $this->plugin->setSearch('English OR Hungarian', array(), array());
+    $this->plugin->setSearch('English OR Hungarian', [], []);
     $search_result = $this->plugin->execute();
     $this->assertEqual(count($search_result), 2, 'Found two results.');
     // Nodes are saved directly after each other and have the same created time
     // so testing for the order is not possible.
-    $results = array($search_result[0]['title'], $search_result[1]['title']);
+    $results = [$search_result[0]['title'], $search_result[1]['title']];
     $this->assertTrue(in_array('Third node this is the Hungarian title', $results), 'The search finds the correct Hungarian title.');
     $this->assertTrue(in_array('Second node this is the English title', $results), 'The search finds the correct English title.');
 
     // Now filter for Hungarian results only.
-    $this->plugin->setSearch('English OR Hungarian', array('f' => array('language:hu')), array());
+    $this->plugin->setSearch('English OR Hungarian', ['f' => ['language:hu']], []);
     $search_result = $this->plugin->execute();
 
     $this->assertEqual(count($search_result), 1, 'The search found only one result');
     $this->assertEqual($search_result[0]['title'], 'Third node this is the Hungarian title', 'The search finds the correct Hungarian title.');
 
     // Test for search with common key word across multiple languages.
-    $this->plugin->setSearch('node', array(), array());
+    $this->plugin->setSearch('node', [], []);
     $search_result = $this->plugin->execute();
 
     $this->assertEqual(count($search_result), 6, 'The search found total six results');
 
     // Test with language filters and common key word.
-    $this->plugin->setSearch('node', array('f' => array('language:hu')), array());
+    $this->plugin->setSearch('node', ['f' => ['language:hu']], []);
     $search_result = $this->plugin->execute();
 
     $this->assertEqual(count($search_result), 2, 'The search found 2 results');
@@ -207,14 +207,14 @@ function testMultilingualSearch() {
     $current = REQUEST_TIME;
     $old = $current - 10;
     db_update('search_dataset')
-      ->fields(array('reindex' => $old))
+      ->fields(['reindex' => $old])
       ->condition('reindex', $current, '>=')
       ->execute();
 
     // Save the node again. Verify that the request time on it is not updated.
     $this->searchableNodes[1]->save();
     $result = db_select('search_dataset', 'd')
-      ->fields('d', array('reindex'))
+      ->fields('d', ['reindex'])
       ->condition('type', 'node_search')
       ->condition('sid', $this->searchableNodes[1]->id())
       ->execute()
@@ -302,7 +302,7 @@ protected function assertIndexCounts($remaining, $total, $message) {
   protected function assertDatabaseCounts($count_node, $count_foo, $message) {
     // Count number of distinct nodes by ID.
     $results = db_select('search_dataset', 'i')
-      ->fields('i', array('sid'))
+      ->fields('i', ['sid'])
       ->condition('type', 'node_search')
       ->groupBy('sid')
       ->execute()
@@ -311,7 +311,7 @@ protected function assertDatabaseCounts($count_node, $count_foo, $message) {
 
     // Count number of "foo" records.
     $results = db_select('search_dataset', 'i')
-      ->fields('i', array('sid'))
+      ->fields('i', ['sid'])
       ->condition('type', 'foo')
       ->execute()
       ->fetchCol();
diff --git a/core/modules/search/tests/src/Functional/SearchNodeDiacriticsTest.php b/core/modules/search/tests/src/Functional/SearchNodeDiacriticsTest.php
index 27baa4b3433d272880de1a0c2d32122fa67e147b..32aa102de697fdc66369fedcb50461ef8e011d8a 100644
--- a/core/modules/search/tests/src/Functional/SearchNodeDiacriticsTest.php
+++ b/core/modules/search/tests/src/Functional/SearchNodeDiacriticsTest.php
@@ -21,7 +21,7 @@ protected function setUp() {
     node_access_rebuild();
 
     // Create a test user and log in.
-    $this->testUser = $this->drupalCreateUser(array('access content', 'search content', 'use advanced search', 'access user profiles'));
+    $this->testUser = $this->drupalCreateUser(['access content', 'search content', 'use advanced search', 'access user profiles']);
     $this->drupalLogin($this->testUser);
   }
 
@@ -31,7 +31,7 @@ protected function setUp() {
   function testPhraseSearchPunctuation() {
     $body_text = 'The Enricþment Center is cómmīŦŧęđ to the well BɆĬŇĜ of æll påŔťıçȉpǎǹţș. ';
     $body_text .= 'Also meklēt (see #731298)';
-    $this->drupalCreateNode(array('body' => array(array('value' => $body_text))));
+    $this->drupalCreateNode(['body' => [['value' => $body_text]]]);
 
     // Update the search index.
     $this->container->get('plugin.manager.search')->createInstance('node_search')->updateIndex();
@@ -40,39 +40,39 @@ function testPhraseSearchPunctuation() {
     // Refresh variables after the treatment.
     $this->refreshVariables();
 
-    $edit = array('keys' => 'meklet');
+    $edit = ['keys' => 'meklet'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertRaw('<strong>meklēt</strong>');
 
-    $edit = array('keys' => 'meklēt');
+    $edit = ['keys' => 'meklēt'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertRaw('<strong>meklēt</strong>');
 
-    $edit = array('keys' => 'cómmīŦŧęđ BɆĬŇĜ påŔťıçȉpǎǹţș');
+    $edit = ['keys' => 'cómmīŦŧęđ BɆĬŇĜ påŔťıçȉpǎǹţș'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertRaw('<strong>cómmīŦŧęđ</strong>');
     $this->assertRaw('<strong>BɆĬŇĜ</strong>');
     $this->assertRaw('<strong>påŔťıçȉpǎǹţș</strong>');
 
-    $edit = array('keys' => 'committed being participants');
+    $edit = ['keys' => 'committed being participants'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertRaw('<strong>cómmīŦŧęđ</strong>');
     $this->assertRaw('<strong>BɆĬŇĜ</strong>');
     $this->assertRaw('<strong>påŔťıçȉpǎǹţș</strong>');
 
-    $edit = array('keys' => 'Enricþment');
+    $edit = ['keys' => 'Enricþment'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertRaw('<strong>Enricþment</strong>');
 
-    $edit = array('keys' => 'Enritchment');
+    $edit = ['keys' => 'Enritchment'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertNoRaw('<strong>Enricþment</strong>');
 
-    $edit = array('keys' => 'æll');
+    $edit = ['keys' => 'æll'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertRaw('<strong>æll</strong>');
 
-    $edit = array('keys' => 'all');
+    $edit = ['keys' => 'all'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertNoRaw('<strong>æll</strong>');
   }
diff --git a/core/modules/search/tests/src/Functional/SearchNodePunctuationTest.php b/core/modules/search/tests/src/Functional/SearchNodePunctuationTest.php
index 0d0a129807ca554b3fdb96ee6679b63d8299ab77..8c8958cea85984f759e916e90931d18bcbea9b67 100644
--- a/core/modules/search/tests/src/Functional/SearchNodePunctuationTest.php
+++ b/core/modules/search/tests/src/Functional/SearchNodePunctuationTest.php
@@ -21,7 +21,7 @@ protected function setUp() {
     node_access_rebuild();
 
     // Create a test user and log in.
-    $this->testUser = $this->drupalCreateUser(array('access content', 'search content', 'use advanced search', 'access user profiles'));
+    $this->testUser = $this->drupalCreateUser(['access content', 'search content', 'use advanced search', 'access user profiles']);
     $this->drupalLogin($this->testUser);
   }
 
@@ -29,8 +29,8 @@ protected function setUp() {
    * Tests that search works with punctuation and HTML entities.
    */
   function testPhraseSearchPunctuation() {
-    $node = $this->drupalCreateNode(array('body' => array(array('value' => "The bunny's ears were fluffy."))));
-    $node2 = $this->drupalCreateNode(array('body' => array(array('value' => 'Dignissim Aliquam &amp; Quieligo meus natu quae quia te. Damnum&copy; erat&mdash; neo pneum. Facilisi feugiat ibidem ratis.'))));
+    $node = $this->drupalCreateNode(['body' => [['value' => "The bunny's ears were fluffy."]]]);
+    $node2 = $this->drupalCreateNode(['body' => [['value' => 'Dignissim Aliquam &amp; Quieligo meus natu quae quia te. Damnum&copy; erat&mdash; neo pneum. Facilisi feugiat ibidem ratis.']]]);
 
     // Update the search index.
     $this->container->get('plugin.manager.search')->createInstance('node_search')->updateIndex();
@@ -40,7 +40,7 @@ function testPhraseSearchPunctuation() {
     $this->refreshVariables();
 
     // Submit a phrase wrapped in double quotes to include the punctuation.
-    $edit = array('keys' => '"bunny\'s"');
+    $edit = ['keys' => '"bunny\'s"'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertText($node->label());
 
@@ -49,12 +49,12 @@ function testPhraseSearchPunctuation() {
     $this->assertLink($username);
 
     // Search for "&" and verify entities are not broken up in the output.
-    $edit = array('keys' => '&');
+    $edit = ['keys' => '&'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertNoRaw('<strong>&</strong>amp;');
     $this->assertText('You must include at least one keyword');
 
-    $edit = array('keys' => '&amp;');
+    $edit = ['keys' => '&amp;'];
     $this->drupalPostForm('search/node', $edit, t('Search'));
     $this->assertNoRaw('<strong>&</strong>amp;');
     $this->assertText('You must include at least one keyword');
diff --git a/core/modules/search/tests/src/Functional/SearchPageOverrideTest.php b/core/modules/search/tests/src/Functional/SearchPageOverrideTest.php
index 88edab177bd7ea7123adcc938e022c6256f90582..fe6e9805e70a40c4ed37597bc146ae3cc21e35b7 100644
--- a/core/modules/search/tests/src/Functional/SearchPageOverrideTest.php
+++ b/core/modules/search/tests/src/Functional/SearchPageOverrideTest.php
@@ -17,7 +17,7 @@ class SearchPageOverrideTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('search_extra_type');
+  public static $modules = ['search_extra_type'];
 
   /**
    * A user with permission to administer search.
@@ -30,13 +30,13 @@ protected function setUp() {
     parent::setUp();
 
     // Log in as a user that can create and search content.
-    $this->searchUser = $this->drupalCreateUser(array('search content', 'administer search'));
+    $this->searchUser = $this->drupalCreateUser(['search content', 'administer search']);
     $this->drupalLogin($this->searchUser);
   }
 
   function testSearchPageHook() {
     $keys = 'bike shed ' . $this->randomMachineName();
-    $this->drupalGet("search/dummy_path", array('query' => array('keys' => $keys)));
+    $this->drupalGet("search/dummy_path", ['query' => ['keys' => $keys]]);
     $this->assertText('Dummy search snippet', 'Dummy search snippet is shown');
     $this->assertText('Test page text is here', 'Page override is working');
   }
diff --git a/core/modules/search/tests/src/Functional/SearchSetLocaleTest.php b/core/modules/search/tests/src/Functional/SearchSetLocaleTest.php
index 4291598c9485426afc4fc3d69a15de6b1a1d7b62..f6923f4320b011f72433b51eee184305de92fab0 100644
--- a/core/modules/search/tests/src/Functional/SearchSetLocaleTest.php
+++ b/core/modules/search/tests/src/Functional/SearchSetLocaleTest.php
@@ -14,7 +14,7 @@ class SearchSetLocaleTest extends SearchTestBase {
    *
    * @var array
    */
-  public static $modules = array('comment');
+  public static $modules = ['comment'];
 
   /**
    * A node search plugin instance.
@@ -29,7 +29,7 @@ protected function setUp() {
     // Create a plugin instance.
     $this->nodeSearchPlugin = $this->container->get('plugin.manager.search')->createInstance('node_search');
     // Create a node with a very simple body.
-    $this->drupalCreateNode(array('body' => array(array('value' => 'tapir'))));
+    $this->drupalCreateNode(['body' => [['value' => 'tapir']]]);
     // Update the search index.
     $this->nodeSearchPlugin->updateIndex();
     search_update_totals();
@@ -41,7 +41,7 @@ protected function setUp() {
   public function testSearchWithNumericLocale() {
     // French decimal point is comma.
     setlocale(LC_NUMERIC, 'fr_FR');
-    $this->nodeSearchPlugin->setSearch('tapir', array(), array());
+    $this->nodeSearchPlugin->setSearch('tapir', [], []);
     // The call to execute will throw an exception if a float in the wrong
     // format is passed in the query to the database, so an assertion is not
     // necessary here.
diff --git a/core/modules/search/tests/src/Functional/SearchSimplifyTest.php b/core/modules/search/tests/src/Functional/SearchSimplifyTest.php
index 6e7bb849478791648770fea54aded53e226bc9ae..a70b65e4d3313ba583d4926bd50d618c482abe97 100644
--- a/core/modules/search/tests/src/Functional/SearchSimplifyTest.php
+++ b/core/modules/search/tests/src/Functional/SearchSimplifyTest.php
@@ -22,7 +22,7 @@ function testSearchSimplifyUnicode() {
     // verify that simplification doesn't lose any characters.
     $input = file_get_contents(\Drupal::root() . '/core/modules/search/tests/UnicodeTest.txt');
     $basestrings = explode(chr(10), $input);
-    $strings = array();
+    $strings = [];
     foreach ($basestrings as $key => $string) {
       if ($key % 2) {
         // Even line - should simplify down to a space.
@@ -65,12 +65,12 @@ function testSearchSimplifyUnicode() {
    * Tests that search_simplify() does the right thing with punctuation.
    */
   function testSearchSimplifyPunctuation() {
-    $cases = array(
-      array('20.03/94-28,876', '20039428876', 'Punctuation removed from numbers'),
-      array('great...drupal--module', 'great drupal module', 'Multiple dot and dashes are word boundaries'),
-      array('very_great-drupal.module', 'verygreatdrupalmodule', 'Single dot, dash, underscore are removed'),
-      array('regular,punctuation;word', 'regular punctuation word', 'Punctuation is a word boundary'),
-    );
+    $cases = [
+      ['20.03/94-28,876', '20039428876', 'Punctuation removed from numbers'],
+      ['great...drupal--module', 'great drupal module', 'Multiple dot and dashes are word boundaries'],
+      ['very_great-drupal.module', 'verygreatdrupalmodule', 'Single dot, dash, underscore are removed'],
+      ['regular,punctuation;word', 'regular punctuation word', 'Punctuation is a word boundary'],
+    ];
 
     foreach ($cases as $case) {
       $out = trim(search_simplify($case[0]));
diff --git a/core/modules/search/tests/src/Functional/SearchTestBase.php b/core/modules/search/tests/src/Functional/SearchTestBase.php
index 93e0ee26eb6fefbc9762f0d1e0e092984809665e..3739b570fa177b5d3c8107a9f67a9e8e295e23fe 100644
--- a/core/modules/search/tests/src/Functional/SearchTestBase.php
+++ b/core/modules/search/tests/src/Functional/SearchTestBase.php
@@ -15,15 +15,15 @@ abstract class SearchTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'search', 'dblog');
+  public static $modules = ['node', 'search', 'dblog'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
   }
 
@@ -68,13 +68,13 @@ protected function submitGetForm($path, $edit, $submit, $form_html_id = NULL) {
       foreach ($forms as $form) {
         // Try to set the fields of this form as specified in $edit.
         $edit = $edit_save;
-        $post = array();
-        $upload = array();
+        $post = [];
+        $upload = [];
         $submit_matches = $this->handleForm($post, $edit, $upload, $submit, $form);
         if (!$edit && $submit_matches) {
           // Everything matched, so "submit" the form.
           $action = isset($form['action']) ? $this->getAbsoluteUrl((string) $form['action']) : NULL;
-          $this->drupalGet($action, array('query' => $post));
+          $this->drupalGet($action, ['query' => $post]);
           return;
         }
       }
@@ -82,10 +82,10 @@ protected function submitGetForm($path, $edit, $submit, $form_html_id = NULL) {
       // We have not found a form which contained all fields of $edit and
       // the submit button.
       foreach ($edit as $name => $value) {
-        $this->fail(SafeMarkup::format('Failed to set field @name to @value', array('@name' => $name, '@value' => $value)));
+        $this->fail(SafeMarkup::format('Failed to set field @name to @value', ['@name' => $name, '@value' => $value]));
       }
-      $this->assertTrue($submit_matches, format_string('Found the @submit button', array('@submit' => $submit)));
-      $this->fail(format_string('Found the requested form fields at @path', array('@path' => $path)));
+      $this->assertTrue($submit_matches, format_string('Found the @submit button', ['@submit' => $submit]));
+      $this->fail(format_string('Found the requested form fields at @path', ['@path' => $path]));
     }
   }
 
diff --git a/core/modules/search/tests/src/Functional/SearchTokenizerTest.php b/core/modules/search/tests/src/Functional/SearchTokenizerTest.php
index e25bfc4028f39dd991d01e0455f602f4d1f0264e..03667bc77b43e400a441b9faa66ba4fb6919c057 100644
--- a/core/modules/search/tests/src/Functional/SearchTokenizerTest.php
+++ b/core/modules/search/tests/src/Functional/SearchTokenizerTest.php
@@ -31,7 +31,7 @@ function testTokenizer() {
     // the Unicode tables.
 
     // Beginnings of the character ranges.
-    $starts = array(
+    $starts = [
       'CJK unified' => 0x4e00,
       'CJK Ext A' => 0x3400,
       'CJK Compat' => 0xf900,
@@ -52,10 +52,10 @@ function testTokenizer() {
       'Bomofo Ext' => 0x31a0,
       'Lisu' => 0xa4d0,
       'Yi' => 0xa000,
-    );
+    ];
 
     // Ends of the character ranges.
-    $ends = array(
+    $ends = [
       'CJK unified' => 0x9fcf,
       'CJK Ext A' => 0x4dbf,
       'CJK Compat' => 0xfaff,
@@ -76,11 +76,11 @@ function testTokenizer() {
       'Bomofo Ext' => 0x31b7,
       'Lisu' => 0xa4fd,
       'Yi' => 0xa48f,
-    );
+    ];
 
     // Generate characters consisting of starts, midpoints, and ends.
-    $chars = array();
-    $charcodes = array();
+    $chars = [];
+    $charcodes = [];
     foreach ($starts as $key => $value) {
       $charcodes[] = $starts[$key];
       $chars[] = $this->code2utf($starts[$key]);
diff --git a/core/modules/search/tests/src/Kernel/Migrate/d6/MigrateSearchPageTest.php b/core/modules/search/tests/src/Kernel/Migrate/d6/MigrateSearchPageTest.php
index bcbc40e0dc776bc2a0c13f7f5da2014799f5e20c..a70114a6a92586061b3a731df648a07bbb6bcc94 100644
--- a/core/modules/search/tests/src/Kernel/Migrate/d6/MigrateSearchPageTest.php
+++ b/core/modules/search/tests/src/Kernel/Migrate/d6/MigrateSearchPageTest.php
@@ -35,20 +35,20 @@ public function testSearchPage() {
     $search_page = SearchPage::load($id);
     $this->assertIdentical($id, $search_page->id());
     $configuration = $search_page->getPlugin()->getConfiguration();
-    $this->assertIdentical($configuration['rankings'], array(
+    $this->assertIdentical($configuration['rankings'], [
       'comments' => 5,
       'promote' => 0,
       'recent' => 0,
       'relevance' => 2,
       'sticky' => 8,
       'views' => 1,
-    ));
+    ]);
     $this->assertIdentical('node', $search_page->getPath());
 
     // Test that we can re-import using the EntitySearchPage destination.
     Database::getConnection('default', 'migrate')
       ->update('variable')
-      ->fields(array('value' => serialize(4)))
+      ->fields(['value' => serialize(4)])
       ->condition('name', 'node_rank_comments')
       ->execute();
 
diff --git a/core/modules/search/tests/src/Kernel/Migrate/d7/MigrateSearchPageTest.php b/core/modules/search/tests/src/Kernel/Migrate/d7/MigrateSearchPageTest.php
index d7dae3e854253c2f8714b71156b5595feacf1f13..86d3b2200921d8efec9895d8470d40c6540196a1 100644
--- a/core/modules/search/tests/src/Kernel/Migrate/d7/MigrateSearchPageTest.php
+++ b/core/modules/search/tests/src/Kernel/Migrate/d7/MigrateSearchPageTest.php
@@ -18,7 +18,7 @@ class MigrateSearchPageTest extends MigrateDrupal7TestBase {
    *
    * {@inheritdoc}
    */
-  public static $modules = array('node', 'search');
+  public static $modules = ['node', 'search'];
 
   /**
    * {@inheritdoc}
@@ -37,20 +37,20 @@ public function testSearchPage() {
     $search_page = SearchPage::load($id);
     $this->assertIdentical($id, $search_page->id());
     $configuration = $search_page->getPlugin()->getConfiguration();
-    $expected_rankings = array(
+    $expected_rankings = [
       'comments' => 0,
       'promote' => 0,
       'relevance' => 2,
       'sticky' => 0,
       'views' => 0,
-    );
+    ];
     $this->assertIdentical($expected_rankings, $configuration['rankings']);
     $this->assertIdentical('node', $search_page->getPath());
 
     // Test that we can re-import using the EntitySearchPage destination.
     Database::getConnection('default', 'migrate')
       ->update('variable')
-      ->fields(array('value' => serialize(4)))
+      ->fields(['value' => serialize(4)])
       ->condition('name', 'node_rank_comments')
       ->execute();
 
diff --git a/core/modules/search/tests/src/Kernel/SearchExcerptTest.php b/core/modules/search/tests/src/Kernel/SearchExcerptTest.php
index 85c09174aaab013003248deac1cbe79285655e94..02844b01114bdbf553772c5f7bb82d21fc234c04 100644
--- a/core/modules/search/tests/src/Kernel/SearchExcerptTest.php
+++ b/core/modules/search/tests/src/Kernel/SearchExcerptTest.php
@@ -16,7 +16,7 @@ class SearchExcerptTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('search', 'search_langcode_test');
+  public static $modules = ['search', 'search_langcode_test'];
 
   /**
    * Tests search_excerpt() with several simulated search keywords.
diff --git a/core/modules/search/tests/src/Kernel/SearchMatchTest.php b/core/modules/search/tests/src/Kernel/SearchMatchTest.php
index 0a17f7173e6237df7313199c8c93351068fc632a..13c926765e888205fd2913f0bf24be39ec3e6c7f 100644
--- a/core/modules/search/tests/src/Kernel/SearchMatchTest.php
+++ b/core/modules/search/tests/src/Kernel/SearchMatchTest.php
@@ -55,11 +55,11 @@ function _setup() {
       search_index(static::SEARCH_TYPE_2, $i + 7, LanguageInterface::LANGCODE_NOT_SPECIFIED, $this->getText2($i));
     }
     // No getText builder function for Japanese text; just a simple array.
-    foreach (array(
+    foreach ([
       13 => '以呂波耳・ほへとち。リヌルヲ。',
       14 => 'ドルーパルが大好きよ！',
       15 => 'コーヒーとケーキ',
-    ) as $i => $jpn) {
+    ] as $i => $jpn) {
       search_index(static::SEARCH_TYPE_JPN, $i, LanguageInterface::LANGCODE_NOT_SPECIFIED, $jpn);
     }
     search_update_totals();
@@ -108,106 +108,106 @@ function _testQueries() {
     // is good, and
     //   dolore OR ut = (dolore) OR (ut)
     // is bad. This is a design limitation to avoid full table scans.
-    $queries = array(
+    $queries = [
       // Simple AND queries.
-      'ipsum' => array(1),
-      'enim' => array(4, 5, 6),
-      'xxxxx' => array(),
-      'enim minim' => array(5, 6),
-      'enim xxxxx' => array(),
-      'dolore eu' => array(7),
-      'dolore xx' => array(),
-      'ut minim' => array(5),
-      'xx minim' => array(),
-      'enim veniam am minim ut' => array(5),
+      'ipsum' => [1],
+      'enim' => [4, 5, 6],
+      'xxxxx' => [],
+      'enim minim' => [5, 6],
+      'enim xxxxx' => [],
+      'dolore eu' => [7],
+      'dolore xx' => [],
+      'ut minim' => [5],
+      'xx minim' => [],
+      'enim veniam am minim ut' => [5],
       // Simple OR and AND/OR queries.
-      'dolore OR ipsum' => array(1, 2, 7),
-      'dolore OR xxxxx' => array(2, 7),
-      'dolore OR ipsum OR enim' => array(1, 2, 4, 5, 6, 7),
-      'ipsum OR dolore sit OR cillum' => array(2, 7),
-      'minim dolore OR ipsum' => array(7),
-      'dolore OR ipsum veniam' => array(7),
-      'minim dolore OR ipsum OR enim' => array(5, 6, 7),
-      'dolore xx OR yy' => array(),
-      'xxxxx dolore OR ipsum' => array(),
+      'dolore OR ipsum' => [1, 2, 7],
+      'dolore OR xxxxx' => [2, 7],
+      'dolore OR ipsum OR enim' => [1, 2, 4, 5, 6, 7],
+      'ipsum OR dolore sit OR cillum' => [2, 7],
+      'minim dolore OR ipsum' => [7],
+      'dolore OR ipsum veniam' => [7],
+      'minim dolore OR ipsum OR enim' => [5, 6, 7],
+      'dolore xx OR yy' => [],
+      'xxxxx dolore OR ipsum' => [],
       // Sequence of OR queries.
-      'minim' => array(5, 6, 7),
-      'minim OR xxxx' => array(5, 6, 7),
-      'minim OR xxxx OR minim' => array(5, 6, 7),
-      'minim OR xxxx minim' => array(5, 6, 7),
-      'minim OR xxxx minim OR yyyy' => array(5, 6, 7),
-      'minim OR xxxx minim OR cillum' => array(6, 7, 5),
-      'minim OR xxxx minim OR xxxx' => array(5, 6, 7),
+      'minim' => [5, 6, 7],
+      'minim OR xxxx' => [5, 6, 7],
+      'minim OR xxxx OR minim' => [5, 6, 7],
+      'minim OR xxxx minim' => [5, 6, 7],
+      'minim OR xxxx minim OR yyyy' => [5, 6, 7],
+      'minim OR xxxx minim OR cillum' => [6, 7, 5],
+      'minim OR xxxx minim OR xxxx' => [5, 6, 7],
       // Negative queries.
-      'dolore -sit' => array(7),
-      'dolore -eu' => array(2),
-      'dolore -xxxxx' => array(2, 7),
-      'dolore -xx' => array(2, 7),
+      'dolore -sit' => [7],
+      'dolore -eu' => [2],
+      'dolore -xxxxx' => [2, 7],
+      'dolore -xx' => [2, 7],
       // Phrase queries.
-      '"dolore sit"' => array(2),
-      '"sit dolore"' => array(),
-      '"am minim veniam es"' => array(6, 7),
-      '"minim am veniam es"' => array(),
+      '"dolore sit"' => [2],
+      '"sit dolore"' => [],
+      '"am minim veniam es"' => [6, 7],
+      '"minim am veniam es"' => [],
       // Mixed queries.
-      '"am minim veniam es" OR dolore' => array(2, 6, 7),
-      '"minim am veniam es" OR "dolore sit"' => array(2),
-      '"minim am veniam es" OR "sit dolore"' => array(),
-      '"am minim veniam es" -eu' => array(6),
-      '"am minim veniam" -"cillum dolore"' => array(5, 6),
-      '"am minim veniam" -"dolore cillum"' => array(5, 6, 7),
-      'xxxxx "minim am veniam es" OR dolore' => array(),
-      'xx "minim am veniam es" OR dolore' => array()
-    );
+      '"am minim veniam es" OR dolore' => [2, 6, 7],
+      '"minim am veniam es" OR "dolore sit"' => [2],
+      '"minim am veniam es" OR "sit dolore"' => [],
+      '"am minim veniam es" -eu' => [6],
+      '"am minim veniam" -"cillum dolore"' => [5, 6],
+      '"am minim veniam" -"dolore cillum"' => [5, 6, 7],
+      'xxxxx "minim am veniam es" OR dolore' => [],
+      'xx "minim am veniam es" OR dolore' => []
+    ];
     foreach ($queries as $query => $results) {
       $result = db_select('search_index', 'i')
         ->extend('Drupal\search\SearchQuery')
         ->searchExpression($query, static::SEARCH_TYPE)
         ->execute();
 
-      $set = $result ? $result->fetchAll() : array();
+      $set = $result ? $result->fetchAll() : [];
       $this->_testQueryMatching($query, $set, $results);
       $this->_testQueryScores($query, $set, $results);
     }
 
     // These queries are run against the second index type, SEARCH_TYPE_2.
-    $queries = array(
+    $queries = [
       // Simple AND queries.
-      'ipsum' => array(),
-      'enim' => array(),
-      'enim minim' => array(),
-      'dear' => array(8),
-      'germany' => array(11, 12),
-    );
+      'ipsum' => [],
+      'enim' => [],
+      'enim minim' => [],
+      'dear' => [8],
+      'germany' => [11, 12],
+    ];
     foreach ($queries as $query => $results) {
       $result = db_select('search_index', 'i')
         ->extend('Drupal\search\SearchQuery')
         ->searchExpression($query, static::SEARCH_TYPE_2)
         ->execute();
 
-      $set = $result ? $result->fetchAll() : array();
+      $set = $result ? $result->fetchAll() : [];
       $this->_testQueryMatching($query, $set, $results);
       $this->_testQueryScores($query, $set, $results);
     }
 
     // These queries are run against the third index type, SEARCH_TYPE_JPN.
-    $queries = array(
+    $queries = [
       // Simple AND queries.
-      '呂波耳' => array(13),
-      '以呂波耳' => array(13),
-      'ほへと　ヌルヲ' => array(13),
-      'とちリ' => array(),
-      'ドルーパル' => array(14),
-      'パルが大' => array(14),
-      'コーヒー' => array(15),
-      'ヒーキ' => array(),
-    );
+      '呂波耳' => [13],
+      '以呂波耳' => [13],
+      'ほへと　ヌルヲ' => [13],
+      'とちリ' => [],
+      'ドルーパル' => [14],
+      'パルが大' => [14],
+      'コーヒー' => [15],
+      'ヒーキ' => [],
+    ];
     foreach ($queries as $query => $results) {
       $result = db_select('search_index', 'i')
         ->extend('Drupal\search\SearchQuery')
         ->searchExpression($query, static::SEARCH_TYPE_JPN)
         ->execute();
 
-      $set = $result ? $result->fetchAll() : array();
+      $set = $result ? $result->fetchAll() : [];
       $this->_testQueryMatching($query, $set, $results);
       $this->_testQueryScores($query, $set, $results);
     }
@@ -220,7 +220,7 @@ function _testQueries() {
    */
   function _testQueryMatching($query, $set, $results) {
     // Get result IDs.
-    $found = array();
+    $found = [];
     foreach ($set as $item) {
       $found[] = $item->sid;
     }
@@ -238,7 +238,7 @@ function _testQueryMatching($query, $set, $results) {
    */
   function _testQueryScores($query, $set, $results) {
     // Get result scores.
-    $scores = array();
+    $scores = [];
     foreach ($set as $item) {
       $scores[] = $item->calculated_score;
     }
diff --git a/core/modules/search/tests/src/Unit/SearchPageRepositoryTest.php b/core/modules/search/tests/src/Unit/SearchPageRepositoryTest.php
index d634207ba02ade3aa60cb6672c902314378b165c..69dffd87cc84e26a2ef6936fb6e896d7c8ac00b3 100644
--- a/core/modules/search/tests/src/Unit/SearchPageRepositoryTest.php
+++ b/core/modules/search/tests/src/Unit/SearchPageRepositoryTest.php
@@ -75,14 +75,14 @@ public function testGetActiveSearchPages() {
       ->will($this->returnValue($this->query));
     $this->query->expects($this->once())
       ->method('execute')
-      ->will($this->returnValue(array('test' => 'test', 'other_test' => 'other_test')));
+      ->will($this->returnValue(['test' => 'test', 'other_test' => 'other_test']));
 
-    $entities = array();
+    $entities = [];
     $entities['test'] = $this->getMock('Drupal\search\SearchPageInterface');
     $entities['other_test'] = $this->getMock('Drupal\search\SearchPageInterface');
     $this->storage->expects($this->once())
       ->method('loadMultiple')
-      ->with(array('test' => 'test', 'other_test' => 'other_test'))
+      ->with(['test' => 'test', 'other_test' => 'other_test'])
       ->will($this->returnValue($entities));
 
     $result = $this->searchPageRepository->getActiveSearchPages();
@@ -103,7 +103,7 @@ public function testIsSearchActive() {
       ->will($this->returnValue($this->query));
     $this->query->expects($this->once())
       ->method('execute')
-      ->will($this->returnValue(array('test' => 'test')));
+      ->will($this->returnValue(['test' => 'test']));
 
     $this->assertSame(TRUE, $this->searchPageRepository->isSearchActive());
   }
@@ -118,9 +118,9 @@ public function testGetIndexableSearchPages() {
       ->will($this->returnValue($this->query));
     $this->query->expects($this->once())
       ->method('execute')
-      ->will($this->returnValue(array('test' => 'test', 'other_test' => 'other_test')));
+      ->will($this->returnValue(['test' => 'test', 'other_test' => 'other_test']));
 
-    $entities = array();
+    $entities = [];
     $entities['test'] = $this->getMock('Drupal\search\SearchPageInterface');
     $entities['test']->expects($this->once())
       ->method('isIndexable')
@@ -131,7 +131,7 @@ public function testGetIndexableSearchPages() {
       ->will($this->returnValue(FALSE));
     $this->storage->expects($this->once())
       ->method('loadMultiple')
-      ->with(array('test' => 'test', 'other_test' => 'other_test'))
+      ->with(['test' => 'test', 'other_test' => 'other_test'])
       ->will($this->returnValue($entities));
 
     $result = $this->searchPageRepository->getIndexableSearchPages();
@@ -167,7 +167,7 @@ public function testGetDefaultSearchPageWithActiveDefault() {
       ->will($this->returnValue($this->query));
     $this->query->expects($this->once())
       ->method('execute')
-      ->will($this->returnValue(array('test' => 'test', 'other_test' => 'other_test')));
+      ->will($this->returnValue(['test' => 'test', 'other_test' => 'other_test']));
 
     $config = $this->getMockBuilder('Drupal\Core\Config\Config')
       ->disableOriginalConstructor()
@@ -194,7 +194,7 @@ public function testGetDefaultSearchPageWithInactiveDefault() {
       ->will($this->returnValue($this->query));
     $this->query->expects($this->once())
       ->method('execute')
-      ->will($this->returnValue(array('test' => 'test')));
+      ->will($this->returnValue(['test' => 'test']));
 
     $config = $this->getMockBuilder('Drupal\Core\Config\Config')
       ->disableOriginalConstructor()
@@ -259,10 +259,10 @@ public function testSortSearchPages() {
     // Declare entities out of their expected order so we can be sure they were
     // sorted. We cannot mock these because of uasort(), see
     // https://bugs.php.net/bug.php?id=50688.
-    $unsorted_entities['test4'] = new TestSearchPage(array('weight' => 0, 'status' => FALSE, 'label' => 'Test4'));
-    $unsorted_entities['test3'] = new TestSearchPage(array('weight' => 10, 'status' => TRUE, 'label' => 'Test3'));
-    $unsorted_entities['test2'] = new TestSearchPage(array('weight' => 0, 'status' => TRUE, 'label' => 'Test2'));
-    $unsorted_entities['test1'] = new TestSearchPage(array('weight' => 0, 'status' => TRUE, 'label' => 'Test1'));
+    $unsorted_entities['test4'] = new TestSearchPage(['weight' => 0, 'status' => FALSE, 'label' => 'Test4']);
+    $unsorted_entities['test3'] = new TestSearchPage(['weight' => 10, 'status' => TRUE, 'label' => 'Test3']);
+    $unsorted_entities['test2'] = new TestSearchPage(['weight' => 0, 'status' => TRUE, 'label' => 'Test2']);
+    $unsorted_entities['test1'] = new TestSearchPage(['weight' => 0, 'status' => TRUE, 'label' => 'Test1']);
     $expected = $unsorted_entities;
     ksort($expected);
 
diff --git a/core/modules/search/tests/src/Unit/SearchPluginCollectionTest.php b/core/modules/search/tests/src/Unit/SearchPluginCollectionTest.php
index 19221f26f136f321babeeaa0d9af2295e3e4d955..25ab8735a619d2102f24b8bb41573b6ce6e74905 100644
--- a/core/modules/search/tests/src/Unit/SearchPluginCollectionTest.php
+++ b/core/modules/search/tests/src/Unit/SearchPluginCollectionTest.php
@@ -37,7 +37,7 @@ class SearchPluginCollectionTest extends UnitTestCase {
    */
   protected function setUp() {
     $this->pluginManager = $this->getMock('Drupal\Component\Plugin\PluginManagerInterface');
-    $this->searchPluginCollection = new SearchPluginCollection($this->pluginManager, 'banana', array('id' => 'banana', 'color' => 'yellow'), 'fruit_stand');
+    $this->searchPluginCollection = new SearchPluginCollection($this->pluginManager, 'banana', ['id' => 'banana', 'color' => 'yellow'], 'fruit_stand');
   }
 
   /**
diff --git a/core/modules/serialization/serialization.install b/core/modules/serialization/serialization.install
index 9f7c71eb135057d447a9385069ad1a191eff2996..6d45f3c9daea853cd3bbb24dd1b0a8c4490464d1 100644
--- a/core/modules/serialization/serialization.install
+++ b/core/modules/serialization/serialization.install
@@ -12,10 +12,10 @@ function serialization_requirements($phase) {
   $requirements = [];
 
   if ($phase == 'runtime') {
-    $requirements['serialization_as_strings'] = array(
+    $requirements['serialization_as_strings'] = [
       'title' => t('Serialized data types'),
       'severity' => REQUIREMENT_INFO,
-    );
+    ];
 
     if (\Drupal::config('serialization.settings')->get('bc_primitives_as_strings')) {
       $requirements['serialization_as_strings']['value'] = t('Enabled');
diff --git a/core/modules/serialization/serialization.module b/core/modules/serialization/serialization.module
index 39c5fbfa08ff1d77f8ff415373660a31de61cf00..4b2db100ba7541c658a755b3e2fe4d8677cc1080 100644
--- a/core/modules/serialization/serialization.module
+++ b/core/modules/serialization/serialization.module
@@ -18,8 +18,8 @@ function serialization_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<p>' . t('The Serialization module provides a service for serializing and deserializing data to and from formats such as JSON and XML.') . '</p>';
       $output .= '<p>' . t('Serialization is the process of converting data structures like arrays and objects into a string. This allows the data to be represented in a way that is easy to exchange and store (for example, for transmission over the Internet or for storage in a local file system). These representations can then be deserialized to get back to the original data structures.') . '</p>';
       $output .= '<p>' . t('The serializer splits this process into two parts. Normalization converts an object to a normalized array structure. Encoding takes that array and converts it to a string.') . '</p>';
-      $output .= '<p>' . t('This module does not have a user interface. It is used by other modules which need to serialize data, such as <a href=":rest">REST</a>.', array(':rest' => (\Drupal::moduleHandler()->moduleExists('rest')) ? \Drupal::url('help.page', array('name' => 'rest')) : '#')) . '</p>';
-      $output .= '<p>' . t('For more information, see the <a href=":doc_url">online documentation for the Serialization module</a>.', array(':doc_url' => 'https://www.drupal.org/documentation/modules/serialization')) . '</p>';
+      $output .= '<p>' . t('This module does not have a user interface. It is used by other modules which need to serialize data, such as <a href=":rest">REST</a>.', [':rest' => (\Drupal::moduleHandler()->moduleExists('rest')) ? \Drupal::url('help.page', ['name' => 'rest']) : '#']) . '</p>';
+      $output .= '<p>' . t('For more information, see the <a href=":doc_url">online documentation for the Serialization module</a>.', [':doc_url' => 'https://www.drupal.org/documentation/modules/serialization']) . '</p>';
       return $output;
   }
 }
diff --git a/core/modules/serialization/src/Encoder/JsonEncoder.php b/core/modules/serialization/src/Encoder/JsonEncoder.php
index 4a16a97eb6f55068f36ea8ab87d962f08c4ddbea..ad085ac00aa88c9b7bfb213de821cd212370d64e 100644
--- a/core/modules/serialization/src/Encoder/JsonEncoder.php
+++ b/core/modules/serialization/src/Encoder/JsonEncoder.php
@@ -18,7 +18,7 @@ class JsonEncoder extends BaseJsonEncoder implements EncoderInterface, DecoderIn
    *
    * @var array
    */
-  protected static $format = array('json', 'ajax');
+  protected static $format = ['json', 'ajax'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/serialization/src/Encoder/XmlEncoder.php b/core/modules/serialization/src/Encoder/XmlEncoder.php
index abd78968a36eca3858b528e60118ef0f290ef456..5582713565a1b9aff795413134e0c8fbc87ba48a 100644
--- a/core/modules/serialization/src/Encoder/XmlEncoder.php
+++ b/core/modules/serialization/src/Encoder/XmlEncoder.php
@@ -19,7 +19,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface {
    *
    * @var array
    */
-  static protected $format = array('xml');
+  static protected $format = ['xml'];
 
   /**
    * An instance of the Symfony XmlEncoder to perform the actual encoding.
@@ -54,7 +54,7 @@ public function setBaseEncoder($encoder) {
   /**
    * {@inheritdoc}
    */
-  public function encode($data, $format, array $context = array()){
+  public function encode($data, $format, array $context = []){
     return $this->getBaseEncoder()->encode($data, $format, $context);
   }
 
@@ -68,7 +68,7 @@ public function supportsEncoding($format) {
   /**
    * {@inheritdoc}
    */
-  public function decode($data, $format, array $context = array()){
+  public function decode($data, $format, array $context = []){
     return $this->getBaseEncoder()->decode($data, $format, $context);
   }
 
diff --git a/core/modules/serialization/src/EntityResolver/ChainEntityResolver.php b/core/modules/serialization/src/EntityResolver/ChainEntityResolver.php
index 6ab879450bc2a20d5b81d924e76765274de275eb..7f24901f7f6ad461c2c578f41c7a67b74bb356f5 100644
--- a/core/modules/serialization/src/EntityResolver/ChainEntityResolver.php
+++ b/core/modules/serialization/src/EntityResolver/ChainEntityResolver.php
@@ -14,7 +14,7 @@ class ChainEntityResolver implements ChainEntityResolverInterface {
    *
    * @var \Drupal\serialization\EntityResolver\EntityResolverInterface[]
    */
-  protected $resolvers = array();
+  protected $resolvers = [];
 
   /**
    * Constructs a ChainEntityResolver object.
@@ -22,7 +22,7 @@ class ChainEntityResolver implements ChainEntityResolverInterface {
    * @param \Drupal\serialization\EntityResolver\EntityResolverInterface[] $resolvers
    *   The array of concrete resolvers.
    */
-  public function __construct(array $resolvers = array()) {
+  public function __construct(array $resolvers = []) {
     $this->resolvers = $resolvers;
   }
 
diff --git a/core/modules/serialization/src/Normalizer/ComplexDataNormalizer.php b/core/modules/serialization/src/Normalizer/ComplexDataNormalizer.php
index ef07d1185cbf057d9c5cc36f08144a758ef05a75..3d2031218f1bef4611012c075cf6529eb8aee7e9 100644
--- a/core/modules/serialization/src/Normalizer/ComplexDataNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/ComplexDataNormalizer.php
@@ -24,8 +24,8 @@ class ComplexDataNormalizer extends NormalizerBase {
   /**
    * {@inheritdoc}
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
-    $attributes = array();
+  public function normalize($object, $format = NULL, array $context = []) {
+    $attributes = [];
     /** @var \Drupal\Core\TypedData\TypedDataInterface $field */
     foreach ($object as $name => $field) {
       $attributes[$name] = $this->serializer->normalize($field, $format, $context);
diff --git a/core/modules/serialization/src/Normalizer/ConfigEntityNormalizer.php b/core/modules/serialization/src/Normalizer/ConfigEntityNormalizer.php
index d17005c172c9c62443e11327b2cf470f8beba618..344bcc3387be23e32a1bc2c26c56ba1fd1f81177 100644
--- a/core/modules/serialization/src/Normalizer/ConfigEntityNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/ConfigEntityNormalizer.php
@@ -12,12 +12,12 @@ class ConfigEntityNormalizer extends EntityNormalizer {
    *
    * @var array
    */
-  protected $supportedInterfaceOrClass = array('Drupal\Core\Config\Entity\ConfigEntityInterface');
+  protected $supportedInterfaceOrClass = ['Drupal\Core\Config\Entity\ConfigEntityInterface'];
 
   /**
    * {@inheritdoc}
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
+  public function normalize($object, $format = NULL, array $context = []) {
     return $object->toArray();
   }
 
diff --git a/core/modules/serialization/src/Normalizer/ContentEntityNormalizer.php b/core/modules/serialization/src/Normalizer/ContentEntityNormalizer.php
index b47eeef6cc93be0610d1371f5d4c023b09ce608d..f1ca82d54972e7eb654cd40079942c6dc9da112f 100644
--- a/core/modules/serialization/src/Normalizer/ContentEntityNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/ContentEntityNormalizer.php
@@ -15,10 +15,10 @@ class ContentEntityNormalizer extends EntityNormalizer {
   /**
    * {@inheritdoc}
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
-    $context += array(
+  public function normalize($object, $format = NULL, array $context = []) {
+    $context += [
       'account' => NULL,
-    );
+    ];
 
     $attributes = [];
     foreach ($object as $name => $field) {
diff --git a/core/modules/serialization/src/Normalizer/FieldItemNormalizer.php b/core/modules/serialization/src/Normalizer/FieldItemNormalizer.php
index a3cfcf206f5e64ca8cf87c7a452fe187dbb7e1c3..decca4322789eb26526ba6994a0cf603f72187ae 100644
--- a/core/modules/serialization/src/Normalizer/FieldItemNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/FieldItemNormalizer.php
@@ -19,7 +19,7 @@ class FieldItemNormalizer extends ComplexDataNormalizer implements DenormalizerI
   /**
    * {@inheritdoc}
    */
-  public function denormalize($data, $class, $format = NULL, array $context = array()) {
+  public function denormalize($data, $class, $format = NULL, array $context = []) {
     if (!isset($context['target_instance'])) {
       throw new InvalidArgumentException('$context[\'target_instance\'] must be set to denormalize with the FieldItemNormalizer');
     }
diff --git a/core/modules/serialization/src/Normalizer/FieldNormalizer.php b/core/modules/serialization/src/Normalizer/FieldNormalizer.php
index 6a0ad8f5ae28f5d5cebd1b9501cb970eb2d28ae1..a5051cfb414ff612b7c4a47732388f5645f6a5c4 100644
--- a/core/modules/serialization/src/Normalizer/FieldNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/FieldNormalizer.php
@@ -26,7 +26,7 @@ class FieldNormalizer extends ListNormalizer implements DenormalizerInterface {
   /**
    * {@inheritdoc}
    */
-  public function denormalize($data, $class, $format = NULL, array $context = array()) {
+  public function denormalize($data, $class, $format = NULL, array $context = []) {
     if (!isset($context['target_instance'])) {
       throw new InvalidArgumentException('$context[\'target_instance\'] must be set to denormalize with the FieldNormalizer');
     }
diff --git a/core/modules/serialization/src/Normalizer/ListNormalizer.php b/core/modules/serialization/src/Normalizer/ListNormalizer.php
index 1729cfce849d00b1eb3ac90e5157e319fbacd815..471886e872d9dc3b6e3c70b6223d790c33c1dc26 100644
--- a/core/modules/serialization/src/Normalizer/ListNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/ListNormalizer.php
@@ -23,8 +23,8 @@ class ListNormalizer extends NormalizerBase {
   /**
    * {@inheritdoc}
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
-    $attributes = array();
+  public function normalize($object, $format = NULL, array $context = []) {
+    $attributes = [];
     foreach ($object as $fieldItem) {
       $attributes[] = $this->serializer->normalize($fieldItem, $format, $context);
     }
diff --git a/core/modules/serialization/src/Normalizer/MarkupNormalizer.php b/core/modules/serialization/src/Normalizer/MarkupNormalizer.php
index 9cb3cd9ca78452e42859ede5975d2f9007c9758b..f4c197b6920c74e3dfc2ab065be05e5506d45112 100644
--- a/core/modules/serialization/src/Normalizer/MarkupNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/MarkupNormalizer.php
@@ -12,12 +12,12 @@ class MarkupNormalizer extends NormalizerBase {
    *
    * @var array
    */
-  protected $supportedInterfaceOrClass = array('Drupal\Component\Render\MarkupInterface');
+  protected $supportedInterfaceOrClass = ['Drupal\Component\Render\MarkupInterface'];
 
   /**
    * {@inheritdoc}
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
+  public function normalize($object, $format = NULL, array $context = []) {
     return (string) $object;
   }
 
diff --git a/core/modules/serialization/src/Normalizer/NullNormalizer.php b/core/modules/serialization/src/Normalizer/NullNormalizer.php
index c6a8de5ff528103a580e8eb488aea4ffc741d255..dbc61f78100f435b7c5f740cfc8ca9f5989859b4 100644
--- a/core/modules/serialization/src/Normalizer/NullNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/NullNormalizer.php
@@ -20,7 +20,7 @@ public function __construct($supported_interface_of_class) {
   /**
    * {@inheritdoc}
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
+  public function normalize($object, $format = NULL, array $context = []) {
     return NULL;
   }
 
diff --git a/core/modules/serialization/src/Normalizer/TypedDataNormalizer.php b/core/modules/serialization/src/Normalizer/TypedDataNormalizer.php
index 53a62df4e9235f77106fc407a8debf633262e44f..60ce7d08f696547ed1fb4ab8211aeb80fc715e19 100644
--- a/core/modules/serialization/src/Normalizer/TypedDataNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/TypedDataNormalizer.php
@@ -17,7 +17,7 @@ class TypedDataNormalizer extends NormalizerBase {
   /**
    * {@inheritdoc}
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
+  public function normalize($object, $format = NULL, array $context = []) {
     return $object->getValue();
   }
 
diff --git a/core/modules/serialization/src/RegisterEntityResolversCompilerPass.php b/core/modules/serialization/src/RegisterEntityResolversCompilerPass.php
index 90a2c26a0f633524c40fe823467ff8a7d2293c6f..47c2be0344673097d25b9740c649583f05940820 100644
--- a/core/modules/serialization/src/RegisterEntityResolversCompilerPass.php
+++ b/core/modules/serialization/src/RegisterEntityResolversCompilerPass.php
@@ -19,7 +19,7 @@ class RegisterEntityResolversCompilerPass implements CompilerPassInterface {
    */
   public function process(ContainerBuilder $container) {
     $definition = $container->getDefinition('serializer.entity_resolver');
-    $resolvers = array();
+    $resolvers = [];
 
     // Retrieve registered Normalizers and Encoders from the container.
     foreach ($container->findTaggedServiceIds('entity_resolver') as $id => $attributes) {
@@ -29,7 +29,7 @@ public function process(ContainerBuilder $container) {
 
     // Add the registered concrete EntityResolvers to the ChainEntityResolver.
     foreach ($this->sort($resolvers) as $resolver) {
-      $definition->addMethodCall('addResolver', array($resolver));
+      $definition->addMethodCall('addResolver', [$resolver]);
     }
   }
 
@@ -48,7 +48,7 @@ public function process(ContainerBuilder $container) {
    *   to low priority.
    */
   protected function sort($services) {
-    $sorted = array();
+    $sorted = [];
     krsort($services);
 
     // Flatten the array.
diff --git a/core/modules/serialization/src/RegisterSerializationClassesCompilerPass.php b/core/modules/serialization/src/RegisterSerializationClassesCompilerPass.php
index 7110056f60f70843f84bdeaaf019cafca692ebe2..10474d17e33ffcfd42b028168f49dd1fb950b506 100644
--- a/core/modules/serialization/src/RegisterSerializationClassesCompilerPass.php
+++ b/core/modules/serialization/src/RegisterSerializationClassesCompilerPass.php
@@ -46,7 +46,7 @@ public function process(ContainerBuilder $container) {
     }
 
     // Find all serialization formats known.
-    $formats = array();
+    $formats = [];
     $format_providers = [];
     foreach ($container->findTaggedServiceIds('encoder') as $service_id => $attributes) {
       $format = $attributes[0]['format'];
@@ -87,7 +87,7 @@ protected function normalizerBcSettingIsEnabled($key, $config_name) {
    *   to low priority.
    */
   protected function sort($services) {
-    $sorted = array();
+    $sorted = [];
     krsort($services);
 
     // Flatten the array.
diff --git a/core/modules/serialization/tests/modules/field_normalization_test/src/Normalization/TextItemSillyNormalizer.php b/core/modules/serialization/tests/modules/field_normalization_test/src/Normalization/TextItemSillyNormalizer.php
index 7187bdf267366240a8da616ea4a9c3f18f125a2c..45438f4074d540a9729b7b73bab03a5dfb2ff50f 100644
--- a/core/modules/serialization/tests/modules/field_normalization_test/src/Normalization/TextItemSillyNormalizer.php
+++ b/core/modules/serialization/tests/modules/field_normalization_test/src/Normalization/TextItemSillyNormalizer.php
@@ -18,7 +18,7 @@ class TextItemSillyNormalizer extends FieldItemNormalizer {
   /**
    * {@inheritdoc}
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
+  public function normalize($object, $format = NULL, array $context = []) {
     $data = parent::normalize($object, $format, $context);
     $data['value'] .= '::silly_suffix';
     return $data;
diff --git a/core/modules/serialization/tests/serialization_test/src/SerializationTestEncoder.php b/core/modules/serialization/tests/serialization_test/src/SerializationTestEncoder.php
index 0eb9aa5d9d40f1144f9097fec1ec61230e31ffc4..165e978580e0377d37e6549d643eb2830b55e532 100644
--- a/core/modules/serialization/tests/serialization_test/src/SerializationTestEncoder.php
+++ b/core/modules/serialization/tests/serialization_test/src/SerializationTestEncoder.php
@@ -16,7 +16,7 @@ class SerializationTestEncoder implements EncoderInterface {
   /**
    * {@inheritdoc}
    */
-  public function encode($data, $format, array $context = array()) {
+  public function encode($data, $format, array $context = []) {
     // @see \Drupal\serialization_test\SerializationTestNormalizer::normalize().
     return 'Normalized by ' . $data['normalized_by'] . ', Encoded by SerializationTestEncoder';
   }
diff --git a/core/modules/serialization/tests/serialization_test/src/SerializationTestNormalizer.php b/core/modules/serialization/tests/serialization_test/src/SerializationTestNormalizer.php
index 16775534f6b075e39a035b749e366d26c41d7c1d..2105adf5981f85f89dbc8a817ae50beb772ec1ab 100644
--- a/core/modules/serialization/tests/serialization_test/src/SerializationTestNormalizer.php
+++ b/core/modules/serialization/tests/serialization_test/src/SerializationTestNormalizer.php
@@ -25,7 +25,7 @@ class SerializationTestNormalizer implements NormalizerInterface {
    *   An array containing a normalized representation of $object, appropriate
    *   for encoding to the requested format.
    */
-  public function normalize($object, $format = NULL, array $context = array()) {
+  public function normalize($object, $format = NULL, array $context = []) {
     $normalized = (array) $object;
     // Add identifying value that can be used to verify that the expected
     // normalizer was invoked.
diff --git a/core/modules/serialization/tests/src/Kernel/EntityResolverTest.php b/core/modules/serialization/tests/src/Kernel/EntityResolverTest.php
index ec94028f390e31d5e11ca7e2ad3171a001ad21c3..a470d98a74004a167d107d1e67f195b15814d1ea 100644
--- a/core/modules/serialization/tests/src/Kernel/EntityResolverTest.php
+++ b/core/modules/serialization/tests/src/Kernel/EntityResolverTest.php
@@ -34,14 +34,14 @@ protected function setUp() {
     \Drupal::service('router.builder')->rebuild();
 
     // Create the test field storage.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test_mulrev',
       'field_name' => 'field_test_entity_reference',
       'type' => 'entity_reference',
-      'settings' => array(
+      'settings' => [
         'target_type' => 'entity_test_mulrev',
-      ),
-    ))->save();
+      ],
+    ])->save();
 
     // Create the test field.
     FieldConfig::create([
@@ -56,39 +56,39 @@ protected function setUp() {
    */
   function testUuidEntityResolver() {
     // Create an entity to get the UUID from.
-    $entity = EntityTestMulRev::create(array('type' => 'entity_test_mulrev'));
+    $entity = EntityTestMulRev::create(['type' => 'entity_test_mulrev']);
     $entity->set('name', 'foobar');
-    $entity->set('field_test_entity_reference', array(array('target_id' => 1)));
+    $entity->set('field_test_entity_reference', [['target_id' => 1]]);
     $entity->save();
 
-    $field_uri = Url::fromUri('base:rest/relation/entity_test_mulrev/entity_test_mulrev/field_test_entity_reference', array('absolute' => TRUE))->toString();
+    $field_uri = Url::fromUri('base:rest/relation/entity_test_mulrev/entity_test_mulrev/field_test_entity_reference', ['absolute' => TRUE])->toString();
 
-    $data = array(
-      '_links' => array(
-        'type' => array(
-          'href' => Url::fromUri('base:rest/type/entity_test_mulrev/entity_test_mulrev', array('absolute' => TRUE))->toString(),
-        ),
-        $field_uri => array(
-          array(
+    $data = [
+      '_links' => [
+        'type' => [
+          'href' => Url::fromUri('base:rest/type/entity_test_mulrev/entity_test_mulrev', ['absolute' => TRUE])->toString(),
+        ],
+        $field_uri => [
+          [
             'href' => $entity->url(),
-          ),
-        ),
-      ),
-      '_embedded' => array(
-        $field_uri => array(
-          array(
-            '_links' => array(
+          ],
+        ],
+      ],
+      '_embedded' => [
+        $field_uri => [
+          [
+            '_links' => [
               'self' => $entity->url(),
-            ),
-            'uuid' => array(
-              array(
+            ],
+            'uuid' => [
+              [
                 'value' => $entity->uuid(),
-              ),
-            ),
-          ),
-        ),
-      ),
-    );
+              ],
+            ],
+          ],
+        ],
+      ],
+    ];
 
     $denormalized = $this->container->get('serializer')->denormalize($data, 'Drupal\entity_test\Entity\EntityTestMulRev', $this->format);
     $field_value = $denormalized->get('field_test_entity_reference')->getValue();
diff --git a/core/modules/serialization/tests/src/Kernel/EntitySerializationTest.php b/core/modules/serialization/tests/src/Kernel/EntitySerializationTest.php
index d29f4937f0259821b7be7bf4fe6b345e09265e6e..71fa6b3ec584d83f3c46b67de1bc15aa961c44bd 100644
--- a/core/modules/serialization/tests/src/Kernel/EntitySerializationTest.php
+++ b/core/modules/serialization/tests/src/Kernel/EntitySerializationTest.php
@@ -17,7 +17,7 @@ class EntitySerializationTest extends NormalizerTestBase {
    *
    * @var array
    */
-  public static $modules = array('serialization', 'system', 'field', 'entity_test', 'text', 'filter', 'user', 'entity_serialization_test');
+  public static $modules = ['serialization', 'system', 'field', 'entity_test', 'text', 'filter', 'user', 'entity_serialization_test'];
 
   /**
    * The test values.
@@ -58,7 +58,7 @@ protected function setUp() {
     parent::setUp();
 
     // User create needs sequence table.
-    $this->installSchema('system', array('sequences'));
+    $this->installSchema('system', ['sequences']);
 
     // Create a test user to use as the entity owner.
     $this->user = \Drupal::entityManager()->getStorage('user')->create([
@@ -69,75 +69,75 @@ protected function setUp() {
     $this->user->save();
 
     // Create a test entity to serialize.
-    $this->values = array(
+    $this->values = [
       'name' => $this->randomMachineName(),
       'user_id' => $this->user->id(),
-      'field_test_text' => array(
+      'field_test_text' => [
         'value' => $this->randomMachineName(),
         'format' => 'full_html',
-      ),
-    );
+      ],
+    ];
     $this->entity = EntityTestMulRev::create($this->values);
     $this->entity->save();
 
     $this->serializer = $this->container->get('serializer');
 
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
   }
 
   /**
    * Test the normalize function.
    */
   public function testNormalize() {
-    $expected = array(
-      'id' => array(
-        array('value' => 1),
-      ),
-      'uuid' => array(
-        array('value' => $this->entity->uuid()),
-      ),
-      'langcode' => array(
-        array('value' => 'en'),
-      ),
-      'name' => array(
-        array('value' => $this->values['name']),
-      ),
-      'type' => array(
-        array('value' => 'entity_test_mulrev'),
-      ),
-      'created' => array(
-        array('value' => $this->entity->created->value),
-      ),
-      'user_id' => array(
-        array(
+    $expected = [
+      'id' => [
+        ['value' => 1],
+      ],
+      'uuid' => [
+        ['value' => $this->entity->uuid()],
+      ],
+      'langcode' => [
+        ['value' => 'en'],
+      ],
+      'name' => [
+        ['value' => $this->values['name']],
+      ],
+      'type' => [
+        ['value' => 'entity_test_mulrev'],
+      ],
+      'created' => [
+        ['value' => $this->entity->created->value],
+      ],
+      'user_id' => [
+        [
           // id() will return the string value as it comes from the database.
           'target_id' => (int) $this->user->id(),
           'target_type' => $this->user->getEntityTypeId(),
           'target_uuid' => $this->user->uuid(),
           'url' => $this->user->url(),
-        ),
-      ),
-      'revision_id' => array(
-        array('value' => 1),
-      ),
-      'default_langcode' => array(
-        array('value' => TRUE),
-      ),
-      'non_rev_field' => array(),
-      'field_test_text' => array(
-        array(
+        ],
+      ],
+      'revision_id' => [
+        ['value' => 1],
+      ],
+      'default_langcode' => [
+        ['value' => TRUE],
+      ],
+      'non_rev_field' => [],
+      'field_test_text' => [
+        [
           'value' => $this->values['field_test_text']['value'],
           'format' => $this->values['field_test_text']['format'],
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     $normalized = $this->serializer->normalize($this->entity);
 
     foreach (array_keys($expected) as $fieldName) {
       $this->assertSame($expected[$fieldName], $normalized[$fieldName], "Normalization produces expected array for $fieldName.");
     }
-    $this->assertEqual(array_diff_key($normalized, $expected), array(), 'No unexpected data is added to the normalized array.');
+    $this->assertEqual(array_diff_key($normalized, $expected), [], 'No unexpected data is added to the normalized array.');
   }
 
   /**
@@ -182,7 +182,7 @@ public function testSerialize() {
 
     // Generate the expected xml in a way that allows changes to entity property
     // order.
-    $expected = array(
+    $expected = [
       'id' => '<id><value>' . $this->entity->id() . '</value></id>',
       'uuid' => '<uuid><value>' . $this->entity->uuid() . '</value></uuid>',
       'langcode' => '<langcode><value>en</value></langcode>',
@@ -194,7 +194,7 @@ public function testSerialize() {
       'default_langcode' => '<default_langcode><value>1</value></default_langcode>',
       'non_rev_field' => '<non_rev_field/>',
       'field_test_text' => '<field_test_text><value>' . $this->values['field_test_text']['value'] . '</value><format>' . $this->values['field_test_text']['format'] . '</format></field_test_text>',
-    );
+    ];
     // Sort it in the same order as normalised.
     $expected = array_merge($normalized, $expected);
     // Add header and footer.
@@ -215,9 +215,9 @@ public function testSerialize() {
   public function testDenormalize() {
     $normalized = $this->serializer->normalize($this->entity);
 
-    foreach (array('json', 'xml') as $type) {
-      $denormalized = $this->serializer->denormalize($normalized, $this->entityClass, $type, array('entity_type' => 'entity_test_mulrev'));
-      $this->assertTrue($denormalized instanceof $this->entityClass, SafeMarkup::format('Denormalized entity is an instance of @class', array('@class' => $this->entityClass)));
+    foreach (['json', 'xml'] as $type) {
+      $denormalized = $this->serializer->denormalize($normalized, $this->entityClass, $type, ['entity_type' => 'entity_test_mulrev']);
+      $this->assertTrue($denormalized instanceof $this->entityClass, SafeMarkup::format('Denormalized entity is an instance of @class', ['@class' => $this->entityClass]));
       $this->assertIdentical($denormalized->getEntityTypeId(), $this->entity->getEntityTypeId(), 'Expected entity type found.');
       $this->assertIdentical($denormalized->bundle(), $this->entity->bundle(), 'Expected entity bundle found.');
       $this->assertIdentical($denormalized->uuid(), $this->entity->uuid(), 'Expected entity UUID found.');
diff --git a/core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php b/core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php
index b9f0425fae3b68f54a6af1e98a95b09ec09e2899..3e41d63037409bd9087f92b275a6319d3db5659a 100644
--- a/core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php
+++ b/core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php
@@ -17,7 +17,7 @@ class FieldItemSerializationTest extends NormalizerTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('serialization', 'system', 'field', 'entity_test', 'text', 'filter', 'user', 'field_normalization_test');
+  public static $modules = ['serialization', 'system', 'field', 'entity_test', 'text', 'filter', 'user', 'field_normalization_test'];
 
   /**
    * The class name of the test class.
@@ -54,14 +54,14 @@ protected function setUp() {
     parent::setUp();
 
     // Auto-create a field for testing default field values.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test_mulrev',
       'field_name' => 'field_test_text_default',
       'type' => 'text',
       'cardinality' => 1,
       'translatable' => FALSE,
-    ))->save();
-    FieldConfig::create(array(
+    ])->save();
+    FieldConfig::create([
       'entity_type' => 'entity_test_mulrev',
       'field_name' => 'field_test_text_default',
       'bundle' => 'entity_test_mulrev',
@@ -72,26 +72,26 @@ protected function setUp() {
           'format' => 'full_html',
         ],
       ],
-      'widget' => array(
+      'widget' => [
         'type' => 'text_textfield',
         'weight' => 0,
-      ),
-    ))->save();
+      ],
+    ])->save();
 
     // Create a test entity to serialize.
-    $this->values = array(
+    $this->values = [
       'name' => $this->randomMachineName(),
-      'field_test_text' => array(
+      'field_test_text' => [
         'value' => $this->randomMachineName(),
         'format' => 'full_html',
-      ),
-    );
+      ],
+    ];
     $this->entity = EntityTestMulRev::create($this->values);
     $this->entity->save();
 
     $this->serializer = $this->container->get('serializer');
 
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
   }
 
   /**
diff --git a/core/modules/serialization/tests/src/Kernel/NormalizerTestBase.php b/core/modules/serialization/tests/src/Kernel/NormalizerTestBase.php
index 7706b6d17819b13cc19d81c3aa0011572feb3c6e..25299b16f02389d5054d9d3a7b985cc0524e7b2c 100644
--- a/core/modules/serialization/tests/src/Kernel/NormalizerTestBase.php
+++ b/core/modules/serialization/tests/src/Kernel/NormalizerTestBase.php
@@ -16,35 +16,35 @@ abstract class NormalizerTestBase extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('serialization', 'system', 'field', 'entity_test', 'text', 'filter', 'user');
+  public static $modules = ['serialization', 'system', 'field', 'entity_test', 'text', 'filter', 'user'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->installEntitySchema('entity_test_mulrev');
     $this->installEntitySchema('user');
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
     \Drupal::service('router.builder')->rebuild();
     \Drupal::moduleHandler()->invoke('rest', 'install');
 
     // Auto-create a field for testing.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'entity_test_mulrev',
       'field_name' => 'field_test_text',
       'type' => 'text',
       'cardinality' => 1,
       'translatable' => FALSE,
-    ))->save();
-    FieldConfig::create(array(
+    ])->save();
+    FieldConfig::create([
       'entity_type' => 'entity_test_mulrev',
       'field_name' => 'field_test_text',
       'bundle' => 'entity_test_mulrev',
       'label' => 'Test text-field',
-      'widget' => array(
+      'widget' => [
         'type' => 'text_textfield',
         'weight' => 0,
-      ),
-    ))->save();
+      ],
+    ])->save();
   }
 
 }
diff --git a/core/modules/serialization/tests/src/Kernel/SerializationTest.php b/core/modules/serialization/tests/src/Kernel/SerializationTest.php
index 8b700a32813b0179d133ebce273c621ef0c6d801..a7ad145e65756d532de9cd022b5c433def714689 100644
--- a/core/modules/serialization/tests/src/Kernel/SerializationTest.php
+++ b/core/modules/serialization/tests/src/Kernel/SerializationTest.php
@@ -17,7 +17,7 @@ class SerializationTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('serialization', 'serialization_test');
+  public static $modules = ['serialization', 'serialization_test'];
 
   /**
    * The serializer service to test.
diff --git a/core/modules/serialization/tests/src/Unit/Encoder/XmlEncoderTest.php b/core/modules/serialization/tests/src/Unit/Encoder/XmlEncoderTest.php
index ea38aa991cc147847aea07fb601684a35ad2e42a..88c7a1d8ea11cf7e6f5b2f3a589072898d701d3d 100644
--- a/core/modules/serialization/tests/src/Unit/Encoder/XmlEncoderTest.php
+++ b/core/modules/serialization/tests/src/Unit/Encoder/XmlEncoderTest.php
@@ -28,7 +28,7 @@ class XmlEncoderTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $testArray = array('test' => 'test');
+  protected $testArray = ['test' => 'test'];
 
   protected function setUp() {
     $this->baseEncoder = $this->getMock('Symfony\Component\Serializer\Encoder\XmlEncoder');
@@ -58,7 +58,7 @@ public function testSupportsDecoding() {
   public function testEncode() {
     $this->baseEncoder->expects($this->once())
       ->method('encode')
-      ->with($this->testArray, 'test', array())
+      ->with($this->testArray, 'test', [])
       ->will($this->returnValue('test'));
 
     $this->assertEquals('test', $this->encoder->encode($this->testArray, 'test'));
@@ -70,7 +70,7 @@ public function testEncode() {
   public function testDecode() {
     $this->baseEncoder->expects($this->once())
       ->method('decode')
-      ->with('test', 'test', array())
+      ->with('test', 'test', [])
       ->will($this->returnValue($this->testArray));
 
     $this->assertEquals($this->testArray, $this->encoder->decode('test', 'test'));
diff --git a/core/modules/serialization/tests/src/Unit/EntityResolver/ChainEntityResolverTest.php b/core/modules/serialization/tests/src/Unit/EntityResolver/ChainEntityResolverTest.php
index 38819e11e54e786cac2424634291864b64381a30..64e73b693d3763a2c0dd8237cc2bc85b4d7fedcb 100644
--- a/core/modules/serialization/tests/src/Unit/EntityResolver/ChainEntityResolverTest.php
+++ b/core/modules/serialization/tests/src/Unit/EntityResolver/ChainEntityResolverTest.php
@@ -47,10 +47,10 @@ protected function setUp() {
    * @covers ::resolve
    */
   public function testResolverWithNoneResolved() {
-    $resolvers = array(
+    $resolvers = [
       $this->createEntityResolverMock(),
       $this->createEntityResolverMock(),
-    );
+    ];
 
     $resolver = new ChainEntityResolver($resolvers);
 
@@ -78,10 +78,10 @@ public function testResolverWithNoneResolvedUsingAddResolver() {
    * @covers ::resolve
    */
   public function testResolverWithFirstResolved() {
-    $resolvers = array(
+    $resolvers = [
       $this->createEntityResolverMock(10),
       $this->createEntityResolverMock(NULL, FALSE),
-    );
+    ];
 
     $resolver = new ChainEntityResolver($resolvers);
 
@@ -95,10 +95,10 @@ public function testResolverWithFirstResolved() {
    * @covers ::resolve
    */
   public function testResolverWithLastResolved() {
-    $resolvers = array(
+    $resolvers = [
       $this->createEntityResolverMock(),
       $this->createEntityResolverMock(10),
-    );
+    ];
 
     $resolver = new ChainEntityResolver($resolvers);
 
@@ -112,10 +112,10 @@ public function testResolverWithLastResolved() {
    * @covers ::resolve
    */
   public function testResolverWithResolvedToZero() {
-    $resolvers = array(
+    $resolvers = [
       $this->createEntityResolverMock(0),
       $this->createEntityResolverMock(NULL, FALSE),
-    );
+    ];
 
     $resolver = new ChainEntityResolver($resolvers);
 
diff --git a/core/modules/serialization/tests/src/Unit/EntityResolver/UuidResolverTest.php b/core/modules/serialization/tests/src/Unit/EntityResolver/UuidResolverTest.php
index a05d417a9b75cb6ff018a2e1c8ca88f01f8eb59c..812392568a6f47bdf5669ebd5d2f25080a3cdfe5 100644
--- a/core/modules/serialization/tests/src/Unit/EntityResolver/UuidResolverTest.php
+++ b/core/modules/serialization/tests/src/Unit/EntityResolver/UuidResolverTest.php
@@ -44,7 +44,7 @@ public function testResolveNotInInterface() {
       ->method('loadEntityByUuid');
 
     $normalizer = $this->getMock('Symfony\Component\Serializer\Normalizer\NormalizerInterface');
-    $this->assertNull($this->resolver->resolve($normalizer, array(), 'test_type'));
+    $this->assertNull($this->resolver->resolve($normalizer, [], 'test_type'));
   }
 
   /**
@@ -57,9 +57,9 @@ public function testResolveNoUuid() {
     $normalizer = $this->getMock('Drupal\serialization\EntityResolver\UuidReferenceInterface');
     $normalizer->expects($this->once())
       ->method('getUuid')
-      ->with(array())
+      ->with([])
       ->will($this->returnValue(NULL));
-    $this->assertNull($this->resolver->resolve($normalizer, array(), 'test_type'));
+    $this->assertNull($this->resolver->resolve($normalizer, [], 'test_type'));
   }
 
   /**
@@ -76,10 +76,10 @@ public function testResolveNoEntity() {
     $normalizer = $this->getMock('Drupal\serialization\EntityResolver\UuidReferenceInterface');
     $normalizer->expects($this->once())
       ->method('getUuid')
-      ->with(array())
+      ->with([])
       ->will($this->returnValue($uuid));
 
-    $this->assertNull($this->resolver->resolve($normalizer, array(), 'test_type'));
+    $this->assertNull($this->resolver->resolve($normalizer, [], 'test_type'));
   }
 
   /**
@@ -101,9 +101,9 @@ public function testResolveWithEntity() {
     $normalizer = $this->getMock('Drupal\serialization\EntityResolver\UuidReferenceInterface');
     $normalizer->expects($this->once())
       ->method('getUuid')
-      ->with(array())
+      ->with([])
       ->will($this->returnValue($uuid));
-    $this->assertSame(1, $this->resolver->resolve($normalizer, array(), 'test_type'));
+    $this->assertSame(1, $this->resolver->resolve($normalizer, [], 'test_type'));
   }
 
 }
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/ConfigEntityNormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/ConfigEntityNormalizerTest.php
index ec9a4d07ce271cd7d1154b486cc5b8b0614fec7e..371450a5025f51196c2fd564cfdf4a8f6da28690 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/ConfigEntityNormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/ConfigEntityNormalizerTest.php
@@ -17,7 +17,7 @@ class ConfigEntityNormalizerTest extends UnitTestCase {
    * @covers ::normalize
    */
   public function testNormalize() {
-    $test_export_properties = array('test' => 'test');
+    $test_export_properties = ['test' => 'test'];
 
     $entity_manager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
     $normalizer = new ConfigEntityNormalizer($entity_manager);
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/ContentEntityNormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/ContentEntityNormalizerTest.php
index 9613fdbb9ed42ad9016ba16b26cc89e3912160f7..4beecf420dbb8a7a156eda4cbe3b468fb268fc5d 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/ContentEntityNormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/ContentEntityNormalizerTest.php
@@ -40,7 +40,7 @@ protected function setUp() {
     $this->contentEntityNormalizer = new ContentEntityNormalizer($this->entityManager);
     $this->serializer = $this->getMockBuilder('Symfony\Component\Serializer\Serializer')
       ->disableOriginalConstructor()
-      ->setMethods(array('normalize'))
+      ->setMethods(['normalize'])
       ->getMock();
     $this->contentEntityNormalizer->setSerializer($this->serializer);
   }
@@ -66,10 +66,10 @@ public function testNormalize() {
       ->with($this->containsOnlyInstancesOf('Drupal\Core\Field\FieldItemListInterface'), 'test_format', ['account' => NULL])
       ->will($this->returnValue('test'));
 
-    $definitions = array(
+    $definitions = [
       'field_1' => $this->createMockFieldListItem(),
       'field_2' => $this->createMockFieldListItem(FALSE),
-    );
+    ];
     $content_entity_mock = $this->createMockForContentEntity($definitions);
 
     $normalized = $this->contentEntityNormalizer->normalize($content_entity_mock, 'test_format');
@@ -98,10 +98,10 @@ public function testNormalizeWithAccountContext() {
 
     // The mock account should get passed directly into the access() method on
     // field items from $context['account'].
-    $definitions = array(
+    $definitions = [
       'field_1' => $this->createMockFieldListItem(TRUE, $mock_account),
       'field_2' => $this->createMockFieldListItem(FALSE, $mock_account),
-    );
+    ];
     $content_entity_mock = $this->createMockForContentEntity($definitions);
 
     $normalized = $this->contentEntityNormalizer->normalize($content_entity_mock, 'test_format', $context);
@@ -121,7 +121,7 @@ public function testNormalizeWithAccountContext() {
   public function createMockForContentEntity($definitions) {
     $content_entity_mock = $this->getMockBuilder('Drupal\Core\Entity\ContentEntityBase')
       ->disableOriginalConstructor()
-      ->setMethods(array('getFields'))
+      ->setMethods(['getFields'])
       ->getMockForAbstractClass();
     $content_entity_mock->expects($this->once())
       ->method('getFields')
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/EntityNormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/EntityNormalizerTest.php
index b3b2780fd0118f1c3c985e45258231f5320aaddd..eb894cafc0f74aad14c85689f3f8c7882a58da9d 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/EntityNormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/EntityNormalizerTest.php
@@ -51,14 +51,14 @@ public function testNormalize() {
     $list_item_1 = $this->getMock('Drupal\Core\TypedData\TypedDataInterface');
     $list_item_2 = $this->getMock('Drupal\Core\TypedData\TypedDataInterface');
 
-    $definitions = array(
+    $definitions = [
       'field_1' => $list_item_1,
       'field_2' => $list_item_2,
-    );
+    ];
 
     $content_entity = $this->getMockBuilder('Drupal\Core\Entity\ContentEntityBase')
       ->disableOriginalConstructor()
-      ->setMethods(array('getFields'))
+      ->setMethods(['getFields'])
       ->getMockForAbstractClass();
     $content_entity->expects($this->once())
       ->method('getFields')
@@ -66,7 +66,7 @@ public function testNormalize() {
 
     $serializer = $this->getMockBuilder('Symfony\Component\Serializer\Serializer')
       ->disableOriginalConstructor()
-      ->setMethods(array('normalize'))
+      ->setMethods(['normalize'])
       ->getMock();
     $serializer->expects($this->at(0))
       ->method('normalize')
@@ -88,7 +88,7 @@ public function testNormalize() {
    * @expectedException \Symfony\Component\Serializer\Exception\UnexpectedValueException
    */
   public function testDenormalizeWithNoEntityType() {
-    $this->entityNormalizer->denormalize(array(), 'Drupal\Core\Entity\ContentEntityBase');
+    $this->entityNormalizer->denormalize([], 'Drupal\Core\Entity\ContentEntityBase');
   }
 
   /**
@@ -180,9 +180,9 @@ public function testDenormalizeWithValidBundle() {
 
     $storage = $this->getMock('Drupal\Core\Entity\EntityStorageInterface');
     // Create should only be called with the bundle property at first.
-    $expected_test_data = array(
+    $expected_test_data = [
       'test_type' => 'test_bundle',
-    );
+    ];
 
     $storage->expects($this->once())
       ->method('create')
@@ -198,7 +198,7 @@ public function testDenormalizeWithValidBundle() {
     // item.
     $serializer = $this->getMockBuilder('Symfony\Component\Serializer\Serializer')
       ->disableOriginalConstructor()
-      ->setMethods(array('denormalize'))
+      ->setMethods(['denormalize'])
       ->getMock();
     $serializer->expects($this->at(0))
       ->method('denormalize')
@@ -297,10 +297,10 @@ public function testDenormalizeWithInvalidBundle() {
    * @covers ::denormalize
    */
   public function testDenormalizeWithNoBundle() {
-    $test_data = array(
+    $test_data = [
       'key_1' => 'value_1',
       'key_2' => 'value_2',
-    );
+    ];
 
     $entity_type = $this->getMock('Drupal\Core\Entity\EntityTypeInterface');
     $entity_type->expects($this->once())
@@ -329,7 +329,7 @@ public function testDenormalizeWithNoBundle() {
     $this->entityManager->expects($this->never())
       ->method('getBaseFieldDefinitions');
 
-    $this->assertNotNull($this->entityNormalizer->denormalize($test_data, 'Drupal\Core\Entity\ContentEntityBase', NULL, array('entity_type' => 'test')));
+    $this->assertNotNull($this->entityNormalizer->denormalize($test_data, 'Drupal\Core\Entity\ContentEntityBase', NULL, ['entity_type' => 'test']));
   }
 
 }
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/ListNormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/ListNormalizerTest.php
index bbc7c110309e45041af7f32aa91b93ae0ffa06b8..fccc6dbaa0d7c9c8015dc7621aaded9e8fb2fe78 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/ListNormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/ListNormalizerTest.php
@@ -34,7 +34,7 @@ class ListNormalizerTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $expectedListValues = array('test', 'test', 'test');
+  protected $expectedListValues = ['test', 'test', 'test'];
 
   /**
    * The mocked typed data.
@@ -54,7 +54,7 @@ protected function setUp() {
     // Set up a mock container as ItemList() will call for the 'typed_data_manager'
     // service.
     $container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerBuilder')
-      ->setMethods(array('get'))
+      ->setMethods(['get'])
       ->getMock();
     $container->expects($this->any())
       ->method('get')
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php
index e77882ace9090d525dcaa1111db710061881080c..f5e8f0f7b5e93c9ed746e49f2a5a13d1b76ec587 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php
@@ -45,20 +45,20 @@ public function testSupportsNormalization($expected_return, $data, $supported_in
    *   An array of provider data for testSupportsNormalization.
    */
   public function providerTestSupportsNormalization() {
-    return array(
+    return [
       // Something that is not an object should return FALSE immediately.
-      array(FALSE, array()),
+      [FALSE, []],
       // An object with no class set should return FALSE.
-      array(FALSE, new \stdClass()),
+      [FALSE, new \stdClass()],
       // Set a supported Class.
-      array(TRUE, new \stdClass(), 'stdClass'),
+      [TRUE, new \stdClass(), 'stdClass'],
       // Set a supported interface.
-      array(TRUE, new \RecursiveArrayIterator(), 'RecursiveIterator'),
+      [TRUE, new \RecursiveArrayIterator(), 'RecursiveIterator'],
       // Set a different class.
-      array(FALSE, new \stdClass(), 'ArrayIterator'),
+      [FALSE, new \stdClass(), 'ArrayIterator'],
       // Set a different interface.
-      array(FALSE, new \stdClass(), 'RecursiveIterator'),
-    );
+      [FALSE, new \stdClass(), 'RecursiveIterator'],
+    ];
   }
 
 }
diff --git a/core/modules/shortcut/shortcut.install b/core/modules/shortcut/shortcut.install
index 8df408fe914572e219780281cd41ebc5edff373c..21ebf51942245a952cb43bf2cb83006f3b2fad64 100644
--- a/core/modules/shortcut/shortcut.install
+++ b/core/modules/shortcut/shortcut.install
@@ -9,39 +9,39 @@
  * Implements hook_schema().
  */
 function shortcut_schema() {
-  $schema['shortcut_set_users'] = array(
+  $schema['shortcut_set_users'] = [
     'description' => 'Maps users to shortcut sets.',
-    'fields' => array(
-      'uid' => array(
+    'fields' => [
+      'uid' => [
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'description' => 'The {users}.uid for this set.',
-      ),
-      'set_name' => array(
+      ],
+      'set_name' => [
         'type' => 'varchar_ascii',
         'length' => 32,
         'not null' => TRUE,
         'default' => '',
         'description' => "The {shortcut_set}.set_name that will be displayed for this user.",
-      ),
-    ),
-    'primary key' => array('uid'),
-    'indexes' => array(
-      'set_name' => array('set_name'),
-    ),
-    'foreign keys' => array(
-      'set_user' => array(
+      ],
+    ],
+    'primary key' => ['uid'],
+    'indexes' => [
+      'set_name' => ['set_name'],
+    ],
+    'foreign keys' => [
+      'set_user' => [
         'table' => 'users',
-        'columns' => array('uid' => 'uid'),
-      ),
-      'set_name' => array(
+        'columns' => ['uid' => 'uid'],
+      ],
+      'set_name' => [
         'table' => 'shortcut_set',
-        'columns' => array('set_name' => 'set_name'),
-      ),
-    ),
-  );
+        'columns' => ['set_name' => 'set_name'],
+      ],
+    ],
+  ];
 
   return $schema;
 }
diff --git a/core/modules/shortcut/shortcut.module b/core/modules/shortcut/shortcut.module
index b7294ad65ffe2d811d408bd69f71c97bebc588ab..156b4914c55768575d1c1a5bd5ed472c949c0565 100644
--- a/core/modules/shortcut/shortcut.module
+++ b/core/modules/shortcut/shortcut.module
@@ -20,16 +20,16 @@ function shortcut_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.shortcut':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Shortcut module allows users to create sets of <em>shortcut</em> links to commonly-visited pages of the site. Shortcuts are contained within <em>sets</em>. Each user with <em>Select any shortcut set</em> permission can select a shortcut set created by anyone at the site. For more information, see the <a href=":shortcut">online documentation for the Shortcut module</a>.', array(':shortcut' => 'https://www.drupal.org/documentation/modules/shortcut')) . '</p>';
+      $output .= '<p>' . t('The Shortcut module allows users to create sets of <em>shortcut</em> links to commonly-visited pages of the site. Shortcuts are contained within <em>sets</em>. Each user with <em>Select any shortcut set</em> permission can select a shortcut set created by anyone at the site. For more information, see the <a href=":shortcut">online documentation for the Shortcut module</a>.', [':shortcut' => 'https://www.drupal.org/documentation/modules/shortcut']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl><dt>' . t('Administering shortcuts') . '</dt>';
-      $output .= '<dd>' . t('Users with the <em>Administer shortcuts</em> permission can manage shortcut sets and edit the shortcuts within sets from the <a href=":shortcuts">Shortcuts administration page</a>.', array(':shortcuts' => \Drupal::url('entity.shortcut_set.collection'))) . '</dd>';
+      $output .= '<dd>' . t('Users with the <em>Administer shortcuts</em> permission can manage shortcut sets and edit the shortcuts within sets from the <a href=":shortcuts">Shortcuts administration page</a>.', [':shortcuts' => \Drupal::url('entity.shortcut_set.collection')]) . '</dd>';
       $output .= '<dt>' . t('Choosing shortcut sets') . '</dt>';
       $output .= '<dd>' . t('Users with permission to switch shortcut sets can choose a shortcut set to use from the Shortcuts tab of their user account page.') . '</dd>';
       $output .= '<dt>' . t('Adding and removing shortcuts') . '</dt>';
       $output .= '<dd>' . t('The Shortcut module creates an add/remove link for each page on your site; the link lets you add or remove the current page from the currently-enabled set of shortcuts (if your theme displays it and you have permission to edit your shortcut set). The core Seven administration theme displays this link next to the page title, as a grey or yellow star. If you click on the grey star, you will add that page to your preferred set of shortcuts. If the page is already part of your shortcut set, the link will be a yellow star, and will allow you to remove the current page from your shortcut set.') . '</dd>';
       $output .= '<dt>' . t('Displaying shortcuts') . '</dt>';
-      $output .= '<dd>' . t('You can display your shortcuts by enabling the <em>Shortcuts</em> block on the <a href=":blocks">Blocks administration page</a>. Certain administrative modules also display your shortcuts; for example, the core <a href=":toolbar-help">Toolbar module</a> provides a corresponding menu item.', array(':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#', ':toolbar-help' => (\Drupal::moduleHandler()->moduleExists('toolbar')) ? \Drupal::url('help.page', array('name' => 'toolbar')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('You can display your shortcuts by enabling the <em>Shortcuts</em> block on the <a href=":blocks">Blocks administration page</a>. Certain administrative modules also display your shortcuts; for example, the core <a href=":toolbar-help">Toolbar module</a> provides a corresponding menu item.', [':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#', ':toolbar-help' => (\Drupal::moduleHandler()->moduleExists('toolbar')) ? \Drupal::url('help.page', ['name' => 'toolbar']) : '#']) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -38,7 +38,7 @@ function shortcut_help($route_name, RouteMatchInterface $route_match) {
     case 'entity.shortcut_set.edit_form':
       $user = \Drupal::currentUser();
       if ($user->hasPermission('access shortcuts') && $user->hasPermission('switch shortcut sets')) {
-        $output = '<p>' . t('Define which shortcut set you are using on the <a href=":shortcut-link">Shortcuts tab</a> of your account page.', array(':shortcut-link' => \Drupal::url('shortcut.set_switch', array('user' => $user->id())))) . '</p>';
+        $output = '<p>' . t('Define which shortcut set you are using on the <a href=":shortcut-link">Shortcuts tab</a> of your account page.', [':shortcut-link' => \Drupal::url('shortcut.set_switch', ['user' => $user->id()])]) . '</p>';
         return $output;
       }
   }
@@ -162,7 +162,7 @@ function shortcut_set_unassign_user($account) {
  *   the default set is returned.
  */
 function shortcut_current_displayed_set($account = NULL) {
-  $shortcut_sets = &drupal_static(__FUNCTION__, array());
+  $shortcut_sets = &drupal_static(__FUNCTION__, []);
   $user = \Drupal::currentUser();
   if (!isset($account)) {
     $account = $user;
@@ -209,7 +209,7 @@ function shortcut_default_set($account = NULL) {
   // have one, we allow the last module which returns a valid result to take
   // precedence. If no module returns a valid set, fall back on the site-wide
   // default, which is the lowest-numbered shortcut set.
-  $suggestions = array_reverse(\Drupal::moduleHandler()->invokeAll('shortcut_default_set', array($account)));
+  $suggestions = array_reverse(\Drupal::moduleHandler()->invokeAll('shortcut_default_set', [$account]));
   $suggestions[] = 'default';
   foreach ($suggestions as $name) {
     if ($shortcut_set = ShortcutSet::load($name)) {
@@ -252,37 +252,37 @@ function shortcut_set_title_exists($title) {
  *   An array of shortcut links, in the format returned by the menu system.
  */
 function shortcut_renderable_links($shortcut_set = NULL) {
-  $shortcut_links = array();
+  $shortcut_links = [];
 
   if (!isset($shortcut_set)) {
     $shortcut_set = shortcut_current_displayed_set();
   }
 
-  $cache_tags = array();
+  $cache_tags = [];
   foreach ($shortcut_set->getShortcuts() as $shortcut) {
     $shortcut = \Drupal::entityManager()->getTranslationFromContext($shortcut);
     $url = $shortcut->getUrl();
     if ($url->access()) {
-      $links[$shortcut->id()] = array(
+      $links[$shortcut->id()] = [
         'type' => 'link',
         'title' => $shortcut->label(),
         'url' => $shortcut->getUrl(),
-      );
+      ];
       $cache_tags = Cache::mergeTags($cache_tags, $shortcut->getCacheTags());
     }
   }
 
   if (!empty($links)) {
-    $shortcut_links = array(
+    $shortcut_links = [
       '#theme' => 'links__toolbar_shortcuts',
       '#links' => $links,
-      '#attributes' => array(
-        'class' => array('toolbar-menu'),
-      ),
-      '#cache' => array(
+      '#attributes' => [
+        'class' => ['toolbar-menu'],
+      ],
+      '#cache' => [
         'tags' => $cache_tags,
-      ),
-    );
+      ],
+    ];
   }
 
   return $shortcut_links;
@@ -313,15 +313,15 @@ function shortcut_preprocess_page_title(&$variables) {
     // string form, so we can set the default name for the shortcut.
     // Strip HTML tags from the title.
     $name = trim(strip_tags(render($variables['title'])));
-    $query = array(
+    $query = [
       'link' => $link,
       'name' => $name,
-    );
+    ];
 
     $shortcut_set = shortcut_current_displayed_set();
 
     // Check if $link is already a shortcut and set $link_mode accordingly.
-    $shortcuts = \Drupal::entityManager()->getStorage('shortcut')->loadByProperties(array('shortcut_set' => $shortcut_set->id()));
+    $shortcuts = \Drupal::entityManager()->getStorage('shortcut')->loadByProperties(['shortcut_set' => $shortcut_set->id()]);
     /** @var \Drupal\shortcut\ShortcutInterface $shortcut */
     foreach ($shortcuts as $shortcut) {
       if (($shortcut_url = $shortcut->getUrl()) && $shortcut_url->isRouted() && $shortcut_url->getRouteName() == $route_match->getRouteName() && $shortcut_url->getRouteParameters() == $route_match->getRawParameters()->all()) {
@@ -332,36 +332,36 @@ function shortcut_preprocess_page_title(&$variables) {
     $link_mode = isset($shortcut_id) ? "remove" : "add";
 
     if ($link_mode == "add") {
-      $link_text = shortcut_set_switch_access()->isAllowed() ? t('Add to %shortcut_set shortcuts', array('%shortcut_set' => $shortcut_set->label())) : t('Add to shortcuts');
+      $link_text = shortcut_set_switch_access()->isAllowed() ? t('Add to %shortcut_set shortcuts', ['%shortcut_set' => $shortcut_set->label()]) : t('Add to shortcuts');
       $route_name = 'shortcut.link_add_inline';
-      $route_parameters = array('shortcut_set' => $shortcut_set->id());
+      $route_parameters = ['shortcut_set' => $shortcut_set->id()];
     }
     else {
       $query['id'] = $shortcut_id;
-      $link_text = shortcut_set_switch_access()->isAllowed() ? t('Remove from %shortcut_set shortcuts', array('%shortcut_set' => $shortcut_set->label())) : t('Remove from shortcuts');
+      $link_text = shortcut_set_switch_access()->isAllowed() ? t('Remove from %shortcut_set shortcuts', ['%shortcut_set' => $shortcut_set->label()]) : t('Remove from shortcuts');
       $route_name = 'entity.shortcut.link_delete_inline';
-      $route_parameters = array('shortcut' => $shortcut_id);
+      $route_parameters = ['shortcut' => $shortcut_id];
     }
 
     if (theme_get_setting('third_party_settings.shortcut.module_link')) {
       $query += \Drupal::destination()->getAsArray();
-      $variables['title_suffix']['add_or_remove_shortcut'] = array(
-        '#attached' => array(
-          'library' => array(
+      $variables['title_suffix']['add_or_remove_shortcut'] = [
+        '#attached' => [
+          'library' => [
             'shortcut/drupal.shortcut',
-          ),
-        ),
+          ],
+        ],
         '#type' => 'link',
-        '#title' => SafeMarkup::format('<span class="shortcut-action__icon"></span><span class="shortcut-action__message">@text</span>', array('@text' => $link_text)),
+        '#title' => SafeMarkup::format('<span class="shortcut-action__icon"></span><span class="shortcut-action__message">@text</span>', ['@text' => $link_text]),
         '#url' => Url::fromRoute($route_name, $route_parameters),
-        '#options' => array('query' => $query),
-        '#attributes' => array(
-          'class' => array(
+        '#options' => ['query' => $query],
+        '#attributes' => [
+          'class' => [
             'shortcut-action',
             'shortcut-action--' . $link_mode,
-          ),
-        ),
-      );
+          ],
+        ],
+      ];
     }
   }
 }
@@ -390,37 +390,37 @@ function shortcut_toolbar() {
     \Drupal::service('renderer')->addCacheableDependency($items['shortcuts'], $shortcut_set);
     $configure_link = NULL;
     if (shortcut_set_edit_access($shortcut_set)->isAllowed()) {
-      $configure_link = array(
+      $configure_link = [
         '#type' => 'link',
         '#title' => t('Edit shortcuts'),
         '#url' => Url::fromRoute('entity.shortcut_set.customize_form', ['shortcut_set' => $shortcut_set->id()]),
-        '#options' => array('attributes' => array('class' => array('edit-shortcuts'))),
-      );
+        '#options' => ['attributes' => ['class' => ['edit-shortcuts']]],
+      ];
     }
     if (!empty($links) || !empty($configure_link)) {
-      $items['shortcuts'] += array(
+      $items['shortcuts'] += [
         '#type' => 'toolbar_item',
-        'tab' => array(
+        'tab' => [
           '#type' => 'link',
           '#title' => t('Shortcuts'),
           '#url' => $shortcut_set->urlInfo('collection'),
-          '#attributes' => array(
+          '#attributes' => [
             'title' => t('Shortcuts'),
-            'class' => array('toolbar-icon', 'toolbar-icon-shortcut'),
-          ),
-        ),
-        'tray' => array(
+            'class' => ['toolbar-icon', 'toolbar-icon-shortcut'],
+          ],
+        ],
+        'tray' => [
           '#heading' => t('User-defined shortcuts'),
           'shortcuts' => $links,
           'configure' => $configure_link,
-        ),
+        ],
         '#weight' => -10,
-        '#attached' => array(
-          'library' => array(
+        '#attached' => [
+          'library' => [
             'shortcut/drupal.shortcut',
-          ),
-        ),
-      );
+          ],
+        ],
+      ];
     }
   }
 
diff --git a/core/modules/shortcut/src/Controller/ShortcutController.php b/core/modules/shortcut/src/Controller/ShortcutController.php
index ff0e184c91c0975cf862647d6b792b8d226929b1..4f33b0b555737fb5b15545047313e624e577f76d 100644
--- a/core/modules/shortcut/src/Controller/ShortcutController.php
+++ b/core/modules/shortcut/src/Controller/ShortcutController.php
@@ -21,7 +21,7 @@ class ShortcutController extends ControllerBase {
    *   The shortcut add form.
    */
   public function addForm(ShortcutSetInterface $shortcut_set) {
-    $shortcut = $this->entityManager()->getStorage('shortcut')->create(array('shortcut_set' => $shortcut_set->id()));
+    $shortcut = $this->entityManager()->getStorage('shortcut')->create(['shortcut_set' => $shortcut_set->id()]);
     return $this->entityFormBuilder()->getForm($shortcut, 'add');
   }
 
@@ -40,10 +40,10 @@ public function deleteShortcutLinkInline(ShortcutInterface $shortcut) {
 
     try {
       $shortcut->delete();
-      drupal_set_message($this->t('The shortcut %title has been deleted.', array('%title' => $label)));
+      drupal_set_message($this->t('The shortcut %title has been deleted.', ['%title' => $label]));
     }
     catch (\Exception $e) {
-      drupal_set_message($this->t('Unable to delete the shortcut for %title.', array('%title' => $label)), 'error');
+      drupal_set_message($this->t('Unable to delete the shortcut for %title.', ['%title' => $label]), 'error');
     }
 
     return $this->redirect('<front>');
diff --git a/core/modules/shortcut/src/Controller/ShortcutSetController.php b/core/modules/shortcut/src/Controller/ShortcutSetController.php
index 8d84f9abe3c61e65d2e9b14998718887e52601f1..58a68d70e0d4c2a557d68b516d2817de5f56752a 100644
--- a/core/modules/shortcut/src/Controller/ShortcutSetController.php
+++ b/core/modules/shortcut/src/Controller/ShortcutSetController.php
@@ -55,20 +55,20 @@ public function addShortcutLinkInline(ShortcutSetInterface $shortcut_set, Reques
     $link = $request->query->get('link');
     $name = $request->query->get('name');
     if (parse_url($link, PHP_URL_SCHEME) === NULL && $this->pathValidator->isValid($link)) {
-      $shortcut = $this->entityManager()->getStorage('shortcut')->create(array(
+      $shortcut = $this->entityManager()->getStorage('shortcut')->create([
         'title' => $name,
         'shortcut_set' => $shortcut_set->id(),
-        'link' => array(
+        'link' => [
           'uri' => 'internal:/' . $link,
-        ),
-      ));
+        ],
+      ]);
 
       try {
         $shortcut->save();
-        drupal_set_message($this->t('Added a shortcut for %title.', array('%title' => $shortcut->label())));
+        drupal_set_message($this->t('Added a shortcut for %title.', ['%title' => $shortcut->label()]));
       }
       catch (\Exception $e) {
-        drupal_set_message($this->t('Unable to add a shortcut for %title.', array('%title' => $shortcut->label())), 'error');
+        drupal_set_message($this->t('Unable to add a shortcut for %title.', ['%title' => $shortcut->label()]), 'error');
       }
 
       return $this->redirect('<front>');
diff --git a/core/modules/shortcut/src/Entity/Shortcut.php b/core/modules/shortcut/src/Entity/Shortcut.php
index 6ddaf05374651aff4c96df998a87c78089b9f1fa..87e2ccb91b08a343a60e0cb262f89e901fc8ef36 100644
--- a/core/modules/shortcut/src/Entity/Shortcut.php
+++ b/core/modules/shortcut/src/Entity/Shortcut.php
@@ -123,13 +123,13 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setRequired(TRUE)
       ->setTranslatable(TRUE)
       ->setSetting('max_length', 255)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -10,
-        'settings' => array(
+        'settings' => [
           'size' => 40,
-        ),
-      ));
+        ],
+      ]);
 
     $fields['weight'] = BaseFieldDefinition::create('integer')
       ->setLabel(t('Weight'))
@@ -139,14 +139,14 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('Path'))
       ->setDescription(t('The location this shortcut points to.'))
       ->setRequired(TRUE)
-      ->setSettings(array(
+      ->setSettings([
         'link_type' => LinkItemInterface::LINK_INTERNAL,
         'title' => DRUPAL_DISABLED,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'link_default',
         'weight' => 0,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     return $fields;
diff --git a/core/modules/shortcut/src/Entity/ShortcutSet.php b/core/modules/shortcut/src/Entity/ShortcutSet.php
index 7b42310e5b656d3de0a47ba0974d3b28695c311c..3d3815db7922f172b66b7e6c6e6deb764111dbae 100644
--- a/core/modules/shortcut/src/Entity/ShortcutSet.php
+++ b/core/modules/shortcut/src/Entity/ShortcutSet.php
@@ -116,8 +116,8 @@ public function resetLinkWeights() {
    * {@inheritdoc}
    */
   public function getShortcuts() {
-    $shortcuts = \Drupal::entityManager()->getStorage('shortcut')->loadByProperties(array('shortcut_set' => $this->id()));
-    uasort($shortcuts, array('\Drupal\shortcut\Entity\Shortcut', 'sort'));
+    $shortcuts = \Drupal::entityManager()->getStorage('shortcut')->loadByProperties(['shortcut_set' => $this->id()]);
+    uasort($shortcuts, ['\Drupal\shortcut\Entity\Shortcut', 'sort']);
     return $shortcuts;
   }
 
diff --git a/core/modules/shortcut/src/Form/SetCustomize.php b/core/modules/shortcut/src/Form/SetCustomize.php
index 89e5123207082f2c8f402acec0254fc592fbbaab..6c97577829365240f8da14f8223e4fca1f8fc07d 100644
--- a/core/modules/shortcut/src/Form/SetCustomize.php
+++ b/core/modules/shortcut/src/Form/SetCustomize.php
@@ -23,24 +23,24 @@ class SetCustomize extends EntityForm {
    */
   public function form(array $form, FormStateInterface $form_state) {
     $form = parent::form($form, $form_state);
-    $form['shortcuts'] = array(
+    $form['shortcuts'] = [
       '#tree' => TRUE,
       '#weight' => -20,
-    );
+    ];
 
-    $form['shortcuts']['links'] = array(
+    $form['shortcuts']['links'] = [
       '#type' => 'table',
-      '#header' => array(t('Name'), t('Weight'), t('Operations')),
-      '#empty' => $this->t('No shortcuts available. <a href=":link">Add a shortcut</a>', array(':link' => $this->url('shortcut.link_add', array('shortcut_set' => $this->entity->id())))),
-      '#attributes' => array('id' => 'shortcuts'),
-      '#tabledrag' => array(
-        array(
+      '#header' => [t('Name'), t('Weight'), t('Operations')],
+      '#empty' => $this->t('No shortcuts available. <a href=":link">Add a shortcut</a>', [':link' => $this->url('shortcut.link_add', ['shortcut_set' => $this->entity->id()])]),
+      '#attributes' => ['id' => 'shortcuts'],
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'shortcut-weight',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     foreach ($this->entity->getShortcuts() as $shortcut) {
       $id = $shortcut->id();
@@ -49,33 +49,33 @@ public function form(array $form, FormStateInterface $form_state) {
         continue;
       }
       $form['shortcuts']['links'][$id]['#attributes']['class'][] = 'draggable';
-      $form['shortcuts']['links'][$id]['name'] = array(
+      $form['shortcuts']['links'][$id]['name'] = [
         '#type' => 'link',
         '#title' => $shortcut->getTitle(),
-      ) + $url->toRenderArray();
+      ] + $url->toRenderArray();
       unset($form['shortcuts']['links'][$id]['name']['#access_callback']);
       $form['shortcuts']['links'][$id]['#weight'] = $shortcut->getWeight();
-      $form['shortcuts']['links'][$id]['weight'] = array(
+      $form['shortcuts']['links'][$id]['weight'] = [
         '#type' => 'weight',
-        '#title' => t('Weight for @title', array('@title' => $shortcut->getTitle())),
+        '#title' => t('Weight for @title', ['@title' => $shortcut->getTitle()]),
         '#title_display' => 'invisible',
         '#default_value' => $shortcut->getWeight(),
-        '#attributes' => array('class' => array('shortcut-weight')),
-      );
+        '#attributes' => ['class' => ['shortcut-weight']],
+      ];
 
-      $links['edit'] = array(
+      $links['edit'] = [
         'title' => t('Edit'),
         'url' => $shortcut->urlInfo(),
-      );
-      $links['delete'] = array(
+      ];
+      $links['delete'] = [
         'title' => t('Delete'),
         'url' => $shortcut->urlInfo('delete-form'),
-      );
-      $form['shortcuts']['links'][$id]['operations'] = array(
+      ];
+      $form['shortcuts']['links'][$id]['operations'] = [
         '#type' => 'operations',
         '#links' => $links,
         '#access' => $url->access(),
-      );
+      ];
     }
     return $form;
   }
@@ -85,14 +85,14 @@ public function form(array $form, FormStateInterface $form_state) {
    */
   protected function actions(array $form, FormStateInterface $form_state) {
     // Only includes a Save action for the entity, no direct Delete button.
-    return array(
-      'submit' => array(
+    return [
+      'submit' => [
         '#type' => 'submit',
         '#value' => t('Save'),
         '#access' => (bool) Element::getVisibleChildren($form['shortcuts']['links']),
-        '#submit' => array('::submitForm', '::save'),
-      ),
-    );
+        '#submit' => ['::submitForm', '::save'],
+      ],
+    ];
   }
 
   /**
@@ -100,7 +100,7 @@ protected function actions(array $form, FormStateInterface $form_state) {
    */
   public function save(array $form, FormStateInterface $form_state) {
     foreach ($this->entity->getShortcuts() as $shortcut) {
-      $weight = $form_state->getValue(array('shortcuts', 'links', $shortcut->id(), 'weight'));
+      $weight = $form_state->getValue(['shortcuts', 'links', $shortcut->id(), 'weight']);
       $shortcut->setWeight($weight);
       $shortcut->save();
     }
diff --git a/core/modules/shortcut/src/Form/ShortcutDeleteForm.php b/core/modules/shortcut/src/Form/ShortcutDeleteForm.php
index aee67880182448daa28e171e8a16f65c4b1a6249..fcabeec7ec2aebd24530a3a63785992d91184907 100644
--- a/core/modules/shortcut/src/Form/ShortcutDeleteForm.php
+++ b/core/modules/shortcut/src/Form/ShortcutDeleteForm.php
@@ -21,9 +21,9 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getCancelUrl() {
-    return new Url('entity.shortcut_set.customize_form', array(
+    return new Url('entity.shortcut_set.customize_form', [
       'shortcut_set' => $this->entity->bundle(),
-    ));
+    ]);
   }
 
   /**
diff --git a/core/modules/shortcut/src/Form/ShortcutSetDeleteForm.php b/core/modules/shortcut/src/Form/ShortcutSetDeleteForm.php
index 3c732d6bc8cddf0511d1930651451eb6c7ed0cb2..c383627b878ccd9b108722df55ed6472baea9f73 100644
--- a/core/modules/shortcut/src/Form/ShortcutSetDeleteForm.php
+++ b/core/modules/shortcut/src/Form/ShortcutSetDeleteForm.php
@@ -65,9 +65,9 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       $info .= '<p>' . t('If you have chosen this shortcut set as the default for some or all users, they may also be affected by deleting it.') . '</p>';
     }
 
-    $form['info'] = array(
+    $form['info'] = [
       '#markup' => $info,
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/shortcut/src/Form/SwitchShortcutSet.php b/core/modules/shortcut/src/Form/SwitchShortcutSet.php
index 220f49b9f350b093c417812c43214f3a6b79e946..649cef765b7279aef4c9f7cb518554f07c66ef4b 100644
--- a/core/modules/shortcut/src/Form/SwitchShortcutSet.php
+++ b/core/modules/shortcut/src/Form/SwitchShortcutSet.php
@@ -77,60 +77,60 @@ public function buildForm(array $form, FormStateInterface $form_state, UserInter
 
     $account_is_user = $this->user->id() == $account->id();
     if (count($options) > 1) {
-      $form['set'] = array(
+      $form['set'] = [
         '#type' => 'radios',
         '#title' => $account_is_user ? $this->t('Choose a set of shortcuts to use') : $this->t('Choose a set of shortcuts for this user'),
         '#options' => $options,
         '#default_value' => $current_set->id(),
-      );
+      ];
 
-      $form['label'] = array(
+      $form['label'] = [
         '#type' => 'textfield',
         '#title' => $this->t('Label'),
         '#description' => $this->t('The new set is created by copying items from your default shortcut set.'),
         '#access' => $add_access,
-        '#states' => array(
-          'visible' => array(
-            ':input[name="set"]' => array('value' => 'new'),
-          ),
-          'required' => array(
-            ':input[name="set"]' => array('value' => 'new'),
-          ),
-        ),
-      );
-      $form['id'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="set"]' => ['value' => 'new'],
+          ],
+          'required' => [
+            ':input[name="set"]' => ['value' => 'new'],
+          ],
+        ],
+      ];
+      $form['id'] = [
         '#type' => 'machine_name',
-        '#machine_name' => array(
-          'exists' => array($this, 'exists'),
+        '#machine_name' => [
+          'exists' => [$this, 'exists'],
           'replace_pattern' => '[^a-z0-9-]+',
           'replace' => '-',
-        ),
+        ],
         // This ID could be used for menu name.
         '#maxlength' => 23,
-        '#states' => array(
-          'required' => array(
-            ':input[name="set"]' => array('value' => 'new'),
-          ),
-        ),
+        '#states' => [
+          'required' => [
+            ':input[name="set"]' => ['value' => 'new'],
+          ],
+        ],
         '#required' => FALSE,
-      );
+      ];
 
       if (!$account_is_user) {
         $default_set = $this->shortcutSetStorage->getDefaultSet($this->user);
-        $form['new']['#description'] = $this->t('The new set is created by copying items from the %default set.', array('%default' => $default_set->label()));
+        $form['new']['#description'] = $this->t('The new set is created by copying items from the %default set.', ['%default' => $default_set->label()]);
       }
 
-      $form['actions'] = array('#type' => 'actions');
-      $form['actions']['submit'] = array(
+      $form['actions'] = ['#type' => 'actions'];
+      $form['actions']['submit'] = [
         '#type' => 'submit',
         '#value' => $this->t('Change set'),
-      );
+      ];
     }
     else {
       // There is only 1 option, so output a message in the $form array.
-      $form['info'] = array(
-        '#markup' => '<p>' . $this->t('You are currently using the %set-name shortcut set.', array('%set-name' => $current_set->label())) . '</p>',
-      );
+      $form['info'] = [
+        '#markup' => '<p>' . $this->t('You are currently using the %set-name shortcut set.', ['%set-name' => $current_set->label()]) . '</p>',
+      ];
     }
 
     return $form;
@@ -173,16 +173,16 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if ($form_state->getValue('set') == 'new') {
       // Save a new shortcut set with links copied from the user's default set.
       /* @var \Drupal\shortcut\Entity\ShortcutSet $set */
-      $set = $this->shortcutSetStorage->create(array(
+      $set = $this->shortcutSetStorage->create([
         'id' => $form_state->getValue('id'),
         'label' => $form_state->getValue('label'),
-      ));
+      ]);
       $set->save();
-      $replacements = array(
+      $replacements = [
         '%user' => $this->user->label(),
         '%set_name' => $set->label(),
         ':switch-url' => $this->url('<current>'),
-      );
+      ];
       if ($account_is_user) {
         // Only administrators can create new shortcut sets, so we know they have
         // access to switch back.
@@ -193,17 +193,17 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       }
       $form_state->setRedirect(
         'entity.shortcut_set.customize_form',
-        array('shortcut_set' => $set->id())
+        ['shortcut_set' => $set->id()]
       );
     }
     else {
       // Switch to a different shortcut set.
       /* @var \Drupal\shortcut\Entity\ShortcutSet $set */
       $set = $this->shortcutSetStorage->load($form_state->getValue('set'));
-      $replacements = array(
+      $replacements = [
         '%user' => $this->user->getDisplayName(),
         '%set_name' => $set->label(),
-      );
+      ];
       drupal_set_message($account_is_user ? $this->t('You are now using the %set_name shortcut set.', $replacements) : $this->t('%user is now using the %set_name shortcut set.', $replacements));
     }
 
diff --git a/core/modules/shortcut/src/Plugin/Block/ShortcutsBlock.php b/core/modules/shortcut/src/Plugin/Block/ShortcutsBlock.php
index 1678f6aaea51c61114b851593790d35e46bb49fb..ab2d57e414db0f343298bc94d5b90c2515f3259b 100644
--- a/core/modules/shortcut/src/Plugin/Block/ShortcutsBlock.php
+++ b/core/modules/shortcut/src/Plugin/Block/ShortcutsBlock.php
@@ -21,9 +21,9 @@ class ShortcutsBlock extends BlockBase {
    * {@inheritdoc}
    */
   public function build() {
-    return array(
+    return [
       shortcut_renderable_links(shortcut_current_displayed_set()),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/shortcut/src/Plugin/migrate/destination/ShortcutSetUsers.php b/core/modules/shortcut/src/Plugin/migrate/destination/ShortcutSetUsers.php
index cd86f0f5e1b503b96c3197463baafeb9005f3723..0cb843be76ca4fb7ecc7a33afc62963c4dbd9a91 100644
--- a/core/modules/shortcut/src/Plugin/migrate/destination/ShortcutSetUsers.php
+++ b/core/modules/shortcut/src/Plugin/migrate/destination/ShortcutSetUsers.php
@@ -60,14 +60,14 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'set_name' => array(
+    return [
+      'set_name' => [
         'type' => 'string',
-      ),
-      'uid' => array(
+      ],
+      'uid' => [
         'type' => 'integer',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -83,14 +83,14 @@ public function fields(MigrationInterface $migration = NULL) {
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     /** @var \Drupal\shortcut\ShortcutSetInterface $set */
     $set = $this->shortcutSetStorage->load($row->getDestinationProperty('set_name'));
     /** @var \Drupal\user\UserInterface $account */
     $account = User::load($row->getDestinationProperty('uid'));
     $this->shortcutSetStorage->assignUser($set, $account);
 
-    return array($set->id(), $account->id());
+    return [$set->id(), $account->id()];
   }
 
 }
diff --git a/core/modules/shortcut/src/Plugin/migrate/source/d7/Shortcut.php b/core/modules/shortcut/src/Plugin/migrate/source/d7/Shortcut.php
index c964e5c46f6c8cd4071ca65ce2bb806b411ae5d2..444c38feb921c1e79c39b2822620a993c349c282 100644
--- a/core/modules/shortcut/src/Plugin/migrate/source/d7/Shortcut.php
+++ b/core/modules/shortcut/src/Plugin/migrate/source/d7/Shortcut.php
@@ -19,7 +19,7 @@ class Shortcut extends DrupalSqlBase {
    */
   public function query() {
     return $this->select('menu_links', 'ml')
-      ->fields('ml', array('mlid', 'menu_name', 'link_path', 'link_title', 'weight'))
+      ->fields('ml', ['mlid', 'menu_name', 'link_path', 'link_title', 'weight'])
       ->condition('hidden', '0')
       ->condition('menu_name', 'shortcut-set-%', 'LIKE')
       ->orderBy('ml.mlid');
@@ -29,13 +29,13 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'mlid' => $this->t("The menu.mlid primary key for this menu item (= shortcut link)."),
       'menu_name' => $this->t("The menu_name (= set name) for this shortcut link."),
       'link_path' => $this->t("The link for this shortcut."),
       'link_title' => $this->t("The title for this shortcut."),
       'weight' => $this->t("The weight for this shortcut"),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/shortcut/src/Plugin/migrate/source/d7/ShortcutSet.php b/core/modules/shortcut/src/Plugin/migrate/source/d7/ShortcutSet.php
index 75f145433f3b69a52f7241d73f4c046573917279..a088ca8efb18cda2badbb64580c218fa140c2814 100644
--- a/core/modules/shortcut/src/Plugin/migrate/source/d7/ShortcutSet.php
+++ b/core/modules/shortcut/src/Plugin/migrate/source/d7/ShortcutSet.php
@@ -25,10 +25,10 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'set_name' => $this->t("The name under which the set's links are stored."),
       'title' => $this->t("The title of the set."),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/shortcut/src/Plugin/migrate/source/d7/ShortcutSetUsers.php b/core/modules/shortcut/src/Plugin/migrate/source/d7/ShortcutSetUsers.php
index dd5a13fc8cfa9d7add8664c03196281ce152180c..b86dccde1686616d370566666310437cfb39d42b 100644
--- a/core/modules/shortcut/src/Plugin/migrate/source/d7/ShortcutSetUsers.php
+++ b/core/modules/shortcut/src/Plugin/migrate/source/d7/ShortcutSetUsers.php
@@ -25,24 +25,24 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'uid' => $this->t('The users.uid for this set.'),
       'set_name' => $this->t('The shortcut_set.set_name that will be displayed for this user.'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'set_name' => array(
+    return [
+      'set_name' => [
         'type' => 'string',
-      ),
-      'uid' => array(
+      ],
+      'uid' => [
         'type' => 'integer',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/shortcut/src/ShortcutForm.php b/core/modules/shortcut/src/ShortcutForm.php
index b87db1bce89ae4418c026952d360730473d41621..bfe3133e47d07d8a3d62e7f46044d662059e31b1 100644
--- a/core/modules/shortcut/src/ShortcutForm.php
+++ b/core/modules/shortcut/src/ShortcutForm.php
@@ -35,16 +35,16 @@ public function save(array $form, FormStateInterface $form_state) {
     }
 
     if ($status == SAVED_UPDATED) {
-      $message = $this->t('The shortcut %link has been updated.', array('%link' => $view_link));
+      $message = $this->t('The shortcut %link has been updated.', ['%link' => $view_link]);
     }
     else {
-      $message = $this->t('Added a shortcut for %title.', array('%title' => $view_link));
+      $message = $this->t('Added a shortcut for %title.', ['%title' => $view_link]);
     }
     drupal_set_message($message);
 
     $form_state->setRedirect(
       'entity.shortcut_set.customize_form',
-      array('shortcut_set' => $entity->bundle())
+      ['shortcut_set' => $entity->bundle()]
     );
   }
 
diff --git a/core/modules/shortcut/src/ShortcutSetForm.php b/core/modules/shortcut/src/ShortcutSetForm.php
index 012de5fa6f67eb9c20e96ea383d5e45fb5c8a566..721d2517d417d113c4e2d4ab0b5dd7720b5773ea 100644
--- a/core/modules/shortcut/src/ShortcutSetForm.php
+++ b/core/modules/shortcut/src/ShortcutSetForm.php
@@ -17,25 +17,25 @@ public function form(array $form, FormStateInterface $form_state) {
     $form = parent::form($form, $form_state);
 
     $entity = $this->entity;
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => t('Set name'),
       '#description' => t('The new set is created by copying items from your default shortcut set.'),
       '#required' => TRUE,
       '#default_value' => $entity->label(),
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => '\Drupal\shortcut\Entity\ShortcutSet::load',
-        'source' => array('label'),
+        'source' => ['label'],
         'replace_pattern' => '[^a-z0-9-]+',
         'replace' => '-',
-      ),
+      ],
       '#default_value' => $entity->id(),
       // This id could be used for menu name.
       '#maxlength' => 23,
-    );
+    ];
 
     $form['actions']['submit']['#value'] = t('Create new set');
 
@@ -51,10 +51,10 @@ public function save(array $form, FormStateInterface $form_state) {
     $entity->save();
 
     if ($is_new) {
-      drupal_set_message(t('The %set_name shortcut set has been created. You can edit it from this page.', array('%set_name' => $entity->label())));
+      drupal_set_message(t('The %set_name shortcut set has been created. You can edit it from this page.', ['%set_name' => $entity->label()]));
     }
     else {
-      drupal_set_message(t('Updated set name to %set-name.', array('%set-name' => $entity->label())));
+      drupal_set_message(t('Updated set name to %set-name.', ['%set-name' => $entity->label()]));
     }
     $form_state->setRedirectUrl($this->entity->urlInfo('customize-form'));
   }
diff --git a/core/modules/shortcut/src/ShortcutSetListBuilder.php b/core/modules/shortcut/src/ShortcutSetListBuilder.php
index 0e5d81d8b098b3ddf07f855291dabef02c3d8b9b..2cc582e944578d57b92161cb4ef8a0c6320f48d1 100644
--- a/core/modules/shortcut/src/ShortcutSetListBuilder.php
+++ b/core/modules/shortcut/src/ShortcutSetListBuilder.php
@@ -30,10 +30,10 @@ public function getDefaultOperations(EntityInterface $entity) {
       $operations['edit']['title'] = t('Edit shortcut set');
     }
 
-    $operations['list'] = array(
+    $operations['list'] = [
       'title' => t('List links'),
       'url' => $entity->urlInfo('customize-form'),
-    );
+    ];
     return $operations;
   }
 
diff --git a/core/modules/shortcut/src/ShortcutSetStorage.php b/core/modules/shortcut/src/ShortcutSetStorage.php
index d76c0c46c1efa2cb077934484ea047e3fed46f6e..b136c2fb07dbf6f8b4d2437f4c925bb2115ecb65 100644
--- a/core/modules/shortcut/src/ShortcutSetStorage.php
+++ b/core/modules/shortcut/src/ShortcutSetStorage.php
@@ -73,7 +73,7 @@ public function deleteAssignedShortcutSets(ShortcutSetInterface $entity) {
   public function assignUser(ShortcutSetInterface $shortcut_set, $account) {
     db_merge('shortcut_set_users')
       ->key('uid', $account->id())
-      ->fields(array('set_name' => $shortcut_set->id()))
+      ->fields(['set_name' => $shortcut_set->id()])
       ->execute();
     drupal_static_reset('shortcut_current_displayed_set');
   }
@@ -93,7 +93,7 @@ public function unassignUser($account) {
    */
   public function getAssignedToUser($account) {
     $query = db_select('shortcut_set_users', 'ssu');
-    $query->fields('ssu', array('set_name'));
+    $query->fields('ssu', ['set_name']);
     $query->condition('ssu.uid', $account->id());
     return $query->execute()->fetchField();
   }
@@ -102,7 +102,7 @@ public function getAssignedToUser($account) {
    * {@inheritdoc}
    */
   public function countAssignedUsers(ShortcutSetInterface $shortcut_set) {
-    return db_query('SELECT COUNT(*) FROM {shortcut_set_users} WHERE set_name = :name', array(':name' => $shortcut_set->id()))->fetchField();
+    return db_query('SELECT COUNT(*) FROM {shortcut_set_users} WHERE set_name = :name', [':name' => $shortcut_set->id()])->fetchField();
   }
 
   /**
@@ -113,7 +113,7 @@ public function getDefaultSet(AccountInterface $account) {
     // have one, we allow the last module which returns a valid result to take
     // precedence. If no module returns a valid set, fall back on the site-wide
     // default, which is the lowest-numbered shortcut set.
-    $suggestions = array_reverse($this->moduleHandler->invokeAll('shortcut_default_set', array($account)));
+    $suggestions = array_reverse($this->moduleHandler->invokeAll('shortcut_default_set', [$account]));
     $suggestions[] = 'default';
     $shortcut_set = NULL;
     foreach ($suggestions as $name) {
diff --git a/core/modules/shortcut/src/Tests/ShortcutLinksTest.php b/core/modules/shortcut/src/Tests/ShortcutLinksTest.php
index 679f89bbecdc338ce2e9bb2ce63bb1318ef325c1..cf4ae0fbe5b3ca006ae13cd4670d876151508dbd 100644
--- a/core/modules/shortcut/src/Tests/ShortcutLinksTest.php
+++ b/core/modules/shortcut/src/Tests/ShortcutLinksTest.php
@@ -22,7 +22,7 @@ class ShortcutLinksTest extends ShortcutTestBase {
    *
    * @var array
    */
-  public static $modules = array('router_test', 'views', 'block');
+  public static $modules = ['router_test', 'views', 'block'];
 
   /**
    * {@inheritdoc}
@@ -40,10 +40,10 @@ public function testShortcutLinkAdd() {
     $set = $this->set;
 
     // Create an alias for the node so we can test aliases.
-    $path = array(
+    $path = [
       'source' => '/node/' . $this->node->id(),
       'alias' => '/' . $this->randomMachineName(8),
-    );
+    ];
     $this->container->get('path.alias_storage')->save($path['source'], $path['alias']);
 
     // Create some paths to test.
@@ -65,13 +65,13 @@ public function testShortcutLinkAdd() {
     // Check that each new shortcut links where it should.
     foreach ($test_cases as $test_path) {
       $title = $this->randomMachineName();
-      $form_data = array(
+      $form_data = [
         'title[0][value]' => $title,
         'link[0][uri]' => $test_path,
-      );
+      ];
       $this->drupalPostForm('admin/config/user-interface/shortcut/manage/' . $set->id() . '/add-link', $form_data, t('Save'));
       $this->assertResponse(200);
-      $this->assertText(t('Added a shortcut for @title.', array('@title' => $title)));
+      $this->assertText(t('Added a shortcut for @title.', ['@title' => $title]));
       $saved_set = ShortcutSet::load($set->id());
       $paths = $this->getShortcutInformation($saved_set, 'link');
       $this->assertTrue(in_array('internal:' . $test_path, $paths), 'Shortcut created: ' . $test_path);
@@ -115,10 +115,10 @@ public function testShortcutLinkAdd() {
 
     // Create a new shortcut set and add a link to it.
     $this->drupalLogin($this->adminUser);
-    $edit = array(
+    $edit = [
       'label' => $this->randomMachineName(),
       'id' => strtolower($this->randomMachineName()),
-    );
+    ];
     $this->drupalPostForm('admin/config/user-interface/shortcut/add-set', $edit, t('Save'));
     $title = $this->randomMachineName();
     $form_data = [
@@ -133,7 +133,7 @@ public function testShortcutLinkAdd() {
    * Tests that the "add to shortcut" and "remove from shortcut" links work.
    */
   public function testShortcutQuickLink() {
-    \Drupal::service('theme_handler')->install(array('seven'));
+    \Drupal::service('theme_handler')->install(['seven']);
     $this->config('system.theme')->set('admin', 'seven')->save();
     $this->config('node.settings')->set('use_admin_theme', '1')->save();
     $this->container->get('router.builder')->rebuild();
@@ -177,7 +177,7 @@ public function testShortcutQuickLink() {
     $this->assertText('Added a shortcut for Create Basic page.');
     // Assure that Article does not have its shortcut indicated as set.
     $this->drupalGet('node/add/article');
-    $link = $this->xpath('//a[normalize-space()=:label]', array(':label' => 'Remove from Default shortcuts'));
+    $link = $this->xpath('//a[normalize-space()=:label]', [':label' => 'Remove from Default shortcuts']);
     $this->assertTrue(empty($link), 'Link Remove to Default shortcuts not found for Create Article page.');
     // Add Shortcut for Article.
     $this->clickLink('Add to Default shortcuts');
@@ -198,11 +198,11 @@ public function testShortcutQuickLink() {
     $this->assertShortcutQuickLink('Add to Default shortcuts');
 
     \Drupal::service('module_installer')->install(['block_content']);
-    BlockContentType::create(array(
+    BlockContentType::create([
       'id' => 'basic',
       'label' => 'Basic block',
       'revision' => FALSE,
-    ))->save();
+    ])->save();
     // Test page with HTML tags in title.
     $this->drupalGet('admin/structure/block/block-content/manage/basic');
     $page_title = new FormattableMarkup('Edit %label custom block type', ['%label' => 'Basic block']);
@@ -226,12 +226,12 @@ public function testShortcutLinkRename() {
 
     $shortcuts = $set->getShortcuts();
     $shortcut = reset($shortcuts);
-    $this->drupalPostForm('admin/config/user-interface/shortcut/link/' . $shortcut->id(), array('title[0][value]' => $new_link_name), t('Save'));
+    $this->drupalPostForm('admin/config/user-interface/shortcut/link/' . $shortcut->id(), ['title[0][value]' => $new_link_name], t('Save'));
     $saved_set = ShortcutSet::load($set->id());
     $titles = $this->getShortcutInformation($saved_set, 'title');
     $this->assertTrue(in_array($new_link_name, $titles), 'Shortcut renamed: ' . $new_link_name);
     $this->assertLink($new_link_name, 0, 'Renamed shortcut link appears on the page.');
-    $this->assertText(t('The shortcut @link has been updated.', array('@link' => $new_link_name)));
+    $this->assertText(t('The shortcut @link has been updated.', ['@link' => $new_link_name]));
   }
 
   /**
@@ -245,12 +245,12 @@ public function testShortcutLinkChangePath() {
 
     $shortcuts = $set->getShortcuts();
     $shortcut = reset($shortcuts);
-    $this->drupalPostForm('admin/config/user-interface/shortcut/link/' . $shortcut->id(), array('title[0][value]' => $shortcut->getTitle(), 'link[0][uri]' => $new_link_path), t('Save'));
+    $this->drupalPostForm('admin/config/user-interface/shortcut/link/' . $shortcut->id(), ['title[0][value]' => $shortcut->getTitle(), 'link[0][uri]' => $new_link_path], t('Save'));
     $saved_set = ShortcutSet::load($set->id());
     $paths = $this->getShortcutInformation($saved_set, 'link');
     $this->assertTrue(in_array('internal:' . $new_link_path, $paths), 'Shortcut path changed: ' . $new_link_path);
     $this->assertLinkByHref($new_link_path, 0, 'Shortcut with new path appears on the page.');
-    $this->assertText(t('The shortcut @link has been updated.', array('@link' => $shortcut->getTitle())));
+    $this->assertText(t('The shortcut @link has been updated.', ['@link' => $shortcut->getTitle()]));
   }
 
   /**
@@ -277,7 +277,7 @@ public function testShortcutLinkDelete() {
 
     $shortcuts = $set->getShortcuts();
     $shortcut = reset($shortcuts);
-    $this->drupalPostForm('admin/config/user-interface/shortcut/link/' . $shortcut->id() . '/delete', array(), 'Delete');
+    $this->drupalPostForm('admin/config/user-interface/shortcut/link/' . $shortcut->id() . '/delete', [], 'Delete');
     $saved_set = ShortcutSet::load($set->id());
     $ids = $this->getShortcutInformation($saved_set, 'id');
     $this->assertFalse(in_array($shortcut->id(), $ids), 'Successfully deleted a shortcut.');
@@ -297,7 +297,7 @@ public function testShortcutLinkDelete() {
    */
   public function testNoShortcutLink() {
     // Change to a theme that displays shortcuts.
-    \Drupal::service('theme_handler')->install(array('seven'));
+    \Drupal::service('theme_handler')->install(['seven']);
     $this->config('system.theme')
       ->set('default', 'seven')
       ->save();
@@ -328,7 +328,7 @@ public function testNoShortcutLink() {
    */
   public function testAccessShortcutsPermission() {
     // Change to a theme that displays shortcuts.
-    \Drupal::service('theme_handler')->install(array('seven'));
+    \Drupal::service('theme_handler')->install(['seven']);
     $this->config('system.theme')
       ->set('default', 'seven')
       ->save();
@@ -340,20 +340,20 @@ public function testAccessShortcutsPermission() {
 
     // Verify that users without the 'access shortcuts' permission can't see the
     // shortcuts.
-    $this->drupalLogin($this->drupalCreateUser(array('access toolbar')));
+    $this->drupalLogin($this->drupalCreateUser(['access toolbar']));
     $this->assertNoLink('Shortcuts', 'Shortcut link not found on page.');
 
     // Verify that users without the 'administer site configuration' permission
     // can't see the cron shortcuts.
-    $this->drupalLogin($this->drupalCreateUser(array('access toolbar', 'access shortcuts')));
+    $this->drupalLogin($this->drupalCreateUser(['access toolbar', 'access shortcuts']));
     $this->assertNoLink('Shortcuts', 'Shortcut link not found on page.');
     $this->assertNoLink('Cron', 'Cron shortcut link not found on page.');
 
     // Verify that users with the 'access shortcuts' permission can see the
     // shortcuts.
-    $this->drupalLogin($this->drupalCreateUser(array(
+    $this->drupalLogin($this->drupalCreateUser([
       'access toolbar', 'access shortcuts', 'administer site configuration',
-    )));
+    ]));
     $this->clickLink('Shortcuts', 0, 'Shortcut link found on page.');
     $this->assertLink('Cron', 0, 'Cron shortcut link found on page.');
 
@@ -365,7 +365,7 @@ public function testAccessShortcutsPermission() {
    */
   public function testShortcutLinkOrder() {
     // Ensure to give permissions to access the shortcuts.
-    $this->drupalLogin($this->drupalCreateUser(array('access toolbar', 'access shortcuts', 'access content overview', 'administer content types')));
+    $this->drupalLogin($this->drupalCreateUser(['access toolbar', 'access shortcuts', 'access content overview', 'administer content types']));
     $this->drupalGet(Url::fromRoute('<front>'));
     $shortcuts = $this->cssSelect('#toolbar-item-shortcuts-tray .toolbar-menu a');
     $this->assertEqual((string) $shortcuts[0], 'Add content');
@@ -386,24 +386,24 @@ public function testShortcutLinkOrder() {
   private function verifyAccessShortcutsPermissionForEditPages() {
     // Create a user with customize links and switch sets permissions  but
     // without the 'access shortcuts' permission.
-    $test_permissions = array(
+    $test_permissions = [
       'customize shortcut links',
       'switch shortcut sets',
-    );
+    ];
     $noaccess_user = $this->drupalCreateUser($test_permissions);
     $this->drupalLogin($noaccess_user);
 
     // Verify that set administration pages are inaccessible without the
     // 'access shortcuts' permission.
-    $edit_paths = array(
+    $edit_paths = [
       'admin/config/user-interface/shortcut/manage/default/customize',
       'admin/config/user-interface/shortcut/manage/default',
       'user/' . $noaccess_user->id() . '/shortcuts',
-    );
+    ];
 
     foreach ($edit_paths as $path) {
       $this->drupalGet($path);
-      $message = format_string('Access is denied on %s', array('%s' => $path));
+      $message = format_string('Access is denied on %s', ['%s' => $path]);
       $this->assertResponse(403, $message);
     }
   }
@@ -426,7 +426,7 @@ public function testShortcutBlockAccess() {
 
     // Verify that users without the 'access shortcuts' permission can see the
     // shortcut block.
-    $this->drupalLogin($this->drupalCreateUser(array()));
+    $this->drupalLogin($this->drupalCreateUser([]));
     $this->drupalGet('');
     $this->assertNoBlockAppears($block);
   }
@@ -454,8 +454,8 @@ public function testShortcutBlockAccess() {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertShortcutQuickLink($label, $index = 0, $message = '', $group = 'Other') {
-    $links = $this->xpath('//a[normalize-space()=:label]', array(':label' => $label));
-    $message = ($message ? $message : SafeMarkup::format('Shortcut quick link with label %label found.', array('%label' => $label)));
+    $links = $this->xpath('//a[normalize-space()=:label]', [':label' => $label]);
+    $message = ($message ? $message : SafeMarkup::format('Shortcut quick link with label %label found.', ['%label' => $label]));
     return $this->assert(isset($links[$index]), $message, $group);
   }
 
diff --git a/core/modules/shortcut/src/Tests/ShortcutSetsTest.php b/core/modules/shortcut/src/Tests/ShortcutSetsTest.php
index 3a047573505b166a9b3f180ca2d914d83d69e202..e4c7fb77a165dca446fb146dc3bd2bb0d1b85e05 100644
--- a/core/modules/shortcut/src/Tests/ShortcutSetsTest.php
+++ b/core/modules/shortcut/src/Tests/ShortcutSetsTest.php
@@ -33,10 +33,10 @@ protected function setUp() {
   function testShortcutSetAdd() {
     $this->drupalGet('admin/config/user-interface/shortcut');
     $this->clickLink(t('Add shortcut set'));
-    $edit = array(
+    $edit = [
       'label' => $this->randomMachineName(),
       'id' => strtolower($this->randomMachineName()),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $new_set = $this->container->get('entity.manager')->getStorage('shortcut_set')->load($edit['id']);
     $this->assertIdentical($new_set->id(), $edit['id'], 'Successfully created a shortcut set.');
@@ -66,14 +66,14 @@ function testShortcutSetEdit() {
     $this->assertEqual(count($elements), 3, 'Correct number of table header cells found.');
 
     // Test the contents of each th cell.
-    $expected_items = array(t('Name'), t('Weight'), t('Operations'));
+    $expected_items = [t('Name'), t('Weight'), t('Operations')];
     foreach ($elements as $key => $element) {
       $this->assertEqual((string) $element[0], $expected_items[$key]);
     }
 
     // Look for test shortcuts in the table.
     $weight = count($shortcuts);
-    $edit = array();
+    $edit = [];
     foreach ($shortcuts as $shortcut) {
       $title = $shortcut->getTitle();
 
@@ -105,7 +105,7 @@ function testShortcutSetSwitchOwn() {
 
     // Attempt to switch the default shortcut set to the newly created shortcut
     // set.
-    $this->drupalPostForm('user/' . $this->adminUser->id() . '/shortcuts', array('set' => $new_set->id()), t('Change set'));
+    $this->drupalPostForm('user/' . $this->adminUser->id() . '/shortcuts', ['set' => $new_set->id()], t('Change set'));
     $this->assertResponse(200);
     $current_set = shortcut_current_displayed_set($this->adminUser);
     $this->assertTrue($new_set->id() == $current_set->id(), 'Successfully switched own shortcut set.');
@@ -126,11 +126,11 @@ function testShortcutSetAssign() {
    * Tests switching a user's shortcut set and creating one at the same time.
    */
   function testShortcutSetSwitchCreate() {
-    $edit = array(
+    $edit = [
       'set' => 'new',
       'id' => strtolower($this->randomMachineName()),
       'label' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm('user/' . $this->adminUser->id() . '/shortcuts', $edit, t('Change set'));
     $current_set = shortcut_current_displayed_set($this->adminUser);
     $this->assertNotEqual($current_set->id(), $this->set->id(), 'A shortcut set can be switched to at the same time as it is created.');
@@ -141,7 +141,7 @@ function testShortcutSetSwitchCreate() {
    * Tests switching a user's shortcut set without providing a new set name.
    */
   function testShortcutSetSwitchNoSetName() {
-    $edit = array('set' => 'new');
+    $edit = ['set' => 'new'];
     $this->drupalPostForm('user/' . $this->adminUser->id() . '/shortcuts', $edit, t('Change set'));
     $this->assertText(t('The new set label is required.'));
     $current_set = shortcut_current_displayed_set($this->adminUser);
@@ -158,7 +158,7 @@ function testShortcutSetRename() {
     $new_label = $this->randomMachineName();
     $this->drupalGet('admin/config/user-interface/shortcut');
     $this->clickLink(t('Edit shortcut set'));
-    $this->drupalPostForm(NULL, array('label' => $new_label), t('Save'));
+    $this->drupalPostForm(NULL, ['label' => $new_label], t('Save'));
     $set = ShortcutSet::load($set->id());
     $this->assertTrue($set->label() == $new_label, 'Shortcut set has been successfully renamed.');
   }
@@ -183,7 +183,7 @@ function testShortcutSetUnassign() {
   function testShortcutSetDelete() {
     $new_set = $this->generateShortcutSet($this->randomMachineName());
 
-    $this->drupalPostForm('admin/config/user-interface/shortcut/manage/' . $new_set->id() . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/user-interface/shortcut/manage/' . $new_set->id() . '/delete', [], t('Delete'));
     $sets = ShortcutSet::loadMultiple();
     $this->assertFalse(isset($sets[$new_set->id()]), 'Successfully deleted a shortcut set.');
   }
diff --git a/core/modules/shortcut/src/Tests/ShortcutTestBase.php b/core/modules/shortcut/src/Tests/ShortcutTestBase.php
index b32afb29d53b506756af4aa9a680f6ca442e425f..7fd5a4535d9b519bfb4acb3cc255b7ebb7ba05ad 100644
--- a/core/modules/shortcut/src/Tests/ShortcutTestBase.php
+++ b/core/modules/shortcut/src/Tests/ShortcutTestBase.php
@@ -17,7 +17,7 @@ abstract class ShortcutTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'toolbar', 'shortcut');
+  public static $modules = ['node', 'toolbar', 'shortcut'];
 
   /**
    * User with permission to administer shortcuts.
@@ -52,37 +52,37 @@ protected function setUp() {
 
     if ($this->profile != 'standard') {
       // Create Basic page and Article node types.
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
 
       // Populate the default shortcut set.
-      $shortcut = Shortcut::create(array(
+      $shortcut = Shortcut::create([
         'shortcut_set' => 'default',
         'title' => t('Add content'),
         'weight' => -20,
-        'link' => array(
+        'link' => [
           'uri' => 'internal:/node/add',
-        ),
-      ));
+        ],
+      ]);
       $shortcut->save();
 
-      $shortcut = Shortcut::create(array(
+      $shortcut = Shortcut::create([
         'shortcut_set' => 'default',
         'title' => t('All content'),
         'weight' => -19,
-        'link' => array(
+        'link' => [
           'uri' => 'internal:/admin/content',
-        ),
-      ));
+        ],
+      ]);
       $shortcut->save();
     }
 
     // Create users.
-    $this->adminUser = $this->drupalCreateUser(array('access toolbar', 'administer shortcuts', 'view the administration theme', 'create article content', 'create page content', 'access content overview', 'administer users', 'link to any page', 'edit any article content'));
-    $this->shortcutUser = $this->drupalCreateUser(array('customize shortcut links', 'switch shortcut sets', 'access shortcuts', 'access content'));
+    $this->adminUser = $this->drupalCreateUser(['access toolbar', 'administer shortcuts', 'view the administration theme', 'create article content', 'create page content', 'access content overview', 'administer users', 'link to any page', 'edit any article content']);
+    $this->shortcutUser = $this->drupalCreateUser(['customize shortcut links', 'switch shortcut sets', 'access shortcuts', 'access content']);
 
     // Create a node.
-    $this->node = $this->drupalCreateNode(array('type' => 'article'));
+    $this->node = $this->drupalCreateNode(['type' => 'article']);
 
     // Log in as admin and grab the default shortcut set.
     $this->drupalLogin($this->adminUser);
@@ -94,10 +94,10 @@ protected function setUp() {
    * Creates a generic shortcut set.
    */
   function generateShortcutSet($label = '', $id = NULL) {
-    $set = ShortcutSet::create(array(
+    $set = ShortcutSet::create([
       'id' => isset($id) ? $id : strtolower($this->randomMachineName()),
       'label' => empty($label) ? $this->randomString() : $label,
-    ));
+    ]);
     $set->save();
     return $set;
   }
@@ -117,7 +117,7 @@ function generateShortcutSet($label = '', $id = NULL) {
    *   Array of the requested information from each link.
    */
   function getShortcutInformation(ShortcutSetInterface $set, $key) {
-    $info = array();
+    $info = [];
     \Drupal::entityManager()->getStorage('shortcut')->resetCache();
     foreach ($set->getShortcuts() as $shortcut) {
       if ($key == 'link') {
diff --git a/core/modules/shortcut/src/Tests/ShortcutTranslationUITest.php b/core/modules/shortcut/src/Tests/ShortcutTranslationUITest.php
index 4be41c36dcba202374b30d8620b474b9e26d24a7..300ca3b7220872b525748df31b3598affd25f929 100644
--- a/core/modules/shortcut/src/Tests/ShortcutTranslationUITest.php
+++ b/core/modules/shortcut/src/Tests/ShortcutTranslationUITest.php
@@ -23,13 +23,13 @@ class ShortcutTranslationUITest extends ContentTranslationUITestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'language',
     'content_translation',
     'link',
     'shortcut',
     'toolbar'
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -44,7 +44,7 @@ protected function setUp() {
    * {@inheritdoc}
    */
   protected function getTranslatorPermissions() {
-    return array_merge(parent::getTranslatorPermissions(), array('access shortcuts', 'administer shortcuts', 'access toolbar'));
+    return array_merge(parent::getTranslatorPermissions(), ['access shortcuts', 'administer shortcuts', 'access toolbar']);
   }
 
   /**
@@ -59,7 +59,7 @@ protected function createEntity($values, $langcode, $bundle_name = NULL) {
    * {@inheritdoc}
    */
   protected function getNewEntityValues($langcode) {
-    return array('title' => array(array('value' => $this->randomMachineName()))) + parent::getNewEntityValues($langcode);
+    return ['title' => [['value' => $this->randomMachineName()]]] + parent::getNewEntityValues($langcode);
   }
 
   protected function doTestBasicTranslation() {
@@ -71,14 +71,14 @@ protected function doTestBasicTranslation() {
     $entity = $storage->load($this->entityId);
     foreach ($this->langcodes as $langcode) {
       if ($entity->hasTranslation($langcode)) {
-        $language = new Language(array('id' => $langcode));
+        $language = new Language(['id' => $langcode]);
         // Request the front page in this language and assert that the right
         // translation shows up in the shortcut list with the right path.
-        $this->drupalGet('<front>', array('language' => $language));
-        $expected_path = \Drupal::urlGenerator()->generateFromRoute('user.page', array(), array('language' => $language));
+        $this->drupalGet('<front>', ['language' => $language]);
+        $expected_path = \Drupal::urlGenerator()->generateFromRoute('user.page', [], ['language' => $language]);
         $label = $entity->getTranslation($langcode)->label();
-        $elements = $this->xpath('//nav[contains(@class, "toolbar-lining")]/ul[@class="toolbar-menu"]/li/a[contains(@href, :href) and normalize-space(text())=:label]', array(':href' => $expected_path, ':label' => $label));
-        $this->assertTrue(!empty($elements), format_string('Translated @language shortcut link @label found.', array('@label' => $label, '@language' => $language->getName())));
+        $elements = $this->xpath('//nav[contains(@class, "toolbar-lining")]/ul[@class="toolbar-menu"]/li/a[contains(@href, :href) and normalize-space(text())=:label]', [':href' => $expected_path, ':label' => $label]);
+        $this->assertTrue(!empty($elements), format_string('Translated @language shortcut link @label found.', ['@label' => $label, '@language' => $language->getName()]));
       }
     }
   }
@@ -96,14 +96,14 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
-        $title = t('@title [%language translation]', array(
+        $title = t('@title [%language translation]', [
           '@title' => $entity->getTranslation($langcode)->label(),
           '%language' => $languages[$langcode]->getName(),
-        ));
+        ]);
         $this->assertRaw($title);
       }
     }
@@ -120,7 +120,7 @@ protected function doTestTranslationChanged() {
 
     $this->assertFalse(
       $entity instanceof EntityChangedInterface,
-      format_string('%entity is not implementing EntityChangedInterface.', array('%entity' => $this->entityTypeId))
+      format_string('%entity is not implementing EntityChangedInterface.', ['%entity' => $this->entityTypeId])
     );
   }
 
diff --git a/core/modules/shortcut/tests/src/Functional/ShortcutCacheTagsTest.php b/core/modules/shortcut/tests/src/Functional/ShortcutCacheTagsTest.php
index 23f01459a363a11fe3e89945a657705cbe6999a0..e2d6a226f229eb4f8caf4ac82dfd543bd5b98952 100644
--- a/core/modules/shortcut/tests/src/Functional/ShortcutCacheTagsTest.php
+++ b/core/modules/shortcut/tests/src/Functional/ShortcutCacheTagsTest.php
@@ -18,7 +18,7 @@ class ShortcutCacheTagsTest extends EntityCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('shortcut');
+  public static $modules = ['shortcut'];
 
   /**
    * {@inheritdoc}
@@ -39,12 +39,12 @@ protected function setUp() {
    */
   protected function createEntity() {
     // Create a "Llama" shortcut.
-    $shortcut = Shortcut::create(array(
+    $shortcut = Shortcut::create([
       'shortcut_set' => 'default',
       'title' => t('Llama'),
       'weight' => 0,
       'link' => [['uri' => 'internal:/admin']],
-    ));
+    ]);
     $shortcut->save();
 
     return $shortcut;
diff --git a/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutSetTest.php b/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutSetTest.php
index 86582864143dc7839d21c3cadb978e393f171c1a..b6543723db682e9c70776756985c2eabeefed5c4 100644
--- a/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutSetTest.php
+++ b/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutSetTest.php
@@ -18,12 +18,12 @@ class MigrateShortcutSetTest extends MigrateDrupal7TestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'link',
     'field',
     'shortcut',
     'menu_link_content',
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutSetUsersTest.php b/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutSetUsersTest.php
index 1b15dcdef8c0dcf7fd76ad1c31e27bb75909869b..ae939569cfe6086e0d648e914a9da4b132134480 100644
--- a/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutSetUsersTest.php
+++ b/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutSetUsersTest.php
@@ -17,12 +17,12 @@ class MigrateShortcutSetUsersTest extends MigrateDrupal7TestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'link',
     'field',
     'shortcut',
     'menu_link_content',
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutTest.php b/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutTest.php
index 18f55170a93159cb5e0baf621e378c3cf772d4cb..e685151a5bc358834ca031bfcbc699c5a9f81bc3 100644
--- a/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutTest.php
+++ b/core/modules/shortcut/tests/src/Kernel/Migrate/d7/MigrateShortcutTest.php
@@ -18,12 +18,12 @@ class MigrateShortcutTest extends MigrateDrupal7TestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'link',
     'field',
     'shortcut',
     'menu_link_content',
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/shortcut/tests/src/Unit/Menu/ShortcutLocalTasksTest.php b/core/modules/shortcut/tests/src/Unit/Menu/ShortcutLocalTasksTest.php
index f85a2cf4cab57c4e12124f009375f872e7f0d655..ee9a6559e4e0fa23def3337681b3d3d6da518345 100644
--- a/core/modules/shortcut/tests/src/Unit/Menu/ShortcutLocalTasksTest.php
+++ b/core/modules/shortcut/tests/src/Unit/Menu/ShortcutLocalTasksTest.php
@@ -12,10 +12,10 @@
 class ShortcutLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array(
+    $this->directoryList = [
       'shortcut' => 'core/modules/shortcut',
       'user' => 'core/modules/user',
-    );
+    ];
     parent::setUp();
   }
 
@@ -25,9 +25,9 @@ protected function setUp() {
    * @dataProvider getShortcutPageRoutes
    */
   public function testShortcutPageLocalTasks($route) {
-    $tasks = array(
-      0 => array('shortcut.set_switch', 'entity.user.canonical', 'entity.user.edit_form',),
-    );
+    $tasks = [
+      0 => ['shortcut.set_switch', 'entity.user.canonical', 'entity.user.edit_form',],
+    ];
     $this->assertLocalTasks($route, $tasks);
   }
 
@@ -35,11 +35,11 @@ public function testShortcutPageLocalTasks($route) {
    * Provides a list of routes to test.
    */
   public function getShortcutPageRoutes() {
-    return array(
-      array('entity.user.canonical'),
-      array('entity.user.edit_form'),
-      array('shortcut.set_switch'),
-    );
+    return [
+      ['entity.user.canonical'],
+      ['entity.user.edit_form'],
+      ['shortcut.set_switch'],
+    ];
   }
 
 }
diff --git a/core/modules/simpletest/simpletest.install b/core/modules/simpletest/simpletest.install
index 9b3ad90b01b6c34df85611664a32cae85c86029f..b6cfc80e100c204a4372b6fdecb5bf2cb2578359 100644
--- a/core/modules/simpletest/simpletest.install
+++ b/core/modules/simpletest/simpletest.install
@@ -16,25 +16,25 @@
  * Implements hook_requirements().
  */
 function simpletest_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
 
   $has_phpunit = class_exists('\PHPUnit_Framework_TestCase');
   $has_curl = function_exists('curl_init');
   $open_basedir = ini_get('open_basedir');
 
-  $requirements['phpunit'] = array(
+  $requirements['phpunit'] = [
     'title' => t('PHPUnit dependency'),
     'value' => $has_phpunit ? t('Found') : t('Not found'),
-  );
+  ];
   if (!$has_phpunit) {
     $requirements['phpunit']['severity'] = REQUIREMENT_ERROR;
     $requirements['phpunit']['description'] = t("The testing framework requires the PHPUnit package. Please run 'composer install --dev' to ensure it is present.");
   }
 
-  $requirements['curl'] = array(
+  $requirements['curl'] = [
     'title' => t('cURL'),
     'value' => $has_curl ? t('Enabled') : t('Not found'),
-  );
+  ];
   if (!$has_curl) {
     $requirements['curl']['severity'] = REQUIREMENT_ERROR;
     $requirements['curl']['description'] = t('The testing framework requires the <a href="https://secure.php.net/manual/en/curl.setup.php">PHP cURL library</a>. For more information, see the <a href="https://www.drupal.org/requirements/php/curl">online information on installing the PHP cURL extension</a>.');
@@ -43,10 +43,10 @@ function simpletest_requirements($phase) {
   // SimpleTest currently needs 2 cURL options which are incompatible with
   // having PHP's open_basedir restriction set.
   // See https://www.drupal.org/node/674304.
-  $requirements['php_open_basedir'] = array(
+  $requirements['php_open_basedir'] = [
     'title' => t('PHP open_basedir restriction'),
     'value' => $open_basedir ? t('Enabled') : t('Disabled'),
-  );
+  ];
   if ($open_basedir) {
     $requirements['php_open_basedir']['severity'] = REQUIREMENT_ERROR;
     $requirements['php_open_basedir']['description'] = t('The testing framework requires the PHP <a href="http://php.net/manual/ini.core.php#ini.open-basedir">open_basedir</a> restriction to be disabled. Check your webserver configuration or contact your web host.');
@@ -57,29 +57,29 @@ function simpletest_requirements($phase) {
   $memory_limit = ini_get('memory_limit');
   if (!Environment::checkMemoryLimit(SIMPLETEST_MINIMUM_PHP_MEMORY_LIMIT, $memory_limit)) {
     $requirements['php_memory_limit']['severity'] = REQUIREMENT_WARNING;
-    $requirements['php_memory_limit']['description'] = t('The testing framework requires the PHP memory limit to be at least %memory_minimum_limit. The current value is %memory_limit. <a href=":url">Follow these steps to continue</a>.', array('%memory_limit' => $memory_limit, '%memory_minimum_limit' => SIMPLETEST_MINIMUM_PHP_MEMORY_LIMIT, ':url' => 'https://www.drupal.org/node/207036'));
+    $requirements['php_memory_limit']['description'] = t('The testing framework requires the PHP memory limit to be at least %memory_minimum_limit. The current value is %memory_limit. <a href=":url">Follow these steps to continue</a>.', ['%memory_limit' => $memory_limit, '%memory_minimum_limit' => SIMPLETEST_MINIMUM_PHP_MEMORY_LIMIT, ':url' => 'https://www.drupal.org/node/207036']);
   }
 
   $site_directory = 'sites/simpletest';
   if (!drupal_verify_install_file(\Drupal::root() . '/' . $site_directory, FILE_EXIST | FILE_READABLE | FILE_WRITABLE | FILE_EXECUTABLE, 'dir')) {
-    $requirements['simpletest_site_directory'] = array(
+    $requirements['simpletest_site_directory'] = [
       'title' => t('Simpletest site directory'),
       'value' => is_dir(\Drupal::root() . '/' . $site_directory) ? t('Not writable') : t('Missing'),
       'severity' => REQUIREMENT_ERROR,
-      'description' => t('The testing framework requires the %sites-simpletest directory to exist and be writable in order to run tests.', array(
+      'description' => t('The testing framework requires the %sites-simpletest directory to exist and be writable in order to run tests.', [
         '%sites-simpletest' => $site_directory,
-      )),
-    );
+      ]),
+    ];
   }
   elseif (!file_save_htaccess(\Drupal::root() . '/' . $site_directory, FALSE)) {
-    $requirements['simpletest_site_directory'] = array(
+    $requirements['simpletest_site_directory'] = [
       'title' => t('Simpletest site directory'),
       'value' => t('Not protected'),
       'severity' => REQUIREMENT_ERROR,
-      'description' => t('The file %file does not exist and could not be created automatically, which poses a security risk. Ensure that the directory is writable.', array(
+      'description' => t('The file %file does not exist and could not be created automatically, which poses a security risk. Ensure that the directory is writable.', [
         '%file' => $site_directory . '/.htaccess',
-      )),
-    );
+      ]),
+    ];
   }
 
   return $requirements;
@@ -89,91 +89,91 @@ function simpletest_requirements($phase) {
  * Implements hook_schema().
  */
 function simpletest_schema() {
-  $schema['simpletest'] = array(
+  $schema['simpletest'] = [
     'description' => 'Stores simpletest messages',
-    'fields' => array(
-      'message_id'  => array(
+    'fields' => [
+      'message_id'  => [
         'type' => 'serial',
         'not null' => TRUE,
         'description' => 'Primary Key: Unique simpletest message ID.',
-      ),
-      'test_id' => array(
+      ],
+      'test_id' => [
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'description' => 'Test ID, messages belonging to the same ID are reported together',
-      ),
-      'test_class' => array(
+      ],
+      'test_class' => [
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'The name of the class that created this message.',
-      ),
-      'status' => array(
+      ],
+      'status' => [
         'type' => 'varchar',
         'length' => 9,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Message status. Core understands pass, fail, exception.',
-      ),
-      'message' => array(
+      ],
+      'message' => [
         'type' => 'text',
         'not null' => TRUE,
         'description' => 'The message itself.',
-      ),
-      'message_group' => array(
+      ],
+      'message_group' => [
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'The message group this message belongs to. For example: warning, browser, user.',
-      ),
-      'function' => array(
+      ],
+      'function' => [
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Name of the assertion function or method that created this message.',
-      ),
-      'line' => array(
+      ],
+      'line' => [
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
         'description' => 'Line number on which the function is called.',
-      ),
-      'file' => array(
+      ],
+      'file' => [
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Name of the file where the function is called.',
-      ),
-    ),
-    'primary key' => array('message_id'),
-    'indexes' => array(
-      'reporter' => array('test_class', 'message_id'),
-    ),
-  );
-  $schema['simpletest_test_id'] = array(
+      ],
+    ],
+    'primary key' => ['message_id'],
+    'indexes' => [
+      'reporter' => ['test_class', 'message_id'],
+    ],
+  ];
+  $schema['simpletest_test_id'] = [
     'description' => 'Stores simpletest test IDs, used to auto-increment the test ID so that a fresh test ID is used.',
-    'fields' => array(
-      'test_id'  => array(
+    'fields' => [
+      'test_id'  => [
         'type' => 'serial',
         'not null' => TRUE,
         'description' => 'Primary Key: Unique simpletest ID used to group test results together. Each time a set of tests
                             are run a new test ID is used.',
-      ),
-      'last_prefix' => array(
+      ],
+      'last_prefix' => [
         'type' => 'varchar',
         'length' => 60,
         'not null' => FALSE,
         'default' => '',
         'description' => 'The last database prefix used during testing.',
-      ),
-    ),
-    'primary key' => array('test_id'),
-  );
+      ],
+    ],
+    'primary key' => ['test_id'],
+  ];
   return $schema;
 }
 
diff --git a/core/modules/simpletest/simpletest.module b/core/modules/simpletest/simpletest.module
index c9eed3be57d511d02ffe152383f02c93e36c78fb..aa1088f2c1e6a86036cf35e057044003e521a512 100644
--- a/core/modules/simpletest/simpletest.module
+++ b/core/modules/simpletest/simpletest.module
@@ -24,11 +24,11 @@ function simpletest_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.simpletest':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Testing module provides a framework for running automated tests. It can be used to verify a working state of Drupal before and after any code changes, or as a means for developers to write and execute tests for their modules. For more information, see the <a href=":simpletest">online documentation for the Testing module</a>.', array(':simpletest' => 'https://www.drupal.org/documentation/modules/simpletest')) . '</p>';
+      $output .= '<p>' . t('The Testing module provides a framework for running automated tests. It can be used to verify a working state of Drupal before and after any code changes, or as a means for developers to write and execute tests for their modules. For more information, see the <a href=":simpletest">online documentation for the Testing module</a>.', [':simpletest' => 'https://www.drupal.org/documentation/modules/simpletest']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Running tests') . '</dt>';
-      $output .= '<dd><p>' . t('Visit the <a href=":admin-simpletest">Testing page</a> to display a list of available tests. For comprehensive testing, select <em>all</em> tests, or individually select tests for more targeted testing. Note that it might take several minutes for all tests to complete.', array(':admin-simpletest' => \Drupal::url('simpletest.test_form'))) . '</p>';
+      $output .= '<dd><p>' . t('Visit the <a href=":admin-simpletest">Testing page</a> to display a list of available tests. For comprehensive testing, select <em>all</em> tests, or individually select tests for more targeted testing. Note that it might take several minutes for all tests to complete.', [':admin-simpletest' => \Drupal::url('simpletest.test_form')]) . '</p>';
       $output .= '<p>' . t('After the tests run, a message will be displayed next to each test group indicating whether tests within it passed, failed, or had exceptions. A pass means that the test returned the expected results, while fail means that it did not. An exception normally indicates an error outside of the test, such as a PHP warning or notice. If there were failures or exceptions, the results will be expanded to show details, and the tests that had failures or exceptions will be indicated in red or pink rows. You can then use these results to refine your code and tests, until all tests pass.') . '</p></dd>';
       $output .= '</dl>';
       return $output;
@@ -43,11 +43,11 @@ function simpletest_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function simpletest_theme() {
-  return array(
-    'simpletest_result_summary' => array(
-      'variables' => array('label' => NULL, 'items' => array(), 'pass' => 0, 'fail' => 0, 'exception' => 0, 'debug' => 0),
-    ),
-  );
+  return [
+    'simpletest_result_summary' => [
+      'variables' => ['label' => NULL, 'items' => [], 'pass' => 0, 'fail' => 0, 'exception' => 0, 'debug' => 0],
+    ],
+  ];
 }
 
 /**
@@ -138,7 +138,7 @@ function simpletest_run_tests($test_list) {
   }
 
   $test_id = db_insert('simpletest_test_id')
-    ->useDefaults(array('test_id'))
+    ->useDefaults(['test_id'])
     ->execute();
 
   // Clear out the previous verbose files.
@@ -148,16 +148,16 @@ function simpletest_run_tests($test_list) {
   $first_test = reset($test_list);
   $info = TestDiscovery::getTestInfo($first_test);
 
-  $batch = array(
+  $batch = [
     'title' => t('Running tests'),
-    'operations' => array(
-      array('_simpletest_batch_operation', array($test_list, $test_id)),
-    ),
+    'operations' => [
+      ['_simpletest_batch_operation', [$test_list, $test_id]],
+    ],
     'finished' => '_simpletest_batch_finished',
     'progress_message' => '',
-    'library' => array('simpletest/drupal.simpletest'),
-    'init_message' => t('Processing test @num of @max - %test.', array('%test' => $info['name'], '@num' => '1', '@max' => count($test_list))),
-  );
+    'library' => ['simpletest/drupal.simpletest'],
+    'init_message' => t('Processing test @num of @max - %test.', ['%test' => $info['name'], '@num' => '1', '@max' => count($test_list)]),
+  ];
   batch_set($batch);
 
   \Drupal::moduleHandler()->invokeAll('test_group_started');
@@ -237,12 +237,12 @@ function simpletest_summarize_phpunit_result($results) {
   $summaries = [];
   foreach ($results as $result) {
     if (!isset($summaries[$result['test_class']])) {
-      $summaries[$result['test_class']] = array(
+      $summaries[$result['test_class']] = [
         '#pass' => 0,
         '#fail' => 0,
         '#exception' => 0,
         '#debug' => 0,
-      );
+      ];
     }
 
     switch ($result['status']) {
@@ -322,13 +322,13 @@ function simpletest_phpunit_run_command(array $unescaped_test_classnames, $phpun
   }
   $phpunit_bin = simpletest_phpunit_command();
 
-  $command = array(
+  $command = [
     $phpunit_bin,
     '--log-junit',
     escapeshellarg($phpunit_file),
     '--printer',
     escapeshellarg(SimpletestUiPrinter::class),
-  );
+  ];
 
   // Optimized for running a single test.
   if (count($unescaped_test_classnames) == 1) {
@@ -342,10 +342,10 @@ function simpletest_phpunit_run_command(array $unescaped_test_classnames, $phpun
     }, $unescaped_test_classnames);
 
     $filter_string = implode("|", $escaped_test_classnames);
-    $command = array_merge($command, array(
+    $command = array_merge($command, [
       '--filter',
       escapeshellarg($filter_string),
-    ));
+    ]);
   }
 
   // Need to change directories before running the command so that we can use
@@ -401,7 +401,7 @@ function _simpletest_batch_operation($test_list_init, $test_id, &$context) {
     // First iteration: initialize working values.
     $test_list = $test_list_init;
     $context['sandbox']['max'] = count($test_list);
-    $test_results = array('#pass' => 0, '#fail' => 0, '#exception' => 0, '#debug' => 0);
+    $test_results = ['#pass' => 0, '#fail' => 0, '#exception' => 0, '#debug' => 0];
   }
   else {
     // Nth iteration: get the current values where we last stored them.
@@ -420,7 +420,7 @@ function _simpletest_batch_operation($test_list_init, $test_id, &$context) {
   else {
     $test = new $test_class($test_id);
     $test->run();
-    \Drupal::moduleHandler()->invokeAll('test_finished', array($test->results));
+    \Drupal::moduleHandler()->invokeAll('test_finished', [$test->results]);
     $test_results[$test_class] = $test->results;
   }
   $size = count($test_list);
@@ -431,25 +431,25 @@ function _simpletest_batch_operation($test_list_init, $test_id, &$context) {
     $test_results[$key] += $value;
   }
   $test_results[$test_class]['#name'] = $info['name'];
-  $items = array();
+  $items = [];
   foreach (Element::children($test_results) as $class) {
-    $class_test_result = $test_results[$class] + array(
+    $class_test_result = $test_results[$class] + [
       '#theme' => 'simpletest_result_summary',
       '#label' => t($test_results[$class]['#name'] . ':'),
-    );
+    ];
     array_unshift($items, drupal_render($class_test_result));
   }
-  $context['message'] = t('Processed test @num of @max - %test.', array('%test' => $info['name'], '@num' => $max - $size, '@max' => $max));
-  $overall_results = $test_results + array(
+  $context['message'] = t('Processed test @num of @max - %test.', ['%test' => $info['name'], '@num' => $max - $size, '@max' => $max]);
+  $overall_results = $test_results + [
     '#theme' => 'simpletest_result_summary',
     '#label' => t('Overall results:'),
-  );
+  ];
   $context['message'] .= drupal_render($overall_results);
 
-  $item_list = array(
+  $item_list = [
     '#theme' => 'item_list',
     '#items' => $items,
-  );
+  ];
   $context['message'] .= drupal_render($item_list);
 
   // Save working values for the next iteration.
@@ -467,7 +467,7 @@ function _simpletest_batch_operation($test_list_init, $test_id, &$context) {
  */
 function _simpletest_batch_finished($success, $results, $operations, $elapsed) {
   if ($success) {
-    drupal_set_message(t('The test run finished in @elapsed.', array('@elapsed' => $elapsed)));
+    drupal_set_message(t('The test run finished in @elapsed.', ['@elapsed' => $elapsed]));
   }
   else {
     // Use the test_id passed as a parameter to _simpletest_batch_operation().
@@ -496,16 +496,16 @@ function _simpletest_batch_finished($success, $results, $operations, $elapsed) {
  */
 function simpletest_last_test_get($test_id) {
   $last_prefix = TestDatabase::getConnection()
-    ->queryRange('SELECT last_prefix FROM {simpletest_test_id} WHERE test_id = :test_id', 0, 1, array(
+    ->queryRange('SELECT last_prefix FROM {simpletest_test_id} WHERE test_id = :test_id', 0, 1, [
       ':test_id' => $test_id,
-    ))
+    ])
     ->fetchField();
   $last_test_class = TestDatabase::getConnection()
-    ->queryRange('SELECT test_class FROM {simpletest} WHERE test_id = :test_id ORDER BY message_id DESC', 0, 1, array(
+    ->queryRange('SELECT test_class FROM {simpletest} WHERE test_id = :test_id ORDER BY message_id DESC', 0, 1, [
       ':test_id' => $test_id,
-    ))
+    ])
     ->fetchField();
-  return array($last_prefix, $last_test_class);
+  return [$last_prefix, $last_test_class];
 }
 
 /**
@@ -533,10 +533,10 @@ function simpletest_log_read($test_id, $database_prefix, $test_class) {
       if (preg_match('/\[.*?\] (.*?): (.*?) in (.*) on line (\d+)/', $line, $match)) {
         // Parse PHP fatal errors for example: PHP Fatal error: Call to
         // undefined function break_me() in /path/to/file.php on line 17
-        $caller = array(
+        $caller = [
           'line' => $match[4],
           'file' => $match[3],
-        );
+        ];
         TestBase::insertAssert($test_id, $test_class, FALSE, $match[2], $match[1], $caller);
       }
       else {
@@ -692,7 +692,7 @@ function simpletest_clean_temporary_directories() {
     foreach ($files as $file) {
       if ($file[0] != '.') {
         $path = DRUPAL_ROOT . '/sites/simpletest/' . $file;
-        file_unmanaged_delete_recursive($path, array('Drupal\simpletest\TestBase', 'filePreDeleteCallback'));
+        file_unmanaged_delete_recursive($path, ['Drupal\simpletest\TestBase', 'filePreDeleteCallback']);
         $count++;
       }
     }
@@ -719,7 +719,7 @@ function simpletest_clean_results_table($test_id = NULL) {
   if (\Drupal::config('simpletest.settings')->get('clear_results')) {
     $connection = TestDatabase::getConnection();
     if ($test_id) {
-      $count = $connection->query('SELECT COUNT(test_id) FROM {simpletest_test_id} WHERE test_id = :test_id', array(':test_id' => $test_id))->fetchField();
+      $count = $connection->query('SELECT COUNT(test_id) FROM {simpletest_test_id} WHERE test_id = :test_id', [':test_id' => $test_id])->fetchField();
 
       $connection->delete('simpletest')
         ->condition('test_id', $test_id)
@@ -771,7 +771,7 @@ function simpletest_phpunit_xml_to_rows($test_id, $phpunit_xml_file) {
   if (!$contents) {
     return;
   }
-  $records = array();
+  $records = [];
   $testcases = simpletest_phpunit_find_testcases(new SimpleXMLElement($contents));
   foreach ($testcases as $testcase) {
     $records[] = simpletest_phpunit_testcase_to_row($test_id, $testcase);
@@ -791,7 +791,7 @@ function simpletest_phpunit_xml_to_rows($test_id, $phpunit_xml_file) {
  *   A list of all test cases.
  */
 function simpletest_phpunit_find_testcases(\SimpleXMLElement $element, \SimpleXMLElement $parent = NULL) {
-  $testcases = array();
+  $testcases = [];
 
   if (!isset($parent)) {
     $parent = $element;
@@ -845,7 +845,7 @@ function simpletest_phpunit_testcase_to_row($test_id, \SimpleXMLElement $testcas
 
   $attributes = $testcase->attributes();
 
-  $record = array(
+  $record = [
     'test_id' => $test_id,
     'test_class' => (string) $attributes->class,
     'status' => $pass ? 'pass' : 'fail',
@@ -855,6 +855,6 @@ function simpletest_phpunit_testcase_to_row($test_id, \SimpleXMLElement $testcas
     'function' => $attributes->class . '->' . $attributes->name . '()',
     'line' => $attributes->line ?: 0,
     'file' => $attributes->file,
-  );
+  ];
   return $record;
 }
diff --git a/core/modules/simpletest/src/AssertContentTrait.php b/core/modules/simpletest/src/AssertContentTrait.php
index e19f319c7ce7435de122af8d4a81357800a77a6b..5a6c8c06ef5ed68c78fec8ff82650967a607d345 100644
--- a/core/modules/simpletest/src/AssertContentTrait.php
+++ b/core/modules/simpletest/src/AssertContentTrait.php
@@ -61,7 +61,7 @@ protected function setRawContent($content) {
     $this->content = $content;
     $this->plainTextContent = NULL;
     $this->elements = NULL;
-    $this->drupalSettings = array();
+    $this->drupalSettings = [];
     if (preg_match('@<script type="application/json" data-drupal-selector="drupal-settings-json">([^<]*)</script>@', $content, $matches)) {
       $this->drupalSettings = Json::decode($matches[1]);
     }
@@ -75,7 +75,7 @@ protected function getTextContent() {
       $raw_content = $this->getRawContent();
       // Strip everything between the HEAD tags.
       $raw_content = preg_replace('@<head>(.+?)</head>@si', '', $raw_content);
-      $this->plainTextContent = Xss::filter($raw_content, array());
+      $this->plainTextContent = Xss::filter($raw_content, []);
     }
     return $this->plainTextContent;
   }
@@ -127,7 +127,7 @@ protected function parse() {
       $html_dom = new \DOMDocument();
       @$html_dom->loadHTML('<?xml encoding="UTF-8">' . $this->getRawContent());
       if ($html_dom) {
-        $this->pass(SafeMarkup::format('Valid HTML found on "@path"', array('@path' => $this->getUrl())), 'Browser');
+        $this->pass(SafeMarkup::format('Valid HTML found on "@path"', ['@path' => $this->getUrl()]), 'Browser');
         // It's much easier to work with simplexml than DOM, luckily enough
         // we can just simply import our DOM tree.
         $this->elements = simplexml_import_dom($html_dom);
@@ -170,7 +170,7 @@ protected function getUrl() {
    * @return string
    *   An XPath query with arguments replaced.
    */
-  protected function buildXPathQuery($xpath, array $args = array()) {
+  protected function buildXPathQuery($xpath, array $args = []) {
     // Replace placeholders.
     foreach ($args as $placeholder => $value) {
       // Cast MarkupInterface objects to string.
@@ -260,7 +260,7 @@ protected function cssSelect($selector) {
    *   Option elements in select.
    */
   protected function getAllOptions(\SimpleXMLElement $element) {
-    $options = array();
+    $options = [];
     // Add all options items.
     foreach ($element->option as $option) {
       $options[] = $option;
@@ -300,8 +300,8 @@ protected function getAllOptions(\SimpleXMLElement $element) {
   protected function assertLink($label, $index = 0, $message = '', $group = 'Other') {
     // Cast MarkupInterface objects to string.
     $label = (string) $label;
-    $links = $this->xpath('//a[normalize-space(text())=:label]', array(':label' => $label));
-    $message = ($message ? $message : strtr('Link with label %label found.', array('%label' => $label)));
+    $links = $this->xpath('//a[normalize-space(text())=:label]', [':label' => $label]);
+    $message = ($message ? $message : strtr('Link with label %label found.', ['%label' => $label]));
     return $this->assert(isset($links[$index]), $message, $group);
   }
 
@@ -327,8 +327,8 @@ protected function assertLink($label, $index = 0, $message = '', $group = 'Other
   protected function assertNoLink($label, $message = '', $group = 'Other') {
     // Cast MarkupInterface objects to string.
     $label = (string) $label;
-    $links = $this->xpath('//a[normalize-space(text())=:label]', array(':label' => $label));
-    $message = ($message ? $message : SafeMarkup::format('Link with label %label not found.', array('%label' => $label)));
+    $links = $this->xpath('//a[normalize-space(text())=:label]', [':label' => $label]);
+    $message = ($message ? $message : SafeMarkup::format('Link with label %label not found.', ['%label' => $label]));
     return $this->assert(empty($links), $message, $group);
   }
 
@@ -354,8 +354,8 @@ protected function assertNoLink($label, $message = '', $group = 'Other') {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertLinkByHref($href, $index = 0, $message = '', $group = 'Other') {
-    $links = $this->xpath('//a[contains(@href, :href)]', array(':href' => $href));
-    $message = ($message ? $message : SafeMarkup::format('Link containing href %href found.', array('%href' => $href)));
+    $links = $this->xpath('//a[contains(@href, :href)]', [':href' => $href]);
+    $message = ($message ? $message : SafeMarkup::format('Link containing href %href found.', ['%href' => $href]));
     return $this->assert(isset($links[$index]), $message, $group);
   }
 
@@ -379,8 +379,8 @@ protected function assertLinkByHref($href, $index = 0, $message = '', $group = '
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertNoLinkByHref($href, $message = '', $group = 'Other') {
-    $links = $this->xpath('//a[contains(@href, :href)]', array(':href' => $href));
-    $message = ($message ? $message : SafeMarkup::format('No link containing href %href found.', array('%href' => $href)));
+    $links = $this->xpath('//a[contains(@href, :href)]', [':href' => $href]);
+    $message = ($message ? $message : SafeMarkup::format('No link containing href %href found.', ['%href' => $href]));
     return $this->assert(empty($links), $message, $group);
   }
 
@@ -404,8 +404,8 @@ protected function assertNoLinkByHref($href, $message = '', $group = 'Other') {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertNoLinkByHrefInMainRegion($href, $message = '', $group = 'Other') {
-    $links = $this->xpath('//main//a[contains(@href, :href)]', array(':href' => $href));
-    $message = ($message ? $message : SafeMarkup::format('No link containing href %href found.', array('%href' => $href)));
+    $links = $this->xpath('//main//a[contains(@href, :href)]', [':href' => $href]);
+    $message = ($message ? $message : SafeMarkup::format('No link containing href %href found.', ['%href' => $href]));
     return $this->assert(empty($links), $message, $group);
   }
 
@@ -604,7 +604,7 @@ protected function assertNoText($text, $message = '', $group = 'Other') {
    */
   protected function assertTextHelper($text, $message = '', $group = 'Other', $not_exists = TRUE) {
     if (!$message) {
-      $message = !$not_exists ? SafeMarkup::format('"@text" found', array('@text' => $text)) : SafeMarkup::format('"@text" not found', array('@text' => $text));
+      $message = !$not_exists ? SafeMarkup::format('"@text" found', ['@text' => $text]) : SafeMarkup::format('"@text" not found', ['@text' => $text]);
     }
     return $this->assert($not_exists == (strpos($this->getTextContent(), (string) $text) === FALSE), $message, $group);
   }
@@ -723,7 +723,7 @@ protected function assertUniqueTextHelper($text, $message = '', $group = 'Other'
    */
   protected function assertPattern($pattern, $message = '', $group = 'Other') {
     if (!$message) {
-      $message = SafeMarkup::format('Pattern "@pattern" found', array('@pattern' => $pattern));
+      $message = SafeMarkup::format('Pattern "@pattern" found', ['@pattern' => $pattern]);
     }
     return $this->assert((bool) preg_match($pattern, $this->getRawContent()), $message, $group);
   }
@@ -749,7 +749,7 @@ protected function assertPattern($pattern, $message = '', $group = 'Other') {
    */
   protected function assertNoPattern($pattern, $message = '', $group = 'Other') {
     if (!$message) {
-      $message = SafeMarkup::format('Pattern "@pattern" not found', array('@pattern' => $pattern));
+      $message = SafeMarkup::format('Pattern "@pattern" not found', ['@pattern' => $pattern]);
     }
     return $this->assert(!preg_match($pattern, $this->getRawContent()), $message, $group);
   }
@@ -772,7 +772,7 @@ protected function assertNoPattern($pattern, $message = '', $group = 'Other') {
    */
   protected function assertTextPattern($pattern, $message = NULL, $group = 'Other') {
     if (!isset($message)) {
-      $message = SafeMarkup::format('Pattern "@pattern" found', array('@pattern' => $pattern));
+      $message = SafeMarkup::format('Pattern "@pattern" found', ['@pattern' => $pattern]);
     }
     return $this->assert((bool) preg_match($pattern, $this->getTextContent()), $message, $group);
   }
@@ -804,10 +804,10 @@ protected function assertTitle($title, $message = '', $group = 'Other') {
       $actual = $this->castSafeStrings($actual);
       $title = $this->castSafeStrings($title);
       if (!$message) {
-        $message = SafeMarkup::format('Page title @actual is equal to @expected.', array(
+        $message = SafeMarkup::format('Page title @actual is equal to @expected.', [
           '@actual' => var_export($actual, TRUE),
           '@expected' => var_export($title, TRUE),
-        ));
+        ]);
       }
       return $this->assertEqual($actual, $title, $message, $group);
     }
@@ -836,10 +836,10 @@ protected function assertTitle($title, $message = '', $group = 'Other') {
   protected function assertNoTitle($title, $message = '', $group = 'Other') {
     $actual = (string) current($this->xpath('//title'));
     if (!$message) {
-      $message = SafeMarkup::format('Page title @actual is not equal to @unexpected.', array(
+      $message = SafeMarkup::format('Page title @actual is not equal to @unexpected.', [
         '@actual' => var_export($actual, TRUE),
         '@unexpected' => var_export($title, TRUE),
-      ));
+      ]);
     }
     return $this->assertNotEqual($actual, $title, $message, $group);
   }
@@ -867,7 +867,7 @@ protected function assertNoTitle($title, $message = '', $group = 'Other') {
    * @return bool
    *   TRUE on pass, FALSE on fail.
    */
-  protected function assertThemeOutput($callback, array $variables = array(), $expected = '', $message = '', $group = 'Other') {
+  protected function assertThemeOutput($callback, array $variables = [], $expected = '', $message = '', $group = 'Other') {
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
     $renderer = \Drupal::service('renderer');
 
@@ -885,7 +885,7 @@ protected function assertThemeOutput($callback, array $variables = array(), $exp
     if (!$message) {
       $message = '%callback rendered correctly.';
     }
-    $message = format_string($message, array('%callback' => 'theme_' . $callback . '()'));
+    $message = format_string($message, ['%callback' => 'theme_' . $callback . '()']);
     return $this->assertIdentical($output, $expected, $message, $group);
   }
 
@@ -1064,15 +1064,15 @@ protected function assertNoFieldByXPath($xpath, $value = NULL, $message = '', $g
   protected function assertFieldByName($name, $value = NULL, $message = NULL, $group = 'Browser') {
     if (!isset($message)) {
       if (!isset($value)) {
-        $message = SafeMarkup::format('Found field with name @name', array(
+        $message = SafeMarkup::format('Found field with name @name', [
           '@name' => var_export($name, TRUE),
-        ));
+        ]);
       }
       else {
-        $message = SafeMarkup::format('Found field with name @name and value @value', array(
+        $message = SafeMarkup::format('Found field with name @name and value @value', [
           '@name' => var_export($name, TRUE),
           '@value' => var_export($value, TRUE),
-        ));
+        ]);
       }
     }
     return $this->assertFieldByXPath($this->constructFieldXpath('name', $name), $value, $message, $group);
@@ -1103,7 +1103,7 @@ protected function assertFieldByName($name, $value = NULL, $message = NULL, $gro
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertNoFieldByName($name, $value = '', $message = '', $group = 'Browser') {
-    return $this->assertNoFieldByXPath($this->constructFieldXpath('name', $name), $value, $message ? $message : SafeMarkup::format('Did not find field by name @name', array('@name' => $name)), $group);
+    return $this->assertNoFieldByXPath($this->constructFieldXpath('name', $name), $value, $message ? $message : SafeMarkup::format('Did not find field by name @name', ['@name' => $name]), $group);
   }
 
   /**
@@ -1136,7 +1136,7 @@ protected function assertFieldById($id, $value = '', $message = '', $group = 'Br
       $value = (string) $value;
     }
     $message = (string) $message;
-    return $this->assertFieldByXPath($this->constructFieldXpath('id', $id), $value, $message ? $message : SafeMarkup::format('Found field by id @id', array('@id' => $id)), $group);
+    return $this->assertFieldByXPath($this->constructFieldXpath('id', $id), $value, $message ? $message : SafeMarkup::format('Found field by id @id', ['@id' => $id]), $group);
   }
 
   /**
@@ -1164,7 +1164,7 @@ protected function assertFieldById($id, $value = '', $message = '', $group = 'Br
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertNoFieldById($id, $value = '', $message = '', $group = 'Browser') {
-    return $this->assertNoFieldByXPath($this->constructFieldXpath('id', $id), $value, $message ? $message : SafeMarkup::format('Did not find field by id @id', array('@id' => $id)), $group);
+    return $this->assertNoFieldByXPath($this->constructFieldXpath('id', $id), $value, $message ? $message : SafeMarkup::format('Did not find field by id @id', ['@id' => $id]), $group);
   }
 
   /**
@@ -1187,8 +1187,8 @@ protected function assertNoFieldById($id, $value = '', $message = '', $group = '
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertFieldChecked($id, $message = '', $group = 'Browser') {
-    $elements = $this->xpath('//input[@id=:id]', array(':id' => $id));
-    return $this->assertTrue(isset($elements[0]) && !empty($elements[0]['checked']), $message ? $message : SafeMarkup::format('Checkbox field @id is checked.', array('@id' => $id)), $group);
+    $elements = $this->xpath('//input[@id=:id]', [':id' => $id]);
+    return $this->assertTrue(isset($elements[0]) && !empty($elements[0]['checked']), $message ? $message : SafeMarkup::format('Checkbox field @id is checked.', ['@id' => $id]), $group);
   }
 
   /**
@@ -1211,8 +1211,8 @@ protected function assertFieldChecked($id, $message = '', $group = 'Browser') {
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertNoFieldChecked($id, $message = '', $group = 'Browser') {
-    $elements = $this->xpath('//input[@id=:id]', array(':id' => $id));
-    return $this->assertTrue(isset($elements[0]) && empty($elements[0]['checked']), $message ? $message : SafeMarkup::format('Checkbox field @id is not checked.', array('@id' => $id)), $group);
+    $elements = $this->xpath('//input[@id=:id]', [':id' => $id]);
+    return $this->assertTrue(isset($elements[0]) && empty($elements[0]['checked']), $message ? $message : SafeMarkup::format('Checkbox field @id is not checked.', ['@id' => $id]), $group);
   }
 
   /**
@@ -1237,8 +1237,8 @@ protected function assertNoFieldChecked($id, $message = '', $group = 'Browser')
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertOption($id, $option, $message = '', $group = 'Browser') {
-    $options = $this->xpath('//select[@id=:id]//option[@value=:option]', array(':id' => $id, ':option' => $option));
-    return $this->assertTrue(isset($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @id exists.', array('@option' => $option, '@id' => $id)), $group);
+    $options = $this->xpath('//select[@id=:id]//option[@value=:option]', [':id' => $id, ':option' => $option]);
+    return $this->assertTrue(isset($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @id exists.', ['@option' => $option, '@id' => $id]), $group);
   }
 
   /**
@@ -1281,8 +1281,8 @@ protected function assertOptionByText($id, $text, $message = '') {
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertOptionWithDrupalSelector($drupal_selector, $option, $message = '', $group = 'Browser') {
-    $options = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]//option[@value=:option]', array(':data_drupal_selector' => $drupal_selector, ':option' => $option));
-    return $this->assertTrue(isset($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector exists.', array('@option' => $option, '@data_drupal_selector' => $drupal_selector)), $group);
+    $options = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]//option[@value=:option]', [':data_drupal_selector' => $drupal_selector, ':option' => $option]);
+    return $this->assertTrue(isset($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector exists.', ['@option' => $option, '@data_drupal_selector' => $drupal_selector]), $group);
   }
 
   /**
@@ -1307,9 +1307,9 @@ protected function assertOptionWithDrupalSelector($drupal_selector, $option, $me
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertNoOption($id, $option, $message = '', $group = 'Browser') {
-    $selects = $this->xpath('//select[@id=:id]', array(':id' => $id));
-    $options = $this->xpath('//select[@id=:id]//option[@value=:option]', array(':id' => $id, ':option' => $option));
-    return $this->assertTrue(isset($selects[0]) && !isset($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @id does not exist.', array('@option' => $option, '@id' => $id)), $group);
+    $selects = $this->xpath('//select[@id=:id]', [':id' => $id]);
+    $options = $this->xpath('//select[@id=:id]//option[@value=:option]', [':id' => $id, ':option' => $option]);
+    return $this->assertTrue(isset($selects[0]) && !isset($options[0]), $message ? $message : SafeMarkup::format('Option @option for field @id does not exist.', ['@option' => $option, '@id' => $id]), $group);
   }
 
   /**
@@ -1336,8 +1336,8 @@ protected function assertNoOption($id, $option, $message = '', $group = 'Browser
    * @todo $id is unusable. Replace with $name.
    */
   protected function assertOptionSelected($id, $option, $message = '', $group = 'Browser') {
-    $elements = $this->xpath('//select[@id=:id]//option[@value=:option]', array(':id' => $id, ':option' => $option));
-    return $this->assertTrue(isset($elements[0]) && !empty($elements[0]['selected']), $message ? $message : SafeMarkup::format('Option @option for field @id is selected.', array('@option' => $option, '@id' => $id)), $group);
+    $elements = $this->xpath('//select[@id=:id]//option[@value=:option]', [':id' => $id, ':option' => $option]);
+    return $this->assertTrue(isset($elements[0]) && !empty($elements[0]['selected']), $message ? $message : SafeMarkup::format('Option @option for field @id is selected.', ['@option' => $option, '@id' => $id]), $group);
   }
 
   /**
@@ -1364,8 +1364,8 @@ protected function assertOptionSelected($id, $option, $message = '', $group = 'B
    * @todo $id is unusable. Replace with $name.
    */
   protected function assertOptionSelectedWithDrupalSelector($drupal_selector, $option, $message = '', $group = 'Browser') {
-    $elements = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]//option[@value=:option]', array(':data_drupal_selector' => $drupal_selector, ':option' => $option));
-    return $this->assertTrue(isset($elements[0]) && !empty($elements[0]['selected']), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector is selected.', array('@option' => $option, '@data_drupal_selector' => $drupal_selector)), $group);
+    $elements = $this->xpath('//select[@data-drupal-selector=:data_drupal_selector]//option[@value=:option]', [':data_drupal_selector' => $drupal_selector, ':option' => $option]);
+    return $this->assertTrue(isset($elements[0]) && !empty($elements[0]['selected']), $message ? $message : SafeMarkup::format('Option @option for field @data_drupal_selector is selected.', ['@option' => $option, '@data_drupal_selector' => $drupal_selector]), $group);
   }
 
   /**
@@ -1390,8 +1390,8 @@ protected function assertOptionSelectedWithDrupalSelector($drupal_selector, $opt
    *   TRUE on pass, FALSE on fail.
    */
   protected function assertNoOptionSelected($id, $option, $message = '', $group = 'Browser') {
-    $elements = $this->xpath('//select[@id=:id]//option[@value=:option]', array(':id' => $id, ':option' => $option));
-    return $this->assertTrue(isset($elements[0]) && empty($elements[0]['selected']), $message ? $message : SafeMarkup::format('Option @option for field @id is not selected.', array('@option' => $option, '@id' => $id)), $group);
+    $elements = $this->xpath('//select[@id=:id]//option[@value=:option]', [':id' => $id, ':option' => $option]);
+    return $this->assertTrue(isset($elements[0]) && empty($elements[0]['selected']), $message ? $message : SafeMarkup::format('Option @option for field @id is not selected.', ['@option' => $option, '@id' => $id]), $group);
   }
 
   /**
@@ -1464,12 +1464,12 @@ protected function assertNoField($field, $message = '', $group = 'Other') {
    * @return bool
    *   TRUE on pass, FALSE on fail.
    */
-  protected function assertNoDuplicateIds($message = '', $group = 'Other', $ids_to_skip = array()) {
+  protected function assertNoDuplicateIds($message = '', $group = 'Other', $ids_to_skip = []) {
     $status = TRUE;
     foreach ($this->xpath('//*[@id]') as $element) {
       $id = (string) $element['id'];
       if (isset($seen_ids[$id]) && !in_array($id, $ids_to_skip)) {
-        $this->fail(SafeMarkup::format('The HTML ID %id is unique.', array('%id' => $id)), $group);
+        $this->fail(SafeMarkup::format('The HTML ID %id is unique.', ['%id' => $id]), $group);
         $status = FALSE;
       }
       $seen_ids[$id] = TRUE;
@@ -1490,7 +1490,7 @@ protected function assertNoDuplicateIds($message = '', $group = 'Other', $ids_to
    */
   protected function constructFieldXpath($attribute, $value) {
     $xpath = '//textarea[@' . $attribute . '=:value]|//input[@' . $attribute . '=:value]|//select[@' . $attribute . '=:value]';
-    return $this->buildXPathQuery($xpath, array(':value' => $value));
+    return $this->buildXPathQuery($xpath, [':value' => $value]);
   }
 
 }
diff --git a/core/modules/simpletest/src/BlockCreationTrait.php b/core/modules/simpletest/src/BlockCreationTrait.php
index 4b36f787d9560d07ab8bd3b5d5c75445ac29edf4..b252d9e9e6524651c5912aa15cff6a5f2dfd7580 100644
--- a/core/modules/simpletest/src/BlockCreationTrait.php
+++ b/core/modules/simpletest/src/BlockCreationTrait.php
@@ -38,19 +38,19 @@ trait BlockCreationTrait {
    * @todo
    *   Add support for creating custom block instances.
    */
-  protected function placeBlock($plugin_id, array $settings = array()) {
+  protected function placeBlock($plugin_id, array $settings = []) {
     $config = \Drupal::configFactory();
-    $settings += array(
+    $settings += [
       'plugin' => $plugin_id,
       'region' => 'sidebar_first',
       'id' => strtolower($this->randomMachineName(8)),
       'theme' => $config->get('system.theme')->get('default'),
       'label' => $this->randomMachineName(8),
-      'visibility' => array(),
+      'visibility' => [],
       'weight' => 0,
-    );
+    ];
     $values = [];
-    foreach (array('region', 'id', 'theme', 'plugin', 'weight', 'visibility') as $key) {
+    foreach (['region', 'id', 'theme', 'plugin', 'weight', 'visibility'] as $key) {
       $values[$key] = $settings[$key];
       // Remove extra values that do not belong in the settings array.
       unset($settings[$key]);
diff --git a/core/modules/simpletest/src/ContentTypeCreationTrait.php b/core/modules/simpletest/src/ContentTypeCreationTrait.php
index 54712df0bd1d61794f27d0029a91c41e3ff7de14..9ad0a21792153eec08d805811bcffe25fb58187d 100644
--- a/core/modules/simpletest/src/ContentTypeCreationTrait.php
+++ b/core/modules/simpletest/src/ContentTypeCreationTrait.php
@@ -22,7 +22,7 @@ trait ContentTypeCreationTrait {
    * @return \Drupal\node\Entity\NodeType
    *   Created content type.
    */
-  protected function createContentType(array $values = array()) {
+  protected function createContentType(array $values = []) {
     // Find a non-existent random type name.
     if (!isset($values['type'])) {
       do {
@@ -32,19 +32,19 @@ protected function createContentType(array $values = array()) {
     else {
       $id = $values['type'];
     }
-    $values += array(
+    $values += [
       'type' => $id,
       'name' => $id,
-    );
+    ];
     $type = NodeType::create($values);
     $status = $type->save();
     node_add_body_field($type);
 
     if ($this instanceof \PHPUnit_Framework_TestCase) {
-      $this->assertSame($status, SAVED_NEW, (new FormattableMarkup('Created content type %type.', array('%type' => $type->id())))->__toString());
+      $this->assertSame($status, SAVED_NEW, (new FormattableMarkup('Created content type %type.', ['%type' => $type->id()]))->__toString());
     }
     else {
-      $this->assertEqual($status, SAVED_NEW, (new FormattableMarkup('Created content type %type.', array('%type' => $type->id())))->__toString());
+      $this->assertEqual($status, SAVED_NEW, (new FormattableMarkup('Created content type %type.', ['%type' => $type->id()]))->__toString());
     }
 
     return $type;
diff --git a/core/modules/simpletest/src/Form/SimpletestResultsForm.php b/core/modules/simpletest/src/Form/SimpletestResultsForm.php
index c22c0a7d0cb72d5d5051400271819d39dc524c58..090ae0276ea60b2d69ad225f168610a7507ae370 100644
--- a/core/modules/simpletest/src/Form/SimpletestResultsForm.php
+++ b/core/modules/simpletest/src/Form/SimpletestResultsForm.php
@@ -59,40 +59,40 @@ public function __construct(Connection $database) {
    * Builds the status image map.
    */
   protected static function buildStatusImageMap() {
-    $image_pass = array(
+    $image_pass = [
       '#theme' => 'image',
       '#uri' => 'core/misc/icons/73b355/check.svg',
       '#width' => 18,
       '#height' => 18,
       '#alt' => 'Pass',
-    );
-    $image_fail = array(
+    ];
+    $image_fail = [
       '#theme' => 'image',
       '#uri' => 'core/misc/icons/e32700/error.svg',
       '#width' => 18,
       '#height' => 18,
       '#alt' => 'Fail',
-    );
-    $image_exception = array(
+    ];
+    $image_exception = [
       '#theme' => 'image',
       '#uri' => 'core/misc/icons/e29700/warning.svg',
       '#width' => 18,
       '#height' => 18,
       '#alt' => 'Exception',
-    );
-    $image_debug = array(
+    ];
+    $image_debug = [
       '#theme' => 'image',
       '#uri' => 'core/misc/icons/e29700/warning.svg',
       '#width' => 18,
       '#height' => 18,
       '#alt' => 'Debug',
-    );
-    return array(
+    ];
+    return [
       'pass' => $image_pass,
       'fail' => $image_fail,
       'exception' => $image_exception,
       'debug' => $image_debug,
-    );
+    ];
   }
 
   /**
@@ -108,10 +108,10 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state, $test_id = NULL) {
     // Make sure there are test results to display and a re-run is not being
     // performed.
-    $results = array();
+    $results = [];
     if (is_numeric($test_id) && !$results = $this->getResults($test_id)) {
       drupal_set_message($this->t('No test results to display.'), 'error');
-      return new RedirectResponse($this->url('simpletest.test_form', array(), array('absolute' => TRUE)));
+      return new RedirectResponse($this->url('simpletest.test_form', [], ['absolute' => TRUE]));
     }
 
     // Load all classes and include CSS.
@@ -120,45 +120,45 @@ public function buildForm(array $form, FormStateInterface $form_state, $test_id
     $filter = static::addResultForm($form, $results, $this->getStringTranslation());
 
     // Actions.
-    $form['#action'] = $this->url('simpletest.result_form', array('test_id' => 're-run'));
-    $form['action'] = array(
+    $form['#action'] = $this->url('simpletest.result_form', ['test_id' => 're-run']);
+    $form['action'] = [
       '#type' => 'fieldset',
       '#title' => $this->t('Actions'),
-      '#attributes' => array('class' => array('container-inline')),
+      '#attributes' => ['class' => ['container-inline']],
       '#weight' => -11,
-    );
+    ];
 
-    $form['action']['filter'] = array(
+    $form['action']['filter'] = [
       '#type' => 'select',
       '#title' => 'Filter',
-      '#options' => array(
-        'all' => $this->t('All (@count)', array('@count' => count($filter['pass']) + count($filter['fail']))),
-        'pass' => $this->t('Pass (@count)', array('@count' => count($filter['pass']))),
-        'fail' => $this->t('Fail (@count)', array('@count' => count($filter['fail']))),
-      ),
-    );
+      '#options' => [
+        'all' => $this->t('All (@count)', ['@count' => count($filter['pass']) + count($filter['fail'])]),
+        'pass' => $this->t('Pass (@count)', ['@count' => count($filter['pass'])]),
+        'fail' => $this->t('Fail (@count)', ['@count' => count($filter['fail'])]),
+      ],
+    ];
     $form['action']['filter']['#default_value'] = ($filter['fail'] ? 'fail' : 'all');
 
     // Categorized test classes for to be used with selected filter value.
-    $form['action']['filter_pass'] = array(
+    $form['action']['filter_pass'] = [
       '#type' => 'hidden',
       '#default_value' => implode(',', $filter['pass']),
-    );
-    $form['action']['filter_fail'] = array(
+    ];
+    $form['action']['filter_fail'] = [
       '#type' => 'hidden',
       '#default_value' => implode(',', $filter['fail']),
-    );
+    ];
 
-    $form['action']['op'] = array(
+    $form['action']['op'] = [
       '#type' => 'submit',
       '#value' => $this->t('Run tests'),
-    );
+    ];
 
-    $form['action']['return'] = array(
+    $form['action']['return'] = [
       '#type' => 'link',
       '#title' => $this->t('Return to list'),
       '#url' => Url::fromRoute('simpletest.test_form'),
-    );
+    ];
 
     if (is_numeric($test_id)) {
       simpletest_clean_results_table($test_id);
@@ -171,8 +171,8 @@ public function buildForm(array $form, FormStateInterface $form_state, $test_id
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    $pass = $form_state->getValue('filter_pass') ? explode(',', $form_state->getValue('filter_pass')) : array();
-    $fail = $form_state->getValue('filter_fail') ? explode(',', $form_state->getValue('filter_fail')) : array();
+    $pass = $form_state->getValue('filter_pass') ? explode(',', $form_state->getValue('filter_pass')) : [];
+    $fail = $form_state->getValue('filter_fail') ? explode(',', $form_state->getValue('filter_fail')) : [];
 
     if ($form_state->getValue('filter') == 'all') {
       $classes = array_merge($pass, $fail);
@@ -189,7 +189,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       return;
     }
 
-    $form_execute = array();
+    $form_execute = [];
     $form_state_execute = new FormState();
     foreach ($classes as $class) {
       $form_state_execute->setValue(['tests', $class], $class);
@@ -247,10 +247,10 @@ protected function getResults($test_id) {
    */
   public static function addResultForm(array &$form, array $results) {
     // Transform the test results to be grouped by test class.
-    $test_results = array();
+    $test_results = [];
     foreach ($results as $result) {
       if (!isset($test_results[$result->test_class])) {
-        $test_results[$result->test_class] = array();
+        $test_results[$result->test_class] = [];
       }
       $test_results[$result->test_class][] = $result;
     }
@@ -258,55 +258,55 @@ public static function addResultForm(array &$form, array $results) {
     $image_status_map = static::buildStatusImageMap();
 
     // Keep track of which test cases passed or failed.
-    $filter = array(
-      'pass' => array(),
-      'fail' => array(),
-    );
+    $filter = [
+      'pass' => [],
+      'fail' => [],
+    ];
 
     // Summary result widget.
-    $form['result'] = array(
+    $form['result'] = [
       '#type' => 'fieldset',
       '#title' => 'Results',
       // Because this is used in a theme-less situation need to provide a
       // default.
-      '#attributes' => array(),
-    );
-    $form['result']['summary'] = $summary = array(
+      '#attributes' => [],
+    ];
+    $form['result']['summary'] = $summary = [
       '#theme' => 'simpletest_result_summary',
       '#pass' => 0,
       '#fail' => 0,
       '#exception' => 0,
       '#debug' => 0,
-    );
+    ];
 
     \Drupal::service('test_discovery')->registerTestNamespaces();
 
     // Cycle through each test group.
-    $header = array(
+    $header = [
       'Message',
       'Group',
       'Filename',
       'Line',
       'Function',
-      array('colspan' => 2, 'data' => 'Status')
-    );
-    $form['result']['results'] = array();
+      ['colspan' => 2, 'data' => 'Status']
+    ];
+    $form['result']['results'] = [];
     foreach ($test_results as $group => $assertions) {
       // Create group details with summary information.
       $info = TestDiscovery::getTestInfo($group);
-      $form['result']['results'][$group] = array(
+      $form['result']['results'][$group] = [
         '#type' => 'details',
         '#title' => $info['name'],
         '#open' => TRUE,
         '#description' => $info['description'],
-      );
+      ];
       $form['result']['results'][$group]['summary'] = $summary;
       $group_summary =& $form['result']['results'][$group]['summary'];
 
       // Create table of assertions for the group.
-      $rows = array();
+      $rows = [];
       foreach ($assertions as $assertion) {
-        $row = array();
+        $row = [];
         $row[] = ['data' => ['#markup' => $assertion->message]];
         $row[] = $assertion->message_group;
         $row[] = \Drupal::service('file_system')->basename(($assertion->file));
@@ -318,16 +318,16 @@ public static function addResultForm(array &$form, array $results) {
         if ($assertion->message_group == 'Debug') {
           $class = 'simpletest-debug';
         }
-        $rows[] = array('data' => $row, 'class' => array($class));
+        $rows[] = ['data' => $row, 'class' => [$class]];
 
         $group_summary['#' . $assertion->status]++;
         $form['result']['summary']['#' . $assertion->status]++;
       }
-      $form['result']['results'][$group]['table'] = array(
+      $form['result']['results'][$group]['table'] = [
         '#type' => 'table',
         '#header' => $header,
         '#rows' => $rows,
-      );
+      ];
 
       // Set summary information.
       $group_summary['#ok'] = $group_summary['#fail'] + $group_summary['#exception'] == 0;
diff --git a/core/modules/simpletest/src/Form/SimpletestSettingsForm.php b/core/modules/simpletest/src/Form/SimpletestSettingsForm.php
index 744915fbea282e57d97b9fe78c95c552319aa958..d1ee436c80598af9a4ffad54bf9aa931e1c8bc12 100644
--- a/core/modules/simpletest/src/Form/SimpletestSettingsForm.php
+++ b/core/modules/simpletest/src/Form/SimpletestSettingsForm.php
@@ -29,56 +29,56 @@ protected function getEditableConfigNames() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('simpletest.settings');
-    $form['general'] = array(
+    $form['general'] = [
       '#type' => 'details',
       '#title' => $this->t('General'),
       '#open' => TRUE,
-    );
-    $form['general']['simpletest_clear_results'] = array(
+    ];
+    $form['general']['simpletest_clear_results'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Clear results after each complete test suite run'),
       '#description' => $this->t('By default SimpleTest will clear the results after they have been viewed on the results page, but in some cases it may be useful to leave the results in the database. The results can then be viewed at <em>admin/config/development/testing/results/[test_id]</em>. The test ID can be found in the database, simpletest table, or kept track of when viewing the results the first time. Additionally, some modules may provide more analysis or features that require this setting to be disabled.'),
       '#default_value' => $config->get('clear_results'),
-    );
-    $form['general']['simpletest_verbose'] = array(
+    ];
+    $form['general']['simpletest_verbose'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Provide verbose information when running tests'),
       '#description' => $this->t('The verbose data will be printed along with the standard assertions and is useful for debugging. The verbose data will be erased between each test suite run. The verbose data output is very detailed and should only be used when debugging.'),
       '#default_value' => $config->get('verbose'),
-    );
+    ];
 
-    $form['httpauth'] = array(
+    $form['httpauth'] = [
       '#type' => 'details',
       '#title' => $this->t('HTTP authentication'),
       '#description' => $this->t('HTTP auth settings to be used by the SimpleTest browser during testing. Useful when the site requires basic HTTP authentication.'),
-    );
-    $form['httpauth']['simpletest_httpauth_method'] = array(
+    ];
+    $form['httpauth']['simpletest_httpauth_method'] = [
       '#type' => 'select',
       '#title' => $this->t('Method'),
-      '#options' => array(
+      '#options' => [
         CURLAUTH_BASIC => $this->t('Basic'),
         CURLAUTH_DIGEST => $this->t('Digest'),
         CURLAUTH_GSSNEGOTIATE => $this->t('GSS negotiate'),
         CURLAUTH_NTLM => $this->t('NTLM'),
         CURLAUTH_ANY => $this->t('Any'),
         CURLAUTH_ANYSAFE => $this->t('Any safe'),
-      ),
+      ],
       '#default_value' => $config->get('httpauth.method'),
-    );
+    ];
     $username = $config->get('httpauth.username');
     $password = $config->get('httpauth.password');
-    $form['httpauth']['simpletest_httpauth_username'] = array(
+    $form['httpauth']['simpletest_httpauth_username'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Username'),
       '#default_value' => $username,
-    );
+    ];
     if (!empty($username) && !empty($password)) {
       $form['httpauth']['simpletest_httpauth_username']['#description'] = $this->t('Leave this blank to delete both the existing username and password.');
     }
-    $form['httpauth']['simpletest_httpauth_password'] = array(
+    $form['httpauth']['simpletest_httpauth_password'] = [
       '#type' => 'password',
       '#title' => $this->t('Password'),
-    );
+    ];
     if ($password) {
       $form['httpauth']['simpletest_httpauth_password']['#description'] = $this->t('To change the password, enter the new password here.');
     }
diff --git a/core/modules/simpletest/src/Form/SimpletestTestForm.php b/core/modules/simpletest/src/Form/SimpletestTestForm.php
index ccd8fe8a3bfb1018e899fe638c42ecf34a1ec58b..f954546eb1605a58c8ff19e28ec208e1c586db31 100644
--- a/core/modules/simpletest/src/Form/SimpletestTestForm.php
+++ b/core/modules/simpletest/src/Form/SimpletestTestForm.php
@@ -61,24 +61,24 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Run tests'),
       '#tableselect' => TRUE,
       '#button_type' => 'primary',
-    );
-    $form['clean'] = array(
+    ];
+    $form['clean'] = [
       '#type' => 'fieldset',
       '#title' => $this->t('Clean test environment'),
       '#description' => $this->t('Remove tables with the prefix "simpletest" and temporary directories that are left over from tests that crashed. This is intended for developers when creating tests.'),
       '#weight' => 200,
-    );
-    $form['clean']['op'] = array(
+    ];
+    $form['clean']['op'] = [
       '#type' => 'submit',
       '#value' => $this->t('Clean environment'),
-      '#submit' => array('simpletest_clean_environment'),
-    );
+      '#submit' => ['simpletest_clean_environment'],
+    ];
 
     // Do not needlessly re-execute a full test discovery if the user input
     // already contains an explicit list of test classes to run.
@@ -88,43 +88,43 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     // JavaScript-only table filters.
-    $form['filters'] = array(
+    $form['filters'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('table-filter', 'js-show'),
-      ),
-    );
-    $form['filters']['text'] = array(
+      '#attributes' => [
+        'class' => ['table-filter', 'js-show'],
+      ],
+    ];
+    $form['filters']['text'] = [
       '#type' => 'search',
       '#title' => $this->t('Search'),
       '#size' => 30,
       '#placeholder' => $this->t('Enter test name…'),
-      '#attributes' => array(
-        'class' => array('table-filter-text'),
+      '#attributes' => [
+        'class' => ['table-filter-text'],
         'data-table' => '#simpletest-test-form',
         'autocomplete' => 'off',
         'title' => $this->t('Enter at least 3 characters of the test name or description to filter by.'),
-      ),
-    );
+      ],
+    ];
 
-    $form['tests'] = array(
+    $form['tests'] = [
       '#type' => 'table',
       '#id' => 'simpletest-form-table',
       '#tableselect' => TRUE,
-      '#header' => array(
-        array('data' => $this->t('Test'), 'class' => array('simpletest-test-label')),
-        array('data' => $this->t('Description'), 'class' => array('simpletest-test-description')),
-      ),
+      '#header' => [
+        ['data' => $this->t('Test'), 'class' => ['simpletest-test-label']],
+        ['data' => $this->t('Description'), 'class' => ['simpletest-test-description']],
+      ],
       '#empty' => $this->t('No tests to display.'),
-      '#attached' => array(
-        'library' => array(
+      '#attached' => [
+        'library' => [
           'simpletest/drupal.simpletest',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     // Define the images used to expand/collapse the test groups.
-    $image_collapsed = array(
+    $image_collapsed = [
       '#theme' => 'image',
       '#uri' => 'core/misc/menu-collapsed.png',
       '#width' => '7',
@@ -132,8 +132,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#alt' => $this->t('Expand'),
       '#title' => $this->t('Expand'),
       '#suffix' => '<a href="#" class="simpletest-collapse">(' . $this->t('Expand') . ')</a>',
-    );
-    $image_extended = array(
+    ];
+    $image_extended = [
       '#theme' => 'image',
       '#uri' => 'core/misc/menu-expanded.png',
       '#width' => '7',
@@ -141,7 +141,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#alt' => $this->t('Collapse'),
       '#title' => $this->t('Collapse'),
       '#suffix' => '<a href="#" class="simpletest-collapse">(' . $this->t('Collapse') . ')</a>',
-    );
+    ];
     $form['tests']['#attached']['drupalSettings']['simpleTest']['images'] = [
       (string) $this->renderer->renderPlain($image_collapsed),
       (string) $this->renderer->renderPlain($image_extended),
@@ -150,9 +150,9 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Generate the list of tests arranged by group.
     $groups = $this->testDiscovery->getTestClasses();
     foreach ($groups as $group => $tests) {
-      $form['tests'][$group] = array(
-        '#attributes' => array('class' => array('simpletest-group')),
-      );
+      $form['tests'][$group] = [
+        '#attributes' => ['class' => ['simpletest-group']],
+      ];
 
       // Make the class name safe for output on the page by replacing all
       // non-word/decimal characters with a dash (-).
@@ -160,47 +160,47 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
       // Override tableselect column with custom selector for this group.
       // This group-select-all checkbox is injected via JavaScript.
-      $form['tests'][$group]['select'] = array(
-        '#wrapper_attributes' => array(
+      $form['tests'][$group]['select'] = [
+        '#wrapper_attributes' => [
           'id' => $group_class,
-          'class' => array('simpletest-group-select-all'),
-        ),
-      );
-      $form['tests'][$group]['title'] = array(
+          'class' => ['simpletest-group-select-all'],
+        ],
+      ];
+      $form['tests'][$group]['title'] = [
         // Expand/collapse image.
         '#prefix' => '<div class="simpletest-image" id="simpletest-test-group-' . $group_class . '"></div>',
         '#markup' => '<label for="' . $group_class . '-group-select-all">' . $group . '</label>',
-        '#wrapper_attributes' => array(
-          'class' => array('simpletest-group-label'),
-        ),
-      );
-      $form['tests'][$group]['description'] = array(
+        '#wrapper_attributes' => [
+          'class' => ['simpletest-group-label'],
+        ],
+      ];
+      $form['tests'][$group]['description'] = [
         '#markup' => '&nbsp;',
-        '#wrapper_attributes' => array(
-          'class' => array('simpletest-group-description'),
-        ),
-      );
+        '#wrapper_attributes' => [
+          'class' => ['simpletest-group-description'],
+        ],
+      ];
 
       // Cycle through each test within the current group.
       foreach ($tests as $class => $info) {
-        $form['tests'][$class] = array(
-          '#attributes' => array('class' => array($group_class . '-test', 'js-hide')),
-        );
-        $form['tests'][$class]['title'] = array(
+        $form['tests'][$class] = [
+          '#attributes' => ['class' => [$group_class . '-test', 'js-hide']],
+        ];
+        $form['tests'][$class]['title'] = [
           '#type' => 'label',
           '#title' => '\\' . $info['name'],
-          '#wrapper_attributes' => array(
-            'class' => array('simpletest-test-label', 'table-filter-text-source'),
-          ),
-        );
-        $form['tests'][$class]['description'] = array(
+          '#wrapper_attributes' => [
+            'class' => ['simpletest-test-label', 'table-filter-text-source'],
+          ],
+        ];
+        $form['tests'][$class]['description'] = [
           '#prefix' => '<div class="description">',
           '#plain_text' => $info['description'],
           '#suffix' => '</div>',
-          '#wrapper_attributes' => array(
-            'class' => array('simpletest-test-description', 'table-filter-text-source'),
-          ),
-        );
+          '#wrapper_attributes' => [
+            'class' => ['simpletest-test-description', 'table-filter-text-source'],
+          ],
+        ];
       }
     }
 
@@ -233,7 +233,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $test_id = simpletest_run_tests($tests_list, 'drupal');
       $form_state->setRedirect(
         'simpletest.result_form',
-        array('test_id' => $test_id)
+        ['test_id' => $test_id]
       );
     }
   }
diff --git a/core/modules/simpletest/src/InstallerTestBase.php b/core/modules/simpletest/src/InstallerTestBase.php
index f1f3a11bfd329fb894d28c332164f5dcf02779f5..92f33dcf5fb18337c372bbcf446e58f5884a2a0f 100644
--- a/core/modules/simpletest/src/InstallerTestBase.php
+++ b/core/modules/simpletest/src/InstallerTestBase.php
@@ -23,7 +23,7 @@ abstract class InstallerTestBase extends WebTestBase {
    *   An array of settings to write out, in the format expected by
    *   drupal_rewrite_settings().
    */
-  protected $settings = array();
+  protected $settings = [];
 
   /**
    * The language code in which to install Drupal.
@@ -46,7 +46,7 @@ abstract class InstallerTestBase extends WebTestBase {
    *
    * @var array
    */
-  protected $parameters = array();
+  protected $parameters = [];
 
   /**
    * A string translation map used for translated installer screens.
@@ -55,9 +55,9 @@ abstract class InstallerTestBase extends WebTestBase {
    *
    * @var array
    */
-  protected $translations = array(
+  protected $translations = [
     'Save and continue' => 'Save and continue',
-  );
+  ];
 
   /**
    * Whether the installer has completed.
@@ -73,12 +73,12 @@ protected function setUp() {
     $this->isInstalled = FALSE;
 
     // Define information about the user 1 account.
-    $this->rootUser = new UserSession(array(
+    $this->rootUser = new UserSession([
       'uid' => 1,
       'name' => 'admin',
       'mail' => 'admin@example.com',
       'pass_raw' => $this->randomMachineName(),
-    ));
+    ]);
 
     // If any $settings are defined for this test, copy and prepare an actual
     // settings.php, so as to resemble a regular installation.
@@ -171,9 +171,9 @@ protected function visitInstaller() {
    * Installer step: Select language.
    */
   protected function setUpLanguage() {
-    $edit = array(
+    $edit = [
       'langcode' => $this->langcode,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, $this->translations['Save and continue']);
   }
 
@@ -181,9 +181,9 @@ protected function setUpLanguage() {
    * Installer step: Select installation profile.
    */
   protected function setUpProfile() {
-    $edit = array(
+    $edit = [
       'profile' => $this->profile,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, $this->translations['Save and continue']);
   }
 
diff --git a/core/modules/simpletest/src/KernelTestBase.php b/core/modules/simpletest/src/KernelTestBase.php
index c804218af60d81ea092a8107372cd96409a0e62d..9b7495af29a78cf33a04b720f8c54e60b5076165 100644
--- a/core/modules/simpletest/src/KernelTestBase.php
+++ b/core/modules/simpletest/src/KernelTestBase.php
@@ -61,7 +61,7 @@ abstract class KernelTestBase extends TestBase {
    *
    * @var array
    */
-  public static $modules = array();
+  public static $modules = [];
 
   private $moduleFiles;
   private $themeFiles;
@@ -71,7 +71,7 @@ abstract class KernelTestBase extends TestBase {
    *
    * @var array
    */
-  protected $configDirectories = array();
+  protected $configDirectories = [];
 
   /**
    * A KeyValueMemoryFactory instance to use when building the container.
@@ -85,7 +85,7 @@ abstract class KernelTestBase extends TestBase {
    *
    * @var array
    */
-  protected $streamWrappers = array();
+  protected $streamWrappers = [];
 
   /**
    * {@inheritdoc}
@@ -101,8 +101,8 @@ function __construct($test_id = NULL) {
   protected function beforePrepareEnvironment() {
     // Copy/prime extension file lists once to avoid filesystem scans.
     if (!isset($this->moduleFiles)) {
-      $this->moduleFiles = \Drupal::state()->get('system.module.files') ?: array();
-      $this->themeFiles = \Drupal::state()->get('system.theme.files') ?: array();
+      $this->moduleFiles = \Drupal::state()->get('system.module.files') ?: [];
+      $this->themeFiles = \Drupal::state()->get('system.theme.files') ?: [];
     }
   }
 
@@ -115,7 +115,7 @@ protected function beforePrepareEnvironment() {
    *   Thrown when CONFIG_SYNC_DIRECTORY cannot be created or made writable.
    */
   protected function prepareConfigDirectories() {
-    $this->configDirectories = array();
+    $this->configDirectories = [];
     include_once DRUPAL_ROOT . '/core/includes/install.inc';
     // Assign the relative path to the global variable.
     $path = $this->siteDirectory . '/config_' . CONFIG_SYNC_DIRECTORY;
@@ -232,11 +232,11 @@ protected function setUp() {
     // \Drupal\Core\Config\ConfigInstaller::installDefaultConfig() to work.
     // Write directly to active storage to avoid early instantiation of
     // the event dispatcher which can prevent modules from registering events.
-    \Drupal::service('config.storage')->write('core.extension', array('module' => array(), 'theme' => array(), 'profile' => ''));
+    \Drupal::service('config.storage')->write('core.extension', ['module' => [], 'theme' => [], 'profile' => '']);
 
     // Collect and set a fixed module list.
     $class = get_class($this);
-    $modules = array();
+    $modules = [];
     while ($class) {
       if (property_exists($class, 'modules')) {
         // Only add the modules, if the $modules property was not inherited.
@@ -262,7 +262,7 @@ protected function setUp() {
     // @see https://www.drupal.org/node/2028109
     file_prepare_directory($this->publicFilesDirectory, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS);
     $this->settingsSet('file_public_path', $this->publicFilesDirectory);
-    $this->streamWrappers = array();
+    $this->streamWrappers = [];
     $this->registerStreamWrapper('public', 'Drupal\Core\StreamWrapper\PublicStream');
     // The temporary stream wrapper is able to operate both with and without
     // configuration.
@@ -328,7 +328,7 @@ public function containerBuild(ContainerBuilder $container) {
         ->addTag('event_subscriber');
     }
 
-    $keyvalue_options = $container->getParameter('factory.keyvalue') ?: array();
+    $keyvalue_options = $container->getParameter('factory.keyvalue') ?: [];
     $keyvalue_options['default'] = 'keyvalue.memory';
     $container->setParameter('factory.keyvalue', $keyvalue_options);
     $container->set('keyvalue.memory', $this->keyValueFactory);
@@ -366,14 +366,14 @@ public function containerBuild(ContainerBuilder $container) {
     }
 
     if ($container->hasDefinition('password')) {
-      $container->getDefinition('password')->setArguments(array(1));
+      $container->getDefinition('password')->setArguments([1]);
     }
 
     // Register the stream wrapper manager.
     $container
       ->register('stream_wrapper_manager', 'Drupal\Core\StreamWrapper\StreamWrapperManager')
       ->addArgument(new Reference('module_handler'))
-      ->addMethodCall('setContainer', array(new Reference('service_container')));
+      ->addMethodCall('setContainer', [new Reference('service_container')]);
 
     $request = Request::create('/');
     $container->get('request_stack')->push($request);
@@ -405,9 +405,9 @@ protected function installConfig(array $modules) {
       }
       \Drupal::service('config.installer')->installDefaultConfig('module', $module);
     }
-    $this->pass(format_string('Installed default config: %modules.', array(
+    $this->pass(format_string('Installed default config: %modules.', [
       '%modules' => implode(', ', $modules),
-    )));
+    ]));
   }
 
   /**
@@ -447,10 +447,10 @@ protected function installSchema($module, $tables) {
       }
       $this->container->get('database')->schema()->createTable($table, $schema);
     }
-    $this->pass(format_string('Installed %module tables: %tables.', array(
+    $this->pass(format_string('Installed %module tables: %tables.', [
       '%tables' => '{' . implode('}, {', $tables) . '}',
       '%module' => $module,
-    )));
+    ]));
   }
 
 
@@ -476,18 +476,18 @@ protected function installEntitySchema($entity_type_id) {
       $all_tables_exist = TRUE;
       foreach ($tables as $table) {
         if (!$db_schema->tableExists($table)) {
-          $this->fail(SafeMarkup::format('Installed entity type table for the %entity_type entity type: %table', array(
+          $this->fail(SafeMarkup::format('Installed entity type table for the %entity_type entity type: %table', [
             '%entity_type' => $entity_type_id,
             '%table' => $table,
-          )));
+          ]));
           $all_tables_exist = FALSE;
         }
       }
       if ($all_tables_exist) {
-        $this->pass(SafeMarkup::format('Installed entity type tables for the %entity_type entity type: %tables', array(
+        $this->pass(SafeMarkup::format('Installed entity type tables for the %entity_type entity type: %tables', [
           '%entity_type' => $entity_type_id,
           '%tables' => '{' . implode('}, {', $tables) . '}',
-        )));
+        ]));
       }
     }
   }
@@ -539,9 +539,9 @@ protected function enableModules(array $modules) {
     // Note that the kernel has rebuilt the container; this $module_handler is
     // no longer the $module_handler instance from above.
     $this->container->get('module_handler')->reload();
-    $this->pass(format_string('Enabled modules: %modules.', array(
+    $this->pass(format_string('Enabled modules: %modules.', [
       '%modules' => implode(', ', $modules),
-    )));
+    ]));
   }
 
   /**
@@ -574,9 +574,9 @@ protected function disableModules(array $modules) {
     // no longer the $module_handler instance from above.
     $module_handler = $this->container->get('module_handler');
     $module_handler->reload();
-    $this->pass(format_string('Disabled modules: %modules.', array(
+    $this->pass(format_string('Disabled modules: %modules.', [
       '%modules' => implode(', ', $modules),
-    )));
+    ]));
   }
 
   /**
diff --git a/core/modules/simpletest/src/NodeCreationTrait.php b/core/modules/simpletest/src/NodeCreationTrait.php
index 9ed55d8093f47c2d163c912f4c081474e19c9d4c..86321a2b99acbbc4bc91f0df3c3d3e6fb2316322 100644
--- a/core/modules/simpletest/src/NodeCreationTrait.php
+++ b/core/modules/simpletest/src/NodeCreationTrait.php
@@ -64,17 +64,17 @@ function getNodeByTitle($title, $reset = FALSE) {
    * @return \Drupal\node\NodeInterface
    *   The created node entity.
    */
-  protected function createNode(array $settings = array()) {
+  protected function createNode(array $settings = []) {
     // Populate defaults array.
-    $settings += array(
-      'body'      => array(array(
+    $settings += [
+      'body'      => [[
         'value' => $this->randomMachineName(32),
         'format' => filter_default_format(),
-      )),
+      ]],
       'title'     => $this->randomMachineName(8),
       'type'      => 'page',
       'uid'       => \Drupal::currentUser()->id(),
-    );
+    ];
     $node = Node::create($settings);
     $node->save();
 
diff --git a/core/modules/simpletest/src/TestBase.php b/core/modules/simpletest/src/TestBase.php
index 14d79099bc3ae41473874c956028b2f8bda6a503..1491cc2af141af42917557eb98490597814aa48c 100644
--- a/core/modules/simpletest/src/TestBase.php
+++ b/core/modules/simpletest/src/TestBase.php
@@ -50,19 +50,19 @@ abstract class TestBase {
    *
    * @var Array
    */
-  public $results = array(
+  public $results = [
     '#pass' => 0,
     '#fail' => 0,
     '#exception' => 0,
     '#debug' => 0,
-  );
+  ];
 
   /**
    * Assertions thrown in that test case.
    *
    * @var Array
    */
-  protected $assertions = array();
+  protected $assertions = [];
 
   /**
    * This class is skipped when looking for the source of an assertion.
@@ -72,7 +72,7 @@ abstract class TestBase {
    * that called it. So we need to skip the classes defining these helper
    * methods.
    */
-  protected $skipClasses = array(__CLASS__ => TRUE);
+  protected $skipClasses = [__CLASS__ => TRUE];
 
   /**
    * TRUE if verbose debugging is enabled.
@@ -255,7 +255,7 @@ abstract protected function setUp();
    *   Array of errors containing a list of unmet requirements.
    */
   protected function checkRequirements() {
-    return array();
+    return [];
   }
 
   /**
@@ -319,7 +319,7 @@ protected function assert($status, $message = '', $group = 'Other', array $calle
     }
 
     // Creation assertion array that can be displayed while tests are running.
-    $assertion = array(
+    $assertion = [
       'test_id' => $this->testId,
       'test_class' => get_class($this),
       'status' => $status,
@@ -328,7 +328,7 @@ protected function assert($status, $message = '', $group = 'Other', array $calle
       'function' => $caller['function'],
       'line' => $caller['line'],
       'file' => $caller['file'],
-    );
+    ];
 
     // Store assertion for display after the test has completed.
     $message_id = $this->storeAssertion($assertion);
@@ -364,19 +364,19 @@ protected function assert($status, $message = '', $group = 'Other', array $calle
    * @see \Drupal\simpletest\TestBase::assert()
    * @see \Drupal\simpletest\TestBase::deleteAssert()
    */
-  public static function insertAssert($test_id, $test_class, $status, $message = '', $group = 'Other', array $caller = array()) {
+  public static function insertAssert($test_id, $test_class, $status, $message = '', $group = 'Other', array $caller = []) {
     // Convert boolean status to string status.
     if (is_bool($status)) {
       $status = $status ? 'pass' : 'fail';
     }
 
-    $caller += array(
+    $caller += [
       'function' => 'Unknown',
       'line' => 0,
       'file' => 'Unknown',
-    );
+    ];
 
-    $assertion = array(
+    $assertion = [
       'test_id' => $test_id,
       'test_class' => $test_class,
       'status' => $status,
@@ -385,7 +385,7 @@ public static function insertAssert($test_id, $test_class, $status, $message = '
       'function' => $caller['function'],
       'line' => $caller['line'],
       'file' => $caller['file'],
-    );
+    ];
 
     // We can't use storeAssertion() because this method is static.
     return self::getDatabaseConnection()
@@ -457,7 +457,7 @@ protected function getAssertionCall() {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertTrue($value, $message = '', $group = 'Other') {
-    return $this->assert((bool) $value, $message ? $message : SafeMarkup::format('Value @value is TRUE.', array('@value' => var_export($value, TRUE))), $group);
+    return $this->assert((bool) $value, $message ? $message : SafeMarkup::format('Value @value is TRUE.', ['@value' => var_export($value, TRUE)]), $group);
   }
 
   /**
@@ -482,7 +482,7 @@ protected function assertTrue($value, $message = '', $group = 'Other') {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertFalse($value, $message = '', $group = 'Other') {
-    return $this->assert(!$value, $message ? $message : SafeMarkup::format('Value @value is FALSE.', array('@value' => var_export($value, TRUE))), $group);
+    return $this->assert(!$value, $message ? $message : SafeMarkup::format('Value @value is FALSE.', ['@value' => var_export($value, TRUE)]), $group);
   }
 
   /**
@@ -505,7 +505,7 @@ protected function assertFalse($value, $message = '', $group = 'Other') {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertNull($value, $message = '', $group = 'Other') {
-    return $this->assert(!isset($value), $message ? $message : SafeMarkup::format('Value @value is NULL.', array('@value' => var_export($value, TRUE))), $group);
+    return $this->assert(!isset($value), $message ? $message : SafeMarkup::format('Value @value is NULL.', ['@value' => var_export($value, TRUE)]), $group);
   }
 
   /**
@@ -528,7 +528,7 @@ protected function assertNull($value, $message = '', $group = 'Other') {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertNotNull($value, $message = '', $group = 'Other') {
-    return $this->assert(isset($value), $message ? $message : SafeMarkup::format('Value @value is not NULL.', array('@value' => var_export($value, TRUE))), $group);
+    return $this->assert(isset($value), $message ? $message : SafeMarkup::format('Value @value is not NULL.', ['@value' => var_export($value, TRUE)]), $group);
   }
 
   /**
@@ -560,7 +560,7 @@ protected function assertEqual($first, $second, $message = '', $group = 'Other')
     $second = $this->castSafeStrings($second);
     $is_equal = $first == $second;
     if (!$is_equal || !$message) {
-      $default_message = SafeMarkup::format('Value @first is equal to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE)));
+      $default_message = SafeMarkup::format('Value @first is equal to value @second.', ['@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE)]);
       $message = $message ? $message . PHP_EOL . $default_message : $default_message;
     }
     return $this->assert($is_equal, $message, $group);
@@ -595,7 +595,7 @@ protected function assertNotEqual($first, $second, $message = '', $group = 'Othe
     $second = $this->castSafeStrings($second);
     $not_equal = $first != $second;
     if (!$not_equal || !$message) {
-      $default_message = SafeMarkup::format('Value @first is not equal to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE)));
+      $default_message = SafeMarkup::format('Value @first is not equal to value @second.', ['@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE)]);
       $message = $message ? $message . PHP_EOL . $default_message : $default_message;
     }
     return $this->assert($not_equal, $message, $group);
@@ -625,7 +625,7 @@ protected function assertNotEqual($first, $second, $message = '', $group = 'Othe
   protected function assertIdentical($first, $second, $message = '', $group = 'Other') {
     $is_identical = $first === $second;
     if (!$is_identical || !$message) {
-      $default_message = SafeMarkup::format('Value @first is identical to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE)));
+      $default_message = SafeMarkup::format('Value @first is identical to value @second.', ['@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE)]);
       $message = $message ? $message . PHP_EOL . $default_message : $default_message;
     }
     return $this->assert($is_identical, $message, $group);
@@ -655,7 +655,7 @@ protected function assertIdentical($first, $second, $message = '', $group = 'Oth
   protected function assertNotIdentical($first, $second, $message = '', $group = 'Other') {
     $not_identical = $first !== $second;
     if (!$not_identical || !$message) {
-      $default_message = SafeMarkup::format('Value @first is not identical to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE)));
+      $default_message = SafeMarkup::format('Value @first is not identical to value @second.', ['@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE)]);
       $message = $message ? $message . PHP_EOL . $default_message : $default_message;
     }
     return $this->assert($not_identical, $message, $group);
@@ -683,10 +683,10 @@ protected function assertNotIdentical($first, $second, $message = '', $group = '
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertIdenticalObject($object1, $object2, $message = '', $group = 'Other') {
-    $message = $message ?: SafeMarkup::format('@object1 is identical to @object2', array(
+    $message = $message ?: SafeMarkup::format('@object1 is identical to @object2', [
       '@object1' => var_export($object1, TRUE),
       '@object2' => var_export($object2, TRUE),
-    ));
+    ]);
     $identical = TRUE;
     foreach ($object1 as $key => $value) {
       $identical = $identical && isset($object2->$key) && $object2->$key === $value;
@@ -858,14 +858,14 @@ protected function verbose($message) {
    *   taken into account, but it can be useful to only run a few selected test
    *   methods during debugging.
    */
-  public function run(array $methods = array()) {
+  public function run(array $methods = []) {
     $class = get_class($this);
 
     if ($missing_requirements = $this->checkRequirements()) {
       $object_info = new \ReflectionObject($this);
-      $caller = array(
+      $caller = [
         'file' => $object_info->getFileName(),
-      );
+      ];
       foreach ($missing_requirements as $missing_requirement) {
         TestBase::insertAssert($this->testId, $class, FALSE, $missing_requirement, 'Requirements check', $caller);
       }
@@ -903,7 +903,7 @@ public function run(array $methods = array()) {
     // compatibility.
     Handle::register();
 
-    set_error_handler(array($this, 'errorHandler'));
+    set_error_handler([$this, 'errorHandler']);
     // Iterate through all the methods in this class, unless a specific list of
     // methods to run was passed.
     $test_methods = array_filter(get_class_methods($class), function ($method) {
@@ -912,7 +912,7 @@ public function run(array $methods = array()) {
     if (empty($test_methods)) {
       // Call $this->assert() here because we need to pass along custom caller
       // information, lest the wrong originating code file/line be identified.
-      $this->assert(FALSE, 'No test methods found.', 'Requirements', array('function' => __METHOD__ . '()', 'file' => __FILE__, 'line' => __LINE__));
+      $this->assert(FALSE, 'No test methods found.', 'Requirements', ['function' => __METHOD__ . '()', 'file' => __FILE__, 'line' => __LINE__]);
     }
     if ($methods) {
       $test_methods = array_intersect($test_methods, $methods);
@@ -921,11 +921,11 @@ public function run(array $methods = array()) {
       // Insert a fail record. This will be deleted on completion to ensure
       // that testing completed.
       $method_info = new \ReflectionMethod($class, $method);
-      $caller = array(
+      $caller = [
         'file' => $method_info->getFileName(),
         'line' => $method_info->getStartLine(),
         'function' => $class . '->' . $method . '()',
-      );
+      ];
       $test_completion_check_id = TestBase::insertAssert($this->testId, $class, FALSE, 'The test did not complete due to a fatal error.', 'Completion check', $caller);
 
       try {
@@ -1014,7 +1014,7 @@ private function prepareDatabasePrefix() {
     // All assertions as well as the SimpleTest batch operations are associated
     // with the testId, so the database prefix has to be associated with it.
     $affected_rows = self::getDatabaseConnection()->update('simpletest_test_id')
-      ->fields(array('last_prefix' => $this->databasePrefix))
+      ->fields(['last_prefix' => $this->databasePrefix])
       ->condition('test_id', $this->testId)
       ->execute();
     if (!$affected_rows) {
@@ -1103,7 +1103,7 @@ private function prepareEnvironment() {
     // handlers defined by the original one.
     $callbacks = &drupal_register_shutdown_function();
     $this->originalShutdownCallbacks = $callbacks;
-    $callbacks = array();
+    $callbacks = [];
 
     // Create test directory ahead of installation so fatal errors and debug
     // information can be logged during installation process.
@@ -1153,11 +1153,11 @@ private function prepareEnvironment() {
     drupal_valid_test_ua($this->databasePrefix);
 
     // Reset settings.
-    new Settings(array(
+    new Settings([
       // For performance, simply use the database prefix as hash salt.
       'hash_salt' => $this->databasePrefix,
       'container_yamls' => [],
-    ));
+    ]);
 
     drupal_set_time_limit($this->timeLimit);
   }
@@ -1181,7 +1181,7 @@ protected function tearDown() {
    */
   private function restoreEnvironment() {
     // Destroy the session if one was started during the test-run.
-    $_SESSION = array();
+    $_SESSION = [];
     if (PHP_SAPI !== 'cli' && session_status() === PHP_SESSION_ACTIVE) {
       session_destroy();
       $params = session_get_cookie_params();
@@ -1197,7 +1197,7 @@ private function restoreEnvironment() {
     drupal_static_reset();
 
     if ($this->container && $this->container->has('state') && $state = $this->container->get('state')) {
-      $captured_emails = $state->get('system.test_mail_collector') ?: array();
+      $captured_emails = $state->get('system.test_mail_collector') ?: [];
       $emailCount = count($captured_emails);
       if ($emailCount) {
         $message = $emailCount == 1 ? '1 email was sent during this test.' : $emailCount . ' emails were sent during this test.';
@@ -1232,7 +1232,7 @@ private function restoreEnvironment() {
     \Drupal::setContainer($this->originalContainer);
 
     // Delete test site directory.
-    file_unmanaged_delete_recursive($this->siteDirectory, array($this, 'filePreDeleteCallback'));
+    file_unmanaged_delete_recursive($this->siteDirectory, [$this, 'filePreDeleteCallback']);
 
     // Restore original database connection.
     Database::removeConnection('default');
@@ -1278,7 +1278,7 @@ private function restoreEnvironment() {
    */
   public function errorHandler($severity, $message, $file = NULL, $line = NULL) {
     if ($severity & error_reporting()) {
-      $error_map = array(
+      $error_map = [
         E_STRICT => 'Run-time notice',
         E_WARNING => 'Warning',
         E_NOTICE => 'Notice',
@@ -1290,7 +1290,7 @@ public function errorHandler($severity, $message, $file = NULL, $line = NULL) {
         E_RECOVERABLE_ERROR => 'Recoverable error',
         E_DEPRECATED => 'Deprecated',
         E_USER_DEPRECATED => 'User deprecated',
-      );
+      ];
 
       $backtrace = debug_backtrace();
 
@@ -1315,15 +1315,15 @@ protected function exceptionHandler($exception) {
     $backtrace = $exception->getTrace();
     $verbose_backtrace = $backtrace;
     // Push on top of the backtrace the call that generated the exception.
-    array_unshift($backtrace, array(
+    array_unshift($backtrace, [
       'line' => $exception->getLine(),
       'file' => $exception->getFile(),
-    ));
+    ]);
     $decoded_exception = Error::decodeException($exception);
     unset($decoded_exception['backtrace']);
-    $message = SafeMarkup::format('%type: @message in %function (line %line of %file). <pre class="backtrace">@backtrace</pre>', $decoded_exception + array(
+    $message = SafeMarkup::format('%type: @message in %function (line %line of %file). <pre class="backtrace">@backtrace</pre>', $decoded_exception + [
       '@backtrace' => Error::formatBacktrace($verbose_backtrace),
-    ));
+    ]);
     $this->error($message, 'Uncaught exception', Error::getLastCaller($backtrace));
   }
 
@@ -1375,15 +1375,15 @@ protected function settingsSet($name, $value) {
    *   single value only.
    */
   public static function generatePermutations($parameters) {
-    $all_permutations = array(array());
+    $all_permutations = [[]];
     foreach ($parameters as $parameter => $values) {
-      $new_permutations = array();
+      $new_permutations = [];
       // Iterate over all values of the parameter.
       foreach ($values as $value) {
         // Iterate over all existing permutations.
         foreach ($all_permutations as $permutation) {
           // Add the new parameter value to existing permutations.
-          $new_permutations[] = $permutation + array($parameter => $value);
+          $new_permutations[] = $permutation + [$parameter => $value];
         }
       }
       // Replace the old permutations with the new permutations.
diff --git a/core/modules/simpletest/src/TestDiscovery.php b/core/modules/simpletest/src/TestDiscovery.php
index 02bf7071fbc6e46eef01109c3a105369d5011cc9..d5d7d8a5769015638ea11350808f390ff03f0c94 100644
--- a/core/modules/simpletest/src/TestDiscovery.php
+++ b/core/modules/simpletest/src/TestDiscovery.php
@@ -91,7 +91,7 @@ public function registerTestNamespaces() {
     if (isset($this->testNamespaces)) {
       return $this->testNamespaces;
     }
-    $this->testNamespaces = array();
+    $this->testNamespaces = [];
 
     $existing = $this->classLoader->getPrefixesPsr4();
 
@@ -101,7 +101,7 @@ public function registerTestNamespaces() {
     $this->testNamespaces['Drupal\\FunctionalTests\\'] = [$this->root . '/core/tests/Drupal/FunctionalTests'];
     $this->testNamespaces['Drupal\\FunctionalJavascriptTests\\'] = [$this->root . '/core/tests/Drupal/FunctionalJavascriptTests'];
 
-    $this->availableExtensions = array();
+    $this->availableExtensions = [];
     foreach ($this->getExtensions() as $name => $extension) {
       $this->availableExtensions[$extension->getType()][$name] = $name;
 
@@ -164,7 +164,7 @@ public function getTestClasses($extension = NULL, array $types = []) {
         return $cache->data;
       }
     }
-    $list = array();
+    $list = [];
 
     $classmap = $this->findAllClassFiles($extension);
 
@@ -238,7 +238,7 @@ public function getTestClasses($extension = NULL, array $types = []) {
    *   fully-qualified classnames to pathnames.
    */
   public function findAllClassFiles($extension = NULL) {
-    $classmap = array();
+    $classmap = [];
     $namespaces = $this->registerTestNamespaces();
     if (isset($extension)) {
       // Include tests in the \Drupal\Tests\{$extension} namespace.
@@ -294,7 +294,7 @@ public static function scanDirectory($namespace_prefix, $path) {
       return $current->isFile() && $current->getExtension() === 'php';
     });
     $files = new \RecursiveIteratorIterator($filter);
-    $classes = array();
+    $classes = [];
     foreach ($files as $fileinfo) {
       $class = $namespace_prefix;
       if ('' !== $subpath = $fileinfo->getSubPath()) {
@@ -332,10 +332,10 @@ public static function getTestInfo($classname, $doc_comment = NULL) {
       $reflection = new \ReflectionClass($classname);
       $doc_comment = $reflection->getDocComment();
     }
-    $info = array(
+    $info = [
       'name' => $classname,
-    );
-    $annotations = array();
+    ];
+    $annotations = [];
     // Look for annotations, allow an arbitrary amount of spaces before the
     // * but nothing else.
     preg_match_all('/^[ ]*\* \@([^\s]*) (.*$)/m', $doc_comment, $matches);
@@ -479,7 +479,7 @@ public static function getPhpunitTestSuite($classname) {
   protected function getExtensions() {
     $listing = new ExtensionDiscovery($this->root);
     // Ensure that tests in all profiles are discovered.
-    $listing->setProfileDirectories(array());
+    $listing->setProfileDirectories([]);
     $extensions = $listing->scan('module', TRUE);
     $extensions += $listing->scan('profile', TRUE);
     $extensions += $listing->scan('theme', TRUE);
diff --git a/core/modules/simpletest/src/Tests/BrokenSetUpTest.php b/core/modules/simpletest/src/Tests/BrokenSetUpTest.php
index e988f4d3da43377a93df384252a7e27b7030f599..673d5b9a8a0a022ce639c2dc9123667cdf573005 100644
--- a/core/modules/simpletest/src/Tests/BrokenSetUpTest.php
+++ b/core/modules/simpletest/src/Tests/BrokenSetUpTest.php
@@ -22,7 +22,7 @@ class BrokenSetUpTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('simpletest');
+  public static $modules = ['simpletest'];
 
   /**
    * The path to the shared trigger file.
@@ -39,7 +39,7 @@ protected function setUp() {
       $this->sharedTriggerFile = $this->publicFilesDirectory . '/trigger';
 
       // Create and log in user.
-      $admin_user = $this->drupalCreateUser(array('administer unit tests'));
+      $admin_user = $this->drupalCreateUser(['administer unit tests']);
       $this->drupalLogin($admin_user);
     }
     // If the test is being run from within simpletest, set up the broken test.
diff --git a/core/modules/simpletest/src/Tests/BrowserTest.php b/core/modules/simpletest/src/Tests/BrowserTest.php
index f98fe48c29b39f4df8cd96bd63c12359c8158c9d..be9e006978ed264ec6df80ed5a5bf86a8a9b408b 100644
--- a/core/modules/simpletest/src/Tests/BrowserTest.php
+++ b/core/modules/simpletest/src/Tests/BrowserTest.php
@@ -41,16 +41,16 @@ function testGetAbsoluteUrl() {
     $url = 'user/login';
 
     $this->drupalGet($url);
-    $absolute = \Drupal::url('user.login', array(), array('absolute' => TRUE));
+    $absolute = \Drupal::url('user.login', [], ['absolute' => TRUE]);
     $this->assertEqual($absolute, $this->url, 'Passed and requested URL are equal.');
     $this->assertEqual($this->url, $this->getAbsoluteUrl($this->url), 'Requested and returned absolute URL are equal.');
 
-    $this->drupalPostForm(NULL, array(), t('Log in'));
+    $this->drupalPostForm(NULL, [], t('Log in'));
     $this->assertEqual($absolute, $this->url, 'Passed and requested URL are equal.');
     $this->assertEqual($this->url, $this->getAbsoluteUrl($this->url), 'Requested and returned absolute URL are equal.');
 
     $this->clickLink('Create new account');
-    $absolute = \Drupal::url('user.register', array(), array('absolute' => TRUE));
+    $absolute = \Drupal::url('user.register', [], ['absolute' => TRUE]);
     $this->assertEqual($absolute, $this->url, 'Passed and requested URL are equal.');
     $this->assertEqual($this->url, $this->getAbsoluteUrl($this->url), 'Requested and returned absolute URL are equal.');
   }
@@ -72,16 +72,16 @@ function testXPathEscaping() {
     $this->setRawContent($testpage);
 
     // Matches the first link.
-    $urls = $this->xpath('//a[text()=:text]', array(':text' => 'A "weird" link, just to bother the dumb "XPath 1.0"'));
+    $urls = $this->xpath('//a[text()=:text]', [':text' => 'A "weird" link, just to bother the dumb "XPath 1.0"']);
     $this->assertEqual($urls[0]['href'], 'link1', 'Match with quotes.');
 
-    $urls = $this->xpath('//a[text()=:text]', array(':text' => 'A second "even more weird" link, in memory of George O\'Malley'));
+    $urls = $this->xpath('//a[text()=:text]', [':text' => 'A second "even more weird" link, in memory of George O\'Malley']);
     $this->assertEqual($urls[0]['href'], 'link2', 'Match with mixed single and double quotes.');
 
-    $urls = $this->xpath('//a[text()=:text]', array(':text' => 'A $third$ link, so weird it\'s worth $1 million'));
+    $urls = $this->xpath('//a[text()=:text]', [':text' => 'A $third$ link, so weird it\'s worth $1 million']);
     $this->assertEqual($urls[0]['href'], 'link3', 'Match with a regular expression back reference symbol (dollar sign).');
 
-    $urls = $this->xpath('//a[text()=:text]', array(':text' => 'A fourth link, containing alternative \\1 regex backreferences \\2'));
+    $urls = $this->xpath('//a[text()=:text]', [':text' => 'A fourth link, containing alternative \\1 regex backreferences \\2']);
     $this->assertEqual($urls[0]['href'], 'link4', 'Match with another regular expression back reference symbol (double backslash).');
   }
 
diff --git a/core/modules/simpletest/src/Tests/InstallationProfileModuleTestsTest.php b/core/modules/simpletest/src/Tests/InstallationProfileModuleTestsTest.php
index a1063e7b2f4236efa6c59d4e80e1d47112509b34..a4365f810e6a21ccfef890a83e68376844d3409c 100644
--- a/core/modules/simpletest/src/Tests/InstallationProfileModuleTestsTest.php
+++ b/core/modules/simpletest/src/Tests/InstallationProfileModuleTestsTest.php
@@ -16,7 +16,7 @@ class InstallationProfileModuleTestsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('simpletest');
+  public static $modules = ['simpletest'];
 
   /**
    * An administrative user with permission to adminsiter unit tests.
@@ -42,7 +42,7 @@ class InstallationProfileModuleTestsTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer unit tests'));
+    $this->adminUser = $this->drupalCreateUser(['administer unit tests']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -52,9 +52,9 @@ protected function setUp() {
   function testInstallationProfileTests() {
     $this->drupalGet('admin/config/development/testing');
     $this->assertText('Drupal\drupal_system_listing_compatible_test\Tests\SystemListingCompatibleTest');
-    $edit = array(
+    $edit = [
       'tests[Drupal\drupal_system_listing_compatible_test\Tests\SystemListingCompatibleTest]' => TRUE,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Run tests'));
     $this->assertText('SystemListingCompatibleTest test executed.');
   }
diff --git a/core/modules/simpletest/src/Tests/KernelTestBaseTest.php b/core/modules/simpletest/src/Tests/KernelTestBaseTest.php
index 472fdf9e45bc715cd387ea31f7dcc65f3634ee56..2ed63b3af40082ebfa03d18d64c6db3783501a1c 100644
--- a/core/modules/simpletest/src/Tests/KernelTestBaseTest.php
+++ b/core/modules/simpletest/src/Tests/KernelTestBaseTest.php
@@ -20,7 +20,7 @@ class KernelTestBaseTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test');
+  public static $modules = ['entity_test'];
 
   /**
    * {@inheritdoc}
@@ -51,7 +51,7 @@ function simpletest_test_stub_settings_function() {}
    * Tests expected behavior of setUp().
    */
   function testSetUp() {
-    $modules = array('entity_test');
+    $modules = ['entity_test'];
     $table = 'entity_test';
 
     // Verify that specified $modules have been loaded.
@@ -90,7 +90,7 @@ function testEnableModulesLoad() {
     $this->assertFalse(in_array($module, $list), "{$module}_entity_display_build_alter() in \Drupal::moduleHandler()->getImplementations() not found.");
 
     // Enable the module.
-    $this->enableModules(array($module));
+    $this->enableModules([$module]);
 
     // Verify that the module exists.
     $this->assertTrue(\Drupal::moduleHandler()->moduleExists($module), "$module module found.");
@@ -117,7 +117,7 @@ function testEnableModulesInstall() {
     $this->assertFalse(db_table_exists($table), "'$table' database table not found.");
 
     // Install the module.
-    \Drupal::service('module_installer')->install(array($module));
+    \Drupal::service('module_installer')->install([$module]);
 
     // Verify that the enabled module exists.
     $this->assertTrue(\Drupal::moduleHandler()->moduleExists($module), "$module module found.");
@@ -136,9 +136,9 @@ function testEnableModulesInstall() {
    */
   function testEnableModulesInstallContainer() {
     // Install Node module.
-    $this->enableModules(array('user', 'field', 'node'));
+    $this->enableModules(['user', 'field', 'node']);
 
-    $this->installEntitySchema('node', array('node', 'node_field_data'));
+    $this->installEntitySchema('node', ['node', 'node_field_data']);
     // Perform an entity query against node.
     $query = \Drupal::entityQuery('node');
     // Disable node access checks, since User module is not enabled.
@@ -190,7 +190,7 @@ function testInstallSchema() {
     $this->assertTrue($schema, "'$table' table schema found.");
 
     // Verify that the same table can be installed after enabling the module.
-    $this->enableModules(array($module));
+    $this->enableModules([$module]);
     $this->installSchema($module, $table);
     $this->assertTrue(db_table_exists($table), "'$table' database table found.");
     $schema = drupal_get_module_schema($module, $table);
@@ -203,7 +203,7 @@ function testInstallSchema() {
   function testInstallEntitySchema() {
     $entity = 'entity_test';
     // The entity_test Entity has a field that depends on the User module.
-    $this->enableModules(array('user'));
+    $this->enableModules(['user']);
     // Verity that the entity schema is created properly.
     $this->installEntitySchema($entity);
     $this->assertTrue(db_table_exists($entity), "'$entity' database table found.");
@@ -214,12 +214,12 @@ function testInstallEntitySchema() {
    */
   function testInstallConfig() {
     // The user module has configuration that depends on system.
-    $this->enableModules(array('system'));
+    $this->enableModules(['system']);
     $module = 'user';
 
     // Verify that default config can only be installed for enabled modules.
     try {
-      $this->installConfig(array($module));
+      $this->installConfig([$module]);
       $this->fail('Exception for non-enabled module found.');
     }
     catch (\Exception $e) {
@@ -228,8 +228,8 @@ function testInstallConfig() {
     $this->assertFalse($this->container->get('config.storage')->exists('user.settings'));
 
     // Verify that default config can be installed.
-    $this->enableModules(array('user'));
-    $this->installConfig(array('user'));
+    $this->enableModules(['user']);
+    $this->installConfig(['user']);
     $this->assertTrue($this->container->get('config.storage')->exists('user.settings'));
     $this->assertTrue($this->config('user.settings')->get('register'));
   }
@@ -239,7 +239,7 @@ function testInstallConfig() {
    */
   function testEnableModulesFixedList() {
     // Install system module.
-    $this->container->get('module_installer')->install(array('system', 'menu_link_content'));
+    $this->container->get('module_installer')->install(['system', 'menu_link_content']);
     $entity_manager = \Drupal::entityManager();
 
     // entity_test is loaded via $modules; its entity type should exist.
@@ -247,17 +247,17 @@ function testEnableModulesFixedList() {
     $this->assertTrue(TRUE == $entity_manager->getDefinition('entity_test'));
 
     // Load some additional modules; entity_test should still exist.
-    $this->enableModules(array('field', 'text', 'entity_test'));
+    $this->enableModules(['field', 'text', 'entity_test']);
     $this->assertEqual($this->container->get('module_handler')->moduleExists('entity_test'), TRUE);
     $this->assertTrue(TRUE == $entity_manager->getDefinition('entity_test'));
 
     // Install some other modules; entity_test should still exist.
-    $this->container->get('module_installer')->install(array('user', 'field', 'field_test'), FALSE);
+    $this->container->get('module_installer')->install(['user', 'field', 'field_test'], FALSE);
     $this->assertEqual($this->container->get('module_handler')->moduleExists('entity_test'), TRUE);
     $this->assertTrue(TRUE == $entity_manager->getDefinition('entity_test'));
 
     // Uninstall one of those modules; entity_test should still exist.
-    $this->container->get('module_installer')->uninstall(array('field_test'));
+    $this->container->get('module_installer')->uninstall(['field_test']);
     $this->assertEqual($this->container->get('module_handler')->moduleExists('entity_test'), TRUE);
     $this->assertTrue(TRUE == $entity_manager->getDefinition('entity_test'));
 
@@ -267,19 +267,19 @@ function testEnableModulesFixedList() {
     $this->assertTrue(TRUE == $entity_manager->getDefinition('entity_test'));
 
     // Reactivate the previously uninstalled module.
-    $this->enableModules(array('field_test'));
+    $this->enableModules(['field_test']);
 
     // Create a field.
-    $display = EntityViewDisplay::create(array(
+    $display = EntityViewDisplay::create([
       'targetEntityType' => 'entity_test',
       'bundle' => 'entity_test',
       'mode' => 'default',
-    ));
-    $field_storage = FieldStorageConfig::create(array(
+    ]);
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'test_field',
       'entity_type' => 'entity_test',
       'type' => 'test_field'
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -293,18 +293,18 @@ function testEnableModulesFixedList() {
   function testEnableModulesTheme() {
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
     $renderer = $this->container->get('renderer');
-    $original_element = $element = array(
+    $original_element = $element = [
       '#type' => 'container',
       '#markup' => 'Foo',
-      '#attributes' => array(),
-    );
-    $this->enableModules(array('system'));
+      '#attributes' => [],
+    ];
+    $this->enableModules(['system']);
     // \Drupal\Core\Theme\ThemeManager::render() throws an exception if modules
     // are not loaded yet.
     $this->assertTrue($renderer->renderRoot($element));
 
     $element = $original_element;
-    $this->disableModules(array('entity_test'));
+    $this->disableModules(['entity_test']);
     $this->assertTrue($renderer->renderRoot($element));
   }
 
@@ -313,10 +313,10 @@ function testEnableModulesTheme() {
    */
   function testNoThemeByDefault() {
     $themes = $this->config('core.extension')->get('theme');
-    $this->assertEqual($themes, array());
+    $this->assertEqual($themes, []);
 
     $extensions = $this->container->get('config.storage')->read('core.extension');
-    $this->assertEqual($extensions['theme'], array());
+    $this->assertEqual($extensions['theme'], []);
 
     $active_theme = $this->container->get('theme.manager')->getActiveTheme();
     $this->assertEqual($active_theme->getName(), 'core');
@@ -335,7 +335,7 @@ public function testDrupalGetProfile() {
   /**
    * {@inheritdoc}
    */
-  public function run(array $methods = array()) {
+  public function run(array $methods = []) {
     parent::run($methods);
 
     // Check that all tables of the test instance have been deleted. At this
@@ -357,11 +357,11 @@ public function run(array $methods = array()) {
         ':prefix' => $this->databasePrefix
       ]);
 
-      $result = $connection->query("SELECT name FROM " . $this->databasePrefix . ".sqlite_master WHERE type = :type AND name LIKE :table_name AND name NOT LIKE :pattern", array(
+      $result = $connection->query("SELECT name FROM " . $this->databasePrefix . ".sqlite_master WHERE type = :type AND name LIKE :table_name AND name NOT LIKE :pattern", [
         ':type' => 'table',
         ':table_name' => '%',
         ':pattern' => 'sqlite_%',
-      ))->fetchAllKeyed(0, 0);
+      ])->fetchAllKeyed(0, 0);
 
       $this->assertTrue(empty($result), 'All test tables have been removed.');
     }
diff --git a/core/modules/simpletest/src/Tests/MissingCheckedRequirementsTest.php b/core/modules/simpletest/src/Tests/MissingCheckedRequirementsTest.php
index 0b21d546dba92d0578359b2691c2cd17a0cd876d..d62cc48a3ea3220f371c7855d3058c071369f2c9 100644
--- a/core/modules/simpletest/src/Tests/MissingCheckedRequirementsTest.php
+++ b/core/modules/simpletest/src/Tests/MissingCheckedRequirementsTest.php
@@ -16,11 +16,11 @@ class MissingCheckedRequirementsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('simpletest');
+  public static $modules = ['simpletest'];
 
   protected function setUp() {
     parent::setUp();
-    $admin_user = $this->drupalCreateUser(array('administer unit tests'));
+    $admin_user = $this->drupalCreateUser(['administer unit tests']);
     $this->drupalLogin($admin_user);
   }
 
@@ -29,9 +29,9 @@ protected function setUp() {
    */
   protected function checkRequirements() {
     if ($this->isInChildSite()) {
-      return array(
+      return [
         'Test is not allowed to run.'
-      );
+      ];
     }
     return parent::checkRequirements();
   }
diff --git a/core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php b/core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php
index 3b2061ec4b319639c8006e0fe07673d88e98f59a..7e4f9125b2b8b4b5748cf4ca9b3e76eac6f2a03c 100644
--- a/core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php
+++ b/core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php
@@ -18,12 +18,12 @@ class SimpleTestBrowserTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('simpletest', 'test_page_test');
+  public static $modules = ['simpletest', 'test_page_test'];
 
   protected function setUp() {
     parent::setUp();
     // Create and log in an admin user.
-    $this->drupalLogin($this->drupalCreateUser(array('administer unit tests')));
+    $this->drupalLogin($this->drupalCreateUser(['administer unit tests']));
   }
 
   /**
@@ -33,9 +33,9 @@ public function testInternalBrowser() {
     // Retrieve the test page and check its title and headers.
     $this->drupalGet('test-page');
     $this->assertTrue($this->drupalGetHeader('Date'), 'An HTTP header was received.');
-    $this->assertTitle(t('Test page | @site-name', array(
+    $this->assertTitle(t('Test page | @site-name', [
       '@site-name' => $this->config('system.site')->get('name'),
-    )));
+    ]));
     $this->assertNoTitle('Foo');
 
     $old_user_id = $this->container->get('current_user')->id();
@@ -57,13 +57,13 @@ public function testInternalBrowser() {
 
     // Test the maximum redirection option.
     $this->maximumRedirects = 1;
-    $edit = array(
+    $edit = [
       'name' => $user->getUsername(),
       'pass' => $user->pass_raw
-    );
-    $this->drupalPostForm('user/login', $edit, t('Log in'), array(
-      'query' => array('destination' => 'user/logout'),
-    ));
+    ];
+    $this->drupalPostForm('user/login', $edit, t('Log in'), [
+      'query' => ['destination' => 'user/logout'],
+    ]);
     $headers = $this->drupalGetHeaders(TRUE);
     $this->assertEqual(count($headers), 2, 'Simpletest stopped following redirects after the first one.');
 
@@ -73,7 +73,7 @@ public function testInternalBrowser() {
     // @see drupal_valid_test_ua()
     // Not using File API; a potential error must trigger a PHP warning.
     unlink($this->siteDirectory . '/.htkey');
-    $this->drupalGet(Url::fromUri('base:core/install.php', array('external' => TRUE, 'absolute' => TRUE))->toString());
+    $this->drupalGet(Url::fromUri('base:core/install.php', ['external' => TRUE, 'absolute' => TRUE])->toString());
     $this->assertResponse(403, 'Cannot access install.php.');
   }
 
@@ -92,7 +92,7 @@ public function testUserAgentValidation() {
     // Generate a valid simpletest User-Agent to pass validation.
     $this->assertTrue(preg_match('/test\d+/', $this->databasePrefix, $matches), 'Database prefix contains test prefix.');
     $test_ua = drupal_generate_test_ua($matches[0]);
-    $this->additionalCurlOptions = array(CURLOPT_USERAGENT => $test_ua);
+    $this->additionalCurlOptions = [CURLOPT_USERAGENT => $test_ua];
 
     // Test pages only available for testing.
     $this->drupalGet($HTTP_path);
@@ -101,7 +101,7 @@ public function testUserAgentValidation() {
     $this->assertResponse(200, 'Requesting https.php with a legitimate simpletest User-Agent returns OK.');
 
     // Now slightly modify the HMAC on the header, which should not validate.
-    $this->additionalCurlOptions = array(CURLOPT_USERAGENT => $test_ua . 'X');
+    $this->additionalCurlOptions = [CURLOPT_USERAGENT => $test_ua . 'X'];
     $this->drupalGet($HTTP_path);
     $this->assertResponse(403, 'Requesting http.php with a bad simpletest User-Agent fails.');
     $this->drupalGet($https_path);
@@ -109,7 +109,7 @@ public function testUserAgentValidation() {
 
     // Use a real User-Agent and verify that the special files http.php and
     // https.php can't be accessed.
-    $this->additionalCurlOptions = array(CURLOPT_USERAGENT => 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12');
+    $this->additionalCurlOptions = [CURLOPT_USERAGENT => 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12'];
     $this->drupalGet($HTTP_path);
     $this->assertResponse(403, 'Requesting http.php with a normal User-Agent fails.');
     $this->drupalGet($https_path);
@@ -126,20 +126,20 @@ public function testTestingThroughUI() {
     // to be created. However this scenario is covered by the testception of
     // \Drupal\simpletest\Tests\SimpleTestTest.
 
-    $tests = array(
+    $tests = [
       // A KernelTestBase test.
       'Drupal\KernelTests\KernelTestBaseTest',
       // A PHPUnit unit test.
       'Drupal\Tests\action\Unit\Menu\ActionLocalTasksTest',
       // A PHPUnit functional test.
       ThroughUITest::class,
-    );
+    ];
 
     foreach ($tests as $test) {
       $this->drupalGet('admin/config/development/testing');
-      $edit = array(
+      $edit = [
         "tests[$test]" => TRUE,
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Run tests'));
       $this->assertText('0 fails, 0 exceptions');
     }
diff --git a/core/modules/simpletest/src/Tests/SimpleTestInstallBatchTest.php b/core/modules/simpletest/src/Tests/SimpleTestInstallBatchTest.php
index 72cb74c61514fea9ca6b93af1d5f51202e60965d..5663ad9cdc780d096688da3978aa23bdea267fe0 100644
--- a/core/modules/simpletest/src/Tests/SimpleTestInstallBatchTest.php
+++ b/core/modules/simpletest/src/Tests/SimpleTestInstallBatchTest.php
@@ -20,7 +20,7 @@ class SimpleTestInstallBatchTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('simpletest', 'simpletest_test', 'entity_test');
+  public static $modules = ['simpletest', 'simpletest_test', 'entity_test'];
 
   /**
    * Tests loading entities created in a batch in simpletest_test_install().
diff --git a/core/modules/simpletest/src/Tests/SimpleTestTest.php b/core/modules/simpletest/src/Tests/SimpleTestTest.php
index ff20f5e9680f611265581d29848902cb957be2c6..d1f2a20cfda657f1b4221d813bb728b2d56e7bd8 100644
--- a/core/modules/simpletest/src/Tests/SimpleTestTest.php
+++ b/core/modules/simpletest/src/Tests/SimpleTestTest.php
@@ -34,7 +34,7 @@ class SimpleTestTest extends WebTestBase {
    *
    * Used to ensure they are incrementing.
    */
-  protected $testIds = array();
+  protected $testIds = [];
 
   /**
    * Translated fail message.
@@ -97,12 +97,12 @@ class: Drupal\Core\Cache\MemoryBackendFactory
       parent::setUp();
       $this->assertNotIdentical(\Drupal::getContainer(), $original_container, 'WebTestBase test creates a new container.');
       // Create and log in an admin user.
-      $this->drupalLogin($this->drupalCreateUser(array('administer unit tests')));
+      $this->drupalLogin($this->drupalCreateUser(['administer unit tests']));
     }
     else {
       // This causes three of the five fails that are asserted in
       // confirmStubResults().
-      self::$modules = array('non_existent_module');
+      self::$modules = ['non_existent_module'];
       parent::setUp();
     }
   }
@@ -127,7 +127,7 @@ function testWebTestRunner() {
         // Run this test from web interface.
         $this->drupalGet('admin/config/development/testing');
 
-        $edit = array();
+        $edit = [];
         $edit['tests[Drupal\simpletest\Tests\SimpleTestTest]'] = TRUE;
         $this->drupalPostForm(NULL, $edit, t('Run tests'));
 
@@ -192,10 +192,10 @@ function stubTest() {
 
     // This causes the third to fifth of the sixteen passes asserted in
     // confirmStubResults().
-    $user = $this->drupalCreateUser(array($this->validPermission), 'SimpleTestTest');
+    $user = $this->drupalCreateUser([$this->validPermission], 'SimpleTestTest');
 
     // This causes the fifth of the five fails asserted in confirmStubResults().
-    $this->drupalCreateUser(array($this->invalidPermission));
+    $this->drupalCreateUser([$this->invalidPermission]);
 
     // Test logging in as a user.
     // This causes the sixth to tenth of the sixteen passes asserted in
@@ -204,7 +204,7 @@ function stubTest() {
 
     // This causes the eleventh of the sixteen passes asserted in
     // confirmStubResults().
-    $this->pass(t('Test ID is @id.', array('@id' => $this->testId)));
+    $this->pass(t('Test ID is @id.', ['@id' => $this->testId]));
 
     // These cause the twelfth to fifteenth of the sixteen passes asserted in
     // confirmStubResults().
@@ -240,13 +240,13 @@ function assertNothing() {
    * Confirm that the stub test produced the desired results.
    */
   function confirmStubTestResults() {
-    $this->assertAssertion(t('Unable to install modules %modules due to missing modules %missing.', array('%modules' => 'non_existent_module', '%missing' => 'non_existent_module')), 'Other', 'Fail', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->setUp()');
+    $this->assertAssertion(t('Unable to install modules %modules due to missing modules %missing.', ['%modules' => 'non_existent_module', '%missing' => 'non_existent_module']), 'Other', 'Fail', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->setUp()');
 
     $this->assertAssertion($this->passMessage, 'Other', 'Pass', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->stubTest()');
     $this->assertAssertion($this->failMessage, 'Other', 'Fail', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->stubTest()');
 
-    $this->assertAssertion(t('Created permissions: @perms', array('@perms' => $this->validPermission)), 'Role', 'Pass', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->stubTest()');
-    $this->assertAssertion(t('Invalid permission %permission.', array('%permission' => $this->invalidPermission)), 'Role', 'Fail', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->stubTest()');
+    $this->assertAssertion(t('Created permissions: @perms', ['@perms' => $this->validPermission]), 'Role', 'Pass', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->stubTest()');
+    $this->assertAssertion(t('Invalid permission %permission.', ['%permission' => $this->invalidPermission]), 'Role', 'Fail', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->stubTest()');
 
     // Check that the user was logged in successfully.
     $this->assertAssertion('User SimpleTestTest successfully logged in.', 'User login', 'Pass', 'SimpleTestTest.php', 'Drupal\simpletest\Tests\SimpleTestTest->stubTest()');
@@ -312,24 +312,24 @@ function assertAssertion($message, $type, $status, $file, $function) {
         break;
       }
     }
-    return $this->assertTrue($found, format_string('Found assertion {"@message", "@type", "@status", "@file", "@function"}.', array('@message' => $message, '@type' => $type, '@status' => $status, "@file" => $file, "@function" => $function)));
+    return $this->assertTrue($found, format_string('Found assertion {"@message", "@type", "@status", "@file", "@function"}.', ['@message' => $message, '@type' => $type, '@status' => $status, "@file" => $file, "@function" => $function]));
   }
 
   /**
    * Get the results from a test and store them in the class array $results.
    */
   function getTestResults() {
-    $results = array();
+    $results = [];
     if ($this->parse()) {
       if ($details = $this->getResultFieldSet()) {
         // Code assumes this is the only test in group.
         $results['summary'] = $this->asText($details->div->div[1]);
         $results['name'] = $this->asText($details->summary);
 
-        $results['assertions'] = array();
+        $results['assertions'] = [];
         $tbody = $details->div->table->tbody;
         foreach ($tbody->tr as $row) {
-          $assertion = array();
+          $assertion = [];
           $assertion['message'] = $this->asText($row->td[0]);
           $assertion['type'] = $this->asText($row->td[1]);
           $assertion['file'] = $this->asText($row->td[2]);
diff --git a/core/modules/simpletest/src/UserCreationTrait.php b/core/modules/simpletest/src/UserCreationTrait.php
index f6665b4c022d5b8c1eae4f67775edee4ca5012a7..4b4d0ec95667ca53da04c0b816bec74f6d81d791 100644
--- a/core/modules/simpletest/src/UserCreationTrait.php
+++ b/core/modules/simpletest/src/UserCreationTrait.php
@@ -43,7 +43,7 @@ protected function setCurrentUser(AccountInterface $account) {
    *   A fully loaded user object with pass_raw property, or FALSE if account
    *   creation fails.
    */
-  protected function createUser(array $permissions = array(), $name = NULL, $admin = FALSE) {
+  protected function createUser(array $permissions = [], $name = NULL, $admin = FALSE) {
     // Create a role with the given permission set, if any.
     $rid = FALSE;
     if ($permissions) {
@@ -54,13 +54,13 @@ protected function createUser(array $permissions = array(), $name = NULL, $admin
     }
 
     // Create a user assigned to that role.
-    $edit = array();
+    $edit = [];
     $edit['name'] = !empty($name) ? $name : $this->randomMachineName();
     $edit['mail'] = $edit['name'] . '@example.com';
     $edit['pass'] = user_password();
     $edit['status'] = 1;
     if ($rid) {
-      $edit['roles'] = array($rid);
+      $edit['roles'] = [$rid];
     }
 
     if ($admin) {
@@ -70,7 +70,7 @@ protected function createUser(array $permissions = array(), $name = NULL, $admin
     $account = User::create($edit);
     $account->save();
 
-    $this->assertTrue($account->id(), SafeMarkup::format('User created with name %name and pass %pass', array('%name' => $edit['name'], '%pass' => $edit['pass'])), 'User login');
+    $this->assertTrue($account->id(), SafeMarkup::format('User created with name %name and pass %pass', ['%name' => $edit['name'], '%pass' => $edit['pass']]), 'User login');
     if (!$account->id()) {
       return FALSE;
     }
@@ -141,19 +141,19 @@ protected function createRole(array $permissions, $rid = NULL, $name = NULL, $we
     }
 
     // Create new role.
-    $role = Role::create(array(
+    $role = Role::create([
       'id' => $rid,
       'label' => $name,
-    ));
+    ]);
     if (isset($weight)) {
       $role->set('weight', $weight);
     }
     $result = $role->save();
 
-    $this->assertIdentical($result, SAVED_NEW, SafeMarkup::format('Created role ID @rid with name @name.', array(
+    $this->assertIdentical($result, SAVED_NEW, SafeMarkup::format('Created role ID @rid with name @name.', [
       '@name' => var_export($role->label(), TRUE),
       '@rid' => var_export($role->id(), TRUE),
-    )), 'Role');
+    ]), 'Role');
 
     if ($result === SAVED_NEW) {
       // Grant the specified permissions to the role, if any.
@@ -162,10 +162,10 @@ protected function createRole(array $permissions, $rid = NULL, $name = NULL, $we
         $assigned_permissions = Role::load($role->id())->getPermissions();
         $missing_permissions = array_diff($permissions, $assigned_permissions);
         if (!$missing_permissions) {
-          $this->pass(SafeMarkup::format('Created permissions: @perms', array('@perms' => implode(', ', $permissions))), 'Role');
+          $this->pass(SafeMarkup::format('Created permissions: @perms', ['@perms' => implode(', ', $permissions)]), 'Role');
         }
         else {
-          $this->fail(SafeMarkup::format('Failed to create permissions: @perms', array('@perms' => implode(', ', $missing_permissions))), 'Role');
+          $this->fail(SafeMarkup::format('Failed to create permissions: @perms', ['@perms' => implode(', ', $missing_permissions)]), 'Role');
         }
       }
       return $role->id();
@@ -189,7 +189,7 @@ protected function checkPermissions(array $permissions) {
     $valid = TRUE;
     foreach ($permissions as $permission) {
       if (!in_array($permission, $available)) {
-        $this->fail(SafeMarkup::format('Invalid permission %permission.', array('%permission' => $permission)), 'Role');
+        $this->fail(SafeMarkup::format('Invalid permission %permission.', ['%permission' => $permission]), 'Role');
         $valid = FALSE;
       }
     }
diff --git a/core/modules/simpletest/src/WebTestBase.php b/core/modules/simpletest/src/WebTestBase.php
index 6ff76aee613237f63260b468f4c974ba4da584f5..b1a0258b5718206721901efe0a38856907010754 100644
--- a/core/modules/simpletest/src/WebTestBase.php
+++ b/core/modules/simpletest/src/WebTestBase.php
@@ -100,7 +100,7 @@ abstract class WebTestBase extends TestBase {
    *
    * @var array
    */
-  protected $cookies = array();
+  protected $cookies = [];
 
   /**
    * Indicates that headers should be dumped if verbose output is enabled.
@@ -133,7 +133,7 @@ abstract class WebTestBase extends TestBase {
    * \Drupal\simpletest\WebTestBase itself never sets this but always obeys what
    * is set.
    */
-  protected $additionalCurlOptions = array();
+  protected $additionalCurlOptions = [];
 
   /**
    * The original batch, before it was changed for testing purposes.
@@ -154,7 +154,7 @@ abstract class WebTestBase extends TestBase {
    *
    * @var array
    */
-  protected $originalShutdownCallbacks = array();
+  protected $originalShutdownCallbacks = [];
 
   /**
    * The current session ID, if available.
@@ -191,7 +191,7 @@ abstract class WebTestBase extends TestBase {
    *
    * @var array
    */
-  protected $curlCookies = array();
+  protected $curlCookies = [];
 
   /**
    * An array of custom translations suitable for drupal_rewrite_settings().
@@ -259,7 +259,7 @@ protected function drupalBuildEntityView(EntityInterface $entity, $view_mode = '
 
     $render_controller = $this->container->get('entity.manager')->getViewBuilder($entity->getEntityTypeId());
     if ($reset) {
-      $render_controller->resetCache(array($entity->id()));
+      $render_controller->resetCache([$entity->id()]);
     }
     $build = $render_controller->view($entity, $view_mode, $langcode);
     $ensure_fully_built($build);
@@ -275,7 +275,7 @@ protected function drupalBuildEntityView(EntityInterface $entity, $view_mode = '
    */
   protected function assertBlockAppears(Block $block) {
     $result = $this->findBlockInstance($block);
-    $this->assertTrue(!empty($result), format_string('Ensure the block @id appears on the page', array('@id' => $block->id())));
+    $this->assertTrue(!empty($result), format_string('Ensure the block @id appears on the page', ['@id' => $block->id()]));
   }
 
   /**
@@ -286,7 +286,7 @@ protected function assertBlockAppears(Block $block) {
    */
   protected function assertNoBlockAppears(Block $block) {
     $result = $this->findBlockInstance($block);
-    $this->assertFalse(!empty($result), format_string('Ensure the block @id does not appear on the page', array('@id' => $block->id())));
+    $this->assertFalse(!empty($result), format_string('Ensure the block @id does not appear on the page', ['@id' => $block->id()]));
   }
 
   /**
@@ -299,7 +299,7 @@ protected function assertNoBlockAppears(Block $block) {
    *   The result from the xpath query.
    */
   protected function findBlockInstance(Block $block) {
-    return $this->xpath('//div[@id = :id]', array(':id' => 'block-' . $block->id()));
+    return $this->xpath('//div[@id = :id]', [':id' => 'block-' . $block->id()]);
   }
 
   /**
@@ -334,17 +334,17 @@ protected function drupalLogin(AccountInterface $account) {
       $this->drupalLogout();
     }
 
-    $edit = array(
+    $edit = [
       'name' => $account->getUsername(),
       'pass' => $account->pass_raw
-    );
+    ];
     $this->drupalPostForm('user/login', $edit, t('Log in'));
 
     // @see WebTestBase::drupalUserIsLoggedIn()
     if (isset($this->sessionId)) {
       $account->session_id = $this->sessionId;
     }
-    $pass = $this->assert($this->drupalUserIsLoggedIn($account), format_string('User %name successfully logged in.', array('%name' => $account->getUsername())), 'User login');
+    $pass = $this->assert($this->drupalUserIsLoggedIn($account), format_string('User %name successfully logged in.', ['%name' => $account->getUsername()]), 'User login');
     if ($pass) {
       $this->loggedInUser = $account;
       $this->container->get('current_user')->setAccount($account);
@@ -377,7 +377,7 @@ protected function drupalLogout() {
     // Make a request to the logout page, and redirect to the user page, the
     // idea being if you were properly logged out you should be seeing a login
     // screen.
-    $this->drupalGet('user/logout', array('query' => array('destination' => 'user/login')));
+    $this->drupalGet('user/logout', ['query' => ['destination' => 'user/login']]);
     $this->assertResponse(200, 'User was logged out.');
     $pass = $this->assertField('name', 'Username field found.', 'Logout');
     $pass = $pass && $this->assertField('pass', 'Password field found.', 'Logout');
@@ -469,36 +469,36 @@ protected function installParameters() {
       unset($connection_info['default']['host']);
       unset($connection_info['default']['port']);
     }
-    $parameters = array(
+    $parameters = [
       'interactive' => FALSE,
-      'parameters' => array(
+      'parameters' => [
         'profile' => $this->profile,
         'langcode' => 'en',
-      ),
-      'forms' => array(
-        'install_settings_form' => array(
+      ],
+      'forms' => [
+        'install_settings_form' => [
           'driver' => $driver,
           $driver => $connection_info['default'],
-        ),
-        'install_configure_form' => array(
+        ],
+        'install_configure_form' => [
           'site_name' => 'Drupal',
           'site_mail' => 'simpletest@example.com',
-          'account' => array(
+          'account' => [
             'name' => $this->rootUser->name,
             'mail' => $this->rootUser->getEmail(),
-            'pass' => array(
+            'pass' => [
               'pass1' => $this->rootUser->pass_raw,
               'pass2' => $this->rootUser->pass_raw,
-            ),
-          ),
+            ],
+          ],
           // \Drupal\Core\Render\Element\Checkboxes::valueCallback() requires
           // NULL instead of FALSE values for programmatic form submissions to
           // disable a checkbox.
           'enable_update_status_module' => NULL,
           'enable_update_status_emails' => NULL,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     // If we only have one db driver available, we cannot set the driver.
     include_once DRUPAL_ROOT . '/core/includes/install.inc';
@@ -574,7 +574,7 @@ protected function addCustomTranslations($langcode, array $values) {
     // If $values is empty, then the test expects all custom translations to be
     // cleared.
     if (empty($values)) {
-      $this->customTranslations[$langcode] = array();
+      $this->customTranslations[$langcode] = [];
     }
     // Otherwise, $values are expected to be merged into previously passed
     // values, while retaining keys that are not explicitly set.
@@ -594,17 +594,17 @@ protected function addCustomTranslations($langcode, array $values) {
    * calling this method.
    */
   protected function writeCustomTranslations() {
-    $settings = array();
+    $settings = [];
     foreach ($this->customTranslations as $langcode => $values) {
       $settings_key = 'locale_custom_strings_' . $langcode;
 
       // Update in-memory settings directly.
       $this->settingsSet($settings_key, $values);
 
-      $settings['settings'][$settings_key] = (object) array(
+      $settings['settings'][$settings_key] = (object) [
         'value' => $values,
         'required' => TRUE,
-      );
+      ];
     }
     // Only rewrite settings if there are any translation changes to write.
     if (!empty($settings)) {
@@ -630,13 +630,13 @@ protected function tearDown() {
 
     // Ensure that internal logged in variable and cURL options are reset.
     $this->loggedInUser = FALSE;
-    $this->additionalCurlOptions = array();
+    $this->additionalCurlOptions = [];
 
     // Close the CURL handler and reset the cookies array used for upgrade
     // testing so test classes containing multiple tests are not polluted.
     $this->curlClose();
-    $this->curlCookies = array();
-    $this->cookies = array();
+    $this->curlCookies = [];
+    $this->cookies = [];
   }
 
   /**
@@ -659,7 +659,7 @@ protected function curlInitialize() {
         $this->cookieFile = $this->publicFilesDirectory . '/cookie.jar';
       }
 
-      $curl_options = array(
+      $curl_options = [
         CURLOPT_COOKIEJAR => $this->cookieFile,
         CURLOPT_URL => $base_url,
         CURLOPT_FOLLOWLOCATION => FALSE,
@@ -668,11 +668,11 @@ protected function curlInitialize() {
         CURLOPT_SSL_VERIFYPEER => FALSE,
         // Required to make the tests run on HTTPS.
         CURLOPT_SSL_VERIFYHOST => FALSE,
-        CURLOPT_HEADERFUNCTION => array(&$this, 'curlHeaderCallback'),
+        CURLOPT_HEADERFUNCTION => [&$this, 'curlHeaderCallback'],
         CURLOPT_USERAGENT => $this->databasePrefix,
         // Disable support for the @ prefix for uploading files.
         CURLOPT_SAFE_UPLOAD => TRUE,
-      );
+      ];
       if (isset($this->httpAuthCredentials)) {
         $curl_options[CURLOPT_HTTPAUTH] = $this->httpAuthMethod;
         $curl_options[CURLOPT_USERPWD] = $this->httpAuthCredentials;
@@ -731,7 +731,7 @@ protected function curlExec($curl_options, $redirect = FALSE) {
       $curl_options[CURLOPT_HTTPHEADER][] = 'Expect:';
     }
 
-    $cookies = array();
+    $cookies = [];
     if (!empty($this->curlCookies)) {
       $cookies = $this->curlCookies;
     }
@@ -744,9 +744,9 @@ protected function curlExec($curl_options, $redirect = FALSE) {
 
     // Merge additional cookies in.
     if (!empty($cookies)) {
-      $curl_options += array(
+      $curl_options += [
         CURLOPT_COOKIE => '',
-      );
+      ];
       // Ensure any existing cookie data string ends with the correct separator.
       if (!empty($curl_options[CURLOPT_COOKIE])) {
         $curl_options[CURLOPT_COOKIE] = rtrim($curl_options[CURLOPT_COOKIE], '; ') . '; ';
@@ -759,7 +759,7 @@ protected function curlExec($curl_options, $redirect = FALSE) {
     if (!$redirect) {
       // Reset headers, the session ID and the redirect counter.
       $this->sessionId = NULL;
-      $this->headers = array();
+      $this->headers = [];
       $this->redirectCount = 0;
     }
 
@@ -771,10 +771,10 @@ protected function curlExec($curl_options, $redirect = FALSE) {
     // to prevent fragments being sent to the web server as part
     // of the request.
     // TODO: Remove this for Drupal 8, since fixed in curl 7.20.0.
-    if (in_array($status, array(300, 301, 302, 303, 305, 307)) && $this->redirectCount < $this->maximumRedirects) {
+    if (in_array($status, [300, 301, 302, 303, 305, 307]) && $this->redirectCount < $this->maximumRedirects) {
       if ($this->drupalGetHeader('location')) {
         $this->redirectCount++;
-        $curl_options = array();
+        $curl_options = [];
         $curl_options[CURLOPT_URL] = $this->drupalGetHeader('location');
         $curl_options[CURLOPT_HTTPGET] = TRUE;
         return $this->curlExec($curl_options, TRUE);
@@ -784,12 +784,12 @@ protected function curlExec($curl_options, $redirect = FALSE) {
     $this->setRawContent($content);
     $this->url = isset($original_url) ? $original_url : curl_getinfo($this->curlHandle, CURLINFO_EFFECTIVE_URL);
 
-    $message_vars = array(
+    $message_vars = [
       '@method' => !empty($curl_options[CURLOPT_NOBODY]) ? 'HEAD' : (empty($curl_options[CURLOPT_POSTFIELDS]) ? 'GET' : 'POST'),
       '@url' => isset($original_url) ? $original_url : $url,
       '@status' => $status,
       '@length' => format_size(strlen($this->getRawContent()))
-    );
+    ];
     $message = SafeMarkup::format('@method @url returned @status (@length).', $message_vars);
     $this->assertTrue($this->getRawContent() !== FALSE, $message, 'Browser');
     return $this->getRawContent();
@@ -823,7 +823,7 @@ protected function curlHeaderCallback($curlHandler, $header) {
     if (preg_match('/^X-Drupal-Assertion-[0-9]+: (.*)$/', $header, $matches)) {
       // Call \Drupal\simpletest\WebTestBase::error() with the parameters from
       // the header.
-      call_user_func_array(array(&$this, 'error'), unserialize(urldecode($matches[1])));
+      call_user_func_array([&$this, 'error'], unserialize(urldecode($matches[1])));
     }
 
     // Save cookies.
@@ -831,7 +831,7 @@ protected function curlHeaderCallback($curlHandler, $header) {
       $name = $matches[1];
       $parts = array_map('trim', explode(';', $matches[2]));
       $value = array_shift($parts);
-      $this->cookies[$name] = array('value' => $value, 'secure' => in_array('secure', $parts));
+      $this->cookies[$name] = ['value' => $value, 'secure' => in_array('secure', $parts)];
       if ($name === $this->getSessionName()) {
         if ($value != 'deleted') {
           $this->sessionId = $value;
@@ -885,11 +885,11 @@ protected function isInChildSite() {
    * @return string
    *   The retrieved HTML string, also available as $this->getRawContent()
    */
-  protected function drupalGet($path, array $options = array(), array $headers = array()) {
+  protected function drupalGet($path, array $options = [], array $headers = []) {
     // We re-using a CURL connection here. If that connection still has certain
     // options set, it might change the GET into a POST. Make sure we clear out
     // previous options.
-    $out = $this->curlExec(array(CURLOPT_HTTPGET => TRUE, CURLOPT_URL => $this->buildUrl($path, $options), CURLOPT_NOBODY => FALSE, CURLOPT_HTTPHEADER => $headers));
+    $out = $this->curlExec([CURLOPT_HTTPGET => TRUE, CURLOPT_URL => $this->buildUrl($path, $options), CURLOPT_NOBODY => FALSE, CURLOPT_HTTPHEADER => $headers]);
     // Ensure that any changes to variables in the other thread are picked up.
     $this->refreshVariables();
 
@@ -928,7 +928,7 @@ protected function drupalGet($path, array $options = array(), array $headers = a
    * @return array
    *   Decoded json.
    */
-  protected function drupalGetJSON($path, array $options = array(), array $headers = array()) {
+  protected function drupalGetJSON($path, array $options = [], array $headers = []) {
     return Json::decode($this->drupalGetWithFormat($path, 'json', $options, $headers));
   }
 
@@ -965,7 +965,7 @@ protected function drupalGetWithFormat($path, $format, array $options = [], arra
    * @return array
    *   Decoded JSON.
    */
-  protected function drupalGetAjax($path, array $options = array(), array $headers = array()) {
+  protected function drupalGetAjax($path, array $options = [], array $headers = []) {
     if (!isset($options['query'][MainContentViewSubscriber::WRAPPER_FORMAT])) {
       $options['query'][MainContentViewSubscriber::WRAPPER_FORMAT] = 'drupal_ajax';
     }
@@ -985,7 +985,7 @@ protected function drupalGetAjax($path, array $options = array(), array $headers
    * @return string
    *   The retrieved content.
    */
-  protected function drupalGetXHR($path, array $options = array(), array $headers = array()) {
+  protected function drupalGetXHR($path, array $options = [], array $headers = []) {
     $headers[] = 'X-Requested-With: XMLHttpRequest';
     return $this->drupalGet($path, $options, $headers);
   }
@@ -1074,7 +1074,7 @@ protected function drupalGetXHR($path, array $options = array(), array $headers
    *   POST data, so it must already be urlencoded and contain a leading "&"
    *   (e.g., "&extra_var1=hello+world&extra_var2=you%26me").
    */
-  protected function drupalPostForm($path, $edit, $submit, array $options = array(), array $headers = array(), $form_html_id = NULL, $extra_post = NULL) {
+  protected function drupalPostForm($path, $edit, $submit, array $options = [], array $headers = [], $form_html_id = NULL, $extra_post = NULL) {
     if (is_object($submit)) {
       // Cast MarkupInterface objects to string.
       $submit = (string) $submit;
@@ -1100,8 +1100,8 @@ protected function drupalPostForm($path, $edit, $submit, array $options = array(
       foreach ($forms as $form) {
         // We try to set the fields of this form as specified in $edit.
         $edit = $edit_save;
-        $post = array();
-        $upload = array();
+        $post = [];
+        $upload = [];
         $submit_matches = $this->handleForm($post, $edit, $upload, $ajax ? NULL : $submit, $form);
         $action = isset($form['action']) ? $this->getAbsoluteUrl((string) $form['action']) : $this->getUrl();
         if ($ajax) {
@@ -1141,7 +1141,7 @@ protected function drupalPostForm($path, $edit, $submit, array $options = array(
           else {
             $post = $this->serializePostValues($post) . $extra_post;
           }
-          $out = $this->curlExec(array(CURLOPT_URL => $action, CURLOPT_POST => TRUE, CURLOPT_POSTFIELDS => $post, CURLOPT_HTTPHEADER => $headers));
+          $out = $this->curlExec([CURLOPT_URL => $action, CURLOPT_POST => TRUE, CURLOPT_POSTFIELDS => $post, CURLOPT_HTTPHEADER => $headers]);
           // Ensure that any changes to variables in the other thread are picked
           // up.
           $this->refreshVariables();
@@ -1169,12 +1169,12 @@ protected function drupalPostForm($path, $edit, $submit, array $options = array(
       }
       // We have not found a form which contained all fields of $edit.
       foreach ($edit as $name => $value) {
-        $this->fail(SafeMarkup::format('Failed to set field @name to @value', array('@name' => $name, '@value' => $value)));
+        $this->fail(SafeMarkup::format('Failed to set field @name to @value', ['@name' => $name, '@value' => $value]));
       }
       if (!$ajax && isset($submit)) {
-        $this->assertTrue($submit_matches, format_string('Found the @submit button', array('@submit' => $submit)));
+        $this->assertTrue($submit_matches, format_string('Found the @submit button', ['@submit' => $submit]));
       }
-      $this->fail(format_string('Found the requested form fields at @path', array('@path' => ($path instanceof Url) ? $path->toString() : $path)));
+      $this->fail(format_string('Found the requested form fields at @path', ['@path' => ($path instanceof Url) ? $path->toString() : $path]));
     }
   }
 
@@ -1220,7 +1220,7 @@ protected function drupalPostForm($path, $edit, $submit, array $options = array(
    * @see drupalProcessAjaxResponse()
    * @see ajax.js
    */
-  protected function drupalPostAjaxForm($path, $edit, $triggering_element, $ajax_path = NULL, array $options = array(), array $headers = array(), $form_html_id = NULL, $ajax_settings = NULL) {
+  protected function drupalPostAjaxForm($path, $edit, $triggering_element, $ajax_path = NULL, array $options = [], array $headers = [], $form_html_id = NULL, $ajax_settings = NULL) {
 
     // Get the content of the initial page prior to calling drupalPostForm(),
     // since drupalPostForm() replaces $this->content.
@@ -1257,7 +1257,7 @@ protected function drupalPostAjaxForm($path, $edit, $triggering_element, $ajax_p
     }
 
     // Add extra information to the POST data as ajax.js does.
-    $extra_post = array();
+    $extra_post = [];
     if (isset($ajax_settings['submit'])) {
       foreach ($ajax_settings['submit'] as $key => $value) {
         $extra_post[$key] = $value;
@@ -1295,7 +1295,7 @@ protected function drupalPostAjaxForm($path, $edit, $triggering_element, $ajax_p
     $ajax_path = $this->container->get('unrouted_url_assembler')->assemble('base://' . $ajax_path, $options);
 
     // Submit the POST request.
-    $return = Json::decode($this->drupalPostForm(NULL, $edit, array('path' => $ajax_path, 'triggering_element' => $triggering_element), $options, $headers, $form_html_id, $extra_post));
+    $return = Json::decode($this->drupalPostForm(NULL, $edit, ['path' => $ajax_path, 'triggering_element' => $triggering_element], $options, $headers, $form_html_id, $extra_post));
     if ($this->assertAjaxHeader) {
       $this->assertIdentical($this->drupalGetHeader('X-Drupal-Ajax-Token'), '1', 'Ajax response header found.');
     }
@@ -1341,9 +1341,9 @@ protected function drupalProcessAjaxResponse($content, array $ajax_response, arr
 
     // ajax.js applies some defaults to the settings object, so do the same
     // for what's used by this function.
-    $ajax_settings += array(
+    $ajax_settings += [
       'method' => 'replaceWith',
-    );
+    ];
     // DOM can load HTML soup. But, HTML soup can throw warnings, suppress
     // them.
     $dom = new \DOMDocument();
@@ -1370,7 +1370,7 @@ protected function drupalProcessAjaxResponse($content, array $ajax_response, arr
           // @todo Ajax commands can target any jQuery selector, but these are
           //   hard to fully emulate with XPath. For now, just handle 'head'
           //   and 'body', since these are used by the Ajax renderer.
-          elseif (in_array($command['selector'], array('head', 'body'))) {
+          elseif (in_array($command['selector'], ['head', 'body'])) {
             $wrapperNode = $xpath->query('//' . $command['selector'])->item(0);
           }
           if ($wrapperNode) {
@@ -1464,16 +1464,16 @@ protected function drupalProcessAjaxResponse($content, array $ajax_response, arr
    * @see WebTestBase::getAjaxPageStatePostData()
    * @see WebTestBase::curlExec()
    */
-  protected function drupalPost($path, $accept, array $post, $options = array()) {
-    return $this->curlExec(array(
+  protected function drupalPost($path, $accept, array $post, $options = []) {
+    return $this->curlExec([
       CURLOPT_URL => $this->buildUrl($path, $options),
       CURLOPT_POST => TRUE,
       CURLOPT_POSTFIELDS => $this->serializePostValues($post),
-      CURLOPT_HTTPHEADER => array(
+      CURLOPT_HTTPHEADER => [
         'Accept: ' . $accept,
         'Content-Type: application/x-www-form-urlencoded',
-      ),
-    ));
+      ],
+    ]);
   }
 
   /**
@@ -1510,7 +1510,7 @@ protected function drupalPostWithFormat($path, $format, array $post, $options =
    *   The Ajax page state POST data.
    */
   protected function getAjaxPageStatePostData() {
-    $post = array();
+    $post = [];
     $drupal_settings = $this->drupalSettings;
     if (isset($drupal_settings['ajaxPageState']['theme'])) {
       $post['ajax_page_state[theme]'] = $drupal_settings['ajaxPageState']['theme'];
@@ -1537,7 +1537,7 @@ protected function getAjaxPageStatePostData() {
    * @return string
    *   The serialized result.
    */
-  protected function serializePostValues($post = array()) {
+  protected function serializePostValues($post = []) {
     foreach ($post as $key => $value) {
       $post[$key] = urlencode($key) . '=' . urlencode($value);
     }
@@ -1554,7 +1554,7 @@ protected function serializePostValues($post = array()) {
    *   The flattened $edit array suitable for WebTestBase::drupalPostForm().
    */
   protected function translatePostValues(array $values) {
-    $edit = array();
+    $edit = [];
     // The easiest and most straightforward way to translate values suitable for
     // WebTestBase::drupalPostForm() is to actually build the POST data string
     // and convert the resulting key/value pairs back into a flat array.
@@ -1604,10 +1604,10 @@ protected function checkForMetaRefresh() {
    * @return
    *   The retrieved headers, also available as $this->getRawContent()
    */
-  protected function drupalHead($path, array $options = array(), array $headers = array()) {
+  protected function drupalHead($path, array $options = [], array $headers = []) {
     $options['absolute'] = TRUE;
     $url = $this->buildUrl($path, $options);
-    $out = $this->curlExec(array(CURLOPT_NOBODY => TRUE, CURLOPT_URL => $url, CURLOPT_HTTPHEADER => $headers));
+    $out = $this->curlExec([CURLOPT_NOBODY => TRUE, CURLOPT_URL => $url, CURLOPT_HTTPHEADER => $headers]);
     // Ensure that any changes to variables in the other thread are picked up.
     $this->refreshVariables();
 
@@ -1838,13 +1838,13 @@ protected function clickLinkHelper($label, $index, $pattern) {
     // Cast MarkupInterface objects to string.
     $label = (string) $label;
     $url_before = $this->getUrl();
-    $urls = $this->xpath($pattern, array(':label' => $label));
+    $urls = $this->xpath($pattern, [':label' => $label]);
     if (isset($urls[$index])) {
       $url_target = $this->getAbsoluteUrl($urls[$index]['href']);
-      $this->pass(SafeMarkup::format('Clicked link %label (@url_target) from @url_before', array('%label' => $label, '@url_target' => $url_target, '@url_before' => $url_before)), 'Browser');
+      $this->pass(SafeMarkup::format('Clicked link %label (@url_target) from @url_before', ['%label' => $label, '@url_target' => $url_target, '@url_before' => $url_before]), 'Browser');
       return $this->drupalGet($url_target);
     }
-    $this->fail(SafeMarkup::format('Link %label does not exist on @url_before', array('%label' => $label, '@url_before' => $url_before)), 'Browser');
+    $this->fail(SafeMarkup::format('Link %label does not exist on @url_before', ['%label' => $label, '@url_before' => $url_before]), 'Browser');
     return FALSE;
   }
 
@@ -1921,7 +1921,7 @@ protected function getAbsoluteUrl($path) {
    */
   protected function drupalGetHeaders($all_requests = FALSE) {
     $request = 0;
-    $headers = array($request => array());
+    $headers = [$request => []];
     foreach ($this->headers as $header) {
       $header = trim($header);
       if ($header === '') {
@@ -2032,7 +2032,7 @@ protected function assertHeader($header, $value, $message = '', $group = 'Browse
    * @return
    *   TRUE on pass, FALSE on fail.
    */
-  protected function assertUrl($path, array $options = array(), $message = '', $group = 'Other') {
+  protected function assertUrl($path, array $options = [], $message = '', $group = 'Other') {
     if ($path instanceof Url) {
       $url_obj = $path;
     }
@@ -2047,10 +2047,10 @@ protected function assertUrl($path, array $options = array(), $message = '', $gr
     }
     $url = $url_obj->setAbsolute()->toString();
     if (!$message) {
-      $message = SafeMarkup::format('Expected @url matches current URL (@current_url).', array(
+      $message = SafeMarkup::format('Expected @url matches current URL (@current_url).', [
         '@url' => var_export($url, TRUE),
         '@current_url' => $this->getUrl(),
-      ));
+      ]);
     }
     // Paths in query strings can be encoded or decoded with no functional
     // difference, decode them for comparison purposes.
@@ -2082,7 +2082,7 @@ protected function assertUrl($path, array $options = array(), $message = '', $gr
   protected function assertResponse($code, $message = '', $group = 'Browser') {
     $curl_code = curl_getinfo($this->curlHandle, CURLINFO_HTTP_CODE);
     $match = is_array($code) ? in_array($curl_code, $code) : $curl_code == $code;
-    return $this->assertTrue($match, $message ? $message : SafeMarkup::format('HTTP response expected @code, actual @curl_code', array('@code' => $code, '@curl_code' => $curl_code)), $group);
+    return $this->assertTrue($match, $message ? $message : SafeMarkup::format('HTTP response expected @code, actual @curl_code', ['@code' => $code, '@curl_code' => $curl_code]), $group);
   }
 
   /**
@@ -2108,7 +2108,7 @@ protected function assertResponse($code, $message = '', $group = 'Browser') {
   protected function assertNoResponse($code, $message = '', $group = 'Browser') {
     $curl_code = curl_getinfo($this->curlHandle, CURLINFO_HTTP_CODE);
     $match = is_array($code) ? in_array($curl_code, $code) : $curl_code == $code;
-    return $this->assertFalse($match, $message ? $message : SafeMarkup::format('HTTP response not expected @code, actual @curl_code', array('@code' => $code, '@curl_code' => $curl_code)), $group);
+    return $this->assertFalse($match, $message ? $message : SafeMarkup::format('HTTP response not expected @code, actual @curl_code', ['@code' => $code, '@curl_code' => $curl_code]), $group);
   }
 
   /**
@@ -2122,7 +2122,7 @@ protected function assertNoResponse($code, $message = '', $group = 'Browser') {
    * @return string
    *   An absolute URL string.
    */
-  protected function buildUrl($path, array $options = array()) {
+  protected function buildUrl($path, array $options = []) {
     if ($path instanceof Url) {
       $url_options = $path->getOptions();
       $options = $url_options + $options;
diff --git a/core/modules/simpletest/tests/modules/simpletest_test/simpletest_test.install b/core/modules/simpletest/tests/modules/simpletest_test/simpletest_test.install
index 447a192f4119e88784328c90045bc55bbbc9c28d..aabe921f59095f35035bb1abd043cbc4da252c5a 100644
--- a/core/modules/simpletest/tests/modules/simpletest_test/simpletest_test.install
+++ b/core/modules/simpletest/tests/modules/simpletest_test/simpletest_test.install
@@ -12,13 +12,13 @@
  */
 function simpletest_test_install() {
   $total = 2;
-  $operations = array();
+  $operations = [];
   for ($i = 1; $i <= $total; $i++) {
-    $operations[] = array('_simpletest_test_callback', array($i));
+    $operations[] = ['_simpletest_test_callback', [$i]];
   }
-  $batch = array(
+  $batch = [
     'operations' => $operations,
-  );
+  ];
   batch_set($batch);
   $batch =& batch_get();
   $batch['progressive'] = FALSE;
@@ -29,6 +29,6 @@ function simpletest_test_install() {
  * Callback for batch operations.
  */
 function _simpletest_test_callback($id) {
-  $entity = EntityTest::create(array('id' => $id));
+  $entity = EntityTest::create(['id' => $id]);
   $entity->save();
 }
diff --git a/core/modules/simpletest/tests/src/Functional/FolderTest.php b/core/modules/simpletest/tests/src/Functional/FolderTest.php
index 4055976a679c3cca43914cb104ff7af83d7d61e9..92844d8ed9ff51b0b97bdff925a2106f79ccd2e6 100644
--- a/core/modules/simpletest/tests/src/Functional/FolderTest.php
+++ b/core/modules/simpletest/tests/src/Functional/FolderTest.php
@@ -17,7 +17,7 @@ class FolderTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('image');
+  public static $modules = ['image'];
 
   function testFolderSetup() {
     $directory = file_default_scheme() . '://styles';
diff --git a/core/modules/simpletest/tests/src/Functional/MailCaptureTest.php b/core/modules/simpletest/tests/src/Functional/MailCaptureTest.php
index b79db8d3fb76169554af3faab7eb318df85e3838..1193e478ed8d9701f1b4ee6ecba7affcf3ba3de2 100644
--- a/core/modules/simpletest/tests/src/Functional/MailCaptureTest.php
+++ b/core/modules/simpletest/tests/src/Functional/MailCaptureTest.php
@@ -22,20 +22,20 @@ function testMailSend() {
     // Create an email.
     $subject = $this->randomString(64);
     $body = $this->randomString(128);
-    $message = array(
+    $message = [
       'id' => 'drupal_mail_test',
-      'headers' => array('Content-type' => 'text/html'),
+      'headers' => ['Content-type' => 'text/html'],
       'subject' => $subject,
       'to' => 'foobar@example.com',
       'body' => $body,
-    );
+    ];
 
     // Before we send the email, drupalGetMails should return an empty array.
     $captured_emails = $this->drupalGetMails();
     $this->assertEqual(count($captured_emails), 0, 'The captured emails queue is empty.', 'Email');
 
     // Send the email.
-    \Drupal::service('plugin.manager.mail')->getInstance(array('module' => 'simpletest', 'key' => 'drupal_mail_test'))->mail($message);
+    \Drupal::service('plugin.manager.mail')->getInstance(['module' => 'simpletest', 'key' => 'drupal_mail_test'])->mail($message);
 
     // Ensure that there is one email in the captured emails array.
     $captured_emails = $this->drupalGetMails();
@@ -44,19 +44,19 @@ function testMailSend() {
     // Assert that the email was sent by iterating over the message properties
     // and ensuring that they are captured intact.
     foreach ($message as $field => $value) {
-      $this->assertMail($field, $value, format_string('The email was sent and the value for property @field is intact.', array('@field' => $field)), 'Email');
+      $this->assertMail($field, $value, format_string('The email was sent and the value for property @field is intact.', ['@field' => $field]), 'Email');
     }
 
     // Send additional emails so more than one email is captured.
     for ($index = 0; $index < 5; $index++) {
-      $message = array(
+      $message = [
         'id' => 'drupal_mail_test_' . $index,
-        'headers' => array('Content-type' => 'text/html'),
+        'headers' => ['Content-type' => 'text/html'],
         'subject' => $this->randomString(64),
         'to' => $this->randomMachineName(32) . '@example.com',
         'body' => $this->randomString(512),
-      );
-      \Drupal::service('plugin.manager.mail')->getInstance(array('module' => 'drupal_mail_test', 'key' => $index))->mail($message);
+      ];
+      \Drupal::service('plugin.manager.mail')->getInstance(['module' => 'drupal_mail_test', 'key' => $index])->mail($message);
     }
 
     // There should now be 6 emails captured.
@@ -64,18 +64,18 @@ function testMailSend() {
     $this->assertEqual(count($captured_emails), 6, 'All emails were captured.', 'Email');
 
     // Test different ways of getting filtered emails via drupalGetMails().
-    $captured_emails = $this->drupalGetMails(array('id' => 'drupal_mail_test'));
+    $captured_emails = $this->drupalGetMails(['id' => 'drupal_mail_test']);
     $this->assertEqual(count($captured_emails), 1, 'Only one email is returned when filtering by id.', 'Email');
-    $captured_emails = $this->drupalGetMails(array('id' => 'drupal_mail_test', 'subject' => $subject));
+    $captured_emails = $this->drupalGetMails(['id' => 'drupal_mail_test', 'subject' => $subject]);
     $this->assertEqual(count($captured_emails), 1, 'Only one email is returned when filtering by id and subject.', 'Email');
-    $captured_emails = $this->drupalGetMails(array('id' => 'drupal_mail_test', 'subject' => $subject, 'from' => 'this_was_not_used@example.com'));
+    $captured_emails = $this->drupalGetMails(['id' => 'drupal_mail_test', 'subject' => $subject, 'from' => 'this_was_not_used@example.com']);
     $this->assertEqual(count($captured_emails), 0, 'No emails are returned when querying with an unused from address.', 'Email');
 
     // Send the last email again, so we can confirm that the
     // drupalGetMails-filter correctly returns all emails with a given
     // property/value.
-    \Drupal::service('plugin.manager.mail')->getInstance(array('module' => 'drupal_mail_test', 'key' => $index))->mail($message);
-    $captured_emails = $this->drupalGetMails(array('id' => 'drupal_mail_test_4'));
+    \Drupal::service('plugin.manager.mail')->getInstance(['module' => 'drupal_mail_test', 'key' => $index])->mail($message);
+    $captured_emails = $this->drupalGetMails(['id' => 'drupal_mail_test_4']);
     $this->assertEqual(count($captured_emails), 2, 'All emails with the same id are returned when filtering by id.', 'Email');
   }
 
diff --git a/core/modules/simpletest/tests/src/Functional/OtherInstallationProfileTestsTest.php b/core/modules/simpletest/tests/src/Functional/OtherInstallationProfileTestsTest.php
index 71601e2792bac191ee42bfabc799848ba40afbbf..04736ec0ed28e5174420e90d633ca5b648bc1283 100644
--- a/core/modules/simpletest/tests/src/Functional/OtherInstallationProfileTestsTest.php
+++ b/core/modules/simpletest/tests/src/Functional/OtherInstallationProfileTestsTest.php
@@ -17,7 +17,7 @@ class OtherInstallationProfileTestsTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('simpletest');
+  public static $modules = ['simpletest'];
 
   /**
    * Use the Minimal profile.
@@ -43,7 +43,7 @@ class OtherInstallationProfileTestsTest extends BrowserTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer unit tests'));
+    $this->adminUser = $this->drupalCreateUser(['administer unit tests']);
     $this->drupalLogin($this->adminUser);
   }
 
diff --git a/core/modules/simpletest/tests/src/Kernel/Migrate/d6/MigrateSimpletestConfigsTest.php b/core/modules/simpletest/tests/src/Kernel/Migrate/d6/MigrateSimpletestConfigsTest.php
index b45f9ab3adacc4e57541b25bd5b4cfb8ca3625b2..f8f9ffb02ceb041f3c5f949b362d357a9899d8c1 100644
--- a/core/modules/simpletest/tests/src/Kernel/Migrate/d6/MigrateSimpletestConfigsTest.php
+++ b/core/modules/simpletest/tests/src/Kernel/Migrate/d6/MigrateSimpletestConfigsTest.php
@@ -17,7 +17,7 @@ class MigrateSimpletestConfigsTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('simpletest');
+  public static $modules = ['simpletest'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/simpletest/tests/src/Unit/TestBaseTest.php b/core/modules/simpletest/tests/src/Unit/TestBaseTest.php
index 6643eb666fbdb6825f83d538321d3d1b04a4de51..cdfe9869b59c873096c9466357d2630e1fae9a78 100644
--- a/core/modules/simpletest/tests/src/Unit/TestBaseTest.php
+++ b/core/modules/simpletest/tests/src/Unit/TestBaseTest.php
@@ -25,8 +25,8 @@ class TestBaseTest extends UnitTestCase {
    */
   public function getTestBaseForAssertionTests($test_id) {
     $mock_test_base = $this->getMockBuilder('Drupal\simpletest\TestBase')
-      ->setConstructorArgs(array($test_id))
-      ->setMethods(array('storeAssertion'))
+      ->setConstructorArgs([$test_id])
+      ->setMethods(['storeAssertion'])
       ->getMockForAbstractClass();
     // Override storeAssertion() so we don't need a database.
     $mock_test_base->expects($this->any())
@@ -62,16 +62,16 @@ public function invokeProtectedMethod($object, $method_name, array $arguments) {
    *   - The string to validate.
    */
   public function providerRandomStringValidate() {
-    return array(
-      array(FALSE, ' curry paste'),
-      array(FALSE, 'curry paste '),
-      array(FALSE, 'curry  paste'),
-      array(FALSE, 'curry   paste'),
-      array(TRUE, 'curry paste'),
-      array(TRUE, 'thai green curry paste'),
-      array(TRUE, '@startswithat'),
-      array(TRUE, 'contains@at'),
-    );
+    return [
+      [FALSE, ' curry paste'],
+      [FALSE, 'curry paste '],
+      [FALSE, 'curry  paste'],
+      [FALSE, 'curry   paste'],
+      [TRUE, 'curry paste'],
+      [TRUE, 'thai green curry paste'],
+      [TRUE, '@startswithat'],
+      [TRUE, 'contains@at'],
+    ];
   }
 
   /**
@@ -136,7 +136,7 @@ public function testCheckRequirements() {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertInternalType(
         'array',
-        $this->invokeProtectedMethod($test_base, 'checkRequirements', array())
+        $this->invokeProtectedMethod($test_base, 'checkRequirements', [])
     );
   }
 
@@ -153,14 +153,14 @@ public function testCheckRequirements() {
    *   - Caller, passed to assert().
    */
   public function providerAssert() {
-    return array(
-      array(TRUE, 'pass', TRUE, 'Yay pass', 'test', array()),
-      array(FALSE, 'fail', FALSE, 'Boo fail', 'test', array()),
-      array(TRUE, 'pass', 'pass', 'Yay pass', 'test', array()),
-      array(FALSE, 'fail', 'fail', 'Boo fail', 'test', array()),
-      array(FALSE, 'exception', 'exception', 'Boo fail', 'test', array()),
-      array(FALSE, 'debug', 'debug', 'Boo fail', 'test', array()),
-    );
+    return [
+      [TRUE, 'pass', TRUE, 'Yay pass', 'test', []],
+      [FALSE, 'fail', FALSE, 'Boo fail', 'test', []],
+      [TRUE, 'pass', 'pass', 'Yay pass', 'test', []],
+      [FALSE, 'fail', 'fail', 'Boo fail', 'test', []],
+      [FALSE, 'exception', 'exception', 'Boo fail', 'test', []],
+      [FALSE, 'debug', 'debug', 'Boo fail', 'test', []],
+    ];
   }
 
   /**
@@ -185,7 +185,7 @@ public function testAssert($expected, $assertion_status, $status, $message, $gro
     $this->assertEquals(
         $expected,
         $ref_assert->invokeArgs($test_base,
-          array($status, $message, $group, $caller)
+          [$status, $message, $group, $caller]
         )
     );
 
@@ -211,10 +211,10 @@ public function testAssert($expected, $assertion_status, $status, $message, $gro
    * Data provider for assertTrue().
    */
   public function providerAssertTrue() {
-    return array(
-      array(TRUE, TRUE),
-      array(FALSE, FALSE),
-    );
+    return [
+      [TRUE, TRUE],
+      [FALSE, FALSE],
+    ];
   }
 
   /**
@@ -225,7 +225,7 @@ public function testAssertTrue($expected, $value) {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         $expected,
-        $this->invokeProtectedMethod($test_base, 'assertTrue', array($value))
+        $this->invokeProtectedMethod($test_base, 'assertTrue', [$value])
     );
   }
 
@@ -237,7 +237,7 @@ public function testAssertFalse($expected, $value) {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         (!$expected),
-        $this->invokeProtectedMethod($test_base, 'assertFalse', array($value))
+        $this->invokeProtectedMethod($test_base, 'assertFalse', [$value])
     );
   }
 
@@ -245,10 +245,10 @@ public function testAssertFalse($expected, $value) {
    * Data provider for assertNull().
    */
   public function providerAssertNull() {
-    return array(
-      array(TRUE, NULL),
-      array(FALSE, ''),
-    );
+    return [
+      [TRUE, NULL],
+      [FALSE, ''],
+    ];
   }
 
   /**
@@ -259,7 +259,7 @@ public function testAssertNull($expected, $value) {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         $expected,
-        $this->invokeProtectedMethod($test_base, 'assertNull', array($value))
+        $this->invokeProtectedMethod($test_base, 'assertNull', [$value])
     );
   }
 
@@ -271,7 +271,7 @@ public function testAssertNotNull($expected, $value) {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         (!$expected),
-        $this->invokeProtectedMethod($test_base, 'assertNotNull', array($value))
+        $this->invokeProtectedMethod($test_base, 'assertNotNull', [$value])
     );
   }
 
@@ -325,7 +325,7 @@ public function testAssertIdentical($expected_identical, $expected_equal, $first
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         $expected_identical,
-        $this->invokeProtectedMethod($test_base, 'assertIdentical', array($first, $second))
+        $this->invokeProtectedMethod($test_base, 'assertIdentical', [$first, $second])
     );
   }
 
@@ -337,7 +337,7 @@ public function testAssertNotIdentical($expected_identical, $expected_equal, $fi
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         (!$expected_identical),
-        $this->invokeProtectedMethod($test_base, 'assertNotIdentical', array($first, $second))
+        $this->invokeProtectedMethod($test_base, 'assertNotIdentical', [$first, $second])
     );
   }
 
@@ -349,7 +349,7 @@ public function testAssertEqual($expected_identical, $expected_equal, $first, $s
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         $expected_equal,
-        $this->invokeProtectedMethod($test_base, 'assertEqual', array($first, $second))
+        $this->invokeProtectedMethod($test_base, 'assertEqual', [$first, $second])
     );
   }
 
@@ -361,7 +361,7 @@ public function testAssertNotEqual($expected_identical, $expected_equal, $first,
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         (!$expected_equal),
-        $this->invokeProtectedMethod($test_base, 'assertNotEqual', array($first, $second))
+        $this->invokeProtectedMethod($test_base, 'assertNotEqual', [$first, $second])
     );
   }
 
@@ -374,11 +374,11 @@ public function providerAssertIdenticalObject() {
     $obj2 = $obj1;
     $obj3 = clone $obj1;
     $obj4 = new \stdClass();
-    return array(
-      array(TRUE, $obj1, $obj2),
-      array(TRUE, $obj1, $obj3),
-      array(FALSE, $obj1, $obj4),
-    );
+    return [
+      [TRUE, $obj1, $obj2],
+      [TRUE, $obj1, $obj3],
+      [FALSE, $obj1, $obj4],
+    ];
   }
 
   /**
@@ -389,7 +389,7 @@ public function testAssertIdenticalObject($expected, $first, $second) {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
       $expected,
-      $this->invokeProtectedMethod($test_base, 'assertIdenticalObject', array($first, $second))
+      $this->invokeProtectedMethod($test_base, 'assertIdenticalObject', [$first, $second])
     );
   }
 
@@ -400,7 +400,7 @@ public function testPass() {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         TRUE,
-        $this->invokeProtectedMethod($test_base, 'pass', array())
+        $this->invokeProtectedMethod($test_base, 'pass', [])
     );
   }
 
@@ -411,7 +411,7 @@ public function testFail() {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertEquals(
         FALSE,
-        $this->invokeProtectedMethod($test_base, 'fail', array())
+        $this->invokeProtectedMethod($test_base, 'fail', [])
     );
   }
 
@@ -423,10 +423,10 @@ public function testFail() {
    *   - Group for use in assert().
    */
   public function providerError() {
-    return array(
-      array('debug', 'User notice'),
-      array('exception', 'Not User notice'),
-    );
+    return [
+      ['debug', 'User notice'],
+      ['exception', 'Not User notice'],
+    ];
   }
 
   /**
@@ -436,7 +436,7 @@ public function providerError() {
   public function testError($status, $group) {
     // Mock up a TestBase object.
     $mock_test_base = $this->getMockBuilder('Drupal\simpletest\TestBase')
-      ->setMethods(array('assert'))
+      ->setMethods(['assert'])
       ->getMockForAbstractClass();
 
     // Set expectations for assert().
@@ -451,7 +451,7 @@ public function testError($status, $group) {
     // Invoke error().
     $this->assertEquals(
         "$status:$group",
-        $this->invokeProtectedMethod($mock_test_base, 'error', array('msg', $group))
+        $this->invokeProtectedMethod($mock_test_base, 'error', ['msg', $group])
     );
   }
 
@@ -462,7 +462,7 @@ public function testGetRandomGenerator() {
     $test_base = $this->getTestBaseForAssertionTests('test_id');
     $this->assertInstanceOf(
         'Drupal\Component\Utility\Random',
-        $this->invokeProtectedMethod($test_base, 'getRandomGenerator', array())
+        $this->invokeProtectedMethod($test_base, 'getRandomGenerator', [])
     );
   }
 
diff --git a/core/modules/simpletest/tests/src/Unit/WebTestBaseTest.php b/core/modules/simpletest/tests/src/Unit/WebTestBaseTest.php
index 1c087a6fd755db37f988c7edc51a48d7a37a4947..df909560a117929ae5819529242939fc80bb36c4 100644
--- a/core/modules/simpletest/tests/src/Unit/WebTestBaseTest.php
+++ b/core/modules/simpletest/tests/src/Unit/WebTestBaseTest.php
@@ -18,12 +18,12 @@ class WebTestBaseTest extends UnitTestCase {
    *   An array of values passed to the test method.
    */
   public function providerAssertFieldByName() {
-    $data = array();
-    $data[] = array('select_2nd_selected', 'test', '1', FALSE);
-    $data[] = array('select_2nd_selected', 'test', '2', TRUE);
-    $data[] = array('select_none_selected', 'test', '', FALSE);
-    $data[] = array('select_none_selected', 'test', '1', TRUE);
-    $data[] = array('select_none_selected', 'test', NULL, TRUE);
+    $data = [];
+    $data[] = ['select_2nd_selected', 'test', '1', FALSE];
+    $data[] = ['select_2nd_selected', 'test', '2', TRUE];
+    $data[] = ['select_none_selected', 'test', '', FALSE];
+    $data[] = ['select_none_selected', 'test', '1', TRUE];
+    $data[] = ['select_none_selected', 'test', NULL, TRUE];
 
     return $data;
   }
@@ -50,7 +50,7 @@ public function testAssertFieldByName($filename, $name, $value, $expected) {
 
     $web_test = $this->getMockBuilder('Drupal\simpletest\WebTestBase')
       ->disableOriginalConstructor()
-      ->setMethods(array('getRawContent', 'assertTrue', 'pass'))
+      ->setMethods(['getRawContent', 'assertTrue', 'pass'])
       ->getMock();
 
     $web_test->expects($this->any())
@@ -65,7 +65,7 @@ public function testAssertFieldByName($filename, $name, $value, $expected) {
 
     $test_method = new \ReflectionMethod('Drupal\simpletest\WebTestBase', 'assertFieldByName');
     $test_method->setAccessible(TRUE);
-    $test_method->invokeArgs($web_test, array($name, $value, 'message'));
+    $test_method->invokeArgs($web_test, [$name, $value, 'message']);
   }
 
   /**
@@ -87,32 +87,32 @@ public function testAssertFieldByName($filename, $name, $value, $expected) {
    *     to mock no link found on the page.
    */
   public function providerTestClickLink() {
-    return array(
+    return [
       // Test for a non-existent label.
-      array(
+      [
         FALSE,
         'does_not_exist',
         0,
-        array(),
-      ),
+        [],
+      ],
       // Test for an existing label.
-      array(
+      [
         'This Text Returned By drupalGet()',
         'exists',
         0,
-        array(0 => array('href' => 'this_is_a_url')),
-      ),
+        [0 => ['href' => 'this_is_a_url']],
+      ],
       // Test for an existing label that isn't the first one.
-      array(
+      [
         'This Text Returned By drupalGet()',
         'exists',
         1,
-        array(
-          0 => array('href' => 'this_is_a_url'),
-          1 => array('href' => 'this_is_another_url'),
-        ),
-      ),
-    );
+        [
+          0 => ['href' => 'this_is_a_url'],
+          1 => ['href' => 'this_is_another_url'],
+        ],
+      ],
+    ];
   }
 
   /**
@@ -134,14 +134,14 @@ public function testClickLink($expected, $label, $index, $xpath_data) {
     // Mock a WebTestBase object and some of its methods.
     $web_test = $this->getMockBuilder('Drupal\simpletest\WebTestBase')
       ->disableOriginalConstructor()
-      ->setMethods(array(
+      ->setMethods([
         'pass',
         'fail',
         'getUrl',
         'xpath',
         'drupalGet',
         'getAbsoluteUrl',
-      ))
+      ])
       ->getMock();
 
     // Mocked getUrl() is only used for reporting so we just return a string.
diff --git a/core/modules/statistics/src/NodeStatisticsDatabaseStorage.php b/core/modules/statistics/src/NodeStatisticsDatabaseStorage.php
index 32d28726181c0a721b206c1768aff8d929433d27..0cccb1700b61238d46d8a9cb30bc14eb9b3917a4 100644
--- a/core/modules/statistics/src/NodeStatisticsDatabaseStorage.php
+++ b/core/modules/statistics/src/NodeStatisticsDatabaseStorage.php
@@ -83,7 +83,7 @@ public function fetchViews($ids) {
    * {@inheritdoc}
    */
   public function fetchView($id) {
-    $views = $this->fetchViews(array($id));
+    $views = $this->fetchViews([$id]);
     return reset($views);
   }
 
diff --git a/core/modules/statistics/src/Plugin/Block/StatisticsPopularBlock.php b/core/modules/statistics/src/Plugin/Block/StatisticsPopularBlock.php
index 8bd84b2b78ccc5041da94da38691cfa942e368f8..1802a4569c3f42b70ad881028c1bf636a5a96020 100644
--- a/core/modules/statistics/src/Plugin/Block/StatisticsPopularBlock.php
+++ b/core/modules/statistics/src/Plugin/Block/StatisticsPopularBlock.php
@@ -92,11 +92,11 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'top_day_num' => 0,
       'top_all_num' => 0,
       'top_last_num' => 0
-    );
+    ];
   }
 
   /**
@@ -111,29 +111,29 @@ protected function blockAccess(AccountInterface $account) {
    */
   public function blockForm($form, FormStateInterface $form_state) {
     // Popular content block settings.
-    $numbers = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 40);
-    $numbers = array('0' => $this->t('Disabled')) + array_combine($numbers, $numbers);
-    $form['statistics_block_top_day_num'] = array(
+    $numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 40];
+    $numbers = ['0' => $this->t('Disabled')] + array_combine($numbers, $numbers);
+    $form['statistics_block_top_day_num'] = [
      '#type' => 'select',
      '#title' => $this->t("Number of day's top views to display"),
      '#default_value' => $this->configuration['top_day_num'],
      '#options' => $numbers,
      '#description' => $this->t('How many content items to display in "day" list.'),
-    );
-    $form['statistics_block_top_all_num'] = array(
+    ];
+    $form['statistics_block_top_all_num'] = [
       '#type' => 'select',
       '#title' => $this->t('Number of all time views to display'),
       '#default_value' => $this->configuration['top_all_num'],
       '#options' => $numbers,
       '#description' => $this->t('How many content items to display in "all time" list.'),
-    );
-    $form['statistics_block_top_last_num'] = array(
+    ];
+    $form['statistics_block_top_last_num'] = [
       '#type' => 'select',
       '#title' => $this->t('Number of most recent views to display'),
       '#default_value' => $this->configuration['top_last_num'],
       '#options' => $numbers,
       '#description' => $this->t('How many content items to display in "recently viewed" list.'),
-    );
+    ];
     return $form;
   }
 
@@ -150,7 +150,7 @@ public function blockSubmit($form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function build() {
-    $content = array();
+    $content = [];
 
     if ($this->configuration['top_day_num'] > 0) {
       $nids = $this->statisticsStorage->fetchAll('daycount', $this->configuration['top_day_num']);
diff --git a/core/modules/statistics/src/StatisticsSettingsForm.php b/core/modules/statistics/src/StatisticsSettingsForm.php
index 2abb5642a49d2a9f9467e5bd53fc5c615af4760d..71a1764b80fdb45f1287cbd00282ca2367f11cda 100644
--- a/core/modules/statistics/src/StatisticsSettingsForm.php
+++ b/core/modules/statistics/src/StatisticsSettingsForm.php
@@ -65,17 +65,17 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('statistics.settings');
 
     // Content counter settings.
-    $form['content'] = array(
+    $form['content'] = [
       '#type' => 'details',
       '#title' => t('Content viewing counter settings'),
       '#open' => TRUE,
-    );
-    $form['content']['statistics_count_content_views'] = array(
+    ];
+    $form['content']['statistics_count_content_views'] = [
       '#type' => 'checkbox',
       '#title' => t('Count content views'),
       '#default_value' => $config->get('count_content_views'),
       '#description' => t('Increment a counter each time content is viewed.'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/statistics/src/Tests/StatisticsAdminTest.php b/core/modules/statistics/src/Tests/StatisticsAdminTest.php
index 6d87fd975745f1a6b445e88e161e4637a413fd71..35af86b268762c9ba796de2269fce149ad0b8ea1 100644
--- a/core/modules/statistics/src/Tests/StatisticsAdminTest.php
+++ b/core/modules/statistics/src/Tests/StatisticsAdminTest.php
@@ -16,7 +16,7 @@ class StatisticsAdminTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'statistics');
+  public static $modules = ['node', 'statistics'];
 
   /**
    * A user that has permission to administer statistics.
@@ -47,11 +47,11 @@ protected function setUp() {
 
     // Create Basic page node type.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
     }
-    $this->privilegedUser = $this->drupalCreateUser(array('administer statistics', 'view post access counter', 'create page content'));
+    $this->privilegedUser = $this->drupalCreateUser(['administer statistics', 'view post access counter', 'create page content']);
     $this->drupalLogin($this->privilegedUser);
-    $this->testNode = $this->drupalCreateNode(array('type' => 'page', 'uid' => $this->privilegedUser->id()));
+    $this->testNode = $this->drupalCreateNode(['type' => 'page', 'uid' => $this->privilegedUser->id()]);
     $this->client = \Drupal::httpClient();
   }
 
@@ -72,19 +72,19 @@ function testStatisticsSettings() {
     $this->drupalGet('node/' . $this->testNode->id());
     // Manually calling statistics.php, simulating ajax behavior.
     $nid = $this->testNode->id();
-    $post = array('nid' => $nid);
+    $post = ['nid' => $nid];
     global $base_url;
     $stats_path = $base_url . '/' . drupal_get_path('module', 'statistics') . '/statistics.php';
-    $this->client->post($stats_path, array('form_params' => $post));
+    $this->client->post($stats_path, ['form_params' => $post]);
 
     // Hit the node again (the counter is incremented after the hit, so
     // "1 view" will actually be shown when the node is hit the second time).
     $this->drupalGet('node/' . $this->testNode->id());
-    $this->client->post($stats_path, array('form_params' => $post));
+    $this->client->post($stats_path, ['form_params' => $post]);
     $this->assertText('1 view', 'Node is viewed once.');
 
     $this->drupalGet('node/' . $this->testNode->id());
-    $this->client->post($stats_path, array('form_params' => $post));
+    $this->client->post($stats_path, ['form_params' => $post]);
     $this->assertText('2 views', 'Node is viewed 2 times.');
 
     // Increase the max age to test that nodes are no longer immediately
@@ -93,7 +93,7 @@ function testStatisticsSettings() {
     $this->drupalGet('node/' . $this->testNode->id());
     $this->assertText('3 views', 'Node is viewed 3 times.');
 
-    $this->client->post($stats_path, array('form_params' => $post));
+    $this->client->post($stats_path, ['form_params' => $post]);
     $this->drupalGet('node/' . $this->testNode->id());
     $this->assertText('3 views', 'Views counter was not updated.');
   }
@@ -107,13 +107,13 @@ function testDeleteNode() {
     $this->drupalGet('node/' . $this->testNode->id());
     // Manually calling statistics.php, simulating ajax behavior.
     $nid = $this->testNode->id();
-    $post = array('nid' => $nid);
+    $post = ['nid' => $nid];
     global $base_url;
     $stats_path = $base_url . '/' . drupal_get_path('module', 'statistics') . '/statistics.php';
-    $this->client->post($stats_path, array('form_params' => $post));
+    $this->client->post($stats_path, ['form_params' => $post]);
 
     $result = db_select('node_counter', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->condition('n.nid', $this->testNode->id())
       ->execute()
       ->fetchAssoc();
@@ -122,7 +122,7 @@ function testDeleteNode() {
     $this->testNode->delete();
 
     $result = db_select('node_counter', 'n')
-      ->fields('n', array('nid'))
+      ->fields('n', ['nid'])
       ->condition('n.nid', $this->testNode->id())
       ->execute()
       ->fetchAssoc();
@@ -141,12 +141,12 @@ function testExpiredLogs() {
     $this->drupalGet('node/' . $this->testNode->id());
     // Manually calling statistics.php, simulating ajax behavior.
     $nid = $this->testNode->id();
-    $post = array('nid' => $nid);
+    $post = ['nid' => $nid];
     global $base_url;
     $stats_path = $base_url . '/' . drupal_get_path('module', 'statistics') . '/statistics.php';
-    $this->client->post($stats_path, array('form_params' => $post));
+    $this->client->post($stats_path, ['form_params' => $post]);
     $this->drupalGet('node/' . $this->testNode->id());
-    $this->client->post($stats_path, array('form_params' => $post));
+    $this->client->post($stats_path, ['form_params' => $post]);
     $this->assertText('1 view', 'Node is viewed once.');
 
     // statistics_cron() will subtract
@@ -160,7 +160,7 @@ function testExpiredLogs() {
     $this->assertNoText('node/' . $this->testNode->id(), 'No hit URL found.');
 
     $result = db_select('node_counter', 'nc')
-      ->fields('nc', array('daycount'))
+      ->fields('nc', ['daycount'])
       ->condition('nid', $this->testNode->id(), '=')
       ->execute()
       ->fetchField();
diff --git a/core/modules/statistics/src/Tests/StatisticsLoggingTest.php b/core/modules/statistics/src/Tests/StatisticsLoggingTest.php
index 9aa3cc3f9b6d2effb81eb270c0f2a82e148511b5..a7ed5ba0a4050d5b70404c756a58dccc1dc11a4a 100644
--- a/core/modules/statistics/src/Tests/StatisticsLoggingTest.php
+++ b/core/modules/statistics/src/Tests/StatisticsLoggingTest.php
@@ -19,7 +19,7 @@ class StatisticsLoggingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'statistics', 'block', 'locale');
+  public static $modules = ['node', 'statistics', 'block', 'locale'];
 
   /**
    * User with permissions to create and edit pages.
@@ -47,10 +47,10 @@ protected function setUp() {
 
     // Create Basic page node type.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
     }
 
-    $this->authUser = $this->drupalCreateUser(array(
+    $this->authUser = $this->drupalCreateUser([
       // For node creation.
       'access content',
       'create page content',
@@ -58,21 +58,21 @@ protected function setUp() {
       // For language negotiation administration.
       'administer languages',
       'access administration pages',
-    ));
+    ]);
 
     // Ensure we have a node page to access.
-    $this->node = $this->drupalCreateNode(array('title' => $this->randomMachineName(255), 'uid' => $this->authUser->id()));
+    $this->node = $this->drupalCreateNode(['title' => $this->randomMachineName(255), 'uid' => $this->authUser->id()]);
 
     // Add a custom language and enable path-based language negotiation.
     $this->drupalLogin($this->authUser);
-    $this->language = array(
+    $this->language = [
       'predefined_langcode' => 'custom',
       'langcode' => 'xx',
       'label' => $this->randomMachineName(16),
       'direction' => 'ltr',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $this->language, t('Add custom language'));
-    $this->drupalPostForm('admin/config/regional/language/detection', array('language_interface[enabled][language-url]' => 1), t('Save settings'));
+    $this->drupalPostForm('admin/config/regional/language/detection', ['language_interface[enabled][language-url]' => 1], t('Save settings'));
     $this->drupalLogout();
 
     // Enable access logging.
@@ -121,8 +121,8 @@ function testLogging() {
 
     // Manually call statistics.php to simulate ajax data collection behavior.
     global $base_root;
-    $post = array('nid' => $this->node->id());
-    $this->client->post($base_root . $stats_path, array('form_params' => $post));
+    $post = ['nid' => $this->node->id()];
+    $this->client->post($base_root . $stats_path, ['form_params' => $post]);
     $node_counter = statistics_get($this->node->id());
     $this->assertIdentical($node_counter['totalcount'], '1');
   }
diff --git a/core/modules/statistics/src/Tests/StatisticsReportsTest.php b/core/modules/statistics/src/Tests/StatisticsReportsTest.php
index 3851207b115b892ef7d5bcde3bca9bf374a50bd5..1524623eee23c937bba38d94cdcaae22f7f2f3a4 100644
--- a/core/modules/statistics/src/Tests/StatisticsReportsTest.php
+++ b/core/modules/statistics/src/Tests/StatisticsReportsTest.php
@@ -22,24 +22,24 @@ function testPopularContentBlock() {
     $this->container->get('plugin.manager.block')->clearCachedDefinitions();
 
     // Visit a node to have something show up in the block.
-    $node = $this->drupalCreateNode(array('type' => 'page', 'uid' => $this->blockingUser->id()));
+    $node = $this->drupalCreateNode(['type' => 'page', 'uid' => $this->blockingUser->id()]);
     $this->drupalGet('node/' . $node->id());
     // Manually calling statistics.php, simulating ajax behavior.
     $nid = $node->id();
-    $post = http_build_query(array('nid' => $nid));
-    $headers = array('Content-Type' => 'application/x-www-form-urlencoded');
+    $post = http_build_query(['nid' => $nid]);
+    $headers = ['Content-Type' => 'application/x-www-form-urlencoded'];
     global $base_url;
     $stats_path = $base_url . '/' . drupal_get_path('module', 'statistics') . '/statistics.php';
     $client = \Drupal::httpClient();
-    $client->post($stats_path, array('headers' => $headers, 'body' => $post));
+    $client->post($stats_path, ['headers' => $headers, 'body' => $post]);
 
     // Configure and save the block.
-    $block = $this->drupalPlaceBlock('statistics_popular_block', array(
+    $block = $this->drupalPlaceBlock('statistics_popular_block', [
       'label' => 'Popular content',
       'top_day_num' => 3,
       'top_all_num' => 3,
       'top_last_num' => 3,
-    ));
+    ]);
 
     // Get some page and check if the block is displayed.
     $this->drupalGet('user');
diff --git a/core/modules/statistics/src/Tests/StatisticsTestBase.php b/core/modules/statistics/src/Tests/StatisticsTestBase.php
index 27fe836528d645b6a7479334232775da5502814e..4f530cf9cd48d4edbd7c7f80dc56670b710a1c50 100644
--- a/core/modules/statistics/src/Tests/StatisticsTestBase.php
+++ b/core/modules/statistics/src/Tests/StatisticsTestBase.php
@@ -17,7 +17,7 @@ abstract class StatisticsTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'block', 'ban', 'statistics');
+  public static $modules = ['node', 'block', 'ban', 'statistics'];
 
   /**
    * User with permissions to ban IP's.
@@ -31,18 +31,18 @@ protected function setUp() {
 
     // Create Basic page node type.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
     }
 
     // Create user.
-    $this->blockingUser = $this->drupalCreateUser(array(
+    $this->blockingUser = $this->drupalCreateUser([
       'access administration pages',
       'access site reports',
       'ban IP addresses',
       'administer blocks',
       'administer statistics',
       'administer users',
-    ));
+    ]);
     $this->drupalLogin($this->blockingUser);
 
     // Enable logging.
diff --git a/core/modules/statistics/src/Tests/Views/IntegrationTest.php b/core/modules/statistics/src/Tests/Views/IntegrationTest.php
index 601aa6cc38b4cafc0be3f546801d5351acb3ccc0..18f55815879a68c44b4e8d443466b72732ee5f0e 100644
--- a/core/modules/statistics/src/Tests/Views/IntegrationTest.php
+++ b/core/modules/statistics/src/Tests/Views/IntegrationTest.php
@@ -19,7 +19,7 @@ class IntegrationTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('statistics', 'statistics_test_views', 'node');
+  public static $modules = ['statistics', 'statistics_test_views', 'node'];
 
   /**
    * Stores the user object that accesses the page.
@@ -40,21 +40,21 @@ class IntegrationTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_statistics_integration');
+  public static $testViews = ['test_statistics_integration'];
 
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('statistics_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['statistics_test_views']);
 
     // Create a new user for viewing nodes and statistics.
-    $this->webUser = $this->drupalCreateUser(array('access content', 'view post access counter'));
+    $this->webUser = $this->drupalCreateUser(['access content', 'view post access counter']);
 
     // Create a new user for viewing nodes only.
-    $this->deniedUser = $this->drupalCreateUser(array('access content'));
+    $this->deniedUser = $this->drupalCreateUser(['access content']);
 
-    $this->drupalCreateContentType(array('type' => 'page'));
-    $this->node = $this->drupalCreateNode(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
+    $this->node = $this->drupalCreateNode(['type' => 'page']);
 
     // Enable counting of content views.
     $this->config('statistics.settings')
@@ -75,7 +75,7 @@ public function testNodeCounterIntegration() {
     global $base_url;
     $stats_path = $base_url . '/' . drupal_get_path('module', 'statistics') . '/statistics.php';
     $client = \Drupal::httpClient();
-    $client->post($stats_path, array('form_params' => array('nid' => $this->node->id())));
+    $client->post($stats_path, ['form_params' => ['nid' => $this->node->id()]]);
     $this->drupalGet('test_statistics_integration');
 
     $expected = statistics_get($this->node->id());
diff --git a/core/modules/statistics/statistics.install b/core/modules/statistics/statistics.install
index f232e1d376ab455f79b1dd7e9915f0f09161a24c..deac9010a4aba84da89dfa15aae22a518980b8b7 100644
--- a/core/modules/statistics/statistics.install
+++ b/core/modules/statistics/statistics.install
@@ -18,42 +18,42 @@ function statistics_uninstall() {
  * Implements hook_schema().
  */
 function statistics_schema() {
-  $schema['node_counter'] = array(
+  $schema['node_counter'] = [
     'description' => 'Access statistics for {node}s.',
-    'fields' => array(
-      'nid' => array(
+    'fields' => [
+      'nid' => [
         'description' => 'The {node}.nid for these statistics.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'totalcount' => array(
+      ],
+      'totalcount' => [
         'description' => 'The total number of times the {node} has been viewed.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'size' => 'big',
-      ),
-      'daycount' => array(
+      ],
+      'daycount' => [
         'description' => 'The total number of times the {node} has been viewed today.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
         'size' => 'medium',
-      ),
-      'timestamp' => array(
+      ],
+      'timestamp' => [
         'description' => 'The most recent time the {node} has been viewed.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'primary key' => array('nid'),
-  );
+      ],
+    ],
+    'primary key' => ['nid'],
+  ];
 
   return $schema;
 }
@@ -63,7 +63,7 @@ function statistics_schema() {
  */
 function statistics_update_8001() {
   if (!\Drupal::moduleHandler()->moduleExists('node')) {
-    if (\Drupal::service('module_installer')->uninstall(array('statistics'), TRUE)) {
+    if (\Drupal::service('module_installer')->uninstall(['statistics'], TRUE)) {
       return 'The statistics module depends on the node module and has therefore been uninstalled.';
     }
     else {
diff --git a/core/modules/statistics/statistics.module b/core/modules/statistics/statistics.module
index 922ed57c37c9bff0c81272d69872390298b405ab..a7f1e10601ea7e9fc55c102cac28e3aa18fba505 100644
--- a/core/modules/statistics/statistics.module
+++ b/core/modules/statistics/statistics.module
@@ -19,13 +19,13 @@ function statistics_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.statistics':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Statistics module shows you how often content is viewed. This is useful in determining which pages of your site are most popular. For more information, see the <a href=":statistics_do">online documentation for the Statistics module</a>.', array(':statistics_do' => 'https://www.drupal.org/documentation/modules/statistics/')) . '</p>';
+      $output .= '<p>' . t('The Statistics module shows you how often content is viewed. This is useful in determining which pages of your site are most popular. For more information, see the <a href=":statistics_do">online documentation for the Statistics module</a>.', [':statistics_do' => 'https://www.drupal.org/documentation/modules/statistics/']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Displaying popular content') . '</dt>';
-      $output .= '<dd>' . t('The module includes a <em>Popular content</em> block that displays the most viewed pages today and for all time, and the last content viewed. To use the block, enable <em>Count content views</em> on the <a href=":statistics-settings">Statistics page</a>, and then you can enable and configure the block on the <a href=":blocks">Block layout page</a>.', array(':statistics-settings' => \Drupal::url('statistics.settings'), ':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
+      $output .= '<dd>' . t('The module includes a <em>Popular content</em> block that displays the most viewed pages today and for all time, and the last content viewed. To use the block, enable <em>Count content views</em> on the <a href=":statistics-settings">Statistics page</a>, and then you can enable and configure the block on the <a href=":blocks">Block layout page</a>.', [':statistics-settings' => \Drupal::url('statistics.settings'), ':blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#']) . '</dd>';
       $output .= '<dt>' . t('Page view counter') . '</dt>';
-      $output .= '<dd>' . t('The Statistics module includes a counter for each page that increases whenever the page is viewed. To use the counter, enable <em>Count content views</em> on the <a href=":statistics-settings">Statistics page</a>, and set the necessary <a href=":permissions">permissions</a> (<em>View content hits</em>) so that the counter is visible to the users.', array(':statistics-settings' => \Drupal::url('statistics.settings'), ':permissions' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-statistics')))) . '</dd>';
+      $output .= '<dd>' . t('The Statistics module includes a counter for each page that increases whenever the page is viewed. To use the counter, enable <em>Count content views</em> on the <a href=":statistics-settings">Statistics page</a>, and set the necessary <a href=":permissions">permissions</a> (<em>View content hits</em>) so that the counter is visible to the users.', [':statistics-settings' => \Drupal::url('statistics.settings'), ':permissions' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-statistics'])]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -40,7 +40,7 @@ function statistics_help($route_name, RouteMatchInterface $route_match) {
 function statistics_node_view(array &$build, EntityInterface $node, EntityViewDisplayInterface $display, $view_mode) {
   if (!$node->isNew() && $view_mode == 'full' && node_is_page($node) && empty($node->in_preview)) {
     $build['#attached']['library'][] = 'statistics/drupal.statistics';
-    $settings = array('data' => array('nid' => $node->id()), 'url' => Url::fromUri('base:' . drupal_get_path('module', 'statistics') . '/statistics.php')->toString());
+    $settings = ['data' => ['nid' => $node->id()], 'url' => Url::fromUri('base:' . drupal_get_path('module', 'statistics') . '/statistics.php')->toString()];
     $build['#attached']['drupalSettings']['statistics'] = $settings;
   }
 }
@@ -55,11 +55,11 @@ function statistics_node_links_alter(array &$links, NodeInterface $entity, array
       $statistics = \Drupal::service('statistics.storage.node')->fetchView($entity->id());
       if ($statistics) {
         $statistics_links['statistics_counter']['title'] = \Drupal::translation()->formatPlural($statistics->getTotalCount(), '1 view', '@count views');
-        $links['statistics'] = array(
+        $links['statistics'] = [
           '#theme' => 'links__node__statistics',
           '#links' => $statistics_links,
-          '#attributes' => array('class' => array('links', 'inline')),
-        );
+          '#attributes' => ['class' => ['links', 'inline']],
+        ];
       }
       $links['#cache']['max-age'] = \Drupal::config('statistics.settings')->get('display_max_age');
     }
@@ -93,15 +93,15 @@ function statistics_cron() {
  *   be executed correctly.
  */
 function statistics_title_list($dbfield, $dbrows) {
-  if (in_array($dbfield, array('totalcount', 'daycount', 'timestamp'))) {
+  if (in_array($dbfield, ['totalcount', 'daycount', 'timestamp'])) {
     $query = db_select('node_field_data', 'n');
     $query->addTag('node_access');
     $query->join('node_counter', 's', 'n.nid = s.nid');
     $query->join('users_field_data', 'u', 'n.uid = u.uid');
 
     return $query
-      ->fields('n', array('nid', 'title'))
-      ->fields('u', array('uid', 'name'))
+      ->fields('n', ['nid', 'title'])
+      ->fields('u', ['uid', 'name'])
       ->condition($dbfield, 0, '<>')
       ->condition('n.status', 1)
       // @todo This should be actually filtering on the desired node status
@@ -147,15 +147,15 @@ function statistics_node_predelete(EntityInterface $node) {
  */
 function statistics_ranking() {
   if (\Drupal::config('statistics.settings')->get('count_content_views')) {
-    return array(
-      'views' => array(
+    return [
+      'views' => [
         'title' => t('Number of views'),
-        'join' => array(
+        'join' => [
           'type' => 'LEFT',
           'table' => 'node_counter',
           'alias' => 'node_counter',
           'on' => 'node_counter.nid = i.sid',
-        ),
+        ],
         // Inverse law that maps the highest view count on the site to 1 and 0
         // to 0. Note that the ROUND here is necessary for PostgreSQL and SQLite
         // in order to ensure that the :statistics_scale argument is treated as
@@ -163,9 +163,9 @@ function statistics_ranking() {
         // values in as strings instead of numbers in complex expressions like
         // this.
         'score' => '2.0 - 2.0 / (1.0 + node_counter.totalcount * (ROUND(:statistics_scale, 4)))',
-        'arguments' => array(':statistics_scale' => \Drupal::state()->get('statistics.node_counter_scale') ?: 0),
-      ),
-    );
+        'arguments' => [':statistics_scale' => \Drupal::state()->get('statistics.node_counter_scale') ?: 0],
+      ],
+    ];
   }
 }
 
diff --git a/core/modules/statistics/statistics.tokens.inc b/core/modules/statistics/statistics.tokens.inc
index e9d8ded4392606156cff49ffb0eb8c19782cce29..96500b8982781470605a9c8652a3ecd803e4ee52 100644
--- a/core/modules/statistics/statistics.tokens.inc
+++ b/core/modules/statistics/statistics.tokens.inc
@@ -11,23 +11,23 @@
  * Implements hook_token_info().
  */
 function statistics_token_info() {
-  $node['total-count'] = array(
+  $node['total-count'] = [
     'name' => t("Number of views"),
     'description' => t("The number of visitors who have read the node."),
-  );
-  $node['day-count'] = array(
+  ];
+  $node['day-count'] = [
     'name' => t("Views today"),
     'description' => t("The number of visitors who have read the node today."),
-  );
-  $node['last-view'] = array(
+  ];
+  $node['last-view'] = [
     'name' => t("Last view"),
     'description' => t("The date on which a visitor last read the node."),
     'type' => 'date',
-  );
+  ];
 
-  return array(
-    'tokens' => array('node' => $node),
-  );
+  return [
+    'tokens' => ['node' => $node],
+  ];
 }
 
 /**
@@ -36,7 +36,7 @@ function statistics_token_info() {
 function statistics_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
   $token_service = \Drupal::token();
 
-  $replacements = array();
+  $replacements = [];
 
   if ($type == 'node' & !empty($data['node'])) {
     $node = $data['node'];
@@ -58,7 +58,7 @@ function statistics_tokens($type, $tokens, array $data, array $options, Bubbleab
 
     if ($created_tokens = $token_service->findWithPrefix($tokens, 'last-view')) {
       $statistics = statistics_get($node->id());
-      $replacements += $token_service->generate('date', $created_tokens, array('date' => $statistics['timestamp']), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $created_tokens, ['date' => $statistics['timestamp']], $options, $bubbleable_metadata);
     }
   }
 
diff --git a/core/modules/statistics/statistics.views.inc b/core/modules/statistics/statistics.views.inc
index e8512518819fcd434eb88fbfc56d931137976cbe..03e73ffcfa5df1b1a26e65514bf5f807811dc183 100644
--- a/core/modules/statistics/statistics.views.inc
+++ b/core/modules/statistics/statistics.views.inc
@@ -11,66 +11,66 @@
 function statistics_views_data() {
   $data['node_counter']['table']['group']  = t('Content statistics');
 
-  $data['node_counter']['table']['join'] = array(
-    'node_field_data' => array(
+  $data['node_counter']['table']['join'] = [
+    'node_field_data' => [
       'left_field' => 'nid',
       'field' => 'nid',
-    ),
-  );
+    ],
+  ];
 
-  $data['node_counter']['totalcount'] = array(
+  $data['node_counter']['totalcount'] = [
     'title' => t('Total views'),
     'help' => t('The total number of times the node has been viewed.'),
-    'field' => array(
+    'field' => [
       'id' => 'statistics_numeric',
       'click sortable' => TRUE,
-     ),
-    'filter' => array(
+     ],
+    'filter' => [
       'id' => 'numeric',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'numeric',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['node_counter']['daycount'] = array(
+  $data['node_counter']['daycount'] = [
     'title' => t('Views today'),
     'help' => t('The total number of times the node has been viewed today.'),
-    'field' => array(
+    'field' => [
       'id' => 'statistics_numeric',
       'click sortable' => TRUE,
-     ),
-    'filter' => array(
+     ],
+    'filter' => [
       'id' => 'numeric',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'numeric',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
-  $data['node_counter']['timestamp'] = array(
+  $data['node_counter']['timestamp'] = [
     'title' => t('Most recent view'),
     'help' => t('The most recent time the node has been viewed.'),
-    'field' => array(
+    'field' => [
       'id' => 'node_counter_timestamp',
       'click sortable' => TRUE,
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'date',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'date',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
+    ],
+  ];
 
   return $data;
 }
diff --git a/core/modules/statistics/tests/src/Functional/StatisticsAttachedTest.php b/core/modules/statistics/tests/src/Functional/StatisticsAttachedTest.php
index 9ea6e942aa48119b371e49f8c8704e9d428afca8..787c35bff2a40faf8157b3a9c2c0a50e04ef3ba6 100644
--- a/core/modules/statistics/tests/src/Functional/StatisticsAttachedTest.php
+++ b/core/modules/statistics/tests/src/Functional/StatisticsAttachedTest.php
@@ -17,7 +17,7 @@ class StatisticsAttachedTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'statistics');
+  public static $modules = ['node', 'statistics'];
 
   /**
    * {@inheritdoc}
@@ -29,7 +29,7 @@ protected function setUp() {
 
     // Install "statistics_test_attached" and set it as the default theme.
     $theme = 'statistics_test_attached';
-    \Drupal::service('theme_handler')->install(array($theme));
+    \Drupal::service('theme_handler')->install([$theme]);
     $this->config('system.theme')
       ->set('default', $theme)
       ->save();
diff --git a/core/modules/statistics/tests/src/Functional/StatisticsTestBase.php b/core/modules/statistics/tests/src/Functional/StatisticsTestBase.php
index 97d90820c25431a70fbcf6cb5c3269147b4053dc..3be95e2ab6eec54d19601d2bc39fa7a42bfbcea9 100644
--- a/core/modules/statistics/tests/src/Functional/StatisticsTestBase.php
+++ b/core/modules/statistics/tests/src/Functional/StatisticsTestBase.php
@@ -14,7 +14,7 @@ abstract class StatisticsTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'block', 'ban', 'statistics');
+  public static $modules = ['node', 'block', 'ban', 'statistics'];
 
   /**
    * User with permissions to ban IP's.
@@ -28,18 +28,18 @@ protected function setUp() {
 
     // Create Basic page node type.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+      $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
     }
 
     // Create user.
-    $this->blockingUser = $this->drupalCreateUser(array(
+    $this->blockingUser = $this->drupalCreateUser([
       'access administration pages',
       'access site reports',
       'ban IP addresses',
       'administer blocks',
       'administer statistics',
       'administer users',
-    ));
+    ]);
     $this->drupalLogin($this->blockingUser);
 
     // Enable logging.
diff --git a/core/modules/statistics/tests/src/Functional/StatisticsTokenReplaceTest.php b/core/modules/statistics/tests/src/Functional/StatisticsTokenReplaceTest.php
index cc36e470cb2e418229082db7a50b2bdd713df0be..8cf95adb4f7c93d4b19283df4dba45c024a7f9b9 100644
--- a/core/modules/statistics/tests/src/Functional/StatisticsTokenReplaceTest.php
+++ b/core/modules/statistics/tests/src/Functional/StatisticsTokenReplaceTest.php
@@ -16,24 +16,24 @@ function testStatisticsTokenReplacement() {
     $language_interface = \Drupal::languageManager()->getCurrentLanguage();
 
     // Create user and node.
-    $user = $this->drupalCreateUser(array('create page content'));
+    $user = $this->drupalCreateUser(['create page content']);
     $this->drupalLogin($user);
-    $node = $this->drupalCreateNode(array('type' => 'page', 'uid' => $user->id()));
+    $node = $this->drupalCreateNode(['type' => 'page', 'uid' => $user->id()]);
 
     // Hit the node.
     $this->drupalGet('node/' . $node->id());
     // Manually calling statistics.php, simulating ajax behavior.
     $nid = $node->id();
-    $post = http_build_query(array('nid' => $nid));
-    $headers = array('Content-Type' => 'application/x-www-form-urlencoded');
+    $post = http_build_query(['nid' => $nid]);
+    $headers = ['Content-Type' => 'application/x-www-form-urlencoded'];
     global $base_url;
     $stats_path = $base_url . '/' . drupal_get_path('module', 'statistics') . '/statistics.php';
     $client = \Drupal::httpClient();
-    $client->post($stats_path, array('headers' => $headers, 'body' => $post));
+    $client->post($stats_path, ['headers' => $headers, 'body' => $post]);
     $statistics = statistics_get($node->id());
 
     // Generate and test tokens.
-    $tests = array();
+    $tests = [];
     $tests['[node:total-count]'] = 1;
     $tests['[node:day-count]'] = 1;
     $tests['[node:last-view]'] = format_date($statistics['timestamp']);
@@ -43,8 +43,8 @@ function testStatisticsTokenReplacement() {
     $this->assertFalse(in_array(0, array_map('strlen', $tests)), 'No empty tokens generated.');
 
     foreach ($tests as $input => $expected) {
-      $output = \Drupal::token()->replace($input, array('node' => $node), array('langcode' => $language_interface->getId()));
-      $this->assertEqual($output, $expected, format_string('Statistics token %token replaced.', array('%token' => $input)));
+      $output = \Drupal::token()->replace($input, ['node' => $node], ['langcode' => $language_interface->getId()]);
+      $this->assertEqual($output, $expected, format_string('Statistics token %token replaced.', ['%token' => $input]));
     }
   }
 
diff --git a/core/modules/statistics/tests/src/Kernel/Migrate/d6/MigrateStatisticsConfigsTest.php b/core/modules/statistics/tests/src/Kernel/Migrate/d6/MigrateStatisticsConfigsTest.php
index 6bd53948a09e5021f6c11a1f3ab1215078f2e87d..da6ab300e738c412786c0eeb07441b77e4914f80 100644
--- a/core/modules/statistics/tests/src/Kernel/Migrate/d6/MigrateStatisticsConfigsTest.php
+++ b/core/modules/statistics/tests/src/Kernel/Migrate/d6/MigrateStatisticsConfigsTest.php
@@ -17,7 +17,7 @@ class MigrateStatisticsConfigsTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('statistics');
+  public static $modules = ['statistics'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/statistics/tests/src/Kernel/Migrate/d7/MigrateStatisticsConfigsTest.php b/core/modules/statistics/tests/src/Kernel/Migrate/d7/MigrateStatisticsConfigsTest.php
index e5f915b14487f31af2ea1e8d11ebb67d3b1fdddf..36e270d8f667b1d4a48becc762cbadb36cb783b2 100644
--- a/core/modules/statistics/tests/src/Kernel/Migrate/d7/MigrateStatisticsConfigsTest.php
+++ b/core/modules/statistics/tests/src/Kernel/Migrate/d7/MigrateStatisticsConfigsTest.php
@@ -17,7 +17,7 @@ class MigrateStatisticsConfigsTest extends MigrateDrupal7TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('statistics');
+  public static $modules = ['statistics'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/syslog/src/Logger/SysLog.php b/core/modules/syslog/src/Logger/SysLog.php
index 002ecde5e89aaf8b34fe282cb7c9a6f143bcfa7d..c2b73dee3d0af63595013903f3c281140ee5460d 100644
--- a/core/modules/syslog/src/Logger/SysLog.php
+++ b/core/modules/syslog/src/Logger/SysLog.php
@@ -63,7 +63,7 @@ protected function openConnection() {
   /**
    * {@inheritdoc}
    */
-  public function log($level, $message, array $context = array()) {
+  public function log($level, $message, array $context = []) {
     global $base_url;
 
     // Ensure we have a connection available.
@@ -73,7 +73,7 @@ public function log($level, $message, array $context = array()) {
     $message_placeholders = $this->parser->parseMessagePlaceholders($message, $context);
     $message = empty($message_placeholders) ? $message : strtr($message, $message_placeholders);
 
-    $entry = strtr($this->config->get('format'), array(
+    $entry = strtr($this->config->get('format'), [
       '!base_url' => $base_url,
       '!timestamp' => $context['timestamp'],
       '!type' => $context['channel'],
@@ -83,7 +83,7 @@ public function log($level, $message, array $context = array()) {
       '!uid' => $context['uid'],
       '!link' => strip_tags($context['link']),
       '!message' => strip_tags($message),
-    ));
+    ]);
 
     syslog($level, $entry);
   }
diff --git a/core/modules/syslog/src/Tests/SyslogTest.php b/core/modules/syslog/src/Tests/SyslogTest.php
index a40847c2aeb21f40a631efb1d0c879fbb7363239..f4ab7080eeeeaa1e5838ad15db27fb72eac050ad 100644
--- a/core/modules/syslog/src/Tests/SyslogTest.php
+++ b/core/modules/syslog/src/Tests/SyslogTest.php
@@ -16,23 +16,23 @@ class SyslogTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('syslog');
+  public static $modules = ['syslog'];
 
   /**
    * Tests the syslog settings page.
    */
   function testSettings() {
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
 
     // If we're on Windows, there is no configuration form.
     if (defined('LOG_LOCAL6')) {
-      $this->drupalPostForm('admin/config/development/logging', array('syslog_facility' => LOG_LOCAL6), t('Save configuration'));
+      $this->drupalPostForm('admin/config/development/logging', ['syslog_facility' => LOG_LOCAL6], t('Save configuration'));
       $this->assertText(t('The configuration options have been saved.'));
 
       $this->drupalGet('admin/config/development/logging');
       if ($this->parse()) {
-        $field = $this->xpath('//option[@value=:value]', array(':value' => LOG_LOCAL6)); // Should be one field.
+        $field = $this->xpath('//option[@value=:value]', [':value' => LOG_LOCAL6]); // Should be one field.
         $this->assertTrue($field[0]['selected'] == 'selected', 'Facility value saved.');
       }
     }
diff --git a/core/modules/syslog/syslog.module b/core/modules/syslog/syslog.module
index 68fe6145262d1e1a89d0745b52c23e08ec316131..2722702d8b2fda4f1a9e042ac2a31d773e524aa9 100644
--- a/core/modules/syslog/syslog.module
+++ b/core/modules/syslog/syslog.module
@@ -17,7 +17,7 @@ function syslog_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.syslog':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Syslog module logs events by sending messages to the logging facility of your web server\'s operating system. Syslog is an operating system administrative logging tool that provides valuable information for use in system management and security auditing. Most suited to medium and large sites, Syslog provides filtering tools that allow messages to be routed by type and severity. For more information, see the <a href=":syslog">online documentation for the Syslog module</a>, as well as PHP\'s documentation pages for the <a href="http://php.net/manual/function.openlog.php">openlog</a> and <a href="http://php.net/manual/function.syslog.php">syslog</a> functions.', array(':syslog' => 'https://www.drupal.org/documentation/modules/syslog')) . '</p>';
+      $output .= '<p>' . t('The Syslog module logs events by sending messages to the logging facility of your web server\'s operating system. Syslog is an operating system administrative logging tool that provides valuable information for use in system management and security auditing. Most suited to medium and large sites, Syslog provides filtering tools that allow messages to be routed by type and severity. For more information, see the <a href=":syslog">online documentation for the Syslog module</a>, as well as PHP\'s documentation pages for the <a href="http://php.net/manual/function.openlog.php">openlog</a> and <a href="http://php.net/manual/function.syslog.php">syslog</a> functions.', [':syslog' => 'https://www.drupal.org/documentation/modules/syslog']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Logging for UNIX, Linux, and Mac OS X') . '</dt>';
@@ -35,27 +35,27 @@ function syslog_help($route_name, RouteMatchInterface $route_match) {
 function syslog_form_system_logging_settings_alter(&$form, FormStateInterface $form_state) {
   $config = \Drupal::configFactory()->getEditable('syslog.settings');
   $help = \Drupal::moduleHandler()->moduleExists('help') ? ' ' . \Drupal::l(t('More information'), new Url('help.page', ['name' => 'syslog'])) . '.' : NULL;
-  $form['syslog_identity'] = array(
+  $form['syslog_identity'] = [
     '#type'          => 'textfield',
     '#title'         => t('Syslog identity'),
     '#default_value' => $config->get('identity'),
     '#description'   => t('A string that will be prepended to every message logged to Syslog. If you have multiple sites logging to the same Syslog log file, a unique identity per site makes it easy to tell the log entries apart.') . $help,
-  );
+  ];
   if (defined('LOG_LOCAL0')) {
-    $form['syslog_facility'] = array(
+    $form['syslog_facility'] = [
       '#type'          => 'select',
       '#title'         => t('Syslog facility'),
       '#default_value' => $config->get('facility'),
       '#options'       => syslog_facility_list(),
       '#description'   => t('Depending on the system configuration, Syslog and other logging tools use this code to identify or filter messages from within the entire system log.') . $help,
-     );
+     ];
   }
-  $form['syslog_format'] = array(
+  $form['syslog_format'] = [
     '#type'          => 'textarea',
     '#title'         => t('Syslog format'),
     '#default_value' => $config->get('format'),
     '#description'   => t('Specify the format of the syslog entry. Available variables are: <dl><dt><code>!base_url</code></dt><dd>Base URL of the site.</dd><dt><code>!timestamp</code></dt><dd>Unix timestamp of the log entry.</dd><dt><code>!type</code></dt><dd>The category to which this message belongs.</dd><dt><code>!ip</code></dt><dd>IP address of the user triggering the message.</dd><dt><code>!request_uri</code></dt><dd>The requested URI.</dd><dt><code>!referer</code></dt><dd>HTTP Referer if available.</dd><dt><code>!uid</code></dt><dd>User ID.</dd><dt><code>!link</code></dt><dd>A link to associate with the message.</dd><dt><code>!message</code></dt><dd>The message to store in the log.</dd></dl>'),
-  );
+  ];
 
   $form['#submit'][] = 'syslog_logging_settings_submit';
 }
@@ -80,7 +80,7 @@ function syslog_logging_settings_submit($form, FormStateInterface $form_state) {
  *   An array of syslog facilities for UNIX/Linux.
  */
 function syslog_facility_list() {
-  return array(
+  return [
     LOG_LOCAL0 => 'LOG_LOCAL0',
     LOG_LOCAL1 => 'LOG_LOCAL1',
     LOG_LOCAL2 => 'LOG_LOCAL2',
@@ -89,5 +89,5 @@ function syslog_facility_list() {
     LOG_LOCAL5 => 'LOG_LOCAL5',
     LOG_LOCAL6 => 'LOG_LOCAL6',
     LOG_LOCAL7 => 'LOG_LOCAL7',
-  );
+  ];
 }
diff --git a/core/modules/syslog/tests/src/Kernel/Migrate/d6/MigrateSyslogConfigsTest.php b/core/modules/syslog/tests/src/Kernel/Migrate/d6/MigrateSyslogConfigsTest.php
index 39a71a30c83c67bb1afd1254c5d89a068dec309b..aa66203113d6ff96680c44567931d00c82a24247 100644
--- a/core/modules/syslog/tests/src/Kernel/Migrate/d6/MigrateSyslogConfigsTest.php
+++ b/core/modules/syslog/tests/src/Kernel/Migrate/d6/MigrateSyslogConfigsTest.php
@@ -17,7 +17,7 @@ class MigrateSyslogConfigsTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('syslog');
+  public static $modules = ['syslog'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/system/src/Controller/AdminController.php b/core/modules/system/src/Controller/AdminController.php
index 57c13f653d4fbc415bc72eab40a6966e3ce09647..3da4b0901dc9b93bdfa4e74427e3888c070e9633 100644
--- a/core/modules/system/src/Controller/AdminController.php
+++ b/core/modules/system/src/Controller/AdminController.php
@@ -23,13 +23,13 @@ public function index() {
     }
 
     uasort($module_info, 'system_sort_modules_by_info_name');
-    $menu_items = array();
+    $menu_items = [];
 
     foreach ($module_info as $module => $info) {
       // Only display a section if there are any available tasks.
       if ($admin_tasks = system_get_module_admin_tasks($module, $info->info)) {
         // Sort links by title.
-        uasort($admin_tasks, array('\Drupal\Component\Utility\SortArray', 'sortByTitleElement'));
+        uasort($admin_tasks, ['\Drupal\Component\Utility\SortArray', 'sortByTitleElement']);
         // Move 'Configure permissions' links to the bottom of each section.
         $permission_key = "user.admin_permissions.$module";
         if (isset($admin_tasks[$permission_key])) {
@@ -38,14 +38,14 @@ public function index() {
           $admin_tasks[$permission_key] = $permission_task;
         }
 
-        $menu_items[$info->info['name']] = array($info->info['description'], $admin_tasks);
+        $menu_items[$info->info['name']] = [$info->info['description'], $admin_tasks];
       }
     }
 
-    $output = array(
+    $output = [
       '#theme' => 'system_admin_index',
       '#menu_items' => $menu_items,
-    );
+    ];
 
     return $output;
   }
diff --git a/core/modules/system/src/Controller/DbUpdateController.php b/core/modules/system/src/Controller/DbUpdateController.php
index fdedcc652e819f99f90e4d2fb4d3efba2733d420..9e0a374a4a86664e74c2ddeb3e5ef86d482487ff 100644
--- a/core/modules/system/src/Controller/DbUpdateController.php
+++ b/core/modules/system/src/Controller/DbUpdateController.php
@@ -150,7 +150,7 @@ public function handle($op, Request $request) {
       $_SESSION['update_ignore_warnings'] = TRUE;
     }
 
-    $regions = array();
+    $regions = [];
     $requirements = update_check_requirements();
     $severity = drupal_requirements_severity($requirements);
     if ($severity == REQUIREMENT_ERROR || ($severity == REQUIREMENT_WARNING && empty($_SESSION['update_ignore_warnings']))) {
@@ -212,32 +212,32 @@ protected function info(Request $request) {
     $this->keyValueExpirableFactory->get('update')->deleteAll();
     $this->keyValueExpirableFactory->get('update_available_release')->deleteAll();
 
-    $build['info_header'] = array(
+    $build['info_header'] = [
       '#markup' => '<p>' . $this->t('Use this utility to update your database whenever a new release of Drupal or a module is installed.') . '</p><p>' . $this->t('For more detailed information, see the <a href="https://www.drupal.org/upgrade">upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.') . '</p>',
-    );
+    ];
 
     $info[] = $this->t("<strong>Back up your code</strong>. Hint: when backing up module code, do not leave that backup in the 'modules' or 'sites/*/modules' directories as this may confuse Drupal's auto-discovery mechanism.");
-    $info[] = $this->t('Put your site into <a href=":url">maintenance mode</a>.', array(
+    $info[] = $this->t('Put your site into <a href=":url">maintenance mode</a>.', [
       ':url' => Url::fromRoute('system.site_maintenance_mode')->toString(TRUE)->getGeneratedUrl(),
-    ));
+    ]);
     $info[] = $this->t('<strong>Back up your database</strong>. This process will change your database values and in case of emergency you may need to revert to a backup.');
     $info[] = $this->t('Install your new files in the appropriate location, as described in the handbook.');
-    $build['info'] = array(
+    $build['info'] = [
       '#theme' => 'item_list',
       '#list_type' => 'ol',
       '#items' => $info,
-    );
-    $build['info_footer'] = array(
+    ];
+    $build['info_footer'] = [
       '#markup' => '<p>' . $this->t('When you have performed the steps above, you may proceed.') . '</p>',
-    );
+    ];
 
-    $build['link'] = array(
+    $build['link'] = [
       '#type' => 'link',
       '#title' => $this->t('Continue'),
-      '#attributes' => array('class' => array('button', 'button--primary')),
+      '#attributes' => ['class' => ['button', 'button--primary']],
       // @todo Revisit once https://www.drupal.org/node/2548095 is in.
       '#url' => Url::fromUri('base://selection'),
-    );
+    ];
     return $build;
   }
 
@@ -256,15 +256,15 @@ protected function selection(Request $request) {
 
     $count = 0;
     $incompatible_count = 0;
-    $build['start'] = array(
+    $build['start'] = [
       '#tree' => TRUE,
       '#type' => 'details',
-    );
+    ];
 
     // Ensure system.module's updates appear first.
-    $build['start']['system'] = array();
+    $build['start']['system'] = [];
 
-    $starting_updates = array();
+    $starting_updates = [];
     $incompatible_updates_exist = FALSE;
     $updates_per_module = [];
     foreach (['update', 'post_update'] as $update_type) {
@@ -278,30 +278,30 @@ protected function selection(Request $request) {
       }
       foreach ($updates as $module => $update) {
         if (!isset($update['start'])) {
-          $build['start'][$module] = array(
+          $build['start'][$module] = [
             '#type' => 'item',
             '#title' => $module . ' module',
             '#markup' => $update['warning'],
             '#prefix' => '<div class="messages messages--warning">',
             '#suffix' => '</div>',
-          );
+          ];
           $incompatible_updates_exist = TRUE;
           continue;
         }
         if (!empty($update['pending'])) {
           $updates_per_module += [$module => []];
           $updates_per_module[$module] = array_merge($updates_per_module[$module], $update['pending']);
-          $build['start'][$module] = array(
+          $build['start'][$module] = [
             '#type' => 'hidden',
             '#value' => $update['start'],
-          );
+          ];
           // Store the previous items in order to merge normal updates and
           // post_update functions together.
-          $build['start'][$module] = array(
+          $build['start'][$module] = [
             '#theme' => 'item_list',
             '#items' => $updates_per_module[$module],
             '#title' => $module . ' module',
-          );
+          ];
 
           if ($update_type === 'update') {
             $starting_updates[$module] = $update['start'];
@@ -329,7 +329,7 @@ protected function selection(Request $request) {
           $build['start'][$module_update_key]['#items'][$data['number']] .= '<div class="warning">' . $text . '</div>';
         }
         // Move the module containing this update to the top of the list.
-        $build['start'] = array($module_update_key => $build['start'][$module_update_key]) + $build['start'];
+        $build['start'] = [$module_update_key => $build['start'][$module_update_key]] + $build['start'];
       }
     }
 
@@ -341,25 +341,25 @@ protected function selection(Request $request) {
     if (empty($count)) {
       drupal_set_message($this->t('No pending updates.'));
       unset($build);
-      $build['links'] = array(
+      $build['links'] = [
         '#theme' => 'links',
         '#links' => $this->helpfulLinks($request),
-      );
+      ];
 
       // No updates to run, so caches won't get flushed later.  Clear them now.
       drupal_flush_all_caches();
     }
     else {
-      $build['help'] = array(
+      $build['help'] = [
         '#markup' => '<p>' . $this->t('The version of Drupal you are updating from has been automatically detected.') . '</p>',
         '#weight' => -5,
-      );
+      ];
       if ($incompatible_count) {
         $build['start']['#title'] = $this->formatPlural(
           $count,
           '1 pending update (@number_applied to be applied, @number_incompatible skipped)',
           '@count pending updates (@number_applied to be applied, @number_incompatible skipped)',
-          array('@number_applied' => $count - $incompatible_count, '@number_incompatible' => $incompatible_count)
+          ['@number_applied' => $count - $incompatible_count, '@number_incompatible' => $incompatible_count]
         );
       }
       else {
@@ -367,15 +367,15 @@ protected function selection(Request $request) {
       }
       // @todo Simplify with https://www.drupal.org/node/2548095
       $base_url = str_replace('/update.php', '', $request->getBaseUrl());
-      $url = (new Url('system.db_update', array('op' => 'run')))->setOption('base_url', $base_url);
-      $build['link'] = array(
+      $url = (new Url('system.db_update', ['op' => 'run']))->setOption('base_url', $base_url);
+      $build['link'] = [
         '#type' => 'link',
         '#title' => $this->t('Apply pending updates'),
-        '#attributes' => array('class' => array('button', 'button--primary')),
+        '#attributes' => ['class' => ['button', 'button--primary']],
         '#weight' => 5,
         '#url' => $url,
         '#access' => $url->access($this->currentUser()),
-      );
+      ];
     }
 
     return $build;
@@ -397,24 +397,24 @@ protected function results(Request $request) {
     // Report end result.
     $dblog_exists = $this->moduleHandler->moduleExists('dblog');
     if ($dblog_exists && $this->account->hasPermission('access site reports')) {
-      $log_message = $this->t('All errors have been <a href=":url">logged</a>.', array(
+      $log_message = $this->t('All errors have been <a href=":url">logged</a>.', [
         ':url' => Url::fromRoute('dblog.overview')->setOption('base_url', $base_url)->toString(TRUE)->getGeneratedUrl(),
-      ));
+      ]);
     }
     else {
       $log_message = $this->t('All errors have been logged.');
     }
 
     if (!empty($_SESSION['update_success'])) {
-      $message = '<p>' . $this->t('Updates were attempted. If you see no failures below, you may proceed happily back to your <a href=":url">site</a>. Otherwise, you may need to update your database manually.', array(':url' => Url::fromRoute('<front>')->setOption('base_url', $base_url)->toString(TRUE)->getGeneratedUrl())) . ' ' . $log_message . '</p>';
+      $message = '<p>' . $this->t('Updates were attempted. If you see no failures below, you may proceed happily back to your <a href=":url">site</a>. Otherwise, you may need to update your database manually.', [':url' => Url::fromRoute('<front>')->setOption('base_url', $base_url)->toString(TRUE)->getGeneratedUrl()]) . ' ' . $log_message . '</p>';
     }
     else {
       $last = reset($_SESSION['updates_remaining']);
       list($module, $version) = array_pop($last);
-      $message = '<p class="error">' . $this->t('The update process was aborted prematurely while running <strong>update #@version in @module.module</strong>.', array(
+      $message = '<p class="error">' . $this->t('The update process was aborted prematurely while running <strong>update #@version in @module.module</strong>.', [
         '@version' => $version,
         '@module' => $module,
-      )) . ' ' . $log_message;
+      ]) . ' ' . $log_message;
       if ($dblog_exists) {
         $message .= ' ' . $this->t('You may need to check the <code>watchdog</code> database table manually.');
       }
@@ -425,23 +425,23 @@ protected function results(Request $request) {
       $message .= '<p>' . $this->t("<strong>Reminder: don't forget to set the <code>\$settings['update_free_access']</code> value in your <code>settings.php</code> file back to <code>FALSE</code>.</strong>") . '</p>';
     }
 
-    $build['message'] = array(
+    $build['message'] = [
       '#markup' => $message,
-    );
-    $build['links'] = array(
+    ];
+    $build['links'] = [
       '#theme' => 'links',
       '#links' => $this->helpfulLinks($request),
-    );
+    ];
 
     // Output a list of info messages.
     if (!empty($_SESSION['update_results'])) {
-      $all_messages = array();
+      $all_messages = [];
       foreach ($_SESSION['update_results'] as $module => $updates) {
         if ($module != '#abort') {
           $module_has_message = FALSE;
-          $info_messages = array();
+          $info_messages = [];
           foreach ($updates as $name => $queries) {
-            $messages = array();
+            $messages = [];
             foreach ($queries as $query) {
               // If there is no message for this update, don't show anything.
               if (empty($query['query'])) {
@@ -449,16 +449,16 @@ protected function results(Request $request) {
               }
 
               if ($query['success']) {
-                $messages[] = array(
-                  '#wrapper_attributes' => array('class' => array('success')),
+                $messages[] = [
+                  '#wrapper_attributes' => ['class' => ['success']],
                   '#markup' => $query['query'],
-                );
+                ];
               }
               else {
-                $messages[] = array(
-                  '#wrapper_attributes' => array('class' => array('failure')),
+                $messages[] = [
+                  '#wrapper_attributes' => ['class' => ['failure']],
                   '#markup' => '<strong>' . $this->t('Failed:') . '</strong> ' . $query['query'],
-                );
+                ];
               }
             }
 
@@ -470,32 +470,32 @@ protected function results(Request $request) {
               else {
                 $title = $this->t('Update @name', ['@name' => trim($name, '_')]);
               }
-              $info_messages[] = array(
+              $info_messages[] = [
                 '#theme' => 'item_list',
                 '#items' => $messages,
                 '#title' => $title,
-              );
+              ];
             }
           }
 
           // If there were any messages then prefix them with the module name
           // and add it to the global message list.
           if ($module_has_message) {
-            $all_messages[] = array(
+            $all_messages[] = [
               '#type' => 'container',
-              '#prefix' => '<h3>' . $this->t('@module module', array('@module' => $module)) . '</h3>',
+              '#prefix' => '<h3>' . $this->t('@module module', ['@module' => $module]) . '</h3>',
               '#children' => $info_messages,
-            );
+            ];
           }
         }
       }
       if ($all_messages) {
-        $build['query_messages'] = array(
+        $build['query_messages'] = [
           '#type' => 'container',
           '#children' => $all_messages,
-          '#attributes' => array('class' => array('update-results')),
+          '#attributes' => ['class' => ['update-results']],
           '#prefix' => '<h2>' . $this->t('The following updates returned messages:') . '</h2>',
-        );
+        ];
       }
     }
     unset($_SESSION['update_results']);
@@ -515,17 +515,17 @@ protected function results(Request $request) {
    *   A render array.
    */
   public function requirements($severity, array $requirements, Request $request) {
-    $options = $severity == REQUIREMENT_WARNING ? array('continue' => 1) : array();
+    $options = $severity == REQUIREMENT_WARNING ? ['continue' => 1] : [];
     // @todo Revisit once https://www.drupal.org/node/2548095 is in. Something
     // like Url::fromRoute('system.db_update')->setOptions() should then be
     // possible.
     $try_again_url = Url::fromUri($request->getUriForPath(''))->setOptions(['query' => $options])->toString(TRUE)->getGeneratedUrl();
 
-    $build['status_report'] = array(
+    $build['status_report'] = [
       '#type' => 'status_report',
       '#requirements' => $requirements,
-      '#suffix' => $this->t('Check the messages and <a href=":url">try again</a>.', array(':url' => $try_again_url))
-    );
+      '#suffix' => $this->t('Check the messages and <a href=":url">try again</a>.', [':url' => $try_again_url])
+    ];
 
     $build['#title'] = $this->t('Requirements problem');
     return $build;
@@ -543,19 +543,19 @@ public function requirements($severity, array $requirements, Request $request) {
    */
   protected function updateTasksList($active = NULL) {
     // Default list of tasks.
-    $tasks = array(
+    $tasks = [
       'requirements' => $this->t('Verify requirements'),
       'info' => $this->t('Overview'),
       'selection' => $this->t('Review updates'),
       'run' => $this->t('Run updates'),
       'results' => $this->t('Review log'),
-    );
+    ];
 
-    $task_list = array(
+    $task_list = [
       '#theme' => 'maintenance_task_list',
       '#items' => $tasks,
       '#active' => $active,
-    );
+    ];
     return $task_list;
   }
 
@@ -576,7 +576,7 @@ protected function triggerBatch(Request $request) {
       $this->state->set('system.maintenance_mode', TRUE);
     }
 
-    $operations = array();
+    $operations = [];
 
     // Resolve any update dependencies to determine the actual updates that will
     // be run and the order they will be run in.
@@ -587,9 +587,9 @@ protected function triggerBatch(Request $request) {
     // batch API can pass in to the batch operation each time it is called. (We
     // do not store the entire update dependency array here because it is
     // potentially very large.)
-    $dependency_map = array();
+    $dependency_map = [];
     foreach ($updates as $function => $update) {
-      $dependency_map[$function] = !empty($update['reverse_paths']) ? array_keys($update['reverse_paths']) : array();
+      $dependency_map[$function] = !empty($update['reverse_paths']) ? array_keys($update['reverse_paths']) : [];
     }
 
     // Determine updates to be performed.
@@ -602,7 +602,7 @@ protected function triggerBatch(Request $request) {
           drupal_set_installed_schema_version($update['module'], $update['number'] - 1);
           unset($start[$update['module']]);
         }
-        $operations[] = array('update_do_one', array($update['module'], $update['number'], $dependency_map[$function]));
+        $operations[] = ['update_do_one', [$update['module'], $update['number'], $dependency_map[$function]]];
       }
     }
 
@@ -618,12 +618,12 @@ protected function triggerBatch(Request $request) {
     }
 
     $batch['operations'] = $operations;
-    $batch += array(
+    $batch += [
       'title' => $this->t('Updating'),
       'init_message' => $this->t('Starting updates'),
       'error_message' => $this->t('An unrecoverable error has occurred. You can find the error message below. It is advised to copy it to the clipboard for reference.'),
-      'finished' => array('\Drupal\system\Controller\DbUpdateController', 'batchFinished'),
-    );
+      'finished' => ['\Drupal\system\Controller\DbUpdateController', 'batchFinished'],
+    ];
     batch_set($batch);
 
     // @todo Revisit once https://www.drupal.org/node/2548095 is in.
@@ -673,15 +673,15 @@ public static function batchFinished($success, $results, $operations) {
   protected function helpfulLinks(Request $request) {
     // @todo Simplify with https://www.drupal.org/node/2548095
     $base_url = str_replace('/update.php', '', $request->getBaseUrl());
-    $links['front'] = array(
+    $links['front'] = [
       'title' => $this->t('Front page'),
       'url' => Url::fromRoute('<front>')->setOption('base_url', $base_url),
-    );
+    ];
     if ($this->account->hasPermission('access administration pages')) {
-      $links['admin-pages'] = array(
+      $links['admin-pages'] = [
         'title' => $this->t('Administration pages'),
         'url' => Url::fromRoute('system.admin')->setOption('base_url', $base_url),
-      );
+      ];
     }
     return $links;
   }
@@ -693,7 +693,7 @@ protected function helpfulLinks(Request $request) {
    *   The module updates that can be performed.
    */
   protected function getModuleUpdates() {
-    $return = array();
+    $return = [];
     $updates = update_get_update_list();
     foreach ($updates as $module => $update) {
       $return[$module] = $update['start'];
diff --git a/core/modules/system/src/Controller/EntityAutocompleteController.php b/core/modules/system/src/Controller/EntityAutocompleteController.php
index 53ec818f3009037949441961bc88d0f27041ccb8..974c2ded3374363bc5983877ee48af9a3e9b4449 100644
--- a/core/modules/system/src/Controller/EntityAutocompleteController.php
+++ b/core/modules/system/src/Controller/EntityAutocompleteController.php
@@ -77,7 +77,7 @@ public static function create(ContainerInterface $container) {
    *   or if it does not match the stored data.
    */
   public function handleAutocomplete(Request $request, $target_type, $selection_handler, $selection_settings_key) {
-    $matches = array();
+    $matches = [];
     // Get the typed string from the URL, if it exists.
     if ($input = $request->query->get('q')) {
       $typed_string = Tags::explode($input);
diff --git a/core/modules/system/src/Controller/SystemController.php b/core/modules/system/src/Controller/SystemController.php
index f25e83221714a793d2081e5ff68e54ca427c2529..4af1dcb856f4ac03d7f91f823f366f50684aa78f 100644
--- a/core/modules/system/src/Controller/SystemController.php
+++ b/core/modules/system/src/Controller/SystemController.php
@@ -100,19 +100,19 @@ public static function create(ContainerInterface $container) {
   public function overview($link_id) {
     // Check for status report errors.
     if ($this->systemManager->checkRequirements() && $this->currentUser()->hasPermission('administer site configuration')) {
-      drupal_set_message($this->t('One or more problems were detected with your Drupal installation. Check the <a href=":status">status report</a> for more information.', array(':status' => $this->url('system.status'))), 'error');
+      drupal_set_message($this->t('One or more problems were detected with your Drupal installation. Check the <a href=":status">status report</a> for more information.', [':status' => $this->url('system.status')]), 'error');
     }
     // Load all menu links below it.
     $parameters = new MenuTreeParameters();
     $parameters->setRoot($link_id)->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
     $tree = $this->menuLinkTree->load(NULL, $parameters);
-    $manipulators = array(
-      array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-      array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
-    );
+    $manipulators = [
+      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+      ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+    ];
     $tree = $this->menuLinkTree->transform($tree, $manipulators);
     $tree_access_cacheability = new CacheableMetadata();
-    $blocks = array();
+    $blocks = [];
     foreach ($tree as $key => $element) {
       $tree_access_cacheability = $tree_access_cacheability->merge(CacheableMetadata::createFromObject($element->access));
 
@@ -124,10 +124,10 @@ public function overview($link_id) {
       $link = $element->link;
       $block['title'] = $link->getTitle();
       $block['description'] = $link->getDescription();
-      $block['content'] = array(
+      $block['content'] = [
         '#theme' => 'admin_block_content',
         '#content' => $this->systemManager->getAdminBlock($link),
-      );
+      ];
 
       if (!empty($block['content']['#content'])) {
         $blocks[$key] = $block;
@@ -161,7 +161,7 @@ public function overview($link_id) {
    * @return \Symfony\Component\HttpFoundation\RedirectResponse
    */
   public function compactPage($mode) {
-    user_cookie_save(array('admin_compact_mode' => ($mode == 'on')));
+    user_cookie_save(['admin_compact_mode' => ($mode == 'on')]);
     return $this->redirect('<front>');
   }
 
@@ -187,9 +187,9 @@ public function themesPage() {
     uasort($themes, 'system_sort_modules_by_info_name');
 
     $theme_default = $config->get('default');
-    $theme_groups  = array('installed' => array(), 'uninstalled' => array());
+    $theme_groups  = ['installed' => [], 'uninstalled' => []];
     $admin_theme = $config->get('admin');
-    $admin_theme_options = array();
+    $admin_theme_options = [];
 
     foreach ($themes as &$theme) {
       if (!empty($theme->info['hidden'])) {
@@ -206,17 +206,17 @@ public function themesPage() {
         $theme_keys[] = $theme->getName();
       }
       else {
-        $theme_keys = array($theme->getName());
+        $theme_keys = [$theme->getName()];
       }
       // Look for a screenshot in the current theme or in its closest ancestor.
       foreach (array_reverse($theme_keys) as $theme_key) {
         if (isset($themes[$theme_key]) && file_exists($themes[$theme_key]->info['screenshot'])) {
-          $theme->screenshot = array(
+          $theme->screenshot = [
             'uri' => $themes[$theme_key]->info['screenshot'],
-            'alt' => $this->t('Screenshot for @theme theme', array('@theme' => $theme->info['name'])),
-            'title' => $this->t('Screenshot for @theme theme', array('@theme' => $theme->info['name'])),
-            'attributes' => array('class' => array('screenshot')),
-          );
+            'alt' => $this->t('Screenshot for @theme theme', ['@theme' => $theme->info['name']]),
+            'title' => $this->t('Screenshot for @theme theme', ['@theme' => $theme->info['name']]),
+            'attributes' => ['class' => ['screenshot']],
+          ];
           break;
         }
       }
@@ -233,16 +233,16 @@ public function themesPage() {
         // Confirm that the theme engine is available.
         $theme->incompatible_engine = isset($theme->info['engine']) && !isset($theme->owner);
       }
-      $theme->operations = array();
+      $theme->operations = [];
       if (!empty($theme->status) || !$theme->incompatible_core && !$theme->incompatible_php && !$theme->incompatible_base && !$theme->incompatible_engine) {
         // Create the operations links.
         $query['theme'] = $theme->getName();
         if ($this->themeAccess->checkAccess($theme->getName())) {
-          $theme->operations[] = array(
+          $theme->operations[] = [
             'title' => $this->t('Settings'),
             'url' => Url::fromRoute('system.theme_settings_theme', ['theme' => $theme->getName()]),
-            'attributes' => array('title' => $this->t('Settings for @theme theme', array('@theme' => $theme->info['name']))),
-          );
+            'attributes' => ['title' => $this->t('Settings for @theme theme', ['@theme' => $theme->info['name']])],
+          ];
         }
         if (!empty($theme->status)) {
           if (!$theme->is_default) {
@@ -257,40 +257,40 @@ public function themesPage() {
               }
             }
             if ($theme_uninstallable) {
-              $theme->operations[] = array(
+              $theme->operations[] = [
                 'title' => $this->t('Uninstall'),
                 'url' => Url::fromRoute('system.theme_uninstall'),
                 'query' => $query,
-                'attributes' => array('title' => $this->t('Uninstall @theme theme', array('@theme' => $theme->info['name']))),
-              );
+                'attributes' => ['title' => $this->t('Uninstall @theme theme', ['@theme' => $theme->info['name']])],
+              ];
             }
-            $theme->operations[] = array(
+            $theme->operations[] = [
               'title' => $this->t('Set as default'),
               'url' => Url::fromRoute('system.theme_set_default'),
               'query' => $query,
-              'attributes' => array('title' => $this->t('Set @theme as default theme', array('@theme' => $theme->info['name']))),
-            );
+              'attributes' => ['title' => $this->t('Set @theme as default theme', ['@theme' => $theme->info['name']])],
+            ];
           }
           $admin_theme_options[$theme->getName()] = $theme->info['name'];
         }
         else {
-          $theme->operations[] = array(
+          $theme->operations[] = [
             'title' => $this->t('Install'),
             'url' => Url::fromRoute('system.theme_install'),
             'query' => $query,
-            'attributes' => array('title' => $this->t('Install @theme theme', array('@theme' => $theme->info['name']))),
-          );
-          $theme->operations[] = array(
+            'attributes' => ['title' => $this->t('Install @theme theme', ['@theme' => $theme->info['name']])],
+          ];
+          $theme->operations[] = [
             'title' => $this->t('Install and set as default'),
             'url' => Url::fromRoute('system.theme_set_default'),
             'query' => $query,
-            'attributes' => array('title' => $this->t('Install @theme as default theme', array('@theme' => $theme->info['name']))),
-          );
+            'attributes' => ['title' => $this->t('Install @theme as default theme', ['@theme' => $theme->info['name']])],
+          ];
         }
       }
 
       // Add notes to default and administration theme.
-      $theme->notes = array();
+      $theme->notes = [];
       if ($theme->is_default) {
         $theme->notes[] = $this->t('default theme');
       }
@@ -303,9 +303,9 @@ public function themesPage() {
     }
 
     // There are two possible theme groups.
-    $theme_group_titles = array(
+    $theme_group_titles = [
       'installed' => $this->formatPlural(count($theme_groups['installed']), 'Installed theme', 'Installed themes'),
-    );
+    ];
     if (!empty($theme_groups['uninstalled'])) {
       $theme_group_titles['uninstalled'] = $this->formatPlural(count($theme_groups['uninstalled']), 'Uninstalled theme', 'Uninstalled themes');
     }
@@ -313,12 +313,12 @@ public function themesPage() {
     uasort($theme_groups['installed'], 'system_sort_themes');
     $this->moduleHandler()->alter('system_themes_page', $theme_groups);
 
-    $build = array();
-    $build[] = array(
+    $build = [];
+    $build[] = [
       '#theme' => 'system_themes_page',
       '#theme_groups' => $theme_groups,
       '#theme_group_titles' => $theme_group_titles,
-    );
+    ];
     $build[] = $this->formBuilder->getForm('Drupal\system\Form\ThemeAdminForm', $admin_theme_options);
 
     return $build;
diff --git a/core/modules/system/src/Controller/SystemInfoController.php b/core/modules/system/src/Controller/SystemInfoController.php
index 829d1fef55b70203d4becb8b96af29815ddda5e5..76c2c7a377560e174f16111059b7963e8985329e 100644
--- a/core/modules/system/src/Controller/SystemInfoController.php
+++ b/core/modules/system/src/Controller/SystemInfoController.php
@@ -63,7 +63,7 @@ public function php() {
       $output = ob_get_clean();
     }
     else {
-      $output = t('The phpinfo() function has been disabled for security reasons. For more information, visit <a href=":phpinfo">Enabling and disabling phpinfo()</a> handbook page.', array(':phpinfo' => 'https://www.drupal.org/node/243993'));
+      $output = t('The phpinfo() function has been disabled for security reasons. For more information, visit <a href=":phpinfo">Enabling and disabling phpinfo()</a> handbook page.', [':phpinfo' => 'https://www.drupal.org/node/243993']);
     }
     return new Response($output);
   }
diff --git a/core/modules/system/src/Controller/ThemeController.php b/core/modules/system/src/Controller/ThemeController.php
index e1353561ddbdf6b9cc706b3149834259b5ee3cd0..9160085bee645e5c6c16b531eaf5e0a98a991a1e 100644
--- a/core/modules/system/src/Controller/ThemeController.php
+++ b/core/modules/system/src/Controller/ThemeController.php
@@ -71,15 +71,15 @@ public function uninstall(Request $request) {
       if (!empty($themes[$theme])) {
         // Do not uninstall the default or admin theme.
         if ($theme === $config->get('default') || $theme === $config->get('admin')) {
-          drupal_set_message($this->t('%theme is the default theme and cannot be uninstalled.', array('%theme' => $themes[$theme]->info['name'])), 'error');
+          drupal_set_message($this->t('%theme is the default theme and cannot be uninstalled.', ['%theme' => $themes[$theme]->info['name']]), 'error');
         }
         else {
-          $this->themeHandler->uninstall(array($theme));
-          drupal_set_message($this->t('The %theme theme has been uninstalled.', array('%theme' => $themes[$theme]->info['name'])));
+          $this->themeHandler->uninstall([$theme]);
+          drupal_set_message($this->t('The %theme theme has been uninstalled.', ['%theme' => $themes[$theme]->info['name']]));
         }
       }
       else {
-        drupal_set_message($this->t('The %theme theme was not found.', array('%theme' => $theme)), 'error');
+        drupal_set_message($this->t('The %theme theme was not found.', ['%theme' => $theme]), 'error');
       }
 
       return $this->redirect('system.themes_page');
@@ -106,12 +106,12 @@ public function install(Request $request) {
 
     if (isset($theme)) {
       try {
-        if ($this->themeHandler->install(array($theme))) {
+        if ($this->themeHandler->install([$theme])) {
           $themes = $this->themeHandler->listInfo();
-          drupal_set_message($this->t('The %theme theme has been installed.', array('%theme' => $themes[$theme]->info['name'])));
+          drupal_set_message($this->t('The %theme theme has been installed.', ['%theme' => $themes[$theme]->info['name']]));
         }
         else {
-          drupal_set_message($this->t('The %theme theme was not found.', array('%theme' => $theme)), 'error');
+          drupal_set_message($this->t('The %theme theme was not found.', ['%theme' => $theme]), 'error');
         }
       }
       catch (PreExistingConfigException $e) {
@@ -121,10 +121,10 @@ public function install(Request $request) {
             count($config_objects),
             'Unable to install @extension, %config_names already exists in active configuration.',
             'Unable to install @extension, %config_names already exist in active configuration.',
-            array(
+            [
               '%config_names' => implode(', ', $config_objects),
               '@extension' => $theme,
-            )),
+            ]),
           'error'
         );
       }
@@ -160,7 +160,7 @@ public function setDefaultTheme(Request $request) {
 
       // Check if the specified theme is one recognized by the system.
       // Or try to install the theme.
-      if (isset($themes[$theme]) || $this->themeHandler->install(array($theme))) {
+      if (isset($themes[$theme]) || $this->themeHandler->install([$theme])) {
         $themes = $this->themeHandler->listInfo();
 
         // Set the default theme.
@@ -171,17 +171,17 @@ public function setDefaultTheme(Request $request) {
         // theme.
         $admin_theme = $config->get('admin');
         if ($admin_theme != 0 && $admin_theme != $theme) {
-          drupal_set_message($this->t('Please note that the administration theme is still set to the %admin_theme theme; consequently, the theme on this page remains unchanged. All non-administrative sections of the site, however, will show the selected %selected_theme theme by default.', array(
+          drupal_set_message($this->t('Please note that the administration theme is still set to the %admin_theme theme; consequently, the theme on this page remains unchanged. All non-administrative sections of the site, however, will show the selected %selected_theme theme by default.', [
             '%admin_theme' => $themes[$admin_theme]->info['name'],
             '%selected_theme' => $themes[$theme]->info['name'],
-          )));
+          ]));
         }
         else {
-          drupal_set_message($this->t('%theme is now the default theme.', array('%theme' => $themes[$theme]->info['name'])));
+          drupal_set_message($this->t('%theme is now the default theme.', ['%theme' => $themes[$theme]->info['name']]));
         }
       }
       else {
-        drupal_set_message($this->t('The %theme theme was not found.', array('%theme' => $theme)), 'error');
+        drupal_set_message($this->t('The %theme theme was not found.', ['%theme' => $theme]), 'error');
       }
 
       return $this->redirect('system.themes_page');
diff --git a/core/modules/system/src/DateFormatAccessControlHandler.php b/core/modules/system/src/DateFormatAccessControlHandler.php
index 597d6cdbb5b7f0ca4d86be2c6855f4832023b4d5..c9cee601ec3896630c0b0d4a6a95720dd84c7549 100644
--- a/core/modules/system/src/DateFormatAccessControlHandler.php
+++ b/core/modules/system/src/DateFormatAccessControlHandler.php
@@ -23,7 +23,7 @@ protected function checkAccess(EntityInterface $entity, $operation, AccountInter
       return AccessResult::allowed();
     }
     // Locked date formats cannot be updated or deleted.
-    elseif (in_array($operation, array('update', 'delete'))) {
+    elseif (in_array($operation, ['update', 'delete'])) {
       if ($entity->isLocked()) {
         return AccessResult::forbidden()->addCacheableDependency($entity);
       }
diff --git a/core/modules/system/src/Entity/Action.php b/core/modules/system/src/Entity/Action.php
index 9b27616eb9541ef73edb7dff7ed7c5ff1485a6a4..a4128384e2cf06b777b273c5f9d98d0e463c4266 100644
--- a/core/modules/system/src/Entity/Action.php
+++ b/core/modules/system/src/Entity/Action.php
@@ -57,7 +57,7 @@ class Action extends ConfigEntityBase implements ActionConfigEntityInterface, En
    *
    * @var array
    */
-  protected $configuration = array();
+  protected $configuration = [];
 
   /**
    * The plugin ID of the action.
@@ -90,7 +90,7 @@ protected function getPluginCollection() {
    * {@inheritdoc}
    */
   public function getPluginCollections() {
-    return array('configuration' => $this->getPluginCollection());
+    return ['configuration' => $this->getPluginCollection()];
   }
 
   /**
diff --git a/core/modules/system/src/EventSubscriber/AdminRouteSubscriber.php b/core/modules/system/src/EventSubscriber/AdminRouteSubscriber.php
index 33eab0223549d87d9febcf98a0f8b61bf2a72ac4..b83fe7e130585a71805b2f65e09911aa56f8114f 100644
--- a/core/modules/system/src/EventSubscriber/AdminRouteSubscriber.php
+++ b/core/modules/system/src/EventSubscriber/AdminRouteSubscriber.php
@@ -31,7 +31,7 @@ public static function getSubscribedEvents() {
     // Use a lower priority than \Drupal\field_ui\Routing\RouteSubscriber or
     // \Drupal\views\EventSubscriber\RouteSubscriber to ensure we add the option
     // to their routes.
-    $events[RoutingEvents::ALTER] = array('onAlterRoutes', -200);
+    $events[RoutingEvents::ALTER] = ['onAlterRoutes', -200];
 
     return $events;
   }
diff --git a/core/modules/system/src/FileDownloadController.php b/core/modules/system/src/FileDownloadController.php
index 8c95de2c9aac76e3b3e20853f7f5f5497655e9af..08b1632b28b2bbd439b0fd9f4a90677e091df4bb 100644
--- a/core/modules/system/src/FileDownloadController.php
+++ b/core/modules/system/src/FileDownloadController.php
@@ -45,7 +45,7 @@ public function download(Request $request, $scheme = 'private') {
 
     if (file_stream_wrapper_valid_scheme($scheme) && file_exists($uri)) {
       // Let other modules provide headers and controls access to the file.
-      $headers = $this->moduleHandler()->invokeAll('file_download', array($uri));
+      $headers = $this->moduleHandler()->invokeAll('file_download', [$uri]);
 
       foreach ($headers as $result) {
         if ($result == -1) {
diff --git a/core/modules/system/src/Form/CronForm.php b/core/modules/system/src/Form/CronForm.php
index d19915dced220c769cba41646854baa793311b62..d4726aac575220a81e8f8dcbc6dd8844716d5c2a 100644
--- a/core/modules/system/src/Form/CronForm.php
+++ b/core/modules/system/src/Form/CronForm.php
@@ -98,27 +98,27 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['description'] = array(
+    $form['description'] = [
       '#markup' => '<p>' . t('Cron takes care of running periodic tasks like checking for updates and indexing content for search.') . '</p>',
-    );
-    $form['run'] = array(
+    ];
+    $form['run'] = [
       '#type' => 'submit',
       '#value' => t('Run cron'),
-    );
-    $status = '<p>' . $this->t('Last run: %time ago.', array('%time' => $this->dateFormatter->formatTimeDiffSince($this->state->get('system.cron_last')))) . '</p>';
-    $form['status'] = array(
+    ];
+    $status = '<p>' . $this->t('Last run: %time ago.', ['%time' => $this->dateFormatter->formatTimeDiffSince($this->state->get('system.cron_last'))]) . '</p>';
+    $form['status'] = [
       '#markup' => $status,
-    );
+    ];
 
-    $cron_url = $this->url('system.cron', array('key' => $this->state->get('system.cron_key')), array('absolute' => TRUE));
-    $form['cron_url'] = array(
-      '#markup' => '<p>' . t('To run cron from outside the site, go to <a href=":cron">@cron</a>', array(':cron' => $cron_url, '@cron' => $cron_url)) . '</p>',
-    );
+    $cron_url = $this->url('system.cron', ['key' => $this->state->get('system.cron_key')], ['absolute' => TRUE]);
+    $form['cron_url'] = [
+      '#markup' => '<p>' . t('To run cron from outside the site, go to <a href=":cron">@cron</a>', [':cron' => $cron_url, '@cron' => $cron_url]) . '</p>',
+    ];
 
     if (!$this->moduleHandler->moduleExists('automated_cron')) {
-      $form['automated_cron'] = array(
+      $form['automated_cron'] = [
         '#markup' => $this->t('Enable the <em>Automated Cron</em> module to allow cron execution at the end of a server response.'),
-      );
+      ];
     }
 
     $form['cron'] = [
@@ -127,12 +127,12 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#open' => TRUE,
     ];
 
-    $form['cron']['logging'] = array(
+    $form['cron']['logging'] = [
       '#type' => 'checkbox',
       '#title' => t('Detailed cron logging'),
       '#default_value' => $this->config('system.cron')->get('logging'),
       '#description' => 'Run times of individual cron jobs will be written to watchdog',
-    );
+    ];
 
     $form['actions']['#type'] = 'actions';
     $form['actions']['submit'] = [
diff --git a/core/modules/system/src/Form/DateFormatDeleteForm.php b/core/modules/system/src/Form/DateFormatDeleteForm.php
index a8e1c04136fffa6a5c4a8ae717928559c8468a48..901c34b1abfd48530e4aae0775ab1742d23bae7c 100644
--- a/core/modules/system/src/Form/DateFormatDeleteForm.php
+++ b/core/modules/system/src/Form/DateFormatDeleteForm.php
@@ -41,9 +41,9 @@ public static function create(ContainerInterface $container) {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return t('Are you sure you want to delete the format %name : %format?', array(
+    return t('Are you sure you want to delete the format %name : %format?', [
       '%name' => $this->entity->label(),
-      '%format' => $this->dateFormatter->format(REQUEST_TIME, $this->entity->id()))
+      '%format' => $this->dateFormatter->format(REQUEST_TIME, $this->entity->id())]
     );
   }
 
diff --git a/core/modules/system/src/Form/DateFormatEditForm.php b/core/modules/system/src/Form/DateFormatEditForm.php
index cec00208ae1941206e015696ca7eef6f295855d2..c63c0d7ac9f1b34c171acb4af97f41bffcc8283f 100644
--- a/core/modules/system/src/Form/DateFormatEditForm.php
+++ b/core/modules/system/src/Form/DateFormatEditForm.php
@@ -15,7 +15,7 @@ class DateFormatEditForm extends DateFormatFormBase {
   public function form(array $form, FormStateInterface $form_state) {
     $form = parent::form($form, $form_state);
 
-    $now = t('Displayed as %date', array('%date' => $this->dateFormatter->format(REQUEST_TIME, $this->entity->id())));
+    $now = t('Displayed as %date', ['%date' => $this->dateFormatter->format(REQUEST_TIME, $this->entity->id())]);
     $form['date_format_pattern']['#field_suffix'] = ' <small data-drupal-date-formatter="preview">' . $now . '</small>';
     $form['date_format_pattern']['#default_value'] = $this->entity->getPattern();
 
diff --git a/core/modules/system/src/Form/DateFormatFormBase.php b/core/modules/system/src/Form/DateFormatFormBase.php
index adb24fa42dda350cae8b1e401dd18eec5b58809e..ed6714fc6833b1c80e88bc5314506978e5ba6240 100644
--- a/core/modules/system/src/Form/DateFormatFormBase.php
+++ b/core/modules/system/src/Form/DateFormatFormBase.php
@@ -76,26 +76,26 @@ public function exists($entity_id, array $element) {
    * {@inheritdoc}
    */
   public function form(array $form, FormStateInterface $form_state) {
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => 'Name',
       '#maxlength' => 100,
       '#description' => t('Name of the date format'),
       '#default_value' => $this->entity->label(),
-    );
+    ];
 
-    $form['id'] = array(
+    $form['id'] = [
       '#type' => 'machine_name',
       '#description' => t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
       '#disabled' => !$this->entity->isNew(),
       '#default_value' => $this->entity->id(),
-      '#machine_name' => array(
-        'exists' => array($this, 'exists'),
+      '#machine_name' => [
+        'exists' => [$this, 'exists'],
         'replace_pattern' => '([^a-z0-9_]+)|(^custom$)',
         'error' => $this->t('The machine-readable name must be unique, and can only contain lowercase letters, numbers, and underscores. Additionally, it can not be the reserved word "custom".'),
-      ),
-    );
-    $form['date_format_pattern'] = array(
+      ],
+    ];
+    $form['date_format_pattern'] = [
       '#type' => 'textfield',
       '#title' => t('Format string'),
       '#maxlength' => 100,
@@ -105,14 +105,14 @@ public function form(array $form, FormStateInterface $form_state) {
         'data-drupal-date-formatter' => 'source',
       ],
       '#field_suffix' => ' <small class="js-hide" data-drupal-date-formatter="preview">' . $this->t('Displayed as %date_format', ['%date_format' => '']) . '</small>',
-    );
+    ];
 
-    $form['langcode'] = array(
+    $form['langcode'] = [
       '#type' => 'language_select',
       '#title' => t('Language'),
       '#languages' => LanguageInterface::STATE_ALL,
       '#default_value' => $this->entity->language()->getId(),
-    );
+    ];
     $form['#attached']['drupalSettings']['dateFormats'] = $this->dateFormatter->getSampleDateFormats();
     $form['#attached']['library'][] = 'system/drupal.system.date';
     return parent::form($form, $form_state);
diff --git a/core/modules/system/src/Form/FileSystemForm.php b/core/modules/system/src/Form/FileSystemForm.php
index 9271bf4535288c924fc688b26808834fdbeedc9d..ff0b7924337a97b7cef65f0c1dc377e79c15f332 100644
--- a/core/modules/system/src/Form/FileSystemForm.php
+++ b/core/modules/system/src/Form/FileSystemForm.php
@@ -77,59 +77,59 @@ protected function getEditableConfigNames() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('system.file');
-    $form['file_public_path'] = array(
+    $form['file_public_path'] = [
       '#type' => 'item',
       '#title' => t('Public file system path'),
       '#markup' => PublicStream::basePath(),
       '#description' => t('A local file system path where public files will be stored. This directory must exist and be writable by Drupal. This directory must be relative to the Drupal installation directory and be accessible over the web. This must be changed in settings.php'),
-    );
+    ];
 
-    $form['file_public_base_url'] = array(
+    $form['file_public_base_url'] = [
       '#type' => 'item',
       '#title' => t('Public file base URL'),
       '#markup' => PublicStream::baseUrl(),
       '#description' => t('The base URL that will be used for public file URLs. This can be changed in settings.php'),
-    );
+    ];
 
-    $form['file_private_path'] = array(
+    $form['file_private_path'] = [
       '#type' => 'item',
       '#title' => t('Private file system path'),
       '#markup' => (PrivateStream::basePath() ? PrivateStream::basePath() : t('Not set')),
       '#description' => t('An existing local file system path for storing private files. It should be writable by Drupal and not accessible over the web. This must be changed in settings.php'),
-    );
+    ];
 
-    $form['file_temporary_path'] = array(
+    $form['file_temporary_path'] = [
       '#type' => 'textfield',
       '#title' => t('Temporary directory'),
       '#default_value' => $config->get('path.temporary'),
       '#maxlength' => 255,
       '#description' => t('A local file system path where temporary files will be stored. This directory should not be accessible over the web.'),
-      '#after_build' => array('system_check_directory'),
-    );
+      '#after_build' => ['system_check_directory'],
+    ];
     // Any visible, writeable wrapper can potentially be used for the files
     // directory, including a remote file system that integrates with a CDN.
     $options = $this->streamWrapperManager->getDescriptions(StreamWrapperInterface::WRITE_VISIBLE);
 
     if (!empty($options)) {
-      $form['file_default_scheme'] = array(
+      $form['file_default_scheme'] = [
         '#type' => 'radios',
         '#title' => t('Default download method'),
         '#default_value' => $config->get('default_scheme'),
         '#options' => $options,
         '#description' => t('This setting is used as the preferred download method. The use of public files is more efficient, but does not provide any access control.'),
-      );
+      ];
     }
 
-    $intervals = array(0, 21600, 43200, 86400, 604800, 2419200, 7776000);
-    $period = array_combine($intervals, array_map(array($this->dateFormatter, 'formatInterval'), $intervals));
+    $intervals = [0, 21600, 43200, 86400, 604800, 2419200, 7776000];
+    $period = array_combine($intervals, array_map([$this->dateFormatter, 'formatInterval'], $intervals));
     $period[0] = t('Never');
-    $form['temporary_maximum_age'] = array(
+    $form['temporary_maximum_age'] = [
       '#type' => 'select',
       '#title' => t('Delete orphaned files after'),
       '#default_value' => $config->get('temporary_maximum_age'),
       '#options' => $period,
       '#description' => t('Orphaned files are not referenced from any content but remain in the file system and may appear in administrative listings. <strong>Warning:</strong> If enabled, orphaned files will be permanently deleted and may not be recoverable.'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/system/src/Form/ImageToolkitForm.php b/core/modules/system/src/Form/ImageToolkitForm.php
index 39634aeaa98ab0b7d4c33876869ed02b55794efd..0e70b47a3b50f7dd97a19915b4ca707529dddff0 100644
--- a/core/modules/system/src/Form/ImageToolkitForm.php
+++ b/core/modules/system/src/Form/ImageToolkitForm.php
@@ -18,7 +18,7 @@ class ImageToolkitForm extends ConfigFormBase {
    *
    * @var \Drupal\Core\ImageToolkit\ImageToolkitInterface[]
    */
-  protected $availableToolkits = array();
+  protected $availableToolkits = [];
 
   /**
    * Constructs a ImageToolkitForm object.
@@ -66,30 +66,30 @@ protected function getEditableConfigNames() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $current_toolkit = $this->config('system.image')->get('toolkit');
 
-    $form['image_toolkit'] = array(
+    $form['image_toolkit'] = [
       '#type' => 'radios',
       '#title' => $this->t('Select an image processing toolkit'),
       '#default_value' => $current_toolkit,
-      '#options' => array(),
-    );
+      '#options' => [],
+    ];
 
     // If we have more than one image toolkit, allow the user to select the one
     // to use, and load each of the toolkits' settings form.
     foreach ($this->availableToolkits as $id => $toolkit) {
       $definition = $toolkit->getPluginDefinition();
       $form['image_toolkit']['#options'][$id] = $definition['title'];
-      $form['image_toolkit_settings'][$id] = array(
+      $form['image_toolkit_settings'][$id] = [
         '#type' => 'details',
-        '#title' => $this->t('@toolkit settings', array('@toolkit' => $definition['title'])),
+        '#title' => $this->t('@toolkit settings', ['@toolkit' => $definition['title']]),
         '#open' => TRUE,
         '#tree' => TRUE,
-        '#states' => array(
-          'visible' => array(
-            ':radio[name="image_toolkit"]' => array('value' => $id),
-          ),
-        ),
-      );
-      $form['image_toolkit_settings'][$id] += $toolkit->buildConfigurationForm(array(), $form_state);
+        '#states' => [
+          'visible' => [
+            ':radio[name="image_toolkit"]' => ['value' => $id],
+          ],
+        ],
+      ];
+      $form['image_toolkit_settings'][$id] += $toolkit->buildConfigurationForm([], $form_state);
     }
 
     return parent::buildForm($form, $form_state);
diff --git a/core/modules/system/src/Form/LoggingForm.php b/core/modules/system/src/Form/LoggingForm.php
index 22135e18ee5abf34e7a33546ca5ffa73f3f9e465..a305a4ff1d53bda8a8d471d8f83dd6243fd67722 100644
--- a/core/modules/system/src/Form/LoggingForm.php
+++ b/core/modules/system/src/Form/LoggingForm.php
@@ -29,18 +29,18 @@ protected function getEditableConfigNames() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('system.logging');
-    $form['error_level'] = array(
+    $form['error_level'] = [
       '#type' => 'radios',
       '#title' => t('Error messages to display'),
       '#default_value' => $config->get('error_level'),
-      '#options' => array(
+      '#options' => [
         ERROR_REPORTING_HIDE => t('None'),
         ERROR_REPORTING_DISPLAY_SOME => t('Errors and warnings'),
         ERROR_REPORTING_DISPLAY_ALL => t('All messages'),
         ERROR_REPORTING_DISPLAY_VERBOSE => t('All messages, with backtrace information'),
-      ),
+      ],
       '#description' => t('It is recommended that sites running on production environments do not display any errors.'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/system/src/Form/ModulesListConfirmForm.php b/core/modules/system/src/Form/ModulesListConfirmForm.php
index 88452e06bf82aab1c1e91b07fd39945000ec9eb5..50026606d2921022a0f5732de0f6a43232e7469e 100644
--- a/core/modules/system/src/Form/ModulesListConfirmForm.php
+++ b/core/modules/system/src/Form/ModulesListConfirmForm.php
@@ -36,7 +36,7 @@ class ModulesListConfirmForm extends ConfirmFormBase {
    *
    * @var array
    */
-  protected $modules = array();
+  protected $modules = [];
 
   /**
    * The module installer.
@@ -120,10 +120,10 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     $items = $this->buildMessageList();
-    $form['message'] = array(
+    $form['message'] = [
       '#theme' => 'item_list',
       '#items' => $items,
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
@@ -177,10 +177,10 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
             count($config_objects),
             'Unable to install @extension, %config_names already exists in active configuration.',
             'Unable to install @extension, %config_names already exist in active configuration.',
-            array(
+            [
               '%config_names' => implode(', ', $config_objects),
               '@extension' => $this->modules['install'][$e->getExtension()]
-            )),
+            ]),
           'error'
         );
         return;
@@ -194,10 +194,10 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       }
 
       $module_names = array_values($this->modules['install']);
-      drupal_set_message($this->formatPlural(count($module_names), 'Module %name has been enabled.', '@count modules have been enabled: %names.', array(
+      drupal_set_message($this->formatPlural(count($module_names), 'Module %name has been enabled.', '@count modules have been enabled: %names.', [
         '%name' => $module_names[0],
         '%names' => implode(', ', $module_names),
-      )));
+      ]));
     }
 
     $form_state->setRedirectUrl($this->getCancelUrl());
diff --git a/core/modules/system/src/Form/ModulesListForm.php b/core/modules/system/src/Form/ModulesListForm.php
index d98b8a1251f878aba1106f605833e38e303f7b68..28ff7ef4cc2101785a4f6294fe8ade5139f1fca5 100644
--- a/core/modules/system/src/Form/ModulesListForm.php
+++ b/core/modules/system/src/Form/ModulesListForm.php
@@ -119,26 +119,26 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Include system.admin.inc so we can use the sort callbacks.
     $this->moduleHandler->loadInclude('system', 'inc', 'system.admin');
 
-    $form['filters'] = array(
+    $form['filters'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('table-filter', 'js-show'),
-      ),
-    );
+      '#attributes' => [
+        'class' => ['table-filter', 'js-show'],
+      ],
+    ];
 
-    $form['filters']['text'] = array(
+    $form['filters']['text'] = [
       '#type' => 'search',
       '#title' => $this->t('Filter modules'),
       '#title_display' => 'invisible',
       '#size' => 30,
       '#placeholder' => $this->t('Filter by name or description'),
       '#description' => $this->t('Enter a part of the module name or description'),
-      '#attributes' => array(
-        'class' => array('table-filter-text'),
+      '#attributes' => [
+        'class' => ['table-filter-text'],
         'data-table' => '#system-modules',
         'autocomplete' => 'off',
-      ),
-    );
+      ],
+    ];
 
     // Sort all modules by their names.
     $modules = system_rebuild_module_data();
@@ -156,15 +156,15 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     // Add a wrapper around every package.
     foreach (Element::children($form['modules']) as $package) {
-      $form['modules'][$package] += array(
+      $form['modules'][$package] += [
         '#type' => 'details',
         '#title' => $this->t($package),
         '#open' => TRUE,
         '#theme' => 'system_modules_details',
-        '#attributes' => array('class' => array('package-listing')),
+        '#attributes' => ['class' => ['package-listing']],
         // Ensure that the "Core" package comes first.
         '#weight' => $package == 'Core' ? -10 : NULL,
-      );
+      ];
     }
 
     // If testing modules are shown, collapse the corresponding package by
@@ -174,15 +174,15 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     // Lastly, sort all packages by title.
-    uasort($form['modules'], array('\Drupal\Component\Utility\SortArray', 'sortByTitleProperty'));
+    uasort($form['modules'], ['\Drupal\Component\Utility\SortArray', 'sortByTitleProperty']);
 
     $form['#attached']['library'][] = 'system/drupal.system.modules';
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Install'),
       '#button_type' => 'primary',
-    );
+    ];
 
     return $form;
   }
@@ -201,9 +201,9 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    */
   protected function buildRow(array $modules, Extension $module, $distribution) {
     // Set the basic properties.
-    $row['#required'] = array();
-    $row['#requires'] = array();
-    $row['#required_by'] = array();
+    $row['#required'] = [];
+    $row['#requires'] = [];
+    $row['#required_by'] = [];
 
     $row['name']['#markup'] = $module->info['name'];
     $row['description']['#markup'] = $this->t($module->info['description']);
@@ -213,48 +213,48 @@ protected function buildRow(array $modules, Extension $module, $distribution) {
     // implementation exists then the module provides an overview page, rather
     // than checking to see if the page exists, which is costly.
     if ($this->moduleHandler->moduleExists('help') && $module->status && in_array($module->getName(), $this->moduleHandler->getImplementations('help'))) {
-      $row['links']['help'] = array(
+      $row['links']['help'] = [
         '#type' => 'link',
         '#title' => $this->t('Help'),
         '#url' => Url::fromRoute('help.page', ['name' => $module->getName()]),
-        '#options' => array('attributes' => array('class' => array('module-link', 'module-link-help'), 'title' => $this->t('Help'))),
-      );
+        '#options' => ['attributes' => ['class' => ['module-link', 'module-link-help'], 'title' => $this->t('Help')]],
+      ];
     }
 
     // Generate link for module's permission, if the user has access to it.
     if ($module->status && $this->currentUser->hasPermission('administer permissions') && $this->permissionHandler->moduleProvidesPermissions($module->getName())) {
-      $row['links']['permissions'] = array(
+      $row['links']['permissions'] = [
         '#type' => 'link',
         '#title' => $this->t('Permissions'),
         '#url' => Url::fromRoute('user.admin_permissions'),
-        '#options' => array('fragment' => 'module-' . $module->getName(), 'attributes' => array('class' => array('module-link', 'module-link-permissions'), 'title' => $this->t('Configure permissions'))),
-      );
+        '#options' => ['fragment' => 'module-' . $module->getName(), 'attributes' => ['class' => ['module-link', 'module-link-permissions'], 'title' => $this->t('Configure permissions')]],
+      ];
     }
 
     // Generate link for module's configuration page, if it has one.
     if ($module->status && isset($module->info['configure'])) {
-      $route_parameters = isset($module->info['configure_parameters']) ? $module->info['configure_parameters'] : array();
+      $route_parameters = isset($module->info['configure_parameters']) ? $module->info['configure_parameters'] : [];
       if ($this->accessManager->checkNamedRoute($module->info['configure'], $route_parameters, $this->currentUser)) {
-        $row['links']['configure'] = array(
+        $row['links']['configure'] = [
           '#type' => 'link',
           '#title' => $this->t('Configure <span class="visually-hidden">the @module module</span>', ['@module' => $module->info['name']]),
           '#url' => Url::fromRoute($module->info['configure'], $route_parameters),
-          '#options' => array(
-            'attributes' => array(
-              'class' => array('module-link', 'module-link-configure'),
-            ),
-          ),
-        );
+          '#options' => [
+            'attributes' => [
+              'class' => ['module-link', 'module-link-configure'],
+            ],
+          ],
+        ];
       }
     }
 
     // Present a checkbox for installing and indicating the status of a module.
-    $row['enable'] = array(
+    $row['enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Install'),
       '#default_value' => (bool) $module->status,
       '#disabled' => (bool) $module->status,
-    );
+    ];
 
     // Disable the checkbox for required modules.
     if (!empty($module->info['required'])) {
@@ -268,24 +268,24 @@ protected function buildRow(array $modules, Extension $module, $distribution) {
 
     // Initialize an empty array of reasons why the module is incompatible. Add
     // each reason as a separate element of the array.
-    $reasons = array();
+    $reasons = [];
 
     // Check the core compatibility.
     if ($module->info['core'] != \Drupal::CORE_COMPATIBILITY) {
       $compatible = FALSE;
-      $reasons[] = $this->t('This version is not compatible with Drupal @core_version and should be replaced.', array(
+      $reasons[] = $this->t('This version is not compatible with Drupal @core_version and should be replaced.', [
         '@core_version' => \Drupal::CORE_COMPATIBILITY,
-      ));
+      ]);
     }
 
     // Ensure this module is compatible with the currently installed version of PHP.
     if (version_compare(phpversion(), $module->info['php']) < 0) {
       $compatible = FALSE;
       $required = $module->info['php'] . (substr_count($module->info['php'], '.') < 2 ? '.*' : '');
-      $reasons[] = $this->t('This module requires PHP version @php_required and is incompatible with PHP version @php_version.', array(
+      $reasons[] = $this->t('This module requires PHP version @php_required and is incompatible with PHP version @php_version.', [
         '@php_required' => $required,
         '@php_version' => phpversion(),
-      ));
+      ]);
     }
 
     // If this module is not compatible, disable the checkbox.
@@ -299,7 +299,7 @@ protected function buildRow(array $modules, Extension $module, $distribution) {
     // If this module requires other modules, add them to the array.
     foreach ($module->requires as $dependency => $version) {
       if (!isset($modules[$dependency])) {
-        $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">missing</span>)', array('@module' => Unicode::ucfirst($dependency)));
+        $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">missing</span>)', ['@module' => Unicode::ucfirst($dependency)]);
         $row['enable']['#disabled'] = TRUE;
       }
       // Only display visible modules.
@@ -308,25 +308,25 @@ protected function buildRow(array $modules, Extension $module, $distribution) {
         // Disable the module's checkbox if it is incompatible with the
         // dependency's version.
         if ($incompatible_version = drupal_check_incompatibility($version, str_replace(\Drupal::CORE_COMPATIBILITY . '-', '', $modules[$dependency]->info['version']))) {
-          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> version @version)', array(
+          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> version @version)', [
             '@module' => $name . $incompatible_version,
             '@version' => $modules[$dependency]->info['version'],
-          ));
+          ]);
           $row['enable']['#disabled'] = TRUE;
         }
         // Disable the checkbox if the dependency is incompatible with this
         // version of Drupal core.
         elseif ($modules[$dependency]->info['core'] != \Drupal::CORE_COMPATIBILITY) {
-          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> this version of Drupal core)', array(
+          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> this version of Drupal core)', [
             '@module' => $name,
-          ));
+          ]);
           $row['enable']['#disabled'] = TRUE;
         }
         elseif ($modules[$dependency]->status) {
-          $row['#requires'][$dependency] = $this->t('@module', array('@module' => $name));
+          $row['#requires'][$dependency] = $this->t('@module', ['@module' => $name]);
         }
         else {
-          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $name));
+          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-disabled">disabled</span>)', ['@module' => $name]);
         }
       }
     }
@@ -336,11 +336,11 @@ protected function buildRow(array $modules, Extension $module, $distribution) {
     foreach ($module->required_by as $dependent => $version) {
       if (isset($modules[$dependent]) && empty($modules[$dependent]->info['hidden'])) {
         if ($modules[$dependent]->status == 1 && $module->status == 1) {
-          $row['#required_by'][$dependent] = $this->t('@module', array('@module' => $modules[$dependent]->info['name']));
+          $row['#required_by'][$dependent] = $this->t('@module', ['@module' => $modules[$dependent]->info['name']]);
           $row['enable']['#disabled'] = TRUE;
         }
         else {
-          $row['#required_by'][$dependent] = $this->t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $modules[$dependent]->info['name']));
+          $row['#required_by'][$dependent] = $this->t('@module (<span class="admin-disabled">disabled</span>)', ['@module' => $modules[$dependent]->info['name']]);
         }
       }
     }
@@ -359,11 +359,11 @@ protected function buildRow(array $modules, Extension $module, $distribution) {
    */
   protected function buildModuleList(FormStateInterface $form_state) {
     // Build a list of modules to install.
-    $modules = array(
-      'install' => array(),
-      'dependencies' => array(),
+    $modules = [
+      'install' => [],
+      'dependencies' => [],
       'experimental' => [],
-    );
+    ];
 
     $data = system_rebuild_module_data();
     foreach ($data as $name => $module) {
@@ -447,10 +447,10 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       try {
         $this->moduleInstaller->install(array_keys($modules['install']));
         $module_names = array_values($modules['install']);
-        drupal_set_message($this->formatPlural(count($module_names), 'Module %name has been enabled.', '@count modules have been enabled: %names.', array(
+        drupal_set_message($this->formatPlural(count($module_names), 'Module %name has been enabled.', '@count modules have been enabled: %names.', [
           '%name' => $module_names[0],
           '%names' => implode(', ', $module_names),
-        )));
+        ]));
       }
       catch (PreExistingConfigException $e) {
         $config_objects = $e->flattenConfigObjects($e->getConfigObjects());
@@ -459,10 +459,10 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
             count($config_objects),
             'Unable to install @extension, %config_names already exists in active configuration.',
             'Unable to install @extension, %config_names already exist in active configuration.',
-            array(
+            [
               '%config_names' => implode(', ', $config_objects),
               '@extension' => $modules['install'][$e->getExtension()]
-            )),
+            ]),
           'error'
         );
         return;
diff --git a/core/modules/system/src/Form/ModulesUninstallConfirmForm.php b/core/modules/system/src/Form/ModulesUninstallConfirmForm.php
index f4a48230747fba2a7832632dd3a429d979cd3206..c72f240acc791906fc4d00aec4f73d2d77f84137 100644
--- a/core/modules/system/src/Form/ModulesUninstallConfirmForm.php
+++ b/core/modules/system/src/Form/ModulesUninstallConfirmForm.php
@@ -51,7 +51,7 @@ class ModulesUninstallConfirmForm extends ConfirmFormBase {
    *
    * @var array
    */
-  protected $modules = array();
+  protected $modules = [];
 
   /**
    * Constructs a ModulesUninstallConfirmForm object.
@@ -135,12 +135,12 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     $data = system_rebuild_module_data();
     $form['text']['#markup'] = '<p>' . $this->t('The following modules will be completely uninstalled from your site, and <em>all data from these modules will be lost</em>!') . '</p>';
-    $form['modules'] = array(
+    $form['modules'] = [
       '#theme' => 'item_list',
       '#items' => array_map(function ($module) use ($data) {
         return $data[$module]->info['name'];
       }, $this->modules),
-    );
+    ];
 
     // List the dependent entities.
     $this->addDependencyListsToForm($form, 'module', $this->modules, $this->configManager, $this->entityManager);
diff --git a/core/modules/system/src/Form/ModulesUninstallForm.php b/core/modules/system/src/Form/ModulesUninstallForm.php
index 92a15a78a5810baca4ec6ce8921df69977c307ad..80348c59f13a798bbe08680260050b604deb5faa 100644
--- a/core/modules/system/src/Form/ModulesUninstallForm.php
+++ b/core/modules/system/src/Form/ModulesUninstallForm.php
@@ -85,28 +85,28 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Include system.admin.inc so we can use the sort callbacks.
     $this->moduleHandler->loadInclude('system', 'inc', 'system.admin');
 
-    $form['filters'] = array(
+    $form['filters'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('table-filter', 'js-show'),
-      ),
-    );
+      '#attributes' => [
+        'class' => ['table-filter', 'js-show'],
+      ],
+    ];
 
-    $form['filters']['text'] = array(
+    $form['filters']['text'] = [
       '#type' => 'search',
       '#title' => $this->t('Filter modules'),
       '#title_display' => 'invisible',
       '#size' => 30,
       '#placeholder' => $this->t('Filter by name or description'),
       '#description' => $this->t('Enter a part of the module name or description'),
-      '#attributes' => array(
-        'class' => array('table-filter-text'),
+      '#attributes' => [
+        'class' => ['table-filter-text'],
         'data-table' => '#system-modules-uninstall',
         'autocomplete' => 'off',
-      ),
-    );
+      ],
+    ];
 
-    $form['modules'] = array();
+    $form['modules'] = [];
 
     // Only build the rest of the form if there are any modules available to
     // uninstall;
@@ -120,18 +120,18 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     uasort($uninstallable, 'system_sort_modules_by_info_name');
     $validation_reasons = $this->moduleInstaller->validateUninstall(array_keys($uninstallable));
 
-    $form['uninstall'] = array('#tree' => TRUE);
+    $form['uninstall'] = ['#tree' => TRUE];
     foreach ($uninstallable as $module_key => $module) {
       $name = $module->info['name'] ?: $module->getName();
       $form['modules'][$module->getName()]['#module_name'] = $name;
       $form['modules'][$module->getName()]['name']['#markup'] = $name;
       $form['modules'][$module->getName()]['description']['#markup'] = $this->t($module->info['description']);
 
-      $form['uninstall'][$module->getName()] = array(
+      $form['uninstall'][$module->getName()] = [
         '#type' => 'checkbox',
-        '#title' => $this->t('Uninstall @module module', array('@module' => $name)),
+        '#title' => $this->t('Uninstall @module module', ['@module' => $name]),
         '#title_display' => 'invisible',
-      );
+      ];
 
       // If a validator returns reasons not to uninstall a module,
       // list the reasons and disable the check box.
@@ -152,11 +152,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     $form['#attached']['library'][] = 'system/drupal.system.modules';
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Uninstall'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/src/Form/PerformanceForm.php b/core/modules/system/src/Form/PerformanceForm.php
index d9e0917991a077ac7a28fd7eb6a7c1e960bdfc04..a2e85927d52084a051ac131e0b16f10e0389e3ed 100644
--- a/core/modules/system/src/Form/PerformanceForm.php
+++ b/core/modules/system/src/Form/PerformanceForm.php
@@ -100,64 +100,64 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     $config = $this->config('system.performance');
 
-    $form['clear_cache'] = array(
+    $form['clear_cache'] = [
       '#type' => 'details',
       '#title' => t('Clear cache'),
       '#open' => TRUE,
-    );
+    ];
 
-    $form['clear_cache']['clear'] = array(
+    $form['clear_cache']['clear'] = [
       '#type' => 'submit',
       '#value' => t('Clear all caches'),
-      '#submit' => array('::submitCacheClear'),
-    );
+      '#submit' => ['::submitCacheClear'],
+    ];
 
-    $form['caching'] = array(
+    $form['caching'] = [
       '#type' => 'details',
       '#title' => t('Caching'),
       '#open' => TRUE,
       '#description' => $this->t('Note: Drupal provides an internal page cache module that is recommended for small to medium-sized websites.'),
-    );
+    ];
     // Identical options to the ones for block caching.
     // @see \Drupal\Core\Block\BlockBase::buildConfigurationForm()
-    $period = array(0, 60, 180, 300, 600, 900, 1800, 2700, 3600, 10800, 21600, 32400, 43200, 86400);
-    $period = array_map(array($this->dateFormatter, 'formatInterval'), array_combine($period, $period));
+    $period = [0, 60, 180, 300, 600, 900, 1800, 2700, 3600, 10800, 21600, 32400, 43200, 86400];
+    $period = array_map([$this->dateFormatter, 'formatInterval'], array_combine($period, $period));
     $period[0] = '<' . t('no caching') . '>';
-    $form['caching']['page_cache_maximum_age'] = array(
+    $form['caching']['page_cache_maximum_age'] = [
       '#type' => 'select',
       '#title' => t('Page cache maximum age'),
       '#default_value' => $config->get('cache.page.max_age'),
       '#options' => $period,
       '#description' => t('The maximum time a page can be cached by browsers and proxies. This is used as the value for max-age in Cache-Control headers.'),
-    );
+    ];
 
     $directory = 'public://';
     $is_writable = is_dir($directory) && is_writable($directory);
     $disabled = !$is_writable;
     $disabled_message = '';
     if (!$is_writable) {
-      $disabled_message = ' ' . t('<strong class="error">Set up the <a href=":file-system">public files directory</a> to make these optimizations available.</strong>', array(':file-system' => $this->url('system.file_system_settings')));
+      $disabled_message = ' ' . t('<strong class="error">Set up the <a href=":file-system">public files directory</a> to make these optimizations available.</strong>', [':file-system' => $this->url('system.file_system_settings')]);
     }
 
-    $form['bandwidth_optimization'] = array(
+    $form['bandwidth_optimization'] = [
       '#type' => 'details',
       '#title' => t('Bandwidth optimization'),
       '#open' => TRUE,
       '#description' => t('External resources can be optimized automatically, which can reduce both the size and number of requests made to your website.') . $disabled_message,
-    );
+    ];
 
-    $form['bandwidth_optimization']['preprocess_css'] = array(
+    $form['bandwidth_optimization']['preprocess_css'] = [
       '#type' => 'checkbox',
       '#title' => t('Aggregate CSS files'),
       '#default_value' => $config->get('css.preprocess'),
       '#disabled' => $disabled,
-    );
-    $form['bandwidth_optimization']['preprocess_js'] = array(
+    ];
+    $form['bandwidth_optimization']['preprocess_js'] = [
       '#type' => 'checkbox',
       '#title' => t('Aggregate JavaScript files'),
       '#default_value' => $config->get('js.preprocess'),
       '#disabled' => $disabled,
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/system/src/Form/RegionalForm.php b/core/modules/system/src/Form/RegionalForm.php
index 9472a4cb72636671dff853afabe8f531d376fb84..c365fc0551cb19c86129e7e033bf88a9c25415c1 100644
--- a/core/modules/system/src/Form/RegionalForm.php
+++ b/core/modules/system/src/Form/RegionalForm.php
@@ -67,76 +67,76 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Date settings:
     $zones = system_time_zones();
 
-    $form['locale'] = array(
+    $form['locale'] = [
       '#type' => 'details',
       '#title' => t('Locale'),
       '#open' => TRUE,
-    );
+    ];
 
-    $form['locale']['site_default_country'] = array(
+    $form['locale']['site_default_country'] = [
       '#type' => 'select',
       '#title' => t('Default country'),
       '#empty_value' => '',
       '#default_value' => $system_date->get('country.default'),
       '#options' => $countries,
-      '#attributes' => array('class' => array('country-detect')),
-    );
+      '#attributes' => ['class' => ['country-detect']],
+    ];
 
-    $form['locale']['date_first_day'] = array(
+    $form['locale']['date_first_day'] = [
       '#type' => 'select',
       '#title' => t('First day of week'),
       '#default_value' => $system_date->get('first_day'),
-      '#options' => array(0 => t('Sunday'), 1 => t('Monday'), 2 => t('Tuesday'), 3 => t('Wednesday'), 4 => t('Thursday'), 5 => t('Friday'), 6 => t('Saturday')),
-    );
+      '#options' => [0 => t('Sunday'), 1 => t('Monday'), 2 => t('Tuesday'), 3 => t('Wednesday'), 4 => t('Thursday'), 5 => t('Friday'), 6 => t('Saturday')],
+    ];
 
-    $form['timezone'] = array(
+    $form['timezone'] = [
       '#type' => 'details',
       '#title' => t('Time zones'),
       '#open' => TRUE,
-    );
+    ];
 
-    $form['timezone']['date_default_timezone'] = array(
+    $form['timezone']['date_default_timezone'] = [
       '#type' => 'select',
       '#title' => t('Default time zone'),
       '#default_value' => $system_date->get('timezone.default') ?: date_default_timezone_get(),
       '#options' => $zones,
-    );
+    ];
 
     $configurable_timezones = $system_date->get('timezone.user.configurable');
-    $form['timezone']['configurable_timezones'] = array(
+    $form['timezone']['configurable_timezones'] = [
       '#type' => 'checkbox',
       '#title' => t('Users may set their own time zone'),
       '#default_value' => $configurable_timezones,
-    );
+    ];
 
-    $form['timezone']['configurable_timezones_wrapper'] = array(
+    $form['timezone']['configurable_timezones_wrapper'] = [
       '#type' => 'container',
-      '#states' => array(
+      '#states' => [
         // Hide the user configured timezone settings when users are forced to use
         // the default setting.
-        'invisible' => array(
-          'input[name="configurable_timezones"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
-    $form['timezone']['configurable_timezones_wrapper']['empty_timezone_message'] = array(
+        'invisible' => [
+          'input[name="configurable_timezones"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
+    $form['timezone']['configurable_timezones_wrapper']['empty_timezone_message'] = [
       '#type' => 'checkbox',
       '#title' => t('Remind users at login if their time zone is not set'),
       '#default_value' => $system_date->get('timezone.user.warn'),
       '#description' => t('Only applied if users may set their own time zone.')
-    );
+    ];
 
-    $form['timezone']['configurable_timezones_wrapper']['user_default_timezone'] = array(
+    $form['timezone']['configurable_timezones_wrapper']['user_default_timezone'] = [
       '#type' => 'radios',
       '#title' => t('Time zone for new users'),
       '#default_value' => $system_date->get('timezone.user.default'),
-      '#options' => array(
+      '#options' => [
         DRUPAL_USER_TIMEZONE_DEFAULT => t('Default time zone'),
         DRUPAL_USER_TIMEZONE_EMPTY   => t('Empty time zone'),
         DRUPAL_USER_TIMEZONE_SELECT  => t('Users may set their own time zone at registration'),
-      ),
+      ],
       '#description' => t('Only applied if users may set their own time zone.')
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/system/src/Form/RssFeedsForm.php b/core/modules/system/src/Form/RssFeedsForm.php
index 79aa69ba4bacb45c7d5564d79d2d28bd0cc955ca..986ff114971202911d9bb3ba953d0ab00bf24d47 100644
--- a/core/modules/system/src/Form/RssFeedsForm.php
+++ b/core/modules/system/src/Form/RssFeedsForm.php
@@ -29,31 +29,31 @@ protected function getEditableConfigNames() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $rss_config = $this->config('system.rss');
-    $form['feed_description'] = array(
+    $form['feed_description'] = [
       '#type' => 'textarea',
       '#title' => t('Feed description'),
       '#default_value' => $rss_config->get('channel.description'),
       '#description' => t('Description of your site, included in each feed.')
-    );
-    $options = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30);
-    $form['feed_default_items'] = array(
+    ];
+    $options = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30];
+    $form['feed_default_items'] = [
       '#type' => 'select',
       '#title' => t('Number of items in each feed'),
       '#default_value' => $rss_config->get('items.limit'),
       '#options' => array_combine($options, $options),
       '#description' => t('Default number of items to include in each feed.')
-    );
-    $form['feed_view_mode'] = array(
+    ];
+    $form['feed_view_mode'] = [
       '#type' => 'select',
       '#title' => t('Feed content'),
       '#default_value' => $rss_config->get('items.view_mode'),
-      '#options' => array(
+      '#options' => [
         'title' => t('Titles only'),
         'teaser' => t('Titles plus teaser'),
         'fulltext' => t('Full text'),
-      ),
+      ],
       '#description' => t('Global setting for the default display of content items in each feed.')
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/system/src/Form/SiteInformationForm.php b/core/modules/system/src/Form/SiteInformationForm.php
index 92986d6d69edefbf343af14d81949219fc49f890..7173ebe9427147f567ac432988fc1fe4c2e09159 100644
--- a/core/modules/system/src/Form/SiteInformationForm.php
+++ b/core/modules/system/src/Form/SiteInformationForm.php
@@ -92,63 +92,63 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       $site_mail = ini_get('sendmail_from');
     }
 
-    $form['site_information'] = array(
+    $form['site_information'] = [
       '#type' => 'details',
       '#title' => t('Site details'),
       '#open' => TRUE,
-    );
-    $form['site_information']['site_name'] = array(
+    ];
+    $form['site_information']['site_name'] = [
       '#type' => 'textfield',
       '#title' => t('Site name'),
       '#default_value' => $site_config->get('name'),
       '#required' => TRUE,
-    );
-    $form['site_information']['site_slogan'] = array(
+    ];
+    $form['site_information']['site_slogan'] = [
       '#type' => 'textfield',
       '#title' => t('Slogan'),
       '#default_value' => $site_config->get('slogan'),
       '#description' => t("How this is used depends on your site's theme."),
-    );
-    $form['site_information']['site_mail'] = array(
+    ];
+    $form['site_information']['site_mail'] = [
       '#type' => 'email',
       '#title' => t('Email address'),
       '#default_value' => $site_mail,
       '#description' => t("The <em>From</em> address in automated emails sent during registration and new password requests, and other notifications. (Use an address ending in your site's domain to help prevent this email being flagged as spam.)"),
       '#required' => TRUE,
-    );
-    $form['front_page'] = array(
+    ];
+    $form['front_page'] = [
       '#type' => 'details',
       '#title' => t('Front page'),
       '#open' => TRUE,
-    );
+    ];
     $front_page = $site_config->get('page.front') != '/user/login' ? $this->aliasManager->getAliasByPath($site_config->get('page.front')) : '';
-    $form['front_page']['site_frontpage'] = array(
+    $form['front_page']['site_frontpage'] = [
       '#type' => 'textfield',
       '#title' => t('Default front page'),
       '#default_value' => $front_page,
       '#size' => 40,
       '#description' => t('Optionally, specify a relative URL to display as the front page. Leave blank to display the default front page.'),
       '#field_prefix' => $this->requestContext->getCompleteBaseUrl(),
-    );
-    $form['error_page'] = array(
+    ];
+    $form['error_page'] = [
       '#type' => 'details',
       '#title' => t('Error pages'),
       '#open' => TRUE,
-    );
-    $form['error_page']['site_403'] = array(
+    ];
+    $form['error_page']['site_403'] = [
       '#type' => 'textfield',
       '#title' => t('Default 403 (access denied) page'),
       '#default_value' => $site_config->get('page.403'),
       '#size' => 40,
       '#description' => t('This page is displayed when the requested document is denied to the current user. Leave blank to display a generic "access denied" page.'),
-    );
-    $form['error_page']['site_404'] = array(
+    ];
+    $form['error_page']['site_404'] = [
       '#type' => 'textfield',
       '#title' => t('Default 404 (not found) page'),
       '#default_value' => $site_config->get('page.404'),
       '#size' => 40,
       '#description' => t('This page is displayed when no other content matches the requested document. Leave blank to display a generic "page not found" page.'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
@@ -172,7 +172,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
 
     }
     if (!$this->pathValidator->isValid($form_state->getValue('site_frontpage'))) {
-      $form_state->setErrorByName('site_frontpage', $this->t("The path '%path' is either invalid or you do not have access to it.", array('%path' => $form_state->getValue('site_frontpage'))));
+      $form_state->setErrorByName('site_frontpage', $this->t("The path '%path' is either invalid or you do not have access to it.", ['%path' => $form_state->getValue('site_frontpage')]));
     }
     // Get the normal paths of both error pages.
     if (!$form_state->isValueEmpty('site_403')) {
@@ -189,11 +189,11 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
     }
     // Validate 403 error path.
     if (!$form_state->isValueEmpty('site_403') && !$this->pathValidator->isValid($form_state->getValue('site_403'))) {
-      $form_state->setErrorByName('site_403', $this->t("The path '%path' is either invalid or you do not have access to it.", array('%path' => $form_state->getValue('site_403'))));
+      $form_state->setErrorByName('site_403', $this->t("The path '%path' is either invalid or you do not have access to it.", ['%path' => $form_state->getValue('site_403')]));
     }
     // Validate 404 error path.
     if (!$form_state->isValueEmpty('site_404') && !$this->pathValidator->isValid($form_state->getValue('site_404'))) {
-      $form_state->setErrorByName('site_404', $this->t("The path '%path' is either invalid or you do not have access to it.", array('%path' => $form_state->getValue('site_404'))));
+      $form_state->setErrorByName('site_404', $this->t("The path '%path' is either invalid or you do not have access to it.", ['%path' => $form_state->getValue('site_404')]));
     }
 
     parent::validateForm($form, $form_state);
diff --git a/core/modules/system/src/Form/SiteMaintenanceModeForm.php b/core/modules/system/src/Form/SiteMaintenanceModeForm.php
index 0d0b2afe0ce58c68b8dda229adfee1d29313c849..fb509aafe6d98ff1b087a7b7b913513ff0f1465e 100644
--- a/core/modules/system/src/Form/SiteMaintenanceModeForm.php
+++ b/core/modules/system/src/Form/SiteMaintenanceModeForm.php
@@ -75,17 +75,17 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('system.maintenance');
     $permissions = $this->permissionHandler->getPermissions();
     $permission_label = $permissions['access site in maintenance mode']['title'];
-    $form['maintenance_mode'] = array(
+    $form['maintenance_mode'] = [
       '#type' => 'checkbox',
       '#title' => t('Put site into maintenance mode'),
       '#default_value' => $this->state->get('system.maintenance_mode'),
-      '#description' => t('Visitors will only see the maintenance mode message. Only users with the "@permission-label" <a href=":permissions-url">permission</a> will be able to access the site. Authorized users can log in directly via the <a href=":user-login">user login</a> page.', array('@permission-label' => $permission_label, ':permissions-url' => $this->url('user.admin_permissions'), ':user-login' => $this->url('user.login'))),
-    );
-    $form['maintenance_mode_message'] = array(
+      '#description' => t('Visitors will only see the maintenance mode message. Only users with the "@permission-label" <a href=":permissions-url">permission</a> will be able to access the site. Authorized users can log in directly via the <a href=":user-login">user login</a> page.', ['@permission-label' => $permission_label, ':permissions-url' => $this->url('user.admin_permissions'), ':user-login' => $this->url('user.login')]),
+    ];
+    $form['maintenance_mode_message'] = [
       '#type' => 'textarea',
       '#title' => t('Message to display when in maintenance mode'),
       '#default_value' => $config->get('message'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/system/src/Form/ThemeAdminForm.php b/core/modules/system/src/Form/ThemeAdminForm.php
index a3ec4191c711592be8dc3344f7c204e2e1fcaa9a..e8d17edd257d3c1e24f523139cbddeef9617ad75 100644
--- a/core/modules/system/src/Form/ThemeAdminForm.php
+++ b/core/modules/system/src/Form/ThemeAdminForm.php
@@ -29,24 +29,24 @@ protected function getEditableConfigNames() {
    */
   public function buildForm(array $form, FormStateInterface $form_state, array $theme_options = NULL) {
     // Administration theme settings.
-    $form['admin_theme'] = array(
+    $form['admin_theme'] = [
       '#type' => 'details',
       '#title' => $this->t('Administration theme'),
       '#open' => TRUE,
-    );
-    $form['admin_theme']['admin_theme'] = array(
+    ];
+    $form['admin_theme']['admin_theme'] = [
       '#type' => 'select',
-      '#options' => array(0 => $this->t('Default theme')) + $theme_options,
+      '#options' => [0 => $this->t('Default theme')] + $theme_options,
       '#title' => $this->t('Administration theme'),
       '#description' => $this->t('Choose "Default theme" to always use the same theme as the rest of the site.'),
       '#default_value' => $this->config('system.theme')->get('admin'),
-    );
-    $form['admin_theme']['actions'] = array('#type' => 'actions');
-    $form['admin_theme']['actions']['submit'] = array(
+    ];
+    $form['admin_theme']['actions'] = ['#type' => 'actions'];
+    $form['admin_theme']['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save configuration'),
       '#button_type' => 'primary',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/src/Form/ThemeSettingsForm.php b/core/modules/system/src/Form/ThemeSettingsForm.php
index 37b5ea1364e6d840cc0952eac18f49cc1bc6e6d8..f5cfb090826095502702deace675154248c0642b 100644
--- a/core/modules/system/src/Form/ThemeSettingsForm.php
+++ b/core/modules/system/src/Form/ThemeSettingsForm.php
@@ -132,25 +132,25 @@ public function buildForm(array $form, FormStateInterface $form_state, $theme =
     //   by https://www.drupal.org/node/2402467.
     $this->editableConfig = [$config_key];
 
-    $form['var'] = array(
+    $form['var'] = [
       '#type' => 'hidden',
       '#value' => $var
-    );
-    $form['config_key'] = array(
+    ];
+    $form['config_key'] = [
       '#type' => 'hidden',
       '#value' => $config_key
-    );
+    ];
 
     // Toggle settings
-    $toggles = array(
+    $toggles = [
       'node_user_picture' => t('User pictures in posts'),
       'comment_user_picture' => t('User pictures in comments'),
       'comment_user_verification' => t('User verification status in comments'),
       'favicon' => t('Shortcut icon'),
-    );
+    ];
 
     // Some features are not always available
-    $disabled = array();
+    $disabled = [];
     if (!user_picture_enabled()) {
       $disabled['toggle_node_user_picture'] = TRUE;
       $disabled['toggle_comment_user_picture'] = TRUE;
@@ -160,14 +160,14 @@ public function buildForm(array $form, FormStateInterface $form_state, $theme =
       $disabled['toggle_comment_user_verification'] = TRUE;
     }
 
-    $form['theme_settings'] = array(
+    $form['theme_settings'] = [
       '#type' => 'details',
       '#title' => t('Page element display'),
       '#open' => TRUE,
-    );
+    ];
     foreach ($toggles as $name => $title) {
       if ((!$theme) || in_array($name, $features)) {
-        $form['theme_settings']['toggle_' . $name] = array('#type' => 'checkbox', '#title' => $title, '#default_value' => theme_get_setting('features.' . $name, $theme));
+        $form['theme_settings']['toggle_' . $name] = ['#type' => 'checkbox', '#title' => $title, '#default_value' => theme_get_setting('features.' . $name, $theme)];
         // Disable checkboxes for features not supported in the current configuration.
         if (isset($disabled['toggle_' . $name])) {
           $form['theme_settings']['toggle_' . $name]['#disabled'] = TRUE;
@@ -183,82 +183,82 @@ public function buildForm(array $form, FormStateInterface $form_state, $theme =
 
     // Logo settings, only available when file.module is enabled.
     if ((!$theme || in_array('logo', $features)) && $this->moduleHandler->moduleExists('file')) {
-      $form['logo'] = array(
+      $form['logo'] = [
         '#type' => 'details',
         '#title' => t('Logo image'),
         '#open' => TRUE,
-      );
-      $form['logo']['default_logo'] = array(
+      ];
+      $form['logo']['default_logo'] = [
         '#type' => 'checkbox',
         '#title' => t('Use the logo supplied by the theme'),
         '#default_value' => theme_get_setting('logo.use_default', $theme),
         '#tree' => FALSE,
-      );
-      $form['logo']['settings'] = array(
+      ];
+      $form['logo']['settings'] = [
         '#type' => 'container',
-        '#states' => array(
+        '#states' => [
           // Hide the logo settings when using the default logo.
-          'invisible' => array(
-            'input[name="default_logo"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['logo']['settings']['logo_path'] = array(
+          'invisible' => [
+            'input[name="default_logo"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['logo']['settings']['logo_path'] = [
         '#type' => 'textfield',
         '#title' => t('Path to custom logo'),
         '#default_value' => theme_get_setting('logo.path', $theme),
-      );
-      $form['logo']['settings']['logo_upload'] = array(
+      ];
+      $form['logo']['settings']['logo_upload'] = [
         '#type' => 'file',
         '#title' => t('Upload logo image'),
         '#maxlength' => 40,
         '#description' => t("If you don't have direct file access to the server, use this field to upload your logo.")
-      );
+      ];
     }
 
     if (((!$theme) || in_array('favicon', $features)) && $this->moduleHandler->moduleExists('file')) {
-      $form['favicon'] = array(
+      $form['favicon'] = [
         '#type' => 'details',
         '#title' => t('Favicon'),
         '#open' => TRUE,
         '#description' => t("Your shortcut icon, or favicon, is displayed in the address bar and bookmarks of most browsers."),
-        '#states' => array(
+        '#states' => [
           // Hide the shortcut icon settings fieldset when shortcut icon display
           // is disabled.
-          'invisible' => array(
-            'input[name="toggle_favicon"]' => array('checked' => FALSE),
-          ),
-        ),
-      );
-      $form['favicon']['default_favicon'] = array(
+          'invisible' => [
+            'input[name="toggle_favicon"]' => ['checked' => FALSE],
+          ],
+        ],
+      ];
+      $form['favicon']['default_favicon'] = [
         '#type' => 'checkbox',
         '#title' => t('Use the favicon supplied by the theme'),
         '#default_value' => theme_get_setting('favicon.use_default', $theme),
-      );
-      $form['favicon']['settings'] = array(
+      ];
+      $form['favicon']['settings'] = [
         '#type' => 'container',
-        '#states' => array(
+        '#states' => [
           // Hide the favicon settings when using the default favicon.
-          'invisible' => array(
-            'input[name="default_favicon"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['favicon']['settings']['favicon_path'] = array(
+          'invisible' => [
+            'input[name="default_favicon"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['favicon']['settings']['favicon_path'] = [
         '#type' => 'textfield',
         '#title' => t('Path to custom icon'),
         '#default_value' => theme_get_setting('favicon.path', $theme),
-      );
-      $form['favicon']['settings']['favicon_upload'] = array(
+      ];
+      $form['favicon']['settings']['favicon_upload'] = [
         '#type' => 'file',
         '#title' => t('Upload favicon image'),
         '#description' => t("If you don't have direct file access to the server, use this field to upload your shortcut icon.")
-      );
+      ];
     }
 
     // Inject human-friendly values and form element descriptions for logo and
     // favicon.
-    foreach (array('logo' => 'logo.svg', 'favicon' => 'favicon.ico') as $type => $default) {
+    foreach (['logo' => 'logo.svg', 'favicon' => 'favicon.ico'] as $type => $default) {
       if (isset($form[$type]['settings'][$type . '_path'])) {
         $element = &$form[$type]['settings'][$type . '_path'];
 
@@ -273,7 +273,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $theme =
 
         // Prepare local file path for description.
         if ($original_path && isset($friendly_path)) {
-          $local_file = strtr($original_path, array('public:/' => PublicStream::basePath()));
+          $local_file = strtr($original_path, ['public:/' => PublicStream::basePath()]);
         }
         elseif ($theme) {
           $local_file = drupal_get_path('theme', $theme) . '/' . $default;
@@ -282,11 +282,11 @@ public function buildForm(array $form, FormStateInterface $form_state, $theme =
           $local_file = $this->themeManager->getActiveTheme()->getPath() . '/' . $default;
         }
 
-        $element['#description'] = t('Examples: <code>@implicit-public-file</code> (for a file in the public filesystem), <code>@explicit-file</code>, or <code>@local-file</code>.', array(
+        $element['#description'] = t('Examples: <code>@implicit-public-file</code> (for a file in the public filesystem), <code>@explicit-file</code>, or <code>@local-file</code>.', [
           '@implicit-public-file' => isset($friendly_path) ? $friendly_path : $default,
           '@explicit-file' => file_uri_scheme($original_path) !== FALSE ? $original_path : 'public://' . $default,
           '@local-file' => $local_file,
-        ));
+        ]);
       }
     }
 
@@ -294,12 +294,12 @@ public function buildForm(array $form, FormStateInterface $form_state, $theme =
       // Call engine-specific settings.
       $function = $themes[$theme]->prefix . '_engine_settings';
       if (function_exists($function)) {
-        $form['engine_specific'] = array(
+        $form['engine_specific'] = [
           '#type' => 'details',
           '#title' => t('Theme-engine-specific settings'),
           '#open' => TRUE,
-          '#description' => t('These settings only exist for the themes based on the %engine theme engine.', array('%engine' => $themes[$theme]->prefix)),
-        );
+          '#description' => t('These settings only exist for the themes based on the %engine theme engine.', ['%engine' => $themes[$theme]->prefix]),
+        ];
         $function($form, $form_state);
       }
 
@@ -309,7 +309,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $theme =
         $theme_keys[] = $theme;
       }
       else {
-        $theme_keys = array($theme);
+        $theme_keys = [$theme];
       }
 
       // Save the name of the current theme (if any), so that we can temporarily
@@ -356,7 +356,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
 
     if ($this->moduleHandler->moduleExists('file')) {
       // Handle file uploads.
-      $validators = array('file_validate_is_image' => array());
+      $validators = ['file_validate_is_image' => []];
 
       // Check for a new uploaded logo.
       $file = file_save_upload('logo_upload', $validators, FALSE, 0);
@@ -372,7 +372,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
         }
       }
 
-      $validators = array('file_validate_extensions' => array('ico png gif jpg jpeg apng svg'));
+      $validators = ['file_validate_extensions' => ['ico png gif jpg jpeg apng svg']];
 
       // Check for a new uploaded favicon.
       $file = file_save_upload('favicon_upload', $validators, FALSE, 0);
diff --git a/core/modules/system/src/PathBasedBreadcrumbBuilder.php b/core/modules/system/src/PathBasedBreadcrumbBuilder.php
index dcfc0732f3fca16023092ca71a01e1eb2f956618..4a96d1195a247c5a8d165124046a13bb367352f9 100644
--- a/core/modules/system/src/PathBasedBreadcrumbBuilder.php
+++ b/core/modules/system/src/PathBasedBreadcrumbBuilder.php
@@ -122,14 +122,14 @@ public function applies(RouteMatchInterface $route_match) {
    */
   public function build(RouteMatchInterface $route_match) {
     $breadcrumb = new Breadcrumb();
-    $links = array();
+    $links = [];
 
     // General path-based breadcrumbs. Use the actual request path, prior to
     // resolving path aliases, so the breadcrumb can be defined by simply
     // creating a hierarchy of path aliases.
     $path = trim($this->context->getPathInfo(), '/');
     $path_elements = explode('/', $path);
-    $exclude = array();
+    $exclude = [];
     // Don't show a link to the front-page path.
     $front = $this->config->get('page.front');
     $exclude[$front] = TRUE;
@@ -154,7 +154,7 @@ public function build(RouteMatchInterface $route_match) {
           if (!isset($title)) {
             // Fallback to using the raw path component as the title if the
             // route is missing a _title or _title_callback attribute.
-            $title = str_replace(array('-', '_'), ' ', Unicode::ucfirst(end($path_elements)));
+            $title = str_replace(['-', '_'], ' ', Unicode::ucfirst(end($path_elements)));
           }
           $url = Url::fromRouteMatch($route_match);
           $links[] = new Link($title, $url);
diff --git a/core/modules/system/src/Plugin/Block/SystemBrandingBlock.php b/core/modules/system/src/Plugin/Block/SystemBrandingBlock.php
index f6b0958c68ca50465f55248ee87e77f61633be82..330528528d67808d8ec94da33f59f201c3e51448 100644
--- a/core/modules/system/src/Plugin/Block/SystemBrandingBlock.php
+++ b/core/modules/system/src/Plugin/Block/SystemBrandingBlock.php
@@ -60,12 +60,12 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'use_site_logo' => TRUE,
       'use_site_name' => TRUE,
       'use_site_slogan' => TRUE,
       'label_display' => FALSE,
-    );
+    ];
   }
 
   /**
@@ -77,15 +77,15 @@ public function blockForm($form, FormStateInterface $form_state) {
 
     // Get permissions.
     $url_system_theme_settings = new Url('system.theme_settings');
-    $url_system_theme_settings_theme = new Url('system.theme_settings_theme', array('theme' => $theme));
+    $url_system_theme_settings_theme = new Url('system.theme_settings_theme', ['theme' => $theme]);
 
     if ($url_system_theme_settings->access() && $url_system_theme_settings_theme->access()) {
       // Provide links to the Appearance Settings and Theme Settings pages
       // if the user has access to administer themes.
-      $site_logo_description = $this->t('Defined on the <a href=":appearance">Appearance Settings</a> or <a href=":theme">Theme Settings</a> page.', array(
+      $site_logo_description = $this->t('Defined on the <a href=":appearance">Appearance Settings</a> or <a href=":theme">Theme Settings</a> page.', [
         ':appearance' => $url_system_theme_settings->toString(),
         ':theme' => $url_system_theme_settings_theme->toString(),
-      ));
+      ]);
     }
     else {
       // Explain that the user does not have access to the Appearance and Theme
@@ -99,8 +99,8 @@ public function blockForm($form, FormStateInterface $form_state) {
 
       // Provide link to Site Information page if the user has access to
       // administer site configuration.
-      $site_name_description = $this->t('Defined on the <a href=":information">Site Information</a> page.', array(':information' => $site_information_url));
-      $site_slogan_description = $this->t('Defined on the <a href=":information">Site Information</a> page.', array(':information' => $site_information_url));
+      $site_name_description = $this->t('Defined on the <a href=":information">Site Information</a> page.', [':information' => $site_information_url]);
+      $site_slogan_description = $this->t('Defined on the <a href=":information">Site Information</a> page.', [':information' => $site_information_url]);
     }
     else {
       // Explain that the user does not have access to the Site Information
@@ -109,30 +109,30 @@ public function blockForm($form, FormStateInterface $form_state) {
       $site_slogan_description = $this->t('Defined on the Site Information page. You do not have the appropriate permissions to change the site logo.');
     }
 
-    $form['block_branding'] = array(
+    $form['block_branding'] = [
       '#type' => 'fieldset',
       '#title' => $this->t('Toggle branding elements'),
       '#description' => $this->t('Choose which branding elements you want to show in this block instance.'),
-    );
-    $form['block_branding']['use_site_logo'] = array(
+    ];
+    $form['block_branding']['use_site_logo'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Site logo'),
       '#description' => $site_logo_description,
       '#default_value' => $this->configuration['use_site_logo'],
-    );
+    ];
 
-    $form['block_branding']['use_site_name'] = array(
+    $form['block_branding']['use_site_name'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Site name'),
       '#description' => $site_name_description,
       '#default_value' => $this->configuration['use_site_name'],
-    );
-    $form['block_branding']['use_site_slogan'] = array(
+    ];
+    $form['block_branding']['use_site_slogan'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Site slogan'),
       '#description' => $site_slogan_description,
       '#default_value' => $this->configuration['use_site_slogan'],
-    );
+    ];
     return $form;
   }
 
@@ -150,25 +150,25 @@ public function blockSubmit($form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function build() {
-    $build = array();
+    $build = [];
     $site_config = $this->configFactory->get('system.site');
 
-    $build['site_logo'] = array(
+    $build['site_logo'] = [
       '#theme' => 'image',
       '#uri' => theme_get_setting('logo.url'),
       '#alt' => $this->t('Home'),
       '#access' => $this->configuration['use_site_logo'],
-    );
+    ];
 
-    $build['site_name'] = array(
+    $build['site_name'] = [
       '#markup' => $site_config->get('name'),
       '#access' => $this->configuration['use_site_name'],
-    );
+    ];
 
-    $build['site_slogan'] = array(
+    $build['site_slogan'] = [
       '#markup' => $site_config->get('slogan'),
       '#access' => $this->configuration['use_site_slogan'],
-    );
+    ];
 
     return $build;
   }
diff --git a/core/modules/system/src/Plugin/Block/SystemMenuBlock.php b/core/modules/system/src/Plugin/Block/SystemMenuBlock.php
index e9e1b33d2aec10c9b17f783991406cb97eb77e13..52daa098e4bbecf74816b6434ecb3bbb8dcb55b0 100644
--- a/core/modules/system/src/Plugin/Block/SystemMenuBlock.php
+++ b/core/modules/system/src/Plugin/Block/SystemMenuBlock.php
@@ -64,36 +64,36 @@ public function blockForm($form, FormStateInterface $form_state) {
     $config = $this->configuration;
 
     $defaults = $this->defaultConfiguration();
-    $form['menu_levels'] = array(
+    $form['menu_levels'] = [
       '#type' => 'details',
       '#title' => $this->t('Menu levels'),
       // Open if not set to defaults.
       '#open' => $defaults['level'] !== $config['level'] || $defaults['depth'] !== $config['depth'],
       '#process' => [[get_class(), 'processMenuLevelParents']],
-    );
+    ];
 
     $options = range(0, $this->menuTree->maxDepth());
     unset($options[0]);
 
-    $form['menu_levels']['level'] = array(
+    $form['menu_levels']['level'] = [
       '#type' => 'select',
       '#title' => $this->t('Initial visibility level'),
       '#default_value' => $config['level'],
       '#options' => $options,
       '#description' => $this->t('The menu is only visible if the menu item for the current page is at this level or below it. Use level 1 to always display this menu.'),
       '#required' => TRUE,
-    );
+    ];
 
     $options[0] = $this->t('Unlimited');
 
-    $form['menu_levels']['depth'] = array(
+    $form['menu_levels']['depth'] = [
       '#type' => 'select',
       '#title' => $this->t('Number of levels to display'),
       '#default_value' => $config['depth'],
       '#options' => $options,
       '#description' => $this->t('This maximum number includes the initial level.'),
       '#required' => TRUE,
-    );
+    ];
 
     return $form;
   }
@@ -136,10 +136,10 @@ public function build() {
     }
 
     $tree = $this->menuTree->load($menu_name, $parameters);
-    $manipulators = array(
-      array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-      array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
-    );
+    $manipulators = [
+      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+      ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+    ];
     $tree = $this->menuTree->transform($tree, $manipulators);
     return $this->menuTree->build($tree);
   }
diff --git a/core/modules/system/src/Plugin/Block/SystemMessagesBlock.php b/core/modules/system/src/Plugin/Block/SystemMessagesBlock.php
index bbfb03695cbdbbefd8c9c7ac66ca7ecbd189a4d1..0b6638f43bef0c6122d7bbc1696041c21113d322 100644
--- a/core/modules/system/src/Plugin/Block/SystemMessagesBlock.php
+++ b/core/modules/system/src/Plugin/Block/SystemMessagesBlock.php
@@ -22,9 +22,9 @@ class SystemMessagesBlock extends BlockBase implements MessagesBlockPluginInterf
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'label_display' => FALSE,
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/system/src/Plugin/Block/SystemPoweredByBlock.php b/core/modules/system/src/Plugin/Block/SystemPoweredByBlock.php
index 132b00030abc68a651a635dcac8a9ab7df66cdab..c1e0ba8b8c172e35346d8554389ccff9f62963af 100644
--- a/core/modules/system/src/Plugin/Block/SystemPoweredByBlock.php
+++ b/core/modules/system/src/Plugin/Block/SystemPoweredByBlock.php
@@ -25,7 +25,7 @@ public function defaultConfiguration() {
    * {@inheritdoc}
    */
   public function build() {
-    return array('#markup' => '<span>' . $this->t('Powered by <a href=":poweredby">Drupal</a>', array(':poweredby' => 'https://www.drupal.org')) . '</span>');
+    return ['#markup' => '<span>' . $this->t('Powered by <a href=":poweredby">Drupal</a>', [':poweredby' => 'https://www.drupal.org']) . '</span>'];
   }
 
 }
diff --git a/core/modules/system/src/Plugin/Condition/CurrentThemeCondition.php b/core/modules/system/src/Plugin/Condition/CurrentThemeCondition.php
index 2f7375dce899baef0ca1a12ed7f16f5cc1775afe..d282963aa6ffc3fc7b5db04500bf60a64ffd6970 100644
--- a/core/modules/system/src/Plugin/Condition/CurrentThemeCondition.php
+++ b/core/modules/system/src/Plugin/Condition/CurrentThemeCondition.php
@@ -70,21 +70,21 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array('theme' => '') + parent::defaultConfiguration();
+    return ['theme' => ''] + parent::defaultConfiguration();
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['theme'] = array(
+    $form['theme'] = [
       '#type' => 'select',
       '#title' => $this->t('Theme'),
       '#default_value' => $this->configuration['theme'],
       '#options' => array_map(function ($theme_info) {
         return $theme_info->info['name'];
       }, $this->themeHandler->listInfo()),
-    );
+    ];
     return parent::buildConfigurationForm($form, $form_state);
   }
 
@@ -112,10 +112,10 @@ public function evaluate() {
    */
   public function summary() {
     if ($this->isNegated()) {
-      return $this->t('The current theme is not @theme', array('@theme' => $this->configuration['theme']));
+      return $this->t('The current theme is not @theme', ['@theme' => $this->configuration['theme']]);
     }
 
-    return $this->t('The current theme is @theme', array('@theme' => $this->configuration['theme']));
+    return $this->t('The current theme is @theme', ['@theme' => $this->configuration['theme']]);
   }
 
   /**
diff --git a/core/modules/system/src/Plugin/Condition/RequestPath.php b/core/modules/system/src/Plugin/Condition/RequestPath.php
index 17373cef7e9497f2ed33142fb0aee4b1c9b32a28..ae9d77da21a79728e4404ac0f73e9013530133a6 100644
--- a/core/modules/system/src/Plugin/Condition/RequestPath.php
+++ b/core/modules/system/src/Plugin/Condition/RequestPath.php
@@ -94,22 +94,22 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array('pages' => '') + parent::defaultConfiguration();
+    return ['pages' => ''] + parent::defaultConfiguration();
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['pages'] = array(
+    $form['pages'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Pages'),
       '#default_value' => $this->configuration['pages'],
-      '#description' => $this->t("Specify pages by using their paths. Enter one path per line. The '*' character is a wildcard. An example path is %user-wildcard for every user page. %front is the front page.", array(
+      '#description' => $this->t("Specify pages by using their paths. Enter one path per line. The '*' character is a wildcard. An example path is %user-wildcard for every user page. %front is the front page.", [
         '%user-wildcard' => '/user/*',
         '%front' => '<front>',
-      )),
-    );
+      ]),
+    ];
     return parent::buildConfigurationForm($form, $form_state);
   }
 
@@ -128,9 +128,9 @@ public function summary() {
     $pages = array_map('trim', explode("\n", $this->configuration['pages']));
     $pages = implode(', ', $pages);
     if (!empty($this->configuration['negate'])) {
-      return $this->t('Do not return true on the following pages: @pages', array('@pages' => $pages));
+      return $this->t('Do not return true on the following pages: @pages', ['@pages' => $pages]);
     }
-    return $this->t('Return true on the following pages: @pages', array('@pages' => $pages));
+    return $this->t('Return true on the following pages: @pages', ['@pages' => $pages]);
   }
 
   /**
diff --git a/core/modules/system/src/Plugin/Derivative/SystemMenuBlock.php b/core/modules/system/src/Plugin/Derivative/SystemMenuBlock.php
index 2f802e65098947055f000ef197ad96f89a4e6e51..5da50271720ff24f4c45705c5e461fb1eb9dd208 100644
--- a/core/modules/system/src/Plugin/Derivative/SystemMenuBlock.php
+++ b/core/modules/system/src/Plugin/Derivative/SystemMenuBlock.php
@@ -47,7 +47,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
     foreach ($this->menuStorage->loadMultiple() as $menu => $entity) {
       $this->derivatives[$menu] = $base_plugin_definition;
       $this->derivatives[$menu]['admin_label'] = $entity->label();
-      $this->derivatives[$menu]['config_dependencies']['config'] = array($entity->getConfigDependencyName());
+      $this->derivatives[$menu]['config_dependencies']['config'] = [$entity->getConfigDependencyName()];
     }
     return $this->derivatives;
   }
diff --git a/core/modules/system/src/Plugin/Derivative/ThemeLocalTask.php b/core/modules/system/src/Plugin/Derivative/ThemeLocalTask.php
index 3ff29dcb3863c6e946392f780a1804fa90241aa4..ab9f87d949618ae6e32d4be61dd4db47078e1c40 100644
--- a/core/modules/system/src/Plugin/Derivative/ThemeLocalTask.php
+++ b/core/modules/system/src/Plugin/Derivative/ThemeLocalTask.php
@@ -46,7 +46,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
       if ($this->themeHandler->hasUi($theme_name)) {
         $this->derivatives[$theme_name] = $base_plugin_definition;
         $this->derivatives[$theme_name]['title'] = $theme->info['name'];
-        $this->derivatives[$theme_name]['route_parameters'] = array('theme' => $theme_name);
+        $this->derivatives[$theme_name]['route_parameters'] = ['theme' => $theme_name];
       }
     }
     return $this->derivatives;
diff --git a/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php b/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
index 7b195cc9b29c0ab35c00667bdf5d1493f9b65657..818c5b5cf0ef13d28026ecb01243729e8c829841 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
@@ -143,7 +143,7 @@ public function getResource() {
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['image_jpeg_quality'] = array(
+    $form['image_jpeg_quality'] = [
       '#type' => 'number',
       '#title' => t('JPEG quality'),
       '#description' => t('Define the image quality for JPEG manipulations. Ranges from 0 to 100. Higher values mean better image quality but bigger files.'),
@@ -151,7 +151,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
       '#max' => 100,
       '#default_value' => $this->configFactory->getEditable('system.image.gd')->get('jpeg_quality', FALSE),
       '#field_suffix' => t('%'),
-    );
+    ];
     return $form;
   }
 
@@ -160,7 +160,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
    */
   public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
     $this->configFactory->getEditable('system.image.gd')
-      ->set('jpeg_quality', $form_state->getValue(array('gd', 'image_jpeg_quality')))
+      ->set('jpeg_quality', $form_state->getValue(['gd', 'image_jpeg_quality']))
       ->save();
   }
 
@@ -186,13 +186,13 @@ protected function load() {
         // Convert indexed images to truecolor, copying the image to a new
         // truecolor resource, so that filters work correctly and don't result
         // in unnecessary dither.
-        $data = array(
+        $data = [
           'width' => imagesx($resource),
           'height' => imagesy($resource),
           'extension' => image_type_to_extension($this->getType(), FALSE),
           'transparent_color' => $this->getTransparentColor(),
           'is_temp' => TRUE,
-        );
+        ];
         if ($this->apply('create_new', $data)) {
           imagecopy($this->getResource(), $resource, 0, 0, 0, 0, imagesx($resource), imagesy($resource));
           imagedestroy($resource);
@@ -362,13 +362,13 @@ public function getMimeType() {
    * {@inheritdoc}
    */
   public function getRequirements() {
-    $requirements = array();
+    $requirements = [];
 
     $info = gd_info();
-    $requirements['version'] = array(
+    $requirements['version'] = [
       'title' => t('GD library'),
       'value' => $info['GD Version'],
-    );
+    ];
 
     // Check for filter and rotate support.
     if (!function_exists('imagefilter') || !function_exists('imagerotate')) {
@@ -391,7 +391,7 @@ public static function isAvailable() {
    * {@inheritdoc}
    */
   public static function getSupportedExtensions() {
-    $extensions = array();
+    $extensions = [];
     foreach (static::supportedTypes() as $image_type) {
       // @todo Automatically fetch possible extensions for each mime type.
       // @see https://www.drupal.org/node/2311679
@@ -440,7 +440,7 @@ public function extensionToImageType($extension) {
    *   IMAGETYPE_* constant (e.g. IMAGETYPE_JPEG, IMAGETYPE_PNG, etc.).
    */
   protected static function supportedTypes() {
-    return array(IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF);
+    return [IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF];
   }
 
 }
diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Convert.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Convert.php
index 7c5fca146d7711a1b7140fc67fefca39af4ca4f0..5404e2e0035c859a2d3940edd3e875a6d6c2c692 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Convert.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Convert.php
@@ -19,11 +19,11 @@ class Convert extends GDImageToolkitOperationBase {
    * {@inheritdoc}
    */
   protected function arguments() {
-    return array(
-      'extension' => array(
+    return [
+      'extension' => [
         'description' => 'The new extension of the converted image',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -47,13 +47,13 @@ protected function execute(array $arguments) {
     $height = $this->getToolkit()->getHeight();
     $original_resource = $this->getToolkit()->getResource();
     $original_type = $this->getToolkit()->getType();
-    $data = array(
+    $data = [
       'width' => $width,
       'height' => $height,
       'extension' => $arguments['extension'],
       'transparent_color' => $this->getToolkit()->getTransparentColor(),
       'is_temp' => TRUE,
-    );
+    ];
     if ($this->getToolkit()->apply('create_new', $data)) {
       if (imagecopyresampled($this->getToolkit()->getResource(), $original_resource, 0, 0, 0, 0, $width, $height, $width, $height)) {
         imagedestroy($original_resource);
diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/CreateNew.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/CreateNew.php
index 0d1c5a61114f1d85506a0ff13ca543cfdacc8c51..cb57cc489866cbf3e74ee80f51eb49a5b18b2cf7 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/CreateNew.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/CreateNew.php
@@ -21,29 +21,29 @@ class CreateNew extends GDImageToolkitOperationBase {
    * {@inheritdoc}
    */
   protected function arguments() {
-    return array(
-      'width' => array(
+    return [
+      'width' => [
         'description' => 'The width of the image, in pixels',
-      ),
-      'height' => array(
+      ],
+      'height' => [
         'description' => 'The height of the image, in pixels',
-      ),
-      'extension' => array(
+      ],
+      'extension' => [
         'description' => 'The extension of the image file (e.g. png, gif, etc.)',
         'required' => FALSE,
         'default' => 'png',
-      ),
-      'transparent_color' => array(
+      ],
+      'transparent_color' => [
         'description' => 'The RGB hex color for GIF transparency',
         'required' => FALSE,
         'default' => '#ffffff',
-      ),
-      'is_temp' => array(
+      ],
+      'is_temp' => [
         'description' => 'If TRUE, this operation is being used to create a temporary image by another GD operation. After performing its function, the caller is responsible for destroying the original GD resource.',
         'required' => FALSE,
         'default' => FALSE,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php
index e5ca672f0bd52f022d49b4eab7d9de6c176c446e..07a112b91088518cd96511d45b2ef47153cb7c92 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php
@@ -19,24 +19,24 @@ class Crop extends GDImageToolkitOperationBase {
    * {@inheritdoc}
    */
   protected function arguments() {
-    return array(
-      'x' => array(
+    return [
+      'x' => [
         'description' => 'The starting x offset at which to start the crop, in pixels',
-      ),
-      'y' => array(
+      ],
+      'y' => [
         'description' => 'The starting y offset at which to start the crop, in pixels',
-      ),
-      'width' => array(
+      ],
+      'width' => [
         'description' => 'The width of the cropped area, in pixels',
         'required' => FALSE,
         'default' => NULL,
-      ),
-      'height' => array(
+      ],
+      'height' => [
         'description' => 'The height of the cropped area, in pixels',
         'required' => FALSE,
         'default' => NULL,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -54,7 +54,7 @@ protected function validateArguments(array $arguments) {
     $arguments['width'] = empty($arguments['width']) ? $arguments['height'] / $aspect : $arguments['width'];
 
     // Assure integers for all arguments.
-    foreach (array('x', 'y', 'width', 'height') as $key) {
+    foreach (['x', 'y', 'width', 'height'] as $key) {
       $arguments[$key] = (int) round($arguments[$key]);
     }
 
@@ -77,13 +77,13 @@ protected function execute(array $arguments) {
     // the original resource on it with resampling. Destroy the original
     // resource upon success.
     $original_resource = $this->getToolkit()->getResource();
-    $data = array(
+    $data = [
       'width' => $arguments['width'],
       'height' => $arguments['height'],
       'extension' => image_type_to_extension($this->getToolkit()->getType(), FALSE),
       'transparent_color' => $this->getToolkit()->getTransparentColor(),
       'is_temp' => TRUE,
-    );
+    ];
     if ($this->getToolkit()->apply('create_new', $data)) {
       if (imagecopyresampled($this->getToolkit()->getResource(), $original_resource, 0, 0, $arguments['x'], $arguments['y'], $arguments['width'], $arguments['height'], $arguments['width'], $arguments['height'])) {
         imagedestroy($original_resource);
diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Desaturate.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Desaturate.php
index bae8483ef50553c0a5cb23eaecca537af777aae3..54ed29b9be99c7fada3d9553bcba97f1ebfb4140 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Desaturate.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Desaturate.php
@@ -20,7 +20,7 @@ class Desaturate extends GDImageToolkitOperationBase {
    */
   protected function arguments() {
     // This operation does not use any parameters.
-    return array();
+    return [];
   }
 
   /**
@@ -29,7 +29,7 @@ protected function arguments() {
   protected function execute(array $arguments) {
     // PHP installations using non-bundled GD do not have imagefilter.
     if (!function_exists('imagefilter')) {
-      $this->logger->notice("The image '@file' could not be desaturated because the imagefilter() function is not available in this PHP installation.", array('@file' => $this->getToolkit()->getSource()));
+      $this->logger->notice("The image '@file' could not be desaturated because the imagefilter() function is not available in this PHP installation.", ['@file' => $this->getToolkit()->getSource()]);
       return FALSE;
     }
 
diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Resize.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Resize.php
index 51c5f53a7d82d99d8eb3f09c5bec80d44d41b51a..155bef24641d758b27f3ebeeb04673f6dad29ceb 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Resize.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Resize.php
@@ -19,14 +19,14 @@ class Resize extends GDImageToolkitOperationBase {
    * {@inheritdoc}
    */
   protected function arguments() {
-    return array(
-      'width' => array(
+    return [
+      'width' => [
         'description' => 'The new width of the resized image, in pixels',
-      ),
-      'height' => array(
+      ],
+      'height' => [
         'description' => 'The new height of the resized image, in pixels',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -51,18 +51,18 @@ protected function validateArguments(array $arguments) {
   /**
    * {@inheritdoc}
    */
-  protected function execute(array $arguments = array()) {
+  protected function execute(array $arguments = []) {
     // Create a new resource of the required dimensions, and copy and resize
     // the original resource on it with resampling. Destroy the original
     // resource upon success.
     $original_resource = $this->getToolkit()->getResource();
-    $data = array(
+    $data = [
       'width' => $arguments['width'],
       'height' => $arguments['height'],
       'extension' => image_type_to_extension($this->getToolkit()->getType(), FALSE),
       'transparent_color' => $this->getToolkit()->getTransparentColor(),
       'is_temp' => TRUE,
-    );
+    ];
     if ($this->getToolkit()->apply('create_new', $data)) {
       if (imagecopyresampled($this->getToolkit()->getResource(), $original_resource, 0, 0, 0, 0, $arguments['width'], $arguments['height'], imagesx($original_resource), imagesy($original_resource))) {
         imagedestroy($original_resource);
diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php
index 62a5405d7e8564da856f14246a0ccf20dfdb8ed1..433561253105d501912bde275f5313a69d9e5698 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php
@@ -21,16 +21,16 @@ class Rotate extends GDImageToolkitOperationBase {
    * {@inheritdoc}
    */
   protected function arguments() {
-    return array(
-      'degrees' => array(
+    return [
+      'degrees' => [
         'description' => 'The number of (clockwise) degrees to rotate the image',
-      ),
-      'background' => array(
+      ],
+      'background' => [
         'description' => "A string specifying the hexadecimal color code to use as background for the uncovered area of the image after the rotation. E.g. '#000000' for black, '#ff00ff' for magenta, and '#ffffff' for white. For images that support transparency, this will default to transparent white",
         'required' => FALSE,
         'default' => NULL,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -45,11 +45,11 @@ protected function validateArguments(array $arguments) {
     // Validate or set background color argument.
     if (!empty($arguments['background'])) {
       // Validate the background color: Color::hexToRgb does so for us.
-      $background = Color::hexToRgb($arguments['background']) + array( 'alpha' => 0 );
+      $background = Color::hexToRgb($arguments['background']) + [ 'alpha' => 0 ];
     }
     else {
       // Background color is not specified: use transparent white as background.
-      $background = array('red' => 255, 'green' => 255, 'blue' => 255, 'alpha' => 127);
+      $background = ['red' => 255, 'green' => 255, 'blue' => 255, 'alpha' => 127];
     }
     // Store the color index for the background as that is what GD uses.
     $arguments['background_idx'] = imagecolorallocatealpha($this->getToolkit()->getResource(), $background['red'], $background['green'], $background['blue'], $background['alpha']);
@@ -89,7 +89,7 @@ protected function validateArguments(array $arguments) {
   protected function execute(array $arguments) {
     // PHP installations using non-bundled GD do not have imagerotate.
     if (!function_exists('imagerotate')) {
-      $this->logger->notice('The image %file could not be rotated because the imagerotate() function is not available in this PHP installation.', array('%file' => $this->getToolkit()->getSource()));
+      $this->logger->notice('The image %file could not be rotated because the imagerotate() function is not available in this PHP installation.', ['%file' => $this->getToolkit()->getSource()]);
       return FALSE;
     }
 
diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Scale.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Scale.php
index bd7a95278bac848fd803f5e837a911f4ff235ebc..37097d864ee93fe2f7acd6e33de5379436fd601b 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Scale.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Scale.php
@@ -19,23 +19,23 @@ class Scale extends Resize {
    * {@inheritdoc}
    */
   protected function arguments() {
-    return array(
-      'width' => array(
+    return [
+      'width' => [
         'description' => 'The target width, in pixels. This value is omitted then the scaling will based only on the height value',
         'required' => FALSE,
         'default' => NULL,
-      ),
-      'height' => array(
+      ],
+      'height' => [
         'description' => 'The target height, in pixels. This value is omitted then the scaling will based only on the width value',
         'required' => FALSE,
         'default' => NULL,
-      ),
-      'upscale' => array(
+      ],
+      'upscale' => [
         'description' => 'Boolean indicating that files smaller than the dimensions will be scaled up. This generally results in a low quality image',
         'required' => FALSE,
         'default' => FALSE,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -78,7 +78,7 @@ protected function validateArguments(array $arguments) {
   /**
    * {@inheritdoc}
    */
-  protected function execute(array $arguments = array()) {
+  protected function execute(array $arguments = []) {
     // Don't scale if we don't change the dimensions at all.
     if ($arguments['width'] !== $this->getToolkit()->getWidth() || $arguments['height'] !== $this->getToolkit()->getHeight()) {
       // Don't upscale if the option isn't enabled.
diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php
index 8568823bf04a69755e87eab65b0b305408425b14..510020f8d8c85b4edc70dd1f25e68ee3bcddaea7 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php
@@ -19,14 +19,14 @@ class ScaleAndCrop extends GDImageToolkitOperationBase {
    * {@inheritdoc}
    */
   protected function arguments() {
-    return array(
-      'width' => array(
+    return [
+      'width' => [
         'description' => 'The target width, in pixels',
-      ),
-      'height' => array(
+      ],
+      'height' => [
         'description' => 'The target height, in pixels',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -40,10 +40,10 @@ protected function validateArguments(array $arguments) {
 
     $arguments['x'] = (int) round(($actualWidth * $scaleFactor - $arguments['width']) / 2);
     $arguments['y'] = (int) round(($actualHeight * $scaleFactor - $arguments['height']) / 2);
-    $arguments['resize'] = array(
+    $arguments['resize'] = [
       'width' => (int) round($actualWidth * $scaleFactor),
       'height' => (int) round($actualHeight * $scaleFactor),
-    );
+    ];
 
     // Fail when width or height are 0 or negative.
     if ($arguments['width'] <= 0) {
@@ -59,7 +59,7 @@ protected function validateArguments(array $arguments) {
   /**
    * {@inheritdoc}
    */
-  protected function execute(array $arguments = array()) {
+  protected function execute(array $arguments = []) {
     return $this->getToolkit()->apply('resize', $arguments['resize'])
         && $this->getToolkit()->apply('crop', $arguments);
   }
diff --git a/core/modules/system/src/Plugin/migrate/source/Menu.php b/core/modules/system/src/Plugin/migrate/source/Menu.php
index 6dbf2e7a4c384a58a31bc951859c6fccd3a50038..c55bc4bb7fd44473374a912881835058376e9267 100644
--- a/core/modules/system/src/Plugin/migrate/source/Menu.php
+++ b/core/modules/system/src/Plugin/migrate/source/Menu.php
@@ -25,11 +25,11 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'menu_name' => $this->t('The menu name. Primary key.'),
       'title' => $this->t('The human-readable name of the menu.'),
       'description' => $this->t('A description of the menu'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/system/src/Plugin/views/field/BulkForm.php b/core/modules/system/src/Plugin/views/field/BulkForm.php
index 8e38c2b73262bda2459df0dbe987ec802e7c8fc4..65fdc51cc73388ae608ee32a8f2a30bc9eaf50c2 100644
--- a/core/modules/system/src/Plugin/views/field/BulkForm.php
+++ b/core/modules/system/src/Plugin/views/field/BulkForm.php
@@ -49,7 +49,7 @@ class BulkForm extends FieldPluginBase implements CacheableDependencyInterface {
    *
    * @var \Drupal\system\ActionConfigEntityInterface[]
    */
-  protected $actions = array();
+  protected $actions = [];
 
   /**
    * The language manager.
@@ -162,13 +162,13 @@ protected function getView() {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['action_title'] = array('default' => $this->t('Action'));
-    $options['include_exclude'] = array(
+    $options['action_title'] = ['default' => $this->t('Action')];
+    $options['include_exclude'] = [
       'default' => 'exclude',
-    );
-    $options['selected_actions'] = array(
-      'default' => array(),
-    );
+    ];
+    $options['selected_actions'] = [
+      'default' => [],
+    ];
     return $options;
   }
 
@@ -176,28 +176,28 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['action_title'] = array(
+    $form['action_title'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Action title'),
       '#default_value' => $this->options['action_title'],
       '#description' => $this->t('The title shown above the actions dropdown.'),
-    );
+    ];
 
-    $form['include_exclude'] = array(
+    $form['include_exclude'] = [
       '#type' => 'radios',
       '#title' => $this->t('Available actions'),
-      '#options' => array(
+      '#options' => [
         'exclude' => $this->t('All actions, except selected'),
         'include' => $this->t('Only selected actions'),
-      ),
+      ],
       '#default_value' => $this->options['include_exclude'],
-    );
-    $form['selected_actions'] = array(
+    ];
+    $form['selected_actions'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Selected actions'),
       '#options' => $this->getBulkOptions(FALSE),
       '#default_value' => $this->options['selected_actions'],
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
@@ -208,8 +208,8 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
     parent::validateOptionsForm($form, $form_state);
 
-    $selected_actions = $form_state->getValue(array('options', 'selected_actions'));
-    $form_state->setValue(array('options', 'selected_actions'), array_values(array_filter($selected_actions)));
+    $selected_actions = $form_state->getValue(['options', 'selected_actions']);
+    $form_state->setValue(['options', 'selected_actions'], array_values(array_filter($selected_actions)));
   }
 
   /**
@@ -259,7 +259,7 @@ public function viewsForm(&$form, FormStateInterface $form_state) {
       foreach ($this->view->result as $row_index => $row) {
         $entity = $this->getEntityTranslation($this->getEntity($row), $row);
 
-        $form[$this->options['id']][$row_index] = array(
+        $form[$this->options['id']][$row_index] = [
           '#type' => 'checkbox',
           // We are not able to determine a main "title" for each row, so we can
           // only output a generic label.
@@ -267,28 +267,28 @@ public function viewsForm(&$form, FormStateInterface $form_state) {
           '#title_display' => 'invisible',
           '#default_value' => !empty($form_state->getValue($this->options['id'])[$row_index]) ? 1 : NULL,
           '#return_value' => $this->calculateEntityBulkFormKey($entity, $use_revision),
-        );
+        ];
       }
 
       // Replace the form submit button label.
       $form['actions']['submit']['#value'] = $this->t('Apply to selected items');
 
       // Ensure a consistent container for filters/operations in the view header.
-      $form['header'] = array(
+      $form['header'] = [
         '#type' => 'container',
         '#weight' => -100,
-      );
+      ];
 
       // Build the bulk operations action widget for the header.
       // Allow themes to apply .container-inline on this separate container.
-      $form['header'][$this->options['id']] = array(
+      $form['header'][$this->options['id']] = [
         '#type' => 'container',
-      );
-      $form['header'][$this->options['id']]['action'] = array(
+      ];
+      $form['header'][$this->options['id']]['action'] = [
         '#type' => 'select',
         '#title' => $this->options['action_title'],
         '#options' => $this->getBulkOptions(),
-      );
+      ];
 
       // Duplicate the form actions into the action container in the header.
       $form['header'][$this->options['id']]['actions'] = $form['actions'];
@@ -308,7 +308,7 @@ public function viewsForm(&$form, FormStateInterface $form_state) {
    *   An associative array of operations, suitable for a select element.
    */
   protected function getBulkOptions($filtered = TRUE) {
-    $options = array();
+    $options = [];
     // Filter the action list.
     foreach ($this->actions as $id => $action) {
       if ($filtered) {
@@ -349,7 +349,7 @@ public function viewsFormSubmit(&$form, FormStateInterface $form_state) {
       // bulk form is submitted, which can lead to data loss.
       $user_input = $form_state->getUserInput();
       $selected = array_filter($user_input[$this->options['id']]);
-      $entities = array();
+      $entities = [];
       $action = $this->actions[$form_state->getValue('action')];
       $count = 0;
 
@@ -375,18 +375,18 @@ public function viewsFormSubmit(&$form, FormStateInterface $form_state) {
 
       $operation_definition = $action->getPluginDefinition();
       if (!empty($operation_definition['confirm_form_route_name'])) {
-        $options = array(
+        $options = [
           'query' => $this->getDestinationArray(),
-        );
-        $form_state->setRedirect($operation_definition['confirm_form_route_name'], array(), $options);
+        ];
+        $form_state->setRedirect($operation_definition['confirm_form_route_name'], [], $options);
       }
       else {
         // Don't display the message unless there are some elements affected and
         // there is no confirmation form.
         if ($count) {
-          drupal_set_message($this->formatPlural($count, '%action was applied to @count item.', '%action was applied to @count items.', array(
+          drupal_set_message($this->formatPlural($count, '%action was applied to @count item.', '%action was applied to @count items.', [
             '%action' => $action->label(),
-          )));
+          ]));
         }
       }
     }
diff --git a/core/modules/system/src/SystemConfigSubscriber.php b/core/modules/system/src/SystemConfigSubscriber.php
index 3c0de5fa43c5b47b83053217decb4a139bc9dad5..ddd37be37a6fbb644208ad034a2377750dfcad53 100644
--- a/core/modules/system/src/SystemConfigSubscriber.php
+++ b/core/modules/system/src/SystemConfigSubscriber.php
@@ -81,11 +81,11 @@ public function onConfigImporterValidateSiteUUID(ConfigImporterEvent $event) {
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    $events[ConfigEvents::SAVE][] = array('onConfigSave', 0);
+    $events[ConfigEvents::SAVE][] = ['onConfigSave', 0];
     // The empty check has a high priority so that it can stop propagation if
     // there is no configuration to import.
-    $events[ConfigEvents::IMPORT_VALIDATE][] = array('onConfigImporterValidateNotEmpty', 512);
-    $events[ConfigEvents::IMPORT_VALIDATE][] = array('onConfigImporterValidateSiteUUID', 256);
+    $events[ConfigEvents::IMPORT_VALIDATE][] = ['onConfigImporterValidateNotEmpty', 512];
+    $events[ConfigEvents::IMPORT_VALIDATE][] = ['onConfigImporterValidateSiteUUID', 256];
     return $events;
   }
 
diff --git a/core/modules/system/src/SystemManager.php b/core/modules/system/src/SystemManager.php
index b9fcebb12ddec56e45ea2e077d8a576d59efd6d7..d2e03443db4954a639837ec1843fe42b1409c734 100644
--- a/core/modules/system/src/SystemManager.php
+++ b/core/modules/system/src/SystemManager.php
@@ -109,7 +109,7 @@ public function listRequirements() {
     drupal_load_updates();
 
     // Check run-time requirements and status information.
-    $requirements = $this->moduleHandler->invokeAll('requirements', array('runtime'));
+    $requirements = $this->moduleHandler->invokeAll('requirements', ['runtime']);
     uasort($requirements, function($a, $b) {
       if (!isset($a['weight'])) {
         if (!isset($b['weight'])) {
@@ -159,15 +159,15 @@ public function getBlockContents() {
     // or elsewhere could give us a blank block.
     $link = $this->menuActiveTrail->getActiveLink('admin');
     if ($link && $content = $this->getAdminBlock($link)) {
-      $output = array(
+      $output = [
         '#theme' => 'admin_block_content',
         '#content' => $content,
-      );
+      ];
     }
     else {
-      $output = array(
+      $output = [
         '#markup' => t('You do not have any administrative items.'),
-      );
+      ];
     }
     return $output;
   }
@@ -182,16 +182,16 @@ public function getBlockContents() {
    *   An array of menu items, as expected by admin-block-content.html.twig.
    */
   public function getAdminBlock(MenuLinkInterface $instance) {
-    $content = array();
+    $content = [];
     // Only find the children of this link.
     $link_id = $instance->getPluginId();
     $parameters = new MenuTreeParameters();
     $parameters->setRoot($link_id)->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
     $tree = $this->menuTree->load(NULL, $parameters);
-    $manipulators = array(
-      array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-      array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
-    );
+    $manipulators = [
+      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+      ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+    ];
     $tree = $this->menuTree->transform($tree, $manipulators);
     foreach ($tree as $key => $element) {
       // Only render accessible links.
diff --git a/core/modules/system/src/Tests/Ajax/AjaxInGroupTest.php b/core/modules/system/src/Tests/Ajax/AjaxInGroupTest.php
index 4ca7390a1cb27bf3378224e6c36ce36d16ae481c..cb45e2dcf0b81bd435ac3be8a6309825c3501feb 100644
--- a/core/modules/system/src/Tests/Ajax/AjaxInGroupTest.php
+++ b/core/modules/system/src/Tests/Ajax/AjaxInGroupTest.php
@@ -11,7 +11,7 @@ class AjaxInGroupTest extends AjaxTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalLogin($this->drupalCreateUser(array('access content')));
+    $this->drupalLogin($this->drupalCreateUser(['access content']));
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Ajax/AjaxTestBase.php b/core/modules/system/src/Tests/Ajax/AjaxTestBase.php
index e4db3bd9c2e1f1527da462bf245005785daa1506..66e06c88a467147c0d616b876e186f6d2db1bd42 100644
--- a/core/modules/system/src/Tests/Ajax/AjaxTestBase.php
+++ b/core/modules/system/src/Tests/Ajax/AjaxTestBase.php
@@ -14,7 +14,7 @@ abstract class AjaxTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'ajax_test', 'ajax_forms_test');
+  public static $modules = ['node', 'ajax_test', 'ajax_forms_test'];
 
   /**
    * Asserts the array of Ajax commands contains the searched command.
diff --git a/core/modules/system/src/Tests/Ajax/CommandsTest.php b/core/modules/system/src/Tests/Ajax/CommandsTest.php
index 7e26fa39d7f4e72f809d2fdc9235b733fb6c212d..b09d42a0447cc88b103b5aa0bb64741f40431eaa 100644
--- a/core/modules/system/src/Tests/Ajax/CommandsTest.php
+++ b/core/modules/system/src/Tests/Ajax/CommandsTest.php
@@ -34,89 +34,89 @@ class CommandsTest extends AjaxTestBase {
    */
   function testAjaxCommands() {
     $form_path = 'ajax_forms_test_ajax_commands_form';
-    $web_user = $this->drupalCreateUser(array('access content'));
+    $web_user = $this->drupalCreateUser(['access content']);
     $this->drupalLogin($web_user);
 
-    $edit = array();
+    $edit = [];
 
     // Tests the 'add_css' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'add_css' command")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'add_css' command")]);
     $expected = new AddCssCommand('my/file.css');
     $this->assertCommand($commands, $expected->render(), "'add_css' AJAX command issued with correct data.");
 
     // Tests the 'after' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'After': Click to put something after the div")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'After': Click to put something after the div")]);
     $expected = new AfterCommand('#after_div', 'This will be placed after');
     $this->assertCommand($commands, $expected->render(), "'after' AJAX command issued with correct data.");
 
     // Tests the 'alert' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'Alert': Click to alert")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'Alert': Click to alert")]);
     $expected = new AlertCommand(t('Alert'));
     $this->assertCommand($commands, $expected->render(), "'alert' AJAX Command issued with correct text.");
 
     // Tests the 'append' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'Append': Click to append something")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'Append': Click to append something")]);
     $expected = new AppendCommand('#append_div', 'Appended text');
     $this->assertCommand($commands, $expected->render(), "'append' AJAX command issued with correct data.");
 
     // Tests the 'before' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'before': Click to put something before the div")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'before': Click to put something before the div")]);
     $expected = new BeforeCommand('#before_div', 'Before text');
     $this->assertCommand($commands, $expected->render(), "'before' AJAX command issued with correct data.");
 
     // Tests the 'changed' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX changed: Click to mark div changed.")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX changed: Click to mark div changed.")]);
     $expected = new ChangedCommand('#changed_div');
     $this->assertCommand($commands, $expected->render(), "'changed' AJAX command issued with correct selector.");
 
     // Tests the 'changed' command using the second argument.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX changed: Click to mark div changed with asterisk.")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX changed: Click to mark div changed with asterisk.")]);
     $expected = new ChangedCommand('#changed_div', '#changed_div_mark_this');
     $this->assertCommand($commands, $expected->render(), "'changed' AJAX command (with asterisk) issued with correct selector.");
 
     // Tests the 'css' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("Set the '#box' div to be blue.")));
-    $expected = new CssCommand('#css_div', array('background-color' => 'blue'));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("Set the '#box' div to be blue.")]);
+    $expected = new CssCommand('#css_div', ['background-color' => 'blue']);
     $this->assertCommand($commands, $expected->render(), "'css' AJAX command issued with correct selector.");
 
     // Tests the 'data' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX data command: Issue command.")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX data command: Issue command.")]);
     $expected = new DataCommand('#data_div', 'testkey', 'testvalue');
     $this->assertCommand($commands, $expected->render(), "'data' AJAX command issued with correct key and value.");
 
     // Tests the 'html' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX html: Replace the HTML in a selector.")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX html: Replace the HTML in a selector.")]);
     $expected = new HtmlCommand('#html_div', 'replacement text');
     $this->assertCommand($commands, $expected->render(), "'html' AJAX command issued with correct data.");
 
     // Tests the 'insert' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX insert: Let client insert based on #ajax['method'].")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX insert: Let client insert based on #ajax['method'].")]);
     $expected = new InsertCommand('#insert_div', 'insert replacement text');
     $this->assertCommand($commands, $expected->render(), "'insert' AJAX command issued with correct data.");
 
     // Tests the 'invoke' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX invoke command: Invoke addClass() method.")));
-    $expected = new InvokeCommand('#invoke_div', 'addClass', array('error'));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX invoke command: Invoke addClass() method.")]);
+    $expected = new InvokeCommand('#invoke_div', 'addClass', ['error']);
     $this->assertCommand($commands, $expected->render(), "'invoke' AJAX command issued with correct method and argument.");
 
     // Tests the 'prepend' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'prepend': Click to prepend something")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'prepend': Click to prepend something")]);
     $expected = new PrependCommand('#prepend_div', 'prepended text');
     $this->assertCommand($commands, $expected->render(), "'prepend' AJAX command issued with correct data.");
 
     // Tests the 'remove' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'remove': Click to remove text")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'remove': Click to remove text")]);
     $expected = new RemoveCommand('#remove_text');
     $this->assertCommand($commands, $expected->render(), "'remove' AJAX command issued with correct command and selector.");
 
     // Tests the 'restripe' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'restripe' command")));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'restripe' command")]);
     $expected = new RestripeCommand('#restripe_table');
     $this->assertCommand($commands, $expected->render(), "'restripe' AJAX command issued with correct selector.");
 
     // Tests the 'settings' command.
-    $commands = $this->drupalPostAjaxForm($form_path, $edit, array('op' => t("AJAX 'settings' command")));
-    $expected = new SettingsCommand(array('ajax_forms_test' => array('foo' => 42)));
+    $commands = $this->drupalPostAjaxForm($form_path, $edit, ['op' => t("AJAX 'settings' command")]);
+    $expected = new SettingsCommand(['ajax_forms_test' => ['foo' => 42]]);
     $this->assertCommand($commands, $expected->render(), "'settings' AJAX command issued with correct data.");
   }
 
diff --git a/core/modules/system/src/Tests/Ajax/DialogTest.php b/core/modules/system/src/Tests/Ajax/DialogTest.php
index 254f01d33ae08cba720dfd5b843b12aec5033cdf..ec947825fe2d0c022286bb8557231aac06d50102 100644
--- a/core/modules/system/src/Tests/Ajax/DialogTest.php
+++ b/core/modules/system/src/Tests/Ajax/DialogTest.php
@@ -19,72 +19,72 @@ class DialogTest extends AjaxTestBase {
    *
    * @var array
    */
-  public static $modules = array('ajax_test', 'ajax_forms_test', 'contact');
+  public static $modules = ['ajax_test', 'ajax_forms_test', 'contact'];
 
   /**
    * Test sending non-JS and AJAX requests to open and manipulate modals.
    */
   public function testDialog() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer contact forms')));
+    $this->drupalLogin($this->drupalCreateUser(['administer contact forms']));
     // Ensure the elements render without notices or exceptions.
     $this->drupalGet('ajax-test/dialog');
 
     // Set up variables for this test.
     $dialog_renderable = AjaxTestController::dialogContents();
     $dialog_contents = \Drupal::service('renderer')->renderRoot($dialog_renderable);
-    $modal_expected_response = array(
+    $modal_expected_response = [
       'command' => 'openDialog',
       'selector' => '#drupal-modal',
       'settings' => NULL,
       'data' => $dialog_contents,
-      'dialogOptions' => array(
+      'dialogOptions' => [
         'modal' => TRUE,
         'title' => 'AJAX Dialog & contents',
-      ),
-    );
-    $form_expected_response = array(
+      ],
+    ];
+    $form_expected_response = [
       'command' => 'openDialog',
       'selector' => '#drupal-modal',
       'settings' => NULL,
-      'dialogOptions' => array(
+      'dialogOptions' => [
         'modal' => TRUE,
         'title' => 'Ajax Form contents',
-      ),
-    );
-    $entity_form_expected_response = array(
+      ],
+    ];
+    $entity_form_expected_response = [
       'command' => 'openDialog',
       'selector' => '#drupal-modal',
       'settings' => NULL,
-      'dialogOptions' => array(
+      'dialogOptions' => [
         'modal' => TRUE,
         'title' => 'Add contact form',
-      ),
-    );
-    $normal_expected_response = array(
+      ],
+    ];
+    $normal_expected_response = [
       'command' => 'openDialog',
       'selector' => '#ajax-test-dialog-wrapper-1',
       'settings' => NULL,
       'data' => $dialog_contents,
-      'dialogOptions' => array(
+      'dialogOptions' => [
         'modal' => FALSE,
         'title' => 'AJAX Dialog & contents',
-      ),
-    );
-    $no_target_expected_response = array(
+      ],
+    ];
+    $no_target_expected_response = [
       'command' => 'openDialog',
       'selector' => '#drupal-dialog-ajax-testdialog-contents',
       'settings' => NULL,
       'data' => $dialog_contents,
-      'dialogOptions' => array(
+      'dialogOptions' => [
         'modal' => FALSE,
         'title' => 'AJAX Dialog & contents',
-      ),
-    );
-    $close_expected_response = array(
+      ],
+    ];
+    $close_expected_response = [
       'command' => 'closeDialog',
       'selector' => '#ajax-test-dialog-wrapper-1',
       'persist' => FALSE,
-    );
+    ];
 
     // Check that requesting a modal dialog without JS goes to a page.
     $this->drupalGet('ajax-test/dialog-contents');
@@ -95,7 +95,7 @@ public function testDialog() {
     $this->assertRaw($dialog_contents, 'Modal dialog page on XMLHttpRequest present.');
 
     // Emulate going to the JS version of the page and check the JSON response.
-    $ajax_result = $this->drupalGetAjax('ajax-test/dialog-contents', array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_modal')));
+    $ajax_result = $this->drupalGetAjax('ajax-test/dialog-contents', ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_modal']]);
     $this->assertEqual($modal_expected_response, $ajax_result[3], 'Modal dialog JSON response matches.');
     // Test the HTML escaping of & character.
     $this->assertEqual($ajax_result[3]['dialogOptions']['title'], 'AJAX Dialog & contents');
@@ -108,26 +108,26 @@ public function testDialog() {
     // Emulate going to the JS version of the page and check the JSON response.
     // This needs to use WebTestBase::drupalPostAjaxForm() so that the correct
     // dialog options are sent.
-    $ajax_result = $this->drupalPostAjaxForm('ajax-test/dialog', array(
+    $ajax_result = $this->drupalPostAjaxForm('ajax-test/dialog', [
         // We have to mock a form element to make drupalPost submit from a link.
         'textfield' => 'test',
-      ), array(), 'ajax-test/dialog-contents', array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_dialog')), array(), NULL, array(
-      'submit' => array(
+      ], [], 'ajax-test/dialog-contents', ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_dialog']], [], NULL, [
+      'submit' => [
         'dialogOptions[target]' => 'ajax-test-dialog-wrapper-1',
-      )
-    ));
+      ]
+    ]);
     $this->assertEqual($normal_expected_response, $ajax_result[3], 'Normal dialog JSON response matches.');
 
     // Emulate going to the JS version of the page and check the JSON response.
     // This needs to use WebTestBase::drupalPostAjaxForm() so that the correct
     // dialog options are sent.
-    $ajax_result = $this->drupalPostAjaxForm('ajax-test/dialog', array(
+    $ajax_result = $this->drupalPostAjaxForm('ajax-test/dialog', [
         // We have to mock a form element to make drupalPost submit from a link.
         'textfield' => 'test',
-      ), array(), 'ajax-test/dialog-contents', array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_dialog')), array(), NULL, array(
+      ], [], 'ajax-test/dialog-contents', ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_dialog']], [], NULL, [
       // Don't send a target.
-      'submit' => array()
-    ));
+      'submit' => []
+    ]);
     // Make sure the selector ID starts with the right string.
     $this->assert(strpos($ajax_result[3]['selector'], $no_target_expected_response['selector']) === 0, 'Selector starts with right string.');
     unset($ajax_result[3]['selector']);
@@ -142,7 +142,7 @@ public function testDialog() {
     // Test submitting via a POST request through the button for modals. This
     // approach more accurately reflects the real responses by Drupal because
     // all of the necessary page variables are emulated.
-    $ajax_result = $this->drupalPostAjaxForm('ajax-test/dialog', array(), 'button1');
+    $ajax_result = $this->drupalPostAjaxForm('ajax-test/dialog', [], 'button1');
 
     // Check that CSS and JavaScript are "added" to the page dynamically.
     $this->assertTrue(in_array('core/drupal.dialog.ajax', explode(',', $ajax_result[0]['settings']['ajaxPageState']['libraries'])), 'core/drupal.dialog.ajax library is added to the page.');
@@ -159,7 +159,7 @@ public function testDialog() {
     $this->assertNotEqual($ajax_result[4]['dialogOptions']['title'], 'AJAX Dialog &amp; contents');
 
     // Abbreviated test for "normal" dialogs, testing only the difference.
-    $ajax_result = $this->drupalPostAjaxForm('ajax-test/dialog', array(), 'button2');
+    $ajax_result = $this->drupalPostAjaxForm('ajax-test/dialog', [], 'button2');
     $this->assertEqual($normal_expected_response, $ajax_result[4], 'POST request normal dialog JSON response matches.');
 
     // Check that requesting a form dialog without JS goes to a page.
@@ -170,7 +170,7 @@ public function testDialog() {
     $this->assertTrue(!empty($form), 'Non-JS form page present.');
 
     // Emulate going to the JS version of the form and check the JSON response.
-    $ajax_result = $this->drupalGetAjax('ajax-test/dialog-form', array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_modal')));
+    $ajax_result = $this->drupalGetAjax('ajax-test/dialog-form', ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_modal']]);
     $expected_ajax_settings = [
       'edit-preview' => [
         'callback' => '::preview',
@@ -202,7 +202,7 @@ public function testDialog() {
     $this->assertTrue(!empty($form), 'Non-JS entity form page present.');
 
     // Emulate going to the JS version of the form and check the JSON response.
-    $ajax_result = $this->drupalGetAjax('admin/structure/contact/add', array('query' => array(MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_modal')));
+    $ajax_result = $this->drupalGetAjax('admin/structure/contact/add', ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_modal']]);
     $this->setRawContent($ajax_result[3]['data']);
     // Remove the data, the form build id and token will never match.
     unset($ajax_result[3]['data']);
diff --git a/core/modules/system/src/Tests/Ajax/ElementValidationTest.php b/core/modules/system/src/Tests/Ajax/ElementValidationTest.php
index 5133ce3767ebb7f9085e507f1c493e640f7bf9bb..ceb5405c167d0756483847c88ed095ed76318adb 100644
--- a/core/modules/system/src/Tests/Ajax/ElementValidationTest.php
+++ b/core/modules/system/src/Tests/Ajax/ElementValidationTest.php
@@ -17,7 +17,7 @@ class ElementValidationTest extends AjaxTestBase {
    * Ajax-enabled field fails due to the required field being empty.
    */
   function testAjaxElementValidation() {
-    $edit = array('drivertext' => t('some dumb text'));
+    $edit = ['drivertext' => t('some dumb text')];
 
     // Post with 'drivertext' as the triggering element.
     $this->drupalPostAjaxForm('ajax_validation_test', $edit, 'drivertext');
@@ -26,7 +26,7 @@ function testAjaxElementValidation() {
     $this->assertText('ajax_forms_test_validation_form_callback invoked', 'The correct callback was invoked');
 
     $this->drupalGet('ajax_validation_test');
-    $edit = array('drivernumber' => 12345);
+    $edit = ['drivernumber' => 12345];
 
     // Post with 'drivernumber' as the triggering element.
     $this->drupalPostAjaxForm('ajax_validation_test', $edit, 'drivernumber');
diff --git a/core/modules/system/src/Tests/Ajax/FormValuesTest.php b/core/modules/system/src/Tests/Ajax/FormValuesTest.php
index 0a23db18432d292dbfc9e6f5d5c3eda724c81658..3d7bc91bced47e2b3585317df692d530779cfbf5 100644
--- a/core/modules/system/src/Tests/Ajax/FormValuesTest.php
+++ b/core/modules/system/src/Tests/Ajax/FormValuesTest.php
@@ -13,7 +13,7 @@ class FormValuesTest extends AjaxTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalLogin($this->drupalCreateUser(array('access content')));
+    $this->drupalLogin($this->drupalCreateUser(['access content']));
   }
 
   /**
@@ -21,20 +21,20 @@ protected function setUp() {
    */
   function testSimpleAjaxFormValue() {
     // Verify form values of a select element.
-    foreach (array('red', 'green', 'blue') as $item) {
-      $edit = array(
+    foreach (['red', 'green', 'blue'] as $item) {
+      $edit = [
         'select' => $item,
-      );
+      ];
       $commands = $this->drupalPostAjaxForm('ajax_forms_test_get_form', $edit, 'select');
       $expected = new DataCommand('#ajax_selected_color', 'form_state_value_select', $item);
       $this->assertCommand($commands, $expected->render(), 'Verification of AJAX form values from a selectbox issued with a correct value.');
     }
 
     // Verify form values of a checkbox element.
-    foreach (array(FALSE, TRUE) as $item) {
-      $edit = array(
+    foreach ([FALSE, TRUE] as $item) {
+      $edit = [
         'checkbox' => $item,
-      );
+      ];
       $commands = $this->drupalPostAjaxForm('ajax_forms_test_get_form', $edit, 'checkbox');
       $expected = new DataCommand('#ajax_checkbox_value', 'form_state_value_select', (int) $item);
       $this->assertCommand($commands, $expected->render(), 'Verification of AJAX form values from a checkbox issued with a correct value.');
@@ -46,11 +46,11 @@ function testSimpleAjaxFormValue() {
     // We don't need to check for the X-Drupal-Ajax-Token header with these
     // invalid requests.
     $this->assertAjaxHeader = FALSE;
-    foreach (array('null', 'empty', 'nonexistent') as $key) {
+    foreach (['null', 'empty', 'nonexistent'] as $key) {
       $element_name = 'select_' . $key . '_callback';
-      $edit = array(
+      $edit = [
         $element_name => 'red',
-      );
+      ];
       $commands = $this->drupalPostAjaxForm('ajax_forms_test_get_form', $edit, $element_name);
       $this->assertResponse(500);
     }
diff --git a/core/modules/system/src/Tests/Ajax/FrameworkTest.php b/core/modules/system/src/Tests/Ajax/FrameworkTest.php
index fb59bcc58878e642506a00400ecdbbf36035d163..14bae0644293c02509a0a20b402b042dda23374d 100644
--- a/core/modules/system/src/Tests/Ajax/FrameworkTest.php
+++ b/core/modules/system/src/Tests/Ajax/FrameworkTest.php
@@ -22,7 +22,7 @@ class FrameworkTest extends AjaxTestBase {
   public function testAJAXRender() {
     // Verify that settings command is generated if JavaScript settings exist.
     $commands = $this->drupalGetAjax('ajax-test/render');
-    $expected = new SettingsCommand(array('ajax' => 'test'), TRUE);
+    $expected = new SettingsCommand(['ajax' => 'test'], TRUE);
     $this->assertCommand($commands, $expected->render(), 'JavaScript settings command is present.');
   }
 
@@ -30,14 +30,14 @@ public function testAJAXRender() {
    * Tests AjaxResponse::prepare() AJAX commands ordering.
    */
   public function testOrder() {
-    $expected_commands = array();
+    $expected_commands = [];
 
     // Expected commands, in a very specific order.
     $asset_resolver = \Drupal::service('asset.resolver');
     $css_collection_renderer = \Drupal::service('asset.css.collection_renderer');
     $js_collection_renderer = \Drupal::service('asset.js.collection_renderer');
     $renderer = \Drupal::service('renderer');
-    $expected_commands[0] = new SettingsCommand(array('ajax' => 'test'), TRUE);
+    $expected_commands[0] = new SettingsCommand(['ajax' => 'test'], TRUE);
     $build['#attached']['library'][] = 'ajax_test/order-css-command';
     $assets = AttachedAssets::createFromRenderArray($build);
     $css_render_array = $css_collection_renderer->render($asset_resolver->getCssAssets($assets, FALSE));
@@ -65,7 +65,7 @@ public function testOrder() {
     // 3. JavaScript files in the header
     // 4. JavaScript files in the footer
     // 5. Any other AJAX commands, in whatever order they were added.
-    $commands = $this->drupalPostAjaxForm(NULL, array(), NULL, 'ajax-test/order', array(), array(), NULL, array());
+    $commands = $this->drupalPostAjaxForm(NULL, [], NULL, 'ajax-test/order', [], [], NULL, []);
     $this->assertCommand(array_slice($commands, 0, 1), $expected_commands[0]->render(), 'Settings command is first.');
     $this->assertCommand(array_slice($commands, 1, 1), $expected_commands[1]->render(), 'CSS command is second (and CSS files are ordered correctly).');
     $this->assertCommand(array_slice($commands, 2, 1), $expected_commands[2]->render(), 'Header JS command is third.');
@@ -78,10 +78,10 @@ public function testOrder() {
    */
   public function testAJAXRenderError() {
     // Verify custom error message.
-    $edit = array(
+    $edit = [
       'message' => 'Custom error message.',
-    );
-    $commands = $this->drupalGetAjax('ajax-test/render-error', array('query' => $edit));
+    ];
+    $commands = $this->drupalGetAjax('ajax-test/render-error', ['query' => $edit]);
     $expected = new AlertCommand($edit['message']);
     $this->assertCommand($commands, $expected->render(), 'Custom error message is output.');
   }
@@ -95,12 +95,12 @@ public function testLazyLoad() {
     $js_collection_renderer = \Drupal::service('asset.js.collection_renderer');
     $renderer = \Drupal::service('renderer');
 
-    $expected = array(
+    $expected = [
       'setting_name' => 'ajax_forms_test_lazy_load_form_submit',
       'setting_value' => 'executed',
       'library_1' => 'system/admin',
       'library_2' => 'system/drupal.system',
-    );
+    ];
 
     // Get the base page.
     $this->drupalGet('ajax_forms_test_lazy_load_form');
@@ -109,9 +109,9 @@ public function testLazyLoad() {
 
     // Verify that the base page doesn't have the settings and files that are to
     // be lazy loaded as part of the next requests.
-    $this->assertTrue(!isset($original_settings[$expected['setting_name']]), format_string('Page originally lacks the %setting, as expected.', array('%setting' => $expected['setting_name'])));
-    $this->assertTrue(!in_array($expected['library_1'], $original_libraries), format_string('Page originally lacks the %library library, as expected.', array('%library' => $expected['library_1'])));
-    $this->assertTrue(!in_array($expected['library_2'], $original_libraries), format_string('Page originally lacks the %library library, as expected.', array('%library' => $expected['library_2'])));
+    $this->assertTrue(!isset($original_settings[$expected['setting_name']]), format_string('Page originally lacks the %setting, as expected.', ['%setting' => $expected['setting_name']]));
+    $this->assertTrue(!in_array($expected['library_1'], $original_libraries), format_string('Page originally lacks the %library library, as expected.', ['%library' => $expected['library_1']]));
+    $this->assertTrue(!in_array($expected['library_2'], $original_libraries), format_string('Page originally lacks the %library library, as expected.', ['%library' => $expected['library_2']]));
 
     // Calculate the expected CSS and JS.
     $assets = new AttachedAssets();
@@ -128,14 +128,14 @@ public function testLazyLoad() {
     $expected_js_html = $renderer->renderRoot($js_render_array);
 
     // Submit the AJAX request without triggering files getting added.
-    $commands = $this->drupalPostAjaxForm(NULL, array('add_files' => FALSE), array('op' => t('Submit')));
+    $commands = $this->drupalPostAjaxForm(NULL, ['add_files' => FALSE], ['op' => t('Submit')]);
     $new_settings = $this->getDrupalSettings();
     $new_libraries = explode(',', $new_settings['ajaxPageState']['libraries']);
 
     // Verify the setting was not added when not expected.
-    $this->assertTrue(!isset($new_settings[$expected['setting_name']]), format_string('Page still lacks the %setting, as expected.', array('%setting' => $expected['setting_name'])));
-    $this->assertTrue(!in_array($expected['library_1'], $new_libraries), format_string('Page still lacks the %library library, as expected.', array('%library' => $expected['library_1'])));
-    $this->assertTrue(!in_array($expected['library_2'], $new_libraries), format_string('Page still lacks the %library library, as expected.', array('%library' => $expected['library_2'])));
+    $this->assertTrue(!isset($new_settings[$expected['setting_name']]), format_string('Page still lacks the %setting, as expected.', ['%setting' => $expected['setting_name']]));
+    $this->assertTrue(!in_array($expected['library_1'], $new_libraries), format_string('Page still lacks the %library library, as expected.', ['%library' => $expected['library_1']]));
+    $this->assertTrue(!in_array($expected['library_2'], $new_libraries), format_string('Page still lacks the %library library, as expected.', ['%library' => $expected['library_2']]));
     // Verify a settings command does not add CSS or scripts to drupalSettings
     // and no command inserts the corresponding tags on the page.
     $found_settings_command = FALSE;
@@ -148,24 +148,24 @@ public function testLazyLoad() {
         $found_markup_command = TRUE;
       }
     }
-    $this->assertFalse($found_settings_command, format_string('Page state still lacks the %library_1 and %library_2 libraries, as expected.', array('%library_1' => $expected['library_1'], '%library_2' => $expected['library_2'])));
-    $this->assertFalse($found_markup_command, format_string('Page still lacks the %library_1 and %library_2 libraries, as expected.', array('%library_1' => $expected['library_1'], '%library_2' => $expected['library_2'])));
+    $this->assertFalse($found_settings_command, format_string('Page state still lacks the %library_1 and %library_2 libraries, as expected.', ['%library_1' => $expected['library_1'], '%library_2' => $expected['library_2']]));
+    $this->assertFalse($found_markup_command, format_string('Page still lacks the %library_1 and %library_2 libraries, as expected.', ['%library_1' => $expected['library_1'], '%library_2' => $expected['library_2']]));
 
     // Submit the AJAX request and trigger adding files.
-    $commands = $this->drupalPostAjaxForm(NULL, array('add_files' => TRUE), array('op' => t('Submit')));
+    $commands = $this->drupalPostAjaxForm(NULL, ['add_files' => TRUE], ['op' => t('Submit')]);
     $new_settings = $this->getDrupalSettings();
     $new_libraries = explode(',', $new_settings['ajaxPageState']['libraries']);
 
     // Verify the expected setting was added, both to drupalSettings, and as
     // the first AJAX command.
-    $this->assertIdentical($new_settings[$expected['setting_name']], $expected['setting_value'], format_string('Page now has the %setting.', array('%setting' => $expected['setting_name'])));
-    $expected_command = new SettingsCommand(array($expected['setting_name'] => $expected['setting_value']), TRUE);
+    $this->assertIdentical($new_settings[$expected['setting_name']], $expected['setting_value'], format_string('Page now has the %setting.', ['%setting' => $expected['setting_name']]));
+    $expected_command = new SettingsCommand([$expected['setting_name'] => $expected['setting_value']], TRUE);
     $this->assertCommand(array_slice($commands, 0, 1), $expected_command->render(), 'The settings command was first.');
 
     // Verify the expected CSS file was added, both to drupalSettings, and as
     // the second AJAX command for inclusion into the HTML.
-    $this->assertTrue(in_array($expected['library_1'], $new_libraries), format_string('Page state now has the %library library.', array('%library' => $expected['library_1'])));
-    $this->assertCommand(array_slice($commands, 1, 1), array('data' => $expected_css_html), format_string('Page now has the %library library.', array('%library' => $expected['library_1'])));
+    $this->assertTrue(in_array($expected['library_1'], $new_libraries), format_string('Page state now has the %library library.', ['%library' => $expected['library_1']]));
+    $this->assertCommand(array_slice($commands, 1, 1), ['data' => $expected_css_html], format_string('Page now has the %library library.', ['%library' => $expected['library_1']]));
 
     // Verify the expected JS file was added, both to drupalSettings, and as
     // the third AJAX command for inclusion into the HTML. By testing for an
@@ -173,15 +173,15 @@ public function testLazyLoad() {
     // unexpected JavaScript code, such as a jQuery.extend() that would
     // potentially clobber rather than properly merge settings, didn't
     // accidentally get added.
-    $this->assertTrue(in_array($expected['library_2'], $new_libraries), format_string('Page state now has the %library library.', array('%library' => $expected['library_2'])));
-    $this->assertCommand(array_slice($commands, 2, 1), array('data' => $expected_js_html), format_string('Page now has the %library library.', array('%library' => $expected['library_2'])));
+    $this->assertTrue(in_array($expected['library_2'], $new_libraries), format_string('Page state now has the %library library.', ['%library' => $expected['library_2']]));
+    $this->assertCommand(array_slice($commands, 2, 1), ['data' => $expected_js_html], format_string('Page now has the %library library.', ['%library' => $expected['library_2']]));
   }
 
   /**
    * Tests that drupalSettings.currentPath is not updated on AJAX requests.
    */
   public function testCurrentPathChange() {
-    $commands = $this->drupalPostAjaxForm('ajax_forms_test_lazy_load_form', array('add_files' => FALSE), array('op' => t('Submit')));
+    $commands = $this->drupalPostAjaxForm('ajax_forms_test_lazy_load_form', ['add_files' => FALSE], ['op' => t('Submit')]);
     foreach ($commands as $command) {
       if ($command['command'] == 'settings') {
         $this->assertFalse(isset($command['settings']['currentPath']), 'Value of drupalSettings.currentPath is not updated after an AJAX request.');
@@ -195,14 +195,14 @@ public function testCurrentPathChange() {
   public function testLazyLoadOverriddenCSS() {
     // The test theme overrides js.module.css without an implementation,
     // thereby removing it.
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
     $this->config('system.theme')
       ->set('default', 'test_theme')
       ->save();
 
     // This gets the form, and emulates an Ajax submission on it, including
     // adding markup to the HEAD and BODY for any lazy loaded JS/CSS files.
-    $this->drupalPostAjaxForm('ajax_forms_test_lazy_load_form', array('add_files' => TRUE), array('op' => t('Submit')));
+    $this->drupalPostAjaxForm('ajax_forms_test_lazy_load_form', ['add_files' => TRUE], ['op' => t('Submit')]);
 
     // Verify that the resulting HTML does not load the overridden CSS file.
     // We add a "?" to the assertion, because drupalSettings may include
diff --git a/core/modules/system/src/Tests/Ajax/MultiFormTest.php b/core/modules/system/src/Tests/Ajax/MultiFormTest.php
index e07204cc7fde586e70c209ecbcbcf328da58ee28..59f60bf5719eaaaf0412f6ec002e169a4d0a8c47 100644
--- a/core/modules/system/src/Tests/Ajax/MultiFormTest.php
+++ b/core/modules/system/src/Tests/Ajax/MultiFormTest.php
@@ -19,32 +19,32 @@ class MultiFormTest extends AjaxTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Page']);
 
     // Create a multi-valued field for 'page' nodes to use for Ajax testing.
     $field_name = 'field_ajax_test';
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'node',
       'field_name' => $field_name,
       'type' => 'text',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'bundle' => 'page',
     ])->save();
     entity_get_form_display('node', 'page', 'default')
-      ->setComponent($field_name, array('type' => 'text_textfield'))
+      ->setComponent($field_name, ['type' => 'text_textfield'])
       ->save();
 
     // Log in a user who can create 'page' nodes.
-    $this->drupalLogin ($this->drupalCreateUser(array('create page content')));
+    $this->drupalLogin ($this->drupalCreateUser(['create page content']));
   }
 
   /**
@@ -84,7 +84,7 @@ function testMultiForm() {
       $forms = $this->xpath($form_xpath);
       foreach ($forms as $offset => $form) {
         $form_html_id = (string) $form['id'];
-        $this->drupalPostAjaxForm(NULL, array(), array($button_name => $button_value), NULL, array(), array(), $form_html_id);
+        $this->drupalPostAjaxForm(NULL, [], [$button_name => $button_value], NULL, [], [], $form_html_id);
         $form = $this->xpath($form_xpath)[$offset];
         $field = $form->xpath('.' . $field_xpath);
 
diff --git a/core/modules/system/src/Tests/Batch/PageTest.php b/core/modules/system/src/Tests/Batch/PageTest.php
index f9948ed5e3c59cbba427a6ec10f949ba081e875d..0f24c0fd8074ac80a742a38277aa88b54ab6a42f 100644
--- a/core/modules/system/src/Tests/Batch/PageTest.php
+++ b/core/modules/system/src/Tests/Batch/PageTest.php
@@ -16,7 +16,7 @@ class PageTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('batch_test');
+  public static $modules = ['batch_test'];
 
   /**
    * Tests that the batch API progress page uses the correct theme.
@@ -24,14 +24,14 @@ class PageTest extends WebTestBase {
   function testBatchProgressPageTheme() {
     // Make sure that the page which starts the batch (an administrative page)
     // is using a different theme than would normally be used by the batch API.
-    $this->container->get('theme_handler')->install(array('seven', 'bartik'));
+    $this->container->get('theme_handler')->install(['seven', 'bartik']);
     $this->config('system.theme')
       ->set('default', 'bartik')
       ->set('admin', 'seven')
       ->save();
 
     // Log in as an administrator who can see the administrative theme.
-    $admin_user = $this->drupalCreateUser(array('view the administration theme'));
+    $admin_user = $this->drupalCreateUser(['view the administration theme']);
     $this->drupalLogin($admin_user);
     // Visit an administrative page that runs a test batch, and check that the
     // theme that was used during batch execution (which the batch callback
@@ -40,7 +40,7 @@ function testBatchProgressPageTheme() {
     $this->drupalGet('admin/batch-test/test-theme');
     // The stack should contain the name of the theme used on the progress
     // page.
-    $this->assertEqual(batch_test_stack(), array('seven'), 'A progressive batch correctly uses the theme of the page that started the batch.');
+    $this->assertEqual(batch_test_stack(), ['seven'], 'A progressive batch correctly uses the theme of the page that started the batch.');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Batch/ProcessingTest.php b/core/modules/system/src/Tests/Batch/ProcessingTest.php
index fcdb98cc863f3564eff2613310b72a551eb39b1b..53557ed7a8246fc279096c54e8f98a7f9ea9884f 100644
--- a/core/modules/system/src/Tests/Batch/ProcessingTest.php
+++ b/core/modules/system/src/Tests/Batch/ProcessingTest.php
@@ -17,7 +17,7 @@ class ProcessingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('batch_test', 'test_page_test');
+  public static $modules = ['batch_test', 'test_page_test'];
 
   /**
    * Tests batches triggered outside of form submission.
@@ -47,14 +47,14 @@ function testBatchRedirectFinishedCallback() {
    */
   function testBatchForm() {
     // Batch 0: no operation.
-    $edit = array('batch' => 'batch_0');
+    $edit = ['batch' => 'batch_0'];
     $this->drupalPostForm('batch-test', $edit, 'Submit');
     $this->assertNoEscaped('<', 'No escaped markup is present.');
     $this->assertBatchMessages($this->_resultMessages('batch_0'), 'Batch with no operation performed successfully.');
     $this->assertText('Redirection successful.', 'Redirection after batch execution is correct.');
 
     // Batch 1: several simple operations.
-    $edit = array('batch' => 'batch_1');
+    $edit = ['batch' => 'batch_1'];
     $this->drupalPostForm('batch-test', $edit, 'Submit');
     $this->assertNoEscaped('<', 'No escaped markup is present.');
     $this->assertBatchMessages($this->_resultMessages('batch_1'), 'Batch with simple operations performed successfully.');
@@ -62,7 +62,7 @@ function testBatchForm() {
     $this->assertText('Redirection successful.', 'Redirection after batch execution is correct.');
 
     // Batch 2: one multistep operation.
-    $edit = array('batch' => 'batch_2');
+    $edit = ['batch' => 'batch_2'];
     $this->drupalPostForm('batch-test', $edit, 'Submit');
     $this->assertNoEscaped('<', 'No escaped markup is present.');
     $this->assertBatchMessages($this->_resultMessages('batch_2'), 'Batch with multistep operation performed successfully.');
@@ -70,7 +70,7 @@ function testBatchForm() {
     $this->assertText('Redirection successful.', 'Redirection after batch execution is correct.');
 
     // Batch 3: simple + multistep combined.
-    $edit = array('batch' => 'batch_3');
+    $edit = ['batch' => 'batch_3'];
     $this->drupalPostForm('batch-test', $edit, 'Submit');
     $this->assertNoEscaped('<', 'No escaped markup is present.');
     $this->assertBatchMessages($this->_resultMessages('batch_3'), 'Batch with simple and multistep operations performed successfully.');
@@ -78,7 +78,7 @@ function testBatchForm() {
     $this->assertText('Redirection successful.', 'Redirection after batch execution is correct.');
 
     // Batch 4: nested batch.
-    $edit = array('batch' => 'batch_4');
+    $edit = ['batch' => 'batch_4'];
     $this->drupalPostForm('batch-test', $edit, 'Submit');
     $this->assertNoEscaped('<', 'No escaped markup is present.');
     $this->assertBatchMessages($this->_resultMessages('batch_4'), 'Nested batch performed successfully.');
@@ -95,14 +95,14 @@ function testBatchFormMultistep() {
     $this->assertText('step 1', 'Form is displayed in step 1.');
 
     // First step triggers batch 1.
-    $this->drupalPostForm(NULL, array(), 'Submit');
+    $this->drupalPostForm(NULL, [], 'Submit');
     $this->assertBatchMessages($this->_resultMessages('batch_1'), 'Batch for step 1 performed successfully.');
     $this->assertEqual(batch_test_stack(), $this->_resultStack('batch_1'), 'Execution order was correct.');
     $this->assertText('step 2', 'Form is displayed in step 2.');
     $this->assertNoEscaped('<', 'No escaped markup is present.');
 
     // Second step triggers batch 2.
-    $this->drupalPostForm(NULL, array(), 'Submit');
+    $this->drupalPostForm(NULL, [], 'Submit');
     $this->assertBatchMessages($this->_resultMessages('batch_2'), 'Batch for step 2 performed successfully.');
     $this->assertEqual(batch_test_stack(), $this->_resultStack('batch_2'), 'Execution order was correct.');
     $this->assertText('Redirection successful.', 'Redirection after batch execution is correct.');
@@ -111,7 +111,7 @@ function testBatchFormMultistep() {
     // Extra query arguments will trigger logic that will add them to the
     // redirect URL. Make sure they are persisted.
     $this->drupalGet('batch-test/multistep', ['query' => ['big_tree' => 'small_axe']]);
-    $this->drupalPostForm(NULL, array(), 'Submit');
+    $this->drupalPostForm(NULL, [], 'Submit');
     $this->assertText('step 2', 'Form is displayed in step 2.');
     $this->assertTrue(strpos($this->getUrl(), 'batch-test/multistep?big_tree=small_axe'), 'Query argument was persisted and another extra argument was added.');
   }
@@ -123,7 +123,7 @@ function testBatchFormMultipleBatches() {
     // Batches 1, 2 and 3 are triggered in sequence by different submit
     // handlers. Each submit handler modify the submitted 'value'.
     $value = rand(0, 255);
-    $edit = array('value' => $value);
+    $edit = ['value' => $value];
     $this->drupalPostForm('batch-test/chained', $edit, 'Submit');
     // Check that result messages are present and in the correct order.
     $this->assertBatchMessages($this->_resultMessages('chained'), 'Batches defined in separate submit handlers performed successfully.');
@@ -159,7 +159,7 @@ function testDrupalFormSubmitInBatch() {
     // form.
     $value = rand(0, 255);
     $this->drupalGet('batch-test/nested-programmatic/' . $value);
-    $this->assertEqual(batch_test_stack(), array('mock form submitted with value = ' . $value), '\Drupal::formBuilder()->submitForm() ran successfully within a batch operation.');
+    $this->assertEqual(batch_test_stack(), ['mock form submitted with value = ' . $value], '\Drupal::formBuilder()->submitForm() ran successfully within a batch operation.');
   }
 
   /**
@@ -196,7 +196,7 @@ function assertBatchMessages($texts, $message) {
    * Returns expected execution stacks for the test batches.
    */
   function _resultStack($id, $value = 0) {
-    $stack = array();
+    $stack = [];
     switch ($id) {
       case 'batch_1':
         for ($i = 1; $i <= 10; $i++) {
@@ -263,7 +263,7 @@ function _resultStack($id, $value = 0) {
    * Returns expected result messages for the test batches.
    */
   function _resultMessages($id) {
-    $messages = array();
+    $messages = [];
 
     switch ($id) {
       case 'batch_0':
diff --git a/core/modules/system/src/Tests/Cache/AssertPageCacheContextsAndTagsTrait.php b/core/modules/system/src/Tests/Cache/AssertPageCacheContextsAndTagsTrait.php
index c216e9bcfd5306111931650e0936288102951171..6bea791e910b9f0640ae9cec52aa5b306ff5882a 100644
--- a/core/modules/system/src/Tests/Cache/AssertPageCacheContextsAndTagsTrait.php
+++ b/core/modules/system/src/Tests/Cache/AssertPageCacheContextsAndTagsTrait.php
@@ -89,7 +89,7 @@ protected function assertPageCacheContextsAndTags(Url $url, array $expected_cont
     $this->assertCacheContexts($expected_contexts);
 
     // Assert page cache item + expected cache tags.
-    $cid_parts = array($url->setAbsolute()->toString(), 'html');
+    $cid_parts = [$url->setAbsolute()->toString(), 'html'];
     $cid = implode(':', $cid_parts);
     $cache_entry = \Drupal::cache('render')->get($cid);
     sort($cache_entry->tags);
diff --git a/core/modules/system/src/Tests/Cache/GenericCacheBackendUnitTestBase.php b/core/modules/system/src/Tests/Cache/GenericCacheBackendUnitTestBase.php
index 6c3d98f7138f4326fc26ce8f65d9225038f2e862..c30ceffa91efda325aeaf7f9d29df1f01c692f6c 100644
--- a/core/modules/system/src/Tests/Cache/GenericCacheBackendUnitTestBase.php
+++ b/core/modules/system/src/Tests/Cache/GenericCacheBackendUnitTestBase.php
@@ -105,7 +105,7 @@ protected function getCacheBackend($bin = NULL) {
   }
 
   protected function setUp() {
-    $this->cachebackends = array();
+    $this->cachebackends = [];
     $this->defaultValue = $this->randomMachineName(10);
 
     parent::setUp();
@@ -134,7 +134,7 @@ public function testSetGet() {
     $backend = $this->getCacheBackend();
 
     $this->assertIdentical(FALSE, $backend->get('test1'), "Backend does not contain data for cache id test1.");
-    $with_backslash = array('foo' => '\Drupal\foo\Bar');
+    $with_backslash = ['foo' => '\Drupal\foo\Bar'];
     $backend->set('test1', $with_backslash);
     $cached = $backend->get('test1');
     $this->assert(is_object($cached), "Backend returned an object for cache id test1.");
@@ -145,10 +145,10 @@ public function testSetGet() {
     $this->assertEqual($cached->expire, Cache::PERMANENT, 'Expire time is correct.');
 
     $this->assertIdentical(FALSE, $backend->get('test2'), "Backend does not contain data for cache id test2.");
-    $backend->set('test2', array('value' => 3), REQUEST_TIME + 3);
+    $backend->set('test2', ['value' => 3], REQUEST_TIME + 3);
     $cached = $backend->get('test2');
     $this->assert(is_object($cached), "Backend returned an object for cache id test2.");
-    $this->assertIdentical(array('value' => 3), $cached->data);
+    $this->assertIdentical(['value' => 3], $cached->data);
     $this->assertTrue($cached->valid, 'Item is marked as valid.');
     $this->assertTrue($cached->created >= REQUEST_TIME && $cached->created <= round(microtime(TRUE), 3), 'Created time is correct.');
     $this->assertEqual($cached->expire, REQUEST_TIME + 3, 'Expire time is correct.');
@@ -162,7 +162,7 @@ public function testSetGet() {
     $this->assertEqual($cached->expire, REQUEST_TIME - 3, 'Expire time is correct.');
 
     $this->assertIdentical(FALSE, $backend->get('test4'), "Backend does not contain data for cache id test4.");
-    $with_eof = array('foo' => "\nEOF\ndata");
+    $with_eof = ['foo' => "\nEOF\ndata"];
     $backend->set('test4', $with_eof);
     $cached = $backend->get('test4');
     $this->assert(is_object($cached), "Backend returned an object for cache id test4.");
@@ -172,7 +172,7 @@ public function testSetGet() {
     $this->assertEqual($cached->expire, Cache::PERMANENT, 'Expire time is correct.');
 
     $this->assertIdentical(FALSE, $backend->get('test5'), "Backend does not contain data for cache id test5.");
-    $with_eof_and_semicolon = array('foo' => "\nEOF;\ndata");
+    $with_eof_and_semicolon = ['foo' => "\nEOF;\ndata"];
     $backend->set('test5', $with_eof_and_semicolon);
     $cached = $backend->get('test5');
     $this->assert(is_object($cached), "Backend returned an object for cache id test5.");
@@ -181,7 +181,7 @@ public function testSetGet() {
     $this->assertTrue($cached->created >= REQUEST_TIME && $cached->created <= round(microtime(TRUE), 3), 'Created time is correct.');
     $this->assertEqual($cached->expire, Cache::PERMANENT, 'Expire time is correct.');
 
-    $with_variable = array('foo' => '$bar');
+    $with_variable = ['foo' => '$bar'];
     $backend->set('test6', $with_variable);
     $cached = $backend->get('test6');
     $this->assert(is_object($cached), "Backend returned an object for cache id test6.");
@@ -260,14 +260,14 @@ public function testDelete() {
   public function testValueTypeIsKept() {
     $backend = $this->getCacheBackend();
 
-    $variables = array(
+    $variables = [
       'test1' => 1,
       'test2' => '0',
       'test3' => '',
       'test4' => 12.64,
       'test5' => FALSE,
-      'test6' => array(1, 2, 3),
-    );
+      'test6' => [1, 2, 3],
+    ];
 
     // Create cache entries.
     foreach ($variables as $cid => $data) {
@@ -300,14 +300,14 @@ public function testGetMultiple() {
     $backend->set($long_cid, 300);
 
     // Mismatch order for harder testing.
-    $reference = array(
+    $reference = [
       'test3',
       'test7',
       'test21', // Cid does not exist.
       'test6',
       'test19', // Cid does not exist until added before second getMultiple().
       'test2',
-    );
+    ];
 
     $cids = $reference;
     $ret = $backend->getMultiple($cids);
@@ -367,7 +367,7 @@ public function testGetMultiple() {
     $this->assertFalse(in_array('test19', $cids), "Added cache id test19 is not in cids array.");
 
     // Test with a long $cid and non-numeric array key.
-    $cids = array('key:key' => $long_cid);
+    $cids = ['key:key' => $long_cid];
     $return = $backend->getMultiple($cids);
     $this->assertEqual(300, $return[$long_cid]->data);
     $this->assertTrue(empty($cids));
@@ -383,13 +383,13 @@ public function testSetMultiple() {
 
     // Set multiple testing keys.
     $backend->set('cid_1', 'Some other value');
-    $items = array(
-      'cid_1' => array('data' => 1),
-      'cid_2' => array('data' => 2),
-      'cid_3' => array('data' => array(1, 2)),
-      'cid_4' => array('data' => 1, 'expire' => $future_expiration),
-      'cid_5' => array('data' => 1, 'tags' => array('test:a', 'test:b')),
-    );
+    $items = [
+      'cid_1' => ['data' => 1],
+      'cid_2' => ['data' => 2],
+      'cid_3' => ['data' => [1, 2]],
+      'cid_4' => ['data' => 1, 'expire' => $future_expiration],
+      'cid_5' => ['data' => 1, 'tags' => ['test:a', 'test:b']],
+    ];
     $backend->setMultiple($items);
     $cids = array_keys($items);
     $cached = $backend->getMultiple($cids);
@@ -414,9 +414,9 @@ public function testSetMultiple() {
     // assertion.
     try {
       $items = [
-        'exception_test_1' => array('data' => 1, 'tags' => []),
-        'exception_test_2' => array('data' => 2, 'tags' => ['valid']),
-        'exception_test_3' => array('data' => 3, 'tags' => ['node' => [3, 5, 7]]),
+        'exception_test_1' => ['data' => 1, 'tags' => []],
+        'exception_test_2' => ['data' => 2, 'tags' => ['valid']],
+        'exception_test_3' => ['data' => 3, 'tags' => ['node' => [3, 5, 7]]],
       ];
       $backend->setMultiple($items);
       $this->fail('::setMultiple() was called with invalid cache tags, runtime assertion did not fail.');
@@ -444,13 +444,13 @@ public function testDeleteMultiple() {
 
     $backend->delete('test1');
     $backend->delete('test23'); // Nonexistent key should not cause an error.
-    $backend->deleteMultiple(array(
+    $backend->deleteMultiple([
       'test3',
       'test5',
       'test7',
       'test19', // Nonexistent key should not cause an error.
       'test21', // Nonexistent key should not cause an error.
-    ));
+    ]);
 
     // Test if expected keys have been deleted.
     $this->assertIdentical(FALSE, $backend->get('test1'), "Cache id test1 deleted.");
@@ -468,7 +468,7 @@ public function testDeleteMultiple() {
     $this->assertIdentical(FALSE, $backend->get('test21'), "Cache id test21 does not exist.");
 
     // Calling deleteMultiple() with an empty array should not cause an error.
-    $this->assertFalse($backend->deleteMultiple(array()));
+    $this->assertFalse($backend->deleteMultiple([]));
   }
 
   /**
@@ -501,14 +501,14 @@ function testInvalidate() {
     $backend->set('test3', 2);
     $backend->set('test4', 2);
 
-    $reference = array('test1', 'test2', 'test3', 'test4');
+    $reference = ['test1', 'test2', 'test3', 'test4'];
 
     $cids = $reference;
     $ret = $backend->getMultiple($cids);
     $this->assertEqual(count($ret), 4, 'Four items returned.');
 
     $backend->invalidate('test1');
-    $backend->invalidateMultiple(array('test2', 'test3'));
+    $backend->invalidateMultiple(['test2', 'test3']);
 
     $cids = $reference;
     $ret = $backend->getMultiple($cids);
@@ -520,7 +520,7 @@ function testInvalidate() {
 
     // Calling invalidateMultiple() with an empty array should not cause an
     // error.
-    $this->assertFalse($backend->invalidateMultiple(array()));
+    $this->assertFalse($backend->invalidateMultiple([]));
   }
 
   /**
@@ -530,45 +530,45 @@ function testInvalidateTags() {
     $backend = $this->getCacheBackend();
 
     // Create two cache entries with the same tag and tag value.
-    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, array('test_tag:2'));
-    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, array('test_tag:2'));
+    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, ['test_tag:2']);
+    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, ['test_tag:2']);
     $this->assertTrue($backend->get('test_cid_invalidate1') && $backend->get('test_cid_invalidate2'), 'Two cache items were created.');
 
     // Invalidate test_tag of value 1. This should invalidate both entries.
-    Cache::invalidateTags(array('test_tag:2'));
+    Cache::invalidateTags(['test_tag:2']);
     $this->assertFalse($backend->get('test_cid_invalidate1') || $backend->get('test_cid_invalidate2'), 'Two cache items invalidated after invalidating a cache tag.');
     $this->assertTrue($backend->get('test_cid_invalidate1', TRUE) && $backend->get('test_cid_invalidate2', TRUE), 'Cache items not deleted after invalidating a cache tag.');
 
     // Create two cache entries with the same tag and an array tag value.
-    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, array('test_tag:1'));
-    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, array('test_tag:1'));
+    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, ['test_tag:1']);
+    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, ['test_tag:1']);
     $this->assertTrue($backend->get('test_cid_invalidate1') && $backend->get('test_cid_invalidate2'), 'Two cache items were created.');
 
     // Invalidate test_tag of value 1. This should invalidate both entries.
-    Cache::invalidateTags(array('test_tag:1'));
+    Cache::invalidateTags(['test_tag:1']);
     $this->assertFalse($backend->get('test_cid_invalidate1') || $backend->get('test_cid_invalidate2'), 'Two caches removed after invalidating a cache tag.');
     $this->assertTrue($backend->get('test_cid_invalidate1', TRUE) && $backend->get('test_cid_invalidate2', TRUE), 'Cache items not deleted after invalidating a cache tag.');
 
     // Create three cache entries with a mix of tags and tag values.
-    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, array('test_tag:1'));
-    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, array('test_tag:2'));
-    $backend->set('test_cid_invalidate3', $this->defaultValue, Cache::PERMANENT, array('test_tag_foo:3'));
+    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, ['test_tag:1']);
+    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, ['test_tag:2']);
+    $backend->set('test_cid_invalidate3', $this->defaultValue, Cache::PERMANENT, ['test_tag_foo:3']);
     $this->assertTrue($backend->get('test_cid_invalidate1') && $backend->get('test_cid_invalidate2') && $backend->get('test_cid_invalidate3'), 'Three cached items were created.');
-    Cache::invalidateTags(array('test_tag_foo:3'));
+    Cache::invalidateTags(['test_tag_foo:3']);
     $this->assertTrue($backend->get('test_cid_invalidate1') && $backend->get('test_cid_invalidate2'), 'Cache items not matching the tag were not invalidated.');
     $this->assertFalse($backend->get('test_cid_invalidated3'), 'Cached item matching the tag was removed.');
 
     // Create cache entry in multiple bins. Two cache entries
     // (test_cid_invalidate1 and test_cid_invalidate2) still exist from previous
     // tests.
-    $tags = array('test_tag:1', 'test_tag:2', 'test_tag:3');
-    $bins = array('path', 'bootstrap', 'page');
+    $tags = ['test_tag:1', 'test_tag:2', 'test_tag:3'];
+    $bins = ['path', 'bootstrap', 'page'];
     foreach ($bins as $bin) {
       $this->getCacheBackend($bin)->set('test', $this->defaultValue, Cache::PERMANENT, $tags);
       $this->assertTrue($this->getCacheBackend($bin)->get('test'), 'Cache item was set in bin.');
     }
 
-    Cache::invalidateTags(array('test_tag:2'));
+    Cache::invalidateTags(['test_tag:2']);
 
     // Test that the cache entry has been invalidated in multiple bins.
     foreach ($bins as $bin) {
diff --git a/core/modules/system/src/Tests/Cache/PageCacheTagsTestBase.php b/core/modules/system/src/Tests/Cache/PageCacheTagsTestBase.php
index fcfb02380f272422d1fa6a7cee845e441f180b8b..582a2f4f067b3ea574fc6933c1e0565f1300815d 100644
--- a/core/modules/system/src/Tests/Cache/PageCacheTagsTestBase.php
+++ b/core/modules/system/src/Tests/Cache/PageCacheTagsTestBase.php
@@ -47,12 +47,12 @@ protected function setUp() {
    */
   protected function verifyPageCache(Url $url, $hit_or_miss, $tags = FALSE) {
     $this->drupalGet($url);
-    $message = SafeMarkup::format('Page cache @hit_or_miss for %path.', array('@hit_or_miss' => $hit_or_miss, '%path' => $url->toString()));
+    $message = SafeMarkup::format('Page cache @hit_or_miss for %path.', ['@hit_or_miss' => $hit_or_miss, '%path' => $url->toString()]);
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), $hit_or_miss, $message);
 
     if ($hit_or_miss === 'HIT' && is_array($tags)) {
       $absolute_url = $url->setAbsolute()->toString();
-      $cid_parts = array($absolute_url, 'html');
+      $cid_parts = [$absolute_url, 'html'];
       $cid = implode(':', $cid_parts);
       $cache_entry = \Drupal::cache('render')->get($cid);
       sort($cache_entry->tags);
diff --git a/core/modules/system/src/Tests/Common/AddFeedTest.php b/core/modules/system/src/Tests/Common/AddFeedTest.php
index b539281629ba86739c432cb8ed8498542c1f2bf6..b959d42524dcc2810baaef816cfd6515a96a3d29 100644
--- a/core/modules/system/src/Tests/Common/AddFeedTest.php
+++ b/core/modules/system/src/Tests/Common/AddFeedTest.php
@@ -18,38 +18,38 @@ class AddFeedTest extends WebTestBase {
   function testBasicFeedAddNoTitle() {
     $path = $this->randomMachineName(12);
     $external_url = 'http://' . $this->randomMachineName(12) . '/' . $this->randomMachineName(12);
-    $fully_qualified_local_url = Url::fromUri('base:' . $this->randomMachineName(12), array('absolute' => TRUE))->toString();
+    $fully_qualified_local_url = Url::fromUri('base:' . $this->randomMachineName(12), ['absolute' => TRUE])->toString();
 
     $path_for_title = $this->randomMachineName(12);
     $external_for_title = 'http://' . $this->randomMachineName(12) . '/' . $this->randomMachineName(12);
-    $fully_qualified_for_title = Url::fromUri('base:' . $this->randomMachineName(12), array('absolute' => TRUE))->toString();
+    $fully_qualified_for_title = Url::fromUri('base:' . $this->randomMachineName(12), ['absolute' => TRUE])->toString();
 
-    $urls = array(
-      'path without title' => array(
-        'url' => Url::fromUri('base:' . $path, array('absolute' => TRUE))->toString(),
+    $urls = [
+      'path without title' => [
+        'url' => Url::fromUri('base:' . $path, ['absolute' => TRUE])->toString(),
         'title' => '',
-      ),
-      'external URL without title' => array(
+      ],
+      'external URL without title' => [
         'url' => $external_url,
         'title' => '',
-      ),
-      'local URL without title' => array(
+      ],
+      'local URL without title' => [
         'url' => $fully_qualified_local_url,
         'title' => '',
-      ),
-      'path with title' => array(
-        'url' => Url::fromUri('base:' . $path_for_title, array('absolute' => TRUE))->toString(),
+      ],
+      'path with title' => [
+        'url' => Url::fromUri('base:' . $path_for_title, ['absolute' => TRUE])->toString(),
         'title' => $this->randomMachineName(12),
-      ),
-      'external URL with title' => array(
+      ],
+      'external URL with title' => [
         'url' => $external_for_title,
         'title' => $this->randomMachineName(12),
-      ),
-      'local URL with title' => array(
+      ],
+      'local URL with title' => [
         'url' => $fully_qualified_for_title,
         'title' => $this->randomMachineName(12),
-      ),
-    );
+      ],
+    ];
 
     $build = [];
     foreach ($urls as $feed_info) {
@@ -63,7 +63,7 @@ function testBasicFeedAddNoTitle() {
     $this->setRawContent($response->getContent());
     // Assert that the content contains the RSS links we specified.
     foreach ($urls as $description => $feed_info) {
-      $this->assertPattern($this->urlToRSSLinkPattern($feed_info['url'], $feed_info['title']), format_string('Found correct feed header for %description', array('%description' => $description)));
+      $this->assertPattern($this->urlToRSSLinkPattern($feed_info['url'], $feed_info['title']), format_string('Found correct feed header for %description', ['%description' => $description]));
     }
   }
 
@@ -83,11 +83,11 @@ function urlToRSSLinkPattern($url, $title = '') {
    * @see https://www.drupal.org/node/1211668
    */
   function testFeedIconEscaping() {
-    $variables = array(
+    $variables = [
       '#theme' => 'feed_icon',
       '#url' => 'node',
       '#title' => '<>&"\'',
-    );
+    ];
     $text = \Drupal::service('renderer')->renderRoot($variables);
     $this->assertEqual(trim(strip_tags($text)), 'Subscribe to &lt;&gt;&amp;&quot;&#039;', 'feed_icon template escapes reserved HTML characters.');
   }
diff --git a/core/modules/system/src/Tests/Common/AlterTest.php b/core/modules/system/src/Tests/Common/AlterTest.php
index 86bed7d24a2e55e3612ae0bbe811b2f35d1b392c..2f19ab298f5422254fb7de8ccea5b8ea0593f3a8 100644
--- a/core/modules/system/src/Tests/Common/AlterTest.php
+++ b/core/modules/system/src/Tests/Common/AlterTest.php
@@ -16,7 +16,7 @@ class AlterTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'common_test');
+  public static $modules = ['block', 'common_test'];
 
   /**
    * Tests if the theme has been altered.
@@ -24,16 +24,16 @@ class AlterTest extends WebTestBase {
   function testDrupalAlter() {
     // This test depends on Bartik, so make sure that it is always the current
     // active theme.
-    \Drupal::service('theme_handler')->install(array('bartik'));
+    \Drupal::service('theme_handler')->install(['bartik']);
     \Drupal::theme()->setActiveTheme(\Drupal::service('theme.initialization')->initTheme('bartik'));
 
-    $array = array('foo' => 'bar');
+    $array = ['foo' => 'bar'];
     $entity = new \stdClass();
     $entity->foo = 'bar';
 
     // Verify alteration of a single argument.
     $array_copy = $array;
-    $array_expected = array('foo' => 'Drupal theme');
+    $array_expected = ['foo' => 'Drupal theme'];
     \Drupal::moduleHandler()->alter('drupal_alter', $array_copy);
     \Drupal::theme()->alter('drupal_alter', $array_copy);
     $this->assertEqual($array_copy, $array_expected, 'Single array was altered.');
@@ -47,12 +47,12 @@ function testDrupalAlter() {
 
     // Verify alteration of multiple arguments.
     $array_copy = $array;
-    $array_expected = array('foo' => 'Drupal theme');
+    $array_expected = ['foo' => 'Drupal theme'];
     $entity_copy = clone $entity;
     $entity_expected = clone $entity;
     $entity_expected->foo = 'Drupal theme';
     $array2_copy = $array;
-    $array2_expected = array('foo' => 'Drupal theme');
+    $array2_expected = ['foo' => 'Drupal theme'];
     \Drupal::moduleHandler()->alter('drupal_alter', $array_copy, $entity_copy, $array2_copy);
     \Drupal::theme()->alter('drupal_alter', $array_copy, $entity_copy, $array2_copy);
     $this->assertEqual($array_copy, $array_expected, 'First argument to \Drupal::moduleHandler->alter() was altered.');
@@ -63,9 +63,9 @@ function testDrupalAlter() {
     // common_test_module_implements_alter() places 'block' implementation after
     // other modules.
     $array_copy = $array;
-    $array_expected = array('foo' => 'Drupal block theme');
-    \Drupal::moduleHandler()->alter(array('drupal_alter', 'drupal_alter_foo'), $array_copy);
-    \Drupal::theme()->alter(array('drupal_alter', 'drupal_alter_foo'), $array_copy);
+    $array_expected = ['foo' => 'Drupal block theme'];
+    \Drupal::moduleHandler()->alter(['drupal_alter', 'drupal_alter_foo'], $array_copy);
+    \Drupal::theme()->alter(['drupal_alter', 'drupal_alter_foo'], $array_copy);
     $this->assertEqual($array_copy, $array_expected, 'hook_TYPE_alter() implementations ran in correct order.');
   }
 
diff --git a/core/modules/system/src/Tests/Common/FormatDateTest.php b/core/modules/system/src/Tests/Common/FormatDateTest.php
index cddf0a3fae200cb0a8c5156b9e8320867a057326..c6a57c96b8df476c71d0ad37c40030d33fae0a59 100644
--- a/core/modules/system/src/Tests/Common/FormatDateTest.php
+++ b/core/modules/system/src/Tests/Common/FormatDateTest.php
@@ -17,7 +17,7 @@ class FormatDateTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Arbitrary langcode for a custom language.
@@ -32,16 +32,16 @@ protected function setUp() {
       ->save();
     $formats = $this->container->get('entity.manager')
       ->getStorage('date_format')
-      ->loadMultiple(array('long', 'medium', 'short'));
+      ->loadMultiple(['long', 'medium', 'short']);
     $formats['long']->setPattern('l, j. F Y - G:i')->save();
     $formats['medium']->setPattern('j. F Y - G:i')->save();
     $formats['short']->setPattern('Y M j - g:ia')->save();
     $this->refreshVariables();
 
-    $this->settingsSet('locale_custom_strings_' . self::LANGCODE, array(
-      '' => array('Sunday' => 'domingo'),
-      'Long month name' => array('March' => 'marzo'),
-    ));
+    $this->settingsSet('locale_custom_strings_' . self::LANGCODE, [
+      '' => ['Sunday' => 'domingo'],
+      'Long month name' => ['March' => 'marzo'],
+    ]);
 
     ConfigurableLanguage::createFromLangcode(static::LANGCODE)->save();
     $this->resetAll();
@@ -52,22 +52,22 @@ protected function setUp() {
    */
   function testAdminDefinedFormatDate() {
     // Create and log in an admin user.
-    $this->drupalLogin($this->drupalCreateUser(array('administer site configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['administer site configuration']));
 
     // Add new date format.
-    $edit = array(
+    $edit = [
       'id' => 'example_style',
       'label' => 'Example Style',
       'date_format_pattern' => 'j M y',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
 
     // Add a second date format with a different case than the first.
-    $edit = array(
+    $edit = [
       'id' => 'example_style_uppercase',
       'label' => 'Example Style Uppercase',
       'date_format_pattern' => 'j M Y',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertText(t('Custom date format added.'));
 
diff --git a/core/modules/system/src/Tests/Common/NoJavaScriptAnonymousTest.php b/core/modules/system/src/Tests/Common/NoJavaScriptAnonymousTest.php
index 9c9f070d5ee82b5a9a2dfd9ca6eaf4044535cac2..e671f872130d321b65d261bc120e47f25680e520 100644
--- a/core/modules/system/src/Tests/Common/NoJavaScriptAnonymousTest.php
+++ b/core/modules/system/src/Tests/Common/NoJavaScriptAnonymousTest.php
@@ -19,7 +19,7 @@ protected function setUp() {
     parent::setUp();
 
     // Grant the anonymous user the permission to look at user profiles.
-    user_role_grant_permissions('anonymous', array('access user profiles'));
+    user_role_grant_permissions('anonymous', ['access user profiles']);
   }
 
   /**
@@ -27,9 +27,9 @@ protected function setUp() {
    */
   public function testNoJavaScript() {
     // Create a node that is listed on the frontpage.
-    $this->drupalCreateNode(array(
+    $this->drupalCreateNode([
       'promote' => NodeInterface::PROMOTED,
-    ));
+    ]);
     $user = $this->drupalCreateUser();
 
     // Test frontpage.
diff --git a/core/modules/system/src/Tests/Common/RenderWebTest.php b/core/modules/system/src/Tests/Common/RenderWebTest.php
index fde7fa6835fad20cb6bdb237aed6967a45f3905a..49449d477988d594bbbd46bb985dbceea9568913 100644
--- a/core/modules/system/src/Tests/Common/RenderWebTest.php
+++ b/core/modules/system/src/Tests/Common/RenderWebTest.php
@@ -19,7 +19,7 @@ class RenderWebTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('common_test');
+  public static $modules = ['common_test'];
 
   /**
    * Asserts the cache context for the wrapper format is always present.
@@ -45,133 +45,133 @@ function testWrapperFormatCacheContext() {
    */
   function testDrupalRenderFormElements() {
     // Define a series of form elements.
-    $element = array(
+    $element = [
       '#type' => 'button',
       '#value' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//input[@type=:type]', array(':type' => 'submit'));
+    ];
+    $this->assertRenderedElement($element, '//input[@type=:type]', [':type' => 'submit']);
 
-    $element = array(
+    $element = [
       '#type' => 'textfield',
       '#title' => $this->randomMachineName(),
       '#value' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//input[@type=:type]', array(':type' => 'text'));
+    ];
+    $this->assertRenderedElement($element, '//input[@type=:type]', [':type' => 'text']);
 
-    $element = array(
+    $element = [
       '#type' => 'password',
       '#title' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//input[@type=:type]', array(':type' => 'password'));
+    ];
+    $this->assertRenderedElement($element, '//input[@type=:type]', [':type' => 'password']);
 
-    $element = array(
+    $element = [
       '#type' => 'textarea',
       '#title' => $this->randomMachineName(),
       '#value' => $this->randomMachineName(),
-    );
+    ];
     $this->assertRenderedElement($element, '//textarea');
 
-    $element = array(
+    $element = [
       '#type' => 'radio',
       '#title' => $this->randomMachineName(),
       '#value' => FALSE,
-    );
-    $this->assertRenderedElement($element, '//input[@type=:type]', array(':type' => 'radio'));
+    ];
+    $this->assertRenderedElement($element, '//input[@type=:type]', [':type' => 'radio']);
 
-    $element = array(
+    $element = [
       '#type' => 'checkbox',
       '#title' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//input[@type=:type]', array(':type' => 'checkbox'));
+    ];
+    $this->assertRenderedElement($element, '//input[@type=:type]', [':type' => 'checkbox']);
 
-    $element = array(
+    $element = [
       '#type' => 'select',
       '#title' => $this->randomMachineName(),
-      '#options' => array(
+      '#options' => [
         0 => $this->randomMachineName(),
         1 => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     $this->assertRenderedElement($element, '//select');
 
-    $element = array(
+    $element = [
       '#type' => 'file',
       '#title' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//input[@type=:type]', array(':type' => 'file'));
+    ];
+    $this->assertRenderedElement($element, '//input[@type=:type]', [':type' => 'file']);
 
-    $element = array(
+    $element = [
       '#type' => 'item',
       '#title' => $this->randomMachineName(),
       '#markup' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//div[contains(@class, :class) and contains(., :markup)]/label[contains(., :label)]', array(
+    ];
+    $this->assertRenderedElement($element, '//div[contains(@class, :class) and contains(., :markup)]/label[contains(., :label)]', [
       ':class' => 'js-form-type-item',
       ':markup' => $element['#markup'],
       ':label' => $element['#title'],
-    ));
+    ]);
 
-    $element = array(
+    $element = [
       '#type' => 'hidden',
       '#title' => $this->randomMachineName(),
       '#value' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//input[@type=:type]', array(':type' => 'hidden'));
+    ];
+    $this->assertRenderedElement($element, '//input[@type=:type]', [':type' => 'hidden']);
 
-    $element = array(
+    $element = [
       '#type' => 'link',
       '#title' => $this->randomMachineName(),
       '#url' => Url::fromRoute('common_test.destination'),
-      '#options' => array(
+      '#options' => [
         'absolute' => TRUE,
-      ),
-    );
-    $this->assertRenderedElement($element, '//a[@href=:href and contains(., :title)]', array(
+      ],
+    ];
+    $this->assertRenderedElement($element, '//a[@href=:href and contains(., :title)]', [
       ':href' => URL::fromRoute('common_test.destination')->setAbsolute()->toString(),
       ':title' => $element['#title'],
-    ));
+    ]);
 
-    $element = array(
+    $element = [
       '#type' => 'details',
       '#open' => TRUE,
       '#title' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//details/summary[contains(., :title)]', array(
+    ];
+    $this->assertRenderedElement($element, '//details/summary[contains(., :title)]', [
       ':title' => $element['#title'],
-    ));
+    ]);
 
-    $element = array(
+    $element = [
       '#type' => 'details',
       '#open' => TRUE,
       '#title' => $this->randomMachineName(),
-    );
+    ];
     $this->assertRenderedElement($element, '//details');
 
-    $element['item'] = array(
+    $element['item'] = [
       '#type' => 'item',
       '#title' => $this->randomMachineName(),
       '#markup' => $this->randomMachineName(),
-    );
-    $this->assertRenderedElement($element, '//details/div/div[contains(@class, :class) and contains(., :markup)]', array(
+    ];
+    $this->assertRenderedElement($element, '//details/div/div[contains(@class, :class) and contains(., :markup)]', [
       ':class' => 'js-form-type-item',
       ':markup' => $element['item']['#markup'],
-    ));
+    ]);
   }
 
   /**
    * Tests that elements are rendered properly.
    */
-  protected function assertRenderedElement(array $element, $xpath, array $xpath_args = array()) {
+  protected function assertRenderedElement(array $element, $xpath, array $xpath_args = []) {
     $original_element = $element;
     $this->setRawContent(drupal_render_root($element));
     $this->verbose('<hr />' . $this->getRawContent());
 
     // @see \Drupal\simpletest\WebTestBase::xpath()
     $xpath = $this->buildXPathQuery($xpath, $xpath_args);
-    $element += array('#value' => NULL);
-    $this->assertFieldByXPath($xpath, $element['#value'], format_string('#type @type was properly rendered.', array(
+    $element += ['#value' => NULL];
+    $this->assertFieldByXPath($xpath, $element['#value'], format_string('#type @type was properly rendered.', [
       '@type' => var_export($element['#type'], TRUE),
-    )));
+    ]));
   }
 
 }
diff --git a/core/modules/system/src/Tests/Common/SimpleTestErrorCollectorTest.php b/core/modules/system/src/Tests/Common/SimpleTestErrorCollectorTest.php
index 1be7e9482669514073c6f22b1788b98d5a7ce4c3..016d23c3ad5ce20e2d8b0aaa90d1b47274e86ac0 100644
--- a/core/modules/system/src/Tests/Common/SimpleTestErrorCollectorTest.php
+++ b/core/modules/system/src/Tests/Common/SimpleTestErrorCollectorTest.php
@@ -16,7 +16,7 @@ class SimpleTestErrorCollectorTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('system_test', 'error_test');
+  public static $modules = ['system_test', 'error_test'];
 
   /**
    * Errors triggered during the test.
@@ -26,13 +26,13 @@ class SimpleTestErrorCollectorTest extends WebTestBase {
    *
    * @var Array
    */
-  protected $collectedErrors = array();
+  protected $collectedErrors = [];
 
   /**
    * Tests that simpletest collects errors from the tested site.
    */
   function testErrorCollect() {
-    $this->collectedErrors = array();
+    $this->collectedErrors = [];
     $this->drupalGet('error-test/generate-warnings-with-report');
     $this->assertEqual(count($this->collectedErrors), 3, 'Three errors were collected');
 
@@ -71,11 +71,11 @@ protected function error($message = '', $group = 'Other', array $caller = NULL)
     }
     // Everything else should be collected but not propagated.
     else {
-      $this->collectedErrors[] = array(
+      $this->collectedErrors[] = [
         'message' => $message,
         'group' => $group,
         'caller' => $caller
-      );
+      ];
     }
   }
 
@@ -83,11 +83,11 @@ protected function error($message = '', $group = 'Other', array $caller = NULL)
    * Asserts that a collected error matches what we are expecting.
    */
   function assertError($error, $group, $function, $file, $message = NULL) {
-    $this->assertEqual($error['group'], $group, format_string("Group was %group", array('%group' => $group)));
-    $this->assertEqual($error['caller']['function'], $function, format_string("Function was %function", array('%function' => $function)));
-    $this->assertEqual(drupal_basename($error['caller']['file']), $file, format_string("File was %file", array('%file' => $file)));
+    $this->assertEqual($error['group'], $group, format_string("Group was %group", ['%group' => $group]));
+    $this->assertEqual($error['caller']['function'], $function, format_string("Function was %function", ['%function' => $function]));
+    $this->assertEqual(drupal_basename($error['caller']['file']), $file, format_string("File was %file", ['%file' => $file]));
     if (isset($message)) {
-      $this->assertEqual($error['message'], $message, format_string("Message was %message", array('%message' => $message)));
+      $this->assertEqual($error['message'], $message, format_string("Message was %message", ['%message' => $message]));
     }
   }
 
diff --git a/core/modules/system/src/Tests/Common/UrlTest.php b/core/modules/system/src/Tests/Common/UrlTest.php
index 062e3e42d5e501fa0b86e169ca3df3b52ee76c95..da839869764fcbce4fe3846567b2a003d86d539a 100644
--- a/core/modules/system/src/Tests/Common/UrlTest.php
+++ b/core/modules/system/src/Tests/Common/UrlTest.php
@@ -20,7 +20,7 @@
  */
 class UrlTest extends WebTestBase {
 
-  public static $modules = array('common_test', 'url_alter_test');
+  public static $modules = ['common_test', 'url_alter_test'];
 
   /**
    * Confirms that invalid URLs are filtered in link generating functions.
@@ -32,7 +32,7 @@ function testLinkXSS() {
     $encoded_path = "3CSCRIPT%3Ealert%28%27XSS%27%29%3C/SCRIPT%3E";
 
     $link = \Drupal::l($text, Url::fromUserInput('/' . $path));
-    $this->assertTrue(strpos($link, $encoded_path) !== FALSE && strpos($link, $path) === FALSE, format_string('XSS attack @path was filtered by \Drupal\Core\Utility\LinkGeneratorInterface::generate().', array('@path' => $path)));
+    $this->assertTrue(strpos($link, $encoded_path) !== FALSE && strpos($link, $path) === FALSE, format_string('XSS attack @path was filtered by \Drupal\Core\Utility\LinkGeneratorInterface::generate().', ['@path' => $path]));
 
     // Test \Drupal\Core\Url.
     $link = Url::fromUri('base:' . $path)->toString();
@@ -76,15 +76,15 @@ function testLinkAttributes() {
     $renderer = $this->container->get('renderer');
 
     // Test that hreflang is added when a link has a known language.
-    $language = new Language(array('id' => 'fr', 'name' => 'French'));
-    $hreflang_link = array(
+    $language = new Language(['id' => 'fr', 'name' => 'French']);
+    $hreflang_link = [
       '#type' => 'link',
-      '#options' => array(
+      '#options' => [
         'language' => $language,
-      ),
+      ],
       '#url' => Url::fromUri('https://www.drupal.org'),
       '#title' => 'bar',
-    );
+    ];
     $langcode = $language->getId();
 
     // Test that the default hreflang handling for links does not override a
@@ -93,45 +93,45 @@ function testLinkAttributes() {
     $hreflang_override_link['#options']['attributes']['hreflang'] = 'foo';
 
     $rendered = $renderer->renderRoot($hreflang_link);
-    $this->assertTrue($this->hasAttribute('hreflang', $rendered, $langcode), format_string('hreflang attribute with value @langcode is present on a rendered link when langcode is provided in the render array.', array('@langcode' => $langcode)));
+    $this->assertTrue($this->hasAttribute('hreflang', $rendered, $langcode), format_string('hreflang attribute with value @langcode is present on a rendered link when langcode is provided in the render array.', ['@langcode' => $langcode]));
 
     $rendered = $renderer->renderRoot($hreflang_override_link);
-    $this->assertTrue($this->hasAttribute('hreflang', $rendered, 'foo'), format_string('hreflang attribute with value @hreflang is present on a rendered link when @hreflang is provided in the render array.', array('@hreflang' => 'foo')));
+    $this->assertTrue($this->hasAttribute('hreflang', $rendered, 'foo'), format_string('hreflang attribute with value @hreflang is present on a rendered link when @hreflang is provided in the render array.', ['@hreflang' => 'foo']));
 
     // Test the active class in links produced by
     // \Drupal\Core\Utility\LinkGeneratorInterface::generate() and #type 'link'.
-    $options_no_query = array();
-    $options_query = array(
-      'query' => array(
+    $options_no_query = [];
+    $options_query = [
+      'query' => [
         'foo' => 'bar',
         'one' => 'two',
-      ),
-    );
-    $options_query_reverse = array(
-      'query' => array(
+      ],
+    ];
+    $options_query_reverse = [
+      'query' => [
         'one' => 'two',
         'foo' => 'bar',
-      ),
-    );
+      ],
+    ];
 
     // Test #type link.
     $path = 'common-test/type-link-active-class';
 
     $this->drupalGet($path, $options_no_query);
-    $links = $this->xpath('//a[@href = :href and contains(@class, :class)]', array(':href' => Url::fromRoute('common_test.l_active_class', [], $options_no_query)->toString(), ':class' => 'is-active'));
+    $links = $this->xpath('//a[@href = :href and contains(@class, :class)]', [':href' => Url::fromRoute('common_test.l_active_class', [], $options_no_query)->toString(), ':class' => 'is-active']);
     $this->assertTrue(isset($links[0]), 'A link generated by the link generator to the current page is marked active.');
 
-    $links = $this->xpath('//a[@href = :href and not(contains(@class, :class))]', array(':href' => Url::fromRoute('common_test.l_active_class', [], $options_query)->toString(), ':class' => 'is-active'));
+    $links = $this->xpath('//a[@href = :href and not(contains(@class, :class))]', [':href' => Url::fromRoute('common_test.l_active_class', [], $options_query)->toString(), ':class' => 'is-active']);
     $this->assertTrue(isset($links[0]), 'A link generated by the link generator to the current page with a query string when the current page has no query string is not marked active.');
 
     $this->drupalGet($path, $options_query);
-    $links = $this->xpath('//a[@href = :href and contains(@class, :class)]', array(':href' => Url::fromRoute('common_test.l_active_class', [], $options_query)->toString(), ':class' => 'is-active'));
+    $links = $this->xpath('//a[@href = :href and contains(@class, :class)]', [':href' => Url::fromRoute('common_test.l_active_class', [], $options_query)->toString(), ':class' => 'is-active']);
     $this->assertTrue(isset($links[0]), 'A link generated by the link generator to the current page with a query string that matches the current query string is marked active.');
 
-    $links = $this->xpath('//a[@href = :href and contains(@class, :class)]', array(':href' => Url::fromRoute('common_test.l_active_class', [], $options_query_reverse)->toString(), ':class' => 'is-active'));
+    $links = $this->xpath('//a[@href = :href and contains(@class, :class)]', [':href' => Url::fromRoute('common_test.l_active_class', [], $options_query_reverse)->toString(), ':class' => 'is-active']);
     $this->assertTrue(isset($links[0]), 'A link generated by the link generator to the current page with a query string that has matching parameters to the current query string but in a different order is marked active.');
 
-    $links = $this->xpath('//a[@href = :href and not(contains(@class, :class))]', array(':href' => Url::fromRoute('common_test.l_active_class', [], $options_no_query)->toString(), ':class' => 'is-active'));
+    $links = $this->xpath('//a[@href = :href and not(contains(@class, :class))]', [':href' => Url::fromRoute('common_test.l_active_class', [], $options_no_query)->toString(), ':class' => 'is-active']);
     $this->assertTrue(isset($links[0]), 'A link generated by the link generator to the current page without a query string when the current page has a query string is not marked active.');
 
     // Test adding a custom class in links produced by
@@ -139,22 +139,22 @@ function testLinkAttributes() {
     // Test the link generator.
     $class_l = $this->randomMachineName();
     $link_l = \Drupal::l($this->randomMachineName(), new Url('<current>', [], ['attributes' => ['class' => [$class_l]]]));
-    $this->assertTrue($this->hasAttribute('class', $link_l, $class_l), format_string('Custom class @class is present on link when requested by l()', array('@class' => $class_l)));
+    $this->assertTrue($this->hasAttribute('class', $link_l, $class_l), format_string('Custom class @class is present on link when requested by l()', ['@class' => $class_l]));
 
     // Test #type.
     $class_theme = $this->randomMachineName();
-    $type_link = array(
+    $type_link = [
       '#type' => 'link',
       '#title' => $this->randomMachineName(),
       '#url' => Url::fromRoute('<current>'),
-      '#options' => array(
-        'attributes' => array(
-          'class' => array($class_theme),
-        ),
-      ),
-    );
+      '#options' => [
+        'attributes' => [
+          'class' => [$class_theme],
+        ],
+      ],
+    ];
     $link_theme = $renderer->renderRoot($type_link);
-    $this->assertTrue($this->hasAttribute('class', $link_theme, $class_theme), format_string('Custom class @class is present on link when requested by #type', array('@class' => $class_theme)));
+    $this->assertTrue($this->hasAttribute('class', $link_theme, $class_theme), format_string('Custom class @class is present on link when requested by #type', ['@class' => $class_theme]));
   }
 
   /**
@@ -169,26 +169,26 @@ function testLinkRenderArrayText() {
 
     // Test a renderable array passed to the link generator.
     $renderer->executeInRenderContext(new RenderContext(), function() use ($renderer, $l) {
-      $renderable_text = array('#markup' => 'foo');
+      $renderable_text = ['#markup' => 'foo'];
       $l_renderable_text = \Drupal::l($renderable_text, Url::fromUri('https://www.drupal.org'));
       $this->assertEqual($l_renderable_text, $l);
     });
 
     // Test a themed link with plain text 'text'.
-    $type_link_plain_array = array(
+    $type_link_plain_array = [
       '#type' => 'link',
       '#title' => 'foo',
       '#url' => Url::fromUri('https://www.drupal.org'),
-    );
+    ];
     $type_link_plain = $renderer->renderRoot($type_link_plain_array);
     $this->assertEqual($type_link_plain, $l);
 
     // Build a themed link with renderable 'text'.
-    $type_link_nested_array = array(
+    $type_link_nested_array = [
       '#type' => 'link',
-      '#title' => array('#markup' => 'foo'),
+      '#title' => ['#markup' => 'foo'],
       '#url' => Url::fromUri('https://www.drupal.org'),
-    );
+    ];
     $type_link_nested = $renderer->renderRoot($type_link_nested_array);
     $this->assertEqual($type_link_nested, $l);
   }
@@ -212,36 +212,36 @@ private function hasAttribute($attribute, $link, $class) {
    * Tests UrlHelper::filterQueryParameters().
    */
   function testDrupalGetQueryParameters() {
-    $original = array(
+    $original = [
       'a' => 1,
-      'b' => array(
+      'b' => [
         'd' => 4,
-        'e' => array(
+        'e' => [
           'f' => 5,
-        ),
-      ),
+        ],
+      ],
       'c' => 3,
-    );
+    ];
 
     // First-level exclusion.
     $result = $original;
     unset($result['b']);
-    $this->assertEqual(UrlHelper::filterQueryParameters($original, array('b')), $result, "'b' was removed.");
+    $this->assertEqual(UrlHelper::filterQueryParameters($original, ['b']), $result, "'b' was removed.");
 
     // Second-level exclusion.
     $result = $original;
     unset($result['b']['d']);
-    $this->assertEqual(UrlHelper::filterQueryParameters($original, array('b[d]')), $result, "'b[d]' was removed.");
+    $this->assertEqual(UrlHelper::filterQueryParameters($original, ['b[d]']), $result, "'b[d]' was removed.");
 
     // Third-level exclusion.
     $result = $original;
     unset($result['b']['e']['f']);
-    $this->assertEqual(UrlHelper::filterQueryParameters($original, array('b[e][f]')), $result, "'b[e][f]' was removed.");
+    $this->assertEqual(UrlHelper::filterQueryParameters($original, ['b[e][f]']), $result, "'b[e][f]' was removed.");
 
     // Multiple exclusions.
     $result = $original;
     unset($result['a'], $result['b']['e'], $result['c']);
-    $this->assertEqual(UrlHelper::filterQueryParameters($original, array('a', 'b[e]', 'c')), $result, "'a', 'b[e]', 'c' were removed.");
+    $this->assertEqual(UrlHelper::filterQueryParameters($original, ['a', 'b[e]', 'c']), $result, "'a', 'b[e]', 'c' were removed.");
   }
 
   /**
@@ -250,15 +250,15 @@ function testDrupalGetQueryParameters() {
   function testDrupalParseUrl() {
     // Relative, absolute, and external URLs, without/with explicit script path,
     // without/with Drupal path.
-    foreach (array('', '/', 'https://www.drupal.org/') as $absolute) {
-      foreach (array('', 'index.php/') as $script) {
-        foreach (array('', 'foo/bar') as $path) {
+    foreach (['', '/', 'https://www.drupal.org/'] as $absolute) {
+      foreach (['', 'index.php/'] as $script) {
+        foreach (['', 'foo/bar'] as $path) {
           $url = $absolute . $script . $path . '?foo=bar&bar=baz&baz#foo';
-          $expected = array(
+          $expected = [
             'path' => $absolute . $script . $path,
-            'query' => array('foo' => 'bar', 'bar' => 'baz', 'baz' => ''),
+            'query' => ['foo' => 'bar', 'bar' => 'baz', 'baz' => ''],
             'fragment' => 'foo',
-          );
+          ];
           $this->assertEqual(UrlHelper::parse($url), $expected, 'URL parsed correctly.');
         }
       }
@@ -266,11 +266,11 @@ function testDrupalParseUrl() {
 
     // Relative URL that is known to confuse parse_url().
     $url = 'foo/bar:1';
-    $result = array(
+    $result = [
       'path' => 'foo/bar:1',
-      'query' => array(),
+      'query' => [],
       'fragment' => '',
-    );
+    ];
     $this->assertEqual(UrlHelper::parse($url), $result, 'Relative URL parsed correctly.');
 
     // Test that drupal can recognize an absolute URL. Used to prevent attack vectors.
@@ -296,7 +296,7 @@ function testExternalUrls() {
     // Verify fragment can be overridden in an external URL.
     $url = $test_url . '#drupal';
     $fragment = $this->randomMachineName(10);
-    $result = Url::fromUri($url, array('fragment' => $fragment))->toString();
+    $result = Url::fromUri($url, ['fragment' => $fragment])->toString();
     $this->assertEqual($test_url . '#' . $fragment, $result, 'External URL fragment is overridden with a custom fragment in $options.');
 
     // Verify external URL can contain a query string.
@@ -306,14 +306,14 @@ function testExternalUrls() {
 
     // Verify external URL can be extended with a query string.
     $url = $test_url;
-    $query = array($this->randomMachineName(5) => $this->randomMachineName(5));
-    $result = Url::fromUri($url, array('query' => $query))->toString();
+    $query = [$this->randomMachineName(5) => $this->randomMachineName(5)];
+    $result = Url::fromUri($url, ['query' => $query])->toString();
     $this->assertEqual($url . '?' . http_build_query($query, '', '&'), $result, 'External URL can be extended with a query string in $options.');
 
     // Verify query string can be extended in an external URL.
     $url = $test_url . '?drupal=awesome';
-    $query = array($this->randomMachineName(5) => $this->randomMachineName(5));
-    $result = Url::fromUri($url, array('query' => $query))->toString();
+    $query = [$this->randomMachineName(5) => $this->randomMachineName(5)];
+    $result = Url::fromUri($url, ['query' => $query])->toString();
     $this->assertEqual($url . '&' . http_build_query($query, '', '&'), $result);
   }
 
diff --git a/core/modules/system/src/Tests/Condition/ConditionFormTest.php b/core/modules/system/src/Tests/Condition/ConditionFormTest.php
index 21d0fcb9e6dde8853db5f245aade60f6d0b667ab..8d2ea6d330bed1e759c13c70bb263e7e6d7196df 100644
--- a/core/modules/system/src/Tests/Condition/ConditionFormTest.php
+++ b/core/modules/system/src/Tests/Condition/ConditionFormTest.php
@@ -16,14 +16,14 @@
  */
 class ConditionFormTest extends WebTestBase {
 
-  public static $modules = array('node', 'condition_test');
+  public static $modules = ['node', 'condition_test'];
 
   /**
    * Submit the condition_node_type_test_form to test condition forms.
    */
   function testConfigForm() {
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Page'));
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Page']);
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
 
     $article = Node::create([
       'type' => 'article',
@@ -34,7 +34,7 @@ function testConfigForm() {
     $this->drupalGet('condition_test');
     $this->assertField('bundles[article]', 'There is an article bundle selector.');
     $this->assertField('bundles[page]', 'There is a page bundle selector.');
-    $this->drupalPostForm(NULL, array('bundles[page]' => 'page', 'bundles[article]' => 'article'), t('Submit'));
+    $this->drupalPostForm(NULL, ['bundles[page]' => 'page', 'bundles[article]' => 'article'], t('Submit'));
     // @see \Drupal\condition_test\FormController::submitForm()
     $this->assertText('Bundle: page');
     $this->assertText('Bundle: article');
diff --git a/core/modules/system/src/Tests/Database/DatabaseWebTestBase.php b/core/modules/system/src/Tests/Database/DatabaseWebTestBase.php
index d484d68fd2031c80d122438b2d1a8a896b9aae90..8fb369a37618e120e0e453a3be24dabb5a116446 100644
--- a/core/modules/system/src/Tests/Database/DatabaseWebTestBase.php
+++ b/core/modules/system/src/Tests/Database/DatabaseWebTestBase.php
@@ -15,7 +15,7 @@ abstract class DatabaseWebTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('database_test');
+  public static $modules = ['database_test'];
 
   protected function setUp() {
     parent::setUp();
diff --git a/core/modules/system/src/Tests/Database/SelectPagerDefaultTest.php b/core/modules/system/src/Tests/Database/SelectPagerDefaultTest.php
index cdfeab8d0a1f0a6c22bdf72c18c5413f4cd3028d..e56c19f91f16682f21c878da34a76ebbc7d1487a 100644
--- a/core/modules/system/src/Tests/Database/SelectPagerDefaultTest.php
+++ b/core/modules/system/src/Tests/Database/SelectPagerDefaultTest.php
@@ -33,14 +33,14 @@ function testEvenPagerQuery() {
     }
 
     for ($page = 0; $page <= $num_pages; ++$page) {
-      $this->drupalGet('database_test/pager_query_even/' . $limit, array('query' => array('page' => $page)));
+      $this->drupalGet('database_test/pager_query_even/' . $limit, ['query' => ['page' => $page]]);
       $data = json_decode($this->getRawContent());
 
       if ($page == $num_pages) {
         $correct_number = $count - ($limit * $page);
       }
 
-      $this->assertEqual(count($data->names), $correct_number, format_string('Correct number of records returned by pager: @number', array('@number' => $correct_number)));
+      $this->assertEqual(count($data->names), $correct_number, format_string('Correct number of records returned by pager: @number', ['@number' => $correct_number]));
     }
   }
 
@@ -67,14 +67,14 @@ function testOddPagerQuery() {
     }
 
     for ($page = 0; $page <= $num_pages; ++$page) {
-      $this->drupalGet('database_test/pager_query_odd/' . $limit, array('query' => array('page' => $page)));
+      $this->drupalGet('database_test/pager_query_odd/' . $limit, ['query' => ['page' => $page]]);
       $data = json_decode($this->getRawContent());
 
       if ($page == $num_pages) {
         $correct_number = $count - ($limit * $page);
       }
 
-      $this->assertEqual(count($data->names), $correct_number, format_string('Correct number of records returned by pager: @number', array('@number' => $correct_number)));
+      $this->assertEqual(count($data->names), $correct_number, format_string('Correct number of records returned by pager: @number', ['@number' => $correct_number]));
     }
   }
 
@@ -87,7 +87,7 @@ function testInnerPagerQuery() {
     $query = db_select('test', 't')
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender');
     $query
-      ->fields('t', array('age'))
+      ->fields('t', ['age'])
       ->orderBy('age')
       ->limit(5);
 
@@ -97,7 +97,7 @@ function testInnerPagerQuery() {
     $ages = $outer_query
       ->execute()
       ->fetchCol();
-    $this->assertEqual($ages, array(25, 26, 27, 28), 'Inner pager query returned the correct ages.');
+    $this->assertEqual($ages, [25, 26, 27, 28], 'Inner pager query returned the correct ages.');
   }
 
   /**
@@ -109,16 +109,16 @@ function testHavingPagerQuery() {
     $query = db_select('test', 't')
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender');
     $query
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->orderBy('name')
       ->groupBy('name')
-      ->having('MAX(age) > :count', array(':count' => 26))
+      ->having('MAX(age) > :count', [':count' => 26])
       ->limit(5);
 
     $ages = $query
       ->execute()
       ->fetchCol();
-    $this->assertEqual($ages, array('George', 'Ringo'), 'Pager query with having expression returned the correct ages.');
+    $this->assertEqual($ages, ['George', 'Ringo'], 'Pager query with having expression returned the correct ages.');
   }
 
   /**
@@ -127,15 +127,15 @@ function testHavingPagerQuery() {
   function testElementNumbers() {
 
     $request = Request::createFromGlobals();
-    $request->query->replace(array(
+    $request->query->replace([
       'page' => '3, 2, 1, 0',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
 
     $name = db_select('test', 't')
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender')
       ->element(2)
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->orderBy('age')
       ->limit(1)
       ->execute()
@@ -147,7 +147,7 @@ function testElementNumbers() {
     $name = db_select('test', 't')
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender')
       ->element(1)
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->orderBy('age')
       ->limit(1)
       ->execute()
@@ -156,7 +156,7 @@ function testElementNumbers() {
 
     $name = db_select('test', 't')
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender')
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->orderBy('age')
       ->limit(1)
       ->execute()
diff --git a/core/modules/system/src/Tests/Database/SelectTableSortDefaultTest.php b/core/modules/system/src/Tests/Database/SelectTableSortDefaultTest.php
index 7ccbbb5efbf124b022082122cd2201640302493f..8ed05bd5c1fadbab0ba37da35ff39f7882092f02 100644
--- a/core/modules/system/src/Tests/Database/SelectTableSortDefaultTest.php
+++ b/core/modules/system/src/Tests/Database/SelectTableSortDefaultTest.php
@@ -16,17 +16,17 @@ class SelectTableSortDefaultTest extends DatabaseWebTestBase {
    * because the pager depends on GET parameters.
    */
   function testTableSortQuery() {
-    $sorts = array(
-      array('field' => t('Task ID'), 'sort' => 'desc', 'first' => 'perform at superbowl', 'last' => 'eat'),
-      array('field' => t('Task ID'), 'sort' => 'asc', 'first' => 'eat', 'last' => 'perform at superbowl'),
-      array('field' => t('Task'), 'sort' => 'asc', 'first' => 'code', 'last' => 'sleep'),
-      array('field' => t('Task'), 'sort' => 'desc', 'first' => 'sleep', 'last' => 'code'),
+    $sorts = [
+      ['field' => t('Task ID'), 'sort' => 'desc', 'first' => 'perform at superbowl', 'last' => 'eat'],
+      ['field' => t('Task ID'), 'sort' => 'asc', 'first' => 'eat', 'last' => 'perform at superbowl'],
+      ['field' => t('Task'), 'sort' => 'asc', 'first' => 'code', 'last' => 'sleep'],
+      ['field' => t('Task'), 'sort' => 'desc', 'first' => 'sleep', 'last' => 'code'],
       // more elements here
 
-    );
+    ];
 
     foreach ($sorts as $sort) {
-      $this->drupalGet('database_test/tablesort/', array('query' => array('order' => $sort['field'], 'sort' => $sort['sort'])));
+      $this->drupalGet('database_test/tablesort/', ['query' => ['order' => $sort['field'], 'sort' => $sort['sort']]]);
       $data = json_decode($this->getRawContent());
 
       $first = array_shift($data->tasks);
@@ -44,24 +44,24 @@ function testTableSortQuery() {
    * header happens first.
    */
   function testTableSortQueryFirst() {
-    $sorts = array(
-      array('field' => t('Task ID'), 'sort' => 'desc', 'first' => 'perform at superbowl', 'last' => 'eat'),
-      array('field' => t('Task ID'), 'sort' => 'asc', 'first' => 'eat', 'last' => 'perform at superbowl'),
-      array('field' => t('Task'), 'sort' => 'asc', 'first' => 'code', 'last' => 'sleep'),
-      array('field' => t('Task'), 'sort' => 'desc', 'first' => 'sleep', 'last' => 'code'),
+    $sorts = [
+      ['field' => t('Task ID'), 'sort' => 'desc', 'first' => 'perform at superbowl', 'last' => 'eat'],
+      ['field' => t('Task ID'), 'sort' => 'asc', 'first' => 'eat', 'last' => 'perform at superbowl'],
+      ['field' => t('Task'), 'sort' => 'asc', 'first' => 'code', 'last' => 'sleep'],
+      ['field' => t('Task'), 'sort' => 'desc', 'first' => 'sleep', 'last' => 'code'],
       // more elements here
 
-    );
+    ];
 
     foreach ($sorts as $sort) {
-      $this->drupalGet('database_test/tablesort_first/', array('query' => array('order' => $sort['field'], 'sort' => $sort['sort'])));
+      $this->drupalGet('database_test/tablesort_first/', ['query' => ['order' => $sort['field'], 'sort' => $sort['sort']]]);
       $data = json_decode($this->getRawContent());
 
       $first = array_shift($data->tasks);
       $last = array_pop($data->tasks);
 
-      $this->assertEqual($first->task, $sort['first'], format_string('Items appear in the correct order sorting by @field @sort.', array('@field' => $sort['field'], '@sort' => $sort['sort'])));
-      $this->assertEqual($last->task, $sort['last'], format_string('Items appear in the correct order sorting by @field @sort.', array('@field' => $sort['field'], '@sort' => $sort['sort'])));
+      $this->assertEqual($first->task, $sort['first'], format_string('Items appear in the correct order sorting by @field @sort.', ['@field' => $sort['field'], '@sort' => $sort['sort']]));
+      $this->assertEqual($last->task, $sort['last'], format_string('Items appear in the correct order sorting by @field @sort.', ['@field' => $sort['field'], '@sort' => $sort['sort']]));
     }
   }
 
diff --git a/core/modules/system/src/Tests/Database/TemporaryQueryTest.php b/core/modules/system/src/Tests/Database/TemporaryQueryTest.php
index 1bfa75466e25d9998e32079f21c580e9d5c755bd..fd75df3655bfc5dea78af32ba091cbce3c5a28e5 100644
--- a/core/modules/system/src/Tests/Database/TemporaryQueryTest.php
+++ b/core/modules/system/src/Tests/Database/TemporaryQueryTest.php
@@ -14,7 +14,7 @@ class TemporaryQueryTest extends DatabaseWebTestBase {
    *
    * @var array
    */
-  public static $modules = array('database_test');
+  public static $modules = ['database_test'];
 
   /**
    * Returns the number of rows of a table.
@@ -38,8 +38,8 @@ function testTemporaryQuery() {
     }
 
     // Now try to run two db_query_temporary() in the same request.
-    $table_name_test = db_query_temporary('SELECT name FROM {test}', array());
-    $table_name_task = db_query_temporary('SELECT pid FROM {test_task}', array());
+    $table_name_test = db_query_temporary('SELECT name FROM {test}', []);
+    $table_name_task = db_query_temporary('SELECT pid FROM {test_task}', []);
 
     $this->assertEqual($this->countTableRows($table_name_test), $this->countTableRows('test'), 'A temporary table was created successfully in this request.');
     $this->assertEqual($this->countTableRows($table_name_task), $this->countTableRows('test_task'), 'A second temporary table was created successfully in this request.');
@@ -50,7 +50,7 @@ function testTemporaryQuery() {
       -- Let's select some rows into a temporary table
       SELECT name FROM {test}
     ";
-    $table_name_test = db_query_temporary($sql, array());
+    $table_name_test = db_query_temporary($sql, []);
     $this->assertEqual($this->countTableRows($table_name_test), $this->countTableRows('test'), 'Leading white space and comments do not interfere with temporary table creation.');
   }
 
diff --git a/core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php b/core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php
index a26350e5a57b05b58f1ba66c3424f8f69f26b158..7f5c5e340ffe33fad002285b8b146822d3cfb8fe 100644
--- a/core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php
+++ b/core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php
@@ -71,18 +71,18 @@ protected function setUp() {
     if ($this->entity->getEntityType()->get('field_ui_base_route')) {
       // Add field, so we can modify the field storage and field entities to
       // verify that changes to those indeed clear cache tags.
-      FieldStorageConfig::create(array(
+      FieldStorageConfig::create([
         'field_name' => 'configurable_field',
         'entity_type' => $this->entity->getEntityTypeId(),
         'type' => 'test_field',
-        'settings' => array(),
-      ))->save();
+        'settings' => [],
+      ])->save();
       FieldConfig::create([
         'entity_type' => $this->entity->getEntityTypeId(),
         'bundle' => $this->entity->bundle(),
         'field_name' => 'configurable_field',
         'label' => 'Configurable field',
-        'settings' => array(),
+        'settings' => [],
       ])->save();
 
       // Reload the entity now that a new field has been added to it.
@@ -113,11 +113,11 @@ protected function setUp() {
    * @see \Drupal\simpletest\TestBase::getInfo()
    */
   protected static function generateStandardizedInfo($entity_type_label, $group) {
-    return array(
+    return [
       'name' => "$entity_type_label entity cache tags",
       'description' => "Test the $entity_type_label entity's cache tags.",
       'group' => $group,
-    );
+    ];
   }
 
   /**
@@ -173,7 +173,7 @@ protected function getAdditionalCacheContextsForEntity(EntityInterface $entity)
    * @see \Drupal\system\Tests\Entity\EntityCacheTagsTestBase::createEntity()
    */
   protected function getAdditionalCacheTagsForEntity(EntityInterface $entity) {
-    return array();
+    return [];
   }
 
   /**
@@ -208,7 +208,7 @@ protected function getAdditionalCacheTagsForEntityListing() {
   protected function selectViewMode($entity_type) {
     $view_modes = \Drupal::entityManager()
       ->getStorage('entity_view_mode')
-      ->loadByProperties(array('targetEntityType' => $entity_type));
+      ->loadByProperties(['targetEntityType' => $entity_type]);
 
     if (empty($view_modes)) {
       return 'default';
@@ -244,46 +244,46 @@ protected function createReferenceTestEntities($referenced_entity) {
 
     // Add a field of the given type to the given entity type's "foo" bundle.
     $field_name = $referenced_entity->getEntityTypeId() . '_reference';
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => $entity_type,
       'type' => 'entity_reference',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-      'settings' => array(
+      'settings' => [
         'target_type' => $referenced_entity->getEntityTypeId(),
-      ),
-    ))->save();
+      ],
+    ])->save();
     FieldConfig::create([
       'field_name' => $field_name,
       'entity_type' => $entity_type,
       'bundle' => $bundle,
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
-        'handler_settings' => array(
-          'target_bundles' => array(
+        'handler_settings' => [
+          'target_bundles' => [
             $referenced_entity->bundle() => $referenced_entity->bundle(),
-          ),
-          'sort' => array('field' => '_none'),
+          ],
+          'sort' => ['field' => '_none'],
           'auto_create' => FALSE,
-        ),
-      ),
+        ],
+      ],
     ])->save();
     if (!$this->entity->getEntityType()->hasHandlerClass('view_builder')) {
       entity_get_display($entity_type, $bundle, 'full')
-        ->setComponent($field_name, array(
+        ->setComponent($field_name, [
           'type' => 'entity_reference_label',
-        ))
+        ])
         ->save();
     }
     else {
       $referenced_entity_view_mode = $this->selectViewMode($this->entity->getEntityTypeId());
       entity_get_display($entity_type, $bundle, 'full')
-        ->setComponent($field_name, array(
+        ->setComponent($field_name, [
           'type' => 'entity_reference_entity_view',
-          'settings' => array(
+          'settings' => [
             'view_mode' => $referenced_entity_view_mode,
-          ),
-        ))
+          ],
+        ])
         ->save();
     }
 
@@ -291,28 +291,28 @@ protected function createReferenceTestEntities($referenced_entity) {
     $label_key = \Drupal::entityManager()->getDefinition($entity_type)->getKey('label');
     $referencing_entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         $label_key => 'Referencing ' . $entity_type,
         'status' => 1,
         'type' => $bundle,
-        $field_name => array('target_id' => $referenced_entity->id()),
-      ));
+        $field_name => ['target_id' => $referenced_entity->id()],
+      ]);
     $referencing_entity->save();
 
     // Create an entity that does not reference the entity being tested.
     $non_referencing_entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         $label_key => 'Non-referencing ' . $entity_type,
         'status' => 1,
         'type' => $bundle,
-      ));
+      ]);
     $non_referencing_entity->save();
 
-    return array(
+    return [
       $referencing_entity,
       $non_referencing_entity,
-    );
+    ];
   }
 
   /**
@@ -353,7 +353,7 @@ public function testReferencedEntity() {
 
     $page_cache_tags_referencing_entity = in_array('user.permissions', $this->getAccessCacheContextsForEntity($this->referencingEntity)) ? ['config:user.role.anonymous'] : [];
 
-    $view_cache_tag = array();
+    $view_cache_tag = [];
     if ($this->entity->getEntityType()->hasHandlerClass('view_builder')) {
       $view_cache_tag = \Drupal::entityManager()->getViewBuilder($entity_type)
         ->getCacheTags();
diff --git a/core/modules/system/src/Tests/Entity/EntityDefinitionTestTrait.php b/core/modules/system/src/Tests/Entity/EntityDefinitionTestTrait.php
index 0123597e7df715678d9f6c6281cdc919c128e522..7fcabd7e8d6fbc1290e5e2d8f7ffd5f8fa21841b 100644
--- a/core/modules/system/src/Tests/Entity/EntityDefinitionTestTrait.php
+++ b/core/modules/system/src/Tests/Entity/EntityDefinitionTestTrait.php
@@ -202,9 +202,9 @@ protected function removeBundleField() {
    * @see \Drupal\entity_test\EntityTestStorageSchema::getEntitySchema()
    */
   protected function addEntityIndex() {
-    $indexes = array(
-      'entity_test_update__new_index' => array('name', 'user_id'),
-    );
+    $indexes = [
+      'entity_test_update__new_index' => ['name', 'user_id'],
+    ];
     $this->state->set('entity_test_update.additional_entity_indexes', $indexes);
   }
 
diff --git a/core/modules/system/src/Tests/Entity/EntityFormTest.php b/core/modules/system/src/Tests/Entity/EntityFormTest.php
index 4e0ced5126aeeb01a257af0d97f4a0351c27fdc6..8bcb0c591cdc4c075d38b63fa312c5c51248453d 100644
--- a/core/modules/system/src/Tests/Entity/EntityFormTest.php
+++ b/core/modules/system/src/Tests/Entity/EntityFormTest.php
@@ -17,11 +17,11 @@ class EntityFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'language');
+  public static $modules = ['entity_test', 'language'];
 
   protected function setUp() {
     parent::setUp();
-    $web_user = $this->drupalCreateUser(array('administer entity_test content', 'view test entity'));
+    $web_user = $this->drupalCreateUser(['administer entity_test content', 'view test entity']);
     $this->drupalLogin($web_user);
 
     // Add a language.
@@ -69,28 +69,28 @@ protected function doTestFormCRUD($entity_type) {
     $name1 = $this->randomMachineName(8);
     $name2 = $this->randomMachineName(10);
 
-    $edit = array(
+    $edit = [
       'name[0][value]' => $name1,
       'field_test_text[0][value]' => $this->randomMachineName(16),
-    );
+    ];
 
     $this->drupalPostForm($entity_type . '/add', $edit, t('Save'));
     $entity = $this->loadEntityByName($entity_type, $name1);
-    $this->assertTrue($entity, format_string('%entity_type: Entity found in the database.', array('%entity_type' => $entity_type)));
+    $this->assertTrue($entity, format_string('%entity_type: Entity found in the database.', ['%entity_type' => $entity_type]));
 
     $edit['name[0][value]'] = $name2;
     $this->drupalPostForm($entity_type . '/manage/' . $entity->id() . '/edit', $edit, t('Save'));
     $entity = $this->loadEntityByName($entity_type, $name1);
-    $this->assertFalse($entity, format_string('%entity_type: The entity has been modified.', array('%entity_type' => $entity_type)));
+    $this->assertFalse($entity, format_string('%entity_type: The entity has been modified.', ['%entity_type' => $entity_type]));
     $entity = $this->loadEntityByName($entity_type, $name2);
-    $this->assertTrue($entity, format_string('%entity_type: Modified entity found in the database.', array('%entity_type' => $entity_type)));
-    $this->assertNotEqual($entity->name->value, $name1, format_string('%entity_type: The entity name has been modified.', array('%entity_type' => $entity_type)));
+    $this->assertTrue($entity, format_string('%entity_type: Modified entity found in the database.', ['%entity_type' => $entity_type]));
+    $this->assertNotEqual($entity->name->value, $name1, format_string('%entity_type: The entity name has been modified.', ['%entity_type' => $entity_type]));
 
     $this->drupalGet($entity_type . '/manage/' . $entity->id() . '/edit');
     $this->clickLink(t('Delete'));
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     $entity = $this->loadEntityByName($entity_type, $name2);
-    $this->assertFalse($entity, format_string('%entity_type: Entity not found in the database.', array('%entity_type' => $entity_type)));
+    $this->assertFalse($entity, format_string('%entity_type: Entity not found in the database.', ['%entity_type' => $entity_type]));
   }
 
   /**
@@ -104,33 +104,33 @@ protected function doTestMultilingualFormCRUD($entity_type_id) {
     $name1_ro = $this->randomMachineName(9);
     $name2_ro = $this->randomMachineName(11);
 
-    $edit = array(
+    $edit = [
       'name[0][value]' => $name1,
       'field_test_text[0][value]' => $this->randomMachineName(16),
-    );
+    ];
 
     $this->drupalPostForm($entity_type_id . '/add', $edit, t('Save'));
     $entity = $this->loadEntityByName($entity_type_id, $name1);
-    $this->assertTrue($entity, format_string('%entity_type: Entity found in the database.', array('%entity_type' => $entity_type_id)));
+    $this->assertTrue($entity, format_string('%entity_type: Entity found in the database.', ['%entity_type' => $entity_type_id]));
 
     // Add a translation to the newly created entity without using the Content
     // translation module.
     $entity->addTranslation('ro', ['name' => $name1_ro])->save();
     $translated_entity = $this->loadEntityByName($entity_type_id, $name1)->getTranslation('ro');
-    $this->assertEqual($translated_entity->name->value, $name1_ro, format_string('%entity_type: The translation has been added.', array('%entity_type' => $entity_type_id)));
+    $this->assertEqual($translated_entity->name->value, $name1_ro, format_string('%entity_type: The translation has been added.', ['%entity_type' => $entity_type_id]));
 
     $edit['name[0][value]'] = $name2_ro;
     $this->drupalPostForm('ro/' . $entity_type_id . '/manage/' . $entity->id() . '/edit', $edit, t('Save'));
     $translated_entity = $this->loadEntityByName($entity_type_id, $name1)->getTranslation('ro');
-    $this->assertTrue($translated_entity, format_string('%entity_type: Modified translation found in the database.', array('%entity_type' => $entity_type_id)));
-    $this->assertEqual($translated_entity->name->value, $name2_ro, format_string('%entity_type: The name of the translation has been modified.', array('%entity_type' => $entity_type_id)));
+    $this->assertTrue($translated_entity, format_string('%entity_type: Modified translation found in the database.', ['%entity_type' => $entity_type_id]));
+    $this->assertEqual($translated_entity->name->value, $name2_ro, format_string('%entity_type: The name of the translation has been modified.', ['%entity_type' => $entity_type_id]));
 
     $this->drupalGet('ro/' . $entity_type_id . '/manage/' . $entity->id() . '/edit');
     $this->clickLink(t('Delete'));
-    $this->drupalPostForm(NULL, array(), t('Delete Romanian translation'));
+    $this->drupalPostForm(NULL, [], t('Delete Romanian translation'));
     $entity = $this->loadEntityByName($entity_type_id, $name1);
-    $this->assertNotNull($entity, format_string('%entity_type: The original entity still exists.', array('%entity_type' => $entity_type_id)));
-    $this->assertFalse($entity->hasTranslation('ro'), format_string('%entity_type: Entity translation does not exist anymore.', array('%entity_type' => $entity_type_id)));
+    $this->assertNotNull($entity, format_string('%entity_type: The original entity still exists.', ['%entity_type' => $entity_type_id]));
+    $this->assertFalse($entity->hasTranslation('ro'), format_string('%entity_type: Entity translation does not exist anymore.', ['%entity_type' => $entity_type_id]));
   }
 
   /**
@@ -141,7 +141,7 @@ protected function loadEntityByName($entity_type, $name) {
     // correctly picked up.
     $entity_storage = $this->container->get('entity.manager')->getStorage($entity_type);
     $entity_storage->resetCache();
-    $entities = $entity_storage->loadByProperties(array('name' => $name));
+    $entities = $entity_storage->loadByProperties(['name' => $name]);
     return $entities ? current($entities) : NULL;
   }
 
diff --git a/core/modules/system/src/Tests/Entity/EntityTranslationFormTest.php b/core/modules/system/src/Tests/Entity/EntityTranslationFormTest.php
index d64e0192f358d81c7aa2bf89e63c49ea88404e6c..e2854d272110e3ba233d5c5aace5b426063251e2 100644
--- a/core/modules/system/src/Tests/Entity/EntityTranslationFormTest.php
+++ b/core/modules/system/src/Tests/Entity/EntityTranslationFormTest.php
@@ -19,7 +19,7 @@ class EntityTranslationFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'language', 'node');
+  public static $modules = ['entity_test', 'language', 'node'];
 
   protected $langcodes;
 
@@ -29,12 +29,12 @@ protected function setUp() {
     \Drupal::state()->set('entity_test.translation', TRUE);
 
     // Create test languages.
-    $this->langcodes = array();
+    $this->langcodes = [];
     for ($i = 0; $i < 2; ++$i) {
-      $language = ConfigurableLanguage::create(array(
+      $language = ConfigurableLanguage::create([
         'id' => 'l' . $i,
         'label' => $this->randomString(),
-      ));
+      ]);
       $this->langcodes[$i] = $language->id();
       $language->save();
     }
@@ -44,13 +44,13 @@ protected function setUp() {
    * Tests entity form language.
    */
   function testEntityFormLanguage() {
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
-    $web_user = $this->drupalCreateUser(array('create page content', 'edit own page content', 'administer content types'));
+    $web_user = $this->drupalCreateUser(['create page content', 'edit own page content', 'administer content types']);
     $this->drupalLogin($web_user);
 
     // Create a node with language LanguageInterface::LANGCODE_NOT_SPECIFIED.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $this->drupalGet('node/add/page');
@@ -75,21 +75,21 @@ function testEntityFormLanguage() {
 
     // Enable language selector.
     $this->drupalGet('admin/structure/types/manage/page');
-    $edit = array('language_configuration[language_alterable]' => TRUE, 'language_configuration[langcode]' => LanguageInterface::LANGCODE_NOT_SPECIFIED);
+    $edit = ['language_configuration[language_alterable]' => TRUE, 'language_configuration[langcode]' => LanguageInterface::LANGCODE_NOT_SPECIFIED];
     $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
-    $this->assertRaw(t('The content type %type has been updated.', array('%type' => 'Basic page')), 'Basic page content type has been updated.');
+    $this->assertRaw(t('The content type %type has been updated.', ['%type' => 'Basic page']), 'Basic page content type has been updated.');
 
     // Create a node with language.
-    $edit = array();
+    $edit = [];
     $langcode = $this->langcodes[0];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $edit['langcode[0][value]'] = $langcode;
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
-    $this->assertText(t('Basic page @title has been created.', array('@title' => $edit['title[0][value]'])), 'Basic page created.');
+    $this->assertText(t('Basic page @title has been created.', ['@title' => $edit['title[0][value]']]), 'Basic page created.');
 
     // Verify that the creation message contains a link to a node.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'node/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'node/']);
     $this->assert(isset($view_link), 'The message area contains a link to a node');
 
     // Check to make sure the node was created.
diff --git a/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php b/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
index 2ec64e8da8e4c30e8969247616b05ab987b6f36e..5d7dc6fd5d82f65aed78f813c260f084ddce9b49 100644
--- a/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
+++ b/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
@@ -34,7 +34,7 @@ abstract class EntityUnitTestBase extends KernelTestBase {
    *
    * @var array
    */
-  protected $generatedIds = array();
+  protected $generatedIds = [];
 
   /**
    * The state service.
@@ -65,7 +65,7 @@ protected function setUp() {
         // Only check the modules, if the $modules property was not inherited.
         $rp = new \ReflectionProperty($class, 'modules');
         if ($rp->class == $class) {
-          foreach (array_intersect(array('node', 'comment'), $class::$modules) as $module) {
+          foreach (array_intersect(['node', 'comment'], $class::$modules) as $module) {
             $this->installEntitySchema($module);
           }
           if (in_array('forum', $class::$modules, TRUE)) {
@@ -82,7 +82,7 @@ protected function setUp() {
       $class = get_parent_class($class);
     }
 
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
   }
 
   /**
@@ -96,13 +96,13 @@ protected function setUp() {
    * @return \Drupal\user\Entity\User
    *   The created user entity.
    */
-  protected function createUser($values = array(), $permissions = array()) {
+  protected function createUser($values = [], $permissions = []) {
     if ($permissions) {
       // Create a new role and apply permissions to it.
-      $role = Role::create(array(
+      $role = Role::create([
         'id' => strtolower($this->randomMachineName(8)),
         'label' => $this->randomMachineName(8),
-      ));
+      ]);
       $role->save();
       user_role_grant_permissions($role->id(), $permissions);
       $values['roles'][] = $role->id();
@@ -128,7 +128,7 @@ protected function createUser($values = array(), $permissions = array()) {
    */
   protected function reloadEntity(EntityInterface $entity) {
     $controller = $this->entityManager->getStorage($entity->getEntityTypeId());
-    $controller->resetCache(array($entity->id()));
+    $controller->resetCache([$entity->id()]);
     return $controller->load($entity->id());
   }
 
@@ -141,7 +141,7 @@ protected function reloadEntity(EntityInterface $entity) {
   protected function getHooksInfo() {
     $key = 'entity_test.hooks';
     $hooks = $this->state->get($key);
-    $this->state->set($key, array());
+    $this->state->set($key, []);
     return $hooks;
   }
 
@@ -152,7 +152,7 @@ protected function getHooksInfo() {
    *   The module to install.
    */
   protected function installModule($module) {
-    $this->enableModules(array($module));
+    $this->enableModules([$module]);
     $this->refreshServices();
   }
 
@@ -163,7 +163,7 @@ protected function installModule($module) {
    *   The module to uninstall.
    */
   protected function uninstallModule($module) {
-    $this->disableModules(array($module));
+    $this->disableModules([$module]);
     $this->refreshServices();
   }
 
diff --git a/core/modules/system/src/Tests/Entity/EntityWithUriCacheTagsTestBase.php b/core/modules/system/src/Tests/Entity/EntityWithUriCacheTagsTestBase.php
index f6da0a2d2b5b66471dd9306c52e4676ba1c08e3c..74c110380696edc8fd8870abd3219c851f793e6a 100644
--- a/core/modules/system/src/Tests/Entity/EntityWithUriCacheTagsTestBase.php
+++ b/core/modules/system/src/Tests/Entity/EntityWithUriCacheTagsTestBase.php
@@ -53,7 +53,7 @@ public function testEntityUri() {
       }
       $expected_cache_tags = Cache::mergeTags($cache_tag, $view_cache_tag);
       $expected_cache_tags = Cache::mergeTags($expected_cache_tags, $this->getAdditionalCacheTagsForEntity($this->entity));
-      $expected_cache_tags = Cache::mergeTags($expected_cache_tags, array($render_cache_tag));
+      $expected_cache_tags = Cache::mergeTags($expected_cache_tags, [$render_cache_tag]);
       $this->verifyRenderCache($cid, $expected_cache_tags, $redirected_cid);
     }
 
diff --git a/core/modules/system/src/Tests/Form/AlterTest.php b/core/modules/system/src/Tests/Form/AlterTest.php
index ae307224cbcc5f3ba44d0736ff70fb0ff6b1a977..e77cf301376e1537f681979f7134be615251d0e8 100644
--- a/core/modules/system/src/Tests/Form/AlterTest.php
+++ b/core/modules/system/src/Tests/Form/AlterTest.php
@@ -17,7 +17,7 @@ class AlterTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'form_test');
+  public static $modules = ['block', 'form_test'];
 
   /**
    * Tests execution order of hook_form_alter() and hook_form_FORM_ID_alter().
@@ -26,13 +26,13 @@ function testExecutionOrder() {
     $this->drupalGet('form-test/alter');
     // Ensure that the order is first by module, then for a given module, the
     // id-specific one after the generic one.
-    $expected = array(
+    $expected = [
       'block_form_form_test_alter_form_alter() executed.',
       'form_test_form_alter() executed.',
       'form_test_form_form_test_alter_form_alter() executed.',
       'system_form_form_test_alter_form_alter() executed.',
-    );
-    $content = preg_replace('/\s+/', ' ', Xss::filter($this->content, array()));
+    ];
+    $content = preg_replace('/\s+/', ' ', Xss::filter($this->content, []));
     $this->assert(strpos($content, implode(' ', $expected)) !== FALSE, 'Form alter hooks executed in the expected order.');
   }
 
diff --git a/core/modules/system/src/Tests/Form/ArbitraryRebuildTest.php b/core/modules/system/src/Tests/Form/ArbitraryRebuildTest.php
index 3702d35eb342d09d52a10541460bf3d2592113e7..95324c96da30b5c1821e25cabdb74dcd74bf35e3 100644
--- a/core/modules/system/src/Tests/Form/ArbitraryRebuildTest.php
+++ b/core/modules/system/src/Tests/Form/ArbitraryRebuildTest.php
@@ -18,19 +18,19 @@ class ArbitraryRebuildTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('text', 'form_test');
+  public static $modules = ['text', 'form_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Auto-create a field for testing.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => 'user',
       'field_name' => 'test_multiple',
       'type' => 'text',
       'cardinality' => -1,
       'translatable' => FALSE,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'user',
       'field_name' => 'test_multiple',
@@ -38,10 +38,10 @@ protected function setUp() {
       'label' => 'Test a multiple valued field',
     ])->save();
     entity_get_form_display('user', 'user', 'register')
-      ->setComponent('test_multiple', array(
+      ->setComponent('test_multiple', [
         'type' => 'text_textfield',
         'weight' => 0,
-      ))
+      ])
       ->save();
   }
 
@@ -49,10 +49,10 @@ protected function setUp() {
    * Tests a basic rebuild with the user registration form.
    */
   function testUserRegistrationRebuild() {
-    $edit = array(
+    $edit = [
       'name' => 'foo',
       'mail' => 'bar@example.com',
-    );
+    ];
     $this->drupalPostForm('user/register', $edit, 'Rebuild');
     $this->assertText('Form rebuilt.');
     $this->assertFieldByName('name', 'foo', 'Entered username has been kept.');
@@ -63,10 +63,10 @@ function testUserRegistrationRebuild() {
    * Tests a rebuild caused by a multiple value field.
    */
   function testUserRegistrationMultipleField() {
-    $edit = array(
+    $edit = [
       'name' => 'foo',
       'mail' => 'bar@example.com',
-    );
+    ];
     $this->drupalPostForm('user/register', $edit, t('Add another item'));
     $this->assertText('Test a multiple valued field', 'Form has been rebuilt.');
     $this->assertFieldByName('name', 'foo', 'Entered username has been kept.');
diff --git a/core/modules/system/src/Tests/Form/CheckboxTest.php b/core/modules/system/src/Tests/Form/CheckboxTest.php
index ebeeeeae18394152be17a30aab02ae7e1238712a..0e17309d0fef81bc796303f17024ea4db5e117f2 100644
--- a/core/modules/system/src/Tests/Form/CheckboxTest.php
+++ b/core/modules/system/src/Tests/Form/CheckboxTest.php
@@ -17,16 +17,16 @@ class CheckboxTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   function testFormCheckbox() {
     // Ensure that the checked state is determined and rendered correctly for
     // tricky combinations of default and return values.
-    foreach (array(FALSE, NULL, TRUE, 0, '0', '', 1, '1', 'foobar', '1foobar') as $default_value) {
+    foreach ([FALSE, NULL, TRUE, 0, '0', '', 1, '1', 'foobar', '1foobar'] as $default_value) {
       // Only values that can be used for array indices are supported for
       // #return_value, with the exception of integer 0, which is not supported.
       // @see \Drupal\Core\Render\Element\Checkbox::processCheckbox().
-      foreach (array('0', '', 1, '1', 'foobar', '1foobar') as $return_value) {
+      foreach (['0', '', 1, '1', 'foobar', '1foobar'] as $return_value) {
         $form_array = \Drupal::formBuilder()->getForm('\Drupal\form_test\Form\FormTestCheckboxTypeJugglingForm', $default_value, $return_value);
         $form = \Drupal::service('renderer')->renderRoot($form_array);
         if ($default_value === TRUE) {
@@ -48,33 +48,33 @@ function testFormCheckbox() {
           $checked = ($default_value === '1foobar');
         }
         $checked_in_html = strpos($form, 'checked') !== FALSE;
-        $message = format_string('#default_value is %default_value #return_value is %return_value.', array('%default_value' => var_export($default_value, TRUE), '%return_value' => var_export($return_value, TRUE)));
+        $message = format_string('#default_value is %default_value #return_value is %return_value.', ['%default_value' => var_export($default_value, TRUE), '%return_value' => var_export($return_value, TRUE)]);
         $this->assertIdentical($checked, $checked_in_html, $message);
       }
     }
 
     // Ensure that $form_state->getValues() is populated correctly for a
     // checkboxes group that includes a 0-indexed array of options.
-    $results = json_decode($this->drupalPostForm('form-test/checkboxes-zero/1', array(), 'Save'));
-    $this->assertIdentical($results->checkbox_off, array(0, 0, 0), 'All three in checkbox_off are zeroes: off.');
-    $this->assertIdentical($results->checkbox_zero_default, array('0', 0, 0), 'The first choice is on in checkbox_zero_default');
-    $this->assertIdentical($results->checkbox_string_zero_default, array('0', 0, 0), 'The first choice is on in checkbox_string_zero_default');
-    $edit = array('checkbox_off[0]' => '0');
+    $results = json_decode($this->drupalPostForm('form-test/checkboxes-zero/1', [], 'Save'));
+    $this->assertIdentical($results->checkbox_off, [0, 0, 0], 'All three in checkbox_off are zeroes: off.');
+    $this->assertIdentical($results->checkbox_zero_default, ['0', 0, 0], 'The first choice is on in checkbox_zero_default');
+    $this->assertIdentical($results->checkbox_string_zero_default, ['0', 0, 0], 'The first choice is on in checkbox_string_zero_default');
+    $edit = ['checkbox_off[0]' => '0'];
     $results = json_decode($this->drupalPostForm('form-test/checkboxes-zero/1', $edit, 'Save'));
-    $this->assertIdentical($results->checkbox_off, array('0', 0, 0), 'The first choice is on in checkbox_off but the rest is not');
+    $this->assertIdentical($results->checkbox_off, ['0', 0, 0], 'The first choice is on in checkbox_off but the rest is not');
 
     // Ensure that each checkbox is rendered correctly for a checkboxes group
     // that includes a 0-indexed array of options.
-    $this->drupalPostForm('form-test/checkboxes-zero/0', array(), 'Save');
+    $this->drupalPostForm('form-test/checkboxes-zero/0', [], 'Save');
     $checkboxes = $this->xpath('//input[@type="checkbox"]');
 
     $this->assertIdentical(count($checkboxes), 9, 'Correct number of checkboxes found.');
     foreach ($checkboxes as $checkbox) {
       $checked = isset($checkbox['checked']);
       $name = (string) $checkbox['name'];
-      $this->assertIdentical($checked, $name == 'checkbox_zero_default[0]' || $name == 'checkbox_string_zero_default[0]', format_string('Checkbox %name correctly checked', array('%name' => $name)));
+      $this->assertIdentical($checked, $name == 'checkbox_zero_default[0]' || $name == 'checkbox_string_zero_default[0]', format_string('Checkbox %name correctly checked', ['%name' => $name]));
     }
-    $edit = array('checkbox_off[0]' => '0');
+    $edit = ['checkbox_off[0]' => '0'];
     $this->drupalPostForm('form-test/checkboxes-zero/0', $edit, 'Save');
     $checkboxes = $this->xpath('//input[@type="checkbox"]');
 
@@ -82,7 +82,7 @@ function testFormCheckbox() {
     foreach ($checkboxes as $checkbox) {
       $checked = isset($checkbox['checked']);
       $name = (string) $checkbox['name'];
-      $this->assertIdentical($checked, $name == 'checkbox_off[0]' || $name == 'checkbox_zero_default[0]' || $name == 'checkbox_string_zero_default[0]', format_string('Checkbox %name correctly checked', array('%name' => $name)));
+      $this->assertIdentical($checked, $name == 'checkbox_off[0]' || $name == 'checkbox_zero_default[0]' || $name == 'checkbox_string_zero_default[0]', format_string('Checkbox %name correctly checked', ['%name' => $name]));
     }
   }
 
diff --git a/core/modules/system/src/Tests/Form/ConfirmFormTest.php b/core/modules/system/src/Tests/Form/ConfirmFormTest.php
index 312aa2ef7c58c7ab1bfe7d949e94b4b097db3942..a26d493e6bb51bdbad4269bac5b480d69acd074d 100644
--- a/core/modules/system/src/Tests/Form/ConfirmFormTest.php
+++ b/core/modules/system/src/Tests/Form/ConfirmFormTest.php
@@ -18,33 +18,33 @@ class ConfirmFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   function testConfirmForm() {
     // Test the building of the form.
     $this->drupalGet('form-test/confirm-form');
     $site_name = $this->config('system.site')->get('name');
-    $this->assertTitle(t('ConfirmFormTestForm::getQuestion(). | @site-name', array('@site-name' => $site_name)), 'The question was found as the page title.');
+    $this->assertTitle(t('ConfirmFormTestForm::getQuestion(). | @site-name', ['@site-name' => $site_name]), 'The question was found as the page title.');
     $this->assertText(t('ConfirmFormTestForm::getDescription().'), 'The description was used.');
     $this->assertFieldByXPath('//input[@id="edit-submit"]', t('ConfirmFormTestForm::getConfirmText().'), 'The confirm text was used.');
 
     // Test cancelling the form.
     $this->clickLink(t('ConfirmFormTestForm::getCancelText().'));
-    $this->assertUrl('form-test/autocomplete', array(), "The form's cancel link was followed.");
+    $this->assertUrl('form-test/autocomplete', [], "The form's cancel link was followed.");
 
     // Test submitting the form.
     $this->drupalPostForm('form-test/confirm-form', NULL, t('ConfirmFormTestForm::getConfirmText().'));
     $this->assertText('The ConfirmFormTestForm::submitForm() method was used for this form.');
-    $this->assertUrl('', array(), "The form's redirect was followed.");
+    $this->assertUrl('', [], "The form's redirect was followed.");
 
     // Test submitting the form with a destination.
-    $this->drupalPostForm('form-test/confirm-form', NULL, t('ConfirmFormTestForm::getConfirmText().'), array('query' => array('destination' => 'admin/config')));
-    $this->assertUrl('admin/config', array(), "The form's redirect was not followed, the destination query string was followed.");
+    $this->drupalPostForm('form-test/confirm-form', NULL, t('ConfirmFormTestForm::getConfirmText().'), ['query' => ['destination' => 'admin/config']]);
+    $this->assertUrl('admin/config', [], "The form's redirect was not followed, the destination query string was followed.");
 
     // Test cancelling the form with a complex destination.
     $this->drupalGet('form-test/confirm-form-array-path');
     $this->clickLink(t('ConfirmFormArrayPathTestForm::getCancelText().'));
-    $this->assertUrl('form-test/confirm-form', array('query' => array('destination' => 'admin/config')), "The form's complex cancel link was followed.");
+    $this->assertUrl('form-test/confirm-form', ['query' => ['destination' => 'admin/config']], "The form's complex cancel link was followed.");
   }
 
   /**
@@ -53,14 +53,14 @@ function testConfirmForm() {
   public function testConfirmFormWithExternalDestination() {
     $this->drupalGet('form-test/confirm-form');
     $this->assertCancelLinkUrl(Url::fromRoute('form_test.route8'));
-    $this->drupalGet('form-test/confirm-form', array('query' => array('destination' => 'node')));
+    $this->drupalGet('form-test/confirm-form', ['query' => ['destination' => 'node']]);
     $this->assertCancelLinkUrl(Url::fromUri('internal:/node'));
-    $this->drupalGet('form-test/confirm-form', array('query' => array('destination' => 'http://example.com')));
+    $this->drupalGet('form-test/confirm-form', ['query' => ['destination' => 'http://example.com']]);
     $this->assertCancelLinkUrl(Url::fromRoute('form_test.route8'));
-    $this->drupalGet('form-test/confirm-form', array('query' => array('destination' => '<front>')));
+    $this->drupalGet('form-test/confirm-form', ['query' => ['destination' => '<front>']]);
     $this->assertCancelLinkUrl(Url::fromRoute('<front>'));
     // Other invalid destinations, should fall back to the form default.
-    $this->drupalGet('form-test/confirm-form', array('query' => array('destination' => '/http://example.com')));
+    $this->drupalGet('form-test/confirm-form', ['query' => ['destination' => '/http://example.com']]);
     $this->assertCancelLinkUrl(Url::fromRoute('form_test.route8'));
   }
 
diff --git a/core/modules/system/src/Tests/Form/ElementTest.php b/core/modules/system/src/Tests/Form/ElementTest.php
index 0ae2edc49595fd4556551e2e4eb3299756065b8c..5b63c6b11e96584cfccaf35554ec210ba39363d3 100644
--- a/core/modules/system/src/Tests/Form/ElementTest.php
+++ b/core/modules/system/src/Tests/Form/ElementTest.php
@@ -16,7 +16,7 @@ class ElementTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Tests placeholder text for elements that support placeholders.
@@ -25,19 +25,19 @@ function testPlaceHolderText() {
     $this->drupalGet('form-test/placeholder-text');
     $expected = 'placeholder-text';
     // Test to make sure non-textarea elements have the proper placeholder text.
-    foreach (array('textfield', 'tel', 'url', 'password', 'email', 'number') as $type) {
-      $element = $this->xpath('//input[@id=:id and @placeholder=:expected]', array(
+    foreach (['textfield', 'tel', 'url', 'password', 'email', 'number'] as $type) {
+      $element = $this->xpath('//input[@id=:id and @placeholder=:expected]', [
         ':id' => 'edit-' . $type,
         ':expected' => $expected,
-      ));
-      $this->assertTrue(!empty($element), format_string('Placeholder text placed in @type.', array('@type' => $type)));
+      ]);
+      $this->assertTrue(!empty($element), format_string('Placeholder text placed in @type.', ['@type' => $type]));
     }
 
     // Test to make sure textarea has the proper placeholder text.
-    $element = $this->xpath('//textarea[@id=:id and @placeholder=:expected]', array(
+    $element = $this->xpath('//textarea[@id=:id and @placeholder=:expected]', [
       ':id' => 'edit-textarea',
       ':expected' => $expected,
-    ));
+    ]);
     $this->assertTrue(!empty($element), 'Placeholder text placed in textarea.');
   }
 
@@ -48,9 +48,9 @@ function testOptions() {
     $this->drupalGet('form-test/checkboxes-radios');
 
     // Verify that all options appear in their defined order.
-    foreach (array('checkbox', 'radio') as $type) {
-      $elements = $this->xpath('//input[@type=:type]', array(':type' => $type));
-      $expected_values = array('0', 'foo', '1', 'bar', '>');
+    foreach (['checkbox', 'radio'] as $type) {
+      $elements = $this->xpath('//input[@type=:type]', [':type' => $type]);
+      $expected_values = ['0', 'foo', '1', 'bar', '>'];
       foreach ($elements as $element) {
         $expected = array_shift($expected_values);
         $this->assertIdentical((string) $element['value'], $expected);
@@ -68,23 +68,23 @@ function testOptions() {
 
     // Verify that all options appear in their defined order, taking a custom
     // #weight into account.
-    foreach (array('checkbox', 'radio') as $type) {
-      $elements = $this->xpath('//input[@type=:type]', array(':type' => $type));
-      $expected_values = array('0', 'foo', 'bar', '>', '1');
+    foreach (['checkbox', 'radio'] as $type) {
+      $elements = $this->xpath('//input[@type=:type]', [':type' => $type]);
+      $expected_values = ['0', 'foo', 'bar', '>', '1'];
       foreach ($elements as $element) {
         $expected = array_shift($expected_values);
         $this->assertIdentical((string) $element['value'], $expected);
       }
     }
     // Verify that custom #description properties are output.
-    foreach (array('checkboxes', 'radios') as $type) {
-      $elements = $this->xpath('//input[@id=:id]/following-sibling::div[@class=:class]', array(
+    foreach (['checkboxes', 'radios'] as $type) {
+      $elements = $this->xpath('//input[@id=:id]/following-sibling::div[@class=:class]', [
         ':id' => 'edit-' . $type . '-foo',
         ':class' => 'description',
-      ));
-      $this->assertTrue(count($elements), format_string('Custom %type option description found.', array(
+      ]);
+      $this->assertTrue(count($elements), format_string('Custom %type option description found.', [
         '%type' => $type,
-      )));
+      ]));
     }
   }
 
@@ -95,11 +95,11 @@ function testWrapperIds() {
     $this->drupalGet('form-test/checkboxes-radios');
 
     // Verify that wrapper id is different from element id.
-    foreach (array('checkboxes', 'radios') as $type) {
-      $element_ids = $this->xpath('//div[@id=:id]', array(':id' => 'edit-' . $type));
-      $wrapper_ids = $this->xpath('//fieldset[@id=:id]', array(':id' => 'edit-' . $type . '--wrapper'));
-      $this->assertTrue(count($element_ids) == 1, format_string('A single element id found for type %type', array('%type' => $type)));
-      $this->assertTrue(count($wrapper_ids) == 1, format_string('A single wrapper id found for type %type', array('%type' => $type)));
+    foreach (['checkboxes', 'radios'] as $type) {
+      $element_ids = $this->xpath('//div[@id=:id]', [':id' => 'edit-' . $type]);
+      $wrapper_ids = $this->xpath('//fieldset[@id=:id]', [':id' => 'edit-' . $type . '--wrapper']);
+      $this->assertTrue(count($element_ids) == 1, format_string('A single element id found for type %type', ['%type' => $type]));
+      $this->assertTrue(count($wrapper_ids) == 1, format_string('A single wrapper id found for type %type', ['%type' => $type]));
     }
   }
 
@@ -162,7 +162,7 @@ public function testFormAutocomplete() {
     $result = $this->xpath('//input[@id="edit-autocomplete-2" and contains(@data-autocomplete-path, "form-test/autocomplete-2/value")]');
     $this->assertEqual(count($result), 0, 'Ensure that the user does not have access to the autocompletion');
 
-    $user = $this->drupalCreateUser(array('access autocomplete test'));
+    $user = $this->drupalCreateUser(['access autocomplete test']);
     $this->drupalLogin($user);
     $this->drupalGet('form-test/autocomplete');
 
diff --git a/core/modules/system/src/Tests/Form/ElementsLabelsTest.php b/core/modules/system/src/Tests/Form/ElementsLabelsTest.php
index 5965dc2552d439de3248e27869ea1e22d177b899..02f4659f1206deb29dd4b33a0a211393158007ea 100644
--- a/core/modules/system/src/Tests/Form/ElementsLabelsTest.php
+++ b/core/modules/system/src/Tests/Form/ElementsLabelsTest.php
@@ -16,7 +16,7 @@ class ElementsLabelsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Test form elements, labels, title attributes and required marks output
@@ -137,12 +137,12 @@ function testFormsInThemeLessEnvironments() {
    * Return a form with element with not all properties defined.
    */
   protected function getFormWithLimitedProperties() {
-    $form = array();
+    $form = [];
 
-    $form['fieldset'] = array(
+    $form['fieldset'] = [
       '#type' => 'fieldset',
       '#title' => 'Fieldset',
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/src/Tests/Form/ElementsTableSelectTest.php b/core/modules/system/src/Tests/Form/ElementsTableSelectTest.php
index 34a558cb0d48aa67d5e24159037fd6503eb42f0b..e09ba776aeb2e7c29f2f7380c51757743d02f8b0 100644
--- a/core/modules/system/src/Tests/Form/ElementsTableSelectTest.php
+++ b/core/modules/system/src/Tests/Form/ElementsTableSelectTest.php
@@ -17,7 +17,7 @@ class ElementsTableSelectTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Test the display of checkboxes when #multiple is TRUE.
@@ -31,9 +31,9 @@ function testMultipleTrue() {
     // Test for the presence of the Select all rows tableheader.
     $this->assertFieldByXPath('//th[@class="select-all"]', NULL, 'Presence of the "Select all" checkbox.');
 
-    $rows = array('row1', 'row2', 'row3');
+    $rows = ['row1', 'row2', 'row3'];
     foreach ($rows as $row) {
-      $this->assertFieldByXPath('//input[@type="checkbox"]', $row, format_string('Checkbox for value @row.', array('@row' => $row)));
+      $this->assertFieldByXPath('//input[@type="checkbox"]', $row, format_string('Checkbox for value @row.', ['@row' => $row]));
     }
   }
 
@@ -41,20 +41,20 @@ function testMultipleTrue() {
    * Test the presence of ajax functionality for all options.
    */
   function testAjax() {
-    $rows = array('row1', 'row2', 'row3');
+    $rows = ['row1', 'row2', 'row3'];
     // Test checkboxes (#multiple == TRUE).
     foreach ($rows as $row) {
       $element = 'tableselect[' . $row . ']';
-      $edit = array($element => TRUE);
+      $edit = [$element => TRUE];
       $result = $this->drupalPostAjaxForm('form_test/tableselect/multiple-true', $edit, $element);
-      $this->assertFalse(empty($result), t('Ajax triggers on checkbox for @row.', array('@row' => $row)));
+      $this->assertFalse(empty($result), t('Ajax triggers on checkbox for @row.', ['@row' => $row]));
     }
     // Test radios (#multiple == FALSE).
     $element = 'tableselect';
     foreach ($rows as $row) {
-      $edit = array($element => $row);
+      $edit = [$element => $row];
       $result = $this->drupalPostAjaxForm('form_test/tableselect/multiple-false', $edit, $element);
-      $this->assertFalse(empty($result), t('Ajax triggers on radio for @row.', array('@row' => $row)));
+      $this->assertFalse(empty($result), t('Ajax triggers on radio for @row.', ['@row' => $row]));
     }
   }
 
@@ -69,9 +69,9 @@ function testMultipleFalse() {
     // Test for the absence of the Select all rows tableheader.
     $this->assertNoFieldByXPath('//th[@class="select-all"]', '', 'Absence of the "Select all" checkbox.');
 
-    $rows = array('row1', 'row2', 'row3');
+    $rows = ['row1', 'row2', 'row3'];
     foreach ($rows as $row) {
-      $this->assertFieldByXPath('//input[@type="radio"]', $row, format_string('Radio button for value @row.', array('@row' => $row)));
+      $this->assertFieldByXPath('//input[@type="radio"]', $row, format_string('Radio button for value @row.', ['@row' => $row]));
     }
   }
 
@@ -93,7 +93,7 @@ function testTableselectColSpan() {
     // radio, one cell in the first column, one cell in the second column,
     // and two cells in the third column which has colspan 2.
     for ( $i = 0; $i <= 1; $i++) {
-      $this->assertEqual(count($table_body[0]->tr[$i]->td), 5, format_string('There are five cells in row @row.', array('@row' => $i)));
+      $this->assertEqual(count($table_body[0]->tr[$i]->td), 5, format_string('There are five cells in row @row.', ['@row' => $i]));
     }
     // The third row should have 3 cells, one for the radio, one spanning the
     // first and second column, and a third in column 3 (which has colspan 3).
@@ -114,7 +114,7 @@ function testEmptyText() {
   function testMultipleTrueSubmit() {
 
     // Test a submission with one checkbox checked.
-    $edit = array();
+    $edit = [];
     $edit['tableselect[row1]'] = TRUE;
     $this->drupalPostForm('form_test/tableselect/multiple-true', $edit, 'Submit');
 
@@ -170,18 +170,18 @@ function testMultipleTrueOptionchecker() {
 
     list($header, $options) = _form_test_tableselect_get_data();
 
-    $form['tableselect'] = array(
+    $form['tableselect'] = [
       '#type' => 'tableselect',
       '#header' => $header,
       '#options' => $options,
-    );
+    ];
 
     // Test with a valid value.
-    list(, , $errors) = $this->formSubmitHelper($form, array('tableselect' => array('row1' => 'row1')));
+    list(, , $errors) = $this->formSubmitHelper($form, ['tableselect' => ['row1' => 'row1']]);
     $this->assertFalse(isset($errors['tableselect']), 'Option checker allows valid values for checkboxes.');
 
     // Test with an invalid value.
-    list(, , $errors) = $this->formSubmitHelper($form, array('tableselect' => array('non_existing_value' => 'non_existing_value')));
+    list(, , $errors) = $this->formSubmitHelper($form, ['tableselect' => ['non_existing_value' => 'non_existing_value']]);
     $this->assertTrue(isset($errors['tableselect']), 'Option checker disallows invalid values for checkboxes.');
 
   }
@@ -194,19 +194,19 @@ function testMultipleFalseOptionchecker() {
 
     list($header, $options) = _form_test_tableselect_get_data();
 
-    $form['tableselect'] = array(
+    $form['tableselect'] = [
       '#type' => 'tableselect',
       '#header' => $header,
       '#options' => $options,
       '#multiple' => FALSE,
-    );
+    ];
 
     // Test with a valid value.
-    list(, , $errors) = $this->formSubmitHelper($form, array('tableselect' => 'row1'));
+    list(, , $errors) = $this->formSubmitHelper($form, ['tableselect' => 'row1']);
     $this->assertFalse(isset($errors['tableselect']), 'Option checker allows valid values for radio buttons.');
 
     // Test with an invalid value.
-    list(, , $errors) = $this->formSubmitHelper($form, array('tableselect' => 'non_existing_value'));
+    list(, , $errors) = $this->formSubmitHelper($form, ['tableselect' => 'non_existing_value']);
     $this->assertTrue(isset($errors['tableselect']), 'Option checker disallows invalid values for radio buttons.');
   }
 
@@ -226,7 +226,7 @@ private function formSubmitHelper($form, $edit) {
     $form_id = $this->randomMachineName();
     $form_state = new FormState();
 
-    $form['op'] = array('#type' => 'submit', '#value' => t('Submit'));
+    $form['op'] = ['#type' => 'submit', '#value' => t('Submit')];
     // The form token CSRF protection should not interfere with this test, so we
     // bypass it by setting the token to FALSE.
     $form['#token'] = FALSE;
@@ -252,7 +252,7 @@ private function formSubmitHelper($form, $edit) {
 
     // Return the processed form together with form_state and errors
     // to allow the caller lowlevel access to the form.
-    return array($form, $form_state, $errors);
+    return [$form, $form_state, $errors];
   }
 
 }
diff --git a/core/modules/system/src/Tests/Form/ElementsVerticalTabsTest.php b/core/modules/system/src/Tests/Form/ElementsVerticalTabsTest.php
index 2e630cccae067a829cf81519844c626f6d0fc66d..73d5dfabb702697a37b36605871b429ade33b792 100644
--- a/core/modules/system/src/Tests/Form/ElementsVerticalTabsTest.php
+++ b/core/modules/system/src/Tests/Form/ElementsVerticalTabsTest.php
@@ -18,7 +18,7 @@ class ElementsVerticalTabsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * A user with permission to access vertical_tab_test_tabs.
@@ -37,7 +37,7 @@ class ElementsVerticalTabsTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('access vertical_tab_test tabs'));
+    $this->adminUser = $this->drupalCreateUser(['access vertical_tab_test tabs']);
     $this->webUser = $this->drupalCreateUser();
     $this->drupalLogin($this->adminUser);
   }
diff --git a/core/modules/system/src/Tests/Form/EmailTest.php b/core/modules/system/src/Tests/Form/EmailTest.php
index e53247f3c0eaa019eaee3e1fcc0d7e5de1b49c06..ae925a996d6e79b381f35f98fa95fdf800a26fe6 100644
--- a/core/modules/system/src/Tests/Form/EmailTest.php
+++ b/core/modules/system/src/Tests/Form/EmailTest.php
@@ -17,7 +17,7 @@ class EmailTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   protected $profile = 'testing';
 
@@ -25,20 +25,20 @@ class EmailTest extends WebTestBase {
    * Tests that #type 'email' fields are properly validated.
    */
   function testFormEmail() {
-    $edit = array();
+    $edit = [];
     $edit['email'] = 'invalid';
     $edit['email_required'] = ' ';
     $this->drupalPostForm('form-test/email', $edit, 'Submit');
-    $this->assertRaw(t('The email address %mail is not valid.', array('%mail' => 'invalid')));
-    $this->assertRaw(t('@name field is required.', array('@name' => 'Address')));
+    $this->assertRaw(t('The email address %mail is not valid.', ['%mail' => 'invalid']));
+    $this->assertRaw(t('@name field is required.', ['@name' => 'Address']));
 
-    $edit = array();
+    $edit = [];
     $edit['email_required'] = '  foo.bar@example.com ';
     $values = Json::decode($this->drupalPostForm('form-test/email', $edit, 'Submit'));
     $this->assertIdentical($values['email'], '');
     $this->assertEqual($values['email_required'], 'foo.bar@example.com');
 
-    $edit = array();
+    $edit = [];
     $edit['email'] = 'foo@example.com';
     $edit['email_required'] = 'example@drupal.org';
     $values = Json::decode($this->drupalPostForm('form-test/email', $edit, 'Submit'));
diff --git a/core/modules/system/src/Tests/Form/FormStoragePageCacheTest.php b/core/modules/system/src/Tests/Form/FormStoragePageCacheTest.php
index 0ef62e865c1a7baa81309fc9823dcb864f51c82e..b6c668658324a124a7494b7bb9dc13e5bd163ac2 100644
--- a/core/modules/system/src/Tests/Form/FormStoragePageCacheTest.php
+++ b/core/modules/system/src/Tests/Form/FormStoragePageCacheTest.php
@@ -14,7 +14,7 @@ class FormStoragePageCacheTest extends WebTestBase {
   /**
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/system/src/Tests/Form/FormTest.php b/core/modules/system/src/Tests/Form/FormTest.php
index cf738369bd0a21f096469b94bea78a0eed285951..fc6c648d1243dac0e66d77c5790dc8a94dca7cec 100644
--- a/core/modules/system/src/Tests/Form/FormTest.php
+++ b/core/modules/system/src/Tests/Form/FormTest.php
@@ -25,19 +25,19 @@ class FormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'form_test', 'file', 'datetime');
+  public static $modules = ['filter', 'form_test', 'file', 'datetime'];
 
   protected function setUp() {
     parent::setUp();
 
-    $filtered_html_format = FilterFormat::create(array(
+    $filtered_html_format = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
-    ));
+    ]);
     $filtered_html_format->save();
 
     $filtered_html_permission = $filtered_html_format->getPermissionName();
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array($filtered_html_permission));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, [$filtered_html_permission]);
   }
 
   /**
@@ -51,47 +51,47 @@ protected function setUp() {
   function testRequiredFields() {
     // Originates from https://www.drupal.org/node/117748.
     // Sets of empty strings and arrays.
-    $empty_strings = array('""' => "", '"\n"' => "\n", '" "' => " ", '"\t"' => "\t", '" \n\t "' => " \n\t ", '"\n\n\n\n\n"' => "\n\n\n\n\n");
-    $empty_arrays = array('array()' => array());
-    $empty_checkbox = array(NULL);
+    $empty_strings = ['""' => "", '"\n"' => "\n", '" "' => " ", '"\t"' => "\t", '" \n\t "' => " \n\t ", '"\n\n\n\n\n"' => "\n\n\n\n\n"];
+    $empty_arrays = ['array()' => []];
+    $empty_checkbox = [NULL];
 
-    $elements['textfield']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'textfield');
+    $elements['textfield']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'textfield'];
     $elements['textfield']['empty_values'] = $empty_strings;
 
-    $elements['telephone']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'tel');
+    $elements['telephone']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'tel'];
     $elements['telephone']['empty_values'] = $empty_strings;
 
-    $elements['url']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'url');
+    $elements['url']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'url'];
     $elements['url']['empty_values'] = $empty_strings;
 
-    $elements['search']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'search');
+    $elements['search']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'search'];
     $elements['search']['empty_values'] = $empty_strings;
 
-    $elements['password']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'password');
+    $elements['password']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'password'];
     $elements['password']['empty_values'] = $empty_strings;
 
-    $elements['password_confirm']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'password_confirm');
+    $elements['password_confirm']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'password_confirm'];
     // Provide empty values for both password fields.
     foreach ($empty_strings as $key => $value) {
-      $elements['password_confirm']['empty_values'][$key] = array('pass1' => $value, 'pass2' => $value);
+      $elements['password_confirm']['empty_values'][$key] = ['pass1' => $value, 'pass2' => $value];
     }
 
-    $elements['textarea']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'textarea');
+    $elements['textarea']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'textarea'];
     $elements['textarea']['empty_values'] = $empty_strings;
 
-    $elements['radios']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'radios', '#options' => array('' => t('None'), $this->randomMachineName(), $this->randomMachineName(), $this->randomMachineName()));
+    $elements['radios']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'radios', '#options' => ['' => t('None'), $this->randomMachineName(), $this->randomMachineName(), $this->randomMachineName()]];
     $elements['radios']['empty_values'] = $empty_arrays;
 
-    $elements['checkbox']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'checkbox', '#required' => TRUE);
+    $elements['checkbox']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'checkbox', '#required' => TRUE];
     $elements['checkbox']['empty_values'] = $empty_checkbox;
 
-    $elements['checkboxes']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'checkboxes', '#options' => array($this->randomMachineName(), $this->randomMachineName(), $this->randomMachineName()));
+    $elements['checkboxes']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'checkboxes', '#options' => [$this->randomMachineName(), $this->randomMachineName(), $this->randomMachineName()]];
     $elements['checkboxes']['empty_values'] = $empty_arrays;
 
-    $elements['select']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'select', '#options' => array('' => t('None'), $this->randomMachineName(), $this->randomMachineName(), $this->randomMachineName()));
+    $elements['select']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'select', '#options' => ['' => t('None'), $this->randomMachineName(), $this->randomMachineName(), $this->randomMachineName()]];
     $elements['select']['empty_values'] = $empty_strings;
 
-    $elements['file']['element'] = array('#title' => $this->randomMachineName(), '#type' => 'file');
+    $elements['file']['element'] = ['#title' => $this->randomMachineName(), '#type' => 'file'];
     $elements['file']['empty_values'] = $empty_strings;
 
     // Regular expression to find the expected marker on required elements.
@@ -99,11 +99,11 @@ function testRequiredFields() {
     // Go through all the elements and all the empty values for them.
     foreach ($elements as $type => $data) {
       foreach ($data['empty_values'] as $key => $empty) {
-        foreach (array(TRUE, FALSE) as $required) {
+        foreach ([TRUE, FALSE] as $required) {
           $form_id = $this->randomMachineName();
-          $form = array();
+          $form = [];
           $form_state = new FormState();
-          $form['op'] = array('#type' => 'submit', '#value' => t('Submit'));
+          $form['op'] = ['#type' => 'submit', '#value' => t('Submit')];
           $element = $data['element']['#title'];
           $form[$element] = $data['element'];
           $form[$element]['#required'] = $required;
@@ -167,13 +167,13 @@ function testRequiredCheckboxesRadio() {
     $form = \Drupal::formBuilder()->getForm('\Drupal\form_test\Form\FormTestValidateRequiredForm');
 
     // Attempt to submit the form with no required fields set.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('form-test/validate-required', $edit, 'Submit');
 
     // The only error messages that should appear are the relevant 'required'
     // messages for each field.
-    $expected = array();
-    foreach (array('textfield', 'checkboxes', 'select', 'radios') as $key) {
+    $expected = [];
+    foreach (['textfield', 'checkboxes', 'select', 'radios'] as $key) {
       if (isset($form[$key]['#required_error'])) {
         $expected[] = $form[$key]['#required_error'];
       }
@@ -181,7 +181,7 @@ function testRequiredCheckboxesRadio() {
         $expected[] = $form[$key]['#form_test_required_error'];
       }
       else {
-        $expected[] = t('@name field is required.', array('@name' => $form[$key]['#title']));
+        $expected[] = t('@name field is required.', ['@name' => $form[$key]['#title']]);
       }
     }
 
@@ -191,7 +191,7 @@ function testRequiredCheckboxesRadio() {
       $expected_key = array_search($error[0], $expected);
       // If the error message is not one of the expected messages, fail.
       if ($expected_key === FALSE) {
-        $this->fail(format_string("Unexpected error message: @error", array('@error' => $error[0])));
+        $this->fail(format_string("Unexpected error message: @error", ['@error' => $error[0]]));
       }
       // Remove the expected message from the list once it is found.
       else {
@@ -201,7 +201,7 @@ function testRequiredCheckboxesRadio() {
 
     // Fail if any expected messages were not found.
     foreach ($expected as $not_found) {
-      $this->fail(format_string("Found error message: @error", array('@error' => $not_found)));
+      $this->fail(format_string("Found error message: @error", ['@error' => $not_found]));
     }
 
     // Verify that input elements are still empty.
@@ -218,12 +218,12 @@ function testRequiredCheckboxesRadio() {
 
     // Submit again with required fields set and verify that there are no
     // error messages.
-    $edit = array(
+    $edit = [
       'textfield' => $this->randomString(),
       'checkboxes[foo]' => TRUE,
       'select' => 'foo',
       'radios' => 'bar',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Submit');
     $this->assertNoFieldByXpath('//div[contains(@class, "error")]', FALSE, 'No error message is displayed when all required fields are filled.');
     $this->assertRaw("The form_test_validate_required_form form was submitted successfully.", 'Validation form submitted successfully.');
@@ -240,13 +240,13 @@ public function testInputWithInvalidToken() {
     $this->drupalLogin($account);
     // Submit again with required fields set but an invalid form token and
     // verify that all the values are retained.
-    $edit = array(
+    $edit = [
       'textfield' => $this->randomString(),
       'checkboxes[bar]' => TRUE,
       'select' => 'bar',
       'radios' => 'foo',
       'form_token' => 'invalid token',
-    );
+    ];
     $this->drupalPostForm(Url::fromRoute('form_test.validate_required'), $edit, 'Submit');
     $this->assertFieldByXpath('//div[contains(@class, "error")]', NULL, 'Error message is displayed with invalid token even when required fields are filled.');
     $this->assertText('The form has become outdated. Copy any unsaved work in the form below');
@@ -258,11 +258,11 @@ public function testInputWithInvalidToken() {
     $this->assertFieldChecked('edit-radios-foo');
 
     // Check another form that has a textarea input.
-    $edit = array(
+    $edit = [
       'textfield' => $this->randomString(),
       'textarea' => $this->randomString() . "\n",
       'form_token' => 'invalid token',
-    );
+    ];
     $this->drupalPostForm(Url::fromRoute('form_test.required'), $edit, 'Submit');
     $this->assertFieldByXpath('//div[contains(@class, "error")]', NULL, 'Error message is displayed with invalid token even when required fields are filled.');
     $this->assertText('The form has become outdated. Copy any unsaved work in the form below');
@@ -270,20 +270,20 @@ public function testInputWithInvalidToken() {
     $this->assertFieldByName('textarea', $edit['textarea']);
 
     // Check another form that has a number input.
-    $edit = array(
+    $edit = [
       'integer_step' => mt_rand(1, 100),
       'form_token' => 'invalid token',
-    );
+    ];
     $this->drupalPostForm(Url::fromRoute('form_test.number'), $edit, 'Submit');
     $this->assertFieldByXpath('//div[contains(@class, "error")]', NULL, 'Error message is displayed with invalid token even when required fields are filled.');
     $this->assertText('The form has become outdated. Copy any unsaved work in the form below');
     $this->assertFieldByName('integer_step', $edit['integer_step']);
 
     // Check a form with a Url field
-    $edit = array(
+    $edit = [
       'url' => $this->randomString(),
       'form_token' => 'invalid token',
-    );
+    ];
     $this->drupalPostForm(Url::fromRoute('form_test.url'), $edit, 'Submit');
     $this->assertFieldByXpath('//div[contains(@class, "error")]', NULL, 'Error message is displayed with invalid token even when required fields are filled.');
     $this->assertText('The form has become outdated. Copy any unsaved work in the form below');
@@ -314,7 +314,7 @@ public function testGetFormsCsrfToken() {
    */
   function testRequiredTextfieldNoTitle() {
     // Attempt to submit the form with no required field set.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('form-test/validate-required-no-title', $edit, 'Submit');
     $this->assertNoRaw("The form_test_validate_required_form_no_title form was submitted successfully.", 'Validation form submitted successfully.');
 
@@ -326,9 +326,9 @@ function testRequiredTextfieldNoTitle() {
 
     // Submit again with required fields set and verify that there are no
     // error messages.
-    $edit = array(
+    $edit = [
       'textfield' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Submit');
     $this->assertNoFieldByXpath('//input[contains(@class, "error")]', FALSE, 'No error input form element class found.');
     $this->assertRaw("The form_test_validate_required_form_no_title form was submitted successfully.", 'Validation form submitted successfully.');
@@ -341,26 +341,26 @@ function testRequiredTextfieldNoTitle() {
    */
   function testCheckboxProcessing() {
     // First, try to submit without the required checkbox.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('form-test/checkbox', $edit, t('Submit'));
-    $this->assertRaw(t('@name field is required.', array('@name' => 'required_checkbox')), 'A required checkbox is actually mandatory');
+    $this->assertRaw(t('@name field is required.', ['@name' => 'required_checkbox']), 'A required checkbox is actually mandatory');
 
     // Now try to submit the form correctly.
-    $values = Json::decode($this->drupalPostForm(NULL, array('required_checkbox' => 1), t('Submit')));
-    $expected_values = array(
+    $values = Json::decode($this->drupalPostForm(NULL, ['required_checkbox' => 1], t('Submit')));
+    $expected_values = [
       'disabled_checkbox_on' => 'disabled_checkbox_on',
       'disabled_checkbox_off' => '',
       'checkbox_on' => 'checkbox_on',
       'checkbox_off' => '',
       'zero_checkbox_on' => '0',
       'zero_checkbox_off' => '',
-    );
+    ];
     foreach ($expected_values as $widget => $expected_value) {
-      $this->assertEqual($values[$widget], $expected_value, format_string('Checkbox %widget returns expected value (expected: %expected, got: %value)', array(
+      $this->assertEqual($values[$widget], $expected_value, format_string('Checkbox %widget returns expected value (expected: %expected, got: %value)', [
         '%widget' => var_export($widget, TRUE),
         '%expected' => var_export($expected_value, TRUE),
         '%value' => var_export($values[$widget], TRUE),
-      )));
+      ]));
     }
   }
 
@@ -376,8 +376,8 @@ function testSelect() {
     $this->assertNoRaw('<strong>four</strong>');
 
     // Posting without any values should throw validation errors.
-    $this->drupalPostForm(NULL, array(), 'Submit');
-    $no_errors = array(
+    $this->drupalPostForm(NULL, [], 'Submit');
+    $no_errors = [
         'select',
         'select_required',
         'select_optional',
@@ -388,35 +388,35 @@ function testSelect() {
         'no_default_empty_value_optional',
         'multiple',
         'multiple_no_default',
-    );
+    ];
     foreach ($no_errors as $key) {
-      $this->assertNoText(t('@name field is required.', array('@name' => $form[$key]['#title'])));
+      $this->assertNoText(t('@name field is required.', ['@name' => $form[$key]['#title']]));
     }
 
-    $expected_errors = array(
+    $expected_errors = [
         'no_default',
         'no_default_empty_option',
         'no_default_empty_value',
         'no_default_empty_value_one',
         'multiple_no_default_required',
-    );
+    ];
     foreach ($expected_errors as $key) {
-      $this->assertText(t('@name field is required.', array('@name' => $form[$key]['#title'])));
+      $this->assertText(t('@name field is required.', ['@name' => $form[$key]['#title']]));
     }
 
     // Post values for required fields.
-    $edit = array(
+    $edit = [
       'no_default' => 'three',
       'no_default_empty_option' => 'three',
       'no_default_empty_value' => 'three',
       'no_default_empty_value_one' => 'three',
       'multiple_no_default_required[]' => 'three',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Submit');
     $values = Json::decode($this->getRawContent());
 
     // Verify expected values.
-    $expected = array(
+    $expected = [
       'select' => 'one',
       'empty_value' => 'one',
       'empty_value_one' => 'one',
@@ -428,16 +428,16 @@ function testSelect() {
       'no_default_empty_value' => 'three',
       'no_default_empty_value_one' => 'three',
       'no_default_empty_value_optional' => 0,
-      'multiple' => array('two' => 'two'),
-      'multiple_no_default' => array(),
-      'multiple_no_default_required' => array('three' => 'three'),
-    );
+      'multiple' => ['two' => 'two'],
+      'multiple_no_default' => [],
+      'multiple_no_default_required' => ['three' => 'three'],
+    ];
     foreach ($expected as $key => $value) {
-      $this->assertIdentical($values[$key], $value, format_string('@name: @actual is equal to @expected.', array(
+      $this->assertIdentical($values[$key], $value, format_string('@name: @actual is equal to @expected.', [
         '@name' => $key,
         '@actual' => var_export($values[$key], TRUE),
         '@expected' => var_export($value, TRUE),
-      )));
+      ]));
     }
   }
 
@@ -457,15 +457,15 @@ function testNumber() {
     $form = \Drupal::formBuilder()->getForm('\Drupal\form_test\Form\FormTestNumberForm');
 
     // Array with all the error messages to be checked.
-    $error_messages = array(
+    $error_messages = [
       'no_number' => '%name must be a number.',
       'too_low' => '%name must be higher than or equal to %min.',
       'too_high' => '%name must be lower than or equal to %max.',
       'step_mismatch' => '%name is not a valid number.',
-    );
+    ];
 
     // The expected errors.
-    $expected = array(
+    $expected = [
       'integer_no_number' => 'no_number',
       'integer_no_step' => 0,
       'integer_no_step_step_error' => 'step_mismatch',
@@ -485,20 +485,20 @@ function testNumber() {
       'float_step_hard_no_error' => 0,
       'float_step_hard_error' => 'step_mismatch',
       'float_step_any_no_error' => 0,
-    );
+    ];
 
     // First test the number element type, then range.
-    foreach (array('form-test/number', 'form-test/number/range') as $path) {
+    foreach (['form-test/number', 'form-test/number/range'] as $path) {
       // Post form and show errors.
-      $this->drupalPostForm($path, array(), 'Submit');
+      $this->drupalPostForm($path, [], 'Submit');
 
       foreach ($expected as $element => $error) {
         // Create placeholder array.
-        $placeholders = array(
+        $placeholders = [
           '%name' => $form[$element]['#title'],
           '%min' => isset($form[$element]['#min']) ? $form[$element]['#min'] : '0',
           '%max' => isset($form[$element]['#max']) ? $form[$element]['#max'] : '0',
-        );
+        ];
 
         foreach ($error_messages as $id => $message) {
           // Check if the error exists on the page, if the current message ID is
@@ -518,13 +518,13 @@ function testNumber() {
    * Tests default value handling of #type 'range' elements.
    */
   function testRange() {
-    $values = json_decode($this->drupalPostForm('form-test/range', array(), 'Submit'));
+    $values = json_decode($this->drupalPostForm('form-test/range', [], 'Submit'));
     $this->assertEqual($values->with_default_value, 18);
     $this->assertEqual($values->float, 10.5);
     $this->assertEqual($values->integer, 6);
     $this->assertEqual($values->offset, 6.9);
 
-    $this->drupalPostForm('form-test/range/invalid', array(), 'Submit');
+    $this->drupalPostForm('form-test/range/invalid', [], 'Submit');
     $this->assertFieldByXPath('//input[@type="range" and contains(@class, "error")]', NULL, 'Range element has the error class.');
   }
 
@@ -533,7 +533,7 @@ function testRange() {
    */
   function testColorValidation() {
     // Keys are inputs, values are expected results.
-    $values = array(
+    $values = [
       '' => '#000000',
       '#000' => '#000000',
       'AAA' => '#aaaaaa',
@@ -541,25 +541,25 @@ function testColorValidation() {
       '#99ccBc' => '#99ccbc',
       '#aabbcc' => '#aabbcc',
       '123456' => '#123456',
-    );
+    ];
 
     // Tests that valid values are properly normalized.
     foreach ($values as $input => $expected) {
-      $edit = array(
+      $edit = [
         'color' => $input,
-      );
+      ];
       $result = json_decode($this->drupalPostForm('form-test/color', $edit, 'Submit'));
       $this->assertEqual($result->color, $expected);
     }
 
     // Tests invalid values are rejected.
-    $values = array('#0008', '#1234', '#fffffg', '#abcdef22', '17', '#uaa');
+    $values = ['#0008', '#1234', '#fffffg', '#abcdef22', '17', '#uaa'];
     foreach ($values as $input) {
-      $edit = array(
+      $edit = [
         'color' => $input,
-      );
+      ];
       $this->drupalPostForm('form-test/color', $edit, 'Submit');
-      $this->assertRaw(t('%name must be a valid color.', array('%name' => 'Color')));
+      $this->assertRaw(t('%name must be a valid color.', ['%name' => 'Color']));
     }
   }
 
@@ -571,11 +571,11 @@ function testColorValidation() {
   function testDisabledElements() {
     // Get the raw form in its original state.
     $form_state = new FormState();
-    $form = (new FormTestDisabledElementsForm())->buildForm(array(), $form_state);
+    $form = (new FormTestDisabledElementsForm())->buildForm([], $form_state);
 
     // Build a submission that tries to hijack the form by submitting input for
     // elements that are disabled.
-    $edit = array();
+    $edit = [];
     foreach (Element::children($form) as $key) {
       if (isset($form[$key]['#test_hijack_value'])) {
         if (is_array($form[$key]['#test_hijack_value'])) {
@@ -591,14 +591,14 @@ function testDisabledElements() {
 
     // Submit the form with no input, as the browser does for disabled elements,
     // and fetch the $form_state->getValues() that is passed to the submit handler.
-    $this->drupalPostForm('form-test/disabled-elements', array(), t('Submit'));
+    $this->drupalPostForm('form-test/disabled-elements', [], t('Submit'));
     $returned_values['normal'] = Json::decode($this->content);
 
     // Do the same with input, as could happen if JavaScript un-disables an
     // element. drupalPostForm() emulates a browser by not submitting input for
     // disabled elements, so we need to un-disable those elements first.
     $this->drupalGet('form-test/disabled-elements');
-    $disabled_elements = array();
+    $disabled_elements = [];
     foreach ($this->xpath('//*[@disabled]') as $element) {
       $disabled_elements[] = (string) $element['name'];
       unset($element['disabled']);
@@ -608,10 +608,10 @@ function testDisabledElements() {
     // the disabled container.
     $actual_count = count($disabled_elements);
     $expected_count = 42;
-    $this->assertEqual($actual_count, $expected_count, SafeMarkup::format('Found @actual elements with disabled property (expected @expected).', array(
+    $this->assertEqual($actual_count, $expected_count, SafeMarkup::format('Found @actual elements with disabled property (expected @expected).', [
       '@actual' => count($disabled_elements),
       '@expected' => $expected_count,
-    )));
+    ]));
 
     $this->drupalPostForm(NULL, $edit, t('Submit'));
     $returned_values['hijacked'] = Json::decode($this->content);
@@ -640,7 +640,7 @@ function assertFormValuesDefault($values, $form) {
           // Checkboxes values are not filtered out.
           $values[$key] = array_filter($values[$key]);
         }
-        $this->assertIdentical($expected_value, $values[$key], format_string('Default value for %type: expected %expected, returned %returned.', array('%type' => $key, '%expected' => var_export($expected_value, TRUE), '%returned' => var_export($values[$key], TRUE))));
+        $this->assertIdentical($expected_value, $values[$key], format_string('Default value for %type: expected %expected, returned %returned.', ['%type' => $key, '%expected' => var_export($expected_value, TRUE), '%returned' => var_export($values[$key], TRUE)]));
       }
 
       // Recurse children.
@@ -656,24 +656,24 @@ function assertFormValuesDefault($values, $form) {
   function testDisabledMarkup() {
     $this->drupalGet('form-test/disabled-elements');
     $form = \Drupal::formBuilder()->getForm('\Drupal\form_test\Form\FormTestDisabledElementsForm');
-    $type_map = array(
+    $type_map = [
       'textarea' => 'textarea',
       'select' => 'select',
       'weight' => 'select',
       'datetime' => 'datetime',
-    );
+    ];
 
     foreach ($form as $name => $item) {
       // Skip special #types.
-      if (!isset($item['#type']) || in_array($item['#type'], array('hidden', 'text_format'))) {
+      if (!isset($item['#type']) || in_array($item['#type'], ['hidden', 'text_format'])) {
         continue;
       }
       // Setup XPath and CSS class depending on #type.
-      if (in_array($item['#type'], array('button', 'submit'))) {
+      if (in_array($item['#type'], ['button', 'submit'])) {
         $path = "//!type[contains(@class, :div-class) and @value=:value]";
         $class = 'is-disabled';
       }
-      elseif (in_array($item['#type'], array('image_button'))) {
+      elseif (in_array($item['#type'], ['image_button'])) {
         $path = "//!type[contains(@class, :div-class) and @value=:value]";
         $class = 'is-disabled';
       }
@@ -687,27 +687,27 @@ function testDisabledMarkup() {
       if (isset($type_map[$item['#type']])) {
         $type = $type_map[$item['#type']];
       }
-      $path = strtr($path, array('!type' => $type));
+      $path = strtr($path, ['!type' => $type]);
       // Verify that the element exists.
-      $element = $this->xpath($path, array(
+      $element = $this->xpath($path, [
         ':name' => Html::escape($name),
         ':div-class' => $class,
         ':value' => isset($item['#value']) ? $item['#value'] : '',
-      ));
-      $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', array('%type' => $item['#type'])));
+      ]);
+      $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', ['%type' => $item['#type']]));
     }
 
     // Verify special element #type text-format.
-    $element = $this->xpath('//div[contains(@class, :div-class)]/descendant::textarea[@name=:name]', array(
+    $element = $this->xpath('//div[contains(@class, :div-class)]/descendant::textarea[@name=:name]', [
       ':name' => 'text_format[value]',
       ':div-class' => 'form-disabled',
-    ));
-    $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', array('%type' => 'text_format[value]')));
-    $element = $this->xpath('//div[contains(@class, :div-class)]/descendant::select[@name=:name]', array(
+    ]);
+    $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', ['%type' => 'text_format[value]']));
+    $element = $this->xpath('//div[contains(@class, :div-class)]/descendant::select[@name=:name]', [
       ':name' => 'text_format[format]',
       ':div-class' => 'form-disabled',
-    ));
-    $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', array('%type' => 'text_format[format]')));
+    ]);
+    $this->assertTrue(isset($element[0]), format_string('Disabled form element class found for #type %type.', ['%type' => 'text_format[format]']));
   }
 
   /**
@@ -719,7 +719,7 @@ function testInputForgery() {
     $this->drupalGet('form-test/input-forgery');
     $checkbox = $this->xpath('//input[@name="checkboxes[two]"]');
     $checkbox[0]['value'] = 'FORGERY';
-    $this->drupalPostForm(NULL, array('checkboxes[one]' => TRUE, 'checkboxes[two]' => TRUE), t('Submit'));
+    $this->drupalPostForm(NULL, ['checkboxes[one]' => TRUE, 'checkboxes[two]' => TRUE], t('Submit'));
     $this->assertText('An illegal choice has been detected.', 'Input forgery was detected.');
   }
 
@@ -730,19 +730,19 @@ function testRequiredAttribute() {
     $this->drupalGet('form-test/required-attribute');
     $expected = 'required';
     // Test to make sure the elements have the proper required attribute.
-    foreach (array('textfield', 'password') as $type) {
-      $element = $this->xpath('//input[@id=:id and @required=:expected]', array(
+    foreach (['textfield', 'password'] as $type) {
+      $element = $this->xpath('//input[@id=:id and @required=:expected]', [
         ':id' => 'edit-' . $type,
         ':expected' => $expected,
-      ));
-      $this->assertTrue(!empty($element), format_string('The @type has the proper required attribute.', array('@type' => $type)));
+      ]);
+      $this->assertTrue(!empty($element), format_string('The @type has the proper required attribute.', ['@type' => $type]));
     }
 
     // Test to make sure textarea has the proper required attribute.
-    $element = $this->xpath('//textarea[@id=:id and @required=:expected]', array(
+    $element = $this->xpath('//textarea[@id=:id and @required=:expected]', [
       ':id' => 'edit-textarea',
       ':expected' => $expected,
-    ));
+    ]);
     $this->assertTrue(!empty($element), 'The textarea has the proper required attribute.');
   }
 
diff --git a/core/modules/system/src/Tests/Form/LanguageSelectElementTest.php b/core/modules/system/src/Tests/Form/LanguageSelectElementTest.php
index 7b3d73cb0f4a53d826a871f3a20aa204189c7529..d52eab49b13e8a45ec713667653da408ca6b0ffe 100644
--- a/core/modules/system/src/Tests/Form/LanguageSelectElementTest.php
+++ b/core/modules/system/src/Tests/Form/LanguageSelectElementTest.php
@@ -20,47 +20,47 @@ class LanguageSelectElementTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test', 'language');
+  public static $modules = ['form_test', 'language'];
 
   /**
    * Tests that the options printed by the language select element are correct.
    */
   function testLanguageSelectElementOptions() {
     // Add some languages.
-    ConfigurableLanguage::create(array(
+    ConfigurableLanguage::create([
       'id' => 'aaa',
       'label' => $this->randomMachineName(),
-    ))->save();
+    ])->save();
 
-    ConfigurableLanguage::create(array(
+    ConfigurableLanguage::create([
       'id' => 'bbb',
       'label' => $this->randomMachineName(),
-    ))->save();
+    ])->save();
 
     \Drupal::languageManager()->reset();
 
     $this->drupalGet('form-test/language_select');
     // Check that the language fields were rendered on the page.
-    $ids = array(
+    $ids = [
         'edit-languages-all' => LanguageInterface::STATE_ALL,
         'edit-languages-configurable' => LanguageInterface::STATE_CONFIGURABLE,
         'edit-languages-locked' => LanguageInterface::STATE_LOCKED,
         'edit-languages-config-and-locked' => LanguageInterface::STATE_CONFIGURABLE | LanguageInterface::STATE_LOCKED
-    );
+    ];
     foreach ($ids as $id => $flags) {
-      $this->assertField($id, format_string('The @id field was found on the page.', array('@id' => $id)));
-      $options = array();
+      $this->assertField($id, format_string('The @id field was found on the page.', ['@id' => $id]));
+      $options = [];
       /* @var $language_manager \Drupal\Core\Language\LanguageManagerInterface */
       $language_manager = $this->container->get('language_manager');
       foreach ($language_manager->getLanguages($flags) as $langcode => $language) {
-        $options[$langcode] = $language->isLocked() ? t('- @name -', array('@name' => $language->getName())) : $language->getName();
+        $options[$langcode] = $language->isLocked() ? t('- @name -', ['@name' => $language->getName()]) : $language->getName();
       }
       $this->_testLanguageSelectElementOptions($id, $options);
     }
 
     // Test that the #options were not altered by #languages.
-    $this->assertField('edit-language-custom-options', format_string('The @id field was found on the page.', array('@id' => 'edit-language-custom-options')));
-    $this->_testLanguageSelectElementOptions('edit-language-custom-options', array('opt1' => 'First option', 'opt2' => 'Second option', 'opt3' => 'Third option'));
+    $this->assertField('edit-language-custom-options', format_string('The @id field was found on the page.', ['@id' => 'edit-language-custom-options']));
+    $this->_testLanguageSelectElementOptions('edit-language-custom-options', ['opt1' => 'First option', 'opt2' => 'Second option', 'opt3' => 'Third option']);
   }
 
   /**
@@ -71,17 +71,17 @@ function testLanguageSelectElementOptions() {
   function testHiddenLanguageSelectElement() {
     // Disable the language module, so that the language select field will not
     // be rendered.
-    $this->container->get('module_installer')->uninstall(array('language'));
+    $this->container->get('module_installer')->uninstall(['language']);
     $this->drupalGet('form-test/language_select');
     // Check that the language fields were rendered on the page.
-    $ids = array('edit-languages-all', 'edit-languages-configurable', 'edit-languages-locked', 'edit-languages-config-and-locked');
+    $ids = ['edit-languages-all', 'edit-languages-configurable', 'edit-languages-locked', 'edit-languages-config-and-locked'];
     foreach ($ids as $id) {
-      $this->assertNoField($id, format_string('The @id field was not found on the page.', array('@id' => $id)));
+      $this->assertNoField($id, format_string('The @id field was not found on the page.', ['@id' => $id]));
     }
 
     // Check that the submitted values were the default values of the language
     // field elements.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm(NULL, $edit, t('Submit'));
     $values = Json::decode($this->getRawContent());
     $this->assertEqual($values['languages_all'], 'xx');
@@ -111,7 +111,7 @@ protected function _testLanguageSelectElementOptions($id, $options) {
       $this->assertEqual((string) $option, $option_title);
       next($options);
     }
-    $this->assertEqual($count, count($options), format_string('The number of languages and the number of options shown by the language element are the same: @languages languages, @number options', array('@languages' => count($options), '@number' => $count)));
+    $this->assertEqual($count, count($options), format_string('The number of languages and the number of options shown by the language element are the same: @languages languages, @number options', ['@languages' => count($options), '@number' => $count]));
   }
 
 }
diff --git a/core/modules/system/src/Tests/Form/ProgrammaticTest.php b/core/modules/system/src/Tests/Form/ProgrammaticTest.php
index 5fbefb5e5820f8bcbbf52659338d51678e91ee16..5f6eac07ac41d35551e0d22a1992c343fcf10d2c 100644
--- a/core/modules/system/src/Tests/Form/ProgrammaticTest.php
+++ b/core/modules/system/src/Tests/Form/ProgrammaticTest.php
@@ -17,7 +17,7 @@ class ProgrammaticTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Test the programmatic form submission workflow.
@@ -26,30 +26,30 @@ function testSubmissionWorkflow() {
     // Backup the current batch status and reset it to avoid conflicts while
     // processing the dummy form submit handler.
     $current_batch = $batch =& batch_get();
-    $batch = array();
+    $batch = [];
 
     // Test that a programmatic form submission is rejected when a required
     // textfield is omitted and correctly processed when it is provided.
-    $this->submitForm(array(), FALSE);
-    $this->submitForm(array('textfield' => 'test 1'), TRUE);
-    $this->submitForm(array(), FALSE);
-    $this->submitForm(array('textfield' => 'test 2'), TRUE);
+    $this->submitForm([], FALSE);
+    $this->submitForm(['textfield' => 'test 1'], TRUE);
+    $this->submitForm([], FALSE);
+    $this->submitForm(['textfield' => 'test 2'], TRUE);
 
     // Test that a programmatic form submission can turn on and off checkboxes
     // which are, by default, checked.
-    $this->submitForm(array('textfield' => 'dummy value', 'checkboxes' => array(1 => 1, 2 => 2)), TRUE);
-    $this->submitForm(array('textfield' => 'dummy value', 'checkboxes' => array(1 => 1, 2 => NULL)), TRUE);
-    $this->submitForm(array('textfield' => 'dummy value', 'checkboxes' => array(1 => NULL, 2 => 2)), TRUE);
-    $this->submitForm(array('textfield' => 'dummy value', 'checkboxes' => array(1 => NULL, 2 => NULL)), TRUE);
+    $this->submitForm(['textfield' => 'dummy value', 'checkboxes' => [1 => 1, 2 => 2]], TRUE);
+    $this->submitForm(['textfield' => 'dummy value', 'checkboxes' => [1 => 1, 2 => NULL]], TRUE);
+    $this->submitForm(['textfield' => 'dummy value', 'checkboxes' => [1 => NULL, 2 => 2]], TRUE);
+    $this->submitForm(['textfield' => 'dummy value', 'checkboxes' => [1 => NULL, 2 => NULL]], TRUE);
 
     // Test that a programmatic form submission can correctly click a button
     // that limits validation errors based on user input. Since we do not
     // submit any values for "textfield" here and the textfield is required, we
     // only expect form validation to pass when validation is limited to a
     // different field.
-    $this->submitForm(array('op' => 'Submit with limited validation', 'field_to_validate' => 'all'), FALSE);
-    $this->submitForm(array('op' => 'Submit with limited validation', 'field_to_validate' => 'textfield'), FALSE);
-    $this->submitForm(array('op' => 'Submit with limited validation', 'field_to_validate' => 'field_to_validate'), TRUE);
+    $this->submitForm(['op' => 'Submit with limited validation', 'field_to_validate' => 'all'], FALSE);
+    $this->submitForm(['op' => 'Submit with limited validation', 'field_to_validate' => 'textfield'], FALSE);
+    $this->submitForm(['op' => 'Submit with limited validation', 'field_to_validate' => 'field_to_validate'], TRUE);
 
     // Restore the current batch status.
     $batch = $current_batch;
@@ -73,10 +73,10 @@ private function submitForm($values, $valid_input) {
     // Check that the form returns an error when expected, and vice versa.
     $errors = $form_state->getErrors();
     $valid_form = empty($errors);
-    $args = array(
+    $args = [
       '%values' => print_r($values, TRUE),
       '%errors' => $valid_form ? t('None') : implode(' ', $errors),
-    );
+    ];
     $this->assertTrue($valid_input == $valid_form, format_string('Input values: %values<br />Validation handler errors: %errors', $args));
 
     // We check submitted values only if we have a valid input.
@@ -84,7 +84,7 @@ private function submitForm($values, $valid_input) {
       // Fetching the values that were set in the submission handler.
       $stored_values = $form_state->get('programmatic_form_submit');
       foreach ($values as $key => $value) {
-        $this->assertEqual($stored_values[$key], $value, format_string('Submission handler correctly executed: %stored_key is %stored_value', array('%stored_key' => $key, '%stored_value' => print_r($value, TRUE))));
+        $this->assertEqual($stored_values[$key], $value, format_string('Submission handler correctly executed: %stored_key is %stored_value', ['%stored_key' => $key, '%stored_value' => print_r($value, TRUE)]));
       }
     }
   }
diff --git a/core/modules/system/src/Tests/Form/RebuildTest.php b/core/modules/system/src/Tests/Form/RebuildTest.php
index bee15fe1d7c158729e019bc395cc4fb3a12b0208..e759ff6c540f205cf21a44dabdac594567659e08 100644
--- a/core/modules/system/src/Tests/Form/RebuildTest.php
+++ b/core/modules/system/src/Tests/Form/RebuildTest.php
@@ -21,7 +21,7 @@ class RebuildTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'form_test');
+  public static $modules = ['node', 'form_test'];
 
   /**
    * A user for testing.
@@ -33,9 +33,9 @@ class RebuildTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
-    $this->webUser = $this->drupalCreateUser(array('access content'));
+    $this->webUser = $this->drupalCreateUser(['access content']);
     $this->drupalLogin($this->webUser);
   }
 
@@ -43,11 +43,11 @@ protected function setUp() {
    * Tests preservation of values.
    */
   function testRebuildPreservesValues() {
-    $edit = array(
+    $edit = [
       'checkbox_1_default_off' => TRUE,
       'checkbox_1_default_on' => FALSE,
       'text_1' => 'foo',
-    );
+    ];
     $this->drupalPostForm('form-test/form-rebuild-preserve-values', $edit, 'Add more');
 
     // Verify that initial elements retained their submitted values.
@@ -70,30 +70,30 @@ function testRebuildPreservesValues() {
   function testPreserveFormActionAfterAJAX() {
     // Create a multi-valued field for 'page' nodes to use for Ajax testing.
     $field_name = 'field_ajax_test';
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'type' => 'text',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'node',
       'bundle' => 'page',
     ])->save();
     entity_get_form_display('node', 'page', 'default')
-      ->setComponent($field_name, array('type' => 'text_textfield'))
+      ->setComponent($field_name, ['type' => 'text_textfield'])
       ->save();
 
     // Log in a user who can create 'page' nodes.
-    $this->webUser = $this->drupalCreateUser(array('create page content'));
+    $this->webUser = $this->drupalCreateUser(['create page content']);
     $this->drupalLogin($this->webUser);
 
     // Get the form for adding a 'page' node. Submit an "add another item" Ajax
     // submission and verify it worked by ensuring the updated page has two text
     // field items in the field for which we just added an item.
     $this->drupalGet('node/add/page');
-    $this->drupalPostAjaxForm(NULL, array(), array('field_ajax_test_add_more' => t('Add another item')), NULL, array(), array(), 'node-page-form');
+    $this->drupalPostAjaxForm(NULL, [], ['field_ajax_test_add_more' => t('Add another item')], NULL, [], [], 'node-page-form');
     $this->assert(count($this->xpath('//div[contains(@class, "field--name-field-ajax-test")]//input[@type="text"]')) == 2, 'AJAX submission succeeded.');
 
     // Submit the form with the non-Ajax "Save" button, leaving the title field
@@ -101,7 +101,7 @@ function testPreserveFormActionAfterAJAX() {
     // occurred, because this test is for testing what happens when a form is
     // re-rendered without being re-built, which is what happens when there's
     // a validation error.
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $this->assertText('Title field is required.', 'Non-AJAX submission correctly triggered a validation error.');
 
     // Ensure that the form contains two items in the multi-valued field, so we
diff --git a/core/modules/system/src/Tests/Form/ResponseTest.php b/core/modules/system/src/Tests/Form/ResponseTest.php
index 658b6726718bbc5be3deec311f193b38e0e299f9..e3064a5511aac3c680f195652328feeb55cf731d 100644
--- a/core/modules/system/src/Tests/Form/ResponseTest.php
+++ b/core/modules/system/src/Tests/Form/ResponseTest.php
@@ -17,7 +17,7 @@ class ResponseTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Tests that enforced responses propagate through subscribers and middleware.
diff --git a/core/modules/system/src/Tests/Form/StateValuesCleanAdvancedTest.php b/core/modules/system/src/Tests/Form/StateValuesCleanAdvancedTest.php
index eb53244a900351d8a52b9a9ca9b152b73e9f40da..39fed3bea3ad948be11a2ec0e42604ae65ff614b 100644
--- a/core/modules/system/src/Tests/Form/StateValuesCleanAdvancedTest.php
+++ b/core/modules/system/src/Tests/Form/StateValuesCleanAdvancedTest.php
@@ -18,7 +18,7 @@ class StateValuesCleanAdvancedTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('file', 'form_test');
+  public static $modules = ['file', 'form_test'];
 
   /**
    * An image file path for uploading.
@@ -38,7 +38,7 @@ function testFormStateValuesCleanAdvanced() {
     $this->assertTrue(is_file($this->image->uri), "The image file we're going to upload exists.");
 
     // "Browse" for the desired file.
-    $edit = array('files[image]' => drupal_realpath($this->image->uri));
+    $edit = ['files[image]' => drupal_realpath($this->image->uri)];
 
     // Post the form.
     $this->drupalPostForm('form_test/form-state-values-clean-advanced', $edit, t('Submit'));
diff --git a/core/modules/system/src/Tests/Form/StateValuesCleanTest.php b/core/modules/system/src/Tests/Form/StateValuesCleanTest.php
index 7761bd8ad06f338897226a84f9e925d77adec05f..4e1da6143253103a9f39a8a08c48dae8944778ff 100644
--- a/core/modules/system/src/Tests/Form/StateValuesCleanTest.php
+++ b/core/modules/system/src/Tests/Form/StateValuesCleanTest.php
@@ -19,31 +19,31 @@ class StateValuesCleanTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Tests \Drupal\Core\Form\FormState::cleanValues().
    */
   function testFormStateValuesClean() {
-    $values = Json::decode($this->drupalPostForm('form_test/form-state-values-clean', array(), t('Submit')));
+    $values = Json::decode($this->drupalPostForm('form_test/form-state-values-clean', [], t('Submit')));
 
     // Setup the expected result.
-    $result = array(
+    $result = [
       'beer' => 1000,
-      'baz' => array('beer' => 2000),
-    );
+      'baz' => ['beer' => 2000],
+    ];
 
     // Verify that all internal Form API elements were removed.
-    $this->assertFalse(isset($values['form_id']), format_string('%element was removed.', array('%element' => 'form_id')));
-    $this->assertFalse(isset($values['form_token']), format_string('%element was removed.', array('%element' => 'form_token')));
-    $this->assertFalse(isset($values['form_build_id']), format_string('%element was removed.', array('%element' => 'form_build_id')));
-    $this->assertFalse(isset($values['op']), format_string('%element was removed.', array('%element' => 'op')));
+    $this->assertFalse(isset($values['form_id']), format_string('%element was removed.', ['%element' => 'form_id']));
+    $this->assertFalse(isset($values['form_token']), format_string('%element was removed.', ['%element' => 'form_token']));
+    $this->assertFalse(isset($values['form_build_id']), format_string('%element was removed.', ['%element' => 'form_build_id']));
+    $this->assertFalse(isset($values['op']), format_string('%element was removed.', ['%element' => 'op']));
 
     // Verify that all buttons were removed.
-    $this->assertFalse(isset($values['foo']), format_string('%element was removed.', array('%element' => 'foo')));
-    $this->assertFalse(isset($values['bar']), format_string('%element was removed.', array('%element' => 'bar')));
-    $this->assertFalse(isset($values['baz']['foo']), format_string('%element was removed.', array('%element' => 'foo')));
-    $this->assertFalse(isset($values['baz']['baz']), format_string('%element was removed.', array('%element' => 'baz')));
+    $this->assertFalse(isset($values['foo']), format_string('%element was removed.', ['%element' => 'foo']));
+    $this->assertFalse(isset($values['bar']), format_string('%element was removed.', ['%element' => 'bar']));
+    $this->assertFalse(isset($values['baz']['foo']), format_string('%element was removed.', ['%element' => 'foo']));
+    $this->assertFalse(isset($values['baz']['baz']), format_string('%element was removed.', ['%element' => 'baz']));
 
     // Verify values manually added for cleaning were removed.
     $this->assertFalse(isset($values['wine']), SafeMarkup::format('%element was removed.', ['%element' => 'wine']));
diff --git a/core/modules/system/src/Tests/Form/StorageTest.php b/core/modules/system/src/Tests/Form/StorageTest.php
index d29f36b6141af5fdb658d0076b1d004a0a774a96..4d6f3a73d595cc6c6a3182a55d6cceedc6b3aaea 100644
--- a/core/modules/system/src/Tests/Form/StorageTest.php
+++ b/core/modules/system/src/Tests/Form/StorageTest.php
@@ -23,7 +23,7 @@ class StorageTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test', 'dblog');
+  public static $modules = ['form_test', 'dblog'];
 
   protected function setUp() {
     parent::setUp();
@@ -38,7 +38,7 @@ function testForm() {
     $this->drupalGet('form_test/form-storage');
     $this->assertText('Form constructions: 1');
 
-    $edit = array('title' => 'new', 'value' => 'value_is_set');
+    $edit = ['title' => 'new', 'value' => 'value_is_set'];
 
     // Use form rebuilding triggered by a submit button.
     $this->drupalPostForm(NULL, $edit, 'Continue submit');
@@ -47,7 +47,7 @@ function testForm() {
 
     // Reset the form to the values of the storage, using a form rebuild
     // triggered by button of type button.
-    $this->drupalPostForm(NULL, array('title' => 'changed'), 'Reset');
+    $this->drupalPostForm(NULL, ['title' => 'changed'], 'Reset');
     $this->assertFieldByName('title', 'new', 'Values have been reset.');
     // After rebuilding, the form has been cached.
     $this->assertText('Form constructions: 4');
@@ -61,10 +61,10 @@ function testForm() {
    * Tests using the form after calling $form_state->setCached().
    */
   function testFormCached() {
-    $this->drupalGet('form_test/form-storage', array('query' => array('cache' => 1)));
+    $this->drupalGet('form_test/form-storage', ['query' => ['cache' => 1]]);
     $this->assertText('Form constructions: 1');
 
-    $edit = array('title' => 'new', 'value' => 'value_is_set');
+    $edit = ['title' => 'new', 'value' => 'value_is_set'];
 
     // Use form rebuilding triggered by a submit button.
     $this->drupalPostForm(NULL, $edit, 'Continue submit');
@@ -75,7 +75,7 @@ function testFormCached() {
 
     // Reset the form to the values of the storage, using a form rebuild
     // triggered by button of type button.
-    $this->drupalPostForm(NULL, array('title' => 'changed'), 'Reset');
+    $this->drupalPostForm(NULL, ['title' => 'changed'], 'Reset');
     $this->assertFieldByName('title', 'new', 'Values have been reset.');
     $this->assertText('Form constructions: 4');
 
@@ -88,7 +88,7 @@ function testFormCached() {
    * Tests validation when form storage is used.
    */
   function testValidation() {
-    $this->drupalPostForm('form_test/form-storage', array('title' => '', 'value' => 'value_is_set'), 'Continue submit');
+    $this->drupalPostForm('form_test/form-storage', ['title' => '', 'value' => 'value_is_set'], 'Continue submit');
     $this->assertPattern('/value_is_set/', 'The input values have been kept.');
   }
 
@@ -104,26 +104,26 @@ function testValidation() {
    */
   function testCachedFormStorageValidation() {
     // Request the form with 'cache' query parameter to enable form caching.
-    $this->drupalGet('form_test/form-storage', array('query' => array('cache' => 1)));
+    $this->drupalGet('form_test/form-storage', ['query' => ['cache' => 1]]);
 
     // Skip step 1 of the multi-step form, since the first step copies over
     // 'title' into form storage, but we want to verify that changes in the form
     // storage are updated in the cache during form validation.
-    $edit = array('title' => 'foo');
+    $edit = ['title' => 'foo'];
     $this->drupalPostForm(NULL, $edit, 'Continue submit');
 
     // In step 2, trigger a validation error for the required 'title' field, and
     // post the special 'change_title' value for the 'value' field, which
     // conditionally invokes the #element_validate handler to update the form
     // storage.
-    $edit = array('title' => '', 'value' => 'change_title');
+    $edit = ['title' => '', 'value' => 'change_title'];
     $this->drupalPostForm(NULL, $edit, 'Save');
 
     // At this point, the form storage should contain updated values, but we do
     // not see them, because the form has not been rebuilt yet due to the
     // validation error. Post again and verify that the rebuilt form contains
     // the values of the updated form storage.
-    $this->drupalPostForm(NULL, array('title' => 'foo', 'value' => 'bar'), 'Save');
+    $this->drupalPostForm(NULL, ['title' => 'foo', 'value' => 'bar'], 'Save');
     $this->assertText("The thing has been changed.", 'The altered form storage value was updated in cache and taken over.');
   }
 
diff --git a/core/modules/system/src/Tests/Form/SystemConfigFormTest.php b/core/modules/system/src/Tests/Form/SystemConfigFormTest.php
index 69a7f7e66b19232efe4fe6f6e768dcadc9bbdc61..88687d90db3fa71cbc69a3e48991a66968f9984b 100644
--- a/core/modules/system/src/Tests/Form/SystemConfigFormTest.php
+++ b/core/modules/system/src/Tests/Form/SystemConfigFormTest.php
@@ -16,16 +16,16 @@ class SystemConfigFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Tests the SystemConfigFormTestBase class.
    */
   function testSystemConfigForm() {
     $this->drupalGet('form-test/system-config-form');
-    $element = $this->xpath('//div[@id = :id]/input[contains(@class, :class)]', array(':id' => 'edit-actions', ':class' => 'button--primary'));
+    $element = $this->xpath('//div[@id = :id]/input[contains(@class, :class)]', [':id' => 'edit-actions', ':class' => 'button--primary']);
     $this->assertTrue($element, 'The primary action submit button was found.');
-    $this->drupalPostForm(NULL, array(), t('Save configuration'));
+    $this->drupalPostForm(NULL, [], t('Save configuration'));
     $this->assertText(t('The configuration options have been saved.'));
   }
 
diff --git a/core/modules/system/src/Tests/Form/TriggeringElementTest.php b/core/modules/system/src/Tests/Form/TriggeringElementTest.php
index 5d8a18082c7f4dc51b58b6851119ed0ad54c18fe..6bd8d2e8b59c316f5f9fdb2da62e608c102946f1 100644
--- a/core/modules/system/src/Tests/Form/TriggeringElementTest.php
+++ b/core/modules/system/src/Tests/Form/TriggeringElementTest.php
@@ -16,7 +16,7 @@ class TriggeringElementTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Test the determination of the triggering element when no button
@@ -25,27 +25,27 @@ class TriggeringElementTest extends WebTestBase {
    */
   function testNoButtonInfoInPost() {
     $path = 'form-test/clicked-button';
-    $edit = array();
+    $edit = [];
     $form_html_id = 'form-test-clicked-button';
 
     // Ensure submitting a form with no buttons results in no triggering element
     // and the form submit handler not running.
-    $this->drupalPostForm($path, $edit, NULL, array(), array(), $form_html_id);
+    $this->drupalPostForm($path, $edit, NULL, [], [], $form_html_id);
     $this->assertText('There is no clicked button.', '$form_state->getTriggeringElement() set to NULL.');
     $this->assertNoText('Submit handler for form_test_clicked_button executed.', 'Form submit handler did not execute.');
 
     // Ensure submitting a form with one or more submit buttons results in the
     // triggering element being set to the first one the user has access to. An
     // argument with 'r' in it indicates a restricted (#access=FALSE) button.
-    $this->drupalPostForm($path . '/s', $edit, NULL, array(), array(), $form_html_id);
+    $this->drupalPostForm($path . '/s', $edit, NULL, [], [], $form_html_id);
     $this->assertText('The clicked button is button1.', '$form_state->getTriggeringElement() set to only button.');
     $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');
 
-    $this->drupalPostForm($path . '/s/s', $edit, NULL, array(), array(), $form_html_id);
+    $this->drupalPostForm($path . '/s/s', $edit, NULL, [], [], $form_html_id);
     $this->assertText('The clicked button is button1.', '$form_state->getTriggeringElement() set to first button.');
     $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');
 
-    $this->drupalPostForm($path . '/rs/s', $edit, NULL, array(), array(), $form_html_id);
+    $this->drupalPostForm($path . '/rs/s', $edit, NULL, [], [], $form_html_id);
     $this->assertText('The clicked button is button2.', '$form_state->getTriggeringElement() set to first available button.');
     $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');
 
@@ -53,15 +53,15 @@ function testNoButtonInfoInPost() {
     // triggering element being set to the first button, regardless of type. For
     // the FAPI 'button' type, this should result in the submit handler not
     // executing. The types are 's'(ubmit), 'b'(utton), and 'i'(mage_button).
-    $this->drupalPostForm($path . '/s/b/i', $edit, NULL, array(), array(), $form_html_id);
+    $this->drupalPostForm($path . '/s/b/i', $edit, NULL, [], [], $form_html_id);
     $this->assertText('The clicked button is button1.', '$form_state->getTriggeringElement() set to first button.');
     $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');
 
-    $this->drupalPostForm($path . '/b/s/i', $edit, NULL, array(), array(), $form_html_id);
+    $this->drupalPostForm($path . '/b/s/i', $edit, NULL, [], [], $form_html_id);
     $this->assertText('The clicked button is button1.', '$form_state->getTriggeringElement() set to first button.');
     $this->assertNoText('Submit handler for form_test_clicked_button executed.', 'Form submit handler did not execute.');
 
-    $this->drupalPostForm($path . '/i/s/b', $edit, NULL, array(), array(), $form_html_id);
+    $this->drupalPostForm($path . '/i/s/b', $edit, NULL, [], [], $form_html_id);
     $this->assertText('The clicked button is button1.', '$form_state->getTriggeringElement() set to first button.');
     $this->assertText('Submit handler for form_test_clicked_button executed.', 'Form submit handler executed.');
   }
@@ -84,7 +84,7 @@ function testAttemptAccessControlBypass() {
     // data we want into \Drupal::request()->request.
     $elements = $this->xpath('//form[@id="' . $form_html_id . '"]//input[@name="text"]');
     $elements[0]['name'] = 'button1';
-    $this->drupalPostForm(NULL, array('button1' => 'button1'), NULL, array(), array(), $form_html_id);
+    $this->drupalPostForm(NULL, ['button1' => 'button1'], NULL, [], [], $form_html_id);
 
     // Ensure that the triggering element was not set to the restricted button.
     // Do this with both a negative and positive assertion, because negative
diff --git a/core/modules/system/src/Tests/Form/UrlTest.php b/core/modules/system/src/Tests/Form/UrlTest.php
index 4bf6f608f37b772c3392ee94b350e192cc9061cf..69452cb397dfb103ab20d03b9799a576fe7b6162 100644
--- a/core/modules/system/src/Tests/Form/UrlTest.php
+++ b/core/modules/system/src/Tests/Form/UrlTest.php
@@ -17,7 +17,7 @@ class UrlTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   protected $profile = 'testing';
 
@@ -25,21 +25,21 @@ class UrlTest extends WebTestBase {
    * Tests that #type 'url' fields are properly validated and trimmed.
    */
   function testFormUrl() {
-    $edit = array();
+    $edit = [];
     $edit['url'] = 'http://';
     $edit['url_required'] = ' ';
     $this->drupalPostForm('form-test/url', $edit, 'Submit');
-    $this->assertRaw(t('The URL %url is not valid.', array('%url' => 'http://')));
-    $this->assertRaw(t('@name field is required.', array('@name' => 'Required URL')));
+    $this->assertRaw(t('The URL %url is not valid.', ['%url' => 'http://']));
+    $this->assertRaw(t('@name field is required.', ['@name' => 'Required URL']));
 
-    $edit = array();
+    $edit = [];
     $edit['url'] = "\n";
     $edit['url_required'] = 'http://example.com/   ';
     $values = Json::decode($this->drupalPostForm('form-test/url', $edit, 'Submit'));
     $this->assertIdentical($values['url'], '');
     $this->assertEqual($values['url_required'], 'http://example.com/');
 
-    $edit = array();
+    $edit = [];
     $edit['url'] = 'http://foo.bar.example.com/';
     $edit['url_required'] = 'https://www.drupal.org/node/1174630?page=0&foo=bar#new';
     $values = Json::decode($this->drupalPostForm('form-test/url', $edit, 'Submit'));
diff --git a/core/modules/system/src/Tests/Form/ValidationTest.php b/core/modules/system/src/Tests/Form/ValidationTest.php
index 35b340b5e42395c3825ed157214c845ee0810db5..46781edd1186f45fe76318b9ba4c8be6615bebdc 100644
--- a/core/modules/system/src/Tests/Form/ValidationTest.php
+++ b/core/modules/system/src/Tests/Form/ValidationTest.php
@@ -17,7 +17,7 @@ class ValidationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Tests #element_validate and #validate.
@@ -26,43 +26,43 @@ function testValidate() {
     $this->drupalGet('form-test/validate');
     // Verify that #element_validate handlers can alter the form and submitted
     // form values.
-    $edit = array(
+    $edit = [
       'name' => 'element_validate',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Save');
     $this->assertFieldByName('name', '#value changed by #element_validate', 'Form element #value was altered.');
     $this->assertText('Name value: value changed by setValueForElement() in #element_validate', 'Form element value in $form_state was altered.');
 
     // Verify that #validate handlers can alter the form and submitted
     // form values.
-    $edit = array(
+    $edit = [
       'name' => 'validate',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Save');
     $this->assertFieldByName('name', '#value changed by #validate', 'Form element #value was altered.');
     $this->assertText('Name value: value changed by setValueForElement() in #validate', 'Form element value in $form_state was altered.');
 
     // Verify that #element_validate handlers can make form elements
     // inaccessible, but values persist.
-    $edit = array(
+    $edit = [
       'name' => 'element_validate_access',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Save');
     $this->assertNoFieldByName('name', 'Form element was hidden.');
     $this->assertText('Name value: element_validate_access', 'Value for inaccessible form element exists.');
 
     // Verify that value for inaccessible form element persists.
-    $this->drupalPostForm(NULL, array(), 'Save');
+    $this->drupalPostForm(NULL, [], 'Save');
     $this->assertNoFieldByName('name', 'Form element was hidden.');
     $this->assertText('Name value: element_validate_access', 'Value for inaccessible form element exists.');
 
     // Verify that #validate handlers don't run if the CSRF token is invalid.
     $this->drupalLogin($this->drupalCreateUser());
     $this->drupalGet('form-test/validate');
-    $edit = array(
+    $edit = [
       'name' => 'validate',
       'form_token' => 'invalid token'
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Save');
     $this->assertNoFieldByName('name', '#value changed by #validate', 'Form element #value was not altered.');
     $this->assertNoText('Name value: value changed by setValueForElement() in #validate', 'Form element value in $form_state was not altered.');
@@ -81,11 +81,11 @@ function testDisabledToken() {
    * Tests partial form validation through #limit_validation_errors.
    */
   function testValidateLimitErrors() {
-    $edit = array(
+    $edit = [
       'test' => 'invalid',
       'test_numeric_index[0]' => 'invalid',
       'test_substring[foo]' => 'invalid',
-    );
+    ];
     $path = 'form-test/limit-validation-errors';
 
     // Render the form, and verify that the buttons with limited server-side
@@ -93,18 +93,18 @@ function testValidateLimitErrors() {
     // client-side validation by the browser).
     $this->drupalGet($path);
     $expected = 'formnovalidate';
-    foreach (array('partial', 'partial-numeric-index', 'substring') as $type) {
-      $element = $this->xpath('//input[@id=:id and @formnovalidate=:expected]', array(
+    foreach (['partial', 'partial-numeric-index', 'substring'] as $type) {
+      $element = $this->xpath('//input[@id=:id and @formnovalidate=:expected]', [
         ':id' => 'edit-' . $type,
         ':expected' => $expected,
-      ));
-      $this->assertTrue(!empty($element), format_string('The @type button has the proper formnovalidate attribute.', array('@type' => $type)));
+      ]);
+      $this->assertTrue(!empty($element), format_string('The @type button has the proper formnovalidate attribute.', ['@type' => $type]));
     }
     // The button with full server-side validation should not have the
     // 'formnovalidate' attribute.
-    $element = $this->xpath('//input[@id=:id and not(@formnovalidate)]', array(
+    $element = $this->xpath('//input[@id=:id and not(@formnovalidate)]', [
       ':id' => 'edit-full',
-    ));
+    ]);
     $this->assertTrue(!empty($element), 'The button with full server-side validation does not have the formnovalidate attribute.');
 
     // Submit the form by pressing the 'Partial validate' button (uses
@@ -112,29 +112,29 @@ function testValidateLimitErrors() {
     // validated, but the #element_validate handler for the 'test' field
     // is triggered.
     $this->drupalPostForm($path, $edit, t('Partial validate'));
-    $this->assertNoText(t('@name field is required.', array('@name' => 'Title')));
+    $this->assertNoText(t('@name field is required.', ['@name' => 'Title']));
     $this->assertText('Test element is invalid');
 
     // Edge case of #limit_validation_errors containing numeric indexes: same
     // thing with the 'Partial validate (numeric index)' button and the
     // 'test_numeric_index' field.
     $this->drupalPostForm($path, $edit, t('Partial validate (numeric index)'));
-    $this->assertNoText(t('@name field is required.', array('@name' => 'Title')));
+    $this->assertNoText(t('@name field is required.', ['@name' => 'Title']));
     $this->assertText('Test (numeric index) element is invalid');
 
     // Ensure something like 'foobar' isn't considered "inside" 'foo'.
     $this->drupalPostForm($path, $edit, t('Partial validate (substring)'));
-    $this->assertNoText(t('@name field is required.', array('@name' => 'Title')));
+    $this->assertNoText(t('@name field is required.', ['@name' => 'Title']));
     $this->assertText('Test (substring) foo element is invalid');
 
     // Ensure not validated values are not available to submit handlers.
-    $this->drupalPostForm($path, array('title' => '', 'test' => 'valid'), t('Partial validate'));
+    $this->drupalPostForm($path, ['title' => '', 'test' => 'valid'], t('Partial validate'));
     $this->assertText('Only validated values appear in the form values.');
 
     // Now test full form validation and ensure that the #element_validate
     // handler is still triggered.
     $this->drupalPostForm($path, $edit, t('Full validate'));
-    $this->assertText(t('@name field is required.', array('@name' => 'Title')));
+    $this->assertText(t('@name field is required.', ['@name' => 'Title']));
     $this->assertText('Test element is invalid');
   }
 
@@ -142,45 +142,45 @@ function testValidateLimitErrors() {
    * Tests #pattern validation.
    */
   function testPatternValidation() {
-    $textfield_error = t('%name field is not in the right format.', array('%name' => 'One digit followed by lowercase letters'));
-    $tel_error = t('%name field is not in the right format.', array('%name' => 'Everything except numbers'));
-    $password_error = t('%name field is not in the right format.', array('%name' => 'Password'));
+    $textfield_error = t('%name field is not in the right format.', ['%name' => 'One digit followed by lowercase letters']);
+    $tel_error = t('%name field is not in the right format.', ['%name' => 'Everything except numbers']);
+    $password_error = t('%name field is not in the right format.', ['%name' => 'Password']);
 
     // Invalid textfield, valid tel.
-    $edit = array(
+    $edit = [
       'textfield' => 'invalid',
       'tel' => 'valid',
-    );
+    ];
     $this->drupalPostForm('form-test/pattern', $edit, 'Submit');
     $this->assertRaw($textfield_error);
     $this->assertNoRaw($tel_error);
     $this->assertNoRaw($password_error);
 
     // Valid textfield, invalid tel, valid password.
-    $edit = array(
+    $edit = [
       'textfield' => '7seven',
       'tel' => '818937',
       'password' => '0100110',
-    );
+    ];
     $this->drupalPostForm('form-test/pattern', $edit, 'Submit');
     $this->assertNoRaw($textfield_error);
     $this->assertRaw($tel_error);
     $this->assertNoRaw($password_error);
 
     // Non required fields are not validated if empty.
-    $edit = array(
+    $edit = [
       'textfield' => '',
       'tel' => '',
-    );
+    ];
     $this->drupalPostForm('form-test/pattern', $edit, 'Submit');
     $this->assertNoRaw($textfield_error);
     $this->assertNoRaw($tel_error);
     $this->assertNoRaw($password_error);
 
     // Invalid password.
-    $edit = array(
+    $edit = [
       'password' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('form-test/pattern', $edit, 'Submit');
     $this->assertNoRaw($textfield_error);
     $this->assertNoRaw($tel_error);
@@ -188,13 +188,13 @@ function testPatternValidation() {
 
     // The pattern attribute overrides #pattern and is not validated on the
     // server side.
-    $edit = array(
+    $edit = [
       'textfield' => '',
       'tel' => '',
       'url' => 'http://www.example.com/',
-    );
+    ];
     $this->drupalPostForm('form-test/pattern', $edit, 'Submit');
-    $this->assertNoRaw(t('%name field is not in the right format.', array('%name' => 'Client side validation')));
+    $this->assertNoRaw(t('%name field is not in the right format.', ['%name' => 'Client side validation']));
   }
 
   /**
@@ -206,36 +206,36 @@ function testCustomRequiredError() {
     $form = \Drupal::formBuilder()->getForm('\Drupal\form_test\Form\FormTestValidateRequiredForm');
 
     // Verify that a custom #required error can be set.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('form-test/validate-required', $edit, 'Submit');
 
     foreach (Element::children($form) as $key) {
       if (isset($form[$key]['#required_error'])) {
-        $this->assertNoText(t('@name field is required.', array('@name' => $form[$key]['#title'])));
+        $this->assertNoText(t('@name field is required.', ['@name' => $form[$key]['#title']]));
         $this->assertText($form[$key]['#required_error']);
       }
       elseif (isset($form[$key]['#form_test_required_error'])) {
-        $this->assertNoText(t('@name field is required.', array('@name' => $form[$key]['#title'])));
+        $this->assertNoText(t('@name field is required.', ['@name' => $form[$key]['#title']]));
         $this->assertText($form[$key]['#form_test_required_error']);
       }
     }
     $this->assertNoText(t('An illegal choice has been detected. Please contact the site administrator.'));
 
     // Verify that no custom validation error appears with valid values.
-    $edit = array(
+    $edit = [
       'textfield' => $this->randomString(),
       'checkboxes[foo]' => TRUE,
       'select' => 'foo',
-    );
+    ];
     $this->drupalPostForm('form-test/validate-required', $edit, 'Submit');
 
     foreach (Element::children($form) as $key) {
       if (isset($form[$key]['#required_error'])) {
-        $this->assertNoText(t('@name field is required.', array('@name' => $form[$key]['#title'])));
+        $this->assertNoText(t('@name field is required.', ['@name' => $form[$key]['#title']]));
         $this->assertNoText($form[$key]['#required_error']);
       }
       elseif (isset($form[$key]['#form_test_required_error'])) {
-        $this->assertNoText(t('@name field is required.', array('@name' => $form[$key]['#title'])));
+        $this->assertNoText(t('@name field is required.', ['@name' => $form[$key]['#title']]));
         $this->assertNoText($form[$key]['#form_test_required_error']);
       }
     }
diff --git a/core/modules/system/src/Tests/Image/ToolkitSetupFormTest.php b/core/modules/system/src/Tests/Image/ToolkitSetupFormTest.php
index 66989de0b57020f7b5a31bd922a5bcbe14e329e9..64b306d562233078e822263d2283a2390262e86e 100644
--- a/core/modules/system/src/Tests/Image/ToolkitSetupFormTest.php
+++ b/core/modules/system/src/Tests/Image/ToolkitSetupFormTest.php
@@ -23,16 +23,16 @@ class ToolkitSetupFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'image_test');
+  public static $modules = ['system', 'image_test'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer site configuration',
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -47,26 +47,26 @@ function testToolkitSetupForm() {
     $this->assertFieldByName('image_toolkit', 'gd', 'The default image toolkit is GD.');
 
     // Test changing the jpeg image quality.
-    $edit = array('gd[image_jpeg_quality]' => '70');
+    $edit = ['gd[image_jpeg_quality]' => '70'];
     $this->drupalPostForm(NULL, $edit, 'Save configuration');
     $this->assertEqual($this->config('system.image.gd')->get('jpeg_quality'), '70');
 
     // Test changing the toolkit.
-    $edit = array('image_toolkit' => 'test');
+    $edit = ['image_toolkit' => 'test'];
     $this->drupalPostForm(NULL, $edit, 'Save configuration');
     $this->assertEqual($this->config('system.image')->get('toolkit'), 'test');
     $this->assertFieldByName('test[test_parameter]', '10');
 
     // Test changing the test toolkit parameter.
-    $edit = array('test[test_parameter]' => '0');
+    $edit = ['test[test_parameter]' => '0'];
     $this->drupalPostForm(NULL, $edit, 'Save configuration');
     $this->assertText(t('Test parameter should be different from 0.'), 'Validation error displayed.');
-    $edit = array('test[test_parameter]' => '20');
+    $edit = ['test[test_parameter]' => '20'];
     $this->drupalPostForm(NULL, $edit, 'Save configuration');
     $this->assertEqual($this->config('system.image.test_toolkit')->get('test_parameter'), '20');
 
     // Test access without the permission 'administer site configuration'.
-    $this->drupalLogin($this->drupalCreateUser(array('access administration pages')));
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages']));
     $this->drupalGet('admin/config/media/image-toolkit');
     $this->assertResponse(403);
   }
diff --git a/core/modules/system/src/Tests/Image/ToolkitTest.php b/core/modules/system/src/Tests/Image/ToolkitTest.php
index 88483238613341824f31b2d2c1502350e96bbc4c..be8e3e3add4f4dd3e9b919864e31f35991e41001 100644
--- a/core/modules/system/src/Tests/Image/ToolkitTest.php
+++ b/core/modules/system/src/Tests/Image/ToolkitTest.php
@@ -18,7 +18,7 @@ function testGetAvailableToolkits() {
     $this->assertTrue(isset($toolkits['test']), 'The working toolkit was returned.');
     $this->assertTrue(isset($toolkits['test:derived_toolkit']), 'The derived toolkit was returned.');
     $this->assertFalse(isset($toolkits['broken']), 'The toolkit marked unavailable was not returned');
-    $this->assertToolkitOperationsCalled(array());
+    $this->assertToolkitOperationsCalled([]);
   }
 
   /**
@@ -28,7 +28,7 @@ function testLoad() {
     $image = $this->getImage();
     $this->assertTrue(is_object($image), 'Returned an object.');
     $this->assertEqual($image->getToolkitId(), 'test', 'Image had toolkit set.');
-    $this->assertToolkitOperationsCalled(array('parseFile'));
+    $this->assertToolkitOperationsCalled(['parseFile']);
   }
 
   /**
@@ -36,18 +36,18 @@ function testLoad() {
    */
   function testSave() {
     $this->assertFalse($this->image->save(), 'Function returned the expected value.');
-    $this->assertToolkitOperationsCalled(array('save'));
+    $this->assertToolkitOperationsCalled(['save']);
   }
 
   /**
    * Test the image_apply() function.
    */
   function testApply() {
-    $data = array('p1' => 1, 'p2' => TRUE, 'p3' => 'text');
+    $data = ['p1' => 1, 'p2' => TRUE, 'p3' => 'text'];
     $this->assertTrue($this->image->apply('my_operation', $data), 'Function returned the expected value.');
 
     // Check that apply was called and with the correct parameters.
-    $this->assertToolkitOperationsCalled(array('apply'));
+    $this->assertToolkitOperationsCalled(['apply']);
     $calls = $this->imageTestGetAllCalls();
     $this->assertEqual($calls['apply'][0][0], 'my_operation', "'my_operation' was passed correctly as operation");
     $this->assertEqual($calls['apply'][0][1]['p1'], 1, 'integer parameter p1 was passed correctly');
@@ -62,10 +62,10 @@ function testApplyNoParameters() {
     $this->assertTrue($this->image->apply('my_operation'), 'Function returned the expected value.');
 
     // Check that apply was called and with the correct parameters.
-    $this->assertToolkitOperationsCalled(array('apply'));
+    $this->assertToolkitOperationsCalled(['apply']);
     $calls = $this->imageTestGetAllCalls();
     $this->assertEqual($calls['apply'][0][0], 'my_operation', "'my_operation' was passed correctly as operation");
-    $this->assertEqual($calls['apply'][0][1], array(), 'passing no parameters was handled correctly');
+    $this->assertEqual($calls['apply'][0][1], [], 'passing no parameters was handled correctly');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Image/ToolkitTestBase.php b/core/modules/system/src/Tests/Image/ToolkitTestBase.php
index 53ede0dc7c83daae1a285237fa5d8237773bffef..af0b253592f13563b16365c916549260757f6d58 100644
--- a/core/modules/system/src/Tests/Image/ToolkitTestBase.php
+++ b/core/modules/system/src/Tests/Image/ToolkitTestBase.php
@@ -15,7 +15,7 @@ abstract class ToolkitTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('image_test');
+  public static $modules = ['image_test'];
 
   /**
    * The URI for the file.
@@ -78,7 +78,7 @@ protected function getImage() {
   function assertToolkitOperationsCalled(array $expected) {
     // If one of the image operations is expected, apply should be expected as
     // well.
-    $operations = array(
+    $operations = [
       'resize',
       'rotate',
       'crop',
@@ -88,7 +88,7 @@ function assertToolkitOperationsCalled(array $expected) {
       'scale_and_crop',
       'my_operation',
       'convert',
-    );
+    ];
     if (count(array_intersect($expected, $operations)) > 0 && !in_array('apply', $expected)) {
       $expected[] = 'apply';
     }
@@ -99,10 +99,10 @@ function assertToolkitOperationsCalled(array $expected) {
     // Determine if there were any expected that were not called.
     $uncalled = array_diff($expected, $actual);
     if (count($uncalled)) {
-      $this->assertTrue(FALSE, SafeMarkup::format('Expected operations %expected to be called but %uncalled was not called.', array('%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled))));
+      $this->assertTrue(FALSE, SafeMarkup::format('Expected operations %expected to be called but %uncalled was not called.', ['%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled)]));
     }
     else {
-      $this->assertTrue(TRUE, SafeMarkup::format('All the expected operations were called: %expected', array('%expected' => implode(', ', $expected))));
+      $this->assertTrue(TRUE, SafeMarkup::format('All the expected operations were called: %expected', ['%expected' => implode(', ', $expected)]));
     }
 
     // Determine if there were any unexpected calls.
@@ -110,7 +110,7 @@ function assertToolkitOperationsCalled(array $expected) {
     // count it as an error.
     $unexpected = array_diff($actual, $expected);
     if (count($unexpected) && (!in_array('apply', $expected) || count(array_intersect($unexpected, $operations)) !== count($unexpected))) {
-      $this->assertTrue(FALSE, SafeMarkup::format('Unexpected operations were called: %unexpected.', array('%unexpected' => implode(', ', $unexpected))));
+      $this->assertTrue(FALSE, SafeMarkup::format('Unexpected operations were called: %unexpected.', ['%unexpected' => implode(', ', $unexpected)]));
     }
     else {
       $this->assertTrue(TRUE, 'No unexpected operations were called.');
@@ -122,20 +122,20 @@ function assertToolkitOperationsCalled(array $expected) {
    */
   function imageTestReset() {
     // Keep track of calls to these operations
-    $results = array(
-      'parseFile' => array(),
-      'save' => array(),
-      'settings' => array(),
-      'apply' => array(),
-      'resize' => array(),
-      'rotate' => array(),
-      'crop' => array(),
-      'desaturate' => array(),
-      'create_new' => array(),
-      'scale' => array(),
-      'scale_and_crop' => array(),
-      'convert' => array(),
-    );
+    $results = [
+      'parseFile' => [],
+      'save' => [],
+      'settings' => [],
+      'apply' => [],
+      'resize' => [],
+      'rotate' => [],
+      'crop' => [],
+      'desaturate' => [],
+      'create_new' => [],
+      'scale' => [],
+      'scale_and_crop' => [],
+      'convert' => [],
+    ];
     \Drupal::state()->set('image_test.results', $results);
   }
 
@@ -148,7 +148,7 @@ function imageTestReset() {
    *   parameters passed to each call.
    */
   function imageTestGetAllCalls() {
-    return \Drupal::state()->get('image_test.results') ?: array();
+    return \Drupal::state()->get('image_test.results') ?: [];
   }
 
 }
diff --git a/core/modules/system/src/Tests/Installer/DistributionProfileTest.php b/core/modules/system/src/Tests/Installer/DistributionProfileTest.php
index 569fe36212c2c98fa553bf9140039ce5fdaee490..e52b0469bbf49848819d3fa5596931cbdc541892 100644
--- a/core/modules/system/src/Tests/Installer/DistributionProfileTest.php
+++ b/core/modules/system/src/Tests/Installer/DistributionProfileTest.php
@@ -21,17 +21,17 @@ class DistributionProfileTest extends InstallerTestBase {
   protected $info;
 
   protected function setUp() {
-    $this->info = array(
+    $this->info = [
       'type' => 'profile',
       'core' => \Drupal::CORE_COMPATIBILITY,
       'name' => 'Distribution profile',
-      'distribution' => array(
+      'distribution' => [
         'name' => 'My Distribution',
-        'install' => array(
+        'install' => [
           'theme' => 'bartik',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     // File API functions are not available yet.
     $path = $this->siteDirectory . '/profiles/mydistro';
     mkdir($path, 0777, TRUE);
diff --git a/core/modules/system/src/Tests/Installer/DistributionProfileTranslationQueryTest.php b/core/modules/system/src/Tests/Installer/DistributionProfileTranslationQueryTest.php
index b8658fbb8ca069537ccb4dcab4fdf9807a2f5bc1..1b6868351d2f172c282ac25f858c150ba10306bf 100644
--- a/core/modules/system/src/Tests/Installer/DistributionProfileTranslationQueryTest.php
+++ b/core/modules/system/src/Tests/Installer/DistributionProfileTranslationQueryTest.php
@@ -30,18 +30,18 @@ class DistributionProfileTranslationQueryTest extends InstallerTestBase {
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->info = array(
+    $this->info = [
       'type' => 'profile',
       'core' => \Drupal::CORE_COMPATIBILITY,
       'name' => 'Distribution profile',
-      'distribution' => array(
+      'distribution' => [
         'name' => 'My Distribution',
         'langcode' => $this->langcode,
-        'install' => array(
+        'install' => [
           'theme' => 'bartik',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     // File API functions are not available yet.
     $path = $this->siteDirectory . '/profiles/mydistro';
     mkdir($path, 0777, TRUE);
diff --git a/core/modules/system/src/Tests/Installer/DistributionProfileTranslationTest.php b/core/modules/system/src/Tests/Installer/DistributionProfileTranslationTest.php
index 29b9b3ccdf90d43a538a2550fc420158370a2500..799affe37bda7c9def90e6d39e39e164bd1c2cce 100644
--- a/core/modules/system/src/Tests/Installer/DistributionProfileTranslationTest.php
+++ b/core/modules/system/src/Tests/Installer/DistributionProfileTranslationTest.php
@@ -30,18 +30,18 @@ class DistributionProfileTranslationTest extends InstallerTestBase {
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->info = array(
+    $this->info = [
       'type' => 'profile',
       'core' => \Drupal::CORE_COMPATIBILITY,
       'name' => 'Distribution profile',
-      'distribution' => array(
+      'distribution' => [
         'name' => 'My Distribution',
         'langcode' => $this->langcode,
-        'install' => array(
+        'install' => [
           'theme' => 'bartik',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     // File API functions are not available yet.
     $path = $this->siteDirectory . '/profiles/mydistro';
     mkdir($path, 0777, TRUE);
diff --git a/core/modules/system/src/Tests/Installer/InstallerConfigDirectorySetNoDirectoryErrorTest.php b/core/modules/system/src/Tests/Installer/InstallerConfigDirectorySetNoDirectoryErrorTest.php
index eb50a0d88b3dd419659761d272768b3349394c6c..2ab980feadd46f45f7ada995edc9437cfd522785 100644
--- a/core/modules/system/src/Tests/Installer/InstallerConfigDirectorySetNoDirectoryErrorTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerConfigDirectorySetNoDirectoryErrorTest.php
@@ -24,10 +24,10 @@ class InstallerConfigDirectorySetNoDirectoryErrorTest extends InstallerTestBase
    */
   protected function setUp() {
     $this->configDirectory = $this->publicFilesDirectory . '/config_' . Crypt::randomBytesBase64();
-    $this->settings['config_directories'][CONFIG_SYNC_DIRECTORY] = (object) array(
+    $this->settings['config_directories'][CONFIG_SYNC_DIRECTORY] = (object) [
       'value' => $this->configDirectory . '/sync',
       'required' => TRUE,
-    );
+    ];
     // Create the files directory early so we can test the error case.
     mkdir($this->publicFilesDirectory);
     // Create a file so the directory can not be created.
diff --git a/core/modules/system/src/Tests/Installer/InstallerConfigDirectorySetNoDirectoryTest.php b/core/modules/system/src/Tests/Installer/InstallerConfigDirectorySetNoDirectoryTest.php
index 4daa45cc4483e8e19f674071c4f70d1475563c21..11febf2d6f0a30007bbf88a589e22a55c5a33bd5 100644
--- a/core/modules/system/src/Tests/Installer/InstallerConfigDirectorySetNoDirectoryTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerConfigDirectorySetNoDirectoryTest.php
@@ -24,15 +24,15 @@ class InstallerConfigDirectorySetNoDirectoryTest extends InstallerTestBase {
    */
   protected function setUp() {
     $this->syncDirectory = $this->publicFilesDirectory . '/config_' . Crypt::randomBytesBase64() . '/sync';
-    $this->settings['config_directories'][CONFIG_SYNC_DIRECTORY] = (object) array(
+    $this->settings['config_directories'][CONFIG_SYNC_DIRECTORY] = (object) [
       'value' => $this->syncDirectory,
       'required' => TRUE,
-    );
+    ];
     // Other directories will be created too.
-    $this->settings['config_directories']['custom'] = (object) array(
+    $this->settings['config_directories']['custom'] = (object) [
       'value' => $this->publicFilesDirectory . '/config_custom',
       'required' => TRUE,
-    );
+    ];
     parent::setUp();
   }
 
diff --git a/core/modules/system/src/Tests/Installer/InstallerExistingConfigDirectoryTest.php b/core/modules/system/src/Tests/Installer/InstallerExistingConfigDirectoryTest.php
index ae6b6069e40318c17ec0bd7ce8fd233651d6f661..b06b4caf6ec348a403c7ef86bdba0aec2b9b53a6 100644
--- a/core/modules/system/src/Tests/Installer/InstallerExistingConfigDirectoryTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerExistingConfigDirectoryTest.php
@@ -24,10 +24,10 @@ class InstallerExistingConfigDirectoryTest extends InstallerTestBase {
   protected function setUp() {
     mkdir($this->siteDirectory . '/config_read_only', 0444);
     $this->expectedFilePerms = fileperms($this->siteDirectory . '/config_read_only');
-    $this->settings['config_directories'][CONFIG_SYNC_DIRECTORY] = (object) array(
+    $this->settings['config_directories'][CONFIG_SYNC_DIRECTORY] = (object) [
       'value' => $this->siteDirectory . '/config_read_only',
       'required' => TRUE,
-    );
+    ];
     parent::setUp();
   }
 
diff --git a/core/modules/system/src/Tests/Installer/InstallerExistingDatabaseSettingsTest.php b/core/modules/system/src/Tests/Installer/InstallerExistingDatabaseSettingsTest.php
index 733f6bc4f227c5692221a88c94f6ffc78ad111a4..63d3ce407a2ce3d8f2b7c57821fbf826d1d893bf 100644
--- a/core/modules/system/src/Tests/Installer/InstallerExistingDatabaseSettingsTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerExistingDatabaseSettingsTest.php
@@ -22,10 +22,10 @@ protected function setUp() {
     unset($connection_info['default']['pdo']);
     unset($connection_info['default']['init_commands']);
 
-    $this->settings['databases']['default'] = (object) array(
+    $this->settings['databases']['default'] = (object) [
       'value' => $connection_info,
       'required' => TRUE,
-    );
+    ];
     parent::setUp();
   }
 
@@ -40,13 +40,13 @@ protected function setUpSettings() {
     // All database settings should be pre-configured, except password.
     $values = $this->parameters['forms']['install_settings_form'];
     $driver = $values['driver'];
-    $edit = array();
+    $edit = [];
     if (isset($values[$driver]['password']) && $values[$driver]['password'] !== '') {
-      $edit = $this->translatePostValues(array(
-        $driver => array(
+      $edit = $this->translatePostValues([
+        $driver => [
           'password' => $values[$driver]['password'],
-        ),
-      ));
+        ],
+      ]);
     }
     $this->drupalPostForm(NULL, $edit, $this->translations['Save and continue']);
   }
diff --git a/core/modules/system/src/Tests/Installer/InstallerExistingSettingsMismatchProfileTest.php b/core/modules/system/src/Tests/Installer/InstallerExistingSettingsMismatchProfileTest.php
index a179039d0f92b7629a0d0fab54064be08d5e86e7..0349fe515244e6bb0150c2d64b7f5be5563b3e7e 100644
--- a/core/modules/system/src/Tests/Installer/InstallerExistingSettingsMismatchProfileTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerExistingSettingsMismatchProfileTest.php
@@ -24,20 +24,20 @@ class InstallerExistingSettingsMismatchProfileTest extends InstallerTestBase {
   protected function setUp() {
     // Pre-configure hash salt.
     // Any string is valid, so simply use the class name of this test.
-    $this->settings['settings']['hash_salt'] = (object) array(
+    $this->settings['settings']['hash_salt'] = (object) [
       'value' => __CLASS__,
       'required' => TRUE,
-    );
+    ];
 
     // Pre-configure database credentials.
     $connection_info = Database::getConnectionInfo();
     unset($connection_info['default']['pdo']);
     unset($connection_info['default']['init_commands']);
 
-    $this->settings['databases']['default'] = (object) array(
+    $this->settings['databases']['default'] = (object) [
       'value' => $connection_info,
       'required' => TRUE,
-    );
+    ];
 
     // During interactive install we'll change this to a different profile and
     // this test will ensure that the new value is written to settings.php.
@@ -47,12 +47,12 @@ protected function setUp() {
     ];
 
     // Pre-configure config directories.
-    $this->settings['config_directories'] = array(
-      CONFIG_SYNC_DIRECTORY => (object) array(
+    $this->settings['config_directories'] = [
+      CONFIG_SYNC_DIRECTORY => (object) [
         'value' => DrupalKernel::findSitePath(Request::createFromGlobals()) . '/files/config_sync',
         'required' => TRUE,
-      ),
-    );
+      ],
+    ];
     mkdir($this->settings['config_directories'][CONFIG_SYNC_DIRECTORY]->value, 0777, TRUE);
 
     parent::setUp();
diff --git a/core/modules/system/src/Tests/Installer/InstallerExistingSettingsNoProfileTest.php b/core/modules/system/src/Tests/Installer/InstallerExistingSettingsNoProfileTest.php
index 95173085ff9ab191017950d3fee3272e5ed1172b..3405cb598ae4a7d289697d2c30cfc143dc54b0e8 100644
--- a/core/modules/system/src/Tests/Installer/InstallerExistingSettingsNoProfileTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerExistingSettingsNoProfileTest.php
@@ -23,28 +23,28 @@ class InstallerExistingSettingsNoProfileTest extends InstallerTestBase {
   protected function setUp() {
     // Pre-configure hash salt.
     // Any string is valid, so simply use the class name of this test.
-    $this->settings['settings']['hash_salt'] = (object) array(
+    $this->settings['settings']['hash_salt'] = (object) [
       'value' => __CLASS__,
       'required' => TRUE,
-    );
+    ];
 
     // Pre-configure database credentials.
     $connection_info = Database::getConnectionInfo();
     unset($connection_info['default']['pdo']);
     unset($connection_info['default']['init_commands']);
 
-    $this->settings['databases']['default'] = (object) array(
+    $this->settings['databases']['default'] = (object) [
       'value' => $connection_info,
       'required' => TRUE,
-    );
+    ];
 
     // Pre-configure config directories.
-    $this->settings['config_directories'] = array(
-      CONFIG_SYNC_DIRECTORY => (object) array(
+    $this->settings['config_directories'] = [
+      CONFIG_SYNC_DIRECTORY => (object) [
         'value' => DrupalKernel::findSitePath(Request::createFromGlobals()) . '/files/config_sync',
         'required' => TRUE,
-      ),
-    );
+      ],
+    ];
     mkdir($this->settings['config_directories'][CONFIG_SYNC_DIRECTORY]->value, 0777, TRUE);
 
     parent::setUp();
diff --git a/core/modules/system/src/Tests/Installer/InstallerExistingSettingsTest.php b/core/modules/system/src/Tests/Installer/InstallerExistingSettingsTest.php
index eaca8fa3a4d91d532eae27c8f9f5fd30c80c102c..4f09b6b7c01ce417c46b818110ceaf375d8218da 100644
--- a/core/modules/system/src/Tests/Installer/InstallerExistingSettingsTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerExistingSettingsTest.php
@@ -24,38 +24,38 @@ class InstallerExistingSettingsTest extends InstallerTestBase {
   protected function setUp() {
     // Pre-configure hash salt.
     // Any string is valid, so simply use the class name of this test.
-    $this->settings['settings']['hash_salt'] = (object) array(
+    $this->settings['settings']['hash_salt'] = (object) [
       'value' => __CLASS__,
       'required' => TRUE,
-    );
+    ];
 
     // During interactive install we'll change this to a different profile and
     // this test will ensure that the new value is written to settings.php.
-    $this->settings['settings']['install_profile'] = (object) array(
+    $this->settings['settings']['install_profile'] = (object) [
       'value' => 'minimal',
       'required' => TRUE,
-    );
+    ];
 
     // Pre-configure database credentials.
     $connection_info = Database::getConnectionInfo();
     unset($connection_info['default']['pdo']);
     unset($connection_info['default']['init_commands']);
 
-    $this->settings['databases']['default'] = (object) array(
+    $this->settings['databases']['default'] = (object) [
       'value' => $connection_info,
       'required' => TRUE,
-    );
+    ];
 
     // Use the kernel to find the site path because the site.path service should
     // not be available at this point in the install process.
     $site_path = DrupalKernel::findSitePath(Request::createFromGlobals());
     // Pre-configure config directories.
-    $this->settings['config_directories'] = array(
-      CONFIG_SYNC_DIRECTORY => (object) array(
+    $this->settings['config_directories'] = [
+      CONFIG_SYNC_DIRECTORY => (object) [
         'value' => $site_path . '/files/config_sync',
         'required' => TRUE,
-      ),
-    );
+      ],
+    ];
     mkdir($this->settings['config_directories'][CONFIG_SYNC_DIRECTORY]->value, 0777, TRUE);
 
     parent::setUp();
diff --git a/core/modules/system/src/Tests/Installer/InstallerTest.php b/core/modules/system/src/Tests/Installer/InstallerTest.php
index 7a145f86018494824d9c5923ee47953fcb269c5d..01422a5cbbc7a255f6943233d63711aeb7bf1ada 100644
--- a/core/modules/system/src/Tests/Installer/InstallerTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerTest.php
@@ -22,9 +22,9 @@ public function testInstaller() {
 
     // Verify that the confirmation message appears.
     require_once \Drupal::root() . '/core/includes/install.inc';
-    $this->assertRaw(t('Congratulations, you installed @drupal!', array(
+    $this->assertRaw(t('Congratulations, you installed @drupal!', [
       '@drupal' => drupal_install_profile_distribution_name(),
-    )));
+    ]));
   }
 
   /**
@@ -48,7 +48,7 @@ protected function setUpLanguage() {
   protected function setUpProfile() {
     // Assert that the expected title is present.
     $this->assertEqual('Select an installation profile', $this->cssSelect('main h2')[0]);
-    $result = $this->xpath('//span[contains(@class, :class) and contains(text(), :text)]', array(':class' => 'visually-hidden', ':text' => 'Select an installation profile'));
+    $result = $this->xpath('//span[contains(@class, :class) and contains(text(), :text)]', [':class' => 'visually-hidden', ':text' => 'Select an installation profile']);
     $this->assertEqual(count($result), 1, "Title/Label not displayed when '#title_display' => 'invisible' attribute is set");
 
     parent::setUpProfile();
diff --git a/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php b/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
index a89a3cb7a2b88baf5d2237a155c06683440e2e65..a608cada77f342b30a1096ef0b10d2a029395d90 100644
--- a/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerTranslationMultipleLanguageTest.php
@@ -116,10 +116,10 @@ public function testTranslationsLoaded() {
 
       // Activate a module, to make sure that config is not overridden by module
       // installation.
-      $edit = array(
+      $edit = [
         'modules[views][enable]' => TRUE,
         'modules[filter][enable]' => TRUE,
-      );
+      ];
       $this->drupalPostForm('admin/modules', $edit, t('Install'));
 
       // Verify the strings from the translation are still as expected.
@@ -149,7 +149,7 @@ protected function verifyImportedStringsTranslated() {
 
     foreach ($test_samples as $sample) {
       foreach ($langcodes as $langcode) {
-        $edit = array();
+        $edit = [];
         $edit['langcode'] = $langcode;
         $edit['translation'] = 'translated';
         $edit['string'] = $sample;
diff --git a/core/modules/system/src/Tests/Installer/InstallerTranslationTest.php b/core/modules/system/src/Tests/Installer/InstallerTranslationTest.php
index ade71834b5a4a62915abe454f8fdd19d89b435bd..7a803e700b5a0c6e0c987dd28486875ff34ce8ae 100644
--- a/core/modules/system/src/Tests/Installer/InstallerTranslationTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerTranslationTest.php
@@ -84,11 +84,11 @@ public function testInstaller() {
     $this->assertEqual($account->language()->getId(), 'de', 'New user is German.');
 
     // Ensure that we can enable basic_auth on a non-english site.
-    $this->drupalPostForm('admin/modules', array('modules[basic_auth][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[basic_auth][enable]' => TRUE], t('Install'));
     $this->assertResponse(200);
 
     // Assert that the theme CSS was added to the page.
-    $edit = array('preprocess_css' => FALSE);
+    $edit = ['preprocess_css' => FALSE];
     $this->drupalPostForm('admin/config/development/performance', $edit, t('Save configuration'));
     $this->drupalGet('<front>');
     $this->assertRaw('classy/css/components/action-links.css');
@@ -96,7 +96,7 @@ public function testInstaller() {
     // Verify the strings from the translation files were imported.
     $test_samples = ['Save and continue', 'Anonymous'];
     foreach ($test_samples as $sample) {
-      $edit = array();
+      $edit = [];
       $edit['langcode'] = 'de';
       $edit['translation'] = 'translated';
       $edit['string'] = $sample;
diff --git a/core/modules/system/src/Tests/Installer/SingleVisibleProfileTest.php b/core/modules/system/src/Tests/Installer/SingleVisibleProfileTest.php
index b54c4113ba99980ddb07e0c9e37467a5450d7b87..91af34a2d16ee6891e861e31bb945d66486ce7c8 100644
--- a/core/modules/system/src/Tests/Installer/SingleVisibleProfileTest.php
+++ b/core/modules/system/src/Tests/Installer/SingleVisibleProfileTest.php
@@ -29,12 +29,12 @@ class SingleVisibleProfileTest extends InstallerTestBase {
   protected $info;
 
   protected function setUp() {
-    $this->info = array(
+    $this->info = [
       'type' => 'profile',
       'core' => \Drupal::CORE_COMPATIBILITY,
       'name' => 'Override standard',
       'hidden' => TRUE,
-    );
+    ];
     // File API functions are not available yet.
     $path = $this->siteDirectory . '/profiles/standard';
     mkdir($path, 0777, TRUE);
diff --git a/core/modules/system/src/Tests/Installer/StandardInstallerTest.php b/core/modules/system/src/Tests/Installer/StandardInstallerTest.php
index 61e7c84db2011056035af9ec7a296c020358735b..b0ceef9427af41fafb9c75b4ea5954f186c0274d 100644
--- a/core/modules/system/src/Tests/Installer/StandardInstallerTest.php
+++ b/core/modules/system/src/Tests/Installer/StandardInstallerTest.php
@@ -20,9 +20,9 @@ class StandardInstallerTest extends ConfigAfterInstallerTestBase {
   public function testInstaller() {
     // Verify that the confirmation message appears.
     require_once \Drupal::root() . '/core/includes/install.inc';
-    $this->assertRaw(t('Congratulations, you installed @drupal!', array(
+    $this->assertRaw(t('Congratulations, you installed @drupal!', [
       '@drupal' => drupal_install_profile_distribution_name(),
-    )));
+    ]));
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Menu/AssertBreadcrumbTrait.php b/core/modules/system/src/Tests/Menu/AssertBreadcrumbTrait.php
index f9c35eec3a8a370bc07e48e0b0ee786e8d96704b..a18f45cd3f4bb3f4a123a26210ad044a5e90343d 100644
--- a/core/modules/system/src/Tests/Menu/AssertBreadcrumbTrait.php
+++ b/core/modules/system/src/Tests/Menu/AssertBreadcrumbTrait.php
@@ -32,7 +32,7 @@ trait AssertBreadcrumbTrait {
    *   (optional) Whether the last link in $tree is expected to be active (TRUE)
    *   or just to be in the active trail (FALSE).
    */
-  protected function assertBreadcrumb($goto, array $trail, $page_title = NULL, array $tree = array(), $last_active = TRUE) {
+  protected function assertBreadcrumb($goto, array $trail, $page_title = NULL, array $tree = [], $last_active = TRUE) {
     if (isset($goto)) {
       $this->drupalGet($goto);
     }
@@ -40,7 +40,7 @@ protected function assertBreadcrumb($goto, array $trail, $page_title = NULL, arr
 
     // Additionally assert page title, if given.
     if (isset($page_title)) {
-      $this->assertTitle(strtr('@title | Drupal', array('@title' => $page_title)));
+      $this->assertTitle(strtr('@title | Drupal', ['@title' => $page_title]));
     }
 
     // Additionally assert active trail in a menu tree output, if given.
@@ -84,25 +84,25 @@ protected function assertBreadcrumbParts($trail) {
     // No parts must be left, or an expected "Home" will always pass.
     $pass = ($pass && empty($parts));
 
-    $this->assertTrue($pass, format_string('Breadcrumb %parts found on @path.', array(
+    $this->assertTrue($pass, format_string('Breadcrumb %parts found on @path.', [
       '%parts' => implode(' » ', $trail),
       '@path' => $this->getUrl(),
-    )));
+    ]));
   }
 
   /**
    * Returns the breadcrumb contents of the current page in the internal browser.
    */
   protected function getBreadcrumbParts() {
-    $parts = array();
+    $parts = [];
     $elements = $this->xpath('//nav[@class="breadcrumb"]/ol/li/a');
     if (!empty($elements)) {
       foreach ($elements as $element) {
-        $parts[] = array(
+        $parts[] = [
           'text' => (string) $element,
           'href' => (string) $element['href'],
           'title' => (string) $element['title'],
-        );
+        ];
       }
     }
     return $parts;
diff --git a/core/modules/system/src/Tests/Menu/AssertMenuActiveTrailTrait.php b/core/modules/system/src/Tests/Menu/AssertMenuActiveTrailTrait.php
index 4313b4cf292de7635cc9494114b145a1ed6d03db..05e0268c20e90673953323f2b041f7595ac7cb5e 100644
--- a/core/modules/system/src/Tests/Menu/AssertMenuActiveTrailTrait.php
+++ b/core/modules/system/src/Tests/Menu/AssertMenuActiveTrailTrait.php
@@ -30,11 +30,11 @@ protected function assertMenuActiveTrail($tree, $last_active) {
       foreach ($tree as $link_path => $link_title) {
         $part_xpath = (!$i ? '//' : '/following-sibling::ul/descendant::');
         $part_xpath .= 'li[contains(@class, :class)]/a[contains(@href, :href) and contains(text(), :title)]';
-        $part_args = array(
+        $part_args = [
           ':class' => 'menu-item--active-trail',
           ':href' => Url::fromUri('base:' . $link_path)->toString(),
           ':title' => $link_title,
-        );
+        ];
         $xpath .= $this->buildXPathQuery($part_xpath, $part_args);
         $i++;
       }
@@ -49,17 +49,17 @@ protected function assertMenuActiveTrail($tree, $last_active) {
     }
     $xpath_last_active = ($last_active ? 'and contains(@class, :class-active)' : '');
     $xpath .= 'li[contains(@class, :class-trail)]/a[contains(@href, :href) ' . $xpath_last_active . 'and contains(text(), :title)]';
-    $args = array(
+    $args = [
       ':class-trail' => 'menu-item--active-trail',
       ':class-active' => 'is-active',
       ':href' => Url::fromUri('base:' . $active_link_path)->toString(),
       ':title' => $active_link_title,
-    );
+    ];
     $elements = $this->xpath($xpath, $args);
-    $this->assertTrue(!empty($elements), format_string('Active link %title was found in menu tree, including active trail links %tree.', array(
+    $this->assertTrue(!empty($elements), format_string('Active link %title was found in menu tree, including active trail links %tree.', [
       '%title' => $active_link_title,
       '%tree' => implode(' » ', $tree),
-    )));
+    ]));
   }
 
 }
diff --git a/core/modules/system/src/Tests/Menu/BreadcrumbTest.php b/core/modules/system/src/Tests/Menu/BreadcrumbTest.php
index f756300e3554103b2265d32a12236c7fc06b28d2..f158f272bf4d52b7f1c35cd72b409760c0bfc113 100644
--- a/core/modules/system/src/Tests/Menu/BreadcrumbTest.php
+++ b/core/modules/system/src/Tests/Menu/BreadcrumbTest.php
@@ -18,7 +18,7 @@ class BreadcrumbTest extends MenuTestBase {
    *
    * @var array
    */
-  public static $modules = array('menu_test', 'block');
+  public static $modules = ['menu_test', 'block'];
 
   /**
    * An administrative user.
@@ -49,10 +49,10 @@ protected function setUp() {
     // This test puts menu links in the Tools menu and then tests for their
     // presence on the page, so we need to ensure that the Tools block will be
     // displayed in the admin theme.
-    $this->drupalPlaceBlock('system_menu_block:tools', array(
+    $this->drupalPlaceBlock('system_menu_block:tools', [
       'region' => 'content',
       'theme' => $this->config('system.theme')->get('admin'),
-    ));
+    ]);
   }
 
   /**
@@ -60,85 +60,85 @@ protected function setUp() {
    */
   function testBreadCrumbs() {
     // Prepare common base breadcrumb elements.
-    $home = array('' => 'Home');
-    $admin = $home + array('admin' => t('Administration'));
-    $config = $admin + array('admin/config' => t('Configuration'));
+    $home = ['' => 'Home'];
+    $admin = $home + ['admin' => t('Administration')];
+    $config = $admin + ['admin/config' => t('Configuration')];
     $type = 'article';
 
     // Verify Taxonomy administration breadcrumbs.
-    $trail = $admin + array(
+    $trail = $admin + [
       'admin/structure' => t('Structure'),
-    );
+    ];
     $this->assertBreadcrumb('admin/structure/taxonomy', $trail);
 
-    $trail += array(
+    $trail += [
       'admin/structure/taxonomy' => t('Taxonomy'),
-    );
+    ];
     $this->assertBreadcrumb('admin/structure/taxonomy/manage/tags', $trail);
-    $trail += array(
+    $trail += [
       'admin/structure/taxonomy/manage/tags' => t('Tags'),
-    );
+    ];
     $this->assertBreadcrumb('admin/structure/taxonomy/manage/tags/overview', $trail);
     $this->assertBreadcrumb('admin/structure/taxonomy/manage/tags/add', $trail);
 
     // Verify Menu administration breadcrumbs.
-    $trail = $admin + array(
+    $trail = $admin + [
       'admin/structure' => t('Structure'),
-    );
+    ];
     $this->assertBreadcrumb('admin/structure/menu', $trail);
 
-    $trail += array(
+    $trail += [
       'admin/structure/menu' => t('Menus'),
-    );
+    ];
     $this->assertBreadcrumb('admin/structure/menu/manage/tools', $trail);
 
-    $trail += array(
+    $trail += [
       'admin/structure/menu/manage/tools' => t('Tools'),
-    );
+    ];
     $this->assertBreadcrumb("admin/structure/menu/link/node.add_page/edit", $trail);
     $this->assertBreadcrumb('admin/structure/menu/manage/tools/add', $trail);
 
     // Verify Node administration breadcrumbs.
-    $trail = $admin + array(
+    $trail = $admin + [
       'admin/structure' => t('Structure'),
       'admin/structure/types' => t('Content types'),
-    );
+    ];
     $this->assertBreadcrumb('admin/structure/types/add', $trail);
     $this->assertBreadcrumb("admin/structure/types/manage/$type", $trail);
-    $trail += array(
+    $trail += [
       "admin/structure/types/manage/$type" => t('Article'),
-    );
+    ];
     $this->assertBreadcrumb("admin/structure/types/manage/$type/fields", $trail);
     $this->assertBreadcrumb("admin/structure/types/manage/$type/display", $trail);
-    $trail_teaser = $trail + array(
+    $trail_teaser = $trail + [
       "admin/structure/types/manage/$type/display" => t('Manage display'),
-    );
+    ];
     $this->assertBreadcrumb("admin/structure/types/manage/$type/display/teaser", $trail_teaser);
     $this->assertBreadcrumb("admin/structure/types/manage/$type/delete", $trail);
-    $trail += array(
+    $trail += [
       "admin/structure/types/manage/$type/fields" => t('Manage fields'),
-    );
+    ];
     $this->assertBreadcrumb("admin/structure/types/manage/$type/fields/node.$type.body", $trail);
 
     // Verify Filter text format administration breadcrumbs.
     $filter_formats = filter_formats();
     $format = reset($filter_formats);
     $format_id = $format->id();
-    $trail = $config + array(
+    $trail = $config + [
       'admin/config/content' => t('Content authoring'),
-    );
+    ];
     $this->assertBreadcrumb('admin/config/content/formats', $trail);
 
-    $trail += array(
+    $trail += [
       'admin/config/content/formats' => t('Text formats and editors'),
-    );
+    ];
     $this->assertBreadcrumb('admin/config/content/formats/add', $trail);
     $this->assertBreadcrumb("admin/config/content/formats/manage/$format_id", $trail);
     // @todo Remove this part once we have a _title_callback, see
     //   https://www.drupal.org/node/2076085.
-    $trail += array(
+    $trail += [
       "admin/config/content/formats/manage/$format_id" => $format->label(),
-    );
+    ];
     $this->assertBreadcrumb("admin/config/content/formats/manage/$format_id/disable", $trail);
 
     // Verify node breadcrumbs (without menu link).
@@ -151,13 +151,13 @@ function testBreadCrumbs() {
     // Also verify that the node does not appear elsewhere (e.g., menu trees).
     $this->assertNoLink($node1->getTitle());
 
-    $trail += array(
+    $trail += [
       "node/$nid1" => $node1->getTitle(),
-    );
+    ];
     $this->assertBreadcrumb("node/$nid1/edit", $trail);
 
     // Verify that breadcrumb on node listing page contains "Home" only.
-    $trail = array();
+    $trail = [];
     $this->assertBreadcrumb('node', $trail);
 
     // Verify node breadcrumbs (in menu).
@@ -165,7 +165,7 @@ function testBreadCrumbs() {
     // latter is a preferred menu by default.
     // @todo Also test all themes? Manually testing led to the suspicion that
     //   breadcrumbs may differ, possibly due to theme overrides.
-    $menus = array('main', 'tools');
+    $menus = ['main', 'tools'];
     // Alter node type menu settings.
     $node_type = NodeType::load($type);
     $node_type->setThirdPartySetting('menu_ui', 'available_menus', $menus);
@@ -175,17 +175,17 @@ function testBreadCrumbs() {
     foreach ($menus as $menu) {
       // Create a parent node in the current menu.
       $title = $this->randomMachineName();
-      $node2 = $this->drupalCreateNode(array(
+      $node2 = $this->drupalCreateNode([
         'type' => $type,
         'title' => $title,
-        'menu' => array(
+        'menu' => [
           'enabled' => 1,
           'title' => 'Parent ' . $title,
           'description' => '',
           'menu_name' => $menu,
           'parent' => '',
-        ),
-      ));
+        ],
+      ]);
 
       if ($menu == 'tools') {
         $parent = $node2;
@@ -195,38 +195,38 @@ function testBreadCrumbs() {
     // Create a Tools menu link for 'node', move the last parent node menu
     // link below it, and verify a full breadcrumb for the last child node.
     $menu = 'tools';
-    $edit = array(
+    $edit = [
       'title[0][value]' => 'Root',
       'link[0][uri]' => '/node',
-    );
+    ];
     $this->drupalPostForm("admin/structure/menu/manage/$menu/add", $edit, t('Save'));
-    $menu_links = entity_load_multiple_by_properties('menu_link_content', array('title' => 'Root'));
+    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => 'Root']);
     $link = reset($menu_links);
 
-    $edit = array(
+    $edit = [
       'menu[menu_parent]' => $link->getMenuName() . ':' . $link->getPluginId(),
-    );
+    ];
     $this->drupalPostForm('node/' . $parent->id() . '/edit', $edit, t('Save and keep published'));
-    $expected = array(
+    $expected = [
       "node" => $link->getTitle(),
-    );
+    ];
     $trail = $home + $expected;
-    $tree = $expected + array(
+    $tree = $expected + [
       'node/' . $parent->id() => $parent->menu['title'],
-    );
-    $trail += array(
+    ];
+    $trail += [
       'node/' . $parent->id() => $parent->menu['title'],
-    );
+    ];
 
     // Add a taxonomy term/tag to last node, and add a link for that term to the
     // Tools menu.
-    $tags = array(
-      'Drupal' => array(),
-      'Breadcrumbs' => array(),
-    );
-    $edit = array(
+    $tags = [
+      'Drupal' => [],
+      'Breadcrumbs' => [],
+    ];
+    $edit = [
       'field_tags[target_id]' => implode(',', array_keys($tags)),
-    );
+    ];
     $this->drupalPostForm('node/' . $parent->id() . '/edit', $edit, t('Save and keep published'));
 
     // Put both terms into a hierarchy Drupal » Breadcrumbs. Required for both
@@ -234,13 +234,13 @@ function testBreadCrumbs() {
     // the breadcrumb based on taxonomy term hierarchy.
     $parent_tid = 0;
     foreach ($tags as $name => $null) {
-      $terms = entity_load_multiple_by_properties('taxonomy_term', array('name' => $name));
+      $terms = entity_load_multiple_by_properties('taxonomy_term', ['name' => $name]);
       $term = reset($terms);
       $tags[$name]['term'] = $term;
       if ($parent_tid) {
-        $edit = array(
-          'parent[]' => array($parent_tid),
-        );
+        $edit = [
+          'parent[]' => [$parent_tid],
+        ];
         $this->drupalPostForm("taxonomy/term/{$term->id()}/edit", $edit, t('Save'));
       }
       $parent_tid = $term->id();
@@ -248,24 +248,24 @@ function testBreadCrumbs() {
     $parent_mlid = '';
     foreach ($tags as $name => $data) {
       $term = $data['term'];
-      $edit = array(
+      $edit = [
         'title[0][value]' => "$name link",
         'link[0][uri]' => "/taxonomy/term/{$term->id()}",
         'menu_parent' => "$menu:{$parent_mlid}",
         'enabled[value]' => 1,
-      );
+      ];
       $this->drupalPostForm("admin/structure/menu/manage/$menu/add", $edit, t('Save'));
-      $menu_links = entity_load_multiple_by_properties('menu_link_content', array(
+      $menu_links = entity_load_multiple_by_properties('menu_link_content', [
         'title' => $edit['title[0][value]'],
         'link.uri' => 'internal:/taxonomy/term/' . $term->id(),
-      ));
+      ]);
       $tags[$name]['link'] = reset($menu_links);
       $parent_mlid = $tags[$name]['link']->getPluginId();
     }
 
     // Verify expected breadcrumbs for menu links.
     $trail = $home;
-    $tree = array();
+    $tree = [];
     // Logout the user because we want to check the active class as well, which
     // is just rendered as anonymous user.
     $this->drupalLogout();
@@ -275,9 +275,9 @@ function testBreadCrumbs() {
       $link = $data['link'];
 
       $link_path = $link->getUrlObject()->getInternalPath();
-      $tree += array(
+      $tree += [
         $link_path => $link->getTitle(),
-      );
+      ];
       $this->assertBreadcrumb($link_path, $trail, $term->getName(), $tree);
       $this->assertEscaped($parent->getTitle(), 'Tagged node found.');
 
@@ -285,28 +285,28 @@ function testBreadCrumbs() {
       // untranslated menu links automatically generated from menu router items
       // ('taxonomy/term/%') should never be translated and appear in any menu
       // other than the breadcrumb trail.
-      $elements = $this->xpath('//nav[@id=:menu]/descendant::a[@href=:href]', array(
+      $elements = $this->xpath('//nav[@id=:menu]/descendant::a[@href=:href]', [
         ':menu' => 'block-bartik-tools',
         ':href' => Url::fromUri('base:' . $link_path)->toString(),
-      ));
+      ]);
       $this->assertTrue(count($elements) == 1, "Link to {$link_path} appears only once.");
 
       // Next iteration should expect this tag as parent link.
       // Note: Term name, not link name, due to taxonomy_term_page().
-      $trail += array(
+      $trail += [
         $link_path => $term->getName(),
-      );
+      ];
     }
 
     // Verify breadcrumbs on user and user/%.
     // We need to log back in and out below, and cannot simply grant the
     // 'administer users' permission, since user_page() makes your head explode.
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array(
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, [
       'access user profiles',
-    ));
+    ]);
 
     // Verify breadcrumb on front page.
-    $this->assertBreadcrumb('<front>', array());
+    $this->assertBreadcrumb('<front>', []);
 
     // Verify breadcrumb on user pages (without menu link) for anonymous user.
     $trail = $home;
@@ -318,39 +318,39 @@ function testBreadCrumbs() {
     $trail = $home;
     $this->assertBreadcrumb('user', $trail, $this->adminUser->getUsername());
     $this->assertBreadcrumb('user/' . $this->adminUser->id(), $trail, $this->adminUser->getUsername());
-    $trail += array(
+    $trail += [
       'user/' . $this->adminUser->id() => $this->adminUser->getUsername(),
-    );
+    ];
     $this->assertBreadcrumb('user/' . $this->adminUser->id() . '/edit', $trail, $this->adminUser->getUsername());
 
     // Create a second user to verify breadcrumb on user pages again.
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'administer users',
       'access user profiles',
-    ));
+    ]);
     $this->drupalLogin($this->webUser);
 
     // Verify correct breadcrumb and page title on another user's account pages.
     $trail = $home;
     $this->assertBreadcrumb('user/' . $this->adminUser->id(), $trail, $this->adminUser->getUsername());
-    $trail += array(
+    $trail += [
       'user/' . $this->adminUser->id() => $this->adminUser->getUsername(),
-    );
+    ];
     $this->assertBreadcrumb('user/' . $this->adminUser->id() . '/edit', $trail, $this->adminUser->getUsername());
 
     // Verify correct breadcrumb and page title when viewing own user account.
     $trail = $home;
     $this->assertBreadcrumb('user/' . $this->webUser->id(), $trail, $this->webUser->getUsername());
-    $trail += array(
+    $trail += [
       'user/' . $this->webUser->id() => $this->webUser->getUsername(),
-    );
+    ];
     $this->assertBreadcrumb('user/' . $this->webUser->id() . '/edit', $trail, $this->webUser->getUsername());
 
     // Create an only slightly privileged user being able to access site reports
     // but not administration pages.
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'access site reports',
-    ));
+    ]);
     $this->drupalLogin($this->webUser);
 
     // Verify that we can access recent log entries, there is a corresponding
@@ -366,7 +366,7 @@ function testBreadCrumbs() {
     $this->assertNoResponse(403);
 
     // Since the Reports page is accessible, that will show.
-    $trail += array('admin/reports' => t('Reports'));
+    $trail += ['admin/reports' => t('Reports')];
     $this->assertBreadcrumb('admin/reports/dblog', $trail, t('Recent log messages'));
     $this->assertNoResponse(403);
 
diff --git a/core/modules/system/src/Tests/Menu/LocalActionTest.php b/core/modules/system/src/Tests/Menu/LocalActionTest.php
index 40dc744fb3c0f7fb249b239e3c765169bd4b1efd..3886cb80956811219f64f3707ae29ac0f102ee68 100644
--- a/core/modules/system/src/Tests/Menu/LocalActionTest.php
+++ b/core/modules/system/src/Tests/Menu/LocalActionTest.php
@@ -68,9 +68,9 @@ public function testLocalAction() {
    *   A list of expected action link titles, keyed by the hrefs.
    */
   protected function assertLocalAction(array $actions) {
-    $elements = $this->xpath('//a[contains(@class, :class)]', array(
+    $elements = $this->xpath('//a[contains(@class, :class)]', [
       ':class' => 'button-action',
-    ));
+    ]);
     $index = 0;
     foreach ($actions as $action) {
       /** @var \Drupal\Core\Url $url */
diff --git a/core/modules/system/src/Tests/Menu/LocalTasksTest.php b/core/modules/system/src/Tests/Menu/LocalTasksTest.php
index 522e12b286b48dfc74b76260649251c6f5e8bee8..7171d3e541c1165d655326b228271f0dbec0075d 100644
--- a/core/modules/system/src/Tests/Menu/LocalTasksTest.php
+++ b/core/modules/system/src/Tests/Menu/LocalTasksTest.php
@@ -48,19 +48,19 @@ protected function setUp() {
    *   secondary. Defaults to 0.
    */
   protected function assertLocalTasks(array $routes, $level = 0) {
-    $elements = $this->xpath('//*[contains(@class, :class)]//a', array(
+    $elements = $this->xpath('//*[contains(@class, :class)]//a', [
       ':class' => $level == 0 ? 'tabs primary' : 'tabs secondary',
-    ));
+    ]);
     $this->assertTrue(count($elements), 'Local tasks found.');
     foreach ($routes as $index => $route_info) {
       list($route_name, $route_parameters) = $route_info;
       $expected = Url::fromRoute($route_name, $route_parameters)->toString();
       $method = ($elements[$index]['href'] == $expected ? 'pass' : 'fail');
-      $this->{$method}(format_string('Task @number href @value equals @expected.', array(
+      $this->{$method}(format_string('Task @number href @value equals @expected.', [
         '@number' => $index + 1,
         '@value' => (string) $elements[$index]['href'],
         '@expected' => $expected,
-      )));
+      ]));
     }
   }
 
@@ -89,9 +89,9 @@ protected function assertLocalTaskAppers($title) {
    *   secondary. Defaults to 0.
    */
   protected function assertNoLocalTasks($level = 0) {
-    $elements = $this->xpath('//*[contains(@class, :class)]//a', array(
+    $elements = $this->xpath('//*[contains(@class, :class)]//a', [
       ':class' => $level == 0 ? 'tabs primary' : 'tabs secondary',
-    ));
+    ]);
     $this->assertFalse(count($elements), 'Local tasks not found.');
   }
 
@@ -176,7 +176,7 @@ public function testPluginLocalTask() {
 
     // Test that we we correctly apply the active class to tabs where one of the
     // request attributes is upcast to an entity object.
-    $entity = \Drupal::entityManager()->getStorage('entity_test')->create(array('bundle' => 'test'));
+    $entity = \Drupal::entityManager()->getStorage('entity_test')->create(['bundle' => 'test']);
     $entity->save();
 
     $this->drupalGet(Url::fromRoute('menu_test.local_task_test_upcasting_sub1', ['entity_test' => '1']));
diff --git a/core/modules/system/src/Tests/Menu/MenuRouterTest.php b/core/modules/system/src/Tests/Menu/MenuRouterTest.php
index e7328d927b3b1f044100eabe937d4836e6555ce3..521a691537d328c8ec89654d23b7190526cc90c8 100644
--- a/core/modules/system/src/Tests/Menu/MenuRouterTest.php
+++ b/core/modules/system/src/Tests/Menu/MenuRouterTest.php
@@ -82,7 +82,7 @@ protected function doTestHookMenuIntegration() {
   protected function doTestTitleCallbackFalse() {
     $this->drupalGet('test-page');
     $this->assertText('A title with @placeholder', 'Raw text found on the page');
-    $this->assertNoText(t('A title with @placeholder', array('@placeholder' => 'some other text')), 'Text with placeholder substitutions not found.');
+    $this->assertNoText(t('A title with @placeholder', ['@placeholder' => 'some other text']), 'Text with placeholder substitutions not found.');
   }
 
   /**
@@ -110,7 +110,7 @@ protected function doTestDescriptionMenuItems() {
    * Tests for menu_name parameter for default menu links.
    */
   protected function doTestMenuName() {
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
     /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
     $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
@@ -179,7 +179,7 @@ protected function doTestMenuOptionalPlaceholders() {
    * Tests a menu on a router page.
    */
   protected function doTestMenuOnRoute() {
-    \Drupal::service('module_installer')->install(array('router_test'));
+    \Drupal::service('module_installer')->install(['router_test']);
     \Drupal::service('router.builder')->rebuild();
     $this->resetAll();
 
@@ -210,7 +210,7 @@ protected function doTestExoticPath() {
   public function testMaintenanceModeLoginPaths() {
     $this->container->get('state')->set('system.maintenance_mode', TRUE);
 
-    $offline_message = t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => $this->config('system.site')->get('name')));
+    $offline_message = t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', ['@site' => $this->config('system.site')->get('name')]);
     $this->drupalGet('test-page');
     $this->assertText($offline_message);
     $this->drupalGet('menu_login_callback');
@@ -224,7 +224,7 @@ public function testMaintenanceModeLoginPaths() {
    * 'user' and 'user/register' gets redirected to the user edit page.
    */
   public function testAuthUserUserLogin() {
-    $web_user = $this->drupalCreateUser(array());
+    $web_user = $this->drupalCreateUser([]);
     $this->drupalLogin($web_user);
 
     $this->drupalGet('user/login');
@@ -282,7 +282,7 @@ protected function doTestThemeCallbackMaintenanceMode() {
     $this->assertRaw('bartik/css/base/elements.css', "The maintenance theme's CSS appears on the page.");
 
     // An administrator, however, should continue to see the requested theme.
-    $admin_user = $this->drupalCreateUser(array('access site in maintenance mode'));
+    $admin_user = $this->drupalCreateUser(['access site in maintenance mode']);
     $this->drupalLogin($admin_user);
     $this->drupalGet('menu-test/theme-callback/use-admin-theme');
     $this->assertText('Active theme: seven. Actual theme: seven.', 'The theme negotiation system is correctly triggered for an administrator when the site is in maintenance mode.');
@@ -302,13 +302,13 @@ protected function doTestThemeCallbackOptionalTheme() {
 
     // Now install the theme and request it again.
     $theme_handler = $this->container->get('theme_handler');
-    $theme_handler->install(array('test_theme'));
+    $theme_handler->install(['test_theme']);
 
     $this->drupalGet('menu-test/theme-callback/use-test-theme');
     $this->assertText('Active theme: test_theme. Actual theme: test_theme.', 'The theme negotiation system uses an optional theme once it has been installed.');
     $this->assertRaw('test_theme/kitten.css', "The optional theme's CSS appears on the page.");
 
-    $theme_handler->uninstall(array('test_theme'));
+    $theme_handler->uninstall(['test_theme']);
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Module/DependencyTest.php b/core/modules/system/src/Tests/Module/DependencyTest.php
index 6160ef464899b1fa98426590fef681fd41985002..1e297de0aac32cad5928ce97ae81be984862cd9d 100644
--- a/core/modules/system/src/Tests/Module/DependencyTest.php
+++ b/core/modules/system/src/Tests/Module/DependencyTest.php
@@ -13,16 +13,16 @@ class DependencyTest extends ModuleTestBase {
    * Checks functionality of project namespaces for dependencies.
    */
   function testProjectNamespaceForDependencies() {
-    $edit = array(
+    $edit = [
       'modules[filter][enable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
     // Enable module with project namespace to ensure nothing breaks.
-    $edit = array(
+    $edit = [
       'modules[system_project_namespace_test][enable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
-    $this->assertModules(array('system_project_namespace_test'), TRUE);
+    $this->assertModules(['system_project_namespace_test'], TRUE);
   }
 
   /**
@@ -30,19 +30,19 @@ function testProjectNamespaceForDependencies() {
    */
   function testEnableWithoutDependency() {
     // Attempt to enable Content Translation without Language enabled.
-    $edit = array();
+    $edit = [];
     $edit['modules[content_translation][enable]'] = 'content_translation';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
     $this->assertText(t('Some required modules must be enabled'), 'Dependency required.');
 
-    $this->assertModules(array('content_translation', 'language'), FALSE);
+    $this->assertModules(['content_translation', 'language'], FALSE);
 
     // Assert that the language tables weren't enabled.
     $this->assertTableCount('language', FALSE);
 
     $this->drupalPostForm(NULL, NULL, t('Continue'));
     $this->assertText(t('2 modules have been enabled: Content Translation, Language.'), 'Modules status has been updated.');
-    $this->assertModules(array('content_translation', 'language'), TRUE);
+    $this->assertModules(['content_translation', 'language'], TRUE);
 
     // Assert that the language YAML files were created.
     $storage = $this->container->get('config.storage');
@@ -56,7 +56,7 @@ function testMissingModules() {
     // Test that the system_dependencies_test module is marked
     // as missing a dependency.
     $this->drupalGet('admin/modules');
-    $this->assertRaw(t('@module (<span class="admin-missing">missing</span>)', array('@module' => Unicode::ucfirst('_missing_dependency'))), 'A module with missing dependencies is marked as such.');
+    $this->assertRaw(t('@module (<span class="admin-missing">missing</span>)', ['@module' => Unicode::ucfirst('_missing_dependency')]), 'A module with missing dependencies is marked as such.');
     $checkbox = $this->xpath('//input[@type="checkbox" and @disabled="disabled" and @name="modules[system_dependencies_test][enable]"]');
     $this->assert(count($checkbox) == 1, 'Checkbox for the module is disabled.');
   }
@@ -68,10 +68,10 @@ function testIncompatibleModuleVersionDependency() {
     // Test that the system_incompatible_module_version_dependencies_test is
     // marked as having an incompatible dependency.
     $this->drupalGet('admin/modules');
-    $this->assertRaw(t('@module (<span class="admin-missing">incompatible with</span> version @version)', array(
+    $this->assertRaw(t('@module (<span class="admin-missing">incompatible with</span> version @version)', [
       '@module' => 'System incompatible module version test (>2.0)',
       '@version' => '1.0',
-    )), 'A module that depends on an incompatible version of a module is marked as such.');
+    ]), 'A module that depends on an incompatible version of a module is marked as such.');
     $checkbox = $this->xpath('//input[@type="checkbox" and @disabled="disabled" and @name="modules[system_incompatible_module_version_dependencies_test][enable]"]');
     $this->assert(count($checkbox) == 1, 'Checkbox for the module is disabled.');
   }
@@ -83,9 +83,9 @@ function testIncompatibleCoreVersionDependency() {
     // Test that the system_incompatible_core_version_dependencies_test is
     // marked as having an incompatible dependency.
     $this->drupalGet('admin/modules');
-    $this->assertRaw(t('@module (<span class="admin-missing">incompatible with</span> this version of Drupal core)', array(
+    $this->assertRaw(t('@module (<span class="admin-missing">incompatible with</span> this version of Drupal core)', [
       '@module' => 'System incompatible core version test',
-    )), 'A module that depends on a module with an incompatible core version is marked as such.');
+    ]), 'A module that depends on a module with an incompatible core version is marked as such.');
     $checkbox = $this->xpath('//input[@type="checkbox" and @disabled="disabled" and @name="modules[system_incompatible_core_version_dependencies_test][enable]"]');
     $this->assert(count($checkbox) == 1, 'Checkbox for the module is disabled.');
   }
@@ -94,25 +94,25 @@ function testIncompatibleCoreVersionDependency() {
    * Tests enabling a module that depends on a module which fails hook_requirements().
    */
   function testEnableRequirementsFailureDependency() {
-    \Drupal::service('module_installer')->install(array('comment'));
+    \Drupal::service('module_installer')->install(['comment']);
 
-    $this->assertModules(array('requirements1_test'), FALSE);
-    $this->assertModules(array('requirements2_test'), FALSE);
+    $this->assertModules(['requirements1_test'], FALSE);
+    $this->assertModules(['requirements2_test'], FALSE);
 
     // Attempt to install both modules at the same time.
-    $edit = array();
+    $edit = [];
     $edit['modules[requirements1_test][enable]'] = 'requirements1_test';
     $edit['modules[requirements2_test][enable]'] = 'requirements2_test';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
 
     // Makes sure the modules were NOT installed.
     $this->assertText(t('Requirements 1 Test failed requirements'), 'Modules status has been updated.');
-    $this->assertModules(array('requirements1_test'), FALSE);
-    $this->assertModules(array('requirements2_test'), FALSE);
+    $this->assertModules(['requirements1_test'], FALSE);
+    $this->assertModules(['requirements2_test'], FALSE);
 
     // Makes sure that already enabled modules the failing modules depend on
     // were not disabled.
-    $this->assertModules(array('comment'), TRUE);
+    $this->assertModules(['comment'], TRUE);
   }
 
   /**
@@ -121,21 +121,21 @@ function testEnableRequirementsFailureDependency() {
    * Dependencies should be enabled before their dependents.
    */
   function testModuleEnableOrder() {
-    \Drupal::service('module_installer')->install(array('module_test'), FALSE);
+    \Drupal::service('module_installer')->install(['module_test'], FALSE);
     $this->resetAll();
-    $this->assertModules(array('module_test'), TRUE);
+    $this->assertModules(['module_test'], TRUE);
     \Drupal::state()->set('module_test.dependency', 'dependency');
     // module_test creates a dependency chain:
     // - color depends on config
     // - config depends on help
-    $expected_order = array('help', 'config', 'color');
+    $expected_order = ['help', 'config', 'color'];
 
     // Enable the modules through the UI, verifying that the dependency chain
     // is correct.
-    $edit = array();
+    $edit = [];
     $edit['modules[color][enable]'] = 'color';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
-    $this->assertModules(array('color'), FALSE);
+    $this->assertModules(['color'], FALSE);
     // Note that dependencies are sorted alphabetically in the confirmation
     // message.
     $this->assertText(t('You must enable the Configuration Manager, Help modules to install Color.'));
@@ -143,10 +143,10 @@ function testModuleEnableOrder() {
     $edit['modules[config][enable]'] = 'config';
     $edit['modules[help][enable]'] = 'help';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
-    $this->assertModules(array('color', 'config', 'help'), TRUE);
+    $this->assertModules(['color', 'config', 'help'], TRUE);
 
     // Check the actual order which is saved by module_test_modules_enabled().
-    $module_order = \Drupal::state()->get('module_test.install_order') ?: array();
+    $module_order = \Drupal::state()->get('module_test.install_order') ?: [];
     $this->assertIdentical($module_order, $expected_order);
   }
 
@@ -155,10 +155,10 @@ function testModuleEnableOrder() {
    */
   function testUninstallDependents() {
     // Enable the forum module.
-    $edit = array('modules[forum][enable]' => 'forum');
+    $edit = ['modules[forum][enable]' => 'forum'];
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
-    $this->drupalPostForm(NULL, array(), t('Continue'));
-    $this->assertModules(array('forum'), TRUE);
+    $this->drupalPostForm(NULL, [], t('Continue'));
+    $this->assertModules(['forum'], TRUE);
 
     // Check that the comment module cannot be uninstalled.
     $this->drupalGet('admin/modules/uninstall');
@@ -176,13 +176,13 @@ function testUninstallDependents() {
     }
     // Uninstall the forum module, and check that taxonomy now can also be
     // uninstalled.
-    $edit = array('uninstall[forum]' => 'forum');
+    $edit = ['uninstall[forum]' => 'forum'];
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
     $this->drupalPostForm(NULL, NULL, t('Uninstall'));
     $this->assertText(t('The selected modules have been uninstalled.'), 'Modules status has been updated.');
 
     // Uninstall comment module.
-    $edit = array('uninstall[comment]' => 'comment');
+    $edit = ['uninstall[comment]' => 'comment'];
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
     $this->drupalPostForm(NULL, NULL, t('Uninstall'));
     $this->assertText(t('The selected modules have been uninstalled.'), 'Modules status has been updated.');
diff --git a/core/modules/system/src/Tests/Module/HookRequirementsTest.php b/core/modules/system/src/Tests/Module/HookRequirementsTest.php
index 2f4fccad82c0fcc3478dedb8493153ee55649b3b..75813c6118fa912bf7950541b57e5cb1c65f26e2 100644
--- a/core/modules/system/src/Tests/Module/HookRequirementsTest.php
+++ b/core/modules/system/src/Tests/Module/HookRequirementsTest.php
@@ -12,16 +12,16 @@ class HookRequirementsTest extends ModuleTestBase {
    * Assert that a module cannot be installed if it fails hook_requirements().
    */
   function testHookRequirementsFailure() {
-    $this->assertModules(array('requirements1_test'), FALSE);
+    $this->assertModules(['requirements1_test'], FALSE);
 
     // Attempt to install the requirements1_test module.
-    $edit = array();
+    $edit = [];
     $edit['modules[requirements1_test][enable]'] = 'requirements1_test';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
 
     // Makes sure the module was NOT installed.
     $this->assertText(t('Requirements 1 Test failed requirements'), 'Modules status has been updated.');
-    $this->assertModules(array('requirements1_test'), FALSE);
+    $this->assertModules(['requirements1_test'], FALSE);
   }
 
 }
diff --git a/core/modules/system/src/Tests/Module/InstallUninstallTest.php b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
index 3882013ab6a35727ad040cd94d928a44bdad827a..f4db81e18e02246d53bf50dd05ec2d415a79b9d7 100644
--- a/core/modules/system/src/Tests/Module/InstallUninstallTest.php
+++ b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
@@ -15,7 +15,7 @@ class InstallUninstallTest extends ModuleTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('system_test', 'dblog', 'taxonomy', 'update_test_postupdate');
+  public static $modules = ['system_test', 'dblog', 'taxonomy', 'update_test_postupdate'];
 
   /**
    * Tests that a fixed set of modules can be installed and uninstalled.
@@ -27,9 +27,9 @@ public function testInstallUninstall() {
 
     // Install and uninstall module_test to ensure hook_preinstall_module and
     // hook_preuninstall_module are fired as expected.
-    $this->container->get('module_installer')->install(array('module_test'));
+    $this->container->get('module_installer')->install(['module_test']);
     $this->assertEqual($this->container->get('state')->get('system_test_preinstall_module'), 'module_test');
-    $this->container->get('module_installer')->uninstall(array('module_test'));
+    $this->container->get('module_installer')->uninstall(['module_test']);
     $this->assertEqual($this->container->get('state')->get('system_test_preuninstall_module'), 'module_test');
     $this->resetAll();
 
@@ -58,7 +58,7 @@ public function testInstallUninstall() {
     // Install the Help module, and verify it installed successfully.
     unset($all_modules['help']);
     $this->assertModuleNotInstalled('help');
-    $edit = array();
+    $edit = [];
     $edit["modules[help][enable]"] = TRUE;
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
     $this->assertText('has been enabled', 'Modules status has been updated.');
@@ -76,7 +76,7 @@ public function testInstallUninstall() {
       $was_installed_list = \Drupal::moduleHandler()->getModuleList();
 
       // Start a list of modules that we expect to be installed this time.
-      $modules_to_install = array($name);
+      $modules_to_install = [$name];
       foreach (array_keys($module->requires) as $dependency) {
         if (isset($all_modules[$dependency])) {
           $modules_to_install[] = $dependency;
@@ -90,7 +90,7 @@ public function testInstallUninstall() {
       }
 
       // Install the module.
-      $edit = array();
+      $edit = [];
       $package = $module->info['package'];
       $edit['modules[' . $name . '][enable]'] = TRUE;
       $this->drupalPostForm('admin/modules', $edit, t('Install'));
@@ -104,7 +104,7 @@ public function testInstallUninstall() {
           // indicating they need to be enabled.
           $this->assertText('You must enable');
         }
-        $this->drupalPostForm(NULL, array(), t('Continue'));
+        $this->drupalPostForm(NULL, [], t('Continue'));
       }
       // Handle the case where modules were installed along with this one and
       // where we therefore hit a confirmation screen.
@@ -113,26 +113,26 @@ public function testInstallUninstall() {
         // about enabling dependencies appears.
         $this->assertText('Some required modules must be enabled');
         $this->assertText('You must enable');
-        $this->drupalPostForm(NULL, array(), t('Continue'));
+        $this->drupalPostForm(NULL, [], t('Continue'));
       }
 
       // List the module display names to check the confirmation message.
-      $module_names = array();
+      $module_names = [];
       foreach ($modules_to_install as $module_to_install) {
         $module_names[] = $all_modules[$module_to_install]->info['name'];
       }
-      $expected_text = \Drupal::translation()->formatPlural(count($module_names), 'Module @name has been enabled.', '@count modules have been enabled: @names.', array(
+      $expected_text = \Drupal::translation()->formatPlural(count($module_names), 'Module @name has been enabled.', '@count modules have been enabled: @names.', [
         '@name' => $module_names[0],
         '@names' => implode(', ', $module_names),
-      ));
+      ]);
       $this->assertText($expected_text, 'Modules status has been updated.');
 
       // Check that hook_modules_installed() was invoked with the expected list
       // of modules, that each module's database tables now exist, and that
       // appropriate messages appear in the logs.
       foreach ($modules_to_install as $module_to_install) {
-        $this->assertText(t('hook_modules_installed fired for @module', array('@module' => $module_to_install)));
-        $this->assertLogMessage('system', "%module module installed.", array('%module' => $module_to_install), RfcLogLevel::INFO);
+        $this->assertText(t('hook_modules_installed fired for @module', ['@module' => $module_to_install]));
+        $this->assertLogMessage('system', "%module module installed.", ['%module' => $module_to_install], RfcLogLevel::INFO);
         $this->assertInstallModuleUpdates($module_to_install);
         $this->assertModuleSuccessfullyInstalled($module_to_install);
       }
@@ -163,7 +163,7 @@ public function testInstallUninstall() {
             // This one is eligible for being uninstalled.
             $package = $all_modules[$to_uninstall]->info['package'];
             $this->assertSuccessfulUninstall($to_uninstall, $package);
-            $added_modules = array_diff($added_modules, array($to_uninstall));
+            $added_modules = array_diff($added_modules, [$to_uninstall]);
           }
         }
 
@@ -187,7 +187,7 @@ public function testInstallUninstall() {
     //   uninstalled.
     // - That enabling more than one module at the same time does not lead to
     //   any errors.
-    $edit = array();
+    $edit = [];
     $experimental = FALSE;
     foreach ($all_modules as $name => $module) {
       $edit['modules[' . $name . '][enable]'] = TRUE;
@@ -201,12 +201,12 @@ public function testInstallUninstall() {
     // If there are experimental modules, click the confirm form.
     if ($experimental) {
       $this->assertText('Are you sure you wish to enable experimental modules?');
-      $this->drupalPostForm(NULL, array(), t('Continue'));
+      $this->drupalPostForm(NULL, [], t('Continue'));
     }
     // The string tested here is translatable but we are only using a part of it
     // so using a translated string is wrong. Doing so would create a new string
     // to translate.
-    $this->assertText(new FormattableMarkup('@count modules have been enabled: ', array('@count' => count($all_modules))), 'Modules status has been updated.');
+    $this->assertText(new FormattableMarkup('@count modules have been enabled: ', ['@count' => count($all_modules)]), 'Modules status has been updated.');
   }
 
   /**
@@ -216,7 +216,7 @@ public function testInstallUninstall() {
    *   Name of the module to check.
    */
   protected function assertModuleNotInstalled($name) {
-    $this->assertModules(array($name), FALSE);
+    $this->assertModules([$name], FALSE);
     $this->assertModuleTablesDoNotExist($name);
   }
 
@@ -227,7 +227,7 @@ protected function assertModuleNotInstalled($name) {
    *   Name of the module to check.
    */
   protected function assertModuleSuccessfullyInstalled($name) {
-    $this->assertModules(array($name), TRUE);
+    $this->assertModules([$name], TRUE);
     $this->assertModuleTablesExist($name);
     $this->assertModuleConfig($name);
   }
@@ -242,19 +242,19 @@ protected function assertModuleSuccessfullyInstalled($name) {
    *   to 'Core'.
    */
   protected function assertSuccessfulUninstall($module, $package = 'Core') {
-    $edit = array();
+    $edit = [];
     $edit['uninstall[' . $module . ']'] = TRUE;
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
     $this->drupalPostForm(NULL, NULL, t('Uninstall'));
     $this->assertText(t('The selected modules have been uninstalled.'), 'Modules status has been updated.');
-    $this->assertModules(array($module), FALSE);
+    $this->assertModules([$module], FALSE);
 
     // Check that the appropriate hook was fired and the appropriate log
     // message appears. (But don't check for the log message if the dblog
     // module was just uninstalled, since the {watchdog} table won't be there
     // anymore.)
-    $this->assertText(t('hook_modules_uninstalled fired for @module', array('@module' => $module)));
-    $this->assertLogMessage('system', "%module module uninstalled.", array('%module' => $module), RfcLogLevel::INFO);
+    $this->assertText(t('hook_modules_uninstalled fired for @module', ['@module' => $module]));
+    $this->assertLogMessage('system', "%module module uninstalled.", ['%module' => $module], RfcLogLevel::INFO);
 
     // Check that the module's database tables no longer exist.
     $this->assertModuleTablesDoNotExist($module);
diff --git a/core/modules/system/src/Tests/Module/ModuleTestBase.php b/core/modules/system/src/Tests/Module/ModuleTestBase.php
index ccf8cd56dcc85c0cf10527022afcda957be95e55..8d669caa7d2dfaa01c1a115199e4134e26e144c8 100644
--- a/core/modules/system/src/Tests/Module/ModuleTestBase.php
+++ b/core/modules/system/src/Tests/Module/ModuleTestBase.php
@@ -21,14 +21,14 @@ abstract class ModuleTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('system_test');
+  public static $modules = ['system_test'];
 
   protected $adminUser;
 
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'administer modules'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer modules']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -45,9 +45,9 @@ function assertTableCount($base_table, $count = TRUE) {
     $tables = db_find_tables(Database::getConnection()->prefixTables('{' . $base_table . '}') . '%');
 
     if ($count) {
-      return $this->assertTrue($tables, format_string('Tables matching "@base_table" found.', array('@base_table' => $base_table)));
+      return $this->assertTrue($tables, format_string('Tables matching "@base_table" found.', ['@base_table' => $base_table]));
     }
-    return $this->assertFalse($tables, format_string('Tables matching "@base_table" not found.', array('@base_table' => $base_table)));
+    return $this->assertFalse($tables, format_string('Tables matching "@base_table" not found.', ['@base_table' => $base_table]));
   }
 
   /**
@@ -64,7 +64,7 @@ function assertModuleTablesExist($module) {
         $tables_exist = FALSE;
       }
     }
-    return $this->assertTrue($tables_exist, format_string('All database tables defined by the @module module exist.', array('@module' => $module)));
+    return $this->assertTrue($tables_exist, format_string('All database tables defined by the @module module exist.', ['@module' => $module]));
   }
 
   /**
@@ -81,7 +81,7 @@ function assertModuleTablesDoNotExist($module) {
         $tables_exist = TRUE;
       }
     }
-    return $this->assertFalse($tables_exist, format_string('None of the database tables defined by the @module module exist.', array('@module' => $module)));
+    return $this->assertFalse($tables_exist, format_string('None of the database tables defined by the @module module exist.', ['@module' => $module]));
   }
 
   /**
@@ -123,7 +123,7 @@ function assertModuleConfig($module) {
     }
     // Verify that all configuration has been installed (which means that $names
     // is empty).
-    return $this->assertFalse($names, format_string('All default configuration of @module module found.', array('@module' => $module)));
+    return $this->assertFalse($names, format_string('All default configuration of @module module found.', ['@module' => $module]));
   }
 
   /**
@@ -137,7 +137,7 @@ function assertModuleConfig($module) {
    */
   function assertNoModuleConfig($module) {
     $names = \Drupal::configFactory()->listAll($module . '.');
-    return $this->assertFalse($names, format_string('No configuration found for @module module.', array('@module' => $module)));
+    return $this->assertFalse($names, format_string('No configuration found for @module module.', ['@module' => $module]));
   }
 
   /**
@@ -157,7 +157,7 @@ function assertModules(array $modules, $enabled) {
       else {
         $message = 'Module "@module" is not enabled.';
       }
-      $this->assertEqual($this->container->get('module_handler')->moduleExists($module), $enabled, format_string($message, array('@module' => $module)));
+      $this->assertEqual($this->container->get('module_handler')->moduleExists($module), $enabled, format_string($message, ['@module' => $module]));
     }
   }
 
@@ -181,7 +181,7 @@ function assertModules(array $modules, $enabled) {
    * @param $link
    *   A link to associate with the message.
    */
-  function assertLogMessage($type, $message, $variables = array(), $severity = RfcLogLevel::NOTICE, $link = '') {
+  function assertLogMessage($type, $message, $variables = [], $severity = RfcLogLevel::NOTICE, $link = '') {
     $count = db_select('watchdog', 'w')
       ->condition('type', $type)
       ->condition('message', $message)
@@ -191,7 +191,7 @@ function assertLogMessage($type, $message, $variables = array(), $severity = Rfc
       ->countQuery()
       ->execute()
       ->fetchField();
-    $this->assertTrue($count > 0, format_string('watchdog table contains @count rows for @message', array('@count' => $count, '@message' => format_string($message, $variables))));
+    $this->assertTrue($count > 0, format_string('watchdog table contains @count rows for @message', ['@count' => $count, '@message' => format_string($message, $variables)]));
   }
 
 }
diff --git a/core/modules/system/src/Tests/Module/RequiredTest.php b/core/modules/system/src/Tests/Module/RequiredTest.php
index a1e648b4a2572605de8a3bd97795052a05ca36b9..b5f17305e5f2da03cd7422edff8a2b7712dc5a75 100644
--- a/core/modules/system/src/Tests/Module/RequiredTest.php
+++ b/core/modules/system/src/Tests/Module/RequiredTest.php
@@ -20,7 +20,7 @@ function testDisableRequired() {
       if (!empty($info['required'])) {
         $field_name = 'modules[' . $module . '][enable]';
         if (empty($info['hidden'])) {
-          $this->assertFieldByXPath("//input[@name='$field_name' and @disabled='disabled' and @checked='checked']", '', format_string('Field @name was disabled and checked.', array('@name' => $field_name)));
+          $this->assertFieldByXPath("//input[@name='$field_name' and @disabled='disabled' and @checked='checked']", '', format_string('Field @name was disabled and checked.', ['@name' => $field_name]));
         }
         else {
           $this->assertNoFieldByName($field_name);
diff --git a/core/modules/system/src/Tests/Module/VersionTest.php b/core/modules/system/src/Tests/Module/VersionTest.php
index fee684cc62e6b652cae2c580109a754afe302a6a..1e33f11d43e633e3b7118ab00a2ad7931e5cea9b 100644
--- a/core/modules/system/src/Tests/Module/VersionTest.php
+++ b/core/modules/system/src/Tests/Module/VersionTest.php
@@ -13,7 +13,7 @@ class VersionTest extends ModuleTestBase {
    * Test version dependencies.
    */
   function testModuleVersions() {
-    $dependencies = array(
+    $dependencies = [
       // Alternating between being compatible and incompatible with 8.x-2.4-beta3.
       // The first is always a compatible.
       'common_test',
@@ -43,7 +43,7 @@ function testModuleVersions() {
       'common_test (>2.4-beta2)',
       // Testing extra version. Incompatible.
       'common_test (>2.4-rc0)',
-    );
+    ];
     \Drupal::state()->set('system_test.dependencies', $dependencies);
     $n = count($dependencies);
     for ($i = 0; $i < $n; $i++) {
diff --git a/core/modules/system/src/Tests/Pager/PagerTest.php b/core/modules/system/src/Tests/Pager/PagerTest.php
index 4c13c0fa1caa1a18b2c4772e94c96814190915bc..9aae6dec11d980d72da869ff9cad9a9c8975d958 100644
--- a/core/modules/system/src/Tests/Pager/PagerTest.php
+++ b/core/modules/system/src/Tests/Pager/PagerTest.php
@@ -16,7 +16,7 @@ class PagerTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('dblog', 'pager_test');
+  public static $modules = ['dblog', 'pager_test'];
 
   /**
    * A user with permission to access site reports.
@@ -36,9 +36,9 @@ protected function setUp() {
       $logger->debug($this->randomString());
     }
 
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'access site reports',
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -53,14 +53,14 @@ function testActiveClass() {
 
     // Verify any page but first/last.
     $current_page++;
-    $this->drupalGet('admin/reports/dblog', array('query' => array('page' => $current_page)));
+    $this->drupalGet('admin/reports/dblog', ['query' => ['page' => $current_page]]);
     $this->assertPagerItems($current_page);
 
     // Verify last page.
-    $elements = $this->xpath('//li[contains(@class, :class)]/a', array(':class' => 'pager__item--last'));
+    $elements = $this->xpath('//li[contains(@class, :class)]/a', [':class' => 'pager__item--last']);
     preg_match('@page=(\d+)@', $elements[0]['href'], $matches);
     $current_page = (int) $matches[1];
-    $this->drupalGet($GLOBALS['base_root'] . parse_url($this->getUrl())['path'] . $elements[0]['href'], array('external' => TRUE));
+    $this->drupalGet($GLOBALS['base_root'] . parse_url($this->getUrl())['path'] . $elements[0]['href'], ['external' => TRUE]);
     $this->assertPagerItems($current_page);
   }
 
@@ -75,16 +75,16 @@ protected function testPagerQueryParametersAndCacheContext() {
     $this->assertCacheContext('url.query_args');
 
     // Go to last page, the count of pager calls need to go to 1.
-    $elements = $this->xpath('//li[contains(@class, :class)]/a', array(':class' => 'pager__item--last'));
+    $elements = $this->xpath('//li[contains(@class, :class)]/a', [':class' => 'pager__item--last']);
     $this->drupalGet($this->getAbsoluteUrl($elements[0]['href']));
     $this->assertText(t('Pager calls: 1'), 'First link call to pager shows 1 calls.');
     $this->assertText('[url.query_args.pagers:0]=0.60');
     $this->assertCacheContext('url.query_args');
 
     // Go back to first page, the count of pager calls need to go to 2.
-    $elements = $this->xpath('//li[contains(@class, :class)]/a', array(':class' => 'pager__item--first'));
+    $elements = $this->xpath('//li[contains(@class, :class)]/a', [':class' => 'pager__item--first']);
     $this->drupalGet($this->getAbsoluteUrl($elements[0]['href']));
-    $this->drupalGet($GLOBALS['base_root'] . parse_url($this->getUrl())['path'] . $elements[0]['href'], array('external' => TRUE));
+    $this->drupalGet($GLOBALS['base_root'] . parse_url($this->getUrl())['path'] . $elements[0]['href'], ['external' => TRUE]);
     $this->assertText(t('Pager calls: 2'), 'Second link call to pager shows 2 calls.');
     $this->assertText('[url.query_args.pagers:0]=0.0');
     $this->assertCacheContext('url.query_args');
@@ -203,7 +203,7 @@ public function testPagerEllipsis() {
    *   The current pager page the internal browser is on.
    */
   protected function assertPagerItems($current_page) {
-    $elements = $this->xpath('//ul[contains(@class, :class)]/li', array(':class' => 'pager__items'));
+    $elements = $this->xpath('//ul[contains(@class, :class)]/li', [':class' => 'pager__items']);
     $this->assertTrue(!empty($elements), 'Pager found.');
 
     // Make current page 1-based.
diff --git a/core/modules/system/src/Tests/Path/UrlAliasFixtures.php b/core/modules/system/src/Tests/Path/UrlAliasFixtures.php
index a527fc5fc56478c1be22e78e2ef2c87670ec2eb2..71cd736380e0efeaf4acdbea1f29767dffb90163 100644
--- a/core/modules/system/src/Tests/Path/UrlAliasFixtures.php
+++ b/core/modules/system/src/Tests/Path/UrlAliasFixtures.php
@@ -47,28 +47,28 @@ public function dropTables(Connection $connection) {
    * @return array of URL alias definitions.
    */
   public function sampleUrlAliases() {
-    return array(
-      array(
+    return [
+      [
         'source' => '/node/1',
         'alias' => '/alias_for_node_1_en',
         'langcode' => 'en'
-      ),
-      array(
+      ],
+      [
         'source' => '/node/2',
         'alias' => '/alias_for_node_2_en',
         'langcode' => 'en'
-      ),
-      array(
+      ],
+      [
         'source' => '/node/1',
         'alias' => '/alias_for_node_1_fr',
         'langcode' => 'fr'
-      ),
-      array(
+      ],
+      [
         'source' => '/node/1',
         'alias' => '/alias_for_node_1_und',
         'langcode' => 'und'
-      )
-    );
+      ]
+    ];
   }
 
 
@@ -79,7 +79,7 @@ public function sampleUrlAliases() {
    *   Table definitions.
    */
   public function tableDefinition() {
-    $tables = array();
+    $tables = [];
 
     // Prime the drupal_get_filename() cache with the location of the system
     // module as its location is known and shouldn't change.
diff --git a/core/modules/system/src/Tests/Routing/MockAliasManager.php b/core/modules/system/src/Tests/Routing/MockAliasManager.php
index 7c7920f4afdfbe6b7aa54aa21590dee4cbae5c52..09f36366fc6725e4c8fceaed05d9d8535efc1537 100644
--- a/core/modules/system/src/Tests/Routing/MockAliasManager.php
+++ b/core/modules/system/src/Tests/Routing/MockAliasManager.php
@@ -14,21 +14,21 @@ class MockAliasManager implements AliasManagerInterface {
    *
    * @var array
    */
-  protected $aliases = array();
+  protected $aliases = [];
 
   /**
    * Array of mocked aliases. Keys are aliases, followed by language.
    *
    * @var array
    */
-  protected $systemPaths = array();
+  protected $systemPaths = [];
 
   /**
    * An index of aliases that have been requested.
    *
    * @var array
    */
-  protected $lookedUp = array();
+  protected $lookedUp = [];
 
   /**
    * The language to assume a path alias is for if not specified.
diff --git a/core/modules/system/src/Tests/Routing/MockRouteProvider.php b/core/modules/system/src/Tests/Routing/MockRouteProvider.php
index 689fc06806f14416e7541a982d0b1e602ac9c5c2..37f8812225ae03738e49a640a8370d03ebe8960c 100644
--- a/core/modules/system/src/Tests/Routing/MockRouteProvider.php
+++ b/core/modules/system/src/Tests/Routing/MockRouteProvider.php
@@ -43,7 +43,7 @@ public function getRouteCollectionForRequest(Request $request) {
    * {@inheritdoc}
    */
   public function getRouteByName($name) {
-    $routes = $this->getRoutesByNames(array($name));
+    $routes = $this->getRoutesByNames([$name]);
     if (empty($routes)) {
       throw new RouteNotFoundException(sprintf('Route "%s" does not exist.', $name));
     }
@@ -62,7 +62,7 @@ public function preLoadRoutes($names) {
    * {@inheritdoc}
    */
   public function getRoutesByNames($names) {
-    $routes = array();
+    $routes = [];
     foreach ($names as $name) {
       $routes[] = $this->routes->get($name);
     }
@@ -88,7 +88,7 @@ public function getAllRoutes() {
    * {@inheritdoc}
    */
   public function reset() {
-    $this->routes = array();
+    $this->routes = [];
   }
 
 }
diff --git a/core/modules/system/src/Tests/Routing/RouterTest.php b/core/modules/system/src/Tests/Routing/RouterTest.php
index 8ff515436d984312d136fb6385059f52687767fe..38d7ecbe04c4d7da7438fecc6846ad1b8fc05ed5 100644
--- a/core/modules/system/src/Tests/Routing/RouterTest.php
+++ b/core/modules/system/src/Tests/Routing/RouterTest.php
@@ -21,7 +21,7 @@ class RouterTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('router_test');
+  public static $modules = ['router_test'];
 
   /**
    * Confirms that our FinishResponseSubscriber logic works properly.
@@ -133,7 +133,7 @@ public function testDuplicateRoutePaths() {
    */
   public function testControllerPlaceholders() {
     // Test with 0 and a random value.
-    $values = array("0", $this->randomMachineName());
+    $values = ["0", $this->randomMachineName()];
     foreach ($values as $value) {
       $this->drupalGet('router_test/test3/' . $value);
       $this->assertResponse(200);
@@ -289,7 +289,7 @@ public function testControllerResolutionAjax() {
    * Tests that routes no longer exist for a module that has been uninstalled.
    */
   public function testRouterUninstallInstall() {
-    \Drupal::service('module_installer')->uninstall(array('router_test'));
+    \Drupal::service('module_installer')->uninstall(['router_test']);
     \Drupal::service('router.builder')->rebuild();
     try {
       \Drupal::service('router.route_provider')->getRouteByName('router_test.1');
@@ -299,7 +299,7 @@ public function testRouterUninstallInstall() {
       $this->pass('Route was delete on uninstall.');
     }
     // Install the module again.
-    \Drupal::service('module_installer')->install(array('router_test'));
+    \Drupal::service('module_installer')->install(['router_test']);
     \Drupal::service('router.builder')->rebuild();
     $route = \Drupal::service('router.route_provider')->getRouteByName('router_test.1');
     $this->assertNotNull($route, 'Route exists after module installation');
diff --git a/core/modules/system/src/Tests/Session/SessionHttpsTest.php b/core/modules/system/src/Tests/Session/SessionHttpsTest.php
index 8e25fd263572cbbfff6798d839ffe58c00e41c9e..6ba70da52bb52a403502ce4d74e50987f2b2c88a 100644
--- a/core/modules/system/src/Tests/Session/SessionHttpsTest.php
+++ b/core/modules/system/src/Tests/Session/SessionHttpsTest.php
@@ -33,7 +33,7 @@ class SessionHttpsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('session_test');
+  public static $modules = ['session_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -50,7 +50,7 @@ protected function setUp() {
   }
 
   public function testHttpsSession() {
-    $user = $this->drupalCreateUser(array('access administration pages'));
+    $user = $this->drupalCreateUser(['access administration pages']);
 
     // Test HTTPS session handling by altering the form action to submit the
     // login form through https.php, which creates a mock HTTPS request.
@@ -58,7 +58,7 @@ public function testHttpsSession() {
 
     // Test a second concurrent session.
     $this->curlClose();
-    $this->curlCookies = array();
+    $this->curlCookies = [];
     $this->loginHttps($user);
 
     // Check secure cookie on secure page.
@@ -80,7 +80,7 @@ public function testHttpsSession() {
 
     // Verify that empty SID cannot be used on the non-secure site.
     $this->curlClose();
-    $this->curlCookies = array($this->insecureSessionName . '=');
+    $this->curlCookies = [$this->insecureSessionName . '='];
     $this->drupalGet($this->httpUrl('admin/config'));
     $this->assertResponse(403);
 
@@ -88,7 +88,7 @@ public function testHttpsSession() {
     // login form through http.php, which creates a mock HTTP request on HTTPS
     // test environments.
     $this->curlClose();
-    $this->curlCookies = array();
+    $this->curlCookies = [];
     $this->loginHttp($user);
     $this->drupalGet($this->httpUrl('admin/config'));
     $this->assertResponse(200);
@@ -97,12 +97,12 @@ public function testHttpsSession() {
 
     // Verify that empty secure SID cannot be used on the secure site.
     $this->curlClose();
-    $this->curlCookies = array($this->secureSessionName . '=');
+    $this->curlCookies = [$this->secureSessionName . '='];
     $this->drupalGet($this->httpsUrl('admin/config'));
     $this->assertResponse(403);
 
     // Clear browser cookie jar.
-    $this->cookies = array();
+    $this->cookies = [];
   }
 
   /**
@@ -117,7 +117,7 @@ protected function loginHttp(AccountInterface $account) {
     // creates a mock HTTP request on HTTPS test environments.
     $form = $this->xpath('//form[@id="user-login-form"]');
     $form[0]['action'] = $this->httpUrl('user/login');
-    $edit = array('name' => $account->getUsername(), 'pass' => $account->pass_raw);
+    $edit = ['name' => $account->getUsername(), 'pass' => $account->pass_raw];
 
     // When posting directly to the HTTP or HTTPS mock front controller, the
     // location header on the returned response is an absolute URL. That URL
@@ -148,7 +148,7 @@ protected function loginHttps(AccountInterface $account) {
     // creates a mock HTTPS request on HTTP test environments.
     $form = $this->xpath('//form[@id="user-login-form"]');
     $form[0]['action'] = $this->httpsUrl('user/login');
-    $edit = array('name' => $account->getUsername(), 'pass' => $account->pass_raw);
+    $edit = ['name' => $account->getUsername(), 'pass' => $account->pass_raw];
 
     // When posting directly to the HTTP or HTTPS mock front controller, the
     // location header on the returned response is an absolute URL. That URL
@@ -168,7 +168,7 @@ protected function loginHttps(AccountInterface $account) {
     // necessary to manually collect the session cookie and add it to the
     // curlCookies property such that it will be used on subsequent requests via
     // the HTTPS mock.
-    $this->curlCookies = array($this->secureSessionName . '=' . $this->cookies[$this->secureSessionName]['value']);
+    $this->curlCookies = [$this->secureSessionName . '=' . $this->cookies[$this->secureSessionName]['value']];
 
     // Follow the location header.
     $path = $this->getPathFromLocationHeader(TRUE);
@@ -215,9 +215,9 @@ protected function getPathFromLocationHeader($https = FALSE, $response_code = 30
    *   has the given insecure and secure session IDs.
    */
   protected function assertSessionIds($sid, $assertion_text) {
-    $args = array(
+    $args = [
       ':sid' => Crypt::hashBase64($sid),
-    );
+    ];
     return $this->assertTrue(db_query('SELECT timestamp FROM {sessions} WHERE sid = :sid', $args)->fetchField(), $assertion_text);
   }
 
diff --git a/core/modules/system/src/Tests/Session/SessionTest.php b/core/modules/system/src/Tests/Session/SessionTest.php
index 139fba517f42719dd7ffdb73fdb114057a39a94e..9b2dc88aa7d56430c177e0ed3021c4d95f85aac4 100644
--- a/core/modules/system/src/Tests/Session/SessionTest.php
+++ b/core/modules/system/src/Tests/Session/SessionTest.php
@@ -16,7 +16,7 @@ class SessionTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('session_test');
+  public static $modules = ['session_test'];
 
   protected $dumpHeaders = TRUE;
 
@@ -48,24 +48,24 @@ function testSessionSaveRegenerate() {
     $user->name = 'session_test_user';
     $user->save();
     $this->drupalGet('session-test/id');
-    $matches = array();
+    $matches = [];
     preg_match('/\s*session_id:(.*)\n/', $this->getRawContent(), $matches);
     $this->assertTrue(!empty($matches[1]), 'Found session ID before logging in.');
     $original_session = $matches[1];
 
     // We cannot use $this->drupalLogin($user); because we exit in
     // session_test_user_login() which breaks a normal assertion.
-    $edit = array(
+    $edit = [
       'name' => $user->getUsername(),
       'pass' => $user->pass_raw
-    );
+    ];
     $this->drupalPostForm('user/login', $edit, t('Log in'));
     $this->drupalGet('user');
-    $pass = $this->assertText($user->getUsername(), format_string('Found name: %name', array('%name' => $user->getUsername())), 'User login');
+    $pass = $this->assertText($user->getUsername(), format_string('Found name: %name', ['%name' => $user->getUsername()]), 'User login');
     $this->_logged_in = $pass;
 
     $this->drupalGet('session-test/id');
-    $matches = array();
+    $matches = [];
     preg_match('/\s*session_id:(.*)\n/', $this->getRawContent(), $matches);
     $this->assertTrue(!empty($matches[1]), 'Found session ID after logging in.');
     $this->assertTrue($matches[1] != $original_session, 'Session ID changed after login.');
@@ -75,7 +75,7 @@ function testSessionSaveRegenerate() {
    * Test data persistence via the session_test module callbacks.
    */
   function testDataPersistence() {
-    $user = $this->drupalCreateUser(array());
+    $user = $this->drupalCreateUser([]);
     // Enable sessions.
     $this->sessionReset($user->id());
 
@@ -127,7 +127,7 @@ function testDataPersistence() {
     $this->assertNoText($value_1, 'Session has persisted for an authenticated user after logging out and then back in.', 'Session');
 
     // Change session and create another user.
-    $user2 = $this->drupalCreateUser(array());
+    $user2 = $this->drupalCreateUser([]);
     $this->sessionReset($user2->id());
     $this->drupalLogin($user2);
   }
@@ -211,11 +211,11 @@ function testEmptyAnonymousSession() {
    * Test that sessions are only saved when necessary.
    */
   function testSessionWrite() {
-    $user = $this->drupalCreateUser(array());
+    $user = $this->drupalCreateUser([]);
     $this->drupalLogin($user);
 
     $sql = 'SELECT u.access, s.timestamp FROM {users_field_data} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE u.uid = :uid';
-    $times1 = db_query($sql, array(':uid' => $user->id()))->fetchObject();
+    $times1 = db_query($sql, [':uid' => $user->id()])->fetchObject();
 
     // Before every request we sleep one second to make sure that if the session
     // is saved, its timestamp will change.
@@ -223,34 +223,34 @@ function testSessionWrite() {
     // Modify the session.
     sleep(1);
     $this->drupalGet('session-test/set/foo');
-    $times2 = db_query($sql, array(':uid' => $user->id()))->fetchObject();
+    $times2 = db_query($sql, [':uid' => $user->id()])->fetchObject();
     $this->assertEqual($times2->access, $times1->access, 'Users table was not updated.');
     $this->assertNotEqual($times2->timestamp, $times1->timestamp, 'Sessions table was updated.');
 
     // Write the same value again, i.e. do not modify the session.
     sleep(1);
     $this->drupalGet('session-test/set/foo');
-    $times3 = db_query($sql, array(':uid' => $user->id()))->fetchObject();
+    $times3 = db_query($sql, [':uid' => $user->id()])->fetchObject();
     $this->assertEqual($times3->access, $times1->access, 'Users table was not updated.');
     $this->assertEqual($times3->timestamp, $times2->timestamp, 'Sessions table was not updated.');
 
     // Do not change the session.
     sleep(1);
     $this->drupalGet('');
-    $times4 = db_query($sql, array(':uid' => $user->id()))->fetchObject();
+    $times4 = db_query($sql, [':uid' => $user->id()])->fetchObject();
     $this->assertEqual($times4->access, $times3->access, 'Users table was not updated.');
     $this->assertEqual($times4->timestamp, $times3->timestamp, 'Sessions table was not updated.');
 
     // Force updating of users and sessions table once per second.
     $this->settingsSet('session_write_interval', 0);
     // Write that value also into the test settings.php file.
-    $settings['settings']['session_write_interval'] = (object) array(
+    $settings['settings']['session_write_interval'] = (object) [
       'value' => 0,
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
     $this->drupalGet('');
-    $times5 = db_query($sql, array(':uid' => $user->id()))->fetchObject();
+    $times5 = db_query($sql, [':uid' => $user->id()])->fetchObject();
     $this->assertNotEqual($times5->access, $times4->access, 'Users table was updated.');
     $this->assertNotEqual($times5->timestamp, $times4->timestamp, 'Sessions table was updated.');
   }
@@ -259,14 +259,14 @@ function testSessionWrite() {
    * Test that empty session IDs are not allowed.
    */
   function testEmptySessionID() {
-    $user = $this->drupalCreateUser(array());
+    $user = $this->drupalCreateUser([]);
     $this->drupalLogin($user);
     $this->drupalGet('session-test/is-logged-in');
     $this->assertResponse(200, 'User is logged in.');
 
     // Reset the sid in {sessions} to a blank string. This may exist in the
     // wild in some cases, although we normally prevent it from happening.
-    db_query("UPDATE {sessions} SET sid = '' WHERE uid = :uid", array(':uid' => $user->id()));
+    db_query("UPDATE {sessions} SET sid = '' WHERE uid = :uid", [':uid' => $user->id()]);
     // Send a blank sid in the session cookie, and the session should no longer
     // be valid. Closing the curl handler will stop the previous session ID
     // from persisting.
diff --git a/core/modules/system/src/Tests/Session/StackSessionHandlerIntegrationTest.php b/core/modules/system/src/Tests/Session/StackSessionHandlerIntegrationTest.php
index af962fa5cdadfd43ac4bd8e3e9952e8bada744ea..ac368685db070dc0faa554559e2c0b9674cd6ce2 100644
--- a/core/modules/system/src/Tests/Session/StackSessionHandlerIntegrationTest.php
+++ b/core/modules/system/src/Tests/Session/StackSessionHandlerIntegrationTest.php
@@ -16,7 +16,7 @@ class StackSessionHandlerIntegrationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('session_test');
+  public static $modules = ['session_test'];
 
   /**
    * Tests a request.
diff --git a/core/modules/system/src/Tests/System/AccessDeniedTest.php b/core/modules/system/src/Tests/System/AccessDeniedTest.php
index e7f17d78b360abef3b83a427037a74a30d14492d..f06cf1f0f8bb7cd1085bc2b454b5535e2414fa29 100644
--- a/core/modules/system/src/Tests/System/AccessDeniedTest.php
+++ b/core/modules/system/src/Tests/System/AccessDeniedTest.php
@@ -32,8 +32,8 @@ protected function setUp() {
     $this->adminUser->roles[] = 'administrator';
     $this->adminUser->save();
 
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access user profiles'));
-    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('access user profiles'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access user profiles']);
+    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, ['access user profiles']);
   }
 
   function testAccessDenied() {
@@ -65,7 +65,7 @@ function testAccessDenied() {
     $this->drupalPostForm('admin/config/system/site-information', $edit, t('Save configuration'));
 
     // Enable the user login block.
-    $block = $this->drupalPlaceBlock('user_login_block', array('id' => 'login'));
+    $block = $this->drupalPlaceBlock('user_login_block', ['id' => 'login']);
 
     // Log out and check that the user login block is shown on custom 403 pages.
     $this->drupalLogout();
@@ -94,10 +94,10 @@ function testAccessDenied() {
 
     // Check that we can log in from the 403 page.
     $this->drupalLogout();
-    $edit = array(
+    $edit = [
       'name' => $this->adminUser->getUsername(),
       'pass' => $this->adminUser->pass_raw,
-    );
+    ];
     $this->drupalPostForm('admin/config/system/site-information', $edit, t('Log in'));
 
     // Check that we're still on the same page.
diff --git a/core/modules/system/src/Tests/System/AdminTest.php b/core/modules/system/src/Tests/System/AdminTest.php
index 8921ad0a871afa72977da2e293fb02a0b602f934..222a4027797d4b874d0e58c2c420c4204fb9f2d8 100644
--- a/core/modules/system/src/Tests/System/AdminTest.php
+++ b/core/modules/system/src/Tests/System/AdminTest.php
@@ -31,7 +31,7 @@ class AdminTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('locale');
+  public static $modules = ['locale'];
 
   protected function setUp() {
     // testAdminPages() requires Locale module.
@@ -41,10 +41,10 @@ protected function setUp() {
     // who can only access administration pages and perform some Locale module
     // administrative tasks, but not all of them.
     $this->adminUser = $this->drupalCreateUser(array_keys(\Drupal::service('user.permissions')->getPermissions()));
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'access administration pages',
       'translate interface',
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -69,11 +69,11 @@ function testAdminPages() {
     // but no links to its individual sub-configuration pages. Also verify that
     // a user with access to only some Locale module administration pages only
     // sees links to the pages they have access to.
-    $admin_list_pages = array(
+    $admin_list_pages = [
       'admin/index',
       'admin/config',
       'admin/config/regional',
-    );
+    ];
 
     foreach ($admin_list_pages as $page) {
       // For the administrator, verify that there are links to Locale's primary
@@ -125,14 +125,14 @@ protected function getTopLevelMenuLinks() {
     $parameters = new MenuTreeParameters();
     $parameters->setRoot('system.admin')->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
     $tree = $menu_tree->load(NULL, $parameters);
-    $manipulators = array(
-      array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-      array('callable' => 'menu.default_tree_manipulators:flatten'),
-    );
+    $manipulators = [
+      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+      ['callable' => 'menu.default_tree_manipulators:flatten'],
+    ];
     $tree = $menu_tree->transform($tree, $manipulators);
 
     // Transform the tree to a list of menu links.
-    $menu_links = array();
+    $menu_links = [];
     foreach ($tree as $element) {
       $menu_links[] = $element->link;
     }
@@ -151,7 +151,7 @@ function testCompactMode() {
 
     $this->drupalGet('admin/compact/on');
     $this->assertResponse(200, 'A valid page is returned after turning on compact mode.');
-    $this->assertUrl($frontpage_url, array(), 'The user is redirected to the front page after turning on compact mode.');
+    $this->assertUrl($frontpage_url, [], 'The user is redirected to the front page after turning on compact mode.');
     $this->assertTrue($this->cookies['Drupal.visitor.admin_compact_mode']['value'], 'Compact mode turns on.');
     $this->drupalGet('admin/compact/on');
     $this->assertTrue($this->cookies['Drupal.visitor.admin_compact_mode']['value'], 'Compact mode remains on after a repeat call.');
@@ -160,7 +160,7 @@ function testCompactMode() {
 
     $this->drupalGet('admin/compact/off');
     $this->assertResponse(200, 'A valid page is returned after turning off compact mode.');
-    $this->assertUrl($frontpage_url, array(), 'The user is redirected to the front page after turning off compact mode.');
+    $this->assertUrl($frontpage_url, [], 'The user is redirected to the front page after turning off compact mode.');
     $this->assertEqual($this->cookies['Drupal.visitor.admin_compact_mode']['value'], 'deleted', 'Compact mode turns off.');
     $this->drupalGet('admin/compact/off');
     $this->assertEqual($this->cookies['Drupal.visitor.admin_compact_mode']['value'], 'deleted', 'Compact mode remains off after a repeat call.');
diff --git a/core/modules/system/src/Tests/System/CronRunTest.php b/core/modules/system/src/Tests/System/CronRunTest.php
index 26a56a32c118022407a76722509a82d4dd873137..d11a51616cf7224fd82ae862cf14c808bc533c2d 100644
--- a/core/modules/system/src/Tests/System/CronRunTest.php
+++ b/core/modules/system/src/Tests/System/CronRunTest.php
@@ -47,7 +47,7 @@ function testAutomatedCron() {
     // Test with a logged in user; anonymous users likely don't cause Drupal to
     // fully bootstrap, because of the internal page cache or an external
     // reverse proxy. Reuse this user for disabling cron later in the test.
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
 
     // Ensure cron does not run when a non-zero cron interval is specified and
@@ -97,7 +97,7 @@ function testCronExceptions() {
    * Make sure the cron UI reads from the state storage.
    */
   function testCronUI() {
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
     $this->drupalGet('admin/config/system/cron');
     // Don't use REQUEST to calculate the exact time, because that will
@@ -114,7 +114,7 @@ function testCronUI() {
    * Ensure that the manual cron run is working.
    */
   public function testManualCron() {
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
 
     $this->drupalGet('admin/reports/status/run-cron');
diff --git a/core/modules/system/src/Tests/System/DefaultMobileMetaTagsTest.php b/core/modules/system/src/Tests/System/DefaultMobileMetaTagsTest.php
index 98d82d36b9dc3f2080e796d8dbedec8b296a8712..3edfb7bb7691239b20028955cb5f7e40309ffcee 100644
--- a/core/modules/system/src/Tests/System/DefaultMobileMetaTagsTest.php
+++ b/core/modules/system/src/Tests/System/DefaultMobileMetaTagsTest.php
@@ -20,9 +20,9 @@ class DefaultMobileMetaTagsTest extends WebTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->defaultMetaTags = array(
+    $this->defaultMetaTags = [
       'viewport' => '<meta name="viewport" content="width=device-width, initial-scale=1.0" />',
-    );
+    ];
   }
 
   /**
@@ -31,7 +31,7 @@ protected function setUp() {
   public function testDefaultMetaTagsExist() {
     $this->drupalGet('');
     foreach ($this->defaultMetaTags as $name => $metatag) {
-      $this->assertRaw($metatag, SafeMarkup::format('Default Mobile meta tag "@name" displayed properly.', array('@name' => $name)), 'System');
+      $this->assertRaw($metatag, SafeMarkup::format('Default Mobile meta tag "@name" displayed properly.', ['@name' => $name]), 'System');
     }
   }
 
@@ -39,10 +39,10 @@ public function testDefaultMetaTagsExist() {
    * Verifies that the default mobile meta tags can be removed.
    */
   public function testRemovingDefaultMetaTags() {
-    \Drupal::service('module_installer')->install(array('system_module_test'));
+    \Drupal::service('module_installer')->install(['system_module_test']);
     $this->drupalGet('');
     foreach ($this->defaultMetaTags as $name => $metatag) {
-      $this->assertNoRaw($metatag, SafeMarkup::format('Default Mobile meta tag "@name" removed properly.', array('@name' => $name)), 'System');
+      $this->assertNoRaw($metatag, SafeMarkup::format('Default Mobile meta tag "@name" removed properly.', ['@name' => $name]), 'System');
     }
   }
 
diff --git a/core/modules/system/src/Tests/System/ErrorHandlerTest.php b/core/modules/system/src/Tests/System/ErrorHandlerTest.php
index 113d4955170b15fba0381a26cf458a7b138b61d7..e2a7eb5f99dad8b32417685af7e739e2e7e91ce2 100644
--- a/core/modules/system/src/Tests/System/ErrorHandlerTest.php
+++ b/core/modules/system/src/Tests/System/ErrorHandlerTest.php
@@ -17,36 +17,36 @@ class ErrorHandlerTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('error_test');
+  public static $modules = ['error_test'];
 
   /**
    * Test the error handler.
    */
   function testErrorHandler() {
     $config = $this->config('system.logging');
-    $error_notice = array(
+    $error_notice = [
       '%type' => 'Notice',
       '@message' => 'Undefined variable: bananas',
       '%function' => 'Drupal\error_test\Controller\ErrorTestController->generateWarnings()',
       '%file' => drupal_get_path('module', 'error_test') . '/error_test.module',
-    );
-    $error_warning = array(
+    ];
+    $error_warning = [
       '%type' => 'Warning',
       '@message' => 'Division by zero',
       '%function' => 'Drupal\error_test\Controller\ErrorTestController->generateWarnings()',
       '%file' => drupal_get_path('module', 'error_test') . '/error_test.module',
-    );
-    $error_user_notice = array(
+    ];
+    $error_user_notice = [
       '%type' => 'User warning',
       '@message' => 'Drupal & awesome',
       '%function' => 'Drupal\error_test\Controller\ErrorTestController->generateWarnings()',
       '%file' => drupal_get_path('module', 'error_test') . '/error_test.module',
-    );
-    $fatal_error = array(
+    ];
+    $fatal_error = [
       '%type' => 'Recoverable fatal error',
       '%function' => 'Drupal\error_test\Controller\ErrorTestController->Drupal\error_test\Controller\{closure}()',
       '@message' => 'Argument 1 passed to Drupal\error_test\Controller\ErrorTestController::Drupal\error_test\Controller\{closure}() must be of the type array, string given, called in ' . \Drupal::root() . '/core/modules/system/tests/modules/error_test/src/Controller/ErrorTestController.php on line 62 and defined',
-    );
+    ];
     if (version_compare(PHP_VERSION, '7.0.0-dev') >= 0) {
       // In PHP 7, instead of a recoverable fatal error we get a TypeError.
       $fatal_error['%type'] = 'TypeError';
@@ -125,27 +125,27 @@ function testExceptionHandler() {
     // Ensure the test error log is empty before these tests.
     $this->assertNoErrorsLogged();
 
-    $error_exception = array(
+    $error_exception = [
       '%type' => 'Exception',
       '@message' => 'Drupal & awesome',
       '%function' => 'Drupal\error_test\Controller\ErrorTestController->triggerException()',
       '%line' => 56,
       '%file' => drupal_get_path('module', 'error_test') . '/error_test.module',
-    );
-    $error_pdo_exception = array(
+    ];
+    $error_pdo_exception = [
       '%type' => 'DatabaseExceptionWrapper',
       '@message' => 'SELECT * FROM bananas_are_awesome',
       '%function' => 'Drupal\error_test\Controller\ErrorTestController->triggerPDOException()',
       '%line' => 64,
       '%file' => drupal_get_path('module', 'error_test') . '/error_test.module',
-    );
-    $error_renderer_exception = array(
+    ];
+    $error_renderer_exception = [
       '%type' => 'Exception',
       '@message' => 'This is an exception that occurs during rendering',
       '%function' => 'Drupal\error_test\Controller\ErrorTestController->Drupal\error_test\Controller\{closure}()',
       '%line' => 82,
       '%file' => drupal_get_path('module', 'error_test') . '/error_test.module',
-    );
+    ];
 
     $this->drupalGet('error-test/trigger-exception');
     $this->assertTrue(strpos($this->drupalGetHeader(':status'), '500 Service unavailable (with message)'), 'Received expected HTTP status line.');
@@ -158,7 +158,7 @@ function testExceptionHandler() {
     $this->assertText($error_pdo_exception['%type'], format_string('Found %type in error page.', $error_pdo_exception));
     $this->assertText($error_pdo_exception['@message'], format_string('Found @message in error page.', $error_pdo_exception));
     $error_details = format_string('in %function (line ', $error_pdo_exception);
-    $this->assertRaw($error_details, format_string("Found '@message' in error page.", array('@message' => $error_details)));
+    $this->assertRaw($error_details, format_string("Found '@message' in error page.", ['@message' => $error_details]));
 
     $this->drupalGet('error-test/trigger-renderer-exception');
     $this->assertTrue(strpos($this->drupalGetHeader(':status'), '500 Service unavailable (with message)'), 'Received expected HTTP status line.');
@@ -185,7 +185,7 @@ function testExceptionHandler() {
    */
   function assertErrorMessage(array $error) {
     $message = new FormattableMarkup('%type: @message in %function (line ', $error);
-    $this->assertRaw($message, format_string('Found error message: @message.', array('@message' => $message)));
+    $this->assertRaw($message, format_string('Found error message: @message.', ['@message' => $message]));
   }
 
   /**
@@ -193,7 +193,7 @@ function assertErrorMessage(array $error) {
    */
   function assertNoErrorMessage(array $error) {
     $message = new FormattableMarkup('%type: @message in %function (line ', $error);
-    $this->assertNoRaw($message, format_string('Did not find error message: @message.', array('@message' => $message)));
+    $this->assertNoRaw($message, format_string('Did not find error message: @message.', ['@message' => $message]));
   }
 
   /**
diff --git a/core/modules/system/src/Tests/System/FrontPageTest.php b/core/modules/system/src/Tests/System/FrontPageTest.php
index 03666fdf1e2d918e6a3ed4d816743c2a1e0a2e77..f5782b708b6faccf5623cf73e5ce1918b18e1dd1 100644
--- a/core/modules/system/src/Tests/System/FrontPageTest.php
+++ b/core/modules/system/src/Tests/System/FrontPageTest.php
@@ -17,7 +17,7 @@ class FrontPageTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'system_test', 'views');
+  public static $modules = ['node', 'system_test', 'views'];
 
   /**
    * The path to a node that is created for testing.
@@ -30,12 +30,12 @@ protected function setUp() {
     parent::setUp();
 
     // Create admin user, log in admin user, and create one node.
-    $this->drupalLogin ($this->drupalCreateUser(array(
+    $this->drupalLogin ($this->drupalCreateUser([
       'access content',
       'administer site configuration',
-    )));
-    $this->drupalCreateContentType(array('type' => 'page'));
-    $this->nodePath = "node/" . $this->drupalCreateNode(array('promote' => 1))->id();
+    ]));
+    $this->drupalCreateContentType(['type' => 'page']);
+    $this->nodePath = "node/" . $this->drupalCreateNode(['promote' => 1])->id();
 
     // Configure 'node' as front page.
     $this->config('system.site')->set('page.front', '/node')->save();
@@ -48,10 +48,10 @@ protected function setUp() {
    */
   public function testDrupalFrontPage() {
     // Create a promoted node to test the <title> tag on the front page view.
-    $settings = array(
+    $settings = [
       'title' => $this->randomMachineName(8),
       'promote' => 1,
-    );
+    ];
     $this->drupalCreateNode($settings);
     $this->drupalGet('');
     $this->assertTitle('Home | Drupal');
@@ -63,9 +63,9 @@ public function testDrupalFrontPage() {
     $this->assertNoText(t('On front page.'), 'Path is not the front page.');
 
     // Change the front page to an invalid path.
-    $edit = array('site_frontpage' => '/kittens');
+    $edit = ['site_frontpage' => '/kittens'];
     $this->drupalPostForm('admin/config/system/site-information', $edit, t('Save configuration'));
-    $this->assertText(t("The path '@path' is either invalid or you do not have access to it.", array('@path' => $edit['site_frontpage'])));
+    $this->assertText(t("The path '@path' is either invalid or you do not have access to it.", ['@path' => $edit['site_frontpage']]));
 
     // Change the front page to a path without a starting slash.
     $edit = ['site_frontpage' => $this->nodePath];
diff --git a/core/modules/system/src/Tests/System/HtaccessTest.php b/core/modules/system/src/Tests/System/HtaccessTest.php
index ad6e09ee596912ff8c77f811cad81ad5f659fab7..fab7a37a34d64c45ace5de73b8b25773b13394f0 100644
--- a/core/modules/system/src/Tests/System/HtaccessTest.php
+++ b/core/modules/system/src/Tests/System/HtaccessTest.php
@@ -16,7 +16,7 @@ class HtaccessTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'path');
+  public static $modules = ['node', 'path'];
 
   /**
    * Get an array of file paths for access testing.
diff --git a/core/modules/system/src/Tests/System/PageNotFoundTest.php b/core/modules/system/src/Tests/System/PageNotFoundTest.php
index f289f0e405bedfb841a1fa501520649c0e165114..d4cd861b88a3eb0c40e6e98bf478d1eea735b2df 100644
--- a/core/modules/system/src/Tests/System/PageNotFoundTest.php
+++ b/core/modules/system/src/Tests/System/PageNotFoundTest.php
@@ -26,12 +26,12 @@ protected function setUp() {
     parent::setUp();
 
     // Create an administrative user.
-    $this->adminUser = $this->drupalCreateUser(array('administer site configuration', 'link to any page'));
+    $this->adminUser = $this->drupalCreateUser(['administer site configuration', 'link to any page']);
     $this->adminUser->roles[] = 'administrator';
     $this->adminUser->save();
 
-    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access user profiles'));
-    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('access user profiles'));
+    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access user profiles']);
+    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, ['access user profiles']);
   }
 
   function testPageNotFound() {
@@ -47,9 +47,9 @@ function testPageNotFound() {
     $this->assertRaw(SafeMarkup::format("The path '%path' has to start with a slash.", ['%path' => $edit['site_404']]));
 
     // Use a custom 404 page.
-    $edit = array(
+    $edit = [
       'site_404' => '/user/' . $this->adminUser->id(),
-    );
+    ];
     $this->drupalPostForm('admin/config/system/site-information', $edit, t('Save configuration'));
 
     $this->drupalGet($this->randomMachineName(10));
diff --git a/core/modules/system/src/Tests/System/PageTitleTest.php b/core/modules/system/src/Tests/System/PageTitleTest.php
index 848eacc8c70e70a636f132d4e957642dc4c4d84b..213339809d122bfe014ab2144e03ff77ba842c5d 100644
--- a/core/modules/system/src/Tests/System/PageTitleTest.php
+++ b/core/modules/system/src/Tests/System/PageTitleTest.php
@@ -29,11 +29,11 @@ class PageTitleTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     $this->drupalPlaceBlock('page_title_block');
 
-    $this->contentUser = $this->drupalCreateUser(array('create page content', 'access content', 'administer themes', 'administer site configuration', 'link to any page'));
+    $this->contentUser = $this->drupalCreateUser(['create page content', 'access content', 'administer themes', 'administer site configuration', 'link to any page']);
     $this->drupalLogin($this->contentUser);
   }
 
@@ -43,10 +43,10 @@ protected function setUp() {
   function testTitleTags() {
     $title = "string with <em>HTML</em>";
     // Generate node content.
-    $edit = array(
+    $edit = [
       'title[0][value]' => '!SimpleTest! ' . $title . $this->randomMachineName(20),
       'body[0][value]' => '!SimpleTest! test body' . $this->randomMachineName(200),
-    );
+    ];
     // Create the node with HTML in the title.
     $this->drupalPostForm('node/add/page', $edit, t('Save'));
 
@@ -69,10 +69,10 @@ function testTitleXSS() {
     $slogan_filtered = Xss::filterAdmin($slogan);
 
     // Set title and slogan.
-    $edit = array(
+    $edit = [
       'site_name'    => $title,
       'site_slogan'  => $slogan,
-    );
+    ];
     $this->drupalPostForm('admin/config/system/site-information', $edit, t('Save configuration'));
 
     // Place branding block with site name and slogan into header region.
@@ -113,9 +113,9 @@ public function testRoutingTitle() {
     $this->assertEqual('Test dynamic title', (string) $result[0]);
 
     // Set some custom translated strings.
-    $this->addCustomTranslations('en', array('' => array(
+    $this->addCustomTranslations('en', ['' => [
       'Static title' => 'Static title translated'
-    )));
+    ]]);
     $this->writeCustomTranslations();
 
     // Ensure that the title got translated.
diff --git a/core/modules/system/src/Tests/System/ResponseGeneratorTest.php b/core/modules/system/src/Tests/System/ResponseGeneratorTest.php
index f54c6516e84c760a7f86de498b897fca473d621b..6197d1d40ae429d9e5f61b59ce641c3a3650d8af 100644
--- a/core/modules/system/src/Tests/System/ResponseGeneratorTest.php
+++ b/core/modules/system/src/Tests/System/ResponseGeneratorTest.php
@@ -16,14 +16,14 @@ class ResponseGeneratorTest extends RESTTestBase {
    *
    * @var array
    */
-  public static $modules = array('hal', 'rest', 'node', 'basic_auth');
+  public static $modules = ['hal', 'rest', 'node', 'basic_auth'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     $permissions = $this->entityPermissions('node', 'view');
     $account = $this->drupalCreateUser($permissions);
diff --git a/core/modules/system/src/Tests/System/ShutdownFunctionsTest.php b/core/modules/system/src/Tests/System/ShutdownFunctionsTest.php
index 99839abaf486316aa79274933dd02ba634ec7345..3a6b3dbf9a23034e5cdcf990cf4d53b5ea1eef95 100644
--- a/core/modules/system/src/Tests/System/ShutdownFunctionsTest.php
+++ b/core/modules/system/src/Tests/System/ShutdownFunctionsTest.php
@@ -16,7 +16,7 @@ class ShutdownFunctionsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('system_test');
+  public static $modules = ['system_test'];
 
   protected function tearDown() {
     // This test intentionally throws an exception in a PHP shutdown function.
@@ -42,8 +42,8 @@ function testShutdownFunctions() {
       // We need to wait to ensure that the shutdown functions have fired.
       sleep(1);
     }
-    $this->assertEqual(\Drupal::state()->get('_system_test_first_shutdown_function'), array($arg1, $arg2));
-    $this->assertEqual(\Drupal::state()->get('_system_test_second_shutdown_function'), array($arg1, $arg2));
+    $this->assertEqual(\Drupal::state()->get('_system_test_first_shutdown_function'), [$arg1, $arg2]);
+    $this->assertEqual(\Drupal::state()->get('_system_test_second_shutdown_function'), [$arg1, $arg2]);
 
     if (!$server_using_fastcgi) {
       // Make sure exceptions displayed through
diff --git a/core/modules/system/src/Tests/System/SiteMaintenanceTest.php b/core/modules/system/src/Tests/System/SiteMaintenanceTest.php
index 84e34921b4c36264c0d4511b69fb14c79698c42a..7f955925db4cf95e11d03eb15d52d3aa0de1255e 100644
--- a/core/modules/system/src/Tests/System/SiteMaintenanceTest.php
+++ b/core/modules/system/src/Tests/System/SiteMaintenanceTest.php
@@ -17,7 +17,7 @@ class SiteMaintenanceTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   protected $adminUser;
 
@@ -29,9 +29,9 @@ protected function setUp() {
     $this->config('system.performance')->set('js.preprocess', 1)->save();
 
     // Create a user allowed to access site in maintenance mode.
-    $this->user = $this->drupalCreateUser(array('access site in maintenance mode'));
+    $this->user = $this->drupalCreateUser(['access site in maintenance mode']);
     // Create an administrative user.
-    $this->adminUser = $this->drupalCreateUser(array('administer site configuration', 'access site in maintenance mode'));
+    $this->adminUser = $this->drupalCreateUser(['administer site configuration', 'access site in maintenance mode']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -44,27 +44,27 @@ protected function testSiteMaintenance() {
     $permission_handler = $this->container->get('user.permissions');
     $permissions = $permission_handler->getPermissions();
     $permission_label = $permissions['access site in maintenance mode']['title'];
-    $permission_message = t('Visitors will only see the maintenance mode message. Only users with the "@permission-label" <a href=":permissions-url">permission</a> will be able to access the site. Authorized users can log in directly via the <a href=":user-login">user login</a> page.', array('@permission-label' => $permission_label, ':permissions-url' => \Drupal::url('user.admin_permissions'), ':user-login' => \Drupal::url('user.login')));
+    $permission_message = t('Visitors will only see the maintenance mode message. Only users with the "@permission-label" <a href=":permissions-url">permission</a> will be able to access the site. Authorized users can log in directly via the <a href=":user-login">user login</a> page.', ['@permission-label' => $permission_label, ':permissions-url' => \Drupal::url('user.admin_permissions'), ':user-login' => \Drupal::url('user.login')]);
     $this->drupalGet(Url::fromRoute('system.site_maintenance_mode'));
     $this->assertRaw($permission_message, 'Found the permission message.');
 
     $this->drupalGet(Url::fromRoute('user.page'));
     // JS should be aggregated, so drupal.js is not in the page source.
-    $links = $this->xpath('//script[contains(@src, :href)]', array(':href' => '/core/misc/drupal.js'));
+    $links = $this->xpath('//script[contains(@src, :href)]', [':href' => '/core/misc/drupal.js']);
     $this->assertFalse(isset($links[0]), 'script /core/misc/drupal.js not in page');
     // Turn on maintenance mode.
-    $edit = array(
+    $edit = [
       'maintenance_mode' => 1,
-    );
+    ];
     $this->drupalPostForm('admin/config/development/maintenance', $edit, t('Save configuration'));
 
-    $admin_message = t('Operating in maintenance mode. <a href=":url">Go online.</a>', array(':url' => \Drupal::url('system.site_maintenance_mode')));
+    $admin_message = t('Operating in maintenance mode. <a href=":url">Go online.</a>', [':url' => \Drupal::url('system.site_maintenance_mode')]);
     $user_message = t('Operating in maintenance mode.');
-    $offline_message = t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => $this->config('system.site')->get('name')));
+    $offline_message = t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', ['@site' => $this->config('system.site')->get('name')]);
 
     $this->drupalGet(Url::fromRoute('user.page'));
     // JS should not be aggregated, so drupal.js is expected in the page source.
-    $links = $this->xpath('//script[contains(@src, :href)]', array(':href' => '/core/misc/drupal.js'));
+    $links = $this->xpath('//script[contains(@src, :href)]', [':href' => '/core/misc/drupal.js']);
     $this->assertTrue(isset($links[0]), 'script /core/misc/drupal.js in page');
     $this->assertRaw($admin_message, 'Found the site maintenance mode message.');
 
@@ -88,10 +88,10 @@ protected function testSiteMaintenance() {
 
     // Log in user and verify that maintenance mode message is displayed
     // directly after login.
-    $edit = array(
+    $edit = [
       'name' => $this->user->getUsername(),
       'pass' => $this->user->pass_raw,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Log in'));
     $this->assertText($user_message);
 
@@ -102,9 +102,9 @@ protected function testSiteMaintenance() {
     $this->assertNoRaw($admin_message, 'Site maintenance mode message not displayed.');
 
     $offline_message = 'Sorry, not online.';
-    $edit = array(
+    $edit = [
       'maintenance_mode_message' => $offline_message,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save configuration'));
 
     // Logout and verify that custom site offline message is displayed.
@@ -118,20 +118,20 @@ protected function testSiteMaintenance() {
     $this->assertText(t('Username or email address'), 'Anonymous users can access user/password');
 
     // Submit password reset form.
-    $edit = array(
+    $edit = [
       'name' => $this->user->getUsername(),
-    );
+    ];
     $this->drupalPostForm('user/password', $edit, t('Submit'));
     $mails = $this->drupalGetMails();
     $start = strpos($mails[0]['body'], 'user/reset/' . $this->user->id());
     $path = substr($mails[0]['body'], $start, 66 + strlen($this->user->id()));
 
     // Log in with temporary login link.
-    $this->drupalPostForm($path, array(), t('Log in'));
+    $this->drupalPostForm($path, [], t('Log in'));
     $this->assertText($user_message);
 
     // Regression test to check if title displays in Bartik on maintenance page.
-    \Drupal::service('theme_handler')->install(array('bartik'));
+    \Drupal::service('theme_handler')->install(['bartik']);
     $this->config('system.theme')->set('default', 'bartik')->save();
 
     // Logout and verify that offline message is displayed in Bartik.
diff --git a/core/modules/system/src/Tests/System/SystemConfigFormTestBase.php b/core/modules/system/src/Tests/System/SystemConfigFormTestBase.php
index 08f741d8c249251d7269de6eaebad57c2e6d04f2..a14fd3107e0f1867833dd7817b6c25fd7e2f9ba0 100644
--- a/core/modules/system/src/Tests/System/SystemConfigFormTestBase.php
+++ b/core/modules/system/src/Tests/System/SystemConfigFormTestBase.php
@@ -43,7 +43,7 @@ abstract class SystemConfigFormTestBase extends WebTestBase {
    */
   public function testConfigForm() {
     // Programmatically submit the given values.
-    $values = array();
+    $values = [];
     foreach ($this->values as $form_key => $data) {
       $values[$form_key] = $data['#value'];
     }
@@ -53,10 +53,10 @@ public function testConfigForm() {
     // Check that the form returns an error when expected, and vice versa.
     $errors = $form_state->getErrors();
     $valid_form = empty($errors);
-    $args = array(
+    $args = [
       '%values' => print_r($values, TRUE),
       '%errors' => $valid_form ? t('None') : implode(' ', $errors),
-    );
+    ];
     $this->assertTrue($valid_form, format_string('Input values: %values<br/>Validation handler errors: %errors', $args));
 
     foreach ($this->values as $data) {
diff --git a/core/modules/system/src/Tests/System/ThemeTest.php b/core/modules/system/src/Tests/System/ThemeTest.php
index 667c97a522039df54bdb20b01078127a545c015f..b75ede9a2117dcd0e9f88cf1a1a97ee5b0770854 100644
--- a/core/modules/system/src/Tests/System/ThemeTest.php
+++ b/core/modules/system/src/Tests/System/ThemeTest.php
@@ -30,9 +30,9 @@ class ThemeTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'view the administration theme', 'administer themes', 'bypass node access', 'administer blocks'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'view the administration theme', 'administer themes', 'bypass node access', 'administer blocks']);
     $this->drupalLogin($this->adminUser);
     $this->node = $this->drupalCreateNode();
     $this->drupalPlaceBlock('local_tasks_block');
@@ -53,50 +53,50 @@ function testThemeSettings() {
 
     // Specify a filesystem path to be used for the logo.
     $file = current($this->drupalGetTestFiles('image'));
-    $file_relative = strtr($file->uri, array('public:/' => PublicStream::basePath()));
+    $file_relative = strtr($file->uri, ['public:/' => PublicStream::basePath()]);
     $default_theme_path = 'core/themes/classy';
 
-    $supported_paths = array(
+    $supported_paths = [
       // Raw stream wrapper URI.
-      $file->uri => array(
+      $file->uri => [
         'form' => file_uri_target($file->uri),
         'src' => file_url_transform_relative(file_create_url($file->uri)),
-      ),
+      ],
       // Relative path within the public filesystem.
-      file_uri_target($file->uri) => array(
+      file_uri_target($file->uri) => [
         'form' => file_uri_target($file->uri),
         'src' => file_url_transform_relative(file_create_url($file->uri)),
-      ),
+      ],
       // Relative path to a public file.
-      $file_relative => array(
+      $file_relative => [
         'form' => $file_relative,
         'src' => file_url_transform_relative(file_create_url($file->uri)),
-      ),
+      ],
       // Relative path to an arbitrary file.
-      'core/misc/druplicon.png' => array(
+      'core/misc/druplicon.png' => [
         'form' => 'core/misc/druplicon.png',
         'src' => base_path() . 'core/misc/druplicon.png',
-      ),
+      ],
       // Relative path to a file in a theme.
-      $default_theme_path . '/logo.svg' => array(
+      $default_theme_path . '/logo.svg' => [
         'form' => $default_theme_path . '/logo.svg',
         'src' => base_path() . $default_theme_path . '/logo.svg',
-      ),
-    );
+      ],
+    ];
     foreach ($supported_paths as $input => $expected) {
-      $edit = array(
+      $edit = [
         'default_logo' => FALSE,
         'logo_path' => $input,
-      );
+      ];
       $this->drupalPostForm('admin/appearance/settings', $edit, t('Save configuration'));
       $this->assertNoText('The custom logo path is invalid.');
       $this->assertFieldByName('logo_path', $expected['form']);
 
       // Verify logo path examples.
-      $elements = $this->xpath('//div[contains(@class, :item)]/div[@class=:description]/code', array(
+      $elements = $this->xpath('//div[contains(@class, :item)]/div[@class=:description]/code', [
         ':item' => 'js-form-item-logo-path',
         ':description' => 'description',
-      ));
+      ]);
       // Expected default values (if all else fails).
       $implicit_public_file = 'logo.svg';
       $explicit_file = 'public://logo.svg';
@@ -105,7 +105,7 @@ function testThemeSettings() {
       if (file_uri_scheme($input) == 'public') {
         $implicit_public_file = file_uri_target($input);
         $explicit_file = $input;
-        $local_file = strtr($input, array('public:/' => PublicStream::basePath()));
+        $local_file = strtr($input, ['public:/' => PublicStream::basePath()]);
       }
       // Adjust for fully qualified stream wrapper URI elsewhere.
       elseif (file_uri_scheme($input) !== FALSE) {
@@ -125,13 +125,13 @@ function testThemeSettings() {
       // branding block.
       $this->drupalPlaceBlock('system_branding_block', ['region' => 'header']);
       $this->drupalGet('');
-      $elements = $this->xpath('//header//a[@rel=:rel]/img', array(
+      $elements = $this->xpath('//header//a[@rel=:rel]/img', [
           ':rel' => 'home',
-        )
+        ]
       );
       $this->assertEqual((string) $elements[0]['src'], $expected['src']);
     }
-    $unsupported_paths = array(
+    $unsupported_paths = [
       // Stream wrapper URI to non-existing file.
       'public://whatever.png',
       'private://whatever.png',
@@ -153,23 +153,23 @@ function testThemeSettings() {
       '/core/misc/whatever.png',
       // Absolute paths to any local file (even if it exists).
       drupal_realpath($file->uri),
-    );
+    ];
     $this->drupalGet('admin/appearance/settings');
     foreach ($unsupported_paths as $path) {
-      $edit = array(
+      $edit = [
         'default_logo' => FALSE,
         'logo_path' => $path,
-      );
+      ];
       $this->drupalPostForm(NULL, $edit, t('Save configuration'));
       $this->assertText('The custom logo path is invalid.');
     }
 
     // Upload a file to use for the logo.
-    $edit = array(
+    $edit = [
       'default_logo' => FALSE,
       'logo_path' => '',
       'files[logo_upload]' => drupal_realpath($file->uri),
-    );
+    ];
     $this->drupalPostForm('admin/appearance/settings', $edit, t('Save configuration'));
 
     $fields = $this->xpath($this->constructFieldXpath('name', 'logo_path'));
@@ -177,13 +177,13 @@ function testThemeSettings() {
 
     $this->drupalPlaceBlock('system_branding_block', ['region' => 'header']);
     $this->drupalGet('');
-    $elements = $this->xpath('//header//a[@rel=:rel]/img', array(
+    $elements = $this->xpath('//header//a[@rel=:rel]/img', [
         ':rel' => 'home',
-      )
+      ]
     );
     $this->assertEqual($elements[0]['src'], file_url_transform_relative(file_create_url($uploaded_filename)));
 
-    $this->container->get('theme_handler')->install(array('bartik'));
+    $this->container->get('theme_handler')->install(['bartik']);
 
     // Ensure only valid themes are listed in the local tasks.
     $this->drupalPlaceBlock('local_tasks_block', ['region' => 'header']);
@@ -242,13 +242,13 @@ function testThemeSettingsLogo() {
    * Test the administration theme functionality.
    */
   function testAdministrationTheme() {
-    $this->container->get('theme_handler')->install(array('seven'));
+    $this->container->get('theme_handler')->install(['seven']);
 
     // Install an administration theme and show it on the node admin pages.
-    $edit = array(
+    $edit = [
       'admin_theme' => 'seven',
       'use_admin_theme' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
 
     $this->drupalGet('admin/config');
@@ -264,9 +264,9 @@ function testAdministrationTheme() {
     $this->assertRaw('core/themes/seven', 'Administration theme used on the edit content page.');
 
     // Disable the admin theme on the node admin pages.
-    $edit = array(
+    $edit = [
       'use_admin_theme' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
 
     $this->drupalGet('admin/config');
@@ -284,10 +284,10 @@ function testAdministrationTheme() {
     $this->assertRaw('core/themes/classy', 'Site default theme used on the add content page.');
 
     // Reset to the default theme settings.
-    $edit = array(
+    $edit = [
       'admin_theme' => '0',
       'use_admin_theme' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
 
     $this->drupalGet('admin');
@@ -304,11 +304,11 @@ function testSwitchDefaultTheme() {
     /** @var \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler */
     $theme_handler = \Drupal::service('theme_handler');
     // First, install Stark and set it as the default theme programmatically.
-    $theme_handler->install(array('stark'));
+    $theme_handler->install(['stark']);
     $this->config('system.theme')->set('default', 'stark')->save();
 
     // Install Bartik and set it as the default theme.
-    $theme_handler->install(array('bartik'));
+    $theme_handler->install(['bartik']);
     $this->drupalGet('admin/appearance');
     $this->clickLink(t('Set as default'));
     $this->assertEqual($this->config('system.theme')->get('default'), 'bartik');
@@ -332,13 +332,13 @@ function testSwitchDefaultTheme() {
    */
   function testInvalidTheme() {
     // theme_page_test_system_info_alter() un-hides all hidden themes.
-    $this->container->get('module_installer')->install(array('theme_page_test'));
+    $this->container->get('module_installer')->install(['theme_page_test']);
     // Clear the system_list() and theme listing cache to pick up the change.
     $this->container->get('theme_handler')->reset();
     $this->drupalGet('admin/appearance');
-    $this->assertText(t('This theme requires the base theme @base_theme to operate correctly.', array('@base_theme' => 'not_real_test_basetheme')));
-    $this->assertText(t('This theme requires the base theme @base_theme to operate correctly.', array('@base_theme' => 'test_invalid_basetheme')));
-    $this->assertText(t('This theme requires the theme engine @theme_engine to operate correctly.', array('@theme_engine' => 'not_real_engine')));
+    $this->assertText(t('This theme requires the base theme @base_theme to operate correctly.', ['@base_theme' => 'not_real_test_basetheme']));
+    $this->assertText(t('This theme requires the base theme @base_theme to operate correctly.', ['@base_theme' => 'test_invalid_basetheme']));
+    $this->assertText(t('This theme requires the theme engine @theme_engine to operate correctly.', ['@theme_engine' => 'not_real_engine']));
     // Check for the error text of a theme with the wrong core version.
     $this->assertText("This theme is not compatible with Drupal 8.x. Check that the .info.yml file contains the correct 'core' value.");
     // Check for the error text of a theme without a content region.
@@ -350,13 +350,13 @@ function testInvalidTheme() {
    */
   function testUninstallingThemes() {
     // Install Bartik and set it as the default theme.
-    \Drupal::service('theme_handler')->install(array('bartik'));
+    \Drupal::service('theme_handler')->install(['bartik']);
     // Set up seven as the admin theme.
-    \Drupal::service('theme_handler')->install(array('seven'));
-    $edit = array(
+    \Drupal::service('theme_handler')->install(['seven']);
+    $edit = [
       'admin_theme' => 'seven',
       'use_admin_theme' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
     $this->drupalGet('admin/appearance');
     $this->clickLink(t('Set as default'));
@@ -370,12 +370,12 @@ function testUninstallingThemes() {
     $this->assertNoRaw('Uninstall Classy theme', 'A link to uninstall the Classy theme does not appear on the theme settings page.');
 
     // Install Stark and set it as the default theme.
-    \Drupal::service('theme_handler')->install(array('stark'));
+    \Drupal::service('theme_handler')->install(['stark']);
 
-    $edit = array(
+    $edit = [
       'admin_theme' => 'stark',
       'use_admin_theme' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
 
     // Check that seven can be uninstalled now.
diff --git a/core/modules/system/src/Tests/System/UncaughtExceptionTest.php b/core/modules/system/src/Tests/System/UncaughtExceptionTest.php
index c3ef82dceb1d7a7ebd5e6b9efea1a716577cb4c8..b66837e1c7bd2eda1e7fe44de16258d0b4a2a10b 100644
--- a/core/modules/system/src/Tests/System/UncaughtExceptionTest.php
+++ b/core/modules/system/src/Tests/System/UncaughtExceptionTest.php
@@ -24,7 +24,7 @@ class UncaughtExceptionTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('error_service_test');
+  public static $modules = ['error_service_test'];
 
   /**
    * {@inheritdoc}
@@ -224,14 +224,14 @@ public function testLostDatabaseConnection() {
 
     // We simulate a broken database connection by rewrite settings.php to no
     // longer have the proper data.
-    $settings['databases']['default']['default']['username'] = (object) array(
+    $settings['databases']['default']['default']['username'] = (object) [
       'value' => $incorrect_username,
       'required' => TRUE,
-    );
-    $settings['databases']['default']['default']['password'] = (object) array(
+    ];
+    $settings['databases']['default']['default']['password'] = (object) [
       'value' => $this->randomMachineName(16),
       'required' => TRUE,
-    );
+    ];
 
     $this->writeSettings($settings);
 
diff --git a/core/modules/system/src/Tests/Theme/EngineTwigTest.php b/core/modules/system/src/Tests/Theme/EngineTwigTest.php
index 58661d185f84aeba727c2d10987626d369e49cdf..9327c9426c171061eef7f09c930975aa3aea7bf4 100644
--- a/core/modules/system/src/Tests/Theme/EngineTwigTest.php
+++ b/core/modules/system/src/Tests/Theme/EngineTwigTest.php
@@ -18,11 +18,11 @@ class EngineTwigTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test', 'twig_theme_test');
+  public static $modules = ['theme_test', 'twig_theme_test'];
 
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
   }
 
   /**
@@ -45,13 +45,13 @@ public function testTwigUrlGenerator() {
     $this->drupalGet('twig-theme-test/url-generator');
     // Find the absolute URL of the current site.
     $url_generator = $this->container->get('url_generator');
-    $expected = array(
+    $expected = [
       'path (as route) not absolute: ' . $url_generator->generateFromRoute('user.register'),
-      'url (as route) absolute: ' . $url_generator->generateFromRoute('user.register', array(), array('absolute' => TRUE)),
-      'path (as route) not absolute with fragment: ' . $url_generator->generateFromRoute('user.register', array(), array('fragment' => 'bottom')),
-      'url (as route) absolute despite option: ' . $url_generator->generateFromRoute('user.register', array(), array('absolute' => TRUE)),
-      'url (as route) absolute with fragment: ' . $url_generator->generateFromRoute('user.register', array(), array('absolute' => TRUE, 'fragment' => 'bottom')),
-    );
+      'url (as route) absolute: ' . $url_generator->generateFromRoute('user.register', [], ['absolute' => TRUE]),
+      'path (as route) not absolute with fragment: ' . $url_generator->generateFromRoute('user.register', [], ['fragment' => 'bottom']),
+      'url (as route) absolute despite option: ' . $url_generator->generateFromRoute('user.register', [], ['absolute' => TRUE]),
+      'url (as route) absolute with fragment: ' . $url_generator->generateFromRoute('user.register', [], ['absolute' => TRUE, 'fragment' => 'bottom']),
+    ];
 
     // Verify that url() has the ability to bubble cacheability metadata:
     // absolute URLs should bubble the 'url.site' cache context. (This only
diff --git a/core/modules/system/src/Tests/Theme/EntityFilteringThemeTest.php b/core/modules/system/src/Tests/Theme/EntityFilteringThemeTest.php
index 2e55df8a102430c50c13a57e78e18b6c67bbcbe5..f7ebd71e88d9a560a4e6a828ba594f704136c820 100644
--- a/core/modules/system/src/Tests/Theme/EntityFilteringThemeTest.php
+++ b/core/modules/system/src/Tests/Theme/EntityFilteringThemeTest.php
@@ -85,7 +85,7 @@ protected function setUp() {
     \Drupal::service('theme_handler')->install(array_keys($this->themes));
 
     // Create a test user.
-    $this->user = $this->drupalCreateUser(array('access content', 'access user profiles'));
+    $this->user = $this->drupalCreateUser(['access content', 'access user profiles']);
     $this->user->name = $this->xssLabel;
     $this->user->save();
     $this->drupalLogin($this->user);
@@ -100,22 +100,22 @@ protected function setUp() {
     // Add a comment field.
     $this->addDefaultCommentField('node', 'article', 'comment', CommentItemInterface::OPEN);
     // Create a test node tagged with the test term.
-    $this->node = $this->drupalCreateNode(array(
+    $this->node = $this->drupalCreateNode([
       'title' => $this->xssLabel,
       'type' => 'article',
       'promote' => NodeInterface::PROMOTED,
-      'field_tags' => array(array('target_id' => $this->term->id())),
-    ));
+      'field_tags' => [['target_id' => $this->term->id()]],
+    ]);
 
     // Create a test comment on the test node.
-    $this->comment = Comment::create(array(
+    $this->comment = Comment::create([
       'entity_id' => $this->node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment',
       'status' => CommentInterface::PUBLISHED,
       'subject' => $this->xssLabel,
-      'comment_body' => array($this->randomMachineName()),
-    ));
+      'comment_body' => [$this->randomMachineName()],
+    ]);
     $this->comment->save();
   }
 
@@ -124,12 +124,12 @@ protected function setUp() {
    */
   function testThemedEntity() {
     // Check paths where various view modes of the entities are rendered.
-    $paths = array(
+    $paths = [
       'user',
       'node',
       'node/' . $this->node->id(),
       'taxonomy/term/' . $this->term->id(),
-    );
+    ];
 
     // Check each path in all available themes.
     foreach ($this->themes as $name => $theme) {
diff --git a/core/modules/system/src/Tests/Theme/FunctionsTest.php b/core/modules/system/src/Tests/Theme/FunctionsTest.php
index fa5a2ac48f69b6fac7c5b7c5156980313380cea1..a8fec41f2149edc57ec6b8b1b7e45b0f69a5c3b2 100644
--- a/core/modules/system/src/Tests/Theme/FunctionsTest.php
+++ b/core/modules/system/src/Tests/Theme/FunctionsTest.php
@@ -21,117 +21,117 @@ class FunctionsTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('router_test');
+  public static $modules = ['router_test'];
 
   /**
    * Tests item-list.html.twig.
    */
   function testItemList() {
     // Verify that empty items produce no output.
-    $variables = array();
+    $variables = [];
     $expected = '';
     $this->assertThemeOutput('item_list', $variables, $expected, 'Empty %callback generates no output.');
 
     // Verify that empty items with title produce no output.
-    $variables = array();
+    $variables = [];
     $variables['title'] = 'Some title';
     $expected = '';
     $this->assertThemeOutput('item_list', $variables, $expected, 'Empty %callback with title generates no output.');
 
     // Verify that empty items produce the empty string.
-    $variables = array();
+    $variables = [];
     $variables['empty'] = 'No items found.';
     $expected = '<div class="item-list">No items found.</div>';
     $this->assertThemeOutput('item_list', $variables, $expected, 'Empty %callback generates empty string.');
 
     // Verify that empty items produce the empty string with title.
-    $variables = array();
+    $variables = [];
     $variables['title'] = 'Some title';
     $variables['empty'] = 'No items found.';
     $expected = '<div class="item-list"><h3>Some title</h3>No items found.</div>';
     $this->assertThemeOutput('item_list', $variables, $expected, 'Empty %callback generates empty string with title.');
 
     // Verify that title set to 0 is output.
-    $variables = array();
+    $variables = [];
     $variables['title'] = 0;
     $variables['empty'] = 'No items found.';
     $expected = '<div class="item-list"><h3>0</h3>No items found.</div>';
     $this->assertThemeOutput('item_list', $variables, $expected, '%callback with title set to 0 generates a title.');
 
     // Verify that title set to a render array is output.
-    $variables = array();
-    $variables['title'] = array(
+    $variables = [];
+    $variables['title'] = [
       '#markup' => '<span>Render array</span>',
-    );
+    ];
     $variables['empty'] = 'No items found.';
     $expected = '<div class="item-list"><h3><span>Render array</span></h3>No items found.</div>';
     $this->assertThemeOutput('item_list', $variables, $expected, '%callback with title set to a render array generates a title.');
 
     // Verify that empty text is not displayed when there are list items.
-    $variables = array();
+    $variables = [];
     $variables['title'] = 'Some title';
     $variables['empty'] = 'No items found.';
-    $variables['items'] = array('Un', 'Deux', 'Trois');
+    $variables['items'] = ['Un', 'Deux', 'Trois'];
     $expected = '<div class="item-list"><h3>Some title</h3><ul><li>Un</li><li>Deux</li><li>Trois</li></ul></div>';
     $this->assertThemeOutput('item_list', $variables, $expected, '%callback does not print empty text when there are list items.');
 
     // Verify nested item lists.
-    $variables = array();
+    $variables = [];
     $variables['title'] = 'Some title';
-    $variables['attributes'] = array(
+    $variables['attributes'] = [
       'id' => 'parentlist',
-    );
-    $variables['items'] = array(
+    ];
+    $variables['items'] = [
       // A plain string value forms an own item.
       'a',
       // Items can be fully-fledged render arrays with their own attributes.
-      array(
-        '#wrapper_attributes' => array(
+      [
+        '#wrapper_attributes' => [
           'id' => 'item-id-b',
-        ),
+        ],
         '#markup' => 'b',
-        'childlist' => array(
+        'childlist' => [
           '#theme' => 'item_list',
-          '#attributes' => array('id' => 'blist'),
+          '#attributes' => ['id' => 'blist'],
           '#list_type' => 'ol',
-          '#items' => array(
+          '#items' => [
             'ba',
-            array(
+            [
               '#markup' => 'bb',
-              '#wrapper_attributes' => array('class' => array('item-class-bb')),
-            ),
-          ),
-        ),
-      ),
+              '#wrapper_attributes' => ['class' => ['item-class-bb']],
+            ],
+          ],
+        ],
+      ],
       // However, items can also be child #items.
-      array(
+      [
         '#markup' => 'c',
-        'childlist' => array(
-          '#attributes' => array('id' => 'clist'),
+        'childlist' => [
+          '#attributes' => ['id' => 'clist'],
           'ca',
-          array(
+          [
             '#markup' => 'cb',
-            '#wrapper_attributes' => array('class' => array('item-class-cb')),
-            'children' => array(
+            '#wrapper_attributes' => ['class' => ['item-class-cb']],
+            'children' => [
               'cba',
               'cbb',
-            ),
-          ),
+            ],
+          ],
           'cc',
-        ),
-      ),
+        ],
+      ],
       // Use #markup to be able to specify #wrapper_attributes.
-      array(
+      [
         '#markup' => 'd',
-        '#wrapper_attributes' => array('id' => 'item-id-d'),
-      ),
+        '#wrapper_attributes' => ['id' => 'item-id-d'],
+      ],
       // An empty item with attributes.
-      array(
-        '#wrapper_attributes' => array('id' => 'item-id-e'),
-      ),
+      [
+        '#wrapper_attributes' => ['id' => 'item-id-e'],
+      ],
       // Lastly, another plain string item.
       'f',
-    );
+    ];
 
     $inner_b = '<div class="item-list"><ol id="blist">';
     $inner_b .= '<li>ba</li>';
@@ -171,47 +171,47 @@ function testLinks() {
     // \Drupal\Core\Utility\LinkGeneratorInterface::generate() method to compare
     // the active link correctly.
     $original_query = \Drupal::request()->query->all();
-    \Drupal::request()->query->replace(array());
+    \Drupal::request()->query->replace([]);
     // Verify that empty variables produce no output.
-    $variables = array();
+    $variables = [];
     $expected = '';
     $this->assertThemeOutput('links', $variables, $expected, 'Empty %callback generates no output.');
 
-    $variables = array();
+    $variables = [];
     $variables['heading'] = 'Some title';
     $expected = '';
     $this->assertThemeOutput('links', $variables, $expected, 'Empty %callback with heading generates no output.');
 
     // Verify that a list of links is properly rendered.
-    $variables = array();
-    $variables['attributes'] = array('id' => 'somelinks');
-    $variables['links'] = array(
-      'a link' => array(
+    $variables = [];
+    $variables['attributes'] = ['id' => 'somelinks'];
+    $variables['links'] = [
+      'a link' => [
         'title' => 'A <link>',
         'url' => Url::fromUri('base:a/link'),
-      ),
-      'plain text' => array(
+      ],
+      'plain text' => [
         'title' => 'Plain "text"',
-      ),
-      'html text' => array(
-        'title' => SafeMarkup::format('<span class="unescaped">@text</span>', array('@text' => 'potentially unsafe text that <should> be escaped')),
-      ),
-      'front page' => array(
+      ],
+      'html text' => [
+        'title' => SafeMarkup::format('<span class="unescaped">@text</span>', ['@text' => 'potentially unsafe text that <should> be escaped']),
+      ],
+      'front page' => [
         'title' => 'Front page',
         'url' => Url::fromRoute('<front>'),
-      ),
-      'router-test' => array(
+      ],
+      'router-test' => [
         'title' => 'Test route',
         'url' => Url::fromRoute('router_test.1'),
-      ),
-      'query-test' => array(
+      ],
+      'query-test' => [
         'title' => 'Query test route',
         'url' => Url::fromRoute('router_test.1'),
-        'query' => array(
+        'query' => [
           'key' => 'value',
-        )
-      ),
-    );
+        ]
+      ],
+    ];
 
     $expected_links = '';
     $expected_links .= '<ul id="somelinks">';
@@ -220,7 +220,7 @@ function testLinks() {
     $expected_links .= '<li class="html-text"><span class="unescaped">' . Html::escape('potentially unsafe text that <should> be escaped') . '</span></li>';
     $expected_links .= '<li class="front-page"><a href="' . Url::fromRoute('<front>')->toString() . '">' . Html::escape('Front page') . '</a></li>';
     $expected_links .= '<li class="router-test"><a href="' . \Drupal::urlGenerator()->generate('router_test.1') . '">' . Html::escape('Test route') . '</a></li>';
-    $query = array('key' => 'value');
+    $query = ['key' => 'value'];
     $expected_links .= '<li class="query-test"><a href="' . \Drupal::urlGenerator()->generate('router_test.1', $query) . '">' . Html::escape('Query test route') . '</a></li>';
     $expected_links .= '</ul>';
 
@@ -234,25 +234,25 @@ function testLinks() {
     \Drupal::request()->query->replace($original_query);
 
     // Verify that passing an array as heading works (core support).
-    $variables['heading'] = array(
+    $variables['heading'] = [
       'text' => 'Links heading',
       'level' => 'h3',
-      'attributes' => array('class' => array('heading')),
-    );
+      'attributes' => ['class' => ['heading']],
+    ];
     $expected_heading = '<h3 class="heading">Links heading</h3>';
     $expected = $expected_heading . $expected_links;
     $this->assertThemeOutput('links', $variables, $expected);
 
     // Verify that passing attributes for the heading works.
-    $variables['heading'] = array('text' => 'Links heading', 'level' => 'h3', 'attributes' => array('id' => 'heading'));
+    $variables['heading'] = ['text' => 'Links heading', 'level' => 'h3', 'attributes' => ['id' => 'heading']];
     $expected_heading = '<h3 id="heading">Links heading</h3>';
     $expected = $expected_heading . $expected_links;
     $this->assertThemeOutput('links', $variables, $expected);
 
     // Verify that passing attributes for the links work.
-    $variables['links']['plain text']['attributes'] = array(
-      'class' => array('a/class'),
-    );
+    $variables['links']['plain text']['attributes'] = [
+      'class' => ['a/class'],
+    ];
     $expected_links = '';
     $expected_links .= '<ul id="somelinks">';
     $expected_links .= '<li class="a-link"><a href="' . Url::fromUri('base:a/link')->toString() . '">' . Html::escape('A <link>') . '</a></li>';
@@ -260,14 +260,14 @@ function testLinks() {
     $expected_links .= '<li class="html-text"><span class="unescaped">' . Html::escape('potentially unsafe text that <should> be escaped') . '</span></li>';
     $expected_links .= '<li class="front-page"><a href="' . Url::fromRoute('<front>')->toString() . '">' . Html::escape('Front page') . '</a></li>';
     $expected_links .= '<li class="router-test"><a href="' . \Drupal::urlGenerator()->generate('router_test.1') . '">' . Html::escape('Test route') . '</a></li>';
-    $query = array('key' => 'value');
+    $query = ['key' => 'value'];
     $expected_links .= '<li class="query-test"><a href="' . \Drupal::urlGenerator()->generate('router_test.1', $query) . '">' . Html::escape('Query test route') . '</a></li>';
     $expected_links .= '</ul>';
     $expected = $expected_heading . $expected_links;
     $this->assertThemeOutput('links', $variables, $expected);
 
     // Verify the data- attributes for setting the "active" class on links.
-    \Drupal::currentUser()->setAccount(new UserSession(array('uid' => 1)));
+    \Drupal::currentUser()->setAccount(new UserSession(['uid' => 1]));
     $variables['set_active_class'] = TRUE;
     $expected_links = '';
     $expected_links .= '<ul id="somelinks">';
@@ -276,7 +276,7 @@ function testLinks() {
     $expected_links .= '<li class="html-text"><span class="unescaped">' . Html::escape('potentially unsafe text that <should> be escaped') . '</span></li>';
     $expected_links .= '<li data-drupal-link-system-path="&lt;front&gt;" class="front-page"><a href="' . Url::fromRoute('<front>')->toString() . '" data-drupal-link-system-path="&lt;front&gt;">' . Html::escape('Front page') . '</a></li>';
     $expected_links .= '<li data-drupal-link-system-path="router_test/test1" class="router-test"><a href="' . \Drupal::urlGenerator()->generate('router_test.1') . '" data-drupal-link-system-path="router_test/test1">' . Html::escape('Test route') . '</a></li>';
-    $query = array('key' => 'value');
+    $query = ['key' => 'value'];
     $encoded_query = Html::escape(Json::encode($query));
     $expected_links .= '<li data-drupal-link-query="' . $encoded_query . '" data-drupal-link-system-path="router_test/test1" class="query-test"><a href="' . \Drupal::urlGenerator()->generate('router_test.1', $query) . '" data-drupal-link-query="' . $encoded_query . '" data-drupal-link-system-path="router_test/test1">' . Html::escape('Query test route') . '</a></li>';
     $expected_links .= '</ul>';
@@ -306,33 +306,33 @@ function testIndexedKeyedLinks() {
     // Verify that a list of links is properly rendered.
     $variables = [];
     $variables['attributes'] = ['id' => 'somelinks'];
-    $variables['links'] = array(
-      array(
+    $variables['links'] = [
+      [
         'title' => 'A <link>',
         'url' => Url::fromUri('base:a/link'),
-      ),
-      array(
+      ],
+      [
         'title' => 'Plain "text"',
-      ),
-      array(
-        'title' => SafeMarkup::format('<span class="unescaped">@text</span>', array('@text' => 'potentially unsafe text that <should> be escaped')),
-      ),
-      array(
+      ],
+      [
+        'title' => SafeMarkup::format('<span class="unescaped">@text</span>', ['@text' => 'potentially unsafe text that <should> be escaped']),
+      ],
+      [
         'title' => 'Front page',
         'url' => Url::fromRoute('<front>'),
-      ),
-      array(
+      ],
+      [
         'title' => 'Test route',
         'url' => Url::fromRoute('router_test.1'),
-      ),
-      array(
+      ],
+      [
         'title' => 'Query test route',
         'url' => Url::fromRoute('router_test.1'),
-        'query' => array(
+        'query' => [
           'key' => 'value',
-        )
-      ),
-    );
+        ]
+      ],
+    ];
 
     $expected_links = '';
     $expected_links .= '<ul id="somelinks">';
@@ -388,7 +388,7 @@ function testIndexedKeyedLinks() {
     $this->assertThemeOutput('links', $variables, $expected);
 
     // Verify the data- attributes for setting the "active" class on links.
-    \Drupal::currentUser()->setAccount(new UserSession(array('uid' => 1)));
+    \Drupal::currentUser()->setAccount(new UserSession(['uid' => 1]));
     $variables['set_active_class'] = TRUE;
     $expected_links = '';
     $expected_links .= '<ul id="somelinks">';
@@ -411,55 +411,55 @@ function testIndexedKeyedLinks() {
   function testDrupalPreRenderLinks() {
     // Define the base array to be rendered, containing a variety of different
     // kinds of links.
-    $base_array = array(
+    $base_array = [
       '#theme' => 'links',
-      '#pre_render' => array('drupal_pre_render_links'),
-      '#links' => array(
-        'parent_link' => array(
+      '#pre_render' => ['drupal_pre_render_links'],
+      '#links' => [
+        'parent_link' => [
           'title' => 'Parent link original',
           'url' => Url::fromRoute('router_test.1'),
-        ),
-      ),
-      'first_child' => array(
+        ],
+      ],
+      'first_child' => [
         '#theme' => 'links',
-        '#links' => array(
+        '#links' => [
           // This should be rendered if 'first_child' is rendered separately,
           // but ignored if the parent is being rendered (since it duplicates
           // one of the parent's links).
-          'parent_link' => array(
+          'parent_link' => [
             'title' => 'Parent link copy',
             'url' => Url::fromRoute('router_test.6'),
-          ),
+          ],
           // This should always be rendered.
-          'first_child_link' => array(
+          'first_child_link' => [
             'title' => 'First child link',
             'url' => Url::fromRoute('router_test.7'),
-          ),
-        ),
-      ),
+          ],
+        ],
+      ],
       // This should always be rendered as part of the parent.
-      'second_child' => array(
+      'second_child' => [
         '#theme' => 'links',
-        '#links' => array(
-          'second_child_link' => array(
+        '#links' => [
+          'second_child_link' => [
             'title' => 'Second child link',
             'url' => Url::fromRoute('router_test.8'),
-          ),
-        ),
-      ),
+          ],
+        ],
+      ],
       // This should never be rendered, since the user does not have access to
       // it.
-      'third_child' => array(
+      'third_child' => [
         '#theme' => 'links',
-        '#links' => array(
-          'third_child_link' => array(
+        '#links' => [
+          'third_child_link' => [
             'title' => 'Third child link',
             'url' => Url::fromRoute('router_test.9'),
-          ),
-        ),
+          ],
+        ],
         '#access' => FALSE,
-      ),
-    );
+      ],
+    ];
 
     // Start with a fresh copy of the base array, and try rendering the entire
     // thing. We expect a single <ul> with appropriate links contained within
@@ -508,7 +508,7 @@ function testDrupalPreRenderLinks() {
    */
   function testImage() {
     // Test that data URIs work with theme_image().
-    $variables = array();
+    $variables = [];
     $variables['uri'] = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==';
     $variables['alt'] = 'Data URI image of a red dot';
     $expected = '<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==" alt="Data URI image of a red dot" />' . "\n";
diff --git a/core/modules/system/src/Tests/Theme/HtmlAttributesTest.php b/core/modules/system/src/Tests/Theme/HtmlAttributesTest.php
index f103caaa79cdc4932ebd22819c9791dd2e1b9c2c..b9babae5645fc55e033db33a5ce92004a353ec51 100644
--- a/core/modules/system/src/Tests/Theme/HtmlAttributesTest.php
+++ b/core/modules/system/src/Tests/Theme/HtmlAttributesTest.php
@@ -16,7 +16,7 @@ class HtmlAttributesTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test');
+  public static $modules = ['theme_test'];
 
   /**
    * Tests that attributes in the 'html' and 'body' elements can be altered.
diff --git a/core/modules/system/src/Tests/Theme/ThemeSuggestionsAlterTest.php b/core/modules/system/src/Tests/Theme/ThemeSuggestionsAlterTest.php
index 75e52c9b8830f38293d257f964b27ee1aae5d380..706fd267306c5b91764031448aa718f1fa234cb8 100644
--- a/core/modules/system/src/Tests/Theme/ThemeSuggestionsAlterTest.php
+++ b/core/modules/system/src/Tests/Theme/ThemeSuggestionsAlterTest.php
@@ -17,11 +17,11 @@ class ThemeSuggestionsAlterTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test');
+  public static $modules = ['theme_test'];
 
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
   }
 
   /**
@@ -57,7 +57,7 @@ function testGeneralSuggestionsAlter() {
 
     // Enable the theme_suggestions_test module to test modules implementing
     // suggestions alter hooks.
-    \Drupal::service('module_installer')->install(array('theme_suggestions_test'));
+    \Drupal::service('module_installer')->install(['theme_suggestions_test']);
     $this->resetAll();
     $this->drupalGet('theme-test/general-suggestion-alter');
     $this->assertText('Template overridden based on new theme suggestion provided by a module via hook_theme_suggestions_alter().');
@@ -79,7 +79,7 @@ function testTemplateSuggestionsAlter() {
 
     // Enable the theme_suggestions_test module to test modules implementing
     // suggestions alter hooks.
-    \Drupal::service('module_installer')->install(array('theme_suggestions_test'));
+    \Drupal::service('module_installer')->install(['theme_suggestions_test']);
     $this->resetAll();
     $this->drupalGet('theme-test/suggestion-alter');
     $this->assertText('Template overridden based on new theme suggestion provided by a module via hook_theme_suggestions_HOOK_alter().');
@@ -103,7 +103,7 @@ function testSpecificSuggestionsAlter() {
     $this->assertText('theme_test_specific_suggestions__variant', 'Specific theme call is added to the suggestions array.');
 
     // Ensure that the base hook is used to determine the suggestion alter hook.
-    \Drupal::service('module_installer')->install(array('theme_suggestions_test'));
+    \Drupal::service('module_installer')->install(['theme_suggestions_test']);
     $this->resetAll();
     $this->drupalGet('theme-test/specific-suggestion-alter');
     $this->assertText('Template overridden based on suggestion alter hook determined by the base hook.');
@@ -126,7 +126,7 @@ function testThemeFunctionSuggestionsAlter() {
 
     // Enable the theme_suggestions_test module to test modules implementing
     // suggestions alter hooks.
-    \Drupal::service('module_installer')->install(array('theme_suggestions_test'));
+    \Drupal::service('module_installer')->install(['theme_suggestions_test']);
     $this->resetAll();
     $this->drupalGet('theme-test/function-suggestion-alter');
     $this->assertText('Theme function overridden based on new theme suggestion provided by a module.');
@@ -143,7 +143,7 @@ public function testSuggestionsAlterInclude() {
     // Enable theme_suggestions_test module and make two requests to make sure
     // the include file is always loaded. The file will always be included for
     // the first request because the theme registry is being rebuilt.
-    \Drupal::service('module_installer')->install(array('theme_suggestions_test'));
+    \Drupal::service('module_installer')->install(['theme_suggestions_test']);
     $this->resetAll();
     $this->drupalGet('theme-test/suggestion-alter-include');
     $this->assertText('Function suggested via suggestion alter hook found in include file.', 'Include file loaded for initial request.');
@@ -162,7 +162,7 @@ function testExecutionOrder() {
     $this->config('system.theme')
       ->set('default', 'test_theme')
       ->save();
-    \Drupal::service('module_installer')->install(array('theme_suggestions_test'));
+    \Drupal::service('module_installer')->install(['theme_suggestions_test']);
     $this->resetAll();
 
     // Send two requests so that we get all the messages we've set via
@@ -170,15 +170,15 @@ function testExecutionOrder() {
     $this->drupalGet('theme-test/suggestion-alter');
     // Ensure that the order is first by extension, then for a given extension,
     // the hook-specific one after the generic one.
-    $expected = array(
+    $expected = [
       'theme_suggestions_test_theme_suggestions_alter() executed.',
       'theme_suggestions_test_theme_suggestions_theme_test_suggestions_alter() executed.',
       'theme_test_theme_suggestions_alter() executed.',
       'theme_test_theme_suggestions_theme_test_suggestions_alter() executed.',
       'test_theme_theme_suggestions_alter() executed.',
       'test_theme_theme_suggestions_theme_test_suggestions_alter() executed.',
-    );
-    $content = preg_replace('/\s+/', ' ', Xss::filter($this->content, array()));
+    ];
+    $content = preg_replace('/\s+/', ' ', Xss::filter($this->content, []));
     $this->assert(strpos($content, implode(' ', $expected)) !== FALSE, 'Suggestion alter hooks executed in the expected order.');
   }
 
diff --git a/core/modules/system/src/Tests/Theme/ThemeTest.php b/core/modules/system/src/Tests/Theme/ThemeTest.php
index afced8eb358bc2b485087c6b55736271f38702c1..950e0739775c41fb32d78feec6ae460570987239 100644
--- a/core/modules/system/src/Tests/Theme/ThemeTest.php
+++ b/core/modules/system/src/Tests/Theme/ThemeTest.php
@@ -22,11 +22,11 @@ class ThemeTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test', 'node');
+  public static $modules = ['theme_test', 'node'];
 
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
   }
 
   /**
@@ -40,14 +40,14 @@ protected function setUp() {
    *   - any attributes set in the template's preprocessing function
    */
   function testAttributeMerging() {
-    $theme_test_render_element = array(
-      'elements' => array(
-        '#attributes' => array('data-foo' => 'bar'),
-      ),
-      'attributes' => array(
+    $theme_test_render_element = [
+      'elements' => [
+        '#attributes' => ['data-foo' => 'bar'],
+      ],
+      'attributes' => [
         'id' => 'bazinga',
-      ),
-    );
+      ],
+    ];
     $this->assertThemeOutput('theme_test_render_element', $theme_test_render_element, '<div id="bazinga" data-foo="bar" data-variables-are-preprocessed></div>' . "\n");
   }
 
@@ -58,10 +58,10 @@ function testThemeDataTypes() {
     // theme_test_false is an implemented theme hook so \Drupal::theme() service
     // should return a string or an object that implements MarkupInterface,
     // even though the theme function itself can return anything.
-    $foos = array('null' => NULL, 'false' => FALSE, 'integer' => 1, 'string' => 'foo', 'empty_string' => '');
+    $foos = ['null' => NULL, 'false' => FALSE, 'integer' => 1, 'string' => 'foo', 'empty_string' => ''];
     foreach ($foos as $type => $example) {
-      $output = \Drupal::theme()->render('theme_test_foo', array('foo' => $example));
-      $this->assertTrue($output instanceof MarkupInterface || is_string($output), format_string('\Drupal::theme() returns an object that implements MarkupInterface or a string for data type @type.', array('@type' => $type)));
+      $output = \Drupal::theme()->render('theme_test_foo', ['foo' => $example]);
+      $this->assertTrue($output instanceof MarkupInterface || is_string($output), format_string('\Drupal::theme() returns an object that implements MarkupInterface or a string for data type @type.', ['@type' => $type]));
       if ($output instanceof MarkupInterface) {
         $this->assertIdentical((string) $example, $output->__toString());
       }
@@ -72,7 +72,7 @@ function testThemeDataTypes() {
 
     // suggestionnotimplemented is not an implemented theme hook so \Drupal::theme() service
     // should return FALSE instead of a string.
-    $output = \Drupal::theme()->render(array('suggestionnotimplemented'), array());
+    $output = \Drupal::theme()->render(['suggestionnotimplemented'], []);
     $this->assertIdentical($output, FALSE, '\Drupal::theme() returns FALSE when a hook suggestion is not implemented.');
   }
 
@@ -83,22 +83,22 @@ function testThemeSuggestions() {
     // Set the front page as something random otherwise the CLI
     // test runner fails.
     $this->config('system.site')->set('page.front', '/nobody-home')->save();
-    $args = array('node', '1', 'edit');
+    $args = ['node', '1', 'edit'];
     $suggestions = theme_get_suggestions($args, 'page');
-    $this->assertEqual($suggestions, array('page__node', 'page__node__%', 'page__node__1', 'page__node__edit'), 'Found expected node edit page suggestions');
+    $this->assertEqual($suggestions, ['page__node', 'page__node__%', 'page__node__1', 'page__node__edit'], 'Found expected node edit page suggestions');
     // Check attack vectors.
-    $args = array('node', '\\1');
+    $args = ['node', '\\1'];
     $suggestions = theme_get_suggestions($args, 'page');
-    $this->assertEqual($suggestions, array('page__node', 'page__node__%', 'page__node__1'), 'Removed invalid \\ from suggestions');
-    $args = array('node', '1/');
+    $this->assertEqual($suggestions, ['page__node', 'page__node__%', 'page__node__1'], 'Removed invalid \\ from suggestions');
+    $args = ['node', '1/'];
     $suggestions = theme_get_suggestions($args, 'page');
-    $this->assertEqual($suggestions, array('page__node', 'page__node__%', 'page__node__1'), 'Removed invalid / from suggestions');
-    $args = array('node', "1\0");
+    $this->assertEqual($suggestions, ['page__node', 'page__node__%', 'page__node__1'], 'Removed invalid / from suggestions');
+    $args = ['node', "1\0"];
     $suggestions = theme_get_suggestions($args, 'page');
-    $this->assertEqual($suggestions, array('page__node', 'page__node__%', 'page__node__1'), 'Removed invalid \\0 from suggestions');
+    $this->assertEqual($suggestions, ['page__node', 'page__node__%', 'page__node__1'], 'Removed invalid \\0 from suggestions');
     // Define path with hyphens to be used to generate suggestions.
-    $args = array('node', '1', 'hyphen-path');
-    $result = array('page__node', 'page__node__%', 'page__node__1', 'page__node__hyphen_path');
+    $args = ['node', '1', 'hyphen-path'];
+    $result = ['page__node', 'page__node__%', 'page__node__1', 'page__node__hyphen_path'];
     $suggestions = theme_get_suggestions($args, 'page');
     $this->assertEqual($suggestions, $result, 'Found expected page suggestions for paths containing hyphens.');
   }
@@ -150,7 +150,7 @@ function testFrontPageThemeSuggestion() {
     $request->attributes->set(RouteObjectInterface::ROUTE_OBJECT, new Route('/user/login'));
     \Drupal::requestStack()->push($request);
     $this->config('system.site')->set('page.front', '/user/login')->save();
-    $suggestions = theme_get_suggestions(array('user', 'login'), 'page');
+    $suggestions = theme_get_suggestions(['user', 'login'], 'page');
     // Set it back to not annoy the batch runner.
     \Drupal::requestStack()->pop();
     $this->assertTrue(in_array('page__front', $suggestions), 'Front page template was suggested.');
@@ -207,7 +207,7 @@ function testFunctionOverride() {
    */
   function testListThemes() {
     $theme_handler = $this->container->get('theme_handler');
-    $theme_handler->install(array('test_subtheme'));
+    $theme_handler->install(['test_subtheme']);
     $themes = $theme_handler->listInfo();
 
     // Check if ThemeHandlerInterface::listInfo() retrieves enabled themes.
@@ -215,8 +215,8 @@ function testListThemes() {
 
     // Check if ThemeHandlerInterface::listInfo() returns disabled themes.
     // Check for base theme and subtheme lists.
-    $base_theme_list = array('test_basetheme' => 'Theme test base theme');
-    $sub_theme_list = array('test_subsubtheme' => 'Theme test subsubtheme', 'test_subtheme' => 'Theme test subtheme');
+    $base_theme_list = ['test_basetheme' => 'Theme test base theme'];
+    $sub_theme_list = ['test_subsubtheme' => 'Theme test subsubtheme', 'test_subtheme' => 'Theme test subtheme'];
 
     $this->assertIdentical($themes['test_basetheme']->sub_themes, $sub_theme_list, 'Base theme\'s object includes list of subthemes.');
     $this->assertIdentical($themes['test_subtheme']->base_themes, $base_theme_list, 'Subtheme\'s object includes list of base themes.');
@@ -231,20 +231,20 @@ function testListThemes() {
    * Tests child element rendering for 'render element' theme hooks.
    */
   function testDrupalRenderChildren() {
-    $element = array(
+    $element = [
       '#theme' => 'theme_test_render_element_children',
-      'child' => array(
+      'child' => [
         '#markup' => 'Foo',
-      ),
-    );
+      ],
+    ];
     $this->assertThemeOutput('theme_test_render_element_children', $element, 'Foo', 'drupal_render() avoids #theme recursion loop when rendering a render element.');
 
-    $element = array(
-      '#theme_wrappers' => array('theme_test_render_element_children'),
-      'child' => array(
+    $element = [
+      '#theme_wrappers' => ['theme_test_render_element_children'],
+      'child' => [
         '#markup' => 'Foo',
-      ),
-    );
+      ],
+    ];
     $this->assertThemeOutput('theme_test_render_element_children', $element, 'Foo', 'drupal_render() avoids #theme_wrappers recursion loop when rendering a render element.');
   }
 
@@ -281,7 +281,7 @@ function testPreprocessHtml() {
    * Tests that region attributes can be manipulated via preprocess functions.
    */
   public function testRegionClass() {
-    \Drupal::service('module_installer')->install(array('block', 'theme_region_test'));
+    \Drupal::service('module_installer')->install(['block', 'theme_region_test']);
 
     // Place a block.
     $this->drupalPlaceBlock('system_main_block');
diff --git a/core/modules/system/src/Tests/Theme/TwigDebugMarkupTest.php b/core/modules/system/src/Tests/Theme/TwigDebugMarkupTest.php
index df3c26cdaea612879df4f1147bd0e53cc49adffe..c6b6c51c58e1087f45d577f6b9a2755f709d7373 100644
--- a/core/modules/system/src/Tests/Theme/TwigDebugMarkupTest.php
+++ b/core/modules/system/src/Tests/Theme/TwigDebugMarkupTest.php
@@ -16,7 +16,7 @@ class TwigDebugMarkupTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test', 'node');
+  public static $modules = ['theme_test', 'node'];
 
   /**
    * Tests debug markup added to Twig template output.
@@ -25,9 +25,9 @@ function testTwigDebugMarkup() {
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
     $renderer = $this->container->get('renderer');
     $extension = twig_extension();
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
     $this->config('system.theme')->set('default', 'test_theme')->save();
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     // Enable debug, rebuild the service container, and clear all caches.
     $parameters = $this->container->getParameter('twig.config');
     $parameters['debug'] = TRUE;
@@ -62,7 +62,7 @@ function testTwigDebugMarkup() {
     // Create another node and make sure the template suggestions shown in the
     // debug markup are correct.
     $node3 = $this->drupalCreateNode();
-    $build = array('#theme' => 'node__foo__bar');
+    $build = ['#theme' => 'node__foo__bar'];
     $build += node_view($node3);
     $output = $renderer->renderRoot($build);
     $this->assertTrue(strpos($output, "THEME HOOK: 'node__foo__bar'") !== FALSE, 'Theme call information found.');
diff --git a/core/modules/system/src/Tests/Theme/TwigFilterTest.php b/core/modules/system/src/Tests/Theme/TwigFilterTest.php
index 810ed533105a0501d7fe66afcd384b331df4345b..653e4fa96aedae7e3f820fccc4022cf0d6fe4285 100644
--- a/core/modules/system/src/Tests/Theme/TwigFilterTest.php
+++ b/core/modules/system/src/Tests/Theme/TwigFilterTest.php
@@ -16,54 +16,54 @@ class TwigFilterTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('twig_theme_test');
+  public static $modules = ['twig_theme_test'];
 
   /**
    * Test Twig "without" filter.
    */
   public function testTwigWithoutFilter() {
-    $filter_test = array(
+    $filter_test = [
       '#theme' => 'twig_theme_test_filter',
-      '#quote' => array(
-        'content' => array('#markup' => 'You can only find truth with logic if you have already found truth without it.'),
-        'author' => array('#markup' => 'Gilbert Keith Chesterton'),
-        'date' => array('#markup' => '1874-1936'),
-      ),
-      '#attributes' => array(
+      '#quote' => [
+        'content' => ['#markup' => 'You can only find truth with logic if you have already found truth without it.'],
+        'author' => ['#markup' => 'Gilbert Keith Chesterton'],
+        'date' => ['#markup' => '1874-1936'],
+      ],
+      '#attributes' => [
         'id' => 'quotes',
         'checked' => TRUE,
-        'class' => array('red', 'green', 'blue'),
-      ),
-    );
+        'class' => ['red', 'green', 'blue'],
+      ],
+    ];
     $rendered = \Drupal::service('renderer')->renderRoot($filter_test);
     $this->setRawContent($rendered);
 
-    $elements = array(
-      array(
+    $elements = [
+      [
         'expected' => '<div><strong>No author:</strong> You can only find truth with logic if you have already found truth without it.1874-1936.</div>',
         'message' => '"No author" was successfully rendered.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><strong>Complete quote after without:</strong> You can only find truth with logic if you have already found truth without it.Gilbert Keith Chesterton1874-1936.</div>',
         'message' => '"Complete quote after without" was successfully rendered.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><strong>Only author:</strong> Gilbert Keith Chesterton.</div>',
         'message' => '"Only author:" was successfully rendered.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><strong>No author or date:</strong> You can only find truth with logic if you have already found truth without it..</div>',
         'message' => '"No author or date" was successfully rendered.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><strong>Only date:</strong> 1874-1936.</div>',
         'message' => '"Only date" was successfully rendered.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><strong>Complete quote again for good measure:</strong> You can only find truth with logic if you have already found truth without it.Gilbert Keith Chesterton1874-1936.</div>',
         'message' => '"Complete quote again for good measure" was successfully rendered.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><strong>Marked-up:</strong>
   <blockquote>
     <p>You can only find truth with logic if you have already found truth without it.</p>
@@ -72,48 +72,48 @@ public function testTwigWithoutFilter() {
     </footer>
   </blockquote>',
         'message' => '"Marked-up quote" was successfully rendered.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><span id="quotes" checked class="red green blue">All attributes:</span></div>',
         'message' => 'All attributes printed.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><span class="red green blue" id="quotes" checked>Class attributes in front, remainder at the back:</span></div>',
         'message' => 'Class attributes printed in the front, the rest in the back.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><span id="quotes" checked data-class="red green blue">Class attributes in back, remainder at the front:</span></div>',
         'message' => 'Class attributes printed in the back, the rest in the front.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><span class="red green blue">Class attributes only:</span></div>',
         'message' => 'Class attributes only printed.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><span checked id="quotes" class="red green blue">Without boolean attribute.</span></div>',
         'message' => 'Boolean attribute printed in the front.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><span data-id="quotes" checked class="red green blue">Without string attribute.</span></div>',
         'message' => 'Without string attribute in the front.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><span checked>Without id and class attributes.</span></div>',
         'message' => 'Attributes printed without id and class attributes.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><span id="quotes" checked class="red green blue">All attributes again.</span></div>',
         'message' => 'All attributes printed again.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div id="quotes-here"><span class="gray-like-a-bunny bem__ized--top-feature" id="quotes-here">ID and class. Having the same ID twice is not valid markup but we want to make sure the filter doesn\'t use \Drupal\Component\Utility\Html::getUniqueId().</span></div>',
         'message' => 'Class and ID filtered.',
-      ),
-      array(
+      ],
+      [
         'expected' => '<div><strong>Rendered author string length:</strong> 24.</div>',
         'message' => 'Render filter string\'s length.',
-      ),
-    );
+      ],
+    ];
 
     foreach ($elements as $element) {
       $this->assertRaw($element['expected'], $element['message']);
diff --git a/core/modules/system/src/Tests/Theme/TwigNamespaceTest.php b/core/modules/system/src/Tests/Theme/TwigNamespaceTest.php
index 27a54d17994cad78bd719aca71483d11ad2c1b7f..ab62889b9a95c126a4dfaa3d9dd86f871b9c59f7 100644
--- a/core/modules/system/src/Tests/Theme/TwigNamespaceTest.php
+++ b/core/modules/system/src/Tests/Theme/TwigNamespaceTest.php
@@ -16,7 +16,7 @@ class TwigNamespaceTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('twig_theme_test', 'twig_namespace_a', 'twig_namespace_b', 'node');
+  public static $modules = ['twig_theme_test', 'twig_namespace_a', 'twig_namespace_b', 'node'];
 
   /**
    * @var \Drupal\Core\Template\TwigEnvironment
@@ -25,7 +25,7 @@ class TwigNamespaceTest extends WebTestBase {
 
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('test_theme', 'bartik'));
+    \Drupal::service('theme_handler')->install(['test_theme', 'bartik']);
     $this->twig = \Drupal::service('twig');
   }
 
@@ -52,7 +52,7 @@ public function testTemplateDiscovery() {
    */
   public function testTwigNamespaces() {
     // Test twig @extends and @include in template files.
-    $test = array('#theme' => 'twig_namespace_test');
+    $test = ['#theme' => 'twig_namespace_test'];
     $this->setRawContent(\Drupal::service('renderer')->renderRoot($test));
 
     $this->assertText('This line is from twig_namespace_a/templates/test.html.twig');
diff --git a/core/modules/system/src/Tests/Theme/TwigRawTest.php b/core/modules/system/src/Tests/Theme/TwigRawTest.php
index 80afb8eaf886ecc7fbd7328b6ff82c4570488fcd..8be63dbb5183c12e576f0a7bdc44829a3f349fcc 100644
--- a/core/modules/system/src/Tests/Theme/TwigRawTest.php
+++ b/core/modules/system/src/Tests/Theme/TwigRawTest.php
@@ -16,16 +16,16 @@ class TwigRawTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('twig_theme_test');
+  public static $modules = ['twig_theme_test'];
 
   /**
    * Tests the raw filter inside an autoescape tag.
    */
   public function testAutoescapeRaw() {
-    $test = array(
+    $test = [
       '#theme' => 'twig_raw_test',
       '#script' => '<script>alert("This alert is real because I will put it through the raw filter!");</script>',
-    );
+    ];
     $rendered = \Drupal::service('renderer')->renderRoot($test);
     $this->setRawContent($rendered);
     $this->assertRaw('<script>alert("This alert is real because I will put it through the raw filter!");</script>');
diff --git a/core/modules/system/src/Tests/Theme/TwigTransTest.php b/core/modules/system/src/Tests/Theme/TwigTransTest.php
index ef6fe05074f0dae23ca62f71e70649191ccae2cd..b73cdaf0c24e5f8669bec020b699d0714c86b2e3 100644
--- a/core/modules/system/src/Tests/Theme/TwigTransTest.php
+++ b/core/modules/system/src/Tests/Theme/TwigTransTest.php
@@ -17,12 +17,12 @@ class TwigTransTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'theme_test',
     'twig_theme_test',
     'locale',
     'language'
-  );
+  ];
 
   /**
    * An administrative user for testing.
@@ -36,10 +36,10 @@ class TwigTransTest extends WebTestBase {
    *
    * @var array
    */
-  protected $languages = array(
+  protected $languages = [
     'xx' => 'Lolspeak',
     'zz' => 'Lolspeak2',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -48,16 +48,16 @@ protected function setUp() {
     parent::setUp();
 
     // Setup test_theme.
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
     $this->config('system.theme')->set('default', 'test_theme')->save();
 
     // Create and log in as admin.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer languages',
       'access administration pages',
       'administer site configuration',
       'translate interface'
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
 
     // Install languages.
@@ -77,7 +77,7 @@ protected function setUp() {
   public function testTwigTransTags() {
     // Run this once without and once with Twig debug because trans can work
     // differently depending on that setting.
-    $this->drupalGet('twig-theme-test/trans', array('language' => \Drupal::languageManager()->getLanguage('xx')));
+    $this->drupalGet('twig-theme-test/trans', ['language' => \Drupal::languageManager()->getLanguage('xx')]);
     $this->assertTwigTransTags();
 
     // Enable debug, rebuild the service container, and clear all caches.
@@ -87,7 +87,7 @@ public function testTwigTransTags() {
     $this->rebuildContainer();
     $this->resetAll();
 
-    $this->drupalGet('twig-theme-test/trans', array('language' => \Drupal::languageManager()->getLanguage('xx')));
+    $this->drupalGet('twig-theme-test/trans', ['language' => \Drupal::languageManager()->getLanguage('xx')]);
     $this->assertTwigTransTags();
   }
 
@@ -197,12 +197,12 @@ protected function installLanguages() {
       $contents = $this->poFileContents($langcode);
       if ($contents) {
         // Add test language for translation testing.
-        $edit = array(
+        $edit = [
           'predefined_langcode' => 'custom',
           'langcode' => $langcode,
           'label' => $name,
           'direction' => LanguageInterface::DIRECTION_LTR,
-        );
+        ];
 
         // Install the language in Drupal.
         $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
@@ -211,11 +211,11 @@ protected function installLanguages() {
         // Import the custom .po contents for the language.
         $filename = \Drupal::service('file_system')->tempnam('temporary://', "po_") . '.po';
         file_put_contents($filename, $contents);
-        $options = array(
+        $options = [
           'files[file]' => $filename,
           'langcode' => $langcode,
           'customized' => TRUE,
-        );
+        ];
         $this->drupalPostForm('admin/config/regional/translate/import', $options, t('Import'));
         drupal_unlink($filename);
       }
diff --git a/core/modules/system/src/Tests/Update/DependencyHookInvocationTest.php b/core/modules/system/src/Tests/Update/DependencyHookInvocationTest.php
index a9723c235dc3feb0974f4170fccf2ec92efdd73f..9e5cc123b82ebdc1075173882af13f1f0b215d65 100644
--- a/core/modules/system/src/Tests/Update/DependencyHookInvocationTest.php
+++ b/core/modules/system/src/Tests/Update/DependencyHookInvocationTest.php
@@ -17,7 +17,7 @@ class DependencyHookInvocationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('update_test_0', 'update_test_1', 'update_test_2');
+  public static $modules = ['update_test_0', 'update_test_1', 'update_test_2'];
 
   protected function setUp() {
     parent::setUp();
diff --git a/core/modules/system/src/Tests/Update/DependencyMissingTest.php b/core/modules/system/src/Tests/Update/DependencyMissingTest.php
index 9764b4c81267318ae33f9223bbc38234649f8679..fe208dc133c8e51feeaf98ab27bb2d9d0455ad48 100644
--- a/core/modules/system/src/Tests/Update/DependencyMissingTest.php
+++ b/core/modules/system/src/Tests/Update/DependencyMissingTest.php
@@ -16,7 +16,7 @@ class DependencyMissingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('update_test_0', 'update_test_2');
+  public static $modules = ['update_test_0', 'update_test_2'];
 
   protected function setUp() {
     // Only install update_test_2.module, even though its updates have a
@@ -26,9 +26,9 @@ protected function setUp() {
   }
 
   function testMissingUpdate() {
-    $starting_updates = array(
+    $starting_updates = [
       'update_test_2' => 8001,
-    );
+    ];
     $update_graph = update_resolve_dependencies($starting_updates);
     $this->assertTrue($update_graph['update_test_2_update_8001']['allowed'], "The module's first update function is allowed to run, since it does not have any missing dependencies.");
     $this->assertFalse($update_graph['update_test_2_update_8002']['allowed'], "The module's second update function is not allowed to run, since it has a direct dependency on a missing update.");
diff --git a/core/modules/system/src/Tests/Update/DependencyOrderingTest.php b/core/modules/system/src/Tests/Update/DependencyOrderingTest.php
index bb3ae3717c4df5039492130de2a4d409fe9dd10b..f5c344fc0934d3a81d67ae2961de63744d5360ae 100644
--- a/core/modules/system/src/Tests/Update/DependencyOrderingTest.php
+++ b/core/modules/system/src/Tests/Update/DependencyOrderingTest.php
@@ -16,7 +16,7 @@ class DependencyOrderingTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('update_test_0', 'update_test_1', 'update_test_2', 'update_test_3');
+  public static $modules = ['update_test_0', 'update_test_1', 'update_test_2', 'update_test_3'];
 
   protected function setUp() {
     parent::setUp();
@@ -27,14 +27,14 @@ protected function setUp() {
    * Test that updates within a single module run in the correct order.
    */
   function testUpdateOrderingSingleModule() {
-    $starting_updates = array(
+    $starting_updates = [
       'update_test_1' => 8001,
-    );
-    $expected_updates = array(
+    ];
+    $expected_updates = [
       'update_test_1_update_8001',
       'update_test_1_update_8002',
       'update_test_1_update_8003',
-    );
+    ];
     $actual_updates = array_keys(update_resolve_dependencies($starting_updates));
     $this->assertEqual($expected_updates, $actual_updates, 'Updates within a single module run in the correct order.');
   }
@@ -43,10 +43,10 @@ function testUpdateOrderingSingleModule() {
    * Test that dependencies between modules are resolved correctly.
    */
   function testUpdateOrderingModuleInterdependency() {
-    $starting_updates = array(
+    $starting_updates = [
       'update_test_2' => 8001,
       'update_test_3' => 8001,
-    );
+    ];
     $update_order = array_keys(update_resolve_dependencies($starting_updates));
     // Make sure that each dependency is satisfied.
     $first_dependency_satisfied = array_search('update_test_2_update_8001', $update_order) < array_search('update_test_3_update_8001', $update_order);
diff --git a/core/modules/system/src/Tests/Update/InvalidUpdateHookTest.php b/core/modules/system/src/Tests/Update/InvalidUpdateHookTest.php
index ce5a0066f5e5f2d0106db7a9f85c00973d4a215a..60ac0c47c1c1c1b9e237a841bd5be32e6f65dc83 100644
--- a/core/modules/system/src/Tests/Update/InvalidUpdateHookTest.php
+++ b/core/modules/system/src/Tests/Update/InvalidUpdateHookTest.php
@@ -17,7 +17,7 @@ class InvalidUpdateHookTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('update_test_invalid_hook', 'update_script_test', 'dblog');
+  public static $modules = ['update_test_invalid_hook', 'update_script_test', 'dblog'];
 
   /**
    * URL for the upgrade script.
@@ -38,7 +38,7 @@ protected function setUp() {
     require_once \Drupal::root() . '/core/includes/update.inc';
 
     $this->updateUrl = $GLOBALS['base_url'] . '/update.php';
-    $this->updateUser = $this->drupalCreateUser(array('administer software updates'));
+    $this->updateUser = $this->drupalCreateUser(['administer software updates']);
   }
 
   function testInvalidUpdateHook() {
diff --git a/core/modules/system/src/Tests/Update/UpdatePathRC1TestBaseFilledTest.php b/core/modules/system/src/Tests/Update/UpdatePathRC1TestBaseFilledTest.php
index eb95fce6ed81ca9f8b0540fa726d5c95232649b6..09cc586bc7eb8c77d66cfc745c11d7f694c5e932 100644
--- a/core/modules/system/src/Tests/Update/UpdatePathRC1TestBaseFilledTest.php
+++ b/core/modules/system/src/Tests/Update/UpdatePathRC1TestBaseFilledTest.php
@@ -29,13 +29,13 @@ public function testUpdatedSite() {
 
     $spanish = \Drupal::languageManager()->getLanguage('es');
 
-    $expected_node_data = array(
+    $expected_node_data = [
       [1, 'article', 'en', 'Test Article - New title'],
       [2, 'book', 'en', 'Book page'],
       [3, 'forum', 'en', 'Forum topic'],
       [4, 'page', 'en', 'Test page'],
       [8, 'test_content_type', 'en', 'Test title'],
-    );
+    ];
     foreach ($expected_node_data as $node_data) {
       $id = $node_data[0];
       $type = $node_data[1];
diff --git a/core/modules/system/src/Tests/Update/UpdatePathTestBaseFilledTest.php b/core/modules/system/src/Tests/Update/UpdatePathTestBaseFilledTest.php
index 6edbfe3ae970bdb94f3aec78977c3dc45b2dce6a..fe62340af8e0ce80fed9f663e7f4021405578fe0 100644
--- a/core/modules/system/src/Tests/Update/UpdatePathTestBaseFilledTest.php
+++ b/core/modules/system/src/Tests/Update/UpdatePathTestBaseFilledTest.php
@@ -29,13 +29,13 @@ public function testUpdatedSite() {
 
     $spanish = \Drupal::languageManager()->getLanguage('es');
 
-    $expected_node_data = array(
+    $expected_node_data = [
       [1, 'article', 'en', 'Test Article - New title'],
       [2, 'book', 'en', 'Book page'],
       [3, 'forum', 'en', 'Forum topic'],
       [4, 'page', 'en', 'Test page'],
       [8, 'test_content_type', 'en', 'Test title'],
-    );
+    ];
     foreach ($expected_node_data as $node_data) {
       $id = $node_data[0];
       $type = $node_data[1];
diff --git a/core/modules/system/src/Tests/Update/UpdateScriptTest.php b/core/modules/system/src/Tests/Update/UpdateScriptTest.php
index b80ef82e3bc994fc9a2c0b7f2a7e56cdbb4e141b..12574ee4d4d86d320fd8c765ffde61cca825352e 100644
--- a/core/modules/system/src/Tests/Update/UpdateScriptTest.php
+++ b/core/modules/system/src/Tests/Update/UpdateScriptTest.php
@@ -18,7 +18,7 @@ class UpdateScriptTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('update_script_test', 'dblog', 'language');
+  public static $modules = ['update_script_test', 'dblog', 'language'];
 
   /**
    * {@inheritdoc}
@@ -42,7 +42,7 @@ class UpdateScriptTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
     $this->updateUrl = Url::fromRoute('system.db_update');
-    $this->updateUser = $this->drupalCreateUser(array('administer software updates', 'access site in maintenance mode'));
+    $this->updateUser = $this->drupalCreateUser(['administer software updates', 'access site in maintenance mode']);
     \Drupal::service('entity.definition_update_manager')->applyUpdates();
   }
 
@@ -53,7 +53,7 @@ function testUpdateAccess() {
     // Try accessing update.php without the proper permission.
     $regular_user = $this->drupalCreateUser();
     $this->drupalLogin($regular_user);
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->assertResponse(403);
 
     // Check that a link to the update page is not accessible to regular users.
@@ -62,7 +62,7 @@ function testUpdateAccess() {
 
     // Try accessing update.php as an anonymous user.
     $this->drupalLogout();
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->assertResponse(403);
 
     // Check that a link to the update page is not accessible to anonymous
@@ -72,7 +72,7 @@ function testUpdateAccess() {
 
     // Access the update page with the proper permission.
     $this->drupalLogin($this->updateUser);
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->assertResponse(200);
 
     // Check that a link to the update page is accessible to users with proper
@@ -82,7 +82,7 @@ function testUpdateAccess() {
 
     // Access the update page as user 1.
     $this->drupalLogin($this->rootUser);
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->assertResponse(200);
 
     // Check that a link to the update page is accessible to user 1.
@@ -99,7 +99,7 @@ function testRequirements() {
 
     // If there are no requirements warnings or errors, we expect to be able to
     // go through the update process uninterrupted.
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->clickLink(t('Continue'));
     $this->assertText(t('No pending updates.'), 'End of update process was reached.');
     // Confirm that all caches were cleared.
@@ -113,7 +113,7 @@ function testRequirements() {
     // successfully.
     $update_script_test_config->set('requirement_type', REQUIREMENT_WARNING)->save();
     drupal_set_installed_schema_version('update_script_test', drupal_get_installed_schema_version('update_script_test') - 1);
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->assertText('This is a requirements warning provided by the update_script_test module.');
     $this->clickLink('try again');
     $this->assertNoText('This is a requirements warning provided by the update_script_test module.');
@@ -124,7 +124,7 @@ function testRequirements() {
     $this->assertText(t('hook_cache_flush() invoked for update_script_test.module.'), 'Caches were cleared after resolving a requirements warning and applying updates.');
 
     // Now try again without pending updates to make sure that works too.
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->assertText('This is a requirements warning provided by the update_script_test module.');
     $this->clickLink('try again');
     $this->assertNoText('This is a requirements warning provided by the update_script_test module.');
@@ -137,7 +137,7 @@ function testRequirements() {
     // clicking the link to proceed (since the problem that triggered the error
     // has not been fixed).
     $update_script_test_config->set('requirement_type', REQUIREMENT_ERROR)->save();
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->assertText('This is a requirements error provided by the update_script_test module.');
     $this->clickLink('try again');
     $this->assertText('This is a requirements error provided by the update_script_test module.');
@@ -163,7 +163,7 @@ function testThemeSystem() {
   function testNoUpdateFunctionality() {
     // Click through update.php with 'administer software updates' permission.
     $this->drupalLogin($this->updateUser);
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->clickLink(t('Continue'));
     $this->assertText(t('No pending updates.'));
     $this->assertNoLink('Administration pages');
@@ -172,9 +172,9 @@ function testNoUpdateFunctionality() {
     $this->assertResponse(200);
 
     // Click through update.php with 'access administration pages' permission.
-    $admin_user = $this->drupalCreateUser(array('administer software updates', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer software updates', 'access administration pages']);
     $this->drupalLogin($admin_user);
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->clickLink(t('Continue'));
     $this->assertText(t('No pending updates.'));
     $this->assertLink('Administration pages');
@@ -204,9 +204,9 @@ function testSuccessfulUpdateFunctionality() {
 
     // Click through update.php with 'access administration pages' and
     // 'access site reports' permissions.
-    $admin_user = $this->drupalCreateUser(array('administer software updates', 'access administration pages', 'access site reports', 'access site in maintenance mode'));
+    $admin_user = $this->drupalCreateUser(['administer software updates', 'access administration pages', 'access site reports', 'access site in maintenance mode']);
     $this->drupalLogin($admin_user);
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->clickLink(t('Continue'));
     $this->clickLink(t('Apply pending updates'));
     $this->assertText('Updates were attempted.');
@@ -237,11 +237,11 @@ function testMaintenanceModeUpdateFunctionality() {
    */
   function testSuccessfulMultilingualUpdateFunctionality() {
     // Add some custom languages.
-    foreach (array('aa', 'bb') as $language_code) {
-      ConfigurableLanguage::create(array(
+    foreach (['aa', 'bb'] as $language_code) {
+      ConfigurableLanguage::create([
           'id' => $language_code,
           'label' => $this->randomMachineName(),
-        ))->save();
+        ])->save();
     }
 
     $config = \Drupal::service('config.factory')->getEditable('language.negotiation');
@@ -261,18 +261,18 @@ function testSuccessfulMultilingualUpdateFunctionality() {
     $this->assertEqual($schema_version, 8000, 'update_script_test schema version overridden to 8000.');
 
     // Create admin user.
-    $admin_user = $this->drupalCreateUser(array('administer software updates', 'access administration pages', 'access site reports', 'access site in maintenance mode', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer software updates', 'access administration pages', 'access site reports', 'access site in maintenance mode', 'administer site configuration']);
     $this->drupalLogin($admin_user);
 
     // Visit status report page and ensure, that link to update.php has no path prefix set.
-    $this->drupalGet('en/admin/reports/status', array('external' => TRUE));
+    $this->drupalGet('en/admin/reports/status', ['external' => TRUE]);
     $this->assertResponse(200);
     $this->assertLinkByHref('/update.php');
     $this->assertNoLinkByHref('en/update.php');
 
     // Click through update.php with 'access administration pages' and
     // 'access site reports' permissions.
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->clickLink(t('Continue'));
     $this->clickLink(t('Apply pending updates'));
     $this->assertText('Updates were attempted.');
@@ -303,7 +303,7 @@ protected function updateScriptTest($maintenance_mode) {
     else {
       $this->assertNoText('Operating in maintenance mode.');
     }
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->clickLink(t('Continue'));
     $this->clickLink(t('Apply pending updates'));
 
@@ -330,74 +330,74 @@ protected function updateScriptTest($maintenance_mode) {
    * Returns the Drupal 7 system table schema.
    */
   public function getSystemSchema() {
-    return array(
+    return [
       'description' => "A list of all modules, themes, and theme engines that are or have been installed in Drupal's file system.",
-      'fields' => array(
-        'filename' => array(
+      'fields' => [
+        'filename' => [
           'description' => 'The path of the primary file for this item, relative to the Drupal root; e.g. modules/node/node.module.',
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'name' => array(
+        ],
+        'name' => [
           'description' => 'The name of the item; e.g. node.',
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'type' => array(
+        ],
+        'type' => [
           'description' => 'The type of the item, either module, theme, or theme_engine.',
           'type' => 'varchar',
           'length' => 12,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'owner' => array(
+        ],
+        'owner' => [
           'description' => "A theme's 'parent' . Can be either a theme or an engine.",
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'status' => array(
+        ],
+        'status' => [
           'description' => 'Boolean indicating whether or not this item is enabled.',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'bootstrap' => array(
+        ],
+        'bootstrap' => [
           'description' => "Boolean indicating whether this module is loaded during Drupal's early bootstrapping phase (e.g. even before the page cache is consulted).",
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'schema_version' => array(
+        ],
+        'schema_version' => [
           'description' => "The module's database schema version number. -1 if the module is not installed (its tables do not exist); \Drupal::CORE_MINIMUM_SCHEMA_VERSION or the largest N of the module's hook_update_N() function that has either been run or existed when the module was first installed.",
           'type' => 'int',
           'not null' => TRUE,
           'default' => -1,
           'size' => 'small',
-        ),
-        'weight' => array(
+        ],
+        'weight' => [
           'description' => "The order in which this module's hooks should be invoked relative to other modules. Equal-weighted modules are ordered by name.",
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'info' => array(
+        ],
+        'info' => [
           'description' => "A serialized array containing information from the module's .info file; keys can include name, description, package, version, core, dependencies, and php.",
           'type' => 'blob',
           'not null' => FALSE,
-        ),
-      ),
-      'primary key' => array('filename'),
-      'indexes' => array(
-        'system_list' => array('status', 'bootstrap', 'type', 'weight', 'name'),
-        'type_name' => array('type', 'name'),
-      ),
-    );
+        ],
+      ],
+      'primary key' => ['filename'],
+      'indexes' => [
+        'system_list' => ['status', 'bootstrap', 'type', 'weight', 'name'],
+        'type_name' => ['type', 'name'],
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/system/src/Tests/Update/UpdatesWith7xTest.php b/core/modules/system/src/Tests/Update/UpdatesWith7xTest.php
index 9782d91c63c198d276bb4310190449fce8ec0914..3694cad78a7012ec40ef742e44ac9737c9158106 100644
--- a/core/modules/system/src/Tests/Update/UpdatesWith7xTest.php
+++ b/core/modules/system/src/Tests/Update/UpdatesWith7xTest.php
@@ -17,7 +17,7 @@ class UpdatesWith7xTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('update_test_with_7x');
+  public static $modules = ['update_test_with_7x'];
 
   /**
    * The URL for the update page.
@@ -33,7 +33,7 @@ protected function setUp() {
     parent::setUp();
     require_once \Drupal::root() . '/core/includes/update.inc';
     $this->updateUrl = $GLOBALS['base_url'] . '/update.php';
-    $this->updateUser = $this->drupalCreateUser(array('administer software updates'));
+    $this->updateUser = $this->drupalCreateUser(['administer software updates']);
   }
 
   function testWith7x() {
@@ -47,7 +47,7 @@ function testWith7x() {
 
     // Click through update.php with 'administer software updates' permission.
     $this->drupalLogin($this->updateUser);
-    $this->drupalGet($this->updateUrl, array('external' => TRUE));
+    $this->drupalGet($this->updateUrl, ['external' => TRUE]);
     $this->clickLink(t('Continue'));
     $this->assertText(t('Some of the pending updates cannot be applied because their dependencies were not met.'));
   }
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index 94f630295adbff40c8928dec5ff40a1665cef70a..799869bbc3729acca42d8ce6cba73124600ac075 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -49,10 +49,10 @@ function template_preprocess_admin_block_content(&$variables) {
  *     'right'.
  */
 function template_preprocess_admin_page(&$variables) {
-  $variables['system_compact_link'] = array(
+  $variables['system_compact_link'] = [
     '#type' => 'system_compact_link',
-  );
-  $variables['containers'] = array();
+  ];
+  $variables['containers'] = [];
   $stripe = 0;
   foreach ($variables['blocks'] as $block) {
     if (!empty($block['content']['#content'])) {
@@ -60,10 +60,10 @@ function template_preprocess_admin_page(&$variables) {
         // Perform automatic striping.
         $block['position'] = ++$stripe % 2 ? 'left' : 'right';
       }
-      $variables['containers'][$block['position']]['blocks'][] = array(
+      $variables['containers'][$block['position']]['blocks'][] = [
         '#theme' => 'admin_block',
         '#block' => $block,
-      );
+      ];
     }
   }
 }
@@ -78,10 +78,10 @@ function template_preprocess_admin_page(&$variables) {
  *   - menu_items: An array of modules to be displayed.
  */
 function template_preprocess_system_admin_index(&$variables) {
-  $variables['system_compact_link'] = array(
+  $variables['system_compact_link'] = [
     '#type' => 'system_compact_link',
-  );
-  $variables['containers'] = array();
+  ];
+  $variables['containers'] = [];
   $stripe = 0;
   // Iterate over all modules.
   foreach ($variables['menu_items'] as $module => $block) {
@@ -89,18 +89,18 @@ function template_preprocess_system_admin_index(&$variables) {
     $position = ++$stripe % 2 ? 'left' : 'right';
     // Output links.
     if (count($items)) {
-      $variables['containers'][$position][] = array(
+      $variables['containers'][$position][] = [
         '#theme' => 'admin_block',
-        '#block' => array(
+        '#block' => [
           'position' => $position,
           'title' => $module,
-          'content' => array(
+          'content' => [
             '#theme' => 'admin_block_content',
             '#content' => $items,
-          ),
+          ],
           'description' => t($description),
-        ),
-      );
+        ],
+      ];
     }
   }
 }
@@ -241,7 +241,7 @@ function template_preprocess_system_modules_uninstall(&$variables) {
  *   - theme_group_titles: An associative array containing titles of themes.
  */
 function template_preprocess_system_themes_page(&$variables) {
-  $groups = array();
+  $groups = [];
   $theme_groups = $variables['theme_groups'];
   $variables['attributes']['id'] = 'system-themes-page';
 
@@ -251,33 +251,33 @@ function template_preprocess_system_themes_page(&$variables) {
       continue;
     }
     // Start new theme group.
-    $theme_group = array();
+    $theme_group = [];
     $theme_group['state'] = $state;
     $theme_group['title'] = $title;
-    $theme_group['themes'] = array();
+    $theme_group['themes'] = [];
     $theme_group['attributes'] = new Attribute();
 
     foreach ($theme_groups[$state] as $theme) {
-      $current_theme = array();
+      $current_theme = [];
 
       // Screenshot depicting the theme.
       if ($theme->screenshot) {
-        $current_theme['screenshot'] = array(
+        $current_theme['screenshot'] = [
           '#theme' => 'image',
           '#uri' => $theme->screenshot['uri'],
           '#alt' => $theme->screenshot['alt'],
           '#title' => $theme->screenshot['title'],
           '#attributes' => $theme->screenshot['attributes'],
-        );
+        ];
       }
       else {
-        $current_theme['screenshot'] = array(
+        $current_theme['screenshot'] = [
           '#theme' => 'image',
           '#uri' => drupal_get_path('module', 'system') . '/images/no_screenshot.png',
           '#alt' => t('No screenshot'),
           '#title' => t('No screenshot'),
-          '#attributes' => new Attribute(array('class' => array('no-screenshot'))),
-        );
+          '#attributes' => new Attribute(['class' => ['no-screenshot']]),
+        ];
       }
 
       // Localize the theme description.
@@ -302,23 +302,23 @@ function template_preprocess_system_themes_page(&$variables) {
         if (substr_count($theme->info['php'], '.') < 2) {
           $theme->info['php'] .= '.*';
         }
-        $current_theme['incompatible'] = t('This theme requires PHP version @php_required and is incompatible with PHP version @php_version.', array('@php_required' => $theme->info['php'], '@php_version' => phpversion()));
+        $current_theme['incompatible'] = t('This theme requires PHP version @php_required and is incompatible with PHP version @php_version.', ['@php_required' => $theme->info['php'], '@php_version' => phpversion()]);
       }
       elseif (!empty($theme->incompatible_base)) {
-        $current_theme['incompatible'] = t('This theme requires the base theme @base_theme to operate correctly.', array('@base_theme' => $theme->info['base theme']));
+        $current_theme['incompatible'] = t('This theme requires the base theme @base_theme to operate correctly.', ['@base_theme' => $theme->info['base theme']]);
       }
       elseif (!empty($theme->incompatible_engine)) {
-        $current_theme['incompatible'] = t('This theme requires the theme engine @theme_engine to operate correctly.', array('@theme_engine' => $theme->info['engine']));
+        $current_theme['incompatible'] = t('This theme requires the theme engine @theme_engine to operate correctly.', ['@theme_engine' => $theme->info['engine']]);
       }
 
       // Build operation links.
-      $current_theme['operations'] = array(
+      $current_theme['operations'] = [
         '#theme' => 'links',
         '#links' => $theme->operations,
-        '#attributes' => array(
-          'class' => array('operations', 'clearfix'),
-        ),
-      );
+        '#attributes' => [
+          'class' => ['operations', 'clearfix'],
+        ],
+      ];
       $theme_group['themes'][] = $current_theme;
     }
     $groups[] = $theme_group;
diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index 8534ebf7080606a7d61bf366bace51c9359b257e..7951ecd21f8cfd2a928e42368774d3ecdc49a262 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -24,11 +24,11 @@ function hook_system_themes_page_alter(&$theme_groups) {
   foreach ($theme_groups as $state => &$group) {
     foreach ($theme_groups[$state] as &$theme) {
       // Add a foo link to each list of theme operations.
-      $theme->operations[] = array(
+      $theme->operations[] = [
         'title' => t('Foo'),
         'url' => Url::fromRoute('system.themes_page'),
-        'query' => array('theme' => $theme->getName())
-      );
+        'query' => ['theme' => $theme->getName()]
+      ];
     }
   }
 }
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index c4067ef3bbc9fd07be3195f81a4787bbecca4ac3..fadf17fdc60eaab1ffe71848bf2b49edf692dade 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -27,36 +27,36 @@
  */
 function system_requirements($phase) {
   global $install_state;
-  $requirements = array();
+  $requirements = [];
 
   // Report Drupal version
   if ($phase == 'runtime') {
-    $requirements['drupal'] = array(
+    $requirements['drupal'] = [
       'title' => t('Drupal'),
       'value' => \Drupal::VERSION,
       'severity' => REQUIREMENT_INFO,
       'weight' => -10,
-    );
+    ];
 
     // Display the currently active installation profile, if the site
     // is not running the default installation profile.
     $profile = drupal_get_profile();
     if ($profile != 'standard') {
       $info = system_get_info('module', $profile);
-      $requirements['install_profile'] = array(
+      $requirements['install_profile'] = [
         'title' => t('Installation profile'),
-        'value' => t('%profile_name (%profile-%version)', array(
+        'value' => t('%profile_name (%profile-%version)', [
           '%profile_name' => $info['name'],
           '%profile' => $profile,
           '%version' => $info['version']
-        )),
+        ]),
         'severity' => REQUIREMENT_INFO,
         'weight' => -9
-      );
+      ];
     }
 
     // Warn if any experimental modules are installed.
-    $experimental = array();
+    $experimental = [];
     $enabled_modules = \Drupal::moduleHandler()->getModuleList();
     foreach ($enabled_modules as $module => $data) {
       $info = system_get_info('module', $module);
@@ -65,20 +65,20 @@ function system_requirements($phase) {
       }
     }
     if (!empty($experimental)) {
-      $requirements['experimental'] = array(
+      $requirements['experimental'] = [
         'title' => t('Experimental modules enabled'),
-        'value' => t('Experimental modules found: %module_list. <a href=":url">Experimental modules</a> are provided for testing purposes only. Use at your own risk.', array('%module_list' => implode(', ', $experimental), ':url' => 'https://www.drupal.org/core/experimental')),
+        'value' => t('Experimental modules found: %module_list. <a href=":url">Experimental modules</a> are provided for testing purposes only. Use at your own risk.', ['%module_list' => implode(', ', $experimental), ':url' => 'https://www.drupal.org/core/experimental']),
         'severity' => REQUIREMENT_WARNING,
-      );
+      ];
     }
   }
 
   // Web server information.
   $software = \Drupal::request()->server->get('SERVER_SOFTWARE');
-  $requirements['webserver'] = array(
+  $requirements['webserver'] = [
     'title' => t('Web server'),
     'value' => $software,
-  );
+  ];
 
   // Tests clean URL support.
   if ($phase == 'install' && $install_state['interactive'] && !isset($_GET['rewrite']) && strpos($software, 'Apache') !== FALSE) {
@@ -127,30 +127,30 @@ function system_requirements($phase) {
     }
 
     if ($rewrite_warning) {
-      $requirements['apache_version'] = array (
+      $requirements['apache_version'] =  [
         'title' => t('Apache version'),
         'value' => $apache_version_string,
         'severity' => REQUIREMENT_WARNING,
-        'description' => t('Due to the settings for ServerTokens in httpd.conf, it is impossible to accurately determine the version of Apache running on this server. The reported value is @reported, to run Drupal without mod_rewrite, a minimum version of 2.2.16 is needed.', array('@reported' => $apache_version_string)),
-      );
+        'description' => t('Due to the settings for ServerTokens in httpd.conf, it is impossible to accurately determine the version of Apache running on this server. The reported value is @reported, to run Drupal without mod_rewrite, a minimum version of 2.2.16 is needed.', ['@reported' => $apache_version_string]),
+      ];
     }
 
     if ($rewrite_error) {
-      $requirements['Apache version'] = array (
+      $requirements['Apache version'] =  [
         'title' => t('Apache version'),
         'value' => $apache_version_string,
         'severity' => REQUIREMENT_ERROR,
-        'description' => t('The minimum version of Apache needed to run Drupal without mod_rewrite enabled is 2.2.16. See the <a href=":link">enabling clean URLs</a> page for more information on mod_rewrite.', array(':link' => 'http://drupal.org/node/15365')),
-      );
+        'description' => t('The minimum version of Apache needed to run Drupal without mod_rewrite enabled is 2.2.16. See the <a href=":link">enabling clean URLs</a> page for more information on mod_rewrite.', [':link' => 'http://drupal.org/node/15365']),
+      ];
     }
 
     if (!$rewrite_error && !$rewrite_warning) {
-      $requirements['rewrite_module'] = array (
+      $requirements['rewrite_module'] =  [
         'title' => t('Clean URLs'),
         'value' => t('Disabled'),
         'severity' => REQUIREMENT_WARNING,
-        'description' => t('Your server is capable of using clean URLs, but it is not enabled. Using clean URLs gives an improved user experience and is recommended. <a href=":link">Enable clean URLs</a>', array(':link' => 'http://drupal.org/node/15365')),
-      );
+        'description' => t('Your server is capable of using clean URLs, but it is not enabled. Using clean URLs gives an improved user experience and is recommended. <a href=":link">Enable clean URLs</a>', [':link' => 'http://drupal.org/node/15365']),
+      ];
     }
   }
 
@@ -160,22 +160,22 @@ function system_requirements($phase) {
     if ($phase === 'runtime') {
       $phpversion_label = t('@phpversion (<a href=":url">more information</a>)', ['@phpversion' => $phpversion, ':url' => (new Url('system.php'))->toString()]);
     }
-    $requirements['php'] = array(
+    $requirements['php'] = [
       'title' => t('PHP'),
       'value' => $phpversion_label,
-    );
+    ];
   }
   else {
-    $requirements['php'] = array(
+    $requirements['php'] = [
       'title' => t('PHP'),
       'value' => $phpversion_label,
-      'description' => t('The phpinfo() function has been disabled for security reasons. To see your server\'s phpinfo() information, change your PHP settings or contact your server administrator. For more information, <a href=":phpinfo">Enabling and disabling phpinfo()</a> handbook page.', array(':phpinfo' => 'https://www.drupal.org/node/243993')),
+      'description' => t('The phpinfo() function has been disabled for security reasons. To see your server\'s phpinfo() information, change your PHP settings or contact your server administrator. For more information, <a href=":phpinfo">Enabling and disabling phpinfo()</a> handbook page.', [':phpinfo' => 'https://www.drupal.org/node/243993']),
       'severity' => REQUIREMENT_INFO,
-    );
+    ];
   }
 
   if (version_compare($phpversion, DRUPAL_MINIMUM_PHP) < 0) {
-    $requirements['php']['description'] = t('Your PHP installation is too old. Drupal requires at least PHP %version.', array('%version' => DRUPAL_MINIMUM_PHP));
+    $requirements['php']['description'] = t('Your PHP installation is too old. Drupal requires at least PHP %version.', ['%version' => DRUPAL_MINIMUM_PHP]);
     $requirements['php']['severity'] = REQUIREMENT_ERROR;
     // If PHP is old, it's not safe to continue with the requirements check.
     return $requirements;
@@ -184,21 +184,21 @@ function system_requirements($phase) {
   // Suggest to update to at least 5.5.21 or 5.6.5 for disabling multiple
   // statements.
   if (($phase === 'install' || \Drupal::database()->driver() === 'mysql') && !SystemRequirements::phpVersionWithPdoDisallowMultipleStatements($phpversion)) {
-    $requirements['php'] = array(
+    $requirements['php'] = [
       'title' => t('PHP (multiple statement disabling)'),
       'value' => $phpversion_label,
       'description' => t('PHP versions higher than 5.6.5 or 5.5.21 provide built-in SQL injection protection for mysql databases. It is recommended to update.'),
       'severity' => REQUIREMENT_INFO,
-    );
+    ];
   }
 
   // Test for PHP extensions.
-  $requirements['php_extensions'] = array(
+  $requirements['php_extensions'] = [
     'title' => t('PHP extensions'),
-  );
+  ];
 
-  $missing_extensions = array();
-  $required_extensions = array(
+  $missing_extensions = [];
+  $required_extensions = [
     'date',
     'dom',
     'filter',
@@ -212,7 +212,7 @@ function system_requirements($phase) {
     'SPL',
     'tokenizer',
     'xml',
-  );
+  ];
   foreach ($required_extensions as $extension) {
     if (!extension_loaded($extension)) {
       $missing_extensions[] = $extension;
@@ -220,22 +220,22 @@ function system_requirements($phase) {
   }
 
   if (!empty($missing_extensions)) {
-    $description = t('Drupal requires you to enable the PHP extensions in the following list (see the <a href=":system_requirements">system requirements page</a> for more information):', array(
+    $description = t('Drupal requires you to enable the PHP extensions in the following list (see the <a href=":system_requirements">system requirements page</a> for more information):', [
       ':system_requirements' => 'https://www.drupal.org/requirements',
-    ));
+    ]);
 
     // We use twig inline_template to avoid twig's autoescape.
-    $description = array(
+    $description = [
       '#type' => 'inline_template',
       '#template' => '{{ description }}{{ missing_extensions }}',
-      '#context' => array(
+      '#context' => [
         'description' => $description,
-        'missing_extensions' => array(
+        'missing_extensions' => [
           '#theme' => 'item_list',
           '#items' => $missing_extensions,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     $requirements['php_extensions']['value'] = t('Disabled');
     $requirements['php_extensions']['severity'] = REQUIREMENT_ERROR;
@@ -248,11 +248,11 @@ function system_requirements($phase) {
   if ($phase == 'install' || $phase == 'runtime') {
     // Check to see if OPcache is installed.
     if (!OpCodeCache::isEnabled()) {
-      $requirements['php_opcache'] = array(
+      $requirements['php_opcache'] = [
         'value' => t('Not enabled'),
         'severity' => REQUIREMENT_WARNING,
         'description' => t('PHP OPcode caching can improve your site\'s performance considerably. It is <strong>highly recommended</strong> to have <a href="http://php.net/manual/opcache.installation.php" target="_blank">OPcache</a> installed on your server.'),
-      );
+      ];
     }
     else {
       $requirements['php_opcache']['value'] = t('Enabled');
@@ -262,13 +262,13 @@ function system_requirements($phase) {
 
   if ($phase != 'update') {
     // Test whether we have a good source of random bytes.
-    $requirements['php_random_bytes'] = array(
+    $requirements['php_random_bytes'] = [
       'title' => t('Random number generation'),
-    );
+    ];
     try {
       $bytes = random_bytes(10);
       if (strlen($bytes) != 10) {
-        throw new \Exception(t('Tried to generate 10 random bytes, generated @count', array('@count' => strlen($bytes))));
+        throw new \Exception(t('Tried to generate 10 random bytes, generated @count', ['@count' => strlen($bytes)]));
       }
       $requirements['php_random_bytes']['value'] = t('Successful');
     }
@@ -280,13 +280,13 @@ function system_requirements($phase) {
         $open_basedir = ini_get('open_basedir');
         if ($open_basedir) {
           $open_basedir_paths = explode(PATH_SEPARATOR, $open_basedir);
-          $open_basedir_blocks_urandom = !array_intersect(array('/dev', '/dev/', '/dev/urandom'), $open_basedir_paths);
+          $open_basedir_blocks_urandom = !array_intersect(['/dev', '/dev/', '/dev/urandom'], $open_basedir_paths);
         }
       }
-      $args = array(
+      $args = [
         ':drupal-php' => 'https://www.drupal.org/docs/7/system-requirements/php#csprng',
         '%exception_message' => $e->getMessage(),
-      );
+      ];
       if ($open_basedir_blocks_urandom) {
         $requirements['php_random_bytes']['description'] = t('Drupal is unable to generate highly randomized numbers, which means certain security features like password reset URLs are not as secure as they should be. Instead, only a slow, less-secure fallback generator is available. The most likely cause is that open_basedir restrictions are in effect and /dev/urandom is not on the whitelist. See the <a href=":drupal-php">system requirements</a> page for more information. %exception_message', $args);
       }
@@ -300,33 +300,33 @@ function system_requirements($phase) {
 
   if ($phase == 'install' || $phase == 'update') {
     // Test for PDO (database).
-    $requirements['database_extensions'] = array(
+    $requirements['database_extensions'] = [
       'title' => t('Database support'),
-    );
+    ];
 
     // Make sure PDO is available.
     $database_ok = extension_loaded('pdo');
     if (!$database_ok) {
-      $pdo_message = t('Your web server does not appear to support PDO (PHP Data Objects). Ask your hosting provider if they support the native PDO extension. See the <a href=":link">system requirements</a> page for more information.', array(
+      $pdo_message = t('Your web server does not appear to support PDO (PHP Data Objects). Ask your hosting provider if they support the native PDO extension. See the <a href=":link">system requirements</a> page for more information.', [
         ':link' => 'https://www.drupal.org/requirements/pdo',
-      ));
+      ]);
     }
     else {
       // Make sure at least one supported database driver exists.
       $drivers = drupal_detect_database_types();
       if (empty($drivers)) {
         $database_ok = FALSE;
-        $pdo_message = t('Your web server does not appear to support any common PDO database extensions. Check with your hosting provider to see if they support PDO (PHP Data Objects) and offer any databases that <a href=":drupal-databases">Drupal supports</a>.', array(
+        $pdo_message = t('Your web server does not appear to support any common PDO database extensions. Check with your hosting provider to see if they support PDO (PHP Data Objects) and offer any databases that <a href=":drupal-databases">Drupal supports</a>.', [
           ':drupal-databases' => 'https://www.drupal.org/requirements/database',
-        ));
+        ]);
       }
       // Make sure the native PDO extension is available, not the older PEAR
       // version. (See install_verify_pdo() for details.)
       if (!defined('PDO::ATTR_DEFAULT_FETCH_MODE')) {
         $database_ok = FALSE;
-        $pdo_message = t('Your web server seems to have the wrong version of PDO installed. Drupal requires the PDO extension from PHP core. This system has the older PECL version. See the <a href=":link">system requirements</a> page for more information.', array(
+        $pdo_message = t('Your web server seems to have the wrong version of PDO installed. Drupal requires the PDO extension from PHP core. This system has the older PECL version. See the <a href=":link">system requirements</a> page for more information.', [
           ':link' => 'https://www.drupal.org/requirements/pdo#pecl',
-        ));
+        ]);
       }
     }
 
@@ -343,54 +343,54 @@ function system_requirements($phase) {
     // Database information.
     $class = Database::getConnection()->getDriverClass('Install\\Tasks');
     $tasks = new $class();
-    $requirements['database_system'] = array(
+    $requirements['database_system'] = [
       'title' => t('Database system'),
       'value' => $tasks->name(),
-    );
-    $requirements['database_system_version'] = array(
+    ];
+    $requirements['database_system_version'] = [
       'title' => t('Database system version'),
       'value' => Database::getConnection()->version(),
-    );
+    ];
   }
 
   // Test PHP memory_limit
   $memory_limit = ini_get('memory_limit');
-  $requirements['php_memory_limit'] = array(
+  $requirements['php_memory_limit'] = [
     'title' => t('PHP memory limit'),
     'value' => $memory_limit == -1 ? t('-1 (Unlimited)') : $memory_limit,
-  );
+  ];
 
   if (!Environment::checkMemoryLimit(DRUPAL_MINIMUM_PHP_MEMORY_LIMIT, $memory_limit)) {
-    $description = array();
+    $description = [];
     if ($phase == 'install') {
-      $description['phase'] = t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the installation process.', array('%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
+      $description['phase'] = t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the installation process.', ['%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT]);
     }
     elseif ($phase == 'update') {
-      $description['phase'] = t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the update process.', array('%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
+      $description['phase'] = t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the update process.', ['%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT]);
     }
     elseif ($phase == 'runtime') {
-      $description['phase'] = t('Depending on your configuration, Drupal can run with a %memory_limit PHP memory limit. However, a %memory_minimum_limit PHP memory limit or above is recommended, especially if your site uses additional custom or contributed modules.', array('%memory_limit' => $memory_limit, '%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
+      $description['phase'] = t('Depending on your configuration, Drupal can run with a %memory_limit PHP memory limit. However, a %memory_minimum_limit PHP memory limit or above is recommended, especially if your site uses additional custom or contributed modules.', ['%memory_limit' => $memory_limit, '%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT]);
     }
 
     if (!empty($description['phase'])) {
       if ($php_ini_path = get_cfg_var('cfg_file_path')) {
-        $description['memory'] = t('Increase the memory limit by editing the memory_limit parameter in the file %configuration-file and then restart your web server (or contact your system administrator or hosting provider for assistance).', array('%configuration-file' => $php_ini_path));
+        $description['memory'] = t('Increase the memory limit by editing the memory_limit parameter in the file %configuration-file and then restart your web server (or contact your system administrator or hosting provider for assistance).', ['%configuration-file' => $php_ini_path]);
       }
       else {
         $description['memory'] = t('Contact your system administrator or hosting provider for assistance with increasing your PHP memory limit.');
       }
 
-      $handbook_link = t('For more information, see the online handbook entry for <a href=":memory-limit">increasing the PHP memory limit</a>.', array(':memory-limit' => 'https://www.drupal.org/node/207036'));
+      $handbook_link = t('For more information, see the online handbook entry for <a href=":memory-limit">increasing the PHP memory limit</a>.', [':memory-limit' => 'https://www.drupal.org/node/207036']);
 
-      $description = array(
+      $description = [
         '#type' => 'inline_template',
         '#template' => '{{ description_phase }} {{ description_memory }} {{ handbook }}',
-        '#context' => array(
+        '#context' => [
           'description_phase' => $description['phase'],
           'description_memory' => $description['memory'],
           'handbook' => $handbook_link,
-        ),
-      );
+        ],
+      ];
 
       $requirements['php_memory_limit']['description'] = $description;
       $requirements['php_memory_limit']['severity'] = REQUIREMENT_WARNING;
@@ -399,7 +399,7 @@ function system_requirements($phase) {
 
   // Test configuration files and directory for writability.
   if ($phase == 'runtime') {
-    $conf_errors = array();
+    $conf_errors = [];
     // Find the site path. Kernel service is not always available at this point,
     // but is preferred, when available.
     if (\Drupal::hasService('kernel')) {
@@ -421,13 +421,13 @@ function system_requirements($phase) {
       // In normal operation, writable files or directories are an error.
       $file_protection_severity = REQUIREMENT_ERROR;
       if (!drupal_verify_install_file($site_path, FILE_NOT_WRITABLE, 'dir')) {
-        $conf_errors[] = t("The directory %file is not protected from modifications and poses a security risk. You must change the directory's permissions to be non-writable.", array('%file' => $site_path));
+        $conf_errors[] = t("The directory %file is not protected from modifications and poses a security risk. You must change the directory's permissions to be non-writable.", ['%file' => $site_path]);
       }
     }
-    foreach (array('settings.php', 'settings.local.php', 'services.yml') as $conf_file) {
+    foreach (['settings.php', 'settings.local.php', 'services.yml'] as $conf_file) {
       $full_path = $site_path . '/' . $conf_file;
       if (file_exists($full_path) && (Settings::get('skip_permissions_hardening') || !drupal_verify_install_file($full_path, FILE_EXIST | FILE_READABLE | FILE_NOT_WRITABLE))) {
-        $conf_errors[] = t("The file %file is not protected from modifications and poses a security risk. You must change the file's permissions to be non-writable.", array('%file' => $full_path));
+        $conf_errors[] = t("The file %file is not protected from modifications and poses a security risk. You must change the file's permissions to be non-writable.", ['%file' => $full_path]);
       }
     }
     if (!empty($conf_errors)) {
@@ -436,27 +436,27 @@ function system_requirements($phase) {
       }
       else {
         // We use twig inline_template to avoid double escaping.
-        $description = array(
+        $description = [
           '#type' => 'inline_template',
           '#template' => '{{ configuration_error_list }}',
-          '#context' => array(
-            'configuration_error_list' => array(
+          '#context' => [
+            'configuration_error_list' => [
               '#theme' => 'item_list',
               '#items' => $conf_errors,
-            ),
-          ),
-        );
+            ],
+          ],
+        ];
       }
-      $requirements['configuration_files'] = array(
+      $requirements['configuration_files'] = [
         'value' => t('Not protected'),
         'severity' => $file_protection_severity,
         'description' => $description,
-      );
+      ];
     }
     else {
-      $requirements['configuration_files'] = array(
+      $requirements['configuration_files'] = [
         'value' => t('Protected'),
-      );
+      ];
     }
     $requirements['configuration_files']['title'] = t('Configuration files');
   }
@@ -466,31 +466,31 @@ function system_requirements($phase) {
     // Try to write the .htaccess files first, to prevent false alarms in case
     // (for example) the /tmp directory was wiped.
     file_ensure_htaccess();
-    $htaccess_files['public://.htaccess'] = array(
+    $htaccess_files['public://.htaccess'] = [
       'title' => t('Public files directory'),
       'directory' => drupal_realpath('public://'),
-    );
+    ];
     if (PrivateStream::basePath()) {
-      $htaccess_files['private://.htaccess'] = array(
+      $htaccess_files['private://.htaccess'] = [
         'title' => t('Private files directory'),
         'directory' => drupal_realpath('private://'),
-      );
+      ];
     }
-    $htaccess_files['temporary://.htaccess'] = array(
+    $htaccess_files['temporary://.htaccess'] = [
       'title' => t('Temporary files directory'),
       'directory' => drupal_realpath('temporary://'),
-    );
+    ];
     foreach ($htaccess_files as $htaccess_file => $info) {
       // Check for the string which was added to the recommended .htaccess file
       // in the latest security update.
       if (!file_exists($htaccess_file) || !($contents = @file_get_contents($htaccess_file)) || strpos($contents, 'Drupal_Security_Do_Not_Remove_See_SA_2013_003') === FALSE) {
         $url = 'https://www.drupal.org/SA-CORE-2013-003';
-        $requirements[$htaccess_file] = array(
+        $requirements[$htaccess_file] = [
           'title' => $info['title'],
           'value' => t('Not fully protected'),
           'severity' => REQUIREMENT_ERROR,
-          'description' => t('See <a href=":url">@url</a> for information about the recommended .htaccess file which should be added to the %directory directory to help protect against arbitrary code execution.', array(':url' => $url, '@url' => $url, '%directory' => $info['directory'])),
-        );
+          'description' => t('See <a href=":url">@url</a> for information about the recommended .htaccess file which should be added to the %directory directory to help protect against arbitrary code execution.', [':url' => $url, '@url' => $url, '%directory' => $info['directory']]),
+        ];
       }
     }
   }
@@ -519,13 +519,13 @@ function system_requirements($phase) {
     }
 
     // Set summary and description based on values determined above.
-    $summary = t('Last run @time ago', array('@time' => \Drupal::service('date.formatter')->formatTimeDiffSince($cron_last)));
+    $summary = t('Last run @time ago', ['@time' => \Drupal::service('date.formatter')->formatTimeDiffSince($cron_last)]);
 
-    $requirements['cron'] = array(
+    $requirements['cron'] = [
       'title' => t('Cron maintenance tasks'),
       'severity' => $severity,
       'value' => $summary,
-    );
+    ];
     if ($severity != REQUIREMENT_INFO) {
       $requirements['cron']['description'][] = [
         [
@@ -557,19 +557,19 @@ function system_requirements($phase) {
   }
   if ($phase != 'install') {
     $filesystem_config = \Drupal::config('system.file');
-    $directories = array(
+    $directories = [
       PublicStream::basePath(),
       // By default no private files directory is configured. For private files
       // to be secure the admin needs to provide a path outside the webroot.
       PrivateStream::basePath(),
       file_directory_temp(),
-    );
+    ];
   }
 
   // During an install we need to make assumptions about the file system
   // unless overrides are provided in settings.php.
   if ($phase == 'install') {
-    $directories = array();
+    $directories = [];
     if ($file_public_path = Settings::get('file_public_path')) {
       $directories[] = $file_public_path;
     }
@@ -605,31 +605,31 @@ function system_requirements($phase) {
       }
       if (!is_dir($directory)) {
         if ($phase == 'install') {
-          $description = t('An automated attempt to create the directory %directory failed, possibly due to a permissions problem. To proceed with the installation, either create the directory and modify its permissions manually or ensure that the installer has the permissions to create it automatically. For more information, see INSTALL.txt or the <a href=":handbook_url">online handbook</a>.', array('%directory' => $directory, ':handbook_url' => 'https://www.drupal.org/server-permissions'));
+          $description = t('An automated attempt to create the directory %directory failed, possibly due to a permissions problem. To proceed with the installation, either create the directory and modify its permissions manually or ensure that the installer has the permissions to create it automatically. For more information, see INSTALL.txt or the <a href=":handbook_url">online handbook</a>.', ['%directory' => $directory, ':handbook_url' => 'https://www.drupal.org/server-permissions']);
         }
         else {
-          $description = t('The directory %directory does not exist.', array('%directory' => $directory));
+          $description = t('The directory %directory does not exist.', ['%directory' => $directory]);
         }
-        $requirements['config directory ' . $type] = array(
+        $requirements['config directory ' . $type] = [
           'title' => t('Configuration directory: %type', ['%type' => $type]),
           'description' => $description,
           'severity' => REQUIREMENT_ERROR,
-        );
+        ];
       }
     }
   }
   if ($phase != 'install' && (empty($GLOBALS['config_directories']) || empty($GLOBALS['config_directories'][CONFIG_SYNC_DIRECTORY]) )) {
-    $requirements['config directories'] = array(
+    $requirements['config directories'] = [
       'title' => t('Configuration directories'),
       'value' => t('Not present'),
-      'description' => t('Your %file file must define the $config_directories variable as an array containing the names of directories in which configuration files can be found. It must contain a %sync_key key.', array('%file' => $site_path . '/settings.php', '%sync_key' => CONFIG_SYNC_DIRECTORY)),
+      'description' => t('Your %file file must define the $config_directories variable as an array containing the names of directories in which configuration files can be found. It must contain a %sync_key key.', ['%file' => $site_path . '/settings.php', '%sync_key' => CONFIG_SYNC_DIRECTORY]),
       'severity' => REQUIREMENT_ERROR,
-    );
+    ];
   }
 
-  $requirements['file system'] = array(
+  $requirements['file system'] = [
     'title' => t('File system'),
-  );
+  ];
 
   $error = '';
   // For installer, create the directories if possible.
@@ -646,30 +646,30 @@ function system_requirements($phase) {
       $description = '';
       $requirements['file system']['value'] = t('Not writable');
       if (!$is_directory) {
-        $error = t('The directory %directory does not exist.', array('%directory' => $directory));
+        $error = t('The directory %directory does not exist.', ['%directory' => $directory]);
       }
       else {
-        $error = t('The directory %directory is not writable.', array('%directory' => $directory));
+        $error = t('The directory %directory is not writable.', ['%directory' => $directory]);
       }
       // The files directory requirement check is done only during install and runtime.
       if ($phase == 'runtime') {
-        $description = t('You may need to set the correct directory at the <a href=":admin-file-system">file system settings page</a> or change the current directory\'s permissions so that it is writable.', array(':admin-file-system' => \Drupal::url('system.file_system_settings')));
+        $description = t('You may need to set the correct directory at the <a href=":admin-file-system">file system settings page</a> or change the current directory\'s permissions so that it is writable.', [':admin-file-system' => \Drupal::url('system.file_system_settings')]);
       }
       elseif ($phase == 'install') {
         // For the installer UI, we need different wording. 'value' will
         // be treated as version, so provide none there.
-        $description = t('An automated attempt to create this directory failed, possibly due to a permissions problem. To proceed with the installation, either create the directory and modify its permissions manually or ensure that the installer has the permissions to create it automatically. For more information, see INSTALL.txt or the <a href=":handbook_url">online handbook</a>.', array(':handbook_url' => 'https://www.drupal.org/server-permissions'));
+        $description = t('An automated attempt to create this directory failed, possibly due to a permissions problem. To proceed with the installation, either create the directory and modify its permissions manually or ensure that the installer has the permissions to create it automatically. For more information, see INSTALL.txt or the <a href=":handbook_url">online handbook</a>.', [':handbook_url' => 'https://www.drupal.org/server-permissions']);
         $requirements['file system']['value'] = '';
       }
       if (!empty($description)) {
-        $description = array(
+        $description = [
           '#type' => 'inline_template',
           '#template' => '{{ error }} {{ description }}',
-          '#context' => array(
+          '#context' => [
             'error' => $error,
             'description' => $description,
-          ),
-        );
+          ],
+        ];
         $requirements['file system']['description'] = $description;
         $requirements['file system']['severity'] = REQUIREMENT_ERROR;
       }
@@ -688,10 +688,10 @@ function system_requirements($phase) {
 
   // See if updates are available in update.php.
   if ($phase == 'runtime') {
-    $requirements['update'] = array(
+    $requirements['update'] = [
       'title' => t('Database updates'),
       'value' => t('Up to date'),
-    );
+    ];
 
     // Check installed modules.
     $has_pending_updates = FALSE;
@@ -717,7 +717,7 @@ function system_requirements($phase) {
     if ($has_pending_updates) {
       $requirements['update']['severity'] = REQUIREMENT_ERROR;
       $requirements['update']['value'] = t('Out of date');
-      $requirements['update']['description'] = t('Some modules have database schema updates to install. You should run the <a href=":update">database update script</a> immediately.', array(':update' => \Drupal::url('system.db_update')));
+      $requirements['update']['description'] = t('Some modules have database schema updates to install. You should run the <a href=":update">database update script</a> immediately.', [':update' => \Drupal::url('system.db_update')]);
     }
 
     $requirements['entity_update'] = [
@@ -746,16 +746,16 @@ function system_requirements($phase) {
   // Verify the update.php access setting
   if ($phase == 'runtime') {
     if (Settings::get('update_free_access')) {
-      $requirements['update access'] = array(
+      $requirements['update access'] = [
         'value' => t('Not protected'),
         'severity' => REQUIREMENT_ERROR,
-        'description' => t('The update.php script is accessible to everyone without authentication check, which is a security risk. You must change the @settings_name value in your settings.php back to FALSE.', array('@settings_name' => '$settings[\'update_free_access\']')),
-      );
+        'description' => t('The update.php script is accessible to everyone without authentication check, which is a security risk. You must change the @settings_name value in your settings.php back to FALSE.', ['@settings_name' => '$settings[\'update_free_access\']']),
+      ];
     }
     else {
-      $requirements['update access'] = array(
+      $requirements['update access'] = [
         'value' => t('Protected'),
-      );
+      ];
     }
     $requirements['update access']['title'] = t('Access to update.php');
   }
@@ -773,7 +773,7 @@ function system_requirements($phase) {
       $name = $file->info['name'];
       $php = $file->info['php'];
       if (version_compare($php, PHP_VERSION, '>')) {
-        $requirements['php']['description'] .= t('@name requires at least PHP @version.', array('@name' => $name, '@version' => $php));
+        $requirements['php']['description'] .= t('@name requires at least PHP @version.', ['@name' => $name, '@version' => $php]);
         $requirements['php']['severity'] = REQUIREMENT_ERROR;
       }
       // Check the module's required modules.
@@ -781,12 +781,12 @@ function system_requirements($phase) {
         $required_module = $requirement['name'];
         // Check if the module exists.
         if (!isset($files[$required_module])) {
-          $requirements["$module-$required_module"] = array(
+          $requirements["$module-$required_module"] = [
             'title' => t('Unresolved dependency'),
-            'description' => t('@name requires this module.', array('@name' => $name)),
-            'value' => t('@required_name (Missing)', array('@required_name' => $required_module)),
+            'description' => t('@name requires this module.', ['@name' => $name]),
+            'value' => t('@required_name (Missing)', ['@required_name' => $required_module]),
             'severity' => REQUIREMENT_ERROR,
-          );
+          ];
           continue;
         }
         // Check for an incompatible version.
@@ -796,12 +796,12 @@ function system_requirements($phase) {
         $compatibility = drupal_check_incompatibility($requirement, $version);
         if ($compatibility) {
           $compatibility = rtrim(substr($compatibility, 2), ')');
-          $requirements["$module-$required_module"] = array(
+          $requirements["$module-$required_module"] = [
             'title' => t('Unresolved dependency'),
-            'description' => t('@name requires this module and version. Currently using @required_name version @version', array('@name' => $name, '@required_name' => $required_name, '@version' => $version)),
-            'value' => t('@required_name (Version @compatibility required)', array('@required_name' => $required_name, '@compatibility' => $compatibility)),
+            'description' => t('@name requires this module and version. Currently using @required_name version @version', ['@name' => $name, '@required_name' => $required_name, '@version' => $version]),
+            'value' => t('@required_name (Version @compatibility required)', ['@required_name' => $required_name, '@compatibility' => $compatibility]),
             'severity' => REQUIREMENT_ERROR,
-          );
+          ];
           continue;
         }
       }
@@ -815,29 +815,29 @@ function system_requirements($phase) {
   if ($phase == 'runtime') {
     // Check for update status module.
     if (!\Drupal::moduleHandler()->moduleExists('update')) {
-      $requirements['update status'] = array(
+      $requirements['update status'] = [
         'value' => t('Not enabled'),
         'severity' => REQUIREMENT_WARNING,
-        'description' => t('Update notifications are not enabled. It is <strong>highly recommended</strong> that you enable the Update Manager module from the <a href=":module">module administration page</a> in order to stay up-to-date on new releases. For more information, <a href=":update">Update status handbook page</a>.', array(
+        'description' => t('Update notifications are not enabled. It is <strong>highly recommended</strong> that you enable the Update Manager module from the <a href=":module">module administration page</a> in order to stay up-to-date on new releases. For more information, <a href=":update">Update status handbook page</a>.', [
           ':update' => 'https://www.drupal.org/documentation/modules/update',
           ':module' => \Drupal::url('system.modules_list'),
-        )),
-      );
+        ]),
+      ];
     }
     else {
-      $requirements['update status'] = array(
+      $requirements['update status'] = [
         'value' => t('Enabled'),
-      );
+      ];
     }
     $requirements['update status']['title'] = t('Update notifications');
 
     if (Settings::get('rebuild_access')) {
-      $requirements['rebuild access'] = array(
+      $requirements['rebuild access'] = [
         'title' => t('Rebuild access'),
         'value' => t('Enabled'),
         'severity' => REQUIREMENT_ERROR,
         'description' => t('The rebuild_access setting is enabled in settings.php. It is recommended to have this setting disabled unless you are performing a rebuild.'),
-      );
+      ];
     }
   }
 
@@ -846,19 +846,19 @@ function system_requirements($phase) {
   if ($phase == 'runtime') {
     $trusted_host_patterns = Settings::get('trusted_host_patterns');
     if (empty($trusted_host_patterns)) {
-      $requirements['trusted_host_patterns'] = array(
+      $requirements['trusted_host_patterns'] = [
         'title' => t('Trusted Host Settings'),
         'value' => t('Not enabled'),
-        'description' => t('The trusted_host_patterns setting is not configured in settings.php. This can lead to security vulnerabilities. It is <strong>highly recommended</strong> that you configure this. See <a href=":url">Protecting against HTTP HOST Header attacks</a> for more information.', array(':url' => 'https://www.drupal.org/node/1992030')),
+        'description' => t('The trusted_host_patterns setting is not configured in settings.php. This can lead to security vulnerabilities. It is <strong>highly recommended</strong> that you configure this. See <a href=":url">Protecting against HTTP HOST Header attacks</a> for more information.', [':url' => 'https://www.drupal.org/node/1992030']),
         'severity' => REQUIREMENT_ERROR,
-      );
+      ];
     }
     else {
-      $requirements['trusted_host_patterns'] = array(
+      $requirements['trusted_host_patterns'] = [
         'title' => t('Trusted Host Settings'),
         'value' => t('Enabled'),
-        'description' => t('The trusted_host_patterns setting is set to allow %trusted_host_patterns', array('%trusted_host_patterns' => join(', ', $trusted_host_patterns))),
-      );
+        'description' => t('The trusted_host_patterns setting is set to allow %trusted_host_patterns', ['%trusted_host_patterns' => join(', ', $trusted_host_patterns)]),
+      ];
     }
   }
 
@@ -954,133 +954,133 @@ function system_install() {
  * Implements hook_schema().
  */
 function system_schema() {
-  $schema['key_value'] = array(
+  $schema['key_value'] = [
     'description' => 'Generic key-value storage table. See the state system for an example.',
-    'fields' => array(
-      'collection' => array(
+    'fields' => [
+      'collection' => [
         'description' => 'A named collection of key and value pairs.',
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'name' => array(
+      ],
+      'name' => [
         'description' => 'The key of the key-value pair. As KEY is a SQL reserved keyword, name was chosen instead.',
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'value' => array(
+      ],
+      'value' => [
         'description' => 'The value.',
         'type' => 'blob',
         'not null' => TRUE,
         'size' => 'big',
-      ),
-    ),
-    'primary key' => array('collection', 'name'),
-  );
+      ],
+    ],
+    'primary key' => ['collection', 'name'],
+  ];
 
-  $schema['key_value_expire'] = array(
+  $schema['key_value_expire'] = [
     'description' => 'Generic key/value storage table with an expiration.',
-    'fields' => array(
-      'collection' => array(
+    'fields' => [
+      'collection' => [
         'description' => 'A named collection of key and value pairs.',
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'name' => array(
+      ],
+      'name' => [
         // KEY is an SQL reserved word, so use 'name' as the key's field name.
         'description' => 'The key of the key/value pair.',
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'value' => array(
+      ],
+      'value' => [
         'description' => 'The value of the key/value pair.',
         'type' => 'blob',
         'not null' => TRUE,
         'size' => 'big',
-      ),
-      'expire' => array(
+      ],
+      'expire' => [
         'description' => 'The time since Unix epoch in seconds when this item expires. Defaults to the maximum possible time.',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 2147483647,
-      ),
-    ),
-    'primary key' => array('collection', 'name'),
-    'indexes' => array(
-      'all' => array('name', 'collection', 'expire'),
-      'expire' => array('expire'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['collection', 'name'],
+    'indexes' => [
+      'all' => ['name', 'collection', 'expire'],
+      'expire' => ['expire'],
+    ],
+  ];
 
-  $schema['sequences'] = array(
+  $schema['sequences'] = [
     'description' => 'Stores IDs.',
-    'fields' => array(
-      'value' => array(
+    'fields' => [
+      'value' => [
         'description' => 'The value of the sequence.',
         'type' => 'serial',
         'unsigned' => TRUE,
         'not null' => TRUE,
-      ),
-     ),
-    'primary key' => array('value'),
-  );
+      ],
+     ],
+    'primary key' => ['value'],
+  ];
 
-  $schema['sessions'] = array(
+  $schema['sessions'] = [
     'description' => "Drupal's session handlers read and write into the sessions table. Each record represents a user session, either anonymous or authenticated.",
-    'fields' => array(
-      'uid' => array(
+    'fields' => [
+      'uid' => [
         'description' => 'The {users}.uid corresponding to a session, or 0 for anonymous user.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
-      ),
-      'sid' => array(
+      ],
+      'sid' => [
         'description' => "A session ID (hashed). The value is generated by Drupal's session handlers.",
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
-      ),
-      'hostname' => array(
+      ],
+      'hostname' => [
         'description' => 'The IP address that last used this session ID (sid).',
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'timestamp' => array(
+      ],
+      'timestamp' => [
         'description' => 'The Unix timestamp when this session last requested a page. Old records are purged by PHP automatically.',
         'type' => 'int',
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'session' => array(
+      ],
+      'session' => [
         'description' => 'The serialized contents of $_SESSION, an array of name/value pairs that persists across page requests by this session ID. Drupal loads $_SESSION from here at the start of each request and saves it at the end.',
         'type' => 'blob',
         'not null' => FALSE,
         'size' => 'big',
-      ),
-    ),
-    'primary key' => array(
+      ],
+    ],
+    'primary key' => [
       'sid',
-    ),
-    'indexes' => array(
-      'timestamp' => array('timestamp'),
-      'uid' => array('uid'),
-    ),
-    'foreign keys' => array(
-      'session_user' => array(
+    ],
+    'indexes' => [
+      'timestamp' => ['timestamp'],
+      'uid' => ['uid'],
+    ],
+    'foreign keys' => [
+      'session_user' => [
         'table' => 'users',
-        'columns' => array('uid' => 'uid'),
-      ),
-    ),
-  );
+        'columns' => ['uid' => 'uid'],
+      ],
+    ],
+  ];
 
   // Create the url_alias table. The alias_storage service can auto-create its
   // table, but this relies on exceptions being thrown. These exceptions will be
@@ -1107,38 +1107,38 @@ function system_update_8001(&$sandbox = NULL) {
       // Converting directly to blob can cause problems with reading out and
       // serializing the string data later on postgres, so rename the existing
       // columns and create replacement ones to hold the serialized objects.
-      $old_fields = array(
-        'title' => array(
+      $old_fields = [
+        'title' => [
           'description' => 'The text displayed for the link.',
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'description' => array(
+        ],
+        'description' => [
           'description' => 'The description of this link - used for admin pages and title attribute.',
           'type' => 'text',
           'not null' => FALSE,
-        ),
-      );
+        ],
+      ];
       foreach ($old_fields as $name => $spec) {
         $schema->changeField('menu_tree', $name, 'system_update_8001_' . $name, $spec);
       }
-      $spec = array(
+      $spec = [
         'description' => 'The title for the link. May be a serialized TranslatableMarkup.',
         'type' => 'blob',
         'size' => 'big',
         'not null' => FALSE,
         'serialize' => TRUE,
-      );
+      ];
       $schema->addField('menu_tree', 'title', $spec);
-      $spec = array(
+      $spec = [
         'description' => 'The description of this link - used for admin pages and title attribute.',
         'type' => 'blob',
         'size' => 'big',
         'not null' => FALSE,
         'serialize' => TRUE,
-      );
+      ];
       $schema->addField('menu_tree', 'description', $spec);
 
       $sandbox['current'] = 0;
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index b6f97747d7c9785e98f780a733ec9a5d7775b48a..a1a6b715a3a6a428f99703d4764218a27a2f6318 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -95,29 +95,29 @@ function system_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.system':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The System module is integral to the site: it provides user interfaces for many core systems and settings, as well as the basic administrative menu structure. For more information, see the <a href=":system">online documentation for the System module</a>.', array(':system' => 'https://www.drupal.org/documentation/modules/system')) . '</p>';
+      $output .= '<p>' . t('The System module is integral to the site: it provides user interfaces for many core systems and settings, as well as the basic administrative menu structure. For more information, see the <a href=":system">online documentation for the System module</a>.', [':system' => 'https://www.drupal.org/documentation/modules/system']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing modules') . '</dt>';
-      $output .= '<dd>' . t('Users with appropriate permission can install and uninstall modules from the <a href=":modules">Extend page</a>. Depending on which distribution or installation profile you choose when you install your site, several modules are installed and others are provided but not installed. Each module provides a discrete set of features; modules may be installed or uninstalled depending on the needs of the site. Many additional modules contributed by members of the Drupal community are available for download from the <a href=":drupal-modules">Drupal.org module page</a>. Note that uninstalling a module is a destructive action: when you uninstall a module, you will permanently lose all data connected to the module.', array(':modules' => \Drupal::url('system.modules_list'), ':drupal-modules' => 'https://www.drupal.org/project/modules')) . '</dd>';
+      $output .= '<dd>' . t('Users with appropriate permission can install and uninstall modules from the <a href=":modules">Extend page</a>. Depending on which distribution or installation profile you choose when you install your site, several modules are installed and others are provided but not installed. Each module provides a discrete set of features; modules may be installed or uninstalled depending on the needs of the site. Many additional modules contributed by members of the Drupal community are available for download from the <a href=":drupal-modules">Drupal.org module page</a>. Note that uninstalling a module is a destructive action: when you uninstall a module, you will permanently lose all data connected to the module.', [':modules' => \Drupal::url('system.modules_list'), ':drupal-modules' => 'https://www.drupal.org/project/modules']) . '</dd>';
       $output .= '<dt>' . t('Managing themes') . '</dt>';
-      $output .= '<dd>' . t('Users with appropriate permission can install and uninstall themes on the <a href=":themes">Appearance page</a>. Themes determine the design and presentation of your site. Depending on which distribution or installation profile you choose when you install your site, a default theme is installed, and possibly a different theme for administration pages. Other themes are provided but not installed, and additional contributed themes are available at the <a href=":drupal-themes">Drupal.org theme page</a>.', array(':themes' => \Drupal::url('system.themes_page'), ':drupal-themes' => 'https://www.drupal.org/project/themes')) . '</dd>';
+      $output .= '<dd>' . t('Users with appropriate permission can install and uninstall themes on the <a href=":themes">Appearance page</a>. Themes determine the design and presentation of your site. Depending on which distribution or installation profile you choose when you install your site, a default theme is installed, and possibly a different theme for administration pages. Other themes are provided but not installed, and additional contributed themes are available at the <a href=":drupal-themes">Drupal.org theme page</a>.', [':themes' => \Drupal::url('system.themes_page'), ':drupal-themes' => 'https://www.drupal.org/project/themes']) . '</dd>';
       $output .= '<dt>' . t('Disabling drag-and-drop functionality') . '</dt>';
       $output .= '<dd>' . t('The default drag-and-drop user interface for ordering tables in the administrative interface presents a challenge for some users, including users of screen readers and other assistive technology. The drag-and-drop interface can be disabled in a table by clicking a link labeled "Show row weights" above the table. The replacement interface allows users to order the table by choosing numerical weights instead of dragging table rows.') . '</dd>';
       $output .= '<dt>' . t('Configuring basic site settings') . '</dt>';
-      $output .= '<dd>' . t('The System module provides pages for managing basic site configuration, including <a href=":date-time-settings">Date and time formats</a> and <a href=":site-info">Basic site settings</a> (site name, email address to send mail from, home page, and error pages). Additional configuration pages are listed on the main <a href=":config">Configuration page</a>.', array(':date-time-settings' => \Drupal::url('entity.date_format.collection'), ':site-info' => \Drupal::url('system.site_information_settings'), ':config' => \Drupal::url('system.admin_config'))) . '</dd>';
+      $output .= '<dd>' . t('The System module provides pages for managing basic site configuration, including <a href=":date-time-settings">Date and time formats</a> and <a href=":site-info">Basic site settings</a> (site name, email address to send mail from, home page, and error pages). Additional configuration pages are listed on the main <a href=":config">Configuration page</a>.', [':date-time-settings' => \Drupal::url('entity.date_format.collection'), ':site-info' => \Drupal::url('system.site_information_settings'), ':config' => \Drupal::url('system.admin_config')]) . '</dd>';
       $output .= '<dt>' . t('Checking site status') . '</dt>';
-      $output .= '<dd>' . t('The <a href=":status">Status report</a> provides an overview of the configuration, status, and health of your site. Review this report to make sure there are not any problems to address, and to find information about the software your site and web server are using.', array(':status' => \Drupal::url('system.status'))) . '</dd>';
+      $output .= '<dd>' . t('The <a href=":status">Status report</a> provides an overview of the configuration, status, and health of your site. Review this report to make sure there are not any problems to address, and to find information about the software your site and web server are using.', [':status' => \Drupal::url('system.status')]) . '</dd>';
       $output .= '<dt>' . t('Using maintenance mode') . '</dt>';
-      $output .= '<dd>' . t('When you are performing site maintenance, you can prevent non-administrative users (including anonymous visitors) from viewing your site by putting it in <a href=":maintenance-mode">Maintenance mode</a>. This will prevent unauthorized users from making changes to the site while you are performing maintenance, or from seeing a broken site while updates are in progress.', array(':maintenance-mode' => \Drupal::url('system.site_maintenance_mode'))) . '</dd>';
+      $output .= '<dd>' . t('When you are performing site maintenance, you can prevent non-administrative users (including anonymous visitors) from viewing your site by putting it in <a href=":maintenance-mode">Maintenance mode</a>. This will prevent unauthorized users from making changes to the site while you are performing maintenance, or from seeing a broken site while updates are in progress.', [':maintenance-mode' => \Drupal::url('system.site_maintenance_mode')]) . '</dd>';
       $output .= '<dt>' . t('Configuring for performance') . '</dt>';
-      $output .= '<dd>' . t('On the <a href=":performance-page">Performance page</a>, the site can be configured to aggregate CSS and JavaScript files, making the total request size smaller. Note that, for small- to medium-sized websites, the <a href=":page-cache">Internal Page Cache module</a> should be installed so that pages are efficiently cached and reused for anonymous users. Finally, for websites of all sizes, the <a href=":dynamic-page-cache">Dynamic Page Cache module</a> should also be installed so that the non-personalized parts of pages are efficiently cached (for all users).', array(':performance-page' => \Drupal::url('system.performance_settings'), ':page-cache' => (\Drupal::moduleHandler()->moduleExists('page_cache')) ? \Drupal::url('help.page', array('name' => 'page_cache')) : '#', ':dynamic-page-cache' => (\Drupal::moduleHandler()->moduleExists('dynamic_page_cache')) ? \Drupal::url('help.page', array('name' => 'dynamic_page_cache')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('On the <a href=":performance-page">Performance page</a>, the site can be configured to aggregate CSS and JavaScript files, making the total request size smaller. Note that, for small- to medium-sized websites, the <a href=":page-cache">Internal Page Cache module</a> should be installed so that pages are efficiently cached and reused for anonymous users. Finally, for websites of all sizes, the <a href=":dynamic-page-cache">Dynamic Page Cache module</a> should also be installed so that the non-personalized parts of pages are efficiently cached (for all users).', [':performance-page' => \Drupal::url('system.performance_settings'), ':page-cache' => (\Drupal::moduleHandler()->moduleExists('page_cache')) ? \Drupal::url('help.page', ['name' => 'page_cache']) : '#', ':dynamic-page-cache' => (\Drupal::moduleHandler()->moduleExists('dynamic_page_cache')) ? \Drupal::url('help.page', ['name' => 'dynamic_page_cache']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Configuring cron') . '</dt>';
-      $output .= '<dd>' . t('In order for the site and its modules to continue to operate well, a set of routine administrative operations must run on a regular basis; these operations are known as <em>cron</em> tasks. On the <a href=":cron">Cron page</a>, you can configure cron to run periodically as part of server responses by installing the <em>Automated Cron</em> module, or you can turn this off and trigger cron from an outside process on your web server. You can verify the status of cron tasks by visiting the <a href=":status">Status report page</a>. For more information, see the <a href=":handbook">online documentation for configuring cron jobs</a>.', array(':status' => \Drupal::url('system.status'), ':handbook' => 'https://www.drupal.org/cron', ':cron' => \Drupal::url('system.cron_settings'))) . '</dd>';
+      $output .= '<dd>' . t('In order for the site and its modules to continue to operate well, a set of routine administrative operations must run on a regular basis; these operations are known as <em>cron</em> tasks. On the <a href=":cron">Cron page</a>, you can configure cron to run periodically as part of server responses by installing the <em>Automated Cron</em> module, or you can turn this off and trigger cron from an outside process on your web server. You can verify the status of cron tasks by visiting the <a href=":status">Status report page</a>. For more information, see the <a href=":handbook">online documentation for configuring cron jobs</a>.', [':status' => \Drupal::url('system.status'), ':handbook' => 'https://www.drupal.org/cron', ':cron' => \Drupal::url('system.cron_settings')]) . '</dd>';
       $output .= '<dt>' . t('Configuring the file system') . '</dt>';
-      $output .= '<dd>' . t('Your site has several file directories, which are used to store and process uploaded and generated files. The <em>public</em> file directory, which is configured in your settings.php file, is the default place for storing uploaded files. Links to files in this directory contain the direct file URL, so when the files are requested, the web server will send them directly without invoking your site code. This means that the files can be downloaded by anyone with the file URL, so requests are not access-controlled but they are efficient. The <em>private</em> file directory, also configured in your settings.php file and ideally located outside the site web root, is access controlled. Links to files in this directory are not direct, so requests to these files are mediated by your site code. This means that your site can check file access permission for each file before deciding to fulfill the request, so the requests are more secure, but less efficient. You should only use the private storage for files that need access control, not for files like your site logo and background images used on every page. The <em>temporary</em> file directory is used internally by your site code for various operations, and is configured on the <a href=":file-system">File system settings</a> page. You can also see the configured public and private file directories on this page, and choose whether public or private should be the default for uploaded files.', array(':file-system' => \Drupal::url('system.file_system_settings'))) . '</dd>';
+      $output .= '<dd>' . t('Your site has several file directories, which are used to store and process uploaded and generated files. The <em>public</em> file directory, which is configured in your settings.php file, is the default place for storing uploaded files. Links to files in this directory contain the direct file URL, so when the files are requested, the web server will send them directly without invoking your site code. This means that the files can be downloaded by anyone with the file URL, so requests are not access-controlled but they are efficient. The <em>private</em> file directory, also configured in your settings.php file and ideally located outside the site web root, is access controlled. Links to files in this directory are not direct, so requests to these files are mediated by your site code. This means that your site can check file access permission for each file before deciding to fulfill the request, so the requests are more secure, but less efficient. You should only use the private storage for files that need access control, not for files like your site logo and background images used on every page. The <em>temporary</em> file directory is used internally by your site code for various operations, and is configured on the <a href=":file-system">File system settings</a> page. You can also see the configured public and private file directories on this page, and choose whether public or private should be the default for uploaded files.', [':file-system' => \Drupal::url('system.file_system_settings')]) . '</dd>';
       $output .= '<dt>' . t('Configuring the image toolkit') . '</dt>';
-      $output .= '<dd>' . t('On the <a href=":toolkit">Image toolkit page</a>, you can select and configure the PHP toolkit used to manipulate images. Depending on which distribution or installation profile you choose when you install your site, the GD2 toolkit and possibly others are included; other toolkits may be provided by contributed modules.', array(':toolkit' => \Drupal::url('system.image_toolkit_settings'))) . '</dd>';
+      $output .= '<dd>' . t('On the <a href=":toolkit">Image toolkit page</a>, you can select and configure the PHP toolkit used to manipulate images. Depending on which distribution or installation profile you choose when you install your site, the GD2 toolkit and possibly others are included; other toolkits may be provided by contributed modules.', [':toolkit' => \Drupal::url('system.image_toolkit_settings')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -125,24 +125,24 @@ function system_help($route_name, RouteMatchInterface $route_match) {
       return '<p>' . t('This page shows you all available administration tasks for each module.') . '</p>';
 
     case 'system.themes_page':
-      $output = '<p>' . t('Set and configure the default theme for your website.  Alternative <a href=":themes">themes</a> are available.', array(':themes' => 'https://www.drupal.org/project/themes')) . '</p>';
+      $output = '<p>' . t('Set and configure the default theme for your website.  Alternative <a href=":themes">themes</a> are available.', [':themes' => 'https://www.drupal.org/project/themes']) . '</p>';
       if (\Drupal::moduleHandler()->moduleExists('block')) {
-        $output .= '<p>' . t('You can place blocks for each theme on the <a href=":blocks">block layout</a> page.', array(':blocks' => \Drupal::url('block.admin_display'))) . '</p>';
+        $output .= '<p>' . t('You can place blocks for each theme on the <a href=":blocks">block layout</a> page.', [':blocks' => \Drupal::url('block.admin_display')]) . '</p>';
       }
       return $output;
 
     case 'system.theme_settings_theme':
       $theme_list = \Drupal::service('theme_handler')->listInfo();
       $theme = $theme_list[$route_match->getParameter('theme')];
-      return '<p>' . t('These options control the display settings for the %name theme. When your site is displayed using this theme, these settings will be used.', array('%name' => $theme->info['name'])) . '</p>';
+      return '<p>' . t('These options control the display settings for the %name theme. When your site is displayed using this theme, these settings will be used.', ['%name' => $theme->info['name']]) . '</p>';
 
     case 'system.theme_settings':
       return '<p>' . t('Control default display settings for your site, across all themes. Use theme-specific settings to override these defaults.') . '</p>';
 
     case 'system.modules_list':
-      $output = '<p>' . t('Download additional <a href=":modules">contributed modules</a> to extend your site\'s functionality.', array(':modules' => 'https://www.drupal.org/project/modules')) . '</p>';
+      $output = '<p>' . t('Download additional <a href=":modules">contributed modules</a> to extend your site\'s functionality.', [':modules' => 'https://www.drupal.org/project/modules']) . '</p>';
       if (!\Drupal::moduleHandler()->moduleExists('update')) {
-        $output .= '<p>' . t('Regularly review available updates to maintain a secure and current site. Always run the <a href=":update-php">update script</a> each time a module is updated. Enable the <a href=":update-manager">Update Manager module</a> to update and install modules and themes.', array(':update-php' => \Drupal::url('system.db_update'), ':update-manager' => \Drupal::url('system.modules_list', [], ['fragment' => 'module-update']))) . '</p>';
+        $output .= '<p>' . t('Regularly review available updates to maintain a secure and current site. Always run the <a href=":update-php">update script</a> each time a module is updated. Enable the <a href=":update-manager">Update Manager module</a> to update and install modules and themes.', [':update-php' => \Drupal::url('system.db_update'), ':update-manager' => \Drupal::url('system.modules_list', [], ['fragment' => 'module-update'])]) . '</p>';
       }
       return $output;
 
@@ -168,7 +168,7 @@ function system_help($route_name, RouteMatchInterface $route_match) {
       break;
 
     case 'system.status':
-      return '<p>' . t("Here you can find a short overview of your site's parameters as well as any problems detected with your installation. It may be useful to copy and paste this information into support requests filed on Drupal.org's support forums and project issue queues. Before filing a support request, ensure that your web server meets the <a href=\":system-requirements\">system requirements.</a>", array(':system-requirements' => 'https://www.drupal.org/requirements')) . '</p>';
+      return '<p>' . t("Here you can find a short overview of your site's parameters as well as any problems detected with your installation. It may be useful to copy and paste this information into support requests filed on Drupal.org's support forums and project issue queues. Before filing a support request, ensure that your web server meets the <a href=\":system-requirements\">system requirements.</a>", [':system-requirements' => 'https://www.drupal.org/requirements']) . '</p>';
   }
 }
 
@@ -176,117 +176,117 @@ function system_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function system_theme() {
-  return array_merge(drupal_common_theme(), array(
+  return array_merge(drupal_common_theme(), [
     // Normally theme suggestion templates are only picked up when they are in
     // themes. We explicitly define theme suggestions here so that the block
     // templates in core/modules/system/templates are picked up.
-    'block__system_branding_block' => array(
+    'block__system_branding_block' => [
       'render element' => 'elements',
       'base hook' => 'block',
-    ),
-    'block__system_messages_block' => array(
+    ],
+    'block__system_messages_block' => [
       'base hook' => 'block',
-    ),
-    'block__system_menu_block' => array(
+    ],
+    'block__system_menu_block' => [
       'render element' => 'elements',
       'base hook' => 'block',
-    ),
-    'system_themes_page' => array(
-      'variables' => array(
-        'theme_groups' => array(),
-        'theme_group_titles' => array(),
-      ),
+    ],
+    'system_themes_page' => [
+      'variables' => [
+        'theme_groups' => [],
+        'theme_group_titles' => [],
+      ],
       'file' => 'system.admin.inc',
-    ),
-    'system_config_form' => array(
+    ],
+    'system_config_form' => [
       'render element' => 'form',
-    ),
-    'confirm_form' => array(
+    ],
+    'confirm_form' => [
       'render element' => 'form',
-    ),
-    'system_modules_details' => array(
+    ],
+    'system_modules_details' => [
       'render element' => 'form',
       'file' => 'system.admin.inc',
-    ),
-    'system_modules_uninstall' => array(
+    ],
+    'system_modules_uninstall' => [
       'render element' => 'form',
       'file' => 'system.admin.inc',
-    ),
-    'status_report_page' => array(
-      'variables' => array(
-        'counters' => array(),
-        'general_info' => array(),
+    ],
+    'status_report_page' => [
+      'variables' => [
+        'counters' => [],
+        'general_info' => [],
         'requirements' => NULL,
-      ),
-    ),
-    'status_report' => array(
-      'variables' => array(
+      ],
+    ],
+    'status_report' => [
+      'variables' => [
         'grouped_requirements' => NULL,
         'requirements' => NULL,
-      ),
-    ),
-    'status_report_grouped' => array(
-      'variables' => array(
+      ],
+    ],
+    'status_report_grouped' => [
+      'variables' => [
         'grouped_requirements' => NULL,
         'requirements' => NULL,
-      ),
-    ),
-    'status_report_counter' => array(
-      'variables' => array('amount' => NULL, 'text' => NULL, 'severity' => NULL),
-    ),
-    'status_report_general_info' => array(
-      'variables' => array(
-        'drupal' => array(),
-        'cron' => array(),
-        'database_system' => array(),
-        'database_system_version' => array(),
-        'php' => array(),
-        'php_memory_limit' => array(),
-        'webserver' => array(),
-      ),
-    ),
-    'admin_page' => array(
-      'variables' => array('blocks' => NULL),
+      ],
+    ],
+    'status_report_counter' => [
+      'variables' => ['amount' => NULL, 'text' => NULL, 'severity' => NULL],
+    ],
+    'status_report_general_info' => [
+      'variables' => [
+        'drupal' => [],
+        'cron' => [],
+        'database_system' => [],
+        'database_system_version' => [],
+        'php' => [],
+        'php_memory_limit' => [],
+        'webserver' => [],
+      ],
+    ],
+    'admin_page' => [
+      'variables' => ['blocks' => NULL],
       'file' => 'system.admin.inc',
-    ),
-    'admin_block' => array(
-      'variables' => array('block' => NULL),
+    ],
+    'admin_block' => [
+      'variables' => ['block' => NULL],
       'file' => 'system.admin.inc',
-    ),
-    'admin_block_content' => array(
-      'variables' => array('content' => NULL),
+    ],
+    'admin_block_content' => [
+      'variables' => ['content' => NULL],
       'file' => 'system.admin.inc',
-    ),
-    'system_admin_index' => array(
-      'variables' => array('menu_items' => NULL),
+    ],
+    'system_admin_index' => [
+      'variables' => ['menu_items' => NULL],
       'file' => 'system.admin.inc',
-    ),
-    'entity_add_list' => array(
-      'variables' => array(
-        'bundles' => array(),
+    ],
+    'entity_add_list' => [
+      'variables' => [
+        'bundles' => [],
         'add_bundle_message' => NULL,
-      ),
+      ],
       'template' => 'entity-add-list',
-    ),
-  ));
+    ],
+  ]);
 }
 
 /**
  * Implements hook_hook_info().
  */
 function system_hook_info() {
-  $hooks['token_info'] = array(
+  $hooks['token_info'] = [
     'group' => 'tokens',
-  );
-  $hooks['token_info_alter'] = array(
+  ];
+  $hooks['token_info_alter'] = [
     'group' => 'tokens',
-  );
-  $hooks['tokens'] = array(
+  ];
+  $hooks['tokens'] = [
     'group' => 'tokens',
-  );
-  $hooks['tokens_alter'] = array(
+  ];
+  $hooks['tokens_alter'] = [
     'group' => 'tokens',
-  );
+  ];
 
   return $hooks;
 }
@@ -311,7 +311,7 @@ function system_theme_suggestions_page(array $variables) {
  * Implements hook_theme_suggestions_HOOK().
  */
 function system_theme_suggestions_maintenance_page(array $variables) {
-  $suggestions = array();
+  $suggestions = [];
 
   // Dead databases will show error messages so supplying this template will
   // allow themers to override the page and the content completely.
@@ -334,7 +334,7 @@ function system_theme_suggestions_maintenance_page(array $variables) {
  * Implements hook_theme_suggestions_HOOK().
  */
 function system_theme_suggestions_region(array $variables) {
-  $suggestions = array();
+  $suggestions = [];
   if (!empty($variables['elements']['#region'])) {
     $suggestions[] = 'region__' . $variables['elements']['#region'];
   }
@@ -345,7 +345,7 @@ function system_theme_suggestions_region(array $variables) {
  * Implements hook_theme_suggestions_HOOK().
  */
 function system_theme_suggestions_field(array $variables) {
-  $suggestions = array();
+  $suggestions = [];
   $element = $variables['element'];
 
   $suggestions[] = 'field__' . $element['#field_type'];
@@ -452,18 +452,18 @@ function template_preprocess_entity_add_list(&$variables) {
  * @return
  *   Nothing, this function just initializes variables in the user's session.
  */
-function system_authorized_init($callback, $file, $arguments = array(), $page_title = NULL) {
+function system_authorized_init($callback, $file, $arguments = [], $page_title = NULL) {
   // First, figure out what file transfer backends the site supports, and put
   // all of those in the SESSION so that authorize.php has access to all of
   // them via the class autoloader, even without a full bootstrap.
   $_SESSION['authorize_filetransfer_info'] = drupal_get_filetransfer_info();
 
   // Now, define the callback to invoke.
-  $_SESSION['authorize_operation'] = array(
+  $_SESSION['authorize_operation'] = [
     'callback' => $callback,
     'file' => $file,
     'arguments' => $arguments,
-  );
+  ];
 
   if (isset($page_title)) {
     $_SESSION['authorize_page_title'] = $page_title;
@@ -480,7 +480,7 @@ function system_authorized_init($callback, $file, $arguments = array(), $page_ti
  *
  * @see system_authorized_init()
  */
-function system_authorized_get_url(array $options = array()) {
+function system_authorized_get_url(array $options = []) {
   // core/authorize.php is an unrouted URL, so using the base: scheme is
   // the correct usage for this case.
   $url = Url::fromUri('base:core/authorize.php');
@@ -497,8 +497,8 @@ function system_authorized_get_url(array $options = array()) {
  *
  * @return \Drupal\Core\Url
  */
-function system_authorized_batch_processing_url(array $options = array()) {
-  $options['query'] = array('batch' => '1');
+function system_authorized_batch_processing_url(array $options = []) {
+  $options['query'] = ['batch' => '1'];
   return system_authorized_get_url($options);
 }
 
@@ -507,7 +507,7 @@ function system_authorized_batch_processing_url(array $options = array()) {
  *
  * @see system_authorized_init()
  */
-function system_authorized_run($callback, $file, $arguments = array(), $page_title = NULL) {
+function system_authorized_run($callback, $file, $arguments = [], $page_title = NULL) {
   system_authorized_init($callback, $file, $arguments, $page_title);
   return new RedirectResponse(system_authorized_get_url()->toString());
 }
@@ -531,43 +531,43 @@ function system_authorized_batch_process() {
  * Implements hook_updater_info().
  */
 function system_updater_info() {
-  return array(
-    'module' => array(
+  return [
+    'module' => [
       'class' => 'Drupal\Core\Updater\Module',
       'name' => t('Update modules'),
       'weight' => 0,
-    ),
-    'theme' => array(
+    ],
+    'theme' => [
       'class' => 'Drupal\Core\Updater\Theme',
       'name' => t('Update themes'),
       'weight' => 0,
-    ),
-  );
+    ],
+  ];
 }
 
 /**
  * Implements hook_filetransfer_info().
  */
 function system_filetransfer_info() {
-  $backends = array();
+  $backends = [];
 
   // This is the default, will be available on most systems.
   if (function_exists('ftp_connect')) {
-    $backends['ftp'] = array(
+    $backends['ftp'] = [
       'title' => t('FTP'),
       'class' => 'Drupal\Core\FileTransfer\FTP',
       'weight' => 0,
-    );
+    ];
   }
 
   // SSH2 lib connection is only available if the proper PHP extension is
   // installed.
   if (function_exists('ssh2_connect')) {
-    $backends['ssh'] = array(
+    $backends['ssh'] = [
       'title' => t('SSH'),
       'class' => 'Drupal\Core\FileTransfer\SSH',
       'weight' => 20,
-    );
+    ];
   }
   return $backends;
 }
@@ -595,61 +595,61 @@ function system_page_attachments(array &$page) {
   if (theme_get_setting('features.favicon')) {
     $favicon = theme_get_setting('favicon.url');
     $type = theme_get_setting('favicon.mimetype');
-    $page['#attached']['html_head_link'][][] = array(
+    $page['#attached']['html_head_link'][][] = [
       'rel' => 'shortcut icon',
       'href' => UrlHelper::stripDangerousProtocols($favicon),
       'type' => $type,
-    );
+    ];
   }
 
   // Get the major Drupal version.
   list($version, ) = explode('.', \Drupal::VERSION);
 
   // Attach default meta tags.
-  $meta_default = array(
+  $meta_default = [
     // Make sure the Content-Type comes first because the IE browser may be
     // vulnerable to XSS via encoding attacks from any content that comes
     // before this META tag, such as a TITLE tag.
-    'system_meta_content_type' => array(
+    'system_meta_content_type' => [
       '#tag' => 'meta',
-      '#attributes' => array(
+      '#attributes' => [
         'charset' => 'utf-8',
-      ),
+      ],
       // Security: This always has to be output first.
       '#weight' => -1000,
-    ),
+    ],
     // Show Drupal and the major version number in the META GENERATOR tag.
-    'system_meta_generator' => array(
+    'system_meta_generator' => [
       '#type' => 'html_tag',
       '#tag' => 'meta',
-      '#attributes' => array(
+      '#attributes' => [
         'name' => 'Generator',
         'content' => 'Drupal ' . $version . ' (https://www.drupal.org)',
-      ),
-    ),
+      ],
+    ],
     // Attach default mobile meta tags for responsive design.
-    'MobileOptimized' => array(
+    'MobileOptimized' => [
       '#tag' => 'meta',
-      '#attributes' => array(
+      '#attributes' => [
         'name' => 'MobileOptimized',
         'content' => 'width',
-      ),
-    ),
-    'HandheldFriendly' => array(
+      ],
+    ],
+    'HandheldFriendly' => [
       '#tag' => 'meta',
-      '#attributes' => array(
+      '#attributes' => [
         'name' => 'HandheldFriendly',
         'content' => 'true',
-      ),
-    ),
-    'viewport' => array(
+      ],
+    ],
+    'viewport' => [
       '#tag' => 'meta',
-      '#attributes' => array(
+      '#attributes' => [
         'name' => 'viewport',
         'content' => 'width=device-width, initial-scale=1.0',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
   foreach ($meta_default as $key => $value) {
     $page['#attached']['html_head'][] = [$value, $key];
   }
@@ -824,7 +824,7 @@ function system_user_login(UserInterface $account) {
   $config = \Drupal::config('system.date');
   // If the user has a NULL time zone, notify them to set a time zone.
   if (!$account->getTimezone() && $config->get('timezone.user.configurable') && $config->get('timezone.user.warn')) {
-    drupal_set_message(t('Configure your <a href=":user-edit">account time zone setting</a>.', array(':user-edit' => $account->url('edit-form', array('query' => \Drupal::destination()->getAsArray(), 'fragment' => 'edit-timezone')))));
+    drupal_set_message(t('Configure your <a href=":user-edit">account time zone setting</a>.', [':user-edit' => $account->url('edit-form', ['query' => \Drupal::destination()->getAsArray(), 'fragment' => 'edit-timezone'])]));
   }
 }
 
@@ -835,23 +835,23 @@ function system_user_timezone(&$form, FormStateInterface $form_state) {
   $user = \Drupal::currentUser();
 
   $account = $form_state->getFormObject()->getEntity();
-  $form['timezone'] = array(
+  $form['timezone'] = [
     '#type' => 'details',
     '#title' => t('Locale settings'),
     '#open' => TRUE,
     '#weight' => 6,
-  );
-  $form['timezone']['timezone'] = array(
+  ];
+  $form['timezone']['timezone'] = [
     '#type' => 'select',
     '#title' => t('Time zone'),
     '#default_value' => $account->getTimezone() ? $account->getTimezone() : \Drupal::config('system.date')->get('timezone.default'),
     '#options' => system_time_zones($account->id() != $user->id()),
     '#description' => t('Select the desired local time and time zone. Dates and times throughout this site will be displayed using this time zone.'),
-  );
+  ];
   $user_input = $form_state->getUserInput();
   if (!$account->getTimezone() && $account->id() == $user->id() && empty($user_input['timezone'])) {
     $form['timezone']['#attached']['library'][] = 'core/drupal.timezone';
-    $form['timezone']['timezone']['#attributes'] = array('class' => array('timezone-detect'));
+    $form['timezone']['timezone']['#attributes'] = ['class' => ['timezone-detect']];
   }
 }
 
@@ -903,14 +903,14 @@ function system_check_directory($form_element, FormStateInterface $form_state) {
   $logger = \Drupal::logger('file system');
   if (!is_dir($directory) && !drupal_mkdir($directory, NULL, TRUE)) {
     // If the directory does not exists and cannot be created.
-    $form_state->setErrorByName($form_element['#parents'][0], t('The directory %directory does not exist and could not be created.', array('%directory' => $directory)));
-    $logger->error('The directory %directory does not exist and could not be created.', array('%directory' => $directory));
+    $form_state->setErrorByName($form_element['#parents'][0], t('The directory %directory does not exist and could not be created.', ['%directory' => $directory]));
+    $logger->error('The directory %directory does not exist and could not be created.', ['%directory' => $directory]);
   }
 
   if (is_dir($directory) && !is_writable($directory) && !drupal_chmod($directory)) {
     // If the directory is not writable and cannot be made so.
-    $form_state->setErrorByName($form_element['#parents'][0], t('The directory %directory exists but is not writable and could not be made writable.', array('%directory' => $directory)));
-    $logger->error('The directory %directory exists but is not writable and could not be made writable.', array('%directory' => $directory));
+    $form_state->setErrorByName($form_element['#parents'][0], t('The directory %directory exists but is not writable and could not be made writable.', ['%directory' => $directory]));
+    $logger->error('The directory %directory exists but is not writable and could not be made writable.', ['%directory' => $directory]);
   }
   elseif (is_dir($directory)) {
     if ($form_element['#name'] == 'file_public_path') {
@@ -971,7 +971,7 @@ function system_get_info($type, $name = NULL) {
     }
   }
   else {
-    $info = array();
+    $info = [];
     $list = system_list($type);
     foreach ($list as $shortname => $item) {
       if (!empty($item->status)) {
@@ -980,7 +980,7 @@ function system_get_info($type, $name = NULL) {
     }
   }
   if (isset($name)) {
-    return isset($info[$name]) ? $info[$name] : array();
+    return isset($info[$name]) ? $info[$name] : [];
   }
   return $info;
 }
@@ -1017,13 +1017,13 @@ function _system_rebuild_module_data() {
   }
 
   // Set defaults for module info.
-  $defaults = array(
-    'dependencies' => array(),
+  $defaults = [
+    'dependencies' => [],
     'description' => '',
     'package' => 'Other',
     'version' => NULL,
     'php' => DRUPAL_MINIMUM_PHP,
-  );
+  ];
 
   // Read info files for each module.
   foreach ($modules as $key => $module) {
@@ -1085,7 +1085,7 @@ function _system_rebuild_module_data_ensure_required($module, &$modules) {
       $dependency_name = ModuleHandler::parseDependency($dependency)['name'];
       if (!isset($modules[$dependency_name]->info['required'])) {
         $modules[$dependency_name]->info['required'] = TRUE;
-        $modules[$dependency_name]->info['explanation'] = t('Dependency of required module @module', array('@module' => $module->info['name']));
+        $modules[$dependency_name]->info['explanation'] = t('Dependency of required module @module', ['@module' => $module->info['name']]);
         // Ensure any dependencies it has are required.
         _system_rebuild_module_data_ensure_required($modules[$dependency_name], $modules);
       }
@@ -1106,10 +1106,10 @@ function system_rebuild_module_data() {
   // reference from system_list_reset() during the rebuild.
   if (!isset($modules_cache)) {
     $modules = _system_rebuild_module_data();
-    $files = array();
+    $files = [];
     ksort($modules);
     // Add status, weight, and schema version.
-    $installed_modules = \Drupal::config('core.extension')->get('module') ?: array();
+    $installed_modules = \Drupal::config('core.extension')->get('module') ?: [];
     foreach ($modules as $name => $module) {
       $module->weight = isset($installed_modules[$name]) ? $installed_modules[$name] : 0;
       $module->status = (int) isset($installed_modules[$name]);
@@ -1144,11 +1144,11 @@ function system_region_list($theme, $show = REGIONS_ALL) {
   if (!$theme instanceof Extension) {
     $themes = \Drupal::service('theme_handler')->listInfo();
     if (!isset($themes[$theme])) {
-      return array();
+      return [];
     }
     $theme = $themes[$theme];
   }
-  $list = array();
+  $list = [];
   $info = $theme->info;
   // If requested, suppress hidden regions. See block_admin_display_form().
   foreach ($info['regions'] as $name => $label) {
@@ -1253,15 +1253,15 @@ function system_get_module_admin_tasks($module, array $info) {
     $parameters = new MenuTreeParameters();
     $parameters->setRoot('system.admin')->excludeRoot()->onlyEnabledLinks();
     $tree = $menu_tree->load('system.admin', $parameters);
-    $manipulators = array(
-      array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-      array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
-      array('callable' => 'menu.default_tree_manipulators:flatten'),
-    );
+    $manipulators = [
+      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+      ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+      ['callable' => 'menu.default_tree_manipulators:flatten'],
+    ];
     $tree = $menu_tree->transform($tree, $manipulators);
   }
 
-  $admin_tasks = array();
+  $admin_tasks = [];
   foreach ($tree as $element) {
     if (!$element->access->isAllowed()) {
       // @todo Bubble cacheability metadata of both accessible and inaccessible
@@ -1273,11 +1273,11 @@ function system_get_module_admin_tasks($module, array $info) {
     if ($link->getProvider() != $module) {
       continue;
     }
-    $admin_tasks[] = array(
+    $admin_tasks[] = [
       'title' => $link->getTitle(),
       'description' => $link->getDescription(),
       'url' => $link->getUrlObject(),
-    );
+    ];
   }
 
   // Append link for permissions.
@@ -1287,15 +1287,15 @@ function system_get_module_admin_tasks($module, array $info) {
   if ($permission_handler->moduleProvidesPermissions($module)) {
     /** @var \Drupal\Core\Access\AccessManagerInterface $access_manager */
     $access_manager = \Drupal::service('access_manager');
-    if ($access_manager->checkNamedRoute('user.admin_permissions', array(), \Drupal::currentUser())) {
+    if ($access_manager->checkNamedRoute('user.admin_permissions', [], \Drupal::currentUser())) {
       /** @var \Drupal\Core\Url $url */
       $url = new Url('user.admin_permissions');
       $url->setOption('fragment', 'module-' . $module);
-      $admin_tasks["user.admin_permissions.$module"] = array(
-        'title' => t('Configure @module permissions', array('@module' => $info['name'])),
+      $admin_tasks["user.admin_permissions.$module"] = [
+        'title' => t('Configure @module permissions', ['@module' => $info['name']]),
         'description' => '',
         'url' => $url,
-      );
+      ];
     }
   }
 
@@ -1348,7 +1348,7 @@ function system_mail($key, &$message, $params) {
   $subject = PlainTextOutput::renderFromHtml($token_service->replace($context['subject'], $context));
   $body = $token_service->replace($context['message'], $context);
 
-  $message['subject'] .= str_replace(array("\r", "\n"), '', $subject);
+  $message['subject'] .= str_replace(["\r", "\n"], '', $subject);
   $message['body'][] = $body;
 }
 
@@ -1360,13 +1360,13 @@ function system_mail($key, &$message, $params) {
  */
 function system_time_zones($blank = NULL) {
   $zonelist = timezone_identifiers_list();
-  $zones = $blank ? array('' => t('- None selected -')) : array();
+  $zones = $blank ? ['' => t('- None selected -')] : [];
   foreach ($zonelist as $zone) {
     // Because many time zones exist in PHP only for backward compatibility
     // reasons and should not be used, the list is filtered by a regular
     // expression.
     if (preg_match('!^((Africa|America|Antarctica|Arctic|Asia|Atlantic|Australia|Europe|Indian|Pacific)/|UTC$)!', $zone)) {
-      $zones[$zone] = t('@zone', array('@zone' => t(str_replace('_', ' ', $zone))));
+      $zones[$zone] = t('@zone', ['@zone' => t(str_replace('_', ' ', $zone))]);
     }
   }
   // Sort the translated time zones alphabetically.
@@ -1425,11 +1425,11 @@ function system_retrieve_file($url, $destination = NULL, $managed = FALSE, $repl
     $local = $managed ? file_save_data($data, $path, $replace) : file_unmanaged_save_data($data, $path, $replace);
   }
   catch (RequestException $exception) {
-    drupal_set_message(t('Failed to fetch file due to error "%error"', array('%error' => $exception->getMessage())), 'error');
+    drupal_set_message(t('Failed to fetch file due to error "%error"', ['%error' => $exception->getMessage()]), 'error');
     return FALSE;
   }
   if (!$local) {
-    drupal_set_message(t('@remote could not be saved to @path.', array('@remote' => $url, '@path' => $path)), 'error');
+    drupal_set_message(t('@remote could not be saved to @path.', ['@remote' => $url, '@path' => $path]), 'error');
   }
 
   return $local;
diff --git a/core/modules/system/system.tokens.inc b/core/modules/system/system.tokens.inc
index 66b5c7faf3f0bc2513c97205854091b982fb99fc..55c89ae9f92e379649abc32db21cb069e3f0f96a 100644
--- a/core/modules/system/system.tokens.inc
+++ b/core/modules/system/system.tokens.inc
@@ -14,74 +14,74 @@
  * Implements hook_token_info().
  */
 function system_token_info() {
-  $types['site'] = array(
+  $types['site'] = [
     'name' => t("Site information"),
     'description' => t("Tokens for site-wide settings and other global information."),
-  );
-  $types['date'] = array(
+  ];
+  $types['date'] = [
     'name' => t("Dates"),
     'description' => t("Tokens related to times and dates."),
-  );
+  ];
 
   // Site-wide global tokens.
-  $site['name'] = array(
+  $site['name'] = [
     'name' => t("Name"),
     'description' => t("The name of the site."),
-  );
-  $site['slogan'] = array(
+  ];
+  $site['slogan'] = [
     'name' => t("Slogan"),
     'description' => t("The slogan of the site."),
-  );
-  $site['mail'] = array(
+  ];
+  $site['mail'] = [
     'name' => t("Email"),
     'description' => t("The administrative email address for the site."),
-  );
-  $site['url'] = array(
+  ];
+  $site['url'] = [
     'name' => t("URL"),
     'description' => t("The URL of the site's front page."),
-  );
-  $site['url-brief'] = array(
+  ];
+  $site['url-brief'] = [
     'name' => t("URL (brief)"),
     'description' => t("The URL of the site's front page without the protocol."),
-  );
-  $site['login-url'] = array(
+  ];
+  $site['login-url'] = [
     'name' => t("Login page"),
     'description' => t("The URL of the site's login page."),
-  );
+  ];
 
   // Date related tokens.
-  $date['short'] = array(
+  $date['short'] = [
     'name' => t("Short format"),
-    'description' => t("A date in 'short' format. (%date)", array('%date' => format_date(REQUEST_TIME, 'short'))),
-  );
-  $date['medium'] = array(
+    'description' => t("A date in 'short' format. (%date)", ['%date' => format_date(REQUEST_TIME, 'short')]),
+  ];
+  $date['medium'] = [
     'name' => t("Medium format"),
-    'description' => t("A date in 'medium' format. (%date)", array('%date' => format_date(REQUEST_TIME, 'medium'))),
-  );
-  $date['long'] = array(
+    'description' => t("A date in 'medium' format. (%date)", ['%date' => format_date(REQUEST_TIME, 'medium')]),
+  ];
+  $date['long'] = [
     'name' => t("Long format"),
-    'description' => t("A date in 'long' format. (%date)", array('%date' => format_date(REQUEST_TIME, 'long'))),
-  );
-  $date['custom'] = array(
+    'description' => t("A date in 'long' format. (%date)", ['%date' => format_date(REQUEST_TIME, 'long')]),
+  ];
+  $date['custom'] = [
     'name' => t("Custom format"),
     'description' => t('A date in a custom format. See <a href="http://php.net/manual/function.date.php">the PHP documentation</a> for details.'),
-  );
-  $date['since'] = array(
+  ];
+  $date['since'] = [
     'name' => t("Time-since"),
-    'description' => t("A date in 'time-since' format. (%date)", array('%date' => \Drupal::service('date.formatter')->formatTimeDiffSince(REQUEST_TIME - 360))),
-  );
-  $date['raw'] = array(
+    'description' => t("A date in 'time-since' format. (%date)", ['%date' => \Drupal::service('date.formatter')->formatTimeDiffSince(REQUEST_TIME - 360)]),
+  ];
+  $date['raw'] = [
     'name' => t("Raw timestamp"),
-    'description' => t("A date in UNIX timestamp format (%date)", array('%date' => REQUEST_TIME)),
-  );
+    'description' => t("A date in UNIX timestamp format (%date)", ['%date' => REQUEST_TIME]),
+  ];
 
-  return array(
+  return [
     'types' => $types,
-    'tokens' => array(
+    'tokens' => [
       'site' => $site,
       'date' => $date,
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -90,7 +90,7 @@ function system_token_info() {
 function system_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
   $token_service = \Drupal::token();
 
-  $url_options = array('absolute' => TRUE);
+  $url_options = ['absolute' => TRUE];
   if (isset($options['langcode'])) {
     $url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
     $langcode = $options['langcode'];
@@ -98,7 +98,7 @@ function system_tokens($type, $tokens, array $data, array $options, BubbleableMe
   else {
     $langcode = NULL;
   }
-  $replacements = array();
+  $replacements = [];
 
   if ($type == 'site') {
     foreach ($tokens as $name => $original) {
@@ -129,16 +129,16 @@ function system_tokens($type, $tokens, array $data, array $options, BubbleableMe
 
         case 'url':
           /** @var \Drupal\Core\GeneratedUrl $result */
-          $result = \Drupal::url('<front>', array(), $url_options, TRUE);
+          $result = \Drupal::url('<front>', [], $url_options, TRUE);
           $bubbleable_metadata->addCacheableDependency($result);
           $replacements[$original] = $result->getGeneratedUrl();
           break;
 
         case 'url-brief':
           /** @var \Drupal\Core\GeneratedUrl $result */
-          $result = \Drupal::url('<front>', array(), $url_options, TRUE);
+          $result = \Drupal::url('<front>', [], $url_options, TRUE);
           $bubbleable_metadata->addCacheableDependency($result);
-          $replacements[$original] = preg_replace(array('!^https?://!', '!/$!'), '', $result->getGeneratedUrl());
+          $replacements[$original] = preg_replace(['!^https?://!', '!/$!'], '', $result->getGeneratedUrl());
           break;
 
         case 'login-url':
@@ -173,7 +173,7 @@ function system_tokens($type, $tokens, array $data, array $options, BubbleableMe
           break;
 
         case 'since':
-          $replacements[$original] = \Drupal::service('date.formatter')->formatTimeDiffSince($date, array('langcode' => $langcode));
+          $replacements[$original] = \Drupal::service('date.formatter')->formatTimeDiffSince($date, ['langcode' => $langcode]);
           $bubbleable_metadata->setCacheMaxAge(0);
           break;
 
diff --git a/core/modules/system/tests/fixtures/update/drupal-8.block-context-manager-2354889.php b/core/modules/system/tests/fixtures/update/drupal-8.block-context-manager-2354889.php
index 7f23f9026643e01cad1a38703ebe57de63d12a49..cb35676899473f7eabb67ddc5f9a3019ddb3b335 100644
--- a/core/modules/system/tests/fixtures/update/drupal-8.block-context-manager-2354889.php
+++ b/core/modules/system/tests/fixtures/update/drupal-8.block-context-manager-2354889.php
@@ -23,16 +23,16 @@
 
 foreach ($block_configs as $block_config) {
   $connection->insert('config')
-    ->fields(array(
+    ->fields([
       'collection',
       'name',
       'data',
-    ))
-    ->values(array(
+    ])
+    ->values([
       'collection' => '',
       'name' => 'block.block.' . $block_config['id'],
       'data' => serialize($block_config),
-    ))
+    ])
     ->execute();
 }
 
diff --git a/core/modules/system/tests/fixtures/update/drupal-8.field-schema-data-uninstall-2573667.php b/core/modules/system/tests/fixtures/update/drupal-8.field-schema-data-uninstall-2573667.php
index a511cb5477cb6884a976ea8c4e7e07a7ba9a21bf..e3531a0c12d568acab7da55be77dfa71e8141b9f 100644
--- a/core/modules/system/tests/fixtures/update/drupal-8.field-schema-data-uninstall-2573667.php
+++ b/core/modules/system/tests/fixtures/update/drupal-8.field-schema-data-uninstall-2573667.php
@@ -11,64 +11,64 @@
 $connection = Database::getConnection();
 
 $connection->insert('key_value')
-  ->fields(array(
+  ->fields([
     'collection',
     'name',
     'value',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.body',
     'value' => 'a:2:{s:19:"block_content__body";a:4:{s:11:"description";s:42:"Data storage for block_content field body.";s:6:"fields";a:9:{s:6:"bundle";a:5:{s:4:"type";s:13:"varchar_ascii";s:6:"length";i:128;s:8:"not null";b:1;s:7:"default";s:0:"";s:11:"description";s:88:"The field instance bundle to which this row belongs, used when deleting a field instance";}s:7:"deleted";a:5:{s:4:"type";s:3:"int";s:4:"size";s:4:"tiny";s:8:"not null";b:1;s:7:"default";i:0;s:11:"description";s:60:"A boolean indicating whether this data item has been deleted";}s:9:"entity_id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:8:"not null";b:1;s:11:"description";s:38:"The entity id this data is attached to";}s:11:"revision_id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:8:"not null";b:1;s:11:"description";s:47:"The entity revision id this data is attached to";}s:8:"langcode";a:5:{s:4:"type";s:13:"varchar_ascii";s:6:"length";i:32;s:8:"not null";b:1;s:7:"default";s:0:"";s:11:"description";s:37:"The language code for this data item.";}s:5:"delta";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:8:"not null";b:1;s:11:"description";s:67:"The sequence number for this data item, used for multi-value fields";}s:10:"body_value";a:3:{s:4:"type";s:4:"text";s:4:"size";s:3:"big";s:8:"not null";b:1;}s:12:"body_summary";a:3:{s:4:"type";s:4:"text";s:4:"size";s:3:"big";s:8:"not null";b:0;}s:11:"body_format";a:3:{s:4:"type";s:13:"varchar_ascii";s:6:"length";i:255;s:8:"not null";b:0;}}s:11:"primary key";a:4:{i:0;s:9:"entity_id";i:1;s:7:"deleted";i:2;s:5:"delta";i:3;s:8:"langcode";}s:7:"indexes";a:3:{s:6:"bundle";a:1:{i:0;s:6:"bundle";}s:11:"revision_id";a:1:{i:0;s:11:"revision_id";}s:11:"body_format";a:1:{i:0;s:11:"body_format";}}}s:28:"block_content_revision__body";a:4:{s:11:"description";s:54:"Revision archive storage for block_content field body.";s:6:"fields";a:9:{s:6:"bundle";a:5:{s:4:"type";s:13:"varchar_ascii";s:6:"length";i:128;s:8:"not null";b:1;s:7:"default";s:0:"";s:11:"description";s:88:"The field instance bundle to which this row belongs, used when deleting a field instance";}s:7:"deleted";a:5:{s:4:"type";s:3:"int";s:4:"size";s:4:"tiny";s:8:"not null";b:1;s:7:"default";i:0;s:11:"description";s:60:"A boolean indicating whether this data item has been deleted";}s:9:"entity_id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:8:"not null";b:1;s:11:"description";s:38:"The entity id this data is attached to";}s:11:"revision_id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:8:"not null";b:1;s:11:"description";s:47:"The entity revision id this data is attached to";}s:8:"langcode";a:5:{s:4:"type";s:13:"varchar_ascii";s:6:"length";i:32;s:8:"not null";b:1;s:7:"default";s:0:"";s:11:"description";s:37:"The language code for this data item.";}s:5:"delta";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:8:"not null";b:1;s:11:"description";s:67:"The sequence number for this data item, used for multi-value fields";}s:10:"body_value";a:3:{s:4:"type";s:4:"text";s:4:"size";s:3:"big";s:8:"not null";b:1;}s:12:"body_summary";a:3:{s:4:"type";s:4:"text";s:4:"size";s:3:"big";s:8:"not null";b:0;}s:11:"body_format";a:3:{s:4:"type";s:13:"varchar_ascii";s:6:"length";i:255;s:8:"not null";b:0;}}s:11:"primary key";a:5:{i:0;s:9:"entity_id";i:1;s:11:"revision_id";i:2;s:7:"deleted";i:3;s:5:"delta";i:4;s:8:"langcode";}s:7:"indexes";a:3:{s:6:"bundle";a:1:{i:0;s:6:"bundle";}s:11:"revision_id";a:1:{i:0;s:11:"revision_id";}s:11:"body_format";a:1:{i:0;s:11:"body_format";}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.changed',
     'value' => 'a:2:{s:24:"block_content_field_data";a:1:{s:6:"fields";a:1:{s:7:"changed";a:2:{s:4:"type";s:3:"int";s:8:"not null";b:0;}}}s:28:"block_content_field_revision";a:1:{s:6:"fields";a:1:{s:7:"changed";a:2:{s:4:"type";s:3:"int";s:8:"not null";b:0;}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.default_langcode',
     'value' => 'a:2:{s:24:"block_content_field_data";a:1:{s:6:"fields";a:1:{s:16:"default_langcode";a:3:{s:4:"type";s:3:"int";s:4:"size";s:4:"tiny";s:8:"not null";b:1;}}}s:28:"block_content_field_revision";a:1:{s:6:"fields";a:1:{s:16:"default_langcode";a:3:{s:4:"type";s:3:"int";s:4:"size";s:4:"tiny";s:8:"not null";b:1;}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.id',
     'value' => 'a:4:{s:13:"block_content";a:1:{s:6:"fields";a:1:{s:2:"id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:4:"size";s:6:"normal";s:8:"not null";b:1;}}}s:24:"block_content_field_data";a:1:{s:6:"fields";a:1:{s:2:"id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:4:"size";s:6:"normal";s:8:"not null";b:1;}}}s:22:"block_content_revision";a:1:{s:6:"fields";a:1:{s:2:"id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:4:"size";s:6:"normal";s:8:"not null";b:1;}}}s:28:"block_content_field_revision";a:1:{s:6:"fields";a:1:{s:2:"id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:4:"size";s:6:"normal";s:8:"not null";b:1;}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.info',
     'value' => 'a:2:{s:24:"block_content_field_data";a:1:{s:6:"fields";a:1:{s:4:"info";a:4:{s:4:"type";s:7:"varchar";s:6:"length";i:255;s:6:"binary";b:0;s:8:"not null";b:0;}}}s:28:"block_content_field_revision";a:1:{s:6:"fields";a:1:{s:4:"info";a:4:{s:4:"type";s:7:"varchar";s:6:"length";i:255;s:6:"binary";b:0;s:8:"not null";b:0;}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.langcode',
     'value' => 'a:4:{s:13:"block_content";a:1:{s:6:"fields";a:1:{s:8:"langcode";a:4:{s:4:"type";s:7:"varchar";s:6:"length";i:12;s:8:"is_ascii";b:1;s:8:"not null";b:1;}}}s:24:"block_content_field_data";a:1:{s:6:"fields";a:1:{s:8:"langcode";a:4:{s:4:"type";s:7:"varchar";s:6:"length";i:12;s:8:"is_ascii";b:1;s:8:"not null";b:1;}}}s:22:"block_content_revision";a:1:{s:6:"fields";a:1:{s:8:"langcode";a:4:{s:4:"type";s:7:"varchar";s:6:"length";i:12;s:8:"is_ascii";b:1;s:8:"not null";b:1;}}}s:28:"block_content_field_revision";a:1:{s:6:"fields";a:1:{s:8:"langcode";a:4:{s:4:"type";s:7:"varchar";s:6:"length";i:12;s:8:"is_ascii";b:1;s:8:"not null";b:1;}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.revision_id',
     'value' => 'a:4:{s:13:"block_content";a:1:{s:6:"fields";a:1:{s:11:"revision_id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:4:"size";s:6:"normal";s:8:"not null";b:0;}}}s:24:"block_content_field_data";a:1:{s:6:"fields";a:1:{s:11:"revision_id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:4:"size";s:6:"normal";s:8:"not null";b:1;}}}s:22:"block_content_revision";a:1:{s:6:"fields";a:1:{s:11:"revision_id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:4:"size";s:6:"normal";s:8:"not null";b:1;}}}s:28:"block_content_field_revision";a:1:{s:6:"fields";a:1:{s:11:"revision_id";a:4:{s:4:"type";s:3:"int";s:8:"unsigned";b:1;s:4:"size";s:6:"normal";s:8:"not null";b:1;}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.revision_log',
     'value' => 'a:1:{s:22:"block_content_revision";a:1:{s:6:"fields";a:1:{s:12:"revision_log";a:3:{s:4:"type";s:4:"text";s:4:"size";s:3:"big";s:8:"not null";b:0;}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.revision_translation_affected',
     'value' => 'a:2:{s:24:"block_content_field_data";a:1:{s:6:"fields";a:1:{s:29:"revision_translation_affected";a:3:{s:4:"type";s:3:"int";s:4:"size";s:4:"tiny";s:8:"not null";b:0;}}}s:28:"block_content_field_revision";a:1:{s:6:"fields";a:1:{s:29:"revision_translation_affected";a:3:{s:4:"type";s:3:"int";s:4:"size";s:4:"tiny";s:8:"not null";b:0;}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.type',
     'value' => 'a:2:{s:13:"block_content";a:2:{s:6:"fields";a:1:{s:4:"type";a:4:{s:11:"description";s:28:"The ID of the target entity.";s:4:"type";s:13:"varchar_ascii";s:6:"length";i:32;s:8:"not null";b:1;}}s:7:"indexes";a:1:{s:36:"block_content_field__type__target_id";a:1:{i:0;s:4:"type";}}}s:24:"block_content_field_data";a:2:{s:6:"fields";a:1:{s:4:"type";a:4:{s:11:"description";s:28:"The ID of the target entity.";s:4:"type";s:13:"varchar_ascii";s:6:"length";i:32;s:8:"not null";b:1;}}s:7:"indexes";a:1:{s:36:"block_content_field__type__target_id";a:1:{i:0;s:4:"type";}}}}',
-  ))
-  ->values(array(
+  ])
+  ->values([
     'collection' => 'entity.storage_schema.sql',
     'name' => 'block_content.field_schema_data.uuid',
     'value' => 'a:1:{s:13:"block_content";a:2:{s:6:"fields";a:1:{s:4:"uuid";a:4:{s:4:"type";s:13:"varchar_ascii";s:6:"length";i:128;s:6:"binary";b:0;s:8:"not null";b:1;}}s:11:"unique keys";a:1:{s:32:"block_content_field__uuid__value";a:1:{i:0;s:4:"uuid";}}}}',
-  ))
+  ])
   ->execute();
diff --git a/core/modules/system/tests/fixtures/update/drupal-8.update-test-block-disabled-2513534.php b/core/modules/system/tests/fixtures/update/drupal-8.update-test-block-disabled-2513534.php
index fc8e1c5612da5dcf5c61745ec59adb834a9e0ca7..fa394473d731f741e108fc2820994987fdbc4a11 100644
--- a/core/modules/system/tests/fixtures/update/drupal-8.update-test-block-disabled-2513534.php
+++ b/core/modules/system/tests/fixtures/update/drupal-8.update-test-block-disabled-2513534.php
@@ -19,16 +19,16 @@
 
 foreach ($block_configs as $block_config) {
   $connection->insert('config')
-    ->fields(array(
+    ->fields([
       'collection',
       'name',
       'data',
-    ))
-    ->values(array(
+    ])
+    ->values([
       'collection' => '',
       'name' => 'block.block.' . $block_config['id'],
       'data' => serialize($block_config),
-    ))
+    ])
     ->execute();
 }
 
diff --git a/core/modules/system/tests/fixtures/update/drupal-8.update-test-schema-enabled.php b/core/modules/system/tests/fixtures/update/drupal-8.update-test-schema-enabled.php
index 7250741cf805e5c0aed7eac62bc2ca37b1506921..93592ecef21d8465103fde6f97a39cd73d5466e8 100644
--- a/core/modules/system/tests/fixtures/update/drupal-8.update-test-schema-enabled.php
+++ b/core/modules/system/tests/fixtures/update/drupal-8.update-test-schema-enabled.php
@@ -10,20 +10,20 @@
 $connection = Database::getConnection();
 
 // Create the table.
-$connection->schema()->createTable('update_test_schema_table', array(
-  'fields' => array(
-    'a' => array(
+$connection->schema()->createTable('update_test_schema_table', [
+  'fields' => [
+    'a' => [
       'type' => 'int',
       'not null' => TRUE,
       'size' => 'normal',
-    ),
-    'b' => array(
+    ],
+    'b' => [
       'type' => 'blob',
       'not null' => FALSE,
       'size' => 'normal',
-    ),
-  ),
-));
+    ],
+  ],
+]);
 
 // Set the schema version.
 $connection->merge('key_value')
diff --git a/core/modules/system/tests/fixtures/update/drupal-8.views-entity-views-data-2455125.php b/core/modules/system/tests/fixtures/update/drupal-8.views-entity-views-data-2455125.php
index 2fcda10af17ba2fb24653d2603736c61270833e1..7b04a3693c63f4d3a1da9f724ff4296853efa406 100644
--- a/core/modules/system/tests/fixtures/update/drupal-8.views-entity-views-data-2455125.php
+++ b/core/modules/system/tests/fixtures/update/drupal-8.views-entity-views-data-2455125.php
@@ -18,15 +18,15 @@
 
 foreach ($views_configs as $views_config) {
   $connection->insert('config')
-    ->fields(array(
+    ->fields([
       'collection',
       'name',
       'data',
-    ))
-    ->values(array(
+    ])
+    ->values([
       'collection' => '',
       'name' => 'views.view.' . $views_config['id'],
       'data' => serialize($views_config),
-    ))
+    ])
     ->execute();
 }
diff --git a/core/modules/system/tests/fixtures/update/drupal-8.views-revision-metadata-fields-2248983.php b/core/modules/system/tests/fixtures/update/drupal-8.views-revision-metadata-fields-2248983.php
index 59b05a5d6af80fa99cb949740cf4d3731bc96391..4cc5227774f6a75fefbca3b838ea792fcc0c0d7f 100644
--- a/core/modules/system/tests/fixtures/update/drupal-8.views-revision-metadata-fields-2248983.php
+++ b/core/modules/system/tests/fixtures/update/drupal-8.views-revision-metadata-fields-2248983.php
@@ -21,15 +21,15 @@
 
 foreach ($views_configs as $views_config) {
   $connection->insert('config')
-    ->fields(array(
+    ->fields([
       'collection',
       'name',
       'data',
-    ))
-    ->values(array(
+    ])
+    ->values([
       'collection' => '',
       'name' => 'views.view.' . $views_config['id'],
       'data' => serialize($views_config),
-    ))
+    ])
     ->execute();
 }
diff --git a/core/modules/system/tests/modules/accept_header_routing_test/src/Routing/AcceptHeaderMatcher.php b/core/modules/system/tests/modules/accept_header_routing_test/src/Routing/AcceptHeaderMatcher.php
index 0981f46ea47f6b933b0a0cf6f6a10d0d251a1736..1a3c61eafb673cad6fbb2e13efb80cc5cb1d899c 100644
--- a/core/modules/system/tests/modules/accept_header_routing_test/src/Routing/AcceptHeaderMatcher.php
+++ b/core/modules/system/tests/modules/accept_header_routing_test/src/Routing/AcceptHeaderMatcher.php
@@ -20,7 +20,7 @@ public function filter(RouteCollection $collection, Request $request) {
     // Generates a list of Symfony formats matching the acceptable MIME types.
     // @todo replace by proper content negotiation library.
     $acceptable_mime_types = $request->getAcceptableContentTypes();
-    $acceptable_formats = array_filter(array_map(array($request, 'getFormat'), $acceptable_mime_types));
+    $acceptable_formats = array_filter(array_map([$request, 'getFormat'], $acceptable_mime_types));
     $primary_format = $request->getRequestFormat();
 
     foreach ($collection as $name => $route) {
diff --git a/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module b/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module
index ecde048bc51be0607bbc788856f3a30d605aa4be..262572be9a7d980500cbf099d93b2bd1b8a9e736 100644
--- a/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module
+++ b/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module
@@ -89,7 +89,7 @@ function ajax_forms_test_advanced_commands_css_callback($form, FormStateInterfac
   $color = 'blue';
 
   $response = new AjaxResponse();
-  $response->addCommand(new CssCommand($selector, array('background-color' => $color)));
+  $response->addCommand(new CssCommand($selector, ['background-color' => $color]));
   return $response;
 }
 
@@ -108,7 +108,7 @@ function ajax_forms_test_advanced_commands_data_callback($form, FormStateInterfa
  */
 function ajax_forms_test_advanced_commands_invoke_callback($form, FormStateInterface $form_state) {
   $response = new AjaxResponse();
-  $response->addCommand(new InvokeCommand('#invoke_div', 'addClass', array('error')));
+  $response->addCommand(new InvokeCommand('#invoke_div', 'addClass', ['error']));
   return $response;
 }
 
@@ -181,7 +181,7 @@ function ajax_forms_test_advanced_commands_add_css_callback($form, FormStateInte
  */
 function ajax_forms_test_validation_form_callback($form, FormStateInterface $form_state) {
   drupal_set_message("ajax_forms_test_validation_form_callback invoked");
-  drupal_set_message(t("Callback: drivertext=%drivertext, spare_required_field=%spare_required_field", array('%drivertext' => $form_state->getValue('drivertext'), '%spare_required_field' => $form_state->getValue('spare_required_field'))));
+  drupal_set_message(t("Callback: drivertext=%drivertext, spare_required_field=%spare_required_field", ['%drivertext' => $form_state->getValue('drivertext'), '%spare_required_field' => $form_state->getValue('spare_required_field')]));
   return ['#markup' => '<div id="message_area">ajax_forms_test_validation_form_callback at ' . date('c') . '</div>'];
 }
 
@@ -190,7 +190,7 @@ function ajax_forms_test_validation_form_callback($form, FormStateInterface $for
  */
 function ajax_forms_test_validation_number_form_callback($form, FormStateInterface $form_state) {
   drupal_set_message("ajax_forms_test_validation_number_form_callback invoked");
-  drupal_set_message(t("Callback: drivernumber=%drivernumber, spare_required_field=%spare_required_field", array('%drivernumber' => $form_state->getValue('drivernumber'), '%spare_required_field' => $form_state->getValue('spare_required_field'))));
+  drupal_set_message(t("Callback: drivernumber=%drivernumber, spare_required_field=%spare_required_field", ['%drivernumber' => $form_state->getValue('drivernumber'), '%spare_required_field' => $form_state->getValue('spare_required_field')]));
   return ['#markup' => '<div id="message_area_number">ajax_forms_test_validation_number_form_callback at ' . date('c') . '</div>'];
 }
 
diff --git a/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestCommandsForm.php b/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestCommandsForm.php
index d04b21703dffbbaa7cd6533414fbd15a82d32eea..e3c09af92cd189182712764d39e21838a62f37ca 100644
--- a/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestCommandsForm.php
+++ b/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestCommandsForm.php
@@ -21,178 +21,178 @@ public function getFormId() {
    * {@inheritdoc}.
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form = array();
+    $form = [];
 
     // Shows the 'after' command with a callback generating commands.
-    $form['after_command_example'] = array(
+    $form['after_command_example'] = [
       '#value' => $this->t("AJAX 'After': Click to put something after the div"),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_after_callback',
-      ),
+      ],
       '#suffix' => '<div id="after_div">Something can be inserted after this</div>',
-    );
+    ];
 
     // Shows the 'alert' command.
-    $form['alert_command_example'] = array(
+    $form['alert_command_example'] = [
       '#value' => $this->t("AJAX 'Alert': Click to alert"),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_alert_callback',
-      ),
-    );
+      ],
+    ];
 
     // Shows the 'append' command.
-    $form['append_command_example'] = array(
+    $form['append_command_example'] = [
       '#value' => $this->t("AJAX 'Append': Click to append something"),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_append_callback',
-      ),
+      ],
       '#suffix' => '<div id="append_div">Append inside this div</div>',
-    );
+    ];
 
 
     // Shows the 'before' command.
-    $form['before_command_example'] = array(
+    $form['before_command_example'] = [
       '#value' => $this->t("AJAX 'before': Click to put something before the div"),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_before_callback',
-      ),
+      ],
       '#suffix' => '<div id="before_div">Insert something before this.</div>',
-    );
+    ];
 
     // Shows the 'changed' command without asterisk.
-    $form['changed_command_example'] = array(
+    $form['changed_command_example'] = [
       '#value' => $this->t("AJAX changed: Click to mark div changed."),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_changed_callback',
-      ),
+      ],
       '#suffix' => '<div id="changed_div"> <div id="changed_div_mark_this">This div can be marked as changed or not.</div></div>',
-    );
+    ];
     // Shows the 'changed' command adding the asterisk.
-    $form['changed_command_asterisk_example'] = array(
+    $form['changed_command_asterisk_example'] = [
       '#value' => $this->t("AJAX changed: Click to mark div changed with asterisk."),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_changed_asterisk_callback',
-      ),
-    );
+      ],
+    ];
 
     // Shows the Ajax 'css' command.
-    $form['css_command_example'] = array(
+    $form['css_command_example'] = [
       '#value' => $this->t("Set the '#box' div to be blue."),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_css_callback',
-      ),
+      ],
       '#suffix' => '<div id="css_div" style="height: 50px; width: 50px; border: 1px solid black"> box</div>',
-    );
+    ];
 
 
     // Shows the Ajax 'data' command. But there is no use of this information,
     // as this would require a javascript client to use the data.
-    $form['data_command_example'] = array(
+    $form['data_command_example'] = [
       '#value' => $this->t("AJAX data command: Issue command."),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_data_callback',
-      ),
+      ],
       '#suffix' => '<div id="data_div">Data attached to this div.</div>',
-    );
+    ];
 
     // Shows the Ajax 'invoke' command.
-    $form['invoke_command_example'] = array(
+    $form['invoke_command_example'] = [
       '#value' => $this->t("AJAX invoke command: Invoke addClass() method."),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_invoke_callback',
-      ),
+      ],
       '#suffix' => '<div id="invoke_div">Original contents</div>',
-    );
+    ];
 
     // Shows the Ajax 'html' command.
-    $form['html_command_example'] = array(
+    $form['html_command_example'] = [
       '#value' => $this->t("AJAX html: Replace the HTML in a selector."),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_html_callback',
-      ),
+      ],
       '#suffix' => '<div id="html_div">Original contents</div>',
-    );
+    ];
 
     // Shows the Ajax 'insert' command.
-    $form['insert_command_example'] = array(
+    $form['insert_command_example'] = [
       '#value' => $this->t("AJAX insert: Let client insert based on #ajax['method']."),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_insert_callback',
         'method' => 'prepend',
-      ),
+      ],
       '#suffix' => '<div id="insert_div">Original contents</div>',
-    );
+    ];
 
     // Shows the Ajax 'prepend' command.
-    $form['prepend_command_example'] = array(
+    $form['prepend_command_example'] = [
       '#value' => $this->t("AJAX 'prepend': Click to prepend something"),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_prepend_callback',
-      ),
+      ],
       '#suffix' => '<div id="prepend_div">Something will be prepended to this div. </div>',
-    );
+    ];
 
     // Shows the Ajax 'remove' command.
-    $form['remove_command_example'] = array(
+    $form['remove_command_example'] = [
       '#value' => $this->t("AJAX 'remove': Click to remove text"),
       '#type' => 'submit',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_remove_callback',
-      ),
+      ],
       '#suffix' => '<div id="remove_div"><div id="remove_text">text to be removed</div></div>',
-    );
+    ];
 
     // Shows the Ajax 'restripe' command.
-    $form['restripe_command_example'] = array(
+    $form['restripe_command_example'] = [
       '#type' => 'submit',
       '#value' => $this->t("AJAX 'restripe' command"),
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_restripe_callback',
-      ),
+      ],
       '#suffix' => '<div id="restripe_div">
                     <table id="restripe_table" style="border: 1px solid black" >
                     <tr id="table-first"><td>first row</td></tr>
                     <tr ><td>second row</td></tr>
                     </table>
                     </div>',
-    );
+    ];
 
     // Demonstrates the Ajax 'settings' command. The 'settings' command has
     // nothing visual to "show", but it can be tested via SimpleTest and via
     // Firebug.
-    $form['settings_command_example'] = array(
+    $form['settings_command_example'] = [
       '#type' => 'submit',
       '#value' => $this->t("AJAX 'settings' command"),
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_settings_callback',
-      ),
-    );
+      ],
+    ];
 
     // Shows the Ajax 'add_css' command.
-    $form['add_css_command_example'] = array(
+    $form['add_css_command_example'] = [
       '#type' => 'submit',
       '#value' => $this->t("AJAX 'add_css' command"),
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_advanced_commands_add_css_callback',
-      ),
-    );
+      ],
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestLazyLoadForm.php b/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestLazyLoadForm.php
index 19aaaf35e57f0eeb4892f9ddd2d295f467b6da9e..852cf4435214dd02434f1e7434b5c169fcce832f 100644
--- a/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestLazyLoadForm.php
+++ b/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestLazyLoadForm.php
@@ -26,20 +26,20 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // command to ensure that the 'currentPath' setting is not part
     // of the Ajax response.
     $form['#attached']['drupalSettings']['test'] = 'currentPathUpdate';
-    $form['add_files'] = array(
+    $form['add_files'] = [
       '#title' => $this->t('Add files'),
       '#type' => 'checkbox',
       '#default_value' => FALSE,
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Submit'),
-      '#ajax' => array(
+      '#ajax' => [
         'wrapper' => 'ajax-forms-test-lazy-load-ajax-wrapper',
         'callback' => 'ajax_forms_test_lazy_load_form_ajax',
-      ),
+      ],
       '#prefix' => '<div id="ajax-forms-test-lazy-load-ajax-wrapper"></div>',
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestSimpleForm.php b/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestSimpleForm.php
index 8ec5b71a51e0cb25e59a4fc4eafb2e1af8ab9811..f69a1232319cd9363e0f334666e108522aa09ab0 100644
--- a/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestSimpleForm.php
+++ b/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestSimpleForm.php
@@ -24,47 +24,47 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $object = new Callbacks();
 
-    $form = array();
-    $form['select'] = array(
+    $form = [];
+    $form['select'] = [
       '#title' => $this->t('Color'),
       '#type' => 'select',
-      '#options' => array(
+      '#options' => [
         'red' => 'red',
         'green' => 'green',
-        'blue' => 'blue'),
-      '#ajax' => array(
-        'callback' => array($object, 'selectCallback'),
-      ),
+        'blue' => 'blue'],
+      '#ajax' => [
+        'callback' => [$object, 'selectCallback'],
+      ],
       '#suffix' => '<div id="ajax_selected_color">No color yet selected</div>',
-    );
+    ];
 
-    $form['checkbox'] = array(
+    $form['checkbox'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Test checkbox'),
-      '#ajax' => array(
-        'callback' => array($object, 'checkboxCallback'),
-      ),
+      '#ajax' => [
+        'callback' => [$object, 'checkboxCallback'],
+      ],
       '#suffix' => '<div id="ajax_checkbox_value">No action yet</div>',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('submit'),
-    );
+    ];
 
     // This is for testing invalid callbacks that should return a 500 error in
     // \Drupal\Core\Form\FormAjaxResponseBuilderInterface::buildResponse().
-    $invalid_callbacks = array(
+    $invalid_callbacks = [
       'null' => NULL,
       'empty' => '',
       'nonexistent' => 'some_function_that_does_not_exist',
-    );
+    ];
     foreach ($invalid_callbacks as $key => $value) {
-      $form['select_' . $key . '_callback'] = array(
+      $form['select_' . $key . '_callback'] = [
         '#type' => 'select',
-        '#title' => $this->t('Test %key callbacks', array('%key' => $key)),
-        '#options' => array('red' => 'red'),
-        '#ajax' => array('callback' => $value),
-      );
+        '#title' => $this->t('Test %key callbacks', ['%key' => $key]),
+        '#options' => ['red' => 'red'],
+        '#ajax' => ['callback' => $value],
+      ];
     }
 
     $form['test_group'] = [
diff --git a/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestValidationForm.php b/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestValidationForm.php
index dbf0b7fa5a25bba7edb9bf51b0343cbb5ec70a3e..fb3019493c0defac95f5a56ceefe6b6da3aa23a1 100644
--- a/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestValidationForm.php
+++ b/core/modules/system/tests/modules/ajax_forms_test/src/Form/AjaxFormsTestValidationForm.php
@@ -21,42 +21,42 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['drivertext'] = array(
+    $form['drivertext'] = [
       '#title' => $this->t('AJAX-enabled textfield.'),
       '#description' => $this->t("When this one AJAX-triggers and the spare required field is empty, you should not get an error."),
       '#type' => 'textfield',
       '#default_value' => $form_state->getValue('drivertext', ''),
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_validation_form_callback',
         'wrapper' => 'message_area',
         'method' => 'replace',
-      ),
+      ],
       '#suffix' => '<div id="message_area"></div>',
-    );
+    ];
 
-    $form['drivernumber'] = array(
+    $form['drivernumber'] = [
       '#title' => $this->t('AJAX-enabled number field.'),
       '#description' => $this->t("When this one AJAX-triggers and the spare required field is empty, you should not get an error."),
       '#type' => 'number',
       '#default_value' => $form_state->getValue('drivernumber', ''),
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'ajax_forms_test_validation_number_form_callback',
         'wrapper' => 'message_area_number',
         'method' => 'replace',
-      ),
+      ],
       '#suffix' => '<div id="message_area_number"></div>',
-    );
+    ];
 
-    $form['spare_required_field'] = array(
+    $form['spare_required_field'] = [
       '#title' => $this->t("Spare Required Field"),
       '#type' => 'textfield',
       '#required' => TRUE,
-    );
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php b/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
index 63cc0abf1634d9d8c25a22fdbd7016b2a4f78c1d..5ba65e8013a66ed372158617e17430f1ba7f8ffc 100644
--- a/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
+++ b/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
@@ -22,22 +22,22 @@ class AjaxTestController {
    */
   public static function dialogContents() {
     // This is a regular render array; the keys do not have special meaning.
-    $content = array(
+    $content = [
       '#title' => '<em>AJAX Dialog & contents</em>',
-      'content' => array(
+      'content' => [
         '#markup' => 'Example message',
-      ),
-      'cancel' => array(
+      ],
+      'cancel' => [
         '#type' => 'link',
         '#title' => 'Cancel',
         '#url' => Url::fromRoute('<front>'),
-        '#attributes' => array(
+        '#attributes' => [
           // This is a special class to which JavaScript assigns dialog closing
           // behavior.
-          'class' => array('dialog-cancel'),
-        ),
-      ),
-    );
+          'class' => ['dialog-cancel'],
+        ],
+      ],
+    ];
 
     return $content;
   }
@@ -111,88 +111,88 @@ public function renderError(Request $request) {
   public function dialog() {
     // Add two wrapper elements for testing non-modal dialogs. Modal dialogs use
     // the global drupal-modal wrapper by default.
-    $build['dialog_wrappers'] = array('#markup' => '<div id="ajax-test-dialog-wrapper-1"></div><div id="ajax-test-dialog-wrapper-2"></div>');
+    $build['dialog_wrappers'] = ['#markup' => '<div id="ajax-test-dialog-wrapper-1"></div><div id="ajax-test-dialog-wrapper-2"></div>'];
 
     // Dialog behavior applied to a button.
     $build['form'] = \Drupal::formBuilder()->getForm('Drupal\ajax_test\Form\AjaxTestDialogForm');
 
     // Dialog behavior applied to a #type => 'link'.
-    $build['link'] = array(
+    $build['link'] = [
       '#type' => 'link',
       '#title' => 'Link 1 (modal)',
       '#url' => Url::fromRoute('ajax_test.dialog_contents'),
-      '#attributes' => array(
-        'class' => array('use-ajax'),
+      '#attributes' => [
+        'class' => ['use-ajax'],
         'data-dialog-type' => 'modal',
-      ),
-    );
+      ],
+    ];
 
     // Dialog behavior applied to links rendered by links.html.twig.
-    $build['links'] = array(
+    $build['links'] = [
       '#theme' => 'links',
-      '#links' => array(
-        'link2' => array(
+      '#links' => [
+        'link2' => [
           'title' => 'Link 2 (modal)',
           'url' => Url::fromRoute('ajax_test.dialog_contents'),
-          'attributes' => array(
-            'class' => array('use-ajax'),
+          'attributes' => [
+            'class' => ['use-ajax'],
             'data-dialog-type' => 'modal',
-            'data-dialog-options' => json_encode(array(
+            'data-dialog-options' => json_encode([
               'width' => 400,
-            ))
-          ),
-        ),
-        'link3' => array(
+            ])
+          ],
+        ],
+        'link3' => [
           'title' => 'Link 3 (non-modal)',
           'url' => Url::fromRoute('ajax_test.dialog_contents'),
-          'attributes' => array(
-            'class' => array('use-ajax'),
+          'attributes' => [
+            'class' => ['use-ajax'],
             'data-dialog-type' => 'dialog',
-            'data-dialog-options' => json_encode(array(
+            'data-dialog-options' => json_encode([
               'target' => 'ajax-test-dialog-wrapper-1',
               'width' => 800,
-            ))
-          ),
-        ),
-        'link4' => array(
+            ])
+          ],
+        ],
+        'link4' => [
           'title' => 'Link 4 (close non-modal if open)',
           'url' => Url::fromRoute('ajax_test.dialog_close'),
-          'attributes' => array(
-            'class' => array('use-ajax'),
+          'attributes' => [
+            'class' => ['use-ajax'],
             'data-dialog-type' => 'modal',
-          ),
-        ),
-        'link5' => array(
+          ],
+        ],
+        'link5' => [
           'title' => 'Link 5 (form)',
           'url' => Url::fromRoute('ajax_test.dialog_form'),
-          'attributes' => array(
-            'class' => array('use-ajax'),
+          'attributes' => [
+            'class' => ['use-ajax'],
             'data-dialog-type' => 'modal',
-          ),
-        ),
-        'link6' => array(
+          ],
+        ],
+        'link6' => [
           'title' => 'Link 6 (entity form)',
           'url' => Url::fromRoute('contact.form_add'),
-          'attributes' => array(
-            'class' => array('use-ajax'),
+          'attributes' => [
+            'class' => ['use-ajax'],
             'data-dialog-type' => 'modal',
-            'data-dialog-options' => json_encode(array(
+            'data-dialog-options' => json_encode([
               'width' => 800,
               'height' => 500,
-            ))
-          ),
-        ),
-        'link7' => array(
+            ])
+          ],
+        ],
+        'link7' => [
           'title' => 'Link 7 (non-modal, no target)',
           'url' => Url::fromRoute('ajax_test.dialog_contents'),
-          'attributes' => array(
-            'class' => array('use-ajax'),
+          'attributes' => [
+            'class' => ['use-ajax'],
             'data-dialog-type' => 'dialog',
-            'data-dialog-options' => json_encode(array(
+            'data-dialog-options' => json_encode([
               'width' => 800,
-            ))
-          ),
-        ),
+            ])
+          ],
+        ],
         'link8' => [
           'title' => 'Link 8 (ajax)',
           'url' => Url::fromRoute('ajax_test.admin.theme'),
@@ -204,8 +204,8 @@ public function dialog() {
             ]),
           ],
         ],
-      ),
-    );
+      ],
+    ];
 
     return $build;
   }
diff --git a/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestDialogForm.php b/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestDialogForm.php
index a97ed9525bcadcb4d5effecea6b670186de611a4..5f11b6b71a2c2226deec446e5577562f908eb189 100644
--- a/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestDialogForm.php
+++ b/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestDialogForm.php
@@ -28,25 +28,25 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // In order to use WebTestBase::drupalPostAjaxForm() to POST from a link, we need
     // to have a dummy field we can set in WebTestBase::drupalPostForm() else it won't
     // submit anything.
-    $form['textfield'] = array(
+    $form['textfield'] = [
       '#type' => 'hidden'
-    );
-    $form['button1'] = array(
+    ];
+    $form['button1'] = [
       '#type' => 'submit',
       '#name' => 'button1',
       '#value' => 'Button 1 (modal)',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => '::modal',
-      ),
-    );
-    $form['button2'] = array(
+      ],
+    ];
+    $form['button2'] = [
       '#type' => 'submit',
       '#name' => 'button2',
       '#value' => 'Button 2 (non-modal)',
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => '::nonModal',
-      ),
-    );
+      ],
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php b/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php
index 604876994e22a3605cf2e7131cf0bd7d9f233ee3..ea431efa5adc1cac029018a6f40fcfca62a2cbcd 100644
--- a/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php
+++ b/core/modules/system/tests/modules/ajax_test/src/Form/AjaxTestForm.php
@@ -24,23 +24,23 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     $form['#action'] = \Drupal::url('ajax_test.dialog');
 
-    $form['description'] = array(
+    $form['description'] = [
       '#markup' => '<p>' . $this->t("Ajax Form contents description.") . '</p>',
-    );
+    ];
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions',
-    );
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Do it'),
-    );
-    $form['actions']['preview'] = array(
+    ];
+    $form['actions']['preview'] = [
       '#type' => 'submit',
       '#value' => $this->t('Preview'),
       // No regular submit-handler. This form only works via JavaScript.
-      '#submit' => array(),
-      '#ajax' => array(
+      '#submit' => [],
+      '#ajax' => [
         // This means the ::preview() method on this class would be invoked in
         // case of a click event. However, since Drupal core's test runner only
         // is able to execute PHP, not JS, there is no point in actually
@@ -51,8 +51,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         // we cannot meaningfully test it anyway.
         'callback' => '::preview',
         'event' => 'click',
-      ),
-    );
+      ],
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/batch_test/batch_test.callbacks.inc b/core/modules/system/tests/modules/batch_test/batch_test.callbacks.inc
index 4a271b087a1919922b33f1c7c766b42a1384b02c..9116c85fed7a9f0e258368a2891a5b472d70923d 100644
--- a/core/modules/system/tests/modules/batch_test/batch_test.callbacks.inc
+++ b/core/modules/system/tests/modules/batch_test/batch_test.callbacks.inc
@@ -100,7 +100,7 @@ function _batch_test_finished_helper($batch_id, $success, $results, $operations)
   if (!$success) {
     // A fatal error occurred during the processing.
     $error_operation = reset($operations);
-    $messages[] = t('An error occurred while processing @op with arguments:<br />@args', array('@op' => $error_operation[0], '@args' => print_r($error_operation[1], TRUE)));
+    $messages[] = t('An error occurred while processing @op with arguments:<br />@args', ['@op' => $error_operation[0], '@args' => print_r($error_operation[1], TRUE)]);
   }
 
   // Use item list template to render the messages.
diff --git a/core/modules/system/tests/modules/batch_test/batch_test.module b/core/modules/system/tests/modules/batch_test/batch_test.module
index e7a8de6e2491a2d2150d4c7381edb8703d17dff8..59327de4fe2cd9998c89e9da34b8feffe2f40329 100644
--- a/core/modules/system/tests/modules/batch_test/batch_test.module
+++ b/core/modules/system/tests/modules/batch_test/batch_test.module
@@ -20,11 +20,11 @@ function _batch_test_nested_drupal_form_submit_callback($value) {
  * Batch 0: Does nothing.
  */
 function _batch_test_batch_0() {
-  $batch = array(
-    'operations' => array(),
+  $batch = [
+    'operations' => [],
     'finished' => '_batch_test_finished_0',
     'file' => drupal_get_path('module', 'batch_test') . '/batch_test.callbacks.inc',
-  );
+  ];
   return $batch;
 }
 
@@ -38,15 +38,15 @@ function _batch_test_batch_1() {
   $total = 10;
   $sleep = (1000000 / $total) * 2;
 
-  $operations = array();
+  $operations = [];
   for ($i = 1; $i <= $total; $i++) {
-    $operations[] = array('_batch_test_callback_1', array($i, $sleep));
+    $operations[] = ['_batch_test_callback_1', [$i, $sleep]];
   }
-  $batch = array(
+  $batch = [
     'operations' => $operations,
     'finished' => '_batch_test_finished_1',
     'file' => drupal_get_path('module', 'batch_test') . '/batch_test.callbacks.inc',
-  );
+  ];
   return $batch;
 }
 
@@ -60,14 +60,14 @@ function _batch_test_batch_2() {
   $total = 10;
   $sleep = (1000000 / $total) * 2;
 
-  $operations = array(
-    array('_batch_test_callback_2', array(1, $total, $sleep)),
-  );
-  $batch = array(
+  $operations = [
+    ['_batch_test_callback_2', [1, $total, $sleep]],
+  ];
+  $batch = [
     'operations' => $operations,
     'finished' => '_batch_test_finished_2',
     'file' => drupal_get_path('module', 'batch_test') . '/batch_test.callbacks.inc',
-  );
+  ];
   return $batch;
 }
 
@@ -85,20 +85,20 @@ function _batch_test_batch_3() {
   $total = 10;
   $sleep = (1000000 / $total) * 2;
 
-  $operations = array();
+  $operations = [];
   for ($i = 1; $i <= round($total / 2); $i++) {
-    $operations[] = array('_batch_test_callback_1', array($i, $sleep));
+    $operations[] = ['_batch_test_callback_1', [$i, $sleep]];
   }
-  $operations[] = array('_batch_test_callback_2', array(1, $total / 2, $sleep));
+  $operations[] = ['_batch_test_callback_2', [1, $total / 2, $sleep]];
   for ($i = round($total / 2) + 1; $i <= $total; $i++) {
-    $operations[] = array('_batch_test_callback_1', array($i, $sleep));
+    $operations[] = ['_batch_test_callback_1', [$i, $sleep]];
   }
-  $operations[] = array('_batch_test_callback_2', array(6, $total / 2, $sleep));
-  $batch = array(
+  $operations[] = ['_batch_test_callback_2', [6, $total / 2, $sleep]];
+  $batch = [
     'operations' => $operations,
     'finished' => '_batch_test_finished_3',
     'file' => drupal_get_path('module', 'batch_test') . '/batch_test.callbacks.inc',
-  );
+  ];
   return $batch;
 }
 
@@ -115,19 +115,19 @@ function _batch_test_batch_4() {
   $total = 10;
   $sleep = (1000000 / $total) * 2;
 
-  $operations = array();
+  $operations = [];
   for ($i = 1; $i <= round($total / 2); $i++) {
-    $operations[] = array('_batch_test_callback_1', array($i, $sleep));
+    $operations[] = ['_batch_test_callback_1', [$i, $sleep]];
   }
-  $operations[] = array('_batch_test_nested_batch_callback', array());
+  $operations[] = ['_batch_test_nested_batch_callback', []];
   for ($i = round($total / 2) + 1; $i <= $total; $i++) {
-    $operations[] = array('_batch_test_callback_1', array($i, $sleep));
+    $operations[] = ['_batch_test_callback_1', [$i, $sleep]];
   }
-  $batch = array(
+  $batch = [
     'operations' => $operations,
     'finished' => '_batch_test_finished_4',
     'file' => drupal_get_path('module', 'batch_test') . '/batch_test.callbacks.inc',
-  );
+  ];
   return $batch;
 }
 
@@ -141,15 +141,15 @@ function _batch_test_batch_5() {
   $total = 10;
   $sleep = (1000000 / $total) * 2;
 
-  $operations = array();
+  $operations = [];
   for ($i = 1; $i <= $total; $i++) {
-    $operations[] = array('_batch_test_callback_5', array($i, $sleep));
+    $operations[] = ['_batch_test_callback_5', [$i, $sleep]];
   }
-  $batch = array(
+  $batch = [
     'operations' => $operations,
     'finished' => '_batch_test_finished_5',
     'file' => drupal_get_path('module', 'batch_test') . '/batch_test.callbacks.inc',
-  );
+  ];
   return $batch;
 }
 
diff --git a/core/modules/system/tests/modules/batch_test/src/Controller/BatchTestController.php b/core/modules/system/tests/modules/batch_test/src/Controller/BatchTestController.php
index 811c7fc3568b5b6be28d5d4a1a6f173edf8e8ac1..1cdaf5cc853dca82277675fa608ffc8e7afdc9c9 100644
--- a/core/modules/system/tests/modules/batch_test/src/Controller/BatchTestController.php
+++ b/core/modules/system/tests/modules/batch_test/src/Controller/BatchTestController.php
@@ -16,11 +16,11 @@ class BatchTestController {
    *   Render array containing success message.
    */
   public function testRedirect() {
-    return array(
-      'success' => array(
+    return [
+      'success' => [
         '#markup' => 'Redirection successful.',
-      )
-    );
+      ]
+    ];
   }
 
   /**
@@ -47,9 +47,9 @@ public function testLargePercentage() {
    */
   public function testNestedDrupalFormSubmit($value = 1) {
     // Set the batch and process it.
-    $batch['operations'] = array(
-      array('_batch_test_nested_drupal_form_submit_callback', array($value)),
-    );
+    $batch['operations'] = [
+      ['_batch_test_nested_drupal_form_submit_callback', [$value]],
+    ];
     batch_set($batch);
     return batch_process('batch-test/redirect');
   }
@@ -100,11 +100,11 @@ function testProgrammatic($value = 1) {
       'value' => $value,
     ]);
     \Drupal::formBuilder()->submitForm('Drupal\batch_test\Form\BatchTestChainedForm', $form_state);
-    return array(
-      'success' => array(
+    return [
+      'success' => [
         '#markup' => 'Got out of a programmatic batched form.',
-      )
-    );
+      ]
+    ];
   }
 
   /**
@@ -115,11 +115,11 @@ function testProgrammatic($value = 1) {
    */
   public function testThemeBatch() {
     batch_test_stack(NULL, TRUE);
-    $batch = array(
-      'operations' => array(
-        array('_batch_test_theme_callback', array()),
-      ),
-    );
+    $batch = [
+      'operations' => [
+        ['_batch_test_theme_callback', []],
+      ],
+    ];
     batch_set($batch);
     return batch_process('batch-test/redirect');
   }
diff --git a/core/modules/system/tests/modules/batch_test/src/Form/BatchTestChainedForm.php b/core/modules/system/tests/modules/batch_test/src/Form/BatchTestChainedForm.php
index aa19ad3faba9ddc6d76cdf73245b984dbfa6e7e5..fe2d02c5f13164e0b4768090d60f30a8d2c90679 100644
--- a/core/modules/system/tests/modules/batch_test/src/Form/BatchTestChainedForm.php
+++ b/core/modules/system/tests/modules/batch_test/src/Form/BatchTestChainedForm.php
@@ -23,21 +23,21 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     // This value is used to test that $form_state persists through batched
     // submit handlers.
-    $form['value'] = array(
+    $form['value'] = [
       '#type' => 'textfield',
       '#title' => 'Value',
       '#default_value' => 1,
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
-    $form['#submit'] = array(
+    ];
+    $form['#submit'] = [
       'Drupal\batch_test\Form\BatchTestChainedForm::batchTestChainedFormSubmit1',
       'Drupal\batch_test\Form\BatchTestChainedForm::batchTestChainedFormSubmit2',
       'Drupal\batch_test\Form\BatchTestChainedForm::batchTestChainedFormSubmit3',
       'Drupal\batch_test\Form\BatchTestChainedForm::batchTestChainedFormSubmit4',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMockForm.php b/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMockForm.php
index ec8caff09131ef6bc3adf10afc1a23cfee8b42f9..2d26bcf4d58cfec0ba1e812f9e79eedd825ee565 100644
--- a/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMockForm.php
+++ b/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMockForm.php
@@ -21,14 +21,14 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['test_value'] = array(
+    $form['test_value'] = [
       '#title' => t('Test value'),
       '#type' => 'textfield',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMultiStepForm.php b/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMultiStepForm.php
index 260941f50b6174c3642fec2330c319320116ed28..916831e96b503e38d8f3f82c1a1adad526dd3c44 100644
--- a/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMultiStepForm.php
+++ b/core/modules/system/tests/modules/batch_test/src/Form/BatchTestMultiStepForm.php
@@ -27,13 +27,13 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       $form_state->set('step', $step);
     }
 
-    $form['step_display'] = array(
+    $form['step_display'] = [
       '#markup' => 'step ' . $step . '<br/>',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
 
     // This is a POST form with multiple steps that does not transition from one
     // step to the next via POST requests, but via GET requests, because it uses
diff --git a/core/modules/system/tests/modules/batch_test/src/Form/BatchTestSimpleForm.php b/core/modules/system/tests/modules/batch_test/src/Form/BatchTestSimpleForm.php
index 92cf6b110a67d0ee375f2da585d984b2eb422333..999649dfc2d9e942ab8e3c8c3d287ef388943381 100644
--- a/core/modules/system/tests/modules/batch_test/src/Form/BatchTestSimpleForm.php
+++ b/core/modules/system/tests/modules/batch_test/src/Form/BatchTestSimpleForm.php
@@ -21,21 +21,21 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['batch'] = array(
+    $form['batch'] = [
       '#type' => 'select',
       '#title' => 'Choose batch',
-      '#options' => array(
+      '#options' => [
         'batch_0' => 'batch 0',
         'batch_1' => 'batch 1',
         'batch_2' => 'batch 2',
         'batch_3' => 'batch 3',
         'batch_4' => 'batch 4',
-      ),
-    );
-    $form['submit'] = array(
+      ],
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/common_test/common_test.module b/core/modules/system/tests/modules/common_test/common_test.module
index 0633ac889da4fee5feaed774f4536db562d71dd5..97bba7b3414d1aacde8880a675bb85ba8a26efaf 100644
--- a/core/modules/system/tests/modules/common_test/common_test.module
+++ b/core/modules/system/tests/modules/common_test/common_test.module
@@ -114,18 +114,18 @@ function common_test_module_implements_alter(&$implementations, $hook) {
  * Implements hook_theme().
  */
 function common_test_theme() {
-  return array(
-    'common_test_foo' => array(
-      'variables' => array('foo' => 'foo', 'bar' => 'bar'),
-    ),
-    'common_test_render_element' => array(
+  return [
+    'common_test_foo' => [
+      'variables' => ['foo' => 'foo', 'bar' => 'bar'],
+    ],
+    'common_test_render_element' => [
       'render element' => 'foo',
-    ),
-    'common_test_empty' => array(
-      'variables' => array('foo' => 'foo'),
+    ],
+    'common_test_empty' => [
+      'variables' => ['foo' => 'foo'],
       'function' => 'theme_common_test_empty',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/system/tests/modules/common_test/src/Controller/CommonTestController.php b/core/modules/system/tests/modules/common_test/src/Controller/CommonTestController.php
index f77a5813a616fca1ba6f82289a273bad68ba9d69..bb98a59c97499f5fbc4646e5e4246149392a3f0c 100644
--- a/core/modules/system/tests/modules/common_test/src/Controller/CommonTestController.php
+++ b/core/modules/system/tests/modules/common_test/src/Controller/CommonTestController.php
@@ -18,40 +18,40 @@ class CommonTestController {
    * generator.
    */
   public function typeLinkActiveClass() {
-    return array(
-      'no_query' => array(
+    return [
+      'no_query' => [
         '#type' => 'link',
         '#title' => t('Link with no query string'),
         '#url' => Url::fromRoute('<current>'),
-        '#options' => array(
+        '#options' => [
           'set_active_class' => TRUE,
-        ),
-      ),
-      'with_query' => array(
+        ],
+      ],
+      'with_query' => [
         '#type' => 'link',
         '#title' => t('Link with a query string'),
         '#url' => Url::fromRoute('<current>'),
-        '#options' => array(
-          'query' => array(
+        '#options' => [
+          'query' => [
             'foo' => 'bar',
             'one' => 'two',
-          ),
+          ],
           'set_active_class' => TRUE,
-        ),
-      ),
-      'with_query_reversed' => array(
+        ],
+      ],
+      'with_query_reversed' => [
         '#type' => 'link',
         '#title' => t('Link with the same query string in reverse order'),
         '#url' => Url::fromRoute('<current>'),
-        '#options' => array(
-          'query' => array(
+        '#options' => [
+          'query' => [
             'one' => 'two',
             'foo' => 'bar',
-          ),
+          ],
           'set_active_class' => TRUE,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -61,18 +61,18 @@ public function typeLinkActiveClass() {
    *   An empty string.
    */
   public function jsAndCssQuerystring() {
-    $attached = array(
-      '#attached' => array(
-        'library' => array(
+    $attached = [
+      '#attached' => [
+        'library' => [
           'node/drupal.node',
-        ),
-        'css' => array(
-          drupal_get_path('module', 'node') . '/css/node.admin.css' => array(),
+        ],
+        'css' => [
+          drupal_get_path('module', 'node') . '/css/node.admin.css' => [],
           // A relative URI may have a query string.
-          '/' . drupal_get_path('module', 'node') . '/node-fake.css?arg1=value1&arg2=value2' => array(),
-        ),
-      ),
-    );
+          '/' . drupal_get_path('module', 'node') . '/node-fake.css?arg1=value1&arg2=value2' => [],
+        ],
+      ],
+    ];
     return \Drupal::service('renderer')->renderRoot($attached);
   }
 
diff --git a/core/modules/system/tests/modules/condition_test/src/FormController.php b/core/modules/system/tests/modules/condition_test/src/FormController.php
index 38b21ccade49b4680c68126f31a0553b6d4e7b17..da475ae0c4e93d9eaca491c85403b6e06bd6d6da 100644
--- a/core/modules/system/tests/modules/condition_test/src/FormController.php
+++ b/core/modules/system/tests/modules/condition_test/src/FormController.php
@@ -39,10 +39,10 @@ public function __construct() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $form = $this->condition->buildConfigurationForm($form, $form_state);
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/database_test/database_test.install b/core/modules/system/tests/modules/database_test/database_test.install
index f6b4f68d82cc6d31c54f8f1a7a13c369008f36bd..62cf38addd35d1b3095c715fd9811a24c4cd7838 100644
--- a/core/modules/system/tests/modules/database_test/database_test.install
+++ b/core/modules/system/tests/modules/database_test/database_test.install
@@ -14,281 +14,281 @@
  * like any other, not directly in the test file.
  */
 function database_test_schema() {
-  $schema['test'] = array(
+  $schema['test'] = [
     'description' => 'Basic test table for the database unit tests.',
-    'fields' => array(
-      'id' => array(
+    'fields' => [
+      'id' => [
         'type' => 'serial',
         'unsigned' => TRUE,
         'not null' => TRUE,
-      ),
-      'name' => array(
+      ],
+      'name' => [
         'description' => "A person's name",
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'binary' => TRUE,
-      ),
-      'age' => array(
+      ],
+      'age' => [
         'description' => "The person's age",
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'job' => array(
+      ],
+      'job' => [
         'description' => "The person's job",
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => 'Undefined',
-      ),
-    ),
-    'primary key' => array('id'),
-    'unique keys' => array(
-      'name' => array('name')
-    ),
-    'indexes' => array(
-      'ages' => array('age'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['id'],
+    'unique keys' => [
+      'name' => ['name']
+    ],
+    'indexes' => [
+      'ages' => ['age'],
+    ],
+  ];
 
   // This is an alternate version of the same table that is structured the same
   // but has a non-serial Primary Key.
-  $schema['test_people'] = array(
+  $schema['test_people'] = [
     'description' => 'A duplicate version of the test table, used for additional tests.',
-    'fields' => array(
-      'name' => array(
+    'fields' => [
+      'name' => [
         'description' => "A person's name",
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'age' => array(
+      ],
+      'age' => [
         'description' => "The person's age",
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'job' => array(
+      ],
+      'job' => [
         'description' => "The person's job",
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
-      ),
-    ),
-    'primary key' => array('job'),
-    'indexes' => array(
-      'ages' => array('age'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['job'],
+    'indexes' => [
+      'ages' => ['age'],
+    ],
+  ];
 
-  $schema['test_people_copy'] = array(
+  $schema['test_people_copy'] = [
     'description' => 'A duplicate version of the test_people table, used for additional tests.',
-    'fields' => array(
-      'name' => array(
+    'fields' => [
+      'name' => [
         'description' => "A person's name",
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'age' => array(
+      ],
+      'age' => [
         'description' => "The person's age",
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'job' => array(
+      ],
+      'job' => [
         'description' => "The person's job",
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
-      ),
-    ),
-    'primary key' => array('job'),
-    'indexes' => array(
-      'ages' => array('age'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['job'],
+    'indexes' => [
+      'ages' => ['age'],
+    ],
+  ];
 
-  $schema['test_one_blob'] = array(
+  $schema['test_one_blob'] = [
     'description' => 'A simple table including a BLOB field for testing BLOB behavior.',
-    'fields' => array(
-      'id' => array(
+    'fields' => [
+      'id' => [
         'description' => 'Simple unique ID.',
         'type' => 'serial',
         'not null' => TRUE,
-      ),
-      'blob1' => array(
+      ],
+      'blob1' => [
         'description' => 'A BLOB field.',
         'type' => 'blob',
-      ),
-    ),
-    'primary key' => array('id'),
-    );
+      ],
+    ],
+    'primary key' => ['id'],
+    ];
 
-  $schema['test_two_blobs'] = array(
+  $schema['test_two_blobs'] = [
     'description' => 'A simple test table with two BLOB fields.',
-    'fields' => array(
-      'id' => array(
+    'fields' => [
+      'id' => [
         'description' => 'Simple unique ID.',
         'type' => 'serial',
         'not null' => TRUE,
-      ),
-      'blob1' => array(
+      ],
+      'blob1' => [
         'description' => 'A dummy BLOB field.',
         'type' => 'blob',
-      ),
-      'blob2' => array(
+      ],
+      'blob2' => [
         'description' => 'A second BLOB field.',
         'type' => 'blob'
-      ),
-    ),
-    'primary key' => array('id'),
-    );
+      ],
+    ],
+    'primary key' => ['id'],
+    ];
 
-  $schema['test_task'] = array(
+  $schema['test_task'] = [
     'description' => 'A task list for people in the test table.',
-    'fields' => array(
-      'tid' => array(
+    'fields' => [
+      'tid' => [
         'description' => 'Task ID, primary key.',
         'type' => 'serial',
         'not null' => TRUE,
-      ),
-      'pid' => array(
+      ],
+      'pid' => [
         'description' => 'The {test_people}.pid, foreign key for the test table.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'task' => array(
+      ],
+      'task' => [
         'description' => 'The task to be completed.',
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'priority' => array(
+      ],
+      'priority' => [
         'description' => 'The priority of the task.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'primary key' => array('tid'),
-  );
+      ],
+    ],
+    'primary key' => ['tid'],
+  ];
 
-  $schema['test_null'] = array(
+  $schema['test_null'] = [
     'description' => 'Basic test table for NULL value handling.',
-    'fields' => array(
-      'id' => array(
+    'fields' => [
+      'id' => [
         'type' => 'serial',
         'unsigned' => TRUE,
         'not null' => TRUE,
-      ),
-      'name' => array(
+      ],
+      'name' => [
         'description' => "A person's name.",
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => FALSE,
         'default' => '',
-      ),
-      'age' => array(
+      ],
+      'age' => [
         'description' => "The person's age.",
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => FALSE,
-        'default' => 0),
-    ),
-    'primary key' => array('id'),
-    'unique keys' => array(
-      'name' => array('name')
-    ),
-    'indexes' => array(
-      'ages' => array('age'),
-    ),
-  );
+        'default' => 0],
+    ],
+    'primary key' => ['id'],
+    'unique keys' => [
+      'name' => ['name']
+    ],
+    'indexes' => [
+      'ages' => ['age'],
+    ],
+  ];
 
-  $schema['test_serialized'] = array(
+  $schema['test_serialized'] = [
     'description' => 'Basic test table for NULL value handling.',
-    'fields' => array(
-      'id' => array(
+    'fields' => [
+      'id' => [
         'type' => 'serial',
         'unsigned' => TRUE,
         'not null' => TRUE,
-      ),
-      'name' => array(
+      ],
+      'name' => [
         'description' => "A person's name.",
         'type' => 'varchar_ascii',
         'length' => 255,
         'not null' => FALSE,
         'default' => '',
-      ),
-      'info' => array(
+      ],
+      'info' => [
         'description' => "The person's data in serialized form.",
         'type' => 'blob',
         'serialize' => TRUE,
-      ),
-    ),
-    'primary key' => array('id'),
-    'unique keys' => array(
-      'name' => array('name')
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['id'],
+    'unique keys' => [
+      'name' => ['name']
+    ],
+  ];
 
-  $schema['test_composite_primary'] = array(
+  $schema['test_composite_primary'] = [
     'description' => 'Basic test table with a composite primary key',
-    'fields' => array(
-      'name' => array(
+    'fields' => [
+      'name' => [
         'description' => "A person's name",
         'type' => 'varchar',
         'length' => 50,
         'not null' => TRUE,
         'default' => '',
         'binary' => TRUE,
-      ),
-      'age' => array(
+      ],
+      'age' => [
         'description' => "The person's age",
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'job' => array(
+      ],
+      'job' => [
         'description' => "The person's job",
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => 'Undefined',
-      ),
-    ),
-    'primary key' => array('name', 'age'),
-  );
+      ],
+    ],
+    'primary key' => ['name', 'age'],
+  ];
 
-  $schema['test_special_columns'] = array(
+  $schema['test_special_columns'] = [
     'description' => 'A simple test table with special column names.',
-    'fields' => array(
-      'id' => array(
+    'fields' => [
+      'id' => [
         'description' => 'Simple unique ID.',
         'type' => 'int',
         'not null' => TRUE,
-      ),
-      'offset' => array(
+      ],
+      'offset' => [
         'description' => 'A column with preserved name.',
         'type' => 'text',
-      ),
-    ),
-    'primary key' => array('id'),
-  );
+      ],
+    ],
+    'primary key' => ['id'],
+  ];
 
   $schema['TEST_UPPERCASE'] = $schema['test'];
 
diff --git a/core/modules/system/tests/modules/database_test/src/Controller/DatabaseTestController.php b/core/modules/system/tests/modules/database_test/src/Controller/DatabaseTestController.php
index 7de24d49e8f51e74de4fb384bb48de6b20759108..bd6dd9c7b271655cfea3a51e420c15be649fbcfa 100644
--- a/core/modules/system/tests/modules/database_test/src/Controller/DatabaseTestController.php
+++ b/core/modules/system/tests/modules/database_test/src/Controller/DatabaseTestController.php
@@ -19,11 +19,11 @@ class DatabaseTestController {
    * @return \Symfony\Component\HttpFoundation\JsonResponse
    */
   public function dbQueryTemporary() {
-    $table_name = db_query_temporary('SELECT age FROM {test}', array());
-    return new JsonResponse(array(
+    $table_name = db_query_temporary('SELECT age FROM {test}', []);
+    return new JsonResponse([
       'table_name' => $table_name,
       'row_count' => db_select($table_name)->countQuery()->execute()->fetchField(),
-    ));
+    ]);
   }
 
   /**
@@ -37,7 +37,7 @@ public function dbQueryTemporary() {
   public function pagerQueryEven($limit) {
     $query = db_select('test', 't');
     $query
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->orderBy('age');
 
     // This should result in 2 pages of results.
@@ -47,9 +47,9 @@ public function pagerQueryEven($limit) {
 
     $names = $query->execute()->fetchCol();
 
-    return new JsonResponse(array(
+    return new JsonResponse([
       'names' => $names,
-    ));
+    ]);
   }
 
   /**
@@ -63,7 +63,7 @@ public function pagerQueryEven($limit) {
   public function pagerQueryOdd($limit) {
     $query = db_select('test_task', 't');
     $query
-      ->fields('t', array('task'))
+      ->fields('t', ['task'])
       ->orderBy('pid');
 
     // This should result in 4 pages of results.
@@ -73,9 +73,9 @@ public function pagerQueryOdd($limit) {
 
     $names = $query->execute()->fetchCol();
 
-    return new JsonResponse(array(
+    return new JsonResponse([
       'names' => $names,
-    ));
+    ]);
   }
 
   /**
@@ -87,16 +87,16 @@ public function pagerQueryOdd($limit) {
    * @return \Symfony\Component\HttpFoundation\JsonResponse
    */
   public function testTablesort() {
-    $header = array(
-      'tid' => array('data' => t('Task ID'), 'field' => 'tid', 'sort' => 'desc'),
-      'pid' => array('data' => t('Person ID'), 'field' => 'pid'),
-      'task' => array('data' => t('Task'), 'field' => 'task'),
-      'priority' => array('data' => t('Priority'), 'field' => 'priority', ),
-    );
+    $header = [
+      'tid' => ['data' => t('Task ID'), 'field' => 'tid', 'sort' => 'desc'],
+      'pid' => ['data' => t('Person ID'), 'field' => 'pid'],
+      'task' => ['data' => t('Task'), 'field' => 'task'],
+      'priority' => ['data' => t('Priority'), 'field' => 'priority', ],
+    ];
 
     $query = db_select('test_task', 't');
     $query
-      ->fields('t', array('tid', 'pid', 'task', 'priority'));
+      ->fields('t', ['tid', 'pid', 'task', 'priority']);
 
     $query = $query
       ->extend('Drupal\Core\Database\Query\TableSortExtender')
@@ -105,9 +105,9 @@ public function testTablesort() {
     // We need all the results at once to check the sort.
     $tasks = $query->execute()->fetchAll();
 
-    return new JsonResponse(array(
+    return new JsonResponse([
       'tasks' => $tasks,
-    ));
+    ]);
   }
 
   /**
@@ -119,16 +119,16 @@ public function testTablesort() {
    * @return \Symfony\Component\HttpFoundation\JsonResponse
    */
   public function testTablesortFirst() {
-    $header = array(
-      'tid' => array('data' => t('Task ID'), 'field' => 'tid', 'sort' => 'desc'),
-      'pid' => array('data' => t('Person ID'), 'field' => 'pid'),
-      'task' => array('data' => t('Task'), 'field' => 'task'),
-      'priority' => array('data' => t('Priority'), 'field' => 'priority', ),
-    );
+    $header = [
+      'tid' => ['data' => t('Task ID'), 'field' => 'tid', 'sort' => 'desc'],
+      'pid' => ['data' => t('Person ID'), 'field' => 'pid'],
+      'task' => ['data' => t('Task'), 'field' => 'task'],
+      'priority' => ['data' => t('Priority'), 'field' => 'priority', ],
+    ];
 
     $query = db_select('test_task', 't');
     $query
-      ->fields('t', array('tid', 'pid', 'task', 'priority'));
+      ->fields('t', ['tid', 'pid', 'task', 'priority']);
 
     $query = $query
       ->extend('Drupal\Core\Database\Query\TableSortExtender')
@@ -138,9 +138,9 @@ public function testTablesortFirst() {
     // We need all the results at once to check the sort.
     $tasks = $query->execute()->fetchAll();
 
-    return new JsonResponse(array(
+    return new JsonResponse([
       'tasks' => $tasks,
-    ));
+    ]);
   }
 
 }
diff --git a/core/modules/system/tests/modules/database_test/src/Form/DatabaseTestForm.php b/core/modules/system/tests/modules/database_test/src/Form/DatabaseTestForm.php
index 96125548bcc18418f78f6ec0f830f25a2cd6f62a..12eebccab638a4d9cb8bc31768034c1b60b8b3e8 100644
--- a/core/modules/system/tests/modules/database_test/src/Form/DatabaseTestForm.php
+++ b/core/modules/system/tests/modules/database_test/src/Form/DatabaseTestForm.php
@@ -22,10 +22,10 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $header = array(
-      'username' => array('data' => t('Username'), 'field' => 'u.name'),
-      'status' => array('data' => t('Status'), 'field' => 'u.status'),
-    );
+    $header = [
+      'username' => ['data' => t('Username'), 'field' => 'u.name'],
+      'status' => ['data' => t('Status'), 'field' => 'u.status'],
+    ];
 
     $query = db_select('users_field_data', 'u');
     $query->condition('u.uid', 0, '<>');
@@ -38,7 +38,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender')
       ->extend('Drupal\Core\Database\Query\TableSortExtender');
     $query
-      ->fields('u', array('uid'))
+      ->fields('u', ['uid'])
       ->limit(50)
       ->orderByHeader($header)
       ->setCountQuery($count_query);
@@ -46,22 +46,22 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       ->execute()
       ->fetchCol();
 
-    $options = array();
+    $options = [];
 
     foreach (User::loadMultiple($uids) as $account) {
-      $options[$account->id()] = array(
-        'title' => array('data' => array('#title' => $account->getUsername())),
+      $options[$account->id()] = [
+        'title' => ['data' => ['#title' => $account->getUsername()]],
         'username' => $account->getUsername(),
         'status' => $account->isActive() ? t('active') : t('blocked'),
-      );
+      ];
     }
 
-    $form['accounts'] = array(
+    $form['accounts'] = [
       '#type' => 'tableselect',
       '#header' => $header,
       '#options' => $options,
       '#empty' => t('No people available.'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/display_variant_test/src/EventSubscriber/TestPageDisplayVariantSubscriber.php b/core/modules/system/tests/modules/display_variant_test/src/EventSubscriber/TestPageDisplayVariantSubscriber.php
index 3768bcdf9761d30ab91f380934865b65eb0bb865..acfed444c4ad11688e4f25fbd8182ae3703c6f4a 100644
--- a/core/modules/system/tests/modules/display_variant_test/src/EventSubscriber/TestPageDisplayVariantSubscriber.php
+++ b/core/modules/system/tests/modules/display_variant_test/src/EventSubscriber/TestPageDisplayVariantSubscriber.php
@@ -32,7 +32,7 @@ public function onSelectPageDisplayVariant(PageDisplayVariantSelectionEvent $eve
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[RenderEvents::SELECT_PAGE_DISPLAY_VARIANT][] = array('onSelectPageDisplayVariant');
+    $events[RenderEvents::SELECT_PAGE_DISPLAY_VARIANT][] = ['onSelectPageDisplayVariant'];
     return $events;
   }
 
diff --git a/core/modules/system/tests/modules/entity_reference_test/entity_reference_test.module b/core/modules/system/tests/modules/entity_reference_test/entity_reference_test.module
index 51b506b5dde8bb0187fcbbc506fa1d47e47d8224..5ae4fcbbf15c8693c22e4b1a987c7496c21b337a 100644
--- a/core/modules/system/tests/modules/entity_reference_test/entity_reference_test.module
+++ b/core/modules/system/tests/modules/entity_reference_test/entity_reference_test.module
@@ -12,7 +12,7 @@
  * Implements hook_entity_base_field_info().
  */
 function entity_reference_test_entity_base_field_info(EntityTypeInterface $entity_type) {
-  $fields = array();
+  $fields = [];
 
   if ($entity_type->id() === 'entity_test') {
     $fields['user_role'] = BaseFieldDefinition::create('entity_reference')
@@ -33,10 +33,10 @@ function entity_reference_test_entity_base_field_info_alter(&$fields, EntityType
     // Allow user_id field to use configurable widget.
     $fields['user_id']
       ->setSetting('handler', 'default')
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'entity_reference_autocomplete',
         'weight' => 0,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
   }
 }
diff --git a/core/modules/system/tests/modules/entity_test/entity_test.install b/core/modules/system/tests/modules/entity_test/entity_test.install
index 5e3bcaa2a130fbd439de1603162933f53e5db797..c796c9adcbce6ed2118cf14b6cc47ef962bdfa59 100644
--- a/core/modules/system/tests/modules/entity_test/entity_test.install
+++ b/core/modules/system/tests/modules/entity_test/entity_test.install
@@ -15,12 +15,12 @@
 function entity_test_install() {
   foreach (entity_test_entity_types() as $entity_type) {
     // Auto-create fields for testing.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'entity_type' => $entity_type,
       'field_name' => 'field_test_text',
       'type' => 'text',
       'cardinality' => 1,
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => $entity_type,
       'field_name' => 'field_test_text',
@@ -30,7 +30,7 @@ function entity_test_install() {
     ])->save();
 
     entity_get_form_display($entity_type, $entity_type, 'default')
-      ->setComponent('field_test_text', array('type' => 'text_textfield'))
+      ->setComponent('field_test_text', ['type' => 'text_textfield'])
       ->save();
   }
 }
@@ -40,17 +40,17 @@ function entity_test_install() {
  */
 function entity_test_schema() {
   // Schema for simple entity.
-  $schema['entity_test_example'] = array(
+  $schema['entity_test_example'] = [
     'description' => 'Stores entity_test items.',
-    'fields' => array(
-      'id' => array(
+    'fields' => [
+      'id' => [
         'type' => 'serial',
         'not null' => TRUE,
         'description' => 'Primary Key: Unique entity-test item ID.',
-      ),
-    ),
-    'primary key' => array('id'),
-  );
+      ],
+    ],
+    'primary key' => ['id'],
+  ];
   return $schema;
 }
 
diff --git a/core/modules/system/tests/modules/entity_test/entity_test.module b/core/modules/system/tests/modules/entity_test/entity_test.module
index cf1a63ccfecd5e8c62c979f7974e42dad6503ac7..3a7a51dde7f2f7508eeae455e1a0498b11f53ce3 100644
--- a/core/modules/system/tests/modules/entity_test/entity_test.module
+++ b/core/modules/system/tests/modules/entity_test/entity_test.module
@@ -54,7 +54,7 @@
  *   List with entity_types.
  */
 function entity_test_entity_types($filter = NULL) {
-  $types = array();
+  $types = [];
   if ($filter === NULL || $filter === ENTITY_TEST_TYPES_ROUTING) {
     $types[] = 'entity_test';
   }
@@ -168,7 +168,7 @@ function entity_test_entity_base_field_info_alter(&$fields, EntityTypeInterface
  */
 function entity_test_entity_field_storage_info(EntityTypeInterface $entity_type) {
   if ($entity_type->id() == 'entity_test_update') {
-    return \Drupal::state()->get('entity_test_update.additional_field_storage_definitions', array());
+    return \Drupal::state()->get('entity_test_update.additional_field_storage_definitions', []);
   }
 }
 
@@ -185,8 +185,8 @@ function entity_test_entity_field_storage_info(EntityTypeInterface $entity_type)
  *   'entity_test'.
  */
 function entity_test_create_bundle($bundle, $text = NULL, $entity_type = 'entity_test') {
-  $bundles = \Drupal::state()->get($entity_type . '.bundles') ?: array($entity_type => array('label' => 'Entity Test Bundle'));
-  $bundles += array($bundle => array('label' => $text ? $text : $bundle));
+  $bundles = \Drupal::state()->get($entity_type . '.bundles') ?: [$entity_type => ['label' => 'Entity Test Bundle']];
+  $bundles += [$bundle => ['label' => $text ? $text : $bundle]];
   \Drupal::state()->set($entity_type . '.bundles', $bundles);
 
   \Drupal::entityManager()->onBundleCreate($bundle, $entity_type);
@@ -202,7 +202,7 @@ function entity_test_create_bundle($bundle, $text = NULL, $entity_type = 'entity
  *   'entity_test'.
  */
 function entity_test_delete_bundle($bundle, $entity_type = 'entity_test') {
-  $bundles = \Drupal::state()->get($entity_type . '.bundles') ?: array($entity_type => array('label' => 'Entity Test Bundle'));
+  $bundles = \Drupal::state()->get($entity_type . '.bundles') ?: [$entity_type => ['label' => 'Entity Test Bundle']];
   unset($bundles[$bundle]);
   \Drupal::state()->set($entity_type . '.bundles', $bundles);
 
@@ -213,11 +213,11 @@ function entity_test_delete_bundle($bundle, $entity_type = 'entity_test') {
  * Implements hook_entity_bundle_info().
  */
 function entity_test_entity_bundle_info() {
-  $bundles = array();
+  $bundles = [];
   $entity_types = \Drupal::entityManager()->getDefinitions();
   foreach ($entity_types as $entity_type_id => $entity_type) {
     if ($entity_type->getProvider() == 'entity_test' && $entity_type_id != 'entity_test_with_bundle') {
-      $bundles[$entity_type_id] = \Drupal::state()->get($entity_type_id . '.bundles') ?: array($entity_type_id => array('label' => 'Entity Test Bundle'));
+      $bundles[$entity_type_id] = \Drupal::state()->get($entity_type_id . '.bundles') ?: [$entity_type_id => ['label' => 'Entity Test Bundle']];
     }
   }
   return $bundles;
@@ -230,18 +230,18 @@ function entity_test_entity_view_mode_info_alter(&$view_modes) {
   $entity_info = \Drupal::entityManager()->getDefinitions();
   foreach ($entity_info as $entity_type => $info) {
     if ($entity_info[$entity_type]->getProvider() == 'entity_test' && !isset($view_modes[$entity_type])) {
-      $view_modes[$entity_type] = array(
-        'full' => array(
+      $view_modes[$entity_type] = [
+        'full' => [
           'label' => t('Full object'),
           'status' => TRUE,
           'cache' => TRUE,
-        ),
-        'teaser' => array(
+        ],
+        'teaser' => [
           'label' => t('Teaser'),
           'status' => TRUE,
           'cache' => TRUE,
-        ),
-      );
+        ],
+      ];
     }
   }
 }
@@ -253,12 +253,12 @@ function entity_test_entity_form_mode_info_alter(&$form_modes) {
   $entity_info = \Drupal::entityManager()->getDefinitions();
   foreach ($entity_info as $entity_type => $info) {
     if ($entity_info[$entity_type]->getProvider() == 'entity_test') {
-      $form_modes[$entity_type] = array(
-        'compact' => array(
+      $form_modes[$entity_type] = [
+        'compact' => [
           'label' => t('Compact version'),
           'status' => TRUE,
-        ),
-      );
+        ],
+      ];
     }
   }
 }
@@ -267,24 +267,24 @@ function entity_test_entity_form_mode_info_alter(&$form_modes) {
  * Implements hook_entity_extra_field_info().
  */
 function entity_test_entity_extra_field_info() {
-  $extra['entity_test']['bundle_with_extra_fields'] = array(
-    'display' => array(
+  $extra['entity_test']['bundle_with_extra_fields'] = [
+    'display' => [
       // Note: those extra fields do not currently display anything, they are
       // just used in \Drupal\Tests\field_ui\Kernel\EntityDisplayTest to test
       // the behavior of entity display objects.
-      'display_extra_field' => array(
+      'display_extra_field' => [
         'label' => t('Display extra field'),
         'description' => t('An extra field on the display side.'),
         'weight' => 5,
         'visible' => TRUE,
-      ),
-      'display_extra_field_hidden' => array(
+      ],
+      'display_extra_field_hidden' => [
         'label' => t('Display extra field (hidden)'),
         'description' => t('An extra field on the display side, hidden by default.'),
         'visible' => FALSE,
-      ),
-    )
-  );
+      ],
+    ]
+  ];
 
   return $extra;
 }
@@ -676,16 +676,16 @@ function entity_test_field_default_value(FieldableEntityInterface $entity, Field
   // that they are correctly passed.
   $string = $definition->getName() . '_' . $entity->language()->getId();
   // Return a "default value" with multiple items.
-  return array(
-    array(
+  return [
+    [
       'shape' => "shape:0:$string",
       'color' => "color:0:$string",
-    ),
-    array(
+    ],
+    [
       'shape' => "shape:1:$string",
       'color' => "color:1:$string",
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -715,7 +715,7 @@ function entity_test_entity_prepare_view($entity_type, array $entities, array $d
       // Add a dummy field item attribute on field_test_text if it exists.
       if ($entity->hasField('field_test_text') && $displays[$entity->bundle()]->getComponent('field_test_text')) {
         foreach ($entity->get('field_test_text') as $item) {
-          $item->_attributes += array('data-field-item-attr' => 'foobar');
+          $item->_attributes += ['data-field-item-attr' => 'foobar'];
         }
       }
 
@@ -724,7 +724,7 @@ function entity_test_entity_prepare_view($entity_type, array $entities, array $d
       foreach ($fields as $field) {
         if ($field->getType() === 'daterange') {
           $item = $entity->get($field->getName());
-          $item->_attributes += array('data-field-item-attr' => 'foobar');
+          $item->_attributes += ['data-field-item-attr' => 'foobar'];
         }
       }
     }
diff --git a/core/modules/system/tests/modules/entity_test/src/Controller/EntityTestController.php b/core/modules/system/tests/modules/entity_test/src/Controller/EntityTestController.php
index d0cd895bf998b65377d8b6616cb14e794d36d208..a69348849f44935b219b534160be28277f0faa75 100644
--- a/core/modules/system/tests/modules/entity_test/src/Controller/EntityTestController.php
+++ b/core/modules/system/tests/modules/entity_test/src/Controller/EntityTestController.php
@@ -38,7 +38,7 @@ public function listReferencingEntities($entity_reference_field_name, $reference
       ->getStorage($referenced_entity_type)
       ->load($referenced_entity_id);
     if ($referenced_entity === NULL) {
-      return array();
+      return [];
     }
 
     $query = $this->entityTypeManager()->getStorage('entity_test')->getQuery()
diff --git a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTest.php b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTest.php
index a603f5379438ba147d936f9685cbf330f28209cf..f3ada1f6dfb808e0a86879181a1cdbbd17f4477e 100644
--- a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTest.php
+++ b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTest.php
@@ -72,15 +72,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setDescription(t('The name of the test entity.'))
       ->setTranslatable(TRUE)
       ->setSetting('max_length', 32)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'string',
         'weight' => -5,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -5,
-      ));
+      ]);
 
     $fields['created'] = BaseFieldDefinition::create('created')
       ->setLabel(t('Authored on'))
@@ -94,17 +94,17 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setSetting('handler', 'default')
       // Default EntityTest entities to have the root user as the owner, to
       // simplify testing.
-      ->setDefaultValue(array(0 => array('target_id' => 1)))
+      ->setDefaultValue([0 => ['target_id' => 1]])
       ->setTranslatable(TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'entity_reference_autocomplete',
         'weight' => -1,
-        'settings' => array(
+        'settings' => [
           'match_operator' => 'CONTAINS',
           'size' => '60',
           'placeholder' => '',
-        ),
-      ));
+        ],
+      ]);
 
     return $fields;
   }
diff --git a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestBaseFieldDisplay.php b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestBaseFieldDisplay.php
index f7fe8e643c6f567123202c39c4cc585b9caa0f40..7fe9ce2112c488f1a3b940701632380c03af38c4 100644
--- a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestBaseFieldDisplay.php
+++ b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestBaseFieldDisplay.php
@@ -53,39 +53,39 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
 
     $fields['test_display_configurable'] = BaseFieldDefinition::create('text')
       ->setLabel(t('Field with configurable display'))
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'type' => 'text_default',
         'weight' => 10,
-      ))
+      ])
       ->setDisplayConfigurable('view', TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'text_textfield',
         'weight' => 10,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['test_display_non_configurable'] = BaseFieldDefinition::create('text')
       ->setLabel(t('Field with non-configurable display'))
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'type' => 'text_default',
         'weight' => 11,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'text_textfield',
         'weight' => 11,
-      ));
+      ]);
 
     $fields['test_display_multiple'] = BaseFieldDefinition::create('text')
       ->setLabel(t('A field with multiple values'))
       ->setCardinality(FieldStorageDefinition::CARDINALITY_UNLIMITED)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'type' => 'text_default',
         'weight' => 12,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'text_textfield',
         'weight' => 12,
-      ));
+      ]);
 
     return $fields;
   }
diff --git a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestCompositeConstraint.php b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestCompositeConstraint.php
index a8158b00a6758a9ac8654786b70ae91ac85f10bb..bd28b346b869b4ad2f3f677fafa632a44e7d1060 100644
--- a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestCompositeConstraint.php
+++ b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestCompositeConstraint.php
@@ -36,15 +36,15 @@ class EntityTestCompositeConstraint extends EntityTest {
   public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields = parent::baseFieldDefinitions($entity_type);
 
-    $fields['name']->setDisplayOptions('form', array(
+    $fields['name']->setDisplayOptions('form', [
       'type' => 'string',
       'weight' => 0,
-    ));
+    ]);
 
-    $fields['type']->setDisplayOptions('form', array(
+    $fields['type']->setDisplayOptions('form', [
       'type' => 'entity_reference_autocomplete',
       'weight' => 0,
-    ));
+    ]);
 
     return $fields;
   }
diff --git a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestConstraintViolation.php b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestConstraintViolation.php
index 448718dc8ec033961572b22a92ea659b25397c3c..e12c74a0d152584e5f06bfbe883a7b24485cf9d6 100644
--- a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestConstraintViolation.php
+++ b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestConstraintViolation.php
@@ -33,11 +33,11 @@ class EntityTestConstraintViolation extends EntityTest {
   public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields = parent::baseFieldDefinitions($entity_type);
 
-    $fields['name']->setDisplayOptions('form', array(
+    $fields['name']->setDisplayOptions('form', [
       'type' => 'string',
       'weight' => 0,
-    ));
-    $fields['name']->addConstraint('FieldWidgetConstraint', array());
+    ]);
+    $fields['name']->addConstraint('FieldWidgetConstraint', []);
 
     return $fields;
   }
diff --git a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestUpdate.php b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestUpdate.php
index 6cf0d5ca8482191bcfc0203188073b832da47808..6d72f7aeac985b1bb6ce5f12549ab977c0c592cb 100644
--- a/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestUpdate.php
+++ b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestUpdate.php
@@ -35,7 +35,7 @@ class EntityTestUpdate extends EntityTestRev {
    */
   public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields = parent::baseFieldDefinitions($entity_type);
-    $fields += \Drupal::state()->get('entity_test_update.additional_base_field_definitions', array());
+    $fields += \Drupal::state()->get('entity_test_update.additional_base_field_definitions', []);
     return $fields;
   }
 
@@ -44,7 +44,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
    */
   public static function bundleFieldDefinitions(EntityTypeInterface $entity_type, $bundle, array $base_field_definitions) {
     $fields = parent::bundleFieldDefinitions($entity_type, $bundle, $base_field_definitions);
-    $fields += \Drupal::state()->get('entity_test_update.additional_bundle_field_definitions.' . $bundle, array());
+    $fields += \Drupal::state()->get('entity_test_update.additional_bundle_field_definitions.' . $bundle, []);
     return $fields;
   }
 
diff --git a/core/modules/system/tests/modules/entity_test/src/EntityTestAccessControlHandler.php b/core/modules/system/tests/modules/entity_test/src/EntityTestAccessControlHandler.php
index 22816667e4e28bd8332a57699b7f411993a59c5f..1bd49ddaa3c27cab081cc5cd3fc0da583a4bbb46 100644
--- a/core/modules/system/tests/modules/entity_test/src/EntityTestAccessControlHandler.php
+++ b/core/modules/system/tests/modules/entity_test/src/EntityTestAccessControlHandler.php
@@ -45,13 +45,13 @@ protected function checkAccess(EntityInterface $entity, $operation, AccountInter
       // Viewing the label of the 'entity_test_label' entity type is allowed.
       return AccessResult::allowed();
     }
-    elseif (in_array($operation, array('view', 'view label'))) {
+    elseif (in_array($operation, ['view', 'view label'])) {
       if (!$entity->isDefaultTranslation()) {
         return AccessResult::allowedIfHasPermission($account, 'view test entity translations');
       }
       return AccessResult::allowedIfHasPermission($account, 'view test entity');
     }
-    elseif (in_array($operation, array('update', 'delete'))) {
+    elseif (in_array($operation, ['update', 'delete'])) {
       return AccessResult::allowedIfHasPermission($account, 'administer entity_test content');
     }
 
diff --git a/core/modules/system/tests/modules/entity_test/src/EntityTestForm.php b/core/modules/system/tests/modules/entity_test/src/EntityTestForm.php
index 7e4caff4d066b2c63a54fde4a83eecc15bbb5220..e4c51143c85a3f0947a669a23c63cf0f9445afcf 100644
--- a/core/modules/system/tests/modules/entity_test/src/EntityTestForm.php
+++ b/core/modules/system/tests/modules/entity_test/src/EntityTestForm.php
@@ -32,11 +32,11 @@ public function form(array $form, FormStateInterface $form_state) {
 
     // @todo: Is there a better way to check if an entity type is revisionable?
     if ($entity->getEntityType()->hasKey('revision') && !$entity->isNew()) {
-      $form['revision'] = array(
+      $form['revision'] = [
         '#type' => 'checkbox',
         '#title' => t('Create new revision'),
         '#default_value' => $entity->isNewRevision(),
-      );
+      ];
     }
 
     return $form;
@@ -58,10 +58,10 @@ public function save(array $form, FormStateInterface $form_state) {
       $entity->save();
 
       if ($is_new) {
-        $message = t('%entity_type @id has been created.', array('@id' => $entity->id(), '%entity_type' => $entity->getEntityTypeId()));
+        $message = t('%entity_type @id has been created.', ['@id' => $entity->id(), '%entity_type' => $entity->getEntityTypeId()]);
       }
       else {
-        $message = t('%entity_type @id has been updated.', array('@id' => $entity->id(), '%entity_type' => $entity->getEntityTypeId()));
+        $message = t('%entity_type @id has been updated.', ['@id' => $entity->id(), '%entity_type' => $entity->getEntityTypeId()]);
       }
       drupal_set_message($message);
 
@@ -69,7 +69,7 @@ public function save(array $form, FormStateInterface $form_state) {
         $entity_type = $entity->getEntityTypeId();
         $form_state->setRedirect(
           "entity.$entity_type.edit_form",
-          array($entity_type => $entity->id())
+          [$entity_type => $entity->id()]
         );
       }
       else {
diff --git a/core/modules/system/tests/modules/entity_test/src/EntityTestStorageSchema.php b/core/modules/system/tests/modules/entity_test/src/EntityTestStorageSchema.php
index 67a13bdd045c2e06e9f816704d835885023b061f..bdd36dbb29b0a9d70dc15c6ae3c6baf6a12e2c57 100644
--- a/core/modules/system/tests/modules/entity_test/src/EntityTestStorageSchema.php
+++ b/core/modules/system/tests/modules/entity_test/src/EntityTestStorageSchema.php
@@ -18,7 +18,7 @@ protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $res
     $schema = parent::getEntitySchema($entity_type, $reset);
 
     if ($entity_type->id() == 'entity_test_update') {
-      $schema[$entity_type->getBaseTable()]['indexes'] += \Drupal::state()->get('entity_test_update.additional_entity_indexes', array());
+      $schema[$entity_type->getBaseTable()]['indexes'] += \Drupal::state()->get('entity_test_update.additional_entity_indexes', []);
     }
     return $schema;
   }
diff --git a/core/modules/system/tests/modules/entity_test/src/EntityTestViewBuilder.php b/core/modules/system/tests/modules/entity_test/src/EntityTestViewBuilder.php
index 720e3c3b8d6564e26afc6e23d0825cf7be35bc5f..e90a22700e304ab7570b67ef7f0736b69c1f224e 100644
--- a/core/modules/system/tests/modules/entity_test/src/EntityTestViewBuilder.php
+++ b/core/modules/system/tests/modules/entity_test/src/EntityTestViewBuilder.php
@@ -18,18 +18,18 @@ public function buildComponents(array &$build, array $entities, array $displays,
     parent::buildComponents($build, $entities, $displays, $view_mode);
 
     foreach ($entities as $id => $entity) {
-      $build[$id]['label'] = array(
+      $build[$id]['label'] = [
         '#weight' => -100,
         '#plain_text' => $entity->label(),
-      );
-      $build[$id]['separator'] = array(
+      ];
+      $build[$id]['separator'] = [
         '#weight' => -150,
         '#markup' => ' | ',
-      );
-      $build[$id]['view_mode'] = array(
+      ];
+      $build[$id]['view_mode'] = [
         '#weight' => -200,
         '#plain_text' => $view_mode,
-      );
+      ];
     }
   }
 
diff --git a/core/modules/system/tests/modules/entity_test/src/Plugin/Derivative/EntityTestLocalTasks.php b/core/modules/system/tests/modules/entity_test/src/Plugin/Derivative/EntityTestLocalTasks.php
index 059c3a9f4f1964b8b2abf73809dda4dc2561aeda..ed3f1dc4315ce8963529bca60b2fbd8db1b3d439 100644
--- a/core/modules/system/tests/modules/entity_test/src/Plugin/Derivative/EntityTestLocalTasks.php
+++ b/core/modules/system/tests/modules/entity_test/src/Plugin/Derivative/EntityTestLocalTasks.php
@@ -13,16 +13,16 @@ class EntityTestLocalTasks extends DeriverBase {
    * {@inheritdoc}
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    $this->derivatives = array();
+    $this->derivatives = [];
     $types = entity_test_entity_types(ENTITY_TEST_TYPES_ROUTING);
 
     foreach ($types as $entity_type) {
-      $this->derivatives[$entity_type . '.canonical'] = array();
+      $this->derivatives[$entity_type . '.canonical'] = [];
       $this->derivatives[$entity_type . '.canonical']['base_route'] = "entity.$entity_type.canonical";
       $this->derivatives[$entity_type . '.canonical']['route_name'] = "entity.$entity_type.canonical";
       $this->derivatives[$entity_type . '.canonical']['title'] = 'View';
 
-      $this->derivatives[$entity_type . '.edit'] = array();
+      $this->derivatives[$entity_type . '.edit'] = [];
       $this->derivatives[$entity_type . '.edit']['base_route'] = "entity.$entity_type.canonical";
       $this->derivatives[$entity_type . '.edit']['route_name'] = "entity.$entity_type.edit_form";
       $this->derivatives[$entity_type . '.edit']['title'] = 'Edit';
diff --git a/core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/FieldTestItem.php b/core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/FieldTestItem.php
index 2310ffdd37a38b922ab53d1442d9683302859ca8..df2b89b592d5dad2f3389e5e09a2fbd3fd5605c6 100644
--- a/core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/FieldTestItem.php
+++ b/core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/FieldTestItem.php
@@ -46,14 +46,14 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => 255,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/ShapeItem.php b/core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/ShapeItem.php
index 0d2ebb9d6aa9bed3f8642672751ae901b8c24bd3..4921dcf481ea1eb7bed84fb3a0f1bdf69580f3fb 100644
--- a/core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/ShapeItem.php
+++ b/core/modules/system/tests/modules/entity_test/src/Plugin/Field/FieldType/ShapeItem.php
@@ -21,9 +21,9 @@ class ShapeItem extends FieldItemBase {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'foreign_key_name' => 'shape',
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
@@ -43,30 +43,30 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    $foreign_keys = array();
+    $foreign_keys = [];
     // The 'foreign keys' key is not always used in tests.
     if ($field_definition->getSetting('foreign_key_name')) {
-      $foreign_keys['foreign keys'] = array(
+      $foreign_keys['foreign keys'] = [
         // This is a dummy foreign key definition, references a table that
         // doesn't exist, but that's not a problem.
-        $field_definition->getSetting('foreign_key_name') => array(
+        $field_definition->getSetting('foreign_key_name') => [
           'table' => $field_definition->getSetting('foreign_key_name'),
-          'columns' => array($field_definition->getSetting('foreign_key_name') => 'id'),
-        ),
-      );
+          'columns' => [$field_definition->getSetting('foreign_key_name') => 'id'],
+        ],
+      ];
     }
-    return array(
-      'columns' => array(
-        'shape' => array(
+    return [
+      'columns' => [
+        'shape' => [
           'type' => 'varchar',
           'length' => 32,
-        ),
-        'color' => array(
+        ],
+        'color' => [
           'type' => 'varchar',
           'length' => 32,
-        ),
-      ),
-    ) + $foreign_keys;
+        ],
+      ],
+    ] + $foreign_keys;
   }
 
   /**
diff --git a/core/modules/system/tests/modules/entity_test/src/Routing/EntityTestRoutes.php b/core/modules/system/tests/modules/entity_test/src/Routing/EntityTestRoutes.php
index d75d359596969aa9ab507d5a7e33a468899408b9..5732060d9a9b9788c45f24c150ede0415dd3ad10 100644
--- a/core/modules/system/tests/modules/entity_test/src/Routing/EntityTestRoutes.php
+++ b/core/modules/system/tests/modules/entity_test/src/Routing/EntityTestRoutes.php
@@ -18,13 +18,13 @@ class EntityTestRoutes {
   public function routes() {
     $types = entity_test_entity_types(ENTITY_TEST_TYPES_ROUTING);
 
-    $routes = array();
+    $routes = [];
     foreach ($types as $entity_type_id) {
       $routes["entity.$entity_type_id.admin_form"] = new Route(
         "$entity_type_id/structure/{bundle}",
-        array('_controller' => '\Drupal\entity_test\Controller\EntityTestController::testAdmin'),
-        array('_permission' => 'administer entity_test content'),
-        array('_admin_route' => TRUE)
+        ['_controller' => '\Drupal\entity_test\Controller\EntityTestController::testAdmin'],
+        ['_permission' => 'administer entity_test content'],
+        ['_admin_route' => TRUE]
       );
     }
     return $routes;
diff --git a/core/modules/system/tests/modules/entity_test_extra/entity_test_extra.module b/core/modules/system/tests/modules/entity_test_extra/entity_test_extra.module
index d55aab3ca42cbb11768b0f0083747927b9f1e8b6..f399ae4b978747d65f34dd16672c4182ca6beec4 100644
--- a/core/modules/system/tests/modules/entity_test_extra/entity_test_extra.module
+++ b/core/modules/system/tests/modules/entity_test_extra/entity_test_extra.module
@@ -11,19 +11,19 @@
  * Implements hook_entity_base_field_info().
  */
 function entity_test_extra_entity_base_field_info(EntityTypeInterface $entity_type) {
-  return \Drupal::state()->get($entity_type->id() . '.additional_base_field_definitions', array());
+  return \Drupal::state()->get($entity_type->id() . '.additional_base_field_definitions', []);
 }
 
 /**
  * Implements hook_entity_field_storage_info().
  */
 function entity_test_extra_entity_field_storage_info(EntityTypeInterface $entity_type) {
-  return \Drupal::state()->get($entity_type->id() . '.additional_field_storage_definitions', array());
+  return \Drupal::state()->get($entity_type->id() . '.additional_field_storage_definitions', []);
 }
 
 /**
  * Implements hook_entity_bundle_field_info().
  */
 function entity_test_extra_entity_bundle_field_info(EntityTypeInterface $entity_type, $bundle, array $base_field_definitions) {
-  return \Drupal::state()->get($entity_type->id() . '.' . $bundle . '.additional_bundle_field_definitions', array());
+  return \Drupal::state()->get($entity_type->id() . '.' . $bundle . '.additional_bundle_field_definitions', []);
 }
diff --git a/core/modules/system/tests/modules/entity_test_revlog/src/Entity/EntityTestWithRevisionLog.php b/core/modules/system/tests/modules/entity_test_revlog/src/Entity/EntityTestWithRevisionLog.php
index 8d9b4d1c56bff2ae7b1466f1931f484f15b74ced..b03415ff58adcc7d96df8446ac620dc27852d091 100644
--- a/core/modules/system/tests/modules/entity_test_revlog/src/Entity/EntityTestWithRevisionLog.php
+++ b/core/modules/system/tests/modules/entity_test_revlog/src/Entity/EntityTestWithRevisionLog.php
@@ -43,15 +43,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setTranslatable(TRUE)
       ->setRevisionable(TRUE)
       ->setSetting('max_length', 32)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'string',
         'weight' => -5,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -5,
-      ));
+      ]);
 
     return $fields;
   }
diff --git a/core/modules/system/tests/modules/error_service_test/src/Logger/TestLog.php b/core/modules/system/tests/modules/error_service_test/src/Logger/TestLog.php
index 579d71f8c2067d334f1927516958a9d8fa6aac84..3f18bb9437a178532464144a33e2c48dbc75f602 100644
--- a/core/modules/system/tests/modules/error_service_test/src/Logger/TestLog.php
+++ b/core/modules/system/tests/modules/error_service_test/src/Logger/TestLog.php
@@ -16,7 +16,7 @@ class TestLog implements LoggerInterface {
   /**
    * {@inheritdoc}
    */
-  public function log($level, $message, array $context = array()) {
+  public function log($level, $message, array $context = []) {
     $trigger = [
       '%type' => 'Exception',
       '@message' => 'Deforestation',
diff --git a/core/modules/system/tests/modules/form_test/form_test.module b/core/modules/system/tests/modules/form_test/form_test.module
index 7114a29ca698063895cdea088fc2953a9d4214b9..e3a5e3f28122943c4a370eb2232fb7d535ed239c 100644
--- a/core/modules/system/tests/modules/form_test/form_test.module
+++ b/core/modules/system/tests/modules/form_test/form_test.module
@@ -41,49 +41,49 @@ function system_form_form_test_alter_form_alter(&$form, FormStateInterface $form
  * Create a header and options array. Helper function for callbacks.
  */
 function _form_test_tableselect_get_data() {
-  $header = array(
+  $header = [
     'one' => t('One'),
     'two' => t('Two'),
     'three' => t('Three'),
     'four' => t('Four'),
-  );
+  ];
 
-  $options['row1'] = array(
-    'title' => array('data' => array('#title' => t('row1'))),
+  $options['row1'] = [
+    'title' => ['data' => ['#title' => t('row1')]],
     'one' => 'row1col1',
     'two' => t('row1col2'),
     'three' => t('row1col3'),
     'four' => t('row1col4'),
-  );
+  ];
 
-  $options['row2'] = array(
-    'title' => array('data' => array('#title' => t('row2'))),
+  $options['row2'] = [
+    'title' => ['data' => ['#title' => t('row2')]],
     'one' => 'row2col1',
     'two' => t('row2col2'),
     'three' => t('row2col3'),
     'four' => t('row2col4'),
-  );
+  ];
 
-  $options['row3'] = array(
-    'title' => array('data' => array('#title' => t('row3'))),
+  $options['row3'] = [
+    'title' => ['data' => ['#title' => t('row3')]],
     'one' => 'row3col1',
     'two' => t('row3col2'),
     'three' => t('row3col3'),
     'four' => t('row3col4'),
-  );
+  ];
 
-  return array($header, $options);
+  return [$header, $options];
 }
 
 /**
  * Implements hook_form_FORM_ID_alter() for the registration form.
  */
 function form_test_form_user_register_form_alter(&$form, FormStateInterface $form_state) {
-  $form['test_rebuild'] = array(
+  $form['test_rebuild'] = [
     '#type' => 'submit',
     '#value' => t('Rebuild'),
-    '#submit' => array('form_test_user_register_form_rebuild'),
-  );
+    '#submit' => ['form_test_user_register_form_rebuild'],
+  ];
 }
 
 /**
diff --git a/core/modules/system/tests/modules/form_test/src/AutocompleteController.php b/core/modules/system/tests/modules/form_test/src/AutocompleteController.php
index acbfa4092381eef044e8f42b37648aa6f456610d..cc78a9c0c4ffb4d26f1a5b6de3e0a080e92cd347 100644
--- a/core/modules/system/tests/modules/form_test/src/AutocompleteController.php
+++ b/core/modules/system/tests/modules/form_test/src/AutocompleteController.php
@@ -16,7 +16,7 @@ class AutocompleteController {
    *   A JSON response.
    */
   public function autocomplete1() {
-    return new JsonResponse(array('key' => 'value'));
+    return new JsonResponse(['key' => 'value']);
   }
 
 }
diff --git a/core/modules/system/tests/modules/form_test/src/Callbacks.php b/core/modules/system/tests/modules/form_test/src/Callbacks.php
index 3bf07f3060f137a8db734ac13a0f920686c3934b..0310a37e52f611044db5fcff48b0c58d5ea58fdb 100644
--- a/core/modules/system/tests/modules/form_test/src/Callbacks.php
+++ b/core/modules/system/tests/modules/form_test/src/Callbacks.php
@@ -38,7 +38,7 @@ public function validateName(&$element, FormStateInterface $form_state) {
 
     if ($triggered) {
       // Output the element's value from $form_state.
-      drupal_set_message(t('@label value: @value', array('@label' => $element['#title'], '@value' => $form_state->getValue('name'))));
+      drupal_set_message(t('@label value: @value', ['@label' => $element['#title'], '@value' => $form_state->getValue('name')]));
 
       // Trigger a form validation error to see our changes.
       $form_state->setErrorByName('');
diff --git a/core/modules/system/tests/modules/form_test/src/ConfirmFormArrayPathTestForm.php b/core/modules/system/tests/modules/form_test/src/ConfirmFormArrayPathTestForm.php
index 8885836f2fcfab00cbc148c0a47b3a43b6ab0c3d..eaa0f2037eeff8554b990d55ed37b8562f635015 100644
--- a/core/modules/system/tests/modules/form_test/src/ConfirmFormArrayPathTestForm.php
+++ b/core/modules/system/tests/modules/form_test/src/ConfirmFormArrayPathTestForm.php
@@ -20,11 +20,11 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getCancelUrl() {
-    return new Url('form_test.route6', array(), array(
-      'query' => array(
+    return new Url('form_test.route6', [], [
+      'query' => [
         'destination' => 'admin/config',
-      ),
-    ));
+      ],
+    ]);
   }
 
   /**
diff --git a/core/modules/system/tests/modules/form_test/src/ConfirmFormTestForm.php b/core/modules/system/tests/modules/form_test/src/ConfirmFormTestForm.php
index d35c59d1ff712031e05699af237402210a2ce26c..917f9e0ef6d471dc3b719026a74176faaaa70cf8 100644
--- a/core/modules/system/tests/modules/form_test/src/ConfirmFormTestForm.php
+++ b/core/modules/system/tests/modules/form_test/src/ConfirmFormTestForm.php
@@ -57,7 +57,7 @@ public function getCancelText() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['element'] = array('#markup' => '<p>The ConfirmFormTestForm::buildForm() method was used for this form.</p>');
+    $form['element'] = ['#markup' => '<p>The ConfirmFormTestForm::buildForm() method was used for this form.</p>'];
 
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Controller/FormTestController.php b/core/modules/system/tests/modules/form_test/src/Controller/FormTestController.php
index 5d28bf253bfb2ff6ed03181c8d922a7ec1c8a1c1..4c9fbe2c8c2a93906cbd3080959b56638ce86bfd 100644
--- a/core/modules/system/tests/modules/form_test/src/Controller/FormTestController.php
+++ b/core/modules/system/tests/modules/form_test/src/Controller/FormTestController.php
@@ -20,12 +20,12 @@ class FormTestController extends ControllerBase {
    */
   public function twoFormInstances() {
     $user = $this->currentUser();
-    $values = array(
+    $values = [
       'uid' => $user->id(),
       'name' => $user->getUsername(),
       'type' => 'page',
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    );
+    ];
     $node1 = $this->entityManager()->getStorage('node')->create($values);
     $node2 = clone($node1);
     $return['node_form_1'] = $this->entityFormBuilder()->getForm($node1);
diff --git a/core/modules/system/tests/modules/form_test/src/EventSubscriber/FormTestEventSubscriber.php b/core/modules/system/tests/modules/form_test/src/EventSubscriber/FormTestEventSubscriber.php
index 15e4545f3d5be268776402a7946df7d03f683044..3fb97507a4e1338a48f3c859f18d47dbb3907328 100644
--- a/core/modules/system/tests/modules/form_test/src/EventSubscriber/FormTestEventSubscriber.php
+++ b/core/modules/system/tests/modules/form_test/src/EventSubscriber/FormTestEventSubscriber.php
@@ -39,8 +39,8 @@ public function onKernelResponse(FilterResponseEvent $event) {
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    $events[KernelEvents::REQUEST][] = array('onKernelRequest');
-    $events[KernelEvents::RESPONSE][] = array('onKernelResponse');
+    $events[KernelEvents::REQUEST][] = ['onKernelRequest'];
+    $events[KernelEvents::RESPONSE][] = ['onKernelResponse'];
     return $events;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestButtonClassForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestButtonClassForm.php
index 6870781db1341e993d2f27388ef34818537aa46f..4e3de3bb4768cee8393df9c5be8b65c89f31066d 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestButtonClassForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestButtonClassForm.php
@@ -21,16 +21,16 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['button'] = array(
+    $form['button'] = [
       '#type' => 'button',
       '#value' => 'test',
       '#button_type' => 'foo',
-    );
-    $form['delete'] = array(
+    ];
+    $form['delete'] = [
       '#type' => 'button',
       '#value' => 'Delete',
       '#button_type' => 'danger',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxForm.php
index 66f7d059fec95520af863b37811b2735b1d9a0c9..62220cc61a1a85aa982fbeeeeb521e2728afa52d 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxForm.php
@@ -20,65 +20,65 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     // A required checkbox.
-    $form['required_checkbox'] = array(
+    $form['required_checkbox'] = [
       '#type' => 'checkbox',
       '#required' => TRUE,
       '#title' => 'required_checkbox',
-    );
+    ];
 
     // A disabled checkbox should get its default value back.
-    $form['disabled_checkbox_on'] = array(
+    $form['disabled_checkbox_on'] = [
       '#type' => 'checkbox',
       '#disabled' => TRUE,
       '#return_value' => 'disabled_checkbox_on',
       '#default_value' => 'disabled_checkbox_on',
       '#title' => 'disabled_checkbox_on',
-    );
-    $form['disabled_checkbox_off'] = array(
+    ];
+    $form['disabled_checkbox_off'] = [
       '#type' => 'checkbox',
       '#disabled' => TRUE,
       '#return_value' => 'disabled_checkbox_off',
       '#default_value' => NULL,
       '#title' => 'disabled_checkbox_off',
-    );
+    ];
 
     // A checkbox is active when #default_value == #return_value.
-    $form['checkbox_on'] = array(
+    $form['checkbox_on'] = [
       '#type' => 'checkbox',
       '#return_value' => 'checkbox_on',
       '#default_value' => 'checkbox_on',
       '#title' => 'checkbox_on',
-    );
+    ];
 
     // But inactive in any other case.
-    $form['checkbox_off'] = array(
+    $form['checkbox_off'] = [
       '#type' => 'checkbox',
       '#return_value' => 'checkbox_off',
       '#default_value' => 'checkbox_on',
       '#title' => 'checkbox_off',
-    );
+    ];
 
     // Checkboxes with a #return_value of '0' are supported.
-    $form['zero_checkbox_on'] = array(
+    $form['zero_checkbox_on'] = [
       '#type' => 'checkbox',
       '#return_value' => '0',
       '#default_value' => '0',
       '#title' => 'zero_checkbox_on',
-    );
+    ];
 
     // In that case, passing a #default_value != '0'
     // means that the checkbox is off.
-    $form['zero_checkbox_off'] = array(
+    $form['zero_checkbox_off'] = [
       '#type' => 'checkbox',
       '#return_value' => '0',
       '#default_value' => '1',
       '#title' => 'zero_checkbox_off',
-    );
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxTypeJugglingForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxTypeJugglingForm.php
index eb48bfcbbdd8fc7250ba4e8e725ad8d0f52a42fa..ad0a86e8c81f9a2ecf01a2efe84c5bef9ee6717f 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxTypeJugglingForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxTypeJugglingForm.php
@@ -21,12 +21,12 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state, $default_value = NULL, $return_value = NULL) {
-    $form['checkbox'] = array(
+    $form['checkbox'] = [
       '#title' => t('Checkbox'),
       '#type' => 'checkbox',
       '#return_value' => $return_value,
       '#default_value' => $default_value,
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxesRadiosForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxesRadiosForm.php
index 7c412fec670787a309303309a2a857bb3c7496db..a1a45a0abb7c2d9a4d00735d70f04740597905ed 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxesRadiosForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxesRadiosForm.php
@@ -24,53 +24,53 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state, $customize = FALSE) {
     // Expand #type checkboxes, setting custom element properties for some but not
     // all options.
-    $form['checkboxes'] = array(
+    $form['checkboxes'] = [
       '#type' => 'checkboxes',
       '#title' => 'Checkboxes',
-      '#options' => array(
+      '#options' => [
         0 => 'Zero',
         'foo' => 'Foo',
         1 => 'One',
         'bar' => $this->t('<em>Bar - checkboxes</em>'),
         '>' => "<em>Special Char</em><script>alert('checkboxes');</script>",
-      ),
-    );
+      ],
+    ];
     if ($customize) {
-      $form['checkboxes'] += array(
-        'foo' => array(
+      $form['checkboxes'] += [
+        'foo' => [
           '#description' => 'Enable to foo.',
-        ),
-        1 => array(
+        ],
+        1 => [
           '#weight' => 10,
-        ),
-      );
+        ],
+      ];
     }
 
     // Expand #type radios, setting custom element properties for some but not
     // all options.
-    $form['radios'] = array(
+    $form['radios'] = [
       '#type' => 'radios',
       '#title' => 'Radios',
-      '#options' => array(
+      '#options' => [
         0 => 'Zero',
         'foo' => 'Foo',
         1 => 'One',
         'bar' => '<em>Bar - radios</em>',
         '>' => "<em>Special Char</em><script>alert('radios');</script>",
-      ),
-    );
+      ],
+    ];
     if ($customize) {
-      $form['radios'] += array(
-        'foo' => array(
+      $form['radios'] += [
+        'foo' => [
           '#description' => 'Enable to foo.',
-        ),
-        1 => array(
+        ],
+        1 => [
           '#weight' => 10,
-        ),
-      );
+        ],
+      ];
     }
 
-    $form['submit'] = array('#type' => 'submit', '#value' => 'Submit');
+    $form['submit'] = ['#type' => 'submit', '#value' => 'Submit'];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxesZeroForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxesZeroForm.php
index 2f2a38f387441666a4e2ea3750d9a4e373b12e31..59f81e95bda5f9a774eebc6079ec136dd56aeb9b 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxesZeroForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestCheckboxesZeroForm.php
@@ -23,27 +23,27 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state, $json = TRUE) {
     $form_state->set('json', $json);
-    $form['checkbox_off'] = array(
+    $form['checkbox_off'] = [
       '#title' => t('Checkbox off'),
       '#type' => 'checkboxes',
-      '#options' => array('foo', 'bar', 'baz'),
-    );
-    $form['checkbox_zero_default'] = array(
+      '#options' => ['foo', 'bar', 'baz'],
+    ];
+    $form['checkbox_zero_default'] = [
       '#title' => t('Zero default'),
       '#type' => 'checkboxes',
-      '#options' => array('foo', 'bar', 'baz'),
-      '#default_value' => array(0),
-    );
-    $form['checkbox_string_zero_default'] = array(
+      '#options' => ['foo', 'bar', 'baz'],
+      '#default_value' => [0],
+    ];
+    $form['checkbox_string_zero_default'] = [
       '#title' => t('Zero default (string)'),
       '#type' => 'checkboxes',
-      '#options' => array('foo', 'bar', 'baz'),
-      '#default_value' => array('0'),
-    );
-    $form['submit'] = array(
+      '#options' => ['foo', 'bar', 'baz'],
+      '#default_value' => ['0'],
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestClickedButtonForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestClickedButtonForm.php
index c6684db16bf501a8ed23d9327e835ab0457f3ba7..adab5bda00170141c2b7bd458cd61cf8a1522456 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestClickedButtonForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestClickedButtonForm.php
@@ -26,10 +26,10 @@ public function buildForm(array $form, FormStateInterface $form_state, $first =
     // submitted without any information identifying the button responsible for
     // the submission. In other browsers, the form is submitted as though the
     // first button were clicked.
-    $form['text'] = array(
+    $form['text'] = [
       '#title' => 'Text',
       '#type' => 'textfield',
-    );
+    ];
 
     // Loop through each path argument, adding buttons based on the information
     // in the argument. For example, if the path is
@@ -37,7 +37,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $first =
     // 'image_button', and a 'button' with #access=FALSE. This enables form.test
     // to test a variety of combinations.
     $i = 0;
-    $args = array($first, $second, $third);
+    $args = [$first, $second, $third];
     foreach ($args as $arg) {
       $name = 'button' . ++$i;
       // 's', 'b', or 'i' in the argument define the button type wanted.
@@ -54,10 +54,10 @@ public function buildForm(array $form, FormStateInterface $form_state, $first =
         $type = NULL;
       }
       if (isset($type)) {
-        $form[$name] = array(
+        $form[$name] = [
           '#type' => $type,
           '#name' => $name,
-        );
+        ];
         // Image buttons need a #src; the others need a #value.
         if ($type == 'image_button') {
           $form[$name]['#src'] = 'core/misc/druplicon.png';
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestColorForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestColorForm.php
index a9be1eaafcd2b15ac55d0a206e70e3f4db222a79..07638809e352657e07ab7806fe6bebca9fbecf5b 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestColorForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestColorForm.php
@@ -22,14 +22,14 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['color'] = array(
+    $form['color'] = [
       '#type' => 'color',
       '#title' => 'Color',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestDescriptionForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestDescriptionForm.php
index f7527af29c8890559a9bd20494239c071af40b8b..81120ad1459cf174dcf72a9b77625210c3de7dd5 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestDescriptionForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestDescriptionForm.php
@@ -23,26 +23,26 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['form_textfield_test_description_before'] = array(
+    $form['form_textfield_test_description_before'] = [
       '#type' => 'textfield',
       '#title' => 'Textfield test for description before element',
       '#description' => 'Textfield test for description before element',
       '#description_display' => 'before',
-    );
+    ];
 
-    $form['form_textfield_test_description_after'] = array(
+    $form['form_textfield_test_description_after'] = [
       '#type' => 'textfield',
       '#title' => 'Textfield test for description after element',
       '#description' => 'Textfield test for description after element',
       '#description_display' => 'after',
-    );
+    ];
 
-    $form['form_textfield_test_description_invisible'] = array(
+    $form['form_textfield_test_description_invisible'] = [
       '#type' => 'textfield',
       '#title' => 'Textfield test for visually-hidden description',
       '#description' => 'Textfield test for visually-hidden description',
       '#description_display' => 'invisible',
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestDisabledElementsForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestDisabledElementsForm.php
index 8ebbf83e902e40dec35af707196cc22864152fa2..56e6d2ee0fb6e9c3a4795f0a1333af31239b5618 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestDisabledElementsForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestDisabledElementsForm.php
@@ -24,101 +24,101 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     // Elements that take a simple default value.
-    foreach (array('textfield', 'textarea', 'search', 'tel', 'hidden') as $type) {
-      $form[$type] = array(
+    foreach (['textfield', 'textarea', 'search', 'tel', 'hidden'] as $type) {
+      $form[$type] = [
         '#type' => $type,
         '#title' => $type,
         '#default_value' => $type,
         '#test_hijack_value' => 'HIJACK',
         '#disabled' => TRUE,
-      );
+      ];
     }
 
     // Multiple values option elements.
-    foreach (array('checkboxes', 'select') as $type) {
-      $form[$type . '_multiple'] = array(
+    foreach (['checkboxes', 'select'] as $type) {
+      $form[$type . '_multiple'] = [
         '#type' => $type,
         '#title' => $type . ' (multiple)',
-        '#options' => array(
+        '#options' => [
           'test_1' => 'Test 1',
           'test_2' => 'Test 2',
-        ),
+        ],
         '#multiple' => TRUE,
-        '#default_value' => array('test_2' => 'test_2'),
+        '#default_value' => ['test_2' => 'test_2'],
         // The keys of #test_hijack_value need to match the #name of the control.
         // @see FormsTestCase::testDisabledElements()
-        '#test_hijack_value' => $type == 'select' ? array('' => 'test_1') : array('test_1' => 'test_1'),
+        '#test_hijack_value' => $type == 'select' ? ['' => 'test_1'] : ['test_1' => 'test_1'],
         '#disabled' => TRUE,
-      );
+      ];
     }
 
     // Single values option elements.
-    foreach (array('radios', 'select') as $type) {
-      $form[$type . '_single'] = array(
+    foreach (['radios', 'select'] as $type) {
+      $form[$type . '_single'] = [
         '#type' => $type,
         '#title' => $type . ' (single)',
-        '#options' => array(
+        '#options' => [
           'test_1' => 'Test 1',
           'test_2' => 'Test 2',
-        ),
+        ],
         '#multiple' => FALSE,
         '#default_value' => 'test_2',
         '#test_hijack_value' => 'test_1',
         '#disabled' => TRUE,
-      );
+      ];
     }
 
     // Checkbox and radio.
-    foreach (array('checkbox', 'radio') as $type) {
-      $form[$type . '_unchecked'] = array(
+    foreach (['checkbox', 'radio'] as $type) {
+      $form[$type . '_unchecked'] = [
         '#type' => $type,
         '#title' => $type . ' (unchecked)',
         '#return_value' => 1,
         '#default_value' => 0,
         '#test_hijack_value' => 1,
         '#disabled' => TRUE,
-      );
-      $form[$type . '_checked'] = array(
+      ];
+      $form[$type . '_checked'] = [
         '#type' => $type,
         '#title' => $type . ' (checked)',
         '#return_value' => 1,
         '#default_value' => 1,
         '#test_hijack_value' => NULL,
         '#disabled' => TRUE,
-      );
+      ];
     }
 
     // Weight, number, range.
-    foreach (array('weight', 'number', 'range') as $type) {
-      $form[$type] = array(
+    foreach (['weight', 'number', 'range'] as $type) {
+      $form[$type] = [
         '#type' => $type,
         '#title' => $type,
         '#default_value' => 10,
         '#test_hijack_value' => 5,
         '#disabled' => TRUE,
-      );
+      ];
     }
 
     // Color.
-    $form['color'] = array(
+    $form['color'] = [
       '#type' => 'color',
       '#title' => 'color',
       '#default_value' => '#0000ff',
       '#test_hijack_value' => '#ff0000',
       '#disabled' => TRUE,
-    );
+    ];
 
     // The #disabled state should propagate to children.
-    $form['disabled_container'] = array(
+    $form['disabled_container'] = [
       '#disabled' => TRUE,
-    );
-    foreach (array('textfield', 'textarea', 'hidden', 'tel', 'url') as $type) {
-      $form['disabled_container']['disabled_container_' . $type] = array(
+    ];
+    foreach (['textfield', 'textarea', 'hidden', 'tel', 'url'] as $type) {
+      $form['disabled_container']['disabled_container_' . $type] = [
         '#type' => $type,
         '#title' => $type,
         '#default_value' => $type,
         '#test_hijack_value' => 'HIJACK',
-      );
+      ];
     }
 
     // Date.
@@ -128,103 +128,103 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // versions by encoding and decoding it again instead of hardcoding it.
     // See https://github.com/php/php-src/commit/fdb2709dd27c5987c2d2c8aaf0cdbebf9f17f643
     $expected = json_decode(json_encode($date), TRUE);
-    $form['disabled_container']['disabled_container_datetime'] = array(
+    $form['disabled_container']['disabled_container_datetime'] = [
       '#type' => 'datetime',
       '#title' => 'datetime',
       '#default_value' => $date,
       '#expected_value' => $expected,
       '#test_hijack_value' => new DrupalDateTime('1978-12-02 11:30:00', 'Europe/Berlin'),
       '#date_timezone' => 'Europe/Berlin',
-    );
+    ];
 
-    $form['disabled_container']['disabled_container_date'] = array(
+    $form['disabled_container']['disabled_container_date'] = [
       '#type' => 'date',
       '#title' => 'date',
       '#default_value' => '2001-01-13',
       '#expected_value' => '2001-01-13',
       '#test_hijack_value' => '2013-01-01',
       '#date_timezone' => 'Europe/Berlin',
-    );
+    ];
 
 
     // Try to hijack the email field with a valid email.
-    $form['disabled_container']['disabled_container_email'] = array(
+    $form['disabled_container']['disabled_container_email'] = [
       '#type' => 'email',
       '#title' => 'email',
       '#default_value' => 'foo@example.com',
       '#test_hijack_value' => 'bar@example.com',
-    );
+    ];
 
     // Try to hijack the URL field with a valid URL.
-    $form['disabled_container']['disabled_container_url'] = array(
+    $form['disabled_container']['disabled_container_url'] = [
       '#type' => 'url',
       '#title' => 'url',
       '#default_value' => 'http://example.com',
       '#test_hijack_value' => 'http://example.com/foo',
-    );
+    ];
 
     // Text format.
-    $form['text_format'] = array(
+    $form['text_format'] = [
       '#type' => 'text_format',
       '#title' => 'Text format',
       '#disabled' => TRUE,
       '#default_value' => 'Text value',
       '#format' => 'plain_text',
-      '#expected_value' => array(
+      '#expected_value' => [
         'value' => 'Text value',
         'format' => 'plain_text',
-      ),
-      '#test_hijack_value' => array(
+      ],
+      '#test_hijack_value' => [
         'value' => 'HIJACK',
         'format' => 'filtered_html',
-      ),
-    );
+      ],
+    ];
 
     // Password fields.
-    $form['password'] = array(
+    $form['password'] = [
       '#type' => 'password',
       '#title' => 'Password',
       '#disabled' => TRUE,
-    );
-    $form['password_confirm'] = array(
+    ];
+    $form['password_confirm'] = [
       '#type' => 'password_confirm',
       '#title' => 'Password confirm',
       '#disabled' => TRUE,
-    );
+    ];
 
     // Files.
-    $form['file'] = array(
+    $form['file'] = [
       '#type' => 'file',
       '#title' => 'File',
       '#disabled' => TRUE,
-    );
-    $form['managed_file'] = array(
+    ];
+    $form['managed_file'] = [
       '#type' => 'managed_file',
       '#title' => 'Managed file',
       '#disabled' => TRUE,
-    );
+    ];
 
     // Buttons.
-    $form['image_button'] = array(
+    $form['image_button'] = [
       '#type' => 'image_button',
       '#value' => 'Image button',
       '#disabled' => TRUE,
-    );
-    $form['button'] = array(
+    ];
+    $form['button'] = [
       '#type' => 'button',
       '#value' => 'Button',
       '#disabled' => TRUE,
-    );
-    $form['submit_disabled'] = array(
+    ];
+    $form['submit_disabled'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
       '#disabled' => TRUE,
-    );
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestEmailForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestEmailForm.php
index d669515a5d3618fe88688faefa551301211d7d20..8e82623dbceeaa338ecbad3c2e7afb26ea929db9 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestEmailForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestEmailForm.php
@@ -22,21 +22,21 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['email'] = array(
+    $form['email'] = [
       '#type' => 'email',
       '#title' => 'Email address',
       '#description' => 'An email address.',
-    );
-    $form['email_required'] = array(
+    ];
+    $form['email_required'] = [
       '#type' => 'email',
       '#title' => 'Address',
       '#required' => TRUE,
       '#description' => 'A required email address field.',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestEmptySelectForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestEmptySelectForm.php
index b6f94545905eabca4c76d7623140a8b90a6a82b3..14dcb0c3374a4f85170dbd21ce6db5ea60645c98 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestEmptySelectForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestEmptySelectForm.php
@@ -21,12 +21,12 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['empty_select'] = array(
+    $form['empty_select'] = [
       '#type' => 'select',
       '#title' => t('Empty Select'),
       '#multiple' => FALSE,
       '#options' => NULL,
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestFormStateValuesCleanAdvancedForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestFormStateValuesCleanAdvancedForm.php
index d3cbd5206e3eaeddcc6713c45ea23f26ef3d6e31..f910469bda4b55f23c0bf1ab25db8cd9faad0a67 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestFormStateValuesCleanAdvancedForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestFormStateValuesCleanAdvancedForm.php
@@ -22,16 +22,16 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     // Build an example form containing a managed file and a submit form element.
-    $form['image'] = array(
+    $form['image'] = [
       '#type' => 'managed_file',
       '#title' => t('Image'),
       '#upload_location' => 'public://',
       '#default_value' => 0,
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestFormStateValuesCleanForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestFormStateValuesCleanForm.php
index bef5675243ef5337feb5da820e8150973ee12c16..d5e0fd965872d285f729b7ff9c294402a5109f54 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestFormStateValuesCleanForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestFormStateValuesCleanForm.php
@@ -24,13 +24,13 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     // Build an example form containing multiple submit and button elements; not
     // only on the top-level.
-    $form = array('#tree' => TRUE);
-    $form['foo'] = array('#type' => 'submit', '#value' => t('Submit'));
-    $form['bar'] = array('#type' => 'submit', '#value' => t('Submit'));
-    $form['beer'] = array('#type' => 'value', '#value' => 1000);
-    $form['baz']['foo'] = array('#type' => 'button', '#value' => t('Submit'));
-    $form['baz']['baz'] = array('#type' => 'submit', '#value' => t('Submit'));
-    $form['baz']['beer'] = array('#type' => 'value', '#value' => 2000);
+    $form = ['#tree' => TRUE];
+    $form['foo'] = ['#type' => 'submit', '#value' => t('Submit')];
+    $form['bar'] = ['#type' => 'submit', '#value' => t('Submit')];
+    $form['beer'] = ['#type' => 'value', '#value' => 1000];
+    $form['baz']['foo'] = ['#type' => 'button', '#value' => t('Submit')];
+    $form['baz']['baz'] = ['#type' => 'submit', '#value' => t('Submit')];
+    $form['baz']['beer'] = ['#type' => 'value', '#value' => 2000];
 
     // Add an arbitrary element and manually set it to be cleaned.
     // Using $form_state->addCleanValueKey('wine'); didn't work here.
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupContainerForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupContainerForm.php
index a9298efddea6c6ae78299fdc12e31c4f0122ff10..b141b7cc2799f6f7524c9118a3fad3c0c419652d 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupContainerForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupContainerForm.php
@@ -21,19 +21,19 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['container'] = array(
+    $form['container'] = [
       '#type' => 'container',
-    );
-    $form['meta'] = array(
+    ];
+    $form['meta'] = [
       '#type' => 'details',
       '#title' => 'Group element',
       '#open' => TRUE,
       '#group' => 'container',
-    );
-    $form['meta']['element'] = array(
+    ];
+    $form['meta']['element'] = [
       '#type' => 'textfield',
       '#title' => 'Nest in details element',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupDetailsForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupDetailsForm.php
index faa83cce9cacab4935048c39d4e7d8ef9aec0aac..002b07dd7f7361ea280c21211eb6336bd7f1ebc2 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupDetailsForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupDetailsForm.php
@@ -21,22 +21,22 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state, $required = FALSE) {
-    $form['details'] = array(
+    $form['details'] = [
       '#type' => 'details',
       '#title' => 'Root element',
       '#open' => TRUE,
       '#required' => !empty($required),
-    );
-    $form['meta'] = array(
+    ];
+    $form['meta'] = [
       '#type' => 'details',
       '#title' => 'Group element',
       '#open' => TRUE,
       '#group' => 'details',
-    );
-    $form['meta']['element'] = array(
+    ];
+    $form['meta']['element'] = [
       '#type' => 'textfield',
       '#title' => 'Nest in details element',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupFieldsetForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupFieldsetForm.php
index fd7d83b8c1732858bb806483090ca53a27573149..37ef246ec8f3af9efe61cf2f096e49fe447117af 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupFieldsetForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupFieldsetForm.php
@@ -21,20 +21,20 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state, $required = FALSE) {
-    $form['fieldset'] = array(
+    $form['fieldset'] = [
       '#type' => 'fieldset',
       '#title' => 'Fieldset',
       '#required' => !empty($required),
-    );
-    $form['meta'] = array(
+    ];
+    $form['meta'] = [
       '#type' => 'container',
       '#title' => 'Group element',
       '#group' => 'fieldset',
-    );
-    $form['meta']['element'] = array(
+    ];
+    $form['meta']['element'] = [
       '#type' => 'textfield',
       '#title' => 'Nest in container element',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupVerticalTabsForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupVerticalTabsForm.php
index 842ae9d0c7a4a009d92d0f5d3a05c26f62517f55..2d2f98bdf46db47f65654de8962a3b86cf49f04a 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupVerticalTabsForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestGroupVerticalTabsForm.php
@@ -21,27 +21,27 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['vertical_tabs'] = array(
+    $form['vertical_tabs'] = [
       '#type' => 'vertical_tabs',
-    );
-    $form['meta'] = array(
+    ];
+    $form['meta'] = [
       '#type' => 'details',
       '#title' => 'First group element',
       '#group' => 'vertical_tabs',
-    );
-    $form['meta']['element'] = array(
+    ];
+    $form['meta']['element'] = [
       '#type' => 'textfield',
       '#title' => 'First nested element in details element',
-    );
-    $form['meta_2'] = array(
+    ];
+    $form['meta_2'] = [
       '#type' => 'details',
       '#title' => 'Second group element',
       '#group' => 'vertical_tabs',
-    );
-    $form['meta_2']['element_2'] = array(
+    ];
+    $form['meta_2']['element_2'] = [
       '#type' => 'textfield',
       '#title' => 'Second nested element in details element',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestInputForgeryForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestInputForgeryForm.php
index 2eeaf7f414dc831229d9c476cead8244a7193fcd..c8a82c88b4836b889ea75b16dd209fbe782f5afe 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestInputForgeryForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestInputForgeryForm.php
@@ -21,18 +21,18 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     // For testing that a user can't submit a value not matching one of the
     // allowed options.
-    $form['checkboxes'] = array(
+    $form['checkboxes'] = [
       '#title' => t('Checkboxes'),
       '#type' => 'checkboxes',
-      '#options' => array(
+      '#options' => [
         'one' => 'One',
         'two' => 'Two',
-      ),
-    );
-    $form['submit'] = array(
+      ],
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestLabelForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestLabelForm.php
index 1adaa18c1fe70b1d1563e6e31c0fd0700db6bead..74c92ab611189480759c6f7bc214cb874a5c0a52 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestLabelForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestLabelForm.php
@@ -21,108 +21,108 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['form_checkboxes_test'] = array(
+    $form['form_checkboxes_test'] = [
       '#type' => 'checkboxes',
       '#title' => t('Checkboxes test'),
-      '#options' => array(
+      '#options' => [
         'first-checkbox' => t('First checkbox'),
         'second-checkbox' => t('Second checkbox'),
         'third-checkbox' => t('Third checkbox'),
         '0' => t('0'),
-      ),
-    );
-    $form['form_radios_test'] = array(
+      ],
+    ];
+    $form['form_radios_test'] = [
       '#type' => 'radios',
       '#title' => t('Radios test'),
-      '#options' => array(
+      '#options' => [
         'first-radio' => t('First radio'),
         'second-radio' => t('Second radio'),
         'third-radio' => t('Third radio'),
         '0' => t('0'),
-      ),
+      ],
       // Test #field_prefix and #field_suffix placement.
       '#field_prefix' => '<span id="form-test-radios-field-prefix">' . t('Radios #field_prefix element') . '</span>',
       '#field_suffix' => '<span id="form-test-radios-field-suffix">' . t('Radios #field_suffix element') . '</span>',
-    );
-    $form['form_checkbox_test'] = array(
+    ];
+    $form['form_checkbox_test'] = [
       '#type' => 'checkbox',
       '#title' => t('Checkbox test'),
-    );
-    $form['form_textfield_test_title_and_required'] = array(
+    ];
+    $form['form_textfield_test_title_and_required'] = [
       '#type' => 'textfield',
       '#title' => t('Textfield test for required with title'),
       '#required' => TRUE,
-    );
-    $form['form_textfield_test_no_title_required'] = array(
+    ];
+    $form['form_textfield_test_no_title_required'] = [
       '#type' => 'textfield',
       // We use an empty title, since not setting #title suppresses the label
       // and required marker.
       '#title' => '',
       '#required' => TRUE,
-    );
-    $form['form_textfield_test_title'] = array(
+    ];
+    $form['form_textfield_test_title'] = [
       '#type' => 'textfield',
       '#title' => t('Textfield test for title only'),
       // Not required.
       // Test #prefix and #suffix placement.
       '#prefix' => '<div id="form-test-textfield-title-prefix">' . t('Textfield #prefix element') . '</div>',
       '#suffix' => '<div id="form-test-textfield-title-suffix">' . t('Textfield #suffix element') . '</div>',
-    );
-    $form['form_textfield_test_title_after'] = array(
+    ];
+    $form['form_textfield_test_title_after'] = [
       '#type' => 'textfield',
       '#title' => t('Textfield test for title after element'),
       '#title_display' => 'after',
-    );
-    $form['form_textfield_test_title_invisible'] = array(
+    ];
+    $form['form_textfield_test_title_invisible'] = [
       '#type' => 'textfield',
       '#title' => t('Textfield test for invisible title'),
       '#title_display' => 'invisible',
-    );
+    ];
     // Textfield test for title set not to display.
-    $form['form_textfield_test_title_no_show'] = array(
+    $form['form_textfield_test_title_no_show'] = [
       '#type' => 'textfield',
-    );
+    ];
     // Checkboxes & radios with title as attribute.
-    $form['form_checkboxes_title_attribute'] = array(
+    $form['form_checkboxes_title_attribute'] = [
       '#type' => 'checkboxes',
       '#title' => 'Checkboxes test',
       '#title_display' => 'attribute',
-      '#options' => array(
+      '#options' => [
         'first-checkbox' => 'First checkbox',
         'second-checkbox' => 'Second checkbox',
-      ),
+      ],
       '#required' => TRUE,
-    );
-    $form['form_radios_title_attribute'] = array(
+    ];
+    $form['form_radios_title_attribute'] = [
       '#type' => 'radios',
       '#title' => 'Radios test',
       '#title_display' => 'attribute',
-      '#options' => array(
+      '#options' => [
         'first-radio' => 'First radio',
         'second-radio' => 'Second radio',
-      ),
+      ],
       '#required' => TRUE,
-    );
-    $form['form_checkboxes_title_invisible'] = array(
+    ];
+    $form['form_checkboxes_title_invisible'] = [
       '#type' => 'checkboxes',
       '#title' => 'Checkboxes test invisible',
       '#title_display' => 'invisible',
-      '#options' => array(
+      '#options' => [
         'first-checkbox' => 'First checkbox',
         'second-checkbox' => 'Second checkbox',
-      ),
+      ],
       '#required' => TRUE,
-    );
-    $form['form_radios_title_invisible'] = array(
+    ];
+    $form['form_radios_title_invisible'] = [
       '#type' => 'radios',
       '#title' => 'Radios test invisible',
       '#title_display' => 'invisible',
-      '#options' => array(
+      '#options' => [
         'first-radio' => 'First radio',
         'second-radio' => 'Second radio',
-      ),
+      ],
       '#required' => TRUE,
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestLanguageSelectForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestLanguageSelectForm.php
index 0479450413471762e86c4589843f88501977a8ae..ba41e19fef8b6f7e5ca3ce523ab0e14d5bbf6073 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestLanguageSelectForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestLanguageSelectForm.php
@@ -23,38 +23,38 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['languages_all'] = array(
+    $form['languages_all'] = [
       '#title' => t('Languages: All'),
       '#type' => 'language_select',
       '#languages' => LanguageInterface::STATE_ALL,
       '#default_value' => 'xx',
-    );
-    $form['languages_configurable'] = array(
+    ];
+    $form['languages_configurable'] = [
       '#title' => t('Languages: Configurable'),
       '#type' => 'language_select',
       '#languages' => LanguageInterface::STATE_CONFIGURABLE,
       '#default_value' => 'en',
-    );
-    $form['languages_locked'] = array(
+    ];
+    $form['languages_locked'] = [
       '#title' => t('Languages: Locked'),
       '#type' => 'language_select',
       '#languages' => LanguageInterface::STATE_LOCKED,
-    );
-    $form['languages_config_and_locked'] = array(
+    ];
+    $form['languages_config_and_locked'] = [
       '#title' => t('Languages: Configurable and locked'),
       '#type' => 'language_select',
       '#languages' => LanguageInterface::STATE_CONFIGURABLE | LanguageInterface::STATE_LOCKED,
       '#default_value' => 'dummy_value',
-    );
-    $form['language_custom_options'] = array(
+    ];
+    $form['language_custom_options'] = [
       '#title' => t('Languages: Custom'),
       '#type' => 'language_select',
       '#languages' => LanguageInterface::STATE_CONFIGURABLE | LanguageInterface::STATE_LOCKED,
-      '#options' => array('opt1' => 'First option', 'opt2' => 'Second option', 'opt3' => 'Third option'),
+      '#options' => ['opt1' => 'First option', 'opt2' => 'Second option', 'opt3' => 'Third option'],
       '#default_value' => 'opt2',
-    );
+    ];
 
-    $form['submit'] = array('#type' => 'submit', '#value' => 'Submit');
+    $form['submit'] = ['#type' => 'submit', '#value' => 'Submit'];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestLimitValidationErrorsForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestLimitValidationErrorsForm.php
index 2cb22936abab710753b9548366ad600928779d52..deff0b49d4733724bac6fab2683d378618d23d4a 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestLimitValidationErrorsForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestLimitValidationErrorsForm.php
@@ -21,62 +21,62 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['title'] = array(
+    $form['title'] = [
       '#type' => 'textfield',
       '#title' => 'Title',
       '#required' => TRUE,
-    );
+    ];
 
-    $form['test'] = array(
+    $form['test'] = [
       '#title' => 'Test',
       '#type' => 'textfield',
-      '#element_validate' => array('::elementValidateLimitValidationErrors'),
-    );
-    $form['test_numeric_index'] = array(
+      '#element_validate' => ['::elementValidateLimitValidationErrors'],
+    ];
+    $form['test_numeric_index'] = [
       '#tree' => TRUE,
-    );
-    $form['test_numeric_index'][0] = array(
+    ];
+    $form['test_numeric_index'][0] = [
       '#title' => 'Test (numeric index)',
       '#type' => 'textfield',
-      '#element_validate' => array('::elementValidateLimitValidationErrors'),
-    );
+      '#element_validate' => ['::elementValidateLimitValidationErrors'],
+    ];
 
-    $form['test_substring'] = array(
+    $form['test_substring'] = [
       '#tree' => TRUE,
-    );
-    $form['test_substring']['foo'] = array(
+    ];
+    $form['test_substring']['foo'] = [
       '#title' => 'Test (substring) foo',
       '#type' => 'textfield',
-      '#element_validate' => array('::elementValidateLimitValidationErrors'),
-    );
-    $form['test_substring']['foobar'] = array(
+      '#element_validate' => ['::elementValidateLimitValidationErrors'],
+    ];
+    $form['test_substring']['foobar'] = [
       '#title' => 'Test (substring) foobar',
       '#type' => 'textfield',
-      '#element_validate' => array('::elementValidateLimitValidationErrors'),
-    );
+      '#element_validate' => ['::elementValidateLimitValidationErrors'],
+    ];
 
-    $form['actions']['partial'] = array(
+    $form['actions']['partial'] = [
       '#type' => 'submit',
-      '#limit_validation_errors' => array(array('test')),
-      '#submit' => array('::partialSubmitForm'),
+      '#limit_validation_errors' => [['test']],
+      '#submit' => ['::partialSubmitForm'],
       '#value' => t('Partial validate'),
-    );
-    $form['actions']['partial_numeric_index'] = array(
+    ];
+    $form['actions']['partial_numeric_index'] = [
       '#type' => 'submit',
-      '#limit_validation_errors' => array(array('test_numeric_index', 0)),
-      '#submit' => array('::partialSubmitForm'),
+      '#limit_validation_errors' => [['test_numeric_index', 0]],
+      '#submit' => ['::partialSubmitForm'],
       '#value' => t('Partial validate (numeric index)'),
-    );
-    $form['actions']['substring'] = array(
+    ];
+    $form['actions']['substring'] = [
       '#type' => 'submit',
-      '#limit_validation_errors' => array(array('test_substring', 'foo')),
-      '#submit' => array('::partialSubmitForm'),
+      '#limit_validation_errors' => [['test_substring', 'foo']],
+      '#submit' => ['::partialSubmitForm'],
       '#value' => t('Partial validate (substring)'),
-    );
-    $form['actions']['full'] = array(
+    ];
+    $form['actions']['full'] = [
       '#type' => 'submit',
       '#value' => t('Full validate'),
-    );
+    ];
     return $form;
   }
 
@@ -85,7 +85,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    */
   public function elementValidateLimitValidationErrors($element, FormStateInterface $form_state) {
     if ($element['#value'] == 'invalid') {
-      $form_state->setError($element, t('@label element is invalid', array('@label' => $element['#title'])));
+      $form_state->setError($element, t('@label element is invalid', ['@label' => $element['#title']]));
     }
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestNumberForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestNumberForm.php
index 6b9520bff0a2593278ac0d34f2960f350204f135..ab281462eb679540e49355ea4c1d03fe32f731ef 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestNumberForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestNumberForm.php
@@ -21,114 +21,114 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state, $element = 'number') {
-    $base = array(
+    $base = [
       '#type' => $element,
-    );
+    ];
 
-    $form['integer_no_number'] = $base + array(
+    $form['integer_no_number'] = $base + [
       '#title' => 'Integer test, #no_error',
       '#default_value' => '#no_number',
-    );
-    $form['integer_no_step'] = $base + array(
+    ];
+    $form['integer_no_step'] = $base + [
       '#title' => 'Integer test without step',
       '#default_value' => 5,
-    );
-    $form['integer_no_step_step_error'] = $base + array(
+    ];
+    $form['integer_no_step_step_error'] = $base + [
       '#title' => 'Integer test without step, #step_error',
       '#default_value' => 4.5,
-    );
-    $form['integer_step'] = $base + array(
+    ];
+    $form['integer_step'] = $base + [
       '#title' => 'Integer test with step',
       '#default_value' => 5,
       '#step' => 1,
-    );
-    $form['integer_step_error'] = $base + array(
+    ];
+    $form['integer_step_error'] = $base + [
       '#title' => 'Integer test, with step, #step_error',
       '#default_value' => 5,
       '#step' => 2,
-    );
-    $form['integer_step_min'] = $base + array(
+    ];
+    $form['integer_step_min'] = $base + [
       '#title' => 'Integer test with min value',
       '#default_value' => 5,
       '#min' => 0,
       '#step' => 1,
-    );
-    $form['integer_step_min_error'] = $base + array(
+    ];
+    $form['integer_step_min_error'] = $base + [
       '#title' => 'Integer test with min value, #min_error',
       '#default_value' => 5,
       '#min' => 6,
       '#step' => 1,
-    );
-    $form['integer_step_max'] = $base + array(
+    ];
+    $form['integer_step_max'] = $base + [
       '#title' => 'Integer test with max value',
       '#default_value' => 5,
       '#max' => 6,
       '#step' => 1,
-    );
-    $form['integer_step_max_error'] = $base + array(
+    ];
+    $form['integer_step_max_error'] = $base + [
       '#title' => 'Integer test with max value, #max_error',
       '#default_value' => 5,
       '#max' => 4,
       '#step' => 1,
-    );
-    $form['integer_step_min_border'] = $base + array(
+    ];
+    $form['integer_step_min_border'] = $base + [
       '#title' => 'Integer test with min border check',
       '#default_value' => -1,
       '#min' => -1,
       '#step' => 1,
-    );
-    $form['integer_step_max_border'] = $base + array(
+    ];
+    $form['integer_step_max_border'] = $base + [
       '#title' => 'Integer test with max border check',
       '#default_value' => 5,
       '#max' => 5,
       '#step' => 1,
-    );
-    $form['integer_step_based_on_min'] = $base + array(
+    ];
+    $form['integer_step_based_on_min'] = $base + [
       '#title' => 'Integer test with step based on min check',
       '#default_value' => 3,
       '#min' => -1,
       '#step' => 2,
-    );
-    $form['integer_step_based_on_min_error'] = $base + array(
+    ];
+    $form['integer_step_based_on_min_error'] = $base + [
       '#title' => 'Integer test with step based on min check, #step_error',
       '#default_value' => 4,
       '#min' => -1,
       '#step' => 2,
-    );
-    $form['float_small_step'] = $base + array(
+    ];
+    $form['float_small_step'] = $base + [
       '#title' => 'Float test with a small step',
       '#default_value' => 4,
       '#step' => 0.0000000000001,
-    );
-    $form['float_step_no_error'] = $base + array(
+    ];
+    $form['float_step_no_error'] = $base + [
       '#title' => 'Float test',
       '#default_value' => 1.2,
       '#step' => 0.3,
-    );
-    $form['float_step_error'] = $base + array(
+    ];
+    $form['float_step_error'] = $base + [
       '#title' => 'Float test, #step_error',
       '#default_value' => 1.3,
       '#step' => 0.3,
-    );
-    $form['float_step_hard_no_error'] = $base + array(
+    ];
+    $form['float_step_hard_no_error'] = $base + [
       '#title' => 'Float test hard',
       '#default_value' => 0.9411764729088,
       '#step' => 0.00392156863712,
-    );
-    $form['float_step_hard_error'] = $base + array(
+    ];
+    $form['float_step_hard_error'] = $base + [
       '#title' => 'Float test hard, #step_error',
       '#default_value' => 0.9411764,
       '#step' => 0.00392156863,
-    );
-    $form['float_step_any_no_error'] = $base + array(
+    ];
+    $form['float_step_any_no_error'] = $base + [
       '#title' => 'Arbitrary float',
       '#default_value' => 0.839562930284,
       '#step' => 'aNy',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestPatternForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestPatternForm.php
index 5780172664307404a2ca8a498ab970da4fc098a7..9180628b1395b52ca88ad0b9ddd2f38800ec6240 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestPatternForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestPatternForm.php
@@ -21,34 +21,34 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['textfield'] = array(
+    $form['textfield'] = [
       '#type' => 'textfield',
       '#title' => 'One digit followed by lowercase letters',
       '#pattern' => '[0-9][a-z]+',
-    );
-    $form['tel'] = array(
+    ];
+    $form['tel'] = [
       '#type' => 'tel',
       '#title' => 'Everything except numbers',
       '#pattern' => '[^\d]*',
-    );
-    $form['password'] = array(
+    ];
+    $form['password'] = [
       '#type' => 'password',
       '#title' => 'Password',
       '#pattern' => '[01]+',
-    );
-    $form['url'] = array(
+    ];
+    $form['url'] = [
       '#type' => 'url',
       '#title' => 'Client side validation',
       '#decription' => 'Just client side validation, using the #pattern attribute.',
-      '#attributes' => array(
+      '#attributes' => [
         'pattern' => '.*foo.*',
-      ),
+      ],
       '#pattern' => 'ignored',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestPlaceholderForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestPlaceholderForm.php
index 21a50ff9f5290222e6b1c6dc9b3f08b5d4c33656..9dd53219f13a9f23c610797bb5222c95a457b565 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestPlaceholderForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestPlaceholderForm.php
@@ -21,12 +21,12 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    foreach (array('textfield', 'textarea', 'url', 'password', 'search', 'tel', 'email', 'number') as $type) {
-      $form[$type] = array(
+    foreach (['textfield', 'textarea', 'url', 'password', 'search', 'tel', 'email', 'number'] as $type) {
+      $form[$type] = [
         '#type' => $type,
         '#title' => $type,
         '#placeholder' => 'placeholder-text',
-      );
+      ];
     }
 
     return $form;
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestProgrammaticForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestProgrammaticForm.php
index 1e7a0146c765129d38094abd5f3ca14c8853763f..66928f04f2aba8be6d1bdb3416dc17d99999a248 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestProgrammaticForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestProgrammaticForm.php
@@ -21,61 +21,61 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['textfield'] = array(
+    $form['textfield'] = [
       '#title' => 'Textfield',
       '#type' => 'textfield',
-    );
+    ];
 
-    $form['checkboxes'] = array(
+    $form['checkboxes'] = [
       '#title' => t('Checkboxes'),
       '#type' => 'checkboxes',
-      '#options' => array(
+      '#options' => [
         1 => 'First checkbox',
         2 => 'Second checkbox',
-      ),
+      ],
       // Both checkboxes are selected by default so that we can test the ability
       // of programmatic form submissions to uncheck them.
-      '#default_value' => array(1, 2),
-    );
+      '#default_value' => [1, 2],
+    ];
 
-    $form['field_to_validate'] = array(
+    $form['field_to_validate'] = [
       '#type' => 'radios',
       '#title' => 'Field to validate (in the case of limited validation)',
       '#description' => 'If the form is submitted by clicking the "Submit with limited validation" button, then validation can be limited based on the value of this radio button.',
-      '#options' => array(
+      '#options' => [
         'all' => 'Validate all fields',
         'textfield' => 'Validate the "Textfield" field',
         'field_to_validate' => 'Validate the "Field to validate" field',
-      ),
+      ],
       '#default_value' => 'all',
-    );
+    ];
 
-    $form['field_restricted'] = array(
+    $form['field_restricted'] = [
       '#type' => 'textfield',
       '#title' => 'Textfield (no access)',
       '#access' => FALSE,
-    );
+    ];
 
     // The main submit button for the form.
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     // A secondary submit button that allows validation to be limited based on
     // the value of the above radio selector.
-    $form['submit_limit_validation'] = array(
+    $form['submit_limit_validation'] = [
       '#type' => 'submit',
       '#value' => 'Submit with limited validation',
       // Use the same submit handler for this button as for the form itself.
       // (This must be set explicitly or otherwise the form API will ignore the
       // #limit_validation_errors property.)
-      '#submit' => array('::submitForm'),
-    );
+      '#submit' => ['::submitForm'],
+    ];
     $user_input = $form_state->getUserInput();
     if (!empty($user_input['field_to_validate']) && $user_input['field_to_validate'] != 'all') {
-      $form['submit_limit_validation']['#limit_validation_errors'] = array(
-        array($user_input['field_to_validate']),
-      );
+      $form['submit_limit_validation']['#limit_validation_errors'] = [
+        [$user_input['field_to_validate']],
+      ];
     }
 
     return $form;
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestRangeForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestRangeForm.php
index 25cdc3e46e1bd2eae79ef578e55c094ede2aaf6c..94240e5e9a9c21174a42da2489ba07117638ce7b 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestRangeForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestRangeForm.php
@@ -22,7 +22,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['with_default_value'] = array(
+    $form['with_default_value'] = [
       '#type' => 'range',
       '#title' => 'Range with default value',
       '#min' => 10,
@@ -30,34 +30,34 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#step' => 2,
       '#default_value' => 18,
       '#description' => 'The default value is 18.',
-    );
-    $form['float'] = array(
+    ];
+    $form['float'] = [
       '#type' => 'range',
       '#title' => 'Float',
       '#min' => 10,
       '#max' => 11,
       '#step' => 'any',
       '#description' => 'Floating point number between 10 and 11.',
-    );
-    $form['integer'] = array(
+    ];
+    $form['integer'] = [
       '#type' => 'range',
       '#title' => 'Integer',
       '#min' => 2,
       '#max' => 8,
       '#step' => 2,
       '#description' => 'Even integer between 2 and 8.',
-    );
-    $form['offset'] = array(
+    ];
+    $form['offset'] = [
       '#type' => 'range',
       '#title' => 'Offset',
       '#min' => 2.9,
       '#max' => 10.9,
       '#description' => 'Value between 2.9 and 10.9.',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestRangeInvalidForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestRangeInvalidForm.php
index 49bb0b9bbec318aa83c20690a750f361c818d8fb..541520585d67544bf027fc70b96a7b65b176edf3 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestRangeInvalidForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestRangeInvalidForm.php
@@ -21,17 +21,17 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['minmax'] = array(
+    $form['minmax'] = [
       '#type' => 'range',
       '#min' => 10,
       '#max' => 5,
       '#title' => 'Invalid range',
       '#description' => 'Minimum greater than maximum.',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestRebuildPreserveValuesForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestRebuildPreserveValuesForm.php
index d0d520ec9786d07dab7ec70d65c9f5431f8ce56c..58934a7819995f9f54e73d964420ba672bb3f0ca 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestRebuildPreserveValuesForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestRebuildPreserveValuesForm.php
@@ -23,58 +23,58 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     // Start the form with two checkboxes, to test different defaults, and a
     // textfield, to test more than one element type.
-    $form = array(
-      'checkbox_1_default_off' => array(
+    $form = [
+      'checkbox_1_default_off' => [
         '#type' => 'checkbox',
         '#title' => t('This checkbox defaults to unchecked'),
         '#default_value' => FALSE,
-      ),
-      'checkbox_1_default_on' => array(
+      ],
+      'checkbox_1_default_on' => [
         '#type' => 'checkbox',
         '#title' => t('This checkbox defaults to checked'),
         '#default_value' => TRUE,
-      ),
-      'text_1' => array(
+      ],
+      'text_1' => [
         '#type' => 'textfield',
         '#title' => t('This textfield has a non-empty default value.'),
         '#default_value' => 'DEFAULT 1',
-      ),
-    );
+      ],
+    ];
     // Provide an 'add more' button that rebuilds the form with an additional two
     // checkboxes and a textfield. The test is to make sure that the rebuild
     // triggered by this button preserves the user input values for the initial
     // elements and initializes the new elements with the correct default values.
     if (!$form_state->has('add_more')) {
-      $form['add_more'] = array(
+      $form['add_more'] = [
         '#type' => 'submit',
         '#value' => 'Add more',
-        '#submit' => array('::addMoreSubmitForm'),
-      );
+        '#submit' => ['::addMoreSubmitForm'],
+      ];
     }
     else {
-      $form += array(
-        'checkbox_2_default_off' => array(
+      $form += [
+        'checkbox_2_default_off' => [
           '#type' => 'checkbox',
           '#title' => t('This checkbox defaults to unchecked'),
           '#default_value' => FALSE,
-        ),
-        'checkbox_2_default_on' => array(
+        ],
+        'checkbox_2_default_on' => [
           '#type' => 'checkbox',
           '#title' => t('This checkbox defaults to checked'),
           '#default_value' => TRUE,
-        ),
-        'text_2' => array(
+        ],
+        'text_2' => [
           '#type' => 'textfield',
           '#title' => t('This textfield has a non-empty default value.'),
           '#default_value' => 'DEFAULT 2',
-        ),
-      );
+        ],
+      ];
     }
     // A submit button that finishes the form workflow (does not rebuild).
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
@@ -92,7 +92,7 @@ public function addMoreSubmitForm(array &$form, FormStateInterface $form_state)
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     // Finish the workflow. Do not rebuild.
-    drupal_set_message(t('Form values: %values', array('%values' => var_export($form_state->getValues(), TRUE))));
+    drupal_set_message(t('Form values: %values', ['%values' => var_export($form_state->getValues(), TRUE)]));
   }
 
 }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestRedirectForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestRedirectForm.php
index c540fb75536474a79e3d2d0b267c7b9adbe8de6c..4768acf901f5f549afddff75425ce779056a8438 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestRedirectForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestRedirectForm.php
@@ -22,23 +22,23 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['redirection'] = array(
+    $form['redirection'] = [
       '#type' => 'checkbox',
       '#title' => t('Use redirection'),
-    );
-    $form['destination'] = array(
+    ];
+    $form['destination'] = [
       '#type' => 'textfield',
       '#title' => t('Redirect destination'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="redirection"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-    $form['submit'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="redirection"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestRequiredAttributeForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestRequiredAttributeForm.php
index f11c3caf20ad0782d73a5591b24d7bcea1a34d36..b0aa1b00b7e6a2d707a64bf3659d6c2bb3cff4d5 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestRequiredAttributeForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestRequiredAttributeForm.php
@@ -21,17 +21,17 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    foreach (array('textfield', 'textarea', 'password') as $type) {
-      $form[$type] = array(
+    foreach (['textfield', 'textarea', 'password'] as $type) {
+      $form[$type] = [
         '#type' => $type,
         '#required' => TRUE,
         '#title' => $type,
-      );
+      ];
     }
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestResponseForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestResponseForm.php
index 47bc1b9981df3e31a978f041fcdb50939feb5f73..0ab3a0d211bc9aca3d4fbdc161d0062bde0c19a1 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestResponseForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestResponseForm.php
@@ -22,19 +22,19 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['content'] = array(
+    $form['content'] = [
       '#type' => 'textfield',
       '#title' => 'Content',
-    );
-    $form['status'] = array(
+    ];
+    $form['status'] = [
       '#type' => 'textfield',
       '#title' => 'Status',
       '#default_value' => 200,
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestSelectForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestSelectForm.php
index 76cdc1acbea2ebe07f36345b99addd0a4fe12144..20242ec2ebd9716b00abbe0062147bab41278cef 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestSelectForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestSelectForm.php
@@ -22,100 +22,100 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $base = array(
+    $base = [
       '#type' => 'select',
-      '#options' => array('one' => 'one', 'two' => 'two', 'three' => 'three', 'four' => '<strong>four</strong>'),
-    );
+      '#options' => ['one' => 'one', 'two' => 'two', 'three' => 'three', 'four' => '<strong>four</strong>'],
+    ];
 
-    $form['select'] = $base + array(
+    $form['select'] = $base + [
       '#title' => '#default_value one',
       '#default_value' => 'one',
-    );
-    $form['select_required'] = $base + array(
+    ];
+    $form['select_required'] = $base + [
       '#title' => '#default_value one, #required',
       '#required' => TRUE,
       '#default_value' => 'one',
-    );
-    $form['select_optional'] = $base + array(
+    ];
+    $form['select_optional'] = $base + [
       '#title' => '#default_value one, not #required',
       '#required' => FALSE,
       '#default_value' => 'one',
-    );
-    $form['empty_value'] = $base + array(
+    ];
+    $form['empty_value'] = $base + [
       '#title' => '#default_value one, #required, #empty_value 0',
       '#required' => TRUE,
       '#default_value' => 'one',
       '#empty_value' => 0,
-    );
-    $form['empty_value_one'] = $base + array(
+    ];
+    $form['empty_value_one'] = $base + [
       '#title' => '#default_value = #empty_value, #required',
       '#required' => TRUE,
       '#default_value' => 'one',
       '#empty_value' => 'one',
-    );
+    ];
 
-    $form['no_default'] = $base + array(
+    $form['no_default'] = $base + [
       '#title' => 'No #default_value, #required',
       '#required' => TRUE,
-    );
-    $form['no_default_optional'] = $base + array(
+    ];
+    $form['no_default_optional'] = $base + [
       '#title' => 'No #default_value, not #required',
       '#required' => FALSE,
       '#description' => 'Should result in "one" because it is not required and there is no #empty_value requested, so default browser behavior of preselecting first option is in effect.',
-    );
-    $form['no_default_optional_empty_value'] = $base + array(
+    ];
+    $form['no_default_optional_empty_value'] = $base + [
       '#title' => 'No #default_value, not #required, #empty_value empty string',
       '#empty_value' => '',
       '#required' => FALSE,
       '#description' => 'Should result in an empty string (due to #empty_value) because it is optional.',
-    );
+    ];
 
-    $form['no_default_empty_option'] = $base + array(
+    $form['no_default_empty_option'] = $base + [
       '#title' => 'No #default_value, #required, #empty_option',
       '#required' => TRUE,
       '#empty_option' => '- Choose -',
-    );
-    $form['no_default_empty_option_optional'] = $base + array(
+    ];
+    $form['no_default_empty_option_optional'] = $base + [
       '#title' => 'No #default_value, not #required, #empty_option',
       '#empty_option' => '- Dismiss -',
       '#description' => 'Should result in an empty string (default of #empty_value) because it is optional.',
-    );
+    ];
 
-    $form['no_default_empty_value'] = $base + array(
+    $form['no_default_empty_value'] = $base + [
       '#title' => 'No #default_value, #required, #empty_value 0',
       '#required' => TRUE,
       '#empty_value' => 0,
       '#description' => 'Should never result in 0.',
-    );
-    $form['no_default_empty_value_one'] = $base + array(
+    ];
+    $form['no_default_empty_value_one'] = $base + [
       '#title' => 'No #default_value, #required, #empty_value one',
       '#required' => TRUE,
       '#empty_value' => 'one',
       '#description' => 'A mistakenly assigned #empty_value contained in #options should not be valid.',
-    );
-    $form['no_default_empty_value_optional'] = $base + array(
+    ];
+    $form['no_default_empty_value_optional'] = $base + [
       '#title' => 'No #default_value, not #required, #empty_value 0',
       '#required' => FALSE,
       '#empty_value' => 0,
       '#description' => 'Should result in 0 because it is optional.',
-    );
+    ];
 
-    $form['multiple'] = $base + array(
+    $form['multiple'] = $base + [
       '#title' => '#multiple, #default_value two',
-      '#default_value' => array('two'),
+      '#default_value' => ['two'],
       '#multiple' => TRUE,
-    );
-    $form['multiple_no_default'] = $base + array(
+    ];
+    $form['multiple_no_default'] = $base + [
       '#title' => '#multiple, no #default_value',
       '#multiple' => TRUE,
-    );
-    $form['multiple_no_default_required'] = $base + array(
+    ];
+    $form['multiple_no_default_required'] = $base + [
       '#title' => '#multiple, #required, no #default_value',
       '#required' => TRUE,
       '#multiple' => TRUE,
-    );
+    ];
 
-    $form['submit'] = array('#type' => 'submit', '#value' => 'Submit');
+    $form['submit'] = ['#type' => 'submit', '#value' => 'Submit'];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestStatePersistForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestStatePersistForm.php
index 2640805cf20f232e86387df3e5d2b96dc5530c26..e34af83b1692de9f65b04cb14e11f3b3c43146fc 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestStatePersistForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestStatePersistForm.php
@@ -21,18 +21,18 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['title'] = array(
+    $form['title'] = [
       '#type' => 'textfield',
       '#title' => 'title',
       '#default_value' => 'DEFAULT',
       '#required' => TRUE,
-    );
+    ];
     $form_state->set('value', 'State persisted.');
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestStorageForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestStorageForm.php
index 948c592ceee3bd72622ac94924e5f862765207b2..f9ae07342274e797938e584510c1b857c39cabf4 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestStorageForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestStorageForm.php
@@ -28,7 +28,7 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     if ($form_state->isRebuilding()) {
-      $form_state->setUserInput(array());
+      $form_state->setUserInput([]);
     }
     // Initialize
     $storage = $form_state->getStorage();
@@ -50,32 +50,32 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $_SESSION['constructions']++;
     drupal_set_message("Form constructions: " . $_SESSION['constructions']);
 
-    $form['title'] = array(
+    $form['title'] = [
       '#type' => 'textfield',
       '#title' => 'Title',
       '#default_value' => $storage['thing']['title'],
       '#required' => TRUE,
-    );
-    $form['value'] = array(
+    ];
+    $form['value'] = [
       '#type' => 'textfield',
       '#title' => 'Value',
       '#default_value' => $storage['thing']['value'],
-      '#element_validate' => array('::elementValidateValueCached'),
-    );
-    $form['continue_button'] = array(
+      '#element_validate' => ['::elementValidateValueCached'],
+    ];
+    $form['continue_button'] = [
       '#type' => 'button',
       '#value' => 'Reset',
       // Rebuilds the form without keeping the values.
-    );
-    $form['continue_submit'] = array(
+    ];
+    $form['continue_submit'] = [
       '#type' => 'submit',
       '#value' => 'Continue submit',
-      '#submit' => array('::continueSubmitForm'),
-    );
-    $form['submit'] = array(
+      '#submit' => ['::continueSubmitForm'],
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save',
-    );
+    ];
 
     // @todo Remove this in https://www.drupal.org/node/2524408, because form
     //   cache immutability is no longer necessary, because we no longer cache
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestStoragePageCacheForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestStoragePageCacheForm.php
index e7abbfddca7881a6e70424696332032c6c55c03c..adca384af8ec33e5c5356a821c5cdfd3991a2225 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestStoragePageCacheForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestStoragePageCacheForm.php
@@ -18,30 +18,30 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['title'] = array(
+    $form['title'] = [
       '#type' => 'textfield',
       '#title' => 'Title',
       '#required' => TRUE,
-    );
+    ];
 
-    $form['test_build_id_old'] = array(
+    $form['test_build_id_old'] = [
       '#type' => 'item',
       '#title' => 'Old build id',
       '#markup' => 'No old build id',
-    );
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save',
-    );
+    ];
 
-    $form['rebuild'] = array(
+    $form['rebuild'] = [
       '#type' => 'submit',
       '#value' => 'Rebuild',
-      '#submit' => array(array($this, 'form_test_storage_page_cache_rebuild')),
-    );
+      '#submit' => [[$this, 'form_test_storage_page_cache_rebuild']],
+    ];
 
-    $form['#after_build'] = array(array($this, 'form_test_storage_page_cache_old_build_id'));
+    $form['#after_build'] = [[$this, 'form_test_storage_page_cache_old_build_id']];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectColspanForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectColspanForm.php
index bae573ec18c28858e09bd9ff255732a2e9c002fc..1c9628bcf30b28e5d99eafe48b7b2a38733053fb 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectColspanForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectColspanForm.php
@@ -20,20 +20,20 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     list($header, $options) = _form_test_tableselect_get_data();
 
     // Change the data so that the third column has colspan=2.
-    $header['three'] = array('data' => 'Three', 'colspan' => 2);
+    $header['three'] = ['data' => 'Three', 'colspan' => 2];
     unset($header['four']);
     // Set the each row so that column 3 is an array.
     foreach ($options as $name => $row) {
-      $options[$name]['three'] = array($row['three'], $row['four']);
+      $options[$name]['three'] = [$row['three'], $row['four']];
       unset($options[$name]['four']);
     }
     // Combine cells in row 3.
-    $options['row3']['one'] = array('data' => $options['row3']['one'], 'colspan' => 2);
+    $options['row3']['one'] = ['data' => $options['row3']['one'], 'colspan' => 2];
     unset($options['row3']['two']);
-    $options['row3']['three'] = array('data' => $options['row3']['three'][0], 'colspan' => 2);
+    $options['row3']['three'] = ['data' => $options['row3']['three'][0], 'colspan' => 2];
     unset($options['row3']['four']);
 
-    return $this->tableselectFormBuilder($form, $form_state, array('#header' => $header, '#options' => $options));
+    return $this->tableselectFormBuilder($form, $form_state, ['#header' => $header, '#options' => $options]);
   }
 
   /**
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectEmptyForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectEmptyForm.php
index d7954f15d7a0d9c89d4a08c3f760db47307f0374..199a7d3e274bd74fe76b9de235c863c2a6afb4d1 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectEmptyForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectEmptyForm.php
@@ -17,7 +17,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    return $this->tableselectFormBuilder($form, $form_state, array('#options' => array()));
+    return $this->tableselectFormBuilder($form, $form_state, ['#options' => []]);
   }
 
   /**
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectFormBase.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectFormBase.php
index 4431460d99008387a7089b342707d832eae7e793..0a5bd62a1c3355b63333388459bbd7967a74495c 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectFormBase.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectFormBase.php
@@ -28,7 +28,7 @@ function tableselectFormBuilder($form, FormStateInterface $form_state, $element_
 
     $form['tableselect'] = $element_properties;
 
-    $form['tableselect'] += array(
+    $form['tableselect'] += [
       '#prefix' => '<div id="tableselect-wrapper">',
       '#suffix' => '</div>',
       '#type' => 'tableselect',
@@ -36,16 +36,16 @@ function tableselectFormBuilder($form, FormStateInterface $form_state, $element_
       '#options' => $options,
       '#multiple' => FALSE,
       '#empty' => t('Empty text.'),
-      '#ajax' => array(
+      '#ajax' => [
         'callback' => 'form_test_tableselect_ajax_callback',
         'wrapper' => 'tableselect-wrapper',
-      ),
-    );
+      ],
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectJsSelectForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectJsSelectForm.php
index e5483437f2244698a1acf37789e7437ca6f84b48..d6d606aea20d06900f8068885d27393303b6dea1 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectJsSelectForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectJsSelectForm.php
@@ -19,19 +19,19 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state, $test_action = NULL) {
     switch ($test_action) {
       case 'multiple-true-default':
-        $options = array('#multiple' => TRUE);
+        $options = ['#multiple' => TRUE];
         break;
 
       case 'multiple-false-default':
-        $options = array('#multiple' => FALSE);
+        $options = ['#multiple' => FALSE];
         break;
 
       case 'multiple-true-no-advanced-select':
-        $options = array('#multiple' => TRUE, '#js_select' => FALSE);
+        $options = ['#multiple' => TRUE, '#js_select' => FALSE];
         break;
 
       case 'multiple-false-advanced-select':
-        $options = array('#multiple' => FALSE, '#js_select' => TRUE);
+        $options = ['#multiple' => FALSE, '#js_select' => TRUE];
         break;
     }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectMultipleFalseForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectMultipleFalseForm.php
index 66fda87b98fda926c93700507a9fc6e77d70e68d..f21ae3c6f47e65301b0c0e5abc1424dcc990b455 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectMultipleFalseForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectMultipleFalseForm.php
@@ -17,14 +17,14 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    return $this->tableselectFormBuilder($form, $form_state, array('#multiple' => FALSE));
+    return $this->tableselectFormBuilder($form, $form_state, ['#multiple' => FALSE]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    drupal_set_message(t('Submitted: @value', array('@value' => $form_state->getValue('tableselect'))));
+    drupal_set_message(t('Submitted: @value', ['@value' => $form_state->getValue('tableselect')]));
   }
 
 }
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectMultipleTrueForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectMultipleTrueForm.php
index 5d54b93dc75cdb4cf2f24132994cdf122eee0e5d..d4a0c1d40792b5fb9aacf38fd21d62f38339d9e1 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectMultipleTrueForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestTableSelectMultipleTrueForm.php
@@ -17,7 +17,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    return $this->tableselectFormBuilder($form, $form_state, array('#multiple' => TRUE));
+    return $this->tableselectFormBuilder($form, $form_state, ['#multiple' => TRUE]);
   }
 
   /**
@@ -26,7 +26,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $selected = $form_state->getValue('tableselect');
     foreach ($selected as $key => $value) {
-      drupal_set_message(t('Submitted: @key = @value', array('@key' => $key, '@value' => $value)));
+      drupal_set_message(t('Submitted: @key = @value', ['@key' => $key, '@value' => $value]));
     }
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestUrlForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestUrlForm.php
index 88a661556db896207a6fcbbf093b8bded1734e1b..fff0e80521b649f916d8f030394b28e16ef00906 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestUrlForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestUrlForm.php
@@ -22,21 +22,21 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['url'] = array(
+    $form['url'] = [
       '#type' => 'url',
       '#title' => 'Optional URL',
       '#description' => 'An optional URL field.',
-    );
-    $form['url_required'] = array(
+    ];
+    $form['url_required'] = [
       '#type' => 'url',
       '#title' => 'Required URL',
       '#description' => 'A required URL field.',
       '#required' => TRUE,
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Submit',
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateForm.php
index d17dca4f82120c83998f414007df5cfd52ebe387..41772da288d241ec860250b0779a57b06e79ce57 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateForm.php
@@ -33,16 +33,16 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $object = new Callbacks();
 
-    $form['name'] = array(
+    $form['name'] = [
       '#type' => 'textfield',
       '#title' => 'Name',
       '#default_value' => '',
-      '#element_validate' => array(array($object, 'validateName')),
-    );
-    $form['submit'] = array(
+      '#element_validate' => [[$object, 'validateName']],
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save',
-    );
+    ];
 
     return $form;
   }
@@ -57,7 +57,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
       // Alter the submitted value in $form_state.
       $form_state->setValueForElement($form['name'], 'value changed by setValueForElement() in #validate');
       // Output the element's value from $form_state.
-      drupal_set_message(t('@label value: @value', array('@label' => $form['name']['#title'], '@value' => $form_state->getValue('name'))));
+      drupal_set_message(t('@label value: @value', ['@label' => $form['name']['#title'], '@value' => $form_state->getValue('name')]));
 
       // Trigger a form validation error to see our changes.
       $form_state->setErrorByName('');
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateRequiredForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateRequiredForm.php
index b5cf6ec8b197358f1c23c5a02bcd7af6197e4418..88e6b3531853f18420d50f9b612706f9a8945d70 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateRequiredForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateRequiredForm.php
@@ -21,50 +21,50 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $options = array('foo' => 'foo', 'bar' => 'bar');
-    $validate = array('::elementValidateRequired');
+    $options = ['foo' => 'foo', 'bar' => 'bar'];
+    $validate = ['::elementValidateRequired'];
 
-    $form['textfield'] = array(
+    $form['textfield'] = [
       '#type' => 'textfield',
       '#title' => 'Name',
       '#required' => TRUE,
       '#required_error' => t('Please enter a name.'),
-    );
-    $form['checkboxes'] = array(
+    ];
+    $form['checkboxes'] = [
       '#type' => 'checkboxes',
       '#title' => 'Checkboxes',
       '#options' => $options,
       '#required' => TRUE,
       '#form_test_required_error' => t('Please choose at least one option.'),
       '#element_validate' => $validate,
-    );
-    $form['select'] = array(
+    ];
+    $form['select'] = [
       '#type' => 'select',
       '#title' => 'Select',
       '#options' => $options,
       '#required' => TRUE,
       '#form_test_required_error' => t('Please select something.'),
       '#element_validate' => $validate,
-    );
-    $form['radios'] = array(
+    ];
+    $form['radios'] = [
       '#type' => 'radios',
       '#title' => 'Radios',
       '#options' => $options,
       '#required' => TRUE,
-    );
-    $form['radios_optional'] = array(
+    ];
+    $form['radios_optional'] = [
       '#type' => 'radios',
       '#title' => 'Radios (optional)',
       '#options' => $options,
-    );
-    $form['radios_optional_default_value_false'] = array(
+    ];
+    $form['radios_optional_default_value_false'] = [
       '#type' => 'radios',
       '#title' => 'Radios (optional, with a default value of FALSE)',
       '#options' => $options,
       '#default_value' => FALSE,
-    );
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array('#type' => 'submit', '#value' => 'Submit');
+    ];
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = ['#type' => 'submit', '#value' => 'Submit'];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateRequiredNoTitleForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateRequiredNoTitleForm.php
index 30bd76aa110b90edfc9201b3e5fed03fefb8eacd..29b3b5f96134e12f10d34f932b604481fcd55a81 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateRequiredNoTitleForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateRequiredNoTitleForm.php
@@ -21,12 +21,12 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['textfield'] = array(
+    $form['textfield'] = [
       '#type' => 'textfield',
       '#required' => TRUE,
-    );
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array('#type' => 'submit', '#value' => 'Submit');
+    ];
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = ['#type' => 'submit', '#value' => 'Submit'];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestVerticalTabsAccessForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestVerticalTabsAccessForm.php
index bab4d192c0ec8aff43de32cd9b9869b23a10f4d0..cb171a66712f02678d591a50ec4ed232bf38c170 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestVerticalTabsAccessForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestVerticalTabsAccessForm.php
@@ -18,81 +18,81 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['vertical_tabs1'] = array(
+    $form['vertical_tabs1'] = [
       '#type' => 'vertical_tabs',
-    );
-    $form['tab1'] = array(
+    ];
+    $form['tab1'] = [
       '#type' => 'fieldset',
       '#title' => t('Tab 1'),
       '#collapsible' => TRUE,
       '#group' => 'vertical_tabs1',
-    );
-    $form['tab1']['field1'] = array(
+    ];
+    $form['tab1']['field1'] = [
       '#title' => t('Field 1'),
       '#type' => 'checkbox',
       '#default_value' => TRUE,
-    );
-    $form['tab2'] = array(
+    ];
+    $form['tab2'] = [
       '#type' => 'fieldset',
       '#title' => t('Tab 2'),
       '#collapsible' => TRUE,
       '#group' => 'vertical_tabs1',
-    );
-    $form['tab2']['field2'] = array(
+    ];
+    $form['tab2']['field2'] = [
       '#title' => t('Field 2'),
       '#type' => 'textfield',
       '#default_value' => 'field2',
-    );
+    ];
 
-    $form['fieldset1'] = array(
+    $form['fieldset1'] = [
       '#type' => 'fieldset',
       '#title' => t('Fieldset'),
-    );
-    $form['fieldset1']['field3'] = array(
+    ];
+    $form['fieldset1']['field3'] = [
       '#type' => 'checkbox',
       '#title' => t('Field 3'),
       '#default_value' => TRUE,
-    );
+    ];
 
-    $form['container'] = array(
+    $form['container'] = [
       '#type' => 'container',
-    );
-    $form['container']['field4'] = array(
+    ];
+    $form['container']['field4'] = [
       '#type' => 'checkbox',
       '#title' => t('Field 4'),
       '#default_value' => TRUE,
-    );
-    $form['container']['subcontainer'] = array(
+    ];
+    $form['container']['subcontainer'] = [
       '#type' => 'container',
-    );
-    $form['container']['subcontainer']['field5'] = array(
+    ];
+    $form['container']['subcontainer']['field5'] = [
       '#type' => 'checkbox',
       '#title' => t('Field 5'),
       '#default_value' => TRUE,
-    );
+    ];
 
-    $form['vertical_tabs2'] = array(
+    $form['vertical_tabs2'] = [
       '#type' => 'vertical_tabs',
-    );
-    $form['tab3'] = array(
+    ];
+    $form['tab3'] = [
       '#type' => 'fieldset',
       '#title' => t('Tab 3'),
       '#collapsible' => TRUE,
       '#group' => 'vertical_tabs2',
-    );
-    $form['tab3']['field6'] = array(
+    ];
+    $form['tab3']['field6'] = [
       '#title' => t('Field 6'),
       '#type' => 'checkbox',
       '#default_value' => TRUE,
-    );
+    ];
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions',
-    );
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestVerticalTabsForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestVerticalTabsForm.php
index 3457db8087404d827a71e59dad839a391976d16c..b89636a433aba796cb7c8ef27a6802f9ab96b96b 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestVerticalTabsForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestVerticalTabsForm.php
@@ -20,23 +20,23 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $tab_count = 3;
 
-    $form['vertical_tabs'] = array(
+    $form['vertical_tabs'] = [
       '#type' => 'vertical_tabs',
       '#default_tab' => 'edit-tab' . $tab_count,
-    );
+    ];
 
     for ($i = 1; $i <= $tab_count; $i++) {
-      $form['tab' . $i] = array(
+      $form['tab' . $i] = [
         '#type' => 'fieldset',
-        '#title' => t('Tab @num', array('@num' => $i)),
+        '#title' => t('Tab @num', ['@num' => $i]),
         '#group' => 'vertical_tabs',
         '#access' => \Drupal::currentUser()->hasPermission('access vertical_tab_test tabs'),
-      );
-      $form['tab' . $i]['field' . $i] = array(
-        '#title' => t('Field @num', array('@num' => $i)),
+      ];
+      $form['tab' . $i]['field' . $i] = [
+        '#title' => t('Field @num', ['@num' => $i]),
         '#type' => 'textfield',
 
-      );
+      ];
     }
 
     return $form;
diff --git a/core/modules/system/tests/modules/form_test/src/Form/RedirectBlockForm.php b/core/modules/system/tests/modules/form_test/src/Form/RedirectBlockForm.php
index 8963462fd2e40bcb47db1388a53a1a19b5fc7af6..163ac22706852e198b2d761974703d5c8b666b08 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/RedirectBlockForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/RedirectBlockForm.php
@@ -23,8 +23,8 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array('#type' => 'submit', '#value' => $this->t('Submit'));
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = ['#type' => 'submit', '#value' => $this->t('Submit')];
 
     return $form;
   }
@@ -33,7 +33,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    $form_state->setRedirect('form_test.route1', array(), array('query' => array('test1' => 'test2')));
+    $form_state->setRedirect('form_test.route1', [], ['query' => ['test1' => 'test2']]);
   }
 
 }
diff --git a/core/modules/system/tests/modules/form_test/src/FormTestArgumentsObject.php b/core/modules/system/tests/modules/form_test/src/FormTestArgumentsObject.php
index 7bba8e0103251d74c924f4650bc66edf29ff591b..7531ca816a519b5cd5c3d19c7c26de56bf63ed21 100644
--- a/core/modules/system/tests/modules/form_test/src/FormTestArgumentsObject.php
+++ b/core/modules/system/tests/modules/form_test/src/FormTestArgumentsObject.php
@@ -28,19 +28,19 @@ protected function getEditableConfigNames() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state, $arg = NULL) {
-    $form['element'] = array('#markup' => 'The FormTestArgumentsObject::buildForm() method was used for this form.');
+    $form['element'] = ['#markup' => 'The FormTestArgumentsObject::buildForm() method was used for this form.'];
 
-    $form['bananas'] = array(
+    $form['bananas'] = [
       '#type' => 'textfield',
       '#default_value' => $arg,
       '#title' => $this->t('Bananas'),
-    );
+    ];
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/FormTestAutocompleteForm.php b/core/modules/system/tests/modules/form_test/src/FormTestAutocompleteForm.php
index 5b2390cac05b55244051cd92633e98b62ee5b483..019513d082fb2bf52c4a4d5e0dd29d910e3530b7 100644
--- a/core/modules/system/tests/modules/form_test/src/FormTestAutocompleteForm.php
+++ b/core/modules/system/tests/modules/form_test/src/FormTestAutocompleteForm.php
@@ -21,17 +21,17 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['autocomplete_1'] = array(
+    $form['autocomplete_1'] = [
       '#type' => 'textfield',
       '#title' => 'Autocomplete 1',
       '#autocomplete_route_name' => 'form_test.autocomplete_1',
-    );
-    $form['autocomplete_2'] = array(
+    ];
+    $form['autocomplete_2'] = [
       '#type' => 'textfield',
       '#title' => 'Autocomplete 2',
       '#autocomplete_route_name' => 'form_test.autocomplete_2',
-      '#autocomplete_route_parameters' => array('param' => 'value'),
-    );
+      '#autocomplete_route_parameters' => ['param' => 'value'],
+    ];
 
     return $form;
   }
diff --git a/core/modules/system/tests/modules/form_test/src/FormTestControllerObject.php b/core/modules/system/tests/modules/form_test/src/FormTestControllerObject.php
index 826bf2c2f0aea8a4b1c41fa4787a7f375764fd82..7573253481e3aabd3a517a11d16680cdd83ab560 100644
--- a/core/modules/system/tests/modules/form_test/src/FormTestControllerObject.php
+++ b/core/modules/system/tests/modules/form_test/src/FormTestControllerObject.php
@@ -40,21 +40,21 @@ public static function create(ContainerInterface $container) {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state, Request $request = NULL, $custom_attributes = NULL) {
-    $form['element'] = array('#markup' => 'The FormTestControllerObject::buildForm() method was used for this form.');
+    $form['element'] = ['#markup' => 'The FormTestControllerObject::buildForm() method was used for this form.'];
 
     $form['custom_attribute']['#markup'] = $custom_attributes;
     $form['request_attribute']['#markup'] = $request->attributes->get('request_attribute');
 
-    $form['bananas'] = array(
+    $form['bananas'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Bananas'),
-    );
+    ];
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/form_test/src/FormTestObject.php b/core/modules/system/tests/modules/form_test/src/FormTestObject.php
index e64903049e08e8790e968ed7725657a6031235e1..f99fbe73004e68a16d2336d18e5f51a3ecd3d271 100644
--- a/core/modules/system/tests/modules/form_test/src/FormTestObject.php
+++ b/core/modules/system/tests/modules/form_test/src/FormTestObject.php
@@ -28,12 +28,12 @@ protected function getEditableConfigNames() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['element'] = array('#markup' => 'The FormTestObject::buildForm() method was used for this form.');
+    $form['element'] = ['#markup' => 'The FormTestObject::buildForm() method was used for this form.'];
 
-    $form['bananas'] = array(
+    $form['bananas'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Bananas'),
-    );
+    ];
     $form['strawberry'] = [
       '#type' => 'hidden',
       '#value' => 'red',
@@ -41,10 +41,10 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     ];
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
-    );
+    ];
 
     $form['#title'] = 'Test dynamic title';
 
diff --git a/core/modules/system/tests/modules/form_test/src/FormTestServiceObject.php b/core/modules/system/tests/modules/form_test/src/FormTestServiceObject.php
index 10ad61b6199014b568012d435b722ad429cbdd00..effd319bb0c575fee87679bd5b97a9f5262f272a 100644
--- a/core/modules/system/tests/modules/form_test/src/FormTestServiceObject.php
+++ b/core/modules/system/tests/modules/form_test/src/FormTestServiceObject.php
@@ -28,19 +28,19 @@ protected function getEditableConfigNames() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['element'] = array('#markup' => 'The FormTestServiceObject::buildForm() method was used for this form.');
+    $form['element'] = ['#markup' => 'The FormTestServiceObject::buildForm() method was used for this form.'];
 
-    $form['bananas'] = array(
+    $form['bananas'] = [
       '#type' => 'textfield',
       '#default_value' => 'brown',
       '#title' => $this->t('Bananas'),
-    );
+    ];
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/Operation/test/OperationBase.php b/core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/Operation/test/OperationBase.php
index 6ac953240a521538b0568081bd4255ea4f7cbc1f..e978f2a070829ee297086bea323b026fb8da7c04 100644
--- a/core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/Operation/test/OperationBase.php
+++ b/core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/Operation/test/OperationBase.php
@@ -13,7 +13,7 @@ abstract class OperationBase extends ImageToolkitOperationBase {
    * {@inheritdoc}
    */
   public function arguments() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/TestToolkit.php b/core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/TestToolkit.php
index 9766d09906037d26dff941cd23c4d28505f830b8..a28c786904882b26fde5704c56d368baba7b4653 100644
--- a/core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/TestToolkit.php
+++ b/core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/TestToolkit.php
@@ -92,14 +92,14 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     $this->logCall('settings', func_get_args());
-    $form['test_parameter'] = array(
+    $form['test_parameter'] = [
       '#type' => 'number',
       '#title' => $this->t('Test toolkit parameter'),
       '#description' => $this->t('A toolkit parameter for testing purposes.'),
       '#min' => 0,
       '#max' => 100,
       '#default_value' => $this->configFactory->getEditable('system.image.test_toolkit')->get('test_parameter', FALSE),
-    );
+    ];
     return $form;
   }
 
@@ -117,7 +117,7 @@ public function validateConfigurationForm(array &$form, FormStateInterface $form
    */
   public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
     $this->configFactory->getEditable('system.image.test_toolkit')
-      ->set('test_parameter', $form_state->getValue(array('test', 'test_parameter')))
+      ->set('test_parameter', $form_state->getValue(['test', 'test_parameter']))
       ->save();
   }
 
@@ -165,7 +165,7 @@ public function save($destination) {
    * @see \Drupal\system\Tests\Image\ToolkitTestBase::imageTestGetAllCalls()
    */
   protected function logCall($op, $args) {
-    $results = $this->state->get('image_test.results') ?: array();
+    $results = $this->state->get('image_test.results') ?: [];
     $results[$op][] = $args;
     // A call to apply is also logged under its operation name whereby the
     // array of arguments are logged as separate arguments, this because at the
@@ -236,7 +236,7 @@ public static function isAvailable() {
    * {@inheritdoc}
    */
   public static function getSupportedExtensions() {
-    $extensions = array();
+    $extensions = [];
     foreach (static::supportedTypes() as $image_type) {
       $extensions[] = Unicode::strtolower(image_type_to_extension($image_type, FALSE));
     }
@@ -251,13 +251,13 @@ public static function getSupportedExtensions() {
    *   IMAGETYPE_* constant (e.g. IMAGETYPE_JPEG, IMAGETYPE_PNG, etc.).
    */
   protected static function supportedTypes() {
-    return array(IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF);
+    return [IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function apply($operation, array $arguments = array()) {
+  public function apply($operation, array $arguments = []) {
     $this->logCall('apply', func_get_args());
     return TRUE;
   }
diff --git a/core/modules/system/tests/modules/keyvalue_test/keyvalue_test.module b/core/modules/system/tests/modules/keyvalue_test/keyvalue_test.module
index ed05996058566caf2a3943d234b26e1d6c072b9d..1e7da67fad926a303e69cba21600866d49da42f4 100644
--- a/core/modules/system/tests/modules/keyvalue_test/keyvalue_test.module
+++ b/core/modules/system/tests/modules/keyvalue_test/keyvalue_test.module
@@ -13,6 +13,6 @@ function keyvalue_test_entity_type_alter(array &$entity_types) {
   if (isset($entity_types['entity_test_label'])) {
     $entity_types['entity_test_label']->setStorageClass('Drupal\Core\Entity\KeyValueStore\KeyValueContentEntityStorage');
     $entity_keys = $entity_types['entity_test_label']->getKeys();
-    $entity_types['entity_test_label']->set('entity_keys', $entity_keys + array('uuid' => 'uuid'));
+    $entity_types['entity_test_label']->set('entity_keys', $entity_keys + ['uuid' => 'uuid']);
   }
 }
diff --git a/core/modules/system/tests/modules/menu_test/menu_test.module b/core/modules/system/tests/modules/menu_test/menu_test.module
index f891fce9f35bb92b8eb0b74d4959728a98432b60..79b4dae2bbf84396a91812940c276293cdc1ee42 100644
--- a/core/modules/system/tests/modules/menu_test/menu_test.module
+++ b/core/modules/system/tests/modules/menu_test/menu_test.module
@@ -19,35 +19,35 @@ function menu_test_menu_links_discovered_alter(&$links) {
   $links['menu_test.context']['title'] = \Drupal::config('menu_test.menu_item')->get('title');
 
   // Adds a custom menu link.
-  $links['menu_test.custom'] = array(
+  $links['menu_test.custom'] = [
     'title' => 'Custom link',
     'route_name' => 'menu_test.custom',
     'description' => 'Custom link used to check the integrity of manually added menu links.',
     'parent' => 'menu_test',
-  );
+  ];
 }
 
 /**
  * Implements hook_menu_local_tasks_alter().
  */
 function menu_test_menu_local_tasks_alter(&$data, $route_name, RefinableCacheableDependencyInterface &$cacheability) {
-  if (in_array($route_name, array('menu_test.tasks_default'))) {
-    $data['tabs'][0]['foo'] = array(
+  if (in_array($route_name, ['menu_test.tasks_default'])) {
+    $data['tabs'][0]['foo'] = [
       '#theme' => 'menu_local_task',
-      '#link' => array(
+      '#link' => [
         'title' => "Task 1 <script>alert('Welcome to the jungle!')</script>",
-        'url' => Url::fromRoute('menu_test.router_test1', array('bar' => '1')),
-      ),
+        'url' => Url::fromRoute('menu_test.router_test1', ['bar' => '1']),
+      ],
       '#weight' => 10,
-    );
-    $data['tabs'][0]['bar'] = array(
+    ];
+    $data['tabs'][0]['bar'] = [
       '#theme' => 'menu_local_task',
-      '#link' => array(
+      '#link' => [
         'title' => 'Task 2',
-        'url' => Url::fromRoute('menu_test.router_test2', array('bar' => '2')),
-      ),
+        'url' => Url::fromRoute('menu_test.router_test2', ['bar' => '2']),
+      ],
       '#weight' => 20,
-    );
+    ];
   }
   $cacheability->addCacheTags(['kittens:dwarf-cat']);
 }
diff --git a/core/modules/system/tests/modules/menu_test/src/Controller/MenuTestController.php b/core/modules/system/tests/modules/menu_test/src/Controller/MenuTestController.php
index c0832692c66658bf1fe5460f0a11206e05fcba33..fe6566cddb32a35885c433cc843861ba35040618 100644
--- a/core/modules/system/tests/modules/menu_test/src/Controller/MenuTestController.php
+++ b/core/modules/system/tests/modules/menu_test/src/Controller/MenuTestController.php
@@ -83,8 +83,8 @@ public function menuTestCallback() {
    * @return string
    *   The route title.
    */
-  public function titleCallback(array $_title_arguments = array(), $_title = '') {
-    $_title_arguments += array('case_number' => '2', 'title' => $_title);
+  public function titleCallback(array $_title_arguments = [], $_title = '') {
+    $_title_arguments += ['case_number' => '2', 'title' => $_title];
     return t($_title_arguments['title']) . ' - Case ' . $_title_arguments['case_number'];
   }
 
diff --git a/core/modules/system/tests/modules/menu_test/src/Plugin/Derivative/LocalTaskTest.php b/core/modules/system/tests/modules/menu_test/src/Plugin/Derivative/LocalTaskTest.php
index 10c0810f684f07f154c96b60510f395d764a2cbe..decfd36740e471faefe6502cde3694a6b3ecbc55 100644
--- a/core/modules/system/tests/modules/menu_test/src/Plugin/Derivative/LocalTaskTest.php
+++ b/core/modules/system/tests/modules/menu_test/src/Plugin/Derivative/LocalTaskTest.php
@@ -11,10 +11,10 @@ class LocalTaskTest extends DeriverBase {
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
     $weight = $base_plugin_definition['weight'];
-    foreach (array('derive1' => 'Derive 1', 'derive2' => 'Derive 2') as $key => $title) {
+    foreach (['derive1' => 'Derive 1', 'derive2' => 'Derive 2'] as $key => $title) {
       $this->derivatives[$key] = $base_plugin_definition;
       $this->derivatives[$key]['title'] = $title;
-      $this->derivatives[$key]['route_parameters'] = array('placeholder' => $key);
+      $this->derivatives[$key]['route_parameters'] = ['placeholder' => $key];
       $this->derivatives[$key]['weight'] = $weight++; // ensure weights for testing.
     }
     return $this->derivatives;
diff --git a/core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalAction/TestLocalAction4.php b/core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalAction/TestLocalAction4.php
index efd75799bc0e7da4964ed69be5acef79b698a64a..1f8300a4ba4730d6b8dc3d5e0e922764369c6759 100644
--- a/core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalAction/TestLocalAction4.php
+++ b/core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalAction/TestLocalAction4.php
@@ -16,7 +16,7 @@ class TestLocalAction4 extends LocalActionDefault {
    * {@inheritdoc}
    */
   public function getTitle() {
-    return $this->t('My @arg action', array('@arg' => 'dynamic-title'));
+    return $this->t('My @arg action', ['@arg' => 'dynamic-title']);
   }
 
 }
diff --git a/core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalTask/TestTasksSettingsSub1.php b/core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalTask/TestTasksSettingsSub1.php
index 72ef717c717f18f7ccdc3c3e4033c01c059ddbf0..cadaa9a0c921758fdddd92a48ad6ca4c706832ec 100644
--- a/core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalTask/TestTasksSettingsSub1.php
+++ b/core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalTask/TestTasksSettingsSub1.php
@@ -13,7 +13,7 @@ class TestTasksSettingsSub1 extends LocalTaskDefault {
    * {@inheritdoc}
    */
   function getTitle() {
-    return $this->t('Dynamic title for @class', array('@class' => 'TestTasksSettingsSub1'));
+    return $this->t('Dynamic title for @class', ['@class' => 'TestTasksSettingsSub1']);
   }
 
   /**
diff --git a/core/modules/system/tests/modules/menu_test/src/TestControllers.php b/core/modules/system/tests/modules/menu_test/src/TestControllers.php
index 9ed7851b2a9c7a0227f7765898e8a111ef61d32d..31fb341afb028a5804f4e51a4a77c43e74e4ad38 100644
--- a/core/modules/system/tests/modules/menu_test/src/TestControllers.php
+++ b/core/modules/system/tests/modules/menu_test/src/TestControllers.php
@@ -59,7 +59,7 @@ public function testDerived() {
    */
   public function testDefaults($placeholder = NULL) {
     if ($placeholder) {
-      return ['#markup' => SafeMarkup::format("Sometimes there is a placeholder: '@placeholder'.", array('@placeholder' => $placeholder))];
+      return ['#markup' => SafeMarkup::format("Sometimes there is a placeholder: '@placeholder'.", ['@placeholder' => $placeholder])];
     }
     else {
       return ['#markup' => 'Sometimes there is no placeholder.'];
diff --git a/core/modules/system/tests/modules/module_test/module_test.file.inc b/core/modules/system/tests/modules/module_test/module_test.file.inc
index 0842944ca68595749fa6bdae503dd43877c95052..b40e0f345379bbe591671e923adf1ff66c3b8ef6 100644
--- a/core/modules/system/tests/modules/module_test/module_test.file.inc
+++ b/core/modules/system/tests/modules/module_test/module_test.file.inc
@@ -9,5 +9,5 @@
  * Implements hook_test_hook().
  */
 function module_test_test_hook() {
-  return array('module_test' => 'success!');
+  return ['module_test' => 'success!'];
 }
diff --git a/core/modules/system/tests/modules/module_test/module_test.install b/core/modules/system/tests/modules/module_test/module_test.install
index e90fc577aca3e42892e71687739f91363abdb972..5f3f6f654c9e4891bc8404aca769ee0496160bc6 100644
--- a/core/modules/system/tests/modules/module_test/module_test.install
+++ b/core/modules/system/tests/modules/module_test/module_test.install
@@ -9,18 +9,18 @@
  * Implements hook_schema().
  */
 function module_test_schema() {
-  $schema['module_test'] = array(
+  $schema['module_test'] = [
     'description' => 'Dummy table to test the behavior of hook_schema() during module installation.',
-    'fields' => array(
-      'data' => array(
+    'fields' => [
+      'data' => [
         'type' => 'varchar',
         'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'An example data column for the module.',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
   return $schema;
 }
 
@@ -30,8 +30,8 @@ function module_test_schema() {
 function module_test_install() {
   $schema = drupal_get_module_schema('module_test', 'module_test');
   db_insert('module_test')
-    ->fields(array(
+    ->fields([
       'data' => $schema['fields']['data']['type'],
-    ))
+    ])
     ->execute();
 }
diff --git a/core/modules/system/tests/modules/module_test/module_test.module b/core/modules/system/tests/modules/module_test/module_test.module
index 9c5cd9ac29dd4ba9e46c98b2e32d8c4d6407d148..dba4889d53050b6161d034f39217d8744d17a0a4 100644
--- a/core/modules/system/tests/modules/module_test/module_test.module
+++ b/core/modules/system/tests/modules/module_test/module_test.module
@@ -60,9 +60,9 @@ function module_test_system_info_alter(&$info, Extension $file, $type) {
  * Implements hook_hook_info().
  */
 function module_test_hook_info() {
-  $hooks['test_hook'] = array(
+  $hooks['test_hook'] = [
     'group' => 'file',
-  );
+  ];
   return $hooks;
 }
 
diff --git a/core/modules/system/tests/modules/pager_test/src/Controller/PagerTestController.php b/core/modules/system/tests/modules/pager_test/src/Controller/PagerTestController.php
index 39144c67fce3f85386fee4934b9c436920c2d108..1964f740fe974c6330883637916a7e3f93ff802d 100644
--- a/core/modules/system/tests/modules/pager_test/src/Controller/PagerTestController.php
+++ b/core/modules/system/tests/modules/pager_test/src/Controller/PagerTestController.php
@@ -28,7 +28,7 @@ protected function buildTestTable($element, $limit) {
     ];
     $query = db_select('watchdog', 'd')->extend('Drupal\Core\Database\Query\PagerSelectExtender')->element($element);
     $result = $query
-      ->fields('d', array('wid', 'type', 'timestamp'))
+      ->fields('d', ['wid', 'type', 'timestamp'])
       ->limit($limit)
       ->orderBy('d.wid')
       ->execute();
@@ -58,19 +58,19 @@ public function queryParameters() {
     // Counter of calls to the current pager.
     $query_params = pager_get_query_parameters();
     $pager_calls = isset($query_params['pager_calls']) ? ($query_params['pager_calls'] ? $query_params['pager_calls'] : 0) : 0;
-    $build['l_pager_pager_0'] = array('#markup' => $this->t('Pager calls: @pager_calls', array('@pager_calls' => $pager_calls)));
+    $build['l_pager_pager_0'] = ['#markup' => $this->t('Pager calls: @pager_calls', ['@pager_calls' => $pager_calls])];
 
     // Pager.
-    $build['pager_pager_0'] = array(
+    $build['pager_pager_0'] = [
       '#type' => 'pager',
       '#element' => 0,
-      '#parameters' => array(
+      '#parameters' => [
         'pager_calls' => ++$pager_calls,
-      ),
+      ],
       '#pre_render' => [
         'Drupal\pager_test\Controller\PagerTestController::showPagerCacheContext',
       ]
-    );
+    ];
 
     return $build;
   }
@@ -82,34 +82,34 @@ public function multiplePagers() {
 
     // Build three tables with same query and different pagers.
     $build['pager_table_0'] = $this->buildTestTable(0, 20);
-    $build['pager_pager_0'] = array(
+    $build['pager_pager_0'] = [
       '#type' => 'container',
       '#attributes' => ['class' => ['test-pager-0']],
       'pager' => [
         '#type' => 'pager',
         '#element' => 0,
       ],
-    );
+    ];
 
     $build['pager_table_1'] = $this->buildTestTable(1, 20);
-    $build['pager_pager_1'] = array(
+    $build['pager_pager_1'] = [
       '#type' => 'container',
       '#attributes' => ['class' => ['test-pager-1']],
       'pager' => [
         '#type' => 'pager',
         '#element' => 1,
       ],
-    );
+    ];
 
     $build['pager_table_4'] = $this->buildTestTable(4, 20);
-    $build['pager_pager_4'] = array(
+    $build['pager_pager_4'] = [
       '#type' => 'container',
       '#attributes' => ['class' => ['test-pager-4']],
       'pager' => [
         '#type' => 'pager',
         '#element' => 4,
       ],
-    );
+    ];
 
     return $build;
   }
diff --git a/core/modules/system/tests/modules/path_test/path_test.module b/core/modules/system/tests/modules/path_test/path_test.module
index df03931255d4d966b3fe855727dd2418378c7c62..32489c021f5b562a6fa225ed8542dce964d2516f 100644
--- a/core/modules/system/tests/modules/path_test/path_test.module
+++ b/core/modules/system/tests/modules/path_test/path_test.module
@@ -9,14 +9,14 @@
  * Resets the path test results.
  */
 function path_test_reset() {
-  \Drupal::state()->set('path_test.results', array());
+  \Drupal::state()->set('path_test.results', []);
 }
 
 /**
  * Implements hook_path_update().
  */
 function path_test_path_update($path) {
-  $results = \Drupal::state()->get('path_test.results') ?: array();
+  $results = \Drupal::state()->get('path_test.results') ?: [];
   $results['hook_path_update'] = $path;
   \Drupal::state()->set('path_test.results', $results);
 }
diff --git a/core/modules/system/tests/modules/plugin_test/src/Plugin/Annotation/PluginExample.php b/core/modules/system/tests/modules/plugin_test/src/Plugin/Annotation/PluginExample.php
index daca83bae6603e4f8b92618dc3087259ea2e5d58..b80460d6919f21ac260684cf9e1dd9519df235e4 100644
--- a/core/modules/system/tests/modules/plugin_test/src/Plugin/Annotation/PluginExample.php
+++ b/core/modules/system/tests/modules/plugin_test/src/Plugin/Annotation/PluginExample.php
@@ -29,12 +29,12 @@ class PluginExample extends AnnotationBase {
    * {@inheritdoc}
    */
   public function get() {
-    return array(
+    return [
       'id' => $this->id,
       'custom' => $this->custom,
       'class' => $this->class,
       'provider' => $this->provider,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/system/tests/modules/plugin_test/src/Plugin/DefaultsTestPluginManager.php b/core/modules/system/tests/modules/plugin_test/src/Plugin/DefaultsTestPluginManager.php
index eda8f8845eaf3e72347784faa89c174e2d699fed..65d7078ceb69638bb8fa0a2c13988b0031b7fbd0 100644
--- a/core/modules/system/tests/modules/plugin_test/src/Plugin/DefaultsTestPluginManager.php
+++ b/core/modules/system/tests/modules/plugin_test/src/Plugin/DefaultsTestPluginManager.php
@@ -28,27 +28,27 @@ public function __construct(ModuleHandlerInterface $module_handler) {
     $this->moduleHandler = $module_handler;
 
     // Specify default values.
-    $this->defaults = array(
-      'metadata' => array(
+    $this->defaults = [
+      'metadata' => [
         'default' => TRUE,
-      ),
-    );
+      ],
+    ];
 
     // Add a plugin with a custom value.
-    $this->discovery->setDefinition('test_block1', array(
+    $this->discovery->setDefinition('test_block1', [
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockTestBlock',
-      'metadata' => array(
+      'metadata' => [
         'custom' => TRUE,
-      ),
-    ));
+      ],
+    ]);
     // Add a plugin that overrides the default value.
-    $this->discovery->setDefinition('test_block2', array(
+    $this->discovery->setDefinition('test_block2', [
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockTestBlock',
-      'metadata' => array(
+      'metadata' => [
         'custom' => TRUE,
         'default' => FALSE,
-      ),
-    ));
+      ],
+    ]);
   }
 
 }
diff --git a/core/modules/system/tests/modules/plugin_test/src/Plugin/MockBlockManager.php b/core/modules/system/tests/modules/plugin_test/src/Plugin/MockBlockManager.php
index db4a05282d3a24c7e1d05ee65d5d19967c17eebc..8748a7b943470546dfbc104dfb511a27581d74e7 100644
--- a/core/modules/system/tests/modules/plugin_test/src/Plugin/MockBlockManager.php
+++ b/core/modules/system/tests/modules/plugin_test/src/Plugin/MockBlockManager.php
@@ -34,11 +34,11 @@ public function __construct() {
     // plugins to the system.
 
     // A simple plugin: the user login block.
-    $this->discovery->setDefinition('user_login', array(
+    $this->discovery->setDefinition('user_login', [
       'id' => 'user_login',
       'label' => t('User login'),
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserLoginBlock',
-    ));
+    ]);
 
     // A plugin that requires derivatives: the menu block plugin. We do not want
     // a generic "Menu" block showing up in the Block administration UI.
@@ -46,17 +46,17 @@ public function __construct() {
     // system and each one's title is user configurable. The
     // MockMenuBlockDeriver class ensures that only derivatives, and not the
     // base plugin, are available to the system.
-    $this->discovery->setDefinition('menu', array(
+    $this->discovery->setDefinition('menu', [
       'id' => 'menu',
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockMenuBlock',
       'deriver' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockMenuBlockDeriver',
-    ));
+    ]);
     // A plugin defining itself as a derivative.
-    $this->discovery->setDefinition('menu:foo', array(
+    $this->discovery->setDefinition('menu:foo', [
       'id' => 'menu',
       'label' => t('Base label'),
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockMenuBlock',
-    ));
+    ]);
 
     // A block plugin that can optionally be derived: the layout block plugin.
     // A layout is a special kind of block into which other blocks can be
@@ -64,51 +64,51 @@ public function __construct() {
     // administration UI as well as additional user-created custom layouts. The
     // MockLayoutBlockDeriver class ensures that both the base plugin and the
     // derivatives are available to the system.
-    $this->discovery->setDefinition('layout', array(
+    $this->discovery->setDefinition('layout', [
       'id' => 'layout',
       'label' => t('Layout'),
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockLayoutBlock',
       'deriver' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockLayoutBlockDeriver',
-    ));
+    ]);
 
     // A block plugin that requires context to function. This block requires a
     // user object in order to return the user name from the getTitle() method.
-    $this->discovery->setDefinition('user_name', array(
+    $this->discovery->setDefinition('user_name', [
       'id' => 'user_name',
       'label' => t('User name'),
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserNameBlock',
-      'context' => array(
+      'context' => [
         'user' => $this->createContextDefinition('entity:user', t('User')),
-      ),
-    ));
+      ],
+    ]);
 
     // An optional context version of the previous block plugin.
-    $this->discovery->setDefinition('user_name_optional', array(
+    $this->discovery->setDefinition('user_name_optional', [
       'id' => 'user_name_optional',
       'label' => t('User name optional'),
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserNameBlock',
-      'context' => array(
+      'context' => [
         'user' => $this->createContextDefinition('entity:user', t('User'), FALSE),
-      ),
-    ));
+      ],
+    ]);
 
     // A block plugin that requires a typed data string context to function.
-    $this->discovery->setDefinition('string_context', array(
+    $this->discovery->setDefinition('string_context', [
       'id' => 'string_context',
       'label' => t('String typed data'),
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\TypedDataStringBlock',
-    ));
+    ]);
 
     // A complex context plugin that requires both a user and node for context.
-    $this->discovery->setDefinition('complex_context', array(
+    $this->discovery->setDefinition('complex_context', [
       'id' => 'complex_context',
       'label' => t('Complex context'),
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockComplexContextBlock',
-      'context' => array(
+      'context' => [
         'user' => $this->createContextDefinition('entity:user', t('User')),
         'node' => $this->createContextDefinition('entity:node', t('Node')),
-      ),
-    ));
+      ],
+    ]);
 
     // In addition to finding all of the plugins available for a type, a plugin
     // type must also be able to create instances of that plugin. For example, a
diff --git a/core/modules/system/tests/modules/plugin_test/src/Plugin/TestLazyPluginCollection.php b/core/modules/system/tests/modules/plugin_test/src/Plugin/TestLazyPluginCollection.php
index dd426e481a3add7e9b950c7509a98e46aa09e65c..1009faa5404b32aa72c430866cefcde5ea44f516 100644
--- a/core/modules/system/tests/modules/plugin_test/src/Plugin/TestLazyPluginCollection.php
+++ b/core/modules/system/tests/modules/plugin_test/src/Plugin/TestLazyPluginCollection.php
@@ -34,14 +34,14 @@ public function __construct(PluginManagerInterface $manager) {
    * {@inheritdoc}
    */
   protected function initializePlugin($instance_id) {
-    $this->pluginInstances[$instance_id] = $this->manager->createInstance($instance_id, array());
+    $this->pluginInstances[$instance_id] = $this->manager->createInstance($instance_id, []);
   }
 
   /**
    * {@inheritdoc}
    */
   public function getConfiguration() {
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/system/tests/modules/plugin_test/src/Plugin/TestPluginManager.php b/core/modules/system/tests/modules/plugin_test/src/Plugin/TestPluginManager.php
index 60e74d839418abce081470365d9ef0d421483a72..ec464a5b7ae84e84521badeae7b73d33da486446 100644
--- a/core/modules/system/tests/modules/plugin_test/src/Plugin/TestPluginManager.php
+++ b/core/modules/system/tests/modules/plugin_test/src/Plugin/TestPluginManager.php
@@ -19,10 +19,10 @@ public function __construct() {
     $this->discovery = new StaticDiscovery();
 
     // A simple plugin: a mock user login block.
-    $this->discovery->setDefinition('user_login', array(
+    $this->discovery->setDefinition('user_login', [
       'label' => 'User login',
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserLoginBlock',
-    ));
+    ]);
 
     // In addition to finding all of the plugins available for a type, a plugin
     // type must also be able to create instances of that plugin. For example, a
diff --git a/core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/MockLayoutBlockDeriver.php b/core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/MockLayoutBlockDeriver.php
index d2fa3a46ced4fe538d5d20281bb52362d426abe0..93fca538b885856aad12dc2940953470e1e1849d 100644
--- a/core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/MockLayoutBlockDeriver.php
+++ b/core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/MockLayoutBlockDeriver.php
@@ -31,7 +31,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
     // key from the returned definitions.
     unset($base_plugin_definition['deriver']);
 
-    $derivatives = array(
+    $derivatives = [
       // Adding a NULL key signifies that the base plugin may also be used in
       // addition to the derivatives. In this case, we allow the administrator
       // to add a generic layout block to the page.
@@ -40,10 +40,10 @@ public function getDerivativeDefinitions($base_plugin_definition) {
       // We also allow them to add a customized one. Here, we just mock the
       // customized one, but in a real implementation, this would be fetched
       // from some \Drupal::config() object.
-      'foo' => array(
+      'foo' => [
         'label' => t('Layout Foo'),
-      ) + $base_plugin_definition,
-    );
+      ] + $base_plugin_definition,
+    ];
 
     return $derivatives;
   }
diff --git a/core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/MockMenuBlockDeriver.php b/core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/MockMenuBlockDeriver.php
index 413eb1335518712536fa65371ecee2d90debc8b3..d5f6d6c2937e596651466ae30b49142f7a5cc542 100644
--- a/core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/MockMenuBlockDeriver.php
+++ b/core/modules/system/tests/modules/plugin_test/src/Plugin/plugin_test/mock_block/MockMenuBlockDeriver.php
@@ -34,20 +34,20 @@ public function getDerivativeDefinitions($base_plugin_definition) {
     // Here, we create some mock menu block definitions for menus that might
     // exist in a typical Drupal site. In a real implementation, we would query
     // Drupal's configuration to find out which menus actually exist.
-    $derivatives = array(
-      'main_menu' => array(
+    $derivatives = [
+      'main_menu' => [
         'label' => t('Main menu'),
-      ) + $base_plugin_definition,
-      'navigation' => array(
+      ] + $base_plugin_definition,
+      'navigation' => [
         'label' => t('Navigation'),
-      ) + $base_plugin_definition,
-      'foo' => array(
+      ] + $base_plugin_definition,
+      'foo' => [
         // Instead of the derivative label, the specific label will be used.
         'label' => t('Derivative label'),
         // This setting will be merged in.
          'setting' => 'default'
-      ) + $base_plugin_definition,
-    );
+      ] + $base_plugin_definition,
+    ];
 
     return $derivatives;
   }
diff --git a/core/modules/system/tests/modules/requirements1_test/requirements1_test.install b/core/modules/system/tests/modules/requirements1_test/requirements1_test.install
index c88489399d67dea5c5210a586ab0741955a44594..e8121617adc38393509c67fd4abb6e8fbc28537e 100644
--- a/core/modules/system/tests/modules/requirements1_test/requirements1_test.install
+++ b/core/modules/system/tests/modules/requirements1_test/requirements1_test.install
@@ -9,15 +9,15 @@
  * Implements hook_requirements().
  */
 function requirements1_test_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
 
   // Always fails requirements.
   if ('install' == $phase) {
-    $requirements['requirements1_test'] = array(
+    $requirements['requirements1_test'] = [
       'title' => t('Requirements 1 Test'),
       'severity' => REQUIREMENT_ERROR,
       'description' => t('Requirements 1 Test failed requirements.'),
-    );
+    ];
   }
 
   return $requirements;
diff --git a/core/modules/system/tests/modules/router_test_directory/src/RouterTestServiceProvider.php b/core/modules/system/tests/modules/router_test_directory/src/RouterTestServiceProvider.php
index 7635704fb3b3f32f47a140e9bf89aa425afc0a94..5430e8d8bcabaa1313b9d0763b9fd01c808e8e94 100644
--- a/core/modules/system/tests/modules/router_test_directory/src/RouterTestServiceProvider.php
+++ b/core/modules/system/tests/modules/router_test_directory/src/RouterTestServiceProvider.php
@@ -16,7 +16,7 @@ class RouterTestServiceProvider implements ServiceProviderInterface {
   public function register(ContainerBuilder $container) {
     $container->register('router_test.subscriber', 'Drupal\router_test\RouteTestSubscriber')->addTag('event_subscriber');
     $container->register('access_check.router_test', 'Drupal\router_test\Access\TestAccessCheck')
-      ->addTag('access_check', array('applies_to' => '_access_router_test'));
+      ->addTag('access_check', ['applies_to' => '_access_router_test']);
   }
 
 }
diff --git a/core/modules/system/tests/modules/router_test_directory/src/TestContent.php b/core/modules/system/tests/modules/router_test_directory/src/TestContent.php
index 9cbe023ab12eb489286bad2e74a3ad9c9e85c2ca..f392a81e85e3a8b7c1486dce42450b24348f0f51 100644
--- a/core/modules/system/tests/modules/router_test_directory/src/TestContent.php
+++ b/core/modules/system/tests/modules/router_test_directory/src/TestContent.php
@@ -63,7 +63,7 @@ public function testAccount(UserInterface $user) {
    */
   public function subrequestTest(UserInterface $user) {
     $request = \Drupal::request();
-    $request = Request::create('/router_test/test13/' . $user->id(), 'GET', $request->query->all(), $request->cookies->all(), array(), $request->server->all());
+    $request = Request::create('/router_test/test13/' . $user->id(), 'GET', $request->query->all(), $request->cookies->all(), [], $request->server->all());
 
     return $this->httpKernel->handle($request, HttpKernelInterface::SUB_REQUEST);
   }
diff --git a/core/modules/system/tests/modules/service_provider_test/src/TestClass.php b/core/modules/system/tests/modules/service_provider_test/src/TestClass.php
index 9a87c9721df679e3fcae98ba034ff474a57b93c0..542239faa324fa7b2c1c9d794f975aaa30600a0d 100644
--- a/core/modules/system/tests/modules/service_provider_test/src/TestClass.php
+++ b/core/modules/system/tests/modules/service_provider_test/src/TestClass.php
@@ -58,8 +58,8 @@ public function onKernelResponseTest(FilterResponseEvent $event) {
    *   An array of event listener definitions.
    */
   static function getSubscribedEvents() {
-    $events[KernelEvents::REQUEST][] = array('onKernelRequestTest');
-    $events[KernelEvents::RESPONSE][] = array('onKernelResponseTest');
+    $events[KernelEvents::REQUEST][] = ['onKernelRequestTest'];
+    $events[KernelEvents::RESPONSE][] = ['onKernelResponseTest'];
     return $events;
   }
 
diff --git a/core/modules/system/tests/modules/session_test/src/Controller/SessionTestController.php b/core/modules/system/tests/modules/session_test/src/Controller/SessionTestController.php
index edde4fd9af446c89b060ddc5d9f51c89069a8222..76a54629425e1347f93dd4e0a3e9fab2e5a5130b 100644
--- a/core/modules/system/tests/modules/session_test/src/Controller/SessionTestController.php
+++ b/core/modules/system/tests/modules/session_test/src/Controller/SessionTestController.php
@@ -21,7 +21,7 @@ class SessionTestController extends ControllerBase {
   public function get() {
     return empty($_SESSION['session_test_value'])
       ? []
-      : ['#markup' => $this->t('The current value of the stored session variable is: %val', array('%val' => $_SESSION['session_test_value']))];
+      : ['#markup' => $this->t('The current value of the stored session variable is: %val', ['%val' => $_SESSION['session_test_value']])];
   }
 
   /**
@@ -37,7 +37,7 @@ public function getFromSessionObject(Request $request) {
     $value = $request->getSession()->get("session_test_key");
     return empty($value)
       ? []
-      : ['#markup' => $this->t('The current value of the stored session variable is: %val', array('%val' => $value))];
+      : ['#markup' => $this->t('The current value of the stored session variable is: %val', ['%val' => $value])];
   }
 
   /**
@@ -84,7 +84,7 @@ public function getIdFromCookie(Request $request) {
   public function set($test_value) {
     $_SESSION['session_test_value'] = $test_value;
 
-    return ['#markup' => $this->t('The current value of the stored session variable has been set to %val', array('%val' => $test_value))];
+    return ['#markup' => $this->t('The current value of the stored session variable has been set to %val', ['%val' => $test_value])];
   }
 
   /**
@@ -100,7 +100,7 @@ public function set($test_value) {
   public function noSet($test_value) {
     \Drupal::service('session_handler.write_safe')->setSessionWritable(FALSE);
     $this->set($test_value);
-    return ['#markup' => $this->t('session saving was disabled, and then %val was set', array('%val' => $test_value))];
+    return ['#markup' => $this->t('session saving was disabled, and then %val was set', ['%val' => $test_value])];
   }
 
   /**
diff --git a/core/modules/system/tests/modules/session_test/src/EventSubscriber/SessionTestSubscriber.php b/core/modules/system/tests/modules/session_test/src/EventSubscriber/SessionTestSubscriber.php
index ee03668ea8540c406f61e0d71df816a2e42d98b4..47c8c5b110ec217b25aeacca21125deef17ee7ab 100644
--- a/core/modules/system/tests/modules/session_test/src/EventSubscriber/SessionTestSubscriber.php
+++ b/core/modules/system/tests/modules/session_test/src/EventSubscriber/SessionTestSubscriber.php
@@ -49,8 +49,8 @@ public function onKernelResponseSessionTest(FilterResponseEvent $event) {
    *   An array of event listener definitions.
    */
   public static function getSubscribedEvents() {
-    $events[KernelEvents::RESPONSE][] = array('onKernelResponseSessionTest');
-    $events[KernelEvents::REQUEST][] = array('onKernelRequestSessionTest');
+    $events[KernelEvents::RESPONSE][] = ['onKernelResponseSessionTest'];
+    $events[KernelEvents::REQUEST][] = ['onKernelRequestSessionTest'];
     return $events;
   }
 
diff --git a/core/modules/system/tests/modules/session_test/src/Form/SessionTestForm.php b/core/modules/system/tests/modules/session_test/src/Form/SessionTestForm.php
index 70c4f8347232e2155f8d057e8b9946314a4306e6..bf250ac4524f68193ce84a5d48438302aa19e979 100644
--- a/core/modules/system/tests/modules/session_test/src/Form/SessionTestForm.php
+++ b/core/modules/system/tests/modules/session_test/src/Form/SessionTestForm.php
@@ -22,17 +22,17 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['input'] = array(
+    $form['input'] = [
       '#type' => 'textfield',
       '#title' => 'Input',
       '#required' => TRUE,
-    );
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save',
-    );
+    ];
 
     return $form;
   }
@@ -41,7 +41,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    drupal_set_message(SafeMarkup::format('Ok: @input', array('@input' => $form_state->getValue('input'))));
+    drupal_set_message(SafeMarkup::format('Ok: @input', ['@input' => $form_state->getValue('input')]));
   }
 
 }
diff --git a/core/modules/system/tests/modules/system_test/src/Controller/SystemTestController.php b/core/modules/system/tests/modules/system_test/src/Controller/SystemTestController.php
index 8ef6457cb294c2069561df134f51930fcc16a2e2..5e49c2403b677defc9e641483d6f39c2556ee4ed 100644
--- a/core/modules/system/tests/modules/system_test/src/Controller/SystemTestController.php
+++ b/core/modules/system/tests/modules/system_test/src/Controller/SystemTestController.php
@@ -206,15 +206,15 @@ public function lockPersist($lock_name) {
    * Set cache tag on on the returned render array.
    */
   public function system_test_cache_tags_page() {
-    $build['main'] = array(
-      '#cache' => array('tags' => array('system_test_cache_tags_page')),
-      '#pre_render' => array(
+    $build['main'] = [
+      '#cache' => ['tags' => ['system_test_cache_tags_page']],
+      '#pre_render' => [
         '\Drupal\system_test\Controller\SystemTestController::preRenderCacheTags',
-      ),
-      'message' => array(
+      ],
+      'message' => [
         '#markup' => 'Cache tags page example',
-      ),
-    );
+      ],
+    ];
     return $build;
   }
 
@@ -222,12 +222,12 @@ public function system_test_cache_tags_page() {
    * Set cache max-age on the returned render array.
    */
   public function system_test_cache_maxage_page() {
-    $build['main'] = array(
-      '#cache' => array('max-age' => 90),
-      'message' => array(
+    $build['main'] = [
+      '#cache' => ['max-age' => 90],
+      'message' => [
         '#markup' => 'Cache max-age page example',
-      ),
-    );
+      ],
+    ];
     return $build;
   }
 
@@ -245,8 +245,8 @@ public static function preRenderCacheTags($elements) {
    * @see system_authorized_init()
    */
   public function authorizeInit($page_title) {
-    $authorize_url = Url::fromUri('base:core/authorize.php', array('absolute' => TRUE))->toString();
-    system_authorized_init('system_test_authorize_run', __DIR__ . '/../../system_test.module', array(), $page_title);
+    $authorize_url = Url::fromUri('base:core/authorize.php', ['absolute' => TRUE])->toString();
+    system_authorized_init('system_test_authorize_run', __DIR__ . '/../../system_test.module', [], $page_title);
     return new RedirectResponse($authorize_url);
   }
 
@@ -258,7 +258,7 @@ public function setHeader(Request $request) {
     $response = new CacheableResponse();
     $response->headers->set($query['name'], $query['value']);
     $response->getCacheableMetadata()->addCacheContexts(['url.query_args:name', 'url.query_args:value']);
-    $response->setContent($this->t('The following header was set: %name: %value', array('%name' => $query['name'], '%value' => $query['value'])));
+    $response->setContent($this->t('The following header was set: %name: %value', ['%name' => $query['name'], '%value' => $query['value']]));
 
     return $response;
   }
diff --git a/core/modules/system/tests/modules/system_test/src/MockFileTransfer.php b/core/modules/system/tests/modules/system_test/src/MockFileTransfer.php
index de065af25773c8911d81d0f5fa5a2c2942af5513..b7ea3f21e5ced62f1ad89fc7a59300e98f9e8ae2 100644
--- a/core/modules/system/tests/modules/system_test/src/MockFileTransfer.php
+++ b/core/modules/system/tests/modules/system_test/src/MockFileTransfer.php
@@ -21,11 +21,11 @@ public static function factory() {
    * Returns a settings form with a text field to input a username.
    */
   public function getSettingsForm() {
-    $form = array();
-    $form['system_test_username'] = array(
+    $form = [];
+    $form['system_test_username'] = [
       '#type' => 'textfield',
       '#title' => t('System Test Username'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/system/tests/modules/system_test/system_test.module b/core/modules/system/tests/modules/system_test/system_test.module
index 04fa2daaf4af2d25546ba2b0e4cdfed3fcce3757..81739086c32701545c98b072e42860c1fcc6abd0 100644
--- a/core/modules/system/tests/modules/system_test/system_test.module
+++ b/core/modules/system/tests/modules/system_test/system_test.module
@@ -27,7 +27,7 @@ function system_test_help($route_name, RouteMatchInterface $route_match) {
 function system_test_modules_installed($modules) {
   if (\Drupal::state()->get('system_test.verbose_module_hooks')) {
     foreach ($modules as $module) {
-      drupal_set_message(t('hook_modules_installed fired for @module', array('@module' => $module)));
+      drupal_set_message(t('hook_modules_installed fired for @module', ['@module' => $module]));
     }
   }
 }
@@ -38,7 +38,7 @@ function system_test_modules_installed($modules) {
 function system_test_modules_uninstalled($modules) {
   if (\Drupal::state()->get('system_test.verbose_module_hooks')) {
     foreach ($modules as $module) {
-      drupal_set_message(t('hook_modules_uninstalled fired for @module', array('@module' => $module)));
+      drupal_set_message(t('hook_modules_uninstalled fired for @module', ['@module' => $module]));
     }
   }
 }
@@ -66,12 +66,12 @@ function system_test_system_info_alter(&$info, Extension $file, $type) {
   if ($file->getName() == 'system_dependencies_test') {
     $info['hidden'] = FALSE;
   }
-  if (in_array($file->getName(), array(
+  if (in_array($file->getName(), [
     'system_incompatible_module_version_dependencies_test',
     'system_incompatible_core_version_dependencies_test',
     'system_incompatible_module_version_test',
     'system_incompatible_core_version_test',
-  ))) {
+  ])) {
     $info['hidden'] = FALSE;
   }
   if ($file->getName() == 'requirements1_test' || $file->getName() == 'requirements2_test') {
@@ -99,7 +99,7 @@ function system_test_page_attachments(array &$page) {
  */
 function _system_test_first_shutdown_function($arg1, $arg2) {
   // Set something to ensure that this function got called.
-  \Drupal::state()->set('_system_test_first_shutdown_function', array($arg1, $arg2));
+  \Drupal::state()->set('_system_test_first_shutdown_function', [$arg1, $arg2]);
   drupal_register_shutdown_function('_system_test_second_shutdown_function', $arg1, $arg2);
 }
 
@@ -108,7 +108,7 @@ function _system_test_first_shutdown_function($arg1, $arg2) {
  */
 function _system_test_second_shutdown_function($arg1, $arg2) {
   // Set something to ensure that this function got called.
-  \Drupal::state()->set('_system_test_second_shutdown_function', array($arg1, $arg2));
+  \Drupal::state()->set('_system_test_second_shutdown_function', [$arg1, $arg2]);
 
   // Throw an exception with an HTML tag. Since this is called in a shutdown
   // function, it will not bubble up to the default exception handler but will
@@ -121,13 +121,13 @@ function _system_test_second_shutdown_function($arg1, $arg2) {
  * Implements hook_filetransfer_info().
  */
 function system_test_filetransfer_info() {
-  return array(
-    'system_test' => array(
+  return [
+    'system_test' => [
       'title' => t('System Test FileTransfer'),
       'class' => 'Drupal\system_test\MockFileTransfer',
       'weight' => -10,
-    ),
-  );
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/system/tests/modules/test_page_test/src/Controller/Test.php b/core/modules/system/tests/modules/test_page_test/src/Controller/Test.php
index 7ec5fc0ce3615e963f4fe08e7f7a2d5c311b83a8..2de84e959361a1ad71d94b61622890384416ac33 100644
--- a/core/modules/system/tests/modules/test_page_test/src/Controller/Test.php
+++ b/core/modules/system/tests/modules/test_page_test/src/Controller/Test.php
@@ -15,7 +15,7 @@ class Test {
    *   A render array as expected by drupal_render()
    */
   public function renderTitle() {
-    $build = array();
+    $build = [];
     $build['#markup'] = 'Hello Drupal';
     $build['#title'] = 'Foo';
 
@@ -29,7 +29,7 @@ public function renderTitle() {
    *   A render array as expected by drupal_render().
    */
   public function staticTitle() {
-    $build = array();
+    $build = [];
     $build['#markup'] = 'Hello Drupal';
 
     return $build;
@@ -66,9 +66,9 @@ public function controllerWithCache() {
    *   A render array as expected by drupal_render()
    */
   public function renderPage() {
-    return array(
+    return [
       '#markup' => 'Content',
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/system/tests/modules/theme_suggestions_test/theme_suggestions_test.module b/core/modules/system/tests/modules/theme_suggestions_test/theme_suggestions_test.module
index 974856ad2aeb63a7f532189a061c7b3a21a4f80f..50fb86d2b83f6e4ca3e5eeabe15d248ee47daa52 100644
--- a/core/modules/system/tests/modules/theme_suggestions_test/theme_suggestions_test.module
+++ b/core/modules/system/tests/modules/theme_suggestions_test/theme_suggestions_test.module
@@ -9,11 +9,11 @@
  * Implements hook_theme().
  */
 function theme_suggestions_test_theme() {
-  $items['theme_suggestions_test_include'] = array(
+  $items['theme_suggestions_test_include'] = [
     'file' => 'theme_suggestions_test.inc',
-    'variables' => array(),
+    'variables' => [],
     'function' => 'theme_theme_suggestions_test_include',
-  );
+  ];
   return $items;
 }
 
diff --git a/core/modules/system/tests/modules/theme_test/src/EventSubscriber/ThemeTestSubscriber.php b/core/modules/system/tests/modules/theme_test/src/EventSubscriber/ThemeTestSubscriber.php
index d5f9110a7f7b48631a522ebfcc895b3c10ca36f2..650d44d412b831f4cd6a4f21ec2ba4033661a1ee 100644
--- a/core/modules/system/tests/modules/theme_test/src/EventSubscriber/ThemeTestSubscriber.php
+++ b/core/modules/system/tests/modules/theme_test/src/EventSubscriber/ThemeTestSubscriber.php
@@ -63,11 +63,11 @@ public function onRequest(GetResponseEvent $event) {
       // theme_test_request_listener_page_callback() to test that even when the
       // theme system is initialized this early, it is still capable of
       // returning output and theming the page as a whole.
-      $more_link = array(
+      $more_link = [
         '#type' => 'more_link',
         '#url' => Url::fromRoute('user.page'),
-        '#attributes' => array('title' => 'Themed output generated in a KernelEvents::REQUEST listener'),
-      );
+        '#attributes' => ['title' => 'Themed output generated in a KernelEvents::REQUEST listener'],
+      ];
       $GLOBALS['theme_test_output'] = $this->renderer->renderPlain($more_link);
     }
   }
@@ -77,9 +77,9 @@ public function onRequest(GetResponseEvent $event) {
    */
   public function onView(GetResponseEvent $event) {
     $current_route = $this->currentRouteMatch->getRouteName();
-    $entity_autcomplete_route = array(
+    $entity_autcomplete_route = [
       'system.entity_autocomplete',
-    );
+    ];
 
     if (in_array($current_route, $entity_autcomplete_route)) {
       if ($this->container->initialized('theme.registry')) {
@@ -92,8 +92,8 @@ public function onView(GetResponseEvent $event) {
    * {@inheritdoc}
    */
   static function getSubscribedEvents() {
-    $events[KernelEvents::REQUEST][] = array('onRequest');
-    $events[KernelEvents::VIEW][] = array('onView', -1000);
+    $events[KernelEvents::REQUEST][] = ['onRequest'];
+    $events[KernelEvents::VIEW][] = ['onView', -1000];
     return $events;
   }
 
diff --git a/core/modules/system/tests/modules/theme_test/src/ThemeTestController.php b/core/modules/system/tests/modules/theme_test/src/ThemeTestController.php
index 639f1b7438fa12b268fe6b5120375204735fbe89..89cd3821539ae626f2fe9f377b11dffe0cc5fe39 100644
--- a/core/modules/system/tests/modules/theme_test/src/ThemeTestController.php
+++ b/core/modules/system/tests/modules/theme_test/src/ThemeTestController.php
@@ -17,9 +17,9 @@ class ThemeTestController extends ControllerBase {
    *   Render array containing a theme.
    */
   public function functionTemplateOverridden() {
-    return array(
+    return [
       '#theme' => 'theme_test_function_template_override',
-    );
+    ];
   }
 
   /**
@@ -29,13 +29,13 @@ public function functionTemplateOverridden() {
    *   A render array containing custom stylesheets.
    */
   public function testInfoStylesheets() {
-    return array(
-      '#attached' => array(
-        'library' => array(
+    return [
+      '#attached' => [
+        'library' => [
           'theme_test/theme_stylesheets_override_and_remove_test',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -45,7 +45,7 @@ public function testInfoStylesheets() {
    *   A render array containing a theme override.
    */
   public function testTemplate() {
-    return ['#markup' => \Drupal::theme()->render('theme_test_template_test', array())];
+    return ['#markup' => \Drupal::theme()->render('theme_test_template_test', [])];
   }
 
   /**
@@ -55,12 +55,12 @@ public function testTemplate() {
    *   A render array containing an inline template.
    */
   public function testInlineTemplate() {
-    $element = array();
-    $element['test'] = array(
+    $element = [];
+    $element['test'] = [
       '#type' => 'inline_template',
       '#template' => 'test-with-context {{ llama }}',
-      '#context' => array('llama' => 'muuh'),
-    );
+      '#context' => ['llama' => 'muuh'],
+    ];
     return $element;
   }
 
@@ -71,7 +71,7 @@ public function testInlineTemplate() {
    *   An HTML string containing the themed output.
    */
   public function testSuggestion() {
-    return ['#markup' => \Drupal::theme()->render(array('theme_test__suggestion', 'theme_test'), array())];
+    return ['#markup' => \Drupal::theme()->render(['theme_test__suggestion', 'theme_test'], [])];
   }
 
   /**
@@ -88,35 +88,35 @@ public function testRequestListener() {
    * Menu callback for testing suggestion alter hooks with template files.
    */
   function suggestionProvided() {
-    return array('#theme' => 'theme_test_suggestion_provided');
+    return ['#theme' => 'theme_test_suggestion_provided'];
   }
 
   /**
    * Menu callback for testing suggestion alter hooks with template files.
    */
   function suggestionAlter() {
-    return array('#theme' => 'theme_test_suggestions');
+    return ['#theme' => 'theme_test_suggestions'];
   }
 
   /**
    * Menu callback for testing hook_theme_suggestions_alter().
    */
   function generalSuggestionAlter() {
-    return array('#theme' => 'theme_test_general_suggestions');
+    return ['#theme' => 'theme_test_general_suggestions'];
   }
 
   /**
    * Menu callback for testing suggestion alter hooks with specific suggestions.
    */
   function specificSuggestionAlter() {
-    return array('#theme' => 'theme_test_specific_suggestions__variant');
+    return ['#theme' => 'theme_test_specific_suggestions__variant'];
   }
 
   /**
    * Menu callback for testing suggestion alter hooks with theme functions.
    */
   function functionSuggestionAlter() {
-    return array('#theme' => 'theme_test_function_suggestions');
+    return ['#theme' => 'theme_test_function_suggestions'];
   }
 
 
@@ -124,7 +124,7 @@ function functionSuggestionAlter() {
    * Menu callback for testing includes with suggestion alter hooks.
    */
   function suggestionAlterInclude() {
-    return array('#theme' => 'theme_test_suggestions_include');
+    return ['#theme' => 'theme_test_suggestions_include'];
   }
 
   /**
diff --git a/core/modules/system/tests/modules/theme_test/theme_test.module b/core/modules/system/tests/modules/theme_test/theme_test.module
index 540185ec9ba29c3bef1a305c3f3ba5d0a6e5fdf1..2e6f1647335aead30a27bb982df8eacf886dc321 100644
--- a/core/modules/system/tests/modules/theme_test/theme_test.module
+++ b/core/modules/system/tests/modules/theme_test/theme_test.module
@@ -11,55 +11,55 @@
  * Implements hook_theme().
  */
 function theme_test_theme($existing, $type, $theme, $path) {
-  $items['theme_test'] = array(
+  $items['theme_test'] = [
     'file' => 'theme_test.inc',
-    'variables' => array('foo' => ''),
+    'variables' => ['foo' => ''],
     'function' => 'theme_theme_test',
-  );
-  $items['theme_test_template_test'] = array(
+  ];
+  $items['theme_test_template_test'] = [
     'template' => 'theme_test.template_test',
-  );
-  $items['theme_test_template_test_2'] = array(
+  ];
+  $items['theme_test_template_test_2'] = [
     'template' => 'theme_test.template_test',
-  );
-  $items['theme_test_suggestion_provided'] = array(
-    'variables' => array(),
-  );
-  $items['theme_test_specific_suggestions'] = array(
-    'variables' => array(),
-  );
-  $items['theme_test_suggestions'] = array(
-    'variables' => array(),
-  );
-  $items['theme_test_general_suggestions'] = array(
-    'variables' => array(),
-  );
-  $items['theme_test_function_suggestions'] = array(
-    'variables' => array(),
+  ];
+  $items['theme_test_suggestion_provided'] = [
+    'variables' => [],
+  ];
+  $items['theme_test_specific_suggestions'] = [
+    'variables' => [],
+  ];
+  $items['theme_test_suggestions'] = [
+    'variables' => [],
+  ];
+  $items['theme_test_general_suggestions'] = [
+    'variables' => [],
+  ];
+  $items['theme_test_function_suggestions'] = [
+    'variables' => [],
     'function' => 'theme_theme_test_function_suggestions',
-  );
-  $items['theme_test_suggestions_include'] = array(
-    'variables' => array(),
+  ];
+  $items['theme_test_suggestions_include'] = [
+    'variables' => [],
     'function' => 'theme_theme_test_suggestions_include',
-  );
-  $items['theme_test_foo'] = array(
-    'variables' => array('foo' => NULL),
+  ];
+  $items['theme_test_foo'] = [
+    'variables' => ['foo' => NULL],
     'function' => 'theme_theme_test_foo',
-  );
-  $items['theme_test_render_element'] = array(
+  ];
+  $items['theme_test_render_element'] = [
     'render element' => 'elements',
-  );
-  $items['theme_test_render_element_children'] = array(
+  ];
+  $items['theme_test_render_element_children'] = [
     'render element' => 'element',
     'function' => 'theme_theme_test_render_element_children',
-  );
-  $items['theme_test_function_template_override'] = array(
-    'variables' => array(),
+  ];
+  $items['theme_test_function_template_override'] = [
+    'variables' => [],
     'function' => 'theme_theme_test_function_template_override',
-  );
-  $info['test_theme_not_existing_function'] = array(
+  ];
+  $info['test_theme_not_existing_function'] = [
     'function' => 'test_theme_not_existing_function',
-  );
+  ];
   $items['theme_test_preprocess_suggestions'] = [
     'variables' => [
       'foo' => '',
@@ -83,7 +83,7 @@ function theme_test_preprocess_html(&$variables) {
  * Implements hook_page_bottom().
  */
 function theme_test_page_bottom(array &$page_bottom) {
-  $page_bottom['theme_test_page_bottom'] = array('#markup' => 'theme test page bottom markup');
+  $page_bottom['theme_test_page_bottom'] = ['#markup' => 'theme test page bottom markup'];
 }
 
 /**
@@ -167,7 +167,7 @@ function theme_theme_test_function_suggestions($variables) {
  * Implements hook_theme_suggestions_HOOK().
  */
 function theme_test_theme_suggestions_theme_test_suggestion_provided(array $variables) {
-  return array('theme_test_suggestion_provided__' . 'foo');
+  return ['theme_test_suggestion_provided__' . 'foo'];
 }
 
 /**
diff --git a/core/modules/system/tests/modules/twig_extension_test/src/TwigExtension/TestExtension.php b/core/modules/system/tests/modules/twig_extension_test/src/TwigExtension/TestExtension.php
index 78d10202882fa72606819c0b7d7e1730749a8f7e..b364c59dd73c5e91b35b2d4959b7a680374d05cb 100644
--- a/core/modules/system/tests/modules/twig_extension_test/src/TwigExtension/TestExtension.php
+++ b/core/modules/system/tests/modules/twig_extension_test/src/TwigExtension/TestExtension.php
@@ -21,9 +21,9 @@ class TestExtension extends \Twig_Extension {
    *   The value is a standard PHP callback that defines what the function does.
    */
   public function getFunctions() {
-    return array(
-      'testfunc' => new \Twig_Function_Function(array('Drupal\twig_extension_test\TwigExtension\TestExtension', 'testFunction')),
-    );
+    return [
+      'testfunc' => new \Twig_Function_Function(['Drupal\twig_extension_test\TwigExtension\TestExtension', 'testFunction']),
+    ];
   }
 
   /**
@@ -39,9 +39,9 @@ public function getFunctions() {
    *   The value is a standard PHP callback that defines what the filter does.
    */
   public function getFilters() {
-    return array(
-      'testfilter' => new \Twig_Filter_Function(array('Drupal\twig_extension_test\TwigExtension\TestExtension', 'testFilter')),
-    );
+    return [
+      'testfilter' => new \Twig_Filter_Function(['Drupal\twig_extension_test\TwigExtension\TestExtension', 'testFilter']),
+    ];
   }
 
   /**
@@ -93,7 +93,7 @@ public static function testFunction($upperCase = FALSE) {
    * @see \Drupal\system\Tests\Theme\TwigExtensionTest::testTwigExtensionFilter()
    */
   public static function testFilter($string) {
-    return str_replace(array('animal'), array('plant'), $string);
+    return str_replace(['animal'], ['plant'], $string);
   }
 
 }
diff --git a/core/modules/system/tests/modules/twig_extension_test/src/TwigExtensionTestController.php b/core/modules/system/tests/modules/twig_extension_test/src/TwigExtensionTestController.php
index 44e42d950e5c87a264f55b5180796ebe9b59ea12..c15b16d8b0b4a00a64b00b588157322becc2ca27 100644
--- a/core/modules/system/tests/modules/twig_extension_test/src/TwigExtensionTestController.php
+++ b/core/modules/system/tests/modules/twig_extension_test/src/TwigExtensionTestController.php
@@ -14,7 +14,7 @@ class TwigExtensionTestController {
    * Menu callback for testing Twig filters in a Twig template.
    */
   public function testFilterRender() {
-    return array(
+    return [
       '#theme' => 'twig_extension_test_filter',
       '#message' => 'Every animal is not a mineral.',
       '#safe_join_items' => [
@@ -22,14 +22,14 @@ public function testFilterRender() {
         $this->t('<em>will be markup</em>'),
         ['#markup' => '<strong>will be rendered</strong>']
       ]
-    );
+    ];
   }
 
   /**
    * Menu callback for testing Twig functions in a Twig template.
    */
   public function testFunctionRender() {
-    return array('#theme' => 'twig_extension_test_function');
+    return ['#theme' => 'twig_extension_test_function'];
   }
 
 }
diff --git a/core/modules/system/tests/modules/twig_extension_test/twig_extension_test.module b/core/modules/system/tests/modules/twig_extension_test/twig_extension_test.module
index f55e619a7813da02380a2e637303ccdf9541d2f5..eb69e34497d662d1c59a86c4e8083b735c01a941 100644
--- a/core/modules/system/tests/modules/twig_extension_test/twig_extension_test.module
+++ b/core/modules/system/tests/modules/twig_extension_test/twig_extension_test.module
@@ -9,14 +9,14 @@
  * Implements hook_theme().
  */
 function twig_extension_test_theme($existing, $type, $theme, $path) {
-  return array(
-    'twig_extension_test_filter' => array(
-      'variables' => array('message' => NULL, 'safe_join_items' => NULL),
+  return [
+    'twig_extension_test_filter' => [
+      'variables' => ['message' => NULL, 'safe_join_items' => NULL],
       'template' => 'twig_extension_test.filter',
-    ),
-    'twig_extension_test_function' => array(
+    ],
+    'twig_extension_test_function' => [
       'render element' => 'element',
       'template' => 'twig_extension_test.function',
-    ),
-  );
+    ],
+  ];
 }
diff --git a/core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php b/core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php
index 7408ce8f4722a0792552abd0acf416657293e2d8..8e1f69e792282fbfa0d421a66811d12e75422de4 100644
--- a/core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php
+++ b/core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php
@@ -14,16 +14,16 @@ class TwigThemeTestController {
    * Menu callback for testing PHP variables in a Twig template.
    */
   public function phpVariablesRender() {
-    return ['#markup' => \Drupal::theme()->render('twig_theme_test_php_variables', array())];
+    return ['#markup' => \Drupal::theme()->render('twig_theme_test_php_variables', [])];
   }
 
   /**
    * Menu callback for testing translation blocks in a Twig template.
    */
   public function transBlockRender() {
-    return array(
+    return [
       '#theme' => 'twig_theme_test_trans',
-    );
+    ];
   }
 
   /**
@@ -40,9 +40,9 @@ public function placeholderOutsideTransRender() {
    * Renders for testing url_generator functions in a Twig template.
    */
   public function urlGeneratorRender() {
-    return array(
+    return [
       '#theme' => 'twig_theme_test_url_generator',
-    );
+    ];
   }
 
   /**
@@ -73,25 +73,25 @@ public function urlToStringRender() {
    * Renders for testing file_url functions in a Twig template.
    */
   public function fileUrlRender() {
-    return array(
+    return [
       '#theme' => 'twig_theme_test_file_url',
-    );
+    ];
   }
 
   /**
    * Renders for testing attach_library functions in a Twig template.
    */
   public function attachLibraryRender() {
-    return array(
+    return [
       '#theme' => 'twig_theme_test_attach_library',
-    );
+    ];
   }
 
   /**
    * Menu callback for testing the Twig registry loader.
    */
   public function registryLoaderRender() {
-    return array('#theme' => 'twig_registry_loader_test');
+    return ['#theme' => 'twig_registry_loader_test'];
   }
 
   /**
diff --git a/core/modules/system/tests/modules/twig_theme_test/twig_theme_test.module b/core/modules/system/tests/modules/twig_theme_test/twig_theme_test.module
index b3a75e5180cca394764fb14e5a21ad6fdd97d36f..a8b4086203ad844160a9e5fcd064be20e3644b5d 100644
--- a/core/modules/system/tests/modules/twig_theme_test/twig_theme_test.module
+++ b/core/modules/system/tests/modules/twig_theme_test/twig_theme_test.module
@@ -9,70 +9,70 @@
  * Implements hook_theme().
  */
 function twig_theme_test_theme($existing, $type, $theme, $path) {
-  $items['twig_theme_test_filter'] = array(
-    'variables' => array('quote' => array(), 'attributes' => array()),
+  $items['twig_theme_test_filter'] = [
+    'variables' => ['quote' => [], 'attributes' => []],
     'template' => 'twig_theme_test.filter',
-  );
-  $items['twig_theme_test_php_variables'] = array(
+  ];
+  $items['twig_theme_test_php_variables'] = [
     'template' => 'twig_theme_test.php_variables',
-  );
-  $items['twig_theme_test_trans'] = array(
-    'variables' => array(),
+  ];
+  $items['twig_theme_test_trans'] = [
+    'variables' => [],
     'template' => 'twig_theme_test.trans',
-  );
-  $items['twig_theme_test_placeholder_outside_trans'] = array(
-    'variables' => array('var' => ''),
+  ];
+  $items['twig_theme_test_placeholder_outside_trans'] = [
+    'variables' => ['var' => ''],
     'template' => 'twig_theme_test.placeholder_outside_trans',
-  );
-  $items['twig_namespace_test'] = array(
-    'variables' => array(),
+  ];
+  $items['twig_namespace_test'] = [
+    'variables' => [],
     'template' => 'twig_namespace_test',
-  );
-  $items['twig_registry_loader_test'] = array(
-    'variables' => array(),
-  );
-  $items['twig_registry_loader_test_include'] = array(
-    'variables' => array(),
-  );
-  $items['twig_registry_loader_test_extend'] = array(
-    'variables' => array(),
-  );
-  $items['twig_raw_test'] = array(
-    'variables' => array('script' => ''),
-  );
-  $items['twig_autoescape_test'] = array(
-    'variables' => array('script' => ''),
-  );
-  $items['twig_theme_test_url_generator'] = array(
-    'variables' => array(),
+  ];
+  $items['twig_registry_loader_test'] = [
+    'variables' => [],
+  ];
+  $items['twig_registry_loader_test_include'] = [
+    'variables' => [],
+  ];
+  $items['twig_registry_loader_test_extend'] = [
+    'variables' => [],
+  ];
+  $items['twig_raw_test'] = [
+    'variables' => ['script' => ''],
+  ];
+  $items['twig_autoescape_test'] = [
+    'variables' => ['script' => ''],
+  ];
+  $items['twig_theme_test_url_generator'] = [
+    'variables' => [],
     'template' => 'twig_theme_test.url_generator',
-  );
-  $items['twig_theme_test_link_generator'] = array(
+  ];
+  $items['twig_theme_test_link_generator'] = [
     'variables' => [
       'test_url' => NULL,
       'test_url_attribute' => NULL,
       'attributes' => [],
     ],
     'template' => 'twig_theme_test.link_generator',
-  );
-  $items['twig_theme_test_url_to_string'] = array(
-    'variables' => array('test_url' => NULL),
+  ];
+  $items['twig_theme_test_url_to_string'] = [
+    'variables' => ['test_url' => NULL],
     'template' => 'twig_theme_test.url_to_string',
-  );
-  $items['twig_theme_test_file_url'] = array(
-    'variables' => array(),
+  ];
+  $items['twig_theme_test_file_url'] = [
+    'variables' => [],
     'template' => 'twig_theme_test.file_url',
-  );
-  $items['twig_theme_test_attach_library'] = array(
-    'variables' => array(),
+  ];
+  $items['twig_theme_test_attach_library'] = [
+    'variables' => [],
     'template' => 'twig_theme_test.attach_library',
-  );
-  $items['twig_theme_test_renderable'] = array(
-    'variables' => array(
+  ];
+  $items['twig_theme_test_renderable'] = [
+    'variables' => [
       'renderable' => NULL,
-    ),
+    ],
     'template' => 'twig_theme_test.renderable',
-  );
+  ];
   return $items;
 }
 
@@ -83,36 +83,36 @@ function _test_theme_twig_php_values() {
   // Prefix each variable with "twig_" so that Twig doesn't get confused
   // between a variable and a primitive. Arrays are not tested since they should
   // be a Drupal render array.
-  return array(
-    'twig_null' => array(
+  return [
+    'twig_null' => [
       'value' => NULL,
       'expected' => '',
-    ),
-    'twig_bool_false' => array(
+    ],
+    'twig_bool_false' => [
       'value' => FALSE,
       'expected' => '',
-    ),
-    'twig_bool_true' => array(
+    ],
+    'twig_bool_true' => [
       'value' => TRUE,
       'expected' => '1',
-    ),
-    'twig_int' => array(
+    ],
+    'twig_int' => [
       'value' => 1,
       'expected' => '1',
-    ),
-    'twig_int_0' => array(
+    ],
+    'twig_int_0' => [
       'value' => 0,
       'expected' => '0',
-    ),
-    'twig_float' => array(
+    ],
+    'twig_float' => [
       'value' => 122.34343,
       'expected' => '122.34343',
-    ),
-    'twig_string' => array(
+    ],
+    'twig_string' => [
       'value' => 'Hello world!',
       'expected' => 'Hello world!',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/system/tests/modules/update_script_test/src/Controller/UpdateScriptTestController.php b/core/modules/system/tests/modules/update_script_test/src/Controller/UpdateScriptTestController.php
index b72ab1b91c7dd797e9e02d6690c67aa32160e74a..e1c21c29c34708276dff873bc2e3a04218054490 100644
--- a/core/modules/system/tests/modules/update_script_test/src/Controller/UpdateScriptTestController.php
+++ b/core/modules/system/tests/modules/update_script_test/src/Controller/UpdateScriptTestController.php
@@ -18,12 +18,12 @@ public function databaseUpdatesMenuItem(Request $request) {
     // @todo Simplify with https://www.drupal.org/node/2548095
     $base_url = str_replace('/update.php', '', $request->getBaseUrl());
     $url = (new Url('system.db_update'))->setOption('base_url', $base_url);
-    $build['main'] = array(
+    $build['main'] = [
       '#type' => 'link',
       '#title' => $this->t('Run database updates'),
       '#url' => $url,
       '#access' => $url->access($this->currentUser()),
-    );
+    ];
 
     return $build;
   }
diff --git a/core/modules/system/tests/modules/update_script_test/update_script_test.install b/core/modules/system/tests/modules/update_script_test/update_script_test.install
index 0f1718d7d6099936ddf1e5bd14cfa166d315f1cb..ce3874320dca139d4e3fa56e5c5759b0d874fc38 100644
--- a/core/modules/system/tests/modules/update_script_test/update_script_test.install
+++ b/core/modules/system/tests/modules/update_script_test/update_script_test.install
@@ -9,27 +9,27 @@
  * Implements hook_requirements().
  */
 function update_script_test_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
 
   if ($phase == 'update') {
     // Set a requirements warning or error when the test requests it.
     $requirement_type = \Drupal::config('update_script_test.settings')->get('requirement_type');
     switch ($requirement_type) {
       case REQUIREMENT_WARNING:
-        $requirements['update_script_test'] = array(
+        $requirements['update_script_test'] = [
           'title' => 'Update script test',
           'value' => 'Warning',
           'description' => 'This is a requirements warning provided by the update_script_test module.',
           'severity' => REQUIREMENT_WARNING,
-        );
+        ];
         break;
       case REQUIREMENT_ERROR:
-        $requirements['update_script_test'] = array(
+        $requirements['update_script_test'] = [
           'title' => 'Update script test',
           'value' => 'Error',
           'description' => 'This is a requirements error provided by the update_script_test module.',
           'severity' => REQUIREMENT_ERROR,
-        );
+        ];
         break;
     }
   }
diff --git a/core/modules/system/tests/modules/update_test_1/update_test_1.install b/core/modules/system/tests/modules/update_test_1/update_test_1.install
index 7ef5d98adc98b12542871aee84751f63737add25..1d632c713c5bcd117c83576ac48e32c21eb87e9e 100644
--- a/core/modules/system/tests/modules/update_test_1/update_test_1.install
+++ b/core/modules/system/tests/modules/update_test_1/update_test_1.install
@@ -18,21 +18,21 @@ function update_test_1_update_dependencies() {
   // the correct array structure. Therefore, we use updates from the
   // update_test_0 module (which will be installed first) that they will not
   // get in the way of other tests.
-  $dependencies['update_test_0'][8001] = array(
+  $dependencies['update_test_0'][8001] = [
     // Compare to update_test_2_update_dependencies(), where the same
     // update_test_0 module update function is forced to depend on an update
     // function from a different module. This allows us to test that both
     // dependencies are correctly recorded.
     'update_test_1' => 8001,
-  );
-  $dependencies['update_test_0'][8002] = array(
+  ];
+  $dependencies['update_test_0'][8002] = [
     // Compare to update_test_2_update_dependencies(), where the same
     // update_test_0 module update function is forced to depend on a
     // different update function within the same module. This allows us to
     // test that only the dependency on the higher-numbered update function
     // is recorded.
     'update_test_1' => 8003,
-  );
+  ];
   return $dependencies;
 }
 
diff --git a/core/modules/system/tests/modules/update_test_2/update_test_2.install b/core/modules/system/tests/modules/update_test_2/update_test_2.install
index 42027204fda526547bda0871eb1a15ab9973f31e..8818545c6a43ad9c4e7c5ece98e4060ad5faca14 100644
--- a/core/modules/system/tests/modules/update_test_2/update_test_2.install
+++ b/core/modules/system/tests/modules/update_test_2/update_test_2.install
@@ -18,18 +18,18 @@ function update_test_2_update_dependencies() {
   // 2. update_test_3_update_8001()
   // 3. update_test_2_update_8002()
   // 4. update_test_2_update_8003()
-  $dependencies['update_test_2'][8002] = array(
+  $dependencies['update_test_2'][8002] = [
     'update_test_3' => 8001,
-  );
+  ];
 
   // These are coordinated with the corresponding dependencies declared in
   // update_test_1_update_dependencies().
-  $dependencies['update_test_0'][8001] = array(
+  $dependencies['update_test_0'][8001] = [
     'update_test_2' => 8002,
-  );
-  $dependencies['update_test_0'][8002] = array(
+  ];
+  $dependencies['update_test_0'][8002] = [
     'update_test_1' => 8002,
-  );
+  ];
 
   return $dependencies;
 }
diff --git a/core/modules/system/tests/modules/update_test_3/update_test_3.install b/core/modules/system/tests/modules/update_test_3/update_test_3.install
index ae2da4b09a2efa64ccce49820971bd2b26aea866..6a837b69c8bce481502a3dc3c2dbba6655dd53e7 100644
--- a/core/modules/system/tests/modules/update_test_3/update_test_3.install
+++ b/core/modules/system/tests/modules/update_test_3/update_test_3.install
@@ -11,9 +11,9 @@
  * @see update_test_2_update_dependencies()
  */
 function update_test_3_update_dependencies() {
-  $dependencies['update_test_3'][8001] = array(
+  $dependencies['update_test_3'][8001] = [
     'update_test_2' => 8001,
-  );
+  ];
   return $dependencies;
 }
 
diff --git a/core/modules/system/tests/modules/url_alter_test/src/PathProcessor.php b/core/modules/system/tests/modules/url_alter_test/src/PathProcessor.php
index b59fe4ccf30b5d4506fdb26a9252d3451a465c74..3709907dcde596cc092560ddb3238762e507f16d 100644
--- a/core/modules/system/tests/modules/url_alter_test/src/PathProcessor.php
+++ b/core/modules/system/tests/modules/url_alter_test/src/PathProcessor.php
@@ -16,7 +16,7 @@ class PathProcessor implements InboundPathProcessorInterface {
   public function processInbound($path, Request $request) {
     if (preg_match('!^/user/([^/]+)(/.*)?!', $path, $matches)) {
       if ($account = user_load_by_name($matches[1])) {
-        $matches += array(2 => '');
+        $matches += [2 => ''];
         $path = '/user/' . $account->id() . $matches[2];
       }
     }
diff --git a/core/modules/system/tests/modules/url_alter_test/src/PathProcessorTest.php b/core/modules/system/tests/modules/url_alter_test/src/PathProcessorTest.php
index b3ba568850920d269a0696c8f0c4517e23747667..9a89df9b821a5f6627c864e3dc43745650026716 100644
--- a/core/modules/system/tests/modules/url_alter_test/src/PathProcessorTest.php
+++ b/core/modules/system/tests/modules/url_alter_test/src/PathProcessorTest.php
@@ -20,7 +20,7 @@ public function processInbound($path, Request $request) {
     // Rewrite user/username to user/uid.
     if (preg_match('!^/user/([^/]+)(/.*)?!', $path, $matches)) {
       if ($account = user_load_by_name($matches[1])) {
-        $matches += array(2 => '');
+        $matches += [2 => ''];
         $path = '/user/' . $account->id() . $matches[2];
       }
     }
@@ -37,11 +37,11 @@ public function processInbound($path, Request $request) {
   /**
    * {@inheritdoc}
    */
-  public function processOutbound($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
     // Rewrite user/uid to user/username.
     if (preg_match('!^/user/([0-9]+)(/.*)?!', $path, $matches)) {
       if ($account = User::load($matches[1])) {
-        $matches += array(2 => '');
+        $matches += [2 => ''];
         $path = '/user/' . $account->getUsername() . $matches[2];
         if ($bubbleable_metadata) {
           $bubbleable_metadata->addCacheTags($account->getCacheTags());
diff --git a/core/modules/system/tests/src/Functional/Bootstrap/DrupalSetMessageTest.php b/core/modules/system/tests/src/Functional/Bootstrap/DrupalSetMessageTest.php
index 1b0f31a7488f18e1a5bb8e72ccd022485f5b256f..0931d65de12776bd742d16ef6953bac591270755 100644
--- a/core/modules/system/tests/src/Functional/Bootstrap/DrupalSetMessageTest.php
+++ b/core/modules/system/tests/src/Functional/Bootstrap/DrupalSetMessageTest.php
@@ -16,7 +16,7 @@ class DrupalSetMessageTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('system_test');
+  public static $modules = ['system_test'];
 
   /**
    * Tests drupal_set_message().
diff --git a/core/modules/system/tests/src/Functional/Cache/ClearTest.php b/core/modules/system/tests/src/Functional/Cache/ClearTest.php
index 4b3398741596be5df8e4cabe7cb833ee01d3fac8..fd9641c59b947d5c7eff252568ef23fb6d64a4f5 100644
--- a/core/modules/system/tests/src/Functional/Cache/ClearTest.php
+++ b/core/modules/system/tests/src/Functional/Cache/ClearTest.php
@@ -35,7 +35,7 @@ function testFlushAllCaches() {
 
     foreach ($bins as $bin => $cache_backend) {
       $cid = 'test_cid_clear' . $bin;
-      $this->assertFalse($this->checkCacheExists($cid, $this->defaultValue, $bin), format_string('All cache entries removed from @bin.', array('@bin' => $bin)));
+      $this->assertFalse($this->checkCacheExists($cid, $this->defaultValue, $bin), format_string('All cache entries removed from @bin.', ['@bin' => $bin]));
     }
   }
 
diff --git a/core/modules/system/tests/src/Functional/Cache/PageCacheTagsTestBase.php b/core/modules/system/tests/src/Functional/Cache/PageCacheTagsTestBase.php
index de2b4194d9a237c85ee890f03ef15bd39c29b34f..39a514fa3b2ac2a6a055a9ad533cdc31bec96eb5 100644
--- a/core/modules/system/tests/src/Functional/Cache/PageCacheTagsTestBase.php
+++ b/core/modules/system/tests/src/Functional/Cache/PageCacheTagsTestBase.php
@@ -44,12 +44,12 @@ protected function setUp() {
    */
   protected function verifyPageCache(Url $url, $hit_or_miss, $tags = FALSE) {
     $this->drupalGet($url);
-    $message = SafeMarkup::format('Page cache @hit_or_miss for %path.', array('@hit_or_miss' => $hit_or_miss, '%path' => $url->toString()));
+    $message = SafeMarkup::format('Page cache @hit_or_miss for %path.', ['@hit_or_miss' => $hit_or_miss, '%path' => $url->toString()]);
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), $hit_or_miss, $message);
 
     if ($hit_or_miss === 'HIT' && is_array($tags)) {
       $absolute_url = $url->setAbsolute()->toString();
-      $cid_parts = array($absolute_url, 'html');
+      $cid_parts = [$absolute_url, 'html'];
       $cid = implode(':', $cid_parts);
       $cache_entry = \Drupal::cache('render')->get($cid);
       sort($cache_entry->tags);
diff --git a/core/modules/system/tests/src/Functional/Datetime/DrupalDateTimeTest.php b/core/modules/system/tests/src/Functional/Datetime/DrupalDateTimeTest.php
index 8ac27b0fc0ffa8492503236b0d730a3beffd0f5f..cc23f4895b79d70e0323cf3c7124624379711f30 100644
--- a/core/modules/system/tests/src/Functional/Datetime/DrupalDateTimeTest.php
+++ b/core/modules/system/tests/src/Functional/Datetime/DrupalDateTimeTest.php
@@ -16,7 +16,7 @@ class DrupalDateTimeTest extends BrowserTestBase {
   /**
    * Set up required modules.
    */
-  public static $modules = array();
+  public static $modules = [];
 
   /**
    * Test setup.
@@ -30,11 +30,11 @@ protected function setUp() {
    * Test that the AJAX Timezone Callback can deal with various formats.
    */
   public function testSystemTimezone() {
-    $options = array(
-      'query' => array(
+    $options = [
+      'query' => [
         'date' => 'Tue+Sep+17+2013+21%3A35%3A31+GMT%2B0100+(BST)#',
-      )
-    );
+      ]
+    ];
     // Query the AJAX Timezone Callback with a long-format date.
     $response = $this->drupalGet('system/timezone/BST/3600/1', $options);
     $this->assertEqual($response, '"Europe\/London"', 'Timezone AJAX callback successfully identifies and responds to a long-format date.');
@@ -80,11 +80,11 @@ public function testDateTimezone() {
 
     // Create user.
     $this->config('system.date')->set('timezone.user.configurable', 1)->save();
-    $test_user = $this->drupalCreateUser(array());
+    $test_user = $this->drupalCreateUser([]);
     $this->drupalLogin($test_user);
 
     // Set up the user with a different timezone than the site.
-    $edit = array('mail' => $test_user->getEmail(), 'timezone' => 'Asia/Manila');
+    $edit = ['mail' => $test_user->getEmail(), 'timezone' => 'Asia/Manila'];
     $this->drupalPostForm('user/' . $test_user->id() . '/edit', $edit, t('Save'));
 
     // Reload the user and reset the timezone in AccountProxy::setAccount().
@@ -109,7 +109,7 @@ function testTimezoneFormat() {
     $this->assertEqual($date->format('Y/m/d H:i:s e'), '1972/10/11 12:25:21 UTC', 'Date has default UTC time zone and correct date/time.');
 
     // Verify that the format method can override the time zone.
-    $this->assertEqual($date->format('Y/m/d H:i:s e', array('timezone' => 'America/New_York')), '1972/10/11 08:25:21 America/New_York', 'Date displayed overidden time zone and correct date/time');
+    $this->assertEqual($date->format('Y/m/d H:i:s e', ['timezone' => 'America/New_York']), '1972/10/11 08:25:21 America/New_York', 'Date displayed overidden time zone and correct date/time');
 
     // Verify that the date format method still displays the default time zone
     // for the date object.
diff --git a/core/modules/system/tests/src/Functional/DrupalKernel/ContentNegotiationTest.php b/core/modules/system/tests/src/Functional/DrupalKernel/ContentNegotiationTest.php
index 49817ccf6b6addcd04224724e7c955ee154ce73e..82e2e9249e0c5d208a23de4f2cb51c3c6c5e8428 100644
--- a/core/modules/system/tests/src/Functional/DrupalKernel/ContentNegotiationTest.php
+++ b/core/modules/system/tests/src/Functional/DrupalKernel/ContentNegotiationTest.php
@@ -20,7 +20,7 @@ class ContentNegotiationTest extends BrowserTestBase {
    * @see https://www.drupal.org/node/1716790
    */
   function testBogusAcceptHeader() {
-    $tests = array(
+    $tests = [
       // See https://bugs.webkit.org/show_bug.cgi?id=27267.
       'Firefox 3.5 (2009)' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
       'IE8 (2009)' => 'image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-silverlight, */*',
@@ -34,9 +34,9 @@ function testBogusAcceptHeader() {
       'Safari (2010), iOS 4.2.1 (2012)' => 'application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5',
       'Android #1 (2012)' => 'application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5',
       'Android #2 (2012)' => 'text/xml,text/html,application/xhtml+xml,image/png,text/plain,*/*;q=0.8',
-    );
+    ];
     foreach ($tests as $case => $header) {
-      $this->drupalGet('', array(), array('Accept: ' . $header));
+      $this->drupalGet('', [], ['Accept: ' . $header]);
       $this->assertNoText('Unsupported Media Type', '"Unsupported Media Type" not found for ' . $case);
       $this->assertText(t('Log in'), '"Log in" found for ' . $case);
     }
diff --git a/core/modules/system/tests/src/Functional/Entity/ConfigEntityImportTest.php b/core/modules/system/tests/src/Functional/Entity/ConfigEntityImportTest.php
index c9243eae2d8631e8d98d356c6f88050c847dd113..6c5a9d64c59e4acac6292b2a409a6160f169e263 100644
--- a/core/modules/system/tests/src/Functional/Entity/ConfigEntityImportTest.php
+++ b/core/modules/system/tests/src/Functional/Entity/ConfigEntityImportTest.php
@@ -21,7 +21,7 @@ class ConfigEntityImportTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('action', 'block', 'filter', 'image', 'search', 'search_extra_type');
+  public static $modules = ['action', 'block', 'filter', 'image', 'search', 'search_extra_type'];
 
   /**
    * {@inheritdoc}
@@ -48,10 +48,10 @@ public function testConfigUpdateImport() {
   protected function doActionUpdate() {
     // Create a test action with a known label.
     $name = 'system.action.apple';
-    $entity = Action::create(array(
+    $entity = Action::create([
       'id' => 'apple',
       'plugin' => 'action_message_action',
-    ));
+    ]);
     $entity->save();
 
     $this->checkSinglePluginConfigSync($entity, 'configuration', 'message', '');
@@ -69,10 +69,10 @@ protected function doActionUpdate() {
   protected function doBlockUpdate() {
     // Create a test block with a known label.
     $name = 'block.block.apple';
-    $block = $this->drupalPlaceBlock('system_powered_by_block', array(
+    $block = $this->drupalPlaceBlock('system_powered_by_block', [
       'id' => 'apple',
       'label' => 'Red Delicious',
-    ));
+    ]);
 
     $this->checkSinglePluginConfigSync($block, 'settings', 'label', 'Red Delicious');
 
diff --git a/core/modules/system/tests/src/Functional/Entity/EntityCacheTagsTestBase.php b/core/modules/system/tests/src/Functional/Entity/EntityCacheTagsTestBase.php
index 541a412733d34ddfaa75e0614699dd541ff9b0d1..1476dfafec675a8e528067ef39463f98845536fd 100644
--- a/core/modules/system/tests/src/Functional/Entity/EntityCacheTagsTestBase.php
+++ b/core/modules/system/tests/src/Functional/Entity/EntityCacheTagsTestBase.php
@@ -68,18 +68,18 @@ protected function setUp() {
     if ($this->entity->getEntityType()->get('field_ui_base_route')) {
       // Add field, so we can modify the field storage and field entities to
       // verify that changes to those indeed clear cache tags.
-      FieldStorageConfig::create(array(
+      FieldStorageConfig::create([
         'field_name' => 'configurable_field',
         'entity_type' => $this->entity->getEntityTypeId(),
         'type' => 'test_field',
-        'settings' => array(),
-      ))->save();
+        'settings' => [],
+      ])->save();
       FieldConfig::create([
         'entity_type' => $this->entity->getEntityTypeId(),
         'bundle' => $this->entity->bundle(),
         'field_name' => 'configurable_field',
         'label' => 'Configurable field',
-        'settings' => array(),
+        'settings' => [],
       ])->save();
 
       // Reload the entity now that a new field has been added to it.
@@ -110,11 +110,11 @@ protected function setUp() {
    * @see \Drupal\simpletest\TestBase::getInfo()
    */
   protected static function generateStandardizedInfo($entity_type_label, $group) {
-    return array(
+    return [
       'name' => "$entity_type_label entity cache tags",
       'description' => "Test the $entity_type_label entity's cache tags.",
       'group' => $group,
-    );
+    ];
   }
 
   /**
@@ -170,7 +170,7 @@ protected function getAdditionalCacheContextsForEntity(EntityInterface $entity)
    * @see \Drupal\system\Tests\Entity\EntityCacheTagsTestBase::createEntity()
    */
   protected function getAdditionalCacheTagsForEntity(EntityInterface $entity) {
-    return array();
+    return [];
   }
 
   /**
@@ -205,7 +205,7 @@ protected function getAdditionalCacheTagsForEntityListing() {
   protected function selectViewMode($entity_type) {
     $view_modes = \Drupal::entityManager()
       ->getStorage('entity_view_mode')
-      ->loadByProperties(array('targetEntityType' => $entity_type));
+      ->loadByProperties(['targetEntityType' => $entity_type]);
 
     if (empty($view_modes)) {
       return 'default';
@@ -241,46 +241,46 @@ protected function createReferenceTestEntities($referenced_entity) {
 
     // Add a field of the given type to the given entity type's "foo" bundle.
     $field_name = $referenced_entity->getEntityTypeId() . '_reference';
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => $entity_type,
       'type' => 'entity_reference',
       'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-      'settings' => array(
+      'settings' => [
         'target_type' => $referenced_entity->getEntityTypeId(),
-      ),
-    ))->save();
+      ],
+    ])->save();
     FieldConfig::create([
       'field_name' => $field_name,
       'entity_type' => $entity_type,
       'bundle' => $bundle,
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
-        'handler_settings' => array(
-          'target_bundles' => array(
+        'handler_settings' => [
+          'target_bundles' => [
             $referenced_entity->bundle() => $referenced_entity->bundle(),
-          ),
-          'sort' => array('field' => '_none'),
+          ],
+          'sort' => ['field' => '_none'],
           'auto_create' => FALSE,
-        ),
-      ),
+        ],
+      ],
     ])->save();
     if (!$this->entity->getEntityType()->hasHandlerClass('view_builder')) {
       entity_get_display($entity_type, $bundle, 'full')
-        ->setComponent($field_name, array(
+        ->setComponent($field_name, [
           'type' => 'entity_reference_label',
-        ))
+        ])
         ->save();
     }
     else {
       $referenced_entity_view_mode = $this->selectViewMode($this->entity->getEntityTypeId());
       entity_get_display($entity_type, $bundle, 'full')
-        ->setComponent($field_name, array(
+        ->setComponent($field_name, [
           'type' => 'entity_reference_entity_view',
-          'settings' => array(
+          'settings' => [
             'view_mode' => $referenced_entity_view_mode,
-          ),
-        ))
+          ],
+        ])
         ->save();
     }
 
@@ -288,28 +288,28 @@ protected function createReferenceTestEntities($referenced_entity) {
     $label_key = \Drupal::entityManager()->getDefinition($entity_type)->getKey('label');
     $referencing_entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         $label_key => 'Referencing ' . $entity_type,
         'status' => 1,
         'type' => $bundle,
-        $field_name => array('target_id' => $referenced_entity->id()),
-      ));
+        $field_name => ['target_id' => $referenced_entity->id()],
+      ]);
     $referencing_entity->save();
 
     // Create an entity that does not reference the entity being tested.
     $non_referencing_entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         $label_key => 'Non-referencing ' . $entity_type,
         'status' => 1,
         'type' => $bundle,
-      ));
+      ]);
     $non_referencing_entity->save();
 
-    return array(
+    return [
       $referencing_entity,
       $non_referencing_entity,
-    );
+    ];
   }
 
   /**
@@ -350,7 +350,7 @@ public function testReferencedEntity() {
 
     $page_cache_tags_referencing_entity = in_array('user.permissions', $this->getAccessCacheContextsForEntity($this->referencingEntity)) ? ['config:user.role.anonymous'] : [];
 
-    $view_cache_tag = array();
+    $view_cache_tag = [];
     if ($this->entity->getEntityType()->hasHandlerClass('view_builder')) {
       $view_cache_tag = \Drupal::entityManager()->getViewBuilder($entity_type)
         ->getCacheTags();
diff --git a/core/modules/system/tests/src/Functional/Entity/EntityListBuilderTest.php b/core/modules/system/tests/src/Functional/Entity/EntityListBuilderTest.php
index 6d70760e2dd4c10ce5d047d747836880a3a1833d..94225f4e97dd52d2f07aecf5821b6c4cee0e6820 100644
--- a/core/modules/system/tests/src/Functional/Entity/EntityListBuilderTest.php
+++ b/core/modules/system/tests/src/Functional/Entity/EntityListBuilderTest.php
@@ -16,7 +16,7 @@ class EntityListBuilderTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('entity_test');
+  public static $modules = ['entity_test'];
 
   /**
    * {@inheritdoc}
@@ -25,9 +25,9 @@ protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'administer entity_test content',
-    ));
+    ]);
     $this->drupalLogin($this->webUser);
   }
 
@@ -37,7 +37,7 @@ protected function setUp() {
   public function testPager() {
     // Create 51 test entities.
     for ($i = 1; $i < 52; $i++) {
-      EntityTest::create(array('name' => 'Test entity ' . $i))->save();
+      EntityTest::create(['name' => 'Test entity ' . $i])->save();
     }
 
     // Load the listing page.
diff --git a/core/modules/system/tests/src/Functional/Entity/EntityOperationsTest.php b/core/modules/system/tests/src/Functional/Entity/EntityOperationsTest.php
index 3919ad1d4a1d9bff4b2462cf36d128d76ff7a807..b020f42870cd01e745bf719e0c03e748fc286ae0 100644
--- a/core/modules/system/tests/src/Functional/Entity/EntityOperationsTest.php
+++ b/core/modules/system/tests/src/Functional/Entity/EntityOperationsTest.php
@@ -16,13 +16,13 @@ class EntityOperationsTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test');
+  public static $modules = ['entity_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $this->drupalLogin($this->drupalCreateUser(array('administer permissions')));
+    $this->drupalLogin($this->drupalCreateUser(['administer permissions']));
   }
 
   /**
@@ -36,7 +36,7 @@ public function testEntityOperationAlter() {
     $roles = user_roles();
     foreach ($roles as $role) {
       $this->assertLinkByHref($role->url() . '/test_operation');
-      $this->assertLink(format_string('Test Operation: @label', array('@label' => $role->label())));
+      $this->assertLink(format_string('Test Operation: @label', ['@label' => $role->label()]));
     }
   }
 
diff --git a/core/modules/system/tests/src/Functional/Entity/EntityReferenceSelection/EntityReferenceSelectionAccessTest.php b/core/modules/system/tests/src/Functional/Entity/EntityReferenceSelection/EntityReferenceSelectionAccessTest.php
index b01d267469f68ecc87c627acdcdc2254379f7e20..df33102811fc690309b0bfb88a184651d0214218 100644
--- a/core/modules/system/tests/src/Functional/Entity/EntityReferenceSelection/EntityReferenceSelectionAccessTest.php
+++ b/core/modules/system/tests/src/Functional/Entity/EntityReferenceSelection/EntityReferenceSelectionAccessTest.php
@@ -26,13 +26,13 @@ class EntityReferenceSelectionAccessTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'comment');
+  public static $modules = ['node', 'comment'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create an Article node type.
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
   }
 
   /**
@@ -50,10 +50,10 @@ protected function assertReferenceable(array $selection_options, $tests, $handle
 
     foreach ($tests as $test) {
       foreach ($test['arguments'] as $arguments) {
-        $result = call_user_func_array(array($handler, 'getReferenceableEntities'), $arguments);
-        $this->assertEqual($result, $test['result'], format_string('Valid result set returned by @handler.', array('@handler' => $handler_name)));
+        $result = call_user_func_array([$handler, 'getReferenceableEntities'], $arguments);
+        $this->assertEqual($result, $test['result'], format_string('Valid result set returned by @handler.', ['@handler' => $handler_name]));
 
-        $result = call_user_func_array(array($handler, 'countReferenceableEntities'), $arguments);
+        $result = call_user_func_array([$handler, 'countReferenceableEntities'], $arguments);
         if (!empty($test['result'])) {
           $bundle = key($test['result']);
           $count = count($test['result'][$bundle]);
@@ -62,7 +62,7 @@ protected function assertReferenceable(array $selection_options, $tests, $handle
           $count = 0;
         }
 
-        $this->assertEqual($result, $count, format_string('Valid count returned by @handler.', array('@handler' => $handler_name)));
+        $this->assertEqual($result, $count, format_string('Valid count returned by @handler.', ['@handler' => $handler_name]));
       }
     }
   }
@@ -71,39 +71,39 @@ protected function assertReferenceable(array $selection_options, $tests, $handle
    * Test the node-specific overrides of the entity handler.
    */
   public function testNodeHandler() {
-    $selection_options = array(
+    $selection_options = [
       'target_type' => 'node',
       'handler' => 'default',
-      'handler_settings' => array(
+      'handler_settings' => [
         'target_bundles' => NULL,
-      ),
-    );
+      ],
+    ];
 
     // Build a set of test data.
     // Titles contain HTML-special characters to test escaping.
-    $node_values = array(
-      'published1' => array(
+    $node_values = [
+      'published1' => [
         'type' => 'article',
         'status' => NodeInterface::PUBLISHED,
         'title' => 'Node published1 (<&>)',
         'uid' => 1,
-      ),
-      'published2' => array(
+      ],
+      'published2' => [
         'type' => 'article',
         'status' => NodeInterface::PUBLISHED,
         'title' => 'Node published2 (<&>)',
         'uid' => 1,
-      ),
-      'unpublished' => array(
+      ],
+      'unpublished' => [
         'type' => 'article',
         'status' => NodeInterface::NOT_PUBLISHED,
         'title' => 'Node unpublished (<&>)',
         'uid' => 1,
-      ),
-    );
+      ],
+    ];
 
-    $nodes = array();
-    $node_labels = array();
+    $nodes = [];
+    $node_labels = [];
     foreach ($node_values as $key => $values) {
       $node = Node::create($values);
       $node->save();
@@ -112,84 +112,84 @@ public function testNodeHandler() {
     }
 
     // Test as a non-admin.
-    $normal_user = $this->drupalCreateUser(array('access content'));
+    $normal_user = $this->drupalCreateUser(['access content']);
     \Drupal::currentUser()->setAccount($normal_user);
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array(NULL, 'CONTAINS'),
-        ),
-        'result' => array(
-          'article' => array(
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          [NULL, 'CONTAINS'],
+        ],
+        'result' => [
+          'article' => [
             $nodes['published1']->id() => $node_labels['published1'],
             $nodes['published2']->id() => $node_labels['published2'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('published1', 'CONTAINS'),
-          array('Published1', 'CONTAINS'),
-        ),
-        'result' => array(
-          'article' => array(
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['published1', 'CONTAINS'],
+          ['Published1', 'CONTAINS'],
+        ],
+        'result' => [
+          'article' => [
             $nodes['published1']->id() => $node_labels['published1'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('published2', 'CONTAINS'),
-          array('Published2', 'CONTAINS'),
-        ),
-        'result' => array(
-          'article' => array(
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['published2', 'CONTAINS'],
+          ['Published2', 'CONTAINS'],
+        ],
+        'result' => [
+          'article' => [
             $nodes['published2']->id() => $node_labels['published2'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('invalid node', 'CONTAINS'),
-        ),
-        'result' => array(),
-      ),
-      array(
-        'arguments' => array(
-          array('Node unpublished', 'CONTAINS'),
-        ),
-        'result' => array(),
-      ),
-    );
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['invalid node', 'CONTAINS'],
+        ],
+        'result' => [],
+      ],
+      [
+        'arguments' => [
+          ['Node unpublished', 'CONTAINS'],
+        ],
+        'result' => [],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'Node handler');
 
     // Test as an admin.
-    $admin_user = $this->drupalCreateUser(array('access content', 'bypass node access'));
+    $admin_user = $this->drupalCreateUser(['access content', 'bypass node access']);
     \Drupal::currentUser()->setAccount($admin_user);
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array(NULL, 'CONTAINS'),
-        ),
-        'result' => array(
-          'article' => array(
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          [NULL, 'CONTAINS'],
+        ],
+        'result' => [
+          'article' => [
             $nodes['published1']->id() => $node_labels['published1'],
             $nodes['published2']->id() => $node_labels['published2'],
             $nodes['unpublished']->id() => $node_labels['unpublished'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('Node unpublished', 'CONTAINS'),
-        ),
-        'result' => array(
-          'article' => array(
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['Node unpublished', 'CONTAINS'],
+        ],
+        'result' => [
+          'article' => [
             $nodes['unpublished']->id() => $node_labels['unpublished'],
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'Node handler (admin)');
   }
 
@@ -197,39 +197,39 @@ public function testNodeHandler() {
    * Test the user-specific overrides of the entity handler.
    */
   public function testUserHandler() {
-    $selection_options = array(
+    $selection_options = [
       'target_type' => 'user',
       'handler' => 'default',
-      'handler_settings' => array(
+      'handler_settings' => [
         'target_bundles' => NULL,
         'include_anonymous' => TRUE,
-      ),
-    );
+      ],
+    ];
 
     // Build a set of test data.
-    $user_values = array(
+    $user_values = [
       'anonymous' => User::load(0),
       'admin' => User::load(1),
-      'non_admin' => array(
+      'non_admin' => [
         'name' => 'non_admin <&>',
         'mail' => 'non_admin@example.com',
-        'roles' => array(),
+        'roles' => [],
         'pass' => user_password(),
         'status' => 1,
-      ),
-      'blocked' => array(
+      ],
+      'blocked' => [
         'name' => 'blocked <&>',
         'mail' => 'blocked@example.com',
-        'roles' => array(),
+        'roles' => [],
         'pass' => user_password(),
         'status' => 0,
-      ),
-    );
+      ],
+    ];
 
     $user_values['anonymous']->name = $this->config('user.settings')->get('anonymous');
-    $users = array();
+    $users = [];
 
-    $user_labels = array();
+    $user_labels = [];
     foreach ($user_values as $key => $values) {
       if (is_array($values)) {
         $account = User::create($values);
@@ -244,113 +244,113 @@ public function testUserHandler() {
 
     // Test as a non-admin.
     \Drupal::currentUser()->setAccount($users['non_admin']);
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array(NULL, 'CONTAINS'),
-        ),
-        'result' => array(
-          'user' => array(
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          [NULL, 'CONTAINS'],
+        ],
+        'result' => [
+          'user' => [
             $users['admin']->id() => $user_labels['admin'],
             $users['non_admin']->id() => $user_labels['non_admin'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('non_admin', 'CONTAINS'),
-          array('NON_ADMIN', 'CONTAINS'),
-        ),
-        'result' => array(
-          'user' => array(
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['non_admin', 'CONTAINS'],
+          ['NON_ADMIN', 'CONTAINS'],
+        ],
+        'result' => [
+          'user' => [
             $users['non_admin']->id() => $user_labels['non_admin'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('invalid user', 'CONTAINS'),
-        ),
-        'result' => array(),
-      ),
-      array(
-        'arguments' => array(
-          array('blocked', 'CONTAINS'),
-        ),
-        'result' => array(),
-      ),
-    );
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['invalid user', 'CONTAINS'],
+        ],
+        'result' => [],
+      ],
+      [
+        'arguments' => [
+          ['blocked', 'CONTAINS'],
+        ],
+        'result' => [],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'User handler');
 
     \Drupal::currentUser()->setAccount($users['admin']);
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array(NULL, 'CONTAINS'),
-        ),
-        'result' => array(
-          'user' => array(
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          [NULL, 'CONTAINS'],
+        ],
+        'result' => [
+          'user' => [
             $users['anonymous']->id() => $user_labels['anonymous'],
             $users['admin']->id() => $user_labels['admin'],
             $users['non_admin']->id() => $user_labels['non_admin'],
             $users['blocked']->id() => $user_labels['blocked'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('blocked', 'CONTAINS'),
-        ),
-        'result' => array(
-          'user' => array(
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['blocked', 'CONTAINS'],
+        ],
+        'result' => [
+          'user' => [
             $users['blocked']->id() => $user_labels['blocked'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('Anonymous', 'CONTAINS'),
-          array('anonymous', 'CONTAINS'),
-        ),
-        'result' => array(
-          'user' => array(
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['Anonymous', 'CONTAINS'],
+          ['anonymous', 'CONTAINS'],
+        ],
+        'result' => [
+          'user' => [
             $users['anonymous']->id() => $user_labels['anonymous'],
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'User handler (admin)');
 
     // Test the 'include_anonymous' option.
     $selection_options['handler_settings']['include_anonymous'] = FALSE;
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array('Anonymous', 'CONTAINS'),
-          array('anonymous', 'CONTAINS'),
-        ),
-        'result' => array(),
-      ),
-    );
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          ['Anonymous', 'CONTAINS'],
+          ['anonymous', 'CONTAINS'],
+        ],
+        'result' => [],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'User handler (does not include anonymous)');
 
     // Check that the Anonymous user is not included in the results when no
     // label matching is done, for example when using the 'options_select'
     // widget.
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array(NULL),
-        ),
-        'result' => array(
-          'user' => array(
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          [NULL],
+        ],
+        'result' => [
+          'user' => [
             $users['admin']->id() => $user_labels['admin'],
             $users['non_admin']->id() => $user_labels['non_admin'],
             $users['blocked']->id() => $user_labels['blocked'],
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'User handler (does not include anonymous)');
   }
 
@@ -358,30 +358,30 @@ public function testUserHandler() {
    * Test the comment-specific overrides of the entity handler.
    */
   public function testCommentHandler() {
-    $selection_options = array(
+    $selection_options = [
       'target_type' => 'comment',
       'handler' => 'default',
-      'handler_settings' => array(
+      'handler_settings' => [
         'target_bundles' => NULL,
-      ),
-    );
+      ],
+    ];
 
     // Build a set of test data.
-    $node_values = array(
-      'published' => array(
+    $node_values = [
+      'published' => [
         'type' => 'article',
         'status' => 1,
         'title' => 'Node published',
         'uid' => 1,
-      ),
-      'unpublished' => array(
+      ],
+      'unpublished' => [
         'type' => 'article',
         'status' => 0,
         'title' => 'Node unpublished',
         'uid' => 1,
-      ),
-    );
-    $nodes = array();
+      ],
+    ];
+    $nodes = [];
     foreach ($node_values as $key => $values) {
       $node = Node::create($values);
       $node->save();
@@ -391,8 +391,8 @@ public function testCommentHandler() {
     // Create comment field on article.
     $this->addDefaultCommentField('node', 'article');
 
-    $comment_values = array(
-      'published_published' => array(
+    $comment_values = [
+      'published_published' => [
         'entity_id' => $nodes['published']->id(),
         'entity_type' => 'node',
         'field_name' => 'comment',
@@ -402,8 +402,8 @@ public function testCommentHandler() {
         'status' => CommentInterface::PUBLISHED,
         'subject' => 'Comment Published <&>',
         'language' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-      ),
-      'published_unpublished' => array(
+      ],
+      'published_unpublished' => [
         'entity_id' => $nodes['published']->id(),
         'entity_type' => 'node',
         'field_name' => 'comment',
@@ -413,8 +413,8 @@ public function testCommentHandler() {
         'status' => CommentInterface::NOT_PUBLISHED,
         'subject' => 'Comment Unpublished <&>',
         'language' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-      ),
-      'unpublished_published' => array(
+      ],
+      'unpublished_published' => [
         'entity_id' => $nodes['unpublished']->id(),
         'entity_type' => 'node',
         'field_name' => 'comment',
@@ -424,11 +424,11 @@ public function testCommentHandler() {
         'status' => CommentInterface::NOT_PUBLISHED,
         'subject' => 'Comment Published on Unpublished node <&>',
         'language' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-      ),
-    );
+      ],
+    ];
 
-    $comments = array();
-    $comment_labels = array();
+    $comments = [];
+    $comment_labels = [];
     foreach ($comment_values as $key => $values) {
       $comment = Comment::create($values);
       $comment->save();
@@ -437,79 +437,79 @@ public function testCommentHandler() {
     }
 
     // Test as a non-admin.
-    $normal_user = $this->drupalCreateUser(array('access content', 'access comments'));
+    $normal_user = $this->drupalCreateUser(['access content', 'access comments']);
     \Drupal::currentUser()->setAccount($normal_user);
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array(NULL, 'CONTAINS'),
-        ),
-        'result' => array(
-          'comment' => array(
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          [NULL, 'CONTAINS'],
+        ],
+        'result' => [
+          'comment' => [
             $comments['published_published']->cid->value => $comment_labels['published_published'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('Published', 'CONTAINS'),
-        ),
-        'result' => array(
-          'comment' => array(
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['Published', 'CONTAINS'],
+        ],
+        'result' => [
+          'comment' => [
             $comments['published_published']->cid->value => $comment_labels['published_published'],
-          ),
-        ),
-      ),
-      array(
-        'arguments' => array(
-          array('invalid comment', 'CONTAINS'),
-        ),
-        'result' => array(),
-      ),
-      array(
-        'arguments' => array(
-          array('Comment Unpublished', 'CONTAINS'),
-        ),
-        'result' => array(),
-      ),
-    );
+          ],
+        ],
+      ],
+      [
+        'arguments' => [
+          ['invalid comment', 'CONTAINS'],
+        ],
+        'result' => [],
+      ],
+      [
+        'arguments' => [
+          ['Comment Unpublished', 'CONTAINS'],
+        ],
+        'result' => [],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'Comment handler');
 
     // Test as a comment admin.
-    $admin_user = $this->drupalCreateUser(array('access content', 'access comments', 'administer comments'));
+    $admin_user = $this->drupalCreateUser(['access content', 'access comments', 'administer comments']);
     \Drupal::currentUser()->setAccount($admin_user);
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array(NULL, 'CONTAINS'),
-        ),
-        'result' => array(
-          'comment' => array(
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          [NULL, 'CONTAINS'],
+        ],
+        'result' => [
+          'comment' => [
             $comments['published_published']->cid->value => $comment_labels['published_published'],
             $comments['published_unpublished']->cid->value => $comment_labels['published_unpublished'],
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'Comment handler (comment admin)');
 
     // Test as a node and comment admin.
-    $admin_user = $this->drupalCreateUser(array('access content', 'access comments', 'administer comments', 'bypass node access'));
+    $admin_user = $this->drupalCreateUser(['access content', 'access comments', 'administer comments', 'bypass node access']);
     \Drupal::currentUser()->setAccount($admin_user);
-    $referenceable_tests = array(
-      array(
-        'arguments' => array(
-          array(NULL, 'CONTAINS'),
-        ),
-        'result' => array(
-          'comment' => array(
+    $referenceable_tests = [
+      [
+        'arguments' => [
+          [NULL, 'CONTAINS'],
+        ],
+        'result' => [
+          'comment' => [
             $comments['published_published']->cid->value => $comment_labels['published_published'],
             $comments['published_unpublished']->cid->value => $comment_labels['published_unpublished'],
             $comments['unpublished_published']->cid->value => $comment_labels['unpublished_published'],
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
     $this->assertReferenceable($selection_options, $referenceable_tests, 'Comment handler (comment + node admin)');
   }
 
diff --git a/core/modules/system/tests/src/Functional/Entity/EntityRevisionsTest.php b/core/modules/system/tests/src/Functional/Entity/EntityRevisionsTest.php
index ccc48df524fe810e4913bc40c8668b8de2b01d7a..38db0e9dc0e3e93b39104332582b3a4adc03a5c1 100644
--- a/core/modules/system/tests/src/Functional/Entity/EntityRevisionsTest.php
+++ b/core/modules/system/tests/src/Functional/Entity/EntityRevisionsTest.php
@@ -19,7 +19,7 @@ class EntityRevisionsTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'language');
+  public static $modules = ['entity_test', 'language'];
 
   /**
    * A user with permission to administer entity_test content.
@@ -32,10 +32,10 @@ protected function setUp() {
     parent::setUp();
 
     // Create and log in user.
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'administer entity_test content',
       'view test entity',
-    ));
+    ]);
     $this->drupalLogin($this->webUser);
 
     // Enable an additional language.
@@ -64,17 +64,17 @@ protected function runRevisionsTests($entity_type) {
     // Create initial entity.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'name' => 'foo',
         'user_id' => $this->webUser->id(),
-      ));
+      ]);
     $entity->field_test_text->value = 'bar';
     $entity->save();
 
-    $names = array();
-    $texts = array();
-    $created = array();
-    $revision_ids = array();
+    $names = [];
+    $texts = [];
+    $created = [];
+    $revision_ids = [];
 
     // Create three revisions.
     $revision_count = 3;
@@ -93,9 +93,9 @@ protected function runRevisionsTests($entity_type) {
       $revision_ids[] = $entity->revision_id->value;
 
       // Check that the fields and properties contain new content.
-      $this->assertTrue($entity->revision_id->value > $legacy_revision_id, format_string('%entity_type: Revision ID changed.', array('%entity_type' => $entity_type)));
-      $this->assertNotEqual($entity->name->value, $legacy_name, format_string('%entity_type: Name changed.', array('%entity_type' => $entity_type)));
-      $this->assertNotEqual($entity->field_test_text->value, $legacy_text, format_string('%entity_type: Text changed.', array('%entity_type' => $entity_type)));
+      $this->assertTrue($entity->revision_id->value > $legacy_revision_id, format_string('%entity_type: Revision ID changed.', ['%entity_type' => $entity_type]));
+      $this->assertNotEqual($entity->name->value, $legacy_name, format_string('%entity_type: Name changed.', ['%entity_type' => $entity_type]));
+      $this->assertNotEqual($entity->field_test_text->value, $legacy_text, format_string('%entity_type: Text changed.', ['%entity_type' => $entity_type]));
     }
 
     $storage = $this->container->get('entity_type.manager')->getStorage($entity_type);
@@ -104,13 +104,13 @@ protected function runRevisionsTests($entity_type) {
       $entity_revision = $storage->loadRevision($revision_ids[$i]);
 
       // Check if properties and fields contain the revision specific content.
-      $this->assertEqual($entity_revision->revision_id->value, $revision_ids[$i], format_string('%entity_type: Revision ID matches.', array('%entity_type' => $entity_type)));
-      $this->assertEqual($entity_revision->name->value, $names[$i], format_string('%entity_type: Name matches.', array('%entity_type' => $entity_type)));
-      $this->assertEqual($entity_revision->field_test_text->value, $texts[$i], format_string('%entity_type: Text matches.', array('%entity_type' => $entity_type)));
+      $this->assertEqual($entity_revision->revision_id->value, $revision_ids[$i], format_string('%entity_type: Revision ID matches.', ['%entity_type' => $entity_type]));
+      $this->assertEqual($entity_revision->name->value, $names[$i], format_string('%entity_type: Name matches.', ['%entity_type' => $entity_type]));
+      $this->assertEqual($entity_revision->field_test_text->value, $texts[$i], format_string('%entity_type: Text matches.', ['%entity_type' => $entity_type]));
 
       // Check non-revisioned values are loaded.
-      $this->assertTrue(isset($entity_revision->created->value), format_string('%entity_type: Non-revisioned field is loaded.', array('%entity_type' => $entity_type)));
-      $this->assertEqual($entity_revision->created->value, $created[2], format_string('%entity_type: Non-revisioned field value is the same between revisions.', array('%entity_type' => $entity_type)));
+      $this->assertTrue(isset($entity_revision->created->value), format_string('%entity_type: Non-revisioned field is loaded.', ['%entity_type' => $entity_type]));
+      $this->assertEqual($entity_revision->created->value, $created[2], format_string('%entity_type: Non-revisioned field value is the same between revisions.', ['%entity_type' => $entity_type]));
     }
 
     // Confirm the correct revision text appears in the edit form.
@@ -118,8 +118,8 @@ protected function runRevisionsTests($entity_type) {
       ->getStorage($entity_type)
       ->load($entity->id->value);
     $this->drupalGet($entity_type . '/manage/' . $entity->id->value . '/edit');
-    $this->assertFieldById('edit-name-0-value', $entity->name->value, format_string('%entity_type: Name matches in UI.', array('%entity_type' => $entity_type)));
-    $this->assertFieldById('edit-field-test-text-0-value', $entity->field_test_text->value, format_string('%entity_type: Text matches in UI.', array('%entity_type' => $entity_type)));
+    $this->assertFieldById('edit-name-0-value', $entity->name->value, format_string('%entity_type: Name matches in UI.', ['%entity_type' => $entity_type]));
+    $this->assertFieldById('edit-field-test-text-0-value', $entity->field_test_text->value, format_string('%entity_type: Text matches in UI.', ['%entity_type' => $entity_type]));
   }
 
   /**
diff --git a/core/modules/system/tests/src/Functional/Entity/EntityViewControllerTest.php b/core/modules/system/tests/src/Functional/Entity/EntityViewControllerTest.php
index 871892955dc7c8b48e43b91e84e3b44eb21dd5d0..11a9b2e4a9e949c7c302fdfad3d80c3ef5a38f12 100644
--- a/core/modules/system/tests/src/Functional/Entity/EntityViewControllerTest.php
+++ b/core/modules/system/tests/src/Functional/Entity/EntityViewControllerTest.php
@@ -17,14 +17,14 @@ class EntityViewControllerTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test');
+  public static $modules = ['entity_test'];
 
   /**
    * Array of test entities.
    *
    * @var array
    */
-  protected $entities = array();
+  protected $entities = [];
 
   protected function setUp() {
     parent::setUp();
@@ -86,7 +86,7 @@ function testEntityViewController() {
   public function testFieldItemAttributes() {
     // Make sure the test field will be rendered.
     entity_get_display('entity_test', 'entity_test', 'default')
-      ->setComponent('field_test_text', array('type' => 'text_default'))
+      ->setComponent('field_test_text', ['type' => 'text_default'])
       ->save();
 
     // Create an entity and save test value in field_test_text.
@@ -98,24 +98,24 @@ public function testFieldItemAttributes() {
     // Browse to the entity and verify that the attribute is rendered in the
     // field item HTML markup.
     $this->drupalGet('entity_test/' . $entity->id());
-    $xpath = $this->xpath('//div[@data-field-item-attr="foobar"]/p[text()=:value]', array(':value' => $test_value));
+    $xpath = $this->xpath('//div[@data-field-item-attr="foobar"]/p[text()=:value]', [':value' => $test_value]);
     $this->assertTrue($xpath, 'The field item attribute has been found in the rendered output of the field.');
 
     // Enable the RDF module to ensure that two modules can add attributes to
     // the same field item.
-    \Drupal::service('module_installer')->install(array('rdf'));
+    \Drupal::service('module_installer')->install(['rdf']);
     $this->resetAll();
 
     // Set an RDF mapping for the field_test_text field. This RDF mapping will
     // be turned into RDFa attributes in the field item output.
     $mapping = rdf_get_mapping('entity_test', 'entity_test');
-    $mapping->setFieldMapping('field_test_text', array(
-      'properties' => array('schema:text'),
-    ))->save();
+    $mapping->setFieldMapping('field_test_text', [
+      'properties' => ['schema:text'],
+    ])->save();
     // Browse to the entity and verify that the attributes from both modules
     // are rendered in the field item HTML markup.
     $this->drupalGet('entity_test/' . $entity->id());
-    $xpath = $this->xpath('//div[@data-field-item-attr="foobar" and @property="schema:text"]/p[text()=:value]', array(':value' => $test_value));
+    $xpath = $this->xpath('//div[@data-field-item-attr="foobar" and @property="schema:text"]/p[text()=:value]', [':value' => $test_value]);
     $this->assertTrue($xpath, 'The field item attributes from both modules have been found in the rendered output of the field.');
   }
 
@@ -139,10 +139,10 @@ public function testEntityViewControllerViewBuilder() {
    *   The created entity.
    */
   protected function createTestEntity($entity_type) {
-    $data = array(
+    $data = [
       'bundle' => $entity_type,
       'name' => $this->randomMachineName(),
-    );
+    ];
     return $this->container->get('entity.manager')->getStorage($entity_type)->create($data);
   }
 
diff --git a/core/modules/system/tests/src/Functional/File/ConfigTest.php b/core/modules/system/tests/src/Functional/File/ConfigTest.php
index ea73322df2e501f7265761f40f3046ca97ed563b..9ac71dc500b5c874906762d11e660195bb699491 100644
--- a/core/modules/system/tests/src/Functional/File/ConfigTest.php
+++ b/core/modules/system/tests/src/Functional/File/ConfigTest.php
@@ -13,7 +13,7 @@ class ConfigTest extends BrowserTestBase {
 
   protected function setUp(){
     parent::setUp();
-    $this->drupalLogin ($this->drupalCreateUser(array('administer site configuration')));
+    $this->drupalLogin ($this->drupalCreateUser(['administer site configuration']));
   }
 
   /**
@@ -26,10 +26,10 @@ function testFileConfigurationPage() {
     // The respective directories are created automatically
     // upon form submission.
     $file_path = $this->publicFilesDirectory;
-    $fields = array(
+    $fields = [
       'file_temporary_path' => $file_path . '/file_config_page_test/temporary',
       'file_default_scheme' => 'private',
-    );
+    ];
 
     // Check that public and private can be selected as default scheme.
     $this->assertText('Public local files served by the webserver.');
@@ -43,10 +43,10 @@ function testFileConfigurationPage() {
 
     // Remove the private path, rebuild the container and verify that private
     // can no longer be selected in the UI.
-    $settings['settings']['file_private_path'] = (object) array(
+    $settings['settings']['file_private_path'] = (object) [
       'value' => '',
       'required' => TRUE,
-    );
+    ];
     $this->writeSettings($settings);
     $this->rebuildContainer();
 
diff --git a/core/modules/system/tests/src/Functional/FileTransfer/FileTransferTest.php b/core/modules/system/tests/src/Functional/FileTransfer/FileTransferTest.php
index 985e21a59483a59b3c986e1b3aa8d2c5aab81953..85d624d76b8b78cbbaea5db7c180a07bddd5e0c3 100644
--- a/core/modules/system/tests/src/Functional/FileTransfer/FileTransferTest.php
+++ b/core/modules/system/tests/src/Functional/FileTransfer/FileTransferTest.php
@@ -20,20 +20,20 @@ class FileTransferTest extends BrowserTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->testConnection = TestFileTransfer::factory(\Drupal::root(), array('hostname' => $this->hostname, 'username' => $this->username, 'password' => $this->password, 'port' => $this->port));
+    $this->testConnection = TestFileTransfer::factory(\Drupal::root(), ['hostname' => $this->hostname, 'username' => $this->username, 'password' => $this->password, 'port' => $this->port]);
   }
 
   function _getFakeModuleFiles() {
-    $files = array(
+    $files = [
       'fake.module',
       'fake.info.yml',
-      'theme' => array(
+      'theme' => [
         'fake.html.twig'
-      ),
-      'inc' => array(
+      ],
+      'inc' => [
         'fake.inc'
-      )
-    );
+      ]
+    ];
     return $files;
   }
 
@@ -41,7 +41,7 @@ function _buildFakeModule() {
     $location = 'temporary://fake';
     if (is_dir($location)) {
       $ret = 0;
-      $output = array();
+      $output = [];
       exec('rm -Rf ' . escapeshellarg($location), $output, $ret);
       if ($ret != 0) {
         throw new Exception('Error removing fake module directory.');
@@ -53,7 +53,7 @@ function _buildFakeModule() {
     return $location;
   }
 
-  function _writeDirectory($base, $files = array()) {
+  function _writeDirectory($base, $files = []) {
     mkdir($base);
     foreach ($files as $key => $file) {
       if (is_array($file)) {
diff --git a/core/modules/system/tests/src/Functional/FileTransfer/MockTestConnection.php b/core/modules/system/tests/src/Functional/FileTransfer/MockTestConnection.php
index 6d877b279dc041436dcc8f49d9975ce875375a5b..e645f4e4fbf5047e08fd02c7a4c444afbf3847d3 100644
--- a/core/modules/system/tests/src/Functional/FileTransfer/MockTestConnection.php
+++ b/core/modules/system/tests/src/Functional/FileTransfer/MockTestConnection.php
@@ -7,7 +7,7 @@
  */
 class MockTestConnection {
 
-  protected $commandsRun = array();
+  protected $commandsRun = [];
   public $connectionString;
 
   function run($cmd) {
@@ -16,7 +16,7 @@ function run($cmd) {
 
   function flushCommands() {
     $out = $this->commandsRun;
-    $this->commandsRun = array();
+    $this->commandsRun = [];
     return $out;
   }
 
diff --git a/core/modules/system/tests/src/Functional/FileTransfer/TestFileTransfer.php b/core/modules/system/tests/src/Functional/FileTransfer/TestFileTransfer.php
index 04e282f914614db47c925421d8726e2c43aa3170..e02ee98e4b8dd367020ec16d4b83d66cea92f623 100644
--- a/core/modules/system/tests/src/Functional/FileTransfer/TestFileTransfer.php
+++ b/core/modules/system/tests/src/Functional/FileTransfer/TestFileTransfer.php
@@ -46,7 +46,7 @@ function createDirectoryJailed($directory) {
 
   function removeFileJailed($destination) {
     if (!ftp_delete($this->connection, $item)) {
-      throw new FileTransferException('Unable to remove to file @file.', NULL, array('@file' => $item));
+      throw new FileTransferException('Unable to remove to file @file.', NULL, ['@file' => $item]);
     }
   }
 
diff --git a/core/modules/system/tests/src/Functional/Form/ElementsAccessTest.php b/core/modules/system/tests/src/Functional/Form/ElementsAccessTest.php
index 0684c3d6cdaa7a0c1de779ec4feaf3099f66cc28..1a92893c3929b4ab575b40696e75ce1de91fe857 100644
--- a/core/modules/system/tests/src/Functional/Form/ElementsAccessTest.php
+++ b/core/modules/system/tests/src/Functional/Form/ElementsAccessTest.php
@@ -16,7 +16,7 @@ class ElementsAccessTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   /**
    * Ensures that child values are still processed when #access = FALSE.
diff --git a/core/modules/system/tests/src/Functional/Form/FormObjectTest.php b/core/modules/system/tests/src/Functional/Form/FormObjectTest.php
index a031198cc7afc362e5c42099f6906fddcd1dde61..67d7ecb0dd1b44756d18121cdb361f4eb55d32ed 100644
--- a/core/modules/system/tests/src/Functional/Form/FormObjectTest.php
+++ b/core/modules/system/tests/src/Functional/Form/FormObjectTest.php
@@ -17,19 +17,19 @@ class FormObjectTest extends SystemConfigFormTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test');
+  public static $modules = ['form_test'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->form = new FormTestObject($this->container->get('config.factory'));
-    $this->values = array(
-      'bananas' => array(
+    $this->values = [
+      'bananas' => [
         '#value' => $this->randomString(10),
         '#config_name' => 'form_test.object',
         '#config_key' => 'bananas',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -44,7 +44,7 @@ function testObjectFormCallback() {
     $this->assertText('The FormTestObject::buildForm() method was used for this form.');
     $elements = $this->xpath('//form[@id="form-test-form-test-object"]');
     $this->assertTrue(!empty($elements), 'The correct form ID was used.');
-    $this->drupalPostForm(NULL, array('bananas' => 'green'), t('Save'));
+    $this->drupalPostForm(NULL, ['bananas' => 'green'], t('Save'));
     $this->assertText('The FormTestObject::validateForm() method was used for this form.');
     $this->assertText('The FormTestObject::submitForm() method was used for this form.');
     $value = $config_factory->get('form_test.object')->get('bananas');
@@ -64,7 +64,7 @@ function testObjectFormCallback() {
     $this->assertText('The FormTestServiceObject::buildForm() method was used for this form.');
     $elements = $this->xpath('//form[@id="form-test-form-test-service-object"]');
     $this->assertTrue(!empty($elements), 'The correct form ID was used.');
-    $this->drupalPostForm(NULL, array('bananas' => 'brown'), t('Save'));
+    $this->drupalPostForm(NULL, ['bananas' => 'brown'], t('Save'));
     $this->assertText('The FormTestServiceObject::validateForm() method was used for this form.');
     $this->assertText('The FormTestServiceObject::submitForm() method was used for this form.');
     $value = $config_factory->get('form_test.object')->get('bananas');
@@ -77,7 +77,7 @@ function testObjectFormCallback() {
     $this->assertTrue(!empty($elements), 'The correct form ID was used.');
     $this->assertText('custom_value', 'Ensure parameters are injected from request attributes.');
     $this->assertText('request_value', 'Ensure the request object is injected.');
-    $this->drupalPostForm(NULL, array('bananas' => 'black'), t('Save'));
+    $this->drupalPostForm(NULL, ['bananas' => 'black'], t('Save'));
     $this->assertText('The FormTestControllerObject::validateForm() method was used for this form.');
     $this->assertText('The FormTestControllerObject::submitForm() method was used for this form.');
     $value = $config_factory->get('form_test.object')->get('bananas');
diff --git a/core/modules/system/tests/src/Functional/Form/ModulesListFormWebTest.php b/core/modules/system/tests/src/Functional/Form/ModulesListFormWebTest.php
index 640a60dd33366d9958511824d210775d253b2f35..dc63e64d72d8cf623d6202d26f828082dca1c7a6 100644
--- a/core/modules/system/tests/src/Functional/Form/ModulesListFormWebTest.php
+++ b/core/modules/system/tests/src/Functional/Form/ModulesListFormWebTest.php
@@ -14,7 +14,7 @@ class ModulesListFormWebTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('system_test', 'help');
+  public static $modules = ['system_test', 'help'];
 
   /**
    * {@inheritdoc}
@@ -30,7 +30,7 @@ protected function setUp() {
   public function testModuleListForm() {
     $this->drupalLogin(
       $this->drupalCreateUser(
-        array('administer modules', 'administer permissions')
+        ['administer modules', 'administer permissions']
       )
     );
     $this->drupalGet('admin/modules');
diff --git a/core/modules/system/tests/src/Functional/Form/RedirectTest.php b/core/modules/system/tests/src/Functional/Form/RedirectTest.php
index d369b9ccb6e449a718cccd18b158ca5a6b156528..6c09c2d82233ad6c6fd7a667761cba64b6f8c638 100644
--- a/core/modules/system/tests/src/Functional/Form/RedirectTest.php
+++ b/core/modules/system/tests/src/Functional/Form/RedirectTest.php
@@ -16,60 +16,60 @@ class RedirectTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('form_test', 'block');
+  public static $modules = ['form_test', 'block'];
 
   /**
    * Tests form redirection.
    */
   function testRedirect() {
     $path = 'form-test/redirect';
-    $options = array('query' => array('foo' => 'bar'));
+    $options = ['query' => ['foo' => 'bar']];
     $options['absolute'] = TRUE;
 
     // Test basic redirection.
-    $edit = array(
+    $edit = [
       'redirection' => TRUE,
       'destination' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Submit'));
-    $this->assertUrl($edit['destination'], array(), 'Basic redirection works.');
+    $this->assertUrl($edit['destination'], [], 'Basic redirection works.');
 
 
     // Test without redirection.
-    $edit = array(
+    $edit = [
       'redirection' => FALSE,
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Submit'));
-    $this->assertUrl($path, array(), 'When redirect is set to FALSE, there should be no redirection.');
+    $this->assertUrl($path, [], 'When redirect is set to FALSE, there should be no redirection.');
 
     // Test redirection with query parameters.
-    $edit = array(
+    $edit = [
       'redirection' => TRUE,
       'destination' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Submit'), $options);
-    $this->assertUrl($edit['destination'], array(), 'Redirection with query parameters works.');
+    $this->assertUrl($edit['destination'], [], 'Redirection with query parameters works.');
 
     // Test without redirection but with query parameters.
-    $edit = array(
+    $edit = [
       'redirection' => FALSE,
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Submit'), $options);
     $this->assertUrl($path, $options, 'When redirect is set to FALSE, there should be no redirection, and the query parameters should be passed along.');
 
     // Test redirection back to the original path.
-    $edit = array(
+    $edit = [
       'redirection' => TRUE,
       'destination' => '',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Submit'));
-    $this->assertUrl($path, array(), 'When using an empty redirection string, there should be no redirection.');
+    $this->assertUrl($path, [], 'When using an empty redirection string, there should be no redirection.');
 
     // Test redirection back to the original path with query parameters.
-    $edit = array(
+    $edit = [
       'redirection' => TRUE,
       'destination' => '',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Submit'), $options);
     $this->assertUrl($path, $options, 'When using an empty redirection string, there should be no redirection, and the query parameters should be passed along.');
   }
@@ -82,15 +82,15 @@ public function testRedirectFromErrorPages() {
     $this->drupalPlaceBlock('redirect_form_block');
 
     // Create a user that does not have permission to administer blocks.
-    $user = $this->drupalCreateUser(array('administer themes'));
+    $user = $this->drupalCreateUser(['administer themes']);
     $this->drupalLogin($user);
 
     // Visit page 'foo' (404 page) and submit the form. Verify it ends up
     // at the right URL.
-    $expected = \Drupal::url('form_test.route1', array(), array('query' => array('test1' => 'test2'), 'absolute' => TRUE));
+    $expected = \Drupal::url('form_test.route1', [], ['query' => ['test1' => 'test2'], 'absolute' => TRUE]);
     $this->drupalGet('foo');
     $this->assertResponse(404);
-    $this->drupalPostForm(NULL, array(), t('Submit'));
+    $this->drupalPostForm(NULL, [], t('Submit'));
     $this->assertResponse(200);
     $this->assertUrl($expected, [], 'Redirected to correct URL/query.');
 
@@ -98,7 +98,7 @@ public function testRedirectFromErrorPages() {
     // ends up at the right URL.
     $this->drupalGet('admin/structure/block');
     $this->assertResponse(403);
-    $this->drupalPostForm(NULL, array(), t('Submit'));
+    $this->drupalPostForm(NULL, [], t('Submit'));
     $this->assertResponse(200);
     $this->assertUrl($expected, [], 'Redirected to correct URL/query.');
   }
diff --git a/core/modules/system/tests/src/Functional/Lock/LockFunctionalTest.php b/core/modules/system/tests/src/Functional/Lock/LockFunctionalTest.php
index 5e2012178885737d1f249caf6023e42ab4a02b1d..0b13f18d6266ace1f22044686939a40202cbc221 100644
--- a/core/modules/system/tests/src/Functional/Lock/LockFunctionalTest.php
+++ b/core/modules/system/tests/src/Functional/Lock/LockFunctionalTest.php
@@ -16,7 +16,7 @@ class LockFunctionalTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('system_test');
+  public static $modules = ['system_test'];
 
   /**
    * Confirms that we can acquire and release locks in two parallel requests.
diff --git a/core/modules/system/tests/src/Functional/Mail/HtmlToTextTest.php b/core/modules/system/tests/src/Functional/Mail/HtmlToTextTest.php
index cbcf87fd708b614561a3a3f2f822871c4f8b4b7c..bdbfd749c94804008963a43757f2626823836e0c 100644
--- a/core/modules/system/tests/src/Functional/Mail/HtmlToTextTest.php
+++ b/core/modules/system/tests/src/Functional/Mail/HtmlToTextTest.php
@@ -27,8 +27,8 @@ class HtmlToTextTest extends BrowserTestBase {
   protected function stringToHtml($text) {
     return '"' .
       str_replace(
-        array("\n", ' '),
-        array('\n', '&nbsp;'),
+        ["\n", ' '],
+        ['\n', '&nbsp;'],
         Html::escape($text)
       ) . '"';
   }
@@ -68,7 +68,7 @@ protected function assertHtmlToText($html, $text, $message, $allowed_tags = NULL
    */
   public function testTags() {
     global $base_path, $base_url;
-    $tests = array(
+    $tests = [
       // @todo Trailing linefeeds should be trimmed.
       '<a href = "https://www.drupal.org">Drupal.org</a>' => "Drupal.org [1]\n\n[1] https://www.drupal.org\n",
       // @todo Footer URLs should be absolute.
@@ -151,7 +151,7 @@ public function testTags() {
       // A couple of tests for Unicode characters.
       '<q>I <em>will</em> be back…</q>' => "I /will/ be back…\n",
       'FrançAIS is ÜBER-åwesome' => "FrançAIS is ÜBER-åwesome\n",
-    );
+    ];
 
     foreach ($tests as $html => $text) {
       $this->assertHtmlToText($html, $text, 'Supported tags');
@@ -168,27 +168,27 @@ public function testDrupalHtmlToTextArgs() {
       'Drupal <b>Drupal</b> Drupal',
       "Drupal *Drupal* Drupal\n",
       'Allowed <b> tag found',
-      array('b')
+      ['b']
     );
     $this->assertHtmlToText(
       'Drupal <h1>Drupal</h1> Drupal',
       "Drupal Drupal Drupal\n",
       'Disallowed <h1> tag not found',
-      array('b')
+      ['b']
     );
 
     $this->assertHtmlToText(
       'Drupal <p><em><b>Drupal</b></em><p> Drupal',
       "Drupal Drupal Drupal\n",
       'Disallowed <p>, <em>, and <b> tags not found',
-      array('a', 'br', 'h1')
+      ['a', 'br', 'h1']
     );
 
     $this->assertHtmlToText(
       '<html><body>Drupal</body></html>',
       "Drupal\n",
       'Unsupported <html> and <body> tags not found',
-      array('html', 'body')
+      ['html', 'body']
     );
   }
 
@@ -203,7 +203,7 @@ public function testDrupalHtmltoTextCollapsesWhitespace() {
       $input,
       $collapsed,
       'Whitespace is collapsed',
-      array('p')
+      ['p']
     );
   }
 
@@ -312,17 +312,17 @@ public function testFootnoteReferences() {
    * and spaces are properly handled.
    */
   public function testDrupalHtmlToTextParagraphs() {
-    $tests = array();
-    $tests[] = array(
+    $tests = [];
+    $tests[] = [
         'html' => "<p>line 1<br />\nline 2<br />line 3\n<br />line 4</p><p>paragraph</p>",
         // @todo Trailing line breaks should be trimmed.
         'text' => "line 1\nline 2\nline 3\nline 4\n\nparagraph\n\n",
-    );
-    $tests[] = array(
+    ];
+    $tests[] = [
       'html' => "<p>line 1<br /> line 2</p> <p>line 4<br /> line 5</p> <p>0</p>",
       // @todo Trailing line breaks should be trimmed.
       'text' => "line 1\nline 2\n\nline 4\nline 5\n\n0\n\n",
-    );
+    ];
     foreach ($tests as $test) {
       $this->assertHtmlToText($test['html'], $test['text'], 'Paragraph breaks');
     }
diff --git a/core/modules/system/tests/src/Functional/Mail/MailTest.php b/core/modules/system/tests/src/Functional/Mail/MailTest.php
index 6550f095ce574d472a875a445f1d3c9419daad2c..74549a3211e36130d3c7d1edb3be4d5a4d49eb01 100644
--- a/core/modules/system/tests/src/Functional/Mail/MailTest.php
+++ b/core/modules/system/tests/src/Functional/Mail/MailTest.php
@@ -18,7 +18,7 @@ class MailTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('simpletest', 'system_mail_failure_test');
+  public static $modules = ['simpletest', 'system_mail_failure_test'];
 
   /**
    * Assert that the pluggable mail system is functional.
@@ -28,7 +28,7 @@ public function testPluggableFramework() {
     $this->config('system.mail')->set('interface.default', 'test_php_mail_failure')->save();
 
     // Get the default MailInterface class instance.
-    $mail_backend = \Drupal::service('plugin.manager.mail')->getInstance(array('module' => 'default', 'key' => 'default'));
+    $mail_backend = \Drupal::service('plugin.manager.mail')->getInstance(['module' => 'default', 'key' => 'default']);
 
     // Assert whether the default mail backend is an instance of the expected
     // class.
@@ -38,7 +38,7 @@ public function testPluggableFramework() {
     $this->config('system.mail')->set('interface.mymodule_testkey', 'test_mail_collector')->save();
 
     // Get the added MailInterface class instance.
-    $mail_backend = \Drupal::service('plugin.manager.mail')->getInstance(array('module' => 'mymodule', 'key' => 'testkey'));
+    $mail_backend = \Drupal::service('plugin.manager.mail')->getInstance(['module' => 'mymodule', 'key' => 'testkey']);
 
     // Assert whether the added mail backend is an instance of the expected
     // class.
@@ -56,7 +56,7 @@ public function testCancelMessage() {
     // Use the state system collector mail backend.
     $this->config('system.mail')->set('interface.default', 'test_mail_collector')->save();
     // Reset the state variable that holds sent messages.
-    \Drupal::state()->set('system.test_mail_collector', array());
+    \Drupal::state()->set('system.test_mail_collector', []);
 
     // Send a test message that simpletest_mail_alter should cancel.
     \Drupal::service('plugin.manager.mail')->mail('simpletest', 'cancel_test', 'cancel@example.com', $language_interface->getId());
@@ -77,11 +77,11 @@ public function testFromAndReplyToHeader() {
     // Use the state system collector mail backend.
     $this->config('system.mail')->set('interface.default', 'test_mail_collector')->save();
     // Reset the state variable that holds sent messages.
-    \Drupal::state()->set('system.test_mail_collector', array());
+    \Drupal::state()->set('system.test_mail_collector', []);
     // Send an email with a reply-to address specified.
     $from_email = 'Drupal <simpletest@example.com>';
     $reply_email = 'someone_else@example.com';
-    \Drupal::service('plugin.manager.mail')->mail('simpletest', 'from_test', 'from_test@example.com', $language, array(), $reply_email);
+    \Drupal::service('plugin.manager.mail')->mail('simpletest', 'from_test', 'from_test@example.com', $language, [], $reply_email);
     // Test that the reply-to email is just the email and not the site name
     // and default sender email.
     $captured_emails = \Drupal::state()->get('system.test_mail_collector');
diff --git a/core/modules/system/tests/src/Functional/Menu/MenuAccessTest.php b/core/modules/system/tests/src/Functional/Menu/MenuAccessTest.php
index 3156823c2f1a7d54362fcad19245eb76bda41a3e..10af396a6d74497d4af5a30e9f2ae752de42d63c 100644
--- a/core/modules/system/tests/src/Functional/Menu/MenuAccessTest.php
+++ b/core/modules/system/tests/src/Functional/Menu/MenuAccessTest.php
@@ -56,10 +56,10 @@ public function testMenuBlockLinksAccessCheck() {
     // Attempt to access a restricted local task.
     $this->drupalGet('foo/asdf/c');
     $this->assertResponse(403);
-    $elements = $this->xpath('//ul[@class=:class]/li/a[@href=:href]', array(
+    $elements = $this->xpath('//ul[@class=:class]/li/a[@href=:href]', [
       ':class' => 'tabs primary',
       ':href' => Url::fromRoute('menu_test.router_test1', ['bar' => 'asdf'])->toString(),
-    ));
+    ]);
     $this->assertTrue(empty($elements), 'No tab linking to foo/asdf found');
     $this->assertNoLinkByHref('foo/asdf/b');
     $this->assertNoLinkByHref('foo/asdf/c');
diff --git a/core/modules/system/tests/src/Functional/Module/ClassLoaderTest.php b/core/modules/system/tests/src/Functional/Module/ClassLoaderTest.php
index a9272394dfcb166c674262d0b46626b6f5ced814..9a81499a2804e83fb6ebec3f484058914c57be03 100644
--- a/core/modules/system/tests/src/Functional/Module/ClassLoaderTest.php
+++ b/core/modules/system/tests/src/Functional/Module/ClassLoaderTest.php
@@ -23,7 +23,7 @@ class ClassLoaderTest extends BrowserTestBase {
    */
   function testClassLoading() {
     // Enable the module_test and module_autoload_test modules.
-    \Drupal::service('module_installer')->install(array('module_test', 'module_autoload_test'), FALSE);
+    \Drupal::service('module_installer')->install(['module_test', 'module_autoload_test'], FALSE);
     $this->resetAll();
     // Check twice to test an unprimed and primed system_list() cache.
     for ($i = 0; $i < 2; $i++) {
@@ -40,7 +40,7 @@ function testClassLoading() {
    */
   function testClassLoadingNotInstalledModules() {
     // Enable the module_test module.
-    \Drupal::service('module_installer')->install(array('module_test'), FALSE);
+    \Drupal::service('module_installer')->install(['module_test'], FALSE);
     $this->resetAll();
     // Check twice to test an unprimed and primed system_list() cache.
     for ($i = 0; $i < 2; $i++) {
@@ -57,10 +57,10 @@ function testClassLoadingNotInstalledModules() {
    */
   function testClassLoadingDisabledModules() {
     // Enable the module_test and module_autoload_test modules.
-    \Drupal::service('module_installer')->install(array('module_test', 'module_autoload_test'), FALSE);
+    \Drupal::service('module_installer')->install(['module_test', 'module_autoload_test'], FALSE);
     $this->resetAll();
     // Ensure that module_autoload_test is disabled.
-    $this->container->get('module_installer')->uninstall(array('module_autoload_test'), FALSE);
+    $this->container->get('module_installer')->uninstall(['module_autoload_test'], FALSE);
     $this->resetAll();
     // Check twice to test an unprimed and primed system_list() cache.
     for ($i = 0; $i < 2; $i++) {
diff --git a/core/modules/system/tests/src/Functional/Module/InstallTest.php b/core/modules/system/tests/src/Functional/Module/InstallTest.php
index db0d1d3208601d887372565cb695293a36f9d775..ccbca6d3126173820a6cf13758561db9bb4821a0 100644
--- a/core/modules/system/tests/src/Functional/Module/InstallTest.php
+++ b/core/modules/system/tests/src/Functional/Module/InstallTest.php
@@ -17,7 +17,7 @@ class InstallTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('module_test');
+  public static $modules = ['module_test'];
 
   /**
    * Verify that drupal_get_schema() can be used during module installation.
@@ -36,7 +36,7 @@ public function testGetSchemaAtInstallTime() {
    * be an array.
    */
   public function testEnableUserTwice() {
-    \Drupal::service('module_installer')->install(array('user'), FALSE);
+    \Drupal::service('module_installer')->install(['user'], FALSE);
     $this->assertIdentical($this->config('core.extension')->get('module.user'), 0);
   }
 
@@ -70,9 +70,9 @@ public function testUninstallPostUpdateFunctions() {
    */
   public function testModuleNameLength() {
     $module_name = 'invalid_module_name_over_the_maximum_allowed_character_length';
-    $message = format_string('Exception thrown when enabling module %name with a name length over the allowed maximum', array('%name' => $module_name));
+    $message = format_string('Exception thrown when enabling module %name with a name length over the allowed maximum', ['%name' => $module_name]);
     try {
-      $this->container->get('module_installer')->install(array($module_name));
+      $this->container->get('module_installer')->install([$module_name]);
       $this->fail($message);
     }
     catch (ExtensionNameLengthException $e) {
@@ -80,9 +80,9 @@ public function testModuleNameLength() {
     }
 
     // Since for the UI, the submit callback uses FALSE, test that too.
-    $message = format_string('Exception thrown when enabling as if via the UI the module %name with a name length over the allowed maximum', array('%name' => $module_name));
+    $message = format_string('Exception thrown when enabling as if via the UI the module %name with a name length over the allowed maximum', ['%name' => $module_name]);
     try {
-      $this->container->get('module_installer')->install(array($module_name), FALSE);
+      $this->container->get('module_installer')->install([$module_name], FALSE);
       $this->fail($message);
     }
     catch (ExtensionNameLengthException $e) {
diff --git a/core/modules/system/tests/src/Functional/Module/ModuleTestBase.php b/core/modules/system/tests/src/Functional/Module/ModuleTestBase.php
index df9fbc6d7cf7c3c74ef0b908e8f73288f6324819..704cbbaf64d8548c9c092683f7f8a3c3b13ddcff 100644
--- a/core/modules/system/tests/src/Functional/Module/ModuleTestBase.php
+++ b/core/modules/system/tests/src/Functional/Module/ModuleTestBase.php
@@ -18,14 +18,14 @@ abstract class ModuleTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('system_test');
+  public static $modules = ['system_test'];
 
   protected $adminUser;
 
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('access administration pages', 'administer modules'));
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer modules']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -42,9 +42,9 @@ function assertTableCount($base_table, $count = TRUE) {
     $tables = db_find_tables(Database::getConnection()->prefixTables('{' . $base_table . '}') . '%');
 
     if ($count) {
-      return $this->assertTrue($tables, format_string('Tables matching "@base_table" found.', array('@base_table' => $base_table)));
+      return $this->assertTrue($tables, format_string('Tables matching "@base_table" found.', ['@base_table' => $base_table]));
     }
-    return $this->assertFalse($tables, format_string('Tables matching "@base_table" not found.', array('@base_table' => $base_table)));
+    return $this->assertFalse($tables, format_string('Tables matching "@base_table" not found.', ['@base_table' => $base_table]));
   }
 
   /**
@@ -61,7 +61,7 @@ function assertModuleTablesExist($module) {
         $tables_exist = FALSE;
       }
     }
-    return $this->assertTrue($tables_exist, format_string('All database tables defined by the @module module exist.', array('@module' => $module)));
+    return $this->assertTrue($tables_exist, format_string('All database tables defined by the @module module exist.', ['@module' => $module]));
   }
 
   /**
@@ -78,7 +78,7 @@ function assertModuleTablesDoNotExist($module) {
         $tables_exist = TRUE;
       }
     }
-    return $this->assertFalse($tables_exist, format_string('None of the database tables defined by the @module module exist.', array('@module' => $module)));
+    return $this->assertFalse($tables_exist, format_string('None of the database tables defined by the @module module exist.', ['@module' => $module]));
   }
 
   /**
@@ -120,7 +120,7 @@ function assertModuleConfig($module) {
     }
     // Verify that all configuration has been installed (which means that $names
     // is empty).
-    return $this->assertFalse($names, format_string('All default configuration of @module module found.', array('@module' => $module)));
+    return $this->assertFalse($names, format_string('All default configuration of @module module found.', ['@module' => $module]));
   }
 
   /**
@@ -134,7 +134,7 @@ function assertModuleConfig($module) {
    */
   function assertNoModuleConfig($module) {
     $names = \Drupal::configFactory()->listAll($module . '.');
-    return $this->assertFalse($names, format_string('No configuration found for @module module.', array('@module' => $module)));
+    return $this->assertFalse($names, format_string('No configuration found for @module module.', ['@module' => $module]));
   }
 
   /**
@@ -154,7 +154,7 @@ function assertModules(array $modules, $enabled) {
       else {
         $message = 'Module "@module" is not enabled.';
       }
-      $this->assertEqual($this->container->get('module_handler')->moduleExists($module), $enabled, format_string($message, array('@module' => $module)));
+      $this->assertEqual($this->container->get('module_handler')->moduleExists($module), $enabled, format_string($message, ['@module' => $module]));
     }
   }
 
@@ -178,7 +178,7 @@ function assertModules(array $modules, $enabled) {
    * @param $link
    *   A link to associate with the message.
    */
-  function assertLogMessage($type, $message, $variables = array(), $severity = RfcLogLevel::NOTICE, $link = '') {
+  function assertLogMessage($type, $message, $variables = [], $severity = RfcLogLevel::NOTICE, $link = '') {
     $count = db_select('watchdog', 'w')
       ->condition('type', $type)
       ->condition('message', $message)
@@ -188,7 +188,7 @@ function assertLogMessage($type, $message, $variables = array(), $severity = Rfc
       ->countQuery()
       ->execute()
       ->fetchField();
-    $this->assertTrue($count > 0, format_string('watchdog table contains @count rows for @message', array('@count' => $count, '@message' => format_string($message, $variables))));
+    $this->assertTrue($count > 0, format_string('watchdog table contains @count rows for @message', ['@count' => $count, '@message' => format_string($message, $variables)]));
   }
 
 }
diff --git a/core/modules/system/tests/src/Functional/Module/UninstallTest.php b/core/modules/system/tests/src/Functional/Module/UninstallTest.php
index 1977cd025ff69c80c8c2425205cad290e22b37de..c5225ee5776bf6f7c9968fd016eb5c7b9dbc66f3 100644
--- a/core/modules/system/tests/src/Functional/Module/UninstallTest.php
+++ b/core/modules/system/tests/src/Functional/Module/UninstallTest.php
@@ -21,7 +21,7 @@ class UninstallTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('module_test', 'user', 'views', 'node');
+  public static $modules = ['module_test', 'user', 'views', 'node'];
 
   /**
    * Tests the hook_modules_uninstalled() of the user module.
@@ -29,7 +29,7 @@ class UninstallTest extends BrowserTestBase {
   function testUserPermsUninstalled() {
     // Uninstalls the module_test module, so hook_modules_uninstalled()
     // is executed.
-    $this->container->get('module_installer')->uninstall(array('module_test'));
+    $this->container->get('module_installer')->uninstall(['module_test']);
 
     // Are the perms defined by module_test removed?
     $this->assertFalse(user_roles(FALSE, 'module_test perm'), 'Permissions were all removed.');
@@ -39,7 +39,7 @@ function testUserPermsUninstalled() {
    * Tests the Uninstall page and Uninstall confirmation page.
    */
   function testUninstallPage() {
-    $account = $this->drupalCreateUser(array('administer modules'));
+    $account = $this->drupalCreateUser(['administer modules']);
     $this->drupalLogin($account);
 
     // Create a node type.
@@ -67,7 +67,7 @@ function testUninstallPage() {
     $node->delete();
 
     // Uninstall module_test.
-    $edit = array();
+    $edit = [];
     $edit['uninstall[module_test]'] = TRUE;
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
     $this->assertNoText(\Drupal::translation()->translate('Configuration deletions'), 'No configuration deletions listed on the module install confirmation page.');
@@ -78,14 +78,14 @@ function testUninstallPage() {
 
     // Uninstall node testing that the configuration that will be deleted is
     // listed.
-    $node_dependencies = \Drupal::service('config.manager')->findConfigEntityDependentsAsEntities('module', array('node'));
-    $edit = array();
+    $node_dependencies = \Drupal::service('config.manager')->findConfigEntityDependentsAsEntities('module', ['node']);
+    $edit = [];
     $edit['uninstall[node]'] = TRUE;
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
     $this->assertText(\Drupal::translation()->translate('Configuration deletions'), 'Configuration deletions listed on the module install confirmation page.');
     $this->assertNoText(\Drupal::translation()->translate('Configuration updates'), 'No configuration updates listed on the module install confirmation page.');
 
-    $entity_types = array();
+    $entity_types = [];
     foreach ($node_dependencies as $entity) {
       $label = $entity->label() ?: $entity->id();
       $this->assertText($label);
@@ -103,7 +103,7 @@ function testUninstallPage() {
     // cleared during the uninstall.
     \Drupal::cache()->set('uninstall_test', 'test_uninstall_page', Cache::PERMANENT);
     $cached = \Drupal::cache()->get('uninstall_test');
-    $this->assertEqual($cached->data, 'test_uninstall_page', SafeMarkup::format('Cache entry found: @bin', array('@bin' => $cached->data)));
+    $this->assertEqual($cached->data, 'test_uninstall_page', SafeMarkup::format('Cache entry found: @bin', ['@bin' => $cached->data]));
 
     $this->drupalPostForm(NULL, NULL, t('Uninstall'));
     $this->assertText(t('The selected modules have been uninstalled.'), 'Modules status has been updated.');
@@ -123,7 +123,7 @@ function testUninstallPage() {
     $this->assertTitle(t('Uninstall') . ' | Drupal');
 
     // Make sure the correct error is shown when no modules are selected.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
     $this->assertText(t('No modules selected.'), 'No module is selected to uninstall');
   }
@@ -132,12 +132,12 @@ function testUninstallPage() {
    * Tests that a module which fails to install can still be uninstalled.
    */
   public function testFailedInstallStatus() {
-    $account = $this->drupalCreateUser(array('administer modules'));
+    $account = $this->drupalCreateUser(['administer modules']);
     $this->drupalLogin($account);
 
     $message = 'Exception thrown when installing module_installer_config_test with an invalid configuration file.';
     try {
-      $this->container->get('module_installer')->install(array('module_installer_config_test'));
+      $this->container->get('module_installer')->install(['module_installer_config_test']);
       $this->fail($message);
     }
     catch (EntityMalformedException $e) {
diff --git a/core/modules/system/tests/src/Functional/ParamConverter/UpcastingTest.php b/core/modules/system/tests/src/Functional/ParamConverter/UpcastingTest.php
index 52cd134156d27216ee36f1dff25fe47f38e9102c..faafe84600ace73c8f31d1d733a3a2dd9a77144a 100644
--- a/core/modules/system/tests/src/Functional/ParamConverter/UpcastingTest.php
+++ b/core/modules/system/tests/src/Functional/ParamConverter/UpcastingTest.php
@@ -12,7 +12,7 @@
  */
 class UpcastingTest extends BrowserTestBase {
 
-  public static $modules = array('paramconverter_test', 'node', 'language');
+  public static $modules = ['paramconverter_test', 'node', 'language'];
 
   /**
    * Confirms that all parameters are converted as expected.
@@ -25,8 +25,8 @@ class UpcastingTest extends BrowserTestBase {
    * happening.
    */
   public function testUpcasting() {
-    $node = $this->drupalCreateNode(array('title' => $this->randomMachineName(8)));
-    $user = $this->drupalCreateUser(array('access content'));
+    $node = $this->drupalCreateNode(['title' => $this->randomMachineName(8)]);
+    $user = $this->drupalCreateUser(['access content']);
     $foo = 'bar';
 
     // paramconverter_test/test_user_node_foo/{user}/{node}/{foo}
@@ -48,8 +48,8 @@ public function testUpcasting() {
    * Confirms we can upcast to controller arguments of the same type.
    */
   public function testSameTypes() {
-    $node = $this->drupalCreateNode(array('title' => $this->randomMachineName(8)));
-    $parent = $this->drupalCreateNode(array('title' => $this->randomMachineName(8)));
+    $node = $this->drupalCreateNode(['title' => $this->randomMachineName(8)]);
+    $parent = $this->drupalCreateNode(['title' => $this->randomMachineName(8)]);
     // paramconverter_test/node/{node}/set/parent/{parent}
     // options.parameters.parent.type = entity:node
     $this->drupalGet("paramconverter_test/node/" . $node->id() . "/set/parent/" . $parent->id());
@@ -63,19 +63,19 @@ public function testEntityLanguage() {
     $language = ConfigurableLanguage::createFromLangcode('de');
     $language->save();
     \Drupal::configFactory()->getEditable('language.negotiation')
-      ->set('url.prefixes', array('de' => 'de'))
+      ->set('url.prefixes', ['de' => 'de'])
       ->save();
 
     // The container must be recreated after adding a new language.
     $this->rebuildContainer();
 
-    $node = $this->drupalCreateNode(array('title' => 'English label'));
+    $node = $this->drupalCreateNode(['title' => 'English label']);
     $translation = $node->addTranslation('de');
     $translation->setTitle('Deutscher Titel')->save();
 
     $this->drupalGet("/paramconverter_test/node/" . $node->id() . "/test_language");
     $this->assertRaw("English label");
-    $this->drupalGet("paramconverter_test/node/" . $node->id() . "/test_language", array('language' => $language));
+    $this->drupalGet("paramconverter_test/node/" . $node->id() . "/test_language", ['language' => $language]);
     $this->assertRaw("Deutscher Titel");
   }
 
diff --git a/core/modules/system/tests/src/Functional/Path/UrlAlterFunctionalTest.php b/core/modules/system/tests/src/Functional/Path/UrlAlterFunctionalTest.php
index a24ddf934b4f036ce666f4b6fb0d355262f777f1..13c592d1b220daa6d99d2cbd24d4af730a19468d 100644
--- a/core/modules/system/tests/src/Functional/Path/UrlAlterFunctionalTest.php
+++ b/core/modules/system/tests/src/Functional/Path/UrlAlterFunctionalTest.php
@@ -19,7 +19,7 @@ class UrlAlterFunctionalTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('path', 'forum', 'url_alter_test');
+  public static $modules = ['path', 'forum', 'url_alter_test'];
 
   /**
    * Test that URL altering works and that it occurs in the correct order.
@@ -30,7 +30,7 @@ function testUrlAlter() {
 
     // User names can have quotes and plus signs so we should ensure that URL
     // altering works with this.
-    $account = $this->drupalCreateUser(array('administer url aliases'), "a'foo+bar");
+    $account = $this->drupalCreateUser(['administer url aliases'], "a'foo+bar");
     $this->drupalLogin($account);
 
     $uid = $account->id();
@@ -42,14 +42,14 @@ function testUrlAlter() {
     $this->assertUrlOutboundAlter("/user/$uid", "/user/$name");
 
     // Test that a path always uses its alias.
-    $path = array('source' => "/user/$uid/test1", 'alias' => '/alias/test1');
+    $path = ['source' => "/user/$uid/test1", 'alias' => '/alias/test1'];
     $this->container->get('path.alias_storage')->save($path['source'], $path['alias']);
     $this->rebuildContainer();
     $this->assertUrlInboundAlter('/alias/test1', "/user/$uid/test1");
     $this->assertUrlOutboundAlter("/user/$uid/test1", '/alias/test1');
 
     // Test adding an alias via the UI.
-    $edit = array('source' => "/user/$uid/edit", 'alias' => '/alias/test2');
+    $edit = ['source' => "/user/$uid/edit", 'alias' => '/alias/test2'];
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
     $this->assertText(t('The alias has been saved.'));
     $this->drupalGet('alias/test2');
@@ -95,7 +95,7 @@ function testUrlAlter() {
   protected function assertUrlOutboundAlter($original, $final) {
     // Test outbound altering.
     $result = $this->container->get('path_processor_manager')->processOutbound($original);
-    return $this->assertIdentical($result, $final, format_string('Altered outbound URL %original, expected %final, and got %result.', array('%original' => $original, '%final' => $final, '%result' => $result)));
+    return $this->assertIdentical($result, $final, format_string('Altered outbound URL %original, expected %final, and got %result.', ['%original' => $original, '%final' => $final, '%result' => $result]));
   }
 
   /**
@@ -112,7 +112,7 @@ protected function assertUrlOutboundAlter($original, $final) {
   protected function assertUrlInboundAlter($original, $final) {
     // Test inbound altering.
     $result = $this->container->get('path.alias_manager')->getPathByAlias($original);
-    return $this->assertIdentical($result, $final, format_string('Altered inbound URL %original, expected %final, and got %result.', array('%original' => $original, '%final' => $final, '%result' => $result)));
+    return $this->assertIdentical($result, $final, format_string('Altered inbound URL %original, expected %final, and got %result.', ['%original' => $original, '%final' => $final, '%result' => $result]));
   }
 
 }
diff --git a/core/modules/system/tests/src/Functional/Render/AjaxPageStateTest.php b/core/modules/system/tests/src/Functional/Render/AjaxPageStateTest.php
index 536fda9c8f4b7cd1c095615803331fd34aaf3740..6f5dc7da684a3db9684ea0f9401c78343db53222 100644
--- a/core/modules/system/tests/src/Functional/Render/AjaxPageStateTest.php
+++ b/core/modules/system/tests/src/Functional/Render/AjaxPageStateTest.php
@@ -43,7 +43,7 @@ protected function setUp() {
    * and available in code as scripts. Do this as the base test.
    */
   public function testLibrariesAvailable() {
-    $this->drupalGet('node', array());
+    $this->drupalGet('node', []);
     $this->assertRaw(
       '/core/assets/vendor/html5shiv/html5shiv.min.js',
       'The html5shiv library from core should be loaded.'
@@ -63,14 +63,14 @@ public function testLibrariesAvailable() {
    */
   public function testHtml5ShivIsNotLoaded() {
     $this->drupalGet('node',
-      array(
+      [
         "query" =>
-          array(
-            'ajax_page_state' => array(
+          [
+            'ajax_page_state' => [
               'libraries' => 'core/html5shiv'
-            )
-          )
-      )
+            ]
+          ]
+      ]
     );
     $this->assertNoRaw(
       '/core/assets/vendor/html5shiv/html5shiv.min.js',
diff --git a/core/modules/system/tests/src/Functional/Render/DisplayVariantTest.php b/core/modules/system/tests/src/Functional/Render/DisplayVariantTest.php
index 4eba3aa68151e089eedb2c3649406cee52b103f3..449046276e6105e85ec1241917ac3a6c42ee048a 100644
--- a/core/modules/system/tests/src/Functional/Render/DisplayVariantTest.php
+++ b/core/modules/system/tests/src/Functional/Render/DisplayVariantTest.php
@@ -16,7 +16,7 @@ class DisplayVariantTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('display_variant_test');
+  public static $modules = ['display_variant_test'];
 
   /**
    * Tests selecting the variant and passing configuration.
diff --git a/core/modules/system/tests/src/Functional/Routing/RouterPermissionTest.php b/core/modules/system/tests/src/Functional/Routing/RouterPermissionTest.php
index 5bc0bb50e5852883d977a6911d442f931261984f..62a511f2e438101d4f60109bc2f2e64c24fce4d7 100644
--- a/core/modules/system/tests/src/Functional/Routing/RouterPermissionTest.php
+++ b/core/modules/system/tests/src/Functional/Routing/RouterPermissionTest.php
@@ -16,7 +16,7 @@ class RouterPermissionTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('router_test');
+  public static $modules = ['router_test'];
 
   /**
    * Tests permission requirements on routes.
@@ -29,7 +29,7 @@ public function testPermissionAccess() {
     $this->drupalGet('router_test/test8');
     $this->assertResponse(403, 'Access denied by default if no access specified');
 
-    $user = $this->drupalCreateUser(array('access test7'));
+    $user = $this->drupalCreateUser(['access test7']);
     $this->drupalLogin($user);
     $this->drupalGet('router_test/test7');
     $this->assertResponse(200);
diff --git a/core/modules/system/tests/src/Functional/ServiceProvider/ServiceProviderWebTest.php b/core/modules/system/tests/src/Functional/ServiceProvider/ServiceProviderWebTest.php
index 88a3ce692e37f9ca20426199b1aab8f1bf273130..73d6910087dfcf4824fa5de0eb1da376d8f5ddb7 100644
--- a/core/modules/system/tests/src/Functional/ServiceProvider/ServiceProviderWebTest.php
+++ b/core/modules/system/tests/src/Functional/ServiceProvider/ServiceProviderWebTest.php
@@ -16,7 +16,7 @@ class ServiceProviderWebTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('file', 'service_provider_test');
+  public static $modules = ['file', 'service_provider_test'];
 
   /**
    * Tests that module service providers get registered to the DIC.
diff --git a/core/modules/system/tests/src/Functional/System/DateFormatsMachineNameTest.php b/core/modules/system/tests/src/Functional/System/DateFormatsMachineNameTest.php
index 29bb4c28671fa4b38296c48c34731a4969892824..7ff8af1fa4b84a8d27ba75966c1a8e9c00f77285 100644
--- a/core/modules/system/tests/src/Functional/System/DateFormatsMachineNameTest.php
+++ b/core/modules/system/tests/src/Functional/System/DateFormatsMachineNameTest.php
@@ -18,7 +18,7 @@ class DateFormatsMachineNameTest extends BrowserTestBase {
   protected function setUp() {
     parent::setUp();
     // Create a new administrator user for the test.
-    $admin = $this->drupalCreateUser(array('administer site configuration'));
+    $admin = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin);
   }
 
@@ -28,49 +28,49 @@ protected function setUp() {
   public function testDateFormatsMachineNameAllowedValues() {
     // Try to create a date format with a not allowed character to test the date
     // format specific machine name replace pattern.
-    $edit = array(
+    $edit = [
       'label' => 'Something Not Allowed',
       'id' => 'something.bad',
       'date_format_pattern' => 'Y-m-d',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertText(t('The machine-readable name must be unique, and can only contain lowercase letters, numbers, and underscores. Additionally, it can not be the reserved word "custom".'), 'It is not possible to create a date format with the machine name that has any character other than lowercase letters, digits or underscore.');
 
     // Try to create a date format with the reserved machine name "custom".
-    $edit = array(
+    $edit = [
       'label' => 'Custom',
       'id' => 'custom',
       'date_format_pattern' => 'Y-m-d',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertText(t('The machine-readable name must be unique, and can only contain lowercase letters, numbers, and underscores. Additionally, it can not be the reserved word "custom".'), 'It is not possible to create a date format with the machine name "custom".');
 
     // Try to create a date format with a machine name, "fallback", that
     // already exists.
-    $edit = array(
+    $edit = [
       'label' => 'Fallback',
       'id' => 'fallback',
       'date_format_pattern' => 'j/m/Y',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertText(t('The machine-readable name is already in use. It must be unique.'), 'It is not possible to create a date format with the machine name "fallback". It is a built-in format that already exists.');
 
     // Create a date format with a machine name distinct from the previous two.
     $id = Unicode::strtolower($this->randomMachineName(16));
-    $edit = array(
+    $edit = [
       'label' => $this->randomMachineName(16),
       'id' => $id,
       'date_format_pattern' => 'd/m/Y',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertText(t('Custom date format added.'), 'It is possible to create a date format with a new machine name.');
 
     // Try to create a date format with same machine name as the previous one.
-    $edit = array(
+    $edit = [
       'label' => $this->randomMachineName(16),
       'id' => $id,
       'date_format_pattern' => 'd-m-Y',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertText(t('The machine-readable name is already in use. It must be unique.'), 'It is not possible to create a new date format with an existing machine name.');
   }
diff --git a/core/modules/system/tests/src/Functional/System/DateTimeTest.php b/core/modules/system/tests/src/Functional/System/DateTimeTest.php
index 98dd35e5818b81a1757892ccd494a37fd9d25fbe..1f3f9779f089a2a37af93d9f0a62b82d440fcd0d 100644
--- a/core/modules/system/tests/src/Functional/System/DateTimeTest.php
+++ b/core/modules/system/tests/src/Functional/System/DateTimeTest.php
@@ -25,14 +25,14 @@ protected function setUp() {
     parent::setUp();
 
     // Create admin user and log in admin user.
-    $this->drupalLogin ($this->drupalCreateUser(array(
+    $this->drupalLogin ($this->drupalCreateUser([
       'administer site configuration',
       'administer content types',
       'administer nodes',
       'administer node fields',
       'administer node form display',
       'administer node display',
-    )));
+    ]));
     $this->drupalPlaceBlock('local_actions_block');
   }
 
@@ -52,9 +52,9 @@ function testTimeZoneHandling() {
     // Create some nodes with different authored-on dates.
     $date1 = '2007-01-31 21:00:00 -1000';
     $date2 = '2007-07-31 21:00:00 -1000';
-    $this->drupalCreateContentType(array('type' => 'article'));
-    $node1 = $this->drupalCreateNode(array('created' => strtotime($date1), 'type' => 'article'));
-    $node2 = $this->drupalCreateNode(array('created' => strtotime($date2), 'type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
+    $node1 = $this->drupalCreateNode(['created' => strtotime($date1), 'type' => 'article']);
+    $node2 = $this->drupalCreateNode(['created' => strtotime($date2), 'type' => 'article']);
 
     // Confirm date format and time zone.
     $this->drupalGet('node/' . $node1->id());
@@ -64,7 +64,7 @@ function testTimeZoneHandling() {
 
     // Set time zone to Los Angeles time.
     $config->set('timezone.default', 'America/Los_Angeles')->save();
-    \Drupal::entityManager()->getViewBuilder('node')->resetCache(array($node1, $node2));
+    \Drupal::entityManager()->getViewBuilder('node')->resetCache([$node1, $node2]);
 
     // Confirm date format and time zone.
     $this->drupalGet('node/' . $node1->id());
@@ -85,11 +85,11 @@ function testDateFormatConfiguration() {
     $date_format_id = strtolower($this->randomMachineName(8));
     $name = ucwords($date_format_id);
     $date_format = 'd.m.Y - H:i';
-    $edit = array(
+    $edit = [
       'id' => $date_format_id,
       'label' => $name,
       'date_format_pattern' => $date_format,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertUrl(\Drupal::url('entity.date_format.collection', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
     $this->assertText(t('Custom date format added.'), 'Date format added confirmation message appears.');
@@ -100,24 +100,24 @@ function testDateFormatConfiguration() {
     $this->drupalGet('admin/config/regional/date-time');
     $this->clickLink(t('Edit'));
     $this->drupalPostForm(NULL, NULL, t('Save format'));
-    $this->assertUrl('admin/config/regional/date-time', array('absolute' => TRUE), 'Correct page redirection.');
+    $this->assertUrl('admin/config/regional/date-time', ['absolute' => TRUE], 'Correct page redirection.');
     $this->assertText(t('Custom date format updated.'), 'Custom date format successfully updated.');
 
     // Edit custom date format.
     $this->drupalGet('admin/config/regional/date-time');
     $this->clickLink(t('Edit'));
-    $edit = array(
+    $edit = [
       'date_format_pattern' => 'Y m',
-    );
+    ];
     $this->drupalPostForm($this->getUrl(), $edit, t('Save format'));
     $this->assertUrl(\Drupal::url('entity.date_format.collection', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
     $this->assertText(t('Custom date format updated.'), 'Custom date format successfully updated.');
 
     // Delete custom date format.
     $this->clickLink(t('Delete'));
-    $this->drupalPostForm('admin/config/regional/date-time/formats/manage/' . $date_format_id . '/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/config/regional/date-time/formats/manage/' . $date_format_id . '/delete', [], t('Delete'));
     $this->assertUrl(\Drupal::url('entity.date_format.collection', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
-    $this->assertRaw(t('The date format %format has been deleted.', array('%format' => $name)), 'Custom date format removed.');
+    $this->assertRaw(t('The date format %format has been deleted.', ['%format' => $name]), 'Custom date format removed.');
 
     // Make sure the date does not exist in config.
     $date_format = DateFormat::load($date_format_id);
@@ -127,22 +127,22 @@ function testDateFormatConfiguration() {
     $date_format_id = strtolower($this->randomMachineName(8));
     $name = ucwords($date_format_id);
     $date_format = 'Y';
-    $edit = array(
+    $edit = [
       'id' => $date_format_id,
       'label' => $name,
       'date_format_pattern' => $date_format,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertUrl(\Drupal::url('entity.date_format.collection', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
     $this->assertText(t('Custom date format added.'), 'Date format added confirmation message appears.');
     $this->assertText($name, 'Custom date format appears in the date format list.');
     $this->assertText(t('Delete'), 'Delete link for custom date format appears.');
 
-    $date_format = DateFormat::create(array(
+    $date_format = DateFormat::create([
       'id' => 'xss_short',
       'label' => 'XSS format',
       'pattern' => '\<\s\c\r\i\p\t\>\a\l\e\r\t\(\'\X\S\S\'\)\;\<\/\s\c\r\i\p\t\>',
-      ));
+      ]);
     $date_format->save();
 
     $this->drupalGet(Url::fromRoute('entity.date_format.collection'));
@@ -152,11 +152,11 @@ function testDateFormatConfiguration() {
     $date_format_id = strtolower($this->randomMachineName(8));
     $name = ucwords($date_format_id);
     $date_format = '& \<\e\m\>Y\<\/\e\m\>';
-    $edit = array(
+    $edit = [
       'id' => $date_format_id,
       'label' => $name,
       'date_format_pattern' => $date_format,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/date-time/formats/add', $edit, t('Add format'));
     $this->assertUrl(\Drupal::url('entity.date_format.collection', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
     $this->assertText(t('Custom date format added.'), 'Date format added confirmation message appears.');
@@ -169,51 +169,51 @@ function testDateFormatConfiguration() {
    */
   function testEnteringDateTimeViaSelectors() {
 
-    $this->drupalCreateContentType(array('type' => 'page_with_date', 'name' => 'Page with date'));
+    $this->drupalCreateContentType(['type' => 'page_with_date', 'name' => 'Page with date']);
 
     $this->drupalGet('admin/structure/types/manage/page_with_date');
     $this->assertResponse(200, 'Content type created.');
 
     $this->drupalGet('admin/structure/types/manage/page_with_date/fields/add-field');
-    $edit = array(
+    $edit = [
       'new_storage_type' => 'datetime',
       'label' => 'dt',
       'field_name' => 'dt',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page_with_date/fields/add-field', $edit, t('Save and continue'));
     $this->assertText(t('These settings apply to the'), 'New datetime field created, now configuring');
 
     $this->drupalGet('admin/structure/types/manage/page_with_date/fields/node.page_with_date.field_dt/storage');
-    $edit = array(
+    $edit = [
       'settings[datetime_type]' => 'datetime',
       'cardinality' => 'number',
       'cardinality_number' => '1',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page_with_date/fields/node.page_with_date.field_dt/storage', $edit, t('Save field settings'));
 
     $this->drupalGet('admin/structure/types/manage/page_with_date/fields');
     $this->assertText('field_dt', 'New field is in place');
 
     $this->drupalGet('admin/structure/types/manage/page_with_date/form-display');
-    $edit = array(
+    $edit = [
       'fields[field_dt][type]' => 'datetime_datelist',
       'fields[field_dt][region]' => 'content',
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/page_with_date/form-display', $edit, t('Save'));
     $this->drupalLogout();
 
     // Now log in as a regular editor.
-    $this->drupalLogin($this->drupalCreateUser(array('create page_with_date content')));
+    $this->drupalLogin($this->drupalCreateUser(['create page_with_date content']));
 
     $this->drupalGet('node/add/page_with_date');
-    $edit = array(
+    $edit = [
       'title[0][value]' => 'sample doc',
       'field_dt[0][value][year]' => '2016',
       'field_dt[0][value][month]' => '2',
       'field_dt[0][value][day]' => '31',
       'field_dt[0][value][hour]' => '1',
       'field_dt[0][value][minute]' => '30',
-    );
+    ];
     $this->drupalPostForm('node/add/page_with_date', $edit, t('Save'));
     $this->assertText(t('Selected combination of day and month is not valid.'), 'Inorrect date failed validation');
 
diff --git a/core/modules/system/tests/src/Functional/System/IndexPhpTest.php b/core/modules/system/tests/src/Functional/System/IndexPhpTest.php
index fa43ad2835038a8049e892498ad8599e2377f078..36cdb7b916530a56eb7323461048169198ceab40 100644
--- a/core/modules/system/tests/src/Functional/System/IndexPhpTest.php
+++ b/core/modules/system/tests/src/Functional/System/IndexPhpTest.php
@@ -20,10 +20,10 @@ protected function setUp() {
   function testIndexPhpHandling() {
     $index_php = $GLOBALS['base_url'] . '/index.php';
 
-    $this->drupalGet($index_php, array('external' => TRUE));
+    $this->drupalGet($index_php, ['external' => TRUE]);
     $this->assertResponse(200, 'Make sure index.php returns a valid page.');
 
-    $this->drupalGet($index_php . '/user', array('external' => TRUE));
+    $this->drupalGet($index_php . '/user', ['external' => TRUE]);
     $this->assertResponse(200, 'Make sure index.php/user returns a valid page.');
   }
 
diff --git a/core/modules/system/tests/src/Functional/System/MainContentFallbackTest.php b/core/modules/system/tests/src/Functional/System/MainContentFallbackTest.php
index 8d64feb9911e102d0998525e1336e2ded29379b4..f953e09853a760c32c4215accd58f6e807d4f66e 100644
--- a/core/modules/system/tests/src/Functional/System/MainContentFallbackTest.php
+++ b/core/modules/system/tests/src/Functional/System/MainContentFallbackTest.php
@@ -16,7 +16,7 @@ class MainContentFallbackTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'system_test');
+  public static $modules = ['block', 'system_test'];
 
   protected $adminUser;
   protected $webUser;
@@ -25,22 +25,22 @@ protected function setUp() {
     parent::setUp();
 
     // Create and log in admin user.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'access administration pages',
       'administer site configuration',
       'administer modules',
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
 
     // Create a web user.
-    $this->webUser = $this->drupalCreateUser(array('access user profiles'));
+    $this->webUser = $this->drupalCreateUser(['access user profiles']);
   }
 
   /**
    * Test availability of main content: Drupal falls back to SimplePageVariant.
    */
   function testMainContentFallback() {
-    $edit = array();
+    $edit = [];
     // Uninstall the block module.
     $edit['uninstall[block]'] = 'block';
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
@@ -63,7 +63,7 @@ function testMainContentFallback() {
 
     // Enable the block module again.
     $this->drupalLogin($this->adminUser);
-    $edit = array();
+    $edit = [];
     $edit['modules[block][enable]'] = 'block';
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
     $this->assertText(t('Module Block has been enabled.'), 'Modules status has been updated.');
diff --git a/core/modules/system/tests/src/Functional/System/SitesDirectoryHardeningTest.php b/core/modules/system/tests/src/Functional/System/SitesDirectoryHardeningTest.php
index 6a4d3ee9c272e907f8ff6530d3af3464074dcc71..fbe97f4dab8df94465e63c1a5d3c6cab2f06f494 100644
--- a/core/modules/system/tests/src/Functional/System/SitesDirectoryHardeningTest.php
+++ b/core/modules/system/tests/src/Functional/System/SitesDirectoryHardeningTest.php
@@ -25,17 +25,17 @@ public function testSitesDirectoryHardening() {
     $settings_file = $this->settingsFile($site_path);
 
     // First, we check based on what the initial install has set.
-    $this->assertTrue(drupal_verify_install_file($site_path, FILE_NOT_WRITABLE, 'dir'), new FormattableMarkup('Verified permissions for @file.', array('@file' => $site_path)));
+    $this->assertTrue(drupal_verify_install_file($site_path, FILE_NOT_WRITABLE, 'dir'), new FormattableMarkup('Verified permissions for @file.', ['@file' => $site_path]));
 
     // We intentionally don't check for settings.local.php as that file is
     // not created by Drupal.
-    $this->assertTrue(drupal_verify_install_file($settings_file, FILE_EXIST | FILE_READABLE | FILE_NOT_WRITABLE), new FormattableMarkup('Verified permissions for @file.', array('@file' => $settings_file)));
+    $this->assertTrue(drupal_verify_install_file($settings_file, FILE_EXIST | FILE_READABLE | FILE_NOT_WRITABLE), new FormattableMarkup('Verified permissions for @file.', ['@file' => $settings_file]));
 
     $this->makeWritable($site_path);
     $this->checkSystemRequirements();
 
-    $this->assertTrue(drupal_verify_install_file($site_path, FILE_NOT_WRITABLE, 'dir'), new FormattableMarkup('Verified permissions for @file after manual permissions change.', array('@file' => $site_path)));
-    $this->assertTrue(drupal_verify_install_file($settings_file, FILE_EXIST | FILE_READABLE | FILE_NOT_WRITABLE), new FormattableMarkup('Verified permissions for @file after manual permissions change.', array('@file' => $settings_file)));
+    $this->assertTrue(drupal_verify_install_file($site_path, FILE_NOT_WRITABLE, 'dir'), new FormattableMarkup('Verified permissions for @file after manual permissions change.', ['@file' => $site_path]));
+    $this->assertTrue(drupal_verify_install_file($settings_file, FILE_EXIST | FILE_READABLE | FILE_NOT_WRITABLE), new FormattableMarkup('Verified permissions for @file after manual permissions change.', ['@file' => $settings_file]));
   }
 
   /**
diff --git a/core/modules/system/tests/src/Functional/System/StatusTest.php b/core/modules/system/tests/src/Functional/System/StatusTest.php
index 34d4f758ba00ddef94ecacd965116650eaed8067..cb81d0521f878163729d76b1986f975118522644 100644
--- a/core/modules/system/tests/src/Functional/System/StatusTest.php
+++ b/core/modules/system/tests/src/Functional/System/StatusTest.php
@@ -26,17 +26,17 @@ protected function setUp() {
 
     // Unset the sync directory in settings.php to trigger $config_directories
     // error.
-    $settings['config_directories']  = array(
-      CONFIG_SYNC_DIRECTORY => (object) array(
+    $settings['config_directories']  = [
+      CONFIG_SYNC_DIRECTORY => (object) [
         'value' => '',
         'required' => TRUE,
-      ),
-    );
+      ],
+    ];
     $this->writeSettings($settings);
 
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'administer site configuration',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
   }
 
@@ -71,7 +71,7 @@ public function testStatusPage() {
     $this->assertNoText(t('Out of date'));
 
     // The global $config_directories is not properly formed.
-    $this->assertRaw(t('Your %file file must define the $config_directories variable as an array containing the names of directories in which configuration files can be found. It must contain a %sync_key key.', array('%file' => $this->siteDirectory . '/settings.php', '%sync_key' => CONFIG_SYNC_DIRECTORY)));
+    $this->assertRaw(t('Your %file file must define the $config_directories variable as an array containing the names of directories in which configuration files can be found. It must contain a %sync_key key.', ['%file' => $this->siteDirectory . '/settings.php', '%sync_key' => CONFIG_SYNC_DIRECTORY]));
 
     // Set the schema version of update_test_postupdate to a lower version, so
     // update_test_postupdate_update_8001() needs to be executed.
diff --git a/core/modules/system/tests/src/Functional/System/SystemAuthorizeTest.php b/core/modules/system/tests/src/Functional/System/SystemAuthorizeTest.php
index 6878d6c73bdfa638572427c134697baf466d9af1..01984a358153557626df763b41ed93896cc28332 100644
--- a/core/modules/system/tests/src/Functional/System/SystemAuthorizeTest.php
+++ b/core/modules/system/tests/src/Functional/System/SystemAuthorizeTest.php
@@ -16,13 +16,13 @@ class SystemAuthorizeTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('system_test');
+  public static $modules = ['system_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create an administrator user.
-    $this->drupalLogin ($this->drupalCreateUser(array('administer software updates')));
+    $this->drupalLogin ($this->drupalCreateUser(['administer software updates']));
   }
 
   /**
@@ -46,7 +46,7 @@ function drupalGetAuthorizePHP($page_title = 'system-test-auth') {
   function testFileTransferHooks() {
     $page_title = $this->randomMachineName(16);
     $this->drupalGetAuthorizePHP($page_title);
-    $this->assertTitle(strtr('@title | Drupal', array('@title' => $page_title)), 'authorize.php page title is correct.');
+    $this->assertTitle(strtr('@title | Drupal', ['@title' => $page_title]), 'authorize.php page title is correct.');
     $this->assertNoText('It appears you have reached this page in error.');
     $this->assertText('To continue, provide your server connection details');
     // Make sure we see the new connection method added by system_test.
diff --git a/core/modules/system/tests/src/Functional/System/TrustedHostsTest.php b/core/modules/system/tests/src/Functional/System/TrustedHostsTest.php
index ade5e2b738da9b298f58ffe9ea85ed86a825ffaa..7a65474c7f5ca92881c1198ce9a5439fbdb13c60 100644
--- a/core/modules/system/tests/src/Functional/System/TrustedHostsTest.php
+++ b/core/modules/system/tests/src/Functional/System/TrustedHostsTest.php
@@ -17,9 +17,9 @@ class TrustedHostsTest extends BrowserTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $admin_user = $this->drupalCreateUser(array(
+    $admin_user = $this->drupalCreateUser([
       'administer site configuration',
-    ));
+    ]);
     $this->drupalLogin($admin_user);
   }
 
@@ -39,10 +39,10 @@ public function testStatusPageWithoutConfiguration() {
    * Tests that the status page shows the trusted patterns from settings.php.
    */
   public function testStatusPageWithConfiguration() {
-    $settings['settings']['trusted_host_patterns'] = (object) array(
-      'value' => array('^' . preg_quote(\Drupal::request()->getHost()) . '$'),
+    $settings['settings']['trusted_host_patterns'] = (object) [
+      'value' => ['^' . preg_quote(\Drupal::request()->getHost()) . '$'],
       'required' => TRUE,
-    );
+    ];
 
     $this->writeSettings($settings);
 
@@ -63,10 +63,10 @@ public function testFakeRequests() {
     $this->container->get('router.builder')->rebuild();
 
     $host = $this->container->get('request_stack')->getCurrentRequest()->getHost();
-    $settings['settings']['trusted_host_patterns'] = (object) array(
-      'value' => array('^' . preg_quote($host) . '$'),
+    $settings['settings']['trusted_host_patterns'] = (object) [
+      'value' => ['^' . preg_quote($host) . '$'],
       'required' => TRUE,
-    );
+    ];
 
     $this->writeSettings($settings);
 
diff --git a/core/modules/system/tests/src/Functional/Theme/EngineNyanCatTest.php b/core/modules/system/tests/src/Functional/Theme/EngineNyanCatTest.php
index 2d279d5be1a3fe6b9f2f8936055093173b34f73f..6af03954817064bc681313da61eebebea112d680 100644
--- a/core/modules/system/tests/src/Functional/Theme/EngineNyanCatTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/EngineNyanCatTest.php
@@ -16,11 +16,11 @@ class EngineNyanCatTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test');
+  public static $modules = ['theme_test'];
 
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('test_theme_nyan_cat_engine'));
+    \Drupal::service('theme_handler')->install(['test_theme_nyan_cat_engine']);
   }
 
   /**
diff --git a/core/modules/system/tests/src/Functional/Theme/FastTest.php b/core/modules/system/tests/src/Functional/Theme/FastTest.php
index 198fd63b4dcc484153fc1e0d403e01ceb785c451..66426ee113f74b45572774e2fbc000bed81107bc 100644
--- a/core/modules/system/tests/src/Functional/Theme/FastTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/FastTest.php
@@ -16,11 +16,11 @@ class FastTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test');
+  public static $modules = ['theme_test'];
 
   protected function setUp() {
     parent::setUp();
-    $this->account = $this->drupalCreateUser(array('access user profiles'));
+    $this->account = $this->drupalCreateUser(['access user profiles']);
   }
 
   /**
@@ -28,7 +28,7 @@ protected function setUp() {
    */
   function testUserAutocomplete() {
     $this->drupalLogin($this->account);
-    $this->drupalGet('user/autocomplete', array('query' => array('q' => $this->account->getUsername())));
+    $this->drupalGet('user/autocomplete', ['query' => ['q' => $this->account->getUsername()]]);
     $this->assertRaw($this->account->getUsername());
     $this->assertNoText('registry initialized', 'The registry was not initialized');
   }
diff --git a/core/modules/system/tests/src/Functional/Theme/ThemeEarlyInitializationTest.php b/core/modules/system/tests/src/Functional/Theme/ThemeEarlyInitializationTest.php
index 89424bd201d4deed828229a42b933b50bc09530c..f899effaa950ae26911d99fe85cafe333a77cb89 100644
--- a/core/modules/system/tests/src/Functional/Theme/ThemeEarlyInitializationTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/ThemeEarlyInitializationTest.php
@@ -17,7 +17,7 @@ class ThemeEarlyInitializationTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test');
+  public static $modules = ['theme_test'];
 
   /**
    * Test that the theme system can generate output in a request listener.
diff --git a/core/modules/system/tests/src/Functional/Theme/ThemeInfoTest.php b/core/modules/system/tests/src/Functional/Theme/ThemeInfoTest.php
index 7f59aa238b6bb140a873a78502f02b181e46f12f..d81b6d7e301f5e71209b8d1fd113735397ef3963 100644
--- a/core/modules/system/tests/src/Functional/Theme/ThemeInfoTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/ThemeInfoTest.php
@@ -16,7 +16,7 @@ class ThemeInfoTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test');
+  public static $modules = ['theme_test'];
 
   /**
    * The theme handler used in this test for enabling themes.
@@ -54,7 +54,7 @@ protected function setUp() {
    * Tests stylesheets-remove.
    */
   function testStylesheets() {
-    $this->themeHandler->install(array('test_basetheme', 'test_subtheme'));
+    $this->themeHandler->install(['test_basetheme', 'test_subtheme']);
     $this->config('system.theme')
       ->set('default', 'test_subtheme')
       ->save();
@@ -66,16 +66,16 @@ function testStylesheets() {
     // should work nevertheless.
     $this->drupalGet('theme-test/info/stylesheets');
 
-    $this->assertIdentical(1, count($this->xpath('//link[contains(@href, :href)]', array(':href'  => "$base/base-add.css"))), "$base/base-add.css found");
-    $this->assertIdentical(0, count($this->xpath('//link[contains(@href, :href)]', array(':href'  => "base-remove.css"))), "base-remove.css not found");
+    $this->assertIdentical(1, count($this->xpath('//link[contains(@href, :href)]', [':href'  => "$base/base-add.css"])), "$base/base-add.css found");
+    $this->assertIdentical(0, count($this->xpath('//link[contains(@href, :href)]', [':href'  => "base-remove.css"])), "base-remove.css not found");
 
-    $this->assertIdentical(1, count($this->xpath('//link[contains(@href, :href)]', array(':href'  => "$sub/sub-add.css"))), "$sub/sub-add.css found");
-    $this->assertIdentical(0, count($this->xpath('//link[contains(@href, :href)]', array(':href'  => "sub-remove.css"))), "sub-remove.css not found");
-    $this->assertIdentical(0, count($this->xpath('//link[contains(@href, :href)]', array(':href' => "base-add.sub-remove.css"))), "base-add.sub-remove.css not found");
+    $this->assertIdentical(1, count($this->xpath('//link[contains(@href, :href)]', [':href'  => "$sub/sub-add.css"])), "$sub/sub-add.css found");
+    $this->assertIdentical(0, count($this->xpath('//link[contains(@href, :href)]', [':href'  => "sub-remove.css"])), "sub-remove.css not found");
+    $this->assertIdentical(0, count($this->xpath('//link[contains(@href, :href)]', [':href' => "base-add.sub-remove.css"])), "base-add.sub-remove.css not found");
 
     // Verify that CSS files with the same name are loaded from both the base theme and subtheme.
-    $this->assertIdentical(1, count($this->xpath('//link[contains(@href, :href)]', array(':href' => "$base/samename.css"))), "$base/samename.css found");
-    $this->assertIdentical(1, count($this->xpath('//link[contains(@href, :href)]', array(':href' => "$sub/samename.css"))), "$sub/samename.css found");
+    $this->assertIdentical(1, count($this->xpath('//link[contains(@href, :href)]', [':href' => "$base/samename.css"])), "$base/samename.css found");
+    $this->assertIdentical(1, count($this->xpath('//link[contains(@href, :href)]', [':href' => "$sub/samename.css"])), "$sub/samename.css found");
 
   }
 
@@ -83,7 +83,7 @@ function testStylesheets() {
    * Tests that changes to the info file are picked up.
    */
   public function testChanges() {
-    $this->themeHandler->install(array('test_theme'));
+    $this->themeHandler->install(['test_theme']);
     $this->config('system.theme')->set('default', 'test_theme')->save();
     $this->themeManager->resetActiveTheme();
 
diff --git a/core/modules/system/tests/src/Functional/Theme/TwigExtensionTest.php b/core/modules/system/tests/src/Functional/Theme/TwigExtensionTest.php
index 36bfe2de0810d77d9c03933b7577ccf36aba883c..f2491ac47aa93e7eea4dc4c0d0edbd2181610b53 100644
--- a/core/modules/system/tests/src/Functional/Theme/TwigExtensionTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/TwigExtensionTest.php
@@ -16,11 +16,11 @@ class TwigExtensionTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test', 'twig_extension_test');
+  public static $modules = ['theme_test', 'twig_extension_test'];
 
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
   }
 
   /**
diff --git a/core/modules/system/tests/src/Functional/Theme/TwigLoaderTest.php b/core/modules/system/tests/src/Functional/Theme/TwigLoaderTest.php
index b580719837dde0630c05e901d7148e14be867f60..d2b0b5465d2de5cba354f672aa04e0c260d857b7 100644
--- a/core/modules/system/tests/src/Functional/Theme/TwigLoaderTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/TwigLoaderTest.php
@@ -25,10 +25,10 @@ public function testTwigLoaderAddition() {
     $environment = \Drupal::service('twig');
 
     $template = $environment->loadTemplate('kittens');
-    $this->assertEqual($template->render(array()), 'kittens', 'Passing "kittens" to the custom Twig loader returns "kittens".');
+    $this->assertEqual($template->render([]), 'kittens', 'Passing "kittens" to the custom Twig loader returns "kittens".');
 
     $template = $environment->loadTemplate('meow');
-    $this->assertEqual($template->render(array()), 'cats', 'Passing something other than "kittens" to the custom Twig loader returns "cats".');
+    $this->assertEqual($template->render([]), 'cats', 'Passing something other than "kittens" to the custom Twig loader returns "cats".');
   }
 
 }
diff --git a/core/modules/system/tests/src/Functional/Theme/TwigRegistryLoaderTest.php b/core/modules/system/tests/src/Functional/Theme/TwigRegistryLoaderTest.php
index a0161b11fddc575fd6fc13c44bcbe06878e8dbb7..2446289984eb5be96bbf13c0f595ac82595c3b9e 100644
--- a/core/modules/system/tests/src/Functional/Theme/TwigRegistryLoaderTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/TwigRegistryLoaderTest.php
@@ -16,7 +16,7 @@ class TwigRegistryLoaderTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('twig_theme_test', 'block');
+  public static $modules = ['twig_theme_test', 'block'];
 
   /**
    * @var \Drupal\Core\Template\TwigEnvironment
@@ -25,7 +25,7 @@ class TwigRegistryLoaderTest extends BrowserTestBase {
 
   protected function setUp() {
     parent::setUp();
-    \Drupal::service('theme_handler')->install(array('test_theme_twig_registry_loader', 'test_theme_twig_registry_loader_theme', 'test_theme_twig_registry_loader_subtheme'));
+    \Drupal::service('theme_handler')->install(['test_theme_twig_registry_loader', 'test_theme_twig_registry_loader_theme', 'test_theme_twig_registry_loader_subtheme']);
     $this->twig = \Drupal::service('twig');
   }
 
diff --git a/core/modules/system/tests/src/Functional/Theme/TwigSettingsTest.php b/core/modules/system/tests/src/Functional/Theme/TwigSettingsTest.php
index 2dbeed18331d48f7f64cf772f0754b19a91a604b..58dcbc9af1b4885e2c71da3e6be31a03dba920d8 100644
--- a/core/modules/system/tests/src/Functional/Theme/TwigSettingsTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/TwigSettingsTest.php
@@ -17,7 +17,7 @@ class TwigSettingsTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test');
+  public static $modules = ['theme_test'];
 
   /**
    * Ensures Twig template auto reload setting can be overridden.
@@ -77,7 +77,7 @@ function testTwigDebugOverride() {
   function testTwigCacheOverride() {
     $extension = twig_extension();
     $theme_handler = $this->container->get('theme_handler');
-    $theme_handler->install(array('test_theme'));
+    $theme_handler->install(['test_theme']);
     $this->config('system.theme')->set('default', 'test_theme')->save();
 
     // The registry still works on theme globals, so set them here.
diff --git a/core/modules/system/tests/src/Kernel/Action/ActionTest.php b/core/modules/system/tests/src/Kernel/Action/ActionTest.php
index 4ca24fb5ac3f9cf4ce92b3a87e6f547dd69f104e..6c381d7c80f73bbd3310aff9edd57e625a8411c1 100644
--- a/core/modules/system/tests/src/Kernel/Action/ActionTest.php
+++ b/core/modules/system/tests/src/Kernel/Action/ActionTest.php
@@ -17,7 +17,7 @@ class ActionTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('system', 'field', 'user', 'action_test');
+  public static $modules = ['system', 'field', 'user', 'action_test'];
 
   /**
    * The action manager.
@@ -34,7 +34,7 @@ protected function setUp() {
 
     $this->actionManager = $this->container->get('plugin.manager.action');
     $this->installEntitySchema('user');
-    $this->installSchema('system', array('sequences'));
+    $this->installSchema('system', ['sequences']);
   }
 
   /**
@@ -59,7 +59,7 @@ public function testOperations() {
     // Create a new unsaved user.
     $name = $this->randomMachineName();
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
-    $account = $user_storage->create(array('name' => $name, 'bundle' => 'user'));
+    $account = $user_storage->create(['name' => $name, 'bundle' => 'user']);
     $loaded_accounts = $user_storage->loadMultiple();
     $this->assertEqual(count($loaded_accounts), 0);
 
@@ -76,25 +76,25 @@ public function testOperations() {
    */
   public function testDependencies() {
     // Create a new action that depends on a user role.
-    $action = Action::create(array(
+    $action = Action::create([
       'id' => 'user_add_role_action.' . RoleInterface::ANONYMOUS_ID,
       'type' => 'user',
       'label' => t('Add the anonymous role to the selected users'),
-      'configuration' => array(
+      'configuration' => [
         'rid' => RoleInterface::ANONYMOUS_ID,
-      ),
+      ],
       'plugin' => 'user_add_role_action',
-    ));
+    ]);
     $action->save();
 
-    $expected = array(
-      'config' => array(
+    $expected = [
+      'config' => [
         'user.role.' . RoleInterface::ANONYMOUS_ID,
-      ),
-      'module' => array(
+      ],
+      'module' => [
         'user',
-      ),
-    );
+      ],
+    ];
     $this->assertIdentical($expected, $action->calculateDependencies()->getDependencies());
   }
 
diff --git a/core/modules/system/tests/src/Kernel/Block/SystemMenuBlockTest.php b/core/modules/system/tests/src/Kernel/Block/SystemMenuBlockTest.php
index ca1c5afff4ed7fc95c54f23b2b39a2884b253a2c..6a9825e1208f2b1dde2f93e44bb9214e19a61227 100644
--- a/core/modules/system/tests/src/Kernel/Block/SystemMenuBlockTest.php
+++ b/core/modules/system/tests/src/Kernel/Block/SystemMenuBlockTest.php
@@ -31,7 +31,7 @@ class SystemMenuBlockTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'system',
     'block',
     'menu_test',
@@ -39,7 +39,7 @@ class SystemMenuBlockTest extends KernelTestBase {
     'field',
     'user',
     'link',
-  );
+  ];
 
   /**
    * The block under test.
@@ -97,16 +97,16 @@ protected function setUp() {
     $this->blockManager = $this->container->get('plugin.manager.block');
 
     $routes = new RouteCollection();
-    $requirements = array('_access' => 'TRUE');
-    $options = array('_access_checks' => array('access_check.default'));
-    $routes->add('example1', new Route('/example1', array(), $requirements, $options));
-    $routes->add('example2', new Route('/example2', array(), $requirements, $options));
-    $routes->add('example3', new Route('/example3', array(), $requirements, $options));
-    $routes->add('example4', new Route('/example4', array(), $requirements, $options));
-    $routes->add('example5', new Route('/example5', array(), $requirements, $options));
-    $routes->add('example6', new Route('/example6', array(), $requirements, $options));
-    $routes->add('example7', new Route('/example7', array(), $requirements, $options));
-    $routes->add('example8', new Route('/example8', array(), $requirements, $options));
+    $requirements = ['_access' => 'TRUE'];
+    $options = ['_access_checks' => ['access_check.default']];
+    $routes->add('example1', new Route('/example1', [], $requirements, $options));
+    $routes->add('example2', new Route('/example2', [], $requirements, $options));
+    $routes->add('example3', new Route('/example3', [], $requirements, $options));
+    $routes->add('example4', new Route('/example4', [], $requirements, $options));
+    $routes->add('example5', new Route('/example5', [], $requirements, $options));
+    $routes->add('example6', new Route('/example6', [], $requirements, $options));
+    $routes->add('example7', new Route('/example7', [], $requirements, $options));
+    $routes->add('example8', new Route('/example8', [], $requirements, $options));
 
     $mock_route_provider = new MockRouteProvider($routes);
     $this->container->set('router.route_provider', $mock_route_provider);
@@ -115,11 +115,11 @@ protected function setUp() {
     $menu_name = 'mock';
     $label = $this->randomMachineName(16);
 
-    $this->menu = Menu::create(array(
+    $this->menu = Menu::create([
       'id' => $menu_name,
       'label' => $label,
       'description' => 'Description text',
-    ));
+    ]);
     $this->menu->save();
 
     // This creates a tree with the following structure:
@@ -132,16 +132,16 @@ protected function setUp() {
     // - 6
     // - 8
     // With link 6 being the only external link.
-    $links = array(
-      1 => MenuLinkMock::create(array('id' => 'test.example1', 'route_name' => 'example1', 'title' => 'foo', 'parent' => '', 'weight' => 0)),
-      2 => MenuLinkMock::create(array('id' => 'test.example2', 'route_name' => 'example2', 'title' => 'bar', 'parent' => '', 'route_parameters' => array('foo' => 'bar'), 'weight' => 1)),
-      3 => MenuLinkMock::create(array('id' => 'test.example3', 'route_name' => 'example3', 'title' => 'baz', 'parent' => 'test.example2', 'weight' => 2)),
-      4 => MenuLinkMock::create(array('id' => 'test.example4', 'route_name' => 'example4', 'title' => 'qux', 'parent' => 'test.example3', 'weight' => 3)),
-      5 => MenuLinkMock::create(array('id' => 'test.example5', 'route_name' => 'example5', 'title' => 'foofoo', 'parent' => '', 'expanded' => TRUE, 'weight' => 4)),
-      6 => MenuLinkMock::create(array('id' => 'test.example6', 'route_name' => '', 'url' => 'https://www.drupal.org/', 'title' => 'barbar', 'parent' => '', 'weight' => 5)),
-      7 => MenuLinkMock::create(array('id' => 'test.example7', 'route_name' => 'example7', 'title' => 'bazbaz', 'parent' => 'test.example5', 'weight' => 6)),
-      8 => MenuLinkMock::create(array('id' => 'test.example8', 'route_name' => 'example8', 'title' => 'quxqux', 'parent' => '', 'weight' => 7)),
-    );
+    $links = [
+      1 => MenuLinkMock::create(['id' => 'test.example1', 'route_name' => 'example1', 'title' => 'foo', 'parent' => '', 'weight' => 0]),
+      2 => MenuLinkMock::create(['id' => 'test.example2', 'route_name' => 'example2', 'title' => 'bar', 'parent' => '', 'route_parameters' => ['foo' => 'bar'], 'weight' => 1]),
+      3 => MenuLinkMock::create(['id' => 'test.example3', 'route_name' => 'example3', 'title' => 'baz', 'parent' => 'test.example2', 'weight' => 2]),
+      4 => MenuLinkMock::create(['id' => 'test.example4', 'route_name' => 'example4', 'title' => 'qux', 'parent' => 'test.example3', 'weight' => 3]),
+      5 => MenuLinkMock::create(['id' => 'test.example5', 'route_name' => 'example5', 'title' => 'foofoo', 'parent' => '', 'expanded' => TRUE, 'weight' => 4]),
+      6 => MenuLinkMock::create(['id' => 'test.example6', 'route_name' => '', 'url' => 'https://www.drupal.org/', 'title' => 'barbar', 'parent' => '', 'weight' => 5]),
+      7 => MenuLinkMock::create(['id' => 'test.example7', 'route_name' => 'example7', 'title' => 'bazbaz', 'parent' => 'test.example5', 'weight' => 6]),
+      8 => MenuLinkMock::create(['id' => 'test.example8', 'route_name' => 'example8', 'title' => 'quxqux', 'parent' => '', 'weight' => 7]),
+    ];
     foreach ($links as $instance) {
       $this->menuLinkManager->addDefinition($instance->getPluginId(), $instance->getPluginDefinition());
     }
@@ -152,25 +152,25 @@ protected function setUp() {
    */
   public function testSystemMenuBlockConfigDependencies() {
 
-    $block = Block::create(array(
+    $block = Block::create([
       'plugin' => 'system_menu_block:' . $this->menu->id(),
       'region' => 'footer',
       'id' => 'machinename',
       'theme' => 'stark',
-    ));
+    ]);
 
     $dependencies = $block->calculateDependencies()->getDependencies();
-    $expected = array(
-      'config' => array(
+    $expected = [
+      'config' => [
         'system.menu.' . $this->menu->id()
-      ),
-      'module' => array(
+      ],
+      'module' => [
         'system'
-      ),
-      'theme' => array(
+      ],
+      'theme' => [
         'stark'
-      ),
-    );
+      ],
+    ];
     $this->assertIdentical($expected, $dependencies);
   }
 
@@ -180,13 +180,13 @@ public function testSystemMenuBlockConfigDependencies() {
   public function testConfigLevelDepth() {
     // Helper function to generate a configured block instance.
     $place_block = function ($level, $depth) {
-      return $this->blockManager->createInstance('system_menu_block:' . $this->menu->id(), array(
+      return $this->blockManager->createInstance('system_menu_block:' . $this->menu->id(), [
         'region' => 'footer',
         'id' => 'machinename',
         'theme' => 'stark',
         'level' => $level,
         'depth' => $depth,
-      ));
+      ]);
     };
 
     // All the different block instances we're going to test.
diff --git a/core/modules/system/tests/src/Kernel/Common/SystemListingTest.php b/core/modules/system/tests/src/Kernel/Common/SystemListingTest.php
index 7de7ecfb65d5fdc15ff6da9340c6666f30606226..fc30a1c504d7892e3b8bf0ed793d8621bf00c1db 100644
--- a/core/modules/system/tests/src/Kernel/Common/SystemListingTest.php
+++ b/core/modules/system/tests/src/Kernel/Common/SystemListingTest.php
@@ -17,14 +17,14 @@ class SystemListingTest extends KernelTestBase {
   function testDirectoryPrecedence() {
     // Define the module files we will search for, and the directory precedence
     // we expect.
-    $expected_directories = array(
+    $expected_directories = [
       // When both copies of the module are compatible with Drupal core, the
       // copy in the profile directory takes precedence.
-      'drupal_system_listing_compatible_test' => array(
+      'drupal_system_listing_compatible_test' => [
         'core/profiles/testing/modules',
         'core/modules/system/tests/modules',
-      ),
-    );
+      ],
+    ];
 
     // This test relies on two versions of the same module existing in
     // different places in the filesystem. Without that, the test has no
@@ -32,22 +32,22 @@ function testDirectoryPrecedence() {
     foreach ($expected_directories as $module => $directories) {
       foreach ($directories as $directory) {
         $filename = "$directory/$module/$module.info.yml";
-        $this->assertTrue(file_exists(\Drupal::root() . '/' . $filename), format_string('@filename exists.', array('@filename' => $filename)));
+        $this->assertTrue(file_exists(\Drupal::root() . '/' . $filename), format_string('@filename exists.', ['@filename' => $filename]));
       }
     }
 
     // Now scan the directories and check that the files take precedence as
     // expected.
     $listing = new ExtensionDiscovery(\Drupal::root());
-    $listing->setProfileDirectories(array('core/profiles/testing'));
+    $listing->setProfileDirectories(['core/profiles/testing']);
     $files = $listing->scan('module');
     foreach ($expected_directories as $module => $directories) {
       $expected_directory = array_shift($directories);
       $expected_uri = "$expected_directory/$module/$module.info.yml";
-      $this->assertEqual($files[$module]->getPathname(), $expected_uri, format_string('Module @actual was found at @expected.', array(
+      $this->assertEqual($files[$module]->getPathname(), $expected_uri, format_string('Module @actual was found at @expected.', [
         '@actual' => $files[$module]->getPathname(),
         '@expected' => $expected_uri,
-      )));
+      ]));
     }
   }
 
@@ -56,7 +56,7 @@ function testDirectoryPrecedence() {
    */
   public function testFileScanIgnoreDirectory() {
     $listing = new ExtensionDiscovery(\Drupal::root(), FALSE);
-    $listing->setProfileDirectories(array('core/profiles/testing'));
+    $listing->setProfileDirectories(['core/profiles/testing']);
     $files = $listing->scan('module');
     $this->assertArrayHasKey('drupal_system_listing_compatible_test', $files);
 
@@ -68,7 +68,7 @@ public function testFileScanIgnoreDirectory() {
 
     $this->setSetting('file_scan_ignore_directories', ['drupal_system_listing_compatible_test']);
     $listing = new ExtensionDiscovery(\Drupal::root(), FALSE);
-    $listing->setProfileDirectories(array('core/profiles/testing'));
+    $listing->setProfileDirectories(['core/profiles/testing']);
     $files = $listing->scan('module');
     $this->assertArrayNotHasKey('drupal_system_listing_compatible_test', $files);
   }
diff --git a/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php b/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
index 8a3e98ed8ac89b1906b12392a6c5010857e4e39a..8ee66ee5c4af8c2cdf5de6868ae5c04d21995d66 100644
--- a/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
+++ b/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
@@ -44,7 +44,7 @@ function testModuleList() {
     $this->assertModuleList($module_list, 'Initial');
 
     // Try to install a new module.
-    $this->moduleInstaller()->install(array('ban'));
+    $this->moduleInstaller()->install(['ban']);
     $module_list[] = 'ban';
     sort($module_list);
     $this->assertModuleList($module_list, 'After adding a module');
@@ -58,10 +58,10 @@ function testModuleList() {
     $this->assertModuleList($module_list, 'After changing weights');
 
     // Test the fixed list feature.
-    $fixed_list = array(
+    $fixed_list = [
       'system' => 'core/modules/system/system.module',
       'menu' => 'core/modules/menu/menu.module',
-    );
+    ];
     $this->moduleHandler()->setModuleList($fixed_list);
     $new_module_list = array_combine(array_keys($fixed_list), array_keys($fixed_list));
     $this->assertModuleList($new_module_list, t('When using a fixed list'));
@@ -77,7 +77,7 @@ function testModuleList() {
   protected function assertModuleList(array $expected_values, $condition) {
     $expected_values = array_values(array_unique($expected_values));
     $enabled_modules = array_keys($this->container->get('module_handler')->getModuleList());
-    $this->assertEqual($expected_values, $enabled_modules, format_string('@condition: extension handler returns correct results', array('@condition' => $condition)));
+    $this->assertEqual($expected_values, $enabled_modules, format_string('@condition: extension handler returns correct results', ['@condition' => $condition]));
   }
 
   /**
@@ -93,7 +93,7 @@ protected function assertModuleList(array $expected_values, $condition) {
    * @see https://www.drupal.org/files/issues/dep.gv__0.png
    */
   function testDependencyResolution() {
-    $this->enableModules(array('module_test'));
+    $this->enableModules(['module_test']);
     $this->assertTrue($this->moduleHandler()->moduleExists('module_test'), 'Test module is enabled.');
 
     // Ensure that modules are not enabled.
@@ -108,7 +108,7 @@ function testDependencyResolution() {
     drupal_static_reset('system_rebuild_module_data');
 
     try {
-      $result = $this->moduleInstaller()->install(array('color'));
+      $result = $this->moduleInstaller()->install(['color']);
       $this->fail(t('ModuleInstaller::install() throws an exception if dependencies are missing.'));
     }
     catch (MissingDependencyException $e) {
@@ -122,7 +122,7 @@ function testDependencyResolution() {
     \Drupal::state()->set('module_test.dependency', 'dependency');
     drupal_static_reset('system_rebuild_module_data');
 
-    $result = $this->moduleInstaller()->install(array('color'));
+    $result = $this->moduleInstaller()->install(['color']);
     $this->assertTrue($result, 'ModuleInstaller::install() returns the correct value.');
 
     // Verify that the fake dependency chain was installed.
@@ -132,20 +132,20 @@ function testDependencyResolution() {
     $this->assertTrue($this->moduleHandler()->moduleExists('color'), 'Module installation with dependencies succeeded.');
 
     // Verify that the modules were enabled in the correct order.
-    $module_order = \Drupal::state()->get('module_test.install_order') ?: array();
-    $this->assertEqual($module_order, array('help', 'config', 'color'));
+    $module_order = \Drupal::state()->get('module_test.install_order') ?: [];
+    $this->assertEqual($module_order, ['help', 'config', 'color']);
 
     // Uninstall all three modules explicitly, but in the incorrect order,
     // and make sure that ModuleInstaller::uninstall() uninstalled them in the
     // correct sequence.
-    $result = $this->moduleInstaller()->uninstall(array('config', 'help', 'color'));
+    $result = $this->moduleInstaller()->uninstall(['config', 'help', 'color']);
     $this->assertTrue($result, 'ModuleInstaller::uninstall() returned TRUE.');
 
-    foreach (array('color', 'config', 'help') as $module) {
+    foreach (['color', 'config', 'help'] as $module) {
       $this->assertEqual(drupal_get_installed_schema_version($module), SCHEMA_UNINSTALLED, "$module module was uninstalled.");
     }
-    $uninstalled_modules = \Drupal::state()->get('module_test.uninstall_order') ?: array();
-    $this->assertEqual($uninstalled_modules, array('color', 'config', 'help'), 'Modules were uninstalled in the correct order.');
+    $uninstalled_modules = \Drupal::state()->get('module_test.uninstall_order') ?: [];
+    $this->assertEqual($uninstalled_modules, ['color', 'config', 'help'], 'Modules were uninstalled in the correct order.');
 
     // Enable Color module again, which should enable both the Config module and
     // Help module. But, this time do it with Config module declaring a
@@ -154,7 +154,7 @@ function testDependencyResolution() {
     \Drupal::state()->set('module_test.dependency', 'version dependency');
     drupal_static_reset('system_rebuild_module_data');
 
-    $result = $this->moduleInstaller()->install(array('color'));
+    $result = $this->moduleInstaller()->install(['color']);
     $this->assertTrue($result, 'ModuleInstaller::install() returns the correct value.');
 
     // Verify that the fake dependency chain was installed.
@@ -164,8 +164,8 @@ function testDependencyResolution() {
     $this->assertTrue($this->moduleHandler()->moduleExists('color'), 'Module installation with version dependencies succeeded.');
 
     // Finally, verify that the modules were enabled in the correct order.
-    $enable_order = \Drupal::state()->get('module_test.install_order') ?: array();
-    $this->assertIdentical($enable_order, array('help', 'config', 'color'));
+    $enable_order = \Drupal::state()->get('module_test.install_order') ?: [];
+    $this->assertIdentical($enable_order, ['help', 'config', 'color']);
   }
 
   /**
@@ -180,23 +180,23 @@ function testUninstallProfileDependency() {
     // yet have any cached way to retrieve its location.
     // @todo Remove as part of https://www.drupal.org/node/2186491
     drupal_get_filename('profile', $profile, 'core/profiles/' . $profile . '/' . $profile . '.info.yml');
-    $this->enableModules(array('module_test', $profile));
+    $this->enableModules(['module_test', $profile]);
 
     drupal_static_reset('system_rebuild_module_data');
     $data = system_rebuild_module_data();
     $this->assertTrue(isset($data[$profile]->requires[$dependency]));
 
-    $this->moduleInstaller()->install(array($dependency));
+    $this->moduleInstaller()->install([$dependency]);
     $this->assertTrue($this->moduleHandler()->moduleExists($dependency));
 
     // Uninstall the profile module "dependency".
-    $result = $this->moduleInstaller()->uninstall(array($dependency));
+    $result = $this->moduleInstaller()->uninstall([$dependency]);
     $this->assertTrue($result, 'ModuleInstaller::uninstall() returns TRUE.');
     $this->assertFalse($this->moduleHandler()->moduleExists($dependency));
     $this->assertEqual(drupal_get_installed_schema_version($dependency), SCHEMA_UNINSTALLED, "$dependency module was uninstalled.");
 
     // Verify that the installation profile itself was not uninstalled.
-    $uninstalled_modules = \Drupal::state()->get('module_test.uninstall_order') ?: array();
+    $uninstalled_modules = \Drupal::state()->get('module_test.uninstall_order') ?: [];
     $this->assertTrue(in_array($dependency, $uninstalled_modules), "$dependency module is in the list of uninstalled modules.");
     $this->assertFalse(in_array($profile, $uninstalled_modules), 'The installation profile is not in the list of uninstalled modules.');
   }
@@ -205,7 +205,7 @@ function testUninstallProfileDependency() {
    * Tests uninstalling a module that has content.
    */
   function testUninstallContentDependency() {
-    $this->enableModules(array('module_test', 'entity_test', 'text', 'user', 'help'));
+    $this->enableModules(['module_test', 'entity_test', 'text', 'user', 'help']);
     $this->assertTrue($this->moduleHandler()->moduleExists('entity_test'), 'Test module is enabled.');
     $this->assertTrue($this->moduleHandler()->moduleExists('module_test'), 'Test module is enabled.');
 
@@ -224,13 +224,13 @@ function testUninstallContentDependency() {
     drupal_static_reset('system_rebuild_module_data');
 
     // Create an entity so that the modules can not be disabled.
-    $entity = EntityTest::create(array('name' => $this->randomString()));
+    $entity = EntityTest::create(['name' => $this->randomString()]);
     $entity->save();
 
     // Uninstalling entity_test is not possible when there is content.
     try {
       $message = 'ModuleInstaller::uninstall() throws ModuleUninstallValidatorException upon uninstalling a module which does not pass validation.';
-      $this->moduleInstaller()->uninstall(array('entity_test'));
+      $this->moduleInstaller()->uninstall(['entity_test']);
       $this->fail($message);
     }
     catch (ModuleUninstallValidatorException $e) {
@@ -240,7 +240,7 @@ function testUninstallContentDependency() {
     // Uninstalling help needs entity_test to be un-installable.
     try {
       $message = 'ModuleInstaller::uninstall() throws ModuleUninstallValidatorException upon uninstalling a module which does not pass validation.';
-      $this->moduleInstaller()->uninstall(array('help'));
+      $this->moduleInstaller()->uninstall(['help']);
       $this->fail($message);
     }
     catch (ModuleUninstallValidatorException $e) {
@@ -250,7 +250,7 @@ function testUninstallContentDependency() {
     // Deleting the entity.
     $entity->delete();
 
-    $result = $this->moduleInstaller()->uninstall(array('help'));
+    $result = $this->moduleInstaller()->uninstall(['help']);
     $this->assertTrue($result, 'ModuleInstaller::uninstall() returns TRUE.');
     $this->assertEqual(drupal_get_installed_schema_version('entity_test'), SCHEMA_UNINSTALLED, "entity_test module was uninstalled.");
   }
diff --git a/core/modules/system/tests/src/Kernel/Migrate/d6/MigrateDateFormatTest.php b/core/modules/system/tests/src/Kernel/Migrate/d6/MigrateDateFormatTest.php
index 54aaac277b00d5005fe0a472349bc7ae35bdafb8..b45a36050f0d6765eac4651159b297b92e417ceb 100644
--- a/core/modules/system/tests/src/Kernel/Migrate/d6/MigrateDateFormatTest.php
+++ b/core/modules/system/tests/src/Kernel/Migrate/d6/MigrateDateFormatTest.php
@@ -37,7 +37,7 @@ public function testDateFormats() {
     // Test that we can re-import using the EntityDateFormat destination.
     Database::getConnection('default', 'migrate')
       ->update('variable')
-      ->fields(array('value' => serialize('\S\H\O\R\T d/m/Y - H:i')))
+      ->fields(['value' => serialize('\S\H\O\R\T d/m/Y - H:i')])
       ->condition('name', 'date_format_short')
       ->execute();
 
diff --git a/core/modules/system/tests/src/Kernel/Migrate/d6/MigrateMenuTest.php b/core/modules/system/tests/src/Kernel/Migrate/d6/MigrateMenuTest.php
index aff0c3f0f43f2516cd1fdb202811a96f72a7ef54..51c937789374e208015d683dd965c6cb32070df3 100644
--- a/core/modules/system/tests/src/Kernel/Migrate/d6/MigrateMenuTest.php
+++ b/core/modules/system/tests/src/Kernel/Migrate/d6/MigrateMenuTest.php
@@ -36,7 +36,7 @@ public function testMenu() {
     // Test that we can re-import using the ConfigEntityBase destination.
     Database::getConnection('default', 'migrate')
       ->update('menu_custom')
-      ->fields(array('title' => 'Home Navigation'))
+      ->fields(['title' => 'Home Navigation'])
       ->condition('menu_name', 'navigation')
       ->execute();
 
diff --git a/core/modules/system/tests/src/Kernel/Migrate/d7/MigrateMenuTest.php b/core/modules/system/tests/src/Kernel/Migrate/d7/MigrateMenuTest.php
index 4a03afe2e223ec25b9f33a1ac686be12de9bcdb4..455be2ad14742a09604c82ee586a4734d45b0fc6 100644
--- a/core/modules/system/tests/src/Kernel/Migrate/d7/MigrateMenuTest.php
+++ b/core/modules/system/tests/src/Kernel/Migrate/d7/MigrateMenuTest.php
@@ -51,7 +51,7 @@ public function testMenu() {
     // Test that we can re-import using the ConfigEntityBase destination.
     Database::getConnection('default', 'migrate')
       ->update('menu_custom')
-      ->fields(array('title' => 'Home Navigation'))
+      ->fields(['title' => 'Home Navigation'])
       ->condition('menu_name', 'navigation')
       ->execute();
 
diff --git a/core/modules/system/tests/src/Kernel/PhpStorage/PhpStorageFactoryTest.php b/core/modules/system/tests/src/Kernel/PhpStorage/PhpStorageFactoryTest.php
index 8adee9d929de7a3a862a44e4007e2432a3edac16..4d1c258b5680ffc5e566fc9269e53547026fc462 100644
--- a/core/modules/system/tests/src/Kernel/PhpStorage/PhpStorageFactoryTest.php
+++ b/core/modules/system/tests/src/Kernel/PhpStorage/PhpStorageFactoryTest.php
@@ -57,19 +57,19 @@ public function testGetOverride() {
     $this->assertTrue($php instanceof MockPhpStorage, 'A MockPhpStorage instance was returned from overridden settings.');
 
     // Test that the name is used for the bin when it is NULL.
-    $this->setSettings('test', array('bin' => NULL));
+    $this->setSettings('test', ['bin' => NULL]);
     $php = PhpStorageFactory::get('test');
     $this->assertTrue($php instanceof MockPhpStorage, 'An MockPhpStorage instance was returned from overridden settings.');
     $this->assertSame('test', $php->getConfigurationValue('bin'), 'Name value was used for bin.');
 
     // Test that a default directory is set if it's empty.
-    $this->setSettings('test', array('directory' => NULL));
+    $this->setSettings('test', ['directory' => NULL]);
     $php = PhpStorageFactory::get('test');
     $this->assertTrue($php instanceof MockPhpStorage, 'An MockPhpStorage instance was returned from overridden settings.');
     $this->assertSame(PublicStream::basePath() . '/php', $php->getConfigurationValue('directory'), 'Default file directory was used.');
 
     // Test that a default storage class is set if it's empty.
-    $this->setSettings('test', array('class' => NULL));
+    $this->setSettings('test', ['class' => NULL]);
     $php = PhpStorageFactory::get('test');
     $this->assertTrue($php instanceof MTimeProtectedFileStorage, 'An MTimeProtectedFileStorage instance was returned from overridden settings with no class.');
 
@@ -79,7 +79,7 @@ public function testGetOverride() {
     $this->assertNotEquals('mock hash salt', $php->getConfigurationValue('secret'), 'The default secret is not used if a secret is set in the overridden settings.');
 
     // Test that a default secret is set if it's empty.
-    $this->setSettings('test', array('secret' => NULL));
+    $this->setSettings('test', ['secret' => NULL]);
     $php = PhpStorageFactory::get('test');
     $this->assertSame('mock hash salt', $php->getConfigurationValue('secret'), 'The default secret is used if one is not set in the overridden settings.');
   }
@@ -92,13 +92,13 @@ public function testGetOverride() {
    * @param array $configuration
    *   An array of configuration to set. Will be merged with default values.
    */
-  protected function setSettings($name = 'default', array $configuration = array()) {
-    $settings['php_storage'][$name] = $configuration + array(
+  protected function setSettings($name = 'default', array $configuration = []) {
+    $settings['php_storage'][$name] = $configuration + [
       'class' => 'Drupal\system\PhpStorage\MockPhpStorage',
       'directory' => 'tmp://',
       'secret' => $this->randomString(),
       'bin' => 'test',
-    );
+    ];
     $settings['hash_salt'] = 'mock hash salt';
     new Settings($settings);
   }
diff --git a/core/modules/system/tests/src/Kernel/Render/ClassyTest.php b/core/modules/system/tests/src/Kernel/Render/ClassyTest.php
index 76cf23ee6346107ba1178c41c9864b45174e3f10..776cb2e672f26b3c0641af3f22d2cf4a0fa968e3 100644
--- a/core/modules/system/tests/src/Kernel/Render/ClassyTest.php
+++ b/core/modules/system/tests/src/Kernel/Render/ClassyTest.php
@@ -14,7 +14,7 @@ class ClassyTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('system', 'twig_theme_test');
+  public static $modules = ['system', 'twig_theme_test'];
 
   /**
    * {@inheritdoc}
@@ -39,9 +39,9 @@ public function setUp() {
   function testClassyTheme() {
     drupal_set_message('An error occurred', 'error');
     drupal_set_message('But then something nice happened');
-    $messages = array(
+    $messages = [
       '#type' => 'status_messages',
-    );
+    ];
     $this->render($messages);
     $this->assertNoText('custom-test-messages-class', 'The custom class attribute value added in the status messages preprocess function is not displayed as page content.');
   }
diff --git a/core/modules/system/tests/src/Kernel/Scripts/DbImportCommandTest.php b/core/modules/system/tests/src/Kernel/Scripts/DbImportCommandTest.php
index c90d22663d34af1d321384ce6183134cde2fa35b..8a292e502d430e0816e6128c1d89041e883ade4d 100644
--- a/core/modules/system/tests/src/Kernel/Scripts/DbImportCommandTest.php
+++ b/core/modules/system/tests/src/Kernel/Scripts/DbImportCommandTest.php
@@ -51,10 +51,10 @@ class DbImportCommandTest extends KernelTestBase {
    * @requires extension pdo_sqlite
    */
   public function testDbImportCommand() {
-    $connection_info = array(
+    $connection_info = [
       'driver' => 'sqlite',
       'database' => ':memory:',
-    );
+    ];
     Database::addConnectionInfo($this->databasePrefix, 'default', $connection_info);
 
     $command = new DbImportCommand();
diff --git a/core/modules/system/tests/src/Kernel/System/CronQueueTest.php b/core/modules/system/tests/src/Kernel/System/CronQueueTest.php
index c51ee5a87af22f73e3c56756fb0d63d1bb75e470..649a2c7526581df78e58858a0eee9a1dc0a04fe2 100644
--- a/core/modules/system/tests/src/Kernel/System/CronQueueTest.php
+++ b/core/modules/system/tests/src/Kernel/System/CronQueueTest.php
@@ -55,7 +55,7 @@ public function testExceptions() {
     $queue = $this->container->get('queue')->get('cron_queue_test_exception');
 
     // Enqueue an item for processing.
-    $queue->createItem(array($this->randomMachineName() => $this->randomMachineName()));
+    $queue->createItem([$this->randomMachineName() => $this->randomMachineName()]);
 
     // Run cron; the worker for this queue should throw an exception and handle
     // it.
diff --git a/core/modules/system/tests/src/Kernel/System/InfoAlterTest.php b/core/modules/system/tests/src/Kernel/System/InfoAlterTest.php
index 8e6f79e010d7e5de66e47711b766735c03f721a9..f8963273a610511a4ed563e97438b6463631e00d 100644
--- a/core/modules/system/tests/src/Kernel/System/InfoAlterTest.php
+++ b/core/modules/system/tests/src/Kernel/System/InfoAlterTest.php
@@ -11,7 +11,7 @@
  */
 class InfoAlterTest extends KernelTestBase {
 
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Tests that theme .info.yml data is rebuild after enabling a module.
@@ -26,7 +26,7 @@ function testSystemInfoAlter() {
     $this->assertFalse(isset($info['node']->info['required']), 'Before the module_required_test is installed the node module is not required.');
 
     // Enable the test module.
-    \Drupal::service('module_installer')->install(array('module_required_test'), FALSE);
+    \Drupal::service('module_installer')->install(['module_required_test'], FALSE);
     $this->assertTrue(\Drupal::moduleHandler()->moduleExists('module_required_test'), 'Test required module is enabled.');
 
     $info = system_rebuild_module_data();
diff --git a/core/modules/system/tests/src/Kernel/Token/TokenReplaceKernelTest.php b/core/modules/system/tests/src/Kernel/Token/TokenReplaceKernelTest.php
index 040cf1a353b98fd94660a8d63b30e6911505283c..b334e641225cbb616d0bc90bcd4fbc86d0d3d47a 100644
--- a/core/modules/system/tests/src/Kernel/Token/TokenReplaceKernelTest.php
+++ b/core/modules/system/tests/src/Kernel/Token/TokenReplaceKernelTest.php
@@ -29,25 +29,25 @@ protected function setUp() {
    */
   public function testSystemTokenRecognition() {
     // Generate prefixes and suffixes for the token context.
-    $tests = array(
-      array('prefix' => 'this is the ', 'suffix' => ' site'),
-      array('prefix' => 'this is the', 'suffix' => 'site'),
-      array('prefix' => '[', 'suffix' => ']'),
-      array('prefix' => '', 'suffix' => ']]]'),
-      array('prefix' => '[[[', 'suffix' => ''),
-      array('prefix' => ':[:', 'suffix' => '--]'),
-      array('prefix' => '-[-', 'suffix' => ':]:'),
-      array('prefix' => '[:', 'suffix' => ']'),
-      array('prefix' => '[site:', 'suffix' => ':name]'),
-      array('prefix' => '[site:', 'suffix' => ']'),
-    );
+    $tests = [
+      ['prefix' => 'this is the ', 'suffix' => ' site'],
+      ['prefix' => 'this is the', 'suffix' => 'site'],
+      ['prefix' => '[', 'suffix' => ']'],
+      ['prefix' => '', 'suffix' => ']]]'],
+      ['prefix' => '[[[', 'suffix' => ''],
+      ['prefix' => ':[:', 'suffix' => '--]'],
+      ['prefix' => '-[-', 'suffix' => ':]:'],
+      ['prefix' => '[:', 'suffix' => ']'],
+      ['prefix' => '[site:', 'suffix' => ':name]'],
+      ['prefix' => '[site:', 'suffix' => ']'],
+    ];
 
     // Check if the token is recognized in each of the contexts.
     foreach ($tests as $test) {
       $input = $test['prefix'] . '[site:name]' . $test['suffix'];
       $expected = $test['prefix'] . 'Drupal' . $test['suffix'];
-      $output = $this->tokenService->replace($input, array(), array('langcode' => $this->interfaceLanguage->getId()));
-      $this->assertTrue($output == $expected, format_string('Token recognized in string %string', array('%string' => $input)));
+      $output = $this->tokenService->replace($input, [], ['langcode' => $this->interfaceLanguage->getId()]);
+      $this->assertTrue($output == $expected, format_string('Token recognized in string %string', ['%string' => $input]));
     }
 
     // Test token replacement when the string contains no tokens.
@@ -67,12 +67,12 @@ public function testClear() {
 
     // Replace with the clear parameter, only the valid token should remain.
     $target = Html::escape($this->config('system.site')->get('name'));
-    $result = $this->tokenService->replace($source, array(), array('langcode' => $this->interfaceLanguage->getId(), 'clear' => TRUE));
+    $result = $this->tokenService->replace($source, [], ['langcode' => $this->interfaceLanguage->getId(), 'clear' => TRUE]);
     $this->assertEqual($target, $result, 'Valid tokens replaced while invalid tokens ignored.');
 
     $target .= '[user:name]';
     $target .= '[bogus:token]';
-    $result = $this->tokenService->replace($source, array(), array('langcode' => $this->interfaceLanguage->getId()));
+    $result = $this->tokenService->replace($source, [], ['langcode' => $this->interfaceLanguage->getId()]);
     $this->assertEqual($target, $result, 'Valid tokens replaced while invalid tokens ignored.');
   }
 
@@ -80,10 +80,10 @@ public function testClear() {
    * Tests the generation of all system site information tokens.
    */
   public function testSystemSiteTokenReplacement() {
-    $url_options = array(
+    $url_options = [
       'absolute' => TRUE,
       'language' => $this->interfaceLanguage,
-    );
+    ];
 
     $slogan = '<blink>Slogan</blink>';
     $safe_slogan = Xss::filterAdmin($slogan);
@@ -98,12 +98,12 @@ public function testSystemSiteTokenReplacement() {
 
 
     // Generate and test tokens.
-    $tests = array();
+    $tests = [];
     $tests['[site:name]'] = Html::escape($config->get('name'));
     $tests['[site:slogan]'] = $safe_slogan;
     $tests['[site:mail]'] = $config->get('mail');
     $tests['[site:url]'] = \Drupal::url('<front>', [], $url_options);
-    $tests['[site:url-brief]'] = preg_replace(array('!^https?://!', '!/$!'), '', \Drupal::url('<front>', [], $url_options));
+    $tests['[site:url-brief]'] = preg_replace(['!^https?://!', '!/$!'], '', \Drupal::url('<front>', [], $url_options));
     $tests['[site:login-url]'] = \Drupal::url('user.page', [], $url_options);
 
     $base_bubbleable_metadata = new BubbleableMetadata();
@@ -122,7 +122,7 @@ public function testSystemSiteTokenReplacement() {
 
     foreach ($tests as $input => $expected) {
       $bubbleable_metadata = new BubbleableMetadata();
-      $output = $this->tokenService->replace($input, array(), array('langcode' => $this->interfaceLanguage->getId()), $bubbleable_metadata);
+      $output = $this->tokenService->replace($input, [], ['langcode' => $this->interfaceLanguage->getId()], $bubbleable_metadata);
       $this->assertEqual($output, $expected, new FormattableMarkup('System site information token %token replaced.', ['%token' => $input]));
       $this->assertEqual($bubbleable_metadata, $metadata_tests[$input]);
     }
@@ -136,21 +136,21 @@ public function testSystemDateTokenReplacement() {
     $date = REQUEST_TIME - 3600;
 
     // Generate and test tokens.
-    $tests = array();
+    $tests = [];
     $date_formatter = \Drupal::service('date.formatter');
     $tests['[date:short]'] = $date_formatter->format($date, 'short', '', NULL, $this->interfaceLanguage->getId());
     $tests['[date:medium]'] = $date_formatter->format($date, 'medium', '', NULL, $this->interfaceLanguage->getId());
     $tests['[date:long]'] = $date_formatter->format($date, 'long', '', NULL, $this->interfaceLanguage->getId());
     $tests['[date:custom:m/j/Y]'] = $date_formatter->format($date, 'custom', 'm/j/Y', NULL, $this->interfaceLanguage->getId());
-    $tests['[date:since]'] = $date_formatter->formatTimeDiffSince($date, array('langcode' => $this->interfaceLanguage->getId()));
+    $tests['[date:since]'] = $date_formatter->formatTimeDiffSince($date, ['langcode' => $this->interfaceLanguage->getId()]);
     $tests['[date:raw]'] = Xss::filter($date);
 
     // Test to make sure that we generated something for each token.
     $this->assertFalse(in_array(0, array_map('strlen', $tests)), 'No empty tokens generated.');
 
     foreach ($tests as $input => $expected) {
-      $output = $this->tokenService->replace($input, array('date' => $date), array('langcode' => $this->interfaceLanguage->getId()));
-      $this->assertEqual($output, $expected, format_string('Date token %token replaced.', array('%token' => $input)));
+      $output = $this->tokenService->replace($input, ['date' => $date], ['langcode' => $this->interfaceLanguage->getId()]);
+      $this->assertEqual($output, $expected, format_string('Date token %token replaced.', ['%token' => $input]));
     }
   }
 
diff --git a/core/modules/system/tests/src/Kernel/Token/TokenReplaceKernelTestBase.php b/core/modules/system/tests/src/Kernel/Token/TokenReplaceKernelTestBase.php
index 0e2a3fc616f9cbdb4a342412087a28ee91afe7eb..2c8339060486644d75fb359c365153c610633fd1 100644
--- a/core/modules/system/tests/src/Kernel/Token/TokenReplaceKernelTestBase.php
+++ b/core/modules/system/tests/src/Kernel/Token/TokenReplaceKernelTestBase.php
@@ -28,12 +28,12 @@ abstract class TokenReplaceKernelTestBase extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   protected function setUp() {
     parent::setUp();
     // Install default system configuration.
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
     \Drupal::service('router.builder')->rebuild();
 
     $this->interfaceLanguage = \Drupal::languageManager()->getCurrentLanguage();
diff --git a/core/modules/system/tests/src/Unit/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php b/core/modules/system/tests/src/Unit/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php
index eb095a78076de0f861feb0837596b1c78e9ce11b..d1eb8fb903e6d38e6d56b5db1cb3031e2ebebfce 100644
--- a/core/modules/system/tests/src/Unit/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php
+++ b/core/modules/system/tests/src/Unit/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php
@@ -94,7 +94,7 @@ protected function setUp() {
 
     $this->requestMatcher = $this->getMock('\Symfony\Component\Routing\Matcher\RequestMatcherInterface');
 
-    $config_factory = $this->getConfigFactoryStub(array('system.site' => array('front' => 'test_frontpage')));
+    $config_factory = $this->getConfigFactoryStub(['system.site' => ['front' => 'test_frontpage']]);
 
     $this->pathProcessor = $this->getMock('\Drupal\Core\PathProcessor\InboundPathProcessorInterface');
     $this->context = $this->getMock('\Drupal\Core\Routing\RequestContext');
@@ -182,11 +182,11 @@ public function testBuildWithTwoPathElements() {
       ->method('matchRequest')
       ->will($this->returnCallback(function(Request $request) use ($route_1) {
         if ($request->getPathInfo() == '/example') {
-          return array(
+          return [
             RouteObjectInterface::ROUTE_NAME => 'example',
             RouteObjectInterface::ROUTE_OBJECT => $route_1,
-            '_raw_variables' => new ParameterBag(array()),
-          );
+            '_raw_variables' => new ParameterBag([]),
+          ];
         }
       }));
 
@@ -218,18 +218,18 @@ public function testBuildWithThreePathElements() {
       ->method('matchRequest')
       ->will($this->returnCallback(function(Request $request) use ($route_1, $route_2) {
         if ($request->getPathInfo() == '/example/bar') {
-          return array(
+          return [
             RouteObjectInterface::ROUTE_NAME => 'example_bar',
             RouteObjectInterface::ROUTE_OBJECT => $route_1,
-            '_raw_variables' => new ParameterBag(array()),
-          );
+            '_raw_variables' => new ParameterBag([]),
+          ];
         }
         elseif ($request->getPathInfo() == '/example') {
-          return array(
+          return [
             RouteObjectInterface::ROUTE_NAME => 'example',
             RouteObjectInterface::ROUTE_OBJECT => $route_2,
-            '_raw_variables' => new ParameterBag(array()),
-          );
+            '_raw_variables' => new ParameterBag([]),
+          ];
         }
       }));
 
@@ -286,11 +286,11 @@ public function testBuildWithException($exception_class, $exception_argument) {
    * @see \Drupal\Tests\system\Unit\Breadcrumbs\PathBasedBreadcrumbBuilderTest::testBuildWithException()
    */
   public function providerTestBuildWithException() {
-    return array(
-      array('Drupal\Core\ParamConverter\ParamNotConvertedException', ''),
-      array('Symfony\Component\Routing\Exception\MethodNotAllowedException', array()),
-      array('Symfony\Component\Routing\Exception\ResourceNotFoundException', ''),
-    );
+    return [
+      ['Drupal\Core\ParamConverter\ParamNotConvertedException', ''],
+      ['Symfony\Component\Routing\Exception\MethodNotAllowedException', []],
+      ['Symfony\Component\Routing\Exception\ResourceNotFoundException', ''],
+    ];
   }
 
   /**
@@ -310,7 +310,7 @@ public function testBuildWithNonProcessedPath() {
 
     $this->requestMatcher->expects($this->any())
       ->method('matchRequest')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $breadcrumb = $this->builder->build($this->getMock('Drupal\Core\Routing\RouteMatchInterface'));
 
@@ -348,11 +348,11 @@ public function testBuildWithUserPath() {
       ->method('matchRequest')
       ->will($this->returnCallback(function(Request $request) use ($route_1) {
         if ($request->getPathInfo() == '/user/1') {
-          return array(
+          return [
             RouteObjectInterface::ROUTE_NAME => 'user_page',
             RouteObjectInterface::ROUTE_OBJECT => $route_1,
-            '_raw_variables' => new ParameterBag(array()),
-          );
+            '_raw_variables' => new ParameterBag([]),
+          ];
         }
       }));
 
diff --git a/core/modules/system/tests/src/Unit/Installer/InstallTranslationFilePatternTest.php b/core/modules/system/tests/src/Unit/Installer/InstallTranslationFilePatternTest.php
index fd2b88495e63664bdf8e7abca9bf0c08adab32d3..0dd7510e89aebd428cda57788def3979cdbdc5d7 100644
--- a/core/modules/system/tests/src/Unit/Installer/InstallTranslationFilePatternTest.php
+++ b/core/modules/system/tests/src/Unit/Installer/InstallTranslationFilePatternTest.php
@@ -45,11 +45,11 @@ public function testFilesPatternValid($langcode, $filename) {
    * @return array
    */
   public function providerValidTranslationFiles() {
-    return array(
-      array('hu', 'drupal-8.0.0-alpha1.hu.po'),
-      array('ta', 'drupal-8.10.10-beta12.ta.po'),
-      array('hi', 'drupal-8.0.0.hi.po'),
-    );
+    return [
+      ['hu', 'drupal-8.0.0-alpha1.hu.po'],
+      ['ta', 'drupal-8.10.10-beta12.ta.po'],
+      ['hi', 'drupal-8.0.0.hi.po'],
+    ];
   }
 
   /**
@@ -64,13 +64,13 @@ public function testFilesPatternInvalid($langcode, $filename) {
    * @return array
    */
   public function providerInvalidTranslationFiles() {
-    return array(
-      array('hu', 'drupal-alpha1-*-hu.po'),
-      array('ta', 'drupal-beta12.ta'),
-      array('hi', 'drupal-hi.po'),
-      array('de', 'drupal-dummy-de.po'),
-      array('hu', 'drupal-10.0.1.alpha1-hu.po'),
-    );
+    return [
+      ['hu', 'drupal-alpha1-*-hu.po'],
+      ['ta', 'drupal-beta12.ta'],
+      ['hi', 'drupal-hi.po'],
+      ['de', 'drupal-dummy-de.po'],
+      ['hu', 'drupal-10.0.1.alpha1-hu.po'],
+    ];
   }
 
 }
diff --git a/core/modules/system/tests/src/Unit/Menu/SystemLocalTasksTest.php b/core/modules/system/tests/src/Unit/Menu/SystemLocalTasksTest.php
index 9f0afc62fc286f69f8dc57375f4464980bd64811..c632a3e5530378c171af93acefff00eca8ab8d69 100644
--- a/core/modules/system/tests/src/Unit/Menu/SystemLocalTasksTest.php
+++ b/core/modules/system/tests/src/Unit/Menu/SystemLocalTasksTest.php
@@ -25,20 +25,20 @@ class SystemLocalTasksTest extends LocalTaskIntegrationTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->directoryList = array(
+    $this->directoryList = [
       'system' => 'core/modules/system',
-    );
+    ];
 
     $this->themeHandler = $this->getMock('Drupal\Core\Extension\ThemeHandlerInterface');
 
     $theme = new Extension($this->root, 'theme', '/core/themes/bartik', 'bartik.info.yml');
     $theme->status = 1;
-    $theme->info = array('name' => 'bartik');
+    $theme->info = ['name' => 'bartik'];
     $this->themeHandler->expects($this->any())
       ->method('listInfo')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'bartik' => $theme,
-      )));
+      ]));
     $this->themeHandler->expects($this->any())
       ->method('hasUi')
       ->with('bartik')
@@ -59,13 +59,13 @@ public function testSystemAdminLocalTasks($route, $expected) {
    * Provides a list of routes to test.
    */
   public function getSystemAdminRoutes() {
-    return array(
-      array('system.admin_content', array(array('system.admin_content'))),
-      array('system.theme_settings_theme', array(
-        array('system.themes_page', 'system.theme_settings'),
-        array('system.theme_settings_global', 'system.theme_settings_theme:bartik'),
-      )),
-    );
+    return [
+      ['system.admin_content', [['system.admin_content']]],
+      ['system.theme_settings_theme', [
+        ['system.themes_page', 'system.theme_settings'],
+        ['system.theme_settings_global', 'system.theme_settings_theme:bartik'],
+      ]],
+    ];
   }
 
 }
diff --git a/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php b/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
index 90696fda4e58cb5f9bab9976abee39d05e9cb90f..689c1782abead2dc4cc05ce6db588c22cb5ee8f1 100644
--- a/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
+++ b/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
@@ -53,21 +53,21 @@ protected function setUp() {
    *     - The expected content of the JSONresponse.
    */
   public function providerTestMachineNameController() {
-    $valid_data = array(
-      array(array('text' => 'Bob', 'langcode' => 'en'), '"Bob"'),
-      array(array('text' => 'Bob', 'langcode' => 'en', 'lowercase' => TRUE), '"bob"'),
-      array(array('text' => 'Bob', 'langcode' => 'en', 'replace' => 'Alice', 'replace_pattern' => 'Bob'), '"Alice"'),
-      array(array('text' => 'Bob', 'langcode' => 'en', 'replace' => 'Alice', 'replace_pattern' => 'Tom'), '"Bob"'),
-      array(array('text' => 'Äwesome', 'langcode' => 'en', 'lowercase' => TRUE), '"awesome"'),
-      array(array('text' => 'Äwesome', 'langcode' => 'de', 'lowercase' => TRUE), '"aewesome"'),
+    $valid_data = [
+      [['text' => 'Bob', 'langcode' => 'en'], '"Bob"'],
+      [['text' => 'Bob', 'langcode' => 'en', 'lowercase' => TRUE], '"bob"'],
+      [['text' => 'Bob', 'langcode' => 'en', 'replace' => 'Alice', 'replace_pattern' => 'Bob'], '"Alice"'],
+      [['text' => 'Bob', 'langcode' => 'en', 'replace' => 'Alice', 'replace_pattern' => 'Tom'], '"Bob"'],
+      [['text' => 'Äwesome', 'langcode' => 'en', 'lowercase' => TRUE], '"awesome"'],
+      [['text' => 'Äwesome', 'langcode' => 'de', 'lowercase' => TRUE], '"aewesome"'],
       // Tests special characters replacement in the input text.
-      array(array('text' => 'B?!"@\/-ob@e', 'langcode' => 'en', 'lowercase' => TRUE, 'replace' => '_', 'replace_pattern' => '[^a-z0-9_.]+'), '"b_ob_e"'),
+      [['text' => 'B?!"@\/-ob@e', 'langcode' => 'en', 'lowercase' => TRUE, 'replace' => '_', 'replace_pattern' => '[^a-z0-9_.]+'], '"b_ob_e"'],
       // Tests @ character in the replace_pattern regex.
-      array(array('text' => 'Bob@e\0', 'langcode' => 'en', 'lowercase' => TRUE, 'replace' => '_', 'replace_pattern' => '[^a-z0-9_.@]+'), '"bob@e_0"'),
+      [['text' => 'Bob@e\0', 'langcode' => 'en', 'lowercase' => TRUE, 'replace' => '_', 'replace_pattern' => '[^a-z0-9_.@]+'], '"bob@e_0"'],
       // Tests null byte in the replace_pattern regex.
-      array(array('text' => 'Bob', 'langcode' => 'en', 'lowercase' => TRUE, 'replace' => 'fail()', 'replace_pattern' => ".*@e\0"), '"bob"'),
-      array(array('text' => 'Bob@e', 'langcode' => 'en', 'lowercase' => TRUE, 'replace' => 'fail()', 'replace_pattern' => ".*@e\0"), '"fail()"'),
-    );
+      [['text' => 'Bob', 'langcode' => 'en', 'lowercase' => TRUE, 'replace' => 'fail()', 'replace_pattern' => ".*@e\0"], '"bob"'],
+      [['text' => 'Bob@e', 'langcode' => 'en', 'lowercase' => TRUE, 'replace' => 'fail()', 'replace_pattern' => ".*@e\0"], '"fail()"'],
+    ];
 
     $valid_data = array_map(function ($data) {
       if (isset($data[0]['replace_pattern'])) {
diff --git a/core/modules/system/tests/themes/engines/nyan_cat/nyan_cat.engine b/core/modules/system/tests/themes/engines/nyan_cat/nyan_cat.engine
index 04666dc15d6e1b6991f79b1916b5d161c15f89c5..21cf116da38f2e493b5f7fd258eb3c4275db046a 100644
--- a/core/modules/system/tests/themes/engines/nyan_cat/nyan_cat.engine
+++ b/core/modules/system/tests/themes/engines/nyan_cat/nyan_cat.engine
@@ -21,7 +21,7 @@ function nyan_cat_init(Extension $theme) {
  * Implements hook_theme().
  */
 function nyan_cat_theme($existing, $type, $theme, $path) {
-  $templates = drupal_find_theme_functions($existing, array($theme));
+  $templates = drupal_find_theme_functions($existing, [$theme]);
   $templates += drupal_find_theme_templates($existing, '.nyan-cat.html', $path);
   return $templates;
 }
diff --git a/core/modules/system/tests/themes/test_subtheme/test_subtheme.theme b/core/modules/system/tests/themes/test_subtheme/test_subtheme.theme
index cd312dbcb7d7c21b7ed8d0e34c538b447af0dd99..78333a9abafe72a46b1e86f1e8be349d92576b16 100644
--- a/core/modules/system/tests/themes/test_subtheme/test_subtheme.theme
+++ b/core/modules/system/tests/themes/test_subtheme/test_subtheme.theme
@@ -23,7 +23,7 @@ function test_subtheme_views_post_render(ViewExecutable $view, &$output, CachePl
   // We append the function name to the title for test to check for.
   $view->setTitle($view->getTitle() . ":" . __FUNCTION__);
   if ($view->id() == 'test_page_display') {
-    $output['#rows'][0]['#title'] = t('%total_rows items found.', array('%total_rows' => $view->total_rows));
+    $output['#rows'][0]['#title'] = t('%total_rows items found.', ['%total_rows' => $view->total_rows]);
   }
 }
 
diff --git a/core/modules/taxonomy/src/Controller/TaxonomyController.php b/core/modules/taxonomy/src/Controller/TaxonomyController.php
index 843cdd7a4cef779c6f1e5e1c9449805c7d6fab4b..27b1ec0c86ad88be37e5e27f779206935fd3f98d 100644
--- a/core/modules/taxonomy/src/Controller/TaxonomyController.php
+++ b/core/modules/taxonomy/src/Controller/TaxonomyController.php
@@ -22,7 +22,7 @@ class TaxonomyController extends ControllerBase {
    *   The taxonomy term add form.
    */
   public function addForm(VocabularyInterface $taxonomy_vocabulary) {
-    $term = $this->entityManager()->getStorage('taxonomy_term')->create(array('vid' => $taxonomy_vocabulary->id()));
+    $term = $this->entityManager()->getStorage('taxonomy_term')->create(['vid' => $taxonomy_vocabulary->id()]);
     return $this->entityFormBuilder()->getForm($term);
   }
 
diff --git a/core/modules/taxonomy/src/Entity/Term.php b/core/modules/taxonomy/src/Entity/Term.php
index 7aca19f108ac9ec38d8217e101a5e03dafa129ad..535fa8c425147e9c031723caab82706c3ab8ea16 100644
--- a/core/modules/taxonomy/src/Entity/Term.php
+++ b/core/modules/taxonomy/src/Entity/Term.php
@@ -61,7 +61,7 @@ public static function postDelete(EntityStorageInterface $storage, array $entiti
     parent::postDelete($storage, $entities);
 
     // See if any of the term's children are about to be become orphans.
-    $orphans = array();
+    $orphans = [];
     foreach (array_keys($entities) as $tid) {
       if ($children = $storage->loadChildren($tid)) {
         foreach ($children as $child) {
@@ -92,7 +92,7 @@ public function postSave(EntityStorageInterface $storage, $update = TRUE) {
     // Only change the parents if a value is set, keep the existing values if
     // not.
     if (isset($this->parent->target_id)) {
-      $storage->deleteTermHierarchy(array($this->id()));
+      $storage->deleteTermHierarchy([$this->id()]);
       $storage->updateTermHierarchy($this);
     }
   }
@@ -119,30 +119,30 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setTranslatable(TRUE)
       ->setRequired(TRUE)
       ->setSetting('max_length', 255)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'string',
         'weight' => -5,
-      ))
-      ->setDisplayOptions('form', array(
+      ])
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => -5,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['description'] = BaseFieldDefinition::create('text_long')
       ->setLabel(t('Description'))
       ->setTranslatable(TRUE)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
         'label' => 'hidden',
         'type' => 'text_default',
         'weight' => 0,
-      ))
+      ])
       ->setDisplayConfigurable('view', TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'text_textfield',
         'weight' => 0,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['weight'] = BaseFieldDefinition::create('integer')
diff --git a/core/modules/taxonomy/src/Entity/Vocabulary.php b/core/modules/taxonomy/src/Entity/Vocabulary.php
index a2d7eef8a57373204cb794381e487965a1c9f9c7..b0d1ac13d28e5ee82366877cd3f7575900cf55ab 100644
--- a/core/modules/taxonomy/src/Entity/Vocabulary.php
+++ b/core/modules/taxonomy/src/Entity/Vocabulary.php
@@ -140,13 +140,13 @@ public static function postDelete(EntityStorageInterface $storage, array $entiti
       return;
     }
 
-    $vocabularies = array();
+    $vocabularies = [];
     foreach ($entities as $vocabulary) {
       $vocabularies[$vocabulary->id()] = $vocabulary->id();
     }
     // Load all Taxonomy module fields and delete those which use only this
     // vocabulary.
-    $field_storages = entity_load_multiple_by_properties('field_storage_config', array('module' => 'taxonomy'));
+    $field_storages = entity_load_multiple_by_properties('field_storage_config', ['module' => 'taxonomy']);
     foreach ($field_storages as $field_storage) {
       $modified_storage = FALSE;
       // Term reference fields may reference terms from more than one
diff --git a/core/modules/taxonomy/src/Form/OverviewTerms.php b/core/modules/taxonomy/src/Form/OverviewTerms.php
index 4c8cee3fb74b40d5674bf6943b0eee4786a1a0eb..b5014bbe796e085ab5fac4c626851cb473be1ca4 100644
--- a/core/modules/taxonomy/src/Form/OverviewTerms.php
+++ b/core/modules/taxonomy/src/Form/OverviewTerms.php
@@ -101,10 +101,10 @@ public function buildForm(array $form, FormStateInterface $form_state, Vocabular
     $forward_step = 0;
 
     // An array of the terms to be displayed on this page.
-    $current_page = array();
+    $current_page = [];
 
     $delta = 0;
-    $term_deltas = array();
+    $term_deltas = [];
     $tree = $this->storageController->loadTree($taxonomy_vocabulary->id(), 0, NULL, TRUE);
     $tree_index = 0;
     do {
@@ -199,93 +199,93 @@ public function buildForm(array $form, FormStateInterface $form_state, Vocabular
     $destination = $this->getDestinationArray();
     $row_position = 0;
     // Build the actual form.
-    $form['terms'] = array(
+    $form['terms'] = [
       '#type' => 'table',
-      '#header' => array($this->t('Name'), $this->t('Weight'), $this->t('Operations')),
-      '#empty' => $this->t('No terms available. <a href=":link">Add term</a>.', array(':link' => $this->url('entity.taxonomy_term.add_form', array('taxonomy_vocabulary' => $taxonomy_vocabulary->id())))),
-      '#attributes' => array(
+      '#header' => [$this->t('Name'), $this->t('Weight'), $this->t('Operations')],
+      '#empty' => $this->t('No terms available. <a href=":link">Add term</a>.', [':link' => $this->url('entity.taxonomy_term.add_form', ['taxonomy_vocabulary' => $taxonomy_vocabulary->id()])]),
+      '#attributes' => [
         'id' => 'taxonomy',
-      ),
-    );
+      ],
+    ];
     foreach ($current_page as $key => $term) {
       /** @var $term \Drupal\Core\Entity\EntityInterface */
       $form['terms'][$key]['#term'] = $term;
-      $indentation = array();
+      $indentation = [];
       if (isset($term->depth) && $term->depth > 0) {
-        $indentation = array(
+        $indentation = [
           '#theme' => 'indentation',
           '#size' => $term->depth,
-        );
+        ];
       }
-      $form['terms'][$key]['term'] = array(
+      $form['terms'][$key]['term'] = [
         '#prefix' => !empty($indentation) ? drupal_render($indentation) : '',
         '#type' => 'link',
         '#title' => $term->getName(),
         '#url' => $term->urlInfo(),
-      );
+      ];
       if ($taxonomy_vocabulary->getHierarchy() != VocabularyInterface::HIERARCHY_MULTIPLE && count($tree) > 1) {
         $parent_fields = TRUE;
-        $form['terms'][$key]['term']['tid'] = array(
+        $form['terms'][$key]['term']['tid'] = [
           '#type' => 'hidden',
           '#value' => $term->id(),
-          '#attributes' => array(
-            'class' => array('term-id'),
-          ),
-        );
-        $form['terms'][$key]['term']['parent'] = array(
+          '#attributes' => [
+            'class' => ['term-id'],
+          ],
+        ];
+        $form['terms'][$key]['term']['parent'] = [
           '#type' => 'hidden',
           // Yes, default_value on a hidden. It needs to be changeable by the
           // javascript.
           '#default_value' => $term->parents[0],
-          '#attributes' => array(
-            'class' => array('term-parent'),
-          ),
-        );
-        $form['terms'][$key]['term']['depth'] = array(
+          '#attributes' => [
+            'class' => ['term-parent'],
+          ],
+        ];
+        $form['terms'][$key]['term']['depth'] = [
           '#type' => 'hidden',
           // Same as above, the depth is modified by javascript, so it's a
           // default_value.
           '#default_value' => $term->depth,
-          '#attributes' => array(
-            'class' => array('term-depth'),
-          ),
-        );
+          '#attributes' => [
+            'class' => ['term-depth'],
+          ],
+        ];
       }
-      $form['terms'][$key]['weight'] = array(
+      $form['terms'][$key]['weight'] = [
         '#type' => 'weight',
         '#delta' => $delta,
         '#title' => $this->t('Weight for added term'),
         '#title_display' => 'invisible',
         '#default_value' => $term->getWeight(),
-        '#attributes' => array(
-          'class' => array('term-weight'),
-        ),
-      );
-      $operations = array(
-        'edit' => array(
+        '#attributes' => [
+          'class' => ['term-weight'],
+        ],
+      ];
+      $operations = [
+        'edit' => [
           'title' => $this->t('Edit'),
           'query' => $destination,
           'url' => $term->urlInfo('edit-form'),
-        ),
-        'delete' => array(
+        ],
+        'delete' => [
           'title' => $this->t('Delete'),
           'query' => $destination,
           'url' => $term->urlInfo('delete-form'),
-        ),
-      );
+        ],
+      ];
       if ($this->moduleHandler->moduleExists('content_translation') && content_translation_translate_access($term)->isAllowed()) {
-        $operations['translate'] = array(
+        $operations['translate'] = [
           'title' => $this->t('Translate'),
           'query' => $destination,
           'url' => $term->urlInfo('drupal:content-translation-overview'),
-        );
+        ];
       }
-      $form['terms'][$key]['operations'] = array(
+      $form['terms'][$key]['operations'] = [
         '#type' => 'operations',
         '#links' => $operations,
-      );
+      ];
 
-      $form['terms'][$key]['#attributes']['class'] = array();
+      $form['terms'][$key]['#attributes']['class'] = [];
       if ($parent_fields) {
         $form['terms'][$key]['#attributes']['class'][] = 'draggable';
       }
@@ -314,44 +314,44 @@ public function buildForm(array $form, FormStateInterface $form_state, Vocabular
     }
 
     if ($parent_fields) {
-      $form['terms']['#tabledrag'][] = array(
+      $form['terms']['#tabledrag'][] = [
         'action' => 'match',
         'relationship' => 'parent',
         'group' => 'term-parent',
         'subgroup' => 'term-parent',
         'source' => 'term-id',
         'hidden' => FALSE,
-      );
-      $form['terms']['#tabledrag'][] = array(
+      ];
+      $form['terms']['#tabledrag'][] = [
         'action' => 'depth',
         'relationship' => 'group',
         'group' => 'term-depth',
         'hidden' => FALSE,
-      );
+      ];
       $form['terms']['#attached']['library'][] = 'taxonomy/drupal.taxonomy';
       $form['terms']['#attached']['drupalSettings']['taxonomy'] = [
         'backStep' => $back_step,
         'forwardStep' => $forward_step,
       ];
     }
-    $form['terms']['#tabledrag'][] = array(
+    $form['terms']['#tabledrag'][] = [
       'action' => 'order',
       'relationship' => 'sibling',
       'group' => 'term-weight',
-    );
+    ];
 
     if ($taxonomy_vocabulary->getHierarchy() != VocabularyInterface::HIERARCHY_MULTIPLE && count($tree) > 1) {
-      $form['actions'] = array('#type' => 'actions', '#tree' => FALSE);
-      $form['actions']['submit'] = array(
+      $form['actions'] = ['#type' => 'actions', '#tree' => FALSE];
+      $form['actions']['submit'] = [
         '#type' => 'submit',
         '#value' => $this->t('Save'),
         '#button_type' => 'primary',
-      );
-      $form['actions']['reset_alphabetical'] = array(
+      ];
+      $form['actions']['reset_alphabetical'] = [
         '#type' => 'submit',
-        '#submit' => array('::submitReset'),
+        '#submit' => ['::submitReset'],
         '#value' => $this->t('Reset to alphabetical'),
-      );
+      ];
     }
 
     $form['pager_pager'] = ['#type' => 'pager'];
@@ -378,13 +378,13 @@ public function buildForm(array $form, FormStateInterface $form_state, Vocabular
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     // Sort term order based on weight.
-    uasort($form_state->getValue('terms'), array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
+    uasort($form_state->getValue('terms'), ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
 
     $vocabulary = $form_state->get(['taxonomy', 'vocabulary']);
     // Update the current hierarchy type as we go.
     $hierarchy = VocabularyInterface::HIERARCHY_DISABLED;
 
-    $changed_terms = array();
+    $changed_terms = [];
     $tree = $this->storageController->loadTree($vocabulary->id(), 0, NULL, TRUE);
 
     if (empty($tree)) {
@@ -405,7 +405,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     }
 
     // Renumber the current page weights and assign any new parents.
-    $level_weights = array();
+    $level_weights = [];
     foreach ($form_state->getValue('terms') as $tid => $values) {
       if (isset($form['terms'][$tid]['#term'])) {
         $term = $form['terms'][$tid]['#term'];
diff --git a/core/modules/taxonomy/src/Form/TermDeleteForm.php b/core/modules/taxonomy/src/Form/TermDeleteForm.php
index 22ab19b063c51918696795b87947df2d42ab5213..0e97ff64a4b0a4cba75a6bf87d943dfbcddfbd90 100644
--- a/core/modules/taxonomy/src/Form/TermDeleteForm.php
+++ b/core/modules/taxonomy/src/Form/TermDeleteForm.php
@@ -38,7 +38,7 @@ public function getDescription() {
    * {@inheritdoc}
    */
   protected function getDeletionMessage() {
-    return $this->t('Deleted term %name.', array('%name' => $this->entity->label()));
+    return $this->t('Deleted term %name.', ['%name' => $this->entity->label()]);
   }
 
   /**
@@ -54,7 +54,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $vocabulary = $storage->load($this->entity->bundle());
 
       // @todo Move to storage http://drupal.org/node/1988712
-      taxonomy_check_vocabulary_hierarchy($vocabulary, array('tid' => $term->id()));
+      taxonomy_check_vocabulary_hierarchy($vocabulary, ['tid' => $term->id()]);
     }
   }
 
diff --git a/core/modules/taxonomy/src/Form/VocabularyDeleteForm.php b/core/modules/taxonomy/src/Form/VocabularyDeleteForm.php
index bada5d6eadcfb2e939467a78aeab7420bbbf11a7..7c91b7868cbb0e3c378fadb396a339c07cada464 100644
--- a/core/modules/taxonomy/src/Form/VocabularyDeleteForm.php
+++ b/core/modules/taxonomy/src/Form/VocabularyDeleteForm.php
@@ -20,7 +20,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to delete the vocabulary %title?', array('%title' => $this->entity->label()));
+    return $this->t('Are you sure you want to delete the vocabulary %title?', ['%title' => $this->entity->label()]);
   }
 
   /**
@@ -34,7 +34,7 @@ public function getDescription() {
    * {@inheritdoc}
    */
   protected function getDeletionMessage() {
-    return $this->t('Deleted vocabulary %name.', array('%name' => $this->entity->label()));
+    return $this->t('Deleted vocabulary %name.', ['%name' => $this->entity->label()]);
   }
 
 }
diff --git a/core/modules/taxonomy/src/Form/VocabularyResetForm.php b/core/modules/taxonomy/src/Form/VocabularyResetForm.php
index fb33e358e806de121a9c6dc409956f3995f2b21d..e036ff91768a8b77fa1a37025069e4126dc6c01d 100644
--- a/core/modules/taxonomy/src/Form/VocabularyResetForm.php
+++ b/core/modules/taxonomy/src/Form/VocabularyResetForm.php
@@ -49,7 +49,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Are you sure you want to reset the vocabulary %title to alphabetical order?', array('%title' => $this->entity->label()));
+    return $this->t('Are you sure you want to reset the vocabulary %title to alphabetical order?', ['%title' => $this->entity->label()]);
   }
 
   /**
@@ -80,8 +80,8 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     parent::submitForm($form, $form_state);
     $this->termStorage->resetWeights($this->entity->id());
 
-    drupal_set_message($this->t('Reset vocabulary %name to alphabetical order.', array('%name' => $this->entity->label())));
-    $this->logger('taxonomy')->notice('Reset vocabulary %name to alphabetical order.', array('%name' => $this->entity->label()));
+    drupal_set_message($this->t('Reset vocabulary %name to alphabetical order.', ['%name' => $this->entity->label()]));
+    $this->logger('taxonomy')->notice('Reset vocabulary %name to alphabetical order.', ['%name' => $this->entity->label()]);
     $form_state->setRedirectUrl($this->getCancelUrl());
   }
 
diff --git a/core/modules/taxonomy/src/Plugin/EntityReferenceSelection/TermSelection.php b/core/modules/taxonomy/src/Plugin/EntityReferenceSelection/TermSelection.php
index 7dd4aa2d6e57d68e85c4c5b6b6d8a414b2677d67..b8f4d14fbe1d334b7fcbf8315998f37715b25ae8 100644
--- a/core/modules/taxonomy/src/Plugin/EntityReferenceSelection/TermSelection.php
+++ b/core/modules/taxonomy/src/Plugin/EntityReferenceSelection/TermSelection.php
@@ -53,7 +53,7 @@ public function getReferenceableEntities($match = NULL, $match_operator = 'CONTA
       return parent::getReferenceableEntities($match, $match_operator, $limit);
     }
 
-    $options = array();
+    $options = [];
 
     $bundles = $this->entityManager->getBundleInfo('taxonomy_term');
     $handler_settings = $this->configuration['handler_settings'];
diff --git a/core/modules/taxonomy/src/Plugin/Field/FieldFormatter/EntityReferenceTaxonomyTermRssFormatter.php b/core/modules/taxonomy/src/Plugin/Field/FieldFormatter/EntityReferenceTaxonomyTermRssFormatter.php
index 11e8325797afede057b51f47d97b78d3489fac3b..0d0d9170b577178456b04c3c110220e862e80931 100644
--- a/core/modules/taxonomy/src/Plugin/Field/FieldFormatter/EntityReferenceTaxonomyTermRssFormatter.php
+++ b/core/modules/taxonomy/src/Plugin/Field/FieldFormatter/EntityReferenceTaxonomyTermRssFormatter.php
@@ -25,16 +25,16 @@ class EntityReferenceTaxonomyTermRssFormatter extends EntityReferenceFormatterBa
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
     $parent_entity = $items->getEntity();
-    $elements = array();
+    $elements = [];
 
     foreach ($this->getEntitiesToView($items, $langcode) as $delta => $entity) {
-      $parent_entity->rss_elements[] = array(
+      $parent_entity->rss_elements[] = [
         'key' => 'category',
         'value' => $entity->label(),
-        'attributes' => array(
-          'domain' => $entity->id() ? \Drupal::url('entity.taxonomy_term.canonical', ['taxonomy_term' => $entity->id()], array('absolute' => TRUE)) : '',
-        ),
-      );
+        'attributes' => [
+          'domain' => $entity->id() ? \Drupal::url('entity.taxonomy_term.canonical', ['taxonomy_term' => $entity->id()], ['absolute' => TRUE]) : '',
+        ],
+      ];
     }
 
     return $elements;
diff --git a/core/modules/taxonomy/src/Plugin/migrate/cckfield/TaxonomyTermReference.php b/core/modules/taxonomy/src/Plugin/migrate/cckfield/TaxonomyTermReference.php
index c3035c4312e03b0f7eab6ac6e2106d5c03a0d551..2d4e719d36e2c84d1da1165b84bb2118177a4452 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/cckfield/TaxonomyTermReference.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/cckfield/TaxonomyTermReference.php
@@ -20,20 +20,20 @@ class TaxonomyTermReference extends CckFieldPluginBase {
    * {@inheritdoc}
    */
   public function getFieldFormatterMap() {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function processCckFieldValues(MigrationInterface $migration, $field_name, $data) {
-    $process = array(
+    $process = [
       'plugin' => 'iterator',
       'source' => $field_name,
-      'process' => array(
+      'process' => [
         'target_id' => 'tid',
-      ),
-    );
+      ],
+    ];
     $migration->setProcessOfProperty($field_name, $process);
   }
 
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/Term.php b/core/modules/taxonomy/src/Plugin/migrate/source/Term.php
index ce468a29dd79366547a93358b0785c0886b2cef0..545d205ba9fe46278c76aebe791dd293f1e9837a 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/source/Term.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/source/Term.php
@@ -64,14 +64,14 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'tid' => $this->t('The term ID.'),
       'vid' => $this->t('Existing term VID'),
       'name' => $this->t('The name of the term.'),
       'description' => $this->t('The term description.'),
       'weight' => $this->t('Weight'),
       'parent' => $this->t("The Drupal term IDs of the term's parents."),
-    );
+    ];
     if ($this->getModuleSchemaVersion('taxonomy') >= 7000) {
       $fields['format'] = $this->t('Format of the term description.');
     }
@@ -84,7 +84,7 @@ public function fields() {
   public function prepareRow(Row $row) {
     // Find parents for this row.
     $parents = $this->select($this->termHierarchyTable, 'th')
-      ->fields('th', array('parent', 'tid'))
+      ->fields('th', ['parent', 'tid'])
       ->condition('tid', $row->getSourceProperty('tid'))
       ->execute()
       ->fetchCol();
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/d6/TermNode.php b/core/modules/taxonomy/src/Plugin/migrate/source/d6/TermNode.php
index 2635aaa7084cd5c848b120aa316172ea186b8edf..2b1c806f2b2be49085d6a2885fa8d02a448e8974 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/source/d6/TermNode.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/source/d6/TermNode.php
@@ -26,10 +26,10 @@ class TermNode extends DrupalSqlBase {
   public function query() {
     $query = $this->select('term_node', 'tn')
       ->distinct()
-      ->fields('tn', array('nid', 'vid'))
-      ->fields('n', array('type'));
+      ->fields('tn', ['nid', 'vid'])
+      ->fields('n', ['type']);
     // Because this is an inner join it enforces the current revision.
-    $query->innerJoin('term_data', 'td', 'td.tid = tn.tid AND td.vid = :vid', array(':vid' => $this->configuration['vid']));
+    $query->innerJoin('term_data', 'td', 'td.tid = tn.tid AND td.vid = :vid', [':vid' => $this->configuration['vid']]);
     $query->innerJoin('node', 'n', static::JOIN);
     return $query;
   }
@@ -38,11 +38,11 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'nid' => $this->t('The node revision ID.'),
       'vid' => $this->t('The node revision ID.'),
       'tid' => $this->t('The term ID.'),
-    );
+    ];
   }
 
   /**
@@ -51,10 +51,10 @@ public function fields() {
   public function prepareRow(Row $row) {
     // Select the terms belonging to the revision selected.
     $query = $this->select('term_node', 'tn')
-      ->fields('tn', array('tid'))
+      ->fields('tn', ['tid'])
       ->condition('n.nid', $row->getSourceProperty('nid'));
     $query->join('node', 'n', static::JOIN);
-    $query->innerJoin('term_data', 'td', 'td.tid = tn.tid AND td.vid = :vid', array(':vid' => $this->configuration['vid']));
+    $query->innerJoin('term_data', 'td', 'td.tid = tn.tid AND td.vid = :vid', [':vid' => $this->configuration['vid']]);
     $row->setSourceProperty('tid', $query->execute()->fetchCol());
     return parent::prepareRow($row);
   }
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/d6/Vocabulary.php b/core/modules/taxonomy/src/Plugin/migrate/source/d6/Vocabulary.php
index 2573033889c01916febed6161593329cd3e850d0..714fa933104a3f51a8c361faab69aabe1f515cb4 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/source/d6/Vocabulary.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/source/d6/Vocabulary.php
@@ -21,7 +21,7 @@ class Vocabulary extends DrupalSqlBase {
    */
   public function query() {
     $query = $this->select('vocabulary', 'v')
-      ->fields('v', array(
+      ->fields('v', [
         'vid',
         'name',
         'description',
@@ -33,7 +33,7 @@ public function query() {
         'tags',
         'module',
         'weight',
-      ));
+      ]);
     return $query;
   }
 
@@ -41,7 +41,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'vid' => $this->t('The vocabulary ID.'),
       'name' => $this->t('The name of the vocabulary.'),
       'description' => $this->t('The description of the vocabulary.'),
@@ -54,7 +54,7 @@ public function fields() {
       'weight' => $this->t('The weight of the vocabulary in relation to other vocabularies.'),
       'parents' => $this->t("The Drupal term IDs of the term's parents."),
       'node_types' => $this->t('The names of the node types the vocabulary may be used with.'),
-    );
+    ];
   }
 
   /**
@@ -63,7 +63,7 @@ public function fields() {
   public function prepareRow(Row $row) {
     // Find node types for this row.
     $node_types = $this->select('vocabulary_node_types', 'nt')
-      ->fields('nt', array('type', 'vid'))
+      ->fields('nt', ['type', 'vid'])
       ->condition('vid', $row->getSourceProperty('vid'))
       ->execute()
       ->fetchCol();
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/d6/VocabularyPerType.php b/core/modules/taxonomy/src/Plugin/migrate/source/d6/VocabularyPerType.php
index ac7a2fe1cc88a4544cbd278443c8e073475ea364..40a0094afe2d63d5ced6484f00befa3c2018fb63 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/source/d6/VocabularyPerType.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/source/d6/VocabularyPerType.php
@@ -18,7 +18,7 @@ class VocabularyPerType extends Vocabulary {
   public function query() {
     $query = parent::query();
     $query->join('vocabulary_node_types', 'nt', 'v.vid = nt.vid');
-    $query->fields('nt', array('type'));
+    $query->fields('nt', ['type']);
     return $query;
   }
 
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/d7/Vocabulary.php b/core/modules/taxonomy/src/Plugin/migrate/source/d7/Vocabulary.php
index e9eb4aa44763c75c0be873d658292d5b99c63b25..31103a8be13321b4f3378cf4e2acdfa30706f4d4 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/source/d7/Vocabulary.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/source/d7/Vocabulary.php
@@ -19,7 +19,7 @@ class Vocabulary extends DrupalSqlBase {
    */
   public function query() {
     $query = $this->select('taxonomy_vocabulary', 'v')
-      ->fields('v', array(
+      ->fields('v', [
         'vid',
         'name',
         'description',
@@ -27,7 +27,7 @@ public function query() {
         'module',
         'weight',
         'machine_name',
-      ));
+      ]);
     return $query;
   }
 
@@ -35,7 +35,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'vid' => $this->t('The vocabulary ID.'),
       'name' => $this->t('The name of the vocabulary.'),
       'description' => $this->t('The description of the vocabulary.'),
@@ -43,7 +43,7 @@ public function fields() {
       'module' => $this->t('Module responsible for the vocabulary.'),
       'weight' => $this->t('The weight of the vocabulary in relation to other vocabularies.'),
       'machine_name' => $this->t('Unique machine name of the vocabulary.')
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/taxonomy/src/Plugin/views/argument/IndexTid.php b/core/modules/taxonomy/src/Plugin/views/argument/IndexTid.php
index 8ab40e3e66862d5e6669c88be92e73c250edcc91..8d1854533255493c7b001ea00f7ad6bae126fed2 100644
--- a/core/modules/taxonomy/src/Plugin/views/argument/IndexTid.php
+++ b/core/modules/taxonomy/src/Plugin/views/argument/IndexTid.php
@@ -15,7 +15,7 @@
 class IndexTid extends ManyToOne {
 
   public function titleQuery() {
-    $titles = array();
+    $titles = [];
     $terms = Term::loadMultiple($this->value);
     foreach ($terms as $term) {
       $titles[] = \Drupal::entityManager()->getTranslationFromContext($term)->label();
diff --git a/core/modules/taxonomy/src/Plugin/views/argument/IndexTidDepth.php b/core/modules/taxonomy/src/Plugin/views/argument/IndexTidDepth.php
index 97ee5952d9c3df1afdb8a8e19fb752550ffed50f..a41b8012362ea74f1c3f68be3e516bd027e8ad03 100644
--- a/core/modules/taxonomy/src/Plugin/views/argument/IndexTidDepth.php
+++ b/core/modules/taxonomy/src/Plugin/views/argument/IndexTidDepth.php
@@ -45,27 +45,27 @@ public static function create(ContainerInterface $container, array $configuratio
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['depth'] = array('default' => 0);
-    $options['break_phrase'] = array('default' => FALSE);
-    $options['use_taxonomy_term_path'] = array('default' => FALSE);
+    $options['depth'] = ['default' => 0];
+    $options['break_phrase'] = ['default' => FALSE];
+    $options['use_taxonomy_term_path'] = ['default' => FALSE];
 
     return $options;
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['depth'] = array(
+    $form['depth'] = [
       '#type' => 'weight',
       '#title' => $this->t('Depth'),
       '#default_value' => $this->options['depth'],
       '#description' => $this->t('The depth will match nodes tagged with terms in the hierarchy. For example, if you have the term "fruit" and a child term "apple", with a depth of 1 (or higher) then filtering for the term "fruit" will get nodes that are tagged with "apple" as well as "fruit". If negative, the reverse is true; searching for "apple" will also pick up nodes tagged with "fruit" if depth is -1 (or lower).'),
-    );
+    ];
 
-    $form['break_phrase'] = array(
+    $form['break_phrase'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow multiple values'),
       '#description' => $this->t('If selected, users can enter multiple values in the form of 1+2+3. Due to the number of JOINs it would require, AND will be treated as OR with this filter.'),
       '#default_value' => !empty($this->options['break_phrase']),
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
@@ -75,7 +75,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    */
   protected function defaultActions($which = NULL) {
     if ($which) {
-      if (in_array($which, array('ignore', 'not found', 'empty', 'default'))) {
+      if (in_array($which, ['ignore', 'not found', 'empty', 'default'])) {
         return parent::defaultActions($which);
       }
       return;
@@ -93,7 +93,7 @@ public function query($group_by = FALSE) {
 
     if (!empty($this->options['break_phrase'])) {
       $break = static::breakString($this->argument);
-      if ($break->value === array(-1)) {
+      if ($break->value === [-1]) {
         return FALSE;
       }
 
diff --git a/core/modules/taxonomy/src/Plugin/views/argument_default/Tid.php b/core/modules/taxonomy/src/Plugin/views/argument_default/Tid.php
index 33517b15aa18dd856b59ce963b46ff354ca38cf8..fa1865474ab26939efbada84b11ab9e2409e4d1d 100644
--- a/core/modules/taxonomy/src/Plugin/views/argument_default/Tid.php
+++ b/core/modules/taxonomy/src/Plugin/views/argument_default/Tid.php
@@ -96,11 +96,11 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['term_page'] = array('default' => TRUE);
-    $options['node'] = array('default' => FALSE);
-    $options['anyall'] = array('default' => ',');
-    $options['limit'] = array('default' => FALSE);
-    $options['vids'] = array('default' => array());
+    $options['term_page'] = ['default' => TRUE];
+    $options['node'] = ['default' => FALSE];
+    $options['anyall'] = ['default' => ','];
+    $options['limit'] = ['default' => FALSE];
+    $options['vids'] = ['default' => []];
 
     return $options;
   }
@@ -109,67 +109,67 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['term_page'] = array(
+    $form['term_page'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Load default filter from term page'),
       '#default_value' => $this->options['term_page'],
-    );
-    $form['node'] = array(
+    ];
+    $form['node'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Load default filter from node page, that\'s good for related taxonomy blocks'),
       '#default_value' => $this->options['node'],
-    );
+    ];
 
-    $form['limit'] = array(
+    $form['limit'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Limit terms by vocabulary'),
       '#default_value' => $this->options['limit'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[argument_default][taxonomy_tid][node]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-
-    $options = array();
+      '#states' => [
+        'visible' => [
+          ':input[name="options[argument_default][taxonomy_tid][node]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+
+    $options = [];
     $vocabularies = $this->vocabularyStorage->loadMultiple();
     foreach ($vocabularies as $voc) {
       $options[$voc->id()] = $voc->label();
     }
 
-    $form['vids'] = array(
+    $form['vids'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Vocabularies'),
       '#options' => $options,
       '#default_value' => $this->options['vids'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[argument_default][taxonomy_tid][limit]"]' => array('checked' => TRUE),
-          ':input[name="options[argument_default][taxonomy_tid][node]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-
-    $form['anyall'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="options[argument_default][taxonomy_tid][limit]"]' => ['checked' => TRUE],
+          ':input[name="options[argument_default][taxonomy_tid][node]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+
+    $form['anyall'] = [
       '#type' => 'radios',
       '#title' => $this->t('Multiple-value handling'),
       '#default_value' => $this->options['anyall'],
-      '#options' => array(
+      '#options' => [
         ',' => $this->t('Filter to items that share all terms'),
         '+' => $this->t('Filter to items that share any term'),
-      ),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[argument_default][taxonomy_tid][node]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      ],
+      '#states' => [
+        'visible' => [
+          ':input[name="options[argument_default][taxonomy_tid][node]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = array()) {
+  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = []) {
     // Filter unselected items so we don't unnecessarily store giant arrays.
     $options['vids'] = array_filter($options['vids']);
   }
@@ -188,7 +188,7 @@ public function getArgument() {
     if (!empty($this->options['node'])) {
       // Just check, if a node could be detected.
       if (($node = $this->routeMatch->getParameter('node')) && $node instanceof NodeInterface) {
-        $taxonomy = array();
+        $taxonomy = [];
         foreach ($node->getFieldDefinitions() as $field) {
           if ($field->getType() == 'entity_reference' && $field->getSetting('target_type') == 'taxonomy_term') {
             $taxonomy_terms = $node->{$field->getName()}->referencedEntities();
@@ -199,7 +199,7 @@ public function getArgument() {
           }
         }
         if (!empty($this->options['limit'])) {
-          $tids = array();
+          $tids = [];
           // filter by vocabulary
           foreach ($taxonomy as $tid => $vocab) {
             if (!empty($this->options['vids'][$vocab])) {
diff --git a/core/modules/taxonomy/src/Plugin/views/argument_validator/TermName.php b/core/modules/taxonomy/src/Plugin/views/argument_validator/TermName.php
index eb30ff5fe99fd0e6f46265bb88d8ae9aa8cc056f..ac7bad0fad7f41f655dbc978c0d4a305d310084f 100644
--- a/core/modules/taxonomy/src/Plugin/views/argument_validator/TermName.php
+++ b/core/modules/taxonomy/src/Plugin/views/argument_validator/TermName.php
@@ -39,7 +39,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['transform'] = array('default' => FALSE);
+    $options['transform'] = ['default' => FALSE];
 
     return $options;
   }
@@ -50,11 +50,11 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['transform'] = array(
+    $form['transform'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Transform dashes in URL to spaces in term name filter values'),
       '#default_value' => $this->options['transform'],
-    );
+    ];
   }
 
   /**
@@ -64,7 +64,7 @@ public function validateArgument($argument) {
     if ($this->options['transform']) {
       $argument = str_replace('-', ' ', $argument);
     }
-    $terms = $this->termStorage->loadByProperties(array('name' => $argument));
+    $terms = $this->termStorage->loadByProperties(['name' => $argument]);
 
     if (!$terms) {
       // Returned empty array no terms with the name.
diff --git a/core/modules/taxonomy/src/Plugin/views/field/TaxonomyIndexTid.php b/core/modules/taxonomy/src/Plugin/views/field/TaxonomyIndexTid.php
index f33421a9f2fe88dbf30f6b1db51c915f1c891c1f..1bab4461844337fc4d588b162caafecd1eb7f1e2 100644
--- a/core/modules/taxonomy/src/Plugin/views/field/TaxonomyIndexTid.php
+++ b/core/modules/taxonomy/src/Plugin/views/field/TaxonomyIndexTid.php
@@ -62,19 +62,19 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
     // @todo: Wouldn't it be possible to use $this->base_table and no if here?
     if ($view->storage->get('base_table') == 'node_field_revision') {
-      $this->additional_fields['nid'] = array('table' => 'node_field_revision', 'field' => 'nid');
+      $this->additional_fields['nid'] = ['table' => 'node_field_revision', 'field' => 'nid'];
     }
     else {
-      $this->additional_fields['nid'] = array('table' => 'node_field_data', 'field' => 'nid');
+      $this->additional_fields['nid'] = ['table' => 'node_field_data', 'field' => 'nid'];
     }
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['link_to_taxonomy'] = array('default' => TRUE);
-    $options['limit'] = array('default' => FALSE);
-    $options['vids'] = array('default' => array());
+    $options['link_to_taxonomy'] = ['default' => TRUE];
+    $options['limit'] = ['default' => FALSE];
+    $options['vids'] = ['default' => []];
 
     return $options;
   }
@@ -83,36 +83,36 @@ protected function defineOptions() {
    * Provide "link to term" option.
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['link_to_taxonomy'] = array(
+    $form['link_to_taxonomy'] = [
       '#title' => $this->t('Link this field to its term page'),
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['link_to_taxonomy']),
-    );
+    ];
 
-    $form['limit'] = array(
+    $form['limit'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Limit terms by vocabulary'),
       '#default_value' => $this->options['limit'],
-    );
+    ];
 
-    $options = array();
+    $options = [];
     $vocabularies = $this->vocabularyStorage->loadMultiple();
     foreach ($vocabularies as $voc) {
       $options[$voc->id()] = $voc->label();
     }
 
-    $form['vids'] = array(
+    $form['vids'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Vocabularies'),
       '#options' => $options,
       '#default_value' => $this->options['vids'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[limit]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[limit]"]' => ['checked' => TRUE],
+        ],
+      ],
 
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
@@ -127,7 +127,7 @@ public function query() {
   public function preRender(&$values) {
     $vocabularies = $this->vocabularyStorage->loadMultiple();
     $this->field_alias = $this->aliases['nid'];
-    $nids = array();
+    $nids = [];
     foreach ($values as $result) {
       if (!empty($result->{$this->aliases['nid']})) {
         $nids[] = $result->{$this->aliases['nid']};
@@ -137,7 +137,7 @@ public function preRender(&$values) {
     if ($nids) {
       $vocabs = array_filter($this->options['vids']);
       if (empty($this->options['limit'])) {
-        $vocabs = array();
+        $vocabs = [];
       }
       $result = \Drupal::entityManager()->getStorage('taxonomy_term')->getNodeTerms($nids, $vocabs);
 
@@ -169,7 +169,7 @@ protected function documentSelfTokens(&$tokens) {
   }
 
   protected function addSelfTokens(&$tokens, $item) {
-    foreach (array('tid', 'name', 'vocabulary_vid', 'vocabulary') as $token) {
+    foreach (['tid', 'name', 'vocabulary_vid', 'vocabulary'] as $token) {
       $tokens['{{ ' . $this->options['id'] . '__' . $token . ' }}'] = isset($item[$token]) ? $item[$token] : '';
     }
   }
diff --git a/core/modules/taxonomy/src/Plugin/views/field/TermName.php b/core/modules/taxonomy/src/Plugin/views/field/TermName.php
index 2fcd5299a77c7f535fcdb5b25f3d81f897b37e41..0a777e9c1cfe0a79ca4051e4c8087a85329e4288 100644
--- a/core/modules/taxonomy/src/Plugin/views/field/TermName.php
+++ b/core/modules/taxonomy/src/Plugin/views/field/TermName.php
@@ -37,7 +37,7 @@ public function getItems(ResultRow $values) {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['convert_spaces'] = array('default' => FALSE);
+    $options['convert_spaces'] = ['default' => FALSE];
     return $options;
   }
 
@@ -45,11 +45,11 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['convert_spaces'] = array(
+    $form['convert_spaces'] = [
       '#title' => $this->t('Convert spaces in term names to hyphens'),
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['convert_spaces']),
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
diff --git a/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
index d769bb04d64316fa19bb90a79eafaf03b1665839..a68c3c8c6cea116782de9916b1e9a028f8109046 100644
--- a/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
+++ b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
@@ -94,18 +94,18 @@ public function getValueOptions() {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['type'] = array('default' => 'textfield');
-    $options['limit'] = array('default' => TRUE);
-    $options['vid'] = array('default' => '');
-    $options['hierarchy'] = array('default' => FALSE);
-    $options['error_message'] = array('default' => TRUE);
+    $options['type'] = ['default' => 'textfield'];
+    $options['limit'] = ['default' => TRUE];
+    $options['vid'] = ['default' => ''];
+    $options['hierarchy'] = ['default' => FALSE];
+    $options['error_message'] = ['default' => TRUE];
 
     return $options;
   }
 
   public function buildExtraOptionsForm(&$form, FormStateInterface $form_state) {
     $vocabularies = $this->vocabularyStorage->loadMultiple();
-    $options = array();
+    $options = [];
     foreach ($vocabularies as $voc) {
       $options[$voc->id()] = $voc->label();
     }
@@ -118,56 +118,56 @@ public function buildExtraOptionsForm(&$form, FormStateInterface $form_state) {
       }
 
       if (empty($this->definition['vocabulary'])) {
-        $form['vid'] = array(
+        $form['vid'] = [
           '#type' => 'radios',
           '#title' => $this->t('Vocabulary'),
           '#options' => $options,
           '#description' => $this->t('Select which vocabulary to show terms for in the regular options.'),
           '#default_value' => $this->options['vid'],
-        );
+        ];
       }
     }
 
-    $form['type'] = array(
+    $form['type'] = [
       '#type' => 'radios',
       '#title' => $this->t('Selection type'),
-      '#options' => array('select' => $this->t('Dropdown'), 'textfield' => $this->t('Autocomplete')),
+      '#options' => ['select' => $this->t('Dropdown'), 'textfield' => $this->t('Autocomplete')],
       '#default_value' => $this->options['type'],
-    );
+    ];
 
-    $form['hierarchy'] = array(
+    $form['hierarchy'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Show hierarchy in dropdown'),
       '#default_value' => !empty($this->options['hierarchy']),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[type]"]' => array('value' => 'select'),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="options[type]"]' => ['value' => 'select'],
+        ],
+      ],
+    ];
   }
 
   protected function valueForm(&$form, FormStateInterface $form_state) {
     $vocabulary = $this->vocabularyStorage->load($this->options['vid']);
     if (empty($vocabulary) && $this->options['limit']) {
-      $form['markup'] = array(
+      $form['markup'] = [
         '#markup' => '<div class="js-form-item form-item">' . $this->t('An invalid vocabulary is selected. Please change it in the options.') . '</div>',
-      );
+      ];
       return;
     }
 
     if ($this->options['type'] == 'textfield') {
-      $terms = $this->value ? Term::loadMultiple(($this->value)) : array();
-      $form['value'] = array(
-        '#title' => $this->options['limit'] ? $this->t('Select terms from vocabulary @voc', array('@voc' => $vocabulary->label())) : $this->t('Select terms'),
+      $terms = $this->value ? Term::loadMultiple(($this->value)) : [];
+      $form['value'] = [
+        '#title' => $this->options['limit'] ? $this->t('Select terms from vocabulary @voc', ['@voc' => $vocabulary->label()]) : $this->t('Select terms'),
         '#type' => 'textfield',
         '#default_value' => EntityAutocomplete::getEntityLabels($terms),
-      );
+      ];
 
       if ($this->options['limit']) {
         $form['value']['#type'] = 'entity_autocomplete';
         $form['value']['#target_type'] = 'taxonomy_term';
-        $form['value']['#selection_settings']['target_bundles'] = array($vocabulary->id());
+        $form['value']['#selection_settings']['target_bundles'] = [$vocabulary->id()];
         $form['value']['#tags'] = TRUE;
         $form['value']['#process_default_value'] = FALSE;
       }
@@ -175,18 +175,18 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
     else {
       if (!empty($this->options['hierarchy']) && $this->options['limit']) {
         $tree = $this->termStorage->loadTree($vocabulary->id(), 0, NULL, TRUE);
-        $options = array();
+        $options = [];
 
         if ($tree) {
           foreach ($tree as $term) {
             $choice = new \stdClass();
-            $choice->option = array($term->id() => str_repeat('-', $term->depth) . \Drupal::entityManager()->getTranslationFromContext($term)->label());
+            $choice->option = [$term->id() => str_repeat('-', $term->depth) . \Drupal::entityManager()->getTranslationFromContext($term)->label()];
             $options[] = $choice;
           }
         }
       }
       else {
-        $options = array();
+        $options = [];
         $query = \Drupal::entityQuery('taxonomy_term')
           // @todo Sorting on vocabulary properties -
           //   https://www.drupal.org/node/1821274.
@@ -211,7 +211,7 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
           $options = $this->reduceValueOptions($options);
 
           if (!empty($this->options['expose']['multiple']) && empty($this->options['expose']['required'])) {
-            $default_value = array();
+            $default_value = [];
           }
         }
 
@@ -225,7 +225,7 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
           }
           // Due to #1464174 there is a chance that array('') was saved in the admin ui.
           // Let's choose a safe default value.
-          elseif ($default_value == array('')) {
+          elseif ($default_value == ['']) {
             $default_value = 'All';
           }
           else {
@@ -234,14 +234,14 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
           }
         }
       }
-      $form['value'] = array(
+      $form['value'] = [
         '#type' => 'select',
-        '#title' => $this->options['limit'] ? $this->t('Select terms from vocabulary @voc', array('@voc' => $vocabulary->label())) : $this->t('Select terms'),
+        '#title' => $this->options['limit'] ? $this->t('Select terms from vocabulary @voc', ['@voc' => $vocabulary->label()]) : $this->t('Select terms'),
         '#multiple' => TRUE,
         '#options' => $options,
         '#size' => min(9, count($options)),
         '#default_value' => $default_value,
-      );
+      ];
 
       $user_input = $form_state->getUserInput();
       if ($exposed && isset($identifier) && !isset($user_input[$identifier])) {
@@ -265,13 +265,13 @@ protected function valueValidate($form, FormStateInterface $form_state) {
       return;
     }
 
-    $tids = array();
-    if ($values = $form_state->getValue(array('options', 'value'))) {
+    $tids = [];
+    if ($values = $form_state->getValue(['options', 'value'])) {
       foreach ($values as $value) {
         $tids[] = $value['target_id'];
       }
     }
-    $form_state->setValue(array('options', 'value'), $tids);
+    $form_state->setValue(['options', 'value'], $tids);
   }
 
   public function acceptExposedInput($input) {
@@ -348,16 +348,16 @@ public function buildExposeForm(&$form, FormStateInterface $form_state) {
     if ($this->options['type'] != 'select') {
       unset($form['expose']['reduce']);
     }
-    $form['error_message'] = array(
+    $form['error_message'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Display error message'),
       '#default_value' => !empty($this->options['error_message']),
-    );
+    ];
   }
 
   public function adminSummary() {
     // set up $this->valueOptions for the parent summary
-    $this->valueOptions = array();
+    $this->valueOptions = [];
 
     if ($this->value) {
       $this->value = array_filter($this->value);
diff --git a/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTidDepth.php b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTidDepth.php
index ecd32eb80e88f7ed0ef3e2dd67d1b16952678c5a..93115584c8cb43a1f71210f28aadbe69686acb76 100644
--- a/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTidDepth.php
+++ b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTidDepth.php
@@ -18,15 +18,15 @@
 class TaxonomyIndexTidDepth extends TaxonomyIndexTid {
 
   public function operatorOptions($which = 'title') {
-    return array(
+    return [
       'or' => $this->t('Is one of'),
-    );
+    ];
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['depth'] = array('default' => 0);
+    $options['depth'] = ['default' => 0];
 
     return $options;
   }
@@ -34,12 +34,12 @@ protected function defineOptions() {
   public function buildExtraOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildExtraOptionsForm($form, $form_state);
 
-    $form['depth'] = array(
+    $form['depth'] = [
       '#type' => 'weight',
       '#title' => $this->t('Depth'),
       '#default_value' => $this->options['depth'],
       '#description' => $this->t('The depth will match nodes tagged with terms in the hierarchy. For example, if you have the term "fruit" and a child term "apple", with a depth of 1 (or higher) then filtering for the term "fruit" will get nodes that are tagged with "apple" as well as "fruit". If negative, the reverse is true; searching for "apple" will also pick up nodes tagged with "fruit" if depth is -1 (or lower).'),
-    );
+    ];
   }
 
   public function query() {
diff --git a/core/modules/taxonomy/src/Plugin/views/relationship/NodeTermData.php b/core/modules/taxonomy/src/Plugin/views/relationship/NodeTermData.php
index b1c72e4bdeccfed43c0696daecb798556a5ee065..13fd056aba3e3f7b75190bc711ba8b519d31c0ef 100644
--- a/core/modules/taxonomy/src/Plugin/views/relationship/NodeTermData.php
+++ b/core/modules/taxonomy/src/Plugin/views/relationship/NodeTermData.php
@@ -74,24 +74,24 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['vids'] = array('default' => array());
+    $options['vids'] = ['default' => []];
     return $options;
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     $vocabularies = $this->vocabularyStorage->loadMultiple();
-    $options = array();
+    $options = [];
     foreach ($vocabularies as $voc) {
       $options[$voc->id()] = $voc->label();
     }
 
-    $form['vids'] = array(
+    $form['vids'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Vocabularies'),
       '#options' => $options,
       '#default_value' => $this->options['vids'],
       '#description' => $this->t('Choose which vocabularies you wish to relate. Remember that every term found will create a new record, so this relationship is best used on just one vocabulary that has only one term per node.'),
-    );
+    ];
     parent::buildOptionsForm($form, $form_state);
   }
 
@@ -134,7 +134,7 @@ public function query() {
       $query->condition('td.vid', array_filter($this->options['vids']), 'IN');
       $query->addTag('taxonomy_term_access');
       $query->fields('td');
-      $query->fields('tn', array('nid'));
+      $query->fields('tn', ['nid']);
       $def['table formula'] = $query;
     }
 
diff --git a/core/modules/taxonomy/src/TermBreadcrumbBuilder.php b/core/modules/taxonomy/src/TermBreadcrumbBuilder.php
index 838011d7b6bcb38da7d2c852ed5f4b16fe270338..73588d1f04649203b5e479e3cacd93a5b70fbbf9 100644
--- a/core/modules/taxonomy/src/TermBreadcrumbBuilder.php
+++ b/core/modules/taxonomy/src/TermBreadcrumbBuilder.php
@@ -68,7 +68,7 @@ public function build(RouteMatchInterface $route_match) {
     foreach (array_reverse($parents) as $term) {
       $term = $this->entityManager->getTranslationFromContext($term);
       $breadcrumb->addCacheableDependency($term);
-      $breadcrumb->addLink(Link::createFromRoute($term->getName(), 'entity.taxonomy_term.canonical', array('taxonomy_term' => $term->id())));
+      $breadcrumb->addLink(Link::createFromRoute($term->getName(), 'entity.taxonomy_term.canonical', ['taxonomy_term' => $term->id()]));
     }
 
     // This breadcrumb builder is based on a route parameter, and hence it
diff --git a/core/modules/taxonomy/src/TermForm.php b/core/modules/taxonomy/src/TermForm.php
index 1f56351323f893a23224f97e60f4758d8727345b..6e307ca35a0156b6e71b14ce7162935e5033e6de 100644
--- a/core/modules/taxonomy/src/TermForm.php
+++ b/core/modules/taxonomy/src/TermForm.php
@@ -23,12 +23,12 @@ public function form(array $form, FormStateInterface $form_state) {
     $form_state->set(['taxonomy', 'parent'], $parent);
     $form_state->set(['taxonomy', 'vocabulary'], $vocabulary);
 
-    $form['relations'] = array(
+    $form['relations'] = [
       '#type' => 'details',
       '#title' => $this->t('Relations'),
       '#open' => $vocabulary->getHierarchy() == VocabularyInterface::HIERARCHY_MULTIPLE,
       '#weight' => 10,
-    );
+    ];
 
     // \Drupal\taxonomy\TermStorageInterface::loadTree() and
     // \Drupal\taxonomy\TermStorageInterface::loadParents() may contain large
@@ -46,9 +46,9 @@ public function form(array $form, FormStateInterface $form_state) {
       $exclude[] = $term->id();
 
       $tree = $taxonomy_storage->loadTree($vocabulary->id());
-      $options = array('<' . $this->t('root') . '>');
+      $options = ['<' . $this->t('root') . '>'];
       if (empty($parent)) {
-        $parent = array(0);
+        $parent = [0];
       }
 
       foreach ($tree as $item) {
@@ -57,33 +57,33 @@ public function form(array $form, FormStateInterface $form_state) {
         }
       }
 
-      $form['relations']['parent'] = array(
+      $form['relations']['parent'] = [
         '#type' => 'select',
         '#title' => $this->t('Parent terms'),
         '#options' => $options,
         '#default_value' => $parent,
         '#multiple' => TRUE,
-      );
+      ];
     }
 
-    $form['relations']['weight'] = array(
+    $form['relations']['weight'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Weight'),
       '#size' => 6,
       '#default_value' => $term->getWeight(),
       '#description' => $this->t('Terms are displayed in ascending order by weight.'),
       '#required' => TRUE,
-    );
+    ];
 
-    $form['vid'] = array(
+    $form['vid'] = [
       '#type' => 'value',
       '#value' => $vocabulary->id(),
-    );
+    ];
 
-    $form['tid'] = array(
+    $form['tid'] = [
       '#type' => 'value',
       '#value' => $term->id(),
-    );
+    ];
 
     return parent::form($form, $form_state, $term);
   }
@@ -127,21 +127,21 @@ public function save(array $form, FormStateInterface $form_state) {
     $view_link = $term->link($term->getName());
     switch ($result) {
       case SAVED_NEW:
-        drupal_set_message($this->t('Created new term %term.', array('%term' => $view_link)));
-        $this->logger('taxonomy')->notice('Created new term %term.', array('%term' => $term->getName(), 'link' => $edit_link));
+        drupal_set_message($this->t('Created new term %term.', ['%term' => $view_link]));
+        $this->logger('taxonomy')->notice('Created new term %term.', ['%term' => $term->getName(), 'link' => $edit_link]);
         break;
       case SAVED_UPDATED:
-        drupal_set_message($this->t('Updated term %term.', array('%term' => $view_link)));
-        $this->logger('taxonomy')->notice('Updated term %term.', array('%term' => $term->getName(), 'link' => $edit_link));
+        drupal_set_message($this->t('Updated term %term.', ['%term' => $view_link]));
+        $this->logger('taxonomy')->notice('Updated term %term.', ['%term' => $term->getName(), 'link' => $edit_link]);
         break;
     }
 
     $current_parent_count = count($form_state->getValue('parent'));
     $previous_parent_count = count($form_state->get(['taxonomy', 'parent']));
     // Root doesn't count if it's the only parent.
-    if ($current_parent_count == 1 && $form_state->hasValue(array('parent', 0))) {
+    if ($current_parent_count == 1 && $form_state->hasValue(['parent', 0])) {
       $current_parent_count = 0;
-      $form_state->setValue('parent', array());
+      $form_state->setValue('parent', []);
     }
 
     // If the number of parents has been reduced to one or none, do a check on the
diff --git a/core/modules/taxonomy/src/TermStorage.php b/core/modules/taxonomy/src/TermStorage.php
index bc44c226fed1d581cb1e3f88d827e4fc7929edf9..0a00c13de5652eb1e81b268c2aa74039570caad7 100644
--- a/core/modules/taxonomy/src/TermStorage.php
+++ b/core/modules/taxonomy/src/TermStorage.php
@@ -15,49 +15,49 @@ class TermStorage extends SqlContentEntityStorage implements TermStorageInterfac
    *
    * @var array
    */
-  protected $parents = array();
+  protected $parents = [];
 
   /**
    * Array of all loaded term ancestry keyed by ancestor term ID.
    *
    * @var array
    */
-  protected $parentsAll = array();
+  protected $parentsAll = [];
 
   /**
    * Array of child terms keyed by parent term ID.
    *
    * @var array
    */
-  protected $children = array();
+  protected $children = [];
 
   /**
    * Array of term parents keyed by vocabulary ID and child term ID.
    *
    * @var array
    */
-  protected $treeParents = array();
+  protected $treeParents = [];
 
   /**
    * Array of term ancestors keyed by vocabulary ID and parent term ID.
    *
    * @var array
    */
-  protected $treeChildren = array();
+  protected $treeChildren = [];
 
   /**
    * Array of terms in a tree keyed by vocabulary ID and term ID.
    *
    * @var array
    */
-  protected $treeTerms = array();
+  protected $treeTerms = [];
 
   /**
    * Array of loaded trees keyed by a cache id matching tree arguments.
    *
    * @var array
    */
-  protected $trees = array();
+  protected $trees = [];
 
   /**
    * {@inheritdoc}
@@ -66,10 +66,10 @@ class TermStorage extends SqlContentEntityStorage implements TermStorageInterfac
    *   An array of values to set, keyed by property name. A value for the
    *   vocabulary ID ('vid') is required.
    */
-  public function create(array $values = array()) {
+  public function create(array $values = []) {
     // Save new terms with no parents by default.
     if (empty($values['parent'])) {
-      $values['parent'] = array(0);
+      $values['parent'] = [0];
     }
     $entity = parent::create($values);
     return $entity;
@@ -80,13 +80,13 @@ public function create(array $values = array()) {
    */
   public function resetCache(array $ids = NULL) {
     drupal_static_reset('taxonomy_term_count_nodes');
-    $this->parents = array();
-    $this->parentsAll = array();
-    $this->children = array();
-    $this->treeChildren = array();
-    $this->treeParents = array();
-    $this->treeTerms = array();
-    $this->trees = array();
+    $this->parents = [];
+    $this->parentsAll = [];
+    $this->children = [];
+    $this->treeChildren = [];
+    $this->treeParents = [];
+    $this->treeTerms = [];
+    $this->trees = [];
     parent::resetCache($ids);
   }
 
@@ -104,13 +104,13 @@ public function deleteTermHierarchy($tids) {
    */
   public function updateTermHierarchy(EntityInterface $term) {
     $query = $this->database->insert('taxonomy_term_hierarchy')
-      ->fields(array('tid', 'parent'));
+      ->fields(['tid', 'parent']);
 
     foreach ($term->parent as $parent) {
-      $query->values(array(
+      $query->values([
         'tid' => $term->id(),
         'parent' => (int) $parent->target_id,
-      ));
+      ]);
     }
     $query->execute();
   }
@@ -120,7 +120,7 @@ public function updateTermHierarchy(EntityInterface $term) {
    */
   public function loadParents($tid) {
     if (!isset($this->parents[$tid])) {
-      $parents = array();
+      $parents = [];
       $query = $this->database->select('taxonomy_term_field_data', 't');
       $query->join('taxonomy_term_hierarchy', 'h', 'h.parent = t.tid');
       $query->addField('t', 'tid');
@@ -142,7 +142,7 @@ public function loadParents($tid) {
    */
   public function loadAllParents($tid) {
     if (!isset($this->parentsAll[$tid])) {
-      $parents = array();
+      $parents = [];
       if ($term = $this->load($tid)) {
         $parents[$term->id()] = $term;
         $terms_to_search[] = $term->id();
@@ -169,7 +169,7 @@ public function loadAllParents($tid) {
    */
   public function loadChildren($tid, $vid = NULL) {
     if (!isset($this->children[$tid])) {
-      $children = array();
+      $children = [];
       $query = $this->database->select('taxonomy_term_field_data', 't');
       $query->join('taxonomy_term_hierarchy', 'h', 'h.tid = t.tid');
       $query->addField('t', 'tid');
@@ -198,15 +198,15 @@ public function loadTree($vid, $parent = 0, $max_depth = NULL, $load_entities =
       // We cache trees, so it's not CPU-intensive to call on a term and its
       // children, too.
       if (!isset($this->treeChildren[$vid])) {
-        $this->treeChildren[$vid] = array();
-        $this->treeParents[$vid] = array();
-        $this->treeTerms[$vid] = array();
+        $this->treeChildren[$vid] = [];
+        $this->treeParents[$vid] = [];
+        $this->treeTerms[$vid] = [];
         $query = $this->database->select('taxonomy_term_field_data', 't');
         $query->join('taxonomy_term_hierarchy', 'h', 'h.tid = t.tid');
         $result = $query
           ->addTag('taxonomy_term_access')
           ->fields('t')
-          ->fields('h', array('parent'))
+          ->fields('h', ['parent'])
           ->condition('t.vid', $vid)
           ->condition('t.default_langcode', 1)
           ->orderBy('t.weight')
@@ -221,17 +221,17 @@ public function loadTree($vid, $parent = 0, $max_depth = NULL, $load_entities =
 
       // Load full entities, if necessary. The entity controller statically
       // caches the results.
-      $term_entities = array();
+      $term_entities = [];
       if ($load_entities) {
         $term_entities = $this->loadMultiple(array_keys($this->treeTerms[$vid]));
       }
 
       $max_depth = (!isset($max_depth)) ? count($this->treeChildren[$vid]) : $max_depth;
-      $tree = array();
+      $tree = [];
 
       // Keeps track of the parents we have to process, the last entry is used
       // for the next processing step.
-      $process_parents = array();
+      $process_parents = [];
       $process_parents[] = $parent;
 
       // Loops over the parent terms and adds its children to the tree array.
@@ -304,7 +304,7 @@ public function nodeCount($vid) {
    */
   public function resetWeights($vid) {
     $this->database->update('taxonomy_term_field_data')
-      ->fields(array('weight' => 0))
+      ->fields(['weight' => 0])
       ->condition('vid', $vid)
       ->execute();
   }
@@ -312,10 +312,10 @@ public function resetWeights($vid) {
   /**
    * {@inheritdoc}
    */
-  public function getNodeTerms(array $nids, array $vocabs = array(), $langcode = NULL) {
+  public function getNodeTerms(array $nids, array $vocabs = [], $langcode = NULL) {
     $query = db_select('taxonomy_term_field_data', 'td');
     $query->innerJoin('taxonomy_index', 'tn', 'td.tid = tn.tid');
-    $query->fields('td', array('tid'));
+    $query->fields('td', ['tid']);
     $query->addField('tn', 'nid', 'node_nid');
     $query->orderby('td.weight');
     $query->orderby('td.name');
@@ -328,15 +328,15 @@ public function getNodeTerms(array $nids, array $vocabs = array(), $langcode = N
       $query->condition('td.langcode', $langcode);
     }
 
-    $results = array();
-    $all_tids = array();
+    $results = [];
+    $all_tids = [];
     foreach ($query->execute() as $term_record) {
       $results[$term_record->node_nid][] = $term_record->tid;
       $all_tids[] = $term_record->tid;
     }
 
     $all_terms = $this->loadMultiple($all_tids);
-    $terms = array();
+    $terms = [];
     foreach ($results as $nid => $tids) {
       foreach ($tids as $tid) {
         $terms[$nid][$tid] = $all_terms[$tid];
@@ -361,13 +361,13 @@ public function __sleep() {
   public function __wakeup() {
     parent::__wakeup();
     // Initialize static caches.
-    $this->parents = array();
-    $this->parentsAll = array();
-    $this->children = array();
-    $this->treeChildren = array();
-    $this->treeParents = array();
-    $this->treeTerms = array();
-    $this->trees = array();
+    $this->parents = [];
+    $this->parentsAll = [];
+    $this->children = [];
+    $this->treeChildren = [];
+    $this->treeParents = [];
+    $this->treeTerms = [];
+    $this->trees = [];
   }
 
 }
diff --git a/core/modules/taxonomy/src/TermStorageInterface.php b/core/modules/taxonomy/src/TermStorageInterface.php
index 99167114d147a8a1f03c7648871a827ee7dba240..05d8d7f4c7e77ee17005c277830de6ab2a937cbd 100644
--- a/core/modules/taxonomy/src/TermStorageInterface.php
+++ b/core/modules/taxonomy/src/TermStorageInterface.php
@@ -116,6 +116,6 @@ public function resetWeights($vid);
    * @return array
    *   An array of nids and the term entities they were tagged with.
    */
-  public function getNodeTerms(array $nids, array $vocabs = array(), $langcode = NULL);
+  public function getNodeTerms(array $nids, array $vocabs = [], $langcode = NULL);
 
 }
diff --git a/core/modules/taxonomy/src/TermStorageSchema.php b/core/modules/taxonomy/src/TermStorageSchema.php
index 5534821ef0c333fddbf097399960f944f097db56..5bcb088db455855868046019c6950506102e0183 100644
--- a/core/modules/taxonomy/src/TermStorageSchema.php
+++ b/core/modules/taxonomy/src/TermStorageSchema.php
@@ -17,93 +17,93 @@ class TermStorageSchema extends SqlContentEntityStorageSchema {
   protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $reset = FALSE) {
     $schema = parent::getEntitySchema($entity_type, $reset = FALSE);
 
-    $schema['taxonomy_term_field_data']['indexes'] += array(
-      'taxonomy_term__tree' => array('vid', 'weight', 'name'),
-      'taxonomy_term__vid_name' => array('vid', 'name'),
-    );
+    $schema['taxonomy_term_field_data']['indexes'] += [
+      'taxonomy_term__tree' => ['vid', 'weight', 'name'],
+      'taxonomy_term__vid_name' => ['vid', 'name'],
+    ];
 
-    $schema['taxonomy_term_hierarchy'] = array(
+    $schema['taxonomy_term_hierarchy'] = [
       'description' => 'Stores the hierarchical relationship between terms.',
-      'fields' => array(
-        'tid' => array(
+      'fields' => [
+        'tid' => [
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
           'description' => 'Primary Key: The {taxonomy_term_data}.tid of the term.',
-        ),
-        'parent' => array(
+        ],
+        'parent' => [
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
           'description' => "Primary Key: The {taxonomy_term_data}.tid of the term's parent. 0 indicates no parent.",
-        ),
-      ),
-      'indexes' => array(
-        'parent' => array('parent'),
-      ),
-      'foreign keys' => array(
-        'taxonomy_term_data' => array(
+        ],
+      ],
+      'indexes' => [
+        'parent' => ['parent'],
+      ],
+      'foreign keys' => [
+        'taxonomy_term_data' => [
           'table' => 'taxonomy_term_data',
-          'columns' => array('tid' => 'tid'),
-        ),
-      ),
-      'primary key' => array('tid', 'parent'),
-    );
+          'columns' => ['tid' => 'tid'],
+        ],
+      ],
+      'primary key' => ['tid', 'parent'],
+    ];
 
-    $schema['taxonomy_index'] = array(
+    $schema['taxonomy_index'] = [
       'description' => 'Maintains denormalized information about node/term relationships.',
-      'fields' => array(
-        'nid' => array(
+      'fields' => [
+        'nid' => [
           'description' => 'The {node}.nid this record tracks.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'tid' => array(
+        ],
+        'tid' => [
           'description' => 'The term ID.',
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'status' => array(
+        ],
+        'status' => [
           'description' => 'Boolean indicating whether the node is published (visible to non-administrators).',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 1,
-        ),
-        'sticky' => array(
+        ],
+        'sticky' => [
           'description' => 'Boolean indicating whether the node is sticky.',
           'type' => 'int',
           'not null' => FALSE,
           'default' => 0,
           'size' => 'tiny',
-        ),
-        'created' => array(
+        ],
+        'created' => [
           'description' => 'The Unix timestamp when the node was created.',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
-        ),
-      ),
-      'primary key' => array('nid', 'tid'),
-      'indexes' => array(
-        'term_node' => array('tid', 'status', 'sticky', 'created'),
-      ),
-      'foreign keys' => array(
-        'tracked_node' => array(
+        ],
+      ],
+      'primary key' => ['nid', 'tid'],
+      'indexes' => [
+        'term_node' => ['tid', 'status', 'sticky', 'created'],
+      ],
+      'foreign keys' => [
+        'tracked_node' => [
           'table' => 'node',
-          'columns' => array('nid' => 'nid'),
-        ),
-        'term' => array(
+          'columns' => ['nid' => 'nid'],
+        ],
+        'term' => [
           'table' => 'taxonomy_term_data',
-          'columns' => array('tid' => 'tid'),
-        ),
-      ),
-    );
+          'columns' => ['tid' => 'tid'],
+        ],
+      ],
+    ];
 
     return $schema;
   }
diff --git a/core/modules/taxonomy/src/TermTranslationHandler.php b/core/modules/taxonomy/src/TermTranslationHandler.php
index 72539b53dfd086afbfb456d066f766dfc08f4925..8339267c4173018a301cd4b0dd1b7281ef7f8e95 100644
--- a/core/modules/taxonomy/src/TermTranslationHandler.php
+++ b/core/modules/taxonomy/src/TermTranslationHandler.php
@@ -16,7 +16,7 @@ class TermTranslationHandler extends ContentTranslationHandler {
    */
   public function entityFormAlter(array &$form, FormStateInterface $form_state, EntityInterface $entity) {
     parent::entityFormAlter($form, $form_state, $entity);
-    $form['actions']['submit']['#submit'][] = array($this, 'entityFormSave');
+    $form['actions']['submit']['#submit'][] = [$this, 'entityFormSave'];
   }
 
   /**
diff --git a/core/modules/taxonomy/src/TermViewBuilder.php b/core/modules/taxonomy/src/TermViewBuilder.php
index ca74535ac4b27e696f87d6674b51dd13228d8eb3..6748a4b03cac13463be47bfaeffd049c47c22fd9 100644
--- a/core/modules/taxonomy/src/TermViewBuilder.php
+++ b/core/modules/taxonomy/src/TermViewBuilder.php
@@ -16,10 +16,10 @@ class TermViewBuilder extends EntityViewBuilder {
    */
   protected function alterBuild(array &$build, EntityInterface $entity, EntityViewDisplayInterface $display, $view_mode) {
     parent::alterBuild($build, $entity, $display, $view_mode);
-    $build['#contextual_links']['taxonomy_term'] = array(
-      'route_parameters' => array('taxonomy_term' => $entity->id()),
-      'metadata' => array('changed' => $entity->getChangedTime()),
-    );
+    $build['#contextual_links']['taxonomy_term'] = [
+      'route_parameters' => ['taxonomy_term' => $entity->id()],
+      'metadata' => ['changed' => $entity->getChangedTime()],
+    ];
   }
 
 }
diff --git a/core/modules/taxonomy/src/TermViewsData.php b/core/modules/taxonomy/src/TermViewsData.php
index 32a238b9b7f62d15b660407eafeb3592f3092c12..5e98bfe9b2aea1df316ea344cc558f64a4de9f01 100644
--- a/core/modules/taxonomy/src/TermViewsData.php
+++ b/core/modules/taxonomy/src/TermViewsData.php
@@ -19,13 +19,13 @@ public function getViewsData() {
     $data['taxonomy_term_field_data']['table']['base']['access query tag'] = 'taxonomy_term_access';
     $data['taxonomy_term_field_data']['table']['wizard_id'] = 'taxonomy_term';
 
-    $data['taxonomy_term_field_data']['table']['join'] = array(
+    $data['taxonomy_term_field_data']['table']['join'] = [
       // This is provided for the many_to_one argument.
-      'taxonomy_index' => array(
+      'taxonomy_index' => [
         'field' => 'tid',
         'left_field' => 'tid',
-      ),
-    );
+      ],
+    ];
 
     $data['taxonomy_term_field_data']['tid']['help'] = $this->t('The tid of a taxonomy term.');
 
@@ -39,18 +39,18 @@ public function getViewsData() {
     $data['taxonomy_term_field_data']['tid']['filter']['hierarchy table'] = 'taxonomy_term_hierarchy';
     $data['taxonomy_term_field_data']['tid']['filter']['numeric'] = TRUE;
 
-    $data['taxonomy_term_field_data']['tid_raw'] = array(
+    $data['taxonomy_term_field_data']['tid_raw'] = [
       'title' => $this->t('Term ID'),
       'help' => $this->t('The tid of a taxonomy term.'),
       'real field' => 'tid',
-      'filter' => array(
+      'filter' => [
         'id' => 'numeric',
         'allow empty' => TRUE,
-      ),
-    );
+      ],
+    ];
 
-    $data['taxonomy_term_field_data']['tid_representative'] = array(
-      'relationship' => array(
+    $data['taxonomy_term_field_data']['tid_representative'] = [
+      'relationship' => [
         'title' => $this->t('Representative node'),
         'label'  => $this->t('Representative node'),
         'help' => $this->t('Obtains a single representative node for each term, according to a chosen sort criterion.'),
@@ -62,8 +62,8 @@ public function getViewsData() {
         'base'   => 'node_field_data',
         'field'  => 'nid',
         'relationship' => 'node_field_data:term_node_tid'
-      ),
-    );
+      ],
+    ];
 
     $data['taxonomy_term_field_data']['vid']['help'] = $this->t('Filter the results of "Taxonomy: Term" to a particular vocabulary.');
     unset($data['taxonomy_term_field_data']['vid']['field']);
@@ -79,114 +79,114 @@ public function getViewsData() {
     $data['taxonomy_term_field_data']['changed']['title'] = $this->t('Updated date');
     $data['taxonomy_term_field_data']['changed']['help'] = $this->t('The date the term was last updated.');
 
-    $data['taxonomy_term_field_data']['changed_fulldate'] = array(
+    $data['taxonomy_term_field_data']['changed_fulldate'] = [
       'title' => $this->t('Updated date'),
       'help' => $this->t('Date in the form of CCYYMMDD.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_fulldate',
-      ),
-    );
+      ],
+    ];
 
-    $data['taxonomy_term_field_data']['changed_year_month'] = array(
+    $data['taxonomy_term_field_data']['changed_year_month'] = [
       'title' => $this->t('Updated year + month'),
       'help' => $this->t('Date in the form of YYYYMM.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_year_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['taxonomy_term_field_data']['changed_year'] = array(
+    $data['taxonomy_term_field_data']['changed_year'] = [
       'title' => $this->t('Updated year'),
       'help' => $this->t('Date in the form of YYYY.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_year',
-      ),
-    );
+      ],
+    ];
 
-    $data['taxonomy_term_field_data']['changed_month'] = array(
+    $data['taxonomy_term_field_data']['changed_month'] = [
       'title' => $this->t('Updated month'),
       'help' => $this->t('Date in the form of MM (01 - 12).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['taxonomy_term_field_data']['changed_day'] = array(
+    $data['taxonomy_term_field_data']['changed_day'] = [
       'title' => $this->t('Updated day'),
       'help' => $this->t('Date in the form of DD (01 - 31).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_day',
-      ),
-    );
+      ],
+    ];
 
-    $data['taxonomy_term_field_data']['changed_week'] = array(
+    $data['taxonomy_term_field_data']['changed_week'] = [
       'title' => $this->t('Updated week'),
       'help' => $this->t('Date in the form of WW (01 - 53).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_week',
-      ),
-    );
+      ],
+    ];
 
     $data['taxonomy_index']['table']['group']  = $this->t('Taxonomy term');
 
-    $data['taxonomy_index']['table']['join'] = array(
-      'taxonomy_term_field_data' => array(
+    $data['taxonomy_index']['table']['join'] = [
+      'taxonomy_term_field_data' => [
         // links directly to taxonomy_term_field_data via tid
         'left_field' => 'tid',
         'field' => 'tid',
-      ),
-      'node_field_data' => array(
+      ],
+      'node_field_data' => [
         // links directly to node via nid
         'left_field' => 'nid',
         'field' => 'nid',
-      ),
-      'taxonomy_term_hierarchy' => array(
+      ],
+      'taxonomy_term_hierarchy' => [
         'left_field' => 'tid',
         'field' => 'tid',
-      ),
-    );
+      ],
+    ];
 
-    $data['taxonomy_index']['nid'] = array(
+    $data['taxonomy_index']['nid'] = [
       'title' => $this->t('Content with term'),
       'help' => $this->t('Relate all content tagged with a term.'),
-      'relationship' => array(
+      'relationship' => [
         'id' => 'standard',
         'base' => 'node',
         'base field' => 'nid',
         'label' => $this->t('node'),
         'skip base' => 'node',
-      ),
-    );
+      ],
+    ];
 
     // @todo This stuff needs to move to a node field since really it's all
     //   about nodes.
-    $data['taxonomy_index']['tid'] = array(
+    $data['taxonomy_index']['tid'] = [
       'group' => $this->t('Content'),
       'title' => $this->t('Has taxonomy term ID'),
       'help' => $this->t('Display content if it has the selected taxonomy terms.'),
-      'argument' => array(
+      'argument' => [
         'id' => 'taxonomy_index_tid',
         'name table' => 'taxonomy_term_field_data',
         'name field' => 'name',
         'empty field name' => $this->t('Uncategorized'),
         'numeric' => TRUE,
         'skip base' => 'taxonomy_term_field_data',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'title' => $this->t('Has taxonomy term'),
         'id' => 'taxonomy_index_tid',
         'hierarchy table' => 'taxonomy_term_hierarchy',
         'numeric' => TRUE,
         'skip base' => 'taxonomy_term_field_data',
         'allow empty' => TRUE,
-      ),
-    );
+      ],
+    ];
 
     $data['taxonomy_index']['status'] = [
       'title' => $this->t('Publish status'),
@@ -226,37 +226,37 @@ public function getViewsData() {
     $data['taxonomy_term_hierarchy']['table']['group']  = $this->t('Taxonomy term');
     $data['taxonomy_term_hierarchy']['table']['provider']  = 'taxonomy';
 
-    $data['taxonomy_term_hierarchy']['table']['join'] = array(
-      'taxonomy_term_hierarchy' => array(
+    $data['taxonomy_term_hierarchy']['table']['join'] = [
+      'taxonomy_term_hierarchy' => [
         // Link to self through left.parent = right.tid (going down in depth).
         'left_field' => 'tid',
         'field' => 'parent',
-      ),
-      'taxonomy_term_field_data' => array(
+      ],
+      'taxonomy_term_field_data' => [
         // Link directly to taxonomy_term_field_data via tid.
         'left_field' => 'tid',
         'field' => 'tid',
-      ),
-    );
+      ],
+    ];
 
-    $data['taxonomy_term_hierarchy']['parent'] = array(
+    $data['taxonomy_term_hierarchy']['parent'] = [
       'title' => $this->t('Parent term'),
       'help' => $this->t('The parent term of the term. This can produce duplicate entries if you are using a vocabulary that allows multiple parents.'),
-      'relationship' => array(
+      'relationship' => [
         'base' => 'taxonomy_term_field_data',
         'field' => 'parent',
         'label' => $this->t('Parent'),
         'id' => 'standard',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'help' => $this->t('Filter the results of "Taxonomy: Term" by the parent pid.'),
         'id' => 'numeric',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'help' => $this->t('The parent term of the term.'),
         'id' => 'taxonomy',
-      ),
-    );
+      ],
+    ];
 
     return $data;
   }
diff --git a/core/modules/taxonomy/src/Tests/RssTest.php b/core/modules/taxonomy/src/Tests/RssTest.php
index f26cb077477609dca0ec610d6ce3ebdb1a7e110c..315f64d5df0b0a8e2c492a625af91a37b2ff9931 100644
--- a/core/modules/taxonomy/src/Tests/RssTest.php
+++ b/core/modules/taxonomy/src/Tests/RssTest.php
@@ -18,7 +18,7 @@ class RssTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'field_ui', 'views');
+  public static $modules = ['node', 'field_ui', 'views'];
 
   /**
    * Vocabulary for testing.
@@ -41,23 +41,23 @@ protected function setUp() {
     $this->vocabulary = $this->createVocabulary();
     $this->fieldName = 'taxonomy_' . $this->vocabulary->id();
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $this->fieldName, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
     entity_get_display('node', 'article', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
   }
 
@@ -72,21 +72,21 @@ function testTaxonomyRss() {
 
     // RSS display must be added manually.
     $this->drupalGet("admin/structure/types/manage/article/display");
-    $edit = array(
+    $edit = [
       "display_modes_custom[rss]" => '1',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     // Change the format to 'RSS category'.
     $this->drupalGet("admin/structure/types/manage/article/display/rss");
-    $edit = array(
+    $edit = [
       "fields[taxonomy_" . $this->vocabulary->id() . "][type]" => 'entity_reference_rss_category',
       "fields[taxonomy_" . $this->vocabulary->id() . "][region]" => 'content',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     // Post an article.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $edit[$this->fieldName . '[]'] = $term1->id();
     $this->drupalPostForm('node/add/article', $edit, t('Save'));
@@ -95,7 +95,7 @@ function testTaxonomyRss() {
     $this->drupalGet('rss.xml');
     $test_element = sprintf(
       '<category %s>%s</category>',
-      'domain="' . $term1->url('canonical', array('absolute' => TRUE)) . '"',
+      'domain="' . $term1->url('canonical', ['absolute' => TRUE]) . '"',
       $term1->getName()
     );
     $this->assertRaw($test_element, 'Term is displayed when viewing the rss feed.');
diff --git a/core/modules/taxonomy/src/Tests/TaxonomyImageTest.php b/core/modules/taxonomy/src/Tests/TaxonomyImageTest.php
index 306e160b2ac56ea04806ee77373b8d955a8c1e8c..7d2ee2b639d3a83cccd18ef09947b1c40dcd4aae 100644
--- a/core/modules/taxonomy/src/Tests/TaxonomyImageTest.php
+++ b/core/modules/taxonomy/src/Tests/TaxonomyImageTest.php
@@ -26,48 +26,48 @@ class TaxonomyImageTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('image');
+  public static $modules = ['image'];
 
   protected function setUp() {
     parent::setUp();
 
     // Remove access content permission from registered users.
-    user_role_revoke_permissions(RoleInterface::AUTHENTICATED_ID, array('access content'));
+    user_role_revoke_permissions(RoleInterface::AUTHENTICATED_ID, ['access content']);
 
     $this->vocabulary = $this->createVocabulary();
     // Add a field to the vocabulary.
     $entity_type = 'taxonomy_term';
     $name = 'field_test';
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $name,
       'entity_type' => $entity_type,
       'type' => 'image',
-      'settings' => array(
+      'settings' => [
         'uri_scheme' => 'private',
-      ),
-    ))->save();
+      ],
+    ])->save();
     FieldConfig::create([
       'field_name' => $name,
       'entity_type' => $entity_type,
       'bundle' => $this->vocabulary->id(),
-      'settings' => array(),
+      'settings' => [],
     ])->save();
     entity_get_display($entity_type, $this->vocabulary->id(), 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'type' => 'image',
-        'settings' => array(),
-      ))
+        'settings' => [],
+      ])
       ->save();
     entity_get_form_display($entity_type, $this->vocabulary->id(), 'default')
-      ->setComponent($name, array(
+      ->setComponent($name, [
         'type' => 'image_image',
-        'settings' => array(),
-      ))
+        'settings' => [],
+      ])
       ->save();
   }
 
   public function testTaxonomyImageAccess() {
-    $user = $this->drupalCreateUser(array('administer site configuration', 'administer taxonomy', 'access user profiles'));
+    $user = $this->drupalCreateUser(['administer site configuration', 'administer taxonomy', 'access user profiles']);
     $this->drupalLogin($user);
 
     // Create a term and upload the image.
@@ -77,12 +77,12 @@ public function testTaxonomyImageAccess() {
     $edit['files[field_test_0]'] = drupal_realpath($image->uri);
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add', $edit, t('Save'));
     $this->drupalPostForm(NULL, ['field_test[0][alt]' => $this->randomMachineName()], t('Save'));
-    $terms = entity_load_multiple_by_properties('taxonomy_term', array('name' => $edit['name[0][value]']));
+    $terms = entity_load_multiple_by_properties('taxonomy_term', ['name' => $edit['name[0][value]']]);
     $term = reset($terms);
-    $this->assertText(t('Created new term @name.', array('@name' => $term->getName())));
+    $this->assertText(t('Created new term @name.', ['@name' => $term->getName()]));
 
     // Create a user that should have access to the file and one that doesn't.
-    $access_user = $this->drupalCreateUser(array('access content'));
+    $access_user = $this->drupalCreateUser(['access content']);
     $no_access_user = $this->drupalCreateUser();
     $image = File::load($term->field_test->target_id);
     $this->drupalLogin($access_user);
diff --git a/core/modules/taxonomy/src/Tests/TaxonomyQueryAlterTest.php b/core/modules/taxonomy/src/Tests/TaxonomyQueryAlterTest.php
index 543910b0b67134c53853e6f2c1194f0cdd577932..e5e787bb59b527e4a9d2631b4516e8056210b85c 100644
--- a/core/modules/taxonomy/src/Tests/TaxonomyQueryAlterTest.php
+++ b/core/modules/taxonomy/src/Tests/TaxonomyQueryAlterTest.php
@@ -26,7 +26,7 @@ class TaxonomyQueryAlterTest extends WebTestBase {
   public function testTaxonomyQueryAlter() {
     // Create a new vocabulary and add a few terms to it.
     $vocabulary = $this->createVocabulary();
-    $terms = array();
+    $terms = [];
     for ($i = 0; $i < 5; $i++) {
       $terms[$i] = $this->createTerm($vocabulary);
     }
diff --git a/core/modules/taxonomy/src/Tests/TaxonomyTermIndentationTest.php b/core/modules/taxonomy/src/Tests/TaxonomyTermIndentationTest.php
index 6043d77517cbcda832d36245d6defb6b175f8c9d..b48de1a7adfabdd3118813109af45b920348d359 100644
--- a/core/modules/taxonomy/src/Tests/TaxonomyTermIndentationTest.php
+++ b/core/modules/taxonomy/src/Tests/TaxonomyTermIndentationTest.php
@@ -14,7 +14,7 @@ class TaxonomyTermIndentationTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * Vocabulary for testing.
@@ -42,12 +42,12 @@ function testTermIndentation() {
     $taxonomy_storage = $this->container->get('entity.manager')->getStorage('taxonomy_term');
 
     // Indent the second term under the first one.
-    $edit = array(
+    $edit = [
       'terms[tid:' . $term2->id() . ':0][term][tid]' => 2,
       'terms[tid:' . $term2->id() . ':0][term][parent]' => 1,
       'terms[tid:' . $term2->id() . ':0][term][depth]' => 1,
       'terms[tid:' . $term2->id() . ':0][weight]' => 1,
-    );
+    ];
 
     // Submit the edited form and check for HTML indentation element presence.
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->get('vid') . '/overview', $edit, t('Save'));
@@ -58,12 +58,12 @@ function testTermIndentation() {
     $this->assertEqual(key($parents), 1, 'Term 1 is the term 2\'s parent');
 
     // Move the second term back out to the root level.
-    $edit = array(
+    $edit = [
       'terms[tid:' . $term2->id() . ':0][term][tid]' => 2,
       'terms[tid:' . $term2->id() . ':0][term][parent]' => 0,
       'terms[tid:' . $term2->id() . ':0][term][depth]' => 0,
       'terms[tid:' . $term2->id() . ':0][weight]' => 1,
-    );
+    ];
 
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->get('vid' ) . '/overview', $edit, t('Save'));
     // All terms back at the root level, no indentation should be present.
diff --git a/core/modules/taxonomy/src/Tests/TaxonomyTestBase.php b/core/modules/taxonomy/src/Tests/TaxonomyTestBase.php
index 12c30c7841f0dbc2fca165c9f15b9afb360b7b43..838a9b02c90f0c121be860b5511bf359f5afaf25 100644
--- a/core/modules/taxonomy/src/Tests/TaxonomyTestBase.php
+++ b/core/modules/taxonomy/src/Tests/TaxonomyTestBase.php
@@ -21,7 +21,7 @@ abstract class TaxonomyTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'block');
+  public static $modules = ['taxonomy', 'block'];
 
   /**
    * {@inheritdoc}
@@ -32,7 +32,7 @@ protected function setUp() {
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
   }
 
diff --git a/core/modules/taxonomy/src/Tests/TaxonomyTestTrait.php b/core/modules/taxonomy/src/Tests/TaxonomyTestTrait.php
index f04be0013e35059c85fa442770727db43cfd362d..dae42f3fe9dc71a5cd05c0cc9b9b5f2802f81f35 100644
--- a/core/modules/taxonomy/src/Tests/TaxonomyTestTrait.php
+++ b/core/modules/taxonomy/src/Tests/TaxonomyTestTrait.php
@@ -40,7 +40,7 @@ function createVocabulary() {
    * @return \Drupal\taxonomy\Entity\Term
    *   The new taxonomy term object.
    */
-  function createTerm(Vocabulary $vocabulary, $values = array()) {
+  function createTerm(Vocabulary $vocabulary, $values = []) {
     $filter_formats = filter_formats();
     $format = array_pop($filter_formats);
     $term = Term::create($values + [
diff --git a/core/modules/taxonomy/src/Tests/TaxonomyTranslationTestTrait.php b/core/modules/taxonomy/src/Tests/TaxonomyTranslationTestTrait.php
index 5ae6270356ff279a42a1d301320390fea2cc50b6..3607fc6b0a52233df654f45849b365e0cc133f0c 100644
--- a/core/modules/taxonomy/src/Tests/TaxonomyTranslationTestTrait.php
+++ b/core/modules/taxonomy/src/Tests/TaxonomyTranslationTestTrait.php
@@ -79,26 +79,26 @@ protected function enableTranslation() {
    *   to FALSE.
    */
   protected function setUpTermReferenceField() {
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $this->termFieldName, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
     $field_storage = FieldStorageConfig::loadByName('node', $this->termFieldName);
     $field_storage->setTranslatable(FALSE);
     $field_storage->save();
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($this->termFieldName, array(
+      ->setComponent($this->termFieldName, [
         'type' => 'entity_reference_autocomplete_tags',
-      ))
+      ])
       ->save();
     entity_get_display('node', 'article', 'default')
-      ->setComponent($this->termFieldName, array(
+      ->setComponent($this->termFieldName, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/taxonomy/src/Tests/TermTest.php b/core/modules/taxonomy/src/Tests/TermTest.php
index 311ed6b7c30f47347b6bb30ed8c68c00feaf3978..cba983ddcdfa04bf727b7dbb1f44d4b329a9ad9a 100644
--- a/core/modules/taxonomy/src/Tests/TermTest.php
+++ b/core/modules/taxonomy/src/Tests/TermTest.php
@@ -52,24 +52,24 @@ protected function setUp() {
 
     $field_name = 'taxonomy_' . $this->vocabulary->id();
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $field_name, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
     $this->field = FieldConfig::loadByName('node', 'article', $field_name);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
     entity_get_display('node', 'article', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
   }
 
@@ -89,8 +89,8 @@ function testTaxonomyTermHierarchy() {
     $this->assertEqual(0, $vocabulary->getHierarchy(), 'Vocabulary is flat.');
 
     // Edit $term2, setting $term1 as parent.
-    $edit = array();
-    $edit['parent[]'] = array($term1->id());
+    $edit = [];
+    $edit['parent[]'] = [$term1->id()];
     $this->drupalPostForm('taxonomy/term/' . $term2->id() . '/edit', $edit, t('Save'));
 
     // Check the hierarchy.
@@ -107,7 +107,7 @@ function testTaxonomyTermHierarchy() {
 
     // Create a third term and save this as a parent of term2.
     $term3 = $this->createTerm($this->vocabulary);
-    $term2->parent = array($term1->id(), $term3->id());
+    $term2->parent = [$term1->id(), $term3->id()];
     $term2->save();
     $parents = $taxonomy_storage->loadParents($term2->id());
     $this->assertTrue(isset($parents[$term1->id()]) && isset($parents[$term3->id()]), 'Both parents found successfully.');
@@ -127,7 +127,7 @@ function testTaxonomyTermChildTerms() {
     // Create 40 terms. Terms 1-12 get parent of $term1. All others are
     // individual terms.
     for ($x = 1; $x <= 40; $x++) {
-      $edit = array();
+      $edit = [];
       // Set terms in order so we know which terms will be on which pages.
       $edit['weight'] = $x;
 
@@ -149,14 +149,14 @@ function testTaxonomyTermChildTerms() {
     }
 
     // Get Page 2.
-    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', array('query' => array('page' => 1)));
+    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', ['query' => ['page' => 1]]);
     $this->assertText($term1->getName(), 'Parent Term is displayed on Page 2');
     for ($x = 1; $x <= 18; $x++) {
       $this->assertText($terms_array[$x]->getName(), $terms_array[$x]->getName() . ' found on Page 2');
     }
 
     // Get Page 3.
-    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', array('query' => array('page' => 2)));
+    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', ['query' => ['page' => 2]]);
     $this->assertNoText($term1->getName(), 'Parent Term is not displayed on Page 3');
     for ($x = 1; $x <= 17; $x++) {
       $this->assertNoText($terms_array[$x]->getName(), $terms_array[$x]->getName() . ' not found on Page 3');
@@ -177,7 +177,7 @@ function testTaxonomyNode() {
     $term2 = $this->createTerm($this->vocabulary);
 
     // Post an article.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $edit['body[0][value]'] = $this->randomMachineName();
     $edit[$this->field->getName() . '[]'] = $term1->id();
@@ -190,7 +190,7 @@ function testTaxonomyNode() {
 
     $this->clickLink(t('Edit'));
     $this->assertText($term1->getName(), 'Term is displayed when editing the node.');
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $this->assertText($term1->getName(), 'Term is displayed after saving the node with no changes.');
 
     // Edit the node with a different term.
@@ -214,24 +214,24 @@ function testNodeTermCreationAndDeletion() {
     // Enable tags in the vocabulary.
     $field = $this->field;
     entity_get_form_display($field->getTargetEntityTypeId(), $field->getTargetBundle(), 'default')
-      ->setComponent($field->getName(), array(
+      ->setComponent($field->getName(), [
         'type' => 'entity_reference_autocomplete_tags',
-        'settings' => array(
+        'settings' => [
           'placeholder' => 'Start typing here.',
-        ),
-      ))
+        ],
+      ])
       ->save();
     // Prefix the terms with a letter to ensure there is no clash in the first
     // three letters.
     // @see https://www.drupal.org/node/2397691
-    $terms = array(
+    $terms = [
       'term1' => 'a' . $this->randomMachineName(),
       'term2' => 'b' . $this->randomMachineName(),
       'term3' => 'c' . $this->randomMachineName() . ', ' . $this->randomMachineName(),
       'term4' => 'd' . $this->randomMachineName(),
-    );
+    ];
 
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $edit['body[0][value]'] = $this->randomMachineName();
     // Insert the terms in a comma separated list. Vocabulary 1 is a
@@ -255,10 +255,10 @@ function testNodeTermCreationAndDeletion() {
 
     // Save, creating the terms.
     $this->drupalPostForm('node/add/article', $edit, t('Save'));
-    $this->assertText(t('@type @title has been created.', array('@type' => t('Article'), '@title' => $edit['title[0][value]'])), 'The node was created successfully.');
+    $this->assertText(t('@type @title has been created.', ['@type' => t('Article'), '@title' => $edit['title[0][value]']]), 'The node was created successfully.');
 
     // Verify that the creation message contains a link to a node.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'node/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'node/']);
     $this->assert(isset($view_link), 'The message area contains a link to a node');
 
     foreach ($terms as $term) {
@@ -266,7 +266,7 @@ function testNodeTermCreationAndDeletion() {
     }
 
     // Get the created terms.
-    $term_objects = array();
+    $term_objects = [];
     foreach ($terms as $key => $term) {
       $term_objects[$key] = taxonomy_term_load_multiple_by_name($term);
       $term_objects[$key] = reset($term_objects[$key]);
@@ -288,30 +288,30 @@ function testNodeTermCreationAndDeletion() {
 
     // Delete term 2 from the term delete page.
     $this->drupalGet('taxonomy/term/' . $term_objects['term2']->id() . '/delete');
-    $this->drupalPostForm(NULL, array(), t('Delete'));
-    $term_names = array($term_objects['term3']->getName(), $term_objects['term4']->getName());
+    $this->drupalPostForm(NULL, [], t('Delete'));
+    $term_names = [$term_objects['term3']->getName(), $term_objects['term4']->getName()];
 
     $this->drupalGet('node/' . $node->id());
 
     foreach ($term_names as $term_name) {
-      $this->assertText($term_name, format_string('The term %name appears on the node page after two terms, %deleted1 and %deleted2, were deleted.', array('%name' => $term_name, '%deleted1' => $term_objects['term1']->getName(), '%deleted2' => $term_objects['term2']->getName())));
+      $this->assertText($term_name, format_string('The term %name appears on the node page after two terms, %deleted1 and %deleted2, were deleted.', ['%name' => $term_name, '%deleted1' => $term_objects['term1']->getName(), '%deleted2' => $term_objects['term2']->getName()]));
     }
-    $this->assertNoText($term_objects['term1']->getName(), format_string('The deleted term %name does not appear on the node page.', array('%name' => $term_objects['term1']->getName())));
-    $this->assertNoText($term_objects['term2']->getName(), format_string('The deleted term %name does not appear on the node page.', array('%name' => $term_objects['term2']->getName())));
+    $this->assertNoText($term_objects['term1']->getName(), format_string('The deleted term %name does not appear on the node page.', ['%name' => $term_objects['term1']->getName()]));
+    $this->assertNoText($term_objects['term2']->getName(), format_string('The deleted term %name does not appear on the node page.', ['%name' => $term_objects['term2']->getName()]));
   }
 
   /**
    * Save, edit and delete a term using the user interface.
    */
   function testTermInterface() {
-    \Drupal::service('module_installer')->install(array('views'));
-    $edit = array(
+    \Drupal::service('module_installer')->install(['views']);
+    $edit = [
       'name[0][value]' => $this->randomMachineName(12),
       'description[0][value]' => $this->randomMachineName(100),
-    );
+    ];
     // Explicitly set the parents field to 'root', to ensure that
     // TermForm::save() handles the invalid term ID correctly.
-    $edit['parent[]'] = array(0);
+    $edit['parent[]'] = [0];
 
     // Create the term to edit.
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add', $edit, t('Save'));
@@ -328,10 +328,10 @@ function testTermInterface() {
     $this->assertRaw($edit['name[0][value]'], 'The randomly generated term name is present.');
     $this->assertText($edit['description[0][value]'], 'The randomly generated term description is present.');
 
-    $edit = array(
+    $edit = [
       'name[0][value]' => $this->randomMachineName(14),
       'description[0][value]' => $this->randomMachineName(102),
-    );
+    ];
 
     // Edit the term.
     $this->drupalPostForm('taxonomy/term/' . $term->id() . '/edit', $edit, t('Save'));
@@ -398,7 +398,7 @@ function testTermReorder() {
     // "tid:1:0[depth]", and "tid:1:0[weight]". Change the order to term2,
     // term3, term1 by setting weight property, make term3 a child of term2 by
     // setting the parent and depth properties, and update all hidden fields.
-    $edit = array(
+    $edit = [
       'terms[tid:' . $term2->id() . ':0][term][tid]' => $term2->id(),
       'terms[tid:' . $term2->id() . ':0][term][parent]' => 0,
       'terms[tid:' . $term2->id() . ':0][term][depth]' => 0,
@@ -411,18 +411,18 @@ function testTermReorder() {
       'terms[tid:' . $term1->id() . ':0][term][parent]' => 0,
       'terms[tid:' . $term1->id() . ':0][term][depth]' => 0,
       'terms[tid:' . $term1->id() . ':0][weight]' => 2,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     $taxonomy_storage->resetCache();
     $terms = $taxonomy_storage->loadTree($this->vocabulary->id());
     $this->assertEqual($terms[0]->tid, $term2->id(), 'Term 2 was moved above term 1.');
-    $this->assertEqual($terms[1]->parents, array($term2->id()), 'Term 3 was made a child of term 2.');
+    $this->assertEqual($terms[1]->parents, [$term2->id()], 'Term 3 was made a child of term 2.');
     $this->assertEqual($terms[2]->tid, $term1->id(), 'Term 1 was moved below term 2.');
 
-    $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', array(), t('Reset to alphabetical'));
+    $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', [], t('Reset to alphabetical'));
     // Submit confirmation form.
-    $this->drupalPostForm(NULL, array(), t('Reset to alphabetical'));
+    $this->drupalPostForm(NULL, [], t('Reset to alphabetical'));
     // Ensure form redirected back to overview.
     $this->assertUrl('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview');
 
@@ -431,7 +431,7 @@ function testTermReorder() {
     $this->assertEqual($terms[0]->id(), $term1->id(), 'Term 1 was moved to back above term 2.');
     $this->assertEqual($terms[1]->id(), $term2->id(), 'Term 2 was moved to back below term 1.');
     $this->assertEqual($terms[2]->id(), $term3->id(), 'Term 3 is still below term 2.');
-    $this->assertEqual($terms[2]->parents, array($term2->id()), 'Term 3 is still a child of term 2.');
+    $this->assertEqual($terms[2]->parents, [$term2->id()], 'Term 3 is still a child of term 2.');
   }
 
   /**
@@ -442,11 +442,11 @@ function testTermMultipleParentsInterface() {
     $parent = $this->createTerm($this->vocabulary);
 
     // Add a new term with multiple parents.
-    $edit = array(
+    $edit = [
       'name[0][value]' => $this->randomMachineName(12),
       'description[0][value]' => $this->randomMachineName(100),
-      'parent[]' => array(0, $parent->id()),
-    );
+      'parent[]' => [0, $parent->id()],
+    ];
     // Save the new term.
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add', $edit, t('Save'));
 
@@ -530,14 +530,14 @@ function testReSavingTags() {
     // Enable tags in the vocabulary.
     $field = $this->field;
     entity_get_form_display($field->getTargetEntityTypeId(), $field->getTargetBundle(), 'default')
-      ->setComponent($field->getName(), array(
+      ->setComponent($field->getName(), [
         'type' => 'entity_reference_autocomplete_tags',
-      ))
+      ])
       ->save();
 
     // Create a term and a node using it.
     $term = $this->createTerm($this->vocabulary);
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName(8);
     $edit['body[0][value]'] = $this->randomMachineName(16);
     $edit[$this->field->getName() . '[target_id]'] = $term->getName();
@@ -547,7 +547,7 @@ function testReSavingTags() {
     // changes.
     $this->clickLink(t('Edit'));
     $this->assertRaw($term->getName(), 'Term is displayed when editing the node.');
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $this->assertRaw($term->getName(), 'Term is displayed after saving the node with no changes.');
   }
 
diff --git a/core/modules/taxonomy/src/Tests/TermTranslationTest.php b/core/modules/taxonomy/src/Tests/TermTranslationTest.php
index 91b13b158ab0872e6c336150280861e0c284717a..c1425b72adcf1e0ec7d1172dd722583b9f2464b6 100644
--- a/core/modules/taxonomy/src/Tests/TermTranslationTest.php
+++ b/core/modules/taxonomy/src/Tests/TermTranslationTest.php
@@ -20,23 +20,23 @@ class TermTranslationTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  protected $termTranslationMap = array(
+  protected $termTranslationMap = [
     'one' => 'translatedOne',
     'two' => 'translatedTwo',
     'three' => 'translatedThree',
-  );
+  ];
 
   /**
    * Created terms.
    *
    * @var \Drupal\taxonomy\Entity\Term[]
    */
-  protected $terms = array();
+  protected $terms = [];
 
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('taxonomy', 'language', 'content_translation');
+  public static $modules = ['taxonomy', 'language', 'content_translation'];
 
   /**
    * {@inheritdoc}
@@ -55,7 +55,7 @@ protected function setUp() {
    */
   public function testTranslatedBreadcrumbs() {
     // Ensure non-translated breadcrumb is correct.
-    $breadcrumb = array(Url::fromRoute('<front>')->toString() => 'Home');
+    $breadcrumb = [Url::fromRoute('<front>')->toString() => 'Home'];
     foreach ($this->terms as $term) {
       $breadcrumb[$term->url()] = $term->label();
     }
@@ -69,7 +69,7 @@ public function testTranslatedBreadcrumbs() {
     $languages = \Drupal::languageManager()->getLanguages();
 
     // Construct the expected translated breadcrumb.
-    $breadcrumb = array(Url::fromRoute('<front>', [], ['language' => $languages[$this->translateToLangcode]])->toString() => 'Home');
+    $breadcrumb = [Url::fromRoute('<front>', [], ['language' => $languages[$this->translateToLangcode]])->toString() => 'Home'];
     foreach ($this->terms as $term) {
       $translated = $term->getTranslation($this->translateToLangcode);
       $url = $translated->url('canonical', ['language' => $languages[$this->translateToLangcode]]);
@@ -92,9 +92,9 @@ protected function testTermsTranslation() {
     // Set the display of the term reference field on the article content type
     // to "Check boxes/radio buttons".
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($this->termFieldName, array(
+      ->setComponent($this->termFieldName, [
         'type' => 'options_buttons',
-      ))
+      ])
       ->save();
     $this->drupalLogin($this->drupalCreateUser(['create article content']));
 
@@ -118,15 +118,15 @@ protected function setUpTerms() {
     $parent_vid = 0;
     foreach ($this->termTranslationMap as $name => $translation) {
 
-      $term = $this->createTerm($this->vocabulary, array(
+      $term = $this->createTerm($this->vocabulary, [
         'name' => $name,
         'langcode' => $this->baseLangcode,
         'parent' => $parent_vid,
-      ));
+      ]);
 
-      $term->addTranslation($this->translateToLangcode, array(
+      $term->addTranslation($this->translateToLangcode, [
         'name' => $translation,
-      ));
+      ]);
       $term->save();
 
       // Each term is nested under the last.
diff --git a/core/modules/taxonomy/src/Tests/TermTranslationUITest.php b/core/modules/taxonomy/src/Tests/TermTranslationUITest.php
index fa9652def5711c2d4c01f9dc8d597b17066a1592..5e82ffc4fded30f99a844c8ce5cd42ddac8506eb 100644
--- a/core/modules/taxonomy/src/Tests/TermTranslationUITest.php
+++ b/core/modules/taxonomy/src/Tests/TermTranslationUITest.php
@@ -25,7 +25,7 @@ class TermTranslationUITest extends ContentTranslationUITestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'taxonomy');
+  public static $modules = ['language', 'content_translation', 'taxonomy'];
 
   protected function setUp() {
     $this->entityTypeId = 'taxonomy_term';
@@ -54,14 +54,14 @@ protected function setupBundle() {
    * {@inheritdoc}
    */
   protected function getTranslatorPermissions() {
-    return array_merge(parent::getTranslatorPermissions(), array('administer taxonomy'));
+    return array_merge(parent::getTranslatorPermissions(), ['administer taxonomy']);
   }
 
   /**
    * {@inheritdoc}
    */
   protected function getNewEntityValues($langcode) {
-    return array('name' => $this->randomMachineName()) + parent::getNewEntityValues($langcode);
+    return ['name' => $this->randomMachineName()] + parent::getNewEntityValues($langcode);
   }
 
   /**
@@ -73,7 +73,7 @@ protected function getEditValues($values, $langcode, $new = FALSE) {
     // To be able to post values for the configurable base fields (name,
     // description) have to be suffixed with [0][value].
     foreach ($edit as $property => $value) {
-      foreach (array('name', 'description') as $key) {
+      foreach (['name', 'description'] as $key) {
         if ($property == $key) {
           $edit[$key . '[0][value]'] = $value;
           unset($edit[$property]);
@@ -91,7 +91,7 @@ public function testTranslationUI() {
 
     // Make sure that no row was inserted for taxonomy vocabularies which do
     // not have translations enabled.
-    $rows = db_query('SELECT tid, count(tid) AS count FROM {taxonomy_term_field_data} WHERE vid <> :vid GROUP BY tid', array(':vid' => $this->bundle))->fetchAll();
+    $rows = db_query('SELECT tid, count(tid) AS count FROM {taxonomy_term_field_data} WHERE vid <> :vid GROUP BY tid', [':vid' => $this->bundle])->fetchAll();
     foreach ($rows as $row) {
       $this->assertTrue($row->count < 2, 'Term does not have translations.');
     }
@@ -103,9 +103,9 @@ public function testTranslationUI() {
   function testTranslateLinkVocabularyAdminPage() {
     $this->drupalLogin($this->drupalCreateUser(array_merge(parent::getTranslatorPermissions(), ['access administration pages', 'administer taxonomy'])));
 
-    $values = array(
+    $values = [
       'name' => $this->randomMachineName(),
-    );
+    ];
     $translatable_tid = $this->createEntity($values, $this->langcodes[0], $this->vocabulary->id());
 
     // Create an untranslatable vocabulary.
@@ -118,9 +118,9 @@ function testTranslateLinkVocabularyAdminPage() {
     ]);
     $untranslatable_vocabulary->save();
 
-    $values = array(
+    $values = [
       'name' => $this->randomMachineName(),
-    );
+    ];
     $untranslatable_tid = $this->createEntity($values, $this->langcodes[0], $untranslatable_vocabulary->id());
 
     // Verify translation links.
@@ -148,14 +148,14 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
-        $title = t('@title [%language translation]', array(
+        $title = t('@title [%language translation]', [
           '@title' => $entity->getTranslation($langcode)->label(),
           '%language' => $languages[$langcode]->getName(),
-        ));
+        ]);
         $this->assertRaw($title);
       }
     }
diff --git a/core/modules/taxonomy/src/Tests/ThemeTest.php b/core/modules/taxonomy/src/Tests/ThemeTest.php
index 54ad6e4622ea8414c0a71774ca697a95df912add..fc7f2cfcdc2f87564500780034d3edae54bfa78a 100644
--- a/core/modules/taxonomy/src/Tests/ThemeTest.php
+++ b/core/modules/taxonomy/src/Tests/ThemeTest.php
@@ -14,7 +14,7 @@ protected function setUp() {
 
     // Make sure we are using distinct default and administrative themes for
     // the duration of these tests.
-    \Drupal::service('theme_handler')->install(array('bartik', 'seven'));
+    \Drupal::service('theme_handler')->install(['bartik', 'seven']);
     $this->config('system.theme')
       ->set('default', 'bartik')
       ->set('admin', 'seven')
@@ -22,7 +22,7 @@ protected function setUp() {
 
     // Create and log in as a user who has permission to add and edit taxonomy
     // terms and view the administrative theme.
-    $admin_user = $this->drupalCreateUser(array('administer taxonomy', 'view the administration theme'));
+    $admin_user = $this->drupalCreateUser(['administer taxonomy', 'view the administration theme']);
     $this->drupalLogin($admin_user);
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Views/RelationshipNodeTermDataTest.php b/core/modules/taxonomy/src/Tests/Views/RelationshipNodeTermDataTest.php
index c38c45c39e66fb3e5939e6e4afc7a3da0f853bfa..e76d81580f34971515949098a8a041ca596354e2 100644
--- a/core/modules/taxonomy/src/Tests/Views/RelationshipNodeTermDataTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/RelationshipNodeTermDataTest.php
@@ -16,7 +16,7 @@ class RelationshipNodeTermDataTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_taxonomy_node_term_data');
+  public static $testViews = ['test_taxonomy_node_term_data'];
 
   function testViewsHandlerRelationshipNodeTermData() {
     $view = Views::getView('test_taxonomy_node_term_data');
@@ -30,16 +30,16 @@ function testViewsHandlerRelationshipNodeTermData() {
       ],
     ];
     $this->assertIdentical($expected, $view->getDependencies());
-    $this->executeView($view, array($this->term1->id(), $this->term2->id()));
-    $expected_result = array(
-      array(
+    $this->executeView($view, [$this->term1->id(), $this->term2->id()]);
+    $expected_result = [
+      [
         'nid' => $this->nodes[1]->id(),
-      ),
-      array(
+      ],
+      [
         'nid' => $this->nodes[0]->id(),
-      ),
-    );
-    $column_map = array('nid' => 'nid');
+      ],
+    ];
+    $column_map = ['nid' => 'nid'];
     $this->assertIdenticalResultset($view, $expected_result, $column_map);
 
     // Change the view to test relation limited by vocabulary.
@@ -51,7 +51,7 @@ function testViewsHandlerRelationshipNodeTermData() {
     // Tests \Drupal\taxonomy\Plugin\views\relationship\NodeTermData::calculateDependencies().
     $expected['config'][] = 'taxonomy.vocabulary.views_testing_tags';
     $this->assertIdentical($expected, $view->getDependencies());
-    $this->executeView($view, array($this->term1->id(), $this->term2->id()));
+    $this->executeView($view, [$this->term1->id(), $this->term2->id()]);
     $this->assertIdenticalResultset($view, $expected_result, $column_map);
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Views/RelationshipRepresentativeNodeTest.php b/core/modules/taxonomy/src/Tests/Views/RelationshipRepresentativeNodeTest.php
index d049f8228214596097ccd60a26025c14ee418adc..aa85c9e5b6e71413b12d537f709aacc3c3b601a0 100644
--- a/core/modules/taxonomy/src/Tests/Views/RelationshipRepresentativeNodeTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/RelationshipRepresentativeNodeTest.php
@@ -16,7 +16,7 @@ class RelationshipRepresentativeNodeTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_groupwise_term');
+  public static $testViews = ['test_groupwise_term'];
 
   /**
    * Tests the relationship.
@@ -24,17 +24,17 @@ class RelationshipRepresentativeNodeTest extends TaxonomyTestBase {
   public function testRelationship() {
     $view = Views::getView('test_groupwise_term');
     $this->executeView($view);
-    $map = array('node_field_data_taxonomy_term_field_data_nid' => 'nid', 'tid' => 'tid');
-    $expected_result = array(
-      array(
+    $map = ['node_field_data_taxonomy_term_field_data_nid' => 'nid', 'tid' => 'tid'];
+    $expected_result = [
+      [
         'nid' => $this->nodes[1]->id(),
         'tid' => $this->term2->id(),
-      ),
-      array(
+      ],
+      [
         'nid' => $this->nodes[1]->id(),
         'tid' => $this->term1->id(),
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $map);
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyDefaultArgumentTest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyDefaultArgumentTest.php
index c08266f12c1b92d2c8b9c1307e2408364c88ae67..8b263b4f6192f962a9ce143684af7038901a0eba 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyDefaultArgumentTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyDefaultArgumentTest.php
@@ -19,7 +19,7 @@ class TaxonomyDefaultArgumentTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $testViews = array('taxonomy_default_argument_test');
+  public static $testViews = ['taxonomy_default_argument_test'];
 
   /**
    * Tests the relationship.
@@ -37,7 +37,7 @@ public function testNodePath() {
     $view->setResponse($response);
 
     $view->initHandlers();
-    $expected = implode(',', array($this->term1->id(), $this->term2->id()));
+    $expected = implode(',', [$this->term1->id(), $this->term2->id()]);
     $this->assertEqual($expected, $view->argument['tid']->getDefaultArgument());
     $view->destroy();
   }
@@ -68,7 +68,7 @@ public function testNodePathWithViewSelection() {
     $view->setResponse($response);
 
     $view->initHandlers();
-    $expected = implode(',', array($this->term1->id(), $this->term2->id()));
+    $expected = implode(',', [$this->term1->id(), $this->term2->id()]);
     $this->assertEqual($expected, $view->argument['tid']->getDefaultArgument());
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldAllTermsTest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldAllTermsTest.php
index 75894ce43321fdd78ae3b86babb9d9ad02d13c06..a75f16ae9323731448279ffd8be719182dd0ee46 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldAllTermsTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldAllTermsTest.php
@@ -17,7 +17,7 @@ class TaxonomyFieldAllTermsTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $testViews = array('taxonomy_all_terms_test');
+  public static $testViews = ['taxonomy_all_terms_test'];
 
   /**
    * Tests the "all terms" field handler.
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldFilterTest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldFilterTest.php
index fb0c0df2d159cf365ae2440ed0ea4582c3379726..2e9602d892bf8d5e0abc36653a0ab819a222653b 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldFilterTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldFilterTest.php
@@ -22,14 +22,14 @@ class TaxonomyFieldFilterTest extends ViewTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language', 'taxonomy', 'taxonomy_test_views', 'text', 'views', 'node');
+  public static $modules = ['language', 'taxonomy', 'taxonomy_test_views', 'text', 'views', 'node'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_field_filters');
+  public static $testViews = ['test_field_filters'];
 
   /**
    * The vocabulary used for creating terms.
@@ -53,11 +53,11 @@ function setUp() {
     ConfigurableLanguage::createFromLangcode('es')->save();
 
     // Set up term names.
-    $this->termNames = array(
+    $this->termNames = [
       'en' => 'Food in Paris',
       'es' => 'Comida en Paris',
       'fr' => 'Nouriture en Paris',
-    );
+    ];
 
     // Create a vocabulary.
     $this->vocabulary = Vocabulary::create([
@@ -67,11 +67,11 @@ function setUp() {
     $this->vocabulary->save();
 
     // Add a translatable field to the vocabulary.
-    $field = FieldStorageConfig::create(array(
+    $field = FieldStorageConfig::create([
       'field_name' => 'field_foo',
       'entity_type' => 'taxonomy_term',
       'type' => 'text',
-    ));
+    ]);
     $field->save();
     FieldConfig::create([
       'field_name' => 'field_foo',
@@ -81,9 +81,9 @@ function setUp() {
     ])->save();
 
     // Create term with translations.
-    $taxonomy = $this->createTermWithProperties(array('name' => $this->termNames['en'], 'langcode' => 'en', 'description' => $this->termNames['en'], 'field_foo' => $this->termNames['en']));
-    foreach (array('es', 'fr') as $langcode) {
-      $translation = $taxonomy->addTranslation($langcode, array('name' => $this->termNames[$langcode]));
+    $taxonomy = $this->createTermWithProperties(['name' => $this->termNames['en'], 'langcode' => 'en', 'description' => $this->termNames['en'], 'field_foo' => $this->termNames['en']]);
+    foreach (['es', 'fr'] as $langcode) {
+      $translation = $taxonomy->addTranslation($langcode, ['name' => $this->termNames[$langcode]]);
       $translation->description->value = $this->termNames[$langcode];
       $translation->field_foo->value = $this->termNames[$langcode];
     }
@@ -91,7 +91,7 @@ function setUp() {
 
     Views::viewsData()->clear();
 
-    ViewTestData::createTestViews(get_class($this), array('taxonomy_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['taxonomy_test_views']);
     $this->container->get('router.builder')->rebuild();
   }
 
@@ -101,27 +101,27 @@ function setUp() {
   public function testFilters() {
     // Test the name filter page, which filters for name contains 'Comida'.
     // Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-name-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida name filter');
+    $this->assertPageCounts('test-name-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida name filter');
 
     // Test the description filter page, which filters for description contains
     // 'Comida'. Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-desc-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida description filter');
+    $this->assertPageCounts('test-desc-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida description filter');
 
     // Test the field filter page, which filters for field_foo contains
     // 'Comida'. Should show just the Spanish translation, once.
-    $this->assertPageCounts('test-field-filter', array('es' => 1, 'fr' => 0, 'en' => 0), 'Comida field filter');
+    $this->assertPageCounts('test-field-filter', ['es' => 1, 'fr' => 0, 'en' => 0], 'Comida field filter');
 
     // Test the name Paris filter page, which filters for name contains
     // 'Paris'. Should show each translation once.
-    $this->assertPageCounts('test-name-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris name filter');
+    $this->assertPageCounts('test-name-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris name filter');
 
     // Test the description Paris page, which filters for description contains
     // 'Paris'. Should show each translation, once.
-    $this->assertPageCounts('test-desc-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris description filter');
+    $this->assertPageCounts('test-desc-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris description filter');
 
     // Test the field Paris filter page, which filters for field_foo contains
     // 'Paris'. Should show each translation once.
-    $this->assertPageCounts('test-field-paris', array('es' => 1, 'fr' => 1, 'en' => 1), 'Paris field filter');
+    $this->assertPageCounts('test-field-paris', ['es' => 1, 'fr' => 1, 'en' => 1], 'Paris field filter');
 
   }
 
@@ -163,12 +163,12 @@ protected function createTermWithProperties($properties) {
     $filter_formats = filter_formats();
     $format = array_pop($filter_formats);
 
-    $properties += array(
+    $properties += [
       'name' => $this->randomMachineName(),
       'description' => $this->randomMachineName(),
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
       'field_foo' => $this->randomMachineName(),
-    );
+    ];
 
     $term = Term::create([
       'name' => $properties['name'],
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldTidTest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldTidTest.php
index 6480491fc76402933ca2d53c4a3fcde361aef253..51489ac7951f75a600f0f96db1e56ebd50580cf9 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldTidTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyFieldTidTest.php
@@ -17,7 +17,7 @@ class TaxonomyFieldTidTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_taxonomy_tid_field');
+  public static $testViews = ['test_taxonomy_tid_field'];
 
   function testViewsHandlerTidField() {
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyIndexTidFilterTest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyIndexTidFilterTest.php
index 9935aa9647588a08004939a7d850271480e9649a..aa5054feb3136b3a1b2f6cb7127e9a91e95d84b5 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyIndexTidFilterTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyIndexTidFilterTest.php
@@ -58,7 +58,7 @@ protected function setUp() {
     $term->save();
     $this->terms[$term->id()] = $term;
 
-    ViewTestData::createTestViews(get_class($this), array('taxonomy_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['taxonomy_test_views']);
   }
 
   /**
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyIndexTidUiTest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyIndexTidUiTest.php
index 7dff50a4862732c5cec0878664cc4e72d31a6b99..efa51916ddcb42d48651cde0d3427896f8606f58 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyIndexTidUiTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyIndexTidUiTest.php
@@ -24,7 +24,7 @@ class TaxonomyIndexTidUiTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_filter_taxonomy_index_tid', 'test_taxonomy_term_name');
+  public static $testViews = ['test_filter_taxonomy_index_tid', 'test_taxonomy_term_name'];
 
   /**
    * Modules to enable.
@@ -71,7 +71,7 @@ protected function setUp() {
         $term->save();
       }
     }
-    ViewTestData::createTestViews(get_class($this), array('taxonomy_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['taxonomy_test_views']);
 
     Vocabulary::create([
       'vid' => 'empty_vocabulary',
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyParentUITest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyParentUITest.php
index c79a406cfe153b5cb637b06ef584253c476777c1..a57a09a7ad6bb7d3f609c9105c48993eccc88000 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyParentUITest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyParentUITest.php
@@ -18,14 +18,14 @@ class TaxonomyParentUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_taxonomy_parent');
+  public static $testViews = ['test_taxonomy_parent'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'taxonomy_test_views');
+  public static $modules = ['taxonomy', 'taxonomy_test_views'];
 
   /**
    * {@inheritdoc}
@@ -33,7 +33,7 @@ class TaxonomyParentUITest extends UITestBase {
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('taxonomy_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['taxonomy_test_views']);
   }
 
   /**
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyRelationshipTest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyRelationshipTest.php
index bada7fae872b1e7392eed3d66d6c39a4d6e9718b..7024e64b44c6066bc69ca7c333ff2b299f32d7dc 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyRelationshipTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyRelationshipTest.php
@@ -18,14 +18,14 @@ class TaxonomyRelationshipTest extends TaxonomyTestBase {
    *
    * @var \Drupal\taxonomy\TermInterface[]
    */
-  protected $terms = array();
+  protected $terms = [];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_taxonomy_term_relationship');
+  public static $testViews = ['test_taxonomy_term_relationship'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyTermViewTest.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyTermViewTest.php
index ef6da478f1faa17d3737b6dc39584e4302894fd8..bfd65cf46fdc70090a16f7fa69033a86eeecbfe6 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyTermViewTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyTermViewTest.php
@@ -21,7 +21,7 @@ class TaxonomyTermViewTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'views');
+  public static $modules = ['taxonomy', 'views'];
 
   /**
    * An user with permissions to administer taxonomy.
@@ -51,23 +51,23 @@ protected function setUp() {
 
     $this->fieldName1 = Unicode::strtolower($this->randomMachineName());
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $this->fieldName1, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($this->fieldName1, array(
+      ->setComponent($this->fieldName1, [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
     entity_get_display('node', 'article', 'default')
-      ->setComponent($this->fieldName1, array(
+      ->setComponent($this->fieldName1, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
   }
 
@@ -79,7 +79,7 @@ public function testTaxonomyTermView() {
     $term = $this->createTerm();
 
     // Post an article.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $original_title = $this->randomMachineName();
     $edit['body[0][value]'] = $this->randomMachineName();
     $edit["{$this->fieldName1}[]"] = $term->id();
@@ -90,7 +90,7 @@ public function testTaxonomyTermView() {
     $this->assertText($term->label());
     $this->assertText($node->label());
 
-    \Drupal::service('module_installer')->install(array('language', 'content_translation'));
+    \Drupal::service('module_installer')->install(['language', 'content_translation']);
     $language = ConfigurableLanguage::createFromLangcode('ur');
     $language->save();
     // Enable translation for the article content type and ensure the change is
diff --git a/core/modules/taxonomy/src/Tests/Views/TaxonomyTestBase.php b/core/modules/taxonomy/src/Tests/Views/TaxonomyTestBase.php
index dc5755993cd8a272177c22ce453b239296eadadf..6ff5514188e9d6453389ca2c9a301aaf04c0e4af 100644
--- a/core/modules/taxonomy/src/Tests/Views/TaxonomyTestBase.php
+++ b/core/modules/taxonomy/src/Tests/Views/TaxonomyTestBase.php
@@ -22,14 +22,14 @@ abstract class TaxonomyTestBase extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'taxonomy_test_views');
+  public static $modules = ['taxonomy', 'taxonomy_test_views'];
 
   /**
    * Stores the nodes used for the different tests.
    *
    * @var \Drupal\node\NodeInterface[]
    */
-  protected $nodes = array();
+  protected $nodes = [];
 
   /**
    * The vocabulary used for creating terms.
@@ -60,13 +60,13 @@ protected function setUp($import_test_views = TRUE) {
     $this->mockStandardInstall();
 
     if ($import_test_views) {
-      ViewTestData::createTestViews(get_class($this), array('taxonomy_test_views'));
+      ViewTestData::createTestViews(get_class($this), ['taxonomy_test_views']);
     }
 
     $this->term1 = $this->createTerm();
     $this->term2 = $this->createTerm();
 
-    $node = array();
+    $node = [];
     $node['type'] = 'article';
     $node['field_views_testing_tags'][]['target_id'] = $this->term1->id();
     $node['field_views_testing_tags'][]['target_id'] = $this->term2->id();
@@ -80,9 +80,9 @@ protected function setUp($import_test_views = TRUE) {
    * @see https://www.drupal.org/node/1708692
    */
   protected function mockStandardInstall() {
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'article',
-    ));
+    ]);
     // Create the vocabulary for the tag field.
     $this->vocabulary = Vocabulary::create([
       'name' => 'Views testing tags',
@@ -91,32 +91,32 @@ protected function mockStandardInstall() {
     $this->vocabulary->save();
     $field_name = 'field_' . $this->vocabulary->id();
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $field_name, 'Tags', 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'entity_reference_autocomplete_tags',
         'weight' => -4,
-      ))
+      ])
       ->save();
 
     entity_get_display('node', 'article', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'entity_reference_label',
         'weight' => 10,
-      ))
+      ])
       ->save();
     entity_get_display('node', 'article', 'teaser')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'entity_reference_label',
         'weight' => 10,
-      ))
+      ])
       ->save();
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Views/TermNameFieldTest.php b/core/modules/taxonomy/src/Tests/Views/TermNameFieldTest.php
index 2effe722b9e5f74e4d66d62602780fd622e37bd4..98d1ab4b48f435bd2047fecdc91236021da2408d 100644
--- a/core/modules/taxonomy/src/Tests/Views/TermNameFieldTest.php
+++ b/core/modules/taxonomy/src/Tests/Views/TermNameFieldTest.php
@@ -16,7 +16,7 @@ class TermNameFieldTest extends TaxonomyTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $testViews = array('test_taxonomy_term_name');
+  public static $testViews = ['test_taxonomy_term_name'];
 
   /**
    * Tests term name field plugin functionality.
diff --git a/core/modules/taxonomy/src/Tests/VocabularyUiTest.php b/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
index 76fcac2bb08c92437fdad39fc87f9b9c5eec983d..e3710d610b24b3c44bd09e4a80619bc4a92baffb 100644
--- a/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
+++ b/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
@@ -37,13 +37,13 @@ function testVocabularyInterface() {
 
     // Create a new vocabulary.
     $this->clickLink(t('Add vocabulary'));
-    $edit = array();
+    $edit = [];
     $vid = Unicode::strtolower($this->randomMachineName());
     $edit['name'] = $this->randomMachineName();
     $edit['description'] = $this->randomMachineName();
     $edit['vid'] = $vid;
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertRaw(t('Created new vocabulary %name.', array('%name' => $edit['name'])), 'Vocabulary created successfully.');
+    $this->assertRaw(t('Created new vocabulary %name.', ['%name' => $edit['name']]), 'Vocabulary created successfully.');
 
     // Edit the vocabulary.
     $this->drupalGet('admin/structure/taxonomy');
@@ -51,7 +51,7 @@ function testVocabularyInterface() {
     $this->assertText($edit['description'], 'Vocabulary description found in the vocabulary overview listing.');
     $this->assertLinkByHref(Url::fromRoute('entity.taxonomy_term.add_form', ['taxonomy_vocabulary' => $edit['vid']])->toString());
     $this->clickLink(t('Edit vocabulary'));
-    $edit = array();
+    $edit = [];
     $edit['name'] = $this->randomMachineName();
     $edit['description'] = $this->randomMachineName();
     $this->drupalPostForm(NULL, $edit, t('Save'));
@@ -70,15 +70,15 @@ function testVocabularyInterface() {
     $this->assertText(t('The machine-readable name must contain only lowercase letters, numbers, and underscores.'));
 
     // Ensure that vocabulary titles are escaped properly.
-    $edit = array();
+    $edit = [];
     $edit['name'] = 'Don\'t Panic';
     $edit['description'] = $this->randomMachineName();
     $edit['vid'] = 'don_t_panic';
     $this->drupalPostForm('admin/structure/taxonomy/add', $edit, t('Save'));
 
     $site_name = $this->config('system.site')->get('name');
-    $this->assertTitle(t('Don\'t Panic | @site-name', array('@site-name' => $site_name)), 'The page title contains the escaped character.');
-    $this->assertNoTitle(t('Don&#039;t Panic | @site-name', array('@site-name' => $site_name)), 'The page title does not contain an encoded character.');
+    $this->assertTitle(t('Don\'t Panic | @site-name', ['@site-name' => $site_name]), 'The page title contains the escaped character.');
+    $this->assertNoTitle(t('Don&#039;t Panic | @site-name', ['@site-name' => $site_name]), 'The page title does not contain an encoded character.');
   }
 
   /**
@@ -91,7 +91,7 @@ function testTaxonomyAdminChangingWeights() {
     }
     // Get all vocabularies and change their weights.
     $vocabularies = Vocabulary::loadMultiple();
-    $edit = array();
+    $edit = [];
     foreach ($vocabularies as $key => $vocabulary) {
       $weight = -$vocabulary->get('weight');
       $vocabularies[$key]->set('weight', $weight);
@@ -132,10 +132,10 @@ function testTaxonomyAdminNoVocabularies() {
   function testTaxonomyAdminDeletingVocabulary() {
     // Create a vocabulary.
     $vid = Unicode::strtolower($this->randomMachineName());
-    $edit = array(
+    $edit = [
       'name' => $this->randomMachineName(),
       'vid' => $vid,
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/add', $edit, t('Save'));
     $this->assertText(t('Created new vocabulary'), 'New vocabulary was created.');
 
@@ -147,12 +147,12 @@ function testTaxonomyAdminDeletingVocabulary() {
     // Delete the vocabulary.
     $this->drupalGet('admin/structure/taxonomy/manage/' . $vocabulary->id());
     $this->clickLink(t('Delete'));
-    $this->assertRaw(t('Are you sure you want to delete the vocabulary %name?', array('%name' => $vocabulary->label())), '[confirm deletion] Asks for confirmation.');
+    $this->assertRaw(t('Are you sure you want to delete the vocabulary %name?', ['%name' => $vocabulary->label()]), '[confirm deletion] Asks for confirmation.');
     $this->assertText(t('Deleting a vocabulary will delete all the terms in it. This action cannot be undone.'), '[confirm deletion] Inform that all terms will be deleted.');
 
     // Confirm deletion.
     $this->drupalPostForm(NULL, NULL, t('Delete'));
-    $this->assertRaw(t('Deleted vocabulary %name.', array('%name' => $vocabulary->label())), 'Vocabulary deleted.');
+    $this->assertRaw(t('Deleted vocabulary %name.', ['%name' => $vocabulary->label()]), 'Vocabulary deleted.');
     $this->container->get('entity.manager')->getStorage('taxonomy_vocabulary')->resetCache();
     $this->assertFalse(Vocabulary::load($vid), 'Vocabulary not found.');
   }
diff --git a/core/modules/taxonomy/src/VocabularyForm.php b/core/modules/taxonomy/src/VocabularyForm.php
index 1868ddc38f45a002df169613f8cd1162110e549d..63f0ccb8ab5f7100dee63c3b7348e64790d8eaae 100644
--- a/core/modules/taxonomy/src/VocabularyForm.php
+++ b/core/modules/taxonomy/src/VocabularyForm.php
@@ -52,59 +52,59 @@ public function form(array $form, FormStateInterface $form_state) {
       $form['#title'] = $this->t('Edit vocabulary');
     }
 
-    $form['name'] = array(
+    $form['name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Name'),
       '#default_value' => $vocabulary->label(),
       '#maxlength' => 255,
       '#required' => TRUE,
-    );
-    $form['vid'] = array(
+    ];
+    $form['vid'] = [
       '#type' => 'machine_name',
       '#default_value' => $vocabulary->id(),
       '#maxlength' => EntityTypeInterface::BUNDLE_MAX_LENGTH,
-      '#machine_name' => array(
-        'exists' => array($this, 'exists'),
-        'source' => array('name'),
-      ),
-    );
-    $form['description'] = array(
+      '#machine_name' => [
+        'exists' => [$this, 'exists'],
+        'source' => ['name'],
+      ],
+    ];
+    $form['description'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Description'),
       '#default_value' => $vocabulary->getDescription(),
-    );
+    ];
 
     // $form['langcode'] is not wrapped in an
     // if ($this->moduleHandler->moduleExists('language')) check because the
     // language_select form element works also without the language module being
     // installed. https://www.drupal.org/node/1749954 documents the new element.
-    $form['langcode'] = array(
+    $form['langcode'] = [
       '#type' => 'language_select',
       '#title' => $this->t('Vocabulary language'),
       '#languages' => LanguageInterface::STATE_ALL,
       '#default_value' => $vocabulary->language()->getId(),
-    );
+    ];
     if ($this->moduleHandler->moduleExists('language')) {
-      $form['default_terms_language'] = array(
+      $form['default_terms_language'] = [
         '#type' => 'details',
         '#title' => $this->t('Terms language'),
         '#open' => TRUE,
-      );
-      $form['default_terms_language']['default_language'] = array(
+      ];
+      $form['default_terms_language']['default_language'] = [
         '#type' => 'language_configuration',
-        '#entity_information' => array(
+        '#entity_information' => [
           'entity_type' => 'taxonomy_term',
           'bundle' => $vocabulary->id(),
-        ),
+        ],
         '#default_value' => ContentLanguageSettings::loadByEntityTypeBundle('taxonomy_term', $vocabulary->id()),
-      );
+      ];
     }
     // Set the hierarchy to "multiple parents" by default. This simplifies the
     // vocabulary form and standardizes the term form.
-    $form['hierarchy'] = array(
+    $form['hierarchy'] = [
       '#type' => 'value',
       '#value' => '0',
-    );
+    ];
 
     $form = parent::form($form, $form_state);
     return $this->protectBundleIdElement($form);
@@ -123,14 +123,14 @@ public function save(array $form, FormStateInterface $form_state) {
     $edit_link = $this->entity->link($this->t('Edit'));
     switch ($status) {
       case SAVED_NEW:
-        drupal_set_message($this->t('Created new vocabulary %name.', array('%name' => $vocabulary->label())));
-        $this->logger('taxonomy')->notice('Created new vocabulary %name.', array('%name' => $vocabulary->label(), 'link' => $edit_link));
+        drupal_set_message($this->t('Created new vocabulary %name.', ['%name' => $vocabulary->label()]));
+        $this->logger('taxonomy')->notice('Created new vocabulary %name.', ['%name' => $vocabulary->label(), 'link' => $edit_link]);
         $form_state->setRedirectUrl($vocabulary->urlInfo('overview-form'));
         break;
 
       case SAVED_UPDATED:
-        drupal_set_message($this->t('Updated vocabulary %name.', array('%name' => $vocabulary->label())));
-        $this->logger('taxonomy')->notice('Updated vocabulary %name.', array('%name' => $vocabulary->label(), 'link' => $edit_link));
+        drupal_set_message($this->t('Updated vocabulary %name.', ['%name' => $vocabulary->label()]));
+        $this->logger('taxonomy')->notice('Updated vocabulary %name.', ['%name' => $vocabulary->label(), 'link' => $edit_link]);
         $form_state->setRedirectUrl($vocabulary->urlInfo('collection'));
         break;
     }
diff --git a/core/modules/taxonomy/src/VocabularyListBuilder.php b/core/modules/taxonomy/src/VocabularyListBuilder.php
index 9c24311f1dc4805db9124832568c0561bbc9d59c..8503c288a90637be0488cfdbefac0bd46e2e5dc9 100644
--- a/core/modules/taxonomy/src/VocabularyListBuilder.php
+++ b/core/modules/taxonomy/src/VocabularyListBuilder.php
@@ -36,16 +36,16 @@ public function getDefaultOperations(EntityInterface $entity) {
       $operations['edit']['title'] = t('Edit vocabulary');
     }
 
-    $operations['list'] = array(
+    $operations['list'] = [
       'title' => t('List terms'),
       'weight' => 0,
       'url' => $entity->urlInfo('overview-form'),
-    );
-    $operations['add'] = array(
+    ];
+    $operations['add'] = [
       'title' => t('Add terms'),
       'weight' => 10,
       'url' => Url::fromRoute('entity.taxonomy_term.add_form', ['taxonomy_vocabulary' => $entity->id()]),
-    );
+    ];
     unset($operations['delete']);
 
     return $operations;
@@ -80,7 +80,7 @@ public function render() {
       unset($this->weightKey);
     }
     $build = parent::render();
-    $build['table']['#empty'] = t('No vocabularies available. <a href=":link">Add vocabulary</a>.', array(':link' => \Drupal::url('entity.taxonomy_vocabulary.add_form')));
+    $build['table']['#empty'] = t('No vocabularies available. <a href=":link">Add vocabulary</a>.', [':link' => \Drupal::url('entity.taxonomy_vocabulary.add_form')]);
     return $build;
   }
 
@@ -89,7 +89,7 @@ public function render() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $form = parent::buildForm($form, $form_state);
-    $form['vocabularies']['#attributes'] = array('id' => 'taxonomy');
+    $form['vocabularies']['#attributes'] = ['id' => 'taxonomy'];
     $form['actions']['submit']['#value'] = t('Save');
 
     return $form;
diff --git a/core/modules/taxonomy/src/VocabularyStorage.php b/core/modules/taxonomy/src/VocabularyStorage.php
index 4b08b2931f079b301042a2449f15fea6ff6e9b1e..bdbf8938f708e6c590958a3ccc62b391c373017e 100644
--- a/core/modules/taxonomy/src/VocabularyStorage.php
+++ b/core/modules/taxonomy/src/VocabularyStorage.php
@@ -21,7 +21,7 @@ public function resetCache(array $ids = NULL) {
    * {@inheritdoc}
    */
   public function getToplevelTids($vids) {
-    return db_query('SELECT t.tid FROM {taxonomy_term_data} t INNER JOIN {taxonomy_term_hierarchy} th ON th.tid = t.tid WHERE t.vid IN ( :vids[] ) AND th.parent = 0', array(':vids[]' => $vids))->fetchCol();
+    return db_query('SELECT t.tid FROM {taxonomy_term_data} t INNER JOIN {taxonomy_term_hierarchy} th ON th.tid = t.tid WHERE t.vid IN ( :vids[] ) AND th.parent = 0', [':vids[]' => $vids])->fetchCol();
   }
 
 }
diff --git a/core/modules/taxonomy/taxonomy.module b/core/modules/taxonomy/taxonomy.module
index 80884329bd9007e63c913c48c50b70cda3f22041..4a93989ad52fe5817449598730c5baec9706e75f 100644
--- a/core/modules/taxonomy/taxonomy.module
+++ b/core/modules/taxonomy/taxonomy.module
@@ -47,23 +47,23 @@
 function taxonomy_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.taxonomy':
-      $field_ui_url = \Drupal::moduleHandler()->moduleExists('field_ui') ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#';
+      $field_ui_url = \Drupal::moduleHandler()->moduleExists('field_ui') ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#';
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Taxonomy module allows users who have permission to create and edit content to categorize (tag) content of that type. Users who have the <em>Administer vocabularies and terms</em> <a href=":permissions" title="Taxonomy module permissions">permission</a> can add <em>vocabularies</em> that contain a set of related <em>terms</em>. The terms in a vocabulary can either be pre-set by an administrator or built gradually as content is added and edited. Terms may be organized hierarchically if desired.', array(':permissions' => \Drupal::url('user.admin_permissions', array(), array('fragment' => 'module-taxonomy')))) . '</p>';
-      $output .= '<p>' . t('For more information, see the <a href=":taxonomy">online documentation for the Taxonomy module</a>.', array(':taxonomy' => 'https://www.drupal.org/documentation/modules/taxonomy/')) . '</p>';
+      $output .= '<p>' . t('The Taxonomy module allows users who have permission to create and edit content to categorize (tag) content of that type. Users who have the <em>Administer vocabularies and terms</em> <a href=":permissions" title="Taxonomy module permissions">permission</a> can add <em>vocabularies</em> that contain a set of related <em>terms</em>. The terms in a vocabulary can either be pre-set by an administrator or built gradually as content is added and edited. Terms may be organized hierarchically if desired.', [':permissions' => \Drupal::url('user.admin_permissions', [], ['fragment' => 'module-taxonomy'])]) . '</p>';
+      $output .= '<p>' . t('For more information, see the <a href=":taxonomy">online documentation for the Taxonomy module</a>.', [':taxonomy' => 'https://www.drupal.org/documentation/modules/taxonomy/']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing vocabularies') . '</dt>';
-      $output .= '<dd>' . t('Users who have the <em>Administer vocabularies and terms</em> permission can add and edit vocabularies from the <a href=":taxonomy_admin">Taxonomy administration page</a>. Vocabularies can be deleted from their <em>Edit vocabulary</em> page. Users with the <em>Taxonomy term: Administer fields</em> permission may add additional fields for terms in that vocabulary using the <a href=":field_ui">Field UI module</a>.', array(':taxonomy_admin' => \Drupal::url('entity.taxonomy_vocabulary.collection'), ':field_ui' => $field_ui_url)) . '</dd>';
+      $output .= '<dd>' . t('Users who have the <em>Administer vocabularies and terms</em> permission can add and edit vocabularies from the <a href=":taxonomy_admin">Taxonomy administration page</a>. Vocabularies can be deleted from their <em>Edit vocabulary</em> page. Users with the <em>Taxonomy term: Administer fields</em> permission may add additional fields for terms in that vocabulary using the <a href=":field_ui">Field UI module</a>.', [':taxonomy_admin' => \Drupal::url('entity.taxonomy_vocabulary.collection'), ':field_ui' => $field_ui_url]) . '</dd>';
       $output .= '<dt>' . t('Managing terms') . '</dt>';
-      $output .= '<dd>' . t('Users who have the <em>Administer vocabularies and terms</em> permission or the <em>Edit terms</em> permission for a particular vocabulary can add, edit, and organize the terms in a vocabulary from a vocabulary\'s term listing page, which can be accessed by going to the <a href=":taxonomy_admin">Taxonomy administration page</a> and clicking <em>List terms</em> in the <em>Operations</em> column. Users must have the <em>Administer vocabularies and terms</em> permission or the <em>Delete terms</em> permission for a particular vocabulary to delete terms.', array(':taxonomy_admin' => \Drupal::url('entity.taxonomy_vocabulary.collection'))) . ' </dd>';
+      $output .= '<dd>' . t('Users who have the <em>Administer vocabularies and terms</em> permission or the <em>Edit terms</em> permission for a particular vocabulary can add, edit, and organize the terms in a vocabulary from a vocabulary\'s term listing page, which can be accessed by going to the <a href=":taxonomy_admin">Taxonomy administration page</a> and clicking <em>List terms</em> in the <em>Operations</em> column. Users must have the <em>Administer vocabularies and terms</em> permission or the <em>Delete terms</em> permission for a particular vocabulary to delete terms.', [':taxonomy_admin' => \Drupal::url('entity.taxonomy_vocabulary.collection')]) . ' </dd>';
       $output .= '<dt>' . t('Classifying entity content') . '</dt>';
-      $output .= '<dd>' . t('A user with the <em>Administer fields</em> permission for a certain entity type may add <em>Taxonomy term</em> reference fields to the entity type, which will allow entities to be classified using taxonomy terms. See the <a href=":entity_reference">Entity Reference help</a> for more information about reference fields. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them.', array(':field_ui' => $field_ui_url, ':field' => \Drupal::url('help.page', array('name' => 'field')), ':entity_reference' => \Drupal::url('help.page', array('name' => 'entity_reference')))) . '</dd>';
+      $output .= '<dd>' . t('A user with the <em>Administer fields</em> permission for a certain entity type may add <em>Taxonomy term</em> reference fields to the entity type, which will allow entities to be classified using taxonomy terms. See the <a href=":entity_reference">Entity Reference help</a> for more information about reference fields. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them.', [':field_ui' => $field_ui_url, ':field' => \Drupal::url('help.page', ['name' => 'field']), ':entity_reference' => \Drupal::url('help.page', ['name' => 'entity_reference'])]) . '</dd>';
       $output .= '<dt>' . t('Adding new terms during content creation') . '</dt>';
       $output .= '<dd>' . t('Allowing users to add new terms gradually builds a vocabulary as content is added and edited. Users can add new terms if either of the two <em>Autocomplete</em> widgets is chosen for the Taxonomy term reference field in the <em>Manage form display</em> page for the field. You will also need to enable the <em>Create referenced entities if they don\'t already exist</em> option, and restrict the field to one vocabulary.') . '</dd>';
       $output .= '<dt>' . t('Configuring displays and form displays') . '</dt>';
-      $output .= '<dd>' . t('See the <a href=":entity_reference">Entity Reference help</a> page for the field widgets and formatters that can be configured for any reference field on the <em>Manage display</em> and <em>Manage form display</em> pages. Taxonomy additionally provides an <em>RSS category</em> formatter that displays nothing when the entity item is displayed as HTML, but displays an RSS category instead of a list when the entity item is displayed in an RSS feed.', array(':entity_reference' => \Drupal::url('help.page', array('name' => 'entity_reference')))) . '</li>';
+      $output .= '<dd>' . t('See the <a href=":entity_reference">Entity Reference help</a> page for the field widgets and formatters that can be configured for any reference field on the <em>Manage display</em> and <em>Manage form display</em> pages. Taxonomy additionally provides an <em>RSS category</em> formatter that displays nothing when the entity item is displayed as HTML, but displays an RSS category instead of a list when the entity item is displayed in an RSS feed.', [':entity_reference' => \Drupal::url('help.page', ['name' => 'entity_reference'])]) . '</li>';
       $output .= '</ul>';
       $output .= '</dd>';
       $output .= '</dl>';
@@ -77,11 +77,11 @@ function taxonomy_help($route_name, RouteMatchInterface $route_match) {
       $vocabulary = $route_match->getParameter('taxonomy_vocabulary');
       switch ($vocabulary->getHierarchy()) {
         case VocabularyInterface::HIERARCHY_DISABLED:
-          return '<p>' . t('You can reorganize the terms in %capital_name using their drag-and-drop handles, and group terms under a parent term by sliding them under and to the right of the parent.', array('%capital_name' => Unicode::ucfirst($vocabulary->label()), '%name' => $vocabulary->label())) . '</p>';
+          return '<p>' . t('You can reorganize the terms in %capital_name using their drag-and-drop handles, and group terms under a parent term by sliding them under and to the right of the parent.', ['%capital_name' => Unicode::ucfirst($vocabulary->label()), '%name' => $vocabulary->label()]) . '</p>';
         case VocabularyInterface::HIERARCHY_SINGLE:
-          return '<p>' . t('%capital_name contains terms grouped under parent terms. You can reorganize the terms in %capital_name using their drag-and-drop handles.', array('%capital_name' => Unicode::ucfirst($vocabulary->label()), '%name' => $vocabulary->label())) . '</p>';
+          return '<p>' . t('%capital_name contains terms grouped under parent terms. You can reorganize the terms in %capital_name using their drag-and-drop handles.', ['%capital_name' => Unicode::ucfirst($vocabulary->label()), '%name' => $vocabulary->label()]) . '</p>';
         case VocabularyInterface::HIERARCHY_MULTIPLE:
-          return '<p>' . t('%capital_name contains terms with multiple parents. Drag and drop of terms with multiple parents is not supported, but you can re-enable drag-and-drop support by editing each term to include only a single parent.', array('%capital_name' => Unicode::ucfirst($vocabulary->label()))) . '</p>';
+          return '<p>' . t('%capital_name contains terms with multiple parents. Drag and drop of terms with multiple parents is not supported, but you can re-enable drag-and-drop support by editing each term to include only a single parent.', ['%capital_name' => Unicode::ucfirst($vocabulary->label())]) . '</p>';
       }
   }
 }
@@ -90,9 +90,9 @@ function taxonomy_help($route_name, RouteMatchInterface $route_match) {
  * Entity URI callback.
  */
 function taxonomy_term_uri($term) {
-  return new Url('entity.taxonomy_term.canonical', array(
+  return new Url('entity.taxonomy_term.canonical', [
     'taxonomy_term' => $term->id(),
-  ));
+  ]);
 }
 
 /**
@@ -103,24 +103,24 @@ function taxonomy_page_attachments_alter(array &$page) {
   if ($route_match->getRouteName() == 'entity.taxonomy_term.canonical' && ($term = $route_match->getParameter('taxonomy_term')) && $term instanceof TermInterface) {
     foreach ($term->uriRelationships() as $rel) {
       // Set the URI relationships, like canonical.
-      $page['#attached']['html_head_link'][] = array(
-        array(
+      $page['#attached']['html_head_link'][] = [
+        [
           'rel' => $rel,
           'href' => $term->url($rel),
-        ),
+        ],
         TRUE,
-      );
+      ];
 
       // Set the term path as the canonical URL to prevent duplicate content.
       if ($rel == 'canonical') {
         // Set the non-aliased canonical path as a default shortlink.
-        $page['#attached']['html_head_link'][] = array(
-          array(
+        $page['#attached']['html_head_link'][] = [
+          [
             'rel' => 'shortlink',
-            'href' => $term->url($rel, array('alias' => TRUE)),
-          ),
+            'href' => $term->url($rel, ['alias' => TRUE]),
+          ],
           TRUE,
-        );
+        ];
       }
     }
   }
@@ -130,11 +130,11 @@ function taxonomy_page_attachments_alter(array &$page) {
  * Implements hook_theme().
  */
 function taxonomy_theme() {
-  return array(
-    'taxonomy_term' => array(
+  return [
+    'taxonomy_term' => [
       'render element' => 'elements',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -223,7 +223,7 @@ function taxonomy_term_view_multiple(array $terms, $view_mode = 'full', $langcod
  * Implements hook_theme_suggestions_HOOK().
  */
 function taxonomy_theme_suggestions_taxonomy_term(array $variables) {
-  $suggestions = array();
+  $suggestions = [];
 
   /** @var \Drupal\taxonomy\TermInterface $term */
   $term = $variables['elements']['#taxonomy_term'];
@@ -261,7 +261,7 @@ function template_preprocess_taxonomy_term(&$variables) {
   $variables['page'] = $variables['view_mode'] == 'full' && taxonomy_term_is_page($term);
 
   // Helpful $content variable for templates.
-  $variables['content'] = array();
+  $variables['content'] = [];
   foreach (Element::children($variables['elements']) as $key) {
     $variables['content'][$key] = $variables['elements'][$key];
   }
@@ -307,7 +307,7 @@ function taxonomy_vocabulary_get_names() {
   $names = &drupal_static(__FUNCTION__);
 
   if (!isset($names)) {
-    $names = array();
+    $names = [];
     $config_names = \Drupal::configFactory()->listAll('taxonomy.vocabulary.');
     foreach ($config_names as $config_name) {
       $id = substr($config_name, strlen('taxonomy.vocabulary.'));
@@ -333,7 +333,7 @@ function taxonomy_vocabulary_get_names() {
  *   An array of matching term objects.
  */
 function taxonomy_term_load_multiple_by_name($name, $vocabulary = NULL) {
-  $values = array('name' => trim($name));
+  $values = ['name' => trim($name)];
   if (isset($vocabulary)) {
     $vocabularies = taxonomy_vocabulary_get_names();
     if (isset($vocabularies[$vocabulary])) {
@@ -341,7 +341,7 @@ function taxonomy_term_load_multiple_by_name($name, $vocabulary = NULL) {
     }
     else {
       // Return an empty array when filtering by a non-existing vocabulary.
-      return array();
+      return [];
     }
   }
   return entity_load_multiple_by_properties('taxonomy_term', $values);
@@ -436,7 +436,7 @@ function taxonomy_term_load($tid) {
  * @see \Drupal\Component\Utility\Tags::explode()
  */
 function taxonomy_implode_tags($tags, $vid = NULL) {
-  $typed_tags = array();
+  $typed_tags = [];
   foreach ($tags as $tag) {
     // Extract terms belonging to the vocabulary in question.
     if (!isset($vid) || $tag->bundle() == $vid) {
@@ -510,7 +510,7 @@ function taxonomy_build_node_index($node) {
   // We only maintain the taxonomy index for published nodes.
   if ($status && $node->isDefaultRevision()) {
     // Collect a unique list of all the term IDs from all node fields.
-    $tid_all = array();
+    $tid_all = [];
     $entity_reference_class = 'Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem';
     foreach ($node->getFieldDefinitions() as $field) {
       $field_name = $field->getName();
@@ -530,8 +530,8 @@ function taxonomy_build_node_index($node) {
     if (!empty($tid_all)) {
       foreach ($tid_all as $tid) {
         db_merge('taxonomy_index')
-          ->key(array('nid' => $node->id(), 'tid' => $tid, 'status' => $node->isPublished()))
-          ->fields(array('sticky' => $sticky, 'created' => $node->getCreatedTime()))
+          ->key(['nid' => $node->id(), 'tid' => $tid, 'status' => $node->isPublished()])
+          ->fields(['sticky' => $sticky, 'created' => $node->getCreatedTime()])
           ->execute();
       }
     }
diff --git a/core/modules/taxonomy/taxonomy.tokens.inc b/core/modules/taxonomy/taxonomy.tokens.inc
index 20251f224c69af7a42d859776160343dc2d6989c..211a1214451b97034f7259423213c252902b0879 100644
--- a/core/modules/taxonomy/taxonomy.tokens.inc
+++ b/core/modules/taxonomy/taxonomy.tokens.inc
@@ -12,80 +12,80 @@
  * Implements hook_token_info().
  */
 function taxonomy_token_info() {
-  $types['term'] = array(
+  $types['term'] = [
     'name' => t("Taxonomy terms"),
     'description' => t("Tokens related to taxonomy terms."),
     'needs-data' => 'term',
-  );
-  $types['vocabulary'] = array(
+  ];
+  $types['vocabulary'] = [
     'name' => t("Vocabularies"),
     'description' => t("Tokens related to taxonomy vocabularies."),
     'needs-data' => 'vocabulary',
-  );
+  ];
 
   // Taxonomy term related variables.
-  $term['tid'] = array(
+  $term['tid'] = [
     'name' => t("Term ID"),
     'description' => t("The unique ID of the taxonomy term."),
-  );
-  $term['name'] = array(
+  ];
+  $term['name'] = [
     'name' => t("Name"),
     'description' => t("The name of the taxonomy term."),
-  );
-  $term['description'] = array(
+  ];
+  $term['description'] = [
     'name' => t("Description"),
     'description' => t("The optional description of the taxonomy term."),
-  );
-  $term['node-count'] = array(
+  ];
+  $term['node-count'] = [
     'name' => t("Node count"),
     'description' => t("The number of nodes tagged with the taxonomy term."),
-  );
-  $term['url'] = array(
+  ];
+  $term['url'] = [
     'name' => t("URL"),
     'description' => t("The URL of the taxonomy term."),
-  );
+  ];
 
   // Taxonomy vocabulary related variables.
-  $vocabulary['vid'] = array(
+  $vocabulary['vid'] = [
     'name' => t("Vocabulary ID"),
     'description' => t("The unique ID of the taxonomy vocabulary."),
-  );
-  $vocabulary['name'] = array(
+  ];
+  $vocabulary['name'] = [
     'name' => t("Name"),
     'description' => t("The name of the taxonomy vocabulary."),
-  );
-  $vocabulary['description'] = array(
+  ];
+  $vocabulary['description'] = [
     'name' => t("Description"),
     'description' => t("The optional description of the taxonomy vocabulary."),
-  );
-  $vocabulary['node-count'] = array(
+  ];
+  $vocabulary['node-count'] = [
     'name' => t("Node count"),
     'description' => t("The number of nodes tagged with terms belonging to the taxonomy vocabulary."),
-  );
-  $vocabulary['term-count'] = array(
+  ];
+  $vocabulary['term-count'] = [
     'name' => t("Term count"),
     'description' => t("The number of terms belonging to the taxonomy vocabulary."),
-  );
+  ];
 
   // Chained tokens for taxonomies
-  $term['vocabulary'] = array(
+  $term['vocabulary'] = [
     'name' => t("Vocabulary"),
     'description' => t("The vocabulary the taxonomy term belongs to."),
     'type' => 'vocabulary',
-  );
-  $term['parent'] = array(
+  ];
+  $term['parent'] = [
     'name' => t("Parent term"),
     'description' => t("The parent term of the taxonomy term, if one exists."),
     'type' => 'term',
-  );
+  ];
 
-  return array(
+  return [
     'types' => $types,
-    'tokens' => array(
+    'tokens' => [
       'term' => $term,
       'vocabulary' => $vocabulary,
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -94,7 +94,7 @@ function taxonomy_token_info() {
 function taxonomy_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
   $token_service = \Drupal::token();
 
-  $replacements = array();
+  $replacements = [];
   $taxonomy_storage = \Drupal::entityManager()->getStorage('taxonomy_term');
   if ($type == 'term' && !empty($data['term'])) {
     $term = $data['term'];
@@ -116,7 +116,7 @@ function taxonomy_tokens($type, $tokens, array $data, array $options, Bubbleable
           break;
 
         case 'url':
-          $replacements[$original] = $term->url('canonical', array('absolute' => TRUE));
+          $replacements[$original] = $term->url('canonical', ['absolute' => TRUE]);
           break;
 
         case 'node-count':
@@ -145,12 +145,12 @@ function taxonomy_tokens($type, $tokens, array $data, array $options, Bubbleable
 
     if ($vocabulary_tokens = $token_service->findWithPrefix($tokens, 'vocabulary')) {
       $vocabulary = Vocabulary::load($term->bundle());
-      $replacements += $token_service->generate('vocabulary', $vocabulary_tokens, array('vocabulary' => $vocabulary), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('vocabulary', $vocabulary_tokens, ['vocabulary' => $vocabulary], $options, $bubbleable_metadata);
     }
 
     if (($vocabulary_tokens = $token_service->findWithPrefix($tokens, 'parent')) && $parents = $taxonomy_storage->loadParents($term->id())) {
       $parent = array_pop($parents);
-      $replacements += $token_service->generate('term', $vocabulary_tokens, array('term' => $parent), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('term', $vocabulary_tokens, ['term' => $parent], $options, $bubbleable_metadata);
     }
   }
 
diff --git a/core/modules/taxonomy/taxonomy.views.inc b/core/modules/taxonomy/taxonomy.views.inc
index 5360d508147d6c01515a6ee5c54f811bf13308e1..1eedbbe7bf09e4a82366607ef901c3c5f9733505 100644
--- a/core/modules/taxonomy/taxonomy.views.inc
+++ b/core/modules/taxonomy/taxonomy.views.inc
@@ -11,44 +11,44 @@
  * Implements hook_views_data_alter().
  */
 function taxonomy_views_data_alter(&$data) {
-  $data['node_field_data']['term_node_tid'] = array(
+  $data['node_field_data']['term_node_tid'] = [
     'title' => t('Taxonomy terms on node'),
     'help' => t('Relate nodes to taxonomy terms, specifying which vocabulary or vocabularies to use. This relationship will cause duplicated records if there are multiple terms.'),
-    'relationship' => array(
+    'relationship' => [
       'id' => 'node_term_data',
       'label' => t('term'),
       'base' => 'taxonomy_term_field_data',
-    ),
-    'field' => array(
+    ],
+    'field' => [
       'title' => t('All taxonomy terms'),
       'help' => t('Display all taxonomy terms associated with a node from specified vocabularies.'),
       'id' => 'taxonomy_index_tid',
       'no group by' => TRUE,
       'click sortable' => FALSE,
-    ),
-  );
+    ],
+  ];
 
-  $data['node_field_data']['term_node_tid_depth'] = array(
+  $data['node_field_data']['term_node_tid_depth'] = [
     'help' => t('Display content if it has the selected taxonomy terms, or children of the selected terms. Due to additional complexity, this has fewer options than the versions without depth.'),
     'real field' => 'nid',
-    'argument' => array(
+    'argument' => [
       'title' => t('Has taxonomy term ID (with depth)'),
       'id' => 'taxonomy_index_tid_depth',
       'accept depth modifier' => TRUE,
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'title' => t('Has taxonomy terms (with depth)'),
       'id' => 'taxonomy_index_tid_depth',
-    ),
-  );
+    ],
+  ];
 
-  $data['node_field_data']['term_node_tid_depth_modifier'] = array(
+  $data['node_field_data']['term_node_tid_depth_modifier'] = [
     'title' => t('Has taxonomy term ID depth modifier'),
     'help' => t('Allows the "depth" for Taxonomy: Term ID (with depth) to be modified via an additional contextual filter value.'),
-    'argument' => array(
+    'argument' => [
       'id' => 'taxonomy_index_tid_depth_modifier',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
diff --git a/core/modules/taxonomy/tests/src/Functional/EfqTest.php b/core/modules/taxonomy/tests/src/Functional/EfqTest.php
index 1f788c82eeff3998a9b1fb860c2bab2ab06892c7..945c0b1085cd8955e74d7ee8d83c56ca0dcc0478 100644
--- a/core/modules/taxonomy/tests/src/Functional/EfqTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/EfqTest.php
@@ -26,7 +26,7 @@ protected function setUp() {
    * Tests that a basic taxonomy entity query works.
    */
   function testTaxonomyEfq() {
-    $terms = array();
+    $terms = [];
     for ($i = 0; $i < 5; $i++) {
       $term = $this->createTerm($this->vocabulary);
       $terms[$term->id()] = $term;
@@ -35,17 +35,17 @@ function testTaxonomyEfq() {
     sort($result);
     $this->assertEqual(array_keys($terms), $result, 'Taxonomy terms were retrieved by entity query.');
     $tid = reset($result);
-    $ids = (object) array(
+    $ids = (object) [
       'entity_type' => 'taxonomy_term',
       'entity_id' => $tid,
       'bundle' => $this->vocabulary->id(),
-    );
+    ];
     $term = _field_create_entity_from_ids($ids);
     $this->assertEqual($term->id(), $tid, 'Taxonomy term can be created based on the IDs.');
 
     // Create a second vocabulary and five more terms.
     $vocabulary2 = $this->createVocabulary();
-    $terms2 = array();
+    $terms2 = [];
     for ($i = 0; $i < 5; $i++) {
       $term = $this->createTerm($vocabulary2);
       $terms2[$term->id()] = $term;
@@ -55,13 +55,13 @@ function testTaxonomyEfq() {
       ->condition('vid', $vocabulary2->id())
       ->execute();
     sort($result);
-    $this->assertEqual(array_keys($terms2), $result, format_string('Taxonomy terms from the %name vocabulary were retrieved by entity query.', array('%name' => $vocabulary2->label())));
+    $this->assertEqual(array_keys($terms2), $result, format_string('Taxonomy terms from the %name vocabulary were retrieved by entity query.', ['%name' => $vocabulary2->label()]));
     $tid = reset($result);
-    $ids = (object) array(
+    $ids = (object) [
       'entity_type' => 'taxonomy_term',
       'entity_id' => $tid,
       'bundle' => $vocabulary2->id(),
-    );
+    ];
     $term = _field_create_entity_from_ids($ids);
     $this->assertEqual($term->id(), $tid, 'Taxonomy term can be created based on the IDs.');
   }
diff --git a/core/modules/taxonomy/tests/src/Functional/LegacyTest.php b/core/modules/taxonomy/tests/src/Functional/LegacyTest.php
index fbbe16f9ffbe86d51bda795808b6cfc0aa36a7c3..f3b0a74e090b85fbe5ad7d94f0c92f312d758562 100644
--- a/core/modules/taxonomy/tests/src/Functional/LegacyTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/LegacyTest.php
@@ -18,7 +18,7 @@ class LegacyTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'datetime');
+  public static $modules = ['node', 'datetime'];
 
   protected function setUp() {
     parent::setUp();
@@ -31,18 +31,18 @@ protected function setUp() {
     $vocabulary->save();
     $field_name = 'field_' . $vocabulary->id();
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $vocabulary->id() => $vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $field_name, 'Tags', 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => 'entity_reference_autocomplete_tags',
-      ))
+      ])
       ->save();
 
     $this->drupalLogin($this->drupalCreateUser(['administer taxonomy', 'administer nodes', 'bypass node access']));
@@ -54,7 +54,7 @@ protected function setUp() {
   function testTaxonomyLegacyNode() {
     // Posts an article with a taxonomy term and a date prior to 1970.
     $date = new DrupalDateTime('1969-01-01 00:00:00');
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $edit['created[0][value][date]'] = $date->format('Y-m-d');
     $edit['created[0][value][time]'] = $date->format('H:i:s');
diff --git a/core/modules/taxonomy/tests/src/Functional/LoadMultipleTest.php b/core/modules/taxonomy/tests/src/Functional/LoadMultipleTest.php
index 495599272cd38d165f4d3ac665219a3d9646d5e9..ce41b2ffc926c9ed904835f12f3049404e873ed0 100644
--- a/core/modules/taxonomy/tests/src/Functional/LoadMultipleTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/LoadMultipleTest.php
@@ -31,9 +31,9 @@ function testTaxonomyTermMultipleLoad() {
       $this->createTerm($vocabulary);
     }
     // Load the terms from the vocabulary.
-    $terms = entity_load_multiple_by_properties('taxonomy_term', array('vid' => $vocabulary->id()));
+    $terms = entity_load_multiple_by_properties('taxonomy_term', ['vid' => $vocabulary->id()]);
     $count = count($terms);
-    $this->assertEqual($count, 5, format_string('Correct number of terms were loaded. @count terms.', array('@count' => $count)));
+    $this->assertEqual($count, 5, format_string('Correct number of terms were loaded. @count terms.', ['@count' => $count]));
 
     // Load the same terms again by tid.
     $terms2 = Term::loadMultiple(array_keys($terms));
@@ -47,13 +47,13 @@ function testTaxonomyTermMultipleLoad() {
     $this->assertFalse($deleted_term);
 
     // Load terms from the vocabulary by vid.
-    $terms3 = entity_load_multiple_by_properties('taxonomy_term', array('vid' => $vocabulary->id()));
+    $terms3 = entity_load_multiple_by_properties('taxonomy_term', ['vid' => $vocabulary->id()]);
     $this->assertEqual(count($terms3), 4, 'Correct number of terms were loaded.');
     $this->assertFalse(isset($terms3[$deleted->id()]));
 
     // Create a single term and load it by name.
     $term = $this->createTerm($vocabulary);
-    $loaded_terms = entity_load_multiple_by_properties('taxonomy_term', array('name' => $term->getName()));
+    $loaded_terms = entity_load_multiple_by_properties('taxonomy_term', ['name' => $term->getName()]);
     $this->assertEqual(count($loaded_terms), 1, 'One term was loaded.');
     $loaded_term = reset($loaded_terms);
     $this->assertEqual($term->id(), $loaded_term->id(), 'Term loaded by name successfully.');
diff --git a/core/modules/taxonomy/tests/src/Functional/TaxonomyTestBase.php b/core/modules/taxonomy/tests/src/Functional/TaxonomyTestBase.php
index 2625af076f7d6226d511d0aca048d94a2ba9f516..ed8b95f60624c5f2360931955dd253ea1e86b109 100644
--- a/core/modules/taxonomy/tests/src/Functional/TaxonomyTestBase.php
+++ b/core/modules/taxonomy/tests/src/Functional/TaxonomyTestBase.php
@@ -19,7 +19,7 @@ abstract class TaxonomyTestBase extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'block');
+  public static $modules = ['taxonomy', 'block'];
 
   /**
    * {@inheritdoc}
@@ -30,7 +30,7 @@ protected function setUp() {
 
     // Create Basic page and Article node types.
     if ($this->profile != 'standard') {
-      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+      $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     }
   }
 
diff --git a/core/modules/taxonomy/tests/src/Functional/TermCacheTagsTest.php b/core/modules/taxonomy/tests/src/Functional/TermCacheTagsTest.php
index 10f24e8da0d4d74b3b914769a9c8069a0e9be556..35b7d6bd6e205599b036b876cc1afa714183c589 100644
--- a/core/modules/taxonomy/tests/src/Functional/TermCacheTagsTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/TermCacheTagsTest.php
@@ -16,7 +16,7 @@ class TermCacheTagsTest extends EntityWithUriCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/taxonomy/tests/src/Functional/TermEntityReferenceTest.php b/core/modules/taxonomy/tests/src/Functional/TermEntityReferenceTest.php
index 9cdafa368c8d940c3f7c96893cc448e43a4799db..2deeb417860d2374206b63a617f6cfa750f770e4 100644
--- a/core/modules/taxonomy/tests/src/Functional/TermEntityReferenceTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/TermEntityReferenceTest.php
@@ -37,41 +37,41 @@ function testSelectionTestVocabularyRestriction() {
 
     // Create an entity reference field.
     $field_name = 'taxonomy_' . $vocabulary->id();
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'translatable' => FALSE,
-      'settings' => array(
+      'settings' => [
         'target_type' => 'taxonomy_term',
-      ),
+      ],
       'type' => 'entity_reference',
       'cardinality' => 1,
-    ));
+    ]);
     $field_storage->save();
-    $field = FieldConfig::create(array(
+    $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'entity_type' => 'entity_test',
       'bundle' => 'test_bundle',
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
-        'handler_settings' => array(
+        'handler_settings' => [
           // Restrict selection of terms to a single vocabulary.
-          'target_bundles' => array(
+          'target_bundles' => [
             $vocabulary->id() => $vocabulary->id(),
-          ),
-        ),
-      ),
-    ));
+          ],
+        ],
+      ],
+    ]);
     $field->save();
 
     $handler = $this->container->get('plugin.manager.entity_reference_selection')->getSelectionHandler($field);
     $result = $handler->getReferenceableEntities();
 
-    $expected_result = array(
-      $vocabulary->id() => array(
+    $expected_result = [
+      $vocabulary->id() => [
         $term->id() => $term->getName(),
-      ),
-    );
+      ],
+    ];
 
     $this->assertIdentical($result, $expected_result, 'Terms selection restricted to a single vocabulary.');
   }
diff --git a/core/modules/taxonomy/tests/src/Functional/TermIndexTest.php b/core/modules/taxonomy/tests/src/Functional/TermIndexTest.php
index 75169392bb9d6836466498892e55bacbc8f1eea5..5266b8ff55e45b447146afd95761d1ab3f34684f 100644
--- a/core/modules/taxonomy/tests/src/Functional/TermIndexTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/TermIndexTest.php
@@ -17,7 +17,7 @@ class TermIndexTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('views');
+  public static $modules = ['views'];
 
   /**
    * Vocabulary for testing.
@@ -50,37 +50,37 @@ protected function setUp() {
     $this->vocabulary = $this->createVocabulary();
 
     $this->fieldName1 = Unicode::strtolower($this->randomMachineName());
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-       ),
+       ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $this->fieldName1, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($this->fieldName1, array(
+      ->setComponent($this->fieldName1, [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
     entity_get_display('node', 'article', 'default')
-      ->setComponent($this->fieldName1, array(
+      ->setComponent($this->fieldName1, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
 
     $this->fieldName2 = Unicode::strtolower($this->randomMachineName());
     $this->createEntityReferenceField('node', 'article', $this->fieldName2, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($this->fieldName2, array(
+      ->setComponent($this->fieldName2, [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
     entity_get_display('node', 'article', 'default')
-      ->setComponent($this->fieldName2, array(
+      ->setComponent($this->fieldName2, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
   }
 
@@ -94,7 +94,7 @@ function testTaxonomyIndex() {
     $term_2 = $this->createTerm($this->vocabulary);
 
     // Post an article.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $this->randomMachineName();
     $edit['body[0][value]'] = $this->randomMachineName();
     $edit["{$this->fieldName1}[]"] = $term_1->id();
@@ -103,10 +103,10 @@ function testTaxonomyIndex() {
 
     // Check that the term is indexed, and only once.
     $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_1->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(1, $index_count, 'Term 1 is indexed once.');
 
     // Update the article to change one term.
@@ -114,15 +114,15 @@ function testTaxonomyIndex() {
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
 
     // Check that both terms are indexed.
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_1->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(1, $index_count, 'Term 1 is indexed.');
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_2->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(1, $index_count, 'Term 2 is indexed.');
 
     // Update the article to change another term.
@@ -130,19 +130,19 @@ function testTaxonomyIndex() {
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
 
     // Check that only one term is indexed.
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_1->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(0, $index_count, 'Term 1 is not indexed.');
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_2->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(1, $index_count, 'Term 2 is indexed once.');
 
     // Redo the above tests without interface.
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $node = $node_storage->load($node->id());
     $node->title = $this->randomMachineName();
 
@@ -150,47 +150,47 @@ function testTaxonomyIndex() {
     $node->save();
 
     // Check that the index was not changed.
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_1->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(0, $index_count, 'Term 1 is not indexed.');
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_2->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(1, $index_count, 'Term 2 is indexed once.');
 
     // Update the article to change one term.
-    $node->{$this->fieldName1} = array(array('target_id' => $term_1->id()));
+    $node->{$this->fieldName1} = [['target_id' => $term_1->id()]];
     $node->save();
 
     // Check that both terms are indexed.
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_1->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(1, $index_count, 'Term 1 is indexed.');
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_2->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(1, $index_count, 'Term 2 is indexed.');
 
     // Update the article to change another term.
-    $node->{$this->fieldName2} = array(array('target_id' => $term_1->id()));
+    $node->{$this->fieldName2} = [['target_id' => $term_1->id()]];
     $node->save();
 
     // Check that only one term is indexed.
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_1->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(1, $index_count, 'Term 1 is indexed once.');
-    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', array(
+    $index_count = db_query('SELECT COUNT(*) FROM {taxonomy_index} WHERE nid = :nid AND tid = :tid', [
       ':nid' => $node->id(),
       ':tid' => $term_2->id(),
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual(0, $index_count, 'Term 2 is not indexed.');
   }
 
@@ -201,7 +201,7 @@ function testTaxonomyTermHierarchyBreadcrumbs() {
     // Create two taxonomy terms and set term2 as the parent of term1.
     $term1 = $this->createTerm($this->vocabulary);
     $term2 = $this->createTerm($this->vocabulary);
-    $term1->parent = array($term2->id());
+    $term1->parent = [$term2->id()];
     $term1->save();
 
     // Verify that the page breadcrumbs include a link to the parent term.
diff --git a/core/modules/taxonomy/tests/src/Functional/TermLanguageTest.php b/core/modules/taxonomy/tests/src/Functional/TermLanguageTest.php
index 1ab8d4865be029e056e7a712897a19c785ab4c6c..ce87396fc6404ff4b6b3a3df541605449f8242bc 100644
--- a/core/modules/taxonomy/tests/src/Functional/TermLanguageTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/TermLanguageTest.php
@@ -12,7 +12,7 @@
  */
 class TermLanguageTest extends TaxonomyTestBase {
 
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   /**
    * Vocabulary for testing.
@@ -31,19 +31,19 @@ protected function setUp() {
     $this->vocabulary = $this->createVocabulary();
 
     // Add some custom languages.
-    foreach (array('aa', 'bb', 'cc') as $language_code) {
-      ConfigurableLanguage::create(array(
+    foreach (['aa', 'bb', 'cc'] as $language_code) {
+      ConfigurableLanguage::create([
         'id' => $language_code,
         'label' => $this->randomMachineName(),
-      ))->save();
+      ])->save();
     }
   }
 
   function testTermLanguage() {
     // Configure the vocabulary to not hide the language selector.
-    $edit = array(
+    $edit = [
       'default_language[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id(), $edit, t('Save'));
 
     // Add a term.
@@ -51,10 +51,10 @@ function testTermLanguage() {
     // Check that we have the language selector.
     $this->assertField('edit-langcode-0-value', t('The language selector field was found on the page.'));
     // Submit the term.
-    $edit = array(
+    $edit = [
       'name[0][value]' => $this->randomMachineName(),
       'langcode[0][value]' => 'aa',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $terms = taxonomy_term_load_multiple_by_name($edit['name[0][value]']);
     $term = reset($terms);
@@ -76,19 +76,19 @@ function testTermLanguage() {
   function testDefaultTermLanguage() {
     // Configure the vocabulary to not hide the language selector, and make the
     // default language of the terms fixed.
-    $edit = array(
+    $edit = [
       'default_language[langcode]' => 'bb',
       'default_language[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id(), $edit, t('Save'));
     $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add');
     $this->assertOptionSelected('edit-langcode-0-value', 'bb', 'The expected langcode was selected.');
 
     // Make the default language of the terms to be the current interface.
-    $edit = array(
+    $edit = [
       'default_language[langcode]' => 'current_interface',
       'default_language[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id(), $edit, t('Save'));
     $this->drupalGet('aa/admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add');
     $this->assertOptionSelected('edit-langcode-0-value', 'aa', "The expected langcode, 'aa', was selected.");
@@ -98,10 +98,10 @@ function testDefaultTermLanguage() {
     // Change the default language of the site and check if the default terms
     // language is still correctly selected.
     $this->config('system.site')->set('default_langcode', 'cc')->save();
-    $edit = array(
+    $edit = [
       'default_language[langcode]' => LanguageInterface::LANGCODE_SITE_DEFAULT,
       'default_language[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id(), $edit, t('Save'));
     $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add');
     $this->assertOptionSelected('edit-langcode-0-value', 'cc', "The expected langcode, 'cc', was selected.");
diff --git a/core/modules/taxonomy/tests/src/Functional/TermTranslationFieldViewTest.php b/core/modules/taxonomy/tests/src/Functional/TermTranslationFieldViewTest.php
index 9588e4d0a8fc7076489de32989c8457de0a904ef..c5df74dadea2d8362829ab76a611c7136ea2b05e 100644
--- a/core/modules/taxonomy/tests/src/Functional/TermTranslationFieldViewTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/TermTranslationFieldViewTest.php
@@ -40,7 +40,7 @@ class TermTranslationFieldViewTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'taxonomy');
+  public static $modules = ['language', 'content_translation', 'taxonomy'];
 
   protected function setUp() {
     parent::setUp();
@@ -79,7 +79,7 @@ protected function setUpNode() {
         'value' => $this->randomMachineName(),
         'format' => 'basic_html'
       ]],
-      $this->termFieldName => array(array('target_id' => $this->term->id())),
+      $this->termFieldName => [['target_id' => $this->term->id()]],
       'langcode' => $this->baseLangcode,
     ]);
     $node->save();
@@ -92,14 +92,14 @@ protected function setUpNode() {
    * Creates a test subject term, with translation.
    */
   protected function setUpTerm() {
-    $this->term = $this->createTerm($this->vocabulary, array(
+    $this->term = $this->createTerm($this->vocabulary, [
       'name' => $this->baseTagName,
       'langcode' => $this->baseLangcode,
-    ));
+    ]);
 
-    $this->term->addTranslation($this->translateToLangcode, array(
+    $this->term->addTranslation($this->translateToLangcode, [
       'name' => $this->translatedTagName,
-    ));
+    ]);
     $this->term->save();
   }
 
diff --git a/core/modules/taxonomy/tests/src/Functional/TokenReplaceTest.php b/core/modules/taxonomy/tests/src/Functional/TokenReplaceTest.php
index 1c8b7ea53682274926bb14bc7ea45ac2aeb0006d..e6836f68049b99c6a4d9bdb6148bc2d1f0b3235c 100644
--- a/core/modules/taxonomy/tests/src/Functional/TokenReplaceTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/TokenReplaceTest.php
@@ -33,23 +33,23 @@ protected function setUp() {
     $this->vocabulary = $this->createVocabulary();
     $this->fieldName = 'taxonomy_' . $this->vocabulary->id();
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'article', $this->fieldName, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'options_select',
-      ))
+      ])
       ->save();
     entity_get_display('node', 'article', 'default')
-      ->setComponent($this->fieldName, array(
+      ->setComponent($this->fieldName, [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
   }
 
@@ -65,23 +65,23 @@ function testTaxonomyTokenReplacement() {
     $term2 = $this->createTerm($this->vocabulary);
 
     // Edit $term2, setting $term1 as parent.
-    $edit = array();
+    $edit = [];
     $edit['name[0][value]'] = '<blink>Blinking Text</blink>';
-    $edit['parent[]'] = array($term1->id());
+    $edit['parent[]'] = [$term1->id()];
     $this->drupalPostForm('taxonomy/term/' . $term2->id() . '/edit', $edit, t('Save'));
 
     // Create node with term2.
-    $edit = array();
-    $node = $this->drupalCreateNode(array('type' => 'article'));
+    $edit = [];
+    $node = $this->drupalCreateNode(['type' => 'article']);
     $edit[$this->fieldName . '[]'] = $term2->id();
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
 
     // Generate and test sanitized tokens for term1.
-    $tests = array();
+    $tests = [];
     $tests['[term:tid]'] = $term1->id();
     $tests['[term:name]'] = $term1->getName();
     $tests['[term:description]'] = $term1->description->processed;
-    $tests['[term:url]'] = $term1->url('canonical', array('absolute' => TRUE));
+    $tests['[term:url]'] = $term1->url('canonical', ['absolute' => TRUE]);
     $tests['[term:node-count]'] = 0;
     $tests['[term:parent:name]'] = '[term:parent:name]';
     $tests['[term:vocabulary:name]'] = $this->vocabulary->label();
@@ -89,7 +89,7 @@ function testTaxonomyTokenReplacement() {
 
     $base_bubbleable_metadata = BubbleableMetadata::createFromObject($term1);
 
-    $metadata_tests = array();
+    $metadata_tests = [];
     $metadata_tests['[term:tid]'] = $base_bubbleable_metadata;
     $metadata_tests['[term:name]'] = $base_bubbleable_metadata;
     $metadata_tests['[term:description]'] = $base_bubbleable_metadata;
@@ -102,20 +102,20 @@ function testTaxonomyTokenReplacement() {
 
     foreach ($tests as $input => $expected) {
       $bubbleable_metadata = new BubbleableMetadata();
-      $output = $token_service->replace($input, array('term' => $term1), array('langcode' => $language_interface->getId()), $bubbleable_metadata);
-      $this->assertEqual($output, $expected, format_string('Sanitized taxonomy term token %token replaced.', array('%token' => $input)));
+      $output = $token_service->replace($input, ['term' => $term1], ['langcode' => $language_interface->getId()], $bubbleable_metadata);
+      $this->assertEqual($output, $expected, format_string('Sanitized taxonomy term token %token replaced.', ['%token' => $input]));
       $this->assertEqual($bubbleable_metadata, $metadata_tests[$input]);
     }
 
     // Generate and test sanitized tokens for term2.
-    $tests = array();
+    $tests = [];
     $tests['[term:tid]'] = $term2->id();
     $tests['[term:name]'] = $term2->getName();
     $tests['[term:description]'] = $term2->description->processed;
-    $tests['[term:url]'] = $term2->url('canonical', array('absolute' => TRUE));
+    $tests['[term:url]'] = $term2->url('canonical', ['absolute' => TRUE]);
     $tests['[term:node-count]'] = 1;
     $tests['[term:parent:name]'] = $term1->getName();
-    $tests['[term:parent:url]'] = $term1->url('canonical', array('absolute' => TRUE));
+    $tests['[term:parent:url]'] = $term1->url('canonical', ['absolute' => TRUE]);
     $tests['[term:parent:parent:name]'] = '[term:parent:parent:name]';
     $tests['[term:vocabulary:name]'] = $this->vocabulary->label();
 
@@ -123,12 +123,12 @@ function testTaxonomyTokenReplacement() {
     $this->assertFalse(in_array(0, array_map('strlen', $tests)), 'No empty tokens generated.');
 
     foreach ($tests as $input => $expected) {
-      $output = $token_service->replace($input, array('term' => $term2), array('langcode' => $language_interface->getId()));
-      $this->assertEqual($output, $expected, format_string('Sanitized taxonomy term token %token replaced.', array('%token' => $input)));
+      $output = $token_service->replace($input, ['term' => $term2], ['langcode' => $language_interface->getId()]);
+      $this->assertEqual($output, $expected, format_string('Sanitized taxonomy term token %token replaced.', ['%token' => $input]));
     }
 
     // Generate and test sanitized tokens.
-    $tests = array();
+    $tests = [];
     $tests['[vocabulary:vid]'] = $this->vocabulary->id();
     $tests['[vocabulary:name]'] = $this->vocabulary->label();
     $tests['[vocabulary:description]'] = $this->vocabulary->getDescription();
@@ -139,8 +139,8 @@ function testTaxonomyTokenReplacement() {
     $this->assertFalse(in_array(0, array_map('strlen', $tests)), 'No empty tokens generated.');
 
     foreach ($tests as $input => $expected) {
-      $output = $token_service->replace($input, array('vocabulary' => $this->vocabulary), array('langcode' => $language_interface->getId()));
-      $this->assertEqual($output, $expected, format_string('Sanitized taxonomy vocabulary token %token replaced.', array('%token' => $input)));
+      $output = $token_service->replace($input, ['vocabulary' => $this->vocabulary], ['langcode' => $language_interface->getId()]);
+      $this->assertEqual($output, $expected, format_string('Sanitized taxonomy vocabulary token %token replaced.', ['%token' => $input]));
     }
   }
 
diff --git a/core/modules/taxonomy/tests/src/Functional/VocabularyCrudTest.php b/core/modules/taxonomy/tests/src/Functional/VocabularyCrudTest.php
index 2705ab0f097876cdb8e29d00ed04ffdb5259a94a..d32fb0fd0539ade41fd0f71831cb07faa73c36c6 100644
--- a/core/modules/taxonomy/tests/src/Functional/VocabularyCrudTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/VocabularyCrudTest.php
@@ -19,12 +19,12 @@ class VocabularyCrudTest extends TaxonomyTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test', 'taxonomy_crud');
+  public static $modules = ['field_test', 'taxonomy_crud'];
 
   protected function setUp() {
     parent::setUp();
 
-    $admin_user = $this->drupalCreateUser(array('create article content', 'administer taxonomy'));
+    $admin_user = $this->drupalCreateUser(['create article content', 'administer taxonomy']);
     $this->drupalLogin($admin_user);
     $this->vocabulary = $this->createVocabulary();
   }
@@ -42,15 +42,15 @@ function testTaxonomyVocabularyDeleteWithTerms() {
     // Assert that there are no terms left.
     $this->assertEqual(0, $query->execute(), 'There are no terms remaining.');
 
-    $terms = array();
+    $terms = [];
     for ($i = 0; $i < 5; $i++) {
       $terms[$i] = $this->createTerm($vocabulary);
     }
 
     // Set up hierarchy. term 2 is a child of 1 and 4 a child of 1 and 2.
-    $terms[2]->parent = array($terms[1]->id());
+    $terms[2]->parent = [$terms[1]->id()];
     $terms[2]->save();
-    $terms[4]->parent = array($terms[1]->id(), $terms[2]->id());
+    $terms[4]->parent = [$terms[1]->id(), $terms[2]->id()];
     $terms[4]->save();
 
     // Assert that there are now 5 terms.
@@ -119,22 +119,22 @@ function testTaxonomyVocabularyLoadMultiple() {
 
     // Fetch the vocabularies with entity_load_multiple(), specifying IDs.
     // Ensure they are returned in the same order as the original array.
-    $vocabularies = Vocabulary::loadMultiple(array($vocabulary3->id(), $vocabulary2->id(), $vocabulary1->id()));
+    $vocabularies = Vocabulary::loadMultiple([$vocabulary3->id(), $vocabulary2->id(), $vocabulary1->id()]);
     $loaded_order = array_keys($vocabularies);
-    $expected_order = array($vocabulary3->id(), $vocabulary2->id(), $vocabulary1->id());
+    $expected_order = [$vocabulary3->id(), $vocabulary2->id(), $vocabulary1->id()];
     $this->assertIdentical($loaded_order, $expected_order);
 
     // Test loading vocabularies by their properties.
     $controller = $this->container->get('entity.manager')->getStorage('taxonomy_vocabulary');
     // Fetch vocabulary 1 by name.
-    $vocabulary = current($controller->loadByProperties(array('name' => $vocabulary1->label())));
+    $vocabulary = current($controller->loadByProperties(['name' => $vocabulary1->label()]));
     $this->assertEqual($vocabulary->id(), $vocabulary1->id(), 'Vocabulary loaded successfully by name.');
 
     // Fetch vocabulary 2 by name and ID.
-    $vocabulary = current($controller->loadByProperties(array(
+    $vocabulary = current($controller->loadByProperties([
       'name' => $vocabulary2->label(),
       'vid' => $vocabulary2->id(),
-    )));
+    ]));
     $this->assertEqual($vocabulary->id(), $vocabulary2->id(), 'Vocabulary loaded successfully by name and ID.');
   }
 
@@ -145,19 +145,19 @@ function testUninstallReinstall() {
     // Field storages and fields attached to taxonomy term bundles should be
     // removed when the module is uninstalled.
     $field_name = Unicode::strtolower($this->randomMachineName() . '_field_name');
-    $storage_definition = array(
+    $storage_definition = [
       'field_name' => $field_name,
       'entity_type' => 'taxonomy_term',
       'type' => 'text',
       'cardinality' => 4
-    );
+    ];
     FieldStorageConfig::create($storage_definition)->save();
-    $field_definition = array(
+    $field_definition = [
       'field_name' => $field_name,
       'entity_type' => 'taxonomy_term',
       'bundle' => $this->vocabulary->id(),
       'label' => $this->randomMachineName() . '_label',
-    );
+    ];
     FieldConfig::create($field_definition)->save();
 
     // Remove the third party setting from the memory copy of the vocabulary.
@@ -166,8 +166,8 @@ function testUninstallReinstall() {
     $this->vocabulary->unsetThirdPartySetting('taxonomy_crud', 'foo');
 
     require_once \Drupal::root() . '/core/includes/install.inc';
-    $this->container->get('module_installer')->uninstall(array('taxonomy'));
-    $this->container->get('module_installer')->install(array('taxonomy'));
+    $this->container->get('module_installer')->uninstall(['taxonomy']);
+    $this->container->get('module_installer')->install(['taxonomy']);
 
     // Now create a vocabulary with the same name. All fields
     // connected to this vocabulary name should have been removed when the
diff --git a/core/modules/taxonomy/tests/src/Functional/VocabularyLanguageTest.php b/core/modules/taxonomy/tests/src/Functional/VocabularyLanguageTest.php
index da78589f29a542c73f615db70a8191e34539093e..5b9cbfe8f627a58beb455bfad129091eb813f81c 100644
--- a/core/modules/taxonomy/tests/src/Functional/VocabularyLanguageTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/VocabularyLanguageTest.php
@@ -13,7 +13,7 @@
  */
 class VocabularyLanguageTest extends TaxonomyTestBase {
 
-  public static $modules = array('language');
+  public static $modules = ['language'];
 
   protected function setUp() {
     parent::setUp();
@@ -22,15 +22,15 @@ protected function setUp() {
     $this->drupalLogin($this->drupalCreateUser(['administer taxonomy']));
 
     // Add some custom languages.
-    ConfigurableLanguage::create(array(
+    ConfigurableLanguage::create([
       'id' => 'aa',
       'label' => $this->randomMachineName(),
-    ))->save();
+    ])->save();
 
-    ConfigurableLanguage::create(array(
+    ConfigurableLanguage::create([
       'id' => 'bb',
       'label' => $this->randomMachineName(),
-    ))->save();
+    ])->save();
   }
 
   /**
@@ -70,12 +70,12 @@ function testVocabularyLanguage() {
   function testVocabularyDefaultLanguageForTerms() {
     // Add a new vocabulary and check that the default language settings are for
     // the terms are saved.
-    $edit = array(
+    $edit = [
       'name' => $this->randomMachineName(),
       'vid' => Unicode::strtolower($this->randomMachineName()),
       'default_language[langcode]' => 'bb',
       'default_language[language_alterable]' => TRUE,
-    );
+    ];
     $vid = $edit['vid'];
     $this->drupalPostForm('admin/structure/taxonomy/add', $edit, t('Save'));
 
@@ -93,10 +93,10 @@ function testVocabularyDefaultLanguageForTerms() {
     $this->assertFieldChecked('edit-default-language-language-alterable', 'Show language selection option is checked.');
 
     // Edit the vocabulary and check that the new settings are updated.
-    $edit = array(
+    $edit = [
       'default_language[langcode]' => 'aa',
       'default_language[language_alterable]' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $vid, $edit, t('Save'));
 
     // And check again the settings and also the interface.
@@ -109,11 +109,11 @@ function testVocabularyDefaultLanguageForTerms() {
     $this->assertNoFieldChecked('edit-default-language-language-alterable', 'Show language selection option is not checked.');
 
     // Check that language settings are changed after editing vocabulary.
-    $edit = array(
+    $edit = [
       'name' => $this->randomMachineName(),
       'default_language[langcode]' => 'authors_default',
       'default_language[language_alterable]' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $vid, $edit, t('Save'));
 
     // Check that we have the new settings.
diff --git a/core/modules/taxonomy/tests/src/Functional/VocabularyPermissionsTest.php b/core/modules/taxonomy/tests/src/Functional/VocabularyPermissionsTest.php
index 1b83d848ea636634174087b6bd28103d74128ddc..c5f1f94b4813d0c54bbca64330cda3e74a8cc326 100644
--- a/core/modules/taxonomy/tests/src/Functional/VocabularyPermissionsTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/VocabularyPermissionsTest.php
@@ -23,7 +23,7 @@ function testVocabularyPermissionsTaxonomyTerm() {
     $vocabulary = $this->createVocabulary();
 
     // Test as admin user.
-    $user = $this->drupalCreateUser(array('administer taxonomy'));
+    $user = $this->drupalCreateUser(['administer taxonomy']);
     $this->drupalLogin($user);
 
     // Visit the main taxonomy administration page.
@@ -32,14 +32,14 @@ function testVocabularyPermissionsTaxonomyTerm() {
     $this->assertField('edit-name-0-value', 'Add taxonomy term form opened successfully.');
 
     // Submit the term.
-    $edit = array();
+    $edit = [];
     $edit['name[0][value]'] = $this->randomMachineName();
 
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('Created new term @name.', array('@name' => $edit['name[0][value]'])), 'Term created successfully.');
+    $this->assertText(t('Created new term @name.', ['@name' => $edit['name[0][value]']]), 'Term created successfully.');
 
     // Verify that the creation message contains a link to a term.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'term/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'term/']);
     $this->assert(isset($view_link), 'The message area contains a link to a term');
 
     $terms = taxonomy_term_load_multiple_by_name($edit['name[0][value]']);
@@ -52,18 +52,18 @@ function testVocabularyPermissionsTaxonomyTerm() {
 
     $edit['name[0][value]'] = $this->randomMachineName();
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('Updated term @name.', array('@name' => $edit['name[0][value]'])), 'Term updated successfully.');
+    $this->assertText(t('Updated term @name.', ['@name' => $edit['name[0][value]']]), 'Term updated successfully.');
 
     // Delete the vocabulary.
     $this->drupalGet('taxonomy/term/' . $term->id() . '/delete');
-    $this->assertRaw(t('Are you sure you want to delete the @entity-type %label?', array('@entity-type' => 'taxonomy term', '%label' => $edit['name[0][value]'])), 'Delete taxonomy term form opened successfully.');
+    $this->assertRaw(t('Are you sure you want to delete the @entity-type %label?', ['@entity-type' => 'taxonomy term', '%label' => $edit['name[0][value]']]), 'Delete taxonomy term form opened successfully.');
 
     // Confirm deletion.
     $this->drupalPostForm(NULL, NULL, t('Delete'));
-    $this->assertRaw(t('Deleted term %name.', array('%name' => $edit['name[0][value]'])), 'Term deleted.');
+    $this->assertRaw(t('Deleted term %name.', ['%name' => $edit['name[0][value]']]), 'Term deleted.');
 
     // Test as user with "edit" permissions.
-    $user = $this->drupalCreateUser(array("edit terms in {$vocabulary->id()}"));
+    $user = $this->drupalCreateUser(["edit terms in {$vocabulary->id()}"]);
     $this->drupalLogin($user);
 
     // Visit the main taxonomy administration page.
@@ -80,10 +80,10 @@ function testVocabularyPermissionsTaxonomyTerm() {
 
     $edit['name[0][value]'] = $this->randomMachineName();
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('Updated term @name.', array('@name' => $edit['name[0][value]'])), 'Term updated successfully.');
+    $this->assertText(t('Updated term @name.', ['@name' => $edit['name[0][value]']]), 'Term updated successfully.');
 
     // Verify that the update message contains a link to a term.
-    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', array(':href' => 'term/'));
+    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'term/']);
     $this->assert(isset($view_link), 'The message area contains a link to a term');
 
     // Delete the vocabulary.
@@ -91,7 +91,7 @@ function testVocabularyPermissionsTaxonomyTerm() {
     $this->assertResponse(403, 'Delete taxonomy term form open failed.');
 
     // Test as user with "delete" permissions.
-    $user = $this->drupalCreateUser(array("delete terms in {$vocabulary->id()}"));
+    $user = $this->drupalCreateUser(["delete terms in {$vocabulary->id()}"]);
     $this->drupalLogin($user);
 
     // Visit the main taxonomy administration page.
@@ -107,11 +107,11 @@ function testVocabularyPermissionsTaxonomyTerm() {
 
     // Delete the vocabulary.
     $this->drupalGet('taxonomy/term/' . $term->id() . '/delete');
-    $this->assertRaw(t('Are you sure you want to delete the @entity-type %label?', array('@entity-type' => 'taxonomy term', '%label' => $term->getName())), 'Delete taxonomy term form opened successfully.');
+    $this->assertRaw(t('Are you sure you want to delete the @entity-type %label?', ['@entity-type' => 'taxonomy term', '%label' => $term->getName()]), 'Delete taxonomy term form opened successfully.');
 
     // Confirm deletion.
     $this->drupalPostForm(NULL, NULL, t('Delete'));
-    $this->assertRaw(t('Deleted term %name.', array('%name' => $term->getName())), 'Term deleted.');
+    $this->assertRaw(t('Deleted term %name.', ['%name' => $term->getName()]), 'Term deleted.');
 
     // Test as user without proper permissions.
     $user = $this->drupalCreateUser();
diff --git a/core/modules/taxonomy/tests/src/Functional/VocabularyTranslationTest.php b/core/modules/taxonomy/tests/src/Functional/VocabularyTranslationTest.php
index 5c41f6cd4a7e2dd6a5f2109ff8b1356f4a1111f8..3679b79db2b4b8dfe2abb205fd03841b25d4e781 100644
--- a/core/modules/taxonomy/tests/src/Functional/VocabularyTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/VocabularyTranslationTest.php
@@ -14,7 +14,7 @@ class VocabularyTranslationTest extends TaxonomyTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('content_translation', 'language');
+  public static $modules = ['content_translation', 'language'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/MigrateTaxonomyConfigsTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/MigrateTaxonomyConfigsTest.php
index 6705fbbea6a9fb2330255d19085100ea67e9d233..92ebe5926ae09363c77eb97402d4f033ca36b88a 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/MigrateTaxonomyConfigsTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/MigrateTaxonomyConfigsTest.php
@@ -17,7 +17,7 @@ class MigrateTaxonomyConfigsTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateTaxonomyTermTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateTaxonomyTermTest.php
index b0311f3da48a2ca037c5a2d54d20d833e3ab9360..125283355ee2e0362d24b9618384521b9eed4a4c 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateTaxonomyTermTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateTaxonomyTermTest.php
@@ -15,7 +15,7 @@ class MigrateTaxonomyTermTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * {@inheritdoc}
@@ -30,44 +30,44 @@ protected function setUp() {
    * Tests the Drupal 6 taxonomy term to Drupal 8 migration.
    */
   public function testTaxonomyTerms() {
-    $expected_results = array(
-      '1' => array(
+    $expected_results = [
+      '1' => [
         'source_vid' => 1,
         'vid' => 'vocabulary_1_i_0_',
         'weight' => 0,
-        'parent' => array(0),
-      ),
-      '2' => array(
+        'parent' => [0],
+      ],
+      '2' => [
         'source_vid' => 2,
         'vid' => 'vocabulary_2_i_1_',
         'weight' => 3,
-        'parent' => array(0),
-      ),
-      '3' => array(
+        'parent' => [0],
+      ],
+      '3' => [
         'source_vid' => 2,
         'vid' => 'vocabulary_2_i_1_',
         'weight' => 4,
-        'parent' => array(2),
-      ),
-      '4' => array(
+        'parent' => [2],
+      ],
+      '4' => [
         'source_vid' => 3,
         'vid' => 'vocabulary_3_i_2_',
         'weight' => 6,
-        'parent' => array(0),
-      ),
-      '5' => array(
+        'parent' => [0],
+      ],
+      '5' => [
         'source_vid' => 3,
         'vid' => 'vocabulary_3_i_2_',
         'weight' => 7,
-        'parent' => array(4),
-      ),
-      '6' => array(
+        'parent' => [4],
+      ],
+      '6' => [
         'source_vid' => 3,
         'vid' => 'vocabulary_3_i_2_',
         'weight' => 8,
-        'parent' => array(4, 5),
-      ),
-    );
+        'parent' => [4, 5],
+      ],
+    ];
     $terms = Term::loadMultiple(array_keys($expected_results));
 
     // Find each term in the tree.
@@ -87,11 +87,11 @@ public function testTaxonomyTerms() {
       $this->assertIdentical("description of term {$tid} of vocabulary {$values['source_vid']}", $term->description->value);
       $this->assertIdentical($values['vid'], $term->vid->target_id);
       $this->assertIdentical((string) $values['weight'], $term->weight->value);
-      if ($values['parent'] === array(0)) {
+      if ($values['parent'] === [0]) {
         $this->assertNull($term->parent->target_id);
       }
       else {
-        $parents = array();
+        $parents = [];
         foreach (\Drupal::entityManager()->getStorage('taxonomy_term')->loadParents($tid) as $parent) {
           $parents[] = (int) $parent->id();
         }
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateTaxonomyVocabularyTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateTaxonomyVocabularyTest.php
index c2d4ab61a80fb69449bfd225a27440ce124a74d2..6c665980b2ee0499ce3f4cc14dbab8e94b11c5eb 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateTaxonomyVocabularyTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateTaxonomyVocabularyTest.php
@@ -15,7 +15,7 @@ class MigrateTaxonomyVocabularyTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * {@inheritdoc}
@@ -32,7 +32,7 @@ public function testTaxonomyVocabulary() {
     for ($i = 0; $i < 3; $i++) {
       $j = $i + 1;
       $vocabulary = Vocabulary::load("vocabulary_{$j}_i_{$i}_");
-      $this->assertIdentical($this->getMigration('d6_taxonomy_vocabulary')->getIdMap()->lookupDestinationID(array($j)), array($vocabulary->id()));
+      $this->assertIdentical($this->getMigration('d6_taxonomy_vocabulary')->getIdMap()->lookupDestinationID([$j]), [$vocabulary->id()]);
       $this->assertIdentical("vocabulary $j (i=$i)", $vocabulary->label());
       $this->assertIdentical("description of vocabulary $j (i=$i)", $vocabulary->getDescription());
       $this->assertIdentical($i, $vocabulary->getHierarchy());
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyEntityDisplayTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyEntityDisplayTest.php
index 42f864e48e17cc40e872c535323ac30fc7b0859d..40f094e6c36e21ba269a95d56c45bde617942222 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyEntityDisplayTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyEntityDisplayTest.php
@@ -34,7 +34,7 @@ public function testVocabularyEntityDisplay() {
     $this->assertIdentical('entity_reference_label', $component['type']);
     $this->assertIdentical(20, $component['weight']);
     // Test the Id map.
-    $this->assertIdentical(array('node', 'article', 'default', 'tags'), $this->getMigration('d6_vocabulary_entity_display')->getIdMap()->lookupDestinationID(array(4, 'article')));
+    $this->assertIdentical(['node', 'article', 'default', 'tags'], $this->getMigration('d6_vocabulary_entity_display')->getIdMap()->lookupDestinationID([4, 'article']));
   }
 
 }
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyEntityFormDisplayTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyEntityFormDisplayTest.php
index a2e26c71caa4c0286b7b4c404318814cb9b7df9a..32370f25ab4ef0132c443f1b3e89d032ddaf6323 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyEntityFormDisplayTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyEntityFormDisplayTest.php
@@ -34,7 +34,7 @@ public function testVocabularyEntityFormDisplay() {
     $this->assertIdentical('options_select', $component['type']);
     $this->assertIdentical(20, $component['weight']);
     // Test the Id map.
-    $this->assertIdentical(array('node', 'article', 'default', 'tags'), $this->getMigration('d6_vocabulary_entity_form_display')->getIdMap()->lookupDestinationID(array(4, 'article')));
+    $this->assertIdentical(['node', 'article', 'default', 'tags'], $this->getMigration('d6_vocabulary_entity_form_display')->getIdMap()->lookupDestinationID([4, 'article']));
 
     // Test the term widget tags setting.
     $entity_form_display = EntityFormDisplay::load('node.story.default');
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyFieldInstanceTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyFieldInstanceTest.php
index 2534c3e30f57524f74f987202871cc7695006abd..45db4a817598e1384ed2c66ef169fdfb7f4d4545 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyFieldInstanceTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyFieldInstanceTest.php
@@ -48,7 +48,7 @@ public function testVocabularyFieldInstance() {
     $this->assertIdentical(['tags'], $settings['handler_settings']['target_bundles'], 'The target_bundles handler setting is correct.');
     $this->assertIdentical(TRUE, $settings['handler_settings']['auto_create'], 'The "auto_create" setting is correct.');
 
-    $this->assertIdentical(array('node', 'article', 'tags'), $this->getMigration('d6_vocabulary_field_instance')->getIdMap()->lookupDestinationID(array(4, 'article')));
+    $this->assertIdentical(['node', 'article', 'tags'], $this->getMigration('d6_vocabulary_field_instance')->getIdMap()->lookupDestinationID([4, 'article']));
 
     // Test the the field vocabulary_1_i_0_
     $field_id = 'node.story.vocabulary_1_i_0_';
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyFieldTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyFieldTest.php
index eb0c480401b6e053cd7593792d3b1849bbb65002..6c3631bfebda0288d6da24254f41299837ca6a35 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyFieldTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateVocabularyFieldTest.php
@@ -39,7 +39,7 @@ public function testVocabularyField() {
     $this->assertIdentical('taxonomy_term', $settings['target_type'], "Target type is correct.");
     $this->assertIdentical(1, $field_storage->getCardinality(), "Field cardinality in 1.");
 
-    $this->assertIdentical(array('node', 'tags'), $this->getMigration('d6_vocabulary_field')->getIdMap()->lookupDestinationID(array(4)), "Test IdMap");
+    $this->assertIdentical(['node', 'tags'], $this->getMigration('d6_vocabulary_field')->getIdMap()->lookupDestinationID([4]), "Test IdMap");
   }
 
 }
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateNodeTaxonomyTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateNodeTaxonomyTest.php
index d57e3341b141b809b137bbf4fcb1b81f74f854fc..0d985e24299a326f89aa0bab3e3b3b22607818b1 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateNodeTaxonomyTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateNodeTaxonomyTest.php
@@ -14,7 +14,7 @@
  */
 class MigrateNodeTaxonomyTest extends MigrateDrupal7TestBase {
 
-  public static $modules = array(
+  public static $modules = [
     'datetime',
     'field',
     'filter',
@@ -24,7 +24,7 @@ class MigrateNodeTaxonomyTest extends MigrateDrupal7TestBase {
     'taxonomy',
     'telephone',
     'text',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -40,21 +40,21 @@ protected function setUp() {
 
     $this->executeMigration('d7_node_type');
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'type' => 'entity_reference',
       'field_name' => 'field_tags',
       'entity_type' => 'node',
-      'settings' => array(
+      'settings' => [
         'target_type' => 'taxonomy_term',
-      ),
+      ],
       'cardinality' => FieldStorageConfigInterface::CARDINALITY_UNLIMITED,
-    ))->save();
+    ])->save();
 
-    FieldConfig::create(array(
+    FieldConfig::create([
       'entity_type' => 'node',
       'field_name' => 'field_tags',
       'bundle' => 'article',
-    ))->save();
+    ])->save();
 
     $this->executeMigrations([
       'd7_taxonomy_vocabulary',
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateTaxonomyVocabularyTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateTaxonomyVocabularyTest.php
index 3f29fbf77f91c2a99f774d843a870c0977d96c15..7f2ceef8a24ac21730adc74839dd5ec8b790eb01 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateTaxonomyVocabularyTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateTaxonomyVocabularyTest.php
@@ -16,7 +16,7 @@ class MigrateTaxonomyVocabularyTest extends MigrateDrupal7TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/taxonomy/tests/src/Kernel/TermKernelTest.php b/core/modules/taxonomy/tests/src/Kernel/TermKernelTest.php
index 1e2b23230254b14f644aece4e9c2238c8eb1aef4..0d70d840dabcc216cd4cefc15373dafed8a0a2df 100644
--- a/core/modules/taxonomy/tests/src/Kernel/TermKernelTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/TermKernelTest.php
@@ -18,14 +18,14 @@ class TermKernelTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array( 'filter', 'taxonomy', 'text', 'user' );
+  public static $modules = [ 'filter', 'taxonomy', 'text', 'user' ];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('filter'));
+    $this->installConfig(['filter']);
     $this->installEntitySchema('taxonomy_term');
   }
 
@@ -38,11 +38,11 @@ public function testTermDelete() {
     $valid_term = $this->createTerm($vocabulary);
     // Delete a valid term.
     $valid_term->delete();
-    $terms = entity_load_multiple_by_properties('taxonomy_term', array('vid' => $vocabulary->id()));
+    $terms = entity_load_multiple_by_properties('taxonomy_term', ['vid' => $vocabulary->id()]);
     $this->assertTrue(empty($terms), 'Vocabulary is empty after deletion');
 
     // Delete an invalid term. Should not throw any notices.
-    entity_delete_multiple('taxonomy_term', array(42));
+    entity_delete_multiple('taxonomy_term', [42]);
   }
 
   /**
@@ -53,18 +53,18 @@ public function testMultipleParentDelete() {
     $parent_term1 = $this->createTerm($vocabulary);
     $parent_term2 = $this->createTerm($vocabulary);
     $child_term = $this->createTerm($vocabulary);
-    $child_term->parent = array($parent_term1->id(), $parent_term2->id());
+    $child_term->parent = [$parent_term1->id(), $parent_term2->id()];
     $child_term->save();
     $child_term_id = $child_term->id();
 
     $parent_term1->delete();
     $term_storage = $this->container->get('entity.manager')->getStorage('taxonomy_term');
-    $term_storage->resetCache(array($child_term_id));
+    $term_storage->resetCache([$child_term_id]);
     $child_term = Term::load($child_term_id);
     $this->assertTrue(!empty($child_term), 'Child term is not deleted if only one of its parents is removed.');
 
     $parent_term2->delete();
-    $term_storage->resetCache(array($child_term_id));
+    $term_storage->resetCache([$child_term_id]);
     $child_term = Term::load($child_term_id);
     $this->assertTrue(empty($child_term), 'Child term is deleted if all of its parents are removed.');
   }
@@ -75,7 +75,7 @@ public function testMultipleParentDelete() {
   public function testTaxonomyVocabularyTree() {
     // Create a new vocabulary with 6 terms.
     $vocabulary = $this->createVocabulary();
-    $term = array();
+    $term = [];
     for ($i = 0; $i < 6; $i++) {
       $term[$i] = $this->createTerm($vocabulary);
     }
@@ -90,13 +90,13 @@ public function testTaxonomyVocabularyTree() {
     $term[1]->save();
 
     // $term[2] is a child of 1 and 5.
-    $term[2]->parent = array($term[1]->id(), $term[5]->id());
+    $term[2]->parent = [$term[1]->id(), $term[5]->id()];
     $term[2]->save();
     // $term[3] is a child of 2.
-    $term[3]->parent = array($term[2]->id());
+    $term[3]->parent = [$term[2]->id()];
     $term[3]->save();
     // $term[5] is a child of 4.
-    $term[5]->parent = array($term[4]->id());
+    $term[5]->parent = [$term[4]->id()];
     $term[5]->save();
 
     /**
diff --git a/core/modules/taxonomy/tests/src/Kernel/TermValidationTest.php b/core/modules/taxonomy/tests/src/Kernel/TermValidationTest.php
index 3d9cfb77765dcd204ea0bebe83137ad8074b35b1..437a305f6f567a5de3f0af7c7df8226de8a5edad 100644
--- a/core/modules/taxonomy/tests/src/Kernel/TermValidationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/TermValidationTest.php
@@ -16,7 +16,7 @@ class TermValidationTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * {@inheritdoc}
@@ -30,14 +30,14 @@ protected function setUp() {
    * Tests the term validation constraints.
    */
   public function testValidation() {
-    $this->entityManager->getStorage('taxonomy_vocabulary')->create(array(
+    $this->entityManager->getStorage('taxonomy_vocabulary')->create([
       'vid' => 'tags',
       'name' => 'Tags',
-    ))->save();
-    $term = $this->entityManager->getStorage('taxonomy_term')->create(array(
+    ])->save();
+    $term = $this->entityManager->getStorage('taxonomy_term')->create([
       'name' => 'test',
       'vid' => 'tags',
-    ));
+    ]);
     $violations = $term->validate();
     $this->assertEqual(count($violations), 0, 'No violations when validating a default term.');
 
@@ -46,7 +46,7 @@ public function testValidation() {
     $this->assertEqual(count($violations), 1, 'Violation found when name is too long.');
     $this->assertEqual($violations[0]->getPropertyPath(), 'name.0.value');
     $field_label = $term->get('name')->getFieldDefinition()->getLabel();
-    $this->assertEqual($violations[0]->getMessage(), t('%name: may not be longer than @max characters.', array('%name' => $field_label, '@max' => 255)));
+    $this->assertEqual($violations[0]->getMessage(), t('%name: may not be longer than @max characters.', ['%name' => $field_label, '@max' => 255]));
 
     $term->set('name', NULL);
     $violations = $term->validate();
@@ -58,7 +58,7 @@ public function testValidation() {
     $term->set('parent', 9999);
     $violations = $term->validate();
     $this->assertEqual(count($violations), 1, 'Violation found when term parent is invalid.');
-    $this->assertEqual($violations[0]->getMessage(), format_string('The referenced entity (%type: %id) does not exist.', array('%type' => 'taxonomy_term', '%id' => 9999)));
+    $this->assertEqual($violations[0]->getMessage(), format_string('The referenced entity (%type: %id) does not exist.', ['%type' => 'taxonomy_term', '%id' => 9999]));
 
     $term->set('parent', 0);
     $violations = $term->validate();
diff --git a/core/modules/taxonomy/tests/src/Unit/Menu/TaxonomyLocalTasksTest.php b/core/modules/taxonomy/tests/src/Unit/Menu/TaxonomyLocalTasksTest.php
index dcd4967136160f8009f6afdb51219ee51f3811fc..a2df09934553d0ef3362b255ccc01a6bd6db1416 100644
--- a/core/modules/taxonomy/tests/src/Unit/Menu/TaxonomyLocalTasksTest.php
+++ b/core/modules/taxonomy/tests/src/Unit/Menu/TaxonomyLocalTasksTest.php
@@ -12,7 +12,7 @@
 class TaxonomyLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array('taxonomy' => 'core/modules/taxonomy');
+    $this->directoryList = ['taxonomy' => 'core/modules/taxonomy'];
     parent::setUp();
   }
 
@@ -21,10 +21,10 @@ protected function setUp() {
    *
    * @dataProvider getTaxonomyPageRoutes
    */
-  public function testTaxonomyPageLocalTasks($route, $subtask = array()) {
-    $tasks = array(
-      0 => array('entity.taxonomy_term.canonical', 'entity.taxonomy_term.edit_form'),
-    );
+  public function testTaxonomyPageLocalTasks($route, $subtask = []) {
+    $tasks = [
+      0 => ['entity.taxonomy_term.canonical', 'entity.taxonomy_term.edit_form'],
+    ];
     if ($subtask) $tasks[] = $subtask;
     $this->assertLocalTasks($route, $tasks);
   }
@@ -33,10 +33,10 @@ public function testTaxonomyPageLocalTasks($route, $subtask = array()) {
    * Provides a list of routes to test.
    */
   public function getTaxonomyPageRoutes() {
-    return array(
-      array('entity.taxonomy_term.canonical'),
-      array('entity.taxonomy_term.edit_form'),
-    );
+    return [
+      ['entity.taxonomy_term.canonical'],
+      ['entity.taxonomy_term.edit_form'],
+    ];
   }
 
 }
diff --git a/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php b/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
index f77b751e42c608e3d9e0e5074c8d899c0914987e..afdf54146d660629e51edff9b41f8fa5d9def47a 100644
--- a/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
+++ b/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
@@ -24,20 +24,20 @@ class TelephoneLinkFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'title' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $elements['title'] = array(
+    $elements['title'] = [
       '#type' => 'textfield',
       '#title' => t('Title to replace basic numeric telephone number display'),
       '#default_value' => $this->getSetting('title'),
-    );
+    ];
 
     return $elements;
   }
@@ -46,11 +46,11 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
     $settings = $this->getSettings();
 
     if (!empty($settings['title'])) {
-      $summary[] = t('Link using text: @title', array('@title' => $settings['title']));
+      $summary[] = t('Link using text: @title', ['@title' => $settings['title']]);
     }
     else {
       $summary[] = t('Link using provided telephone number.');
@@ -63,23 +63,23 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $element = array();
+    $element = [];
     $title_setting = $this->getSetting('title');
 
     foreach ($items as $delta => $item) {
       // Render each element as link.
-      $element[$delta] = array(
+      $element[$delta] = [
         '#type' => 'link',
         // Use custom title if available, otherwise use the telephone number
         // itself as title.
         '#title' => $title_setting ?: $item->value,
         // Prepend 'tel:' to the telephone number.
         '#url' => Url::fromUri('tel:' . rawurlencode(preg_replace('/\s+/', '', $item->value))),
-        '#options' => array('external' => TRUE),
-      );
+        '#options' => ['external' => TRUE],
+      ];
 
       if (!empty($item->_attributes)) {
-        $element[$delta]['#options'] += array('attributes' => array());
+        $element[$delta]['#options'] += ['attributes' => []];
         $element[$delta]['#options']['attributes'] += $item->_attributes;
         // Unset field item attributes since they have been included in the
         // formatter output and should not be rendered in the field template.
diff --git a/core/modules/telephone/src/Plugin/Field/FieldType/TelephoneItem.php b/core/modules/telephone/src/Plugin/Field/FieldType/TelephoneItem.php
index 20950e5ffb3329cc617aa65522db07588d0f4736..f2aa1ccddea014424ad1abaa53f422d68c3258c5 100644
--- a/core/modules/telephone/src/Plugin/Field/FieldType/TelephoneItem.php
+++ b/core/modules/telephone/src/Plugin/Field/FieldType/TelephoneItem.php
@@ -25,14 +25,14 @@ class TelephoneItem extends FieldItemBase {
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => 256,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -62,14 +62,14 @@ public function getConstraints() {
     $constraints = parent::getConstraints();
 
     $max_length = 256;
-    $constraints[] = $constraint_manager->create('ComplexData', array(
-      'value' => array(
-        'Length' => array(
+    $constraints[] = $constraint_manager->create('ComplexData', [
+      'value' => [
+        'Length' => [
           'max' => $max_length,
-          'maxMessage' => t('%name: the telephone number may not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getLabel(), '@max' => $max_length)),
-        )
-      ),
-    ));
+          'maxMessage' => t('%name: the telephone number may not be longer than @max characters.', ['%name' => $this->getFieldDefinition()->getLabel(), '@max' => $max_length]),
+        ]
+      ],
+    ]);
 
     return $constraints;
   }
diff --git a/core/modules/telephone/src/Plugin/Field/FieldWidget/TelephoneDefaultWidget.php b/core/modules/telephone/src/Plugin/Field/FieldWidget/TelephoneDefaultWidget.php
index f585067d2c6f73da2d9a25e503e9a01fa6a89ac1..1ea1837dea1d1107ef6e261a96b3ef01c1eaa5f1 100644
--- a/core/modules/telephone/src/Plugin/Field/FieldWidget/TelephoneDefaultWidget.php
+++ b/core/modules/telephone/src/Plugin/Field/FieldWidget/TelephoneDefaultWidget.php
@@ -23,21 +23,21 @@ class TelephoneDefaultWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'placeholder' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['placeholder'] = array(
+    $element['placeholder'] = [
       '#type' => 'textfield',
       '#title' => t('Placeholder'),
       '#default_value' => $this->getSetting('placeholder'),
       '#description' => t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
+    ];
     return $element;
   }
 
@@ -45,11 +45,11 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
 
     $placeholder = $this->getSetting('placeholder');
     if (!empty($placeholder)) {
-      $summary[] = t('Placeholder: @placeholder', array('@placeholder' => $placeholder));
+      $summary[] = t('Placeholder: @placeholder', ['@placeholder' => $placeholder]);
     }
     else {
       $summary[] = t('No placeholder');
@@ -62,11 +62,11 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
-    $element['value'] = $element + array(
+    $element['value'] = $element + [
       '#type' => 'tel',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : NULL,
       '#placeholder' => $this->getSetting('placeholder'),
-    );
+    ];
     return $element;
   }
 
diff --git a/core/modules/telephone/telephone.module b/core/modules/telephone/telephone.module
index e088958aad7ad910cfd3ae3ae23e6f6c69a899b1..df2acc2518f19e9d2d173f5cf168c76ca9382ac0 100644
--- a/core/modules/telephone/telephone.module
+++ b/core/modules/telephone/telephone.module
@@ -15,11 +15,11 @@ function telephone_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.telephone':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Telephone module allows you to create fields that contain telephone numbers. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":telephone_documentation">online documentation for the Telephone module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':telephone_documentation' => 'https://www.drupal.org/documentation/modules/telephone')) . '</p>';
+      $output .= '<p>' . t('The Telephone module allows you to create fields that contain telephone numbers. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":telephone_documentation">online documentation for the Telephone module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':telephone_documentation' => 'https://www.drupal.org/documentation/modules/telephone']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing and displaying telephone fields') . '</dt>';
-      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the telephone field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the telephone field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Displaying telephone numbers as links') . '</dt>';
       $output .= '<dd>' . t('Telephone numbers can be displayed as links with the scheme name <em>tel:</em> by choosing the <em>Telephone</em> display format on the <em>Manage display</em> page. Any spaces will be stripped out of the link text. This semantic markup improves the user experience on mobile and assistive technology devices.') . '</dd>';
       $output .= '</dl>';
diff --git a/core/modules/telephone/tests/src/Functional/TelephoneFieldTest.php b/core/modules/telephone/tests/src/Functional/TelephoneFieldTest.php
index 7f536c455298ed74be162140ad5a8614bdb7f8c6..7256c9da39c9d1cc7fad0fb77734bd162ae640ee 100644
--- a/core/modules/telephone/tests/src/Functional/TelephoneFieldTest.php
+++ b/core/modules/telephone/tests/src/Functional/TelephoneFieldTest.php
@@ -18,11 +18,11 @@ class TelephoneFieldTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'field',
     'node',
     'telephone'
-  );
+  ];
 
   /**
    * A user with permission to create articles.
@@ -34,8 +34,8 @@ class TelephoneFieldTest extends BrowserTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'article'));
-    $this->webUser = $this->drupalCreateUser(array('create article content', 'edit own article content'));
+    $this->drupalCreateContentType(['type' => 'article']);
+    $this->webUser = $this->drupalCreateUser(['create article content', 'edit own article content']);
     $this->drupalLogin($this->webUser);
   }
 
@@ -47,11 +47,11 @@ protected function setUp() {
   function testTelephoneField() {
 
     // Add the telephone field to the article content type.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_telephone',
       'entity_type' => 'node',
       'type' => 'telephone',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'field_name' => 'field_telephone',
       'label' => 'Telephone Number',
@@ -60,19 +60,19 @@ function testTelephoneField() {
     ])->save();
 
     entity_get_form_display('node', 'article', 'default')
-      ->setComponent('field_telephone', array(
+      ->setComponent('field_telephone', [
         'type' => 'telephone_default',
-        'settings' => array(
+        'settings' => [
           'placeholder' => '123-456-7890',
-        ),
-      ))
+        ],
+      ])
       ->save();
 
     entity_get_display('node', 'article', 'default')
-      ->setComponent('field_telephone', array(
+      ->setComponent('field_telephone', [
         'type' => 'telephone_link',
         'weight' => 1,
-      ))
+      ])
       ->save();
 
     // Display creation form.
@@ -81,19 +81,19 @@ function testTelephoneField() {
     $this->assertRaw('placeholder="123-456-7890"');
 
     // Test basic entry of telephone field.
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
       'field_telephone[0][value]' => "123456789",
-    );
+    ];
 
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertRaw('<a href="tel:123456789">', 'A telephone link is provided on the article node page.');
 
     // Add number with a space in it. Need to ensure it is stripped on output.
-    $edit = array(
+    $edit = [
       'title[0][value]' => $this->randomMachineName(),
       'field_telephone[0][value]' => "1234 56789",
-    );
+    ];
 
     $this->drupalPostForm('node/add/article', $edit, t('Save'));
     $this->assertRaw('<a href="tel:123456789">', 'Telephone link is output with whitespace removed.');
diff --git a/core/modules/telephone/tests/src/Kernel/TelephoneItemTest.php b/core/modules/telephone/tests/src/Kernel/TelephoneItemTest.php
index 7f94ba3b163a151ca35fb6b1dce222addc890b1d..72269409e4387b6e6c6e08ef964cac5c7d2193f8 100644
--- a/core/modules/telephone/tests/src/Kernel/TelephoneItemTest.php
+++ b/core/modules/telephone/tests/src/Kernel/TelephoneItemTest.php
@@ -21,17 +21,17 @@ class TelephoneItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('telephone');
+  public static $modules = ['telephone'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create a telephone field storage and field for validation.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_test',
       'entity_type' => 'entity_test',
       'type' => 'telephone',
-    ))->save();
+    ])->save();
     FieldConfig::create([
       'entity_type' => 'entity_test',
       'field_name' => 'field_test',
diff --git a/core/modules/text/src/Plugin/Field/FieldFormatter/TextDefaultFormatter.php b/core/modules/text/src/Plugin/Field/FieldFormatter/TextDefaultFormatter.php
index 0a78114185f2e570d813c5e6618932e770e03da8..e746716995a2c591577b580cc3d1035717fa3db0 100644
--- a/core/modules/text/src/Plugin/Field/FieldFormatter/TextDefaultFormatter.php
+++ b/core/modules/text/src/Plugin/Field/FieldFormatter/TextDefaultFormatter.php
@@ -24,17 +24,17 @@ class TextDefaultFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     // The ProcessedText element already handles cache context & tag bubbling.
     // @see \Drupal\filter\Element\ProcessedText::preRenderText()
     foreach ($items as $delta => $item) {
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#type' => 'processed_text',
         '#text' => $item->value,
         '#format' => $item->format,
         '#langcode' => $item->getLangcode(),
-      );
+      ];
     }
 
     return $elements;
diff --git a/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php b/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
index 8d69571a50d0e8f3422837a3a2ab8a99fff905ea..65852382bd4bcc8f1e6f12eebeeca0e224a60766 100644
--- a/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
+++ b/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
@@ -33,24 +33,24 @@ class TextTrimmedFormatter extends FormatterBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'trim_length' => '600',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['trim_length'] = array(
+    $element['trim_length'] = [
       '#title' => t('Trimmed limit'),
       '#type' => 'number',
       '#field_suffix' => t('characters'),
       '#default_value' => $this->getSetting('trim_length'),
-      '#description' => t('If the summary is not set, the trimmed %label field will end at the last full sentence before this character limit.', array('%label' => $this->fieldDefinition->getLabel())),
+      '#description' => t('If the summary is not set, the trimmed %label field will end at the last full sentence before this character limit.', ['%label' => $this->fieldDefinition->getLabel()]),
       '#min' => 1,
       '#required' => TRUE,
-    );
+    ];
     return $element;
   }
 
@@ -58,8 +58,8 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
-    $summary[] = t('Trimmed limit: @trim_length characters', array('@trim_length' => $this->getSetting('trim_length')));
+    $summary = [];
+    $summary[] = t('Trimmed limit: @trim_length characters', ['@trim_length' => $this->getSetting('trim_length')]);
     return $summary;
   }
 
@@ -67,7 +67,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     $render_as_summary = function (&$element) {
       // Make sure any default #pre_render callbacks are set on the element,
@@ -82,12 +82,12 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
     // The ProcessedText element already handles cache context & tag bubbling.
     // @see \Drupal\filter\Element\ProcessedText::preRenderText()
     foreach ($items as $delta => $item) {
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#type' => 'processed_text',
         '#text' => NULL,
         '#format' => $item->format,
         '#langcode' => $item->getLangcode(),
-      );
+      ];
 
       if ($this->getPluginId() == 'text_summary_or_trimmed' && !empty($item->summary)) {
         $elements[$delta]['#text'] = $item->summary;
diff --git a/core/modules/text/src/Plugin/Field/FieldType/TextItem.php b/core/modules/text/src/Plugin/Field/FieldType/TextItem.php
index ed896ad583bebb64f9031ec5f5afc296f631dcae..447a0b180d5b2592d4f6b5ff722c5127bfc77259 100644
--- a/core/modules/text/src/Plugin/Field/FieldType/TextItem.php
+++ b/core/modules/text/src/Plugin/Field/FieldType/TextItem.php
@@ -23,30 +23,30 @@ class TextItem extends TextItemBase {
    * {@inheritdoc}
    */
   public static function defaultStorageSettings() {
-    return array(
+    return [
       'max_length' => 255,
-    ) + parent::defaultStorageSettings();
+    ] + parent::defaultStorageSettings();
   }
 
   /**
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => $field_definition->getSetting('max_length'),
-        ),
-        'format' => array(
+        ],
+        'format' => [
           'type' => 'varchar',
           'length' => 255,
-        ),
-      ),
-      'indexes' => array(
-        'format' => array('format'),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'format' => ['format'],
+      ],
+    ];
   }
 
   /**
@@ -57,14 +57,14 @@ public function getConstraints() {
     $constraints = parent::getConstraints();
 
     if ($max_length = $this->getSetting('max_length')) {
-      $constraints[] = $constraint_manager->create('ComplexData', array(
-        'value' => array(
-          'Length' => array(
+      $constraints[] = $constraint_manager->create('ComplexData', [
+        'value' => [
+          'Length' => [
             'max' => $max_length,
-            'maxMessage' => t('%name: the text may not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getLabel(), '@max' => $max_length)),
-          )
-        ),
-      ));
+            'maxMessage' => t('%name: the text may not be longer than @max characters.', ['%name' => $this->getFieldDefinition()->getLabel(), '@max' => $max_length]),
+          ]
+        ],
+      ]);
     }
 
     return $constraints;
@@ -74,9 +74,9 @@ public function getConstraints() {
    * {@inheritdoc}
    */
   public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
-    $element = array();
+    $element = [];
 
-    $element['max_length'] = array(
+    $element['max_length'] = [
       '#type' => 'number',
       '#title' => t('Maximum length'),
       '#default_value' => $this->getSetting('max_length'),
@@ -84,7 +84,7 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
       '#description' => t('The maximum length of the field in characters.'),
       '#min' => 1,
       '#disabled' => $has_data,
-    );
+    ];
     $element += parent::storageSettingsForm($form, $form_state, $has_data);
 
     return $element;
diff --git a/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php b/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
index 83cea4ff5ee88e670e740fdbdf8298604a11b290..6dd433929922ade0d81f9864354baefbe540631e 100644
--- a/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
+++ b/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
@@ -39,7 +39,7 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    */
   public function applyDefaultValue($notify = TRUE) {
     // @todo: Add in the filter default format here.
-    $this->setValue(array('format' => NULL), $notify);
+    $this->setValue(['format' => NULL], $notify);
     return $this;
   }
 
@@ -82,11 +82,11 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
       $value = substr($random->sentences(mt_rand(1, $settings['max_length'] / 3), FALSE), 0, $settings['max_length']);
     }
 
-    $values = array(
+    $values = [
       'value' => $value,
       'summary' => $value,
       'format' => filter_fallback_format(),
-    );
+    ];
     return $values;
   }
 
diff --git a/core/modules/text/src/Plugin/Field/FieldType/TextLongItem.php b/core/modules/text/src/Plugin/Field/FieldType/TextLongItem.php
index cf1f61634db26d63ca855f3ce8f41f62afc44b39..15e4eb6a84589964e88044c47ef969c9ce51f99e 100644
--- a/core/modules/text/src/Plugin/Field/FieldType/TextLongItem.php
+++ b/core/modules/text/src/Plugin/Field/FieldType/TextLongItem.php
@@ -22,21 +22,21 @@ class TextLongItem extends TextItemBase {
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'text',
           'size' => 'big',
-        ),
-        'format' => array(
+        ],
+        'format' => [
           'type' => 'varchar_ascii',
           'length' => 255,
-        ),
-      ),
-      'indexes' => array(
-        'format' => array('format'),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'format' => ['format'],
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/text/src/Plugin/Field/FieldType/TextWithSummaryItem.php b/core/modules/text/src/Plugin/Field/FieldType/TextWithSummaryItem.php
index d42e3a783988bdd4b264a5069685f647d0479354..6af6d0431fba0b84b499bf0c34dc3eec5f9e7185 100644
--- a/core/modules/text/src/Plugin/Field/FieldType/TextWithSummaryItem.php
+++ b/core/modules/text/src/Plugin/Field/FieldType/TextWithSummaryItem.php
@@ -24,9 +24,9 @@ class TextWithSummaryItem extends TextItemBase {
    * {@inheritdoc}
    */
   public static function defaultFieldSettings() {
-    return array(
+    return [
       'display_summary' => 0,
-    ) + parent::defaultFieldSettings();
+    ] + parent::defaultFieldSettings();
   }
 
   /**
@@ -52,25 +52,25 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    * {@inheritdoc}
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
+    return [
+      'columns' => [
+        'value' => [
           'type' => 'text',
           'size' => 'big',
-        ),
-        'summary' => array(
+        ],
+        'summary' => [
           'type' => 'text',
           'size' => 'big',
-        ),
-        'format' => array(
+        ],
+        'format' => [
           'type' => 'varchar_ascii',
           'length' => 255,
-        ),
-      ),
-      'indexes' => array(
-        'format' => array('format'),
-      ),
-    );
+        ],
+      ],
+      'indexes' => [
+        'format' => ['format'],
+      ],
+    ];
   }
 
   /**
@@ -85,15 +85,15 @@ public function isEmpty() {
    * {@inheritdoc}
    */
   public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
-    $element = array();
+    $element = [];
     $settings = $this->getSettings();
 
-    $element['display_summary'] = array(
+    $element['display_summary'] = [
       '#type' => 'checkbox',
       '#title' => t('Summary input'),
       '#default_value' => $settings['display_summary'],
       '#description' => t('This allows authors to input an explicit summary, to be displayed instead of the automatically trimmed text when using the "Summary or trimmed" display type.'),
-    );
+    ];
 
     return $element;
   }
diff --git a/core/modules/text/src/Plugin/Field/FieldWidget/TextareaWidget.php b/core/modules/text/src/Plugin/Field/FieldWidget/TextareaWidget.php
index 8688efb83bbc03cd5c32768f79c46ba5754d86cf..69a660e4db47f0b9f3d48fd55c166eec1b9a58be 100644
--- a/core/modules/text/src/Plugin/Field/FieldWidget/TextareaWidget.php
+++ b/core/modules/text/src/Plugin/Field/FieldWidget/TextareaWidget.php
@@ -46,7 +46,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
    * {@inheritdoc}
    */
   public function errorElement(array $element, ConstraintViolationInterface $violation, array $form, FormStateInterface $form_state) {
-    if ($violation->arrayPropertyPath == array('format') && isset($element['format']['#access']) && !$element['format']['#access']) {
+    if ($violation->arrayPropertyPath == ['format'] && isset($element['format']['#access']) && !$element['format']['#access']) {
       // Ignore validation errors for formats if formats may not be changed,
       // i.e. when existing formats become invalid. See filter_process_format().
       return FALSE;
diff --git a/core/modules/text/src/Plugin/Field/FieldWidget/TextareaWithSummaryWidget.php b/core/modules/text/src/Plugin/Field/FieldWidget/TextareaWithSummaryWidget.php
index 2afd14b0d18cec361947335d98e0451b066889cc..e50e5cb232b445bc089cab5356eb613858e70d22 100644
--- a/core/modules/text/src/Plugin/Field/FieldWidget/TextareaWithSummaryWidget.php
+++ b/core/modules/text/src/Plugin/Field/FieldWidget/TextareaWithSummaryWidget.php
@@ -23,11 +23,11 @@ class TextareaWithSummaryWidget extends TextareaWidget {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'rows' => '9',
       'summary_rows' => '3',
       'placeholder' => '',
-    ) + parent::defaultSettings();
+    ] + parent::defaultSettings();
   }
 
   /**
@@ -35,14 +35,14 @@ public static function defaultSettings() {
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $element = parent::settingsForm($form, $form_state);
-    $element['summary_rows'] = array(
+    $element['summary_rows'] = [
       '#type' => 'number',
       '#title' => t('Summary rows'),
       '#default_value' => $this->getSetting('summary_rows'),
       '#description' => $element['rows']['#description'],
       '#required' => TRUE,
       '#min' => 1,
-    );
+    ];
     return $element;
   }
 
@@ -52,7 +52,7 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
   public function settingsSummary() {
     $summary = parent::settingsSummary();
 
-    $summary[] = t('Number of summary rows: @rows', array('@rows' => $this->getSetting('summary_rows')));
+    $summary[] = t('Number of summary rows: @rows', ['@rows' => $this->getSetting('summary_rows')]);
 
     return $summary;
   }
@@ -64,20 +64,20 @@ function formElement(FieldItemListInterface $items, $delta, array $element, arra
     $element = parent::formElement($items, $delta, $element, $form, $form_state);
 
     $display_summary = $items[$delta]->summary || $this->getFieldSetting('display_summary');
-    $element['summary'] = array(
+    $element['summary'] = [
       '#type' => $display_summary ? 'textarea' : 'value',
       '#default_value' => $items[$delta]->summary,
       '#title' => t('Summary'),
       '#rows' => $this->getSetting('summary_rows'),
       '#description' => t('Leave blank to use trimmed value of full text as the summary.'),
-      '#attached' => array(
-        'library' => array('text/drupal.text'),
-      ),
-      '#attributes' => array('class' => array('js-text-summary', 'text-summary')),
+      '#attached' => [
+        'library' => ['text/drupal.text'],
+      ],
+      '#attributes' => ['class' => ['js-text-summary', 'text-summary']],
       '#prefix' => '<div class="js-text-summary-wrapper text-summary-wrapper">',
       '#suffix' => '</div>',
       '#weight' => -10,
-    );
+    ];
 
     return $element;
   }
diff --git a/core/modules/text/src/Plugin/Field/FieldWidget/TextfieldWidget.php b/core/modules/text/src/Plugin/Field/FieldWidget/TextfieldWidget.php
index 5a3ed05bae341058eeea424b124694f91f121f27..af8493de0837bc05e801e13e023354e58e9f6f0d 100644
--- a/core/modules/text/src/Plugin/Field/FieldWidget/TextfieldWidget.php
+++ b/core/modules/text/src/Plugin/Field/FieldWidget/TextfieldWidget.php
@@ -37,7 +37,7 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
    * {@inheritdoc}
    */
   public function errorElement(array $element, ConstraintViolationInterface $violation, array $form, FormStateInterface $form_state) {
-    if ($violation->arrayPropertyPath == array('format') && isset($element['format']['#access']) && !$element['format']['#access']) {
+    if ($violation->arrayPropertyPath == ['format'] && isset($element['format']['#access']) && !$element['format']['#access']) {
       // Ignore validation errors for formats if formats may not be changed,
       // i.e. when existing formats become invalid. See filter_process_format().
       return FALSE;
diff --git a/core/modules/text/src/Plugin/migrate/cckfield/TextField.php b/core/modules/text/src/Plugin/migrate/cckfield/TextField.php
index 89475ffd220bf01b12d9692594555edb00d96a13..24dd450d85f252288f2d03d09bafc5c9222281f7 100644
--- a/core/modules/text/src/Plugin/migrate/cckfield/TextField.php
+++ b/core/modules/text/src/Plugin/migrate/cckfield/TextField.php
@@ -87,11 +87,11 @@ public function processCckFieldValues(MigrationInterface $migration, $field_name
       ];
     }
 
-    $process = array(
+    $process = [
       'plugin' => 'iterator',
       'source' => $field_name,
       'process' => $process,
-    );
+    ];
     $migration->setProcessOfProperty($field_name, $process);
   }
 
diff --git a/core/modules/text/src/Tests/TextFieldTest.php b/core/modules/text/src/Tests/TextFieldTest.php
index 993346a0793b139c88150b4e769d0b6ea028e50f..5bd6d6f0257b0f06c5f412dfaeea81cd9438158f 100644
--- a/core/modules/text/src/Tests/TextFieldTest.php
+++ b/core/modules/text/src/Tests/TextFieldTest.php
@@ -26,7 +26,7 @@ class TextFieldTest extends StringFieldTest {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer filters'));
+    $this->adminUser = $this->drupalCreateUser(['administer filters']);
   }
 
   // Test fields.
@@ -38,14 +38,14 @@ function testTextFieldValidation() {
     // Create a field with settings to validate.
     $max_length = 3;
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'text',
-      'settings' => array(
+      'settings' => [
         'max_length' => $max_length,
-      )
-    ));
+      ]
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -72,11 +72,11 @@ function testTextFieldValidation() {
   function testRequiredLongTextWithFileUpload() {
     // Create a text field.
     $text_field_name = 'text_long';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $text_field_name,
       'entity_type' => 'entity_test',
       'type' => 'text_with_summary',
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -87,11 +87,11 @@ function testRequiredLongTextWithFileUpload() {
 
     // Create a file field.
     $file_field_name = 'file_field';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $file_field_name,
       'entity_type' => 'entity_test',
       'type' => 'file'
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -100,12 +100,12 @@ function testRequiredLongTextWithFileUpload() {
     ])->save();
 
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($text_field_name, array(
+      ->setComponent($text_field_name, [
         'type' => 'text_textarea_with_summary',
-      ))
-      ->setComponent($file_field_name, array(
+      ])
+      ->setComponent($file_field_name, [
         'type' => 'file_generic',
-      ))
+      ])
       ->save();
     entity_get_display('entity_test', 'entity_test', 'full')
       ->setComponent($text_field_name)
@@ -116,9 +116,9 @@ function testRequiredLongTextWithFileUpload() {
     $edit['files[file_field_0]'] = drupal_realpath($test_file->uri);
     $this->drupalPostForm('entity_test/add', $edit, 'Upload');
     $this->assertResponse(200);
-    $edit = array(
+    $edit = [
       'text_long[0][value]' => 'Long text'
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, 'Save');
     $this->assertResponse(200);
     $this->drupalGet('entity_test/1');
@@ -150,11 +150,11 @@ function _testTextfieldWidgetsFormatted($field_type, $widget_type) {
 
     // Create a field.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => $field_type
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
@@ -162,9 +162,9 @@ function _testTextfieldWidgetsFormatted($field_type, $widget_type) {
       'label' => $this->randomMachineName() . '_label',
     ])->save();
     entity_get_form_display('entity_test', 'entity_test', 'default')
-      ->setComponent($field_name, array(
+      ->setComponent($field_name, [
         'type' => $widget_type,
-      ))
+      ])
       ->save();
     entity_get_display('entity_test', 'entity_test', 'full')
       ->setComponent($field_name)
@@ -174,7 +174,7 @@ function _testTextfieldWidgetsFormatted($field_type, $widget_type) {
     $this->drupalLogin($this->adminUser);
     foreach (filter_formats() as $format) {
       if (!$format->isFallbackFormat()) {
-        $this->drupalPostForm('admin/config/content/formats/manage/' . $format->id() . '/disable', array(), t('Disable'));
+        $this->drupalPostForm('admin/config/content/formats/manage/' . $format->id() . '/disable', [], t('Disable'));
       }
     }
     $this->drupalLogin($this->webUser);
@@ -187,13 +187,13 @@ function _testTextfieldWidgetsFormatted($field_type, $widget_type) {
 
     // Submit with data that should be filtered.
     $value = '<em>' . $this->randomMachineName() . '</em>';
-    $edit = array(
+    $edit = [
       "{$field_name}[0][value]" => $value,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
     $id = $match[1];
-    $this->assertText(t('entity_test @id has been created.', array('@id' => $id)), 'Entity was created');
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]), 'Entity was created');
 
     // Display the entity.
     $entity = EntityTest::load($id);
@@ -206,10 +206,10 @@ function _testTextfieldWidgetsFormatted($field_type, $widget_type) {
     // Create a new text format that does not escape HTML, and grant the user
     // access to it.
     $this->drupalLogin($this->adminUser);
-    $edit = array(
+    $edit = [
       'format' => Unicode::strtolower($this->randomMachineName()),
       'name' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('admin/config/content/formats/add', $edit, t('Save configuration'));
     filter_formats_reset();
     $format = FilterFormat::load($edit['format']);
@@ -217,7 +217,7 @@ function _testTextfieldWidgetsFormatted($field_type, $widget_type) {
     $permission = $format->getPermissionName();
     $roles = $this->webUser->getRoles();
     $rid = $roles[0];
-    user_role_grant_permissions($rid, array($permission));
+    user_role_grant_permissions($rid, [$permission]);
     $this->drupalLogin($this->webUser);
 
     // Display edition form.
@@ -227,14 +227,14 @@ function _testTextfieldWidgetsFormatted($field_type, $widget_type) {
     $this->assertFieldByName("{$field_name}[0][format]", NULL, 'Format selector is displayed');
 
     // Edit and change the text format to the new one that was created.
-    $edit = array(
+    $edit = [
       "{$field_name}[0][format]" => $format_id,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('entity_test @id has been updated.', array('@id' => $id)), 'Entity was updated');
+    $this->assertText(t('entity_test @id has been updated.', ['@id' => $id]), 'Entity was updated');
 
     // Display the entity.
-    $this->container->get('entity.manager')->getStorage('entity_test')->resetCache(array($id));
+    $this->container->get('entity.manager')->getStorage('entity_test')->resetCache([$id]);
     $entity = EntityTest::load($id);
     $display = entity_get_display($entity->getEntityTypeId(), $entity->bundle(), 'full');
     $content = $display->build($entity);
diff --git a/core/modules/text/tests/src/Kernel/TextFormatterTest.php b/core/modules/text/tests/src/Kernel/TextFormatterTest.php
index 747a06ffa92d9974d6685bfcc29c7f47e9aabeb6..c75ac34bc439bcf692261e3208b5f85acff8eb10 100644
--- a/core/modules/text/tests/src/Kernel/TextFormatterTest.php
+++ b/core/modules/text/tests/src/Kernel/TextFormatterTest.php
@@ -33,7 +33,7 @@ class TextFormatterTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('text');
+  public static $modules = ['text'];
 
   /**
    * {@inheritdoc}
@@ -41,23 +41,23 @@ class TextFormatterTest extends EntityKernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    FilterFormat::create(array(
+    FilterFormat::create([
       'format' => 'my_text_format',
       'name' => 'My text format',
-      'filters' => array(
-        'filter_autop' => array(
+      'filters' => [
+        'filter_autop' => [
           'module' => 'filter',
           'status' => TRUE,
-        ),
-      ),
-    ))->save();
+        ],
+      ],
+    ])->save();
 
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'formatted_text',
       'entity_type' => $this->entityType,
       'type' => 'text',
-      'settings' => array(),
-    ))->save();
+      'settings' => [],
+    ])->save();
     FieldConfig::create([
       'entity_type' => $this->entityType,
       'bundle' => $this->bundle,
@@ -70,28 +70,28 @@ protected function setUp() {
    * Tests all text field formatters.
    */
   public function testFormatters() {
-    $formatters = array(
+    $formatters = [
       'text_default',
       'text_trimmed',
       'text_summary_or_trimmed',
-    );
+    ];
 
     // Create the entity to be referenced.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => $this->randomMachineName()));
-    $entity->formatted_text = array(
+      ->create(['name' => $this->randomMachineName()]);
+    $entity->formatted_text = [
       'value' => 'Hello, world!',
       'format' => 'my_text_format',
-    );
+    ];
     $entity->save();
 
     foreach ($formatters as $formatter) {
       // Verify the text field formatter's render array.
-      $build = $entity->get('formatted_text')->view(array('type' => $formatter));
+      $build = $entity->get('formatted_text')->view(['type' => $formatter]);
       \Drupal::service('renderer')->renderRoot($build[0]);
       $this->assertEqual($build[0]['#markup'], "<p>Hello, world!</p>\n");
-      $this->assertEqual($build[0]['#cache']['tags'], FilterFormat::load('my_text_format')->getCacheTags(), format_string('The @formatter formatter has the expected cache tags when formatting a formatted text field.', array('@formatter' => $formatter)));
+      $this->assertEqual($build[0]['#cache']['tags'], FilterFormat::load('my_text_format')->getCacheTags(), format_string('The @formatter formatter has the expected cache tags when formatting a formatted text field.', ['@formatter' => $formatter]));
     }
   }
 
diff --git a/core/modules/text/tests/src/Kernel/TextSummaryTest.php b/core/modules/text/tests/src/Kernel/TextSummaryTest.php
index abc0b68bc81b3bd665926b157aa3c30617e2b9ab..62464e3dc5a9c00cdc195e090871ada70afd9d61 100644
--- a/core/modules/text/tests/src/Kernel/TextSummaryTest.php
+++ b/core/modules/text/tests/src/Kernel/TextSummaryTest.php
@@ -12,12 +12,12 @@
  */
 class TextSummaryTest extends KernelTestBase {
 
-  public static $modules = array('system', 'user', 'filter', 'text');
+  public static $modules = ['system', 'user', 'filter', 'text'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->installConfig(array('text'));
+    $this->installConfig(['text']);
   }
 
   /**
@@ -50,25 +50,25 @@ function testLongSentence() {
    * Test various summary length edge cases.
    */
   function testLength() {
-    FilterFormat::create(array(
+    FilterFormat::create([
       'format' => 'autop',
-      'filters' => array(
-        'filter_autop' => array(
+      'filters' => [
+        'filter_autop' => [
           'status' => 1,
-        ),
-      ),
-    ))->save();
-    FilterFormat::create(array(
+        ],
+      ],
+    ])->save();
+    FilterFormat::create([
       'format' => 'autop_correct',
-      'filters' => array(
-        'filter_autop' => array(
+      'filters' => [
+        'filter_autop' => [
           'status' => 1,
-        ),
-        'filter_htmlcorrector' => array(
+        ],
+        'filter_htmlcorrector' => [
           'status' => 1,
-        ),
-      ),
-    ))->save();
+        ],
+      ],
+    ])->save();
 
     // This string tests a number of edge cases.
     $text = "<p>\nHi\n</p>\n<p>\nfolks\n<br />\n!\n</p>";
@@ -207,10 +207,10 @@ function testLength() {
    */
   function assertTextSummary($text, $expected, $format = NULL, $size = NULL) {
     $summary = text_summary($text, $format, $size);
-    $this->assertIdentical($summary, $expected, format_string('<pre style="white-space: pre-wrap">@actual</pre> is identical to <pre style="white-space: pre-wrap">@expected</pre>', array(
+    $this->assertIdentical($summary, $expected, format_string('<pre style="white-space: pre-wrap">@actual</pre> is identical to <pre style="white-space: pre-wrap">@expected</pre>', [
       '@actual' => $summary,
       '@expected' => $expected,
-    )));
+    ]));
   }
 
 }
diff --git a/core/modules/text/tests/src/Kernel/TextWithSummaryItemTest.php b/core/modules/text/tests/src/Kernel/TextWithSummaryItemTest.php
index fc02daa7e92417b9ff21f4162148b6006e31e222..a48c191b5ee721811054a35ad20f393b2ce6ec53 100644
--- a/core/modules/text/tests/src/Kernel/TextWithSummaryItemTest.php
+++ b/core/modules/text/tests/src/Kernel/TextWithSummaryItemTest.php
@@ -21,7 +21,7 @@ class TextWithSummaryItemTest extends FieldKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter');
+  public static $modules = ['filter'];
 
   /**
    * Field storage entity.
@@ -44,11 +44,11 @@ protected function setUp() {
     $this->installEntitySchema('entity_test_rev');
 
     // Create the necessary formats.
-    $this->installConfig(array('filter'));
-    FilterFormat::create(array(
+    $this->installConfig(['filter']);
+    FilterFormat::create([
       'format' => 'no_filters',
-      'filters' => array(),
-    ))->save();
+      'filters' => [],
+    ])->save();
   }
 
   /**
@@ -100,14 +100,14 @@ public function testCrudAndUpdate() {
    */
   protected function createField($entity_type) {
     // Create a field .
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => 'summary_field',
       'entity_type' => $entity_type,
       'type' => 'text_with_summary',
-      'settings' => array(
+      'settings' => [
         'max_length' => 10,
-      )
-    ));
+      ]
+    ]);
     $this->fieldStorage->save();
     $this->field = FieldConfig::create([
       'field_storage' => $this->fieldStorage,
diff --git a/core/modules/text/tests/src/Unit/Migrate/TextFieldTest.php b/core/modules/text/tests/src/Unit/Migrate/TextFieldTest.php
index 323fbce8cb98a1494afefac7b349dda992123f1b..d7dfcc679eae4150189673cbea552564cc810c2a 100644
--- a/core/modules/text/tests/src/Unit/Migrate/TextFieldTest.php
+++ b/core/modules/text/tests/src/Unit/Migrate/TextFieldTest.php
@@ -71,12 +71,12 @@ public function testProcessFilteredTextFieldValues() {
    * @covers ::processCckFieldValues
    */
   public function testProcessBooleanTextImplicitValues() {
-    $info = array(
+    $info = [
       'widget_type' => 'optionwidgets_onoff',
-      'global_settings' => array(
+      'global_settings' => [
         'allowed_values' => "foo\nbar",
-      )
-    );
+      ]
+    ];
     $this->plugin->processCckFieldValues($this->migration, 'field', $info);
 
     $expected = [
@@ -96,12 +96,12 @@ public function testProcessBooleanTextImplicitValues() {
    * @covers ::processCckFieldValues
    */
   public function testProcessBooleanTextExplicitValues() {
-    $info = array(
+    $info = [
       'widget_type' => 'optionwidgets_onoff',
-      'global_settings' => array(
+      'global_settings' => [
         'allowed_values' => "foo|Foo\nbaz|Baz",
-      )
-    );
+      ]
+    ];
     $this->plugin->processCckFieldValues($this->migration, 'field', $info);
 
     $expected = [
@@ -121,43 +121,43 @@ public function testProcessBooleanTextExplicitValues() {
    * Data provider for testGetFieldType().
    */
   public function getFieldTypeProvider() {
-    return array(
-      array('string_long', 'text_textfield', array(
+    return [
+      ['string_long', 'text_textfield', [
         'text_processing' => FALSE,
-      )),
-      array('string', 'text_textfield', array(
+      ]],
+      ['string', 'text_textfield', [
         'text_processing' => FALSE,
         'max_length' => 128,
-      )),
-      array('string_long', 'text_textfield', array(
+      ]],
+      ['string_long', 'text_textfield', [
         'text_processing' => FALSE,
         'max_length' => 4096,
-      )),
-      array('text_long', 'text_textfield', array(
+      ]],
+      ['text_long', 'text_textfield', [
         'text_processing' => TRUE,
-      )),
-      array('text', 'text_textfield', array(
+      ]],
+      ['text', 'text_textfield', [
         'text_processing' => TRUE,
         'max_length' => 128,
-      )),
-      array('text_long', 'text_textfield', array(
+      ]],
+      ['text_long', 'text_textfield', [
         'text_processing' => TRUE,
         'max_length' => 4096,
-      )),
-      array('list_string', 'optionwidgets_buttons'),
-      array('list_string', 'optionwidgets_select'),
-      array('boolean', 'optionwidgets_onoff'),
-      array('text_long', 'text_textarea'),
-      array(NULL, 'undefined'),
-    );
+      ]],
+      ['list_string', 'optionwidgets_buttons'],
+      ['list_string', 'optionwidgets_select'],
+      ['boolean', 'optionwidgets_onoff'],
+      ['text_long', 'text_textarea'],
+      [NULL, 'undefined'],
+    ];
   }
 
   /**
    * @covers ::getFieldType
    * @dataProvider getFieldTypeProvider
    */
-  public function testGetFieldType($expected_type, $widget_type, array $settings = array()) {
-    $row = new Row(array('widget_type' => $widget_type), array('widget_type' => array()));
+  public function testGetFieldType($expected_type, $widget_type, array $settings = []) {
+    $row = new Row(['widget_type' => $widget_type], ['widget_type' => []]);
     $row->setSourceProperty('global_settings', $settings);
     $this->assertSame($expected_type, $this->plugin->getFieldType($row));
   }
diff --git a/core/modules/text/text.module b/core/modules/text/text.module
index 906b4614ae11547811d04da2a6e4c833c0344528..1932e616496630ea4c5af480c637a4996607d3ac 100644
--- a/core/modules/text/text.module
+++ b/core/modules/text/text.module
@@ -18,11 +18,11 @@ function text_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.text':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Text module allows you to create short and long text fields with optional summaries. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":text_documentation">online documentation for the Text module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':text_documentation' => 'https://www.drupal.org/documentation/modules/text')) . '</p>';
+      $output .= '<p>' . t('The Text module allows you to create short and long text fields with optional summaries. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":text_documentation">online documentation for the Text module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':text_documentation' => 'https://www.drupal.org/documentation/modules/text']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Managing and displaying text fields') . '</dt>';
-      $output .= '<dd>' . t('The <em>settings</em> and <em>display</em> of the text field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('The <em>settings</em> and <em>display</em> of the text field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
       $output .= '<dt>' . t('Creating short text fields') . '</dt>';
       $output .= '<dd>' . t('If you choose <em>Text (plain)</em> or <em>Text (formatted)</em> as the field type on the <em>Manage fields</em> page, then a field with a single row is displayed. You can change the maximum text length in the <em>Field settings</em> when you set up the field.') . '</dd>';
       $output .= '<dt>' . t('Creating long text fields') . '</dt>';
@@ -32,7 +32,7 @@ function text_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<dt>' . t('Displaying summaries instead of trimmed text') . '</dt>';
       $output .= '<dd>' . t('As an alternative to using a trimmed version of the text, you can enter a separate summary by choosing the <em>Text (formatted, long, with summary)</em> field type on the <em>Manage fields</em> page. Even when <em>Summary input</em> is enabled, and summaries are provided, you can display <em>trimmed</em> text nonetheless by choosing the appropriate format on the <em>Manage display</em> page.') . '</dd>';
       $output .= '<dt>' . t('Using text formats and editors') . '</dt>';
-      $output .= '<dd>' . t('If you choose <em>Text (plain)</em> or <em>Text (plain, long)</em> you restrict the input to <em>Plain text</em> only. If you choose <em>Text (formatted)</em>, <em>Text (formatted, long)</em>, or <em>Text (formatted, long with summary)</em> you allow users to write formatted text. Which options are available to individual users depends on the settings on the <a href=":formats">Text formats and editors page</a>.', array(':formats' => \Drupal::url('filter.admin_overview'))) . '</dd>';
+      $output .= '<dd>' . t('If you choose <em>Text (plain)</em> or <em>Text (plain, long)</em> you restrict the input to <em>Plain text</em> only. If you choose <em>Text (formatted)</em>, <em>Text (formatted, long)</em>, or <em>Text (formatted, long with summary)</em> you allow users to write formatted text. Which options are available to individual users depends on the settings on the <a href=":formats">Text formats and editors page</a>.', [':formats' => \Drupal::url('filter.admin_overview')]) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
@@ -115,13 +115,13 @@ function text_summary($text, $format = NULL, $size = NULL) {
   $reversed = strrev($summary);
 
   // Build an array of arrays of break points grouped by preference.
-  $break_points = array();
+  $break_points = [];
 
   // A paragraph near the end of sliced summary is most preferable.
-  $break_points[] = array('</p>' => 0);
+  $break_points[] = ['</p>' => 0];
 
   // If no complete paragraph then treat line breaks as paragraphs.
-  $line_breaks = array('<br />' => 6, '<br>' => 4);
+  $line_breaks = ['<br />' => 6, '<br>' => 4];
   // Newline only indicates a line break if line break converter
   // filter is present.
   if (isset($format) && $filters->has('filter_autop') && $filters->get('filter_autop')->status) {
@@ -130,7 +130,7 @@ function text_summary($text, $format = NULL, $size = NULL) {
   $break_points[] = $line_breaks;
 
   // If the first paragraph is too long, split at the end of a sentence.
-  $break_points[] = array('. ' => 1, '! ' => 1, '? ' => 1, '。' => 0, '؟ ' => 1);
+  $break_points[] = ['. ' => 1, '! ' => 1, '? ' => 1, '。' => 0, '؟ ' => 1];
 
   // Iterate over the groups of break points until a break point is found.
   foreach ($break_points as $points) {
diff --git a/core/modules/toolbar/src/Element/Toolbar.php b/core/modules/toolbar/src/Element/Toolbar.php
index 69a53dbd855078cd19f7652f7bf99fa30650d79e..d92330b356b8174a99fd6d07cae7cd4a85a67a34 100644
--- a/core/modules/toolbar/src/Element/Toolbar.php
+++ b/core/modules/toolbar/src/Element/Toolbar.php
@@ -18,35 +18,35 @@ class Toolbar extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderToolbar'),
-      ),
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderToolbar'],
+      ],
       '#theme' => 'toolbar',
-      '#attached' => array(
-        'library' => array(
+      '#attached' => [
+        'library' => [
           'toolbar/toolbar',
-        ),
-      ),
+        ],
+      ],
       // Metadata for the toolbar wrapping element.
-      '#attributes' => array(
+      '#attributes' => [
         // The id cannot be simply "toolbar" or it will clash with the
         // simpletest tests listing which produces a checkbox with attribute
         // id="toolbar".
         'id' => 'toolbar-administration',
         'role' => 'group',
         'aria-label' => $this->t('Site administration toolbar'),
-      ),
+      ],
       // Metadata for the administration bar.
-      '#bar' => array(
+      '#bar' => [
         '#heading' => $this->t('Toolbar items'),
-        '#attributes' => array(
+        '#attributes' => [
           'id' => 'toolbar-bar',
           'role' => 'navigation',
           'aria-label' => $this->t('Toolbar items'),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -68,7 +68,7 @@ public static function preRenderToolbar($element) {
     // toolbar presentation.
     $breakpoints = static::breakpointManager()->getBreakpointsByGroup('toolbar');
     if (!empty($breakpoints)) {
-      $media_queries = array();
+      $media_queries = [];
       foreach ($breakpoints as $id => $breakpoint) {
         $media_queries[$id] = $breakpoint->getMediaQuery();
       }
@@ -82,7 +82,7 @@ public static function preRenderToolbar($element) {
     // Allow for altering of hook_toolbar().
     $module_handler->alter('toolbar', $items);
     // Sort the children.
-    uasort($items, array('\Drupal\Component\Utility\SortArray', 'sortByWeightProperty'));
+    uasort($items, ['\Drupal\Component\Utility\SortArray', 'sortByWeightProperty']);
 
     // Merge in the original toolbar values.
     $element = array_merge($element, $items);
diff --git a/core/modules/toolbar/src/Element/ToolbarItem.php b/core/modules/toolbar/src/Element/ToolbarItem.php
index e39295f1e7613c9bba2f8c690541c756f4bcb95f..79cbed2d032e757f3bbb2e079081a44e16037c4f 100644
--- a/core/modules/toolbar/src/Element/ToolbarItem.php
+++ b/core/modules/toolbar/src/Element/ToolbarItem.php
@@ -19,16 +19,16 @@ class ToolbarItem extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderToolbarItem'),
-      ),
-      'tab' => array(
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderToolbarItem'],
+      ],
+      'tab' => [
         '#type' => 'link',
         '#title' => NULL,
         '#url' => Url::fromRoute('<front>'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -47,33 +47,33 @@ public static function preRenderToolbarItem($element) {
     $id = $element['#id'];
 
     // Provide attributes for a toolbar item.
-    $attributes = array(
+    $attributes = [
       'id' => $id,
-    );
+    ];
 
     // If tray content is present, markup the tray and its associated trigger.
     if (!empty($element['tray'])) {
       // Provide attributes necessary for trays.
-      $attributes += array(
+      $attributes += [
         'data-toolbar-tray' => $id . '-tray',
         'aria-owns' => $id . '-tray',
         'role' => 'button',
         'aria-pressed' => 'false',
-      );
+      ];
 
       // Merge in module-provided attributes.
-      $element['tab'] += array('#attributes' => array());
+      $element['tab'] += ['#attributes' => []];
       $element['tab']['#attributes'] += $attributes;
       $element['tab']['#attributes']['class'][] = 'trigger';
 
       // Provide attributes for the tray theme wrapper.
-      $attributes = array(
+      $attributes = [
         'id' => $id . '-tray',
         'data-toolbar-tray' => $id . '-tray',
-      );
+      ];
       // Merge in module-provided attributes.
       if (!isset($element['tray']['#wrapper_attributes'])) {
-        $element['tray']['#wrapper_attributes'] = array();
+        $element['tray']['#wrapper_attributes'] = [];
       }
       $element['tray']['#wrapper_attributes'] += $attributes;
       $element['tray']['#wrapper_attributes']['class'][] = 'toolbar-tray';
diff --git a/core/modules/toolbar/src/Menu/ToolbarMenuLinkTree.php b/core/modules/toolbar/src/Menu/ToolbarMenuLinkTree.php
index 873ebec7ac8fdaec75b504c39c7df3b2c89fcd3e..24ef4e7720fd8dc7356cc6fd649a90a7b8fbfae9 100644
--- a/core/modules/toolbar/src/Menu/ToolbarMenuLinkTree.php
+++ b/core/modules/toolbar/src/Menu/ToolbarMenuLinkTree.php
@@ -15,7 +15,7 @@ class ToolbarMenuLinkTree extends MenuLinkTree {
   public function build(array $tree, $level = 0) {
     if ($level == 0) {
       if (!$tree) {
-        return array();
+        return [];
       }
       $build = parent::build($tree, $level);
 
diff --git a/core/modules/toolbar/src/Tests/ToolbarAdminMenuTest.php b/core/modules/toolbar/src/Tests/ToolbarAdminMenuTest.php
index dde6b518db74d7ec001a125f258aa4db12511d7e..e78f463d89252900ed0a1400098c841dd8154c52 100644
--- a/core/modules/toolbar/src/Tests/ToolbarAdminMenuTest.php
+++ b/core/modules/toolbar/src/Tests/ToolbarAdminMenuTest.php
@@ -53,12 +53,12 @@ class ToolbarAdminMenuTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'block', 'menu_ui', 'user', 'taxonomy', 'toolbar', 'language', 'test_page_test', 'locale');
+  public static $modules = ['node', 'block', 'menu_ui', 'user', 'taxonomy', 'toolbar', 'language', 'test_page_test', 'locale'];
 
   protected function setUp() {
     parent::setUp();
 
-    $perms = array(
+    $perms = [
       'access toolbar',
       'access administration pages',
       'administer site configuration',
@@ -75,7 +75,7 @@ protected function setUp() {
       'administer taxonomy',
       'administer languages',
       'translate interface',
-    );
+    ];
 
     // Create an administrative user and log it in.
     $this->adminUser = $this->drupalCreateUser($perms);
@@ -99,11 +99,11 @@ protected function setUp() {
    */
   function testModuleStatusChangeSubtreesHashCacheClear() {
     // Uninstall a module.
-    $edit = array();
+    $edit = [];
     $edit['uninstall[taxonomy]'] = TRUE;
     $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
     // Confirm the uninstall form.
-    $this->drupalPostForm(NULL, array(), t('Uninstall'));
+    $this->drupalPostForm(NULL, [], t('Uninstall'));
     $this->rebuildContainer();
 
     // Assert that the subtrees hash has been altered because the subtrees
@@ -111,7 +111,7 @@ function testModuleStatusChangeSubtreesHashCacheClear() {
     $this->assertDifferentHash();
 
     // Enable a module.
-    $edit = array();
+    $edit = [];
     $edit['modules[taxonomy][enable]'] = TRUE;
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
     $this->rebuildContainer();
@@ -129,7 +129,7 @@ function testMenuLinkUpdateSubtreesHashCacheClear() {
     $admin_menu_link_id = 'system.admin_config_development';
 
     // Disable the link.
-    $edit = array();
+    $edit = [];
     $edit['enabled'] = FALSE;
     $this->drupalPostForm("admin/structure/menu/link/" . $admin_menu_link_id . "/edit", $edit, t('Save'));
     $this->assertResponse(200);
@@ -150,7 +150,7 @@ function testUserRoleUpdateSubtreesHashCacheClear() {
     unset($all_rids[array_search(RoleInterface::AUTHENTICATED_ID, $all_rids)]);
     $rid = reset($all_rids);
 
-    $edit = array();
+    $edit = [];
     $edit[$rid . '[administer taxonomy]'] = FALSE;
     $this->drupalPostForm('admin/people/permissions', $edit, t('Save permissions'));
 
@@ -179,10 +179,10 @@ function testUserRoleUpdateSubtreesHashCacheClear() {
 
     $this->hash = $this->getSubtreesHash();
 
-    $rid = $this->drupalCreateRole(array('administer content types',));
+    $rid = $this->drupalCreateRole(['administer content types',]);
 
     // Assign the role to the user.
-    $this->drupalPostForm('user/' . $this->adminUser->id() . '/edit', array("roles[$rid]" => $rid), t('Save'));
+    $this->drupalPostForm('user/' . $this->adminUser->id() . '/edit', ["roles[$rid]" => $rid], t('Save'));
     $this->assertText(t('The changes have been saved.'));
 
     // Assert that the subtrees hash has been altered because the subtrees
@@ -214,7 +214,7 @@ function testNonCurrentUserAccountUpdates() {
 
     // adminUser2 will add a role to adminUser.
     $this->drupalLogin($this->adminUser2);
-    $rid = $this->drupalCreateRole(array('administer content types',));
+    $rid = $this->drupalCreateRole(['administer content types',]);
 
     // Get the subtree hash for adminUser2 to check later that it has not
     // changed. Request a new page to refresh the drupalSettings object.
@@ -223,7 +223,7 @@ function testNonCurrentUserAccountUpdates() {
     $admin_user_2_hash = $this->getSubtreesHash();
 
     // Assign the role to the user.
-    $this->drupalPostForm('user/' . $admin_user_id . '/edit', array("roles[$rid]" => $rid), t('Save'));
+    $this->drupalPostForm('user/' . $admin_user_id . '/edit', ["roles[$rid]" => $rid], t('Save'));
     $this->assertText(t('The changes have been saved.'));
 
     // Log in adminUser and assert that the subtrees hash has changed.
@@ -246,7 +246,7 @@ function testNonCurrentUserAccountUpdates() {
   function testLocaleTranslationSubtreesHashCacheClear() {
     $admin_user = $this->adminUser;
     // User to translate and delete string.
-    $translate_user = $this->drupalCreateUser(array('translate interface', 'access administration pages'));
+    $translate_user = $this->drupalCreateUser(['translate interface', 'access administration pages']);
 
     // Create a new language with the langcode 'xx'.
     $langcode = 'xx';
@@ -257,14 +257,14 @@ function testLocaleTranslationSubtreesHashCacheClear() {
 
     // Add custom language.
     $this->drupalLogin($admin_user);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
-    t($name, array(), array('langcode' => $langcode));
+    t($name, [], ['langcode' => $langcode]);
     // Reset locale cache.
     $this->container->get('string_translation')->reset();
     $this->assertRaw('"edit-languages-' . $langcode . '-weight"', 'Language code found.');
@@ -285,11 +285,11 @@ function testLocaleTranslationSubtreesHashCacheClear() {
     // should create a new menu hash if the toolbar subtrees cache is correctly
     // invalidated.
     $this->drupalLogin($translate_user);
-    $search = array(
+    $search = [
       'string' => 'Search and metadata',
       'langcode' => $langcode,
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     $this->assertNoText(t('No strings available'));
     $this->assertText($name, 'Search found the string as untranslated.');
@@ -298,9 +298,9 @@ function testLocaleTranslationSubtreesHashCacheClear() {
     // Translate the string to a random string.
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $translation,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
     $this->assertText(t('The strings have been saved.'), 'The strings have been saved.');
     $this->assertUrl(\Drupal::url('locale.translate_page', [], ['absolute' => TRUE]), [], 'Correct page redirection.');
@@ -350,7 +350,7 @@ function testLanguageSwitching() {
     $this->rebuildContainer();
 
     // Get a page with the new language langcode in the URL.
-    $this->drupalGet('test-page', array('language' => $language));
+    $this->drupalGet('test-page', ['language' => $language]);
     // Assert different hash.
     $new_subtree_hash = $this->getSubtreesHash();
 
diff --git a/core/modules/toolbar/src/Tests/ToolbarMenuTranslationTest.php b/core/modules/toolbar/src/Tests/ToolbarMenuTranslationTest.php
index 8fa2bed56567d3f6d1bbdba07083fd2238817070..a98dacfcd4f9fba886b36ed4618effaadf5501d6 100644
--- a/core/modules/toolbar/src/Tests/ToolbarMenuTranslationTest.php
+++ b/core/modules/toolbar/src/Tests/ToolbarMenuTranslationTest.php
@@ -23,13 +23,13 @@ class ToolbarMenuTranslationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('toolbar', 'toolbar_test', 'locale', 'locale_test');
+  public static $modules = ['toolbar', 'toolbar_test', 'locale', 'locale_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create an administrative user and log it in.
-    $this->adminUser = $this->drupalCreateUser(array('access toolbar', 'translate interface', 'administer languages', 'access administration pages'));
+    $this->adminUser = $this->drupalCreateUser(['access toolbar', 'translate interface', 'administer languages', 'access administration pages']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -50,11 +50,11 @@ function testToolbarClasses() {
     $this->drupalGet($langcode . '/admin/structure');
 
     // Search for the menu item.
-    $search = array(
+    $search = [
       'string' => $menu_item,
       'langcode' => $langcode,
       'translation' => 'untranslated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     // Make sure will be able to translate the menu item.
     $this->assertNoText('No strings available.', 'Search found the menu item as untranslated.');
@@ -67,17 +67,17 @@ function testToolbarClasses() {
     $menu_item_translated = $this->randomMachineName();
     $textarea = current($this->xpath('//textarea'));
     $lid = (string) $textarea[0]['name'];
-    $edit = array(
+    $edit = [
       $lid => $menu_item_translated,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $edit, t('Save translations'));
 
     // Search for the translated menu item.
-    $search = array(
+    $search = [
       'string' => $menu_item,
       'langcode' => $langcode,
       'translation' => 'translated',
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/translate', $search, t('Filter'));
     // Make sure the menu item string was translated.
     $this->assertText($menu_item_translated, 'Search found the menu item as translated: ' . $menu_item_translated . '.');
diff --git a/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module b/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
index 4a82ca7cb2e9735bd84299d10f37075d1a07be7a..323af166c6c80551498b947542fd7ab281ee6f95 100644
--- a/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
+++ b/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
@@ -12,38 +12,38 @@
  */
 function toolbar_test_toolbar() {
 
-  $items['testing'] = array(
+  $items['testing'] = [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'link',
       '#title' => t('Test tab'),
       '#url' => Url::fromRoute('<front>'),
-      '#options' => array(
-        'attributes' => array(
+      '#options' => [
+        'attributes' => [
           'id' => 'toolbar-tab-testing',
           'title' => t('Test tab'),
-        ),
-      ),
-    ),
-    'tray' => array(
+        ],
+      ],
+    ],
+    'tray' => [
       '#heading' => t('Test tray'),
-      '#wrapper_attributes' => array(
+      '#wrapper_attributes' => [
         'id' => 'toolbar-tray-testing',
-      ),
-      'content' => array(
+      ],
+      'content' => [
         '#theme' => 'item_list',
-        '#items' => array(
-          \Drupal::l(t('link 1'), new Url('<front>', [], array('attributes' => array('title' => 'Test link 1 title')))),
-          \Drupal::l(t('link 2'), new Url('<front>', [], array('attributes' => array('title' => 'Test link 2 title')))),
-          \Drupal::l(t('link 3'), new Url('<front>', [], array('attributes' => array('title' => 'Test link 3 title')))),
-        ),
-        '#attributes' => array(
-          'class' => array('toolbar-menu'),
-        ),
-      ),
-    ),
+        '#items' => [
+          \Drupal::l(t('link 1'), new Url('<front>', [], ['attributes' => ['title' => 'Test link 1 title']])),
+          \Drupal::l(t('link 2'), new Url('<front>', [], ['attributes' => ['title' => 'Test link 2 title']])),
+          \Drupal::l(t('link 3'), new Url('<front>', [], ['attributes' => ['title' => 'Test link 3 title']])),
+        ],
+        '#attributes' => [
+          'class' => ['toolbar-menu'],
+        ],
+      ],
+    ],
     '#weight' => 50,
-  );
+  ];
 
   return $items;
 }
diff --git a/core/modules/toolbar/tests/src/Functional/ToolbarHookToolbarTest.php b/core/modules/toolbar/tests/src/Functional/ToolbarHookToolbarTest.php
index 1bf6e82c5b57dabdc3f69c6d167201b5f1639d22..6369946fc9d29048e090eea436feecea48311045 100644
--- a/core/modules/toolbar/tests/src/Functional/ToolbarHookToolbarTest.php
+++ b/core/modules/toolbar/tests/src/Functional/ToolbarHookToolbarTest.php
@@ -23,13 +23,13 @@ class ToolbarHookToolbarTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('toolbar', 'toolbar_test', 'test_page_test');
+  public static $modules = ['toolbar', 'toolbar_test', 'test_page_test'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create an administrative user and log it in.
-    $this->adminUser = $this->drupalCreateUser(array('access toolbar'));
+    $this->adminUser = $this->drupalCreateUser(['access toolbar']);
     $this->drupalLogin($this->adminUser);
   }
 
diff --git a/core/modules/toolbar/toolbar.api.php b/core/modules/toolbar/toolbar.api.php
index b2d04091b9969ddba9aa05f88ff6bf9d1955c4d7..b6230827441dc995b5b57c67c5cd6d5f6ebffbf3 100644
--- a/core/modules/toolbar/toolbar.api.php
+++ b/core/modules/toolbar/toolbar.api.php
@@ -45,45 +45,45 @@
  * @ingroup toolbar_tabs
  */
 function hook_toolbar() {
-  $items = array();
+  $items = [];
 
   // Add a search field to the toolbar. The search field employs no toolbar
   // module theming functions.
-  $items['global_search'] = array(
+  $items['global_search'] = [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'search',
-      '#attributes' => array(
+      '#attributes' => [
         'placeholder' => t('Search the site'),
-        'class' => array('search-global'),
-      ),
-    ),
+        'class' => ['search-global'],
+      ],
+    ],
     '#weight' => 200,
     // Custom CSS, JS or a library can be associated with the toolbar item.
-    '#attached' => array(
-      'library' => array(
+    '#attached' => [
+      'library' => [
         'search/global',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   // The 'Home' tab is a simple link, which is wrapped in markup associated
   // with a visual tab styling.
-  $items['home'] = array(
+  $items['home'] = [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'link',
       '#title' => t('Home'),
       '#url' => Url::fromRoute('<front>'),
-      '#options' => array(
-        'attributes' => array(
+      '#options' => [
+        'attributes' => [
           'title' => t('Home page'),
-          'class' => array('toolbar-icon', 'toolbar-icon-home'),
-        ),
-      ),
-    ),
+          'class' => ['toolbar-icon', 'toolbar-icon-home'],
+        ],
+      ],
+    ],
     '#weight' => -20,
-  );
+  ];
 
   // A tray may be associated with a tab.
   //
@@ -93,27 +93,27 @@ function hook_toolbar() {
   // The tray should contain a renderable array. An optional #heading property
   // can be passed. This text is written to a heading tag in the tray as a
   // landmark for accessibility.
-  $items['commerce'] = array(
+  $items['commerce'] = [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'link',
       '#title' => t('Shopping cart'),
       '#url' => Url::fromRoute('cart'),
-      '#options' => array(
-        'attributes' => array(
+      '#options' => [
+        'attributes' => [
           'title' => t('Shopping cart'),
-        ),
-      ),
-    ),
-    'tray' => array(
+        ],
+      ],
+    ],
+    'tray' => [
       '#heading' => t('Shopping cart actions'),
-      'shopping_cart' => array(
+      'shopping_cart' => [
         '#theme' => 'item_list',
-        '#items' => array( /* An item list renderable array */ ),
-      ),
-    ),
+        '#items' => [ /* An item list renderable array */ ],
+      ],
+    ],
     '#weight' => 150,
-  );
+  ];
 
   // The tray can be used to render arbitrary content.
   //
@@ -123,28 +123,28 @@ function hook_toolbar() {
   // If the default behavior and styling of a toolbar tray is not desired, one
   // can render content to the toolbar element and apply custom theming and
   // behaviors.
-  $items['user_messages'] = array(
+  $items['user_messages'] = [
     // Include the toolbar_tab_wrapper to style the link like a toolbar tab.
     // Exclude the theme wrapper if custom styling is desired.
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'link',
       '#theme' => 'user_message_toolbar_tab',
-      '#theme_wrappers' => array(),
+      '#theme_wrappers' => [],
       '#title' => t('Messages'),
       '#url' => Url::fromRoute('user.message'),
-      '#options' => array(
-        'attributes' => array(
+      '#options' => [
+        'attributes' => [
           'title' => t('Messages'),
-        ),
-      ),
-    ),
-    'tray' => array(
+        ],
+      ],
+    ],
+    'tray' => [
       '#heading' => t('User messages'),
-      'messages' => array(/* renderable content */),
-    ),
+      'messages' => [/* renderable content */],
+    ],
     '#weight' => 125,
-  );
+  ];
 
   return $items;
 }
diff --git a/core/modules/toolbar/toolbar.module b/core/modules/toolbar/toolbar.module
index 281f3abbbccc410a2254ddffff9c9c7bca46f968..4791f87f97847c9bb555ac950d360bb3b653e99a 100644
--- a/core/modules/toolbar/toolbar.module
+++ b/core/modules/toolbar/toolbar.module
@@ -20,7 +20,7 @@ function toolbar_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.toolbar':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Toolbar module provides a toolbar for site administrators, which displays tabs and trays provided by the Toolbar module itself and other modules. For more information, see the <a href=":toolbar_docs">online documentation for the Toolbar module</a>.', array(':toolbar_docs' => 'https://www.drupal.org/documentation/modules/toolbar')) . '</p>';
+      $output .= '<p>' . t('The Toolbar module provides a toolbar for site administrators, which displays tabs and trays provided by the Toolbar module itself and other modules. For more information, see the <a href=":toolbar_docs">online documentation for the Toolbar module</a>.', [':toolbar_docs' => 'https://www.drupal.org/documentation/modules/toolbar']) . '</p>';
       $output .= '<h4>' . t('Terminology') . '</h4>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Tabs') . '</dt>';
@@ -36,13 +36,13 @@ function toolbar_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function toolbar_theme($existing, $type, $theme, $path) {
-  $items['toolbar'] = array(
+  $items['toolbar'] = [
     'render element' => 'element',
-  );
-  $items['menu__toolbar'] = array(
+  ];
+  $items['menu__toolbar'] = [
     'base hook' => 'menu',
-    'variables' => array('items' => array(), 'attributes' => array()),
-  );
+    'variables' => ['items' => [], 'attributes' => []],
+  ];
 
   return $items;
 }
@@ -53,14 +53,14 @@ function toolbar_theme($existing, $type, $theme, $path) {
  * Add admin toolbar to the top of the page automatically.
  */
 function toolbar_page_top(array &$page_top) {
-  $page_top['toolbar'] = array(
+  $page_top['toolbar'] = [
     '#type' => 'toolbar',
     '#access' => \Drupal::currentUser()->hasPermission('access toolbar'),
     '#cache' => [
       'keys' => ['toolbar'],
       'contexts' => ['user.permissions'],
     ],
-  );
+  ];
 }
 
 /**
@@ -83,9 +83,9 @@ function template_preprocess_toolbar(&$variables) {
 
   // Prepare the trays and tabs for each toolbar item as well as the remainder
   // variable that will hold any non-tray, non-tab elements.
-  $variables['trays'] = array();
-  $variables['tabs'] = array();
-  $variables['remainder'] = array();
+  $variables['trays'] = [];
+  $variables['tabs'] = [];
+  $variables['remainder'] = [];
   foreach (Element::children($element) as $key) {
     // Early rendering to collect the wrapper attributes from
     // ToolbarItem elements.
@@ -94,14 +94,14 @@ function template_preprocess_toolbar(&$variables) {
     }
     // Add the tray.
     if (isset($element[$key]['tray'])) {
-      $attributes = array();
+      $attributes = [];
       if (!empty($element[$key]['tray']['#wrapper_attributes'])) {
         $attributes = $element[$key]['tray']['#wrapper_attributes'];
       }
-      $variables['trays'][$key] = array(
+      $variables['trays'][$key] = [
         'links' => $element[$key]['tray'],
         'attributes' => new Attribute($attributes),
-      );
+      ];
       if (array_key_exists('#heading', $element[$key]['tray'])) {
         $variables['trays'][$key]['label'] = $element[$key]['tray']['#heading'];
       }
@@ -109,22 +109,22 @@ function template_preprocess_toolbar(&$variables) {
 
     // Add the tab.
     if (isset($element[$key]['tab'])) {
-      $attributes = array();
+      $attributes = [];
       // Pass the wrapper attributes along.
       if (!empty($element[$key]['#wrapper_attributes'])) {
         $attributes = $element[$key]['#wrapper_attributes'];
       }
 
-      $variables['tabs'][$key] = array(
+      $variables['tabs'][$key] = [
         'link' => $element[$key]['tab'],
         'attributes' => new Attribute($attributes),
-      );
+      ];
     }
 
     // Add other non-tray, non-tab child elements to the remainder variable for
     // later rendering.
     foreach (Element::children($element[$key]) as $child_key) {
-      if (!in_array($child_key, array('tray', 'tab'))) {
+      if (!in_array($child_key, ['tray', 'tab'])) {
         $variables['remainder'][$key][$child_key] = $element[$key][$child_key];
       }
     }
@@ -136,28 +136,28 @@ function template_preprocess_toolbar(&$variables) {
  */
 function toolbar_toolbar() {
   // The 'Home' tab is a simple link, with no corresponding tray.
-  $items['home'] = array(
+  $items['home'] = [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'link',
       '#title' => t('Back to site'),
       '#url' => Url::fromRoute('<front>'),
-      '#attributes' => array(
+      '#attributes' => [
         'title' => t('Return to site content'),
-        'class' => array('toolbar-icon', 'toolbar-icon-escape-admin'),
+        'class' => ['toolbar-icon', 'toolbar-icon-escape-admin'],
         'data-toolbar-escape-admin' => TRUE,
-      ),
-    ),
-    '#wrapper_attributes' => array(
-      'class' => array('hidden', 'home-toolbar-tab'),
-    ),
-    '#attached' => array(
-      'library' => array(
+      ],
+    ],
+    '#wrapper_attributes' => [
+      'class' => ['hidden', 'home-toolbar-tab'],
+    ],
+    '#attached' => [
+      'library' => [
         'toolbar/toolbar.escapeAdmin',
-      ),
-    ),
+      ],
+    ],
     '#weight' => -20,
-  );
+  ];
 
   // To conserve bandwidth, we only include the top-level links in the HTML.
   // The subtrees are fetched through a JSONP script that is generated at the
@@ -171,38 +171,38 @@ function toolbar_toolbar() {
 
   // The administration element has a link that is themed to correspond to
   // a toolbar tray. The tray contains the full administrative menu of the site.
-  $items['administration'] = array(
+  $items['administration'] = [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'link',
       '#title' => t('Manage'),
       '#url' => Url::fromRoute('system.admin'),
-      '#attributes' => array(
+      '#attributes' => [
         'title' => t('Admin menu'),
-        'class' => array('toolbar-icon', 'toolbar-icon-menu'),
+        'class' => ['toolbar-icon', 'toolbar-icon-menu'],
         // A data attribute that indicates to the client to defer loading of
         // the admin menu subtrees until this tab is activated. Admin menu
         // subtrees will not render to the DOM if this attribute is removed.
         // The value of the attribute is intentionally left blank. Only the
         // presence of the attribute is necessary.
         'data-drupal-subtrees' => '',
-      ),
-    ),
-    'tray' => array(
+      ],
+    ],
+    'tray' => [
       '#heading' => t('Administration menu'),
       '#attached' => $subtrees_attached,
-      'toolbar_administration' => array(
-        '#pre_render' => array(
+      'toolbar_administration' => [
+        '#pre_render' => [
           'toolbar_prerender_toolbar_administration_tray',
-        ),
+        ],
         '#type' => 'container',
-        '#attributes' => array(
-          'class' => array('toolbar-menu-administration'),
-        ),
-      ),
-    ),
+        '#attributes' => [
+          'class' => ['toolbar-menu-administration'],
+        ],
+      ],
+    ],
     '#weight' => -15,
-  );
+  ];
   $hash_cacheability->applyTo($items['administration']);
 
   return $items;
@@ -228,11 +228,11 @@ function toolbar_prerender_toolbar_administration_tray(array $element) {
   $parameters->setMinDepth(2)->setMaxDepth(2)->onlyEnabledLinks();
   // @todo Make the menu configurable in https://www.drupal.org/node/1869638.
   $tree = $menu_tree->load('admin', $parameters);
-  $manipulators = array(
-    array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-    array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
-    array('callable' => 'toolbar_menu_navigation_links'),
-  );
+  $manipulators = [
+    ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+    ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+    ['callable' => 'toolbar_menu_navigation_links'],
+  ];
   $tree = $menu_tree->transform($tree, $manipulators);
   $element['administration_menu'] = $menu_tree->build($tree);
   return $element;
@@ -262,7 +262,7 @@ function toolbar_menu_navigation_links(array $tree) {
       $id = substr(Crypt::hashBase64($url->getUri()), 0, 16);
     }
     else {
-      $id = str_replace(array('.', '<', '>'), array('-', '', ''), $url->getRouteName());
+      $id = str_replace(['.', '<', '>'], ['-', '', ''], $url->getRouteName());
     }
 
     // Get the non-localized title to make the icon class.
@@ -270,7 +270,7 @@ function toolbar_menu_navigation_links(array $tree) {
 
     $element->options['attributes']['id'] = 'toolbar-link-' . $id;
     $element->options['attributes']['class'][] = 'toolbar-icon';
-    $element->options['attributes']['class'][] = 'toolbar-icon-' . strtolower(str_replace(array('.', ' ', '_'), array('-', '-', '-'), $definition['id']));
+    $element->options['attributes']['class'][] = 'toolbar-icon-' . strtolower(str_replace(['.', ' ', '_'], ['-', '-', '-'], $definition['id']));
     $element->options['attributes']['title'] = $link->getDescription();
   }
   return $tree;
@@ -310,13 +310,13 @@ function _toolbar_do_get_rendered_subtrees(array $data) {
   $parameters->setMinDepth(2)->setMaxDepth(4)->onlyEnabledLinks();
   // @todo Make the menu configurable in https://www.drupal.org/node/1869638.
   $tree = $menu_tree->load('admin', $parameters);
-  $manipulators = array(
-    array('callable' => 'menu.default_tree_manipulators:checkAccess'),
-    array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
-    array('callable' => 'toolbar_menu_navigation_links'),
-  );
+  $manipulators = [
+    ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+    ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+    ['callable' => 'toolbar_menu_navigation_links'],
+  ];
   $tree = $menu_tree->transform($tree, $manipulators);
-  $subtrees = array();
+  $subtrees = [];
   // Calculated the combined cacheability of all subtrees.
   $cacheability = new CacheableMetadata();
   foreach ($tree as $element) {
@@ -333,7 +333,7 @@ function _toolbar_do_get_rendered_subtrees(array $data) {
     // Many routes have dots as route name, while some special ones like <front>
     // have <> characters in them.
     $url = $link->getUrlObject();
-    $id = str_replace(array('.', '<', '>'), array('-', '', '' ), $url->isRouted() ? $url->getRouteName() : $url->getUri());
+    $id = str_replace(['.', '<', '>'], ['-', '', '' ], $url->isRouted() ? $url->getRouteName() : $url->getUri());
 
     $subtrees[$id] = $output;
   }
diff --git a/core/modules/tour/src/Entity/Tour.php b/core/modules/tour/src/Entity/Tour.php
index 290d3f8fb9fa87c2a914018549081d5baafdeda0..6f4038d5d11fcb2265c0c638b8254be47385c383 100644
--- a/core/modules/tour/src/Entity/Tour.php
+++ b/core/modules/tour/src/Entity/Tour.php
@@ -59,7 +59,7 @@ class Tour extends ConfigEntityBase implements TourInterface {
    *
    * @var array
    */
-  protected $routes = array();
+  protected $routes = [];
 
   /**
    * The routes on which this tour should be displayed, keyed by route id.
@@ -80,7 +80,7 @@ class Tour extends ConfigEntityBase implements TourInterface {
    *
    * @var array
    */
-  protected $tips = array();
+  protected $tips = [];
 
   /**
    * {@inheritdoc}
@@ -109,7 +109,7 @@ public function getTip($id) {
    * {@inheritdoc}
    */
   public function getTips() {
-    $tips = array();
+    $tips = [];
     foreach ($this->tips as $id => $tip) {
       $tips[] = $this->getTip($id);
     }
@@ -136,9 +136,9 @@ public function getModule() {
    */
   public function hasMatchingRoute($route_name, $route_params) {
     if (!isset($this->keyedRoutes)) {
-      $this->keyedRoutes = array();
+      $this->keyedRoutes = [];
       foreach ($this->getRoutes() as $route) {
-        $this->keyedRoutes[$route['route_name']] = isset($route['route_params']) ? $route['route_params'] : array();
+        $this->keyedRoutes[$route['route_name']] = isset($route['route_params']) ? $route['route_params'] : [];
       }
     }
     if (!isset($this->keyedRoutes[$route_name])) {
diff --git a/core/modules/tour/src/Plugin/tour/tip/TipPluginText.php b/core/modules/tour/src/Plugin/tour/tip/TipPluginText.php
index f7d279386ed54811e22fdf5c7072216d0cbb38c0..268741a83d9bc0df10b8581b86adee9055b69e6d 100644
--- a/core/modules/tour/src/Plugin/tour/tip/TipPluginText.php
+++ b/core/modules/tour/src/Plugin/tour/tip/TipPluginText.php
@@ -116,7 +116,7 @@ public function getAttributes() {
   public function getOutput() {
     $output = '<h2 class="tour-tip-label" id="tour-tip-' . $this->getAriaId() . '-label">' . Html::escape($this->getLabel()) . '</h2>';
     $output .= '<p class="tour-tip-body" id="tour-tip-' . $this->getAriaId() . '-contents">' . $this->token->replace($this->getBody()) . '</p>';
-    return array('#markup' => $output);
+    return ['#markup' => $output];
   }
 
 }
diff --git a/core/modules/tour/src/Tests/TourTest.php b/core/modules/tour/src/Tests/TourTest.php
index 78304c6e9570cd4545c8aefc3d0191a125dacb11..749e7c5a3eeb702523bb96ea45277ef6be6929fd 100644
--- a/core/modules/tour/src/Tests/TourTest.php
+++ b/core/modules/tour/src/Tests/TourTest.php
@@ -25,7 +25,7 @@ class TourTest extends TourTestBasic {
    * @var array
    *   A list of permissions.
    */
-  protected $permissions = array('access tour', 'administer languages');
+  protected $permissions = ['access tour', 'administer languages'];
 
   /**
    * Tour tip attributes to be tested. Keyed by the path.
@@ -33,9 +33,9 @@ class TourTest extends TourTestBasic {
    * @var array
    *   An array of tip attributes, keyed by path.
    */
-  protected $tips = array(
-    'tour-test-1' => array(),
-  );
+  protected $tips = [
+    'tour-test-1' => [],
+  ];
 
   /**
    * {@inheritdoc}
@@ -57,18 +57,18 @@ public function testTourFunctionality() {
     $this->drupalGet('tour-test-1');
 
     // Test the TourTestBase class assertTourTips() method.
-    $tips = array();
-    $tips[] = array('data-id' => 'tour-test-1');
-    $tips[] = array('data-class' => 'tour-test-5');
+    $tips = [];
+    $tips[] = ['data-id' => 'tour-test-1'];
+    $tips[] = ['data-class' => 'tour-test-5'];
     $this->assertTourTips($tips);
     $this->assertTourTips();
 
-    $elements = $this->xpath('//li[@data-id=:data_id and @class=:classes and ./p//a[@href=:href and contains(., :text)]]', array(
+    $elements = $this->xpath('//li[@data-id=:data_id and @class=:classes and ./p//a[@href=:href and contains(., :text)]]', [
       ':classes' => 'tip-module-tour-test tip-type-text tip-tour-test-1',
       ':data_id' => 'tour-test-1',
       ':href' => \Drupal::url('<front>', [], ['absolute' => TRUE]),
       ':text' => 'Drupal',
-    ));
+    ]);
     $this->assertEqual(count($elements), 1, 'Found Token replacement.');
 
     $elements = $this->cssSelect("li[data-id=tour-test-1] h2:contains('The first tip')");
@@ -104,43 +104,43 @@ public function testTourFunctionality() {
     $this->assertNotEqual(count($elements), 1, 'Did not find English variant of tip 1.');
 
     // Programmatically create a tour for use through the remainder of the test.
-    $tour = Tour::create(array(
+    $tour = Tour::create([
       'id' => 'tour-entity-create-test-en',
       'label' => 'Tour test english',
       'langcode' => 'en',
       'module' => 'system',
-      'routes' => array(
-        array('route_name' => 'tour_test.1'),
-      ),
-      'tips' => array(
-        'tour-test-1' => array(
+      'routes' => [
+        ['route_name' => 'tour_test.1'],
+      ],
+      'tips' => [
+        'tour-test-1' => [
           'id' => 'tour-code-test-1',
           'plugin' => 'text',
           'label' => 'The rain in spain',
           'body' => 'Falls mostly on the plain.',
           'weight' => '100',
-          'attributes' => array(
+          'attributes' => [
             'data-id' => 'tour-code-test-1',
-          ),
-        ),
-        'tour-code-test-2' => array(
+          ],
+        ],
+        'tour-code-test-2' => [
           'id' => 'tour-code-test-2',
           'plugin' => 'image',
           'label' => 'The awesome image',
           'url' => 'http://local/image.png',
           'weight' => 1,
-          'attributes' => array(
+          'attributes' => [
             'data-id' => 'tour-code-test-2'
-          ),
-        ),
-      ),
-    ));
+          ],
+        ],
+      ],
+    ]);
     $tour->save();
 
     // Ensure that a tour entity has the expected dependencies based on plugin
     // providers and the module named in the configuration entity.
     $dependencies = $tour->calculateDependencies()->getDependencies();
-    $this->assertEqual($dependencies['module'], array('system', 'tour_test'));
+    $this->assertEqual($dependencies['module'], ['system', 'tour_test']);
 
     $this->drupalGet('tour-test-1');
 
@@ -167,21 +167,21 @@ public function testTourFunctionality() {
     // Navigate to tour-test-3 and verify the tour_test_1 tip is found with
     // appropriate classes.
     $this->drupalGet('tour-test-3/foo');
-    $elements = $this->xpath('//li[@data-id=:data_id and @class=:classes and ./h2[contains(., :text)]]', array(
+    $elements = $this->xpath('//li[@data-id=:data_id and @class=:classes and ./h2[contains(., :text)]]', [
       ':classes' => 'tip-module-tour-test tip-type-text tip-tour-test-1',
       ':data_id' => 'tour-test-1',
       ':text' => 'The first tip',
-    ));
+    ]);
     $this->assertEqual(count($elements), 1, 'Found English variant of tip 1.');
 
     // Navigate to tour-test-3 and verify the tour_test_1 tip is not found with
     // appropriate classes.
     $this->drupalGet('tour-test-3/bar');
-    $elements = $this->xpath('//li[@data-id=:data_id and @class=:classes and ./h2[contains(., :text)]]', array(
+    $elements = $this->xpath('//li[@data-id=:data_id and @class=:classes and ./h2[contains(., :text)]]', [
       ':classes' => 'tip-module-tour-test tip-type-text tip-tour-test-1',
       ':data_id' => 'tour-test-1',
       ':text' => 'The first tip',
-    ));
+    ]);
     $this->assertEqual(count($elements), 0, 'Did not find English variant of tip 1.');
   }
 
diff --git a/core/modules/tour/src/Tests/TourTestBase.php b/core/modules/tour/src/Tests/TourTestBase.php
index 8383c99d1f3caa2b809b6dd3d0a215a79f3501c4..198051d3702fe83c97a1a5a371ee9b79539fb13f 100644
--- a/core/modules/tour/src/Tests/TourTestBase.php
+++ b/core/modules/tour/src/Tests/TourTestBase.php
@@ -29,7 +29,7 @@ abstract class TourTestBase extends WebTestBase {
    * $this->assertTourTips($tips);
    * @endcode
    */
-  public function assertTourTips($tips = array()) {
+  public function assertTourTips($tips = []) {
     // Get the rendered tips and their data-id and data-class attributes.
     if (empty($tips)) {
       // Tips are rendered as <li> elements inside <ol id="tour">.
@@ -51,11 +51,11 @@ public function assertTourTips($tips = array()) {
       foreach ($tips as $tip) {
         if (!empty($tip['data-id'])) {
           $elements = \PHPUnit_Util_XML::cssSelect('#' . $tip['data-id'], TRUE, $this->content, TRUE);
-          $this->assertTrue(!empty($elements) && count($elements) === 1, format_string('Found corresponding page element for tour tip with id #%data-id', array('%data-id' => $tip['data-id'])));
+          $this->assertTrue(!empty($elements) && count($elements) === 1, format_string('Found corresponding page element for tour tip with id #%data-id', ['%data-id' => $tip['data-id']]));
         }
         elseif (!empty($tip['data-class'])) {
           $elements = \PHPUnit_Util_XML::cssSelect('.' . $tip['data-class'], TRUE, $this->content, TRUE);
-          $this->assertFalse(empty($elements), format_string('Found corresponding page element for tour tip with class .%data-class', array('%data-class' => $tip['data-class'])));
+          $this->assertFalse(empty($elements), format_string('Found corresponding page element for tour tip with class .%data-class', ['%data-class' => $tip['data-class']]));
         }
         else {
           // It's a modal.
@@ -63,7 +63,7 @@ public function assertTourTips($tips = array()) {
         }
         $total++;
       }
-      $this->pass(format_string('Total %total Tips tested of which %modals modal(s).', array('%total' => $total, '%modals' => $modals)));
+      $this->pass(format_string('Total %total Tips tested of which %modals modal(s).', ['%total' => $total, '%modals' => $modals]));
     }
   }
 
diff --git a/core/modules/tour/src/Tests/TourTestBasic.php b/core/modules/tour/src/Tests/TourTestBasic.php
index e79eb2b451ba1dc767ea8955e510077f47872aa9..1db8bc5c6aa20bb61bcbb610289f0d695252f3c4 100644
--- a/core/modules/tour/src/Tests/TourTestBasic.php
+++ b/core/modules/tour/src/Tests/TourTestBasic.php
@@ -22,7 +22,7 @@ abstract class TourTestBasic extends TourTestBase {
    * );
    * @endcode
    */
-  protected $tips = array();
+  protected $tips = [];
 
   /**
    * An admin user with administrative permissions for tour.
@@ -37,14 +37,14 @@ abstract class TourTestBasic extends TourTestBase {
    * @var array
    *   A list of permissions.
    */
-  protected $permissions = array('access tour');
+  protected $permissions = ['access tour'];
 
   protected function setUp() {
     parent::setUp();
 
     // Make sure we are using distinct default and administrative themes for
     // the duration of these tests.
-    $this->container->get('theme_handler')->install(array('bartik', 'seven'));
+    $this->container->get('theme_handler')->install(['bartik', 'seven']);
     $this->config('system.theme')
       ->set('default', 'bartik')
       ->set('admin', 'seven')
diff --git a/core/modules/tour/src/TourViewBuilder.php b/core/modules/tour/src/TourViewBuilder.php
index 34172de0675f9225042d0f728d2284b1a5f73cc9..a9bfe5a5fdcf2582db7c1b013486ca977ff937eb 100644
--- a/core/modules/tour/src/TourViewBuilder.php
+++ b/core/modules/tour/src/TourViewBuilder.php
@@ -13,35 +13,35 @@ class TourViewBuilder extends EntityViewBuilder {
   /**
    * {@inheritdoc}
    */
-  public function viewMultiple(array $entities = array(), $view_mode = 'full', $langcode = NULL) {
+  public function viewMultiple(array $entities = [], $view_mode = 'full', $langcode = NULL) {
     /** @var \Drupal\tour\TourInterface[] $entities */
-    $build = array();
+    $build = [];
     foreach ($entities as $entity_id => $entity) {
       $tips = $entity->getTips();
       $count = count($tips);
-      $list_items = array();
+      $list_items = [];
       foreach ($tips as $index => $tip) {
         if ($output = $tip->getOutput()) {
-          $attributes = array(
-            'class' => array(
+          $attributes = [
+            'class' => [
               'tip-module-' . Html::cleanCssIdentifier($entity->getModule()),
               'tip-type-' . Html::cleanCssIdentifier($tip->getPluginId()),
               'tip-' . Html::cleanCssIdentifier($tip->id()),
-            ),
-          );
-          $list_items[] = array(
+            ],
+          ];
+          $list_items[] = [
             'output' => $output,
-            'counter' => array(
+            'counter' => [
               '#type' => 'container',
-              '#attributes' => array(
-                'class' => array(
+              '#attributes' => [
+                'class' => [
                   'tour-progress',
-                ),
-              ),
-              '#children' => t('@tour_item of @total', array('@tour_item' => $index + 1, '@total' => $count)),
-            ),
+                ],
+              ],
+              '#children' => t('@tour_item of @total', ['@tour_item' => $index + 1, '@total' => $count]),
+            ],
             '#wrapper_attributes' => $tip->getAttributes() + $attributes,
-          );
+          ];
         }
       }
       // If there is at least one tour item, build the tour.
@@ -49,20 +49,20 @@ public function viewMultiple(array $entities = array(), $view_mode = 'full', $la
         end($list_items);
         $key = key($list_items);
         $list_items[$key]['#wrapper_attributes']['data-text'] = t('End tour');
-        $build[$entity_id] = array(
+        $build[$entity_id] = [
           '#theme' => 'item_list',
           '#items' => $list_items,
           '#list_type' => 'ol',
-          '#attributes' => array(
+          '#attributes' => [
             'id' => 'tour',
-            'class' => array(
+            'class' => [
               'hidden',
-            ),
-          ),
+            ],
+          ],
           '#cache' => [
             'tags' => $entity->getCacheTags(),
           ],
-        );
+        ];
       }
     }
     // If at least one tour was built, attach the tour library.
diff --git a/core/modules/tour/tests/src/Functional/TourCacheTagsTest.php b/core/modules/tour/tests/src/Functional/TourCacheTagsTest.php
index c7048fb2a6981daeaace7f6f727240e66bae6355..ff2e9e586e850eff8093d47418593d03df6e7ea3 100644
--- a/core/modules/tour/tests/src/Functional/TourCacheTagsTest.php
+++ b/core/modules/tour/tests/src/Functional/TourCacheTagsTest.php
@@ -18,7 +18,7 @@ class TourCacheTagsTest extends PageCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('tour', 'tour_test');
+  public static $modules = ['tour', 'tour_test'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/tour/tests/src/Kernel/TourPluginTest.php b/core/modules/tour/tests/src/Kernel/TourPluginTest.php
index 9278e2e548eaf20fc060f0dcd1d7722382abd85d..ce47467df714971194cbece3359acd4ae32794f1 100644
--- a/core/modules/tour/tests/src/Kernel/TourPluginTest.php
+++ b/core/modules/tour/tests/src/Kernel/TourPluginTest.php
@@ -16,7 +16,7 @@ class TourPluginTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('tour');
+  public static $modules = ['tour'];
 
   /**
    * Stores the tour plugin manager.
@@ -28,7 +28,7 @@ class TourPluginTest extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->installConfig(array('tour'));
+    $this->installConfig(['tour']);
     $this->pluginManager = $this->container->get('plugin.manager.tour.tip');
   }
 
diff --git a/core/modules/tour/tests/src/Unit/Entity/TourTest.php b/core/modules/tour/tests/src/Unit/Entity/TourTest.php
index 2c71aa9650c6fb83a60651c1b957974adcaffa31..08944eef2a10e52b9a1e5366d707d1ea62b97a9f 100644
--- a/core/modules/tour/tests/src/Unit/Entity/TourTest.php
+++ b/core/modules/tour/tests/src/Unit/Entity/TourTest.php
@@ -29,7 +29,7 @@ class TourTest extends UnitTestCase {
   public function testHasMatchingRoute($routes, $route_name, $route_params, $result) {
     $tour = $this->getMockBuilder('\Drupal\tour\Entity\Tour')
       ->disableOriginalConstructor()
-      ->setMethods(array('getRoutes'))
+      ->setMethods(['getRoutes'])
       ->getMock();
 
     $tour->expects($this->any())
@@ -45,94 +45,94 @@ public function testHasMatchingRoute($routes, $route_name, $route_params, $resul
    * Provides sample routes for testing.
    */
   public function routeProvider() {
-    return array(
+    return [
       // Simple match.
-      array(
-        array(
-          array('route_name' => 'some.route'),
-        ),
+      [
+        [
+          ['route_name' => 'some.route'],
+        ],
         'some.route',
-        array(),
+        [],
         TRUE,
-      ),
+      ],
       // Simple non-match.
-      array(
-        array(
-          array('route_name' => 'another.route'),
-        ),
+      [
+        [
+          ['route_name' => 'another.route'],
+        ],
         'some.route',
-        array(),
+        [],
         FALSE,
-      ),
+      ],
       // Empty params.
-      array(
-        array(
-          array(
+      [
+        [
+          [
             'route_name' => 'some.route',
-            'route_params' => array('foo' => 'bar'),
-          ),
-        ),
+            'route_params' => ['foo' => 'bar'],
+          ],
+        ],
         'some.route',
-        array(),
+        [],
         FALSE,
-      ),
+      ],
       // Match on params.
-      array(
-        array(
-          array(
+      [
+        [
+          [
             'route_name' => 'some.route',
-            'route_params' => array('foo' => 'bar'),
-          ),
-        ),
+            'route_params' => ['foo' => 'bar'],
+          ],
+        ],
         'some.route',
-        array('foo' => 'bar'),
+        ['foo' => 'bar'],
         TRUE,
-      ),
+      ],
       // Non-matching params.
-      array(
-        array(
-          array(
+      [
+        [
+          [
             'route_name' => 'some.route',
-            'route_params' => array('foo' => 'bar'),
-          ),
-        ),
+            'route_params' => ['foo' => 'bar'],
+          ],
+        ],
         'some.route',
-        array('bar' => 'foo'),
+        ['bar' => 'foo'],
         FALSE,
-      ),
+      ],
       // One matching, one not.
-      array(
-        array(
-          array(
+      [
+        [
+          [
             'route_name' => 'some.route',
-            'route_params' => array('foo' => 'bar'),
-          ),
-          array(
+            'route_params' => ['foo' => 'bar'],
+          ],
+          [
             'route_name' => 'some.route',
-            'route_params' => array('bar' => 'foo'),
-          ),
-        ),
+            'route_params' => ['bar' => 'foo'],
+          ],
+        ],
         'some.route',
-        array('bar' => 'foo'),
+        ['bar' => 'foo'],
         TRUE,
-      ),
+      ],
       // One matching, one not.
-      array(
-        array(
-          array(
+      [
+        [
+          [
             'route_name' => 'some.route',
-            'route_params' => array('foo' => 'bar'),
-          ),
-          array(
+            'route_params' => ['foo' => 'bar'],
+          ],
+          [
             'route_name' => 'some.route',
-            'route_params' => array('foo' => 'baz'),
-          ),
-        ),
+            'route_params' => ['foo' => 'baz'],
+          ],
+        ],
         'some.route',
-        array('foo' => 'baz'),
+        ['foo' => 'baz'],
         TRUE,
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/tour/tests/tour_test/src/Controller/TourTestController.php b/core/modules/tour/tests/tour_test/src/Controller/TourTestController.php
index 87b817df7bf7bac854c0a7dad39553202534b5fe..56505aa0a0fe03e88a87184741b5e4d04d829ab2 100644
--- a/core/modules/tour/tests/tour_test/src/Controller/TourTestController.php
+++ b/core/modules/tour/tests/tour_test/src/Controller/TourTestController.php
@@ -18,56 +18,56 @@ class TourTestController {
    *   Array of markup.
    */
   public function tourTest1($locale = 'foo') {
-    return array(
-      'tip-1' => array(
+    return [
+      'tip-1' => [
         '#type' => 'container',
-        '#attributes' => array(
+        '#attributes' => [
           'id' => 'tour-test-1',
-        ),
+        ],
         '#children' => t('Where does the rain in Spain fail?'),
-      ),
-      'tip-3' => array(
+      ],
+      'tip-3' => [
         '#type' => 'container',
-        '#attributes' => array(
+        '#attributes' => [
           'id' => 'tour-test-3',
-        ),
+        ],
         '#children' => t('Tip created now?'),
-      ),
-      'tip-4' => array(
+      ],
+      'tip-4' => [
         '#type' => 'container',
-        '#attributes' => array(
+        '#attributes' => [
           'id' => 'tour-test-4',
-        ),
+        ],
         '#children' => t('Tip created later?'),
-      ),
-      'tip-5' => array(
+      ],
+      'tip-5' => [
         '#type' => 'container',
-        '#attributes' => array(
-          'class' => array('tour-test-5'),
-        ),
+        '#attributes' => [
+          'class' => ['tour-test-5'],
+        ],
         '#children' => t('Tip created later?'),
-      ),
-      'code-tip-1' => array(
+      ],
+      'code-tip-1' => [
         '#type' => 'container',
-        '#attributes' => array(
+        '#attributes' => [
           'id' => 'tour-code-test-1',
-        ),
+        ],
         '#children' => t('Tip created now?'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
    * Outputs some content for testing tours.
    */
   public function tourTest2() {
-    return array(
+    return [
       '#type' => 'container',
-      '#attributes' => array(
+      '#attributes' => [
         'id' => 'tour-test-2',
-      ),
+      ],
       '#children' => t('Pangram example'),
-    );
+    ];
 
   }
 
diff --git a/core/modules/tour/tour.module b/core/modules/tour/tour.module
index e456361f876183a109cfefb2f26c56dc97431053..1de83992bbf4db285dd9171bbc7ca97bf7586814 100644
--- a/core/modules/tour/tour.module
+++ b/core/modules/tour/tour.module
@@ -16,13 +16,13 @@ function tour_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.tour':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t("The Tour module provides users with guided tours of the site interface. Each tour consists of several tips that highlight elements of the user interface, guide the user through a workflow, or explain key concepts of the website. For more information, see the <a href=':tour'>online documentation for the Tour module</a>.", array(':tour' => 'https://www.drupal.org/documentation/modules/tour')) . '</p>';
+      $output .= '<p>' . t("The Tour module provides users with guided tours of the site interface. Each tour consists of several tips that highlight elements of the user interface, guide the user through a workflow, or explain key concepts of the website. For more information, see the <a href=':tour'>online documentation for the Tour module</a>.", [':tour' => 'https://www.drupal.org/documentation/modules/tour']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Viewing tours') . '</dt>';
       $output .= '<dd>' . t("If a tour is available on a page, a <em>Tour</em> button will be visible in the toolbar. If you click this button the first tip of the tour will appear. The tour continues after clicking the <em>Next</em> button in the tip. To see a tour users must have the permission <em>Access tour</em> and JavaScript must be enabled in the browser") . '</dd>';
       $output .= '<dt>' . t('Creating tours') . '</dt>';
-      $output .= '<dd>' . t("Tours can be written as YAML-documents with a text editor, or using the contributed <a href=':tour_ui'>Tour UI</a> module. For more information, see <a href=':doc_url'>the online documentation for writing tours</a>.", array(':doc_url' => 'https://www.drupal.org/developing/api/tour', ':tour_ui' => 'https://www.drupal.org/project/tour_ui')) . '</dd>';
+      $output .= '<dd>' . t("Tours can be written as YAML-documents with a text editor, or using the contributed <a href=':tour_ui'>Tour UI</a> module. For more information, see <a href=':doc_url'>the online documentation for writing tours</a>.", [':doc_url' => 'https://www.drupal.org/developing/api/tour', ':tour_ui' => 'https://www.drupal.org/project/tour_ui']) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
@@ -45,27 +45,27 @@ function tour_toolbar() {
     return $items;
   }
 
-  $items['tour'] += array(
+  $items['tour'] += [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'html_tag',
       '#tag' => 'button',
       '#value' => t('Tour'),
-      '#attributes' => array(
-        'class' => array('toolbar-icon', 'toolbar-icon-help'),
+      '#attributes' => [
+        'class' => ['toolbar-icon', 'toolbar-icon-help'],
         'aria-pressed' => 'false',
-      ),
-    ),
-    '#wrapper_attributes' => array(
-      'class' => array('tour-toolbar-tab', 'hidden'),
+      ],
+    ],
+    '#wrapper_attributes' => [
+      'class' => ['tour-toolbar-tab', 'hidden'],
       'id' => 'toolbar-tab-tour',
-    ),
-    '#attached' => array(
-      'library' => array(
+    ],
+    '#attached' => [
+      'library' => [
         'tour/tour',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   return $items;
 }
diff --git a/core/modules/tracker/src/Plugin/Menu/UserTrackerTab.php b/core/modules/tracker/src/Plugin/Menu/UserTrackerTab.php
index 1cd42177f92ea6b3ac0207a7cec117402b6a81b1..95264803f74208e011cfc720d49e339f9b5dea1d 100644
--- a/core/modules/tracker/src/Plugin/Menu/UserTrackerTab.php
+++ b/core/modules/tracker/src/Plugin/Menu/UserTrackerTab.php
@@ -37,7 +37,7 @@ protected function currentUser() {
    * {@inheritdoc}
    */
   public function getRouteParameters(RouteMatchInterface $route_match) {
-    return array('user' => $this->currentUser()->Id());
+    return ['user' => $this->currentUser()->Id()];
   }
 
 }
diff --git a/core/modules/tracker/src/Tests/TrackerTest.php b/core/modules/tracker/src/Tests/TrackerTest.php
index a927e891c7f22f063a77edd8aa648a839f68c7c2..2ac7cef9a0a9bc69385fe65b38bba755a953fcae 100644
--- a/core/modules/tracker/src/Tests/TrackerTest.php
+++ b/core/modules/tracker/src/Tests/TrackerTest.php
@@ -46,16 +46,16 @@ class TrackerTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
-    $permissions = array('access comments', 'create page content', 'post comments', 'skip comment approval');
+    $permissions = ['access comments', 'create page content', 'post comments', 'skip comment approval'];
     $this->user = $this->drupalCreateUser($permissions);
     $this->otherUser = $this->drupalCreateUser($permissions);
     $this->addDefaultCommentField('node', 'page');
-    user_role_grant_permissions(AccountInterface::ANONYMOUS_ROLE, array(
+    user_role_grant_permissions(AccountInterface::ANONYMOUS_ROLE, [
       'access content',
       'access user profiles',
-    ));
+    ]);
     $this->drupalPlaceBlock('local_tasks_block', ['id' => 'page_tabs_block']);
     $this->drupalPlaceBlock('local_actions_block', ['id' => 'page_actions_block']);
   }
@@ -66,14 +66,14 @@ protected function setUp() {
   function testTrackerAll() {
     $this->drupalLogin($this->user);
 
-    $unpublished = $this->drupalCreateNode(array(
+    $unpublished = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
       'status' => 0,
-    ));
-    $published = $this->drupalCreateNode(array(
+    ]);
+    $published = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
       'status' => 1,
-    ));
+    ]);
 
     $this->drupalGet('activity');
     $this->assertNoText($unpublished->label(), 'Unpublished node does not show up in the tracker listing.');
@@ -132,30 +132,30 @@ function testTrackerAll() {
   function testTrackerUser() {
     $this->drupalLogin($this->user);
 
-    $unpublished = $this->drupalCreateNode(array(
+    $unpublished = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
       'uid' => $this->user->id(),
       'status' => 0,
-    ));
-    $my_published = $this->drupalCreateNode(array(
+    ]);
+    $my_published = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
       'uid' => $this->user->id(),
       'status' => 1,
-    ));
-    $other_published_no_comment = $this->drupalCreateNode(array(
+    ]);
+    $other_published_no_comment = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
       'uid' => $this->otherUser->id(),
       'status' => 1,
-    ));
-    $other_published_my_comment = $this->drupalCreateNode(array(
+    ]);
+    $other_published_my_comment = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
       'uid' => $this->otherUser->id(),
       'status' => 1,
-    ));
-    $comment = array(
+    ]);
+    $comment = [
       'subject[0][value]' => $this->randomMachineName(),
       'comment_body[0][value]' => $this->randomMachineName(20),
-    );
+    ];
     $this->drupalPostForm('comment/reply/node/' . $other_published_my_comment->id() . '/comment', $comment, t('Save'));
 
     $this->drupalGet('user/' . $this->user->id() . '/activity');
@@ -197,12 +197,12 @@ function testTrackerUser() {
     $this->assertNoLink($unpublished->label());
     // Verify that title and tab title have been set correctly.
     $this->assertText('Activity', 'The user activity tab has the name "Activity".');
-    $this->assertTitle(t('@name | @site', array('@name' => $this->user->getUsername(), '@site' => $this->config('system.site')->get('name'))), 'The user tracker page has the correct page title.');
+    $this->assertTitle(t('@name | @site', ['@name' => $this->user->getUsername(), '@site' => $this->config('system.site')->get('name')]), 'The user tracker page has the correct page title.');
 
     // Verify that unpublished comments are removed from the tracker.
-    $admin_user = $this->drupalCreateUser(array('post comments', 'administer comments', 'access user profiles'));
+    $admin_user = $this->drupalCreateUser(['post comments', 'administer comments', 'access user profiles']);
     $this->drupalLogin($admin_user);
-    $this->drupalPostForm('comment/1/edit', array('status' => CommentInterface::NOT_PUBLISHED), t('Save'));
+    $this->drupalPostForm('comment/1/edit', ['status' => CommentInterface::NOT_PUBLISHED], t('Save'));
     $this->drupalGet('user/' . $this->user->id() . '/activity');
     $this->assertNoText($other_published_my_comment->label(), 'Unpublished comments are not counted on the tracker listing.');
 
@@ -227,9 +227,9 @@ function testTrackerHistoryMetadata() {
     $this->drupalLogin($this->user);
 
     // Create a page node.
-    $edit = array(
+    $edit = [
       'title' => $this->randomMachineName(8),
-    );
+    ];
     $node = $this->drupalCreateNode($edit);
 
     // Verify that the history metadata is present.
@@ -243,10 +243,10 @@ function testTrackerHistoryMetadata() {
     // Add a comment to the page, make sure it is created after the node by
     // sleeping for one second, to ensure the last comment timestamp is
     // different from before.
-    $comment = array(
+    $comment = [
       'subject[0][value]' => $this->randomMachineName(),
       'comment_body[0][value]' => $this->randomMachineName(20),
-    );
+    ];
     sleep(1);
     $this->drupalPostForm('comment/reply/node/' . $node->id() . '/comment', $comment, t('Save'));
     // Reload the node so that comment.module's hook_node_load()
@@ -277,22 +277,22 @@ function testTrackerHistoryMetadata() {
   function testTrackerOrderingNewComments() {
     $this->drupalLogin($this->user);
 
-    $node_one = $this->drupalCreateNode(array(
+    $node_one = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
-    ));
+    ]);
 
-    $node_two = $this->drupalCreateNode(array(
+    $node_two = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
-    ));
+    ]);
 
     // Now get otherUser to track these pieces of content.
     $this->drupalLogin($this->otherUser);
 
     // Add a comment to the first page.
-    $comment = array(
+    $comment = [
       'subject[0][value]' => $this->randomMachineName(),
       'comment_body[0][value]' => $this->randomMachineName(20),
-    );
+    ];
     $this->drupalPostForm('comment/reply/node/' . $node_one->id() . '/comment', $comment, t('Save'));
 
     // If the comment is posted in the same second as the last one then Drupal
@@ -300,10 +300,10 @@ function testTrackerOrderingNewComments() {
     sleep(1);
 
     // Add a comment to the second page.
-    $comment = array(
+    $comment = [
       'subject[0][value]' => $this->randomMachineName(),
       'comment_body[0][value]' => $this->randomMachineName(20),
-    );
+    ];
     $this->drupalPostForm('comment/reply/node/' . $node_two->id() . '/comment', $comment, t('Save'));
 
     // We should at this point have in our tracker for otherUser:
@@ -320,10 +320,10 @@ function testTrackerOrderingNewComments() {
     sleep(1);
 
     // Add a comment to the second page.
-    $comment = array(
+    $comment = [
       'subject[0][value]' => $this->randomMachineName(),
       'comment_body[0][value]' => $this->randomMachineName(20),
-    );
+    ];
     $this->drupalPostForm('comment/reply/node/' . $node_one->id() . '/comment', $comment, t('Save'));
 
     // Switch back to the otherUser and assert that the order has swapped.
@@ -344,21 +344,21 @@ function testTrackerCronIndexing() {
     $this->drupalLogin($this->user);
 
     // Create 3 nodes.
-    $edits = array();
-    $nodes = array();
+    $edits = [];
+    $nodes = [];
     for ($i = 1; $i <= 3; $i++) {
-      $edits[$i] = array(
+      $edits[$i] = [
         'title' => $this->randomMachineName(),
-      );
+      ];
       $nodes[$i] = $this->drupalCreateNode($edits[$i]);
     }
 
     // Add a comment to the last node as other user.
     $this->drupalLogin($this->otherUser);
-    $comment = array(
+    $comment = [
       'subject[0][value]' => $this->randomMachineName(),
       'comment_body[0][value]' => $this->randomMachineName(20),
-    );
+    ];
     $this->drupalPostForm('comment/reply/node/' . $nodes[3]->id() . '/comment', $comment, t('Save'));
 
     // Start indexing backwards from node 3.
@@ -378,7 +378,7 @@ function testTrackerCronIndexing() {
 
     // Assert that all node titles are displayed.
     foreach ($nodes as $i => $node) {
-      $this->assertText($node->label(), format_string('Node @i is displayed on the tracker listing pages.', array('@i' => $i)));
+      $this->assertText($node->label(), format_string('Node @i is displayed on the tracker listing pages.', ['@i' => $i]));
     }
 
     // Fetch the site-wide tracker.
@@ -386,7 +386,7 @@ function testTrackerCronIndexing() {
 
     // Assert that all node titles are displayed.
     foreach ($nodes as $i => $node) {
-      $this->assertText($node->label(), format_string('Node @i is displayed on the tracker listing pages.', array('@i' => $i)));
+      $this->assertText($node->label(), format_string('Node @i is displayed on the tracker listing pages.', ['@i' => $i]));
     }
   }
 
@@ -394,24 +394,24 @@ function testTrackerCronIndexing() {
    * Tests that publish/unpublish works at admin/content/node.
    */
   function testTrackerAdminUnpublish() {
-    \Drupal::service('module_installer')->install(array('views'));
+    \Drupal::service('module_installer')->install(['views']);
     \Drupal::service('router.builder')->rebuild();
-    $admin_user = $this->drupalCreateUser(array('access content overview', 'administer nodes', 'bypass node access'));
+    $admin_user = $this->drupalCreateUser(['access content overview', 'administer nodes', 'bypass node access']);
     $this->drupalLogin($admin_user);
 
-    $node = $this->drupalCreateNode(array(
+    $node = $this->drupalCreateNode([
       'title' => $this->randomMachineName(),
-    ));
+    ]);
 
     // Assert that the node is displayed.
     $this->drupalGet('activity');
     $this->assertText($node->label(), 'A node is displayed on the tracker listing pages.');
 
     // Unpublish the node and ensure that it's no longer displayed.
-    $edit = array(
+    $edit = [
       'action' => 'node_unpublish_action',
       'node_bulk_form[0]' => $node->id(),
-    );
+    ];
     $this->drupalPostForm('admin/content', $edit, t('Apply to selected items'));
 
     $this->drupalGet('activity');
diff --git a/core/modules/tracker/src/Tests/Views/TrackerTestBase.php b/core/modules/tracker/src/Tests/Views/TrackerTestBase.php
index 7b2f9462ef902e1da4840fb5d1c31cb44491196a..53c21f906c12da7dee457273d3c4fff452ec6431 100644
--- a/core/modules/tracker/src/Tests/Views/TrackerTestBase.php
+++ b/core/modules/tracker/src/Tests/Views/TrackerTestBase.php
@@ -20,7 +20,7 @@ abstract class TrackerTestBase extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('comment', 'tracker', 'tracker_test_views');
+  public static $modules = ['comment', 'tracker', 'tracker_test_views'];
 
   /**
    * The node used for testing.
@@ -39,30 +39,30 @@ abstract class TrackerTestBase extends ViewTestBase {
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('tracker_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['tracker_test_views']);
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
     // Add a comment field.
     $this->addDefaultCommentField('node', 'page');
 
-    $permissions = array('access comments', 'create page content', 'post comments', 'skip comment approval');
+    $permissions = ['access comments', 'create page content', 'post comments', 'skip comment approval'];
     $account = $this->drupalCreateUser($permissions);
 
     $this->drupalLogin($account);
 
-    $this->node = $this->drupalCreateNode(array(
+    $this->node = $this->drupalCreateNode([
       'title' => $this->randomMachineName(8),
       'uid' => $account->id(),
       'status' => 1,
-    ));
+    ]);
 
-    $this->comment = Comment::create(array(
+    $this->comment = Comment::create([
       'entity_id' => $this->node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment',
       'subject' => $this->randomMachineName(),
       'comment_body[' . LanguageInterface::LANGCODE_NOT_SPECIFIED . '][0][value]' => $this->randomMachineName(20),
-    ));
+    ]);
 
   }
 
diff --git a/core/modules/tracker/src/Tests/Views/TrackerUserUidTest.php b/core/modules/tracker/src/Tests/Views/TrackerUserUidTest.php
index 68b77777aa7179d7a1911bd2ee0d36965ab42239..54732a02e8f9ce5114a7ae114ea5a659c0141b1f 100644
--- a/core/modules/tracker/src/Tests/Views/TrackerUserUidTest.php
+++ b/core/modules/tracker/src/Tests/Views/TrackerUserUidTest.php
@@ -16,29 +16,29 @@ class TrackerUserUidTest extends TrackerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_tracker_user_uid');
+  public static $testViews = ['test_tracker_user_uid'];
 
   /**
    * Tests the user uid filter and argument.
    */
   public function testUserUid() {
-    $map = array(
+    $map = [
       'nid' => 'nid',
       'title' => 'title',
-    );
+    ];
 
-    $expected = array(
-      array(
+    $expected = [
+      [
         'nid' => $this->node->id(),
         'title' => $this->node->label(),
-      )
-    );
+      ]
+    ];
 
     $view = Views::getView('test_tracker_user_uid');
     $this->executeView($view);
 
     // We should have no results as the filter is set for uid 0.
-    $this->assertIdenticalResultSet($view, array(), $map);
+    $this->assertIdenticalResultSet($view, [], $map);
     $view->destroy();
 
     // Change the filter value to our user.
@@ -55,13 +55,13 @@ public function testUserUid() {
 
     // Test the incorrect argument UID.
     $view->initHandlers();
-    $this->executeView($view, array(rand()));
-    $this->assertIdenticalResultSet($view, array(), $map);
+    $this->executeView($view, [rand()]);
+    $this->assertIdenticalResultSet($view, [], $map);
     $view->destroy();
 
     // Test the correct argument UID.
     $view->initHandlers();
-    $this->executeView($view, array($this->node->getOwnerId()));
+    $this->executeView($view, [$this->node->getOwnerId()]);
     $this->assertIdenticalResultSet($view, $expected, $map);
   }
 
diff --git a/core/modules/tracker/tests/src/Functional/TrackerNodeAccessTest.php b/core/modules/tracker/tests/src/Functional/TrackerNodeAccessTest.php
index 1d33a23de322847fd0ff195fdc1bd79feb02a253..ae9a6e0ebb9de5f4c99fd21969301e0437fbc9df 100644
--- a/core/modules/tracker/tests/src/Functional/TrackerNodeAccessTest.php
+++ b/core/modules/tracker/tests/src/Functional/TrackerNodeAccessTest.php
@@ -21,12 +21,12 @@ class TrackerNodeAccessTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'comment', 'tracker', 'node_access_test');
+  public static $modules = ['node', 'comment', 'tracker', 'node_access_test'];
 
   protected function setUp() {
     parent::setUp();
     node_access_rebuild();
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     node_access_test_add_field(NodeType::load('page'));
     $this->addDefaultCommentField('node', 'page', 'comment', CommentItemInterface::OPEN);
     \Drupal::state()->set('node_access_test.private', TRUE);
@@ -37,22 +37,22 @@ protected function setUp() {
    */
   function testTrackerNodeAccess() {
     // Create user with node test view permission.
-    $access_user = $this->drupalCreateUser(array('node test view', 'access user profiles'));
+    $access_user = $this->drupalCreateUser(['node test view', 'access user profiles']);
 
     // Create user without node test view permission.
-    $no_access_user = $this->drupalCreateUser(array('access user profiles'));
+    $no_access_user = $this->drupalCreateUser(['access user profiles']);
 
     $this->drupalLogin($access_user);
 
     // Create some nodes.
-    $private_node = $this->drupalCreateNode(array(
+    $private_node = $this->drupalCreateNode([
       'title' => t('Private node test'),
       'private' => TRUE,
-    ));
-    $public_node = $this->drupalCreateNode(array(
+    ]);
+    $public_node = $this->drupalCreateNode([
       'title' => t('Public node test'),
       'private' => FALSE,
-    ));
+    ]);
 
     // User with access should see both nodes created.
     $this->drupalGet('activity');
diff --git a/core/modules/tracker/tracker.install b/core/modules/tracker/tracker.install
index 5f3e5a0fd1f0903b5d187b9127503913c8437381..bc9ebc57c69920d3561fc7fcb11a349b492d5d4a 100644
--- a/core/modules/tracker/tracker.install
+++ b/core/modules/tracker/tracker.install
@@ -29,90 +29,90 @@ function tracker_install() {
  * Implements hook_schema().
  */
 function tracker_schema() {
-  $schema['tracker_node'] = array(
+  $schema['tracker_node'] = [
     'description' => 'Tracks when nodes were last changed or commented on.',
-    'fields' => array(
-      'nid' => array(
+    'fields' => [
+      'nid' => [
         'description' => 'The {node}.nid this record tracks.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'published' => array(
+      ],
+      'published' => [
         'description' => 'Boolean indicating whether the node is published.',
         'type' => 'int',
         'not null' => FALSE,
         'default' => 0,
         'size' => 'tiny',
-      ),
-      'changed' => array(
+      ],
+      'changed' => [
         'description' => 'The Unix timestamp when the node was most recently saved or commented on.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'indexes' => array(
-      'tracker' => array('published', 'changed'),
-    ),
-    'primary key' => array('nid'),
-    'foreign keys' => array(
-      'tracked_node' => array(
+      ],
+    ],
+    'indexes' => [
+      'tracker' => ['published', 'changed'],
+    ],
+    'primary key' => ['nid'],
+    'foreign keys' => [
+      'tracked_node' => [
         'table' => 'node',
-        'columns' => array('nid' => 'nid'),
-      ),
-    ),
-  );
+        'columns' => ['nid' => 'nid'],
+      ],
+    ],
+  ];
 
-  $schema['tracker_user'] = array(
+  $schema['tracker_user'] = [
     'description' => 'Tracks when nodes were last changed or commented on, for each user that authored the node or one of its comments.',
-    'fields' => array(
-      'nid' => array(
+    'fields' => [
+      'nid' => [
         'description' => 'The {node}.nid this record tracks.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'uid' => array(
+      ],
+      'uid' => [
         'description' => 'The {users}.uid of the node author or commenter.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'published' => array(
+      ],
+      'published' => [
         'description' => 'Boolean indicating whether the node is published.',
         'type' => 'int',
         'not null' => FALSE,
         'default' => 0,
         'size' => 'tiny',
-      ),
-      'changed' => array(
+      ],
+      'changed' => [
         'description' => 'The Unix timestamp when the node was most recently saved or commented on.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'indexes' => array(
-      'tracker' => array('uid', 'published', 'changed'),
-    ),
-    'primary key' => array('nid', 'uid'),
-    'foreign keys' => array(
-      'tracked_node' => array(
+      ],
+    ],
+    'indexes' => [
+      'tracker' => ['uid', 'published', 'changed'],
+    ],
+    'primary key' => ['nid', 'uid'],
+    'foreign keys' => [
+      'tracked_node' => [
         'table' => 'node',
-        'columns' => array('nid' => 'nid'),
-      ),
-      'tracked_user' => array(
+        'columns' => ['nid' => 'nid'],
+      ],
+      'tracked_user' => [
         'table' => 'users',
-        'columns' => array('uid' => 'uid'),
-      ),
-    ),
-  );
+        'columns' => ['uid' => 'uid'],
+      ],
+    ],
+  ];
 
   return $schema;
 }
diff --git a/core/modules/tracker/tracker.module b/core/modules/tracker/tracker.module
index 1b2f648df5ea12ae6ad893bd5d5cf3ead4866caa..dbde704a5a144a102cb5dad9da355ed18c63c808 100644
--- a/core/modules/tracker/tracker.module
+++ b/core/modules/tracker/tracker.module
@@ -19,11 +19,11 @@ function tracker_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.tracker':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Activity Tracker module displays the most recently added and updated content on your site, and allows you to follow new content created by each user. This module has no configuration options. For more information, see the <a href=":tracker">online documentation for the Activity Tracker module</a>.', array(':tracker' => 'https://www.drupal.org/documentation/modules/tracker')) . '</p>';
+      $output .= '<p>' . t('The Activity Tracker module displays the most recently added and updated content on your site, and allows you to follow new content created by each user. This module has no configuration options. For more information, see the <a href=":tracker">online documentation for the Activity Tracker module</a>.', [':tracker' => 'https://www.drupal.org/documentation/modules/tracker']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Tracking new and updated site content') . '</dt>';
-      $output .= '<dd>' . t('The <a href=":recent">Recent content</a> page shows new and updated content in reverse chronological order, listing the content type, title, author\'s name, number of comments, and time of last update. Content is considered updated when changes occur in the text, or when new comments are added. The <em>My recent content</em> tab limits the list to the currently logged-in user.', array(':recent' => \Drupal::url('tracker.page'))) . '</dd>';
+      $output .= '<dd>' . t('The <a href=":recent">Recent content</a> page shows new and updated content in reverse chronological order, listing the content type, title, author\'s name, number of comments, and time of last update. Content is considered updated when changes occur in the text, or when new comments are added. The <em>My recent content</em> tab limits the list to the currently logged-in user.', [':recent' => \Drupal::url('tracker.page')]) . '</dd>';
       $output .= '<dt>' . t('Tracking user-specific content') . '</dt>';
       $output .= '<dd>' . t("To follow a specific user's new and updated content, select the <em>Activity</em> tab from the user's profile page.") . '</dd>';
       $output .= '</dl>';
@@ -70,21 +70,21 @@ function tracker_cron() {
 
       // Insert the node-level data.
       db_insert('tracker_node')
-        ->fields(array(
+        ->fields([
           'nid' => $nid,
           'published' => $node->isPublished(),
           'changed' => $changed,
-        ))
+        ])
         ->execute();
 
       // Insert the user-level data for the node's author.
       db_insert('tracker_user')
-        ->fields(array(
+        ->fields([
           'nid' => $nid,
           'published' => $node->isPublished(),
           'changed' => $changed,
           'uid' => $node->getOwnerId(),
-        ))
+        ])
         ->execute();
 
       // Insert the user-level data for the commenters (except if a commenter
@@ -103,12 +103,12 @@ function tracker_cron() {
       if ($result) {
         $query = db_insert('tracker_user');
         foreach ($result as $row) {
-          $query->fields(array(
+          $query->fields([
             'uid' => $row['uid'],
             'nid' => $nid,
             'published' => CommentInterface::PUBLISHED,
             'changed' => $changed,
-          ));
+          ]);
         }
         $query->execute();
       }
@@ -123,7 +123,7 @@ function tracker_cron() {
       // Prepare a starting point for the next run.
       $state->set('tracker.index_nid', $last_nid - 1);
 
-      \Drupal::logger('tracker')->notice('Indexed %count content items for tracking.', array('%count' => $count));
+      \Drupal::logger('tracker')->notice('Indexed %count content items for tracking.', ['%count' => $count]);
     }
     else {
       // If all nodes have been indexed, set to zero to skip future cron runs.
@@ -242,7 +242,7 @@ function tracker_comment_delete(CommentInterface $comment) {
 function _tracker_add($nid, $uid, $changed) {
   // @todo This should be actually filtering on the desired language and just
   //   fall back to the default language.
-  $node = db_query('SELECT nid, status, uid, changed FROM {node_field_data} WHERE nid = :nid AND default_langcode = 1 ORDER BY changed DESC, status DESC', array(':nid' => $nid))->fetchObject();
+  $node = db_query('SELECT nid, status, uid, changed FROM {node_field_data} WHERE nid = :nid AND default_langcode = 1 ORDER BY changed DESC, status DESC', [':nid' => $nid])->fetchObject();
 
   // Adding a comment can only increase the changed timestamp, so our
   // calculation here is simple.
@@ -251,30 +251,30 @@ function _tracker_add($nid, $uid, $changed) {
   // Update the node-level data.
   db_merge('tracker_node')
     ->key('nid', $nid)
-    ->fields(array(
+    ->fields([
       'changed' => $changed,
       'published' => $node->status,
-    ))
+    ])
     ->execute();
 
   // Create or update the user-level data, first for the user posting.
   db_merge('tracker_user')
-    ->keys(array(
+    ->keys([
       'nid' => $nid,
       'uid' => $uid,
-    ))
-    ->fields(array(
+    ])
+    ->fields([
       'changed' => $changed,
       'published' => $node->status,
-    ))
+    ])
     ->execute();
   // Update the times for all the other users tracking the post.
   db_update('tracker_user')
     ->condition('nid', $nid)
-    ->fields(array(
+    ->fields([
       'changed' => $changed,
       'published' => $node->status,
-    ))
+    ])
     ->execute();
 }
 
@@ -293,7 +293,7 @@ function _tracker_add($nid, $uid, $changed) {
  */
 function _tracker_calculate_changed($node) {
   $changed = $node->getChangedTime();
-  $latest_comment = \Drupal::service('comment.statistics')->read(array($node), 'node', FALSE);
+  $latest_comment = \Drupal::service('comment.statistics')->read([$node], 'node', FALSE);
   if ($latest_comment && $latest_comment->last_comment_timestamp > $changed) {
     $changed = $latest_comment->last_comment_timestamp;
   }
@@ -343,7 +343,7 @@ function _tracker_remove($nid, $uid = NULL, $changed = NULL) {
     // and the node itself.
     // We only need to do this if the removed item has a timestamp that equals
     // or exceeds the listed changed timestamp for the node.
-    $tracker_node = db_query('SELECT nid, changed FROM {tracker_node} WHERE nid = :nid', array(':nid' => $nid))->fetchObject();
+    $tracker_node = db_query('SELECT nid, changed FROM {tracker_node} WHERE nid = :nid', [':nid' => $nid])->fetchObject();
     if ($tracker_node && $changed >= $tracker_node->changed) {
       // If we're here, the item being removed is *possibly* the item that
       // established the node's changed timestamp.
@@ -354,17 +354,17 @@ function _tracker_remove($nid, $uid = NULL, $changed = NULL) {
       // And then we push the out the new changed timestamp to our denormalized
       // tables.
       db_update('tracker_node')
-        ->fields(array(
+        ->fields([
           'changed' => $changed,
           'published' => $node->isPublished(),
-        ))
+        ])
         ->condition('nid', $nid)
         ->execute();
       db_update('tracker_node')
-        ->fields(array(
+        ->fields([
           'changed' => $changed,
           'published' => $node->isPublished(),
-        ))
+        ])
         ->condition('nid', $nid)
         ->execute();
     }
diff --git a/core/modules/tracker/tracker.pages.inc b/core/modules/tracker/tracker.pages.inc
index e3082acfcca28452906af0a73e0157d661fef4f2..76a775f45b1ace26e330d96fea98fa2b92472495 100644
--- a/core/modules/tracker/tracker.pages.inc
+++ b/core/modules/tracker/tracker.pages.inc
@@ -30,7 +30,7 @@ function tracker_page($account = NULL) {
       ->condition('t.uid', $account->id());
   }
   else {
-    $query = db_select('tracker_node', 't', array('target' => 'replica'))
+    $query = db_select('tracker_node', 't', ['target' => 'replica'])
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender')
       ->addMetaData('base_table', 'tracker_node');
   }
@@ -39,7 +39,7 @@ function tracker_page($account = NULL) {
   // while keeping the correct order.
   $tracker_data = $query
     ->addTag('node_access')
-    ->fields('t', array('nid', 'changed'))
+    ->fields('t', ['nid', 'changed'])
     ->condition('t.published', 1)
     ->orderBy('t.changed', 'DESC')
     ->limit(25)
@@ -86,34 +86,34 @@ function tracker_page($account = NULL) {
         $comments = $node->comment_count;
       }
 
-      $row = array(
+      $row = [
         'type' => node_get_type_label($node),
-        'title' => array(
-          'data' => array(
+        'title' => [
+          'data' => [
             '#type' => 'link',
             '#url' => $node->urlInfo(),
             '#title' => $node->getTitle(),
-          ),
+          ],
           'data-history-node-id' => $node->id(),
           'data-history-node-timestamp' => $node->getChangedTime(),
-        ),
-        'author' => array(
-          'data' => array(
+        ],
+        'author' => [
+          'data' => [
             '#theme' => 'username',
             '#account' => $node->getOwner(),
-          ),
-        ),
-        'comments' => array(
-          'class' => array('comments'),
+          ],
+        ],
+        'comments' => [
+          'class' => ['comments'],
           'data' => $comments,
           'data-history-node-last-comment-timestamp' => $node->last_comment_timestamp,
-        ),
-        'last updated' => array(
-          'data' => t('@time ago', array(
+        ],
+        'last updated' => [
+          'data' => t('@time ago', [
             '@time' => \Drupal::service('date.formatter')->formatTimeDiffSince($node->last_activity),
-          )),
-        ),
-      );
+          ]),
+        ],
+      ];
 
       $rows[] = $row;
 
@@ -128,16 +128,16 @@ function tracker_page($account = NULL) {
   // Add the list cache tag for nodes.
   $cache_tags = Cache::mergeTags($cache_tags, \Drupal::entityManager()->getDefinition('node')->getListCacheTags());
 
-  $page['tracker'] = array(
+  $page['tracker'] = [
     '#rows' => $rows,
-    '#header' => array(t('Type'), t('Title'), t('Author'), t('Comments'), t('Last updated')),
+    '#header' => [t('Type'), t('Title'), t('Author'), t('Comments'), t('Last updated')],
     '#type' => 'table',
     '#empty' => t('No content available.'),
-  );
-  $page['pager'] = array(
+  ];
+  $page['pager'] = [
     '#type' => 'pager',
     '#weight' => 10,
-  );
+  ];
   $page['#sorted'] = TRUE;
   $page['#cache']['tags'] = $cache_tags;
   $page['#cache']['contexts'][] = 'user.node_grants:view';
diff --git a/core/modules/tracker/tracker.views.inc b/core/modules/tracker/tracker.views.inc
index b7e4b9547d0c974402d0ba7f3b436fe1bdb374d7..54402879dd5eedabfe9b91900e14ac692e0f323e 100644
--- a/core/modules/tracker/tracker.views.inc
+++ b/core/modules/tracker/tracker.views.inc
@@ -9,146 +9,146 @@
  * Implements hook_views_data().
  */
 function tracker_views_data() {
-  $data = array();
+  $data = [];
 
   $data['tracker_node']['table']['group'] = t('Tracker');
-  $data['tracker_node']['table']['join'] = array(
-    'node_field_data' => array(
+  $data['tracker_node']['table']['join'] = [
+    'node_field_data' => [
       'type' => 'INNER',
       'left_field' => 'nid',
       'field' => 'nid',
-    ),
-  );
-  $data['tracker_node']['nid'] = array(
+    ],
+  ];
+  $data['tracker_node']['nid'] = [
     'title' => t('Nid'),
     'help' => t('The node ID of the node.'),
-    'field' => array(
+    'field' => [
       'id' => 'node',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'node_nid',
       'name field' => 'title',
       'numeric' => TRUE,
       'validate type' => 'nid',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'numeric',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
-  $data['tracker_node']['published'] = array(
+    ],
+  ];
+  $data['tracker_node']['published'] = [
     'title' => t('Published'),
     'help' => t('Whether or not the node is published.'),
-    'field' => array(
+    'field' => [
       'id' => 'boolean',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'boolean',
       'label' => t('Published'),
       'type' => 'yes-no',
       'accept null' => TRUE,
       'use_equal' => TRUE,
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
-  $data['tracker_node']['changed'] = array(
+    ],
+  ];
+  $data['tracker_node']['changed'] = [
     'title' => t('Updated date'),
     'help' => t('The date the node was last updated.'),
-    'field' => array(
+    'field' => [
       'id' => 'date',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'date',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'date',
-    ),
-  );
+    ],
+  ];
 
   $data['tracker_user']['table']['group'] = t('Tracker - User');
-  $data['tracker_user']['table']['join'] = array(
-    'node_field_data' => array(
+  $data['tracker_user']['table']['join'] = [
+    'node_field_data' => [
       'type' => 'INNER',
       'left_field' => 'nid',
       'field' => 'nid',
-    ),
-    'user_field_data' => array(
+    ],
+    'user_field_data' => [
       'type' => 'INNER',
       'left_field' => 'uid',
       'field' => 'uid',
-    ),
-  );
-  $data['tracker_user']['nid'] = array(
+    ],
+  ];
+  $data['tracker_user']['nid'] = [
     'title' => t('Nid'),
     'help' => t('The node ID of the node a user created or commented on. You must use an argument or filter on UID or you will get misleading results using this field.'),
-    'field' => array(
+    'field' => [
       'id' => 'node',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'node_nid',
       'name field' => 'title',
       'numeric' => TRUE,
       'validate type' => 'nid',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'numeric',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
-  $data['tracker_user']['uid'] = array(
+    ],
+  ];
+  $data['tracker_user']['uid'] = [
     'title' => t('Uid'),
     'help' => t('The user ID of a user who touched the node (either created or commented on it).'),
-    'field' => array(
+    'field' => [
       'id' => 'user_name',
-    ),
-    'argument' => array(
+    ],
+    'argument' => [
       'id' => 'user_uid',
       'name field' => 'name',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'title' => t('Name'),
       'id' => 'user_name',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
-  $data['tracker_user']['published'] = array(
+    ],
+  ];
+  $data['tracker_user']['published'] = [
     'title' => t('Published'),
     'help' => t('Whether or not the node is published. You must use an argument or filter on UID or you will get misleading results using this field.'),
-    'field' => array(
+    'field' => [
       'id' => 'boolean',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'boolean',
       'label' => t('Published'),
       'type' => 'yes-no',
       'accept null' => TRUE,
       'use_equal' => TRUE,
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'standard',
-    ),
-  );
-  $data['tracker_user']['changed'] = array(
+    ],
+  ];
+  $data['tracker_user']['changed'] = [
     'title' => t('Updated date'),
     'help' => t('The date the node was last updated or commented on. You must use an argument or filter on UID or you will get misleading results using this field.'),
-    'field' => array(
+    'field' => [
       'id' => 'date',
-    ),
-    'sort' => array(
+    ],
+    'sort' => [
       'id' => 'date',
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'id' => 'date',
-    ),
-  );
+    ],
+  ];
 
   return $data;
 }
@@ -158,22 +158,22 @@ function tracker_views_data() {
  */
 function tracker_views_data_alter(&$data) {
   // Provide additional uid_touch handlers which are handled by tracker
-  $data['node_field_data']['uid_touch_tracker'] = array(
+  $data['node_field_data']['uid_touch_tracker'] = [
     'group' => t('Tracker - User'),
     'title' => t('User posted or commented'),
     'help' => t('Display nodes only if a user posted the node or commented on the node.'),
-    'argument' => array(
+    'argument' => [
       'field' => 'uid',
       'name table' => 'users_field_data',
       'name field' => 'name',
       'id' => 'tracker_user_uid',
       'no group by' => TRUE,
-    ),
-    'filter' => array(
+    ],
+    'filter' => [
       'field' => 'uid',
       'name table' => 'users_field_data',
       'name field' => 'name',
       'id' => 'tracker_user_uid'
-    ),
-  );
+    ],
+  ];
 }
diff --git a/core/modules/update/src/Controller/UpdateController.php b/core/modules/update/src/Controller/UpdateController.php
index cdd63b83af31349c880bdf5b5589894b8bfe1322..30b25c20642f58bca4438aa43fb3381182a543f7 100644
--- a/core/modules/update/src/Controller/UpdateController.php
+++ b/core/modules/update/src/Controller/UpdateController.php
@@ -44,9 +44,9 @@ public static function create(ContainerInterface $container) {
    *   A build array with the update status of projects.
    */
   public function updateStatus() {
-    $build = array(
+    $build = [
       '#theme' => 'update_report'
-    );
+    ];
     if ($available = update_get_available(TRUE)) {
       $this->moduleHandler()->loadInclude('update', 'compare.inc');
       $build['#data'] = update_calculate_project_data($available);
@@ -59,15 +59,15 @@ public function updateStatus() {
    */
   public function updateStatusManually() {
     $this->updateManager->refreshUpdateData();
-    $batch = array(
-      'operations' => array(
-        array(array($this->updateManager, 'fetchDataBatch'), array()),
-      ),
+    $batch = [
+      'operations' => [
+        [[$this->updateManager, 'fetchDataBatch'], []],
+      ],
       'finished' => 'update_fetch_data_finished',
       'title' => t('Checking available update data'),
       'progress_message' => t('Trying to check available update data ...'),
       'error_message' => t('Error checking available update data.'),
-    );
+    ];
     batch_set($batch);
     return batch_process('admin/reports/updates');
   }
diff --git a/core/modules/update/src/Form/UpdateManagerInstall.php b/core/modules/update/src/Form/UpdateManagerInstall.php
index 3bc2c78a7c8b1b8326bb6d21d092c32aa74fd224..b14118286a999d567b813d5f8a637489f5ebc256 100644
--- a/core/modules/update/src/Form/UpdateManagerInstall.php
+++ b/core/modules/update/src/Form/UpdateManagerInstall.php
@@ -79,41 +79,41 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       return $form;
     }
 
-    $form['help_text'] = array(
+    $form['help_text'] = [
       '#prefix' => '<p>',
-      '#markup' => $this->t('You can find <a href=":module_url">modules</a> and <a href=":theme_url">themes</a> on <a href=":drupal_org_url">drupal.org</a>. The following file extensions are supported: %extensions.', array(
+      '#markup' => $this->t('You can find <a href=":module_url">modules</a> and <a href=":theme_url">themes</a> on <a href=":drupal_org_url">drupal.org</a>. The following file extensions are supported: %extensions.', [
         ':module_url' => 'https://www.drupal.org/project/modules',
         ':theme_url' => 'https://www.drupal.org/project/themes',
         ':drupal_org_url' => 'https://www.drupal.org',
         '%extensions' => archiver_get_extensions(),
-      )),
+      ]),
       '#suffix' => '</p>',
-    );
+    ];
 
-    $form['project_url'] = array(
+    $form['project_url'] = [
       '#type' => 'url',
       '#title' => $this->t('Install from a URL'),
-      '#description' => $this->t('For example: %url', array('%url' => 'http://ftp.drupal.org/files/projects/name.tar.gz')),
-    );
+      '#description' => $this->t('For example: %url', ['%url' => 'http://ftp.drupal.org/files/projects/name.tar.gz']),
+    ];
 
-    $form['information'] = array(
+    $form['information'] = [
       '#prefix' => '<strong>',
       '#markup' => $this->t('Or'),
       '#suffix' => '</strong>',
-    );
+    ];
 
-    $form['project_upload'] = array(
+    $form['project_upload'] = [
       '#type' => 'file',
       '#title' => $this->t('Upload a module or theme archive to install'),
-      '#description' => $this->t('For example: %filename from your local computer', array('%filename' => 'name.tar.gz')),
-    );
+      '#description' => $this->t('For example: %filename from your local computer', ['%filename' => 'name.tar.gz']),
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#button_type' => 'primary',
       '#value' => $this->t('Install'),
-    );
+    ];
 
     return $form;
   }
@@ -136,12 +136,12 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if ($form_state->getValue('project_url')) {
       $local_cache = update_manager_file_get($form_state->getValue('project_url'));
       if (!$local_cache) {
-        drupal_set_message($this->t('Unable to retrieve Drupal project from %url.', array('%url' => $form_state->getValue('project_url'))), 'error');
+        drupal_set_message($this->t('Unable to retrieve Drupal project from %url.', ['%url' => $form_state->getValue('project_url')]), 'error');
         return;
       }
     }
     elseif ($_FILES['files']['name']['project_upload']) {
-      $validators = array('file_validate_extensions' => array(archiver_get_extensions()));
+      $validators = ['file_validate_extensions' => [archiver_get_extensions()]];
       if (!($finfo = file_save_upload('project_upload', $validators, NULL, 0, FILE_EXISTS_REPLACE))) {
         // Failed to upload the file. file_save_upload() calls
         // drupal_set_message() on failure.
@@ -170,7 +170,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     // MODULE/) and others list an actual file (i.e., MODULE/README.TXT).
     $project = strtok($files[0], '/\\');
 
-    $archive_errors = $this->moduleHandler->invokeAll('verify_update_archive', array($project, $local_cache, $directory));
+    $archive_errors = $this->moduleHandler->invokeAll('verify_update_archive', [$project, $local_cache, $directory]);
     if (!empty($archive_errors)) {
       drupal_set_message(array_shift($archive_errors), 'error');
       // @todo: Fix me in D8: We need a way to set multiple errors on the same
@@ -204,20 +204,20 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     }
 
     if (!$project_title) {
-      drupal_set_message($this->t('Unable to determine %project name.', array('%project' => $project)), 'error');
+      drupal_set_message($this->t('Unable to determine %project name.', ['%project' => $project]), 'error');
     }
 
     if ($updater->isInstalled()) {
-      drupal_set_message($this->t('%project is already installed.', array('%project' => $project_title)), 'error');
+      drupal_set_message($this->t('%project is already installed.', ['%project' => $project_title]), 'error');
       return;
     }
 
     $project_real_location = drupal_realpath($project_location);
-    $arguments = array(
+    $arguments = [
       'project' => $project,
       'updater_name' => get_class($updater),
       'local_url' => $project_real_location,
-    );
+    ];
 
     // This process is inherently difficult to test therefore use a state flag.
     $test_authorize = FALSE;
@@ -232,7 +232,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if (fileowner($project_real_location) == fileowner($this->sitePath) && !$test_authorize) {
       $this->moduleHandler->loadInclude('update', 'inc', 'update.authorize');
       $filetransfer = new Local($this->root);
-      $response = call_user_func_array('update_authorize_run_install', array_merge(array($filetransfer), $arguments));
+      $response = call_user_func_array('update_authorize_run_install', array_merge([$filetransfer], $arguments));
       if ($response instanceof Response) {
         $form_state->setResponse($response);
       }
diff --git a/core/modules/update/src/Form/UpdateManagerUpdate.php b/core/modules/update/src/Form/UpdateManagerUpdate.php
index 44b7f62695e42a41ab6e2c1b25dfd0bd0218c736..db497c276bb53dd5ebd2d24b178b915b12992146 100644
--- a/core/modules/update/src/Form/UpdateManagerUpdate.php
+++ b/core/modules/update/src/Form/UpdateManagerUpdate.php
@@ -64,13 +64,13 @@ public static function create(ContainerInterface $container) {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $this->moduleHandler->loadInclude('update', 'inc', 'update.manager');
 
-    $last_markup = array(
+    $last_markup = [
       '#theme' => 'update_last_check',
       '#last' => $this->state->get('update.last_check') ?: 0,
-    );
-    $form['last_check'] = array(
+    ];
+    $form['last_check'] = [
       '#markup' => drupal_render($last_markup),
-    );
+    ];
 
     if (!_update_manager_check_backends($form, 'update')) {
       return $form;
@@ -78,9 +78,9 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     $available = update_get_available(TRUE);
     if (empty($available)) {
-      $form['message'] = array(
+      $form['message'] = [
         '#markup' => $this->t('There was a problem getting update information. Try again later.'),
-      );
+      ];
       return $form;
     }
 
@@ -91,11 +91,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // manual updates, such as core). Then, each subarray is an array of
     // projects of that type, indexed by project short name, and containing an
     // array of data for cells in that project's row in the appropriate table.
-    $projects = array();
+    $projects = [];
 
     // This stores the actual download link we're going to update from for each
     // project in the form, regardless of if it's enabled or disabled.
-    $form['project_downloads'] = array('#tree' => TRUE);
+    $form['project_downloads'] = ['#tree' => TRUE];
     $this->moduleHandler->loadInclude('update', 'inc', 'update.compare');
     $project_data = update_calculate_project_data($available);
     foreach ($project_data as $name => $project) {
@@ -134,25 +134,25 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         $recommended_version .= '<div title="{{ major_update_warning_title }}" class="update-major-version-warning">{{ major_update_warning_text }}</div>';
       }
 
-      $recommended_version = array(
+      $recommended_version = [
         '#type' => 'inline_template',
         '#template' => $recommended_version,
-        '#context' => array(
+        '#context' => [
           'release_version' => $recommended_release['version'],
           'release_link' => $recommended_release['release_link'],
-          'project_title' => $this->t('Release notes for @project_title', array('@project_title' => $project['title'])),
+          'project_title' => $this->t('Release notes for @project_title', ['@project_title' => $project['title']]),
           'major_update_warning_title' => $this->t('Major upgrade warning'),
           'major_update_warning_text' => $this->t('This update is a major version update which means that it may not be backwards compatible with your currently running version. It is recommended that you read the release notes and proceed at your own risk.'),
           'release_notes' => $this->t('Release notes'),
-        ),
-      );
+        ],
+      ];
 
       // Create an entry for this project.
-      $entry = array(
+      $entry = [
         'title' => $project_name,
         'installed_version' => $project['existing_version'],
-        'recommended_version' => array('data' => $recommended_version),
-      );
+        'recommended_version' => ['data' => $recommended_version],
+      ];
 
       switch ($project['status']) {
         case UPDATE_NOT_SECURE:
@@ -181,11 +181,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       }
 
       // Use the project title for the tableselect checkboxes.
-      $entry['title'] = array('data' => array(
+      $entry['title'] = ['data' => [
         '#title' => $entry['title'],
         '#markup' => $entry['title'],
-      ));
-      $entry['#attributes'] = array('class' => array('update-' . $type));
+      ]];
+      $entry['#attributes'] = ['class' => ['update-' . $type]];
 
       // Drupal core needs to be upgraded manually.
       $needs_manual = $project['project_type'] == 'core';
@@ -198,15 +198,15 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         unset($entry['#weight']);
         $attributes = $entry['#attributes'];
         unset($entry['#attributes']);
-        $entry = array(
+        $entry = [
           'data' => $entry,
-        ) + $attributes;
+        ] + $attributes;
       }
       else {
-        $form['project_downloads'][$name] = array(
+        $form['project_downloads'][$name] = [
           '#type' => 'value',
           '#value' => $recommended_release['download_link'],
-        );
+        ];
       }
 
       // Based on what kind of project this is, save the entry into the
@@ -230,62 +230,62 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     if (empty($projects)) {
-      $form['message'] = array(
+      $form['message'] = [
         '#markup' => $this->t('All of your projects are up to date.'),
-      );
+      ];
       return $form;
     }
 
-    $headers = array(
-      'title' => array(
+    $headers = [
+      'title' => [
         'data' => $this->t('Name'),
-        'class' => array('update-project-name'),
-      ),
+        'class' => ['update-project-name'],
+      ],
       'installed_version' => $this->t('Installed version'),
       'recommended_version' => $this->t('Recommended version'),
-    );
+    ];
 
     if (!empty($projects['enabled'])) {
-      $form['projects'] = array(
+      $form['projects'] = [
         '#type' => 'tableselect',
         '#header' => $headers,
         '#options' => $projects['enabled'],
-      );
+      ];
       if (!empty($projects['disabled'])) {
         $form['projects']['#prefix'] = '<h2>' . $this->t('Enabled') . '</h2>';
       }
     }
 
     if (!empty($projects['disabled'])) {
-      $form['disabled_projects'] = array(
+      $form['disabled_projects'] = [
         '#type' => 'tableselect',
         '#header' => $headers,
         '#options' => $projects['disabled'],
         '#weight' => 1,
         '#prefix' => '<h2>' . $this->t('Disabled') . '</h2>',
-      );
+      ];
     }
 
     // If either table has been printed yet, we need a submit button and to
     // validate the checkboxes.
     if (!empty($projects['enabled']) || !empty($projects['disabled'])) {
-      $form['actions'] = array('#type' => 'actions');
-      $form['actions']['submit'] = array(
+      $form['actions'] = ['#type' => 'actions'];
+      $form['actions']['submit'] = [
         '#type' => 'submit',
         '#value' => $this->t('Download these updates'),
-      );
+      ];
     }
 
     if (!empty($projects['manual'])) {
       $prefix = '<h2>' . $this->t('Manual updates required') . '</h2>';
       $prefix .= '<p>' . $this->t('Updates of Drupal core are not supported at this time.') . '</p>';
-      $form['manual_updates'] = array(
+      $form['manual_updates'] = [
         '#type' => 'table',
         '#header' => $headers,
         '#rows' => $projects['manual'],
         '#prefix' => $prefix,
         '#weight' => 120,
-      );
+      ];
     }
 
     return $form;
@@ -311,29 +311,29 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->moduleHandler->loadInclude('update', 'inc', 'update.manager');
-    $projects = array();
-    foreach (array('projects', 'disabled_projects') as $type) {
+    $projects = [];
+    foreach (['projects', 'disabled_projects'] as $type) {
       if (!$form_state->isValueEmpty($type)) {
         $projects = array_merge($projects, array_keys(array_filter($form_state->getValue($type))));
       }
     }
-    $operations = array();
+    $operations = [];
     foreach ($projects as $project) {
-      $operations[] = array(
+      $operations[] = [
         'update_manager_batch_project_get',
-        array(
+        [
           $project,
-          $form_state->getValue(array('project_downloads', $project)),
-        ),
-      );
+          $form_state->getValue(['project_downloads', $project]),
+        ],
+      ];
     }
-    $batch = array(
+    $batch = [
       'title' => $this->t('Downloading updates'),
       'init_message' => $this->t('Preparing to download selected updates'),
       'operations' => $operations,
       'finished' => 'update_manager_download_batch_finished',
       'file' => drupal_get_path('module', 'update') . '/update.manager.inc',
-    );
+    ];
     batch_set($batch);
   }
 
diff --git a/core/modules/update/src/Form/UpdateReady.php b/core/modules/update/src/Form/UpdateReady.php
index c8f64a3ee3c3efedf37a3c883e2cea00bf8c26cb..ef9a2f17122ff2ee117559d8e552335d3c9ae86f 100644
--- a/core/modules/update/src/Form/UpdateReady.php
+++ b/core/modules/update/src/Form/UpdateReady.php
@@ -91,23 +91,23 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       return $form;
     }
 
-    $form['backup'] = array(
+    $form['backup'] = [
       '#prefix' => '<strong>',
-      '#markup' => $this->t('Back up your database and site before you continue. <a href=":backup_url">Learn how</a>.', array(':backup_url' => 'https://www.drupal.org/node/22281')),
+      '#markup' => $this->t('Back up your database and site before you continue. <a href=":backup_url">Learn how</a>.', [':backup_url' => 'https://www.drupal.org/node/22281']),
       '#suffix' => '</strong>',
-    );
+    ];
 
-    $form['maintenance_mode'] = array(
+    $form['maintenance_mode'] = [
       '#title' => $this->t('Perform updates with site in maintenance mode (strongly recommended)'),
       '#type' => 'checkbox',
       '#default_value' => TRUE,
-    );
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Continue'),
-    );
+    ];
 
     return $form;
   }
@@ -126,7 +126,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       // Make sure the Updater registry is loaded.
       drupal_get_updaters();
 
-      $updates = array();
+      $updates = [];
       $directory = _update_manager_extract_directory();
 
       $projects = $_SESSION['update_manager_update_projects'];
@@ -137,11 +137,11 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         $project_location = $directory . '/' . $project;
         $updater = Updater::factory($project_location, $this->root);
         $project_real_location = drupal_realpath($project_location);
-        $updates[] = array(
+        $updates[] = [
           'project' => $project,
           'updater_name' => get_class($updater),
           'local_url' => $project_real_location,
-        );
+        ];
       }
 
       // If the owner of the last directory we extracted is the same as the
@@ -164,7 +164,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         // The page title must be passed here to ensure it is initially used
         // when authorize.php loads for the first time with the FTP/SSH
         // credentials form.
-        system_authorized_init('update_authorize_run_update', __DIR__ . '/../../update.authorize.inc', array($updates), $this->t('Update manager'));
+        system_authorized_init('update_authorize_run_update', __DIR__ . '/../../update.authorize.inc', [$updates], $this->t('Update manager'));
         $form_state->setRedirectUrl(system_authorized_get_url());
       }
     }
diff --git a/core/modules/update/src/Tests/FileTransferAuthorizeFormTest.php b/core/modules/update/src/Tests/FileTransferAuthorizeFormTest.php
index 0d0989ba97e1b514145a09e153b9416267e1c45f..9d1819fca3d8c22faade8a92f45489bd3d3952ce 100644
--- a/core/modules/update/src/Tests/FileTransferAuthorizeFormTest.php
+++ b/core/modules/update/src/Tests/FileTransferAuthorizeFormTest.php
@@ -14,11 +14,11 @@ class FileTransferAuthorizeFormTest extends UpdateTestBase {
    *
    * @var array
    */
-  public static $modules = array('update', 'update_test');
+  public static $modules = ['update', 'update_test'];
 
   protected function setUp() {
     parent::setUp();
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer software updates', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer software updates', 'administer site configuration']);
     $this->drupalLogin($admin_user);
 
     // Create a local cache so the module is not downloaded from drupal.org.
diff --git a/core/modules/update/src/Tests/UpdateContribTest.php b/core/modules/update/src/Tests/UpdateContribTest.php
index 88cf378419c5cc46d20a0b165f91273aa8c33de7..2a7c675cc5e0bc7d65f75915601357c339a99f42 100644
--- a/core/modules/update/src/Tests/UpdateContribTest.php
+++ b/core/modules/update/src/Tests/UpdateContribTest.php
@@ -18,11 +18,11 @@ class UpdateContribTest extends UpdateTestBase {
    *
    * @var array
    */
-  public static $modules = array('update_test', 'update', 'aaa_update_test', 'bbb_update_test', 'ccc_update_test');
+  public static $modules = ['update_test', 'update', 'aaa_update_test', 'bbb_update_test', 'ccc_update_test'];
 
   protected function setUp() {
     parent::setUp();
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
   }
 
@@ -30,18 +30,18 @@ protected function setUp() {
    * Tests when there is no available release data for a contrib module.
    */
   function testNoReleasesAvailable() {
-    $system_info = array(
-      '#all' => array(
+    $system_info = [
+      '#all' => [
         'version' => '8.0.0',
-      ),
-      'aaa_update_test' => array(
+      ],
+      'aaa_update_test' => [
         'project' => 'aaa_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
-    $this->refreshUpdateStatus(array('drupal' => '0.0', 'aaa_update_test' => 'no-releases'));
+    $this->refreshUpdateStatus(['drupal' => '0.0', 'aaa_update_test' => 'no-releases']);
     $this->drupalGet('admin/reports/updates');
     // Cannot use $this->standardTests() because we need to check for the
     // 'No available releases found' string.
@@ -62,22 +62,22 @@ function testNoReleasesAvailable() {
    */
   function testUpdateContribBasic() {
     $project_link = \Drupal::l(t('AAA Update test'), Url::fromUri('http://example.com/project/aaa_update_test'));
-    $system_info = array(
-      '#all' => array(
+    $system_info = [
+      '#all' => [
         'version' => '8.0.0',
-      ),
-      'aaa_update_test' => array(
+      ],
+      'aaa_update_test' => [
         'project' => 'aaa_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
     $this->refreshUpdateStatus(
-      array(
+      [
         'drupal' => '0.0',
         'aaa_update_test' => '1_0',
-      )
+      ]
     );
     $this->standardTests();
     $this->assertText(t('Up to date'));
@@ -90,10 +90,10 @@ function testUpdateContribBasic() {
     $system_info['aaa_update_test']['hidden'] = TRUE;
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
     $this->refreshUpdateStatus(
-      array(
+      [
         'drupal' => '0.0',
         'aaa_update_test' => '1_0',
-      )
+      ]
     );
     $this->assertNoRaw($project_link, 'Link to aaa_update_test project does not appear.');
 
@@ -101,10 +101,10 @@ function testUpdateContribBasic() {
     $system_info['aaa_update_test']['package'] = 'aaa_update_test';
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
     $this->refreshUpdateStatus(
-      array(
+      [
         'drupal' => '0.0',
         'aaa_update_test' => '1_0',
-      )
+      ]
     );
     $this->assertRaw($project_link, 'Link to aaa_update_test project appears.');
   }
@@ -124,38 +124,38 @@ function testUpdateContribBasic() {
    */
   function testUpdateContribOrder() {
     // We want core to be version 8.0.0.
-    $system_info = array(
-      '#all' => array(
+    $system_info = [
+      '#all' => [
         'version' => '8.0.0',
-      ),
+      ],
       // All the rest should be visible as contrib modules at version 8.x-1.0.
 
       // aaa_update_test needs to be part of the "CCC Update test" project,
       // which would throw off the report if we weren't properly sorting by
       // the project names.
-      'aaa_update_test' => array(
+      'aaa_update_test' => [
         'project' => 'ccc_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
+      ],
 
       // This should be its own project, and listed first on the report.
-      'bbb_update_test' => array(
+      'bbb_update_test' => [
         'project' => 'bbb_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
+      ],
 
       // This will contain both aaa_update_test and ccc_update_test, and
       // should come after the bbb_update_test project.
-      'ccc_update_test' => array(
+      'ccc_update_test' => [
         'project' => 'ccc_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
-    $this->refreshUpdateStatus(array('drupal' => '0.0', '#all' => '1_0'));
+    $this->refreshUpdateStatus(['drupal' => '0.0', '#all' => '1_0']);
     $this->standardTests();
     // We're expecting the report to say all projects are up to date.
     $this->assertText(t('Up to date'));
@@ -188,33 +188,33 @@ function testUpdateBaseThemeSecurityUpdate() {
     // @todo https://www.drupal.org/node/2338175 base themes have to be
     //  installed.
     // Only install the subtheme, not the base theme.
-    \Drupal::service('theme_handler')->install(array('update_test_subtheme'));
+    \Drupal::service('theme_handler')->install(['update_test_subtheme']);
 
     // Define the initial state for core and the subtheme.
-    $system_info = array(
+    $system_info = [
       // We want core to be version 8.0.0.
-      '#all' => array(
+      '#all' => [
         'version' => '8.0.0',
-      ),
+      ],
       // Show the update_test_basetheme
-      'update_test_basetheme' => array(
+      'update_test_basetheme' => [
         'project' => 'update_test_basetheme',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
+      ],
       // Show the update_test_subtheme
-      'update_test_subtheme' => array(
+      'update_test_subtheme' => [
         'project' => 'update_test_subtheme',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
-    $xml_mapping = array(
+    $xml_mapping = [
       'drupal' => '0.0',
       'update_test_subtheme' => '1_0',
       'update_test_basetheme' => '1_1-sec',
-    );
+    ];
     $this->refreshUpdateStatus($xml_mapping);
     $this->assertText(t('Security update required!'));
     $this->assertRaw(\Drupal::l(t('Update test base theme'), Url::fromUri('http://example.com/project/update_test_basetheme')), 'Link to the Update test base theme project appears.');
@@ -238,38 +238,38 @@ function testUpdateShowDisabledThemes() {
     $extension_config->save();
 
     // Define the initial state for core and the test contrib themes.
-    $system_info = array(
+    $system_info = [
       // We want core to be version 8.0.0.
-      '#all' => array(
+      '#all' => [
         'version' => '8.0.0',
-      ),
+      ],
       // The update_test_basetheme should be visible and up to date.
-      'update_test_basetheme' => array(
+      'update_test_basetheme' => [
         'project' => 'update_test_basetheme',
         'version' => '8.x-1.1',
         'hidden' => FALSE,
-      ),
+      ],
       // The update_test_subtheme should be visible and up to date.
-      'update_test_subtheme' => array(
+      'update_test_subtheme' => [
         'project' => 'update_test_subtheme',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-    );
+      ],
+    ];
     // When there are contributed modules in the site's file system, the
     // total number of attempts made in the test may exceed the default value
     // of update_max_fetch_attempts. Therefore this variable is set very high
     // to avoid test failures in those cases.
     $update_settings->set('fetch.max_attempts', 99999)->save();
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
-    $xml_mapping = array(
+    $xml_mapping = [
       'drupal' => '0.0',
       'update_test_subtheme' => '1_0',
       'update_test_basetheme' => '1_1-sec',
-    );
+    ];
     $base_theme_project_link = \Drupal::l(t('Update test base theme'), Url::fromUri('http://example.com/project/update_test_basetheme'));
     $sub_theme_project_link = \Drupal::l(t('Update test subtheme'), Url::fromUri('http://example.com/project/update_test_subtheme'));
-    foreach (array(TRUE, FALSE) as $check_disabled) {
+    foreach ([TRUE, FALSE] as $check_disabled) {
       $update_settings->set('check.disabled_extensions', $check_disabled)->save();
       $this->refreshUpdateStatus($xml_mapping);
       // In neither case should we see the "Themes" heading for installed
@@ -295,21 +295,21 @@ function testUpdateHiddenBaseTheme() {
     module_load_include('compare.inc', 'update');
 
     // Install the subtheme.
-    \Drupal::service('theme_handler')->install(array('update_test_subtheme'));
+    \Drupal::service('theme_handler')->install(['update_test_subtheme']);
 
     // Add a project and initial state for base theme and subtheme.
-    $system_info = array(
+    $system_info = [
       // Hide the update_test_basetheme.
-      'update_test_basetheme' => array(
+      'update_test_basetheme' => [
         'project' => 'update_test_basetheme',
         'hidden' => TRUE,
-      ),
+      ],
       // Show the update_test_subtheme.
-      'update_test_subtheme' => array(
+      'update_test_subtheme' => [
         'project' => 'update_test_subtheme',
         'hidden' => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
     $projects = \Drupal::service('update.manager')->getProjects();
     $theme_data = \Drupal::service('theme_handler')->rebuildThemeData();
@@ -323,37 +323,37 @@ function testUpdateHiddenBaseTheme() {
    * Makes sure that if we fetch from a broken URL, sane things happen.
    */
   function testUpdateBrokenFetchURL() {
-    $system_info = array(
-      '#all' => array(
+    $system_info = [
+      '#all' => [
         'version' => '8.0.0',
-      ),
-      'aaa_update_test' => array(
+      ],
+      'aaa_update_test' => [
         'project' => 'aaa_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-      'bbb_update_test' => array(
+      ],
+      'bbb_update_test' => [
         'project' => 'bbb_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-      'ccc_update_test' => array(
+      ],
+      'ccc_update_test' => [
         'project' => 'ccc_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
 
     // Ensure that the update information is correct before testing.
     $this->drupalGet('admin/reports/updates');
 
-    $xml_mapping = array(
+    $xml_mapping = [
       'drupal' => '0.0',
       'aaa_update_test' => '1_0',
       'bbb_update_test' => 'does-not-exist',
       'ccc_update_test' => '1_0',
-    );
+    ];
     $this->refreshUpdateStatus($xml_mapping);
 
     $this->assertText(t('Up to date'));
@@ -388,31 +388,31 @@ function testUpdateBrokenFetchURL() {
    */
   function testHookUpdateStatusAlter() {
     $update_test_config = $this->config('update_test.settings');
-    $update_admin_user = $this->drupalCreateUser(array('administer site configuration', 'administer software updates'));
+    $update_admin_user = $this->drupalCreateUser(['administer site configuration', 'administer software updates']);
     $this->drupalLogin($update_admin_user);
 
-    $system_info = array(
-      '#all' => array(
+    $system_info = [
+      '#all' => [
         'version' => '8.0.0',
-      ),
-      'aaa_update_test' => array(
+      ],
+      'aaa_update_test' => [
         'project' => 'aaa_update_test',
         'version' => '8.x-1.0',
         'hidden' => FALSE,
-      ),
-    );
+      ],
+    ];
     $update_test_config->set('system_info', $system_info)->save();
-    $update_status = array(
-      'aaa_update_test' => array(
+    $update_status = [
+      'aaa_update_test' => [
         'status' => UPDATE_NOT_SECURE,
-      ),
-    );
+      ],
+    ];
     $update_test_config->set('update_status', $update_status)->save();
     $this->refreshUpdateStatus(
-      array(
+      [
         'drupal' => '0.0',
         'aaa_update_test' => '1_0',
-      )
+      ]
     );
     $this->drupalGet('admin/reports/updates');
     $this->assertRaw('<h3>' . t('Modules') . '</h3>');
@@ -421,7 +421,7 @@ function testHookUpdateStatusAlter() {
 
     // Visit the reports page again without the altering and make sure the
     // status is back to normal.
-    $update_test_config->set('update_status', array())->save();
+    $update_test_config->set('update_status', [])->save();
     $this->drupalGet('admin/reports/updates');
     $this->assertRaw('<h3>' . t('Modules') . '</h3>');
     $this->assertNoText(t('Security update required!'));
@@ -433,7 +433,7 @@ function testHookUpdateStatusAlter() {
     $this->assertText(t('Security update'));
 
     // Turn the altering back off and visit the Update manager UI.
-    $update_test_config->set('update_status', array())->save();
+    $update_test_config->set('update_status', [])->save();
     $this->drupalGet('admin/modules/update');
     $this->assertNoText(t('Security update'));
   }
diff --git a/core/modules/update/src/Tests/UpdateCoreTest.php b/core/modules/update/src/Tests/UpdateCoreTest.php
index baecde88c50396434fba8cad73946f2043ccc8ec..48b3fcdcd989bff24a68317d3d4e9d038501be01 100644
--- a/core/modules/update/src/Tests/UpdateCoreTest.php
+++ b/core/modules/update/src/Tests/UpdateCoreTest.php
@@ -21,7 +21,7 @@ class UpdateCoreTest extends UpdateTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $admin_user = $this->drupalCreateUser(array('administer site configuration', 'administer modules', 'administer themes'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration', 'administer modules', 'administer themes']);
     $this->drupalLogin($admin_user);
     $this->drupalPlaceBlock('local_actions_block');
   }
@@ -33,11 +33,11 @@ protected function setUp() {
    *   The version.
    */
   protected function setSystemInfo($version) {
-    $setting = array(
-      '#all' => array(
+    $setting = [
+      '#all' => [
         'version' => $version,
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')->set('system_info', $setting)->save();
   }
 
@@ -45,11 +45,11 @@ protected function setSystemInfo($version) {
    * Tests the Update Manager module when no updates are available.
    */
   function testNoUpdatesAvailable() {
-    foreach (array(0, 1) as $minor_version) {
-      foreach (array(0, 1) as $patch_version) {
-        foreach (array('-alpha1', '-beta1', '') as $extra_version) {
+    foreach ([0, 1] as $minor_version) {
+      foreach ([0, 1] as $patch_version) {
+        foreach (['-alpha1', '-beta1', ''] as $extra_version) {
           $this->setSystemInfo("8.$minor_version.$patch_version" . $extra_version);
-          $this->refreshUpdateStatus(array('drupal' => "$minor_version.$patch_version" . $extra_version));
+          $this->refreshUpdateStatus(['drupal' => "$minor_version.$patch_version" . $extra_version]);
           $this->standardTests();
           $this->assertText(t('Up to date'));
           $this->assertNoText(t('Update available'));
@@ -70,9 +70,9 @@ function testNormalUpdateAvailable() {
     $this->drupalGet('admin/reports/updates/check');
     $this->assertResponse(403, 'Accessing admin/reports/updates/check without a CSRF token results in access denied.');
 
-    foreach (array(0, 1) as $minor_version) {
-      foreach (array('-alpha1', '-beta1', '') as $extra_version) {
-        $this->refreshUpdateStatus(array('drupal' => "$minor_version.1" . $extra_version));
+    foreach ([0, 1] as $minor_version) {
+      foreach (['-alpha1', '-beta1', ''] as $extra_version) {
+        $this->refreshUpdateStatus(['drupal' => "$minor_version.1" . $extra_version]);
         $this->standardTests();
         $this->drupalGet('admin/reports/updates');
         $this->clickLink(t('Check manually'));
@@ -131,11 +131,11 @@ function testNormalUpdateAvailable() {
    * Tests the Update Manager module when a major update is available.
    */
   function testMajorUpdateAvailable() {
-    foreach (array(0, 1) as $minor_version) {
-      foreach (array(0, 1) as $patch_version) {
-        foreach (array('-alpha1', '-beta1', '') as $extra_version) {
+    foreach ([0, 1] as $minor_version) {
+      foreach ([0, 1] as $patch_version) {
+        foreach (['-alpha1', '-beta1', ''] as $extra_version) {
           $this->setSystemInfo("8.$minor_version.$patch_version" . $extra_version);
-          $this->refreshUpdateStatus(array('drupal' => '9'));
+          $this->refreshUpdateStatus(['drupal' => '9']);
           $this->standardTests();
           $this->drupalGet('admin/reports/updates');
           $this->clickLink(t('Check manually'));
@@ -157,9 +157,9 @@ function testMajorUpdateAvailable() {
    * Tests the Update Manager module when a security update is available.
    */
   function testSecurityUpdateAvailable() {
-    foreach (array(0, 1) as $minor_version) {
+    foreach ([0, 1] as $minor_version) {
       $this->setSystemInfo("8.$minor_version.0");
-      $this->refreshUpdateStatus(array('drupal' => "$minor_version.2-sec"));
+      $this->refreshUpdateStatus(['drupal' => "$minor_version.2-sec"]);
       $this->standardTests();
       $this->assertNoText(t('Up to date'));
       $this->assertNoText(t('Update available'));
@@ -175,19 +175,19 @@ function testSecurityUpdateAvailable() {
    * Ensures proper results where there are date mismatches among modules.
    */
   function testDatestampMismatch() {
-    $system_info = array(
-      '#all' => array(
+    $system_info = [
+      '#all' => [
         // We need to think we're running a -dev snapshot to see dates.
         'version' => '8.1.0-dev',
         'datestamp' => time(),
-      ),
-      'block' => array(
+      ],
+      'block' => [
         // This is 2001-09-09 01:46:40 GMT, so test for "2001-Sep-".
         'datestamp' => '1000000000',
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')->set('system_info', $system_info)->save();
-    $this->refreshUpdateStatus(array('drupal' => 'dev'));
+    $this->refreshUpdateStatus(['drupal' => 'dev']);
     $this->assertNoText(t('2001-Sep-'));
     $this->assertText(t('Up to date'));
     $this->assertNoText(t('Update available'));
@@ -203,7 +203,7 @@ function testModulePageRunCron() {
       ->set('fetch.url', Url::fromRoute('update_test.update_test')->setAbsolute()->toString())
       ->save();
     $this->config('update_test.settings')
-      ->set('xml_map', array('drupal' => '0.0'))
+      ->set('xml_map', ['drupal' => '0.0'])
       ->save();
 
     $this->cronRun();
@@ -221,7 +221,7 @@ function testModulePageUpToDate() {
       ->set('fetch.url', Url::fromRoute('update_test.update_test')->setAbsolute()->toString())
       ->save();
     $this->config('update_test.settings')
-      ->set('xml_map', array('drupal' => '0.0'))
+      ->set('xml_map', ['drupal' => '0.0'])
       ->save();
 
     $this->drupalGet('admin/reports/updates');
@@ -242,7 +242,7 @@ function testModulePageRegularUpdate() {
       ->set('fetch.url', Url::fromRoute('update_test.update_test')->setAbsolute()->toString())
       ->save();
     $this->config('update_test.settings')
-      ->set('xml_map', array('drupal' => '0.1'))
+      ->set('xml_map', ['drupal' => '0.1'])
       ->save();
 
     $this->drupalGet('admin/reports/updates');
@@ -263,7 +263,7 @@ function testModulePageSecurityUpdate() {
       ->set('fetch.url', Url::fromRoute('update_test.update_test')->setAbsolute()->toString())
       ->save();
     $this->config('update_test.settings')
-      ->set('xml_map', array('drupal' => '0.2-sec'))
+      ->set('xml_map', ['drupal' => '0.2-sec'])
       ->save();
 
     $this->drupalGet('admin/reports/updates');
@@ -296,7 +296,7 @@ function testModulePageSecurityUpdate() {
    * Tests the Update Manager module when the update server returns 503 errors.
    */
   function testServiceUnavailable() {
-    $this->refreshUpdateStatus(array(), '503-error');
+    $this->refreshUpdateStatus([], '503-error');
     // Ensure that no "Warning: SimpleXMLElement..." parse errors are found.
     $this->assertNoText('SimpleXMLElement');
     $this->assertUniqueText(t('Failed to get available update data for one project.'));
@@ -306,12 +306,12 @@ function testServiceUnavailable() {
    * Tests that exactly one fetch task per project is created and not more.
    */
   function testFetchTasks() {
-    $projecta = array(
+    $projecta = [
       'name' => 'aaa_update_test',
-    );
-    $projectb = array(
+    ];
+    $projectb = [
       'name' => 'bbb_update_test',
-    );
+    ];
     $queue = \Drupal::queue('update_fetch_tasks');
     $this->assertEqual($queue->numberOfItems(), 0, 'Queue is empty');
     update_create_fetch_task($projecta);
@@ -338,7 +338,7 @@ function testLanguageModuleUpdate() {
       ->set('fetch.url', Url::fromRoute('update_test.update_test')->setAbsolute()->toString())
       ->save();
     $this->config('update_test.settings')
-      ->set('xml_map', array('drupal' => '0.1'))
+      ->set('xml_map', ['drupal' => '0.1'])
       ->save();
 
     $this->drupalGet('admin/reports/updates');
@@ -349,7 +349,7 @@ function testLanguageModuleUpdate() {
    * Ensures that the local actions appear.
    */
   public function testLocalActions() {
-    $admin_user = $this->drupalCreateUser(array('administer site configuration', 'administer modules', 'administer software updates', 'administer themes'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration', 'administer modules', 'administer software updates', 'administer themes']);
     $this->drupalLogin($admin_user);
 
     $this->drupalGet('admin/modules');
diff --git a/core/modules/update/src/Tests/UpdateDeleteFileIfStaleTest.php b/core/modules/update/src/Tests/UpdateDeleteFileIfStaleTest.php
index 63c2889a53bd429069c066242b4cb80919bc3527..96f3ca8274e8e068bcd7f14ad5f9650bc8347fb4 100644
--- a/core/modules/update/src/Tests/UpdateDeleteFileIfStaleTest.php
+++ b/core/modules/update/src/Tests/UpdateDeleteFileIfStaleTest.php
@@ -14,7 +14,7 @@ class UpdateDeleteFileIfStaleTest extends UpdateTestBase {
    *
    * @var array
    */
-  public static $modules = array('update');
+  public static $modules = ['update'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/update/src/Tests/UpdateTestBase.php b/core/modules/update/src/Tests/UpdateTestBase.php
index 9cb3c20fc05cccd8e28920cff8f9384563cb77b3..fc39d1a3ccee598e39eceb6880980608ac236180 100644
--- a/core/modules/update/src/Tests/UpdateTestBase.php
+++ b/core/modules/update/src/Tests/UpdateTestBase.php
@@ -63,7 +63,7 @@ protected function setUp() {
   protected function refreshUpdateStatus($xml_map, $url = 'update-test') {
     // Tell the Update Manager module to fetch from the URL provided by
     // update_test module.
-    $this->config('update.settings')->set('fetch.url', Url::fromUri('base:' . $url, array('absolute' => TRUE))->toString())->save();
+    $this->config('update.settings')->set('fetch.url', Url::fromUri('base:' . $url, ['absolute' => TRUE])->toString())->save();
     // Save the map for UpdateTestController::updateTest() to use.
     $this->config('update_test.settings')->set('xml_map', $xml_map)->save();
     // Manually check the update status.
diff --git a/core/modules/update/src/Tests/UpdateUploadTest.php b/core/modules/update/src/Tests/UpdateUploadTest.php
index 9b5296267bb163e78a2e65fe07383908c5123e78..c3de290d117eb5ac040b968cabe85bfaad9b2fda 100644
--- a/core/modules/update/src/Tests/UpdateUploadTest.php
+++ b/core/modules/update/src/Tests/UpdateUploadTest.php
@@ -18,11 +18,11 @@ class UpdateUploadTest extends UpdateTestBase {
    *
    * @var array
    */
-  public static $modules = array('update', 'update_test');
+  public static $modules = ['update', 'update_test'];
 
   protected function setUp() {
     parent::setUp();
-    $admin_user = $this->drupalCreateUser(array('administer modules', 'administer software updates', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer modules', 'administer software updates', 'administer site configuration']);
     $this->drupalLogin($admin_user);
   }
 
@@ -39,23 +39,23 @@ public function testUploadModule() {
     // emits a notice in strict mode.
     $imageTestFiles = $this->drupalGetTestFiles('image');
     $invalidArchiveFile = reset($imageTestFiles);
-    $edit = array(
+    $edit = [
       'files[project_upload]' => $invalidArchiveFile->uri,
-    );
+    ];
     // This also checks that the correct archive extensions are allowed.
     $this->drupalPostForm('admin/modules/install', $edit, t('Install'));
-    $this->assertText(t('Only files with the following extensions are allowed: @archive_extensions.', array('@archive_extensions' => archiver_get_extensions())), 'Only valid archives can be uploaded.');
+    $this->assertText(t('Only files with the following extensions are allowed: @archive_extensions.', ['@archive_extensions' => archiver_get_extensions()]), 'Only valid archives can be uploaded.');
     $this->assertUrl('admin/modules/install');
 
     // Check to ensure an existing module can't be reinstalled. Also checks that
     // the archive was extracted since we can't know if the module is already
     // installed until after extraction.
     $validArchiveFile = __DIR__ . '/../../tests/aaa_update_test.tar.gz';
-    $edit = array(
+    $edit = [
       'files[project_upload]' => $validArchiveFile,
-    );
+    ];
     $this->drupalPostForm('admin/modules/install', $edit, t('Install'));
-    $this->assertText(t('@module_name is already installed.', array('@module_name' => 'AAA Update test')), 'Existing module was extracted and not reinstalled.');
+    $this->assertText(t('@module_name is already installed.', ['@module_name' => 'AAA Update test']), 'Existing module was extracted and not reinstalled.');
     $this->assertUrl('admin/modules/install');
 
     // Ensure that a new module can be extracted and installed.
@@ -64,16 +64,16 @@ public function testUploadModule() {
     $installedInfoFilePath = $this->container->get('update.root') . '/' . $moduleUpdater::getRootDirectoryRelativePath() . '/update_test_new_module/update_test_new_module.info.yml';
     $this->assertFalse(file_exists($installedInfoFilePath), 'The new module does not exist in the filesystem before it is installed with the Update Manager.');
     $validArchiveFile = __DIR__ . '/../../tests/update_test_new_module/8.x-1.0/update_test_new_module.tar.gz';
-    $edit = array(
+    $edit = [
       'files[project_upload]' => $validArchiveFile,
-    );
+    ];
     $this->drupalPostForm('admin/modules/install', $edit, t('Install'));
     // Check that submitting the form takes the user to authorize.php.
     $this->assertUrl('core/authorize.php');
     $this->assertTitle('Update manager | Drupal');
     // Check for a success message on the page, and check that the installed
     // module now exists in the expected place in the filesystem.
-    $this->assertRaw(t('Installed %project_name successfully', array('%project_name' => 'update_test_new_module')));
+    $this->assertRaw(t('Installed %project_name successfully', ['%project_name' => 'update_test_new_module']));
     $this->assertTrue(file_exists($installedInfoFilePath), 'The new module exists in the filesystem after it is installed with the Update Manager.');
     // Ensure the links are relative to the site root and not
     // core/authorize.php.
@@ -98,27 +98,27 @@ public function testUploadModule() {
     $this->assertEqual($info['version'], '8.x-1.0');
 
     // Enable the module.
-    $this->drupalPostForm('admin/modules', array('modules[update_test_new_module][enable]' => TRUE), t('Install'));
+    $this->drupalPostForm('admin/modules', ['modules[update_test_new_module][enable]' => TRUE], t('Install'));
 
     // Define the update XML such that the new module downloaded above needs an
     // update from 8.x-1.0 to 8.x-1.1.
     $update_test_config = $this->config('update_test.settings');
-    $system_info = array(
-      'update_test_new_module' => array(
+    $system_info = [
+      'update_test_new_module' => [
         'project' => 'update_test_new_module',
-      ),
-    );
+      ],
+    ];
     $update_test_config->set('system_info', $system_info)->save();
-    $xml_mapping = array(
+    $xml_mapping = [
       'update_test_new_module' => '1_1',
-    );
+    ];
     $this->refreshUpdateStatus($xml_mapping);
 
     // Run the updates for the new module.
-    $this->drupalPostForm('admin/reports/updates/update', array('projects[update_test_new_module]' => TRUE), t('Download these updates'));
-    $this->drupalPostForm(NULL, array('maintenance_mode' => FALSE), t('Continue'));
+    $this->drupalPostForm('admin/reports/updates/update', ['projects[update_test_new_module]' => TRUE], t('Download these updates'));
+    $this->drupalPostForm(NULL, ['maintenance_mode' => FALSE], t('Continue'));
     $this->assertText(t('Update was completed successfully.'));
-    $this->assertRaw(t('Installed %project_name successfully', array('%project_name' => 'update_test_new_module')));
+    $this->assertRaw(t('Installed %project_name successfully', ['%project_name' => 'update_test_new_module']));
 
     // Parse the info file again to check that the module has been updated to
     // 8.x-1.1.
@@ -141,14 +141,14 @@ function testFileNameExtensionMerging() {
    * Checks the messages on update manager pages when missing a security update.
    */
   function testUpdateManagerCoreSecurityUpdateMessages() {
-    $setting = array(
-      '#all' => array(
+    $setting = [
+      '#all' => [
         'version' => '8.0.0',
-      ),
-    );
+      ],
+    ];
     $this->config('update_test.settings')
       ->set('system_info', $setting)
-      ->set('xml_map', array('drupal' => '0.2-sec'))
+      ->set('xml_map', ['drupal' => '0.2-sec'])
       ->save();
     $this->config('update.settings')
       ->set('fetch.url', Url::fromRoute('update_test.update_test')->setAbsolute()->toString())
diff --git a/core/modules/update/src/UpdateFetcher.php b/core/modules/update/src/UpdateFetcher.php
index 29d5582eef8072386c9329d4c937e0613d60b810..2b03c9c1011b00c89fb185c7dad7d3a2c843dd3a 100644
--- a/core/modules/update/src/UpdateFetcher.php
+++ b/core/modules/update/src/UpdateFetcher.php
@@ -62,7 +62,7 @@ public function fetchProjectData(array $project, $site_key = '') {
     $data = '';
     try {
       $data = (string) $this->httpClient
-        ->get($url, array('headers' => array('Accept' => 'text/xml')))
+        ->get($url, ['headers' => ['Accept' => 'text/xml']])
         ->getBody();
     }
     catch (RequestException $exception) {
diff --git a/core/modules/update/src/UpdateManager.php b/core/modules/update/src/UpdateManager.php
index 52a7eb28c2ec008e3204e8b55ddddc4413d7b660..07416915af6bd72f664ffa51b91c1b4dceb60e30 100644
--- a/core/modules/update/src/UpdateManager.php
+++ b/core/modules/update/src/UpdateManager.php
@@ -91,7 +91,7 @@ public function __construct(ConfigFactoryInterface $config_factory, ModuleHandle
     $this->keyValueStore = $key_value_expirable_factory->get('update');
     $this->themeHandler = $theme_handler;
     $this->availableReleasesTempStore = $key_value_expirable_factory->get('update_available_releases');
-    $this->projects = array();
+    $this->projects = [];
   }
 
   /**
@@ -151,11 +151,11 @@ public function getProjects() {
    * {@inheritdoc}
    */
   public function projectStorage($key) {
-    $projects = array();
+    $projects = [];
 
     // On certain paths, we should clear the data and recompute the projects for
     // update status of the site to avoid presenting stale information.
-    $route_names = array(
+    $route_names = [
       'update.theme_update',
       'system.modules_list',
       'system.theme_install',
@@ -169,12 +169,12 @@ public function projectStorage($key) {
       'update.manual_status',
       'update.confirmation_page',
       'system.themes_page',
-    );
+    ];
     if (in_array(\Drupal::routeMatch()->getRouteName(), $route_names)) {
       $this->keyValueStore->delete($key);
     }
     else {
-      $projects = $this->keyValueStore->get($key, array());
+      $projects = $this->keyValueStore->get($key, []);
     }
     return $projects;
   }
@@ -198,10 +198,10 @@ public function fetchDataBatch(&$context) {
       if ($item = $this->updateProcessor->claimQueueItem()) {
         if ($this->updateProcessor->processFetchTask($item->data)) {
           $context['results']['updated']++;
-          $context['message'] = $this->t('Checked available update data for %title.', array('%title' => $item->data['info']['name']));
+          $context['message'] = $this->t('Checked available update data for %title.', ['%title' => $item->data['info']['name']]);
         }
         else {
-          $context['message'] = $this->t('Failed to check available update data for %title.', array('%title' => $item->data['info']['name']));
+          $context['message'] = $this->t('Failed to check available update data for %title.', ['%title' => $item->data['info']['name']]);
           $context['results']['failures']++;
         }
         $context['sandbox']['progress']++;
diff --git a/core/modules/update/src/UpdateProcessor.php b/core/modules/update/src/UpdateProcessor.php
index 75e3241c095588e5dd2e271f8a08f633f5d1692d..25dfc7a004bc90dd42e104f726e64010cdda7828 100644
--- a/core/modules/update/src/UpdateProcessor.php
+++ b/core/modules/update/src/UpdateProcessor.php
@@ -104,8 +104,8 @@ public function __construct(ConfigFactoryInterface $config_factory, QueueFactory
     $this->availableReleasesTempStore = $key_value_expirable_factory->get('update_available_releases');
     $this->stateStore = $state_store;
     $this->privateKey = $private_key;
-    $this->fetchTasks = array();
-    $this->failed = array();
+    $this->fetchTasks = [];
+    $this->failed = [];
   }
 
   /**
@@ -151,7 +151,7 @@ public function processFetchTask($project) {
     $max_fetch_attempts = $this->updateSettings->get('fetch.max_attempts');
 
     $success = FALSE;
-    $available = array();
+    $available = [];
     $site_key = Crypt::hmacBase64($base_url, $this->privateKey->get());
     $fetch_url_base = $this->updateFetcher->getFetchBaseUrl($project);
     $project_name = $project['name'];
@@ -219,23 +219,23 @@ protected function parseXml($raw_xml) {
     if (!isset($xml->short_name)) {
       return NULL;
     }
-    $data = array();
+    $data = [];
     foreach ($xml as $k => $v) {
       $data[$k] = (string) $v;
     }
-    $data['releases'] = array();
+    $data['releases'] = [];
     if (isset($xml->releases)) {
       foreach ($xml->releases->children() as $release) {
         $version = (string) $release->version;
-        $data['releases'][$version] = array();
+        $data['releases'][$version] = [];
         foreach ($release->children() as $k => $v) {
           $data['releases'][$version][$k] = (string) $v;
         }
-        $data['releases'][$version]['terms'] = array();
+        $data['releases'][$version]['terms'] = [];
         if ($release->terms) {
           foreach ($release->terms->children() as $term) {
             if (!isset($data['releases'][$version]['terms'][(string) $term->name])) {
-              $data['releases'][$version]['terms'][(string) $term->name] = array();
+              $data['releases'][$version]['terms'][(string) $term->name] = [];
             }
             $data['releases'][$version]['terms'][(string) $term->name][] = (string) $term->value;
           }
diff --git a/core/modules/update/src/UpdateSettingsForm.php b/core/modules/update/src/UpdateSettingsForm.php
index d830de57f4536db6c8676ab16f0a99a03c243706..1860269d6092a1bd7093b4e480152c3096ce02df 100644
--- a/core/modules/update/src/UpdateSettingsForm.php
+++ b/core/modules/update/src/UpdateSettingsForm.php
@@ -59,42 +59,42 @@ protected function getEditableConfigNames() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('update.settings');
 
-    $form['update_check_frequency'] = array(
+    $form['update_check_frequency'] = [
       '#type' => 'radios',
       '#title' => t('Check for updates'),
       '#default_value' => $config->get('check.interval_days'),
-      '#options' => array(
+      '#options' => [
         '1' => t('Daily'),
         '7' => t('Weekly'),
-      ),
+      ],
       '#description' => t('Select how frequently you want to automatically check for new releases of your currently installed modules and themes.'),
-    );
+    ];
 
-    $form['update_check_disabled'] = array(
+    $form['update_check_disabled'] = [
       '#type' => 'checkbox',
       '#title' => t('Check for updates of uninstalled modules and themes'),
       '#default_value' => $config->get('check.disabled_extensions'),
-    );
+    ];
 
     $notification_emails = $config->get('notification.emails');
-    $form['update_notify_emails'] = array(
+    $form['update_notify_emails'] = [
       '#type' => 'textarea',
       '#title' => t('Email addresses to notify when updates are available'),
       '#rows' => 4,
       '#default_value' => implode("\n", $notification_emails),
       '#description' => t('Whenever your site checks for available updates and finds new releases, it can notify a list of users via email. Put each address on a separate line. If blank, no emails will be sent.'),
-    );
+    ];
 
-    $form['update_notification_threshold'] = array(
+    $form['update_notification_threshold'] = [
       '#type' => 'radios',
       '#title' => t('Email notification threshold'),
       '#default_value' => $config->get('notification.threshold'),
-      '#options' => array(
+      '#options' => [
         'all' => t('All newer versions'),
         'security' => t('Only security updates'),
-      ),
-      '#description' => t('You can choose to send email only if a security update is available, or to be notified about all newer versions. If there are updates available of Drupal core or any of your installed modules and themes, your site will always print a message on the <a href=":status_report">status report</a> page, and will also display an error message on administration pages if there is a security update.', array(':status_report' => $this->url('system.status')))
-    );
+      ],
+      '#description' => t('You can choose to send email only if a security update is available, or to be notified about all newer versions. If there are updates available of Drupal core or any of your installed modules and themes, your site will always print a message on the <a href=":status_report">status report</a> page, and will also display an error message on administration pages if there is a security update.', [':status_report' => $this->url('system.status')])
+    ];
 
     return parent::buildForm($form, $form_state);
   }
@@ -105,8 +105,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
   public function validateForm(array &$form, FormStateInterface $form_state) {
     $form_state->set('notify_emails', []);
     if (!$form_state->isValueEmpty('update_notify_emails')) {
-      $valid = array();
-      $invalid = array();
+      $valid = [];
+      $invalid = [];
       foreach (explode("\n", trim($form_state->getValue('update_notify_emails'))) as $email) {
         $email = trim($email);
         if (!empty($email)) {
@@ -122,10 +122,10 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
         $form_state->set('notify_emails', $valid);
       }
       elseif (count($invalid) == 1) {
-        $form_state->setErrorByName('update_notify_emails', $this->t('%email is not a valid email address.', array('%email' => reset($invalid))));
+        $form_state->setErrorByName('update_notify_emails', $this->t('%email is not a valid email address.', ['%email' => reset($invalid)]));
       }
       else {
-        $form_state->setErrorByName('update_notify_emails', $this->t('%emails are not valid email addresses.', array('%emails' => implode(', ', $invalid))));
+        $form_state->setErrorByName('update_notify_emails', $this->t('%emails are not valid email addresses.', ['%emails' => implode(', ', $invalid)]));
       }
     }
 
diff --git a/core/modules/update/tests/modules/update_test/src/Controller/UpdateTestController.php b/core/modules/update/tests/modules/update_test/src/Controller/UpdateTestController.php
index bdf6d34356247ff02340657ad231b85562b38291..3ca46baa3c2448a599e66004b49aebe68e120c5d 100644
--- a/core/modules/update/tests/modules/update_test/src/Controller/UpdateTestController.php
+++ b/core/modules/update/tests/modules/update_test/src/Controller/UpdateTestController.php
@@ -64,7 +64,7 @@ public function updateTest($project_name, $version) {
     }
 
     $file = __DIR__ . "/../../$project_name.$availability_scenario.xml";
-    $headers = array('Content-Type' => 'text/xml; charset=utf-8');
+    $headers = ['Content-Type' => 'text/xml; charset=utf-8'];
     if (!is_file($file)) {
       // Return an empty response.
       return new Response('', 200, $headers);
diff --git a/core/modules/update/tests/modules/update_test/src/Plugin/Archiver/UpdateTestArchiver.php b/core/modules/update/tests/modules/update_test/src/Plugin/Archiver/UpdateTestArchiver.php
index a9e499a7e47938ddee305eeb4878c9b6beb9c6e0..ffa4e46d71753df0d3c8cc7ec56893ef0fd722e4 100644
--- a/core/modules/update/tests/modules/update_test/src/Plugin/Archiver/UpdateTestArchiver.php
+++ b/core/modules/update/tests/modules/update_test/src/Plugin/Archiver/UpdateTestArchiver.php
@@ -32,7 +32,7 @@ public function remove($path) {
   /**
    * {@inheritdoc}
    */
-  public function extract($path, array $files = array()) {
+  public function extract($path, array $files = []) {
     return $this;
   }
 
@@ -40,7 +40,7 @@ public function extract($path, array $files = array()) {
    * {@inheritdoc}
    */
   public function listContents() {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/update/tests/modules/update_test/src/TestFileTransferWithSettingsForm.php b/core/modules/update/tests/modules/update_test/src/TestFileTransferWithSettingsForm.php
index 5737c09cd2eaf863d3c65630545a1f178efa169f..4afcade707e0b5a85a702badf94973647c7866d1 100644
--- a/core/modules/update/tests/modules/update_test/src/TestFileTransferWithSettingsForm.php
+++ b/core/modules/update/tests/modules/update_test/src/TestFileTransferWithSettingsForm.php
@@ -29,11 +29,11 @@ public static function factory($jail, $settings) {
    * Returns a settings form with a text field to input a username.
    */
   public function getSettingsForm() {
-    $form = array();
-    $form['update_test_username'] = array(
+    $form = [];
+    $form['update_test_username'] = [
       '#type' => 'textfield',
       '#title' => t('Update Test Username'),
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/update/tests/modules/update_test/update_test.module b/core/modules/update/tests/modules/update_test/update_test.module
index 90b6cdc009d6b0ae2ad717a3e24fbde9ccf080ca..5dd207069f965a453e3028accb6513f3157fa657 100644
--- a/core/modules/update/tests/modules/update_test/update_test.module
+++ b/core/modules/update/tests/modules/update_test/update_test.module
@@ -20,7 +20,7 @@
  */
 function update_test_system_info_alter(&$info, Extension $file) {
   $setting = \Drupal::config('update_test.settings')->get('system_info');
-  foreach (array('#all', $file->getName()) as $id) {
+  foreach (['#all', $file->getName()] as $id) {
     if (!empty($setting[$id])) {
       foreach ($setting[$id] as $key => $value) {
         $info[$key] = $value;
@@ -44,7 +44,7 @@ function update_test_update_status_alter(&$projects) {
   $setting = \Drupal::config('update_test.settings')->get('update_status');
   if (!empty($setting)) {
     foreach ($projects as $project_name => &$project) {
-      foreach (array('#all', $project_name) as $id) {
+      foreach (['#all', $project_name] as $id) {
         if (!empty($setting[$id])) {
           foreach ($setting[$id] as $key => $value) {
             $project[$key] = $value;
@@ -62,11 +62,11 @@ function update_test_filetransfer_info() {
   // Define a test file transfer method, to ensure that there will always be at
   // least one method available in the user interface (regardless of the
   // environment in which the update manager tests are run).
-  return array(
-    'system_test' => array(
+  return [
+    'system_test' => [
       'title' => t('Update Test FileTransfer'),
       'class' => 'Drupal\update_test\TestFileTransferWithSettingsForm',
       'weight' => -20,
-    ),
-  );
+    ],
+  ];
 }
diff --git a/core/modules/update/tests/src/Kernel/Migrate/d6/MigrateUpdateConfigsTest.php b/core/modules/update/tests/src/Kernel/Migrate/d6/MigrateUpdateConfigsTest.php
index 62138925d806973ac3a5597a7cb6e97e8b7fedd6..aa3563c60857933737fa81d2cec16574a36e6b0f 100644
--- a/core/modules/update/tests/src/Kernel/Migrate/d6/MigrateUpdateConfigsTest.php
+++ b/core/modules/update/tests/src/Kernel/Migrate/d6/MigrateUpdateConfigsTest.php
@@ -17,7 +17,7 @@ class MigrateUpdateConfigsTest extends MigrateDrupal6TestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('update');
+  public static $modules = ['update'];
 
   /**
    * {@inheritdoc}
@@ -35,7 +35,7 @@ public function testUpdateSettings() {
     $this->assertIdentical(2, $config->get('fetch.max_attempts'));
     $this->assertIdentical('http://updates.drupal.org/release-history', $config->get('fetch.url'));
     $this->assertIdentical('all', $config->get('notification.threshold'));
-    $this->assertIdentical(array(), $config->get('notification.emails'));
+    $this->assertIdentical([], $config->get('notification.emails'));
     $this->assertIdentical(7, $config->get('check.interval_days'));
     $this->assertConfigSchema(\Drupal::service('config.typed'), 'update.settings', $config->get());
   }
diff --git a/core/modules/update/tests/src/Unit/Menu/UpdateLocalTasksTest.php b/core/modules/update/tests/src/Unit/Menu/UpdateLocalTasksTest.php
index f57997fd6a03a8c5da7df1d21c55b3b0dd4c32f7..113f006aad2d721a18d545e829b25bffc306171c 100644
--- a/core/modules/update/tests/src/Unit/Menu/UpdateLocalTasksTest.php
+++ b/core/modules/update/tests/src/Unit/Menu/UpdateLocalTasksTest.php
@@ -12,7 +12,7 @@
 class UpdateLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array('update' => 'core/modules/update');
+    $this->directoryList = ['update' => 'core/modules/update'];
     parent::setUp();
   }
 
@@ -22,20 +22,20 @@ protected function setUp() {
    * @dataProvider getUpdateReportRoutes
    */
   public function testUpdateReportLocalTasks($route) {
-    $this->assertLocalTasks($route, array(
-      0 => array('update.status', 'update.settings', 'update.report_update'),
-    ));
+    $this->assertLocalTasks($route, [
+      0 => ['update.status', 'update.settings', 'update.report_update'],
+    ]);
   }
 
   /**
    * Provides a list of report routes to test.
    */
   public function getUpdateReportRoutes() {
-    return array(
-      array('update.status'),
-      array('update.settings'),
-      array('update.report_update'),
-    );
+    return [
+      ['update.status'],
+      ['update.settings'],
+      ['update.report_update'],
+    ];
   }
 
   /**
@@ -44,9 +44,9 @@ public function getUpdateReportRoutes() {
    * @dataProvider getUpdateModuleRoutes
    */
   public function testUpdateModuleLocalTasks($route) {
-    $this->assertLocalTasks($route, array(
-      0 => array('update.module_update'),
-    ));
+    $this->assertLocalTasks($route, [
+      0 => ['update.module_update'],
+    ]);
     ;
   }
 
@@ -54,9 +54,9 @@ public function testUpdateModuleLocalTasks($route) {
    * Provides a list of module routes to test.
    */
   public function getUpdateModuleRoutes() {
-    return array(
-      array('update.module_update'),
-    );
+    return [
+      ['update.module_update'],
+    ];
   }
 
   /**
@@ -65,9 +65,9 @@ public function getUpdateModuleRoutes() {
    * @dataProvider getUpdateThemeRoutes
    */
   public function testUpdateThemeLocalTasks($route) {
-    $this->assertLocalTasks($route, array(
-      0 => array('update.theme_update'),
-    ));
+    $this->assertLocalTasks($route, [
+      0 => ['update.theme_update'],
+    ]);
     ;
   }
 
@@ -75,9 +75,9 @@ public function testUpdateThemeLocalTasks($route) {
    * Provides a list of theme routes to test.
    */
   public function getUpdateThemeRoutes() {
-    return array(
-      array('update.theme_update'),
-    );
+    return [
+      ['update.theme_update'],
+    ];
   }
 
 }
diff --git a/core/modules/update/tests/src/Unit/UpdateFetcherTest.php b/core/modules/update/tests/src/Unit/UpdateFetcherTest.php
index c203f3b52145eb71c70756a339066c26497bd50a..c3e447d1fcfbf98e8f96620da7c4a18b0a0f6c77 100644
--- a/core/modules/update/tests/src/Unit/UpdateFetcherTest.php
+++ b/core/modules/update/tests/src/Unit/UpdateFetcherTest.php
@@ -27,7 +27,7 @@ class UpdateFetcherTest extends UnitTestCase {
    * {@inheritdoc}
    */
   protected function setUp() {
-    $config_factory = $this->getConfigFactoryStub(array('update.settings' => array('fetch_url' => 'http://www.example.com')));
+    $config_factory = $this->getConfigFactoryStub(['update.settings' => ['fetch_url' => 'http://www.example.com']]);
     $http_client_mock = $this->getMock('\GuzzleHttp\ClientInterface');
     $this->updateFetcher = new UpdateFetcher($config_factory, $http_client_mock);
   }
@@ -62,25 +62,25 @@ public function testUpdateBuildFetchUrl(array $project, $site_key, $expected) {
    *   - 'expected' - The expected url from UpdateFetcher::buildFetchUrl().
    */
   public function providerTestUpdateBuildFetchUrl() {
-    $data = array();
+    $data = [];
 
     // First test that we didn't break the trivial case.
     $project['name'] = 'update_test';
     $project['project_type'] = '';
     $project['info']['version'] = '';
     $project['info']['project status url'] = 'http://www.example.com';
-    $project['includes'] = array('module1' => 'Module 1', 'module2' => 'Module 2');
+    $project['includes'] = ['module1' => 'Module 1', 'module2' => 'Module 2'];
     $site_key = '';
     $expected = 'http://www.example.com/' . $project['name'] . '/' . DRUPAL_CORE_COMPATIBILITY;
 
-    $data[] = array($project, $site_key, $expected);
+    $data[] = [$project, $site_key, $expected];
 
     // For disabled projects it shouldn't add the site key either.
     $site_key = 'site_key';
     $project['project_type'] = 'disabled';
     $expected = 'http://www.example.com/' . $project['name'] . '/' . DRUPAL_CORE_COMPATIBILITY;
 
-    $data[] = array($project, $site_key, $expected);
+    $data[] = [$project, $site_key, $expected];
 
     // For enabled projects, test adding the site key.
     $project['project_type'] = '';
@@ -88,7 +88,7 @@ public function providerTestUpdateBuildFetchUrl() {
     $expected .= '?site_key=site_key';
     $expected .= '&list=' . rawurlencode('module1,module2');
 
-    $data[] = array($project, $site_key, $expected);
+    $data[] = [$project, $site_key, $expected];
 
     // Test when the URL contains a question mark.
     $project['info']['project status url'] = 'http://www.example.com/?project=';
@@ -96,7 +96,7 @@ public function providerTestUpdateBuildFetchUrl() {
     $expected .= '&site_key=site_key';
     $expected .= '&list=' . rawurlencode('module1,module2');
 
-    $data[] = array($project, $site_key, $expected);
+    $data[] = [$project, $site_key, $expected];
 
     return $data;
   }
diff --git a/core/modules/update/update.api.php b/core/modules/update/update.api.php
index 37ef66a47439e3c0626146ec5432671ba8388649..48216eb093818ba502ac1b5bf14d266cdcf7e51b 100644
--- a/core/modules/update/update.api.php
+++ b/core/modules/update/update.api.php
@@ -40,11 +40,11 @@ function hook_update_projects_alter(&$projects) {
 
   // Add a disabled module to the list.
   // The key for the array should be the machine-readable project "short name".
-  $projects['disabled_project_name'] = array(
+  $projects['disabled_project_name'] = [
     // Machine-readable project short name (same as the array key above).
     'name' => 'disabled_project_name',
     // Array of values from the main .info.yml file for this project.
-    'info' => array(
+    'info' => [
       'name' => 'Some disabled module',
       'description' => 'A module not enabled on the site that you want to see in the available updates report.',
       'version' => '8.x-1.0',
@@ -52,7 +52,7 @@ function hook_update_projects_alter(&$projects) {
       // The maximum file change time (the "ctime" returned by the filectime()
       // PHP method) for all of the .info.yml files included in this project.
       '_info_file_ctime' => 1243888165,
-    ),
+    ],
     // The date stamp when the project was released, if known. If the disabled
     // project was an officially packaged release from drupal.org, this will
     // be included in the .info.yml file as the 'datestamp' field. This only
@@ -62,15 +62,15 @@ function hook_update_projects_alter(&$projects) {
     // Any modules (or themes) included in this project. Keyed by machine-
     // readable "short name", value is the human-readable project name printed
     // in the UI.
-    'includes' => array(
+    'includes' => [
       'disabled_project' => 'Disabled module',
       'disabled_project_helper' => 'Disabled module helper module',
       'disabled_project_foo' => 'Disabled module foo add-on module',
-    ),
+    ],
     // Does this project contain a 'module', 'theme', 'disabled-module', or
     // 'disabled-theme'?
     'project_type' => 'disabled-module',
-  );
+  ];
 }
 
 /**
@@ -92,11 +92,11 @@ function hook_update_status_alter(&$projects) {
       $projects[$project]['status'] = UPDATE_NOT_CHECKED;
       $projects[$project]['reason'] = t('Ignored from settings');
       if (!empty($settings[$project]['notes'])) {
-        $projects[$project]['extra'][] = array(
-          'class' => array('admin-note'),
+        $projects[$project]['extra'][] = [
+          'class' => ['admin-note'],
           'label' => t('Administrator note'),
           'data' => $settings[$project]['notes'],
-        );
+        ];
       }
     }
   }
@@ -120,9 +120,9 @@ function hook_update_status_alter(&$projects) {
  * @ingroup update_manager_file
  */
 function hook_verify_update_archive($project, $archive_file, $directory) {
-  $errors = array();
+  $errors = [];
   if (!file_exists($directory)) {
-    $errors[] = t('The %directory does not exist.', array('%directory' => $directory));
+    $errors[] = t('The %directory does not exist.', ['%directory' => $directory]);
   }
   // Add other checks on the archive integrity here.
   return $errors;
diff --git a/core/modules/update/update.authorize.inc b/core/modules/update/update.authorize.inc
index 58f146470335f17155cd43ef21ba0eff5a35d753..1c2cc60fb2e76c0dbbf54bc074bceef396c3421f 100644
--- a/core/modules/update/update.authorize.inc
+++ b/core/modules/update/update.authorize.inc
@@ -36,25 +36,25 @@
  *   should use that response for the current page request.
  */
 function update_authorize_run_update($filetransfer, $projects) {
-  $operations = array();
+  $operations = [];
   foreach ($projects as $project_info) {
-    $operations[] = array(
+    $operations[] = [
       'update_authorize_batch_copy_project',
-      array(
+      [
         $project_info['project'],
         $project_info['updater_name'],
         $project_info['local_url'],
         $filetransfer,
-      ),
-    );
+      ],
+    ];
   }
 
-  $batch = array(
+  $batch = [
     'init_message' => t('Preparing to update your site'),
     'operations' => $operations,
     'finished' => 'update_authorize_update_batch_finished',
     'file' => drupal_get_path('module', 'update') . '/update.authorize.inc',
-  );
+  ];
   batch_set($batch);
 
   // Since authorize.php has its own method for setting the page title, set it
@@ -91,30 +91,30 @@ function update_authorize_run_update($filetransfer, $projects) {
  *   should use that response for the current page request.
  */
 function update_authorize_run_install($filetransfer, $project, $updater_name, $local_url) {
-  $operations[] = array(
+  $operations[] = [
     'update_authorize_batch_copy_project',
-    array(
+    [
       $project,
       $updater_name,
       $local_url,
       $filetransfer,
-    ),
-  );
+    ],
+  ];
 
   // @todo Instantiate our Updater to set the human-readable title?
-  $batch = array(
+  $batch = [
     'init_message' => t('Preparing to install'),
     'operations' => $operations,
     // @todo Use a different finished callback for different messages?
     'finished' => 'update_authorize_install_batch_finished',
     'file' => drupal_get_path('module', 'update') . '/update.authorize.inc',
-  );
+  ];
   batch_set($batch);
 
   // Since authorize.php has its own method for setting the page title, set it
   // manually here rather than passing it in to batch_set() as would normally
   // be done.
-  $_SESSION['authorize_page_title'] = t('Installing %project', array('%project' => $project));
+  $_SESSION['authorize_page_title'] = t('Installing %project', ['%project' => $project]);
 
   // Invoke the batch via authorize.php.
   return system_authorized_batch_process();
@@ -142,14 +142,14 @@ function update_authorize_batch_copy_project($project, $updater_name, $local_url
 
   // Initialize some variables in the Batch API $context array.
   if (!isset($context['results']['log'])) {
-    $context['results']['log'] = array();
+    $context['results']['log'] = [];
   }
   if (!isset($context['results']['log'][$project])) {
-    $context['results']['log'][$project] = array();
+    $context['results']['log'][$project] = [];
   }
 
   if (!isset($context['results']['tasks'])) {
-    $context['results']['tasks'] = array();
+    $context['results']['tasks'] = [];
   }
 
   // The batch API uses a session, and since all the arguments are serialized
@@ -184,7 +184,7 @@ function update_authorize_batch_copy_project($project, $updater_name, $local_url
     return;
   }
 
-  _update_batch_create_message($context['results']['log'][$project], t('Installed %project_name successfully', array('%project_name' => $project)));
+  _update_batch_create_message($context['results']['log'][$project], t('Installed %project_name successfully', ['%project_name' => $project]));
   if (!empty($tasks)) {
     $context['results']['tasks'] += $tasks;
   }
@@ -221,29 +221,29 @@ function update_authorize_update_batch_finished($success, $results) {
     // Take the site out of maintenance mode if it was previously that way.
     if ($offline && isset($_SESSION['maintenance_mode']) && $_SESSION['maintenance_mode'] == FALSE) {
       \Drupal::state()->set('system.maintenance_mode', FALSE);
-      $page_message = array(
+      $page_message = [
         'message' => t('Update was completed successfully. Your site has been taken out of maintenance mode.'),
         'type' => 'status',
-      );
+      ];
     }
     else {
-      $page_message = array(
+      $page_message = [
         'message' => t('Update was completed successfully.'),
         'type' => 'status',
-      );
+      ];
     }
   }
   elseif (!$offline) {
-    $page_message = array(
+    $page_message = [
       'message' => t('Update failed! See the log below for more information.'),
       'type' => 'error',
-    );
+    ];
   }
   else {
-    $page_message = array(
+    $page_message = [
       'message' => t('Update failed! See the log below for more information. Your site is still in maintenance mode.'),
       'type' => 'error',
-    );
+    ];
   }
   // Since we're doing an update of existing code, always add a task for
   // running update.php.
@@ -300,29 +300,29 @@ function update_authorize_install_batch_finished($success, $results) {
     // Take the site out of maintenance mode if it was previously that way.
     if ($offline && isset($_SESSION['maintenance_mode']) && $_SESSION['maintenance_mode'] == FALSE) {
       \Drupal::state()->set('system.maintenance_mode', FALSE);
-      $page_message = array(
+      $page_message = [
         'message' => t('Installation was completed successfully. Your site has been taken out of maintenance mode.'),
         'type' => 'status',
-      );
+      ];
     }
     else {
-      $page_message = array(
+      $page_message = [
         'message' => t('Installation was completed successfully.'),
         'type' => 'status',
-      );
+      ];
     }
   }
   elseif (!$success && !$offline) {
-    $page_message = array(
+    $page_message = [
       'message' => t('Installation failed! See the log below for more information.'),
       'type' => 'error',
-    );
+    ];
   }
   else {
-    $page_message = array(
+    $page_message = [
       'message' => t('Installation failed! See the log below for more information. Your site is still in maintenance mode.'),
       'type' => 'error',
-    );
+    ];
   }
 
   // Unset the variable since it is no longer needed.
@@ -348,7 +348,7 @@ function update_authorize_install_batch_finished($success, $results) {
  *   if there were errors. Defaults to TRUE.
  */
 function _update_batch_create_message(&$project_results, $message, $success = TRUE) {
-  $project_results[] = array('message' => $message, 'success' => $success);
+  $project_results[] = ['message' => $message, 'success' => $success];
 }
 
 /**
diff --git a/core/modules/update/update.compare.inc b/core/modules/update/update.compare.inc
index a077c38d2f184696f96f04a4c277cd13a22cfb4a..2ba5fdce75a7a7a6ff77e54c1e86692af75308f7 100644
--- a/core/modules/update/update.compare.inc
+++ b/core/modules/update/update.compare.inc
@@ -32,7 +32,7 @@ function update_process_project_info(&$projects) {
       // Figure out what the currently installed major version is. We need
       // to handle both contribution (e.g. "5.x-1.3", major = 1) and core
       // (e.g. "5.1", major = 5) version strings.
-      $matches = array();
+      $matches = [];
       if (preg_match('/^(\d+\.x-)?(\d+)\..*$/', $info['version'], $matches)) {
         $info['major'] = $matches[2];
       }
@@ -171,7 +171,7 @@ function update_calculate_project_data($available) {
  *   Data about available project releases of a specific project.
  */
 function update_calculate_project_update_status(&$project_data, $available) {
-  foreach (array('title', 'link') as $attribute) {
+  foreach (['title', 'link'] as $attribute) {
     if (!isset($project_data[$attribute]) && isset($available[$attribute])) {
       $project_data[$attribute] = $available[$attribute];
     }
@@ -184,33 +184,33 @@ function update_calculate_project_update_status(&$project_data, $available) {
       case 'insecure':
         $project_data['status'] = UPDATE_NOT_SECURE;
         if (empty($project_data['extra'])) {
-          $project_data['extra'] = array();
+          $project_data['extra'] = [];
         }
-        $project_data['extra'][] = array(
+        $project_data['extra'][] = [
           'label' => t('Project not secure'),
           'data' => t('This project has been labeled insecure by the Drupal security team, and is no longer available for download. Immediately disabling everything included by this project is strongly recommended!'),
-        );
+        ];
         break;
       case 'unpublished':
       case 'revoked':
         $project_data['status'] = UPDATE_REVOKED;
         if (empty($project_data['extra'])) {
-          $project_data['extra'] = array();
+          $project_data['extra'] = [];
         }
-        $project_data['extra'][] = array(
+        $project_data['extra'][] = [
           'label' => t('Project revoked'),
           'data' => t('This project has been revoked, and is no longer available for download. Disabling everything included by this project is strongly recommended!'),
-        );
+        ];
         break;
       case 'unsupported':
         $project_data['status'] = UPDATE_NOT_SUPPORTED;
         if (empty($project_data['extra'])) {
-          $project_data['extra'] = array();
+          $project_data['extra'] = [];
         }
-        $project_data['extra'][] = array(
+        $project_data['extra'][] = [
           'label' => t('Project not supported'),
           'data' => t('This project is no longer supported, and is no longer available for download. Disabling everything included by this project is strongly recommended!'),
-        );
+        ];
         break;
       case 'not-fetched':
         $project_data['status'] = UPDATE_NOT_FETCHED;
@@ -233,7 +233,7 @@ function update_calculate_project_update_status(&$project_data, $available) {
 
   // Figure out the target major version.
   $existing_major = $project_data['existing_major'];
-  $supported_majors = array();
+  $supported_majors = [];
   if (isset($available['supported_majors'])) {
     $supported_majors = explode(',', $available['supported_majors']);
   }
@@ -303,25 +303,25 @@ function update_calculate_project_update_status(&$project_data, $available) {
       elseif ($release['status'] == 'unpublished') {
         $project_data['status'] = UPDATE_REVOKED;
         if (empty($project_data['extra'])) {
-          $project_data['extra'] = array();
+          $project_data['extra'] = [];
         }
-        $project_data['extra'][] = array(
-          'class' => array('release-revoked'),
+        $project_data['extra'][] = [
+          'class' => ['release-revoked'],
           'label' => t('Release revoked'),
           'data' => t('Your currently installed release has been revoked, and is no longer available for download. Disabling everything included in this release or upgrading is strongly recommended!'),
-        );
+        ];
       }
       elseif (isset($release['terms']['Release type']) &&
               in_array('Unsupported', $release['terms']['Release type'])) {
         $project_data['status'] = UPDATE_NOT_SUPPORTED;
         if (empty($project_data['extra'])) {
-          $project_data['extra'] = array();
+          $project_data['extra'] = [];
         }
-        $project_data['extra'][] = array(
-          'class' => array('release-not-supported'),
+        $project_data['extra'][] = [
+          'class' => ['release-not-supported'],
           'label' => t('Release not supported'),
           'data' => t('Your currently installed release is now unsupported, and is no longer available for download. Disabling everything included in this release or upgrading is strongly recommended!'),
-        );
+        ];
       }
     }
 
@@ -341,7 +341,7 @@ function update_calculate_project_update_status(&$project_data, $available) {
     if (isset($release['version_major']) && $release['version_major'] > $target_major) {
       if (in_array($release['version_major'], $supported_majors)) {
         if (!isset($project_data['also'])) {
-          $project_data['also'] = array();
+          $project_data['also'] = [];
         }
         if (!isset($project_data['also'][$release['version_major']])) {
           $project_data['also'][$release['version_major']] = $version;
diff --git a/core/modules/update/update.fetch.inc b/core/modules/update/update.fetch.inc
index a710dd9f7a75724d1ed87ecb32d6e364455ce4fc..9964910b17e0faba1a76d452f3dd8230c3cb932b 100644
--- a/core/modules/update/update.fetch.inc
+++ b/core/modules/update/update.fetch.inc
@@ -18,9 +18,9 @@ function _update_cron_notify() {
   $update_config = \Drupal::config('update.settings');
   module_load_install('update');
   $status = update_requirements('runtime');
-  $params = array();
+  $params = [];
   $notify_all = ($update_config->get('notification.threshold') == 'all');
-  foreach (array('core', 'contrib') as $report_type) {
+  foreach (['core', 'contrib'] as $report_type) {
     $type = 'update_' . $report_type;
     if (isset($status[$type]['severity'])
         && ($status[$type]['severity'] == REQUIREMENT_ERROR || ($notify_all && $status[$type]['reason'] == UPDATE_NOT_CURRENT))) {
diff --git a/core/modules/update/update.install b/core/modules/update/update.install
index e8101295c1e22602c73a1cd351965a395949af6f..d76d09e95eafb1bab18527802af94629945efacb 100644
--- a/core/modules/update/update.install
+++ b/core/modules/update/update.install
@@ -28,7 +28,7 @@
  * @see _update_cron_notify()
  */
 function update_requirements($phase) {
-  $requirements = array();
+  $requirements = [];
   if ($phase == 'runtime') {
     if ($available = update_get_available(FALSE)) {
       module_load_include('inc', 'update', 'update.compare');
@@ -97,7 +97,7 @@ function update_uninstall() {
  * @see update_calculate_project_data()
  */
 function _update_requirement_check($project, $type) {
-  $requirement = array();
+  $requirement = [];
   if ($type == 'core') {
     $requirement['title'] = t('Drupal core update status');
   }
@@ -143,7 +143,7 @@ function _update_requirement_check($project, $type) {
       $requirement_label = t('Up to date');
   }
   if ($status != UPDATE_CURRENT && $type == 'core' && isset($project['recommended'])) {
-    $requirement_label .= ' ' . t('(version @version available)', array('@version' => $project['recommended']));
+    $requirement_label .= ' ' . t('(version @version available)', ['@version' => $project['recommended']]);
   }
   $requirement['value'] = \Drupal::l($requirement_label, new Url(_update_manager_access() ? 'update.report_update' : 'update.status'));
   return $requirement;
diff --git a/core/modules/update/update.manager.inc b/core/modules/update/update.manager.inc
index f9c7c5f3f42d083ad32982efc38858d791601b59..541ab6f34a85b2c92fbef3cc151762b52f8ace73 100644
--- a/core/modules/update/update.manager.inc
+++ b/core/modules/update/update.manager.inc
@@ -48,11 +48,11 @@
  */
 function update_manager_download_batch_finished($success, $results) {
   if (!empty($results['errors'])) {
-    $item_list = array(
+    $item_list = [
       '#theme' => 'item_list',
       '#title' => t('Downloading updates failed:'),
       '#items' => $results['errors'],
-    );
+    ];
     drupal_set_message(drupal_render($item_list), 'error');
   }
   elseif ($success) {
@@ -91,23 +91,23 @@ function _update_manager_check_backends(&$form, $operation) {
   }
 
   // Otherwise, show the available backends.
-  $form['available_backends'] = array(
+  $form['available_backends'] = [
     '#prefix' => '<p>',
     '#suffix' => '</p>',
-  );
+  ];
 
   $available_backends = drupal_get_filetransfer_info();
   if (empty($available_backends)) {
     if ($operation == 'update') {
-      $form['available_backends']['#markup'] = t('Your server does not support updating modules and themes from this interface. Instead, update modules and themes by uploading the new versions directly to the server, as described in the <a href=":handbook_url">handbook</a>.', array(':handbook_url' => 'https://www.drupal.org/getting-started/install-contrib'));
+      $form['available_backends']['#markup'] = t('Your server does not support updating modules and themes from this interface. Instead, update modules and themes by uploading the new versions directly to the server, as described in the <a href=":handbook_url">handbook</a>.', [':handbook_url' => 'https://www.drupal.org/getting-started/install-contrib']);
     }
     else {
-      $form['available_backends']['#markup'] = t('Your server does not support installing modules and themes from this interface. Instead, install modules and themes by uploading them directly to the server, as described in the <a href=":handbook_url">handbook</a>.', array(':handbook_url' => 'https://www.drupal.org/getting-started/install-contrib'));
+      $form['available_backends']['#markup'] = t('Your server does not support installing modules and themes from this interface. Instead, install modules and themes by uploading them directly to the server, as described in the <a href=":handbook_url">handbook</a>.', [':handbook_url' => 'https://www.drupal.org/getting-started/install-contrib']);
     }
     return FALSE;
   }
 
-  $backend_names = array();
+  $backend_names = [];
   foreach ($available_backends as $backend) {
     $backend_names[] = $backend['title'];
   }
@@ -116,20 +116,20 @@ function _update_manager_check_backends(&$form, $operation) {
       count($available_backends),
       'Updating modules and themes requires <strong>@backends access</strong> to your server. See the <a href=":handbook_url">handbook</a> for other update methods.',
       'Updating modules and themes requires access to your server via one of the following methods: <strong>@backends</strong>. See the <a href=":handbook_url">handbook</a> for other update methods.',
-      array(
+      [
         '@backends' => implode(', ', $backend_names),
         ':handbook_url' => 'https://www.drupal.org/getting-started/install-contrib',
-      ));
+      ]);
   }
   else {
     $form['available_backends']['#markup'] = \Drupal::translation()->formatPlural(
       count($available_backends),
       'Installing modules and themes requires <strong>@backends access</strong> to your server. See the <a href=":handbook_url">handbook</a> for other installation methods.',
       'Installing modules and themes requires access to your server via one of the following methods: <strong>@backends</strong>. See the <a href=":handbook_url">handbook</a> for other installation methods.',
-      array(
+      [
         '@backends' => implode(', ', $backend_names),
         ':handbook_url' => 'https://www.drupal.org/getting-started/install-contrib',
-      ));
+      ]);
   }
   return TRUE;
 }
@@ -150,7 +150,7 @@ function _update_manager_check_backends(&$form, $operation) {
 function update_manager_archive_extract($file, $directory) {
   $archiver = archiver_get_archiver($file);
   if (!$archiver) {
-    throw new Exception(t('Cannot extract %file, not a valid archive.', array ('%file' => $file)));
+    throw new Exception(t('Cannot extract %file, not a valid archive.',  ['%file' => $file]));
   }
 
   // Remove the directory if it exists, otherwise it might contain a mixture of
@@ -189,7 +189,7 @@ function update_manager_archive_extract($file, $directory) {
  *   are no errors, it will be an empty array.
  */
 function update_manager_archive_verify($project, $archive_file, $directory) {
-  return \Drupal::moduleHandler()->invokeAll('verify_update_archive', array($project, $archive_file, $directory));
+  return \Drupal::moduleHandler()->invokeAll('verify_update_archive', [$project, $archive_file, $directory]);
 }
 
 /**
@@ -205,7 +205,7 @@ function update_manager_archive_verify($project, $archive_file, $directory) {
  */
 function update_manager_file_get($url) {
   $parsed_url = parse_url($url);
-  $remote_schemes = array('http', 'https', 'ftp', 'ftps', 'smb', 'nfs');
+  $remote_schemes = ['http', 'https', 'ftp', 'ftps', 'smb', 'nfs'];
   if (!isset($parsed_url['scheme']) || !in_array($parsed_url['scheme'], $remote_schemes)) {
     // This is a local file, just return the path.
     return drupal_realpath($url);
@@ -245,14 +245,14 @@ function update_manager_batch_project_get($project, $url, &$context) {
   // This is here to show the user that we are in the process of downloading.
   if (!isset($context['sandbox']['started'])) {
     $context['sandbox']['started'] = TRUE;
-    $context['message'] = t('Downloading %project', array('%project' => $project));
+    $context['message'] = t('Downloading %project', ['%project' => $project]);
     $context['finished'] = 0;
     return;
   }
 
   // Actually try to download the file.
   if (!($local_cache = update_manager_file_get($url))) {
-    $context['results']['errors'][$project] = t('Failed to download %project from %url', array('%project' => $project, '%url' => $url));
+    $context['results']['errors'][$project] = t('Failed to download %project from %url', ['%project' => $project, '%url' => $url]);
     return;
   }
 
diff --git a/core/modules/update/update.module b/core/modules/update/update.module
index 6ef4628210ad69dc2802b74dd848143db13003cd..32b5b8cc8779488712b4f4c41f0861d187ea5990 100644
--- a/core/modules/update/update.module
+++ b/core/modules/update/update.module
@@ -98,7 +98,7 @@ function update_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.update':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Update Manager module periodically checks for new versions of your site\'s software (including contributed modules and themes), and alerts administrators to available updates. The Update Manager system is also used by some other modules to manage updates and downloads; for example, the Interface Translation module uses the Update Manager to download translations from the localization server. Note that whenever the Update Manager system is used, anonymous usage statistics are sent to Drupal.org. If desired, you may disable the Update Manager module from the <a href=":modules">Extend page</a>; if you do so, functionality that depends on the Update Manager system will not work. For more information, see the <a href=":update">online documentation for the Update Manager module</a>.', array(':update' => 'https://www.drupal.org/documentation/modules/update', ':modules' => \Drupal::url('system.modules_list'))) . '</p>';
+      $output .= '<p>' . t('The Update Manager module periodically checks for new versions of your site\'s software (including contributed modules and themes), and alerts administrators to available updates. The Update Manager system is also used by some other modules to manage updates and downloads; for example, the Interface Translation module uses the Update Manager to download translations from the localization server. Note that whenever the Update Manager system is used, anonymous usage statistics are sent to Drupal.org. If desired, you may disable the Update Manager module from the <a href=":modules">Extend page</a>; if you do so, functionality that depends on the Update Manager system will not work. For more information, see the <a href=":update">online documentation for the Update Manager module</a>.', [':update' => 'https://www.drupal.org/documentation/modules/update', ':modules' => \Drupal::url('system.modules_list')]) . '</p>';
       // Only explain the Update manager if it has not been disabled.
       if (_update_manager_access()) {
         $output .= '<p>' . t('The Update Manager also allows administrators to update and install modules and themes through the administration interface.') . '</p>';
@@ -106,13 +106,13 @@ function update_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Checking for available updates') . '</dt>';
-      $output .= '<dd>' . t('The <a href=":update-report">Available updates report</a> displays core, contributed modules, and themes for which there are new releases available for download. On the report page, you can also check manually for updates. You can configure the frequency of update checks, which are performed during cron runs, and whether notifications are sent on the <a href=":update-settings">Update Manager settings page</a>.', array(':update-report' => \Drupal::url('update.status'), ':update-settings' => \Drupal::url('update.settings'))) . '</dd>';
+      $output .= '<dd>' . t('The <a href=":update-report">Available updates report</a> displays core, contributed modules, and themes for which there are new releases available for download. On the report page, you can also check manually for updates. You can configure the frequency of update checks, which are performed during cron runs, and whether notifications are sent on the <a href=":update-settings">Update Manager settings page</a>.', [':update-report' => \Drupal::url('update.status'), ':update-settings' => \Drupal::url('update.settings')]) . '</dd>';
       // Only explain the Update manager if it has not been disabled.
       if (_update_manager_access()) {
         $output .= '<dt>' . t('Performing updates through the Update page') . '</dt>';
-        $output .= '<dd>' . t('The Update Manager module allows administrators to perform updates directly from the <a href=":update-page">Update page</a>. It lists all available updates, and you can confirm whether you want to download them. If you don\'t have sufficient access rights to your web server, you could be prompted for your FTP/SSH password. Afterwards the files are transferred into your site installation, overwriting your old files. Direct links to the Update page are also displayed on the <a href=":modules_page">Extend page</a> and the <a href=":themes_page">Appearance page</a>.', array(':modules_page' => \Drupal::url('system.modules_list'), ':themes_page' => \Drupal::url('system.themes_page'), ':update-page' => \Drupal::url('update.report_update'))) . '</dd>';
+        $output .= '<dd>' . t('The Update Manager module allows administrators to perform updates directly from the <a href=":update-page">Update page</a>. It lists all available updates, and you can confirm whether you want to download them. If you don\'t have sufficient access rights to your web server, you could be prompted for your FTP/SSH password. Afterwards the files are transferred into your site installation, overwriting your old files. Direct links to the Update page are also displayed on the <a href=":modules_page">Extend page</a> and the <a href=":themes_page">Appearance page</a>.', [':modules_page' => \Drupal::url('system.modules_list'), ':themes_page' => \Drupal::url('system.themes_page'), ':update-page' => \Drupal::url('update.report_update')]) . '</dd>';
         $output .= '<dt>' . t('Installing new modules and themes through the Install page') . '</dt>';
-        $output .= '<dd>' . t('You can also install new modules and themes in the same fashion, through the <a href=":install">Install page</a>, or by clicking the <em>Install new module/theme</em> links at the top of the <a href=":modules_page">Extend page</a> and the <a href=":themes_page">Appearance page</a>. In this case, you are prompted to provide either the URL to the download, or to upload a packaged release file from your local computer.', array(':modules_page' => \Drupal::url('system.modules_list'), ':themes_page' => \Drupal::url('system.themes_page'), ':install' => \Drupal::url('update.report_install'))) . '</dd>';
+        $output .= '<dd>' . t('You can also install new modules and themes in the same fashion, through the <a href=":install">Install page</a>, or by clicking the <em>Install new module/theme</em> links at the top of the <a href=":modules_page">Extend page</a> and the <a href=":themes_page">Appearance page</a>. In this case, you are prompted to provide either the URL to the download, or to upload a packaged release file from your local computer.', [':modules_page' => \Drupal::url('system.modules_list'), ':themes_page' => \Drupal::url('system.themes_page'), ':install' => \Drupal::url('update.report_install')]) . '</dd>';
       }
       $output .= '</dl>';
       return $output;
@@ -122,10 +122,10 @@ function update_help($route_name, RouteMatchInterface $route_match) {
 
     case 'system.modules_list':
       if (_update_manager_access()) {
-        $output = '<p>' . t('Regularly review and install <a href=":updates">available updates</a> to maintain a secure and current site. Always run the <a href=":update-php">update script</a> each time a module is updated.', array(':update-php' => \Drupal::url('system.db_update'), ':updates' => \Drupal::url('update.status'))) . '</p>';
+        $output = '<p>' . t('Regularly review and install <a href=":updates">available updates</a> to maintain a secure and current site. Always run the <a href=":update-php">update script</a> each time a module is updated.', [':update-php' => \Drupal::url('system.db_update'), ':updates' => \Drupal::url('update.status')]) . '</p>';
       }
       else {
-        $output = '<p>' . t('Regularly review <a href=":updates">available updates</a> to maintain a secure and current site. Always run the <a href=":update-php">update script</a> each time a module is updated.', array(':update-php' => \Drupal::url('system.db_update'), ':updates' => \Drupal::url('update.status'))) . '</p>';
+        $output = '<p>' . t('Regularly review <a href=":updates">available updates</a> to maintain a secure and current site. Always run the <a href=":update-php">update script</a> each time a module is updated.', [':update-php' => \Drupal::url('system.db_update'), ':updates' => \Drupal::url('update.status')]) . '</p>';
       }
       return $output;
   }
@@ -164,7 +164,7 @@ function update_page_top() {
     }
     module_load_install('update');
     $status = update_requirements('runtime');
-    foreach (array('core', 'contrib') as $report_type) {
+    foreach (['core', 'contrib'] as $report_type) {
       $type = 'update_' . $report_type;
       // hook_requirements() supports render arrays therefore we need to render
       // them before using drupal_set_message().
@@ -212,25 +212,25 @@ function _update_manager_access() {
  * Implements hook_theme().
  */
 function update_theme() {
-  return array(
-    'update_last_check' => array(
-      'variables' => array('last' => 0),
-    ),
-    'update_report' => array(
-      'variables' => array('data' => NULL),
+  return [
+    'update_last_check' => [
+      'variables' => ['last' => 0],
+    ],
+    'update_report' => [
+      'variables' => ['data' => NULL],
       'file' => 'update.report.inc',
-    ),
-    'update_project_status' => array(
-      'variables' => array('project' => array()),
+    ],
+    'update_project_status' => [
+      'variables' => ['project' => []],
       'file' => 'update.report.inc',
-    ),
+    ],
     // We are using template instead of '#type' => 'table' here to keep markup
     // out of preprocess and allow for easier changes to markup.
-    'update_version' => array(
-      'variables' => array('version' => NULL, 'title' => NULL, 'attributes' => array()),
+    'update_version' => [
+      'variables' => ['version' => NULL, 'title' => NULL, 'attributes' => []],
       'file' => 'update.report.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -312,10 +312,10 @@ function update_storage_clear_submit($form, FormStateInterface $form_state) {
  */
 function _update_no_data() {
   $destination = \Drupal::destination()->getAsArray();
-  return t('No update information available. <a href=":run_cron">Run cron</a> or <a href=":check_manually">check manually</a>.', array(
+  return t('No update information available. <a href=":run_cron">Run cron</a> or <a href=":check_manually">check manually</a>.', [
     ':run_cron' => \Drupal::url('system.run_cron', [], ['query' => $destination]),
     ':check_manually' => \Drupal::url('update.manual_status', [], ['query' => $destination]),
-  ));
+  ]);
 }
 
 /**
@@ -471,20 +471,20 @@ function update_fetch_data_finished($success, $results) {
 function update_mail($key, &$message, $params) {
   $langcode = $message['langcode'];
   $language = \Drupal::languageManager()->getLanguage($langcode);
-  $message['subject'] .= t('New release(s) available for @site_name', array('@site_name' => \Drupal::config('system.site')->get('name')), array('langcode' => $langcode));
+  $message['subject'] .= t('New release(s) available for @site_name', ['@site_name' => \Drupal::config('system.site')->get('name')], ['langcode' => $langcode]);
   foreach ($params as $msg_type => $msg_reason) {
     $message['body'][] = _update_message_text($msg_type, $msg_reason, $langcode);
   }
-  $message['body'][] = t('See the available updates page for more information:', array(), array('langcode' => $langcode)) . "\n" . \Drupal::url('update.status', [], ['absolute' => TRUE, 'language' => $language]);
+  $message['body'][] = t('See the available updates page for more information:', [], ['langcode' => $langcode]) . "\n" . \Drupal::url('update.status', [], ['absolute' => TRUE, 'language' => $language]);
   if (_update_manager_access()) {
-    $message['body'][] = t('You can automatically install your missing updates using the Update manager:', array(), array('langcode' => $langcode)) . "\n" . \Drupal::url('update.report_update', [], ['absolute' => TRUE, 'language' => $language]);
+    $message['body'][] = t('You can automatically install your missing updates using the Update manager:', [], ['langcode' => $langcode]) . "\n" . \Drupal::url('update.report_update', [], ['absolute' => TRUE, 'language' => $language]);
   }
   $settings_url = \Drupal::url('update.settings', [], ['absolute' => TRUE]);
   if (\Drupal::config('update.settings')->get('notification.threshold') == 'all') {
-    $message['body'][] = t('Your site is currently configured to send these emails when any updates are available. To get notified only for security updates, @url.', array('@url' => $settings_url));
+    $message['body'][] = t('Your site is currently configured to send these emails when any updates are available. To get notified only for security updates, @url.', ['@url' => $settings_url]);
   }
   else {
-    $message['body'][] = t('Your site is currently configured to send these emails only when security updates are available. To get notified for any available updates, @url.', array('@url' => $settings_url));
+    $message['body'][] = t('Your site is currently configured to send these emails only when security updates are available. To get notified for any available updates, @url.', ['@url' => $settings_url]);
   }
 }
 
@@ -511,37 +511,37 @@ function _update_message_text($msg_type, $msg_reason, $langcode = NULL) {
   switch ($msg_reason) {
     case UPDATE_NOT_SECURE:
       if ($msg_type == 'core') {
-        $text = t('There is a security update available for your version of Drupal. To ensure the security of your server, you should update immediately!', array(), array('langcode' => $langcode));
+        $text = t('There is a security update available for your version of Drupal. To ensure the security of your server, you should update immediately!', [], ['langcode' => $langcode]);
       }
       else {
-        $text = t('There are security updates available for one or more of your modules or themes. To ensure the security of your server, you should update immediately!', array(), array('langcode' => $langcode));
+        $text = t('There are security updates available for one or more of your modules or themes. To ensure the security of your server, you should update immediately!', [], ['langcode' => $langcode]);
       }
       break;
 
     case UPDATE_REVOKED:
       if ($msg_type == 'core') {
-        $text = t('Your version of Drupal has been revoked and is no longer available for download. Upgrading is strongly recommended!', array(), array('langcode' => $langcode));
+        $text = t('Your version of Drupal has been revoked and is no longer available for download. Upgrading is strongly recommended!', [], ['langcode' => $langcode]);
       }
       else {
-        $text = t('The installed version of at least one of your modules or themes has been revoked and is no longer available for download. Upgrading or disabling is strongly recommended!', array(), array('langcode' => $langcode));
+        $text = t('The installed version of at least one of your modules or themes has been revoked and is no longer available for download. Upgrading or disabling is strongly recommended!', [], ['langcode' => $langcode]);
       }
       break;
 
     case UPDATE_NOT_SUPPORTED:
       if ($msg_type == 'core') {
-        $text = t('Your version of Drupal is no longer supported. Upgrading is strongly recommended!', array(), array('langcode' => $langcode));
+        $text = t('Your version of Drupal is no longer supported. Upgrading is strongly recommended!', [], ['langcode' => $langcode]);
       }
       else {
-        $text = t('The installed version of at least one of your modules or themes is no longer supported. Upgrading or disabling is strongly recommended. See the project homepage for more details.', array(), array('langcode' => $langcode));
+        $text = t('The installed version of at least one of your modules or themes is no longer supported. Upgrading or disabling is strongly recommended. See the project homepage for more details.', [], ['langcode' => $langcode]);
       }
       break;
 
     case UPDATE_NOT_CURRENT:
       if ($msg_type == 'core') {
-        $text = t('There are updates available for your version of Drupal. To ensure the proper functioning of your site, you should update as soon as possible.', array(), array('langcode' => $langcode));
+        $text = t('There are updates available for your version of Drupal. To ensure the proper functioning of your site, you should update as soon as possible.', [], ['langcode' => $langcode]);
       }
       else {
-        $text = t('There are updates available for one or more of your modules or themes. To ensure the proper functioning of your site, you should update as soon as possible.', array(), array('langcode' => $langcode));
+        $text = t('There are updates available for one or more of your modules or themes. To ensure the proper functioning of your site, you should update as soon as possible.', [], ['langcode' => $langcode]);
       }
       break;
 
@@ -550,10 +550,10 @@ function _update_message_text($msg_type, $msg_reason, $langcode = NULL) {
     case UPDATE_NOT_FETCHED:
     case UPDATE_FETCH_PENDING:
       if ($msg_type == 'core') {
-        $text = t('There was a problem checking <a href=":update-report">available updates</a> for Drupal.', array(':update-report' => \Drupal::url('update.status')), array('langcode' => $langcode));
+        $text = t('There was a problem checking <a href=":update-report">available updates</a> for Drupal.', [':update-report' => \Drupal::url('update.status')], ['langcode' => $langcode]);
       }
       else {
-        $text = t('There was a problem checking <a href=":update-report">available updates</a> for your modules or themes.', array(':update-report' => \Drupal::url('update.status')), array('langcode' => $langcode));
+        $text = t('There was a problem checking <a href=":update-report">available updates</a> for your modules or themes.', [':update-report' => \Drupal::url('update.status')], ['langcode' => $langcode]);
       }
       break;
   }
@@ -593,7 +593,7 @@ function _update_project_status_sort($a, $b) {
  */
 function template_preprocess_update_last_check(&$variables) {
   $variables['time'] = \Drupal::service('date.formatter')->formatTimeDiffSince($variables['last']);
-  $variables['link'] = \Drupal::l(t('Check manually'), new Url('update.manual_status', array(), array('query' => \Drupal::destination()->getAsArray())));
+  $variables['link'] = \Drupal::l(t('Check manually'), new Url('update.manual_status', [], ['query' => \Drupal::destination()->getAsArray()]));
 }
 
 /**
@@ -610,7 +610,7 @@ function template_preprocess_update_last_check(&$variables) {
  * @see _system_rebuild_module_data()
  */
 function update_verify_update_archive($project, $archive_file, $directory) {
-  $errors = array();
+  $errors = [];
 
   // Make sure this isn't a tarball of Drupal core.
   if (
@@ -620,9 +620,9 @@ function update_verify_update_archive($project, $archive_file, $directory) {
     && file_exists("$directory/$project/core/modules/node/node.module")
     && file_exists("$directory/$project/core/modules/system/system.module")
   ) {
-    return array(
-      'no-core' => t('Automatic updating of Drupal core is not supported. See the <a href=":upgrade-guide">upgrade guide</a> for information on how to update Drupal core manually.', array(':upgrade-guide' => 'https://www.drupal.org/upgrade')),
-    );
+    return [
+      'no-core' => t('Automatic updating of Drupal core is not supported. See the <a href=":upgrade-guide">upgrade guide</a> for information on how to update Drupal core manually.', [':upgrade-guide' => 'https://www.drupal.org/upgrade']),
+    ];
   }
 
   // Parse all the .info.yml files and make sure at least one is compatible with
@@ -631,8 +631,8 @@ function update_verify_update_archive($project, $archive_file, $directory) {
   // with some out-of-date modules that are not necessary for its overall
   // functionality).
   $compatible_project = FALSE;
-  $incompatible = array();
-  $files = file_scan_directory("$directory/$project", '/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.info.yml$/', array('key' => 'name', 'min_depth' => 0));
+  $incompatible = [];
+  $files = file_scan_directory("$directory/$project", '/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.info.yml$/', ['key' => 'name', 'min_depth' => 0]);
   foreach ($files as $file) {
     // Get the .info.yml file for the module or theme this file belongs to.
     $info = \Drupal::service('info_parser')->parse($file->uri);
@@ -648,14 +648,14 @@ function update_verify_update_archive($project, $archive_file, $directory) {
   }
 
   if (empty($files)) {
-    $errors[] = t('%archive_file does not contain any .info.yml files.', array('%archive_file' => drupal_basename($archive_file)));
+    $errors[] = t('%archive_file does not contain any .info.yml files.', ['%archive_file' => drupal_basename($archive_file)]);
   }
   elseif (!$compatible_project) {
     $errors[] = \Drupal::translation()->formatPlural(
       count($incompatible),
       '%archive_file contains a version of %names that is not compatible with Drupal @version.',
       '%archive_file contains versions of modules or themes that are not compatible with Drupal @version: %names',
-      array('@version' => \Drupal::CORE_COMPATIBILITY, '%archive_file' => drupal_basename($archive_file), '%names' => implode(', ', $incompatible))
+      ['@version' => \Drupal::CORE_COMPATIBILITY, '%archive_file' => drupal_basename($archive_file), '%names' => implode(', ', $incompatible)]
     );
   }
 
@@ -734,14 +734,14 @@ function _update_manager_cache_directory($create = TRUE) {
 function update_clear_update_disk_cache() {
   // List of update module cache directories. Do not create the directories if
   // they do not exist.
-  $directories = array(
+  $directories = [
     _update_manager_cache_directory(FALSE),
     _update_manager_extract_directory(FALSE),
-  );
+  ];
 
   // Search for files and directories in base folder only without recursion.
   foreach ($directories as $directory) {
-    file_scan_directory($directory, '/.*/', array('callback' => 'update_delete_file_if_stale', 'recurse' => FALSE));
+    file_scan_directory($directory, '/.*/', ['callback' => 'update_delete_file_if_stale', 'recurse' => FALSE]);
   }
 }
 
diff --git a/core/modules/update/update.report.inc b/core/modules/update/update.report.inc
index 5f198d9ba95f8023a18aa0d5901d8b4a4000efe8..7b14a0585258a574361df56a037290a045f5de14 100644
--- a/core/modules/update/update.report.inc
+++ b/core/modules/update/update.report.inc
@@ -23,36 +23,36 @@ function template_preprocess_update_report(&$variables) {
 
   $last = \Drupal::state()->get('update.last_check') ?: 0;
 
-  $variables['last_checked'] = array(
+  $variables['last_checked'] = [
     '#theme' => 'update_last_check',
     '#last' => $last,
     // Attach the library to a variable that gets printed always.
-    '#attached' => array(
-      'library' => array(
+    '#attached' => [
+      'library' => [
         'update/drupal.update.admin',
-      ),
-    )
-  );
+      ],
+    ]
+  ];
 
   // For no project update data, populate no data message.
   if (empty($data)) {
     $variables['no_updates_message'] = _update_no_data();
   }
 
-  $rows = array();
+  $rows = [];
 
   foreach ($data as $project) {
-    $project_status = array(
+    $project_status = [
       '#theme' => 'update_project_status',
       '#project' => $project,
-    );
+    ];
 
     // Build project rows.
     if (!isset($rows[$project['project_type']])) {
-      $rows[$project['project_type']] = array(
+      $rows[$project['project_type']] = [
         '#type' => 'table',
-        '#attributes' => array('class' => array('update')),
-      );
+        '#attributes' => ['class' => ['update']],
+      ];
     }
     $row_key = !empty($project['title']) ? Unicode::strtolower($project['title']) : Unicode::strtolower($project['name']);
 
@@ -62,7 +62,7 @@ function template_preprocess_update_report(&$variables) {
     // Add project status class attribute to the table row.
     switch ($project['status']) {
       case UPDATE_CURRENT:
-        $rows[$project['project_type']][$row_key]['#attributes'] = array('class' => array('color-success'));
+        $rows[$project['project_type']][$row_key]['#attributes'] = ['class' => ['color-success']];
         break;
       case UPDATE_UNKNOWN:
       case UPDATE_FETCH_PENDING:
@@ -70,32 +70,32 @@ function template_preprocess_update_report(&$variables) {
       case UPDATE_NOT_SECURE:
       case UPDATE_REVOKED:
       case UPDATE_NOT_SUPPORTED:
-        $rows[$project['project_type']][$row_key]['#attributes'] = array('class' => array('color-error'));
+        $rows[$project['project_type']][$row_key]['#attributes'] = ['class' => ['color-error']];
         break;
       case UPDATE_NOT_CHECKED:
       case UPDATE_NOT_CURRENT:
       default:
-        $rows[$project['project_type']][$row_key]['#attributes'] = array('class' => array('color-warning'));
+        $rows[$project['project_type']][$row_key]['#attributes'] = ['class' => ['color-warning']];
         break;
     }
   }
 
-  $project_types = array(
+  $project_types = [
     'core' => t('Drupal core'),
     'module' => t('Modules'),
     'theme' => t('Themes'),
     'module-disabled' => t('Uninstalled modules'),
     'theme-disabled' => t('Uninstalled themes'),
-  );
+  ];
 
-  $variables['project_types'] = array();
+  $variables['project_types'] = [];
   foreach ($project_types as $type_name => $type_label) {
     if (!empty($rows[$type_name])) {
       ksort($rows[$type_name]);
-      $variables['project_types'][] = array(
+      $variables['project_types'][] = [
         'label' => $type_label,
         'table' => $rows[$type_name],
-      );
+      ];
     }
   }
 }
@@ -124,9 +124,9 @@ function template_preprocess_update_project_status(&$variables) {
 
   $variables['existing_version'] = $project['existing_version'];
 
-  $versions_inner = array();
-  $security_class = array();
-  $version_class = array();
+  $versions_inner = [];
+  $security_class = [];
+  $version_class = [];
   if (isset($project['recommended'])) {
     if ($project['status'] != UPDATE_CURRENT || $project['existing_version'] !== $project['recommended']) {
 
@@ -156,57 +156,57 @@ function template_preprocess_update_project_status(&$variables) {
         ) {
           $version_class[] = 'project-update__version--recommended-strong';
         }
-        $versions_inner[] = array(
+        $versions_inner[] = [
           '#theme' => 'update_version',
           '#version' => $project['releases'][$project['recommended']],
           '#title' => t('Recommended version:'),
-          '#attributes' => array('class' => $version_class),
-        );
+          '#attributes' => ['class' => $version_class],
+        ];
       }
 
       // Now, print any security updates.
       if (!empty($project['security updates'])) {
         $security_class[] = 'version-security';
         foreach ($project['security updates'] as $security_update) {
-          $versions_inner[] = array(
+          $versions_inner[] = [
             '#theme' => 'update_version',
             '#version' => $security_update,
             '#title' => t('Security update:'),
-            '#attributes' => array('class' => $security_class),
-          );
+            '#attributes' => ['class' => $security_class],
+          ];
         }
       }
     }
 
     if ($project['recommended'] !== $project['latest_version']) {
-      $versions_inner[] = array(
+      $versions_inner[] = [
         '#theme' => 'update_version',
         '#version' => $project['releases'][$project['latest_version']],
         '#title' => t('Latest version:'),
-        '#attributes' => array('class' => array('version-latest')),
-      );
+        '#attributes' => ['class' => ['version-latest']],
+      ];
     }
     if ($project['install_type'] == 'dev'
       && $project['status'] != UPDATE_CURRENT
       && isset($project['dev_version'])
       && $project['recommended'] !== $project['dev_version']) {
-      $versions_inner[] = array(
+      $versions_inner[] = [
         '#theme' => 'update_version',
         '#version' => $project['releases'][$project['dev_version']],
         '#title' => t('Development version:'),
-        '#attributes' => array('class' => array('version-latest')),
-      );
+        '#attributes' => ['class' => ['version-latest']],
+      ];
     }
   }
 
   if (isset($project['also'])) {
     foreach ($project['also'] as $also) {
-      $versions_inner[] = array(
+      $versions_inner[] = [
         '#theme' => 'update_version',
         '#version' => $project['releases'][$also],
         '#title' => t('Also available:'),
-        '#attributes' => array('class' => array('version-also-available')),
-      );
+        '#attributes' => ['class' => ['version-also-available']],
+      ];
     }
   }
 
@@ -222,10 +222,10 @@ function template_preprocess_update_project_status(&$variables) {
   sort($project['includes']);
   $variables['includes'] = $project['includes'];
 
-  $variables['extras'] = array();
+  $variables['extras'] = [];
   if (!empty($project['extra'])) {
     foreach ($project['extra'] as $value) {
-      $extra_item = array();
+      $extra_item = [];
       $extra_item['attributes'] = new Attribute();
       $extra_item['label'] = $value['label'];
       $extra_item['data'] = [
@@ -285,12 +285,12 @@ function template_preprocess_update_project_status(&$variables) {
       break;
   }
 
-  $variables['status']['icon'] = array(
+  $variables['status']['icon'] = [
     '#theme' => 'image',
     '#width' => 18,
     '#height' => 18,
     '#uri' => $uri,
     '#alt' => $text,
     '#title' => $text,
-  );
+  ];
 }
diff --git a/core/modules/user/src/AccountForm.php b/core/modules/user/src/AccountForm.php
index 5f4d82002e1b71dab3ad912b83d7cda7b710ab6f..f5e2e49acf4c980497d20cb832fe0f8f952acdd6 100644
--- a/core/modules/user/src/AccountForm.php
+++ b/core/modules/user/src/AccountForm.php
@@ -72,48 +72,48 @@ public function form(array $form, FormStateInterface $form_state) {
     $admin = $user->hasPermission('administer users');
 
     // Account information.
-    $form['account'] = array(
+    $form['account'] = [
       '#type'   => 'container',
       '#weight' => -10,
-    );
+    ];
 
     // The mail field is NOT required if account originally had no mail set
     // and the user performing the edit has 'administer users' permission.
     // This allows users without email address to be edited and deleted.
     // Also see \Drupal\user\Plugin\Validation\Constraint\UserMailRequired.
-    $form['account']['mail'] = array(
+    $form['account']['mail'] = [
       '#type' => 'email',
       '#title' => $this->t('Email address'),
       '#description' => $this->t('A valid email address. All emails from the system will be sent to this address. The email address is not made public and will only be used if you wish to receive a new password or wish to receive certain news or notifications by email.'),
       '#required' => !(!$account->getEmail() && $user->hasPermission('administer users')),
       '#default_value' => (!$register ? $account->getEmail() : ''),
-    );
+    ];
 
     // Only show name field on registration form or user can change own username.
-    $form['account']['name'] = array(
+    $form['account']['name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Username'),
       '#maxlength' => USERNAME_MAX_LENGTH,
       '#description' => $this->t("Several special characters are allowed, including space, period (.), hyphen (-), apostrophe ('), underscore (_), and the @ sign."),
       '#required' => TRUE,
-      '#attributes' => array(
-        'class' => array('username'),
+      '#attributes' => [
+        'class' => ['username'],
         'autocorrect' => 'off',
         'autocapitalize' => 'off',
         'spellcheck' => 'false',
-      ),
+      ],
       '#default_value' => (!$register ? $account->getAccountName() : ''),
       '#access' => ($register || ($user->id() == $account->id() && $user->hasPermission('change own username')) || $admin),
-    );
+    ];
 
     // Display password field only for existing users or when user is allowed to
     // assign a password during registration.
     if (!$register) {
-      $form['account']['pass'] = array(
+      $form['account']['pass'] = [
         '#type' => 'password_confirm',
         '#size' => 25,
         '#description' => $this->t('To change the current user password, enter the new password in both fields.'),
-      );
+      ];
 
       // To skip the current password field, the user must have logged in via a
       // one-time link and have the token in the URL. Store this in $form_state
@@ -126,7 +126,7 @@ public function form(array $form, FormStateInterface $form_state) {
 
       // The user must enter their current password to change to a new one.
       if ($user->id() == $account->id()) {
-        $form['account']['current_pass'] = array(
+        $form['account']['current_pass'] = [
           '#type' => 'password',
           '#title' => $this->t('Current password'),
           '#size' => 25,
@@ -135,34 +135,34 @@ public function form(array $form, FormStateInterface $form_state) {
           // Do not let web browsers remember this password, since we are
           // trying to confirm that the person submitting the form actually
           // knows the current one.
-          '#attributes' => array('autocomplete' => 'off'),
-        );
+          '#attributes' => ['autocomplete' => 'off'],
+        ];
         $form_state->set('user', $account);
 
         // The user may only change their own password without their current
         // password if they logged in via a one-time login link.
         if (!$form_state->get('user_pass_reset')) {
-          $form['account']['current_pass']['#description'] = $this->t('Required if you want to change the %mail or %pass below. <a href=":request_new_url" title="Send password reset instructions via email.">Reset your password</a>.', array(
+          $form['account']['current_pass']['#description'] = $this->t('Required if you want to change the %mail or %pass below. <a href=":request_new_url" title="Send password reset instructions via email.">Reset your password</a>.', [
             '%mail' => $form['account']['mail']['#title'],
             '%pass' => $this->t('Password'),
             ':request_new_url' => $this->url('user.pass'),
-          ));
+          ]);
         }
       }
     }
     elseif (!$config->get('verify_mail') || $admin) {
-      $form['account']['pass'] = array(
+      $form['account']['pass'] = [
         '#type' => 'password_confirm',
         '#size' => 25,
         '#description' => $this->t('Provide a password for the new account in both fields.'),
         '#required' => TRUE,
-      );
+      ];
     }
 
     // When not building the user registration form, prevent web browsers from
     // autofilling/prefilling the email, username, and password fields.
     if ($this->getOperation() != 'register') {
-      foreach (array('mail', 'name', 'pass') as $key) {
+      foreach (['mail', 'name', 'pass'] as $key) {
         if (isset($form['account'][$key])) {
           $form['account'][$key]['#attributes']['autocomplete'] = 'off';
         }
@@ -176,35 +176,35 @@ public function form(array $form, FormStateInterface $form_state) {
       $status = $config->get('register') == USER_REGISTER_VISITORS ? 1 : 0;
     }
 
-    $form['account']['status'] = array(
+    $form['account']['status'] = [
       '#type' => 'radios',
       '#title' => $this->t('Status'),
       '#default_value' => $status,
-      '#options' => array($this->t('Blocked'), $this->t('Active')),
+      '#options' => [$this->t('Blocked'), $this->t('Active')],
       '#access' => $admin,
-    );
+    ];
 
-    $roles = array_map(array('\Drupal\Component\Utility\Html', 'escape'), user_role_names(TRUE));
+    $roles = array_map(['\Drupal\Component\Utility\Html', 'escape'], user_role_names(TRUE));
 
-    $form['account']['roles'] = array(
+    $form['account']['roles'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Roles'),
-      '#default_value' => (!$register ? $account->getRoles() : array()),
+      '#default_value' => (!$register ? $account->getRoles() : []),
       '#options' => $roles,
       '#access' => $roles && $user->hasPermission('administer permissions'),
-    );
+    ];
 
     // Special handling for the inevitable "Authenticated user" role.
-    $form['account']['roles'][RoleInterface::AUTHENTICATED_ID] = array(
+    $form['account']['roles'][RoleInterface::AUTHENTICATED_ID] = [
       '#default_value' => TRUE,
       '#disabled' => TRUE,
-    );
+    ];
 
-    $form['account']['notify'] = array(
+    $form['account']['notify'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Notify user of new account'),
       '#access' => $register && $admin,
-    );
+    ];
 
     $user_preferred_langcode = $register ? $language_interface->getId() : $account->getPreferredLangcode();
 
@@ -216,16 +216,16 @@ public function form(array $form, FormStateInterface $form_state) {
       $negotiator = $this->languageManager->getNegotiator();
       $user_language_added = $negotiator && $negotiator->isNegotiationMethodEnabled(LanguageNegotiationUser::METHOD_ID, LanguageInterface::TYPE_INTERFACE);
     }
-    $form['language'] = array(
+    $form['language'] = [
       '#type' => $this->languageManager->isMultilingual() ? 'details' : 'container',
       '#title' => $this->t('Language settings'),
       '#open' => TRUE,
       // Display language selector when either creating a user on the admin
       // interface or editing a user account.
       '#access' => !$register || $user->hasPermission('administer users'),
-    );
+    ];
 
-    $form['language']['preferred_langcode'] = array(
+    $form['language']['preferred_langcode'] = [
       '#type' => 'language_select',
       '#title' => $this->t('Site language'),
       '#languages' => LanguageInterface::STATE_CONFIGURABLE,
@@ -235,7 +235,7 @@ public function form(array $form, FormStateInterface $form_state) {
       // language are synchronized. It can be removed if a different behavior is
       // desired.
       '#pre_render' => ['user_langcode' => [$this, 'alterPreferredLangcodeDescription']],
-    );
+    ];
 
     // Only show the account setting for Administration pages language to users
     // if one of the detection and selection methods uses it.
@@ -244,7 +244,7 @@ public function form(array $form, FormStateInterface $form_state) {
       $negotiator = $this->languageManager->getNegotiator();
       $show_admin_language = $negotiator && $negotiator->isNegotiationMethodEnabled(LanguageNegotiationUserAdmin::METHOD_ID);
     }
-    $form['language']['preferred_admin_langcode'] = array(
+    $form['language']['preferred_admin_langcode'] = [
       '#type' => 'language_select',
       '#title' => $this->t('Administration pages language'),
       '#languages' => LanguageInterface::STATE_CONFIGURABLE,
@@ -252,7 +252,7 @@ public function form(array $form, FormStateInterface $form_state) {
       '#access' => $show_admin_language,
       '#empty_option' => $this->t('- No preference -'),
       '#empty_value' => '',
-    );
+    ];
 
     // User entities contain both a langcode property (for identifying the
     // language of the entity data) and a preferred_langcode property (see
@@ -317,7 +317,7 @@ public function buildEntity(array $form, FormStateInterface $form_state) {
     $account = parent::buildEntity($form, $form_state);
 
     // Translate the empty value '' of language selects to an unset field.
-    foreach (array('preferred_langcode', 'preferred_admin_langcode') as $field_name) {
+    foreach (['preferred_langcode', 'preferred_admin_langcode'] as $field_name) {
       if ($form_state->getValue($field_name) === '') {
         $account->$field_name = NULL;
       }
@@ -340,7 +340,7 @@ public function buildEntity(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   protected function getEditedFieldNames(FormStateInterface $form_state) {
-    return array_merge(array(
+    return array_merge([
       'name',
       'pass',
       'mail',
@@ -348,7 +348,7 @@ protected function getEditedFieldNames(FormStateInterface $form_state) {
       'langcode',
       'preferred_langcode',
       'preferred_admin_langcode'
-    ), parent::getEditedFieldNames($form_state));
+    ], parent::getEditedFieldNames($form_state));
   }
 
   /**
@@ -358,7 +358,7 @@ protected function flagViolations(EntityConstraintViolationListInterface $violat
     // Manually flag violations of fields not handled by the form display. This
     // is necessary as entity form displays only flag violations for fields
     // contained in the display.
-    $field_names = array(
+    $field_names = [
       'name',
       'pass',
       'mail',
@@ -366,7 +366,7 @@ protected function flagViolations(EntityConstraintViolationListInterface $violat
       'langcode',
       'preferred_langcode',
       'preferred_admin_langcode'
-    );
+    ];
     foreach ($violations->getByFields($field_names) as $violation) {
       list($field_name) = explode('.', $violation->getPropertyPath(), 2);
       $form_state->setErrorByName($field_name, $violation->getMessage());
diff --git a/core/modules/user/src/AccountSettingsForm.php b/core/modules/user/src/AccountSettingsForm.php
index 1e5cd4980e592e3386420e70895d518fbefdc0d4..eacc37857c7412aaa42a12f2ba9286beb5417cfb 100644
--- a/core/modules/user/src/AccountSettingsForm.php
+++ b/core/modules/user/src/AccountSettingsForm.php
@@ -85,25 +85,25 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['#attached']['library'][] = 'user/drupal.user.admin';
 
     // Settings for anonymous users.
-    $form['anonymous_settings'] = array(
+    $form['anonymous_settings'] = [
       '#type' => 'details',
       '#title' => $this->t('Anonymous users'),
       '#open' => TRUE,
-    );
-    $form['anonymous_settings']['anonymous'] = array(
+    ];
+    $form['anonymous_settings']['anonymous'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Name'),
       '#default_value' => $config->get('anonymous'),
       '#description' => $this->t('The name used to indicate anonymous users.'),
       '#required' => TRUE,
-    );
+    ];
 
     // Administrative role option.
-    $form['admin_role'] = array(
+    $form['admin_role'] = [
       '#type' => 'details',
       '#title' => $this->t('Administrator role'),
       '#open' => TRUE,
-    );
+    ];
     // Do not allow users to set the anonymous or authenticated user roles as the
     // administrator role.
     $roles = user_role_names(TRUE);
@@ -114,7 +114,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       ->execute();
     $default_value = reset($admin_roles);
 
-    $form['admin_role']['user_admin_role'] = array(
+    $form['admin_role']['user_admin_role'] = [
       '#type' => 'select',
       '#title' => $this->t('Administrator role'),
       '#empty_value' => '',
@@ -124,53 +124,53 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       // Don't allow to select a single admin role in case multiple roles got
       // marked as admin role already.
       '#access' => count($admin_roles) <= 1,
-    );
+    ];
 
     // @todo Remove this check once language settings are generalized.
     if ($this->moduleHandler->moduleExists('content_translation')) {
-      $form['language'] = array(
+      $form['language'] = [
         '#type' => 'details',
         '#title' => $this->t('Language settings'),
         '#open' => TRUE,
         '#tree' => TRUE,
-      );
+      ];
       $form_state->set(['content_translation', 'key'], 'language');
       $form['language'] += content_translation_enable_widget('user', 'user', $form, $form_state);
     }
 
     // User registration settings.
-    $form['registration_cancellation'] = array(
+    $form['registration_cancellation'] = [
       '#type' => 'details',
       '#title' => $this->t('Registration and cancellation'),
       '#open' => TRUE,
-    );
-    $form['registration_cancellation']['user_register'] = array(
+    ];
+    $form['registration_cancellation']['user_register'] = [
       '#type' => 'radios',
       '#title' => $this->t('Who can register accounts?'),
       '#default_value' => $config->get('register'),
-      '#options' => array(
+      '#options' => [
         USER_REGISTER_ADMINISTRATORS_ONLY => $this->t('Administrators only'),
         USER_REGISTER_VISITORS => $this->t('Visitors'),
         USER_REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL => $this->t('Visitors, but administrator approval is required'),
-      )
-    );
-    $form['registration_cancellation']['user_email_verification'] = array(
+      ]
+    ];
+    $form['registration_cancellation']['user_email_verification'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Require email verification when a visitor creates an account'),
       '#default_value' => $config->get('verify_mail'),
       '#description' => $this->t('New users will be required to validate their email address prior to logging into the site, and will be assigned a system-generated password. With this setting disabled, users will be logged in immediately upon registering, and may select their own passwords during registration.')
-    );
-    $form['registration_cancellation']['user_password_strength'] = array(
+    ];
+    $form['registration_cancellation']['user_password_strength'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Enable password strength indicator'),
       '#default_value' => $config->get('password_strength'),
-    );
-    $form['registration_cancellation']['user_cancel_method'] = array(
+    ];
+    $form['registration_cancellation']['user_cancel_method'] = [
       '#type' => 'radios',
       '#title' => $this->t('When cancelling a user account'),
       '#default_value' => $config->get('cancel_method'),
-      '#description' => $this->t('Users with the %select-cancel-method or %administer-users <a href=":permissions-url">permissions</a> can override this default method.', array('%select-cancel-method' => $this->t('Select method for cancelling account'), '%administer-users' => $this->t('Administer users'), ':permissions-url' => $this->url('user.admin_permissions'))),
-    );
+      '#description' => $this->t('Users with the %select-cancel-method or %administer-users <a href=":permissions-url">permissions</a> can override this default method.', ['%select-cancel-method' => $this->t('Select method for cancelling account'), '%administer-users' => $this->t('Administer users'), ':permissions-url' => $this->url('user.admin_permissions')]),
+    ];
     $form['registration_cancellation']['user_cancel_method'] += user_cancel_methods();
     foreach (Element::children($form['registration_cancellation']['user_cancel_method']) as $key) {
       // All account cancellation methods that specify #access cannot be
@@ -182,239 +182,239 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     // Default notifications address.
-    $form['mail_notification_address'] = array(
+    $form['mail_notification_address'] = [
       '#type' => 'email',
       '#title' => $this->t('Notification email address'),
       '#default_value' => $site_config->get('mail_notification'),
-      '#description' => $this->t("The email address to be used as the 'from' address for all account notifications listed below. If <em>'Visitors, but administrator approval is required'</em> is selected above, a notification email will also be sent to this address for any new registrations. Leave empty to use the default system email address <em>(%site-email).</em>", array('%site-email' => $site_config->get('mail'))),
+      '#description' => $this->t("The email address to be used as the 'from' address for all account notifications listed below. If <em>'Visitors, but administrator approval is required'</em> is selected above, a notification email will also be sent to this address for any new registrations. Leave empty to use the default system email address <em>(%site-email).</em>", ['%site-email' => $site_config->get('mail')]),
       '#maxlength' => 180,
-    );
+    ];
 
-    $form['email'] = array(
+    $form['email'] = [
       '#type' => 'vertical_tabs',
       '#title' => $this->t('Emails'),
-    );
+    ];
     // These email tokens are shared for all settings, so just define
     // the list once to help ensure they stay in sync.
     $email_token_help = $this->t('Available variables are: [site:name], [site:url], [user:display-name], [user:account-name], [user:mail], [site:login-url], [site:url-brief], [user:edit-url], [user:one-time-login-url], [user:cancel-url].');
 
-    $form['email_admin_created'] = array(
+    $form['email_admin_created'] = [
       '#type' => 'details',
       '#title' => $this->t('Welcome (new user created by administrator)'),
       '#open' => $config->get('register') == USER_REGISTER_ADMINISTRATORS_ONLY,
       '#description' => $this->t('Edit the welcome email messages sent to new member accounts created by an administrator.') . ' ' . $email_token_help,
       '#group' => 'email',
-    );
-    $form['email_admin_created']['user_mail_register_admin_created_subject'] = array(
+    ];
+    $form['email_admin_created']['user_mail_register_admin_created_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('register_admin_created.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_admin_created']['user_mail_register_admin_created_body'] = array(
+    ];
+    $form['email_admin_created']['user_mail_register_admin_created_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('register_admin_created.body'),
       '#rows' => 15,
-    );
+    ];
 
-    $form['email_pending_approval'] = array(
+    $form['email_pending_approval'] = [
       '#type' => 'details',
       '#title' => $this->t('Welcome (awaiting approval)'),
       '#open' => $config->get('register') == USER_REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL,
       '#description' => $this->t('Edit the welcome email messages sent to new members upon registering, when administrative approval is required.') . ' ' . $email_token_help,
       '#group' => 'email',
-    );
-    $form['email_pending_approval']['user_mail_register_pending_approval_subject'] = array(
+    ];
+    $form['email_pending_approval']['user_mail_register_pending_approval_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('register_pending_approval.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_pending_approval']['user_mail_register_pending_approval_body'] = array(
+    ];
+    $form['email_pending_approval']['user_mail_register_pending_approval_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('register_pending_approval.body'),
       '#rows' => 8,
-    );
+    ];
 
-    $form['email_pending_approval_admin'] = array(
+    $form['email_pending_approval_admin'] = [
       '#type' => 'details',
       '#title' => $this->t('Admin (user awaiting approval)'),
       '#open' => $config->get('register') == USER_REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL,
       '#description' => $this->t('Edit the email notifying the site administrator that there are new members awaiting administrative approval.') . ' ' . $email_token_help,
       '#group' => 'email',
-    );
-    $form['email_pending_approval_admin']['register_pending_approval_admin_subject'] = array(
+    ];
+    $form['email_pending_approval_admin']['register_pending_approval_admin_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('register_pending_approval_admin.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_pending_approval_admin']['register_pending_approval_admin_body'] = array(
+    ];
+    $form['email_pending_approval_admin']['register_pending_approval_admin_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('register_pending_approval_admin.body'),
       '#rows' => 8,
-    );
+    ];
 
-    $form['email_no_approval_required'] = array(
+    $form['email_no_approval_required'] = [
       '#type' => 'details',
       '#title' => $this->t('Welcome (no approval required)'),
       '#open' => $config->get('register') == USER_REGISTER_VISITORS,
       '#description' => $this->t('Edit the welcome email messages sent to new members upon registering, when no administrator approval is required.') . ' ' . $email_token_help,
       '#group' => 'email',
-    );
-    $form['email_no_approval_required']['user_mail_register_no_approval_required_subject'] = array(
+    ];
+    $form['email_no_approval_required']['user_mail_register_no_approval_required_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('register_no_approval_required.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_no_approval_required']['user_mail_register_no_approval_required_body'] = array(
+    ];
+    $form['email_no_approval_required']['user_mail_register_no_approval_required_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('register_no_approval_required.body'),
       '#rows' => 15,
-    );
+    ];
 
-    $form['email_password_reset'] = array(
+    $form['email_password_reset'] = [
       '#type' => 'details',
       '#title' => $this->t('Password recovery'),
       '#description' => $this->t('Edit the email messages sent to users who request a new password.') . ' ' . $email_token_help,
       '#group' => 'email',
       '#weight' => 10,
-    );
-    $form['email_password_reset']['user_mail_password_reset_subject'] = array(
+    ];
+    $form['email_password_reset']['user_mail_password_reset_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('password_reset.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_password_reset']['user_mail_password_reset_body'] = array(
+    ];
+    $form['email_password_reset']['user_mail_password_reset_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('password_reset.body'),
       '#rows' => 12,
-    );
+    ];
 
-    $form['email_activated'] = array(
+    $form['email_activated'] = [
       '#type' => 'details',
       '#title' => $this->t('Account activation'),
       '#description' => $this->t('Enable and edit email messages sent to users upon account activation (when an administrator activates an account of a user who has already registered, on a site where administrative approval is required).') . ' ' . $email_token_help,
       '#group' => 'email',
-    );
-    $form['email_activated']['user_mail_status_activated_notify'] = array(
+    ];
+    $form['email_activated']['user_mail_status_activated_notify'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Notify user when account is activated'),
       '#default_value' => $config->get('notify.status_activated'),
-    );
-    $form['email_activated']['settings'] = array(
+    ];
+    $form['email_activated']['settings'] = [
       '#type' => 'container',
-      '#states' => array(
+      '#states' => [
         // Hide the additional settings when this email is disabled.
-        'invisible' => array(
-          'input[name="user_mail_status_activated_notify"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
-    $form['email_activated']['settings']['user_mail_status_activated_subject'] = array(
+        'invisible' => [
+          'input[name="user_mail_status_activated_notify"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
+    $form['email_activated']['settings']['user_mail_status_activated_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('status_activated.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_activated']['settings']['user_mail_status_activated_body'] = array(
+    ];
+    $form['email_activated']['settings']['user_mail_status_activated_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('status_activated.body'),
       '#rows' => 15,
-    );
+    ];
 
-    $form['email_blocked'] = array(
+    $form['email_blocked'] = [
       '#type' => 'details',
       '#title' => $this->t('Account blocked'),
       '#description' => $this->t('Enable and edit email messages sent to users when their accounts are blocked.') . ' ' . $email_token_help,
       '#group' => 'email',
-    );
-    $form['email_blocked']['user_mail_status_blocked_notify'] = array(
+    ];
+    $form['email_blocked']['user_mail_status_blocked_notify'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Notify user when account is blocked'),
       '#default_value' => $config->get('notify.status_blocked'),
-    );
-    $form['email_blocked']['settings'] = array(
+    ];
+    $form['email_blocked']['settings'] = [
       '#type' => 'container',
-      '#states' => array(
+      '#states' => [
         // Hide the additional settings when the blocked email is disabled.
-        'invisible' => array(
-          'input[name="user_mail_status_blocked_notify"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
-    $form['email_blocked']['settings']['user_mail_status_blocked_subject'] = array(
+        'invisible' => [
+          'input[name="user_mail_status_blocked_notify"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
+    $form['email_blocked']['settings']['user_mail_status_blocked_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('status_blocked.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_blocked']['settings']['user_mail_status_blocked_body'] = array(
+    ];
+    $form['email_blocked']['settings']['user_mail_status_blocked_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('status_blocked.body'),
       '#rows' => 3,
-    );
+    ];
 
-    $form['email_cancel_confirm'] = array(
+    $form['email_cancel_confirm'] = [
       '#type' => 'details',
       '#title' => $this->t('Account cancellation confirmation'),
       '#description' => $this->t('Edit the email messages sent to users when they attempt to cancel their accounts.') . ' ' . $email_token_help,
       '#group' => 'email',
-    );
-    $form['email_cancel_confirm']['user_mail_cancel_confirm_subject'] = array(
+    ];
+    $form['email_cancel_confirm']['user_mail_cancel_confirm_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('cancel_confirm.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_cancel_confirm']['user_mail_cancel_confirm_body'] = array(
+    ];
+    $form['email_cancel_confirm']['user_mail_cancel_confirm_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('cancel_confirm.body'),
       '#rows' => 3,
-    );
+    ];
 
-    $form['email_canceled'] = array(
+    $form['email_canceled'] = [
       '#type' => 'details',
       '#title' => $this->t('Account canceled'),
       '#description' => $this->t('Enable and edit email messages sent to users when their accounts are canceled.') . ' ' . $email_token_help,
       '#group' => 'email',
-    );
-    $form['email_canceled']['user_mail_status_canceled_notify'] = array(
+    ];
+    $form['email_canceled']['user_mail_status_canceled_notify'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Notify user when account is canceled'),
       '#default_value' => $config->get('notify.status_canceled'),
-    );
-    $form['email_canceled']['settings'] = array(
+    ];
+    $form['email_canceled']['settings'] = [
       '#type' => 'container',
-      '#states' => array(
+      '#states' => [
         // Hide the settings when the cancel notify checkbox is disabled.
-        'invisible' => array(
-          'input[name="user_mail_status_canceled_notify"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
-    $form['email_canceled']['settings']['user_mail_status_canceled_subject'] = array(
+        'invisible' => [
+          'input[name="user_mail_status_canceled_notify"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
+    $form['email_canceled']['settings']['user_mail_status_canceled_subject'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subject'),
       '#default_value' => $mail_config->get('status_canceled.subject'),
       '#maxlength' => 180,
-    );
-    $form['email_canceled']['settings']['user_mail_status_canceled_body'] = array(
+    ];
+    $form['email_canceled']['settings']['user_mail_status_canceled_body'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Body'),
       '#default_value' => $mail_config->get('status_canceled.body'),
       '#rows' => 3,
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/user/src/Controller/UserController.php b/core/modules/user/src/Controller/UserController.php
index 779cf90fbe018aa878a97446a8a9eac23f47aa7d..be15fac4ab8d2d919d5363b16ec9f8078c36f881 100644
--- a/core/modules/user/src/Controller/UserController.php
+++ b/core/modules/user/src/Controller/UserController.php
@@ -121,7 +121,7 @@ public function resetPass(Request $request, $uid, $timestamp, $hash) {
         /** @var \Drupal\user\UserInterface $reset_link_user */
         if ($reset_link_user = $this->userStorage->load($uid)) {
           drupal_set_message($this->t('Another user (%other_user) is already logged into the site on this computer, but you tried to use a one-time link for user %resetting_user. Please <a href=":logout">log out</a> and try using the link again.',
-            array('%other_user' => $account->getUsername(), '%resetting_user' => $reset_link_user->getUsername(), ':logout' => $this->url('user.logout'))), 'warning');
+            ['%other_user' => $account->getUsername(), '%resetting_user' => $reset_link_user->getUsername(), ':logout' => $this->url('user.logout')]), 'warning');
         }
         else {
           // Invalid one-time link specifies an unknown user.
@@ -254,7 +254,7 @@ public function resetPassLogin($uid, $timestamp, $hash) {
    *   Returns a redirect to the profile of the currently logged in user.
    */
   public function userPage() {
-    return $this->redirect('entity.user.canonical', array('user' => $this->currentUser()->id()));
+    return $this->redirect('entity.user.canonical', ['user' => $this->currentUser()->id()]);
   }
 
   /**
@@ -305,9 +305,9 @@ public function confirmCancel(UserInterface $user, $timestamp = 0, $hashed_pass
     if (isset($account_data['cancel_method']) && !empty($timestamp) && !empty($hashed_pass)) {
       // Validate expiration and hashed password/login.
       if ($timestamp <= $current && $current - $timestamp < $timeout && $user->id() && $timestamp >= $user->getLastLoginTime() && Crypt::hashEquals($hashed_pass, user_pass_rehash($user, $timestamp))) {
-        $edit = array(
+        $edit = [
           'user_cancel_notify' => isset($account_data['cancel_notify']) ? $account_data['cancel_notify'] : $this->config('user.settings')->get('notify.status_canceled'),
-        );
+        ];
         user_cancel($edit, $user->id(), $account_data['cancel_method']);
         // Since user_cancel() is not invoked via Form API, batch processing
         // needs to be invoked manually and should redirect to the front page
diff --git a/core/modules/user/src/Entity/Role.php b/core/modules/user/src/Entity/Role.php
index a0b709c35bf2c6f11e9f504daef8a6703f557408..0e7ef0e5cbf50ad8ab20186a2b5e613de62a0887 100644
--- a/core/modules/user/src/Entity/Role.php
+++ b/core/modules/user/src/Entity/Role.php
@@ -72,7 +72,7 @@ class Role extends ConfigEntityBase implements RoleInterface {
    *
    * @var array
    */
-  protected $permissions = array();
+  protected $permissions = [];
 
   /**
    * An indicator whether the role has all permissions.
@@ -136,7 +136,7 @@ public function revokePermission($permission) {
     if ($this->isAdmin()) {
       return $this;
     }
-    $this->permissions = array_diff($this->permissions, array($permission));
+    $this->permissions = array_diff($this->permissions, [$permission]);
     return $this;
   }
 
diff --git a/core/modules/user/src/Entity/User.php b/core/modules/user/src/Entity/User.php
index 062af4425184a19f1d3f893d3d45e6d68c44edd5..38f0f39845eead874a54f7762b7e8b5d536c9e92 100644
--- a/core/modules/user/src/Entity/User.php
+++ b/core/modules/user/src/Entity/User.php
@@ -82,13 +82,13 @@ public function preSave(EntityStorageInterface $storage) {
 
     // Make sure that the authenticated/anonymous roles are not persisted.
     foreach ($this->get('roles') as $index => $item) {
-      if (in_array($item->target_id, array(RoleInterface::ANONYMOUS_ID, RoleInterface::AUTHENTICATED_ID))) {
+      if (in_array($item->target_id, [RoleInterface::ANONYMOUS_ID, RoleInterface::AUTHENTICATED_ID])) {
         $this->get('roles')->offsetUnset($index);
       }
     }
 
     // Store account cancellation information.
-    foreach (array('user_cancel_method', 'user_cancel_notify') as $key) {
+    foreach (['user_cancel_method', 'user_cancel_notify'] as $key) {
       if (isset($this->{$key})) {
         \Drupal::service('user.data')->set('user', $this->id(), substr($key, 5), $this->{$key});
       }
@@ -140,7 +140,7 @@ public static function postDelete(EntityStorageInterface $storage, array $entiti
    * {@inheritdoc}
    */
   public function getRoles($exclude_locked_roles = FALSE) {
-    $roles = array();
+    $roles = [];
 
     // Users with an ID always have the authenticated user role.
     if (!$exclude_locked_roles) {
@@ -186,7 +186,7 @@ public function addRole($rid) {
    * {@inheritdoc}
    */
   public function removeRole($rid) {
-    $this->set('roles', array_diff($this->getRoles(TRUE), array($rid)));
+    $this->set('roles', array_diff($this->getRoles(TRUE), [$rid]));
   }
 
   /**
@@ -445,9 +445,9 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setDescription(t("The user's preferred language code for receiving emails and viewing the site."))
       // @todo: Define this via an options provider once
       // https://www.drupal.org/node/2329937 is completed.
-      ->addPropertyConstraints('value', array(
-        'AllowedValues' => array('callback' => __CLASS__ . '::getAllowedConfigurableLanguageCodes'),
-      ));
+      ->addPropertyConstraints('value', [
+        'AllowedValues' => ['callback' => __CLASS__ . '::getAllowedConfigurableLanguageCodes'],
+      ]);
 
     $fields['preferred_admin_langcode'] = BaseFieldDefinition::create('language')
       ->setLabel(t('Preferred admin language code'))
@@ -455,12 +455,12 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       // @todo: A default value of NULL is ignored, so we have to specify
       // an empty field item structure instead. Fix this in
       // https://www.drupal.org/node/2318605.
-      ->setDefaultValue(array(0 => array ('value' => NULL)))
+      ->setDefaultValue([0 =>  ['value' => NULL]])
       // @todo: Define this via an options provider once
       // https://www.drupal.org/node/2329937 is completed.
-      ->addPropertyConstraints('value', array(
-        'AllowedValues' => array('callback' => __CLASS__ . '::getAllowedConfigurableLanguageCodes'),
-      ));
+      ->addPropertyConstraints('value', [
+        'AllowedValues' => ['callback' => __CLASS__ . '::getAllowedConfigurableLanguageCodes'],
+      ]);
 
     // The name should not vary per language. The username is the visual
     // identifier for a user and needs to be consistent in all languages.
@@ -468,12 +468,12 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('Name'))
       ->setDescription(t('The name of this user.'))
       ->setRequired(TRUE)
-      ->setConstraints(array(
+      ->setConstraints([
         // No Length constraint here because the UserName constraint also covers
         // that.
-        'UserName' => array(),
-        'UserNameUnique' => array(),
-      ));
+        'UserName' => [],
+        'UserNameUnique' => [],
+      ]);
     $fields['name']->getItemDefinition()->setClass('\Drupal\user\UserNameItem');
 
     $fields['pass'] = BaseFieldDefinition::create('password')
@@ -495,9 +495,9 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setSetting('max_length', 32)
       // @todo: Define this via an options provider once
       // https://www.drupal.org/node/2329937 is completed.
-      ->addPropertyConstraints('value', array(
-        'AllowedValues' => array('callback' => __CLASS__ . '::getAllowedTimezones'),
-      ));
+      ->addPropertyConstraints('value', [
+        'AllowedValues' => ['callback' => __CLASS__ . '::getAllowedTimezones'],
+      ]);
 
     $fields['status'] = BaseFieldDefinition::create('boolean')
       ->setLabel(t('User status'))
diff --git a/core/modules/user/src/Form/UserCancelForm.php b/core/modules/user/src/Form/UserCancelForm.php
index 0ab89335b9a672894dda2e55fd3929fecdf3d825..14c553c3b78dea27ba9f353e01da0f74a072530a 100644
--- a/core/modules/user/src/Form/UserCancelForm.php
+++ b/core/modules/user/src/Form/UserCancelForm.php
@@ -31,7 +31,7 @@ public function getQuestion() {
     if ($this->entity->id() == $this->currentUser()->id()) {
       return $this->t('Are you sure you want to cancel your account?');
     }
-    return $this->t('Are you sure you want to cancel the account %name?', array('%name' => $this->entity->label()));
+    return $this->t('Are you sure you want to cancel the account %name?', ['%name' => $this->entity->label()]);
   }
 
   /**
@@ -74,43 +74,43 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     // Display account cancellation method selection, if allowed.
     $admin_access = $user->hasPermission('administer users');
-    $form['user_cancel_method'] = array(
+    $form['user_cancel_method'] = [
       '#type' => 'radios',
       '#title' => ($this->entity->id() == $user->id() ? $this->t('When cancelling your account') : $this->t('When cancelling the account')),
       '#access' => $admin_access || $user->hasPermission('select account cancellation method'),
-    );
+    ];
     $form['user_cancel_method'] += $this->cancelMethods;
 
     // Allow user administrators to skip the account cancellation confirmation
     // mail (by default), as long as they do not attempt to cancel their own
     // account.
     $override_access = $admin_access && ($this->entity->id() != $user->id());
-    $form['user_cancel_confirm'] = array(
+    $form['user_cancel_confirm'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Require email confirmation to cancel account'),
       '#default_value' => !$override_access,
       '#access' => $override_access,
       '#description' => $this->t('When enabled, the user must confirm the account cancellation via email.'),
-    );
+    ];
     // Also allow to send account canceled notification mail, if enabled.
     $default_notify = $this->config('user.settings')->get('notify.status_canceled');
-    $form['user_cancel_notify'] = array(
+    $form['user_cancel_notify'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Notify user when account is canceled'),
       '#default_value' => ($override_access ? FALSE : $default_notify),
       '#access' => $override_access && $default_notify,
       '#description' => $this->t('When enabled, the user will receive an email notification after the account has been canceled.'),
-    );
+    ];
 
     // Always provide entity id in the same form key as in the entity edit form.
-    $form['uid'] = array('#type' => 'value', '#value' => $this->entity->id());
+    $form['uid'] = ['#type' => 'value', '#value' => $this->entity->id()];
 
     // Store the user permissions so that it can be altered in hook_form_alter()
     // if desired.
-    $form['access'] = array(
+    $form['access'] = [
       '#type' => 'value',
       '#value' => $user->hasPermission('administer users'),
-    );
+    ];
 
     $form = parent::buildForm($form, $form_state);
 
@@ -138,11 +138,11 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       $this->entity->save();
       _user_mail_notify('cancel_confirm', $this->entity);
       drupal_set_message($this->t('A confirmation request to cancel your account has been sent to your email address.'));
-      $this->logger('user')->notice('Sent account cancellation request to %name %email.', array('%name' => $this->entity->label(), '%email' => '<' . $this->entity->getEmail() . '>'));
+      $this->logger('user')->notice('Sent account cancellation request to %name %email.', ['%name' => $this->entity->label(), '%email' => '<' . $this->entity->getEmail() . '>']);
 
       $form_state->setRedirect(
         'entity.user.canonical',
-        array('user' => $this->entity->id())
+        ['user' => $this->entity->id()]
       );
     }
   }
diff --git a/core/modules/user/src/Form/UserLoginForm.php b/core/modules/user/src/Form/UserLoginForm.php
index 43b29e545a67bb047429476ec2404984ac5235f8..25a54ec4b72371c49ee270429b2d7a3b17efb367 100644
--- a/core/modules/user/src/Form/UserLoginForm.php
+++ b/core/modules/user/src/Form/UserLoginForm.php
@@ -88,31 +88,31 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('system.site');
 
     // Display login form:
-    $form['name'] = array(
+    $form['name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Username'),
       '#size' => 60,
       '#maxlength' => USERNAME_MAX_LENGTH,
-      '#description' => $this->t('Enter your @s username.', array('@s' => $config->get('name'))),
+      '#description' => $this->t('Enter your @s username.', ['@s' => $config->get('name')]),
       '#required' => TRUE,
-      '#attributes' => array(
+      '#attributes' => [
         'autocorrect' => 'none',
         'autocapitalize' => 'none',
         'spellcheck' => 'false',
         'autofocus' => 'autofocus',
-      ),
-    );
+      ],
+    ];
 
-    $form['pass'] = array(
+    $form['pass'] = [
       '#type' => 'password',
       '#title' => $this->t('Password'),
       '#size' => 60,
       '#description' => $this->t('Enter the password that accompanies your username.'),
       '#required' => TRUE,
-    );
+    ];
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array('#type' => 'submit', '#value' => $this->t('Log in'));
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = ['#type' => 'submit', '#value' => $this->t('Log in')];
 
     $form['#validate'][] = '::validateName';
     $form['#validate'][] = '::validateAuthentication';
@@ -133,7 +133,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if (!$this->getRequest()->request->has('destination')) {
       $form_state->setRedirect(
         'entity.user.canonical',
-        array('user' => $account->id())
+        ['user' => $account->id()]
       );
     }
     else {
@@ -149,7 +149,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
   public function validateName(array &$form, FormStateInterface $form_state) {
     if (!$form_state->isValueEmpty('name') && user_is_blocked($form_state->getValue('name'))) {
       // Blocked in user administration.
-      $form_state->setErrorByName('name', $this->t('The username %name has not been activated or is blocked.', array('%name' => $form_state->getValue('name'))));
+      $form_state->setErrorByName('name', $this->t('The username %name has not been activated or is blocked.', ['%name' => $form_state->getValue('name')]));
     }
   }
 
@@ -171,7 +171,7 @@ public function validateAuthentication(array &$form, FormStateInterface $form_st
         $form_state->set('flood_control_triggered', 'ip');
         return;
       }
-      $accounts = $this->userStorage->loadByProperties(array('name' => $form_state->getValue('name'), 'status' => 1));
+      $accounts = $this->userStorage->loadByProperties(['name' => $form_state->getValue('name'), 'status' => 1]);
       $account = reset($accounts);
       if ($account) {
         if ($flood_config->get('uid_only')) {
@@ -218,11 +218,11 @@ public function validateFinal(array &$form, FormStateInterface $form_state) {
 
       if ($flood_control_triggered = $form_state->get('flood_control_triggered')) {
         if ($flood_control_triggered == 'user') {
-          $form_state->setErrorByName('name', $this->formatPlural($flood_config->get('user_limit'), 'There has been more than one failed login attempt for this account. It is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', 'There have been more than @count failed login attempts for this account. It is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', array(':url' => $this->url('user.pass'))));
+          $form_state->setErrorByName('name', $this->formatPlural($flood_config->get('user_limit'), 'There has been more than one failed login attempt for this account. It is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', 'There have been more than @count failed login attempts for this account. It is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', [':url' => $this->url('user.pass')]));
         }
         else {
           // We did not find a uid, so the limit is IP-based.
-          $form_state->setErrorByName('name', $this->t('Too many failed login attempts from your IP address. This IP address is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', array(':url' => $this->url('user.pass'))));
+          $form_state->setErrorByName('name', $this->t('Too many failed login attempts from your IP address. This IP address is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', [':url' => $this->url('user.pass')]));
         }
       }
       else {
@@ -231,16 +231,16 @@ public function validateFinal(array &$form, FormStateInterface $form_state) {
         // $form_state->getValue() may have been modified by validation
         // handlers that ran earlier than this one.
         $user_input = $form_state->getUserInput();
-        $query = isset($user_input['name']) ? array('name' => $user_input['name']) : array();
-        $form_state->setErrorByName('name', $this->t('Unrecognized username or password. <a href=":password">Forgot your password?</a>', array(':password' => $this->url('user.pass', [], array('query' => $query)))));
-        $accounts = $this->userStorage->loadByProperties(array('name' => $form_state->getValue('name')));
+        $query = isset($user_input['name']) ? ['name' => $user_input['name']] : [];
+        $form_state->setErrorByName('name', $this->t('Unrecognized username or password. <a href=":password">Forgot your password?</a>', [':password' => $this->url('user.pass', [], ['query' => $query])]));
+        $accounts = $this->userStorage->loadByProperties(['name' => $form_state->getValue('name')]);
         if (!empty($accounts)) {
-          $this->logger('user')->notice('Login attempt failed for %user.', array('%user' => $form_state->getValue('name')));
+          $this->logger('user')->notice('Login attempt failed for %user.', ['%user' => $form_state->getValue('name')]);
         }
         else {
           // If the username entered is not a valid user,
           // only store the IP address.
-          $this->logger('user')->notice('Login attempt failed from %ip.', array('%ip' => $this->getRequest()->getClientIp()));
+          $this->logger('user')->notice('Login attempt failed from %ip.', ['%ip' => $this->getRequest()->getClientIp()]);
         }
       }
     }
diff --git a/core/modules/user/src/Form/UserMultipleCancelConfirm.php b/core/modules/user/src/Form/UserMultipleCancelConfirm.php
index a97f803ac91e034d16dc19bcbddc22982d5b8ca0..62a64e5d2b0cc08ef2cd27926132c4a0649a1787 100644
--- a/core/modules/user/src/Form/UserMultipleCancelConfirm.php
+++ b/core/modules/user/src/Form/UserMultipleCancelConfirm.php
@@ -129,7 +129,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Output a notice that user 1 cannot be canceled.
     if (isset($root)) {
       $redirect = (count($accounts) == 1);
-      $message = $this->t('The user account %name cannot be canceled.', array('%name' => $root->label()));
+      $message = $this->t('The user account %name cannot be canceled.', ['%name' => $root->label()]);
       drupal_set_message($message, $redirect ? 'error' : 'warning');
       // If only user 1 was selected, redirect to the overview.
       if ($redirect) {
@@ -137,30 +137,30 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       }
     }
 
-    $form['operation'] = array('#type' => 'hidden', '#value' => 'cancel');
+    $form['operation'] = ['#type' => 'hidden', '#value' => 'cancel'];
 
-    $form['user_cancel_method'] = array(
+    $form['user_cancel_method'] = [
       '#type' => 'radios',
       '#title' => $this->t('When cancelling these accounts'),
-    );
+    ];
 
     $form['user_cancel_method'] += user_cancel_methods();
 
     // Allow to send the account cancellation confirmation mail.
-    $form['user_cancel_confirm'] = array(
+    $form['user_cancel_confirm'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Require email confirmation to cancel account'),
       '#default_value' => FALSE,
       '#description' => $this->t('When enabled, the user must confirm the account cancellation via email.'),
-    );
+    ];
     // Also allow to send account canceled notification mail, if enabled.
-    $form['user_cancel_notify'] = array(
+    $form['user_cancel_notify'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Notify user when account is canceled'),
       '#default_value' => FALSE,
       '#access' => $this->config('user.settings')->get('notify.status_canceled'),
       '#description' => $this->t('When enabled, the user will receive an email notification after the account has been canceled.'),
-    );
+    ];
 
     $form = parent::buildForm($form, $form_state);
 
@@ -183,7 +183,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         }
         // Prevent user administrators from deleting themselves without confirmation.
         if ($uid == $current_user_id) {
-          $admin_form_mock = array();
+          $admin_form_mock = [];
           $admin_form_state = $form_state;
           $admin_form_state->unsetValue('user_cancel_confirm');
           // The $user global is not a complete user entity, so load the full
diff --git a/core/modules/user/src/Form/UserPasswordForm.php b/core/modules/user/src/Form/UserPasswordForm.php
index a89549a0edb8eb1b53d8d3fc138c61d43d0c9688..ea224fe439e9859bf6765530e953efebcb83ad44 100644
--- a/core/modules/user/src/Form/UserPasswordForm.php
+++ b/core/modules/user/src/Form/UserPasswordForm.php
@@ -65,40 +65,40 @@ public function getFormId() {
    *   The request object.
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['name'] = array(
+    $form['name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Username or email address'),
       '#size' => 60,
       '#maxlength' => max(USERNAME_MAX_LENGTH, Email::EMAIL_MAX_LENGTH),
       '#required' => TRUE,
-      '#attributes' => array(
+      '#attributes' => [
         'autocorrect' => 'off',
         'autocapitalize' => 'off',
         'spellcheck' => 'false',
         'autofocus' => 'autofocus',
-      ),
-    );
+      ],
+    ];
     // Allow logged in users to request this also.
     $user = $this->currentUser();
     if ($user->isAuthenticated()) {
       $form['name']['#type'] = 'value';
       $form['name']['#value'] = $user->getEmail();
-      $form['mail'] = array(
+      $form['mail'] = [
         '#prefix' => '<p>',
-        '#markup' => $this->t('Password reset instructions will be mailed to %email. You must log out to use the password reset link in the email.', array('%email' => $user->getEmail())),
+        '#markup' => $this->t('Password reset instructions will be mailed to %email. You must log out to use the password reset link in the email.', ['%email' => $user->getEmail()]),
         '#suffix' => '</p>',
-      );
+      ];
     }
     else {
-      $form['mail'] = array(
+      $form['mail'] = [
         '#prefix' => '<p>',
         '#markup' => $this->t('Password reset instructions will be sent to your registered email address.'),
         '#suffix' => '</p>',
-      );
+      ];
       $form['name']['#default_value'] = $this->getRequest()->query->get('name');
     }
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array('#type' => 'submit', '#value' => $this->t('Submit'));
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = ['#type' => 'submit', '#value' => $this->t('Submit')];
     $form['#cache']['contexts'][] = 'url.query_args';
 
     return $form;
@@ -110,23 +110,23 @@ public function buildForm(array $form, FormStateInterface $form_state) {
   public function validateForm(array &$form, FormStateInterface $form_state) {
     $name = trim($form_state->getValue('name'));
     // Try to load by email.
-    $users = $this->userStorage->loadByProperties(array('mail' => $name));
+    $users = $this->userStorage->loadByProperties(['mail' => $name]);
     if (empty($users)) {
       // No success, try to load by name.
-      $users = $this->userStorage->loadByProperties(array('name' => $name));
+      $users = $this->userStorage->loadByProperties(['name' => $name]);
     }
     $account = reset($users);
     if ($account && $account->id()) {
       // Blocked accounts cannot request a new password.
       if (!$account->isActive()) {
-        $form_state->setErrorByName('name', $this->t('%name is blocked or has not been activated yet.', array('%name' => $name)));
+        $form_state->setErrorByName('name', $this->t('%name is blocked or has not been activated yet.', ['%name' => $name]));
       }
       else {
-        $form_state->setValueForElement(array('#parents' => array('account')), $account);
+        $form_state->setValueForElement(['#parents' => ['account']], $account);
       }
     }
     else {
-      $form_state->setErrorByName('name', $this->t('%name is not recognized as a username or an email address.', array('%name' => $name)));
+      $form_state->setErrorByName('name', $this->t('%name is not recognized as a username or an email address.', ['%name' => $name]));
     }
   }
 
@@ -140,7 +140,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     // Mail one time login URL and instructions using current language.
     $mail = _user_mail_notify('password_reset', $account, $langcode);
     if (!empty($mail)) {
-      $this->logger('user')->notice('Password reset instructions mailed to %name at %email.', array('%name' => $account->getUsername(), '%email' => $account->getEmail()));
+      $this->logger('user')->notice('Password reset instructions mailed to %name at %email.', ['%name' => $account->getUsername(), '%email' => $account->getEmail()]);
       drupal_set_message($this->t('Further instructions have been sent to your email address.'));
     }
 
diff --git a/core/modules/user/src/Form/UserPasswordResetForm.php b/core/modules/user/src/Form/UserPasswordResetForm.php
index 1372415cf2d559de94245fb65274184d10760f59..ce8c7cca1d713633143e8e2fbfe87ef279a21651 100644
--- a/core/modules/user/src/Form/UserPasswordResetForm.php
+++ b/core/modules/user/src/Form/UserPasswordResetForm.php
@@ -38,21 +38,21 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state, AccountInterface $user = NULL, $expiration_date = NULL, $timestamp = NULL, $hash = NULL) {
     if ($expiration_date) {
-      $form['message'] = array('#markup' => $this->t('<p>This is a one-time login for %user_name and will expire on %expiration_date.</p><p>Click on this button to log in to the site and change your password.</p>', array('%user_name' => $user->getUsername(), '%expiration_date' => $expiration_date)));
+      $form['message'] = ['#markup' => $this->t('<p>This is a one-time login for %user_name and will expire on %expiration_date.</p><p>Click on this button to log in to the site and change your password.</p>', ['%user_name' => $user->getUsername(), '%expiration_date' => $expiration_date])];
       $form['#title'] = $this->t('Reset password');
     }
     else {
       // No expiration for first time login.
-      $form['message'] = array('#markup' => $this->t('<p>This is a one-time login for %user_name.</p><p>Click on this button to log in to the site and change your password.</p>', array('%user_name' => $user->getUsername())));
+      $form['message'] = ['#markup' => $this->t('<p>This is a one-time login for %user_name.</p><p>Click on this button to log in to the site and change your password.</p>', ['%user_name' => $user->getUsername()])];
       $form['#title'] = $this->t('Set password');
     }
 
-    $form['help'] = array('#markup' => '<p>' . $this->t('This login can be used only once.') . '</p>');
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['help'] = ['#markup' => '<p>' . $this->t('This login can be used only once.') . '</p>'];
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Log in'),
-    );
+    ];
     $form['#action'] = Url::fromRoute('user.reset.login', [
       'uid' => $user->id(),
       'timestamp' => $timestamp,
diff --git a/core/modules/user/src/Form/UserPermissionsForm.php b/core/modules/user/src/Form/UserPermissionsForm.php
index 75bbaf23522dc9466c76cafed8fadc5bfe091edf..0b3da3b8a76e5dcfd27b7551e2bfbf1f1f0d7150 100644
--- a/core/modules/user/src/Form/UserPermissionsForm.php
+++ b/core/modules/user/src/Form/UserPermissionsForm.php
@@ -83,9 +83,9 @@ protected function getRoles() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $role_names = array();
-    $role_permissions = array();
-    $admin_roles = array();
+    $role_names = [];
+    $role_permissions = [];
+    $admin_roles = [];
     foreach ($this->getRoles() as $role_name => $role) {
       // Retrieve role names for columns.
       $role_names[$role_name] = $role->label();
@@ -95,79 +95,79 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     // Store $role_names for use when saving the data.
-    $form['role_names'] = array(
+    $form['role_names'] = [
       '#type' => 'value',
       '#value' => $role_names,
-    );
+    ];
     // Render role/permission overview:
     $hide_descriptions = system_admin_compact_mode();
 
-    $form['system_compact_link'] = array(
+    $form['system_compact_link'] = [
       '#id' => FALSE,
       '#type' => 'system_compact_link',
-    );
+    ];
 
-    $form['permissions'] = array(
+    $form['permissions'] = [
       '#type' => 'table',
-      '#header' => array($this->t('Permission')),
+      '#header' => [$this->t('Permission')],
       '#id' => 'permissions',
       '#attributes' => ['class' => ['permissions', 'js-permissions']],
       '#sticky' => TRUE,
-    );
+    ];
     foreach ($role_names as $name) {
-      $form['permissions']['#header'][] = array(
+      $form['permissions']['#header'][] = [
         'data' => $name,
-        'class' => array('checkbox'),
-      );
+        'class' => ['checkbox'],
+      ];
     }
 
     $permissions = $this->permissionHandler->getPermissions();
-    $permissions_by_provider = array();
+    $permissions_by_provider = [];
     foreach ($permissions as $permission_name => $permission) {
       $permissions_by_provider[$permission['provider']][$permission_name] = $permission;
     }
 
     foreach ($permissions_by_provider as $provider => $permissions) {
       // Module name.
-      $form['permissions'][$provider] = array(array(
-        '#wrapper_attributes' => array(
+      $form['permissions'][$provider] = [[
+        '#wrapper_attributes' => [
           'colspan' => count($role_names) + 1,
-          'class' => array('module'),
+          'class' => ['module'],
           'id' => 'module-' . $provider,
-        ),
+        ],
         '#markup' => $this->moduleHandler->getName($provider),
-      ));
+      ]];
       foreach ($permissions as $perm => $perm_item) {
         // Fill in default values for the permission.
-        $perm_item += array(
+        $perm_item += [
           'description' => '',
           'restrict access' => FALSE,
           'warning' => !empty($perm_item['restrict access']) ? $this->t('Warning: Give to trusted roles only; this permission has security implications.') : '',
-        );
-        $form['permissions'][$perm]['description'] = array(
+        ];
+        $form['permissions'][$perm]['description'] = [
           '#type' => 'inline_template',
           '#template' => '<div class="permission"><span class="title">{{ title }}</span>{% if description or warning %}<div class="description">{% if warning %}<em class="permission-warning">{{ warning }}</em> {% endif %}{{ description }}</div>{% endif %}</div>',
-          '#context' => array(
+          '#context' => [
             'title' => $perm_item['title'],
-          ),
-        );
+          ],
+        ];
         // Show the permission description.
         if (!$hide_descriptions) {
           $form['permissions'][$perm]['description']['#context']['description'] = $perm_item['description'];
           $form['permissions'][$perm]['description']['#context']['warning'] = $perm_item['warning'];
         }
         foreach ($role_names as $rid => $name) {
-          $form['permissions'][$perm][$rid] = array(
+          $form['permissions'][$perm][$rid] = [
             '#title' => $name . ': ' . $perm_item['title'],
             '#title_display' => 'invisible',
-            '#wrapper_attributes' => array(
-              'class' => array('checkbox'),
-            ),
+            '#wrapper_attributes' => [
+              'class' => ['checkbox'],
+            ],
             '#type' => 'checkbox',
             '#default_value' => in_array($perm, $role_permissions[$rid]) ? 1 : 0,
-            '#attributes' => array('class' => array('rid-' . $rid, 'js-rid-' . $rid)),
-            '#parents' => array($rid, $perm),
-          );
+            '#attributes' => ['class' => ['rid-' . $rid, 'js-rid-' . $rid]],
+            '#parents' => [$rid, $perm],
+          ];
           // Show a column of disabled but checked checkboxes.
           if ($admin_roles[$rid]) {
             $form['permissions'][$perm][$rid]['#disabled'] = TRUE;
@@ -177,12 +177,12 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       }
     }
 
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
+    $form['actions'] = ['#type' => 'actions'];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save permissions'),
       '#button_type' => 'primary',
-    );
+    ];
 
     $form['#attached']['library'][] = 'user/drupal.user.permissions';
 
diff --git a/core/modules/user/src/Form/UserPermissionsRoleSpecificForm.php b/core/modules/user/src/Form/UserPermissionsRoleSpecificForm.php
index 41ae8b8788cfc60a6b263921d5fd4a64555e2c51..4281a44b97b71f4699e10ee4a008f206da14f231 100644
--- a/core/modules/user/src/Form/UserPermissionsRoleSpecificForm.php
+++ b/core/modules/user/src/Form/UserPermissionsRoleSpecificForm.php
@@ -21,7 +21,7 @@ class UserPermissionsRoleSpecificForm extends UserPermissionsForm {
    * {@inheritdoc}
    */
   protected function getRoles() {
-    return array($this->userRole->id() => $this->userRole);
+    return [$this->userRole->id() => $this->userRole];
   }
 
   /**
diff --git a/core/modules/user/src/PermissionHandler.php b/core/modules/user/src/PermissionHandler.php
index d7179b65ec631a7e8746c08328365d0b4b74e290..1f07b25d9509e2a0e618713fbe0c51cd8a628cbe 100644
--- a/core/modules/user/src/PermissionHandler.php
+++ b/core/modules/user/src/PermissionHandler.php
@@ -136,8 +136,8 @@ public function moduleProvidesPermissions($module_name) {
    *   - provider: The provider of the permission.
    */
   protected function buildPermissionsYaml() {
-    $all_permissions = array();
-    $all_callback_permissions = array();
+    $all_permissions = [];
+    $all_callback_permissions = [];
 
     foreach ($this->getYamlDiscovery()->findAll() as $provider => $permissions) {
       // The top-level 'permissions_callback' is a list of methods in controller
@@ -151,15 +151,15 @@ protected function buildPermissionsYaml() {
             // defaults can then get processed below.
             foreach ($callback_permissions as $name => $callback_permission) {
               if (!is_array($callback_permission)) {
-                $callback_permission = array(
+                $callback_permission = [
                   'title' => $callback_permission,
-                );
+                ];
               }
 
-              $callback_permission += array(
+              $callback_permission += [
                 'description' => NULL,
                 'provider' => $provider,
-              );
+              ];
 
               $all_callback_permissions[$name] = $callback_permission;
             }
@@ -171,9 +171,9 @@ protected function buildPermissionsYaml() {
 
       foreach ($permissions as &$permission) {
         if (!is_array($permission)) {
-          $permission = array(
+          $permission = [
             'title' => $permission,
-          );
+          ];
         }
         $permission['title'] = $this->t($permission['title']);
         $permission['description'] = isset($permission['description']) ? $this->t($permission['description']) : NULL;
@@ -198,7 +198,7 @@ protected function buildPermissionsYaml() {
    *   - description: The description of the permission, defaults to NULL.
    *   - provider: The provider of the permission.
    */
-  protected function sortPermissions(array $all_permissions = array()) {
+  protected function sortPermissions(array $all_permissions = []) {
     // Get a list of all the modules providing permissions and sort by
     // display name.
     $modules = $this->getModuleNames();
@@ -221,7 +221,7 @@ protected function sortPermissions(array $all_permissions = array()) {
    *   Returns the human readable names of all modules keyed by machine name.
    */
   protected function getModuleNames() {
-    $modules = array();
+    $modules = [];
     foreach (array_keys($this->moduleHandler->getModuleList()) as $module) {
       $modules[$module] = $this->moduleHandler->getName($module);
     }
diff --git a/core/modules/user/src/Plugin/Action/CancelUser.php b/core/modules/user/src/Plugin/Action/CancelUser.php
index 7c51f5fe1667656bd5c8d4bca4a7fa044051c916..140ef42e2f29c4ed85b01c742d6fc68dfd599d28 100644
--- a/core/modules/user/src/Plugin/Action/CancelUser.php
+++ b/core/modules/user/src/Plugin/Action/CancelUser.php
@@ -79,7 +79,7 @@ public function executeMultiple(array $entities) {
    * {@inheritdoc}
    */
   public function execute($object = NULL) {
-    $this->executeMultiple(array($object));
+    $this->executeMultiple([$object]);
   }
 
   /**
diff --git a/core/modules/user/src/Plugin/Action/ChangeUserRoleBase.php b/core/modules/user/src/Plugin/Action/ChangeUserRoleBase.php
index 02424bc3f4465ddc00deae6772ee00bac29e5ae6..de4c4040fecb41e9ba1167e0b4026971b3e78ee3 100644
--- a/core/modules/user/src/Plugin/Action/ChangeUserRoleBase.php
+++ b/core/modules/user/src/Plugin/Action/ChangeUserRoleBase.php
@@ -49,9 +49,9 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
+    return [
       'rid' => '',
-    );
+    ];
   }
 
   /**
@@ -60,13 +60,13 @@ public function defaultConfiguration() {
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     $roles = user_role_names(TRUE);
     unset($roles[RoleInterface::AUTHENTICATED_ID]);
-    $form['rid'] = array(
+    $form['rid'] = [
       '#type' => 'radios',
       '#title' => t('Role'),
       '#options' => $roles,
       '#default_value' => $this->configuration['rid'],
       '#required' => TRUE,
-    );
+    ];
     return $form;
   }
 
diff --git a/core/modules/user/src/Plugin/Block/UserLoginBlock.php b/core/modules/user/src/Plugin/Block/UserLoginBlock.php
index d7ff9da73c83bb7902ade53dbf6e169c86af8900..ed0e2eaf1a8a7e12dac4ab85fe28ff52f50d6609 100644
--- a/core/modules/user/src/Plugin/Block/UserLoginBlock.php
+++ b/core/modules/user/src/Plugin/Block/UserLoginBlock.php
@@ -72,7 +72,7 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   protected function blockAccess(AccountInterface $account) {
     $route_name = $this->routeMatch->getRouteName();
-    if ($account->isAnonymous() && !in_array($route_name, array('user.login', 'user.logout'))) {
+    if ($account->isAnonymous() && !in_array($route_name, ['user.login', 'user.logout'])) {
       return AccessResult::allowed()
         ->addCacheContexts(['route.name', 'user.roles:anonymous']);
     }
@@ -96,7 +96,7 @@ public function build() {
     $form['pass']['#size'] = 15;
     $form['#action'] = $this->url('<current>', [], ['query' => $this->getDestinationArray(), 'external' => FALSE]);
     // Build action links.
-    $items = array();
+    $items = [];
     if (\Drupal::config('user.settings')->get('register') != USER_REGISTER_ADMINISTRATORS_ONLY) {
       $items['create_account'] = [
         '#type' => 'link',
@@ -119,13 +119,13 @@ public function build() {
         ],
       ]),
     ];
-    return array(
+    return [
       'user_login_form' => $form,
-      'user_links' => array(
+      'user_links' => [
         '#theme' => 'item_list',
         '#items' => $items,
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/user/src/Plugin/Condition/UserRole.php b/core/modules/user/src/Plugin/Condition/UserRole.php
index ea69e143216b5c097a3e0e46e733643d3bbe3fc5..60b8b0e29c33c28eb2c8b56d8decf3cf434a11b0 100644
--- a/core/modules/user/src/Plugin/Condition/UserRole.php
+++ b/core/modules/user/src/Plugin/Condition/UserRole.php
@@ -22,13 +22,13 @@ class UserRole extends ConditionPluginBase {
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form['roles'] = array(
+    $form['roles'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('When the user has the following roles'),
       '#default_value' => $this->configuration['roles'],
       '#options' => array_map('\Drupal\Component\Utility\Html::escape', user_role_names()),
       '#description' => $this->t('If you select no roles, the condition will evaluate to TRUE for all users.'),
-    );
+    ];
     return parent::buildConfigurationForm($form, $form_state);
   }
 
@@ -36,9 +36,9 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array(
-      'roles' => array(),
-    ) + parent::defaultConfiguration();
+    return [
+      'roles' => [],
+    ] + parent::defaultConfiguration();
   }
 
   /**
@@ -62,10 +62,10 @@ public function summary() {
       $roles = reset($roles);
     }
     if (!empty($this->configuration['negate'])) {
-      return $this->t('The user is not a member of @roles', array('@roles' => $roles));
+      return $this->t('The user is not a member of @roles', ['@roles' => $roles]);
     }
     else {
-      return $this->t('The user is a member of @roles', array('@roles' => $roles));
+      return $this->t('The user is a member of @roles', ['@roles' => $roles]);
     }
   }
 
diff --git a/core/modules/user/src/Plugin/EntityReferenceSelection/UserSelection.php b/core/modules/user/src/Plugin/EntityReferenceSelection/UserSelection.php
index 6043c37208e185fb553917c5c11fc4e10ad2c7f1..feec81b46828f21832fca80f952857ea76eeadd8 100644
--- a/core/modules/user/src/Plugin/EntityReferenceSelection/UserSelection.php
+++ b/core/modules/user/src/Plugin/EntityReferenceSelection/UserSelection.php
@@ -87,51 +87,51 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $selection_handler_settings = $this->configuration['handler_settings'];
 
     // Merge in default values.
-    $selection_handler_settings += array(
-      'filter' => array(
+    $selection_handler_settings += [
+      'filter' => [
         'type' => '_none',
-      ),
+      ],
       'include_anonymous' => TRUE,
-    );
+    ];
 
-    $form['include_anonymous'] = array(
+    $form['include_anonymous'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Include the anonymous user.'),
       '#default_value' => $selection_handler_settings['include_anonymous'],
-    );
+    ];
 
     // Add user specific filter options.
-    $form['filter']['type'] = array(
+    $form['filter']['type'] = [
       '#type' => 'select',
       '#title' => $this->t('Filter by'),
-      '#options' => array(
+      '#options' => [
         '_none' => $this->t('- None -'),
         'role' => $this->t('User role'),
-      ),
+      ],
       '#ajax' => TRUE,
-      '#limit_validation_errors' => array(),
+      '#limit_validation_errors' => [],
       '#default_value' => $selection_handler_settings['filter']['type'],
-    );
+    ];
 
-    $form['filter']['settings'] = array(
+    $form['filter']['settings'] = [
       '#type' => 'container',
-      '#attributes' => array('class' => array('entity_reference-settings')),
-      '#process' => array(array('\Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem', 'formProcessMergeParent')),
-    );
+      '#attributes' => ['class' => ['entity_reference-settings']],
+      '#process' => [['\Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem', 'formProcessMergeParent']],
+    ];
 
     if ($selection_handler_settings['filter']['type'] == 'role') {
       // Merge in default values.
-      $selection_handler_settings['filter'] += array(
+      $selection_handler_settings['filter'] += [
         'role' => NULL,
-      );
+      ];
 
-      $form['filter']['settings']['role'] = array(
+      $form['filter']['settings']['role'] = [
         '#type' => 'checkboxes',
         '#title' => $this->t('Restrict to the selected roles'),
         '#required' => TRUE,
-        '#options' => array_diff_key(user_role_names(TRUE), array(RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID)),
+        '#options' => array_diff_key(user_role_names(TRUE), [RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID]),
         '#default_value' => $selection_handler_settings['filter']['role'],
-      );
+      ];
     }
 
     $form += parent::buildConfigurationForm($form, $form_state);
@@ -240,7 +240,7 @@ public function entityQueryAlter(SelectInterface $query) {
           $value_part->condition('anonymous_name', $condition['value'], $condition['operator']);
           $value_part->compile($this->connection, $query);
           $or->condition((new Condition('AND'))
-            ->where(str_replace('anonymous_name', ':anonymous_name', (string) $value_part), $value_part->arguments() + array(':anonymous_name' => \Drupal::config('user.settings')->get('anonymous')))
+            ->where(str_replace('anonymous_name', ':anonymous_name', (string) $value_part), $value_part->arguments() + [':anonymous_name' => \Drupal::config('user.settings')->get('anonymous')])
             ->condition('base_table.uid', 0)
           );
           $query->condition($or);
diff --git a/core/modules/user/src/Plugin/Field/FieldFormatter/AuthorFormatter.php b/core/modules/user/src/Plugin/Field/FieldFormatter/AuthorFormatter.php
index ede1615e5dfccecfd6e66a0ac23781f8b7c7ab1d..9f74d67d0915f0dc69edec03d702eb774bdb30fa 100644
--- a/core/modules/user/src/Plugin/Field/FieldFormatter/AuthorFormatter.php
+++ b/core/modules/user/src/Plugin/Field/FieldFormatter/AuthorFormatter.php
@@ -25,18 +25,18 @@ class AuthorFormatter extends EntityReferenceFormatterBase {
    * {@inheritdoc}
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
-    $elements = array();
+    $elements = [];
 
     foreach ($this->getEntitiesToView($items, $langcode) as $delta => $entity) {
       /** @var $referenced_user \Drupal\user\UserInterface */
-      $elements[$delta] = array(
+      $elements[$delta] = [
         '#theme' => 'username',
         '#account' => $entity,
-        '#link_options' => array('attributes' => array('rel' => 'author')),
-        '#cache' => array(
+        '#link_options' => ['attributes' => ['rel' => 'author']],
+        '#cache' => [
           'tags' => $entity->getCacheTags(),
-        ),
-      );
+        ],
+      ];
     }
 
     return $elements;
diff --git a/core/modules/user/src/Plugin/Search/UserSearch.php b/core/modules/user/src/Plugin/Search/UserSearch.php
index f8471211d7a765fb6bf09d7267b9cebef0e49aa2..063d3ef112252afaaba68917787fdc9974aad6ef 100644
--- a/core/modules/user/src/Plugin/Search/UserSearch.php
+++ b/core/modules/user/src/Plugin/Search/UserSearch.php
@@ -104,7 +104,7 @@ public function access($operation = 'view', AccountInterface $account = NULL, $r
    * {@inheritdoc}
    */
   public function execute() {
-    $results = array();
+    $results = [];
     if (!$this->isSearchExecutable()) {
       return $results;
     }
@@ -120,12 +120,12 @@ public function execute() {
     $query = $this->database
       ->select('users_field_data', 'users')
       ->extend('Drupal\Core\Database\Query\PagerSelectExtender');
-    $query->fields('users', array('uid'));
+    $query->fields('users', ['uid']);
     $query->condition('default_langcode', 1);
     if ($this->currentUser->hasPermission('administer users')) {
       // Administrators can also search in the otherwise private email field,
       // and they don't need to be restricted to only active users.
-      $query->fields('users', array('mail'));
+      $query->fields('users', ['mail']);
       $query->condition($query->orConditionGroup()
         ->condition('name', '%' . $keys . '%', 'LIKE')
         ->condition('mail', '%' . $keys . '%', 'LIKE')
@@ -144,10 +144,10 @@ public function execute() {
     $accounts = $this->entityManager->getStorage('user')->loadMultiple($uids);
 
     foreach ($accounts as $account) {
-      $result = array(
+      $result = [
         'title' => $account->getDisplayName(),
-        'link' => $account->url('canonical', array('absolute' => TRUE)),
-      );
+        'link' => $account->url('canonical', ['absolute' => TRUE]),
+      ];
       if ($this->currentUser->hasPermission('administer users')) {
         $result['title'] .= ' (' . $account->getEmail() . ')';
       }
@@ -162,13 +162,13 @@ public function execute() {
    * {@inheritdoc}
    */
   public function getHelp() {
-    $help = array('list' => array(
+    $help = ['list' => [
       '#theme' => 'item_list',
-      '#items' => array(
+      '#items' => [
         $this->t('User search looks for user names and partial user names. Example: mar would match usernames mar, delmar, and maryjane.'),
         $this->t('You can use * as a wildcard within your keyword. Example: m*r would match user names mar, delmar, and elementary.'),
-      ),
-    ));
+      ],
+    ]];
 
     return $help;
   }
diff --git a/core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php b/core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php
index 2bfdca4cabe4b56a53722dacf8bf97344877c4e0..a8b12af8f440b3e40ef2b242a02e9f3b6188cac4 100644
--- a/core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php
+++ b/core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php
@@ -86,7 +86,7 @@ public function validate($items, Constraint $constraint) {
         $changed = $items->getValue() != $account_unchanged->get($field->getName())->getValue();
       }
       if ($changed && (!$account->checkExistingPassword($account_unchanged))) {
-        $this->context->addViolation($constraint->message, array('%name' => $field->getLabel()));
+        $this->context->addViolation($constraint->message, ['%name' => $field->getLabel()]);
       }
     }
   }
diff --git a/core/modules/user/src/Plugin/Validation/Constraint/UserNameConstraintValidator.php b/core/modules/user/src/Plugin/Validation/Constraint/UserNameConstraintValidator.php
index fa714646b3c1f0c9d097790287c29018590bc608..9e4776bdcaf80fcc97baf1b25e8a5efd4f191116 100644
--- a/core/modules/user/src/Plugin/Validation/Constraint/UserNameConstraintValidator.php
+++ b/core/modules/user/src/Plugin/Validation/Constraint/UserNameConstraintValidator.php
@@ -54,7 +54,7 @@ public function validate($items, Constraint $constraint) {
       $this->context->addViolation($constraint->illegalMessage);
     }
     if (Unicode::strlen($name) > USERNAME_MAX_LENGTH) {
-      $this->context->addViolation($constraint->tooLongMessage, array('%name' => $name, '%max' => USERNAME_MAX_LENGTH));
+      $this->context->addViolation($constraint->tooLongMessage, ['%name' => $name, '%max' => USERNAME_MAX_LENGTH]);
     }
   }
 
diff --git a/core/modules/user/src/Plugin/migrate/destination/EntityUser.php b/core/modules/user/src/Plugin/migrate/destination/EntityUser.php
index b11d8670b9ef55431f064b77b64988da15fb66b6..7c2c81af969c6f9940c5dab54c363c9e6f00deb1 100644
--- a/core/modules/user/src/Plugin/migrate/destination/EntityUser.php
+++ b/core/modules/user/src/Plugin/migrate/destination/EntityUser.php
@@ -77,7 +77,7 @@ public static function create(ContainerInterface $container, array $configuratio
    * {@inheritdoc}
    * @throws \Drupal\migrate\MigrateException
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     // Do not overwrite the root account password.
     if ($row->getDestinationProperty('uid') == 1) {
       $row->removeDestinationProperty('pass');
@@ -88,7 +88,7 @@ public function import(Row $row, array $old_destination_id_values = array()) {
   /**
    * {@inheritdoc}
    */
-  protected function save(ContentEntityInterface $entity, array $old_destination_id_values = array()) {
+  protected function save(ContentEntityInterface $entity, array $old_destination_id_values = []) {
     // Do not overwrite the root account password.
     if ($entity->id() != 1) {
       // Set the pre_hashed password so that the PasswordItem field does not hash
diff --git a/core/modules/user/src/Plugin/migrate/destination/UserData.php b/core/modules/user/src/Plugin/migrate/destination/UserData.php
index 6ca60179aa586a5908328d9bc2144627ae534ee0..7c48f93e6d36d910db73d93f2f9f32a58a026ed6 100644
--- a/core/modules/user/src/Plugin/migrate/destination/UserData.php
+++ b/core/modules/user/src/Plugin/migrate/destination/UserData.php
@@ -56,7 +56,7 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function import(Row $row, array $old_destination_id_values = array()) {
+  public function import(Row $row, array $old_destination_id_values = []) {
     $uid = $row->getDestinationProperty('uid');
     $module = $row->getDestinationProperty('module');
     $key = $row->getDestinationProperty('key');
diff --git a/core/modules/user/src/Plugin/migrate/process/ConvertTokens.php b/core/modules/user/src/Plugin/migrate/process/ConvertTokens.php
index ce93c0e794a7c19b8e1b50055a6ea66aeb5e38ba..ed95db271570f299976541297186aeb42fde886e 100644
--- a/core/modules/user/src/Plugin/migrate/process/ConvertTokens.php
+++ b/core/modules/user/src/Plugin/migrate/process/ConvertTokens.php
@@ -21,7 +21,7 @@ class ConvertTokens extends ProcessPluginBase {
    * {@inheritdoc}
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
-    $tokens = array(
+    $tokens = [
       '!site' => '[site:name]',
       '!username' => '[user:name]',
       '!mailto' => '[user:mail]',
@@ -32,7 +32,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
       '!uri' => '[site:url]',
       '!date' => '[date:medium]',
       '!password' => '',
-    );
+    ];
 
     // Given that our source is a database column that could hold a NULL
     // value, sometimes that filters down to here. str_replace() cannot
diff --git a/core/modules/user/src/Plugin/migrate/process/ProfileFieldSettings.php b/core/modules/user/src/Plugin/migrate/process/ProfileFieldSettings.php
index 6230f7b7bb6a1db2986cdc5e04e06987238d2d52..6e16c59d5b272df4e89b604d80c0b2beee4de531 100644
--- a/core/modules/user/src/Plugin/migrate/process/ProfileFieldSettings.php
+++ b/core/modules/user/src/Plugin/migrate/process/ProfileFieldSettings.php
@@ -17,7 +17,7 @@ class ProfileFieldSettings extends ProcessPluginBase {
    * {@inheritdoc}
    */
   public function transform($type, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
-    $settings = array();
+    $settings = [];
     switch ($type) {
       case 'date':
         $settings['datetime_type'] = 'date';
diff --git a/core/modules/user/src/Plugin/migrate/process/UserUpdate8002.php b/core/modules/user/src/Plugin/migrate/process/UserUpdate8002.php
index 36f65741d9d400d0b73398e678d735d2ed533307..7a67c466e3fe84b6c6c8a0ec39fa964dfb39de2b 100644
--- a/core/modules/user/src/Plugin/migrate/process/UserUpdate8002.php
+++ b/core/modules/user/src/Plugin/migrate/process/UserUpdate8002.php
@@ -22,10 +22,10 @@ class UserUpdate8002 extends ProcessPluginBase {
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     $rid = $row->getSourceProperty('rid');
-    $map = array(
+    $map = [
       1 => 'anonymous',
       2 => 'authenticated',
-    );
+    ];
     return isset($map[$rid]) ? $map[$rid] : $value;
   }
 
diff --git a/core/modules/user/src/Plugin/migrate/source/ProfileField.php b/core/modules/user/src/Plugin/migrate/source/ProfileField.php
index c2a6fe447d4f5484b1c83b9c945f214da53607fd..151d5017def07c5fda890b7bd457247955e3330e 100644
--- a/core/modules/user/src/Plugin/migrate/source/ProfileField.php
+++ b/core/modules/user/src/Plugin/migrate/source/ProfileField.php
@@ -70,7 +70,7 @@ public function prepareRow(Row $row) {
       // D6 profile checkboxes values are always 0 or 1 (with no labels), so we
       // need to create two label-less options that will get 0 and 1 for their
       // keys.
-      $row->setSourceProperty('options', array(NULL, NULL));
+      $row->setSourceProperty('options', [NULL, NULL]);
     }
 
     return parent::prepareRow($row);
@@ -80,7 +80,7 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'fid' => $this->t('Primary Key: Unique profile field ID.'),
       'title' => $this->t('Title of the field shown to the end user.'),
       'name' => $this->t('Internal name of the field used in the form HTML and URLs.'),
@@ -94,7 +94,7 @@ public function fields() {
       'visibility' => $this->t('The level of visibility for the field. (0 = hidden, 1 = private, 2 = public on profile but not member list pages, 3 = public on profile and list pages)'),
       'autocomplete' => $this->t('Whether form auto-completion is enabled. (0 = disabled, 1 = enabled)'),
       'options' => $this->t('List of options to be used in a list selection field.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/user/src/Plugin/migrate/source/UserPictureInstance.php b/core/modules/user/src/Plugin/migrate/source/UserPictureInstance.php
index 746a76fd9917dc6ee15285134945f987455dee52..441fdc78c751a43d7a5b27cac9dd033ea7a705c7 100644
--- a/core/modules/user/src/Plugin/migrate/source/UserPictureInstance.php
+++ b/core/modules/user/src/Plugin/migrate/source/UserPictureInstance.php
@@ -22,24 +22,24 @@ class UserPictureInstance extends DrupalSqlBase {
    * {@inheritdoc}
    */
   public function initializeIterator() {
-    return new \ArrayIterator(array(
-      array(
+    return new \ArrayIterator([
+      [
         'id' => '',
         'file_directory' => $this->variableGet('user_picture_path', 'pictures'),
         'max_filesize' => $this->variableGet('user_picture_file_size', '30') . 'KB',
         'max_resolution' => $this->variableGet('user_picture_dimensions', '85x85'),
-      )));
+      ]]);
   }
 
   /**
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'file_directory' => 'The directory to store images..',
       'max_filesize' => 'The maximum allowed file size in KBs.',
       'max_resolution' => "The maximum resolution.",
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/user/src/Plugin/migrate/source/d6/ProfileFieldValues.php b/core/modules/user/src/Plugin/migrate/source/d6/ProfileFieldValues.php
index 0ccbbeb51d800a2161cb0a04bf000e7e8980890f..80db9df9696d4b541e4c5e8a1ab51762de8d4826 100644
--- a/core/modules/user/src/Plugin/migrate/source/d6/ProfileFieldValues.php
+++ b/core/modules/user/src/Plugin/migrate/source/d6/ProfileFieldValues.php
@@ -21,7 +21,7 @@ class ProfileFieldValues extends DrupalSqlBase {
   public function query() {
     $query = $this->select('profile_values', 'pv')
       ->distinct()
-      ->fields('pv', array('uid'));
+      ->fields('pv', ['uid']);
 
     return $query;
   }
@@ -32,9 +32,9 @@ public function query() {
   public function prepareRow(Row $row) {
     // Find profile values for this row.
     $query = $this->select('profile_values', 'pv')
-      ->fields('pv', array('fid', 'value'));
+      ->fields('pv', ['fid', 'value']);
     $query->leftJoin('profile_fields', 'pf', 'pf.fid=pv.fid');
-    $query->fields('pf', array('name', 'type'));
+    $query->fields('pf', ['name', 'type']);
     $query->condition('uid', $row->getSourceProperty('uid'));
     $results = $query->execute();
 
@@ -43,14 +43,14 @@ public function prepareRow(Row $row) {
       if ($profile_value['type'] == 'date') {
         $date = unserialize($profile_value['value']);
         $date = date('Y-m-d', mktime(0, 0, 0, $date['month'], $date['day'], $date['year']));
-        $row->setSourceProperty($profile_value['name'], array('value' => $date));
+        $row->setSourceProperty($profile_value['name'], ['value' => $date]);
       }
       elseif ($profile_value['type'] == 'list') {
         // Explode by newline and comma.
         $row->setSourceProperty($profile_value['name'], preg_split("/[\r\n,]+/", $profile_value['value']));
       }
       else {
-        $row->setSourceProperty($profile_value['name'], array($profile_value['value']));
+        $row->setSourceProperty($profile_value['name'], [$profile_value['value']]);
       }
     }
 
@@ -61,16 +61,16 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'fid' => $this->t('Unique profile field ID.'),
       'uid' => $this->t('The user Id.'),
       'value' => $this->t('The value for this field.'),
-    );
+    ];
 
     $query = $this->select('profile_values', 'pv')
-      ->fields('pv', array('fid', 'value'));
+      ->fields('pv', ['fid', 'value']);
     $query->leftJoin('profile_fields', 'pf', 'pf.fid=pv.fid');
-    $query->fields('pf', array('name', 'title'));
+    $query->fields('pf', ['name', 'title']);
     $results = $query->execute();
     foreach ($results as $profile) {
       $fields[$profile['name']] = $this->t($profile['title']);
@@ -83,12 +83,12 @@ public function fields() {
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'uid' => array(
+    return [
+      'uid' => [
         'type' => 'integer',
         'alias' => 'pv',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/user/src/Plugin/migrate/source/d6/Role.php b/core/modules/user/src/Plugin/migrate/source/d6/Role.php
index 2357c5c860e4621464577c8df334ba181f8e451e..82ad3e99325681fa45d799e2d846286665c5e22b 100644
--- a/core/modules/user/src/Plugin/migrate/source/d6/Role.php
+++ b/core/modules/user/src/Plugin/migrate/source/d6/Role.php
@@ -19,14 +19,14 @@ class Role extends DrupalSqlBase {
    *
    * @var array
    */
-  protected $filterPermissions = array();
+  protected $filterPermissions = [];
 
   /**
    * {@inheritdoc}
    */
   public function query() {
     $query = $this->select('role', 'r')
-      ->fields('r', array('rid', 'name'))
+      ->fields('r', ['rid', 'name'])
       ->orderBy('r.rid');
     return $query;
   }
@@ -35,10 +35,10 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'rid' => $this->t('Role ID.'),
       'name' => $this->t('The name of the user role.'),
-    );
+    ];
   }
 
   /**
@@ -46,7 +46,7 @@ public function fields() {
    */
   protected function initializeIterator() {
     $filter_roles = $this->select('filter_formats', 'f')
-      ->fields('f', array('format', 'roles'))
+      ->fields('f', ['format', 'roles'])
       ->execute()
       ->fetchAllKeyed();
     foreach ($filter_roles as $format => $roles) {
@@ -65,7 +65,7 @@ protected function initializeIterator() {
   public function prepareRow(Row $row) {
     $rid = $row->getSourceProperty('rid');
     $permissions = $this->select('permission', 'p')
-      ->fields('p', array('perm'))
+      ->fields('p', ['perm'])
       ->condition('rid', $rid)
       ->execute()
       ->fetchField();
diff --git a/core/modules/user/src/Plugin/migrate/source/d6/User.php b/core/modules/user/src/Plugin/migrate/source/d6/User.php
index 56f68bf8c80220ce1cef53ad3d9487d097465308..c8e9d19a702fdf99c155b0e11053cf85a1dffb44 100644
--- a/core/modules/user/src/Plugin/migrate/source/d6/User.php
+++ b/core/modules/user/src/Plugin/migrate/source/d6/User.php
@@ -35,7 +35,7 @@ public function fields() {
     // Profile fields.
     if ($this->moduleExists('profile')) {
       $fields += $this->select('profile_fields', 'pf')
-        ->fields('pf', array('name', 'title'))
+        ->fields('pf', ['name', 'title'])
         ->execute()
         ->fetchAllKeyed();
     }
@@ -49,7 +49,7 @@ public function fields() {
   public function prepareRow(Row $row) {
     // User roles.
     $roles = $this->select('users_roles', 'ur')
-      ->fields('ur', array('rid'))
+      ->fields('ur', ['rid'])
       ->condition('ur.uid', $row->getSourceProperty('uid'))
       ->execute()
       ->fetchCol();
@@ -60,7 +60,7 @@ public function prepareRow(Row $row) {
     if ($row->hasSourceProperty('timezone_id') && $row->getSourceProperty('timezone_id')) {
       if ($this->getDatabase()->schema()->tableExists('event_timezones')) {
         $event_timezone = $this->select('event_timezones', 'e')
-          ->fields('e', array('name'))
+          ->fields('e', ['name'])
           ->condition('e.timezone', $row->getSourceProperty('timezone_id'))
           ->execute()
           ->fetchField();
@@ -80,12 +80,12 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'uid' => array(
+    return [
+      'uid' => [
         'type' => 'integer',
         'alias' => 'u',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -95,7 +95,7 @@ public function getIds() {
    *   Associative array having field name as key and description as value.
    */
   protected function baseFields() {
-    $fields = array(
+    $fields = [
       'uid' => $this->t('User ID'),
       'name' => $this->t('Username'),
       'pass' => $this->t('Password'),
@@ -112,7 +112,7 @@ protected function baseFields() {
       'picture' => $this->t('Picture'),
       'init' => $this->t('Init'),
       'data' => $this->t('User data'),
-    );
+    ];
 
     // Possible field added by Date contributed module.
     // @see https://api.drupal.org/api/drupal/modules%21user%21user.install/function/user_update_7002/7
diff --git a/core/modules/user/src/Plugin/migrate/source/d6/UserPicture.php b/core/modules/user/src/Plugin/migrate/source/d6/UserPicture.php
index 13ae4f31dceefbbb8f1c7260bb3ea99b46d6cbcf..6b16ad4009dbd57a66e6c9187e2631c9c764a242 100644
--- a/core/modules/user/src/Plugin/migrate/source/d6/UserPicture.php
+++ b/core/modules/user/src/Plugin/migrate/source/d6/UserPicture.php
@@ -21,7 +21,7 @@ class UserPicture extends DrupalSqlBase {
   public function query() {
     $query = $this->select('users', 'u')
       ->condition('picture', '', '<>')
-      ->fields('u', array('uid', 'access', 'picture'))
+      ->fields('u', ['uid', 'access', 'picture'])
       ->orderBy('u.access');
     return $query;
   }
@@ -30,11 +30,11 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'uid' => 'Primary Key: Unique user ID.',
       'access' => 'Timestamp for previous time user accessed the site.',
       'picture' => "Path to the user's uploaded picture.",
-    );
+    ];
   }
   /**
    * {@inheritdoc}
diff --git a/core/modules/user/src/Plugin/migrate/source/d6/UserPictureFile.php b/core/modules/user/src/Plugin/migrate/source/d6/UserPictureFile.php
index d394e9c08f81ef88e0395d1d6b1f774cb22521e5..8952ffdf82bc65fb00c1460edfe463ffa5489fcf 100644
--- a/core/modules/user/src/Plugin/migrate/source/d6/UserPictureFile.php
+++ b/core/modules/user/src/Plugin/migrate/source/d6/UserPictureFile.php
@@ -34,7 +34,7 @@ class UserPictureFile extends DrupalSqlBase {
   public function query() {
     $query = $this->select('users', 'u')
       ->condition('u.picture', '', '<>')
-      ->fields('u', array('uid', 'picture'));
+      ->fields('u', ['uid', 'picture']);
     return $query;
   }
 
@@ -62,10 +62,10 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'picture' => "Path to the user's uploaded picture.",
       'filename' => 'The picture filename.',
-    );
+    ];
   }
   /**
    * {@inheritdoc}
diff --git a/core/modules/user/src/Plugin/migrate/source/d7/Role.php b/core/modules/user/src/Plugin/migrate/source/d7/Role.php
index 1067610e957e030f9c54e6a086570e276c6cf9a4..9245aab96998463f828a5fee70230cd56cfdaee7 100644
--- a/core/modules/user/src/Plugin/migrate/source/d7/Role.php
+++ b/core/modules/user/src/Plugin/migrate/source/d7/Role.php
@@ -25,11 +25,11 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    return array(
+    return [
       'rid' => $this->t('Role ID.'),
       'name' => $this->t('The name of the user role.'),
       'weight' => $this->t('The weight of the role.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/user/src/Plugin/migrate/source/d7/User.php b/core/modules/user/src/Plugin/migrate/source/d7/User.php
index 717e12028fbe00722bfbd9f9322c848e97b8d962..408d998803e737f9ae3412e89f26bf910d699eec 100644
--- a/core/modules/user/src/Plugin/migrate/source/d7/User.php
+++ b/core/modules/user/src/Plugin/migrate/source/d7/User.php
@@ -27,7 +27,7 @@ public function query() {
    * {@inheritdoc}
    */
   public function fields() {
-    $fields = array(
+    $fields = [
       'uid' => $this->t('User ID'),
       'name' => $this->t('Username'),
       'pass' => $this->t('Password'),
@@ -44,12 +44,12 @@ public function fields() {
       'init' => $this->t('Init'),
       'data' => $this->t('User data'),
       'roles' => $this->t('Roles'),
-    );
+    ];
 
     // Profile fields.
     if ($this->moduleExists('profile')) {
       $fields += $this->select('profile_fields', 'pf')
-        ->fields('pf', array('name', 'title'))
+        ->fields('pf', ['name', 'title'])
         ->execute()
         ->fetchAllKeyed();
     }
@@ -79,9 +79,9 @@ public function prepareRow(Row $row) {
     // ProfileFieldValues plugin.
     if ($this->getDatabase()->schema()->tableExists('profile_value')) {
       $query = $this->select('profile_value', 'pv')
-        ->fields('pv', array('fid', 'value'));
+        ->fields('pv', ['fid', 'value']);
       $query->leftJoin('profile_field', 'pf', 'pf.fid=pv.fid');
-      $query->fields('pf', array('name', 'type'));
+      $query->fields('pf', ['name', 'type']);
       $query->condition('uid', $row->getSourceProperty('uid'));
       $results = $query->execute();
 
@@ -89,14 +89,14 @@ public function prepareRow(Row $row) {
         if ($profile_value['type'] == 'date') {
           $date = unserialize($profile_value['value']);
           $date = date('Y-m-d', mktime(0, 0, 0, $date['month'], $date['day'], $date['year']));
-          $row->setSourceProperty($profile_value['name'], array('value' => $date));
+          $row->setSourceProperty($profile_value['name'], ['value' => $date]);
         }
         elseif ($profile_value['type'] == 'list') {
           // Explode by newline and comma.
           $row->setSourceProperty($profile_value['name'], preg_split("/[\r\n,]+/", $profile_value['value']));
         }
         else {
-          $row->setSourceProperty($profile_value['name'], array($profile_value['value']));
+          $row->setSourceProperty($profile_value['name'], [$profile_value['value']]);
         }
       }
     }
@@ -108,12 +108,12 @@ public function prepareRow(Row $row) {
    * {@inheritdoc}
    */
   public function getIds() {
-    return array(
-      'uid' => array(
+    return [
+      'uid' => [
         'type' => 'integer',
         'alias' => 'u',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/user/src/Plugin/views/access/Permission.php b/core/modules/user/src/Plugin/views/access/Permission.php
index d2d757bd91d3718121b9d3853d1ee1ff6a7c3556..8d0c43dfcef7fc05ce4376c4ce6dd4a6e2e49637 100644
--- a/core/modules/user/src/Plugin/views/access/Permission.php
+++ b/core/modules/user/src/Plugin/views/access/Permission.php
@@ -103,7 +103,7 @@ public function summaryTitle() {
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['perm'] = array('default' => 'access content');
+    $options['perm'] = ['default' => 'access content'];
 
     return $options;
   }
@@ -119,13 +119,13 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       $perms[$display_name][$perm] = strip_tags($perm_item['title']);
     }
 
-    $form['perm'] = array(
+    $form['perm'] = [
       '#type' => 'select',
       '#options' => $perms,
       '#title' => $this->t('Permission'),
       '#default_value' => $this->options['perm'],
       '#description' => $this->t('Only users with the selected permission flag will be able to access this display.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/user/src/Plugin/views/access/Role.php b/core/modules/user/src/Plugin/views/access/Role.php
index 2e5b6b4b0b0fd97a19dda24055a1ee6a66b687c9..e35daa1eea9359f4a244722f3a793fcfb955976f 100644
--- a/core/modules/user/src/Plugin/views/access/Role.php
+++ b/core/modules/user/src/Plugin/views/access/Role.php
@@ -99,31 +99,31 @@ public function summaryTitle() {
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['role'] = array('default' => array());
+    $options['role'] = ['default' => []];
 
     return $options;
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['role'] = array(
+    $form['role'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Role'),
       '#default_value' => $this->options['role'],
       '#options' => array_map('\Drupal\Component\Utility\Html::escape', user_role_names()),
       '#description' => $this->t('Only the checked roles will be able to access this display.'),
-    );
+    ];
   }
 
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
-    $role = $form_state->getValue(array('access_options', 'role'));
+    $role = $form_state->getValue(['access_options', 'role']);
     $role = array_filter($role);
 
     if (!$role) {
       $form_state->setError($form['role'], $this->t('You must select at least one role if type is "by role"'));
     }
 
-    $form_state->setValue(array('access_options', 'role'), $role);
+    $form_state->setValue(['access_options', 'role'], $role);
   }
 
   /**
diff --git a/core/modules/user/src/Plugin/views/argument/RolesRid.php b/core/modules/user/src/Plugin/views/argument/RolesRid.php
index a1bba79370591c128fe26f28bf4549d9296ef231..ff9bf5ec82b0bc091cb3e0250000a9a68dd9aa30 100644
--- a/core/modules/user/src/Plugin/views/argument/RolesRid.php
+++ b/core/modules/user/src/Plugin/views/argument/RolesRid.php
@@ -52,7 +52,7 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   public function titleQuery() {
     $entities = $this->roleStorage->loadMultiple($this->value);
-    $titles = array();
+    $titles = [];
     foreach ($entities as $entity) {
       $titles[] = $entity->label();
     }
diff --git a/core/modules/user/src/Plugin/views/argument_default/User.php b/core/modules/user/src/Plugin/views/argument_default/User.php
index 0d1d4458196375257d8bf72459ee1cded4db46b2..448f79c55df31effdd91be60d8d719c41d3bb3b4 100644
--- a/core/modules/user/src/Plugin/views/argument_default/User.php
+++ b/core/modules/user/src/Plugin/views/argument_default/User.php
@@ -64,7 +64,7 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['user'] = array('default' => '');
+    $options['user'] = ['default' => ''];
 
     return $options;
   }
@@ -73,11 +73,11 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['user'] = array(
+    $form['user'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Also look for a node and use the node author'),
       '#default_value' => $this->options['user'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/user/src/Plugin/views/argument_validator/User.php b/core/modules/user/src/Plugin/views/argument_validator/User.php
index fa61dbf662ca06babddbbd8e748887ace518652c..e7d213917b883aa541088102ce6d97d3bf3e4861 100644
--- a/core/modules/user/src/Plugin/views/argument_validator/User.php
+++ b/core/modules/user/src/Plugin/views/argument_validator/User.php
@@ -38,8 +38,8 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['restrict_roles'] = array('default' => FALSE);
-    $options['roles'] = array('default' => array());
+    $options['restrict_roles'] = ['default' => FALSE];
+    $options['roles'] = ['default' => []];
 
     return $options;
   }
@@ -51,30 +51,30 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
     $sanitized_id = ArgumentPluginBase::encodeValidatorId($this->definition['id']);
 
-    $form['restrict_roles'] = array(
+    $form['restrict_roles'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Restrict user based on role'),
       '#default_value' => $this->options['restrict_roles'],
-    );
+    ];
 
-    $form['roles'] = array(
+    $form['roles'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Restrict to the selected roles'),
-      '#options' => array_map(array('\Drupal\Component\Utility\Html', 'escape'), user_role_names(TRUE)),
+      '#options' => array_map(['\Drupal\Component\Utility\Html', 'escape'], user_role_names(TRUE)),
       '#default_value' => $this->options['roles'],
       '#description' => $this->t('If no roles are selected, users from any role will be allowed.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[validate][options][' . $sanitized_id . '][restrict_roles]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="options[validate][options][' . $sanitized_id . '][restrict_roles]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
-  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = array()) {
+  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = []) {
     // filter trash out of the options so we don't store giant unnecessary arrays
     $options['roles'] = array_filter($options['roles']);
   }
diff --git a/core/modules/user/src/Plugin/views/argument_validator/UserName.php b/core/modules/user/src/Plugin/views/argument_validator/UserName.php
index 88ffd64617262771a03ff82008732416df886392..8ef4999b342cf3fc016d4551f27cc97a56f3a3fa 100644
--- a/core/modules/user/src/Plugin/views/argument_validator/UserName.php
+++ b/core/modules/user/src/Plugin/views/argument_validator/UserName.php
@@ -23,10 +23,10 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     $entity_type = $this->entityManager->getDefinition('user');
 
-    $form['multiple']['#options'] = array(
-      0 => $this->t('Single name', array('%type' => $entity_type->getLabel())),
-      1 => $this->t('One or more names separated by , or +', array('%type' => $entity_type->getLabel())),
-    );
+    $form['multiple']['#options'] = [
+      0 => $this->t('Single name', ['%type' => $entity_type->getLabel()]),
+      1 => $this->t('One or more names separated by , or +', ['%type' => $entity_type->getLabel()]),
+    ];
   }
 
   /**
@@ -39,14 +39,14 @@ public function validateArgument($argument) {
       $names = array_filter(preg_split('/[,+ ]/', $argument));
     }
     elseif ($argument) {
-      $names = array($argument);
+      $names = [$argument];
     }
     // No specified argument should be invalid.
     else {
       return FALSE;
     }
 
-    $accounts = $this->userStorage->loadByProperties(array('name' => $names));
+    $accounts = $this->userStorage->loadByProperties(['name' => $names]);
 
     // If there are no accounts, return FALSE now. As we will not enter the
     // loop below otherwise.
diff --git a/core/modules/user/src/Plugin/views/field/Permissions.php b/core/modules/user/src/Plugin/views/field/Permissions.php
index c9d5a9f51394e63383e5af3be4a52ca32dc91642..ecba8df9309b6aa27663525e19344600bbd1fd9b 100644
--- a/core/modules/user/src/Plugin/views/field/Permissions.php
+++ b/core/modules/user/src/Plugin/views/field/Permissions.php
@@ -66,7 +66,7 @@ public static function create(ContainerInterface $container, array $configuratio
   public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
     parent::init($view, $display, $options);
 
-    $this->additional_fields['uid'] = array('table' => 'users_field_data', 'field' => 'uid');
+    $this->additional_fields['uid'] = ['table' => 'users_field_data', 'field' => 'uid'];
   }
 
   public function query() {
@@ -75,11 +75,11 @@ public function query() {
   }
 
   public function preRender(&$values) {
-    $this->items = array();
+    $this->items = [];
 
     $permission_names = \Drupal::service('user.permissions')->getPermissions();
 
-    $rids = array();
+    $rids = [];
     foreach ($values as $result) {
       $user_rids = $this->getEntity($result)->getRoles();
       $uid = $this->getValue($result);
diff --git a/core/modules/user/src/Plugin/views/field/Roles.php b/core/modules/user/src/Plugin/views/field/Roles.php
index 9d8edc04f0981c96af144fcc5b02a618858fd38b..bb7dc20977960f707ec0495dad9e89c132b946e9 100644
--- a/core/modules/user/src/Plugin/views/field/Roles.php
+++ b/core/modules/user/src/Plugin/views/field/Roles.php
@@ -55,7 +55,7 @@ public static function create(ContainerInterface $container, array $configuratio
   public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
     parent::init($view, $display, $options);
 
-    $this->additional_fields['uid'] = array('table' => 'users_field_data', 'field' => 'uid');
+    $this->additional_fields['uid'] = ['table' => 'users_field_data', 'field' => 'uid'];
   }
 
   public function query() {
@@ -64,8 +64,8 @@ public function query() {
   }
 
   public function preRender(&$values) {
-    $uids = array();
-    $this->items = array();
+    $uids = [];
+    $this->items = [];
 
     foreach ($values as $result) {
       $uids[] = $this->getValue($result);
@@ -73,7 +73,7 @@ public function preRender(&$values) {
 
     if ($uids) {
       $roles = user_roles();
-      $result = $this->database->query('SELECT u.entity_id as uid, u.roles_target_id as rid FROM {user__roles} u WHERE u.entity_id IN ( :uids[] ) AND u.roles_target_id IN ( :rids[] )', array(':uids[]' => $uids, ':rids[]' => array_keys($roles)));
+      $result = $this->database->query('SELECT u.entity_id as uid, u.roles_target_id as rid FROM {user__roles} u WHERE u.entity_id IN ( :uids[] ) AND u.roles_target_id IN ( :rids[] )', [':uids[]' => $uids, ':rids[]' => array_keys($roles)]);
       foreach ($result as $role) {
         $this->items[$role->uid][$role->rid]['role'] = $roles[$role->rid]->label();
         $this->items[$role->uid][$role->rid]['rid'] = $role->rid;
diff --git a/core/modules/user/src/Plugin/views/field/UserBulkForm.php b/core/modules/user/src/Plugin/views/field/UserBulkForm.php
index 57ae4370b4e536b8c59411a6052bbcbc2ffc5c75..3d0196a962170ba1a5b1c3190ac4edb0f2993e53 100644
--- a/core/modules/user/src/Plugin/views/field/UserBulkForm.php
+++ b/core/modules/user/src/Plugin/views/field/UserBulkForm.php
@@ -25,7 +25,7 @@ public function viewsForm(&$form, FormStateInterface $form_state) {
       foreach ($this->view->result as $row_index => $result) {
         $account = $result->_entity;
         if ($account instanceof UserInterface) {
-          $form[$this->options['id']][$row_index]['#title'] = $this->t('Update the user %name', array('%name' => $account->label()));
+          $form[$this->options['id']][$row_index]['#title'] = $this->t('Update the user %name', ['%name' => $account->label()]);
         }
       }
     }
diff --git a/core/modules/user/src/Plugin/views/field/UserData.php b/core/modules/user/src/Plugin/views/field/UserData.php
index b87346fc6c040533d3d351789d364728d9782dcb..365ab3b746a6a3b285855b4bd64d4e6ba3269867 100644
--- a/core/modules/user/src/Plugin/views/field/UserData.php
+++ b/core/modules/user/src/Plugin/views/field/UserData.php
@@ -58,8 +58,8 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['data_module'] = array('default' => '');
-    $options['data_name'] = array('default' => '');
+    $options['data_module'] = ['default' => ''];
+    $options['data_name'] = ['default' => ''];
 
     return $options;
   }
@@ -71,25 +71,25 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
     $modules = $this->moduleHandler->getModuleList();
-    $names = array();
+    $names = [];
     foreach (array_keys($modules) as $name) {
       $names[$name] = $this->moduleHandler->getName($name);
     }
 
-    $form['data_module'] = array(
+    $form['data_module'] = [
       '#title' => $this->t('Module name'),
       '#type' => 'select',
       '#description' => $this->t('The module which sets this user data.'),
       '#default_value' => $this->options['data_module'],
       '#options' => $names,
-    );
+    ];
 
-    $form['data_name'] = array(
+    $form['data_name'] = [
       '#title' => $this->t('Name'),
       '#type' => 'textfield',
       '#description' => $this->t('The name of the data key.'),
       '#default_value' => $this->options['data_name'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/user/src/Plugin/views/filter/Name.php b/core/modules/user/src/Plugin/views/filter/Name.php
index e241e876361cc66180883fbf9b3e54c6b9285308..f4260c5c0bda4aad056c19160fbb5556ed6a83ba 100644
--- a/core/modules/user/src/Plugin/views/filter/Name.php
+++ b/core/modules/user/src/Plugin/views/filter/Name.php
@@ -19,9 +19,9 @@ class Name extends InOperator {
   protected $alwaysMultiple = TRUE;
 
   protected function valueForm(&$form, FormStateInterface $form_state) {
-    $users = $this->value ? User::loadMultiple($this->value) : array();
+    $users = $this->value ? User::loadMultiple($this->value) : [];
     $default_value = EntityAutocomplete::getEntityLabels($users);
-    $form['value'] = array(
+    $form['value'] = [
       '#type' => 'entity_autocomplete',
       '#title' => $this->t('Usernames'),
       '#description' => $this->t('Enter a comma separated list of user names.'),
@@ -29,7 +29,7 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
       '#tags' => TRUE,
       '#default_value' => $default_value,
       '#process_default_value' => $this->isExposed(),
-    );
+    ];
 
     $user_input = $form_state->getUserInput();
     if ($form_state->get('exposed') && !isset($user_input[$this->options['expose']['identifier']])) {
@@ -40,13 +40,13 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
 
   protected function valueValidate($form, FormStateInterface $form_state) {
     $uids = [];
-    if ($values = $form_state->getValue(array('options', 'value'))) {
+    if ($values = $form_state->getValue(['options', 'value'])) {
       foreach ($values as $value) {
         $uids[] = $value['target_id'];
       }
       sort($uids);
     }
-    $form_state->setValue(array('options', 'value'), $uids);
+    $form_state->setValue(['options', 'value'], $uids);
   }
 
   public function acceptExposedInput($input) {
@@ -105,7 +105,7 @@ public function getValueOptions() {
 
   public function adminSummary() {
     // set up $this->valueOptions for the parent summary
-    $this->valueOptions = array();
+    $this->valueOptions = [];
 
     if ($this->value) {
       $result = \Drupal::entityTypeManager()->getStorage('user')
diff --git a/core/modules/user/src/Plugin/views/filter/Permissions.php b/core/modules/user/src/Plugin/views/filter/Permissions.php
index 7d444c681d0968b577fb3d72e905aa3f0cc336ee..7dd9171aa0b1078fb4ae153edb2eeb2a79244626 100644
--- a/core/modules/user/src/Plugin/views/filter/Permissions.php
+++ b/core/modules/user/src/Plugin/views/filter/Permissions.php
@@ -88,7 +88,7 @@ public function getValueOptions() {
    */
   public function query() {
     // @todo user_role_names() should maybe support multiple permissions.
-    $rids = array();
+    $rids = [];
     // Get all role IDs that have the configured permissions.
     foreach ($this->value as $permission) {
       $roles = user_role_names(FALSE, $permission);
diff --git a/core/modules/user/src/Plugin/views/filter/Roles.php b/core/modules/user/src/Plugin/views/filter/Roles.php
index 64074c3920e05caa245b9184f19998115578bfb9..b04e1b1f51742b5be8cbfa5e3220cbc5a5e2e484 100644
--- a/core/modules/user/src/Plugin/views/filter/Roles.php
+++ b/core/modules/user/src/Plugin/views/filter/Roles.php
@@ -73,7 +73,7 @@ function operators() {
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    $dependencies = array();
+    $dependencies = [];
     foreach ($this->value as $role_id) {
       $role = $this->roleStorage->load($role_id);
       $dependencies[$role->getConfigDependencyKey()][] = $role->getConfigDependencyName();
diff --git a/core/modules/user/src/Plugin/views/wizard/Users.php b/core/modules/user/src/Plugin/views/wizard/Users.php
index efd42723c797b2e2c82929988fc306db660402f9..081a509a2df274dc7c99a745077e9d164c801e61 100644
--- a/core/modules/user/src/Plugin/views/wizard/Users.php
+++ b/core/modules/user/src/Plugin/views/wizard/Users.php
@@ -27,16 +27,16 @@ class Users extends WizardPluginBase {
   /**
    * Set default values for the filters.
    */
-  protected $filters = array(
-    'status' => array(
+  protected $filters = [
+    'status' => [
       'value' => TRUE,
       'table' => 'users_field_data',
       'field' => 'status',
       'plugin_id' => 'boolean',
       'entity_type' => 'user',
       'entity_field' => 'status',
-    )
-  );
+    ]
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/user/src/PrivateTempStore.php b/core/modules/user/src/PrivateTempStore.php
index 1e73420bb5d2b86f6b089e9cc50fc456c0c7fdc3..651227c371661f47028f0b4a3f93df7fc2d642f8 100644
--- a/core/modules/user/src/PrivateTempStore.php
+++ b/core/modules/user/src/PrivateTempStore.php
@@ -125,11 +125,11 @@ public function set($key, $value) {
       }
     }
 
-    $value = (object) array(
+    $value = (object) [
       'owner' => $this->getOwner(),
       'data' => $value,
       'updated' => (int) $this->requestStack->getMasterRequest()->server->get('REQUEST_TIME'),
-    );
+    ];
     $this->storage->setWithExpire($key, $value, $this->expire);
     $this->lockBackend->release($key);
   }
diff --git a/core/modules/user/src/ProfileForm.php b/core/modules/user/src/ProfileForm.php
index fc80230fe51aa4ebe52f0bc5c2274989af50a978..343d4d0e060c28e23eb3235e90610d1819788269 100644
--- a/core/modules/user/src/ProfileForm.php
+++ b/core/modules/user/src/ProfileForm.php
@@ -22,7 +22,7 @@ protected function actions(array $form, FormStateInterface $form_state) {
     $user = $this->currentUser();
     $element['delete']['#type'] = 'submit';
     $element['delete']['#value'] = $this->t('Cancel account');
-    $element['delete']['#submit'] = array('::editCancelSubmit');
+    $element['delete']['#submit'] = ['::editCancelSubmit'];
     $element['delete']['#access'] = $account->id() > 1 && (($account->id() == $user->id() && $user->hasPermission('cancel account')) || $user->hasPermission('administer users'));
 
     return $element;
@@ -43,17 +43,17 @@ public function save(array $form, FormStateInterface $form_state) {
    * Provides a submit handler for the 'Cancel account' button.
    */
   public function editCancelSubmit($form, FormStateInterface $form_state) {
-    $destination = array();
+    $destination = [];
     $query = $this->getRequest()->query;
     if ($query->has('destination')) {
-      $destination = array('destination' => $query->get('destination'));
+      $destination = ['destination' => $query->get('destination')];
       $query->remove('destination');
     }
     // We redirect from user/%/edit to user/%/cancel to make the tabs disappear.
     $form_state->setRedirect(
       'entity.user.cancel_form',
-      array('user' => $this->entity->id()),
-      array('query' => $destination)
+      ['user' => $this->entity->id()],
+      ['query' => $destination]
     );
   }
 
diff --git a/core/modules/user/src/ProfileTranslationHandler.php b/core/modules/user/src/ProfileTranslationHandler.php
index d981f99f6c023d4e827d8bb5a40bf785840273d1..5b469525a4a25d3e1239f929501459fe15ca10b6 100644
--- a/core/modules/user/src/ProfileTranslationHandler.php
+++ b/core/modules/user/src/ProfileTranslationHandler.php
@@ -32,7 +32,7 @@ protected function hasCreatedTime() {
    */
   public function entityFormAlter(array &$form, FormStateInterface $form_state, EntityInterface $entity) {
     parent::entityFormAlter($form, $form_state, $entity);
-    $form['actions']['submit']['#submit'][] = array($this, 'entityFormSave');
+    $form['actions']['submit']['#submit'][] = [$this, 'entityFormSave'];
   }
 
   /**
diff --git a/core/modules/user/src/RegisterForm.php b/core/modules/user/src/RegisterForm.php
index 9bc047b581f7ab1cab5c50214afd0896077bfb66..7a97974fb2ddf05514f6b39258dee21a32b7a7c0 100644
--- a/core/modules/user/src/RegisterForm.php
+++ b/core/modules/user/src/RegisterForm.php
@@ -20,10 +20,10 @@ public function form(array $form, FormStateInterface $form_state) {
     // Pass access information to the submit handler. Running an access check
     // inside the submit function interferes with form processing and breaks
     // hook_form_alter().
-    $form['administer_users'] = array(
+    $form['administer_users'] = [
       '#type' => 'value',
       '#value' => $admin,
-    );
+    ];
 
     $form['#attached']['library'][] = 'core/drupal.form';
 
@@ -94,14 +94,14 @@ public function save(array $form, FormStateInterface $form_state) {
     $form_state->set('user', $account);
     $form_state->setValue('uid', $account->id());
 
-    $this->logger('user')->notice('New user: %name %email.', array('%name' => $form_state->getValue('name'), '%email' => '<' . $form_state->getValue('mail') . '>', 'type' => $account->link($this->t('Edit'), 'edit-form')));
+    $this->logger('user')->notice('New user: %name %email.', ['%name' => $form_state->getValue('name'), '%email' => '<' . $form_state->getValue('mail') . '>', 'type' => $account->link($this->t('Edit'), 'edit-form')]);
 
     // Add plain text password into user account to generate mail tokens.
     $account->password = $pass;
 
     // New administrative account without notification.
     if ($admin && !$notify) {
-      drupal_set_message($this->t('Created a new user account for <a href=":url">%name</a>. No email has been sent.', array(':url' => $account->url(), '%name' => $account->getUsername())));
+      drupal_set_message($this->t('Created a new user account for <a href=":url">%name</a>. No email has been sent.', [':url' => $account->url(), '%name' => $account->getUsername()]));
     }
     // No email verification required; log in user immediately.
     elseif (!$admin && !\Drupal::config('user.settings')->get('verify_mail') && $account->isActive()) {
@@ -113,13 +113,13 @@ public function save(array $form, FormStateInterface $form_state) {
     // No administrator approval required.
     elseif ($account->isActive() || $notify) {
       if (!$account->getEmail() && $notify) {
-        drupal_set_message($this->t('The new user <a href=":url">%name</a> was created without an email address, so no welcome message was sent.', array(':url' => $account->url(), '%name' => $account->getUsername())));
+        drupal_set_message($this->t('The new user <a href=":url">%name</a> was created without an email address, so no welcome message was sent.', [':url' => $account->url(), '%name' => $account->getUsername()]));
       }
       else {
         $op = $notify ? 'register_admin_created' : 'register_no_approval_required';
         if (_user_mail_notify($op, $account)) {
           if ($notify) {
-            drupal_set_message($this->t('A welcome message with further instructions has been emailed to the new user <a href=":url">%name</a>.', array(':url' => $account->url(), '%name' => $account->getUsername())));
+            drupal_set_message($this->t('A welcome message with further instructions has been emailed to the new user <a href=":url">%name</a>.', [':url' => $account->url(), '%name' => $account->getUsername()]));
           }
           else {
             drupal_set_message($this->t('A welcome message with further instructions has been sent to your email address.'));
diff --git a/core/modules/user/src/RoleForm.php b/core/modules/user/src/RoleForm.php
index 3199c45aa564050ca8eb9841355151bdf7573b05..7e7885354b9b2720d033b73c1111117f74d278f0 100644
--- a/core/modules/user/src/RoleForm.php
+++ b/core/modules/user/src/RoleForm.php
@@ -15,7 +15,7 @@ class RoleForm extends EntityForm {
    */
   public function form(array $form, FormStateInterface $form_state) {
     $entity = $this->entity;
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Role name'),
       '#default_value' => $entity->label(),
@@ -23,22 +23,22 @@ public function form(array $form, FormStateInterface $form_state) {
       '#required' => TRUE,
       '#maxlength' => 64,
       '#description' => $this->t('The name for this role. Example: "Moderator", "Editorial board", "Site architect".'),
-    );
-    $form['id'] = array(
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
       '#default_value' => $entity->id(),
       '#required' => TRUE,
       '#disabled' => !$entity->isNew(),
       '#size' => 30,
       '#maxlength' => 64,
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => ['\Drupal\user\Entity\Role', 'load'],
-      ),
-    );
-    $form['weight'] = array(
+      ],
+    ];
+    $form['weight'] = [
       '#type' => 'value',
       '#value' => $entity->getWeight(),
-    );
+    ];
 
     return parent::form($form, $form_state, $entity);
   }
@@ -55,12 +55,12 @@ public function save(array $form, FormStateInterface $form_state) {
 
     $edit_link = $this->entity->link($this->t('Edit'));
     if ($status == SAVED_UPDATED) {
-      drupal_set_message($this->t('Role %label has been updated.', array('%label' => $entity->label())));
-      $this->logger('user')->notice('Role %label has been updated.', array('%label' => $entity->label(), 'link' => $edit_link));
+      drupal_set_message($this->t('Role %label has been updated.', ['%label' => $entity->label()]));
+      $this->logger('user')->notice('Role %label has been updated.', ['%label' => $entity->label(), 'link' => $edit_link]);
     }
     else {
-      drupal_set_message($this->t('Role %label has been added.', array('%label' => $entity->label())));
-      $this->logger('user')->notice('Role %label has been added.', array('%label' => $entity->label(), 'link' => $edit_link));
+      drupal_set_message($this->t('Role %label has been added.', ['%label' => $entity->label()]));
+      $this->logger('user')->notice('Role %label has been added.', ['%label' => $entity->label(), 'link' => $edit_link]);
     }
     $form_state->setRedirect('entity.user_role.collection');
   }
diff --git a/core/modules/user/src/RoleListBuilder.php b/core/modules/user/src/RoleListBuilder.php
index 16bd92cd6a1aa281f45dafaaf6dd693e91ef4c61..aa3b844fd3659f8d3e5a47b191300c4f81f0e963 100644
--- a/core/modules/user/src/RoleListBuilder.php
+++ b/core/modules/user/src/RoleListBuilder.php
@@ -43,11 +43,11 @@ public function getDefaultOperations(EntityInterface $entity) {
     $operations = parent::getDefaultOperations($entity);
 
     if ($entity->hasLinkTemplate('edit-permissions-form')) {
-      $operations['permissions'] = array(
+      $operations['permissions'] = [
         'title' => t('Edit permissions'),
         'weight' => 20,
         'url' => $entity->urlInfo('edit-permissions-form'),
-      );
+      ];
     }
     return $operations;
   }
diff --git a/core/modules/user/src/SharedTempStore.php b/core/modules/user/src/SharedTempStore.php
index 40d39203f00848401e51873aaf06f14adc38fdce..2c6113ff66a7130fd751823056833c9444bfc1b0 100644
--- a/core/modules/user/src/SharedTempStore.php
+++ b/core/modules/user/src/SharedTempStore.php
@@ -142,11 +142,11 @@ public function getIfOwner($key) {
    *   TRUE if the data was set, or FALSE if it already existed.
    */
   public function setIfNotExists($key, $value) {
-    $value = (object) array(
+    $value = (object) [
       'owner' => $this->owner,
       'data' => $value,
       'updated' => (int) $this->requestStack->getMasterRequest()->server->get('REQUEST_TIME'),
-    );
+    ];
     return $this->storage->setWithExpireIfNotExists($key, $value, $this->expire);
   }
 
@@ -200,11 +200,11 @@ public function set($key, $value) {
       }
     }
 
-    $value = (object) array(
+    $value = (object) [
       'owner' => $this->owner,
       'data' => $value,
       'updated' => (int) $this->requestStack->getMasterRequest()->server->get('REQUEST_TIME'),
-    );
+    ];
     $this->storage->setWithExpire($key, $value, $this->expire);
     $this->lockBackend->release($key);
   }
diff --git a/core/modules/user/src/Tests/UserAccountLinksTest.php b/core/modules/user/src/Tests/UserAccountLinksTest.php
index 6d7d723fce11e23b68f17c2d8f2bd8f7701d00bd..7f456c4a055cb090ff148e2bba01565f838c1b18 100644
--- a/core/modules/user/src/Tests/UserAccountLinksTest.php
+++ b/core/modules/user/src/Tests/UserAccountLinksTest.php
@@ -16,7 +16,7 @@ class UserAccountLinksTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('menu_ui', 'block', 'test_page_test');
+  public static $modules = ['menu_ui', 'block', 'test_page_test'];
 
   /**
    * {@inheritdoc}
@@ -33,7 +33,7 @@ protected function setUp() {
    */
   function testSecondaryMenu() {
     // Create a regular user.
-    $user = $this->drupalCreateUser(array());
+    $user = $this->drupalCreateUser([]);
 
     // Log in and get the homepage.
     $this->drupalLogin($user);
@@ -41,18 +41,18 @@ function testSecondaryMenu() {
 
     // For a logged-in user, expect the secondary menu to have links for "My
     // account" and "Log out".
-    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', array(
+    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', [
       ':menu_class' => 'menu',
       ':href' => 'user',
       ':text' => 'My account',
-    ));
+    ]);
     $this->assertEqual(count($link), 1, 'My account link is in secondary menu.');
 
-    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', array(
+    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', [
       ':menu_class' => 'menu',
       ':href' => 'user/logout',
       ':text' => 'Log out',
-    ));
+    ]);
     $this->assertEqual(count($link), 1, 'Log out link is in secondary menu.');
 
     // Log out and get the homepage.
@@ -60,11 +60,11 @@ function testSecondaryMenu() {
     $this->drupalGet('<front>');
 
     // For a logged-out user, expect the secondary menu to have a "Log in" link.
-    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', array(
+    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', [
       ':menu_class' => 'menu',
       ':href' => 'user/login',
       ':text' => 'Log in',
-    ));
+    ]);
     $this->assertEqual(count($link), 1, 'Log in link is in secondary menu.');
   }
 
@@ -73,22 +73,22 @@ function testSecondaryMenu() {
    */
   function testDisabledAccountLink() {
     // Create an admin user and log in.
-    $this->drupalLogin($this->drupalCreateUser(array('access administration pages', 'administer menu')));
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer menu']));
 
     // Verify that the 'My account' link exists before we check for its
     // disappearance.
-    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', array(
+    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', [
       ':menu_class' => 'menu',
       ':href' => 'user',
       ':text' => 'My account',
-    ));
+    ]);
     $this->assertEqual(count($link), 1, 'My account link is in the secondary menu.');
 
     // Verify that the 'My account' link is enabled. Do not assume the value of
     // auto-increment is 1. Use XPath to obtain input element id and name using
     // the consistent label text.
     $this->drupalGet('admin/structure/menu/manage/account');
-    $label = $this->xpath('//label[contains(.,:text)]/@for', array(':text' => 'Enable My account menu link'));
+    $label = $this->xpath('//label[contains(.,:text)]/@for', [':text' => 'Enable My account menu link']);
     $this->assertFieldChecked((string) $label[0], "The 'My account' link is enabled by default.");
 
     // Disable the 'My account' link.
@@ -99,11 +99,11 @@ function testDisabledAccountLink() {
     $this->drupalGet('<front>');
 
     // Verify that the 'My account' link does not appear when disabled.
-    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', array(
+    $link = $this->xpath('//ul[@class=:menu_class]/li/a[contains(@href, :href) and text()=:text]', [
       ':menu_class' => 'menu',
       ':href' => 'user',
       ':text' => 'My account',
-    ));
+    ]);
     $this->assertEqual(count($link), 0, 'My account link is not in the secondary menu.');
   }
 
diff --git a/core/modules/user/src/Tests/UserAdminLanguageTest.php b/core/modules/user/src/Tests/UserAdminLanguageTest.php
index 03baa044e834d89422608aefed34a13397e67bc1..87bf835f617e0797a2e559b683c1e89e03cefaee 100644
--- a/core/modules/user/src/Tests/UserAdminLanguageTest.php
+++ b/core/modules/user/src/Tests/UserAdminLanguageTest.php
@@ -31,12 +31,12 @@ class UserAdminLanguageTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'language', 'language_test');
+  public static $modules = ['user', 'language', 'language_test'];
 
   protected function setUp() {
     parent::setUp();
     // User to add and remove language.
-    $this->adminUser = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $this->adminUser = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     // User to check non-admin access.
     $this->regularUser = $this->drupalCreateUser();
   }
@@ -117,7 +117,7 @@ function testActualNegotiation() {
     $this->assertText('Language negotiation method: language-url');
 
     // Set a preferred language code for the user.
-    $edit = array();
+    $edit = [];
     $edit['preferred_admin_langcode'] = 'xx';
     $this->drupalPostForm($path, $edit, t('Save'));
 
@@ -137,7 +137,7 @@ function testActualNegotiation() {
     $this->assertText('Language negotiation method: language-user-admin');
 
     // Unset the preferred language code for the user.
-    $edit = array();
+    $edit = [];
     $edit['preferred_admin_langcode'] = '';
     $this->drupalPostForm($path, $edit, t('Save'));
     $this->drupalGet($path);
@@ -156,12 +156,12 @@ function testActualNegotiation() {
    *   Whether the admin negotiation should be first.
    */
   function setLanguageNegotiation($admin_first = FALSE) {
-    $edit = array(
+    $edit = [
       'language_interface[enabled][language-user-admin]' => TRUE,
       'language_interface[enabled][language-url]' => TRUE,
       'language_interface[weight][language-user-admin]' => ($admin_first ? -12 : -8),
       'language_interface[weight][language-url]' => -10,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
   }
 
@@ -172,12 +172,12 @@ function addCustomLanguage() {
     $langcode = 'xx';
     // The English name for the language.
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
   }
 
diff --git a/core/modules/user/src/Tests/UserAdminListingTest.php b/core/modules/user/src/Tests/UserAdminListingTest.php
index 2ca50c8ffeba355294d72eddee81d78816e8647d..9ec95060bf46ab8e7033d657a69f938819a59faa 100644
--- a/core/modules/user/src/Tests/UserAdminListingTest.php
+++ b/core/modules/user/src/Tests/UserAdminListingTest.php
@@ -21,7 +21,7 @@ public function testUserListing() {
     $this->assertResponse(403, 'Anonymous user does not have access to the user admin listing.');
 
     // Create a bunch of users.
-    $accounts = array();
+    $accounts = [];
     for ($i = 0; $i < 3; $i++) {
       $account = $this->drupalCreateUser();
       $accounts[$account->label()] = $account;
@@ -39,8 +39,8 @@ public function testUserListing() {
     $accounts[$account->label()] = $account;
     $timestamp_user = $account->label();
 
-    $rid_1 = $this->drupalCreateRole(array(), 'custom_role_1', 'custom_role_1');
-    $rid_2 = $this->drupalCreateRole(array(), 'custom_role_2', 'custom_role_2');
+    $rid_1 = $this->drupalCreateRole([], 'custom_role_1', 'custom_role_1');
+    $rid_2 = $this->drupalCreateRole([], 'custom_role_2', 'custom_role_2');
 
     $account = $this->drupalCreateUser();
     $account->addRole($rid_1);
@@ -50,7 +50,7 @@ public function testUserListing() {
     $role_account_name = $account->label();
 
     // Create an admin user and look at the listing.
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $accounts[$admin_user->label()] = $admin_user;
 
     $accounts['admin'] = User::load(1);
@@ -61,22 +61,22 @@ public function testUserListing() {
     $this->assertResponse(200, 'The admin user has access to the user admin listing.');
 
     $result = $this->xpath('//table[contains(@class, "responsive-enabled")]/tbody/tr');
-    $result_accounts = array();
+    $result_accounts = [];
     foreach ($result as $account) {
       $name = (string) $account->td[0]->span;
-      $roles = array();
+      $roles = [];
       if (isset($account->td[2]->div->ul)) {
         foreach ($account->td[2]->div->ul->li as $element) {
           $roles[] = (string) $element;
         }
       }
-      $result_accounts[$name] = array(
+      $result_accounts[$name] = [
         'name' => $name,
         'status' => (string) $account->td[1],
         'roles' => $roles,
         'member_for' => (string) $account->td[3],
         'last_access' => (string) $account->td[4],
-      );
+      ];
     }
 
     $this->assertFalse(array_keys(array_diff_key($result_accounts, $accounts)), 'Ensure all accounts are listed.');
@@ -84,7 +84,7 @@ public function testUserListing() {
       $this->assertEqual($values['status'] == t('active'), $accounts[$name]->status->value, 'Ensure the status is displayed properly.');
     }
 
-    $expected_roles = array('custom_role_1', 'custom_role_2');
+    $expected_roles = ['custom_role_1', 'custom_role_2'];
     $this->assertEqual($result_accounts[$role_account_name]['roles'], $expected_roles, 'Ensure roles are listed properly.');
 
     $this->assertEqual($result_accounts[$timestamp_user]['member_for'], \Drupal::service('date.formatter')->formatTimeDiffSince($accounts[$timestamp_user]->created->value), 'Ensure the right member time is displayed.');
diff --git a/core/modules/user/src/Tests/UserAdminSettingsFormTest.php b/core/modules/user/src/Tests/UserAdminSettingsFormTest.php
index 2fba848bf240fe4d8bd62417e6c7875b18c9826b..b77411154c62bfae42ee40ea0a35e81f8fc204ee 100644
--- a/core/modules/user/src/Tests/UserAdminSettingsFormTest.php
+++ b/core/modules/user/src/Tests/UserAdminSettingsFormTest.php
@@ -16,33 +16,33 @@ protected function setUp() {
     parent::setUp();
 
     $this->form = AccountSettingsForm::create($this->container);
-    $this->values = array(
-      'anonymous' => array(
+    $this->values = [
+      'anonymous' => [
         '#value' => $this->randomString(10),
         '#config_name' => 'user.settings',
         '#config_key' => 'anonymous',
-      ),
-      'user_mail_cancel_confirm_body' => array(
+      ],
+      'user_mail_cancel_confirm_body' => [
         '#value' => $this->randomString(),
         '#config_name' => 'user.mail',
         '#config_key' => 'cancel_confirm.body',
-      ),
-      'user_mail_cancel_confirm_subject' => array(
+      ],
+      'user_mail_cancel_confirm_subject' => [
         '#value' => $this->randomString(20),
         '#config_name' => 'user.mail',
         '#config_key' => 'cancel_confirm.subject',
-      ),
-      'register_pending_approval_admin_body' => array(
+      ],
+      'register_pending_approval_admin_body' => [
         '#value' => $this->randomString(),
         '#config_name' => 'user.mail',
         '#config_key' => 'register_pending_approval_admin.body',
-      ),
-      'register_pending_approval_admin_subject' => array(
+      ],
+      'register_pending_approval_admin_subject' => [
         '#value' => $this->randomString(20),
         '#config_name' => 'user.mail',
         '#config_key' => 'register_pending_approval_admin.subject',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/user/src/Tests/UserAdminTest.php b/core/modules/user/src/Tests/UserAdminTest.php
index 8d4a22be78a15d07f0e620d13c9dedb525826ce5..6c83016cde7246c601a81560ed43742ba3b24caa 100644
--- a/core/modules/user/src/Tests/UserAdminTest.php
+++ b/core/modules/user/src/Tests/UserAdminTest.php
@@ -17,7 +17,7 @@ class UserAdminTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'views');
+  public static $modules = ['taxonomy', 'views'];
 
   /**
    * Registers a user and deletes it.
@@ -28,17 +28,17 @@ function testUserAdmin() {
     $user_a->name = 'User A';
     $user_a->mail = $this->randomMachineName() . '@example.com';
     $user_a->save();
-    $user_b = $this->drupalCreateUser(array('administer taxonomy'));
+    $user_b = $this->drupalCreateUser(['administer taxonomy']);
     $user_b->name = 'User B';
     $user_b->save();
-    $user_c = $this->drupalCreateUser(array('administer taxonomy'));
+    $user_c = $this->drupalCreateUser(['administer taxonomy']);
     $user_c->name = 'User C';
     $user_c->save();
 
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create admin user to delete registered user.
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     // Use a predictable name so that we can reliably order the user admin page
     // by name.
     $admin_user->name = 'Admin user';
@@ -51,11 +51,11 @@ function testUserAdmin() {
     $this->assertText($admin_user->getUsername(), 'Found Admin user on admin users page');
 
     // Test for existence of edit link in table.
-    $link = $user_a->link(t('Edit'), 'edit-form', array('query' => array('destination' => $user_a->url('collection'))));
+    $link = $user_a->link(t('Edit'), 'edit-form', ['query' => ['destination' => $user_a->url('collection')]]);
     $this->assertRaw($link, 'Found user A edit link on admin users page');
 
     // Test exposed filter elements.
-    foreach (array('user', 'role', 'permission', 'status') as $field) {
+    foreach (['user', 'role', 'permission', 'status'] as $field) {
       $this->assertField("edit-$field", "$field exposed filter found.");
     }
     // Make sure the reduce duplicates element from the ManyToOneHelper is not
@@ -63,18 +63,18 @@ function testUserAdmin() {
     $this->assertNoField('edit-reduce-duplicates', 'Reduce duplicates form element not found in exposed filters.');
 
     // Filter the users by name/email.
-    $this->drupalGet('admin/people', array('query' => array('user' => $user_a->getUsername())));
+    $this->drupalGet('admin/people', ['query' => ['user' => $user_a->getUsername()]]);
     $result = $this->xpath('//table/tbody/tr');
     $this->assertEqual(1, count($result), 'Filter by username returned the right amount.');
     $this->assertEqual($user_a->getUsername(), (string) $result[0]->td[1]->span, 'Filter by username returned the right user.');
 
-    $this->drupalGet('admin/people', array('query' => array('user' => $user_a->getEmail())));
+    $this->drupalGet('admin/people', ['query' => ['user' => $user_a->getEmail()]]);
     $result = $this->xpath('//table/tbody/tr');
     $this->assertEqual(1, count($result), 'Filter by username returned the right amount.');
     $this->assertEqual($user_a->getUsername(), (string) $result[0]->td[1]->span, 'Filter by username returned the right user.');
 
     // Filter the users by permission 'administer taxonomy'.
-    $this->drupalGet('admin/people', array('query' => array('permission' => 'administer taxonomy')));
+    $this->drupalGet('admin/people', ['query' => ['permission' => 'administer taxonomy']]);
 
     // Check if the correct users show up.
     $this->assertNoText($user_a->getUsername(), 'User A not on filtered by perm admin users page');
@@ -84,7 +84,7 @@ function testUserAdmin() {
     // Filter the users by role. Grab the system-generated role name for User C.
     $roles = $user_c->getRoles();
     unset($roles[array_search(RoleInterface::AUTHENTICATED_ID, $roles)]);
-    $this->drupalGet('admin/people', array('query' => array('role' => reset($roles))));
+    $this->drupalGet('admin/people', ['query' => ['role' => reset($roles)]]);
 
     // Check if the correct users show up when filtered by role.
     $this->assertNoText($user_a->getUsername(), 'User A not on filtered by role on admin users page');
@@ -94,53 +94,53 @@ function testUserAdmin() {
     // Test blocking of a user.
     $account = $user_storage->load($user_c->id());
     $this->assertTrue($account->isActive(), 'User C not blocked');
-    $edit = array();
+    $edit = [];
     $edit['action'] = 'user_block_user_action';
     $edit['user_bulk_form[4]'] = TRUE;
     $config
       ->set('notify.status_blocked', TRUE)
       ->save();
-    $this->drupalPostForm('admin/people', $edit, t('Apply to selected items'), array(
+    $this->drupalPostForm('admin/people', $edit, t('Apply to selected items'), [
       // Sort the table by username so that we know reliably which user will be
       // targeted with the blocking action.
-      'query' => array('order' => 'name', 'sort' => 'asc')
-    ));
+      'query' => ['order' => 'name', 'sort' => 'asc']
+    ]);
     $site_name = $this->config('system.site')->get('name');
     $this->assertMailString('body', 'Your account on ' . $site_name . ' has been blocked.', 1, 'Blocked message found in the mail sent to user C.');
-    $user_storage->resetCache(array($user_c->id()));
+    $user_storage->resetCache([$user_c->id()]);
     $account = $user_storage->load($user_c->id());
     $this->assertTrue($account->isBlocked(), 'User C blocked');
 
     // Test filtering on admin page for blocked users
-    $this->drupalGet('admin/people', array('query' => array('status' => 2)));
+    $this->drupalGet('admin/people', ['query' => ['status' => 2]]);
     $this->assertNoText($user_a->getUsername(), 'User A not on filtered by status on admin users page');
     $this->assertNoText($user_b->getUsername(), 'User B not on filtered by status on admin users page');
     $this->assertText($user_c->getUsername(), 'User C on filtered by status on admin users page');
 
     // Test unblocking of a user from /admin/people page and sending of activation mail
-    $editunblock = array();
+    $editunblock = [];
     $editunblock['action'] = 'user_unblock_user_action';
     $editunblock['user_bulk_form[4]'] = TRUE;
-    $this->drupalPostForm('admin/people', $editunblock, t('Apply to selected items'), array(
+    $this->drupalPostForm('admin/people', $editunblock, t('Apply to selected items'), [
       // Sort the table by username so that we know reliably which user will be
       // targeted with the blocking action.
-      'query' => array('order' => 'name', 'sort' => 'asc')
-    ));
-    $user_storage->resetCache(array($user_c->id()));
+      'query' => ['order' => 'name', 'sort' => 'asc']
+    ]);
+    $user_storage->resetCache([$user_c->id()]);
     $account = $user_storage->load($user_c->id());
     $this->assertTrue($account->isActive(), 'User C unblocked');
     $this->assertMail("to", $account->getEmail(), "Activation mail sent to user C");
 
     // Test blocking and unblocking another user from /user/[uid]/edit form and sending of activation mail
-    $user_d = $this->drupalCreateUser(array());
-    $user_storage->resetCache(array($user_d->id()));
+    $user_d = $this->drupalCreateUser([]);
+    $user_storage->resetCache([$user_d->id()]);
     $account1 = $user_storage->load($user_d->id());
-    $this->drupalPostForm('user/' . $account1->id() . '/edit', array('status' => 0), t('Save'));
-    $user_storage->resetCache(array($user_d->id()));
+    $this->drupalPostForm('user/' . $account1->id() . '/edit', ['status' => 0], t('Save'));
+    $user_storage->resetCache([$user_d->id()]);
     $account1 = $user_storage->load($user_d->id());
     $this->assertTrue($account1->isBlocked(), 'User D blocked');
-    $this->drupalPostForm('user/' . $account1->id() . '/edit', array('status' => TRUE), t('Save'));
-    $user_storage->resetCache(array($user_d->id()));
+    $this->drupalPostForm('user/' . $account1->id() . '/edit', ['status' => TRUE], t('Save'));
+    $user_storage->resetCache([$user_d->id()]);
     $account1 = $user_storage->load($user_d->id());
     $this->assertTrue($account1->isActive(), 'User D unblocked');
     $this->assertMail("to", $account1->getEmail(), "Activation mail sent to user D");
@@ -151,7 +151,7 @@ function testUserAdmin() {
    */
   function testNotificationEmailAddress() {
     // Test that the Notification Email address field is on the config page.
-    $admin_user = $this->drupalCreateUser(array('administer users', 'administer account settings'));
+    $admin_user = $this->drupalCreateUser(['administer users', 'administer account settings']);
     $this->drupalLogin($admin_user);
     $this->drupalGet('admin/config/people/accounts');
     $this->assertRaw('id="edit-mail-notification-address"', 'Notification Email address field exists');
@@ -173,27 +173,27 @@ function testNotificationEmailAddress() {
       ->set('mail_notification', $notify_address)
       ->save();
     // Register a new user account.
-    $edit = array();
+    $edit = [];
     $edit['name'] = $this->randomMachineName();
     $edit['mail'] = $edit['name'] . '@example.com';
     $this->drupalPostForm('user/register', $edit, t('Create new account'));
     $subject = 'Account details for ' . $edit['name'] . ' at ' . $system->get('name') . ' (pending admin approval)';
     // Ensure that admin notification mail is sent to the configured
     // Notification Email address.
-    $admin_mail = $this->drupalGetMails(array(
+    $admin_mail = $this->drupalGetMails([
       'to' => $notify_address,
       'from' => $server_address,
       'subject' => $subject,
-    ));
+    ]);
     $this->assertTrue(count($admin_mail), 'New user mail to admin is sent to configured Notification Email address');
     // Ensure that user notification mail is sent from the configured
     // Notification Email address.
-    $user_mail = $this->drupalGetMails(array(
+    $user_mail = $this->drupalGetMails([
       'to' => $edit['mail'],
       'from' => $server_address,
       'reply-to' => $notify_address,
       'subject' => $subject,
-    ));
+    ]);
     $this->assertTrue(count($user_mail), 'New user mail to user is sent from configured Notification Email address');
   }
 
diff --git a/core/modules/user/src/Tests/UserBlocksTest.php b/core/modules/user/src/Tests/UserBlocksTest.php
index 9216a2765d1f885f4a82d81a33ecfdab5ecdc6f4..beb263b23e600343bdf084c0ee56919dd24b350b 100644
--- a/core/modules/user/src/Tests/UserBlocksTest.php
+++ b/core/modules/user/src/Tests/UserBlocksTest.php
@@ -16,7 +16,7 @@ class UserBlocksTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'views');
+  public static $modules = ['block', 'views'];
 
   /**
    * A user with the 'administer blocks' permission.
@@ -28,7 +28,7 @@ class UserBlocksTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer blocks'));
+    $this->adminUser = $this->drupalCreateUser(['administer blocks']);
     $this->drupalLogin($this->adminUser);
     $this->drupalPlaceBlock('user_login_block');
     $this->drupalLogout($this->adminUser);
@@ -63,10 +63,10 @@ function testUserLoginBlockVisibility() {
    */
   function testUserLoginBlock() {
     // Create a user with some permission that anonymous users lack.
-    $user = $this->drupalCreateUser(array('administer permissions'));
+    $user = $this->drupalCreateUser(['administer permissions']);
 
     // Log in using the block.
-    $edit = array();
+    $edit = [];
     $edit['name'] = $user->getUsername();
     $edit['pass'] = $user->pass_raw;
     $this->drupalPostForm('admin/people/permissions', $edit, t('Log in'));
@@ -84,14 +84,14 @@ function testUserLoginBlock() {
     // Check that the user login block is not vulnerable to information
     // disclosure to third party sites.
     $this->drupalLogout();
-    $this->drupalPostForm('http://example.com/', $edit, t('Log in'), array('external' => FALSE));
+    $this->drupalPostForm('http://example.com/', $edit, t('Log in'), ['external' => FALSE]);
     // Check that we remain on the site after login.
     $this->assertUrl($user->url('canonical', ['absolute' => TRUE]), [], 'Redirected to user profile page after login from the frontpage');
 
     // Verify that form validation errors are displayed immediately for forms
     // in blocks and not on subsequent page requests.
     $this->drupalLogout();
-    $edit = array();
+    $edit = [];
     $edit['name'] = 'foo';
     $edit['pass'] = 'invalid password';
     $this->drupalPostForm('filter/tips', $edit, t('Log in'));
@@ -107,9 +107,9 @@ function testWhosOnlineBlock() {
     $block = $this->drupalPlaceBlock('views_block:who_s_online-who_s_online_block');
 
     // Generate users.
-    $user1 = $this->drupalCreateUser(array('access user profiles'));
-    $user2 = $this->drupalCreateUser(array());
-    $user3 = $this->drupalCreateUser(array());
+    $user1 = $this->drupalCreateUser(['access user profiles']);
+    $user2 = $this->drupalCreateUser([]);
+    $user3 = $this->drupalCreateUser([]);
 
     // Update access of two users to be within the active timespan.
     $this->updateAccess($user1->id());
@@ -138,7 +138,7 @@ function testWhosOnlineBlock() {
   private function updateAccess($uid, $access = REQUEST_TIME) {
     db_update('users_field_data')
       ->condition('uid', $uid)
-      ->fields(array('access' => $access))
+      ->fields(['access' => $access])
       ->execute();
   }
 
diff --git a/core/modules/user/src/Tests/UserCancelTest.php b/core/modules/user/src/Tests/UserCancelTest.php
index e8a9c79d744430f772ac7f1c4a587d9eee8931d1..6cfd5baf1a050f3af14834d184be22bcf9d18efb 100644
--- a/core/modules/user/src/Tests/UserCancelTest.php
+++ b/core/modules/user/src/Tests/UserCancelTest.php
@@ -22,12 +22,12 @@ class UserCancelTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'comment');
+  public static $modules = ['node', 'comment'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
   }
 
   /**
@@ -39,14 +39,14 @@ function testUserCancelWithoutPermission() {
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create a user.
-    $account = $this->drupalCreateUser(array());
+    $account = $this->drupalCreateUser([]);
     $this->drupalLogin($account);
     // Load a real user object.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
 
     // Create a node.
-    $node = $this->drupalCreateNode(array('uid' => $account->id()));
+    $node = $this->drupalCreateNode(['uid' => $account->id()]);
 
     // Attempt to cancel account.
     $this->drupalGet('user/' . $account->id() . '/edit');
@@ -56,12 +56,12 @@ function testUserCancelWithoutPermission() {
     $timestamp = $account->getLastLoginTime();
     $this->drupalGet("user/" . $account->id() . "/cancel/confirm/$timestamp/" . user_pass_rehash($account, $timestamp));
     $this->assertResponse(403, 'Bogus cancelling request rejected.');
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertTrue($account->isActive(), 'User account was not canceled.');
 
     // Confirm user's content has not been altered.
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $test_node = $node_storage->load($node->id());
     $this->assertTrue(($test_node->getOwnerId() == $account->id() && $test_node->isPublished()), 'Node of the user has not been altered.');
   }
@@ -70,21 +70,21 @@ function testUserCancelWithoutPermission() {
    * Test ability to change the permission for canceling users.
    */
   public function testUserCancelChangePermission() {
-    \Drupal::service('module_installer')->install(array('user_form_test'));
+    \Drupal::service('module_installer')->install(['user_form_test']);
     \Drupal::service('router.builder')->rebuild();
     $this->config('user.settings')->set('cancel_method', 'user_cancel_reassign')->save();
 
     // Create a regular user.
-    $account = $this->drupalCreateUser(array());
+    $account = $this->drupalCreateUser([]);
 
-    $admin_user = $this->drupalCreateUser(array('cancel other accounts'));
+    $admin_user = $this->drupalCreateUser(['cancel other accounts']);
     $this->drupalLogin($admin_user);
 
     // Delete regular user.
-    $this->drupalPostForm('user_form_test_cancel/' . $account->id(), array(), t('Cancel account'));
+    $this->drupalPostForm('user_form_test_cancel/' . $account->id(), [], t('Cancel account'));
 
     // Confirm deletion.
-    $this->assertRaw(t('%name has been deleted.', array('%name' => $account->getUsername())), 'User deleted.');
+    $this->assertRaw(t('%name has been deleted.', ['%name' => $account->getUsername()]), 'User deleted.');
     $this->assertFalse(User::load($account->id()), 'User is not found in the database.');
   }
 
@@ -97,14 +97,14 @@ public function testUserCancelChangePermission() {
   function testUserCancelUid1() {
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
-    \Drupal::service('module_installer')->install(array('views'));
+    \Drupal::service('module_installer')->install(['views']);
     \Drupal::service('router.builder')->rebuild();
     // Update uid 1's name and password to we know it.
     $password = user_password();
-    $account = array(
+    $account = [
       'name' => 'user1',
       'pass' => $this->container->get('password')->hash(trim($password)),
-    );
+    ];
     // We cannot use $account->save() here, because this would result in the
     // password being hashed again.
     db_update('users_field_data')
@@ -113,21 +113,21 @@ function testUserCancelUid1() {
       ->execute();
 
     // Reload and log in uid 1.
-    $user_storage->resetCache(array(1));
+    $user_storage->resetCache([1]);
     $user1 = $user_storage->load(1);
     $user1->pass_raw = $password;
 
     // Try to cancel uid 1's account with a different user.
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin_user);
-    $edit = array(
+    $edit = [
       'action' => 'user_cancel_user_action',
       'user_bulk_form[0]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/people', $edit, t('Apply to selected items'));
 
     // Verify that uid 1's account was not cancelled.
-    $user_storage->resetCache(array(1));
+    $user_storage->resetCache([1]);
     $user1 = $user_storage->load(1);
     $this->assertTrue($user1->isActive(), 'User #1 still exists and is not blocked.');
   }
@@ -141,14 +141,14 @@ function testUserCancelInvalid() {
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create a user.
-    $account = $this->drupalCreateUser(array('cancel account'));
+    $account = $this->drupalCreateUser(['cancel account']);
     $this->drupalLogin($account);
     // Load a real user object.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
 
     // Create a node.
-    $node = $this->drupalCreateNode(array('uid' => $account->id()));
+    $node = $this->drupalCreateNode(['uid' => $account->id()]);
 
     // Attempt to cancel account.
     $this->drupalPostForm('user/' . $account->id() . '/edit', NULL, t('Cancel account'));
@@ -162,7 +162,7 @@ function testUserCancelInvalid() {
     $bogus_timestamp = $timestamp + 60;
     $this->drupalGet("user/" . $account->id() . "/cancel/confirm/$bogus_timestamp/" . user_pass_rehash($account, $bogus_timestamp));
     $this->assertText(t('You have tried to use an account cancellation link that has expired. Please request a new one using the form below.'), 'Bogus cancelling request rejected.');
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertTrue($account->isActive(), 'User account was not canceled.');
 
@@ -170,12 +170,12 @@ function testUserCancelInvalid() {
     $bogus_timestamp = $timestamp - 86400 - 60;
     $this->drupalGet("user/" . $account->id() . "/cancel/confirm/$bogus_timestamp/" . user_pass_rehash($account, $bogus_timestamp));
     $this->assertText(t('You have tried to use an account cancellation link that has expired. Please request a new one using the form below.'), 'Expired cancel account request rejected.');
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertTrue($account->isActive(), 'User account was not canceled.');
 
     // Confirm user's content has not been altered.
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $test_node = $node_storage->load($node->id());
     $this->assertTrue(($test_node->getOwnerId() == $account->id() && $test_node->isPublished()), 'Node of the user has not been altered.');
   }
@@ -188,11 +188,11 @@ function testUserBlock() {
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create a user.
-    $web_user = $this->drupalCreateUser(array('cancel account'));
+    $web_user = $this->drupalCreateUser(['cancel account']);
     $this->drupalLogin($web_user);
 
     // Load a real user object.
-    $user_storage->resetCache(array($web_user->id()));
+    $user_storage->resetCache([$web_user->id()]);
     $account = $user_storage->load($web_user->id());
 
     // Attempt to cancel account.
@@ -210,12 +210,12 @@ function testUserBlock() {
 
     // Confirm account cancellation request.
     $this->drupalGet("user/" . $account->id() . "/cancel/confirm/$timestamp/" . user_pass_rehash($account, $timestamp));
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertTrue($account->isBlocked(), 'User has been blocked.');
 
     // Confirm that the confirmation message made it through to the end user.
-    $this->assertRaw(t('%name has been disabled.', array('%name' => $account->getUsername())), "Confirmation message displayed to user.");
+    $this->assertRaw(t('%name has been disabled.', ['%name' => $account->getUsername()]), "Confirmation message displayed to user.");
   }
 
   /**
@@ -229,14 +229,14 @@ function testUserBlockUnpublish() {
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create a user.
-    $account = $this->drupalCreateUser(array('cancel account'));
+    $account = $this->drupalCreateUser(['cancel account']);
     $this->drupalLogin($account);
     // Load a real user object.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
 
     // Create a node with two revisions.
-    $node = $this->drupalCreateNode(array('uid' => $account->id()));
+    $node = $this->drupalCreateNode(['uid' => $account->id()]);
     $settings = get_object_vars($node);
     $settings['revision'] = 1;
     $node = $this->drupalCreateNode($settings);
@@ -244,7 +244,7 @@ function testUserBlockUnpublish() {
     // Add a comment to the page.
     $comment_subject = $this->randomMachineName(8);
     $comment_body = $this->randomMachineName(8);
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'subject' => $comment_subject,
       'comment_body' => $comment_body,
       'entity_id' => $node->id(),
@@ -252,7 +252,7 @@ function testUserBlockUnpublish() {
       'field_name' => 'comment',
       'status' => CommentInterface::PUBLISHED,
       'uid' => $account->id(),
-    ));
+    ]);
     $comment->save();
 
     // Attempt to cancel account.
@@ -268,24 +268,24 @@ function testUserBlockUnpublish() {
 
     // Confirm account cancellation request.
     $this->drupalGet("user/" . $account->id() . "/cancel/confirm/$timestamp/" . user_pass_rehash($account, $timestamp));
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertTrue($account->isBlocked(), 'User has been blocked.');
 
     // Confirm user's content has been unpublished.
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $test_node = $node_storage->load($node->id());
     $this->assertFalse($test_node->isPublished(), 'Node of the user has been unpublished.');
     $test_node = node_revision_load($node->getRevisionId());
     $this->assertFalse($test_node->isPublished(), 'Node revision of the user has been unpublished.');
 
     $storage = \Drupal::entityManager()->getStorage('comment');
-    $storage->resetCache(array($comment->id()));
+    $storage->resetCache([$comment->id()]);
     $comment = $storage->load($comment->id());
     $this->assertFalse($comment->isPublished(), 'Comment of the user has been unpublished.');
 
     // Confirm that the confirmation message made it through to the end user.
-    $this->assertRaw(t('%name has been disabled.', array('%name' => $account->getUsername())), "Confirmation message displayed to user.");
+    $this->assertRaw(t('%name has been disabled.', ['%name' => $account->getUsername()]), "Confirmation message displayed to user.");
   }
 
   /**
@@ -299,19 +299,19 @@ function testUserAnonymize() {
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create a user.
-    $account = $this->drupalCreateUser(array('cancel account'));
+    $account = $this->drupalCreateUser(['cancel account']);
     $this->drupalLogin($account);
     // Load a real user object.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
 
     // Create a simple node.
-    $node = $this->drupalCreateNode(array('uid' => $account->id()));
+    $node = $this->drupalCreateNode(['uid' => $account->id()]);
 
     // Add a comment to the page.
     $comment_subject = $this->randomMachineName(8);
     $comment_body = $this->randomMachineName(8);
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'subject' => $comment_subject,
       'comment_body' => $comment_body,
       'entity_id' => $node->id(),
@@ -319,12 +319,12 @@ function testUserAnonymize() {
       'field_name' => 'comment',
       'status' => CommentInterface::PUBLISHED,
       'uid' => $account->id(),
-    ));
+    ]);
     $comment->save();
 
     // Create a node with two revisions, the initial one belonging to the
     // cancelling user.
-    $revision_node = $this->drupalCreateNode(array('uid' => $account->id()));
+    $revision_node = $this->drupalCreateNode(['uid' => $account->id()]);
     $revision = $revision_node->getRevisionId();
     $settings = get_object_vars($revision_node);
     $settings['revision'] = 1;
@@ -335,7 +335,7 @@ function testUserAnonymize() {
     $this->drupalGet('user/' . $account->id() . '/edit');
     $this->drupalPostForm(NULL, NULL, t('Cancel account'));
     $this->assertText(t('Are you sure you want to cancel your account?'), 'Confirmation form to cancel account displayed.');
-    $this->assertRaw(t('Your account will be removed and all account information deleted. All of your content will be assigned to the %anonymous-name user.', array('%anonymous-name' => $this->config('user.settings')->get('anonymous'))), 'Informs that all content will be attributed to anonymous account.');
+    $this->assertRaw(t('Your account will be removed and all account information deleted. All of your content will be assigned to the %anonymous-name user.', ['%anonymous-name' => $this->config('user.settings')->get('anonymous')]), 'Informs that all content will be attributed to anonymous account.');
 
     // Confirm account cancellation.
     $timestamp = time();
@@ -344,28 +344,28 @@ function testUserAnonymize() {
 
     // Confirm account cancellation request.
     $this->drupalGet("user/" . $account->id() . "/cancel/confirm/$timestamp/" . user_pass_rehash($account, $timestamp));
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $this->assertFalse($user_storage->load($account->id()), 'User is not found in the database.');
 
     // Confirm that user's content has been attributed to anonymous user.
     $anonymous_user = User::getAnonymousUser();
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $test_node = $node_storage->load($node->id());
     $this->assertTrue(($test_node->getOwnerId() == 0 && $test_node->isPublished()), 'Node of the user has been attributed to anonymous user.');
     $test_node = node_revision_load($revision, TRUE);
     $this->assertTrue(($test_node->getRevisionUser()->id() == 0 && $test_node->isPublished()), 'Node revision of the user has been attributed to anonymous user.');
-    $node_storage->resetCache(array($revision_node->id()));
+    $node_storage->resetCache([$revision_node->id()]);
     $test_node = $node_storage->load($revision_node->id());
     $this->assertTrue(($test_node->getOwnerId() != 0 && $test_node->isPublished()), "Current revision of the user's node was not attributed to anonymous user.");
 
     $storage = \Drupal::entityManager()->getStorage('comment');
-    $storage->resetCache(array($comment->id()));
+    $storage->resetCache([$comment->id()]);
     $test_comment = $storage->load($comment->id());
     $this->assertTrue(($test_comment->getOwnerId() == 0 && $test_comment->isPublished()), 'Comment of the user has been attributed to anonymous user.');
     $this->assertEqual($test_comment->getAuthorName(), $anonymous_user->getDisplayName(), 'Comment of the user has been attributed to anonymous user name.');
 
     // Confirm that the confirmation message made it through to the end user.
-    $this->assertRaw(t('%name has been deleted.', array('%name' => $account->getUsername())), "Confirmation message displayed to user.");
+    $this->assertRaw(t('%name has been deleted.', ['%name' => $account->getUsername()]), "Confirmation message displayed to user.");
   }
 
   /**
@@ -377,7 +377,7 @@ public function testUserAnonymizeBatch() {
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create a user.
-    $account = $this->drupalCreateUser(array('cancel account'));
+    $account = $this->drupalCreateUser(['cancel account']);
     $this->drupalLogin($account);
     // Load a real user object.
     $user_storage->resetCache([$account->id()]);
@@ -395,7 +395,7 @@ public function testUserAnonymizeBatch() {
     $this->drupalGet('user/' . $account->id() . '/edit');
     $this->drupalPostForm(NULL, NULL, t('Cancel account'));
     $this->assertText(t('Are you sure you want to cancel your account?'), 'Confirmation form to cancel account displayed.');
-    $this->assertRaw(t('Your account will be removed and all account information deleted. All of your content will be assigned to the %anonymous-name user.', array('%anonymous-name' => $this->config('user.settings')->get('anonymous'))), 'Informs that all content will be attributed to anonymous account.');
+    $this->assertRaw(t('Your account will be removed and all account information deleted. All of your content will be assigned to the %anonymous-name user.', ['%anonymous-name' => $this->config('user.settings')->get('anonymous')]), 'Informs that all content will be attributed to anonymous account.');
 
     // Confirm account cancellation.
     $timestamp = time();
@@ -421,36 +421,36 @@ public function testUserAnonymizeBatch() {
   function testUserDelete() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $this->config('user.settings')->set('cancel_method', 'user_cancel_delete')->save();
-    \Drupal::service('module_installer')->install(array('comment'));
+    \Drupal::service('module_installer')->install(['comment']);
     $this->resetAll();
     $this->addDefaultCommentField('node', 'page');
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create a user.
-    $account = $this->drupalCreateUser(array('cancel account', 'post comments', 'skip comment approval'));
+    $account = $this->drupalCreateUser(['cancel account', 'post comments', 'skip comment approval']);
     $this->drupalLogin($account);
     // Load a real user object.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
 
     // Create a simple node.
-    $node = $this->drupalCreateNode(array('uid' => $account->id()));
+    $node = $this->drupalCreateNode(['uid' => $account->id()]);
 
     // Create comment.
-    $edit = array();
+    $edit = [];
     $edit['subject[0][value]'] = $this->randomMachineName(8);
     $edit['comment_body[0][value]'] = $this->randomMachineName(16);
 
     $this->drupalPostForm('comment/reply/node/' . $node->id() . '/comment', $edit, t('Preview'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $this->assertText(t('Your comment has been posted.'));
-    $comments = entity_load_multiple_by_properties('comment', array('subject' => $edit['subject[0][value]']));
+    $comments = entity_load_multiple_by_properties('comment', ['subject' => $edit['subject[0][value]']]);
     $comment = reset($comments);
     $this->assertTrue($comment->id(), 'Comment found.');
 
     // Create a node with two revisions, the initial one belonging to the
     // cancelling user.
-    $revision_node = $this->drupalCreateNode(array('uid' => $account->id()));
+    $revision_node = $this->drupalCreateNode(['uid' => $account->id()]);
     $revision = $revision_node->getRevisionId();
     $settings = get_object_vars($revision_node);
     $settings['revision'] = 1;
@@ -470,20 +470,20 @@ function testUserDelete() {
 
     // Confirm account cancellation request.
     $this->drupalGet("user/" . $account->id() . "/cancel/confirm/$timestamp/" . user_pass_rehash($account, $timestamp));
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $this->assertFalse($user_storage->load($account->id()), 'User is not found in the database.');
 
     // Confirm that user's content has been deleted.
-    $node_storage->resetCache(array($node->id()));
+    $node_storage->resetCache([$node->id()]);
     $this->assertFalse($node_storage->load($node->id()), 'Node of the user has been deleted.');
     $this->assertFalse(node_revision_load($revision), 'Node revision of the user has been deleted.');
-    $node_storage->resetCache(array($revision_node->id()));
+    $node_storage->resetCache([$revision_node->id()]);
     $this->assertTrue($node_storage->load($revision_node->id()), "Current revision of the user's node was not deleted.");
-    \Drupal::entityManager()->getStorage('comment')->resetCache(array($comment->id()));
+    \Drupal::entityManager()->getStorage('comment')->resetCache([$comment->id()]);
     $this->assertFalse(Comment::load($comment->id()), 'Comment of the user has been deleted.');
 
     // Confirm that the confirmation message made it through to the end user.
-    $this->assertRaw(t('%name has been deleted.', array('%name' => $account->getUsername())), "Confirmation message displayed to user.");
+    $this->assertRaw(t('%name has been deleted.', ['%name' => $account->getUsername()]), "Confirmation message displayed to user.");
   }
 
   /**
@@ -493,21 +493,21 @@ function testUserCancelByAdmin() {
     $this->config('user.settings')->set('cancel_method', 'user_cancel_reassign')->save();
 
     // Create a regular user.
-    $account = $this->drupalCreateUser(array());
+    $account = $this->drupalCreateUser([]);
 
     // Create administrative user.
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin_user);
 
     // Delete regular user.
     $this->drupalGet('user/' . $account->id() . '/edit');
     $this->drupalPostForm(NULL, NULL, t('Cancel account'));
-    $this->assertRaw(t('Are you sure you want to cancel the account %name?', array('%name' => $account->getUsername())), 'Confirmation form to cancel account displayed.');
+    $this->assertRaw(t('Are you sure you want to cancel the account %name?', ['%name' => $account->getUsername()]), 'Confirmation form to cancel account displayed.');
     $this->assertText(t('Select the method to cancel the account above.'), 'Allows to select account cancellation method.');
 
     // Confirm deletion.
     $this->drupalPostForm(NULL, NULL, t('Cancel account'));
-    $this->assertRaw(t('%name has been deleted.', array('%name' => $account->getUsername())), 'User deleted.');
+    $this->assertRaw(t('%name has been deleted.', ['%name' => $account->getUsername()]), 'User deleted.');
     $this->assertFalse(User::load($account->id()), 'User is not found in the database.');
   }
 
@@ -518,24 +518,24 @@ function testUserWithoutEmailCancelByAdmin() {
     $this->config('user.settings')->set('cancel_method', 'user_cancel_reassign')->save();
 
     // Create a regular user.
-    $account = $this->drupalCreateUser(array());
+    $account = $this->drupalCreateUser([]);
     // This user has no email address.
     $account->mail = '';
     $account->save();
 
     // Create administrative user.
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin_user);
 
     // Delete regular user without email address.
     $this->drupalGet('user/' . $account->id() . '/edit');
     $this->drupalPostForm(NULL, NULL, t('Cancel account'));
-    $this->assertRaw(t('Are you sure you want to cancel the account %name?', array('%name' => $account->getUsername())), 'Confirmation form to cancel account displayed.');
+    $this->assertRaw(t('Are you sure you want to cancel the account %name?', ['%name' => $account->getUsername()]), 'Confirmation form to cancel account displayed.');
     $this->assertText(t('Select the method to cancel the account above.'), 'Allows to select account cancellation method.');
 
     // Confirm deletion.
     $this->drupalPostForm(NULL, NULL, t('Cancel account'));
-    $this->assertRaw(t('%name has been deleted.', array('%name' => $account->getUsername())), 'User deleted.');
+    $this->assertRaw(t('%name has been deleted.', ['%name' => $account->getUsername()]), 'User deleted.');
     $this->assertFalse(User::load($account->id()), 'User is not found in the database.');
   }
 
@@ -543,7 +543,7 @@ function testUserWithoutEmailCancelByAdmin() {
    * Create an administrative user and mass-delete other users.
    */
   function testMassUserCancelByAdmin() {
-    \Drupal::service('module_installer')->install(array('views'));
+    \Drupal::service('module_installer')->install(['views']);
     \Drupal::service('router.builder')->rebuild();
     $this->config('user.settings')->set('cancel_method', 'user_cancel_reassign')->save();
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
@@ -551,18 +551,18 @@ function testMassUserCancelByAdmin() {
     $this->config('user.settings')->set('notify.status_canceled', TRUE)->save();
 
     // Create administrative user.
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin_user);
 
     // Create some users.
-    $users = array();
+    $users = [];
     for ($i = 0; $i < 3; $i++) {
-      $account = $this->drupalCreateUser(array());
+      $account = $this->drupalCreateUser([]);
       $users[$account->id()] = $account;
     }
 
     // Cancel user accounts, including own one.
-    $edit = array();
+    $edit = [];
     $edit['action'] = 'user_cancel_user_action';
     for ($i = 0; $i <= 4; $i++) {
       $edit['user_bulk_form[' . $i . ']'] = TRUE;
@@ -578,7 +578,7 @@ function testMassUserCancelByAdmin() {
     $status = TRUE;
     foreach ($users as $account) {
       $status = $status && (strpos($this->content, $account->getUsername() . '</em> has been deleted.') !== FALSE);
-      $user_storage->resetCache(array($account->id()));
+      $user_storage->resetCache([$account->id()]);
       $status = $status && !$user_storage->load($account->id());
     }
     $this->assertTrue($status, 'Users deleted and not found in the database.');
@@ -589,7 +589,7 @@ function testMassUserCancelByAdmin() {
     $this->assertTrue($admin_user->isActive(), 'Administrative user is found in the database and enabled.');
 
     // Verify that uid 1's account was not cancelled.
-    $user_storage->resetCache(array(1));
+    $user_storage->resetCache([1]);
     $user1 = $user_storage->load(1);
     $this->assertTrue($user1->isActive(), 'User #1 still exists and is not blocked.');
   }
diff --git a/core/modules/user/src/Tests/UserCreateTest.php b/core/modules/user/src/Tests/UserCreateTest.php
index efc7ddf7aa31ac490a9f51e8e2c9e1de90643c1e..7b534435a0c2c068f44fb7308700f372f5f97ac4 100644
--- a/core/modules/user/src/Tests/UserCreateTest.php
+++ b/core/modules/user/src/Tests/UserCreateTest.php
@@ -18,14 +18,14 @@ class UserCreateTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('image');
+  public static $modules = ['image'];
 
   /**
    * Create a user through the administration interface and ensure that it
    * displays in the user list.
    */
   public function testUserAdd() {
-    $user = $this->drupalCreateUser(array('administer users'));
+    $user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($user);
 
     $this->assertEqual($user->getCreatedTime(), REQUEST_TIME, 'Creating a user sets default "created" timestamp.');
@@ -33,18 +33,18 @@ public function testUserAdd() {
 
     // Create a field.
     $field_name = 'test_field';
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'user',
       'module' => 'image',
       'type' => 'image',
       'cardinality' => 1,
       'locked' => FALSE,
-      'indexes' => array('target_id' => array('target_id')),
-      'settings' => array(
+      'indexes' => ['target_id' => ['target_id']],
+      'settings' => [
         'uri_scheme' => 'public',
-      ),
-    ))->save();
+      ],
+    ])->save();
 
     FieldConfig::create([
       'field_name' => $field_name,
@@ -53,7 +53,7 @@ public function testUserAdd() {
       'bundle' => 'user',
       'description' => t('Your virtual face or picture.'),
       'required' => FALSE,
-      'settings' => array(
+      'settings' => [
         'file_extensions' => 'png gif jpg jpeg',
         'file_directory' => 'pictures',
         'max_filesize' => '30 KB',
@@ -61,7 +61,7 @@ public function testUserAdd() {
         'title_field' => 0,
         'max_resolution' => '85x85',
         'min_resolution' => '',
-      ),
+      ],
     ])->save();
 
     // Test user creation page for valid fields.
@@ -86,23 +86,23 @@ public function testUserAdd() {
 
     // We create two users, notifying one and not notifying the other, to
     // ensure that the tests work in both cases.
-    foreach (array(FALSE, TRUE) as $notify) {
+    foreach ([FALSE, TRUE] as $notify) {
       $name = $this->randomMachineName();
-      $edit = array(
+      $edit = [
         'name' => $name,
         'mail' => $this->randomMachineName() . '@example.com',
         'pass[pass1]' => $pass = $this->randomString(),
         'pass[pass2]' => $pass,
         'notify' => $notify,
-      );
+      ];
       $this->drupalPostForm('admin/people/create', $edit, t('Create new account'));
 
       if ($notify) {
-        $this->assertText(t('A welcome message with further instructions has been emailed to the new user @name.', array('@name' => $edit['name'])), 'User created');
+        $this->assertText(t('A welcome message with further instructions has been emailed to the new user @name.', ['@name' => $edit['name']]), 'User created');
         $this->assertEqual(count($this->drupalGetMails()), 1, 'Notification email sent');
       }
       else {
-        $this->assertText(t('Created a new user account for @name. No email has been sent.', array('@name' => $edit['name'])), 'User created');
+        $this->assertText(t('Created a new user account for @name. No email has been sent.', ['@name' => $edit['name']]), 'User created');
         $this->assertEqual(count($this->drupalGetMails()), 0, 'Notification email not sent');
       }
 
@@ -115,13 +115,13 @@ public function testUserAdd() {
     // Test that the password '0' is considered a password.
     // @see https://www.drupal.org/node/2563751.
     $name = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'name' => $name,
       'mail' => $this->randomMachineName() . '@example.com',
       'pass[pass1]' => 0,
       'pass[pass2]' => 0,
       'notify' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/people/create', $edit, t('Create new account'));
     $this->assertText("Created a new user account for $name. No email has been sent");
     $this->assertNoText('Password field is required');
diff --git a/core/modules/user/src/Tests/UserEditTest.php b/core/modules/user/src/Tests/UserEditTest.php
index 5b34d2e028cacfe97150ffc0b45b7579bdc838a7..7c2fe4f311e33dc54122a3bb1e8b14bd2149139b 100644
--- a/core/modules/user/src/Tests/UserEditTest.php
+++ b/core/modules/user/src/Tests/UserEditTest.php
@@ -16,14 +16,14 @@ class UserEditTest extends WebTestBase {
    */
   function testUserEdit() {
     // Test user edit functionality.
-    $user1 = $this->drupalCreateUser(array('change own username'));
-    $user2 = $this->drupalCreateUser(array());
+    $user1 = $this->drupalCreateUser(['change own username']);
+    $user2 = $this->drupalCreateUser([]);
     $this->drupalLogin($user1);
 
     // Test that error message appears when attempting to use a non-unique user name.
     $edit['name'] = $user2->getUsername();
     $this->drupalPostForm("user/" . $user1->id() . "/edit", $edit, t('Save'));
-    $this->assertRaw(t('The username %name is already taken.', array('%name' => $edit['name'])));
+    $this->assertRaw(t('The username %name is already taken.', ['%name' => $edit['name']]));
 
     // Check that the default value in user name field
     // is the raw value and not a formatted one.
@@ -33,7 +33,7 @@ function testUserEdit() {
     $this->assertFieldByName('name', $user1->getAccountName());
 
     // Check that filling out a single password field does not validate.
-    $edit = array();
+    $edit = [];
     $edit['pass[pass1]'] = '';
     $edit['pass[pass2]'] = $this->randomMachineName();
     $this->drupalPostForm("user/" . $user1->id() . "/edit", $edit, t('Save'));
@@ -46,21 +46,21 @@ function testUserEdit() {
 
     // Test that the error message appears when attempting to change the mail or
     // pass without the current password.
-    $edit = array();
+    $edit = [];
     $edit['mail'] = $this->randomMachineName() . '@new.example.com';
     $this->drupalPostForm("user/" . $user1->id() . "/edit", $edit, t('Save'));
-    $this->assertRaw(t("Your current password is missing or incorrect; it's required to change the %name.", array('%name' => t('Email'))));
+    $this->assertRaw(t("Your current password is missing or incorrect; it's required to change the %name.", ['%name' => t('Email')]));
 
     $edit['current_pass'] = $user1->pass_raw;
     $this->drupalPostForm("user/" . $user1->id() . "/edit", $edit, t('Save'));
     $this->assertRaw(t("The changes have been saved."));
 
     // Test that the user must enter current password before changing passwords.
-    $edit = array();
+    $edit = [];
     $edit['pass[pass1]'] = $new_pass = $this->randomMachineName();
     $edit['pass[pass2]'] = $new_pass;
     $this->drupalPostForm("user/" . $user1->id() . "/edit", $edit, t('Save'));
-    $this->assertRaw(t("Your current password is missing or incorrect; it's required to change the %name.", array('%name' => t('Password'))));
+    $this->assertRaw(t("Your current password is missing or incorrect; it's required to change the %name.", ['%name' => t('Password')]));
 
     // Try again with the current password.
     $edit['current_pass'] = $user1->pass_raw;
@@ -90,20 +90,20 @@ function testUserEdit() {
 
     // Check that the user status field has the correct value and that it is
     // properly displayed.
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin_user);
 
     $this->drupalGet('user/' . $user1->id() . '/edit');
     $this->assertNoFieldChecked('edit-status-0');
     $this->assertFieldChecked('edit-status-1');
 
-    $edit = array('status' => 0);
+    $edit = ['status' => 0];
     $this->drupalPostForm('user/' . $user1->id() . '/edit', $edit, t('Save'));
     $this->assertText(t('The changes have been saved.'));
     $this->assertFieldChecked('edit-status-0');
     $this->assertNoFieldChecked('edit-status-1');
 
-    $edit = array('status' => 1);
+    $edit = ['status' => 1];
     $this->drupalPostForm('user/' . $user1->id() . '/edit', $edit, t('Save'));
     $this->assertText(t('The changes have been saved.'));
     $this->assertNoFieldChecked('edit-status-0');
@@ -133,14 +133,14 @@ public function testUserWith0Password() {
    */
   function testUserWithoutEmailEdit() {
     // Test that an admin can edit users without an email address.
-    $admin = $this->drupalCreateUser(array('administer users'));
+    $admin = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin);
     // Create a regular user.
-    $user1 = $this->drupalCreateUser(array());
+    $user1 = $this->drupalCreateUser([]);
     // This user has no email address.
     $user1->mail = '';
     $user1->save();
-    $this->drupalPostForm("user/" . $user1->id() . "/edit", array('mail' => ''), t('Save'));
+    $this->drupalPostForm("user/" . $user1->id() . "/edit", ['mail' => ''], t('Save'));
     $this->assertRaw(t("The changes have been saved."));
   }
 
diff --git a/core/modules/user/src/Tests/UserLanguageCreationTest.php b/core/modules/user/src/Tests/UserLanguageCreationTest.php
index 08ca7077a7e71dc54e7853772849488976c8cbd5..e38a9c03eda2705abb60f0baa90ea7e1250e87c6 100644
--- a/core/modules/user/src/Tests/UserLanguageCreationTest.php
+++ b/core/modules/user/src/Tests/UserLanguageCreationTest.php
@@ -18,14 +18,14 @@ class UserLanguageCreationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'language');
+  public static $modules = ['user', 'language'];
 
   /**
    * Functional test for language handling during user creation.
    */
   function testLocalUserCreation() {
     // User to add and remove language and create new users.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages', 'administer users'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages', 'administer users']);
     $this->drupalLogin($admin_user);
 
     // Add predefined language.
@@ -33,9 +33,9 @@ function testLocalUserCreation() {
     ConfigurableLanguage::createFromLangcode($langcode)->save();
 
     // Set language negotiation.
-    $edit = array(
+    $edit = [
       'language_interface[enabled][language-url]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/detection', $edit, t('Save settings'));
     $this->assertText(t('Language detection configuration saved.'), 'Set language negotiation.');
 
@@ -47,12 +47,12 @@ function testLocalUserCreation() {
     // Create a user with the admin/people/create form and check if the correct
     // language is set.
     $username = $this->randomMachineName(10);
-    $edit = array(
+    $edit = [
       'name' => $username,
       'mail' => $this->randomMachineName(4) . '@example.com',
       'pass[pass1]' => $username,
       'pass[pass2]' => $username,
-    );
+    ];
 
     $this->drupalPostForm($langcode . '/admin/people/create', $edit, t('Create new account'));
 
@@ -67,10 +67,10 @@ function testLocalUserCreation() {
     $this->assertNoFieldByName('language[fr]', 'Language selector is not accessible.');
 
     $username = $this->randomMachineName(10);
-    $edit = array(
+    $edit = [
       'name' => $username,
       'mail' => $this->randomMachineName(4) . '@example.com',
-    );
+    ];
 
     $this->drupalPostForm($langcode . '/user/register', $edit, t('Create new account'));
 
@@ -88,10 +88,10 @@ function testLocalUserCreation() {
 
     // Set pass_raw so we can log in the new user.
     $user->pass_raw = $this->randomMachineName(10);
-    $edit = array(
+    $edit = [
       'pass[pass1]' => $user->pass_raw,
       'pass[pass2]' => $user->pass_raw,
-    );
+    ];
 
     $this->drupalPostForm($user_edit, $edit, t('Save'));
 
diff --git a/core/modules/user/src/Tests/UserLoginTest.php b/core/modules/user/src/Tests/UserLoginTest.php
index af00c747376142ecad8e03ebcf766dee4b650629..406ccc04374ee717e9e633aa4847984e92dcc874 100644
--- a/core/modules/user/src/Tests/UserLoginTest.php
+++ b/core/modules/user/src/Tests/UserLoginTest.php
@@ -21,9 +21,9 @@ function testLoginCacheTagsAndDestination() {
     // depends on config:system.site, and its cache tags should be present.
     $this->assertCacheTag('config:system.site');
 
-    $user = $this->drupalCreateUser(array());
-    $this->drupalGet('user/login', array('query' => array('destination' => 'foo')));
-    $edit = array('name' => $user->getUserName(), 'pass' => $user->pass_raw);
+    $user = $this->drupalCreateUser([]);
+    $this->drupalGet('user/login', ['query' => ['destination' => 'foo']]);
+    $edit = ['name' => $user->getUserName(), 'pass' => $user->pass_raw];
     $this->drupalPostForm(NULL, $edit, t('Log in'));
     $this->assertUrl('foo', [], 'Redirected to the correct URL');
   }
@@ -38,7 +38,7 @@ function testGlobalLoginFloodControl() {
       ->set('user_limit', 4000)
       ->save();
 
-    $user1 = $this->drupalCreateUser(array());
+    $user1 = $this->drupalCreateUser([]);
     $incorrect_user1 = clone $user1;
     $incorrect_user1->pass_raw .= 'incorrect';
 
@@ -75,11 +75,11 @@ function testPerUserLoginFloodControl() {
       ->set('user_limit', 3)
       ->save();
 
-    $user1 = $this->drupalCreateUser(array());
+    $user1 = $this->drupalCreateUser([]);
     $incorrect_user1 = clone $user1;
     $incorrect_user1->pass_raw .= 'incorrect';
 
-    $user2 = $this->drupalCreateUser(array());
+    $user2 = $this->drupalCreateUser([]);
 
     // Try 2 failed logins.
     for ($i = 0; $i < 2; $i++) {
@@ -116,7 +116,7 @@ function testPasswordRehashOnLogin() {
     $password_hasher = $this->container->get('password');
 
     // Create a new user and authenticate.
-    $account = $this->drupalCreateUser(array());
+    $account = $this->drupalCreateUser([]);
     $password = $account->pass_raw;
     $this->drupalLogin($account);
     $this->drupalLogout();
@@ -129,13 +129,13 @@ function testPasswordRehashOnLogin() {
     // containing the necessary container builder code and then verify that the
     // users password gets rehashed during the login.
     $overridden_count_log2 = 19;
-    \Drupal::service('module_installer')->install(array('user_custom_phpass_params_test'));
+    \Drupal::service('module_installer')->install(['user_custom_phpass_params_test']);
     $this->resetAll();
 
     $account->pass_raw = $password;
     $this->drupalLogin($account);
     // Load the stored user, which should have a different password hash now.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertIdentical($password_hasher->getCountLog2($account->getPassword()), $overridden_count_log2);
     $this->assertTrue($password_hasher->check($password, $account->getPassword()));
@@ -155,19 +155,19 @@ function testPasswordRehashOnLogin() {
    *   - Set to NULL to expect a failed login.
    */
   function assertFailedLogin($account, $flood_trigger = NULL) {
-    $edit = array(
+    $edit = [
       'name' => $account->getUsername(),
       'pass' => $account->pass_raw,
-    );
+    ];
     $this->drupalPostForm('user/login', $edit, t('Log in'));
     $this->assertNoFieldByXPath("//input[@name='pass' and @value!='']", NULL, 'Password value attribute is blank.');
     if (isset($flood_trigger)) {
       if ($flood_trigger == 'user') {
-        $this->assertRaw(\Drupal::translation()->formatPlural($this->config('user.flood')->get('user_limit'), 'There has been more than one failed login attempt for this account. It is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', 'There have been more than @count failed login attempts for this account. It is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', array(':url' => \Drupal::url('user.pass'))));
+        $this->assertRaw(\Drupal::translation()->formatPlural($this->config('user.flood')->get('user_limit'), 'There has been more than one failed login attempt for this account. It is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', 'There have been more than @count failed login attempts for this account. It is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', [':url' => \Drupal::url('user.pass')]));
       }
       else {
         // No uid, so the limit is IP-based.
-        $this->assertRaw(t('Too many failed login attempts from your IP address. This IP address is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', array(':url' => \Drupal::url('user.pass'))));
+        $this->assertRaw(t('Too many failed login attempts from your IP address. This IP address is temporarily blocked. Try again later or <a href=":url">request a new password</a>.', [':url' => \Drupal::url('user.pass')]));
       }
     }
     else {
diff --git a/core/modules/user/src/Tests/UserPasswordResetTest.php b/core/modules/user/src/Tests/UserPasswordResetTest.php
index f3463bf1dc9d3e4a6018308502ba67195e2bb46d..fb19779d1c723aae26560f6c29739d6dc0dc05ed 100644
--- a/core/modules/user/src/Tests/UserPasswordResetTest.php
+++ b/core/modules/user/src/Tests/UserPasswordResetTest.php
@@ -61,7 +61,7 @@ protected function setUp() {
     // that it is definitely over a second ago.
     $account->login = REQUEST_TIME - mt_rand(10, 100000);
     db_update('users_field_data')
-      ->fields(array('login' => $account->getLastLoginTime()))
+      ->fields(['login' => $account->getLastLoginTime()])
       ->condition('uid', $account->id())
       ->execute();
   }
@@ -78,11 +78,11 @@ function testUserPasswordReset() {
     // Try to reset the password for an invalid account.
     $this->drupalGet('user/password');
 
-    $edit = array('name' => $this->randomMachineName(32));
+    $edit = ['name' => $this->randomMachineName(32)];
     $this->drupalPostForm(NULL, $edit, t('Submit'));
 
-    $this->assertText(t('@name is not recognized as a username or an email address.', array('@name' => $edit['name'])), 'Validation error message shown when trying to request password for invalid account.');
-    $this->assertEqual(count($this->drupalGetMails(array('id' => 'user_password_reset'))), 0, 'No email was sent when requesting a password for an invalid account.');
+    $this->assertText(t('@name is not recognized as a username or an email address.', ['@name' => $edit['name']]), 'Validation error message shown when trying to request password for invalid account.');
+    $this->assertEqual(count($this->drupalGetMails(['id' => 'user_password_reset'])), 0, 'No email was sent when requesting a password for an invalid account.');
 
     // Reset the password by username via the password reset page.
     $edit['name'] = $this->account->getUsername();
@@ -90,7 +90,7 @@ function testUserPasswordReset() {
 
     // Verify that the user was sent an email.
     $this->assertMail('to', $this->account->getEmail(), 'Password email sent to user.');
-    $subject = t('Replacement login information for @username at @site', array('@username' => $this->account->getUsername(), '@site' => $this->config('system.site')->get('name')));
+    $subject = t('Replacement login information for @username at @site', ['@username' => $this->account->getUsername(), '@site' => $this->config('system.site')->get('name')]);
     $this->assertMail('subject', $subject, 'Password reset email subject is correct.');
 
     $resetURL = $this->getResetURL();
@@ -112,19 +112,19 @@ function testUserPasswordReset() {
     // Check successful login.
     $this->drupalPostForm(NULL, NULL, t('Log in'));
     $this->assertLink(t('Log out'));
-    $this->assertTitle(t('@name | @site', array('@name' => $this->account->getUsername(), '@site' => $this->config('system.site')->get('name'))), 'Logged in using password reset link.');
+    $this->assertTitle(t('@name | @site', ['@name' => $this->account->getUsername(), '@site' => $this->config('system.site')->get('name')]), 'Logged in using password reset link.');
 
     // Make sure the ajax request from uploading a user picture does not
     // invalidate the reset token.
     $image = current($this->drupalGetTestFiles('image'));
-    $edit = array(
+    $edit = [
       'files[user_picture_0]' => drupal_realpath($image->uri),
-    );
+    ];
     $this->drupalPostAjaxForm(NULL, $edit, 'user_picture_0_upload_button');
 
     // Change the forgotten password.
     $password = user_password();
-    $edit = array('pass[pass1]' => $password, 'pass[pass2]' => $password);
+    $edit = ['pass[pass1]' => $password, 'pass[pass2]' => $password];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertText(t('The changes have been saved.'), 'Forgotten password changed.');
 
@@ -141,10 +141,10 @@ function testUserPasswordReset() {
     // Request a new password again, this time using the email address.
     $this->drupalGet('user/password');
     // Count email messages before to compare with after.
-    $before = count($this->drupalGetMails(array('id' => 'user_password_reset')));
-    $edit = array('name' => $this->account->getEmail());
+    $before = count($this->drupalGetMails(['id' => 'user_password_reset']));
+    $edit = ['name' => $this->account->getEmail()];
     $this->drupalPostForm(NULL, $edit, t('Submit'));
-    $this->assertTrue( count($this->drupalGetMails(array('id' => 'user_password_reset'))) === $before + 1, 'Email sent when requesting password reset using email address.');
+    $this->assertTrue( count($this->drupalGetMails(['id' => 'user_password_reset'])) === $before + 1, 'Email sent when requesting password reset using email address.');
 
     // Visit the user edit page without pass-reset-token and make sure it does
     // not cause an error.
@@ -173,15 +173,15 @@ function testUserPasswordReset() {
     // Verify a blocked user can not request a new password.
     $this->drupalGet('user/password');
     // Count email messages before to compare with after.
-    $before = count($this->drupalGetMails(array('id' => 'user_password_reset')));
-    $edit = array('name' => $blocked_account->getUsername());
+    $before = count($this->drupalGetMails(['id' => 'user_password_reset']));
+    $edit = ['name' => $blocked_account->getUsername()];
     $this->drupalPostForm(NULL, $edit, t('Submit'));
-    $this->assertRaw(t('%name is blocked or has not been activated yet.', array('%name' => $blocked_account->getUsername())), 'Notified user blocked accounts can not request a new password');
-    $this->assertTrue(count($this->drupalGetMails(array('id' => 'user_password_reset'))) === $before, 'No email was sent when requesting password reset for a blocked account');
+    $this->assertRaw(t('%name is blocked or has not been activated yet.', ['%name' => $blocked_account->getUsername()]), 'Notified user blocked accounts can not request a new password');
+    $this->assertTrue(count($this->drupalGetMails(['id' => 'user_password_reset'])) === $before, 'No email was sent when requesting password reset for a blocked account');
 
     // Verify a password reset link is invalidated when the user's email address changes.
     $this->drupalGet('user/password');
-    $edit = array('name' => $this->account->getUsername());
+    $edit = ['name' => $this->account->getUsername()];
     $this->drupalPostForm(NULL, $edit, t('Submit'));
     $old_email_reset_link = $this->getResetURL();
     $this->account->setEmail("1" . $this->account->getEmail());
@@ -193,12 +193,12 @@ function testUserPasswordReset() {
     // Verify a password reset link will automatically log a user when /login is
     // appended.
     $this->drupalGet('user/password');
-    $edit = array('name' => $this->account->getUsername());
+    $edit = ['name' => $this->account->getUsername()];
     $this->drupalPostForm(NULL, $edit, t('Submit'));
     $reset_url = $this->getResetURL();
     $this->drupalGet($reset_url . '/login');
     $this->assertLink(t('Log out'));
-    $this->assertTitle(t('@name | @site', array('@name' => $this->account->getUsername(), '@site' => $this->config('system.site')->get('name'))), 'Logged in using password reset link.');
+    $this->assertTitle(t('@name | @site', ['@name' => $this->account->getUsername(), '@site' => $this->config('system.site')->get('name')]), 'Logged in using password reset link.');
 
     // Ensure blocked and deleted accounts can't access the user.reset.login
     // route.
@@ -221,7 +221,7 @@ public function getResetURL() {
     // Assume the most recent email.
     $_emails = $this->drupalGetMails();
     $email = end($_emails);
-    $urls = array();
+    $urls = [];
     preg_match('#.+user/reset/.+#', $email['body'], $urls);
 
     return $urls[0];
@@ -264,7 +264,7 @@ public function testUserPasswordResetLoggedIn() {
 
     // Change the password.
     $password = user_password();
-    $edit = array('pass[pass1]' => $password, 'pass[pass2]' => $password);
+    $edit = ['pass[pass1]' => $password, 'pass[pass2]' => $password];
     $this->drupalPostForm(NULL, $edit, t('Save'));
     $this->assertText(t('The changes have been saved.'), 'Password changed.');
 
@@ -282,15 +282,15 @@ public function testUserPasswordResetLoggedIn() {
    */
   public function testUserResetPasswordTextboxFilled() {
     $this->drupalGet('user/login');
-    $edit = array(
+    $edit = [
       'name' => $this->randomMachineName(),
       'pass' => $this->randomMachineName(),
-    );
+    ];
     $this->drupalPostForm('user/login', $edit, t('Log in'));
     $this->assertRaw(t('Unrecognized username or password. <a href=":password">Forgot your password?</a>',
-      array(':password' => \Drupal::url('user.pass', [], array('query' => array('name' => $edit['name']))))));
+      [':password' => \Drupal::url('user.pass', [], ['query' => ['name' => $edit['name']]])]));
     unset($edit['pass']);
-    $this->drupalGet('user/password', array('query' => array('name' => $edit['name'])));
+    $this->drupalGet('user/password', ['query' => ['name' => $edit['name']]]);
     $this->assertFieldByName('name', $edit['name'], 'User name found.');
     // Ensure the name field value is not cached.
     $this->drupalGet('user/password');
@@ -303,7 +303,7 @@ public function testUserResetPasswordTextboxFilled() {
   function testResetImpersonation() {
     // Create two identical user accounts except for the user name. They must
     // have the same empty password, so we can't use $this->drupalCreateUser().
-    $edit = array();
+    $edit = [];
     $edit['name'] = $this->randomMachineName();
     $edit['mail'] = $edit['name'] . '@example.com';
     $edit['status'] = 1;
@@ -333,7 +333,7 @@ function testResetImpersonation() {
     $this->drupalGet($attack_reset_url);
     $this->drupalPostForm(NULL, NULL, t('Log in'));
     $this->assertNoText($user2->getUsername(), 'The invalid password reset page does not show the user name.');
-    $this->assertUrl('user/password', array(), 'The user is redirected to the password reset request page.');
+    $this->assertUrl('user/password', [], 'The user is redirected to the password reset request page.');
     $this->assertText('You have tried to use a one-time login link that has either been used or is no longer valid. Please request a new one using the form below.');
   }
 
diff --git a/core/modules/user/src/Tests/UserPermissionsTest.php b/core/modules/user/src/Tests/UserPermissionsTest.php
index 5e3ecd54929834de21a5f4ad10260656a5a443e8..50a7f9e32979506bd47159a53b41d8a67029c96c 100644
--- a/core/modules/user/src/Tests/UserPermissionsTest.php
+++ b/core/modules/user/src/Tests/UserPermissionsTest.php
@@ -31,7 +31,7 @@ class UserPermissionsTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer permissions', 'access user profiles', 'administer site configuration', 'administer modules', 'administer account settings'));
+    $this->adminUser = $this->drupalCreateUser(['administer permissions', 'access user profiles', 'administer site configuration', 'administer modules', 'administer account settings']);
 
     // Find the new role ID.
     $all_rids = $this->adminUser->getRoles();
@@ -59,7 +59,7 @@ function testUserPermissionChanges() {
 
     // Add a permission.
     $this->assertFalse($account->hasPermission('administer users'), 'User does not have "administer users" permission.');
-    $edit = array();
+    $edit = [];
     $edit[$rid . '[administer users]'] = TRUE;
     $this->drupalPostForm('admin/people/permissions', $edit, t('Save permissions'));
     $this->assertText(t('The changes have been saved.'), 'Successful save message displayed.');
@@ -72,7 +72,7 @@ function testUserPermissionChanges() {
 
     // Remove a permission.
     $this->assertTrue($account->hasPermission('access user profiles'), 'User has "access user profiles" permission.');
-    $edit = array();
+    $edit = [];
     $edit[$rid . '[access user profiles]'] = FALSE;
     $this->drupalPostForm('admin/people/permissions', $edit, t('Save permissions'));
     $this->assertText(t('The changes have been saved.'), 'Successful save message displayed.');
@@ -102,7 +102,7 @@ function testAdministratorRole() {
     $this->assertFalse(Role::load($this->rid)->isAdmin());
 
     // Set the user's role to be the administrator role.
-    $edit = array();
+    $edit = [];
     $edit['user_admin_role'] = $this->rid;
     $this->drupalPostForm('admin/config/people/accounts', $edit, t('Save configuration'));
 
@@ -111,12 +111,12 @@ function testAdministratorRole() {
 
     // Enable aggregator module and ensure the 'administer news feeds'
     // permission is assigned by default.
-    \Drupal::service('module_installer')->install(array('aggregator'));
+    \Drupal::service('module_installer')->install(['aggregator']);
 
     $this->assertTrue($this->adminUser->hasPermission('administer news feeds'), 'The permission was automatically assigned to the administrator role');
 
     // Ensure that selecting '- None -' removes the admin role.
-    $edit = array();
+    $edit = [];
     $edit['user_admin_role'] = '';
     $this->drupalPostForm('admin/config/people/accounts', $edit, t('Save configuration'));
 
@@ -148,10 +148,10 @@ function testUserRoleChangePermissions() {
     $this->assertTrue($account->hasPermission('administer site configuration'), 'User has "administer site configuration" permission.');
 
     // Change permissions.
-    $permissions = array(
+    $permissions = [
       'administer users' => 1,
       'access user profiles' => 0,
-    );
+    ];
     user_role_change_permissions($rid, $permissions);
 
     // Verify proper permission changes.
diff --git a/core/modules/user/src/Tests/UserPictureTest.php b/core/modules/user/src/Tests/UserPictureTest.php
index 3f8db42770da80b00c4ca25f77cc90223c64403f..e4c4d9abec157d085b70800b52087c2820d1fc19 100644
--- a/core/modules/user/src/Tests/UserPictureTest.php
+++ b/core/modules/user/src/Tests/UserPictureTest.php
@@ -33,12 +33,12 @@ class UserPictureTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array(
+    $this->webUser = $this->drupalCreateUser([
       'access content',
       'access comments',
       'post comments',
       'skip comment approval',
-    ));
+    ]);
   }
 
   /**
@@ -56,17 +56,17 @@ function testCreateDeletePicture() {
     $this->assertRaw(file_uri_target($file->getFileUri()), 'User picture found on user account page.');
 
     // Delete the picture.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('user/' . $this->webUser->id() . '/edit', $edit, t('Remove'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Call file_cron() to clean up the file. Make sure the timestamp
     // of the file is older than the system.file.temporary_maximum_age
     // configuration value.
     db_update('file_managed')
-      ->fields(array(
+      ->fields([
         'changed' => REQUEST_TIME - ($this->config('system.file')->get('temporary_maximum_age') + 1),
-      ))
+      ])
       ->condition('fid', $file->id())
       ->execute();
     \Drupal::service('cron')->run();
@@ -88,7 +88,7 @@ function testPictureOnNodeComment() {
     $image = current($this->drupalGetTestFiles('image'));
     $file = $this->saveUserPicture($image);
 
-    $node = $this->drupalCreateNode(array('type' => 'article'));
+    $node = $this->drupalCreateNode(['type' => 'article']);
 
     // Enable user pictures on nodes.
     $this->config('system.theme.global')->set('features.node_user_picture', TRUE)->save();
@@ -109,9 +109,9 @@ function testPictureOnNodeComment() {
       ->set('features.comment_user_picture', TRUE)
       ->save();
 
-    $edit = array(
+    $edit = [
       'comment_body[0][value]' => $this->randomString(),
-    );
+    ];
     $this->drupalPostForm('comment/reply/node/' . $node->id() . '/comment', $edit, t('Save'));
     $elements = $this->cssSelect('.comment__meta .field--name-user-picture img[alt="' . $alt_text . '"][src="' . $image_url . '"]');
     $this->assertEqual(count($elements), 1, 'User picture with alt text found on the comment.');
@@ -130,12 +130,12 @@ function testPictureOnNodeComment() {
    * Edits the user picture for the test user.
    */
   function saveUserPicture($image) {
-    $edit = array('files[user_picture_0]' => drupal_realpath($image->uri));
+    $edit = ['files[user_picture_0]' => drupal_realpath($image->uri)];
     $this->drupalPostForm('user/' . $this->webUser->id() . '/edit', $edit, t('Save'));
 
     // Load actual user data from database.
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
-    $user_storage->resetCache(array($this->webUser->id()));
+    $user_storage->resetCache([$this->webUser->id()]);
     $account = $user_storage->load($this->webUser->id());
     return File::load($account->user_picture->target_id);
   }
diff --git a/core/modules/user/src/Tests/UserRegistrationTest.php b/core/modules/user/src/Tests/UserRegistrationTest.php
index d537c6f82ab13a6a24ad21d456920a260f6fa8ae..6b6937c95cabc3641fff56b35575b2c15d255971 100644
--- a/core/modules/user/src/Tests/UserRegistrationTest.php
+++ b/core/modules/user/src/Tests/UserRegistrationTest.php
@@ -21,7 +21,7 @@ class UserRegistrationTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test');
+  public static $modules = ['field_test'];
 
   function testRegistrationWithEmailVerification() {
     $config = $this->config('user.settings');
@@ -35,7 +35,7 @@ function testRegistrationWithEmailVerification() {
 
     // Allow registration by site visitors without administrator approval.
     $config->set('register', USER_REGISTER_VISITORS)->save();
-    $edit = array();
+    $edit = [];
     $edit['name'] = $name = $this->randomMachineName();
     $edit['mail'] = $mail = $edit['name'] . '@example.com';
     $this->drupalPostForm('user/register', $edit, t('Create new account'));
@@ -52,7 +52,7 @@ function testRegistrationWithEmailVerification() {
 
     // Allow registration by site visitors, but require administrator approval.
     $config->set('register', USER_REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL)->save();
-    $edit = array();
+    $edit = [];
     $edit['name'] = $name = $this->randomMachineName();
     $edit['mail'] = $mail = $edit['name'] . '@example.com';
     $this->drupalPostForm('user/register', $edit, t('Create new account'));
@@ -71,7 +71,7 @@ function testRegistrationWithoutEmailVerification() {
       ->set('register', USER_REGISTER_VISITORS)
       ->save();
 
-    $edit = array();
+    $edit = [];
     $edit['name'] = $name = $this->randomMachineName();
     $edit['mail'] = $mail = $edit['name'] . '@example.com';
 
@@ -95,7 +95,7 @@ function testRegistrationWithoutEmailVerification() {
 
     // Allow registration by site visitors, but require administrator approval.
     $config->set('register', USER_REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL)->save();
-    $edit = array();
+    $edit = [];
     $edit['name'] = $name = $this->randomMachineName();
     $edit['mail'] = $mail = $edit['name'] . '@example.com';
     $edit['pass[pass1]'] = $pass = $this->randomMachineName();
@@ -104,22 +104,22 @@ function testRegistrationWithoutEmailVerification() {
     $this->assertText(t('Thank you for applying for an account. Your account is currently pending approval by the site administrator.'), 'Users are notified of pending approval');
 
     // Try to log in before administrator approval.
-    $auth = array(
+    $auth = [
       'name' => $name,
       'pass' => $pass,
-    );
+    ];
     $this->drupalPostForm('user/login', $auth, t('Log in'));
-    $this->assertText(t('The username @name has not been activated or is blocked.', array('@name' => $name)), 'User cannot log in yet.');
+    $this->assertText(t('The username @name has not been activated or is blocked.', ['@name' => $name]), 'User cannot log in yet.');
 
     // Activate the new account.
     $accounts = $this->container->get('entity_type.manager')->getStorage('user')
       ->loadByProperties(['name' => $name, 'mail' => $mail]);
     $new_user = reset($accounts);
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin_user);
-    $edit = array(
+    $edit = [
       'status' => 1,
-    );
+    ];
     $this->drupalPostForm('user/' . $new_user->id() . '/edit', $edit, t('Save'));
     $this->drupalLogout();
 
@@ -139,19 +139,19 @@ function testRegistrationEmailDuplicates() {
     // Set up a user to check for duplicates.
     $duplicate_user = $this->drupalCreateUser();
 
-    $edit = array();
+    $edit = [];
     $edit['name'] = $this->randomMachineName();
     $edit['mail'] = $duplicate_user->getEmail();
 
     // Attempt to create a new account using an existing email address.
     $this->drupalPostForm('user/register', $edit, t('Create new account'));
-    $this->assertText(t('The email address @email is already taken.', array('@email' => $duplicate_user->getEmail())), 'Supplying an exact duplicate email address displays an error message');
+    $this->assertText(t('The email address @email is already taken.', ['@email' => $duplicate_user->getEmail()]), 'Supplying an exact duplicate email address displays an error message');
 
     // Attempt to bypass duplicate email registration validation by adding spaces.
     $edit['mail'] = '   ' . $duplicate_user->getEmail() . '   ';
 
     $this->drupalPostForm('user/register', $edit, t('Create new account'));
-    $this->assertText(t('The email address @email is already taken.', array('@email' => $duplicate_user->getEmail())), 'Supplying a duplicate email address with added whitespace displays an error message');
+    $this->assertText(t('The email address @email is already taken.', ['@email' => $duplicate_user->getEmail()]), 'Supplying a duplicate email address with added whitespace displays an error message');
   }
 
   /**
@@ -241,7 +241,7 @@ function testRegistrationDefaultValues() {
     $this->drupalGet('user/register');
     $this->assertCacheTag('config:user.settings');
 
-    $edit = array();
+    $edit = [];
     $edit['name'] = $name = $this->randomMachineName();
     $edit['mail'] = $mail = $edit['name'] . '@example.com';
     $edit['pass[pass1]'] = $new_pass = $this->randomMachineName();
@@ -285,12 +285,12 @@ public function testUniqueFields() {
    */
   function testRegistrationWithUserFields() {
     // Create a field on 'user' entity type.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'test_user_field',
       'entity_type' => 'user',
       'type' => 'test_field',
       'cardinality' => 1,
-    ));
+    ]);
     $field_storage->save();
     $field = FieldConfig::create([
       'field_storage' => $field_storage,
@@ -300,7 +300,7 @@ function testRegistrationWithUserFields() {
     ]);
     $field->save();
     entity_get_form_display('user', 'user', 'default')
-      ->setComponent('test_user_field', array('type' => 'test_field_widget'))
+      ->setComponent('test_user_field', ['type' => 'test_field_widget'])
       ->save();
     entity_get_form_display('user', 'user', 'register')
       ->save();
@@ -313,7 +313,7 @@ function testRegistrationWithUserFields() {
 
     // Have the field appear on the registration form.
     entity_get_form_display('user', 'user', 'register')
-      ->setComponent('test_user_field', array('type' => 'test_field_widget'))
+      ->setComponent('test_user_field', ['type' => 'test_field_widget'])
       ->save();
 
     $this->drupalGet('user/register');
@@ -321,19 +321,19 @@ function testRegistrationWithUserFields() {
     $this->assertRegistrationFormCacheTagsWithUserFields();
 
     // Check that validation errors are correctly reported.
-    $edit = array();
+    $edit = [];
     $edit['name'] = $name = $this->randomMachineName();
     $edit['mail'] = $mail = $edit['name'] . '@example.com';
     // Missing input in required field.
     $edit['test_user_field[0][value]'] = '';
     $this->drupalPostForm(NULL, $edit, t('Create new account'));
     $this->assertRegistrationFormCacheTagsWithUserFields();
-    $this->assertRaw(t('@name field is required.', array('@name' => $field->label())), 'Field validation error was correctly reported.');
+    $this->assertRaw(t('@name field is required.', ['@name' => $field->label()]), 'Field validation error was correctly reported.');
     // Invalid input.
     $edit['test_user_field[0][value]'] = '-1';
     $this->drupalPostForm(NULL, $edit, t('Create new account'));
     $this->assertRegistrationFormCacheTagsWithUserFields();
-    $this->assertRaw(t('%name does not accept the value -1.', array('%name' => $field->label())), 'Field validation error was correctly reported.');
+    $this->assertRaw(t('%name does not accept the value -1.', ['%name' => $field->label()]), 'Field validation error was correctly reported.');
 
     // Submit with valid data.
     $value = rand(1, 255);
@@ -348,12 +348,12 @@ function testRegistrationWithUserFields() {
     // Check that the 'add more' button works.
     $field_storage->setCardinality(FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
     $field_storage->save();
-    foreach (array('js', 'nojs') as $js) {
+    foreach (['js', 'nojs'] as $js) {
       $this->drupalGet('user/register');
       $this->assertRegistrationFormCacheTagsWithUserFields();
       // Add two inputs.
       $value = rand(1, 255);
-      $edit = array();
+      $edit = [];
       $edit['test_user_field[0][value]'] = $value;
       if ($js == 'js') {
         $this->drupalPostAjaxForm(NULL, $edit, 'test_user_field_add_more');
@@ -371,11 +371,11 @@ function testRegistrationWithUserFields() {
       $this->drupalPostForm(NULL, $edit, t('Create new account'));
       // Check user fields.
       $accounts = $this->container->get('entity_type.manager')->getStorage('user')
-        ->loadByProperties(array('name' => $name, 'mail' => $mail));
+        ->loadByProperties(['name' => $name, 'mail' => $mail]);
       $new_user = reset($accounts);
-      $this->assertEqual($new_user->test_user_field[0]->value, $value, format_string('@js : The field value was correctly saved.', array('@js' => $js)));
-      $this->assertEqual($new_user->test_user_field[1]->value, $value + 1, format_string('@js : The field value was correctly saved.', array('@js' => $js)));
-      $this->assertEqual($new_user->test_user_field[2]->value, $value + 2, format_string('@js : The field value was correctly saved.', array('@js' => $js)));
+      $this->assertEqual($new_user->test_user_field[0]->value, $value, format_string('@js : The field value was correctly saved.', ['@js' => $js]));
+      $this->assertEqual($new_user->test_user_field[1]->value, $value + 1, format_string('@js : The field value was correctly saved.', ['@js' => $js]));
+      $this->assertEqual($new_user->test_user_field[2]->value, $value + 2, format_string('@js : The field value was correctly saved.', ['@js' => $js]));
     }
   }
 
diff --git a/core/modules/user/src/Tests/UserRoleAdminTest.php b/core/modules/user/src/Tests/UserRoleAdminTest.php
index 182da93cb00e45f0e3a5d1753b58d7dc72fd5ddf..5b0be69c830d014c02423d08822ced555586f86b 100644
--- a/core/modules/user/src/Tests/UserRoleAdminTest.php
+++ b/core/modules/user/src/Tests/UserRoleAdminTest.php
@@ -32,7 +32,7 @@ class UserRoleAdminTest extends WebTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array('administer permissions', 'administer users'));
+    $this->adminUser = $this->drupalCreateUser(['administer permissions', 'administer users']);
     $this->drupalPlaceBlock('local_tasks_block');
   }
 
@@ -44,19 +44,19 @@ function testRoleAdministration() {
     $default_langcode = \Drupal::languageManager()->getDefaultLanguage()->getId();
     // Test presence of tab.
     $this->drupalGet('admin/people/permissions');
-    $tabs = $this->xpath('//ul[@class=:classes and //a[contains(., :text)]]', array(
+    $tabs = $this->xpath('//ul[@class=:classes and //a[contains(., :text)]]', [
       ':classes' => 'tabs primary',
       ':text' => t('Roles'),
-    ));
+    ]);
     $this->assertEqual(count($tabs), 1, 'Found roles tab');
 
     // Test adding a role. (In doing so, we use a role name that happens to
     // correspond to an integer, to test that the role administration pages
     // correctly distinguish between role names and IDs.)
     $role_name = '123';
-    $edit = array('label' => $role_name, 'id' => $role_name);
+    $edit = ['label' => $role_name, 'id' => $role_name];
     $this->drupalPostForm('admin/people/roles/add', $edit, t('Save'));
-    $this->assertRaw(t('Role %label has been added.', array('%label' => 123)));
+    $this->assertRaw(t('Role %label has been added.', ['%label' => 123]));
     $role = Role::load($role_name);
     $this->assertTrue(is_object($role), 'The role was successfully retrieved from the database.');
 
@@ -69,20 +69,20 @@ function testRoleAdministration() {
 
     // Test renaming a role.
     $role_name = '456';
-    $edit = array('label' => $role_name);
+    $edit = ['label' => $role_name];
     $this->drupalPostForm("admin/people/roles/manage/{$role->id()}", $edit, t('Save'));
-    $this->assertRaw(t('Role %label has been updated.', array('%label' => $role_name)));
-    \Drupal::entityManager()->getStorage('user_role')->resetCache(array($role->id()));
+    $this->assertRaw(t('Role %label has been updated.', ['%label' => $role_name]));
+    \Drupal::entityManager()->getStorage('user_role')->resetCache([$role->id()]);
     $new_role = Role::load($role->id());
     $this->assertEqual($new_role->label(), $role_name, 'The role name has been successfully changed.');
 
     // Test deleting a role.
     $this->drupalGet("admin/people/roles/manage/{$role->id()}");
     $this->clickLink(t('Delete'));
-    $this->drupalPostForm(NULL, array(), t('Delete'));
-    $this->assertRaw(t('The role %label has been deleted.', array('%label' => $role_name)));
+    $this->drupalPostForm(NULL, [], t('Delete'));
+    $this->assertRaw(t('The role %label has been deleted.', ['%label' => $role_name]));
     $this->assertNoLinkByHref("admin/people/roles/manage/{$role->id()}", 'Role edit link removed.');
-    \Drupal::entityManager()->getStorage('user_role')->resetCache(array($role->id()));
+    \Drupal::entityManager()->getStorage('user_role')->resetCache([$role->id()]);
     $this->assertFalse(Role::load($role->id()), 'A deleted role can no longer be loaded.');
 
     // Make sure that the system-defined roles can be edited via the user
@@ -102,11 +102,11 @@ function testRoleWeightOrdering() {
     $this->drupalLogin($this->adminUser);
     $roles = user_roles();
     $weight = count($roles);
-    $new_role_weights = array();
-    $saved_rids = array();
+    $new_role_weights = [];
+    $saved_rids = [];
 
     // Change the role weights to make the roles in reverse order.
-    $edit = array();
+    $edit = [];
     foreach ($roles as $role) {
       $edit['entities[' . $role->id() . '][weight]'] = $weight;
       $new_role_weights[$role->id()] = $weight;
@@ -119,7 +119,7 @@ function testRoleWeightOrdering() {
     // Load up the user roles with the new weights.
     drupal_static_reset('user_roles');
     $roles = user_roles();
-    $rids = array();
+    $rids = [];
     // Test that the role weights have been correctly saved.
     foreach ($roles as $role) {
       $this->assertEqual($role->getWeight(), $new_role_weights[$role->id()]);
diff --git a/core/modules/user/src/Tests/UserTimeZoneTest.php b/core/modules/user/src/Tests/UserTimeZoneTest.php
index 3229d319bb55e77e791042d7e4366642ec9efc74..9b027b557156640a2a4d9dde9f350ef5fb1a0292 100644
--- a/core/modules/user/src/Tests/UserTimeZoneTest.php
+++ b/core/modules/user/src/Tests/UserTimeZoneTest.php
@@ -17,7 +17,7 @@ class UserTimeZoneTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'system_test');
+  public static $modules = ['node', 'system_test'];
 
   /**
    * Tests the display of dates and time when user-configurable time zones are set.
@@ -42,10 +42,10 @@ function testUserTimeZone() {
     $date2 = '2007-03-11 01:00:00 -0800';
     // One date in PDT (summer time):
     $date3 = '2007-03-20 21:00:00 -0700';
-    $this->drupalCreateContentType(array('type' => 'article'));
-    $node1 = $this->drupalCreateNode(array('created' => strtotime($date1), 'type' => 'article'));
-    $node2 = $this->drupalCreateNode(array('created' => strtotime($date2), 'type' => 'article'));
-    $node3 = $this->drupalCreateNode(array('created' => strtotime($date3), 'type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
+    $node1 = $this->drupalCreateNode(['created' => strtotime($date1), 'type' => 'article']);
+    $node2 = $this->drupalCreateNode(['created' => strtotime($date2), 'type' => 'article']);
+    $node3 = $this->drupalCreateNode(['created' => strtotime($date3), 'type' => 'article']);
 
     // Confirm date format and time zone.
     $this->drupalGet('node/' . $node1->id());
@@ -56,7 +56,7 @@ function testUserTimeZone() {
     $this->assertText('2007-03-20 21:00 PDT', 'Date should be PDT.');
 
     // Change user time zone to Santiago time.
-    $edit = array();
+    $edit = [];
     $edit['mail'] = $web_user->getEmail();
     $edit['timezone'] = 'America/Santiago';
     $this->drupalPostForm("user/" . $web_user->id() . "/edit", $edit, t('Save'));
diff --git a/core/modules/user/src/Tests/UserTranslationUITest.php b/core/modules/user/src/Tests/UserTranslationUITest.php
index 82a3445145269a6661ff09fe9d13a86b0a006ccd..32a9b8febbd1ab56527c4040d93492252f09aad4 100644
--- a/core/modules/user/src/Tests/UserTranslationUITest.php
+++ b/core/modules/user/src/Tests/UserTranslationUITest.php
@@ -23,7 +23,7 @@ class UserTranslationUITest extends ContentTranslationUITestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'content_translation', 'user', 'views');
+  public static $modules = ['language', 'content_translation', 'user', 'views'];
 
   protected function setUp() {
     $this->entityTypeId = 'user';
@@ -38,7 +38,7 @@ protected function setUp() {
    * {@inheritdoc}
    */
   protected function getTranslatorPermissions() {
-    return array_merge(parent::getTranslatorPermissions(), array('administer users'));
+    return array_merge(parent::getTranslatorPermissions(), ['administer users']);
   }
 
   /**
@@ -46,7 +46,7 @@ protected function getTranslatorPermissions() {
    */
   protected function getNewEntityValues($langcode) {
     // User name is not translatable hence we use a fixed value.
-    return array('name' => $this->name) + parent::getNewEntityValues($langcode);
+    return ['name' => $this->name] + parent::getNewEntityValues($langcode);
   }
 
   /**
@@ -62,14 +62,14 @@ protected function doTestTranslationEdit() {
     foreach ($this->langcodes as $langcode) {
       // We only want to test the title for non-english translations.
       if ($langcode != 'en') {
-        $options = array('language' => $languages[$langcode]);
+        $options = ['language' => $languages[$langcode]];
         $url = $entity->urlInfo('edit-form', $options);
         $this->drupalGet($url);
 
-        $title = t('@title [%language translation]', array(
+        $title = t('@title [%language translation]', [
           '@title' => $entity->getTranslation($langcode)->label(),
           '%language' => $languages[$langcode]->getName(),
-        ));
+        ]);
         $this->assertRaw($title);
       }
     }
diff --git a/core/modules/user/src/Tests/Views/AccessPermissionTest.php b/core/modules/user/src/Tests/Views/AccessPermissionTest.php
index b8ef5a9f8e859ac7ea14a8c7883fb5f76a02d0bf..f82b103d2830c2cf323b6d2e938095af482f450c 100644
--- a/core/modules/user/src/Tests/Views/AccessPermissionTest.php
+++ b/core/modules/user/src/Tests/Views/AccessPermissionTest.php
@@ -19,7 +19,7 @@ class AccessPermissionTest extends AccessTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_access_perm');
+  public static $testViews = ['test_access_perm'];
 
   /**
    * Tests perm access plugin.
diff --git a/core/modules/user/src/Tests/Views/AccessRoleTest.php b/core/modules/user/src/Tests/Views/AccessRoleTest.php
index 24629158b8f5205322b87e2f6c14176bd8bbfe05..04f2876dc002f60fa8885213fb8dcd98c0dd0033 100644
--- a/core/modules/user/src/Tests/Views/AccessRoleTest.php
+++ b/core/modules/user/src/Tests/Views/AccessRoleTest.php
@@ -20,7 +20,7 @@ class AccessRoleTest extends AccessTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_access_role');
+  public static $testViews = ['test_access_role'];
 
   /**
    * Tests role access plugin.
@@ -29,9 +29,9 @@ function testAccessRole() {
     /** @var \Drupal\views\ViewEntityInterface $view */
     $view = \Drupal::entityManager()->getStorage('view')->load('test_access_role');
     $display = &$view->getDisplay('default');
-    $display['display_options']['access']['options']['role'] = array(
+    $display['display_options']['access']['options']['role'] = [
       $this->normalRole => $this->normalRole,
-    );
+    ];
     $view->save();
     $this->container->get('router.builder')->rebuildIfNeeded();
     $expected = [
@@ -63,10 +63,10 @@ function testAccessRole() {
     // Test allowing multiple roles.
     $view = Views::getView('test_access_role')->storage;
     $display = &$view->getDisplay('default');
-    $display['display_options']['access']['options']['role'] = array(
+    $display['display_options']['access']['options']['role'] = [
       $this->normalRole => $this->normalRole,
       'anonymous' => 'anonymous',
-    );
+    ];
     $view->save();
     $this->container->get('router.builder')->rebuildIfNeeded();
 
@@ -102,9 +102,9 @@ public function testRenderCaching() {
     $display['display_options']['cache'] = [
       'type' => 'tag',
     ];
-    $display['display_options']['access']['options']['role'] = array(
+    $display['display_options']['access']['options']['role'] = [
       $this->normalRole => $this->normalRole,
-    );
+    ];
     $view->save();
 
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
diff --git a/core/modules/user/src/Tests/Views/AccessRoleUITest.php b/core/modules/user/src/Tests/Views/AccessRoleUITest.php
index 7fb94960099a33a0fb1483a9b16d57d94f998c52..bea8c53c603ffa626894171f1843e41416a92393 100644
--- a/core/modules/user/src/Tests/Views/AccessRoleUITest.php
+++ b/core/modules/user/src/Tests/Views/AccessRoleUITest.php
@@ -18,14 +18,14 @@ class AccessRoleUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_access_role');
+  public static $testViews = ['test_access_role'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('user', 'user_test_views');
+  public static $modules = ['user', 'user_test_views'];
 
   /**
    * {@inheritdoc}
@@ -33,7 +33,7 @@ class AccessRoleUITest extends UITestBase {
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('user_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['user_test_views']);
   }
 
   /**
@@ -41,20 +41,20 @@ protected function setUp() {
    */
   public function testAccessRoleUI() {
     $entity_manager = $this->container->get('entity.manager');
-    $entity_manager->getStorage('user_role')->create(array('id' => 'custom_role', 'label' => 'Custom role'))->save();
+    $entity_manager->getStorage('user_role')->create(['id' => 'custom_role', 'label' => 'Custom role'])->save();
     $access_url = "admin/structure/views/nojs/display/test_access_role/default/access_options";
-    $this->drupalPostForm($access_url, array('access_options[role][custom_role]' => 1), t('Apply'));
+    $this->drupalPostForm($access_url, ['access_options[role][custom_role]' => 1], t('Apply'));
     $this->assertResponse(200);
 
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $view = $entity_manager->getStorage('view')->load('test_access_role');
 
     $display = $view->getDisplay('default');
-    $this->assertEqual($display['display_options']['access']['options']['role'], array('custom_role' => 'custom_role'));
+    $this->assertEqual($display['display_options']['access']['options']['role'], ['custom_role' => 'custom_role']);
 
     // Test changing access plugin from role to none.
     $this->drupalPostForm('admin/structure/views/nojs/display/test_access_role/default/access', ['access[type]' => 'none'], t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     // Verify that role option is not set.
     $view = $entity_manager->getStorage('view')->load('test_access_role');
     $display = $view->getDisplay('default');
diff --git a/core/modules/user/src/Tests/Views/AccessTestBase.php b/core/modules/user/src/Tests/Views/AccessTestBase.php
index 90a3d2f52e57fa94c90b74f586e970be8a7cb476..b0395b0f09ae4add045a2d55ffd2b4cb94404e7b 100644
--- a/core/modules/user/src/Tests/Views/AccessTestBase.php
+++ b/core/modules/user/src/Tests/Views/AccessTestBase.php
@@ -12,7 +12,7 @@ abstract class AccessTestBase extends UserTestBase {
    *
    * @var array
    */
-  public static $modules = array('block');
+  public static $modules = ['block'];
 
   /**
    * Contains a user object that has no special permissions.
@@ -55,8 +55,8 @@ protected function setUp() {
     $roles = $this->webUser->getRoles();
     $this->webRole = $roles[0];
 
-    $this->normalRole = $this->drupalCreateRole(array());
-    $this->normalUser = $this->drupalCreateUser(array('views_test_data test permission'));
+    $this->normalRole = $this->drupalCreateRole([]);
+    $this->normalUser = $this->drupalCreateUser(['views_test_data test permission']);
     $this->normalUser->addRole($this->normalRole);
     $this->normalUser->save();
     // @todo when all the plugin information is cached make a reset function and
diff --git a/core/modules/user/src/Tests/Views/ArgumentDefaultTest.php b/core/modules/user/src/Tests/Views/ArgumentDefaultTest.php
index 4e21d79cfb1f79e0c455cacc5e32b2989e997cf4..7db32373a847505ae1e77215ceb1bb287a806e4c 100644
--- a/core/modules/user/src/Tests/Views/ArgumentDefaultTest.php
+++ b/core/modules/user/src/Tests/Views/ArgumentDefaultTest.php
@@ -16,7 +16,7 @@ class ArgumentDefaultTest extends UserTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_plugin_argument_default_current_user');
+  public static $testViews = ['test_plugin_argument_default_current_user'];
 
   public function test_plugin_argument_default_current_user() {
     // Create a user to test.
diff --git a/core/modules/user/src/Tests/Views/ArgumentValidateTest.php b/core/modules/user/src/Tests/Views/ArgumentValidateTest.php
index 0a49142547d21f280034160b57205dcb5fc1366d..1f60df20d90c9f43eeb2b689c971d2141ee76e04 100644
--- a/core/modules/user/src/Tests/Views/ArgumentValidateTest.php
+++ b/core/modules/user/src/Tests/Views/ArgumentValidateTest.php
@@ -18,7 +18,7 @@ class ArgumentValidateTest extends UserTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view_argument_validate_user', 'test_view_argument_validate_username');
+  public static $testViews = ['test_view_argument_validate_user', 'test_view_argument_validate_username'];
 
   /**
    * A user for this test.
@@ -48,7 +48,7 @@ function testArgumentValidateUserUid() {
     // Fail for a valid numeric, but for a user that doesn't exist
     $this->assertFalse($view->argument['null']->validateArgument(32));
 
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $view->argument['null']->buildOptionsForm($form, $form_state);
     $sanitized_id = ArgumentPluginBase::encodeValidatorId('entity:user');
diff --git a/core/modules/user/src/Tests/Views/BulkFormAccessTest.php b/core/modules/user/src/Tests/Views/BulkFormAccessTest.php
index 3aa5f93f4e2fee3b35d74e68b7e3698bdd5acb1f..2b36240442a8c5094ce0438be829cb0441cee636 100644
--- a/core/modules/user/src/Tests/Views/BulkFormAccessTest.php
+++ b/core/modules/user/src/Tests/Views/BulkFormAccessTest.php
@@ -18,26 +18,26 @@ class BulkFormAccessTest extends UserTestBase {
    *
    * @var array
    */
-  public static $modules = array('user_access_test');
+  public static $modules = ['user_access_test'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_user_bulk_form');
+  public static $testViews = ['test_user_bulk_form'];
 
   /**
    * Tests if users that may not be edited, can not be edited in bulk.
    */
   public function testUserEditAccess() {
     // Create an authenticated user.
-    $no_edit_user = $this->drupalCreateUser(array(), 'no_edit');
+    $no_edit_user = $this->drupalCreateUser([], 'no_edit');
     // Ensure this account is not blocked.
     $this->assertFalse($no_edit_user->isBlocked(), 'The user is not blocked.');
 
     // Log in as user admin.
-    $admin_user = $this->drupalCreateUser(array('administer users'));
+    $admin_user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($admin_user);
 
     // Ensure that the account "no_edit" can not be edited.
@@ -46,10 +46,10 @@ public function testUserEditAccess() {
     $this->assertResponse(403, 'The user may not be edited.');
 
     // Test blocking the account "no_edit".
-    $edit = array(
+    $edit = [
       'user_bulk_form[' . ($no_edit_user->id() - 1) . ']' => TRUE,
       'action' => 'user_block_user_action',
-    );
+    ];
     $this->drupalPostForm('test-user-bulk-form', $edit, t('Apply to selected items'));
     $this->assertResponse(200);
 
@@ -67,10 +67,10 @@ public function testUserEditAccess() {
     $normal_user = $this->drupalCreateUser();
     $this->assertTrue($normal_user->access('update', $admin_user));
 
-    $edit = array(
+    $edit = [
       'user_bulk_form[' . ($normal_user->id() - 1) . ']' => TRUE,
       'action' => 'user_block_user_action',
-    );
+    ];
     $this->drupalPostForm('test-user-bulk-form', $edit, t('Apply to selected items'));
 
     $normal_user = User::load($normal_user->id());
@@ -79,10 +79,10 @@ public function testUserEditAccess() {
     // Log in as user without the 'administer users' permission.
     $this->drupalLogin($this->drupalCreateUser());
 
-    $edit = array(
+    $edit = [
       'user_bulk_form[' . ($normal_user->id() - 1) . ']' => TRUE,
       'action' => 'user_unblock_user_action',
-    );
+    ];
     $this->drupalPostForm('test-user-bulk-form', $edit, t('Apply to selected items'));
 
     // Re-load the normal user and ensure it is still blocked.
@@ -95,11 +95,11 @@ public function testUserEditAccess() {
    */
   public function testUserDeleteAccess() {
     // Create two authenticated users.
-    $account = $this->drupalCreateUser(array(), 'no_delete');
-    $account2 = $this->drupalCreateUser(array(), 'may_delete');
+    $account = $this->drupalCreateUser([], 'no_delete');
+    $account2 = $this->drupalCreateUser([], 'may_delete');
 
     // Log in as user admin.
-    $this->drupalLogin($this->drupalCreateUser(array('administer users')));
+    $this->drupalLogin($this->drupalCreateUser(['administer users']));
 
     // Ensure that the account "no_delete" can not be deleted.
     $this->drupalGet('user/' . $account->id() . '/cancel');
@@ -109,15 +109,15 @@ public function testUserDeleteAccess() {
     $this->assertResponse(200, 'The user "may_delete" may be deleted.');
 
     // Test deleting the accounts "no_delete" and "may_delete".
-    $edit = array(
+    $edit = [
       'user_bulk_form[' . ($account->id() - 1) . ']' => TRUE,
       'user_bulk_form[' . ($account2->id() - 1) . ']' => TRUE,
       'action' => 'user_cancel_user_action',
-    );
+    ];
     $this->drupalPostForm('test-user-bulk-form', $edit, t('Apply to selected items'));
-    $edit = array(
+    $edit = [
       'user_cancel_method' => 'user_cancel_delete',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Cancel accounts'));
 
     // Ensure the account "no_delete" still exists.
diff --git a/core/modules/user/src/Tests/Views/BulkFormTest.php b/core/modules/user/src/Tests/Views/BulkFormTest.php
index 00bdc821b013cc3180537ba3608868af5e436133..665af74a94c5cf312e2f75211f5a8e965bdf5692 100644
--- a/core/modules/user/src/Tests/Views/BulkFormTest.php
+++ b/core/modules/user/src/Tests/Views/BulkFormTest.php
@@ -19,33 +19,33 @@ class BulkFormTest extends UserTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui');
+  public static $modules = ['views_ui'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_user_bulk_form', 'test_user_bulk_form_combine_filter');
+  public static $testViews = ['test_user_bulk_form', 'test_user_bulk_form_combine_filter'];
 
   /**
    * Tests the user bulk form.
    */
   public function testBulkForm() {
     // Log in as a user without 'administer users'.
-    $this->drupalLogin($this->drupalCreateUser(array('administer permissions')));
+    $this->drupalLogin($this->drupalCreateUser(['administer permissions']));
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
 
     // Create an user which actually can change users.
-    $this->drupalLogin($this->drupalCreateUser(array('administer users')));
+    $this->drupalLogin($this->drupalCreateUser(['administer users']));
     $this->drupalGet('test-user-bulk-form');
     $result = $this->cssSelect('#edit-action option');
     $this->assertTrue(count($result) > 0);
 
     // Test submitting the page with no selection.
-    $edit = array(
+    $edit = [
       'action' => 'user_block_user_action',
-    );
+    ];
     $this->drupalPostForm('test-user-bulk-form', $edit, t('Apply to selected items'));
     $this->assertText(t('No users selected.'));
 
@@ -56,36 +56,36 @@ public function testBulkForm() {
     $role = key($roles);
 
     $this->assertFalse($account->hasRole($role), 'The user currently does not have a custom role.');
-    $edit = array(
+    $edit = [
       'user_bulk_form[1]' => TRUE,
       'action' => 'user_add_role_action.' . $role,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     // Re-load the user and check their roles.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertTrue($account->hasRole($role), 'The user now has the custom role.');
 
-    $edit = array(
+    $edit = [
       'user_bulk_form[1]' => TRUE,
       'action' => 'user_remove_role_action.' . $role,
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     // Re-load the user and check their roles.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertFalse($account->hasRole($role), 'The user no longer has the custom role.');
 
     // Block a user using the bulk form.
     $this->assertTrue($account->isActive(), 'The user is not blocked.');
     $this->assertRaw($account->label(), 'The user is found in the table.');
-    $edit = array(
+    $edit = [
       'user_bulk_form[1]' => TRUE,
       'action' => 'user_block_user_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     // Re-load the user and check their status.
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     $this->assertTrue($account->isBlocked(), 'The user is blocked.');
     $this->assertNoRaw($account->label(), 'The user is not found in the table.');
@@ -100,16 +100,16 @@ public function testBulkForm() {
     $this->assertText($this->config('user.settings')->get('anonymous'));
 
     // Attempt to block the anonymous user.
-    $edit = array(
+    $edit = [
       'user_bulk_form[0]' => TRUE,
       'action' => 'user_block_user_action',
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply to selected items'));
     $anonymous_account = $user_storage->load(0);
     $this->assertTrue($anonymous_account->isBlocked(), 'Ensure the anonymous user got blocked.');
 
     // Test the list of available actions with a value that contains a dot.
-    $this->drupalLogin($this->drupalCreateUser(array('administer permissions', 'administer views', 'administer users')));
+    $this->drupalLogin($this->drupalCreateUser(['administer permissions', 'administer views', 'administer users']));
     $action_id = 'user_add_role_action.' . $role;
     $edit = [
       'options[include_exclude]' => 'exclude',
@@ -134,7 +134,7 @@ public function testBulkFormCombineFilter() {
     User::load($this->users[0]->id());
     $view = Views::getView('test_user_bulk_form_combine_filter');
     $errors = $view->validate();
-    $this->assertEqual(reset($errors['default']), t('Field %field set in %filter is not usable for this filter type. Combined field filter only works for simple fields.', array('%field' => 'User: Bulk update', '%filter' => 'Global: Combine fields filter')));
+    $this->assertEqual(reset($errors['default']), t('Field %field set in %filter is not usable for this filter type. Combined field filter only works for simple fields.', ['%field' => 'User: Bulk update', '%filter' => 'Global: Combine fields filter']));
   }
 
 }
diff --git a/core/modules/user/src/Tests/Views/FilterPermissionUiTest.php b/core/modules/user/src/Tests/Views/FilterPermissionUiTest.php
index e55c6c38e12d4d101df6b0c1b87589f951cb4e44..f9444bc7d70af3b630010e1ffaaf445ae178161c 100644
--- a/core/modules/user/src/Tests/Views/FilterPermissionUiTest.php
+++ b/core/modules/user/src/Tests/Views/FilterPermissionUiTest.php
@@ -30,7 +30,7 @@ class FilterPermissionUiTest extends ViewTestBase {
   protected function setUp() {
     parent::setUp(TRUE);
 
-    ViewTestData::createTestViews(get_class($this), array('user_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['user_test_views']);
     $this->enableViewsTestModule();
   }
 
diff --git a/core/modules/user/src/Tests/Views/HandlerArgumentUserUidTest.php b/core/modules/user/src/Tests/Views/HandlerArgumentUserUidTest.php
index d84a5425284e08ec409c30f10011131e87d281d4..73ee53fabbf0869eb0a70e2a7a36d859319770e4 100644
--- a/core/modules/user/src/Tests/Views/HandlerArgumentUserUidTest.php
+++ b/core/modules/user/src/Tests/Views/HandlerArgumentUserUidTest.php
@@ -16,7 +16,7 @@ class HandlerArgumentUserUidTest extends UserTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_user_uid_argument');
+  public static $testViews = ['test_user_uid_argument'];
 
   /**
    * Tests the generated title of an user: uid argument.
@@ -25,29 +25,29 @@ public function testArgumentTitle() {
     $view = Views::getView('test_user_uid_argument');
 
     // Tests an invalid user uid.
-    $this->executeView($view, array(rand(1000, 10000)));
+    $this->executeView($view, [rand(1000, 10000)]);
     $this->assertFalse($view->getTitle());
     $view->destroy();
 
     // Tests a valid user.
     $account = $this->drupalCreateUser();
-    $this->executeView($view, array($account->id()));
+    $this->executeView($view, [$account->id()]);
     $this->assertEqual($view->getTitle(), $account->label());
     $view->destroy();
 
     // Tests the anonymous user.
     $anonymous = $this->config('user.settings')->get('anonymous');
-    $this->executeView($view, array(0));
+    $this->executeView($view, [0]);
     $this->assertEqual($view->getTitle(), $anonymous);
     $view->destroy();
 
     $view->getDisplay()->getHandler('argument', 'uid')->options['break_phrase'] = TRUE;
-    $this->executeView($view, array($account->id() . ',0'));
+    $this->executeView($view, [$account->id() . ',0']);
     $this->assertEqual($view->getTitle(), $account->label() . ', ' . $anonymous);
     $view->destroy();
 
     $view->getDisplay()->getHandler('argument', 'uid')->options['break_phrase'] = TRUE;
-    $this->executeView($view, array('0,' . $account->id()));
+    $this->executeView($view, ['0,' . $account->id()]);
     $this->assertEqual($view->getTitle(), $anonymous . ', ' . $account->label());
     $view->destroy();
   }
diff --git a/core/modules/user/src/Tests/Views/HandlerFieldRoleTest.php b/core/modules/user/src/Tests/Views/HandlerFieldRoleTest.php
index de7c65c906b77e4c04fc8dd301efd55fc6507e88..6a5ebfc64820c296ca34f67fb2c8a6e5d9e64485 100644
--- a/core/modules/user/src/Tests/Views/HandlerFieldRoleTest.php
+++ b/core/modules/user/src/Tests/Views/HandlerFieldRoleTest.php
@@ -18,18 +18,18 @@ class HandlerFieldRoleTest extends UserTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_views_handler_field_role');
+  public static $testViews = ['test_views_handler_field_role'];
 
   public function testRole() {
     // Create a couple of roles for the view.
     $rolename_a = 'a' . $this->randomMachineName(8);
-    $this->drupalCreateRole(array('access content'), $rolename_a, '<em>' . $rolename_a . '</em>', 9);
+    $this->drupalCreateRole(['access content'], $rolename_a, '<em>' . $rolename_a . '</em>', 9);
 
     $rolename_b = 'b' . $this->randomMachineName(8);
-    $this->drupalCreateRole(array('access content'), $rolename_b, $rolename_b, 8);
+    $this->drupalCreateRole(['access content'], $rolename_b, $rolename_b, 8);
 
     $rolename_not_assigned = $this->randomMachineName(8);
-    $this->drupalCreateRole(array('access content'), $rolename_not_assigned, $rolename_not_assigned);
+    $this->drupalCreateRole(['access content'], $rolename_not_assigned, $rolename_not_assigned);
 
     // Add roles to user 1.
     $user = User::load(1);
diff --git a/core/modules/user/src/Tests/Views/HandlerFieldUserNameTest.php b/core/modules/user/src/Tests/Views/HandlerFieldUserNameTest.php
index 6af16447eb9d018659e06bcde4587452b4a7f0fc..39a3ec87c10f1b473407462368144627e99bd147 100644
--- a/core/modules/user/src/Tests/Views/HandlerFieldUserNameTest.php
+++ b/core/modules/user/src/Tests/Views/HandlerFieldUserNameTest.php
@@ -18,13 +18,13 @@ class HandlerFieldUserNameTest extends UserTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_views_handler_field_user_name');
+  public static $testViews = ['test_views_handler_field_user_name'];
 
   public function testUserName() {
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
     $renderer = \Drupal::service('renderer');
 
-    $new_user = $this->drupalCreateUser(array('access user profiles'));
+    $new_user = $this->drupalCreateUser(['access user profiles']);
     $this->drupalLogin($new_user);
 
     // Set defaults.
diff --git a/core/modules/user/src/Tests/Views/HandlerFilterUserNameTest.php b/core/modules/user/src/Tests/Views/HandlerFilterUserNameTest.php
index eaf24aa0fd6228b728a3ab0af4371b96fc75758f..c4f70656c82f5fb018697ba612c7265bdacc08ae 100644
--- a/core/modules/user/src/Tests/Views/HandlerFilterUserNameTest.php
+++ b/core/modules/user/src/Tests/Views/HandlerFilterUserNameTest.php
@@ -19,47 +19,47 @@ class HandlerFilterUserNameTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'user_test_views');
+  public static $modules = ['views_ui', 'user_test_views'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_user_name');
+  public static $testViews = ['test_user_name'];
 
   /**
    * Accounts used by this test.
    *
    * @var array
    */
-  protected $accounts = array();
+  protected $accounts = [];
 
   /**
    * Usernames of $accounts.
    *
    * @var array
    */
-  protected $names = array();
+  protected $names = [];
 
   /**
    * Stores the column map for this testCase.
    *
    * @var array
    */
-  public $columnMap = array(
+  public $columnMap = [
     'uid' => 'uid',
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('user_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['user_test_views']);
 
     $this->enableViewsTestModule();
 
-    $this->accounts = array();
-    $this->names = array();
+    $this->accounts = [];
+    $this->names = [];
     for ($i = 0; $i < 3; $i++) {
       $this->accounts[] = $account = $this->drupalCreateUser();
       $this->names[] = $account->label();
@@ -74,10 +74,10 @@ public function testUserNameApi() {
     $view = Views::getView('test_user_name');
 
     $view->initHandlers();
-    $view->filter['uid']->value = array($this->accounts[0]->id());
+    $view->filter['uid']->value = [$this->accounts[0]->id()];
 
     $this->executeView($view);
-    $this->assertIdenticalResultset($view, array(array('uid' => $this->accounts[0]->id())), $this->columnMap);
+    $this->assertIdenticalResultset($view, [['uid' => $this->accounts[0]->id()]], $this->columnMap);
 
     $this->assertEqual($view->filter['uid']->getValueOptions(), NULL);
   }
@@ -86,40 +86,40 @@ public function testUserNameApi() {
    * Tests using the user interface.
    */
   public function testAdminUserInterface() {
-    $admin_user = $this->drupalCreateUser(array('administer views', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer views', 'administer site configuration']);
     $this->drupalLogin($admin_user);
 
     $path = 'admin/structure/views/nojs/handler/test_user_name/default/filter/uid';
     $this->drupalGet($path);
 
     // Pass in an invalid username, the validation should catch it.
-    $users = array($this->randomMachineName());
+    $users = [$this->randomMachineName()];
     $users = array_map('strtolower', $users);
-    $edit = array(
+    $edit = [
       'options[value]' => implode(', ', $users)
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Apply'));
-    $this->assertRaw(t('There are no entities matching "%value".', array('%value' => implode(', ', $users))));
+    $this->assertRaw(t('There are no entities matching "%value".', ['%value' => implode(', ', $users)]));
 
     // Pass in an invalid username and a valid username.
     $random_name = $this->randomMachineName();
-    $users = array($random_name, $this->names[0]);
+    $users = [$random_name, $this->names[0]];
     $users = array_map('strtolower', $users);
-    $edit = array(
+    $edit = [
       'options[value]' => implode(', ', $users)
-    );
-    $users = array($users[0]);
+    ];
+    $users = [$users[0]];
     $this->drupalPostForm($path, $edit, t('Apply'));
-    $this->assertRaw(t('There are no entities matching "%value".', array('%value' => implode(', ', $users))));
+    $this->assertRaw(t('There are no entities matching "%value".', ['%value' => implode(', ', $users)]));
 
     // Pass in just valid usernames.
     $users = $this->names;
     $users = array_map('strtolower', $users);
-    $edit = array(
+    $edit = [
       'options[value]' => implode(', ', $users)
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Apply'));
-    $this->assertNoRaw(t('There are no entities matching "%value".', array('%value' => implode(', ', $users))));
+    $this->assertNoRaw(t('There are no entities matching "%value".', ['%value' => implode(', ', $users)]));
   }
 
   /**
@@ -128,14 +128,14 @@ public function testAdminUserInterface() {
   public function testExposedFilter() {
     $path = 'test_user_name';
 
-    $options = array();
+    $options = [];
 
     // Pass in an invalid username, the validation should catch it.
-    $users = array($this->randomMachineName());
+    $users = [$this->randomMachineName()];
     $users = array_map('strtolower', $users);
     $options['query']['uid'] = implode(', ', $users);
     $this->drupalGet($path, $options);
-    $this->assertRaw(t('There are no entities matching "%value".', array('%value' => implode(', ', $users))));
+    $this->assertRaw(t('There are no entities matching "%value".', ['%value' => implode(', ', $users)]));
 
     // Pass in an invalid target_id in for the entity_autocomplete value format.
     // There should be no errors, but all results should be returned as the
@@ -149,13 +149,13 @@ public function testExposedFilter() {
     }
 
     // Pass in an invalid username and a valid username.
-    $users = array($this->randomMachineName(), $this->names[0]);
+    $users = [$this->randomMachineName(), $this->names[0]];
     $users = array_map('strtolower', $users);
     $options['query']['uid'] = implode(', ', $users);
-    $users = array($users[0]);
+    $users = [$users[0]];
 
     $this->drupalGet($path, $options);
-    $this->assertRaw(t('There are no entities matching "%value".', array('%value' => implode(', ', $users))));
+    $this->assertRaw(t('There are no entities matching "%value".', ['%value' => implode(', ', $users)]));
 
     // Pass in just valid usernames.
     $users = $this->names;
diff --git a/core/modules/user/src/Tests/Views/RelationshipRepresentativeNodeTest.php b/core/modules/user/src/Tests/Views/RelationshipRepresentativeNodeTest.php
index 3ad6346a5359b604b7809aca4f3341dcb463390b..14f44123e3ea0fb82e0d5c0bcc1d0a4401768585 100644
--- a/core/modules/user/src/Tests/Views/RelationshipRepresentativeNodeTest.php
+++ b/core/modules/user/src/Tests/Views/RelationshipRepresentativeNodeTest.php
@@ -16,7 +16,7 @@ class RelationshipRepresentativeNodeTest extends UserTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_groupwise_user');
+  public static $testViews = ['test_groupwise_user'];
 
   /**
    * Tests the relationship.
@@ -24,17 +24,17 @@ class RelationshipRepresentativeNodeTest extends UserTestBase {
   public function testRelationship() {
     $view = Views::getView('test_groupwise_user');
     $this->executeView($view);
-    $map = array('node_field_data_users_field_data_nid' => 'nid', 'uid' => 'uid');
-    $expected_result = array(
-      array(
+    $map = ['node_field_data_users_field_data_nid' => 'nid', 'uid' => 'uid'];
+    $expected_result = [
+      [
         'uid' => $this->users[1]->id(),
         'nid' => $this->nodes[1]->id(),
-      ),
-      array(
+      ],
+      [
         'uid' => $this->users[0]->id(),
         'nid' => $this->nodes[0]->id(),
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $map);
   }
 
diff --git a/core/modules/user/src/Tests/Views/RolesRidArgumentTest.php b/core/modules/user/src/Tests/Views/RolesRidArgumentTest.php
index a658b2202b41dffb94e04d32ec6cbf40b35c9100..58782e94c76499d31daae04a9c7d46291d9a4a76 100644
--- a/core/modules/user/src/Tests/Views/RolesRidArgumentTest.php
+++ b/core/modules/user/src/Tests/Views/RolesRidArgumentTest.php
@@ -15,7 +15,7 @@ class RolesRidArgumentTest extends UserTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_user_roles_rid');
+  public static $testViews = ['test_user_roles_rid'];
 
   /**
    * Tests the generated title of a user: roles argument.
diff --git a/core/modules/user/src/Tests/Views/UserChangedTest.php b/core/modules/user/src/Tests/Views/UserChangedTest.php
index 50e21e588850e7f8e37bb50408f2424c7ef6122e..ddd7903e546c725c04cd0eb580dcc5a65144158e 100644
--- a/core/modules/user/src/Tests/Views/UserChangedTest.php
+++ b/core/modules/user/src/Tests/Views/UserChangedTest.php
@@ -17,19 +17,19 @@ class UserChangedTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'user_test_views');
+  public static $modules = ['views_ui', 'user_test_views'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_user_changed');
+  public static $testViews = ['test_user_changed'];
 
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('user_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['user_test_views']);
 
     $this->enableViewsTestModule();
   }
@@ -40,7 +40,7 @@ protected function setUp() {
   public function testChangedField() {
     $path = 'test_user_changed';
 
-    $options = array();
+    $options = [];
 
     $this->drupalGet($path, $options);
 
diff --git a/core/modules/user/src/Tests/Views/UserDataTest.php b/core/modules/user/src/Tests/Views/UserDataTest.php
index a55eac5e761a14a69782cf8635e9499196c4a8d3..4628ae2b7de473ed390b485b721be781fcda8089 100644
--- a/core/modules/user/src/Tests/Views/UserDataTest.php
+++ b/core/modules/user/src/Tests/Views/UserDataTest.php
@@ -24,7 +24,7 @@ class UserDataTest extends UserTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_user_data');
+  public static $testViews = ['test_user_data'];
 
   /**
    * Tests field handler.
diff --git a/core/modules/user/src/Tests/Views/UserTestBase.php b/core/modules/user/src/Tests/Views/UserTestBase.php
index 4c8007aeb3f0e31011311178d8c767557584b4ca..c49dcb2379c035bb7453bb80880eb0faa701b99d 100644
--- a/core/modules/user/src/Tests/Views/UserTestBase.php
+++ b/core/modules/user/src/Tests/Views/UserTestBase.php
@@ -16,31 +16,31 @@ abstract class UserTestBase extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('user_test_views', 'node');
+  public static $modules = ['user_test_views', 'node'];
 
   /**
    * Users to use during this test.
    *
    * @var array
    */
-  protected $users = array();
+  protected $users = [];
 
   /**
    * Nodes to use during this test.
    *
    * @var array
    */
-  protected $nodes = array();
+  protected $nodes = [];
 
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('user_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['user_test_views']);
 
     $this->users[] = $this->drupalCreateUser();
     $this->users[] = User::load(1);
-    $this->nodes[] = $this->drupalCreateNode(array('uid' => $this->users[0]->id()));
-    $this->nodes[] = $this->drupalCreateNode(array('uid' => 1));
+    $this->nodes[] = $this->drupalCreateNode(['uid' => $this->users[0]->id()]);
+    $this->nodes[] = $this->drupalCreateNode(['uid' => 1]);
   }
 
 }
diff --git a/core/modules/user/src/UserAccessControlHandler.php b/core/modules/user/src/UserAccessControlHandler.php
index dd7142c5c4f5d56a39fc7a7bccf1cc0ac3d169f1..712b32ab5151796204cd9c7ca4e8bec194d2c303 100644
--- a/core/modules/user/src/UserAccessControlHandler.php
+++ b/core/modules/user/src/UserAccessControlHandler.php
@@ -80,9 +80,9 @@ protected function checkAccess(EntityInterface $entity, $operation, AccountInter
    */
   protected function checkFieldAccess($operation, FieldDefinitionInterface $field_definition, AccountInterface $account, FieldItemListInterface $items = NULL) {
     // Fields that are not implicitly allowed to administrative users.
-    $explicit_check_fields = array(
+    $explicit_check_fields = [
       'pass',
-    );
+    ];
 
     // Administrative users are allowed to edit and view all fields.
     if (!in_array($field_definition->getName(), $explicit_check_fields) && $account->hasPermission('administer users')) {
diff --git a/core/modules/user/src/UserAuth.php b/core/modules/user/src/UserAuth.php
index 9fbcf094869738026345329bb8b2d1eda21d9617..43ce31b862066aedc82c8a24a472c7103812083e 100644
--- a/core/modules/user/src/UserAuth.php
+++ b/core/modules/user/src/UserAuth.php
@@ -44,7 +44,7 @@ public function authenticate($username, $password) {
     $uid = FALSE;
 
     if (!empty($username) && strlen($password) > 0) {
-      $account_search = $this->entityManager->getStorage('user')->loadByProperties(array('name' => $username));
+      $account_search = $this->entityManager->getStorage('user')->loadByProperties(['name' => $username]);
 
       if ($account = reset($account_search)) {
         if ($this->passwordChecker->check($password, $account->getPassword())) {
diff --git a/core/modules/user/src/UserData.php b/core/modules/user/src/UserData.php
index 3418c838466e703dae7e8c8df2beabf788d4fc71..735c3de4e61435ae89cdcd5c3c5e620692d68813 100644
--- a/core/modules/user/src/UserData.php
+++ b/core/modules/user/src/UserData.php
@@ -50,7 +50,7 @@ public function get($module, $uid = NULL, $name = NULL) {
     }
     // If $module and $uid was passed, return the name/value pairs.
     elseif (isset($uid)) {
-      $return = array();
+      $return = [];
       foreach ($result as $record) {
         $return[$record->name] = ($record->serialized ? unserialize($record->value) : $record->value);
       }
@@ -58,7 +58,7 @@ public function get($module, $uid = NULL, $name = NULL) {
     }
     // If $module and $name was passed, return the uid/value pairs.
     elseif (isset($name)) {
-      $return = array();
+      $return = [];
       foreach ($result as $record) {
         $return[$record->uid] = ($record->serialized ? unserialize($record->value) : $record->value);
       }
@@ -66,7 +66,7 @@ public function get($module, $uid = NULL, $name = NULL) {
     }
     // If only $module was passed, return data keyed by uid and name.
     else {
-      $return = array();
+      $return = [];
       foreach ($result as $record) {
         $return[$record->uid][$record->name] = ($record->serialized ? unserialize($record->value) : $record->value);
       }
@@ -84,15 +84,15 @@ public function set($module, $uid, $name, $value) {
       $serialized = 1;
     }
     $this->connection->merge('users_data')
-      ->keys(array(
+      ->keys([
         'uid' => $uid,
         'module' => $module,
         'name' => $name,
-      ))
-      ->fields(array(
+      ])
+      ->fields([
         'value' => $value,
         'serialized' => $serialized,
-      ))
+      ])
       ->execute();
   }
 
diff --git a/core/modules/user/src/UserListBuilder.php b/core/modules/user/src/UserListBuilder.php
index 9dae5f4a23eb26be5775751e2239e4ff358519b6..306d04609e76169126aa66cb96041a331fd43549 100644
--- a/core/modules/user/src/UserListBuilder.php
+++ b/core/modules/user/src/UserListBuilder.php
@@ -79,36 +79,36 @@ public function load() {
    * {@inheritdoc}
    */
   public function buildHeader() {
-    $header = array(
-      'username' => array(
+    $header = [
+      'username' => [
         'data' => $this->t('Username'),
         'field' => 'name',
         'specifier' => 'name',
-      ),
-      'status' => array(
+      ],
+      'status' => [
         'data' => $this->t('Status'),
         'field' => 'status',
         'specifier' => 'status',
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      ),
-      'roles' => array(
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ],
+      'roles' => [
         'data' => $this->t('Roles'),
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      ),
-      'member_for' => array(
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ],
+      'member_for' => [
         'data' => $this->t('Member for'),
         'field' => 'created',
         'specifier' => 'created',
         'sort' => 'desc',
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      ),
-      'access' => array(
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ],
+      'access' => [
         'data' => $this->t('Last access'),
         'field' => 'access',
         'specifier' => 'access',
-        'class' => array(RESPONSIVE_PRIORITY_LOW),
-      ),
-    );
+        'class' => [RESPONSIVE_PRIORITY_LOW],
+      ],
+    ];
     return $header + parent::buildHeader();
   }
 
@@ -116,25 +116,25 @@ public function buildHeader() {
    * {@inheritdoc}
    */
   public function buildRow(EntityInterface $entity) {
-    $row['username']['data'] = array(
+    $row['username']['data'] = [
       '#theme' => 'username',
       '#account' => $entity,
-    );
+    ];
     $row['status'] = $entity->isActive() ? $this->t('active') : $this->t('blocked');
 
     $roles = user_role_names(TRUE);
     unset($roles[RoleInterface::AUTHENTICATED_ID]);
-    $users_roles = array();
+    $users_roles = [];
     foreach ($entity->getRoles() as $role) {
       if (isset($roles[$role])) {
         $users_roles[] = $roles[$role];
       }
     }
     asort($users_roles);
-    $row['roles']['data'] = array(
+    $row['roles']['data'] = [
       '#theme' => 'item_list',
       '#items' => $users_roles,
-    );
+    ];
     $options = [
       'return_as_object' => TRUE,
     ];
diff --git a/core/modules/user/src/UserStorage.php b/core/modules/user/src/UserStorage.php
index 1c5a54a8afff254ae382130a92fd2dbb44ec44db..809f3e384b73ee51827eccd5b15e85d88babcd86 100644
--- a/core/modules/user/src/UserStorage.php
+++ b/core/modules/user/src/UserStorage.php
@@ -40,11 +40,11 @@ protected function isColumnSerial($table_name, $schema_name) {
    */
   public function updateLastLoginTimestamp(UserInterface $account) {
     $this->database->update('users_field_data')
-      ->fields(array('login' => $account->getLastLoginTime()))
+      ->fields(['login' => $account->getLastLoginTime()])
       ->condition('uid', $account->id())
       ->execute();
     // Ensure that the entity cache is cleared.
-    $this->resetCache(array($account->id()));
+    $this->resetCache([$account->id()]);
   }
 
   /**
@@ -52,13 +52,13 @@ public function updateLastLoginTimestamp(UserInterface $account) {
    */
   public function updateLastAccessTimestamp(AccountInterface $account, $timestamp) {
     $this->database->update('users_field_data')
-      ->fields(array(
+      ->fields([
         'access' => $timestamp,
-      ))
+      ])
       ->condition('uid', $account->id())
       ->execute();
     // Ensure that the entity cache is cleared.
-    $this->resetCache(array($account->id()));
+    $this->resetCache([$account->id()]);
   }
 
   /**
diff --git a/core/modules/user/src/UserStorageSchema.php b/core/modules/user/src/UserStorageSchema.php
index c8c3e46e8375d3939e81364aff9eaf0975e0b6e1..5e590b8958cc6de7a66ed5b4ef1a4d9d5eff9b33 100644
--- a/core/modules/user/src/UserStorageSchema.php
+++ b/core/modules/user/src/UserStorageSchema.php
@@ -17,9 +17,9 @@ class UserStorageSchema extends SqlContentEntityStorageSchema {
   protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $reset = FALSE) {
     $schema = parent::getEntitySchema($entity_type, $reset);
 
-    $schema['users_field_data']['unique keys'] += array(
-      'user__name' => array('name', 'langcode'),
-    );
+    $schema['users_field_data']['unique keys'] += [
+      'user__name' => ['name', 'langcode'],
+    ];
 
     return $schema;
   }
diff --git a/core/modules/user/src/UserViewsData.php b/core/modules/user/src/UserViewsData.php
index e2229112eb6fd00047ec6ccdc73c409227079b9f..2c79114790540d374753bdc195f12e12c9a832be 100644
--- a/core/modules/user/src/UserViewsData.php
+++ b/core/modules/user/src/UserViewsData.php
@@ -21,15 +21,15 @@ public function getViewsData() {
     $data['users_field_data']['table']['wizard_id'] = 'user';
 
     $data['users_field_data']['uid']['argument']['id'] = 'user_uid';
-    $data['users_field_data']['uid']['argument'] += array(
+    $data['users_field_data']['uid']['argument'] += [
       'name table' => 'users_field_data',
       'name field' => 'name',
       'empty field name' => \Drupal::config('user.settings')->get('anonymous'),
-    );
+    ];
     $data['users_field_data']['uid']['filter']['id'] = 'user_name';
     $data['users_field_data']['uid']['filter']['title'] = $this->t('Name (autocomplete)');
     $data['users_field_data']['uid']['filter']['help'] = $this->t('The user or author name. Uses an autocomplete widget to find a user name, the actual filter uses the resulting user ID.');
-    $data['users_field_data']['uid']['relationship'] = array(
+    $data['users_field_data']['uid']['relationship'] = [
       'title' => $this->t('Content authored'),
       'help' => $this->t('Relate content to the user who created it. This relationship will create one record for each content item created by the user.'),
       'id' => 'standard',
@@ -37,19 +37,19 @@ public function getViewsData() {
       'base field' => 'uid',
       'field' => 'uid',
       'label' => $this->t('nodes'),
-    );
+    ];
 
-    $data['users_field_data']['uid_raw'] = array(
+    $data['users_field_data']['uid_raw'] = [
       'help' => $this->t('The raw numeric user ID.'),
       'real field' => 'uid',
-      'filter' => array(
+      'filter' => [
         'title' => $this->t('The user ID'),
         'id' => 'numeric',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['uid_representative'] = array(
-      'relationship' => array(
+    $data['users_field_data']['uid_representative'] = [
+      'relationship' => [
         'title' => $this->t('Representative node'),
         'label'  => $this->t('Representative node'),
         'help' => $this->t('Obtains a single representative node for each user, according to a chosen sort criterion.'),
@@ -61,18 +61,18 @@ public function getViewsData() {
         'base' => 'node_field_data',
         'field' => 'nid',
         'relationship' => 'node_field_data:uid'
-      ),
-    );
+      ],
+    ];
 
-    $data['users']['uid_current'] = array(
+    $data['users']['uid_current'] = [
       'real field' => 'uid',
       'title' => $this->t('Current'),
       'help' => $this->t('Filter the view to the currently logged in user.'),
-      'filter' => array(
+      'filter' => [
         'id' => 'user_current',
         'type' => 'yes-no',
-      ),
-    );
+      ],
+    ];
 
     $data['users_field_data']['name']['help'] = $this->t('The user or author name.');
     $data['users_field_data']['name']['field']['default_formatter'] = 'user_name';
@@ -90,178 +90,178 @@ public function getViewsData() {
     $data['users_field_data']['preferred_admin_langcode']['title'] = $this->t('Preferred admin language');
     $data['users_field_data']['preferred_admin_langcode']['help'] = $this->t('Preferred administrative language of the user');
 
-    $data['users_field_data']['created_fulldate'] = array(
+    $data['users_field_data']['created_fulldate'] = [
       'title' => $this->t('Created date'),
       'help' => $this->t('Date in the form of CCYYMMDD.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_fulldate',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['created_year_month'] = array(
+    $data['users_field_data']['created_year_month'] = [
       'title' => $this->t('Created year + month'),
       'help' => $this->t('Date in the form of YYYYMM.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_year_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['created_year'] = array(
+    $data['users_field_data']['created_year'] = [
       'title' => $this->t('Created year'),
       'help' => $this->t('Date in the form of YYYY.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_year',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['created_month'] = array(
+    $data['users_field_data']['created_month'] = [
       'title' => $this->t('Created month'),
       'help' => $this->t('Date in the form of MM (01 - 12).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['created_day'] = array(
+    $data['users_field_data']['created_day'] = [
       'title' => $this->t('Created day'),
       'help' => $this->t('Date in the form of DD (01 - 31).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_day',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['created_week'] = array(
+    $data['users_field_data']['created_week'] = [
       'title' => $this->t('Created week'),
       'help' => $this->t('Date in the form of WW (01 - 53).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'created',
         'id' => 'date_week',
-      ),
-    );
+      ],
+    ];
 
     $data['users_field_data']['status']['filter']['label'] = $this->t('Active');
     $data['users_field_data']['status']['filter']['type'] = 'yes-no';
 
     $data['users_field_data']['changed']['title'] = $this->t('Updated date');
 
-    $data['users_field_data']['changed_fulldate'] = array(
+    $data['users_field_data']['changed_fulldate'] = [
       'title' => $this->t('Updated date'),
       'help' => $this->t('Date in the form of CCYYMMDD.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_fulldate',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['changed_year_month'] = array(
+    $data['users_field_data']['changed_year_month'] = [
       'title' => $this->t('Updated year + month'),
       'help' => $this->t('Date in the form of YYYYMM.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_year_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['changed_year'] = array(
+    $data['users_field_data']['changed_year'] = [
       'title' => $this->t('Updated year'),
       'help' => $this->t('Date in the form of YYYY.'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_year',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['changed_month'] = array(
+    $data['users_field_data']['changed_month'] = [
       'title' => $this->t('Updated month'),
       'help' => $this->t('Date in the form of MM (01 - 12).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_month',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['changed_day'] = array(
+    $data['users_field_data']['changed_day'] = [
       'title' => $this->t('Updated day'),
       'help' => $this->t('Date in the form of DD (01 - 31).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_day',
-      ),
-    );
+      ],
+    ];
 
-    $data['users_field_data']['changed_week'] = array(
+    $data['users_field_data']['changed_week'] = [
       'title' => $this->t('Updated week'),
       'help' => $this->t('Date in the form of WW (01 - 53).'),
-      'argument' => array(
+      'argument' => [
         'field' => 'changed',
         'id' => 'date_week',
-      ),
-    );
+      ],
+    ];
 
-    $data['users']['data'] = array(
+    $data['users']['data'] = [
       'title' => $this->t('Data'),
       'help' => $this->t('Provides access to the user data service.'),
       'real field' => 'uid',
-      'field' => array(
+      'field' => [
         'id' => 'user_data',
-      ),
-    );
+      ],
+    ];
 
-    $data['users']['user_bulk_form'] = array(
+    $data['users']['user_bulk_form'] = [
       'title' => $this->t('Bulk update'),
       'help' => $this->t('Add a form element that lets you run operations on multiple users.'),
-      'field' => array(
+      'field' => [
         'id' => 'user_bulk_form',
-      ),
-    );
+      ],
+    ];
 
     $data['user__roles']['table']['group']  = $this->t('User');
 
-    $data['user__roles']['table']['join'] = array(
-      'users_field_data' => array(
+    $data['user__roles']['table']['join'] = [
+      'users_field_data' => [
         'left_field' => 'uid',
         'field' => 'entity_id',
-      ),
-    );
+      ],
+    ];
 
-    $data['user__roles']['roles_target_id'] = array(
+    $data['user__roles']['roles_target_id'] = [
       'title' => $this->t('Roles'),
       'help' => $this->t('Roles that a user belongs to.'),
-      'field' => array(
+      'field' => [
         'id' => 'user_roles',
         'no group by' => TRUE,
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'user_roles',
         'allow empty' => TRUE,
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'user__roles_rid',
         'name table' => 'role',
         'name field' => 'name',
         'empty field name' => $this->t('No role'),
         'zero is null' => TRUE,
         'numeric' => TRUE,
-      ),
-    );
+      ],
+    ];
 
-    $data['user__roles']['permission'] = array(
+    $data['user__roles']['permission'] = [
       'title' => $this->t('Permission'),
       'help' => $this->t('The user permissions.'),
-      'field' => array(
+      'field' => [
         'id' => 'user_permissions',
         'no group by' => TRUE,
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'user_permissions',
         'real field' => 'roles_target_id',
-      ),
-    );
+      ],
+    ];
 
     return $data;
   }
diff --git a/core/modules/user/tests/fixtures/update/drupal-8.user-email-token-2587275.php b/core/modules/user/tests/fixtures/update/drupal-8.user-email-token-2587275.php
index 75ec703f8c76b48975cfff57618b87fa14e3d8fa..eaa2a9a618cbd91de4fc8c7676ed38cf0b86ae21 100644
--- a/core/modules/user/tests/fixtures/update/drupal-8.user-email-token-2587275.php
+++ b/core/modules/user/tests/fixtures/update/drupal-8.user-email-token-2587275.php
@@ -14,9 +14,9 @@
 // already.
 $connection->delete('config')->condition('name', 'user.mail')->execute();
 $connection->insert('config')
-  ->fields(array('collection', 'name', 'data'))
-  ->values(array(
+  ->fields(['collection', 'name', 'data'])
+  ->values([
   'collection' => '',
   'name' => 'user.mail',
   'data' => "a:10:{s:14:\"cancel_confirm\";a:2:{s:4:\"body\";s:369:\"[user:name],\n\nA request to cancel your account has been made at [site:name].\n\nYou may now cancel your account on [site:url-brief] by clicking this link or copying and pasting it into your browser:\n\n[user:cancel-url]\n\nNOTE: The cancellation of your account is not reversible.\n\nThis link expires in one day and nothing will happen if it is not used.\n\n--  [site:name] team\";s:7:\"subject\";s:59:\"Account cancellation request for [user:name] at [site:name]\";}s:14:\"password_reset\";a:2:{s:4:\"body\";s:397:\"[user:name],\n\nA request to reset the password for your account has been made at [site:name].\n\nYou may now log in by clicking this link or copying and pasting it to your browser:\n\n[user:one-time-login-url]\n\nThis link can only be used once to log in and will lead you to a page where you can set your password. It expires after one day and nothing will happen if it's not used.\n\n--  [site:name] team\";s:7:\"subject\";s:60:\"Replacement login information for [user:name] at [site:name]\";}s:22:\"register_admin_created\";a:2:{s:4:\"body\";s:463:\"[user:name],\n\nA site administrator at [site:name] has created an account for you. You may now log in by clicking this link or copying and pasting it to your browser:\n\n[user:one-time-login-url]\n\nThis link can only be used once to log in and will lead you to a page where you can set your password.\n\nAfter setting your password, you will be able to log in at [site:login-url] in the future using:\n\nusername: [user:name]\npassword: Your password\n\n--  [site:name] team\";s:7:\"subject\";s:58:\"An administrator created an account for you at [site:name]\";}s:29:\"register_no_approval_required\";a:2:{s:4:\"body\";s:437:\"[user:name],\n\nThank you for registering at [site:name]. You may now log in by clicking this link or copying and pasting it to your browser:\n\n[user:one-time-login-url]\n\nThis link can only be used once to log in and will lead you to a page where you can set your password.\n\nAfter setting your password, you will be able to log in at [site:login-url] in the future using:\n\nusername: [user:name]\npassword: Your password\n\n--  [site:name] team\";s:7:\"subject\";s:46:\"Account details for [user:name] at [site:name]\";}s:25:\"register_pending_approval\";a:2:{s:4:\"body\";s:281:\"[user:name],\n\nThank you for registering at [site:name]. Your application for an account is currently pending approval. Once it has been approved, you will receive another email containing information about how to log in, set your password, and other details.\n\n\n--  [site:name] team\";s:7:\"subject\";s:71:\"Account details for [user:name] at [site:name] (pending admin approval)\";}s:31:\"register_pending_approval_admin\";a:2:{s:4:\"body\";s:56:\"[user:name] has applied for an account.\n\n[user:edit-url]\";s:7:\"subject\";s:71:\"Account details for [user:name] at [site:name] (pending admin approval)\";}s:16:\"status_activated\";a:2:{s:4:\"body\";s:446:\"[user:name],\n\nYour account at [site:name] has been activated.\n\nYou may now log in by clicking this link or copying and pasting it into your browser:\n\n[user:one-time-login-url]\n\nThis link can only be used once to log in and will lead you to a page where you can set your password.\n\nAfter setting your password, you will be able to log in at [site:login-url] in the future using:\n\nusername: [user:name]\npassword: Your password\n\n--  [site:name] team\";s:7:\"subject\";s:57:\"Account details for [user:name] at [site:name] (approved)\";}s:14:\"status_blocked\";a:2:{s:4:\"body\";s:89:\"[user:name],\n\nYour account on [site:account-name] has been blocked.\n\n--  [site:name] team\";s:7:\"subject\";s:56:\"Account details for [user:name] at [site:name] (blocked)\";}s:15:\"status_canceled\";a:2:{s:4:\"body\";s:82:\"[user:name],\n\nYour account on [site:name] has been canceled.\n\n--  [site:name] team\";s:7:\"subject\";s:57:\"Account details for [user:name] at [site:name] (canceled)\";}s:8:\"langcode\";s:2:\"en\";}"
-))->execute();
+])->execute();
diff --git a/core/modules/user/tests/modules/user_hooks_test/user_hooks_test.module b/core/modules/user/tests/modules/user_hooks_test/user_hooks_test.module
index a036c65c6b0f0c6d3973203ff9a9568b12dbcf76..9baf8ab4d46aaf4d3ad0b2c113a6e431ed4797d0 100644
--- a/core/modules/user/tests/modules/user_hooks_test/user_hooks_test.module
+++ b/core/modules/user/tests/modules/user_hooks_test/user_hooks_test.module
@@ -13,7 +13,7 @@
 function user_hooks_test_user_format_name_alter(&$name, $account) {
   if (\Drupal::state()->get('user_hooks_test_user_format_name_alter', FALSE)) {
     if (\Drupal::state()->get('user_hooks_test_user_format_name_alter_safe', FALSE)) {
-      $name = SafeMarkup::format('<em>@uid</em>', array('@uid' => $account->id()));
+      $name = SafeMarkup::format('<em>@uid</em>', ['@uid' => $account->id()]);
     }
     else {
       $name = '<em>' . $account->id() . '</em>';
diff --git a/core/modules/user/tests/src/Functional/UserCacheTagsTest.php b/core/modules/user/tests/src/Functional/UserCacheTagsTest.php
index d4455ffa03294dfb9ecedbc956abcd6c7288d59c..a9e98575b7b593b6476a024ecc2cb878ba7a287f 100644
--- a/core/modules/user/tests/src/Functional/UserCacheTagsTest.php
+++ b/core/modules/user/tests/src/Functional/UserCacheTagsTest.php
@@ -17,7 +17,7 @@ class UserCacheTagsTest extends EntityWithUriCacheTagsTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('user');
+  public static $modules = ['user'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/user/tests/src/Functional/UserCreateFailMailTest.php b/core/modules/user/tests/src/Functional/UserCreateFailMailTest.php
index d844b0abdbd7c7e290a076507e6eff29aeaf02fa..38f2514a496f52f32d4d520aa3da72042681bf28 100644
--- a/core/modules/user/tests/src/Functional/UserCreateFailMailTest.php
+++ b/core/modules/user/tests/src/Functional/UserCreateFailMailTest.php
@@ -16,30 +16,30 @@ class UserCreateFailMailTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('system_mail_failure_test');
+  public static $modules = ['system_mail_failure_test'];
 
   /**
    * Tests the create user administration page.
    */
   public function testUserAdd() {
-    $user = $this->drupalCreateUser(array('administer users'));
+    $user = $this->drupalCreateUser(['administer users']);
     $this->drupalLogin($user);
 
     // Replace the mail functionality with a fake, malfunctioning service.
     $this->config('system.mail')->set('interface.default', 'test_php_mail_failure')->save();
     // Create a user, but fail to send an email.
     $name = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'name' => $name,
       'mail' => $this->randomMachineName() . '@example.com',
       'pass[pass1]' => $pass = $this->randomString(),
       'pass[pass2]' => $pass,
       'notify' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/people/create', $edit, t('Create new account'));
 
     $this->assertText(t('Unable to send email. Contact the site administrator if the problem persists.'));
-    $this->assertNoText(t('A welcome message with further instructions has been emailed to the new user @name.', array('@name' => $edit['name'])));
+    $this->assertNoText(t('A welcome message with further instructions has been emailed to the new user @name.', ['@name' => $edit['name']]));
   }
 
 }
diff --git a/core/modules/user/tests/src/Functional/UserDeleteTest.php b/core/modules/user/tests/src/Functional/UserDeleteTest.php
index c82a2f3fde82ede639f7b53de82af0494aae9fd6..abfb616208065076f3d58fa06ce1420c43e7d2c3 100644
--- a/core/modules/user/tests/src/Functional/UserDeleteTest.php
+++ b/core/modules/user/tests/src/Functional/UserDeleteTest.php
@@ -17,16 +17,16 @@ class UserDeleteTest extends BrowserTestBase {
    */
   function testUserDeleteMultiple() {
     // Create a few users with permissions, so roles will be created.
-    $user_a = $this->drupalCreateUser(array('access user profiles'));
-    $user_b = $this->drupalCreateUser(array('access user profiles'));
-    $user_c = $this->drupalCreateUser(array('access user profiles'));
+    $user_a = $this->drupalCreateUser(['access user profiles']);
+    $user_b = $this->drupalCreateUser(['access user profiles']);
+    $user_c = $this->drupalCreateUser(['access user profiles']);
 
-    $uids = array($user_a->id(), $user_b->id(), $user_c->id());
+    $uids = [$user_a->id(), $user_b->id(), $user_c->id()];
 
     // These users should have a role
     $query = db_select('user__roles', 'r');
     $roles_created = $query
-      ->fields('r', array('entity_id'))
+      ->fields('r', ['entity_id'])
       ->condition('entity_id', $uids, 'IN')
       ->countQuery()
       ->execute()
@@ -40,16 +40,16 @@ function testUserDeleteMultiple() {
     // Test if the roles assignments are deleted.
     $query = db_select('user__roles', 'r');
     $roles_after_deletion = $query
-      ->fields('r', array('entity_id'))
+      ->fields('r', ['entity_id'])
       ->condition('entity_id', $uids, 'IN')
       ->countQuery()
       ->execute()
       ->fetchField();
     $this->assertTrue($roles_after_deletion == 0, 'Role assignments deleted along with users');
     // Test if the users are deleted, User::load() will return NULL.
-    $this->assertNull(User::load($user_a->id()), format_string('User with id @uid deleted.', array('@uid' => $user_a->id())));
-    $this->assertNull(User::load($user_b->id()), format_string('User with id @uid deleted.', array('@uid' => $user_b->id())));
-    $this->assertNull(User::load($user_c->id()), format_string('User with id @uid deleted.', array('@uid' => $user_c->id())));
+    $this->assertNull(User::load($user_a->id()), format_string('User with id @uid deleted.', ['@uid' => $user_a->id()]));
+    $this->assertNull(User::load($user_b->id()), format_string('User with id @uid deleted.', ['@uid' => $user_b->id()]));
+    $this->assertNull(User::load($user_c->id()), format_string('User with id @uid deleted.', ['@uid' => $user_c->id()]));
   }
 
 }
diff --git a/core/modules/user/tests/src/Functional/UserEditedOwnAccountTest.php b/core/modules/user/tests/src/Functional/UserEditedOwnAccountTest.php
index 7783eb9046460552544d52270e4e977d2fade3ba..29e9a17b2a595434dcee19154d38d923a7115dc8 100644
--- a/core/modules/user/tests/src/Functional/UserEditedOwnAccountTest.php
+++ b/core/modules/user/tests/src/Functional/UserEditedOwnAccountTest.php
@@ -16,7 +16,7 @@ class UserEditedOwnAccountTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('user_form_test');
+  public static $modules = ['user_form_test'];
 
   function testUserEditedOwnAccount() {
     // Change account setting 'Who can register accounts?' to Administrators
@@ -24,11 +24,11 @@ function testUserEditedOwnAccount() {
     $this->config('user.settings')->set('register', USER_REGISTER_ADMINISTRATORS_ONLY)->save();
 
     // Create a new user account and log in.
-    $account = $this->drupalCreateUser(array('change own username'));
+    $account = $this->drupalCreateUser(['change own username']);
     $this->drupalLogin($account);
 
     // Change own username.
-    $edit = array();
+    $edit = [];
     $edit['name'] = $this->randomMachineName();
     $this->drupalPostForm('user/' . $account->id() . '/edit', $edit, t('Save'));
 
diff --git a/core/modules/user/tests/src/Functional/UserEntityCallbacksTest.php b/core/modules/user/tests/src/Functional/UserEntityCallbacksTest.php
index ceb8edaa64ff52de53209c2e7aa4ab529e6b4887..5b5a34e4a3f23d8300e42188e3df933fe729c7e0 100644
--- a/core/modules/user/tests/src/Functional/UserEntityCallbacksTest.php
+++ b/core/modules/user/tests/src/Functional/UserEntityCallbacksTest.php
@@ -18,7 +18,7 @@ class UserEntityCallbacksTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'user_hooks_test');
+  public static $modules = ['user', 'user_hooks_test'];
 
   /**
    * An authenticated user to use for testing.
diff --git a/core/modules/user/tests/src/Functional/UserLanguageTest.php b/core/modules/user/tests/src/Functional/UserLanguageTest.php
index e4aeb58ef2bc6e70a85bcadbdc156614ffdeba53..fcdceb8a3bec85a2cb375ee24296373e9140ac63 100644
--- a/core/modules/user/tests/src/Functional/UserLanguageTest.php
+++ b/core/modules/user/tests/src/Functional/UserLanguageTest.php
@@ -17,14 +17,14 @@ class UserLanguageTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'language');
+  public static $modules = ['user', 'language'];
 
   /**
    * Test if user can change their default language.
    */
   function testUserLanguageConfiguration() {
     // User to add and remove language.
-    $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
+    $admin_user = $this->drupalCreateUser(['administer languages', 'access administration pages']);
     // User to change their default language.
     $web_user = $this->drupalCreateUser();
 
@@ -34,12 +34,12 @@ function testUserLanguageConfiguration() {
     $langcode = 'xx';
     // The English name for the language.
     $name = $this->randomMachineName(16);
-    $edit = array(
+    $edit = [
       'predefined_langcode' => 'custom',
       'langcode' => $langcode,
       'label' => $name,
       'direction' => LanguageInterface::DIRECTION_LTR,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add custom language'));
     $this->drupalLogout();
 
@@ -52,9 +52,9 @@ function testUserLanguageConfiguration() {
     // Ensure custom language is present.
     $this->assertText($name, 'Language present on form.');
     // Switch to our custom language.
-    $edit = array(
+    $edit = [
       'preferred_langcode' => $langcode,
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Save'));
     // Ensure form was submitted successfully.
     $this->assertText(t('The changes have been saved.'), 'Changes were saved.');
diff --git a/core/modules/user/tests/src/Functional/UserMailNotifyTest.php b/core/modules/user/tests/src/Functional/UserMailNotifyTest.php
index 7f5257a56550924706e2665bab06b0d61fe323ad..57bebc042a48cdf12104a4ba32c238ccedf2bfe3 100644
--- a/core/modules/user/tests/src/Functional/UserMailNotifyTest.php
+++ b/core/modules/user/tests/src/Functional/UserMailNotifyTest.php
@@ -49,7 +49,7 @@ public function testUserMailsSent($op, array $mail_keys) {
     $return = _user_mail_notify($op, $this->createUser());
     $this->assertTrue($return, '_user_mail_notify() returns TRUE.');
     foreach ($mail_keys as $key) {
-      $filter = array('key' => $key);
+      $filter = ['key' => $key];
       $this->assertNotEmpty($this->getMails($filter), "Mails with $key exists.");
     }
     $this->assertCount(count($mail_keys), $this->getMails(), 'The expected number of emails sent.');
diff --git a/core/modules/user/tests/src/Functional/UserRolesAssignmentTest.php b/core/modules/user/tests/src/Functional/UserRolesAssignmentTest.php
index 1701b0f64de767c2697b73a75208c49da030658f..309dee2da1d2c2444721b8b21b8f18e2a4832ff5 100644
--- a/core/modules/user/tests/src/Functional/UserRolesAssignmentTest.php
+++ b/core/modules/user/tests/src/Functional/UserRolesAssignmentTest.php
@@ -13,7 +13,7 @@ class UserRolesAssignmentTest extends BrowserTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $admin_user = $this->drupalCreateUser(array('administer permissions', 'administer users'));
+    $admin_user = $this->drupalCreateUser(['administer permissions', 'administer users']);
     $this->drupalLogin($admin_user);
   }
 
@@ -22,17 +22,17 @@ protected function setUp() {
    * again.
    */
   function testAssignAndRemoveRole()  {
-    $rid = $this->drupalCreateRole(array('administer users'));
+    $rid = $this->drupalCreateRole(['administer users']);
     $account = $this->drupalCreateUser();
 
     // Assign the role to the user.
-    $this->drupalPostForm('user/' . $account->id() . '/edit', array("roles[$rid]" => $rid), t('Save'));
+    $this->drupalPostForm('user/' . $account->id() . '/edit', ["roles[$rid]" => $rid], t('Save'));
     $this->assertText(t('The changes have been saved.'));
     $this->assertFieldChecked('edit-roles-' . $rid, 'Role is assigned.');
     $this->userLoadAndCheckRoleAssigned($account, $rid);
 
     // Remove the role from the user.
-    $this->drupalPostForm('user/' . $account->id() . '/edit', array("roles[$rid]" => FALSE), t('Save'));
+    $this->drupalPostForm('user/' . $account->id() . '/edit', ["roles[$rid]" => FALSE], t('Save'));
     $this->assertText(t('The changes have been saved.'));
     $this->assertNoFieldChecked('edit-roles-' . $rid, 'Role is removed from user.');
     $this->userLoadAndCheckRoleAssigned($account, $rid, FALSE);
@@ -43,17 +43,17 @@ function testAssignAndRemoveRole()  {
    * be removed again.
    */
   function testCreateUserWithRole() {
-    $rid = $this->drupalCreateRole(array('administer users'));
+    $rid = $this->drupalCreateRole(['administer users']);
     // Create a new user and add the role at the same time.
-    $edit = array(
+    $edit = [
       'name' => $this->randomMachineName(),
       'mail' => $this->randomMachineName() . '@example.com',
       'pass[pass1]' => $pass = $this->randomString(),
       'pass[pass2]' => $pass,
       "roles[$rid]" => $rid,
-    );
+    ];
     $this->drupalPostForm('admin/people/create', $edit, t('Create new account'));
-    $this->assertText(t('Created a new user account for @name.', array('@name' => $edit['name'])));
+    $this->assertText(t('Created a new user account for @name.', ['@name' => $edit['name']]));
     // Get the newly added user.
     $account = user_load_by_name($edit['name']);
 
@@ -62,7 +62,7 @@ function testCreateUserWithRole() {
     $this->userLoadAndCheckRoleAssigned($account, $rid);
 
     // Remove the role again.
-    $this->drupalPostForm('user/' . $account->id() . '/edit', array("roles[$rid]" => FALSE), t('Save'));
+    $this->drupalPostForm('user/' . $account->id() . '/edit', ["roles[$rid]" => FALSE], t('Save'));
     $this->assertText(t('The changes have been saved.'));
     $this->assertNoFieldChecked('edit-roles-' . $rid, 'Role is removed from user.');
     $this->userLoadAndCheckRoleAssigned($account, $rid, FALSE);
@@ -81,7 +81,7 @@ function testCreateUserWithRole() {
    */
   private function userLoadAndCheckRoleAssigned($account, $rid, $is_assigned = TRUE) {
     $user_storage = $this->container->get('entity.manager')->getStorage('user');
-    $user_storage->resetCache(array($account->id()));
+    $user_storage->resetCache([$account->id()]);
     $account = $user_storage->load($account->id());
     if ($is_assigned) {
       $this->assertFalse(array_search($rid, $account->getRoles()) === FALSE, 'The role is present in the user object.');
diff --git a/core/modules/user/tests/src/Functional/UserSearchTest.php b/core/modules/user/tests/src/Functional/UserSearchTest.php
index af2fb28ba78df01d058f3ad5debf6b1e6dfd346f..7eafb4af8e90fbf1e7239c9431b5ff86ee6d5113 100644
--- a/core/modules/user/tests/src/Functional/UserSearchTest.php
+++ b/core/modules/user/tests/src/Functional/UserSearchTest.php
@@ -17,70 +17,70 @@ class UserSearchTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('search');
+  public static $modules = ['search'];
 
   function testUserSearch() {
     // Verify that a user without 'administer users' permission cannot search
     // for users by email address. Additionally, ensure that the username has a
     // plus sign to ensure searching works with that.
-    $user1 = $this->drupalCreateUser(array('access user profiles', 'search content'), "foo+bar");
+    $user1 = $this->drupalCreateUser(['access user profiles', 'search content'], "foo+bar");
     $this->drupalLogin($user1);
     $keys = $user1->getEmail();
-    $edit = array('keys' => $keys);
+    $edit = ['keys' => $keys];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText(t('Your search yielded no results.'), 'Search by email did not work for non-admin user');
     $this->assertText('no results', 'Search by email gave no-match message');
 
     // Verify that a non-matching query gives an appropriate message.
     $keys = 'nomatch';
-    $edit = array('keys' => $keys);
+    $edit = ['keys' => $keys];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText('no results', 'Non-matching search gave appropriate message');
 
     // Verify that a user with search permission can search for users by name.
     $keys = $user1->getUsername();
-    $edit = array('keys' => $keys);
+    $edit = ['keys' => $keys];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertLink($keys, 0, 'Search by username worked for non-admin user');
 
     // Verify that searching by sub-string works too.
     $subkey = substr($keys, 1, 5);
-    $edit = array('keys' => $subkey);
+    $edit = ['keys' => $subkey];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertLink($keys, 0, 'Search by username substring worked for non-admin user');
 
     // Verify that wildcard search works.
     $subkey = substr($keys, 0, 2) . '*' . substr($keys, 4, 2);
-    $edit = array('keys' => $subkey);
+    $edit = ['keys' => $subkey];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertLink($keys, 0, 'Search with wildcard worked for non-admin user');
 
     // Verify that a user with 'administer users' permission can search by
     // email.
-    $user2 = $this->drupalCreateUser(array('administer users', 'access user profiles', 'search content'));
+    $user2 = $this->drupalCreateUser(['administer users', 'access user profiles', 'search content']);
     $this->drupalLogin($user2);
     $keys = $user2->getEmail();
-    $edit = array('keys' => $keys);
+    $edit = ['keys' => $keys];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText($keys, 'Search by email works for administrative user');
     $this->assertText($user2->getUsername(), 'Search by email resulted in username on page for administrative user');
 
     // Verify that a substring works too for email.
     $subkey = substr($keys, 1, 5);
-    $edit = array('keys' => $subkey);
+    $edit = ['keys' => $subkey];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText($keys, 'Search by email substring works for administrative user');
     $this->assertText($user2->getUsername(), 'Search by email substring resulted in username on page for administrative user');
 
     // Verify that wildcard search works for email
     $subkey = substr($keys, 0, 2) . '*' . substr($keys, 4, 2);
-    $edit = array('keys' => $subkey);
+    $edit = ['keys' => $subkey];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText($user2->getUsername(), 'Search for email wildcard resulted in username on page for administrative user');
 
     // Verify that if they search by user name, they see email address too.
     $keys = $user1->getUsername();
-    $edit = array('keys' => $keys);
+    $edit = ['keys' => $keys];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText($keys, 'Search by username works for admin user');
     $this->assertText($user1->getEmail(), 'Search by username for admin shows email address too');
@@ -92,25 +92,25 @@ function testUserSearch() {
 
     // Verify that users with "administer users" permissions can see blocked
     // accounts in search results.
-    $edit = array('keys' => $blocked_user->getUsername());
+    $edit = ['keys' => $blocked_user->getUsername()];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText($blocked_user->getUsername(), 'Blocked users are listed on the user search results for users with the "administer users" permission.');
 
     // Verify that users without "administer users" permissions do not see
     // blocked accounts in search results.
     $this->drupalLogin($user1);
-    $edit = array('keys' => $blocked_user->getUsername());
+    $edit = ['keys' => $blocked_user->getUsername()];
     $this->drupalPostForm('search/user', $edit, t('Search'));
     $this->assertText(t('Your search yielded no results.'), 'Blocked users are hidden from the user search results.');
 
     // Create a user without search permission, and one without user page view
     // permission. Verify that neither one can access the user search page.
-    $user3 = $this->drupalCreateUser(array('search content'));
+    $user3 = $this->drupalCreateUser(['search content']);
     $this->drupalLogin($user3);
     $this->drupalGet('search/user');
     $this->assertResponse('403', 'User without user profile access cannot search');
 
-    $user4 = $this->drupalCreateUser(array('access user profiles'));
+    $user4 = $this->drupalCreateUser(['access user profiles']);
     $this->drupalLogin($user4);
     $this->drupalGet('search/user');
     $this->assertResponse('403', 'User without search permission cannot search');
diff --git a/core/modules/user/tests/src/Functional/UserTokenReplaceTest.php b/core/modules/user/tests/src/Functional/UserTokenReplaceTest.php
index 869339a161139bb119d37353ebee2ae04f30a4b7..d563d363411d5a006a14b6bb5ebbd534d5001fb9 100644
--- a/core/modules/user/tests/src/Functional/UserTokenReplaceTest.php
+++ b/core/modules/user/tests/src/Functional/UserTokenReplaceTest.php
@@ -21,7 +21,7 @@ class UserTokenReplaceTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'user_hooks_test');
+  public static $modules = ['language', 'user_hooks_test'];
 
   /**
    * {@inheritdoc}
@@ -37,17 +37,17 @@ protected function setUp() {
   function testUserTokenReplacement() {
     $token_service = \Drupal::token();
     $language_interface = \Drupal::languageManager()->getCurrentLanguage();
-    $url_options = array(
+    $url_options = [
       'absolute' => TRUE,
       'language' => $language_interface,
-    );
+    ];
 
     \Drupal::state()->set('user_hooks_test_user_format_name_alter', TRUE);
     \Drupal::state()->set('user_hooks_test_user_format_name_alter_safe', TRUE);
 
     // Create two users and log them in one after another.
-    $user1 = $this->drupalCreateUser(array());
-    $user2 = $this->drupalCreateUser(array());
+    $user1 = $this->drupalCreateUser([]);
+    $user2 = $this->drupalCreateUser([]);
     $this->drupalLogin($user1);
     $this->drupalLogout();
     $this->drupalLogin($user2);
@@ -56,7 +56,7 @@ function testUserTokenReplacement() {
     $global_account = User::load(\Drupal::currentUser()->id());
 
     // Generate and test tokens.
-    $tests = array();
+    $tests = [];
     $tests['[user:uid]'] = $account->id();
     $tests['[user:name]'] = $account->getAccountName();
     $tests['[user:account-name]'] = $account->getAccountName();
@@ -121,18 +121,18 @@ function testUserTokenReplacement() {
 
     foreach ($tests as $input => $expected) {
       $bubbleable_metadata = new BubbleableMetadata();
-      $output = $token_service->replace($input, array('user' => $anonymous_user), array('langcode' => $language_interface->getId()), $bubbleable_metadata);
-      $this->assertEqual($output, $expected, format_string('Sanitized user token %token replaced.', array('%token' => $input)));
+      $output = $token_service->replace($input, ['user' => $anonymous_user], ['langcode' => $language_interface->getId()], $bubbleable_metadata);
+      $this->assertEqual($output, $expected, format_string('Sanitized user token %token replaced.', ['%token' => $input]));
       $this->assertEqual($bubbleable_metadata, $metadata_tests[$input]);
     }
 
     // Generate login and cancel link.
-    $tests = array();
+    $tests = [];
     $tests['[user:one-time-login-url]'] = user_pass_reset_url($account);
     $tests['[user:cancel-url]'] = user_cancel_url($account);
 
     // Generate tokens with interface language.
-    $link = \Drupal::url('user.page', [], array('absolute' => TRUE));
+    $link = \Drupal::url('user.page', [], ['absolute' => TRUE]);
     foreach ($tests as $input => $expected) {
       $output = $token_service->replace($input, ['user' => $account], ['langcode' => $language_interface->getId(), 'callback' => 'user_mail_tokens', 'clear' => TRUE]);
       $this->assertTrue(strpos($output, $link) === 0, 'Generated URL is in interface language.');
@@ -141,16 +141,16 @@ function testUserTokenReplacement() {
     // Generate tokens with the user's preferred language.
     $account->preferred_langcode = 'de';
     $account->save();
-    $link = \Drupal::url('user.page', [], array('language' => \Drupal::languageManager()->getLanguage($account->getPreferredLangcode()), 'absolute' => TRUE));
+    $link = \Drupal::url('user.page', [], ['language' => \Drupal::languageManager()->getLanguage($account->getPreferredLangcode()), 'absolute' => TRUE]);
     foreach ($tests as $input => $expected) {
       $output = $token_service->replace($input, ['user' => $account], ['callback' => 'user_mail_tokens', 'clear' => TRUE]);
       $this->assertTrue(strpos($output, $link) === 0, "Generated URL is in the user's preferred language.");
     }
 
     // Generate tokens with one specific language.
-    $link = \Drupal::url('user.page', [], array('language' => \Drupal::languageManager()->getLanguage('de'), 'absolute' => TRUE));
+    $link = \Drupal::url('user.page', [], ['language' => \Drupal::languageManager()->getLanguage('de'), 'absolute' => TRUE]);
     foreach ($tests as $input => $expected) {
-      foreach (array($user1, $user2) as $account) {
+      foreach ([$user1, $user2] as $account) {
         $output = $token_service->replace($input, ['user' => $account], ['langcode' => 'de', 'callback' => 'user_mail_tokens', 'clear' => TRUE]);
         $this->assertTrue(strpos($output, $link) === 0, "Generated URL in the requested language.");
       }
diff --git a/core/modules/user/tests/src/Kernel/Condition/UserRoleConditionTest.php b/core/modules/user/tests/src/Kernel/Condition/UserRoleConditionTest.php
index 6e553646e332a3b1dd1fc29e80fa823c62a751a0..075b04c5e0e2fcf3ba1c2a2f98279d3d10e68f32 100644
--- a/core/modules/user/tests/src/Kernel/Condition/UserRoleConditionTest.php
+++ b/core/modules/user/tests/src/Kernel/Condition/UserRoleConditionTest.php
@@ -48,7 +48,7 @@ class UserRoleConditionTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field');
+  public static $modules = ['system', 'user', 'field'];
 
   /**
    * {@inheritdoc}
@@ -62,38 +62,38 @@ protected function setUp() {
     $this->manager = $this->container->get('plugin.manager.condition');
 
     // Set up the authenticated and anonymous roles.
-    Role::create(array(
+    Role::create([
       'id' => RoleInterface::ANONYMOUS_ID,
       'label' => 'Anonymous user',
-    ))->save();
-    Role::create(array(
+    ])->save();
+    Role::create([
       'id' => RoleInterface::AUTHENTICATED_ID,
       'label' => 'Authenticated user',
-    ))->save();
+    ])->save();
 
     // Create new role.
     $rid = strtolower($this->randomMachineName(8));
     $label = $this->randomString(8);
-    $role = Role::create(array(
+    $role = Role::create([
       'id' => $rid,
       'label' => $label,
-    ));
+    ]);
     $role->save();
     $this->role = $role;
 
     // Setup an anonymous user for our tests.
-    $this->anonymous = User::create(array(
+    $this->anonymous = User::create([
       'name' => '',
       'uid' => 0,
-    ));
+    ]);
     $this->anonymous->save();
     // Loading the anonymous user adds the correct role.
     $this->anonymous = User::load($this->anonymous->id());
 
     // Setup an authenticated user for our tests.
-    $this->authenticated = User::create(array(
+    $this->authenticated = User::create([
       'name' => $this->randomMachineName(),
-    ));
+    ]);
     $this->authenticated->save();
     // Add the custom role.
     $this->authenticated->addRole($this->role->id());
@@ -107,7 +107,7 @@ public function testConditions() {
     // authenticated user roles.
     /** @var $condition \Drupal\Core\Condition\ConditionInterface */
     $condition = $this->manager->createInstance('user_role')
-      ->setConfig('roles', array(RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID))
+      ->setConfig('roles', [RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID])
       ->setContextValue('user', $this->anonymous);
     $this->assertFalse($condition->execute(), 'Anonymous users fail role checks for authenticated.');
     // Check for the proper summary.
@@ -115,13 +115,13 @@ public function testConditions() {
     $this->assertEqual($condition->summary(), 'The user is a member of Authenticated user');
 
     // Set the user role to anonymous.
-    $condition->setConfig('roles', array(RoleInterface::ANONYMOUS_ID => RoleInterface::ANONYMOUS_ID));
+    $condition->setConfig('roles', [RoleInterface::ANONYMOUS_ID => RoleInterface::ANONYMOUS_ID]);
     $this->assertTrue($condition->execute(), 'Anonymous users pass role checks for anonymous.');
     // Check for the proper summary.
     $this->assertEqual($condition->summary(), 'The user is a member of Anonymous user');
 
     // Set the user role to check anonymous or authenticated.
-    $condition->setConfig('roles', array(RoleInterface::ANONYMOUS_ID => RoleInterface::ANONYMOUS_ID, RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID));
+    $condition->setConfig('roles', [RoleInterface::ANONYMOUS_ID => RoleInterface::ANONYMOUS_ID, RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID]);
     $this->assertTrue($condition->execute(), 'Anonymous users pass role checks for anonymous or authenticated.');
     // Check for the proper summary.
     $this->assertEqual($condition->summary(), 'The user is a member of Anonymous user, Authenticated user');
@@ -132,11 +132,11 @@ public function testConditions() {
     $this->assertTrue($condition->execute(), 'Authenticated users pass role checks for anonymous or authenticated.');
 
     // Set the role to just authenticated and recheck.
-    $condition->setConfig('roles', array(RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID));
+    $condition->setConfig('roles', [RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID]);
     $this->assertTrue($condition->execute(), 'Authenticated users pass role checks for authenticated.');
 
     // Test Constructor injection.
-    $condition = $this->manager->createInstance('user_role', array('roles' => array(RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID), 'context' => array('user' => $this->authenticated)));
+    $condition = $this->manager->createInstance('user_role', ['roles' => [RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID], 'context' => ['user' => $this->authenticated]]);
     $this->assertTrue($condition->execute(), 'Constructor injection of context and configuration working as anticipated.');
 
     // Check the negated summary.
@@ -144,14 +144,14 @@ public function testConditions() {
     $this->assertEqual($condition->summary(), 'The user is not a member of Authenticated user');
 
     // Check the complex negated summary.
-    $condition->setConfig('roles', array(RoleInterface::ANONYMOUS_ID => RoleInterface::ANONYMOUS_ID, RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID));
+    $condition->setConfig('roles', [RoleInterface::ANONYMOUS_ID => RoleInterface::ANONYMOUS_ID, RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID]);
     $this->assertEqual($condition->summary(), 'The user is not a member of Anonymous user, Authenticated user');
 
     // Check a custom role.
-    $condition->setConfig('roles', array($this->role->id() => $this->role->id()));
+    $condition->setConfig('roles', [$this->role->id() => $this->role->id()]);
     $condition->setConfig('negate', FALSE);
     $this->assertTrue($condition->execute(), 'Authenticated user is a member of the custom role.');
-    $this->assertEqual($condition->summary(), SafeMarkup::format('The user is a member of @roles', array('@roles' => $this->role->label())));
+    $this->assertEqual($condition->summary(), SafeMarkup::format('The user is a member of @roles', ['@roles' => $this->role->label()]));
   }
 
 }
diff --git a/core/modules/user/tests/src/Kernel/Migrate/MigrateUserProfileFieldTest.php b/core/modules/user/tests/src/Kernel/Migrate/MigrateUserProfileFieldTest.php
index 0f64c79a55403bdc49810269c3e165f47066dce5..75bccf14beb830e76690f003af94423b4244412d 100644
--- a/core/modules/user/tests/src/Kernel/Migrate/MigrateUserProfileFieldTest.php
+++ b/core/modules/user/tests/src/Kernel/Migrate/MigrateUserProfileFieldTest.php
@@ -41,7 +41,7 @@ public function testUserProfileFields() {
     $field_storage = FieldStorageConfig::load('user.profile_sold_to');
     $this->assertIdentical('list_string', $field_storage->getType(), 'Field type is list_string.');
     $settings = $field_storage->getSettings();
-    $this->assertEqual($settings['allowed_values'], array(
+    $this->assertEqual($settings['allowed_values'], [
       'Pill spammers' => 'Pill spammers',
       'Fitness spammers' => 'Fitness spammers',
       'Back\slash' => 'Back\slash',
@@ -49,7 +49,7 @@ public function testUserProfileFields() {
       'Dot.in.the.middle' => 'Dot.in.the.middle',
       'Faithful servant' => 'Faithful servant',
       'Anonymous donor' => 'Anonymous donor',
-    ));
+    ]);
     $this->assertIdentical('list_string', $field_storage->getType(), 'Field type is list_string.');
 
     // Migrated list field.
diff --git a/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserPictureFileTest.php b/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserPictureFileTest.php
index b3b6a64230422c85ef1add824f6ec6aad06360c0..1d28e2a7dc1c83f9d019f9a823359637b6b4aaa9 100644
--- a/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserPictureFileTest.php
+++ b/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserPictureFileTest.php
@@ -29,7 +29,7 @@ protected function setUp() {
    * Tests the Drupal 6 user pictures to Drupal 8 migration.
    */
   public function testUserPictures() {
-    $file_ids = array();
+    $file_ids = [];
     foreach ($this->migration->getIdMap() as $destination_ids) {
       $file_ids[] = reset($destination_ids);
     }
diff --git a/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserTest.php b/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserTest.php
index 33952d177a9a5db5e35f3059186e431e70294045..ed287770ae7e03f83551f44aaa1a6b8b100c438e 100644
--- a/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserTest.php
+++ b/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserTest.php
@@ -37,7 +37,7 @@ protected function setUp() {
     // Make sure uid 1 is created.
     user_install();
 
-    $file = File::create(array(
+    $file = File::create([
       'fid' => 2,
       'uid' => 2,
       'filename' => 'image-test.jpg',
@@ -46,12 +46,12 @@ protected function setUp() {
       'created' => 1,
       'changed' => 1,
       'status' => FILE_STATUS_PERMANENT,
-    ));
+    ]);
     $file->enforceIsNew();
     file_put_contents($file->getFileUri(), file_get_contents('core/modules/simpletest/files/image-1.png'));
     $file->save();
 
-    $file = File::create(array(
+    $file = File::create([
       'fid' => 8,
       'uid' => 8,
       'filename' => 'image-test.png',
@@ -60,7 +60,7 @@ protected function setUp() {
       'created' => 1,
       'changed' => 1,
       'status' => FILE_STATUS_PERMANENT,
-    ));
+    ]);
     $file->enforceIsNew();
     file_put_contents($file->getFileUri(), file_get_contents('core/modules/simpletest/files/image-2.jpg'));
     $file->save();
@@ -84,14 +84,14 @@ public function testUser() {
       // Get roles directly from the source.
       $rids = Database::getConnection('default', 'migrate')
         ->select('users_roles', 'ur')
-        ->fields('ur', array('rid'))
+        ->fields('ur', ['rid'])
         ->condition('ur.uid', $source->uid)
         ->execute()
         ->fetchCol();
-      $roles = array(RoleInterface::AUTHENTICATED_ID);
+      $roles = [RoleInterface::AUTHENTICATED_ID];
       $id_map = $this->getMigration('d6_user_role')->getIdMap();
       foreach ($rids as $rid) {
-        $role = $id_map->lookupDestinationId(array($rid));
+        $role = $id_map->lookupDestinationId([$rid]);
         $roles[] = reset($role);
       }
 
diff --git a/core/modules/user/tests/src/Kernel/Migrate/d7/MigrateUserTest.php b/core/modules/user/tests/src/Kernel/Migrate/d7/MigrateUserTest.php
index d18d0711b1ef51aa99ef33bc57d16fe580f24a08..7d73dafecd1bfde5d0a42fd908d704d49573a1e5 100644
--- a/core/modules/user/tests/src/Kernel/Migrate/d7/MigrateUserTest.php
+++ b/core/modules/user/tests/src/Kernel/Migrate/d7/MigrateUserTest.php
@@ -177,20 +177,20 @@ public function testUser() {
     foreach ($users as $source) {
       $rids = Database::getConnection('default', 'migrate')
         ->select('users_roles', 'ur')
-        ->fields('ur', array('rid'))
+        ->fields('ur', ['rid'])
         ->condition('ur.uid', $source->uid)
         ->execute()
         ->fetchCol();
-      $roles = array(RoleInterface::AUTHENTICATED_ID);
+      $roles = [RoleInterface::AUTHENTICATED_ID];
       $id_map = $this->getMigration('d7_user_role')->getIdMap();
       foreach ($rids as $rid) {
-        $role = $id_map->lookupDestinationId(array($rid));
+        $role = $id_map->lookupDestinationId([$rid]);
         $roles[] = reset($role);
       }
 
       $field_integer = Database::getConnection('default', 'migrate')
         ->select('field_data_field_integer', 'fi')
-        ->fields('fi', array('field_integer_value'))
+        ->fields('fi', ['field_integer_value'])
         ->condition('fi.entity_id', $source->uid)
         ->execute()
         ->fetchCol();
diff --git a/core/modules/user/tests/src/Kernel/TempStoreDatabaseTest.php b/core/modules/user/tests/src/Kernel/TempStoreDatabaseTest.php
index 254524a9712eed6859854201daf4238233aa764a..b3d7ff1e1a1b3065d80681b3ef3a244416a2c7d6 100644
--- a/core/modules/user/tests/src/Kernel/TempStoreDatabaseTest.php
+++ b/core/modules/user/tests/src/Kernel/TempStoreDatabaseTest.php
@@ -21,7 +21,7 @@ class TempStoreDatabaseTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user');
+  public static $modules = ['system', 'user'];
 
   /**
    * A key/value store factory.
@@ -42,21 +42,21 @@ class TempStoreDatabaseTest extends KernelTestBase {
    *
    * @var array
    */
-  protected $users = array();
+  protected $users = [];
 
   /**
    * An array of random stdClass objects.
    *
    * @var array
    */
-  protected $objects = array();
+  protected $objects = [];
 
   protected function setUp() {
     parent::setUp();
 
     // Install system tables to test the key/value storage without installing a
     // full Drupal environment.
-    $this->installSchema('system', array('key_value_expire'));
+    $this->installSchema('system', ['key_value_expire']);
 
     // Create several objects for testing.
     for ($i = 0; $i <= 3; $i++) {
@@ -135,7 +135,7 @@ public function testUserTempStore() {
     // Now manually expire the item (this is not exposed by the API) and then
     // assert it is no longer accessible.
     db_update('key_value_expire')
-      ->fields(array('expire' => REQUEST_TIME - 1))
+      ->fields(['expire' => REQUEST_TIME - 1])
       ->condition('collection', "user.shared_tempstore.$collection")
       ->condition('name', $key)
       ->execute();
diff --git a/core/modules/user/tests/src/Kernel/UserAccountFormFieldsTest.php b/core/modules/user/tests/src/Kernel/UserAccountFormFieldsTest.php
index 402297254171ae6c6ffba96167209306e96b6290..e4367a051555e7744a865515690d8eb18edc7dbc 100644
--- a/core/modules/user/tests/src/Kernel/UserAccountFormFieldsTest.php
+++ b/core/modules/user/tests/src/Kernel/UserAccountFormFieldsTest.php
@@ -18,7 +18,7 @@ class UserAccountFormFieldsTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field');
+  public static $modules = ['system', 'user', 'field'];
 
   /**
    * Tests the root user account form section in the "Configure site" form.
@@ -37,7 +37,7 @@ function testInstallConfigureForm() {
 
     // Verify that web browsers may autocomplete the email value and
     // autofill/prefill the name and pass values.
-    foreach (array('mail', 'name', 'pass') as $key) {
+    foreach (['mail', 'name', 'pass'] as $key) {
       $this->assertFalse(isset($form['account'][$key]['#attributes']['autocomplete']), "'$key' field: 'autocomplete' attribute not found.");
     }
   }
@@ -47,7 +47,7 @@ function testInstallConfigureForm() {
    */
   function testUserRegistrationForm() {
     // Install default configuration; required for AccountFormController.
-    $this->installConfig(array('user'));
+    $this->installConfig(['user']);
 
     // Disable email confirmation to unlock the password field.
     $this->config('user.settings')
@@ -61,7 +61,7 @@ function testUserRegistrationForm() {
 
     // Verify that web browsers may autocomplete the email value and
     // autofill/prefill the name and pass values.
-    foreach (array('mail', 'name', 'pass') as $key) {
+    foreach (['mail', 'name', 'pass'] as $key) {
       $this->assertFalse(isset($form['account'][$key]['#attributes']['autocomplete']), "'$key' field: 'autocomplete' attribute not found.");
     }
   }
@@ -71,7 +71,7 @@ function testUserRegistrationForm() {
    */
   function testUserEditForm() {
     // Install default configuration; required for AccountFormController.
-    $this->installConfig(array('user'));
+    $this->installConfig(['user']);
 
     // Install the router table and then rebuild.
     \Drupal::service('router.builder')->rebuild();
@@ -82,7 +82,7 @@ function testUserEditForm() {
     $this->assertFieldOrder($form['account']);
 
     // Verify that autocomplete is off on all account fields.
-    foreach (array('mail', 'name', 'pass') as $key) {
+    foreach (['mail', 'name', 'pass'] as $key) {
       $this->assertIdentical($form['account'][$key]['#attributes']['autocomplete'], 'off', "'$key' field: 'autocomplete' attribute is 'off'.");
     }
   }
@@ -128,7 +128,7 @@ protected function assertFieldOrder(array $elements) {
   protected function buildAccountForm($operation) {
     // @see HtmlEntityFormController::getFormObject()
     $entity_type = 'user';
-    $fields = array();
+    $fields = [];
     if ($operation != 'register') {
       $fields['uid'] = 2;
     }
diff --git a/core/modules/user/tests/src/Kernel/UserActionConfigSchemaTest.php b/core/modules/user/tests/src/Kernel/UserActionConfigSchemaTest.php
index bde5861e3dc5a8c02bcf302e948e57cb5ad5a84f..c405ad97aec672ccb3e0e43162e8b9fe9e2eaf76 100644
--- a/core/modules/user/tests/src/Kernel/UserActionConfigSchemaTest.php
+++ b/core/modules/user/tests/src/Kernel/UserActionConfigSchemaTest.php
@@ -21,14 +21,14 @@ class UserActionConfigSchemaTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user');
+  public static $modules = ['system', 'user'];
 
   /**
    * Tests whether the user action config schema are valid.
    */
   function testValidUserActionConfigSchema() {
     $rid = strtolower($this->randomMachineName(8));
-    Role::create(array('id' => $rid))->save();
+    Role::create(['id' => $rid])->save();
 
     // Test user_add_role_action configuration.
     $config = $this->config('system.action.user_add_role_action.' . $rid);
diff --git a/core/modules/user/tests/src/Kernel/UserEntityReferenceTest.php b/core/modules/user/tests/src/Kernel/UserEntityReferenceTest.php
index 8958c542a4e0f346bbc376fa4e0bfcbd2d577a6c..14dc7ada24282aeb494f42f95352b443d4006e6e 100644
--- a/core/modules/user/tests/src/Kernel/UserEntityReferenceTest.php
+++ b/core/modules/user/tests/src/Kernel/UserEntityReferenceTest.php
@@ -36,16 +36,16 @@ class UserEntityReferenceTest extends EntityKernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->role1 = Role::create(array(
+    $this->role1 = Role::create([
       'id' => strtolower($this->randomMachineName(8)),
       'label' => $this->randomMachineName(8),
-    ));
+    ]);
     $this->role1->save();
 
-    $this->role2 = Role::create(array(
+    $this->role2 = Role::create([
       'id' => strtolower($this->randomMachineName(8)),
       'label' => $this->randomMachineName(8),
-    ));
+    ]);
     $this->role2->save();
 
     $this->createEntityReferenceField('user', 'user', 'user_reference', 'User reference', 'user');
@@ -57,23 +57,23 @@ protected function setUp() {
   function testUserSelectionByRole() {
     $field_definition = FieldConfig::loadByName('user', 'user', 'user_reference');
     $handler_settings = $field_definition->getSetting('handler_settings');
-    $handler_settings['filter']['role'] = array(
+    $handler_settings['filter']['role'] = [
       $this->role1->id() => $this->role1->id(),
       $this->role2->id() => 0,
-    );
+    ];
     $handler_settings['filter']['type'] = 'role';
     $field_definition->setSetting('handler_settings', $handler_settings);
     $field_definition->save();
 
-    $user1 = $this->createUser(array('name' => 'aabb'));
+    $user1 = $this->createUser(['name' => 'aabb']);
     $user1->addRole($this->role1->id());
     $user1->save();
 
-    $user2 = $this->createUser(array('name' => 'aabbb'));
+    $user2 = $this->createUser(['name' => 'aabbb']);
     $user2->addRole($this->role1->id());
     $user2->save();
 
-    $user3 = $this->createUser(array('name' => 'aabbbb'));
+    $user3 = $this->createUser(['name' => 'aabbbb']);
     $user3->addRole($this->role2->id());
     $user3->save();
 
@@ -83,7 +83,7 @@ function testUserSelectionByRole() {
 
     $matches = $autocomplete->getMatches('user', 'default', $field_definition->getSetting('handler_settings'), 'aabb');
     $this->assertEqual(count($matches), 2);
-    $users = array();
+    $users = [];
     foreach ($matches as $match) {
       $users[] = $match['label'];
     }
diff --git a/core/modules/user/tests/src/Kernel/UserEntityTest.php b/core/modules/user/tests/src/Kernel/UserEntityTest.php
index 9002e5ca37934e1b9e583bc9c9ea9a267112954c..1c501f049e705ba24eb25e985e1368c84cef4d5a 100644
--- a/core/modules/user/tests/src/Kernel/UserEntityTest.php
+++ b/core/modules/user/tests/src/Kernel/UserEntityTest.php
@@ -19,7 +19,7 @@ class UserEntityTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field');
+  public static $modules = ['system', 'user', 'field'];
 
   /**
    * Tests some of the methods.
@@ -30,39 +30,39 @@ class UserEntityTest extends KernelTestBase {
    */
   public function testUserMethods() {
     $role_storage = $this->container->get('entity.manager')->getStorage('user_role');
-    $role_storage->create(array('id' => 'test_role_one'))->save();
-    $role_storage->create(array('id' => 'test_role_two'))->save();
-    $role_storage->create(array('id' => 'test_role_three'))->save();
+    $role_storage->create(['id' => 'test_role_one'])->save();
+    $role_storage->create(['id' => 'test_role_two'])->save();
+    $role_storage->create(['id' => 'test_role_three'])->save();
 
-    $values = array(
+    $values = [
       'uid' => 1,
-      'roles' => array('test_role_one'),
-    );
+      'roles' => ['test_role_one'],
+    ];
     $user = User::create($values);
 
     $this->assertTrue($user->hasRole('test_role_one'));
     $this->assertFalse($user->hasRole('test_role_two'));
-    $this->assertEqual(array(RoleInterface::AUTHENTICATED_ID, 'test_role_one'), $user->getRoles());
+    $this->assertEqual([RoleInterface::AUTHENTICATED_ID, 'test_role_one'], $user->getRoles());
 
     $user->addRole('test_role_one');
     $this->assertTrue($user->hasRole('test_role_one'));
     $this->assertFalse($user->hasRole('test_role_two'));
-    $this->assertEqual(array(RoleInterface::AUTHENTICATED_ID, 'test_role_one'), $user->getRoles());
+    $this->assertEqual([RoleInterface::AUTHENTICATED_ID, 'test_role_one'], $user->getRoles());
 
     $user->addRole('test_role_two');
     $this->assertTrue($user->hasRole('test_role_one'));
     $this->assertTrue($user->hasRole('test_role_two'));
-    $this->assertEqual(array(RoleInterface::AUTHENTICATED_ID, 'test_role_one', 'test_role_two'), $user->getRoles());
+    $this->assertEqual([RoleInterface::AUTHENTICATED_ID, 'test_role_one', 'test_role_two'], $user->getRoles());
 
     $user->removeRole('test_role_three');
     $this->assertTrue($user->hasRole('test_role_one'));
     $this->assertTrue($user->hasRole('test_role_two'));
-    $this->assertEqual(array(RoleInterface::AUTHENTICATED_ID, 'test_role_one', 'test_role_two'), $user->getRoles());
+    $this->assertEqual([RoleInterface::AUTHENTICATED_ID, 'test_role_one', 'test_role_two'], $user->getRoles());
 
     $user->removeRole('test_role_one');
     $this->assertFalse($user->hasRole('test_role_one'));
     $this->assertTrue($user->hasRole('test_role_two'));
-    $this->assertEqual(array(RoleInterface::AUTHENTICATED_ID, 'test_role_two'), $user->getRoles());
+    $this->assertEqual([RoleInterface::AUTHENTICATED_ID, 'test_role_two'], $user->getRoles());
   }
 
 }
diff --git a/core/modules/user/tests/src/Kernel/UserFieldsTest.php b/core/modules/user/tests/src/Kernel/UserFieldsTest.php
index f0fb5322f5d481cc1aa467789f05dd21a3eec5b2..18f8f3b365a7394da060cec90c4141eb55fbf6be 100644
--- a/core/modules/user/tests/src/Kernel/UserFieldsTest.php
+++ b/core/modules/user/tests/src/Kernel/UserFieldsTest.php
@@ -27,7 +27,7 @@ protected function setUp() {
     $this->installEntitySchema('user');
 
     // Set up a test theme that prints the user's mail field.
-    \Drupal::service('theme_handler')->install(array('user_test_theme'));
+    \Drupal::service('theme_handler')->install(['user_test_theme']);
     \Drupal::theme()->setActiveTheme(\Drupal::service('theme.initialization')->initTheme('user_test_theme'));
     // Clear the theme registry.
     $this->container->set('theme.registry', NULL);
diff --git a/core/modules/user/tests/src/Kernel/UserInstallTest.php b/core/modules/user/tests/src/Kernel/UserInstallTest.php
index 2bbcd5fcd4a78390a9c937e0fd629f3aef986731..f61811be79ff13bf46aa7eeb0b7be086ed126b9e 100644
--- a/core/modules/user/tests/src/Kernel/UserInstallTest.php
+++ b/core/modules/user/tests/src/Kernel/UserInstallTest.php
@@ -16,7 +16,7 @@ class UserInstallTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user');
+  public static $modules = ['user'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/user/tests/src/Kernel/UserRoleDeleteTest.php b/core/modules/user/tests/src/Kernel/UserRoleDeleteTest.php
index 1aefbcfcece09dadc55513feb77fc2d4e852cada..cac470aaab84a5f5b530bfed6b44bce73da4fed1 100644
--- a/core/modules/user/tests/src/Kernel/UserRoleDeleteTest.php
+++ b/core/modules/user/tests/src/Kernel/UserRoleDeleteTest.php
@@ -17,7 +17,7 @@ class UserRoleDeleteTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field');
+  public static $modules = ['system', 'user', 'field'];
 
   protected function setUp() {
     parent::setUp();
@@ -32,15 +32,15 @@ protected function setUp() {
   public function testRoleDeleteUserRoleReferenceDelete() {
     // Create two test roles.
     $role_storage = $this->container->get('entity.manager')->getStorage('user_role');
-    $role_storage->create(array('id' => 'test_role_one'))->save();
-    $role_storage->create(array('id' => 'test_role_two'))->save();
+    $role_storage->create(['id' => 'test_role_one'])->save();
+    $role_storage->create(['id' => 'test_role_two'])->save();
 
     // Create user and assign both test roles.
-    $values = array(
+    $values = [
       'uid' => 1,
       'name' => $this->randomString(),
-      'roles' => array('test_role_one', 'test_role_two'),
-    );
+      'roles' => ['test_role_one', 'test_role_two'],
+    ];
     $user = User::create($values);
     $user->save();
 
@@ -60,7 +60,7 @@ public function testRoleDeleteUserRoleReferenceDelete() {
     $this->assertTrue($user->hasRole('test_role_two'));
 
     // Create new role with same name.
-    $role_storage->create(array('id' => 'test_role_one'))->save();
+    $role_storage->create(['id' => 'test_role_one'])->save();
 
     // Load user again from the database.
     $user = User::load($user->id());
diff --git a/core/modules/user/tests/src/Kernel/UserSaveStatusTest.php b/core/modules/user/tests/src/Kernel/UserSaveStatusTest.php
index 00a29fcd606346df06a6e6e181cbd05c714542f7..0ad1bde38cb92113057cc4c1ae529b0f12a01fb4 100644
--- a/core/modules/user/tests/src/Kernel/UserSaveStatusTest.php
+++ b/core/modules/user/tests/src/Kernel/UserSaveStatusTest.php
@@ -17,7 +17,7 @@ class UserSaveStatusTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field');
+  public static $modules = ['system', 'user', 'field'];
 
   protected function setUp() {
     parent::setUp();
@@ -29,10 +29,10 @@ protected function setUp() {
    */
   function testUserSaveStatus() {
     // Create a new user.
-    $values = array(
+    $values = [
       'uid' => 1,
       'name' => $this->randomMachineName(),
-    );
+    ];
     $user = User::create($values);
 
     // Test SAVED_NEW.
diff --git a/core/modules/user/tests/src/Kernel/UserValidationTest.php b/core/modules/user/tests/src/Kernel/UserValidationTest.php
index b27b00f747e590e99ed57e6adff4979efb44b7c8..9be1fd0d627f593a8f011c52b72a8d2435252d31 100644
--- a/core/modules/user/tests/src/Kernel/UserValidationTest.php
+++ b/core/modules/user/tests/src/Kernel/UserValidationTest.php
@@ -21,7 +21,7 @@ class UserValidationTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field', 'user', 'system');
+  public static $modules = ['field', 'user', 'system'];
 
   /**
    * {@inheritdoc}
@@ -29,10 +29,10 @@ class UserValidationTest extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
     $this->installEntitySchema('user');
-    $this->installSchema('system', array('sequences'));
+    $this->installSchema('system', ['sequences']);
 
     // Make sure that the default roles exist.
-    $this->installConfig(array('user'));
+    $this->installConfig(['user']);
 
   }
 
@@ -40,25 +40,25 @@ protected function setUp() {
    * Tests user name validation.
    */
   function testUsernames() {
-    $test_cases = array( // '<username>' => array('<description>', 'assert<testName>'),
-      'foo'                    => array('Valid username', 'assertNull'),
-      'FOO'                    => array('Valid username', 'assertNull'),
-      'Foo O\'Bar'             => array('Valid username', 'assertNull'),
-      'foo@bar'                => array('Valid username', 'assertNull'),
-      'foo@example.com'        => array('Valid username', 'assertNull'),
-      'foo@-example.com'       => array('Valid username', 'assertNull'), // invalid domains are allowed in usernames
-      'þòøÇߪř€'               => array('Valid username', 'assertNull'),
-      'foo+bar'                => array('Valid username', 'assertNull'), // '+' symbol is allowed
-      'ᚠᛇᚻ᛫ᛒᛦᚦ'                => array('Valid UTF8 username', 'assertNull'), // runes
-      ' foo'                   => array('Invalid username that starts with a space', 'assertNotNull'),
-      'foo '                   => array('Invalid username that ends with a space', 'assertNotNull'),
-      'foo  bar'               => array('Invalid username that contains 2 spaces \'&nbsp;&nbsp;\'', 'assertNotNull'),
-      ''                       => array('Invalid empty username', 'assertNotNull'),
-      'foo/'                   => array('Invalid username containing invalid chars', 'assertNotNull'),
-      'foo' . chr(0) . 'bar'   => array('Invalid username containing chr(0)', 'assertNotNull'), // NULL
-      'foo' . chr(13) . 'bar'  => array('Invalid username containing chr(13)', 'assertNotNull'), // CR
-      str_repeat('x', USERNAME_MAX_LENGTH + 1) => array('Invalid excessively long username', 'assertNotNull'),
-    );
+    $test_cases = [ // '<username>' => array('<description>', 'assert<testName>'),
+      'foo'                    => ['Valid username', 'assertNull'],
+      'FOO'                    => ['Valid username', 'assertNull'],
+      'Foo O\'Bar'             => ['Valid username', 'assertNull'],
+      'foo@bar'                => ['Valid username', 'assertNull'],
+      'foo@example.com'        => ['Valid username', 'assertNull'],
+      'foo@-example.com'       => ['Valid username', 'assertNull'], // invalid domains are allowed in usernames
+      'þòøÇߪř€'               => ['Valid username', 'assertNull'],
+      'foo+bar'                => ['Valid username', 'assertNull'], // '+' symbol is allowed
+      'ᚠᛇᚻ᛫ᛒᛦᚦ'                => ['Valid UTF8 username', 'assertNull'], // runes
+      ' foo'                   => ['Invalid username that starts with a space', 'assertNotNull'],
+      'foo '                   => ['Invalid username that ends with a space', 'assertNotNull'],
+      'foo  bar'               => ['Invalid username that contains 2 spaces \'&nbsp;&nbsp;\'', 'assertNotNull'],
+      ''                       => ['Invalid empty username', 'assertNotNull'],
+      'foo/'                   => ['Invalid username containing invalid chars', 'assertNotNull'],
+      'foo' . chr(0) . 'bar'   => ['Invalid username containing chr(0)', 'assertNotNull'], // NULL
+      'foo' . chr(13) . 'bar'  => ['Invalid username containing chr(13)', 'assertNotNull'], // CR
+      str_repeat('x', USERNAME_MAX_LENGTH + 1) => ['Invalid excessively long username', 'assertNotNull'],
+    ];
     foreach ($test_cases as $name => $test_case) {
       list($description, $test) = $test_case;
       $result = user_validate_name($name);
@@ -70,10 +70,10 @@ function testUsernames() {
    * Runs entity validation checks.
    */
   function testValidation() {
-    $user = User::create(array(
+    $user = User::create([
       'name' => 'test',
       'mail' => 'test@example.com',
-    ));
+    ]);
     $violations = $user->validate();
     $this->assertEqual(count($violations), 0, 'No violations when validating a default user.');
 
@@ -84,7 +84,7 @@ function testValidation() {
     $violations = $user->validate();
     $this->assertEqual(count($violations), 1, 'Violation found when name is too long.');
     $this->assertEqual($violations[0]->getPropertyPath(), 'name');
-    $this->assertEqual($violations[0]->getMessage(), t('The username %name is too long: it must be %max characters or less.', array('%name' => $name, '%max' => 60)));
+    $this->assertEqual($violations[0]->getMessage(), t('The username %name is too long: it must be %max characters or less.', ['%name' => $name, '%max' => 60]));
 
     // Create a second test user to provoke a name collision.
     $user2 = User::create([
@@ -96,7 +96,7 @@ function testValidation() {
     $violations = $user->validate();
     $this->assertEqual(count($violations), 1, 'Violation found on name collision.');
     $this->assertEqual($violations[0]->getPropertyPath(), 'name');
-    $this->assertEqual($violations[0]->getMessage(), t('The username %name is already taken.', array('%name' => 'existing')));
+    $this->assertEqual($violations[0]->getMessage(), t('The username %name is already taken.', ['%name' => 'existing']));
 
     // Make the name valid.
     $user->set('name', $this->randomMachineName());
@@ -116,7 +116,7 @@ function testValidation() {
     //   https://www.drupal.org/node/2023465.
     $this->assertEqual(count($violations), 2, 'Violations found when email is too long');
     $this->assertEqual($violations[0]->getPropertyPath(), 'mail.0.value');
-    $this->assertEqual($violations[0]->getMessage(), t('%name: the email address can not be longer than @max characters.', array('%name' => $user->get('mail')->getFieldDefinition()->getLabel(), '@max' => Email::EMAIL_MAX_LENGTH)));
+    $this->assertEqual($violations[0]->getMessage(), t('%name: the email address can not be longer than @max characters.', ['%name' => $user->get('mail')->getFieldDefinition()->getLabel(), '@max' => Email::EMAIL_MAX_LENGTH]));
     $this->assertEqual($violations[1]->getPropertyPath(), 'mail.0.value');
     $this->assertEqual($violations[1]->getMessage(), t('This value is not a valid email address.'));
 
@@ -125,12 +125,12 @@ function testValidation() {
     $violations = $user->validate();
     $this->assertEqual(count($violations), 1, 'Violation found when email already exists.');
     $this->assertEqual($violations[0]->getPropertyPath(), 'mail');
-    $this->assertEqual($violations[0]->getMessage(), t('The email address %mail is already taken.', array('%mail' => 'existing@example.com')));
+    $this->assertEqual($violations[0]->getMessage(), t('The email address %mail is already taken.', ['%mail' => 'existing@example.com']));
     $user->set('mail', NULL);
     $violations = $user->validate();
     $this->assertEqual(count($violations), 1, 'Email addresses may not be removed');
     $this->assertEqual($violations[0]->getPropertyPath(), 'mail');
-    $this->assertEqual($violations[0]->getMessage(), t('@name field is required.', array('@name' => $user->getFieldDefinition('mail')->getLabel())));
+    $this->assertEqual($violations[0]->getMessage(), t('@name field is required.', ['@name' => $user->getFieldDefinition('mail')->getLabel()]));
     $user->set('mail', 'someone@example.com');
 
     $user->set('timezone', $this->randomString(33));
@@ -157,14 +157,14 @@ function testValidation() {
     $this->assertAllowedValuesViolation($user, 'preferred_admin_langcode');
     $user->set('preferred_admin_langcode', NULL);
 
-    Role::create(array('id' => 'role1'))->save();
-    Role::create(array('id' => 'role2'))->save();
+    Role::create(['id' => 'role1'])->save();
+    Role::create(['id' => 'role2'])->save();
 
     // Test cardinality of user roles.
     $user = User::create([
       'name' => 'role_test',
       'mail' => 'test@example.com',
-      'roles' => array('role1', 'role2'),
+      'roles' => ['role1', 'role2'],
     ]);
     $violations = $user->validate();
     $this->assertEqual(count($violations), 0);
@@ -173,7 +173,7 @@ function testValidation() {
     $violations = $user->validate();
     $this->assertEqual(count($violations), 1);
     $this->assertEqual($violations[0]->getPropertyPath(), 'roles.1.target_id');
-    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%entity_type: %name) does not exist.', array('%entity_type' => 'user_role', '%name' => 'unknown_role')));
+    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%entity_type: %name) does not exist.', ['%entity_type' => 'user_role', '%name' => 'unknown_role']));
   }
 
   /**
@@ -195,7 +195,7 @@ protected function assertLengthViolation(EntityInterface $entity, $field_name, $
     $this->assertEqual(count($violations), $count, "Violation found when $field_name is too long.");
     $this->assertEqual($violations[$expected_index]->getPropertyPath(), "$field_name.0.value");
     $field_label = $entity->get($field_name)->getFieldDefinition()->getLabel();
-    $this->assertEqual($violations[$expected_index]->getMessage(), t('%name: may not be longer than @max characters.', array('%name' => $field_label, '@max' => $length)));
+    $this->assertEqual($violations[$expected_index]->getMessage(), t('%name: may not be longer than @max characters.', ['%name' => $field_label, '@max' => $length]));
   }
 
   /**
diff --git a/core/modules/user/tests/src/Kernel/Views/HandlerFieldPermissionTest.php b/core/modules/user/tests/src/Kernel/Views/HandlerFieldPermissionTest.php
index c0c791fe5d18a8798ab3a8e6379fd5d5d50ae6fb..0d212218414378f0051cb2ad74e2a3e89c6fdfde 100644
--- a/core/modules/user/tests/src/Kernel/Views/HandlerFieldPermissionTest.php
+++ b/core/modules/user/tests/src/Kernel/Views/HandlerFieldPermissionTest.php
@@ -17,7 +17,7 @@ class HandlerFieldPermissionTest extends UserKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_field_permission');
+  public static $testViews = ['test_field_permission'];
 
   /**
    * Tests the permission field handler output.
@@ -31,9 +31,9 @@ public function testFieldPermission() {
     $view->render();
     $style_plugin = $view->style_plugin;
 
-    $expected_permissions = array();
-    $expected_permissions[$this->users[0]->id()] = array();
-    $expected_permissions[$this->users[1]->id()] = array();
+    $expected_permissions = [];
+    $expected_permissions[$this->users[0]->id()] = [];
+    $expected_permissions[$this->users[1]->id()] = [];
     $expected_permissions[$this->users[2]->id()][] = t('Administer permissions');
     // View user profiles comes first, because we sort by the permission
     // machine name.
diff --git a/core/modules/user/tests/src/Kernel/Views/HandlerFilterPermissionTest.php b/core/modules/user/tests/src/Kernel/Views/HandlerFilterPermissionTest.php
index 069a9239d1a2287ca65efdb018155c6a2ce55283..b005f62adaabfbac668823d8a6cfd7db8b0e9005 100644
--- a/core/modules/user/tests/src/Kernel/Views/HandlerFilterPermissionTest.php
+++ b/core/modules/user/tests/src/Kernel/Views/HandlerFilterPermissionTest.php
@@ -18,7 +18,7 @@ class HandlerFilterPermissionTest extends UserKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_filter_permission');
+  public static $testViews = ['test_filter_permission'];
 
   protected $columnMap;
 
@@ -31,64 +31,64 @@ class HandlerFilterPermissionTest extends UserKernelTestBase {
   public function testFilterPermission() {
     $this->setupPermissionTestData();
 
-    $column_map = array('uid' => 'uid');
+    $column_map = ['uid' => 'uid'];
     $view = Views::getView('test_filter_permission');
 
     // Filter by a non existing permission.
     $view->initHandlers();
-    $view->filter['permission']->value = array('non_existent_permission');
+    $view->filter['permission']->value = ['non_existent_permission'];
     $this->executeView($view);
     $this->assertEqual(count($view->result), 4, 'A non existent permission is not filtered so everything is the result.');
-    $expected[] = array('uid' => 1);
-    $expected[] = array('uid' => 2);
-    $expected[] = array('uid' => 3);
-    $expected[] = array('uid' => 4);
+    $expected[] = ['uid' => 1];
+    $expected[] = ['uid' => 2];
+    $expected[] = ['uid' => 3];
+    $expected[] = ['uid' => 4];
     $this->assertIdenticalResultset($view, $expected, $column_map);
     $view->destroy();
 
     // Filter by a permission.
     $view->initHandlers();
-    $view->filter['permission']->value = array('administer permissions');
+    $view->filter['permission']->value = ['administer permissions'];
     $this->executeView($view);
     $this->assertEqual(count($view->result), 2);
-    $expected = array();
-    $expected[] = array('uid' => 3);
-    $expected[] = array('uid' => 4);
+    $expected = [];
+    $expected[] = ['uid' => 3];
+    $expected[] = ['uid' => 4];
     $this->assertIdenticalResultset($view, $expected, $column_map);
     $view->destroy();
 
     // Filter by not a permission.
     $view->initHandlers();
     $view->filter['permission']->operator = 'not';
-    $view->filter['permission']->value = array('administer users');
+    $view->filter['permission']->value = ['administer users'];
     $this->executeView($view);
     $this->assertEqual(count($view->result), 3);
-    $expected = array();
-    $expected[] = array('uid' => 1);
-    $expected[] = array('uid' => 2);
-    $expected[] = array('uid' => 3);
+    $expected = [];
+    $expected[] = ['uid' => 1];
+    $expected[] = ['uid' => 2];
+    $expected[] = ['uid' => 3];
     $this->assertIdenticalResultset($view, $expected, $column_map);
     $view->destroy();
 
     // Filter by not multiple permissions, that are present in multiple roles.
     $view->initHandlers();
     $view->filter['permission']->operator = 'not';
-    $view->filter['permission']->value = array('administer users', 'administer permissions');
+    $view->filter['permission']->value = ['administer users', 'administer permissions'];
     $this->executeView($view);
     $this->assertEqual(count($view->result), 2);
-    $expected = array();
-    $expected[] = array('uid' => 1);
-    $expected[] = array('uid' => 2);
+    $expected = [];
+    $expected[] = ['uid' => 1];
+    $expected[] = ['uid' => 2];
     $this->assertIdenticalResultset($view, $expected, $column_map);
     $view->destroy();
 
     // Filter by another permission of a role with multiple permissions.
     $view->initHandlers();
-    $view->filter['permission']->value = array('administer users');
+    $view->filter['permission']->value = ['administer users'];
     $this->executeView($view);
     $this->assertEqual(count($view->result), 1);
-    $expected = array();
-    $expected[] = array('uid' => 4);
+    $expected = [];
+    $expected[] = ['uid' => 4];
     $this->assertIdenticalResultset($view, $expected, $column_map);
     $view->destroy();
 
@@ -103,7 +103,7 @@ public function testFilterPermission() {
     foreach ($permissions as $name => $permission) {
       $permission_by_module[$permission['provider']][$name] = $permission;
     }
-    foreach (array('system' => 'System', 'user' => 'User') as $module => $title) {
+    foreach (['system' => 'System', 'user' => 'User'] as $module => $title) {
       $expected = array_map(function ($permission) {
         return Html::escape(strip_tags($permission['title']));
       }, $permission_by_module[$module]);
diff --git a/core/modules/user/tests/src/Kernel/Views/HandlerFilterRolesTest.php b/core/modules/user/tests/src/Kernel/Views/HandlerFilterRolesTest.php
index 37d0f2cdc2e86779a30083ebcaaf3d08ed2320fd..306e813323f67d35943cfd0af123bbcd3f76309c 100644
--- a/core/modules/user/tests/src/Kernel/Views/HandlerFilterRolesTest.php
+++ b/core/modules/user/tests/src/Kernel/Views/HandlerFilterRolesTest.php
@@ -20,7 +20,7 @@ class HandlerFilterRolesTest extends UserKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_user_name');
+  public static $testViews = ['test_user_name'];
 
   /**
    * Tests that role filter dependencies are calculated correctly.
diff --git a/core/modules/user/tests/src/Kernel/Views/UserKernelTestBase.php b/core/modules/user/tests/src/Kernel/Views/UserKernelTestBase.php
index 075315c50edb3138ec64f822ca33d940245beb2b..0e862c86b89730d1920b40d1473e09edac640618 100644
--- a/core/modules/user/tests/src/Kernel/Views/UserKernelTestBase.php
+++ b/core/modules/user/tests/src/Kernel/Views/UserKernelTestBase.php
@@ -15,14 +15,14 @@ abstract class UserKernelTestBase extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user_test_views', 'user', 'system', 'field');
+  public static $modules = ['user_test_views', 'user', 'system', 'field'];
 
   /**
    * Users to use during this test.
    *
    * @var array
    */
-  protected $users = array();
+  protected $users = [];
 
   /**
    * The entity storage for roles.
@@ -41,7 +41,7 @@ abstract class UserKernelTestBase extends ViewsKernelTestBase {
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('user_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['user_test_views']);
 
     $this->installEntitySchema('user');
 
@@ -55,33 +55,33 @@ protected function setUp($import_test_views = TRUE) {
    */
   protected function setupPermissionTestData() {
     // Setup a role without any permission.
-    $this->roleStorage->create(array('id' => 'authenticated'))
+    $this->roleStorage->create(['id' => 'authenticated'])
       ->save();
-    $this->roleStorage->create(array('id' => 'no_permission'))
+    $this->roleStorage->create(['id' => 'no_permission'])
       ->save();
     // Setup a role with just one permission.
-    $this->roleStorage->create(array('id' => 'one_permission'))
+    $this->roleStorage->create(['id' => 'one_permission'])
       ->save();
-    user_role_grant_permissions('one_permission', array('administer permissions'));
+    user_role_grant_permissions('one_permission', ['administer permissions']);
     // Setup a role with multiple permissions.
-    $this->roleStorage->create(array('id' => 'multiple_permissions'))
+    $this->roleStorage->create(['id' => 'multiple_permissions'])
       ->save();
-    user_role_grant_permissions('multiple_permissions', array('administer permissions', 'administer users', 'access user profiles'));
+    user_role_grant_permissions('multiple_permissions', ['administer permissions', 'administer users', 'access user profiles']);
 
     // Setup a user without an extra role.
     $this->users[] = $account = $this->userStorage->create(['name' => $this->randomString()]);
     $account->save();
     // Setup a user with just the first role (so no permission beside the
     // ones from the authenticated role).
-    $this->users[] = $account = $this->userStorage->create(array('name' => 'first_role'));
+    $this->users[] = $account = $this->userStorage->create(['name' => 'first_role']);
     $account->addRole('no_permission');
     $account->save();
     // Setup a user with just the second role (so one additional permission).
-    $this->users[] = $account = $this->userStorage->create(array('name' => 'second_role'));
+    $this->users[] = $account = $this->userStorage->create(['name' => 'second_role']);
     $account->addRole('one_permission');
     $account->save();
     // Setup a user with both the second and the third role.
-    $this->users[] = $account = $this->userStorage->create(array('name' => 'second_third_role'));
+    $this->users[] = $account = $this->userStorage->create(['name' => 'second_third_role']);
     $account->addRole('one_permission');
     $account->addRole('multiple_permissions');
     $account->save();
diff --git a/core/modules/user/tests/src/Unit/Menu/UserLocalTasksTest.php b/core/modules/user/tests/src/Unit/Menu/UserLocalTasksTest.php
index 97e9f33f38f288333e5ce1679ab49cd8122fd3e8..106e09142c17eb3bc9bf9b99281e8510b1ed7b47 100644
--- a/core/modules/user/tests/src/Unit/Menu/UserLocalTasksTest.php
+++ b/core/modules/user/tests/src/Unit/Menu/UserLocalTasksTest.php
@@ -12,7 +12,7 @@
 class UserLocalTasksTest extends LocalTaskIntegrationTestBase {
 
   protected function setUp() {
-    $this->directoryList = array('user' => 'core/modules/user');
+    $this->directoryList = ['user' => 'core/modules/user'];
     parent::setUp();
   }
 
@@ -29,12 +29,12 @@ public function testUserAdminLocalTasks($route, $expected) {
    * Provides a list of routes to test.
    */
   public function getUserAdminRoutes() {
-    return array(
-      array('entity.user.collection', array(array('entity.user.collection', 'user.admin_permissions', 'entity.user_role.collection'))),
-      array('user.admin_permissions', array(array('entity.user.collection', 'user.admin_permissions', 'entity.user_role.collection'))),
-      array('entity.user_role.collection', array(array('entity.user.collection', 'user.admin_permissions', 'entity.user_role.collection'))),
-      array('entity.user.admin_form', array(array('user.account_settings_tab'))),
-    );
+    return [
+      ['entity.user.collection', [['entity.user.collection', 'user.admin_permissions', 'entity.user_role.collection']]],
+      ['user.admin_permissions', [['entity.user.collection', 'user.admin_permissions', 'entity.user_role.collection']]],
+      ['entity.user_role.collection', [['entity.user.collection', 'user.admin_permissions', 'entity.user_role.collection']]],
+      ['entity.user.admin_form', [['user.account_settings_tab']]],
+    ];
   }
 
   /**
@@ -43,9 +43,9 @@ public function getUserAdminRoutes() {
    * @dataProvider getUserLoginRoutes
    */
   public function testUserLoginLocalTasks($route) {
-    $tasks = array(
-      0 => array('user.register', 'user.pass', 'user.login',),
-    );
+    $tasks = [
+      0 => ['user.register', 'user.pass', 'user.login',],
+    ];
     $this->assertLocalTasks($route, $tasks);
   }
 
@@ -53,11 +53,11 @@ public function testUserLoginLocalTasks($route) {
    * Provides a list of routes to test.
    */
   public function getUserLoginRoutes() {
-    return array(
-      array('user.login'),
-      array('user.register'),
-      array('user.pass'),
-    );
+    return [
+      ['user.login'],
+      ['user.register'],
+      ['user.pass'],
+    ];
   }
 
   /**
@@ -65,10 +65,10 @@ public function getUserLoginRoutes() {
    *
    * @dataProvider getUserPageRoutes
    */
-  public function testUserPageLocalTasks($route, $subtask = array()) {
-    $tasks = array(
-      0 => array('entity.user.canonical', 'entity.user.edit_form',),
-    );
+  public function testUserPageLocalTasks($route, $subtask = []) {
+    $tasks = [
+      0 => ['entity.user.canonical', 'entity.user.edit_form',],
+    ];
     if ($subtask) $tasks[] = $subtask;
     $this->assertLocalTasks($route, $tasks);
   }
@@ -77,10 +77,10 @@ public function testUserPageLocalTasks($route, $subtask = array()) {
    * Provides a list of routes to test.
    */
   public function getUserPageRoutes() {
-    return array(
-      array('entity.user.canonical'),
-      array('entity.user.edit_form'),
-    );
+    return [
+      ['entity.user.canonical'],
+      ['entity.user.edit_form'],
+    ];
   }
 
 }
diff --git a/core/modules/user/tests/src/Unit/PermissionHandlerTest.php b/core/modules/user/tests/src/Unit/PermissionHandlerTest.php
index b0b91da89f153cae26ea208450be5e21cd2ce116..2918d2f61eae539d7aafd7f72433b04b9801510f 100644
--- a/core/modules/user/tests/src/Unit/PermissionHandlerTest.php
+++ b/core/modules/user/tests/src/Unit/PermissionHandlerTest.php
@@ -97,11 +97,11 @@ public function testBuildPermissionsYaml() {
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $this->moduleHandler->expects($this->once())
       ->method('getModuleDirectories')
-      ->willReturn(array(
+      ->willReturn([
         'module_a' => vfsStream::url('modules/module_a'),
         'module_b' => vfsStream::url('modules/module_b'),
         'module_c' => vfsStream::url('modules/module_c'),
-      ));
+      ]);
 
     $url = vfsStream::url('modules');
     mkdir($url . '/module_a');
@@ -124,16 +124,16 @@ public function testBuildPermissionsYaml() {
   'restrict access': TRUE
 EOF
     );
-    $modules = array('module_a', 'module_b', 'module_c');
-    $extensions = array(
+    $modules = ['module_a', 'module_b', 'module_c'];
+    $extensions = [
       'module_a' => $this->mockModuleExtension('module_a', 'Module a'),
       'module_b' => $this->mockModuleExtension('module_b', 'Module b'),
       'module_c' => $this->mockModuleExtension('module_c', 'Module c'),
-    );
+    ];
     $this->moduleHandler->expects($this->any())
       ->method('getImplementations')
       ->with('permission')
-      ->willReturn(array());
+      ->willReturn([]);
 
     $this->moduleHandler->expects($this->any())
       ->method('getModuleList')
@@ -227,11 +227,11 @@ public function testBuildPermissionsYamlCallback() {
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $this->moduleHandler->expects($this->once())
       ->method('getModuleDirectories')
-      ->willReturn(array(
+      ->willReturn([
         'module_a' => vfsStream::url('modules/module_a'),
         'module_b' => vfsStream::url('modules/module_b'),
         'module_c' => vfsStream::url('modules/module_c'),
-      ));
+      ]);
 
     $url = vfsStream::url('modules');
     mkdir($url . '/module_a');
@@ -254,17 +254,17 @@ public function testBuildPermissionsYamlCallback() {
 EOF
     );
 
-    $modules = array('module_a', 'module_b', 'module_c');
-    $extensions = array(
+    $modules = ['module_a', 'module_b', 'module_c'];
+    $extensions = [
       'module_a' => $this->mockModuleExtension('module_a', 'Module a'),
       'module_b' => $this->mockModuleExtension('module_b', 'Module b'),
       'module_c' => $this->mockModuleExtension('module_c', 'Module c'),
-    );
+    ];
 
     $this->moduleHandler->expects($this->any())
       ->method('getImplementations')
       ->with('permission')
-      ->willReturn(array());
+      ->willReturn([]);
 
     $this->moduleHandler->expects($this->any())
       ->method('getModuleList')
@@ -273,19 +273,19 @@ public function testBuildPermissionsYamlCallback() {
     $this->controllerResolver->expects($this->at(0))
       ->method('getControllerFromDefinition')
       ->with('Drupal\\user\\Tests\\TestPermissionCallbacks::singleDescription')
-      ->willReturn(array(new TestPermissionCallbacks(), 'singleDescription'));
+      ->willReturn([new TestPermissionCallbacks(), 'singleDescription']);
     $this->controllerResolver->expects($this->at(1))
       ->method('getControllerFromDefinition')
       ->with('Drupal\\user\\Tests\\TestPermissionCallbacks::titleDescription')
-      ->willReturn(array(new TestPermissionCallbacks(), 'titleDescription'));
+      ->willReturn([new TestPermissionCallbacks(), 'titleDescription']);
     $this->controllerResolver->expects($this->at(2))
       ->method('getControllerFromDefinition')
       ->with('Drupal\\user\\Tests\\TestPermissionCallbacks::titleProvider')
-      ->willReturn(array(new TestPermissionCallbacks(), 'titleProvider'));
+      ->willReturn([new TestPermissionCallbacks(), 'titleProvider']);
     $this->controllerResolver->expects($this->at(3))
       ->method('getControllerFromDefinition')
       ->with('Drupal\\user\\Tests\\TestPermissionCallbacks::titleDescriptionRestrictAccess')
-      ->willReturn(array(new TestPermissionCallbacks(), 'titleDescriptionRestrictAccess'));
+      ->willReturn([new TestPermissionCallbacks(), 'titleDescriptionRestrictAccess']);
 
     $this->permissionHandler = new TestPermissionHandler($this->moduleHandler, $this->stringTranslation, $this->controllerResolver);
 
@@ -307,9 +307,9 @@ public function testPermissionsYamlStaticAndCallback() {
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $this->moduleHandler->expects($this->once())
       ->method('getModuleDirectories')
-      ->willReturn(array(
+      ->willReturn([
         'module_a' => vfsStream::url('modules/module_a'),
-      ));
+      ]);
 
     $url = vfsStream::url('modules');
     mkdir($url . '/module_a');
@@ -322,15 +322,15 @@ public function testPermissionsYamlStaticAndCallback() {
 EOF
     );
 
-    $modules = array('module_a');
-    $extensions = array(
+    $modules = ['module_a'];
+    $extensions = [
       'module_a' => $this->mockModuleExtension('module_a', 'Module a'),
-    );
+    ];
 
     $this->moduleHandler->expects($this->any())
       ->method('getImplementations')
       ->with('permission')
-      ->willReturn(array());
+      ->willReturn([]);
 
     $this->moduleHandler->expects($this->any())
       ->method('getModuleList')
@@ -339,7 +339,7 @@ public function testPermissionsYamlStaticAndCallback() {
     $this->controllerResolver->expects($this->once())
       ->method('getControllerFromDefinition')
       ->with('Drupal\\user\\Tests\\TestPermissionCallbacks::titleDescription')
-      ->willReturn(array(new TestPermissionCallbacks(), 'titleDescription'));
+      ->willReturn([new TestPermissionCallbacks(), 'titleDescription']);
 
     $this->permissionHandler = new TestPermissionHandler($this->moduleHandler, $this->stringTranslation, $this->controllerResolver);
 
@@ -399,37 +399,37 @@ public function setSystemRebuildModuleData(array $extensions) {
 class TestPermissionCallbacks {
 
   public function singleDescription() {
-    return array(
+    return [
       'access_module_a' => 'single_description'
-    );
+    ];
   }
 
   public function titleDescription() {
-    return array(
-      'access module b' => array(
+    return [
+      'access module b' => [
         'title' => 'Access B',
         'description' => 'bla bla',
-      ),
-    );
+      ],
+    ];
   }
 
   public function titleDescriptionRestrictAccess() {
-    return array(
-      'access_module_c' => array(
+    return [
+      'access_module_c' => [
         'title' => 'Access C',
         'description' => 'bla bla',
         'restrict access' => TRUE,
-      ),
-    );
+      ],
+    ];
   }
 
   public function titleProvider() {
-    return array(
-      'access module a via module b' => array(
+    return [
+      'access module a via module b' => [
         'title' => 'Access A via B',
         'provider' => 'module_a',
-      ),
-    );
+      ],
+    ];
   }
 
 }
@@ -442,7 +442,7 @@ class TestTranslationManager implements TranslationInterface {
   /**
    * {@inheritdoc}
    */
-  public function translate($string, array $args = array(), array $options = array()) {
+  public function translate($string, array $args = [], array $options = []) {
     return new TranslatableMarkup($string, $args, $options, $this);
   }
 
@@ -456,7 +456,7 @@ public function translateString(TranslatableMarkup $translated_string) {
   /**
    * {@inheritdoc}
    */
-  public function formatPlural($count, $singular, $plural, array $args = array(), array $options = array()) {
+  public function formatPlural($count, $singular, $plural, array $args = [], array $options = []) {
     return new PluralTranslatableMarkup($count, $singular, $plural, $args, $options, $this);
   }
 
diff --git a/core/modules/user/tests/src/Unit/Plugin/Action/AddRoleUserTest.php b/core/modules/user/tests/src/Unit/Plugin/Action/AddRoleUserTest.php
index 0763b256502233fcb004225461aca76e892e0e09..5ca694b84efdb5e0330014aad6a42df81b2ca207 100644
--- a/core/modules/user/tests/src/Unit/Plugin/Action/AddRoleUserTest.php
+++ b/core/modules/user/tests/src/Unit/Plugin/Action/AddRoleUserTest.php
@@ -22,8 +22,8 @@ public function testExecuteAddExistingRole() {
       ->with($this->equalTo('test_role_1'))
       ->will($this->returnValue(TRUE));
 
-    $config = array('rid' => 'test_role_1');
-    $remove_role_plugin = new AddRoleUser($config, 'user_add_role_action', array('type' => 'user'), $this->userRoleEntityType);
+    $config = ['rid' => 'test_role_1'];
+    $remove_role_plugin = new AddRoleUser($config, 'user_add_role_action', ['type' => 'user'], $this->userRoleEntityType);
 
     $remove_role_plugin->execute($this->account);
   }
@@ -40,8 +40,8 @@ public function testExecuteAddNonExistingRole() {
       ->with($this->equalTo('test_role_1'))
       ->will($this->returnValue(FALSE));
 
-    $config = array('rid' => 'test_role_1');
-    $remove_role_plugin = new AddRoleUser($config, 'user_remove_role_action', array('type' => 'user'), $this->userRoleEntityType);
+    $config = ['rid' => 'test_role_1'];
+    $remove_role_plugin = new AddRoleUser($config, 'user_remove_role_action', ['type' => 'user'], $this->userRoleEntityType);
 
     $remove_role_plugin->execute($this->account);
   }
diff --git a/core/modules/user/tests/src/Unit/Plugin/Action/RemoveRoleUserTest.php b/core/modules/user/tests/src/Unit/Plugin/Action/RemoveRoleUserTest.php
index 1c6fa25be84b5a706ce9139dac6f1ccd432c7eba..878b4baad243f2b5ea7018fd57a096252e4446e9 100644
--- a/core/modules/user/tests/src/Unit/Plugin/Action/RemoveRoleUserTest.php
+++ b/core/modules/user/tests/src/Unit/Plugin/Action/RemoveRoleUserTest.php
@@ -22,8 +22,8 @@ public function testExecuteRemoveExistingRole() {
       ->with($this->equalTo('test_role_1'))
       ->will($this->returnValue(TRUE));
 
-    $config = array('rid' => 'test_role_1');
-    $remove_role_plugin = new RemoveRoleUser($config, 'user_remove_role_action', array('type' => 'user'), $this->userRoleEntityType);
+    $config = ['rid' => 'test_role_1'];
+    $remove_role_plugin = new RemoveRoleUser($config, 'user_remove_role_action', ['type' => 'user'], $this->userRoleEntityType);
 
     $remove_role_plugin->execute($this->account);
   }
@@ -40,8 +40,8 @@ public function testExecuteRemoveNonExistingRole() {
       ->with($this->equalTo('test_role_1'))
       ->will($this->returnValue(FALSE));
 
-    $config = array('rid' => 'test_role_1');
-    $remove_role_plugin = new RemoveRoleUser($config, 'user_remove_role_action', array('type' => 'user'), $this->userRoleEntityType);
+    $config = ['rid' => 'test_role_1'];
+    $remove_role_plugin = new RemoveRoleUser($config, 'user_remove_role_action', ['type' => 'user'], $this->userRoleEntityType);
 
     $remove_role_plugin->execute($this->account);
   }
diff --git a/core/modules/user/tests/src/Unit/Plugin/Core/Entity/UserTest.php b/core/modules/user/tests/src/Unit/Plugin/Core/Entity/UserTest.php
index 86ce8e9ac71871edf8faa84a1d8fa4b4d460058b..623203ee74db4d0d997a6b9d618153389a696632 100644
--- a/core/modules/user/tests/src/Unit/Plugin/Core/Entity/UserTest.php
+++ b/core/modules/user/tests/src/Unit/Plugin/Core/Entity/UserTest.php
@@ -14,20 +14,20 @@ class UserTest extends UserSessionTest {
   /**
    * {@inheritdoc}
    */
-  protected function createUserSession(array $rids = array(), $authenticated = FALSE) {
+  protected function createUserSession(array $rids = [], $authenticated = FALSE) {
     $user = $this->getMockBuilder('Drupal\user\Entity\User')
       ->disableOriginalConstructor()
-      ->setMethods(array('get', 'id'))
+      ->setMethods(['get', 'id'])
       ->getMock();
     $user->expects($this->any())
       ->method('id')
       // @todo Also test the uid = 1 handling.
       ->will($this->returnValue($authenticated ? 2 : 0));
-    $roles = array();
+    $roles = [];
     foreach ($rids as $rid) {
-      $roles[] = (object) array(
+      $roles[] = (object) [
         'target_id' => $rid,
-      );
+      ];
     }
     $user->expects($this->any())
       ->method('get')
@@ -44,14 +44,14 @@ protected function createUserSession(array $rids = array(), $authenticated = FAL
    */
   public function testUserGetRoles() {
     // Anonymous user.
-    $user = $this->createUserSession(array());
-    $this->assertEquals(array(RoleInterface::ANONYMOUS_ID), $user->getRoles());
-    $this->assertEquals(array(), $user->getRoles(TRUE));
+    $user = $this->createUserSession([]);
+    $this->assertEquals([RoleInterface::ANONYMOUS_ID], $user->getRoles());
+    $this->assertEquals([], $user->getRoles(TRUE));
 
     // Authenticated user.
-    $user = $this->createUserSession(array(), TRUE);
-    $this->assertEquals(array(RoleInterface::AUTHENTICATED_ID), $user->getRoles());
-    $this->assertEquals(array(), $user->getRoles(TRUE));
+    $user = $this->createUserSession([], TRUE);
+    $this->assertEquals([RoleInterface::AUTHENTICATED_ID], $user->getRoles());
+    $this->assertEquals([], $user->getRoles(TRUE));
   }
 
 }
diff --git a/core/modules/user/tests/src/Unit/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidatorTest.php b/core/modules/user/tests/src/Unit/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidatorTest.php
index 69edf3b4d6ae098d939bec05de97924686c6eb0e..805c96ec2c2969d8d910f228274d9dff912549d8 100644
--- a/core/modules/user/tests/src/Unit/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidatorTest.php
+++ b/core/modules/user/tests/src/Unit/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidatorTest.php
@@ -53,7 +53,7 @@ public function testValidate($items, $expected_violation, $name = FALSE) {
     if ($expected_violation) {
       $context->expects($this->once())
         ->method('addViolation')
-        ->with($constraint->message, array('%name' => $name));
+        ->with($constraint->message, ['%name' => $name]);
     }
     else {
       $context->expects($this->never())
diff --git a/core/modules/user/tests/src/Unit/Plugin/views/field/UserBulkFormTest.php b/core/modules/user/tests/src/Unit/Plugin/views/field/UserBulkFormTest.php
index cdbd30a5d7091d0279fc87caccfbfac52ef816aa..11a970a0bf3939fcb3eefcf71bd0904f3c116f3b 100644
--- a/core/modules/user/tests/src/Unit/Plugin/views/field/UserBulkFormTest.php
+++ b/core/modules/user/tests/src/Unit/Plugin/views/field/UserBulkFormTest.php
@@ -25,7 +25,7 @@ protected function tearDown() {
    * Tests the constructor assignment of actions.
    */
   public function testConstructor() {
-    $actions = array();
+    $actions = [];
 
     for ($i = 1; $i <= 2; $i++) {
       $action = $this->getMock('\Drupal\system\ActionConfigEntityInterface');
@@ -60,7 +60,7 @@ public function testConstructor() {
     $views_data->expects($this->any())
       ->method('get')
       ->with('users')
-      ->will($this->returnValue(array('table' => array('entity type' => 'user'))));
+      ->will($this->returnValue(['table' => ['entity type' => 'user']]));
     $container = new ContainerBuilder();
     $container->set('views.views_data', $views_data);
     $container->set('string_translation', $this->getStringTranslationStub());
@@ -82,9 +82,9 @@ public function testConstructor() {
       ->getMock();
 
     $definition['title'] = '';
-    $options = array();
+    $options = [];
 
-    $user_bulk_form = new UserBulkForm(array(), 'user_bulk_form', $definition, $entity_manager, $language_manager);
+    $user_bulk_form = new UserBulkForm([], 'user_bulk_form', $definition, $entity_manager, $language_manager);
     $user_bulk_form->init($executable, $display, $options);
 
     $this->assertAttributeEquals(array_slice($actions, 0, -1, TRUE), 'actions', $user_bulk_form);
diff --git a/core/modules/user/tests/src/Unit/PrivateTempStoreTest.php b/core/modules/user/tests/src/Unit/PrivateTempStoreTest.php
index 515c862a4f6f6bbd55255fa527c7c28eb8bddc3b..c038b71809a2662f866ce301b20a46df938a9a89 100644
--- a/core/modules/user/tests/src/Unit/PrivateTempStoreTest.php
+++ b/core/modules/user/tests/src/Unit/PrivateTempStoreTest.php
@@ -81,11 +81,11 @@ protected function setUp() {
 
     $this->tempStore = new PrivateTempStore($this->keyValue, $this->lock, $this->currentUser, $this->requestStack, 604800);
 
-    $this->ownObject = (object) array(
+    $this->ownObject = (object) [
       'data' => 'test_data',
       'owner' => $this->currentUser->id(),
       'updated' => (int) $request->server->get('REQUEST_TIME'),
-    );
+    ];
 
     // Clone the object but change the owner.
     $this->otherObject = clone $this->ownObject;
diff --git a/core/modules/user/tests/src/Unit/SharedTempStoreTest.php b/core/modules/user/tests/src/Unit/SharedTempStoreTest.php
index 15a4ec6c24a2a00909e8dd5d2364121f09c9e77c..ba556a3aeaee79c6a1b998e398f2283236541a8e 100644
--- a/core/modules/user/tests/src/Unit/SharedTempStoreTest.php
+++ b/core/modules/user/tests/src/Unit/SharedTempStoreTest.php
@@ -76,11 +76,11 @@ protected function setUp() {
 
     $this->tempStore = new SharedTempStore($this->keyValue, $this->lock, $this->owner, $this->requestStack, 604800);
 
-    $this->ownObject = (object) array(
+    $this->ownObject = (object) [
       'data' => 'test_data',
       'owner' => $this->owner,
       'updated' => (int) $request->server->get('REQUEST_TIME'),
-    );
+    ];
 
     // Clone the object but change the owner.
     $this->otherObject = clone $this->ownObject;
diff --git a/core/modules/user/tests/src/Unit/UserAccessControlHandlerTest.php b/core/modules/user/tests/src/Unit/UserAccessControlHandlerTest.php
index 4657a5d50413ec458d303193ffc83b0c5407e80b..216e8d652217865b7c421f2fef8a45cb89752a55 100644
--- a/core/modules/user/tests/src/Unit/UserAccessControlHandlerTest.php
+++ b/core/modules/user/tests/src/Unit/UserAccessControlHandlerTest.php
@@ -80,10 +80,10 @@ protected function setUp() {
     $this->owner
       ->expects($this->any())
       ->method('hasPermission')
-      ->will($this->returnValueMap(array(
-        array('administer users', FALSE),
-        array('change own username', TRUE),
-      )));
+      ->will($this->returnValueMap([
+        ['administer users', FALSE],
+        ['change own username', TRUE],
+      ]));
 
     $this->owner
       ->expects($this->any())
@@ -102,7 +102,7 @@ protected function setUp() {
     $module_handler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $module_handler->expects($this->any())
       ->method('getImplementations')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->accessControlHandler->setModuleHandler($module_handler);
 
     $this->items = $this->getMockBuilder('Drupal\Core\Field\FieldItemList')
@@ -128,7 +128,7 @@ public function assertFieldAccess($field, $viewer, $target, $view, $edit) {
       ->method('getEntity')
       ->will($this->returnValue($this->{$target}));
 
-    foreach (array('view' => $view, 'edit' => $edit) as $operation => $result) {
+    foreach (['view' => $view, 'edit' => $edit] as $operation => $result) {
       $result_text = !isset($result) ? 'null' : ($result ? 'true' : 'false');
       $message = "User '$field' field access returns '$result_text' with operation '$operation' for '$viewer' accessing '$target'";
       $this->assertSame($result, $this->accessControlHandler->fieldAccess($operation, $field_definition, $this->{$viewer}, $this->items), $message);
@@ -148,41 +148,41 @@ public function testUserNameAccess($viewer, $target, $view, $edit) {
    * Provides test data for testUserNameAccess().
    */
   public function userNameProvider() {
-    $name_access = array(
+    $name_access = [
       // The viewer user is allowed to see user names on all accounts.
-      array(
+      [
         'viewer' => 'viewer',
         'target' => 'viewer',
         'view' => TRUE,
         'edit' => FALSE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'owner',
         'target' => 'viewer',
         'view' => TRUE,
         'edit' => FALSE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'viewer',
         'target' => 'owner',
         'view' => TRUE,
         'edit' => FALSE,
-      ),
+      ],
       // The owner user is allowed to change its own user name.
-      array(
+      [
         'viewer' => 'owner',
         'target' => 'owner',
         'view' => TRUE,
         'edit' => TRUE,
-      ),
+      ],
       // The users-administrator user has full access.
-      array(
+      [
         'viewer' => 'admin',
         'target' => 'owner',
         'view' => TRUE,
         'edit' => TRUE,
-      ),
-    );
+      ],
+    ];
     return $name_access;
   }
 
@@ -199,24 +199,24 @@ public function testHiddenUserSettings($field, $viewer, $target, $view, $edit) {
    * Provides test data for testHiddenUserSettings().
    */
   public function hiddenUserSettingsProvider() {
-    $access_info = array();
+    $access_info = [];
 
-    $fields = array(
+    $fields = [
       'preferred_langcode',
       'preferred_admin_langcode',
       'timezone',
       'mail',
-    );
+    ];
 
     foreach ($fields as $field) {
-      $access_info[] = array(
+      $access_info[] = [
         'field' => $field,
         'viewer' => 'viewer',
         'target' => 'viewer',
         'view' => TRUE,
         'edit' => TRUE,
-      );
-      $access_info[] = array(
+      ];
+      $access_info[] = [
         'field' => $field,
         'viewer' => 'viewer',
         'target' => 'owner',
@@ -225,21 +225,21 @@ public function hiddenUserSettingsProvider() {
         // reality edit access will already be checked on entity level and the
         // user without view access will typically not be able to edit.
         'edit' => TRUE,
-      );
-      $access_info[] = array(
+      ];
+      $access_info[] = [
         'field' => $field,
         'viewer' => 'owner',
         'target' => 'owner',
         'view' => TRUE,
         'edit' => TRUE,
-      );
-      $access_info[] = array(
+      ];
+      $access_info[] = [
         'field' => $field,
         'viewer' => 'admin',
         'target' => 'owner',
         'view' => TRUE,
         'edit' => TRUE,
-      );
+      ];
     }
 
     return $access_info;
@@ -258,38 +258,38 @@ public function testAdminFieldAccess($field, $viewer, $target, $view, $edit) {
    * Provides test data for testAdminFieldAccess().
    */
   public function adminFieldAccessProvider() {
-    $access_info = array();
+    $access_info = [];
 
-    $fields = array(
+    $fields = [
       'roles',
       'status',
       'access',
       'login',
       'init',
-    );
+    ];
 
     foreach ($fields as $field) {
-      $access_info[] = array(
+      $access_info[] = [
         'field' => $field,
         'viewer' => 'viewer',
         'target' => 'viewer',
         'view' => FALSE,
         'edit' => FALSE,
-      );
-      $access_info[] = array(
+      ];
+      $access_info[] = [
         'field' => $field,
         'viewer' => 'viewer',
         'target' => 'owner',
         'view' => FALSE,
         'edit' => FALSE,
-      );
-      $access_info[] = array(
+      ];
+      $access_info[] = [
         'field' => $field,
         'viewer' => 'admin',
         'target' => 'owner',
         'view' => TRUE,
         'edit' => TRUE,
-      );
+      ];
     }
 
     return $access_info;
@@ -308,14 +308,14 @@ public function testPasswordAccess($viewer, $target, $view, $edit) {
    * Provides test data for passwordAccessProvider().
    */
   public function passwordAccessProvider() {
-    $pass_access = array(
-      array(
+    $pass_access = [
+      [
         'viewer' => 'viewer',
         'target' => 'viewer',
         'view' => FALSE,
         'edit' => TRUE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'viewer',
         'target' => 'owner',
         'view' => FALSE,
@@ -323,20 +323,20 @@ public function passwordAccessProvider() {
         // reality edit access will already be checked on entity level and the
         // user without view access will typically not be able to edit.
         'edit' => TRUE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'owner',
         'target' => 'viewer',
         'view' => FALSE,
         'edit' => TRUE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'admin',
         'target' => 'owner',
         'view' => FALSE,
         'edit' => TRUE,
-      ),
-    );
+      ],
+    ];
     return $pass_access;
   }
 
@@ -353,26 +353,26 @@ public function testCreatedAccess($viewer, $target, $view, $edit) {
    * Provides test data for testCreatedAccess().
    */
   public function createdAccessProvider() {
-    $created_access = array(
-      array(
+    $created_access = [
+      [
         'viewer' => 'viewer',
         'target' => 'viewer',
         'view' => TRUE,
         'edit' => FALSE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'owner',
         'target' => 'viewer',
         'view' => TRUE,
         'edit' => FALSE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'admin',
         'target' => 'owner',
         'view' => TRUE,
         'edit' => TRUE,
-      ),
-    );
+      ],
+    ];
     return $created_access;
   }
 
@@ -392,26 +392,26 @@ public function testNonExistingFieldAccess($viewer, $target, $view, $edit) {
    * Provides test data for testNonExistingFieldAccess().
    */
   public function NonExistingFieldAccessProvider() {
-    $created_access = array(
-      array(
+    $created_access = [
+      [
         'viewer' => 'viewer',
         'target' => 'viewer',
         'view' => TRUE,
         'edit' => TRUE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'owner',
         'target' => 'viewer',
         'view' => TRUE,
         'edit' => TRUE,
-      ),
-      array(
+      ],
+      [
         'viewer' => 'admin',
         'target' => 'owner',
         'view' => TRUE,
         'edit' => TRUE,
-      ),
-    );
+      ],
+    ];
     return $created_access;
   }
 
diff --git a/core/modules/user/tests/src/Unit/UserAuthTest.php b/core/modules/user/tests/src/Unit/UserAuthTest.php
index 1b96d8f80dc62acb79a04fedabc70823961d0576..698c8b5fead8de956b4a5febf4fda653bdab21dc 100644
--- a/core/modules/user/tests/src/Unit/UserAuthTest.php
+++ b/core/modules/user/tests/src/Unit/UserAuthTest.php
@@ -69,7 +69,7 @@ protected function setUp() {
 
     $this->testUser = $this->getMockBuilder('Drupal\user\Entity\User')
       ->disableOriginalConstructor()
-      ->setMethods(array('id', 'setPassword', 'save', 'getPassword'))
+      ->setMethods(['id', 'setPassword', 'save', 'getPassword'])
       ->getMock();
 
     $this->userAuth = new UserAuth($entity_manager, $this->passwordService);
@@ -95,12 +95,12 @@ public function testAuthenticateWithMissingCredentials($username, $password) {
    * @return array
    */
   public function providerTestAuthenticateWithMissingCredentials() {
-    return array(
-      array(NULL, NULL),
-      array(NULL, ''),
-      array('', NULL),
-      array('', ''),
-    );
+    return [
+      [NULL, NULL],
+      [NULL, ''],
+      ['', NULL],
+      ['', ''],
+    ];
   }
 
   /**
@@ -111,8 +111,8 @@ public function providerTestAuthenticateWithMissingCredentials() {
   public function testAuthenticateWithNoAccountReturned() {
     $this->userStorage->expects($this->once())
       ->method('loadByProperties')
-      ->with(array('name' => $this->username))
-      ->will($this->returnValue(array()));
+      ->with(['name' => $this->username])
+      ->will($this->returnValue([]));
 
     $this->assertFalse($this->userAuth->authenticate($this->username, $this->password));
   }
@@ -125,8 +125,8 @@ public function testAuthenticateWithNoAccountReturned() {
   public function testAuthenticateWithIncorrectPassword() {
     $this->userStorage->expects($this->once())
       ->method('loadByProperties')
-      ->with(array('name' => $this->username))
-      ->will($this->returnValue(array($this->testUser)));
+      ->with(['name' => $this->username])
+      ->will($this->returnValue([$this->testUser]));
 
     $this->passwordService->expects($this->once())
       ->method('check')
@@ -148,8 +148,8 @@ public function testAuthenticateWithCorrectPassword() {
 
     $this->userStorage->expects($this->once())
       ->method('loadByProperties')
-      ->with(array('name' => $this->username))
-      ->will($this->returnValue(array($this->testUser)));
+      ->with(['name' => $this->username])
+      ->will($this->returnValue([$this->testUser]));
 
     $this->passwordService->expects($this->once())
       ->method('check')
@@ -175,8 +175,8 @@ public function testAuthenticateWithZeroPassword() {
 
     $this->userStorage->expects($this->once())
       ->method('loadByProperties')
-      ->with(array('name' => $this->username))
-      ->will($this->returnValue(array($this->testUser)));
+      ->with(['name' => $this->username])
+      ->will($this->returnValue([$this->testUser]));
 
     $this->passwordService->expects($this->once())
       ->method('check')
@@ -203,8 +203,8 @@ public function testAuthenticateWithCorrectPasswordAndNewPasswordHash() {
 
     $this->userStorage->expects($this->once())
       ->method('loadByProperties')
-      ->with(array('name' => $this->username))
-      ->will($this->returnValue(array($this->testUser)));
+      ->with(['name' => $this->username])
+      ->will($this->returnValue([$this->testUser]));
 
     $this->passwordService->expects($this->once())
       ->method('check')
diff --git a/core/modules/user/tests/src/Unit/Views/Argument/RolesRidTest.php b/core/modules/user/tests/src/Unit/Views/Argument/RolesRidTest.php
index 8693fc4b3759d6a4b43f81ecb790a7d3e480ac30..b8f28884260ce605683e3c063ad439e2c76d79b3 100644
--- a/core/modules/user/tests/src/Unit/Views/Argument/RolesRidTest.php
+++ b/core/modules/user/tests/src/Unit/Views/Argument/RolesRidTest.php
@@ -19,24 +19,24 @@ class RolesRidTest extends UnitTestCase {
    * @covers ::titleQuery
    */
   public function testTitleQuery() {
-    $role1 = new Role(array(
+    $role1 = new Role([
       'id' => 'test_rid_1',
       'label' => 'test rid 1'
-    ), 'user_role');
-    $role2 = new Role(array(
+    ], 'user_role');
+    $role2 = new Role([
       'id' => 'test_rid_2',
       'label' => 'test <strong>rid 2</strong>',
-    ), 'user_role');
+    ], 'user_role');
 
     // Creates a stub entity storage;
     $role_storage = $this->getMockForAbstractClass('Drupal\Core\Entity\EntityStorageInterface');
     $role_storage->expects($this->any())
       ->method('loadMultiple')
-      ->will($this->returnValueMap(array(
-        array(array(), array()),
-        array(array('test_rid_1'), array('test_rid_1' => $role1)),
-        array(array('test_rid_1', 'test_rid_2'), array('test_rid_1' => $role1, 'test_rid_2' => $role2)),
-      )));
+      ->will($this->returnValueMap([
+        [[], []],
+        [['test_rid_1'], ['test_rid_1' => $role1]],
+        [['test_rid_1', 'test_rid_2'], ['test_rid_1' => $role1, 'test_rid_2' => $role2]],
+      ]));
 
     $entity_type = $this->getMock('Drupal\Core\Entity\EntityTypeInterface');
     $entity_type->expects($this->any())
@@ -63,19 +63,19 @@ public function testTitleQuery() {
     $container->set('entity.manager', $entity_manager);
     \Drupal::setContainer($container);
 
-    $roles_rid_argument = new RolesRid(array(), 'user__roles_rid', array(), $entity_manager);
+    $roles_rid_argument = new RolesRid([], 'user__roles_rid', [], $entity_manager);
 
-    $roles_rid_argument->value = array();
+    $roles_rid_argument->value = [];
     $titles = $roles_rid_argument->titleQuery();
-    $this->assertEquals(array(), $titles);
+    $this->assertEquals([], $titles);
 
-    $roles_rid_argument->value = array('test_rid_1');
+    $roles_rid_argument->value = ['test_rid_1'];
     $titles = $roles_rid_argument->titleQuery();
-    $this->assertEquals(array('test rid 1'), $titles);
+    $this->assertEquals(['test rid 1'], $titles);
 
-    $roles_rid_argument->value = array('test_rid_1', 'test_rid_2');
+    $roles_rid_argument->value = ['test_rid_1', 'test_rid_2'];
     $titles = $roles_rid_argument->titleQuery();
-    $this->assertEquals(array('test rid 1', 'test <strong>rid 2</strong>'), $titles);
+    $this->assertEquals(['test rid 1', 'test <strong>rid 2</strong>'], $titles);
   }
 
 }
diff --git a/core/modules/user/user.api.php b/core/modules/user/user.api.php
index 2f40eb90b46fdcbda3e395363978fdb0c10dbeef..364dd1ac6343acfe77016ef821dba6ec11c758a2 100644
--- a/core/modules/user/user.api.php
+++ b/core/modules/user/user.api.php
@@ -44,7 +44,7 @@ function hook_user_cancel($edit, $account, $method) {
       $nodes = \Drupal::entityQuery('node')
         ->condition('uid', $account->id())
         ->execute();
-      node_mass_update($nodes, array('status' => 0), NULL, TRUE);
+      node_mass_update($nodes, ['status' => 0], NULL, TRUE);
       break;
 
     case 'user_cancel_reassign':
@@ -53,10 +53,10 @@ function hook_user_cancel($edit, $account, $method) {
       $nodes = \Drupal::entityQuery('node')
         ->condition('uid', $account->id())
         ->execute();
-      node_mass_update($nodes, array('uid' => 0), NULL, TRUE);
+      node_mass_update($nodes, ['uid' => 0], NULL, TRUE);
       // Anonymize old revisions.
       db_update('node_field_revision')
-        ->fields(array('uid' => 0))
+        ->fields(['uid' => 0])
         ->condition('uid', $account->id())
         ->execute();
       break;
@@ -94,12 +94,12 @@ function hook_user_cancel_methods_alter(&$methods) {
   unset($methods['user_cancel_reassign']);
 
   // Add a custom zero-out method.
-  $methods['mymodule_zero_out'] = array(
+  $methods['mymodule_zero_out'] = [
     'title' => t('Delete the account and remove all content.'),
     'description' => t('All your content will be replaced by empty strings.'),
     // access should be used for administrative methods only.
     'access' => $account->hasPermission('access zero-out account cancellation method'),
-  );
+  ];
 }
 
 /**
@@ -123,7 +123,7 @@ function hook_user_cancel_methods_alter(&$methods) {
 function hook_user_format_name_alter(&$name, $account) {
   // Display the user's uid instead of name.
   if ($account->id()) {
-    $name = t('User @uid', array('@uid' => $account->id()));
+    $name = t('User @uid', ['@uid' => $account->id()]);
   }
 }
 
@@ -137,7 +137,7 @@ function hook_user_login($account) {
   $config = \Drupal::config('system.date');
   // If the user has a NULL time zone, notify them to set a time zone.
   if (!$account->getTimezone() && $config->get('timezone.user.configurable') && $config->get('timezone.user.warn')) {
-    drupal_set_message(t('Configure your <a href=":user-edit">account time zone setting</a>.', array(':user-edit' => $account->url('edit-form', array('query' => \Drupal::destination()->getAsArray(), 'fragment' => 'edit-timezone')))));
+    drupal_set_message(t('Configure your <a href=":user-edit">account time zone setting</a>.', [':user-edit' => $account->url('edit-form', ['query' => \Drupal::destination()->getAsArray(), 'fragment' => 'edit-timezone'])]));
   }
 }
 
@@ -149,10 +149,10 @@ function hook_user_login($account) {
  */
 function hook_user_logout($account) {
   db_insert('logouts')
-    ->fields(array(
+    ->fields([
       'uid' => $account->id(),
       'time' => time(),
-    ))
+    ])
     ->execute();
 }
 
diff --git a/core/modules/user/user.install b/core/modules/user/user.install
index 7cc46ef6aa62d9f82109ec9d70b0457173784442..330ad149b582ad590c7fd2e631fcb65ba2554d98 100644
--- a/core/modules/user/user.install
+++ b/core/modules/user/user.install
@@ -9,53 +9,53 @@
  * Implements hook_schema().
  */
 function user_schema() {
-  $schema['users_data'] = array(
+  $schema['users_data'] = [
     'description' => 'Stores module data as key/value pairs per user.',
-    'fields' => array(
-      'uid' => array(
+    'fields' => [
+      'uid' => [
         'description' => 'Primary key: {users}.uid for user.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
-      ),
-      'module' => array(
+      ],
+      'module' => [
         'description' => 'The name of the module declaring the variable.',
         'type' => 'varchar_ascii',
         'length' => DRUPAL_EXTENSION_NAME_MAX_LENGTH,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'name' => array(
+      ],
+      'name' => [
         'description' => 'The identifier of the data.',
         'type' => 'varchar_ascii',
         'length' => 128,
         'not null' => TRUE,
         'default' => '',
-      ),
-      'value' => array(
+      ],
+      'value' => [
         'description' => 'The value.',
         'type' => 'blob',
         'not null' => FALSE,
         'size' => 'big',
-      ),
-      'serialized' => array(
+      ],
+      'serialized' => [
         'description' => 'Whether value is serialized.',
         'type' => 'int',
         'size' => 'tiny',
         'unsigned' => TRUE,
         'default' => 0,
-      ),
-    ),
-    'primary key' => array('uid', 'module', 'name'),
-    'indexes' => array(
-      'module' => array('module'),
-      'name' => array('name'),
-    ),
-    'foreign keys' => array(
-      'uid' => array('users' => 'uid'),
-    ),
-  );
+      ],
+    ],
+    'primary key' => ['uid', 'module', 'name'],
+    'indexes' => [
+      'module' => ['module'],
+      'name' => ['name'],
+    ],
+    'foreign keys' => [
+      'uid' => ['users' => 'uid'],
+    ],
+  ];
 
   return $schema;
 }
@@ -67,22 +67,22 @@ function user_install() {
   $storage = \Drupal::entityManager()->getStorage('user');
   // Insert a row for the anonymous user.
   $storage
-    ->create(array(
+    ->create([
       'uid' => 0,
       'status' => 0,
       'name' => '',
-    ))
+    ])
     ->save();
 
   // We need some placeholders here as name and mail are unique.
   // This will be changed by the settings form in the installer.
   $storage
-    ->create(array(
+    ->create([
       'uid' => 1,
       'name' => 'placeholder-for-uid-1',
       'mail' => 'placeholder-for-uid-1',
       'status' => TRUE,
-    ))
+    ])
     ->save();
 }
 
diff --git a/core/modules/user/user.module b/core/modules/user/user.module
index 638ed649e5f0ca0d63fca5b2534e2fae35722f3f..b865e958d9e9ef64ea48598db6ba7b1baa3b12cf 100644
--- a/core/modules/user/user.module
+++ b/core/modules/user/user.module
@@ -68,19 +68,19 @@ function user_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.user':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The User module allows users to register, log in, and log out. It also allows users with proper permissions to manage user roles and permissions. For more information, see the <a href=":user_docs">online documentation for the User module</a>.', array(':user_docs' => 'https://www.drupal.org/documentation/modules/user')) . '</p>';
+      $output .= '<p>' . t('The User module allows users to register, log in, and log out. It also allows users with proper permissions to manage user roles and permissions. For more information, see the <a href=":user_docs">online documentation for the User module</a>.', [':user_docs' => 'https://www.drupal.org/documentation/modules/user']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Creating and managing users') . '</dt>';
-      $output .= '<dd>' . t('Through the <a href=":people">People administration page</a> you can add and cancel user accounts and assign users to roles. By editing one particular user you can change their username, email address, password, and information in other fields.', array(':people' => \Drupal::url('entity.user.collection'))) . '</dd>';
+      $output .= '<dd>' . t('Through the <a href=":people">People administration page</a> you can add and cancel user accounts and assign users to roles. By editing one particular user you can change their username, email address, password, and information in other fields.', [':people' => \Drupal::url('entity.user.collection')]) . '</dd>';
       $output .= '<dt>' . t('Configuring user roles') . '</dt>';
-      $output .= '<dd>' . t('<em>Roles</em> are used to group and classify users; each user can be assigned one or more roles. Typically there are two pre-defined roles: <em>Anonymous user</em> (users that are not logged in), and <em>Authenticated user</em> (users that are registered and logged in). Depending on how your site was set up, an <em>Administrator</em> role may also be available: users with this role will automatically be assigned any new permissions whenever a module is enabled. You can create additional roles on the <a href=":roles">Roles administration page</a>.', array(':roles' => \Drupal::url('entity.user_role.collection'))) . '</dd>';
+      $output .= '<dd>' . t('<em>Roles</em> are used to group and classify users; each user can be assigned one or more roles. Typically there are two pre-defined roles: <em>Anonymous user</em> (users that are not logged in), and <em>Authenticated user</em> (users that are registered and logged in). Depending on how your site was set up, an <em>Administrator</em> role may also be available: users with this role will automatically be assigned any new permissions whenever a module is enabled. You can create additional roles on the <a href=":roles">Roles administration page</a>.', [':roles' => \Drupal::url('entity.user_role.collection')]) . '</dd>';
       $output .= '<dt>' . t('Setting permissions') . '</dt>';
-      $output .= '<dd>' . t('After creating roles, you can set permissions for each role on the <a href=":permissions_user">Permissions page</a>. Granting a permission allows users who have been assigned a particular role to perform an action on the site, such as viewing content, editing or creating  a particular type of content, administering settings for a particular module, or using a particular function of the site (such as search).', array(':permissions_user' => \Drupal::url('user.admin_permissions'))) . '</dd>';
+      $output .= '<dd>' . t('After creating roles, you can set permissions for each role on the <a href=":permissions_user">Permissions page</a>. Granting a permission allows users who have been assigned a particular role to perform an action on the site, such as viewing content, editing or creating  a particular type of content, administering settings for a particular module, or using a particular function of the site (such as search).', [':permissions_user' => \Drupal::url('user.admin_permissions')]) . '</dd>';
       $output .= '<dt>' . t('Managing account settings') . '</dt>';
-      $output .= '<dd>' . t('The <a href=":accounts">Account settings page</a> allows you to manage settings for the displayed name of the Anonymous user role, personal contact forms, user registration settings, and account cancellation settings. On this page you can also manage settings for account personalization, and adapt the text for the email messages that users receive when they register or request a password recovery. You may also set which role is automatically assigned new permissions whenever a module is enabled (the Administrator role).', array(':accounts'  => \Drupal::url('entity.user.admin_form'))) . '</dd>';
+      $output .= '<dd>' . t('The <a href=":accounts">Account settings page</a> allows you to manage settings for the displayed name of the Anonymous user role, personal contact forms, user registration settings, and account cancellation settings. On this page you can also manage settings for account personalization, and adapt the text for the email messages that users receive when they register or request a password recovery. You may also set which role is automatically assigned new permissions whenever a module is enabled (the Administrator role).', [':accounts'  => \Drupal::url('entity.user.admin_form')]) . '</dd>';
       $output .= '<dt>' . t('Managing user account fields') . '</dt>';
-      $output .= '<dd>' . t('Because User accounts are an entity type, you can extend them by adding fields through the Manage fields tab on the <a href=":accounts">Account settings page</a>. By adding fields for e.g., a picture, a biography, or address, you can a create a custom profile for the users of the website. For background information on entities and fields, see the <a href=":field_help">Field module help page</a>.', array(':field_help' => (\Drupal::moduleHandler()->moduleExists('field')) ? \Drupal::url('help.page', array('name' => 'field')) : '#', ':accounts' => \Drupal::url('entity.user.admin_form'))) . '</dd>';
+      $output .= '<dd>' . t('Because User accounts are an entity type, you can extend them by adding fields through the Manage fields tab on the <a href=":accounts">Account settings page</a>. By adding fields for e.g., a picture, a biography, or address, you can a create a custom profile for the users of the website. For background information on entities and fields, see the <a href=":field_help">Field module help page</a>.', [':field_help' => (\Drupal::moduleHandler()->moduleExists('field')) ? \Drupal::url('help.page', ['name' => 'field']) : '#', ':accounts' => \Drupal::url('entity.user.admin_form')]) . '</dd>';
       $output .= '</dl>';
       return $output;
 
@@ -88,10 +88,10 @@ function user_help($route_name, RouteMatchInterface $route_match) {
       return '<p>' . t("This web page allows administrators to register new users. Users' email addresses and usernames must be unique.") . '</p>';
 
     case 'user.admin_permissions':
-      return '<p>' . t('Permissions let you control what users can do and see on your site. You can define a specific set of permissions for each role. (See the <a href=":role">Roles</a> page to create a role.) Any permissions granted to the Authenticated user role will be given to any user who is logged in to your site. From the <a href=":settings">Account settings</a> page, you can make any role into an Administrator role for the site, meaning that role will be granted all new permissions automatically. You should be careful to ensure that only trusted users are given this access and level of control of your site.', array(':role' => \Drupal::url('entity.user_role.collection'), ':settings' => \Drupal::url('entity.user.admin_form'))) . '</p>';
+      return '<p>' . t('Permissions let you control what users can do and see on your site. You can define a specific set of permissions for each role. (See the <a href=":role">Roles</a> page to create a role.) Any permissions granted to the Authenticated user role will be given to any user who is logged in to your site. From the <a href=":settings">Account settings</a> page, you can make any role into an Administrator role for the site, meaning that role will be granted all new permissions automatically. You should be careful to ensure that only trusted users are given this access and level of control of your site.', [':role' => \Drupal::url('entity.user_role.collection'), ':settings' => \Drupal::url('entity.user.admin_form')]) . '</p>';
 
     case 'entity.user_role.collection':
-      return '<p>' . t('A role defines a group of users that have certain privileges. These privileges are defined on the <a href=":permissions">Permissions page</a>. Here, you can define the names and the display sort order of the roles on your site. It is recommended to order roles from least permissive (for example, Anonymous user) to most permissive (for example, Administrator user). Users who are not logged in have the Anonymous user role. Users who are logged in have the Authenticated user role, plus any other roles granted to their user account.', array(':permissions' => \Drupal::url('user.admin_permissions'))) . '</p>';
+      return '<p>' . t('A role defines a group of users that have certain privileges. These privileges are defined on the <a href=":permissions">Permissions page</a>. Here, you can define the names and the display sort order of the roles on your site. It is recommended to order roles from least permissive (for example, Anonymous user) to most permissive (for example, Administrator user). Users who are not logged in have the Anonymous user role. Users who are logged in have the Authenticated user role, plus any other roles granted to their user account.', [':permissions' => \Drupal::url('user.admin_permissions')]) . '</p>';
 
     case 'entity.user.field_ui_fields':
       return '<p>' . t('This form lets administrators add and edit fields for storing user data.') . '</p>';
@@ -108,14 +108,14 @@ function user_help($route_name, RouteMatchInterface $route_match) {
  * Implements hook_theme().
  */
 function user_theme() {
-  return array(
-    'user' => array(
+  return [
+    'user' => [
       'render element' => 'elements',
-    ),
-    'username' => array(
-      'variables' => array('account' => NULL, 'attributes' => array(), 'link_options' => array()),
-    ),
-  );
+    ],
+    'username' => [
+      'variables' => ['account' => NULL, 'attributes' => [], 'link_options' => []],
+    ],
+  ];
 }
 
 /**
@@ -149,29 +149,29 @@ function user_picture_enabled() {
  * Implements hook_entity_extra_field_info().
  */
 function user_entity_extra_field_info() {
-  $fields['user']['user']['form']['account'] = array(
+  $fields['user']['user']['form']['account'] = [
     'label' => t('User name and password'),
     'description' => t('User module account form elements.'),
     'weight' => -10,
-  );
-  $fields['user']['user']['form']['language'] = array(
+  ];
+  $fields['user']['user']['form']['language'] = [
     'label' => t('Language settings'),
     'description' => t('User module form element.'),
     'weight' => 0,
-  );
+  ];
   if (\Drupal::config('system.date')->get('timezone.user.configurable')) {
-    $fields['user']['user']['form']['timezone'] = array(
+    $fields['user']['user']['form']['timezone'] = [
       'label' => t('Timezone'),
       'description' => t('System module form element.'),
       'weight' => 6,
-    );
+    ];
   }
 
-  $fields['user']['user']['display']['member_for'] = array(
+  $fields['user']['user']['display']['member_for'] = [
     'label' => t('Member for'),
     'description' => t('User module \'member for\' view element.'),
     'weight' => 5,
-  );
+  ];
 
   return $fields;
 }
@@ -228,7 +228,7 @@ function user_load_multiple(array $uids = NULL, $reset = FALSE) {
  */
 function user_load($uid, $reset = FALSE) {
   if ($reset) {
-    \Drupal::entityManager()->getStorage('user')->resetCache(array($uid));
+    \Drupal::entityManager()->getStorage('user')->resetCache([$uid]);
   }
   return User::load($uid);
 }
@@ -279,7 +279,7 @@ function user_load_by_name($name) {
  */
 function user_validate_name($name) {
   $definition = BaseFieldDefinition::create('string')
-    ->addConstraint('UserName', array());
+    ->addConstraint('UserName', []);
   $data = \Drupal::typedDataManager()->create($definition);
   $data->setValue($name);
   $violations = $data->validate();
@@ -334,9 +334,9 @@ function user_role_permissions(array $roles) {
     return _user_role_permissions_update($roles);
   }
   $entities = Role::loadMultiple($roles);
-  $role_permissions = array();
+  $role_permissions = [];
   foreach ($roles as $rid) {
-    $role_permissions[$rid] = isset($entities[$rid]) ? $entities[$rid]->getPermissions() : array();
+    $role_permissions[$rid] = isset($entities[$rid]) ? $entities[$rid]->getPermissions() : [];
   }
   return $role_permissions;
 }
@@ -356,9 +356,9 @@ function user_role_permissions(array $roles) {
  *   for the given role.
  */
 function _user_role_permissions_update($roles) {
-  $role_permissions = array();
+  $role_permissions = [];
   foreach ($roles as $rid) {
-    $role_permissions[$rid] = \Drupal::config("user.role.$rid")->get('permissions') ?: array();
+    $role_permissions[$rid] = \Drupal::config("user.role.$rid")->get('permissions') ?: [];
   }
   return $role_permissions;
 }
@@ -384,10 +384,10 @@ function user_is_blocked($name) {
  */
 function user_user_view(array &$build, UserInterface $account, EntityViewDisplayInterface $display) {
   if ($display->getComponent('member_for')) {
-    $build['member_for'] = array(
+    $build['member_for'] = [
       '#type' => 'item',
       '#markup' => '<h4 class="label">' . t('Member for') . '</h4> ' . \Drupal::service('date.formatter')->formatTimeDiffSince($account->getCreatedTime()),
-    );
+    ];
   }
 }
 
@@ -519,9 +519,9 @@ function template_preprocess_username(&$variables) {
         ->toString();
     }
     else {
-      $variables['attributes']['href'] = Url::fromRoute('entity.user.canonical', array(
+      $variables['attributes']['href'] = Url::fromRoute('entity.user.canonical', [
         'user' => $variables['uid'],
-      ))->toString();
+      ])->toString();
     }
   }
 }
@@ -542,7 +542,7 @@ function template_preprocess_username(&$variables) {
  */
 function user_login_finalize(UserInterface $account) {
   \Drupal::currentUser()->setAccount($account);
-  \Drupal::logger('user')->notice('Session opened for %name.', array('%name' => $account->getUsername()));
+  \Drupal::logger('user')->notice('Session opened for %name.', ['%name' => $account->getUsername()]);
   // Update the user table timestamp noting user has logged in.
   // This is also used to invalidate one-time login links.
   $account->setLastLoginTime(REQUEST_TIME);
@@ -556,7 +556,7 @@ function user_login_finalize(UserInterface $account) {
   // in place.
   \Drupal::service('session')->migrate();
   \Drupal::service('session')->set('uid', $account->id());
-  \Drupal::moduleHandler()->invokeAll('user_login', array($account));
+  \Drupal::moduleHandler()->invokeAll('user_login', [$account]);
 }
 
 /**
@@ -591,19 +591,19 @@ function user_user_logout($account) {
  *   A unique URL that provides a one-time log in for the user, from which
  *   they can change their password.
  */
-function user_pass_reset_url($account, $options = array()) {
+function user_pass_reset_url($account, $options = []) {
   $timestamp = REQUEST_TIME;
   $langcode = isset($options['langcode']) ? $options['langcode'] : $account->getPreferredLangcode();
   return \Drupal::url('user.reset',
-    array(
+    [
       'uid' => $account->id(),
       'timestamp' => $timestamp,
       'hash' => user_pass_rehash($account, $timestamp),
-    ),
-    array(
+    ],
+    [
       'absolute' => TRUE,
       'language' => \Drupal::languageManager()->getLanguage($langcode)
-    )
+    ]
   );
 }
 
@@ -624,10 +624,10 @@ function user_pass_reset_url($account, $options = array()) {
  * @see user_mail_tokens()
  * @see \Drupal\user\Controller\UserController::confirmCancel()
  */
-function user_cancel_url(UserInterface $account, $options = array()) {
+function user_cancel_url(UserInterface $account, $options = []) {
   $timestamp = REQUEST_TIME;
   $langcode = isset($options['langcode']) ? $options['langcode'] : $account->getPreferredLangcode();
-  $url_options = array('absolute' => TRUE, 'language' => \Drupal::languageManager()->getLanguage($langcode));
+  $url_options = ['absolute' => TRUE, 'language' => \Drupal::languageManager()->getLanguage($langcode)];
   return \Drupal::url('user.cancel_confirm', [
     'user' => $account->id(),
     'timestamp' => $timestamp,
@@ -683,16 +683,16 @@ function user_cancel($edit, $uid, $method) {
   $account = User::load($uid);
 
   if (!$account) {
-    drupal_set_message(t('The user account %id does not exist.', array('%id' => $uid)), 'error');
-    \Drupal::logger('user')->error('Attempted to cancel non-existing user account: %id.', array('%id' => $uid));
+    drupal_set_message(t('The user account %id does not exist.', ['%id' => $uid]), 'error');
+    \Drupal::logger('user')->error('Attempted to cancel non-existing user account: %id.', ['%id' => $uid]);
     return;
   }
 
   // Initialize batch (to set title).
-  $batch = array(
+  $batch = [
     'title' => t('Cancelling account'),
-    'operations' => array(),
-  );
+    'operations' => [],
+  ];
   batch_set($batch);
 
   // When the 'user_cancel_delete' method is used, user_delete() is called,
@@ -701,16 +701,16 @@ function user_cancel($edit, $uid, $method) {
   // account deletion.
   if ($method != 'user_cancel_delete') {
     // Allow modules to add further sets to this batch.
-    \Drupal::moduleHandler()->invokeAll('user_cancel', array($edit, $account, $method));
+    \Drupal::moduleHandler()->invokeAll('user_cancel', [$edit, $account, $method]);
   }
 
   // Finish the batch and actually cancel the account.
-  $batch = array(
+  $batch = [
     'title' => t('Cancelling user account'),
-    'operations' => array(
-      array('_user_cancel', array($edit, $account, $method)),
-    ),
-  );
+    'operations' => [
+      ['_user_cancel', [$edit, $account, $method]],
+    ],
+  ];
 
   // After cancelling account, ensure that user is logged out.
   if ($account->id() == \Drupal::currentUser()->id()) {
@@ -754,8 +754,8 @@ function _user_cancel($edit, $account, $method) {
       }
       $account->block();
       $account->save();
-      drupal_set_message(t('%name has been disabled.', array('%name' => $account->getDisplayName())));
-      $logger->notice('Blocked user: %name %email.', array('%name' => $account->getAccountName(), '%email' => '<' . $account->getEmail() . '>'));
+      drupal_set_message(t('%name has been disabled.', ['%name' => $account->getDisplayName()]));
+      $logger->notice('Blocked user: %name %email.', ['%name' => $account->getAccountName(), '%email' => '<' . $account->getEmail() . '>']);
       break;
 
     case 'user_cancel_reassign':
@@ -765,8 +765,8 @@ function _user_cancel($edit, $account, $method) {
         _user_mail_notify('status_canceled', $account);
       }
       $account->delete();
-      drupal_set_message(t('%name has been deleted.', array('%name' => $account->getDisplayName())));
-      $logger->notice('Deleted user: %name %email.', array('%name' => $account->getAccountName(), '%email' => '<' . $account->getEmail() . '>'));
+      drupal_set_message(t('%name has been deleted.', ['%name' => $account->getDisplayName()]));
+      $logger->notice('Deleted user: %name %email.', ['%name' => $account->getAccountName(), '%email' => '<' . $account->getEmail() . '>']);
       break;
   }
 
@@ -806,33 +806,33 @@ function _user_cancel_session_regenerate() {
 function user_cancel_methods() {
   $user_settings = \Drupal::config('user.settings');
   $anonymous_name = $user_settings->get('anonymous');
-  $methods = array(
-    'user_cancel_block' => array(
+  $methods = [
+    'user_cancel_block' => [
       'title' => t('Disable the account and keep its content.'),
       'description' => t('Your account will be blocked and you will no longer be able to log in. All of your content will remain attributed to your username.'),
-    ),
-    'user_cancel_block_unpublish' => array(
+    ],
+    'user_cancel_block_unpublish' => [
       'title' => t('Disable the account and unpublish its content.'),
       'description' => t('Your account will be blocked and you will no longer be able to log in. All of your content will be hidden from everyone but administrators.'),
-    ),
-    'user_cancel_reassign' => array(
-      'title' => t('Delete the account and make its content belong to the %anonymous-name user.', array('%anonymous-name' => $anonymous_name)),
-      'description' => t('Your account will be removed and all account information deleted. All of your content will be assigned to the %anonymous-name user.', array('%anonymous-name' => $anonymous_name)),
-    ),
-    'user_cancel_delete' => array(
+    ],
+    'user_cancel_reassign' => [
+      'title' => t('Delete the account and make its content belong to the %anonymous-name user.', ['%anonymous-name' => $anonymous_name]),
+      'description' => t('Your account will be removed and all account information deleted. All of your content will be assigned to the %anonymous-name user.', ['%anonymous-name' => $anonymous_name]),
+    ],
+    'user_cancel_delete' => [
       'title' => t('Delete the account and its content.'),
       'description' => t('Your account will be removed and all account information deleted. All of your content will also be deleted.'),
       'access' => \Drupal::currentUser()->hasPermission('administer users'),
-    ),
-  );
+    ],
+  ];
   // Allow modules to customize account cancellation methods.
   \Drupal::moduleHandler()->alter('user_cancel_methods', $methods);
 
   // Turn all methods into real form elements.
-  $form = array(
-    '#options' => array(),
+  $form = [
+    '#options' => [],
     '#default_value' => $user_settings->get('cancel_method'),
-  );
+  ];
   foreach ($methods as $name => $method) {
     $form['#options'][$name] = $method['title'];
     // Add the description for the confirmation form. This description is never
@@ -855,7 +855,7 @@ function user_cancel_methods() {
  *   A user ID.
  */
 function user_delete($uid) {
-  user_delete_multiple(array($uid));
+  user_delete_multiple([$uid]);
 }
 
 /**
@@ -924,7 +924,7 @@ function user_mail($key, &$message, $params) {
   $token_service = \Drupal::token();
   $language_manager = \Drupal::languageManager();
   $langcode = $message['langcode'];
-  $variables = array('user' => $params['account']);
+  $variables = ['user' => $params['account']];
 
   $language = $language_manager->getLanguage($params['account']->getPreferredLangcode());
   $original_language = $language_manager->getConfigOverrideLanguage();
@@ -994,34 +994,34 @@ function user_role_names($membersonly = FALSE, $permission = NULL) {
  */
 function user_user_role_insert(RoleInterface $role) {
   // Ignore the authenticated and anonymous roles or the role is being synced.
-  if (in_array($role->id(), array(RoleInterface::AUTHENTICATED_ID, RoleInterface::ANONYMOUS_ID)) || $role->isSyncing()) {
+  if (in_array($role->id(), [RoleInterface::AUTHENTICATED_ID, RoleInterface::ANONYMOUS_ID]) || $role->isSyncing()) {
     return;
   }
 
   $add_id = 'user_add_role_action.' . $role->id();
   if (!Action::load($add_id)) {
-    $action = Action::create(array(
+    $action = Action::create([
       'id' => $add_id,
       'type' => 'user',
-      'label' => t('Add the @label role to the selected users', array('@label' => $role->label())),
-      'configuration' => array(
+      'label' => t('Add the @label role to the selected users', ['@label' => $role->label()]),
+      'configuration' => [
         'rid' => $role->id(),
-      ),
+      ],
       'plugin' => 'user_add_role_action',
-    ));
+    ]);
     $action->trustData()->save();
   }
   $remove_id = 'user_remove_role_action.' . $role->id();
   if (!Action::load($remove_id)) {
-    $action = Action::create(array(
+    $action = Action::create([
       'id' => $remove_id,
       'type' => 'user',
-      'label' => t('Remove the @label role from the selected users', array('@label' => $role->label())),
-      'configuration' => array(
+      'label' => t('Remove the @label role from the selected users', ['@label' => $role->label()]),
+      'configuration' => [
         'rid' => $role->id(),
-      ),
+      ],
       'plugin' => 'user_remove_role_action',
-    ));
+    ]);
     $action->trustData()->save();
   }
 }
@@ -1032,10 +1032,10 @@ function user_user_role_insert(RoleInterface $role) {
 function user_user_role_delete(RoleInterface $role) {
   // Delete role references for all users.
   $user_storage = \Drupal::entityManager()->getStorage('user');
-  $user_storage->deleteRoleReferences(array($role->id()));
+  $user_storage->deleteRoleReferences([$role->id()]);
 
   // Ignore the authenticated and anonymous roles or the role is being synced.
-  if (in_array($role->id(), array(RoleInterface::AUTHENTICATED_ID, RoleInterface::ANONYMOUS_ID)) || $role->isSyncing()) {
+  if (in_array($role->id(), [RoleInterface::AUTHENTICATED_ID, RoleInterface::ANONYMOUS_ID]) || $role->isSyncing()) {
     return;
   }
 
@@ -1125,7 +1125,7 @@ function user_role_load($rid) {
  * @see user_role_grant_permissions()
  * @see user_role_revoke_permissions()
  */
-function user_role_change_permissions($rid, array $permissions = array()) {
+function user_role_change_permissions($rid, array $permissions = []) {
   // Grant new permissions for the role.
   $grant = array_filter($permissions);
   if (!empty($grant)) {
@@ -1149,7 +1149,7 @@ function user_role_change_permissions($rid, array $permissions = array()) {
  * @see user_role_change_permissions()
  * @see user_role_revoke_permissions()
  */
-function user_role_grant_permissions($rid, array $permissions = array()) {
+function user_role_grant_permissions($rid, array $permissions = []) {
   // Grant new permissions for the role.
   if ($role = Role::load($rid)) {
     foreach ($permissions as $permission) {
@@ -1170,7 +1170,7 @@ function user_role_grant_permissions($rid, array $permissions = array()) {
  * @see user_role_change_permissions()
  * @see user_role_grant_permissions()
  */
-function user_role_revoke_permissions($rid, array $permissions = array()) {
+function user_role_revoke_permissions($rid, array $permissions = []) {
   // Revoke permissions for the role.
   $role = Role::load($rid);
   foreach ($permissions as $permission) {
@@ -1251,16 +1251,16 @@ function user_element_info_alter(array &$types) {
  * validation.
  */
 function user_form_process_password_confirm($element) {
-  $password_settings = array(
+  $password_settings = [
     'confirmTitle' => t('Passwords match:'),
     'confirmSuccess' => t('yes'),
     'confirmFailure' => t('no'),
     'showStrengthIndicator' => FALSE,
-  );
+  ];
 
   if (\Drupal::config('user.settings')->get('password_strength')) {
     $password_settings['showStrengthIndicator'] = TRUE;
-    $password_settings += array(
+    $password_settings += [
       'strengthTitle' => t('Password strength:'),
       'hasWeaknesses' => t('Recommendations to make your password stronger:'),
       'tooShort' => t('Make it at least 12 characters'),
@@ -1274,7 +1274,7 @@ function user_form_process_password_confirm($element) {
       'good' => t('Good'),
       'strong' => t('Strong'),
       'username' => \Drupal::currentUser()->getUsername(),
-    );
+    ];
   }
 
   $element['#attached']['library'][] = 'user/drupal.user';
@@ -1323,77 +1323,77 @@ function user_toolbar() {
   // Add logout & user account links or login link.
   $links_cache_contexts = [];
   if ($user->isAuthenticated()) {
-    $links = array(
-      'account' => array(
+    $links = [
+      'account' => [
         'title' => t('View profile'),
         'url' => Url::fromRoute('user.page'),
-        'attributes' => array(
+        'attributes' => [
           'title' => t('User account'),
-        ),
-      ),
-      'account_edit' => array(
+        ],
+      ],
+      'account_edit' => [
         'title' => t('Edit profile'),
         'url' => Url::fromRoute('entity.user.edit_form', ['user' => $user->id()]),
-        'attributes' => array(
+        'attributes' => [
           'title' => t('Edit user account'),
-        ),
-      ),
-      'logout' => array(
+        ],
+      ],
+      'logout' => [
         'title' => t('Log out'),
         'url' => Url::fromRoute('user.logout'),
-      ),
-    );
+      ],
+    ];
     // The "Edit user account" link is per-user.
     $links_cache_contexts[] = 'user';
   }
   else {
-    $links = array(
-      'login' => array(
+    $links = [
+      'login' => [
         'title' => t('Log in'),
         'url' => Url::fromRoute('user.page'),
-      ),
-    );
+      ],
+    ];
   }
 
-  $items['user'] = array(
+  $items['user'] = [
     '#type' => 'toolbar_item',
-    'tab' => array(
+    'tab' => [
       '#type' => 'link',
       '#title' => $user->getDisplayName(),
       '#url' => Url::fromRoute('user.page'),
-      '#attributes' => array(
+      '#attributes' => [
         'title' => t('My account'),
-        'class' => array('toolbar-icon', 'toolbar-icon-user'),
-      ),
+        'class' => ['toolbar-icon', 'toolbar-icon-user'],
+      ],
       '#cache' => [
         'contexts' => [
           // Cacheable per user, because the current user's name is shown.
           'user',
         ],
       ],
-    ),
-    'tray' => array(
+    ],
+    'tray' => [
       '#heading' => t('User account actions'),
-      'user_links' => array(
+      'user_links' => [
         '#cache' => [
           // Cacheable per "authenticated or not", because the links to
           // display depend on that.
-          'contexts' => Cache::mergeContexts(array('user.roles:authenticated'), $links_cache_contexts),
+          'contexts' => Cache::mergeContexts(['user.roles:authenticated'], $links_cache_contexts),
         ],
         '#theme' => 'links__toolbar_user',
         '#links' => $links,
-        '#attributes' => array(
-          'class' => array('toolbar-menu'),
-        ),
-      ),
-    ),
+        '#attributes' => [
+          'class' => ['toolbar-menu'],
+        ],
+      ],
+    ],
     '#weight' => 100,
-    '#attached' => array(
-      'library' => array(
+    '#attached' => [
+      'library' => [
         'user/drupal.user.icons',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   return $items;
 }
@@ -1404,9 +1404,9 @@ function user_toolbar() {
 function user_logout() {
   $user = \Drupal::currentUser();
 
-  \Drupal::logger('user')->notice('Session closed for %name.', array('%name' => $user->getAccountName()));
+  \Drupal::logger('user')->notice('Session closed for %name.', ['%name' => $user->getAccountName()]);
 
-  \Drupal::moduleHandler()->invokeAll('user_logout', array($user));
+  \Drupal::moduleHandler()->invokeAll('user_logout', [$user]);
 
   // Destroy the current session, and reset $user to the anonymous user.
   // Note: In Symfony the session is intended to be destroyed with
diff --git a/core/modules/user/user.tokens.inc b/core/modules/user/user.tokens.inc
index 7f456f66141b52d3df4866f9de28cebcf16d9c93..8c02f6e6cbb7899004893a10716cb17c3530230b 100644
--- a/core/modules/user/user.tokens.inc
+++ b/core/modules/user/user.tokens.inc
@@ -13,61 +13,61 @@
  * Implements hook_token_info().
  */
 function user_token_info() {
-  $types['user'] = array(
+  $types['user'] = [
     'name' => t('Users'),
     'description' => t('Tokens related to individual user accounts.'),
     'needs-data' => 'user',
-  );
-  $types['current-user'] = array(
+  ];
+  $types['current-user'] = [
     'name' => t('Current user'),
     'description' => t('Tokens related to the currently logged in user.'),
     'type' => 'user',
-  );
+  ];
 
-  $user['uid'] = array(
+  $user['uid'] = [
     'name' => t('User ID'),
     'description' => t("The unique ID of the user account."),
-  );
-  $user['name'] = array(
+  ];
+  $user['name'] = [
     'name' => t("Deprecated: User Name"),
     'description' => t("Deprecated: Use account-name or display-name instead."),
-  );
-  $user['account-name'] = array(
+  ];
+  $user['account-name'] = [
     'name' => t("Account Name"),
     'description' => t("The login name of the user account."),
-  );
-  $user['display-name'] = array(
+  ];
+  $user['display-name'] = [
     'name' => t("Display Name"),
     'description' => t("The display name of the user account."),
-  );
-  $user['mail'] = array(
+  ];
+  $user['mail'] = [
     'name' => t("Email"),
     'description' => t("The email address of the user account."),
-  );
-  $user['url'] = array(
+  ];
+  $user['url'] = [
     'name' => t("URL"),
     'description' => t("The URL of the account profile page."),
-  );
-  $user['edit-url'] = array(
+  ];
+  $user['edit-url'] = [
     'name' => t("Edit URL"),
     'description' => t("The URL of the account edit page."),
-  );
+  ];
 
-  $user['last-login'] = array(
+  $user['last-login'] = [
     'name' => t("Last login"),
     'description' => t("The date the user last logged in to the site."),
     'type' => 'date',
-  );
-  $user['created'] = array(
+  ];
+  $user['created'] = [
     'name' => t("Created"),
     'description' => t("The date the user account was created."),
     'type' => 'date',
-  );
+  ];
 
-  return array(
+  return [
     'types' => $types,
-    'tokens' => array('user' => $user),
-  );
+    'tokens' => ['user' => $user],
+  ];
 }
 
 /**
@@ -76,7 +76,7 @@ function user_token_info() {
 function user_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
 
   $token_service = \Drupal::token();
-  $url_options = array('absolute' => TRUE);
+  $url_options = ['absolute' => TRUE];
   if (isset($options['langcode'])) {
     $url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
     $langcode = $options['langcode'];
@@ -84,7 +84,7 @@ function user_tokens($type, $tokens, array $data, array $options, BubbleableMeta
   else {
     $langcode = NULL;
   }
-  $replacements = array();
+  $replacements = [];
 
   if ($type == 'user' && !empty($data['user'])) {
     /** @var \Drupal\user\UserInterface $account */
@@ -142,18 +142,18 @@ function user_tokens($type, $tokens, array $data, array $options, BubbleableMeta
     }
 
     if ($login_tokens = $token_service->findWithPrefix($tokens, 'last-login')) {
-      $replacements += $token_service->generate('date', $login_tokens, array('date' => $account->getLastLoginTime()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $login_tokens, ['date' => $account->getLastLoginTime()], $options, $bubbleable_metadata);
     }
 
     if ($registered_tokens = $token_service->findWithPrefix($tokens, 'created')) {
-      $replacements += $token_service->generate('date', $registered_tokens, array('date' => $account->getCreatedTime()), $options, $bubbleable_metadata);
+      $replacements += $token_service->generate('date', $registered_tokens, ['date' => $account->getCreatedTime()], $options, $bubbleable_metadata);
     }
   }
 
   if ($type == 'current-user') {
     $account = User::load(\Drupal::currentUser()->id());
     $bubbleable_metadata->addCacheContexts(['user']);
-    $replacements += $token_service->generate('user', $tokens, array('user' => $account), $options, $bubbleable_metadata);
+    $replacements += $token_service->generate('user', $tokens, ['user' => $account], $options, $bubbleable_metadata);
   }
 
   return $replacements;
diff --git a/core/modules/user/user.views_execution.inc b/core/modules/user/user.views_execution.inc
index c9a3f1dbc97cb08c4cf9eba7706a15a82fcd36a9..255fbf2683868e2502cdaa599df07b5641fa6892 100644
--- a/core/modules/user/user.views_execution.inc
+++ b/core/modules/user/user.views_execution.inc
@@ -13,5 +13,5 @@
  * Allow replacement of current userid so we can cache these queries.
  */
 function user_views_query_substitutions(ViewExecutable $view) {
-  return array('***CURRENT_USER***' => \Drupal::currentUser()->id());
+  return ['***CURRENT_USER***' => \Drupal::currentUser()->id()];
 }
diff --git a/core/modules/views/src/Ajax/HighlightCommand.php b/core/modules/views/src/Ajax/HighlightCommand.php
index c19ff1b66c371da726254c3ddff95e98fc85278c..b04c0bef057105999e6d28fbe7171c1027c1edc3 100644
--- a/core/modules/views/src/Ajax/HighlightCommand.php
+++ b/core/modules/views/src/Ajax/HighlightCommand.php
@@ -32,10 +32,10 @@ public function __construct($selector) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'viewsHighlight',
       'selector' => $this->selector,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Ajax/ReplaceTitleCommand.php b/core/modules/views/src/Ajax/ReplaceTitleCommand.php
index 45972c3c129374faa04d05a2d04b0aa40dadec69..90e462abfa3491d8697419043c765ba8816bda10 100644
--- a/core/modules/views/src/Ajax/ReplaceTitleCommand.php
+++ b/core/modules/views/src/Ajax/ReplaceTitleCommand.php
@@ -32,10 +32,10 @@ public function __construct($title) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'viewsReplaceTitle',
       'selector' => $this->title,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Ajax/ScrollTopCommand.php b/core/modules/views/src/Ajax/ScrollTopCommand.php
index a303ffbbe9eec8e1002c4d8c3eab10ca4339122c..bf2db4e7c9187a7e4214965f6836062ba1a840ca 100644
--- a/core/modules/views/src/Ajax/ScrollTopCommand.php
+++ b/core/modules/views/src/Ajax/ScrollTopCommand.php
@@ -32,10 +32,10 @@ public function __construct($selector) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'viewsScrollTop',
       'selector' => $this->selector,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Ajax/ShowButtonsCommand.php b/core/modules/views/src/Ajax/ShowButtonsCommand.php
index f5d7dceb7bd871e6dd44d7ba94345da0e6566e77..aecd6bd63a9789680256b2255468c26b962908c5 100644
--- a/core/modules/views/src/Ajax/ShowButtonsCommand.php
+++ b/core/modules/views/src/Ajax/ShowButtonsCommand.php
@@ -33,10 +33,10 @@ public function __construct($changed) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'viewsShowButtons',
       'changed' => $this->changed,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Ajax/TriggerPreviewCommand.php b/core/modules/views/src/Ajax/TriggerPreviewCommand.php
index 080bc0247b38a3bb03692baa372d693b1f4078cf..64e76cb83ee9d8d3dbbc70a088f54397684b8fe2 100644
--- a/core/modules/views/src/Ajax/TriggerPreviewCommand.php
+++ b/core/modules/views/src/Ajax/TriggerPreviewCommand.php
@@ -15,9 +15,9 @@ class TriggerPreviewCommand implements CommandInterface {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'viewsTriggerPreview',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Analyzer.php b/core/modules/views/src/Analyzer.php
index 2a3334292f1474b093c5e75e5c177b098e3c1880..3688fdaf43b0b67743e94c4f4bc9f605b32c1638 100644
--- a/core/modules/views/src/Analyzer.php
+++ b/core/modules/views/src/Analyzer.php
@@ -44,7 +44,7 @@ public function __construct(ModuleHandlerInterface $module_handler) {
    */
   public function getMessages(ViewExecutable $view) {
     $view->initDisplay();
-    $messages = $this->moduleHandler->invokeAll('views_analyze', array($view));
+    $messages = $this->moduleHandler->invokeAll('views_analyze', [$view]);
 
     return $messages;
   }
@@ -57,13 +57,13 @@ public function getMessages(ViewExecutable $view) {
    */
   public function formatMessages(array $messages) {
     if (empty($messages)) {
-      $messages = array(static::formatMessage(t('View analysis can find nothing to report.'), 'ok'));
+      $messages = [static::formatMessage(t('View analysis can find nothing to report.'), 'ok')];
     }
 
-    $types = array('ok' => array(), 'warning' => array(), 'error' => array());
+    $types = ['ok' => [], 'warning' => [], 'error' => []];
     foreach ($messages as $message) {
       if (empty($types[$message['type']])) {
-        $types[$message['type']] = array();
+        $types[$message['type']] = [];
       }
       $types[$message['type']][] = $message['message'];
     }
@@ -73,10 +73,10 @@ public function formatMessages(array $messages) {
       $type .= ' messages';
       $message = '';
       if (count($messages) > 1) {
-        $item_list = array(
+        $item_list = [
           '#theme' => 'item_list',
           '#items' => $messages,
-        );
+        ];
         $message = drupal_render($item_list);
       }
       elseif ($messages) {
@@ -116,7 +116,7 @@ public function formatMessages(array $messages) {
    *   A single formatted message, consisting of a key message and a key type.
    */
   static function formatMessage($message, $type = 'error') {
-    return array('message' => $message, 'type' => $type);
+    return ['message' => $message, 'type' => $type];
   }
 
 }
diff --git a/core/modules/views/src/Controller/ViewAjaxController.php b/core/modules/views/src/Controller/ViewAjaxController.php
index 7993d2a58506025e2db4429f9be972c8505787be..c40cf857660712c67092cfb1d9c661b92cf3599f 100644
--- a/core/modules/views/src/Controller/ViewAjaxController.php
+++ b/core/modules/views/src/Controller/ViewAjaxController.php
@@ -114,7 +114,7 @@ public function ajaxView(Request $request) {
     $display_id = $request->request->get('view_display_id');
     if (isset($name) && isset($display_id)) {
       $args = $request->request->get('view_args');
-      $args = isset($args) && $args !== '' ? explode('/', $args) : array();
+      $args = isset($args) && $args !== '' ? explode('/', $args) : [];
 
       // Arguments can be empty, make sure they are passed on as NULL so that
       // argument validation is not triggered.
@@ -132,7 +132,7 @@ public function ajaxView(Request $request) {
 
       // Remove all of this stuff from the query of the request so it doesn't
       // end up in pagers and tablesort URLs.
-      foreach (array('view_name', 'view_display_id', 'view_args', 'view_path', 'view_dom_id', 'pager_element', 'view_base_path', AjaxResponseSubscriber::AJAX_REQUEST_PARAMETER) as $key) {
+      foreach (['view_name', 'view_display_id', 'view_args', 'view_path', 'view_dom_id', 'pager_element', 'view_base_path', AjaxResponseSubscriber::AJAX_REQUEST_PARAMETER] as $key) {
         $request->query->remove($key);
         $request->request->remove($key);
       }
diff --git a/core/modules/views/src/DisplayPluginCollection.php b/core/modules/views/src/DisplayPluginCollection.php
index 0b692b115d681d39cad5b4b3bcfa22652eb28c64..7c3c736fad97ca76a8b310f44e42a75d512ab2b4 100644
--- a/core/modules/views/src/DisplayPluginCollection.php
+++ b/core/modules/views/src/DisplayPluginCollection.php
@@ -80,7 +80,7 @@ protected function initializePlugin($display_id) {
     // display plugin isn't found.
     catch (PluginException $e) {
       $message = $e->getMessage();
-      drupal_set_message(t('@message', array('@message' => $message)), 'warning');
+      drupal_set_message(t('@message', ['@message' => $message]), 'warning');
     }
 
     // If no plugin instance has been created, return NULL.
diff --git a/core/modules/views/src/Element/View.php b/core/modules/views/src/Element/View.php
index b02e260fe7181f43f6edd22616028fff2d7598ab..43d1058c8761f7f4f4ce2e5f14a4ef6fb35c8410 100644
--- a/core/modules/views/src/Element/View.php
+++ b/core/modules/views/src/Element/View.php
@@ -17,16 +17,16 @@ class View extends RenderElement {
    */
   public function getInfo() {
     $class = get_class($this);
-    return array(
-      '#pre_render' => array(
-        array($class, 'preRenderViewElement'),
-      ),
+    return [
+      '#pre_render' => [
+        [$class, 'preRenderViewElement'],
+      ],
       '#name' => NULL,
       '#display_id' => 'default',
-      '#arguments' => array(),
+      '#arguments' => [],
       '#embed' => TRUE,
       '#cache' => [],
-    );
+    ];
   }
 
   /**
@@ -92,7 +92,7 @@ public static function preRenderViewElement($element) {
       }
       if (empty($view->display_handler->getPluginDefinition()['returns_response'])) {
         $element['#attributes']['class'][] = 'views-element-container';
-        $element['#theme_wrappers'] = array('container');
+        $element['#theme_wrappers'] = ['container'];
       }
     }
 
diff --git a/core/modules/views/src/Entity/Render/EntityTranslationRenderTrait.php b/core/modules/views/src/Entity/Render/EntityTranslationRenderTrait.php
index e08ef04d301e4c8b5de3c4f27fda46fd465285b6..8fbc191d149f83de2659988b669682dbc0fa3aee 100644
--- a/core/modules/views/src/Entity/Render/EntityTranslationRenderTrait.php
+++ b/core/modules/views/src/Entity/Render/EntityTranslationRenderTrait.php
@@ -30,10 +30,10 @@ protected function getEntityTranslationRenderer() {
       $view = $this->getView();
       $rendering_language = $view->display_handler->getOption('rendering_language');
       $langcode = NULL;
-      $dynamic_renderers = array(
+      $dynamic_renderers = [
         '***LANGUAGE_entity_translation***' => 'TranslationLanguageRenderer',
         '***LANGUAGE_entity_default***' => 'DefaultLanguageRenderer',
-      );
+      ];
       if (isset($dynamic_renderers[$rendering_language])) {
         // Dynamic language set based on result rows or instance defaults.
         $renderer = $dynamic_renderers[$rendering_language];
diff --git a/core/modules/views/src/Entity/View.php b/core/modules/views/src/Entity/View.php
index f75badb027cc4a2ef6f6550371e97158e78ca3f9..a8d8d44b89b5394751039943047227058e384624 100644
--- a/core/modules/views/src/Entity/View.php
+++ b/core/modules/views/src/Entity/View.php
@@ -93,7 +93,7 @@ class View extends ConfigEntityBase implements ViewEntityInterface {
    *
    * @var array
    */
-  protected $display = array();
+  protected $display = [];
 
   /**
    * The name of the base field to use.
@@ -184,15 +184,15 @@ public function addDisplay($plugin_id = 'page', $title = NULL, $id = NULL) {
       }
     }
 
-    $display_options = array(
+    $display_options = [
       'display_plugin' => $plugin_id,
       'id' => $id,
       // Cast the display title to a string since it is an object.
       // @see \Drupal\Core\StringTranslation\TranslatableMarkup
       'display_title' => (string) $title,
       'position' => $id === 'default' ? 0 : count($this->display),
-      'display_options' => array(),
-    );
+      'display_options' => [],
+    ];
 
     // Add the display options to the view.
     $this->display[$id] = $display_options;
@@ -413,17 +413,17 @@ public static function preCreate(EntityStorageInterface $storage, array &$values
 
     // If there is no information about displays available add at least the
     // default display.
-    $values += array(
-      'display' => array(
-        'default' => array(
+    $values += [
+      'display' => [
+        'default' => [
           'display_plugin' => 'default',
           'id' => 'default',
           'display_title' => 'Master',
           'position' => 0,
-          'display_options' => array(),
-        ),
-      )
-    );
+          'display_options' => [],
+        ],
+      ]
+    ];
   }
 
   /**
@@ -468,15 +468,15 @@ public static function postDelete(EntityStorageInterface $storage, array $entiti
    * {@inheritdoc}
    */
   public function mergeDefaultDisplaysOptions() {
-    $displays = array();
+    $displays = [];
     foreach ($this->get('display') as $key => $options) {
-      $options += array(
-        'display_options' => array(),
+      $options += [
+        'display_options' => [],
         'display_plugin' => NULL,
         'id' => NULL,
         'display_title' => '',
         'position' => NULL,
-      );
+      ];
       // Add the defaults for the display.
       $displays[$key] = $options;
     }
diff --git a/core/modules/views/src/EntityViewsData.php b/core/modules/views/src/EntityViewsData.php
index 61def5acd49c3a171745619b9331c89e0f620a87..1a65b1c8a26e0671cdf61be030587d0d4fbcaced 100644
--- a/core/modules/views/src/EntityViewsData.php
+++ b/core/modules/views/src/EntityViewsData.php
@@ -161,28 +161,28 @@ public function getViewsData() {
 
     if ($label_key = $this->entityType->getKey('label')) {
       if ($data_table) {
-        $data[$views_base_table]['table']['base']['defaults'] = array(
+        $data[$views_base_table]['table']['base']['defaults'] = [
           'field' => $label_key,
           'table' => $data_table,
-        );
+        ];
       }
       else {
-        $data[$views_base_table]['table']['base']['defaults'] = array(
+        $data[$views_base_table]['table']['base']['defaults'] = [
           'field' => $label_key,
-        );
+        ];
       }
     }
 
     // Entity types must implement a list_builder in order to use Views'
     // entity operations field.
     if ($this->entityType->hasListBuilderClass()) {
-      $data[$base_table]['operations'] = array(
-        'field' => array(
+      $data[$base_table]['operations'] = [
+        'field' => [
           'title' => $this->t('Operations links'),
           'help' => $this->t('Provides links to perform entity operations.'),
           'id' => 'entity_operations',
-        ),
-      );
+        ],
+      ];
     }
 
     if ($this->entityType->hasViewBuilderClass()) {
@@ -215,26 +215,26 @@ public function getViewsData() {
         $views_revision_base_table = $revision_data_table;
       }
       $data[$views_revision_base_table]['table']['entity revision'] = TRUE;
-      $data[$views_revision_base_table]['table']['base'] = array(
+      $data[$views_revision_base_table]['table']['base'] = [
         'field' => $revision_field,
-        'title' => $this->t('@entity_type revisions', array('@entity_type' => $this->entityType->getLabel())),
-      );
+        'title' => $this->t('@entity_type revisions', ['@entity_type' => $this->entityType->getLabel()]),
+      ];
       // Join the revision table to the base table.
-      $data[$views_revision_base_table]['table']['join'][$views_base_table] = array(
+      $data[$views_revision_base_table]['table']['join'][$views_base_table] = [
         'left_field' => $revision_field,
         'field' => $revision_field,
         'type' => 'INNER',
-      );
+      ];
 
       if ($revision_data_table) {
         $data[$revision_data_table]['table']['group'] = $this->t('@entity_type revision', ['@entity_type' => $this->entityType->getLabel()]);
         $data[$revision_data_table]['table']['entity revision'] = TRUE;
 
-        $data[$revision_table]['table']['join'][$revision_data_table] = array(
+        $data[$revision_table]['table']['join'][$revision_data_table] = [
           'left_field' => $revision_field,
           'field' => $revision_field,
           'type' => 'INNER',
-        );
+        ];
       }
     }
 
@@ -404,7 +404,7 @@ protected function mapFieldDefinition($table, $field_name, FieldDefinitionInterf
    *   The modified views data field definition.
    */
   protected function mapSingleFieldViewsData($table, $field_name, $field_type, $column_name, $column_type, $first, FieldDefinitionInterface $field_definition) {
-    $views_field = array();
+    $views_field = [];
 
     // Provide a nicer, less verbose label for the first column within a field.
     // @todo Introduce concept of the "main" column for a field, rather than
diff --git a/core/modules/views/src/EventSubscriber/RouteSubscriber.php b/core/modules/views/src/EventSubscriber/RouteSubscriber.php
index c209ddbaf117541cafd42eafe6c30ef42933e30a..c2b9ea89135e3571332e934988edc0d9c3c94aa3 100644
--- a/core/modules/views/src/EventSubscriber/RouteSubscriber.php
+++ b/core/modules/views/src/EventSubscriber/RouteSubscriber.php
@@ -49,7 +49,7 @@ class RouteSubscriber extends RouteSubscriberBase {
    *
    * @var array
    */
-  protected $viewRouteNames = array();
+  protected $viewRouteNames = [];
 
   /**
    * Constructs a \Drupal\views\EventSubscriber\RouteSubscriber instance.
@@ -76,7 +76,7 @@ public function reset() {
    */
   public static function getSubscribedEvents() {
     $events = parent::getSubscribedEvents();
-    $events[RoutingEvents::FINISHED] = array('routeRebuildFinished');
+    $events[RoutingEvents::FINISHED] = ['routeRebuildFinished'];
     // Ensure to run after the entity resolver subscriber
     // @see \Drupal\Core\EventSubscriber\EntityRouteAlterSubscriber
     $events[RoutingEvents::ALTER] = ['onAlterRoutes', -175];
@@ -89,7 +89,7 @@ public static function getSubscribedEvents() {
    */
   protected function getViewsDisplayIDsWithRoute() {
     if (!isset($this->viewsDisplayPairs)) {
-      $this->viewsDisplayPairs = array();
+      $this->viewsDisplayPairs = [];
 
       // @todo Convert this method to some service.
       $views = $this->getApplicableViews();
diff --git a/core/modules/views/src/ExposedFormCache.php b/core/modules/views/src/ExposedFormCache.php
index cb67a9ba075d77d03cab3c3b5c506f0f1f464842..f60cc71c1273d25d3660e64e8c6c578c7a9f7bd3 100644
--- a/core/modules/views/src/ExposedFormCache.php
+++ b/core/modules/views/src/ExposedFormCache.php
@@ -14,7 +14,7 @@ class ExposedFormCache {
    *
    * @var array
    */
-  protected $cache = array();
+  protected $cache = [];
 
   /**
    * Save the Views exposed form for later use.
@@ -56,7 +56,7 @@ public function getForm($view_id, $display_id) {
    * Rests the form cache.
    */
   public function reset() {
-    $this->cache = array();
+    $this->cache = [];
   }
 
 }
diff --git a/core/modules/views/src/Form/ViewsExposedForm.php b/core/modules/views/src/Form/ViewsExposedForm.php
index bacd554954ee1ed1114d830f90d3fc935e7c2717..44e7ec4b0f3b7fddd7d2b515504fdace23e58617 100644
--- a/core/modules/views/src/Form/ViewsExposedForm.php
+++ b/core/modules/views/src/Form/ViewsExposedForm.php
@@ -52,10 +52,10 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     // Don't show the form when batch operations are in progress.
     if ($batch = batch_get() && isset($batch['current_set'])) {
-      return array(
+      return [
         // Set the theme callback to be nothing to avoid errors in template_preprocess_views_exposed_form().
         '#theme' => '',
-      );
+      ];
     }
 
     // Make sure that we validate because this form might be submitted
@@ -74,7 +74,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       return $cache;
     }
 
-    $form['#info'] = array();
+    $form['#info'] = [];
 
     // Go through each handler and let it generate its exposed widget.
     foreach ($view->display_handler->handlers as $type => $value) {
@@ -100,16 +100,16 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       }
     }
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions'
-    );
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions']['submit'] = [
       // Prevent from showing up in \Drupal::request()->query.
       '#name' => '',
       '#type' => 'submit',
       '#value' => $this->t('Apply'),
       '#id' => Html::getUniqueId('edit-submit-' . $view->storage->id()),
-    );
+    ];
 
     $form['#action'] = $view->hasUrl() ? $view->getUrl()->toString() : Url::fromRoute('<current>')->toString();
     $form['#theme'] = $view->buildThemeFunctions('views_exposed_form');
@@ -131,7 +131,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
   public function validateForm(array &$form, FormStateInterface $form_state) {
     $view = $form_state->get('view');
 
-    foreach (array('field', 'filter') as $type) {
+    foreach (['field', 'filter'] as $type) {
       /** @var \Drupal\views\Plugin\views\ViewsHandlerInterface[] $handlers */
       $handlers = &$view->$type;
       foreach ($handlers as $key => $handler) {
@@ -148,9 +148,9 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     // Form input keys that will not be included in $view->exposed_raw_data.
-    $exclude = array('submit', 'form_build_id', 'form_id', 'form_token', 'exposed_form_plugin', 'reset');
+    $exclude = ['submit', 'form_build_id', 'form_id', 'form_token', 'exposed_form_plugin', 'reset'];
     $values = $form_state->getValues();
-    foreach (array('field', 'filter') as $type) {
+    foreach (['field', 'filter'] as $type) {
       /** @var \Drupal\views\Plugin\views\ViewsHandlerInterface[] $handlers */
       $handlers = &$form_state->get('view')->$type;
       foreach ($handlers as $key => $info) {
@@ -169,7 +169,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $view->exposed_data = $values;
     $view->exposed_raw_input = [];
 
-    $exclude = array('submit', 'form_build_id', 'form_id', 'form_token', 'exposed_form_plugin', 'reset');
+    $exclude = ['submit', 'form_build_id', 'form_id', 'form_token', 'exposed_form_plugin', 'reset'];
     /** @var \Drupal\views\Plugin\views\exposed_form\ExposedFormPluginBase $exposed_form_plugin */
     $exposed_form_plugin = $view->display_handler->getPlugin('exposed_form');
     $exposed_form_plugin->exposedFormSubmit($form, $form_state, $exclude);
diff --git a/core/modules/views/src/Form/ViewsForm.php b/core/modules/views/src/Form/ViewsForm.php
index b124d653d640945e7aa7bdebfe5272be030db3cf..575b92313fc23627480b0d5c630e6a7b98dd4a71 100644
--- a/core/modules/views/src/Form/ViewsForm.php
+++ b/core/modules/views/src/Form/ViewsForm.php
@@ -151,19 +151,19 @@ public function buildForm(array $form, FormStateInterface $form_state, ViewExecu
     // Add the base form ID.
     $form_state->addBuildInfo('base_form_id', $this->getBaseFormId());
 
-    $form = array();
+    $form = [];
 
     $query = $this->requestStack->getCurrentRequest()->query->all();
-    $query = UrlHelper::filterQueryParameters($query, array(), '');
+    $query = UrlHelper::filterQueryParameters($query, [], '');
 
-    $options = array('query' => $query);
+    $options = ['query' => $query];
     $form['#action'] = $view->hasUrl() ? $view->getUrl()->setOptions($options)->toString() : Url::fromRoute('<current>')->setOptions($options)->toString();
     // Tell the preprocessor whether it should hide the header, footer, pager,
     // etc.
-    $form['show_view_elements'] = array(
+    $form['show_view_elements'] = [
       '#type' => 'value',
       '#value' => ($step == 'views_form_views_form') ? TRUE : FALSE,
-    );
+    ];
 
     $form_object = $this->getFormObject($form_state);
     $form += $form_object->buildForm($form, $form_state, $view, $output);
diff --git a/core/modules/views/src/Form/ViewsFormMainForm.php b/core/modules/views/src/Form/ViewsFormMainForm.php
index fb8818ae7166016362d69d3a188606f82ff9f2a1..da56f4916980f2c63d8101cc10608e70308ec0bd 100644
--- a/core/modules/views/src/Form/ViewsFormMainForm.php
+++ b/core/modules/views/src/Form/ViewsFormMainForm.php
@@ -30,15 +30,15 @@ public function buildForm(array $form, FormStateInterface $form_state, ViewExecu
     // (below the exposed widgets).
     $form['output']['#weight'] = 50;
 
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions',
-    );
-    $form['actions']['submit'] = array(
+    ];
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => t('Save'),
-    );
+    ];
 
-    $substitutions = array();
+    $substitutions = [];
     foreach ($view->field as $field_name => $field) {
       $form_element_name = $field_name;
       if (method_exists($field, 'form_element_name')) {
@@ -71,11 +71,11 @@ public function buildForm(array $form, FormStateInterface $form_state, ViewExecu
             $form_element_row_id = $row_id;
           }
 
-          $substitutions[] = array(
+          $substitutions[] = [
             'placeholder' => '<!--form-item-' . $form_element_name . '--' . $form_element_row_id . '-->',
             'field_name' => $form_element_name,
             'row_id' => $form_element_row_id,
-          );
+          ];
         }
       }
     }
@@ -89,10 +89,10 @@ public function buildForm(array $form, FormStateInterface $form_state, ViewExecu
       }
     }
 
-    $form['#substitutions'] = array(
+    $form['#substitutions'] = [
       '#type' => 'value',
       '#value' => $substitutions,
-    );
+    ];
 
     return $form;
   }
@@ -111,7 +111,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
     }
 
     // Call the validate method on every area handler that has it.
-    foreach (array('header', 'footer') as $area) {
+    foreach (['header', 'footer'] as $area) {
       foreach ($view->{$area} as $area_handler) {
         if (method_exists($area_handler, 'viewsFormValidate')) {
           $area_handler->viewsFormValidate($form, $form_state);
@@ -134,7 +134,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     }
 
     // Call the submit method on every area handler that has it.
-    foreach (array('header', 'footer') as $area) {
+    foreach (['header', 'footer'] as $area) {
       foreach ($view->{$area} as $area_handler) {
         if (method_exists($area_handler, 'viewsFormSubmit')) {
           $area_handler->viewsFormSubmit($form, $form_state);
diff --git a/core/modules/views/src/ManyToOneHelper.php b/core/modules/views/src/ManyToOneHelper.php
index d9ed2ca7f9bf4eb0d12e4b81ac221a6664032687..51d2b4f48148f98113afab78f434da74c4a24b78 100644
--- a/core/modules/views/src/ManyToOneHelper.php
+++ b/core/modules/views/src/ManyToOneHelper.php
@@ -26,17 +26,17 @@ function __construct($handler) {
   }
 
   public static function defineOptions(&$options) {
-    $options['reduce_duplicates'] = array('default' => FALSE);
+    $options['reduce_duplicates'] = ['default' => FALSE];
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['reduce_duplicates'] = array(
+    $form['reduce_duplicates'] = [
       '#type' => 'checkbox',
       '#title' => t('Reduce duplicates'),
       '#description' => t("This filter can cause items that have more than one of the selected options to appear as duplicate results. If this filter causes duplicate results to occur, this checkbox can reduce those duplicates; however, the more terms it has to search for, the less performant the query will be, so use this with caution. Shouldn't be set on single-value fields, as it may cause values to disappear from display, if used on an incompatible field."),
       '#default_value' => !empty($this->handler->options['reduce_duplicates']),
       '#weight' => 4,
-    );
+    ];
   }
 
   /**
@@ -134,14 +134,14 @@ public function summaryJoin() {
     else {
       if (!empty($view->many_to_one_tables[$field])) {
         foreach ($view->many_to_one_tables[$field] as $value) {
-          $join->extra = array(
-            array(
+          $join->extra = [
+            [
               'field' => $this->handler->realField,
               'operator' => '!=',
               'value' => $value,
               'numeric' => !empty($this->definition['numeric']),
-            ),
-          );
+            ],
+          ];
         }
       }
       return $this->addTable($join);
@@ -173,14 +173,14 @@ public function ensureMyTable() {
           $join->type = 'LEFT';
           if (!empty($this->handler->view->many_to_one_tables[$field])) {
             foreach ($this->handler->view->many_to_one_tables[$field] as $value) {
-              $join->extra = array(
-                array(
+              $join->extra = [
+                [
                   'field' => $this->handler->realField,
                   'operator' => '!=',
                   'value' => $value,
                   'numeric' => !empty($this->handler->definition['numeric']),
-                ),
-              );
+                ],
+              ];
             }
           }
 
@@ -194,19 +194,19 @@ public function ensureMyTable() {
       // We do one join per selected value.
       if ($this->handler->operator != 'not') {
         // Clone the join for each table:
-        $this->handler->tableAliases = array();
+        $this->handler->tableAliases = [];
         foreach ($this->handler->value as $value) {
           $join = $this->getJoin();
           if ($this->handler->operator == 'and') {
             $join->type = 'INNER';
           }
-          $join->extra = array(
-            array(
+          $join->extra = [
+            [
               'field' => $this->handler->realField,
               'value' => $value,
               'numeric' => !empty($this->handler->definition['numeric']),
-            ),
-          );
+            ],
+          ];
 
           // The table alias needs to be unique to this value across the
           // multiple times the filter or argument is called by the view.
@@ -230,14 +230,14 @@ public function ensureMyTable() {
       else {
         $join = $this->getJoin();
         $join->type = 'LEFT';
-        $join->extra = array();
+        $join->extra = [];
         $join->extraOperator = 'OR';
         foreach ($this->handler->value as $value) {
-          $join->extra[] = array(
+          $join->extra[] = [
             'field' => $this->handler->realField,
             'value' => $value,
             'numeric' => !empty($this->handler->definition['numeric']),
-          );
+          ];
         }
 
         $this->handler->tableAlias = $this->addTable($join);
@@ -297,9 +297,9 @@ public function addFilter() {
         else {
           $operator = "$operator $placeholder";
         }
-        $placeholders = array(
+        $placeholders = [
           $placeholder => $value,
-        );
+        ];
         $this->handler->query->addWhereExpression($options['group'], "$field $operator", $placeholders);
       }
       else {
@@ -311,7 +311,7 @@ public function addFilter() {
             $this->handler->query->addWhereExpression(0, "$field $operator");
           }
           else {
-            $this->handler->query->addWhereExpression(0, "$field $operator($placeholder)", array($placeholder => $value));
+            $this->handler->query->addWhereExpression(0, "$field $operator($placeholder)", [$placeholder => $value]);
           }
         }
         else {
@@ -319,7 +319,7 @@ public function addFilter() {
             $this->handler->query->addWhereExpression(0, "$field $operator");
           }
           else {
-            $this->handler->query->addWhereExpression(0, "$field $operator $placeholder", array($placeholder => $value));
+            $this->handler->query->addWhereExpression(0, "$field $operator $placeholder", [$placeholder => $value]);
           }
         }
       }
diff --git a/core/modules/views/src/Plugin/Block/ViewsBlock.php b/core/modules/views/src/Plugin/Block/ViewsBlock.php
index 34116fd55024b2b0e59d8fa2406395aefccc9baf..34738cddd4d45cba0fda6e1bb2d11fceb284869c 100644
--- a/core/modules/views/src/Plugin/Block/ViewsBlock.php
+++ b/core/modules/views/src/Plugin/Block/ViewsBlock.php
@@ -74,7 +74,7 @@ public function build() {
       return $output;
     }
 
-    return array();
+    return [];
   }
 
   /**
@@ -117,7 +117,7 @@ public function blockForm($form, FormStateInterface $form_state) {
       return $this->view->display_handler->blockForm($this, $form, $form_state);
     }
 
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/Block/ViewsBlockBase.php b/core/modules/views/src/Plugin/Block/ViewsBlockBase.php
index 4a814d7511f3e70e6de3ff5a801c11a72dfc1037..4e3020ca0ab09d9f8d9829e3c6690e3cf8d8ee18 100644
--- a/core/modules/views/src/Plugin/Block/ViewsBlockBase.php
+++ b/core/modules/views/src/Plugin/Block/ViewsBlockBase.php
@@ -102,7 +102,7 @@ protected function blockAccess(AccountInterface $account) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array('views_label' => '');
+    return ['views_label' => ''];
   }
 
   /**
@@ -122,39 +122,39 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $form['#pre_render'][] = '\Drupal\views\Plugin\views\PluginBase::preRenderAddFieldsetMarkup';
 
     // Allow to override the label on the actual page.
-    $form['views_label_checkbox'] = array(
+    $form['views_label_checkbox'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Override title'),
       '#default_value' => !empty($this->configuration['views_label']),
-    );
+    ];
 
-    $form['views_label_fieldset'] = array(
+    $form['views_label_fieldset'] = [
       '#type' => 'fieldset',
-      '#states' => array(
-        'visible' => array(
-          array(
-            ':input[name="settings[views_label_checkbox]"]' => array('checked' => TRUE),
-          ),
-        ),
-      ),
-    );
-
-    $form['views_label'] = array(
+      '#states' => [
+        'visible' => [
+          [
+            ':input[name="settings[views_label_checkbox]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ],
+    ];
+
+    $form['views_label'] = [
       '#title' => $this->t('Title'),
       '#type' => 'textfield',
       '#default_value' => $this->configuration['views_label'] ?: $this->view->getTitle(),
-      '#states' => array(
-        'visible' => array(
-          array(
-            ':input[name="settings[views_label_checkbox]"]' => array('checked' => TRUE),
-          ),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          [
+            ':input[name="settings[views_label_checkbox]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ],
       '#fieldset' => 'views_label_fieldset',
-    );
+    ];
 
     if ($this->view->storage->access('edit') && \Drupal::moduleHandler()->moduleExists('views_ui')) {
-      $form['views_label']['#description'] = $this->t('Changing the title here means it cannot be dynamically altered anymore. (Try changing it directly in <a href=":url">@name</a>.)', array(':url' => \Drupal::url('entity.view.edit_display_form', array('view' => $this->view->storage->id(), 'display_id' => $this->displayID)), '@name' => $this->view->storage->label()));
+      $form['views_label']['#description'] = $this->t('Changing the title here means it cannot be dynamically altered anymore. (Try changing it directly in <a href=":url">@name</a>.)', [':url' => \Drupal::url('entity.view.edit_display_form', ['view' => $this->view->storage->id(), 'display_id' => $this->displayID]), '@name' => $this->view->storage->label()]);
     }
     else {
       $form['views_label']['#description'] = $this->t('Changing the title here means it cannot be dynamically altered anymore.');
@@ -194,7 +194,7 @@ protected function addContextualLinks(&$output, $block_type = 'block') {
       // array, so if the block contains a string of already-rendered markup,
       // convert it to an array.
       if (is_string($output)) {
-        $output = array('#markup' => $output);
+        $output = ['#markup' => $output];
       }
 
       // views_add_contextual_links() needs the following information in
diff --git a/core/modules/views/src/Plugin/Derivative/DefaultWizardDeriver.php b/core/modules/views/src/Plugin/Derivative/DefaultWizardDeriver.php
index 072d692be940158957ac8ae8ead74f5ef2c12780..f6a045cf32dfa4eb25800225c49c41172c85941f 100644
--- a/core/modules/views/src/Plugin/Derivative/DefaultWizardDeriver.php
+++ b/core/modules/views/src/Plugin/Derivative/DefaultWizardDeriver.php
@@ -17,16 +17,16 @@ class DefaultWizardDeriver extends DeriverBase {
   public function getDerivativeDefinitions($base_plugin_definition) {
     $views_data = Views::viewsData();
     $base_tables = array_keys($views_data->fetchBaseTables());
-    $this->derivatives = array();
+    $this->derivatives = [];
     foreach ($base_tables as $table) {
       $views_info = $views_data->get($table);
       if (empty($views_info['table']['wizard_id'])) {
-        $this->derivatives[$table] = array(
+        $this->derivatives[$table] = [
           'id' => 'standard',
           'base_table' => $table,
           'title' => $views_info['table']['base']['title'],
           'class' => 'Drupal\views\Plugin\views\wizard\Standard'
-        );
+        ];
       }
     }
     return parent::getDerivativeDefinitions($base_plugin_definition);
diff --git a/core/modules/views/src/Plugin/Derivative/ViewsBlock.php b/core/modules/views/src/Plugin/Derivative/ViewsBlock.php
index c092a28ddac8285dc22f619795e31984bc85c897..f4da73d4bd9a3d9d0caf813cfb28f90d959f086f 100644
--- a/core/modules/views/src/Plugin/Derivative/ViewsBlock.php
+++ b/core/modules/views/src/Plugin/Derivative/ViewsBlock.php
@@ -19,7 +19,7 @@ class ViewsBlock implements ContainerDeriverInterface {
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * The base plugin ID.
@@ -101,15 +101,15 @@ public function getDerivativeDefinitions($base_plugin_definition) {
             }
           }
 
-          $this->derivatives[$delta] = array(
+          $this->derivatives[$delta] = [
             'category' => $display->getOption('block_category'),
             'admin_label' => $admin_label,
-            'config_dependencies' => array(
-              'config' => array(
+            'config_dependencies' => [
+              'config' => [
                 $view->getConfigDependencyName(),
-              ),
-            ),
-          );
+              ],
+            ],
+          ];
 
           // Look for arguments and expose them as context.
           foreach ($display->getHandlers('argument') as $argument_name => $argument) {
diff --git a/core/modules/views/src/Plugin/Derivative/ViewsEntityArgumentValidator.php b/core/modules/views/src/Plugin/Derivative/ViewsEntityArgumentValidator.php
index 2343c9d515edd0dc59eb8370b0598fb7fe9c1f32..539eb47987228a055798502b0e70a6dd4497731f 100644
--- a/core/modules/views/src/Plugin/Derivative/ViewsEntityArgumentValidator.php
+++ b/core/modules/views/src/Plugin/Derivative/ViewsEntityArgumentValidator.php
@@ -38,7 +38,7 @@ class ViewsEntityArgumentValidator extends DeriverBase implements ContainerDeriv
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * Constructs an ViewsEntityArgumentValidator object.
@@ -72,16 +72,16 @@ public static function create(ContainerInterface $container, $base_plugin_id) {
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
     $entity_types = $this->entityManager->getDefinitions();
-    $this->derivatives = array();
+    $this->derivatives = [];
     foreach ($entity_types as $entity_type_id => $entity_type) {
-      $this->derivatives[$entity_type_id] = array(
+      $this->derivatives[$entity_type_id] = [
         'id' => 'entity:' . $entity_type_id,
         'provider' => 'views',
         'title' => $entity_type->getLabel(),
-        'help' => $this->t('Validate @label', array('@label' => $entity_type->getLabel())),
+        'help' => $this->t('Validate @label', ['@label' => $entity_type->getLabel()]),
         'entity_type' => $entity_type_id,
         'class' => $base_plugin_definition['class'],
-      );
+      ];
     }
 
     return $this->derivatives;
diff --git a/core/modules/views/src/Plugin/Derivative/ViewsEntityRow.php b/core/modules/views/src/Plugin/Derivative/ViewsEntityRow.php
index 6b36c083989b2e72ea437a8ed415243f7e2b4c43..67e7c33fd629823ef5efc33a086f297916ea6bd7 100644
--- a/core/modules/views/src/Plugin/Derivative/ViewsEntityRow.php
+++ b/core/modules/views/src/Plugin/Derivative/ViewsEntityRow.php
@@ -21,7 +21,7 @@ class ViewsEntityRow implements ContainerDeriverInterface {
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * The base plugin ID that the derivative is for.
@@ -89,16 +89,16 @@ public function getDerivativeDefinitions($base_plugin_definition) {
     foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
       // Just add support for entity types which have a views integration.
       if (($base_table = $entity_type->getBaseTable()) && $this->viewsData->get($base_table) && $this->entityManager->hasHandler($entity_type_id, 'view_builder')) {
-        $this->derivatives[$entity_type_id] = array(
+        $this->derivatives[$entity_type_id] = [
           'id' => 'entity:' . $entity_type_id,
           'provider' => 'views',
           'title' => $entity_type->getLabel(),
-          'help' => t('Display the @label', array('@label' => $entity_type->getLabel())),
-          'base' => array($entity_type->getDataTable() ?: $entity_type->getBaseTable()),
+          'help' => t('Display the @label', ['@label' => $entity_type->getLabel()]),
+          'base' => [$entity_type->getDataTable() ?: $entity_type->getBaseTable()],
           'entity_type' => $entity_type_id,
-          'display_types' => array('normal'),
+          'display_types' => ['normal'],
           'class' => $base_plugin_definition['class'],
-        );
+        ];
       }
     }
 
diff --git a/core/modules/views/src/Plugin/Derivative/ViewsExposedFilterBlock.php b/core/modules/views/src/Plugin/Derivative/ViewsExposedFilterBlock.php
index 50edadcb04374482d1f1d209b81f85b2affd73fb..fc2e9b894b7fca05ca9fc4ce2017d146f62e797d 100644
--- a/core/modules/views/src/Plugin/Derivative/ViewsExposedFilterBlock.php
+++ b/core/modules/views/src/Plugin/Derivative/ViewsExposedFilterBlock.php
@@ -18,7 +18,7 @@ class ViewsExposedFilterBlock implements ContainerDeriverInterface {
    *
    * @var array
    */
-  protected $derivatives = array();
+  protected $derivatives = [];
 
   /**
    * The view storage.
@@ -85,15 +85,15 @@ public function getDerivativeDefinitions($base_plugin_definition) {
           // Add a block definition for the block.
           if ($display->usesExposedFormInBlock()) {
             $delta = $view->id() . '-' . $display->display['id'];
-            $desc = t('Exposed form: @view-@display_id', array('@view' => $view->id(), '@display_id' => $display->display['id']));
-            $this->derivatives[$delta] = array(
+            $desc = t('Exposed form: @view-@display_id', ['@view' => $view->id(), '@display_id' => $display->display['id']]);
+            $this->derivatives[$delta] = [
               'admin_label' => $desc,
-              'config_dependencies' => array(
-                'config' => array(
+              'config_dependencies' => [
+                'config' => [
                   $view->getConfigDependencyName(),
-                )
-              )
-            );
+                ]
+              ]
+            ];
             $this->derivatives[$delta] += $base_plugin_definition;
           }
         }
diff --git a/core/modules/views/src/Plugin/Derivative/ViewsLocalTask.php b/core/modules/views/src/Plugin/Derivative/ViewsLocalTask.php
index a8149848f439badca955ba7595109ef05c57e87b..bc6400c0189bd75f16d6784564575dfd6d09fce7 100644
--- a/core/modules/views/src/Plugin/Derivative/ViewsLocalTask.php
+++ b/core/modules/views/src/Plugin/Derivative/ViewsLocalTask.php
@@ -67,7 +67,7 @@ public static function create(ContainerInterface $container, $base_plugin_id) {
    * {@inheritdoc}
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    $this->derivatives = array();
+    $this->derivatives = [];
 
     $view_route_names = $this->state->get('views.view_route_names');
     foreach ($this->getApplicableMenuViews() as $pair) {
@@ -77,7 +77,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
 
       $executable->setDisplay($display_id);
       $menu = $executable->display_handler->getOption('menu');
-      if (in_array($menu['type'], array('tab', 'default tab'))) {
+      if (in_array($menu['type'], ['tab', 'default tab'])) {
         $plugin_id = 'view.' . $executable->storage->id() . '.' . $display_id;
         $route_name = $view_route_names[$executable->storage->id() . '.' . $display_id];
 
@@ -87,11 +87,11 @@ public function getDerivativeDefinitions($base_plugin_definition) {
           continue;
         }
 
-        $this->derivatives[$plugin_id] = array(
+        $this->derivatives[$plugin_id] = [
           'route_name' => $route_name,
           'weight' => $menu['weight'],
           'title' => $menu['title'],
-        ) + $base_plugin_definition;
+        ] + $base_plugin_definition;
 
         // Default local tasks have themselves as root tab.
         if ($menu['type'] == 'default tab') {
@@ -117,7 +117,7 @@ public function alterLocalTasks(&$local_tasks) {
       $menu = $executable->display_handler->getOption('menu');
 
       // We already have set the base_route for default tabs.
-      if (in_array($menu['type'], array('tab'))) {
+      if (in_array($menu['type'], ['tab'])) {
         $plugin_id = 'view.' . $executable->storage->id() . '.' . $display_id;
         $view_route_name = $view_route_names[$executable->storage->id() . '.' . $display_id];
 
diff --git a/core/modules/views/src/Plugin/Derivative/ViewsMenuLink.php b/core/modules/views/src/Plugin/Derivative/ViewsMenuLink.php
index 1095d01f243ae35c9729d820c154c1a9711d30d5..40dfe44a205dc37d4a74bf99d75ea8007cb66ca3 100644
--- a/core/modules/views/src/Plugin/Derivative/ViewsMenuLink.php
+++ b/core/modules/views/src/Plugin/Derivative/ViewsMenuLink.php
@@ -46,7 +46,7 @@ public static function create(ContainerInterface $container, $base_plugin_id) {
    * {@inheritdoc}
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    $links = array();
+    $links = [];
     $views = Views::getApplicableViews('uses_menu_links');
 
     foreach ($views as $data) {
diff --git a/core/modules/views/src/Plugin/EntityReferenceSelection/ViewsSelection.php b/core/modules/views/src/Plugin/EntityReferenceSelection/ViewsSelection.php
index db1905292804774ddc2d3d4f6afb0e66dc3f332c..05ac9b99f14e159a32193de58e4bcac30c201417 100644
--- a/core/modules/views/src/Plugin/EntityReferenceSelection/ViewsSelection.php
+++ b/core/modules/views/src/Plugin/EntityReferenceSelection/ViewsSelection.php
@@ -97,14 +97,14 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     $selection_handler_settings = $this->configuration['handler_settings'];
-    $view_settings = !empty($selection_handler_settings['view']) ? $selection_handler_settings['view'] : array();
+    $view_settings = !empty($selection_handler_settings['view']) ? $selection_handler_settings['view'] : [];
     $displays = Views::getApplicableViews('entity_reference_display');
     // Filter views that list the entity type we want, and group the separate
     // displays by view.
     $entity_type = $this->entityManager->getDefinition($this->configuration['target_type']);
     $view_storage = $this->entityManager->getStorage('view');
 
-    $options = array();
+    $options = [];
     foreach ($displays as $data) {
       list($view_id, $display_id) = $data;
       $view = $view_storage->load($view_id);
@@ -118,36 +118,36 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     // into 'view_name' and 'view_display' in the final submitted values, so
     // we massage the data at validate time on the wrapping element (not
     // ideal).
-    $form['view']['#element_validate'] = array(array(get_called_class(), 'settingsFormValidate'));
+    $form['view']['#element_validate'] = [[get_called_class(), 'settingsFormValidate']];
 
     if ($options) {
       $default = !empty($view_settings['view_name']) ? $view_settings['view_name'] . ':' . $view_settings['display_name'] : NULL;
-      $form['view']['view_and_display'] = array(
+      $form['view']['view_and_display'] = [
         '#type' => 'select',
         '#title' => $this->t('View used to select the entities'),
         '#required' => TRUE,
         '#options' => $options,
         '#default_value' => $default,
         '#description' => '<p>' . $this->t('Choose the view and display that select the entities that can be referenced.<br />Only views with a display of type "Entity Reference" are eligible.') . '</p>',
-      );
+      ];
 
       $default = !empty($view_settings['arguments']) ? implode(', ', $view_settings['arguments']) : '';
-      $form['view']['arguments'] = array(
+      $form['view']['arguments'] = [
         '#type' => 'textfield',
         '#title' => $this->t('View arguments'),
         '#default_value' => $default,
         '#required' => FALSE,
         '#description' => $this->t('Provide a comma separated list of arguments to pass to the view.'),
-      );
+      ];
     }
     else {
       if ($this->currentUser->hasPermission('administer views') && $this->moduleHandler->moduleExists('views_ui')) {
-        $form['view']['no_view_help'] = array(
-          '#markup' => '<p>' . $this->t('No eligible views were found. <a href=":create">Create a view</a> with an <em>Entity Reference</em> display, or add such a display to an <a href=":existing">existing view</a>.', array(
+        $form['view']['no_view_help'] = [
+          '#markup' => '<p>' . $this->t('No eligible views were found. <a href=":create">Create a view</a> with an <em>Entity Reference</em> display, or add such a display to an <a href=":existing">existing view</a>.', [
             ':create' => Url::fromRoute('views_ui.add')->toString(),
             ':existing' => Url::fromRoute('entity.view.collection')->toString(),
-          )) . '</p>',
-        );
+          ]) . '</p>',
+        ];
       }
       else {
         $form['view']['no_view_help']['#markup'] = '<p>' . $this->t('No eligible views were found.') . '</p>';
@@ -191,18 +191,18 @@ protected function initializeView($match = NULL, $match_operator = 'CONTAINS', $
     // Check that the view is valid and the display still exists.
     $this->view = Views::getView($view_name);
     if (!$this->view || !$this->view->access($display_name)) {
-      drupal_set_message(t('The reference view %view_name cannot be found.', array('%view_name' => $view_name)), 'warning');
+      drupal_set_message(t('The reference view %view_name cannot be found.', ['%view_name' => $view_name]), 'warning');
       return FALSE;
     }
     $this->view->setDisplay($display_name);
 
     // Pass options to the display handler to make them available later.
-    $entity_reference_options = array(
+    $entity_reference_options = [
       'match' => $match,
       'match_operator' => $match_operator,
       'limit' => $limit,
       'ids' => $ids,
-    );
+    ];
     $this->view->displayHandlers->get($display_name)->setOption('entity_reference_options', $entity_reference_options);
     return TRUE;
   }
@@ -214,13 +214,13 @@ public function getReferenceableEntities($match = NULL, $match_operator = 'CONTA
     $handler_settings = $this->configuration['handler_settings'];
     $display_name = $handler_settings['view']['display_name'];
     $arguments = $handler_settings['view']['arguments'];
-    $result = array();
+    $result = [];
     if ($this->initializeView($match, $match_operator, $limit)) {
       // Get the results.
       $result = $this->view->executeDisplay($display_name, $arguments);
     }
 
-    $return = array();
+    $return = [];
     if ($result) {
       foreach ($this->view->result as $row) {
         $entity = $row->_entity;
@@ -245,7 +245,7 @@ public function validateReferenceableEntities(array $ids) {
     $handler_settings = $this->configuration['handler_settings'];
     $display_name = $handler_settings['view']['display_name'];
     $arguments = $handler_settings['view']['arguments'];
-    $result = array();
+    $result = [];
     if ($this->initializeView(NULL, 'CONTAINS', 0, $ids)) {
       // Get the results.
       $entities = $this->view->executeDisplay($display_name, $arguments);
@@ -272,14 +272,14 @@ public static function settingsFormValidate($element, FormStateInterface $form_s
     // empty array instead.
     $arguments_string = trim($element['arguments']['#value']);
     if ($arguments_string === '') {
-      $arguments = array();
+      $arguments = [];
     }
     else {
       // array_map() is called to trim whitespaces from the arguments.
       $arguments = array_map('trim', explode(',', $arguments_string));
     }
 
-    $value = array('view_name' => $view, 'display_name' => $display, 'arguments' => $arguments);
+    $value = ['view_name' => $view, 'display_name' => $display, 'arguments' => $arguments];
     $form_state->setValueForElement($element, $value);
   }
 
diff --git a/core/modules/views/src/Plugin/Menu/Form/ViewsMenuLinkForm.php b/core/modules/views/src/Plugin/Menu/Form/ViewsMenuLinkForm.php
index d330cdf392ff87355c4ae490293aac046f87bf9c..1699f3e94f69da0a456bded85abfd67dd8c3c90b 100644
--- a/core/modules/views/src/Plugin/Menu/Form/ViewsMenuLinkForm.php
+++ b/core/modules/views/src/Plugin/Menu/Form/ViewsMenuLinkForm.php
@@ -28,16 +28,16 @@ class ViewsMenuLinkForm extends MenuLinkDefaultForm {
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
 
     // Put the title field first.
-    $form['title'] = array(
+    $form['title'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Title'),
       // @todo Ensure that the view is not loaded with a localized title.
       //   https://www.drupal.org/node/2309507
       '#default_value' => $this->menuLink->getTitle(),
       '#weight' => -10,
-    );
+    ];
 
-    $form['description'] = array(
+    $form['description'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Description'),
       '#description' => $this->t('Shown when hovering over the menu link.'),
@@ -45,7 +45,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
       //   https://www.drupal.org/node/2309507
       '#default_value' => $this->menuLink->getDescription(),
       '#weight' => -5,
-    );
+    ];
 
     $form += parent::buildConfigurationForm($form, $form_state);
 
@@ -56,10 +56,10 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
     $id = $view->storage->id();
     $label = $view->storage->label();
     if ($this->moduleHandler->moduleExists('views_ui')) {
-      $message = $this->t('This link is provided by the Views module. The path can be changed by editing the view <a href=":url">@label</a>', array(':url' => \Drupal::url('entity.view.edit_form', array('view' => $id)), '@label' => $label));
+      $message = $this->t('This link is provided by the Views module. The path can be changed by editing the view <a href=":url">@label</a>', [':url' => \Drupal::url('entity.view.edit_form', ['view' => $id]), '@label' => $label]);
     }
     else {
-      $message = $this->t('This link is provided by the Views module from view %label.', array('%label' => $label));
+      $message = $this->t('This link is provided by the Views module from view %label.', ['%label' => $label]);
     }
     $form['info']['#title'] = $message;
     return $form;
diff --git a/core/modules/views/src/Plugin/Menu/ViewsMenuLink.php b/core/modules/views/src/Plugin/Menu/ViewsMenuLink.php
index b484c24b124c57493821ad3269a8397c72976cfc..b4f078fc684e94b591df577ec807355d8202b2d0 100644
--- a/core/modules/views/src/Plugin/Menu/ViewsMenuLink.php
+++ b/core/modules/views/src/Plugin/Menu/ViewsMenuLink.php
@@ -18,7 +18,7 @@ class ViewsMenuLink extends MenuLinkBase implements ContainerFactoryPluginInterf
   /**
    * {@inheritdoc}
    */
-  protected $overrideAllowed = array(
+  protected $overrideAllowed = [
     'menu_name' => 1,
     'parent' => 1,
     'weight' => 1,
@@ -26,7 +26,7 @@ class ViewsMenuLink extends MenuLinkBase implements ContainerFactoryPluginInterf
     'enabled' => 1,
     'title' => 1,
     'description' => 1,
-  );
+  ];
 
   /**
    * The entity manager.
diff --git a/core/modules/views/src/Plugin/ViewsHandlerManager.php b/core/modules/views/src/Plugin/ViewsHandlerManager.php
index d918696d67438b50fdd7ffc6d8bf34d544c0bd21..bfc859227a184a62545d4ab75ed1e55706f05fd5 100644
--- a/core/modules/views/src/Plugin/ViewsHandlerManager.php
+++ b/core/modules/views/src/Plugin/ViewsHandlerManager.php
@@ -59,9 +59,9 @@ public function __construct($handler_type, \Traversable $namespaces, ViewsData $
 
     $this->viewsData = $views_data;
     $this->handlerType = $handler_type;
-    $this->defaults = array(
+    $this->defaults = [
       'plugin_type' => $handler_type,
-    );
+    ];
   }
 
   /**
@@ -86,7 +86,7 @@ public function getHandler($item, $override = NULL) {
 
     if (isset($data[$field][$this->handlerType])) {
       $definition = $data[$field][$this->handlerType];
-      foreach (array('group', 'title', 'title short', 'label', 'help', 'real field', 'real table', 'entity type', 'entity field') as $key) {
+      foreach (['group', 'title', 'title short', 'label', 'help', 'real field', 'real table', 'entity type', 'entity field'] as $key) {
         if (!isset($definition[$key])) {
           // First check the field level.
           if (!empty($data[$field][$key])) {
@@ -111,13 +111,13 @@ public function getHandler($item, $override = NULL) {
     }
 
     // Finally, use the 'broken' handler.
-    return $this->createInstance('broken', array('original_configuration' => $item));
+    return $this->createInstance('broken', ['original_configuration' => $item]);
   }
 
   /**
    * {@inheritdoc}
    */
-  public function createInstance($plugin_id, array $configuration = array()) {
+  public function createInstance($plugin_id, array $configuration = []) {
     $instance = parent::createInstance($plugin_id, $configuration);
     if ($instance instanceof HandlerBase) {
       $instance->setModuleHandler($this->moduleHandler);
@@ -129,7 +129,7 @@ public function createInstance($plugin_id, array $configuration = array()) {
   /**
    * {@inheritdoc}
    */
-  public function getFallbackPluginId($plugin_id, array $configuration = array()) {
+  public function getFallbackPluginId($plugin_id, array $configuration = []) {
     return 'broken';
   }
 
diff --git a/core/modules/views/src/Plugin/ViewsPluginManager.php b/core/modules/views/src/Plugin/ViewsPluginManager.php
index a8dadb0485bdda6c0fe774c3c6a5135397c6f809..8124d316302887335465180ed80406de6a58ebf2 100644
--- a/core/modules/views/src/Plugin/ViewsPluginManager.php
+++ b/core/modules/views/src/Plugin/ViewsPluginManager.php
@@ -31,11 +31,11 @@ public function __construct($type, \Traversable $namespaces, CacheBackendInterfa
     $plugin_definition_annotation_name = 'Drupal\views\Annotation\Views' . Container::camelize($type);
     parent::__construct("Plugin/views/$type", $namespaces, $module_handler, 'Drupal\views\Plugin\views\ViewsPluginInterface', $plugin_definition_annotation_name);
 
-    $this->defaults += array(
+    $this->defaults += [
       'parent' => 'parent',
       'plugin_type' => $type,
       'register_theme' => TRUE,
-    );
+    ];
 
     $this->alterInfo('views_plugins_' . $type);
     $this->setCacheBackend($cache_backend, "views:$type");
diff --git a/core/modules/views/src/Plugin/views/BrokenHandlerTrait.php b/core/modules/views/src/Plugin/views/BrokenHandlerTrait.php
index df129da49984926c8f0674eb5771fc3ee9393052..00233f7cca6cc42fafb0f027fcb497ee609a097c 100644
--- a/core/modules/views/src/Plugin/views/BrokenHandlerTrait.php
+++ b/core/modules/views/src/Plugin/views/BrokenHandlerTrait.php
@@ -25,7 +25,7 @@ public function adminLabel($short = FALSE) {
    * @see \Drupal\views\Plugin\views\PluginBase::defineOptions()
    */
   public function defineOptions() {
-    return array();
+    return [];
   }
 
   /**
@@ -55,28 +55,28 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     foreach ($this->definition['original_configuration'] as $key => $value) {
       if (is_scalar($value)) {
-        $items[] = SafeMarkup::format('@key: @value', array('@key' => $key, '@value' => $value));
+        $items[] = SafeMarkup::format('@key: @value', ['@key' => $key, '@value' => $value]);
       }
     }
 
     $description_bottom = t('Enabling the appropriate module will may solve this issue. Otherwise, check to see if there is a module update available.');
 
-    $form['description'] = array(
+    $form['description'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('js-form-item', 'form-item', 'description'),
-      ),
-      'description_top' => array(
+      '#attributes' => [
+        'class' => ['js-form-item', 'form-item', 'description'],
+      ],
+      'description_top' => [
         '#markup' => '<p>' . $description_top . '</p>',
-      ),
-      'detail_list' => array(
+      ],
+      'detail_list' => [
         '#theme' => 'item_list',
         '#items' => $items,
-      ),
-      'description_bottom' => array(
+      ],
+      'description_bottom' => [
         '#markup' => '<p>' . $description_bottom . '</p>',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/HandlerBase.php b/core/modules/views/src/Plugin/views/HandlerBase.php
index 5c2200cc6ed10aaf6b2049ad5c2fdfde710cca62..8396c6bbf67cbf4695ac7ea35a2781a3576c1979 100644
--- a/core/modules/views/src/Plugin/views/HandlerBase.php
+++ b/core/modules/views/src/Plugin/views/HandlerBase.php
@@ -138,12 +138,12 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['id'] = array('default' => '');
-    $options['table'] = array('default' => '');
-    $options['field'] = array('default' => '');
-    $options['relationship'] = array('default' => 'none');
-    $options['group_type'] = array('default' => 'group');
-    $options['admin_label'] = array('default' => '');
+    $options['id'] = ['default' => ''];
+    $options['table'] = ['default' => ''];
+    $options['field'] = ['default' => ''];
+    $options['relationship'] = ['default' => 'none'];
+    $options['group_type'] = ['default' => 'group'];
+    $options['admin_label'] = ['default' => ''];
 
     return $options;
   }
@@ -156,7 +156,7 @@ public function adminLabel($short = FALSE) {
       return $this->options['admin_label'];
     }
     $title = ($short && isset($this->definition['title short'])) ? $this->definition['title short'] : $this->definition['title'];
-    return $this->t('@group: @title', array('@group' => $this->definition['group'], '@title' => $title));
+    return $this->t('@group: @title', ['@group' => $this->definition['group'], '@title' => $title]);
   }
 
   /**
@@ -248,36 +248,36 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     // be moved into one because of the $form_state->getValues() hierarchy. Those
     // elements can add a #fieldset => 'fieldset_name' property, and they'll
     // be moved to their fieldset during pre_render.
-    $form['#pre_render'][] = array(get_class($this), 'preRenderAddFieldsetMarkup');
+    $form['#pre_render'][] = [get_class($this), 'preRenderAddFieldsetMarkup'];
 
     parent::buildOptionsForm($form, $form_state);
 
-    $form['fieldsets'] = array(
+    $form['fieldsets'] = [
       '#type' => 'value',
-      '#value' => array('more', 'admin_label'),
-    );
+      '#value' => ['more', 'admin_label'],
+    ];
 
-    $form['admin_label'] = array(
+    $form['admin_label'] = [
       '#type' => 'details',
       '#title' => $this->t('Administrative title'),
       '#weight' => 150,
-    );
-    $form['admin_label']['admin_label'] = array(
+    ];
+    $form['admin_label']['admin_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Administrative title'),
       '#description' => $this->t('This title will be displayed on the views edit page instead of the default one. This might be useful if you have the same item twice.'),
       '#default_value' => $this->options['admin_label'],
-      '#parents' => array('options', 'admin_label'),
-    );
+      '#parents' => ['options', 'admin_label'],
+    ];
 
     // This form is long and messy enough that the "Administrative title" option
     // belongs in "Administrative title" fieldset at the bottom of the form.
-    $form['more'] = array(
+    $form['more'] = [
       '#type' => 'details',
       '#title' => $this->t('More'),
       '#weight' => 200,
       '#optional' => TRUE,
-    );
+    ];
 
     // Allow to alter the default values brought into the form.
     // @todo Do we really want to keep this hook.
@@ -329,13 +329,13 @@ public function buildGroupByForm(&$form, FormStateInterface $form_state) {
       $group_types[$id] = $aggregate['title'];
     }
 
-    $form['group_type'] = array(
+    $form['group_type'] = [
       '#type' => 'select',
       '#title' => $this->t('Aggregation type'),
       '#default_value' => $this->options['group_type'],
       '#description' => $this->t('Select the aggregation function to use on this field.'),
       '#options' => $group_types,
-    );
+    ];
   }
 
   /**
@@ -454,7 +454,7 @@ public function showExposeForm(&$form, FormStateInterface $form_state) {
   public function access(AccountInterface $account) {
     if (isset($this->definition['access callback']) && function_exists($this->definition['access callback'])) {
       if (isset($this->definition['access arguments']) && is_array($this->definition['access arguments'])) {
-        return call_user_func_array($this->definition['access callback'], array($account) + $this->definition['access arguments']);
+        return call_user_func_array($this->definition['access callback'], [$account] + $this->definition['access arguments']);
       }
       return $this->definition['access callback']($account);
     }
@@ -587,7 +587,7 @@ public function getJoin() {
   /**
    * {@inheritdoc}
    */
-  public function validate() { return array(); }
+  public function validate() { return []; }
 
   /**
    * {@inheritdoc}
@@ -703,7 +703,7 @@ public function getEntityType() {
    */
   public static function breakString($str, $force_int = FALSE) {
     $operator = NULL;
-    $value = array();
+    $value = [];
 
     // Determine if the string has 'or' operators (plus signs) or 'and'
     // operators (commas) and split the string accordingly.
@@ -726,7 +726,7 @@ public static function breakString($str, $force_int = FALSE) {
       $value = array_map('intval', $value);
     }
 
-    return (object) array('value' => $value, 'operator' => $operator);
+    return (object) ['value' => $value, 'operator' => $operator];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/PluginBase.php b/core/modules/views/src/Plugin/views/PluginBase.php
index 6d5aec184a7d48d3a6c107c93463197259789c92..e523ebafaffe6e2f8a20446e795afd4059254e5f 100644
--- a/core/modules/views/src/Plugin/views/PluginBase.php
+++ b/core/modules/views/src/Plugin/views/PluginBase.php
@@ -66,7 +66,7 @@ abstract class PluginBase extends ComponentPluginBase implements ContainerFactor
    *
    * @var array
    */
-  public $options = array();
+  public $options = [];
 
   /**
    * The top object of a view.
@@ -155,7 +155,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    * @return array
    *   Returns the options of this handler/plugin.
    */
-  protected function defineOptions() { return array(); }
+  protected function defineOptions() { return []; }
 
   /**
    * Fills up the options of the plugin with defaults.
@@ -175,7 +175,7 @@ protected function defineOptions() { return array(); }
   protected function setOptionDefaults(array &$storage, array $options) {
     foreach ($options as $option => $definition) {
       if (isset($definition['contains'])) {
-        $storage[$option] = array();
+        $storage[$option] = [];
         $this->setOptionDefaults($storage[$option], $definition['contains']);
       }
       else {
@@ -231,7 +231,7 @@ public function unpackOptions(&$storage, $options, $definition = NULL, $all = TR
         }
 
         if (!isset($storage[$key]) || !is_array($storage[$key])) {
-          $storage[$key] = array();
+          $storage[$key] = [];
         }
 
         // If we're just unpacking our known options, and we're dropping an
@@ -242,7 +242,7 @@ public function unpackOptions(&$storage, $options, $definition = NULL, $all = TR
           continue;
         }
 
-        $this->unpackOptions($storage[$key], $value, isset($definition[$key]['contains']) ? $definition[$key]['contains'] : array(), $all, FALSE);
+        $this->unpackOptions($storage[$key], $value, isset($definition[$key]['contains']) ? $definition[$key]['contains'] : [], $all, FALSE);
       }
       elseif ($all || !empty($definition[$key])) {
         $storage[$key] = $value;
@@ -265,7 +265,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     // be moved into one because of the $form_state->getValues() hierarchy. Those
     // elements can add a #fieldset => 'fieldset_name' property, and they'll
     // be moved to their fieldset during pre_render.
-    $form['#pre_render'][] = array(get_class($this), 'preRenderAddFieldsetMarkup');
+    $form['#pre_render'][] = [get_class($this), 'preRenderAddFieldsetMarkup'];
   }
 
   /**
@@ -293,7 +293,7 @@ public function themeFunctions() {
   /**
    * {@inheritdoc}
    */
-  public function validate() { return array(); }
+  public function validate() { return []; }
 
   /**
    * {@inheritdoc}
@@ -323,8 +323,8 @@ public function usesOptions() {
   /**
    * {@inheritdoc}
    */
-  public function globalTokenReplace($string = '', array $options = array()) {
-    return \Drupal::token()->replace($string, array('view' => $this->view), $options);
+  public function globalTokenReplace($string = '', array $options = []) {
+    return \Drupal::token()->replace($string, ['view' => $this->view], $options);
   }
 
   /**
@@ -347,7 +347,7 @@ protected function viewsTokenReplace($text, $tokens) {
       return Xss::filterAdmin($text);
     }
 
-    $twig_tokens = array();
+    $twig_tokens = [];
     foreach ($tokens as $token => $replacement) {
       // Twig wants a token replacement array stripped of curly-brackets.
       // Some Views tokens come with curly-braces, others do not.
@@ -371,11 +371,11 @@ protected function viewsTokenReplace($text, $tokens) {
         $parts = explode('.', $token);
         $top = array_shift($parts);
         assert('preg_match(\'/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/\', $top) === 1', 'Tokens need to be valid Twig variables.');
-        $token_array = array(array_pop($parts) => $replacement);
+        $token_array = [array_pop($parts) => $replacement];
         foreach (array_reverse($parts) as $key) {
           // The key could also be numeric (array index) so allow that.
           assert('is_numeric($key) || (preg_match(\'/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/\', $key) === 1)', 'Tokens need to be valid Twig variables.');
-          $token_array = array($key => $token_array);
+          $token_array = [$key => $token_array];
         }
         if (!isset($twig_tokens[$top])) {
           $twig_tokens[$top] = [];
@@ -389,7 +389,7 @@ protected function viewsTokenReplace($text, $tokens) {
       // Otherwise, Xss::filterAdmin could remove valid Twig syntax before the
       // template is parsed.
 
-      $build = array(
+      $build = [
         '#type' => 'inline_template',
         '#template' => $text,
         '#context' => $twig_tokens,
@@ -398,7 +398,7 @@ function ($children, $elements) {
             return Xss::filterAdmin($children);
           }
         ],
-      );
+      ];
 
       // Currently you cannot attach assets to tokens with
       // Renderer::renderPlain(). This may be unnecessarily limiting. Consider
@@ -414,15 +414,15 @@ function ($children, $elements) {
   /**
    * {@inheritdoc}
    */
-  public function getAvailableGlobalTokens($prepared = FALSE, array $types = array()) {
+  public function getAvailableGlobalTokens($prepared = FALSE, array $types = []) {
     $info = \Drupal::token()->getInfo();
     // Site and view tokens should always be available.
-    $types += array('site', 'view');
+    $types += ['site', 'view'];
     $available = array_intersect_key($info['tokens'], array_flip($types));
 
     // Construct the token string for each token.
     if ($prepared) {
-      $prepared = array();
+      $prepared = [];
       foreach ($available as $type => $tokens) {
         foreach (array_keys($tokens) as $token) {
           $prepared[$type][] = "[$type:$token]";
@@ -439,13 +439,13 @@ public function getAvailableGlobalTokens($prepared = FALSE, array $types = array
    * {@inheritdoc}
    */
   public function globalTokenForm(&$form, FormStateInterface $form_state) {
-    $token_items = array();
+    $token_items = [];
 
     foreach ($this->getAvailableGlobalTokens() as $type => $tokens) {
-      $item = array(
+      $item = [
         '#markup' => $type,
-        'children' => array(),
-      );
+        'children' => [],
+      ];
       foreach ($tokens as $name => $info) {
         $item['children'][$name] = "[$type:$name]" . ' - ' . $info['name'] . ': ' . $info['description'];
       }
@@ -453,17 +453,17 @@ public function globalTokenForm(&$form, FormStateInterface $form_state) {
       $token_items[$type] = $item;
     }
 
-    $form['global_tokens'] = array(
+    $form['global_tokens'] = [
       '#type' => 'details',
       '#title' => $this->t('Available global token replacements'),
-    );
-    $form['global_tokens']['list'] = array(
+    ];
+    $form['global_tokens']['list'] = [
       '#theme' => 'item_list',
       '#items' => $token_items,
-      '#attributes' => array(
-        'class' => array('global-tokens'),
-      ),
-    );
+      '#attributes' => [
+        'class' => ['global-tokens'],
+      ],
+    ];
   }
 
   /**
@@ -546,7 +546,7 @@ public function getProvider() {
   protected function listLanguages($flags = LanguageInterface::STATE_ALL, array $current_values = NULL) {
     $manager = \Drupal::languageManager();
     $languages = $manager->getLanguages($flags);
-    $list = array();
+    $list = [];
 
     // The entity languages should come first, if requested.
     if ($flags & PluginBase::INCLUDE_ENTITY) {
@@ -582,7 +582,7 @@ protected function listLanguages($flags = LanguageInterface::STATE_ALL, array $c
           $name = $types_info[$id]['name'];
           // Surround IDs by '***LANGUAGE_...***', to avoid query collisions.
           $id = '***LANGUAGE_' . $id . '***';
-          $list[$id] = $this->t('@type language selected for page', array('@type' => $name));
+          $list[$id] = $this->t('@type language selected for page', ['@type' => $name]);
         }
       }
       if (!empty($current_values)) {
@@ -592,7 +592,7 @@ protected function listLanguages($flags = LanguageInterface::STATE_ALL, array $c
           // add that option too, so it is not lost. If not among the current
           // values, skip displaying it to avoid user confusion.
           if (isset($type['name']) && !isset($list[$id]) && in_array($id, $current_values)) {
-            $list[$id] = $this->t('@type language selected for page', array('@type' => $type['name']));
+            $list[$id] = $this->t('@type language selected for page', ['@type' => $type['name']]);
           }
         }
       }
@@ -619,7 +619,7 @@ protected function listLanguages($flags = LanguageInterface::STATE_ALL, array $c
    *   the query substitutions needed for the special language types.
    */
   public static function queryLanguageSubstitutions() {
-    $changes = array();
+    $changes = [];
     $manager = \Drupal::languageManager();
 
     // Handle default language.
diff --git a/core/modules/views/src/Plugin/views/ViewsPluginInterface.php b/core/modules/views/src/Plugin/views/ViewsPluginInterface.php
index e685c4d8af42be71aa9da11032db720845a11fb3..83d9c89bbc7cf65f1cb6b7cd23a16e4707dbfc52 100644
--- a/core/modules/views/src/Plugin/views/ViewsPluginInterface.php
+++ b/core/modules/views/src/Plugin/views/ViewsPluginInterface.php
@@ -113,7 +113,7 @@ public function globalTokenForm(&$form, FormStateInterface $form_state);
    * @return array
    *   An array of available token replacement info or tokens, grouped by type.
    */
-  public function getAvailableGlobalTokens($prepared = FALSE, array $types = array());
+  public function getAvailableGlobalTokens($prepared = FALSE, array $types = []);
 
   /**
    * Flattens the structure of form elements.
@@ -141,7 +141,7 @@ public static function preRenderFlattenData($form);
    * @return string
    *   The tokenized string.
    */
-  public function globalTokenReplace($string = '', array $options = array());
+  public function globalTokenReplace($string = '', array $options = []);
 
   /**
    * Clears a plugin.
diff --git a/core/modules/views/src/Plugin/views/area/AreaPluginBase.php b/core/modules/views/src/Plugin/views/area/AreaPluginBase.php
index 2ad7f46be9b82409826df691b314e2a6fa4ee941..813e4306c0987ee4a43b1547eac260b147789998 100644
--- a/core/modules/views/src/Plugin/views/area/AreaPluginBase.php
+++ b/core/modules/views/src/Plugin/views/area/AreaPluginBase.php
@@ -62,7 +62,7 @@ protected function defineOptions() {
     $this->definition['field'] = !empty($this->definition['field']) ? $this->definition['field'] : '';
     $label = !empty($this->definition['label']) ? $this->definition['label'] : $this->definition['field'];
     $options['admin_label']['default'] = $label;
-    $options['empty'] = array('default' => FALSE);
+    $options['empty'] = ['default' => FALSE];
 
     return $options;
   }
@@ -81,11 +81,11 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
     if ($form_state->get('type') != 'empty') {
-      $form['empty'] = array(
+      $form['empty'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Display even if view has no result'),
         '#default_value' => isset($this->options['empty']) ? $this->options['empty'] : 0,
-      );
+      ];
     }
   }
 
diff --git a/core/modules/views/src/Plugin/views/area/Broken.php b/core/modules/views/src/Plugin/views/area/Broken.php
index 549c306298e0693d0a4daaf6c8f06ff64e8065fd..7bd6cdbd83ffd2afb30434c71548f5bd6f444ebe 100644
--- a/core/modules/views/src/Plugin/views/area/Broken.php
+++ b/core/modules/views/src/Plugin/views/area/Broken.php
@@ -19,7 +19,7 @@ class Broken extends AreaPluginBase {
    */
   public function render($empty = FALSE) {
     // Simply render nothing by returning an empty render array.
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/area/Entity.php b/core/modules/views/src/Plugin/views/area/Entity.php
index 30c24ecb3a9e2191476511865a9ebcb587ae1969..d073d53fcf73afa6c84d88680e7b89b8ea284f15 100644
--- a/core/modules/views/src/Plugin/views/area/Entity.php
+++ b/core/modules/views/src/Plugin/views/area/Entity.php
@@ -93,12 +93,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['view_mode'] = array(
+    $form['view_mode'] = [
       '#type' => 'select',
       '#options' => $this->entityManager->getViewModeOptions($this->entityType),
       '#title' => $this->t('View mode'),
       '#default_value' => $this->options['view_mode'],
-    );
+    ];
 
     $label = $this->entityManager->getDefinition($this->entityType)->getLabel();
     $target = $this->options['target'];
@@ -121,12 +121,12 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       '#default_value' => $target,
     ];
 
-    $form['bypass_access'] = array(
+    $form['bypass_access'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Bypass access checks'),
       '#description' => $this->t('If enabled, access permissions for rendering the entity are not checked.'),
       '#default_value' => !empty($this->options['bypass_access']),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/area/HTTPStatusCode.php b/core/modules/views/src/Plugin/views/area/HTTPStatusCode.php
index 4f6667a5e9bdd9b835e5e799529e6aac3159e3eb..d9b81454125119ce922de06e68ee5e1c81fdd488 100644
--- a/core/modules/views/src/Plugin/views/area/HTTPStatusCode.php
+++ b/core/modules/views/src/Plugin/views/area/HTTPStatusCode.php
@@ -20,7 +20,7 @@ class HTTPStatusCode extends AreaPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['status_code'] = array('default' => 200);
+    $options['status_code'] = ['default' => 200];
 
     return $options;
   }
@@ -35,23 +35,23 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     $options = Response::$statusTexts;
 
     // Move 403/404/500 to the top.
-    $options = array(
+    $options = [
       '404' => $options['404'],
       '403' => $options['403'],
       '500' => $options['500'],
-    ) + $options;
+    ] + $options;
 
     // Add the HTTP status code, so it's easier for people to find it.
     array_walk($options, function($title, $code) use(&$options) {
-      $options[$code] = $this->t('@code (@title)', array('@code' => $code, '@title' => $title));
+      $options[$code] = $this->t('@code (@title)', ['@code' => $code, '@title' => $title]);
     });
 
-    $form['status_code'] = array(
+    $form['status_code'] = [
       '#title' => $this->t('HTTP status code'),
       '#type' => 'select',
       '#default_value' => $this->options['status_code'],
       '#options' => $options,
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/area/Messages.php b/core/modules/views/src/Plugin/views/area/Messages.php
index 37df125a683203ba751ec4946f58c132e1c421b6..c26b995ed388e679b8954bff066c9a9c9a3d0702 100644
--- a/core/modules/views/src/Plugin/views/area/Messages.php
+++ b/core/modules/views/src/Plugin/views/area/Messages.php
@@ -26,11 +26,11 @@ protected function defineOptions() {
    */
   public function render($empty = FALSE) {
     if (!$empty || !empty($this->options['empty'])) {
-      return array(
+      return [
         '#type' => 'status_messages',
-      );
+      ];
     }
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/area/Result.php b/core/modules/views/src/Plugin/views/area/Result.php
index d8139cbee8a5a5cdb41b1129e4decdd12f6f85fd..f0082dbb7b36cff9833a793b03d04fe1f065ba85 100644
--- a/core/modules/views/src/Plugin/views/area/Result.php
+++ b/core/modules/views/src/Plugin/views/area/Result.php
@@ -22,9 +22,9 @@ class Result extends AreaPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['content'] = array(
+    $options['content'] = [
       'default' => $this->t('Displaying @start - @end of @total'),
-    );
+    ];
 
     return $options;
   }
@@ -34,9 +34,9 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $item_list = array(
+    $item_list = [
       '#theme' => 'item_list',
-      '#items' => array(
+      '#items' => [
         '@start -- the initial record number in the set',
         '@end -- the last record number in the set',
         '@total -- the total records in the set',
@@ -45,16 +45,16 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         '@current_page -- the current page number',
         '@current_record_count -- the current page record count',
         '@page_count -- the total page count',
-      ),
-    );
+      ],
+    ];
     $list = drupal_render($item_list);
-    $form['content'] = array(
+    $form['content'] = [
       '#title' => $this->t('Display'),
       '#type' => 'textarea',
       '#rows' => 3,
       '#default_value' => $this->options['content'],
       '#description' => $this->t('You may use HTML code in this field. The following tokens are supported:') . $list,
-    );
+    ];
   }
 
   /**
@@ -72,7 +72,7 @@ public function query() {
   public function render($empty = FALSE) {
     // Must have options and does not work on summaries.
     if (!isset($this->options['content']) || $this->view->style_plugin instanceof DefaultSummary) {
-      return array();
+      return [];
     }
     $output = '';
     $format = $this->options['content'];
@@ -113,9 +113,9 @@ public function render($empty = FALSE) {
       $output .= Xss::filterAdmin(str_replace(array_keys($replacements), array_values($replacements), $format));
     }
     // Return as render array.
-    return array(
+    return [
       '#markup' => $output,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/area/Text.php b/core/modules/views/src/Plugin/views/area/Text.php
index dab32e9e932315bc0cf6fc4f6e15c8537eb9fc69..aafcbf2095d6f0fc9b5404630f0a3f94d2e8077f 100644
--- a/core/modules/views/src/Plugin/views/area/Text.php
+++ b/core/modules/views/src/Plugin/views/area/Text.php
@@ -18,12 +18,12 @@ class Text extends TokenizeAreaPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['content'] = array(
-      'contains' => array(
-        'value' => array('default' => ''),
-        'format' => array('default' => NULL),
-      ),
-    );
+    $options['content'] = [
+      'contains' => [
+        'value' => ['default' => ''],
+        'format' => ['default' => NULL],
+      ],
+    ];
     return $options;
   }
 
@@ -33,14 +33,14 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['content'] = array(
+    $form['content'] = [
       '#title' => $this->t('Content'),
       '#type' => 'text_format',
       '#default_value' => $this->options['content']['value'],
       '#rows' => 6,
       '#format' => isset($this->options['content']['format']) ? $this->options['content']['format'] : filter_default_format(),
       '#editor' => FALSE,
-    );
+    ];
   }
 
   /**
@@ -60,14 +60,14 @@ public function preQuery() {
   public function render($empty = FALSE) {
     $format = isset($this->options['content']['format']) ? $this->options['content']['format'] : filter_default_format();
     if (!$empty || !empty($this->options['empty'])) {
-      return array(
+      return [
         '#type' => 'processed_text',
         '#text' => $this->tokenizeValue($this->options['content']['value']),
         '#format' => $format,
-      );
+      ];
     }
 
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/area/TextCustom.php b/core/modules/views/src/Plugin/views/area/TextCustom.php
index 0eeabaa92d4c1cf95c32a42eb03224cc71e4483a..56e963dd6f457a2d77c712ac93e4c0e4d91dcb0d 100644
--- a/core/modules/views/src/Plugin/views/area/TextCustom.php
+++ b/core/modules/views/src/Plugin/views/area/TextCustom.php
@@ -18,7 +18,7 @@ class TextCustom extends TokenizeAreaPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['content'] = array('default' => '');
+    $options['content'] = ['default' => ''];
     return $options;
   }
 
@@ -28,12 +28,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['content'] = array(
+    $form['content'] = [
       '#title' => $this->t('Content'),
       '#type' => 'textarea',
       '#default_value' => $this->options['content'],
       '#rows' => 6,
-    );
+    ];
   }
 
   /**
@@ -41,12 +41,12 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    */
   public function render($empty = FALSE) {
     if (!$empty || !empty($this->options['empty'])) {
-      return array(
+      return [
         '#markup' => $this->renderTextarea($this->options['content']),
-      );
+      ];
     }
 
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/area/Title.php b/core/modules/views/src/Plugin/views/area/Title.php
index 85e4788167abc5ebfaf9f9a60c93e84a8ab2d117..d6139e0a104b212e9bbee036d13758b1d2480c6e 100644
--- a/core/modules/views/src/Plugin/views/area/Title.php
+++ b/core/modules/views/src/Plugin/views/area/Title.php
@@ -18,7 +18,7 @@ class Title extends AreaPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['title'] = array('default' => '');
+    $options['title'] = ['default' => ''];
     return $options;
   }
 
@@ -28,12 +28,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['title'] = array(
+    $form['title'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Overridden title'),
       '#default_value' => $this->options['title'],
       '#description' => $this->t('Override the title of this view when it is empty. The available global tokens below can be used here.'),
-    );
+    ];
 
     // Don't use the AreaPluginBase tokenForm method, we don't want row tokens.
     $this->globalTokenForm($form, $form_state);
@@ -57,7 +57,7 @@ public function preRender(array $results) {
    */
   public function render($empty = FALSE) {
     // Do nothing for this handler by returning an empty render array.
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/area/TokenizeAreaPluginBase.php b/core/modules/views/src/Plugin/views/area/TokenizeAreaPluginBase.php
index e8833787c9ad63bcaf95ce7b9139ebb0355dba8e..1e0047976c78584845ea1ba787973c5d0ce633b3 100644
--- a/core/modules/views/src/Plugin/views/area/TokenizeAreaPluginBase.php
+++ b/core/modules/views/src/Plugin/views/area/TokenizeAreaPluginBase.php
@@ -21,7 +21,7 @@ abstract class TokenizeAreaPluginBase extends AreaPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['tokenize'] = array('default' => FALSE);
+    $options['tokenize'] = ['default' => FALSE];
     return $options;
   }
 
@@ -39,14 +39,14 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    * Adds tokenization form elements.
    */
   public function tokenForm(&$form, FormStateInterface $form_state) {
-    $form['tokenize'] = array(
+    $form['tokenize'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Use replacement tokens from the first row'),
       '#default_value' => $this->options['tokenize'],
-    );
+    ];
 
     // Get a list of the available fields and arguments for token replacement.
-    $options = array();
+    $options = [];
     $optgroup_arguments = (string) t('Arguments');
     $optgroup_fields = (string) t('Fields');
     foreach ($this->view->display_handler->getHandlers('field') as $field => $handler) {
@@ -54,35 +54,35 @@ public function tokenForm(&$form, FormStateInterface $form_state) {
     }
 
     foreach ($this->view->display_handler->getHandlers('argument') as $arg => $handler) {
-      $options[$optgroup_arguments]["{{ arguments.$arg }}"] = $this->t('@argument title', array('@argument' => $handler->adminLabel()));
-      $options[$optgroup_arguments]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', array('@argument' => $handler->adminLabel()));
+      $options[$optgroup_arguments]["{{ arguments.$arg }}"] = $this->t('@argument title', ['@argument' => $handler->adminLabel()]);
+      $options[$optgroup_arguments]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', ['@argument' => $handler->adminLabel()]);
     }
 
     if (!empty($options)) {
-      $form['tokens'] = array(
+      $form['tokens'] = [
         '#type' => 'details',
         '#title' => $this->t('Replacement patterns'),
         '#open' => TRUE,
         '#id' => 'edit-options-token-help',
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[tokenize]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['tokens']['help'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[tokenize]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['tokens']['help'] = [
         '#markup' => '<p>' . $this->t('The following tokens are available. You may use Twig syntax in this field.') . '</p>',
-      );
+      ];
       foreach (array_keys($options) as $type) {
         if (!empty($options[$type])) {
-          $items = array();
+          $items = [];
           foreach ($options[$type] as $key => $value) {
             $items[] = $key . ' == ' . $value;
           }
-          $form['tokens'][$type]['tokens'] = array(
+          $form['tokens'][$type]['tokens'] = [
             '#theme' => 'item_list',
             '#items' => $items,
-          );
+          ];
         }
       }
     }
diff --git a/core/modules/views/src/Plugin/views/area/View.php b/core/modules/views/src/Plugin/views/area/View.php
index 12f417cf279d820f8334b0a14f2a877ed231a9b7..832e23185ddff0eb04580943c6f916ebc736e996 100644
--- a/core/modules/views/src/Plugin/views/area/View.php
+++ b/core/modules/views/src/Plugin/views/area/View.php
@@ -66,8 +66,8 @@ public static function create(ContainerInterface $container, array $configuratio
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['view_to_insert'] = array('default' => '');
-    $options['inherit_arguments'] = array('default' => FALSE);
+    $options['view_to_insert'] = ['default' => ''];
+    $options['inherit_arguments'] = ['default' => FALSE];
     return $options;
   }
 
@@ -79,22 +79,22 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     $view_display = $this->view->storage->id() . ':' . $this->view->current_display;
 
-    $options = array('' => $this->t('-Select-'));
+    $options = ['' => $this->t('-Select-')];
     $options += Views::getViewsAsOptions(FALSE, 'all', $view_display, FALSE, TRUE);
-    $form['view_to_insert'] = array(
+    $form['view_to_insert'] = [
       '#type' => 'select',
       '#title' => $this->t('View to insert'),
       '#default_value' => $this->options['view_to_insert'],
       '#description' => $this->t('The view to insert into this area.'),
       '#options' => $options,
-    );
+    ];
 
-    $form['inherit_arguments'] = array(
+    $form['inherit_arguments'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Inherit contextual filters'),
       '#default_value' => $this->options['inherit_arguments'],
       '#description' => $this->t('If checked, this view will receive the same contextual filters as its parent.'),
-    );
+    ];
   }
 
   /**
@@ -107,7 +107,7 @@ public function render($empty = FALSE) {
       $view = $this->viewStorage->load($view_name)->getExecutable();
 
       if (empty($view) || !$view->access($display_id)) {
-        return array();
+        return [];
       }
       $view->setDisplay($display_id);
 
@@ -118,7 +118,7 @@ public function render($empty = FALSE) {
       // Check if the view is part of the parent views of this view
       $search = "$view_name:$display_id";
       if (in_array($search, $this->view->parent_views)) {
-        drupal_set_message(t("Recursion detected in view @view display @display.", array('@view' => $view_name, '@display' => $display_id)), 'error');
+        drupal_set_message(t("Recursion detected in view @view display @display.", ['@view' => $view_name, '@display' => $display_id]), 'error');
       }
       else {
         if (!empty($this->options['inherit_arguments']) && !empty($this->view->args)) {
@@ -131,7 +131,7 @@ public function render($empty = FALSE) {
         return $output;
       }
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php b/core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php
index 6b8105b106c135bf32671cb8fe31db9aa87a2510..6a9632f4eaa6e8de396cc3ffbd7426961576206a 100644
--- a/core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php
+++ b/core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php
@@ -116,35 +116,35 @@ public function needsStylePlugin() {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['default_action'] = array('default' => 'ignore');
-    $options['exception'] = array(
-      'contains' => array(
-        'value' => array('default' => 'all'),
-        'title_enable' => array('default' => FALSE),
-        'title' => array('default' => 'All'),
-      ),
-    );
-    $options['title_enable'] = array('default' => FALSE);
-    $options['title'] = array('default' => '');
-    $options['default_argument_type'] = array('default' => 'fixed');
-    $options['default_argument_options'] = array('default' => array());
-    $options['default_argument_skip_url'] = array('default' => FALSE);
-    $options['summary_options'] = array('default' => array());
-    $options['summary'] = array(
-      'contains' => array(
-        'sort_order' => array('default' => 'asc'),
-        'number_of_records' => array('default' => 0),
-        'format' => array('default' => 'default_summary'),
-      ),
-    );
-    $options['specify_validation'] = array('default' => FALSE);
-    $options['validate'] = array(
-      'contains' => array(
-        'type' => array('default' => 'none'),
-        'fail' => array('default' => 'not found'),
-      ),
-    );
-    $options['validate_options'] = array('default' => array());
+    $options['default_action'] = ['default' => 'ignore'];
+    $options['exception'] = [
+      'contains' => [
+        'value' => ['default' => 'all'],
+        'title_enable' => ['default' => FALSE],
+        'title' => ['default' => 'All'],
+      ],
+    ];
+    $options['title_enable'] = ['default' => FALSE];
+    $options['title'] = ['default' => ''];
+    $options['default_argument_type'] = ['default' => 'fixed'];
+    $options['default_argument_options'] = ['default' => []];
+    $options['default_argument_skip_url'] = ['default' => FALSE];
+    $options['summary_options'] = ['default' => []];
+    $options['summary'] = [
+      'contains' => [
+        'sort_order' => ['default' => 'asc'],
+        'number_of_records' => ['default' => 0],
+        'format' => ['default' => 'default_summary'],
+      ],
+    ];
+    $options['specify_validation'] = ['default' => FALSE];
+    $options['validate'] = [
+      'contains' => [
+        'type' => ['default' => 'none'],
+        'fail' => ['default' => 'not found'],
+      ],
+    ];
+    $options['validate_options'] = ['default' => []];
 
     return $options;
   }
@@ -154,68 +154,68 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     $argument_text = $this->view->display_handler->getArgumentText();
 
-    $form['#pre_render'][] = array(get_class($this), 'preRenderMoveArgumentOptions');
+    $form['#pre_render'][] = [get_class($this), 'preRenderMoveArgumentOptions'];
 
-    $form['description'] = array(
+    $form['description'] = [
       '#markup' => $argument_text['description'],
-      '#theme_wrappers' => array('container'),
-      '#attributes' => array('class' => array('description')),
-    );
+      '#theme_wrappers' => ['container'],
+      '#attributes' => ['class' => ['description']],
+    ];
 
-    $form['no_argument'] = array(
+    $form['no_argument'] = [
       '#type' => 'details',
       '#title' => $argument_text['filter value not present'],
       '#open' => TRUE,
-    );
+    ];
     // Everything in the details is floated, so the last element needs to
     // clear those floats.
-    $form['no_argument']['clearfix'] = array(
+    $form['no_argument']['clearfix'] = [
       '#weight' => 1000,
       '#markup' => '<div class="clearfix"></div>',
-    );
-    $form['default_action'] = array(
+    ];
+    $form['default_action'] = [
       '#title' => $this->t('Default actions'),
       '#title_display' => 'invisible',
       '#type' => 'radios',
-      '#process' => array(array($this, 'processContainerRadios')),
+      '#process' => [[$this, 'processContainerRadios']],
       '#default_value' => $this->options['default_action'],
       '#fieldset' => 'no_argument',
-    );
+    ];
 
-    $form['exception'] = array(
+    $form['exception'] = [
       '#type' => 'details',
       '#title' => $this->t('Exceptions'),
       '#fieldset' => 'no_argument',
-    );
-    $form['exception']['value'] = array(
+    ];
+    $form['exception']['value'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Exception value'),
       '#size' => 20,
       '#default_value' => $this->options['exception']['value'],
       '#description' => $this->t('If this value is received, the filter will be ignored; i.e, "all values"'),
-    );
-    $form['exception']['title_enable'] = array(
+    ];
+    $form['exception']['title_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Override title'),
       '#default_value' => $this->options['exception']['title_enable'],
-    );
-    $form['exception']['title'] = array(
+    ];
+    $form['exception']['title'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Override title'),
       '#title_display' => 'invisible',
       '#size' => 20,
       '#default_value' => $this->options['exception']['title'],
       '#description' => $this->t('Override the view and other argument titles. You may use Twig syntax in this field as well as the "arguments" and "raw_arguments" arrays.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[exception][title_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-
-    $options = array();
+      '#states' => [
+        'visible' => [
+          ':input[name="options[exception][title_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+
+    $options = [];
     $defaults = $this->defaultActions();
-    $validate_options = array();
+    $validate_options = [];
     foreach ($defaults as $id => $info) {
       $options[$id] = $info['title'];
       if (empty($info['default only'])) {
@@ -227,30 +227,30 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     }
     $form['default_action']['#options'] = $options;
 
-    $form['argument_present'] = array(
+    $form['argument_present'] = [
       '#type' => 'details',
       '#title' => $argument_text['filter value present'],
       '#open' => TRUE,
-    );
-    $form['title_enable'] = array(
+    ];
+    $form['title_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Override title'),
       '#default_value' => $this->options['title_enable'],
       '#fieldset' => 'argument_present',
-    );
-    $form['title'] = array(
+    ];
+    $form['title'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Provide title'),
       '#title_display' => 'invisible',
       '#default_value' => $this->options['title'],
       '#description' => $this->t('Override the view and other argument titles. You may use Twig syntax in this field.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[title_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[title_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'argument_present',
-    );
+    ];
 
     $output = $this->getTokenHelp();
     $form['token_help'] = [
@@ -269,29 +269,29 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       ],
     ];
 
-    $form['specify_validation'] = array(
+    $form['specify_validation'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Specify validation criteria'),
       '#default_value' => $this->options['specify_validation'],
       '#fieldset' => 'argument_present',
-    );
+    ];
 
-    $form['validate'] = array(
+    $form['validate'] = [
       '#type' => 'container',
       '#fieldset' => 'argument_present',
-    );
+    ];
     // Validator options include derivatives with :. These are sanitized for js
     // and reverted on submission.
-    $form['validate']['type'] = array(
+    $form['validate']['type'] = [
       '#type' => 'select',
       '#title' => $this->t('Validator'),
       '#default_value' => static::encodeValidatorId($this->options['validate']['type']),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[specify_validation]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="options[specify_validation]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
 
     $plugins = Views::pluginManager('argument_validator')->getDefinitions();
     foreach ($plugins as $id => $info) {
@@ -320,21 +320,21 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
           if ($plugin->access() || $this->options['validate']['type'] == $id) {
             // Sanitize ID for js.
             $sanitized_id = static::encodeValidatorId($id);
-            $form['validate']['options'][$sanitized_id] = array(
+            $form['validate']['options'][$sanitized_id] = [
               '#prefix' => '<div id="edit-options-validate-options-' . $sanitized_id . '-wrapper">',
               '#suffix' => '</div>',
               '#type' => 'item',
               // Even if the plugin has no options add the key to the form_state.
               '#input' => TRUE, // trick it into checking input to make #process run
-              '#states' => array(
-                'visible' => array(
-                  ':input[name="options[specify_validation]"]' => array('checked' => TRUE),
-                  ':input[name="options[validate][type]"]' => array('value' => $sanitized_id),
-                ),
-              ),
+              '#states' => [
+                'visible' => [
+                  ':input[name="options[specify_validation]"]' => ['checked' => TRUE],
+                  ':input[name="options[validate][type]"]' => ['value' => $sanitized_id],
+                ],
+              ],
               '#id' => 'edit-options-validate-options-' . $sanitized_id,
-              '#default_value' => array(),
-            );
+              '#default_value' => [],
+            ];
             $plugin->buildOptionsForm($form['validate']['options'][$sanitized_id], $form_state);
             $validate_types[$sanitized_id] = $info['title'];
           }
@@ -345,18 +345,18 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     asort($validate_types);
     $form['validate']['type']['#options'] = $validate_types;
 
-    $form['validate']['fail'] = array(
+    $form['validate']['fail'] = [
       '#type' => 'select',
       '#title' => $this->t('Action to take if filter value does not validate'),
       '#default_value' => $this->options['validate']['fail'],
       '#options' => $validate_options,
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[specify_validation]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[specify_validation]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'argument_present',
-    );
+    ];
   }
 
   /**
@@ -370,8 +370,8 @@ protected function getTokenHelp() {
 
     foreach ($this->view->display_handler->getHandlers('argument') as $arg => $handler) {
       /** @var \Drupal\views\Plugin\views\argument\ArgumentPluginBase $handler */
-      $options[(string) t('Arguments')]["{{ arguments.$arg }}"] = $this->t('@argument title', array('@argument' => $handler->adminLabel()));
-      $options[(string) t('Arguments')]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', array('@argument' => $handler->adminLabel()));
+      $options[(string) t('Arguments')]["{{ arguments.$arg }}"] = $this->t('@argument title', ['@argument' => $handler->adminLabel()]);
+      $options[(string) t('Arguments')]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', ['@argument' => $handler->adminLabel()]);
     }
 
     // We have some options, so make a list.
@@ -381,14 +381,14 @@ protected function getTokenHelp() {
       ];
       foreach (array_keys($options) as $type) {
         if (!empty($options[$type])) {
-          $items = array();
+          $items = [];
           foreach ($options[$type] as $key => $value) {
             $items[] = $key . ' == ' . $value;
           }
-          $item_list = array(
+          $item_list = [
             '#theme' => 'item_list',
             '#items' => $items,
-          );
+          ];
           $output[] = $item_list;
         }
       }
@@ -488,38 +488,38 @@ public function submitOptionsForm(&$form, FormStateInterface $form_state) {
    * Override this method to provide additional (or fewer) default behaviors.
    */
   protected function defaultActions($which = NULL) {
-    $defaults = array(
-      'ignore' => array(
+    $defaults = [
+      'ignore' => [
         'title' => $this->t('Display all results for the specified field'),
         'method' => 'defaultIgnore',
-      ),
-      'default' => array(
+      ],
+      'default' => [
         'title' => $this->t('Provide default value'),
         'method' => 'defaultDefault',
         'form method' => 'defaultArgumentForm',
         'has default argument' => TRUE,
         'default only' => TRUE, // this can only be used for missing argument, not validation failure
-      ),
-      'not found' => array(
+      ],
+      'not found' => [
         'title' => $this->t('Hide view'),
         'method' => 'defaultNotFound',
         'hard fail' => TRUE, // This is a hard fail condition
-      ),
-      'summary' => array(
+      ],
+      'summary' => [
         'title' => $this->t('Display a summary'),
         'method' => 'defaultSummary',
         'form method' => 'defaultSummaryForm',
         'style plugin' => TRUE,
-      ),
-      'empty' => array(
+      ],
+      'empty' => [
         'title' => $this->t('Display contents of "No results found"'),
         'method' => 'defaultEmpty',
-      ),
-      'access denied' => array(
+      ],
+      'access denied' => [
         'title' => $this->t('Display "Access Denied"'),
         'method' => 'defaultAccessDenied',
-      ),
-    );
+      ],
+    ];
 
     if ($this->view->display_handler->hasPath()) {
       $defaults['not found']['title'] = $this->t('Show "Page not found"');
@@ -541,31 +541,31 @@ protected function defaultActions($which = NULL) {
    */
   public function defaultArgumentForm(&$form, FormStateInterface $form_state) {
     $plugins = Views::pluginManager('argument_default')->getDefinitions();
-    $options = array();
+    $options = [];
 
-    $form['default_argument_skip_url'] = array(
+    $form['default_argument_skip_url'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Skip default argument for view URL'),
       '#default_value' => $this->options['default_argument_skip_url'],
       '#description' => $this->t('Select whether to include this default argument when constructing the URL for this view. Skipping default arguments is useful e.g. in the case of feeds.')
-    );
+    ];
 
-    $form['default_argument_type'] = array(
+    $form['default_argument_type'] = [
       '#prefix' => '<div id="edit-options-default-argument-type-wrapper">',
       '#suffix' => '</div>',
       '#type' => 'select',
       '#id' => 'edit-options-default-argument-type',
       '#title' => $this->t('Type'),
       '#default_value' => $this->options['default_argument_type'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[default_action]"]' => array('value' => 'default'),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[default_action]"]' => ['value' => 'default'],
+        ],
+      ],
       // Views custom key, moves this element to the appropriate container
       // under the radio button.
       '#argument_option' => 'default',
-    );
+    ];
 
     foreach ($plugins as $id => $info) {
       if (!empty($info['no_ui'])) {
@@ -575,21 +575,21 @@ public function defaultArgumentForm(&$form, FormStateInterface $form_state) {
       if ($plugin) {
         if ($plugin->access() || $this->options['default_argument_type'] == $id) {
           $form['argument_default']['#argument_option'] = 'default';
-          $form['argument_default'][$id] = array(
+          $form['argument_default'][$id] = [
             '#prefix' => '<div id="edit-options-argument-default-options-' . $id . '-wrapper">',
             '#suffix' => '</div>',
             '#id' => 'edit-options-argument-default-options-' . $id,
             '#type' => 'item',
             // Even if the plugin has no options add the key to the form_state.
             '#input' => TRUE,
-            '#states' => array(
-              'visible' => array(
-                ':input[name="options[default_action]"]' => array('value' => 'default'),
-                ':input[name="options[default_argument_type]"]' => array('value' => $id),
-              ),
-            ),
-            '#default_value' => array(),
-          );
+            '#states' => [
+              'visible' => [
+                ':input[name="options[default_action]"]' => ['value' => 'default'],
+                ':input[name="options[default_argument_type]"]' => ['value' => $id],
+              ],
+            ],
+            '#default_value' => [],
+          ];
           $options[$id] = $info['title'];
           $plugin->buildOptionsForm($form['argument_default'][$id], $form_state);
         }
@@ -606,8 +606,8 @@ public function defaultArgumentForm(&$form, FormStateInterface $form_state) {
    */
   public function defaultSummaryForm(&$form, FormStateInterface $form_state) {
     $style_plugins = Views::pluginManager('style')->getDefinitions();
-    $summary_plugins = array();
-    $format_options = array();
+    $summary_plugins = [];
+    $format_options = [];
     foreach ($style_plugins as $key => $plugin) {
       if (isset($plugin['display_types']) && in_array('summary', $plugin['display_types'])) {
         $summary_plugins[$key] = $plugin;
@@ -615,48 +615,48 @@ public function defaultSummaryForm(&$form, FormStateInterface $form_state) {
       }
     }
 
-    $form['summary'] = array(
+    $form['summary'] = [
       // Views custom key, moves this element to the appropriate container
       // under the radio button.
       '#argument_option' => 'summary',
-    );
-    $form['summary']['sort_order'] = array(
+    ];
+    $form['summary']['sort_order'] = [
       '#type' => 'radios',
       '#title' => $this->t('Sort order'),
-      '#options' => array('asc' => $this->t('Ascending'), 'desc' => $this->t('Descending')),
+      '#options' => ['asc' => $this->t('Ascending'), 'desc' => $this->t('Descending')],
       '#default_value' => $this->options['summary']['sort_order'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[default_action]"]' => array('value' => 'summary'),
-        ),
-      ),
-    );
-    $form['summary']['number_of_records'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="options[default_action]"]' => ['value' => 'summary'],
+        ],
+      ],
+    ];
+    $form['summary']['number_of_records'] = [
       '#type' => 'radios',
       '#title' => $this->t('Sort by'),
       '#default_value' => $this->options['summary']['number_of_records'],
-      '#options' => array(
+      '#options' => [
         0 => $this->getSortName(),
         1 => $this->t('Number of records')
-      ),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[default_action]"]' => array('value' => 'summary'),
-        ),
-      ),
-    );
-
-    $form['summary']['format'] = array(
+      ],
+      '#states' => [
+        'visible' => [
+          ':input[name="options[default_action]"]' => ['value' => 'summary'],
+        ],
+      ],
+    ];
+
+    $form['summary']['format'] = [
       '#type' => 'radios',
       '#title' => $this->t('Format'),
       '#options' => $format_options,
       '#default_value' => $this->options['summary']['format'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[default_action]"]' => array('value' => 'summary'),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="options[default_action]"]' => ['value' => 'summary'],
+        ],
+      ],
+    ];
 
     foreach ($summary_plugins as $id => $info) {
       $plugin = $this->getPlugin('style', $id);
@@ -664,20 +664,20 @@ public function defaultSummaryForm(&$form, FormStateInterface $form_state) {
         continue;
       }
       if ($plugin) {
-        $form['summary']['options'][$id] = array(
+        $form['summary']['options'][$id] = [
           '#prefix' => '<div id="edit-options-summary-options-' . $id . '-wrapper">',
           '#suffix' => '</div>',
           '#id' => 'edit-options-summary-options-' . $id,
           '#type' => 'item',
           '#input' => TRUE, // trick it into checking input to make #process run
-          '#states' => array(
-            'visible' => array(
-              ':input[name="options[default_action]"]' => array('value' => 'summary'),
-              ':input[name="options[summary][format]"]' => array('value' => $id),
-            ),
-          ),
-          '#default_value' => array(),
-        );
+          '#states' => [
+            'visible' => [
+              ':input[name="options[default_action]"]' => ['value' => 'summary'],
+              ':input[name="options[summary][format]"]' => ['value' => $id],
+            ],
+          ],
+          '#default_value' => [],
+        ];
         $options[$id] = $info['title'];
         $plugin->buildOptionsForm($form['summary']['options'][$id], $form_state);
       }
@@ -703,7 +703,7 @@ public function defaultAction($info = NULL) {
     }
 
     if (!empty($info['method args'])) {
-      return call_user_func_array(array(&$this, $info['method']), $info['method args']);
+      return call_user_func_array([&$this, $info['method']], $info['method args']);
     }
     else {
       return $this->{$info['method']}();
@@ -760,7 +760,7 @@ public function defaultEmpty() {
     // We return with no query; this will force the empty text.
     $this->view->built = TRUE;
     $this->view->executed = TRUE;
-    $this->view->result = array();
+    $this->view->result = [];
     return FALSE;
   }
 
@@ -897,7 +897,7 @@ public function summaryBasics($count_field = TRUE) {
     // Add the number of nodes counter
     $distinct = ($this->view->display_handler->getOption('distinct') && empty($this->query->no_distinct));
 
-    $count_alias = $this->query->addField($this->view->storage->get('base_table'), $this->view->storage->get('base_field'), 'num_records', array('count' => TRUE, 'distinct' => $distinct));
+    $count_alias = $this->query->addField($this->view->storage->get('base_table'), $this->view->storage->get('base_field'), 'num_records', ['count' => TRUE, 'distinct' => $distinct]);
     $this->query->addGroupBy($this->name_alias);
 
     if ($count_field) {
@@ -1074,7 +1074,7 @@ public function getValue() {
    * Get the display or row plugin, if it exists.
    */
   public function getPlugin($type = 'argument_default', $name = NULL) {
-    $options = array();
+    $options = [];
     switch ($type) {
       case 'argument_default':
         if (!isset($this->options['default_argument_type'])) {
@@ -1127,7 +1127,7 @@ public function getPlugin($type = 'argument_default', $name = NULL) {
    * their argument is (e.g. alphabetical, numeric, date).
    */
   public function getSortName() {
-    return $this->t('Default sort', array(), array('context' => 'Sort order'));
+    return $this->t('Default sort', [], ['context' => 'Sort order']);
   }
 
   /**
@@ -1142,12 +1142,12 @@ public function getSortName() {
   public static function processContainerRadios($element) {
     if (count($element['#options']) > 0) {
       foreach ($element['#options'] as $key => $choice) {
-        $element += array($key => array());
+        $element += [$key => []];
         // Generate the parents as the autogenerator does, so we will have a
         // unique id for each radio button.
-        $parents_for_id = array_merge($element['#parents'], array($key));
+        $parents_for_id = array_merge($element['#parents'], [$key]);
 
-        $element[$key] += array(
+        $element[$key] += [
           '#type' => 'radio',
           '#title' => $choice,
           // The key is sanitized in drupal_attributes() during output from the
@@ -1158,11 +1158,11 @@ public static function processContainerRadios($element) {
           '#parents' => $element['#parents'],
           '#id' => Html::getUniqueId('edit-' . implode('-', $parents_for_id)),
           '#ajax' => isset($element['#ajax']) ? $element['#ajax'] : NULL,
-        );
-        $element[$key . '_options'] = array(
+        ];
+        $element[$key . '_options'] = [
           '#type' => 'container',
-          '#attributes' => array('class' => array('views-admin-dependent')),
-        );
+          '#attributes' => ['class' => ['views-admin-dependent']],
+        ];
       }
     }
     return $element;
diff --git a/core/modules/views/src/Plugin/views/argument/Date.php b/core/modules/views/src/Plugin/views/argument/Date.php
index 8d1dd4010bb68624ff6dbd44f7ce5e4d793a7dd5..a751d561b7dcaa68a2511c75acc715b36dddf415 100644
--- a/core/modules/views/src/Plugin/views/argument/Date.php
+++ b/core/modules/views/src/Plugin/views/argument/Date.php
@@ -85,9 +85,9 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   public function defaultArgumentForm(&$form, FormStateInterface $form_state) {
     parent::defaultArgumentForm($form, $form_state);
-    $form['default_argument_type']['#options'] += array('date' => $this->t('Current date'));
-    $form['default_argument_type']['#options'] += array('node_created' => $this->t("Current node's creation time"));
-    $form['default_argument_type']['#options'] += array('node_changed' => $this->t("Current node's update time"));
+    $form['default_argument_type']['#options'] += ['date' => $this->t('Current date')];
+    $form['default_argument_type']['#options'] += ['node_created' => $this->t("Current node's creation time")];
+    $form['default_argument_type']['#options'] += ['node_changed' => $this->t("Current node's update time")];
   }
 
   /**
@@ -98,7 +98,7 @@ public function getDefaultArgument($raw = FALSE) {
     if (!$raw && $this->options['default_argument_type'] == 'date') {
       return date($this->argFormat, REQUEST_TIME);
     }
-    elseif (!$raw && in_array($this->options['default_argument_type'], array('node_created', 'node_changed'))) {
+    elseif (!$raw && in_array($this->options['default_argument_type'], ['node_created', 'node_changed'])) {
       $node = $this->routeMatch->getParameter('node');
 
       if (!($node instanceof NodeInterface)) {
@@ -119,7 +119,7 @@ public function getDefaultArgument($raw = FALSE) {
    * {@inheritdoc}
    */
   public function getSortName() {
-    return $this->t('Date', array(), array('context' => 'Sort order'));
+    return $this->t('Date', [], ['context' => 'Sort order']);
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/argument/Formula.php b/core/modules/views/src/Plugin/views/argument/Formula.php
index a80074c6b773014e9e5b892d9fd9ff366b945cef..83b33782222c1b70f0958abeb13ff094ad7ad84d 100644
--- a/core/modules/views/src/Plugin/views/argument/Formula.php
+++ b/core/modules/views/src/Plugin/views/argument/Formula.php
@@ -59,9 +59,9 @@ public function query($group_by = FALSE) {
     // Now that our table is secure, get our formula.
     $placeholder = $this->placeholder();
     $formula = $this->getFormula() . ' = ' . $placeholder;
-    $placeholders = array(
+    $placeholders = [
       $placeholder => $this->argument,
-    );
+    ];
     $this->query->addWhere(0, $formula, $placeholders, 'formula');
   }
 
diff --git a/core/modules/views/src/Plugin/views/argument/GroupByNumeric.php b/core/modules/views/src/Plugin/views/argument/GroupByNumeric.php
index 1e7ba38862fdcbd18652a0e1cf2094969dde88f1..64be23ef865d0fa22eb377604dcf417fc0160424 100644
--- a/core/modules/views/src/Plugin/views/argument/GroupByNumeric.php
+++ b/core/modules/views/src/Plugin/views/argument/GroupByNumeric.php
@@ -16,7 +16,7 @@ public function query($group_by = FALSE) {
     $field = $this->getField();
     $placeholder = $this->placeholder();
 
-    $this->query->addHavingExpression(0, "$field = $placeholder", array($placeholder => $this->argument));
+    $this->query->addHavingExpression(0, "$field = $placeholder", [$placeholder => $this->argument]);
   }
 
   public function adminLabel($short = FALSE) {
@@ -27,7 +27,7 @@ public function adminLabel($short = FALSE) {
    * {@inheritdoc}
    */
   public function getSortName() {
-    return $this->t('Numerical', array(), array('context' => 'Sort order'));
+    return $this->t('Numerical', [], ['context' => 'Sort order']);
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/argument/ManyToOne.php b/core/modules/views/src/Plugin/views/argument/ManyToOne.php
index 48385d532e4be38a0e564879c8e50d7c0dc59e26..f0bd9ba68e718988f6b0475fe5ef6173427f082f 100644
--- a/core/modules/views/src/Plugin/views/argument/ManyToOne.php
+++ b/core/modules/views/src/Plugin/views/argument/ManyToOne.php
@@ -34,18 +34,18 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
     // Ensure defaults for these, during summaries and stuff:
     $this->operator = 'or';
-    $this->value = array();
+    $this->value = [];
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
 
     if (!empty($this->definition['numeric'])) {
-      $options['break_phrase'] = array('default' => FALSE);
+      $options['break_phrase'] = ['default' => FALSE];
     }
 
-    $options['add_table'] = array('default' => FALSE);
-    $options['require_value'] = array('default' => FALSE);
+    $options['add_table'] = ['default' => FALSE];
+    $options['require_value'] = ['default' => FALSE];
 
     if (isset($this->helper)) {
       $this->helper->defineOptions($options);
@@ -62,28 +62,28 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
     // allow + for or, , for and
-    $form['break_phrase'] = array(
+    $form['break_phrase'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow multiple values'),
       '#description' => $this->t('If selected, users can enter multiple values in the form of 1+2+3 (for OR) or 1,2,3 (for AND).'),
       '#default_value' => !empty($this->options['break_phrase']),
       '#group' => 'options][more',
-    );
+    ];
 
-    $form['add_table'] = array(
+    $form['add_table'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow multiple filter values to work together'),
       '#description' => $this->t('If selected, multiple instances of this filter can work together, as though multiple values were supplied to the same filter. This setting is not compatible with the "Reduce duplicates" setting.'),
       '#default_value' => !empty($this->options['add_table']),
       '#group' => 'options][more',
-    );
+    ];
 
-    $form['require_value'] = array(
+    $form['require_value'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Do not display items with no value in summary'),
       '#default_value' => !empty($this->options['require_value']),
       '#group' => 'options][more',
-    );
+    ];
 
     $this->helper->buildOptionsForm($form, $form_state);
   }
@@ -119,7 +119,7 @@ public function query($group_by = FALSE) {
       $this->unpackArgumentValue($force_int);
     }
     else {
-      $this->value = array($this->argument);
+      $this->value = [$this->argument];
       $this->operator = 'or';
     }
 
@@ -136,7 +136,7 @@ function title() {
       $this->unpackArgumentValue($force_int);
     }
     else {
-      $this->value = array($this->argument);
+      $this->value = [$this->argument];
       $this->operator = 'or';
     }
 
@@ -146,7 +146,7 @@ function title() {
       return !empty($this->definition['empty field name']) ? $this->definition['empty field name'] : $this->t('Uncategorized');
     }
 
-    if ($this->value === array(-1)) {
+    if ($this->value === [-1]) {
       return !empty($this->definition['invalid input']) ? $this->definition['invalid input'] : $this->t('Invalid input');
     }
 
diff --git a/core/modules/views/src/Plugin/views/argument/NullArgument.php b/core/modules/views/src/Plugin/views/argument/NullArgument.php
index 181fb33c7b719034dbe4f25bfc546c441129c34e..7fadf1688d312ca3c6e2119e7b1c0d42ef1cf620 100644
--- a/core/modules/views/src/Plugin/views/argument/NullArgument.php
+++ b/core/modules/views/src/Plugin/views/argument/NullArgument.php
@@ -15,7 +15,7 @@ class NullArgument extends ArgumentPluginBase {
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['must_not_be'] = array('default' => FALSE);
+    $options['must_not_be'] = ['default' => FALSE];
     return $options;
   }
 
@@ -25,13 +25,13 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['must_not_be'] = array(
+    $form['must_not_be'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Fail basic validation if any argument is given'),
       '#default_value' => !empty($this->options['must_not_be']),
       '#description' => $this->t('By checking this field, you can use this to make sure views with more arguments than necessary fail validation.'),
       '#group' => 'options][more',
-    );
+    ];
 
     unset($form['exception']);
   }
@@ -42,7 +42,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    */
   protected function defaultActions($which = NULL) {
     if ($which) {
-      if (in_array($which, array('ignore', 'not found', 'empty', 'default'))) {
+      if (in_array($which, ['ignore', 'not found', 'empty', 'default'])) {
         return parent::defaultActions($which);
       }
       return;
diff --git a/core/modules/views/src/Plugin/views/argument/NumericArgument.php b/core/modules/views/src/Plugin/views/argument/NumericArgument.php
index c2a829366015e47eae50b7c6bb0261706d0e1b80..188d8e9bd6833bf3f0a0c3d6be2cdeee8ffa276c 100644
--- a/core/modules/views/src/Plugin/views/argument/NumericArgument.php
+++ b/core/modules/views/src/Plugin/views/argument/NumericArgument.php
@@ -30,8 +30,8 @@ class NumericArgument extends ArgumentPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['break_phrase'] = array('default' => FALSE);
-    $options['not'] = array('default' => FALSE);
+    $options['break_phrase'] = ['default' => FALSE];
+    $options['not'] = ['default' => FALSE];
 
     return $options;
   }
@@ -40,21 +40,21 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
     // allow + for or, , for and
-    $form['break_phrase'] = array(
+    $form['break_phrase'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow multiple values'),
       '#description' => $this->t('If selected, users can enter multiple values in the form of 1+2+3 (for OR) or 1,2,3 (for AND).'),
       '#default_value' => !empty($this->options['break_phrase']),
       '#group' => 'options][more',
-    );
+    ];
 
-    $form['not'] = array(
+    $form['not'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Exclude'),
       '#description' => $this->t('If selected, the numbers entered for the filter will be excluded rather than limiting the view.'),
       '#default_value' => !empty($this->options['not']),
       '#group' => 'options][more',
-    );
+    ];
   }
 
   function title() {
@@ -68,7 +68,7 @@ function title() {
       $this->operator = $break->operator;
     }
     else {
-      $this->value = array($this->argument);
+      $this->value = [$this->argument];
       $this->operator = 'or';
     }
 
@@ -76,7 +76,7 @@ function title() {
       return !empty($this->definition['empty field name']) ? $this->definition['empty field name'] : $this->t('Uncategorized');
     }
 
-    if ($this->value === array(-1)) {
+    if ($this->value === [-1]) {
       return !empty($this->definition['invalid input']) ? $this->definition['invalid input'] : $this->t('Invalid input');
     }
 
@@ -101,7 +101,7 @@ public function query($group_by = FALSE) {
       $this->operator = $break->operator;
     }
     else {
-      $this->value = array($this->argument);
+      $this->value = [$this->argument];
     }
 
     $placeholder = $this->placeholder();
@@ -110,11 +110,11 @@ public function query($group_by = FALSE) {
     if (count($this->value) > 1) {
       $operator = empty($this->options['not']) ? 'IN' : 'NOT IN';
       $placeholder .= '[]';
-      $this->query->addWhereExpression(0, "$this->tableAlias.$this->realField $operator($placeholder) $null_check", array($placeholder => $this->value));
+      $this->query->addWhereExpression(0, "$this->tableAlias.$this->realField $operator($placeholder) $null_check", [$placeholder => $this->value]);
     }
     else {
       $operator = empty($this->options['not']) ? '=' : '!=';
-      $this->query->addWhereExpression(0, "$this->tableAlias.$this->realField $operator $placeholder $null_check", array($placeholder => $this->argument));
+      $this->query->addWhereExpression(0, "$this->tableAlias.$this->realField $operator $placeholder $null_check", [$placeholder => $this->argument]);
     }
   }
 
@@ -122,7 +122,7 @@ public function query($group_by = FALSE) {
    * {@inheritdoc}
    */
   public function getSortName() {
-    return $this->t('Numerical', array(), array('context' => 'Sort order'));
+    return $this->t('Numerical', [], ['context' => 'Sort order']);
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/argument/StringArgument.php b/core/modules/views/src/Plugin/views/argument/StringArgument.php
index e138c1d2725518f0f031e5b4cb4f3c452818a4ef..0948c6764611dd48de2e6189a249b57935c1ba4c 100644
--- a/core/modules/views/src/Plugin/views/argument/StringArgument.php
+++ b/core/modules/views/src/Plugin/views/argument/StringArgument.php
@@ -31,23 +31,23 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
       // Ensure defaults for these, during summaries and stuff:
       $this->operator = 'or';
-      $this->value = array();
+      $this->value = [];
     }
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['glossary'] = array('default' => FALSE);
-    $options['limit'] = array('default' => 0);
-    $options['case'] = array('default' => 'none');
-    $options['path_case'] = array('default' => 'none');
-    $options['transform_dash'] = array('default' => FALSE);
-    $options['break_phrase'] = array('default' => FALSE);
+    $options['glossary'] = ['default' => FALSE];
+    $options['limit'] = ['default' => 0];
+    $options['case'] = ['default' => 'none'];
+    $options['path_case'] = ['default' => 'none'];
+    $options['transform_dash'] = ['default' => FALSE];
+    $options['break_phrase'] = ['default' => FALSE];
 
     if (!empty($this->definition['many to one'])) {
-      $options['add_table'] = array('default' => FALSE);
-      $options['require_value'] = array('default' => FALSE);
+      $options['add_table'] = ['default' => FALSE];
+      $options['require_value'] = ['default' => FALSE];
     }
 
     return $options;
@@ -56,89 +56,89 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['glossary'] = array(
+    $form['glossary'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Glossary mode'),
       '#description' => $this->t('Glossary mode applies a limit to the number of characters used in the filter value, which allows the summary view to act as a glossary.'),
       '#default_value' => $this->options['glossary'],
       '#group' => 'options][more',
-    );
+    ];
 
-    $form['limit'] = array(
+    $form['limit'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Character limit'),
       '#description' => $this->t('How many characters of the filter value to filter against. If set to 1, all fields starting with the first letter in the filter value would be matched.'),
       '#default_value' => $this->options['limit'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[glossary]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[glossary]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#group' => 'options][more',
-    );
+    ];
 
-    $form['case'] = array(
+    $form['case'] = [
       '#type' => 'select',
       '#title' => $this->t('Case'),
       '#description' => $this->t('When printing the title and summary, how to transform the case of the filter value.'),
-      '#options' => array(
+      '#options' => [
         'none' => $this->t('No transform'),
         'upper' => $this->t('Upper case'),
         'lower' => $this->t('Lower case'),
         'ucfirst' => $this->t('Capitalize first letter'),
         'ucwords' => $this->t('Capitalize each word'),
-      ),
+      ],
       '#default_value' => $this->options['case'],
       '#group' => 'options][more',
-    );
+    ];
 
-    $form['path_case'] = array(
+    $form['path_case'] = [
       '#type' => 'select',
       '#title' => $this->t('Case in path'),
       '#description' => $this->t('When printing URL paths, how to transform the case of the filter value. Do not use this unless with Postgres as it uses case sensitive comparisons.'),
-      '#options' => array(
+      '#options' => [
         'none' => $this->t('No transform'),
         'upper' => $this->t('Upper case'),
         'lower' => $this->t('Lower case'),
         'ucfirst' => $this->t('Capitalize first letter'),
         'ucwords' => $this->t('Capitalize each word'),
-      ),
+      ],
       '#default_value' => $this->options['path_case'],
       '#group' => 'options][more',
-    );
+    ];
 
-    $form['transform_dash'] = array(
+    $form['transform_dash'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Transform spaces to dashes in URL'),
       '#default_value' => $this->options['transform_dash'],
       '#group' => 'options][more',
-    );
+    ];
 
     if (!empty($this->definition['many to one'])) {
-      $form['add_table'] = array(
+      $form['add_table'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Allow multiple filter values to work together'),
         '#description' => $this->t('If selected, multiple instances of this filter can work together, as though multiple values were supplied to the same filter. This setting is not compatible with the "Reduce duplicates" setting.'),
         '#default_value' => !empty($this->options['add_table']),
         '#group' => 'options][more',
-      );
+      ];
 
-      $form['require_value'] = array(
+      $form['require_value'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Do not display items with no value in summary'),
         '#default_value' => !empty($this->options['require_value']),
         '#group' => 'options][more',
-      );
+      ];
     }
 
     // allow + for or, , for and
-    $form['break_phrase'] = array(
+    $form['break_phrase'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow multiple values'),
       '#description' => $this->t('If selected, users can enter multiple values in the form of 1+2+3 (for OR) or 1,2,3 (for AND).'),
       '#default_value' => !empty($this->options['break_phrase']),
       '#group' => 'options][more',
-    );
+    ];
   }
 
   /**
@@ -206,7 +206,7 @@ public function query($group_by = FALSE) {
       $this->unpackArgumentValue();
     }
     else {
-      $this->value = array($argument);
+      $this->value = [$argument];
       $this->operator = 'or';
     }
 
@@ -253,9 +253,9 @@ public function query($group_by = FALSE) {
       else {
         $field .= ' = ' . $placeholder;
       }
-      $placeholders = array(
+      $placeholders = [
         $placeholder => $argument,
-      );
+      ];
       $this->query->addWhereExpression(0, $field, $placeholders);
     }
     else {
@@ -275,7 +275,7 @@ public function summaryArgument($data) {
    * {@inheritdoc}
    */
   public function getSortName() {
-    return $this->t('Alphabetical', array(), array('context' => 'Sort order'));
+    return $this->t('Alphabetical', [], ['context' => 'Sort order']);
   }
 
   function title() {
@@ -294,7 +294,7 @@ function title() {
       $this->unpackArgumentValue();
     }
     else {
-      $this->value = array($this->argument);
+      $this->value = [$this->argument];
       $this->operator = 'or';
     }
 
@@ -302,7 +302,7 @@ function title() {
       return !empty($this->definition['empty field name']) ? $this->definition['empty field name'] : $this->t('Uncategorized');
     }
 
-    if ($this->value === array(-1)) {
+    if ($this->value === [-1]) {
       return !empty($this->definition['invalid input']) ? $this->definition['invalid input'] : $this->t('Invalid input');
     }
 
diff --git a/core/modules/views/src/Plugin/views/argument/WeekDate.php b/core/modules/views/src/Plugin/views/argument/WeekDate.php
index 73cc2055d009c69aaa5f780dc1c3529e5b36e651..918cfec55b2c1203555831621acc1dc68b2868f2 100644
--- a/core/modules/views/src/Plugin/views/argument/WeekDate.php
+++ b/core/modules/views/src/Plugin/views/argument/WeekDate.php
@@ -19,7 +19,7 @@ class WeekDate extends Date {
    */
   public function summaryName($data) {
     $created = $data->{$this->name_alias};
-    return $this->t('Week @week', array('@week' => $created));
+    return $this->t('Week @week', ['@week' => $created]);
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/argument_default/ArgumentDefaultPluginBase.php b/core/modules/views/src/Plugin/views/argument_default/ArgumentDefaultPluginBase.php
index c3b1c86c5f0382b55bc1e75f68e06ee08552167e..6cea74d4a0ddf7936ff5b36e924bb98ba01aa87c 100644
--- a/core/modules/views/src/Plugin/views/argument_default/ArgumentDefaultPluginBase.php
+++ b/core/modules/views/src/Plugin/views/argument_default/ArgumentDefaultPluginBase.php
@@ -58,7 +58,7 @@ public function setArgument(ArgumentPluginBase $argument) {
    * Retrieve the options when this is a new access
    * control plugin
    */
-  protected function defineOptions() { return array(); }
+  protected function defineOptions() { return []; }
 
   /**
    * Provide the default form for setting options.
@@ -73,7 +73,7 @@ public function validateOptionsForm(&$form, FormStateInterface $form_state) { }
   /**
    * Provide the default form form for submitting options
    */
-  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = array()) { }
+  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = []) { }
 
   /**
    * Determine if the administrator has the privileges to use this
diff --git a/core/modules/views/src/Plugin/views/argument_default/Fixed.php b/core/modules/views/src/Plugin/views/argument_default/Fixed.php
index 317708aad23ff1f43192f264365a1e7d7e6e5719..da08e561f0fa06cbcca66736a99a3ba368390c83 100644
--- a/core/modules/views/src/Plugin/views/argument_default/Fixed.php
+++ b/core/modules/views/src/Plugin/views/argument_default/Fixed.php
@@ -23,7 +23,7 @@ class Fixed extends ArgumentDefaultPluginBase implements CacheableDependencyInte
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['argument'] = array('default' => '');
+    $options['argument'] = ['default' => ''];
 
     return $options;
   }
@@ -33,11 +33,11 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['argument'] = array(
+    $form['argument'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Fixed value'),
       '#default_value' => $this->options['argument'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/argument_default/QueryParameter.php b/core/modules/views/src/Plugin/views/argument_default/QueryParameter.php
index e5b5e201a9e0e924203454f39ea01c78adab1b08..1b45615fd83fab31d7ff734ba8a69c6d1f89b1fa 100644
--- a/core/modules/views/src/Plugin/views/argument_default/QueryParameter.php
+++ b/core/modules/views/src/Plugin/views/argument_default/QueryParameter.php
@@ -23,9 +23,9 @@ class QueryParameter extends ArgumentDefaultPluginBase implements CacheableDepen
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['query_param'] = array('default' => '');
-    $options['fallback'] = array('default' => '');
-    $options['multiple'] = array('default' => 'and');
+    $options['query_param'] = ['default' => ''];
+    $options['fallback'] = ['default' => ''];
+    $options['multiple'] = ['default' => 'and'];
 
     return $options;
   }
@@ -35,28 +35,28 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['query_param'] = array(
+    $form['query_param'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Query parameter'),
       '#description' => $this->t('The query parameter to use.'),
       '#default_value' => $this->options['query_param'],
-    );
-    $form['fallback'] = array(
+    ];
+    $form['fallback'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Fallback value'),
       '#description' => $this->t('The fallback value to use when the above query parameter is not present.'),
       '#default_value' => $this->options['fallback'],
-    );
-    $form['multiple'] = array(
+    ];
+    $form['multiple'] = [
       '#type' => 'radios',
       '#title' => $this->t('Multiple values'),
       '#description' => $this->t('Conjunction to use when handling multiple values. E.g. "?value[0]=a&value[1]=b".'),
       '#default_value' => $this->options['multiple'],
-      '#options' => array(
+      '#options' => [
         'and' => $this->t('AND'),
         'or' => $this->t('OR'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/argument_default/Raw.php b/core/modules/views/src/Plugin/views/argument_default/Raw.php
index 8dd327334704b4487b2b3aad34064493b0aab22f..2491bd83c0da76f1d1494fb74e58aaf5d432121a 100644
--- a/core/modules/views/src/Plugin/views/argument_default/Raw.php
+++ b/core/modules/views/src/Plugin/views/argument_default/Raw.php
@@ -74,8 +74,8 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['index'] = array('default' => '');
-    $options['use_alias'] = array('default' => FALSE);
+    $options['index'] = ['default' => ''];
+    $options['use_alias'] = ['default' => FALSE];
 
     return $options;
   }
@@ -85,7 +85,7 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['index'] = array(
+    $form['index'] = [
       '#type' => 'select',
       '#title' => $this->t('Path component'),
       '#default_value' => $this->options['index'],
@@ -94,13 +94,13 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       // - values that count from 1 for display to humans.
       '#options' => range(1, 10),
       '#description' => $this->t('The numbering starts from 1, e.g. on the page admin/structure/types, the 3rd path component is "types".'),
-    );
-    $form['use_alias'] = array(
+    ];
+    $form['use_alias'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Use path alias'),
       '#default_value' => $this->options['use_alias'],
       '#description' => $this->t('Use path alias instead of internal path.'),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/argument_validator/ArgumentValidatorPluginBase.php b/core/modules/views/src/Plugin/views/argument_validator/ArgumentValidatorPluginBase.php
index c1d41d494ab10dc43036712aa38aad9447481e4e..5f40430d2be9b0af0d804f1f44c8464014de9d94 100644
--- a/core/modules/views/src/Plugin/views/argument_validator/ArgumentValidatorPluginBase.php
+++ b/core/modules/views/src/Plugin/views/argument_validator/ArgumentValidatorPluginBase.php
@@ -53,7 +53,7 @@ public function setArgument(ArgumentPluginBase $argument) {
   /**
    * Retrieves the options when this is a new access control plugin.
    */
-  protected function defineOptions() { return array(); }
+  protected function defineOptions() { return []; }
 
   /**
    * Provides the default form for setting options.
@@ -68,7 +68,7 @@ public function validateOptionsForm(&$form, FormStateInterface $form_state) { }
   /**
    * Provides the default form for submitting options.
    */
-  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = array()) { }
+  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = []) { }
 
   /**
    * Determines if the administrator has the privileges to use this plugin.
diff --git a/core/modules/views/src/Plugin/views/argument_validator/Entity.php b/core/modules/views/src/Plugin/views/argument_validator/Entity.php
index 5a963bab35a878f45cc78a7e12014b23594834d3..896d24bf64c994941ae30bad661e12992f53d981 100644
--- a/core/modules/views/src/Plugin/views/argument_validator/Entity.php
+++ b/core/modules/views/src/Plugin/views/argument_validator/Entity.php
@@ -71,10 +71,10 @@ public static function create(ContainerInterface $container, array $configuratio
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['bundles'] = array('default' => array());
-    $options['access'] = array('default' => FALSE);
-    $options['operation'] = array('default' => 'view');
-    $options['multiple'] = array('default' => FALSE);
+    $options['bundles'] = ['default' => []];
+    $options['access'] = ['default' => FALSE];
+    $options['operation'] = ['default' => 'view'];
+    $options['multiple'] = ['default' => FALSE];
 
     return $options;
   }
@@ -93,60 +93,60 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     // If the entity has bundles, allow option to restrict to bundle(s).
     if ($entity_type->hasKey('bundle')) {
-      $bundle_options = array();
+      $bundle_options = [];
       foreach ($this->entityManager->getBundleInfo($entity_type_id) as $bundle_id => $bundle_info) {
         $bundle_options[$bundle_id] = $bundle_info['label'];
       }
 
-      $form['bundles'] = array(
+      $form['bundles'] = [
         '#title' => $entity_type->getBundleLabel() ?: $this->t('Bundles'),
         '#default_value' => $this->options['bundles'],
         '#type' => 'checkboxes',
         '#options' => $bundle_options,
         '#description' => $this->t('If none are selected, all are allowed.'),
-      );
+      ];
     }
 
     // Offer the option to filter by access to the entity in the argument.
-    $form['access'] = array(
+    $form['access'] = [
       '#type' => 'checkbox',
-      '#title' => $this->t('Validate user has access to the %name', array('%name' => $entity_type->getLabel())),
+      '#title' => $this->t('Validate user has access to the %name', ['%name' => $entity_type->getLabel()]),
       '#default_value' => $this->options['access'],
-    );
-    $form['operation'] = array(
+    ];
+    $form['operation'] = [
       '#type' => 'radios',
       '#title' => $this->t('Access operation to check'),
-      '#options' => array(
+      '#options' => [
         'view' => $this->t('View'),
         'update' => $this->t('Edit'),
         'delete' => $this->t('Delete'),
-      ),
+      ],
       '#default_value' => $this->options['operation'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[validate][options][' . $sanitized_id . '][access]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="options[validate][options][' . $sanitized_id . '][access]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
 
     // If class is multiple capable give the option to validate single/multiple.
     if ($this->multipleCapable) {
-      $form['multiple'] = array(
+      $form['multiple'] = [
         '#type' => 'radios',
         '#title' => $this->t('Multiple arguments'),
-        '#options' => array(
-          0 => $this->t('Single ID', array('%type' => $entity_type->getLabel())),
-          1 => $this->t('One or more IDs separated by , or +', array('%type' => $entity_type->getLabel())),
-        ),
+        '#options' => [
+          0 => $this->t('Single ID', ['%type' => $entity_type->getLabel()]),
+          1 => $this->t('One or more IDs separated by , or +', ['%type' => $entity_type->getLabel()]),
+        ],
         '#default_value' => (string) $this->options['multiple'],
-      );
+      ];
     }
   }
 
   /**
    * {@inheritdoc}
    */
-  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = array()) {
+  public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = []) {
     // Filter out unused options so we don't store giant unnecessary arrays.
     $options['bundles'] = array_filter($options['bundles']);
   }
@@ -163,7 +163,7 @@ public function validateArgument($argument) {
       $ids = array_filter(preg_split('/[,+ ]/', $argument));
     }
     elseif ($argument) {
-      $ids = array($argument);
+      $ids = [$argument];
     }
     // No specified argument should be invalid.
     else {
diff --git a/core/modules/views/src/Plugin/views/cache/CachePluginBase.php b/core/modules/views/src/Plugin/views/cache/CachePluginBase.php
index 3b79c69d75172ca00b34c9dbc8cb4fc5db1ba1c7..36b8e19c9c1a9d9517491ceb0a4ae81f518823dc 100644
--- a/core/modules/views/src/Plugin/views/cache/CachePluginBase.php
+++ b/core/modules/views/src/Plugin/views/cache/CachePluginBase.php
@@ -31,7 +31,7 @@ abstract class CachePluginBase extends PluginBase {
   /**
    * Contains all data that should be written/read from cache.
    */
-  public $storage = array();
+  public $storage = [];
 
   /**
    * Which cache bin to store query results in.
@@ -104,11 +104,11 @@ public function cacheSet($type) {
         // Not supported currently, but this is certainly where we'd put it.
         break;
       case 'results':
-        $data = array(
+        $data = [
           'result' => $this->prepareViewResult($this->view->result),
           'total_rows' => isset($this->view->total_rows) ? $this->view->total_rows : 0,
           'current_page' => $this->view->getCurrentPage(),
-        );
+        ];
         $expire = ($this->cacheSetMaxAge($type) === Cache::PERMANENT) ? Cache::PERMANENT : (int) $this->view->getRequest()->server->get('REQUEST_TIME') + $this->cacheSetMaxAge($type);
         \Drupal::cache($this->resultsBin)->set($this->generateResultsKey(), $data, $expire, $this->getCacheTags());
         break;
@@ -183,16 +183,16 @@ public function generateResultsKey() {
     if (!isset($this->resultsKey)) {
       $build_info = $this->view->build_info;
 
-      foreach (array('query', 'count_query') as $index) {
+      foreach (['query', 'count_query'] as $index) {
         // If the default query back-end is used generate SQL query strings from
         // the query objects.
         if ($build_info[$index] instanceof Select) {
           $query = clone $build_info[$index];
           $query->preExecute();
-          $build_info[$index] = array(
+          $build_info[$index] = [
             'query' => (string)$query,
             'arguments' => $query->getArguments(),
-          );
+          ];
         }
       }
 
diff --git a/core/modules/views/src/Plugin/views/cache/Time.php b/core/modules/views/src/Plugin/views/cache/Time.php
index 601fbac9f7ccfb042632a6c3811d724a196b0405..962693d9214d090236076ac8d68998ec07d2542f 100644
--- a/core/modules/views/src/Plugin/views/cache/Time.php
+++ b/core/modules/views/src/Plugin/views/cache/Time.php
@@ -76,64 +76,64 @@ public static function create(ContainerInterface $container, array $configuratio
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['results_lifespan'] = array('default' => 3600);
-    $options['results_lifespan_custom'] = array('default' => 0);
-    $options['output_lifespan'] = array('default' => 3600);
-    $options['output_lifespan_custom'] = array('default' => 0);
+    $options['results_lifespan'] = ['default' => 3600];
+    $options['results_lifespan_custom'] = ['default' => 0];
+    $options['output_lifespan'] = ['default' => 3600];
+    $options['output_lifespan_custom'] = ['default' => 0];
 
     return $options;
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $options = array(60, 300, 1800, 3600, 21600, 518400);
-    $options = array_map(array($this->dateFormatter, 'formatInterval'), array_combine($options, $options));
-    $options = array(0 => $this->t('Never cache')) + $options + array('custom' => $this->t('Custom'));
+    $options = [60, 300, 1800, 3600, 21600, 518400];
+    $options = array_map([$this->dateFormatter, 'formatInterval'], array_combine($options, $options));
+    $options = [0 => $this->t('Never cache')] + $options + ['custom' => $this->t('Custom')];
 
-    $form['results_lifespan'] = array(
+    $form['results_lifespan'] = [
       '#type' => 'select',
       '#title' => $this->t('Query results'),
       '#description' => $this->t('The length of time raw query results should be cached.'),
       '#options' => $options,
       '#default_value' => $this->options['results_lifespan'],
-    );
-    $form['results_lifespan_custom'] = array(
+    ];
+    $form['results_lifespan_custom'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Seconds'),
       '#size' => '25',
       '#maxlength' => '30',
       '#description' => $this->t('Length of time in seconds raw query results should be cached.'),
       '#default_value' => $this->options['results_lifespan_custom'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="cache_options[results_lifespan]"]' => array('value' => 'custom'),
-        ),
-      ),
-    );
-    $form['output_lifespan'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="cache_options[results_lifespan]"]' => ['value' => 'custom'],
+        ],
+      ],
+    ];
+    $form['output_lifespan'] = [
       '#type' => 'select',
       '#title' => $this->t('Rendered output'),
       '#description' => $this->t('The length of time rendered HTML output should be cached.'),
       '#options' => $options,
       '#default_value' => $this->options['output_lifespan'],
-    );
-    $form['output_lifespan_custom'] = array(
+    ];
+    $form['output_lifespan_custom'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Seconds'),
       '#size' => '25',
       '#maxlength' => '30',
       '#description' => $this->t('Length of time in seconds rendered HTML output should be cached.'),
       '#default_value' => $this->options['output_lifespan_custom'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="cache_options[output_lifespan]"]' => array('value' => 'custom'),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="cache_options[output_lifespan]"]' => ['value' => 'custom'],
+        ],
+      ],
+    ];
   }
 
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
-    $custom_fields = array('output_lifespan', 'results_lifespan');
+    $custom_fields = ['output_lifespan', 'results_lifespan'];
     foreach ($custom_fields as $field) {
       $cache_options = $form_state->getValue('cache_options');
       if ($cache_options[$field] == 'custom' && !is_numeric($cache_options[$field . '_custom'])) {
diff --git a/core/modules/views/src/Plugin/views/display/Attachment.php b/core/modules/views/src/Plugin/views/display/Attachment.php
index 6171525a2d75d70f6fa233d3ccf0db66af832397..315ab59513452d76515f5447a2bb630d5b84fbfd 100644
--- a/core/modules/views/src/Plugin/views/display/Attachment.php
+++ b/core/modules/views/src/Plugin/views/display/Attachment.php
@@ -34,12 +34,12 @@ class Attachment extends DisplayPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['displays'] = array('default' => array());
-    $options['attachment_position'] = array('default' => 'before');
-    $options['inherit_arguments'] = array('default' => TRUE);
-    $options['inherit_exposed_filters'] = array('default' => FALSE);
-    $options['inherit_pager'] = array('default' => FALSE);
-    $options['render_pager'] = array('default' => FALSE);
+    $options['displays'] = ['default' => []];
+    $options['attachment_position'] = ['default' => 'before'];
+    $options['inherit_arguments'] = ['default' => TRUE];
+    $options['inherit_exposed_filters'] = ['default' => FALSE];
+    $options['inherit_pager'] = ['default' => FALSE];
+    $options['render_pager'] = ['default' => FALSE];
 
     return $options;
   }
@@ -49,11 +49,11 @@ public function execute() {
   }
 
   public function attachmentPositions($position = NULL) {
-    $positions = array(
+    $positions = [
       'before' => $this->t('Before'),
       'after' => $this->t('After'),
       'both' => $this->t('Both'),
-    );
+    ];
 
     if ($position) {
       return $positions[$position];
@@ -71,13 +71,13 @@ public function optionsSummary(&$categories, &$options) {
     // It is very important to call the parent function here:
     parent::optionsSummary($categories, $options);
 
-    $categories['attachment'] = array(
+    $categories['attachment'] = [
       'title' => $this->t('Attachment settings'),
       'column' => 'second',
-      'build' => array(
+      'build' => [
         '#weight' => -10,
-      ),
-    );
+      ],
+    ];
 
     $displays = array_filter($this->getOption('displays'));
     if (count($displays) > 1) {
@@ -94,41 +94,41 @@ public function optionsSummary(&$categories, &$options) {
       $attach_to = $this->t('Not defined');
     }
 
-    $options['displays'] = array(
+    $options['displays'] = [
       'category' => 'attachment',
       'title' => $this->t('Attach to'),
       'value' => $attach_to,
-    );
+    ];
 
-    $options['attachment_position'] = array(
+    $options['attachment_position'] = [
       'category' => 'attachment',
       'title' => $this->t('Attachment position'),
       'value' => $this->attachmentPositions($this->getOption('attachment_position')),
-    );
+    ];
 
-    $options['inherit_arguments'] = array(
+    $options['inherit_arguments'] = [
       'category' => 'attachment',
       'title' => $this->t('Inherit contextual filters'),
       'value' => $this->getOption('inherit_arguments') ? $this->t('Yes') : $this->t('No'),
-    );
+    ];
 
-    $options['inherit_exposed_filters'] = array(
+    $options['inherit_exposed_filters'] = [
       'category' => 'attachment',
       'title' => $this->t('Inherit exposed filters'),
       'value' => $this->getOption('inherit_exposed_filters') ? $this->t('Yes') : $this->t('No'),
-    );
+    ];
 
-    $options['inherit_pager'] = array(
+    $options['inherit_pager'] = [
       'category' => 'pager',
       'title' => $this->t('Inherit pager'),
       'value' => $this->getOption('inherit_pager') ? $this->t('Yes') : $this->t('No'),
-    );
+    ];
 
-    $options['render_pager'] = array(
+    $options['render_pager'] = [
       'category' => 'pager',
       'title' => $this->t('Render pager'),
       'value' => $this->getOption('render_pager') ? $this->t('Yes') : $this->t('No'),
-    );
+    ];
 
   }
 
@@ -142,65 +142,65 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     switch ($form_state->get('section')) {
       case 'inherit_arguments':
         $form['#title'] .= $this->t('Inherit contextual filters');
-        $form['inherit_arguments'] = array(
+        $form['inherit_arguments'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Inherit'),
           '#description' => $this->t('Should this display inherit its contextual filter values from the parent display to which it is attached?'),
           '#default_value' => $this->getOption('inherit_arguments'),
-        );
+        ];
         break;
       case 'inherit_exposed_filters':
         $form['#title'] .= $this->t('Inherit exposed filters');
-        $form['inherit_exposed_filters'] = array(
+        $form['inherit_exposed_filters'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Inherit'),
           '#description' => $this->t('Should this display inherit its exposed filter values from the parent display to which it is attached?'),
           '#default_value' => $this->getOption('inherit_exposed_filters'),
-        );
+        ];
         break;
       case 'inherit_pager':
         $form['#title'] .= $this->t('Inherit pager');
-        $form['inherit_pager'] = array(
+        $form['inherit_pager'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Inherit'),
           '#description' => $this->t('Should this display inherit its paging values from the parent display to which it is attached?'),
           '#default_value' => $this->getOption('inherit_pager'),
-        );
+        ];
         break;
       case 'render_pager':
         $form['#title'] .= $this->t('Render pager');
-        $form['render_pager'] = array(
+        $form['render_pager'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Render'),
           '#description' => $this->t('Should this display render the pager values? This is only meaningful if inheriting a pager.'),
           '#default_value' => $this->getOption('render_pager'),
-        );
+        ];
         break;
       case 'attachment_position':
         $form['#title'] .= $this->t('Position');
-        $form['attachment_position'] = array(
+        $form['attachment_position'] = [
           '#title' => $this->t('Position'),
           '#type' => 'radios',
           '#description' => $this->t('Attach before or after the parent display?'),
           '#options' => $this->attachmentPositions(),
           '#default_value' => $this->getOption('attachment_position'),
-        );
+        ];
         break;
       case 'displays':
         $form['#title'] .= $this->t('Attach to');
-        $displays = array();
+        $displays = [];
         foreach ($this->view->storage->get('display') as $display_id => $display) {
           if ($this->view->displayHandlers->has($display_id) && $this->view->displayHandlers->get($display_id)->acceptAttachments()) {
             $displays[$display_id] = $display['display_title'];
           }
         }
-        $form['displays'] = array(
+        $form['displays'] = [
           '#title' => $this->t('Displays'),
           '#type' => 'checkboxes',
           '#description' => $this->t('Select which display or displays this should attach to.'),
           '#options' => array_map('\Drupal\Component\Utility\Html::escape', $displays),
           '#default_value' => $this->getOption('displays'),
-        );
+        ];
         break;
     }
   }
@@ -240,7 +240,7 @@ public function attachTo(ViewExecutable $view, $display_id, array &$build) {
       return;
     }
 
-    $args = $this->getOption('inherit_arguments') ? $this->view->args : array();
+    $args = $this->getOption('inherit_arguments') ? $this->view->args : [];
     $view->setArguments($args);
     $view->setDisplay($this->display['id']);
     if ($this->getOption('inherit_pager')) {
diff --git a/core/modules/views/src/Plugin/views/display/Block.php b/core/modules/views/src/Plugin/views/display/Block.php
index 5cc04a790d75573843f9073fcd934869ae14a7a1..5e833d752a5776d7377c6ba7357148ae81397176 100644
--- a/core/modules/views/src/Plugin/views/display/Block.php
+++ b/core/modules/views/src/Plugin/views/display/Block.php
@@ -78,15 +78,15 @@ public static function create(ContainerInterface $container, array $configuratio
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['block_description'] = array('default' => '');
-    $options['block_category'] = array('default' => $this->t('Lists (Views)'));
-    $options['block_hide_empty'] = array('default' => FALSE);
-
-    $options['allow'] = array(
-      'contains' => array(
-        'items_per_page' => array('default' => 'items_per_page'),
-      ),
-    );
+    $options['block_description'] = ['default' => ''];
+    $options['block_category'] = ['default' => $this->t('Lists (Views)')];
+    $options['block_hide_empty'] = ['default' => FALSE];
+
+    $options['allow'] = [
+      'contains' => [
+        'items_per_page' => ['default' => 'items_per_page'],
+      ],
+    ];
 
     return $options;
   }
@@ -116,7 +116,7 @@ public function execute() {
     // display, and arguments should be set on the view.
     $element = $this->view->render();
     if ($this->outputIsEmpty() && $this->getOption('block_hide_empty') && empty($this->view->style_plugin->definition['even empty'])) {
-      return array();
+      return [];
     }
     else {
       return $element;
@@ -131,13 +131,13 @@ public function execute() {
   public function optionsSummary(&$categories, &$options) {
     parent::optionsSummary($categories, $options);
 
-    $categories['block'] = array(
+    $categories['block'] = [
       'title' => $this->t('Block settings'),
       'column' => 'second',
-      'build' => array(
+      'build' => [
         '#weight' => -10,
-      ),
-    );
+      ],
+    ];
 
     $block_description = strip_tags($this->getOption('block_description'));
     if (empty($block_description)) {
@@ -145,30 +145,30 @@ public function optionsSummary(&$categories, &$options) {
     }
     $block_category = $this->getOption('block_category');
 
-    $options['block_description'] = array(
+    $options['block_description'] = [
       'category' => 'block',
       'title' => $this->t('Block name'),
       'value' => views_ui_truncate($block_description, 24),
-    );
-    $options['block_category'] = array(
+    ];
+    $options['block_category'] = [
       'category' => 'block',
       'title' => $this->t('Block category'),
       'value' => views_ui_truncate($block_category, 24),
-    );
+    ];
 
     $filtered_allow = array_filter($this->getOption('allow'));
 
-    $options['allow'] = array(
+    $options['allow'] = [
       'category' => 'block',
       'title' => $this->t('Allow settings'),
       'value' => empty($filtered_allow) ? $this->t('None') : $this->t('Items per page'),
-    );
+    ];
 
-    $options['block_hide_empty'] = array(
+    $options['block_hide_empty'] = [
       'category' => 'other',
       'title' => $this->t('Hide block if the view output is empty'),
       'value' => $this->getOption('block_hide_empty') ? $this->t('Yes') : $this->t('No'),
-    );
+    ];
   }
 
   /**
@@ -180,53 +180,53 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     switch ($form_state->get('section')) {
       case 'block_description':
         $form['#title'] .= $this->t('Block admin description');
-        $form['block_description'] = array(
+        $form['block_description'] = [
           '#type' => 'textfield',
           '#description' => $this->t('This will appear as the name of this block in administer >> structure >> blocks.'),
           '#default_value' => $this->getOption('block_description'),
-        );
+        ];
         break;
       case 'block_category':
         $form['#title'] .= $this->t('Block category');
-        $form['block_category'] = array(
+        $form['block_category'] = [
           '#type' => 'textfield',
           '#autocomplete_route_name' => 'block.category_autocomplete',
-          '#description' => $this->t('The category this block will appear under on the <a href=":href">blocks placement page</a>.', array(':href' => \Drupal::url('block.admin_display'))),
+          '#description' => $this->t('The category this block will appear under on the <a href=":href">blocks placement page</a>.', [':href' => \Drupal::url('block.admin_display')]),
           '#default_value' => $this->getOption('block_category'),
-        );
+        ];
         break;
       case 'block_hide_empty':
         $form['#title'] .= $this->t('Block empty settings');
 
-        $form['block_hide_empty'] = array(
+        $form['block_hide_empty'] = [
           '#title' => $this->t('Hide block if no result/empty text'),
           '#type' => 'checkbox',
           '#description' => $this->t('Hide the block if there is no result and no empty text and no header/footer which is shown on empty result'),
           '#default_value' => $this->getOption('block_hide_empty'),
-        );
+        ];
         break;
       case 'exposed_form_options':
         $this->view->initHandlers();
         if (!$this->usesExposed() && parent::usesExposed()) {
-          $form['exposed_form_options']['warning'] = array(
+          $form['exposed_form_options']['warning'] = [
             '#weight' => -10,
             '#markup' => '<div class="messages messages--warning">' . $this->t('Exposed filters in block displays require "Use AJAX" to be set to work correctly.') . '</div>',
-          );
+          ];
         }
         break;
       case 'allow':
         $form['#title'] .= $this->t('Allow settings in the block configuration');
 
-        $options = array(
+        $options = [
           'items_per_page' => $this->t('Items per page'),
-        );
+        ];
 
         $allow = array_filter($this->getOption('allow'));
-        $form['allow'] = array(
+        $form['allow'] = [
           '#type' => 'checkboxes',
           '#default_value' => $allow,
           '#options' => $options,
-        );
+        ];
         break;
     }
   }
@@ -276,18 +276,18 @@ public function blockForm(ViewsBlock $block, array &$form, FormStateInterface $f
       }
       switch ($type) {
         case 'items_per_page':
-          $form['override']['items_per_page'] = array(
+          $form['override']['items_per_page'] = [
             '#type' => 'select',
             '#title' => $this->t('Items per block'),
-            '#options' => array(
-              'none' => $this->t('@count (default setting)', array('@count' => $this->getPlugin('pager')->getItemsPerPage())),
+            '#options' => [
+              'none' => $this->t('@count (default setting)', ['@count' => $this->getPlugin('pager')->getItemsPerPage()]),
               5 => 5,
               10 => 10,
               20 => 20,
               40 => 40,
-            ),
+            ],
             '#default_value' => $block_configuration['items_per_page'],
-          );
+          ];
           break;
       }
     }
@@ -323,10 +323,10 @@ public function blockValidate(ViewsBlock $block, array $form, FormStateInterface
    * @see \Drupal\views\Plugin\Block\ViewsBlock::blockSubmit()
    */
   public function blockSubmit(ViewsBlock $block, $form, FormStateInterface $form_state) {
-    if ($items_per_page = $form_state->getValue(array('override', 'items_per_page'))) {
+    if ($items_per_page = $form_state->getValue(['override', 'items_per_page'])) {
       $block->setConfigurationValue('items_per_page', $items_per_page);
     }
-    $form_state->unsetValue(array('override', 'items_per_page'));
+    $form_state->unsetValue(['override', 'items_per_page']);
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/display/DisplayPluginBase.php b/core/modules/views/src/Plugin/views/display/DisplayPluginBase.php
index c8b07ea1e08b30d59470d9a8d553377d31b40041..c16ee3b65febb1d252acb5f1d1a2873ba7251502 100644
--- a/core/modules/views/src/Plugin/views/display/DisplayPluginBase.php
+++ b/core/modules/views/src/Plugin/views/display/DisplayPluginBase.php
@@ -44,7 +44,7 @@ abstract class DisplayPluginBase extends PluginBase implements DisplayPluginInte
    *
    * @var \Drupal\views\Plugin\views\ViewsPluginInterface[]
    */
-  protected $plugins = array();
+  protected $plugins = [];
 
   /**
    * Stores all available display extenders.
@@ -107,7 +107,7 @@ abstract class DisplayPluginBase extends PluginBase implements DisplayPluginInte
    *
    * @var array
    */
-  protected static $unpackOptions = array();
+  protected static $unpackOptions = [];
 
   /**
    * The display information coming directly from the view entity.
@@ -139,7 +139,7 @@ abstract class DisplayPluginBase extends PluginBase implements DisplayPluginInte
    *   The plugin implementation definition.
    */
   public function __construct(array $configuration, $plugin_id, $plugin_definition) {
-    parent::__construct(array(), $plugin_id, $plugin_definition);
+    parent::__construct([], $plugin_id, $plugin_definition);
   }
 
   /**
@@ -150,7 +150,7 @@ public function initDisplay(ViewExecutable $view, array &$display, array &$optio
 
     // Load extenders as soon as possible.
     $display['display_options'] += ['display_extenders' => []];
-    $this->extenders = array();
+    $this->extenders = [];
     if ($extenders = Views::getEnabledDisplayExtenders()) {
       $manager = Views::pluginManager('display_extender');
       $display_extender_options = $display['display_options']['display_extenders'];
@@ -182,7 +182,7 @@ public function initDisplay(ViewExecutable $view, array &$display, array &$optio
     $skip_cache = \Drupal::config('views.settings')->get('skip_cache');
 
     if (empty($view->editing) || !$skip_cache) {
-      $cid = 'views:unpack_options:' . hash('sha256', serialize(array($this->options, $options))) . ':' . \Drupal::languageManager()->getCurrentLanguage()->getId();
+      $cid = 'views:unpack_options:' . hash('sha256', serialize([$this->options, $options])) . ':' . \Drupal::languageManager()->getCurrentLanguage()->getId();
       if (empty(static::$unpackOptions[$cid])) {
         $cache = \Drupal::cache('data')->get($cid);
         if (!empty($cache->data)) {
@@ -400,40 +400,40 @@ public function attachTo(ViewExecutable $view, $display_id, array &$build) { }
    * {@inheritdoc}
    */
   public function defaultableSections($section = NULL) {
-    $sections = array(
-      'access' => array('access'),
-      'cache' => array('cache'),
-      'title' => array('title'),
-      'css_class' => array('css_class'),
-      'use_ajax' => array('use_ajax'),
-      'hide_attachment_summary' => array('hide_attachment_summary'),
-      'show_admin_links' => array('show_admin_links'),
-      'group_by' => array('group_by'),
-      'query' => array('query'),
-      'use_more' => array('use_more', 'use_more_always', 'use_more_text'),
-      'use_more_always' => array('use_more', 'use_more_always', 'use_more_text'),
-      'use_more_text' => array('use_more', 'use_more_always', 'use_more_text'),
-      'link_display' => array('link_display', 'link_url'),
+    $sections = [
+      'access' => ['access'],
+      'cache' => ['cache'],
+      'title' => ['title'],
+      'css_class' => ['css_class'],
+      'use_ajax' => ['use_ajax'],
+      'hide_attachment_summary' => ['hide_attachment_summary'],
+      'show_admin_links' => ['show_admin_links'],
+      'group_by' => ['group_by'],
+      'query' => ['query'],
+      'use_more' => ['use_more', 'use_more_always', 'use_more_text'],
+      'use_more_always' => ['use_more', 'use_more_always', 'use_more_text'],
+      'use_more_text' => ['use_more', 'use_more_always', 'use_more_text'],
+      'link_display' => ['link_display', 'link_url'],
 
       // Force these to cascade properly.
-      'style' => array('style', 'row'),
-      'row' => array('style', 'row'),
+      'style' => ['style', 'row'],
+      'row' => ['style', 'row'],
 
-      'pager' => array('pager'),
+      'pager' => ['pager'],
 
-      'exposed_form' => array('exposed_form'),
+      'exposed_form' => ['exposed_form'],
 
       // These sections are special.
-      'header' => array('header'),
-      'footer' => array('footer'),
-      'empty' => array('empty'),
-      'relationships' => array('relationships'),
-      'fields' => array('fields'),
-      'sorts' => array('sorts'),
-      'arguments' => array('arguments'),
-      'filters' => array('filters', 'filter_groups'),
-      'filter_groups' => array('filters', 'filter_groups'),
-    );
+      'header' => ['header'],
+      'footer' => ['footer'],
+      'empty' => ['empty'],
+      'relationships' => ['relationships'],
+      'fields' => ['fields'],
+      'sorts' => ['sorts'],
+      'arguments' => ['arguments'],
+      'filters' => ['filters', 'filter_groups'],
+      'filter_groups' => ['filters', 'filter_groups'],
+    ];
 
     // If the display cannot use a pager, then we cannot default it.
     if (!$this->usesPager()) {
@@ -456,9 +456,9 @@ public function defaultableSections($section = NULL) {
   }
 
   protected function defineOptions() {
-    $options = array(
-      'defaults' => array(
-        'default' => array(
+    $options = [
+      'defaults' => [
+        'default' => [
           'access' => TRUE,
           'cache' => TRUE,
           'query' => TRUE,
@@ -492,152 +492,152 @@ protected function defineOptions() {
           'arguments' => TRUE,
           'filters' => TRUE,
           'filter_groups' => TRUE,
-        ),
-      ),
+        ],
+      ],
 
-      'title' => array(
+      'title' => [
         'default' => '',
-      ),
-      'enabled' => array(
+      ],
+      'enabled' => [
         'default' => TRUE,
-      ),
-      'display_comment' => array(
+      ],
+      'display_comment' => [
         'default' => '',
-      ),
-      'css_class' => array(
+      ],
+      'css_class' => [
         'default' => '',
-      ),
-      'display_description' => array(
+      ],
+      'display_description' => [
         'default' => '',
-      ),
-      'use_ajax' => array(
+      ],
+      'use_ajax' => [
         'default' => FALSE,
-      ),
-      'hide_attachment_summary' => array(
+      ],
+      'hide_attachment_summary' => [
         'default' => FALSE,
-      ),
-      'show_admin_links' => array(
+      ],
+      'show_admin_links' => [
         'default' => TRUE,
-      ),
-      'use_more' => array(
+      ],
+      'use_more' => [
         'default' => FALSE,
-      ),
-      'use_more_always' => array(
+      ],
+      'use_more_always' => [
         'default' => TRUE,
-      ),
-      'use_more_text' => array(
+      ],
+      'use_more_text' => [
         'default' => 'more',
-      ),
-      'link_display' => array(
+      ],
+      'link_display' => [
         'default' => '',
-      ),
-      'link_url' => array(
+      ],
+      'link_url' => [
         'default' => '',
-      ),
-      'group_by' => array(
+      ],
+      'group_by' => [
         'default' => FALSE,
-      ),
-      'rendering_language' => array(
+      ],
+      'rendering_language' => [
         'default' => '***LANGUAGE_entity_translation***',
-      ),
+      ],
 
       // These types are all plugins that can have individual settings
       // and therefore need special handling.
-      'access' => array(
-        'contains' => array(
-          'type' => array('default' => 'none'),
-          'options' => array('default' => array()),
-        ),
-        'merge_defaults' => array($this, 'mergePlugin'),
-      ),
-      'cache' => array(
-        'contains' => array(
-          'type' => array('default' => 'tag'),
-          'options' => array('default' => array()),
-        ),
-        'merge_defaults' => array($this, 'mergePlugin'),
-      ),
-      'query' => array(
-        'contains' => array(
-          'type' => array('default' => 'views_query'),
-          'options' => array('default' => array()),
-         ),
-        'merge_defaults' => array($this, 'mergePlugin'),
-      ),
-      'exposed_form' => array(
-        'contains' => array(
-          'type' => array('default' => 'basic'),
-          'options' => array('default' => array()),
-         ),
-        'merge_defaults' => array($this, 'mergePlugin'),
-      ),
-      'pager' => array(
-        'contains' => array(
-          'type' => array('default' => 'mini'),
-          'options' => array('default' => array()),
-         ),
-        'merge_defaults' => array($this, 'mergePlugin'),
-      ),
-      'style' => array(
-        'contains' => array(
-          'type' => array('default' => 'default'),
-          'options' => array('default' => array()),
-        ),
-        'merge_defaults' => array($this, 'mergePlugin'),
-      ),
-      'row' => array(
-        'contains' => array(
-          'type' => array('default' => 'fields'),
-          'options' => array('default' => array()),
-        ),
-        'merge_defaults' => array($this, 'mergePlugin'),
-      ),
-
-      'exposed_block' => array(
+      'access' => [
+        'contains' => [
+          'type' => ['default' => 'none'],
+          'options' => ['default' => []],
+        ],
+        'merge_defaults' => [$this, 'mergePlugin'],
+      ],
+      'cache' => [
+        'contains' => [
+          'type' => ['default' => 'tag'],
+          'options' => ['default' => []],
+        ],
+        'merge_defaults' => [$this, 'mergePlugin'],
+      ],
+      'query' => [
+        'contains' => [
+          'type' => ['default' => 'views_query'],
+          'options' => ['default' => []],
+         ],
+        'merge_defaults' => [$this, 'mergePlugin'],
+      ],
+      'exposed_form' => [
+        'contains' => [
+          'type' => ['default' => 'basic'],
+          'options' => ['default' => []],
+         ],
+        'merge_defaults' => [$this, 'mergePlugin'],
+      ],
+      'pager' => [
+        'contains' => [
+          'type' => ['default' => 'mini'],
+          'options' => ['default' => []],
+         ],
+        'merge_defaults' => [$this, 'mergePlugin'],
+      ],
+      'style' => [
+        'contains' => [
+          'type' => ['default' => 'default'],
+          'options' => ['default' => []],
+        ],
+        'merge_defaults' => [$this, 'mergePlugin'],
+      ],
+      'row' => [
+        'contains' => [
+          'type' => ['default' => 'fields'],
+          'options' => ['default' => []],
+        ],
+        'merge_defaults' => [$this, 'mergePlugin'],
+      ],
+
+      'exposed_block' => [
         'default' => FALSE,
-      ),
-
-      'header' => array(
-        'default' => array(),
-        'merge_defaults' => array($this, 'mergeHandler'),
-      ),
-      'footer' => array(
-        'default' => array(),
-        'merge_defaults' => array($this, 'mergeHandler'),
-      ),
-      'empty' => array(
-        'default' => array(),
-        'merge_defaults' => array($this, 'mergeHandler'),
-      ),
+      ],
+
+      'header' => [
+        'default' => [],
+        'merge_defaults' => [$this, 'mergeHandler'],
+      ],
+      'footer' => [
+        'default' => [],
+        'merge_defaults' => [$this, 'mergeHandler'],
+      ],
+      'empty' => [
+        'default' => [],
+        'merge_defaults' => [$this, 'mergeHandler'],
+      ],
 
       // We want these to export last.
       // These are the 5 handler types.
-      'relationships' => array(
-        'default' => array(),
-        'merge_defaults' => array($this, 'mergeHandler'),
-      ),
-      'fields' => array(
-        'default' => array(),
-        'merge_defaults' => array($this, 'mergeHandler'),
-      ),
-      'sorts' => array(
-        'default' => array(),
-        'merge_defaults' => array($this, 'mergeHandler'),
-      ),
-      'arguments' => array(
-        'default' => array(),
-        'merge_defaults' => array($this, 'mergeHandler'),
-      ),
-      'filter_groups' => array(
-        'contains' => array(
-          'operator' => array('default' => 'AND'),
-          'groups' => array('default' => array(1 => 'AND')),
-        ),
-      ),
-      'filters' => array(
-        'default' => array(),
-      ),
-    );
+      'relationships' => [
+        'default' => [],
+        'merge_defaults' => [$this, 'mergeHandler'],
+      ],
+      'fields' => [
+        'default' => [],
+        'merge_defaults' => [$this, 'mergeHandler'],
+      ],
+      'sorts' => [
+        'default' => [],
+        'merge_defaults' => [$this, 'mergeHandler'],
+      ],
+      'arguments' => [
+        'default' => [],
+        'merge_defaults' => [$this, 'mergeHandler'],
+      ],
+      'filter_groups' => [
+        'contains' => [
+          'operator' => ['default' => 'AND'],
+          'groups' => ['default' => [1 => 'AND']],
+        ],
+      ],
+      'filters' => [
+        'default' => [],
+      ],
+    ];
 
     if (!$this->usesPager()) {
       $options['defaults']['default']['pager'] = FALSE;
@@ -682,7 +682,7 @@ public function usesExposedFormInBlock() { return $this->hasPath(); }
    */
   public function getAttachedDisplays() {
     $current_display_id = $this->display['id'];
-    $attached_displays = array();
+    $attached_displays = [];
 
     // Go through all displays and search displays which link to this one.
     foreach ($this->view->storage->get('display') as $display_id => $display) {
@@ -840,7 +840,7 @@ public function &getHandler($type, $id) {
    */
   public function &getHandlers($type) {
     if (!isset($this->handlers[$type])) {
-      $this->handlers[$type] = array();
+      $this->handlers[$type] = [];
       $types = ViewExecutable::getHandlerTypes();
       $plural = $types[$type]['plural'];
 
@@ -950,7 +950,7 @@ public function calculateDependencies() {
     // Collect all the dependencies of handlers and plugins. Only calculate
     // their dependencies if they are configured by this display.
     $plugins = array_merge($this->getAllHandlers(TRUE), $this->getAllPlugins(TRUE));
-    array_walk($plugins, array($this, 'calculatePluginDependencies'));
+    array_walk($plugins, [$this, 'calculatePluginDependencies']);
 
     return $this->dependencies;
   }
@@ -960,7 +960,7 @@ public function calculateDependencies() {
    * {@inheritdoc}
    */
   public function getFieldLabels($groupable_only = FALSE) {
-    $options = array();
+    $options = [];
     foreach ($this->getHandlers('relationship') as $relationship => $handler) {
       $relationships[$relationship] = $handler->adminLabel();
     }
@@ -1015,32 +1015,32 @@ public function optionLink($text, $section, $class = '', $title = '') {
     }
 
     if (!empty($class)) {
-      $text = SafeMarkup::format('<span>@text</span>', array('@text' => $text));
+      $text = SafeMarkup::format('<span>@text</span>', ['@text' => $text]);
     }
 
     if (empty($title)) {
       $title = $text;
     }
 
-    return \Drupal::l($text, new Url('views_ui.form_display', array(
+    return \Drupal::l($text, new Url('views_ui.form_display', [
         'js' => 'nojs',
         'view' => $this->view->storage->id(),
         'display_id' => $this->display['id'],
         'type' => $section
-      ), array(
-        'attributes' => array(
-          'class' => array('views-ajax-link', $class),
+      ], [
+        'attributes' => [
+          'class' => ['views-ajax-link', $class],
           'title' => $title,
           'id' => Html::getUniqueId('views-' . $this->display['id'] . '-' . $section)
-        )
-    )));
+        ]
+    ]));
   }
 
   /**
    * {@inheritdoc}
    */
   public function getArgumentsTokens() {
-    $tokens = array();
+    $tokens = [];
     if (!empty($this->view->build_info['substitutions'])) {
       $tokens = $this->view->build_info['substitutions'];
     }
@@ -1052,94 +1052,94 @@ public function getArgumentsTokens() {
    * {@inheritdoc}
    */
   public function optionsSummary(&$categories, &$options) {
-    $categories = array(
-      'title' => array(
+    $categories = [
+      'title' => [
         'title' => $this->t('Title'),
         'column' => 'first',
-      ),
-      'format' => array(
+      ],
+      'format' => [
         'title' => $this->t('Format'),
         'column' => 'first',
-      ),
-      'filters' => array(
+      ],
+      'filters' => [
         'title' => $this->t('Filters'),
         'column' => 'first',
-      ),
-      'fields' => array(
+      ],
+      'fields' => [
         'title' => $this->t('Fields'),
         'column' => 'first',
-      ),
-      'pager' => array(
+      ],
+      'pager' => [
         'title' => $this->t('Pager'),
         'column' => 'second',
-      ),
-      'language' => array(
+      ],
+      'language' => [
         'title' => $this->t('Language'),
         'column' => 'second',
-      ),
-      'exposed' => array(
+      ],
+      'exposed' => [
         'title' => $this->t('Exposed form'),
         'column' => 'third',
-        'build' => array(
+        'build' => [
           '#weight' => 1,
-        ),
-      ),
-      'access' => array(
+        ],
+      ],
+      'access' => [
         'title' => '',
         'column' => 'second',
-        'build' => array(
+        'build' => [
           '#weight' => -5,
-        ),
-      ),
-      'other' => array(
+        ],
+      ],
+      'other' => [
         'title' => $this->t('Other'),
         'column' => 'third',
-        'build' => array(
+        'build' => [
           '#weight' => 2,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     if ($this->display['id'] != 'default') {
-      $options['display_id'] = array(
+      $options['display_id'] = [
         'category' => 'other',
         'title' => $this->t('Machine Name'),
         'value' => !empty($this->display['new_id']) ? $this->display['new_id'] : $this->display['id'],
         'desc' => $this->t('Change the machine name of this display.'),
-      );
+      ];
     }
 
     $display_comment = views_ui_truncate($this->getOption('display_comment'), 80);
-    $options['display_comment'] = array(
+    $options['display_comment'] = [
       'category' => 'other',
       'title' => $this->t('Administrative comment'),
       'value' => !empty($display_comment) ? $display_comment : $this->t('None'),
       'desc' => $this->t('Comment or document this display.'),
-    );
+    ];
 
     $title = strip_tags($this->getOption('title'));
     if (!$title) {
       $title = $this->t('None');
     }
 
-    $options['title'] = array(
+    $options['title'] = [
       'category' => 'title',
       'title' => $this->t('Title'),
       'value' => views_ui_truncate($title, 32),
       'desc' => $this->t('Change the title that this display will use.'),
-    );
+    ];
 
     $style_plugin_instance = $this->getPlugin('style');
     $style_summary = empty($style_plugin_instance->definition['title']) ? $this->t('Missing style plugin') : $style_plugin_instance->summaryTitle();
     $style_title = empty($style_plugin_instance->definition['title']) ? $this->t('Missing style plugin') : $style_plugin_instance->pluginTitle();
 
-    $options['style'] = array(
+    $options['style'] = [
       'category' => 'format',
       'title' => $this->t('Format'),
       'value' => $style_title,
       'setting' => $style_summary,
       'desc' => $this->t('Change the way content is formatted.'),
-    );
+    ];
 
     // This adds a 'Settings' link to the style_options setting if the style has
     // options.
@@ -1152,13 +1152,13 @@ public function optionsSummary(&$categories, &$options) {
       $row_summary = empty($row_plugin_instance->definition['title']) ? $this->t('Missing row plugin') : $row_plugin_instance->summaryTitle();
       $row_title = empty($row_plugin_instance->definition['title']) ? $this->t('Missing row plugin') : $row_plugin_instance->pluginTitle();
 
-      $options['row'] = array(
+      $options['row'] = [
         'category' => 'format',
         'title' => $this->t('Show'),
         'value' => $row_title,
         'setting' => $row_summary,
         'desc' => $this->t('Change the way each row in the view is styled.'),
-      );
+      ];
       // This adds a 'Settings' link to the row_options setting if the row style
       // has options.
       if ($row_plugin_instance->usesOptions()) {
@@ -1166,28 +1166,28 @@ public function optionsSummary(&$categories, &$options) {
       }
     }
     if ($this->usesAJAX()) {
-      $options['use_ajax'] = array(
+      $options['use_ajax'] = [
         'category' => 'other',
         'title' => $this->t('Use AJAX'),
         'value' => $this->getOption('use_ajax') ? $this->t('Yes') : $this->t('No'),
         'desc' => $this->t('Change whether or not this display will use AJAX.'),
-      );
+      ];
     }
     if ($this->usesAttachments()) {
-      $options['hide_attachment_summary'] = array(
+      $options['hide_attachment_summary'] = [
         'category' => 'other',
         'title' => $this->t('Hide attachments in summary'),
         'value' => $this->getOption('hide_attachment_summary') ? $this->t('Yes') : $this->t('No'),
         'desc' => $this->t('Change whether or not to display attachments when displaying a contextual filter summary.'),
-      );
+      ];
     }
     if (!isset($this->definition['contextual links locations']) || !empty($this->definition['contextual links locations'])) {
-      $options['show_admin_links'] = array(
+      $options['show_admin_links'] = [
         'category' => 'other',
         'title' => $this->t('Contextual links'),
         'value' => $this->getOption('show_admin_links') ? $this->t('Shown') : $this->t('Hidden'),
         'desc' => $this->t('Change whether or not to display contextual links for this view.'),
-      );
+      ];
     }
 
     $pager_plugin = $this->getPlugin('pager');
@@ -1198,13 +1198,13 @@ public function optionsSummary(&$categories, &$options) {
 
     $pager_str = $pager_plugin->summaryTitle();
 
-    $options['pager'] = array(
+    $options['pager'] = [
       'category' => 'pager',
       'title' => $this->t('Use pager'),
       'value' => $pager_plugin->pluginTitle(),
       'setting' => $pager_str,
       'desc' => $this->t("Change this display's pager setting."),
-    );
+    ];
 
     // If pagers aren't allowed, change the text of the item.
     if (!$this->usesPager()) {
@@ -1216,39 +1216,39 @@ public function optionsSummary(&$categories, &$options) {
     }
 
     if ($this->usesMore()) {
-      $options['use_more'] = array(
+      $options['use_more'] = [
         'category' => 'pager',
         'title' => $this->t('More link'),
         'value' => $this->getOption('use_more') ? $this->t('Yes') : $this->t('No'),
         'desc' => $this->t('Specify whether this display will provide a "more" link.'),
-      );
+      ];
     }
 
     $this->view->initQuery();
     if ($this->view->query->getAggregationInfo()) {
-      $options['group_by'] = array(
+      $options['group_by'] = [
         'category' => 'other',
         'title' => $this->t('Use aggregation'),
         'value' => $this->getOption('group_by') ? $this->t('Yes') : $this->t('No'),
         'desc' => $this->t('Allow grouping and aggregation (calculation) of fields.'),
-      );
+      ];
     }
 
-    $options['query'] = array(
+    $options['query'] = [
       'category' => 'other',
       'title' => $this->t('Query settings'),
       'value' => $this->t('Settings'),
       'desc' => $this->t('Allow to set some advanced settings for the query plugin'),
-    );
+    ];
 
     if (\Drupal::languageManager()->isMultilingual() && $this->isBaseTableTranslatable()) {
       $rendering_language_options = $this->buildRenderingLanguageOptions();
-      $options['rendering_language'] = array(
+      $options['rendering_language'] = [
         'category' => 'language',
         'title' => $this->t('Rendering Language'),
         'value' => $rendering_language_options[$this->getOption('rendering_language')],
         'desc' => $this->t('All content that supports translations will be displayed in the selected language.'),
-      );
+      ];
     }
 
     $access_plugin = $this->getPlugin('access');
@@ -1259,13 +1259,13 @@ public function optionsSummary(&$categories, &$options) {
 
     $access_str = $access_plugin->summaryTitle();
 
-    $options['access'] = array(
+    $options['access'] = [
       'category' => 'access',
       'title' => $this->t('Access'),
       'value' => $access_plugin->pluginTitle(),
       'setting' => $access_str,
       'desc' => $this->t('Specify access control type for this display.'),
-    );
+    ];
 
     if ($access_plugin->usesOptions()) {
       $options['access']['links']['access_options'] = $this->t('Change settings for this access type.');
@@ -1279,13 +1279,13 @@ public function optionsSummary(&$categories, &$options) {
 
     $cache_str = $cache_plugin->summaryTitle();
 
-    $options['cache'] = array(
+    $options['cache'] = [
       'category' => 'other',
       'title' => $this->t('Caching'),
       'value' => $cache_plugin->pluginTitle(),
       'setting' => $cache_str,
       'desc' => $this->t('Specify caching type for this display.'),
-    );
+    ];
 
     if ($cache_plugin->usesOptions()) {
       $options['cache']['links']['cache_options'] = $this->t('Change settings for this caching type.');
@@ -1310,21 +1310,21 @@ public function optionsSummary(&$categories, &$options) {
         }
       }
 
-      $options['link_display'] = array(
+      $options['link_display'] = [
         'category' => 'pager',
         'title' => $this->t('Link display'),
         'value' => $link_display,
         'desc' => $this->t('Specify which display or custom URL this display will link to.'),
-      );
+      ];
     }
 
     if ($this->usesExposedFormInBlock()) {
-      $options['exposed_block'] = array(
+      $options['exposed_block'] = [
         'category' => 'exposed',
         'title' => $this->t('Exposed form in block'),
         'value' => $this->getOption('exposed_block') ? $this->t('Yes') : $this->t('No'),
         'desc' => $this->t('Allow the exposed form to appear in a block instead of the view.'),
-      );
+      ];
     }
 
     /** @var \Drupal\views\Plugin\views\exposed_form\ExposedFormPluginInterface $exposed_form_plugin */
@@ -1336,13 +1336,13 @@ public function optionsSummary(&$categories, &$options) {
 
     $exposed_form_str = $exposed_form_plugin->summaryTitle();
 
-    $options['exposed_form'] = array(
+    $options['exposed_form'] = [
       'category' => 'exposed',
       'title' => $this->t('Exposed form style'),
       'value' => $exposed_form_plugin->pluginTitle(),
       'setting' => $exposed_form_str,
       'desc' => $this->t('Select the kind of exposed filter to use.'),
-    );
+    ];
 
     if ($exposed_form_plugin->usesOptions()) {
       $options['exposed_form']['links']['exposed_form_options'] = $this->t('Exposed form settings for this exposed form style.');
@@ -1353,12 +1353,12 @@ public function optionsSummary(&$categories, &$options) {
       $css_class = $this->t('None');
     }
 
-    $options['css_class'] = array(
+    $options['css_class'] = [
       'category' => 'other',
       'title' => $this->t('CSS class'),
       'value' => $css_class,
       'desc' => $this->t('Change the CSS class name(s) that will be added to this display.'),
-    );
+    ];
 
     foreach ($this->extenders as $extender) {
       $extender->optionsSummary($categories, $options);
@@ -1390,144 +1390,144 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     switch ($section) {
       case 'display_id':
         $form['#title'] .= $this->t('The machine name of this display');
-        $form['display_id'] = array(
+        $form['display_id'] = [
           '#type' => 'textfield',
           '#title' => $this->t('Machine name of the display'),
           '#default_value' => !empty($this->display['new_id']) ? $this->display['new_id'] : $this->display['id'],
           '#required' => TRUE,
           '#size' => 64,
-        );
+        ];
         break;
       case 'display_title':
         $form['#title'] .= $this->t('The name and the description of this display');
-        $form['display_title'] = array(
+        $form['display_title'] = [
           '#title' => $this->t('Administrative name'),
           '#type' => 'textfield',
           '#default_value' => $this->display['display_title'],
-        );
-        $form['display_description'] = array(
+        ];
+        $form['display_description'] = [
           '#title' => $this->t('Administrative description'),
           '#type' => 'textfield',
           '#default_value' => $this->getOption('display_description'),
-        );
+        ];
         break;
       case 'display_comment':
         $form['#title'] .= $this->t('Administrative comment');
-        $form['display_comment'] = array(
+        $form['display_comment'] = [
           '#type' => 'textarea',
           '#title' => $this->t('Administrative comment'),
           '#description' => $this->t('This description will only be seen within the administrative interface and can be used to document this display.'),
           '#default_value' => $this->getOption('display_comment'),
-        );
+        ];
         break;
       case 'title':
         $form['#title'] .= $this->t('The title of this view');
-        $form['title'] = array(
+        $form['title'] = [
           '#title' => $this->t('Title'),
           '#type' => 'textfield',
           '#description' => $this->t('This title will be displayed with the view, wherever titles are normally displayed; i.e, as the page title, block title, etc.'),
           '#default_value' => $this->getOption('title'),
           '#maxlength' => 255,
-        );
+        ];
         break;
       case 'css_class':
         $form['#title'] .= $this->t('CSS class');
-        $form['css_class'] = array(
+        $form['css_class'] = [
           '#type' => 'textfield',
           '#title' => $this->t('CSS class name(s)'),
           '#description' => $this->t('Separate multiple classes by spaces.'),
           '#default_value' => $this->getOption('css_class'),
-        );
+        ];
         break;
       case 'use_ajax':
         $form['#title'] .= $this->t('AJAX');
-        $form['use_ajax'] = array(
+        $form['use_ajax'] = [
           '#description' => $this->t('Options such as paging, table sorting, and exposed filters will not initiate a page refresh.'),
           '#type' => 'checkbox',
           '#title' => $this->t('Use AJAX'),
           '#default_value' => $this->getOption('use_ajax') ? 1 : 0,
-        );
+        ];
         break;
       case 'hide_attachment_summary':
         $form['#title'] .= $this->t('Hide attachments when displaying a contextual filter summary');
-        $form['hide_attachment_summary'] = array(
+        $form['hide_attachment_summary'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Hide attachments in summary'),
           '#default_value' => $this->getOption('hide_attachment_summary') ? 1 : 0,
-        );
+        ];
         break;
       case 'show_admin_links':
         $form['#title'] .= $this->t('Show contextual links on this view.');
-        $form['show_admin_links'] = array(
+        $form['show_admin_links'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Show contextual links'),
           '#default_value' => $this->getOption('show_admin_links'),
-        );
+        ];
       break;
       case 'use_more':
         $form['#title'] .= $this->t('Add a more link to the bottom of the display.');
-        $form['use_more'] = array(
+        $form['use_more'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Create more link'),
           '#description' => $this->t("This will add a more link to the bottom of this view, which will link to the page view. If you have more than one page view, the link will point to the display specified in 'Link display' section under pager. You can override the URL at the link display setting."),
           '#default_value' => $this->getOption('use_more'),
-        );
-        $form['use_more_always'] = array(
+        ];
+        $form['use_more_always'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Always display the more link'),
           '#description' => $this->t('Check this to display the more link even if there are no more items to display.'),
           '#default_value' => $this->getOption('use_more_always'),
-          '#states' => array(
-            'visible' => array(
-              ':input[name="use_more"]' => array('checked' => TRUE),
-            ),
-          ),
-        );
-        $form['use_more_text'] = array(
+          '#states' => [
+            'visible' => [
+              ':input[name="use_more"]' => ['checked' => TRUE],
+            ],
+          ],
+        ];
+        $form['use_more_text'] = [
           '#type' => 'textfield',
           '#title' => $this->t('More link text'),
           '#description' => $this->t('The text to display for the more link.'),
           '#default_value' => $this->getOption('use_more_text'),
-          '#states' => array(
-            'visible' => array(
-              ':input[name="use_more"]' => array('checked' => TRUE),
-            ),
-          ),
-        );
+          '#states' => [
+            'visible' => [
+              ':input[name="use_more"]' => ['checked' => TRUE],
+            ],
+          ],
+        ];
         break;
       case 'group_by':
         $form['#title'] .= $this->t('Allow grouping and aggregation (calculation) of fields.');
-        $form['group_by'] = array(
+        $form['group_by'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Aggregate'),
           '#description' => $this->t('If enabled, some fields may become unavailable. All fields that are selected for grouping will be collapsed to one record per distinct value. Other fields which are selected for aggregation will have the function run on them. For example, you can group nodes on title and count the number of nids in order to get a list of duplicate titles.'),
           '#default_value' => $this->getOption('group_by'),
-        );
+        ];
         break;
       case 'access':
         $form['#title'] .= $this->t('Access restrictions');
-        $form['access'] = array(
+        $form['access'] = [
           '#prefix' => '<div class="clearfix">',
           '#suffix' => '</div>',
           '#tree' => TRUE,
-        );
+        ];
 
         $access = $this->getOption('access');
-        $form['access']['type'] = array(
+        $form['access']['type'] = [
           '#title' => $this->t('Access'),
           '#title_display' => 'invisible',
           '#type' => 'radios',
-          '#options' => Views::fetchPluginNames('access', $this->getType(), array($this->view->storage->get('base_table'))),
+          '#options' => Views::fetchPluginNames('access', $this->getType(), [$this->view->storage->get('base_table')]),
           '#default_value' => $access['type'],
-        );
+        ];
 
         $access_plugin = $this->getPlugin('access');
         if ($access_plugin->usesOptions()) {
-          $form['markup'] = array(
+          $form['markup'] = [
             '#prefix' => '<div class="js-form-item form-item description">',
-            '#markup' => $this->t('You may also adjust the @settings for the currently selected access restriction.', array('@settings' => $this->optionLink($this->t('settings'), 'access_options'))),
+            '#markup' => $this->t('You may also adjust the @settings for the currently selected access restriction.', ['@settings' => $this->optionLink($this->t('settings'), 'access_options')]),
             '#suffix' => '</div>',
-          );
+          ];
         }
 
         break;
@@ -1535,45 +1535,45 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         $plugin = $this->getPlugin('access');
         $form['#title'] .= $this->t('Access options');
         if ($plugin) {
-          $form['access_options'] = array(
+          $form['access_options'] = [
             '#tree' => TRUE,
-          );
+          ];
           $plugin->buildOptionsForm($form['access_options'], $form_state);
         }
         break;
       case 'cache':
         $form['#title'] .= $this->t('Caching');
-        $form['cache'] = array(
+        $form['cache'] = [
           '#prefix' => '<div class="clearfix">',
           '#suffix' => '</div>',
           '#tree' => TRUE,
-        );
+        ];
 
         $cache = $this->getOption('cache');
-        $form['cache']['type'] = array(
+        $form['cache']['type'] = [
           '#title' => $this->t('Caching'),
           '#title_display' => 'invisible',
           '#type' => 'radios',
-          '#options' => Views::fetchPluginNames('cache', $this->getType(), array($this->view->storage->get('base_table'))),
+          '#options' => Views::fetchPluginNames('cache', $this->getType(), [$this->view->storage->get('base_table')]),
           '#default_value' => $cache['type'],
-        );
+        ];
 
         $cache_plugin = $this->getPlugin('cache');
         if ($cache_plugin->usesOptions()) {
-          $form['markup'] = array(
+          $form['markup'] = [
             '#prefix' => '<div class="js-form-item form-item description">',
             '#suffix' => '</div>',
-            '#markup' => $this->t('You may also adjust the @settings for the currently selected cache mechanism.', array('@settings' => $this->optionLink($this->t('settings'), 'cache_options'))),
-          );
+            '#markup' => $this->t('You may also adjust the @settings for the currently selected cache mechanism.', ['@settings' => $this->optionLink($this->t('settings'), 'cache_options')]),
+          ];
         }
         break;
       case 'cache_options':
         $plugin = $this->getPlugin('cache');
         $form['#title'] .= $this->t('Caching options');
         if ($plugin) {
-          $form['cache_options'] = array(
+          $form['cache_options'] = [
             '#tree' => TRUE,
-          );
+          ];
           $plugin->buildOptionsForm($form['cache_options'], $form_state);
         }
         break;
@@ -1584,16 +1584,16 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         $form['#title'] .= $this->t('Query options');
         $this->view->initQuery();
         if ($this->view->query) {
-          $form['query'] = array(
+          $form['query'] = [
             '#tree' => TRUE,
-            'type' => array(
+            'type' => [
               '#type' => 'value',
               '#value' => $plugin_name,
-            ),
-            'options' => array(
+            ],
+            'options' => [
               '#tree' => TRUE,
-            ),
-          );
+            ],
+          ];
 
           $this->view->query->buildOptionsForm($form['query']['options'], $form_state);
         }
@@ -1602,13 +1602,13 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         $form['#title'] .= $this->t('Rendering language');
         if (\Drupal::languageManager()->isMultilingual() && $this->isBaseTableTranslatable()) {
           $options = $this->buildRenderingLanguageOptions();
-          $form['rendering_language'] = array(
+          $form['rendering_language'] = [
             '#type' => 'select',
             '#options' => $options,
             '#title' => $this->t('Rendering language'),
             '#description' => $this->t('All content that supports translations will be displayed in the selected language.'),
             '#default_value' => $this->getOption('rendering_language'),
-          );
+          ];
         }
         else {
           $form['rendering_language']['#markup'] = $this->t('The view is not based on a translatable entity type or the site is not multilingual.');
@@ -1617,26 +1617,26 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       case 'style':
         $form['#title'] .= $this->t('How should this view be styled');
         $style_plugin = $this->getPlugin('style');
-        $form['style'] = array(
+        $form['style'] = [
           '#prefix' => '<div class="clearfix">',
           '#suffix' => '</div>',
           '#tree' => TRUE,
-        );
-        $form['style']['type'] = array(
+        ];
+        $form['style']['type'] = [
           '#title' => $this->t('Style'),
           '#title_display' => 'invisible',
           '#type' => 'radios',
-          '#options' => Views::fetchPluginNames('style', $this->getType(), array($this->view->storage->get('base_table'))),
+          '#options' => Views::fetchPluginNames('style', $this->getType(), [$this->view->storage->get('base_table')]),
           '#default_value' => $style_plugin->definition['id'],
           '#description' => $this->t('If the style you choose has settings, be sure to click the settings button that will appear next to it in the View summary.'),
-        );
+        ];
 
         if ($style_plugin->usesOptions()) {
-          $form['markup'] = array(
+          $form['markup'] = [
             '#prefix' => '<div class="js-form-item form-item description">',
             '#suffix' => '</div>',
-            '#markup' => $this->t('You may also adjust the @settings for the currently selected style.', array('@settings' => $this->optionLink($this->t('settings'), 'style_options'))),
-          );
+            '#markup' => $this->t('You may also adjust the @settings for the currently selected style.', ['@settings' => $this->optionLink($this->t('settings'), 'style_options')]),
+          ];
         }
 
         break;
@@ -1666,31 +1666,31 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       case 'row':
         $form['#title'] .= $this->t('How should each row in this view be styled');
         $row_plugin_instance = $this->getPlugin('row');
-        $form['row'] = array(
+        $form['row'] = [
           '#prefix' => '<div class="clearfix">',
           '#suffix' => '</div>',
           '#tree' => TRUE,
-        );
-        $form['row']['type'] = array(
+        ];
+        $form['row']['type'] = [
           '#title' => $this->t('Row'),
           '#title_display' => 'invisible',
           '#type' => 'radios',
-          '#options' => Views::fetchPluginNames('row', $this->getType(), array($this->view->storage->get('base_table'))),
+          '#options' => Views::fetchPluginNames('row', $this->getType(), [$this->view->storage->get('base_table')]),
           '#default_value' => $row_plugin_instance->definition['id'],
-        );
+        ];
 
         if ($row_plugin_instance->usesOptions()) {
-          $form['markup'] = array(
+          $form['markup'] = [
             '#prefix' => '<div class="js-form-item form-item description">',
             '#suffix' => '</div>',
-            '#markup' => $this->t('You may also adjust the @settings for the currently selected row style.', array('@settings' => $this->optionLink($this->t('settings'), 'row_options'))),
-          );
+            '#markup' => $this->t('You may also adjust the @settings for the currently selected row style.', ['@settings' => $this->optionLink($this->t('settings'), 'row_options')]),
+          ];
         }
 
         break;
       case 'link_display':
         $form['#title'] .= $this->t('Which display to use for path');
-        $options = array(FALSE => $this->t('None'), 'custom_url' => $this->t('Custom URL'));
+        $options = [FALSE => $this->t('None'), 'custom_url' => $this->t('Custom URL')];
 
         foreach ($this->view->storage->get('display') as $display_id => $display) {
           if ($this->view->displayHandlers->get($display_id)->hasPath()) {
@@ -1698,18 +1698,18 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
           }
         }
 
-        $form['link_display'] = array(
+        $form['link_display'] = [
           '#type' => 'radios',
           '#options' => $options,
           '#description' => $this->t("Which display to use to get this display's path for things like summary links, rss feed links, more links, etc."),
           '#default_value' => $this->getOption('link_display'),
-        );
+        ];
 
-        $options = array();
+        $options = [];
         $optgroup_arguments = (string) t('Arguments');
         foreach ($this->view->display_handler->getHandlers('argument') as $arg => $handler) {
-          $options[$optgroup_arguments]["{{ arguments.$arg }}"] = $this->t('@argument title', array('@argument' => $handler->adminLabel()));
-          $options[$optgroup_arguments]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', array('@argument' => $handler->adminLabel()));
+          $options[$optgroup_arguments]["{{ arguments.$arg }}"] = $this->t('@argument title', ['@argument' => $handler->adminLabel()]);
+          $options[$optgroup_arguments]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', ['@argument' => $handler->adminLabel()]);
         }
 
         // Default text.
@@ -1726,102 +1726,102 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
           ];
           foreach (array_keys($options) as $type) {
             if (!empty($options[$type])) {
-              $items = array();
+              $items = [];
               foreach ($options[$type] as $key => $value) {
                 $items[] = $key . ' == ' . $value;
               }
-              $item_list = array(
+              $item_list = [
                 '#theme' => 'item_list',
                 '#items' => $items,
-              );
+              ];
               $description[] = $item_list;
             }
           }
         }
 
-        $form['link_url'] = array(
+        $form['link_url'] = [
           '#type' => 'textfield',
           '#title' => $this->t('Custom URL'),
           '#default_value' => $this->getOption('link_url'),
           '#description' => $description,
-          '#states' => array(
-            'visible' => array(
-              ':input[name="link_display"]' => array('value' => 'custom_url'),
-            ),
-          ),
-        );
+          '#states' => [
+            'visible' => [
+              ':input[name="link_display"]' => ['value' => 'custom_url'],
+            ],
+          ],
+        ];
         break;
       case 'exposed_block':
         $form['#title'] .= $this->t('Put the exposed form in a block');
-        $form['description'] = array(
+        $form['description'] = [
           '#markup' => '<div class="js-form-item form-item description">' . $this->t('If set, any exposed widgets will not appear with this view. Instead, a block will be made available to the Drupal block administration system, and the exposed form will appear there. Note that this block must be enabled manually, Views will not enable it for you.') . '</div>',
-        );
-        $form['exposed_block'] = array(
+        ];
+        $form['exposed_block'] = [
           '#type' => 'radios',
-          '#options' => array(1 => $this->t('Yes'), 0 => $this->t('No')),
+          '#options' => [1 => $this->t('Yes'), 0 => $this->t('No')],
           '#default_value' => $this->getOption('exposed_block') ? 1 : 0,
-        );
+        ];
         break;
       case 'exposed_form':
         $form['#title'] .= $this->t('Exposed Form');
-        $form['exposed_form'] = array(
+        $form['exposed_form'] = [
           '#prefix' => '<div class="clearfix">',
           '#suffix' => '</div>',
           '#tree' => TRUE,
-        );
+        ];
 
         $exposed_form = $this->getOption('exposed_form');
-        $form['exposed_form']['type'] = array(
+        $form['exposed_form']['type'] = [
           '#title' => $this->t('Exposed form'),
           '#title_display' => 'invisible',
           '#type' => 'radios',
-          '#options' => Views::fetchPluginNames('exposed_form', $this->getType(), array($this->view->storage->get('base_table'))),
+          '#options' => Views::fetchPluginNames('exposed_form', $this->getType(), [$this->view->storage->get('base_table')]),
           '#default_value' => $exposed_form['type'],
-        );
+        ];
 
         $exposed_form_plugin = $this->getPlugin('exposed_form');
         if ($exposed_form_plugin->usesOptions()) {
-          $form['markup'] = array(
+          $form['markup'] = [
             '#prefix' => '<div class="js-form-item form-item description">',
             '#suffix' => '</div>',
-            '#markup' => $this->t('You may also adjust the @settings for the currently selected style.', array('@settings' => $this->optionLink($this->t('settings'), 'exposed_form_options'))),
-          );
+            '#markup' => $this->t('You may also adjust the @settings for the currently selected style.', ['@settings' => $this->optionLink($this->t('settings'), 'exposed_form_options')]),
+          ];
         }
         break;
       case 'exposed_form_options':
         $plugin = $this->getPlugin('exposed_form');
         $form['#title'] .= $this->t('Exposed form options');
         if ($plugin) {
-          $form['exposed_form_options'] = array(
+          $form['exposed_form_options'] = [
             '#tree' => TRUE,
-          );
+          ];
           $plugin->buildOptionsForm($form['exposed_form_options'], $form_state);
         }
         break;
       case 'pager':
         $form['#title'] .= $this->t('Select pager');
-        $form['pager'] = array(
+        $form['pager'] = [
           '#prefix' => '<div class="clearfix">',
           '#suffix' => '</div>',
           '#tree' => TRUE,
-        );
+        ];
 
         $pager = $this->getOption('pager');
-        $form['pager']['type'] = array(
+        $form['pager']['type'] = [
           '#title' => $this->t('Pager'),
           '#title_display' => 'invisible',
           '#type' => 'radios',
-          '#options' => Views::fetchPluginNames('pager', !$this->usesPager() ? 'basic' : NULL, array($this->view->storage->get('base_table'))),
+          '#options' => Views::fetchPluginNames('pager', !$this->usesPager() ? 'basic' : NULL, [$this->view->storage->get('base_table')]),
           '#default_value' => $pager['type'],
-        );
+        ];
 
         $pager_plugin = $this->getPlugin('pager');
         if ($pager_plugin->usesOptions()) {
-          $form['markup'] = array(
+          $form['markup'] = [
             '#prefix' => '<div class="js-form-item form-item description">',
             '#suffix' => '</div>',
-            '#markup' => $this->t('You may also adjust the @settings for the currently selected pager.', array('@settings' => $this->optionLink($this->t('settings'), 'pager_options'))),
-          );
+            '#markup' => $this->t('You may also adjust the @settings for the currently selected pager.', ['@settings' => $this->optionLink($this->t('settings'), 'pager_options')]),
+          ];
         }
 
         break;
@@ -1829,9 +1829,9 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         $plugin = $this->getPlugin('pager');
         $form['#title'] .= $this->t('Pager options');
         if ($plugin) {
-          $form['pager_options'] = array(
+          $form['pager_options'] = [
             '#tree' => TRUE,
-          );
+          ];
           $plugin->buildOptionsForm($form['pager_options'], $form_state);
         }
         break;
@@ -1955,16 +1955,16 @@ public function submitOptionsForm(&$form, FormStateInterface $form_state) {
       case 'style':
         $plugin_type = $section;
         $plugin_options = $this->getOption($plugin_type);
-        $type = $form_state->getValue(array($plugin_type, 'type'));
+        $type = $form_state->getValue([$plugin_type, 'type']);
         if ($plugin_options['type'] != $type) {
           /** @var \Drupal\views\Plugin\views\ViewsPluginInterface $plugin */
           $plugin = Views::pluginManager($plugin_type)->createInstance($type);
           if ($plugin) {
             $plugin->init($this->view, $this, $plugin_options['options']);
-            $plugin_options = array(
+            $plugin_options = [
               'type' => $type,
               'options' => $plugin->options,
-            );
+            ];
             $plugin->filterByDefinedOptions($plugin_options['options']);
             $this->setOption($plugin_type, $plugin_options);
             if ($plugin->usesOptions()) {
@@ -2082,18 +2082,18 @@ public function renderMoreLink() {
       // If a URL is available (either from the display or a custom path),
       // render the "More" link.
       if ($url) {
-        $url_options = array();
+        $url_options = [];
         if (!empty($this->view->exposed_raw_input)) {
           $url_options['query'] = $this->view->exposed_raw_input;
         }
         $url->setOptions($url_options);
 
-        return array(
+        return [
           '#type' => 'more_link',
           '#url' => $url,
           '#title' => $this->useMoreText(),
           '#view' => $this->view,
-        );
+        ];
       }
     }
   }
@@ -2102,9 +2102,9 @@ public function renderMoreLink() {
    * {@inheritdoc}
    */
   public function render() {
-    $rows = (!empty($this->view->result) || $this->view->style_plugin->evenEmpty()) ? $this->view->style_plugin->render($this->view->result) : array();
+    $rows = (!empty($this->view->result) || $this->view->style_plugin->evenEmpty()) ? $this->view->style_plugin->render($this->view->result) : [];
 
-    $element = array(
+    $element = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#pre_render' => [[$this, 'elementPreRender']],
@@ -2113,7 +2113,7 @@ public function render() {
       // be available on the view.
       '#attached' => &$this->view->element['#attached'],
       '#cache' => &$this->view->element['#cache'],
-    );
+    ];
 
     $this->applyDisplayCacheabilityMetadata($this->view->element);
 
@@ -2163,15 +2163,15 @@ public function elementPreRender(array $element) {
 
     // Force a render array so CSS/JS can be attached.
     if (!is_array($element['#rows'])) {
-      $element['#rows'] = array('#markup' => $element['#rows']);
+      $element['#rows'] = ['#markup' => $element['#rows']];
     }
 
     $element['#header'] = $view->display_handler->renderArea('header', $empty);
     $element['#footer'] = $view->display_handler->renderArea('footer', $empty);
-    $element['#empty'] = $empty ? $view->display_handler->renderArea('empty', $empty) : array();
-    $element['#exposed'] = !empty($view->exposed_widgets) ? $view->exposed_widgets : array();
+    $element['#empty'] = $empty ? $view->display_handler->renderArea('empty', $empty) : [];
+    $element['#exposed'] = !empty($view->exposed_widgets) ? $view->exposed_widgets : [];
     $element['#more'] = $view->display_handler->renderMoreLink();
-    $element['#feed_icons'] = !empty($view->feedIcons) ? $view->feedIcons : array();
+    $element['#feed_icons'] = !empty($view->feedIcons) ? $view->feedIcons : [];
 
     if ($view->display_handler->renderPager()) {
       $exposed_input = isset($view->exposed_raw_input) ? $view->exposed_raw_input : NULL;
@@ -2201,12 +2201,12 @@ public function elementPreRender(array $element) {
       // The form is requesting that all non-essential views elements be hidden,
       // usually because the rendered step is not a view result.
       if ($form['show_view_elements']['#value'] == FALSE) {
-        $element['#header'] = array();
-        $element['#exposed'] = array();
-        $element['#pager'] = array();
-        $element['#footer'] = array();
-        $element['#more'] = array();
-        $element['#feed_icons'] = array();
+        $element['#header'] = [];
+        $element['#exposed'] = [];
+        $element['#pager'] = [];
+        $element['#footer'] = [];
+        $element['#more'] = [];
+        $element['#feed_icons'] = [];
       }
 
       $element['#rows'] = $form;
@@ -2219,7 +2219,7 @@ public function elementPreRender(array $element) {
    * {@inheritdoc}
    */
   public function renderArea($area, $empty = FALSE) {
-    $return = array();
+    $return = [];
     foreach ($this->getHandlers($area) as $key => $area_handler) {
       if ($area_render = $area_handler->render($empty)) {
         if (isset($area_handler->position)) {
@@ -2407,7 +2407,7 @@ public function getType() {
    * {@inheritdoc}
    */
   public function validate() {
-    $errors = array();
+    $errors = [];
     // Make sure displays that use fields HAVE fields.
     if ($this->usesFields()) {
       $fields = FALSE;
@@ -2418,7 +2418,7 @@ public function validate() {
       }
 
       if (!$fields) {
-        $errors[] = $this->t('Display "@display" uses fields but there are none defined for it or all are excluded.', array('@display' => $this->display['display_title']));
+        $errors[] = $this->t('Display "@display" uses fields but there are none defined for it or all are excluded.', ['@display' => $this->display['display_title']]);
       }
     }
 
@@ -2426,18 +2426,18 @@ public function validate() {
     if ($this->isMoreEnabled() && $this->getOption('link_display') !== 'custom_url') {
       $routed_display = $this->getRoutedDisplay();
       if (!$routed_display || !$routed_display->isEnabled()) {
-        $errors[] = $this->t('Display "@display" uses a "more" link but there are no displays it can link to. You need to specify a custom URL.', array('@display' => $this->display['display_title']));
+        $errors[] = $this->t('Display "@display" uses a "more" link but there are no displays it can link to. You need to specify a custom URL.', ['@display' => $this->display['display_title']]);
       }
     }
 
     if ($this->hasPath() && !$this->getOption('path')) {
-      $errors[] = $this->t('Display "@display" uses a path but the path is undefined.', array('@display' => $this->display['display_title']));
+      $errors[] = $this->t('Display "@display" uses a path but the path is undefined.', ['@display' => $this->display['display_title']]);
     }
 
     // Validate style plugin.
     $style = $this->getPlugin('style');
     if (empty($style)) {
-      $errors[] = $this->t('Display "@display" has an invalid style plugin.', array('@display' => $this->display['display_title']));
+      $errors[] = $this->t('Display "@display" has an invalid style plugin.', ['@display' => $this->display['display_title']]);
     }
     else {
       $result = $style->validate();
@@ -2458,7 +2458,7 @@ public function validate() {
     foreach (ViewExecutable::getHandlerTypes() as $type => $handler_type_info) {
       foreach ($this->getHandlers($type) as $handler_id => $handler) {
         if (!empty($handler->options['relationship']) && $handler->options['relationship'] != 'none' && !in_array($handler->options['relationship'], $relationships)) {
-          $errors[] = $this->t('The %handler_type %handler uses a relationship that has been removed.', array('%handler_type' => $handler_type_info['lstitle'], '%handler' => $handler->adminLabel()));
+          $errors[] = $this->t('The %handler_type %handler uses a relationship that has been removed.', ['%handler_type' => $handler_type_info['lstitle'], '%handler' => $handler->adminLabel()]);
         }
       }
     }
@@ -2514,7 +2514,7 @@ public function outputIsEmpty() {
     }
 
     // Check whether all of the area handlers are empty.
-    foreach (array('empty', 'footer', 'header') as $type) {
+    foreach (['empty', 'footer', 'header'] as $type) {
       $handlers = $this->getHandlers($type);
       foreach ($handlers as $handler) {
         // If one is not empty, return FALSE now.
@@ -2531,15 +2531,15 @@ public function outputIsEmpty() {
    * {@inheritdoc}
    */
   public function getSpecialBlocks() {
-    $blocks = array();
+    $blocks = [];
 
     if ($this->usesExposedFormInBlock()) {
       $delta = '-exp-' . $this->view->storage->id() . '-' . $this->display['id'];
-      $desc = $this->t('Exposed form: @view-@display_id', array('@view' => $this->view->storage->id(), '@display_id' => $this->display['id']));
+      $desc = $this->t('Exposed form: @view-@display_id', ['@view' => $this->view->storage->id(), '@display_id' => $this->display['id']]);
 
-      $blocks[$delta] = array(
+      $blocks[$delta] = [
         'info' => $desc,
-      );
+      ];
     }
 
     return $blocks;
@@ -2567,21 +2567,21 @@ public function viewExposedFormBlocks() {
    * {@inheritdoc}
    */
   public function getArgumentText() {
-    return array(
+    return [
       'filter value not present' => $this->t('When the filter value is <em>NOT</em> available'),
       'filter value present' => $this->t('When the filter value <em>IS</em> available or a default is provided'),
       'description' => $this->t("This display does not have a source for contextual filters, so no contextual filter value will be available unless you select 'Provide default'."),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getPagerText() {
-    return array(
+    return [
       'items per page title' => $this->t('Items to display'),
       'items per page description' => $this->t('Enter 0 for no limit.')
-    );
+    ];
   }
 
   /**
@@ -2591,7 +2591,7 @@ public function mergeDefaults() {
     $defined_options = $this->defineOptions();
 
     // Build a map of plural => singular for handler types.
-    $type_map = array();
+    $type_map = [];
     foreach (ViewExecutable::getHandlerTypes() as $type => $info) {
       $type_map[$info['plural']] = $type;
     }
@@ -2668,7 +2668,7 @@ protected function buildRenderingLanguageOptions() {
     //   https://www.drupal.org/node/2173811.
     // Pass the current rendering language (in this case a one element array) so
     // is not lost when there are language configuration changes.
-    return $this->listLanguages(LanguageInterface::STATE_CONFIGURABLE | LanguageInterface::STATE_SITE_DEFAULT | PluginBase::INCLUDE_NEGOTIATED | PluginBase::INCLUDE_ENTITY, array($this->getOption('rendering_language')));
+    return $this->listLanguages(LanguageInterface::STATE_CONFIGURABLE | LanguageInterface::STATE_SITE_DEFAULT | PluginBase::INCLUDE_NEGOTIATED | PluginBase::INCLUDE_ENTITY, [$this->getOption('rendering_language')]);
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/display/EntityReference.php b/core/modules/views/src/Plugin/views/display/EntityReference.php
index 8291378390b08a37991c3c0eec88f2094a1aaff5..4dedd51a83d253adcf418e2ba119451c42a1340f 100644
--- a/core/modules/views/src/Plugin/views/display/EntityReference.php
+++ b/core/modules/views/src/Plugin/views/display/EntityReference.php
@@ -49,9 +49,9 @@ protected function defineOptions() {
 
     // Force the style plugin to 'entity_reference_style' and the row plugin to
     // 'fields'.
-    $options['style']['contains']['type'] = array('default' => 'entity_reference');
+    $options['style']['contains']['type'] = ['default' => 'entity_reference'];
     $options['defaults']['default']['style'] = FALSE;
-    $options['row']['contains']['type'] = array('default' => 'entity_reference');
+    $options['row']['contains']['type'] = ['default' => 'entity_reference'];
     $options['defaults']['default']['row'] = FALSE;
 
     // Make sure the query is not cached.
@@ -167,14 +167,14 @@ public function validate() {
     // Verify that search fields are set up.
     $style = $this->getOption('style');
     if (!isset($style['options']['search_fields'])) {
-      $errors[] = $this->t('Display "@display" needs a selected search fields to work properly. See the settings for the Entity Reference list format.', array('@display' => $this->display['display_title']));
+      $errors[] = $this->t('Display "@display" needs a selected search fields to work properly. See the settings for the Entity Reference list format.', ['@display' => $this->display['display_title']]);
     }
     else {
       // Verify that the search fields used actually exist.
       $fields = array_keys($this->handlers['field']);
       foreach ($style['options']['search_fields'] as $field_alias => $enabled) {
         if ($enabled && !in_array($field_alias, $fields)) {
-          $errors[] = $this->t('Display "@display" uses field %field as search field, but the field is no longer present. See the settings for the Entity Reference list format.', array('@display' => $this->display['display_title'], '%field' => $field_alias));
+          $errors[] = $this->t('Display "@display" uses field %field as search field, but the field is no longer present. See the settings for the Entity Reference list format.', ['@display' => $this->display['display_title'], '%field' => $field_alias]);
         }
       }
     }
diff --git a/core/modules/views/src/Plugin/views/display/Feed.php b/core/modules/views/src/Plugin/views/display/Feed.php
index 35da24591554a9a8ce0b94b89ea3925f83f161f0..c664c053e25640fd90b8e43e48e33c9769365c9d 100644
--- a/core/modules/views/src/Plugin/views/display/Feed.php
+++ b/core/modules/views/src/Plugin/views/display/Feed.php
@@ -90,11 +90,11 @@ public function preview() {
     $output = $this->view->render();
 
     if (!empty($this->view->live_preview)) {
-      $output = array(
+      $output = [
         '#prefix' => '<pre>',
         '#plain_text' => drupal_render_root($output),
         '#suffix' => '</pre>',
-      );
+      ];
     }
 
     return $output;
@@ -117,7 +117,7 @@ public function render() {
   public function defaultableSections($section = NULL) {
     $sections = parent::defaultableSections($section);
 
-    if (in_array($section, array('style', 'row'))) {
+    if (in_array($section, ['style', 'row'])) {
       return FALSE;
     }
 
@@ -137,11 +137,11 @@ public function defaultableSections($section = NULL) {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['displays'] = array('default' => array());
+    $options['displays'] = ['default' => []];
 
     // Overrides for standard stuff.
     $options['style']['contains']['type']['default'] = 'rss';
-    $options['style']['contains']['options']['default']  = array('description' => '');
+    $options['style']['contains']['options']['default']  = ['description' => ''];
     $options['sitename_title']['default'] = FALSE;
     $options['row']['contains']['type']['default'] = 'rss_fields';
     $options['defaults']['default']['style'] = FALSE;
@@ -160,7 +160,7 @@ public function newDisplay() {
     // definition, but in this case it's dependent on the view's base table,
     // which we don't know until init().
     if (empty($this->options['row']['type']) || $this->options['row']['type'] === 'rss_fields') {
-      $row_plugins = Views::fetchPluginNames('row', $this->getType(), array($this->view->storage->get('base_table')));
+      $row_plugins = Views::fetchPluginNames('row', $this->getType(), [$this->view->storage->get('base_table')]);
       $default_row_plugin = key($row_plugins);
 
       $options = $this->getOption('row');
@@ -177,13 +177,13 @@ public function optionsSummary(&$categories, &$options) {
 
     // Since we're childing off the 'path' type, we'll still *call* our
     // category 'page' but let's override it so it says feed settings.
-    $categories['page'] = array(
+    $categories['page'] = [
       'title' => $this->t('Feed settings'),
       'column' => 'second',
-      'build' => array(
+      'build' => [
         '#weight' => -10,
-      ),
-    );
+      ],
+    ];
 
     if ($this->getOption('sitename_title')) {
       $options['title']['value'] = $this->t('Using the site name');
@@ -205,11 +205,11 @@ public function optionsSummary(&$categories, &$options) {
       $attach_to = $this->t('None');
     }
 
-    $options['displays'] = array(
+    $options['displays'] = [
       'category' => 'page',
       'title' => $this->t('Attach to'),
       'value' => $attach_to,
-    );
+    ];
   }
 
   /**
@@ -224,34 +224,34 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         $title = $form['title'];
         // A little juggling to move the 'title' field beyond our checkbox.
         unset($form['title']);
-        $form['sitename_title'] = array(
+        $form['sitename_title'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Use the site name for the title'),
           '#default_value' => $this->getOption('sitename_title'),
-        );
+        ];
         $form['title'] = $title;
-        $form['title']['#states'] = array(
-          'visible' => array(
-            ':input[name="sitename_title"]' => array('checked' => FALSE),
-          ),
-        );
+        $form['title']['#states'] = [
+          'visible' => [
+            ':input[name="sitename_title"]' => ['checked' => FALSE],
+          ],
+        ];
         break;
       case 'displays':
         $form['#title'] .= $this->t('Attach to');
-        $displays = array();
+        $displays = [];
         foreach ($this->view->storage->get('display') as $display_id => $display) {
           // @todo The display plugin should have display_title and id as well.
           if ($this->view->displayHandlers->has($display_id) && $this->view->displayHandlers->get($display_id)->acceptAttachments()) {
             $displays[$display_id] = $display['display_title'];
           }
         }
-        $form['displays'] = array(
+        $form['displays'] = [
           '#title' => $this->t('Displays'),
           '#type' => 'checkboxes',
           '#description' => $this->t('The feed icon will be available only to the selected displays.'),
           '#options' => array_map('\Drupal\Component\Utility\Html::escape', $displays),
           '#default_value' => $this->getOption('displays'),
-        );
+        ];
         break;
       case 'path':
         $form['path']['#description'] = $this->t('This view will be displayed by visiting this path on your site. It is recommended that the path be something like "path/%/%/feed" or "path/%/%/rss.xml", putting one % in the path for each contextual filter you have defined in the view.');
diff --git a/core/modules/views/src/Plugin/views/display/Page.php b/core/modules/views/src/Plugin/views/display/Page.php
index d79b75b83376610d283d575ef2f3ef5061d648fa..aca0683f3c599a1143ed72a3c6e771356d2af48e 100644
--- a/core/modules/views/src/Plugin/views/display/Page.php
+++ b/core/modules/views/src/Plugin/views/display/Page.php
@@ -118,27 +118,27 @@ public static function &getPageRenderArray() {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['menu'] = array(
-      'contains' => array(
-        'type' => array('default' => 'none'),
-        'title' => array('default' => ''),
-        'description' => array('default' => ''),
-        'weight' => array('default' => 0),
-        'enabled' => array('default' => TRUE),
-        'menu_name' => array('default' => 'main'),
-        'parent' => array('default' => ''),
-        'context' => array('default' => ''),
-        'expanded' => array('default' => FALSE),
-      ),
-    );
-    $options['tab_options'] = array(
-      'contains' => array(
-        'type' => array('default' => 'none'),
-        'title' => array('default' => ''),
-        'description' => array('default' => ''),
-        'weight' => array('default' => 0),
-      ),
-    );
+    $options['menu'] = [
+      'contains' => [
+        'type' => ['default' => 'none'],
+        'title' => ['default' => ''],
+        'description' => ['default' => ''],
+        'weight' => ['default' => 0],
+        'enabled' => ['default' => TRUE],
+        'menu_name' => ['default' => 'main'],
+        'parent' => ['default' => ''],
+        'context' => ['default' => ''],
+        'expanded' => ['default' => FALSE],
+      ],
+    ];
+    $options['tab_options'] = [
+      'contains' => [
+        'type' => ['default' => 'none'],
+        'title' => ['default' => ''],
+        'description' => ['default' => ''],
+        'weight' => ['default' => 0],
+      ],
+    ];
 
     return $options;
   }
@@ -175,9 +175,9 @@ public function execute() {
     // @todo Figure out how to support custom response objects. Maybe for pages
     //   it should be dropped.
     if (is_array($render)) {
-      $render += array(
+      $render += [
         '#title' => ['#markup' => $this->view->getTitle(), '#allowed_tags' => Xss::getHtmlTagList()],
-      );
+      ];
     }
     return $render;
   }
@@ -190,7 +190,7 @@ public function optionsSummary(&$categories, &$options) {
 
     $menu = $this->getOption('menu');
     if (!is_array($menu)) {
-      $menu = array('type' => 'none');
+      $menu = ['type' => 'none'];
     }
     switch ($menu['type']) {
       case 'none':
@@ -198,19 +198,19 @@ public function optionsSummary(&$categories, &$options) {
         $menu_str = $this->t('No menu');
         break;
       case 'normal':
-        $menu_str = $this->t('Normal: @title', array('@title' => $menu['title']));
+        $menu_str = $this->t('Normal: @title', ['@title' => $menu['title']]);
         break;
       case 'tab':
       case 'default tab':
-        $menu_str = $this->t('Tab: @title', array('@title' => $menu['title']));
+        $menu_str = $this->t('Tab: @title', ['@title' => $menu['title']]);
         break;
     }
 
-    $options['menu'] = array(
+    $options['menu'] = [
       'category' => 'page',
       'title' => $this->t('Menu'),
       'value' => views_ui_truncate($menu_str, 24),
-    );
+    ];
 
     // This adds a 'Settings' link to the style_options setting if the style
     // has options.
@@ -229,67 +229,67 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     switch ($form_state->get('section')) {
       case 'menu':
         $form['#title'] .= $this->t('Menu item entry');
-        $form['menu'] = array(
+        $form['menu'] = [
           '#prefix' => '<div class="clearfix">',
           '#suffix' => '</div>',
           '#tree' => TRUE,
-        );
+        ];
         $menu = $this->getOption('menu');
         if (empty($menu)) {
-          $menu = array('type' => 'none', 'title' => '', 'weight' => 0, 'expanded' => FALSE);
+          $menu = ['type' => 'none', 'title' => '', 'weight' => 0, 'expanded' => FALSE];
         }
-        $form['menu']['type'] = array(
+        $form['menu']['type'] = [
           '#prefix' => '<div class="views-left-30">',
           '#suffix' => '</div>',
           '#title' => $this->t('Type'),
           '#type' => 'radios',
-          '#options' => array(
+          '#options' => [
             'none' => $this->t('No menu entry'),
             'normal' => $this->t('Normal menu entry'),
             'tab' => $this->t('Menu tab'),
             'default tab' => $this->t('Default menu tab')
-          ),
+          ],
           '#default_value' => $menu['type'],
-        );
+        ];
 
-        $form['menu']['title'] = array(
+        $form['menu']['title'] = [
           '#prefix' => '<div class="views-left-50">',
           '#title' => $this->t('Menu link title'),
           '#type' => 'textfield',
           '#default_value' => $menu['title'],
-          '#states' => array(
-            'visible' => array(
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'normal'),
-              ),
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'tab'),
-              ),
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'default tab'),
-              ),
-            ),
-          ),
-        );
-        $form['menu']['description'] = array(
+          '#states' => [
+            'visible' => [
+              [
+                ':input[name="menu[type]"]' => ['value' => 'normal'],
+              ],
+              [
+                ':input[name="menu[type]"]' => ['value' => 'tab'],
+              ],
+              [
+                ':input[name="menu[type]"]' => ['value' => 'default tab'],
+              ],
+            ],
+          ],
+        ];
+        $form['menu']['description'] = [
           '#title' => $this->t('Description'),
           '#type' => 'textfield',
           '#default_value' => $menu['description'],
           '#description' => $this->t("Shown when hovering over the menu link."),
-          '#states' => array(
-            'visible' => array(
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'normal'),
-              ),
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'tab'),
-              ),
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'default tab'),
-              ),
-            ),
-          ),
-        );
+          '#states' => [
+            'visible' => [
+              [
+                ':input[name="menu[type]"]' => ['value' => 'normal'],
+              ],
+              [
+                ':input[name="menu[type]"]' => ['value' => 'tab'],
+              ],
+              [
+                ':input[name="menu[type]"]' => ['value' => 'default tab'],
+              ],
+            ],
+          ],
+        ];
         $form['menu']['expanded'] = [
           '#title' => $this->t('Show as expanded'),
           '#type' => 'checkbox',
@@ -302,133 +302,133 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         if (\Drupal::moduleHandler()->moduleExists('menu_ui')) {
           $menu_link = 'views_view:views.' . $form_state->get('view')->id() . '.' . $form_state->get('display_id');
           $form['menu']['parent'] = \Drupal::service('menu.parent_form_selector')->parentSelectElement($menu_parent, $menu_link);
-          $form['menu']['parent'] += array(
+          $form['menu']['parent'] += [
             '#title' => $this->t('Parent'),
             '#description' => $this->t('The maximum depth for a link and all its children is fixed. Some menu links may not be available as parents if selecting them would exceed this limit.'),
-            '#attributes' => array('class' => array('menu-title-select')),
-            '#states' => array(
-              'visible' => array(
-                array(
-                  ':input[name="menu[type]"]' => array('value' => 'normal'),
-                ),
-                array(
-                  ':input[name="menu[type]"]' => array('value' => 'tab'),
-                ),
-              ),
-            ),
-          );
+            '#attributes' => ['class' => ['menu-title-select']],
+            '#states' => [
+              'visible' => [
+                [
+                  ':input[name="menu[type]"]' => ['value' => 'normal'],
+                ],
+                [
+                  ':input[name="menu[type]"]' => ['value' => 'tab'],
+                ],
+              ],
+            ],
+          ];
         }
         else {
-          $form['menu']['parent'] = array(
+          $form['menu']['parent'] = [
             '#type' => 'value',
             '#value' => $menu_parent,
-          );
-          $form['menu']['markup'] = array(
+          ];
+          $form['menu']['markup'] = [
             '#markup' => $this->t('Menu selection requires the activation of Menu UI module.'),
-          );
+          ];
         }
-        $form['menu']['weight'] = array(
+        $form['menu']['weight'] = [
           '#title' => $this->t('Weight'),
           '#type' => 'textfield',
           '#default_value' => isset($menu['weight']) ? $menu['weight'] : 0,
           '#description' => $this->t('In the menu, the heavier links will sink and the lighter links will be positioned nearer the top.'),
-          '#states' => array(
-            'visible' => array(
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'normal'),
-              ),
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'tab'),
-              ),
-              array(
-                ':input[name="menu[type]"]' => array('value' => 'default tab'),
-              ),
-            ),
-          ),
-        );
-        $form['menu']['context'] = array(
+          '#states' => [
+            'visible' => [
+              [
+                ':input[name="menu[type]"]' => ['value' => 'normal'],
+              ],
+              [
+                ':input[name="menu[type]"]' => ['value' => 'tab'],
+              ],
+              [
+                ':input[name="menu[type]"]' => ['value' => 'default tab'],
+              ],
+            ],
+          ],
+        ];
+        $form['menu']['context'] = [
           '#title' => $this->t('Context'),
           '#suffix' => '</div>',
           '#type' => 'checkbox',
           '#default_value' => !empty($menu['context']),
           '#description' => $this->t('Displays the link in contextual links'),
-          '#states' => array(
-            'visible' => array(
-              ':input[name="menu[type]"]' => array('value' => 'tab'),
-            ),
-          ),
-        );
+          '#states' => [
+            'visible' => [
+              ':input[name="menu[type]"]' => ['value' => 'tab'],
+            ],
+          ],
+        ];
         break;
       case 'tab_options':
         $form['#title'] .= $this->t('Default tab options');
         $tab_options = $this->getOption('tab_options');
         if (empty($tab_options)) {
-          $tab_options = array('type' => 'none', 'title' => '', 'weight' => 0);
+          $tab_options = ['type' => 'none', 'title' => '', 'weight' => 0];
         }
 
-        $form['tab_markup'] = array(
+        $form['tab_markup'] = [
           '#markup' => '<div class="js-form-item form-item description">' . $this->t('When providing a menu item as a tab, Drupal needs to know what the parent menu item of that tab will be. Sometimes the parent will already exist, but other times you will need to have one created. The path of a parent item will always be the same path with the last part left off. i.e, if the path to this view is <em>foo/bar/baz</em>, the parent path would be <em>foo/bar</em>.') . '</div>',
-        );
+        ];
 
-        $form['tab_options'] = array(
+        $form['tab_options'] = [
           '#prefix' => '<div class="clearfix">',
           '#suffix' => '</div>',
           '#tree' => TRUE,
-        );
-        $form['tab_options']['type'] = array(
+        ];
+        $form['tab_options']['type'] = [
           '#prefix' => '<div class="views-left-25">',
           '#suffix' => '</div>',
           '#title' => $this->t('Parent menu item'),
           '#type' => 'radios',
-          '#options' => array('none' => $this->t('Already exists'), 'normal' => $this->t('Normal menu item'), 'tab' => $this->t('Menu tab')),
+          '#options' => ['none' => $this->t('Already exists'), 'normal' => $this->t('Normal menu item'), 'tab' => $this->t('Menu tab')],
           '#default_value' => $tab_options['type'],
-        );
-        $form['tab_options']['title'] = array(
+        ];
+        $form['tab_options']['title'] = [
           '#prefix' => '<div class="views-left-75">',
           '#title' => $this->t('Title'),
           '#type' => 'textfield',
           '#default_value' => $tab_options['title'],
           '#description' => $this->t('If creating a parent menu item, enter the title of the item.'),
-          '#states' => array(
-            'visible' => array(
-              array(
-                ':input[name="tab_options[type]"]' => array('value' => 'normal'),
-              ),
-              array(
-                ':input[name="tab_options[type]"]' => array('value' => 'tab'),
-              ),
-            ),
-          ),
-        );
-        $form['tab_options']['description'] = array(
+          '#states' => [
+            'visible' => [
+              [
+                ':input[name="tab_options[type]"]' => ['value' => 'normal'],
+              ],
+              [
+                ':input[name="tab_options[type]"]' => ['value' => 'tab'],
+              ],
+            ],
+          ],
+        ];
+        $form['tab_options']['description'] = [
           '#title' => $this->t('Description'),
           '#type' => 'textfield',
           '#default_value' => $tab_options['description'],
           '#description' => $this->t('If creating a parent menu item, enter the description of the item.'),
-          '#states' => array(
-            'visible' => array(
-              array(
-                ':input[name="tab_options[type]"]' => array('value' => 'normal'),
-              ),
-              array(
-                ':input[name="tab_options[type]"]' => array('value' => 'tab'),
-              ),
-            ),
-          ),
-        );
-        $form['tab_options']['weight'] = array(
+          '#states' => [
+            'visible' => [
+              [
+                ':input[name="tab_options[type]"]' => ['value' => 'normal'],
+              ],
+              [
+                ':input[name="tab_options[type]"]' => ['value' => 'tab'],
+              ],
+            ],
+          ],
+        ];
+        $form['tab_options']['weight'] = [
           '#suffix' => '</div>',
           '#title' => $this->t('Tab weight'),
           '#type' => 'textfield',
           '#default_value' => $tab_options['weight'],
           '#size' => 5,
           '#description' => $this->t('If the parent menu item is a tab, enter the weight of the tab. Heavier tabs will sink and the lighter tabs will be positioned nearer to the first menu item.'),
-          '#states' => array(
-            'visible' => array(
-              ':input[name="tab_options[type]"]' => array('value' => 'tab'),
-            ),
-          ),
-        );
+          '#states' => [
+            'visible' => [
+              ':input[name="tab_options[type]"]' => ['value' => 'tab'],
+            ],
+          ],
+        ];
         break;
     }
   }
@@ -441,7 +441,7 @@ public function validateOptionsForm(&$form, FormStateInterface $form_state) {
 
     if ($form_state->get('section') == 'menu') {
       $path = $this->getOption('path');
-      $menu_type = $form_state->getValue(array('menu', 'type'));
+      $menu_type = $form_state->getValue(['menu', 'type']);
       if ($menu_type == 'normal' && strpos($path, '%') !== FALSE) {
         $form_state->setError($form['menu']['type'], $this->t('Views cannot create normal menu items for paths with a % in them.'));
       }
@@ -454,7 +454,7 @@ public function validateOptionsForm(&$form, FormStateInterface $form_state) {
         }
       }
 
-      if ($menu_type != 'none' && $form_state->isValueEmpty(array('menu', 'title'))) {
+      if ($menu_type != 'none' && $form_state->isValueEmpty(['menu', 'title'])) {
         $form_state->setError($form['menu']['title'], $this->t('Title is required for this menu type.'));
       }
     }
@@ -472,7 +472,7 @@ public function submitOptionsForm(&$form, FormStateInterface $form_state) {
         list($menu['menu_name'], $menu['parent']) = explode(':', $menu['parent'], 2);
         $this->setOption('menu', $menu);
         // send ajax form to options page if we use it.
-        if ($form_state->getValue(array('menu', 'type')) == 'default tab') {
+        if ($form_state->getValue(['menu', 'type']) == 'default tab') {
           $form_state->get('view')->addFormToStack('display', $this->display['id'], 'tab_options');
         }
         break;
@@ -490,13 +490,13 @@ public function validate() {
 
     $menu = $this->getOption('menu');
     if (!empty($menu['type']) && $menu['type'] != 'none' && empty($menu['title'])) {
-      $errors[] = $this->t('Display @display is set to use a menu but the menu link text is not set.', array('@display' => $this->display['display_title']));
+      $errors[] = $this->t('Display @display is set to use a menu but the menu link text is not set.', ['@display' => $this->display['display_title']]);
     }
 
     if ($menu['type'] == 'default tab') {
       $tab_options = $this->getOption('tab_options');
       if (!empty($tab_options['type']) && $tab_options['type'] != 'none' && empty($tab_options['title'])) {
-        $errors[] = $this->t('Display @display is set to use a parent menu but the parent menu link text is not set.', array('@display' => $this->display['display_title']));
+        $errors[] = $this->t('Display @display is set to use a parent menu but the parent menu link text is not set.', ['@display' => $this->display['display_title']]);
       }
     }
 
@@ -507,21 +507,21 @@ public function validate() {
    * {@inheritdoc}
    */
   public function getArgumentText() {
-    return array(
+    return [
       'filter value not present' => $this->t('When the filter value is <em>NOT</em> in the URL'),
       'filter value present' => $this->t('When the filter value <em>IS</em> in the URL or a default is provided'),
       'description' => $this->t('The contextual filter values are provided by the URL.'),
-    );
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function getPagerText() {
-    return array(
+    return [
       'items per page title' => $this->t('Items per page'),
       'items per page description' => $this->t('Enter 0 for no limit.')
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/display/PathPluginBase.php b/core/modules/views/src/Plugin/views/display/PathPluginBase.php
index 3654d63aa1b49a375a014c830735ae939310dc00..17d8663ed1663892b8c672528a1830ffddec3e7e 100644
--- a/core/modules/views/src/Plugin/views/display/PathPluginBase.php
+++ b/core/modules/views/src/Plugin/views/display/PathPluginBase.php
@@ -109,8 +109,8 @@ protected function isDefaultTabPath() {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['path'] = array('default' => '');
-    $options['route_name'] = array('default' => '');
+    $options['path'] = ['default' => ''];
+    $options['route_name'] = ['default' => ''];
 
     return $options;
   }
@@ -127,13 +127,13 @@ protected function defineOptions() {
    *   The route for the view.
    */
   protected function getRoute($view_id, $display_id) {
-    $defaults = array(
+    $defaults = [
       '_controller' => 'Drupal\views\Routing\ViewPageController::handle',
       '_title' => $this->view->getTitle(),
       'view_id' => $view_id,
       'display_id' => $display_id,
       '_view_display_show_admin_links' => $this->getOption('show_admin_links'),
-    );
+    ];
 
     // @todo How do we apply argument validation?
     $bits = explode('/', $this->getOption('path'));
@@ -145,7 +145,7 @@ protected function getRoute($view_id, $display_id) {
     $argument_ids = array_keys((array) $this->getOption('arguments'));
     $total_arguments = count($argument_ids);
 
-    $argument_map = array();
+    $argument_map = [];
 
     // Replace arguments in the views UI (defined via %) with parameters in
     // routes (defined via {}). As a name for the parameter use arg_$key, so
@@ -223,7 +223,7 @@ public function collectRoutes(RouteCollection $collection) {
       $route_name = "view.$view_id.$display_id";
     }
     $collection->add($route_name, $route);
-    return array("$view_id.$display_id" => $route_name);
+    return ["$view_id.$display_id" => $route_name];
   }
 
   /**
@@ -274,7 +274,7 @@ protected function overrideAppliesPathAndMethod($view_path, Route $view_route, R
    * {@inheritdoc}
    */
   public function alterRoutes(RouteCollection $collection) {
-    $view_route_names = array();
+    $view_route_names = [];
     $view_path = $this->getPath();
     $view_id = $this->view->storage->id();
     $display_id = $this->display['id'];
@@ -293,7 +293,7 @@ public function alterRoutes(RouteCollection $collection) {
 
         $path = $view_route->getPath();
         // Replace the path with the original parameter names and add a mapping.
-        $argument_map = array();
+        $argument_map = [];
         // We assume that the numeric ids of the parameters match the one from
         // the view argument handlers.
         foreach ($parameters as $position => $parameter_name) {
@@ -324,7 +324,7 @@ public function alterRoutes(RouteCollection $collection) {
    * {@inheritdoc}
    */
   public function getMenuLinks() {
-    $links = array();
+    $links = [];
 
     // Replace % with the link to our standard views argument loader
     // views_arg_load -- which lives in views.module.
@@ -336,7 +336,7 @@ public function getMenuLinks() {
     foreach ($bits as $pos => $bit) {
       if ($bit == '%') {
         // If a view requires any arguments we cannot create a static menu link.
-        return array();
+        return [];
       }
     }
 
@@ -349,15 +349,15 @@ public function getMenuLinks() {
     if ($path) {
       $menu = $this->getOption('menu');
       if (!empty($menu['type']) && $menu['type'] == 'normal') {
-        $links[$menu_link_id] = array();
+        $links[$menu_link_id] = [];
         // Some views might override existing paths, so we have to set the route
         // name based upon the altering.
-        $links[$menu_link_id] = array(
+        $links[$menu_link_id] = [
           'route_name' => $this->getRouteName(),
           // Identify URL embedded arguments and correlate them to a handler.
-          'load arguments'  => array($this->view->storage->id(), $this->display['id'], '%index'),
+          'load arguments'  => [$this->view->storage->id(), $this->display['id'], '%index'],
           'id' => $menu_link_id,
-        );
+        ];
         $links[$menu_link_id]['title'] = $menu['title'];
         $links[$menu_link_id]['description'] = $menu['description'];
         $links[$menu_link_id]['parent'] = $menu['parent'];
@@ -371,10 +371,10 @@ public function getMenuLinks() {
         // Insert item into the proper menu.
         $links[$menu_link_id]['menu_name'] = $menu['menu_name'];
         // Keep track of where we came from.
-        $links[$menu_link_id]['metadata'] = array(
+        $links[$menu_link_id]['metadata'] = [
           'view_id' => $view_id,
           'display_id' => $display_id,
-        );
+        ];
       }
     }
 
@@ -404,13 +404,13 @@ public function execute() {
   public function optionsSummary(&$categories, &$options) {
     parent::optionsSummary($categories, $options);
 
-    $categories['page'] = array(
+    $categories['page'] = [
       'title' => $this->t('Page settings'),
       'column' => 'second',
-      'build' => array(
+      'build' => [
         '#weight' => -10,
-      ),
-    );
+      ],
+    ];
 
     $path = strip_tags($this->getOption('path'));
 
@@ -421,11 +421,11 @@ public function optionsSummary(&$categories, &$options) {
       $path = '/' . $path;
     }
 
-    $options['path'] = array(
+    $options['path'] = [
       'category' => 'page',
       'title' => $this->t('Path'),
       'value' => views_ui_truncate($path, 24),
-    );
+    ];
   }
 
   /**
@@ -437,17 +437,17 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     switch ($form_state->get('section')) {
       case 'path':
         $form['#title'] .= $this->t('The menu path or URL of this view');
-        $form['path'] = array(
+        $form['path'] = [
           '#type' => 'textfield',
           '#title' => $this->t('Path'),
           '#description' => $this->t('This view will be displayed by visiting this path on your site. You may use "%" in your URL to represent values that will be used for contextual filters: For example, "node/%/feed". If needed you can even specify named route parameters like taxonomy/term/%taxonomy_term'),
           '#default_value' => $this->getOption('path'),
           '#field_prefix' => '<span dir="ltr">' . $this->url('<none>', [], ['absolute' => TRUE]),
           '#field_suffix' => '</span>&lrm;',
-          '#attributes' => array('dir' => LanguageInterface::DIRECTION_LTR),
+          '#attributes' => ['dir' => LanguageInterface::DIRECTION_LTR],
           // Account for the leading backslash.
           '#maxlength' => 254,
-        );
+        ];
         break;
     }
   }
@@ -490,7 +490,7 @@ public function submitOptionsForm(&$form, FormStateInterface $form_state) {
    *   A list of error strings.
    */
   protected function validatePath($path) {
-    $errors = array();
+    $errors = [];
     if (strpos($path, '%') === 0) {
       $errors[] = $this->t('"%" may not be used for the first segment of a path.');
     }
@@ -557,7 +557,7 @@ public function getRouteName() {
    * {@inheritdoc}
    */
   public function getAlteredRouteNames() {
-    return $this->state->get('views.view_route_names') ?: array();
+    return $this->state->get('views.view_route_names') ?: [];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php b/core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php
index 4a2bc81d036c5ba6d47325832d6362c1433f9ef2..fffe084c7252afb353b8c3d71c1474f2bf7fb70d 100644
--- a/core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php
+++ b/core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php
@@ -26,13 +26,13 @@ abstract class ExposedFormPluginBase extends PluginBase implements CacheableDepe
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['submit_button'] = array('default' => $this->t('Apply'));
-    $options['reset_button'] = array('default' => FALSE);
-    $options['reset_button_label'] = array('default' => $this->t('Reset'));
-    $options['exposed_sorts_label'] = array('default' => $this->t('Sort by'));
-    $options['expose_sort_order'] = array('default' => TRUE);
-    $options['sort_asc_label'] = array('default' => $this->t('Asc'));
-    $options['sort_desc_label'] = array('default' => $this->t('Desc'));
+    $options['submit_button'] = ['default' => $this->t('Apply')];
+    $options['reset_button'] = ['default' => FALSE];
+    $options['reset_button_label'] = ['default' => $this->t('Reset')];
+    $options['exposed_sorts_label'] = ['default' => $this->t('Sort by')];
+    $options['expose_sort_order'] = ['default' => TRUE];
+    $options['sort_asc_label'] = ['default' => $this->t('Asc')];
+    $options['sort_desc_label'] = ['default' => $this->t('Desc')];
     return $options;
   }
 
@@ -41,69 +41,69 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['submit_button'] = array(
+    $form['submit_button'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Submit button text'),
       '#default_value' => $this->options['submit_button'],
       '#required' => TRUE,
-    );
+    ];
 
-    $form['reset_button'] = array(
+    $form['reset_button'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Include reset button (resets all applied exposed filters)'),
       '#default_value' => $this->options['reset_button'],
-    );
+    ];
 
-    $form['reset_button_label'] = array(
+    $form['reset_button_label'] = [
      '#type' => 'textfield',
       '#title' => $this->t('Reset button label'),
       '#description' => $this->t('Text to display in the reset button of the exposed form.'),
       '#default_value' => $this->options['reset_button_label'],
       '#required' => TRUE,
-      '#states' => array(
-        'invisible' => array(
-          'input[name="exposed_form_options[reset_button]"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
-
-    $form['exposed_sorts_label'] = array(
+      '#states' => [
+        'invisible' => [
+          'input[name="exposed_form_options[reset_button]"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
+
+    $form['exposed_sorts_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Exposed sorts label'),
       '#default_value' => $this->options['exposed_sorts_label'],
       '#required' => TRUE,
-    );
+    ];
 
-    $form['expose_sort_order'] = array(
+    $form['expose_sort_order'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow people to choose the sort order'),
       '#description' => $this->t('If sort order is not exposed, the sort criteria settings for each sort will determine its order.'),
       '#default_value' => $this->options['expose_sort_order'],
-    );
+    ];
 
-    $form['sort_asc_label'] = array(
+    $form['sort_asc_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label for ascending sort'),
       '#default_value' => $this->options['sort_asc_label'],
       '#required' => TRUE,
-      '#states' => array(
-        'visible' => array(
-          'input[name="exposed_form_options[expose_sort_order]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-
-    $form['sort_desc_label'] = array(
+      '#states' => [
+        'visible' => [
+          'input[name="exposed_form_options[expose_sort_order]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+
+    $form['sort_desc_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label for descending sort'),
       '#default_value' => $this->options['sort_desc_label'],
       '#required' => TRUE,
-      '#states' => array(
-        'visible' => array(
-          'input[name="exposed_form_options[expose_sort_order]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          'input[name="exposed_form_options[expose_sort_order]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
   }
 
   /**
@@ -141,7 +141,7 @@ public function renderExposedForm($block = FALSE) {
     }
 
     if (!$this->view->display_handler->displaysExposed() || (!$block && $this->view->display_handler->getOption('exposed_block'))) {
-      return array();
+      return [];
     }
     else {
       return $form;
@@ -153,19 +153,19 @@ public function renderExposedForm($block = FALSE) {
    */
   public function query() {
     $view = $this->view;
-    $exposed_data = isset($view->exposed_data) ? $view->exposed_data : array();
+    $exposed_data = isset($view->exposed_data) ? $view->exposed_data : [];
     $sort_by = isset($exposed_data['sort_by']) ? $exposed_data['sort_by'] : NULL;
     if (!empty($sort_by)) {
       // Make sure the original order of sorts is preserved
       // (e.g. a sticky sort is often first)
       if (isset($view->sort[$sort_by])) {
-        $view->query->orderby = array();
+        $view->query->orderby = [];
         foreach ($view->sort as $key => $sort) {
           if (!$sort->isExposed()) {
             $sort->query();
           }
           elseif ($key == $sort_by) {
-            if (isset($exposed_data['sort_order']) && in_array($exposed_data['sort_order'], array('ASC', 'DESC'))) {
+            if (isset($exposed_data['sort_order']) && in_array($exposed_data['sort_order'], ['ASC', 'DESC'])) {
               $sort->options['order'] = $exposed_data['sort_order'];
             }
             $sort->setRelationship();
@@ -205,7 +205,7 @@ public function exposedFormAlter(&$form, FormStateInterface $form_state) {
     }
 
     // Check if there is exposed sorts for this view
-    $exposed_sorts = array();
+    $exposed_sorts = [];
     foreach ($this->view->sort as $id => $handler) {
       if ($handler->canExpose() && $handler->isExposed()) {
         $exposed_sorts[$id] = Html::escape($handler->options['expose']['label']);
@@ -213,15 +213,15 @@ public function exposedFormAlter(&$form, FormStateInterface $form_state) {
     }
 
     if (count($exposed_sorts)) {
-      $form['sort_by'] = array(
+      $form['sort_by'] = [
         '#type' => 'select',
         '#options' => $exposed_sorts,
         '#title' => $this->options['exposed_sorts_label'],
-      );
-      $sort_order = array(
+      ];
+      $sort_order = [
         'ASC' => $this->options['sort_asc_label'],
         'DESC' => $this->options['sort_desc_label'],
-      );
+      ];
       $user_input = $form_state->getUserInput();
       if (isset($user_input['sort_by']) && isset($this->view->sort[$user_input['sort_by']])) {
         $default_sort_order = $this->view->sort[$user_input['sort_by']]->options['order'];
@@ -238,22 +238,22 @@ public function exposedFormAlter(&$form, FormStateInterface $form_state) {
       }
 
       if ($this->options['expose_sort_order']) {
-        $form['sort_order'] = array(
+        $form['sort_order'] = [
           '#type' => 'select',
           '#options' => $sort_order,
-          '#title' => $this->t('Order', array(), array('context' => 'Sort order')),
+          '#title' => $this->t('Order', [], ['context' => 'Sort order']),
           '#default_value' => $default_sort_order,
-        );
+        ];
       }
       $form['submit']['#weight'] = 10;
     }
 
     if (!empty($this->options['reset_button'])) {
-      $form['actions']['reset'] = array(
+      $form['actions']['reset'] = [
         '#value' => $this->options['reset_button_label'],
         '#type' => 'submit',
         '#weight' => 10,
-      );
+      ];
 
       // Get an array of exposed filters, keyed by identifier option.
       $exposed_filters = [];
@@ -329,7 +329,7 @@ public function resetForm(&$form, FormStateInterface $form_state) {
     }
     else {
       $form_state->setRebuild();
-      $this->view->exposed_data = array();
+      $this->view->exposed_data = [];
     }
 
     $form_state->setRedirect('<current>');
diff --git a/core/modules/views/src/Plugin/views/exposed_form/InputRequired.php b/core/modules/views/src/Plugin/views/exposed_form/InputRequired.php
index 8b885978de465ea3a68de5b20cc90e82249b2467..38a5283606c9f8cee540b8b654fa387b226d00b1 100644
--- a/core/modules/views/src/Plugin/views/exposed_form/InputRequired.php
+++ b/core/modules/views/src/Plugin/views/exposed_form/InputRequired.php
@@ -21,28 +21,28 @@ class InputRequired extends ExposedFormPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['text_input_required'] = array('default' => $this->t('Select any filter and click on Apply to see results'));
-    $options['text_input_required_format'] = array('default' => NULL);
+    $options['text_input_required'] = ['default' => $this->t('Select any filter and click on Apply to see results')];
+    $options['text_input_required_format'] = ['default' => NULL];
     return $options;
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['text_input_required'] = array(
+    $form['text_input_required'] = [
       '#type' => 'text_format',
       '#title' => $this->t('Text on demand'),
       '#description' => $this->t('Text to display instead of results until the user selects and applies an exposed filter.'),
       '#default_value' => $this->options['text_input_required'],
       '#format' => isset($this->options['text_input_required_format']) ? $this->options['text_input_required_format'] : filter_default_format(),
       '#editor' => FALSE,
-    );
+    ];
   }
 
   public function submitOptionsForm(&$form, FormStateInterface $form_state) {
     $exposed_form_options = $form_state->getValue('exposed_form_options');
-    $form_state->setValue(array('exposed_form_options', 'text_input_required_format'), $exposed_form_options['text_input_required']['format']);
-    $form_state->setValue(array('exposed_form_options', 'text_input_required'), $exposed_form_options['text_input_required']['value']);
+    $form_state->setValue(['exposed_form_options', 'text_input_required_format'], $exposed_form_options['text_input_required']['format']);
+    $form_state->setValue(['exposed_form_options', 'text_input_required'], $exposed_form_options['text_input_required']['value']);
     parent::submitOptionsForm($form, $form_state);
   }
 
@@ -72,7 +72,7 @@ public function preRender($values) {
     // text to display instead of results until the user selects and applies
     // an exposed filter.
     if (!$this->exposedFilterApplied()) {
-      $options = array(
+      $options = [
         'id' => 'area',
         'table' => 'views',
         'field' => 'area',
@@ -88,14 +88,14 @@ public function preRender($values) {
           'value' => $this->options['text_input_required'],
           'format' => $this->options['text_input_required_format'],
         ],
-      );
+      ];
       $handler = Views::handlerManager('area')->getHandler($options);
       $handler->init($this->view, $this->displayHandler, $options);
-      $this->displayHandler->handlers['empty'] = array(
+      $this->displayHandler->handlers['empty'] = [
         'area' => $handler,
-      );
+      ];
       // Override the existing empty result message (if applicable).
-      $this->displayHandler->setOption('empty', array('text' => $options));
+      $this->displayHandler->setOption('empty', ['text' => $options]);
     }
   }
 
@@ -104,7 +104,7 @@ public function query() {
       // We return with no query; this will force the empty text.
       $this->view->built = TRUE;
       $this->view->executed = TRUE;
-      $this->view->result = array();
+      $this->view->result = [];
     }
     else {
       parent::query();
diff --git a/core/modules/views/src/Plugin/views/field/Boolean.php b/core/modules/views/src/Plugin/views/field/Boolean.php
index 59d3b292fbca7eb02f40d6e3866fd604aa12aec6..75f097e1348b7b4dc28ad5f2f993f3f2c9e96065 100644
--- a/core/modules/views/src/Plugin/views/field/Boolean.php
+++ b/core/modules/views/src/Plugin/views/field/Boolean.php
@@ -34,10 +34,10 @@ class Boolean extends FieldPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['type'] = array('default' => 'yes-no');
-    $options['type_custom_true'] = array('default' => '');
-    $options['type_custom_false'] = array('default' => '');
-    $options['not'] = array('default' => FALSE);
+    $options['type'] = ['default' => 'yes-no'];
+    $options['type_custom_true'] = ['default' => ''];
+    $options['type_custom_false'] = ['default' => ''];
+    $options['not'] = ['default' => FALSE];
 
     return $options;
   }
@@ -48,16 +48,16 @@ protected function defineOptions() {
   public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
     parent::init($view, $display, $options);
 
-    $default_formats = array(
-      'yes-no' => array(t('Yes'), $this->t('No')),
-      'true-false' => array(t('True'), $this->t('False')),
-      'on-off' => array(t('On'), $this->t('Off')),
-      'enabled-disabled' => array(t('Enabled'), $this->t('Disabled')),
-      'boolean' => array(1, 0),
-      'unicode-yes-no' => array('✔', '✖'),
-    );
-    $output_formats = isset($this->definition['output formats']) ? $this->definition['output formats'] : array();
-    $custom_format = array('custom' => array(t('Custom')));
+    $default_formats = [
+      'yes-no' => [t('Yes'), $this->t('No')],
+      'true-false' => [t('True'), $this->t('False')],
+      'on-off' => [t('On'), $this->t('Off')],
+      'enabled-disabled' => [t('Enabled'), $this->t('Disabled')],
+      'boolean' => [1, 0],
+      'unicode-yes-no' => ['✔', '✖'],
+    ];
+    $output_formats = isset($this->definition['output formats']) ? $this->definition['output formats'] : [];
+    $custom_format = ['custom' => [t('Custom')]];
     $this->formats = array_merge($default_formats, $output_formats, $custom_format);
   }
 
@@ -69,38 +69,38 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       $options[$key] = implode('/', $item);
     }
 
-    $form['type'] = array(
+    $form['type'] = [
       '#type' => 'select',
       '#title' => $this->t('Output format'),
       '#options' => $options,
       '#default_value' => $this->options['type'],
-    );
-    $form['type_custom_true'] = array(
+    ];
+    $form['type_custom_true'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Custom output for TRUE'),
       '#default_value' => $this->options['type_custom_true'],
-      '#states' => array(
-        'visible' => array(
-          'select[name="options[type]"]' => array('value' => 'custom'),
-        ),
-      ),
-    );
-    $form['type_custom_false'] = array(
+      '#states' => [
+        'visible' => [
+          'select[name="options[type]"]' => ['value' => 'custom'],
+        ],
+      ],
+    ];
+    $form['type_custom_false'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Custom output for FALSE'),
       '#default_value' => $this->options['type_custom_false'],
-      '#states' => array(
-        'visible' => array(
-          'select[name="options[type]"]' => array('value' => 'custom'),
-        ),
-      ),
-    );
-    $form['not'] = array(
+      '#states' => [
+        'visible' => [
+          'select[name="options[type]"]' => ['value' => 'custom'],
+        ],
+      ],
+    ];
+    $form['not'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Reverse'),
       '#description' => $this->t('If checked, true will be displayed as false.'),
       '#default_value' => $this->options['not'],
-    );
+    ];
     parent::buildOptionsForm($form, $form_state);
   }
 
diff --git a/core/modules/views/src/Plugin/views/field/Counter.php b/core/modules/views/src/Plugin/views/field/Counter.php
index 06d9b561688f971ffc1d4a507d2fc3d7cd132555..d32e5e754eb936ce0d65da40f7416f7460b86f9e 100644
--- a/core/modules/views/src/Plugin/views/field/Counter.php
+++ b/core/modules/views/src/Plugin/views/field/Counter.php
@@ -28,7 +28,7 @@ public function usesGroupBy() {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['counter_start'] = array('default' => 1);
+    $options['counter_start'] = ['default' => 1];
     return $options;
   }
 
@@ -36,13 +36,13 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['counter_start'] = array(
+    $form['counter_start'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Starting value'),
       '#default_value' => $this->options['counter_start'],
       '#description' => $this->t('Specify the number the counter should start at.'),
       '#size' => 2,
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
diff --git a/core/modules/views/src/Plugin/views/field/Custom.php b/core/modules/views/src/Plugin/views/field/Custom.php
index 19552b223e565ca56b416f98bfad3844c4ff995a..6dfa8ac15e444bca95f3570fa08cfbcbc88deeb1 100644
--- a/core/modules/views/src/Plugin/views/field/Custom.php
+++ b/core/modules/views/src/Plugin/views/field/Custom.php
@@ -37,8 +37,8 @@ protected function defineOptions() {
     $options = parent::defineOptions();
 
     // Override the alter text option to always alter the text.
-    $options['alter']['contains']['alter_text'] = array('default' => TRUE);
-    $options['hide_alter_empty'] = array('default' => FALSE);
+    $options['alter']['contains']['alter_text'] = ['default' => TRUE];
+    $options['hide_alter_empty'] = ['default' => FALSE];
     return $options;
   }
 
@@ -52,7 +52,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     unset($form['alter']['alter_text']);
     unset($form['alter']['text']['#states']);
     unset($form['alter']['help']['#states']);
-    $form['#pre_render'][] = array($this, 'preRenderCustomForm');
+    $form['#pre_render'][] = [$this, 'preRenderCustomForm'];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/field/Date.php b/core/modules/views/src/Plugin/views/field/Date.php
index f5a5204b1967da84b8d8adbbeef13ad79984a5ef..37455cc783fcfcbda0bf2ef66a2a61be7ca8a000 100644
--- a/core/modules/views/src/Plugin/views/field/Date.php
+++ b/core/modules/views/src/Plugin/views/field/Date.php
@@ -71,9 +71,9 @@ public static function create(ContainerInterface $container, array $configuratio
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['date_format'] = array('default' => 'small');
-    $options['custom_date_format'] = array('default' => '');
-    $options['timezone'] = array('default' => '');
+    $options['date_format'] = ['default' => 'small'];
+    $options['custom_date_format'] = ['default' => ''];
+    $options['timezone'] = ['default' => ''];
 
     return $options;
   }
@@ -83,15 +83,15 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
-    $date_formats = array();
+    $date_formats = [];
     foreach ($this->dateFormatStorage->loadMultiple() as $machine_name => $value) {
-      $date_formats[$machine_name] = $this->t('@name format: @date', array('@name' => $value->label(), '@date' => $this->dateFormatter->format(REQUEST_TIME, $machine_name)));
+      $date_formats[$machine_name] = $this->t('@name format: @date', ['@name' => $value->label(), '@date' => $this->dateFormatter->format(REQUEST_TIME, $machine_name)]);
     }
 
-    $form['date_format'] = array(
+    $form['date_format'] = [
       '#type' => 'select',
       '#title' => $this->t('Date format'),
-      '#options' => $date_formats + array(
+      '#options' => $date_formats + [
         'custom' => $this->t('Custom'),
         'raw time ago' => $this->t('Time ago'),
         'time ago' => $this->t('Time ago (with "ago" appended)'),
@@ -100,32 +100,32 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         'raw time span' => $this->t('Time span (future dates have "-" prepended)'),
         'inverse time span' => $this->t('Time span (past dates have "-" prepended)'),
         'time span' => $this->t('Time span (with "ago/hence" appended)'),
-      ),
+      ],
       '#default_value' => isset($this->options['date_format']) ? $this->options['date_format'] : 'small',
-    );
-    $form['custom_date_format'] = array(
+    ];
+    $form['custom_date_format'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Custom date format'),
       '#description' => $this->t('If "Custom", see <a href="http://us.php.net/manual/en/function.date.php" target="_blank">the PHP docs</a> for date formats. Otherwise, enter the number of different time units to display, which defaults to 2.'),
       '#default_value' => isset($this->options['custom_date_format']) ? $this->options['custom_date_format'] : '',
-    );
+    ];
     // Setup #states for all possible date_formats on the custom_date_format form element.
-    foreach (array('custom', 'raw time ago', 'time ago', 'raw time hence', 'time hence', 'raw time span', 'time span', 'raw time span', 'inverse time span', 'time span') as $custom_date_possible) {
-      $form['custom_date_format']['#states']['visible'][] = array(
-        ':input[name="options[date_format]"]' => array('value' => $custom_date_possible),
-      );
+    foreach (['custom', 'raw time ago', 'time ago', 'raw time hence', 'time hence', 'raw time span', 'time span', 'raw time span', 'inverse time span', 'time span'] as $custom_date_possible) {
+      $form['custom_date_format']['#states']['visible'][] = [
+        ':input[name="options[date_format]"]' => ['value' => $custom_date_possible],
+      ];
     }
-    $form['timezone'] = array(
+    $form['timezone'] = [
       '#type' => 'select',
       '#title' => $this->t('Timezone'),
       '#description' => $this->t('Timezone to be used for date output.'),
-      '#options' => array('' => $this->t('- Default site/user timezone -')) + system_time_zones(FALSE),
+      '#options' => ['' => $this->t('- Default site/user timezone -')] + system_time_zones(FALSE),
       '#default_value' => $this->options['timezone'],
-    );
-    foreach (array_merge(array('custom'), array_keys($date_formats)) as $timezone_date_formats) {
-      $form['timezone']['#states']['visible'][] = array(
-        ':input[name="options[date_format]"]' => array('value' => $timezone_date_formats),
-      );
+    ];
+    foreach (array_merge(['custom'], array_keys($date_formats)) as $timezone_date_formats) {
+      $form['timezone']['#states']['visible'][] = [
+        ':input[name="options[date_format]"]' => ['value' => $timezone_date_formats],
+      ];
     }
 
     parent::buildOptionsForm($form, $form_state);
@@ -137,7 +137,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
   public function render(ResultRow $values) {
     $value = $this->getValue($values);
     $format = $this->options['date_format'];
-    if (in_array($format, array('custom', 'raw time ago', 'time ago', 'raw time hence', 'time hence', 'raw time span', 'time span', 'raw time span', 'inverse time span', 'time span'))) {
+    if (in_array($format, ['custom', 'raw time ago', 'time ago', 'raw time hence', 'time hence', 'raw time span', 'time span', 'raw time span', 'inverse time span', 'time span'])) {
       $custom_format = $this->options['custom_date_format'];
     }
 
@@ -146,26 +146,26 @@ public function render(ResultRow $values) {
       $time_diff = REQUEST_TIME - $value; // will be positive for a datetime in the past (ago), and negative for a datetime in the future (hence)
       switch ($format) {
         case 'raw time ago':
-          return $this->dateFormatter->formatTimeDiffSince($value, array('granularity' => is_numeric($custom_format) ? $custom_format : 2));
+          return $this->dateFormatter->formatTimeDiffSince($value, ['granularity' => is_numeric($custom_format) ? $custom_format : 2]);
 
         case 'time ago':
-          return $this->t('%time ago', array('%time' => $this->dateFormatter->formatTimeDiffSince($value, array('granularity' => is_numeric($custom_format) ? $custom_format : 2))));
+          return $this->t('%time ago', ['%time' => $this->dateFormatter->formatTimeDiffSince($value, ['granularity' => is_numeric($custom_format) ? $custom_format : 2])]);
 
         case 'raw time hence':
-          return $this->dateFormatter->formatTimeDiffUntil($value, array('granularity' => is_numeric($custom_format) ? $custom_format : 2));
+          return $this->dateFormatter->formatTimeDiffUntil($value, ['granularity' => is_numeric($custom_format) ? $custom_format : 2]);
 
         case 'time hence':
-          return $this->t('%time hence', array('%time' => $this->dateFormatter->formatTimeDiffUntil($value, array('granularity' => is_numeric($custom_format) ? $custom_format : 2))));
+          return $this->t('%time hence', ['%time' => $this->dateFormatter->formatTimeDiffUntil($value, ['granularity' => is_numeric($custom_format) ? $custom_format : 2])]);
 
         case 'raw time span':
-          return ($time_diff < 0 ? '-' : '') . $this->dateFormatter->formatTimeDiffSince($value, array('strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2));
+          return ($time_diff < 0 ? '-' : '') . $this->dateFormatter->formatTimeDiffSince($value, ['strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2]);
 
         case 'inverse time span':
-          return ($time_diff > 0 ? '-' : '') . $this->dateFormatter->formatTimeDiffSince($value, array('strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2));
+          return ($time_diff > 0 ? '-' : '') . $this->dateFormatter->formatTimeDiffSince($value, ['strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2]);
 
         case 'time span':
-          $time = $this->dateFormatter->formatTimeDiffSince($value, array('strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2));
-          return ($time_diff < 0) ? $this->t('%time hence', array('%time' => $time)) : $this->t('%time ago', array('%time' => $time));
+          $time = $this->dateFormatter->formatTimeDiffSince($value, ['strict' => FALSE, 'granularity' => is_numeric($custom_format) ? $custom_format : 2]);
+          return ($time_diff < 0) ? $this->t('%time hence', ['%time' => $time]) : $this->t('%time ago', ['%time' => $time]);
 
         case 'custom':
           if ($custom_format == 'r') {
diff --git a/core/modules/views/src/Plugin/views/field/Dropbutton.php b/core/modules/views/src/Plugin/views/field/Dropbutton.php
index f5cf4d34553d0b8939791ef3a4e8c504ae8918ae..b5a9b60dc563bcee0ac29f58abb2e7a1c2827215 100644
--- a/core/modules/views/src/Plugin/views/field/Dropbutton.php
+++ b/core/modules/views/src/Plugin/views/field/Dropbutton.php
@@ -20,10 +20,10 @@ public function render(ResultRow $values) {
     $links = $this->getLinks();
 
     if (!empty($links)) {
-      return array(
+      return [
         '#type' => 'dropbutton',
         '#links' => $links,
-      );
+      ];
     }
     else {
       return '';
diff --git a/core/modules/views/src/Plugin/views/field/EntityField.php b/core/modules/views/src/Plugin/views/field/EntityField.php
index dfabda3a3f93be764602285fcf730a7bedd3186f..6a0c762191f42ee51113992aa62a54b2cfba1884 100644
--- a/core/modules/views/src/Plugin/views/field/EntityField.php
+++ b/core/modules/views/src/Plugin/views/field/EntityField.php
@@ -44,7 +44,7 @@ class EntityField extends FieldPluginBase implements CacheableDependencyInterfac
    *
    * @var array
    */
-  public $items = array();
+  public $items = [];
 
   /**
    * Does the field supports multiple field values.
@@ -232,14 +232,14 @@ public function query($use_groupby = FALSE) {
 
     if ($use_groupby) {
       // Add the fields that we're actually grouping on.
-      $options = array();
+      $options = [];
       if ($this->options['group_column'] != 'entity_id') {
-        $options = array($this->options['group_column'] => $this->options['group_column']);
+        $options = [$this->options['group_column'] => $this->options['group_column']];
       }
-      $options += is_array($this->options['group_columns']) ? $this->options['group_columns'] : array();
+      $options += is_array($this->options['group_columns']) ? $this->options['group_columns'] : [];
 
       // Go through the list and determine the actual column name from field api.
-      $fields = array();
+      $fields = [];
       $table_mapping = $this->getTableMapping();
       $field_definition = $this->getFieldStorageDefinition();
 
@@ -354,9 +354,9 @@ protected function defineOptions() {
     }
 
     // If the field has a "value" column, we probably need that one.
-    $options['click_sort_column'] = array(
+    $options['click_sort_column'] = [
       'default' => $default_column,
-    );
+    ];
 
     if (isset($this->definition['default_formatter'])) {
       $options['type'] = ['default' => $this->definition['default_formatter']];
@@ -368,45 +368,45 @@ protected function defineOptions() {
       $options['type'] = ['default' => ''];
     }
 
-    $options['settings'] = array(
+    $options['settings'] = [
       'default' => isset($this->definition['default_formatter_settings']) ? $this->definition['default_formatter_settings'] : [],
-    );
-    $options['group_column'] = array(
+    ];
+    $options['group_column'] = [
       'default' => $default_column,
-    );
-    $options['group_columns'] = array(
-      'default' => array(),
-    );
+    ];
+    $options['group_columns'] = [
+      'default' => [],
+    ];
 
     // Options used for multiple value fields.
-    $options['group_rows'] = array(
+    $options['group_rows'] = [
       'default' => TRUE,
-    );
+    ];
     // If we know the exact number of allowed values, then that can be
     // the default. Otherwise, default to 'all'.
-    $options['delta_limit'] = array(
+    $options['delta_limit'] = [
       'default' => ($field_storage_definition->getCardinality() > 1) ? $field_storage_definition->getCardinality() : 0,
-    );
-    $options['delta_offset'] = array(
+    ];
+    $options['delta_offset'] = [
       'default' => 0,
-    );
-    $options['delta_reversed'] = array(
+    ];
+    $options['delta_reversed'] = [
       'default' => FALSE,
-    );
-    $options['delta_first_last'] = array(
+    ];
+    $options['delta_first_last'] = [
       'default' => FALSE,
-    );
+    ];
 
-    $options['multi_type'] = array(
+    $options['multi_type'] = [
       'default' => 'separator'
-    );
-    $options['separator'] = array(
+    ];
+    $options['separator'] = [
       'default' => ', '
-    );
+    ];
 
-    $options['field_api_classes'] = array(
+    $options['field_api_classes'] = [
       'default' => FALSE,
-    );
+    ];
 
     return $options;
   }
@@ -428,48 +428,48 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     // No need to ask the user anything if the field has only one column.
     if (count($field->getColumns()) == 1) {
-      $form['click_sort_column'] = array(
+      $form['click_sort_column'] = [
         '#type' => 'value',
         '#value' => isset($column_names[0]) ? $column_names[0] : '',
-      );
+      ];
     }
     else {
-      $form['click_sort_column'] = array(
+      $form['click_sort_column'] = [
         '#type' => 'select',
         '#title' => $this->t('Column used for click sorting'),
         '#options' => array_combine($column_names, $column_names),
         '#default_value' => $this->options['click_sort_column'],
         '#description' => $this->t('Used by Style: Table to determine the actual column to click sort the field on. The default is usually fine.'),
-      );
+      ];
     }
 
-    $form['type'] = array(
+    $form['type'] = [
       '#type' => 'select',
       '#title' => $this->t('Formatter'),
       '#options' => $formatters,
       '#default_value' => $this->options['type'],
-      '#ajax' => array(
+      '#ajax' => [
         'url' => views_ui_build_form_url($form_state),
-      ),
-      '#submit' => array(array($this, 'submitTemporaryForm')),
+      ],
+      '#submit' => [[$this, 'submitTemporaryForm']],
       '#executes_submit_callback' => TRUE,
-    );
+    ];
 
-    $form['field_api_classes'] = array(
+    $form['field_api_classes'] = [
       '#title' => $this->t('Use field template'),
       '#type' => 'checkbox',
       '#default_value' => $this->options['field_api_classes'],
       '#description' => $this->t('If checked, field api classes will be added by field templates. This is not recommended unless your CSS depends upon these classes. If not checked, template will not be used.'),
       '#fieldset' => 'style_settings',
       '#weight' => 20,
-    );
+    ];
 
     if ($this->multiple) {
       $form['field_api_classes']['#description'] .= ' ' . $this->t('Checking this option will cause the group Display Type and Separator values to be ignored.');
     }
 
     // Get the settings form.
-    $settings_form = array('#value' => array());
+    $settings_form = ['#value' => []];
     $format = isset($form_state->getUserInput()['options']['type']) ? $form_state->getUserInput()['options']['type'] : $this->options['type'];
     if ($formatter = $this->getFormatterInstance($format)) {
       $settings_form = $formatter->settingsForm($form, $form_state);
@@ -500,19 +500,19 @@ public function submitFormCalculateOptions(array $options, array $form_state_opt
   function multiple_options_form(&$form, FormStateInterface $form_state) {
     $field = $this->getFieldDefinition();
 
-    $form['multiple_field_settings'] = array(
+    $form['multiple_field_settings'] = [
       '#type' => 'details',
       '#title' => $this->t('Multiple field settings'),
       '#weight' => 5,
-    );
+    ];
 
-    $form['group_rows'] = array(
+    $form['group_rows'] = [
       '#title' => $this->t('Display all values in the same row'),
       '#type' => 'checkbox',
       '#default_value' => $this->options['group_rows'],
       '#description' => $this->t('If checked, multiple values for this field will be shown in the same row. If not checked, each value in this field will create a new row. If using group by, please make sure to group by "Entity ID" for this setting to have any effect.'),
       '#fieldset' => 'multiple_field_settings',
-    );
+    ];
 
     // Make the string translatable by keeping it as a whole rather than
     // translating prefix and suffix separately.
@@ -529,37 +529,37 @@ function multiple_options_form(&$form, FormStateInterface $form_state) {
       $options = array_combine($range, $range);
       $size = 1;
     }
-    $form['multi_type'] = array(
+    $form['multi_type'] = [
       '#type' => 'radios',
       '#title' => $this->t('Display type'),
-      '#options' => array(
+      '#options' => [
         'ul' => $this->t('Unordered list'),
         'ol' => $this->t('Ordered list'),
         'separator' => $this->t('Simple separator'),
-      ),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[group_rows]"]' => array('checked' => TRUE),
-        ),
-      ),
+      ],
+      '#states' => [
+        'visible' => [
+          ':input[name="options[group_rows]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#default_value' => $this->options['multi_type'],
       '#fieldset' => 'multiple_field_settings',
-    );
+    ];
 
-    $form['separator'] = array(
+    $form['separator'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Separator'),
       '#default_value' => $this->options['separator'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[group_rows]"]' => array('checked' => TRUE),
-          ':input[name="options[multi_type]"]' => array('value' => 'separator'),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[group_rows]"]' => ['checked' => TRUE],
+          ':input[name="options[multi_type]"]' => ['value' => 'separator'],
+        ],
+      ],
       '#fieldset' => 'multiple_field_settings',
-    );
+    ];
 
-    $form['delta_limit'] = array(
+    $form['delta_limit'] = [
       '#type' => $type,
       '#size' => $size,
       '#field_prefix' => $prefix,
@@ -567,54 +567,54 @@ function multiple_options_form(&$form, FormStateInterface $form_state) {
       '#options' => $options,
       '#default_value' => $this->options['delta_limit'],
       '#prefix' => '<div class="container-inline">',
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[group_rows]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[group_rows]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'multiple_field_settings',
-    );
+    ];
 
     list($prefix, $suffix) = explode('@count', $this->t('starting from @count'));
-    $form['delta_offset'] = array(
+    $form['delta_offset'] = [
       '#type' => 'textfield',
       '#size' => 5,
       '#field_prefix' => $prefix,
       '#field_suffix' => $suffix,
       '#default_value' => $this->options['delta_offset'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[group_rows]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[group_rows]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#description' => $this->t('(first item is 0)'),
       '#fieldset' => 'multiple_field_settings',
-    );
-    $form['delta_reversed'] = array(
+    ];
+    $form['delta_reversed'] = [
       '#title' => $this->t('Reversed'),
       '#type' => 'checkbox',
       '#default_value' => $this->options['delta_reversed'],
       '#suffix' => $suffix,
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[group_rows]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[group_rows]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#description' => $this->t('(start from last values)'),
       '#fieldset' => 'multiple_field_settings',
-    );
-    $form['delta_first_last'] = array(
+    ];
+    $form['delta_first_last'] = [
       '#title' => $this->t('First and last only'),
       '#type' => 'checkbox',
       '#default_value' => $this->options['delta_first_last'],
       '#suffix' => '</div>',
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[group_rows]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[group_rows]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'multiple_field_settings',
-    );
+    ];
   }
 
   /**
@@ -626,31 +626,31 @@ public function buildGroupByForm(&$form, FormStateInterface $form_state) {
     // and any additional grouping columns must be specified.
 
     $field_columns = array_keys($this->getFieldDefinition()->getColumns());
-    $group_columns = array(
+    $group_columns = [
       'entity_id' => $this->t('Entity ID'),
-    ) + array_map('ucfirst', array_combine($field_columns, $field_columns));
+    ] + array_map('ucfirst', array_combine($field_columns, $field_columns));
 
-    $form['group_column'] = array(
+    $form['group_column'] = [
       '#type' => 'select',
       '#title' => $this->t('Group column'),
       '#default_value' => $this->options['group_column'],
       '#description' => $this->t('Select the column of this field to apply the grouping function selected above.'),
       '#options' => $group_columns,
-    );
+    ];
 
-    $options = array(
+    $options = [
       'bundle' => 'Bundle',
       'language' => 'Language',
       'entity_type' => 'Entity_type',
-    );
+    ];
     // Add on defined fields, noting that they're prefixed with the field name.
-    $form['group_columns'] = array(
+    $form['group_columns'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Group columns (additional)'),
       '#default_value' => $this->options['group_columns'],
       '#description' => $this->t('Select any additional columns of this field to include in the query and to group on.'),
       '#options' => $options + $group_columns,
-    );
+    ];
   }
 
   public function submitGroupByForm(&$form, FormStateInterface $form_state) {
@@ -658,8 +658,8 @@ public function submitGroupByForm(&$form, FormStateInterface $form_state) {
     $item = &$form_state->get('handler')->options;
 
     // Add settings for "field API" fields.
-    $item['group_column'] = $form_state->getValue(array('options', 'group_column'));
-    $item['group_columns'] = array_filter($form_state->getValue(array('options', 'group_columns')));
+    $item['group_column'] = $form_state->getValue(['options', 'group_column']);
+    $item['group_columns'] = array_filter($form_state->getValue(['options', 'group_columns']));
   }
 
   /**
@@ -680,12 +680,12 @@ public function renderItems($items) {
         ];
       }
       else {
-        $build = array(
+        $build = [
           '#theme' => 'item_list',
           '#items' => $items,
           '#title' => NULL,
           '#list_type' => $this->options['multi_type'],
-        );
+        ];
       }
       return $this->renderer->render($build);
     }
@@ -738,7 +738,7 @@ protected function prepareItemsByDelta(array $all_values) {
       // Determine if only the first and last values should be shown.
       $delta_first_last = $this->options['delta_first_last'];
 
-      $new_values = array();
+      $new_values = [];
       for ($i = 0; $i < $delta_limit; $i++) {
         $new_delta = $offset + $i;
 
@@ -877,7 +877,7 @@ protected function createEntityForGroupBy(EntityInterface $entity, ResultRow $ro
     // cause some weirdness, but there is only so much we can hope to do.
     if (!empty($this->group_fields) && isset($entity->{$this->definition['field_name']})) {
       // first, test to see if we have a base value.
-      $base_value = array();
+      $base_value = [];
       // Note: We would copy original values here, but it can cause problems.
       // For example, text fields store cached filtered values as 'safe_value'
       // which does not appear anywhere in the field definition so we cannot
@@ -896,10 +896,10 @@ protected function createEntityForGroupBy(EntityInterface $entity, ResultRow $ro
       if ($data) {
         // Now, overwrite the original value with our aggregated value.
         // This overwrites it so there is always just one entry.
-        $processed_entity->{$this->definition['field_name']} = array($base_value);
+        $processed_entity->{$this->definition['field_name']} = [$base_value];
       }
       else {
-        $processed_entity->{$this->definition['field_name']} = array();
+        $processed_entity->{$this->definition['field_name']} = [];
       }
     }
 
@@ -913,7 +913,7 @@ function render_item($count, $item) {
   protected function documentSelfTokens(&$tokens) {
     $field = $this->getFieldDefinition();
     foreach ($field->getColumns() as $id => $column) {
-      $tokens['{{ ' . $this->options['id'] . '__' . $id . ' }}'] = $this->t('Raw @column', array('@column' => $id));
+      $tokens['{{ ' . $this->options['id'] . '__' . $id . ' }}'] = $this->t('Raw @column', ['@column' => $id]);
     }
   }
 
diff --git a/core/modules/views/src/Plugin/views/field/EntityLabel.php b/core/modules/views/src/Plugin/views/field/EntityLabel.php
index 967fd526b7890cacdc5cceae3940e80541c5732e..86ccd05449a4a7f031898d2fc291fdae2a49ba1c 100644
--- a/core/modules/views/src/Plugin/views/field/EntityLabel.php
+++ b/core/modules/views/src/Plugin/views/field/EntityLabel.php
@@ -23,7 +23,7 @@ class EntityLabel extends FieldPluginBase {
    *
    * @var array
    */
-  protected $loadedReferencers = array();
+  protected $loadedReferencers = [];
 
   /**
    * EntityManager class.
@@ -75,7 +75,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['link_to_entity'] = array('default' => FALSE);
+    $options['link_to_entity'] = ['default' => FALSE];
     return $options;
   }
 
@@ -83,12 +83,12 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['link_to_entity'] = array(
+    $form['link_to_entity'] = [
       '#title' => $this->t('Link to entity'),
       '#description' => $this->t('Make entity label a link to entity page.'),
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['link_to_entity']),
-    );
+    ];
     parent::buildOptionsForm($form, $form_state);
   }
 
@@ -128,7 +128,7 @@ public function render(ResultRow $values) {
   public function preRender(&$values) {
     parent::preRender($values);
 
-    $entity_ids_per_type = array();
+    $entity_ids_per_type = [];
     foreach ($values as $value) {
       if ($type = $this->getValue($value, 'type')) {
         $entity_ids_per_type[$type][] = $this->getValue($value);
diff --git a/core/modules/views/src/Plugin/views/field/EntityOperations.php b/core/modules/views/src/Plugin/views/field/EntityOperations.php
index f2a3ba997cd2bae9e15805e90ede954e840c9cf2..c8a307bd1dbcd7bcb9149faa93b2419570ac7574 100644
--- a/core/modules/views/src/Plugin/views/field/EntityOperations.php
+++ b/core/modules/views/src/Plugin/views/field/EntityOperations.php
@@ -83,9 +83,9 @@ public function usesGroupBy() {
   public function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['destination'] = array(
+    $options['destination'] = [
       'default' => TRUE,
-    );
+    ];
 
     return $options;
   }
@@ -96,12 +96,12 @@ public function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['destination'] = array(
+    $form['destination'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Include destination'),
       '#description' => $this->t('Include a <code>destination</code> parameter in the link to return the user to the original view upon completing the link action.'),
       '#default_value' => $this->options['destination'],
-    );
+    ];
   }
 
   /**
@@ -113,15 +113,15 @@ public function render(ResultRow $values) {
     if ($this->options['destination']) {
       foreach ($operations as &$operation) {
         if (!isset($operation['query'])) {
-          $operation['query'] = array();
+          $operation['query'] = [];
         }
         $operation['query'] += $this->getDestinationArray();
       }
     }
-    $build = array(
+    $build = [
       '#type' => 'operations',
       '#links' => $operations,
-    );
+    ];
 
     return $build;
   }
diff --git a/core/modules/views/src/Plugin/views/field/FieldPluginBase.php b/core/modules/views/src/Plugin/views/field/FieldPluginBase.php
index 1432972b6ce6b61d62a8b16661bbbea326e593c6..8291fed53fd5180e8b59dfe2fd5049bf26655d5b 100644
--- a/core/modules/views/src/Plugin/views/field/FieldPluginBase.php
+++ b/core/modules/views/src/Plugin/views/field/FieldPluginBase.php
@@ -69,7 +69,7 @@ abstract class FieldPluginBase extends HandlerBase implements FieldHandlerInterf
   const RENDER_TEXT_PHASE_EMPTY = 2;
 
   public $field_alias = 'unknown';
-  public $aliases = array();
+  public $aliases = [];
 
   /**
    * The field value prior to any rewriting.
@@ -85,7 +85,7 @@ abstract class FieldPluginBase extends HandlerBase implements FieldHandlerInterf
    *
    * @var array
    */
-  public $additional_fields = array();
+  public $additional_fields = [];
 
   /**
    * The link generator.
@@ -114,7 +114,7 @@ abstract class FieldPluginBase extends HandlerBase implements FieldHandlerInterf
   public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
     parent::init($view, $display, $options);
 
-    $this->additional_fields = array();
+    $this->additional_fields = [];
     if (!empty($this->definition['additional fields'])) {
       $this->additional_fields = $this->definition['additional fields'];
     }
@@ -140,7 +140,7 @@ protected function allowAdvancedRender() {
   public function query() {
     $this->ensureMyTable();
     // Add the field.
-    $params = $this->options['group_type'] != 'group' ? array('function' => $this->options['group_type']) : array();
+    $params = $this->options['group_type'] != 'group' ? ['function' => $this->options['group_type']] : [];
     $this->field_alias = $this->query->addField($this->tableAlias, $this->realField, NULL, $params);
 
     $this->addAdditionalFields();
@@ -165,11 +165,11 @@ protected function addAdditionalFields($fields = NULL) {
       $fields = $this->additional_fields;
     }
 
-    $group_params = array();
+    $group_params = [];
     if ($this->options['group_type'] != 'group') {
-      $group_params = array(
+      $group_params = [
         'function' => $this->options['group_type'],
-      );
+      ];
     }
 
     if (!empty($fields) && is_array($fields)) {
@@ -183,12 +183,12 @@ protected function addAdditionalFields($fields = NULL) {
           }
 
           if (empty($table_alias)) {
-            debug(t('Handler @handler tried to add additional_field @identifier but @table could not be added!', array('@handler' => $this->definition['id'], '@identifier' => $identifier, '@table' => $info['table'])));
+            debug(t('Handler @handler tried to add additional_field @identifier but @table could not be added!', ['@handler' => $this->definition['id'], '@identifier' => $identifier, '@table' => $info['table']]));
             $this->aliases[$identifier] = 'broken';
             continue;
           }
 
-          $params = array();
+          $params = [];
           if (!empty($info['params'])) {
             $params = $info['params'];
           }
@@ -210,7 +210,7 @@ public function clickSort($order) {
     if (isset($this->field_alias)) {
       // Since fields should always have themselves already added, just
       // add a sort on the field.
-      $params = $this->options['group_type'] != 'group' ? array('function' => $this->options['group_type']) : array();
+      $params = $this->options['group_type'] != 'group' ? ['function' => $this->options['group_type']] : [];
       $this->query->addOrderBy(NULL, NULL, $order, $this->field_alias, $params);
     }
   }
@@ -307,10 +307,10 @@ public function getElements() {
     static $elements = NULL;
     if (!isset($elements)) {
       // @todo Add possible html5 elements.
-      $elements = array(
+      $elements = [
         '' => $this->t('- Use default -'),
         '0' => $this->t('- None -')
-      );
+      ];
       $elements += \Drupal::config('views.settings')->get('field_rewrite_elements');
     }
 
@@ -334,10 +334,10 @@ public function elementClasses($row_index = NULL) {
    */
   public function tokenizeValue($value, $row_index = NULL) {
     if (strpos($value, '{{') !== FALSE) {
-      $fake_item = array(
+      $fake_item = [
         'alter_text' => TRUE,
         'text' => $value,
-      );
+      ];
 
       // Use isset() because empty() will trigger on 0 and 0 is
       // the first row.
@@ -421,60 +421,60 @@ public function useStringGroupBy() {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['label'] = array('default' => '');
+    $options['label'] = ['default' => ''];
     // Some styles (for example table) should have labels enabled by default.
     $style = $this->view->getStyle();
     if (isset($style) && $style->defaultFieldLabels()) {
       $options['label']['default'] = $this->definition['title'];
     }
 
-    $options['exclude'] = array('default' => FALSE);
-    $options['alter'] = array(
-      'contains' => array(
-        'alter_text' => array('default' => FALSE),
-        'text' => array('default' => ''),
-        'make_link' => array('default' => FALSE),
-        'path' => array('default' => ''),
-        'absolute' => array('default' => FALSE),
-        'external' => array('default' => FALSE),
-        'replace_spaces' => array('default' => FALSE),
-        'path_case' => array('default' => 'none'),
-        'trim_whitespace' => array('default' => FALSE),
-        'alt' => array('default' => ''),
-        'rel' => array('default' => ''),
-        'link_class' => array('default' => ''),
-        'prefix' => array('default' => ''),
-        'suffix' => array('default' => ''),
-        'target' => array('default' => ''),
-        'nl2br' => array('default' => FALSE),
-        'max_length' => array('default' => 0),
-        'word_boundary' => array('default' => TRUE),
-        'ellipsis' => array('default' => TRUE),
-        'more_link' => array('default' => FALSE),
-        'more_link_text' => array('default' => ''),
-        'more_link_path' => array('default' => ''),
-        'strip_tags' => array('default' => FALSE),
-        'trim' => array('default' => FALSE),
-        'preserve_tags' => array('default' => ''),
-        'html' => array('default' => FALSE),
-      ),
-    );
-    $options['element_type'] = array('default' => '');
-    $options['element_class'] = array('default' => '');
-
-    $options['element_label_type'] = array('default' => '');
-    $options['element_label_class'] = array('default' => '');
-    $options['element_label_colon'] = array('default' => TRUE);
-
-    $options['element_wrapper_type'] = array('default' => '');
-    $options['element_wrapper_class'] = array('default' => '');
-
-    $options['element_default_classes'] = array('default' => TRUE);
-
-    $options['empty'] = array('default' => '');
-    $options['hide_empty'] = array('default' => FALSE);
-    $options['empty_zero'] = array('default' => FALSE);
-    $options['hide_alter_empty'] = array('default' => TRUE);
+    $options['exclude'] = ['default' => FALSE];
+    $options['alter'] = [
+      'contains' => [
+        'alter_text' => ['default' => FALSE],
+        'text' => ['default' => ''],
+        'make_link' => ['default' => FALSE],
+        'path' => ['default' => ''],
+        'absolute' => ['default' => FALSE],
+        'external' => ['default' => FALSE],
+        'replace_spaces' => ['default' => FALSE],
+        'path_case' => ['default' => 'none'],
+        'trim_whitespace' => ['default' => FALSE],
+        'alt' => ['default' => ''],
+        'rel' => ['default' => ''],
+        'link_class' => ['default' => ''],
+        'prefix' => ['default' => ''],
+        'suffix' => ['default' => ''],
+        'target' => ['default' => ''],
+        'nl2br' => ['default' => FALSE],
+        'max_length' => ['default' => 0],
+        'word_boundary' => ['default' => TRUE],
+        'ellipsis' => ['default' => TRUE],
+        'more_link' => ['default' => FALSE],
+        'more_link_text' => ['default' => ''],
+        'more_link_path' => ['default' => ''],
+        'strip_tags' => ['default' => FALSE],
+        'trim' => ['default' => FALSE],
+        'preserve_tags' => ['default' => ''],
+        'html' => ['default' => FALSE],
+      ],
+    ];
+    $options['element_type'] = ['default' => ''];
+    $options['element_class'] = ['default' => ''];
+
+    $options['element_label_type'] = ['default' => ''];
+    $options['element_label_class'] = ['default' => ''];
+    $options['element_label_colon'] = ['default' => TRUE];
+
+    $options['element_wrapper_type'] = ['default' => ''];
+    $options['element_wrapper_class'] = ['default' => ''];
+
+    $options['element_default_classes'] = ['default' => TRUE];
+
+    $options['empty'] = ['default' => ''];
+    $options['hide_empty'] = ['default' => FALSE];
+    $options['empty_zero'] = ['default' => FALSE];
+    $options['hide_alter_empty'] = ['default' => TRUE];
 
     return $options;
   }
@@ -484,8 +484,8 @@ protected function defineOptions() {
    */
   public function submitOptionsForm(&$form, FormStateInterface $form_state) {
     $options = &$form_state->getValue('options');
-    $types = array('element_type', 'element_label_type', 'element_wrapper_type');
-    $classes = array_combine(array('element_class', 'element_label_class', 'element_wrapper_class'), $types);
+    $types = ['element_type', 'element_label_type', 'element_wrapper_type'];
+    $classes = array_combine(['element_class', 'element_label_class', 'element_wrapper_class'], $types);
 
     foreach ($types as $type) {
       if (!$options[$type . '_enable']) {
@@ -513,349 +513,349 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
     $label = $this->label();
-    $form['custom_label'] = array(
+    $form['custom_label'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Create a label'),
       '#default_value' => $label !== '',
       '#weight' => -103,
-    );
-    $form['label'] = array(
+    ];
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Label'),
       '#default_value' => $label,
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[custom_label]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[custom_label]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#weight' => -102,
-    );
-    $form['element_label_colon'] = array(
+    ];
+    $form['element_label_colon'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Place a colon after the label'),
       '#default_value' => $this->options['element_label_colon'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[custom_label]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[custom_label]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#weight' => -101,
-    );
+    ];
 
-    $form['exclude'] = array(
+    $form['exclude'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Exclude from display'),
       '#default_value' => $this->options['exclude'],
       '#description' => $this->t('Enable to load this field as hidden. Often used to group fields, or to use as token in another field.'),
       '#weight' => -100,
-    );
+    ];
 
-    $form['style_settings'] = array(
+    $form['style_settings'] = [
       '#type' => 'details',
       '#title' => $this->t('Style settings'),
       '#weight' => 99,
-    );
+    ];
 
-    $form['element_type_enable'] = array(
+    $form['element_type_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Customize field HTML'),
       '#default_value' => !empty($this->options['element_type']) || (string) $this->options['element_type'] == '0' || !empty($this->options['element_class']) || (string) $this->options['element_class'] == '0',
       '#fieldset' => 'style_settings',
-    );
-    $form['element_type'] = array(
+    ];
+    $form['element_type'] = [
       '#title' => $this->t('HTML element'),
       '#options' => $this->getElements(),
       '#type' => 'select',
       '#default_value' => $this->options['element_type'],
       '#description' => $this->t('Choose the HTML element to wrap around this field, e.g. H1, H2, etc.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_type_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_type_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'style_settings',
-    );
+    ];
 
-    $form['element_class_enable'] = array(
+    $form['element_class_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Create a CSS class'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_type_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_type_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#default_value' => !empty($this->options['element_class']) || (string) $this->options['element_class'] == '0',
       '#fieldset' => 'style_settings',
-    );
-    $form['element_class'] = array(
+    ];
+    $form['element_class'] = [
       '#title' => $this->t('CSS class'),
       '#description' => $this->t('You may use token substitutions from the rewriting section in this class.'),
       '#type' => 'textfield',
       '#default_value' => $this->options['element_class'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_type_enable]"]' => array('checked' => TRUE),
-          ':input[name="options[element_class_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_type_enable]"]' => ['checked' => TRUE],
+          ':input[name="options[element_class_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'style_settings',
-    );
+    ];
 
-    $form['element_label_type_enable'] = array(
+    $form['element_label_type_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Customize label HTML'),
       '#default_value' => !empty($this->options['element_label_type']) || (string) $this->options['element_label_type'] == '0' || !empty($this->options['element_label_class']) || (string) $this->options['element_label_class'] == '0',
       '#fieldset' => 'style_settings',
-    );
-    $form['element_label_type'] = array(
+    ];
+    $form['element_label_type'] = [
       '#title' => $this->t('Label HTML element'),
       '#options' => $this->getElements(FALSE),
       '#type' => 'select',
       '#default_value' => $this->options['element_label_type'],
       '#description' => $this->t('Choose the HTML element to wrap around this label, e.g. H1, H2, etc.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_label_type_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_label_type_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'style_settings',
-    );
-    $form['element_label_class_enable'] = array(
+    ];
+    $form['element_label_class_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Create a CSS class'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_label_type_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_label_type_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#default_value' => !empty($this->options['element_label_class']) || (string) $this->options['element_label_class'] == '0',
       '#fieldset' => 'style_settings',
-    );
-    $form['element_label_class'] = array(
+    ];
+    $form['element_label_class'] = [
       '#title' => $this->t('CSS class'),
       '#description' => $this->t('You may use token substitutions from the rewriting section in this class.'),
       '#type' => 'textfield',
       '#default_value' => $this->options['element_label_class'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_label_type_enable]"]' => array('checked' => TRUE),
-          ':input[name="options[element_label_class_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_label_type_enable]"]' => ['checked' => TRUE],
+          ':input[name="options[element_label_class_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'style_settings',
-    );
+    ];
 
-    $form['element_wrapper_type_enable'] = array(
+    $form['element_wrapper_type_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Customize field and label wrapper HTML'),
       '#default_value' => !empty($this->options['element_wrapper_type']) || (string) $this->options['element_wrapper_type'] == '0' || !empty($this->options['element_wrapper_class']) || (string) $this->options['element_wrapper_class'] == '0',
       '#fieldset' => 'style_settings',
-    );
-    $form['element_wrapper_type'] = array(
+    ];
+    $form['element_wrapper_type'] = [
       '#title' => $this->t('Wrapper HTML element'),
       '#options' => $this->getElements(FALSE),
       '#type' => 'select',
       '#default_value' => $this->options['element_wrapper_type'],
       '#description' => $this->t('Choose the HTML element to wrap around this field and label, e.g. H1, H2, etc. This may not be used if the field and label are not rendered together, such as with a table.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_wrapper_type_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_wrapper_type_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'style_settings',
-    );
+    ];
 
-    $form['element_wrapper_class_enable'] = array(
+    $form['element_wrapper_class_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Create a CSS class'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_wrapper_type_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_wrapper_type_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#default_value' => !empty($this->options['element_wrapper_class']) || (string) $this->options['element_wrapper_class'] == '0',
       '#fieldset' => 'style_settings',
-    );
-    $form['element_wrapper_class'] = array(
+    ];
+    $form['element_wrapper_class'] = [
       '#title' => $this->t('CSS class'),
       '#description' => $this->t('You may use token substitutions from the rewriting section in this class.'),
       '#type' => 'textfield',
       '#default_value' => $this->options['element_wrapper_class'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[element_wrapper_class_enable]"]' => array('checked' => TRUE),
-          ':input[name="options[element_wrapper_type_enable]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="options[element_wrapper_class_enable]"]' => ['checked' => TRUE],
+          ':input[name="options[element_wrapper_type_enable]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#fieldset' => 'style_settings',
-    );
+    ];
 
-    $form['element_default_classes'] = array(
+    $form['element_default_classes'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Add default classes'),
       '#default_value' => $this->options['element_default_classes'],
       '#description' => $this->t('Use default Views classes to identify the field, field label and field content.'),
       '#fieldset' => 'style_settings',
-    );
+    ];
 
-    $form['alter'] = array(
+    $form['alter'] = [
       '#title' => $this->t('Rewrite results'),
       '#type' => 'details',
       '#weight' => 100,
-    );
+    ];
 
     if ($this->allowAdvancedRender()) {
       $form['alter']['#tree'] = TRUE;
-      $form['alter']['alter_text'] = array(
+      $form['alter']['alter_text'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Override the output of this field with custom text'),
         '#default_value' => $this->options['alter']['alter_text'],
-      );
+      ];
 
-      $form['alter']['text'] = array(
+      $form['alter']['text'] = [
         '#title' => $this->t('Text'),
         '#type' => 'textarea',
         '#default_value' => $this->options['alter']['text'],
-        '#description' => $this->t('The text to display for this field. You may include HTML or <a href=":url">Twig</a>. You may enter data from this view as per the "Replacement patterns" below.', array(':url' => CoreUrl::fromUri('http://twig.sensiolabs.org/documentation')->toString())),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][alter_text]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-
-      $form['alter']['make_link'] = array(
+        '#description' => $this->t('The text to display for this field. You may include HTML or <a href=":url">Twig</a>. You may enter data from this view as per the "Replacement patterns" below.', [':url' => CoreUrl::fromUri('http://twig.sensiolabs.org/documentation')->toString()]),
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][alter_text]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+
+      $form['alter']['make_link'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Output this field as a custom link'),
         '#default_value' => $this->options['alter']['make_link'],
-      );
-      $form['alter']['path'] = array(
+      ];
+      $form['alter']['path'] = [
         '#title' => $this->t('Link path'),
         '#type' => 'textfield',
         '#default_value' => $this->options['alter']['path'],
         '#description' => $this->t('The Drupal path or absolute URL for this link. You may enter data from this view as per the "Replacement patterns" below.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
         '#maxlength' => 255,
-      );
-      $form['alter']['absolute'] = array(
+      ];
+      $form['alter']['absolute'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Use absolute path'),
         '#default_value' => $this->options['alter']['absolute'],
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['replace_spaces'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['replace_spaces'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Replace spaces with dashes'),
         '#default_value' => $this->options['alter']['replace_spaces'],
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['external'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['external'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('External server URL'),
         '#default_value' => $this->options['alter']['external'],
         '#description' => $this->t("Links to an external server using a full URL: e.g. 'http://www.example.com' or 'www.example.com'."),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['path_case'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['path_case'] = [
         '#type' => 'select',
         '#title' => $this->t('Transform the case'),
         '#description' => $this->t('When printing URL paths, how to transform the case of the filter value.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-       '#options' => array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+       '#options' => [
           'none' => $this->t('No transform'),
           'upper' => $this->t('Upper case'),
           'lower' => $this->t('Lower case'),
           'ucfirst' => $this->t('Capitalize first letter'),
           'ucwords' => $this->t('Capitalize each word'),
-        ),
+        ],
         '#default_value' => $this->options['alter']['path_case'],
-      );
-      $form['alter']['link_class'] = array(
+      ];
+      $form['alter']['link_class'] = [
         '#title' => $this->t('Link class'),
         '#type' => 'textfield',
         '#default_value' => $this->options['alter']['link_class'],
         '#description' => $this->t('The CSS class to apply to the link.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['alt'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['alt'] = [
         '#title' => $this->t('Title text'),
         '#type' => 'textfield',
         '#default_value' => $this->options['alter']['alt'],
         '#description' => $this->t('Text to place as "title" text which most browsers display as a tooltip when hovering over the link.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['rel'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['rel'] = [
         '#title' => $this->t('Rel Text'),
         '#type' => 'textfield',
         '#default_value' => $this->options['alter']['rel'],
         '#description' => $this->t('Include Rel attribute for use in lightbox2 or other javascript utility.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['prefix'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['prefix'] = [
         '#title' => $this->t('Prefix text'),
         '#type' => 'textfield',
         '#default_value' => $this->options['alter']['prefix'],
         '#description' => $this->t('Any text to display before this link. You may include HTML.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['suffix'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['suffix'] = [
         '#title' => $this->t('Suffix text'),
         '#type' => 'textfield',
         '#default_value' => $this->options['alter']['suffix'],
         '#description' => $this->t('Any text to display after this link. You may include HTML.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['target'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['target'] = [
         '#title' => $this->t('Target'),
         '#type' => 'textfield',
         '#default_value' => $this->options['alter']['target'],
         '#description' => $this->t("Target of the link, such as _blank, _parent or an iframe's name. This field is rarely used."),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
 
 
       // Get a list of the available fields and arguments for token replacement.
@@ -871,8 +871,8 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       $options[$optgroup_fields]["{{ {$this->options['id']} }}"] = substr(strrchr($this->adminLabel(), ":"), 2 );
 
       foreach ($this->view->display_handler->getHandlers('argument') as $arg => $handler) {
-        $options[$optgroup_arguments]["{{ arguments.$arg }}"] = $this->t('@argument title', array('@argument' => $handler->adminLabel()));
-        $options[$optgroup_arguments]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', array('@argument' => $handler->adminLabel()));
+        $options[$optgroup_arguments]["{{ arguments.$arg }}"] = $this->t('@argument title', ['@argument' => $handler->adminLabel()]);
+        $options[$optgroup_arguments]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', ['@argument' => $handler->adminLabel()]);
       }
 
       $this->documentSelfTokens($options[$optgroup_fields]);
@@ -890,14 +890,14 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         ];
         foreach (array_keys($options) as $type) {
           if (!empty($options[$type])) {
-            $items = array();
+            $items = [];
             foreach ($options[$type] as $key => $value) {
               $items[] = $key . ' == ' . $value;
             }
-            $item_list = array(
+            $item_list = [
               '#theme' => 'item_list',
               '#items' => $items,
-            );
+            ];
             $output[] = $item_list;
           }
         }
@@ -906,181 +906,181 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       // run. It also has an extra div because the dependency wants to hide
       // the parent in situations like this, so we need a second div to
       // make this work.
-      $form['alter']['help'] = array(
+      $form['alter']['help'] = [
         '#type' => 'details',
         '#title' => $this->t('Replacement patterns'),
         '#value' => $output,
-        '#states' => array(
-          'visible' => array(
-            array(
-              ':input[name="options[alter][make_link]"]' => array('checked' => TRUE),
-            ),
-            array(
-              ':input[name="options[alter][alter_text]"]' => array('checked' => TRUE),
-            ),
-            array(
-              ':input[name="options[alter][more_link]"]' => array('checked' => TRUE),
-            ),
-          ),
-        ),
-      );
-
-      $form['alter']['trim'] = array(
+        '#states' => [
+          'visible' => [
+            [
+              ':input[name="options[alter][make_link]"]' => ['checked' => TRUE],
+            ],
+            [
+              ':input[name="options[alter][alter_text]"]' => ['checked' => TRUE],
+            ],
+            [
+              ':input[name="options[alter][more_link]"]' => ['checked' => TRUE],
+            ],
+          ],
+        ],
+      ];
+
+      $form['alter']['trim'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Trim this field to a maximum number of characters'),
         '#default_value' => $this->options['alter']['trim'],
-      );
+      ];
 
-      $form['alter']['max_length'] = array(
+      $form['alter']['max_length'] = [
         '#title' => $this->t('Maximum number of characters'),
         '#type' => 'textfield',
         '#default_value' => $this->options['alter']['max_length'],
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][trim]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-
-      $form['alter']['word_boundary'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][trim]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+
+      $form['alter']['word_boundary'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Trim only on a word boundary'),
         '#description' => $this->t('If checked, this field be trimmed only on a word boundary. This is guaranteed to be the maximum characters stated or less. If there are no word boundaries this could trim a field to nothing.'),
         '#default_value' => $this->options['alter']['word_boundary'],
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][trim]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-
-      $form['alter']['ellipsis'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][trim]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+
+      $form['alter']['ellipsis'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Add "…" at the end of trimmed text'),
         '#default_value' => $this->options['alter']['ellipsis'],
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][trim]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-
-      $form['alter']['more_link'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][trim]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+
+      $form['alter']['more_link'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Add a read-more link if output is trimmed'),
         '#default_value' => $this->options['alter']['more_link'],
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][trim]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-
-      $form['alter']['more_link_text'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][trim]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+
+      $form['alter']['more_link_text'] = [
         '#type' => 'textfield',
         '#title' => $this->t('More link label'),
         '#default_value' => $this->options['alter']['more_link_text'],
         '#description' => $this->t('You may use the "Replacement patterns" above.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][trim]"]' => array('checked' => TRUE),
-            ':input[name="options[alter][more_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-      $form['alter']['more_link_path'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][trim]"]' => ['checked' => TRUE],
+            ':input[name="options[alter][more_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+      $form['alter']['more_link_path'] = [
         '#type' => 'textfield',
         '#title' => $this->t('More link path'),
         '#default_value' => $this->options['alter']['more_link_path'],
         '#description' => $this->t('This can be an internal Drupal path such as node/add or an external URL such as "https://www.drupal.org". You may use the "Replacement patterns" above.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][trim]"]' => array('checked' => TRUE),
-            ':input[name="options[alter][more_link]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-
-      $form['alter']['html'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][trim]"]' => ['checked' => TRUE],
+            ':input[name="options[alter][more_link]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+
+      $form['alter']['html'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Field can contain HTML'),
         '#description' => $this->t('An HTML corrector will be run to ensure HTML tags are properly closed after trimming.'),
         '#default_value' => $this->options['alter']['html'],
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][trim]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-
-      $form['alter']['strip_tags'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][trim]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+
+      $form['alter']['strip_tags'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Strip HTML tags'),
         '#default_value' => $this->options['alter']['strip_tags'],
-      );
+      ];
 
-      $form['alter']['preserve_tags'] = array(
+      $form['alter']['preserve_tags'] = [
         '#type' => 'textfield',
         '#title' => $this->t('Preserve certain tags'),
         '#description' => $this->t('List the tags that need to be preserved during the stripping process. example &quot;&lt;p&gt; &lt;br&gt;&quot; which will preserve all p and br elements'),
         '#default_value' => $this->options['alter']['preserve_tags'],
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[alter][strip_tags]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
-
-      $form['alter']['trim_whitespace'] = array(
+        '#states' => [
+          'visible' => [
+            ':input[name="options[alter][strip_tags]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
+
+      $form['alter']['trim_whitespace'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Remove whitespace'),
         '#default_value' => $this->options['alter']['trim_whitespace'],
-      );
+      ];
 
-      $form['alter']['nl2br'] = array(
+      $form['alter']['nl2br'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Convert newlines to HTML &lt;br&gt; tags'),
         '#default_value' => $this->options['alter']['nl2br'],
-      );
+      ];
     }
 
-    $form['empty_field_behavior'] = array(
+    $form['empty_field_behavior'] = [
       '#type' => 'details',
       '#title' => $this->t('No results behavior'),
       '#weight' => 100,
-    );
+    ];
 
-    $form['empty'] = array(
+    $form['empty'] = [
       '#type' => 'textarea',
       '#title' => $this->t('No results text'),
       '#default_value' => $this->options['empty'],
       '#description' => $this->t('Provide text to display if this field contains an empty result. You may include HTML. You may enter data from this view as per the "Replacement patterns" in the "Rewrite Results" section below.'),
       '#fieldset' => 'empty_field_behavior',
-    );
+    ];
 
-    $form['empty_zero'] = array(
+    $form['empty_zero'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Count the number 0 as empty'),
       '#default_value' => $this->options['empty_zero'],
       '#description' => $this->t('Enable to display the "no results text" if the field contains the number 0.'),
       '#fieldset' => 'empty_field_behavior',
-    );
+    ];
 
-    $form['hide_empty'] = array(
+    $form['hide_empty'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Hide if empty'),
       '#default_value' => $this->options['hide_empty'],
       '#description' => $this->t('Enable to hide this field if it is empty. Note that the field label or rewritten output may still be displayed. To hide labels, check the style or row style settings for empty fields. To hide rewritten content, check the "Hide rewriting if empty" checkbox.'),
       '#fieldset' => 'empty_field_behavior',
-    );
+    ];
 
-    $form['hide_alter_empty'] = array(
+    $form['hide_alter_empty'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Hide rewriting if empty'),
       '#default_value' => $this->options['hide_alter_empty'],
       '#description' => $this->t('Do not display rewritten content if this field is empty.'),
       '#fieldset' => 'empty_field_behavior',
-    );
+    ];
   }
 
   /**
@@ -1152,7 +1152,7 @@ public function advancedRender(ResultRow $values) {
     if ($this->allowAdvancedRender()) {
       $tokens = NULL;
       if ($this instanceof MultiItemsFieldHandlerInterface) {
-        $items = array();
+        $items = [];
         foreach ($raw_items as $count => $item) {
           $value = $this->render_item($count, $item);
           if (is_array($value)) {
@@ -1169,7 +1169,7 @@ public function advancedRender(ResultRow $values) {
         $value = $this->renderItems($items);
       }
       else {
-        $alter = array('phase' => static::RENDER_TEXT_PHASE_COMPLETELY) + $this->options['alter'];
+        $alter = ['phase' => static::RENDER_TEXT_PHASE_COMPLETELY] + $this->options['alter'];
         $value = $this->renderText($alter);
       }
 
@@ -1291,13 +1291,13 @@ public function renderText($alter) {
 
         // @todo Views should expect and store a leading /. See
         //   https://www.drupal.org/node/2423913.
-        $options = array(
-          'attributes' => array(
-            'class' => array(
+        $options = [
+          'attributes' => [
+            'class' => [
               'views-more-link',
-            ),
-          ),
-        );
+            ],
+          ],
+        ];
         if (UrlHelper::isExternal($more_link_path)) {
           $more_link_url = CoreUrl::fromUri($more_link_path, $options);
         }
@@ -1375,7 +1375,7 @@ protected function renderTrimText($alter, $value) {
    * the user.
    */
   protected function renderAsLink($alter, $text, $tokens) {
-    $options = array(
+    $options = [
       'absolute' => !empty($alter['absolute']) ? TRUE : FALSE,
       'alias' => FALSE,
       'entity' => NULL,
@@ -1383,7 +1383,7 @@ protected function renderAsLink($alter, $text, $tokens) {
       'fragment' => NULL,
       'language' => NULL,
       'query' => [],
-    );
+    ];
 
     $alter += [
       'path' => NULL
@@ -1488,7 +1488,7 @@ protected function renderAsLink($alter, $text, $tokens) {
     }
 
     if (isset($url['fragment'])) {
-      $path = strtr($path, array('#' . $url['fragment'] => ''));
+      $path = strtr($path, ['#' . $url['fragment'] => '']);
       // If the path is empty we want to have a fragment for the current site.
       if ($path == '') {
         $options['external'] = TRUE;
@@ -1504,7 +1504,7 @@ protected function renderAsLink($alter, $text, $tokens) {
 
     $class = $this->viewsTokenReplace($alter['link_class'], $tokens);
     if ($class) {
-      $options['attributes']['class'] = array($class);
+      $options['attributes']['class'] = [$class];
     }
 
     if (!empty($alter['rel']) && $rel = $this->viewsTokenReplace($alter['rel'], $tokens)) {
@@ -1534,7 +1534,7 @@ protected function renderAsLink($alter, $text, $tokens) {
       // \Drupal\Core\Utility\LinkGeneratorInterface::generate().
       $options['query'] = UrlHelper::buildQuery($alter['query']);
       $options['query'] = $this->viewsTokenReplace($options['query'], $tokens);
-      $query = array();
+      $query = [];
       parse_str($options['query'], $query);
       $options['query'] = $query;
     }
@@ -1582,7 +1582,7 @@ protected function renderAsLink($alter, $text, $tokens) {
    * {@inheritdoc}
    */
   public function getRenderTokens($item) {
-    $tokens = array();
+    $tokens = [];
     if (!empty($this->view->build_info['substitutions'])) {
       $tokens = $this->view->build_info['substitutions'];
     }
@@ -1677,8 +1677,8 @@ protected function getFieldTokenPlaceholder() {
    * @return
    *   An array of available tokens, with nested keys representative of the array structure.
    */
-  protected function getTokenValuesRecursive(array $array, array $parent_keys = array()) {
-    $tokens = array();
+  protected function getTokenValuesRecursive(array $array, array $parent_keys = []) {
+    $tokens = [];
 
     foreach ($array as $param => $val) {
       if (is_array($val)) {
@@ -1727,12 +1727,12 @@ protected function documentSelfTokens(&$tokens) { }
    */
   function theme(ResultRow $values) {
     $renderer = $this->getRenderer();
-    $build = array(
+    $build = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#field' => $this,
       '#row' => $values,
-    );
+    ];
     $output = $renderer->render($build);
 
     // Set the bubbleable rendering metadata on $view->element. This ensures the
@@ -1744,7 +1744,7 @@ function theme(ResultRow $values) {
   }
 
   public function themeFunctions() {
-    $themes = array();
+    $themes = [];
     $hook = 'views_view_field';
 
     $display = $this->view->display_handler->display;
diff --git a/core/modules/views/src/Plugin/views/field/FileSize.php b/core/modules/views/src/Plugin/views/field/FileSize.php
index af184d3e11d885430d7b3812efcdd8d4e18e2fa8..c8a0b95681b7b83be5a728050d125d66cc4be4a2 100644
--- a/core/modules/views/src/Plugin/views/field/FileSize.php
+++ b/core/modules/views/src/Plugin/views/field/FileSize.php
@@ -20,7 +20,7 @@ class FileSize extends FieldPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['file_size_display'] = array('default' => 'formatted');
+    $options['file_size_display'] = ['default' => 'formatted'];
 
     return $options;
   }
@@ -30,14 +30,14 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['file_size_display'] = array(
+    $form['file_size_display'] = [
       '#title' => $this->t('File size display'),
       '#type' => 'select',
-      '#options' => array(
+      '#options' => [
         'formatted' => $this->t('Formatted (in KB or MB)'),
         'bytes' => $this->t('Raw bytes'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/field/LanguageField.php b/core/modules/views/src/Plugin/views/field/LanguageField.php
index f51f2fbbaaeffe462ff04452b1a710eba73aa87f..53e2c84e1616894781835126325ccdde8c25d3b7 100644
--- a/core/modules/views/src/Plugin/views/field/LanguageField.php
+++ b/core/modules/views/src/Plugin/views/field/LanguageField.php
@@ -19,7 +19,7 @@ class LanguageField extends FieldPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['native_language'] = array('default' => FALSE);
+    $options['native_language'] = ['default' => FALSE];
 
     return $options;
   }
@@ -29,11 +29,11 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['native_language'] = array(
+    $form['native_language'] = [
       '#title' => $this->t('Display in native language'),
       '#type' => 'checkbox',
       '#default_value' => $this->options['native_language'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/field/LinkBase.php b/core/modules/views/src/Plugin/views/field/LinkBase.php
index ebe1e9d0cb10a21d14d7b9bf1c54e6fd26ba023b..31dca4c7c3c795682c5ef02c1b746a308639d743 100644
--- a/core/modules/views/src/Plugin/views/field/LinkBase.php
+++ b/core/modules/views/src/Plugin/views/field/LinkBase.php
@@ -82,7 +82,7 @@ protected function currentUser() {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['text'] = array('default' => $this->getDefaultLabel());
+    $options['text'] = ['default' => $this->getDefaultLabel()];
     return $options;
   }
 
diff --git a/core/modules/views/src/Plugin/views/field/Links.php b/core/modules/views/src/Plugin/views/field/Links.php
index 6f1695721f7863b9139eba1a8ea58c99baa3dba6..4e731a9af57473b3f4702c4f3313d52bf8b914ee 100644
--- a/core/modules/views/src/Plugin/views/field/Links.php
+++ b/core/modules/views/src/Plugin/views/field/Links.php
@@ -26,8 +26,8 @@ public function usesGroupBy() {
   public function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['fields'] = array('default' => array());
-    $options['destination'] = array('default' => TRUE);
+    $options['fields'] = ['default' => []];
+    $options['destination'] = ['default' => TRUE];
 
     return $options;
   }
@@ -39,19 +39,19 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
     // Only show fields that precede this one.
     $field_options = $this->getPreviousFieldLabels();
-    $form['fields'] = array(
+    $form['fields'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Fields'),
       '#description' => $this->t('Fields to be included as links.'),
       '#options' => $field_options,
       '#default_value' => $this->options['fields'],
-    );
-    $form['destination'] = array(
+    ];
+    $form['destination'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Include destination'),
       '#description' => $this->t('Include a "destination" parameter in the link to return the user to the original view upon completing the link action.'),
       '#default_value' => $this->options['destination'],
-    );
+    ];
   }
 
   /**
@@ -61,7 +61,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    *   The links which are used by the render function.
    */
   protected function getLinks() {
-    $links = array();
+    $links = [];
     foreach ($this->options['fields'] as $field) {
       if (empty($this->view->field[$field]->last_render_text)) {
         continue;
@@ -76,13 +76,13 @@ protected function getLinks() {
         $url = $this->view->field[$field]->options['alter']['url'];
       }
       // Make sure that tokens are replaced for this paths as well.
-      $tokens = $this->getRenderTokens(array());
+      $tokens = $this->getRenderTokens([]);
       $path = strip_tags(Html::decodeEntities($this->viewsTokenReplace($path, $tokens)));
 
-      $links[$field] = array(
+      $links[$field] = [
         'url' => $path ? UrlObject::fromUri('internal:/' . $path) : $url,
         'title' => $title,
-      );
+      ];
       if (!empty($this->options['destination'])) {
         $links[$field]['query'] = \Drupal::destination()->getAsArray();
       }
diff --git a/core/modules/views/src/Plugin/views/field/MachineName.php b/core/modules/views/src/Plugin/views/field/MachineName.php
index feba80e6331ce12a17f08b92fb8f0a6476d79bf8..ea6a0c4be1fdf223d07c7325e31ba6b866375d21 100644
--- a/core/modules/views/src/Plugin/views/field/MachineName.php
+++ b/core/modules/views/src/Plugin/views/field/MachineName.php
@@ -36,7 +36,7 @@ public function getValueOptions() {
       }
     }
     else {
-      $this->valueOptions = array();
+      $this->valueOptions = [];
     }
   }
 
@@ -45,7 +45,7 @@ public function getValueOptions() {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['machine_name'] = array('default' => FALSE);
+    $options['machine_name'] = ['default' => FALSE];
 
     return $options;
   }
@@ -56,12 +56,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['machine_name'] = array(
+    $form['machine_name'] = [
       '#title' => $this->t('Output machine name'),
       '#description' => $this->t('Display field as machine name.'),
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['machine_name']),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/field/Markup.php b/core/modules/views/src/Plugin/views/field/Markup.php
index 7ca789f646499ef0acb43f10146ac8df08a83b4a..883bd56fb08bc358ad50c404c44d653857471fac 100644
--- a/core/modules/views/src/Plugin/views/field/Markup.php
+++ b/core/modules/views/src/Plugin/views/field/Markup.php
@@ -29,7 +29,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
     $this->format = $this->definition['format'];
 
-    $this->additional_fields = array();
+    $this->additional_fields = [];
     if (is_array($this->format)) {
       $this->additional_fields['format'] = $this->format;
     }
diff --git a/core/modules/views/src/Plugin/views/field/NumericField.php b/core/modules/views/src/Plugin/views/field/NumericField.php
index 0cf4c889b66e13df6262976c7e445db42540af12..8b6a209125d2648906a6129ce2b3a41b8cf9de67 100644
--- a/core/modules/views/src/Plugin/views/field/NumericField.php
+++ b/core/modules/views/src/Plugin/views/field/NumericField.php
@@ -25,14 +25,14 @@ class NumericField extends FieldPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['set_precision'] = array('default' => FALSE);
-    $options['precision'] = array('default' => 0);
-    $options['decimal'] = array('default' => '.');
-    $options['separator'] = array('default' => ',');
-    $options['format_plural'] = array('default' => FALSE);
-    $options['format_plural_string'] = array('default' => '1' . LOCALE_PLURAL_DELIMITER . '@count');
-    $options['prefix'] = array('default' => '');
-    $options['suffix'] = array('default' => '');
+    $options['set_precision'] = ['default' => FALSE];
+    $options['precision'] = ['default' => 0];
+    $options['decimal'] = ['default' => '.'];
+    $options['separator'] = ['default' => ','];
+    $options['format_plural'] = ['default' => FALSE];
+    $options['format_plural_string'] = ['default' => '1' . LOCALE_PLURAL_DELIMITER . '@count'];
+    $options['prefix'] = ['default' => ''];
+    $options['suffix'] = ['default' => ''];
 
     return $options;
   }
@@ -42,72 +42,72 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     if (!empty($this->definition['float'])) {
-      $form['set_precision'] = array(
+      $form['set_precision'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Round'),
         '#description' => $this->t('If checked, the number will be rounded.'),
         '#default_value' => $this->options['set_precision'],
-      );
-      $form['precision'] = array(
+      ];
+      $form['precision'] = [
         '#type' => 'textfield',
         '#title' => $this->t('Precision'),
         '#default_value' => $this->options['precision'],
         '#description' => $this->t('Specify how many digits to print after the decimal point.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[set_precision]"]' => array('checked' => TRUE),
-          ),
-        ),
+        '#states' => [
+          'visible' => [
+            ':input[name="options[set_precision]"]' => ['checked' => TRUE],
+          ],
+        ],
         '#size' => 2,
-      );
-      $form['decimal'] = array(
+      ];
+      $form['decimal'] = [
         '#type' => 'textfield',
         '#title' => $this->t('Decimal point'),
         '#default_value' => $this->options['decimal'],
         '#description' => $this->t('What single character to use as a decimal point.'),
         '#size' => 2,
-      );
+      ];
     }
-    $form['separator'] = array(
+    $form['separator'] = [
       '#type' => 'select',
       '#title' => $this->t('Thousands marker'),
-      '#options' => array(
+      '#options' => [
         '' => $this->t('- None -'),
         ',' => $this->t('Comma'),
         ' ' => $this->t('Space'),
         '.' => $this->t('Decimal'),
         '\'' => $this->t('Apostrophe'),
-      ),
+      ],
       '#default_value' => $this->options['separator'],
       '#description' => $this->t('What single character to use as the thousands separator.'),
       '#size' => 2,
-    );
-    $form['format_plural'] = array(
+    ];
+    $form['format_plural'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Format plural'),
       '#description' => $this->t('If checked, special handling will be used for plurality.'),
       '#default_value' => $this->options['format_plural'],
-    );
-    $form['format_plural_string'] = array(
+    ];
+    $form['format_plural_string'] = [
       '#type' => 'value',
       '#default_value' => $this->options['format_plural_string'],
-    );
+    ];
 
     $plural_array = explode(LOCALE_PLURAL_DELIMITER, $this->options['format_plural_string']);
     $plurals = $this->getNumberOfPlurals($this->view->storage->get('langcode'));
     for ($i = 0; $i < $plurals; $i++) {
-      $form['format_plural_values'][$i] = array(
+      $form['format_plural_values'][$i] = [
         '#type' => 'textfield',
         // @todo Should use better labels https://www.drupal.org/node/2499639
         '#title' => ($i == 0 ? $this->t('Singular form') : $this->formatPlural($i, 'First plural form', '@count. plural form')),
         '#default_value' => isset($plural_array[$i]) ? $plural_array[$i] : '',
         '#description' => $this->t('Text to use for this variant, @count will be replaced with the value.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[format_plural]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
+        '#states' => [
+          'visible' => [
+            ':input[name="options[format_plural]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
     }
     if ($plurals == 2) {
       // Simplify interface text for the most common case.
@@ -116,18 +116,18 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       $form['format_plural_values'][1]['#description'] = $this->t('Text to use for the plural form, @count will be replaced with the value.');
     }
 
-    $form['prefix'] = array(
+    $form['prefix'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Prefix'),
       '#default_value' => $this->options['prefix'],
       '#description' => $this->t('Text to put before the number, such as currency symbol.'),
-    );
-    $form['suffix'] = array(
+    ];
+    $form['suffix'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Suffix'),
       '#default_value' => $this->options['suffix'],
       '#description' => $this->t('Text to put after the number, such as currency symbol.'),
-    );
+    ];
 
     parent::buildOptionsForm($form, $form_state);
   }
diff --git a/core/modules/views/src/Plugin/views/field/PrerenderList.php b/core/modules/views/src/Plugin/views/field/PrerenderList.php
index aa8f75207e42de9ac92c7f838f28ea28db1ebff1..f851cbb6a005ed59d1382efc0280213d80cb847d 100644
--- a/core/modules/views/src/Plugin/views/field/PrerenderList.php
+++ b/core/modules/views/src/Plugin/views/field/PrerenderList.php
@@ -25,7 +25,7 @@ abstract class PrerenderList extends FieldPluginBase implements MultiItemsFieldH
    *
    * @var array
    */
-  public $items = array();
+  public $items = [];
 
   /**
    * {@inheritdoc}
@@ -33,8 +33,8 @@ abstract class PrerenderList extends FieldPluginBase implements MultiItemsFieldH
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['type'] = array('default' => 'separator');
-    $options['separator'] = array('default' => ', ');
+    $options['type'] = ['default' => 'separator'];
+    $options['separator'] = ['default' => ', '];
 
     return $options;
   }
@@ -43,27 +43,27 @@ protected function defineOptions() {
    * {@inheritdoc}
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['type'] = array(
+    $form['type'] = [
       '#type' => 'radios',
       '#title' => $this->t('Display type'),
-      '#options' => array(
+      '#options' => [
         'ul' => $this->t('Unordered list'),
         'ol' => $this->t('Ordered list'),
         'separator' => $this->t('Simple separator'),
-      ),
+      ],
       '#default_value' => $this->options['type'],
-    );
+    ];
 
-    $form['separator'] = array(
+    $form['separator'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Separator'),
       '#default_value' => $this->options['separator'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[type]"]' => array('value' => 'separator'),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="options[type]"]' => ['value' => 'separator'],
+        ],
+      ],
+    ];
     parent::buildOptionsForm($form, $form_state);
   }
 
@@ -83,12 +83,12 @@ public function renderItems($items) {
         ];
       }
       else {
-        $render = array(
+        $render = [
           '#theme' => 'item_list',
           '#items' => $items,
           '#title' => NULL,
           '#list_type' => $this->options['type'],
-        );
+        ];
       }
       return drupal_render($render);
     }
@@ -110,7 +110,7 @@ public function getItems(ResultRow $values) {
       return $this->items[$field];
     }
 
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/field/Serialized.php b/core/modules/views/src/Plugin/views/field/Serialized.php
index 3df1cca7b94d914a5c0432ccc9233f409d592621..4d74a4f1ae8b5ab137507ebdf2fa7786e70d805f 100644
--- a/core/modules/views/src/Plugin/views/field/Serialized.php
+++ b/core/modules/views/src/Plugin/views/field/Serialized.php
@@ -19,8 +19,8 @@ class Serialized extends FieldPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['format'] = array('default' => 'unserialized');
-    $options['key'] = array('default' => '');
+    $options['format'] = ['default' => 'unserialized'];
+    $options['key'] = ['default' => ''];
     return $options;
   }
 
@@ -30,27 +30,27 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['format'] = array(
+    $form['format'] = [
       '#type' => 'select',
       '#title' => $this->t('Display format'),
       '#description' => $this->t('How should the serialized data be displayed. You can choose a custom array/object key or a print_r on the full output.'),
-      '#options' => array(
+      '#options' => [
         'unserialized' => $this->t('Full data (unserialized)'),
         'serialized' => $this->t('Full data (serialized)'),
         'key' => $this->t('A certain key'),
-      ),
+      ],
       '#default_value' => $this->options['format'],
-    );
-    $form['key'] = array(
+    ];
+    $form['key'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Which key should be displayed'),
       '#default_value' => $this->options['key'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[format]"]' => array('value' => 'key'),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="options[format]"]' => ['value' => 'key'],
+        ],
+      ],
+    ];
   }
 
   /**
@@ -58,7 +58,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    */
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
     // Require a key if the format is key.
-    if ($form_state->getValue(array('options', 'format')) == 'key' && $form_state->getValue(array('options', 'key')) == '') {
+    if ($form_state->getValue(['options', 'format']) == 'key' && $form_state->getValue(['options', 'key']) == '') {
       $form_state->setError($form['key'], $this->t('You have to enter a key if you want to display a key of the data.'));
     }
   }
diff --git a/core/modules/views/src/Plugin/views/field/TimeInterval.php b/core/modules/views/src/Plugin/views/field/TimeInterval.php
index d7ec0d31927faa065ef0bbecd89605bac626726c..79cd190605a7811ebb6de76b2f846d0be01688cb 100644
--- a/core/modules/views/src/Plugin/views/field/TimeInterval.php
+++ b/core/modules/views/src/Plugin/views/field/TimeInterval.php
@@ -58,7 +58,7 @@ public static function create(ContainerInterface $container, array $configuratio
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['granularity'] = array('default' => 2);
+    $options['granularity'] = ['default' => 2];
 
     return $options;
   }
@@ -69,12 +69,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['granularity'] = array(
+    $form['granularity'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Granularity'),
       '#description' => $this->t('How many different units to display in the string.'),
       '#default_value' => $this->options['granularity'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/field/Url.php b/core/modules/views/src/Plugin/views/field/Url.php
index e847e4479b72d79a6c70901b0ba407435d4a995d..08e1fbad26c3d106e863342d6b07655ae248ace5 100644
--- a/core/modules/views/src/Plugin/views/field/Url.php
+++ b/core/modules/views/src/Plugin/views/field/Url.php
@@ -21,7 +21,7 @@ class Url extends FieldPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['display_as_link'] = array('default' => TRUE);
+    $options['display_as_link'] = ['default' => TRUE];
 
     return $options;
   }
@@ -30,11 +30,11 @@ protected function defineOptions() {
    * Provide link to the page being visited.
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['display_as_link'] = array(
+    $form['display_as_link'] = [
       '#title' => $this->t('Display as link'),
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['display_as_link']),
-    );
+    ];
     parent::buildOptionsForm($form, $form_state);
   }
 
diff --git a/core/modules/views/src/Plugin/views/filter/BooleanOperator.php b/core/modules/views/src/Plugin/views/filter/BooleanOperator.php
index 7078032e89da4afe4874ee997f23699869088c7c..69b6ebac7ebe908bd0b561b9226979e0334e7727 100644
--- a/core/modules/views/src/Plugin/views/filter/BooleanOperator.php
+++ b/core/modules/views/src/Plugin/views/filter/BooleanOperator.php
@@ -54,7 +54,7 @@ class BooleanOperator extends FilterPluginBase {
    * {@inheritdoc}
    */
   public function operatorOptions($which = 'title') {
-    $options = array();
+    $options = [];
     foreach ($this->operators() as $id => $info) {
       $options[$id] = $info[$which];
     }
@@ -68,22 +68,22 @@ public function operatorOptions($which = 'title') {
    * @return array
    */
   protected function operators() {
-    return array(
-      '=' => array(
+    return [
+      '=' => [
         'title' => $this->t('Is equal to'),
         'method' => 'queryOpBoolean',
         'short' => $this->t('='),
         'values' => 1,
         'query_operator' => static::EQUAL,
-      ),
-      '!=' => array(
+      ],
+      '!=' => [
         'title' => $this->t('Is not equal to'),
         'method' => 'queryOpBoolean',
         'short' => $this->t('!='),
         'values' => 1,
         'query_operator' => static::NOT_EQUAL,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -125,19 +125,19 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
   public function getValueOptions() {
     if (isset($this->definition['type'])) {
       if ($this->definition['type'] == 'yes-no') {
-        $this->valueOptions = array(1 => $this->t('Yes'), 0 => $this->t('No'));
+        $this->valueOptions = [1 => $this->t('Yes'), 0 => $this->t('No')];
       }
       if ($this->definition['type'] == 'on-off') {
-        $this->valueOptions = array(1 => $this->t('On'), 0 => $this->t('Off'));
+        $this->valueOptions = [1 => $this->t('On'), 0 => $this->t('Off')];
       }
       if ($this->definition['type'] == 'enabled-disabled') {
-        $this->valueOptions = array(1 => $this->t('Enabled'), 0 => $this->t('Disabled'));
+        $this->valueOptions = [1 => $this->t('Enabled'), 0 => $this->t('Disabled')];
       }
     }
 
     // Provide a fallback if the above didn't set anything.
     if (!isset($this->valueOptions)) {
-      $this->valueOptions = array(1 => $this->t('True'), 0 => $this->t('False'));
+      $this->valueOptions = [1 => $this->t('True'), 0 => $this->t('False')];
     }
   }
 
@@ -162,12 +162,12 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
       // Configuring a filter: use radios for clarity.
       $filter_form_type = 'radios';
     }
-    $form['value'] = array(
+    $form['value'] = [
       '#type' => $filter_form_type,
       '#title' => $this->value_value,
       '#options' => $this->valueOptions,
       '#default_value' => $this->value,
-    );
+    ];
     if (!empty($this->options['exposed'])) {
       $identifier = $this->options['expose']['identifier'];
       $user_input = $form_state->getUserInput();
@@ -177,13 +177,13 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
       }
       // If we're configuring an exposed filter, add an - Any - option.
       if (!$exposed || empty($this->options['expose']['required'])) {
-        $form['value']['#options'] = array('All' => $this->t('- Any -')) + $form['value']['#options'];
+        $form['value']['#options'] = ['All' => $this->t('- Any -')] + $form['value']['#options'];
       }
     }
   }
 
   protected function valueValidate($form, FormStateInterface $form_state) {
-    if ($form_state->getValue(array('options', 'value')) == 'All' && !$form_state->isValueEmpty(array('options', 'expose', 'required'))) {
+    if ($form_state->getValue(['options', 'value']) == 'All' && !$form_state->isValueEmpty(['options', 'expose', 'required'])) {
       $form_state->setErrorByName('value', $this->t('You must select a value unless this is an non-required exposed filter.'));
     }
   }
@@ -221,7 +221,7 @@ public function query() {
 
     $info = $this->operators();
     if (!empty($info[$this->operator]['method'])) {
-      call_user_func(array($this, $info[$this->operator]['method']), $field, $info[$this->operator]['query_operator']);
+      call_user_func([$this, $info[$this->operator]['method']], $field, $info[$this->operator]['query_operator']);
     }
   }
 
diff --git a/core/modules/views/src/Plugin/views/filter/Bundle.php b/core/modules/views/src/Plugin/views/filter/Bundle.php
index 1ae5eb388145c0d661d86679a67f2eb5c7198194..46142fe851f6cb70ebdd3d0abeee312b2a7466e3 100644
--- a/core/modules/views/src/Plugin/views/filter/Bundle.php
+++ b/core/modules/views/src/Plugin/views/filter/Bundle.php
@@ -94,9 +94,9 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
   public function getValueOptions() {
     if (!isset($this->valueOptions)) {
       $types = $this->bundleInfoService->getBundleInfo($this->entityTypeId);
-      $this->valueTitle = $this->t('@entity types', array('@entity' => $this->entityType->getLabel()));
+      $this->valueTitle = $this->t('@entity types', ['@entity' => $this->entityType->getLabel()]);
 
-      $options = array();
+      $options = [];
       foreach ($types as $type => $info) {
         $options[$type] = $info['label'];
       }
diff --git a/core/modules/views/src/Plugin/views/filter/Combine.php b/core/modules/views/src/Plugin/views/filter/Combine.php
index 1b4ab9c1c2421a1d556125b7f78454374faaf8f7..0396ff47ec47ce9326832d0eaf0e794ec6d324eb 100644
--- a/core/modules/views/src/Plugin/views/filter/Combine.php
+++ b/core/modules/views/src/Plugin/views/filter/Combine.php
@@ -21,7 +21,7 @@ class Combine extends StringFilter {
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['fields'] = array('default' => array());
+    $options['fields'] = ['default' => []];
 
     return $options;
   }
@@ -32,7 +32,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     // Allow to choose all fields as possible
     if ($this->view->style_plugin->usesFields()) {
-      $options = array();
+      $options = [];
       foreach ($this->view->display_handler->getHandlers('field') as $name => $field) {
         // Only allow clickSortable fields. Fields without clickSorting will
         // probably break in the Combine filter.
@@ -41,14 +41,14 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         }
       }
       if ($options) {
-        $form['fields'] = array(
+        $form['fields'] = [
           '#type' => 'select',
           '#title' => $this->t('Choose fields to combine for filtering'),
           '#description' => $this->t("This filter doesn't work for very special field handlers."),
           '#multiple' => TRUE,
           '#options' => $options,
           '#default_value' => $this->options['fields'],
-        );
+        ];
       }
       else {
         $form_state->setErrorByName('', $this->t('You have to add some fields to be able to use this filter.'));
@@ -58,7 +58,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
   public function query() {
     $this->view->_build('field');
-    $fields = array();
+    $fields = [];
     // Only add the fields if they have a proper field and table alias.
     foreach ($this->options['fields'] as $id) {
       // Overridden fields can lead to fields missing from a display that are
@@ -78,7 +78,7 @@ public function query() {
     }
     if ($fields) {
       $count = count($fields);
-      $separated_fields = array();
+      $separated_fields = [];
       foreach ($fields as $key => $field) {
         $separated_fields[] = $field;
         if ($key < $count - 1) {
@@ -106,7 +106,7 @@ public function validate() {
         if (!isset($fields[$id])) {
           // Combined field filter only works with fields that are in the field
           // settings.
-          $errors[] = $this->t('Field %field set in %filter is not set in display %display.', array('%field' => $id, '%filter' => $this->adminLabel(), '%display' => $this->displayHandler->display['display_title']));
+          $errors[] = $this->t('Field %field set in %filter is not set in display %display.', ['%field' => $id, '%filter' => $this->adminLabel(), '%display' => $this->displayHandler->display['display_title']]);
           break;
         }
         elseif (!$fields[$id]->clickSortable()) {
@@ -114,12 +114,12 @@ public function validate() {
           // is not click sortable we can assume it is not a simple field.
           // @todo change this check to isComputed. See
           // https://www.drupal.org/node/2349465
-          $errors[] = $this->t('Field %field set in %filter is not usable for this filter type. Combined field filter only works for simple fields.', array('%field' => $fields[$id]->adminLabel(), '%filter' => $this->adminLabel()));
+          $errors[] = $this->t('Field %field set in %filter is not usable for this filter type. Combined field filter only works for simple fields.', ['%field' => $fields[$id]->adminLabel(), '%filter' => $this->adminLabel()]);
         }
       }
     }
     else {
-      $errors[] = $this->t('%display: %filter can only be used on displays that use fields. Set the style or row format for that display to one using fields to use the combine field filter.', array('%display' => $this->displayHandler->display['display_title'], '%filter' => $this->adminLabel()));
+      $errors[] = $this->t('%display: %filter can only be used on displays that use fields. Set the style or row format for that display to one using fields to use the combine field filter.', ['%display' => $this->displayHandler->display['display_title'], '%filter' => $this->adminLabel()]);
     }
     return $errors;
   }
@@ -131,12 +131,12 @@ public function validate() {
   function opEqual($expression) {
     $placeholder = $this->placeholder();
     $operator = $this->operator();
-    $this->query->addWhereExpression($this->options['group'], "$expression $operator $placeholder", array($placeholder => $this->value));
+    $this->query->addWhereExpression($this->options['group'], "$expression $operator $placeholder", [$placeholder => $this->value]);
   }
 
   protected function opContains($expression) {
     $placeholder = $this->placeholder();
-    $this->query->addWhereExpression($this->options['group'], "$expression LIKE $placeholder", array($placeholder => '%' . db_like($this->value) . '%'));
+    $this->query->addWhereExpression($this->options['group'], "$expression LIKE $placeholder", [$placeholder => '%' . db_like($this->value) . '%']);
   }
 
   /**
@@ -169,38 +169,38 @@ protected function opContainsWord($expression) {
       $temp_placeholder = $placeholder . '_' . $match_key;
       // Clean up the user input and remove the sentence delimiters.
       $word = trim($match[2], ',?!();:-"');
-      $this->query->addWhereExpression($group, "$expression $operator $temp_placeholder", array($temp_placeholder => '%' . Database::getConnection()->escapeLike($word) . '%'));
+      $this->query->addWhereExpression($group, "$expression $operator $temp_placeholder", [$temp_placeholder => '%' . Database::getConnection()->escapeLike($word) . '%']);
     }
   }
 
   protected function opStartsWith($expression) {
     $placeholder = $this->placeholder();
-    $this->query->addWhereExpression($this->options['group'], "$expression LIKE $placeholder", array($placeholder => db_like($this->value) . '%'));
+    $this->query->addWhereExpression($this->options['group'], "$expression LIKE $placeholder", [$placeholder => db_like($this->value) . '%']);
   }
 
   protected function opNotStartsWith($expression) {
     $placeholder = $this->placeholder();
-    $this->query->addWhereExpression($this->options['group'], "$expression NOT LIKE $placeholder", array($placeholder => db_like($this->value) . '%'));
+    $this->query->addWhereExpression($this->options['group'], "$expression NOT LIKE $placeholder", [$placeholder => db_like($this->value) . '%']);
   }
 
   protected function opEndsWith($expression) {
     $placeholder = $this->placeholder();
-    $this->query->addWhereExpression($this->options['group'], "$expression LIKE $placeholder", array($placeholder => '%' . db_like($this->value)));
+    $this->query->addWhereExpression($this->options['group'], "$expression LIKE $placeholder", [$placeholder => '%' . db_like($this->value)]);
   }
 
   protected function opNotEndsWith($expression) {
     $placeholder = $this->placeholder();
-    $this->query->addWhereExpression($this->options['group'], "$expression NOT LIKE $placeholder", array($placeholder => '%' . db_like($this->value)));
+    $this->query->addWhereExpression($this->options['group'], "$expression NOT LIKE $placeholder", [$placeholder => '%' . db_like($this->value)]);
   }
 
   protected function opNotLike($expression) {
     $placeholder = $this->placeholder();
-    $this->query->addWhereExpression($this->options['group'], "$expression NOT LIKE $placeholder", array($placeholder => '%' . db_like($this->value) . '%'));
+    $this->query->addWhereExpression($this->options['group'], "$expression NOT LIKE $placeholder", [$placeholder => '%' . db_like($this->value) . '%']);
   }
 
   protected function opRegex($expression) {
     $placeholder = $this->placeholder();
-    $this->query->addWhereExpression($this->options['group'], "$expression REGEXP $placeholder", array($placeholder => $this->value));
+    $this->query->addWhereExpression($this->options['group'], "$expression REGEXP $placeholder", [$placeholder => $this->value]);
   }
 
   protected function opEmpty($expression) {
diff --git a/core/modules/views/src/Plugin/views/filter/Date.php b/core/modules/views/src/Plugin/views/filter/Date.php
index 84a1c421c611c162012adc4b406a2f07467e46c4..b69be2bcfc91f57f378fd20e49f7acf5923daad7 100644
--- a/core/modules/views/src/Plugin/views/filter/Date.php
+++ b/core/modules/views/src/Plugin/views/filter/Date.php
@@ -27,15 +27,15 @@ protected function defineOptions() {
    */
   protected function valueForm(&$form, FormStateInterface $form_state) {
     if (!$form_state->get('exposed')) {
-      $form['value']['type'] = array(
+      $form['value']['type'] = [
         '#type' => 'radios',
         '#title' => $this->t('Value type'),
-        '#options' => array(
+        '#options' => [
           'date' => $this->t('A date in any machine readable format. CCYY-MM-DD HH:MM:SS is preferred.'),
-          'offset' => $this->t('An offset from the current time such as "@example1" or "@example2"', array('@example1' => '+1 day', '@example2' => '-2 hours -30 minutes')),
-        ),
+          'offset' => $this->t('An offset from the current time such as "@example1" or "@example2"', ['@example1' => '+1 day', '@example2' => '-2 hours -30 minutes']),
+        ],
         '#default_value' => !empty($this->value['type']) ? $this->value['type'] : 'date',
-      );
+      ];
     }
     parent::valueForm($form, $form_state);
   }
@@ -43,12 +43,12 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
     parent::validateOptionsForm($form, $form_state);
 
-    if (!empty($this->options['exposed']) && $form_state->isValueEmpty(array('options', 'expose', 'required'))) {
+    if (!empty($this->options['exposed']) && $form_state->isValueEmpty(['options', 'expose', 'required'])) {
       // Who cares what the value is if it's exposed and non-required.
       return;
     }
 
-    $this->validateValidTime($form['value'], $form_state, $form_state->getValue(array('options', 'operator')), $form_state->getValue(array('options', 'value')));
+    $this->validateValidTime($form['value'], $form_state, $form_state->getValue(['options', 'operator']), $form_state->getValue(['options', 'value']));
   }
 
   public function validateExposed(&$form, FormStateInterface $form_state) {
diff --git a/core/modules/views/src/Plugin/views/filter/Equality.php b/core/modules/views/src/Plugin/views/filter/Equality.php
index 748c60d698c01a7a5b59ce8ec7bc9280a40b9ed0..e1d2aeb1e80ddd7a120d0688e0f9345352070e4b 100644
--- a/core/modules/views/src/Plugin/views/filter/Equality.php
+++ b/core/modules/views/src/Plugin/views/filter/Equality.php
@@ -20,22 +20,22 @@ class Equality extends FilterPluginBase {
    * Provide simple equality operator
    */
   public function operatorOptions() {
-    return array(
+    return [
       '=' => $this->t('Is equal to'),
       '!=' => $this->t('Is not equal to'),
-    );
+    ];
   }
 
   /**
    * Provide a simple textfield for equality
    */
   protected function valueForm(&$form, FormStateInterface $form_state) {
-    $form['value'] = array(
+    $form['value'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Value'),
       '#size' => 30,
       '#default_value' => $this->value,
-    );
+    ];
 
     if ($exposed = $form_state->get('exposed')) {
       $identifier = $this->options['expose']['identifier'];
diff --git a/core/modules/views/src/Plugin/views/filter/FilterPluginBase.php b/core/modules/views/src/Plugin/views/filter/FilterPluginBase.php
index 5c2a8d8c0fb3c46b034f3ea6e86649ebfcc4296d..bce17f3672025e27af433e1e224d08eb4089ed19 100644
--- a/core/modules/views/src/Plugin/views/filter/FilterPluginBase.php
+++ b/core/modules/views/src/Plugin/views/filter/FilterPluginBase.php
@@ -116,26 +116,26 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['operator'] = array('default' => '=');
-    $options['value'] = array('default' => '');
-    $options['group'] = array('default' => '1');
-    $options['exposed'] = array('default' => FALSE);
-    $options['expose'] = array(
-      'contains' => array(
-        'operator_id' => array('default' => FALSE),
-        'label' => array('default' => ''),
-        'description' => array('default' => ''),
-        'use_operator' => array('default' => FALSE),
-        'operator' => array('default' => ''),
-        'identifier' => array('default' => ''),
-        'required' => array('default' => FALSE),
-        'remember' => array('default' => FALSE),
-        'multiple' => array('default' => FALSE),
-        'remember_roles' => array('default' => array(
+    $options['operator'] = ['default' => '='];
+    $options['value'] = ['default' => ''];
+    $options['group'] = ['default' => '1'];
+    $options['exposed'] = ['default' => FALSE];
+    $options['expose'] = [
+      'contains' => [
+        'operator_id' => ['default' => FALSE],
+        'label' => ['default' => ''],
+        'description' => ['default' => ''],
+        'use_operator' => ['default' => FALSE],
+        'operator' => ['default' => ''],
+        'identifier' => ['default' => ''],
+        'required' => ['default' => FALSE],
+        'remember' => ['default' => FALSE],
+        'multiple' => ['default' => FALSE],
+        'remember_roles' => ['default' => [
           RoleInterface::AUTHENTICATED_ID => RoleInterface::AUTHENTICATED_ID,
-        )),
-      ),
-    );
+        ]],
+      ],
+    ];
 
     // A group is a combination of a filter, an operator and a value
     // operating like a single filter.
@@ -145,21 +145,21 @@ protected function defineOptions() {
     // an identifier and other settings like the widget and the label.
     // This settings are saved in another array to allow users to switch
     // between a normal filter and a group of filters with a single click.
-    $options['is_grouped'] = array('default' => FALSE);
-    $options['group_info'] = array(
-      'contains' => array(
-        'label' => array('default' => ''),
-        'description' => array('default' => ''),
-        'identifier' => array('default' => ''),
-        'optional' => array('default' => TRUE),
-        'widget' => array('default' => 'select'),
-        'multiple' => array('default' => FALSE),
-        'remember' => array('default' => 0),
-        'default_group' => array('default' => 'All'),
-        'default_group_multiple' => array('default' => array()),
-        'group_items' => array('default' => array()),
-      ),
-    );
+    $options['is_grouped'] = ['default' => FALSE];
+    $options['group_info'] = [
+      'contains' => [
+        'label' => ['default' => ''],
+        'description' => ['default' => ''],
+        'identifier' => ['default' => ''],
+        'optional' => ['default' => TRUE],
+        'widget' => ['default' => 'select'],
+        'multiple' => ['default' => FALSE],
+        'remember' => ['default' => 0],
+        'default_group' => ['default' => 'All'],
+        'default_group_multiple' => ['default' => []],
+        'group_items' => ['default' => []],
+      ],
+    ];
 
     return $options;
   }
@@ -205,19 +205,19 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     if ($this->canBuildGroup()) {
       $this->showBuildGroupButton($form, $form_state);
     }
-    $form['clear_markup_start'] = array(
+    $form['clear_markup_start'] = [
       '#markup' => '<div class="clearfix">',
-    );
+    ];
     if ($this->isAGroup()) {
       if ($this->canBuildGroup()) {
-        $form['clear_markup_start'] = array(
+        $form['clear_markup_start'] = [
           '#markup' => '<div class="clearfix">',
-        );
+        ];
         // Render the build group form.
         $this->showBuildGroupForm($form, $form_state);
-        $form['clear_markup_end'] = array(
+        $form['clear_markup_end'] = [
           '#markup' => '</div>',
-        );
+        ];
       }
     }
     else {
@@ -225,9 +225,9 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       $this->showOperatorForm($form, $form_state);
       // Add the subform from valueForm().
       $this->showValueForm($form, $form_state);
-      $form['clear_markup_end'] = array(
+      $form['clear_markup_end'] = [
         '#markup' => '</div>',
-      );
+      ];
       if ($this->canExpose()) {
         // Add the subform from buildExposeForm().
         $this->showExposeForm($form, $form_state);
@@ -289,12 +289,12 @@ public function showOperatorForm(&$form, FormStateInterface $form_state) {
   protected function operatorForm(&$form, FormStateInterface $form_state) {
     $options = $this->operatorOptions();
     if (!empty($options)) {
-      $form['operator'] = array(
+      $form['operator'] = [
         '#type' => count($options) < 10 ? 'radios' : 'select',
         '#title' => $this->t('Operator'),
         '#default_value' => $this->operator,
         '#options' => $options,
-      );
+      ];
     }
   }
 
@@ -302,7 +302,7 @@ protected function operatorForm(&$form, FormStateInterface $form_state) {
    * Provide a list of options for the default operator form.
    * Should be overridden by classes that don't override operatorForm
    */
-  public function operatorOptions() { return array(); }
+  public function operatorOptions() { return []; }
 
   /**
    * Validate the operator form.
@@ -335,7 +335,7 @@ protected function showValueForm(&$form, FormStateInterface $form_state) {
    * @see buildOptionsForm()
    */
   protected function valueForm(&$form, FormStateInterface $form_state) {
-    $form['value'] = array();
+    $form['value'] = [];
   }
 
   /**
@@ -377,47 +377,47 @@ public function showBuildGroupForm(&$form, FormStateInterface $form_state) {
    */
   protected function showBuildGroupButton(&$form, FormStateInterface $form_state) {
 
-    $form['group_button'] = array(
+    $form['group_button'] = [
       '#prefix' => '<div class="views-grouped clearfix">',
       '#suffix' => '</div>',
       // Should always come after the description and the relationship.
       '#weight' => -190,
-    );
+    ];
 
     $grouped_description = $this->t('Grouped filters allow a choice between predefined operator|value pairs.');
-    $form['group_button']['radios'] = array(
-      '#theme_wrappers' => array('container'),
-      '#attributes' => array('class' => array('js-only')),
-    );
-    $form['group_button']['radios']['radios'] = array(
+    $form['group_button']['radios'] = [
+      '#theme_wrappers' => ['container'],
+      '#attributes' => ['class' => ['js-only']],
+    ];
+    $form['group_button']['radios']['radios'] = [
       '#title' => $this->t('Filter type to expose'),
       '#description' => $grouped_description,
       '#type' => 'radios',
-      '#options' => array(
+      '#options' => [
         $this->t('Single filter'),
         $this->t('Grouped filters'),
-      ),
-    );
+      ],
+    ];
 
     if (empty($this->options['is_grouped'])) {
-      $form['group_button']['markup'] = array(
+      $form['group_button']['markup'] = [
         '#markup' => '<div class="description grouped-description">' . $grouped_description . '</div>',
-      );
-      $form['group_button']['button'] = array(
-        '#limit_validation_errors' => array(),
+      ];
+      $form['group_button']['button'] = [
+        '#limit_validation_errors' => [],
         '#type' => 'submit',
         '#value' => $this->t('Grouped filters'),
-        '#submit' => array(array($this, 'buildGroupForm')),
-      );
+        '#submit' => [[$this, 'buildGroupForm']],
+      ];
       $form['group_button']['radios']['radios']['#default_value'] = 0;
     }
     else {
-      $form['group_button']['button'] = array(
-        '#limit_validation_errors' => array(),
+      $form['group_button']['button'] = [
+        '#limit_validation_errors' => [],
         '#type' => 'submit',
         '#value' => $this->t('Single filter'),
-        '#submit' => array(array($this, 'buildGroupForm')),
-      );
+        '#submit' => [[$this, 'buildGroupForm']],
+      ];
       $form['group_button']['radios']['radios']['#default_value'] = 1;
     }
   }
@@ -453,47 +453,47 @@ public function buildGroupForm($form, FormStateInterface $form_state) {
    * Shortcut to display the expose/hide button.
    */
   public function showExposeButton(&$form, FormStateInterface $form_state) {
-    $form['expose_button'] = array(
+    $form['expose_button'] = [
       '#prefix' => '<div class="views-expose clearfix">',
       '#suffix' => '</div>',
       // Should always come after the description and the relationship.
       '#weight' => -200,
-    );
+    ];
 
     // Add a checkbox for JS users, which will have behavior attached to it
     // so it can replace the button.
-    $form['expose_button']['checkbox'] = array(
-      '#theme_wrappers' => array('container'),
-      '#attributes' => array('class' => array('js-only')),
-    );
-    $form['expose_button']['checkbox']['checkbox'] = array(
+    $form['expose_button']['checkbox'] = [
+      '#theme_wrappers' => ['container'],
+      '#attributes' => ['class' => ['js-only']],
+    ];
+    $form['expose_button']['checkbox']['checkbox'] = [
       '#title' => $this->t('Expose this filter to visitors, to allow them to change it'),
       '#type' => 'checkbox',
-    );
+    ];
 
     // Then add the button itself.
     if (empty($this->options['exposed'])) {
-      $form['expose_button']['markup'] = array(
+      $form['expose_button']['markup'] = [
         '#markup' => '<div class="description exposed-description">' . $this->t('This filter is not exposed. Expose it to allow the users to change it.') . '</div>',
-      );
-      $form['expose_button']['button'] = array(
-        '#limit_validation_errors' => array(),
+      ];
+      $form['expose_button']['button'] = [
+        '#limit_validation_errors' => [],
         '#type' => 'submit',
         '#value' => $this->t('Expose filter'),
-        '#submit' => array(array($this, 'displayExposedForm')),
-      );
+        '#submit' => [[$this, 'displayExposedForm']],
+      ];
       $form['expose_button']['checkbox']['checkbox']['#default_value'] = 0;
     }
     else {
-      $form['expose_button']['markup'] = array(
+      $form['expose_button']['markup'] = [
         '#markup' => '<div class="description exposed-description">' . $this->t('This filter is exposed. If you hide it, users will not be able to change it.') . '</div>',
-      );
-      $form['expose_button']['button'] = array(
-        '#limit_validation_errors' => array(),
+      ];
+      $form['expose_button']['button'] = [
+        '#limit_validation_errors' => [],
         '#type' => 'submit',
         '#value' => $this->t('Hide filter'),
-        '#submit' => array(array($this, 'displayExposedForm')),
-      );
+        '#submit' => [[$this, 'displayExposedForm']],
+      ];
       $form['expose_button']['checkbox']['checkbox']['#default_value'] = 1;
     }
   }
@@ -509,35 +509,35 @@ public function buildExposeForm(&$form, FormStateInterface $form_state) {
     // prior to rendering. That's why the preRender for it needs to run first,
     // so that when the next preRender (the one for fieldsets) runs, it gets
     // the flattened data.
-    array_unshift($form['#pre_render'], array(get_class($this), 'preRenderFlattenData'));
+    array_unshift($form['#pre_render'], [get_class($this), 'preRenderFlattenData']);
     $form['expose']['#flatten'] = TRUE;
 
     if (empty($this->always_required)) {
-      $form['expose']['required'] = array(
+      $form['expose']['required'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Required'),
         '#default_value' => $this->options['expose']['required'],
-      );
+      ];
     }
     else {
-      $form['expose']['required'] = array(
+      $form['expose']['required'] = [
         '#type' => 'value',
         '#value' => TRUE,
-      );
+      ];
     }
-    $form['expose']['label'] = array(
+    $form['expose']['label'] = [
       '#type' => 'textfield',
       '#default_value' => $this->options['expose']['label'],
       '#title' => $this->t('Label'),
       '#size' => 40,
-    );
+    ];
 
-    $form['expose']['description'] = array(
+    $form['expose']['description'] = [
       '#type' => 'textfield',
       '#default_value' => $this->options['expose']['description'],
       '#title' => $this->t('Description'),
       '#size' => 60,
-    );
+    ];
 
     if (!empty($form['operator']['#type'])) {
       // Increase the width of the left (operator) column.
@@ -546,75 +546,75 @@ public function buildExposeForm(&$form, FormStateInterface $form_state) {
       $form['value']['#prefix'] = '<div class="views-group-box views-right-60">';
       $form['value']['#suffix'] = '</div>';
 
-      $form['expose']['use_operator'] = array(
+      $form['expose']['use_operator'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Expose operator'),
         '#description' => $this->t('Allow the user to choose the operator.'),
         '#default_value' => !empty($this->options['expose']['use_operator']),
-      );
-      $form['expose']['operator_id'] = array(
+      ];
+      $form['expose']['operator_id'] = [
         '#type' => 'textfield',
         '#default_value' => $this->options['expose']['operator_id'],
         '#title' => $this->t('Operator identifier'),
         '#size' => 40,
         '#description' => $this->t('This will appear in the URL after the ? to identify this operator.'),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="options[expose][use_operator]"]' => array('checked' => TRUE),
-          ),
-        ),
-      );
+        '#states' => [
+          'visible' => [
+            ':input[name="options[expose][use_operator]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ];
     }
     else {
-      $form['expose']['operator_id'] = array(
+      $form['expose']['operator_id'] = [
         '#type' => 'value',
         '#value' => '',
-      );
+      ];
     }
 
     if (empty($this->alwaysMultiple)) {
-      $form['expose']['multiple'] = array(
+      $form['expose']['multiple'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Allow multiple selections'),
         '#description' => $this->t('Enable to allow users to select multiple items.'),
         '#default_value' => $this->options['expose']['multiple'],
-      );
+      ];
     }
-    $form['expose']['remember'] = array(
+    $form['expose']['remember'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Remember the last selection'),
       '#description' => $this->t('Enable to remember the last selection made by the user.'),
       '#default_value' => $this->options['expose']['remember'],
-    );
+    ];
 
     $role_options = array_map('\Drupal\Component\Utility\Html::escape', user_role_names());
-    $form['expose']['remember_roles'] = array(
+    $form['expose']['remember_roles'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('User roles'),
       '#description' => $this->t('Remember exposed selection only for the selected user role(s). If you select no roles, the exposed data will never be stored.'),
       '#default_value' => $this->options['expose']['remember_roles'],
       '#options' => $role_options,
-      '#states' => array(
-        'invisible' => array(
-          ':input[name="options[expose][remember]"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
-
-    $form['expose']['identifier'] = array(
+      '#states' => [
+        'invisible' => [
+          ':input[name="options[expose][remember]"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
+
+    $form['expose']['identifier'] = [
       '#type' => 'textfield',
       '#default_value' => $this->options['expose']['identifier'],
       '#title' => $this->t('Filter identifier'),
       '#size' => 40,
       '#description' => $this->t('This will appear in the URL after the ? to identify this filter. Cannot be blank. Only letters, digits and the dot ("."), hyphen ("-"), underscore ("_"), and tilde ("~") characters are allowed.'),
-    );
+    ];
   }
 
   /**
    * Validate the options form.
    */
   public function validateExposeForm($form, FormStateInterface $form_state) {
-    $identifier = $form_state->getValue(array('options', 'expose', 'identifier'));
+    $identifier = $form_state->getValue(['options', 'expose', 'identifier']);
     $this->validateIdentifier($identifier, $form_state, $form['expose']['identifier']);
   }
 
@@ -654,12 +654,12 @@ protected function hasValidGroupedValue(array $group) {
    * Validate the build group options form.
    */
   protected function buildGroupValidate($form, FormStateInterface $form_state) {
-    if (!$form_state->isValueEmpty(array('options', 'group_info'))) {
-      $identifier = $form_state->getValue(array('options', 'group_info', 'identifier'));
+    if (!$form_state->isValueEmpty(['options', 'group_info'])) {
+      $identifier = $form_state->getValue(['options', 'group_info', 'identifier']);
       $this->validateIdentifier($identifier, $form_state, $form['group_info']['identifier']);
     }
 
-    if ($group_items = $form_state->getValue(array('options', 'group_info', 'group_items'))) {
+    if ($group_items = $form_state->getValue(['options', 'group_info', 'group_items'])) {
       foreach ($group_items as $id => $group) {
         if (empty($group['remove'])) {
           $has_valid_value = $this->hasValidGroupedValue($group);
@@ -694,7 +694,7 @@ protected function buildGroupValidate($form, FormStateInterface $form_state) {
    *
    * @return string
    */
-  protected function validateIdentifier($identifier, FormStateInterface $form_state = NULL, &$form_group = array()) {
+  protected function validateIdentifier($identifier, FormStateInterface $form_state = NULL, &$form_group = []) {
     $error = '';
     if (empty($identifier)) {
       $error = $this->t('The identifier is required if the filter is exposed.');
@@ -720,9 +720,9 @@ protected function validateIdentifier($identifier, FormStateInterface $form_stat
    * Save new group items, re-enumerates and remove groups marked to delete.
    */
   protected function buildGroupSubmit($form, FormStateInterface $form_state) {
-    $groups = array();
-    $group_items = $form_state->getValue(array('options', 'group_info', 'group_items'));
-    uasort($group_items, array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
+    $groups = [];
+    $group_items = $form_state->getValue(['options', 'group_info', 'group_items']);
+    uasort($group_items, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
     // Filter out removed items.
 
     // Start from 1 to avoid problems with #default_value in the widget.
@@ -735,26 +735,26 @@ protected function buildGroupSubmit($form, FormStateInterface $form_state) {
         unset($group['weight']);
         $groups[$new_id] = $group;
 
-        if ($form_state->getValue(array('options', 'group_info', 'default_group')) == $id) {
+        if ($form_state->getValue(['options', 'group_info', 'default_group']) == $id) {
           $new_default = $new_id;
         }
       }
       $new_id++;
     }
     if ($new_default != 'All') {
-      $form_state->setValue(array('options', 'group_info', 'default_group'), $new_default);
+      $form_state->setValue(['options', 'group_info', 'default_group'], $new_default);
     }
-    $filter_default_multiple = $form_state->getValue(array('options', 'group_info', 'default_group_multiple'));
-    $form_state->setValue(array('options', 'group_info', 'default_group_multiple'), array_filter($filter_default_multiple));
+    $filter_default_multiple = $form_state->getValue(['options', 'group_info', 'default_group_multiple']);
+    $form_state->setValue(['options', 'group_info', 'default_group_multiple'], array_filter($filter_default_multiple));
 
-    $form_state->setValue(array('options', 'group_info', 'group_items'), $groups);
+    $form_state->setValue(['options', 'group_info', 'group_items'], $groups);
   }
 
   /**
    * Provide default options for exposed filters.
    */
   public function defaultExposeOptions() {
-    $this->options['expose'] = array(
+    $this->options['expose'] = [
       'use_operator' => FALSE,
       'operator' => $this->options['id'] . '_op',
       'identifier' => $this->options['id'],
@@ -763,14 +763,14 @@ public function defaultExposeOptions() {
       'remember' => FALSE,
       'multiple' => FALSE,
       'required' => FALSE,
-    );
+    ];
   }
 
   /**
    * Provide default options for exposed filters.
    */
   protected function buildGroupOptions() {
-    $this->options['group_info'] = array(
+    $this->options['group_info'] = [
       'label' => $this->definition['title'],
       'description' => NULL,
       'identifier' => $this->options['id'],
@@ -779,9 +779,9 @@ protected function buildGroupOptions() {
       'multiple' => FALSE,
       'remember' => FALSE,
       'default_group' => 'All',
-      'default_group_multiple' => array(),
-      'group_items' => array(),
-    );
+      'default_group_multiple' => [],
+      'group_items' => [],
+    ];
   }
 
   /**
@@ -790,7 +790,7 @@ protected function buildGroupOptions() {
    */
   public function groupForm(&$form, FormStateInterface $form_state) {
     if (!empty($this->options['group_info']['optional']) && !$this->multipleExposedInput()) {
-      $groups = array('All' => $this->t('- Any -'));
+      $groups = ['All' => $this->t('- Any -')];
     }
     foreach ($this->options['group_info']['group_items'] as $id => $group) {
       if (!empty($group['title'])) {
@@ -801,12 +801,12 @@ public function groupForm(&$form, FormStateInterface $form_state) {
     if (count($groups)) {
       $value = $this->options['group_info']['identifier'];
 
-      $form[$value] = array(
+      $form[$value] = [
         '#title' => $this->options['group_info']['label'],
         '#type' => $this->options['group_info']['widget'],
         '#default_value' => $this->group_info,
         '#options' => $groups,
-      );
+      ];
       if (!empty($this->options['group_info']['multiple'])) {
         if (count($groups) < 5) {
           $form[$value]['#type'] = 'checkboxes';
@@ -890,7 +890,7 @@ protected function buildExposedFiltersGroupForm(&$form, FormStateInterface $form
     // prior to rendering. That's why the preRender for it needs to run first,
     // so that when the next preRender (the one for fieldsets) runs, it gets
     // the flattened data.
-    array_unshift($form['#pre_render'], array(get_class($this), 'preRenderFlattenData'));
+    array_unshift($form['#pre_render'], [get_class($this), 'preRenderFlattenData']);
     $form['group_info']['#flatten'] = TRUE;
 
     if (!empty($this->options['group_info']['identifier'])) {
@@ -899,53 +899,53 @@ protected function buildExposedFiltersGroupForm(&$form, FormStateInterface $form
     else {
       $identifier = 'group_' . $this->options['expose']['identifier'];
     }
-    $form['group_info']['identifier'] = array(
+    $form['group_info']['identifier'] = [
       '#type' => 'textfield',
       '#default_value' => $identifier,
       '#title' => $this->t('Filter identifier'),
       '#size' => 40,
       '#description' => $this->t('This will appear in the URL after the ? to identify this filter. Cannot be blank. Only letters, digits and the dot ("."), hyphen ("-"), underscore ("_"), and tilde ("~") characters are allowed.'),
-    );
-    $form['group_info']['label'] = array(
+    ];
+    $form['group_info']['label'] = [
       '#type' => 'textfield',
       '#default_value' => $this->options['group_info']['label'],
       '#title' => $this->t('Label'),
       '#size' => 40,
-    );
-    $form['group_info']['description'] = array(
+    ];
+    $form['group_info']['description'] = [
       '#type' => 'textfield',
       '#default_value' => $this->options['group_info']['description'],
       '#title' => $this->t('Description'),
       '#size' => 60,
-    );
-    $form['group_info']['optional'] = array(
+    ];
+    $form['group_info']['optional'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Optional'),
       '#description' => $this->t('This exposed filter is optional and will have added options to allow it not to be set.'),
       '#default_value' => $this->options['group_info']['optional'],
-    );
-    $form['group_info']['multiple'] = array(
+    ];
+    $form['group_info']['multiple'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow multiple selections'),
       '#description' => $this->t('Enable to allow users to select multiple items.'),
       '#default_value' => $this->options['group_info']['multiple'],
-    );
-    $form['group_info']['widget'] = array(
+    ];
+    $form['group_info']['widget'] = [
       '#type' => 'radios',
       '#default_value' => $this->options['group_info']['widget'],
       '#title' => $this->t('Widget type'),
-      '#options' => array(
+      '#options' => [
         'radios' => $this->t('Radios'),
         'select' => $this->t('Select'),
-      ),
+      ],
       '#description' => $this->t('Select which kind of widget will be used to render the group of filters'),
-    );
-    $form['group_info']['remember'] = array(
+    ];
+    $form['group_info']['remember'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Remember'),
       '#description' => $this->t('Remember the last setting the user gave this filter.'),
       '#default_value' => $this->options['group_info']['remember'],
-    );
+    ];
 
     if (!empty($this->options['group_info']['identifier'])) {
       $identifier = $this->options['group_info']['identifier'];
@@ -953,53 +953,53 @@ protected function buildExposedFiltersGroupForm(&$form, FormStateInterface $form
     else {
       $identifier = 'group_' . $this->options['expose']['identifier'];
     }
-    $form['group_info']['identifier'] = array(
+    $form['group_info']['identifier'] = [
       '#type' => 'textfield',
       '#default_value' => $identifier,
       '#title' => $this->t('Filter identifier'),
       '#size' => 40,
       '#description' => $this->t('This will appear in the URL after the ? to identify this filter. Cannot be blank. Only letters, digits and the dot ("."), hyphen ("-"), underscore ("_"), and tilde ("~") characters are allowed.'),
-    );
-    $form['group_info']['label'] = array(
+    ];
+    $form['group_info']['label'] = [
       '#type' => 'textfield',
       '#default_value' => $this->options['group_info']['label'],
       '#title' => $this->t('Label'),
       '#size' => 40,
-    );
-    $form['group_info']['optional'] = array(
+    ];
+    $form['group_info']['optional'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Optional'),
       '#description' => $this->t('This exposed filter is optional and will have added options to allow it not to be set.'),
       '#default_value' => $this->options['group_info']['optional'],
-    );
-    $form['group_info']['widget'] = array(
+    ];
+    $form['group_info']['widget'] = [
       '#type' => 'radios',
       '#default_value' => $this->options['group_info']['widget'],
       '#title' => $this->t('Widget type'),
-      '#options' => array(
+      '#options' => [
         'radios' => $this->t('Radios'),
         'select' => $this->t('Select'),
-      ),
+      ],
       '#description' => $this->t('Select which kind of widget will be used to render the group of filters'),
-    );
-    $form['group_info']['remember'] = array(
+    ];
+    $form['group_info']['remember'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Remember'),
       '#description' => $this->t('Remember the last setting the user gave this filter.'),
       '#default_value' => $this->options['group_info']['remember'],
-    );
+    ];
 
-    $groups = array('All' => $this->t('- Any -')); // The string '- Any -' will not be rendered see @theme_views_ui_build_group_filter_form
+    $groups = ['All' => $this->t('- Any -')]; // The string '- Any -' will not be rendered see @theme_views_ui_build_group_filter_form
 
     // Provide 3 options to start when we are in a new group.
     if (count($this->options['group_info']['group_items']) == 0) {
-      $this->options['group_info']['group_items'] = array_fill(1, 3, array());
+      $this->options['group_info']['group_items'] = array_fill(1, 3, []);
     }
 
     // After the general settings, comes a table with all the existent groups.
     $default_weight = 0;
     foreach ($this->options['group_info']['group_items'] as $item_id => $item) {
-      if (!$form_state->isValueEmpty(array('options', 'group_info', 'group_items', $item_id, 'remove'))) {
+      if (!$form_state->isValueEmpty(['options', 'group_info', 'group_items', $item_id, 'remove'])) {
         continue;
       }
       // Each rows contains three widgets:
@@ -1009,8 +1009,8 @@ protected function buildExposedFiltersGroupForm(&$form, FormStateInterface $form
 
       // In each row, we have to display the operator form and the value from
       // $row acts as a fake form to render each widget in a row.
-      $row = array();
-      $groups[$item_id] = $this->t('Grouping @id', array('@id' => $item_id));
+      $row = [];
+      $groups[$item_id] = $this->t('Grouping @id', ['@id' => $item_id]);
       $this->operatorForm($row, $form_state);
       // Force the operator form to be a select box. Some handlers uses
       // radios and they occupy a lot of space in a table row.
@@ -1057,71 +1057,71 @@ protected function buildExposedFiltersGroupForm(&$form, FormStateInterface $form
       }
 
       // Per item group, we have a title that identifies it.
-      $form['group_info']['group_items'][$item_id] = array(
-        'title' => array(
+      $form['group_info']['group_items'][$item_id] = [
+        'title' => [
           '#title' => $this->t('Label'),
           '#title_display' => 'invisible',
           '#type' => 'textfield',
           '#size' => 20,
           '#default_value' => $default_title,
-        ),
+        ],
         'operator' => $row['operator'],
         'value' => $row['value'],
         // No title is given here, since this input is never displayed. It is
         // only triggered by JavaScript.
-        'remove' => array(
+        'remove' => [
           '#type' => 'checkbox',
           '#id' => 'views-removed-' . $item_id,
-          '#attributes' => array('class' => array('views-remove-checkbox')),
+          '#attributes' => ['class' => ['views-remove-checkbox']],
           '#default_value' => 0,
-        ),
-        'weight' => array(
+        ],
+        'weight' => [
           '#title' => $this->t('Weight'),
           '#title_display' => 'invisible',
           '#type' => 'weight',
           '#delta' => 10,
           '#default_value' => $default_weight++,
-          '#attributes' => array('class' => array('weight')),
-        ),
-      );
+          '#attributes' => ['class' => ['weight']],
+        ],
+      ];
     }
     // From all groups, let chose which is the default.
-    $form['group_info']['default_group'] = array(
+    $form['group_info']['default_group'] = [
       '#type' => 'radios',
       '#options' => $groups,
       '#default_value' => $this->options['group_info']['default_group'],
       '#required' => TRUE,
-      '#attributes' => array(
-        'class' => array('default-radios'),
-      )
-    );
+      '#attributes' => [
+        'class' => ['default-radios'],
+      ]
+    ];
     // From all groups, let chose which is the default.
-    $form['group_info']['default_group_multiple'] = array(
+    $form['group_info']['default_group_multiple'] = [
       '#type' => 'checkboxes',
       '#options' => $groups,
       '#default_value' => $this->options['group_info']['default_group_multiple'],
-      '#attributes' => array(
-        'class' => array('default-checkboxes'),
-      )
-    );
+      '#attributes' => [
+        'class' => ['default-checkboxes'],
+      ]
+    ];
 
-    $form['group_info']['add_group'] = array(
+    $form['group_info']['add_group'] = [
       '#prefix' => '<div class="views-build-group clear-block">',
       '#suffix' => '</div>',
       '#type' => 'submit',
       '#value' => $this->t('Add another item'),
-      '#submit' => array(array($this, 'addGroupForm')),
-    );
+      '#submit' => [[$this, 'addGroupForm']],
+    ];
 
-    $js = array();
-    $js['tableDrag']['views-filter-groups']['weight'][0] = array(
+    $js = [];
+    $js['tableDrag']['views-filter-groups']['weight'][0] = [
       'target' => 'weight',
       'source' => NULL,
       'relationship' => 'sibling',
       'action' => 'order',
       'hidden' => TRUE,
       'limit' => 0,
-    );
+    ];
     $js_settings = $form_state->get('js_settings');
     if ($js_settings && is_array($js)) {
       $js_settings = array_merge($js_settings, $js);
@@ -1139,7 +1139,7 @@ public function addGroupForm($form, FormStateInterface $form_state) {
     $item = &$this->options;
 
     // Add a new row.
-    $item['group_info']['group_items'][] = array();
+    $item['group_info']['group_items'][] = [];
 
     $view = $form_state->get('view');
     $display_id = $form_state->get('display_id');
@@ -1186,7 +1186,7 @@ protected function exposedTranslate(&$form, $type) {
     }
 
     if ($type == 'value' && empty($this->always_required) && empty($this->options['expose']['required']) && $form['#type'] == 'select' && empty($form['#multiple'])) {
-      $form['#options'] = array('All' => $this->t('- Any -')) + $form['#options'];
+      $form['#options'] = ['All' => $this->t('- Any -')] + $form['#options'];
       $form['#default_value'] = 'All';
     }
 
@@ -1240,19 +1240,19 @@ public function exposedInfo() {
     }
 
     if ($this->isAGroup()) {
-      return array(
+      return [
         'value' => $this->options['group_info']['identifier'],
         'label' => $this->options['group_info']['label'],
         'description' => $this->options['group_info']['description'],
-      );
+      ];
     }
 
-    return array(
+    return [
       'operator' => $this->options['expose']['operator_id'],
       'value' => $this->options['expose']['identifier'],
       'label' => $this->options['expose']['label'],
       'description' => $this->options['expose']['description'],
-    );
+    ];
   }
 
   /**
@@ -1309,7 +1309,7 @@ public function groupMultipleExposedInput(&$input) {
     if (!empty($input[$this->options['group_info']['identifier']])) {
       return array_filter($input[$this->options['group_info']['identifier']]);
     }
-    return array();
+    return [];
   }
 
   /**
@@ -1350,7 +1350,7 @@ public function storeGroupInput($input, $status) {
 
     if ($status !== FALSE) {
       if (!isset($_SESSION['views'][$this->view->storage->id()][$display_id])) {
-        $_SESSION['views'][$this->view->storage->id()][$display_id] = array();
+        $_SESSION['views'][$this->view->storage->id()][$display_id] = [];
       }
 
       $session = &$_SESSION['views'][$this->view->storage->id()][$display_id];
@@ -1388,7 +1388,7 @@ public function acceptExposedInput($input) {
         }
 
         if ($this->operator != 'empty' && $this->operator != 'not empty') {
-          if ($value == 'All' || $value === array()) {
+          if ($value == 'All' || $value === []) {
             return FALSE;
           }
 
@@ -1406,7 +1406,7 @@ public function acceptExposedInput($input) {
       if (isset($value)) {
         $this->value = $value;
         if (empty($this->alwaysMultiple) && empty($this->options['expose']['multiple']) && !is_array($value)) {
-          $this->value = array($value);
+          $this->value = [$value];
         }
       }
       else {
@@ -1428,7 +1428,7 @@ public function storeExposedInput($input, $status) {
 
     // Check if we store exposed value for current user.
     $user = \Drupal::currentUser();
-    $allowed_rids = empty($this->options['expose']['remember_roles']) ? array() : array_filter($this->options['expose']['remember_roles']);
+    $allowed_rids = empty($this->options['expose']['remember_roles']) ? [] : array_filter($this->options['expose']['remember_roles']);
     $intersect_rids = array_intersect(array_keys($allowed_rids), $user->getRoles());
     if (empty($intersect_rids)) {
       return;
@@ -1456,7 +1456,7 @@ public function storeExposedInput($input, $status) {
 
     if ($status) {
       if (!isset($_SESSION['views'][$this->view->storage->id()][$display_id])) {
-        $_SESSION['views'][$this->view->storage->id()][$display_id] = array();
+        $_SESSION['views'][$this->view->storage->id()][$display_id] = [];
       }
 
       $session = &$_SESSION['views'][$this->view->storage->id()][$display_id];
diff --git a/core/modules/views/src/Plugin/views/filter/GroupByNumeric.php b/core/modules/views/src/Plugin/views/filter/GroupByNumeric.php
index 4f1baa189daf04690338f0b39607d43cb34a25cc..4934e6e7a919961c0f6bec4c5682960d255a8bfe 100644
--- a/core/modules/views/src/Plugin/views/filter/GroupByNumeric.php
+++ b/core/modules/views/src/Plugin/views/filter/GroupByNumeric.php
@@ -24,17 +24,17 @@ protected function opBetween($field) {
     $placeholder_min = $this->placeholder();
     $placeholder_max = $this->placeholder();
     if ($this->operator == 'between') {
-      $this->query->addHavingExpression($this->options['group'], "$field >= $placeholder_min", array($placeholder_min => $this->value['min']));
-      $this->query->addHavingExpression($this->options['group'], "$field <= $placeholder_max", array($placeholder_max => $this->value['max']));
+      $this->query->addHavingExpression($this->options['group'], "$field >= $placeholder_min", [$placeholder_min => $this->value['min']]);
+      $this->query->addHavingExpression($this->options['group'], "$field <= $placeholder_max", [$placeholder_max => $this->value['max']]);
     }
     else {
-      $this->query->addHavingExpression($this->options['group'], "$field < $placeholder_min OR $field > $placeholder_max", array($placeholder_min => $this->value['min'], $placeholder_max => $this->value['max']));
+      $this->query->addHavingExpression($this->options['group'], "$field < $placeholder_min OR $field > $placeholder_max", [$placeholder_min => $this->value['min'], $placeholder_max => $this->value['max']]);
     }
   }
 
   protected function opSimple($field) {
     $placeholder = $this->placeholder();
-    $this->query->addHavingExpression($this->options['group'], "$field $this->operator $placeholder", array($placeholder => $this->value['value']));
+    $this->query->addHavingExpression($this->options['group'], "$field $this->operator $placeholder", [$placeholder => $this->value['value']]);
   }
 
   protected function opEmpty($field) {
diff --git a/core/modules/views/src/Plugin/views/filter/InOperator.php b/core/modules/views/src/Plugin/views/filter/InOperator.php
index ff4186f4ae7a2561eae1f53686a9fb98325c4b89..df01536824f12a225e19d9c4aff2632ed5b3447e 100644
--- a/core/modules/views/src/Plugin/views/filter/InOperator.php
+++ b/core/modules/views/src/Plugin/views/filter/InOperator.php
@@ -71,7 +71,7 @@ public function getValueOptions() {
       }
     }
     else {
-      $this->valueOptions = array(t('Yes'), $this->t('No'));
+      $this->valueOptions = [t('Yes'), $this->t('No')];
     }
 
     return $this->valueOptions;
@@ -84,20 +84,20 @@ public function defaultExposeOptions() {
 
   public function buildExposeForm(&$form, FormStateInterface $form_state) {
     parent::buildExposeForm($form, $form_state);
-    $form['expose']['reduce'] = array(
+    $form['expose']['reduce'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Limit list to selected items'),
       '#description' => $this->t('If checked, the only items presented to the user will be the ones selected here.'),
       '#default_value' => !empty($this->options['expose']['reduce']), // safety
-    );
+    ];
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
 
     $options['operator']['default'] = 'in';
-    $options['value']['default'] = array();
-    $options['expose']['contains']['reduce'] = array('default' => FALSE);
+    $options['value']['default'] = [];
+    $options['expose']['contains']['reduce'] = ['default' => FALSE];
 
     return $options;
   }
@@ -108,38 +108,38 @@ protected function defineOptions() {
    * adding/removing items from this array.
    */
   function operators() {
-    $operators = array(
-      'in' => array(
+    $operators = [
+      'in' => [
         'title' => $this->t('Is one of'),
         'short' => $this->t('in'),
         'short_single' => $this->t('='),
         'method' => 'opSimple',
         'values' => 1,
-      ),
-      'not in' => array(
+      ],
+      'not in' => [
         'title' => $this->t('Is not one of'),
         'short' => $this->t('not in'),
         'short_single' => $this->t('<>'),
         'method' => 'opSimple',
         'values' => 1,
-      ),
-    );
+      ],
+    ];
     // if the definition allows for the empty operator, add it.
     if (!empty($this->definition['allow empty'])) {
-      $operators += array(
-        'empty' => array(
+      $operators += [
+        'empty' => [
           'title' => $this->t('Is empty (NULL)'),
           'method' => 'opEmpty',
           'short' => $this->t('empty'),
           'values' => 0,
-        ),
-        'not empty' => array(
+        ],
+        'not empty' => [
           'title' => $this->t('Is not empty (NOT NULL)'),
           'method' => 'opEmpty',
           'short' => $this->t('not empty'),
           'values' => 0,
-        ),
-      );
+        ],
+      ];
     }
 
     return $operators;
@@ -149,7 +149,7 @@ function operators() {
    * Build strings from the operators() for 'select' options
    */
   public function operatorOptions($which = 'title') {
-    $options = array();
+    $options = [];
     foreach ($this->operators() as $id => $info) {
       $options[$id] = $info[$which];
     }
@@ -158,7 +158,7 @@ public function operatorOptions($which = 'title') {
   }
 
   protected function operatorValues($values = 1) {
-    $options = array();
+    $options = [];
     foreach ($this->operators() as $id => $info) {
       if (isset($info['values']) && $info['values'] == $values) {
         $options[] = $id;
@@ -169,13 +169,13 @@ protected function operatorValues($values = 1) {
   }
 
   protected function valueForm(&$form, FormStateInterface $form_state) {
-    $form['value'] = array();
-    $options = array();
+    $form['value'] = [];
+    $options = [];
 
     $exposed = $form_state->get('exposed');
     if (!$exposed) {
       // Add a select all option to the value form.
-      $options = array('all' => $this->t('Select all'));
+      $options = ['all' => $this->t('Select all')];
     }
 
     $this->getValueOptions();
@@ -201,7 +201,7 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
         $options = $this->reduceValueOptions();
 
         if (!empty($this->options['expose']['multiple']) && empty($this->options['expose']['required'])) {
-          $default_value = array();
+          $default_value = [];
         }
       }
 
@@ -221,7 +221,7 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
     }
 
     if ($which == 'all' || $which == 'value') {
-      $form['value'] = array(
+      $form['value'] = [
         '#type' => $this->valueFormType,
         '#title' => $this->valueTitle,
         '#options' => $options,
@@ -229,7 +229,7 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
         // These are only valid for 'select' type, but do no harm to checkboxes.
         '#multiple' => TRUE,
         '#size' => count($options) > 8 ? 8 : count($options),
-      );
+      ];
       $user_input = $form_state->getUserInput();
       if ($exposed && !isset($user_input[$identifier])) {
         $user_input[$identifier] = $default_value;
@@ -243,9 +243,9 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
         }
         // Setup #states for all operators with one value.
         foreach ($this->operatorValues(1) as $operator) {
-          $form['value']['#states']['visible'][] = array(
-            $source => array('value' => $operator),
-          );
+          $form['value']['#states']['visible'][] = [
+            $source => ['value' => $operator],
+          ];
         }
       }
     }
@@ -262,7 +262,7 @@ public function reduceValueOptions($input = NULL) {
     // Because options may be an array of strings, or an array of mixed arrays
     // and strings (optgroups) or an array of objects, we have to
     // step through and handle each one individually.
-    $options = array();
+    $options = [];
     foreach ($input as $id => $option) {
       if (is_array($option)) {
         $options[$id] = $this->reduceValueOptions($option);
@@ -313,7 +313,7 @@ protected function valueSubmit($form, FormStateInterface $form_state) {
     // *only* a list of checkboxes that were set, and we can use that
     // instead.
 
-    $form_state->setValue(array('options', 'value'), $form['value']['#value']);
+    $form_state->setValue(['options', 'value'], $form['value']['#value']);
   }
 
   public function adminSummary() {
@@ -417,11 +417,11 @@ public function validate() {
     // If the operator is an operator which doesn't require a value, there is
     // no need for additional validation.
     if (in_array($this->operator, $this->operatorValues(0))) {
-      return array();
+      return [];
     }
 
     if (!in_array($this->operator, $this->operatorValues(1))) {
-      $errors[] = $this->t('The operator is invalid on filter: @filter.', array('@filter' => $this->adminLabel(TRUE)));
+      $errors[] = $this->t('The operator is invalid on filter: @filter.', ['@filter' => $this->adminLabel(TRUE)]);
     }
     if (is_array($this->value)) {
       if (!isset($this->valueOptions)) {
@@ -444,11 +444,11 @@ public function validate() {
       }
       // Choose different kind of output for 0, a single and multiple values.
       if (count($this->value) == 0) {
-        $errors[] = $this->t('No valid values found on filter: @filter.', array('@filter' => $this->adminLabel(TRUE)));
+        $errors[] = $this->t('No valid values found on filter: @filter.', ['@filter' => $this->adminLabel(TRUE)]);
       }
     }
     elseif (!empty($this->value) && ($this->operator == 'in' || $this->operator == 'not in')) {
-      $errors[] = $this->t('The value @value is not an array for @operator on filter: @filter', array('@value' => var_export($this->value), '@operator' => $this->operator, '@filter' => $this->adminLabel(TRUE)));
+      $errors[] = $this->t('The value @value is not an array for @operator on filter: @filter', ['@value' => var_export($this->value), '@operator' => $this->operator, '@filter' => $this->adminLabel(TRUE)]);
     }
     return $errors;
   }
diff --git a/core/modules/views/src/Plugin/views/filter/ManyToOne.php b/core/modules/views/src/Plugin/views/filter/ManyToOne.php
index 7fa1fbc46fec0ae0cbb67fb07a233e86954039cb..645dc819c2ea8482963a65c00fecbf436303a3dc 100644
--- a/core/modules/views/src/Plugin/views/filter/ManyToOne.php
+++ b/core/modules/views/src/Plugin/views/filter/ManyToOne.php
@@ -41,7 +41,7 @@ protected function defineOptions() {
     $options = parent::defineOptions();
 
     $options['operator']['default'] = 'or';
-    $options['value']['default'] = array();
+    $options['value']['default'] = [];
 
     if (isset($this->helper)) {
       $this->helper->defineOptions($options);
@@ -55,48 +55,48 @@ protected function defineOptions() {
   }
 
   function operators() {
-    $operators = array(
-      'or' => array(
+    $operators = [
+      'or' => [
         'title' => $this->t('Is one of'),
         'short' => $this->t('or'),
         'short_single' => $this->t('='),
         'method' => 'opHelper',
         'values' => 1,
         'ensure_my_table' => 'helper',
-      ),
-      'and' => array(
+      ],
+      'and' => [
         'title' => $this->t('Is all of'),
         'short' => $this->t('and'),
         'short_single' => $this->t('='),
         'method' => 'opHelper',
         'values' => 1,
         'ensure_my_table' => 'helper',
-      ),
-      'not' => array(
+      ],
+      'not' => [
         'title' => $this->t('Is none of'),
         'short' => $this->t('not'),
         'short_single' => $this->t('<>'),
         'method' => 'opHelper',
         'values' => 1,
         'ensure_my_table' => 'helper',
-      ),
-    );
+      ],
+    ];
     // if the definition allows for the empty operator, add it.
     if (!empty($this->definition['allow empty'])) {
-      $operators += array(
-        'empty' => array(
+      $operators += [
+        'empty' => [
           'title' => $this->t('Is empty (NULL)'),
           'method' => 'opEmpty',
           'short' => $this->t('empty'),
           'values' => 0,
-        ),
-        'not empty' => array(
+        ],
+        'not empty' => [
           'title' => $this->t('Is not empty (NOT NULL)'),
           'method' => 'opEmpty',
           'short' => $this->t('not empty'),
           'values' => 0,
-        ),
-      );
+        ],
+      ];
     }
 
     return $operators;
diff --git a/core/modules/views/src/Plugin/views/filter/NumericFilter.php b/core/modules/views/src/Plugin/views/filter/NumericFilter.php
index d1b5257a644d0658c614c0d560aa226353870f09..347c9f2cc472af2cf1d04aad306f5bc2f2d329cd 100644
--- a/core/modules/views/src/Plugin/views/filter/NumericFilter.php
+++ b/core/modules/views/src/Plugin/views/filter/NumericFilter.php
@@ -18,91 +18,91 @@ class NumericFilter extends FilterPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['value'] = array(
-      'contains' => array(
-        'min' => array('default' => ''),
-        'max' => array('default' => ''),
-        'value' => array('default' => ''),
-      ),
-    );
+    $options['value'] = [
+      'contains' => [
+        'min' => ['default' => ''],
+        'max' => ['default' => ''],
+        'value' => ['default' => ''],
+      ],
+    ];
 
     return $options;
   }
 
   function operators() {
-    $operators = array(
-      '<' => array(
+    $operators = [
+      '<' => [
         'title' => $this->t('Is less than'),
         'method' => 'opSimple',
         'short' => $this->t('<'),
         'values' => 1,
-      ),
-      '<=' => array(
+      ],
+      '<=' => [
         'title' => $this->t('Is less than or equal to'),
         'method' => 'opSimple',
         'short' => $this->t('<='),
         'values' => 1,
-      ),
-      '=' => array(
+      ],
+      '=' => [
         'title' => $this->t('Is equal to'),
         'method' => 'opSimple',
         'short' => $this->t('='),
         'values' => 1,
-      ),
-      '!=' => array(
+      ],
+      '!=' => [
         'title' => $this->t('Is not equal to'),
         'method' => 'opSimple',
         'short' => $this->t('!='),
         'values' => 1,
-      ),
-      '>=' => array(
+      ],
+      '>=' => [
         'title' => $this->t('Is greater than or equal to'),
         'method' => 'opSimple',
         'short' => $this->t('>='),
         'values' => 1,
-      ),
-      '>' => array(
+      ],
+      '>' => [
         'title' => $this->t('Is greater than'),
         'method' => 'opSimple',
         'short' => $this->t('>'),
         'values' => 1,
-      ),
-      'between' => array(
+      ],
+      'between' => [
         'title' => $this->t('Is between'),
         'method' => 'opBetween',
         'short' => $this->t('between'),
         'values' => 2,
-      ),
-      'not between' => array(
+      ],
+      'not between' => [
         'title' => $this->t('Is not between'),
         'method' => 'opBetween',
         'short' => $this->t('not between'),
         'values' => 2,
-      ),
-      'regular_expression' => array(
+      ],
+      'regular_expression' => [
         'title' => $this->t('Regular expression'),
         'short' => $this->t('regex'),
         'method' => 'opRegex',
         'values' => 1,
-      ),
-    );
+      ],
+    ];
 
     // if the definition allows for the empty operator, add it.
     if (!empty($this->definition['allow empty'])) {
-      $operators += array(
-        'empty' => array(
+      $operators += [
+        'empty' => [
           'title' => $this->t('Is empty (NULL)'),
           'method' => 'opEmpty',
           'short' => $this->t('empty'),
           'values' => 0,
-        ),
-        'not empty' => array(
+        ],
+        'not empty' => [
           'title' => $this->t('Is not empty (NOT NULL)'),
           'method' => 'opEmpty',
           'short' => $this->t('not empty'),
           'values' => 0,
-        ),
-      );
+        ],
+      ];
     }
 
     return $operators;
@@ -112,7 +112,7 @@ function operators() {
    * Provide a list of all the numeric operators
    */
   public function operatorOptions($which = 'title') {
-    $options = array();
+    $options = [];
     foreach ($this->operators() as $id => $info) {
       $options[$id] = $info[$which];
     }
@@ -121,7 +121,7 @@ public function operatorOptions($which = 'title') {
   }
 
   protected function operatorValues($values = 1) {
-    $options = array();
+    $options = [];
     foreach ($this->operators() as $id => $info) {
       if ($info['values'] == $values) {
         $options[] = $id;
@@ -159,17 +159,17 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
 
     $user_input = $form_state->getUserInput();
     if ($which == 'all') {
-      $form['value']['value'] = array(
+      $form['value']['value'] = [
         '#type' => 'textfield',
         '#title' => !$exposed ? $this->t('Value') : '',
         '#size' => 30,
         '#default_value' => $this->value['value'],
-      );
+      ];
       // Setup #states for all operators with one value.
       foreach ($this->operatorValues(1) as $operator) {
-        $form['value']['value']['#states']['visible'][] = array(
-          $source => array('value' => $operator),
-        );
+        $form['value']['value']['#states']['visible'][] = [
+          $source => ['value' => $operator],
+        ];
       }
       if ($exposed && !isset($user_input[$identifier]['value'])) {
         $user_input[$identifier]['value'] = $this->value['value'];
@@ -179,12 +179,12 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
     elseif ($which == 'value') {
       // When exposed we drop the value-value and just do value if
       // the operator is locked.
-      $form['value'] = array(
+      $form['value'] = [
         '#type' => 'textfield',
         '#title' => !$exposed ? $this->t('Value') : '',
         '#size' => 30,
         '#default_value' => $this->value['value'],
-      );
+      ];
       if ($exposed && !isset($user_input[$identifier])) {
         $user_input[$identifier] = $this->value['value'];
         $form_state->setUserInput($user_input);
@@ -192,26 +192,26 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
     }
 
     if ($which == 'all' || $which == 'minmax') {
-      $form['value']['min'] = array(
+      $form['value']['min'] = [
         '#type' => 'textfield',
         '#title' => !$exposed ? $this->t('Min') : $this->exposedInfo()['label'],
         '#size' => 30,
         '#default_value' => $this->value['min'],
         '#description' => !$exposed ? '' : $this->exposedInfo()['description']
-      );
-      $form['value']['max'] = array(
+      ];
+      $form['value']['max'] = [
         '#type' => 'textfield',
         '#title' => !$exposed ? $this->t('And max') : $this->t('And'),
         '#size' => 30,
         '#default_value' => $this->value['max'],
-      );
+      ];
       if ($which == 'all') {
-        $states = array();
+        $states = [];
         // Setup #states for all operators with two values.
         foreach ($this->operatorValues(2) as $operator) {
-          $states['#states']['visible'][] = array(
-            $source => array('value' => $operator),
-          );
+          $states['#states']['visible'][] = [
+            $source => ['value' => $operator],
+          ];
         }
         $form['value']['min'] += $states;
         $form['value']['max'] += $states;
@@ -225,10 +225,10 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
 
       if (!isset($form['value'])) {
         // Ensure there is something in the 'value'.
-        $form['value'] = array(
+        $form['value'] = [
           '#type' => 'value',
           '#value' => NULL
-        );
+        ];
       }
     }
   }
@@ -245,10 +245,10 @@ public function query() {
 
   protected function opBetween($field) {
     if ($this->operator == 'between') {
-      $this->query->addWhere($this->options['group'], $field, array($this->value['min'], $this->value['max']), 'BETWEEN');
+      $this->query->addWhere($this->options['group'], $field, [$this->value['min'], $this->value['max']], 'BETWEEN');
     }
     else {
-      $this->query->addWhere($this->options['group'], $field, array($this->value['min'], $this->value['max']), 'NOT BETWEEN');
+      $this->query->addWhere($this->options['group'], $field, [$this->value['min'], $this->value['max']], 'NOT BETWEEN');
     }
   }
 
@@ -288,7 +288,7 @@ public function adminSummary() {
     $options = $this->operatorOptions('short');
     $output = $options[$this->operator];
     if (in_array($this->operator, $this->operatorValues(2))) {
-      $output .= ' ' . $this->t('@min and @max', array('@min' => $this->value['min'], '@max' => $this->value['max']));
+      $output .= ' ' . $this->t('@min and @max', ['@min' => $this->value['min'], '@max' => $this->value['max']]);
     }
     elseif (in_array($this->operator, $this->operatorValues(1))) {
       $output .= ' ' . $this->value['value'];
@@ -309,9 +309,9 @@ public function acceptExposedInput($input) {
     if (!empty($this->options['expose']['identifier'])) {
       $value = &$input[$this->options['expose']['identifier']];
       if (!is_array($value)) {
-        $value = array(
+        $value = [
           'value' => $value,
-        );
+        ];
       }
     }
 
diff --git a/core/modules/views/src/Plugin/views/filter/StringFilter.php b/core/modules/views/src/Plugin/views/filter/StringFilter.php
index 68739c372087d41cc52aa8cd407160fb9f57de4f..d55fe69d6880e4cb7b1fd04250ccddad53c7d7d4 100644
--- a/core/modules/views/src/Plugin/views/filter/StringFilter.php
+++ b/core/modules/views/src/Plugin/views/filter/StringFilter.php
@@ -26,7 +26,7 @@ class StringFilter extends FilterPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['expose']['contains']['required'] = array('default' => FALSE);
+    $options['expose']['contains']['required'] = ['default' => FALSE];
 
     return $options;
   }
@@ -37,102 +37,102 @@ protected function defineOptions() {
    * adding/removing items from this array.
    */
   function operators() {
-    $operators = array(
-      '=' => array(
+    $operators = [
+      '=' => [
         'title' => $this->t('Is equal to'),
         'short' => $this->t('='),
         'method' => 'opEqual',
         'values' => 1,
-      ),
-      '!=' => array(
+      ],
+      '!=' => [
         'title' => $this->t('Is not equal to'),
         'short' => $this->t('!='),
         'method' => 'opEqual',
         'values' => 1,
-      ),
-      'contains' => array(
+      ],
+      'contains' => [
         'title' => $this->t('Contains'),
         'short' => $this->t('contains'),
         'method' => 'opContains',
         'values' => 1,
-      ),
-      'word' => array(
+      ],
+      'word' => [
         'title' => $this->t('Contains any word'),
         'short' => $this->t('has word'),
         'method' => 'opContainsWord',
         'values' => 1,
-      ),
-      'allwords' => array(
+      ],
+      'allwords' => [
         'title' => $this->t('Contains all words'),
         'short' => $this->t('has all'),
         'method' => 'opContainsWord',
         'values' => 1,
-      ),
-      'starts' => array(
+      ],
+      'starts' => [
         'title' => $this->t('Starts with'),
         'short' => $this->t('begins'),
         'method' => 'opStartsWith',
         'values' => 1,
-      ),
-      'not_starts' => array(
+      ],
+      'not_starts' => [
         'title' => $this->t('Does not start with'),
         'short' => $this->t('not_begins'),
         'method' => 'opNotStartsWith',
         'values' => 1,
-      ),
-      'ends' => array(
+      ],
+      'ends' => [
         'title' => $this->t('Ends with'),
         'short' => $this->t('ends'),
         'method' => 'opEndsWith',
         'values' => 1,
-      ),
-      'not_ends' => array(
+      ],
+      'not_ends' => [
         'title' => $this->t('Does not end with'),
         'short' => $this->t('not_ends'),
         'method' => 'opNotEndsWith',
         'values' => 1,
-      ),
-      'not' => array(
+      ],
+      'not' => [
         'title' => $this->t('Does not contain'),
         'short' => $this->t('!has'),
         'method' => 'opNotLike',
         'values' => 1,
-      ),
-      'shorterthan' => array(
+      ],
+      'shorterthan' => [
         'title' => $this->t('Length is shorter than'),
         'short' => $this->t('shorter than'),
         'method' => 'opShorterThan',
         'values' => 1,
-      ),
-      'longerthan' => array(
+      ],
+      'longerthan' => [
         'title' => $this->t('Length is longer than'),
         'short' => $this->t('longer than'),
         'method' => 'opLongerThan',
         'values' => 1,
-      ),
-      'regular_expression' => array(
+      ],
+      'regular_expression' => [
         'title' => $this->t('Regular expression'),
         'short' => $this->t('regex'),
         'method' => 'opRegex',
         'values' => 1,
-      ),
-    );
+      ],
+    ];
     // if the definition allows for the empty operator, add it.
     if (!empty($this->definition['allow empty'])) {
-      $operators += array(
-        'empty' => array(
+      $operators += [
+        'empty' => [
           'title' => $this->t('Is empty (NULL)'),
           'method' => 'opEmpty',
           'short' => $this->t('empty'),
           'values' => 0,
-        ),
-        'not empty' => array(
+        ],
+        'not empty' => [
           'title' => $this->t('Is not empty (NOT NULL)'),
           'method' => 'opEmpty',
           'short' => $this->t('not empty'),
           'values' => 0,
-        ),
-      );
+        ],
+      ];
     }
 
     return $operators;
@@ -142,7 +142,7 @@ function operators() {
    * Build strings from the operators() for 'select' options
    */
   public function operatorOptions($which = 'title') {
-    $options = array();
+    $options = [];
     foreach ($this->operators() as $id => $info) {
       $options[$id] = $info[$which];
     }
@@ -170,7 +170,7 @@ public function adminSummary() {
   }
 
   protected function operatorValues($values = 1) {
-    $options = array();
+    $options = [];
     foreach ($this->operators() as $id => $info) {
       if (isset($info['values']) && $info['values'] == $values) {
         $options[] = $id;
@@ -205,12 +205,12 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
     }
 
     if ($which == 'all' || $which == 'value') {
-      $form['value'] = array(
+      $form['value'] = [
         '#type' => 'textfield',
         '#title' => $this->t('Value'),
         '#size' => 30,
         '#default_value' => $this->value,
-      );
+      ];
       $user_input = $form_state->getUserInput();
       if ($exposed && !isset($user_input[$identifier])) {
         $user_input[$identifier] = $this->value;
@@ -220,19 +220,19 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
       if ($which == 'all') {
         // Setup #states for all operators with one value.
         foreach ($this->operatorValues(1) as $operator) {
-          $form['value']['#states']['visible'][] = array(
-            $source => array('value' => $operator),
-          );
+          $form['value']['#states']['visible'][] = [
+            $source => ['value' => $operator],
+          ];
         }
       }
     }
 
     if (!isset($form['value'])) {
       // Ensure there is something in the 'value'.
-      $form['value'] = array(
+      $form['value'] = [
         '#type' => 'value',
         '#value' => NULL
-      );
+      ];
     }
   }
 
@@ -282,7 +282,7 @@ protected function opContainsWord($field) {
         $phrase = TRUE;
       }
       $words = trim($match[2], ',?!();:-');
-      $words = $phrase ? array($words) : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
+      $words = $phrase ? [$words] : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
       foreach ($words as $word) {
         $where->condition($field, '%' . db_like(trim($word, " ,!?")) . '%', 'LIKE');
       }
@@ -321,14 +321,14 @@ protected function opShorterThan($field) {
     $placeholder = $this->placeholder();
     // Type cast the argument to an integer because the SQLite database driver
     // has to do some specific alterations to the query base on that data type.
-    $this->query->addWhereExpression($this->options['group'], "LENGTH($field) < $placeholder", array($placeholder => (int) $this->value));
+    $this->query->addWhereExpression($this->options['group'], "LENGTH($field) < $placeholder", [$placeholder => (int) $this->value]);
   }
 
   protected function opLongerThan($field) {
     $placeholder = $this->placeholder();
     // Type cast the argument to an integer because the SQLite database driver
     // has to do some specific alterations to the query base on that data type.
-    $this->query->addWhereExpression($this->options['group'], "LENGTH($field) > $placeholder", array($placeholder => (int) $this->value));
+    $this->query->addWhereExpression($this->options['group'], "LENGTH($field) > $placeholder", [$placeholder => (int) $this->value]);
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/join/JoinPluginBase.php b/core/modules/views/src/Plugin/views/join/JoinPluginBase.php
index 37c1e064b7bb5abb330d6982448c8d163dd50585..0aa6aa3b679eee1571b849aa362eaae20b47dc9d 100644
--- a/core/modules/views/src/Plugin/views/join/JoinPluginBase.php
+++ b/core/modules/views/src/Plugin/views/join/JoinPluginBase.php
@@ -191,7 +191,7 @@ class JoinPluginBase extends PluginBase implements JoinPluginInterface {
    *
    * @see \Drupal\views\Plugin\views\join\JoinPluginBase::initJoin()
    */
-  public $configuration = array();
+  public $configuration = [];
 
   /**
    * How all the extras will be combined. Either AND or OR.
@@ -223,10 +223,10 @@ class JoinPluginBase extends PluginBase implements JoinPluginInterface {
   public function __construct(array $configuration, $plugin_id, $plugin_definition) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
     // Merge in some default values.
-    $configuration += array(
+    $configuration += [
       'type' => 'LEFT',
       'extra_operator' => 'AND'
-    );
+    ];
     $this->configuration = $configuration;
 
     if (!empty($configuration['table'])) {
@@ -270,17 +270,17 @@ public function buildJoin($select_query, $table, $view_query) {
     }
 
     $condition = "$left_field = $table[alias].$this->field";
-    $arguments = array();
+    $arguments = [];
 
     // Tack on the extra.
     if (isset($this->extra)) {
       if (is_array($this->extra)) {
-        $extras = array();
+        $extras = [];
         foreach ($this->extra as $info) {
           // Do not require 'value' to be set; allow for field syntax instead.
-          $info += array(
+          $info += [
             'value' => NULL,
-          );
+          ];
           // Figure out the table name. Remember, only use aliases provided
           // if at all possible.
           $join_table = '';
diff --git a/core/modules/views/src/Plugin/views/join/Subquery.php b/core/modules/views/src/Plugin/views/join/Subquery.php
index fa2e421b8f2dc8ea8a24d0de5d1912860eede391..f407ffce33d24760e9bf4850ebe0add0e9b0912c 100644
--- a/core/modules/views/src/Plugin/views/join/Subquery.php
+++ b/core/modules/views/src/Plugin/views/join/Subquery.php
@@ -48,14 +48,14 @@ public function buildJoin($select_query, $table, $view_query) {
 
     // Add our join condition, using a subquery on the left instead of a field.
     $condition = "($this->left_query) = $table[alias].$this->field";
-    $arguments = array();
+    $arguments = [];
 
     // Tack on the extra.
     // This is just copied verbatim from the parent class, which itself has a
     //   bug: https://www.drupal.org/node/1118100.
     if (isset($this->extra)) {
       if (is_array($this->extra)) {
-        $extras = array();
+        $extras = [];
         foreach ($this->extra as $info) {
           // Figure out the table name. Remember, only use aliases provided
           // if at all possible.
diff --git a/core/modules/views/src/Plugin/views/pager/Full.php b/core/modules/views/src/Plugin/views/pager/Full.php
index 76e646974f61fb840a7bbc34bc20352ef38cc804..7d3adae63c0e0861c7462af1eac25950a5f8a43a 100644
--- a/core/modules/views/src/Plugin/views/pager/Full.php
+++ b/core/modules/views/src/Plugin/views/pager/Full.php
@@ -27,10 +27,10 @@ protected function defineOptions() {
     $options = parent::defineOptions();
 
     // Use the same default quantity that core uses by default.
-    $options['quantity'] = array('default' => 9);
+    $options['quantity'] = ['default' => 9];
 
-    $options['tags']['contains']['first'] = array('default' => $this->t('« First'));
-    $options['tags']['contains']['last'] = array('default' => $this->t('Last »'));
+    $options['tags']['contains']['first'] = ['default' => $this->t('« First')];
+    $options['tags']['contains']['last'] = ['default' => $this->t('Last »')];
 
     return $options;
   }
@@ -41,26 +41,26 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['quantity'] = array(
+    $form['quantity'] = [
       '#type' => 'number',
       '#title' => $this->t('Number of pager links visible'),
       '#description' => $this->t('Specify the number of links to pages to display in the pager.'),
       '#default_value' => $this->options['quantity'],
-    );
+    ];
 
-    $form['tags']['first'] = array(
+    $form['tags']['first'] = [
       '#type' => 'textfield',
       '#title' => $this->t('First page link text'),
       '#default_value' => $this->options['tags']['first'],
       '#weight' => -10,
-    );
+    ];
 
-    $form['tags']['last'] = array(
+    $form['tags']['last'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Last page link text'),
       '#default_value' => $this->options['tags']['last'],
       '#weight' => 10,
-    );
+    ];
   }
 
   /**
@@ -68,9 +68,9 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    */
   public function summaryTitle() {
     if (!empty($this->options['offset'])) {
-      return $this->formatPlural($this->options['items_per_page'], '@count item, skip @skip', 'Paged, @count items, skip @skip', array('@count' => $this->options['items_per_page'], '@skip' => $this->options['offset']));
+      return $this->formatPlural($this->options['items_per_page'], '@count item, skip @skip', 'Paged, @count items, skip @skip', ['@count' => $this->options['items_per_page'], '@skip' => $this->options['offset']]);
     }
-    return $this->formatPlural($this->options['items_per_page'], '@count item', 'Paged, @count items', array('@count' => $this->options['items_per_page']));
+    return $this->formatPlural($this->options['items_per_page'], '@count item', 'Paged, @count items', ['@count' => $this->options['items_per_page']]);
   }
 
   /**
@@ -79,20 +79,20 @@ public function summaryTitle() {
   public function render($input) {
     // The 0, 1, 3, 4 indexes are correct. See the template_preprocess_pager()
     // documentation.
-    $tags = array(
+    $tags = [
       0 => $this->options['tags']['first'],
       1 => $this->options['tags']['previous'],
       3 => $this->options['tags']['next'],
       4 => $this->options['tags']['last'],
-    );
-    return array(
+    ];
+    return [
       '#theme' => $this->themeFunctions(),
       '#tags' => $tags,
       '#element' => $this->options['id'],
       '#parameters' => $input,
       '#quantity' => $this->options['quantity'],
       '#route_name' => !empty($this->view->live_preview) ? '<current>' : '<none>',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/pager/Mini.php b/core/modules/views/src/Plugin/views/pager/Mini.php
index c6520f4fb601fd12e61f5e9874824ea50eb3df11..f92f193b15ac49a1d077bf446a78107422908018 100644
--- a/core/modules/views/src/Plugin/views/pager/Mini.php
+++ b/core/modules/views/src/Plugin/views/pager/Mini.php
@@ -36,9 +36,9 @@ public function defineOptions() {
    */
   public function summaryTitle() {
     if (!empty($this->options['offset'])) {
-      return $this->formatPlural($this->options['items_per_page'], 'Mini pager, @count item, skip @skip', 'Mini pager, @count items, skip @skip', array('@count' => $this->options['items_per_page'], '@skip' => $this->options['offset']));
+      return $this->formatPlural($this->options['items_per_page'], 'Mini pager, @count item, skip @skip', 'Mini pager, @count items, skip @skip', ['@count' => $this->options['items_per_page'], '@skip' => $this->options['offset']]);
     }
-    return $this->formatPlural($this->options['items_per_page'], 'Mini pager, @count item', 'Mini pager, @count items', array('@count' => $this->options['items_per_page']));
+    return $this->formatPlural($this->options['items_per_page'], 'Mini pager, @count item', 'Mini pager, @count items', ['@count' => $this->options['items_per_page']]);
   }
 
   /**
@@ -89,17 +89,17 @@ public function postExecute(&$result) {
    */
   public function render($input) {
     // The 1, 3 indexes are correct, see template_preprocess_pager().
-    $tags = array(
+    $tags = [
       1 => $this->options['tags']['previous'],
       3 => $this->options['tags']['next'],
-    );
-    return array(
+    ];
+    return [
       '#theme' => $this->themeFunctions(),
       '#tags' => $tags,
       '#element' => $this->options['id'],
       '#parameters' => $input,
       '#route_name' => !empty($this->view->live_preview) ? '<current>' : '<none>',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/pager/None.php b/core/modules/views/src/Plugin/views/pager/None.php
index e5dcecdef890c637cd28f1e58697932da19a3595..ae2891a27db7c9322b9d882996dbd7a944311b16 100644
--- a/core/modules/views/src/Plugin/views/pager/None.php
+++ b/core/modules/views/src/Plugin/views/pager/None.php
@@ -32,14 +32,14 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
   public function summaryTitle() {
     if (!empty($this->options['offset'])) {
-      return $this->t('All items, skip @skip', array('@skip' => $this->options['offset']));
+      return $this->t('All items, skip @skip', ['@skip' => $this->options['offset']]);
     }
     return $this->t('All items');
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['offset'] = array('default' => 0);
+    $options['offset'] = ['default' => 0];
 
     return $options;
   }
@@ -49,12 +49,12 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['offset'] = array(
+    $form['offset'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Offset (number of items to skip)'),
       '#description' => $this->t('For example, set this to 3 and the first 3 items will not be displayed.'),
       '#default_value' => $this->options['offset'],
-    );
+    ];
   }
 
   public function usePager() {
diff --git a/core/modules/views/src/Plugin/views/pager/Some.php b/core/modules/views/src/Plugin/views/pager/Some.php
index ef7f65d84375e845813e430522687e6f20d291c1..59edaea082b349655b8dab1a99ef07325d095577 100644
--- a/core/modules/views/src/Plugin/views/pager/Some.php
+++ b/core/modules/views/src/Plugin/views/pager/Some.php
@@ -20,15 +20,15 @@ class Some extends PagerPluginBase {
 
   public function summaryTitle() {
     if (!empty($this->options['offset'])) {
-      return $this->formatPlural($this->options['items_per_page'], '@count item, skip @skip', '@count items, skip @skip', array('@count' => $this->options['items_per_page'], '@skip' => $this->options['offset']));
+      return $this->formatPlural($this->options['items_per_page'], '@count item, skip @skip', '@count items, skip @skip', ['@count' => $this->options['items_per_page'], '@skip' => $this->options['offset']]);
     }
-    return $this->formatPlural($this->options['items_per_page'], '@count item', '@count items', array('@count' => $this->options['items_per_page']));
+    return $this->formatPlural($this->options['items_per_page'], '@count item', '@count items', ['@count' => $this->options['items_per_page']]);
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['items_per_page'] = array('default' => 10);
-    $options['offset'] = array('default' => 0);
+    $options['items_per_page'] = ['default' => 10];
+    $options['offset'] = ['default' => 0];
 
     return $options;
   }
@@ -39,19 +39,19 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
     $pager_text = $this->displayHandler->getPagerText();
-    $form['items_per_page'] = array(
+    $form['items_per_page'] = [
       '#title' => $pager_text['items per page title'],
       '#type' => 'textfield',
       '#description' => $pager_text['items per page description'],
       '#default_value' => $this->options['items_per_page'],
-    );
+    ];
 
-    $form['offset'] = array(
+    $form['offset'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Offset (number of items to skip)'),
       '#description' => $this->t('For example, set this to 3 and the first 3 items will not be displayed.'),
       '#default_value' => $this->options['offset'],
-    );
+    ];
   }
 
   public function usePager() {
diff --git a/core/modules/views/src/Plugin/views/pager/SqlBase.php b/core/modules/views/src/Plugin/views/pager/SqlBase.php
index 0154762c07c3962d18ed2ccc2f831d405b9944ff..46daeb7ed7167664f22ab082f6035fb5e699527e 100644
--- a/core/modules/views/src/Plugin/views/pager/SqlBase.php
+++ b/core/modules/views/src/Plugin/views/pager/SqlBase.php
@@ -13,28 +13,28 @@ abstract class SqlBase extends PagerPluginBase implements CacheableDependencyInt
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['items_per_page'] = array('default' => 10);
-    $options['offset'] = array('default' => 0);
-    $options['id'] = array('default' => 0);
-    $options['total_pages'] = array('default' => '');
-    $options['expose'] = array(
-      'contains' => array(
-        'items_per_page' => array('default' => FALSE),
-        'items_per_page_label' => array('default' => $this->t('Items per page')),
-        'items_per_page_options' => array('default' => '5, 10, 25, 50'),
-        'items_per_page_options_all' => array('default' => FALSE),
-        'items_per_page_options_all_label' => array('default' => $this->t('- All -')),
-
-        'offset' => array('default' => FALSE),
-        'offset_label' => array('default' => $this->t('Offset')),
-      ),
-    );
-    $options['tags'] = array(
-      'contains' => array(
-        'previous' => array('default' => $this->t('‹ Previous')),
-        'next' => array('default' => $this->t('Next ›')),
-      ),
-    );
+    $options['items_per_page'] = ['default' => 10];
+    $options['offset'] = ['default' => 0];
+    $options['id'] = ['default' => 0];
+    $options['total_pages'] = ['default' => ''];
+    $options['expose'] = [
+      'contains' => [
+        'items_per_page' => ['default' => FALSE],
+        'items_per_page_label' => ['default' => $this->t('Items per page')],
+        'items_per_page_options' => ['default' => '5, 10, 25, 50'],
+        'items_per_page_options_all' => ['default' => FALSE],
+        'items_per_page_options_all_label' => ['default' => $this->t('- All -')],
+
+        'offset' => ['default' => FALSE],
+        'offset_label' => ['default' => $this->t('Offset')],
+      ],
+    ];
+    $options['tags'] = [
+      'contains' => [
+        'previous' => ['default' => $this->t('‹ Previous')],
+        'next' => ['default' => $this->t('Next ›')],
+      ],
+    ];
     return $options;
   }
 
@@ -44,135 +44,135 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
     $pager_text = $this->displayHandler->getPagerText();
-    $form['items_per_page'] = array(
+    $form['items_per_page'] = [
       '#title' => $pager_text['items per page title'],
       '#type' => 'number',
       '#description' => $pager_text['items per page description'],
       '#default_value' => $this->options['items_per_page'],
-    );
+    ];
 
-    $form['offset'] = array(
+    $form['offset'] = [
       '#type' => 'number',
       '#title' => $this->t('Offset (number of items to skip)'),
       '#description' => $this->t('For example, set this to 3 and the first 3 items will not be displayed.'),
       '#default_value' => $this->options['offset'],
-    );
+    ];
 
-    $form['id'] = array(
+    $form['id'] = [
       '#type' => 'number',
       '#title' => $this->t('Pager ID'),
       '#description' => $this->t("Unless you're experiencing problems with pagers related to this view, you should leave this at 0. If using multiple pagers on one page you may need to set this number to a higher value so as not to conflict within the ?page= array. Large values will add a lot of commas to your URLs, so avoid if possible."),
       '#default_value' => $this->options['id'],
-    );
+    ];
 
-    $form['total_pages'] = array(
+    $form['total_pages'] = [
       '#type' => 'number',
       '#title' => $this->t('Number of pages'),
       '#description' => $this->t('Leave empty to show all pages.'),
       '#default_value' => $this->options['total_pages'],
-    );
+    ];
 
-    $form['tags'] = array(
+    $form['tags'] = [
       '#type' => 'details',
       '#open' => TRUE,
       '#tree' => TRUE,
       '#title' => $this->t('Pager link labels'),
       '#input' => TRUE,
-    );
+    ];
 
-    $form['tags']['previous'] = array(
+    $form['tags']['previous'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Previous page link text'),
       '#default_value' => $this->options['tags']['previous'],
-    );
+    ];
 
-    $form['tags']['next'] = array(
+    $form['tags']['next'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Next page link text'),
       '#default_value' => $this->options['tags']['next'],
-    );
+    ];
 
-    $form['expose'] = array(
+    $form['expose'] = [
       '#type' => 'details',
       '#open' => TRUE,
       '#tree' => TRUE,
       '#title' => $this->t('Exposed options'),
       '#input' => TRUE,
       '#description' => $this->t('Allow user to control selected display options for this view.'),
-    );
+    ];
 
-    $form['expose']['items_per_page'] = array(
+    $form['expose']['items_per_page'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow user to control the number of items displayed in this view'),
       '#default_value' => $this->options['expose']['items_per_page'],
-    );
+    ];
 
-    $form['expose']['items_per_page_label'] = array(
+    $form['expose']['items_per_page_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Items per page label'),
       '#required' => TRUE,
       '#default_value' => $this->options['expose']['items_per_page_label'],
-      '#states' => array(
-        'invisible' => array(
-          'input[name="pager_options[expose][items_per_page]"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
-
-    $form['expose']['items_per_page_options'] = array(
+      '#states' => [
+        'invisible' => [
+          'input[name="pager_options[expose][items_per_page]"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
+
+    $form['expose']['items_per_page_options'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Exposed items per page options'),
       '#required' => TRUE,
       '#description' => $this->t('Set between which values the user can choose when determining the items per page. Separated by comma.'),
       '#default_value' => $this->options['expose']['items_per_page_options'],
-      '#states' => array(
-        'invisible' => array(
-          'input[name="pager_options[expose][items_per_page]"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
+      '#states' => [
+        'invisible' => [
+          'input[name="pager_options[expose][items_per_page]"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
 
 
-    $form['expose']['items_per_page_options_all'] = array(
+    $form['expose']['items_per_page_options_all'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow user to display all items'),
       '#default_value' => $this->options['expose']['items_per_page_options_all'],
-    );
+    ];
 
-    $form['expose']['items_per_page_options_all_label'] = array(
+    $form['expose']['items_per_page_options_all_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('All items label'),
       '#default_value' => $this->options['expose']['items_per_page_options_all_label'],
-      '#states' => array(
-        'invisible' => array(
-          'input[name="pager_options[expose][items_per_page_options_all]"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
-
-    $form['expose']['offset'] = array(
+      '#states' => [
+        'invisible' => [
+          'input[name="pager_options[expose][items_per_page_options_all]"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
+
+    $form['expose']['offset'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Allow user to specify number of items skipped from beginning of this view.'),
       '#default_value' => $this->options['expose']['offset'],
-    );
+    ];
 
-    $form['expose']['offset_label'] = array(
+    $form['expose']['offset_label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Offset label'),
       '#required' => TRUE,
       '#default_value' => $this->options['expose']['offset_label'],
-      '#states' => array(
-        'invisible' => array(
-          'input[name="pager_options[expose][offset]"]' => array('checked' => FALSE),
-        ),
-      ),
-    );
+      '#states' => [
+        'invisible' => [
+          'input[name="pager_options[expose][offset]"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
   }
 
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
     // Only accept integer values.
     $error = FALSE;
-    $exposed_options = $form_state->getValue(array('pager_options', 'expose', 'items_per_page_options'));
+    $exposed_options = $form_state->getValue(['pager_options', 'expose', 'items_per_page_options']);
     if (strpos($exposed_options, '.') !== FALSE) {
       $error = TRUE;
     }
@@ -192,11 +192,11 @@ public function validateOptionsForm(&$form, FormStateInterface $form_state) {
     }
 
     // Make sure that the items_per_page is part of the expose settings.
-    if (!$form_state->isValueEmpty(array('pager_options', 'expose', 'items_per_page')) && !$form_state->isValueEmpty(array('pager_options', 'items_per_page'))) {
-      $items_per_page = $form_state->getValue(array('pager_options', 'items_per_page'));
+    if (!$form_state->isValueEmpty(['pager_options', 'expose', 'items_per_page']) && !$form_state->isValueEmpty(['pager_options', 'items_per_page'])) {
+      $items_per_page = $form_state->getValue(['pager_options', 'items_per_page']);
       if (array_search($items_per_page, $options) === FALSE) {
         $form_state->setErrorByName('pager_options][expose][items_per_page_options', $this->t("The <em>Exposed items per page</em> field's options must include the value from the <em>Items per page</em> field (@items_per_page).",
-          array('@items_per_page' => $items_per_page))
+          ['@items_per_page' => $items_per_page])
         );
       }
     }
@@ -253,13 +253,13 @@ public function setCurrentPage($number = NULL) {
     global $pager_page_array;
 
     if (empty($pager_page_array)) {
-      $pager_page_array = array();
+      $pager_page_array = [];
     }
 
     // Fill in missing values in the global page array, in case the global page
     // array hasn't been initialized before.
     $page = $this->view->getRequest()->query->get('page');
-    $page = isset($page) ? explode(',', $page) : array();
+    $page = isset($page) ? explode(',', $page) : [];
 
     for ($i = 0; $i <= $this->options['id'] || $i < count($pager_page_array); $i++) {
       $pager_page_array[$i] = empty($page[$i]) ? 0 : $page[$i];
@@ -331,7 +331,7 @@ protected function isOffsetExposed() {
   public function exposedFormAlter(&$form, FormStateInterface $form_state) {
     if ($this->itemsPerPageExposed()) {
       $options = explode(',', $this->options['expose']['items_per_page_options']);
-      $sanitized_options = array();
+      $sanitized_options = [];
       if (is_array($options)) {
         foreach ($options as $option) {
           $sanitized_options[intval($option)] = intval($option);
@@ -339,23 +339,23 @@ public function exposedFormAlter(&$form, FormStateInterface $form_state) {
         if (!empty($this->options['expose']['items_per_page_options_all']) && !empty($this->options['expose']['items_per_page_options_all_label'])) {
           $sanitized_options['All'] = $this->options['expose']['items_per_page_options_all_label'];
         }
-        $form['items_per_page'] = array(
+        $form['items_per_page'] = [
           '#type' => 'select',
           '#title' => $this->options['expose']['items_per_page_label'],
           '#options' => $sanitized_options,
           '#default_value' => $this->getItemsPerPage(),
-        );
+        ];
       }
     }
 
     if ($this->isOffsetExposed()) {
-      $form['offset'] = array(
+      $form['offset'] = [
         '#type' => 'textfield',
         '#size' => 10,
         '#maxlength' => 10,
         '#title' => $this->options['expose']['offset_label'],
         '#default_value' => $this->getOffset(),
-      );
+      ];
     }
   }
 
diff --git a/core/modules/views/src/Plugin/views/query/QueryPluginBase.php b/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
index d4e1b23cc7845bbd4a19a2d7b19336f3f716afb1..3f9535e26093a52314845ee7915e3b7a3f16fa0c 100644
--- a/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
+++ b/core/modules/views/src/Plugin/views/query/QueryPluginBase.php
@@ -173,7 +173,7 @@ public function setWhereGroup($type = 'AND', $group = NULL, $where = 'where') {
 
     // Create an empty group
     if (empty($groups[$group])) {
-      $groups[$group] = array('conditions' => array(), 'args' => array());
+      $groups[$group] = ['conditions' => [], 'args' => []];
     }
 
     $groups[$group]['type'] = strtoupper($type);
@@ -261,19 +261,19 @@ public function getDateFormat($field, $format, $string_date = FALSE) {
    */
   public function getEntityTableInfo() {
     // Start with the base table.
-    $entity_tables = array();
+    $entity_tables = [];
     $views_data = Views::viewsData();
     $base_table = $this->view->storage->get('base_table');
     $base_table_data = $views_data->get($base_table);
 
     if (isset($base_table_data['table']['entity type'])) {
-      $entity_tables[$base_table_data['table']['entity type']] = array(
+      $entity_tables[$base_table_data['table']['entity type']] = [
         'base' => $base_table,
         'alias' => $base_table,
         'relationship_id' => 'none',
         'entity_type' => $base_table_data['table']['entity type'],
         'revision' => $base_table_data['table']['entity revision'],
-      );
+      ];
 
       // Include the entity provider.
       if (!empty($base_table_data['table']['provider'])) {
@@ -293,13 +293,13 @@ public function getEntityTableInfo() {
           continue;
         }
 
-        $entity_tables[$relationship_id . '__' . $relationship->tableAlias] = array(
+        $entity_tables[$relationship_id . '__' . $relationship->tableAlias] = [
           'base' => $relationship->definition['base'],
           'relationship_id' => $relationship_id,
           'alias' => $relationship->alias,
           'entity_type' => $table_data['table']['entity type'],
           'revision' => $table_data['table']['entity revision'],
-        );
+        ];
 
         // Include the entity provider.
         if (!empty($table_data['table']['provider'])) {
diff --git a/core/modules/views/src/Plugin/views/query/Sql.php b/core/modules/views/src/Plugin/views/query/Sql.php
index 9252b6cb03a926cadae3c1d030941018a2407de7..ab056f59a71957927f43947f3d261380023e60f9 100644
--- a/core/modules/views/src/Plugin/views/query/Sql.php
+++ b/core/modules/views/src/Plugin/views/query/Sql.php
@@ -33,31 +33,31 @@ class Sql extends QueryPluginBase {
   /**
    * A list of tables in the order they should be added, keyed by alias.
    */
-  protected $tableQueue = array();
+  protected $tableQueue = [];
 
   /**
    * Holds an array of tables and counts added so that we can create aliases
    */
-  public $tables = array();
+  public $tables = [];
 
   /**
    * Holds an array of relationships, which are aliases of the primary
    * table that represent different ways to join the same table in.
    */
-  public $relationships = array();
+  public $relationships = [];
 
   /**
    * An array of sections of the WHERE query. Each section is in itself
    * an array of pieces and a flag as to whether or not it should be AND
    * or OR.
    */
-  public $where = array();
+  public $where = [];
   /**
    * An array of sections of the HAVING query. Each section is in itself
    * an array of pieces and a flag as to whether or not it should be AND
    * or OR.
    */
-  public $having = array();
+  public $having = [];
   /**
    * The default operator to use when connecting the WHERE groups. May be
    * AND or OR.
@@ -67,18 +67,18 @@ class Sql extends QueryPluginBase {
   /**
    * A simple array of order by clauses.
    */
-  public $orderby = array();
+  public $orderby = [];
 
   /**
    * A simple array of group by clauses.
    */
-  public $groupby = array();
+  public $groupby = [];
 
 
   /**
    * An array of fields.
    */
-  public $fields = array();
+  public $fields = [];
 
   /**
    * A flag as to whether or not to make the primary field distinct.
@@ -95,12 +95,12 @@ class Sql extends QueryPluginBase {
   /**
    * An array mapping table aliases and field names to field aliases.
    */
-  protected $fieldAliases = array();
+  protected $fieldAliases = [];
 
   /**
    * Query tags which will be passed over to the dbtng query object.
    */
-  public $tags = array();
+  public $tags = [];
 
   /**
    * Is the view marked as not distinct.
@@ -151,33 +151,33 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
 
     $base_table = $this->view->storage->get('base_table');
     $base_field = $this->view->storage->get('base_field');
-    $this->relationships[$base_table] = array(
+    $this->relationships[$base_table] = [
       'link' => NULL,
       'table' => $base_table,
       'alias' => $base_table,
       'base' => $base_table
-    );
+    ];
 
     // init the table queue with our primary table.
-    $this->tableQueue[$base_table] = array(
+    $this->tableQueue[$base_table] = [
       'alias' => $base_table,
       'table' => $base_table,
       'relationship' => $base_table,
       'join' => NULL,
-    );
+    ];
 
     // init the tables with our primary table
-    $this->tables[$base_table][$base_table] = array(
+    $this->tables[$base_table][$base_table] = [
       'count' => 1,
       'alias' => $base_table,
-    );
+    ];
 
-    $this->count_field = array(
+    $this->count_field = [
       'table' => $base_table,
       'field' => $base_field,
       'alias' => $base_field,
       'count' => TRUE,
-    );
+    ];
   }
 
   /**
@@ -199,31 +199,31 @@ public function setCountField($table, $field, $alias = NULL) {
     if (empty($alias)) {
       $alias = $table . '_' . $field;
     }
-    $this->count_field = array(
+    $this->count_field = [
       'table' => $table,
       'field' => $field,
       'alias' => $alias,
       'count' => TRUE,
-    );
+    ];
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['disable_sql_rewrite'] = array(
+    $options['disable_sql_rewrite'] = [
       'default' => FALSE,
-    );
-    $options['distinct'] = array(
+    ];
+    $options['distinct'] = [
       'default' => FALSE,
-    );
-    $options['replica'] = array(
+    ];
+    $options['replica'] = [
       'default' => FALSE,
-    );
-    $options['query_comment'] = array(
+    ];
+    $options['query_comment'] = [
       'default' => '',
-    );
-    $options['query_tags'] = array(
-      'default' => array(),
-    );
+    ];
+    $options['query_tags'] = [
+      'default' => [],
+    ];
 
     return $options;
   }
@@ -234,45 +234,45 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['disable_sql_rewrite'] = array(
+    $form['disable_sql_rewrite'] = [
       '#title' => $this->t('Disable SQL rewriting'),
       '#description' => $this->t('Disabling SQL rewriting will omit all query tags, i. e. disable node access checks as well as override hook_query_alter() implementations in other modules.'),
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['disable_sql_rewrite']),
       '#suffix' => '<div class="messages messages--warning sql-rewrite-warning js-hide">' . $this->t('WARNING: Disabling SQL rewriting means that node access security is disabled. This may allow users to see data they should not be able to see if your view is misconfigured. Use this option only if you understand and accept this security risk.') . '</div>',
-    );
-    $form['distinct'] = array(
+    ];
+    $form['distinct'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Distinct'),
       '#description' => $this->t('This will make the view display only distinct items. If there are multiple identical items, each will be displayed only once. You can use this to try and remove duplicates from a view, though it does not always work. Note that this can slow queries down, so use it with caution.'),
       '#default_value' => !empty($this->options['distinct']),
-    );
-    $form['replica'] = array(
+    ];
+    $form['replica'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Use Secondary Server'),
       '#description' => $this->t('This will make the query attempt to connect to a replica server if available.  If no replica server is defined or available, it will fall back to the default server.'),
       '#default_value' => !empty($this->options['replica']),
-    );
-    $form['query_comment'] = array(
+    ];
+    $form['query_comment'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Query Comment'),
       '#description' => $this->t('If set, this comment will be embedded in the query and passed to the SQL server. This can be helpful for logging or debugging.'),
       '#default_value' => $this->options['query_comment'],
-    );
-    $form['query_tags'] = array(
+    ];
+    $form['query_tags'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Query Tags'),
       '#description' => $this->t('If set, these tags will be appended to the query and can be used to identify the query in a module. This can be helpful for altering queries.'),
       '#default_value' => implode(', ', $this->options['query_tags']),
-      '#element_validate' => array('views_element_validate_tags'),
-    );
+      '#element_validate' => ['views_element_validate_tags'],
+    ];
   }
 
   /**
    * Special submit handling.
    */
   public function submitOptionsForm(&$form, FormStateInterface $form_state) {
-    $element = array('#parents' => array('query', 'options', 'query_tags'));
+    $element = ['#parents' => ['query', 'options', 'query_tags']];
     $value = explode(',', NestedArray::getValue($form_state->getValues(), $element['#parents']));
     $value = array_filter(array_map('trim', $value));
     $form_state->setValueForElement($element, $value);
@@ -328,24 +328,24 @@ public function addRelationship($alias, JoinPluginBase $join, $base, $link_point
 
     // Add the table directly to the queue to avoid accidentally marking
     // it.
-    $this->tableQueue[$alias] = array(
+    $this->tableQueue[$alias] = [
       'table' => $join->table,
       'num' => 1,
       'alias' => $alias,
       'join' => $join,
       'relationship' => $link_point,
-    );
+    ];
 
-    $this->relationships[$alias] = array(
+    $this->relationships[$alias] = [
       'link' => $link_point,
       'table' => $join->table,
       'base' => $base,
-    );
+    ];
 
-    $this->tables[$this->view->storage->get('base_table')][$alias] = array(
+    $this->tables[$this->view->storage->get('base_table')][$alias] = [
       'count' => 1,
       'alias' => $alias,
-    );
+    ];
 
     return $alias;
   }
@@ -471,13 +471,13 @@ public function queueTable($table, $relationship = NULL, JoinPluginBase $join =
       $join = $this->adjustJoin($join, $relationship);
     }
 
-    $this->tableQueue[$alias] = array(
+    $this->tableQueue[$alias] = [
       'table' => $table,
       'num' => $this->tables[$relationship][$table]['count'],
       'alias' => $alias,
       'join' => $join,
       'relationship' => $relationship,
-    );
+    ];
 
     return $alias;
   }
@@ -494,10 +494,10 @@ protected function markTable($table, $relationship, $alias) {
         }
         $alias .= $table;
       }
-      $this->tables[$relationship][$table] = array(
+      $this->tables[$relationship][$table] = [
         'count' => 1,
         'alias' => $alias,
-      );
+      ];
     }
     else {
       $this->tables[$relationship][$table]['count']++;
@@ -603,7 +603,7 @@ public function ensureTable($table, $relationship = NULL, JoinPluginBase $join =
    * query they will be added, but additional copies will NOT be added
    * if the table is already there.
    */
-  protected function ensurePath($table, $relationship = NULL, $join = NULL, $traced = array(), $add = array()) {
+  protected function ensurePath($table, $relationship = NULL, $join = NULL, $traced = [], $add = []) {
     if (!isset($relationship)) {
       $relationship = $this->view->storage->get('base_table');
     }
@@ -763,7 +763,7 @@ public function getTableInfo($table) {
    * @return string
    *   The name that this field can be referred to as. Usually this is the alias.
    */
-  public function addField($table, $field, $alias = '', $params = array()) {
+  public function addField($table, $field, $alias = '', $params = []) {
     // We check for this specifically because it gets a special alias.
     if ($table == $this->view->storage->get('base_table') && $field == $this->view->storage->get('base_field') && empty($alias)) {
       $alias = $this->view->storage->get('base_field');
@@ -788,11 +788,11 @@ public function addField($table, $field, $alias = '', $params = array()) {
     $alias = strtolower(substr($alias, 0, 60));
 
     // Create a field info array.
-    $field_info = array(
+    $field_info = [
       'field' => $field,
       'table' => $table,
       'alias' => $alias,
-    ) + $params;
+    ] + $params;
 
     // Test to see if the field is actually the same or not. Due to
     // differing parameters changing the aggregation function, we need
@@ -818,7 +818,7 @@ public function addField($table, $field, $alias = '', $params = array()) {
    * mode where we're changing the query because we didn't get data we needed.
    */
   public function clearFields() {
-    $this->fields = array();
+    $this->fields = [];
   }
 
   /**
@@ -867,11 +867,11 @@ public function addWhere($group, $field, $value = NULL, $operator = NULL) {
       $this->setWhereGroup('AND', $group);
     }
 
-    $this->where[$group]['conditions'][] = array(
+    $this->where[$group]['conditions'][] = [
       'field' => $field,
       'value' => $value,
       'operator' => $operator,
-    );
+    ];
   }
 
   /**
@@ -893,7 +893,7 @@ public function addWhere($group, $field, $value = NULL, $operator = NULL) {
    *
    * @see QueryConditionInterface::where()
    */
-  public function addWhereExpression($group, $snippet, $args = array()) {
+  public function addWhereExpression($group, $snippet, $args = []) {
     // Ensure all variants of 0 are actually 0. Thus '', 0 and NULL are all
     // the default group.
     if (empty($group)) {
@@ -905,11 +905,11 @@ public function addWhereExpression($group, $snippet, $args = array()) {
       $this->setWhereGroup('AND', $group);
     }
 
-    $this->where[$group]['conditions'][] = array(
+    $this->where[$group]['conditions'][] = [
       'field' => $snippet,
       'value' => $args,
       'operator' => 'formula',
-    );
+    ];
   }
 
   /**
@@ -930,7 +930,7 @@ public function addWhereExpression($group, $snippet, $args = array()) {
    *
    * @see QueryConditionInterface::having()
    */
-  public function addHavingExpression($group, $snippet, $args = array()) {
+  public function addHavingExpression($group, $snippet, $args = []) {
     // Ensure all variants of 0 are actually 0. Thus '', 0 and NULL are all
     // the default group.
     if (empty($group)) {
@@ -943,11 +943,11 @@ public function addHavingExpression($group, $snippet, $args = array()) {
     }
 
     // Add the clause and the args.
-    $this->having[$group]['conditions'][] = array(
+    $this->having[$group]['conditions'][] = [
       'field' => $snippet,
       'value' => $args,
       'operator' => 'formula',
-    );
+    ];
   }
 
   /**
@@ -969,7 +969,7 @@ public function addHavingExpression($group, $snippet, $args = array()) {
    * @param $params
    *   Any params that should be passed through to the addField.
    */
-  public function addOrderBy($table, $field = NULL, $order = 'ASC', $alias = '', $params = array()) {
+  public function addOrderBy($table, $field = NULL, $order = 'ASC', $alias = '', $params = []) {
     // Only ensure the table if it's not the special random key.
     // @todo: Maybe it would make sense to just add an addOrderByRand or something similar.
     if ($table && $table != 'rand') {
@@ -989,10 +989,10 @@ public function addOrderBy($table, $field = NULL, $order = 'ASC', $alias = '', $
       $as = $this->addField($table, $field, $as, $params);
     }
 
-    $this->orderby[] = array(
+    $this->orderby[] = [
       'field' => $as,
       'direction' => strtoupper($order)
-    );
+    ];
   }
 
   /**
@@ -1031,7 +1031,7 @@ public function addTag($tag) {
    * Generates a unique placeholder used in the db query.
    */
   public function placeholder($base = 'views') {
-    static $placeholders = array();
+    static $placeholders = [];
     if (!isset($placeholders[$base])) {
       $placeholders[$base] = 0;
       return ':' . $base;
@@ -1111,7 +1111,7 @@ protected function buildCondition($where = 'where') {
    *   An array of the fieldnames which are non-aggregates.
    */
   protected function getNonAggregates() {
-    $non_aggregates = array();
+    $non_aggregates = [];
     foreach ($this->fields as $field) {
       $string = '';
       if (!empty($field['table'])) {
@@ -1167,9 +1167,9 @@ protected function compileFields($query) {
 
       if (!empty($field['function'])) {
         $info = $this->getAggregationInfo();
-        if (!empty($info[$field['function']]['method']) && is_callable(array($this, $info[$field['function']]['method']))) {
+        if (!empty($info[$field['function']]['method']) && is_callable([$this, $info[$field['function']]['method']])) {
           $string = $this::{$info[$field['function']]['method']}($field['function'], $string);
-          $placeholders = !empty($field['placeholders']) ? $field['placeholders'] : array();
+          $placeholders = !empty($field['placeholders']) ? $field['placeholders'] : [];
           $query->addExpression($string, $fieldname, $placeholders);
         }
 
@@ -1177,7 +1177,7 @@ protected function compileFields($query) {
       }
       // This is a formula, using no tables.
       elseif (empty($field['table'])) {
-        $placeholders = !empty($field['placeholders']) ? $field['placeholders'] : array();
+        $placeholders = !empty($field['placeholders']) ? $field['placeholders'] : [];
         $query->addExpression($string, $fieldname, $placeholders);
       }
       elseif ($this->distinct && !in_array($fieldname, $this->groupby)) {
@@ -1228,7 +1228,7 @@ public function query($get_count = FALSE) {
       $this->getCountOptimized = TRUE;
     }
 
-    $options = array();
+    $options = [];
     $target = 'default';
     $key = 'default';
     // Detect an external database and set the
@@ -1274,7 +1274,7 @@ public function query($get_count = FALSE) {
       // Allow 'GROUP BY' even no aggregation function has been set.
       $this->hasAggregate = $this->view->display_handler->getOption('group_by');
     }
-    $groupby = array();
+    $groupby = [];
     if ($this->hasAggregate && (!empty($this->groupby) || !empty($non_aggregates))) {
       $groupby = array_unique(array_merge($this->groupby, $non_aggregates));
     }
@@ -1283,12 +1283,12 @@ public function query($get_count = FALSE) {
     // entities can be loaded.
     $entity_information = $this->getEntityTableInfo();
     if ($entity_information) {
-      $params = array();
+      $params = [];
       if ($groupby) {
         // Handle grouping, by retrieving the minimum entity_id.
-        $params = array(
+        $params = [
           'function' => 'min',
-        );
+        ];
       }
 
       foreach ($entity_information as $entity_type_id => $info) {
@@ -1347,7 +1347,7 @@ public function query($get_count = FALSE) {
     }
 
     // Add all query substitutions as metadata.
-    $query->addMetaData('views_substitutions', \Drupal::moduleHandler()->invokeAll('views_query_substitutions', array($this->view)));
+    $query->addMetaData('views_substitutions', \Drupal::moduleHandler()->invokeAll('views_query_substitutions', [$this->view]));
 
     return $query;
   }
@@ -1356,7 +1356,7 @@ public function query($get_count = FALSE) {
    * Get the arguments attached to the WHERE and HAVING clauses of this query.
    */
   public function getWhereArgs() {
-    $args = array();
+    $args = [];
     foreach ($this->where as $where) {
       $args = array_merge($args, $where['args']);
     }
@@ -1370,7 +1370,7 @@ public function getWhereArgs() {
    * Let modules modify the query just prior to finalizing it.
    */
   public function alter(ViewExecutable $view) {
-    \Drupal::moduleHandler()->invokeAll('views_query_alter', array($view, $this));
+    \Drupal::moduleHandler()->invokeAll('views_query_alter', [$view, $this]);
   }
 
   /**
@@ -1425,7 +1425,7 @@ public function execute(ViewExecutable $view) {
     }
 
     if ($query) {
-      $additional_arguments = \Drupal::moduleHandler()->invokeAll('views_query_substitutions', array($view));
+      $additional_arguments = \Drupal::moduleHandler()->invokeAll('views_query_substitutions', [$view]);
 
       // Count queries must be run through the preExecute() method.
       // If not, then hook_query_node_access_alter() may munge the count by
@@ -1481,7 +1481,7 @@ public function execute(ViewExecutable $view) {
         $this->loadEntities($view->result);
       }
       catch (DatabaseExceptionWrapper $e) {
-        $view->result = array();
+        $view->result = [];
         if (!empty($view->live_preview)) {
           drupal_set_message($e->getMessage(), 'error');
         }
@@ -1515,7 +1515,7 @@ public function loadEntities(&$results) {
     }
 
     // Extract all entity types from entity_information.
-    $entity_types = array();
+    $entity_types = [];
     foreach ($entity_information as $info) {
       $entity_type = $info['entity_type'];
       if (!isset($entity_types[$entity_type])) {
@@ -1665,82 +1665,82 @@ public function addSignature(ViewExecutable $view) {
   public function getAggregationInfo() {
     // @todo -- need a way to get database specific and customized aggregation
     // functions into here.
-    return array(
-      'group' => array(
+    return [
+      'group' => [
         'title' => $this->t('Group results together'),
         'is aggregate' => FALSE,
-      ),
-      'count' => array(
+      ],
+      'count' => [
         'title' => $this->t('Count'),
         'method' => 'aggregationMethodSimple',
-        'handler' => array(
+        'handler' => [
           'argument' => 'groupby_numeric',
           'field' => 'numeric',
           'filter' => 'groupby_numeric',
           'sort' => 'groupby_numeric',
-        ),
-      ),
-      'count_distinct' => array(
+        ],
+      ],
+      'count_distinct' => [
         'title' => $this->t('Count DISTINCT'),
         'method' => 'aggregationMethodDistinct',
-        'handler' => array(
+        'handler' => [
           'argument' => 'groupby_numeric',
           'field' => 'numeric',
           'filter' => 'groupby_numeric',
           'sort' => 'groupby_numeric',
-        ),
-      ),
-      'sum' => array(
+        ],
+      ],
+      'sum' => [
         'title' => $this->t('Sum'),
         'method' => 'aggregationMethodSimple',
-        'handler' => array(
+        'handler' => [
           'argument' => 'groupby_numeric',
           'field' => 'numeric',
           'filter' => 'groupby_numeric',
           'sort' => 'groupby_numeric',
-        ),
-      ),
-      'avg' => array(
+        ],
+      ],
+      'avg' => [
         'title' => $this->t('Average'),
         'method' => 'aggregationMethodSimple',
-        'handler' => array(
+        'handler' => [
           'argument' => 'groupby_numeric',
           'field' => 'numeric',
           'filter' => 'groupby_numeric',
           'sort' => 'groupby_numeric',
-        ),
-      ),
-      'min' => array(
+        ],
+      ],
+      'min' => [
         'title' => $this->t('Minimum'),
         'method' => 'aggregationMethodSimple',
-        'handler' => array(
+        'handler' => [
           'argument' => 'groupby_numeric',
           'field' => 'numeric',
           'filter' => 'groupby_numeric',
           'sort' => 'groupby_numeric',
-        ),
-      ),
-      'max' => array(
+        ],
+      ],
+      'max' => [
         'title' => $this->t('Maximum'),
         'method' => 'aggregationMethodSimple',
-        'handler' => array(
+        'handler' => [
           'argument' => 'groupby_numeric',
           'field' => 'numeric',
           'filter' => 'groupby_numeric',
           'sort' => 'groupby_numeric',
-        ),
-      ),
-      'stddev_pop' => array(
+        ],
+      ],
+      'stddev_pop' => [
         'title' => $this->t('Standard deviation'),
         'method' => 'aggregationMethodSimple',
-        'handler' => array(
+        'handler' => [
           'argument' => 'groupby_numeric',
           'field' => 'numeric',
           'filter' => 'groupby_numeric',
           'sort' => 'groupby_numeric',
-        ),
-      )
-    );
+        ],
+      ]
+    ];
   }
 
   public function aggregationMethodSimple($group_type, $field) {
@@ -1795,7 +1795,7 @@ public function setupTimezone() {
 
     // set up the database timezone
     $db_type = Database::getConnection()->databaseType();
-    if (in_array($db_type, array('mysql', 'pgsql'))) {
+    if (in_array($db_type, ['mysql', 'pgsql'])) {
       $offset = '+00:00';
       static $already_set = FALSE;
       if (!$already_set) {
@@ -1820,7 +1820,7 @@ public function getDateFormat($field, $format, $string_date = FALSE) {
     $db_type = Database::getConnection()->databaseType();
     switch ($db_type) {
       case 'mysql':
-        $replace = array(
+        $replace = [
           'Y' => '%Y',
           'y' => '%y',
           'M' => '%b',
@@ -1837,11 +1837,11 @@ public function getDateFormat($field, $format, $string_date = FALSE) {
           'i' => '%i',
           's' => '%s',
           'A' => '%p',
-        );
+        ];
         $format = strtr($format, $replace);
         return "DATE_FORMAT($field, '$format')";
       case 'pgsql':
-        $replace = array(
+        $replace = [
           'Y' => 'YYYY',
           'y' => 'YY',
           'M' => 'Mon',
@@ -1861,7 +1861,7 @@ public function getDateFormat($field, $format, $string_date = FALSE) {
           'i' => 'MI',
           's' => 'SS',
           'A' => 'AM',
-        );
+        ];
         $format = strtr($format, $replace);
         if (!$string_date) {
           return "TO_CHAR($field, '$format')";
@@ -1870,7 +1870,7 @@ public function getDateFormat($field, $format, $string_date = FALSE) {
         // date, back to a string again.
         return "TO_CHAR(TO_TIMESTAMP($field, 'YYYY-MM-DD HH24:MI:SS'), '$format')";
       case 'sqlite':
-        $replace = array(
+        $replace = [
           'Y' => '%Y',
           // No format for 2 digit year number.
           'y' => '%Y',
@@ -1896,7 +1896,7 @@ public function getDateFormat($field, $format, $string_date = FALSE) {
           's' => '%S',
           // No format for AM/PM.
           'A' => '',
-        );
+        ];
         $format = strtr($format, $replace);
 
         // Don't use the 'unixepoch' flag for string date comparisons.
diff --git a/core/modules/views/src/Plugin/views/relationship/EntityReverse.php b/core/modules/views/src/Plugin/views/relationship/EntityReverse.php
index 42d6fa1e744cc1bb0f1201a080e273d36694c880..7c01604604951dcebc1583b0fe92a0058c8afdee 100644
--- a/core/modules/views/src/Plugin/views/relationship/EntityReverse.php
+++ b/core/modules/views/src/Plugin/views/relationship/EntityReverse.php
@@ -48,13 +48,13 @@ public function query() {
     $views_data = Views::viewsData()->get($this->table);
     $left_field = $views_data['table']['base']['field'];
 
-    $first = array(
+    $first = [
       'left_table' => $this->tableAlias,
       'left_field' => $left_field,
       'table' => $this->definition['field table'],
       'field' => $this->definition['field field'],
       'adjusted' => TRUE
-    );
+    ];
     if (!empty($this->options['required'])) {
       $first['type'] = 'INNER';
     }
@@ -76,13 +76,13 @@ public function query() {
 
     // Second, relate the field table to the entity specified using
     // the entity id on the field table and the entity's id field.
-    $second = array(
+    $second = [
       'left_table' => $this->first_alias,
       'left_field' => 'entity_id',
       'table' => $this->definition['base'],
       'field' => $this->definition['base field'],
       'adjusted' => TRUE
-    );
+    ];
 
     if (!empty($this->options['required'])) {
       $second['type'] = 'INNER';
diff --git a/core/modules/views/src/Plugin/views/relationship/GroupwiseMax.php b/core/modules/views/src/Plugin/views/relationship/GroupwiseMax.php
index dc23a6872e6d7ca1519e231747938a4e2d6729a5..1db8da7f72c70b3fef9302240ec435dcb6c49d0a 100644
--- a/core/modules/views/src/Plugin/views/relationship/GroupwiseMax.php
+++ b/core/modules/views/src/Plugin/views/relationship/GroupwiseMax.php
@@ -65,12 +65,12 @@ class GroupwiseMax extends RelationshipPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['subquery_sort'] = array('default' => NULL);
+    $options['subquery_sort'] = ['default' => NULL];
     // Descending more useful.
-    $options['subquery_order'] = array('default' => 'DESC');
-    $options['subquery_regenerate'] = array('default' => FALSE);
-    $options['subquery_view'] = array('default' => FALSE);
-    $options['subquery_namespace'] = array('default' => FALSE);
+    $options['subquery_order'] = ['default' => 'DESC'];
+    $options['subquery_regenerate'] = ['default' => FALSE];
+    $options['subquery_view'] = ['default' => FALSE];
+    $options['subquery_namespace'] = ['default' => FALSE];
 
     return $options;
   }
@@ -83,7 +83,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     // Get the sorts that apply to our base.
     $sorts = Views::viewsDataHelper()->fetchFields($this->definition['base'], 'sort');
-    $sort_options = array();
+    $sort_options = [];
     foreach ($sorts as $sort_id => $sort) {
       $sort_options[$sort_id] = "$sort[group]: $sort[title]";
     }
@@ -91,34 +91,34 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
 
     // Extends the relationship's basic options, allowing the user to pick a
     // sort and an order for it.
-    $form['subquery_sort'] = array(
+    $form['subquery_sort'] = [
       '#type' => 'select',
       '#title' => $this->t('Representative sort criteria'),
       // Provide the base field as sane default sort option.
       '#default_value' => !empty($this->options['subquery_sort']) ? $this->options['subquery_sort'] : $this->definition['base'] . '.' . $base_table_data['table']['base']['field'],
       '#options' => $sort_options,
       '#description' => $this->t("The sort criteria is applied to the data brought in by the relationship to determine how a representative item is obtained for each row. For example, to show the most recent node for each user, pick 'Content: Updated date'."),
-    );
+    ];
 
-    $form['subquery_order'] = array(
+    $form['subquery_order'] = [
       '#type' => 'radios',
       '#title' => $this->t('Representative sort order'),
       '#description' => $this->t("The ordering to use for the sort criteria selected above."),
-      '#options' => array('ASC' => $this->t('Ascending'), 'DESC' => $this->t('Descending')),
+      '#options' => ['ASC' => $this->t('Ascending'), 'DESC' => $this->t('Descending')],
       '#default_value' => $this->options['subquery_order'],
-    );
+    ];
 
-    $form['subquery_namespace'] = array(
+    $form['subquery_namespace'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Subquery namespace'),
       '#description' => $this->t('Advanced. Enter a namespace for the subquery used by this relationship.'),
       '#default_value' => $this->options['subquery_namespace'],
-    );
+    ];
 
 
     // WIP: This stuff doesn't work yet: namespacing issues.
     // A list of suitable views to pick one as the subview.
-    $views = array('' => '- None -');
+    $views = ['' => '- None -'];
     foreach (Views::getAllViews() as $view) {
       // Only get views that are suitable:
       // - base must the base that our relationship joins towards
@@ -130,20 +130,20 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       }
     }
 
-    $form['subquery_view'] = array(
+    $form['subquery_view'] = [
       '#type' => 'select',
       '#title' => $this->t('Representative view'),
       '#default_value' => $this->options['subquery_view'],
       '#options' => $views,
       '#description' => $this->t('Advanced. Use another view to generate the relationship subquery. This allows you to use filtering and more than one sort. If you pick a view here, the sort options above are ignored. Your view must have the ID of its base as its only field, and should have some kind of sorting.'),
-    );
+    ];
 
-    $form['subquery_regenerate'] = array(
+    $form['subquery_regenerate'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Generate subquery each time view is run'),
       '#default_value' => $this->options['subquery_regenerate'],
       '#description' => $this->t('Will re-generate the subquery for this relationship every time the view is run, instead of only when these options are saved. Use for testing if you are making changes elsewhere. WARNING: seriously impairs performance.'),
-    );
+    ];
   }
 
   /**
@@ -152,7 +152,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    * We use this to obtain our subquery SQL.
    */
   protected function getTemporaryView() {
-    $view = View::create(array('base_table' => $this->definition['base']));
+    $view = View::create(['base_table' => $this->definition['base']]);
     $view->addDisplay('default');
     return $view->getExecutable();
   }
@@ -198,7 +198,7 @@ protected function leftQuery($options) {
       // We work around this further down.
       $sort = $options['subquery_sort'];
       list($sort_table, $sort_field) = explode('.', $sort);
-      $sort_options = array('order' => $options['subquery_order']);
+      $sort_options = ['order' => $options['subquery_order']];
       $temp_view->addHandler('default', 'sort', $sort_table, $sort_field, $sort_options);
     }
 
@@ -219,7 +219,7 @@ protected function leftQuery($options) {
       list($relationship_table, $relationship_field) = explode(':', $this->definition['relationship']);
       $relationship_id = $temp_view->addHandler('default', 'relationship', $relationship_table, $relationship_field);
     }
-    $temp_item_options = array('relationship' => $relationship_id);
+    $temp_item_options = ['relationship' => $relationship_id];
 
     // Add the correct argument for our relationship's base
     // ie the 'how to get back to base' argument.
diff --git a/core/modules/views/src/Plugin/views/relationship/RelationshipPluginBase.php b/core/modules/views/src/Plugin/views/relationship/RelationshipPluginBase.php
index 25a0001e79162e6fe46c703ab810bd7da1f5295e..860189175c524c6bfb7a1fa7162f7622a6eda7c5 100644
--- a/core/modules/views/src/Plugin/views/relationship/RelationshipPluginBase.php
+++ b/core/modules/views/src/Plugin/views/relationship/RelationshipPluginBase.php
@@ -99,7 +99,7 @@ protected function defineOptions() {
     }
 
     $options['admin_label']['default'] = $label;
-    $options['required'] = array('default' => FALSE);
+    $options['required'] = ['default' => FALSE];
 
     return $options;
   }
@@ -113,12 +113,12 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     unset($form['admin_label']['#fieldset']);
     $form['admin_label']['#weight'] = -1;
 
-    $form['required'] = array(
+    $form['required'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Require this relationship'),
       '#description' => $this->t('Enable to hide items that do not contain this relationship'),
       '#default_value' => !empty($this->options['required']),
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/row/EntityReference.php b/core/modules/views/src/Plugin/views/row/EntityReference.php
index 4ca79ba42f38e7c1e8d16f3098cd8955956db8a0..a985ee366d53f5242eb5062cfad7d8c5229947be 100644
--- a/core/modules/views/src/Plugin/views/row/EntityReference.php
+++ b/core/modules/views/src/Plugin/views/row/EntityReference.php
@@ -25,7 +25,7 @@ class EntityReference extends Fields {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['separator'] = array('default' => '-');
+    $options['separator'] = ['default' => '-'];
 
     return $options;
   }
diff --git a/core/modules/views/src/Plugin/views/row/EntityRow.php b/core/modules/views/src/Plugin/views/row/EntityRow.php
index f5365296531c2d10ebc3addf30f0188179d573af..e98133af72f4db38c10fd17dc62510c705e16314 100644
--- a/core/modules/views/src/Plugin/views/row/EntityRow.php
+++ b/core/modules/views/src/Plugin/views/row/EntityRow.php
@@ -130,7 +130,7 @@ protected function getView() {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['view_mode'] = array('default' => 'default');
+    $options['view_mode'] = ['default' => 'default'];
     return $options;
   }
 
@@ -140,12 +140,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['view_mode'] = array(
+    $form['view_mode'] = [
       '#type' => 'select',
       '#options' => \Drupal::entityManager()->getViewModeOptions($this->entityTypeId),
       '#title' => $this->t('View mode'),
       '#default_value' => $this->options['view_mode'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/row/Fields.php b/core/modules/views/src/Plugin/views/row/Fields.php
index 3904b0c050b42f71dc9e42d66577f0638528d0bb..711704eab2c66b2dc198f94389ae3bc8a55dc96d 100644
--- a/core/modules/views/src/Plugin/views/row/Fields.php
+++ b/core/modules/views/src/Plugin/views/row/Fields.php
@@ -32,10 +32,10 @@ class Fields extends RowPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['inline'] = array('default' => array());
-    $options['separator'] = array('default' => '');
-    $options['hide_empty'] = array('default' => FALSE);
-    $options['default_field_elements'] = array('default' => TRUE);
+    $options['inline'] = ['default' => []];
+    $options['separator'] = ['default' => ''];
+    $options['hide_empty'] = ['default' => FALSE];
+    $options['default_field_elements'] = ['default' => TRUE];
     return $options;
   }
 
@@ -47,48 +47,48 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     $options = $this->displayHandler->getFieldLabels();
 
     if (empty($this->options['inline'])) {
-      $this->options['inline'] = array();
+      $this->options['inline'] = [];
     }
 
-    $form['default_field_elements'] = array(
+    $form['default_field_elements'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Provide default field wrapper elements'),
       '#default_value' => $this->options['default_field_elements'],
       '#description' => $this->t('If not checked, fields that are not configured to customize their HTML elements will get no wrappers at all for their field, label and field + label wrappers. You can use this to quickly reduce the amount of markup the view provides by default, at the cost of making it more difficult to apply CSS.'),
-    );
+    ];
 
-    $form['inline'] = array(
+    $form['inline'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Inline fields'),
       '#options' => $options,
       '#default_value' => $this->options['inline'],
       '#description' => $this->t('Inline fields will be displayed next to each other rather than one after another. Note that some fields will ignore this if they are block elements, particularly body fields and other formatted HTML.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="row_options[default_field_elements]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="row_options[default_field_elements]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
 
-    $form['separator'] = array(
+    $form['separator'] = [
       '#title' => $this->t('Separator'),
       '#type' => 'textfield',
       '#size' => 10,
       '#default_value' => isset($this->options['separator']) ? $this->options['separator'] : '',
       '#description' => $this->t('The separator may be placed between inline fields to keep them from squishing up next to each other. You can use HTML in this field.'),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="row_options[default_field_elements]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="row_options[default_field_elements]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
 
-    $form['hide_empty'] = array(
+    $form['hide_empty'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Hide empty fields'),
       '#default_value' => $this->options['hide_empty'],
       '#description' => $this->t('Do not display fields, labels or markup for fields that are empty.'),
-    );
+    ];
 
   }
 
@@ -97,8 +97,8 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    * There is no need for this function to actually store the data.
    */
   public function submitOptionsForm(&$form, FormStateInterface $form_state) {
-    $inline = $form_state->getValue(array('row_options', 'inline'));
-    $form_state->setValue(array('row_options', 'inline'), array_filter($inline));
+    $inline = $form_state->getValue(['row_options', 'inline']);
+    $form_state->setValue(['row_options', 'inline'], array_filter($inline));
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/row/OpmlFields.php b/core/modules/views/src/Plugin/views/row/OpmlFields.php
index 0c8f684bf284ae9a6d4886977350b2b1e263c1a0..aaeecbf69a14dc61a5c94dcbc1ffd404533d7633 100644
--- a/core/modules/views/src/Plugin/views/row/OpmlFields.php
+++ b/core/modules/views/src/Plugin/views/row/OpmlFields.php
@@ -29,14 +29,14 @@ class OpmlFields extends RowPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['text_field'] = array('default' => '');
-    $options['created_field'] = array('default' => '');
-    $options['type_field'] = array('default' => '');
-    $options['description_field'] = array('default' => '');
-    $options['html_url_field'] = array('default' => '');
-    $options['language_field'] = array('default' => '');
-    $options['xml_url_field'] = array('default' => '');
-    $options['url_field'] = array('default' => '');
+    $options['text_field'] = ['default' => ''];
+    $options['created_field'] = ['default' => ''];
+    $options['type_field'] = ['default' => ''];
+    $options['description_field'] = ['default' => ''];
+    $options['html_url_field'] = ['default' => ''];
+    $options['language_field'] = ['default' => ''];
+    $options['xml_url_field'] = ['default' => ''];
+    $options['url_field'] = ['default' => ''];
     return $options;
   }
 
@@ -46,101 +46,101 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $initial_labels = array('' => $this->t('- None -'));
+    $initial_labels = ['' => $this->t('- None -')];
     $view_fields_labels = $this->displayHandler->getFieldLabels();
     $view_fields_labels = array_merge($initial_labels, $view_fields_labels);
 
-    $types = array(
+    $types = [
       'rss' => $this->t('RSS'),
       'link' => $this->t('Link'),
       'include' => $this->t('Include'),
-    );
+    ];
     $types = array_merge($initial_labels, $types);
-    $form['type_field'] = array(
+    $form['type_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Type attribute'),
       '#description' => $this->t('The type of this row.'),
       '#options' => $types,
       '#default_value' => $this->options['type_field'],
-    );
-    $form['text_field'] = array(
+    ];
+    $form['text_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Text attribute'),
       '#description' => $this->t('The field that is going to be used as the OPML text attribute for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['text_field'],
       '#required' => TRUE,
-    );
-    $form['created_field'] = array(
+    ];
+    $form['created_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Created attribute'),
       '#description' => $this->t('The field that is going to be used as the OPML created attribute for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['created_field'],
-    );
-    $form['description_field'] = array(
+    ];
+    $form['description_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Description attribute'),
       '#description' => $this->t('The field that is going to be used as the OPML description attribute for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['description_field'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="row_options[type_field]"]' => array('value' => 'rss'),
-        ),
-      ),
-    );
-    $form['html_url_field'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="row_options[type_field]"]' => ['value' => 'rss'],
+        ],
+      ],
+    ];
+    $form['html_url_field'] = [
       '#type' => 'select',
       '#title' => $this->t('HTML URL attribute'),
       '#description' => $this->t('The field that is going to be used as the OPML htmlUrl attribute for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['html_url_field'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="row_options[type_field]"]' => array('value' => 'rss'),
-        ),
-      ),
-    );
-    $form['language_field'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="row_options[type_field]"]' => ['value' => 'rss'],
+        ],
+      ],
+    ];
+    $form['language_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Language attribute'),
       '#description' => $this->t('The field that is going to be used as the OPML language attribute for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['language_field'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="row_options[type_field]"]' => array('value' => 'rss'),
-        ),
-      ),
-    );
-    $form['xml_url_field'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="row_options[type_field]"]' => ['value' => 'rss'],
+        ],
+      ],
+    ];
+    $form['xml_url_field'] = [
       '#type' => 'select',
       '#title' => $this->t('XML URL attribute'),
       '#description' => $this->t('The field that is going to be used as the OPML text attribute for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['xml_url_field'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="row_options[type_field]"]' => array('value' => 'rss'),
-        ),
-      ),
-    );
-    $form['url_field'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="row_options[type_field]"]' => ['value' => 'rss'],
+        ],
+      ],
+    ];
+    $form['url_field'] = [
       '#type' => 'select',
       '#title' => $this->t('URL attribute'),
       '#description' => $this->t('The field that is going to be used as the OPML URL attribute for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['url_field'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="row_options[type_field]"]' => array(
-            array('value' => 'link'),
-            array('value' => 'include'),
-          ),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="row_options[type_field]"]' => [
+            ['value' => 'link'],
+            ['value' => 'include'],
+          ],
+        ],
+      ],
+    ];
   }
 
   /**
@@ -157,7 +157,7 @@ public function validate() {
           $errors[] = $this->t('Row style plugin requires specifying which views field to use for XML URL attribute.');
         }
       }
-      elseif (in_array($this->options['type_field'], array('link', 'include'))) {
+      elseif (in_array($this->options['type_field'], ['link', 'include'])) {
         if (empty($this->options['url_field'])) {
           $errors[] = $this->t('Row style plugin requires specifying which views field to use for URL attribute.');
         }
@@ -171,7 +171,7 @@ public function validate() {
    */
   public function render($row) {
     // Create the OPML item array.
-    $item = array();
+    $item = [];
     $row_index = $this->view->row_index;
     $item['text'] = $this->getField($row_index, $this->options['text_field']);
     $item['created'] = $this->getField($row_index, $this->options['created_field']);
@@ -190,13 +190,13 @@ public function render($row) {
     // Remove empty attributes.
     $item = array_filter($item);
 
-    $build = array(
+    $build = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#row' => $item,
       '#field_alias' => isset($this->field_alias) ? $this->field_alias : '',
-    );
+    ];
     return $build;
   }
 
diff --git a/core/modules/views/src/Plugin/views/row/RowPluginBase.php b/core/modules/views/src/Plugin/views/row/RowPluginBase.php
index d1e090e0aac7f7bb79f1b708f42610b88de7bdf6..fd2b96c32261eb58f6920e172d8f07a29e07cc29 100644
--- a/core/modules/views/src/Plugin/views/row/RowPluginBase.php
+++ b/core/modules/views/src/Plugin/views/row/RowPluginBase.php
@@ -64,7 +64,7 @@ function usesFields() {
   protected function defineOptions() {
     $options = parent::defineOptions();
     if (isset($this->base_table)) {
-      $options['relationship'] = array('default' => 'none');
+      $options['relationship'] = ['default' => 'none'];
     }
 
     return $options;
@@ -81,7 +81,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       // A whole bunch of code to figure out what relationships are valid for
       // this item.
       $relationships = $executable->display_handler->getOption('relationships');
-      $relationship_options = array();
+      $relationship_options = [];
 
       foreach ($relationships as $relationship) {
         $relationship_handler = Views::handlerManager('relationship')->getHandler($relationship);
@@ -96,25 +96,25 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       }
 
       if (!empty($relationship_options)) {
-        $relationship_options = array_merge(array('none' => $this->t('Do not use a relationship')), $relationship_options);
+        $relationship_options = array_merge(['none' => $this->t('Do not use a relationship')], $relationship_options);
         $rel = empty($this->options['relationship']) ? 'none' : $this->options['relationship'];
         if (empty($relationship_options[$rel])) {
           // Pick the first relationship.
           $rel = key($relationship_options);
         }
 
-        $form['relationship'] = array(
+        $form['relationship'] = [
           '#type' => 'select',
           '#title' => $this->t('Relationship'),
           '#options' => $relationship_options,
           '#default_value' => $rel,
-        );
+        ];
       }
       else {
-        $form['relationship'] = array(
+        $form['relationship'] = [
           '#type' => 'value',
           '#value' => 'none',
-        );
+        ];
       }
     }
   }
@@ -164,13 +164,13 @@ public function preRender($result) { }
    *   The rendered output of a single row, used by the style plugin.
    */
   public function render($row) {
-    return array(
+    return [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#row' => $row,
       '#field_alias' => isset($this->field_alias) ? $this->field_alias : '',
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/row/RssFields.php b/core/modules/views/src/Plugin/views/row/RssFields.php
index a420bb7f99755da7715df84f4f5c414da2082e1e..1b56aae5f18c19a3a53243425e070c1d66a532d8 100644
--- a/core/modules/views/src/Plugin/views/row/RssFields.php
+++ b/core/modules/views/src/Plugin/views/row/RssFields.php
@@ -27,87 +27,87 @@ class RssFields extends RowPluginBase {
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['title_field'] = array('default' => '');
-    $options['link_field'] = array('default' => '');
-    $options['description_field'] = array('default' => '');
-    $options['creator_field'] = array('default' => '');
-    $options['date_field'] = array('default' => '');
-    $options['guid_field_options']['contains']['guid_field'] = array('default' => '');
-    $options['guid_field_options']['contains']['guid_field_is_permalink'] = array('default' => TRUE);
+    $options['title_field'] = ['default' => ''];
+    $options['link_field'] = ['default' => ''];
+    $options['description_field'] = ['default' => ''];
+    $options['creator_field'] = ['default' => ''];
+    $options['date_field'] = ['default' => ''];
+    $options['guid_field_options']['contains']['guid_field'] = ['default' => ''];
+    $options['guid_field_options']['contains']['guid_field_is_permalink'] = ['default' => TRUE];
     return $options;
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $initial_labels = array('' => $this->t('- None -'));
+    $initial_labels = ['' => $this->t('- None -')];
     $view_fields_labels = $this->displayHandler->getFieldLabels();
     $view_fields_labels = array_merge($initial_labels, $view_fields_labels);
 
-    $form['title_field'] = array(
+    $form['title_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Title field'),
       '#description' => $this->t('The field that is going to be used as the RSS item title for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['title_field'],
       '#required' => TRUE,
-    );
-    $form['link_field'] = array(
+    ];
+    $form['link_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Link field'),
       '#description' => $this->t('The field that is going to be used as the RSS item link for each row. This must be a drupal relative path.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['link_field'],
       '#required' => TRUE,
-    );
-    $form['description_field'] = array(
+    ];
+    $form['description_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Description field'),
       '#description' => $this->t('The field that is going to be used as the RSS item description for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['description_field'],
       '#required' => TRUE,
-    );
-    $form['creator_field'] = array(
+    ];
+    $form['creator_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Creator field'),
       '#description' => $this->t('The field that is going to be used as the RSS item creator for each row.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['creator_field'],
       '#required' => TRUE,
-    );
-    $form['date_field'] = array(
+    ];
+    $form['date_field'] = [
       '#type' => 'select',
       '#title' => $this->t('Publication date field'),
       '#description' => $this->t('The field that is going to be used as the RSS item pubDate for each row. It needs to be in RFC 2822 format.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['date_field'],
       '#required' => TRUE,
-    );
-    $form['guid_field_options'] = array(
+    ];
+    $form['guid_field_options'] = [
       '#type' => 'details',
       '#title' => $this->t('GUID settings'),
       '#open' => TRUE,
-    );
-    $form['guid_field_options']['guid_field'] = array(
+    ];
+    $form['guid_field_options']['guid_field'] = [
       '#type' => 'select',
       '#title' => $this->t('GUID field'),
       '#description' => $this->t('The globally unique identifier of the RSS item.'),
       '#options' => $view_fields_labels,
       '#default_value' => $this->options['guid_field_options']['guid_field'],
       '#required' => TRUE,
-    );
-    $form['guid_field_options']['guid_field_is_permalink'] = array(
+    ];
+    $form['guid_field_options']['guid_field_is_permalink'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('GUID is permalink'),
       '#description' => $this->t('The RSS item GUID is a permalink.'),
       '#default_value' => $this->options['guid_field_options']['guid_field_is_permalink'],
-    );
+    ];
   }
 
   public function validate() {
     $errors = parent::validate();
-    $required_options = array('title_field', 'link_field', 'description_field', 'creator_field', 'date_field');
+    $required_options = ['title_field', 'link_field', 'description_field', 'creator_field', 'date_field'];
     foreach ($required_options as $required_option) {
       if (empty($this->options[$required_option])) {
         $errors[] = $this->t('Row style plugin requires specifying which views fields to use for RSS item.');
@@ -129,7 +129,7 @@ public function render($row) {
     if (function_exists('rdf_get_namespaces')) {
       // Merge RDF namespaces in the XML namespaces in case they are used
       // further in the RSS content.
-      $xml_rdf_namespaces = array();
+      $xml_rdf_namespaces = [];
       foreach (rdf_get_namespaces() as $prefix => $uri) {
         $xml_rdf_namespaces['xmlns:' . $prefix] = $uri;
       }
@@ -146,14 +146,14 @@ public function render($row) {
     $field = $this->getField($row_index, $this->options['description_field']);
     $item->description = is_array($field) ? $field : ['#markup' => $field];
 
-    $item->elements = array(
-      array('key' => 'pubDate', 'value' => $this->getField($row_index, $this->options['date_field'])),
-      array(
+    $item->elements = [
+      ['key' => 'pubDate', 'value' => $this->getField($row_index, $this->options['date_field'])],
+      [
         'key' => 'dc:creator',
         'value' => $this->getField($row_index, $this->options['creator_field']),
-        'namespace' => array('xmlns:dc' => 'http://purl.org/dc/elements/1.1/'),
-      ),
-    );
+        'namespace' => ['xmlns:dc' => 'http://purl.org/dc/elements/1.1/'],
+      ],
+    ];
     $guid_is_permalink_string = 'false';
     $item_guid = $this->getField($row_index, $this->options['guid_field_options']['guid_field']);
     if ($this->options['guid_field_options']['guid_field_is_permalink']) {
@@ -162,11 +162,11 @@ public function render($row) {
       //   https://www.drupal.org/node/2430589.
       $item_guid = Url::fromUserInput('/' . $item_guid)->setAbsolute()->toString();
     }
-    $item->elements[] = array(
+    $item->elements[] = [
       'key' => 'guid',
       'value' => $item_guid,
-      'attributes' => array('isPermaLink' => $guid_is_permalink_string),
-    );
+      'attributes' => ['isPermaLink' => $guid_is_permalink_string],
+    ];
 
     $row_index++;
 
@@ -176,13 +176,13 @@ public function render($row) {
       }
     }
 
-    $build = array(
+    $build = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#row' => $item,
       '#field_alias' => isset($this->field_alias) ? $this->field_alias : '',
-    );
+    ];
 
     return $build;
   }
diff --git a/core/modules/views/src/Plugin/views/row/RssPluginBase.php b/core/modules/views/src/Plugin/views/row/RssPluginBase.php
index b5fd385bdc31cacab07812c84cbfb5184292a164..b8c518bc9e51215b62efecb96bbb96a315813c45 100644
--- a/core/modules/views/src/Plugin/views/row/RssPluginBase.php
+++ b/core/modules/views/src/Plugin/views/row/RssPluginBase.php
@@ -61,7 +61,7 @@ public static function create(ContainerInterface $container, array $configuratio
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['view_mode'] = array('default' => 'default');
+    $options['view_mode'] = ['default' => 'default'];
 
     return $options;
   }
@@ -72,12 +72,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['view_mode'] = array(
+    $form['view_mode'] = [
       '#type' => 'select',
       '#title' => $this->t('Display type'),
       '#options' => $this->buildOptionsForm_summary_options(),
       '#default_value' => $this->options['view_mode'],
-    );
+    ];
   }
 
   /**
@@ -85,7 +85,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    */
   public function buildOptionsForm_summary_options() {
     $view_modes = $this->entityManager->getViewModes($this->entityTypeId);
-    $options = array();
+    $options = [];
     foreach ($view_modes as $mode => $settings) {
       $options[$mode] = $settings['label'];
     }
diff --git a/core/modules/views/src/Plugin/views/sort/Date.php b/core/modules/views/src/Plugin/views/sort/Date.php
index 4017e2b4c986c19e6b21686d8538ee0753a00163..0c7d9e14fc58e78e0be0f1abe7120bbe46f718a8 100644
--- a/core/modules/views/src/Plugin/views/sort/Date.php
+++ b/core/modules/views/src/Plugin/views/sort/Date.php
@@ -17,7 +17,7 @@ class Date extends SortPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['granularity'] = array('default' => 'second');
+    $options['granularity'] = ['default' => 'second'];
 
     return $options;
   }
@@ -25,20 +25,20 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['granularity'] = array(
+    $form['granularity'] = [
       '#type' => 'radios',
       '#title' => $this->t('Granularity'),
-      '#options' => array(
+      '#options' => [
         'second' => $this->t('Second'),
         'minute' => $this->t('Minute'),
         'hour'   => $this->t('Hour'),
         'day'    => $this->t('Day'),
         'month'  => $this->t('Month'),
         'year'   => $this->t('Year'),
-      ),
+      ],
       '#description' => $this->t('The granularity is the smallest unit to use when determining whether two dates are the same; for example, if the granularity is "Year" then all dates in 1999, regardless of when they fall in 1999, will be considered the same date.'),
       '#default_value' => $this->options['granularity'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/sort/GroupByNumeric.php b/core/modules/views/src/Plugin/views/sort/GroupByNumeric.php
index b7245ddc69c8678e9586988de3fd5ad673773df5..5308439e66cede2db2fd894a3109a91f14a0b31c 100644
--- a/core/modules/views/src/Plugin/views/sort/GroupByNumeric.php
+++ b/core/modules/views/src/Plugin/views/sort/GroupByNumeric.php
@@ -30,9 +30,9 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
   public function query() {
     $this->ensureMyTable();
 
-    $params = array(
+    $params = [
       'function' => $this->options['group_type'],
-    );
+    ];
 
     $this->query->addOrderBy($this->tableAlias, $this->realField, $this->options['order'], NULL, $params);
   }
diff --git a/core/modules/views/src/Plugin/views/sort/SortPluginBase.php b/core/modules/views/src/Plugin/views/sort/SortPluginBase.php
index 97122b1507de5a3e62fb92185606954ce67fe9bc..a40dc346b3aef255c03ae681e953fd86657a03dd 100644
--- a/core/modules/views/src/Plugin/views/sort/SortPluginBase.php
+++ b/core/modules/views/src/Plugin/views/sort/SortPluginBase.php
@@ -42,13 +42,13 @@ public function query() {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['order'] = array('default' => 'ASC');
-    $options['exposed'] = array('default' => FALSE);
-    $options['expose'] = array(
-      'contains' => array(
-        'label' => array('default' => ''),
-      ),
-    );
+    $options['order'] = ['default' => 'ASC'];
+    $options['exposed'] = ['default' => FALSE];
+    $options['expose'] = [
+      'contains' => [
+        'label' => ['default' => ''],
+      ],
+    ];
     return $options;
   }
 
@@ -79,9 +79,9 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     if ($this->canExpose()) {
       $this->showExposeButton($form, $form_state);
     }
-    $form['op_val_start'] = array('#value' => '<div class="clearfix">');
+    $form['op_val_start'] = ['#value' => '<div class="clearfix">'];
     $this->showSortForm($form, $form_state);
-    $form['op_val_end'] = array('#value' => '</div>');
+    $form['op_val_end'] = ['#value' => '</div>'];
     if ($this->canExpose()) {
       $this->showExposeForm($form, $form_state);
     }
@@ -91,47 +91,47 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    * Shortcut to display the expose/hide button.
    */
   public function showExposeButton(&$form, FormStateInterface $form_state) {
-    $form['expose_button'] = array(
+    $form['expose_button'] = [
       '#prefix' => '<div class="views-expose clearfix">',
       '#suffix' => '</div>',
       // Should always come first
       '#weight' => -1000,
-    );
+    ];
 
     // Add a checkbox for JS users, which will have behavior attached to it
     // so it can replace the button.
-    $form['expose_button']['checkbox'] = array(
-      '#theme_wrappers' => array('container'),
-      '#attributes' => array('class' => array('js-only')),
-    );
-    $form['expose_button']['checkbox']['checkbox'] = array(
+    $form['expose_button']['checkbox'] = [
+      '#theme_wrappers' => ['container'],
+      '#attributes' => ['class' => ['js-only']],
+    ];
+    $form['expose_button']['checkbox']['checkbox'] = [
       '#title' => $this->t('Expose this sort to visitors, to allow them to change it'),
       '#type' => 'checkbox',
-    );
+    ];
 
     // Then add the button itself.
     if (empty($this->options['exposed'])) {
-      $form['expose_button']['markup'] = array(
+      $form['expose_button']['markup'] = [
         '#markup' => '<div class="description exposed-description" style="float: left; margin-right:10px">' . $this->t('This sort is not exposed. Expose it to allow the users to change it.') . '</div>',
-      );
-      $form['expose_button']['button'] = array(
-        '#limit_validation_errors' => array(),
+      ];
+      $form['expose_button']['button'] = [
+        '#limit_validation_errors' => [],
         '#type' => 'submit',
         '#value' => $this->t('Expose sort'),
-        '#submit' => array(array($this, 'displayExposedForm')),
-      );
+        '#submit' => [[$this, 'displayExposedForm']],
+      ];
       $form['expose_button']['checkbox']['checkbox']['#default_value'] = 0;
     }
     else {
-      $form['expose_button']['markup'] = array(
+      $form['expose_button']['markup'] = [
         '#markup' => '<div class="description exposed-description">' . $this->t('This sort is exposed. If you hide it, users will not be able to change it.') . '</div>',
-      );
-      $form['expose_button']['button'] = array(
-        '#limit_validation_errors' => array(),
+      ];
+      $form['expose_button']['button'] = [
+        '#limit_validation_errors' => [],
         '#type' => 'submit',
         '#value' => $this->t('Hide sort'),
-        '#submit' => array(array($this, 'displayExposedForm')),
-      );
+        '#submit' => [[$this, 'displayExposedForm']],
+      ];
       $form['expose_button']['checkbox']['checkbox']['#default_value'] = 1;
     }
   }
@@ -166,12 +166,12 @@ public function submitOptionsForm(&$form, FormStateInterface $form_state) {
   protected function showSortForm(&$form, FormStateInterface $form_state) {
     $options = $this->sortOptions();
     if (!empty($options)) {
-      $form['order'] = array(
+      $form['order'] = [
         '#title' => $this->t('Order'),
         '#type' => 'radios',
         '#options' => $options,
         '#default_value' => $this->options['order'],
-      );
+      ];
     }
   }
 
@@ -184,10 +184,10 @@ public function sortSubmit(&$form, FormStateInterface $form_state) { }
    * Should be overridden by classes that don't override sort_form
    */
   protected function sortOptions() {
-    return array(
+    return [
       'ASC' => $this->t('Sort ascending'),
       'DESC' => $this->t('Sort descending'),
-    );
+    ];
   }
 
   public function buildExposeForm(&$form, FormStateInterface $form_state) {
@@ -195,26 +195,26 @@ public function buildExposeForm(&$form, FormStateInterface $form_state) {
     // prior to rendering. That's why the preRender for it needs to run first,
     // so that when the next preRender (the one for fieldsets) runs, it gets
     // the flattened data.
-    array_unshift($form['#pre_render'], array(get_class($this), 'preRenderFlattenData'));
+    array_unshift($form['#pre_render'], [get_class($this), 'preRenderFlattenData']);
     $form['expose']['#flatten'] = TRUE;
 
-    $form['expose']['label'] = array(
+    $form['expose']['label'] = [
       '#type' => 'textfield',
       '#default_value' => $this->options['expose']['label'],
       '#title' => $this->t('Label'),
       '#required' => TRUE,
       '#size' => 40,
       '#weight' => -1,
-   );
+   ];
   }
 
   /**
    * Provide default options for exposed sorts.
    */
   public function defaultExposeOptions() {
-    $this->options['expose'] = array(
+    $this->options['expose'] = [
       'label' => $this->definition['title'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/src/Plugin/views/style/DefaultSummary.php b/core/modules/views/src/Plugin/views/style/DefaultSummary.php
index abd149dc6b4dc268d60fc1893c87bdf5cf8a30c8..0b4325bcc93fc42ac0829fdcbfacdc9931fec24b 100644
--- a/core/modules/views/src/Plugin/views/style/DefaultSummary.php
+++ b/core/modules/views/src/Plugin/views/style/DefaultSummary.php
@@ -22,10 +22,10 @@ class DefaultSummary extends StylePluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['base_path'] = array('default' => '');
-    $options['count'] = array('default' => TRUE);
-    $options['override'] = array('default' => FALSE);
-    $options['items_per_page'] = array('default' => 25);
+    $options['base_path'] = ['default' => ''];
+    $options['count'] = ['default' => TRUE];
+    $options['override'] = ['default' => FALSE];
+    $options['items_per_page'] = ['default' => 25];
 
     return $options;
   }
@@ -37,7 +37,7 @@ public function query() {
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
-    $form['base_path'] = array(
+    $form['base_path'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Base path'),
       '#default_value' => $this->options['base_path'],
@@ -46,43 +46,43 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         Do not include beginning and ending forward slash. If this value
         is empty, views will use the first path found as the base path,
         in page displays, or / if no path could be found.'),
-    );
-    $form['count'] = array(
+    ];
+    $form['count'] = [
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['count']),
       '#title' => $this->t('Display record count with link'),
-    );
-    $form['override'] = array(
+    ];
+    $form['override'] = [
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['override']),
       '#title' => $this->t('Override number of items to display'),
-    );
+    ];
 
-    $form['items_per_page'] = array(
+    $form['items_per_page'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Items to display'),
       '#default_value' => $this->options['items_per_page'],
-      '#states' => array(
-        'visible' => array(
-          ':input[name="options[summary][options][' . $this->definition['id'] . '][override]"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="options[summary][options][' . $this->definition['id'] . '][override]"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
   }
 
   public function render() {
-    $rows = array();
+    $rows = [];
     foreach ($this->view->result as $row) {
       // @todo: Include separator as an option.
       $rows[] = $row;
     }
 
-    return array(
+    return [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#rows' => $rows,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/style/EntityReference.php b/core/modules/views/src/Plugin/views/style/EntityReference.php
index f694b00e1385bf97c09913d227b225c565cc7471..e07a0f1858998d61ce539d5a79ea3bf272dc290f 100644
--- a/core/modules/views/src/Plugin/views/style/EntityReference.php
+++ b/core/modules/views/src/Plugin/views/style/EntityReference.php
@@ -41,7 +41,7 @@ class EntityReference extends StylePluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['search_fields'] = array('default' => array());
+    $options['search_fields'] = ['default' => []];
 
     return $options;
   }
@@ -53,7 +53,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
     $options = $this->displayHandler->getFieldLabels(TRUE);
-    $form['search_fields'] = array(
+    $form['search_fields'] = [
       '#type' => 'checkboxes',
       '#title' => $this->t('Search fields'),
       '#options' => $options,
@@ -61,7 +61,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       '#default_value' => $this->options['search_fields'],
       '#description' => $this->t('Select the field(s) that will be searched when using the autocomplete widget.'),
       '#weight' => -3,
-    );
+    ];
   }
 
   /**
@@ -81,7 +81,7 @@ public function render() {
 
     // @todo We don't display grouping info for now. Could be useful for select
     // widget, though.
-    $results = array();
+    $results = [];
     foreach ($sets as $records) {
       foreach ($records as $values) {
         $results[$values->{$id_field_alias}] = $this->view->rowPlugin->render($values);
diff --git a/core/modules/views/src/Plugin/views/style/Grid.php b/core/modules/views/src/Plugin/views/style/Grid.php
index 34ab8ed2855e30efc1b9166f6e9c021201fa3681..938c1b5236459fcaf925dec76f3adc6945280023 100644
--- a/core/modules/views/src/Plugin/views/style/Grid.php
+++ b/core/modules/views/src/Plugin/views/style/Grid.php
@@ -32,13 +32,13 @@ class Grid extends StylePluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['columns'] = array('default' => '4');
-    $options['automatic_width'] = array('default' => TRUE);
-    $options['alignment'] = array('default' => 'horizontal');
-    $options['col_class_custom'] = array('default' => '');
-    $options['col_class_default'] = array('default' => TRUE);
-    $options['row_class_custom'] = array('default' => '');
-    $options['row_class_default'] = array('default' => TRUE);
+    $options['columns'] = ['default' => '4'];
+    $options['automatic_width'] = ['default' => TRUE];
+    $options['alignment'] = ['default' => 'horizontal'];
+    $options['col_class_custom'] = ['default' => ''];
+    $options['col_class_default'] = ['default' => TRUE];
+    $options['row_class_custom'] = ['default' => ''];
+    $options['row_class_default'] = ['default' => TRUE];
     return $options;
   }
 
@@ -47,53 +47,53 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['columns'] = array(
+    $form['columns'] = [
       '#type' => 'number',
       '#title' => $this->t('Number of columns'),
       '#default_value' => $this->options['columns'],
       '#required' => TRUE,
       '#min' => 1,
-    );
-    $form['automatic_width'] = array(
+    ];
+    $form['automatic_width'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Automatic width'),
       '#description' => $this->t('The width of each column will be calculated automatically based on the number of columns provided. If additional classes are entered or a theme injects classes based on a grid system, disabling this option may prove beneficial.'),
       '#default_value' => $this->options['automatic_width'],
-    );
-    $form['alignment'] = array(
+    ];
+    $form['alignment'] = [
       '#type' => 'radios',
       '#title' => $this->t('Alignment'),
-      '#options' => array('horizontal' => $this->t('Horizontal'), 'vertical' => $this->t('Vertical')),
+      '#options' => ['horizontal' => $this->t('Horizontal'), 'vertical' => $this->t('Vertical')],
       '#default_value' => $this->options['alignment'],
       '#description' => $this->t('Horizontal alignment will place items starting in the upper left and moving right. Vertical alignment will place items starting in the upper left and moving down.'),
-    );
-    $form['col_class_default'] = array(
+    ];
+    $form['col_class_default'] = [
       '#title' => $this->t('Default column classes'),
       '#description' => $this->t('Add the default views column classes like views-col, col-1 and clearfix to the output. You can use this to quickly reduce the amount of markup the view provides by default, at the cost of making it more difficult to apply CSS.'),
       '#type' => 'checkbox',
       '#default_value' => $this->options['col_class_default'],
-    );
-    $form['col_class_custom'] = array(
+    ];
+    $form['col_class_custom'] = [
       '#title' => $this->t('Custom column class'),
       '#description' => $this->t('Additional classes to provide on each column. Separated by a space.'),
       '#type' => 'textfield',
       '#default_value' => $this->options['col_class_custom'],
-    );
+    ];
     if ($this->usesFields()) {
       $form['col_class_custom']['#description'] .= ' ' . $this->t('You may use field tokens from as per the "Replacement patterns" used in "Rewrite the output of this field" for all fields.');
     }
-    $form['row_class_default'] = array(
+    $form['row_class_default'] = [
       '#title' => $this->t('Default row classes'),
       '#description' => $this->t('Adds the default views row classes like views-row, row-1 and clearfix to the output. You can use this to quickly reduce the amount of markup the view provides by default, at the cost of making it more difficult to apply CSS.'),
       '#type' => 'checkbox',
       '#default_value' => $this->options['row_class_default'],
-    );
-    $form['row_class_custom'] = array(
+    ];
+    $form['row_class_custom'] = [
       '#title' => $this->t('Custom row class'),
       '#description' => $this->t('Additional classes to provide on each row. Separated by a space.'),
       '#type' => 'textfield',
       '#default_value' => $this->options['row_class_custom'],
-    );
+    ];
     if ($this->usesFields()) {
       $form['row_class_custom']['#description'] .= ' ' . $this->t('You may use field tokens from as per the "Replacement patterns" used in "Rewrite the output of this field" for all fields.');
     }
diff --git a/core/modules/views/src/Plugin/views/style/HtmlList.php b/core/modules/views/src/Plugin/views/style/HtmlList.php
index a89b0f1269b2664de86eb65c89c4656f89a2bd23..a6df09d2b2790d1bc5680f5f70b5aa98411f2f56 100644
--- a/core/modules/views/src/Plugin/views/style/HtmlList.php
+++ b/core/modules/views/src/Plugin/views/style/HtmlList.php
@@ -39,9 +39,9 @@ class HtmlList extends StylePluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['type'] = array('default' => 'ul');
-    $options['class'] = array('default' => '');
-    $options['wrapper_class'] = array('default' => 'item-list');
+    $options['type'] = ['default' => 'ul'];
+    $options['class'] = ['default' => ''];
+    $options['wrapper_class'] = ['default' => 'item-list'];
 
     return $options;
   }
@@ -51,26 +51,26 @@ protected function defineOptions() {
    */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['type'] = array(
+    $form['type'] = [
       '#type' => 'radios',
       '#title' => $this->t('List type'),
-      '#options' => array('ul' => $this->t('Unordered list'), 'ol' => $this->t('Ordered list')),
+      '#options' => ['ul' => $this->t('Unordered list'), 'ol' => $this->t('Ordered list')],
       '#default_value' => $this->options['type'],
-    );
-    $form['wrapper_class'] = array(
+    ];
+    $form['wrapper_class'] = [
       '#title' => $this->t('Wrapper class'),
       '#description' => $this->t('The class to provide on the wrapper, outside the list.'),
       '#type' => 'textfield',
       '#size' => '30',
       '#default_value' => $this->options['wrapper_class'],
-    );
-    $form['class'] = array(
+    ];
+    $form['class'] = [
       '#title' => $this->t('List class'),
       '#description' => $this->t('The class to provide on the list element itself.'),
       '#type' => 'textfield',
       '#size' => '30',
       '#default_value' => $this->options['class'],
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/style/Mapping.php b/core/modules/views/src/Plugin/views/style/Mapping.php
index e7c72422df8d4e0070c193dc763a46ebea22e30e..7db524788665e8c9e9c092251971aec57897adec 100644
--- a/core/modules/views/src/Plugin/views/style/Mapping.php
+++ b/core/modules/views/src/Plugin/views/style/Mapping.php
@@ -49,14 +49,14 @@ protected function defineOptions() {
 
     // Parse the mapping and add a default for each.
     foreach ($this->defineMapping() as $key => $value) {
-      $default = !empty($value['#multiple']) ? array() : '';
-      $options['mapping']['contains'][$key] = array(
+      $default = !empty($value['#multiple']) ? [] : '';
+      $options['mapping']['contains'][$key] = [
         'default' => isset($value['#default_value']) ? $value['#default_value'] : $default,
-      );
+      ];
       if (!empty($value['#toggle'])) {
-        $options['mapping']['contains']["toggle_$key"] = array(
+        $options['mapping']['contains']["toggle_$key"] = [
           'default' => FALSE,
-        );
+        ];
       }
     }
 
@@ -79,19 +79,19 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     $field_labels = $this->displayHandler->getFieldLabels();
 
     // Provide some default values.
-    $defaults = array(
+    $defaults = [
       '#type' => 'select',
       '#required' => FALSE,
       '#multiple' => FALSE,
-    );
+    ];
 
     // For each mapping, add a select element to the form.
     foreach ($options as $key => $value) {
       // If the field is optional, add a 'None' value to the top of the options.
-      $field_options = array();
+      $field_options = [];
       $required = !empty($mapping[$key]['#required']);
       if (!$required && empty($mapping[$key]['#multiple'])) {
-        $field_options = array('' => $this->t('- None -'));
+        $field_options = ['' => $this->t('- None -')];
       }
       $field_options += $field_labels;
 
@@ -104,19 +104,19 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       }
 
       // These values must always be set.
-      $overrides = array(
+      $overrides = [
         '#options' => $field_options,
         '#default_value' => $options[$key],
-      );
+      ];
 
       // Optionally allow the select to be toggleable.
       if (!empty($mapping[$key]['#toggle'])) {
-        $form['mapping']["toggle_$key"] = array(
+        $form['mapping']["toggle_$key"] = [
           '#type' => 'checkbox',
-          '#title' => $this->t('Use a custom %field_name', array('%field_name' => strtolower($mapping[$key]['#title']))),
+          '#title' => $this->t('Use a custom %field_name', ['%field_name' => strtolower($mapping[$key]['#title'])]),
           '#default_value' => $this->options['mapping']["toggle_$key"],
-        );
-        $overrides['#states']['visible'][':input[name="style_options[mapping][' . "toggle_$key" . ']"]'] = array('checked' => TRUE);
+        ];
+        $overrides['#states']['visible'][':input[name="style_options[mapping][' . "toggle_$key" . ']"]'] = ['checked' => TRUE];
       }
 
       $form['mapping'][$key] = $overrides + $mapping[$key] + $defaults;
@@ -129,13 +129,13 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    * Provides the mapping definition as an available variable.
    */
   public function render() {
-    return array(
+    return [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#rows' => $this->view->result,
       '#mapping' => $this->defineMapping(),
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/style/Opml.php b/core/modules/views/src/Plugin/views/style/Opml.php
index ed02511a0c46c8165119a310b5b76fb05a2dd4ed..69679d3ce7bd734a47e230618bb45b5f279eb8ca 100644
--- a/core/modules/views/src/Plugin/views/style/Opml.php
+++ b/core/modules/views/src/Plugin/views/style/Opml.php
@@ -31,7 +31,7 @@ class Opml extends StylePluginBase {
    */
   public function attachTo(array &$build, $display_id, Url $feed_url, $title) {
     $display = $this->view->displayHandlers->get($display_id);
-    $url_options = array();
+    $url_options = [];
     $input = $this->view->getExposedInput();
     if ($input) {
       $url_options['query'] = $input;
@@ -41,15 +41,15 @@ public function attachTo(array &$build, $display_id, Url $feed_url, $title) {
     $url = $feed_url->setOptions($url_options)->toString();
     if ($display->hasPath()) {
       if (empty($this->preview)) {
-        $build['#attached']['feed'][] = array($url, $title);
+        $build['#attached']['feed'][] = [$url, $title];
       }
     }
     else {
-      $this->view->feedIcons[] = array(
+      $this->view->feedIcons[] = [
         '#theme' => 'feed_icon',
         '#url' => $url,
         '#title' => $title,
-      );
+      ];
     }
   }
 
@@ -61,19 +61,19 @@ public function render() {
       debug('Drupal\views\Plugin\views\style\Opml: Missing row plugin');
       return;
     }
-    $rows = array();
+    $rows = [];
 
     foreach ($this->view->result as $row_index => $row) {
       $this->view->row_index = $row_index;
       $rows[] = $this->view->rowPlugin->render($row);
     }
 
-    $build = array(
+    $build = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#rows' => $rows,
-    );
+    ];
     unset($this->view->row_index);
     return $build;
   }
diff --git a/core/modules/views/src/Plugin/views/style/Rss.php b/core/modules/views/src/Plugin/views/style/Rss.php
index e612453e622eb084dbad9f712026e1d76b946bf4..b7efa578d75b1c749be405761c47c82045ea05d5 100644
--- a/core/modules/views/src/Plugin/views/style/Rss.php
+++ b/core/modules/views/src/Plugin/views/style/Rss.php
@@ -28,7 +28,7 @@ class Rss extends StylePluginBase {
   protected $usesRowPlugin = TRUE;
 
   public function attachTo(array &$build, $display_id, Url $feed_url, $title) {
-    $url_options = array();
+    $url_options = [];
     $input = $this->view->getExposedInput();
     if ($input) {
       $url_options['query'] = $input;
@@ -45,18 +45,18 @@ public function attachTo(array &$build, $display_id, Url $feed_url, $title) {
     ];
 
     // Attach a link to the RSS feed, which is an alternate representation.
-    $build['#attached']['html_head_link'][][] = array(
+    $build['#attached']['html_head_link'][][] = [
       'rel' => 'alternate',
       'type' => 'application/rss+xml',
       'title' => $title,
       'href' => $url,
-    );
+    ];
   }
 
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['description'] = array('default' => '');
+    $options['description'] = ['default' => ''];
 
     return $options;
   }
@@ -64,13 +64,13 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['description'] = array(
+    $form['description'] = [
       '#type' => 'textfield',
       '#title' => $this->t('RSS description'),
       '#default_value' => $this->options['description'],
       '#description' => $this->t('This will appear in the RSS feed itself.'),
       '#maxlength' => 1024,
-    );
+    ];
   }
 
   /**
@@ -80,7 +80,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    *   A render array.
    */
   protected function getChannelElements() {
-    return array();
+    return [];
   }
 
   /**
@@ -101,13 +101,13 @@ public function getDescription() {
   public function render() {
     if (empty($this->view->rowPlugin)) {
       debug('Drupal\views\Plugin\views\style\Rss: Missing row plugin');
-      return array();
+      return [];
     }
     $rows = [];
 
     // This will be filled in by the row plugin and is used later on in the
     // theming output.
-    $this->namespaces = array('xmlns:dc' => 'http://purl.org/dc/elements/1.1/');
+    $this->namespaces = ['xmlns:dc' => 'http://purl.org/dc/elements/1.1/'];
 
     // Fetch any additional elements for the channel and merge in their
     // namespaces.
@@ -123,12 +123,12 @@ public function render() {
       $rows[] = $this->view->rowPlugin->render($row);
     }
 
-    $build = array(
+    $build = [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#options' => $this->options,
       '#rows' => $rows,
-    );
+    ];
     unset($this->view->row_index);
     return $build;
   }
diff --git a/core/modules/views/src/Plugin/views/style/StylePluginBase.php b/core/modules/views/src/Plugin/views/style/StylePluginBase.php
index a7b191753f0640c260c8aa4ffe530471532952bb..1131b6af0d06926522ed11bdc3b462c1464b7eb9 100644
--- a/core/modules/views/src/Plugin/views/style/StylePluginBase.php
+++ b/core/modules/views/src/Plugin/views/style/StylePluginBase.php
@@ -47,7 +47,7 @@ abstract class StylePluginBase extends PluginBase {
   /**
    * Store all available tokens row rows.
    */
-  protected $rowTokens = array();
+  protected $rowTokens = [];
 
   /**
    * Does the style plugin allows to use style plugins.
@@ -122,9 +122,9 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
       $this->view->rowPlugin = $display->getPlugin('row');
     }
 
-    $this->options += array(
-      'grouping' => array(),
-    );
+    $this->options += [
+      'grouping' => [],
+    ];
 
   }
 
@@ -230,7 +230,7 @@ public function getRowClass($row_index) {
   public function tokenizeValue($value, $row_index) {
     if (strpos($value, '{{') !== FALSE) {
       // Row tokens might be empty, for example for node row style.
-      $tokens = isset($this->rowTokens[$row_index]) ? $this->rowTokens[$row_index] : array();
+      $tokens = isset($this->rowTokens[$row_index]) ? $this->rowTokens[$row_index] : [];
       if (!empty($this->view->build_info['substitutions'])) {
         $tokens += $this->view->build_info['substitutions'];
       }
@@ -257,12 +257,12 @@ public function evenEmpty() {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['grouping'] = array('default' => array());
+    $options['grouping'] = ['default' => []];
     if ($this->usesRowClass()) {
-      $options['row_class'] = array('default' => '');
-      $options['default_row_class'] = array('default' => TRUE);
+      $options['row_class'] = ['default' => ''];
+      $options['default_row_class'] = ['default' => TRUE];
     }
-    $options['uses_fields'] = array('default' => FALSE);
+    $options['uses_fields'] = ['default' => FALSE];
 
     return $options;
   }
@@ -277,7 +277,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     // to FALSE.
     // @TODO: Document "usesGrouping" in docs.php when docs.php is written.
     if ($this->usesFields() && $this->usesGrouping()) {
-      $options = array('' => $this->t('- None -'));
+      $options = ['' => $this->t('- None -')];
       $field_labels = $this->displayHandler->getFieldLabels(TRUE);
       $options += $field_labels;
       // If there are no fields, we can't group on them.
@@ -286,7 +286,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         // select form.
         if (is_string($this->options['grouping'])) {
           $grouping = $this->options['grouping'];
-          $this->options['grouping'] = array();
+          $this->options['grouping'] = [];
           $this->options['grouping'][0]['field'] = $grouping;
         }
         if (isset($this->options['group_rendered']) && is_string($this->options['group_rendered'])) {
@@ -297,67 +297,67 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
         $c = count($this->options['grouping']);
         // Add a form for every grouping, plus one.
         for ($i = 0; $i <= $c; $i++) {
-          $grouping = !empty($this->options['grouping'][$i]) ? $this->options['grouping'][$i] : array();
-          $grouping += array('field' => '', 'rendered' => TRUE, 'rendered_strip' => FALSE);
-          $form['grouping'][$i]['field'] = array(
+          $grouping = !empty($this->options['grouping'][$i]) ? $this->options['grouping'][$i] : [];
+          $grouping += ['field' => '', 'rendered' => TRUE, 'rendered_strip' => FALSE];
+          $form['grouping'][$i]['field'] = [
             '#type' => 'select',
-            '#title' => $this->t('Grouping field Nr.@number', array('@number' => $i + 1)),
+            '#title' => $this->t('Grouping field Nr.@number', ['@number' => $i + 1]),
             '#options' => $options,
             '#default_value' => $grouping['field'],
             '#description' => $this->t('You may optionally specify a field by which to group the records. Leave blank to not group.'),
-          );
-          $form['grouping'][$i]['rendered'] = array(
+          ];
+          $form['grouping'][$i]['rendered'] = [
             '#type' => 'checkbox',
             '#title' => $this->t('Use rendered output to group rows'),
             '#default_value' => $grouping['rendered'],
             '#description' => $this->t('If enabled the rendered output of the grouping field is used to group the rows.'),
-            '#states' => array(
-              'invisible' => array(
-                ':input[name="style_options[grouping][' . $i . '][field]"]' => array('value' => ''),
-              ),
-            ),
-          );
-          $form['grouping'][$i]['rendered_strip'] = array(
+            '#states' => [
+              'invisible' => [
+                ':input[name="style_options[grouping][' . $i . '][field]"]' => ['value' => ''],
+              ],
+            ],
+          ];
+          $form['grouping'][$i]['rendered_strip'] = [
             '#type' => 'checkbox',
             '#title' => $this->t('Remove tags from rendered output'),
             '#default_value' => $grouping['rendered_strip'],
-            '#states' => array(
-              'invisible' => array(
-                ':input[name="style_options[grouping][' . $i . '][field]"]' => array('value' => ''),
-              ),
-            ),
-          );
+            '#states' => [
+              'invisible' => [
+                ':input[name="style_options[grouping][' . $i . '][field]"]' => ['value' => ''],
+              ],
+            ],
+          ];
         }
       }
     }
 
     if ($this->usesRowClass()) {
-      $form['row_class'] = array(
+      $form['row_class'] = [
         '#title' => $this->t('Row class'),
         '#description' => $this->t('The class to provide on each row.'),
         '#type' => 'textfield',
         '#default_value' => $this->options['row_class'],
-      );
+      ];
 
       if ($this->usesFields()) {
         $form['row_class']['#description'] .= ' ' . $this->t('You may use field tokens from as per the "Replacement patterns" used in "Rewrite the output of this field" for all fields.');
       }
 
-      $form['default_row_class'] = array(
+      $form['default_row_class'] = [
         '#title' => $this->t('Add views row classes'),
-        '#description' => $this->t('Add the default row classes like @classes to the output. You can use this to quickly reduce the amount of markup the view provides by default, at the cost of making it more difficult to apply CSS.', array('@classes' => 'views-row')),
+        '#description' => $this->t('Add the default row classes like @classes to the output. You can use this to quickly reduce the amount of markup the view provides by default, at the cost of making it more difficult to apply CSS.', ['@classes' => 'views-row']),
         '#type' => 'checkbox',
         '#default_value' => $this->options['default_row_class'],
-      );
+      ];
     }
 
     if (!$this->usesFields() || !empty($this->options['uses_fields'])) {
-      $form['uses_fields'] = array(
+      $form['uses_fields'] = [
         '#type' => 'checkbox',
         '#title' => $this->t('Force using fields'),
         '#description' => $this->t('If neither the row nor the style plugin supports fields, this field allows to enable them, so you can for example use groupby.'),
         '#default_value' => $this->options['uses_fields'],
-      );
+      ];
     }
   }
 
@@ -366,12 +366,12 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    */
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
     // Don't run validation on style plugins without the grouping setting.
-    if ($form_state->hasValue(array('style_options', 'grouping'))) {
+    if ($form_state->hasValue(['style_options', 'grouping'])) {
       // Don't save grouping if no field is specified.
-      $groupings = $form_state->getValue(array('style_options', 'grouping'));
+      $groupings = $form_state->getValue(['style_options', 'grouping']);
       foreach ($groupings as $index => $grouping) {
         if (empty($grouping['field'])) {
-          $form_state->unsetValue(array('style_options', 'grouping', $index));
+          $form_state->unsetValue(['style_options', 'grouping', $index]);
         }
       }
     }
@@ -442,12 +442,12 @@ public function preRender($result) {
    * @return array
    *   The render array containing the single group theme output.
    */
-  protected function renderRowGroup(array $rows = array()) {
-    return array(
+  protected function renderRowGroup(array $rows = []) {
+    return [
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,
       '#rows' => $rows,
-    );
+    ];
   }
 
   /**
@@ -486,7 +486,7 @@ public function render() {
    *   Rendered output of given grouping sets.
    */
   public function renderGroupingSets($sets) {
-    $output = array();
+    $output = [];
     $theme_functions = $this->view->buildThemeFunctions($this->groupingTheme);
     foreach ($sets as $set) {
       $level = isset($set['level']) ? $set['level'] : 0;
@@ -494,12 +494,12 @@ public function renderGroupingSets($sets) {
       $row = reset($set['rows']);
       // Render as a grouping set.
       if (is_array($row) && isset($row['group'])) {
-        $single_output = array(
+        $single_output = [
           '#theme' => $theme_functions,
           '#view' => $this->view,
           '#grouping' => $this->options['grouping'][$level],
           '#rows' => $set['rows'],
-        );
+        ];
       }
       // Render as a record set.
       else {
@@ -562,17 +562,17 @@ public function renderGroupingSets($sets) {
    *   )
    *   @endcode
    */
-  public function renderGrouping($records, $groupings = array(), $group_rendered = NULL) {
+  public function renderGrouping($records, $groupings = [], $group_rendered = NULL) {
     // This is for backward compatibility, when $groupings was a string
     // containing the ID of a single field.
     if (is_string($groupings)) {
       $rendered = $group_rendered === NULL ? TRUE : $group_rendered;
-      $groupings = array(array('field' => $groupings, 'rendered' => $rendered));
+      $groupings = [['field' => $groupings, 'rendered' => $rendered]];
     }
 
     // Make sure fields are rendered
     $this->renderFields($this->view->result);
-    $sets = array();
+    $sets = [];
     if ($groupings) {
       foreach ($records as $index => $row) {
         // Iterate through configured grouping fields to determine the
@@ -613,7 +613,7 @@ public function renderGrouping($records, $groupings = array(), $group_rendered =
           if (empty($set[$grouping])) {
             $set[$grouping]['group'] = $group_content;
             $set[$grouping]['level'] = $level;
-            $set[$grouping]['rows'] = array();
+            $set[$grouping]['rows'] = [];
           }
 
           // Move the set reference into the row set of the group we just determined.
@@ -625,17 +625,17 @@ public function renderGrouping($records, $groupings = array(), $group_rendered =
     }
     else {
       // Create a single group with an empty grouping field.
-      $sets[''] = array(
+      $sets[''] = [
         'group' => '',
         'rows' => $records,
-      );
+      ];
     }
 
     // If this parameter isn't explicitly set, modify the output to be fully
     // backward compatible to code before Views 7.x-3.0-rc2.
     // @TODO Remove this as soon as possible e.g. October 2020
     if ($group_rendered === NULL) {
-      $old_style_sets = array();
+      $old_style_sets = [];
       foreach ($sets as $group) {
         $old_style_sets[$group['group']] = $group['rows'];
       }
@@ -806,7 +806,7 @@ public function validate() {
     if ($this->usesRowPlugin()) {
       $plugin = $this->displayHandler->getPlugin('row');
       if (empty($plugin)) {
-        $errors[] = $this->t('Style @style requires a row style but the row plugin is invalid.', array('@style' => $this->definition['title']));
+        $errors[] = $this->t('Style @style requires a row style but the row plugin is invalid.', ['@style' => $this->definition['title']]);
       }
       else {
         $result = $plugin->validate();
diff --git a/core/modules/views/src/Plugin/views/style/Table.php b/core/modules/views/src/Plugin/views/style/Table.php
index c49f6e984f02c5eb8b99df561cc8d81d5e227c10..00e28b3c6dc46bde4276e17c5ac4b1c32465a478 100644
--- a/core/modules/views/src/Plugin/views/style/Table.php
+++ b/core/modules/views/src/Plugin/views/style/Table.php
@@ -65,16 +65,16 @@ class Table extends StylePluginBase implements CacheableDependencyInterface {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['columns'] = array('default' => array());
-    $options['default'] = array('default' => '');
-    $options['info'] = array('default' => array());
-    $options['override'] = array('default' => TRUE);
-    $options['sticky'] = array('default' => FALSE);
-    $options['order'] = array('default' => 'asc');
-    $options['caption'] = array('default' => '');
-    $options['summary'] = array('default' => '');
-    $options['description'] = array('default' => '');
-    $options['empty_table'] = array('default' => FALSE);
+    $options['columns'] = ['default' => []];
+    $options['default'] = ['default' => ''];
+    $options['info'] = ['default' => []];
+    $options['override'] = ['default' => TRUE];
+    $options['sticky'] = ['default' => FALSE];
+    $options['order'] = ['default' => 'asc'];
+    $options['caption'] = ['default' => ''];
+    $options['summary'] = ['default' => ''];
+    $options['description'] = ['default' => ''];
+    $options['empty_table'] = ['default' => FALSE];
 
     return $options;
   }
@@ -165,7 +165,7 @@ public function buildSortPost() {
    *    An array of all the sanitized columns.
    */
   public function sanitizeColumns($columns, $fields = NULL) {
-    $sanitized = array();
+    $sanitized = [];
     if ($fields === NULL) {
       $fields = $this->displayHandler->getOption('fields');
     }
@@ -202,57 +202,57 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
     $handlers = $this->displayHandler->getHandlers('field');
     if (empty($handlers)) {
-      $form['error_markup'] = array(
+      $form['error_markup'] = [
         '#markup' => '<div class="messages messages--error">' . $this->t('You need at least one field before you can configure your table settings') . '</div>',
-      );
+      ];
       return;
     }
 
-    $form['override'] = array(
+    $form['override'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Override normal sorting if click sorting is used'),
       '#default_value' => !empty($this->options['override']),
-    );
+    ];
 
-    $form['sticky'] = array(
+    $form['sticky'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Enable Drupal style "sticky" table headers (Javascript)'),
       '#default_value' => !empty($this->options['sticky']),
       '#description' => $this->t('(Sticky header effects will not be active for preview below, only on live output.)'),
-    );
+    ];
 
-    $form['caption'] = array(
+    $form['caption'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Caption for the table'),
       '#description' => $this->t('A title semantically associated with your table for increased accessibility.'),
       '#default_value' => $this->options['caption'],
       '#maxlength' => 255,
-    );
+    ];
 
-    $form['accessibility_details'] = array(
+    $form['accessibility_details'] = [
       '#type' => 'details',
       '#title' => $this->t('Table details'),
-    );
+    ];
 
-    $form['summary'] = array(
+    $form['summary'] = [
       '#title' => $this->t('Summary title'),
       '#type' => 'textfield',
       '#default_value' => $this->options['summary'],
       '#fieldset' => 'accessibility_details',
-    );
+    ];
 
-    $form['description'] = array(
+    $form['description'] = [
       '#title' => $this->t('Table description'),
       '#type' => 'textarea',
       '#description' => $this->t('Provide additional details about the table to increase accessibility.'),
       '#default_value' => $this->options['description'],
-      '#states' => array(
-        'visible' => array(
-          'input[name="style_options[summary]"]' => array('filled' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          'input[name="style_options[summary]"]' => ['filled' => TRUE],
+        ],
+      ],
       '#fieldset' => 'accessibility_details',
-    );
+    ];
 
     // Note: views UI registers this theme handler on our behalf. Your module
     // will have to register your theme handlers if you do stuff like this.
@@ -276,137 +276,137 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     foreach ($columns as $field => $column) {
       $column_selector = ':input[name="style_options[columns][' . $field . ']"]';
 
-      $form['columns'][$field] = array(
-        '#title' => $this->t('Columns for @field', array('@field' => $field)),
+      $form['columns'][$field] = [
+        '#title' => $this->t('Columns for @field', ['@field' => $field]),
         '#title_display' => 'invisible',
         '#type' => 'select',
         '#options' => $field_names,
         '#default_value' => $column,
-      );
+      ];
       if ($handlers[$field]->clickSortable()) {
-        $form['info'][$field]['sortable'] = array(
-          '#title' => $this->t('Sortable for @field', array('@field' => $field)),
+        $form['info'][$field]['sortable'] = [
+          '#title' => $this->t('Sortable for @field', ['@field' => $field]),
           '#title_display' => 'invisible',
           '#type' => 'checkbox',
           '#default_value' => !empty($this->options['info'][$field]['sortable']),
-          '#states' => array(
-            'visible' => array(
-              $column_selector => array('value' => $field),
-            ),
-          ),
-        );
-        $form['info'][$field]['default_sort_order'] = array(
-          '#title' => $this->t('Default sort order for @field', array('@field' => $field)),
+          '#states' => [
+            'visible' => [
+              $column_selector => ['value' => $field],
+            ],
+          ],
+        ];
+        $form['info'][$field]['default_sort_order'] = [
+          '#title' => $this->t('Default sort order for @field', ['@field' => $field]),
           '#title_display' => 'invisible',
           '#type' => 'select',
-          '#options' => array('asc' => $this->t('Ascending'), 'desc' => $this->t('Descending')),
+          '#options' => ['asc' => $this->t('Ascending'), 'desc' => $this->t('Descending')],
           '#default_value' => !empty($this->options['info'][$field]['default_sort_order']) ? $this->options['info'][$field]['default_sort_order'] : 'asc',
-          '#states' => array(
-            'visible' => array(
-              $column_selector => array('value' => $field),
-              ':input[name="style_options[info][' . $field . '][sortable]"]' => array('checked' => TRUE),
-            ),
-          ),
-        );
+          '#states' => [
+            'visible' => [
+              $column_selector => ['value' => $field],
+              ':input[name="style_options[info][' . $field . '][sortable]"]' => ['checked' => TRUE],
+            ],
+          ],
+        ];
         // Provide an ID so we can have such things.
         $radio_id = Html::getUniqueId('edit-default-' . $field);
-        $form['default'][$field] = array(
-          '#title' => $this->t('Default sort for @field', array('@field' => $field)),
+        $form['default'][$field] = [
+          '#title' => $this->t('Default sort for @field', ['@field' => $field]),
           '#title_display' => 'invisible',
           '#type' => 'radio',
           '#return_value' => $field,
-          '#parents' => array('style_options', 'default'),
+          '#parents' => ['style_options', 'default'],
           '#id' => $radio_id,
           // because 'radio' doesn't fully support '#id' =(
-          '#attributes' => array('id' => $radio_id),
+          '#attributes' => ['id' => $radio_id],
           '#default_value' => $default,
-          '#states' => array(
-            'visible' => array(
-              $column_selector => array('value' => $field),
-            ),
-          ),
-        );
+          '#states' => [
+            'visible' => [
+              $column_selector => ['value' => $field],
+            ],
+          ],
+        ];
       }
-      $form['info'][$field]['align'] = array(
-        '#title' => $this->t('Alignment for @field', array('@field' => $field)),
+      $form['info'][$field]['align'] = [
+        '#title' => $this->t('Alignment for @field', ['@field' => $field]),
         '#title_display' => 'invisible',
         '#type' => 'select',
         '#default_value' => !empty($this->options['info'][$field]['align']) ? $this->options['info'][$field]['align'] : '',
-        '#options' => array(
+        '#options' => [
           '' => $this->t('None'),
-          'views-align-left' => $this->t('Left', array(), array('context' => 'Text alignment')),
-          'views-align-center' => $this->t('Center', array(), array('context' => 'Text alignment')),
-          'views-align-right' => $this->t('Right', array(), array('context' => 'Text alignment')),
-          ),
-        '#states' => array(
-          'visible' => array(
-            $column_selector => array('value' => $field),
-          ),
-        ),
-      );
-      $form['info'][$field]['separator'] = array(
-        '#title' => $this->t('Separator for @field', array('@field' => $field)),
+          'views-align-left' => $this->t('Left', [], ['context' => 'Text alignment']),
+          'views-align-center' => $this->t('Center', [], ['context' => 'Text alignment']),
+          'views-align-right' => $this->t('Right', [], ['context' => 'Text alignment']),
+          ],
+        '#states' => [
+          'visible' => [
+            $column_selector => ['value' => $field],
+          ],
+        ],
+      ];
+      $form['info'][$field]['separator'] = [
+        '#title' => $this->t('Separator for @field', ['@field' => $field]),
         '#title_display' => 'invisible',
         '#type' => 'textfield',
         '#size' => 10,
         '#default_value' => isset($this->options['info'][$field]['separator']) ? $this->options['info'][$field]['separator'] : '',
-        '#states' => array(
-          'visible' => array(
-            $column_selector => array('value' => $field),
-          ),
-        ),
-      );
-      $form['info'][$field]['empty_column'] = array(
-        '#title' => $this->t('Hide empty column for @field', array('@field' => $field)),
+        '#states' => [
+          'visible' => [
+            $column_selector => ['value' => $field],
+          ],
+        ],
+      ];
+      $form['info'][$field]['empty_column'] = [
+        '#title' => $this->t('Hide empty column for @field', ['@field' => $field]),
         '#title_display' => 'invisible',
         '#type' => 'checkbox',
         '#default_value' => isset($this->options['info'][$field]['empty_column']) ? $this->options['info'][$field]['empty_column'] : FALSE,
-        '#states' => array(
-          'visible' => array(
-            $column_selector => array('value' => $field),
-          ),
-        ),
-      );
-      $form['info'][$field]['responsive'] = array(
-        '#title' => $this->t('Responsive setting for @field', array('@field' => $field)),
+        '#states' => [
+          'visible' => [
+            $column_selector => ['value' => $field],
+          ],
+        ],
+      ];
+      $form['info'][$field]['responsive'] = [
+        '#title' => $this->t('Responsive setting for @field', ['@field' => $field]),
         '#title_display' => 'invisible',
         '#type' => 'select',
         '#default_value' => isset($this->options['info'][$field]['responsive']) ? $this->options['info'][$field]['responsive'] : '',
-        '#options' => array('' => $this->t('High'), RESPONSIVE_PRIORITY_MEDIUM => $this->t('Medium'), RESPONSIVE_PRIORITY_LOW => $this->t('Low')),
-        '#states' => array(
-          'visible' => array(
-            $column_selector => array('value' => $field),
-          ),
-        ),
-      );
+        '#options' => ['' => $this->t('High'), RESPONSIVE_PRIORITY_MEDIUM => $this->t('Medium'), RESPONSIVE_PRIORITY_LOW => $this->t('Low')],
+        '#states' => [
+          'visible' => [
+            $column_selector => ['value' => $field],
+          ],
+        ],
+      ];
 
       // markup for the field name
-      $form['info'][$field]['name'] = array(
+      $form['info'][$field]['name'] = [
         '#markup' => $field_names[$field],
-      );
+      ];
     }
 
     // Provide a radio for no default sort
-    $form['default'][-1] = array(
+    $form['default'][-1] = [
       '#title' => $this->t('No default sort'),
       '#title_display' => 'invisible',
       '#type' => 'radio',
       '#return_value' => -1,
-      '#parents' => array('style_options', 'default'),
+      '#parents' => ['style_options', 'default'],
       '#id' => 'edit-default-0',
       '#default_value' => $default,
-    );
+    ];
 
-    $form['empty_table'] = array(
+    $form['empty_table'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Show the empty text in the table'),
       '#default_value' => $this->options['empty_table'],
       '#description' => $this->t('Per default the table is hidden for an empty view. With this option it is possible to show an empty table with the text in it.'),
-    );
+    ];
 
-    $form['description_markup'] = array(
+    $form['description_markup'] = [
       '#markup' => '<div class="js-form-item form-item description">' . $this->t('Place fields into columns; you may combine multiple fields into the same column. If you do, the separator in the column specified will be used to separate the fields. Check the sortable box to make that column click sortable, and check the default sort radio to determine which column will be sorted by default, if any. You may control column order and field labels in the fields section.') . '</div>',
-    );
+    ];
   }
 
   public function evenEmpty() {
diff --git a/core/modules/views/src/Plugin/views/style/UnformattedSummary.php b/core/modules/views/src/Plugin/views/style/UnformattedSummary.php
index b6b6d6e46fb1a2cb8018199e7cb901992d29bde9..6460841afb2df78d63b9081728671c203ab2a219 100644
--- a/core/modules/views/src/Plugin/views/style/UnformattedSummary.php
+++ b/core/modules/views/src/Plugin/views/style/UnformattedSummary.php
@@ -21,23 +21,23 @@ class UnformattedSummary extends DefaultSummary {
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['inline'] = array('default' => FALSE);
-    $options['separator'] = array('default' => '');
+    $options['inline'] = ['default' => FALSE];
+    $options['separator'] = ['default' => ''];
     return $options;
   }
 
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
-    $form['inline'] = array(
+    $form['inline'] = [
       '#type' => 'checkbox',
       '#default_value' => !empty($this->options['inline']),
       '#title' => $this->t('Display items inline'),
-    );
-    $form['separator'] = array(
+    ];
+    $form['separator'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Separator'),
       '#default_value' => $this->options['separator'],
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Plugin/views/wizard/WizardPluginBase.php b/core/modules/views/src/Plugin/views/wizard/WizardPluginBase.php
index aab57a6980aa537eb991662743bdb6d33a8750ab..1771c710ea25403de5e2e4fdd21883e266ffc064 100644
--- a/core/modules/views/src/Plugin/views/wizard/WizardPluginBase.php
+++ b/core/modules/views/src/Plugin/views/wizard/WizardPluginBase.php
@@ -66,7 +66,7 @@ abstract class WizardPluginBase extends PluginBase implements WizardInterface {
    *
    * @var array
    */
-  protected $validated_views = array();
+  protected $validated_views = [];
 
   /**
    * The table column used for sorting by create date of this wizard.
@@ -80,21 +80,21 @@ abstract class WizardPluginBase extends PluginBase implements WizardInterface {
    *
    * @var array
    */
-  protected $filters = array();
+  protected $filters = [];
 
   /**
    * Views items configuration arrays for sorts added by the wizard.
    *
    * @var array
    */
-  protected $sorts = array();
+  protected $sorts = [];
 
   /**
    * The available store criteria.
    *
    * @var array
    */
-  protected $availableSorts = array();
+  protected $availableSorts = [];
 
   /**
    * Default values for filters.
@@ -104,11 +104,11 @@ abstract class WizardPluginBase extends PluginBase implements WizardInterface {
    *
    * @var array()
    */
-  protected $filter_defaults = array(
+  protected $filter_defaults = [
     'id' => NULL,
-    'expose' => array('operator' => FALSE),
+    'expose' => ['operator' => FALSE],
     'group' => 1,
-  );
+  ];
 
   /**
    * The bundle info service.
@@ -163,7 +163,7 @@ public function getCreatedColumn() {
    * @return array
    */
   public function getFilters() {
-    $filters = array();
+    $filters = [];
 
     $default = $this->filter_defaults;
 
@@ -197,100 +197,100 @@ public function getSorts() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $style_options = Views::fetchPluginNames('style', 'normal', array($this->base_table));
-    $feed_row_options = Views::fetchPluginNames('row', 'feed', array($this->base_table));
+    $style_options = Views::fetchPluginNames('style', 'normal', [$this->base_table]);
+    $feed_row_options = Views::fetchPluginNames('row', 'feed', [$this->base_table]);
     $path_prefix = $this->url('<none>', [], ['absolute' => TRUE]);
 
     // Add filters and sorts which apply to the view as a whole.
     $this->buildFilters($form, $form_state);
     $this->buildSorts($form, $form_state);
 
-    $form['displays']['page'] = array(
+    $form['displays']['page'] = [
       '#type' => 'fieldset',
       '#title' => $this->t('Page settings'),
-      '#attributes' => array('class' => array('views-attachment', 'fieldset-no-legend')),
+      '#attributes' => ['class' => ['views-attachment', 'fieldset-no-legend']],
       '#tree' => TRUE,
-    );
-    $form['displays']['page']['create'] = array(
+    ];
+    $form['displays']['page']['create'] = [
       '#title' => $this->t('Create a page'),
       '#type' => 'checkbox',
-      '#attributes' => array('class' => array('strong')),
+      '#attributes' => ['class' => ['strong']],
       '#default_value' => FALSE,
       '#id' => 'edit-page-create',
-    );
+    ];
 
     // All options for the page display are included in this container so they
     // can be hidden as a group when the "Create a page" checkbox is unchecked.
-    $form['displays']['page']['options'] = array(
+    $form['displays']['page']['options'] = [
       '#type' => 'container',
-      '#attributes' => array('class' => array('options-set')),
-      '#states' => array(
-        'visible' => array(
-          ':input[name="page[create]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#attributes' => ['class' => ['options-set']],
+      '#states' => [
+        'visible' => [
+          ':input[name="page[create]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#prefix' => '<div><div id="edit-page-wrapper">',
       '#suffix' => '</div></div>',
-      '#parents' => array('page'),
-    );
+      '#parents' => ['page'],
+    ];
 
-    $form['displays']['page']['options']['title'] = array(
+    $form['displays']['page']['options']['title'] = [
       '#title' => $this->t('Page title'),
       '#type' => 'textfield',
       '#maxlength' => 255,
-    );
-    $form['displays']['page']['options']['path'] = array(
+    ];
+    $form['displays']['page']['options']['path'] = [
       '#title' => $this->t('Path'),
       '#type' => 'textfield',
       '#field_prefix' => $path_prefix,
       // Account for the leading backslash.
       '#maxlength' => 254,
-    );
-    $form['displays']['page']['options']['style'] = array(
+    ];
+    $form['displays']['page']['options']['style'] = [
       '#type' => 'fieldset',
       '#title' => $this->t('Page display settings'),
-      '#attributes' => array('class' => array('container-inline', 'fieldset-no-legend')),
-    );
+      '#attributes' => ['class' => ['container-inline', 'fieldset-no-legend']],
+    ];
 
     // Create the dropdown for choosing the display format.
-    $form['displays']['page']['options']['style']['style_plugin'] = array(
+    $form['displays']['page']['options']['style']['style_plugin'] = [
       '#title' => $this->t('Display format'),
       '#type' => 'select',
       '#options' => $style_options,
-    );
+    ];
     $style_form = &$form['displays']['page']['options']['style'];
-    $style_form['style_plugin']['#default_value'] = static::getSelected($form_state, array('page', 'style', 'style_plugin'), 'default', $style_form['style_plugin']);
+    $style_form['style_plugin']['#default_value'] = static::getSelected($form_state, ['page', 'style', 'style_plugin'], 'default', $style_form['style_plugin']);
     // Changing this dropdown updates $form['displays']['page']['options'] via
     // AJAX.
-    views_ui_add_ajax_trigger($style_form, 'style_plugin', array('displays', 'page', 'options'));
+    views_ui_add_ajax_trigger($style_form, 'style_plugin', ['displays', 'page', 'options']);
 
     $this->buildFormStyle($form, $form_state, 'page');
-    $form['displays']['page']['options']['items_per_page'] = array(
+    $form['displays']['page']['options']['items_per_page'] = [
       '#title' => $this->t('Items to display'),
       '#type' => 'number',
       '#default_value' => 10,
       '#min' => 0,
-    );
-    $form['displays']['page']['options']['pager'] = array(
+    ];
+    $form['displays']['page']['options']['pager'] = [
       '#title' => $this->t('Use a pager'),
       '#type' => 'checkbox',
       '#default_value' => TRUE,
-    );
-    $form['displays']['page']['options']['link'] = array(
+    ];
+    $form['displays']['page']['options']['link'] = [
       '#title' => $this->t('Create a menu link'),
       '#type' => 'checkbox',
       '#id' => 'edit-page-link',
-    );
-    $form['displays']['page']['options']['link_properties'] = array(
+    ];
+    $form['displays']['page']['options']['link_properties'] = [
       '#type' => 'container',
-      '#states' => array(
-        'visible' => array(
-          ':input[name="page[link]"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="page[link]"]' => ['checked' => TRUE],
+        ],
+      ],
       '#prefix' => '<div id="edit-page-link-properties-wrapper">',
       '#suffix' => '</div>',
-    );
+    ];
     if (\Drupal::moduleHandler()->moduleExists('menu_ui')) {
       $menu_options = menu_ui_get_menus();
     }
@@ -301,162 +301,162 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         $menu_options[$name] = $this->t($title);
       }
     }
-    $form['displays']['page']['options']['link_properties']['menu_name'] = array(
+    $form['displays']['page']['options']['link_properties']['menu_name'] = [
       '#title' => $this->t('Menu'),
       '#type' => 'select',
       '#options' => $menu_options,
-    );
-    $form['displays']['page']['options']['link_properties']['title'] = array(
+    ];
+    $form['displays']['page']['options']['link_properties']['title'] = [
       '#title' => $this->t('Link text'),
       '#type' => 'textfield',
-    );
+    ];
     // Only offer a feed if we have at least one available feed row style.
     if ($feed_row_options) {
-      $form['displays']['page']['options']['feed'] = array(
+      $form['displays']['page']['options']['feed'] = [
         '#title' => $this->t('Include an RSS feed'),
         '#type' => 'checkbox',
         '#id' => 'edit-page-feed',
-      );
-      $form['displays']['page']['options']['feed_properties'] = array(
+      ];
+      $form['displays']['page']['options']['feed_properties'] = [
         '#type' => 'container',
-        '#states' => array(
-          'visible' => array(
-            ':input[name="page[feed]"]' => array('checked' => TRUE),
-          ),
-        ),
+        '#states' => [
+          'visible' => [
+            ':input[name="page[feed]"]' => ['checked' => TRUE],
+          ],
+        ],
         '#prefix' => '<div id="edit-page-feed-properties-wrapper">',
         '#suffix' => '</div>',
-      );
-      $form['displays']['page']['options']['feed_properties']['path'] = array(
+      ];
+      $form['displays']['page']['options']['feed_properties']['path'] = [
         '#title' => $this->t('Feed path'),
         '#type' => 'textfield',
         '#field_prefix' => $path_prefix,
         // Account for the leading backslash.
         '#maxlength' => 254,
-      );
+      ];
       // This will almost never be visible.
-      $form['displays']['page']['options']['feed_properties']['row_plugin'] = array(
+      $form['displays']['page']['options']['feed_properties']['row_plugin'] = [
         '#title' => $this->t('Feed row style'),
         '#type' => 'select',
         '#options' => $feed_row_options,
         '#default_value' => key($feed_row_options),
         '#access' => (count($feed_row_options) > 1),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="page[feed]"]' => array('checked' => TRUE),
-          ),
-        ),
+        '#states' => [
+          'visible' => [
+            ':input[name="page[feed]"]' => ['checked' => TRUE],
+          ],
+        ],
         '#prefix' => '<div id="edit-page-feed-properties-row-plugin-wrapper">',
         '#suffix' => '</div>',
-      );
+      ];
     }
 
     // Only offer the block settings if the module is enabled.
     if (\Drupal::moduleHandler()->moduleExists('block')) {
-      $form['displays']['block'] = array(
+      $form['displays']['block'] = [
         '#type' => 'fieldset',
         '#title' => $this->t('Block settings'),
-        '#attributes' => array('class' => array('views-attachment', 'fieldset-no-legend')),
+        '#attributes' => ['class' => ['views-attachment', 'fieldset-no-legend']],
         '#tree' => TRUE,
-      );
-      $form['displays']['block']['create'] = array(
+      ];
+      $form['displays']['block']['create'] = [
         '#title' => $this->t('Create a block'),
         '#type' => 'checkbox',
-        '#attributes' => array('class' => array('strong')),
+        '#attributes' => ['class' => ['strong']],
         '#id' => 'edit-block-create',
-      );
+      ];
 
       // All options for the block display are included in this container so
       // they can be hidden as a group when the "Create a block" checkbox is
       // unchecked.
-      $form['displays']['block']['options'] = array(
+      $form['displays']['block']['options'] = [
         '#type' => 'container',
-        '#attributes' => array('class' => array('options-set')),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="block[create]"]' => array('checked' => TRUE),
-          ),
-        ),
+        '#attributes' => ['class' => ['options-set']],
+        '#states' => [
+          'visible' => [
+            ':input[name="block[create]"]' => ['checked' => TRUE],
+          ],
+        ],
         '#prefix' => '<div id="edit-block-wrapper">',
         '#suffix' => '</div>',
-        '#parents' => array('block'),
-      );
+        '#parents' => ['block'],
+      ];
 
-      $form['displays']['block']['options']['title'] = array(
+      $form['displays']['block']['options']['title'] = [
         '#title' => $this->t('Block title'),
         '#type' => 'textfield',
         '#maxlength' => 255,
-      );
-      $form['displays']['block']['options']['style'] = array(
+      ];
+      $form['displays']['block']['options']['style'] = [
         '#type' => 'fieldset',
         '#title' => $this->t('Block display settings'),
-        '#attributes' => array('class' => array('container-inline', 'fieldset-no-legend')),
-      );
+        '#attributes' => ['class' => ['container-inline', 'fieldset-no-legend']],
+      ];
 
       // Create the dropdown for choosing the display format.
-      $form['displays']['block']['options']['style']['style_plugin'] = array(
+      $form['displays']['block']['options']['style']['style_plugin'] = [
         '#title' => $this->t('Display format'),
         '#type' => 'select',
         '#options' => $style_options,
-      );
+      ];
       $style_form = &$form['displays']['block']['options']['style'];
-      $style_form['style_plugin']['#default_value'] = static::getSelected($form_state, array('block', 'style', 'style_plugin'), 'default', $style_form['style_plugin']);
+      $style_form['style_plugin']['#default_value'] = static::getSelected($form_state, ['block', 'style', 'style_plugin'], 'default', $style_form['style_plugin']);
       // Changing this dropdown updates $form['displays']['block']['options']
       // via AJAX.
-      views_ui_add_ajax_trigger($style_form, 'style_plugin', array('displays', 'block', 'options'));
+      views_ui_add_ajax_trigger($style_form, 'style_plugin', ['displays', 'block', 'options']);
 
       $this->buildFormStyle($form, $form_state, 'block');
-      $form['displays']['block']['options']['items_per_page'] = array(
+      $form['displays']['block']['options']['items_per_page'] = [
         '#title' => $this->t('Items per block'),
         '#type' => 'number',
         '#default_value' => 5,
         '#min' => 0,
-      );
-      $form['displays']['block']['options']['pager'] = array(
+      ];
+      $form['displays']['block']['options']['pager'] = [
         '#title' => $this->t('Use a pager'),
         '#type' => 'checkbox',
         '#default_value' => FALSE,
-      );
+      ];
     }
 
     // Only offer the REST export settings if the module is enabled.
     if (\Drupal::moduleHandler()->moduleExists('rest')) {
-      $form['displays']['rest_export'] = array(
+      $form['displays']['rest_export'] = [
         '#type' => 'fieldset',
         '#title' => $this->t('REST export settings'),
-        '#attributes' => array('class' => array('views-attachment', 'fieldset-no-legend')),
+        '#attributes' => ['class' => ['views-attachment', 'fieldset-no-legend']],
         '#tree' => TRUE,
-      );
-      $form['displays']['rest_export']['create'] = array(
+      ];
+      $form['displays']['rest_export']['create'] = [
         '#title' => $this->t('Provide a REST export'),
         '#type' => 'checkbox',
-        '#attributes' => array('class' => array('strong')),
+        '#attributes' => ['class' => ['strong']],
         '#id' => 'edit-rest-export-create',
-      );
+      ];
 
       // All options for the REST export display are included in this container
       // so they can be hidden as a group when the "Provide a REST export"
       // checkbox is unchecked.
-      $form['displays']['rest_export']['options'] = array(
+      $form['displays']['rest_export']['options'] = [
         '#type' => 'container',
-        '#attributes' => array('class' => array('options-set')),
-        '#states' => array(
-          'visible' => array(
-            ':input[name="rest_export[create]"]' => array('checked' => TRUE),
-          ),
-        ),
+        '#attributes' => ['class' => ['options-set']],
+        '#states' => [
+          'visible' => [
+            ':input[name="rest_export[create]"]' => ['checked' => TRUE],
+          ],
+        ],
         '#prefix' => '<div id="edit-rest-export-wrapper">',
         '#suffix' => '</div>',
-        '#parents' => array('rest_export'),
-      );
+        '#parents' => ['rest_export'],
+      ];
 
-      $form['displays']['rest_export']['options']['path'] = array(
+      $form['displays']['rest_export']['options']['path'] = [
         '#title' => $this->t('REST export path'),
         '#type' => 'textfield',
         '#field_prefix' => $path_prefix,
         // Account for the leading backslash.
         '#maxlength' => 254,
-      );
+      ];
     }
 
     return $form;
@@ -561,28 +561,28 @@ protected function buildFormStyle(array &$form, FormStateInterface $form_state,
     $style_plugin = Views::pluginManager('style')->createInstance($style);
     if (isset($style_plugin) && $style_plugin->usesRowPlugin()) {
       $options = $this->rowStyleOptions();
-      $style_form['row_plugin'] = array(
+      $style_form['row_plugin'] = [
         '#type' => 'select',
         '#title' => $this->t('of'),
         '#options' => $options,
         '#access' => count($options) > 1,
-      );
+      ];
       // For the block display, the default value should be "titles (linked)",
       // if it's available (since that's the most common use case).
       $block_with_linked_titles_available = ($type == 'block' && isset($options['titles_linked']));
       $default_value = $block_with_linked_titles_available ? 'titles_linked' : key($options);
-      $style_form['row_plugin']['#default_value'] = static::getSelected($form_state, array($type, 'style', 'row_plugin'), $default_value, $style_form['row_plugin']);
+      $style_form['row_plugin']['#default_value'] = static::getSelected($form_state, [$type, 'style', 'row_plugin'], $default_value, $style_form['row_plugin']);
       // Changing this dropdown updates the individual row options via AJAX.
-      views_ui_add_ajax_trigger($style_form, 'row_plugin', array('displays', $type, 'options', 'style', 'row_options'));
+      views_ui_add_ajax_trigger($style_form, 'row_plugin', ['displays', $type, 'options', 'style', 'row_options']);
 
       // This is the region that can be updated by AJAX. The base class doesn't
       // add anything here, but child classes can.
-      $style_form['row_options'] = array(
-        '#theme_wrappers' => array('container'),
-      );
+      $style_form['row_options'] = [
+        '#theme_wrappers' => ['container'],
+      ];
     }
     elseif ($style_plugin->usesFields()) {
-      $style_form['row_plugin'] = array('#markup' => '<span>' . $this->t('of fields') . '</span>');
+      $style_form['row_plugin'] = ['#markup' => '<span>' . $this->t('of fields') . '</span>'];
     }
   }
 
@@ -594,7 +594,7 @@ protected function buildFormStyle(array &$form, FormStateInterface $form_state,
    */
   protected function rowStyleOptions() {
     // Get all available row plugins by default.
-    $options = Views::fetchPluginNames('row', 'normal', array($this->base_table));
+    $options = Views::fetchPluginNames('row', 'normal', [$this->base_table]);
     return $options;
   }
 
@@ -611,21 +611,21 @@ protected function buildFilters(&$form, FormStateInterface $form_state) {
     // If the current base table support bundles and has more than one (like user).
     if (!empty($bundles) && $this->entityType && $this->entityType->hasKey('bundle')) {
       // Get all bundles and their human readable names.
-      $options = array('all' => $this->t('All'));
+      $options = ['all' => $this->t('All')];
       foreach ($bundles as $type => $bundle) {
         $options[$type] = $bundle['label'];
       }
-      $form['displays']['show']['type'] = array(
+      $form['displays']['show']['type'] = [
         '#type' => 'select',
         '#title' => $this->t('of type'),
         '#options' => $options,
-      );
-      $selected_bundle = static::getSelected($form_state, array('show', 'type'), 'all', $form['displays']['show']['type']);
+      ];
+      $selected_bundle = static::getSelected($form_state, ['show', 'type'], 'all', $form['displays']['show']['type']);
       $form['displays']['show']['type']['#default_value'] = $selected_bundle;
       // Changing this dropdown updates the entire content of $form['displays']
       // via AJAX, since each bundle might have entirely different fields
       // attached to it, etc.
-      views_ui_add_ajax_trigger($form['displays']['show'], 'type', array('displays'));
+      views_ui_add_ajax_trigger($form['displays']['show'], 'type', ['displays']);
     }
   }
 
@@ -635,16 +635,16 @@ protected function buildFilters(&$form, FormStateInterface $form_state) {
    * By default, this adds a "sorted by [date]" filter (when it is available).
    */
   protected function buildSorts(&$form, FormStateInterface $form_state) {
-    $sorts = array(
+    $sorts = [
       'none' => $this->t('Unsorted'),
-    );
+    ];
     // Check if we are allowed to sort by creation date.
     $created_column = $this->getCreatedColumn();
     if ($created_column) {
-      $sorts += array(
+      $sorts += [
         $created_column . ':DESC' => $this->t('Newest first'),
         $created_column . ':ASC' => $this->t('Oldest first'),
-      );
+      ];
     }
     if ($available_sorts = $this->getAvailableSorts()) {
       $sorts += $available_sorts;
@@ -652,12 +652,12 @@ protected function buildSorts(&$form, FormStateInterface $form_state) {
 
     // If there is no sorts option available continue.
     if (!empty($sorts)) {
-      $form['displays']['show']['sort'] = array(
+      $form['displays']['show']['sort'] = [
         '#type' => 'select',
         '#title' => $this->t('sorted by'),
         '#options' => $sorts,
         '#default_value' => isset($created_column) ? $created_column . ':DESC' : 'none',
-      );
+      ];
     }
   }
 
@@ -669,13 +669,13 @@ protected function buildSorts(&$form, FormStateInterface $form_state) {
    */
   protected function instantiateView($form, FormStateInterface $form_state) {
     // Build the basic view properties and create the view.
-    $values = array(
+    $values = [
       'id' => $form_state->getValue('id'),
       'label' => $form_state->getValue('label'),
       'description' => $form_state->getValue('description'),
       'base_table' => $this->base_table,
       'langcode' => \Drupal::languageManager()->getDefaultLanguage()->getId(),
-    );
+    ];
 
     $view = View::create($values);
 
@@ -702,25 +702,25 @@ protected function instantiateView($form, FormStateInterface $form_state) {
   protected function buildDisplayOptions($form, FormStateInterface $form_state) {
     // Display: Master
     $display_options['default'] = $this->defaultDisplayOptions();
-    $display_options['default'] += array(
-      'filters' => array(),
-      'sorts' => array(),
-    );
+    $display_options['default'] += [
+      'filters' => [],
+      'sorts' => [],
+    ];
     $display_options['default']['filters'] += $this->defaultDisplayFilters($form, $form_state);
     $display_options['default']['sorts'] += $this->defaultDisplaySorts($form, $form_state);
 
     // Display: Page
-    if (!$form_state->isValueEmpty(array('page', 'create'))) {
+    if (!$form_state->isValueEmpty(['page', 'create'])) {
       $display_options['page'] = $this->pageDisplayOptions($form, $form_state);
 
       // Display: Feed (attached to the page)
-      if (!$form_state->isValueEmpty(array('page', 'feed'))) {
+      if (!$form_state->isValueEmpty(['page', 'feed'])) {
         $display_options['feed'] = $this->pageFeedDisplayOptions($form, $form_state);
       }
     }
 
     // Display: Block
-    if (!$form_state->isValueEmpty(array('block', 'create'))) {
+    if (!$form_state->isValueEmpty(['block', 'create'])) {
       $display_options['block'] = $this->blockDisplayOptions($form, $form_state);
     }
 
@@ -812,7 +812,7 @@ protected function addDisplays(View $view, $display_options, $form, FormStateInt
    *   Returns an array of display options.
    */
   protected function defaultDisplayOptions() {
-    $display_options = array();
+    $display_options = [];
     $display_options['access']['type'] = 'none';
     $display_options['cache']['type'] = 'tag';
     $display_options['query']['type'] = 'views_query';
@@ -823,7 +823,7 @@ protected function defaultDisplayOptions() {
 
     // Add default options array to each plugin type.
     foreach ($display_options as &$options) {
-      $options['options'] = array();
+      $options['options'] = [];
     }
 
     // Add a least one field so the view validates and the user has a preview.
@@ -849,14 +849,14 @@ protected function defaultDisplayOptions() {
     }
     // @todo Refactor the code to use ViewExecutable::addHandler. See
     //   https://www.drupal.org/node/2383157.
-    $display_options['fields'][$default_field] = array(
+    $display_options['fields'][$default_field] = [
       'table' => $default_table,
       'field' => $default_field,
       'id' => $default_field,
       'entity_type' => isset($data[$default_field]['entity type']) ? $data[$default_field]['entity type'] : NULL,
       'entity_field' => isset($data[$default_field]['entity field']) ? $data[$default_field]['entity field'] : NULL,
       'plugin_id' => $data[$default_field]['field']['id'],
-    );
+    ];
 
     return $display_options;
   }
@@ -877,7 +877,7 @@ protected function defaultDisplayOptions() {
    *   accepted by a filter handler.
    */
   protected function defaultDisplayFilters($form, FormStateInterface $form_state) {
-    $filters = array();
+    $filters = [];
 
     // Add any filters provided by the plugin.
     foreach ($this->getFilters() as $name => $info) {
@@ -903,9 +903,9 @@ protected function defaultDisplayFilters($form, FormStateInterface $form_state)
    *   accepted by a filter handler.
    */
   protected function defaultDisplayFiltersUser(array $form, FormStateInterface $form_state) {
-    $filters = array();
+    $filters = [];
 
-    if (($type = $form_state->getValue(array('show', 'type'))) && $type != 'all') {
+    if (($type = $form_state->getValue(['show', 'type'])) && $type != 'all') {
       $bundle_key = $this->entityType->getKey('bundle');
       // Figure out the table where $bundle_key lives. It may not be the same as
       // the base table for the view; the taxonomy vocabulary machine_name, for
@@ -928,14 +928,14 @@ protected function defaultDisplayFiltersUser(array $form, FormStateInterface $fo
       $handler = $table_data[$bundle_key]['filter']['id'];
       $handler_definition = Views::pluginManager('filter')->getDefinition($handler);
       if ($handler == 'in_operator' || is_subclass_of($handler_definition['class'], 'Drupal\\views\\Plugin\\views\\filter\\InOperator')) {
-        $value = array($type => $type);
+        $value = [$type => $type];
       }
       // Otherwise, use just a single value.
       else {
         $value = $type;
       }
 
-      $filters[$bundle_key] = array(
+      $filters[$bundle_key] = [
         'id' => $bundle_key,
         'table' => $table,
         'field' => $bundle_key,
@@ -943,7 +943,7 @@ protected function defaultDisplayFiltersUser(array $form, FormStateInterface $fo
         'entity_type' => isset($table_data['table']['entity type']) ? $table_data['table']['entity type'] : NULL,
         'entity_field' => isset($table_data[$bundle_key]['entity field']) ? $table_data[$bundle_key]['entity field'] : NULL,
         'plugin_id' => $handler,
-      );
+      ];
     }
 
     return $filters;
@@ -965,7 +965,7 @@ protected function defaultDisplayFiltersUser(array $form, FormStateInterface $fo
    *   accepted by a sort handler.
    */
   protected function defaultDisplaySorts($form, FormStateInterface $form_state) {
-    $sorts = array();
+    $sorts = [];
 
     // Add any sorts provided by the plugin.
     foreach ($this->getSorts() as $name => $info) {
@@ -991,11 +991,11 @@ protected function defaultDisplaySorts($form, FormStateInterface $form_state) {
    *   accepted by a sort handler.
    */
   protected function defaultDisplaySortsUser($form, FormStateInterface $form_state) {
-    $sorts = array();
+    $sorts = [];
 
     // Don't add a sort if there is no form value or the user set the sort to
     // 'none'.
-    if (($sort_type = $form_state->getValue(array('show', 'sort'))) && $sort_type != 'none') {
+    if (($sort_type = $form_state->getValue(['show', 'sort'])) && $sort_type != 'none') {
       list($column, $sort) = explode(':', $sort_type);
       // Column either be a column-name or the table-column-name.
       $column = explode('-', $column);
@@ -1014,7 +1014,7 @@ protected function defaultDisplaySortsUser($form, FormStateInterface $form_state
       // enabled.
       $data = Views::viewsData()->get($table);
       if (isset($data[$column]['sort'])) {
-        $sorts[$column] = array(
+        $sorts[$column] = [
           'id' => $column,
           'table' => $table,
           'field' => $column,
@@ -1022,7 +1022,7 @@ protected function defaultDisplaySortsUser($form, FormStateInterface $form_state
           'entity_type' => isset($data['table']['entity type']) ? $data['table']['entity type'] : NULL,
           'entity_field' => isset($data[$column]['entity field']) ? $data[$column]['entity field'] : NULL,
           'plugin_id' => $data[$column]['sort']['id'],
-       );
+       ];
       }
     }
 
@@ -1041,15 +1041,15 @@ protected function defaultDisplaySortsUser($form, FormStateInterface $form_state
    *   Returns an array of display options.
    */
   protected function pageDisplayOptions(array $form, FormStateInterface $form_state) {
-    $display_options = array();
+    $display_options = [];
     $page = $form_state->getValue('page');
     $display_options['title'] = $page['title'];
     $display_options['path'] = $page['path'];
-    $display_options['style'] = array('type' => $page['style']['style_plugin']);
+    $display_options['style'] = ['type' => $page['style']['style_plugin']];
     // Not every style plugin supports row style plugins.
     // Make sure that the selected row plugin is a valid one.
     $options = $this->rowStyleOptions();
-    $display_options['row'] = array('type' => (isset($page['style']['row_plugin']) && isset($options[$page['style']['row_plugin']])) ? $page['style']['row_plugin'] : 'fields');
+    $display_options['row'] = ['type' => (isset($page['style']['row_plugin']) && isset($options[$page['style']['row_plugin']])) ? $page['style']['row_plugin'] : 'fields'];
 
     // If the specific 0 items per page, use no pager.
     if (empty($page['items_per_page'])) {
@@ -1087,12 +1087,12 @@ protected function pageDisplayOptions(array $form, FormStateInterface $form_stat
    *   Returns an array of display options.
    */
   protected function blockDisplayOptions(array $form, FormStateInterface $form_state) {
-    $display_options = array();
+    $display_options = [];
     $block = $form_state->getValue('block');
     $display_options['title'] = $block['title'];
-    $display_options['style'] = array('type' => $block['style']['style_plugin']);
+    $display_options['style'] = ['type' => $block['style']['style_plugin']];
     $options = $this->rowStyleOptions();
-    $display_options['row'] = array('type' => (isset($block['style']['row_plugin']) && isset($options[$block['style']['row_plugin']])) ? $block['style']['row_plugin'] : 'fields');
+    $display_options['row'] = ['type' => (isset($block['style']['row_plugin']) && isset($options[$block['style']['row_plugin']])) ? $block['style']['row_plugin'] : 'fields'];
     $display_options['pager']['type'] = $block['pager'] ? 'full' : (empty($block['items_per_page']) ? 'none' : 'some');
     $display_options['pager']['options']['items_per_page'] = $block['items_per_page'];
     return $display_options;
@@ -1110,9 +1110,9 @@ protected function blockDisplayOptions(array $form, FormStateInterface $form_sta
    *   Returns an array of display options.
    */
   protected function restExportDisplayOptions(array $form, FormStateInterface $form_state) {
-    $display_options = array();
+    $display_options = [];
     $display_options['path'] = $form_state->getValue(['rest_export', 'path']);
-    $display_options['style'] = array('type' => 'serializer');
+    $display_options['style'] = ['type' => 'serializer'];
 
     return $display_options;
   }
@@ -1129,16 +1129,16 @@ protected function restExportDisplayOptions(array $form, FormStateInterface $for
    *   Returns an array of display options.
    */
   protected function pageFeedDisplayOptions($form, FormStateInterface $form_state) {
-    $display_options = array();
+    $display_options = [];
     $display_options['pager']['type'] = 'some';
-    $display_options['style'] = array('type' => 'rss');
-    $display_options['row'] = array('type' => $form_state->getValue(array('page', 'feed_properties', 'row_plugin')));
-    $display_options['path'] = $form_state->getValue(array('page', 'feed_properties', 'path'));
-    $display_options['title'] = $form_state->getValue(array('page', 'title'));
-    $display_options['displays'] = array(
+    $display_options['style'] = ['type' => 'rss'];
+    $display_options['row'] = ['type' => $form_state->getValue(['page', 'feed_properties', 'row_plugin'])];
+    $display_options['path'] = $form_state->getValue(['page', 'feed_properties', 'path']);
+    $display_options['title'] = $form_state->getValue(['page', 'title']);
+    $display_options['displays'] = [
       'default' => 'default',
       'page_1' => 'page_1',
-    );
+    ];
     return $display_options;
   }
 
diff --git a/core/modules/views/src/ResultRow.php b/core/modules/views/src/ResultRow.php
index 39febcf6d1e54b3d522dc044fbfe9c5089160ccc..da55038fc98ec46421a59ecda540f497c24fc76d 100644
--- a/core/modules/views/src/ResultRow.php
+++ b/core/modules/views/src/ResultRow.php
@@ -34,7 +34,7 @@ class ResultRow {
    * @param array $values
    *   (optional) An array of values to add as properties on the object.
    */
-  public function __construct(array $values = array()) {
+  public function __construct(array $values = []) {
     foreach ($values as $key => $value) {
       $this->{$key} = $value;
     }
diff --git a/core/modules/views/src/Routing/ViewPageController.php b/core/modules/views/src/Routing/ViewPageController.php
index dc9153c4bfabd5cb43702c3f304485edbcb9a43f..772103d3786e200cbf1213688ef69a81a49425a0 100644
--- a/core/modules/views/src/Routing/ViewPageController.php
+++ b/core/modules/views/src/Routing/ViewPageController.php
@@ -22,9 +22,9 @@ class ViewPageController {
    * @return null|void
    */
   public function handle($view_id, $display_id, RouteMatchInterface $route_match) {
-    $args = array();
+    $args = [];
     $route = $route_match->getRouteObject();
-    $map = $route->hasOption('_view_argument_map') ? $route->getOption('_view_argument_map') : array();
+    $map = $route->hasOption('_view_argument_map') ? $route->getOption('_view_argument_map') : [];
 
     foreach ($map as $attribute => $parameter_name) {
       // Allow parameters be pulled from the request.
diff --git a/core/modules/views/src/Tests/DefaultViewsTest.php b/core/modules/views/src/Tests/DefaultViewsTest.php
index 5c1f601b20a56083a56b15120c9665b9d236e87a..e5349ab4d1e1a2977d74ce95b960f3885a3af94d 100644
--- a/core/modules/views/src/Tests/DefaultViewsTest.php
+++ b/core/modules/views/src/Tests/DefaultViewsTest.php
@@ -29,18 +29,18 @@ class DefaultViewsTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('views', 'node', 'search', 'comment', 'taxonomy', 'block', 'user');
+  public static $modules = ['views', 'node', 'search', 'comment', 'taxonomy', 'block', 'user'];
 
   /**
    * An array of argument arrays to use for default views.
    *
    * @var array
    */
-  protected $viewArgMap = array(
-    'backlinks' => array(1),
-    'taxonomy_term' => array(1),
-    'glossary' => array('all'),
-  );
+  protected $viewArgMap = [
+    'backlinks' => [1],
+    'taxonomy_term' => [1],
+    'glossary' => ['all'],
+  ];
 
   protected function setUp() {
     parent::setUp();
@@ -48,7 +48,7 @@ protected function setUp() {
     $this->drupalPlaceBlock('page_title_block');
 
     // Create Basic page node type.
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     $vocabulary = Vocabulary::create([
       'name' => $this->randomMachineName(),
@@ -56,7 +56,7 @@ protected function setUp() {
       'vid' => Unicode::strtolower($this->randomMachineName()),
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
       'help' => '',
-      'nodes' => array('page' => 'page'),
+      'nodes' => ['page' => 'page'],
       'weight' => mt_rand(0, 10),
     ]);
     $vocabulary->save();
@@ -64,12 +64,12 @@ protected function setUp() {
     // Create a field.
     $field_name = Unicode::strtolower($this->randomMachineName());
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $vocabulary->id() => $vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', 'page', $field_name, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     // Create a time in the past for the archive.
@@ -81,7 +81,7 @@ protected function setUp() {
       $user = $this->drupalCreateUser();
       $term = $this->createTerm($vocabulary);
 
-      $values = array('created' => $time, 'type' => 'page');
+      $values = ['created' => $time, 'type' => 'page'];
       $values[$field_name][]['target_id'] = $term->id();
 
       // Make every other node promoted.
@@ -92,19 +92,19 @@ protected function setUp() {
 
       $node = $this->drupalCreateNode($values);
 
-      $comment = array(
+      $comment = [
         'uid' => $user->id(),
         'status' => CommentInterface::PUBLISHED,
         'entity_id' => $node->id(),
         'entity_type' => 'node',
         'field_name' => 'comment'
-      );
+      ];
       Comment::create($comment)->save();
     }
 
     // Some views, such as the "Who's Online" view, only return results if at
     // least one user is logged in.
-    $account = $this->drupalCreateUser(array());
+    $account = $this->drupalCreateUser([]);
     $this->drupalLogin($account);
   }
 
@@ -127,14 +127,14 @@ public function testDefaultViews() {
           $view->preExecute($this->viewArgMap[$name]);
         }
 
-        $this->assert(TRUE, format_string('View @view will be executed.', array('@view' => $view->storage->id())));
+        $this->assert(TRUE, format_string('View @view will be executed.', ['@view' => $view->storage->id()]));
         $view->execute();
 
-        $tokens = array('@name' => $name, '@display_id' => $display_id);
+        $tokens = ['@name' => $name, '@display_id' => $display_id];
         $this->assertTrue($view->executed, format_string('@name:@display_id has been executed.', $tokens));
 
         $count = count($view->result);
-        $this->assertTrue($count > 0, format_string('@count results returned', array('@count' => $count)));
+        $this->assertTrue($count > 0, format_string('@count results returned', ['@count' => $count]));
         $view->destroy();
       }
     }
@@ -164,49 +164,49 @@ function createTerm($vocabulary) {
   public function testArchiveView() {
     // Create additional nodes compared to the one in the setup method.
     // Create two nodes in the same month, and one in each following month.
-    $node = array(
+    $node = [
       'created' => 280299600, // Sun, 19 Nov 1978 05:00:00 GMT
-    );
+    ];
     $this->drupalCreateNode($node);
     $this->drupalCreateNode($node);
-    $node = array(
+    $node = [
       'created' => 282891600, // Tue, 19 Dec 1978 05:00:00 GMT
-    );
+    ];
     $this->drupalCreateNode($node);
-    $node = array(
+    $node = [
       'created' => 285570000, // Fri, 19 Jan 1979 05:00:00 GMT
-    );
+    ];
     $this->drupalCreateNode($node);
 
     $view = Views::getView('archive');
     $view->setDisplay('page_1');
     $this->executeView($view);
-    $columns = array('nid', 'created_year_month', 'num_records');
+    $columns = ['nid', 'created_year_month', 'num_records'];
     $column_map = array_combine($columns, $columns);
     // Create time of additional nodes created in the setup method.
     $created_year_month = date('Ym', REQUEST_TIME - 3600);
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'nid' => 1,
         'created_year_month' => $created_year_month,
         'num_records' => 11,
-      ),
-      array(
+      ],
+      [
         'nid' => 15,
         'created_year_month' => 197901,
         'num_records' => 1,
-      ),
-      array(
+      ],
+      [
         'nid' => 14,
         'created_year_month' => 197812,
         'num_records' => 1,
-      ),
-      array(
+      ],
+      [
         'nid' => 12,
         'created_year_month' => 197811,
         'num_records' => 2,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $column_map);
 
     $view->storage->setStatus(TRUE);
diff --git a/core/modules/views/src/Tests/Entity/BaseFieldAccessTest.php b/core/modules/views/src/Tests/Entity/BaseFieldAccessTest.php
index db1110d478462c769ef7cbea1130b92fb916ff57..698a43e79f810a51c59802ef744366d40f36655f 100644
--- a/core/modules/views/src/Tests/Entity/BaseFieldAccessTest.php
+++ b/core/modules/views/src/Tests/Entity/BaseFieldAccessTest.php
@@ -18,7 +18,7 @@ class BaseFieldAccessTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_entity_test_protected_access');
+  public static $testViews = ['test_entity_test_protected_access'];
 
   /**
    * Modules to enable
@@ -38,7 +38,7 @@ protected function setUp() {
     $update_manager = $this->container->get('entity.definition_update_manager');
     \Drupal::entityManager()->clearCachedDefinitions();
     $update_manager->applyUpdates();
-    ViewTestData::createTestViews(get_class($this), array('comment_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['comment_test_views']);
     \Drupal::state()->set('entity_test.views_data', [
       'entity_test' => [
         'test_text_access' => [
diff --git a/core/modules/views/src/Tests/Entity/FieldEntityTest.php b/core/modules/views/src/Tests/Entity/FieldEntityTest.php
index 215b631ba9f5e1dbc7e2b95a0f793b27cd1d8409..89f71edf0c3c3f8c95ab281b3257313da5685626 100644
--- a/core/modules/views/src/Tests/Entity/FieldEntityTest.php
+++ b/core/modules/views/src/Tests/Entity/FieldEntityTest.php
@@ -24,14 +24,14 @@ class FieldEntityTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_field_get_entity');
+  public static $testViews = ['test_field_get_entity'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'comment');
+  public static $modules = ['node', 'comment'];
 
   /**
    * {@inheritdoc}
@@ -39,10 +39,10 @@ class FieldEntityTest extends ViewTestBase {
   protected function setUp($import_test_views = TRUE) {
     parent::setUp(FALSE);
 
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     $this->addDefaultCommentField('node', 'page');
 
-    ViewTestData::createTestViews(get_class($this), array('views_test_config'));
+    ViewTestData::createTestViews(get_class($this), ['views_test_config']);
   }
 
   /**
@@ -61,12 +61,12 @@ public function testGetEntity() {
       'title' => $this->randomString(),
     ]);
     $node->save();
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'uid' => $account->id(),
       'entity_id' => $node->id(),
       'entity_type' => 'node',
       'field_name' => 'comment'
-    ));
+    ]);
     $comment->save();
 
     $user = $this->drupalCreateUser(['access comments']);
diff --git a/core/modules/views/src/Tests/Entity/FilterEntityBundleTest.php b/core/modules/views/src/Tests/Entity/FilterEntityBundleTest.php
index 589c4dc02f56c2064ed0c3c692fb53228dbc7f3f..f099569b80b410f0fe7c0f45c07133eb5ff1d6e6 100644
--- a/core/modules/views/src/Tests/Entity/FilterEntityBundleTest.php
+++ b/core/modules/views/src/Tests/Entity/FilterEntityBundleTest.php
@@ -19,14 +19,14 @@ class FilterEntityBundleTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_entity_type_filter');
+  public static $testViews = ['test_entity_type_filter'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Entity bundle data.
@@ -40,15 +40,15 @@ class FilterEntityBundleTest extends ViewTestBase {
    *
    * @var array
    */
-  protected $entities = array();
+  protected $entities = [];
 
   protected function setUp() {
     parent::setUp(FALSE);
 
-    $this->drupalCreateContentType(array('type' => 'test_bundle'));
-    $this->drupalCreateContentType(array('type' => 'test_bundle_2'));
+    $this->drupalCreateContentType(['type' => 'test_bundle']);
+    $this->drupalCreateContentType(['type' => 'test_bundle_2']);
 
-    ViewTestData::createTestViews(get_class($this), array('views_test_config'));
+    ViewTestData::createTestViews(get_class($this), ['views_test_config']);
 
     $this->entityBundles = $this->container->get('entity_type.bundle.info')->getBundleInfo('node');
 
@@ -92,7 +92,7 @@ public function testFilterEntity() {
     $this->assertEqual(count($view->result), $this->entities['count']);
 
     // Test the valueOptions of the filter handler.
-    $expected = array();
+    $expected = [];
 
     foreach ($this->entityBundles as $key => $info) {
       $expected[$key] = $info['label'];
@@ -106,7 +106,7 @@ public function testFilterEntity() {
       // Test each bundle type.
       $view->initDisplay();
       $filters = $view->display_handler->getOption('filters');
-      $filters['type']['value'] = array($key => $key);
+      $filters['type']['value'] = [$key => $key];
       $view->display_handler->setOption('filters', $filters);
       $this->executeView($view);
 
@@ -118,7 +118,7 @@ public function testFilterEntity() {
     // Test an invalid bundle type to make sure we have no results.
     $view->initDisplay();
     $filters = $view->display_handler->getOption('filters');
-    $filters['type']['value'] = array('type_3' => 'type_3');
+    $filters['type']['value'] = ['type_3' => 'type_3'];
     $view->display_handler->setOption('filters', $filters);
     $this->executeView($view);
 
diff --git a/core/modules/views/src/Tests/Entity/ViewNonTranslatableEntityTest.php b/core/modules/views/src/Tests/Entity/ViewNonTranslatableEntityTest.php
index df6f7d4da5fd30720a7958b7b37311d4cb8fa736..82c683995cfa922dabfde1713025f6ed6e79cc94 100644
--- a/core/modules/views/src/Tests/Entity/ViewNonTranslatableEntityTest.php
+++ b/core/modules/views/src/Tests/Entity/ViewNonTranslatableEntityTest.php
@@ -18,12 +18,12 @@ class ViewNonTranslatableEntityTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'entity_test',
     'content_translation',
     'language_test',
     'views_ui',
-  );
+  ];
 
   /**
    * Tests displaying a view of non-translatable entities.
diff --git a/core/modules/views/src/Tests/FieldApiDataTest.php b/core/modules/views/src/Tests/FieldApiDataTest.php
index 3fd8a03fa35a97b5ce943aa6fb6ab2fc982b435a..24b2cf30e0b2b86d398868df87f9c5519ea94168 100644
--- a/core/modules/views/src/Tests/FieldApiDataTest.php
+++ b/core/modules/views/src/Tests/FieldApiDataTest.php
@@ -19,12 +19,12 @@ protected function setUp() {
     $field_names = $this->setUpFieldStorages(1);
 
     // Attach the field to nodes only.
-    $field = array(
+    $field = [
       'field_name' => $field_names[0],
       'entity_type' => 'node',
       'bundle' => 'page',
       'label' => 'GiraffeA" label'
-    );
+    ];
     FieldConfig::create($field)->save();
 
     // Attach the same field to a different bundle with a different label.
@@ -38,9 +38,9 @@ protected function setUp() {
 
     // Now create some example nodes/users for the view result.
     for ($i = 0; $i < 5; $i++) {
-      $edit = array(
-        $field_names[0] => array((array('value' => $this->randomMachineName()))),
-      );
+      $edit = [
+        $field_names[0] => [(['value' => $this->randomMachineName()])],
+      ];
       $nodes[] = $this->drupalCreateNode($edit);
     }
   }
@@ -63,25 +63,25 @@ function testViewsData() {
     $this->assertTrue(isset($data[$current_table]['table']['join']['node_field_data']));
     $this->assertTrue(isset($data[$revision_table]['table']['join']['node_field_revision']));
 
-    $expected_join = array(
+    $expected_join = [
       'table' => $current_table,
       'left_field' => 'nid',
       'field' => 'entity_id',
-      'extra' => array(
-        array('field' => 'deleted', 'value' => 0, 'numeric' => TRUE),
-        array('left_field' => 'langcode', 'field' => 'langcode'),
-      ),
-    );
+      'extra' => [
+        ['field' => 'deleted', 'value' => 0, 'numeric' => TRUE],
+        ['left_field' => 'langcode', 'field' => 'langcode'],
+      ],
+    ];
     $this->assertEqual($expected_join, $data[$current_table]['table']['join']['node_field_data']);
-    $expected_join = array(
+    $expected_join = [
       'table' => $revision_table,
       'left_field' => 'vid',
       'field' => 'revision_id',
-      'extra' => array(
-        array('field' => 'deleted', 'value' => 0, 'numeric' => TRUE),
-        array('left_field' => 'langcode', 'field' => 'langcode'),
-      ),
-    );
+      'extra' => [
+        ['field' => 'deleted', 'value' => 0, 'numeric' => TRUE],
+        ['left_field' => 'langcode', 'field' => 'langcode'],
+      ],
+    ];
     $this->assertEqual($expected_join, $data[$revision_table]['table']['join']['node_field_revision']);
 
     // Test click sortable.
@@ -124,7 +124,7 @@ function testViewsData() {
    */
   protected function getViewsData() {
     $views_data = $this->container->get('views.views_data');
-    $data = array();
+    $data = [];
 
     // Check the table and the joins of the first field.
     // Attached to node only.
diff --git a/core/modules/views/src/Tests/GlossaryTest.php b/core/modules/views/src/Tests/GlossaryTest.php
index 2a5bc907c6ecbd8bba917730a52a8bae035b5769..b1657687dfddc1c724be7c78895ddb17a86b57d0 100644
--- a/core/modules/views/src/Tests/GlossaryTest.php
+++ b/core/modules/views/src/Tests/GlossaryTest.php
@@ -21,7 +21,7 @@ class GlossaryTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Tests the default glossary view.
@@ -29,19 +29,19 @@ class GlossaryTest extends ViewTestBase {
   public function testGlossaryView() {
     // Create a content type and add some nodes, with a non-random title.
     $type = $this->drupalCreateContentType();
-    $nodes_per_char = array(
+    $nodes_per_char = [
       'd' => 1,
       'r' => 4,
       'u' => 10,
       'p' => 2,
       'a' => 3,
       'l' => 6,
-    );
+    ];
     $nodes_by_char = [];
     foreach ($nodes_per_char as $char => $count) {
-      $setting = array(
+      $setting = [
         'type' => $type->id()
-      );
+      ];
       for ($i = 0; $i < $count; $i++) {
         $node = $setting;
         $node['title'] = $char . $this->randomString(3);
@@ -111,10 +111,10 @@ public function testGlossaryView() {
       $label = Unicode::strtoupper($char);
       // Get the summary link for a certain character. Filter by label and href
       // to ensure that both of them are correct.
-      $result = $this->xpath('//a[contains(@href, :href) and normalize-space(text())=:label]/..', array(':href' => $href, ':label' => $label));
+      $result = $this->xpath('//a[contains(@href, :href) and normalize-space(text())=:label]/..', [':href' => $href, ':label' => $label]);
       $this->assertTrue(count($result));
       // The rendered output looks like "| (count)" so let's figure out the int.
-      $result_count = trim(str_replace(array('|', '(', ')'), '', (string) $result[0]));
+      $result_count = trim(str_replace(['|', '(', ')'], '', (string) $result[0]));
       $this->assertEqual($result_count, $count, 'The expected number got rendered.');
     }
   }
diff --git a/core/modules/views/src/Tests/Handler/AreaHTTPStatusCodeTest.php b/core/modules/views/src/Tests/Handler/AreaHTTPStatusCodeTest.php
index 86d1f992a9363bf8e49e50cad2f41968a780c64b..2656adc4dcdb6898e1ea25797ab504b09016bc41 100644
--- a/core/modules/views/src/Tests/Handler/AreaHTTPStatusCodeTest.php
+++ b/core/modules/views/src/Tests/Handler/AreaHTTPStatusCodeTest.php
@@ -17,14 +17,14 @@ class AreaHTTPStatusCodeTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_http_status_code');
+  public static $testViews = ['test_http_status_code'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Tests the area handler.
diff --git a/core/modules/views/src/Tests/Handler/AreaTest.php b/core/modules/views/src/Tests/Handler/AreaTest.php
index 454ab58d0eb9b84b727306fee68b6df18e6a0b68..ca9fc422dcbefe3e876bcd550f7f97e4c96a12a8 100644
--- a/core/modules/views/src/Tests/Handler/AreaTest.php
+++ b/core/modules/views/src/Tests/Handler/AreaTest.php
@@ -19,14 +19,14 @@ class AreaTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_example_area', 'test_example_area_access');
+  public static $testViews = ['test_example_area', 'test_example_area_access'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'views_ui');
+  public static $modules = ['node', 'views_ui'];
 
   protected function setUp() {
     parent::setUp();
@@ -36,13 +36,13 @@ protected function setUp() {
 
   protected function viewsData() {
     $data = parent::viewsData();
-    $data['views']['test_example'] = array(
+    $data['views']['test_example'] = [
       'title' => 'Test Example area',
       'help' => 'A area handler which just exists for tests.',
-      'area' => array(
+      'area' => [
         'id' => 'test_example'
-      )
-    );
+      ]
+    ];
 
     return $data;
   }
@@ -52,21 +52,21 @@ protected function viewsData() {
    * Tests the generic UI of a area handler.
    */
   public function testUI() {
-    $admin_user = $this->drupalCreateUser(array('administer views', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer views', 'administer site configuration']);
     $this->drupalLogin($admin_user);
 
-    $types = array('header', 'footer', 'empty');
-    $labels = array();
+    $types = ['header', 'footer', 'empty'];
+    $labels = [];
     foreach ($types as $type) {
       $edit_path = 'admin/structure/views/nojs/handler/test_example_area/default/' . $type . '/test_example';
 
       // First setup an empty label.
-      $this->drupalPostForm($edit_path, array(), t('Apply'));
+      $this->drupalPostForm($edit_path, [], t('Apply'));
       $this->assertText('Test Example area');
 
       // Then setup a no empty label.
       $labels[$type] = $this->randomMachineName();
-      $this->drupalPostForm($edit_path, array('options[admin_label]' => $labels[$type]), t('Apply'));
+      $this->drupalPostForm($edit_path, ['options[admin_label]' => $labels[$type]], t('Apply'));
       // Make sure that the new label appears on the site.
       $this->assertText($labels[$type]);
 
@@ -188,7 +188,7 @@ public function testAreaAccess() {
    * Tests global tokens.
    */
   public function testRenderAreaToken() {
-    $admin_user = $this->drupalCreateUser(array('administer views', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer views', 'administer site configuration']);
     $this->drupalLogin($admin_user);
 
     $view = Views::getView('test_example_area');
@@ -204,7 +204,7 @@ public function testRenderAreaToken() {
 
     // Test the list of available tokens.
     $available = $empty_handler->getAvailableGlobalTokens();
-    foreach (array('site', 'view') as $type) {
+    foreach (['site', 'view'] as $type) {
       $this->assertTrue(!empty($available[$type]) && is_array($available[$type]));
       // Test that each item exists in the list.
       foreach ($available[$type] as $token => $info) {
@@ -230,8 +230,8 @@ public function testTitleArea() {
     $view->initDisplay('page_1');
 
     // Add the title area handler to the empty area.
-    $view->displayHandlers->get('page_1')->overrideOption('empty', array(
-      'title' => array(
+    $view->displayHandlers->get('page_1')->overrideOption('empty', [
+      'title' => [
         'id' => 'title',
         'table' => 'views',
         'field' => 'title',
@@ -239,8 +239,8 @@ public function testTitleArea() {
         'empty' => '0',
         'title' => 'Overridden title',
         'plugin_id' => 'title',
-      ),
-    ));
+      ],
+    ]);
 
     $view->storage->enable()->save();
 
diff --git a/core/modules/views/src/Tests/Handler/ArgumentStringTest.php b/core/modules/views/src/Tests/Handler/ArgumentStringTest.php
index e47b1a362fce02051f421e422890c23d83e834b9..9d83fad572fb617be4b9710057b9efa9ec2111ca 100644
--- a/core/modules/views/src/Tests/Handler/ArgumentStringTest.php
+++ b/core/modules/views/src/Tests/Handler/ArgumentStringTest.php
@@ -16,14 +16,14 @@ class ArgumentStringTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_glossary');
+  public static $testViews = ['test_glossary'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Tests the glossary feature.
@@ -31,11 +31,11 @@ class ArgumentStringTest extends HandlerTestBase {
   function testGlossary() {
     // Setup some nodes, one with a, two with b and three with c.
     $counter = 1;
-    foreach (array('a', 'b', 'c') as $char) {
+    foreach (['a', 'b', 'c'] as $char) {
       for ($i = 0; $i < $counter; $i++) {
-        $edit = array(
+        $edit = [
           'title' => $char . $this->randomMachineName(),
-        );
+        ];
         $this->drupalCreateNode($edit);
       }
     }
diff --git a/core/modules/views/src/Tests/Handler/FieldDropButtonTest.php b/core/modules/views/src/Tests/Handler/FieldDropButtonTest.php
index f2082f0a2f75d602498b7383a10c94570c442ed6..9d5c67fa752e15181688228755b94c98c4413755 100644
--- a/core/modules/views/src/Tests/Handler/FieldDropButtonTest.php
+++ b/core/modules/views/src/Tests/Handler/FieldDropButtonTest.php
@@ -15,14 +15,14 @@ class FieldDropButtonTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_dropbutton');
+  public static $testViews = ['test_dropbutton'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * {@inheritdoc}
@@ -39,16 +39,16 @@ protected function setUp() {
    */
   public function testDropbutton() {
     // Create some test nodes.
-    $nodes = array();
+    $nodes = [];
     for ($i = 0; $i < 5; $i++) {
       $nodes[] = $this->drupalCreateNode();
     }
 
     $this->drupalGet('test-dropbutton');
     foreach ($nodes as $node) {
-      $result = $this->xpath('//ul[contains(@class, dropbutton)]/li/a[contains(@href, :path) and text()=:title]', array(':path' => '/node/' . $node->id(), ':title' => $node->label()));
+      $result = $this->xpath('//ul[contains(@class, dropbutton)]/li/a[contains(@href, :path) and text()=:title]', [':path' => '/node/' . $node->id(), ':title' => $node->label()]);
       $this->assertEqual(count($result), 1, 'Just one node title link was found.');
-      $result = $this->xpath('//ul[contains(@class, dropbutton)]/li/a[contains(@href, :path) and text()=:title]', array(':path' => '/node/' . $node->id(), ':title' => t('Custom Text')));
+      $result = $this->xpath('//ul[contains(@class, dropbutton)]/li/a[contains(@href, :path) and text()=:title]', [':path' => '/node/' . $node->id(), ':title' => t('Custom Text')]);
       $this->assertEqual(count($result), 1, 'Just one custom link was found.');
     }
 
diff --git a/core/modules/views/src/Tests/Handler/FieldEntityOperationsTest.php b/core/modules/views/src/Tests/Handler/FieldEntityOperationsTest.php
index e76d54e34b2fd6b483773885c7a9040de26d357d..57544b5c66f460034b1e72098c9deab6e2a1c3a8 100644
--- a/core/modules/views/src/Tests/Handler/FieldEntityOperationsTest.php
+++ b/core/modules/views/src/Tests/Handler/FieldEntityOperationsTest.php
@@ -18,14 +18,14 @@ class FieldEntityOperationsTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_entity_operations');
+  public static $testViews = ['test_entity_operations'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'language', 'views_ui');
+  public static $modules = ['node', 'language', 'views_ui'];
 
   function setUp() {
     parent::setUp();
@@ -46,7 +46,7 @@ public function testEntityOperations() {
 
     // Create some test entities. Every other entity is Hungarian while all
     // have a Spanish translation.
-    $entities = array();
+    $entities = [];
     for ($i = 0; $i < 5; $i++) {
       $entity = Node::create([
         'title' => $this->randomString(),
@@ -60,7 +60,7 @@ public function testEntityOperations() {
       $entities[$i] = $entity;
     }
 
-    $admin_user = $this->drupalCreateUser(array('access administration pages', 'administer nodes', 'bypass node access'));
+    $admin_user = $this->drupalCreateUser(['access administration pages', 'administer nodes', 'bypass node access']);
     $this->drupalLogin($this->rootUser);
     $this->drupalGet('test-entity-operations');
     /** @var $entity \Drupal\entity_test\Entity\EntityTest */
@@ -72,8 +72,8 @@ public function testEntityOperations() {
         $this->assertTrue(count($operations) > 0, 'There are operations.');
         foreach ($operations as $operation) {
           $expected_destination = Url::fromUri('internal:/test-entity-operations')->toString();
-          $result = $this->xpath('//ul[contains(@class, dropbutton)]/li/a[@href=:path and text()=:title]', array(':path' => $operation['url']->toString() . '?destination=' . $expected_destination, ':title' => $operation['title']));
-          $this->assertEqual(count($result), 1, t('Found entity @operation link with destination parameter.', array('@operation' => $operation['title'])));
+          $result = $this->xpath('//ul[contains(@class, dropbutton)]/li/a[@href=:path and text()=:title]', [':path' => $operation['url']->toString() . '?destination=' . $expected_destination, ':title' => $operation['title']]);
+          $this->assertEqual(count($result), 1, t('Found entity @operation link with destination parameter.', ['@operation' => $operation['title']]));
           // Entities which were created in Hungarian should link to the Hungarian
           // edit form, others to the English one (which has no path prefix here).
           $base_path = \Drupal::request()->getBasePath();
diff --git a/core/modules/views/src/Tests/Handler/FieldGroupRowsTest.php b/core/modules/views/src/Tests/Handler/FieldGroupRowsTest.php
index 87203613ac6864fc1e094154ce4c441624025247..2521e6329e7ed76fbda2c23b037282403fc3db22 100644
--- a/core/modules/views/src/Tests/Handler/FieldGroupRowsTest.php
+++ b/core/modules/views/src/Tests/Handler/FieldGroupRowsTest.php
@@ -22,14 +22,14 @@ class FieldGroupRowsTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_group_rows', 'test_ungroup_rows');
+  public static $testViews = ['test_group_rows', 'test_ungroup_rows'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'field_test');
+  public static $modules = ['node', 'field_test'];
 
   /**
    * Field that will be created to test the group/ungroup rows functionality
@@ -42,22 +42,22 @@ protected function setUp() {
     parent::setUp();
 
     // Create content type with unlimited text field.
-    $node_type = $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
+    $node_type = $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
 
     // Create the unlimited text field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
         'field_name' => $this->fieldName,
         'entity_type' => 'node',
         'type' => 'text',
         'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
-      ));
+      ]);
     $field_storage->save();
 
     // Create an instance of the text field on the content type.
-    $field = array(
+    $field = [
       'field_storage' => $field_storage,
       'bundle' => $node_type->id(),
-    );
+    ];
     FieldConfig::create($field)->save();
   }
 
@@ -68,10 +68,10 @@ public function testGroupRows() {
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
     $renderer = \Drupal::service('renderer');
 
-    $edit = array(
+    $edit = [
       'title' => $this->randomMachineName(),
-      $this->fieldName => array('a', 'b', 'c'),
-    );
+      $this->fieldName => ['a', 'b', 'c'],
+    ];
     $this->drupalCreateNode($edit);
 
     $view = Views::getView('test_group_rows');
diff --git a/core/modules/views/src/Tests/Handler/FieldWebTest.php b/core/modules/views/src/Tests/Handler/FieldWebTest.php
index e85206985a9bafe17740e7534dfd186ecb259004..31de7be7e627a8571d1551a58d6d7f083c44ee02 100644
--- a/core/modules/views/src/Tests/Handler/FieldWebTest.php
+++ b/core/modules/views/src/Tests/Handler/FieldWebTest.php
@@ -25,7 +25,7 @@ class FieldWebTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'test_field_classes', 'test_field_output', 'test_click_sort');
+  public static $testViews = ['test_view', 'test_field_classes', 'test_field_output', 'test_click_sort'];
 
   /**
    * {@inheritdoc}
@@ -37,9 +37,9 @@ class FieldWebTest extends HandlerTestBase {
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_name' => 'name',
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
@@ -97,7 +97,7 @@ public function testClickSorting() {
    */
   protected function clickSortLoadIdsFromOutput() {
     $fields = $this->xpath("//td[contains(@class, 'views-field-id')]");
-    $ids = array();
+    $ids = [];
     foreach ($fields as $field) {
       $ids[] = (int) $field[0];
     }
@@ -174,14 +174,14 @@ protected function parseContent($content) {
    *   format and return values see the SimpleXML documentation,
    *   http://php.net/manual/function.simplexml-element-xpath.php.
    */
-  protected function xpathContent($content, $xpath, array $arguments = array()) {
+  protected function xpathContent($content, $xpath, array $arguments = []) {
     if ($elements = $this->parseContent($content)) {
       $xpath = $this->buildXPathQuery($xpath, $arguments);
       $result = $elements->xpath($xpath);
       // Some combinations of PHP / libxml versions return an empty array
       // instead of the documented FALSE. Forcefully convert any falsish values
       // to an empty array to allow foreach(...) constructions.
-      return $result ? $result : array();
+      return $result ? $result : [];
     }
     else {
       return FALSE;
@@ -224,7 +224,7 @@ public function testAlterUrl() {
 
     // Some generic test code adapted from the UrlTest class, which tests
     // mostly the different options for the path.
-    foreach (array(FALSE, TRUE) as $absolute) {
+    foreach ([FALSE, TRUE] as $absolute) {
       $alter = &$id_field->options['alter'];
       $alter['path'] = 'node/123';
 
@@ -258,7 +258,7 @@ public function testAlterUrl() {
 
       // @todo The route-based URL generator strips out NULL attributes.
       // $expected_result = \Drupal::url('entity.node.canonical', ['node' => '123'], ['query' => ['foo' => NULL], 'fragment' => 'bar', 'absolute' => $absolute]);
-      $expected_result = Url::fromUserInput('/node/123', array('query' => array('foo' => NULL), 'fragment' => 'bar', 'absolute' => $absolute))->toString();
+      $expected_result = Url::fromUserInput('/node/123', ['query' => ['foo' => NULL], 'fragment' => 'bar', 'absolute' => $absolute])->toString();
       $alter['path'] = 'node/123?foo#bar';
       $result = $renderer->executeInRenderContext(new RenderContext(), function () use ($id_field, $row) {
         return $id_field->theme($row);
@@ -345,7 +345,7 @@ public function testAlterUrl() {
     $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($id_field, $row) {
       return $id_field->theme($row);
     });
-    $elements = $this->xpathContent($output, '//a[contains(@class, :class)]', array(':class' => $class));
+    $elements = $this->xpathContent($output, '//a[contains(@class, :class)]', [':class' => $class]);
     $this->assertTrue($elements);
     // @fixme link_class, alt, rel cannot be unset, which should be fixed.
     $id_field->options['alter']['link_class'] = '';
@@ -355,7 +355,7 @@ public function testAlterUrl() {
     $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($id_field, $row) {
       return $id_field->theme($row);
     });
-    $elements = $this->xpathContent($output, '//a[contains(@title, :alt)]', array(':alt' => $rel));
+    $elements = $this->xpathContent($output, '//a[contains(@title, :alt)]', [':alt' => $rel]);
     $this->assertTrue($elements);
     $id_field->options['alter']['alt'] = '';
 
@@ -364,7 +364,7 @@ public function testAlterUrl() {
     $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($id_field, $row) {
       return $id_field->theme($row);
     });
-    $elements = $this->xpathContent($output, '//a[contains(@rel, :rel)]', array(':rel' => $rel));
+    $elements = $this->xpathContent($output, '//a[contains(@rel, :rel)]', [':rel' => $rel]);
     $this->assertTrue($elements);
     $id_field->options['alter']['rel'] = '';
 
@@ -373,7 +373,7 @@ public function testAlterUrl() {
     $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($id_field, $row) {
       return $id_field->theme($row);
     });
-    $elements = $this->xpathContent($output, '//a[contains(@target, :target)]', array(':target' => $target));
+    $elements = $this->xpathContent($output, '//a[contains(@target, :target)]', [':target' => $target]);
     $this->assertTrue($elements);
     unset($id_field->options['alter']['target']);
   }
@@ -395,81 +395,81 @@ public function testFieldClasses() {
     $id_field->options['label'] = $this->randomMachineName();
     $output = $view->preview();
     $output = $renderer->renderRoot($output);
-    $this->assertFalse($this->xpathContent($output, '//div[contains(@class, :class)]', array(':class' => 'field-content')));
-    $this->assertFalse($this->xpathContent($output, '//div[contains(@class, :class)]', array(':class' => 'field__label')));
+    $this->assertFalse($this->xpathContent($output, '//div[contains(@class, :class)]', [':class' => 'field-content']));
+    $this->assertFalse($this->xpathContent($output, '//div[contains(@class, :class)]', [':class' => 'field__label']));
 
     $id_field->options['element_default_classes'] = TRUE;
     $output = $view->preview();
     $output = $renderer->renderRoot($output);
     // Per default the label and the element of the field are spans.
-    $this->assertTrue($this->xpathContent($output, '//span[contains(@class, :class)]', array(':class' => 'field-content')));
-    $this->assertTrue($this->xpathContent($output, '//span[contains(@class, :class)]', array(':class' => 'views-label')));
-    $this->assertTrue($this->xpathContent($output, '//div[contains(@class, :class)]', array(':class' => 'views-field')));
+    $this->assertTrue($this->xpathContent($output, '//span[contains(@class, :class)]', [':class' => 'field-content']));
+    $this->assertTrue($this->xpathContent($output, '//span[contains(@class, :class)]', [':class' => 'views-label']));
+    $this->assertTrue($this->xpathContent($output, '//div[contains(@class, :class)]', [':class' => 'views-field']));
 
     // Tests the element wrapper classes/element.
     $random_class = $this->randomMachineName();
 
     // Set some common wrapper element types and see whether they appear with and without a custom class set.
-    foreach (array('h1', 'span', 'p', 'div') as $element_type) {
+    foreach (['h1', 'span', 'p', 'div'] as $element_type) {
       $id_field->options['element_wrapper_type'] = $element_type;
 
       // Set a custom wrapper element css class.
       $id_field->options['element_wrapper_class'] = $random_class;
       $output = $view->preview();
       $output = $renderer->renderRoot($output);
-      $this->assertTrue($this->xpathContent($output, "//{$element_type}[contains(@class, :class)]", array(':class' => $random_class)));
+      $this->assertTrue($this->xpathContent($output, "//{$element_type}[contains(@class, :class)]", [':class' => $random_class]));
 
       // Set no custom css class.
       $id_field->options['element_wrapper_class'] = '';
       $output = $view->preview();
       $output = $renderer->renderRoot($output);
-      $this->assertFalse($this->xpathContent($output, "//{$element_type}[contains(@class, :class)]", array(':class' => $random_class)));
+      $this->assertFalse($this->xpathContent($output, "//{$element_type}[contains(@class, :class)]", [':class' => $random_class]));
       $this->assertTrue($this->xpathContent($output, "//li[contains(@class, views-row)]/{$element_type}"));
     }
 
     // Tests the label class/element.
 
     // Set some common label element types and see whether they appear with and without a custom class set.
-    foreach (array('h1', 'span', 'p', 'div') as $element_type) {
+    foreach (['h1', 'span', 'p', 'div'] as $element_type) {
       $id_field->options['element_label_type'] = $element_type;
 
       // Set a custom label element css class.
       $id_field->options['element_label_class'] = $random_class;
       $output = $view->preview();
       $output = $renderer->renderRoot($output);
-      $this->assertTrue($this->xpathContent($output, "//li[contains(@class, views-row)]//{$element_type}[contains(@class, :class)]", array(':class' => $random_class)));
+      $this->assertTrue($this->xpathContent($output, "//li[contains(@class, views-row)]//{$element_type}[contains(@class, :class)]", [':class' => $random_class]));
 
       // Set no custom css class.
       $id_field->options['element_label_class'] = '';
       $output = $view->preview();
       $output = $renderer->renderRoot($output);
-      $this->assertFalse($this->xpathContent($output, "//li[contains(@class, views-row)]//{$element_type}[contains(@class, :class)]", array(':class' => $random_class)));
+      $this->assertFalse($this->xpathContent($output, "//li[contains(@class, views-row)]//{$element_type}[contains(@class, :class)]", [':class' => $random_class]));
       $this->assertTrue($this->xpathContent($output, "//li[contains(@class, views-row)]//{$element_type}"));
     }
 
     // Tests the element classes/element.
 
     // Set some common element element types and see whether they appear with and without a custom class set.
-    foreach (array('h1', 'span', 'p', 'div') as $element_type) {
+    foreach (['h1', 'span', 'p', 'div'] as $element_type) {
       $id_field->options['element_type'] = $element_type;
 
       // Set a custom label element css class.
       $id_field->options['element_class'] = $random_class;
       $output = $view->preview();
       $output = $renderer->renderRoot($output);
-      $this->assertTrue($this->xpathContent($output, "//li[contains(@class, views-row)]//div[contains(@class, views-field)]//{$element_type}[contains(@class, :class)]", array(':class' => $random_class)));
+      $this->assertTrue($this->xpathContent($output, "//li[contains(@class, views-row)]//div[contains(@class, views-field)]//{$element_type}[contains(@class, :class)]", [':class' => $random_class]));
 
       // Set no custom css class.
       $id_field->options['element_class'] = '';
       $output = $view->preview();
       $output = $renderer->renderRoot($output);
-      $this->assertFalse($this->xpathContent($output, "//li[contains(@class, views-row)]//div[contains(@class, views-field)]//{$element_type}[contains(@class, :class)]", array(':class' => $random_class)));
+      $this->assertFalse($this->xpathContent($output, "//li[contains(@class, views-row)]//div[contains(@class, views-field)]//{$element_type}[contains(@class, :class)]", [':class' => $random_class]));
       $this->assertTrue($this->xpathContent($output, "//li[contains(@class, views-row)]//div[contains(@class, views-field)]//{$element_type}"));
     }
 
     // Tests the available html elements.
     $element_types = $id_field->getElements();
-    $expected_elements = array(
+    $expected_elements = [
       '',
       0,
       'div',
@@ -484,7 +484,7 @@ public function testFieldClasses() {
       'strong',
       'em',
       'marquee'
-    );
+    ];
 
     $this->assertEqual(array_keys($element_types), $expected_elements);
   }
@@ -560,14 +560,14 @@ public function testTextRendering() {
     $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($name_field, $row) {
       return $name_field->advancedRender($row);
     });
-    $this->assertSubString($output, $trimmed_name, format_string('Make sure the trimmed output (@trimmed) appears in the rendered output (@output).', array('@trimmed' => $trimmed_name, '@output' => $output)));
-    $this->assertNotSubString($output, $row->views_test_data_name, format_string("Make sure the untrimmed value (@untrimmed) shouldn't appear in the rendered output (@output).", array('@untrimmed' => $row->views_test_data_name, '@output' => $output)));
+    $this->assertSubString($output, $trimmed_name, format_string('Make sure the trimmed output (@trimmed) appears in the rendered output (@output).', ['@trimmed' => $trimmed_name, '@output' => $output]));
+    $this->assertNotSubString($output, $row->views_test_data_name, format_string("Make sure the untrimmed value (@untrimmed) shouldn't appear in the rendered output (@output).", ['@untrimmed' => $row->views_test_data_name, '@output' => $output]));
 
     $name_field->options['alter']['max_length'] = 9;
     $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($name_field, $row) {
       return $name_field->advancedRender($row);
     });
-    $this->assertSubString($output, $trimmed_name, format_string('Make sure the untrimmed (@untrimmed) output appears in the rendered output  (@output).', array('@trimmed' => $trimmed_name, '@output' => $output)));
+    $this->assertSubString($output, $trimmed_name, format_string('Make sure the untrimmed (@untrimmed) output appears in the rendered output  (@output).', ['@trimmed' => $trimmed_name, '@output' => $output]));
 
     // Take word_boundary into account for the tests.
     $name_field->options['alter']['max_length'] = 5;
@@ -575,34 +575,34 @@ public function testTextRendering() {
     $random_text_2 = $this->randomMachineName(2);
     $random_text_4 = $this->randomMachineName(4);
     $random_text_8 = $this->randomMachineName(8);
-    $tuples = array(
+    $tuples = [
       // Create one string which doesn't fit at all into the limit.
-      array(
+      [
         'value' => $random_text_8,
         'trimmed_value' => '',
         'trimmed' => TRUE
-      ),
+      ],
       // Create one string with two words which doesn't fit both into the limit.
-      array(
+      [
         'value' => $random_text_8 . ' ' . $random_text_8,
         'trimmed_value' => '',
         'trimmed' => TRUE
-      ),
+      ],
       // Create one string which contains of two words, of which only the first
       // fits into the limit.
-      array(
+      [
         'value' => $random_text_4 . ' ' . $random_text_8,
         'trimmed_value' => $random_text_4,
         'trimmed' => TRUE
-      ),
+      ],
       // Create one string which contains of two words, of which both fits into
       // the limit.
-      array(
+      [
         'value' => $random_text_2 . ' ' . $random_text_2,
         'trimmed_value' => $random_text_2 . ' ' . $random_text_2,
         'trimmed' => FALSE
-      )
-    );
+      ]
+    ];
 
     foreach ($tuples as $tuple) {
       $row->views_test_data_name = $tuple['value'];
@@ -611,10 +611,10 @@ public function testTextRendering() {
       });
 
       if ($tuple['trimmed']) {
-        $this->assertNotSubString($output, $tuple['value'], format_string('The untrimmed value (@untrimmed) should not appear in the trimmed output (@output).', array('@untrimmed' => $tuple['value'], '@output' => $output)));
+        $this->assertNotSubString($output, $tuple['value'], format_string('The untrimmed value (@untrimmed) should not appear in the trimmed output (@output).', ['@untrimmed' => $tuple['value'], '@output' => $output]));
       }
       if (!empty($tuple['trimmed_value'])) {
-        $this->assertSubString($output, $tuple['trimmed_value'], format_string('The trimmed value (@trimmed) should appear in the trimmed output (@output).', array('@trimmed' => $tuple['trimmed_value'], '@output' => $output)));
+        $this->assertSubString($output, $tuple['trimmed_value'], format_string('The trimmed value (@trimmed) should appear in the trimmed output (@output).', ['@trimmed' => $tuple['trimmed_value'], '@output' => $output]));
       }
     }
 
@@ -629,14 +629,14 @@ public function testTextRendering() {
       return $name_field->advancedRender($row);
     });
     $this->assertSubString($output, $more_text, 'Make sure a read more text is displayed if the output got trimmed');
-    $this->assertTrue($this->xpathContent($output, '//a[contains(@href, :path)]', array(':path' => $more_path)), 'Make sure the read more link points to the right destination.');
+    $this->assertTrue($this->xpathContent($output, '//a[contains(@href, :path)]', [':path' => $more_path]), 'Make sure the read more link points to the right destination.');
 
     $name_field->options['alter']['more_link'] = FALSE;
     $output = $renderer->executeInRenderContext(new RenderContext(), function () use ($name_field, $row) {
       return $name_field->advancedRender($row);
     });
     $this->assertNotSubString($output, $more_text, 'Make sure no read more text appears.');
-    $this->assertFalse($this->xpathContent($output, '//a[contains(@href, :path)]', array(':path' => $more_path)), 'Make sure no read more link appears.');
+    $this->assertFalse($this->xpathContent($output, '//a[contains(@href, :path)]', [':path' => $more_path]), 'Make sure no read more link appears.');
 
     // Check for the ellipses.
     $row->views_test_data_name = $this->randomMachineName(8);
diff --git a/core/modules/views/src/Tests/Handler/FilterDateTest.php b/core/modules/views/src/Tests/Handler/FilterDateTest.php
index 2045b8aff33f655787b8f9e3d68dc1977522f816..52789f40741d8545359981d6bff3dd165798e495 100644
--- a/core/modules/views/src/Tests/Handler/FilterDateTest.php
+++ b/core/modules/views/src/Tests/Handler/FilterDateTest.php
@@ -16,27 +16,27 @@ class FilterDateTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_filter_date_between');
+  public static $testViews = ['test_filter_date_between'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'views_ui');
+  public static $modules = ['node', 'views_ui'];
 
   protected function setUp() {
     parent::setUp();
     // Add some basic test nodes.
-    $this->nodes = array();
-    $this->nodes[] = $this->drupalCreateNode(array('created' => 100000));
-    $this->nodes[] = $this->drupalCreateNode(array('created' => 200000));
-    $this->nodes[] = $this->drupalCreateNode(array('created' => 300000));
-    $this->nodes[] = $this->drupalCreateNode(array('created' => time() + 86400));
+    $this->nodes = [];
+    $this->nodes[] = $this->drupalCreateNode(['created' => 100000]);
+    $this->nodes[] = $this->drupalCreateNode(['created' => 200000]);
+    $this->nodes[] = $this->drupalCreateNode(['created' => 300000]);
+    $this->nodes[] = $this->drupalCreateNode(['created' => time() + 86400]);
 
-    $this->map = array(
+    $this->map = [
       'nid' => 'nid',
-    );
+    ];
   }
 
   /**
@@ -60,9 +60,9 @@ protected function _testOffset() {
     $view->filter['created']->value['type'] = 'offset';
     $view->filter['created']->value['value'] = '+1 hour';
     $view->executeDisplay('default');
-    $expected_result = array(
-      array('nid' => $this->nodes[3]->id()),
-    );
+    $expected_result = [
+      ['nid' => $this->nodes[3]->id()],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $this->map);
     $view->destroy();
 
@@ -73,9 +73,9 @@ protected function _testOffset() {
     $view->filter['created']->value['max'] = '+2 days';
     $view->filter['created']->value['min'] = '+1 hour';
     $view->executeDisplay('default');
-    $expected_result = array(
-      array('nid' => $this->nodes[3]->id()),
-    );
+    $expected_result = [
+      ['nid' => $this->nodes[3]->id()],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $this->map);
   }
 
@@ -91,9 +91,9 @@ protected function _testBetween() {
     $view->filter['created']->value['min'] = format_date(150000, 'custom', 'Y-m-d H:i:s');
     $view->filter['created']->value['max'] = format_date(200000, 'custom', 'Y-m-d H:i:s');
     $view->executeDisplay('default');
-    $expected_result = array(
-      array('nid' => $this->nodes[1]->id()),
-    );
+    $expected_result = [
+      ['nid' => $this->nodes[1]->id()],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $this->map);
     $view->destroy();
 
@@ -102,10 +102,10 @@ protected function _testBetween() {
     $view->filter['created']->operator = 'between';
     $view->filter['created']->value['max'] = format_date(200000, 'custom', 'Y-m-d H:i:s');
     $view->executeDisplay('default');
-    $expected_result = array(
-      array('nid' => $this->nodes[0]->id()),
-      array('nid' => $this->nodes[1]->id()),
-    );
+    $expected_result = [
+      ['nid' => $this->nodes[0]->id()],
+      ['nid' => $this->nodes[1]->id()],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $this->map);
     $view->destroy();
 
@@ -116,10 +116,10 @@ protected function _testBetween() {
     $view->filter['created']->value['max'] = format_date(200000, 'custom', 'Y-m-d H:i:s');
 
     $view->executeDisplay('default');
-    $expected_result = array(
-      array('nid' => $this->nodes[2]->id()),
-      array('nid' => $this->nodes[3]->id()),
-    );
+    $expected_result = [
+      ['nid' => $this->nodes[2]->id()],
+      ['nid' => $this->nodes[3]->id()],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $this->map);
     $view->destroy();
 
@@ -128,10 +128,10 @@ protected function _testBetween() {
     $view->filter['created']->operator = 'not between';
     $view->filter['created']->value['max'] = format_date(200000, 'custom', 'Y-m-d H:i:s');
     $view->executeDisplay('default');
-    $expected_result = array(
-      array('nid' => $this->nodes[2]->id()),
-      array('nid' => $this->nodes[3]->id()),
-    );
+    $expected_result = [
+      ['nid' => $this->nodes[2]->id()],
+      ['nid' => $this->nodes[3]->id()],
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $this->map);
   }
 
@@ -140,12 +140,12 @@ protected function _testBetween() {
    */
   protected function _testUiValidation() {
 
-    $this->drupalLogin($this->drupalCreateUser(array('administer views', 'administer site configuration')));
+    $this->drupalLogin($this->drupalCreateUser(['administer views', 'administer site configuration']));
 
     $this->drupalGet('admin/structure/views/view/test_filter_date_between/edit');
     $this->drupalGet('admin/structure/views/nojs/handler/test_filter_date_between/default/filter/created');
 
-    $edit = array();
+    $edit = [];
     // Generate a definitive wrong value, which should be checked by validation.
     $edit['options[value][value]'] = $this->randomString() . '-------';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
diff --git a/core/modules/views/src/Tests/Handler/HandlerAllTest.php b/core/modules/views/src/Tests/Handler/HandlerAllTest.php
index c15ce57e823227ee318e2fdf30039760c8e75dc9..565437657e7210bf119781ac10802416e4da5316 100644
--- a/core/modules/views/src/Tests/Handler/HandlerAllTest.php
+++ b/core/modules/views/src/Tests/Handler/HandlerAllTest.php
@@ -22,7 +22,7 @@ class HandlerAllTest extends HandlerTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'aggregator',
     'book',
     'block',
@@ -40,13 +40,13 @@ class HandlerAllTest extends HandlerTestBase {
     'statistics',
     'taxonomy',
     'user',
-  );
+  ];
 
   /**
    * Tests most of the handlers.
    */
   public function testHandlers() {
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
     $this->addDefaultCommentField('node', 'article');
 
     $object_types = array_keys(ViewExecutable::getHandlerTypes());
@@ -55,7 +55,7 @@ public function testHandlers() {
         continue;
       }
 
-      $view = View::create(array('base_table' => $base_table));
+      $view = View::create(['base_table' => $base_table]);
       $view = $view->getExecutable();
 
       // @todo The groupwise relationship is currently broken.
@@ -66,18 +66,18 @@ public function testHandlers() {
       foreach ($info as $field => $field_info) {
         // Table is a reserved key for the metainformation.
         if ($field != 'table' && !in_array("$base_table:$field", $exclude)) {
-          $item = array(
+          $item = [
             'table' => $base_table,
             'field' => $field,
-          );
+          ];
           foreach ($object_types as $type) {
             if (isset($field_info[$type]['id'])) {
-              $options = array();
+              $options = [];
               if ($type == 'filter') {
                 $handler = $this->container->get("plugin.manager.views.$type")->getHandler($item);
                 // Set the value to use for the filter based on the filter type.
                 if ($handler instanceof InOperator) {
-                  $options['value'] = array(1);
+                  $options['value'] = [1];
                 }
                 else {
                   $options['value'] = 1;
@@ -102,10 +102,10 @@ public function testHandlers() {
           foreach ($view->{$type} as $handler) {
             $this->assertTrue($handler instanceof HandlerBase, format_string(
               '@type handler of class %class is an instance of HandlerBase',
-              array(
+              [
                 '@type' => $type,
                 '%class' => get_class($handler),
-              )));
+              ]));
           }
         }
       }
diff --git a/core/modules/views/src/Tests/Handler/HandlerTest.php b/core/modules/views/src/Tests/Handler/HandlerTest.php
index 8ff4033b5ef3eefb42093e9d21272f8292c9499e..e07beb38345e5b2ce1a7519e12570c73bc910040 100644
--- a/core/modules/views/src/Tests/Handler/HandlerTest.php
+++ b/core/modules/views/src/Tests/Handler/HandlerTest.php
@@ -23,18 +23,18 @@ class HandlerTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'test_view_handler_weight', 'test_handler_relationships', 'test_handler_test_access', 'test_filter_in_operator_ui');
+  public static $testViews = ['test_view', 'test_view_handler_weight', 'test_handler_relationships', 'test_handler_test_access', 'test_filter_in_operator_ui'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'comment', 'node');
+  public static $modules = ['views_ui', 'comment', 'node'];
 
   protected function setUp() {
     parent::setUp();
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     $this->addDefaultCommentField('node', 'page');
     $this->enableViewsTestModule();
   }
@@ -56,7 +56,7 @@ protected function viewsData() {
         $data['views_test_data']['access_callback'][$type]['access callback'] = 'views_test_data_handler_test_access_callback';
 
         $data['views_test_data']['access_callback_arguments'][$type]['access callback'] = 'views_test_data_handler_test_access_callback_argument';
-        $data['views_test_data']['access_callback_arguments'][$type]['access arguments'] = array(TRUE);
+        $data['views_test_data']['access_callback_arguments'][$type]['access arguments'] = [TRUE];
       }
     }
 
@@ -68,45 +68,45 @@ protected function viewsData() {
    */
   public function testBreakString() {
     // Check defaults.
-    $this->assertEqual((object) array('value' => array(), 'operator' => NULL), HandlerBase::breakString(''));
+    $this->assertEqual((object) ['value' => [], 'operator' => NULL], HandlerBase::breakString(''));
 
     // Test ors
     $handler = HandlerBase::breakString('word1 word2+word');
-    $this->assertEqualValue(array('word1', 'word2', 'word'), $handler);
+    $this->assertEqualValue(['word1', 'word2', 'word'], $handler);
     $this->assertEqual('or', $handler->operator);
     $handler = HandlerBase::breakString('word1+word2+word');
-    $this->assertEqualValue(array('word1', 'word2', 'word'), $handler);
+    $this->assertEqualValue(['word1', 'word2', 'word'], $handler);
     $this->assertEqual('or', $handler->operator);
     $handler = HandlerBase::breakString('word1 word2 word');
-    $this->assertEqualValue(array('word1', 'word2', 'word'), $handler);
+    $this->assertEqualValue(['word1', 'word2', 'word'], $handler);
     $this->assertEqual('or', $handler->operator);
     $handler = HandlerBase::breakString('word-1+word-2+word');
-    $this->assertEqualValue(array('word-1', 'word-2', 'word'), $handler);
+    $this->assertEqualValue(['word-1', 'word-2', 'word'], $handler);
     $this->assertEqual('or', $handler->operator);
     $handler = HandlerBase::breakString('wõrd1+wõrd2+wõrd');
-    $this->assertEqualValue(array('wõrd1', 'wõrd2', 'wõrd'), $handler);
+    $this->assertEqualValue(['wõrd1', 'wõrd2', 'wõrd'], $handler);
     $this->assertEqual('or', $handler->operator);
 
     // Test ands.
     $handler = HandlerBase::breakString('word1,word2,word');
-    $this->assertEqualValue(array('word1', 'word2', 'word'), $handler);
+    $this->assertEqualValue(['word1', 'word2', 'word'], $handler);
     $this->assertEqual('and', $handler->operator);
     $handler = HandlerBase::breakString('word1 word2,word');
-    $this->assertEqualValue(array('word1 word2', 'word'), $handler);
+    $this->assertEqualValue(['word1 word2', 'word'], $handler);
     $this->assertEqual('and', $handler->operator);
     $handler = HandlerBase::breakString('word1,word2 word');
-    $this->assertEqualValue(array('word1', 'word2 word'), $handler);
+    $this->assertEqualValue(['word1', 'word2 word'], $handler);
     $this->assertEqual('and', $handler->operator);
     $handler = HandlerBase::breakString('word-1,word-2,word');
-    $this->assertEqualValue(array('word-1', 'word-2', 'word'), $handler);
+    $this->assertEqualValue(['word-1', 'word-2', 'word'], $handler);
     $this->assertEqual('and', $handler->operator);
     $handler = HandlerBase::breakString('wõrd1,wõrd2,wõrd');
-    $this->assertEqualValue(array('wõrd1', 'wõrd2', 'wõrd'), $handler);
+    $this->assertEqualValue(['wõrd1', 'wõrd2', 'wõrd'], $handler);
     $this->assertEqual('and', $handler->operator);
 
     // Test a single word
     $handler = HandlerBase::breakString('word');
-    $this->assertEqualValue(array('word'), $handler);
+    $this->assertEqualValue(['word'], $handler);
     $this->assertEqual('and', $handler->operator);
 
     $s1 = $this->randomMachineName();
@@ -117,45 +117,45 @@ public function testBreakString() {
 
     // Test "or"s.
     $handlerBase = HandlerBase::breakString("$s1 $n2+$n3");
-    $this->assertEqualValue(array($s1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([$s1, $n2, $n3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1+$n2+$n3");
-    $this->assertEqualValue(array($s1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([$s1, $n2, $n3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1 $n2 $n3");
-    $this->assertEqualValue(array($s1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([$s1, $n2, $n3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1 $n2++$n3");
-    $this->assertEqualValue(array($s1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([$s1, $n2, $n3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     // Test "and"s.
     $handlerBase = HandlerBase::breakString("$s1,$n2,$n3");
-    $this->assertEqualValue(array($s1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([$s1, $n2, $n3], $handlerBase);
     $this->assertEqual('and', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1,,$n2,$n3");
-    $this->assertEqualValue(array($s1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([$s1, $n2, $n3], $handlerBase);
     $this->assertEqual('and', $handlerBase->operator);
 
     // Enforce int values.
     $handlerBase = HandlerBase::breakString("$n1,$n2,$n3", TRUE);
-    $this->assertEqualValue(array($n1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([$n1, $n2, $n3], $handlerBase);
     $this->assertEqual('and', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$n1+$n2+$n3", TRUE);
-    $this->assertEqualValue(array($n1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([$n1, $n2, $n3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1,$n2,$n3", TRUE);
-    $this->assertEqualValue(array((int) $s1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([(int) $s1, $n2, $n3], $handlerBase);
     $this->assertEqual('and', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1+$n2+$n3", TRUE);
-    $this->assertEqualValue(array((int) $s1, $n2, $n3), $handlerBase);
+    $this->assertEqualValue([(int) $s1, $n2, $n3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     // Generate three random decimals which can be used below;
@@ -165,28 +165,28 @@ public function testBreakString() {
 
     // Test "or"s.
     $handlerBase = HandlerBase::breakString("$s1 $d1+$d2");
-    $this->assertEqualValue(array($s1, $d1, $d2), $handlerBase);
+    $this->assertEqualValue([$s1, $d1, $d2], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1+$d1+$d3");
-    $this->assertEqualValue(array($s1, $d1, $d3), $handlerBase);
+    $this->assertEqualValue([$s1, $d1, $d3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1 $d2 $d3");
-    $this->assertEqualValue(array($s1, $d2, $d3), $handlerBase);
+    $this->assertEqualValue([$s1, $d2, $d3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1 $d2++$d3");
-    $this->assertEqualValue(array($s1, $d2, $d3), $handlerBase);
+    $this->assertEqualValue([$s1, $d2, $d3], $handlerBase);
     $this->assertEqual('or', $handlerBase->operator);
 
     // Test "and"s.
     $handlerBase = HandlerBase::breakString("$s1,$d2,$d3");
-    $this->assertEqualValue(array($s1, $d2, $d3), $handlerBase);
+    $this->assertEqualValue([$s1, $d2, $d3], $handlerBase);
     $this->assertEqual('and', $handlerBase->operator);
 
     $handlerBase = HandlerBase::breakString("$s1,,$d2,$d3");
-    $this->assertEqualValue(array($s1, $d2, $d3), $handlerBase);
+    $this->assertEqualValue([$s1, $d2, $d3], $handlerBase);
     $this->assertEqual('and', $handlerBase->operator);
   }
 
@@ -194,13 +194,13 @@ public function testBreakString() {
    * Tests the order of handlers is the same before and after saving.
    */
   public function testHandlerWeights() {
-    $handler_types = array('fields', 'filters', 'sorts');
+    $handler_types = ['fields', 'filters', 'sorts'];
 
     $view = Views::getView('test_view_handler_weight');
     $view->initDisplay();
 
     // Store the order of handlers before saving the view.
-    $original_order = array();
+    $original_order = [];
     foreach ($handler_types as $type) {
       $original_order[$type] = array_keys($view->display_handler->getOption($type));
     }
@@ -233,7 +233,7 @@ public function testHandlerWeights() {
    */
   protected function assertEqualValue($expected, $handler, $message = '', $group = 'Other') {
     if (empty($message)) {
-      $message = t('Comparing @first and @second', array('@first' => implode(',', $expected), '@second' => implode(',', $handler->value)));
+      $message = t('Comparing @first and @second', ['@first' => implode(',', $expected), '@second' => implode(',', $handler->value)]);
     }
 
     return $this->assert($expected == $handler->value, $message, $group);
@@ -243,7 +243,7 @@ protected function assertEqualValue($expected, $handler, $message = '', $group =
    * Tests the relationship ui for field/filter/argument/relationship.
    */
   public function testRelationshipUI() {
-    $views_admin = $this->drupalCreateUser(array('administer views'));
+    $views_admin = $this->drupalCreateUser(['administer views']);
     $this->drupalLogin($views_admin);
 
     // Make sure the link to the field options exists.
@@ -262,18 +262,18 @@ public function testRelationshipUI() {
     // Check for available options.
     $xpath = $this->constructFieldXpath('name', $relationship_name);
     $fields = $this->xpath($xpath);
-    $options = array();
+    $options = [];
     foreach ($fields as $field) {
       $items = $this->getAllOptions($field);
       foreach ($items as $item) {
         $options[] = $item->attributes()->value;
       }
     }
-    $expected_options = array('none', 'nid');
+    $expected_options = ['none', 'nid'];
     $this->assertEqual($options, $expected_options);
 
     // Remove the relationship and make sure no relationship option appears.
-    $this->drupalPostForm('admin/structure/views/nojs/handler/test_handler_relationships/default/relationship/nid', array(), t('Remove'));
+    $this->drupalPostForm('admin/structure/views/nojs/handler/test_handler_relationships/default/relationship/nid', [], t('Remove'));
     $this->drupalGet($handler_options_path);
     $this->assertNoFieldByName($relationship_name, NULL, 'Make sure that no relationship option is available');
 
@@ -298,9 +298,9 @@ public function testSetRelationship() {
     $view = Views::getView('test_handler_relationships');
     $view->setDisplay();
     // Setup a broken relationship.
-    $view->addHandler('default', 'relationship', $this->randomMachineName(), $this->randomMachineName(), array(), 'broken_relationship');
+    $view->addHandler('default', 'relationship', $this->randomMachineName(), $this->randomMachineName(), [], 'broken_relationship');
     // Setup a valid relationship.
-    $view->addHandler('default', 'relationship', 'comment_field_data', 'node', array('relationship' => 'cid'), 'valid_relationship');
+    $view->addHandler('default', 'relationship', 'comment_field_data', 'node', ['relationship' => 'cid'], 'valid_relationship');
     $view->initHandlers();
     $field = $view->field['title'];
 
@@ -377,7 +377,7 @@ public function testAccess() {
     $view->initHandlers();
 
     foreach ($views_data['access_callback'] as $type => $info) {
-      if (!in_array($type, array('title', 'help'))) {
+      if (!in_array($type, ['title', 'help'])) {
         $this->assertTrue($view->field['access_callback'] instanceof HandlerBase, 'Make sure the user got access to the access_callback field ');
         $this->assertFalse(isset($view->field['access_callback_arguments']), 'Make sure the user got no access to the access_callback_arguments field ');
       }
@@ -391,7 +391,7 @@ public function testAccess() {
     $view->initHandlers();
 
     foreach ($views_data['access_callback'] as $type => $info) {
-      if (!in_array($type, array('title', 'help'))) {
+      if (!in_array($type, ['title', 'help'])) {
         $this->assertFalse(isset($view->field['access_callback']), 'Make sure the user got no access to the access_callback field ');
         $this->assertTrue($view->field['access_callback_arguments'] instanceof HandlerBase, 'Make sure the user got access to the access_callback_arguments field ');
       }
diff --git a/core/modules/views/src/Tests/Plugin/AccessTest.php b/core/modules/views/src/Tests/Plugin/AccessTest.php
index 1bcf30013c541ae862eef86ca509761ea119ff43..2278f6771c8ecec1cb42df24527782b3a91238bc 100644
--- a/core/modules/views/src/Tests/Plugin/AccessTest.php
+++ b/core/modules/views/src/Tests/Plugin/AccessTest.php
@@ -19,14 +19,14 @@ class AccessTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_access_none', 'test_access_static', 'test_access_dynamic');
+  public static $testViews = ['test_access_none', 'test_access_static', 'test_access_dynamic'];
 
   /**
    * Modules to enable.
    *
    * @return array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Web user for testing.
@@ -47,12 +47,12 @@ protected function setUp() {
 
     $this->enableViewsTestModule();
 
-    ViewTestData::createTestViews(get_class($this), array('views_test_data'));
+    ViewTestData::createTestViews(get_class($this), ['views_test_data']);
 
     $this->webUser = $this->drupalCreateUser();
 
-    $normal_role = $this->drupalCreateRole(array());
-    $this->normalUser = $this->drupalCreateUser(array('views_test_data test permission'));
+    $normal_role = $this->drupalCreateRole([]);
+    $this->normalUser = $this->drupalCreateUser(['views_test_data test permission']);
     $this->normalUser->addRole($normal_role);
     // @todo when all the plugin information is cached make a reset function and
     // call it here.
diff --git a/core/modules/views/src/Tests/Plugin/ArgumentDefaultTest.php b/core/modules/views/src/Tests/Plugin/ArgumentDefaultTest.php
index 5abc27c83cea851f24700f536eeec42077f9562a..a4e82172e0903ae4f06eccc849473323b2da89d5 100644
--- a/core/modules/views/src/Tests/Plugin/ArgumentDefaultTest.php
+++ b/core/modules/views/src/Tests/Plugin/ArgumentDefaultTest.php
@@ -22,20 +22,20 @@ class ArgumentDefaultTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array(
+  public static $testViews = [
     'test_view',
     'test_argument_default_fixed',
     'test_argument_default_current_user',
     'test_argument_default_node',
     'test_argument_default_query_param',
-    );
+    ];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'views_ui', 'block');
+  public static $modules = ['node', 'views_ui', 'block'];
 
   protected function setUp() {
     parent::setUp();
@@ -52,13 +52,13 @@ public function testArgumentDefaultPlugin() {
     $view = Views::getView('test_view');
 
     // Add a new argument and set the test plugin for the argument_default.
-    $options = array(
+    $options = [
       'default_argument_type' => 'argument_default_test',
-      'default_argument_options' => array(
+      'default_argument_options' => [
         'value' => 'John'
-      ),
+      ],
       'default_action' => 'default'
-    );
+    ];
     $id = $view->addHandler('default', 'argument', 'views_test_data', 'name', $options);
     $view->initHandlers();
     $plugin = $view->argument[$id]->getPlugin('argument_default');
@@ -70,15 +70,15 @@ public function testArgumentDefaultPlugin() {
     // just returns John.
     $this->executeView($view);
     $this->assertEqual($view->argument[$id]->getValue(), 'John', 'The correct argument value is used.');
-    $expected_result = array(array('name' => 'John'));
-    $this->assertIdenticalResultset($view, $expected_result, array('views_test_data_name' => 'name'));
+    $expected_result = [['name' => 'John']];
+    $this->assertIdenticalResultset($view, $expected_result, ['views_test_data_name' => 'name']);
 
     // Pass in value as argument to be sure that not the default value is used.
     $view->destroy();
-    $this->executeView($view, array('George'));
+    $this->executeView($view, ['George']);
     $this->assertEqual($view->argument[$id]->getValue(), 'George', 'The correct argument value is used.');
-    $expected_result = array(array('name' => 'George'));
-    $this->assertIdenticalResultset($view, $expected_result, array('views_test_data_name' => 'name'));
+    $expected_result = [['name' => 'George']];
+    $this->assertIdenticalResultset($view, $expected_result, ['views_test_data_name' => 'name']);
   }
 
 
@@ -86,24 +86,24 @@ public function testArgumentDefaultPlugin() {
    * Tests the use of a default argument plugin that provides no options.
    */
   public function testArgumentDefaultNoOptions() {
-    $admin_user = $this->drupalCreateUser(array('administer views', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer views', 'administer site configuration']);
     $this->drupalLogin($admin_user);
 
     // The current_user plugin has no options form, and should pass validation.
     $argument_type = 'current_user';
-    $edit = array(
+    $edit = [
       'options[default_argument_type]' => $argument_type,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/handler/test_argument_default_current_user/default/argument/uid', $edit, t('Apply'));
 
     // Note, the undefined index error has two spaces after it.
-    $error = array(
+    $error = [
       '%type' => 'Notice',
       '@message' => 'Undefined index:  ' . $argument_type,
       '%function' => 'views_handler_argument->validateOptionsForm()',
-    );
+    ];
     $message = t('%type: @message in %function', $error);
-    $this->assertNoRaw($message, format_string('Did not find error message: @message.', array('@message' => $message)));
+    $this->assertNoRaw($message, format_string('Did not find error message: @message.', ['@message' => $message]));
   }
 
   /**
@@ -122,7 +122,7 @@ public function testArgumentDefaultFixed() {
 
     // Make sure that a normal argument provided is used
     $random_string = $this->randomMachineName();
-    $view->executeDisplay('default', array($random_string));
+    $view->executeDisplay('default', [$random_string]);
 
     $this->assertEqual($view->args[0], $random_string, 'Provided argument should be used.');
   }
@@ -137,13 +137,13 @@ public function testArgumentDefaultFixed() {
    */
   public function testArgumentDefaultNode() {
     // Create a user that has permission to place a view block.
-    $permissions = array(
+    $permissions = [
       'administer views',
       'administer blocks',
       'bypass node access',
       'access user profiles',
       'view all revisions',
-      );
+      ];
     $views_admin = $this->drupalCreateUser($permissions);
     $this->drupalLogin($views_admin);
 
diff --git a/core/modules/views/src/Tests/Plugin/CacheTagTest.php b/core/modules/views/src/Tests/Plugin/CacheTagTest.php
index eaee6569d1073972235f5401f3e3f896c1d23a82..72d94f3cf34aabed531787fbe1a9c48851ddc7a6 100644
--- a/core/modules/views/src/Tests/Plugin/CacheTagTest.php
+++ b/core/modules/views/src/Tests/Plugin/CacheTagTest.php
@@ -19,14 +19,14 @@ class CacheTagTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_tag_cache');
+  public static $testViews = ['test_tag_cache'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * The node storage.
@@ -73,17 +73,17 @@ class CacheTagTest extends PluginTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
-    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
 
     $this->nodeStorage = $this->container->get('entity.manager')->getStorage('node');
     $this->nodeViewBuilder = $this->container->get('entity.manager')->getViewBuilder('node');
     $this->userViewBuilder = $this->container->get('entity.manager')->getViewBuilder('user');
 
     for ($i = 1; $i <= 5; $i++) {
-      $this->pages[] = $this->drupalCreateNode(array('title' => "Test $i", 'type' => 'page'));
+      $this->pages[] = $this->drupalCreateNode(['title' => "Test $i", 'type' => 'page']);
     }
-    $this->article = $this->drupalCreateNode(array('title' => "Test article", 'type' => 'article'));
+    $this->article = $this->drupalCreateNode(['title' => "Test article", 'type' => 'article']);
     $this->user = $this->drupalCreateUser();
 
     // Mark the current request safe, in order to make render cache working, see
@@ -183,7 +183,7 @@ public function testTagCaching() {
     $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found.');
     $this->assertTrue($this->getRenderCache($view), 'Output cache found.');
 
-    $this->userViewBuilder->resetCache(array($this->user));
+    $this->userViewBuilder->resetCache([$this->user]);
 
     $cache_plugin = $view->display_handler->getPlugin('cache');
     $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found after a user is invalidated.');
diff --git a/core/modules/views/src/Tests/Plugin/CacheWebTest.php b/core/modules/views/src/Tests/Plugin/CacheWebTest.php
index f41e786e4686f1aca32f9c3085dd3fb71ac82518..7786606376aff848c1a1221d750f522d479ebc17 100644
--- a/core/modules/views/src/Tests/Plugin/CacheWebTest.php
+++ b/core/modules/views/src/Tests/Plugin/CacheWebTest.php
@@ -21,14 +21,14 @@ class CacheWebTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_display');
+  public static $testViews = ['test_display'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * {@inheritdoc}
@@ -46,13 +46,13 @@ public function testCacheOutputOnPage() {
     $view = Views::getView('test_display');
     $view->storage->setStatus(TRUE);
     $view->setDisplay('page_1');
-    $view->display_handler->overrideOption('cache', array(
+    $view->display_handler->overrideOption('cache', [
       'type' => 'time',
-      'options' => array(
+      'options' => [
         'results_lifespan' => '3600',
         'output_lifespan' => '3600'
-      )
-    ));
+      ]
+    ]);
     $view->save();
     $this->container->get('router.builder')->rebuildIfNeeded();
 
diff --git a/core/modules/views/src/Tests/Plugin/DisabledDisplayTest.php b/core/modules/views/src/Tests/Plugin/DisabledDisplayTest.php
index 9238dda36f7694722dbd298823b45471513710c6..cb43946913376bce49e69b1660325919797b7454 100644
--- a/core/modules/views/src/Tests/Plugin/DisabledDisplayTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisabledDisplayTest.php
@@ -15,14 +15,14 @@ class DisabledDisplayTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_disabled_display');
+  public static $testViews = ['test_disabled_display'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('block', 'node', 'views');
+  public static $modules = ['block', 'node', 'views'];
 
   protected function setUp() {
     parent::setUp();
@@ -31,7 +31,7 @@ protected function setUp() {
 
     $this->drupalPlaceBlock('page_title_block');
 
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
   }
 
@@ -44,7 +44,7 @@ protected function setUp() {
    */
   public function testDisabledDisplays() {
     // The displays defined in this view.
-    $display_ids = array('attachment_1', 'block_1', 'embed_1', 'feed_1', 'page_2');
+    $display_ids = ['attachment_1', 'block_1', 'embed_1', 'feed_1', 'page_2'];
 
     $this->drupalCreateContentType(['type' => 'page']);
     $this->drupalCreateNode();
diff --git a/core/modules/views/src/Tests/Plugin/DisplayAttachmentTest.php b/core/modules/views/src/Tests/Plugin/DisplayAttachmentTest.php
index 88db8b1b926bab907305fe2eee0c9928baf4f430..16c0680b36d718725cf4220d5c69e1d17f6e19d9 100644
--- a/core/modules/views/src/Tests/Plugin/DisplayAttachmentTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisplayAttachmentTest.php
@@ -17,21 +17,21 @@ class DisplayAttachmentTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_display_attachment', 'test_attached_disabled');
+  public static $testViews = ['test_display_attachment', 'test_attached_disabled'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'views');
+  public static $modules = ['node', 'views'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->enableViewsTestModule();
 
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
   }
 
diff --git a/core/modules/views/src/Tests/Plugin/DisplayEntityReferenceTest.php b/core/modules/views/src/Tests/Plugin/DisplayEntityReferenceTest.php
index 96d0369263a85f8ec5fe3812dd9a463fe2ede8a1..ac7209c28419b3c9b1e8250e0e1c963c1db31051 100644
--- a/core/modules/views/src/Tests/Plugin/DisplayEntityReferenceTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisplayEntityReferenceTest.php
@@ -24,14 +24,14 @@ class DisplayEntityReferenceTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_display_entity_reference');
+  public static $testViews = ['test_display_entity_reference'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'field', 'views_ui');
+  public static $modules = ['entity_test', 'field', 'views_ui'];
 
   /**
    * The used field name in the test.
@@ -67,7 +67,7 @@ class DisplayEntityReferenceTest extends PluginTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalLogin($this->drupalCreateUser(array('administer views')));
+    $this->drupalLogin($this->drupalCreateUser(['administer views']));
 
     // Create the text field.
     $this->fieldName = 'field_test_entity_ref_display';
diff --git a/core/modules/views/src/Tests/Plugin/DisplayExtenderTest.php b/core/modules/views/src/Tests/Plugin/DisplayExtenderTest.php
index 33c3713c1e1c3b31524a627666e51d3c1a110959..896b1348dd21d86e936be7fde0ae976ffc627b98 100644
--- a/core/modules/views/src/Tests/Plugin/DisplayExtenderTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisplayExtenderTest.php
@@ -18,7 +18,7 @@ class DisplayExtenderTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   protected function setUp() {
     parent::setUp();
@@ -30,7 +30,7 @@ protected function setUp() {
    * Test display extenders.
    */
   public function testDisplayExtenders() {
-    $this->config('views.settings')->set('display_extenders', array('display_extender_test'))->save();
+    $this->config('views.settings')->set('display_extenders', ['display_extender_test'])->save();
     $this->assertEqual(count(Views::getEnabledDisplayExtenders()), 1, 'Make sure that there is only one enabled display extender.');
 
     $view = Views::getView('test_view');
diff --git a/core/modules/views/src/Tests/Plugin/DisplayFeedTest.php b/core/modules/views/src/Tests/Plugin/DisplayFeedTest.php
index d31f457bcc74a1aac85b82e09e309d5df974e2d1..2a3dc4ecd184b316d4dd7cd53fe39e09fd3aa1ae 100644
--- a/core/modules/views/src/Tests/Plugin/DisplayFeedTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisplayFeedTest.php
@@ -17,21 +17,21 @@ class DisplayFeedTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_display_feed', 'test_attached_disabled', 'test_feed_icon');
+  public static $testViews = ['test_display_feed', 'test_attached_disabled', 'test_feed_icon'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('block', 'node', 'views');
+  public static $modules = ['block', 'node', 'views'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->enableViewsTestModule();
 
-    $admin_user = $this->drupalCreateUser(array('administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($admin_user);
   }
 
@@ -101,13 +101,13 @@ public function testFeedFieldOutput() {
 
     // Verify a title with HTML entities is properly escaped.
     $node_title = 'This "cool" & "neat" article\'s title';
-    $this->drupalCreateNode(array(
+    $this->drupalCreateNode([
       'title' => $node_title,
       'body' => [0 => [
         'value' => 'A paragraph',
         'format' => filter_default_format(),
       ]],
-    ));
+    ]);
 
     $this->drupalGet('test-feed-display-fields.xml');
     $result = $this->xpath('//title/a');
diff --git a/core/modules/views/src/Tests/Plugin/DisplayPageWebTest.php b/core/modules/views/src/Tests/Plugin/DisplayPageWebTest.php
index acb3af86f1295b4b83fed3332890231e5455d088..b5c853faec5a5223ee4de40b00ef3710c5c7a068 100644
--- a/core/modules/views/src/Tests/Plugin/DisplayPageWebTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisplayPageWebTest.php
@@ -19,7 +19,7 @@ class DisplayPageWebTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_page_display', 'test_page_display_arguments', 'test_page_display_menu', 'test_page_display_path');
+  public static $testViews = ['test_page_display', 'test_page_display_arguments', 'test_page_display_menu', 'test_page_display_path'];
 
   /**
    * Modules to enable.
@@ -88,10 +88,10 @@ public function testPageDisplayMenu() {
     // Check local tasks.
     $this->drupalGet('test_page_display_menu');
     $this->assertResponse(200);
-    $element = $this->xpath('//ul[contains(@class, :ul_class)]//a[contains(@class, :a_class)]', array(
+    $element = $this->xpath('//ul[contains(@class, :ul_class)]//a[contains(@class, :a_class)]', [
       ':ul_class' => 'tabs primary',
       ':a_class' => 'is-active',
-    ));
+    ]);
     $this->assertEqual((string) $element[0], t('Test default tab'));
     $this->assertTitle(t('Test default page | Drupal'));
 
@@ -100,10 +100,10 @@ public function testPageDisplayMenu() {
 
     $this->drupalGet('test_page_display_menu/local');
     $this->assertResponse(200);
-    $element = $this->xpath('//ul[contains(@class, :ul_class)]//a[contains(@class, :a_class)]', array(
+    $element = $this->xpath('//ul[contains(@class, :ul_class)]//a[contains(@class, :a_class)]', [
       ':ul_class' => 'tabs primary',
       ':a_class' => 'is-active',
-    ));
+    ]);
     $this->assertEqual((string) $element[0], t('Test local tab'));
     $this->assertTitle(t('Test local page | Drupal'));
 
diff --git a/core/modules/views/src/Tests/Plugin/DisplayTest.php b/core/modules/views/src/Tests/Plugin/DisplayTest.php
index 3bbfd66b7a5d1e28fc60bf80591db192a3ea2885..42a389cb911644101ffa87291ebe438d1274aacd 100644
--- a/core/modules/views/src/Tests/Plugin/DisplayTest.php
+++ b/core/modules/views/src/Tests/Plugin/DisplayTest.php
@@ -19,26 +19,26 @@ class DisplayTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_filter_groups', 'test_get_attach_displays', 'test_view', 'test_display_more', 'test_display_invalid', 'test_display_empty', 'test_exposed_relationship_admin_ui');
+  public static $testViews = ['test_filter_groups', 'test_get_attach_displays', 'test_view', 'test_display_more', 'test_display_invalid', 'test_display_empty', 'test_exposed_relationship_admin_ui'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'node', 'block');
+  public static $modules = ['views_ui', 'node', 'block'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->enableViewsTestModule();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer views'));
+    $this->adminUser = $this->drupalCreateUser(['administer views']);
     $this->drupalLogin($this->adminUser);
 
     // Create 10 nodes.
     for ($i = 0; $i <= 10; $i++) {
-      $this->drupalCreateNode(array('promote' => TRUE));
+      $this->drupalCreateNode(['promote' => TRUE]);
     }
   }
 
@@ -59,25 +59,25 @@ public function testDisplayPlugin() {
     $this->assertTrue(isset($displays['display_test_1']), 'Added display has been assigned to "display_test_1"');
 
     // Check the display options are like expected.
-    $options = array(
-      'display_options' => array(),
+    $options = [
+      'display_options' => [],
       'display_plugin' => 'display_test',
       'id' => 'display_test_1',
       'display_title' => 'Display test',
       'position' => 1,
-    );
+    ];
     $this->assertEqual($displays['display_test_1'], $options);
 
     // Add another one to ensure that position is counted up.
     $view->storage->addDisplay('display_test');
     $displays = $view->storage->get('display');
-    $options = array(
-      'display_options' => array(),
+    $options = [
+      'display_options' => [],
       'display_plugin' => 'display_test',
       'id' => 'display_test_2',
       'display_title' => 'Display test 2',
       'position' => 2,
-    );
+    ];
     $this->assertEqual($displays['display_test_2'], $options);
 
     // Move the second display before the first one in order to test custom
@@ -120,7 +120,7 @@ public function testDisplayPlugin() {
     $this->clickLink('Test option title');
 
     $test_option = $this->randomString();
-    $this->drupalPostForm(NULL, array('test_option' => $test_option), t('Apply'));
+    $this->drupalPostForm(NULL, ['test_option' => $test_option], t('Apply'));
 
     // Check the new value has been saved by checking the UI summary text.
     $this->drupalGet('admin/structure/views/view/test_view/edit/display_test_1');
@@ -154,10 +154,10 @@ public function testGetAttachedDisplays() {
 
     // Both the feed_1 and the feed_2 display are attached to the page display.
     $view->setDisplay('page_1');
-    $this->assertEqual($view->display_handler->getAttachedDisplays(), array('feed_1', 'feed_2'));
+    $this->assertEqual($view->display_handler->getAttachedDisplays(), ['feed_1', 'feed_2']);
 
     $view->setDisplay('feed_1');
-    $this->assertEqual($view->display_handler->getAttachedDisplays(), array());
+    $this->assertEqual($view->display_handler->getAttachedDisplays(), []);
   }
 
   /**
@@ -179,7 +179,7 @@ public function testReadMore() {
     $output = $renderer->renderRoot($output);
 
     $this->setRawContent($output);
-    $result = $this->xpath('//a[@class=:class]', array(':class' => 'more-link'));
+    $result = $this->xpath('//a[@class=:class]', [':class' => 'more-link']);
     $this->assertEqual($result[0]->attributes()->href, \Drupal::url('view.test_display_more.page_1'), 'The right more link is shown.');
     $this->assertEqual(trim($result[0][0]), $expected_more_text, 'The right link text is shown.');
 
@@ -188,7 +188,7 @@ public function testReadMore() {
     $more_link = $view->display_handler->renderMoreLink();
     $more_link = $renderer->renderRoot($more_link);
     $this->setRawContent($more_link);
-    $result = $this->xpath('//a[@class=:class]', array(':class' => 'more-link'));
+    $result = $this->xpath('//a[@class=:class]', [':class' => 'more-link']);
     $this->assertEqual($result[0]->attributes()->href, \Drupal::url('view.test_display_more.page_1'), 'The right more link is shown.');
     $this->assertEqual(trim($result[0][0]), $expected_more_text, 'The right link text is shown.');
 
@@ -204,25 +204,25 @@ public function testReadMore() {
     $output = $view->preview();
     $output = $renderer->renderRoot($output);
     $this->setRawContent($output);
-    $result = $this->xpath('//a[@class=:class]', array(':class' => 'more-link'));
+    $result = $this->xpath('//a[@class=:class]', [':class' => 'more-link']);
     $this->assertTrue(empty($result), 'The more link is not shown.');
 
     $view = Views::getView('test_display_more');
     $view->setDisplay();
     $view->display_handler->setOption('use_more', 0);
     $view->display_handler->setOption('use_more_always', 0);
-    $view->display_handler->setOption('pager', array(
+    $view->display_handler->setOption('pager', [
       'type' => 'some',
-      'options' => array(
+      'options' => [
         'items_per_page' => 1,
         'offset' => 0,
-      ),
-    ));
+      ],
+    ]);
     $this->executeView($view);
     $output = $view->preview();
     $output = $renderer->renderRoot($output);
     $this->setRawContent($output);
-    $result = $this->xpath('//a[@class=:class]', array(':class' => 'more-link'));
+    $result = $this->xpath('//a[@class=:class]', [':class' => 'more-link']);
     $this->assertTrue(empty($result), 'The more link is not shown when view has more records.');
 
     // Test the default value of use_more_always.
@@ -286,7 +286,7 @@ public function testInvalidDisplayPlugins() {
     $config->save();
 
     // Place the block display.
-    $block = $this->drupalPlaceBlock('views_block:test_display_invalid-block_1', array('label' => 'Invalid display'));
+    $block = $this->drupalPlaceBlock('views_block:test_display_invalid-block_1', ['label' => 'Invalid display']);
 
     $this->drupalGet('<front>');
     $this->assertResponse(200);
@@ -326,8 +326,8 @@ public function testMissingRelationship() {
     $errors = $view->validate();
     // Check that the error messages are shown.
     $this->assertTrue(count($errors['default']) == 2, 'Error messages found for required relationship');
-    $this->assertEqual($errors['default'][0], t('The %handler_type %handler uses a relationship that has been removed.', array('%handler_type' => 'field', '%handler' => 'User: Last login')));
-    $this->assertEqual($errors['default'][1], t('The %handler_type %handler uses a relationship that has been removed.', array('%handler_type' => 'field', '%handler' => 'User: Created')));
+    $this->assertEqual($errors['default'][0], t('The %handler_type %handler uses a relationship that has been removed.', ['%handler_type' => 'field', '%handler' => 'User: Last login']));
+    $this->assertEqual($errors['default'][1], t('The %handler_type %handler uses a relationship that has been removed.', ['%handler_type' => 'field', '%handler' => 'User: Created']));
   }
 
   /**
@@ -342,12 +342,12 @@ public function testOutputIsEmpty() {
 
     // Add a filter, so the view result is empty.
     $view->setDisplay('default');
-    $item = array(
+    $item = [
       'table' => 'views_test_data',
       'field' => 'id',
       'id' => 'id',
-      'value' => array('value' => 7297)
-    );
+      'value' => ['value' => 7297]
+    ];
     $view->setHandler('default', 'filter', 'id', $item);
     $this->executeView($view);
     $this->assertFalse(count($view->result), 'Ensure the result of the view is empty.');
diff --git a/core/modules/views/src/Tests/Plugin/ExposedFormTest.php b/core/modules/views/src/Tests/Plugin/ExposedFormTest.php
index b51129cf4c871d7c5fff5cca19543517e2368b9b..cfb3c0a0713660b5b84f7a644f628fe9dac87876 100644
--- a/core/modules/views/src/Tests/Plugin/ExposedFormTest.php
+++ b/core/modules/views/src/Tests/Plugin/ExposedFormTest.php
@@ -24,25 +24,25 @@ class ExposedFormTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_exposed_form_buttons', 'test_exposed_block', 'test_exposed_form_sort_items_per_page');
+  public static $testViews = ['test_exposed_form_buttons', 'test_exposed_block', 'test_exposed_form_sort_items_per_page'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'views_ui', 'block', 'entity_test');
+  public static $modules = ['node', 'views_ui', 'block', 'entity_test'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->enableViewsTestModule();
 
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
 
     // Create some random nodes.
     for ($i = 0; $i < 5; $i++) {
-      $this->drupalCreateNode(array('type' => 'article'));
+      $this->drupalCreateNode(['type' => 'article']);
     }
   }
 
@@ -90,7 +90,7 @@ public function testExposedIdentifier() {
     $view = Views::getView('test_exposed_form_buttons');
     $view->setDisplay();
     $identifier = 'new_identifier';
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
       'type' => [
         'exposed' => TRUE,
         'field' => 'type',
@@ -107,9 +107,9 @@ public function testExposedIdentifier() {
           'description' => 'Exposed overridden description'
         ],
       ]
-    ));
+    ]);
     $view->save();
-    $this->drupalGet('test_exposed_form_buttons', array('query' => array($identifier => 'article')));
+    $this->drupalGet('test_exposed_form_buttons', ['query' => [$identifier => 'article']]);
     $this->assertFieldById(Html::getId('edit-' . $identifier), 'article', "Article type filter set with new identifier.");
 
     // Alter the identifier of the filter to a random string containing
@@ -117,7 +117,7 @@ public function testExposedIdentifier() {
     $view = Views::getView('test_exposed_form_buttons');
     $view->setDisplay();
     $identifier = 'bad identifier';
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
       'type' => [
         'exposed' => TRUE,
         'field' => 'type',
@@ -134,7 +134,7 @@ public function testExposedIdentifier() {
           'description' => 'Exposed overridden description'
         ],
       ]
-    ));
+    ]);
     $this->executeView($view);
 
     $errors = $view->validate();
@@ -153,12 +153,12 @@ public function testResetButton() {
     $this->drupalGet('test_exposed_form_buttons');
     $this->assertNoField('edit-reset');
 
-    $this->drupalGet('test_exposed_form_buttons', array('query' => array('type' => 'article')));
+    $this->drupalGet('test_exposed_form_buttons', ['query' => ['type' => 'article']]);
     // Test that the type has been set.
     $this->assertFieldById('edit-type', 'article', 'Article type filter set.');
 
     // Test the reset works.
-    $this->drupalGet('test_exposed_form_buttons', array('query' => array('op' => 'Reset')));
+    $this->drupalGet('test_exposed_form_buttons', ['query' => ['op' => 'Reset']]);
     $this->assertResponse(200);
     // Test the type has been reset.
     $this->assertFieldById('edit-type', 'All', 'Article type filter has been reset.');
@@ -167,7 +167,7 @@ public function testResetButton() {
     $this->assertNoField('edit-reset');
 
     // Test the reset works with type set.
-    $this->drupalGet('test_exposed_form_buttons', array('query' => array('type' => 'article', 'op' => 'Reset')));
+    $this->drupalGet('test_exposed_form_buttons', ['query' => ['type' => 'article', 'op' => 'Reset']]);
     $this->assertResponse(200);
     $this->assertFieldById('edit-type', 'All', 'Article type filter has been reset.');
 
@@ -185,7 +185,7 @@ public function testResetButton() {
     $view->save();
 
     // Look whether the reset button label changed.
-    $this->drupalGet('test_exposed_form_buttons', array('query' => array('type' => 'article')));
+    $this->drupalGet('test_exposed_form_buttons', ['query' => ['type' => 'article']]);
     $this->assertResponse(200);
 
     $this->helperButtonHasLabel('edit-reset', $expected_label);
@@ -207,7 +207,7 @@ public function testExposedFormRender() {
     $expected_action = $view->display_handler->getUrlInfo()->toString();
     $this->assertFieldByXPath('//form/@action', $expected_action, 'The expected value for the action attribute was found.');
     // Make sure the description is shown.
-    $result = $this->xpath('//form//div[contains(@id, :id) and normalize-space(text())=:description]', array(':id' => 'edit-type--description', ':description' => t('Exposed description')));
+    $result = $this->xpath('//form//div[contains(@id, :id) and normalize-space(text())=:description]', [':id' => 'edit-type--description', ':description' => t('Exposed description')]);
     $this->assertEqual(count($result), 1, 'Filter description was found.');
   }
 
@@ -220,7 +220,7 @@ public function testExposedFormRenderCheckboxes() {
     $this->drupalCreateNode(['type' => 'page']);
 
     // Use a test theme to convert multi-select elements into checkboxes.
-    \Drupal::service('theme_handler')->install(array('views_test_checkboxes_theme'));
+    \Drupal::service('theme_handler')->install(['views_test_checkboxes_theme']);
     $this->config('system.theme')
       ->set('default', 'views_test_checkboxes_theme')
       ->save();
@@ -264,15 +264,15 @@ public function testExposedBlock() {
     $this->drupalGet('test_exposed_block');
 
     // Test there is an exposed form in a block.
-    $xpath = $this->buildXPathQuery('//div[@id=:id]/form/@id', array(':id' => Html::getUniqueId('block-' . $block->id())));
+    $xpath = $this->buildXPathQuery('//div[@id=:id]/form/@id', [':id' => Html::getUniqueId('block-' . $block->id())]);
     $this->assertFieldByXpath($xpath, $this->getExpectedExposedFormId($view), 'Expected form found in views block.');
 
     // Test there is not an exposed form in the view page content area.
-    $xpath = $this->buildXPathQuery('//div[@class="view-content"]/form/@id', array(':id' => Html::getUniqueId('block-' . $block->id())));
+    $xpath = $this->buildXPathQuery('//div[@class="view-content"]/form/@id', [':id' => Html::getUniqueId('block-' . $block->id())]);
     $this->assertNoFieldByXpath($xpath, $this->getExpectedExposedFormId($view), 'No exposed form found in views content region.');
 
     // Test there is only one views exposed form on the page.
-    $elements = $this->xpath('//form[@id=:id]', array(':id' => $this->getExpectedExposedFormId($view)));
+    $elements = $this->xpath('//form[@id=:id]', [':id' => $this->getExpectedExposedFormId($view)]);
     $this->assertEqual(count($elements), 1, 'One exposed form block found.');
 
     // Test that the correct option is selected after form submission.
@@ -302,7 +302,7 @@ public function testInputRequired() {
     $rows = $this->xpath("//div[contains(@class, 'views-row')]");
     $this->assertEqual(count($rows), 0, 'No rows are displayed by default when no input is provided.');
 
-    $this->drupalGet('test_exposed_form_buttons', array('query' => array('type' => 'article')));
+    $this->drupalGet('test_exposed_form_buttons', ['query' => ['type' => 'article']]);
 
     // Ensure that results are displayed.
     $rows = $this->xpath("//div[contains(@class, 'views-row')]");
@@ -330,7 +330,7 @@ public function testTextInputRequired() {
 
     // Ensure that the "on demand text" is not displayed when an exposed filter
     // is applied.
-    $this->drupalGet('test_exposed_form_buttons', array('query' => array('type' => 'article')));
+    $this->drupalGet('test_exposed_form_buttons', ['query' => ['type' => 'article']]);
     $this->assertNoText($on_demand_text);
   }
 
@@ -411,7 +411,7 @@ public function testFormErrorWithExposedForm() {
     $this->assertRaw(t('Apply'), 'Ensure the exposed form is rendered before submitting the normal form.');
     $this->assertRaw('<div class="views-row">', 'Views result shown.');
 
-    $this->drupalPostForm(NULL, array(), t('Submit'));
+    $this->drupalPostForm(NULL, [], t('Submit'));
     $this->assertResponse(200);
     $form = $this->cssSelect('form.views-exposed-form');
     $this->assertTrue($form, 'The exposed form element was found.');
diff --git a/core/modules/views/src/Tests/Plugin/FilterTest.php b/core/modules/views/src/Tests/Plugin/FilterTest.php
index 1b2cf222b59bbe750b8876bbc6a880abe557df91..081835f404c9abc5b9e8691150b49d279d577473 100644
--- a/core/modules/views/src/Tests/Plugin/FilterTest.php
+++ b/core/modules/views/src/Tests/Plugin/FilterTest.php
@@ -18,21 +18,21 @@ class FilterTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_filter', 'test_filter_in_operator_ui');
+  public static $testViews = ['test_filter', 'test_filter_in_operator_ui'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'node');
+  public static $modules = ['views_ui', 'node'];
 
   protected function setUp() {
     parent::setUp();
 
     $this->enableViewsTestModule();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer views'));
+    $this->adminUser = $this->drupalCreateUser(['administer views']);
     $this->drupalLogin($this->adminUser);
     $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
     $this->drupalCreateContentType(['type' => 'page', 'name' => 'Page']);
@@ -60,16 +60,16 @@ public function testFilterQuery() {
     $view->initDisplay();
 
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'test_filter' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'test_filter' => [
         'id' => 'test_filter',
         'table' => 'views_test_data',
         'field' => 'name',
         'operator' => '=',
         'value' => 'John',
         'group' => 0,
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
@@ -90,23 +90,23 @@ public function testFilterQuery() {
 
     // Check that we have a single element, as a result of applying the '= John'
     // filter.
-    $this->assertEqual(count($view->result), 1, format_string('Results were returned. @count results.', array('@count' => count($view->result))));
+    $this->assertEqual(count($view->result), 1, format_string('Results were returned. @count results.', ['@count' => count($view->result)]));
 
     $view->destroy();
 
     $view->initDisplay();
 
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'test_filter' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'test_filter' => [
         'id' => 'test_filter',
         'table' => 'views_test_data',
         'field' => 'name',
         'operator' => '<>',
         'value' => 'John',
         'group' => 0,
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
@@ -116,15 +116,15 @@ public function testFilterQuery() {
 
     // Check if we have the other elements in the dataset, as a result of
     // applying the '<> John' filter.
-    $this->assertEqual(count($view->result), 4, format_string('Results were returned. @count results.', array('@count' => count($view->result))));
+    $this->assertEqual(count($view->result), 4, format_string('Results were returned. @count results.', ['@count' => count($view->result)]));
 
     $view->destroy();
     $view->initDisplay();
 
     // Set the test_enable option to FALSE. The 'where' clause should not be
     // added to the query.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'test_filter' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'test_filter' => [
         'id' => 'test_filter',
         'table' => 'views_test_data',
         'field' => 'name',
@@ -133,14 +133,14 @@ public function testFilterQuery() {
         'group' => 0,
         // Disable this option, so nothing should be added to the query.
         'test_enable' => FALSE,
-      ),
-    ));
+      ],
+    ]);
 
     // Execute the view again.
     $this->executeView($view);
 
     // Check if we have all 5 results.
-    $this->assertEqual(count($view->result), 5, format_string('All @count results returned', array('@count' => count($view->displayHandlers))));
+    $this->assertEqual(count($view->result), 5, format_string('All @count results returned', ['@count' => count($view->displayHandlers)]));
   }
 
   /**
diff --git a/core/modules/views/src/Tests/Plugin/MiniPagerTest.php b/core/modules/views/src/Tests/Plugin/MiniPagerTest.php
index 1a73b6980889e2decba95821eecd780ae53f638d..7e9f57a3050b7b8121dc9bfc869b38f93266d0a9 100644
--- a/core/modules/views/src/Tests/Plugin/MiniPagerTest.php
+++ b/core/modules/views/src/Tests/Plugin/MiniPagerTest.php
@@ -17,14 +17,14 @@ class MiniPagerTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_mini_pager');
+  public static $testViews = ['test_mini_pager'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   /**
    * Nodes used by the test.
@@ -36,7 +36,7 @@ class MiniPagerTest extends PluginTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     // Create a bunch of test nodes.
     for ($i = 0; $i < 20; $i++) {
       $this->nodes[] = $this->drupalCreateNode();
@@ -55,7 +55,7 @@ public function testMiniPagerRender() {
     $this->assertText($this->nodes[1]->label());
     $this->assertText($this->nodes[2]->label());
 
-    $this->drupalGet('test_mini_pager', array('query' => array('page' => 1)));
+    $this->drupalGet('test_mini_pager', ['query' => ['page' => 1]]);
     $this->assertText('‹‹ test', 'The previous link appears.');
     $this->assertText('Page 2', 'The current page info shows the second page.');
     $this->assertText('›› test', 'The next link appears.');
@@ -63,7 +63,7 @@ public function testMiniPagerRender() {
     $this->assertText($this->nodes[4]->label());
     $this->assertText($this->nodes[5]->label());
 
-    $this->drupalGet('test_mini_pager', array('query' => array('page' => 6)));
+    $this->drupalGet('test_mini_pager', ['query' => ['page' => 6]]);
     $this->assertNoText('›› test', 'The next link appears on the last page.');
     $this->assertText('Page 7', 'The current page info shows the last page.');
     $this->assertText('‹‹ test', 'The previous link does not appear on the last page.');
@@ -77,9 +77,9 @@ public function testMiniPagerRender() {
     $this->assertIdentical($view->get_total_rows, TRUE, 'The query was set to calculate the total number of rows.');
     $this->assertEqual(count($this->nodes), $view->total_rows, 'The total row count is equal to the number of nodes.');
 
-    $this->drupalGet('test_mini_pager_total', array('query' => array('page' => 1)));
+    $this->drupalGet('test_mini_pager_total', ['query' => ['page' => 1]]);
     $this->assertText('of ' . count($this->nodes), 'The first page shows the total row count.');
-    $this->drupalGet('test_mini_pager_total', array('query' => array('page' => 6)));
+    $this->drupalGet('test_mini_pager_total', ['query' => ['page' => 6]]);
     $this->assertText('of ' . count($this->nodes), 'The last page shows the total row count.');
 
     // Test a mini pager with just one item per page.
@@ -88,13 +88,13 @@ public function testMiniPagerRender() {
     $this->assertText('Page 1');
     $this->assertText($this->nodes[0]->label());
 
-    $this->drupalGet('test_mini_pager_one', array('query' => array('page' => 1)));
+    $this->drupalGet('test_mini_pager_one', ['query' => ['page' => 1]]);
     $this->assertText('‹‹');
     $this->assertText('Page 2');
     $this->assertText('››');
     $this->assertText($this->nodes[1]->label());
 
-    $this->drupalGet('test_mini_pager_one', array('query' => array('page' => 19)));
+    $this->drupalGet('test_mini_pager_one', ['query' => ['page' => 19]]);
     $this->assertNoText('››');
     $this->assertText('Page 20');
     $this->assertText('‹‹');
diff --git a/core/modules/views/src/Tests/Plugin/NumericFormatPluralTest.php b/core/modules/views/src/Tests/Plugin/NumericFormatPluralTest.php
index bb0632875c6c068eaa39aae19b447d091ca757f8..79f1922a922f177b9657ce0d3c1dc2b6f4b68d80 100644
--- a/core/modules/views/src/Tests/Plugin/NumericFormatPluralTest.php
+++ b/core/modules/views/src/Tests/Plugin/NumericFormatPluralTest.php
@@ -18,14 +18,14 @@ class NumericFormatPluralTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'file', 'language', 'locale');
+  public static $modules = ['views_ui', 'file', 'language', 'locale'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('numeric_test');
+  public static $testViews = ['numeric_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -59,7 +59,7 @@ function testNumericFormatPlural() {
     // Assert that changing the settings will change configuration properly.
     $edit = ['options[format_plural_values][0]' => '1 time', 'options[format_plural_values][1]' => '@count times'];
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $config = $this->config('views.view.numeric_test');
     $field_config_prefix = 'display.default.display_options.fields.count.';
@@ -103,7 +103,7 @@ function testNumericFormatPlural() {
       'options[format_plural_values][3]' => '@count time3',
     ];
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $config = $this->config('views.view.numeric_test');
     $field_config_prefix = 'display.default.display_options.fields.count.';
     $this->assertEqual($config->get($field_config_prefix . 'format_plural'), TRUE);
diff --git a/core/modules/views/src/Tests/Plugin/PagerTest.php b/core/modules/views/src/Tests/Plugin/PagerTest.php
index f922748e4d2b2079eeec6c9d81be024ab6db90d5..907fef2a5690095c9dd1d7c9795cb58559e98ca2 100644
--- a/core/modules/views/src/Tests/Plugin/PagerTest.php
+++ b/core/modules/views/src/Tests/Plugin/PagerTest.php
@@ -20,14 +20,14 @@ class PagerTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_store_pager_settings', 'test_pager_none', 'test_pager_some', 'test_pager_full', 'test_view_pager_full_zero_items_per_page', 'test_view', 'content');
+  public static $testViews = ['test_store_pager_settings', 'test_pager_none', 'test_pager_some', 'test_pager_full', 'test_view_pager_full_zero_items_per_page', 'test_view', 'content'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'views_ui');
+  public static $modules = ['node', 'views_ui'];
 
   /**
    * String translation storage object.
@@ -45,27 +45,27 @@ public function testStorePagerSettings() {
     // Show the master display so the override selection is shown.
     \Drupal::configFactory()->getEditable('views.settings')->set('ui.show.master_display', TRUE)->save();
 
-    $admin_user = $this->drupalCreateUser(array('administer views', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer views', 'administer site configuration']);
     $this->drupalLogin($admin_user);
     // Test behavior described in
     //   https://www.drupal.org/node/652712#comment-2354918.
 
     $this->drupalGet('admin/structure/views/view/test_view/edit');
 
-    $edit = array(
+    $edit = [
       'pager[type]' => 'full',
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/pager', $edit, t('Apply'));
-    $edit = array(
+    $edit = [
       'pager_options[items_per_page]' => 20,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/pager_options', $edit, t('Apply'));
     $this->assertText('20 items');
 
     // Change type and check whether the type is new type is stored.
-    $edit = array(
+    $edit = [
       'pager[type]' => 'mini',
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/pager', $edit, t('Apply'));
     $this->drupalGet('admin/structure/views/view/test_view/edit');
     $this->assertText('Mini', 'Changed pager plugin, should change some text');
@@ -78,38 +78,38 @@ public function testStorePagerSettings() {
 
     $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit');
 
-    $edit = array(
+    $edit = [
       'pager[type]' => 'full',
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/default/pager', $edit, t('Apply'));
     $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit');
     $this->assertText('Full');
 
-    $edit = array(
+    $edit = [
       'pager_options[items_per_page]' => 20,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/default/pager_options', $edit, t('Apply'));
     $this->assertText('20 items');
 
     // add new display and test the settings again, by override it.
-    $edit = array( );
+    $edit = [ ];
     // Add a display and override the pager settings.
     $this->drupalPostForm('admin/structure/views/view/test_store_pager_settings/edit', $edit, t('Add Page'));
-    $edit = array(
+    $edit = [
       'override[dropdown]' => 'page_1',
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager', $edit, t('Apply'));
 
-    $edit = array(
+    $edit = [
       'pager[type]' => 'mini',
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/page_1/pager', $edit, t('Apply'));
     $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit/page_1');
     $this->assertText('Mini', 'Changed pager plugin, should change some text');
 
-    $edit = array(
+    $edit = [
       'pager_options[items_per_page]' => 10,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_store_pager_settings/default/pager_options', $edit, t('Apply'));
     $this->assertText('10 items', 'The default value has been changed.');
     $this->drupalGet('admin/structure/views/view/test_store_pager_settings/edit/page_1');
@@ -128,7 +128,7 @@ public function testStorePagerSettings() {
   public function testNoLimit() {
     // Create 11 nodes and make sure that everyone is returned.
     // We create 11 nodes, because the default pager plugin had 10 items per page.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 11; $i++) {
       $this->drupalCreateNode();
     }
@@ -139,12 +139,12 @@ public function testNoLimit() {
     // Setup and test a offset.
     $view = Views::getView('test_pager_none');
     $view->setDisplay();
-    $pager = array(
+    $pager = [
       'type' => 'none',
-      'options' => array(
+      'options' => [
         'offset' => 3,
-      ),
-    );
+      ],
+    ];
     $view->display_handler->setOption('pager', $pager);
     $this->executeView($view);
 
@@ -157,7 +157,7 @@ public function testNoLimit() {
   }
 
   public function testViewTotalRowsWithoutPager() {
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 23; $i++) {
       $this->drupalCreateNode();
     }
@@ -175,7 +175,7 @@ public function testViewTotalRowsWithoutPager() {
   public function testLimit() {
     // Create 11 nodes and make sure that everyone is returned.
     // We create 11 nodes, because the default pager plugin had 10 items per page.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 11; $i++) {
       $this->drupalCreateNode();
     }
@@ -187,13 +187,13 @@ public function testLimit() {
     // Setup and test a offset.
     $view = Views::getView('test_pager_some');
     $view->setDisplay();
-    $pager = array(
+    $pager = [
       'type' => 'none',
-      'options' => array(
+      'options' => [
         'offset' => 8,
         'items_per_page' => 5,
-      ),
-    );
+      ],
+    ];
     $view->display_handler->setOption('pager', $pager);
     $this->executeView($view);
     $this->assertEqual(count($view->result), 3, 'Make sure that only a certain count of items is returned');
@@ -209,7 +209,7 @@ public function testLimit() {
   public function testNormalPager() {
     // Create 11 nodes and make sure that everyone is returned.
     // We create 11 nodes, because the default pager plugin had 10 items per page.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 11; $i++) {
       $this->drupalCreateNode();
     }
@@ -221,13 +221,13 @@ public function testNormalPager() {
     // Setup and test a offset.
     $view = Views::getView('test_pager_full');
     $view->setDisplay();
-    $pager = array(
+    $pager = [
       'type' => 'full',
-      'options' => array(
+      'options' => [
         'offset' => 8,
         'items_per_page' => 5,
-      ),
-    );
+      ],
+    ];
     $view->display_handler->setOption('pager', $pager);
     $this->executeView($view);
     $this->assertEqual(count($view->result), 3, 'Make sure that only a certain count of items is returned');
@@ -244,13 +244,13 @@ public function testNormalPager() {
     // Setup and test a offset.
     $view = Views::getView('test_pager_full');
     $view->setDisplay();
-    $pager = array(
+    $pager = [
       'type' => 'full',
-      'options' => array(
+      'options' => [
         'offset' => 0,
         'items_per_page' => 0,
-      ),
-    );
+      ],
+    ];
 
     $view->display_handler->setOption('pager', $pager);
     $this->executeView($view);
@@ -268,7 +268,7 @@ public function testNormalPager() {
   public function testRenderNullPager() {
     // Create 11 nodes and make sure that everyone is returned.
     // We create 11 nodes, because the default pager plugin had 10 items per page.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 11; $i++) {
       $this->drupalCreateNode();
     }
@@ -348,10 +348,10 @@ public function testPagerConfigTranslation() {
     $view->save();
 
     // Enable locale, config_translation and language module.
-    $this->container->get('module_installer')->install(array('locale', 'language', 'config_translation'));
+    $this->container->get('module_installer')->install(['locale', 'language', 'config_translation']);
     $this->resetAll();
 
-    $admin_user = $this->drupalCreateUser(array('access content overview', 'administer nodes', 'bypass node access', 'translate configuration'));
+    $admin_user = $this->drupalCreateUser(['access content overview', 'administer nodes', 'bypass node access', 'translate configuration']);
     $this->drupalLogin($admin_user);
 
     $langcode = 'nl';
@@ -362,29 +362,29 @@ public function testPagerConfigTranslation() {
     // Add Dutch language programmatically.
     ConfigurableLanguage::createFromLangcode($langcode)->save();
 
-    $edit = array(
+    $edit = [
       'translation[config_names][views.view.content][display][default][display_options][pager][options][tags][first]' => '« Eerste',
       'translation[config_names][views.view.content][display][default][display_options][pager][options][tags][previous]' => '‹ Vorige',
       'translation[config_names][views.view.content][display][default][display_options][pager][options][tags][next]' => 'Volgende ›',
       'translation[config_names][views.view.content][display][default][display_options][pager][options][tags][last]' => 'Laatste »',
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/view/content/translate/nl/edit', $edit, t('Save translation'));
 
     // We create 11 nodes, this will give us 3 pages.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 11; $i++) {
       $this->drupalCreateNode();
     }
 
     // Go to the second page so we see both previous and next buttons.
-    $this->drupalGet('nl/admin/content', array('query' => array('page' => 1)));
+    $this->drupalGet('nl/admin/content', ['query' => ['page' => 1]]);
     // Translation mapping..
-    $labels = array(
+    $labels = [
       '« First' => '« Eerste',
       '‹ Previous' => '‹ Vorige',
       'Next ›' => 'Volgende ›',
       'Last »' => 'Laatste »',
-    );
+    ];
     foreach ($labels as $label => $translation) {
       // Check if we can find the translation.
       $this->assertRaw($translation);
@@ -396,7 +396,7 @@ public function testPagerConfigTranslation() {
    */
   public function testPagerLocale() {
     // Enable locale and language module.
-    $this->container->get('module_installer')->install(array('locale', 'language'));
+    $this->container->get('module_installer')->install(['locale', 'language']);
     $this->resetAll();
     $langcode = 'nl';
 
@@ -407,31 +407,31 @@ public function testPagerLocale() {
     ConfigurableLanguage::createFromLangcode($langcode)->save();
 
     // Labels that need translations.
-    $labels = array(
+    $labels = [
       '« First' => '« Eerste',
       '‹ Previous' => '‹ Vorige',
       'Next ›' => 'Volgende ›',
       'Last »' => 'Laatste »',
-    );
+    ];
     foreach ($labels as $label => $translation) {
       // Create source string.
       $source = $this->localeStorage->createString(
-        array(
+        [
           'source' => $label
-        )
+        ]
       );
       $source->save();
       $this->createTranslation($source, $translation, $langcode);
     }
 
     // We create 11 nodes, this will give us 3 pages.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 11; $i++) {
       $this->drupalCreateNode();
     }
 
     // Go to the second page so we see both previous and next buttons.
-    $this->drupalGet('nl/test_pager_full', array('query' => array('page' => 1)));
+    $this->drupalGet('nl/test_pager_full', ['query' => ['page' => 1]]);
     foreach ($labels as $label => $translation) {
       // Check if we can find the translation.
       $this->assertRaw($translation);
@@ -442,11 +442,11 @@ public function testPagerLocale() {
    * Creates single translation for source string.
    */
   protected function createTranslation($source, $translation, $langcode) {
-    $values = array(
+    $values = [
       'lid' => $source->lid,
       'language' => $langcode,
       'translation' => $translation,
-    );
+    ];
     return $this->localeStorage->createTranslation($values)->save();
   }
 
diff --git a/core/modules/views/src/Tests/Plugin/StyleGridTest.php b/core/modules/views/src/Tests/Plugin/StyleGridTest.php
index 49bf67d4392f9f937306396a27de1088166f487d..3b8989cbdb0fbcf5a23df81ba45cca66ee5cc6f7 100644
--- a/core/modules/views/src/Tests/Plugin/StyleGridTest.php
+++ b/core/modules/views/src/Tests/Plugin/StyleGridTest.php
@@ -18,12 +18,12 @@ class StyleGridTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_grid');
+  public static $testViews = ['test_grid'];
 
   /**
    * Keeps track of which alignments have been tested.
    */
-  protected $alignmentsTested = array();
+  protected $alignmentsTested = [];
 
   /**
    * {@inheritdoc}
@@ -38,7 +38,7 @@ protected function setUp() {
    */
   public function testGrid() {
     $view = Views::getView('test_grid');
-    foreach (array('horizontal', 'vertical') as $alignment) {
+    foreach (['horizontal', 'vertical'] as $alignment) {
       $this->assertGrid($view, $alignment, 5);
       $this->assertGrid($view, $alignment, 4);
       $this->assertGrid($view, $alignment, 3);
@@ -73,7 +73,7 @@ protected function assertGrid(ViewExecutable $view, $alignment, $columns) {
     $output = \Drupal::service('renderer')->renderRoot($output);
     $this->setRawContent($output);
     if (!in_array($alignment, $this->alignmentsTested)) {
-      $result = $this->xpath('//div[contains(@class, "views-view-grid") and contains(@class, :alignment) and contains(@class, :columns)]', array(':alignment' => $alignment, ':columns' => 'cols-' . $columns));
+      $result = $this->xpath('//div[contains(@class, "views-view-grid") and contains(@class, :alignment) and contains(@class, :columns)]', [':alignment' => $alignment, ':columns' => 'cols-' . $columns]);
       $this->assertTrue(count($result), ucfirst($alignment) . " grid markup detected.");
       $this->alignmentsTested[] = $alignment;
     }
@@ -86,10 +86,10 @@ protected function assertGrid(ViewExecutable $view, $alignment, $columns) {
       case 1: $width = '100'; break;
     }
     // Ensure last column exists.
-    $result = $this->xpath('//div[contains(@class, "views-col") and contains(@class, :columns) and starts-with(@style, :width)]', array(':columns' => 'col-' . $columns, ':width' => 'width: ' . $width));
+    $result = $this->xpath('//div[contains(@class, "views-col") and contains(@class, :columns) and starts-with(@style, :width)]', [':columns' => 'col-' . $columns, ':width' => 'width: ' . $width]);
     $this->assertTrue(count($result), ucfirst($alignment) . " $columns column grid: last column exists and automatic width calculated correctly.");
     // Ensure no extra columns were generated.
-    $result = $this->xpath('//div[contains(@class, "views-col") and contains(@class, :columns)]', array(':columns' => 'col-' . ($columns + 1)));
+    $result = $this->xpath('//div[contains(@class, "views-col") and contains(@class, :columns)]', [':columns' => 'col-' . ($columns + 1)]);
     $this->assertFalse(count($result), ucfirst($alignment) . " $columns column grid: no extraneous columns exist.");
     // Ensure tokens are being replaced in custom row/column classes.
     $result = $this->xpath('//div[contains(@class, "views-col") and contains(@class, "name-John")]');
diff --git a/core/modules/views/src/Tests/Plugin/StyleOpmlTest.php b/core/modules/views/src/Tests/Plugin/StyleOpmlTest.php
index 1b4a53de956529893c9e85837bc8dd6b2b9b91f3..4e84433dca17d2a84d6330664003eeede3bd30ab 100644
--- a/core/modules/views/src/Tests/Plugin/StyleOpmlTest.php
+++ b/core/modules/views/src/Tests/Plugin/StyleOpmlTest.php
@@ -15,14 +15,14 @@ class StyleOpmlTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_style_opml');
+  public static $testViews = ['test_style_opml'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('aggregator');
+  public static $modules = ['aggregator'];
 
   /**
    * {@inheritdoc}
@@ -32,7 +32,7 @@ protected function setUp() {
 
     $this->enableViewsTestModule();
 
-    $admin_user = $this->drupalCreateUser(array('administer news feeds'));
+    $admin_user = $this->drupalCreateUser(['administer news feeds']);
     $this->drupalLogin($admin_user);
   }
 
@@ -41,11 +41,11 @@ protected function setUp() {
    */
   public function testOpmlOutput() {
     // Create a test feed.
-    $values = array(
+    $values = [
       'title' => $this->randomMachineName(10),
       'url' => 'http://example.com/rss.xml',
       'refresh' => '900',
-    );
+    ];
     $feed = $this->container->get('entity.manager')
       ->getStorage('aggregator_feed')
       ->create($values);
diff --git a/core/modules/views/src/Tests/Plugin/StyleTableTest.php b/core/modules/views/src/Tests/Plugin/StyleTableTest.php
index 9a3f25ef94614dab6f85a78b905343fde3cfde6c..537839f7bf03d5cca2ab54968d5e2f2634f443b8 100644
--- a/core/modules/views/src/Tests/Plugin/StyleTableTest.php
+++ b/core/modules/views/src/Tests/Plugin/StyleTableTest.php
@@ -16,7 +16,7 @@ class StyleTableTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_table');
+  public static $testViews = ['test_table'];
 
   /**
    * {@inheritdoc}
@@ -115,13 +115,13 @@ public function testNumericFieldVisible() {
     $data_set = $this->dataSet();
     $query = db_insert('views_test_data')
       ->fields(array_keys($data_set[0]));
-    $query->values(array(
+    $query->values([
       'name' => 'James McCartney',
       'age' => 0,
       'job' => 'Baby',
       'created' => gmmktime(6, 30, 10, 1, 1, 2000),
       'status' => 1,
-    ));
+    ]);
     $query->execute();
 
     $this->drupalGet('test-table');
@@ -162,11 +162,11 @@ public function testGrouping() {
     // specific style options.
     $display = &$view->getDisplay('default');
     // Set job as the grouping field.
-    $display['display_options']['style']['options']['grouping'][0] = array(
+    $display['display_options']['style']['options']['grouping'][0] = [
       'field' => 'job',
       'rendered' => TRUE,
       'rendered_strip' => FALSE,
-    );
+    ];
     // Clear the caption text, the rendered job field will be used as a caption.
     $display['display_options']['style']['options']['caption'] = '';
     $display['display_options']['style']['options']['summary'] = '';
@@ -175,13 +175,13 @@ public function testGrouping() {
 
     // Add a record containing unsafe markup to be sure it's filtered out.
     $unsafe_markup = '<script>alert("Rapper");</script>';
-    $unsafe_markup_data = array(
+    $unsafe_markup_data = [
       'name' => 'Marshall',
       'age' => 42,
       'job' => $unsafe_markup,
       'created' => gmmktime(0, 0, 0, 2, 15, 2001),
       'status' => 1,
-    );
+    ];
     $database = $this->container->get('database');
     $database->insert('views_test_data')
       ->fields(array_keys($unsafe_markup_data))
@@ -189,13 +189,13 @@ public function testGrouping() {
       ->execute();
 
     $this->drupalGet('test-table');
-    $expected_captions = array(
+    $expected_captions = [
       'Job: Speaker',
       'Job: Songwriter',
       'Job: Drummer',
       'Job: Singer',
       'Job: ' . $unsafe_markup,
-    );
+    ];
 
     // Ensure that we don't find the caption containing unsafe markup.
     $this->assertNoRaw($unsafe_markup, "Didn't find caption containing unsafe markup.");
@@ -211,13 +211,13 @@ public function testGrouping() {
     $view->save();
 
     $this->drupalGet('test-table');
-    $expected_captions = array(
+    $expected_captions = [
       'Speaker',
       'Songwriter',
       'Drummer',
       'Singer',
       $unsafe_markup,
-    );
+    ];
 
     // Ensure that we don't find the caption containing unsafe markup.
     $this->assertNoRaw($unsafe_markup, "Didn't find caption containing unsafe markup.");
diff --git a/core/modules/views/src/Tests/Plugin/StyleTest.php b/core/modules/views/src/Tests/Plugin/StyleTest.php
index 6773c83cf77a906e0d2451abdfa58e24c6e56b7d..61798a6773bc9e55295003d34de61dc117a8aa5c 100644
--- a/core/modules/views/src/Tests/Plugin/StyleTest.php
+++ b/core/modules/views/src/Tests/Plugin/StyleTest.php
@@ -22,7 +22,7 @@ class StyleTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Stores the SimpleXML representation of the output.
@@ -100,52 +100,52 @@ function _testGrouping($stripped = FALSE) {
     $view->setDisplay();
     // Setup grouping by the job and the age field.
     $view->initStyle();
-    $view->style_plugin->options['grouping'] = array(
-      array('field' => 'job'),
-      array('field' => 'age'),
-    );
+    $view->style_plugin->options['grouping'] = [
+      ['field' => 'job'],
+      ['field' => 'age'],
+    ];
 
     // Reduce the amount of items to make the test a bit easier.
     // Set up the pager.
-    $view->displayHandlers->get('default')->overrideOption('pager', array(
+    $view->displayHandlers->get('default')->overrideOption('pager', [
       'type' => 'some',
-      'options' => array('items_per_page' => 3),
-    ));
+      'options' => ['items_per_page' => 3],
+    ]);
 
     // Add the job and age field.
-    $fields = array(
-      'name' => array(
+    $fields = [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'label' => 'Name',
-      ),
-      'job' => array(
+      ],
+      'job' => [
         'id' => 'job',
         'table' => 'views_test_data',
         'field' => 'job',
         'relationship' => 'none',
         'label' => 'Job',
-      ),
-      'age' => array(
+      ],
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'label' => 'Age',
-      ),
-    );
+      ],
+    ];
     $view->displayHandlers->get('default')->overrideOption('fields', $fields);
 
     // Now run the query and groupby the result.
     $this->executeView($view);
 
-    $expected = array();
-    $expected['Job: Singer'] = array();
+    $expected = [];
+    $expected['Job: Singer'] = [];
     $expected['Job: Singer']['group'] = 'Job: Singer';
     $expected['Job: Singer']['level'] = 0;
-    $expected['Job: Singer']['rows']['Age: 25'] = array();
+    $expected['Job: Singer']['rows']['Age: 25'] = [];
     $expected['Job: Singer']['rows']['Age: 25']['group'] = 'Age: 25';
     $expected['Job: Singer']['rows']['Age: 25']['level'] = 1;
     $expected['Job: Singer']['rows']['Age: 25']['rows'][0] = new ResultRow(['index' => 0]);
@@ -153,7 +153,7 @@ function _testGrouping($stripped = FALSE) {
     $expected['Job: Singer']['rows']['Age: 25']['rows'][0]->views_test_data_job = 'Singer';
     $expected['Job: Singer']['rows']['Age: 25']['rows'][0]->views_test_data_age = '25';
     $expected['Job: Singer']['rows']['Age: 25']['rows'][0]->views_test_data_id = '1';
-    $expected['Job: Singer']['rows']['Age: 27'] = array();
+    $expected['Job: Singer']['rows']['Age: 27'] = [];
     $expected['Job: Singer']['rows']['Age: 27']['group'] = 'Age: 27';
     $expected['Job: Singer']['rows']['Age: 27']['level'] = 1;
     $expected['Job: Singer']['rows']['Age: 27']['rows'][1] = new ResultRow(['index' => 1]);
@@ -161,10 +161,10 @@ function _testGrouping($stripped = FALSE) {
     $expected['Job: Singer']['rows']['Age: 27']['rows'][1]->views_test_data_job = 'Singer';
     $expected['Job: Singer']['rows']['Age: 27']['rows'][1]->views_test_data_age = '27';
     $expected['Job: Singer']['rows']['Age: 27']['rows'][1]->views_test_data_id = '2';
-    $expected['Job: Drummer'] = array();
+    $expected['Job: Drummer'] = [];
     $expected['Job: Drummer']['group'] = 'Job: Drummer';
     $expected['Job: Drummer']['level'] = 0;
-    $expected['Job: Drummer']['rows']['Age: 28'] = array();
+    $expected['Job: Drummer']['rows']['Age: 28'] = [];
     $expected['Job: Drummer']['rows']['Age: 28']['group'] = 'Age: 28';
     $expected['Job: Drummer']['rows']['Age: 28']['level'] = 1;
     $expected['Job: Drummer']['rows']['Age: 28']['rows'][2] = new ResultRow(['index' => 2]);
@@ -190,8 +190,8 @@ function _testGrouping($stripped = FALSE) {
       $expected['Job: Drummer']['rows']['Age: 28']['rows'][2]->views_test_data_job = 'Drummer' . $rand3;
       $expected['Job: Drummer']['group'] = 'Job: Drummer';
 
-      $view->style_plugin->options['grouping'][0] = array('field' => 'job', 'rendered' => TRUE, 'rendered_strip' => TRUE);
-      $view->style_plugin->options['grouping'][1] = array('field' => 'age', 'rendered' => TRUE, 'rendered_strip' => TRUE);
+      $view->style_plugin->options['grouping'][0] = ['field' => 'job', 'rendered' => TRUE, 'rendered_strip' => TRUE];
+      $view->style_plugin->options['grouping'][1] = ['field' => 'age', 'rendered' => TRUE, 'rendered_strip' => TRUE];
     }
 
 
@@ -226,10 +226,10 @@ function _testGrouping($stripped = FALSE) {
     $view->setDisplay();
     $view->initStyle();
     $view->displayHandlers->get('default')->overrideOption('fields', $fields);
-    $view->style_plugin->options['grouping'] = array(
-      array('field' => 'job'),
-      array('field' => 'age'),
-    );
+    $view->style_plugin->options['grouping'] = [
+      ['field' => 'job'],
+      ['field' => 'age'],
+    ];
 
     $this->executeView($view);
 
@@ -237,8 +237,8 @@ function _testGrouping($stripped = FALSE) {
       $view->result[0]->views_test_data_job .= $rand1;
       $view->result[1]->views_test_data_job .= $rand2;
       $view->result[2]->views_test_data_job .= $rand3;
-      $view->style_plugin->options['grouping'][0] = array('field' => 'job', 'rendered' => TRUE, 'rendered_strip' => TRUE);
-      $view->style_plugin->options['grouping'][1] = array('field' => 'age', 'rendered' => TRUE, 'rendered_strip' => TRUE);
+      $view->style_plugin->options['grouping'][0] = ['field' => 'job', 'rendered' => TRUE, 'rendered_strip' => TRUE];
+      $view->style_plugin->options['grouping'][1] = ['field' => 'age', 'rendered' => TRUE, 'rendered_strip' => TRUE];
     }
 
     $sets_new_rendered = $view->style_plugin->renderGrouping($view->result, $view->style_plugin->options['grouping'], TRUE);
diff --git a/core/modules/views/src/Tests/Plugin/ViewsBulkTest.php b/core/modules/views/src/Tests/Plugin/ViewsBulkTest.php
index fd988895349f9234cbefc978c5830657f1714001..d7df00a25ee2b3a34e14da9100d7e7f770115eef 100644
--- a/core/modules/views/src/Tests/Plugin/ViewsBulkTest.php
+++ b/core/modules/views/src/Tests/Plugin/ViewsBulkTest.php
@@ -23,7 +23,7 @@ class ViewsBulkTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'views');
+  public static $modules = ['node', 'views'];
 
   public function setUp() {
     parent::setUp();
diff --git a/core/modules/views/src/Tests/Plugin/ViewsFormTest.php b/core/modules/views/src/Tests/Plugin/ViewsFormTest.php
index 01f7a8cff098f939d1eb2aac7227baf92e0b52c6..a73018931795de247e9cc1da3fca0d5beb118686 100644
--- a/core/modules/views/src/Tests/Plugin/ViewsFormTest.php
+++ b/core/modules/views/src/Tests/Plugin/ViewsFormTest.php
@@ -16,7 +16,7 @@ class ViewsFormTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('action_bulk_test');
+  public static $modules = ['action_bulk_test'];
 
   /**
    * Tests the Views form wrapper.
diff --git a/core/modules/views/src/Tests/Plugin/ViewsSqlExceptionTest.php b/core/modules/views/src/Tests/Plugin/ViewsSqlExceptionTest.php
index 27504d2aa01350c4098a3621142977801d9769f8..d3c93de44721cc93e49c59e6cef12979cdc8c8f3 100644
--- a/core/modules/views/src/Tests/Plugin/ViewsSqlExceptionTest.php
+++ b/core/modules/views/src/Tests/Plugin/ViewsSqlExceptionTest.php
@@ -17,7 +17,7 @@ class ViewsSqlExceptionTest extends PluginTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_filter');
+  public static $testViews = ['test_filter'];
 
   /**
    * {@inheritdoc}
@@ -46,16 +46,16 @@ public function testSqlException() {
     $view->initDisplay();
 
     // Adding a filter that will result in an invalid query.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'test_filter' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'test_filter' => [
         'id' => 'test_exception_filter',
         'table' => 'views_test_data',
         'field' => 'name',
         'operator' => '=',
         'value' => 'John',
         'group' => 0,
-      ),
-    ));
+      ],
+    ]);
 
     try {
       $this->executeView($view);
diff --git a/core/modules/views/src/Tests/SearchIntegrationTest.php b/core/modules/views/src/Tests/SearchIntegrationTest.php
index e71e1594d50318ccc5f28fcd4a2e234298da742c..1b6ab8915961cbb056787891d38c8967bcd9a5a2 100644
--- a/core/modules/views/src/Tests/SearchIntegrationTest.php
+++ b/core/modules/views/src/Tests/SearchIntegrationTest.php
@@ -16,14 +16,14 @@ class SearchIntegrationTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'search');
+  public static $modules = ['node', 'search'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_search');
+  public static $testViews = ['test_search'];
 
   /**
    * Tests search integration.
@@ -36,7 +36,7 @@ public function testSearchIntegration() {
     // "sandwich", and one containing "cola is good with pizza". Make the
     // second node link to the first.
     $node['title'] = 'pizza';
-    $node['body'] = array(array('value' => 'pizza'));
+    $node['body'] = [['value' => 'pizza']];
     $node['type'] = $type->id();
     $this->drupalCreateNode($node);
 
@@ -44,11 +44,11 @@ public function testSearchIntegration() {
     $node_url = $this->getUrl();
 
     $node['title'] = 'sandwich';
-    $node['body'] = array(array('value' => 'sandwich with a <a href="' . $node_url . '">link to first node</a>'));
+    $node['body'] = [['value' => 'sandwich with a <a href="' . $node_url . '">link to first node</a>']];
     $this->drupalCreateNode($node);
 
     $node['title'] = 'cola';
-    $node['body'] = array(array('value' => 'cola is good with pizza'));
+    $node['body'] = [['value' => 'cola is good with pizza']];
     $node['type'] = $type->id();
     $this->drupalCreateNode($node);
 
@@ -141,8 +141,8 @@ public function testSearchIntegration() {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertOneLink($label) {
-    $links = $this->xpath('//a[normalize-space(text())=:label]', array(':label' => $label));
-    $message = SafeMarkup::format('Link with label %label found once.', array('%label' => $label));
+    $links = $this->xpath('//a[normalize-space(text())=:label]', [':label' => $label]);
+    $message = SafeMarkup::format('Link with label %label found once.', ['%label' => $label]);
     return $this->assert(isset($links[0]) && !isset($links[1]), $message);
   }
 
diff --git a/core/modules/views/src/Tests/SearchMultilingualTest.php b/core/modules/views/src/Tests/SearchMultilingualTest.php
index 3fdb8dbd2322c61226660b6c3a4c1e98e7b3ffc1..f53421917bc93af069ef8a67483eac8dd4673302 100644
--- a/core/modules/views/src/Tests/SearchMultilingualTest.php
+++ b/core/modules/views/src/Tests/SearchMultilingualTest.php
@@ -17,14 +17,14 @@ class SearchMultilingualTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'search', 'language', 'content_translation');
+  public static $modules = ['node', 'search', 'language', 'content_translation'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_search');
+  public static $testViews = ['test_search'];
 
   /**
    * Tests search with multilingual nodes.
@@ -32,7 +32,7 @@ class SearchMultilingualTest extends ViewTestBase {
   public function testMultilingualSearchFilter() {
     // Create a user with admin for languages, content, and content types, plus
     // the ability to access content and searches.
-    $user = $this->drupalCreateUser(array('administer nodes', 'administer content types', 'administer languages', 'administer content translation', 'access content', 'search content'));
+    $user = $this->drupalCreateUser(['administer nodes', 'administer content types', 'administer languages', 'administer content translation', 'access content', 'search content']);
     $this->drupalLogin($user);
 
     // Add Spanish language programmatically.
@@ -40,24 +40,24 @@ public function testMultilingualSearchFilter() {
 
     // Create a content type and make it translatable.
     $type = $this->drupalCreateContentType();
-    $edit = array(
+    $edit = [
       'language_configuration[language_alterable]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/types/manage/' . $type->id(), $edit, t('Save content type'));
-    $edit = array(
+    $edit = [
       'entity_types[node]' => TRUE,
       'settings[node][' . $type->id() . '][translatable]' => TRUE,
       'settings[node][' . $type->id() . '][fields][title]' => TRUE,
       'settings[node][' . $type->id() . '][fields][body]' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
     \Drupal::entityManager()->clearCachedDefinitions();
 
     // Add a node in English, with title "sandwich".
-    $values = array(
+    $values = [
       'title' => 'sandwich',
       'type' => $type->id(),
-    );
+    ];
     $node = $this->drupalCreateNode($values);
 
     // "Translate" this node into Spanish, with title "pizza".
diff --git a/core/modules/views/src/Tests/ViewAjaxTest.php b/core/modules/views/src/Tests/ViewAjaxTest.php
index c1705a5b332d36092f76a9de4ed70cbb0463f2f7..b8b2730e6edcbd1da848ffd01d46239e9924408e 100644
--- a/core/modules/views/src/Tests/ViewAjaxTest.php
+++ b/core/modules/views/src/Tests/ViewAjaxTest.php
@@ -17,7 +17,7 @@ class ViewAjaxTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_ajax_view');
+  public static $testViews = ['test_ajax_view'];
 
   protected function setUp() {
     parent::setUp();
@@ -38,14 +38,14 @@ public function testAjaxView() {
     $this->assertEqual($drupal_settings['views']['ajaxViews'][$view_entry]['view_name'], 'test_ajax_view', 'The view\'s ajaxViews array entry has the correct \'view_name\' key.');
     $this->assertEqual($drupal_settings['views']['ajaxViews'][$view_entry]['view_display_id'], 'page_1', 'The view\'s ajaxViews array entry has the correct \'view_display_id\' key.');
 
-    $data = array();
+    $data = [];
     $data['view_name'] = 'test_ajax_view';
     $data['view_display_id'] = 'test_ajax_view';
 
-    $post = array(
+    $post = [
       'view_name' => 'test_ajax_view',
       'view_display_id' => 'page_1',
-    );
+    ];
     $post += $this->getAjaxPageStatePostData();
     $response = $this->drupalPost('views/ajax', '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]);
     $data = Json::decode($response);
diff --git a/core/modules/views/src/Tests/ViewElementTest.php b/core/modules/views/src/Tests/ViewElementTest.php
index 2ec2e679adcc4a73f35321d87e85c27d5acdd483..ff11dc2c765d82131b43ff78a388e79cd1a7464a 100644
--- a/core/modules/views/src/Tests/ViewElementTest.php
+++ b/core/modules/views/src/Tests/ViewElementTest.php
@@ -16,7 +16,7 @@ class ViewElementTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view_embed');
+  public static $testViews = ['test_view_embed'];
 
   protected function setUp() {
     parent::setUp();
@@ -60,23 +60,23 @@ public function testViewElement() {
     $this->assertEqual(count($xpath), 5);
 
     // Add an argument and save the view.
-    $view->displayHandlers->get('default')->overrideOption('arguments', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('arguments', [
+      'age' => [
         'default_action' => 'ignore',
         'title' => '',
         'default_argument_type' => 'fixed',
-        'validate' => array(
+        'validate' => [
           'type' => 'none',
           'fail' => 'not found',
-        ),
+        ],
         'break_phrase' => FALSE,
         'not' => FALSE,
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'plugin_id' => 'numeric',
-      )
-    ));
+      ]
+    ]);
     $view->save();
 
     // Test the render array again.
@@ -129,23 +129,23 @@ public function testViewElementEmbed() {
     $this->assertEqual(count($xpath), 5);
 
     // Add an argument and save the view.
-    $view->displayHandlers->get('default')->overrideOption('arguments', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('arguments', [
+      'age' => [
         'default_action' => 'ignore',
         'title' => '',
         'default_argument_type' => 'fixed',
-        'validate' => array(
+        'validate' => [
           'type' => 'none',
           'fail' => 'not found',
-        ),
+        ],
         'break_phrase' => FALSE,
         'not' => FALSE,
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'plugin_id' => 'numeric',
-      )
-    ));
+      ]
+    ]);
     $view->save();
 
     // Test the render array again.
diff --git a/core/modules/views/src/Tests/ViewKernelTestBase.php b/core/modules/views/src/Tests/ViewKernelTestBase.php
index 3a5df3457ebe69cccc169f5a1fee44d71f16c789..b39bc7473ae7a81cfd7fd3de25bf9c72ee5343e2 100644
--- a/core/modules/views/src/Tests/ViewKernelTestBase.php
+++ b/core/modules/views/src/Tests/ViewKernelTestBase.php
@@ -26,7 +26,7 @@ abstract class ViewKernelTestBase extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'views', 'views_test_config', 'views_test_data', 'user');
+  public static $modules = ['system', 'views', 'views_test_config', 'views_test_data', 'user'];
 
   /**
    * {@inheritdoc}
@@ -39,11 +39,11 @@ abstract class ViewKernelTestBase extends KernelTestBase {
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
 
-    $this->installSchema('system', array('sequences'));
+    $this->installSchema('system', ['sequences']);
     $this->setUpFixtures();
 
     if ($import_test_views) {
-      ViewTestData::createTestViews(get_class($this), array('views_test_config'));
+      ViewTestData::createTestViews(get_class($this), ['views_test_config']);
     }
   }
 
@@ -56,13 +56,13 @@ protected function setUp($import_test_views = TRUE) {
   protected function setUpFixtures() {
     // First install the system module. Many Views have Page displays have menu
     // links, and for those to work, the system menus must already be present.
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
 
     // Define the schema and views data variable before enabling the test module.
     \Drupal::state()->set('views_test_data_schema', $this->schemaDefinition());
     \Drupal::state()->set('views_test_data_views_data', $this->viewsData());
 
-    $this->installConfig(array('views', 'views_test_config', 'views_test_data'));
+    $this->installConfig(['views', 'views_test_config', 'views_test_data']);
     foreach ($this->schemaDefinition() as $table => $schema) {
       $this->installSchema('views_test_data', $table);
     }
@@ -113,7 +113,7 @@ protected function orderResultSet($result_set, $column, $reverse = FALSE) {
    * @param array $args
    *   (optional) An array of the view arguments to use for the view.
    */
-  protected function executeView($view, array $args = array()) {
+  protected function executeView($view, array $args = []) {
     $view->setDisplay();
     $view->preExecute($args);
     $view->execute();
diff --git a/core/modules/views/src/Tests/ViewRenderTest.php b/core/modules/views/src/Tests/ViewRenderTest.php
index 4bde8b2798578e6a805189f0f5da3fb6799c75ce..0b3f0ee2577352f1434b29fca3f2b46f3cbacf78 100644
--- a/core/modules/views/src/Tests/ViewRenderTest.php
+++ b/core/modules/views/src/Tests/ViewRenderTest.php
@@ -16,7 +16,7 @@ class ViewRenderTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view_render');
+  public static $testViews = ['test_view_render'];
 
   protected function setUp() {
     parent::setUp();
diff --git a/core/modules/views/src/Tests/ViewResultAssertionTrait.php b/core/modules/views/src/Tests/ViewResultAssertionTrait.php
index de5a2aac46a2a13b4a25f72c6d61e8a3b147de93..00501f5f0d36a0ec58e7ba253b648960562fa389 100644
--- a/core/modules/views/src/Tests/ViewResultAssertionTrait.php
+++ b/core/modules/views/src/Tests/ViewResultAssertionTrait.php
@@ -30,7 +30,7 @@ trait ViewResultAssertionTrait {
    * @return bool
    *   TRUE if the assertion succeeded, or FALSE otherwise.
    */
-  protected function assertIdenticalResultset($view, $expected_result, $column_map = array(), $message = NULL) {
+  protected function assertIdenticalResultset($view, $expected_result, $column_map = [], $message = NULL) {
     return $this->assertIdenticalResultsetHelper($view, $expected_result, $column_map, 'assertIdentical', $message);
   }
 
@@ -53,7 +53,7 @@ protected function assertIdenticalResultset($view, $expected_result, $column_map
    * @return bool
    *   TRUE if the assertion succeeded, or FALSE otherwise.
    */
-  protected function assertNotIdenticalResultset($view, $expected_result, $column_map = array(), $message = NULL) {
+  protected function assertNotIdenticalResultset($view, $expected_result, $column_map = [], $message = NULL) {
     return $this->assertIdenticalResultsetHelper($view, $expected_result, $column_map, 'assertNotIdentical', $message);
   }
 
@@ -81,9 +81,9 @@ protected function assertNotIdenticalResultset($view, $expected_result, $column_
    */
   protected function assertIdenticalResultsetHelper($view, $expected_result, $column_map, $assert_method, $message = NULL) {
     // Convert $view->result to an array of arrays.
-    $result = array();
+    $result = [];
     foreach ($view->result as $key => $value) {
-      $row = array();
+      $row = [];
       foreach ($column_map as $view_column => $expected_column) {
         if (property_exists($value, $view_column)) {
           $row[$expected_column] = (string) $value->$view_column;
@@ -104,7 +104,7 @@ protected function assertIdenticalResultsetHelper($view, $expected_result, $colu
 
     // Remove the columns we don't need from the expected result.
     foreach ($expected_result as $key => $value) {
-      $row = array();
+      $row = [];
       foreach ($column_map as $expected_column) {
         // The comparison will be done on the string representation of the value.
         if (is_object($value)) {
@@ -136,10 +136,10 @@ protected function assertIdenticalResultsetHelper($view, $expected_result, $colu
     // Do the actual comparison.
     if (!isset($message)) {
       $not = (strpos($assert_method, 'Not') ? 'not' : '');
-      $message = format_string("Actual result <pre>\n@actual\n</pre> is $not identical to expected <pre>\n@expected\n</pre>", array(
+      $message = format_string("Actual result <pre>\n@actual\n</pre> is $not identical to expected <pre>\n@expected\n</pre>", [
         '@actual' => var_export($result, TRUE),
         '@expected' => var_export($expected_result, TRUE),
-      ));
+      ]);
     }
     return $this->$assert_method($result, $expected_result, $message);
   }
diff --git a/core/modules/views/src/Tests/ViewTestBase.php b/core/modules/views/src/Tests/ViewTestBase.php
index 6ce349467bc52ba0a3b91402ee484b9881ceb5de..c694a8626bc234da879d11c08c81e97f40acaf47 100644
--- a/core/modules/views/src/Tests/ViewTestBase.php
+++ b/core/modules/views/src/Tests/ViewTestBase.php
@@ -25,12 +25,12 @@ abstract class ViewTestBase extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('views', 'views_test_config');
+  public static $modules = ['views', 'views_test_config'];
 
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
     if ($import_test_views) {
-      ViewTestData::createTestViews(get_class($this), array('views_test_config'));
+      ViewTestData::createTestViews(get_class($this), ['views_test_config']);
     }
   }
 
@@ -45,7 +45,7 @@ protected function enableViewsTestModule() {
     \Drupal::state()->set('views_test_data_schema', $this->schemaDefinition());
     \Drupal::state()->set('views_test_data_views_data', $this->viewsData());
 
-    \Drupal::service('module_installer')->install(array('views_test_data'));
+    \Drupal::service('module_installer')->install(['views_test_data']);
     $this->resetAll();
     $this->rebuildContainer();
     $this->container->get('module_handler')->reload();
@@ -101,7 +101,7 @@ protected function orderResultSet($result_set, $column, $reverse = FALSE) {
    *   TRUE if the assertion was successful, or FALSE on failure.
    */
   protected function helperButtonHasLabel($id, $expected_label, $message = 'Label has the expected value: %label.') {
-    return $this->assertFieldById($id, $expected_label, t($message, array('%label' => $expected_label)));
+    return $this->assertFieldById($id, $expected_label, t($message, ['%label' => $expected_label]));
   }
 
   /**
@@ -112,7 +112,7 @@ protected function helperButtonHasLabel($id, $expected_label, $message = 'Label
    * @param array $args
    *   (optional) An array of the view arguments to use for the view.
    */
-  protected function executeView(ViewExecutable $view, $args = array()) {
+  protected function executeView(ViewExecutable $view, $args = []) {
     // A view does not really work outside of a request scope, due to many
     // dependencies like the current user.
     $view->setDisplay();
diff --git a/core/modules/views/src/Tests/ViewTestData.php b/core/modules/views/src/Tests/ViewTestData.php
index d54902d6a6e637cbaddc92dae4023cd979d2939c..7b9bc9ebe1d7fb1eaefa098ca01e8451dd9ef549 100644
--- a/core/modules/views/src/Tests/ViewTestData.php
+++ b/core/modules/views/src/Tests/ViewTestData.php
@@ -23,7 +23,7 @@ class ViewTestData {
    *   The module directories to look in for test views.
    */
   public static function createTestViews($class, array $modules) {
-    $views = array();
+    $views = [];
     while ($class) {
       if (property_exists($class, 'testViews')) {
         $views = array_merge($views, $class::$testViews);
@@ -60,57 +60,57 @@ public static function createTestViews($class, array $modules) {
    * Returns the schema definition.
    */
   public static function schemaDefinition() {
-    $schema['views_test_data'] = array(
+    $schema['views_test_data'] = [
       'description' => 'Basic test table for Views tests.',
-      'fields' => array(
-        'id' => array(
+      'fields' => [
+        'id' => [
           'type' => 'serial',
           'unsigned' => TRUE,
           'not null' => TRUE,
-        ),
-        'name' => array(
+        ],
+        'name' => [
           'description' => "A person's name",
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'age' => array(
+        ],
+        'age' => [
           'description' => "The person's age",
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
-          'default' => 0),
-        'job' => array(
+          'default' => 0],
+        'job' => [
           'description' => "The person's job",
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => 'Undefined',
-        ),
-        'created' => array(
+        ],
+        'created' => [
           'description' => "The creation date of this record",
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'status' => array(
+        ],
+        'status' => [
           'description' => "The status of this record",
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
           'default' => 0,
-        ),
-      ),
-      'primary key' => array('id'),
-      'unique keys' => array(
-        'name' => array('name')
-      ),
-      'indexes' => array(
-        'ages' => array('age'),
-      ),
-    );
+        ],
+      ],
+      'primary key' => ['id'],
+      'unique keys' => [
+        'name' => ['name']
+      ],
+      'indexes' => [
+        'ages' => ['age'],
+      ],
+    ];
     return $schema;
   }
 
@@ -119,109 +119,109 @@ public static function schemaDefinition() {
    */
   public static function viewsData() {
     // Declaration of the base table.
-    $data['views_test_data']['table'] = array(
+    $data['views_test_data']['table'] = [
       'group' => 'Views test',
-      'base' => array(
+      'base' => [
         'field' => 'id',
         'title' => 'Views test data',
         'help' => 'Users who have created accounts on your site.',
-      ),
-    );
+      ],
+    ];
 
     // Declaration of fields.
-    $data['views_test_data']['id'] = array(
+    $data['views_test_data']['id'] = [
       'title' => 'ID',
       'help' => 'The test data ID',
-      'field' => array(
+      'field' => [
         'id' => 'numeric',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'numeric',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'numeric',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['views_test_data']['name'] = array(
+      ],
+    ];
+    $data['views_test_data']['name'] = [
       'title' => 'Name',
       'help' => 'The name of the person',
-      'field' => array(
+      'field' => [
         'id' => 'standard',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'string',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'string',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['views_test_data']['age'] = array(
+      ],
+    ];
+    $data['views_test_data']['age'] = [
       'title' => 'Age',
       'help' => 'The age of the person',
-      'field' => array(
+      'field' => [
         'id' => 'numeric',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'numeric',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'numeric',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['views_test_data']['job'] = array(
+      ],
+    ];
+    $data['views_test_data']['job'] = [
       'title' => 'Job',
       'help' => 'The job of the person',
-      'field' => array(
+      'field' => [
         'id' => 'standard',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'string',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'string',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
-    $data['views_test_data']['created'] = array(
+      ],
+    ];
+    $data['views_test_data']['created'] = [
       'title' => 'Created',
       'help' => 'The creation date of this record',
-      'field' => array(
+      'field' => [
         'id' => 'date',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'id' => 'date',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'date',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'date',
-      ),
-    );
-    $data['views_test_data']['status'] = array(
+      ],
+    ];
+    $data['views_test_data']['status'] = [
       'title' => 'Status',
       'help' => 'The status of this record',
-      'field' => array(
+      'field' => [
         'id' => 'boolean',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'id' => 'boolean',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'id' => 'standard',
-      ),
-    );
+      ],
+    ];
     return $data;
   }
 
@@ -229,43 +229,43 @@ public static function viewsData() {
    * Returns a very simple test dataset.
    */
   public static function dataSet() {
-    return array(
-      array(
+    return [
+      [
         'name' => 'John',
         'age' => 25,
         'job' => 'Singer',
         'created' => gmmktime(0, 0, 0, 1, 1, 2000),
         'status' => 1,
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
         'age' => 27,
         'job' => 'Singer',
         'created' => gmmktime(0, 0, 0, 1, 2, 2000),
         'status' => 0,
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'age' => 28,
         'job' => 'Drummer',
         'created' => gmmktime(6, 30, 30, 1, 1, 2000),
         'status' => 1,
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
         'age' => 26,
         'job' => 'Songwriter',
         'created' => gmmktime(6, 0, 0, 1, 1, 2000),
         'status' => 0,
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
         'age' => 30,
         'job' => 'Speaker',
         'created' => gmmktime(6, 30, 10, 1, 1, 2000),
         'status' => 1,
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/modules/views/src/Tests/ViewsEscapingTest.php b/core/modules/views/src/Tests/ViewsEscapingTest.php
index 08892c0e2a7876cc643bf84ebb3946f15b10166c..1ec3a9f3d0e7f0233b610159bc2918a48960e081 100644
--- a/core/modules/views/src/Tests/ViewsEscapingTest.php
+++ b/core/modules/views/src/Tests/ViewsEscapingTest.php
@@ -14,7 +14,7 @@ class ViewsEscapingTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_page_display', 'test_field_header');
+  public static $testViews = ['test_page_display', 'test_field_header'];
 
   /**
    * Used by WebTestBase::setup()
@@ -25,7 +25,7 @@ class ViewsEscapingTest extends ViewTestBase {
    *
    * @see \Drupal\simpletest\WebTestBase::setup()
    */
-  public static $modules = array('views', 'theme_test');
+  public static $modules = ['views', 'theme_test'];
 
   /**
    * {@inheritdoc}
@@ -47,7 +47,7 @@ public function testViewsViewFieldsEscaping() {
     $this->assertNoEscaped('<');
 
     // Install theme to test with template system.
-    \Drupal::service('theme_handler')->install(array('views_test_theme'));
+    \Drupal::service('theme_handler')->install(['views_test_theme']);
 
     // Make base theme default then test for hook invocations.
     $this->config('system.theme')
diff --git a/core/modules/views/src/Tests/ViewsTemplateTest.php b/core/modules/views/src/Tests/ViewsTemplateTest.php
index 2d7b206da0607744a12c3ebf8013eb5ae0189bab..4a0690829609c82b5ec540960a7d31e2923e7428 100644
--- a/core/modules/views/src/Tests/ViewsTemplateTest.php
+++ b/core/modules/views/src/Tests/ViewsTemplateTest.php
@@ -17,7 +17,7 @@ class ViewsTemplateTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view_display_template');
+  public static $testViews = ['test_view_display_template'];
 
   /**
    * {@inheritdoc}
@@ -26,7 +26,7 @@ protected function setUp() {
     parent::setUp(FALSE);
 
     $this->enableViewsTestModule();
-    ViewTestData::createTestViews(get_class($this), array('views_test_config'));
+    ViewTestData::createTestViews(get_class($this), ['views_test_config']);
   }
 
   /**
diff --git a/core/modules/views/src/Tests/ViewsThemeIntegrationTest.php b/core/modules/views/src/Tests/ViewsThemeIntegrationTest.php
index 63e7e2ec6e2fb521e4da1600a469f901d0aa45a4..1fe836a82ec0f902276a114ab1e0d4768d0fdc0f 100644
--- a/core/modules/views/src/Tests/ViewsThemeIntegrationTest.php
+++ b/core/modules/views/src/Tests/ViewsThemeIntegrationTest.php
@@ -16,7 +16,7 @@ class ViewsThemeIntegrationTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_page_display');
+  public static $testViews = ['test_page_display'];
 
 
   /**
@@ -28,7 +28,7 @@ class ViewsThemeIntegrationTest extends ViewTestBase {
    *
    * @see \Drupal\simpletest\WebTestBase::setup()
    */
-  public static $modules = array('views', 'theme_test');
+  public static $modules = ['views', 'theme_test'];
 
   /**
    * {@inheritdoc}
@@ -45,7 +45,7 @@ protected function setUp() {
    */
   public function testThemedViewPage() {
 
-    \Drupal::service('theme_handler')->install(array('test_basetheme', 'test_subtheme'));
+    \Drupal::service('theme_handler')->install(['test_basetheme', 'test_subtheme']);
 
     // Make base theme default then test for hook invocations.
     $this->config('system.theme')
diff --git a/core/modules/views/src/Tests/Wizard/BasicTest.php b/core/modules/views/src/Tests/Wizard/BasicTest.php
index 00237d79a967d6f981b400693fc417cccbc45467..e63583227f80abdd99cebdb5cb9b6744b8befffe 100644
--- a/core/modules/views/src/Tests/Wizard/BasicTest.php
+++ b/core/modules/views/src/Tests/Wizard/BasicTest.php
@@ -21,15 +21,15 @@ protected function setUp() {
   }
 
   function testViewsWizardAndListing() {
-    $this->drupalCreateContentType(array('type' => 'article'));
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'article']);
+    $this->drupalCreateContentType(['type' => 'page']);
 
     // Check if we can access the main views admin page.
     $this->drupalGet('admin/structure/views');
     $this->assertText(t('Add view'));
 
     // Create a simple and not at all useful view.
-    $view1 = array();
+    $view1 = [];
     $view1['label'] = $this->randomMachineName(16);
     $view1['id'] = strtolower($this->randomMachineName(16));
     $view1['description'] = $this->randomMachineName(16);
@@ -51,11 +51,11 @@ function testViewsWizardAndListing() {
     $this->assertNoText($view1['label']);
 
     // Create two nodes.
-    $node1 = $this->drupalCreateNode(array('type' => 'page'));
-    $node2 = $this->drupalCreateNode(array('type' => 'article'));
+    $node1 = $this->drupalCreateNode(['type' => 'page']);
+    $node2 = $this->drupalCreateNode(['type' => 'article']);
 
     // Now create a page with simple node listing and an attached feed.
-    $view2 = array();
+    $view2 = [];
     $view2['label'] = $this->randomMachineName(16);
     $view2['id'] = strtolower($this->randomMachineName(16));
     $view2['description'] = $this->randomMachineName(16);
@@ -102,7 +102,7 @@ function testViewsWizardAndListing() {
     $this->assertNoText('View: ' . $view2['label']);
 
     // Create a view with a page and a block, and filter the listing.
-    $view3 = array();
+    $view3 = [];
     $view3['label'] = $this->randomMachineName(16);
     $view3['id'] = strtolower($this->randomMachineName(16));
     $view3['description'] = $this->randomMachineName(16);
@@ -150,7 +150,7 @@ function testViewsWizardAndListing() {
     $this->assertNoText('tracker', 'Default tracker view does not show on the listing page.');
 
     // Create a view with only a REST export.
-    $view4 = array();
+    $view4 = [];
     $view4['label'] = $this->randomMachineName(16);
     $view4['id'] = strtolower($this->randomMachineName(16));
     $view4['description'] = $this->randomMachineName(16);
@@ -159,7 +159,7 @@ function testViewsWizardAndListing() {
     $view4['rest_export[create]'] = 1;
     $view4['rest_export[path]'] = $this->randomMachineName(16);
     $this->drupalPostForm('admin/structure/views/add', $view4, t('Save and edit'));
-    $this->assertRaw(t('The view %view has been saved.', array('%view' => $view4['label'])));
+    $this->assertRaw(t('The view %view has been saved.', ['%view' => $view4['label']]));
 
     // Check that the REST export path works.
     $this->drupalGet($view4['rest_export[path]']);
@@ -178,7 +178,7 @@ function testViewsWizardAndListing() {
   public function testWizardDefaultValues() {
     $random_id = strtolower($this->randomMachineName(16));
     // Create a basic view.
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = $random_id;
     $view['description'] = $this->randomMachineName(16);
@@ -192,8 +192,8 @@ public function testWizardDefaultValues() {
     $displays = $view->storage->get('display');
 
     foreach ($displays as $display) {
-      foreach (array('query', 'exposed_form', 'pager', 'style', 'row') as $type) {
-        $this->assertFalse(empty($display['display_options'][$type]['options']), SafeMarkup::format('Default options found for @plugin.', array('@plugin' => $type)));
+      foreach (['query', 'exposed_form', 'pager', 'style', 'row'] as $type) {
+        $this->assertFalse(empty($display['display_options'][$type]['options']), SafeMarkup::format('Default options found for @plugin.', ['@plugin' => $type]));
       }
     }
   }
diff --git a/core/modules/views/src/Tests/Wizard/ItemsPerPageTest.php b/core/modules/views/src/Tests/Wizard/ItemsPerPageTest.php
index 7a2f430264968410787b3d49c15a8827de8dcb02..500eff2563d3bdbfde85a43a05c4f2fcd5403562 100644
--- a/core/modules/views/src/Tests/Wizard/ItemsPerPageTest.php
+++ b/core/modules/views/src/Tests/Wizard/ItemsPerPageTest.php
@@ -20,22 +20,22 @@ protected function setUp() {
    * Tests the number of items per page.
    */
   function testItemsPerPage() {
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
 
     // Create articles, each with a different creation time so that we can do a
     // meaningful sort.
-    $node1 = $this->drupalCreateNode(array('type' => 'article', 'created' => REQUEST_TIME));
-    $node2 = $this->drupalCreateNode(array('type' => 'article', 'created' => REQUEST_TIME + 1));
-    $node3 = $this->drupalCreateNode(array('type' => 'article', 'created' => REQUEST_TIME + 2));
-    $node4 = $this->drupalCreateNode(array('type' => 'article', 'created' => REQUEST_TIME + 3));
-    $node5 = $this->drupalCreateNode(array('type' => 'article', 'created' => REQUEST_TIME + 4));
+    $node1 = $this->drupalCreateNode(['type' => 'article', 'created' => REQUEST_TIME]);
+    $node2 = $this->drupalCreateNode(['type' => 'article', 'created' => REQUEST_TIME + 1]);
+    $node3 = $this->drupalCreateNode(['type' => 'article', 'created' => REQUEST_TIME + 2]);
+    $node4 = $this->drupalCreateNode(['type' => 'article', 'created' => REQUEST_TIME + 3]);
+    $node5 = $this->drupalCreateNode(['type' => 'article', 'created' => REQUEST_TIME + 4]);
 
     // Create a page. This should never appear in the view created below.
-    $page_node = $this->drupalCreateNode(array('type' => 'page', 'created' => REQUEST_TIME + 2));
+    $page_node = $this->drupalCreateNode(['type' => 'page', 'created' => REQUEST_TIME + 2]);
 
     // Create a view that sorts newest first, and shows 4 items in the page and
     // 3 in the block.
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['description'] = $this->randomMachineName(16);
diff --git a/core/modules/views/src/Tests/Wizard/MenuTest.php b/core/modules/views/src/Tests/Wizard/MenuTest.php
index 552ff507800a77b2210bdafd60ebcf84ed75e5b6..242065f245ef83b3b88c3d106ebecb81c27b2c18 100644
--- a/core/modules/views/src/Tests/Wizard/MenuTest.php
+++ b/core/modules/views/src/Tests/Wizard/MenuTest.php
@@ -19,7 +19,7 @@ function testMenus() {
     $this->drupalPlaceBlock('system_menu_block:main');
 
     // Create a view with a page display and a menu link in the Main Menu.
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['description'] = $this->randomMachineName(16);
@@ -44,9 +44,9 @@ function testMenus() {
     /** @var \Drupal\Core\Menu\MenuLinkInterface $link */
     $link = $menu_link_manager->createInstance('views_view:views.' . $view['id'] . '.page_1');
     $url = $link->getUrlObject();
-    $this->assertEqual($url->getRouteName(), 'view.' . $view['id'] . '.page_1', SafeMarkup::format('Found a link to %path in the main menu', array('%path' => $view['page[path]'])));
+    $this->assertEqual($url->getRouteName(), 'view.' . $view['id'] . '.page_1', SafeMarkup::format('Found a link to %path in the main menu', ['%path' => $view['page[path]']]));
     $metadata = $link->getMetaData();
-    $this->assertEqual(array('view_id' => $view['id'], 'display_id' => 'page_1'), $metadata);
+    $this->assertEqual(['view_id' => $view['id'], 'display_id' => 'page_1'], $metadata);
   }
 
 }
diff --git a/core/modules/views/src/Tests/Wizard/NodeWizardTest.php b/core/modules/views/src/Tests/Wizard/NodeWizardTest.php
index 14a1766ed348de12c8b89d9bf29d97347ff55f58..dd63efe373b2d71e461ee3ea4c1a6f339a2956da 100644
--- a/core/modules/views/src/Tests/Wizard/NodeWizardTest.php
+++ b/core/modules/views/src/Tests/Wizard/NodeWizardTest.php
@@ -15,9 +15,9 @@ class NodeWizardTest extends WizardTestBase {
    * Tests creating a view with node titles.
    */
   public function testViewAddWithNodeTitles() {
-    $this->drupalCreateContentType(array('type' => 'article'));
+    $this->drupalCreateContentType(['type' => 'article']);
 
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['description'] = $this->randomMachineName(16);
diff --git a/core/modules/views/src/Tests/Wizard/PagerTest.php b/core/modules/views/src/Tests/Wizard/PagerTest.php
index 1dfc21e56762f364197c822787abb2595cc99e6c..2ec6d555118fd2c3c6bf9076c870217af92aea2f 100644
--- a/core/modules/views/src/Tests/Wizard/PagerTest.php
+++ b/core/modules/views/src/Tests/Wizard/PagerTest.php
@@ -15,9 +15,9 @@ class PagerTest extends WizardTestBase {
   public function testPager() {
     // Create nodes, each with a different creation time so that we have
     // conditions that are meaningful for the use of a pager.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 12; $i++) {
-      $this->drupalCreateNode(array('created' => REQUEST_TIME - $i));
+      $this->drupalCreateNode(['created' => REQUEST_TIME - $i]);
     }
 
     // Make a View that uses a pager.
@@ -27,14 +27,14 @@ public function testPager() {
 
     // This technique for finding the existence of a pager
     // matches that used in Drupal\views_ui\Tests\PreviewTest.php.
-    $elements = $this->xpath('//ul[contains(@class, :class)]/li', array(':class' => 'pager__items'));
+    $elements = $this->xpath('//ul[contains(@class, :class)]/li', [':class' => 'pager__items']);
     $this->assertTrue(!empty($elements), 'Full pager found.');
 
     // Make a View that does not have a pager.
     $path_with_no_pager = 'test-view-without-pager';
     $this->createViewAtPath($path_with_no_pager, FALSE);
     $this->drupalGet($path_with_no_pager);
-    $elements = $this->xpath('//ul[contains(@class, :class)]/li', array(':class' => 'pager__items'));
+    $elements = $this->xpath('//ul[contains(@class, :class)]/li', [':class' => 'pager__items']);
     $this->assertTrue(empty($elements), 'Full pager not found.');
   }
 
@@ -47,7 +47,7 @@ public function testPager() {
    *   A boolean for whether the View created should use a pager.
    */
   protected function createViewAtPath($path, $pager = TRUE) {
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['show[sort]'] = 'node_field_data-created:ASC';
diff --git a/core/modules/views/src/Tests/Wizard/SortingTest.php b/core/modules/views/src/Tests/Wizard/SortingTest.php
index 61729306bc702de96d5b4955e6b77dd61415ec15..545c50db4a7a6ad8484cd38cc95c495bcb0eb58b 100644
--- a/core/modules/views/src/Tests/Wizard/SortingTest.php
+++ b/core/modules/views/src/Tests/Wizard/SortingTest.php
@@ -21,13 +21,13 @@ protected function setUp() {
   function testSorting() {
     // Create nodes, each with a different creation time so that we can do a
     // meaningful sort.
-    $this->drupalCreateContentType(array('type' => 'page'));
-    $node1 = $this->drupalCreateNode(array('created' => REQUEST_TIME));
-    $node2 = $this->drupalCreateNode(array('created' => REQUEST_TIME + 1));
-    $node3 = $this->drupalCreateNode(array('created' => REQUEST_TIME + 2));
+    $this->drupalCreateContentType(['type' => 'page']);
+    $node1 = $this->drupalCreateNode(['created' => REQUEST_TIME]);
+    $node2 = $this->drupalCreateNode(['created' => REQUEST_TIME + 1]);
+    $node3 = $this->drupalCreateNode(['created' => REQUEST_TIME + 2]);
 
     // Create a view that sorts oldest first.
-    $view1 = array();
+    $view1 = [];
     $view1['label'] = $this->randomMachineName(16);
     $view1['id'] = strtolower($this->randomMachineName(16));
     $view1['description'] = $this->randomMachineName(16);
@@ -52,7 +52,7 @@ function testSorting() {
     $this->assertTrue($pos1 < $pos2 && $pos2 < $pos3, 'The nodes appear in the expected order in a view that sorts by oldest first.');
 
     // Create a view that sorts newest first.
-    $view2 = array();
+    $view2 = [];
     $view2['label'] = $this->randomMachineName(16);
     $view2['id'] = strtolower($this->randomMachineName(16));
     $view2['description'] = $this->randomMachineName(16);
diff --git a/core/modules/views/src/Tests/Wizard/TaggedWithTest.php b/core/modules/views/src/Tests/Wizard/TaggedWithTest.php
index 939473f581cf0ceb958af3eabd29a5075d113fe1..d9299461993669290343900cffadeeec96f26444 100644
--- a/core/modules/views/src/Tests/Wizard/TaggedWithTest.php
+++ b/core/modules/views/src/Tests/Wizard/TaggedWithTest.php
@@ -21,7 +21,7 @@ class TaggedWithTest extends WizardTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * Node type with an autocomplete tagging field.
@@ -83,31 +83,31 @@ protected function setUp() {
     // Create the tag field itself.
     $this->tagFieldName = 'field_views_testing_tags';
 
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $this->tagVocabulary->id() => $this->tagVocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('node', $this->nodeTypeWithTags->id(), $this->tagFieldName, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
 
     entity_get_form_display('node', $this->nodeTypeWithTags->id(), 'default')
-      ->setComponent($this->tagFieldName, array(
+      ->setComponent($this->tagFieldName, [
         'type' => 'entity_reference_autocomplete_tags',
-      ))
+      ])
       ->save();
 
     entity_get_display('node', $this->nodeTypeWithTags->id(), 'default')
-      ->setComponent($this->tagFieldName, array(
+      ->setComponent($this->tagFieldName, [
         'type' => 'entity_reference_label',
         'weight' => 10,
-      ))
+      ])
       ->save();
     entity_get_display('node', $this->nodeTypeWithTags->id(), 'teaser')
-      ->setComponent('field_views_testing_tags', array(
+      ->setComponent('field_views_testing_tags', [
         'type' => 'entity_reference_label',
         'weight' => 10,
-      ))
+      ])
       ->save();
   }
 
@@ -120,21 +120,21 @@ function testTaggedWith() {
     $node_add_path = 'node/add/' . $this->nodeTypeWithTags->id();
 
     // Create three nodes, with different tags.
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $node_tag1_title = $this->randomMachineName();
     $edit[$this->tagFieldName . '[target_id]'] = 'tag1';
     $this->drupalPostForm($node_add_path, $edit, t('Save'));
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $node_tag1_tag2_title = $this->randomMachineName();
     $edit[$this->tagFieldName . '[target_id]'] = 'tag1, tag2';
     $this->drupalPostForm($node_add_path, $edit, t('Save'));
-    $edit = array();
+    $edit = [];
     $edit['title[0][value]'] = $node_no_tags_title = $this->randomMachineName();
     $this->drupalPostForm($node_add_path, $edit, t('Save'));
 
     // Create a view that filters by taxonomy term "tag1". It should show only
     // the two nodes from above that are tagged with "tag1".
-    $view1 = array();
+    $view1 = [];
     // First select the node type and update the form so the correct tag field
     // is used.
     $view1['show[type]'] = $this->nodeTypeWithTags->id();
@@ -158,7 +158,7 @@ function testTaggedWith() {
 
     // Create a view that filters by taxonomy term "tag2". It should show only
     // the one node from above that is tagged with "tag2".
-    $view2 = array();
+    $view2 = [];
     $view2['show[type]'] = $this->nodeTypeWithTags->id();
     $this->drupalPostForm('admin/structure/views/add', $view2, t('Update "of type" choice'));
     $this->assertResponse(200);
@@ -202,20 +202,20 @@ function testTaggedWithByNodeType() {
       'field_name' => $this->tagFieldName,
       'entity_type' => 'node',
       'bundle' => $this->nodeTypeWithoutTags->id(),
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
-        'handler_settings' => array(
-          'target_bundles' => array(
+        'handler_settings' => [
+          'target_bundles' => [
             $this->tagVocabulary->id() => $this->tagVocabulary->id(),
-          ),
+          ],
           'auto_create' => TRUE,
-        ),
-      ),
+        ],
+      ],
     ])->save();
     entity_get_form_display('node', $this->nodeTypeWithoutTags->id(), 'default')
-      ->setComponent($this->tagFieldName, array(
+      ->setComponent($this->tagFieldName, [
         'type' => 'entity_reference_autocomplete_tags',
-      ))
+      ])
       ->save();
 
     $view['show[type]'] = $this->nodeTypeWithTags->id();
diff --git a/core/modules/views/src/Tests/Wizard/WizardTestBase.php b/core/modules/views/src/Tests/Wizard/WizardTestBase.php
index e00b01827b821882252e0ba45386abeb4dfb4b0d..835b9f4edbecd091e492e689a6f247717883066d 100644
--- a/core/modules/views/src/Tests/Wizard/WizardTestBase.php
+++ b/core/modules/views/src/Tests/Wizard/WizardTestBase.php
@@ -14,13 +14,13 @@ abstract class WizardTestBase extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'views_ui', 'block', 'rest');
+  public static $modules = ['node', 'views_ui', 'block', 'rest'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create and log in a user with administer views permission.
-    $views_admin = $this->drupalCreateUser(array('administer views', 'administer blocks', 'bypass node access', 'access user profiles', 'view all revisions'));
+    $views_admin = $this->drupalCreateUser(['administer views', 'administer blocks', 'bypass node access', 'access user profiles', 'view all revisions']);
     $this->drupalLogin($views_admin);
     $this->drupalPlaceBlock('local_actions_block');
   }
diff --git a/core/modules/views/src/ViewExecutable.php b/core/modules/views/src/ViewExecutable.php
index 991f6c3d887b9e0a6188f73c57721a61c30e8cb8..b1861f7b367f39d17c63c8d2c09c9de06765aded 100644
--- a/core/modules/views/src/ViewExecutable.php
+++ b/core/modules/views/src/ViewExecutable.php
@@ -51,14 +51,14 @@ class ViewExecutable implements \Serializable {
    *
    * @var array
    */
-  public $args = array();
+  public $args = [];
 
   /**
    * An array of build info.
    *
    * @var array
    */
-  public $build_info = array();
+  public $build_info = [];
 
   /**
    * Whether this view uses AJAX.
@@ -74,7 +74,7 @@ class ViewExecutable implements \Serializable {
    *
    * @var \Drupal\views\ResultRow[]
    */
-  public $result = array();
+  public $result = [];
 
   // May be used to override the current pager info.
 
@@ -111,21 +111,21 @@ class ViewExecutable implements \Serializable {
    *
    * @var array()
    */
-  public $attachment_before = array();
+  public $attachment_before = [];
 
   /**
    * Attachments to place after the view.
    *
    * @var array
    */
-  public $attachment_after = array();
+  public $attachment_after = [];
 
   /**
    * Feed icons attached to the view.
    *
    * @var array
    */
-  public $feedIcons = array();
+  public $feedIcons = [];
 
   // Exposed widget input
 
@@ -134,35 +134,35 @@ class ViewExecutable implements \Serializable {
    *
    * @var array
    */
-  public $exposed_data = array();
+  public $exposed_data = [];
 
   /**
    * An array of input values from exposed forms.
    *
    * @var array
    */
-  protected $exposed_input = array();
+  protected $exposed_input = [];
 
   /**
    * Exposed widget input directly from the $form_state->getValues().
    *
    * @var array
    */
-  public $exposed_raw_input = array();
+  public $exposed_raw_input = [];
 
   /**
    * Used to store views that were previously running if we recurse.
    *
    * @var \Drupal\views\ViewExecutable[]
    */
-  public $old_view = array();
+  public $old_view = [];
 
   /**
    * To avoid recursion in views embedded into areas.
    *
    * @var \Drupal\views\ViewExecutable[]
    */
-  public $parent_views = array();
+  public $parent_views = [];
 
   /**
    * Whether this view is an attachment to another view.
@@ -680,7 +680,7 @@ public function getExposedInput() {
 
       $this->exposed_input = \Drupal::request()->query->all();
       // unset items that are definitely not our input:
-      foreach (array('page', 'q') as $key) {
+      foreach (['page', 'q'] as $key) {
         if (isset($this->exposed_input[$key])) {
           unset($this->exposed_input[$key]);
         }
@@ -788,7 +788,7 @@ public function setDisplay($display_id = NULL) {
 
     // Ensure the requested display exists.
     if (!$this->displayHandlers->has($display_id)) {
-      debug(format_string('setDisplay() called with invalid display ID "@display".', array('@display' => $display_id)));
+      debug(format_string('setDisplay() called with invalid display ID "@display".', ['@display' => $display_id]));
       return FALSE;
     }
 
@@ -956,10 +956,10 @@ public function renderPager($exposed_input) {
    *   An array of base tables to be used by the view.
    */
   public function getBaseTables() {
-    $base_tables = array(
+    $base_tables = [
       $this->storage->get('base_table') => TRUE,
       '#global' => TRUE,
-    );
+    ];
 
     foreach ($this->display_handler->getHandlers('relationship') as $handler) {
       $base_tables[$handler->definition['base']] = TRUE;
@@ -1054,7 +1054,7 @@ protected function _buildArguments() {
 
     // build arguments.
     $position = -1;
-    $substitutions = array();
+    $substitutions = [];
     $status = TRUE;
 
     // Get the title.
@@ -1192,18 +1192,18 @@ public function build($display_id = NULL) {
 
     // Let modules modify the view just prior to building it.
     $module_handler = \Drupal::moduleHandler();
-    $module_handler->invokeAll('views_pre_build', array($this));
+    $module_handler->invokeAll('views_pre_build', [$this]);
 
     // Attempt to load from cache.
     // @todo Load a build_info from cache.
 
     $start = microtime(TRUE);
     // If that fails, let's build!
-    $this->build_info = array(
+    $this->build_info = [
       'query' => '',
       'count_query' => '',
-      'query_args' => array(),
-    );
+      'query_args' => [],
+    ];
 
     $this->initQuery();
 
@@ -1314,7 +1314,7 @@ public function build($display_id = NULL) {
     $this->attachDisplays();
 
     // Let modules modify the view just after building it.
-    $module_handler->invokeAll('views_post_build', array($this));
+    $module_handler->invokeAll('views_post_build', [$this]);
 
     return TRUE;
   }
@@ -1335,7 +1335,7 @@ public function _build($key) {
     foreach ($handlers as $id => $data) {
 
       if (!empty($handlers[$id]) && is_object($handlers[$id])) {
-        $multiple_exposed_input = array(0 => NULL);
+        $multiple_exposed_input = [0 => NULL];
         if ($handlers[$id]->multipleExposedInput()) {
           $multiple_exposed_input = $handlers[$id]->groupMultipleExposedInput($this->exposed_data);
         }
@@ -1391,7 +1391,7 @@ public function execute($display_id = NULL) {
 
     // Let modules modify the view just prior to executing it.
     $module_handler = \Drupal::moduleHandler();
-    $module_handler->invokeAll('views_pre_execute', array($this));
+    $module_handler->invokeAll('views_pre_execute', [$this]);
 
     // Check for already-cached results.
     /** @var \Drupal\views\Plugin\views\cache\CachePluginBase $cache */
@@ -1418,7 +1418,7 @@ public function execute($display_id = NULL) {
     }
 
     // Let modules modify the view just after executing it.
-    $module_handler->invokeAll('views_post_execute', array($this));
+    $module_handler->invokeAll('views_post_execute', [$this]);
 
     return $this->executed = TRUE;
   }
@@ -1494,7 +1494,7 @@ public function render($display_id = NULL) {
     $this->style_plugin->preRender($this->result);
 
     // Let each area handler have access to the result set.
-    $areas = array('header', 'footer');
+    $areas = ['header', 'footer'];
     // Only call preRender() on the empty handlers if the result is empty.
     if (empty($this->result)) {
       $areas[] = 'empty';
@@ -1506,7 +1506,7 @@ public function render($display_id = NULL) {
     }
 
     // Let modules modify the view just prior to rendering it.
-    $module_handler->invokeAll('views_pre_render', array($this));
+    $module_handler->invokeAll('views_pre_render', [$this]);
 
     // Let the themes play too, because pre render is a very themey thing.
     foreach ($themes as $theme_name) {
@@ -1523,7 +1523,7 @@ public function render($display_id = NULL) {
     $cache->postRender($this->display_handler->output);
 
     // Let modules modify the view output after it is rendered.
-    $module_handler->invokeAll('views_post_render', array($this, &$this->display_handler->output, $cache));
+    $module_handler->invokeAll('views_post_render', [$this, &$this->display_handler->output, $cache]);
 
     // Let the themes play too, because post render is a very themey thing.
     foreach ($themes as $theme_name) {
@@ -1570,7 +1570,7 @@ public function getCacheTags() {
    *   A renderable array with #type 'view' or NULL if the display ID was
    *   invalid.
    */
-  public function buildRenderable($display_id = NULL, $args = array(), $cache = TRUE) {
+  public function buildRenderable($display_id = NULL, $args = [], $cache = TRUE) {
     // @todo Extract that into a generic method.
     if (empty($this->current_display) || $this->current_display != $this->chooseDisplay($display_id)) {
       if (!$this->setDisplay($display_id)) {
@@ -1603,7 +1603,7 @@ public function buildRenderable($display_id = NULL, $args = array(), $cache = TR
    *   A renderable array containing the view output or NULL if the display ID
    *   of the view to be executed doesn't exist.
    */
-  public function executeDisplay($display_id = NULL, $args = array()) {
+  public function executeDisplay($display_id = NULL, $args = []) {
     if (empty($this->current_display) || $this->current_display != $this->chooseDisplay($display_id)) {
       if (!$this->setDisplay($display_id)) {
         return NULL;
@@ -1635,7 +1635,7 @@ public function executeDisplay($display_id = NULL, $args = array()) {
    *   A renderable array containing the view output or NULL if the display ID
    *   of the view to be executed doesn't exist.
    */
-  public function preview($display_id = NULL, $args = array()) {
+  public function preview($display_id = NULL, $args = []) {
     if (empty($this->current_display) || ((!empty($display_id)) && $this->current_display != $display_id)) {
       if (!$this->setDisplay($display_id)) {
         return FALSE;
@@ -1657,7 +1657,7 @@ public function preview($display_id = NULL, $args = array()) {
    * @param array $args
    *   An array of arguments from the URL that can be used by the view.
    */
-  public function preExecute($args = array()) {
+  public function preExecute($args = []) {
     $this->old_view[] = views_get_current_view();
     views_set_current_view($this);
     $display_id = $this->current_display;
@@ -1669,7 +1669,7 @@ public function preExecute($args = array()) {
     }
 
     // Let modules modify the view just prior to executing it.
-    \Drupal::moduleHandler()->invokeAll('views_pre_view', array($this, $display_id, &$this->args));
+    \Drupal::moduleHandler()->invokeAll('views_pre_view', [$this, $display_id, &$this->args]);
 
     // Allow hook_views_pre_view() to set the dom_id, then ensure it is set.
     $this->dom_id = !empty($this->dom_id) ? $this->dom_id : hash('sha256', $this->storage->id() . REQUEST_TIME . mt_rand());
@@ -1947,7 +1947,7 @@ public function getUrl($args = NULL, $display_id = NULL) {
       return $display_handler->getUrlInfo();
     }
 
-    $argument_keys = isset($this->argument) ? array_keys($this->argument) : array();
+    $argument_keys = isset($this->argument) ? array_keys($this->argument) : [];
     $id = current($argument_keys);
 
     /** @var \Drupal\Core\Url $url */
@@ -2084,7 +2084,7 @@ public function destroy() {
    *   errors.
    */
   public function validate() {
-    $errors = array();
+    $errors = [];
 
     $this->initDisplay();
     $current_display = $this->current_display;
@@ -2158,7 +2158,7 @@ public static function getPluginTypes($type = NULL) {
    * @return string
    *   The unique ID for this handler instance.
    */
-  public function addHandler($display_id, $type, $table, $field, $options = array(), $id = NULL) {
+  public function addHandler($display_id, $type, $table, $field, $options = [], $id = NULL) {
     $types = $this::getHandlerTypes();
     $this->setDisplay($display_id);
 
@@ -2172,11 +2172,11 @@ public function addHandler($display_id, $type, $table, $field, $options = array(
     // If the desired type is not found, use the original value directly.
     $handler_type = !empty($types[$type]['type']) ? $types[$type]['type'] : $type;
 
-    $fields[$id] = array(
+    $fields[$id] = [
       'id' => $id,
       'table' => $table,
       'field' => $field,
-    ) + $options;
+    ] + $options;
 
     if (isset($data['table']['entity type'])) {
       $fields[$id]['entity_type'] = $data['table']['entity type'];
@@ -2405,7 +2405,7 @@ public function mergeDefaults() {
    *   An array of theme hook suggestions.
    */
   public function buildThemeFunctions($hook) {
-    $themes = array();
+    $themes = [];
     $display = isset($this->display_handler) ? $this->display_handler->display : NULL;
     $id = $this->storage->id();
 
diff --git a/core/modules/views/src/Views.php b/core/modules/views/src/Views.php
index 5628d96a39b1679ca547fab89aa9e3309c5c4014..9962d38d574dd1d25aefc2eb84675f96f43349ca 100644
--- a/core/modules/views/src/Views.php
+++ b/core/modules/views/src/Views.php
@@ -26,7 +26,7 @@ class Views {
    *
    * @var array
    */
-  protected static $plugins = array(
+  protected static $plugins = [
     'access' => 'plugin',
     'area' => 'handler',
     'argument' => 'handler',
@@ -46,7 +46,7 @@ class Views {
     'sort' => 'handler',
     'style' => 'plugin',
     'wizard' => 'plugin',
-  );
+  ];
 
   /**
    * Returns the views data service.
@@ -139,9 +139,9 @@ public static function getView($id) {
    * @return
    *   A keyed array of in the form of 'base_table' => 'Description'.
    */
-  public static function fetchPluginNames($type, $key = NULL, array $base = array()) {
+  public static function fetchPluginNames($type, $key = NULL, array $base = []) {
     $definitions = static::pluginManager($type)->getDefinitions();
-    $plugins = array();
+    $plugins = [];
 
     foreach ($definitions as $id => $plugin) {
       // Skip plugins that don't conform to our key, if they have one.
@@ -169,7 +169,7 @@ public static function fetchPluginNames($type, $key = NULL, array $base = array(
    *   An array of plugin definitions for all types.
    */
   public static function getPluginDefinitions() {
-    $plugins = array();
+    $plugins = [];
     foreach (ViewExecutable::getPluginTypes() as $plugin_type) {
       $plugins[$plugin_type] = static::pluginManager($plugin_type)->getDefinitions();
     }
@@ -218,7 +218,7 @@ public static function getApplicableViews($type) {
       ->condition("display.*.display_plugin", $plugin_ids, 'IN')
       ->execute();
 
-    $result = array();
+    $result = [];
     foreach (\Drupal::entityTypeManager()->getStorage('view')->loadMultiple($entity_ids) as $view) {
       // Check each display to see if it meets the criteria and is enabled.
 
@@ -309,7 +309,7 @@ public static function getViewsAsOptions($views_only = FALSE, $filter = 'all', $
         $views = call_user_func("static::get{$filter}Views");
         break;
       default:
-        return array();
+        return [];
     }
 
     // Prepare exclude view strings for comparison.
@@ -327,7 +327,7 @@ public static function getViewsAsOptions($views_only = FALSE, $filter = 'all', $
       list($exclude_view_name, $exclude_view_display) = explode(':', "$exclude_view:");
     }
 
-    $options = array();
+    $options = [];
     foreach ($views as $view) {
       $id = $view->id();
       // Return only views.
@@ -339,10 +339,10 @@ public static function getViewsAsOptions($views_only = FALSE, $filter = 'all', $
         foreach ($view->get('display') as $display_id => $display) {
           if (!($id == $exclude_view_name && $display_id == $exclude_view_display)) {
             if ($optgroup) {
-              $options[$id][$id . ':' . $display['id']] = t('@view : @display', array('@view' => $id, '@display' => $display['id']));
+              $options[$id][$id . ':' . $display['id']] = t('@view : @display', ['@view' => $id, '@display' => $display['id']]);
             }
             else {
-              $options[$id . ':' . $display['id']] = t('View: @view - Display: @display', array('@view' => $id, '@display' => $display['id']));
+              $options[$id . ':' . $display['id']] = t('View: @view - Display: @display', ['@view' => $id, '@display' => $display['id']]);
             }
           }
         }
@@ -368,7 +368,7 @@ public static function getViewsAsOptions($views_only = FALSE, $filter = 'all', $
    */
   public static function pluginList() {
     $plugin_data = static::getPluginDefinitions();
-    $plugins = array();
+    $plugins = [];
     foreach (static::getEnabledViews() as $view) {
       foreach ($view->get('display') as $display) {
         foreach ($plugin_data as $type => $info) {
@@ -389,12 +389,12 @@ public static function pluginList() {
           $key = $type . ':' . $name;
           // Add info for this plugin.
           if (!isset($plugins[$key])) {
-            $plugins[$key] = array(
+            $plugins[$key] = [
               'type' => $type,
               'title' => $info[$name]['title'],
               'provider' => $info[$name]['provider'],
-              'views' => array(),
-            );
+              'views' => [],
+            ];
           }
 
           // Add this view to the list for this plugin.
@@ -423,8 +423,8 @@ public static function getHandlerTypes() {
     // Statically cache this so translation only occurs once per request for all
     // of these values.
     if (!isset(static::$handlerTypes)) {
-      static::$handlerTypes = array(
-        'field' => array(
+      static::$handlerTypes = [
+        'field' => [
           // title
           'title' => static::t('Fields'),
           // Lowercase title for mid-sentence.
@@ -434,60 +434,60 @@ public static function getHandlerTypes() {
           // Singular lowercase title for mid sentence
           'lstitle' => static::t('field'),
           'plural' => 'fields',
-        ),
-        'argument' => array(
+        ],
+        'argument' => [
           'title' => static::t('Contextual filters'),
           'ltitle' => static::t('contextual filters'),
           'stitle' => static::t('Contextual filter'),
           'lstitle' => static::t('contextual filter'),
           'plural' => 'arguments',
-        ),
-        'sort' => array(
+        ],
+        'sort' => [
           'title' => static::t('Sort criteria'),
           'ltitle' => static::t('sort criteria'),
           'stitle' => static::t('Sort criterion'),
           'lstitle' => static::t('sort criterion'),
           'plural' => 'sorts',
-        ),
-        'filter' => array(
+        ],
+        'filter' => [
           'title' => static::t('Filter criteria'),
           'ltitle' => static::t('filter criteria'),
           'stitle' => static::t('Filter criterion'),
           'lstitle' => static::t('filter criterion'),
           'plural' => 'filters',
-        ),
-        'relationship' => array(
+        ],
+        'relationship' => [
           'title' => static::t('Relationships'),
           'ltitle' => static::t('relationships'),
           'stitle' => static::t('Relationship'),
           'lstitle' => static::t('Relationship'),
           'plural' => 'relationships',
-        ),
-        'header' => array(
+        ],
+        'header' => [
           'title' => static::t('Header'),
           'ltitle' => static::t('header'),
           'stitle' => static::t('Header'),
           'lstitle' => static::t('Header'),
           'plural' => 'header',
           'type' => 'area',
-        ),
-        'footer' => array(
+        ],
+        'footer' => [
           'title' => static::t('Footer'),
           'ltitle' => static::t('footer'),
           'stitle' => static::t('Footer'),
           'lstitle' => static::t('Footer'),
           'plural' => 'footer',
           'type' => 'area',
-        ),
-        'empty' => array(
+        ],
+        'empty' => [
           'title' => static::t('No results behavior'),
           'ltitle' => static::t('no results behavior'),
           'stitle' => static::t('No results behavior'),
           'lstitle' => static::t('No results behavior'),
           'plural' => 'empty',
           'type' => 'area',
-        ),
-      );
+        ],
+      ];
     }
 
     return static::$handlerTypes;
@@ -508,7 +508,7 @@ public static function getPluginTypes($type = NULL) {
       return array_keys(static::$plugins);
     }
 
-    if (!in_array($type, array('plugin', 'handler'))) {
+    if (!in_array($type, ['plugin', 'handler'])) {
       throw new \Exception('Invalid plugin type used. Valid types are "plugin" or "handler".');
     }
 
@@ -522,7 +522,7 @@ public static function getPluginTypes($type = NULL) {
    *
    * See the t() documentation for details.
    */
-  protected static function t($string, array $args = array(), array $options = array()) {
+  protected static function t($string, array $args = [], array $options = []) {
     if (empty(static::$translationManager)) {
       static::$translationManager = \Drupal::service('string_translation');
     }
diff --git a/core/modules/views/src/ViewsData.php b/core/modules/views/src/ViewsData.php
index a079413337ac3606f0917581fe98840b671f9638..e5281abf364516221efc3f5ccf6f2c4310c11966 100644
--- a/core/modules/views/src/ViewsData.php
+++ b/core/modules/views/src/ViewsData.php
@@ -40,7 +40,7 @@ class ViewsData {
    *
    * @var array
    */
-  protected $storage = array();
+  protected $storage = [];
 
   /**
    * All table storage data loaded from cache.
@@ -50,7 +50,7 @@ class ViewsData {
    *
    * @var array
    */
-  protected $allStorage = array();
+  protected $allStorage = [];
 
   /**
    * Whether the data has been fully loaded in this request.
@@ -167,8 +167,8 @@ public function get($key = NULL) {
           // Write an empty cache entry if no information for that table
           // exists to avoid repeated cache get calls for this table and
           // prevent loading all tables unnecessarily.
-          $this->storage[$key] = array();
-          $this->allStorage[$key] = array();
+          $this->storage[$key] = [];
+          $this->allStorage[$key] = [];
         }
         else {
           $this->storage[$key] = $this->allStorage[$key];
@@ -208,7 +208,7 @@ protected function cacheGet($cid) {
    *   The data that will be cached.
    */
   protected function cacheSet($cid, $data) {
-    return $this->cacheBackend->set($this->prepareCid($cid), $data, Cache::PERMANENT, array('views_data', 'config:core.extension'));
+    return $this->cacheBackend->set($this->prepareCid($cid), $data, Cache::PERMANENT, ['views_data', 'config:core.extension']);
   }
 
   /**
@@ -274,9 +274,9 @@ protected function processEntityTypes(array &$data) {
       if (!empty($table_info['table']['entity type'])) {
         $entity_table = 'views_entity_' . $table_info['table']['entity type'];
 
-        $data[$entity_table]['table']['join'][$table_name] = array(
+        $data[$entity_table]['table']['join'][$table_name] = [
           'left_table' => $table_name,
-        );
+        ];
         $data[$entity_table]['table']['entity type'] = $table_info['table']['entity type'];
         // Copy over the default table group if we have none yet.
         if (!empty($table_info['table']['group']) && empty($data[$entity_table]['table']['group'])) {
@@ -297,15 +297,15 @@ protected function processEntityTypes(array &$data) {
    *     - weight: The weight of the base table.
    */
   public function fetchBaseTables() {
-    $tables = array();
+    $tables = [];
 
     foreach ($this->get() as $table => $info) {
       if (!empty($info['table']['base'])) {
-        $tables[$table] = array(
+        $tables[$table] = [
           'title' => $info['table']['base']['title'],
           'help' => !empty($info['table']['base']['help']) ? $info['table']['base']['help'] : '',
           'weight' => !empty($info['table']['base']['weight']) ? $info['table']['base']['weight'] : 0,
-        );
+        ];
       }
     }
 
@@ -327,10 +327,10 @@ public function fetchBaseTables() {
    * Clears the class storage and cache.
    */
   public function clear() {
-    $this->storage = array();
-    $this->allStorage = array();
+    $this->storage = [];
+    $this->allStorage = [];
     $this->fullyLoaded = FALSE;
-    Cache::invalidateTags(array('views_data'));
+    Cache::invalidateTags(['views_data']);
   }
 
 }
diff --git a/core/modules/views/src/ViewsDataHelper.php b/core/modules/views/src/ViewsDataHelper.php
index bbdf809ae67d385a6a5216f23736cb26fc181420..32e6adae8f26be86b108665d82d81acf107a2130 100644
--- a/core/modules/views/src/ViewsDataHelper.php
+++ b/core/modules/views/src/ViewsDataHelper.php
@@ -64,9 +64,9 @@ public function fetchFields($base, $type, $grouping = FALSE, $sub_type = NULL) {
       // each field have a cheap kind of inheritance.
 
       foreach ($data as $table => $table_data) {
-        $bases = array();
-        $strings = array();
-        $skip_bases = array();
+        $bases = [];
+        $strings = [];
+        $skip_bases = [];
         foreach ($table_data as $field => $info) {
           // Collect table data from this table
           if ($field == 'table') {
@@ -78,7 +78,7 @@ public function fetchFields($base, $type, $grouping = FALSE, $sub_type = NULL) {
             $bases[] = $table;
             continue;
           }
-          foreach (array('field', 'sort', 'filter', 'argument', 'relationship', 'area') as $key) {
+          foreach (['field', 'sort', 'filter', 'argument', 'relationship', 'area'] as $key) {
             if (!empty($info[$key])) {
               if ($grouping && !empty($info[$key]['no group by'])) {
                 continue;
@@ -96,7 +96,7 @@ public function fetchFields($base, $type, $grouping = FALSE, $sub_type = NULL) {
                   $skip_bases[$field][$key][$base_name] = TRUE;
                 }
               }
-              foreach (array('title', 'group', 'help', 'base', 'aliases') as $string) {
+              foreach (['title', 'group', 'help', 'base', 'aliases'] as $string) {
                 // First, try the lowest possible level
                 if (!empty($info[$key][$string])) {
                   $strings[$field][$key][$string] = $info[$key][$string];
@@ -120,7 +120,7 @@ public function fetchFields($base, $type, $grouping = FALSE, $sub_type = NULL) {
                 }
                 else {
                   if ($string != 'base') {
-                    $strings[$field][$key][$string] = SafeMarkup::format("Error: missing @component", array('@component' => $string));
+                    $strings[$field][$key][$string] = SafeMarkup::format("Error: missing @component", ['@component' => $string]);
                   }
                 }
               }
@@ -143,21 +143,21 @@ public function fetchFields($base, $type, $grouping = FALSE, $sub_type = NULL) {
     // all and add them together. Duplicate keys will be lost and that's
     // Just Fine.
     if (is_array($base)) {
-      $strings = array();
+      $strings = [];
       foreach ($base as $base_table) {
         if (isset($this->fields[$base_table][$type])) {
           $strings += $this->fields[$base_table][$type];
         }
       }
-      uasort($strings, array('self', 'fetchedFieldSort'));
+      uasort($strings, ['self', 'fetchedFieldSort']);
       return $strings;
     }
 
     if (isset($this->fields[$base][$type])) {
-      uasort($this->fields[$base][$type], array($this, 'fetchedFieldSort'));
+      uasort($this->fields[$base][$type], [$this, 'fetchedFieldSort']);
       return $this->fields[$base][$type];
     }
-    return array();
+    return [];
   }
 
   /**
diff --git a/core/modules/views/tests/fixtures/update/argument-placeholder.php b/core/modules/views/tests/fixtures/update/argument-placeholder.php
index 2a7cf4bb2f1e4ac939a1290b8038fef5a757c1b6..2158eb270b753849f0521c60a7027b91b3ac0a8f 100644
--- a/core/modules/views/tests/fixtures/update/argument-placeholder.php
+++ b/core/modules/views/tests/fixtures/update/argument-placeholder.php
@@ -11,9 +11,9 @@
 $connection = Database::getConnection();
 
 $connection->insert('config')
-  ->fields(array(
+  ->fields([
     'collection' => '',
     'name' => 'views.view.test_token_view',
     'data' => serialize(Yaml::decode(file_get_contents('core/modules/views/tests/modules/views_test_config/test_views/views.view.test_token_view.yml'))),
-  ))
+  ])
   ->execute();
diff --git a/core/modules/views/tests/fixtures/update/boolean-filter-values.php b/core/modules/views/tests/fixtures/update/boolean-filter-values.php
index d78a3edd7853dcfe74374b89bb3eca56a3e06d63..2b8e78fb97aa1da6b393966504ed68aa6c062445 100644
--- a/core/modules/views/tests/fixtures/update/boolean-filter-values.php
+++ b/core/modules/views/tests/fixtures/update/boolean-filter-values.php
@@ -11,9 +11,9 @@
 $connection = Database::getConnection();
 
 $connection->insert('config')
-  ->fields(array(
+  ->fields([
     'collection' => '',
     'name' => 'views.view.test_boolean_filter_values',
     'data' => serialize(Yaml::decode(file_get_contents('core/modules/views/tests/fixtures/update/views.view.test_boolean_filter_values.yml'))),
-  ))
+  ])
   ->execute();
diff --git a/core/modules/views/tests/fixtures/update/duplicate-field-handler.php b/core/modules/views/tests/fixtures/update/duplicate-field-handler.php
index 775f75a4c2e33fa33544accb700273e45b7df0a4..21cf164f41a7afddc7b03650aa8283fa1369ed92 100644
--- a/core/modules/views/tests/fixtures/update/duplicate-field-handler.php
+++ b/core/modules/views/tests/fixtures/update/duplicate-field-handler.php
@@ -11,9 +11,9 @@
 $connection = Database::getConnection();
 
 $connection->insert('config')
-  ->fields(array(
+  ->fields([
     'collection' => '',
     'name' => 'views.view.test_duplicate_field_handlers',
     'data' => serialize(Yaml::decode(file_get_contents('core/modules/views/tests/modules/views_test_config/test_views/views.view.test_duplicate_field_handlers.yml'))),
-  ))
+  ])
   ->execute();
diff --git a/core/modules/views/tests/modules/views_entity_test/views_entity_test.module b/core/modules/views/tests/modules/views_entity_test/views_entity_test.module
index 0506710f53b66973dcadd5bcd9438d22b113c3e3..cd136538f242c77ef0de4bcc3715cd93558e08d4 100644
--- a/core/modules/views/tests/modules/views_entity_test/views_entity_test.module
+++ b/core/modules/views/tests/modules/views_entity_test/views_entity_test.module
@@ -22,10 +22,10 @@ function views_entity_test_entity_base_field_info(EntityTypeInterface $entity_ty
       ->setLabel(t('Test access'))
       ->setTranslatable(FALSE)
       ->setSetting('max_length', 64)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'string_textfield',
         'weight' => 10,
-      ));
+      ]);
     return $definitions;
   }
 }
diff --git a/core/modules/views/tests/modules/views_test_data/src/Controller/ViewsTestDataController.php b/core/modules/views/tests/modules/views_test_data/src/Controller/ViewsTestDataController.php
index 6e7fcf14eaebc842ec5f014bf7dbd3fea11e3a87..987be30369924489573a3f2a4544aefbbebbf5bf 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Controller/ViewsTestDataController.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Controller/ViewsTestDataController.php
@@ -14,11 +14,11 @@ class ViewsTestDataController {
    * an exposed form.
    */
   public function errorFormPage() {
-    $build = array();
-    $build['view'] = array(
+    $build = [];
+    $build['view'] = [
       '#type' => 'view',
       '#name' => 'test_exposed_form_buttons',
-    );
+    ];
     $build['error_form'] = \Drupal::formBuilder()->getForm('Drupal\views_test_data\Form\ViewsTestDataErrorForm');
 
     return $build;
diff --git a/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataElementEmbedForm.php b/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataElementEmbedForm.php
index f80092b3ac391bf4f98ba561acffcad6eefdbe2a..80d19d1faff6874a16163156b8c109a85e2b3239 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataElementEmbedForm.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataElementEmbedForm.php
@@ -21,13 +21,13 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['view'] = array(
+    $form['view'] = [
       '#type' => 'view',
       '#name' => 'test_view_embed',
       '#display_id' => 'embed_1',
-      '#arguments' => array(25),
+      '#arguments' => [25],
       '#embed' => TRUE,
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataElementForm.php b/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataElementForm.php
index ba00cacb06af5f15211143dc91cbae6e29b94f91..78aa998006675c9e0be613bedd57d74f85a9aaad 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataElementForm.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataElementForm.php
@@ -21,13 +21,13 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['view'] = array(
+    $form['view'] = [
       '#type' => 'view',
       '#name' => 'test_view_embed',
       '#display_id' => 'default',
-      '#arguments' => array(25),
+      '#arguments' => [25],
       '#embed' => FALSE,
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataErrorForm.php b/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataErrorForm.php
index 77e578c38d056962f8a9fa2a03eb151d53813c4e..6ad0361cde2055000dc4fdb97d833b74634e1db5 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataErrorForm.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Form/ViewsTestDataErrorForm.php
@@ -21,13 +21,13 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['text'] = array(
+    $form['text'] = [
       '#type' => 'textfield',
-    );
-    $form['submit'] = array(
+    ];
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/access/StaticTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/access/StaticTest.php
index b2026f7c5b4072b3680bffe245047d46270b5a64..551598632fa1460e9a79c6f771ea1531083fba9b 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/access/StaticTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/access/StaticTest.php
@@ -19,7 +19,7 @@ class StaticTest extends AccessPluginBase {
 
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['access'] = array('default' => FALSE);
+    $options['access'] = ['default' => FALSE];
 
     return $options;
   }
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/area/TestExample.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/area/TestExample.php
index 5cd26239a14a249b9e989b892b06551e7d09e234..74818e8bb31d001bd2a24a952b5c4510a0ab8911 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/area/TestExample.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/area/TestExample.php
@@ -27,8 +27,8 @@ public function access(AccountInterface $account) {
    */
   public function defineOptions() {
     $options = parent::defineOptions();
-    $options['string'] = array('default' => '');
-    $options['custom_access'] = array('default' => TRUE);
+    $options['string'] = ['default' => ''];
+    $options['custom_access'] = ['default' => TRUE];
 
     return $options;
   }
@@ -46,11 +46,11 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    */
   public function render($empty = FALSE) {
     if (!$empty || !empty($this->options['empty'])) {
-      return array(
+      return [
         '#markup' => $this->globalTokenReplace($this->options['string']),
-      );
+      ];
     }
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/argument_default/ArgumentDefaultTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/argument_default/ArgumentDefaultTest.php
index b2ad514f36eefa863b824f0047bcbbdd77197455..ac068e17af4186dbdde36a9d0159c42e1a9521d1 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/argument_default/ArgumentDefaultTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/argument_default/ArgumentDefaultTest.php
@@ -19,7 +19,7 @@ class ArgumentDefaultTest extends ArgumentDefaultPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['value'] = array('default' => '');
+    $options['value'] = ['default' => ''];
 
     return $options;
   }
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/display/DisplayTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/display/DisplayTest.php
index c149dcb01f26f9c6b3cb6de44a27602c4d59036b..0ff2ba81f1ae83f359e4c3455c83339c1037d6aa 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/display/DisplayTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/display/DisplayTest.php
@@ -39,7 +39,7 @@ public function getType() {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['test_option'] = array('default' => '');
+    $options['test_option'] = ['default' => ''];
 
     return $options;
   }
@@ -50,21 +50,21 @@ protected function defineOptions() {
   public function optionsSummary(&$categories, &$options) {
     parent::optionsSummary($categories, $options);
 
-    $categories['display_test'] = array(
+    $categories['display_test'] = [
       'title' => $this->t('Display test settings'),
       'column' => 'second',
-      'build' => array(
+      'build' => [
         '#weight' => -100,
-      ),
-    );
+      ],
+    ];
 
     $test_option = $this->getOption('test_option') ?: $this->t('Empty');
 
-    $options['test_option'] = array(
+    $options['test_option'] = [
       'category' => 'display_test',
       'title' => $this->t('Test option'),
       'value' => views_ui_truncate($test_option, 24),
-    );
+    ];
   }
 
   /**
@@ -76,12 +76,12 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     switch ($form_state->get('section')) {
       case 'test_option':
         $form['#title'] .= $this->t('Test option');
-        $form['test_option'] = array(
+        $form['test_option'] = [
           '#title' => $this->t('Test option'),
           '#type' => 'textfield',
           '#description' => $this->t('This is a textfield for test_option.'),
           '#default_value' => $this->getOption('test_option'),
-        );
+        ];
         break;
     }
   }
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/display_extender/DisplayExtenderTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/display_extender/DisplayExtenderTest.php
index 8e3dbd82c1db5a543eec10c73b43b76ae8aacf27..25594c3584a3502dcfe6abd1838eec688aad3b13 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/display_extender/DisplayExtenderTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/display_extender/DisplayExtenderTest.php
@@ -39,19 +39,19 @@ protected function defineOptions() {
   public function optionsSummary(&$categories, &$options) {
     parent::optionsSummary($categories, $options);
 
-    $categories['display_extender_test'] = array(
+    $categories['display_extender_test'] = [
       'title' => $this->t('Display extender test settings'),
       'column' => 'second',
-      'build' => array(
+      'build' => [
         '#weight' => -100,
-      ),
-    );
+      ],
+    ];
 
-    $options['test_extender_test_option'] = array(
+    $options['test_extender_test_option'] = [
       'category' => 'display_extender_test',
       'title' => $this->t('Test option'),
       'value' => views_ui_truncate($this->options['test_extender_test_option'], 24),
-    );
+    ];
   }
 
   /**
@@ -61,12 +61,12 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     switch ($form_state->get('section')) {
       case 'test_extender_test_option':
         $form['#title'] .= $this->t('Test option');
-        $form['test_extender_test_option'] = array(
+        $form['test_extender_test_option'] = [
           '#title' => $this->t('Test option'),
           '#type' => 'textfield',
           '#description' => $this->t('This is a textfield for test_option.'),
           '#default_value' => $this->options['test_extender_test_option'],
-        );
+        ];
     }
   }
 
@@ -86,7 +86,7 @@ public function submitOptionsForm(&$form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function defaultableSections(&$sections, $section = NULL) {
-    $sections['test_extender_test_option'] = array('test_extender_test_option');
+    $sections['test_extender_test_option'] = ['test_extender_test_option'];
   }
 
   /**
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/filter/FilterTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/filter/FilterTest.php
index 4d6cd298d211fec66dd53484ed0a953c12d2834e..5bc7a190cd6e435a1ec3f6c90a5ea7bd6b8ee792 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/filter/FilterTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/filter/FilterTest.php
@@ -18,7 +18,7 @@ class FilterTest extends FilterPluginBase {
   protected function defineOptions() {
     $options = parent::defineOptions();
 
-    $options['test_enable'] = array('default' => TRUE);
+    $options['test_enable'] = ['default' => TRUE];
     return $options;
   }
 
@@ -30,11 +30,11 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['test_enable'] = array(
+    $form['test_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Controls whether the filter plugin should be active'),
       '#default_value' => $this->options['test_enable'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/query/QueryTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/query/QueryTest.php
index c1d04cf0c101cf232013d3f6ba0af8ba2df0ca4c..cf430af25c094dee4b8857d18abd6720b269d8b8 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/query/QueryTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/query/QueryTest.php
@@ -18,17 +18,17 @@
  * )
  */
 class QueryTest extends QueryPluginBase {
-  protected $conditions = array();
-  protected $fields = array();
-  protected $allItems = array();
-  protected $orderBy = array();
+  protected $conditions = [];
+  protected $fields = [];
+  protected $allItems = [];
+  protected $orderBy = [];
 
   /**
    * {@inheritdoc}
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['test_setting'] = array('default' => '');
+    $options['test_setting'] = ['default' => ''];
 
     return $options;
   }
@@ -39,11 +39,11 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['test_setting'] = array(
+    $form['test_setting'] = [
       '#title' => $this->t('Test setting'),
       '#type' => 'textfield',
       '#default_value' => $this->options['test_setting'],
-    );
+    ];
   }
 
   /**
@@ -57,21 +57,21 @@ public function setAllItems($allItems) {
   }
 
   public function addWhere($group, $field, $value = NULL, $operator = NULL) {
-    $this->conditions[] = array(
+    $this->conditions[] = [
       'field' => $field,
       'value' => $value,
       'operator' => $operator
-    );
+    ];
 
   }
 
-  public function addField($table, $field, $alias = '', $params = array()) {
+  public function addField($table, $field, $alias = '', $params = []) {
     $this->fields[$field] = $field;
     return $field;
   }
 
-  public function addOrderBy($table, $field = NULL, $order = 'ASC', $alias = '', $params = array()) {
-    $this->orderBy = array('field' => $field, 'order' => $order);
+  public function addOrderBy($table, $field = NULL, $order = 'ASC', $alias = '', $params = []) {
+    $this->orderBy = ['field' => $field, 'order' => $order];
   }
 
 
@@ -96,7 +96,7 @@ public function build(ViewExecutable $view) {
    * {@inheritdoc}
    */
   public function execute(ViewExecutable $view) {
-    $result = array();
+    $result = [];
     foreach ($this->allItems as $element) {
       // Run all conditions on the element, and add it to the result if they
       // match.
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/row/RowTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/row/RowTest.php
index 8ca36c6ff5db3c33b5ada18d87d79b4f916ea01a..6af493b1e778c63fb0ec69b1fd401f8786556e11 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/row/RowTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/row/RowTest.php
@@ -32,7 +32,7 @@ class RowTest extends RowPluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['test_option'] = array('default' => '');
+    $options['test_option'] = ['default' => ''];
 
     return $options;
   }
@@ -43,12 +43,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['test_option'] = array(
+    $form['test_option'] = [
       '#title' => $this->t('Test option'),
       '#type' => 'textfield',
       '#description' => $this->t('This is a textfield for test_option.'),
       '#default_value' => $this->options['test_option'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/MappingTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/MappingTest.php
index 2c655e745db9e7d72d5965dfd9ecd291e1fbf4c8..3ae816a8d62b3a6c5402db4d367d2d6ae38be327 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/MappingTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/MappingTest.php
@@ -24,26 +24,26 @@ class MappingTest extends Mapping {
    * {@inheritdoc}
    */
   protected function defineMapping() {
-    return array(
-      'title_field' => array(
+    return [
+      'title_field' => [
         '#title' => $this->t('Title field'),
         '#description' => $this->t('Choose the field with the custom title.'),
         '#toggle' => TRUE,
         '#required' => TRUE,
-      ),
-      'name_field' => array(
+      ],
+      'name_field' => [
         '#title' => $this->t('Name field'),
         '#description' => $this->t('Choose the field with the custom name.'),
-      ),
-      'numeric_field' => array(
+      ],
+      'numeric_field' => [
         '#title' => $this->t('Numeric field'),
         '#description' => $this->t('Select one or more numeric fields.'),
         '#multiple' => TRUE,
         '#toggle' => TRUE,
         '#filter' => 'filterNumericFields',
         '#required' => TRUE,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/StyleTest.php b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/StyleTest.php
index cb66d43f71f5291019c08da25d173e36b5e48984..9c0c3d707bdee5500fb521caf470dc63a26aa919 100644
--- a/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/StyleTest.php
+++ b/core/modules/views/tests/modules/views_test_data/src/Plugin/views/style/StyleTest.php
@@ -40,7 +40,7 @@ class StyleTest extends StylePluginBase {
    */
   protected function defineOptions() {
     $options = parent::defineOptions();
-    $options['test_option'] = array('default' => '');
+    $options['test_option'] = ['default' => ''];
 
     return $options;
   }
@@ -51,12 +51,12 @@ protected function defineOptions() {
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
 
-    $form['test_option'] = array(
+    $form['test_option'] = [
       '#title' => $this->t('Test option'),
       '#type' => 'textfield',
       '#description' => $this->t('This is a textfield for test_option.'),
       '#default_value' => $this->options['test_option'],
-    );
+    ];
   }
 
   /**
diff --git a/core/modules/views/tests/modules/views_test_data/views_test_data.install b/core/modules/views/tests/modules/views_test_data/views_test_data.install
index eeb5faa845ccc9f70b50f38ff6fad05ace74b54b..3590440b9fa0993a99394f68399cd3c78441ee2a 100644
--- a/core/modules/views/tests/modules/views_test_data/views_test_data.install
+++ b/core/modules/views/tests/modules/views_test_data/views_test_data.install
@@ -17,7 +17,7 @@ function views_test_data_schema() {
  */
 function views_test_data_install() {
   // Add the marquee tag to possible html elements to test the field handler.
-  $values = array(
+  $values = [
     'div' => 'DIV',
     'span' => 'SPAN',
     'h1' => 'H1',
@@ -30,6 +30,6 @@ function views_test_data_install() {
     'strong' => 'STRONG',
     'em' => 'EM',
     'marquee' => 'MARQUEE'
-  );
+  ];
   \Drupal::configFactory()->getEditable('views.settings')->set('field_rewrite_elements', $values)->save();
 }
diff --git a/core/modules/views/tests/modules/views_test_data/views_test_data.module b/core/modules/views/tests/modules/views_test_data/views_test_data.module
index bd917c7eee7e1c6bae8f1c28f2883eea3b71ea11..cdb99cc100f667049695c80cafd7eb972a292d46 100644
--- a/core/modules/views/tests/modules/views_test_data/views_test_data.module
+++ b/core/modules/views/tests/modules/views_test_data/views_test_data.module
@@ -66,13 +66,13 @@ function views_test_data_preprocess_views_view_table(&$variables) {
  *   - view: The view object.
  */
 function template_preprocess_views_view_mapping_test(&$variables) {
-  $variables['element'] = array();
+  $variables['element'] = [];
 
   foreach ($variables['rows'] as $delta => $row) {
-    $fields = array();
+    $fields = [];
     foreach ($variables['options']['mapping'] as $type => $field_names) {
       if (!is_array($field_names)) {
-        $field_names = array($field_names);
+        $field_names = [$field_names];
       }
       foreach ($field_names as $field_name) {
         if ($value = $variables['view']->style_plugin->getField($delta, $field_name)) {
@@ -87,26 +87,26 @@ function template_preprocess_views_view_mapping_test(&$variables) {
     }
 
     // Build a container for the row.
-    $variables['element'][$delta] = array(
+    $variables['element'][$delta] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array(
+      '#attributes' => [
+        'class' => [
           'views-row-mapping-test',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     // Add each field to the row.
     foreach ($fields as $key => $render) {
-      $variables['element'][$delta][$key] = array(
+      $variables['element'][$delta][$key] = [
         '#children' => $render,
         '#type' => 'container',
-        '#attributes' => array(
-          'class' => array(
+        '#attributes' => [
+          'class' => [
             $key,
-          ),
-        ),
-      );
+          ],
+        ],
+      ];
     }
   }
 }
diff --git a/core/modules/views/tests/modules/views_test_data/views_test_data.views.inc b/core/modules/views/tests/modules/views_test_data/views_test_data.views.inc
index ceaa8e9fed229e493945127b6ddfbe8505d1f7af..11159412b4aa258de58db82cc0ecd8d07a809312 100644
--- a/core/modules/views/tests/modules/views_test_data/views_test_data.views.inc
+++ b/core/modules/views/tests/modules/views_test_data/views_test_data.views.inc
@@ -39,7 +39,7 @@ function views_test_data_views_data_alter() {
 function views_test_data_views_analyze(ViewExecutable $view) {
   \Drupal::state()->set('views_hook_test_views_analyze', TRUE);
 
-  $ret = array();
+  $ret = [];
 
   $ret[] = Analyzer::formatMessage(t('Test ok message'), 'ok');
   $ret[] = Analyzer::formatMessage(t('Test warning message'), 'warning');
diff --git a/core/modules/views/tests/modules/views_test_data/views_test_data.views_execution.inc b/core/modules/views/tests/modules/views_test_data/views_test_data.views_execution.inc
index d9d2a668dbfb040e1ff1d367b01fdeb57d5446d3..dd69f4c95fbcd30b4842c469a85f8e99697d4056 100644
--- a/core/modules/views/tests/modules/views_test_data/views_test_data.views_execution.inc
+++ b/core/modules/views/tests/modules/views_test_data/views_test_data.views_execution.inc
@@ -22,10 +22,10 @@ function views_test_data_views_query_substitutions(ViewExecutable $view) {
 function views_test_data_views_form_substitutions() {
   \Drupal::state()->set('views_hook_test_views_form_substitutions', TRUE);
   $render = ['#markup' => '<em>unescaped</em>'];
-  return array(
+  return [
     '<!--will-be-escaped-->' => '<em>escaped</em>',
     '<!--will-be-not-escaped-->' => \Drupal::service('renderer')->renderPlain($render),
-  );
+  ];
 }
 
 /**
diff --git a/core/modules/views/tests/src/FunctionalJavascript/GlossaryViewTest.php b/core/modules/views/tests/src/FunctionalJavascript/GlossaryViewTest.php
index 42da7b6593b7c34dcc012f54a7fce6bc634fd099..3611829e8c9479a0f0723978559d8018d0512cc7 100644
--- a/core/modules/views/tests/src/FunctionalJavascript/GlossaryViewTest.php
+++ b/core/modules/views/tests/src/FunctionalJavascript/GlossaryViewTest.php
@@ -42,7 +42,7 @@ class GlossaryViewTest extends JavascriptTestBase {
   protected function setUp() {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('views_test_config'));
+    ViewTestData::createTestViews(get_class($this), ['views_test_config']);
 
     // Create a Content type and some test nodes with titles that start with
     // different letters.
diff --git a/core/modules/views/tests/src/Kernel/BasicTest.php b/core/modules/views/tests/src/Kernel/BasicTest.php
index 49f4398bfb176df7ff5cd4a26a1664ec3a6f0d42..4ef22b140842909335cb5fce40e3ecd0f7344341 100644
--- a/core/modules/views/tests/src/Kernel/BasicTest.php
+++ b/core/modules/views/tests/src/Kernel/BasicTest.php
@@ -16,7 +16,7 @@ class BasicTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'test_simple_argument');
+  public static $testViews = ['test_view', 'test_simple_argument'];
 
   /**
    * Tests a trivial result set.
@@ -30,10 +30,10 @@ public function testSimpleResultSet() {
 
     // Verify the result.
     $this->assertEqual(5, count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultset($view, $this->dataSet(), array(
+    $this->assertIdenticalResultset($view, $this->dataSet(), [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
   }
 
   /**
@@ -44,55 +44,55 @@ public function testSimpleFiltering() {
     $view->setDisplay();
 
     // Add a filter.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'operator' => '<',
-        'value' => array(
+        'value' => [
           'value' => '28',
           'min' => '',
           'max' => '',
-        ),
+        ],
         'group' => '0',
         'exposed' => FALSE,
-        'expose' => array(
+        'expose' => [
           'operator' => FALSE,
           'label' => '',
-        ),
+        ],
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     // Execute the view.
     $this->executeView($view);
 
     // Build the expected result.
-    $dataset = array(
-      array(
+    $dataset = [
+      [
         'id' => 1,
         'name' => 'John',
         'age' => 25,
-      ),
-      array(
+      ],
+      [
         'id' => 2,
         'name' => 'George',
         'age' => 27,
-      ),
-      array(
+      ],
+      [
         'id' => 4,
         'name' => 'Paul',
         'age' => 26,
-      ),
-    );
+      ],
+    ];
 
     // Verify the result.
     $this->assertEqual(3, count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultSet($view, $dataset, array(
+    $this->assertIdenticalResultSet($view, $dataset, [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
   }
 
   /**
@@ -101,24 +101,24 @@ public function testSimpleFiltering() {
   public function testSimpleArgument() {
     // Execute with a view
     $view = Views::getView('test_simple_argument');
-    $view->setArguments(array(27));
+    $view->setArguments([27]);
     $this->executeView($view);
 
     // Build the expected result.
-    $dataset = array(
-      array(
+    $dataset = [
+      [
         'id' => 2,
         'name' => 'George',
         'age' => 27,
-      ),
-    );
+      ],
+    ];
 
     // Verify the result.
     $this->assertEqual(1, count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultSet($view, $dataset, array(
+    $this->assertIdenticalResultSet($view, $dataset, [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
 
     // Test "show all" if no argument is present.
     $view = Views::getView('test_simple_argument');
@@ -128,10 +128,10 @@ public function testSimpleArgument() {
     $dataset = $this->dataSet();
 
     $this->assertEqual(5, count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultSet($view, $dataset, array(
+    $this->assertIdenticalResultSet($view, $dataset, [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
   }
 
 }
diff --git a/core/modules/views/tests/src/Kernel/Entity/RowEntityRenderersTest.php b/core/modules/views/tests/src/Kernel/Entity/RowEntityRenderersTest.php
index dfcb30e2024e63a24d984f864cb8f6bc13ca642a..b20f98118c8ebb34444566b715043db133882809 100644
--- a/core/modules/views/tests/src/Kernel/Entity/RowEntityRenderersTest.php
+++ b/core/modules/views/tests/src/Kernel/Entity/RowEntityRenderersTest.php
@@ -27,7 +27,7 @@ class RowEntityRenderersTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_entity_row_renderers');
+  public static $testViews = ['test_entity_row_renderers'];
 
   /**
    * An array of added languages.
@@ -51,13 +51,13 @@ protected function setUp($import_test_views = TRUE) {
 
     $this->installEntitySchema('node');
     $this->installEntitySchema('user');
-    $this->installSchema('node', array('node_access'));
-    $this->installConfig(array('node', 'language'));
+    $this->installSchema('node', ['node_access']);
+    $this->installConfig(['node', 'language']);
 
     // The entity.node.canonical route must exist when nodes are rendered.
     $this->container->get('router.builder')->rebuild();
 
-    $this->langcodes = array(\Drupal::languageManager()->getDefaultLanguage()->getId());
+    $this->langcodes = [\Drupal::languageManager()->getDefaultLanguage()->getId()];
     for ($i = 0; $i < 2; $i++) {
       $langcode = 'l' . $i;
       $this->langcodes[] = $langcode;
@@ -65,27 +65,27 @@ protected function setUp($import_test_views = TRUE) {
     }
 
     // Make sure we do not try to render non-existing user data.
-    $node_type = NodeType::create(array('type' => 'test'));
+    $node_type = NodeType::create(['type' => 'test']);
     $node_type->setDisplaySubmitted(FALSE);
     $node_type->save();
 
-    $this->values = array();
+    $this->values = [];
     $controller = \Drupal::entityManager()->getStorage('node');
     $langcode_index = 0;
 
     for ($i = 0; $i < count($this->langcodes); $i++) {
       // Create a node with a different default language each time.
       $default_langcode = $this->langcodes[$langcode_index++];
-      $node = $controller->create(array('type' => 'test', 'uid' => 0, 'langcode' => $default_langcode));
+      $node = $controller->create(['type' => 'test', 'uid' => 0, 'langcode' => $default_langcode]);
       // Ensure the default language is processed first.
-      $langcodes = array_merge(array($default_langcode), array_diff($this->langcodes, array($default_langcode)));
+      $langcodes = array_merge([$default_langcode], array_diff($this->langcodes, [$default_langcode]));
 
       foreach ($langcodes as $langcode) {
         // Ensure we have a predictable result order.
         $this->values[$i][$langcode] = $i . '-' . $langcode . '-' . $this->randomMachineName();
 
         if ($langcode != $default_langcode) {
-          $node->addTranslation($langcode, array('title' => $this->values[$i][$langcode]));
+          $node->addTranslation($langcode, ['title' => $this->values[$i][$langcode]]);
         }
         else {
           $node->setTitle($this->values[$i][$langcode]);
@@ -121,7 +121,7 @@ public function testFieldRenderers() {
    *   node.
    */
   protected function checkLanguageRenderers($display, $values) {
-    $expected = array(
+    $expected = [
       $values[0]['en'],
       $values[0]['en'],
       $values[0]['en'],
@@ -131,10 +131,10 @@ protected function checkLanguageRenderers($display, $values) {
       $values[2]['en'],
       $values[2]['en'],
       $values[2]['en'],
-    );
+    ];
     $this->assertTranslations($display, '***LANGUAGE_language_content***', $expected, 'The current language renderer behaves as expected.');
 
-    $expected = array(
+    $expected = [
       $values[0]['en'],
       $values[0]['en'],
       $values[0]['en'],
@@ -144,10 +144,10 @@ protected function checkLanguageRenderers($display, $values) {
       $values[2]['l1'],
       $values[2]['l1'],
       $values[2]['l1'],
-    );
+    ];
     $this->assertTranslations($display, '***LANGUAGE_entity_default***', $expected, 'The default language renderer behaves as expected.');
 
-    $expected = array(
+    $expected = [
       $values[0]['en'],
       $values[0]['l0'],
       $values[0]['l1'],
@@ -157,10 +157,10 @@ protected function checkLanguageRenderers($display, $values) {
       $values[2]['en'],
       $values[2]['l0'],
       $values[2]['l1'],
-    );
+    ];
     $this->assertTranslations($display, '***LANGUAGE_entity_translation***', $expected, 'The translation language renderer behaves as expected.');
 
-    $expected = array(
+    $expected = [
       $values[0][$this->langcodes[0]],
       $values[0][$this->langcodes[0]],
       $values[0][$this->langcodes[0]],
@@ -170,10 +170,10 @@ protected function checkLanguageRenderers($display, $values) {
       $values[2][$this->langcodes[0]],
       $values[2][$this->langcodes[0]],
       $values[2][$this->langcodes[0]],
-    );
+    ];
     $this->assertTranslations($display, '***LANGUAGE_site_default***', $expected, 'The site default language renderer behaves as expected.');
 
-    $expected = array(
+    $expected = [
       $values[0]['l0'],
       $values[0]['l0'],
       $values[0]['l0'],
@@ -183,7 +183,7 @@ protected function checkLanguageRenderers($display, $values) {
       $values[2]['l0'],
       $values[2]['l0'],
       $values[2]['l0'],
-    );
+    ];
     $this->assertTranslations($display, 'l0', $expected, 'The language specific renderer behaves as expected.');
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Entity/ViewEntityDependenciesTest.php b/core/modules/views/tests/src/Kernel/Entity/ViewEntityDependenciesTest.php
index f97659a7f0f6ad42744b2afdc2e23c684c25913a..4929c7ecf7175e63ed9e6d546597ff4ef11f60e1 100644
--- a/core/modules/views/tests/src/Kernel/Entity/ViewEntityDependenciesTest.php
+++ b/core/modules/views/tests/src/Kernel/Entity/ViewEntityDependenciesTest.php
@@ -40,14 +40,14 @@ protected function setUp($import_test_views = TRUE) {
 
     // Install the necessary dependencies for node type creation to work.
     $this->installEntitySchema('node');
-    $this->installConfig(array('field', 'node'));
+    $this->installConfig(['field', 'node']);
 
-    $comment_type = CommentType::create(array(
+    $comment_type = CommentType::create([
       'id' => 'comment',
       'label' => 'Comment settings',
       'description' => 'Comment settings',
       'target_entity_type_id' => 'node',
-    ));
+    ]);
     $comment_type->save();
 
     $content_type = NodeType::create([
@@ -55,29 +55,29 @@ protected function setUp($import_test_views = TRUE) {
       'name' => $this->randomString(),
     ]);
     $content_type->save();
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => Unicode::strtolower($this->randomMachineName()),
       'entity_type' => 'node',
       'type' => 'comment',
-    ));
+    ]);
     $field_storage->save();
     FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => $content_type->id(),
       'label' => $this->randomMachineName() . '_label',
       'description' => $this->randomMachineName() . '_description',
-      'settings' => array(
+      'settings' => [
         'comment_type' => $comment_type->id(),
-      ),
+      ],
     ])->save();
     FieldConfig::create([
       'field_storage' => FieldStorageConfig::loadByName('node', 'body'),
       'bundle' => $content_type->id(),
       'label' => $this->randomMachineName() . '_body',
-      'settings' => array('display_summary' => TRUE),
+      'settings' => ['display_summary' => TRUE],
     ])->save();
 
-    ViewTestData::createTestViews(get_class($this), array('views_test_config'));
+    ViewTestData::createTestViews(get_class($this), ['views_test_config']);
   }
 
   /**
diff --git a/core/modules/views/tests/src/Kernel/EventSubscriber/ViewsEntitySchemaSubscriberIntegrationTest.php b/core/modules/views/tests/src/Kernel/EventSubscriber/ViewsEntitySchemaSubscriberIntegrationTest.php
index 3c46c9eddd0bc0ee3a00a6e0936769734ef13a81..bf982724fe4994cca1d3a9575303c12155ad30cd 100644
--- a/core/modules/views/tests/src/Kernel/EventSubscriber/ViewsEntitySchemaSubscriberIntegrationTest.php
+++ b/core/modules/views/tests/src/Kernel/EventSubscriber/ViewsEntitySchemaSubscriberIntegrationTest.php
@@ -79,7 +79,7 @@ protected function setUp($import_test_views = TRUE) {
 
     // Install every entity type's schema that wasn't installed in the parent
     // method.
-    foreach (array_diff_key($this->entityManager->getDefinitions(), array_flip(array('user', 'entity_test'))) as $entity_type_id => $entity_type) {
+    foreach (array_diff_key($this->entityManager->getDefinitions(), array_flip(['user', 'entity_test'])) as $entity_type_id => $entity_type) {
       $this->installEntitySchema($entity_type_id);
     }
   }
diff --git a/core/modules/views/tests/src/Kernel/Handler/AreaEntityTest.php b/core/modules/views/tests/src/Kernel/Handler/AreaEntityTest.php
index ebf9e054c80703d1059d94ecf0d489316acddbf2..a95214a782e2f9dab5602ff3eb6c13a7275a1e54 100644
--- a/core/modules/views/tests/src/Kernel/Handler/AreaEntityTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/AreaEntityTest.php
@@ -31,7 +31,7 @@ class AreaEntityTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_entity_area');
+  public static $testViews = ['test_entity_area'];
 
   /**
    * {@inheritdoc}
@@ -70,9 +70,9 @@ public function testEntityAreaData() {
 
     // Test that all expected entity types have data.
     foreach (array_keys($expected_entities) as $entity) {
-      $this->assertTrue(!empty($data['entity_' . $entity]), format_string('Views entity area data found for @entity', array('@entity' => $entity)));
+      $this->assertTrue(!empty($data['entity_' . $entity]), format_string('Views entity area data found for @entity', ['@entity' => $entity]));
       // Test that entity_type is set correctly in the area data.
-      $this->assertEqual($entity, $data['entity_' . $entity]['area']['entity_type'], format_string('Correct entity_type set for @entity', array('@entity' => $entity)));
+      $this->assertEqual($entity, $data['entity_' . $entity]['area']['entity_type'], format_string('Correct entity_type set for @entity', ['@entity' => $entity]));
     }
 
     $expected_entities = array_filter($entity_types, function (EntityTypeInterface $type) {
@@ -81,7 +81,7 @@ public function testEntityAreaData() {
 
     // Test that no configuration entity types have data.
     foreach (array_keys($expected_entities) as $entity) {
-      $this->assertTrue(empty($data['entity_' . $entity]), format_string('Views config entity area data not found for @entity', array('@entity' => $entity)));
+      $this->assertTrue(empty($data['entity_' . $entity]), format_string('Views config entity area data not found for @entity', ['@entity' => $entity]));
     }
   }
 
@@ -90,10 +90,10 @@ public function testEntityAreaData() {
    */
   public function testEntityArea() {
     /** @var \Drupal\Core\Entity\EntityInterface[] $entities */
-    $entities = array();
+    $entities = [];
     for ($i = 0; $i < 3; $i++) {
       $random_label = $this->randomMachineName();
-      $data = array('bundle' => 'entity_test', 'name' => $random_label);
+      $data = ['bundle' => 'entity_test', 'name' => $random_label];
       $entity_test = $this->container->get('entity.manager')
         ->getStorage('entity_test')
         ->create($data);
@@ -137,7 +137,7 @@ public function doTestRender($entities) {
     $this->assertTrue(strpos(trim((string) $result[0]), $entities[1]->label()) !== FALSE, 'The rendered entity appears in the footer of the view.');
     $this->assertTrue(strpos(trim((string) $result[0]), 'full') !== FALSE, 'The rendered entity appeared in the right view mode.');
 
-    $preview = $view->preview('default', array($entities[1]->id()));
+    $preview = $view->preview('default', [$entities[1]->id()]);
     $this->setRawContent($renderer->renderRoot($preview));
 
     $result = $this->xpath($header_xpath);
@@ -159,7 +159,7 @@ public function doTestRender($entities) {
     $item['view_mode'] = 'test';
     $view->setHandler('default', 'header', 'entity_entity_test', $item);
 
-    $preview = $view->preview('default', array($entities[1]->id()));
+    $preview = $view->preview('default', [$entities[1]->id()]);
     $this->setRawContent($renderer->renderRoot($preview));
     $view_class = 'js-view-dom-id-' . $view->dom_id;
     $result = $this->xpath('//div[@class = "' . $view_class . '"]/header[1]');
@@ -168,14 +168,14 @@ public function doTestRender($entities) {
 
     // Test entity access.
     $view = Views::getView('test_entity_area');
-    $preview = $view->preview('default', array($entities[2]->id()));
+    $preview = $view->preview('default', [$entities[2]->id()]);
     $this->setRawContent($renderer->renderRoot($preview));
     $view_class = 'js-view-dom-id-' . $view->dom_id;
     $result = $this->xpath('//div[@class = "' . $view_class . '"]/footer[1]');
     $this->assertTrue(strpos($result[0], $entities[2]->label()) === FALSE, 'The rendered entity does not appear in the footer of the view.');
 
     // Test the available view mode options.
-    $form = array();
+    $form = [];
     $form_state = (new FormState())
       ->set('type', 'header');
     $view->display_handler->getHandler('header', 'entity_entity_test')->buildOptionsForm($form, $form_state);
diff --git a/core/modules/views/tests/src/Kernel/Handler/AreaMessagesTest.php b/core/modules/views/tests/src/Kernel/Handler/AreaMessagesTest.php
index 7e1fbb9125edef2146ee451d78cd4d850bc89f03..476551c9a8ffb70e9285668e14ef4585ba80716c 100644
--- a/core/modules/views/tests/src/Kernel/Handler/AreaMessagesTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/AreaMessagesTest.php
@@ -18,7 +18,7 @@ class AreaMessagesTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_area_messages');
+  public static $testViews = ['test_area_messages'];
 
   /**
    * Tests the messages area handler.
diff --git a/core/modules/views/tests/src/Kernel/Handler/AreaOrderTest.php b/core/modules/views/tests/src/Kernel/Handler/AreaOrderTest.php
index 9ade514b8dd7b5b921d25ac20b782e052bfa4930..84a66ab5c8facf92249eccaad1e270e0e43f83c4 100644
--- a/core/modules/views/tests/src/Kernel/Handler/AreaOrderTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/AreaOrderTest.php
@@ -21,14 +21,14 @@ class AreaOrderTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'block');
+  public static $modules = ['user', 'block'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_area_order');
+  public static $testViews = ['test_area_order'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/views/tests/src/Kernel/Handler/AreaTextTest.php b/core/modules/views/tests/src/Kernel/Handler/AreaTextTest.php
index 5ccacd87bb07102b6906210858fd4c167bd48c23..2feaaf144e0539937374f9f8a0fd54f93a4ecf6c 100644
--- a/core/modules/views/tests/src/Kernel/Handler/AreaTextTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/AreaTextTest.php
@@ -13,19 +13,19 @@
  */
 class AreaTextTest extends ViewsKernelTestBase {
 
-  public static $modules = array('system', 'user', 'filter');
+  public static $modules = ['system', 'user', 'filter'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
 
-    $this->installConfig(array('system', 'filter'));
+    $this->installConfig(['system', 'filter']);
     $this->installEntitySchema('user');
   }
 
@@ -37,16 +37,16 @@ public function testAreaText() {
 
     // add a text header
     $string = $this->randomMachineName();
-    $view->displayHandlers->get('default')->overrideOption('header', array(
-      'area' => array(
+    $view->displayHandlers->get('default')->overrideOption('header', [
+      'area' => [
         'id' => 'area',
         'table' => 'views',
         'field' => 'area',
-        'content' => array(
+        'content' => [
           'value' => $string,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     // Execute the view.
     $this->executeView($view);
@@ -60,7 +60,7 @@ public function testAreaText() {
     $this->assertEqual(check_markup($string), $renderer->renderRoot($build), 'Existent format should return something');
 
     // Empty results, and it shouldn't be displayed .
-    $this->assertEqual(array(), $view->display_handler->handlers['header']['area']->render(TRUE), 'No result should lead to no header');
+    $this->assertEqual([], $view->display_handler->handlers['header']['area']->render(TRUE), 'No result should lead to no header');
     // Empty results, and it should be displayed.
     $view->display_handler->handlers['header']['area']->options['empty'] = TRUE;
     $build = $view->display_handler->handlers['header']['area']->render(TRUE);
diff --git a/core/modules/views/tests/src/Kernel/Handler/AreaTitleTest.php b/core/modules/views/tests/src/Kernel/Handler/AreaTitleTest.php
index f2a4151ea8d6f252fff60523f58c6f7aafa6091a..8c16b63088d9a1ead0ba712d676ba73f048bca9d 100644
--- a/core/modules/views/tests/src/Kernel/Handler/AreaTitleTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/AreaTitleTest.php
@@ -18,7 +18,7 @@ class AreaTitleTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_area_title');
+  public static $testViews = ['test_area_title'];
 
   /**
    * Tests the title area handler.
@@ -34,7 +34,7 @@ public function testTitleText() {
 
     $view->setDisplay('default');
     $this->executeView($view);
-    $view->result = array();
+    $view->result = [];
     $view->render();
     $this->assertEqual($view->getTitle(), 'test_title_empty', 'The title area should override the title if the result is empty.');
     $view->destroy();
@@ -47,7 +47,7 @@ public function testTitleText() {
 
     $view->setDisplay('page_1');
     $this->executeView($view);
-    $view->result = array();
+    $view->result = [];
     $view->render();
     $this->assertEqual($view->getTitle(), 'test_title_empty', 'The title area should override the title if the result is empty.');
     $view->destroy();
diff --git a/core/modules/views/tests/src/Kernel/Handler/AreaViewTest.php b/core/modules/views/tests/src/Kernel/Handler/AreaViewTest.php
index 89fe49e9e23c1b55a49718b8f8c6635b9039d1fe..6eaba132d56e7345f368a680e449ccf7e3100c90 100644
--- a/core/modules/views/tests/src/Kernel/Handler/AreaViewTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/AreaViewTest.php
@@ -18,14 +18,14 @@ class AreaViewTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user');
+  public static $modules = ['user'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_simple_argument', 'test_area_view');
+  public static $testViews = ['test_simple_argument', 'test_area_view'];
 
   /**
    * Tests the view area handler.
@@ -44,7 +44,7 @@ public function testViewArea() {
     $this->assertTrue(strpos($output, 'js-view-dom-id-' . $view->dom_id) !== FALSE, 'The test view is correctly embedded.');
     $view->destroy();
 
-    $view->setArguments(array(27));
+    $view->setArguments([27]);
     $this->executeView($view);
     $output = $view->render();
     $output = $renderer->renderRoot($output);
diff --git a/core/modules/views/tests/src/Kernel/Handler/ArgumentDateTest.php b/core/modules/views/tests/src/Kernel/Handler/ArgumentDateTest.php
index 527bd724f244b2d71e8f6d017d68b34f7aabcd18..db26e11a8fb1932f02a6960ab7d829b4b2315ec4 100644
--- a/core/modules/views/tests/src/Kernel/Handler/ArgumentDateTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/ArgumentDateTest.php
@@ -18,16 +18,16 @@ class ArgumentDateTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_argument_date');
+  public static $testViews = ['test_argument_date'];
 
   /**
    * Stores the column map for this testCase.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'id' => 'id',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -35,14 +35,14 @@ class ArgumentDateTest extends ViewsKernelTestBase {
   public function viewsData() {
     $data = parent::viewsData();
 
-    $date_plugins = array(
+    $date_plugins = [
       'date_fulldate',
       'date_day',
       'date_month',
       'date_week',
       'date_year',
       'date_year_month',
-    );
+    ];
     foreach ($date_plugins as $plugin_id) {
       $data['views_test_data'][$plugin_id] = $data['views_test_data']['created'];
       $data['views_test_data'][$plugin_id]['real field'] = 'created';
@@ -59,25 +59,25 @@ public function viewsData() {
   public function testCreatedFullDateHandler() {
     $view = Views::getView('test_argument_date');
     $view->setDisplay('default');
-    $this->executeView($view, array('20000102'));
-    $expected = array();
-    $expected[] = array('id' => 2);
+    $this->executeView($view, ['20000102']);
+    $expected = [];
+    $expected[] = ['id' => 2];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('default');
-    $this->executeView($view, array('20000101'));
-    $expected = array();
-    $expected[] = array('id' => 1);
-    $expected[] = array('id' => 3);
-    $expected[] = array('id' => 4);
-    $expected[] = array('id' => 5);
+    $this->executeView($view, ['20000101']);
+    $expected = [];
+    $expected[] = ['id' => 1];
+    $expected[] = ['id' => 3];
+    $expected[] = ['id' => 4];
+    $expected[] = ['id' => 5];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('default');
-    $this->executeView($view, array('20001023'));
-    $expected = array();
+    $this->executeView($view, ['20001023']);
+    $expected = [];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
   }
@@ -90,25 +90,25 @@ public function testCreatedFullDateHandler() {
   public function testDayHandler() {
     $view = Views::getView('test_argument_date');
     $view->setDisplay('embed_1');
-    $this->executeView($view, array('02'));
-    $expected = array();
-    $expected[] = array('id' => 2);
+    $this->executeView($view, ['02']);
+    $expected = [];
+    $expected[] = ['id' => 2];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_1');
-    $this->executeView($view, array('01'));
-    $expected = array();
-    $expected[] = array('id' => 1);
-    $expected[] = array('id' => 3);
-    $expected[] = array('id' => 4);
-    $expected[] = array('id' => 5);
+    $this->executeView($view, ['01']);
+    $expected = [];
+    $expected[] = ['id' => 1];
+    $expected[] = ['id' => 3];
+    $expected[] = ['id' => 4];
+    $expected[] = ['id' => 5];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_1');
-    $this->executeView($view, array('23'));
-    $expected = array();
+    $this->executeView($view, ['23']);
+    $expected = [];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
   }
 
@@ -120,19 +120,19 @@ public function testDayHandler() {
   public function testMonthHandler() {
     $view = Views::getView('test_argument_date');
     $view->setDisplay('embed_2');
-    $this->executeView($view, array('01'));
-    $expected = array();
-    $expected[] = array('id' => 1);
-    $expected[] = array('id' => 2);
-    $expected[] = array('id' => 3);
-    $expected[] = array('id' => 4);
-    $expected[] = array('id' => 5);
+    $this->executeView($view, ['01']);
+    $expected = [];
+    $expected[] = ['id' => 1];
+    $expected[] = ['id' => 2];
+    $expected[] = ['id' => 3];
+    $expected[] = ['id' => 4];
+    $expected[] = ['id' => 5];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_2');
-    $this->executeView($view, array('12'));
-    $expected = array();
+    $this->executeView($view, ['12']);
+    $expected = [];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
   }
 
@@ -143,27 +143,27 @@ public function testMonthHandler() {
    */
   public function testWeekHandler() {
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 9, 26, 2008)))
+      ->fields(['created' => gmmktime(0, 0, 0, 9, 26, 2008)])
       ->condition('id', 1)
       ->execute();
 
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 2, 29, 2004)))
+      ->fields(['created' => gmmktime(0, 0, 0, 2, 29, 2004)])
       ->condition('id', 2)
       ->execute();
 
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 1, 1, 2000)))
+      ->fields(['created' => gmmktime(0, 0, 0, 1, 1, 2000)])
       ->condition('id', 3)
       ->execute();
 
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 1, 10, 2000)))
+      ->fields(['created' => gmmktime(0, 0, 0, 1, 10, 2000)])
       ->condition('id', 4)
       ->execute();
 
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 2, 1, 2000)))
+      ->fields(['created' => gmmktime(0, 0, 0, 2, 1, 2000)])
       ->condition('id', 5)
       ->execute();
 
@@ -171,46 +171,46 @@ public function testWeekHandler() {
     $view->setDisplay('embed_3');
     // Check the week calculation for a leap year.
     // @see http://wikipedia.org/wiki/ISO_week_date#Calculation
-    $this->executeView($view, array('39'));
-    $expected = array();
-    $expected[] = array('id' => 1);
+    $this->executeView($view, ['39']);
+    $expected = [];
+    $expected[] = ['id' => 1];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_3');
     // Check the week calculation for the 29th of February in a leap year.
     // @see http://wikipedia.org/wiki/ISO_week_date#Calculation
-    $this->executeView($view, array('09'));
-    $expected = array();
-    $expected[] = array('id' => 2);
+    $this->executeView($view, ['09']);
+    $expected = [];
+    $expected[] = ['id' => 2];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_3');
     // The first jan 2000 was still in the last week of the previous year.
-    $this->executeView($view, array('52'));
-    $expected = array();
-    $expected[] = array('id' => 3);
+    $this->executeView($view, ['52']);
+    $expected = [];
+    $expected[] = ['id' => 3];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_3');
-    $this->executeView($view, array('02'));
-    $expected = array();
-    $expected[] = array('id' => 4);
+    $this->executeView($view, ['02']);
+    $expected = [];
+    $expected[] = ['id' => 4];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_3');
-    $this->executeView($view, array('05'));
-    $expected = array();
-    $expected[] = array('id' => 5);
+    $this->executeView($view, ['05']);
+    $expected = [];
+    $expected[] = ['id' => 5];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_3');
-    $this->executeView($view, array('23'));
-    $expected = array();
+    $this->executeView($view, ['23']);
+    $expected = [];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
   }
 
@@ -221,47 +221,47 @@ public function testWeekHandler() {
    */
   public function testYearHandler() {
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 1, 1, 2001)))
+      ->fields(['created' => gmmktime(0, 0, 0, 1, 1, 2001)])
       ->condition('id', 3)
       ->execute();
 
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 1, 1, 2002)))
+      ->fields(['created' => gmmktime(0, 0, 0, 1, 1, 2002)])
       ->condition('id', 4)
       ->execute();
 
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 1, 1, 2002)))
+      ->fields(['created' => gmmktime(0, 0, 0, 1, 1, 2002)])
       ->condition('id', 5)
       ->execute();
 
     $view = Views::getView('test_argument_date');
     $view->setDisplay('embed_4');
-    $this->executeView($view, array('2000'));
-    $expected = array();
-    $expected[] = array('id' => 1);
-    $expected[] = array('id' => 2);
+    $this->executeView($view, ['2000']);
+    $expected = [];
+    $expected[] = ['id' => 1];
+    $expected[] = ['id' => 2];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_4');
-    $this->executeView($view, array('2001'));
-    $expected = array();
-    $expected[] = array('id' => 3);
+    $this->executeView($view, ['2001']);
+    $expected = [];
+    $expected[] = ['id' => 3];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_4');
-    $this->executeView($view, array('2002'));
-    $expected = array();
-    $expected[] = array('id' => 4);
-    $expected[] = array('id' => 5);
+    $this->executeView($view, ['2002']);
+    $expected = [];
+    $expected[] = ['id' => 4];
+    $expected[] = ['id' => 5];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_4');
-    $this->executeView($view, array('23'));
-    $expected = array();
+    $this->executeView($view, ['23']);
+    $expected = [];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
   }
 
@@ -272,47 +272,47 @@ public function testYearHandler() {
    */
   public function testYearMonthHandler() {
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 1, 1, 2001)))
+      ->fields(['created' => gmmktime(0, 0, 0, 1, 1, 2001)])
       ->condition('id', 3)
       ->execute();
 
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 4, 1, 2001)))
+      ->fields(['created' => gmmktime(0, 0, 0, 4, 1, 2001)])
       ->condition('id', 4)
       ->execute();
 
     $this->container->get('database')->update('views_test_data')
-      ->fields(array('created' => gmmktime(0, 0, 0, 4, 1, 2001)))
+      ->fields(['created' => gmmktime(0, 0, 0, 4, 1, 2001)])
       ->condition('id', 5)
       ->execute();
 
     $view = Views::getView('test_argument_date');
     $view->setDisplay('embed_5');
-    $this->executeView($view, array('200001'));
-    $expected = array();
-    $expected[] = array('id' => 1);
-    $expected[] = array('id' => 2);
+    $this->executeView($view, ['200001']);
+    $expected = [];
+    $expected[] = ['id' => 1];
+    $expected[] = ['id' => 2];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_5');
-    $this->executeView($view, array('200101'));
-    $expected = array();
-    $expected[] = array('id' => 3);
+    $this->executeView($view, ['200101']);
+    $expected = [];
+    $expected[] = ['id' => 3];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_5');
-    $this->executeView($view, array('200104'));
-    $expected = array();
-    $expected[] = array('id' => 4);
-    $expected[] = array('id' => 5);
+    $this->executeView($view, ['200104']);
+    $expected = [];
+    $expected[] = ['id' => 4];
+    $expected[] = ['id' => 5];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
     $view->destroy();
 
     $view->setDisplay('embed_5');
-    $this->executeView($view, array('201301'));
-    $expected = array();
+    $this->executeView($view, ['201301']);
+    $expected = [];
     $this->assertIdenticalResultset($view, $expected, $this->columnMap);
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/ArgumentNullTest.php b/core/modules/views/tests/src/Kernel/Handler/ArgumentNullTest.php
index e90ec85560e56da325a50965fd5f20d2965293ac..99fa7c8675169ca6767829f46f467b208c51ab72 100644
--- a/core/modules/views/tests/src/Kernel/Handler/ArgumentNullTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/ArgumentNullTest.php
@@ -17,7 +17,7 @@ class ArgumentNullTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   function viewsData() {
     $data = parent::viewsData();
@@ -32,13 +32,13 @@ public function testAreaText() {
     $view->setDisplay();
 
     // Add a null argument.
-    $view->displayHandlers->get('default')->overrideOption('arguments', array(
-      'null' => array(
+    $view->displayHandlers->get('default')->overrideOption('arguments', [
+      'null' => [
         'id' => 'null',
         'table' => 'views',
         'field' => 'null',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
@@ -57,15 +57,15 @@ public function testAreaText() {
     $view->setDisplay();
 
     // Add a argument, which has null as handler.
-    $view->displayHandlers->get('default')->overrideOption('arguments', array(
-      'id' => array(
+    $view->displayHandlers->get('default')->overrideOption('arguments', [
+      'id' => [
         'id' => 'id',
         'table' => 'views_test_data',
         'field' => 'id',
-      ),
-    ));
+      ],
+    ]);
 
-    $this->executeView($view, array(26));
+    $this->executeView($view, [26]);
 
     // The argument should be ignored, so every result should return.
     $this->assertEqual(5, count($view->result));
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldBooleanTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldBooleanTest.php
index 1a5551c773ffdefeca72105f567c0421c5fb233e..01f5166447b75f6027c7b3fb50499aa319088a22 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldBooleanTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldBooleanTest.php
@@ -17,7 +17,7 @@ class FieldBooleanTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   function dataSet() {
     // Use default dataset but remove the age from john and paul
@@ -37,14 +37,14 @@ public function testFieldBoolean() {
     $view = Views::getView('test_view');
     $view->setDisplay();
 
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
@@ -70,7 +70,7 @@ public function testFieldBoolean() {
     $this->assertEqual('✔', $view->field['age']->advancedRender($view->result[1]));
 
     // Set a custom output format.
-    $view->field['age']->formats['test'] = array(t('Test-True'), t('Test-False'));
+    $view->field['age']->formats['test'] = [t('Test-True'), t('Test-False')];
     $view->field['age']->options['type'] = 'test';
     $this->assertEqual(t('Test-False'), $view->field['age']->advancedRender($view->result[0]));
     $this->assertEqual(t('Test-True'), $view->field['age']->advancedRender($view->result[1]));
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldCounterTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldCounterTest.php
index 12f68ede749a446d147d619d5b78aea1dbd2b391..49d914eee45e2c579ba5b659f13cdfdcd24c4ef2 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldCounterTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldCounterTest.php
@@ -17,71 +17,71 @@ class FieldCounterTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user');
+  public static $modules = ['user'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   function testSimple() {
     $view = Views::getView('test_view');
     $view->setDisplay();
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'counter' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'counter' => [
         'id' => 'counter',
         'table' => 'views',
         'field' => 'counter',
         'relationship' => 'none',
-      ),
-      'name' => array(
+      ],
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
     $view->preview();
 
     $counter = $view->style_plugin->getField(0, 'counter');
-    $this->assertEqual($counter, '1', format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', array('@expected' => 1, '@counter' => $counter)));
+    $this->assertEqual($counter, '1', format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', ['@expected' => 1, '@counter' => $counter]));
     $counter = $view->style_plugin->getField(1, 'counter');
-    $this->assertEqual($counter, '2', format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', array('@expected' => 2, '@counter' => $counter)));
+    $this->assertEqual($counter, '2', format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', ['@expected' => 2, '@counter' => $counter]));
     $counter = $view->style_plugin->getField(2, 'counter');
-    $this->assertEqual($counter, '3', format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', array('@expected' => 3, '@counter' => $counter)));
+    $this->assertEqual($counter, '3', format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', ['@expected' => 3, '@counter' => $counter]));
     $view->destroy();
     $view->storage->invalidateCaches();
 
     $view->setDisplay();
     $rand_start = rand(5, 10);
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'counter' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'counter' => [
         'id' => 'counter',
         'table' => 'views',
         'field' => 'counter',
         'relationship' => 'none',
         'counter_start' => $rand_start
-      ),
-      'name' => array(
+      ],
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
     $view->preview();
 
     $counter = $view->style_plugin->getField(0, 'counter');
     $expected_number = 0 + $rand_start;
-    $this->assertEqual($counter, (string) $expected_number, format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', array('@expected' => $expected_number, '@counter' => $counter)));
+    $this->assertEqual($counter, (string) $expected_number, format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', ['@expected' => $expected_number, '@counter' => $counter]));
     $counter = $view->style_plugin->getField(1, 'counter');
     $expected_number = 1 + $rand_start;
-    $this->assertEqual($counter, (string) $expected_number, format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', array('@expected' => $expected_number, '@counter' => $counter)));
+    $this->assertEqual($counter, (string) $expected_number, format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', ['@expected' => $expected_number, '@counter' => $counter]));
     $counter = $view->style_plugin->getField(2, 'counter');
     $expected_number = 2 + $rand_start;
-    $this->assertEqual($counter, (string) $expected_number, format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', array('@expected' => $expected_number, '@counter' => $counter)));
+    $this->assertEqual($counter, (string) $expected_number, format_string('Make sure the expected number (@expected) patches with the rendered number (@counter)', ['@expected' => $expected_number, '@counter' => $counter]));
   }
 
   /**
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldCustomTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldCustomTest.php
index af7bc1bc890e5d55885d9fbb11c0c650c8221a76..fb6e3c4db69ffcfb44296374ab6710399cb51365 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldCustomTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldCustomTest.php
@@ -18,7 +18,7 @@ class FieldCustomTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * {@inheritdoc}
@@ -38,17 +38,17 @@ public function testFieldCustom() {
 
     // Alter the text of the field to a random string.
     $random = '<div>' . $this->randomMachineName() . '</div>';
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
-        'alter' => array(
+        'alter' => [
           'text' => $random,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     $this->executeView($view);
 
@@ -98,17 +98,17 @@ public function testCustomFieldXss() {
 
     // Alter the text of the field to include XSS.
     $text = '<script>alert("kittens")</script>';
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
-        'alter' => array(
+        'alter' => [
           'text' => $text,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $this->executeView($view);
     $this->assertEqual(Xss::filter($text), $view->style_plugin->getField(0, 'name'));
   }
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldDateTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldDateTest.php
index cb30bf7f6a068cfecce4fc4505bad959a4604209..833b5c99d193f579cba1c71fe21b5247cf4b6153 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldDateTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldDateTest.php
@@ -17,20 +17,20 @@ class FieldDateTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * {@inheritdoc}
    */
   public function schemaDefinition() {
     $schema = parent::schemaDefinition();
-    $schema['views_test_data']['fields']['destroyed'] = array(
+    $schema['views_test_data']['fields']['destroyed'] = [
       'description' => "The destruction date of this record",
       'type' => 'int',
       'unsigned' => TRUE,
       'not null' => FALSE,
       'default' => 0,
-    );
+    ];
     return $schema;
   }
 
@@ -40,14 +40,14 @@ public function schemaDefinition() {
   public function viewsData() {
     $data = parent::viewsData();
     $data['views_test_data']['created']['field']['id'] = 'date';
-    $data['views_test_data']['destroyed'] = array(
+    $data['views_test_data']['destroyed'] = [
       'title' => 'Destroyed',
       'help' => 'Date in future this will be destroyed.',
-      'field' => array('id' => 'date'),
-      'argument' => array('id' => 'date'),
-      'filter' => array('id' => 'date'),
-      'sort' => array('id' => 'date'),
-    );
+      'field' => ['id' => 'date'],
+      'argument' => ['id' => 'date'],
+      'filter' => ['id' => 'date'],
+      'sort' => ['id' => 'date'],
+    ];
     return $data;
   }
 
@@ -69,36 +69,36 @@ public function testFieldDate() {
     $view = Views::getView('test_view');
     $view->setDisplay();
 
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'created' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'created' => [
         'id' => 'created',
         'table' => 'views_test_data',
         'field' => 'created',
         'relationship' => 'none',
         // ISO 8601 format, see http://php.net/manual/function.date.php
         'custom_date_format' => 'c',
-      ),
-      'destroyed' => array(
+      ],
+      'destroyed' => [
         'id' => 'destroyed',
         'table' => 'views_test_data',
         'field' => 'destroyed',
         'relationship' => 'none',
         'custom_date_format' => 'c',
-      ),
-    ));
+      ],
+    ]);
     $time = gmmktime(0, 0, 0, 1, 1, 2000);
 
     $this->executeView($view);
 
-    $timezones = array(
+    $timezones = [
       NULL,
       'UTC',
       'America/New_York',
-    );
+    ];
 
     // Check each date/time in various timezones.
     foreach ($timezones as $timezone) {
-      $dates = array(
+      $dates = [
         'short' => format_date($time, 'short', '', $timezone),
         'medium' => format_date($time, 'medium', '', $timezone),
         'long' => format_date($time, 'long', '', $timezone),
@@ -111,30 +111,30 @@ public function testFieldDate() {
         'html_week' => format_date($time, 'html_week', '', $timezone),
         'html_year' => format_date($time, 'html_year', '', $timezone),
         'html_yearless_date' => format_date($time, 'html_yearless_date', '', $timezone),
-      );
+      ];
       $this->assertRenderedDatesEqual($view, $dates, $timezone);
     }
 
     // Check times in the past.
     $time_since = $this->container->get('date.formatter')->formatTimeDiffSince($time);
-    $intervals = array(
+    $intervals = [
       'raw time ago' => $time_since,
-      'time ago' => t('%time ago', array('%time' => $time_since)),
+      'time ago' => t('%time ago', ['%time' => $time_since]),
       'raw time span' => $time_since,
       'inverse time span' => "-$time_since",
-      'time span' => t('%time ago', array('%time' => $time_since)),
-    );
+      'time span' => t('%time ago', ['%time' => $time_since]),
+    ];
     $this->assertRenderedDatesEqual($view, $intervals);
 
     // Check times in the future.
     $time = gmmktime(0, 0, 0, 1, 1, 2050);
     $formatted = $this->container->get('date.formatter')->formatTimeDiffUntil($time);
-    $intervals = array(
+    $intervals = [
       'raw time span' => "-$formatted",
-      'time span' => t('%time hence', array(
+      'time span' => t('%time hence', [
         '%time' => $formatted,
-      )),
-    );
+      ]),
+    ];
     $this->assertRenderedFutureDatesEqual($view, $intervals);
   }
 
@@ -151,10 +151,10 @@ public function testFieldDate() {
   protected function assertRenderedDatesEqual($view, $map, $timezone = NULL) {
     foreach ($map as $date_format => $expected_result) {
       $view->field['created']->options['date_format'] = $date_format;
-      $t_args = array(
+      $t_args = [
         '%value' => $expected_result,
         '%format' => $date_format,
-      );
+      ];
       if (isset($timezone)) {
         $t_args['%timezone'] = $timezone;
         $message = t('Value %value in %format format for timezone %timezone matches.', $t_args);
@@ -180,11 +180,11 @@ protected function assertRenderedFutureDatesEqual($view, $map) {
     foreach ($map as $format => $result) {
       $view->field['destroyed']->options['date_format'] = $format;
       $view_result = $view->field['destroyed']->advancedRender($view->result[0]);
-      $t_args = array(
+      $t_args = [
         '%value' => $result,
         '%format' => $format,
         '%actual' => $view_result,
-      );
+      ];
       $message = t('Value %value in %format matches %actual', $t_args);
       $this->assertEqual($view_result, $result, $message);
     }
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldEntityLinkTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldEntityLinkTest.php
index 8f53f6a361f76a0005c96f21f5446c42fea2ef79..874f03d4fccf7e806f393d7b80d4a06fcf634287 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldEntityLinkTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldEntityLinkTest.php
@@ -23,14 +23,14 @@ class FieldEntityLinkTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_entity_test_link');
+  public static $testViews = ['test_entity_test_link'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('user', 'entity_test');
+  public static $modules = ['user', 'entity_test'];
 
   /**
    * An admin user account.
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldFieldTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldFieldTest.php
index c82fc69380628635004082216073b56ed499908b..1d304f53a19244e4ccf58c0015f90652d3f3c1ce 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldFieldTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldFieldTest.php
@@ -70,7 +70,7 @@ protected function setUp($import_test_views = TRUE) {
     $this->installEntitySchema('entity_test');
     $this->installEntitySchema('entity_test_rev');
 
-    ViewTestData::createTestViews(get_class($this), array('views_test_config'));
+    ViewTestData::createTestViews(get_class($this), ['views_test_config']);
 
     // Bypass any field access.
     $this->adminUser = User::create(['name' => $this->randomString()]);
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldFileSizeTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldFileSizeTest.php
index 2f60e34bf765a2a00a03d5b6a5b101dde59da3ad..7af6442e480a7b34b5809ed8e19963dcc8bd678a 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldFileSizeTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldFileSizeTest.php
@@ -18,7 +18,7 @@ class FieldFileSizeTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   function dataSet() {
     $data = parent::dataSet();
@@ -41,13 +41,13 @@ public function testFieldFileSize() {
     $view = Views::getView('test_view');
     $view->setDisplay();
 
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldKernelTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldKernelTest.php
index be8a4f1331bb6362d0ce3d97e2bfa7e2a5480073..b5b04b00dd52fb73e72be1553e65e58a57351f7f 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldKernelTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldKernelTest.php
@@ -15,23 +15,23 @@
  */
 class FieldKernelTest extends ViewsKernelTestBase {
 
-  public static $modules = array('user');
+  public static $modules = ['user'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'test_field_tokens', 'test_field_argument_tokens', 'test_field_output');
+  public static $testViews = ['test_view', 'test_field_tokens', 'test_field_argument_tokens', 'test_field_output'];
 
   /**
    * Map column names.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_name' => 'name',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -73,7 +73,7 @@ public function testQuery() {
     $id_field = $view->field['id'];
     $id_field->additional_fields['job'] = 'job';
     // Choose also a field alias key which doesn't match to the table field.
-    $id_field->additional_fields['created_test'] = array('table' => 'views_test_data', 'field' => 'created');
+    $id_field->additional_fields['created_test'] = ['table' => 'views_test_data', 'field' => 'created'];
     $view->build();
 
     // Make sure the field aliases have the expected value.
@@ -778,10 +778,10 @@ function testIsValueEmpty() {
    */
   public function testClickSortable() {
     // Test that clickSortable is TRUE by default.
-    $item = array(
+    $item = [
       'table' => 'views_test_data',
       'field' => 'name',
-    );
+    ];
     $plugin = $this->container->get('plugin.manager.views.field')->getHandler($item);
     $this->assertTrue($plugin->clickSortable(), 'TRUE as a default value is correct.');
 
@@ -801,7 +801,7 @@ public function testClickSortable() {
    */
   public function testTrimText() {
     // Test unicode. See https://www.drupal.org/node/513396#comment-2839416.
-    $text = array(
+    $text = [
       'Tuy nhiên, những hi vọng',
       'Giả sử chúng tôi có 3 Apple',
       'siêu nhỏ này là bộ xử lý',
@@ -810,12 +810,12 @@ public function testTrimText() {
       'của hãng bao gồm ba dòng',
       'сд асд асд ас',
       'асд асд асд ас'
-    );
+    ];
     // Just test maxlength without word boundary.
-    $alter = array(
+    $alter = [
       'max_length' => 10,
-    );
-    $expect = array(
+    ];
+    $expect = [
       'Tuy nhiên,',
       'Giả sử chú',
       'siêu nhỏ n',
@@ -824,7 +824,7 @@ public function testTrimText() {
       'của hãng b',
       'сд асд асд',
       'асд асд ас',
-    );
+    ];
 
     foreach ($text as $key => $line) {
       $result_text = FieldPluginBase::trimText($alter, $line);
@@ -833,7 +833,7 @@ public function testTrimText() {
 
     // Test also word_boundary
     $alter['word_boundary'] = TRUE;
-    $expect = array(
+    $expect = [
       'Tuy nhiên',
       'Giả sử',
       'siêu nhỏ',
@@ -842,7 +842,7 @@ public function testTrimText() {
       'của hãng',
       'сд асд',
       'асд асд',
-    );
+    ];
 
     foreach ($text as $key => $line) {
       $result_text = FieldPluginBase::trimText($alter, $line);
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldUrlTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldUrlTest.php
index bfb764d4fa58f76e64c855255e1e16fcb87719f5..828fdb4fdf1f0b2e3c4f4d7053bf1c181fcb645d 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldUrlTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldUrlTest.php
@@ -13,14 +13,14 @@
  */
 class FieldUrlTest extends ViewsKernelTestBase {
 
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   function viewsData() {
     $data = parent::viewsData();
@@ -32,15 +32,15 @@ public function testFieldUrl() {
     $view = Views::getView('test_view');
     $view->setDisplay();
 
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'display_as_link' => FALSE,
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
@@ -50,14 +50,14 @@ public function testFieldUrl() {
     $view->destroy();
     $view->setDisplay();
 
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/FilterBooleanOperatorStringTest.php b/core/modules/views/tests/src/Kernel/Handler/FilterBooleanOperatorStringTest.php
index 5bd2157afa3e1647aaea7e9f12dacf91482b5132..325da5106e2762308c2a486fb10064bf00fbe77c 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FilterBooleanOperatorStringTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FilterBooleanOperatorStringTest.php
@@ -19,23 +19,23 @@ class FilterBooleanOperatorStringTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Map column names.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_id' => 'id',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -43,13 +43,13 @@ class FilterBooleanOperatorStringTest extends ViewsKernelTestBase {
   protected function schemaDefinition() {
     $schema = parent::schemaDefinition();
 
-    $schema['views_test_data']['fields']['status'] = array(
+    $schema['views_test_data']['fields']['status'] = [
       'description' => 'The status of this record',
       'type' => 'varchar',
       'length' => 255,
       'not null' => TRUE,
       'default' => '',
-    );
+    ];
 
     return $schema;
   }
@@ -91,20 +91,20 @@ public function testFilterBooleanOperatorString() {
     $view->setDisplay();
 
     // Add a the status boolean filter.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'status' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'status' => [
         'id' => 'status',
         'field' => 'status',
         'table' => 'views_test_data',
         'value' => 0,
-      ),
-    ));
+      ],
+    ]);
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 2),
-      array('id' => 4),
-    );
+    $expected_result = [
+      ['id' => 2],
+      ['id' => 4],
+    ];
 
     $this->assertEqual(2, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -113,21 +113,21 @@ public function testFilterBooleanOperatorString() {
     $view->setDisplay();
 
     // Add the status boolean filter.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'status' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'status' => [
         'id' => 'status',
         'field' => 'status',
         'table' => 'views_test_data',
         'value' => 1,
-      ),
-    ));
+      ],
+    ]);
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 1),
-      array('id' => 3),
-      array('id' => 5),
-    );
+    $expected_result = [
+      ['id' => 1],
+      ['id' => 3],
+      ['id' => 5],
+    ];
 
     $this->assertEqual(3, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -140,32 +140,32 @@ public function testFilterGroupedExposed() {
     $filters = $this->getGroupedExposedFilters();
     $view = Views::getView('test_view');
 
-    $view->setExposedInput(array('status' => 1));
+    $view->setExposedInput(['status' => 1]);
     $view->setDisplay();
     $view->displayHandlers->get('default')->overrideOption('filters', $filters);
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 1),
-      array('id' => 3),
-      array('id' => 5),
-    );
+    $expected_result = [
+      ['id' => 1],
+      ['id' => 3],
+      ['id' => 5],
+    ];
 
     $this->assertEqual(3, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
     $view->destroy();
 
-    $view->setExposedInput(array('status' => 2));
+    $view->setExposedInput(['status' => 2]);
     $view->setDisplay();
     $view->displayHandlers->get('default')->overrideOption('filters', $filters);
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 2),
-      array('id' => 4),
-    );
+    $expected_result = [
+      ['id' => 2],
+      ['id' => 4],
+    ];
 
     $this->assertEqual(2, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -178,38 +178,38 @@ public function testFilterGroupedExposed() {
    *   Returns the filter configuration for exposed filters.
    */
   protected function getGroupedExposedFilters() {
-    $filters = array(
-      'status' => array(
+    $filters = [
+      'status' => [
         'id' => 'status',
         'table' => 'views_test_data',
         'field' => 'status',
         'relationship' => 'none',
         'exposed' => TRUE,
-        'expose' => array(
+        'expose' => [
           'operator' => 'status_op',
           'label' => 'status',
           'identifier' => 'status',
-        ),
+        ],
         'is_grouped' => TRUE,
-        'group_info' => array(
+        'group_info' => [
           'label' => 'status',
           'identifier' => 'status',
           'default_group' => 'All',
-          'group_items' => array(
-            1 => array(
+          'group_items' => [
+            1 => [
               'title' => 'Active',
               'operator' => '=',
               'value' => '1',
-            ),
-            2 => array(
+            ],
+            2 => [
               'title' => 'Blocked',
               'operator' => '=',
               'value' => '0',
-            ),
-          ),
-        ),
-      ),
-    );
+            ],
+          ],
+        ],
+      ],
+    ];
     return $filters;
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/FilterBooleanOperatorTest.php b/core/modules/views/tests/src/Kernel/Handler/FilterBooleanOperatorTest.php
index 7a88066e8819d6c6d39b46a75d7eb06d5f455bbc..7cdd41f525d1369ebd0f62fb363c781c25dd0e2b 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FilterBooleanOperatorTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FilterBooleanOperatorTest.php
@@ -18,23 +18,23 @@ class FilterBooleanOperatorTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Map column names.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_id' => 'id',
-  );
+  ];
 
   /**
    * Tests the BooleanOperator filter.
@@ -44,20 +44,20 @@ public function testFilterBooleanOperator() {
     $view->setDisplay();
 
     // Add a the status boolean filter.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'status' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'status' => [
         'id' => 'status',
         'field' => 'status',
         'table' => 'views_test_data',
         'value' => 0,
-      ),
-    ));
+      ],
+    ]);
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 2),
-      array('id' => 4),
-    );
+    $expected_result = [
+      ['id' => 2],
+      ['id' => 4],
+    ];
 
     $this->assertEqual(2, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -66,21 +66,21 @@ public function testFilterBooleanOperator() {
     $view->setDisplay();
 
     // Add the status boolean filter.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'status' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'status' => [
         'id' => 'status',
         'field' => 'status',
         'table' => 'views_test_data',
         'value' => 1,
-      ),
-    ));
+      ],
+    ]);
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 1),
-      array('id' => 3),
-      array('id' => 5),
-    );
+    $expected_result = [
+      ['id' => 1],
+      ['id' => 3],
+      ['id' => 5],
+    ];
 
     $this->assertEqual(3, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -89,22 +89,22 @@ public function testFilterBooleanOperator() {
     $view->setDisplay();
 
     // Testing the same scenario but using the reverse status and operation.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'status' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'status' => [
         'id' => 'status',
         'field' => 'status',
         'table' => 'views_test_data',
         'value' => 0,
         'operator' => '!=',
-      ),
-    ));
+      ],
+    ]);
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 1),
-      array('id' => 3),
-      array('id' => 5),
-    );
+    $expected_result = [
+      ['id' => 1],
+      ['id' => 3],
+      ['id' => 5],
+    ];
 
     $this->assertEqual(3, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -117,32 +117,32 @@ public function testFilterGroupedExposed() {
     $filters = $this->getGroupedExposedFilters();
     $view = Views::getView('test_view');
 
-    $view->setExposedInput(array('status' => 1));
+    $view->setExposedInput(['status' => 1]);
     $view->setDisplay();
     $view->displayHandlers->get('default')->overrideOption('filters', $filters);
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 1),
-      array('id' => 3),
-      array('id' => 5),
-    );
+    $expected_result = [
+      ['id' => 1],
+      ['id' => 3],
+      ['id' => 5],
+    ];
 
     $this->assertEqual(3, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
     $view->destroy();
 
-    $view->setExposedInput(array('status' => 2));
+    $view->setExposedInput(['status' => 2]);
     $view->setDisplay();
     $view->displayHandlers->get('default')->overrideOption('filters', $filters);
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 2),
-      array('id' => 4),
-    );
+    $expected_result = [
+      ['id' => 2],
+      ['id' => 4],
+    ];
 
     $this->assertEqual(2, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -156,11 +156,11 @@ public function testFilterGroupedExposed() {
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array('id' => 1),
-      array('id' => 3),
-      array('id' => 5),
-    );
+    $expected_result = [
+      ['id' => 1],
+      ['id' => 3],
+      ['id' => 5],
+    ];
 
     $this->assertEqual(3, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -172,45 +172,45 @@ public function testFilterGroupedExposed() {
    * @return array
    */
   protected function getGroupedExposedFilters() {
-    $filters = array(
-      'status' => array(
+    $filters = [
+      'status' => [
         'id' => 'status',
         'table' => 'views_test_data',
         'field' => 'status',
         'relationship' => 'none',
         'exposed' => TRUE,
-        'expose' => array(
+        'expose' => [
           'operator' => 'status_op',
           'label' => 'status',
           'identifier' => 'status',
-        ),
+        ],
         'is_grouped' => TRUE,
-        'group_info' => array(
+        'group_info' => [
           'label' => 'status',
           'identifier' => 'status',
           'default_group' => 'All',
-          'group_items' => array(
-            1 => array(
+          'group_items' => [
+            1 => [
               'title' => 'Active',
               'operator' => '=',
               'value' => '1',
-            ),
-            2 => array(
+            ],
+            2 => [
               'title' => 'Blocked',
               'operator' => '=',
               'value' => '0',
-            ),
+            ],
             // This group should return the same results as group 1, because it
             // is the negation of group 2.
-            3 => array(
+            3 => [
               'title' => 'Active (reverse)',
               'operator' => '!=',
               'value' => '0',
-            ),
-          ),
-        ),
-      ),
-    );
+            ],
+          ],
+        ],
+      ],
+    ];
     return $filters;
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/FilterCombineTest.php b/core/modules/views/tests/src/Kernel/Handler/FilterCombineTest.php
index 0424263833d5271f9967b4124260aee8a4b8bb5b..e5d37119df0bcb1301d648cf5be687a418a88958 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FilterCombineTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FilterCombineTest.php
@@ -15,24 +15,24 @@ class FilterCombineTest extends ViewsKernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('entity_test');
+  public static $modules = ['entity_test'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'entity_test_fields');
+  public static $testViews = ['test_view', 'entity_test_fields'];
 
   /**
    * Map column names.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_name' => 'name',
     'views_test_data_job' => 'job',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -48,50 +48,50 @@ public function testFilterCombineContains() {
     $view->setDisplay();
 
     $fields = $view->displayHandlers->get('default')->getOption('fields');
-    $view->displayHandlers->get('default')->overrideOption('fields', $fields + array(
-      'job' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', $fields + [
+      'job' => [
         'id' => 'job',
         'table' => 'views_test_data',
         'field' => 'job',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'combine',
         'table' => 'views',
         'field' => 'combine',
         'relationship' => 'none',
         'operator' => 'contains',
-        'fields' => array(
+        'fields' => [
           'name',
           'job',
-        ),
+        ],
         'value' => 'ing',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
         'job' => 'Singer',
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
         'job' => 'Singer',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'job' => 'Drummer',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ginger',
         'job' => NULL,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -103,46 +103,46 @@ public function testFilterCombineWord() {
     $view->setDisplay();
 
     $fields = $view->displayHandlers->get('default')->getOption('fields');
-    $view->displayHandlers->get('default')->overrideOption('fields', $fields + array(
-        'job' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', $fields + [
+        'job' => [
           'id' => 'job',
           'table' => 'views_test_data',
           'field' => 'job',
           'relationship' => 'none',
-        ),
-      ));
+        ],
+      ]);
 
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'combine',
         'table' => 'views',
         'field' => 'combine',
         'relationship' => 'none',
         'operator' => 'word',
-        'fields' => array(
+        'fields' => [
           'name',
           'job',
-        ),
+        ],
         'value' => 'singer ringo',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
         'job' => 'Singer',
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
         'job' => 'Singer',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'job' => 'Drummer',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -154,39 +154,39 @@ public function testFilterCombineAllWords() {
     $view->setDisplay();
 
     $fields = $view->displayHandlers->get('default')->getOption('fields');
-    $view->displayHandlers->get('default')->overrideOption('fields', $fields + array(
-        'job' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', $fields + [
+        'job' => [
           'id' => 'job',
           'table' => 'views_test_data',
           'field' => 'job',
           'relationship' => 'none',
-        ),
-      ));
+        ],
+      ]);
 
     // Set the filtering to allwords and simulate searching for a phrase.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'combine',
         'table' => 'views',
         'field' => 'combine',
         'relationship' => 'none',
         'operator' => 'allwords',
-        'fields' => array(
+        'fields' => [
           'name',
           'job',
           'age',
-        ),
+        ],
         'value' => '25 "john   singer"',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
         'job' => 'Singer',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -202,40 +202,40 @@ public function testFilterCombineContainsFieldsOverwritten() {
     $view->setDisplay();
 
     $fields = $view->displayHandlers->get('default')->getOption('fields');
-    $view->displayHandlers->get('default')->overrideOption('fields', $fields + array(
-      'job' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', $fields + [
+      'job' => [
         'id' => 'job',
         'table' => 'views_test_data',
         'field' => 'job',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'combine',
         'table' => 'views',
         'field' => 'combine',
         'relationship' => 'none',
         'operator' => 'contains',
-        'fields' => array(
+        'fields' => [
           'name',
           'job',
           // Add a dummy field to the combined fields to simulate
           // a removed or deleted field.
           'dummy',
-        ),
+        ],
         'value' => 'ing',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
     // Make sure this view will not get displayed.
     $this->assertTrue($view->build_info['fail'], "View build has been marked as failed.");
     // Make sure this view does not pass validation with the right error.
     $errors = $view->validate();
-    $this->assertEquals(t('Field %field set in %filter is not set in display %display.', array('%field' => 'dummy', '%filter' => 'Global: Combine fields filter', '%display' => 'Master')), reset($errors['default']));
+    $this->assertEquals(t('Field %field set in %filter is not set in display %display.', ['%field' => 'dummy', '%filter' => 'Global: Combine fields filter', '%display' => 'Master']), reset($errors['default']));
   }
 
   /**
@@ -247,30 +247,30 @@ public function testNonFieldsRow() {
     $view->setDisplay();
 
     // Set the rows to a plugin type that doesn't support fields.
-    $view->displayHandlers->get('default')->overrideOption('row', array(
+    $view->displayHandlers->get('default')->overrideOption('row', [
       'type' => 'entity:entity_test',
-      'options' => array(
+      'options' => [
         'view_mode' => 'teaser',
-      ),
-    ));
+      ],
+    ]);
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'name' => [
         'id' => 'combine',
         'table' => 'views',
         'field' => 'combine',
         'relationship' => 'none',
         'operator' => 'contains',
-        'fields' => array(
+        'fields' => [
           'name',
-        ),
+        ],
         'value' => 'ing',
-      ),
-    ));
+      ],
+    ]);
     $this->executeView($view);
     $errors = $view->validate();
     // Check that the right error is shown.
-    $this->assertEquals(t('%display: %filter can only be used on displays that use fields. Set the style or row format for that display to one using fields to use the combine field filter.', array('%filter' => 'Global: Combine fields filter', '%display' => 'Master')), reset($errors['default']));
+    $this->assertEquals(t('%display: %filter can only be used on displays that use fields. Set the style or row format for that display to one using fields to use the combine field filter.', ['%filter' => 'Global: Combine fields filter', '%display' => 'Master']), reset($errors['default']));
   }
 
   /**
@@ -278,13 +278,13 @@ public function testNonFieldsRow() {
    */
   protected function dataSet() {
     $data_set = parent::dataSet();
-    $data_set[] = array(
+    $data_set[] = [
       'name' => 'Ginger',
       'age' => 25,
       'job' => NULL,
       'created' => gmmktime(0, 0, 0, 1, 2, 2000),
       'status' => 1,
-    );
+    ];
     return $data_set;
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/FilterEqualityTest.php b/core/modules/views/tests/src/Kernel/Handler/FilterEqualityTest.php
index a4bd6c840805b2e1a28eb5127a6abb3cbbd2e41b..41002e806c3437b9b181f3c37c0a487bf58e3b8c 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FilterEqualityTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FilterEqualityTest.php
@@ -12,23 +12,23 @@
  */
 class FilterEqualityTest extends ViewsKernelTestBase {
 
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Map column names.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_name' => 'name',
-  );
+  ];
 
   function viewsData() {
     $data = parent::viewsData();
@@ -41,23 +41,23 @@ function testEqual() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'operator' => '=',
         'value' => 'Ringo',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -74,11 +74,11 @@ public function testEqualGroupedExposed() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -87,32 +87,32 @@ function testNotEqual() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'operator' => '!=',
         'value' => 'Ringo',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -129,27 +129,27 @@ public function testEqualGroupedNotExposed() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
 
   protected function getGroupedExposedFilters() {
-    $filters = array(
-      'name' => array(
+    $filters = [
+      'name' => [
         'id' => 'name',
         'plugin_id' => 'equality',
         'table' => 'views_test_data',
@@ -157,31 +157,31 @@ protected function getGroupedExposedFilters() {
         'relationship' => 'none',
         'group' => 1,
         'exposed' => TRUE,
-        'expose' => array(
+        'expose' => [
           'operator' => 'name_op',
           'label' => 'name',
           'identifier' => 'name',
-        ),
+        ],
         'is_grouped' => TRUE,
-        'group_info' => array(
+        'group_info' => [
           'label' => 'name',
           'identifier' => 'name',
           'default_group' => 'All',
-          'group_items' => array(
-            1 => array(
+          'group_items' => [
+            1 => [
               'title' => 'Name is equal to Ringo',
               'operator' => '=',
               'value' => 'Ringo',
-            ),
-            2 => array(
+            ],
+            2 => [
               'title' => 'Name is not equal to Ringo',
               'operator' => '!=',
               'value' => 'Ringo',
-            ),
-          ),
-        ),
-      ),
-    );
+            ],
+          ],
+        ],
+      ],
+    ];
     return $filters;
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/FilterInOperatorTest.php b/core/modules/views/tests/src/Kernel/Handler/FilterInOperatorTest.php
index 9ab08e1c467fc8c21b2a8f50f5225bcc0bd5ae62..b542c9c1dad1cd7c1acefc1ced426479e1b8ec7f 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FilterInOperatorTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FilterInOperatorTest.php
@@ -12,24 +12,24 @@
  */
 class FilterInOperatorTest extends ViewsKernelTestBase {
 
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Map column names.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_name' => 'name',
     'views_test_data_age' => 'age',
-  );
+  ];
 
   function viewsData() {
     $data = parent::viewsData();
@@ -42,28 +42,28 @@ public function testFilterInOperatorSimple() {
     $view->setDisplay();
 
     // Add a in_operator ordering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'age',
         'field' => 'age',
         'table' => 'views_test_data',
-        'value' => array(26, 30),
+        'value' => [26, 30],
         'operator' => 'in',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'name' => 'Paul',
         'age' => 26,
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
         'age' => 30,
-      ),
-    );
+      ],
+    ];
 
     $this->assertEqual(2, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -72,32 +72,32 @@ public function testFilterInOperatorSimple() {
     $view->setDisplay();
 
     // Add a in_operator ordering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'age',
         'field' => 'age',
         'table' => 'views_test_data',
-        'value' => array(26, 30),
+        'value' => [26, 30],
         'operator' => 'not in',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'name' => 'John',
         'age' => 25,
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
         'age' => 27,
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-    );
+      ],
+    ];
 
     $this->assertEqual(3, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -114,16 +114,16 @@ public function testFilterInOperatorGroupedExposedSimple() {
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'name' => 'Paul',
         'age' => 26,
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
         'age' => 30,
-      ),
-    );
+      ],
+    ];
 
     $this->assertEqual(2, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
@@ -140,58 +140,58 @@ public function testFilterNotInOperatorGroupedExposedSimple() {
 
     $this->executeView($view);
 
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'name' => 'John',
         'age' => 25,
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
         'age' => 27,
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-    );
+      ],
+    ];
 
     $this->assertEqual(3, count($view->result));
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
   }
 
   protected function getGroupedExposedFilters() {
-    $filters = array(
-      'age' => array(
+    $filters = [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'exposed' => TRUE,
-        'expose' => array(
+        'expose' => [
           'operator' => 'age_op',
           'label' => 'age',
           'identifier' => 'age',
-        ),
+        ],
         'is_grouped' => TRUE,
-        'group_info' => array(
+        'group_info' => [
           'label' => 'age',
           'identifier' => 'age',
           'default_group' => 'All',
-          'group_items' => array(
-            1 => array(
+          'group_items' => [
+            1 => [
               'title' => 'Age is one of 26, 30',
               'operator' => 'in',
-              'value' => array(26, 30),
-            ),
-            2 => array(
+              'value' => [26, 30],
+            ],
+            2 => [
               'title' => 'Age is not one of 26, 30',
               'operator' => 'not in',
-              'value' => array(26, 30),
-            ),
-          ),
-        ),
-      ),
-    );
+              'value' => [26, 30],
+            ],
+          ],
+        ],
+      ],
+    ];
     return $filters;
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/FilterNumericTest.php b/core/modules/views/tests/src/Kernel/Handler/FilterNumericTest.php
index ca1587913d023171f1b24dc5f7cf033c7ee88d1b..d10b792080638ed8d79f381a5b151e4a007b7d57 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FilterNumericTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FilterNumericTest.php
@@ -12,24 +12,24 @@
  */
 class FilterNumericTest extends ViewsKernelTestBase {
 
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Map column names.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_name' => 'name',
     'views_test_data_age' => 'age',
-  );
+  ];
 
   function viewsData() {
     $data = parent::viewsData();
@@ -44,24 +44,24 @@ public function testFilterNumericSimple() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'operator' => '=',
-        'value' => array('value' => 28),
-      ),
-    ));
+        'value' => ['value' => 28],
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -78,12 +78,12 @@ public function testFilterNumericExposedGroupedSimple() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -92,35 +92,35 @@ public function testFilterNumericBetween() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'operator' => 'between',
-        'value' => array(
+        'value' => [
           'min' => 26,
           'max' => 29,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
         'age' => 27,
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
         'age' => 26,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
 
     // test not between
@@ -128,31 +128,31 @@ public function testFilterNumericBetween() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'operator' => 'not between',
-        'value' => array(
+        'value' => [
           'min' => 26,
           'max' => 29,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
         'age' => 25,
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
         'age' => 30,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -169,20 +169,20 @@ public function testFilterNumericExposedGroupedBetween() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
         'age' => 27,
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
         'age' => 26,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -199,16 +199,16 @@ public function testFilterNumericExposedGroupedNotBetween() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
         'age' => 25,
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
         'age' => 30,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -220,26 +220,26 @@ public function testFilterNumericRegularExpression() {
     $view->setDisplay();
 
     // Filtering by regular expression pattern.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'operator' => 'regular_expression',
-        'value' => array(
+        'value' => [
           'value' => '2[8]',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -259,16 +259,16 @@ public function testFilterNumericExposedGroupedRegularExpression() {
     $view->save();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
         'age' => 27,
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -277,58 +277,58 @@ public function testFilterNumericEmpty() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'operator' => 'empty',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-    );
+    $resultset = [
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
 
     $view->destroy();
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'operator' => 'not empty',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-    array(
+    $resultset = [
+    [
         'name' => 'John',
         'age' => 25,
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
         'age' => 27,
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
         'age' => 26,
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
         'age' => 30,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -345,8 +345,8 @@ public function testFilterNumericExposedGroupedEmpty() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-    );
+    $resultset = [
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -363,28 +363,28 @@ public function testFilterNumericExposedGroupedNotEmpty() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-    array(
+    $resultset = [
+    [
         'name' => 'John',
         'age' => 25,
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
         'age' => 27,
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
         'age' => 28,
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
         'age' => 26,
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
         'age' => 30,
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -392,20 +392,20 @@ public function testAllowEmpty() {
     $view = Views::getView('test_view');
     $view->setDisplay();
 
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'id' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'id' => [
         'id' => 'id',
         'table' => 'views_test_data',
         'field' => 'id',
         'relationship' => 'none',
-      ),
-      'age' => array(
+      ],
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     $view->initHandlers();
 
@@ -419,65 +419,65 @@ public function testAllowEmpty() {
   }
 
   protected function getGroupedExposedFilters() {
-    $filters = array(
-      'age' => array(
+    $filters = [
+      'age' => [
         'id' => 'age',
         'plugin_id' => 'numeric',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'exposed' => TRUE,
-        'expose' => array(
+        'expose' => [
           'operator' => 'age_op',
           'label' => 'age',
           'identifier' => 'age',
-        ),
+        ],
         'is_grouped' => TRUE,
-        'group_info' => array(
+        'group_info' => [
           'label' => 'age',
           'identifier' => 'age',
           'default_group' => 'All',
-          'group_items' => array(
-            1 => array(
+          'group_items' => [
+            1 => [
               'title' => 'Age is 28',
               'operator' => '=',
-              'value' => array('value' => 28),
-            ),
-            2 => array(
+              'value' => ['value' => 28],
+            ],
+            2 => [
               'title' => 'Age is between 26 and 29',
               'operator' => 'between',
-              'value' => array(
+              'value' => [
                 'min' => 26,
                 'max' => 29,
-              ),
-            ),
-            3 => array(
+              ],
+            ],
+            3 => [
               'title' => 'Age is not between 26 and 29',
               'operator' => 'not between',
-              'value' => array(
+              'value' => [
                 'min' => 26,
                 'max' => 29,
-              ),
-            ),
-            4 => array(
+              ],
+            ],
+            4 => [
               'title' => 'Age is empty',
               'operator' => 'empty',
-            ),
-            5 => array(
+            ],
+            5 => [
               'title' => 'Age is not empty',
               'operator' => 'not empty',
-            ),
-            6 => array(
+            ],
+            6 => [
               'title' => 'Age is regexp 2[7-8]',
               'operator' => 'regular_expression',
-              'value' => array(
+              'value' => [
                 'value' => '2[7-8]',
-              ),
-            ),
-          ),
-        ),
-      ),
-    );
+              ],
+            ],
+          ],
+        ],
+      ],
+    ];
     return $filters;
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/FilterStringTest.php b/core/modules/views/tests/src/Kernel/Handler/FilterStringTest.php
index 5dd47ecb3b30ca3848efd4941d1658c4b4e9d175..c21df9a0f78652127a768d8530d47d18b2bc192a 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FilterStringTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FilterStringTest.php
@@ -12,23 +12,23 @@
  */
 class FilterStringTest extends ViewsKernelTestBase {
 
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Map column names.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_name' => 'name',
-  );
+  ];
 
   function viewsData() {
     $data = parent::viewsData();
@@ -41,12 +41,12 @@ function viewsData() {
 
   protected function schemaDefinition() {
     $schema = parent::schemaDefinition();
-    $schema['views_test_data']['fields']['description'] = array(
+    $schema['views_test_data']['fields']['description'] = [
       'description' => "A person's description",
       'type' => 'text',
       'not null' => FALSE,
       'size' => 'big',
-    );
+    ];
 
     return $schema;
   }
@@ -86,23 +86,23 @@ function testFilterStringEqual() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'operator' => '=',
         'value' => 'Ringo',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -119,11 +119,11 @@ function testFilterStringGroupedExposedEqual() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
 
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
@@ -133,32 +133,32 @@ function testFilterStringNotEqual() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'operator' => '!=',
         'value' => 'Ringo',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -176,20 +176,20 @@ function testFilterStringGroupedExposedNotEqual() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'George',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
-      array(
+      ],
+      [
         'name' => 'Meredith',
-      ),
-    );
+      ],
+    ];
 
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
@@ -199,23 +199,23 @@ function testFilterStringContains() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'operator' => 'contains',
         'value' => 'ing',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -233,11 +233,11 @@ function testFilterStringGroupedExposedContains() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
 
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
@@ -248,26 +248,26 @@ function testFilterStringWord() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'description' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'description' => [
         'id' => 'description',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'operator' => 'word',
         'value' => 'actor',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
     $view->destroy();
 
@@ -275,23 +275,23 @@ function testFilterStringWord() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'description' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'description' => [
         'id' => 'description',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'operator' => 'allwords',
         'value' => 'Richard Starkey',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -309,11 +309,11 @@ function testFilterStringGroupedExposedWord() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
 
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
     $view->destroy();
@@ -327,14 +327,14 @@ function testFilterStringGroupedExposedWord() {
     $view->displayHandlers->get('page_1')->overrideOption('filters', $filters);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -343,23 +343,23 @@ function testFilterStringStarts() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'description' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'description' => [
         'id' => 'description',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'operator' => 'starts',
         'value' => 'George',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -376,11 +376,11 @@ function testFilterStringGroupedExposedStarts() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -389,30 +389,30 @@ function testFilterStringNotStarts() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'description' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'description' => [
         'id' => 'description',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'operator' => 'not_starts',
         'value' => 'George',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
+      ],
       // There is no Meredith returned because his description is empty
-    );
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -429,18 +429,18 @@ function testFilterStringGroupedExposedNotStarts() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
+      ],
       // There is no Meredith returned because his description is empty
-    );
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -449,26 +449,26 @@ function testFilterStringEnds() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'description' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'description' => [
         'id' => 'description',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'operator' => 'ends',
         'value' => 'Beatles.',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -485,14 +485,14 @@ function testFilterStringGroupedExposedEnds() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'George',
-      ),
-      array(
+      ],
+      [
         'name' => 'Ringo',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -501,27 +501,27 @@ function testFilterStringNotEnds() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'description' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'description' => [
         'id' => 'description',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'operator' => 'not_ends',
         'value' => 'Beatles.',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
+      ],
       // There is no Meredith returned because his description is empty
-    );
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -538,15 +538,15 @@ function testFilterStringGroupedExposedNotEnds() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
+      ],
       // There is no Meredith returned because his description is empty
-    );
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -555,27 +555,27 @@ function testFilterStringNot() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'description' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'description' => [
         'id' => 'description',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'operator' => 'not',
         'value' => 'Beatles.',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
+      ],
       // There is no Meredith returned because his description is empty
-    );
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -593,15 +593,15 @@ function testFilterStringGroupedExposedNot() {
 
     $this->executeView($view);
 
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
+      ],
       // There is no Meredith returned because his description is empty
-    );
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
 
   }
@@ -611,26 +611,26 @@ function testFilterStringShorter() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'operator' => 'shorterthan',
         'value' => 5,
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -646,14 +646,14 @@ function testFilterStringGroupedExposedShorter() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'John',
-      ),
-      array(
+      ],
+      [
         'name' => 'Paul',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -662,23 +662,23 @@ function testFilterStringLonger() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'name' => [
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'operator' => 'longerthan',
         'value' => 7,
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Meredith',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -694,11 +694,11 @@ function testFilterStringGroupedExposedLonger() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Meredith',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -708,22 +708,22 @@ function testFilterStringEmpty() {
     $view->setDisplay();
 
     // Change the filtering
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'description' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'description' => [
         'id' => 'description',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'operator' => 'empty',
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Meredith',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
@@ -739,119 +739,119 @@ function testFilterStringGroupedExposedEmpty() {
     $this->container->get('router.builder')->rebuild();
 
     $this->executeView($view);
-    $resultset = array(
-      array(
+    $resultset = [
+      [
         'name' => 'Meredith',
-      ),
-    );
+      ],
+    ];
     $this->assertIdenticalResultset($view, $resultset, $this->columnMap);
   }
 
   protected function getGroupedExposedFilters() {
-    $filters = array(
-      'name' => array(
+    $filters = [
+      'name' => [
         'id' => 'name',
         'plugin_id' => 'string',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
         'exposed' => TRUE,
-        'expose' => array(
+        'expose' => [
           'operator' => 'name_op',
           'label' => 'name',
           'identifier' => 'name',
-        ),
+        ],
         'is_grouped' => TRUE,
-        'group_info' => array(
+        'group_info' => [
           'label' => 'name',
           'identifier' => 'name',
           'default_group' => 'All',
-          'group_items' => array(
-            1 => array(
+          'group_items' => [
+            1 => [
               'title' => 'Is Ringo',
               'operator' => '=',
               'value' => 'Ringo',
-            ),
-            2 => array(
+            ],
+            2 => [
               'title' => 'Is not Ringo',
               'operator' => '!=',
               'value' => 'Ringo',
-            ),
-            3 => array(
+            ],
+            3 => [
               'title' => 'Contains ing',
               'operator' => 'contains',
               'value' => 'ing',
-            ),
-            4 => array(
+            ],
+            4 => [
               'title' => 'Shorter than 5 letters',
               'operator' => 'shorterthan',
               'value' => 5,
-            ),
-            5 => array(
+            ],
+            5 => [
               'title' => 'Longer than 7 letters',
               'operator' => 'longerthan',
               'value' => 7,
-            ),
-          ),
-        ),
-      ),
-      'description' => array(
+            ],
+          ],
+        ],
+      ],
+      'description' => [
         'id' => 'description',
         'plugin_id' => 'string',
         'table' => 'views_test_data',
         'field' => 'description',
         'relationship' => 'none',
         'exposed' => TRUE,
-        'expose' => array(
+        'expose' => [
           'operator' => 'description_op',
           'label' => 'description',
           'identifier' => 'description',
-        ),
+        ],
         'is_grouped' => TRUE,
-        'group_info' => array(
+        'group_info' => [
           'label' => 'description',
           'identifier' => 'description',
           'default_group' => 'All',
-          'group_items' => array(
-            1 => array(
+          'group_items' => [
+            1 => [
               'title' => 'Contains the word: Actor',
               'operator' => 'word',
               'value' => 'actor',
-            ),
-            2 => array(
+            ],
+            2 => [
               'title' => 'Starts with George',
               'operator' => 'starts',
               'value' => 'George',
-            ),
-            3 => array(
+            ],
+            3 => [
               'title' => 'Not Starts with: George',
               'operator' => 'not_starts',
               'value' => 'George',
-            ),
-            4 => array(
+            ],
+            4 => [
               'title' => 'Ends with: Beatles',
               'operator' => 'ends',
               'value' => 'Beatles.',
-            ),
-            5 => array(
+            ],
+            5 => [
               'title' => 'Not Ends with: Beatles',
               'operator' => 'not_ends',
               'value' => 'Beatles.',
-            ),
-            6 => array(
+            ],
+            6 => [
               'title' => 'Does not contain: Beatles',
               'operator' => 'not',
               'value' => 'Beatles.',
-            ),
-            7 => array(
+            ],
+            7 => [
               'title' => 'Empty description',
               'operator' => 'empty',
               'value' => '',
-            ),
-          ),
-        ),
-      ),
-    );
+            ],
+          ],
+        ],
+      ],
+    ];
     return $filters;
   }
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/HandlerAliasTest.php b/core/modules/views/tests/src/Kernel/Handler/HandlerAliasTest.php
index 48f4e3d4900b35a245dbb96665ed382bf6ee9fc5..53d25b38e6a570cdb7c41a88b35f5d2679b61032 100644
--- a/core/modules/views/tests/src/Kernel/Handler/HandlerAliasTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/HandlerAliasTest.php
@@ -12,14 +12,14 @@
  */
 class HandlerAliasTest extends ViewsKernelTestBase {
 
-  public static $modules = array('user');
+  public static $modules = ['user'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_filter', 'test_alias');
+  public static $testViews = ['test_filter', 'test_alias'];
 
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
@@ -45,16 +45,16 @@ public function testPluginAliases() {
     $view->initDisplay();
 
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'test_filter' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'test_filter' => [
         'id' => 'test_filter',
         'table' => 'views_test_data_alias',
         'field' => 'name_alias',
         'operator' => '=',
         'value' => 'John',
         'group' => 0,
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
diff --git a/core/modules/views/tests/src/Kernel/Handler/SortDateTest.php b/core/modules/views/tests/src/Kernel/Handler/SortDateTest.php
index 4a137541125777c16ce42ee1926ec69c2dcd26bd..2d1a2fcc2fc217a3c811f5a7ec0630964b089599 100644
--- a/core/modules/views/tests/src/Kernel/Handler/SortDateTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/SortDateTest.php
@@ -18,123 +18,123 @@ class SortDateTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   protected function expectedResultSet($granularity, $reverse = TRUE) {
-    $expected = array();
+    $expected = [];
     if (!$reverse) {
       switch ($granularity) {
         case 'second':
-          $expected = array(
-            array('name' => 'John'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-            array('name' => 'Ringo'),
-            array('name' => 'George'),
-          );
+          $expected = [
+            ['name' => 'John'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+            ['name' => 'Ringo'],
+            ['name' => 'George'],
+          ];
           break;
         case 'minute':
-          $expected = array(
-            array('name' => 'John'),
-            array('name' => 'Paul'),
-            array('name' => 'Ringo'),
-            array('name' => 'Meredith'),
-            array('name' => 'George'),
-          );
+          $expected = [
+            ['name' => 'John'],
+            ['name' => 'Paul'],
+            ['name' => 'Ringo'],
+            ['name' => 'Meredith'],
+            ['name' => 'George'],
+          ];
           break;
         case 'hour':
-          $expected = array(
-            array('name' => 'John'),
-            array('name' => 'Ringo'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-            array('name' => 'George'),
-          );
+          $expected = [
+            ['name' => 'John'],
+            ['name' => 'Ringo'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+            ['name' => 'George'],
+          ];
           break;
         case 'day':
-          $expected = array(
-            array('name' => 'John'),
-            array('name' => 'Ringo'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-            array('name' => 'George'),
-          );
+          $expected = [
+            ['name' => 'John'],
+            ['name' => 'Ringo'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+            ['name' => 'George'],
+          ];
           break;
         case 'month':
-          $expected = array(
-            array('name' => 'John'),
-            array('name' => 'George'),
-            array('name' => 'Ringo'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-          );
+          $expected = [
+            ['name' => 'John'],
+            ['name' => 'George'],
+            ['name' => 'Ringo'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+          ];
           break;
         case 'year':
-          $expected = array(
-            array('name' => 'John'),
-            array('name' => 'George'),
-            array('name' => 'Ringo'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-          );
+          $expected = [
+            ['name' => 'John'],
+            ['name' => 'George'],
+            ['name' => 'Ringo'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+          ];
           break;
       }
     }
     else {
       switch ($granularity) {
         case 'second':
-          $expected = array(
-            array('name' => 'George'),
-            array('name' => 'Ringo'),
-            array('name' => 'Meredith'),
-            array('name' => 'Paul'),
-            array('name' => 'John'),
-          );
+          $expected = [
+            ['name' => 'George'],
+            ['name' => 'Ringo'],
+            ['name' => 'Meredith'],
+            ['name' => 'Paul'],
+            ['name' => 'John'],
+          ];
           break;
         case 'minute':
-          $expected = array(
-            array('name' => 'George'),
-            array('name' => 'Ringo'),
-            array('name' => 'Meredith'),
-            array('name' => 'Paul'),
-            array('name' => 'John'),
-           );
+          $expected = [
+            ['name' => 'George'],
+            ['name' => 'Ringo'],
+            ['name' => 'Meredith'],
+            ['name' => 'Paul'],
+            ['name' => 'John'],
+           ];
           break;
         case 'hour':
-          $expected = array(
-            array('name' => 'George'),
-            array('name' => 'Ringo'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-            array('name' => 'John'),
-          );
+          $expected = [
+            ['name' => 'George'],
+            ['name' => 'Ringo'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+            ['name' => 'John'],
+          ];
           break;
         case 'day':
-          $expected = array(
-            array('name' => 'George'),
-            array('name' => 'John'),
-            array('name' => 'Ringo'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-          );
+          $expected = [
+            ['name' => 'George'],
+            ['name' => 'John'],
+            ['name' => 'Ringo'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+          ];
           break;
         case 'month':
-          $expected = array(
-            array('name' => 'John'),
-            array('name' => 'George'),
-            array('name' => 'Ringo'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-          );
+          $expected = [
+            ['name' => 'John'],
+            ['name' => 'George'],
+            ['name' => 'Ringo'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+          ];
           break;
         case 'year':
-          $expected = array(
-            array('name' => 'John'),
-            array('name' => 'George'),
-            array('name' => 'Ringo'),
-            array('name' => 'Paul'),
-            array('name' => 'Meredith'),
-          );
+          $expected = [
+            ['name' => 'John'],
+            ['name' => 'George'],
+            ['name' => 'Ringo'],
+            ['name' => 'Paul'],
+            ['name' => 'Meredith'],
+          ];
           break;
       }
     }
@@ -146,54 +146,54 @@ protected function expectedResultSet($granularity, $reverse = TRUE) {
    * Tests numeric ordering of the result set.
    */
   public function testDateOrdering() {
-    foreach (array('second', 'minute', 'hour', 'day', 'month', 'year') as $granularity) {
-      foreach (array(FALSE, TRUE) as $reverse) {
+    foreach (['second', 'minute', 'hour', 'day', 'month', 'year'] as $granularity) {
+      foreach ([FALSE, TRUE] as $reverse) {
         $view = Views::getView('test_view');
         $view->setDisplay();
 
         // Change the fields.
-        $view->displayHandlers->get('default')->overrideOption('fields', array(
-          'name' => array(
+        $view->displayHandlers->get('default')->overrideOption('fields', [
+          'name' => [
             'id' => 'name',
             'table' => 'views_test_data',
             'field' => 'name',
             'relationship' => 'none',
-          ),
-          'created' => array(
+          ],
+          'created' => [
             'id' => 'created',
             'table' => 'views_test_data',
             'field' => 'created',
             'relationship' => 'none',
-          ),
-        ));
+          ],
+        ]);
 
         // Change the ordering
-        $view->displayHandlers->get('default')->overrideOption('sorts', array(
-          'created' => array(
+        $view->displayHandlers->get('default')->overrideOption('sorts', [
+          'created' => [
             'id' => 'created',
             'table' => 'views_test_data',
             'field' => 'created',
             'relationship' => 'none',
             'granularity' => $granularity,
             'order' => $reverse ? 'DESC' : 'ASC',
-          ),
-          'id' => array(
+          ],
+          'id' => [
             'id' => 'id',
             'table' => 'views_test_data',
             'field' => 'id',
             'relationship' => 'none',
             'order' => 'ASC',
-          ),
-        ));
+          ],
+        ]);
 
         // Execute the view.
         $this->executeView($view);
 
         // Verify the result.
         $this->assertEqual(count($this->dataSet()), count($view->result), 'The number of returned rows match.');
-        $this->assertIdenticalResultset($view, $this->expectedResultSet($granularity, $reverse), array(
+        $this->assertIdenticalResultset($view, $this->expectedResultSet($granularity, $reverse), [
           'views_test_data_name' => 'name',
-        ), SafeMarkup::format('Result is returned correctly when ordering by granularity @granularity, @reverse.', array('@granularity' => $granularity, '@reverse' => $reverse ? 'reverse' : 'forward')));
+        ], SafeMarkup::format('Result is returned correctly when ordering by granularity @granularity, @reverse.', ['@granularity' => $granularity, '@reverse' => $reverse ? 'reverse' : 'forward']));
         $view->destroy();
         unset($view);
       }
diff --git a/core/modules/views/tests/src/Kernel/Handler/SortRandomTest.php b/core/modules/views/tests/src/Kernel/Handler/SortRandomTest.php
index 97b2707336453672563bda445da67e803927ccdc..941ed8d9efa60133b37a43a78ecf2a405f77f609 100644
--- a/core/modules/views/tests/src/Kernel/Handler/SortRandomTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/SortRandomTest.php
@@ -19,7 +19,7 @@ class SortRandomTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Add more items to the test set, to make the order tests more robust.
@@ -34,13 +34,13 @@ class SortRandomTest extends ViewsKernelTestBase {
   protected function dataSet() {
     $data = parent::dataSet();
     for ($i = 0; $i < 55; $i++) {
-      $data[] = array(
+      $data[] = [
         'name' => 'name_' . $i,
         'age' => $i,
         'job' => 'job_' . $i,
         'created' => rand(0, time()),
         'status' => 1,
-      );
+      ];
     }
     return $data;
   }
@@ -53,13 +53,13 @@ protected function getBasicRandomView() {
     $view->setDisplay();
 
     // Add a random ordering.
-    $view->displayHandlers->get('default')->overrideOption('sorts', array(
-      'random' => array(
+    $view->displayHandlers->get('default')->overrideOption('sorts', [
+      'random' => [
         'id' => 'random',
         'field' => 'random',
         'table' => 'views',
-      ),
-    ));
+      ],
+    ]);
 
     return $view;
   }
@@ -76,28 +76,28 @@ public function testRandomOrdering() {
 
     // Verify the result.
     $this->assertEqual(count($this->dataSet()), count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultset($view, $this->dataSet(), array(
+    $this->assertIdenticalResultset($view, $this->dataSet(), [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
 
     // Execute a random view, we expect the result set to be different.
     $view_random = $this->getBasicRandomView();
     $this->executeView($view_random);
     $this->assertEqual(count($this->dataSet()), count($view_random->result), 'The number of returned rows match.');
-    $this->assertNotIdenticalResultset($view_random, $view->result, array(
+    $this->assertNotIdenticalResultset($view_random, $view->result, [
       'views_test_data_name' => 'views_test_data_name',
       'views_test_data_age' => 'views_test_data_name',
-    ));
+    ]);
 
     // Execute a second random view, we expect the result set to be different again.
     $view_random_2 = $this->getBasicRandomView();
     $this->executeView($view_random_2);
     $this->assertEqual(count($this->dataSet()), count($view_random_2->result), 'The number of returned rows match.');
-    $this->assertNotIdenticalResultset($view_random, $view->result, array(
+    $this->assertNotIdenticalResultset($view_random, $view->result, [
       'views_test_data_name' => 'views_test_data_name',
       'views_test_data_age' => 'views_test_data_name',
-    ));
+    ]);
   }
 
   /**
diff --git a/core/modules/views/tests/src/Kernel/Handler/SortTest.php b/core/modules/views/tests/src/Kernel/Handler/SortTest.php
index 38cbcd1a370393f6adcec31d436ea52d37cad5ec..91560495fb88a9d9ea38e045fc415520775f719d 100644
--- a/core/modules/views/tests/src/Kernel/Handler/SortTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/SortTest.php
@@ -17,7 +17,7 @@ class SortTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests numeric ordering of the result set.
@@ -27,49 +27,49 @@ public function testNumericOrdering() {
     $view->setDisplay();
 
     // Change the ordering
-    $view->displayHandlers->get('default')->overrideOption('sorts', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('sorts', [
+      'age' => [
         'order' => 'ASC',
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     // Execute the view.
     $this->executeView($view);
 
     // Verify the result.
     $this->assertEqual(count($this->dataSet()), count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultset($view, $this->orderResultSet($this->dataSet(), 'age'), array(
+    $this->assertIdenticalResultset($view, $this->orderResultSet($this->dataSet(), 'age'), [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
 
     $view->destroy();
     $view->setDisplay();
 
     // Reverse the ordering
-    $view->displayHandlers->get('default')->overrideOption('sorts', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('sorts', [
+      'age' => [
         'order' => 'DESC',
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     // Execute the view.
     $this->executeView($view);
 
     // Verify the result.
     $this->assertEqual(count($this->dataSet()), count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultset($view, $this->orderResultSet($this->dataSet(), 'age', TRUE), array(
+    $this->assertIdenticalResultset($view, $this->orderResultSet($this->dataSet(), 'age', TRUE), [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
   }
 
   /**
@@ -80,49 +80,49 @@ public function testStringOrdering() {
     $view->setDisplay();
 
     // Change the ordering
-    $view->displayHandlers->get('default')->overrideOption('sorts', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('sorts', [
+      'name' => [
         'order' => 'ASC',
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     // Execute the view.
     $this->executeView($view);
 
     // Verify the result.
     $this->assertEqual(count($this->dataSet()), count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultset($view, $this->orderResultSet($this->dataSet(), 'name'), array(
+    $this->assertIdenticalResultset($view, $this->orderResultSet($this->dataSet(), 'name'), [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
 
     $view->destroy();
     $view->setDisplay();
 
     // Reverse the ordering
-    $view->displayHandlers->get('default')->overrideOption('sorts', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('sorts', [
+      'name' => [
         'order' => 'DESC',
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'relationship' => 'none',
-      ),
-    ));
+      ],
+    ]);
 
     // Execute the view.
     $this->executeView($view);
 
     // Verify the result.
     $this->assertEqual(count($this->dataSet()), count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultset($view, $this->orderResultSet($this->dataSet(), 'name', TRUE), array(
+    $this->assertIdenticalResultset($view, $this->orderResultSet($this->dataSet(), 'name', TRUE), [
       'views_test_data_name' => 'name',
       'views_test_data_age' => 'age',
-    ));
+    ]);
   }
 
 }
diff --git a/core/modules/views/tests/src/Kernel/ModuleTest.php b/core/modules/views/tests/src/Kernel/ModuleTest.php
index 204433dc963cbcfd3ce403378c703677e4f1cd99..4ed5e0a969740304b0f4ab5b12576f4c7c4c9771 100644
--- a/core/modules/views/tests/src/Kernel/ModuleTest.php
+++ b/core/modules/views/tests/src/Kernel/ModuleTest.php
@@ -19,7 +19,7 @@ class ModuleTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view_status', 'test_view', 'test_argument');
+  public static $testViews = ['test_view_status', 'test_view', 'test_argument'];
 
   /**
    * Modules to enable.
@@ -43,27 +43,27 @@ class ModuleTest extends ViewsKernelTestBase {
    * @see views_get_handler()
    */
   public function testViewsGetHandler() {
-    $types = array('field', 'area', 'filter');
+    $types = ['field', 'area', 'filter'];
     foreach ($types as $type) {
-      $item = array(
+      $item = [
         'table' => $this->randomMachineName(),
         'field' => $this->randomMachineName(),
-      );
+      ];
       $handler = $this->container->get('plugin.manager.views.' . $type)->getHandler($item);
       $this->assertEqual('Drupal\views\Plugin\views\\' . $type . '\Broken', get_class($handler), new FormattableMarkup('Make sure that a broken handler of type: @type is created.', ['@type' => $type]));
     }
 
     $views_data = $this->viewsData();
-    $test_tables = array('views_test_data' => array('id', 'name'));
+    $test_tables = ['views_test_data' => ['id', 'name']];
     foreach ($test_tables as $table => $fields) {
       foreach ($fields as $field) {
         $data = $views_data[$table][$field];
-        $item = array(
+        $item = [
           'table' => $table,
           'field' => $field,
-        );
+        ];
         foreach ($data as $id => $field_data) {
-          if (!in_array($id, array('title', 'help'))) {
+          if (!in_array($id, ['title', 'help'])) {
             $handler = $this->container->get('plugin.manager.views.' . $id)->getHandler($item);
             $this->assertInstanceHandler($handler, $table, $field, $id);
           }
@@ -72,10 +72,10 @@ public function testViewsGetHandler() {
     }
 
     // Test the override handler feature.
-    $item = array(
+    $item = [
       'table' => 'views_test_data',
       'field' => 'job',
-    );
+    ];
     $handler = $this->container->get('plugin.manager.views.filter')->getHandler($item, 'standard');
     $this->assertTrue($handler instanceof Standard);
 
@@ -84,29 +84,29 @@ public function testViewsGetHandler() {
     return;
 
     // Test non-existent tables/fields.
-    set_error_handler(array($this, 'customErrorHandler'));
-    $item = array(
+    set_error_handler([$this, 'customErrorHandler']);
+    $item = [
       'table' => 'views_test_data',
       'field' => 'field_invalid',
-    );
+    ];
     $this->container->get('plugin.manager.views.field')->getHandler($item);
-    $this->assertTrue(strpos($this->lastErrorMessage, format_string("Missing handler: @table @field @type", array('@table' => 'views_test_data', '@field' => 'field_invalid', '@type' => 'field'))) !== FALSE, 'An invalid field name throws a debug message.');
+    $this->assertTrue(strpos($this->lastErrorMessage, format_string("Missing handler: @table @field @type", ['@table' => 'views_test_data', '@field' => 'field_invalid', '@type' => 'field'])) !== FALSE, 'An invalid field name throws a debug message.');
     unset($this->lastErrorMessage);
 
-    $item = array(
+    $item = [
       'table' => 'table_invalid',
       'field' => 'id',
-    );
+    ];
     $this->container->get('plugin.manager.views.filter')->getHandler($item);
-    $this->assertEqual(strpos($this->lastErrorMessage, format_string("Missing handler: @table @field @type", array('@table' => 'table_invalid', '@field' => 'id', '@type' => 'filter'))) !== FALSE, 'An invalid table name throws a debug message.');
+    $this->assertEqual(strpos($this->lastErrorMessage, format_string("Missing handler: @table @field @type", ['@table' => 'table_invalid', '@field' => 'id', '@type' => 'filter'])) !== FALSE, 'An invalid table name throws a debug message.');
     unset($this->lastErrorMessage);
 
-    $item = array(
+    $item = [
       'table' => 'table_invalid',
       'field' => 'id',
-    );
+    ];
     $this->container->get('plugin.manager.views.filter')->getHandler($item);
-    $this->assertEqual(strpos($this->lastErrorMessage, format_string("Missing handler: @table @field @type", array('@table' => 'table_invalid', '@field' => 'id', '@type' => 'filter'))) !== FALSE, 'An invalid table name throws a debug message.');
+    $this->assertEqual(strpos($this->lastErrorMessage, format_string("Missing handler: @table @field @type", ['@table' => 'table_invalid', '@field' => 'id', '@type' => 'filter'])) !== FALSE, 'An invalid table name throws a debug message.');
     unset($this->lastErrorMessage);
 
     restore_error_handler();
@@ -139,8 +139,8 @@ public function customErrorHandler($error_level, $message, $filename, $line, $co
    * Tests the load wrapper/helper functions.
    */
   public function testLoadFunctions() {
-    $this->enableModules(array('text', 'node'));
-    $this->installConfig(array('node'));
+    $this->enableModules(['text', 'node']);
+    $this->installConfig(['node']);
     $storage = $this->container->get('entity.manager')->getStorage('view');
 
     // Test views_view_is_enabled/disabled.
@@ -172,7 +172,7 @@ public function testLoadFunctions() {
     // Test Views::getViewsAsOptions().
     // Test the $views_only parameter.
     $this->assertIdentical(array_keys($all_views), array_keys(Views::getViewsAsOptions(TRUE)), 'Expected option keys for all views were returned.');
-    $expected_options = array();
+    $expected_options = [];
     foreach ($all_views as $id => $view) {
       $expected_options[$id] = $view->label();
     }
@@ -196,10 +196,10 @@ public function testLoadFunctions() {
     $this->assertFalse(array_key_exists('archive', Views::getViewsAsOptions(TRUE, 'all', $archive->getExecutable())), 'View excluded from options based on object');
 
     // Test the $opt_group parameter.
-    $expected_opt_groups = array();
+    $expected_opt_groups = [];
     foreach ($all_views as $view) {
       foreach ($view->get('display') as $display) {
-        $expected_opt_groups[$view->id()][$view->id() . ':' . $display['id']] = (string) t('@view : @display', array('@view' => $view->id(), '@display' => $display['id']));
+        $expected_opt_groups[$view->id()][$view->id() . ':' . $display['id']] = (string) t('@view : @display', ['@view' => $view->id(), '@display' => $display['id']]);
       }
     }
     $this->assertIdentical($expected_opt_groups, $this->castSafeStrings(Views::getViewsAsOptions(FALSE, 'all', NULL, TRUE)), 'Expected option array for an option group returned.');
@@ -229,7 +229,7 @@ public function testViewsFetchPluginNames() {
     // All style plugins should be returned, as we have not specified a type.
     $plugins = Views::fetchPluginNames('style');
     $definitions = $this->container->get('plugin.manager.views.style')->getDefinitions();
-    $expected = array();
+    $expected = [];
     foreach ($definitions as $id => $definition) {
       $expected[$id] = $definition['title'];
     }
@@ -239,11 +239,11 @@ public function testViewsFetchPluginNames() {
     // Test using the 'test' style plugin type only returns the test_style and
     // mapping_test plugins.
     $plugins = Views::fetchPluginNames('style', 'test');
-    $this->assertIdentical(array_keys($plugins), array('mapping_test', 'test_style', 'test_template_style'));
+    $this->assertIdentical(array_keys($plugins), ['mapping_test', 'test_style', 'test_template_style']);
 
     // Test a non existent style plugin type returns no plugins.
     $plugins = Views::fetchPluginNames('style', $this->randomString());
-    $this->assertIdentical($plugins, array());
+    $this->assertIdentical($plugins, []);
   }
 
   /**
@@ -252,11 +252,11 @@ public function testViewsFetchPluginNames() {
   public function testViewsPluginList() {
     $plugin_list = Views::pluginList();
     // Only plugins used by 'test_view' should be in the plugin list.
-    foreach (array('display:default', 'pager:none') as $key) {
+    foreach (['display:default', 'pager:none'] as $key) {
       list($plugin_type, $plugin_id) = explode(':', $key);
       $plugin_def = $this->container->get("plugin.manager.views.$plugin_type")->getDefinition($plugin_id);
 
-      $this->assertTrue(isset($plugin_list[$key]), SafeMarkup::format('The expected @key plugin list key was found.', array('@key' => $key)));
+      $this->assertTrue(isset($plugin_list[$key]), SafeMarkup::format('The expected @key plugin list key was found.', ['@key' => $key]));
       $plugin_details = $plugin_list[$key];
 
       $this->assertEqual($plugin_details['type'], $plugin_type, 'The expected plugin type was found.');
@@ -303,35 +303,35 @@ public function testViewsPreview() {
     $this->assertEqual(count($result['#view']->result), 5);
 
     $view = Views::getView('test_argument');
-    $result = $view->preview('default', array('0' => 1));
+    $result = $view->preview('default', ['0' => 1]);
     $this->assertEqual(count($result['#view']->result), 1);
 
     $view = Views::getView('test_argument');
-    $result = $view->preview('default', array('3' => 1));
+    $result = $view->preview('default', ['3' => 1]);
     $this->assertEqual(count($result['#view']->result), 1);
 
     $view = Views::getView('test_argument');
-    $result = $view->preview('default', array('0' => '1,2'));
+    $result = $view->preview('default', ['0' => '1,2']);
     $this->assertEqual(count($result['#view']->result), 2);
 
     $view = Views::getView('test_argument');
-    $result = $view->preview('default', array('3' => '1,2'));
+    $result = $view->preview('default', ['3' => '1,2']);
     $this->assertEqual(count($result['#view']->result), 2);
 
     $view = Views::getView('test_argument');
-    $result = $view->preview('default', array('0' => '1,2', '1' => 'John'));
+    $result = $view->preview('default', ['0' => '1,2', '1' => 'John']);
     $this->assertEqual(count($result['#view']->result), 1);
 
     $view = Views::getView('test_argument');
-    $result = $view->preview('default', array('3' => '1,2', '4' => 'John'));
+    $result = $view->preview('default', ['3' => '1,2', '4' => 'John']);
     $this->assertEqual(count($result['#view']->result), 1);
 
     $view = Views::getView('test_argument');
-    $result = $view->preview('default', array('0' => '1,2', '1' => 'John,George'));
+    $result = $view->preview('default', ['0' => '1,2', '1' => 'John,George']);
     $this->assertEqual(count($result['#view']->result), 2);
 
     $view = Views::getView('test_argument');
-    $result = $view->preview('default', array('3' => '1,2', '4' => 'John,George'));
+    $result = $view->preview('default', ['3' => '1,2', '4' => 'John,George']);
     $this->assertEqual(count($result['#view']->result), 2);
   }
 
@@ -345,12 +345,12 @@ public function testViewsPreview() {
    * @return array
    *   A formatted options array that matches the expected output.
    */
-  protected function formatViewOptions(array $views = array()) {
-    $expected_options = array();
+  protected function formatViewOptions(array $views = []) {
+    $expected_options = [];
     foreach ($views as $view) {
       foreach ($view->get('display') as $display) {
         $expected_options[$view->id() . ':' . $display['id']] = (string) t('View: @view - Display: @display',
-          array('@view' => $view->id(), '@display' => $display['id']));
+          ['@view' => $view->id(), '@display' => $display['id']]);
       }
     }
 
diff --git a/core/modules/views/tests/src/Kernel/Plugin/BlockDependenciesTest.php b/core/modules/views/tests/src/Kernel/Plugin/BlockDependenciesTest.php
index 6b5de6e6aec1925463edde6bc0b4664ff18ab19c..1a9f32eff7b2dd940949ad5a832496b669668be8 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/BlockDependenciesTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/BlockDependenciesTest.php
@@ -17,14 +17,14 @@ class BlockDependenciesTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_exposed_block');
+  public static $testViews = ['test_exposed_block'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('node', 'block', 'user', 'field');
+  public static $modules = ['node', 'block', 'user', 'field'];
 
   /**
    * Tests that exposed filter blocks have the correct dependencies.
@@ -34,11 +34,11 @@ class BlockDependenciesTest extends ViewsKernelTestBase {
   public function testExposedBlock() {
     $block = $this->createBlock('views_exposed_filter_block:test_exposed_block-page_1');
     $dependencies = $block->calculateDependencies()->getDependencies();
-    $expected = array(
-      'config' => array('views.view.test_exposed_block'),
-      'module' => array('views'),
-      'theme' => array('stark')
-    );
+    $expected = [
+      'config' => ['views.view.test_exposed_block'],
+      'module' => ['views'],
+      'theme' => ['stark']
+    ];
     $this->assertIdentical($expected, $dependencies);
   }
 
@@ -50,11 +50,11 @@ public function testExposedBlock() {
   public function testViewsBlock() {
     $block = $this->createBlock('views_block:content_recent-block_1');
     $dependencies = $block->calculateDependencies()->getDependencies();
-    $expected = array(
-      'config' => array('views.view.content_recent'),
-      'module' => array('views'),
-      'theme' => array('stark')
-    );
+    $expected = [
+      'config' => ['views.view.content_recent'],
+      'module' => ['views'],
+      'theme' => ['stark']
+    ];
     $this->assertIdentical($expected, $dependencies);
   }
 
@@ -82,18 +82,18 @@ public function testViewsBlock() {
    * @return \Drupal\block\Entity\Block
    *   The block entity.
    */
-  protected function createBlock($plugin_id, array $settings = array()) {
-    $settings += array(
+  protected function createBlock($plugin_id, array $settings = []) {
+    $settings += [
       'plugin' => $plugin_id,
       'region' => 'sidebar_first',
       'id' => strtolower($this->randomMachineName(8)),
       'theme' => $this->config('system.theme')->get('default'),
       'label' => $this->randomMachineName(8),
-      'visibility' => array(),
+      'visibility' => [],
       'weight' => 0,
-    );
+    ];
     $values = [];
-    foreach (array('region', 'id', 'theme', 'plugin', 'weight', 'visibility') as $key) {
+    foreach (['region', 'id', 'theme', 'plugin', 'weight', 'visibility'] as $key) {
       $values[$key] = $settings[$key];
       // Remove extra values that do not belong in the settings array.
       unset($settings[$key]);
diff --git a/core/modules/views/tests/src/Kernel/Plugin/CacheTest.php b/core/modules/views/tests/src/Kernel/Plugin/CacheTest.php
index e1328d767e08b8de5f92420836af91b488810ee0..01c6721726796fb4423c2577df07cbb9e7d43c14 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/CacheTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/CacheTest.php
@@ -21,14 +21,14 @@ class CacheTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'test_cache', 'test_groupwise_term_ui', 'test_display', 'test_filter');
+  public static $testViews = ['test_view', 'test_cache', 'test_groupwise_term_ui', 'test_display', 'test_filter'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('taxonomy', 'text', 'user', 'node');
+  public static $modules = ['taxonomy', 'text', 'user', 'node'];
 
   /**
    * {@inheritdoc}
@@ -70,13 +70,13 @@ protected function viewsData() {
   public function testTimeResultCaching() {
     $view = Views::getView('test_cache');
     $view->setDisplay();
-    $view->display_handler->overrideOption('cache', array(
+    $view->display_handler->overrideOption('cache', [
       'type' => 'time',
-      'options' => array(
+      'options' => [
         'results_lifespan' => '3600',
         'output_lifespan' => '3600',
-      )
-    ));
+      ]
+    ]);
 
     // Test the default (non-paged) display.
     $this->executeView($view);
@@ -84,11 +84,11 @@ public function testTimeResultCaching() {
     $this->assertEqual(5, count($view->result), 'The number of returned rows match.');
 
     // Add another man to the beatles.
-    $record = array(
+    $record = [
       'name' => 'Rod Davis',
       'age' => 29,
       'job' => 'Banjo',
-    );
+    ];
     db_insert('views_test_data')->fields($record)->execute();
 
     // The result should be the same as before, because of the caching. (Note
@@ -112,25 +112,25 @@ public function testTimeResultCachingWithFilter() {
 
     $view = Views::getView('test_filter');
     $view->initDisplay();
-    $view->display_handler->overrideOption('cache', array(
+    $view->display_handler->overrideOption('cache', [
       'type' => 'time',
-      'options' => array(
+      'options' => [
         'results_lifespan' => '3600',
         'output_lifespan' => '3600',
-      ),
-    ));
+      ],
+    ]);
 
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'test_filter' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'test_filter' => [
         'id' => 'test_filter',
         'table' => 'views_test_data',
         'field' => 'name',
         'operator' => '=',
         'value' => 'John',
         'group' => 0,
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
@@ -138,29 +138,29 @@ public function testTimeResultCachingWithFilter() {
     $cid1 = $view->display_handler->getPlugin('cache')->generateResultsKey();
 
     // Build the expected result.
-    $dataset = array(array('name' => 'John'));
+    $dataset = [['name' => 'John']];
 
     // Verify the result.
     $this->assertEqual(1, count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultSet($view, $dataset, array(
+    $this->assertIdenticalResultSet($view, $dataset, [
       'views_test_data_name' => 'name',
-    ));
+    ]);
 
     $view->destroy();
 
     $view->initDisplay();
 
     // Change the filtering.
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'test_filter' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'test_filter' => [
         'id' => 'test_filter',
         'table' => 'views_test_data',
         'field' => 'name',
         'operator' => '=',
         'value' => 'Ringo',
         'group' => 0,
-      ),
-    ));
+      ],
+    ]);
 
     $this->executeView($view);
 
@@ -169,13 +169,13 @@ public function testTimeResultCachingWithFilter() {
     $this->assertNotEqual($cid1, $cid2, "Results keys are different.");
 
     // Build the expected result.
-    $dataset = array(array('name' => 'Ringo'));
+    $dataset = [['name' => 'Ringo']];
 
     // Verify the result.
     $this->assertEqual(1, count($view->result), 'The number of returned rows match.');
-    $this->assertIdenticalResultSet($view, $dataset, array(
+    $this->assertIdenticalResultSet($view, $dataset, [
       'views_test_data_name' => 'name',
-    ));
+    ]);
   }
 
   /**
@@ -184,13 +184,13 @@ public function testTimeResultCachingWithFilter() {
   public function testTimeResultCachingWithPager() {
     $view = Views::getView('test_cache');
     $view->setDisplay();
-    $view->display_handler->overrideOption('cache', array(
+    $view->display_handler->overrideOption('cache', [
       'type' => 'time',
-      'options' => array(
+      'options' => [
         'results_lifespan' => '3600',
         'output_lifespan' => '3600',
-      )
-    ));
+      ]
+    ]);
 
     $mapping = ['views_test_data_name' => 'name'];
 
@@ -228,30 +228,30 @@ function testNoneResultCaching() {
     // Create a basic result which just 2 results.
     $view = Views::getView('test_cache');
     $view->setDisplay();
-    $view->display_handler->overrideOption('cache', array(
+    $view->display_handler->overrideOption('cache', [
       'type' => 'none',
-      'options' => array(),
-    ));
+      'options' => [],
+    ]);
 
     $this->executeView($view);
     // Verify the result.
     $this->assertEqual(5, count($view->result), 'The number of returned rows match.');
 
     // Add another man to the beatles.
-    $record = array(
+    $record = [
       'name' => 'Rod Davis',
       'age' => 29,
       'job' => 'Banjo',
-    );
+    ];
     db_insert('views_test_data')->fields($record)->execute();
 
     // The Result changes, because the view is not cached.
     $view = Views::getView('test_cache');
     $view->setDisplay();
-    $view->display_handler->overrideOption('cache', array(
+    $view->display_handler->overrideOption('cache', [
       'type' => 'none',
-      'options' => array(),
-    ));
+      'options' => [],
+    ]);
 
     $this->executeView($view);
     // Verify the result.
@@ -268,12 +268,12 @@ function testHeaderStorage() {
     $view = Views::getView('test_view');
     $view->setDisplay();
     $view->storage->set('id', 'test_cache_header_storage');
-    $view->display_handler->overrideOption('cache', array(
+    $view->display_handler->overrideOption('cache', [
       'type' => 'time',
-      'options' => array(
+      'options' => [
         'output_lifespan' => '3600',
-      )
-    ));
+      ]
+    ]);
 
     $output = $view->buildRenderable();
     /** @var \Drupal\Core\Render\RendererInterface $renderer */
@@ -326,13 +326,13 @@ public function testCacheData() {
 
     $view = Views::getView('test_display');
     $view->setDisplay();
-    $view->display_handler->overrideOption('cache', array(
+    $view->display_handler->overrideOption('cache', [
       'type' => 'time',
-      'options' => array(
+      'options' => [
         'results_lifespan' => '3600',
         'output_lifespan' => '3600',
-      )
-    ));
+      ]
+    ]);
     $this->executeView($view);
 
     // Get the cache item.
@@ -390,13 +390,13 @@ public function testArgumentDefaultCache() {
     $view = Views::getView('test_view');
 
     // Add a new argument and set the test plugin for the argument_default.
-    $options = array(
+    $options = [
       'default_argument_type' => 'argument_default_test',
-      'default_argument_options' => array(
+      'default_argument_options' => [
         'value' => 'John'
-      ),
+      ],
       'default_action' => 'default'
-    );
+    ];
     $view->addHandler('default', 'argument', 'views_test_data', 'name', $options);
     $view->initHandlers();
 
diff --git a/core/modules/views/tests/src/Kernel/Plugin/DisplayKernelTest.php b/core/modules/views/tests/src/Kernel/Plugin/DisplayKernelTest.php
index 156b06119ccf4ec917c98ae5d153fec532488318..69666cf342241de06a332c7645190e2b950a1ddb 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/DisplayKernelTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/DisplayKernelTest.php
@@ -24,14 +24,14 @@ class DisplayKernelTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'node', 'field', 'user');
+  public static $modules = ['block', 'node', 'field', 'user'];
 
   /**
    * Views plugin types to test.
    *
    * @var array
    */
-  protected $pluginTypes = array(
+  protected $pluginTypes = [
     'access',
     'cache',
     'query',
@@ -39,24 +39,24 @@ class DisplayKernelTest extends ViewsKernelTestBase {
     'pager',
     'style',
     'row',
-  );
+  ];
 
   /**
    * Views handler types to test.
    *
    * @var array
    */
-  protected $handlerTypes = array(
+  protected $handlerTypes = [
     'fields',
     'sorts',
-  );
+  ];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_display_defaults');
+  public static $testViews = ['test_display_defaults'];
 
   /**
    * Tests the default display options.
diff --git a/core/modules/views/tests/src/Kernel/Plugin/DisplayPageTest.php b/core/modules/views/tests/src/Kernel/Plugin/DisplayPageTest.php
index 5e4724a82b20580366dd244d49c8ed601903705f..8aaaa2dd5d764639b3caeedf33251268754ba0e2 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/DisplayPageTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/DisplayPageTest.php
@@ -22,14 +22,14 @@ class DisplayPageTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_page_display', 'test_page_display_route', 'test_page_display_menu');
+  public static $testViews = ['test_page_display', 'test_page_display_route', 'test_page_display_menu'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field');
+  public static $modules = ['system', 'user', 'field'];
 
   /**
    * The router dumper to get all routes.
diff --git a/core/modules/views/tests/src/Kernel/Plugin/JoinTest.php b/core/modules/views/tests/src/Kernel/Plugin/JoinTest.php
index db0262a1dbbc62b6d7e2fe2f06933baeecf89ea4..0839fcb2c86488313cbf65ebf68ea048c45f9f88 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/JoinTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/JoinTest.php
@@ -21,7 +21,7 @@ class JoinTest extends RelationshipJoinTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * A plugin manager which handlers the instances of joins.
@@ -47,12 +47,12 @@ public function testExamplePlugin() {
     $view->initDisplay();
     $view->initQuery();
 
-    $configuration = array(
+    $configuration = [
       'left_table' => 'views_test_data',
       'left_field' => 'uid',
       'table' => 'users_field_data',
       'field' => 'uid',
-    );
+    ];
     $join = $this->manager->createInstance('join_test', $configuration);
     $this->assertTrue($join instanceof JoinTestPlugin, 'The correct join class got loaded.');
 
@@ -60,7 +60,7 @@ public function testExamplePlugin() {
     $join->setJoinValue($rand_int);
 
     $query = db_select('views_test_data');
-    $table = array('alias' => 'users_field_data');
+    $table = ['alias' => 'users_field_data'];
     $join->buildJoin($query, $table, $view->query);
 
     $tables = $query->getTables();
@@ -80,13 +80,13 @@ public function testBasePlugin() {
 
     // First define a simple join without an extra condition.
     // Set the various options on the join object.
-    $configuration = array(
+    $configuration = [
       'left_table' => 'views_test_data',
       'left_field' => 'uid',
       'table' => 'users_field_data',
       'field' => 'uid',
       'adjusted' => TRUE,
-    );
+    ];
     $join = $this->manager->createInstance('standard', $configuration);
     $this->assertTrue($join instanceof JoinPluginBase, 'The correct join class got loaded.');
     $this->assertNull($join->extra, 'The field extra was not overridden.');
@@ -95,7 +95,7 @@ public function testBasePlugin() {
     // Build the actual join values and read them back from the dbtng query
     // object.
     $query = db_select('views_test_data');
-    $table = array('alias' => 'users_field_data');
+    $table = ['alias' => 'users_field_data'];
     $join->buildJoin($query, $table, $view->query);
 
     $tables = $query->getTables();
@@ -107,7 +107,7 @@ public function testBasePlugin() {
 
     // Set a different alias and make sure table info is as expected.
     $join = $this->manager->createInstance('standard', $configuration);
-    $table = array('alias' => 'users1');
+    $table = ['alias' => 'users1'];
     $join->buildJoin($query, $table, $view->query);
 
     $tables = $query->getTables();
@@ -117,7 +117,7 @@ public function testBasePlugin() {
     // Set a different join type (INNER) and make sure it is used.
     $configuration['type'] = 'INNER';
     $join = $this->manager->createInstance('standard', $configuration);
-    $table = array('alias' => 'users2');
+    $table = ['alias' => 'users2'];
     $join->buildJoin($query, $table, $view->query);
 
     $tables = $query->getTables();
@@ -127,19 +127,19 @@ public function testBasePlugin() {
     // Setup addition conditions and make sure it is used.
     $random_name_1 = $this->randomMachineName();
     $random_name_2 = $this->randomMachineName();
-    $configuration['extra'] = array(
-      array(
+    $configuration['extra'] = [
+      [
         'field' => 'name',
         'value' => $random_name_1
-      ),
-      array(
+      ],
+      [
         'field' => 'name',
         'value' => $random_name_2,
         'operator' => '<>'
-      ),
-    );
+      ],
+    ];
     $join = $this->manager->createInstance('standard', $configuration);
-    $table = array('alias' => 'users3');
+    $table = ['alias' => 'users3'];
     $join->buildJoin($query, $table, $view->query);
 
     $tables = $query->getTables();
@@ -147,25 +147,25 @@ public function testBasePlugin() {
     $this->assertTrue(strpos($join_info['condition'], "views_test_data.uid = users3.uid") !== FALSE, 'Make sure the join condition appears in the query.');
     $this->assertTrue(strpos($join_info['condition'], "users3.name = :views_join_condition_0") !== FALSE, 'Make sure the first extra join condition appears in the query and uses the first placeholder.');
     $this->assertTrue(strpos($join_info['condition'], "users3.name <> :views_join_condition_1") !== FALSE, 'Make sure the second extra join condition appears in the query and uses the second placeholder.');
-    $this->assertEqual(array_values($join_info['arguments']), array($random_name_1, $random_name_2), 'Make sure the arguments are in the right order');
+    $this->assertEqual(array_values($join_info['arguments']), [$random_name_1, $random_name_2], 'Make sure the arguments are in the right order');
 
     // Test that 'IN' conditions are properly built.
     $random_name_1 = $this->randomMachineName();
     $random_name_2 = $this->randomMachineName();
     $random_name_3 = $this->randomMachineName();
     $random_name_4 = $this->randomMachineName();
-    $configuration['extra'] = array(
-      array(
+    $configuration['extra'] = [
+      [
         'field' => 'name',
         'value' => $random_name_1
-      ),
-      array(
+      ],
+      [
         'field' => 'name',
-        'value' => array($random_name_2, $random_name_3, $random_name_4),
-      ),
-    );
+        'value' => [$random_name_2, $random_name_3, $random_name_4],
+      ],
+    ];
     $join = $this->manager->createInstance('standard', $configuration);
-    $table = array('alias' => 'users4');
+    $table = ['alias' => 'users4'];
     $join->buildJoin($query, $table, $view->query);
 
     $tables = $query->getTables();
@@ -173,26 +173,26 @@ public function testBasePlugin() {
     $this->assertTrue(strpos($join_info['condition'], "views_test_data.uid = users4.uid") !== FALSE, 'Make sure the join condition appears in the query.');
     $this->assertTrue(strpos($join_info['condition'], "users4.name = :views_join_condition_2") !== FALSE, 'Make sure the first extra join condition appears in the query.');
     $this->assertTrue(strpos($join_info['condition'], "users4.name IN ( :views_join_condition_3[] )") !== FALSE, 'The IN condition for the join is properly formed.');
-    $this->assertEqual($join_info['arguments'][':views_join_condition_3[]'], array($random_name_2, $random_name_3, $random_name_4), 'Make sure the IN arguments are still part of an array.');
+    $this->assertEqual($join_info['arguments'][':views_join_condition_3[]'], [$random_name_2, $random_name_3, $random_name_4], 'Make sure the IN arguments are still part of an array.');
 
     // Test that all the conditions are properly built.
-    $configuration['extra'] = array(
-      array(
+    $configuration['extra'] = [
+      [
         'field' => 'langcode',
         'value' => 'en'
-      ),
-      array(
+      ],
+      [
         'left_field' => 'status',
         'value' => 0,
         'numeric' => TRUE,
-      ),
-      array(
+      ],
+      [
         'field' => 'name',
         'left_field' => 'name'
-      ),
-    );
+      ],
+    ];
     $join = $this->manager->createInstance('standard', $configuration);
-    $table = array('alias' => 'users5');
+    $table = ['alias' => 'users5'];
     $join->buildJoin($query, $table, $view->query);
 
     $tables = $query->getTables();
@@ -201,7 +201,7 @@ public function testBasePlugin() {
     $this->assertTrue(strpos($join_info['condition'], "users5.langcode = :views_join_condition_4") !== FALSE, 'Make sure the first extra join condition appears in the query.');
     $this->assertTrue(strpos($join_info['condition'], "views_test_data.status = :views_join_condition_5") !== FALSE, 'Make sure the second extra join condition appears in the query.');
     $this->assertTrue(strpos($join_info['condition'], "users5.name = views_test_data.name") !== FALSE, 'Make sure the third extra join condition appears in the query.');
-    $this->assertEqual(array_values($join_info['arguments']), array('en', 0), 'Make sure the arguments are in the right order');
+    $this->assertEqual(array_values($join_info['arguments']), ['en', 0], 'Make sure the arguments are in the right order');
   }
 
 }
diff --git a/core/modules/views/tests/src/Kernel/Plugin/QueryTest.php b/core/modules/views/tests/src/Kernel/Plugin/QueryTest.php
index 2422deda3e83c532932a465dc99f7e7187a43336..02548b25c907f4356926e512106d89e7f50651f3 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/QueryTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/QueryTest.php
@@ -18,7 +18,7 @@ class QueryTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   protected function viewsData() {
     $data = parent::viewsData();
diff --git a/core/modules/views/tests/src/Kernel/Plugin/RelationshipJoinTestBase.php b/core/modules/views/tests/src/Kernel/Plugin/RelationshipJoinTestBase.php
index cf604f93596f573c10d9e5678c071469e2e8f22f..1163297b1bd96e5479223c46aee15640bc2dae41 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/RelationshipJoinTestBase.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/RelationshipJoinTestBase.php
@@ -18,7 +18,7 @@ abstract class RelationshipJoinTestBase extends PluginKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field');
+  public static $modules = ['system', 'user', 'field'];
 
   /**
    * @var \Drupal\user\Entity\User
@@ -30,7 +30,7 @@ abstract class RelationshipJoinTestBase extends PluginKernelTestBase {
    */
   protected function setUpFixtures() {
     $this->installEntitySchema('user');
-    $this->installConfig(array('user'));
+    $this->installConfig(['user']);
     parent::setUpFixtures();
 
     // Create a record for uid 1.
@@ -48,13 +48,13 @@ protected function setUpFixtures() {
   protected function schemaDefinition() {
     $schema = parent::schemaDefinition();
 
-    $schema['views_test_data']['fields']['uid'] = array(
+    $schema['views_test_data']['fields']['uid'] = [
       'description' => "The {users_field_data}.uid of the author of the beatle entry.",
       'type' => 'int',
       'unsigned' => TRUE,
       'not null' => TRUE,
       'default' => 0
-    );
+    ];
 
     return $schema;
   }
@@ -66,15 +66,15 @@ protected function schemaDefinition() {
    */
   protected function viewsData() {
     $data = parent::viewsData();
-    $data['views_test_data']['uid'] = array(
+    $data['views_test_data']['uid'] = [
       'title' => t('UID'),
       'help' => t('The test data UID'),
-      'relationship' => array(
+      'relationship' => [
         'id' => 'standard',
         'base' => 'users_field_data',
         'base field' => 'uid'
-      )
-    );
+      ]
+    ];
 
     return $data;
   }
diff --git a/core/modules/views/tests/src/Kernel/Plugin/RelationshipTest.php b/core/modules/views/tests/src/Kernel/Plugin/RelationshipTest.php
index 846da660d1cd2c467720b408078b86ccc9707fb9..802befe1ca76d19ad60d9db5f923948c4b91a722 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/RelationshipTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/RelationshipTest.php
@@ -19,17 +19,17 @@ class RelationshipTest extends RelationshipJoinTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Maps between the key in the expected result and the query result.
    *
    * @var array
    */
-  protected $columnMap = array(
+  protected $columnMap = [
     'views_test_data_name' => 'name',
     'users_field_data_views_test_data_uid' => 'uid',
-  );
+  ];
 
   /**
    * Tests the query result of a view with a relationship.
@@ -42,53 +42,53 @@ public function testRelationshipQuery() {
     $view = Views::getView('test_view');
     $view->setDisplay();
 
-    $view->displayHandlers->get('default')->overrideOption('relationships', array(
-      'uid' => array(
+    $view->displayHandlers->get('default')->overrideOption('relationships', [
+      'uid' => [
         'id' => 'uid',
         'table' => 'views_test_data',
         'field' => 'uid',
-      ),
-    ));
+      ],
+    ]);
 
-    $view->displayHandlers->get('default')->overrideOption('filters', array(
-      'uid' => array(
+    $view->displayHandlers->get('default')->overrideOption('filters', [
+      'uid' => [
         'id' => 'uid',
         'table' => 'users_field_data',
         'field' => 'uid',
         'relationship' => 'uid',
-      ),
-    ));
+      ],
+    ]);
 
     $fields = $view->displayHandlers->get('default')->getOption('fields');
-    $view->displayHandlers->get('default')->overrideOption('fields', $fields + array(
-      'uid' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', $fields + [
+      'uid' => [
         'id' => 'uid',
         'table' => 'users_field_data',
         'field' => 'uid',
         'relationship' => 'uid',
-      ),
-    ));
+      ],
+    ]);
 
     $view->initHandlers();
 
     // Check for all beatles created by admin.
-    $view->filter['uid']->value = array(1);
+    $view->filter['uid']->value = [1];
     $this->executeView($view);
 
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'name' => 'John',
         'uid' => 1
-      )
-    );
+      ]
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
     $view->destroy();
 
     // Check for all beatles created by another user, which so doesn't exist.
     $view->initHandlers();
-    $view->filter['uid']->value = array(3);
+    $view->filter['uid']->value = [3];
     $this->executeView($view);
-    $expected_result = array();
+    $expected_result = [];
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
     $view->destroy();
 
@@ -98,12 +98,12 @@ public function testRelationshipQuery() {
     $view->relationship['uid']->options['required'] = TRUE;
     $this->executeView($view);
 
-    $expected_result = array(
-      array(
+    $expected_result = [
+      [
         'name' => 'John',
         'uid' => 1
-      )
-    );
+      ]
+    ];
     $this->assertIdenticalResultset($view, $expected_result, $this->columnMap);
     $view->destroy();
 
diff --git a/core/modules/views/tests/src/Kernel/Plugin/RowEntityTest.php b/core/modules/views/tests/src/Kernel/Plugin/RowEntityTest.php
index 8d2d86632a6614accf4fbb6eba1259d8f5905796..b4ac0be838a5fae9972d926c70f801f42100193d 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/RowEntityTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/RowEntityTest.php
@@ -28,7 +28,7 @@ class RowEntityTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_entity_row');
+  public static $testViews = ['test_entity_row'];
 
   /**
    * {@inheritdoc}
@@ -37,7 +37,7 @@ protected function setUp($import_test_views = TRUE) {
     parent::setUp();
 
     $this->installEntitySchema('taxonomy_term');
-    $this->installConfig(array('taxonomy'));
+    $this->installConfig(['taxonomy']);
     \Drupal::service('router.builder')->rebuild();
   }
 
@@ -57,7 +57,7 @@ public function testEntityRow() {
     $this->assertText($term->getName(), 'The rendered entity appears as row in the view.');
 
     // Tests the available view mode options.
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $form_state->set('view', $view->storage);
     $view->rowPlugin->buildOptionsForm($form, $form_state);
diff --git a/core/modules/views/tests/src/Kernel/Plugin/RowRenderCacheTest.php b/core/modules/views/tests/src/Kernel/Plugin/RowRenderCacheTest.php
index ac85c77a969cd0164aa9e54927f640bb04ee5d90..223963e2d054c84bc38c36e1859cbeb3510f9645 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/RowRenderCacheTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/RowRenderCacheTest.php
@@ -24,14 +24,14 @@ class RowRenderCacheTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'node');
+  public static $modules = ['user', 'node'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_row_render_cache', 'test_row_render_cache_none');
+  public static $testViews = ['test_row_render_cache', 'test_row_render_cache_none'];
 
   /**
    * An editor user account.
diff --git a/core/modules/views/tests/src/Kernel/Plugin/SqlQueryTest.php b/core/modules/views/tests/src/Kernel/Plugin/SqlQueryTest.php
index ca7ba5bc7cb1c8c9af04c3f21ef5cc4955cac390..6846f77630462c4032c9424600f37dfec2320df1 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/SqlQueryTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/SqlQueryTest.php
@@ -18,7 +18,7 @@ class SqlQueryTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * {@inheritdoc}
@@ -26,7 +26,7 @@ class SqlQueryTest extends ViewsKernelTestBase {
   protected function viewsData() {
     $data = parent::viewsData();
     $data['views_test_data']['table']['base']['access query tag'] = 'test_tag';
-    $data['views_test_data']['table']['base']['query metadata'] = array('key1' => 'test_metadata', 'key2' => 'test_metadata2');
+    $data['views_test_data']['table']['base']['query metadata'] = ['key1' => 'test_metadata', 'key2' => 'test_metadata2'];
 
     return $data;
   }
@@ -45,7 +45,7 @@ public function testExecuteMetadata() {
     /** @var \Drupal\Core\Database\Query\Select $count_query */
     $count_query = $view->build_info['count_query'];
 
-    foreach (array($main_query, $count_query) as $query) {
+    foreach ([$main_query, $count_query] as $query) {
       // Check query access tags.
       $this->assertTrue($query->hasTag('test_tag'));
 
@@ -69,7 +69,7 @@ public function testExecuteMetadata() {
     /** @var \Drupal\Core\Database\Query\Select $count_query */
     $count_query = $view->build_info['count_query'];
 
-    foreach (array($main_query, $count_query) as $query) {
+    foreach ([$main_query, $count_query] as $query) {
       // Check query access tags.
       $this->assertFalse($query->hasTag('test_tag'));
 
diff --git a/core/modules/views/tests/src/Kernel/Plugin/StyleHtmlListTest.php b/core/modules/views/tests/src/Kernel/Plugin/StyleHtmlListTest.php
index f1f1fb1a62cdc129e61781dff5b9e09fa983b71c..717403dacc65d5dbc25a4ac987d09e56b9ee5862 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/StyleHtmlListTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/StyleHtmlListTest.php
@@ -18,7 +18,7 @@ class StyleHtmlListTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_style_html_list');
+  public static $testViews = ['test_style_html_list'];
 
   /**
    * Make sure that the HTML list style markup is correct.
diff --git a/core/modules/views/tests/src/Kernel/Plugin/StyleMappingTest.php b/core/modules/views/tests/src/Kernel/Plugin/StyleMappingTest.php
index 1cb44000ff2d825076d7bd9d70e54a24aced6ee5..d0683deb47aaa338556351751a1cae7922aec111 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/StyleMappingTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/StyleMappingTest.php
@@ -11,14 +11,14 @@
  */
 class StyleMappingTest extends StyleTestBase {
 
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_style_mapping');
+  public static $testViews = ['test_style_mapping'];
 
   /**
    * Verifies that the fields were mapped correctly.
@@ -68,7 +68,7 @@ protected function mappedOutputHelper($view) {
         // separated by ':'.
         $expected_result = $name . ':' . $data_set[$count][$field_id];
         $actual_result = (string) $field;
-        $this->assertIdentical($expected_result, $actual_result, format_string('The fields were mapped successfully: %name => %field_id', array('%name' => $name, '%field_id' => $field_id)));
+        $this->assertIdentical($expected_result, $actual_result, format_string('The fields were mapped successfully: %name => %field_id', ['%name' => $name, '%field_id' => $field_id]));
       }
 
       $count++;
diff --git a/core/modules/views/tests/src/Kernel/Plugin/StyleTableUnitTest.php b/core/modules/views/tests/src/Kernel/Plugin/StyleTableUnitTest.php
index f7ede520d6ad260119a5be7826c5fb91e9386b28..365b0c78e8ba1b53ce420c4d11665d0b2adde5b5 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/StyleTableUnitTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/StyleTableUnitTest.php
@@ -19,7 +19,7 @@ class StyleTableUnitTest extends PluginKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_table');
+  public static $testViews = ['test_table'];
 
   /**
    * Tests the table style.
@@ -101,7 +101,7 @@ public function testTable() {
     $view->destroy();
 
     // Use a existing field, and sort both ascending and descending.
-    foreach (array('asc', 'desc') as $order) {
+    foreach (['asc', 'desc'] as $order) {
       $this->prepareView($view);
       $style_plugin = $view->style_plugin;
       $request->query->set('sort', $order);
@@ -133,7 +133,7 @@ public function testTable() {
     // Render an empty result, and ensure that the area handler is rendered.
     $view->setDisplay('default');
     $view->executed = TRUE;
-    $view->result = array();
+    $view->result = [];
     $output = $view->preview();
     $output = \Drupal::service('renderer')->renderRoot($output);
 
diff --git a/core/modules/views/tests/src/Kernel/Plugin/StyleUnformattedTest.php b/core/modules/views/tests/src/Kernel/Plugin/StyleUnformattedTest.php
index 14e5895514ec63ae84bb0cc93c5188d0959b145d..f1b254cf7e6d5d903751578b7baf162dea8db020 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/StyleUnformattedTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/StyleUnformattedTest.php
@@ -16,7 +16,7 @@ class StyleUnformattedTest extends StyleTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Make sure that the default css classes works as expected.
diff --git a/core/modules/views/tests/src/Kernel/Plugin/ViewsBlockTest.php b/core/modules/views/tests/src/Kernel/Plugin/ViewsBlockTest.php
index d06ae66ba2a186dab68d3a084d2b4f2e54bb36ed..879f6d44d540bea72a4f155837167174a491709f 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/ViewsBlockTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/ViewsBlockTest.php
@@ -19,14 +19,14 @@ class ViewsBlockTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test_views');
+  public static $modules = ['block', 'block_test_views'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view_block');
+  public static $testViews = ['test_view_block'];
 
   /**
    * {@inheritdoc}
@@ -34,7 +34,7 @@ class ViewsBlockTest extends ViewsKernelTestBase {
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
 
-    ViewTestData::createTestViews(get_class($this), array('block_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['block_test_views']);
   }
 
   /**
@@ -43,11 +43,11 @@ protected function setUp($import_test_views = TRUE) {
    * @see \Drupal\views\Plugin\Block::getmachineNameSuggestion()
    */
   public function testMachineNameSuggestion() {
-    $plugin_definition = array(
+    $plugin_definition = [
       'provider' => 'views',
-    );
+    ];
     $plugin_id = 'views_block:test_view_block-block_1';
-    $views_block = ViewsBlock::create($this->container, array(), $plugin_id, $plugin_definition);
+    $views_block = ViewsBlock::create($this->container, [], $plugin_id, $plugin_definition);
 
     $this->assertEqual($views_block->getMachineNameSuggestion(), 'views_block__test_view_block_block_1');
   }
@@ -96,8 +96,8 @@ public function testBuildWithTitleOverride() {
     $view->setDisplay();
 
     // Add a fixed argument that sets a title and save the view.
-    $view->displayHandlers->get('default')->overrideOption('arguments', array(
-      'name' => array(
+    $view->displayHandlers->get('default')->overrideOption('arguments', [
+      'name' => [
         'default_action' => 'default',
         'title_enable' => TRUE,
         'title' => 'Overridden title',
@@ -105,16 +105,16 @@ public function testBuildWithTitleOverride() {
         'default_argument_options' => [
           'argument' => 'fixed'
         ],
-        'validate' => array(
+        'validate' => [
           'type' => 'none',
           'fail' => 'not found',
-        ),
+        ],
         'id' => 'name',
         'table' => 'views_test_data',
         'field' => 'name',
         'plugin_id' => 'string',
-      )
-    ));
+      ]
+    ]);
     $view->save();
 
     $plugin_definition = [
diff --git a/core/modules/views/tests/src/Kernel/PluginInstanceTest.php b/core/modules/views/tests/src/Kernel/PluginInstanceTest.php
index f5c61ee3e841cfbda6a2bbaac827b37ed55fcb9f..b120400604f73a1325052e03057f73e4b20676d9 100644
--- a/core/modules/views/tests/src/Kernel/PluginInstanceTest.php
+++ b/core/modules/views/tests/src/Kernel/PluginInstanceTest.php
@@ -16,7 +16,7 @@ class PluginInstanceTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  protected $pluginTypes = array(
+  protected $pluginTypes = [
     'access',
     'area',
     'argument',
@@ -36,7 +36,7 @@ class PluginInstanceTest extends ViewsKernelTestBase {
     'sort',
     'style',
     'wizard',
-  );
+  ];
 
   /**
    * An array of plugin definitions, keyed by plugin type.
@@ -60,8 +60,8 @@ public function testPluginData() {
 
     // Check all plugin types.
     foreach ($this->pluginTypes as $type) {
-      $this->assertTrue(array_key_exists($type, $this->definitions), format_string('Key for plugin type @type found.', array('@type' => $type)));
-      $this->assertTrue(is_array($this->definitions[$type]) && !empty($this->definitions[$type]), format_string('Plugin type @type has an array of plugins.', array('@type' => $type)));
+      $this->assertTrue(array_key_exists($type, $this->definitions), format_string('Key for plugin type @type found.', ['@type' => $type]));
+      $this->assertTrue(is_array($this->definitions[$type]) && !empty($this->definitions[$type]), format_string('Plugin type @type has an array of plugins.', ['@type' => $type]));
     }
 
     // Tests that the plugin list has not missed any types.
@@ -87,7 +87,7 @@ public function testPluginInstances() {
           // good to check they can be created but for throwing any notices for
           // method signatures etc. too.
           $instance = $manager->createInstance($id);
-          $this->assertTrue($instance instanceof $definition['class'], format_string('Instance of @type:@id created', array('@type' => $type, '@id' => $id)));
+          $this->assertTrue($instance instanceof $definition['class'], format_string('Instance of @type:@id created', ['@type' => $type, '@id' => $id]));
         }
       }
     }
diff --git a/core/modules/views/tests/src/Kernel/QueryGroupByTest.php b/core/modules/views/tests/src/Kernel/QueryGroupByTest.php
index 594bd6251b63156ce200b123687c2180c8fb9aa4..e4a088459fed4e7be2498867504d7214affb0dc6 100644
--- a/core/modules/views/tests/src/Kernel/QueryGroupByTest.php
+++ b/core/modules/views/tests/src/Kernel/QueryGroupByTest.php
@@ -20,14 +20,14 @@ class QueryGroupByTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_group_by_in_filters', 'test_aggregate_count', 'test_group_by_count', 'test_group_by_count_multicardinality', 'test_group_by_field_not_within_bundle');
+  public static $testViews = ['test_group_by_in_filters', 'test_aggregate_count', 'test_group_by_count', 'test_group_by_count_multicardinality', 'test_group_by_field_not_within_bundle'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'system', 'field', 'user', 'language');
+  public static $modules = ['entity_test', 'system', 'field', 'user', 'language'];
 
   /**
    * The storage for the test entity type.
@@ -63,7 +63,7 @@ public function testAggregateCount() {
 
     $this->assertEqual(count($view->result), 2, 'Make sure the count of items is right.');
 
-    $types = array();
+    $types = [];
     foreach ($view->result as $item) {
       // num_records is a alias for id.
       $types[$item->entity_test_name] = $item->num_records;
@@ -101,12 +101,12 @@ public function groupByTestHelper($aggregation_function, $values) {
 
     $this->assertEqual(count($view->result), 2, 'Make sure the count of items is right.');
     // Group by name to identify the right count.
-    $results = array();
+    $results = [];
     foreach ($view->result as $item) {
       $results[$item->entity_test_name] = $item->id;
     }
-    $this->assertEqual($results['name1'], $values[0], format_string('Aggregation with @aggregation_function and groupby name: name1 returned the expected amount of results', array('@aggregation_function' => $aggregation_function)));
-    $this->assertEqual($results['name2'], $values[1], format_string('Aggregation with @aggregation_function and groupby name: name2 returned the expected amount of results', array('@aggregation_function' => $aggregation_function)));
+    $this->assertEqual($results['name1'], $values[0], format_string('Aggregation with @aggregation_function and groupby name: name1 returned the expected amount of results', ['@aggregation_function' => $aggregation_function]));
+    $this->assertEqual($results['name2'], $values[1], format_string('Aggregation with @aggregation_function and groupby name: name2 returned the expected amount of results', ['@aggregation_function' => $aggregation_function]));
   }
 
   /**
@@ -114,18 +114,18 @@ public function groupByTestHelper($aggregation_function, $values) {
    */
   protected function setupTestEntities() {
     // Create 4 entities with name1 and 3 entities with name2.
-    $entity_1 = array(
+    $entity_1 = [
       'name' => 'name1',
-    );
+    ];
 
     $this->storage->create($entity_1)->save();
     $this->storage->create($entity_1)->save();
     $this->storage->create($entity_1)->save();
     $this->storage->create($entity_1)->save();
 
-    $entity_2 = array(
+    $entity_2 = [
       'name' => 'name2',
-    );
+    ];
     $this->storage->create($entity_2)->save();
     $this->storage->create($entity_2)->save();
     $this->storage->create($entity_2)->save();
@@ -135,42 +135,42 @@ protected function setupTestEntities() {
    * Tests the count aggregation function.
    */
   public function testGroupByCount() {
-    $this->groupByTestHelper('count', array(4, 3));
+    $this->groupByTestHelper('count', [4, 3]);
   }
 
   /**
    * Tests the sum aggregation function.
    */
   public function testGroupBySum() {
-    $this->groupByTestHelper('sum', array(10, 18));
+    $this->groupByTestHelper('sum', [10, 18]);
   }
 
   /**
    * Tests the average aggregation function.
    */
   public function testGroupByAverage() {
-    $this->groupByTestHelper('avg', array(2.5, 6));
+    $this->groupByTestHelper('avg', [2.5, 6]);
   }
 
   /**
    * Tests the min aggregation function.
    */
   public function testGroupByMin() {
-    $this->groupByTestHelper('min', array(1, 5));
+    $this->groupByTestHelper('min', [1, 5]);
   }
 
   /**
    * Tests the max aggregation function.
    */
   public function testGroupByMax() {
-    $this->groupByTestHelper('max', array(4, 7));
+    $this->groupByTestHelper('max', [4, 7]);
   }
 
   /**
    * Tests aggregation with no specific function.
    */
   public function testGroupByNone() {
-    $this->groupByTestHelper(NULL, array(1, 5));
+    $this->groupByTestHelper(NULL, [1, 5]);
   }
 
   /**
@@ -181,7 +181,7 @@ public function testGroupByCountOnlyFilters() {
     // doesn't display SUM, COUNT, MAX, etc. functions in SELECT statement.
 
     for ($x = 0; $x < 10; $x++) {
-      $this->storage->create(array('name' => 'name1'))->save();
+      $this->storage->create(['name' => 'name1'])->save();
     }
 
     $view = Views::getView('test_group_by_in_filters');
diff --git a/core/modules/views/tests/src/Kernel/TestViewsTest.php b/core/modules/views/tests/src/Kernel/TestViewsTest.php
index 79d88190965dd7f3210472b2a6ef9491121275b4..f9aa67342104c28522011d0ba6e9948d51000713 100644
--- a/core/modules/views/tests/src/Kernel/TestViewsTest.php
+++ b/core/modules/views/tests/src/Kernel/TestViewsTest.php
@@ -22,7 +22,7 @@ class TestViewsTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_test_data');
+  public static $modules = ['views_test_data'];
 
   /**
    * Tests default configuration data type.
diff --git a/core/modules/views/tests/src/Kernel/TokenReplaceTest.php b/core/modules/views/tests/src/Kernel/TokenReplaceTest.php
index 160f4e25e2bf34cf06b6232f128286f3fb7e2197..41f2cf07afda39e02c87fd224f52e4d5f55a66f4 100644
--- a/core/modules/views/tests/src/Kernel/TokenReplaceTest.php
+++ b/core/modules/views/tests/src/Kernel/TokenReplaceTest.php
@@ -12,14 +12,14 @@
  */
 class TokenReplaceTest extends ViewsKernelTestBase {
 
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_tokens', 'test_invalid_tokens');
+  public static $testViews = ['test_tokens', 'test_invalid_tokens'];
 
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
@@ -37,7 +37,7 @@ function testTokenReplacement() {
     $view->display_handler->getPlugin('pager')->setItemsPerPage(4);
     $this->executeView($view);
 
-    $expected = array(
+    $expected = [
       '[view:label]' => 'Test tokens',
       '[view:description]' => 'Test view to token replacement tests.',
       '[view:id]' => 'test_tokens',
@@ -49,7 +49,7 @@ function testTokenReplacement() {
       '[view:items-per-page]' => '4',
       '[view:current-page]' => '1',
       '[view:page-count]' => '2',
-    );
+    ];
 
     $base_bubbleable_metadata = BubbleableMetadata::createFromObject($view->storage);
     $metadata_tests = [];
@@ -67,8 +67,8 @@ function testTokenReplacement() {
 
     foreach ($expected as $token => $expected_output) {
       $bubbleable_metadata = new BubbleableMetadata();
-      $output = $token_handler->replace($token, array('view' => $view), [], $bubbleable_metadata);
-      $this->assertIdentical($output, $expected_output, format_string('Token %token replaced correctly.', array('%token' => $token)));
+      $output = $token_handler->replace($token, ['view' => $view], [], $bubbleable_metadata);
+      $this->assertIdentical($output, $expected_output, format_string('Token %token replaced correctly.', ['%token' => $token]));
       $this->assertEqual($bubbleable_metadata, $metadata_tests[$token]);
     }
   }
@@ -84,7 +84,7 @@ function testTokenReplacementWithMiniPager() {
 
     $this->assertSame(TRUE, $view->get_total_rows, 'The query was set to calculate the total number of rows.');
 
-    $expected = array(
+    $expected = [
       '[view:label]' => 'Test tokens',
       '[view:description]' => 'Test view to token replacement tests.',
       '[view:id]' => 'test_tokens',
@@ -98,13 +98,13 @@ function testTokenReplacementWithMiniPager() {
       '[view:items-per-page]' => '2',
       '[view:current-page]' => '1',
       '[view:page-count]' => '3',
-    );
+    ];
 
     $base_bubbleable_metadata = BubbleableMetadata::createFromObject($view->storage);
 
     foreach ($expected as $token => $expected_output) {
       $bubbleable_metadata = new BubbleableMetadata();
-      $output = $token_handler->replace($token, array('view' => $view), [], $bubbleable_metadata);
+      $output = $token_handler->replace($token, ['view' => $view], [], $bubbleable_metadata);
       $this->assertSame($expected_output, $output, sprintf('Token %s replaced correctly.', $token));
       $this->assertEquals($base_bubbleable_metadata, $bubbleable_metadata);
     }
@@ -119,13 +119,13 @@ function testTokenReplacementNoResults() {
     $view->setDisplay('page_2');
     $this->executeView($view);
 
-    $expected = array(
+    $expected = [
       '[view:page-count]' => '1',
-    );
+    ];
 
     foreach ($expected as $token => $expected_output) {
-      $output = $token_handler->replace($token, array('view' => $view));
-      $this->assertIdentical($output, $expected_output, format_string('Token %token replaced correctly.', array('%token' => $token)));
+      $output = $token_handler->replace($token, ['view' => $view]);
+      $this->assertIdentical($output, $expected_output, format_string('Token %token replaced correctly.', ['%token' => $token]));
     }
   }
 
@@ -138,13 +138,13 @@ function testTokenReplacementNoPath() {
     $view->setDisplay('block_1');
     $this->executeView($view);
 
-    $expected = array(
+    $expected = [
       '[view:url]' => '',
-    );
+    ];
 
     foreach ($expected as $token => $expected_output) {
-      $output = $token_handler->replace($token, array('view' => $view));
-      $this->assertIdentical($output, $expected_output, format_string('Token %token replaced correctly.', array('%token' => $token)));
+      $output = $token_handler->replace($token, ['view' => $view]);
+      $this->assertIdentical($output, $expected_output, format_string('Token %token replaced correctly.', ['%token' => $token]));
     }
   }
 
diff --git a/core/modules/views/tests/src/Kernel/ViewExecutableTest.php b/core/modules/views/tests/src/Kernel/ViewExecutableTest.php
index 01057b47655c894be1af9460298a0ff4fa4c32ad..f843892e5da1c2c4cf490dda4b364590a7aaadbb 100644
--- a/core/modules/views/tests/src/Kernel/ViewExecutableTest.php
+++ b/core/modules/views/tests/src/Kernel/ViewExecutableTest.php
@@ -38,14 +38,14 @@ class ViewExecutableTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_destroy', 'test_executable_displays');
+  public static $testViews = ['test_destroy', 'test_executable_displays'];
 
   /**
    * Properties that should be stored in the configuration.
    *
    * @var array
    */
-  protected $configProperties = array(
+  protected $configProperties = [
     'disabled',
     'name',
     'description',
@@ -54,14 +54,14 @@ class ViewExecutableTest extends ViewsKernelTestBase {
     'label',
     'core',
     'display',
-  );
+  ];
 
   /**
    * Properties that should be stored in the executable.
    *
    * @var array
    */
-  protected $executableProperties = array(
+  protected $executableProperties = [
     'storage',
     'built',
     'executed',
@@ -74,14 +74,14 @@ class ViewExecutableTest extends ViewsKernelTestBase {
     'exposed_raw_input',
     'old_view',
     'parent_views',
-  );
+  ];
 
   protected function setUpFixtures() {
     $this->installEntitySchema('user');
     $this->installEntitySchema('node');
     $this->installEntitySchema('comment');
-    $this->installSchema('comment', array('comment_entity_statistics'));
-    $this->installConfig(array('system', 'field', 'node', 'comment'));
+    $this->installSchema('comment', ['comment_entity_statistics']);
+    $this->installConfig(['system', 'field', 'node', 'comment']);
 
     NodeType::create([
       'type' => 'page',
@@ -90,7 +90,7 @@ protected function setUpFixtures() {
     $this->addDefaultCommentField('node', 'page');
     parent::setUpFixtures();
 
-    $this->installConfig(array('filter'));
+    $this->installConfig(['filter']);
   }
 
   /**
@@ -123,7 +123,7 @@ public function testInitMethods() {
       if ($type == 'relationship') {
         continue;
       }
-      $this->assertTrue(count($view->$type), format_string('Make sure a %type instance got instantiated.', array('%type' => $type)));
+      $this->assertTrue(count($view->$type), format_string('Make sure a %type instance got instantiated.', ['%type' => $type]));
     }
 
     // initHandlers() should create display handlers automatically as well.
@@ -256,7 +256,7 @@ public function testDisplays() {
     $this->assertTrue($view->rowPlugin instanceof Fields);
 
     // Test the newDisplay() method.
-    $view = $this->container->get('entity.manager')->getStorage('view')->create(array('id' => 'test_executable_displays'));
+    $view = $this->container->get('entity.manager')->getStorage('view')->create(['id' => 'test_executable_displays']);
     $executable = $view->getExecutable();
 
     $executable->newDisplay('page');
@@ -289,10 +289,10 @@ public function testPropertyMethods() {
     $this->assertNull($view->usePager());
 
     // Add a pager, initialize, and test.
-    $view->displayHandlers->get('default')->overrideOption('pager', array(
+    $view->displayHandlers->get('default')->overrideOption('pager', [
       'type' => 'full',
-      'options' => array('items_per_page' => 10),
-    ));
+      'options' => ['items_per_page' => 10],
+    ]);
     $view->initPager();
     $this->assertTrue($view->usePager());
 
@@ -302,10 +302,10 @@ public function testPropertyMethods() {
     $this->assertEqual($view->getOffset(), $rand);
 
     // Test the getBaseTable() method.
-    $expected = array(
+    $expected = [
       'views_test_data' => TRUE,
       '#global' => TRUE,
-    );
+    ];
     $this->assertIdentical($view->getBaseTables(), $expected);
 
     // Test response methods.
@@ -386,7 +386,7 @@ protected function getProtectedProperty($instance, $property) {
    */
   public function testGetHandlerTypes() {
     $types = ViewExecutable::getHandlerTypes();
-    foreach (array('field', 'filter', 'argument', 'sort', 'header', 'footer', 'empty') as $type) {
+    foreach (['field', 'filter', 'argument', 'sort', 'header', 'footer', 'empty'] as $type) {
       $this->assertTrue(isset($types[$type]));
       // @todo The key on the display should be footers, headers and empties
       //   or something similar instead of the singular, but so long check for
@@ -430,7 +430,7 @@ public function testValidate() {
       $match = function($value) use ($display) {
         return strpos($value, $display->display['display_title']) !== FALSE;
       };
-      $this->assertTrue(array_filter($validate[$id], $match), format_string('Error message found for @id display', array('@id' => $id)));
+      $this->assertTrue(array_filter($validate[$id], $match), format_string('Error message found for @id display', ['@id' => $id]));
       $count++;
     }
 
diff --git a/core/modules/views/tests/src/Kernel/ViewStorageTest.php b/core/modules/views/tests/src/Kernel/ViewStorageTest.php
index fa264bd731f091fbd381e1975fc604713dd3ead9..29f19963446cafa295f261781979e85c9af81431 100644
--- a/core/modules/views/tests/src/Kernel/ViewStorageTest.php
+++ b/core/modules/views/tests/src/Kernel/ViewStorageTest.php
@@ -21,7 +21,7 @@ class ViewStorageTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  protected $configProperties = array(
+  protected $configProperties = [
     'status',
     'module',
     'id',
@@ -31,7 +31,7 @@ class ViewStorageTest extends ViewsKernelTestBase {
     'label',
     'core',
     'display',
-  );
+  ];
 
   /**
    * The entity type definition.
@@ -52,7 +52,7 @@ class ViewStorageTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view_storage');
+  public static $testViews = ['test_view_storage'];
 
   /**
    * Tests CRUD operations.
@@ -85,11 +85,11 @@ protected function loadTests() {
     // expected properties.
     $this->assertTrue($view instanceof View, 'Single View instance loaded.');
     foreach ($this->configProperties as $property) {
-      $this->assertTrue($view->get($property) !== NULL, format_string('Property: @property loaded onto View.', array('@property' => $property)));
+      $this->assertTrue($view->get($property) !== NULL, format_string('Property: @property loaded onto View.', ['@property' => $property]));
     }
 
     // Check the displays have been loaded correctly from config display data.
-    $expected_displays = array('default', 'block_1', 'page_1');
+    $expected_displays = ['default', 'block_1', 'page_1'];
     $this->assertEqual(array_keys($view->get('display')), $expected_displays, 'The correct display names are present.');
 
     // Check each ViewDisplay object and confirm that it has the correct key and
@@ -101,7 +101,7 @@ protected function loadTests() {
       // exists.
       $original_options = $data['display'][$key];
       foreach ($original_options as $orig_key => $value) {
-        $this->assertIdentical($display[$orig_key], $value, format_string('@key is identical to saved data', array('@key' => $key)));
+        $this->assertIdentical($display[$orig_key], $value, format_string('@key is identical to saved data', ['@key' => $key]));
       }
     }
 
@@ -115,12 +115,12 @@ protected function loadTests() {
    */
   protected function createTests() {
     // Create a new View instance with empty values.
-    $created = $this->controller->create(array());
+    $created = $this->controller->create([]);
 
     $this->assertTrue($created instanceof View, 'Created object is a View.');
     // Check that the View contains all of the properties.
     foreach ($this->configProperties as $property) {
-      $this->assertTrue(property_exists($created, $property), format_string('Property: @property created on View.', array('@property' => $property)));
+      $this->assertTrue(property_exists($created, $property), format_string('Property: @property created on View.', ['@property' => $property]));
     }
 
     // Create a new View instance with config values.
@@ -137,8 +137,8 @@ protected function createTests() {
 
     // Test all properties except displays.
     foreach ($properties as $property) {
-      $this->assertTrue($created->get($property) !== NULL, format_string('Property: @property created on View.', array('@property' => $property)));
-      $this->assertIdentical($values[$property], $created->get($property), format_string('Property value: @property matches configuration value.', array('@property' => $property)));
+      $this->assertTrue($created->get($property) !== NULL, format_string('Property: @property created on View.', ['@property' => $property]));
+      $this->assertIdentical($values[$property], $created->get($property), format_string('Property value: @property matches configuration value.', ['@property' => $property]));
     }
 
     // Check the UUID of the loaded View.
@@ -177,44 +177,44 @@ protected function displayTests() {
    * Tests the display related functions like getDisplaysList().
    */
   protected function displayMethodTests() {
-    $config['display'] = array(
-      'page_1' => array(
-        'display_options' => array('path' => 'test'),
+    $config['display'] = [
+      'page_1' => [
+        'display_options' => ['path' => 'test'],
         'display_plugin' => 'page',
         'id' => 'page_2',
         'display_title' => 'Page 1',
         'position' => 1
-      ),
-      'feed_1' => array(
-        'display_options' => array('path' => 'test.xml'),
+      ],
+      'feed_1' => [
+        'display_options' => ['path' => 'test.xml'],
         'display_plugin' => 'feed',
         'id' => 'feed',
         'display_title' => 'Feed',
         'position' => 2
-      ),
-      'page_2' => array(
-        'display_options' => array('path' => 'test/%/extra'),
+      ],
+      'page_2' => [
+        'display_options' => ['path' => 'test/%/extra'],
         'display_plugin' => 'page',
         'id' => 'page_2',
         'display_title' => 'Page 2',
         'position' => 3
-      )
-    );
+      ]
+    ];
     $view = $this->controller->create($config);
 
     // Tests Drupal\views\Entity\View::addDisplay()
-    $view = $this->controller->create(array());
+    $view = $this->controller->create([]);
     $random_title = $this->randomMachineName();
 
     $id = $view->addDisplay('page', $random_title);
-    $this->assertEqual($id, 'page_1', format_string('Make sure the first display (%id_new) has the expected ID (%id)', array('%id_new' => $id, '%id' => 'page_1')));
+    $this->assertEqual($id, 'page_1', format_string('Make sure the first display (%id_new) has the expected ID (%id)', ['%id_new' => $id, '%id' => 'page_1']));
     $display = $view->get('display');
     $this->assertEqual($display[$id]['display_title'], $random_title);
 
     $random_title = $this->randomMachineName();
     $id = $view->addDisplay('page', $random_title);
     $display = $view->get('display');
-    $this->assertEqual($id, 'page_2', format_string('Make sure the second display (%id_new) has the expected ID (%id)', array('%id_new' => $id, '%id' => 'page_2')));
+    $this->assertEqual($id, 'page_2', format_string('Make sure the second display (%id_new) has the expected ID (%id)', ['%id_new' => $id, '%id' => 'page_2']));
     $this->assertEqual($display[$id]['display_title'], $random_title);
 
     $id = $view->addDisplay('page');
@@ -233,7 +233,7 @@ protected function displayMethodTests() {
     // Tests Drupal\views\Entity\View::generateDisplayId(). Since
     // generateDisplayId() is protected, we have to use reflection to unit-test
     // it.
-    $view = $this->controller->create(array());
+    $view = $this->controller->create([]);
     $ref_generate_display_id = new \ReflectionMethod($view, 'generateDisplayId');
     $ref_generate_display_id->setAccessible(TRUE);
     $this->assertEqual(
@@ -254,38 +254,38 @@ protected function displayMethodTests() {
     );
 
     // Tests item related methods().
-    $view = $this->controller->create(array('base_table' => 'views_test_data'));
+    $view = $this->controller->create(['base_table' => 'views_test_data']);
     $view->addDisplay('default');
     $view = $view->getExecutable();
 
     $display_id = 'default';
-    $expected_items = array();
+    $expected_items = [];
     // Tests addHandler with getItem.
     // Therefore add one item without any options and one item with some
     // options.
     $id1 = $view->addHandler($display_id, 'field', 'views_test_data', 'id');
     $item1 = $view->getHandler($display_id, 'field', 'id');
-    $expected_items[$id1] = $expected_item = array(
+    $expected_items[$id1] = $expected_item = [
       'id' => 'id',
       'table' => 'views_test_data',
       'field' => 'id',
       'plugin_id' => 'numeric',
-    );
+    ];
     $this->assertEqual($item1, $expected_item);
 
-    $options = array(
-      'alter' => array(
+    $options = [
+      'alter' => [
         'text' => $this->randomMachineName()
-      )
-    );
+      ]
+    ];
     $id2 = $view->addHandler($display_id, 'field', 'views_test_data', 'name', $options);
     $item2 = $view->getHandler($display_id, 'field', 'name');
-    $expected_items[$id2] = $expected_item = array(
+    $expected_items[$id2] = $expected_item = [
       'id' => 'name',
       'table' => 'views_test_data',
       'field' => 'name',
       'plugin_id' => 'standard',
-    ) + $options;
+    ] + $options;
     $this->assertEqual($item2, $expected_item);
 
     // Tests the expected fields from the previous additions.
@@ -293,11 +293,11 @@ protected function displayMethodTests() {
 
     // Alter an existing item via setItem and check the result via getItem
     // and getItems.
-    $item = array(
-      'alter' => array(
+    $item = [
+      'alter' => [
         'text' => $this->randomMachineName(),
-      )
-    ) + $item1;
+      ]
+    ] + $item1;
     $expected_items[$id1] = $item;
     $view->setHandler($display_id, 'field', $id1, $item);
     $this->assertEqual($view->getHandler($display_id, 'field', 'id'), $item);
@@ -327,24 +327,24 @@ public function testCreateDuplicate() {
 
     // Check the other properties.
     // @todo Create a reusable property on the base test class for these?
-    $config_properties = array(
+    $config_properties = [
       'disabled',
       'description',
       'tag',
       'base_table',
       'label',
       'core',
-    );
+    ];
 
     foreach ($config_properties as $property) {
-      $this->assertIdentical($view->storage->get($property), $copy->get($property), format_string('@property property is identical.', array('@property' => $property)));
+      $this->assertIdentical($view->storage->get($property), $copy->get($property), format_string('@property property is identical.', ['@property' => $property]));
     }
 
     // Check the displays are the same.
     $copy_display = $copy->get('display');
     foreach ($view->storage->get('display') as $id => $display) {
       // assertIdentical will not work here.
-      $this->assertEqual($display, $copy_display[$id], format_string('The @display display has been copied correctly.', array('@display' => $id)));
+      $this->assertEqual($display, $copy_display[$id], format_string('The @display display has been copied correctly.', ['@display' => $id]));
     }
   }
 
diff --git a/core/modules/views/tests/src/Kernel/ViewsHooksTest.php b/core/modules/views/tests/src/Kernel/ViewsHooksTest.php
index e048454336a804e9f67a6324435c7e7591ef0546..612934e7322253ab72411afa6150b1049eafbdf7 100644
--- a/core/modules/views/tests/src/Kernel/ViewsHooksTest.php
+++ b/core/modules/views/tests/src/Kernel/ViewsHooksTest.php
@@ -19,14 +19,14 @@ class ViewsHooksTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * An array of available views hooks to test.
    *
    * @var array
    */
-  protected static $hooks = array (
+  protected static $hooks =  [
     'views_data' => 'all',
     'views_data_alter' => 'alter',
     'views_query_substitutions' => 'view',
@@ -41,7 +41,7 @@ class ViewsHooksTest extends ViewsKernelTestBase {
     'views_post_render' => 'view',
     'views_query_alter'  => 'view',
     'views_invalidate_cache' => 'all',
-  );
+  ];
 
   /**
    * The module handler to use for invoking hooks.
@@ -65,28 +65,28 @@ public function testHooks() {
 
     // Test each hook is found in the implementations array and is invoked.
     foreach (static::$hooks as $hook => $type) {
-      $this->assertTrue($this->moduleHandler->implementsHook('views_test_data', $hook), format_string('The hook @hook was registered.', array('@hook' => $hook)));
+      $this->assertTrue($this->moduleHandler->implementsHook('views_test_data', $hook), format_string('The hook @hook was registered.', ['@hook' => $hook]));
 
       if ($hook == 'views_post_render') {
-        $this->moduleHandler->invoke('views_test_data', $hook, array($view, &$view->display_handler->output, $view->display_handler->getPlugin('cache')));
+        $this->moduleHandler->invoke('views_test_data', $hook, [$view, &$view->display_handler->output, $view->display_handler->getPlugin('cache')]);
         continue;
       }
 
       switch ($type) {
         case 'view':
-          $this->moduleHandler->invoke('views_test_data', $hook, array($view));
+          $this->moduleHandler->invoke('views_test_data', $hook, [$view]);
           break;
 
         case 'alter':
-          $data = array();
-          $this->moduleHandler->invoke('views_test_data', $hook, array($data));
+          $data = [];
+          $this->moduleHandler->invoke('views_test_data', $hook, [$data]);
           break;
 
         default:
           $this->moduleHandler->invoke('views_test_data', $hook);
       }
 
-      $this->assertTrue($this->container->get('state')->get('views_hook_test_' . $hook), format_string('The %hook hook was invoked.', array('%hook' => $hook)));
+      $this->assertTrue($this->container->get('state')->get('views_hook_test_' . $hook), format_string('The %hook hook was invoked.', ['%hook' => $hook]));
       // Reset the module implementations cache, so we ensure that the
       // .views.inc file is loaded actively.
       $this->moduleHandler->resetImplementations();
diff --git a/core/modules/views/tests/src/Kernel/Wizard/WizardPluginBaseKernelTest.php b/core/modules/views/tests/src/Kernel/Wizard/WizardPluginBaseKernelTest.php
index 27f21c220ce688a8fc812a8416660766dc7b4173..beb7b486d5023a8815e156232404472d27500c5b 100644
--- a/core/modules/views/tests/src/Kernel/Wizard/WizardPluginBaseKernelTest.php
+++ b/core/modules/views/tests/src/Kernel/Wizard/WizardPluginBaseKernelTest.php
@@ -20,7 +20,7 @@ class WizardPluginBaseKernelTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('language', 'system', 'user', 'views_ui');
+  public static $modules = ['language', 'system', 'user', 'views_ui'];
 
   /**
    * Contains thw wizard plugin manager.
@@ -32,9 +32,9 @@ class WizardPluginBaseKernelTest extends ViewsKernelTestBase {
   protected function setUp($import_test_views = TRUE) {
     parent::setUp();
 
-    $this->installConfig(array('language'));
+    $this->installConfig(['language']);
 
-    $this->wizard = $this->container->get('plugin.manager.views.wizard')->createInstance('standard:views_test_data', array());
+    $this->wizard = $this->container->get('plugin.manager.views.wizard')->createInstance('standard:views_test_data', []);
   }
 
   /**
@@ -43,7 +43,7 @@ protected function setUp($import_test_views = TRUE) {
    * @see \Drupal\views\Plugin\views\wizard\WizardPluginBase
    */
   public function testCreateView() {
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $form = $this->wizard->buildForm($form, $form_state);
     $random_id = strtolower($this->randomMachineName());
diff --git a/core/modules/views/tests/src/Unit/Controller/ViewAjaxControllerTest.php b/core/modules/views/tests/src/Unit/Controller/ViewAjaxControllerTest.php
index d6b2a1e798d61348200e56737cc9d5a1b0f06de6..5483ee47bb01d56a79793dc232e21bff8bbf22c4 100644
--- a/core/modules/views/tests/src/Unit/Controller/ViewAjaxControllerTest.php
+++ b/core/modules/views/tests/src/Unit/Controller/ViewAjaxControllerTest.php
@@ -228,7 +228,7 @@ public function testAjaxViewWithArguments() {
     list($view, $executable) = $this->setupValidMocks();
     $executable->expects($this->once())
       ->method('preview')
-      ->with('page_1', array('arg1', 'arg2'));
+      ->with('page_1', ['arg1', 'arg2']);
 
     $response = $this->viewAjaxController->ajaxView($request);
     $this->assertTrue($response instanceof ViewAjaxResponse);
@@ -249,7 +249,7 @@ public function testAjaxViewWithEmptyArguments() {
     list($view, $executable) = $this->setupValidMocks();
     $executable->expects($this->once())
       ->method('preview')
-      ->with('page_1', $this->identicalTo(array('arg1', NULL)));
+      ->with('page_1', $this->identicalTo(['arg1', NULL]));
 
     $response = $this->viewAjaxController->ajaxView($request);
     $this->assertTrue($response instanceof ViewAjaxResponse);
@@ -317,14 +317,14 @@ protected function setupValidMocks() {
       ->will($this->returnValue(TRUE));
     $executable->expects($this->once())
       ->method('preview')
-      ->will($this->returnValue(array('#markup' => 'View result')));
+      ->will($this->returnValue(['#markup' => 'View result']));
 
     $this->executableFactory->expects($this->once())
       ->method('get')
       ->with($view)
       ->will($this->returnValue($executable));
 
-    return array($view, $executable);
+    return [$view, $executable];
   }
 
   /**
diff --git a/core/modules/views/tests/src/Unit/EntityViewsDataTest.php b/core/modules/views/tests/src/Unit/EntityViewsDataTest.php
index 276fc5c0d8e7aa69fdf298463a51b40ff664aee7..74bcc083e123c88b811a7b987e0577b7f933e123 100644
--- a/core/modules/views/tests/src/Unit/EntityViewsDataTest.php
+++ b/core/modules/views/tests/src/Unit/EntityViewsDataTest.php
@@ -92,7 +92,7 @@ protected function setUp() {
     $typed_data_manager->expects($this->any())
       ->method('getDefinition')
       ->with($this->equalTo('field_item:string_long'))
-      ->willReturn(array('class' => '\Drupal\Core\Field\Plugin\Field\FieldType\StringLongItem'));
+      ->willReturn(['class' => '\Drupal\Core\Field\Plugin\Field\FieldType\StringLongItem']);
 
     $this->baseEntityType = new TestEntityType([
       'base_table' => 'entity_test',
@@ -147,16 +147,16 @@ protected function setupBaseFields(array $base_fields) {
       ->setLabel('Description')
       ->setDescription('A description of the term.')
       ->setTranslatable(TRUE)
-      ->setDisplayOptions('view', array(
+      ->setDisplayOptions('view', [
           'label' => 'hidden',
           'type' => 'text_default',
           'weight' => 0,
-        ))
+        ])
       ->setDisplayConfigurable('view', TRUE)
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
           'type' => 'text_textfield',
           'weight' => 0,
-        ))
+        ])
       ->setDisplayConfigurable('form', TRUE);
 
     // Add a URL field; this example is from the Comment entity.
diff --git a/core/modules/views/tests/src/Unit/EventSubscriber/RouteSubscriberTest.php b/core/modules/views/tests/src/Unit/EventSubscriber/RouteSubscriberTest.php
index f9d3add232979e1e911f6b1a0829d978bc034bb4..c89554a77cd746536d02306197520245fccfce52 100644
--- a/core/modules/views/tests/src/Unit/EventSubscriber/RouteSubscriberTest.php
+++ b/core/modules/views/tests/src/Unit/EventSubscriber/RouteSubscriberTest.php
@@ -68,16 +68,16 @@ public function testRouteRebuildFinished() {
 
     $display_1->expects($this->once())
       ->method('collectRoutes')
-      ->will($this->returnValue(array('test_id.page_1' => 'views.test_id.page_1')));
+      ->will($this->returnValue(['test_id.page_1' => 'views.test_id.page_1']));
     $display_2->expects($this->once())
       ->method('collectRoutes')
-      ->will($this->returnValue(array('test_id.page_2' => 'views.test_id.page_2')));
+      ->will($this->returnValue(['test_id.page_2' => 'views.test_id.page_2']));
 
     $this->routeSubscriber->routes();
 
     $this->state->expects($this->once())
       ->method('set')
-      ->with('views.view_route_names', array('test_id.page_1' => 'views.test_id.page_1', 'test_id.page_2' => 'views.test_id.page_2'));
+      ->with('views.view_route_names', ['test_id.page_1' => 'views.test_id.page_1', 'test_id.page_2' => 'views.test_id.page_2']);
     $this->routeSubscriber->routeRebuildFinished();
   }
 
@@ -89,8 +89,8 @@ public function testRouteRebuildFinished() {
   public function testOnAlterRoutes() {
     $collection = new RouteCollection();
     // The first route will be overridden later.
-    $collection->add('test_route', new Route('test_route', array('_controller' => 'Drupal\Tests\Core\Controller\TestController')));
-    $route_2 = new Route('test_route/example', array('_controller' => 'Drupal\Tests\Core\Controller\TestController'));
+    $collection->add('test_route', new Route('test_route', ['_controller' => 'Drupal\Tests\Core\Controller\TestController']));
+    $route_2 = new Route('test_route/example', ['_controller' => 'Drupal\Tests\Core\Controller\TestController']);
     $collection->add('test_route_2', $route_2);
 
     $route_event = new RouteBuildEvent($collection, 'views');
@@ -128,7 +128,7 @@ public function testOnAlterRoutes() {
 
     $this->state->expects($this->once())
       ->method('set')
-      ->with('views.view_route_names', array('test_id.page_1' => 'test_route', 'test_id.page_2' => 'views.test_id.page_2'));
+      ->with('views.view_route_names', ['test_id.page_1' => 'test_route', 'test_id.page_2' => 'views.test_id.page_2']);
 
     $collection = $route_event->getRouteCollection();
     $this->assertEquals(['test_route', 'test_route_2', 'views.test_id.page_2'], array_keys($collection->all()));
@@ -163,11 +163,11 @@ protected function setupMocks() {
 
     $executable->expects($this->any())
       ->method('setDisplay')
-      ->will($this->returnValueMap(array(
-        array('page_1', TRUE),
-        array('page_2', TRUE),
-        array('page_3', FALSE),
-      )));
+      ->will($this->returnValueMap([
+        ['page_1', TRUE],
+        ['page_2', TRUE],
+        ['page_3', FALSE],
+      ]));
 
     // Ensure that only the first two displays are actually called.
     $display_1 = $this->getMock('Drupal\views\Plugin\views\display\DisplayRouterInterface');
@@ -178,18 +178,18 @@ protected function setupMocks() {
       ->getMock();
     $display_collection->expects($this->any())
       ->method('get')
-      ->will($this->returnValueMap(array(
-        array('page_1', $display_1),
-        array('page_2', $display_2),
-      )));
+      ->will($this->returnValueMap([
+        ['page_1', $display_1],
+        ['page_2', $display_2],
+      ]));
     $executable->displayHandlers = $display_collection;
 
-    $this->routeSubscriber->applicableViews = array();
-    $this->routeSubscriber->applicableViews[] = array('test_id', 'page_1');
-    $this->routeSubscriber->applicableViews[] = array('test_id', 'page_2');
-    $this->routeSubscriber->applicableViews[] = array('test_id', 'page_3');
+    $this->routeSubscriber->applicableViews = [];
+    $this->routeSubscriber->applicableViews[] = ['test_id', 'page_1'];
+    $this->routeSubscriber->applicableViews[] = ['test_id', 'page_2'];
+    $this->routeSubscriber->applicableViews[] = ['test_id', 'page_3'];
 
-    return array($display_1, $display_2);
+    return [$display_1, $display_2];
   }
 
 }
diff --git a/core/modules/views/tests/src/Unit/Plugin/Block/ViewsBlockTest.php b/core/modules/views/tests/src/Unit/Plugin/Block/ViewsBlockTest.php
index b269f9b292731e55a0f0a1f49c7400ee9739775b..cbe6adef86baca90e40ba38e3056a29efd7c9144 100644
--- a/core/modules/views/tests/src/Unit/Plugin/Block/ViewsBlockTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/Block/ViewsBlockTest.php
@@ -62,7 +62,7 @@ protected function setUp() {
     $condition_plugin_manager = $this->getMock('Drupal\Core\Executable\ExecutableManagerInterface');
     $condition_plugin_manager->expects($this->any())
       ->method('getDefinitions')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $container = new ContainerBuilder();
     $container->set('plugin.manager.condition', $condition_plugin_manager);
     \Drupal::setContainer($container);
@@ -136,15 +136,15 @@ protected function setUp() {
    */
   public function testBuild() {
     $output = $this->randomMachineName(100);
-    $build = array('view_build' => $output, '#view_id' => 'test_view', '#view_display_plugin_class' => '\Drupal\views\Plugin\views\display\Block', '#view_display_show_admin_links' => FALSE, '#view_display_plugin_id' => 'block', '#pre_rendered' => TRUE);
+    $build = ['view_build' => $output, '#view_id' => 'test_view', '#view_display_plugin_class' => '\Drupal\views\Plugin\views\display\Block', '#view_display_show_admin_links' => FALSE, '#view_display_plugin_id' => 'block', '#pre_rendered' => TRUE];
     $this->executable->expects($this->once())
       ->method('buildRenderable')
       ->with('block_1', [])
       ->willReturn($build);
 
     $block_id = 'views_block:test_view-block_1';
-    $config = array();
-    $definition = array();
+    $config = [];
+    $definition = [];
 
     $definition['provider'] = 'views';
     $plugin = new ViewsBlock($config, $block_id, $definition, $this->executableFactory, $this->storage, $this->account);
@@ -187,13 +187,13 @@ public function testBuildFailed() {
       ->willReturn($output);
 
     $block_id = 'views_block:test_view-block_1';
-    $config = array();
-    $definition = array();
+    $config = [];
+    $definition = [];
 
     $definition['provider'] = 'views';
     $plugin = new ViewsBlock($config, $block_id, $definition, $this->executableFactory, $this->storage, $this->account);
 
-    $this->assertEquals(array(), $plugin->build());
+    $this->assertEquals([], $plugin->build());
   }
 
 }
diff --git a/core/modules/views/tests/src/Unit/Plugin/Derivative/ViewsLocalTaskTest.php b/core/modules/views/tests/src/Unit/Plugin/Derivative/ViewsLocalTaskTest.php
index af9a683f0b5807be3a6330fe84e3e44ff117c969..7ecf9ef0417a9f62e8ba42882b8ade0c2c9040da 100644
--- a/core/modules/views/tests/src/Unit/Plugin/Derivative/ViewsLocalTaskTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/Derivative/ViewsLocalTaskTest.php
@@ -37,10 +37,10 @@ class ViewsLocalTaskTest extends UnitTestCase {
    */
   protected $viewStorage;
 
-  protected $baseDefinition = array(
+  protected $baseDefinition = [
     'class' => '\Drupal\views\Plugin\Menu\LocalTask\ViewsLocalTask',
     'deriver' => '\Drupal\views\Plugin\Derivative\ViewsLocalTask'
-  );
+  ];
 
   /**
    * The tested local task derivative class.
@@ -63,11 +63,11 @@ protected function setUp() {
    * @see \Drupal\views\Plugin\Derivative\ViewsLocalTask::getDerivativeDefinitions()
    */
   public function testGetDerivativeDefinitionsWithoutHookMenuViews() {
-    $result = array();
+    $result = [];
     $this->localTaskDerivative->setApplicableMenuViews($result);
 
     $definitions = $this->localTaskDerivative->getDerivativeDefinitions($this->baseDefinition);
-    $this->assertEquals(array(), $definitions);
+    $this->assertEquals([], $definitions);
   }
 
   /**
@@ -78,13 +78,13 @@ public function testGetDerivativeDefinitionsWithoutLocalTask() {
       ->disableOriginalConstructor()
       ->getMock();
     $display_plugin = $this->getMockBuilder('Drupal\views\Plugin\views\display\PathPluginBase')
-      ->setMethods(array('getOption'))
+      ->setMethods(['getOption'])
       ->disableOriginalConstructor()
       ->getMockForAbstractClass();
     $display_plugin->expects($this->once())
       ->method('getOption')
       ->with('menu')
-      ->will($this->returnValue(array('type' => 'normal')));
+      ->will($this->returnValue(['type' => 'normal']));
     $executable->display_handler = $display_plugin;
 
     $storage = $this->getMockBuilder('Drupal\views\Entity\View')
@@ -106,7 +106,7 @@ public function testGetDerivativeDefinitionsWithoutLocalTask() {
     $this->localTaskDerivative->setApplicableMenuViews($result);
 
     $definitions = $this->localTaskDerivative->getDerivativeDefinitions($this->baseDefinition);
-    $this->assertEquals(array(), $definitions);
+    $this->assertEquals([], $definitions);
   }
 
   /**
@@ -133,20 +133,20 @@ public function testGetDerivativeDefinitionsWithLocalTask() {
       ->willReturn($storage);
 
     $display_plugin = $this->getMockBuilder('Drupal\views\Plugin\views\display\PathPluginBase')
-      ->setMethods(array('getOption'))
+      ->setMethods(['getOption'])
       ->disableOriginalConstructor()
       ->getMockForAbstractClass();
     $display_plugin->expects($this->once())
       ->method('getOption')
       ->with('menu')
-      ->will($this->returnValue(array('type' => 'tab', 'weight' => 12, 'title' => 'Example title')));
+      ->will($this->returnValue(['type' => 'tab', 'weight' => 12, 'title' => 'Example title']));
     $executable->display_handler = $display_plugin;
 
     $result = [['example_view', 'page_1']];
     $this->localTaskDerivative->setApplicableMenuViews($result);
 
     // Mock the view route names state.
-    $view_route_names = array();
+    $view_route_names = [];
     $view_route_names['example_view.page_1'] = 'view.example_view.page_1';
     $this->state->expects($this->once())
       ->method('get')
@@ -186,20 +186,20 @@ public function testGetDerivativeDefinitionsWithOverrideRoute() {
       ->willReturn($storage);
 
     $display_plugin = $this->getMockBuilder('Drupal\views\Plugin\views\display\PathPluginBase')
-      ->setMethods(array('getOption'))
+      ->setMethods(['getOption'])
       ->disableOriginalConstructor()
       ->getMockForAbstractClass();
     $display_plugin->expects($this->once())
       ->method('getOption')
       ->with('menu')
-      ->will($this->returnValue(array('type' => 'tab', 'weight' => 12)));
+      ->will($this->returnValue(['type' => 'tab', 'weight' => 12]));
     $executable->display_handler = $display_plugin;
 
     $result = [['example_view', 'page_1']];
     $this->localTaskDerivative->setApplicableMenuViews($result);
 
     // Mock the view route names state.
-    $view_route_names = array();
+    $view_route_names = [];
     // Setup a view which overrides an existing route.
     $view_route_names['example_view.page_1'] = 'example_overridden_route';
     $this->state->expects($this->once())
@@ -235,20 +235,20 @@ public function testGetDerivativeDefinitionsWithDefaultLocalTask() {
       ->willReturn($storage);
 
     $display_plugin = $this->getMockBuilder('Drupal\views\Plugin\views\display\PathPluginBase')
-      ->setMethods(array('getOption'))
+      ->setMethods(['getOption'])
       ->disableOriginalConstructor()
       ->getMockForAbstractClass();
     $display_plugin->expects($this->exactly(2))
       ->method('getOption')
       ->with('menu')
-      ->will($this->returnValue(array('type' => 'default tab', 'weight' => 12, 'title' => 'Example title')));
+      ->will($this->returnValue(['type' => 'default tab', 'weight' => 12, 'title' => 'Example title']));
     $executable->display_handler = $display_plugin;
 
     $result = [['example_view', 'page_1']];
     $this->localTaskDerivative->setApplicableMenuViews($result);
 
     // Mock the view route names state.
-    $view_route_names = array();
+    $view_route_names = [];
     $view_route_names['example_view.page_1'] = 'view.example_view.page_1';
     $this->state->expects($this->exactly(2))
       ->method('get')
@@ -304,13 +304,13 @@ public function testGetDerivativeDefinitionsWithExistingLocalTask() {
       ->willReturn($storage);
 
     $display_plugin = $this->getMockBuilder('Drupal\views\Plugin\views\display\PathPluginBase')
-      ->setMethods(array('getOption', 'getPath'))
+      ->setMethods(['getOption', 'getPath'])
       ->disableOriginalConstructor()
       ->getMockForAbstractClass();
     $display_plugin->expects($this->exactly(2))
       ->method('getOption')
       ->with('menu')
-      ->will($this->returnValue(array('type' => 'tab', 'weight' => 12, 'title' => 'Example title')));
+      ->will($this->returnValue(['type' => 'tab', 'weight' => 12, 'title' => 'Example title']));
     $display_plugin->expects($this->once())
       ->method('getPath')
       ->will($this->returnValue('path/example'));
@@ -320,7 +320,7 @@ public function testGetDerivativeDefinitionsWithExistingLocalTask() {
     $this->localTaskDerivative->setApplicableMenuViews($result);
 
     // Mock the view route names state.
-    $view_route_names = array();
+    $view_route_names = [];
     $view_route_names['example_view.page_1'] = 'view.example_view.page_1';
     $this->state->expects($this->exactly(2))
       ->method('get')
@@ -336,11 +336,11 @@ public function testGetDerivativeDefinitionsWithExistingLocalTask() {
       ->will($this->returnValue($route_collection));
 
     // Setup the existing local task of the test_route.
-    $definitions['test_route_tab'] = $other_tab = array(
+    $definitions['test_route_tab'] = $other_tab = [
       'route_name' => 'test_route',
       'title' => 'Test route',
       'base_route' => 'test_route',
-    );
+    ];
 
     $definitions += $this->localTaskDerivative->getDerivativeDefinitions($this->baseDefinition);
 
diff --git a/core/modules/views/tests/src/Unit/Plugin/area/EntityTest.php b/core/modules/views/tests/src/Unit/Plugin/area/EntityTest.php
index 3b0aebf190a95f4d1cc9b51b2fc3d944f7be5d4a..556aef91a9d022ffd2e992c9bd171d003ecc708a 100644
--- a/core/modules/views/tests/src/Unit/Plugin/area/EntityTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/area/EntityTest.php
@@ -82,7 +82,7 @@ protected function setUp() {
       ->getMock();
     $this->executable->style_plugin = $this->stylePlugin;
 
-    $this->entityHandler = new Entity(array(), 'entity', array('entity_type' => 'entity_test'), $this->entityManager);
+    $this->entityHandler = new Entity([], 'entity', ['entity_type' => 'entity_test'], $this->entityManager);
 
     $this->display->expects($this->any())
       ->method('getPlugin')
diff --git a/core/modules/views/tests/src/Unit/Plugin/area/MessagesTest.php b/core/modules/views/tests/src/Unit/Plugin/area/MessagesTest.php
index 07dca650ea3df177068b604e79c882770b93351c..1c6728da37a0821e3bb3b72382306bc02926994b 100644
--- a/core/modules/views/tests/src/Unit/Plugin/area/MessagesTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/area/MessagesTest.php
@@ -31,7 +31,7 @@ class MessagesTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
 
-    $this->messagesHandler = new Messages(array(), 'result', array());
+    $this->messagesHandler = new Messages([], 'result', []);
   }
 
   /**
@@ -43,15 +43,15 @@ protected function setUp() {
   public function testRender() {
     // The handler is configured to show with empty views by default, so should
     // appear.
-    $this->assertSame(array('#type' => 'status_messages'), $this->messagesHandler->render());
+    $this->assertSame(['#type' => 'status_messages'], $this->messagesHandler->render());
 
     // Turn empty off, and make sure it isn't rendered.
     $this->messagesHandler->options['empty'] = FALSE;
     // $empty parameter passed to render will still be FALSE, so should still
     // appear.
-    $this->assertSame(array('#type' => 'status_messages'), $this->messagesHandler->render());
+    $this->assertSame(['#type' => 'status_messages'], $this->messagesHandler->render());
     // Should now be empty as both the empty option and parameter are empty.
-    $this->assertSame(array(), $this->messagesHandler->render(TRUE));
+    $this->assertSame([], $this->messagesHandler->render(TRUE));
   }
 
 }
diff --git a/core/modules/views/tests/src/Unit/Plugin/area/ResultTest.php b/core/modules/views/tests/src/Unit/Plugin/area/ResultTest.php
index 164d4110a68b8f7b2ebdf6d6044758120192f7eb..a94b672af577d3dd10729c24984bb45da2cfe0c4 100644
--- a/core/modules/views/tests/src/Unit/Plugin/area/ResultTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/area/ResultTest.php
@@ -79,7 +79,7 @@ public function testQuery() {
   public function testResultArea($content, $expected, $items_per_page = 0) {
     $this->setupViewPager($items_per_page);
     $this->resultHandler->options['content'] = $content;
-    $this->assertEquals(array('#markup' => $expected), $this->resultHandler->render());
+    $this->assertEquals(['#markup' => $expected], $this->resultHandler->render());
   }
 
   /**
@@ -88,25 +88,25 @@ public function testResultArea($content, $expected, $items_per_page = 0) {
    * @return array
    */
   public function providerTestResultArea() {
-    return array(
-      array('@label', 'ResultTest'),
-      array('@start', '1'),
-      array('@start', '1', 1),
-      array('@end', '100'),
-      array('@end', '1', 1),
-      array('@total', '100'),
-      array('@total', '100', 1),
-      array('@per_page', '0'),
-      array('@per_page', '1', 1),
-      array('@current_page', '1'),
-      array('@current_page', '1', 1),
-      array('@current_record_count', '100'),
-      array('@current_record_count', '1', 1),
-      array('@page_count', '1'),
-      array('@page_count', '100', 1),
-      array('@start | @end | @total', '1 | 100 | 100'),
-      array('@start | @end | @total', '1 | 1 | 100', 1),
-    );
+    return [
+      ['@label', 'ResultTest'],
+      ['@start', '1'],
+      ['@start', '1', 1],
+      ['@end', '100'],
+      ['@end', '1', 1],
+      ['@total', '100'],
+      ['@total', '100', 1],
+      ['@per_page', '0'],
+      ['@per_page', '1', 1],
+      ['@current_page', '1'],
+      ['@current_page', '1', 1],
+      ['@current_record_count', '100'],
+      ['@current_record_count', '1', 1],
+      ['@page_count', '1'],
+      ['@page_count', '100', 1],
+      ['@start | @end | @total', '1 | 100 | 100'],
+      ['@start | @end | @total', '1 | 1 | 100', 1],
+    ];
   }
 
   /**
@@ -127,7 +127,7 @@ protected function setupViewPager($items_per_page = 0) {
     $this->view->pager = $pager->reveal();
     $this->view->style_plugin = new \stdClass();
     $this->view->total_rows = 100;
-    $this->view->result = array(1, 2, 3, 4, 5);
+    $this->view->result = [1, 2, 3, 4, 5];
   }
 
 }
diff --git a/core/modules/views/tests/src/Unit/Plugin/area/ViewTest.php b/core/modules/views/tests/src/Unit/Plugin/area/ViewTest.php
index f472ab28456baefcafaedc7374b11277d40a34ca..91d52829c5a1321e7c40181aaecc99bd577b141f 100644
--- a/core/modules/views/tests/src/Unit/Plugin/area/ViewTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/area/ViewTest.php
@@ -31,7 +31,7 @@ class ViewTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
     $this->entityStorage = $this->getMock('Drupal\Core\Entity\EntityStorageInterface');
-    $this->viewHandler = new ViewAreaPlugin(array(), 'view', array(), $this->entityStorage);
+    $this->viewHandler = new ViewAreaPlugin([], 'view', [], $this->entityStorage);
     $this->viewHandler->view = $this->getMockBuilder('Drupal\views\ViewExecutable')
       ->disableOriginalConstructor()
       ->getMock();
@@ -60,10 +60,10 @@ public function testCalculateDependencies() {
 
 
     $this->viewHandler->options['view_to_insert'] = 'other:default';
-    $this->assertArrayEquals(array('config' => array('view.other')), $this->viewHandler->calculateDependencies());
+    $this->assertArrayEquals(['config' => ['view.other']], $this->viewHandler->calculateDependencies());
 
     $this->viewHandler->options['view_to_insert'] = 'this:default';
-    $this->assertArrayEquals(array(), $this->viewHandler->calculateDependencies());
+    $this->assertArrayEquals([], $this->viewHandler->calculateDependencies());
   }
 
 }
diff --git a/core/modules/views/tests/src/Unit/Plugin/argument_default/QueryParameterTest.php b/core/modules/views/tests/src/Unit/Plugin/argument_default/QueryParameterTest.php
index 40016941064ce8a4a3ac6d0eca9fdf555fc3fd72..8bacd3dcdb5ac23103900640859f09784ae78371 100644
--- a/core/modules/views/tests/src/Unit/Plugin/argument_default/QueryParameterTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/argument_default/QueryParameterTest.php
@@ -28,7 +28,7 @@ public function testGetArgument($options, Request $request, $expected) {
       ->disableOriginalConstructor()
       ->getMock();
 
-    $raw = new QueryParameter(array(), 'query_parameter', array());
+    $raw = new QueryParameter([], 'query_parameter', []);
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals($expected, $raw->getArgument());
   }
diff --git a/core/modules/views/tests/src/Unit/Plugin/argument_default/RawTest.php b/core/modules/views/tests/src/Unit/Plugin/argument_default/RawTest.php
index 365e469432916fcbff267700af1d7a255ae9a1c2..62c89a9a8780a27c63ef5a57cd739014ccb45316 100644
--- a/core/modules/views/tests/src/Unit/Plugin/argument_default/RawTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/argument_default/RawTest.php
@@ -39,34 +39,34 @@ public function testGetArgument() {
 
     // Don't use aliases. Check against NULL and nonexistent path component
     // values in addition to valid ones.
-    $raw = new Raw(array(), 'raw', array(), $alias_manager, $current_path);
-    $options = array(
+    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
+    $options = [
       'use_alias' => FALSE,
-    );
+    ];
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals(NULL, $raw->getArgument());
 
-    $raw = new Raw(array(), 'raw', array(), $alias_manager, $current_path);
-    $options = array(
+    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
+    $options = [
       'use_alias' => FALSE,
       'index' => 0,
-    );
+    ];
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals('test', $raw->getArgument());
 
-    $raw = new Raw(array(), 'raw', array(), $alias_manager, $current_path);
-    $options = array(
+    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
+    $options = [
       'use_alias' => FALSE,
       'index' => 1,
-    );
+    ];
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals('example', $raw->getArgument());
 
-    $raw = new Raw(array(), 'raw', array(), $alias_manager, $current_path);
-    $options = array(
+    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
+    $options = [
       'use_alias' => FALSE,
       'index' => 2,
-    );
+    ];
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals(NULL, $raw->getArgument());
 
@@ -77,34 +77,34 @@ public function testGetArgument() {
       ->with($this->equalTo('/test/example'))
       ->will($this->returnValue('/other/example'));
 
-    $raw = new Raw(array(), 'raw', array(), $alias_manager, $current_path);
-    $options = array(
+    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
+    $options = [
       'use_alias' => TRUE,
-    );
+    ];
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals(NULL, $raw->getArgument());
 
-    $raw = new Raw(array(), 'raw', array(), $alias_manager, $current_path);
-    $options = array(
+    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
+    $options = [
       'use_alias' => TRUE,
       'index' => 0,
-    );
+    ];
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals('other', $raw->getArgument());
 
-    $raw = new Raw(array(), 'raw', array(), $alias_manager, $current_path);
-    $options = array(
+    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
+    $options = [
       'use_alias' => TRUE,
       'index' => 1,
-    );
+    ];
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals('example', $raw->getArgument());
 
-    $raw = new Raw(array(), 'raw', array(), $alias_manager, $current_path);
-    $options = array(
+    $raw = new Raw([], 'raw', [], $alias_manager, $current_path);
+    $options = [
       'use_alias' => TRUE,
       'index' => 2,
-    );
+    ];
     $raw->init($view, $display_plugin, $options);
     $this->assertEquals(NULL, $raw->getArgument());
   }
diff --git a/core/modules/views/tests/src/Unit/Plugin/argument_validator/EntityTest.php b/core/modules/views/tests/src/Unit/Plugin/argument_validator/EntityTest.php
index f9ca7d873caa37ce6c67ba6a0dc9fcc2ecc1c099..13a7bc952d89565bf79183b34bc5249fa31e054d 100644
--- a/core/modules/views/tests/src/Unit/Plugin/argument_validator/EntityTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/argument_validator/EntityTest.php
@@ -47,43 +47,43 @@ protected function setUp() {
 
     $this->entityManager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
 
-    $mock_entity = $this->getMockForAbstractClass('Drupal\Core\Entity\Entity', array(), '', FALSE, TRUE, TRUE, array('bundle', 'access'));
+    $mock_entity = $this->getMockForAbstractClass('Drupal\Core\Entity\Entity', [], '', FALSE, TRUE, TRUE, ['bundle', 'access']);
     $mock_entity->expects($this->any())
       ->method('bundle')
       ->will($this->returnValue('test_bundle'));
     $mock_entity->expects($this->any())
       ->method('access')
-      ->will($this->returnValueMap(array(
-        array('test_op', NULL, FALSE, TRUE),
-        array('test_op_2', NULL, FALSE, FALSE),
-        array('test_op_3', NULL, FALSE, TRUE),
-      )));
+      ->will($this->returnValueMap([
+        ['test_op', NULL, FALSE, TRUE],
+        ['test_op_2', NULL, FALSE, FALSE],
+        ['test_op_3', NULL, FALSE, TRUE],
+      ]));
 
-    $mock_entity_bundle_2 = $this->getMockForAbstractClass('Drupal\Core\Entity\Entity', array(), '', FALSE, TRUE, TRUE, array('bundle', 'access'));
+    $mock_entity_bundle_2 = $this->getMockForAbstractClass('Drupal\Core\Entity\Entity', [], '', FALSE, TRUE, TRUE, ['bundle', 'access']);
     $mock_entity_bundle_2->expects($this->any())
       ->method('bundle')
       ->will($this->returnValue('test_bundle_2'));
     $mock_entity_bundle_2->expects($this->any())
       ->method('access')
-      ->will($this->returnValueMap(array(
-        array('test_op', NULL, FALSE, FALSE),
-        array('test_op_2', NULL, FALSE, FALSE),
-        array('test_op_3', NULL, FALSE, TRUE),
-      )));
+      ->will($this->returnValueMap([
+        ['test_op', NULL, FALSE, FALSE],
+        ['test_op_2', NULL, FALSE, FALSE],
+        ['test_op_3', NULL, FALSE, TRUE],
+      ]));
 
 
     $storage = $this->getMock('Drupal\Core\Entity\EntityStorageInterface');
 
     // Setup values for IDs passed as strings or numbers.
-    $value_map = array(
-      array(array(), array()),
-      array(array(1), array(1 => $mock_entity)),
-      array(array('1'), array(1 => $mock_entity)),
-      array(array(1, 2), array(1 => $mock_entity, 2 => $mock_entity_bundle_2)),
-      array(array('1', '2'), array(1 => $mock_entity, 2 => $mock_entity_bundle_2)),
-      array(array(2), array(2 => $mock_entity_bundle_2)),
-      array(array('2'), array(2 => $mock_entity_bundle_2)),
-    );
+    $value_map = [
+      [[], []],
+      [[1], [1 => $mock_entity]],
+      [['1'], [1 => $mock_entity]],
+      [[1, 2], [1 => $mock_entity, 2 => $mock_entity_bundle_2]],
+      [['1', '2'], [1 => $mock_entity, 2 => $mock_entity_bundle_2]],
+      [[2], [2 => $mock_entity_bundle_2]],
+      [['2'], [2 => $mock_entity_bundle_2]],
+    ];
     $storage->expects($this->any())
       ->method('loadMultiple')
       ->will($this->returnValueMap($value_map));
@@ -100,11 +100,11 @@ protected function setUp() {
       ->disableOriginalConstructor()
       ->getMock();
 
-    $definition = array(
+    $definition = [
       'entity_type' => 'entity_test',
-    );
+    ];
 
-    $this->argumentValidator = new Entity(array(), 'entity_test', $definition, $this->entityManager);
+    $this->argumentValidator = new Entity([], 'entity_test', $definition, $this->entityManager);
   }
 
   /**
@@ -113,9 +113,9 @@ protected function setUp() {
    * @see \Drupal\views\Plugin\views\argument_validator\Entity::validateArgument()
    */
   public function testValidateArgumentNoAccess() {
-    $options = array();
+    $options = [];
     $options['access'] = FALSE;
-    $options['bundles'] = array();
+    $options['bundles'] = [];
     $this->argumentValidator->init($this->executable, $this->display, $options);
 
     $this->assertFalse($this->argumentValidator->validateArgument(3));
@@ -132,9 +132,9 @@ public function testValidateArgumentNoAccess() {
    * @see \Drupal\views\Plugin\views\argument_validator\Entity::validateArgument()
    */
   public function testValidateArgumentAccess() {
-    $options = array();
+    $options = [];
     $options['access'] = TRUE;
-    $options['bundles'] = array();
+    $options['bundles'] = [];
     $options['operation'] = 'test_op';
     $this->argumentValidator->init($this->executable, $this->display, $options);
 
@@ -143,9 +143,9 @@ public function testValidateArgumentAccess() {
 
     $this->assertTrue($this->argumentValidator->validateArgument(1));
 
-    $options = array();
+    $options = [];
     $options['access'] = TRUE;
-    $options['bundles'] = array();
+    $options['bundles'] = [];
     $options['operation'] = 'test_op_2';
     $this->argumentValidator->init($this->executable, $this->display, $options);
 
@@ -160,9 +160,9 @@ public function testValidateArgumentAccess() {
    * Tests the validate argument method with bundle checking.
    */
   public function testValidateArgumentBundle() {
-    $options = array();
+    $options = [];
     $options['access'] = FALSE;
-    $options['bundles'] = array('test_bundle' => 1);
+    $options['bundles'] = ['test_bundle' => 1];
     $this->argumentValidator->init($this->executable, $this->display, $options);
 
     $this->assertTrue($this->argumentValidator->validateArgument(1));
@@ -208,10 +208,10 @@ public function testCalculateDependencies() {
       ->willReturn($storage);
 
     // Set up the argument validator.
-    $argumentValidator = new Entity(array(), 'entity_test', ['entity_type' => 'entity_test'], $entityManager);
-    $options = array();
+    $argumentValidator = new Entity([], 'entity_test', ['entity_type' => 'entity_test'], $entityManager);
+    $options = [];
     $options['access'] = FALSE;
-    $options['bundles'] = array('test_bundle' => 1);
+    $options['bundles'] = ['test_bundle' => 1];
     $argumentValidator->init($this->executable, $this->display, $options);
 
     $this->assertEquals(['config' => ['test_bundle']], $argumentValidator->calculateDependencies());
@@ -221,9 +221,9 @@ public function testCalculateDependencies() {
    * Tests the validate argument method with multiple argument splitting.
    */
   public function testValidateArgumentMultiple() {
-    $options = array();
+    $options = [];
     $options['access'] = TRUE;
-    $options['bundles'] = array();
+    $options['bundles'] = [];
     $options['operation'] = 'test_op';
     $options['multiple'] = TRUE;
     $this->argumentValidator->init($this->executable, $this->display, $options);
@@ -234,9 +234,9 @@ public function testValidateArgumentMultiple() {
     $this->assertFalse($this->argumentValidator->validateArgument('1,2'));
     $this->assertFalse($this->argumentValidator->validateArgument('1+2'));
 
-    $options = array();
+    $options = [];
     $options['access'] = TRUE;
-    $options['bundles'] = array();
+    $options['bundles'] = [];
     $options['operation'] = 'test_op_3';
     $options['multiple'] = TRUE;
     $this->argumentValidator->init($this->executable, $this->display, $options);
diff --git a/core/modules/views/tests/src/Unit/Plugin/display/PathPluginBaseTest.php b/core/modules/views/tests/src/Unit/Plugin/display/PathPluginBaseTest.php
index b028b9d6b32e870a468a293335fffd2383ddc96b..08ec780dad8b86bc4a496c17ae5d90c398b47b52 100644
--- a/core/modules/views/tests/src/Unit/Plugin/display/PathPluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/display/PathPluginBaseTest.php
@@ -55,7 +55,7 @@ protected function setUp() {
     $this->routeProvider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
     $this->state = $this->getMock('\Drupal\Core\State\StateInterface');
     $this->pathPlugin = $this->getMockBuilder('Drupal\views\Plugin\views\display\PathPluginBase')
-      ->setConstructorArgs(array(array(), 'path_base', array(), $this->routeProvider, $this->state))
+      ->setConstructorArgs([[], 'path_base', [], $this->routeProvider, $this->state])
       ->setMethods(NULL)
       ->getMock();
     $this->setupContainer();
@@ -71,12 +71,12 @@ public function setupContainer() {
     $container = new ContainerBuilder();
     $container->set('plugin.manager.views.access', $this->accessPluginManager);
 
-    $config = array(
-      'views.settings' => array(
+    $config = [
+      'views.settings' => [
         'skip_cache' => TRUE,
-        'display_extenders' => array(),
-      ),
-    );
+        'display_extenders' => [],
+      ],
+    ];
 
     $container->set('config.factory', $this->getConfigFactoryStub($config));
 
@@ -91,17 +91,17 @@ public function setupContainer() {
   public function testCollectRoutes() {
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route',
-    );
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $collection = new RouteCollection();
     $result = $this->pathPlugin->collectRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'view.test_id.page_1'), $result);
+    $this->assertEquals(['test_id.page_1' => 'view.test_id.page_1'], $result);
 
     $route = $collection->get('view.test_id.page_1');
     $this->assertTrue($route instanceof Route);
@@ -119,14 +119,14 @@ public function testCollectRoutes() {
   public function testCollectRoutesWithDisplayReturnResponse() {
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route',
-    );
+    ];
     $this->pathPlugin = $this->getMockBuilder('Drupal\views\Plugin\views\display\PathPluginBase')
-      ->setConstructorArgs(array(array(), 'path_base', array('returns_response' => TRUE), $this->routeProvider, $this->state))
+      ->setConstructorArgs([[], 'path_base', ['returns_response' => TRUE], $this->routeProvider, $this->state])
       ->setMethods(NULL)
       ->getMock();
     $this->pathPlugin->initDisplay($view, $display);
@@ -146,23 +146,23 @@ public function testCollectRoutesWithDisplayReturnResponse() {
   public function testCollectRoutesWithArguments() {
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route/%/example',
-    );
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $collection = new RouteCollection();
     $result = $this->pathPlugin->collectRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'view.test_id.page_1'), $result);
+    $this->assertEquals(['test_id.page_1' => 'view.test_id.page_1'], $result);
 
     $route = $collection->get('view.test_id.page_1');
     $this->assertTrue($route instanceof Route);
     $this->assertEquals('test_id', $route->getDefault('view_id'));
     $this->assertEquals('page_1', $route->getDefault('display_id'));
-    $this->assertEquals(array('arg_0' => 'arg_0'), $route->getOption('_view_argument_map'));
+    $this->assertEquals(['arg_0' => 'arg_0'], $route->getOption('_view_argument_map'));
     $this->assertEquals('my views title', $route->getDefault('_title'));
   }
 
@@ -174,26 +174,26 @@ public function testCollectRoutesWithArguments() {
   public function testCollectRoutesWithArgumentsNotSpecifiedInPath() {
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_with_arguments',
-    );
-    $display['display_options']['arguments'] = array(
-      'test_id' => array(),
-    );
+    ];
+    $display['display_options']['arguments'] = [
+      'test_id' => [],
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $collection = new RouteCollection();
     $result = $this->pathPlugin->collectRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'view.test_id.page_1'), $result);
+    $this->assertEquals(['test_id.page_1' => 'view.test_id.page_1'], $result);
 
     $route = $collection->get('view.test_id.page_1');
     $this->assertTrue($route instanceof Route);
     $this->assertEquals('test_id', $route->getDefault('view_id'));
     $this->assertEquals('page_1', $route->getDefault('display_id'));
-    $this->assertEquals(array('arg_0' => 'arg_0'), $route->getOption('_view_argument_map'));
+    $this->assertEquals(['arg_0' => 'arg_0'], $route->getOption('_view_argument_map'));
     $this->assertEquals('my views title', $route->getDefault('_title'));
   }
 
@@ -203,18 +203,18 @@ public function testCollectRoutesWithArgumentsNotSpecifiedInPath() {
   public function testCollectRoutesWithSpecialRouteName() {
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route',
       'route_name' => 'test_route',
-    );
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $collection = new RouteCollection();
     $result = $this->pathPlugin->collectRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'test_route'), $result);
+    $this->assertEquals(['test_id.page_1' => 'test_route'], $result);
 
     $route = $collection->get('test_route');
     $this->assertTrue($route instanceof Route);
@@ -228,22 +228,22 @@ public function testCollectRoutesWithSpecialRouteName() {
    */
   public function testAlterRoute() {
     $collection = new RouteCollection();
-    $collection->add('test_route', new Route('test_route', array('_controller' => 'Drupal\Tests\Core\Controller\TestController::content')));
-    $route_2 = new Route('test_route/example', array('_controller' => 'Drupal\Tests\Core\Controller\TestController::content'));
+    $collection->add('test_route', new Route('test_route', ['_controller' => 'Drupal\Tests\Core\Controller\TestController::content']));
+    $route_2 = new Route('test_route/example', ['_controller' => 'Drupal\Tests\Core\Controller\TestController::content']);
     $collection->add('test_route_2', $route_2);
 
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route',
-    );
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $view_route_names = $this->pathPlugin->alterRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'test_route'), $view_route_names);
+    $this->assertEquals(['test_id.page_1' => 'test_route'], $view_route_names);
 
     // Ensure that the test_route is overridden.
     $route = $collection->get('test_route');
@@ -342,22 +342,22 @@ public function testGetRestRoute() {
    */
   public function testAlterRouteWithAlterCallback() {
     $collection = new RouteCollection();
-    $collection->add('test_route', new Route('test_route', array('_controller' => 'Drupal\Tests\Core\Controller\TestController::content', '_title_callback' => '\Drupal\Tests\views\Unit\Plugin\display\TestController::testTitle')));
-    $route_2 = new Route('test_route/example', array('_controller' => 'Drupal\Tests\Core\Controller\TestController::content'));
+    $collection->add('test_route', new Route('test_route', ['_controller' => 'Drupal\Tests\Core\Controller\TestController::content', '_title_callback' => '\Drupal\Tests\views\Unit\Plugin\display\TestController::testTitle']));
+    $route_2 = new Route('test_route/example', ['_controller' => 'Drupal\Tests\Core\Controller\TestController::content']);
     $collection->add('test_route_2', $route_2);
 
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route',
-    );
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $view_route_names = $this->pathPlugin->alterRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'test_route'), $view_route_names);
+    $this->assertEquals(['test_id.page_1' => 'test_route'], $view_route_names);
 
     // Ensure that the test_route is overridden.
     $route = $collection->get('test_route');
@@ -384,22 +384,22 @@ public function testCollectRoutesWithNamedParameters() {
     /** @var \Drupal\views\ViewExecutable|\PHPUnit_Framework_MockObject_MockObject $view */
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $view->argument = array();
+    $view->argument = [];
     $view->argument['nid'] = $this->getMockBuilder('Drupal\views\Plugin\views\argument\ArgumentPluginBase')
       ->disableOriginalConstructor()
       ->getMock();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route/%node/example',
-    );
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $collection = new RouteCollection();
     $result = $this->pathPlugin->collectRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'view.test_id.page_1'), $result);
+    $this->assertEquals(['test_id.page_1' => 'view.test_id.page_1'], $result);
 
     $route = $collection->get('view.test_id.page_1');
     $this->assertTrue($route instanceof Route);
@@ -407,7 +407,7 @@ public function testCollectRoutesWithNamedParameters() {
     $this->assertEquals('test_id', $route->getDefault('view_id'));
     $this->assertEquals('page_1', $route->getDefault('display_id'));
     $this->assertEquals('my views title', $route->getDefault('_title'));
-    $this->assertEquals(array('arg_0' => 'node'), $route->getOption('_view_argument_map'));
+    $this->assertEquals(['arg_0' => 'node'], $route->getOption('_view_argument_map'));
   }
 
   /**
@@ -415,7 +415,7 @@ public function testCollectRoutesWithNamedParameters() {
    */
   public function testAlterRoutesWithParameters() {
     $collection = new RouteCollection();
-    $collection->add('test_route', new Route('test_route/{parameter}', array('_controller' => 'Drupal\Tests\Core\Controller\TestController::content')));
+    $collection->add('test_route', new Route('test_route/{parameter}', ['_controller' => 'Drupal\Tests\Core\Controller\TestController::content']));
 
     list($view) = $this->setupViewExecutableAccessPlugin();
 
@@ -425,16 +425,16 @@ public function testAlterRoutesWithParameters() {
       ->getMock();
     $view->argument['test_id'] = $argument;
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route/%',
-    );
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $view_route_names = $this->pathPlugin->alterRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'test_route'), $view_route_names);
+    $this->assertEquals(['test_id.page_1' => 'test_route'], $view_route_names);
 
     // Ensure that the test_route is overridden.
     $route = $collection->get('test_route');
@@ -443,7 +443,7 @@ public function testAlterRoutesWithParameters() {
     $this->assertEquals('page_1', $route->getDefault('display_id'));
     // Ensure that the path did not changed and placeholders are respected.
     $this->assertEquals('/test_route/{parameter}', $route->getPath());
-    $this->assertEquals(array('arg_0' => 'parameter'), $route->getOption('_view_argument_map'));
+    $this->assertEquals(['arg_0' => 'parameter'], $route->getOption('_view_argument_map'));
     $this->assertEquals('my views title', $route->getDefault('_title'));
   }
 
@@ -462,7 +462,7 @@ public function testAlterRoutesWithParametersAndUpcasting() {
       ->getMock();
     $view->argument['test_id'] = $argument;
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
     $display['display_options'] = [
@@ -490,24 +490,24 @@ public function testAlterRoutesWithParametersAndUpcasting() {
    */
   public function testAlterRoutesWithOptionalParameters() {
     $collection = new RouteCollection();
-    $collection->add('test_route', new Route('test_route/{parameter}', array('_controller' => 'Drupal\Tests\Core\Controller\TestController::content')));
+    $collection->add('test_route', new Route('test_route/{parameter}', ['_controller' => 'Drupal\Tests\Core\Controller\TestController::content']));
 
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route/%',
-    );
-    $display['display_options']['arguments'] = array(
-      'test_id' => array(),
-      'test_id2' => array(),
-    );
+    ];
+    $display['display_options']['arguments'] = [
+      'test_id' => [],
+      'test_id2' => [],
+    ];
     $this->pathPlugin->initDisplay($view, $display);
 
     $view_route_names = $this->pathPlugin->alterRoutes($collection);
-    $this->assertEquals(array('test_id.page_1' => 'test_route'), $view_route_names);
+    $this->assertEquals(['test_id.page_1' => 'test_route'], $view_route_names);
 
     // Ensure that the test_route is overridden.
     $route = $collection->get('test_route');
@@ -516,7 +516,7 @@ public function testAlterRoutesWithOptionalParameters() {
     $this->assertEquals('page_1', $route->getDefault('display_id'));
     // Ensure that the path did not changed and placeholders are respected.
     $this->assertEquals('/test_route/{parameter}/{arg_1}', $route->getPath());
-    $this->assertEquals(array('arg_0' => 'parameter'), $route->getOption('_view_argument_map'));
+    $this->assertEquals(['arg_0' => 'parameter'], $route->getOption('_view_argument_map'));
     $this->assertEquals('my views title', $route->getDefault('_title'));
   }
 
@@ -526,12 +526,12 @@ public function testAlterRoutesWithOptionalParameters() {
   public function testGetRouteName() {
     list($view) = $this->setupViewExecutableAccessPlugin();
 
-    $display = array();
+    $display = [];
     $display['display_plugin'] = 'page';
     $display['id'] = 'page_1';
-    $display['display_options'] = array(
+    $display['display_options'] = [
       'path' => 'test_route',
-    );
+    ];
     $this->pathPlugin->initDisplay($view, $display);
     $route_name = $this->pathPlugin->getRouteName();
     // Ensure that the expected routename is returned.
@@ -568,7 +568,7 @@ protected function setupViewExecutableAccessPlugin() {
       ->method('createInstance')
       ->will($this->returnValue($access_plugin));
 
-    return array($view, $view_entity, $access_plugin);
+    return [$view, $view_entity, $access_plugin];
   }
 
 }
diff --git a/core/modules/views/tests/src/Unit/Plugin/field/CounterTest.php b/core/modules/views/tests/src/Unit/Plugin/field/CounterTest.php
index e6afa89aba813f7802115209d9ddc86c8f7e17c8..4d67c00d8a40e0589fc8a3afedb5036ad80b402b 100644
--- a/core/modules/views/tests/src/Unit/Plugin/field/CounterTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/field/CounterTest.php
@@ -41,7 +41,7 @@ class CounterTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $testData = array();
+  protected $testData = [];
 
   /**
    * The handler definition of the counter field.
@@ -57,12 +57,12 @@ protected function setUp() {
     parent::setUp();
 
     // Setup basic stuff like the view and the display.
-    $config = array();
-    $config['display']['default'] = array(
+    $config = [];
+    $config['display']['default'] = [
       'id' => 'default',
       'display_plugin' => 'default',
       'display_title' => 'Default',
-    );
+    ];
 
     $storage = new View($config, 'view');
     $user = $this->getMock('Drupal\Core\Session\AccountInterface');
@@ -70,7 +70,7 @@ protected function setUp() {
       ->disableOriginalConstructor()
       ->getMock();
     $route_provider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
-    $this->view = $this->getMock('Drupal\views\ViewExecutable', NULL, array($storage, $user, $views_data, $route_provider));
+    $this->view = $this->getMock('Drupal\views\ViewExecutable', NULL, [$storage, $user, $views_data, $route_provider]);
 
     $this->display = $this->getMockBuilder('Drupal\views\Plugin\views\display\DisplayPluginBase')
       ->disableOriginalConstructor()
@@ -88,7 +88,7 @@ protected function setUp() {
       $this->testData[] = new ResultRow($set + ['index' => $index]);
     }
 
-    $this->definition = array('title' => 'counter field', 'plugin_type' => 'field');
+    $this->definition = ['title' => 'counter field', 'plugin_type' => 'field'];
   }
 
   /**
@@ -98,11 +98,11 @@ protected function setUp() {
    *   Returns an array of row index to test.
    */
   public function providerRowIndexes() {
-    return array(
-      array(0),
-      array(1),
-      array(2),
-    );
+    return [
+      [0],
+      [1],
+      [2],
+    ];
   }
 
   /**
@@ -111,8 +111,8 @@ public function providerRowIndexes() {
    * @dataProvider providerRowIndexes
    */
   public function testSimpleCounter($i) {
-    $counter_handler = new Counter(array(), 'counter', $this->definition);
-    $options = array();
+    $counter_handler = new Counter([], 'counter', $this->definition);
+    $options = [];
     $counter_handler->init($this->view, $this->display, $options);
 
     $this->view->row_index = $i;
@@ -135,10 +135,10 @@ public function testSimpleCounter($i) {
   public function testCounterRandomStart($i) {
     // Setup a counter field with a random start.
     $rand_start = rand(5, 10);
-    $counter_handler = new Counter(array(), 'counter', $this->definition);
-    $options = array(
+    $counter_handler = new Counter([], 'counter', $this->definition);
+    $options = [
       'counter_start' => $rand_start,
-    );
+    ];
     $counter_handler->init($this->view, $this->display, $options);
 
     $this->view->row_index = $i;
@@ -164,10 +164,10 @@ public function testCounterRandomPagerOffset($i) {
     $this->pager->setOffset($offset);
 
     $rand_start = rand(5, 10);
-    $counter_handler = new Counter(array(), 'counter', $this->definition);
-    $options = array(
+    $counter_handler = new Counter([], 'counter', $this->definition);
+    $options = [
       'counter_start' => $rand_start,
-    );
+    ];
     $counter_handler->init($this->view, $this->display, $options);
 
     $this->view->row_index = $i;
@@ -197,10 +197,10 @@ public function testCounterSecondPage($i) {
     $this->pager->setCurrentPage($current_page);
 
     $rand_start = rand(5, 10);
-    $counter_handler = new Counter(array(), 'counter', $this->definition);
-    $options = array(
+    $counter_handler = new Counter([], 'counter', $this->definition);
+    $options = [
       'counter_start' => $rand_start,
-    );
+    ];
     $counter_handler->init($this->view, $this->display, $options);
 
     $this->view->row_index = $i;
diff --git a/core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php b/core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php
index f137105ddb4d96abb8ee83db2e474810dfbd9f20..555c8a404b523ea3c7eacac6a7ea3f7d8fa6d551 100644
--- a/core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php
@@ -35,10 +35,10 @@ protected function setUp() {
       ->disableOriginalConstructor()
       ->getMock();
 
-    $options = array(
+    $options = [
       'items_per_page' => 5,
       'offset' => 1,
-    );
+    ];
 
     $this->pager->init($view, $display, $options);
 
@@ -183,20 +183,20 @@ public function testHasMoreRecords($items_per_page, $total_items, $current_page,
    * @see self::testHasMoreRecords
    */
   public function providerTestHasMoreRecords() {
-    return array(
+    return [
       // No items per page, so there can't be more available records.
-      array(0, 0, 0, FALSE),
-      array(0, 10, 0, FALSE),
+      [0, 0, 0, FALSE],
+      [0, 10, 0, FALSE],
       // The amount of total items equals the items per page, so there is no
       // next page available.
-      array(5, 5, 0, FALSE),
+      [5, 5, 0, FALSE],
       // There is one more item, and we are at the first page.
-      array(5, 6, 0, TRUE),
+      [5, 6, 0, TRUE],
       // Now we are on the second page, which has just a single one left.
-      array(5, 6, 1, FALSE),
+      [5, 6, 1, FALSE],
       // Increase the total items, so we have some available on the third page.
-      array(5, 12, 1, TRUE)
-    );
+      [5, 12, 1, TRUE]
+    ];
   }
 
   /**
diff --git a/core/modules/views/tests/src/Unit/Plugin/views/display/BlockTest.php b/core/modules/views/tests/src/Unit/Plugin/views/display/BlockTest.php
index a3e86a1f645d6ef7b0052d32ddfe569aacc1b504..21af7bf3af3fa6d8c4d5443f1c9e738bc7e977f8 100644
--- a/core/modules/views/tests/src/Unit/Plugin/views/display/BlockTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/views/display/BlockTest.php
@@ -39,7 +39,7 @@ protected function setUp() {
 
     $this->executable = $this->getMockBuilder('Drupal\views\ViewExecutable')
       ->disableOriginalConstructor()
-      ->setMethods(array('executeDisplay', 'setDisplay', 'setItemsPerPage'))
+      ->setMethods(['executeDisplay', 'setDisplay', 'setItemsPerPage'])
       ->getMock();
     $this->executable->expects($this->any())
       ->method('setDisplay')
@@ -67,7 +67,7 @@ public function testBuildNoOverride() {
 
     $this->blockPlugin->expects($this->once())
       ->method('getConfiguration')
-      ->will($this->returnValue(array('items_per_page' => 'none')));
+      ->will($this->returnValue(['items_per_page' => 'none']));
 
     $this->blockDisplay->preBlockBuild($this->blockPlugin);
   }
@@ -82,7 +82,7 @@ public function testBuildOverride() {
 
     $this->blockPlugin->expects($this->once())
       ->method('getConfiguration')
-      ->will($this->returnValue(array('items_per_page' => 5)));
+      ->will($this->returnValue(['items_per_page' => 5]));
 
     $this->blockDisplay->preBlockBuild($this->blockPlugin);
   }
diff --git a/core/modules/views/tests/src/Unit/Plugin/views/field/EntityOperationsUnitTest.php b/core/modules/views/tests/src/Unit/Plugin/views/field/EntityOperationsUnitTest.php
index 5457baa6362e35fa541e93617c853b55440dd5b3..0900df69247b4eea5679c4ac470e9955c8b0ca09 100644
--- a/core/modules/views/tests/src/Unit/Plugin/views/field/EntityOperationsUnitTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/views/field/EntityOperationsUnitTest.php
@@ -42,11 +42,11 @@ protected function setUp() {
     $this->entityManager = $this->getMock('\Drupal\Core\Entity\EntityManagerInterface');
     $this->languageManager = $this->getMock('\Drupal\Core\Language\LanguageManagerInterface');
 
-    $configuration = array();
+    $configuration = [];
     $plugin_id = $this->randomMachineName();
-    $plugin_definition = array(
+    $plugin_definition = [
       'title' => $this->randomMachineName(),
-    );
+    ];
     $this->plugin = new EntityOperations($configuration, $plugin_id, $plugin_definition, $this->entityManager, $this->languageManager);
 
     $redirect_service = $this->getMock('Drupal\Core\Routing\RedirectDestinationInterface');
@@ -93,11 +93,11 @@ public function testRenderWithDestination() {
       ->method('getEntityTypeId')
       ->will($this->returnValue($entity_type_id));
 
-    $operations = array(
-      'foo' => array(
+    $operations = [
+      'foo' => [
         'title' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     $list_builder = $this->getMock('\Drupal\Core\Entity\EntityListBuilderInterface');
     $list_builder->expects($this->once())
       ->method('getOperations')
@@ -114,10 +114,10 @@ public function testRenderWithDestination() {
     $result = new ResultRow();
     $result->_entity = $entity;
 
-    $expected_build = array(
+    $expected_build = [
       '#type' => 'operations',
       '#links' => $operations
-    );
+    ];
     $expected_build['#links']['foo']['query'] = ['destination' => 'foobar'];
     $build = $this->plugin->render($result);
     $this->assertSame($expected_build, $build);
@@ -135,11 +135,11 @@ public function testRenderWithoutDestination() {
       ->method('getEntityTypeId')
       ->will($this->returnValue($entity_type_id));
 
-    $operations = array(
-      'foo' => array(
+    $operations = [
+      'foo' => [
         'title' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     $list_builder = $this->getMock('\Drupal\Core\Entity\EntityListBuilderInterface');
     $list_builder->expects($this->once())
       ->method('getOperations')
@@ -156,10 +156,10 @@ public function testRenderWithoutDestination() {
     $result = new ResultRow();
     $result->_entity = $entity;
 
-    $expected_build = array(
+    $expected_build = [
       '#type' => 'operations',
       '#links' => $operations
-    );
+    ];
     $build = $this->plugin->render($result);
     $this->assertSame($expected_build, $build);
   }
diff --git a/core/modules/views/tests/src/Unit/PluginBaseTest.php b/core/modules/views/tests/src/Unit/PluginBaseTest.php
index ef19e1168c9638444b8d8175bd14342b26f50621..718cf44e37edce1fe8b4887981354faeed514d74 100644
--- a/core/modules/views/tests/src/Unit/PluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/PluginBaseTest.php
@@ -24,7 +24,7 @@ class PluginBaseTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
 
-    $this->testHelperPlugin = new TestHelperPlugin(array(), 'default', array());
+    $this->testHelperPlugin = new TestHelperPlugin([], 'default', []);
   }
 
   /**
@@ -73,148 +73,148 @@ public function testSetOptionDefault($storage, $definition, $expected) {
    * @return array
    */
   public function providerTestUnpackOptions() {
-    $test_parameters = array();
+    $test_parameters = [];
     // Set a storage but no value, so the storage value should be kept.
-    $test_parameters[] = array(
-      'storage' => array(
+    $test_parameters[] = [
+      'storage' => [
         'key' => 'value',
-      ),
-      'options' => array(
-      ),
-      'definition' => array(
-        'key' => array('default' => 'value2'),
-      ),
-      'expected' => array(
+      ],
+      'options' => [
+      ],
+      'definition' => [
+        'key' => ['default' => 'value2'],
+      ],
+      'expected' => [
         'key' => 'value',
-      ),
-    );
+      ],
+    ];
     // Set a storage and a option value, so the option value should be kept.
-    $test_parameters[] = array(
-      'storage' => array(
+    $test_parameters[] = [
+      'storage' => [
         'key' => 'value',
-      ),
-      'options' => array(
+      ],
+      'options' => [
         'key' => 'value2',
-      ),
-      'definition' => array(
-        'key' => array('default' => 'value3'),
-      ),
-      'expected' => array(
+      ],
+      'definition' => [
+        'key' => ['default' => 'value3'],
+      ],
+      'expected' => [
         'key' => 'value2',
-      ),
+      ],
       ''
-    );
+    ];
     // Set no storage but an options value, so the options value should be kept.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'options' => array(
+    $test_parameters[] = [
+      'storage' => [],
+      'options' => [
         'key' => 'value',
-      ),
-      'definition' => array(
-        'key' => array('default' => 'value2'),
-      ),
-      'expected' => array(
+      ],
+      'definition' => [
+        'key' => ['default' => 'value2'],
+      ],
+      'expected' => [
         'key' => 'value',
-      ),
-    );
+      ],
+    ];
     // Set additional options, which aren't part of the definition, so they
     // should be ignored if all is set.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'options' => array(
+    $test_parameters[] = [
+      'storage' => [],
+      'options' => [
         'key' => 'value',
         'key2' => 'value2',
-      ),
-      'definition' => array(
-        'key' => array('default' => 'value2'),
-      ),
-      'expected' => array(
+      ],
+      'definition' => [
+        'key' => ['default' => 'value2'],
+      ],
+      'expected' => [
         'key' => 'value',
-      ),
-    );
-    $test_parameters[] = array(
-      'storage' => array(),
-      'options' => array(
+      ],
+    ];
+    $test_parameters[] = [
+      'storage' => [],
+      'options' => [
         'key' => 'value',
         'key2' => 'value2',
-      ),
-      'definition' => array(
-        'key' => array('default' => 'value2'),
-      ),
-      'expected' => array(
+      ],
+      'definition' => [
+        'key' => ['default' => 'value2'],
+      ],
+      'expected' => [
         'key' => 'value',
         'key2' => 'value2',
-      ),
+      ],
       'all' => TRUE,
-    );
+    ];
     // Provide multiple options with their corresponding definition.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'options' => array(
+    $test_parameters[] = [
+      'storage' => [],
+      'options' => [
         'key' => 'value',
         'key2' => 'value2',
-      ),
-      'definition' => array(
-        'key' => array('default' => 'value2'),
-        'key2' => array('default' => 'value3'),
-      ),
-      'expected' => array(
+      ],
+      'definition' => [
+        'key' => ['default' => 'value2'],
+        'key2' => ['default' => 'value3'],
+      ],
+      'expected' => [
         'key' => 'value',
         'key2' => 'value2',
-      ),
-    );
+      ],
+    ];
     // Set a complex definition structure with a zero and a one level structure.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'options' => array(
+    $test_parameters[] = [
+      'storage' => [],
+      'options' => [
         'key0' => 'value',
-        'key1' => array('key1:1' => 'value1', 'key1:2' => 'value2'),
-      ),
-      'definition' => array(
-        'key0' => array('default' => 'value0'),
-        'key1' => array('contains' => array(
-          'key1:1' => array('default' => 'value1:1'),
-        )),
-      ),
-      'expected' => array(
+        'key1' => ['key1:1' => 'value1', 'key1:2' => 'value2'],
+      ],
+      'definition' => [
+        'key0' => ['default' => 'value0'],
+        'key1' => ['contains' => [
+          'key1:1' => ['default' => 'value1:1'],
+        ]],
+      ],
+      'expected' => [
         'key0' => 'value',
-        'key1' => array('key1:1' => 'value1'),
-      ),
-    );
+        'key1' => ['key1:1' => 'value1'],
+      ],
+    ];
     // Setup a two level structure.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'options' => array(
-        'key2' => array(
-          'key2:1' => array(
+    $test_parameters[] = [
+      'storage' => [],
+      'options' => [
+        'key2' => [
+          'key2:1' => [
             'key2:1:1' => 'value0',
-            'key2:1:2' => array(
+            'key2:1:2' => [
               'key2:1:2:1' => 'value1',
-            ),
-          ),
-        ),
-      ),
-      'definition' => array(
-        'key2' => array('contains' => array(
-          'key2:1' => array('contains' => array(
-            'key2:1:1' => array('default' => 'value2:1:2:1'),
-            'key2:1:2' => array('contains' => array(
-              'key2:1:2:1' => array('default' => 'value2:1:2:1'),
-            )),
-          )),
-        )),
-      ),
-      'expected' => array(
-        'key2' => array(
-          'key2:1' => array(
+            ],
+          ],
+        ],
+      ],
+      'definition' => [
+        'key2' => ['contains' => [
+          'key2:1' => ['contains' => [
+            'key2:1:1' => ['default' => 'value2:1:2:1'],
+            'key2:1:2' => ['contains' => [
+              'key2:1:2:1' => ['default' => 'value2:1:2:1'],
+            ]],
+          ]],
+        ]],
+      ],
+      'expected' => [
+        'key2' => [
+          'key2:1' => [
             'key2:1:1' => 'value0',
-            'key2:1:2' => array(
+            'key2:1:2' => [
               'key2:1:2:1' => 'value1',
-            ),
-          ),
-        ),
-      ),
-    );
+            ],
+          ],
+        ],
+      ],
+    ];
 
     return $test_parameters;
   }
@@ -225,55 +225,55 @@ public function providerTestUnpackOptions() {
    * @return array
    */
   public function providerTestSetOptionDefault() {
-    $test_parameters = array();
+    $test_parameters = [];
     // No definition should change anything on the storage.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'definition' => array(),
-      'expected' => array(),
-    );
+    $test_parameters[] = [
+      'storage' => [],
+      'definition' => [],
+      'expected' => [],
+    ];
     // Set a single definition, which should be picked up.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'definition' => array(
-        'key' => array('default' => 'value'),
-      ),
-      'expected' => array(
+    $test_parameters[] = [
+      'storage' => [],
+      'definition' => [
+        'key' => ['default' => 'value'],
+      ],
+      'expected' => [
         'key' => 'value',
-      ),
-    );
+      ],
+    ];
     // Set multiple keys, all should be picked up.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'definition' => array(
-        'key' => array('default' => 'value'),
-        'key2' => array('default' => 'value2'),
-        'key3' => array('default' => 'value3'),
-      ),
-      'expected' => array(
+    $test_parameters[] = [
+      'storage' => [],
+      'definition' => [
+        'key' => ['default' => 'value'],
+        'key2' => ['default' => 'value2'],
+        'key3' => ['default' => 'value3'],
+      ],
+      'expected' => [
         'key' => 'value',
         'key2' => 'value2',
         'key3' => 'value3',
-      ),
-    );
+      ],
+    ];
     // Setup a definition with multiple levels.
-    $test_parameters[] = array(
-      'storage' => array(),
-      'definition' => array(
-        'key' => array('default' => 'value'),
-        'key2' => array('contains' => array(
-          'key2:1' => array('default' => 'value2:1'),
-          'key2:2' => array('default' => 'value2:2'),
-        )),
-      ),
-      'expected' => array(
+    $test_parameters[] = [
+      'storage' => [],
+      'definition' => [
+        'key' => ['default' => 'value'],
+        'key2' => ['contains' => [
+          'key2:1' => ['default' => 'value2:1'],
+          'key2:2' => ['default' => 'value2:2'],
+        ]],
+      ],
+      'expected' => [
         'key' => 'value',
-        'key2' => array(
+        'key2' => [
           'key2:1' => 'value2:1',
           'key2:2' => 'value2:2',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     return $test_parameters;
   }
diff --git a/core/modules/views/tests/src/Unit/PluginTypeListTest.php b/core/modules/views/tests/src/Unit/PluginTypeListTest.php
index 32b46d51aa7bf5fe2ff03c5d2bde0e3dab67a291..29da6b3aff4d39d0bc049c0a09e6eca7d814c416 100644
--- a/core/modules/views/tests/src/Unit/PluginTypeListTest.php
+++ b/core/modules/views/tests/src/Unit/PluginTypeListTest.php
@@ -16,7 +16,7 @@ class PluginTypeListTest extends UnitTestCase {
    * Tests the plugins list is correct.
    */
   public function testPluginList() {
-    $plugin_list = array(
+    $plugin_list = [
       'access',
       'area',
       'argument',
@@ -36,7 +36,7 @@ public function testPluginList() {
       'sort',
       'style',
       'wizard',
-    );
+    ];
 
     $diff = array_diff($plugin_list, ViewExecutable::getPluginTypes());
     $this->assertTrue(empty($diff), 'The plugin list is correct');
diff --git a/core/modules/views/tests/src/Unit/Routing/ViewPageControllerTest.php b/core/modules/views/tests/src/Unit/Routing/ViewPageControllerTest.php
index 971c1c499ff07c0ad5fc628970c6301e65889997..9242545b7ad3fbbd9168b234814c7a95dfed8477 100644
--- a/core/modules/views/tests/src/Unit/Routing/ViewPageControllerTest.php
+++ b/core/modules/views/tests/src/Unit/Routing/ViewPageControllerTest.php
@@ -148,7 +148,7 @@ public function testHandleWithArgumentsOnOverriddenRouteWithUpcasting() {
     $request->attributes->set('display_id', 'page_1');
     // Add the argument to the request.
     $request->attributes->set('test_entity', $this->getMock('Drupal\Core\Entity\EntityInterface'));
-    $raw_variables = new ParameterBag(array('test_entity' => 'example_id'));
+    $raw_variables = new ParameterBag(['test_entity' => 'example_id']);
     $request->attributes->set('_raw_variables', $raw_variables);
     $options = [
       '_view_argument_map' => [
diff --git a/core/modules/views/tests/src/Unit/ViewExecutableTest.php b/core/modules/views/tests/src/Unit/ViewExecutableTest.php
index fe64ec27880a1a0cf0e7951c3e5a1b7720e75245..6abcd99279dc06a5e078549e60853b836d34c3ab 100644
--- a/core/modules/views/tests/src/Unit/ViewExecutableTest.php
+++ b/core/modules/views/tests/src/Unit/ViewExecutableTest.php
@@ -476,7 +476,7 @@ public function testAttachDisplays() {
    *   Returns the view executable and default display.
    */
   protected function setupBaseViewAndDisplay() {
-    $config = array(
+    $config = [
       'id' => 'test_view',
       'tag' => 'OnE, TWO, and three',
       'display' => [
@@ -486,7 +486,7 @@ protected function setupBaseViewAndDisplay() {
           'display_title' => 'Default',
         ],
       ],
-    );
+    ];
 
     $storage = new View($config, 'view');
     $view = new ViewExecutable($storage, $this->user, $this->viewsData, $this->routeProvider);
@@ -516,7 +516,7 @@ protected function setupBaseViewAndDisplay() {
       $view->$type = [];
     }
 
-    return array($view, $display);
+    return [$view, $display];
   }
 
   /**
diff --git a/core/modules/views/tests/src/Unit/ViewsDataHelperTest.php b/core/modules/views/tests/src/Unit/ViewsDataHelperTest.php
index 97153f5cea041d723d88bd7e3625b2fe38d0dd0b..2289f236e6ce7f998484efacd8bfcc6222bfb813 100644
--- a/core/modules/views/tests/src/Unit/ViewsDataHelperTest.php
+++ b/core/modules/views/tests/src/Unit/ViewsDataHelperTest.php
@@ -30,7 +30,7 @@ protected function viewsData() {
     $data['views_test_data']['age']['area']['id'] = 'text';
     $data['views_test_data']['age']['area']['sub_type'] = 'header';
     $data['views_test_data']['job']['area']['id'] = 'text';
-    $data['views_test_data']['job']['area']['sub_type'] = array('header', 'footer');
+    $data['views_test_data']['job']['area']['sub_type'] = ['header', 'footer'];
 
     return $data;
   }
@@ -48,52 +48,52 @@ public function testFetchFields() {
 
     $data_helper = new ViewsDataHelper($views_data);
 
-    $expected = array(
-      'field' => array(
+    $expected = [
+      'field' => [
         'age',
         'created',
         'job',
         'name',
         'status',
-      ),
-      'argument' => array(
+      ],
+      'argument' => [
         'age',
         'created',
         'id',
         'job',
-      ),
-      'filter' => array(
+      ],
+      'filter' => [
         'created',
         'id',
         'job',
         'name',
         'status',
-      ),
-      'sort' => array(
+      ],
+      'sort' => [
         'age',
         'created',
         'id',
         'name',
         'status',
-      ),
-      'area' => array(
+      ],
+      'area' => [
         'age',
         'created',
         'job',
-      ),
-      'header' => array(
+      ],
+      'header' => [
         'age',
         'created',
         'job',
-      ),
-      'footer' => array(
+      ],
+      'footer' => [
         'age',
         'created',
         'job',
-      ),
-    );
+      ],
+    ];
 
-    $handler_types = array('field', 'argument', 'filter', 'sort', 'area');
+    $handler_types = ['field', 'argument', 'filter', 'sort', 'area'];
     foreach ($handler_types as $handler_type) {
       $fields = $data_helper->fetchFields('views_test_data', $handler_type);
       $expected_keys = $expected[$handler_type];
@@ -104,7 +104,7 @@ public function testFetchFields() {
     }
 
     // Check for subtype filtering, so header and footer.
-    foreach (array('header', 'footer') as $sub_type) {
+    foreach (['header', 'footer'] as $sub_type) {
       $fields = $data_helper->fetchFields('views_test_data', 'area', FALSE, $sub_type);
 
       $expected_keys = $expected[$sub_type];
diff --git a/core/modules/views/tests/src/Unit/ViewsDataTest.php b/core/modules/views/tests/src/Unit/ViewsDataTest.php
index 235189213c2af2791ce32de9f34f1d0962a50d9e..a145538a6f8c28605bde5270f42fac8f13eb7ca9 100644
--- a/core/modules/views/tests/src/Unit/ViewsDataTest.php
+++ b/core/modules/views/tests/src/Unit/ViewsDataTest.php
@@ -63,14 +63,14 @@ protected function setUp() {
     $this->cacheBackend = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
     $this->getContainerWithCacheTagsInvalidator($this->cacheTagsInvalidator);
 
-    $configs = array();
+    $configs = [];
     $configs['views.settings']['skip_cache'] = FALSE;
     $this->configFactory = $this->getConfigFactoryStub($configs);
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $this->languageManager = $this->getMock('Drupal\Core\Language\LanguageManagerInterface');
     $this->languageManager->expects($this->any())
       ->method('getCurrentLanguage')
-      ->will($this->returnValue(new Language(array('id' => 'en'))));
+      ->will($this->returnValue(new Language(['id' => 'en'])));
 
     $this->viewsData = new ViewsData($this->cacheBackend, $this->configFactory, $this->moduleHandler, $this->languageManager);
   }
@@ -90,7 +90,7 @@ protected function viewsData() {
     $data['views_test_data']['age']['area']['id'] = 'text';
     $data['views_test_data']['age']['area']['sub_type'] = 'header';
     $data['views_test_data']['job']['area']['id'] = 'text';
-    $data['views_test_data']['job']['area']['sub_type'] = array('header', 'footer');
+    $data['views_test_data']['job']['area']['sub_type'] = ['header', 'footer'];
 
     // Duplicate the example views test data for different weight, different title,
     // and matching data.
@@ -136,7 +136,7 @@ protected function setupMockedModuleHandler() {
     $this->moduleHandler->expects($this->at(0))
       ->method('getImplementations')
       ->with('views_data')
-      ->willReturn(array('views_test_data'));
+      ->willReturn(['views_test_data']);
     $this->moduleHandler->expects($this->at(1))
       ->method('invoke')
       ->with('views_test_data', 'views_data')
@@ -167,11 +167,11 @@ public function testFetchBaseTables() {
     }
 
     // Test the values returned for each base table.
-    $defaults = array(
+    $defaults = [
       'title' => '',
       'help' => '',
       'weight' => 0,
-    );
+    ];
     foreach ($base_tables as $base_table => $info) {
       // Merge in default values as in fetchBaseTables().
       $expected = $data[$base_table]['table']['base'] += $defaults;
@@ -215,7 +215,7 @@ public function testFullAndTableGetCache() {
     $this->moduleHandler->expects($this->at(0))
       ->method('getImplementations')
       ->with('views_data')
-      ->willReturn(array('views_test_data'));
+      ->willReturn(['views_test_data']);
     $this->moduleHandler->expects($this->at(1))
       ->method('invoke')
       ->with('views_test_data', 'views_data')
@@ -227,7 +227,7 @@ public function testFullAndTableGetCache() {
     $this->moduleHandler->expects($this->at(3))
       ->method('getImplementations')
       ->with('views_data')
-      ->willReturn(array('views_test_data'));
+      ->willReturn(['views_test_data']);
     $this->moduleHandler->expects($this->at(4))
       ->method('invoke')
       ->with('views_test_data', 'views_data')
@@ -252,7 +252,7 @@ public function testFullAndTableGetCache() {
       ->will($this->returnValue(FALSE));
     $this->cacheBackend->expects($this->at(3))
       ->method('set')
-      ->with("views_data:$random_table_name:en", array());
+      ->with("views_data:$random_table_name:en", []);
     $this->cacheTagsInvalidator->expects($this->once())
       ->method('invalidateTags')
       ->with(['views_data']);
@@ -269,7 +269,7 @@ public function testFullAndTableGetCache() {
       ->will($this->returnValue(FALSE));
     $this->cacheBackend->expects($this->at(7))
       ->method('set')
-      ->with("views_data:$random_table_name:en", array());
+      ->with("views_data:$random_table_name:en", []);
 
     $views_data = $this->viewsData->getAll();
     $this->assertSame($expected_views_data, $views_data);
@@ -283,7 +283,7 @@ public function testFullAndTableGetCache() {
     $this->assertSame($expected_views_data[$table_name_2], $views_data);
 
     $views_data = $this->viewsData->get($random_table_name);
-    $this->assertSame(array(), $views_data);
+    $this->assertSame([], $views_data);
 
     $this->viewsData->clear();
 
@@ -379,11 +379,11 @@ public function testNonExistingTableGetCache() {
 
     // All views data should be requested on the first try.
     $views_data = $this->viewsData->get($random_table_name);
-    $this->assertSame(array(), $views_data, 'Make sure fetching views data for an invalid table returns an empty array.');
+    $this->assertSame([], $views_data, 'Make sure fetching views data for an invalid table returns an empty array.');
 
     // Test no data is rebuilt when requesting an invalid table again.
     $views_data = $this->viewsData->get($random_table_name);
-    $this->assertSame(array(), $views_data, 'Make sure fetching views data for an invalid table returns an empty array.');
+    $this->assertSame([], $views_data, 'Make sure fetching views data for an invalid table returns an empty array.');
   }
 
   /**
@@ -433,7 +433,7 @@ public function testCacheCallsWithSameTableMultipleTimesAndWarmCache() {
     $this->cacheBackend->expects($this->once())
       ->method('get')
       ->with('views_data:views_test_data:en')
-      ->will($this->returnValue((object) array('data' => $expected_views_data['views_test_data'])));
+      ->will($this->returnValue((object) ['data' => $expected_views_data['views_test_data']]));
     $this->cacheBackend->expects($this->never())
       ->method('set');
 
@@ -466,7 +466,7 @@ public function testCacheCallsWithWarmCacheAndDifferentTable() {
     $this->cacheBackend->expects($this->at(1))
       ->method('get')
       ->with('views_data:en')
-      ->will($this->returnValue((object) array('data' => $expected_views_data)));
+      ->will($this->returnValue((object) ['data' => $expected_views_data]));
     $this->cacheBackend->expects($this->at(2))
       ->method('set')
       ->with('views_data:views_test_data_2:en', $expected_views_data['views_test_data_2']);
@@ -502,10 +502,10 @@ public function testCacheCallsWithWarmCacheAndInvalidTable() {
     $this->cacheBackend->expects($this->at(1))
       ->method('get')
       ->with('views_data:en')
-      ->will($this->returnValue((object) array('data' => $expected_views_data)));
+      ->will($this->returnValue((object) ['data' => $expected_views_data]));
     $this->cacheBackend->expects($this->at(2))
       ->method('set')
-      ->with("views_data:$non_existing_table:en", array());
+      ->with("views_data:$non_existing_table:en", []);
 
     // Initialize the views data cache and request a non-existing table. This
     // will result in the same cache requests as we explicitly write an empty
@@ -514,7 +514,7 @@ public function testCacheCallsWithWarmCacheAndInvalidTable() {
     // check if the table does exist or not.
     for ($i = 0; $i < 5; $i++) {
       $views_data = $this->viewsData->get($non_existing_table);
-      $this->assertSame(array(), $views_data);
+      $this->assertSame([], $views_data);
     }
   }
 
@@ -535,7 +535,7 @@ public function testCacheCallsWithWarmCacheForInvalidTable() {
     $this->cacheBackend->expects($this->once())
       ->method('get')
       ->with("views_data:$non_existing_table:en")
-      ->will($this->returnValue((object) array('data' => array())));
+      ->will($this->returnValue((object) ['data' => []]));
     $this->cacheBackend->expects($this->never())
       ->method('set');
 
@@ -546,7 +546,7 @@ public function testCacheCallsWithWarmCacheForInvalidTable() {
     // check if the table does exist or not.
     for ($i = 0; $i < 5; $i++) {
       $views_data = $this->viewsData->get($non_existing_table);
-      $this->assertSame(array(), $views_data);
+      $this->assertSame([], $views_data);
     }
   }
 
@@ -588,7 +588,7 @@ public function testCacheCallsWithWarmCacheAndGetAllTables() {
     $this->cacheBackend->expects($this->once())
       ->method('get')
       ->with("views_data:en")
-      ->will($this->returnValue((object) array('data' => $expected_views_data)));
+      ->will($this->returnValue((object) ['data' => $expected_views_data]));
     $this->cacheBackend->expects($this->never())
       ->method('set');
 
@@ -618,7 +618,7 @@ public function testCacheCallsWithoutWarmCacheAndGetMultipleTables() {
     $this->cacheBackend->expects($this->at(1))
       ->method('get')
       ->with('views_data:en')
-      ->will($this->returnValue((object) array('data' => $expected_views_data)));
+      ->will($this->returnValue((object) ['data' => $expected_views_data]));
     $this->cacheBackend->expects($this->at(2))
       ->method('set')
       ->with("views_data:$table_name:en", $expected_views_data[$table_name]);
diff --git a/core/modules/views/tests/src/Unit/ViewsHandlerManagerTest.php b/core/modules/views/tests/src/Unit/ViewsHandlerManagerTest.php
index efbbe49e6f6a1bea4346aa3efb3948ec71f19980..c181b943567fc24fd6eb3453b44fb90605e28228 100644
--- a/core/modules/views/tests/src/Unit/ViewsHandlerManagerTest.php
+++ b/core/modules/views/tests/src/Unit/ViewsHandlerManagerTest.php
@@ -48,7 +48,7 @@ protected function setUp() {
       ->getMock();
     $cache_backend = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
-    $this->handlerManager = new ViewsHandlerManager('test', new \ArrayObject(array()), $this->viewsData, $cache_backend, $this->moduleHandler);
+    $this->handlerManager = new ViewsHandlerManager('test', new \ArrayObject([]), $this->viewsData, $cache_backend, $this->moduleHandler);
   }
 
   /**
@@ -72,7 +72,7 @@ protected function setupMockedFactory() {
   public function testAlterHookInvocation() {
     $this->moduleHandler->expects($this->once())
       ->method('alter')
-      ->with('views_plugins_test', array());
+      ->with('views_plugins_test', []);
 
     $this->handlerManager->getDefinitions();
   }
diff --git a/core/modules/views/views.api.php b/core/modules/views/views.api.php
index 345ecc959e7466db38286b50b1b67e8c3f9156bd..c21b9c54e8bf0afc02f349b9da2889e3fd808c33 100644
--- a/core/modules/views/views.api.php
+++ b/core/modules/views/views.api.php
@@ -93,7 +93,7 @@
  *   to the user following analysis of the view.
  */
 function hook_views_analyze(Drupal\views\ViewExecutable $view) {
-  $messages = array();
+  $messages = [];
 
   if ($view->display_handler->options['pager']['type'] == 'none') {
     $messages[] = Drupal\views\Analyzer::formatMessage(t('This view has no pager. This could cause performance issues when the view contains many items.'), 'warning');
@@ -144,15 +144,15 @@ function hook_views_data() {
   // );
 
   // Define the return array.
-  $data = array();
+  $data = [];
 
   // The outermost keys of $data are Views table names, which should usually
   // be the same as the hook_schema() table names.
-  $data['example_table'] = array();
+  $data['example_table'] = [];
 
   // The value corresponding to key 'table' gives properties of the table
   // itself.
-  $data['example_table']['table'] = array();
+  $data['example_table']['table'] = [];
 
   // Within 'table', the value of 'group' (translated string) is used as a
   // prefix in Views UI for this table's fields, filters, etc. When adding
@@ -169,7 +169,7 @@ function hook_views_data() {
   // for views. Non-base tables can only be brought in via relationships in
   // views based on other tables. To define a table to be a base table, add
   // key 'base' to the 'table' array:
-  $data['example_table']['table']['base'] = array(
+  $data['example_table']['table']['base'] = [
     // Identifier (primary) field in this table for Views.
     'field' => 'nid',
     // Label in the UI.
@@ -177,7 +177,7 @@ function hook_views_data() {
     // Longer description in the UI. Required.
     'help' => t('Example table contains example content and can be related to nodes.'),
     'weight' => -10,
-  );
+  ];
 
   // Some tables have an implicit, automatic relationship to other tables,
   // meaning that when the other table is available in a view (either as the
@@ -196,7 +196,7 @@ function hook_views_data() {
   //   ... FROM example_table et ... JOIN node_field_data nfd
   //   ON et.nid = nfd.nid AND ('extra' clauses will be here) ...
   // although the table aliases will be different.
-  $data['example_table']['table']['join'] = array(
+  $data['example_table']['table']['join'] = [
     // Within the 'join' section, list one or more tables to automatically
     // join to. In this example, every time 'node_field_data' is available in
     // a view, 'example_table' will be too. The array keys here are the array
@@ -204,36 +204,36 @@ function hook_views_data() {
     // implementations. If the table listed here is from another module's
     // hook_views_data() implementation, make sure your module depends on that
     // other module.
-    'node_field_data' => array(
+    'node_field_data' => [
       // Primary key field in node_field_data to use in the join.
       'left_field' => 'nid',
       // Foreign key field in example_table to use in the join.
       'field' => 'nid',
       // 'extra' is an array of additional conditions on the join.
-      'extra' => array(
-        0 => array(
+      'extra' => [
+        0 => [
           // Adds AND node_field_data.published = TRUE to the join.
           'field' => 'published',
           'value' => TRUE,
-        ),
-        1 => array(
+        ],
+        1 => [
           // Adds AND example_table.numeric_field = 1 to the join.
           'left_field' => 'numeric_field',
           'value' => 1,
           // If true, the value will not be surrounded in quotes.
           'numeric' => TRUE,
-        ),
-        2 => array(
+        ],
+        2 => [
           // Adds AND example_table.boolean_field <>
           // node_field_data.published to the join.
           'field' => 'published',
           'left_field' => 'boolean_field',
           // The operator used, Defaults to "=".
           'operator' => '!=',
-        ),
-      ),
-    ),
-  );
+        ],
+      ],
+    ],
+  ];
 
   // You can also do a more complex join, where in order to get to a certain
   // base table defined in a hook_views_data() implementation, you will join
@@ -248,7 +248,7 @@ function hook_views_data() {
   //   JOIN node_field_data nfd ON (definition of the join from the foo
   //   module goes here) ...
   // although the table aliases will be different.
-  $data['example_table']['table']['join']['node_field_data'] = array(
+  $data['example_table']['table']['join']['node_field_data'] = [
     // 'node_field_data' above is the base we're joining to in Views.
     // 'left_table' is the table we're actually joining to, in order to get to
     // 'node_field_data'. It has to be something that Views knows how to join
@@ -257,16 +257,16 @@ function hook_views_data() {
     'left_field' => 'nid',
     'field' => 'nid',
     // 'extra' is an array of additional conditions on the join.
-    'extra' => array(
+    'extra' => [
       // This syntax matches additional fields in the two tables:
       // ... AND foo.langcode = example_table.langcode ...
-      array('left_field' => 'langcode', 'field' => 'langcode'),
+      ['left_field' => 'langcode', 'field' => 'langcode'],
       // This syntax adds a condition on our table. 'operator' defaults to
       // '=' for non-array values, or 'IN' for array values.
       // ... AND example_table.numeric_field > 0 ...
-      array('field' => 'numeric_field', 'value' => 0, 'numeric' => TRUE, 'operator' => '>'),
-    ),
-  );
+      ['field' => 'numeric_field', 'value' => 0, 'numeric' => TRUE, 'operator' => '>'],
+    ],
+  ];
 
   // Other array elements at the top level of your table's array describe
   // individual database table fields made available to Views. The array keys
@@ -296,7 +296,7 @@ function hook_views_data() {
 
   // Node ID field, exposed as relationship only, since it is a foreign key
   // in this table.
-  $data['example_table']['nid'] = array(
+  $data['example_table']['nid'] = [
     'title' => t('Example content'),
     'help' => t('Relate example content to the node content'),
 
@@ -306,7 +306,7 @@ function hook_views_data() {
     // - Use hook_views_data_alter() -- see the function body example on that
     //   hook for details.
     // - Use the implicit join method described above.
-    'relationship' => array(
+    'relationship' => [
       // Views name of the table to join to for the relationship.
       'base' => 'node_field_data',
       // Database field name in the other table to join on.
@@ -315,78 +315,78 @@ function hook_views_data() {
       'id' => 'standard',
       // Default label for relationship in the UI.
       'label' => t('Example node'),
-    ),
-  );
+    ],
+  ];
 
   // Plain text field, exposed as a field, sort, filter, and argument.
-  $data['example_table']['plain_text_field'] = array(
+  $data['example_table']['plain_text_field'] = [
     'title' => t('Plain text field'),
     'help' => t('Just a plain text field.'),
 
-    'field' => array(
+    'field' => [
       // ID of field handler plugin to use.
       'id' => 'standard',
-    ),
+    ],
 
-    'sort' => array(
+    'sort' => [
       // ID of sort handler plugin to use.
       'id' => 'standard',
-    ),
+    ],
 
-    'filter' => array(
+    'filter' => [
       // ID of filter handler plugin to use.
       'id' => 'string',
-    ),
+    ],
 
-    'argument' => array(
+    'argument' => [
       // ID of argument handler plugin to use.
       'id' => 'string',
-    ),
-  );
+    ],
+  ];
 
   // Numeric field, exposed as a field, sort, filter, and argument.
-  $data['example_table']['numeric_field'] = array(
+  $data['example_table']['numeric_field'] = [
     'title' => t('Numeric field'),
     'help' => t('Just a numeric field.'),
 
-    'field' => array(
+    'field' => [
       // ID of field handler plugin to use.
       'id' => 'numeric',
-    ),
+    ],
 
-    'sort' => array(
+    'sort' => [
       // ID of sort handler plugin to use.
       'id' => 'standard',
-    ),
+    ],
 
-    'filter' => array(
+    'filter' => [
       // ID of filter handler plugin to use.
       'id' => 'numeric',
-    ),
+    ],
 
-    'argument' => array(
+    'argument' => [
       // ID of argument handler plugin to use.
       'id' => 'numeric',
-    ),
-  );
+    ],
+  ];
 
   // Boolean field, exposed as a field, sort, and filter. The filter section
   // illustrates overriding various settings.
-  $data['example_table']['boolean_field'] = array(
+  $data['example_table']['boolean_field'] = [
     'title' => t('Boolean field'),
     'help' => t('Just an on/off field.'),
 
-    'field' => array(
+    'field' => [
       // ID of field handler plugin to use.
       'id' => 'boolean',
-    ),
+    ],
 
-    'sort' => array(
+    'sort' => [
       // ID of sort handler plugin to use.
       'id' => 'standard',
-    ),
+    ],
 
-    'filter' => array(
+    'filter' => [
       // ID of filter handler plugin to use.
       'id' => 'boolean',
       // Override the generic field title, so that the filter uses a different
@@ -398,43 +398,43 @@ function hook_views_data() {
       // Override the default Boolean filter handler's 'use_equal' setting, to
       // make the query use 'boolean_field = 1' instead of 'boolean_field <> 0'.
       'use_equal' => TRUE,
-    ),
-  );
+    ],
+  ];
 
   // Integer timestamp field, exposed as a field, sort, and filter.
-  $data['example_table']['timestamp_field'] = array(
+  $data['example_table']['timestamp_field'] = [
     'title' => t('Timestamp field'),
     'help' => t('Just a timestamp field.'),
 
-    'field' => array(
+    'field' => [
       // ID of field handler plugin to use.
       'id' => 'date',
-    ),
+    ],
 
-    'sort' => array(
+    'sort' => [
       // ID of sort handler plugin to use.
       'id' => 'date',
-    ),
+    ],
 
-    'filter' => array(
+    'filter' => [
       // ID of filter handler plugin to use.
       'id' => 'date',
-    ),
-  );
+    ],
+  ];
 
   // Area example. Areas are not generally associated with actual data
   // tables and fields. This example is from views_views_data(), which defines
   // the "Global" table (not really a table, but a group of Fields, Filters,
   // etc. that are grouped into section "Global" in the UI). Here's the
   // definition of the generic "Text area":
-  $data['views']['area'] = array(
+  $data['views']['area'] = [
     'title' => t('Text area'),
     'help' => t('Provide markup text for the area.'),
-    'area' => array(
+    'area' => [
       // ID of the area handler plugin to use.
       'id' => 'text',
-    ),
-  );
+    ],
+  ];
 
   return $data;
 }
@@ -453,15 +453,15 @@ function hook_views_data_alter(array &$data) {
   $data['node_field_data']['nid']['title'] = t('Node-Nid');
 
   // Add an additional field to the users_field_data table.
-  $data['users_field_data']['example_field'] = array(
+  $data['users_field_data']['example_field'] = [
     'title' => t('Example field'),
     'help' => t('Some example content that references a user'),
 
-    'field' => array(
+    'field' => [
       // ID of the field handler to use.
       'id' => 'example_field',
-    ),
-  );
+    ],
+  ];
 
   // Change the handler of the node title field, presumably to a handler plugin
   // you define in your module. Give the ID of this plugin.
@@ -479,11 +479,11 @@ function hook_views_data_alter(array &$data) {
   // rather than adding this relationship directly to the $data['foo']['fid']
   // field entry, which could overwrite an existing relationship, we define
   // a dummy field key to handle the relationship.
-  $data['foo']['unique_dummy_name'] = array(
+  $data['foo']['unique_dummy_name'] = [
     'title' => t('Title seen while adding relationship'),
     'help' => t('More information about the relationship'),
 
-    'relationship' => array(
+    'relationship' => [
       // Views name of the table being joined to from foo.
       'base' => 'example_table',
       // Database field name in example_table for the join.
@@ -494,8 +494,8 @@ function hook_views_data_alter(array &$data) {
       // ID of relationship handler plugin to use.
       'id' => 'standard',
       'label' => t('Default label for relationship'),
-    ),
-  );
+    ],
+  ];
 
   // Note that the $data array is not returned – it is modified by reference.
 }
@@ -525,12 +525,12 @@ function hook_field_views_data(\Drupal\field\FieldStorageConfigInterface $field_
   $data = views_field_default_views_data($field_storage);
   foreach ($data as $table_name => $table_data) {
     // Add the relationship only on the target_id field.
-    $data[$table_name][$field_storage->getName() . '_target_id']['relationship'] = array(
+    $data[$table_name][$field_storage->getName() . '_target_id']['relationship'] = [
       'id' => 'standard',
       'base' => 'file_managed',
       'base field' => 'target_id',
-      'label' => t('image from @field_name', array('@field_name' => $field_storage->getName())),
-    );
+      'label' => t('image from @field_name', ['@field_name' => $field_storage->getName()]),
+    ];
   }
 
   return $data;
@@ -563,9 +563,9 @@ function hook_field_views_data_alter(array &$data, \Drupal\field\FieldStorageCon
 
   list($label) = views_entity_field_label($entity_type_id, $field_name);
 
-  $data['file_managed'][$pseudo_field_name]['relationship'] = array(
-    'title' => t('@entity using @field', array('@entity' => $entity_type->getLabel(), '@field' => $label)),
-    'help' => t('Relate each @entity with a @field set to the image.', array('@entity' => $entity_type->getLabel(), '@field' => $label)),
+  $data['file_managed'][$pseudo_field_name]['relationship'] = [
+    'title' => t('@entity using @field', ['@entity' => $entity_type->getLabel(), '@field' => $label]),
+    'help' => t('Relate each @entity with a @field set to the image.', ['@entity' => $entity_type->getLabel(), '@field' => $label]),
     'id' => 'entity_reverse',
     'field_name' => $field_name,
     'entity_type' => $entity_type_id,
@@ -574,14 +574,14 @@ function hook_field_views_data_alter(array &$data, \Drupal\field\FieldStorageCon
     'base' => $entity_type->getBaseTable(),
     'base field' => $entity_type->getKey('id'),
     'label' => $field_name,
-    'join_extra' => array(
-      0 => array(
+    'join_extra' => [
+      0 => [
         'field' => 'deleted',
         'value' => 0,
         'numeric' => TRUE,
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
 
 /**
@@ -620,9 +620,9 @@ function hook_field_views_data_views_data_alter(array &$data, \Drupal\field\Fiel
   $table_mapping = \Drupal::entityManager()->getStorage($entity_type_id)->getTableMapping();
 
   // Views data for this field is in $data[$data_key].
-  $data[$data_key][$pseudo_field_name]['relationship'] = array(
-    'title' => t('@entity using @field', array('@entity' => $entity_type->getLabel(), '@field' => $label)),
-    'help' => t('Relate each @entity with a @field set to the term.', array('@entity' => $entity_type->getLabel(), '@field' => $label)),
+  $data[$data_key][$pseudo_field_name]['relationship'] = [
+    'title' => t('@entity using @field', ['@entity' => $entity_type->getLabel(), '@field' => $label]),
+    'help' => t('Relate each @entity with a @field set to the term.', ['@entity' => $entity_type->getLabel(), '@field' => $label]),
     'id' => 'entity_reverse',
     'field_name' => $field_name,
     'entity_type' => $entity_type_id,
@@ -631,14 +631,14 @@ function hook_field_views_data_views_data_alter(array &$data, \Drupal\field\Fiel
     'base' => $entity_type->getBaseTable(),
     'base field' => $entity_type->getKey('id'),
     'label' => $field_name,
-    'join_extra' => array(
-      0 => array(
+    'join_extra' => [
+      0 => [
         'field' => 'deleted',
         'value' => 0,
         'numeric' => TRUE,
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 }
 
 /**
@@ -659,12 +659,12 @@ function hook_field_views_data_views_data_alter(array &$data, \Drupal\field\Fiel
  */
 function hook_views_query_substitutions(ViewExecutable $view) {
   // Example from views_views_query_substitutions().
-  return array(
+  return [
     '***CURRENT_VERSION***' => \Drupal::VERSION,
     '***CURRENT_TIME***' => REQUEST_TIME,
     '***LANGUAGE_language_content***' => \Drupal::languageManager()->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId(),
     PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT => \Drupal::languageManager()->getDefaultLanguage()->getId(),
-  );
+  ];
 }
 
 /**
@@ -676,9 +676,9 @@ function hook_views_query_substitutions(ViewExecutable $view) {
  *   is already marked safe.
  */
 function hook_views_form_substitutions() {
-  return array(
+  return [
     '<!--views-form-example-substitutions-->' => 'Example Substitution',
-  );
+  ];
 }
 
 /**
@@ -771,7 +771,7 @@ function hook_views_pre_execute(ViewExecutable $view) {
   $account = \Drupal::currentUser();
 
   if (count($view->query->tables) > 2 && $account->hasPermission('administer views')) {
-    drupal_set_message(t('The view %view may be heavy to execute.', array('%view' => $view->id())), 'warning');
+    drupal_set_message(t('The view %view may be heavy to execute.', ['%view' => $view->id()]), 'warning');
   }
 }
 
@@ -882,11 +882,11 @@ function hook_views_query_alter(ViewExecutable $view, QueryPluginBase $query) {
         // If this is the part of the query filtering on title, chang the
         // condition to filter on node ID.
         if ($condition['field'] == 'node.title') {
-          $condition = array(
+          $condition = [
             'field' => 'node.nid',
             'value' => $view->exposed_raw_input['title'],
             'operator' => '=',
-          );
+          ];
         }
       }
     }
@@ -915,10 +915,10 @@ function hook_views_query_alter(ViewExecutable $view, QueryPluginBase $query) {
 function hook_views_preview_info_alter(array &$rows, ViewExecutable $view) {
   // Adds information about the tables being queried by the view to the query
   // part of the info box.
-  $rows['query'][] = array(
+  $rows['query'][] = [
     t('<strong>Table queue</strong>'),
     count($view->query->table_queue) . ': (' . implode(', ', array_keys($view->query->table_queue)) . ')',
-  );
+  ];
 }
 
 /**
@@ -938,7 +938,7 @@ function hook_views_preview_info_alter(array &$rows, ViewExecutable $view) {
 function hook_views_ui_display_top_links_alter(array &$links, ViewExecutable $view, $display_id) {
   // Put the export link first in the list.
   if (isset($links['export'])) {
-    $links = array('export' => $links['export']) + $links;
+    $links = ['export' => $links['export']] + $links;
   }
 }
 
@@ -953,7 +953,7 @@ function hook_views_ui_display_top_links_alter(array &$links, ViewExecutable $vi
  * @see views_invalidate_cache()
  */
 function hook_views_invalidate_cache() {
-  \Drupal\Core\Cache\Cache::invalidateTags(array('views'));
+  \Drupal\Core\Cache\Cache::invalidateTags(['views']);
 }
 
 /**
diff --git a/core/modules/views/views.module b/core/modules/views/views.module
index 96e6dd3dcbf5a311b570606b6ccad59ae52abea4..f9bd098169c5b38fbec913b89806a88f3c84e0b3 100644
--- a/core/modules/views/views.module
+++ b/core/modules/views/views.module
@@ -28,14 +28,14 @@ function views_help($route_name, RouteMatchInterface $route_match) {
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
       $output .= '<p>' . t('The Views module provides a back end to fetch information from content, user accounts, taxonomy terms, and other entities from the database and present it to the user as a grid, HTML list, table, unformatted list, etc. The resulting displays are known generally as <em>views</em>.') . '</p>';
-      $output .= '<p>' . t('For more information, see the <a href=":views">online documentation for the Views module</a>.', array(':views' => 'https://www.drupal.org/documentation/modules/views')) . '</p>';
-      $output .= '<p>' . t('In order to create and modify your own views using the administration and configuration user interface, you will need to enable either the Views UI module in core or a contributed module that provides a user interface for Views. See the <a href=":views-ui">Views UI module help page</a> for more information.', array(':views-ui' => (\Drupal::moduleHandler()->moduleExists('views_ui')) ? \Drupal::url('help.page', array('name' => 'views_ui')) : '#')) . '</p>';
+      $output .= '<p>' . t('For more information, see the <a href=":views">online documentation for the Views module</a>.', [':views' => 'https://www.drupal.org/documentation/modules/views']) . '</p>';
+      $output .= '<p>' . t('In order to create and modify your own views using the administration and configuration user interface, you will need to enable either the Views UI module in core or a contributed module that provides a user interface for Views. See the <a href=":views-ui">Views UI module help page</a> for more information.', [':views-ui' => (\Drupal::moduleHandler()->moduleExists('views_ui')) ? \Drupal::url('help.page', ['name' => 'views_ui']) : '#']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Adding functionality to administrative pages') . '</dt>';
       $output .= '<dd>' . t('The Views module adds functionality to some core administration pages. For example, <em>admin/content</em> uses Views to filter and sort content. With Views uninstalled, <em>admin/content</em> is more limited.') . '</dd>';
       $output .= '<dt>' . t('Expanding Views functionality') . '</dt>';
-      $output .= '<dd>' . t('Contributed projects that support the Views module can be found in the <a href=":node">online documentation for Views-related contributed modules</a>.', array(':node' => 'https://www.drupal.org/documentation/modules/views/add-ons')) . '</dd>';
+      $output .= '<dd>' . t('Contributed projects that support the Views module can be found in the <a href=":node">online documentation for Views-related contributed modules</a>.', [':node' => 'https://www.drupal.org/documentation/modules/views/add-ons']) . '</dd>';
       $output .= '<dt>' . t('Improving table accessibility') . '</dt>';
       $output .= '<dd>' . t('Views tables include semantic markup to improve accessibility. Data cells are automatically associated with header cells through id and header attributes. To improve the accessibility of your tables you can add descriptive elements within the Views table settings. The <em>caption</em> element can introduce context for a table, making it easier to understand. The <em>summary</em> element can provide an overview of how the data has been organized and how to navigate the table. Both the caption and summary are visible by default and also implemented according to HTML5 guidelines.') . '</dd>';
       $output .= '<dt>' . t('Working with multilingual views') . '</dt>';
@@ -53,10 +53,10 @@ function views_help($route_name, RouteMatchInterface $route_match) {
 function views_views_pre_render($view) {
   // If using AJAX, send identifying data about this view.
   if ($view->ajaxEnabled() && empty($view->is_attachment) && empty($view->live_preview)) {
-    $view->element['#attached']['drupalSettings']['views'] = array(
+    $view->element['#attached']['drupalSettings']['views'] = [
       'ajax_path' => \Drupal::url('views.ajax'),
-      'ajaxViews' => array(
-        'views_dom_id:' . $view->dom_id => array(
+      'ajaxViews' => [
+        'views_dom_id:' . $view->dom_id => [
           'view_name' => $view->storage->id(),
           'view_display_id' => $view->current_display,
           'view_args' => Html::escape(implode('/', $view->args)),
@@ -66,9 +66,9 @@ function views_views_pre_render($view) {
           // To fit multiple views on a page, the programmer may have
           // overridden the display's pager_element.
           'pager_element' => isset($view->pager) ? $view->pager->getPagerId() : 0,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     $view->element['#attached']['library'][] = 'views/views.ajax';
   }
 
@@ -85,50 +85,50 @@ function views_theme($existing, $type, $theme, $path) {
   \Drupal::moduleHandler()->loadInclude('views', 'inc', 'views.theme');
 
   // Some quasi clever array merging here.
-  $base = array(
+  $base = [
     'file' => 'views.theme.inc',
-  );
+  ];
 
   // Our extra version of pager from pager.inc
-  $hooks['views_mini_pager'] = $base + array(
-    'variables' => array('tags' => array(), 'quantity' => 9, 'element' => 0, 'parameters' => array()),
-  );
+  $hooks['views_mini_pager'] = $base + [
+    'variables' => ['tags' => [], 'quantity' => 9, 'element' => 0, 'parameters' => []],
+  ];
 
-  $variables = array(
+  $variables = [
     // For displays, we pass in a dummy array as the first parameter, since
     // $view is an object but the core contextual_preprocess() function only
     // attaches contextual links when the primary theme argument is an array.
-    'display' => array(
-      'view_array' => array(),
+    'display' => [
+      'view_array' => [],
       'view' => NULL,
-      'rows' => array(),
-      'header' => array(),
-      'footer' => array(),
-      'empty' => array(),
-      'exposed' => array(),
-      'more' => array(),
-      'feed_icons' => array(),
-      'pager' => array(),
+      'rows' => [],
+      'header' => [],
+      'footer' => [],
+      'empty' => [],
+      'exposed' => [],
+      'more' => [],
+      'feed_icons' => [],
+      'pager' => [],
       'title' => '',
-      'attachment_before' => array(),
-      'attachment_after' => array(),
-    ),
-    'style' => array('view' => NULL, 'options' => NULL, 'rows' => NULL, 'title' => NULL),
-    'row' => array('view' => NULL, 'options' => NULL, 'row' => NULL, 'field_alias' => NULL),
-    'exposed_form' => array('view' => NULL, 'options' => NULL),
-    'pager' => array(
+      'attachment_before' => [],
+      'attachment_after' => [],
+    ],
+    'style' => ['view' => NULL, 'options' => NULL, 'rows' => NULL, 'title' => NULL],
+    'row' => ['view' => NULL, 'options' => NULL, 'row' => NULL, 'field_alias' => NULL],
+    'exposed_form' => ['view' => NULL, 'options' => NULL],
+    'pager' => [
       'view' => NULL, 'options' => NULL,
-      'tags' => array(), 'quantity' => 9, 'element' => 0, 'parameters' => array()
-    ),
-  );
+      'tags' => [], 'quantity' => 9, 'element' => 0, 'parameters' => []
+    ],
+  ];
 
   // Default view themes
-  $hooks['views_view_field'] = $base + array(
-    'variables' => array('view' => NULL, 'field' => NULL, 'row' => NULL),
-  );
-  $hooks['views_view_grouping'] = $base + array(
-    'variables' => array('view' => NULL, 'grouping' => NULL, 'grouping_level' => NULL, 'rows' => NULL, 'title' => NULL),
-  );
+  $hooks['views_view_field'] = $base + [
+    'variables' => ['view' => NULL, 'field' => NULL, 'row' => NULL],
+  ];
+  $hooks['views_view_grouping'] = $base + [
+    'variables' => ['view' => NULL, 'grouping' => NULL, 'grouping_level' => NULL, 'rows' => NULL, 'title' => NULL],
+  ];
 
   // Only display, pager, row, and style plugins can provide theme hooks.
   $plugin_types = [
@@ -138,7 +138,7 @@ function views_theme($existing, $type, $theme, $path) {
     'style',
     'exposed_form',
   ];
-  $plugins = array();
+  $plugins = [];
   foreach ($plugin_types as $plugin_type) {
     $plugins[$plugin_type] = Views::pluginManager($plugin_type)->getDefinitions();
   }
@@ -164,9 +164,9 @@ function views_theme($existing, $type, $theme, $path) {
         continue;
       }
 
-      $hooks[$def['theme']] = array(
+      $hooks[$def['theme']] = [
         'variables' => $variables[$type],
-      );
+      ];
 
       // We always use the module directory as base dir.
       $module_dir = drupal_get_path('module', $def['provider']);
@@ -175,7 +175,7 @@ function views_theme($existing, $type, $theme, $path) {
       // For the views module we ensure views.theme.inc is included.
       if ($def['provider'] == 'views') {
         if (!isset($hooks[$def['theme']]['includes'])) {
-          $hooks[$def['theme']]['includes'] = array();
+          $hooks[$def['theme']]['includes'] = [];
         }
         if (!in_array('views.theme.inc', $hooks[$def['theme']]['includes'])) {
           $hooks[$def['theme']]['includes'][] = $module_dir . '/views.theme.inc';
@@ -210,13 +210,13 @@ function views_theme($existing, $type, $theme, $path) {
     }
   }
 
-  $hooks['views_form_views_form'] = $base + array(
+  $hooks['views_form_views_form'] = $base + [
     'render element' => 'form',
-  );
+  ];
 
-  $hooks['views_exposed_form'] = $base + array(
+  $hooks['views_exposed_form'] = $base + [
     'render element' => 'form',
-  );
+  ];
 
   return $hooks;
 }
@@ -378,13 +378,13 @@ function views_add_contextual_links(&$render_element, $location, $display_id, ar
     // set 'contextual_links_locations' to, e.g., {""}.)
 
     if (!isset($plugin['contextual_links_locations'])) {
-      $plugin['contextual_links_locations'] = array('view');
+      $plugin['contextual_links_locations'] = ['view'];
     }
-    elseif ($plugin['contextual_links_locations'] == array() || $plugin['contextual_links_locations'] == array('')) {
-      $plugin['contextual_links_locations'] = array();
+    elseif ($plugin['contextual_links_locations'] == [] || $plugin['contextual_links_locations'] == ['']) {
+      $plugin['contextual_links_locations'] = [];
     }
     else {
-      $plugin += array('contextual_links_locations' => array('view'));
+      $plugin += ['contextual_links_locations' => ['view']];
     }
 
     // On exposed_forms blocks contextual links should always be visible.
@@ -392,7 +392,7 @@ function views_add_contextual_links(&$render_element, $location, $display_id, ar
     $has_links = !empty($plugin['contextual links']) && !empty($plugin['contextual_links_locations']);
     if ($has_links && in_array($location, $plugin['contextual_links_locations'])) {
       foreach ($plugin['contextual links'] as $group => $link) {
-        $args = array();
+        $args = [];
         $valid = TRUE;
         if (!empty($link['route_parameters_names'])) {
           $view_storage = \Drupal::entityManager()
@@ -416,14 +416,14 @@ function views_add_contextual_links(&$render_element, $location, $display_id, ar
         // array.
         if ($valid) {
           $render_element['#views_contextual_links'] = TRUE;
-          $render_element['#contextual_links'][$group] = array(
+          $render_element['#contextual_links'][$group] = [
             'route_parameters' => $args,
-            'metadata' => array(
+            'metadata' => [
               'location' => $location,
               'name' => $view_id,
               'display_id' => $display_id,
-            ),
-          );
+            ],
+          ];
           // If we're setting contextual links on a page, for a page view, for a
           // user that may use contextual links, attach Views' contextual links
           // JavaScript.
@@ -508,23 +508,23 @@ function &views_get_current_view() {
  * Implements hook_hook_info().
  */
 function views_hook_info() {
-  $hooks = array();
+  $hooks = [];
 
-  $hooks += array_fill_keys(array(
+  $hooks += array_fill_keys([
     'views_data',
     'views_data_alter',
     'views_analyze',
     'views_invalidate_cache',
-  ), array('group' => 'views'));
+  ], ['group' => 'views']);
 
   // Register a views_plugins alter hook for all plugin types.
   foreach (ViewExecutable::getPluginTypes() as $type) {
-    $hooks['views_plugins_' . $type . '_alter'] = array(
+    $hooks['views_plugins_' . $type . '_alter'] = [
       'group' => 'views',
-    );
+    ];
   }
 
-  $hooks += array_fill_keys(array(
+  $hooks += array_fill_keys([
     'views_query_substitutions',
     'views_form_substitutions',
     'views_pre_view',
@@ -535,14 +535,14 @@ function views_hook_info() {
     'views_pre_render',
     'views_post_render',
     'views_query_alter',
-  ), array('group' => 'views_execution'));
+  ], ['group' => 'views_execution']);
 
-  $hooks['field_views_data'] = array(
+  $hooks['field_views_data'] = [
     'group' => 'views',
-  );
-  $hooks['field_views_data_alter'] = array(
+  ];
+  $hooks['field_views_data_alter'] = [
     'group' => 'views',
-  );
+  ];
 
   return $hooks;
 }
@@ -605,8 +605,8 @@ function views_disable_view(View $view) {
  */
 function views_pre_render_views_form_views_form($element) {
   // Placeholders and their substitutions (usually rendered form elements).
-  $search = array();
-  $replace = array();
+  $search = [];
+  $replace = [];
 
   // Add in substitutions provided by the form.
   foreach ($element['#substitutions']['#value'] as $substitution) {
@@ -788,7 +788,7 @@ function views_get_view_result($name, $display_id = NULL) {
     return $view->result;
   }
   else {
-    return array();
+    return [];
   }
 }
 
diff --git a/core/modules/views/views.theme.inc b/core/modules/views/views.theme.inc
index 8dcdf672b0248ccfd57d744e36eb091cccc68cf3..4866d1c22c2b7d543864b10319ee74096663f664 100644
--- a/core/modules/views/views.theme.inc
+++ b/core/modules/views/views.theme.inc
@@ -90,7 +90,7 @@ function template_preprocess_views_view_fields(&$variables) {
 
   // Loop through the fields for this view.
   $previous_inline = FALSE;
-  $variables['fields'] = array(); // ensure it's at least an empty array.
+  $variables['fields'] = []; // ensure it's at least an empty array.
   /** @var \Drupal\views\ResultRow $row */
   $row = $variables['row'];
   foreach ($view->field as $id => $field) {
@@ -107,7 +107,7 @@ function template_preprocess_views_view_fields(&$variables) {
 
       $object->element_type = $object->handler->elementType(TRUE, !$variables['options']['default_field_elements'], $object->inline);
       if ($object->element_type) {
-        $attributes = array();
+        $attributes = [];
         if ($object->handler->options['element_default_classes']) {
           $attributes['class'][] = 'field-content';
         }
@@ -141,7 +141,7 @@ function template_preprocess_views_view_fields(&$variables) {
 
       // Set up field wrapper attributes if field wrapper was set.
       if ($object->wrapper_element) {
-        $attributes = array();
+        $attributes = [];
         if ($object->handler->options['element_default_classes']) {
           $attributes['class'][] = 'views-field';
           $attributes['class'][] = 'views-field-' . $object->class;
@@ -169,7 +169,7 @@ function template_preprocess_views_view_fields(&$variables) {
 
         // Set up label attributes.
         if ($object->label_element) {
-          $attributes = array();
+          $attributes = [];
           if ($object->handler->options['element_default_classes']) {
             $attributes['class'][] = 'views-label';
             $attributes['class'][] = 'views-label-' . $object->class;
@@ -241,13 +241,13 @@ function template_preprocess_views_view_summary(&$variables) {
   $view = $variables['view'];
   $argument = $view->argument[$view->build_info['summary_level']];
 
-  $url_options = array();
+  $url_options = [];
 
   if (!empty($view->exposed_raw_input)) {
     $url_options['query'] = $view->exposed_raw_input;
   }
 
-  $active_urls = array(
+  $active_urls = [
     // Force system path.
     \Drupal::url('<current>', [], ['alias' => TRUE]),
     // Force system path.
@@ -256,13 +256,13 @@ function template_preprocess_views_view_summary(&$variables) {
     \Drupal::url('<current>'),
     // Could be an alias.
     Url::fromRouteMatch(\Drupal::routeMatch())->toString(),
-  );
+  ];
   $active_urls = array_combine($active_urls, $active_urls);
 
   // Collect all arguments foreach row, to be able to alter them for example
   // by the validator. This is not done per single argument value, because this
   // could cause performance problems.
-  $row_args = array();
+  $row_args = [];
 
   foreach ($variables['rows'] as $id => $row) {
     $row_args[$id] = $argument->summaryArgument($row);
@@ -270,7 +270,7 @@ function template_preprocess_views_view_summary(&$variables) {
   $argument->processSummaryArguments($row_args);
 
   foreach ($variables['rows'] as $id => $row) {
-    $variables['rows'][$id]->attributes = array();
+    $variables['rows'][$id]->attributes = [];
     $variables['rows'][$id]->link = $argument->summaryName($row);
     $args = $view->args;
     $args[$argument->position] = $row_args[$id];
@@ -329,25 +329,25 @@ function template_preprocess_views_view_summary_unformatted(&$variables) {
   $view = $variables['view'];
   $argument = $view->argument[$view->build_info['summary_level']];
 
-  $url_options = array();
+  $url_options = [];
 
   if (!empty($view->exposed_raw_input)) {
     $url_options['query'] = $view->exposed_raw_input;
   }
 
   $count = 0;
-  $active_urls = array(
+  $active_urls = [
     // Force system path.
     \Drupal::url('<current>', [], ['alias' => TRUE]),
     // Could be an alias.
     \Drupal::url('<current>'),
-  );
+  ];
   $active_urls = array_combine($active_urls, $active_urls);
 
   // Collect all arguments for each row, to be able to alter them for example
   // by the validator. This is not done per single argument value, because
   // this could cause performance problems.
-  $row_args = array();
+  $row_args = [];
   foreach ($variables['rows'] as $id => $row) {
     $row_args[$id] = $argument->summaryArgument($row);
   }
@@ -358,7 +358,7 @@ function template_preprocess_views_view_summary_unformatted(&$variables) {
     if ($count++) {
       $variables['rows'][$id]->separator = Xss::filterAdmin($variables['options']['separator']);
     }
-    $variables['rows'][$id]->attributes = array();
+    $variables['rows'][$id]->attributes = [];
     $variables['rows'][$id]->link = $argument->summaryName($row);
     $args = $view->args;
     $args[$argument->position] = $row_args[$id];
@@ -417,8 +417,8 @@ function template_preprocess_views_view_table(&$variables) {
   // so that it can get rebuilt.
   // Store rows so that they may be used by further preprocess functions.
   $result = $variables['result'] = $variables['rows'];
-  $variables['rows'] = array();
-  $variables['header'] = array();
+  $variables['rows'] = [];
+  $variables['header'] = [];
 
   $options = $view->style_plugin->options;
   $handler = $view->style_plugin;
@@ -466,19 +466,19 @@ function template_preprocess_views_view_table(&$variables) {
           $initial = ($order == 'asc') ? 'desc' : 'asc';
         }
 
-        $title = t('sort by @s', array('@s' => $label));
+        $title = t('sort by @s', ['@s' => $label]);
         if ($active == $field) {
-          $variables['header'][$field]['sort_indicator'] = array(
+          $variables['header'][$field]['sort_indicator'] = [
             '#theme' => 'tablesort_indicator',
             '#style' => $initial,
-          );
+          ];
         }
 
         $query['order'] = $field;
         $query['sort'] = $initial;
-        $link_options = array(
+        $link_options = [
           'query' => $query,
-        );
+        ];
         $url = new Url($route_name, [], $link_options);
         $variables['header'][$field]['url'] = $url->toString();
         $variables['header'][$field]['content'] = $label;
@@ -487,7 +487,7 @@ function template_preprocess_views_view_table(&$variables) {
 
       $variables['header'][$field]['default_classes'] = $fields[$field]->options['element_default_classes'];
       // Set up the header label class.
-      $variables['header'][$field]['attributes'] = array();
+      $variables['header'][$field]['attributes'] = [];
       $class = $fields[$field]->elementLabelClasses(0);
       if ($class) {
         $variables['header'][$field]['attributes']['class'][] = $class;
@@ -543,7 +543,7 @@ function template_preprocess_views_view_table(&$variables) {
 
       // Add field classes.
       if (!isset($column_reference['attributes'])) {
-        $column_reference['attributes'] = array();
+        $column_reference['attributes'] = [];
       }
 
       if ($classes = $fields[$field]->elementClasses($num)) {
@@ -557,7 +557,7 @@ function template_preprocess_views_view_table(&$variables) {
 
       // Improves accessibility of complex tables.
       if (isset($variables['header'][$field]['attributes']['id'])) {
-        $column_reference['attributes']['headers'] = array($variables['header'][$field]['attributes']['id']);
+        $column_reference['attributes']['headers'] = [$variables['header'][$field]['attributes']['id']];
       }
 
       if (!empty($fields[$field])) {
@@ -604,11 +604,11 @@ function template_preprocess_views_view_table(&$variables) {
 
   // Hide table header if all labels are empty.
   if (!$has_header_labels) {
-    $variables['header'] = array();
+    $variables['header'] = [];
   }
 
   foreach ($variables['rows'] as $num => $row) {
-    $variables['rows'][$num]['attributes'] = array();
+    $variables['rows'][$num]['attributes'] = [];
     if ($row_class = $handler->getRowClass($num)) {
       $variables['rows'][$num]['attributes']['class'][] = $row_class;
     }
@@ -620,10 +620,10 @@ function template_preprocess_views_view_table(&$variables) {
     $variables['rows'][0]['columns'][0]['content'][0]['field_output'] = $build;
     $variables['rows'][0]['attributes'] = new Attribute(['class' => ['odd']]);
     // Calculate the amounts of rows with output.
-    $variables['rows'][0]['columns'][0]['attributes'] = new Attribute(array(
+    $variables['rows'][0]['columns'][0]['attributes'] = new Attribute([
       'colspan' => count($variables['header']),
       'class' => ['views-empty'],
-    ));
+    ]);
   }
 
   $variables['sticky'] = FALSE;
@@ -678,7 +678,7 @@ function template_preprocess_views_view_grid(&$variables) {
 
   $col = 0;
   $row = 0;
-  $items = array();
+  $items = [];
   $remainders = count($variables['rows']) % $options['columns'];
   $num_rows = floor(count($variables['rows']) / $options['columns']);
 
@@ -695,7 +695,7 @@ function template_preprocess_views_view_grid(&$variables) {
 
     // Create attributes for rows.
     if (!$horizontal || ($horizontal && empty($items[$row]['attributes']))) {
-      $row_attributes = array('class' => array());
+      $row_attributes = ['class' => []];
       // Add custom row classes.
       $row_class = array_filter(explode(' ', $variables['view']->style_plugin->getCustomClass($result_index, 'row')));
       if (!empty($row_class)) {
@@ -712,7 +712,7 @@ function template_preprocess_views_view_grid(&$variables) {
 
     // Create attributes for columns.
     if ($horizontal || (!$horizontal && empty($items[$col]['attributes']))) {
-      $col_attributes = array('class' => array());
+      $col_attributes = ['class' => []];
       // Add default views column classes.
       // Add custom column classes.
       $col_class = array_filter(explode(' ', $variables['view']->style_plugin->getCustomClass($result_index, 'col')));
@@ -781,7 +781,7 @@ function template_preprocess_views_view_unformatted(&$variables) {
 
   $variables['default_row_class'] = !empty($options['default_row_class']);
   foreach ($rows as $id => $row) {
-    $variables['rows'][$id] = array();
+    $variables['rows'][$id] = [];
     $variables['rows'][$id]['content'] = $row;
     $variables['rows'][$id]['attributes'] = new Attribute();
     if ($row_class = $view->style_plugin->getRowClass($id)) {
@@ -808,7 +808,7 @@ function template_preprocess_views_view_list(&$variables) {
     $class = array_map('\Drupal\Component\Utility\Html::cleanCssIdentifier', $class);
 
     // Initialize a new attribute class for $class.
-    $variables['list']['attributes'] = new Attribute(array('class' => $class));
+    $variables['list']['attributes'] = new Attribute(['class' => $class]);
   }
 
   // Fetch wrapper classes from handler options.
@@ -864,7 +864,7 @@ function template_preprocess_views_view_rss(&$variables) {
 
   /** @var \Drupal\Core\Url $url */
   if ($url) {
-    $url_options = array('absolute' => TRUE);
+    $url_options = ['absolute' => TRUE];
     if (!empty($view->exposed_raw_input)) {
       $url_options['query'] = $view->exposed_raw_input;
     }
@@ -913,7 +913,7 @@ function template_preprocess_views_view_row_rss(&$variables) {
     $variables['description'] = (string) \Drupal::service('renderer')->render($item->description);
   }
 
-  $variables['item_elements'] = array();
+  $variables['item_elements'] = [];
   foreach ($item->elements as $element) {
     if (isset($element['attributes']) && is_array($element['attributes'])) {
       $element['attributes'] = new Attribute($element['attributes']);
@@ -1022,9 +1022,9 @@ function template_preprocess_views_mini_pager(&$variables) {
   $variables['items']['current'] = $pager_page_array[$element] + 1;
 
   if ($pager_total[$element] > 1 && $pager_page_array[$element] > 0) {
-    $options = array(
+    $options = [
       'query' => pager_query_add_page($parameters, $element, $pager_page_array[$element] - 1),
-    );
+    ];
     $variables['items']['previous']['href'] = \Drupal::url('<current>', [], $options);
     if (isset($tags[1])) {
       $variables['items']['previous']['text'] = $tags[1];
@@ -1033,9 +1033,9 @@ function template_preprocess_views_mini_pager(&$variables) {
   }
 
   if ($pager_page_array[$element] < ($pager_total[$element] - 1)) {
-    $options = array(
+    $options = [
       'query' => pager_query_add_page($parameters, $element, $pager_page_array[$element] + 1),
-    );
+    ];
     $variables['items']['next']['href'] = \Drupal::url('<current>', [], $options);
     if (isset($tags[3])) {
       $variables['items']['next']['text'] = $tags[3];
diff --git a/core/modules/views/views.tokens.inc b/core/modules/views/views.tokens.inc
index defd34fd3b5b3f7bb1fb16291f3a4e04a4b9dc70..9bf5470a660e66d232c9c2e66559f62ce25e397e 100644
--- a/core/modules/views/views.tokens.inc
+++ b/core/modules/views/views.tokens.inc
@@ -11,56 +11,56 @@
  * Implements hook_token_info().
  */
 function views_token_info() {
-  $info['types']['view'] = array(
+  $info['types']['view'] = [
     'name' => t('View', [], ['context' => 'View entity type']),
     'description' => t('Tokens related to views.'),
     'needs-data' => 'view',
-  );
-  $info['tokens']['view']['label'] = array(
+  ];
+  $info['tokens']['view']['label'] = [
     'name' => t('Label'),
     'description' => t('The label of the view.'),
-  );
-  $info['tokens']['view']['description'] = array(
+  ];
+  $info['tokens']['view']['description'] = [
     'name' => t('Description'),
     'description' => t('The description of the view.'),
-  );
-  $info['tokens']['view']['id'] = array(
+  ];
+  $info['tokens']['view']['id'] = [
     'name' => t('ID'),
     'description' => t('The machine-readable ID of the view.'),
-  );
-  $info['tokens']['view']['title'] = array(
+  ];
+  $info['tokens']['view']['title'] = [
     'name' => t('Title'),
     'description' => t('The title of current display of the view.'),
-  );
-  $info['tokens']['view']['url'] = array(
+  ];
+  $info['tokens']['view']['url'] = [
     'name' => t('URL'),
     'description' => t('The URL of the view.'),
     'type' => 'url',
-  );
-  $info['tokens']['view']['base-table'] = array(
+  ];
+  $info['tokens']['view']['base-table'] = [
     'name' => t('Base table'),
     'description' => t('The base table used for this view.'),
-  );
-  $info['tokens']['view']['base-field'] = array(
+  ];
+  $info['tokens']['view']['base-field'] = [
     'name' => t('Base field'),
     'description' => t('The base field used for this view.'),
-  );
-  $info['tokens']['view']['total-rows'] = array(
+  ];
+  $info['tokens']['view']['total-rows'] = [
     'name' => t('Total rows'),
     'description' => t('The total amount of results returned from the view. The current display will be used.'),
-  );
-  $info['tokens']['view']['items-per-page'] = array(
+  ];
+  $info['tokens']['view']['items-per-page'] = [
     'name' => t('Items per page'),
     'description' => t('The number of items per page.'),
-  );
-  $info['tokens']['view']['current-page'] = array(
+  ];
+  $info['tokens']['view']['current-page'] = [
     'name' => t('Current page'),
     'description' => t('The current page of results the view is on.'),
-  );
-  $info['tokens']['view']['page-count'] = array(
+  ];
+  $info['tokens']['view']['page-count'] = [
     'name' => t('Page count'),
     'description' => t('The total page count.'),
-  );
+  ];
 
   return $info;
 }
@@ -69,11 +69,11 @@ function views_token_info() {
  * Implements hook_tokens().
  */
 function views_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
-  $url_options = array('absolute' => TRUE);
+  $url_options = ['absolute' => TRUE];
   if (isset($options['language'])) {
     $url_options['language'] = $options['language'];
   }
-  $replacements = array();
+  $replacements = [];
 
   if ($type == 'view' && !empty($data['view'])) {
     /** @var \Drupal\views\ViewExecutable $view */
diff --git a/core/modules/views/views.views.inc b/core/modules/views/views.views.inc
index 93a659cda203ae79e4a7fb21769fd6d72c0fa241..0bd5f270057f80519186480d35c257f50e5516d9 100644
--- a/core/modules/views/views.views.inc
+++ b/core/modules/views/views.views.inc
@@ -18,129 +18,129 @@
  */
 function views_views_data() {
   $data['views']['table']['group'] = t('Global');
-  $data['views']['table']['join'] = array(
+  $data['views']['table']['join'] = [
   // #global is a special flag which allows a table to appear all the time.
-  '#global' => array(),
-  );
+  '#global' => [],
+  ];
 
-  $data['views']['random'] = array(
+  $data['views']['random'] = [
   'title' => t('Random'),
   'help' => t('Randomize the display order.'),
-  'sort' => array(
+  'sort' => [
     'id' => 'random',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['null'] = array(
+  $data['views']['null'] = [
     'title' => t('Null'),
     'help' => t('Allow a contextual filter value to be ignored. The query will not be altered by this contextual filter value. Can be used when contextual filter values come from the URL, and a part of the URL needs to be ignored.'),
-    'argument' => array(
+    'argument' => [
       'id' => 'null',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['nothing'] = array(
+  $data['views']['nothing'] = [
     'title' => t('Custom text'),
     'help' => t('Provide custom text or link.'),
-    'field' => array(
+    'field' => [
       'id' => 'custom',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['counter'] = array(
+  $data['views']['counter'] = [
     'title' => t('View result counter'),
     'help' => t('Displays the actual position of the view result'),
-    'field' => array(
+    'field' => [
       'id' => 'counter',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['area'] = array(
+  $data['views']['area'] = [
     'title' => t('Text area'),
     'help' => t('Provide markup text for the area.'),
-    'area' => array(
+    'area' => [
       'id' => 'text',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['area_text_custom'] = array(
+  $data['views']['area_text_custom'] = [
     'title' => t('Unfiltered text'),
     'help' => t('Add unrestricted, custom text or markup. This is similar to the custom text field.'),
-    'area' => array(
+    'area' => [
       'id' => 'text_custom',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['title'] = array(
+  $data['views']['title'] = [
     'title' => t('Title override'),
     'help' => t('Override the default view title for this view. This is useful to display an alternative title when a view is empty.'),
-    'area' => array(
+    'area' => [
       'id' => 'title',
       'sub_type' => 'empty',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['view'] = array(
+  $data['views']['view'] = [
     'title' => t('View area'),
     'help' => t('Insert a view inside an area.'),
-    'area' => array(
+    'area' => [
       'id' => 'view',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['result'] = array(
+  $data['views']['result'] = [
     'title' => t('Result summary'),
     'help' => t('Shows result summary, for example the items per page.'),
-    'area' => array(
+    'area' => [
       'id' => 'result',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['messages'] = array(
+  $data['views']['messages'] = [
     'title' => t('Messages'),
     'help' => t('Displays messages in an area.'),
-    'area' => array(
+    'area' => [
       'id' => 'messages',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['http_status_code'] = array(
+  $data['views']['http_status_code'] = [
     'title' => t('Response status code'),
     'help' => t('Alter the HTTP response status code used by this view, mostly helpful for empty results.'),
-    'area' => array(
+    'area' => [
       'id' => 'http_status_code',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['combine'] = array(
+  $data['views']['combine'] = [
    'title' => t('Combine fields filter'),
     'help' => t('Combine multiple fields together and search by them.'),
-    'filter' => array(
+    'filter' => [
       'id' => 'combine',
-    ),
-  );
+    ],
+  ];
 
-  $data['views']['dropbutton'] = array(
+  $data['views']['dropbutton'] = [
     'title' => t('Dropbutton'),
     'help' => t('Display fields in a dropbutton.'),
-    'field' => array(
+    'field' => [
       'id' => 'dropbutton',
-    ),
-  );
+    ],
+  ];
 
   // Registers an entity area handler per entity type.
   foreach (\Drupal::entityManager()->getDefinitions() as $entity_type_id => $entity_type) {
     // Excludes entity types, which cannot be rendered.
     if ($entity_type->hasViewBuilderClass()) {
       $label = $entity_type->getLabel();
-      $data['views']['entity_' . $entity_type_id] = array(
-        'title' => t('Rendered entity - @label', array('@label' => $label)),
-        'help' => t('Displays a rendered @label entity in an area.', array('@label' => $label)),
-        'area' => array(
+      $data['views']['entity_' . $entity_type_id] = [
+        'title' => t('Rendered entity - @label', ['@label' => $label]),
+        'help' => t('Displays a rendered @label entity in an area.', ['@label' => $label]),
+        'area' => [
           'entity_type' => $entity_type_id,
           'id' => 'entity',
-        ),
-      );
+        ],
+      ];
     }
   }
 
@@ -152,13 +152,13 @@ function views_views_data() {
     if (empty($actions)) {
       continue;
     }
-    $data[$entity_info->getBaseTable()][$entity_type . '_bulk_form'] = array(
+    $data[$entity_info->getBaseTable()][$entity_type . '_bulk_form'] = [
       'title' => t('Bulk update'),
       'help' => t('Allows users to apply an action to one or more items.'),
-      'field' => array(
+      'field' => [
         'id' => 'bulk_form',
-      ),
-    );
+      ],
+    ];
   }
 
   // Registers views data for the entity itself.
@@ -180,7 +180,7 @@ function views_views_data() {
     /** @var \Drupal\field\FieldStorageConfigInterface $field_storage */
     foreach ($entity_manager->getStorage('field_storage_config')->loadMultiple() as $field_storage) {
       if (_views_field_get_entity_type_storage($field_storage)) {
-        $result = (array) $module_handler->invoke($field_storage->getTypeProvider(), 'field_views_data', array($field_storage));
+        $result = (array) $module_handler->invoke($field_storage->getTypeProvider(), 'field_views_data', [$field_storage]);
         if (empty($result)) {
           $result = views_field_default_views_data($field_storage);
         }
@@ -245,8 +245,8 @@ function _views_field_get_entity_type_storage(FieldStorageConfigInterface $field
  * Therefore it looks up in all bundles to find the most used field.
  */
 function views_entity_field_label($entity_type, $field_name) {
-  $label_counter = array();
-  $all_labels = array();
+  $label_counter = [];
+  $all_labels = [];
   // Count the amount of fields per label per field storage.
   foreach (array_keys(\Drupal::entityManager()->getBundleInfo($entity_type)) as $bundle) {
     $bundle_fields = array_filter(\Drupal::entityManager()->getFieldDefinitions($entity_type, $bundle), function ($field_definition) {
@@ -260,7 +260,7 @@ function views_entity_field_label($entity_type, $field_name) {
     }
   }
   if (empty($label_counter)) {
-    return array($field_name, $all_labels);
+    return [$field_name, $all_labels];
   }
   // Sort the field labels by it most used label and return the most used one.
   // If the counts are equal, sort by the label to ensure the result is
@@ -272,7 +272,7 @@ function views_entity_field_label($entity_type, $field_name) {
     return $label_counter[$a] > $label_counter[$b] ? -1 : 1;
   });
   $label_counter = array_keys($label_counter);
-  return array($label_counter[0], $all_labels);
+  return [$label_counter[0], $all_labels];
 }
 
 /**
@@ -285,7 +285,7 @@ function views_entity_field_label($entity_type, $field_name) {
  *   The default views data for the field.
  */
 function views_field_default_views_data(FieldStorageConfigInterface $field_storage) {
-  $data = array();
+  $data = [];
 
   // Check the field type is available.
   if (!\Drupal::service('plugin.manager.field.field_type')->hasDefinition($field_storage->getType())) {
@@ -319,7 +319,7 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
     // We cannot do anything if for some reason there is no base table.
     return $data;
   }
-  $entity_tables = array($base_table => $entity_type_id);
+  $entity_tables = [$base_table => $entity_type_id];
   // Some entities may not have a data table.
   $data_table = $entity_type->getDataTable();
   if ($data_table) {
@@ -339,69 +339,69 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
   // @todo Generalize this code to make it work with any table layout. See
   //   https://www.drupal.org/node/2079019.
   $table_mapping = $storage->getTableMapping();
-  $field_tables = array(
-    EntityStorageInterface::FIELD_LOAD_CURRENT => array(
+  $field_tables = [
+    EntityStorageInterface::FIELD_LOAD_CURRENT => [
       'table' => $table_mapping->getDedicatedDataTableName($field_storage),
       'alias' => "{$entity_type_id}__{$field_name}",
-    ),
-  );
+    ],
+  ];
   if ($supports_revisions) {
-    $field_tables[EntityStorageInterface::FIELD_LOAD_REVISION] = array(
+    $field_tables[EntityStorageInterface::FIELD_LOAD_REVISION] = [
       'table' => $table_mapping->getDedicatedRevisionTableName($field_storage),
       'alias' => "{$entity_type_id}_revision__{$field_name}",
-    );
+    ];
   }
 
   // Build the relationships between the field table and the entity tables.
   $table_alias = $field_tables[EntityStorageInterface::FIELD_LOAD_CURRENT]['alias'];
   if ($data_table) {
     // Tell Views how to join to the base table, via the data table.
-    $data[$table_alias]['table']['join'][$data_table] = array(
+    $data[$table_alias]['table']['join'][$data_table] = [
       'table' => $table_mapping->getDedicatedDataTableName($field_storage),
       'left_field' => $entity_type->getKey('id'),
       'field' => 'entity_id',
-      'extra' => array(
-        array('field' => 'deleted', 'value' => 0, 'numeric' => TRUE),
-        array('left_field' => 'langcode', 'field' => 'langcode'),
-      ),
-    );
+      'extra' => [
+        ['field' => 'deleted', 'value' => 0, 'numeric' => TRUE],
+        ['left_field' => 'langcode', 'field' => 'langcode'],
+      ],
+    ];
   }
   else {
     // If there is no data table, just join directly.
-    $data[$table_alias]['table']['join'][$base_table] = array(
+    $data[$table_alias]['table']['join'][$base_table] = [
       'table' => $table_mapping->getDedicatedDataTableName($field_storage),
       'left_field' => $entity_type->getKey('id'),
       'field' => 'entity_id',
-      'extra' => array(
-        array('field' => 'deleted', 'value' => 0, 'numeric' => TRUE),
-      ),
-    );
+      'extra' => [
+        ['field' => 'deleted', 'value' => 0, 'numeric' => TRUE],
+      ],
+    ];
   }
 
   if ($supports_revisions) {
     $table_alias = $field_tables[EntityStorageInterface::FIELD_LOAD_REVISION]['alias'];
     if ($entity_revision_data_table) {
       // Tell Views how to join to the revision table, via the data table.
-      $data[$table_alias]['table']['join'][$entity_revision_data_table] = array(
+      $data[$table_alias]['table']['join'][$entity_revision_data_table] = [
         'table' => $table_mapping->getDedicatedRevisionTableName($field_storage),
         'left_field' => $entity_type->getKey('revision'),
         'field' => 'revision_id',
-        'extra' => array(
-          array('field' => 'deleted', 'value' => 0, 'numeric' => TRUE),
-          array('left_field' => 'langcode', 'field' => 'langcode'),
-        ),
-      );
+        'extra' => [
+          ['field' => 'deleted', 'value' => 0, 'numeric' => TRUE],
+          ['left_field' => 'langcode', 'field' => 'langcode'],
+        ],
+      ];
     }
     else {
       // If there is no data table, just join directly.
-      $data[$table_alias]['table']['join'][$entity_revision_table] = array(
+      $data[$table_alias]['table']['join'][$entity_revision_table] = [
         'table' => $table_mapping->getDedicatedRevisionTableName($field_storage),
         'left_field' => $entity_type->getKey('revision'),
         'field' => 'revision_id',
-        'extra' => array(
-          array('field' => 'deleted', 'value' => 0, 'numeric' => TRUE),
-        ),
-      );
+        'extra' => [
+          ['field' => 'deleted', 'value' => 0, 'numeric' => TRUE],
+        ],
+      ];
     }
   }
 
@@ -409,7 +409,7 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
   // Get the list of bundles the field appears in.
   $bundles_names = $field_storage->getBundles();
   // Build the list of additional fields to add to queries.
-  $add_fields = array('delta', 'langcode', 'bundle');
+  $add_fields = ['delta', 'langcode', 'bundle'];
   foreach (array_keys($field_columns) as $column) {
     $add_fields[] = $table_mapping->getFieldColumnName($field_storage, $column);
   }
@@ -428,41 +428,41 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
       $field_alias = $field_name;
     }
     else {
-      $group = t('@group (historical data)', array('@group' => $group_name));
+      $group = t('@group (historical data)', ['@group' => $group_name]);
       $field_alias = $field_name . '-revision_id';
     }
 
-    $data[$table_alias][$field_alias] = array(
+    $data[$table_alias][$field_alias] = [
       'group' => $group,
       'title' => $label,
       'title short' => $label,
-      'help' => t('Appears in: @bundles.', array('@bundles' => implode(', ', $bundles_names))),
-    );
+      'help' => t('Appears in: @bundles.', ['@bundles' => implode(', ', $bundles_names)]),
+    ];
 
     // Go through and create a list of aliases for all possible combinations of
     // entity type + name.
-    $aliases = array();
-    $also_known = array();
+    $aliases = [];
+    $also_known = [];
     foreach ($all_labels as $label_name => $true) {
       if ($type == EntityStorageInterface::FIELD_LOAD_CURRENT) {
         if ($label != $label_name) {
-          $aliases[] = array(
+          $aliases[] = [
             'base' => $base_table,
             'group' => $group_name,
             'title' => $label_name,
-            'help' => t('This is an alias of @group: @field.', array('@group' => $group_name, '@field' => $label)),
-          );
-          $also_known[] = t('@group: @field', array('@group' => $group_name, '@field' => $label_name));
+            'help' => t('This is an alias of @group: @field.', ['@group' => $group_name, '@field' => $label]),
+          ];
+          $also_known[] = t('@group: @field', ['@group' => $group_name, '@field' => $label_name]);
         }
       }
       elseif ($supports_revisions && $label != $label_name) {
-        $aliases[] = array(
+        $aliases[] = [
           'base' => $table,
-          'group' => t('@group (historical data)', array('@group' => $group_name)),
+          'group' => t('@group (historical data)', ['@group' => $group_name]),
           'title' => $label_name,
-          'help' => t('This is an alias of @group: @field.', array('@group' => $group_name, '@field' => $label)),
-        );
-        $also_known[] = t('@group (historical data): @field', array('@group' => $group_name, '@field' => $label_name));
+          'help' => t('This is an alias of @group: @field.', ['@group' => $group_name, '@field' => $label]),
+        ];
+        $also_known[] = t('@group (historical data): @field', ['@group' => $group_name, '@field' => $label_name]);
       }
     }
     if ($aliases) {
@@ -481,7 +481,7 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
 
     $keys = array_keys($field_columns);
     $real_field = reset($keys);
-    $data[$table_alias][$field_alias]['field'] = array(
+    $data[$table_alias][$field_alias]['field'] = [
       'table' => $table,
       'id' => 'field',
       'field_name' => $field_name,
@@ -492,7 +492,7 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
       // Default the element type to div, let the UI change it if necessary.
       'element type' => 'div',
       'is revision' => $type == EntityStorageInterface::FIELD_LOAD_REVISION,
-    );
+    ];
   }
 
   // Expose data for each field property individually.
@@ -527,12 +527,12 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
     }
 
     if (count($field_columns) == 1 || $column == 'value') {
-      $title = t('@label (@name)', array('@label' => $label, '@name' => $field_name));
+      $title = t('@label (@name)', ['@label' => $label, '@name' => $field_name]);
       $title_short = $label;
     }
     else {
-      $title = t('@label (@name:@column)', array('@label' => $label, '@name' => $field_name, '@column' => $column));
-      $title_short = t('@label:@column', array('@label' => $label, '@column' => $column));
+      $title = t('@label (@name:@column)', ['@label' => $label, '@name' => $field_name, '@column' => $column]);
+      $title_short = t('@label:@column', ['@label' => $label, '@column' => $column]);
     }
 
     // Expose data for the property.
@@ -544,38 +544,38 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
         $group = $group_name;
       }
       else {
-        $group = t('@group (historical data)', array('@group' => $group_name));
+        $group = t('@group (historical data)', ['@group' => $group_name]);
       }
       $column_real_name = $table_mapping->getFieldColumnName($field_storage, $column);
 
       // Load all the fields from the table by default.
       $additional_fields = $table_mapping->getAllColumns($table);
 
-      $data[$table_alias][$column_real_name] = array(
+      $data[$table_alias][$column_real_name] = [
         'group' => $group,
         'title' => $title,
         'title short' => $title_short,
-        'help' => t('Appears in: @bundles.', array('@bundles' => implode(', ', $bundles_names))),
-      );
+        'help' => t('Appears in: @bundles.', ['@bundles' => implode(', ', $bundles_names)]),
+      ];
 
       // Go through and create a list of aliases for all possible combinations of
       // entity type + name.
-      $aliases = array();
-      $also_known = array();
+      $aliases = [];
+      $also_known = [];
       foreach ($all_labels as $label_name => $true) {
         if ($label != $label_name) {
           if (count($field_columns) == 1 || $column == 'value') {
-            $alias_title = t('@label (@name)', array('@label' => $label_name, '@name' => $field_name));
+            $alias_title = t('@label (@name)', ['@label' => $label_name, '@name' => $field_name]);
           }
           else {
-            $alias_title = t('@label (@name:@column)', array('@label' => $label_name, '@name' => $field_name, '@column' => $column));
+            $alias_title = t('@label (@name:@column)', ['@label' => $label_name, '@name' => $field_name, '@column' => $column]);
           }
-          $aliases[] = array(
+          $aliases[] = [
             'group' => $group_name,
             'title' => $alias_title,
-            'help' => t('This is an alias of @group: @field.', array('@group' => $group_name, '@field' => $title)),
-          );
-          $also_known[] = t('@group: @field', array('@group' => $group_name, '@field' => $title));
+            'help' => t('This is an alias of @group: @field.', ['@group' => $group_name, '@field' => $title]),
+          ];
+          $also_known[] = t('@group: @field', ['@group' => $group_name, '@field' => $title]);
         }
       }
       if ($aliases) {
@@ -592,7 +592,7 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
         $data[$table_alias][$column_real_name]['help'] = Markup::create($data[$table_alias][$column_real_name]['help'] . ' ' . t('Also known as:') . ' ' . implode(', ', $also_known));
       }
 
-      $data[$table_alias][$column_real_name]['argument'] = array(
+      $data[$table_alias][$column_real_name]['argument'] = [
         'field' => $column_real_name,
         'table' => $table,
         'id' => $argument,
@@ -600,8 +600,8 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
         'field_name' => $field_name,
         'entity_type' => $entity_type_id,
         'empty field name' => t('- No value -'),
-      );
-      $data[$table_alias][$column_real_name]['filter'] = array(
+      ];
+      $data[$table_alias][$column_real_name]['filter'] = [
         'field' => $column_real_name,
         'table' => $table,
         'id' => $filter,
@@ -609,16 +609,16 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
         'field_name' => $field_name,
         'entity_type' => $entity_type_id,
         'allow empty' => TRUE,
-      );
+      ];
       if (!empty($allow_sort)) {
-        $data[$table_alias][$column_real_name]['sort'] = array(
+        $data[$table_alias][$column_real_name]['sort'] = [
           'field' => $column_real_name,
           'table' => $table,
           'id' => $sort,
           'additional fields' => $additional_fields,
           'field_name' => $field_name,
           'entity_type' => $entity_type_id,
-        );
+        ];
       }
 
       // Set click sortable if there is a field definition.
@@ -628,19 +628,19 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
 
       // Expose additional delta column for multiple value fields.
       if ($field_storage->isMultiple()) {
-        $title_delta = t('@label (@name:delta)', array('@label' => $label, '@name' => $field_name));
-        $title_short_delta = t('@label:delta', array('@label' => $label));
+        $title_delta = t('@label (@name:delta)', ['@label' => $label, '@name' => $field_name]);
+        $title_short_delta = t('@label:delta', ['@label' => $label]);
 
-        $data[$table_alias]['delta'] = array(
+        $data[$table_alias]['delta'] = [
           'group' => $group,
           'title' => $title_delta,
           'title short' => $title_short_delta,
-          'help' => t('Delta - Appears in: @bundles.', array('@bundles' => implode(', ', $bundles_names))),
-        );
-        $data[$table_alias]['delta']['field'] = array(
+          'help' => t('Delta - Appears in: @bundles.', ['@bundles' => implode(', ', $bundles_names)]),
+        ];
+        $data[$table_alias]['delta']['field'] = [
           'id' => 'numeric',
-        );
-        $data[$table_alias]['delta']['argument'] = array(
+        ];
+        $data[$table_alias]['delta']['argument'] = [
           'field' => 'delta',
           'table' => $table,
           'id' => 'numeric',
@@ -648,8 +648,8 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
           'empty field name' => t('- No value -'),
           'field_name' => $field_name,
           'entity_type' => $entity_type_id,
-        );
-        $data[$table_alias]['delta']['filter'] = array(
+        ];
+        $data[$table_alias]['delta']['filter'] = [
           'field' => 'delta',
           'table' => $table,
           'id' => 'numeric',
@@ -657,15 +657,15 @@ function views_field_default_views_data(FieldStorageConfigInterface $field_stora
           'field_name' => $field_name,
           'entity_type' => $entity_type_id,
           'allow empty' => TRUE,
-        );
-        $data[$table_alias]['delta']['sort'] = array(
+        ];
+        $data[$table_alias]['delta']['sort'] = [
           'field' => 'delta',
           'table' => $table,
           'id' => 'standard',
           'additional fields' => $additional_fields,
           'field_name' => $field_name,
           'entity_type' => $entity_type_id,
-        );
+        ];
       }
     }
   }
@@ -704,30 +704,30 @@ function core_field_views_data(FieldStorageConfigInterface $field_storage) {
 
     // Provide a relationship for the entity type with the entity reference
     // field.
-    $args = array(
+    $args = [
       '@label' => $target_entity_type->getLabel(),
       '@field_name' => $field_name,
-    );
-    $data[$table_name][$field_name]['relationship'] = array(
+    ];
+    $data[$table_name][$field_name]['relationship'] = [
       'title' => t('@label referenced from @field_name', $args),
       'label' => t('@field_name: @label', $args),
       'group' => $entity_type->getLabel(),
-      'help' => t('Appears in: @bundles.', array('@bundles' => implode(', ', $field_storage->getBundles()))),
+      'help' => t('Appears in: @bundles.', ['@bundles' => implode(', ', $field_storage->getBundles())]),
       'id' => 'standard',
       'base' => $target_base_table,
       'entity type' => $target_entity_type_id,
       'base field' => $target_entity_type->getKey('id'),
       'relationship field' => $field_name . '_target_id',
-    );
+    ];
 
     // Provide a reverse relationship for the entity type that is referenced by
     // the field.
     $args['@entity'] = $entity_type->getLabel();
     $args['@label'] = $target_entity_type->getLowercaseLabel();
     $pseudo_field_name = 'reverse__' . $entity_type_id . '__' . $field_name;
-    $data[$target_base_table][$pseudo_field_name]['relationship'] = array(
+    $data[$target_base_table][$pseudo_field_name]['relationship'] = [
       'title' => t('@entity using @field_name', $args),
-      'label' => t('@field_name', array('@field_name' => $field_name)),
+      'label' => t('@field_name', ['@field_name' => $field_name]),
       'group' => $target_entity_type->getLabel(),
       'help' => t('Relate each @entity with a @field_name set to the @label.', $args),
       'id' => 'entity_reverse',
@@ -737,14 +737,14 @@ function core_field_views_data(FieldStorageConfigInterface $field_storage) {
       'field_name' => $field_name,
       'field table' => $table_mapping->getDedicatedDataTableName($field_storage),
       'field field' => $field_name . '_target_id',
-      'join_extra' => array(
-        array(
+      'join_extra' => [
+        [
           'field' => 'deleted',
           'value' => 0,
           'numeric' => TRUE,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   return $data;
diff --git a/core/modules/views/views.views_execution.inc b/core/modules/views/views.views_execution.inc
index 91dead539b83bcfa10971bd2a875423f1bb13e93..8b324a359bf045d5342fea73cd6efd83a8ff50a3 100644
--- a/core/modules/views/views.views_execution.inc
+++ b/core/modules/views/views.views_execution.inc
@@ -18,10 +18,10 @@
  *   \Drupal\views\Plugin\views\PluginBase::listLanguages().
  */
 function views_views_query_substitutions(ViewExecutable $view) {
-  $substitutions = array(
+  $substitutions = [
     '***CURRENT_VERSION***' => \Drupal::VERSION,
     '***CURRENT_TIME***' => REQUEST_TIME,
-  ) + PluginBase::queryLanguageSubstitutions();
+  ] + PluginBase::queryLanguageSubstitutions();
 
   return $substitutions;
 }
diff --git a/core/modules/views_ui/admin.inc b/core/modules/views_ui/admin.inc
index fd031d2427b9cbf05b2dca3c99cccffde46e9c37..a2d9fedcbc1c7cd1458586553bef8627fcb8c3e5 100644
--- a/core/modules/views_ui/admin.inc
+++ b/core/modules/views_ui/admin.inc
@@ -41,8 +41,8 @@
  *   array('dynamic_content', 'section') for this parameter.
  */
 function views_ui_add_ajax_trigger(&$wrapping_element, $trigger_key, $refresh_parents) {
-  $seen_ids = &drupal_static(__FUNCTION__ . ':seen_ids', array());
-  $seen_buttons = &drupal_static(__FUNCTION__ . ':seen_buttons', array());
+  $seen_ids = &drupal_static(__FUNCTION__ . ':seen_ids', []);
+  $seen_buttons = &drupal_static(__FUNCTION__ . ':seen_buttons', []);
 
   // Add the AJAX behavior to the triggering element.
   $triggering_element = &$wrapping_element[$trigger_key];
@@ -60,28 +60,28 @@ function views_ui_add_ajax_trigger(&$wrapping_element, $trigger_key, $refresh_pa
   // should be displayed next to the triggering element on the form.
   $button_key = $trigger_key . '_trigger_update';
   $element_info = \Drupal::service('element_info');
-  $wrapping_element[$button_key] = array(
+  $wrapping_element[$button_key] = [
     '#type' => 'submit',
     // Hide this button when JavaScript is enabled.
-    '#attributes' => array('class' => array('js-hide')),
-    '#submit' => array('views_ui_nojs_submit'),
+    '#attributes' => ['class' => ['js-hide']],
+    '#submit' => ['views_ui_nojs_submit'],
     // Add a process function to limit this button's validation errors to the
     // triggering element only. We have to do this in #process since until the
     // form API has added the #parents property to the triggering element for
     // us, we don't have any (easy) way to find out where its submitted values
     // will eventually appear in $form_state->getValues().
-    '#process' => array_merge(array('views_ui_add_limited_validation'), $element_info->getInfoProperty('submit', '#process', array())),
+    '#process' => array_merge(['views_ui_add_limited_validation'], $element_info->getInfoProperty('submit', '#process', [])),
     // Add an after-build function that inserts a wrapper around the region of
     // the form that needs to be refreshed by AJAX (so that the AJAX system can
     // detect and dynamically update it). This is done in #after_build because
     // it's a convenient place where we have automatic access to the complete
     // form array, but also to minimize the chance that the HTML we add will
     // get clobbered by code that runs after we have added it.
-    '#after_build' => array_merge($element_info->getInfoProperty('submit', '#after_build', array()), array('views_ui_add_ajax_wrapper')),
-  );
+    '#after_build' => array_merge($element_info->getInfoProperty('submit', '#after_build', []), ['views_ui_add_ajax_wrapper']),
+  ];
   // Copy #weight and #access from the triggering element to the button, so
   // that the two elements will be displayed together.
-  foreach (array('#weight', '#access') as $property) {
+  foreach (['#weight', '#access'] as $property) {
     if (isset($triggering_element[$property])) {
       $wrapping_element[$button_key][$property] = $triggering_element[$property];
     }
@@ -92,25 +92,25 @@ function views_ui_add_ajax_trigger(&$wrapping_element, $trigger_key, $refresh_pa
   // key and it may be a TranslatableMarkup.
   $button_title = !empty($triggering_element['#title']) ? (string) $triggering_element['#title'] : $trigger_key;
   if (empty($seen_buttons[$button_title])) {
-    $wrapping_element[$button_key]['#value'] = t('Update "@title" choice', array(
+    $wrapping_element[$button_key]['#value'] = t('Update "@title" choice', [
       '@title' => $button_title,
-    ));
+    ]);
     $seen_buttons[$button_title] = 1;
   }
   else {
-    $wrapping_element[$button_key]['#value'] = t('Update "@title" choice (@number)', array(
+    $wrapping_element[$button_key]['#value'] = t('Update "@title" choice (@number)', [
       '@title' => $button_title,
       '@number' => ++$seen_buttons[$button_title],
-    ));
+    ]);
   }
 
   // Attach custom data to the triggering element and submit button, so we can
   // use it in both the process function and AJAX callback.
-  $ajax_data = array(
+  $ajax_data = [
     'wrapper' => $triggering_element['#ajax']['wrapper'],
     'trigger_key' => $trigger_key,
     'refresh_parents' => $refresh_parents,
-  );
+  ];
   $seen_ids[$triggering_element['#ajax']['wrapper']] = TRUE;
   $triggering_element['#views_ui_ajax_data'] = $ajax_data;
   $wrapping_element[$button_key]['#views_ui_ajax_data'] = $ajax_data;
@@ -132,7 +132,7 @@ function views_ui_add_limited_validation($element, FormStateInterface $form_stat
   // Limit this button's validation to the AJAX triggering element, so it can
   // update the form for that change without requiring that the rest of the
   // form be filled out properly yet.
-  $element['#limit_validation_errors'] = array($ajax_triggering_element['#parents']);
+  $element['#limit_validation_errors'] = [$ajax_triggering_element['#parents']];
 
   // If we are in the process of a form submission and this is the button that
   // was clicked, the form API workflow in \Drupal::formBuilder()->doBuildForm()
@@ -165,10 +165,10 @@ function views_ui_add_ajax_wrapper($element, FormStateInterface $form_state) {
   // The HTML ID that AJAX expects was also stored in a property on the
   // element, so use that information to insert the wrapper <div> here.
   $id = $element['#views_ui_ajax_data']['wrapper'];
-  $refresh_element += array(
+  $refresh_element += [
     '#prefix' => '',
     '#suffix' => '',
-  );
+  ];
   $refresh_element['#prefix'] = '<div id="' . $id . '" class="views-ui-ajax-wrapper">' . $refresh_element['#prefix'];
   $refresh_element['#suffix'] .= '</div>';
 
@@ -213,16 +213,16 @@ function views_ui_standard_display_dropdown(&$form, FormStateInterface $form_sta
 
   // @todo Move this to a separate function if it's needed on any forms that
   // don't have the display dropdown.
-  $form['override'] = array(
+  $form['override'] = [
     '#prefix' => '<div class="views-override clearfix form--inline views-offset-top" data-drupal-views-offset="top">',
     '#suffix' => '</div>',
     '#weight' => -1000,
     '#tree' => TRUE,
-  );
+  ];
 
   // Add the "2 of 3" progress indicator.
   if ($form_progress = $view->getFormProgress()) {
-    $form['progress']['#markup'] = '<div id="views-progress-indicator" class="views-progress-indicator">' . t('@current of @total', array('@current' => $form_progress['current'], '@total' => $form_progress['total'])) . '</div>';
+    $form['progress']['#markup'] = '<div id="views-progress-indicator" class="views-progress-indicator">' . t('@current of @total', ['@current' => $form_progress['current'], '@total' => $form_progress['total']]) . '</div>';
     $form['progress']['#weight'] = -1001;
   }
 
@@ -247,17 +247,17 @@ function views_ui_standard_display_dropdown(&$form, FormStateInterface $form_sta
   }
 
   $display_dropdown['default'] = ($section_overrides ? t('All displays (except overridden)') : t('All displays'));
-  $display_dropdown[$display_id] = t('This @display_type (override)', array('@display_type' => $current_display->getPluginId()));
+  $display_dropdown[$display_id] = t('This @display_type (override)', ['@display_type' => $current_display->getPluginId()]);
   // Only display the revert option if we are in a overridden section.
   if (!$section_defaulted) {
     $display_dropdown['default_revert'] = t('Revert to default');
   }
 
-  $form['override']['dropdown'] = array(
+  $form['override']['dropdown'] = [
     '#type' => 'select',
     '#title' => t('For'), // @TODO: Translators may need more context than this.
     '#options' => $display_dropdown,
-  );
+  ];
   if ($current_display->isDefaulted($section)) {
     $form['override']['dropdown']['#default_value'] = 'defaults';
   }
diff --git a/core/modules/views_ui/src/Ajax/SetFormCommand.php b/core/modules/views_ui/src/Ajax/SetFormCommand.php
index ffafde6c6f9d4eeab9c6b8e96e9cdaca0da53a09..3910eb219829c335352606422a5d4fca6374bf11 100644
--- a/core/modules/views_ui/src/Ajax/SetFormCommand.php
+++ b/core/modules/views_ui/src/Ajax/SetFormCommand.php
@@ -32,10 +32,10 @@ public function __construct($url) {
    * {@inheritdoc}
    */
   public function render() {
-    return array(
+    return [
       'command' => 'viewsSetForm',
       'url' => $this->url,
-    );
+    ];
   }
 
 }
diff --git a/core/modules/views_ui/src/Controller/ViewsUIController.php b/core/modules/views_ui/src/Controller/ViewsUIController.php
index f36e912ad23a797dedda549b3118d00118bd8f40..97947620742d5966440aea31549d925e8b4c23da 100644
--- a/core/modules/views_ui/src/Controller/ViewsUIController.php
+++ b/core/modules/views_ui/src/Controller/ViewsUIController.php
@@ -58,7 +58,7 @@ public function reportFields() {
 
     // Fetch all fieldapi fields which are used in views
     // Therefore search in all views, displays and handler-types.
-    $fields = array();
+    $fields = [];
     $handler_types = ViewExecutable::getHandlerTypes();
     foreach ($views as $view) {
       $executable = $view->getExecutable();
@@ -81,12 +81,12 @@ public function reportFields() {
       }
     }
 
-    $header = array(t('Field name'), t('Used in'));
-    $rows = array();
+    $header = [t('Field name'), t('Used in')];
+    $rows = [];
     foreach ($fields as $field_name => $views) {
       $rows[$field_name]['data'][0]['data']['#plain_text'] = $field_name;
       foreach ($views as $view) {
-        $rows[$field_name]['data'][1][] = $this->l($view, new Url('entity.view.edit_form', array('view' => $view)));
+        $rows[$field_name]['data'][1][] = $this->l($view, new Url('entity.view.edit_form', ['view' => $view]));
       }
       $item_list = [
         '#theme' => 'item_list',
@@ -98,12 +98,12 @@ public function reportFields() {
 
     // Sort rows by field name.
     ksort($rows);
-    $output = array(
+    $output = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#empty' => t('No fields have been used in views yet.'),
-    );
+    ];
 
     return $output;
   }
@@ -120,7 +120,7 @@ public function reportPlugins() {
       $views = [];
       // Link each view name to the view itself.
       foreach ($row['views'] as $row_name => $view) {
-        $views[] = $this->l($view, new Url('entity.view.edit_form', array('view' => $view)));
+        $views[] = $this->l($view, new Url('entity.view.edit_form', ['view' => $view]));
       }
       unset($row['views']);
       $row['views']['data'] = [
@@ -132,12 +132,12 @@ public function reportPlugins() {
 
     // Sort rows by field name.
     ksort($rows);
-    return array(
+    return [
       '#type' => 'table',
-      '#header' => array(t('Type'), t('Name'), t('Provided by'), t('Used in')),
+      '#header' => [t('Type'), t('Name'), t('Provided by'), t('Used in')],
       '#rows' => $rows,
       '#empty' => t('There are no enabled views.'),
-    );
+    ];
   }
 
   /**
@@ -180,7 +180,7 @@ public function ajaxOperation(ViewEntityInterface $view, $op, Request $request)
    *   A JSON response containing the autocomplete suggestions for Views tags.
    */
   public function autocompleteTag(Request $request) {
-    $matches = array();
+    $matches = [];
     $string = $request->query->get('q');
     // Get matches from default views.
     $views = $this->entityManager()->getStorage('view')->loadMultiple();
@@ -223,8 +223,8 @@ public function edit(ViewUI $view, $display_id = NULL) {
     }
     $build['#title'] = $name;
 
-    $build['edit'] = $this->entityFormBuilder()->getForm($view, 'edit', array('display_id' => $display_id));
-    $build['preview'] = $this->entityFormBuilder()->getForm($view, 'preview', array('display_id' => $display_id));
+    $build['edit'] = $this->entityFormBuilder()->getForm($view, 'edit', ['display_id' => $display_id]);
+    $build['preview'] = $this->entityFormBuilder()->getForm($view, 'preview', ['display_id' => $display_id]);
     return $build;
   }
 
diff --git a/core/modules/views_ui/src/Form/AdvancedSettingsForm.php b/core/modules/views_ui/src/Form/AdvancedSettingsForm.php
index 88661a775a1a61776daa3c4d59cb48ed2fd4c933..36f34c26a1f4323bd17302fd2c76542c34cc343a 100644
--- a/core/modules/views_ui/src/Form/AdvancedSettingsForm.php
+++ b/core/modules/views_ui/src/Form/AdvancedSettingsForm.php
@@ -32,52 +32,52 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form = parent::buildForm($form, $form_state);
 
     $config = $this->config('views.settings');
-    $form['cache'] = array(
+    $form['cache'] = [
       '#type' => 'details',
       '#title' => $this->t('Caching'),
       '#open' => TRUE,
-    );
+    ];
 
-    $form['cache']['skip_cache'] = array(
+    $form['cache']['skip_cache'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Disable views data caching'),
       '#description' => $this->t("Views caches data about tables, modules and views available, to increase performance. By checking this box, Views will skip this cache and always rebuild this data when needed. This can have a serious performance impact on your site."),
       '#default_value' => $config->get('skip_cache'),
-    );
+    ];
 
-    $form['cache']['clear_cache'] = array(
+    $form['cache']['clear_cache'] = [
       '#type' => 'submit',
       '#value' => $this->t("Clear Views' cache"),
-      '#submit' => array('::cacheSubmit'),
-    );
+      '#submit' => ['::cacheSubmit'],
+    ];
 
-    $form['debug'] = array(
+    $form['debug'] = [
       '#type' => 'details',
       '#title' => $this->t('Debugging'),
       '#open' => TRUE,
-    );
+    ];
 
-    $form['debug']['sql_signature'] = array(
+    $form['debug']['sql_signature'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Add Views signature to all SQL queries'),
       '#description' => $this->t("All Views-generated queries will include the name of the views and display 'view-name:display-name' as a string at the end of the SELECT clause. This makes identifying Views queries in database server logs simpler, but should only be used when troubleshooting."),
 
       '#default_value' => $config->get('sql_signature'),
-    );
+    ];
 
     $options = Views::fetchPluginNames('display_extender');
     if (!empty($options)) {
-      $form['extenders'] = array(
+      $form['extenders'] = [
         '#type' => 'details',
         '#open' => TRUE,
-      );
-      $form['extenders']['display_extenders'] = array(
+      ];
+      $form['extenders']['display_extenders'] = [
         '#title' => $this->t('Display extenders'),
         '#default_value' => array_filter($config->get('display_extenders')),
         '#options' => $options,
         '#type' => 'checkboxes',
         '#description' => $this->t('Select extensions of the views interface.')
-      );
+      ];
     }
 
     return $form;
@@ -90,7 +90,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $this->config('views.settings')
       ->set('skip_cache', $form_state->getValue('skip_cache'))
       ->set('sql_signature', $form_state->getValue('sql_signature'))
-      ->set('display_extenders', $form_state->getValue('display_extenders', array()))
+      ->set('display_extenders', $form_state->getValue('display_extenders', []))
       ->save();
 
     parent::submitForm($form, $form_state);
diff --git a/core/modules/views_ui/src/Form/Ajax/AddHandler.php b/core/modules/views_ui/src/Form/Ajax/AddHandler.php
index ada0ccd347c741437d60550f76fc784485f27292..0a04000a6a164d443930f8625e62c92696bc11d0 100644
--- a/core/modules/views_ui/src/Form/Ajax/AddHandler.php
+++ b/core/modules/views_ui/src/Form/Ajax/AddHandler.php
@@ -49,16 +49,16 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $display_id = $form_state->get('display_id');
     $type = $form_state->get('type');
 
-    $form = array(
-      'options' => array(
-        '#theme_wrappers' => array('container'),
-        '#attributes' => array('class' => array('scroll'), 'data-drupal-views-scroll' => TRUE),
-      ),
-    );
+    $form = [
+      'options' => [
+        '#theme_wrappers' => ['container'],
+        '#attributes' => ['class' => ['scroll'], 'data-drupal-views-scroll' => TRUE],
+      ],
+    ];
 
     $executable = $view->getExecutable();
     if (!$executable->setDisplay($display_id)) {
-      $form['markup'] = array('#markup' => $this->t('Invalid display id @display', array('@display' => $display_id)));
+      $form['markup'] = ['#markup' => $this->t('Invalid display id @display', ['@display' => $display_id])];
       return $form;
     }
     $display = &$executable->displayHandlers->get($display_id);
@@ -71,7 +71,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       $type = $types[$type]['type'];
     }
 
-    $form['#title'] = $this->t('Add @type', array('@type' => $ltitle));
+    $form['#title'] = $this->t('Add @type', ['@type' => $ltitle]);
     $form['#section'] = $display_id . 'add-handler';
 
     // Add the display override dropdown.
@@ -82,36 +82,36 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $options = Views::viewsDataHelper()->fetchFields(array_keys($base_tables), $type, $display->useGroupBy(), $form_state->get('type'));
 
     if (!empty($options)) {
-      $form['override']['controls'] = array(
-        '#theme_wrappers' => array('container'),
+      $form['override']['controls'] = [
+        '#theme_wrappers' => ['container'],
         '#id' => 'views-filterable-options-controls',
         '#attributes' => ['class' => ['form--inline', 'views-filterable-options-controls']],
-      );
-      $form['override']['controls']['options_search'] = array(
+      ];
+      $form['override']['controls']['options_search'] = [
         '#type' => 'textfield',
         '#title' => $this->t('Search'),
-      );
+      ];
 
-      $groups = array('all' => $this->t('- All -'));
-      $form['override']['controls']['group'] = array(
+      $groups = ['all' => $this->t('- All -')];
+      $form['override']['controls']['group'] = [
         '#type' => 'select',
         '#title' => $this->t('Category'),
-        '#options' => array(),
-      );
+        '#options' => [],
+      ];
 
-      $form['options']['name'] = array(
+      $form['options']['name'] = [
         '#prefix' => '<div class="views-radio-box form-checkboxes views-filterable-options">',
         '#suffix' => '</div>',
         '#type' => 'tableselect',
-        '#header' => array(
+        '#header' => [
           'title' => $this->t('Title'),
           'group' => $this->t('Category'),
           'help' => $this->t('Description'),
-        ),
+        ],
         '#js_select' => FALSE,
-      );
+      ];
 
-      $grouped_options = array();
+      $grouped_options = [];
       foreach ($options as $key => $option) {
         $group = preg_replace('/[^a-z0-9]/', '-', strtolower($option['group']));
         $groups[$group] = $option['group'];
@@ -136,50 +136,50 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
       foreach ($grouped_options as $group => $group_options) {
         foreach ($group_options as $key => $option) {
-          $form['options']['name']['#options'][$key] = array(
-            '#attributes' => array(
-              'class' => array('filterable-option', $group),
-            ),
-            'title' => array(
-              'data' => array(
+          $form['options']['name']['#options'][$key] = [
+            '#attributes' => [
+              'class' => ['filterable-option', $group],
+            ],
+            'title' => [
+              'data' => [
                 '#title' => $option['title'],
                 '#plain_text' => $option['title'],
-              ),
-              'class' => array('title'),
-            ),
+              ],
+              'class' => ['title'],
+            ],
             'group' => $option['group'],
-            'help' => array(
+            'help' => [
               'data' => $option['help'],
-              'class' => array('description'),
-            ),
-          );
+              'class' => ['description'],
+            ],
+          ];
         }
       }
 
       $form['override']['controls']['group']['#options'] = $groups;
     }
     else {
-      $form['options']['markup'] = array(
-        '#markup' => '<div class="js-form-item form-item">' . $this->t('There are no @types available to add.', array('@types' => $ltitle)) . '</div>',
-      );
+      $form['options']['markup'] = [
+        '#markup' => '<div class="js-form-item form-item">' . $this->t('There are no @types available to add.', ['@types' => $ltitle]) . '</div>',
+      ];
     }
     // Add a div to show the selected items
-    $form['selected'] = array(
+    $form['selected'] = [
       '#type' => 'item',
       '#markup' => '<span class="views-ui-view-title">' . $this->t('Selected:') . '</span> ' . '<div class="views-selected-options"></div>',
-      '#theme_wrappers' => array('form_element', 'views_ui_container'),
-      '#attributes' => array(
-        'class' => array('container-inline', 'views-add-form-selected', 'views-offset-bottom'),
+      '#theme_wrappers' => ['form_element', 'views_ui_container'],
+      '#attributes' => [
+        'class' => ['container-inline', 'views-add-form-selected', 'views-offset-bottom'],
         'data-drupal-views-offset' => 'bottom',
-      ),
-    );
-    $view->getStandardButtons($form, $form_state, 'views_ui_add_handler_form', $this->t('Add and configure @types', array('@types' => $ltitle)));
+      ],
+    ];
+    $view->getStandardButtons($form, $form_state, 'views_ui_add_handler_form', $this->t('Add and configure @types', ['@types' => $ltitle]));
 
     // Remove the default submit function.
     $form['actions']['submit']['#submit'] = array_filter($form['actions']['submit']['#submit'], function($var) {
       return !(is_array($var) && isset($var[1]) && $var[1] == 'standardSubmit');
     });
-    $form['actions']['submit']['#submit'][] = array($view, 'submitItemAdd');
+    $form['actions']['submit']['#submit'][] = [$view, 'submitItemAdd'];
 
     return $form;
   }
diff --git a/core/modules/views_ui/src/Form/Ajax/Analyze.php b/core/modules/views_ui/src/Form/Ajax/Analyze.php
index 458575d37cbe0528f94c516479ad328ba1715374..52784d3d3c5443aece69e457d7762a42506ff582 100644
--- a/core/modules/views_ui/src/Form/Ajax/Analyze.php
+++ b/core/modules/views_ui/src/Form/Ajax/Analyze.php
@@ -36,11 +36,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $analyzer = Views::analyzer();
     $messages = $analyzer->getMessages($view->getExecutable());
 
-    $form['analysis'] = array(
+    $form['analysis'] = [
       '#prefix' => '<div class="js-form-item form-item">',
       '#suffix' => '</div>',
       '#markup' => $analyzer->formatMessages($messages),
-    );
+    ];
 
     // Inform the standard button function that we want an OK button.
     $form_state->set('ok_button', TRUE);
diff --git a/core/modules/views_ui/src/Form/Ajax/ConfigHandler.php b/core/modules/views_ui/src/Form/Ajax/ConfigHandler.php
index 819cb755b39bd746a838ebb3b6438c4a01067530..972b4b940fd7966e851509683126458ee9c1730f 100644
--- a/core/modules/views_ui/src/Form/Ajax/ConfigHandler.php
+++ b/core/modules/views_ui/src/Form/Ajax/ConfigHandler.php
@@ -54,17 +54,17 @@ public function buildForm(array $form, FormStateInterface $form_state, Request $
     $type = $form_state->get('type');
     $id = $form_state->get('id');
 
-    $form = array(
-      'options' => array(
+    $form = [
+      'options' => [
         '#tree' => TRUE,
-        '#theme_wrappers' => array('container'),
-        '#attributes' => array('class' => array('scroll'), 'data-drupal-views-scroll' => TRUE),
-      ),
-    );
+        '#theme_wrappers' => ['container'],
+        '#attributes' => ['class' => ['scroll'], 'data-drupal-views-scroll' => TRUE],
+      ],
+    ];
     $executable = $view->getExecutable();
     $save_ui_cache = FALSE;
     if (!$executable->setDisplay($display_id)) {
-      $form['markup'] = array('#markup' => $this->t('Invalid display id @display', array('@display' => $display_id)));
+      $form['markup'] = ['#markup' => $this->t('Invalid display id @display', ['@display' => $display_id])];
       return $form;
     }
     $item = $executable->getHandler($display_id, $type, $id);
@@ -72,7 +72,7 @@ public function buildForm(array $form, FormStateInterface $form_state, Request $
     if ($item) {
       $handler = $executable->display_handler->getHandler($type, $id);
       if (empty($handler)) {
-        $form['markup'] = array('#markup' => $this->t("Error: handler for @table > @field doesn't exist!", array('@table' => $item['table'], '@field' => $item['field'])));
+        $form['markup'] = ['#markup' => $this->t("Error: handler for @table > @field doesn't exist!", ['@table' => $item['table'], '@field' => $item['field']])];
       }
       else {
         $types = ViewExecutable::getHandlerTypes();
@@ -88,7 +88,7 @@ public function buildForm(array $form, FormStateInterface $form_state, Request $
         // A whole bunch of code to figure out what relationships are valid for
         // this item.
         $relationships = $executable->display_handler->getOption('relationships');
-        $relationship_options = array();
+        $relationship_options = [];
 
         foreach ($relationships as $relationship) {
           // relationships can't link back to self. But also, due to ordering,
@@ -118,7 +118,7 @@ public function buildForm(array $form, FormStateInterface $form_state, Request $
           // it to none.
           $base_fields = Views::viewsDataHelper()->fetchFields($view->get('base_table'), $type, $executable->display_handler->useGroupBy());
           if (isset($base_fields[$item['table'] . '.' . $item['field']])) {
-            $relationship_options = array_merge(array('none' => $this->t('Do not use a relationship')), $relationship_options);
+            $relationship_options = array_merge(['none' => $this->t('Do not use a relationship')], $relationship_options);
           }
           $rel = empty($item['relationship']) ? 'none' : $item['relationship'];
           if (empty($relationship_options[$rel])) {
@@ -133,30 +133,30 @@ public function buildForm(array $form, FormStateInterface $form_state, Request $
             $handler->init($executable, $executable->display_handler, $item);
           }
 
-          $form['options']['relationship'] = array(
+          $form['options']['relationship'] = [
             '#type' => 'select',
             '#title' => $this->t('Relationship'),
             '#options' => $relationship_options,
             '#default_value' => $rel,
             '#weight' => -500,
-          );
+          ];
         }
         else {
-          $form['options']['relationship'] = array(
+          $form['options']['relationship'] = [
             '#type' => 'value',
             '#value' => 'none',
-          );
+          ];
         }
 
-        $form['#title'] = $this->t('Configure @type: @item', array('@type' => $types[$type]['lstitle'], '@item' => $handler->adminLabel()));
+        $form['#title'] = $this->t('Configure @type: @item', ['@type' => $types[$type]['lstitle'], '@item' => $handler->adminLabel()]);
 
         if (!empty($handler->definition['help'])) {
-          $form['options']['form_description'] = array(
+          $form['options']['form_description'] = [
             '#markup' => $handler->definition['help'],
-            '#theme_wrappers' => array('container'),
-            '#attributes' => array('class' => array('js-form-item form-item description')),
+            '#theme_wrappers' => ['container'],
+            '#attributes' => ['class' => ['js-form-item form-item description']],
             '#weight' => -1000,
-          );
+          ];
         }
 
         $form['#section'] = $display_id . '-' . $type . '-' . $id;
@@ -170,13 +170,13 @@ public function buildForm(array $form, FormStateInterface $form_state, Request $
 
       $view->getStandardButtons($form, $form_state, 'views_ui_config_item_form', $name);
       // Add a 'remove' button.
-      $form['actions']['remove'] = array(
+      $form['actions']['remove'] = [
         '#type' => 'submit',
         '#value' => $this->t('Remove'),
-        '#submit' => array(array($this, 'remove')),
-        '#limit_validation_errors' => array(array('override')),
+        '#submit' => [[$this, 'remove']],
+        '#limit_validation_errors' => [['override']],
         '#button_type' => 'danger',
-      );
+      ];
     }
 
     if ($save_ui_cache) {
diff --git a/core/modules/views_ui/src/Form/Ajax/ConfigHandlerExtra.php b/core/modules/views_ui/src/Form/Ajax/ConfigHandlerExtra.php
index 0c10fb1faf96c5c0c0452a4b9bd102e00106c62a..a79d03142ebdaf1a4bee7f61efd55e20b1464ddf 100644
--- a/core/modules/views_ui/src/Form/Ajax/ConfigHandlerExtra.php
+++ b/core/modules/views_ui/src/Form/Ajax/ConfigHandlerExtra.php
@@ -51,16 +51,16 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $type = $form_state->get('type');
     $id = $form_state->get('id');
 
-    $form = array(
-      'options' => array(
+    $form = [
+      'options' => [
         '#tree' => TRUE,
-        '#theme_wrappers' => array('container'),
-        '#attributes' => array('class' => array('scroll'), 'data-drupal-views-scroll' => TRUE),
-      ),
-    );
+        '#theme_wrappers' => ['container'],
+        '#attributes' => ['class' => ['scroll'], 'data-drupal-views-scroll' => TRUE],
+      ],
+    ];
     $executable = $view->getExecutable();
     if (!$executable->setDisplay($display_id)) {
-      $form['markup'] = array('#markup' => $this->t('Invalid display id @display', array('@display' => $display_id)));
+      $form['markup'] = ['#markup' => $this->t('Invalid display id @display', ['@display' => $display_id])];
       return $form;
     }
     $item = $executable->getHandler($display_id, $type, $id);
@@ -68,13 +68,13 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     if ($item) {
       $handler = $executable->display_handler->getHandler($type, $id);
       if (empty($handler)) {
-        $form['markup'] = array('#markup' => $this->t("Error: handler for @table > @field doesn't exist!", array('@table' => $item['table'], '@field' => $item['field'])));
+        $form['markup'] = ['#markup' => $this->t("Error: handler for @table > @field doesn't exist!", ['@table' => $item['table'], '@field' => $item['field']])];
       }
       else {
         $handler->init($executable, $executable->display_handler, $item);
         $types = ViewExecutable::getHandlerTypes();
 
-        $form['#title'] = $this->t('Configure extra settings for @type %item', array('@type' => $types[$type]['lstitle'], '%item' => $handler->adminLabel()));
+        $form['#title'] = $this->t('Configure extra settings for @type %item', ['@type' => $types[$type]['lstitle'], '%item' => $handler->adminLabel()]);
 
         $form['#section'] = $display_id . '-' . $type . '-' . $id;
 
diff --git a/core/modules/views_ui/src/Form/Ajax/ConfigHandlerGroup.php b/core/modules/views_ui/src/Form/Ajax/ConfigHandlerGroup.php
index e7c7a83933409f3c2ca4e86515f95931ffd9a3b9..b4d0f136b8828d8e752705cf1fa119dd3ef14286 100644
--- a/core/modules/views_ui/src/Form/Ajax/ConfigHandlerGroup.php
+++ b/core/modules/views_ui/src/Form/Ajax/ConfigHandlerGroup.php
@@ -52,16 +52,16 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $type = $form_state->get('type');
     $id = $form_state->get('id');
 
-    $form = array(
-      'options' => array(
+    $form = [
+      'options' => [
         '#tree' => TRUE,
-        '#theme_wrappers' => array('container'),
-        '#attributes' => array('class' => array('scroll'), 'data-drupal-views-scroll' => TRUE),
-      ),
-    );
+        '#theme_wrappers' => ['container'],
+        '#attributes' => ['class' => ['scroll'], 'data-drupal-views-scroll' => TRUE],
+      ],
+    ];
     $executable = $view->getExecutable();
     if (!$executable->setDisplay($display_id)) {
-      $form['markup'] = array('#markup' => $this->t('Invalid display id @display', array('@display' => $display_id)));
+      $form['markup'] = ['#markup' => $this->t('Invalid display id @display', ['@display' => $display_id])];
       return $form;
     }
 
@@ -72,13 +72,13 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     if ($item) {
       $handler = $executable->display_handler->getHandler($type, $id);
       if (empty($handler)) {
-        $form['markup'] = array('#markup' => $this->t("Error: handler for @table > @field doesn't exist!", array('@table' => $item['table'], '@field' => $item['field'])));
+        $form['markup'] = ['#markup' => $this->t("Error: handler for @table > @field doesn't exist!", ['@table' => $item['table'], '@field' => $item['field']])];
       }
       else {
         $handler->init($executable, $executable->display_handler, $item);
         $types = ViewExecutable::getHandlerTypes();
 
-        $form['#title'] = $this->t('Configure aggregation settings for @type %item', array('@type' => $types[$type]['lstitle'], '%item' => $handler->adminLabel()));
+        $form['#title'] = $this->t('Configure aggregation settings for @type %item', ['@type' => $types[$type]['lstitle'], '%item' => $handler->adminLabel()]);
 
         $handler->buildGroupByForm($form['options'], $form_state);
         $form_state->set('handler', $handler);
diff --git a/core/modules/views_ui/src/Form/Ajax/Display.php b/core/modules/views_ui/src/Form/Ajax/Display.php
index bd129af1e893a30cc034399371a20df5f5539f6b..302d75959eb221f85ddab8c2627d4d2822fb0559 100644
--- a/core/modules/views_ui/src/Form/Ajax/Display.php
+++ b/core/modules/views_ui/src/Form/Ajax/Display.php
@@ -60,15 +60,15 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     $executable = $view->getExecutable();
     if (!$executable->setDisplay($display_id)) {
-      $form['markup'] = array('#markup' => $this->t('Invalid display id @display', array('@display' => $display_id)));
+      $form['markup'] = ['#markup' => $this->t('Invalid display id @display', ['@display' => $display_id])];
       return $form;
     }
 
     // Get form from the handler.
-    $form['options'] = array(
-      '#theme_wrappers' => array('container'),
-      '#attributes' => array('class' => array('scroll'), 'data-drupal-views-scroll' => TRUE),
-    );
+    $form['options'] = [
+      '#theme_wrappers' => ['container'],
+      '#attributes' => ['class' => ['scroll'], 'data-drupal-views-scroll' => TRUE],
+    ];
     $executable->display_handler->buildOptionsForm($form['options'], $form_state);
 
     // The handler options form sets $form['#title'], which we need on the entire
diff --git a/core/modules/views_ui/src/Form/Ajax/EditDetails.php b/core/modules/views_ui/src/Form/Ajax/EditDetails.php
index ced404426ee8f9aeff7c959dfd4c70ffc15c8204..07b1625a8d41168e9d00b72a666c6fabe812243c 100644
--- a/core/modules/views_ui/src/Form/Ajax/EditDetails.php
+++ b/core/modules/views_ui/src/Form/Ajax/EditDetails.php
@@ -33,33 +33,33 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['#title'] = $this->t('Name and description');
     $form['#section'] = 'details';
 
-    $form['details'] = array(
-      '#theme_wrappers' => array('container'),
-      '#attributes' => array('class' => array('scroll'), 'data-drupal-views-scroll' => TRUE),
-    );
-    $form['details']['label'] = array(
+    $form['details'] = [
+      '#theme_wrappers' => ['container'],
+      '#attributes' => ['class' => ['scroll'], 'data-drupal-views-scroll' => TRUE],
+    ];
+    $form['details']['label'] = [
       '#type' => 'textfield',
       '#title' => t('Administrative name'),
       '#default_value' => $view->label(),
-    );
-    $form['details']['langcode'] = array(
+    ];
+    $form['details']['langcode'] = [
       '#type' => 'language_select',
       '#title' => $this->t('View language'),
       '#description' => $this->t('Language of labels and other textual elements in this view.'),
       '#default_value' => $view->get('langcode'),
-    );
-    $form['details']['description'] = array(
+    ];
+    $form['details']['description'] = [
        '#type' => 'textfield',
        '#title' => t('Administrative description'),
        '#default_value' => $view->get('description'),
-     );
-    $form['details']['tag'] = array(
+     ];
+    $form['details']['tag'] = [
       '#type' => 'textfield',
       '#title' => t('Administrative tags'),
       '#description' => t('Enter a comma-separated list of words to describe your view.'),
       '#default_value' => $view->get('tag'),
       '#autocomplete_route_name' => 'views_ui.autocomplete',
-    );
+    ];
 
     $view->getStandardButtons($form, $form_state, 'views_ui_edit_details_form');
     return $form;
diff --git a/core/modules/views_ui/src/Form/Ajax/Rearrange.php b/core/modules/views_ui/src/Form/Ajax/Rearrange.php
index 048776950139cc2fef984f787414280cb2604622..2a46120c603a241f83dc346148e7cf62ed79979d 100644
--- a/core/modules/views_ui/src/Form/Ajax/Rearrange.php
+++ b/core/modules/views_ui/src/Form/Ajax/Rearrange.php
@@ -53,11 +53,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $types = ViewExecutable::getHandlerTypes();
     $executable = $view->getExecutable();
     if (!$executable->setDisplay($display_id)) {
-      $form['markup'] = array('#markup' => $this->t('Invalid display id @display', array('@display' => $display_id)));
+      $form['markup'] = ['#markup' => $this->t('Invalid display id @display', ['@display' => $display_id])];
       return $form;
     }
     $display = &$executable->displayHandlers->get($display_id);
-    $form['#title'] = $this->t('Rearrange @type', array('@type' => $types[$type]['ltitle']));
+    $form['#title'] = $this->t('Rearrange @type', ['@type' => $types[$type]['ltitle']]);
     $form['#section'] = $display_id . 'rearrange-item';
 
     if ($display->defaultableSections($types[$type]['plural'])) {
@@ -69,31 +69,31 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $count = 0;
 
     // Get relationship labels
-    $relationships = array();
+    $relationships = [];
     foreach ($display->getHandlers('relationship') as $id => $handler) {
       $relationships[$id] = $handler->adminLabel();
     }
 
-    $form['fields'] = array(
+    $form['fields'] = [
       '#type' => 'table',
-      '#header' => array('', $this->t('Weight'), $this->t('Remove')),
+      '#header' => ['', $this->t('Weight'), $this->t('Remove')],
       '#empty' => $this->t('No fields available.'),
-      '#tabledrag' => array(
-        array(
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'weight',
-        )
-      ),
+        ]
+      ],
       '#tree' => TRUE,
       '#prefix' => '<div class="scroll" data-drupal-views-scroll>',
       '#suffix' => '</div>',
-    );
+    ];
 
     foreach ($display->getOption($types[$type]['plural']) as $id => $field) {
-      $form['fields'][$id] = array();
+      $form['fields'][$id] = [];
 
-      $form['fields'][$id]['#attributes'] = array('class' => array('draggable'), 'id' => 'views-row-' . $id);
+      $form['fields'][$id]['#attributes'] = ['class' => ['draggable'], 'id' => 'views-row-' . $id];
 
       $handler = $display->getHandler($type, $id);
       if ($handler) {
@@ -105,34 +105,34 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       }
       else {
         $name = $id;
-        $markup = $this->t('Broken field @id', array('@id' => $id));
+        $markup = $this->t('Broken field @id', ['@id' => $id]);
       }
-      $form['fields'][$id]['name'] = array('#markup' => $markup);
+      $form['fields'][$id]['name'] = ['#markup' => $markup];
 
-      $form['fields'][$id]['weight'] = array(
+      $form['fields'][$id]['weight'] = [
         '#type' => 'textfield',
         '#default_value' => ++$count,
-        '#attributes' => array('class' => array('weight')),
-        '#title' => t('Weight for @title', array('@title' => $name)),
+        '#attributes' => ['class' => ['weight']],
+        '#title' => t('Weight for @title', ['@title' => $name]),
         '#title_display' => 'invisible',
-      );
+      ];
 
-      $form['fields'][$id]['removed'] = array(
+      $form['fields'][$id]['removed'] = [
         '#type' => 'checkbox',
-        '#title' => t('Remove @title', array('@title' => $name)),
+        '#title' => t('Remove @title', ['@title' => $name]),
         '#title_display' => 'invisible',
         '#id' => 'views-removed-' . $id,
-        '#attributes' => array('class' => array('views-remove-checkbox')),
+        '#attributes' => ['class' => ['views-remove-checkbox']],
         '#default_value' => 0,
-        '#suffix' => \Drupal::l(SafeMarkup::format('<span>@text</span>', array('@text' => $this->t('Remove'))),
-          Url::fromRoute('<none>', array(), array('attributes' => array(
+        '#suffix' => \Drupal::l(SafeMarkup::format('<span>@text</span>', ['@text' => $this->t('Remove')]),
+          Url::fromRoute('<none>', [], ['attributes' => [
             'id' => 'views-remove-link-' . $id,
-            'class' => array('views-hidden', 'views-button-remove', 'views-remove-link'),
+            'class' => ['views-hidden', 'views-button-remove', 'views-remove-link'],
             'alt' => $this->t('Remove this item'),
-            'title' => $this->t('Remove this item')),
-          ))
+            'title' => $this->t('Remove this item')],
+          ])
         ),
-      );
+      ];
     }
 
     $view->getStandardButtons($form, $form_state, 'views_ui_rearrange_form');
@@ -152,7 +152,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $display = &$view->getExecutable()->displayHandlers->get($display_id);
 
     $old_fields = $display->getOption($types[$type]['plural']);
-    $new_fields = $order = array();
+    $new_fields = $order = [];
 
     // Make an array with the weights
     foreach ($form_state->getValue('fields') as $field => $info) {
diff --git a/core/modules/views_ui/src/Form/Ajax/RearrangeFilter.php b/core/modules/views_ui/src/Form/Ajax/RearrangeFilter.php
index ea2235b7bb75dcb1c04b31624c9ab7314d36ca01..32986810512d3cbc7b6a39e95c312b20df688748 100644
--- a/core/modules/views_ui/src/Form/Ajax/RearrangeFilter.php
+++ b/core/modules/views_ui/src/Form/Ajax/RearrangeFilter.php
@@ -43,12 +43,12 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $types = ViewExecutable::getHandlerTypes();
     $executable = $view->getExecutable();
     if (!$executable->setDisplay($display_id)) {
-      $form['markup'] = array('#markup' => $this->t('Invalid display id @display', array('@display' => $display_id)));
+      $form['markup'] = ['#markup' => $this->t('Invalid display id @display', ['@display' => $display_id])];
       return $form;
     }
     $display = $executable->displayHandlers->get($display_id);
     $form['#title'] = Html::escape($display->display['display_title']) . ': ';
-    $form['#title'] .= $this->t('Rearrange @type', array('@type' => $types[$type]['ltitle']));
+    $form['#title'] .= $this->t('Rearrange @type', ['@type' => $types[$type]['ltitle']]);
     $form['#section'] = $display_id . 'rearrange-item';
 
     if ($display->defaultableSections($types[$type]['plural'])) {
@@ -68,12 +68,12 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $count = 0;
 
     // Get relationship labels
-    $relationships = array();
+    $relationships = [];
     foreach ($display->getHandlers('relationship') as $id => $handler) {
       $relationships[$id] = $handler->adminLabel();
     }
 
-    $group_options = array();
+    $group_options = [];
 
     /**
      * Filter groups is an array that contains:
@@ -88,59 +88,59 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $grouping = count(array_keys($groups['groups'])) > 1;
 
     $form['filter_groups']['#tree'] = TRUE;
-    $form['filter_groups']['operator'] = array(
+    $form['filter_groups']['operator'] = [
       '#type' => 'select',
-      '#options' => array(
+      '#options' => [
         'AND' => $this->t('And'),
         'OR' => $this->t('Or'),
-      ),
+      ],
       '#default_value' => $groups['operator'],
-      '#attributes' => array(
-        'class' => array('warning-on-change'),
-      ),
+      '#attributes' => [
+        'class' => ['warning-on-change'],
+      ],
       '#title' => $this->t('Operator to use on all groups'),
       '#description' => $this->t('Either "group 0 AND group 1 AND group 2" or "group 0 OR group 1 OR group 2", etc'),
       '#access' => $grouping,
-    );
+    ];
 
     $form['remove_groups']['#tree'] = TRUE;
 
     foreach ($groups['groups'] as $id => $group) {
-      $form['filter_groups']['groups'][$id] = array(
+      $form['filter_groups']['groups'][$id] = [
         '#title' => $this->t('Operator'),
         '#type' => 'select',
-        '#options' => array(
+        '#options' => [
           'AND' => $this->t('And'),
           'OR' => $this->t('Or'),
-        ),
+        ],
         '#default_value' => $group,
-        '#attributes' => array(
-          'class' => array('warning-on-change'),
-        ),
-      );
+        '#attributes' => [
+          'class' => ['warning-on-change'],
+        ],
+      ];
 
-      $form['remove_groups'][$id] = array(); // to prevent a notice
+      $form['remove_groups'][$id] = []; // to prevent a notice
       if ($id != 1) {
-        $form['remove_groups'][$id] = array(
+        $form['remove_groups'][$id] = [
           '#type' => 'submit',
-          '#value' => $this->t('Remove group @group', array('@group' => $id)),
+          '#value' => $this->t('Remove group @group', ['@group' => $id]),
           '#id' => "views-remove-group-$id",
-          '#attributes' => array(
-            'class' => array('views-remove-group'),
-          ),
+          '#attributes' => [
+            'class' => ['views-remove-group'],
+          ],
           '#group' => $id,
           '#ajax' => ['url' => NULL],
-        );
+        ];
       }
-      $group_options[$id] = $id == 1 ? $this->t('Default group') : $this->t('Group @group', array('@group' => $id));
-      $form['#group_renders'][$id] = array();
+      $group_options[$id] = $id == 1 ? $this->t('Default group') : $this->t('Group @group', ['@group' => $id]);
+      $form['#group_renders'][$id] = [];
     }
 
     $form['#group_options'] = $group_options;
     $form['#groups'] = $groups;
     // We don't use getHandlers() because we want items without handlers to
     // appear and show up as 'broken' so that the user can see them.
-    $form['filters'] = array('#tree' => TRUE);
+    $form['filters'] = ['#tree' => TRUE];
     foreach ($handlers as $id => $field) {
       // If the group does not exist, move the filters to the default group.
       if (empty($field['group']) || empty($groups['groups'][$field['group']])) {
@@ -162,24 +162,24 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       // Place this item into the proper group for rendering.
       $form['#group_renders'][$field['group']][] = $id;
 
-      $form['filters'][$id]['weight'] = array(
-        '#title' => t('Weight for @id', array('@id' => $id)),
+      $form['filters'][$id]['weight'] = [
+        '#title' => t('Weight for @id', ['@id' => $id]),
         '#title_display' => 'invisible',
         '#type' => 'textfield',
         '#default_value' => ++$count,
         '#size' => 8,
-      );
-      $form['filters'][$id]['group'] = array(
-        '#title' => t('Group for @id', array('@id' => $id)),
+      ];
+      $form['filters'][$id]['group'] = [
+        '#title' => t('Group for @id', ['@id' => $id]),
         '#title_display' => 'invisible',
         '#type' => 'select',
         '#options' => $group_options,
         '#default_value' => $field['group'],
-        '#attributes' => array(
-          'class' => array('views-region-select', 'views-region-' . $id),
-        ),
+        '#attributes' => [
+          'class' => ['views-region-select', 'views-region-' . $id],
+        ],
         '#access' => $field['group'] !== 'ungroupable',
-      );
+      ];
 
       if ($handler) {
         $name = $handler->adminLabel() . ' ' . $handler->adminSummary();
@@ -187,34 +187,34 @@ public function buildForm(array $form, FormStateInterface $form_state) {
           $name = '(' . $relationships[$field['relationship']] . ') ' . $name;
         }
 
-        $form['filters'][$id]['name'] = array(
+        $form['filters'][$id]['name'] = [
           '#markup' => $name,
-        );
+        ];
       }
       else {
-        $form['filters'][$id]['name'] = array('#markup' => $this->t('Broken field @id', array('@id' => $id)));
+        $form['filters'][$id]['name'] = ['#markup' => $this->t('Broken field @id', ['@id' => $id])];
       }
-      $form['filters'][$id]['removed'] = array(
-        '#title' => t('Remove @id', array('@id' => $id)),
+      $form['filters'][$id]['removed'] = [
+        '#title' => t('Remove @id', ['@id' => $id]),
         '#title_display' => 'invisible',
         '#type' => 'checkbox',
         '#id' => 'views-removed-' . $id,
-        '#attributes' => array('class' => array('views-remove-checkbox')),
+        '#attributes' => ['class' => ['views-remove-checkbox']],
         '#default_value' => 0,
-      );
+      ];
     }
 
     $view->getStandardButtons($form, $form_state, 'views_ui_rearrange_filter_form');
-    $form['actions']['add_group'] = array(
+    $form['actions']['add_group'] = [
       '#type' => 'submit',
       '#value' => $this->t('Create new filter group'),
       '#id' => 'views-add-group',
       '#group' => 'add',
-      '#attributes' => array(
-        'class' => array('views-add-group'),
-      ),
+      '#attributes' => [
+        'class' => ['views-add-group'],
+      ],
       '#ajax' => ['url' => NULL],
-    );
+    ];
 
     return $form;
   }
@@ -226,7 +226,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $types = ViewExecutable::getHandlerTypes();
     $view = $form_state->get('view');
     $display = &$view->getExecutable()->displayHandlers->get($form_state->get('display_id'));
-    $remember_groups = array();
+    $remember_groups = [];
 
     if (!empty($view->form_cache)) {
       $old_fields = $view->form_cache['handlers'];
@@ -237,7 +237,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
     $groups = $form_state->getValue('filter_groups');
     // Whatever button was clicked, re-calculate field information.
-    $new_fields = $order = array();
+    $new_fields = $order = [];
 
     // Make an array with the weights
     foreach ($form_state->getValue('filters') as $field => $info) {
diff --git a/core/modules/views_ui/src/Form/Ajax/ReorderDisplays.php b/core/modules/views_ui/src/Form/Ajax/ReorderDisplays.php
index 7d1285f80da938faf7b1012b152c3e0457db01d8..377a3d55c236ab5ea82b21713e5c1ade4468ae69 100644
--- a/core/modules/views_ui/src/Form/Ajax/ReorderDisplays.php
+++ b/core/modules/views_ui/src/Form/Ajax/ReorderDisplays.php
@@ -40,10 +40,10 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       'view' => $view->id(),
       'display_id' => $display_id,
     ]);
-    $form['view'] = array(
+    $form['view'] = [
       '#type' => 'value',
       '#value' => $view
-    );
+    ];
 
     $displays = $view->get('display');
     $count = count($displays);
@@ -56,82 +56,82 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       return 0;
     });
 
-    $form['displays'] = array(
+    $form['displays'] = [
       '#type' => 'table',
       '#id' => 'reorder-displays',
-      '#header' => array($this->t('Display'), $this->t('Weight'), $this->t('Remove')),
+      '#header' => [$this->t('Display'), $this->t('Weight'), $this->t('Remove')],
       '#empty' => $this->t('No displays available.'),
-      '#tabledrag' => array(
-        array(
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'weight',
-        )
-      ),
+        ]
+      ],
       '#tree' => TRUE,
       '#prefix' => '<div class="scroll" data-drupal-views-scroll>',
       '#suffix' => '</div>',
-    );
+    ];
 
     foreach ($displays as $id => $display) {
-      $form['displays'][$id] = array(
+      $form['displays'][$id] = [
         '#display' => $display,
-        '#attributes' => array(
+        '#attributes' => [
           'id' => 'display-row-' . $id,
-        ),
+        ],
         '#weight' => $display['position'],
-      );
+      ];
 
       // Only make row draggable if it's not the default display.
       if ($id !== 'default') {
         $form['displays'][$id]['#attributes']['class'][] = 'draggable';
       }
 
-      $form['displays'][$id]['title'] = array(
+      $form['displays'][$id]['title'] = [
         '#markup' => $display['display_title'],
-      );
+      ];
 
-      $form['displays'][$id]['weight'] = array(
+      $form['displays'][$id]['weight'] = [
         '#type' => 'weight',
         '#value' => $display['position'],
         '#delta' => $count,
-        '#title' => $this->t('Weight for @display', array('@display' => $display['display_title'])),
+        '#title' => $this->t('Weight for @display', ['@display' => $display['display_title']]),
         '#title_display' => 'invisible',
-        '#attributes' => array(
-          'class' => array('weight'),
-        ),
-      );
-
-      $form['displays'][$id]['removed'] = array(
-        'checkbox' => array(
-          '#title' => t('Remove @id', array('@id' => $id)),
+        '#attributes' => [
+          'class' => ['weight'],
+        ],
+      ];
+
+      $form['displays'][$id]['removed'] = [
+        'checkbox' => [
+          '#title' => t('Remove @id', ['@id' => $id]),
           '#title_display' => 'invisible',
           '#type' => 'checkbox',
           '#id' => 'display-removed-' . $id,
-          '#attributes' => array(
-            'class' => array('views-remove-checkbox'),
-          ),
+          '#attributes' => [
+            'class' => ['views-remove-checkbox'],
+          ],
           '#default_value' => !empty($display['deleted']),
-        ),
-        'link' => array(
+        ],
+        'link' => [
           '#type' => 'link',
-          '#title' => SafeMarkup::format('<span>@text</span>', array('@text' => $this->t('Remove'))),
+          '#title' => SafeMarkup::format('<span>@text</span>', ['@text' => $this->t('Remove')]),
           '#url' => Url::fromRoute('<none>'),
-          '#attributes' => array(
+          '#attributes' => [
             'id' => 'display-remove-link-' . $id,
-            'class' => array('views-button-remove', 'display-remove-link'),
+            'class' => ['views-button-remove', 'display-remove-link'],
             'alt' => $this->t('Remove this display'),
             'title' => $this->t('Remove this display'),
-          ),
-        ),
+          ],
+        ],
         '#access' => ($id !== 'default'),
-      );
+      ];
 
       if (!empty($display['deleted'])) {
-        $form['displays'][$id]['deleted'] = array(
+        $form['displays'][$id]['deleted'] = [
           '#type' => 'value',
           '#value' => TRUE,
-        );
+        ];
 
         $form['displays'][$id]['#attributes']['class'][] = 'hidden';
       }
@@ -149,7 +149,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
   public function submitForm(array &$form, FormStateInterface $form_state) {
     /** @var $view \Drupal\views_ui\ViewUI */
     $view = $form_state->get('view');
-    $order = array();
+    $order = [];
 
     $user_input = $form_state->getUserInput();
     foreach ($user_input['displays'] as $display => $info) {
diff --git a/core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php b/core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php
index 93bd049808062fd141032f10b42d49f8c338ee80..375766a4c3c92dc31a8f35dbf41678d968a8822d 100644
--- a/core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php
+++ b/core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php
@@ -108,7 +108,7 @@ public function getForm(ViewEntityInterface $view, $display_id, $js) {
       unset($view->stack[$key]);
 
       if (array_shift($top) != $identifier) {
-        $view->stack = array();
+        $view->stack = [];
       }
     }
 
@@ -138,7 +138,7 @@ public function getForm(ViewEntityInterface $view, $display_id, $js) {
       $form_state = $reflection->newInstanceArgs(array_slice($top, 3, 2))->getFormState($view, $top[2], $form_state->get('ajax'));
       $form_class = get_class($form_state->getFormObject());
 
-      $form_state->setUserInput(array());
+      $form_state->setUserInput([]);
       $form_url = views_ui_build_form_url($form_state);
       if (!$form_state->get('ajax')) {
         return new RedirectResponse($form_url->setAbsolute()->toString());
@@ -234,16 +234,16 @@ protected function ajaxFormWrapper($form_class, FormStateInterface &$form_state)
       $response->setAttachments($form['#attached']);
 
       $display = '';
-      $status_messages = array('#type' => 'status_messages');
+      $status_messages = ['#type' => 'status_messages'];
       if ($messages = $renderer->renderRoot($status_messages)) {
         $display = '<div class="views-messages">' . $messages . '</div>';
       }
       $display .= $output;
 
-      $options = array(
+      $options = [
         'dialogClass' => 'views-ui-dialog js-views-ui-dialog',
         'width' => '75%',
-      );
+      ];
 
       $response->addCommand(new OpenModalDialogCommand($title, $display, $options));
 
diff --git a/core/modules/views_ui/src/Form/BasicSettingsForm.php b/core/modules/views_ui/src/Form/BasicSettingsForm.php
index 61501960074c3aa76c0fd83cae9b7e3dc3d3d703..bcd533662c59054b68d2ade3dec7b9ee98b8f22f 100644
--- a/core/modules/views_ui/src/Form/BasicSettingsForm.php
+++ b/core/modules/views_ui/src/Form/BasicSettingsForm.php
@@ -65,7 +65,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form = parent::buildForm($form, $form_state);
 
     $config = $this->config('views.settings');
-    $options = array();
+    $options = [];
     foreach ($this->themeHandler->listInfo() as $name => $theme) {
       if ($theme->status) {
         $options[$name] = $theme->info['name'];
@@ -74,94 +74,94 @@ public function buildForm(array $form, FormStateInterface $form_state) {
 
     // This is not currently a fieldset but we may want it to be later,
     // so this will make it easier to change if we do.
-    $form['basic'] = array();
+    $form['basic'] = [];
 
-    $form['basic']['ui_show_master_display'] = array(
+    $form['basic']['ui_show_master_display'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Always show the master (default) display'),
       '#default_value' => $config->get('ui.show.master_display'),
-    );
+    ];
 
-    $form['basic']['ui_show_advanced_column'] = array(
+    $form['basic']['ui_show_advanced_column'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Always show advanced display settings'),
       '#default_value' => $config->get('ui.show.advanced_column'),
-    );
+    ];
 
-    $form['basic']['ui_show_display_embed'] = array(
+    $form['basic']['ui_show_display_embed'] = [
       '#type' => 'checkbox',
       '#title' => t('Allow embedded displays'),
       '#description' => t('Embedded displays can be used in code via views_embed_view().'),
       '#default_value' => $config->get('ui.show.display_embed'),
-    );
+    ];
 
-    $form['basic']['ui_exposed_filter_any_label'] = array(
+    $form['basic']['ui_exposed_filter_any_label'] = [
       '#type' => 'select',
       '#title' => $this->t('Label for "Any" value on non-required single-select exposed filters'),
-      '#options' => array('old_any' => '<Any>', 'new_any' => $this->t('- Any -')),
+      '#options' => ['old_any' => '<Any>', 'new_any' => $this->t('- Any -')],
       '#default_value' => $config->get('ui.exposed_filter_any_label'),
-    );
+    ];
 
-    $form['live_preview'] = array(
+    $form['live_preview'] = [
       '#type' => 'details',
       '#title' => $this->t('Live preview settings'),
       '#open' => TRUE,
-    );
+    ];
 
-    $form['live_preview']['ui_always_live_preview'] = array(
+    $form['live_preview']['ui_always_live_preview'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Automatically update preview on changes'),
       '#default_value' => $config->get('ui.always_live_preview'),
-    );
+    ];
 
-    $form['live_preview']['ui_show_preview_information'] = array(
+    $form['live_preview']['ui_show_preview_information'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Show information and statistics about the view during live preview'),
       '#default_value' => $config->get('ui.show.preview_information'),
-    );
+    ];
 
-    $form['live_preview']['options'] = array(
+    $form['live_preview']['options'] = [
       '#type' => 'container',
-      '#states' => array(
-        'visible' => array(
-          ':input[name="ui_show_preview_information"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-
-    $form['live_preview']['options']['ui_show_sql_query_enabled'] = array(
+      '#states' => [
+        'visible' => [
+          ':input[name="ui_show_preview_information"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
+
+    $form['live_preview']['options']['ui_show_sql_query_enabled'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Show the SQL query'),
       '#default_value' => $config->get('ui.show.sql_query.enabled'),
-    );
+    ];
 
-    $form['live_preview']['options']['ui_show_sql_query_where'] = array(
+    $form['live_preview']['options']['ui_show_sql_query_where'] = [
       '#type' => 'radios',
-      '#states' => array(
-        'visible' => array(
-          ':input[name="ui_show_sql_query_enabled"]' => array('checked' => TRUE),
-        ),
-      ),
+      '#states' => [
+        'visible' => [
+          ':input[name="ui_show_sql_query_enabled"]' => ['checked' => TRUE],
+        ],
+      ],
       '#title' => t('Show SQL query'),
-      '#options' => array(
+      '#options' => [
         'above' => $this->t('Above the preview'),
         'below' => $this->t('Below the preview'),
-      ),
+      ],
       '#default_value' => $config->get('ui.show.sql_query.where'),
-    );
+    ];
 
-    $form['live_preview']['options']['ui_show_performance_statistics'] = array(
+    $form['live_preview']['options']['ui_show_performance_statistics'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Show performance statistics'),
       '#default_value' => $config->get('ui.show.performance_statistics'),
-    );
+    ];
 
-    $form['live_preview']['options']['ui_show_additional_queries'] = array(
+    $form['live_preview']['options']['ui_show_additional_queries'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Show other queries run during render during live preview'),
       '#description' => $this->t("Drupal has the potential to run many queries while a view is being rendered. Checking this box will display every query run during view render as part of the live preview."),
       '#default_value' => $config->get('ui.show.additional_queries'),
-    );
+    ];
 
     return $form;
   }
diff --git a/core/modules/views_ui/src/Form/BreakLockForm.php b/core/modules/views_ui/src/Form/BreakLockForm.php
index 12a3e3efb86076cea91c86d9377ec5b92bc03fc4..94a626f2734e5e30f32dc617c9f0e109d102fa14 100644
--- a/core/modules/views_ui/src/Form/BreakLockForm.php
+++ b/core/modules/views_ui/src/Form/BreakLockForm.php
@@ -61,7 +61,7 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function getQuestion() {
-    return $this->t('Do you want to break the lock on view %name?', array('%name' => $this->entity->id()));
+    return $this->t('Do you want to break the lock on view %name?', ['%name' => $this->entity->id()]);
   }
 
   /**
@@ -70,11 +70,11 @@ public function getQuestion() {
   public function getDescription() {
     $locked = $this->tempStore->getMetadata($this->entity->id());
     $account = $this->entityManager->getStorage('user')->load($locked->owner);
-    $username = array(
+    $username = [
       '#theme' => 'username',
       '#account' => $account,
-    );
-    return $this->t('By breaking this lock, any unsaved changes made by @user will be lost.', array('@user' => drupal_render($username)));
+    ];
+    return $this->t('By breaking this lock, any unsaved changes made by @user will be lost.', ['@user' => drupal_render($username)]);
   }
 
   /**
@@ -96,7 +96,7 @@ public function getConfirmText() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     if (!$this->tempStore->getMetadata($this->entity->id())) {
-      $form['message']['#markup'] = $this->t('There is no lock on view %name to break.', array('%name' => $this->entity->id()));
+      $form['message']['#markup'] = $this->t('There is no lock on view %name to break.', ['%name' => $this->entity->id()]);
       return $form;
     }
     return parent::buildForm($form, $form_state);
diff --git a/core/modules/views_ui/src/Tests/AnalyzeTest.php b/core/modules/views_ui/src/Tests/AnalyzeTest.php
index 6cc9203d070dc77c23dc4f251ebbb7cd1a03f8d2..ef1744b3b710cbde1f1e9fb91ef2630d79db2da0 100644
--- a/core/modules/views_ui/src/Tests/AnalyzeTest.php
+++ b/core/modules/views_ui/src/Tests/AnalyzeTest.php
@@ -16,14 +16,14 @@ class AnalyzeTest extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui');
+  public static $modules = ['views_ui'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   protected function setUp() {
     parent::setUp();
@@ -31,7 +31,7 @@ protected function setUp() {
     $this->enableViewsTestModule();
 
     // Add an admin user will full rights;
-    $this->admin = $this->drupalCreateUser(array('administer views'));
+    $this->admin = $this->drupalCreateUser(['administer views']);
   }
 
   /**
@@ -47,13 +47,13 @@ function testAnalyzeBasic() {
     $this->clickLink(t('Analyze view'));
     $this->assertText(t('View analysis'));
 
-    foreach (array('ok', 'warning', 'error') as $type) {
-      $xpath = $this->xpath('//div[contains(@class, :class)]', array(':class' => $type));
-      $this->assertTrue(count($xpath), format_string('Analyse messages with @type found', array('@type' => $type)));
+    foreach (['ok', 'warning', 'error'] as $type) {
+      $xpath = $this->xpath('//div[contains(@class, :class)]', [':class' => $type]);
+      $this->assertTrue(count($xpath), format_string('Analyse messages with @type found', ['@type' => $type]));
     }
 
     // This redirects the user back to the main views edit page.
-    $this->drupalPostForm(NULL, array(), t('Ok'));
+    $this->drupalPostForm(NULL, [], t('Ok'));
   }
 
 }
diff --git a/core/modules/views_ui/src/Tests/ArgumentValidatorTest.php b/core/modules/views_ui/src/Tests/ArgumentValidatorTest.php
index b62f876e52f885cb11a8d0a5c1b1390f73601ee1..d94e682fb2b8f12b36a0168d6d8850918a032ef1 100644
--- a/core/modules/views_ui/src/Tests/ArgumentValidatorTest.php
+++ b/core/modules/views_ui/src/Tests/ArgumentValidatorTest.php
@@ -16,7 +16,7 @@ class ArgumentValidatorTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_argument');
+  public static $testViews = ['test_argument'];
 
   /**
    * Tests the 'Specify validation criteria' checkbox functionality.
@@ -46,12 +46,12 @@ public function testSpecifyValidation() {
    * @param bool $specify_validation
    */
   protected function saveArgumentHandlerWithValidationOptions($specify_validation) {
-    $options = array(
+    $options = [
       'options[validate][type]' => 'entity---node',
       'options[specify_validation]' => $specify_validation,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/handler/test_argument/default/argument/id', $options, t('Apply'));
-    $this->drupalPostForm('admin/structure/views/view/test_argument', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/views/view/test_argument', [], t('Save'));
   }
 
 }
diff --git a/core/modules/views_ui/src/Tests/CachedDataUITest.php b/core/modules/views_ui/src/Tests/CachedDataUITest.php
index 1f69b196d0411c13a8a6a2faf86ae965aa2a9c81..a605d0f29cb2196c19122c3f3710c0c36c611a6d 100644
--- a/core/modules/views_ui/src/Tests/CachedDataUITest.php
+++ b/core/modules/views_ui/src/Tests/CachedDataUITest.php
@@ -14,7 +14,7 @@ class CachedDataUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests the user tempstore views data in the UI.
@@ -28,7 +28,7 @@ public function testCacheData() {
 
     $this->drupalGet('admin/structure/views/view/test_view/edit');
     // Make sure we have 'changes' to the view.
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/title', array(), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/title', [], t('Apply'));
     $this->assertText('You have unsaved changes.');
     $this->assertEqual($temp_store->getMetadata('test_view')->owner, $views_admin_user_uid, 'View cache has been saved.');
 
@@ -39,13 +39,13 @@ public function testCacheData() {
     $this->assertEqual($temp_store->getMetadata('test_view')->owner, $views_admin_user_uid, 'The view is locked.');
 
     // Cancel the view edit and make sure the cache is deleted.
-    $this->drupalPostForm(NULL, array(), t('Cancel'));
+    $this->drupalPostForm(NULL, [], t('Cancel'));
     $this->assertEqual($temp_store->getMetadata('test_view'), NULL, 'User tempstore data has been removed.');
     // Test we are redirected to the view listing page.
-    $this->assertUrl('admin/structure/views', array(), 'Redirected back to the view listing page.');
+    $this->assertUrl('admin/structure/views', [], 'Redirected back to the view listing page.');
 
     // Log in with another user and make sure the view is locked and break.
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/title', array(), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/title', [], t('Apply'));
     $this->drupalLogin($this->adminUser);
 
     $this->drupalGet('admin/structure/views/view/test_view/edit');
@@ -56,17 +56,17 @@ public function testCacheData() {
     $this->assertLinkByHref('admin/structure/views/view/test_view/break-lock');
     // Break the lock.
     $this->clickLink(t('break this lock'));
-    $this->drupalPostForm(NULL, array(), t('Break lock'));
+    $this->drupalPostForm(NULL, [], t('Break lock'));
     // Test that save and cancel buttons are shown.
     $this->assertFieldById('edit-actions-submit', t('Save'));
     $this->assertFieldById('edit-actions-cancel', t('Cancel'));
     // Test we can save the view.
-    $this->drupalPostForm('admin/structure/views/view/test_view/edit', array(), t('Save'));
-    $this->assertRaw(t('The view %view has been saved.', array('%view' => 'Test view')));
+    $this->drupalPostForm('admin/structure/views/view/test_view/edit', [], t('Save'));
+    $this->assertRaw(t('The view %view has been saved.', ['%view' => 'Test view']));
 
     // Test that a deleted view has no tempstore data.
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/title', array(), t('Apply'));
-    $this->drupalPostForm('admin/structure/views/view/test_view/delete', array(), t('Delete'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/default/title', [], t('Apply'));
+    $this->drupalPostForm('admin/structure/views/view/test_view/delete', [], t('Delete'));
     // No view tempstore data should be returned for this view after deletion.
     $this->assertEqual($temp_store->getMetadata('test_view'), NULL, 'View tempstore data has been removed after deletion.');
   }
diff --git a/core/modules/views_ui/src/Tests/CustomBooleanTest.php b/core/modules/views_ui/src/Tests/CustomBooleanTest.php
index ecde493b63f49f563fa3fed81e73c5d794855c10..adae59ab22c8d9de64e9412b620f531393192328 100644
--- a/core/modules/views_ui/src/Tests/CustomBooleanTest.php
+++ b/core/modules/views_ui/src/Tests/CustomBooleanTest.php
@@ -18,7 +18,7 @@ class CustomBooleanTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * \Drupal\views\Tests\ViewTestBase::viewsData().
@@ -47,15 +47,15 @@ public function testCustomOption() {
     $view = Views::getView('test_view');
     $view->setDisplay();
 
-    $view->displayHandlers->get('default')->overrideOption('fields', array(
-      'age' => array(
+    $view->displayHandlers->get('default')->overrideOption('fields', [
+      'age' => [
         'id' => 'age',
         'table' => 'views_test_data',
         'field' => 'age',
         'relationship' => 'none',
         'plugin_id' => 'boolean',
-      ),
-    ));
+      ],
+    ]);
     $view->save();
 
     $this->executeView($view);
@@ -64,35 +64,35 @@ public function testCustomOption() {
     $custom_false = 'Nay';
 
     // Set up some custom value mappings for different types.
-    $custom_values = array(
-      'plain' => array(
+    $custom_values = [
+      'plain' => [
         'true' => $custom_true,
         'false' => $custom_false,
         'test' => 'assertTrue',
-      ),
-      'allowed tag' => array(
+      ],
+      'allowed tag' => [
         'true' => '<p>' . $custom_true . '</p>',
         'false' => '<p>' . $custom_false . '</p>',
         'test' => 'assertTrue',
-      ),
-      'disallowed tag' => array(
+      ],
+      'disallowed tag' => [
         'true' => '<script>' . $custom_true . '</script>',
         'false' => '<script>' . $custom_false . '</script>',
         'test' => 'assertFalse',
-      ),
-    );
+      ],
+    ];
 
     // Run the same tests on each type.
     foreach ($custom_values as $type => $values) {
-      $options = array(
+      $options = [
         'options[type]' => 'custom',
         'options[type_custom_true]' => $values['true'],
         'options[type_custom_false]' => $values['false'],
-      );
+      ];
       $this->drupalPostForm('admin/structure/views/nojs/handler/test_view/default/field/age', $options, 'Apply');
 
       // Save the view.
-      $this->drupalPostForm('admin/structure/views/view/test_view', array(), 'Save');
+      $this->drupalPostForm('admin/structure/views/view/test_view', [], 'Save');
 
       $view = Views::getView('test_view');
       $output = $view->preview();
@@ -136,35 +136,35 @@ public function testCustomOptionTemplate() {
     $custom_false = 'Nay';
 
     // Set up some custom value mappings for different types.
-    $custom_values = array(
-      'plain' => array(
+    $custom_values = [
+      'plain' => [
         'true' => $custom_true,
         'false' => $custom_false,
         'test' => 'assertTrue',
-      ),
-      'allowed tag' => array(
+      ],
+      'allowed tag' => [
         'true' => '<p>' . $custom_true . '</p>',
         'false' => '<p>' . $custom_false . '</p>',
         'test' => 'assertTrue',
-      ),
-      'disallowed tag' => array(
+      ],
+      'disallowed tag' => [
         'true' => '<script>' . $custom_true . '</script>',
         'false' => '<script>' . $custom_false . '</script>',
         'test' => 'assertFalse',
-      ),
-    );
+      ],
+    ];
 
     // Run the same tests on each type.
     foreach ($custom_values as $type => $values) {
-      $options = array(
+      $options = [
         'options[type]' => 'custom',
         'options[type_custom_true]' => $values['true'],
         'options[type_custom_false]' => $values['false'],
-      );
+      ];
       $this->drupalPostForm('admin/structure/views/nojs/handler/test_view/default/field/age', $options, 'Apply');
 
       // Save the view.
-      $this->drupalPostForm('admin/structure/views/view/test_view', array(), 'Save');
+      $this->drupalPostForm('admin/structure/views/view/test_view', [], 'Save');
 
       $view = Views::getView('test_view');
       $output = $view->preview();
diff --git a/core/modules/views_ui/src/Tests/DefaultViewsTest.php b/core/modules/views_ui/src/Tests/DefaultViewsTest.php
index 08fcae8ea4eef534935c48eb8eb45b8ad5f8d2be..855cbdad7d77dea409b63847a19dd6efb9b02173 100644
--- a/core/modules/views_ui/src/Tests/DefaultViewsTest.php
+++ b/core/modules/views_ui/src/Tests/DefaultViewsTest.php
@@ -18,7 +18,7 @@ class DefaultViewsTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view_status', 'test_page_display_menu', 'test_page_display_arguments');
+  public static $testViews = ['test_view_status', 'test_page_display_menu', 'test_page_display_arguments'];
 
 
   protected function setUp() {
@@ -55,16 +55,16 @@ function testDefaultViews() {
     // Edit the view and change the title. Make sure that the new title is
     // displayed.
     $new_title = $this->randomMachineName(16);
-    $edit = array('title' => $new_title);
+    $edit = ['title' => $new_title];
     $this->drupalPostForm('admin/structure/views/nojs/display/glossary/page_1/title', $edit, t('Apply'));
-    $this->drupalPostForm('admin/structure/views/view/glossary/edit/page_1', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/views/view/glossary/edit/page_1', [], t('Save'));
     $this->drupalGet('glossary');
     $this->assertResponse(200);
     $this->assertText($new_title);
 
     // Save another view in the UI.
-    $this->drupalPostForm('admin/structure/views/nojs/display/archive/page_1/title', array(), t('Apply'));
-    $this->drupalPostForm('admin/structure/views/view/archive/edit/page_1', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/archive/page_1/title', [], t('Apply'));
+    $this->drupalPostForm('admin/structure/views/view/archive/edit/page_1', [], t('Save'));
 
     // Check there is an enable link. i.e. The view has not been enabled after
     // editing.
@@ -85,19 +85,19 @@ function testDefaultViews() {
     // Duplicate the view and check that the normal schema of duplicated views is used.
     $this->drupalGet('admin/structure/views');
     $this->clickViewsOperationLink(t('Duplicate'), '/glossary');
-    $edit = array(
+    $edit = [
       'id' => 'duplicate_of_glossary',
-    );
-    $this->assertTitle(t('Duplicate of @label | @site-name', array('@label' => 'Glossary', '@site-name' => $this->config('system.site')->get('name'))));
+    ];
+    $this->assertTitle(t('Duplicate of @label | @site-name', ['@label' => 'Glossary', '@site-name' => $this->config('system.site')->get('name')]));
     $this->drupalPostForm(NULL, $edit, t('Duplicate'));
-    $this->assertUrl('admin/structure/views/view/duplicate_of_glossary', array(), 'The normal duplicating name schema is applied.');
+    $this->assertUrl('admin/structure/views/view/duplicate_of_glossary', [], 'The normal duplicating name schema is applied.');
 
     // Duplicate a view and set a custom name.
     $this->drupalGet('admin/structure/views');
     $this->clickViewsOperationLink(t('Duplicate'), '/glossary');
     $random_name = strtolower($this->randomMachineName());
-    $this->drupalPostForm(NULL, array('id' => $random_name), t('Duplicate'));
-    $this->assertUrl("admin/structure/views/view/$random_name", array(), 'The custom view name got saved.');
+    $this->drupalPostForm(NULL, ['id' => $random_name], t('Duplicate'));
+    $this->assertUrl("admin/structure/views/view/$random_name", [], 'The custom view name got saved.');
 
     // Now disable the view, and make sure it stops appearing on the main view
     // listing page but instead goes back to displaying on the disabled views
@@ -129,7 +129,7 @@ function testDefaultViews() {
     $this->drupalGet('admin/structure/views');
     $this->clickViewsOperationLink(t('Delete'), '/glossary/');
     // Submit the confirmation form.
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     // Ensure the view is no longer listed.
     $this->assertUrl('admin/structure/views');
     $this->assertNoLinkByHref($edit_href);
@@ -142,7 +142,7 @@ function testDefaultViews() {
     $this->drupalGet('admin/structure/views');
     $this->clickViewsOperationLink(t('Delete'), 'duplicate_of_glossary');
     // Submit the confirmation form.
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
 
     $this->drupalGet('glossary');
     $this->assertResponse(200);
@@ -150,7 +150,7 @@ function testDefaultViews() {
     $this->drupalGet('admin/structure/views');
     $this->clickViewsOperationLink(t('Delete'), $random_name);
     // Submit the confirmation form.
-    $this->drupalPostForm(NULL, array(), t('Delete'));
+    $this->drupalPostForm(NULL, [], t('Delete'));
     $this->drupalGet('glossary');
     $this->assertResponse(404);
     $this->assertText('Page not found');
@@ -163,10 +163,10 @@ function testSplitListing() {
     // Build a re-usable xpath query.
     $xpath = '//div[@id="views-entity-list"]/div[@class = :status]/table//td/text()[contains(., :title)]';
 
-    $arguments = array(
+    $arguments = [
       ':status' => 'views-list-section enabled',
       ':title' => 'test_view_status',
-    );
+    ];
 
     $this->drupalGet('admin/structure/views');
 
@@ -228,7 +228,7 @@ public function testPathDestination() {
    *   failure. Failure also results in a failed assertion.
    */
   function clickViewsOperationLink($label, $unique_href_part) {
-    $links = $this->xpath('//a[normalize-space(text())=:label]', array(':label' => $label));
+    $links = $this->xpath('//a[normalize-space(text())=:label]', [':label' => $label]);
     foreach ($links as $link_index => $link) {
       $position = strpos($link['href'], $unique_href_part);
       if ($position !== FALSE) {
@@ -236,7 +236,7 @@ function clickViewsOperationLink($label, $unique_href_part) {
         break;
       }
     }
-    $this->assertTrue(isset($index), format_string('Link to "@label" containing @part found.', array('@label' => $label, '@part' => $unique_href_part)));
+    $this->assertTrue(isset($index), format_string('Link to "@label" containing @part found.', ['@label' => $label, '@part' => $unique_href_part]));
     if (isset($index)) {
       return $this->clickLink($label, $index);
     }
diff --git a/core/modules/views_ui/src/Tests/DisplayAttachmentTest.php b/core/modules/views_ui/src/Tests/DisplayAttachmentTest.php
index 9cff06e11e3a2f7df74a970a34fde726274faf9f..480172bb33c59124d05590885eb06d422c08ef60 100644
--- a/core/modules/views_ui/src/Tests/DisplayAttachmentTest.php
+++ b/core/modules/views_ui/src/Tests/DisplayAttachmentTest.php
@@ -17,7 +17,7 @@ class DisplayAttachmentTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_attachment_ui');
+  public static $testViews = ['test_attachment_ui'];
 
   /**
    * Tests the attachment UI.
@@ -31,31 +31,31 @@ public function testAttachmentUI() {
     // Display labels should be escaped.
     $this->assertEscaped('<em>Page</em>');
 
-    foreach (array('default', 'page-1') as $display_id) {
-      $this->assertNoFieldChecked("edit-displays-$display_id", format_string('Make sure the @display_id can be marked as attached', array('@display_id' => $display_id)));
+    foreach (['default', 'page-1'] as $display_id) {
+      $this->assertNoFieldChecked("edit-displays-$display_id", format_string('Make sure the @display_id can be marked as attached', ['@display_id' => $display_id]));
     }
 
     // Save the attachments and test the value on the view.
-    $this->drupalPostForm($attachment_display_url, array('displays[page_1]' => 1), t('Apply'));
+    $this->drupalPostForm($attachment_display_url, ['displays[page_1]' => 1], t('Apply'));
     // Options summary should be escaped.
     $this->assertEscaped('<em>Page</em>');
     $this->assertNoRaw('<em>Page</em>');
-    $result = $this->xpath('//a[@id = :id]', array(':id' => 'views-attachment-1-displays'));
+    $result = $this->xpath('//a[@id = :id]', [':id' => 'views-attachment-1-displays']);
     $this->assertEqual($result[0]->attributes()->title, t('Page'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $view = Views::getView('test_attachment_ui');
     $view->initDisplay();
-    $this->assertEqual(array_keys(array_filter($view->displayHandlers->get('attachment_1')->getOption('displays'))), array('page_1'), 'The attached displays got saved as expected');
+    $this->assertEqual(array_keys(array_filter($view->displayHandlers->get('attachment_1')->getOption('displays'))), ['page_1'], 'The attached displays got saved as expected');
 
-    $this->drupalPostForm($attachment_display_url, array('displays[default]' => 1, 'displays[page_1]' => 1), t('Apply'));
-    $result = $this->xpath('//a[@id = :id]', array(':id' => 'views-attachment-1-displays'));
+    $this->drupalPostForm($attachment_display_url, ['displays[default]' => 1, 'displays[page_1]' => 1], t('Apply'));
+    $result = $this->xpath('//a[@id = :id]', [':id' => 'views-attachment-1-displays']);
     $this->assertEqual($result[0]->attributes()->title, t('Multiple displays'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $view = Views::getView('test_attachment_ui');
     $view->initDisplay();
-    $this->assertEqual(array_keys($view->displayHandlers->get('attachment_1')->getOption('displays')), array('default', 'page_1'), 'The attached displays got saved as expected');
+    $this->assertEqual(array_keys($view->displayHandlers->get('attachment_1')->getOption('displays')), ['default', 'page_1'], 'The attached displays got saved as expected');
   }
 
   /**
@@ -69,21 +69,21 @@ public function testRemoveAttachedDisplay() {
 
     // Open the Page display and create the attachment display.
     $this->drupalGet($path_prefix . '/page_1');
-    $this->drupalPostForm(NULL, array(), 'Add Attachment');
+    $this->drupalPostForm(NULL, [], 'Add Attachment');
     $this->assertText(t('Not defined'), 'The right text appears if there is no attachment selection yet.');
 
     // Attach the Attachment to the Page display.
-    $this->drupalPostForm($attachment_display_url, array('displays[page_1]' => 1), t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm($attachment_display_url, ['displays[page_1]' => 1], t('Apply'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Open the Page display and mark it as deleted.
     $this->drupalGet($path_prefix . '/page_1');
     $this->assertFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-delete', 'Delete Page', 'Make sure there is a delete button on the page display.');
-    $this->drupalPostForm($path_prefix . '/page_1', array(), 'Delete Page');
+    $this->drupalPostForm($path_prefix . '/page_1', [], 'Delete Page');
 
     // Open the attachment display and save it.
     $this->drupalGet($path_prefix . '/attachment_1');
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Check that there is no warning for the removed page display.
     $this->assertNoText("Plugin ID &#039;page_1&#039; was not found.");
diff --git a/core/modules/views_ui/src/Tests/DisplayCRUDTest.php b/core/modules/views_ui/src/Tests/DisplayCRUDTest.php
index 1e060dcb78d23e6e5c9118cdf3ff8a11bd53037b..e29f0a94e926e876dc6872adc23c89707fb5787b 100644
--- a/core/modules/views_ui/src/Tests/DisplayCRUDTest.php
+++ b/core/modules/views_ui/src/Tests/DisplayCRUDTest.php
@@ -16,14 +16,14 @@ class DisplayCRUDTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_display');
+  public static $testViews = ['test_display'];
 
   /**
    * Modules to enable
    *
    * @var array
    */
-  public static $modules = array('contextual');
+  public static $modules = ['contextual'];
 
   /**
    * Tests adding a display.
@@ -39,14 +39,14 @@ public function testAddDisplay() {
     $this->drupalGet($path_prefix);
 
     // Add a new display.
-    $this->drupalPostForm(NULL, array(), 'Add Page');
+    $this->drupalPostForm(NULL, [], 'Add Page');
     $this->assertLinkByHref($path_prefix . '/page_1', 0, 'Make sure after adding a display the new display appears in the UI');
 
     $this->assertNoLink('Master*', 'Make sure the master display is not marked as changed.');
     $this->assertLink('Page*', 0, 'Make sure the added display is marked as changed.');
 
-    $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_1/path", array('path' => 'test/path'), t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_1/path", ['path' => 'test/path'], t('Apply'));
+    $this->drupalPostForm(NULL, [], t('Save'));
   }
 
   /**
@@ -63,22 +63,22 @@ public function testRemoveDisplay() {
     $this->assertFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-delete', 'Delete Page', 'Make sure there is a delete button on the page display.');
 
     // Delete the page, so we can test the undo process.
-    $this->drupalPostForm($path_prefix . '/page_1', array(), 'Delete Page');
+    $this->drupalPostForm($path_prefix . '/page_1', [], 'Delete Page');
     $this->assertFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-undo-delete', 'Undo delete of Page', 'Make sure there a undo button on the page display after deleting.');
-    $element = $this->xpath('//a[contains(@href, :href) and contains(@class, :class)]', array(':href' => $path_prefix . '/page_1', ':class' => 'views-display-deleted-link'));
+    $element = $this->xpath('//a[contains(@href, :href) and contains(@class, :class)]', [':href' => $path_prefix . '/page_1', ':class' => 'views-display-deleted-link']);
     $this->assertTrue(!empty($element), 'Make sure the display link is marked as to be deleted.');
 
-    $element = $this->xpath('//a[contains(@href, :href) and contains(@class, :class)]', array(':href' => $path_prefix . '/page_1', ':class' => 'views-display-deleted-link'));
+    $element = $this->xpath('//a[contains(@href, :href) and contains(@class, :class)]', [':href' => $path_prefix . '/page_1', ':class' => 'views-display-deleted-link']);
     $this->assertTrue(!empty($element), 'Make sure the display link is marked as to be deleted.');
 
     // Undo the deleting of the display.
-    $this->drupalPostForm($path_prefix . '/page_1', array(), 'Undo delete of Page');
+    $this->drupalPostForm($path_prefix . '/page_1', [], 'Undo delete of Page');
     $this->assertNoFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-undo-delete', 'Undo delete of Page', 'Make sure there is no undo button on the page display after reverting.');
     $this->assertFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-delete', 'Delete Page', 'Make sure there is a delete button on the page display after the reverting.');
 
     // Now delete again and save the view.
-    $this->drupalPostForm($path_prefix . '/page_1', array(), 'Delete Page');
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm($path_prefix . '/page_1', [], 'Delete Page');
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $this->assertNoLinkByHref($path_prefix . '/page_1', 'Make sure there is no display tab for the deleted display.');
 
@@ -86,9 +86,9 @@ public function testRemoveDisplay() {
     $view = $this->randomView();
     $machine_name = 'new_machine_name';
     $path_prefix = 'admin/structure/views/view/' . $view['id'] . '/edit';
-    $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_1/display_id", array('display_id' => $machine_name), 'Apply');
-    $this->drupalPostForm(NULL, array(), 'Delete Page');
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_1/display_id", ['display_id' => $machine_name], 'Apply');
+    $this->drupalPostForm(NULL, [], 'Delete Page');
+    $this->drupalPostForm(NULL, [], t('Save'));
     $this->assertResponse(200);
     $this->assertNoLinkByHref($path_prefix . '/new_machine_name', 'Make sure there is no display tab for the deleted display.');
   }
@@ -111,24 +111,24 @@ public function testDuplicateDisplay() {
     $path = $view['page[path]'];
 
     $this->drupalGet($path_prefix);
-    $this->drupalPostForm(NULL, array(), 'Duplicate Page');
+    $this->drupalPostForm(NULL, [], 'Duplicate Page');
     $this->assertLinkByHref($path_prefix . '/page_2', 0, 'Make sure after duplicating the new display appears in the UI');
-    $this->assertUrl($path_prefix . '/page_2', array(), 'The user got redirected to the new display.');
+    $this->assertUrl($path_prefix . '/page_2', [], 'The user got redirected to the new display.');
 
     // Set the title and override the css classes.
     $random_title = $this->randomMachineName();
     $random_css = $this->randomMachineName();
-    $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_2/title", array('title' => $random_title), t('Apply'));
-    $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_2/css_class", array('override[dropdown]' => 'page_2', 'css_class' => $random_css), t('Apply'));
+    $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_2/title", ['title' => $random_title], t('Apply'));
+    $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_2/css_class", ['override[dropdown]' => 'page_2', 'css_class' => $random_css], t('Apply'));
 
     // Duplicate as a different display type.
-    $this->drupalPostForm(NULL, array(), 'Duplicate as Block');
+    $this->drupalPostForm(NULL, [], 'Duplicate as Block');
     $this->assertLinkByHref($path_prefix . '/block_1', 0, 'Make sure after duplicating the new display appears in the UI');
-    $this->assertUrl($path_prefix . '/block_1', array(), 'The user got redirected to the new display.');
+    $this->assertUrl($path_prefix . '/block_1', [], 'The user got redirected to the new display.');
     $this->assertText(t('Block settings'));
     $this->assertNoText(t('Page settings'));
 
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $view = Views::getView($view['id']);
     $view->initDisplay();
 
diff --git a/core/modules/views_ui/src/Tests/DisplayExtenderUITest.php b/core/modules/views_ui/src/Tests/DisplayExtenderUITest.php
index 7e26dffd23cd4a0789b4cb6671302a5e61e1a7ca..e8eff0a0cb4483328aec279fefbba897bb4005b6 100644
--- a/core/modules/views_ui/src/Tests/DisplayExtenderUITest.php
+++ b/core/modules/views_ui/src/Tests/DisplayExtenderUITest.php
@@ -16,13 +16,13 @@ class DisplayExtenderUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests the display extender UI.
    */
   public function testDisplayExtenderUI() {
-    $this->config('views.settings')->set('display_extenders', array('display_extender_test'))->save();
+    $this->config('views.settings')->set('display_extenders', ['display_extender_test'])->save();
 
     $view = Views::getView('test_view');
     $view_edit_url = "admin/structure/views/view/{$view->storage->id()}/edit";
@@ -32,9 +32,9 @@ public function testDisplayExtenderUI() {
     $this->assertLinkByHref($display_option_url, 0, 'Make sure the option defined by the test display extender appears in the UI.');
 
     $random_text = $this->randomMachineName();
-    $this->drupalPostForm($display_option_url, array('test_extender_test_option' => $random_text), t('Apply'));
+    $this->drupalPostForm($display_option_url, ['test_extender_test_option' => $random_text], t('Apply'));
     $this->assertLink($random_text);
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $view = Views::getView($view->storage->id());
     $view->initDisplay();
     $display_extender_options = $view->display_handler->getOption('display_extenders');
diff --git a/core/modules/views_ui/src/Tests/DisplayFeedTest.php b/core/modules/views_ui/src/Tests/DisplayFeedTest.php
index 4e7bf8a4c74f2ce7a12231e4a46747166bdd21bf..d8d003191ed004586252683dfa95d6c07215ac94 100644
--- a/core/modules/views_ui/src/Tests/DisplayFeedTest.php
+++ b/core/modules/views_ui/src/Tests/DisplayFeedTest.php
@@ -15,14 +15,14 @@ class DisplayFeedTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_display_feed', 'test_style_opml');
+  public static $testViews = ['test_display_feed', 'test_style_opml'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'aggregator');
+  public static $modules = ['views_ui', 'aggregator'];
 
   /**
    * Tests feed display admin UI.
@@ -55,7 +55,7 @@ protected function checkFeedViewUi($view_name) {
 
     // Load all the options of the checkbox.
     $result = $this->xpath('//div[@id="edit-displays"]/div');
-    $options = array();
+    $options = [];
     foreach ($result as $item) {
       foreach ($item->input->attributes() as $attribute => $value) {
         if ($attribute == 'value') {
@@ -64,10 +64,10 @@ protected function checkFeedViewUi($view_name) {
       }
     }
 
-    $this->assertEqual($options, array('default', 'page'), 'Make sure all displays appears as expected.');
+    $this->assertEqual($options, ['default', 'page'], 'Make sure all displays appears as expected.');
 
     // Post and save this and check the output.
-    $this->drupalPostForm('admin/structure/views/nojs/display/' . $view_name . '/feed_1/displays', array('displays[page]' => 'page'), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/' . $view_name . '/feed_1/displays', ['displays[page]' => 'page'], t('Apply'));
     // Options summary should be escaped.
     $this->assertEscaped('<em>Page</em>');
     $this->assertNoRaw('<em>Page</em>');
@@ -76,7 +76,7 @@ protected function checkFeedViewUi($view_name) {
     $this->assertFieldByXpath('//*[@id="views-feed-1-displays"]', '<em>Page</em>');
 
     // Add the default display, so there should now be multiple displays.
-    $this->drupalPostForm('admin/structure/views/nojs/display/' . $view_name . '/feed_1/displays', array('displays[default]' => 'default'), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/' . $view_name . '/feed_1/displays', ['displays[default]' => 'default'], t('Apply'));
     $this->drupalGet('admin/structure/views/view/' . $view_name . '/edit/feed_1');
     $this->assertFieldByXpath('//*[@id="views-feed-1-displays"]', 'Multiple displays');
   }
diff --git a/core/modules/views_ui/src/Tests/DisplayPathTest.php b/core/modules/views_ui/src/Tests/DisplayPathTest.php
index 8baa50649a4f10b5ca79ee96974a1038b3cf25d0..d1d1732bababa81bc4a054a8ffb0685fa6ccbf9d 100644
--- a/core/modules/views_ui/src/Tests/DisplayPathTest.php
+++ b/core/modules/views_ui/src/Tests/DisplayPathTest.php
@@ -21,14 +21,14 @@ protected function setUp() {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('menu_ui');
+  public static $modules = ['menu_ui'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'test_page_display_menu');
+  public static $testViews = ['test_view', 'test_page_display_menu'];
 
   /**
    * Runs the tests.
@@ -46,9 +46,9 @@ protected function doBasicPathUITest() {
     $this->drupalGet('admin/structure/views/view/test_view');
 
     // Add a new page display and check the appearing text.
-    $this->drupalPostForm(NULL, array(), 'Add Page');
+    $this->drupalPostForm(NULL, [], 'Add Page');
     $this->assertText(t('No path is set'), 'The right text appears if no path was set.');
-    $this->assertNoLink(t('View @display', array('@display' => 'page')), 'No view page link found on the page.');
+    $this->assertNoLink(t('View @display', ['@display' => 'page']), 'No view page link found on the page.');
 
     // Save a path and make sure the summary appears as expected.
     $random_path = $this->randomMachineName();
@@ -56,7 +56,7 @@ protected function doBasicPathUITest() {
     //   longer use Url::fromUri(), and this path will be able to contain ':'.
     $random_path = str_replace(':', '', $random_path);
 
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', array('path' => $random_path), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', ['path' => $random_path], t('Apply'));
     $this->assertText('/' . $random_path, 'The custom path appears in the summary.');
     $display_link_text = t('View @display', ['@display' => 'Page']);
     $this->assertLink($display_link_text, 0, 'view page link found on the page.');
@@ -69,13 +69,13 @@ protected function doBasicPathUITest() {
    */
   public function doPathXssFilterTest() {
     $this->drupalGet('admin/structure/views/view/test_view');
-    $this->drupalPostForm(NULL, array(), 'Add Page');
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_2/path', array('path' => '<object>malformed_path</object>'), t('Apply'));
-    $this->drupalPostForm(NULL, array(), 'Add Page');
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_3/path', array('path' => '<script>alert("hello");</script>'), t('Apply'));
-    $this->drupalPostForm(NULL, array(), 'Add Page');
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_4/path', array('path' => '<script>alert("hello I have placeholders %");</script>'), t('Apply'));
-    $this->drupalPostForm('admin/structure/views/view/test_view', array(), t('Save'));
+    $this->drupalPostForm(NULL, [], 'Add Page');
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_2/path', ['path' => '<object>malformed_path</object>'], t('Apply'));
+    $this->drupalPostForm(NULL, [], 'Add Page');
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_3/path', ['path' => '<script>alert("hello");</script>'], t('Apply'));
+    $this->drupalPostForm(NULL, [], 'Add Page');
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_4/path', ['path' => '<script>alert("hello I have placeholders %");</script>'], t('Apply'));
+    $this->drupalPostForm('admin/structure/views/view/test_view', [], t('Save'));
     $this->drupalGet('admin/structure/views');
     // The anchor text should be escaped.
     $this->assertEscaped('/<object>malformed_path</object>');
@@ -92,11 +92,11 @@ public function doPathXssFilterTest() {
   protected function doAdvancedPathsValidationTest() {
     $url = 'admin/structure/views/nojs/display/test_view/page_1/path';
 
-    $this->drupalPostForm($url, array('path' => '%/magrathea'), t('Apply'));
+    $this->drupalPostForm($url, ['path' => '%/magrathea'], t('Apply'));
     $this->assertUrl($url);
     $this->assertText('"%" may not be used for the first segment of a path.');
 
-    $this->drupalPostForm($url, array('path' => 'user/%1/example'), t('Apply'));
+    $this->drupalPostForm($url, ['path' => 'user/%1/example'], t('Apply'));
     $this->assertUrl($url);
     $this->assertText("Numeric placeholders may not be used. Please use plain placeholders (%).");
   }
@@ -106,51 +106,51 @@ protected function doAdvancedPathsValidationTest() {
    */
   public function testDeleteWithNoPath() {
     $this->drupalGet('admin/structure/views/view/test_view');
-    $this->drupalPostForm(NULL, array(), t('Add Page'));
-    $this->drupalPostForm(NULL, array(), t('Delete Page'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
-    $this->assertRaw(t('The view %view has been saved.', array('%view' => 'Test view')));
+    $this->drupalPostForm(NULL, [], t('Add Page'));
+    $this->drupalPostForm(NULL, [], t('Delete Page'));
+    $this->drupalPostForm(NULL, [], t('Save'));
+    $this->assertRaw(t('The view %view has been saved.', ['%view' => 'Test view']));
   }
 
   /**
    * Tests the menu and tab option form.
    */
   public function testMenuOptions() {
-    $this->container->get('module_installer')->install(array('menu_ui'));
+    $this->container->get('module_installer')->install(['menu_ui']);
     $this->drupalGet('admin/structure/views/view/test_view');
 
     // Add a new page display.
-    $this->drupalPostForm(NULL, array(), 'Add Page');
+    $this->drupalPostForm(NULL, [], 'Add Page');
 
     // Add an invalid path (only fragment).
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', array('path' => '#foo'), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', ['path' => '#foo'], t('Apply'));
     $this->assertText('Path is empty');
 
     // Add an invalid path with a query.
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', array('path' => 'foo?bar'), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', ['path' => 'foo?bar'], t('Apply'));
     $this->assertText('No query allowed.');
 
     // Add an invalid path with just a query.
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', array('path' => '?bar'), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', ['path' => '?bar'], t('Apply'));
     $this->assertText('Path is empty');
 
     // Provide a random, valid path string.
     $random_string = $this->randomMachineName();
 
     // Save a path.
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', array('path' => $random_string), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/path', ['path' => $random_string], t('Apply'));
     $this->drupalGet('admin/structure/views/view/test_view');
 
-    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/menu', array('menu[type]' => 'default tab', 'menu[title]' => 'Test tab title'), t('Apply'));
+    $this->drupalPostForm('admin/structure/views/nojs/display/test_view/page_1/menu', ['menu[type]' => 'default tab', 'menu[title]' => 'Test tab title'], t('Apply'));
     $this->assertResponse(200);
     $this->assertUrl('admin/structure/views/nojs/display/test_view/page_1/tab_options');
 
-    $this->drupalPostForm(NULL, array('tab_options[type]' => 'tab', 'tab_options[title]' => $this->randomString()), t('Apply'));
+    $this->drupalPostForm(NULL, ['tab_options[type]' => 'tab', 'tab_options[title]' => $this->randomString()], t('Apply'));
     $this->assertResponse(200);
     $this->assertUrl('admin/structure/views/view/test_view/edit/page_1');
 
     $this->drupalGet('admin/structure/views/view/test_view');
-    $this->assertLink(t('Tab: @title', array('@title' => 'Test tab title')));
+    $this->assertLink(t('Tab: @title', ['@title' => 'Test tab title']));
     // If it's a default tab, it should also have an additional settings link.
     $this->assertLinkByHref('admin/structure/views/nojs/display/test_view/page_1/tab_options');
 
diff --git a/core/modules/views_ui/src/Tests/DisplayTest.php b/core/modules/views_ui/src/Tests/DisplayTest.php
index 7f5f12547b52902598a796ea0a81f79ec7a50aa7..afb2c7ff069039969ede896bb911930ef28e415f 100644
--- a/core/modules/views_ui/src/Tests/DisplayTest.php
+++ b/core/modules/views_ui/src/Tests/DisplayTest.php
@@ -20,14 +20,14 @@ class DisplayTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_display');
+  public static $testViews = ['test_display'];
 
   /**
    * Modules to enable
    *
    * @var array
    */
-  public static $modules = array('contextual');
+  public static $modules = ['contextual'];
 
   /**
    * Tests adding a display.
@@ -53,9 +53,9 @@ public function testAddDisplay() {
    * Tests reordering of displays.
    */
   public function testReorderDisplay() {
-    $view = array(
+    $view = [
       'block[create]' => TRUE
-    );
+    ];
     $view = $this->randomView($view);
 
     $this->clickLink(t('Reorder displays'));
@@ -64,15 +64,15 @@ public function testReorderDisplay() {
     $this->assertTrue($this->xpath('//tr[@id="display-row-block_1"]'), 'Make sure the block display appears on the reorder listing');
 
     // Ensure the view displays are in the expected order in configuration.
-    $expected_display_order = array('default', 'block_1', 'page_1');
+    $expected_display_order = ['default', 'block_1', 'page_1'];
     $this->assertEqual(array_keys(Views::getView($view['id'])->storage->get('display')), $expected_display_order, 'The correct display names are present.');
     // Put the block display in front of the page display.
-    $edit = array(
+    $edit = [
       'displays[page_1][weight]' => 2,
       'displays[block_1][weight]' => 1
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $view = Views::getView($view['id']);
     $displays = $view->storage->get('display');
@@ -92,17 +92,17 @@ public function testDisableDisplay() {
     $path_prefix = 'admin/structure/views/view/' . $view['id'] . '/edit';
 
     $this->drupalGet($path_prefix);
-    $this->assertFalse($this->xpath('//div[contains(@class, :class)]', array(':class' => 'views-display-disabled')), 'Make sure the disabled display css class does not appear after initial adding of a view.');
+    $this->assertFalse($this->xpath('//div[contains(@class, :class)]', [':class' => 'views-display-disabled']), 'Make sure the disabled display css class does not appear after initial adding of a view.');
 
     $this->assertFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-disable', '', 'Make sure the disable button is visible.');
     $this->assertNoFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-enable', '', 'Make sure the enable button is not visible.');
-    $this->drupalPostForm(NULL, array(), 'Disable Page');
-    $this->assertTrue($this->xpath('//div[contains(@class, :class)]', array(':class' => 'views-display-disabled')), 'Make sure the disabled display css class appears once the display is marked as such.');
+    $this->drupalPostForm(NULL, [], 'Disable Page');
+    $this->assertTrue($this->xpath('//div[contains(@class, :class)]', [':class' => 'views-display-disabled']), 'Make sure the disabled display css class appears once the display is marked as such.');
 
     $this->assertNoFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-disable', '', 'Make sure the disable button is not visible.');
     $this->assertFieldById('edit-displays-settings-settings-content-tab-content-details-top-actions-enable', '', 'Make sure the enable button is visible.');
-    $this->drupalPostForm(NULL, array(), 'Enable Page');
-    $this->assertFalse($this->xpath('//div[contains(@class, :class)]', array(':class' => 'views-display-disabled')), 'Make sure the disabled display css class does not appears once the display is enabled again.');
+    $this->drupalPostForm(NULL, [], 'Enable Page');
+    $this->assertFalse($this->xpath('//div[contains(@class, :class)]', [':class' => 'views-display-disabled']), 'Make sure the disabled display css class does not appears once the display is enabled again.');
   }
 
   /**
@@ -111,10 +111,10 @@ public function testDisableDisplay() {
   public function testDisplayPluginsAlter() {
     $definitions = Views::pluginManager('display')->getDefinitions();
 
-    $expected = array(
+    $expected = [
       'route_name' => 'entity.view.edit_form',
-      'route_parameters_names' => array('view' => 'id'),
-    );
+      'route_parameters_names' => ['view' => 'id'],
+    ];
 
     // Test the expected views_ui array exists on each definition.
     foreach ($definitions as $definition) {
@@ -136,16 +136,16 @@ public function testDisplayAreas() {
 
     $this->drupalGet('admin/structure/views/view/test_display/edit/display_no_area_test_1');
 
-    $areas = array(
+    $areas = [
       'header',
       'footer',
       'empty',
-    );
+    ];
 
     // Assert that the expected text is found in each area category.
     foreach ($areas as $type) {
-      $element = $this->xpath('//div[contains(@class, :class)]/div', array(':class' => $type));
-      $this->assertEqual((string) $element[0], SafeMarkup::format('The selected display type does not use @type plugins', array('@type' => $type)));
+      $element = $this->xpath('//div[contains(@class, :class)]/div', [':class' => $type]);
+      $this->assertEqual((string) $element[0], SafeMarkup::format('The selected display type does not use @type plugins', ['@type' => $type]));
     }
   }
 
@@ -159,28 +159,28 @@ public function testLinkDisplay() {
 
     // Test the link text displays 'None' and not 'Block 1'
     $this->drupalGet($path);
-    $result = $this->xpath("//a[contains(@href, :path)]", array(':path' => $link_display_path));
+    $result = $this->xpath("//a[contains(@href, :path)]", [':path' => $link_display_path]);
     $this->assertEqual($result[0], t('None'), 'Make sure that the link option summary shows "None" by default.');
 
     $this->drupalGet($link_display_path);
     $this->assertFieldChecked('edit-link-display-0');
 
     // Test the default radio option on the link display form.
-    $this->drupalPostForm($link_display_path, array('link_display' => 'page_1'), t('Apply'));
+    $this->drupalPostForm($link_display_path, ['link_display' => 'page_1'], t('Apply'));
     // The form redirects to the master display.
     $this->drupalGet($path);
 
-    $result = $this->xpath("//a[contains(@href, :path)]", array(':path' => $link_display_path));
+    $result = $this->xpath("//a[contains(@href, :path)]", [':path' => $link_display_path]);
     $this->assertEqual($result[0], 'Page', 'Make sure that the link option summary shows the right linked display.');
 
-    $this->drupalPostForm($link_display_path, array('link_display' => 'custom_url', 'link_url' => 'a-custom-url'), t('Apply'));
+    $this->drupalPostForm($link_display_path, ['link_display' => 'custom_url', 'link_url' => 'a-custom-url'], t('Apply'));
     // The form redirects to the master display.
     $this->drupalGet($path);
 
     $this->assertLink(t('Custom URL'), 0, 'The link option has custom URL as summary.');
 
     // Test the default link_url value for new display
-    $this->drupalPostForm(NULL, array(), t('Add Block'));
+    $this->drupalPostForm(NULL, [], t('Add Block'));
     $this->assertUrl('admin/structure/views/view/test_display/edit/block_2');
     $this->clickLink(t('Custom URL'));
     $this->assertFieldByName('link_url', 'a-custom-url');
@@ -190,7 +190,7 @@ public function testLinkDisplay() {
    * Tests contextual links on Views page displays.
    */
   public function testPageContextualLinks() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer views', 'access contextual links')));
+    $this->drupalLogin($this->drupalCreateUser(['administer views', 'access contextual links']));
     $view = View::load('test_display');
     $view->enable()->save();
     $this->container->get('router.builder')->rebuildIfNeeded();
@@ -200,12 +200,12 @@ public function testPageContextualLinks() {
     $this->drupalGet('test-display');
     $id = 'entity.view.edit_form:view=test_display:location=page&name=test_display&display_id=page_1&langcode=en';
     // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:assertContextualLinkPlaceHolder()
-    $this->assertRaw('<div' . new Attribute(array('data-contextual-id' => $id)) . '></div>', format_string('Contextual link placeholder with id @id exists.', array('@id' => $id)));
+    $this->assertRaw('<div' . new Attribute(['data-contextual-id' => $id]) . '></div>', format_string('Contextual link placeholder with id @id exists.', ['@id' => $id]));
 
     // Get server-rendered contextual links.
     // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:renderContextualLinks()
-    $post = array('ids[0]' => $id);
-    $response = $this->drupalPostWithFormat('contextual/render', 'json', $post, array('query' => array('destination' => 'test-display')));
+    $post = ['ids[0]' => $id];
+    $response = $this->drupalPostWithFormat('contextual/render', 'json', $post, ['query' => ['destination' => 'test-display']]);
     $this->assertResponse(200);
     $json = Json::decode($response);
     $this->assertIdentical($json[$id], '<ul class="contextual-links"><li class="entityviewedit-form"><a href="' . base_path() . 'admin/structure/views/view/test_display/edit/page_1">Edit view</a></li></ul>');
@@ -217,7 +217,7 @@ public function testPageContextualLinks() {
     $this->drupalGet('test-display');
     $id = 'entity.view.edit_form:view=test_display:location=page&name=test_display&display_id=page_1&langcode=en';
     // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:assertContextualLinkPlaceHolder()
-    $this->assertRaw('<div' . new Attribute(array('data-contextual-id' => $id)) . '></div>', format_string('Contextual link placeholder with id @id exists.', array('@id' => $id)));
+    $this->assertRaw('<div' . new Attribute(['data-contextual-id' => $id]) . '></div>', format_string('Contextual link placeholder with id @id exists.', ['@id' => $id]));
   }
 
   /**
@@ -229,14 +229,14 @@ public function testViewStatus() {
 
     // The view should initially have the enabled class on it's form wrapper.
     $this->drupalGet('admin/structure/views/view/' . $id);
-    $elements = $this->xpath('//div[contains(@class, :edit) and contains(@class, :status)]', array(':edit' => 'views-edit-view', ':status' => 'enabled'));
+    $elements = $this->xpath('//div[contains(@class, :edit) and contains(@class, :status)]', [':edit' => 'views-edit-view', ':status' => 'enabled']);
     $this->assertTrue($elements, 'The enabled class was found on the form wrapper');
 
     $view = Views::getView($id);
     $view->storage->disable()->save();
 
     $this->drupalGet('admin/structure/views/view/' . $id);
-    $elements = $this->xpath('//div[contains(@class, :edit) and contains(@class, :status)]', array(':edit' => 'views-edit-view', ':status' => 'disabled'));
+    $elements = $this->xpath('//div[contains(@class, :edit) and contains(@class, :status)]', [':edit' => 'views-edit-view', ':status' => 'disabled']);
     $this->assertTrue($elements, 'The disabled class was found on the form wrapper.');
   }
 
@@ -278,7 +278,7 @@ public function testActionLinks() {
     $display_title = "'<test>'";
     $this->drupalGet('admin/structure/views/view/test_display');
     $display_title_path = 'admin/structure/views/nojs/display/test_display/block_1/display_title';
-    $this->drupalPostForm($display_title_path, array('display_title' => $display_title), t('Apply'));
+    $this->drupalPostForm($display_title_path, ['display_title' => $display_title], t('Apply'));
 
     // Ensure that the title is escaped as expected.
     $this->assertEscaped($display_title);
diff --git a/core/modules/views_ui/src/Tests/DuplicateTest.php b/core/modules/views_ui/src/Tests/DuplicateTest.php
index a6948f0029447436af2e923496f4c9702541cf9b..1096ab4314ca49ffd9c22174700d7d3151c26501 100644
--- a/core/modules/views_ui/src/Tests/DuplicateTest.php
+++ b/core/modules/views_ui/src/Tests/DuplicateTest.php
@@ -24,7 +24,7 @@ public function testDuplicateView() {
     $random_view = $this->randomView();
 
     // Initialize array for duplicated view.
-    $view = array();
+    $view = [];
 
     // Generate random label and id for new view.
     $view['label'] = $this->randomMachineName(255);
@@ -34,7 +34,7 @@ public function testDuplicateView() {
     $this->drupalPostForm('admin/structure/views/view/' . $random_view['id'] . '/duplicate', $view, t('Duplicate'));
 
     // Assert that the page url is correct.
-    $this->assertUrl('admin/structure/views/view/' . $view['id'], array(), 'Make sure the view saving was successful and the browser got redirected to the edit page.');
+    $this->assertUrl('admin/structure/views/view/' . $view['id'], [], 'Make sure the view saving was successful and the browser got redirected to the edit page.');
 
     // Assert that the page title is correctly displayed.
     $this->assertText($view['label']);
diff --git a/core/modules/views_ui/src/Tests/ExposedFormUITest.php b/core/modules/views_ui/src/Tests/ExposedFormUITest.php
index 66280b1beb7b213452c8db736057df185bbeff63..d1e3a664a8472185a668a3ad908940d90f1ecb9c 100644
--- a/core/modules/views_ui/src/Tests/ExposedFormUITest.php
+++ b/core/modules/views_ui/src/Tests/ExposedFormUITest.php
@@ -16,12 +16,12 @@ class ExposedFormUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_exposed_admin_ui');
+  public static $testViews = ['test_exposed_admin_ui'];
 
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('node', 'views_ui', 'block', 'taxonomy', 'field_ui', 'datetime');
+  public static $modules = ['node', 'views_ui', 'block', 'taxonomy', 'field_ui', 'datetime'];
 
   /**
    * Array of error message strings raised by the grouped form.
@@ -35,8 +35,8 @@ class ExposedFormUITest extends UITestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalCreateContentType(array('type' => 'article'));
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'article']);
+    $this->drupalCreateContentType(['type' => 'page']);
 
     // Create some random nodes.
     for ($i = 0; $i < 5; $i++) {
@@ -53,7 +53,7 @@ protected function setUp() {
    * Tests the admin interface of exposed filter and sort items.
    */
   function testExposedAdminUi() {
-    $edit = array();
+    $edit = [];
 
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type');
     // Be sure that the button is called exposed.
@@ -78,12 +78,12 @@ function testExposedAdminUi() {
     $this->assertFieldById('edit-options-value-article', '', 'Checkbox for Article exists');
 
     // Check the validations of the filter handler.
-    $edit = array();
+    $edit = [];
     $edit['options[expose][identifier]'] = '';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
     $this->assertText(t('The identifier is required if the filter is exposed.'));
 
-    $edit = array();
+    $edit = [];
     $edit['options[expose][identifier]'] = 'value';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
     $this->assertText(t('This identifier is not allowed.'));
@@ -95,7 +95,7 @@ function testExposedAdminUi() {
 
     // Un-expose the filter.
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type');
-    $this->drupalPostForm(NULL, array(), t('Hide filter'));
+    $this->drupalPostForm(NULL, [], t('Hide filter'));
 
     // After Un-exposing the filter, Operator and Value should be shown again.
     $this->assertFieldById('edit-options-operator-in', '', 'Operator In exists after hide filter');
@@ -104,7 +104,7 @@ function testExposedAdminUi() {
     $this->assertFieldById('edit-options-value-article', '', 'Checkbox for Article exists after hide filter');
 
     // Click the Expose sort button.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/sort/created', $edit, t('Expose sort'));
     // Check the label of the expose button.
     $this->helperButtonHasLabel('edit-options-expose-button-button', t('Hide sort'));
@@ -135,7 +135,7 @@ function testExposedAdminUi() {
    * Tests the admin interface of exposed grouped filters.
    */
   function testGroupedFilterAdminUi() {
-    $edit = array();
+    $edit = [];
 
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type');
 
@@ -146,7 +146,7 @@ function testGroupedFilterAdminUi() {
 
     // Click the Grouped Filters button.
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type');
-    $this->drupalPostForm(NULL, array(), t('Grouped filters'));
+    $this->drupalPostForm(NULL, [], t('Grouped filters'));
 
     // After click on 'Grouped Filters', the standard operator and value should
     // not be displayed.
@@ -161,7 +161,7 @@ function testGroupedFilterAdminUi() {
 
     // Validate a single entry for a grouped filter.
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type');
-    $edit = array();
+    $edit = [];
     $edit["options[group_info][group_items][1][title]"] = 'Is Article';
     $edit["options[group_info][group_items][1][value][article]"] = 'article';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
@@ -170,7 +170,7 @@ function testGroupedFilterAdminUi() {
 
     // Validate multiple entries for grouped filters.
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type');
-    $edit = array();
+    $edit = [];
     $edit["options[group_info][group_items][1][title]"] = 'Is Article';
     $edit["options[group_info][group_items][1][value][article]"] = 'article';
     $edit["options[group_info][group_items][2][title]"] = 'Is Page';
@@ -179,28 +179,28 @@ function testGroupedFilterAdminUi() {
     $edit["options[group_info][group_items][3][value][article]"] = 'article';
     $edit["options[group_info][group_items][3][value][page]"] = 'page';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->assertUrl('admin/structure/views/view/test_exposed_admin_ui/edit/default', array(), 'Correct validation of the node type filter.');
+    $this->assertUrl('admin/structure/views/view/test_exposed_admin_ui/edit/default', [], 'Correct validation of the node type filter.');
     $this->assertNoGroupedFilterErrors();
 
     // Validate an "is empty" filter -- title without value is valid.
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/body_value');
-    $edit = array();
+    $edit = [];
     $edit["options[group_info][group_items][1][title]"] = 'No body';
     $edit["options[group_info][group_items][1][operator]"] = 'empty';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->assertUrl('admin/structure/views/view/test_exposed_admin_ui/edit/default', array(), 'The "empty" operator validates correctly.');
+    $this->assertUrl('admin/structure/views/view/test_exposed_admin_ui/edit/default', [], 'The "empty" operator validates correctly.');
     $this->assertNoGroupedFilterErrors();
 
     // Ensure the string "0" can be used as a value for numeric filters.
-    $this->drupalPostForm('admin/structure/views/nojs/add-handler/test_exposed_admin_ui/default/filter', array('name[node_field_data.nid]' => TRUE), t('Add and configure @handler', array('@handler' => t('filter criteria'))));
-    $this->drupalPostForm(NULL, array(), t('Expose filter'));
-    $this->drupalPostForm(NULL, array(), t('Grouped filters'));
-    $edit = array();
+    $this->drupalPostForm('admin/structure/views/nojs/add-handler/test_exposed_admin_ui/default/filter', ['name[node_field_data.nid]' => TRUE], t('Add and configure @handler', ['@handler' => t('filter criteria')]));
+    $this->drupalPostForm(NULL, [], t('Expose filter'));
+    $this->drupalPostForm(NULL, [], t('Grouped filters'));
+    $edit = [];
     $edit['options[group_info][group_items][1][title]'] = 'Testing zero';
     $edit['options[group_info][group_items][1][operator]'] = '>';
     $edit['options[group_info][group_items][1][value][value]'] = '0';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->assertUrl('admin/structure/views/view/test_exposed_admin_ui/edit/default', array(), 'A string "0" is a valid value.');
+    $this->assertUrl('admin/structure/views/view/test_exposed_admin_ui/edit/default', [], 'A string "0" is a valid value.');
     $this->assertNoGroupedFilterErrors();
 
     // Ensure "between" filters validate correctly.
@@ -210,14 +210,14 @@ function testGroupedFilterAdminUi() {
     $edit['options[group_info][group_items][1][value][min]'] = '0';
     $edit['options[group_info][group_items][1][value][max]'] = '10';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->assertUrl('admin/structure/views/view/test_exposed_admin_ui/edit/default', array(), 'The "between" filter validates correctly.');
+    $this->assertUrl('admin/structure/views/view/test_exposed_admin_ui/edit/default', [], 'The "between" filter validates correctly.');
     $this->assertNoGroupedFilterErrors();
   }
 
   public function testGroupedFilterAdminUiErrors() {
     // Select the empty operator without a title specified.
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/body_value');
-    $edit = array();
+    $edit = [];
     $edit["options[group_info][group_items][1][title]"] = '';
     $edit["options[group_info][group_items][1][operator]"] = 'empty';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
@@ -227,14 +227,14 @@ public function testGroupedFilterAdminUiErrors() {
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type');
     $this->drupalPostForm('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type', [], t('Expose filter'));
     $this->drupalPostForm('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type', [], t('Grouped filters'));
-    $edit = array();
+    $edit = [];
     $edit["options[group_info][group_items][1][title]"] = 'Is Article';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
     $this->assertText($this->groupFormUiErrors['missing_value']);
 
     // Specify a value without a title.
     $this->drupalGet('admin/structure/views/nojs/handler/test_exposed_admin_ui/default/filter/type');
-    $edit = array();
+    $edit = [];
     $edit["options[group_info][group_items][1][title]"] = '';
     $edit["options[group_info][group_items][1][value][article]"] = 'article';
     $this->drupalPostForm(NULL, $edit, t('Apply'));
diff --git a/core/modules/views_ui/src/Tests/FieldUITest.php b/core/modules/views_ui/src/Tests/FieldUITest.php
index 8c486d8b32ffaa7ddfaea552bcba20df8a78f935..4e873236996ee68a7c9bc6656e59f07f421346f9 100644
--- a/core/modules/views_ui/src/Tests/FieldUITest.php
+++ b/core/modules/views_ui/src/Tests/FieldUITest.php
@@ -18,7 +18,7 @@ class FieldUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests the UI of field handlers.
@@ -31,7 +31,7 @@ public function testFieldUI() {
 
     // Hides the field and check whether the hidden label is appended.
     $edit_handler_url = 'admin/structure/views/nojs/handler/test_view/default/field/name';
-    $this->drupalPostForm($edit_handler_url, array('options[exclude]' => TRUE), t('Apply'));
+    $this->drupalPostForm($edit_handler_url, ['options[exclude]' => TRUE], t('Apply'));
 
     $this->assertText('Views test: Name [' . t('hidden') . ']');
 
@@ -62,9 +62,9 @@ public function testFieldUI() {
     $this->assertNoLinkByHref($edit_groupby_url, 0, 'No aggregation link found.');
 
     // Enable aggregation on the view.
-    $edit = array(
+    $edit = [
       'group_by' => TRUE,
-    );
+    ];
     $this->drupalPostForm('/admin/structure/views/nojs/display/test_view/default/group_by', $edit, t('Apply'));
 
     $this->assertLinkByHref($edit_groupby_url, 0, 'Aggregation link found.');
@@ -81,7 +81,7 @@ public function testFieldUI() {
   public function testFieldLabel() {
     // Create a view with unformatted style and make sure the fields have no
     // labels by default.
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['description'] = $this->randomMachineName(16);
diff --git a/core/modules/views_ui/src/Tests/FilterBooleanWebTest.php b/core/modules/views_ui/src/Tests/FilterBooleanWebTest.php
index 668cc4c1de1116c5c4ecfbea9a69ddcc8a382289..a3e58d755eb7f0ec0dc54a197ea933475446c26f 100644
--- a/core/modules/views_ui/src/Tests/FilterBooleanWebTest.php
+++ b/core/modules/views_ui/src/Tests/FilterBooleanWebTest.php
@@ -15,22 +15,22 @@ class FilterBooleanWebTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests the filter boolean UI.
    */
   public function testFilterBooleanUI() {
-    $this->drupalPostForm('admin/structure/views/nojs/add-handler/test_view/default/filter', array('name[views_test_data.status]' => TRUE), t('Add and configure @handler', array('@handler' => t('filter criteria'))));
+    $this->drupalPostForm('admin/structure/views/nojs/add-handler/test_view/default/filter', ['name[views_test_data.status]' => TRUE], t('Add and configure @handler', ['@handler' => t('filter criteria')]));
 
     // Check the field widget label. 'title' should be used as a fallback.
     $result = $this->cssSelect('#edit-options-value--wrapper legend span');
     $this->assertEqual((string) $result[0], 'Status');
 
-    $this->drupalPostForm(NULL, array(), t('Expose filter'));
-    $this->drupalPostForm(NULL, array(), t('Grouped filters'));
+    $this->drupalPostForm(NULL, [], t('Expose filter'));
+    $this->drupalPostForm(NULL, [], t('Grouped filters'));
 
-    $edit = array();
+    $edit = [];
     $edit['options[group_info][group_items][1][title]'] = 'Published';
     $edit['options[group_info][group_items][1][operator]'] = '=';
     $edit['options[group_info][group_items][1][value]'] = 1;
@@ -56,7 +56,7 @@ public function testFilterBooleanUI() {
     $this->assertEqual(count($this->cssSelect('a.views-remove-link')), 3);
 
     // Test selecting a default and removing an item.
-    $edit = array();
+    $edit = [];
     $edit['options[group_info][default_group]'] = 2;
     $edit['options[group_info][group_items][3][remove]'] = 1;
     $this->drupalPostForm(NULL, $edit, t('Apply'));
diff --git a/core/modules/views_ui/src/Tests/FilterNumericWebTest.php b/core/modules/views_ui/src/Tests/FilterNumericWebTest.php
index 1964f1ea22f9fac47ec422d6be0ffc3f00e4593e..104d62f54da73f8da14eb8f92b0fbaff712b02e2 100644
--- a/core/modules/views_ui/src/Tests/FilterNumericWebTest.php
+++ b/core/modules/views_ui/src/Tests/FilterNumericWebTest.php
@@ -18,18 +18,18 @@ class FilterNumericWebTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests the filter numeric UI.
    */
   public function testFilterNumericUI() {
-    $this->drupalPostForm('admin/structure/views/nojs/add-handler/test_view/default/filter', array('name[views_test_data.age]' => TRUE), t('Add and configure @handler', array('@handler' => t('filter criteria'))));
+    $this->drupalPostForm('admin/structure/views/nojs/add-handler/test_view/default/filter', ['name[views_test_data.age]' => TRUE], t('Add and configure @handler', ['@handler' => t('filter criteria')]));
 
-    $this->drupalPostForm(NULL, array(), t('Expose filter'));
-    $this->drupalPostForm(NULL, array(), t('Grouped filters'));
+    $this->drupalPostForm(NULL, [], t('Expose filter'));
+    $this->drupalPostForm(NULL, [], t('Grouped filters'));
 
-    $edit = array();
+    $edit = [];
     $edit['options[group_info][group_items][1][title]'] = 'Old';
     $edit['options[group_info][group_items][1][operator]'] = '>';
     $edit['options[group_info][group_items][1][value][value]'] = 27;
@@ -48,17 +48,17 @@ public function testFilterNumericUI() {
       $this->assertFieldByName($name, $value);
     }
 
-    $this->drupalPostForm('admin/structure/views/view/test_view', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/views/view/test_view', [], t('Save'));
     $this->assertConfigSchemaByName('views.view.test_view');
 
     // Test that the exposed filter works as expected.
-    $this->drupalPostForm(NULL, array(), t('Update preview'));
+    $this->drupalPostForm(NULL, [], t('Update preview'));
     $this->assertText('John');
     $this->assertText('Paul');
     $this->assertText('Ringo');
     $this->assertText('George');
     $this->assertText('Meredith');
-    $this->drupalPostForm(NULL, array('age' => '2'), t('Update preview'));
+    $this->drupalPostForm(NULL, ['age' => '2'], t('Update preview'));
     $this->assertText('John');
     $this->assertText('Paul');
     $this->assertNoText('Ringo');
@@ -67,21 +67,21 @@ public function testFilterNumericUI() {
 
     // Change the filter to a single filter to test the schema when the operator
     // is not exposed.
-    $this->drupalPostForm('admin/structure/views/nojs/handler/test_view/default/filter/age', array(), t('Single filter'));
-    $edit = array();
+    $this->drupalPostForm('admin/structure/views/nojs/handler/test_view/default/filter/age', [], t('Single filter'));
+    $edit = [];
     $edit['options[value][value]'] = 25;
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->drupalPostForm('admin/structure/views/view/test_view', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/views/view/test_view', [], t('Save'));
     $this->assertConfigSchemaByName('views.view.test_view');
 
     // Test that the filter works as expected.
-    $this->drupalPostForm(NULL, array(), t('Update preview'));
+    $this->drupalPostForm(NULL, [], t('Update preview'));
     $this->assertText('John');
     $this->assertNoText('Paul');
     $this->assertNoText('Ringo');
     $this->assertNoText('George');
     $this->assertNoText('Meredith');
-    $this->drupalPostForm(NULL, array('age' => '26'), t('Update preview'));
+    $this->drupalPostForm(NULL, ['age' => '26'], t('Update preview'));
     $this->assertNoText('John');
     $this->assertText('Paul');
     $this->assertNoText('Ringo');
@@ -91,17 +91,17 @@ public function testFilterNumericUI() {
     // Change the filter to a 'between' filter to test if the label and
     // description are set for the 'minimum' filter element.
     $this->drupalGet('admin/structure/views/nojs/handler/test_view/default/filter/age');
-    $edit = array();
+    $edit = [];
     $edit['options[expose][label]'] = 'Age between';
     $edit['options[expose][description]'] = 'Description of the exposed filter';
     $edit['options[operator]'] = 'between';
     $edit['options[value][min]'] = 26;
     $edit['options[value][max]'] = 28;
     $this->drupalPostForm(NULL, $edit, t('Apply'));
-    $this->drupalPostForm('admin/structure/views/view/test_view', array(), t('Save'));
+    $this->drupalPostForm('admin/structure/views/view/test_view', [], t('Save'));
     $this->assertConfigSchemaByName('views.view.test_view');
 
-    $this->drupalPostForm(NULL, array(), t('Update preview'));
+    $this->drupalPostForm(NULL, [], t('Update preview'));
     // Check the max field label.
     $this->assertRaw('<label for="edit-age-max">And</label>', 'Max field label found');
     $this->assertRaw('<label for="edit-age-min">Age between</label>', 'Min field label found');
diff --git a/core/modules/views_ui/src/Tests/FilterUITest.php b/core/modules/views_ui/src/Tests/FilterUITest.php
index 371800f841d8453eee0af4714f286a44a87b3d97..1197fc6e022eb3f5f506804280db3c244406d4bf 100644
--- a/core/modules/views_ui/src/Tests/FilterUITest.php
+++ b/core/modules/views_ui/src/Tests/FilterUITest.php
@@ -17,21 +17,21 @@ class FilterUITest extends ViewTestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_filter_in_operator_ui', 'test_filter_groups');
+  public static $testViews = ['test_filter_in_operator_ui', 'test_filter_groups'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'node');
+  public static $modules = ['views_ui', 'node'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     $this->enableViewsTestModule();
   }
 
@@ -39,7 +39,7 @@ protected function setUp() {
    * Tests that an option for a filter is saved as expected from the UI.
    */
   public function testFilterInOperatorUi() {
-    $admin_user = $this->drupalCreateUser(array('administer views', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer views', 'administer site configuration']);
     $this->drupalLogin($admin_user);
 
     $path = 'admin/structure/views/nojs/handler/test_filter_in_operator_ui/default/filter/type';
@@ -48,9 +48,9 @@ public function testFilterInOperatorUi() {
     $this->assertFieldByName('options[expose][reduce]', FALSE);
 
     // Select "Limit list to selected items" option and apply.
-    $edit = array(
+    $edit = [
       'options[expose][reduce]' => TRUE,
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Apply'));
 
     // Verifies that the option was saved as expected.
@@ -62,7 +62,7 @@ public function testFilterInOperatorUi() {
    * Tests the filters from the UI.
    */
   public function testFiltersUI() {
-    $admin_user = $this->drupalCreateUser(array('administer views', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer views', 'administer site configuration']);
     $this->drupalLogin($admin_user);
 
     $this->drupalGet('admin/structure/views/view/test_filter_groups');
@@ -94,28 +94,28 @@ public function testFiltersUI() {
    * Tests the identifier settings and restrictions.
    */
   public function testFilterIdentifier() {
-    $admin_user = $this->drupalCreateUser(array('administer views', 'administer site configuration'));
+    $admin_user = $this->drupalCreateUser(['administer views', 'administer site configuration']);
     $this->drupalLogin($admin_user);
     $path = 'admin/structure/views/nojs/handler/test_filter_in_operator_ui/default/filter/type';
 
     // Set an empty identifier.
-    $edit = array(
+    $edit = [
       'options[expose][identifier]' => '',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Apply'));
     $this->assertText('The identifier is required if the filter is exposed.');
 
     // Set the identifier to 'value'.
-    $edit = array(
+    $edit = [
       'options[expose][identifier]' => 'value',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Apply'));
     $this->assertText('This identifier is not allowed.');
 
     // Set the identifier to a value with a restricted character.
-    $edit = array(
+    $edit = [
       'options[expose][identifier]' => 'value value',
-    );
+    ];
     $this->drupalPostForm($path, $edit, t('Apply'));
     $this->assertText('This identifier has illegal characters.');
   }
diff --git a/core/modules/views_ui/src/Tests/GroupByTest.php b/core/modules/views_ui/src/Tests/GroupByTest.php
index 8d0ae3a91b33cede9911e0d0eff8917d351c78ce..1bf8f01929d8d447961b04bb6a09d78a16c01255 100644
--- a/core/modules/views_ui/src/Tests/GroupByTest.php
+++ b/core/modules/views_ui/src/Tests/GroupByTest.php
@@ -14,7 +14,7 @@ class GroupByTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_views_groupby_save');
+  public static $testViews = ['test_views_groupby_save'];
 
   /**
    * Tests whether basic saving works.
@@ -28,18 +28,18 @@ function testGroupBySave() {
     $this->assertNoLinkByHref($edit_groupby_url, 0, 'No aggregation link found.');
 
     // Enable aggregation on the view.
-    $edit = array(
+    $edit = [
       'group_by' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_views_groupby_save/default/group_by', $edit, t('Apply'));
 
     $this->assertLinkByHref($edit_groupby_url, 0, 'Aggregation link found.');
 
     // Change the groupby type in the UI.
-    $this->drupalPostForm($edit_groupby_url, array('options[group_type]' => 'count'), t('Apply'));
+    $this->drupalPostForm($edit_groupby_url, ['options[group_type]' => 'count'], t('Apply'));
     $this->assertLink('COUNT(Views test: ID)', 0, 'The count setting is displayed in the UI');
 
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $view = $this->container->get('entity.manager')->getStorage('view')->load('test_views_groupby_save');
     $display = $view->getDisplay('default');
diff --git a/core/modules/views_ui/src/Tests/HandlerTest.php b/core/modules/views_ui/src/Tests/HandlerTest.php
index bc61a37056f51720ce8220156f0c005b1af03a74..8fb29f97c89435704a2e3cc480bee828cfc93d8a 100644
--- a/core/modules/views_ui/src/Tests/HandlerTest.php
+++ b/core/modules/views_ui/src/Tests/HandlerTest.php
@@ -19,14 +19,14 @@ class HandlerTest extends UITestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('node_test_views');
+  public static $modules = ['node_test_views'];
 
   /**
    * Views used by this test.
    *
    * @var array
    */
-  public static $testViews = array('test_view_empty', 'test_view_broken', 'node', 'test_node_view');
+  public static $testViews = ['test_view_empty', 'test_view_broken', 'node', 'test_node_view'];
 
   /**
    * {@inheritdoc}
@@ -35,7 +35,7 @@ protected function setUp() {
     parent::setUp();
 
     $this->drupalPlaceBlock('page_title_block');
-    ViewTestData::createTestViews(get_class($this), array('node_test_views'));
+    ViewTestData::createTestViews(get_class($this), ['node_test_views']);
   }
 
   /**
@@ -46,13 +46,13 @@ protected function setUp() {
   protected function schemaDefinition() {
     $schema = parent::schemaDefinition();
 
-    $schema['views_test_data']['fields']['uid'] = array(
+    $schema['views_test_data']['fields']['uid'] = [
       'description' => "The {users}.uid of the author of the beatle entry.",
       'type' => 'int',
       'unsigned' => TRUE,
       'not null' => TRUE,
       'default' => 0
-    );
+    ];
 
     return $schema;
   }
@@ -66,15 +66,15 @@ protected function schemaDefinition() {
    */
   protected function viewsData() {
     $data = parent::viewsData();
-    $data['views_test_data']['uid'] = array(
+    $data['views_test_data']['uid'] = [
       'title' => t('UID'),
       'help' => t('The test data UID'),
-      'relationship' => array(
+      'relationship' => [
         'id' => 'standard',
         'base' => 'users_field_data',
         'base field' => 'uid'
-      )
-    );
+      ]
+    ];
 
     // Create a dummy field with no help text.
     $data['views_test_data']['no_help'] = $data['views_test_data']['name'];
@@ -95,43 +95,43 @@ public function testUICRUD() {
       $add_handler_url = "admin/structure/views/nojs/add-handler/test_view_empty/default/$type";
 
       // Area handler types need to use a different handler.
-      if (in_array($type, array('header', 'footer', 'empty'))) {
-        $this->drupalPostForm($add_handler_url, array('name[views.area]' => TRUE), t('Add and configure @handler', array('@handler' => $type_info['ltitle'])));
+      if (in_array($type, ['header', 'footer', 'empty'])) {
+        $this->drupalPostForm($add_handler_url, ['name[views.area]' => TRUE], t('Add and configure @handler', ['@handler' => $type_info['ltitle']]));
         $id = 'area';
         $edit_handler_url = "admin/structure/views/nojs/handler/test_view_empty/default/$type/$id";
       }
       elseif ($type == 'relationship') {
-        $this->drupalPostForm($add_handler_url, array('name[views_test_data.uid]' => TRUE), t('Add and configure @handler', array('@handler' => $type_info['ltitle'])));
+        $this->drupalPostForm($add_handler_url, ['name[views_test_data.uid]' => TRUE], t('Add and configure @handler', ['@handler' => $type_info['ltitle']]));
         $id = 'uid';
         $edit_handler_url = "admin/structure/views/nojs/handler/test_view_empty/default/$type/$id";
       }
       else {
-        $this->drupalPostForm($add_handler_url, array('name[views_test_data.job]' => TRUE), t('Add and configure @handler', array('@handler' => $type_info['ltitle'])));
+        $this->drupalPostForm($add_handler_url, ['name[views_test_data.job]' => TRUE], t('Add and configure @handler', ['@handler' => $type_info['ltitle']]));
         $id = 'job';
         $edit_handler_url = "admin/structure/views/nojs/handler/test_view_empty/default/$type/$id";
       }
 
-      $this->assertUrl($edit_handler_url, array(), 'The user got redirected to the handler edit form.');
+      $this->assertUrl($edit_handler_url, [], 'The user got redirected to the handler edit form.');
       $random_label = $this->randomMachineName();
-      $this->drupalPostForm(NULL, array('options[admin_label]' => $random_label), t('Apply'));
+      $this->drupalPostForm(NULL, ['options[admin_label]' => $random_label], t('Apply'));
 
-      $this->assertUrl('admin/structure/views/view/test_view_empty/edit/default', array(), 'The user got redirected to the views edit form.');
+      $this->assertUrl('admin/structure/views/view/test_view_empty/edit/default', [], 'The user got redirected to the views edit form.');
 
       $this->assertLinkByHref($edit_handler_url, 0, 'The handler edit link appears in the UI.');
-      $links = $this->xpath('//a[starts-with(normalize-space(text()), :label)]', array(':label' => $random_label));
+      $links = $this->xpath('//a[starts-with(normalize-space(text()), :label)]', [':label' => $random_label]);
       $this->assertTrue(isset($links[0]), 'The handler edit link has the right label');
 
       // Save the view and have a look whether the handler was added as expected.
-      $this->drupalPostForm(NULL, array(), t('Save'));
+      $this->drupalPostForm(NULL, [], t('Save'));
       $view = $this->container->get('entity.manager')->getStorage('view')->load('test_view_empty');
       $display = $view->getDisplay('default');
       $this->assertTrue(isset($display['display_options'][$type_info['plural']][$id]), 'Ensure the field was added to the view itself.');
 
       // Remove the item and check that it's removed
-      $this->drupalPostForm($edit_handler_url, array(), t('Remove'));
+      $this->drupalPostForm($edit_handler_url, [], t('Remove'));
       $this->assertNoLinkByHref($edit_handler_url, 0, 'The handler edit link does not appears in the UI after removing.');
 
-      $this->drupalPostForm(NULL, array(), t('Save'));
+      $this->drupalPostForm(NULL, [], t('Save'));
       $view = $this->container->get('entity.manager')->getStorage('view')->load('test_view_empty');
       $display = $view->getDisplay('default');
       $this->assertFalse(isset($display['display_options'][$type_info['plural']][$id]), 'Ensure the field was removed from the view itself.');
@@ -140,19 +140,19 @@ public function testUICRUD() {
     // Test adding a field of the user table using the uid relationship.
     $type_info = $handler_types['relationship'];
     $add_handler_url = "admin/structure/views/nojs/add-handler/test_view_empty/default/relationship";
-    $this->drupalPostForm($add_handler_url, array('name[views_test_data.uid]' => TRUE), t('Add and configure @handler', array('@handler' => $type_info['ltitle'])));
+    $this->drupalPostForm($add_handler_url, ['name[views_test_data.uid]' => TRUE], t('Add and configure @handler', ['@handler' => $type_info['ltitle']]));
 
     $add_handler_url = "admin/structure/views/nojs/add-handler/test_view_empty/default/field";
     $type_info = $handler_types['field'];
-    $this->drupalPostForm($add_handler_url, array('name[users_field_data.name]' => TRUE), t('Add and configure @handler', array('@handler' => $type_info['ltitle'])));
+    $this->drupalPostForm($add_handler_url, ['name[users_field_data.name]' => TRUE], t('Add and configure @handler', ['@handler' => $type_info['ltitle']]));
     $id = 'name';
     $edit_handler_url = "admin/structure/views/nojs/handler/test_view_empty/default/field/$id";
 
-    $this->assertUrl($edit_handler_url, array(), 'The user got redirected to the handler edit form.');
+    $this->assertUrl($edit_handler_url, [], 'The user got redirected to the handler edit form.');
     $this->assertFieldByName('options[relationship]', 'uid', 'Ensure the relationship select is filled with the UID relationship.');
-    $this->drupalPostForm(NULL, array(), t('Apply'));
+    $this->drupalPostForm(NULL, [], t('Apply'));
 
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
     $view = $this->container->get('entity.manager')->getStorage('view')->load('test_view_empty');
     $display = $view->getDisplay('default');
     $this->assertTrue(isset($display['display_options'][$type_info['plural']][$id]), 'Ensure the field was added to the view itself.');
@@ -203,8 +203,8 @@ public function testBrokenHandlers() {
 
       $href = "admin/structure/views/nojs/handler/test_view_broken/default/$type/id_broken";
 
-      $result = $this->xpath('//a[contains(@href, :href)]', array(':href' => $href));
-      $this->assertEqual(count($result), 1, SafeMarkup::format('Handler (%type) edit link found.', array('%type' => $type)));
+      $result = $this->xpath('//a[contains(@href, :href)]', [':href' => $href]);
+      $this->assertEqual(count($result), 1, SafeMarkup::format('Handler (%type) edit link found.', ['%type' => $type]));
 
       $text = 'Broken/missing handler';
 
@@ -223,7 +223,7 @@ public function testBrokenHandlers() {
       ];
 
       foreach ($original_configuration as $key => $value) {
-        $this->assertText(SafeMarkup::format('@key: @value', array('@key' => $key, '@value' => $value)));
+        $this->assertText(SafeMarkup::format('@key: @value', ['@key' => $key, '@value' => $value]));
       }
     }
   }
diff --git a/core/modules/views_ui/src/Tests/NewViewConfigSchemaTest.php b/core/modules/views_ui/src/Tests/NewViewConfigSchemaTest.php
index a01e24bda6a07c537ba4e9e974c936c7ceffeadf..3318f0b640ae9e8d53ba13b931768454773091dd 100644
--- a/core/modules/views_ui/src/Tests/NewViewConfigSchemaTest.php
+++ b/core/modules/views_ui/src/Tests/NewViewConfigSchemaTest.php
@@ -16,16 +16,16 @@ class NewViewConfigSchemaTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'node', 'comment', 'file', 'taxonomy', 'dblog', 'aggregator');
+  public static $modules = ['views_ui', 'node', 'comment', 'file', 'taxonomy', 'dblog', 'aggregator'];
 
   /**
    * Tests creating brand new views.
    */
   public function testNewViews() {
-    $this->drupalLogin($this->drupalCreateUser(array('administer views')));
+    $this->drupalLogin($this->drupalCreateUser(['administer views']));
 
     // Create views with all core Views wizards.
-    $wizards = array(
+    $wizards = [
       // Wizard with their own classes.
       'node',
       'node_revision',
@@ -37,9 +37,9 @@ public function testNewViews() {
       // Standard derivative classes.
       'standard:aggregator_feed',
       'standard:aggregator_item',
-    );
+    ];
     foreach ($wizards as $wizard_key) {
-      $edit = array();
+      $edit = [];
       $edit['label'] = $this->randomString();
       $edit['id'] = strtolower($this->randomMachineName());
       $edit['show[wizard_key]'] = $wizard_key;
diff --git a/core/modules/views_ui/src/Tests/OverrideDisplaysTest.php b/core/modules/views_ui/src/Tests/OverrideDisplaysTest.php
index 98576ad3b30142fdd9e96acf53a24991116fc501..fdd73e130221ef8be3dba1d292e22ec22d87ece5 100644
--- a/core/modules/views_ui/src/Tests/OverrideDisplaysTest.php
+++ b/core/modules/views_ui/src/Tests/OverrideDisplaysTest.php
@@ -33,15 +33,15 @@ function testOverrideDisplays() {
     // same (empty) title in the views wizard, we expect the wizard to have set
     // things up so that they both inherit from the default display, and we
     // therefore only need to change that to have it take effect for both.
-    $edit = array();
+    $edit = [];
     $edit['title'] = $original_title = $this->randomMachineName(16);
     $edit['override[dropdown]'] = 'default';
     $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_1/title", $edit, t('Apply'));
-    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/page_1", array(), t('Save'));
+    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/page_1", [], t('Save'));
 
     // Add a node that will appear in the view, so that the block will actually
     // be displayed.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     $this->drupalCreateNode();
 
     // Make sure the title appears in the page.
@@ -63,11 +63,11 @@ function testOverrideDisplays() {
 
     // Change the title for the page display only, and make sure that the
     // original title still appears on the page.
-    $edit = array();
+    $edit = [];
     $edit['title'] = $new_title = $this->randomMachineName(16);
     $edit['override[dropdown]'] = 'page_1';
     $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_1/title", $edit, t('Apply'));
-    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/page_1", array(), t('Save'));
+    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/page_1", [], t('Save'));
     $this->drupalGet($view_path);
     $this->assertResponse(200);
     $this->assertText($new_title);
@@ -95,7 +95,7 @@ function testWizardMixedDefaultOverriddenDisplays() {
 
     // Add a node that will appear in the view, so that the block will actually
     // be displayed.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     $this->drupalCreateNode();
 
     // Make sure that the feed, page and block all start off with the correct
@@ -117,14 +117,14 @@ function testWizardMixedDefaultOverriddenDisplays() {
     // Put the block into the first sidebar region, and make sure it will not
     // display on the view's page display (since we will be searching for the
     // presence/absence of the view's title in both the page and the block).
-    $this->drupalPlaceBlock("views_block:{$view['id']}-block_1", array(
-      'visibility' => array(
-        'request_path' => array(
+    $this->drupalPlaceBlock("views_block:{$view['id']}-block_1", [
+      'visibility' => [
+        'request_path' => [
           'pages' => '/' . $view['page[path]'],
           'negate' => TRUE,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     $this->drupalGet('');
     $this->assertText($view['block[title]']);
@@ -132,10 +132,10 @@ function testWizardMixedDefaultOverriddenDisplays() {
 
     // Edit the page and change the title. This should automatically change
     // the feed's title also, but not the block.
-    $edit = array();
+    $edit = [];
     $edit['title'] = $new_default_title = $this->randomMachineName(16);
     $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/page_1/title", $edit, t('Apply'));
-    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/page_1", array(), t('Save'));
+    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/page_1", [], t('Save'));
     $this->drupalGet($view['page[path]']);
     $this->assertResponse(200);
     $this->assertText($new_default_title);
@@ -153,10 +153,10 @@ function testWizardMixedDefaultOverriddenDisplays() {
 
     // Edit the block and change the title. This should automatically change
     // the block title only, and leave the defaults alone.
-    $edit = array();
+    $edit = [];
     $edit['title'] = $new_block_title = $this->randomMachineName(16);
     $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/block_1/title", $edit, t('Apply'));
-    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/block_1", array(), t('Save'));
+    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/block_1", [], t('Save'));
     $this->drupalGet($view['page[path]']);
     $this->assertResponse(200);
     $this->assertText($new_default_title);
@@ -187,12 +187,12 @@ function testRevertAllDisplays() {
 
     // Revert the title of the block to the default ones, but submit some new
     // values to be sure that the new value is not stored.
-    $edit = array();
+    $edit = [];
     $edit['title'] = $new_block_title = $this->randomMachineName();
     $edit['override[dropdown]'] = 'default_revert';
 
     $this->drupalPostForm("admin/structure/views/nojs/display/{$view['id']}/block_1/title", $edit, t('Apply'));
-    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/block_1", array(), t('Save'));
+    $this->drupalPostForm("admin/structure/views/view/{$view['id']}/edit/block_1", [], t('Save'));
     $this->assertText($view['page[title]']);
   }
 
diff --git a/core/modules/views_ui/src/Tests/PreviewTest.php b/core/modules/views_ui/src/Tests/PreviewTest.php
index d2dcd121936649cc36bc755e8dfe64b1ec643ba6..48e0ada2a9fc81d4e2ba7cc7db387e280f878463 100644
--- a/core/modules/views_ui/src/Tests/PreviewTest.php
+++ b/core/modules/views_ui/src/Tests/PreviewTest.php
@@ -17,23 +17,23 @@ class PreviewTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_preview', 'test_preview_error', 'test_pager_full', 'test_mini_pager', 'test_click_sort');
+  public static $testViews = ['test_preview', 'test_preview_error', 'test_pager_full', 'test_mini_pager', 'test_click_sort'];
 
   /**
    * Tests contextual links in the preview form.
    */
   public function testPreviewContextual() {
-    \Drupal::service('module_installer')->install(array('contextual'));
+    \Drupal::service('module_installer')->install(['contextual']);
     $this->resetAll();
 
     $this->drupalGet('admin/structure/views/view/test_preview/edit');
     $this->assertResponse(200);
-    $this->drupalPostForm(NULL, $edit = array(), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = [], t('Update preview'));
 
-    $elements = $this->xpath('//div[@id="views-live-preview"]//ul[contains(@class, :ul-class)]/li[contains(@class, :li-class)]', array(':ul-class' => 'contextual-links', ':li-class' => 'filter-add'));
+    $elements = $this->xpath('//div[@id="views-live-preview"]//ul[contains(@class, :ul-class)]/li[contains(@class, :li-class)]', [':ul-class' => 'contextual-links', ':li-class' => 'filter-add']);
     $this->assertEqual(count($elements), 1, 'The contextual link to add a new field is shown.');
 
-    $this->drupalPostForm(NULL, $edit = array('view_args' => '100'), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = ['view_args' => '100'], t('Update preview'));
 
     // Test that area text and exposed filters are present and rendered.
     $this->assertFieldByName('id', NULL, 'ID exposed filter field found.');
@@ -49,19 +49,19 @@ function testPreviewUI() {
     $this->drupalGet('admin/structure/views/view/test_preview/edit');
     $this->assertResponse(200);
 
-    $this->drupalPostForm(NULL, $edit = array(), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = [], t('Update preview'));
 
     $elements = $this->xpath('//div[@class = "view-content"]/div[contains(@class, views-row)]');
     $this->assertEqual(count($elements), 5);
 
     // Filter just the first result.
-    $this->drupalPostForm(NULL, $edit = array('view_args' => '1'), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = ['view_args' => '1'], t('Update preview'));
 
     $elements = $this->xpath('//div[@class = "view-content"]/div[contains(@class, views-row)]');
     $this->assertEqual(count($elements), 1);
 
     // Filter for no results.
-    $this->drupalPostForm(NULL, $edit = array('view_args' => '100'), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = ['view_args' => '100'], t('Update preview'));
 
     $elements = $this->xpath('//div[@class = "view-content"]/div[contains(@class, views-row)]');
     $this->assertEqual(count($elements), 0);
@@ -73,7 +73,7 @@ function testPreviewUI() {
     $this->assertText('Test empty text', 'Rendered empty text found.');
 
     // Test feed preview.
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['page[create]'] = 1;
@@ -83,7 +83,7 @@ function testPreviewUI() {
     $view['page[feed_properties][path]'] = $this->randomMachineName(16);
     $this->drupalPostForm('admin/structure/views/add', $view, t('Save and edit'));
     $this->clickLink(t('Feed'));
-    $this->drupalPostForm(NULL, array(), t('Update preview'));
+    $this->drupalPostForm(NULL, [], t('Update preview'));
     $result = $this->xpath('//div[@id="views-live-preview"]/pre');
     $this->assertTrue(strpos($result[0], '<title>' . $view['page[title]'] . '</title>'), 'The Feed RSS preview was rendered.');
 
@@ -92,7 +92,7 @@ function testPreviewUI() {
     $settings = \Drupal::configFactory()->getEditable('views.settings');
     $settings->set('ui.show.performance_statistics', TRUE)->save();
     $this->drupalGet('admin/structure/views/view/test_preview/edit');
-    $this->drupalPostForm(NULL, $edit = array('view_args' => '100'), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = ['view_args' => '100'], t('Update preview'));
     $this->assertText(t('Query build time'));
     $this->assertText(t('Query execute time'));
     $this->assertText(t('View render time'));
@@ -100,7 +100,7 @@ function testPreviewUI() {
 
     // Statistics and query.
     $settings->set('ui.show.sql_query.enabled', TRUE)->save();
-    $this->drupalPostForm(NULL, $edit = array('view_args' => '100'), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = ['view_args' => '100'], t('Update preview'));
     $this->assertText(t('Query build time'));
     $this->assertText(t('Query execute time'));
     $this->assertText(t('View render time'));
@@ -112,7 +112,7 @@ function testPreviewUI() {
 
     // Test that statistics and query rendered below the preview.
     $settings->set('ui.show.sql_query.where', 'below')->save();
-    $this->drupalPostForm(NULL, $edit = array('view_args' => '100'), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = ['view_args' => '100'], t('Update preview'));
     $this->assertTrue(strpos($this->getRawContent(), 'view-test-preview') < strpos($this->getRawContent(), 'views-query-info'), 'Statistics shown below the preview.');
   }
 
@@ -124,7 +124,7 @@ function testPreviewUI() {
    * @see https://www.drupal.org/node/2452659
    */
   public function testTaxonomyAJAX() {
-    \Drupal::service('module_installer')->install(array('taxonomy'));
+    \Drupal::service('module_installer')->install(['taxonomy']);
     $this->getPreviewAJAX('taxonomy_term', 'page_1', 0);
   }
 
@@ -134,7 +134,7 @@ public function testTaxonomyAJAX() {
   public function testPreviewWithPagersUI() {
 
     // Create 11 nodes and make sure that everyone is returned.
-    $this->drupalCreateContentType(array('type' => 'page'));
+    $this->drupalCreateContentType(['type' => 'page']);
     for ($i = 0; $i < 11; $i++) {
       $this->drupalCreateNode();
     }
@@ -143,7 +143,7 @@ public function testPreviewWithPagersUI() {
     $this->getPreviewAJAX('test_pager_full', 'default', 5);
 
     // Test that the pager is present and rendered.
-    $elements = $this->xpath('//ul[contains(@class, :class)]/li', array(':class' => 'pager__items'));
+    $elements = $this->xpath('//ul[contains(@class, :class)]/li', [':class' => 'pager__items']);
     $this->assertTrue(!empty($elements), 'Full pager found.');
 
     // Verify elements and links to pages.
@@ -165,11 +165,11 @@ public function testPreviewWithPagersUI() {
     $this->assertTrue($elements[4]->a, 'Link to last page found.');
 
     // Navigate to next page.
-    $elements = $this->xpath('//li[contains(@class, :class)]/a', array(':class' => 'pager__item--next'));
+    $elements = $this->xpath('//li[contains(@class, :class)]/a', [':class' => 'pager__item--next']);
     $this->clickPreviewLinkAJAX($elements[0]['href'], 5);
 
     // Test that the pager is present and rendered.
-    $elements = $this->xpath('//ul[contains(@class, :class)]/li', array(':class' => 'pager__items'));
+    $elements = $this->xpath('//ul[contains(@class, :class)]/li', [':class' => 'pager__items']);
     $this->assertTrue(!empty($elements), 'Full pager found.');
 
     // Verify elements and links to pages.
@@ -201,7 +201,7 @@ public function testPreviewWithPagersUI() {
     $this->getPreviewAJAX('test_mini_pager', 'default', 3);
 
     // Test that the pager is present and rendered.
-    $elements = $this->xpath('//ul[contains(@class, :class)]/li', array(':class' => 'pager__items'));
+    $elements = $this->xpath('//ul[contains(@class, :class)]/li', [':class' => 'pager__items']);
     $this->assertTrue(!empty($elements), 'Mini pager found.');
 
     // Verify elements and links to pages.
@@ -213,11 +213,11 @@ public function testPreviewWithPagersUI() {
     $this->assertTrue($elements[1]->a, 'Link to next page found.');
 
     // Navigate to next page.
-    $elements = $this->xpath('//li[contains(@class, :class)]/a', array(':class' => 'pager__item--next'));
+    $elements = $this->xpath('//li[contains(@class, :class)]/a', [':class' => 'pager__item--next']);
     $this->clickPreviewLinkAJAX($elements[0]['href'], 3);
 
     // Test that the pager is present and rendered.
-    $elements = $this->xpath('//ul[contains(@class, :class)]/li', array(':class' => 'pager__items'));
+    $elements = $this->xpath('//ul[contains(@class, :class)]/li', [':class' => 'pager__items']);
     $this->assertTrue(!empty($elements), 'Mini pager found.');
 
     // Verify elements and links to pages.
@@ -237,17 +237,17 @@ public function testPreviewWithPagersUI() {
    * Tests the additional information query info area.
    */
   public function testPreviewAdditionalInfo() {
-    \Drupal::service('module_installer')->install(array('views_ui_test'));
+    \Drupal::service('module_installer')->install(['views_ui_test']);
     $this->resetAll();
 
     $this->drupalGet('admin/structure/views/view/test_preview/edit');
     $this->assertResponse(200);
 
-    $this->drupalPostForm(NULL, $edit = array(), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = [], t('Update preview'));
 
     // Check for implementation of hook_views_preview_info_alter().
     // @see views_ui_test.module
-    $elements = $this->xpath('//div[@id="views-live-preview"]/div[contains(@class, views-query-info)]//td[text()=:text]', array(':text' => t('Test row count')));
+    $elements = $this->xpath('//div[@id="views-live-preview"]/div[contains(@class, views-query-info)]//td[text()=:text]', [':text' => t('Test row count')]);
     $this->assertEqual(count($elements), 1, 'Views Query Preview Info area altered.');
     // Check that additional assets are attached.
     $this->assertTrue(strpos($this->getDrupalSettings()['ajaxPageState']['libraries'], 'views_ui_test/views_ui_test.test') !== FALSE, 'Attached library found.');
@@ -261,7 +261,7 @@ public function testPreviewError() {
     $this->drupalGet('admin/structure/views/view/test_preview_error/edit');
     $this->assertResponse(200);
 
-    $this->drupalPostForm(NULL, $edit = array(), t('Update preview'));
+    $this->drupalPostForm(NULL, $edit = [], t('Update preview'));
 
     $this->assertText('Unable to preview due to validation errors.', 'Preview error text found.');
   }
@@ -275,7 +275,7 @@ public function testPreviewSortLink() {
     $this->getPreviewAJAX('test_click_sort', 'page_1', 0);
 
     // Test that the header label is present.
-    $elements = $this->xpath('//th[contains(@class, :class)]/a', array(':class' => 'views-field views-field-name'));
+    $elements = $this->xpath('//th[contains(@class, :class)]/a', [':class' => 'views-field views-field-name']);
     $this->assertTrue(!empty($elements), 'The header label is present.');
 
     // Verify link.
@@ -285,7 +285,7 @@ public function testPreviewSortLink() {
     $this->clickPreviewLinkAJAX($elements[0]['href'], 0);
 
     // Test that the header label is present.
-    $elements = $this->xpath('//th[contains(@class, :class)]/a', array(':class' => 'views-field views-field-name is-active'));
+    $elements = $this->xpath('//th[contains(@class, :class)]/a', [':class' => 'views-field views-field-name is-active']);
     $this->assertTrue(!empty($elements), 'The header label is present.');
 
     // Verify link.
@@ -304,7 +304,7 @@ public function testPreviewSortLink() {
    */
   protected function getPreviewAJAX($view_name, $panel_id, $row_count) {
     $this->drupalGet('admin/structure/views/view/' . $view_name . '/preview/' . $panel_id);
-    $result = $this->drupalPostAjaxForm(NULL, array(), array('op' => t('Update preview')));
+    $result = $this->drupalPostAjaxForm(NULL, [], ['op' => t('Update preview')]);
     $this->assertPreviewAJAX($result, $row_count);
   }
 
@@ -319,12 +319,12 @@ protected function getPreviewAJAX($view_name, $panel_id, $row_count) {
   protected function clickPreviewLinkAJAX($url, $row_count) {
     $content = $this->content;
     $drupal_settings = $this->drupalSettings;
-    $ajax_settings = array(
+    $ajax_settings = [
       'wrapper' => 'views-preview-wrapper',
       'method' => 'replaceWith',
-    );
+    ];
     $url = $this->getAbsoluteUrl($url);
-    $post = array('js' => 'true') + $this->getAjaxPageStatePostData();
+    $post = ['js' => 'true'] + $this->getAjaxPageStatePostData();
     $result = Json::decode($this->drupalPost($url, '', $post, ['query' => [MainContentViewSubscriber::WRAPPER_FORMAT => 'drupal_ajax']]));
     if (!empty($result)) {
       $this->drupalProcessAjaxResponse($content, $result, $ajax_settings, $drupal_settings);
@@ -343,7 +343,7 @@ protected function clickPreviewLinkAJAX($url, $row_count) {
   protected function assertPreviewAJAX($result, $row_count) {
     // Has AJAX callback replied with an insert command? If so, we can
     // assume that the page content was updated with AJAX returned data.
-    $result_commands = array();
+    $result_commands = [];
     foreach ($result as $command) {
       $result_commands[$command['command']] = $command;
     }
diff --git a/core/modules/views_ui/src/Tests/QueryTest.php b/core/modules/views_ui/src/Tests/QueryTest.php
index 351859bbc8c5e9b0ecdebc4fa3a464357400a783..066be3e56daa3c08bae9efdac5b70d398b0af257 100644
--- a/core/modules/views_ui/src/Tests/QueryTest.php
+++ b/core/modules/views_ui/src/Tests/QueryTest.php
@@ -17,7 +17,7 @@ class QueryTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * {@inheritdoc}
@@ -41,8 +41,8 @@ public function testQueryUI() {
     // Save some query settings.
     $query_settings_path = "admin/structure/views/nojs/display/test_view/default/query";
     $random_value = $this->randomMachineName();
-    $this->drupalPostForm($query_settings_path, array('query[options][test_setting]' => $random_value), t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm($query_settings_path, ['query[options][test_setting]' => $random_value], t('Apply'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     // Check that the settings are saved into the view itself.
     $view = Views::getView('test_view');
diff --git a/core/modules/views_ui/src/Tests/RearrangeFieldsTest.php b/core/modules/views_ui/src/Tests/RearrangeFieldsTest.php
index 35c229bf131fea9b55617a023c172a8e295d9242..7d5eddf4308411a98134bcebed289dcd7868c542 100644
--- a/core/modules/views_ui/src/Tests/RearrangeFieldsTest.php
+++ b/core/modules/views_ui/src/Tests/RearrangeFieldsTest.php
@@ -17,7 +17,7 @@ class RearrangeFieldsTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Gets the fields from the View.
@@ -25,7 +25,7 @@ class RearrangeFieldsTest extends UITestBase {
   protected function getViewFields($view_name = 'test_view', $display_id = 'default') {
     $view = Views::getView($view_name);
     $view->setDisplay($display_id);
-    $fields = array();
+    $fields = [];
     foreach ($view->displayHandlers->get('default')->getHandlers('field') as $field => $handler) {
       $fields[] = $field;
     }
@@ -58,13 +58,13 @@ public function testRearrangeFields() {
     $this->assertFieldOrder($view_name, $this->getViewFields($view_name));
 
     // Checks that a field is not deleted if a value is not passed back.
-    $fields = array();
+    $fields = [];
     $this->drupalPostForm('admin/structure/views/nojs/rearrange/' . $view_name . '/default/field', $fields, t('Apply'));
     $this->assertFieldOrder($view_name, $this->getViewFields($view_name));
 
     // Checks that revers the new field order is respected.
     $reversedFields = array_reverse($this->getViewFields($view_name));
-    $fields = array();
+    $fields = [];
     foreach ($reversedFields as $delta => $field) {
       $fields['fields[' . $field . '][weight]'] = $delta;
     }
diff --git a/core/modules/views_ui/src/Tests/RedirectTest.php b/core/modules/views_ui/src/Tests/RedirectTest.php
index 7a019597c766beef211b2808cf41e33f43693d2f..cc5d2467ec01ef52aa991f8bdd5bda54eb19b2fc 100644
--- a/core/modules/views_ui/src/Tests/RedirectTest.php
+++ b/core/modules/views_ui/src/Tests/RedirectTest.php
@@ -14,7 +14,7 @@ class RedirectTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'test_redirect_view');
+  public static $testViews = ['test_view', 'test_redirect_view'];
 
   /**
    * Tests the redirecting.
@@ -25,8 +25,8 @@ public function testRedirect() {
     $random_destination = $this->randomMachineName();
     $edit_path = "admin/structure/views/view/$view_name/edit";
 
-    $this->drupalPostForm($edit_path, array(), t('Save'), array('query' => array('destination' => $random_destination)));
-    $this->assertUrl($random_destination, array(), 'Make sure the user got redirected to the expected page defined in the destination.');
+    $this->drupalPostForm($edit_path, [], t('Save'), ['query' => ['destination' => $random_destination]]);
+    $this->assertUrl($random_destination, [], 'Make sure the user got redirected to the expected page defined in the destination.');
 
     // Setup a view with a certain page display path. If you change the path
     // but have the old url in the destination the user should be redirected to
@@ -37,9 +37,9 @@ public function testRedirect() {
     $edit_path = "admin/structure/views/view/$view_name/edit";
     $path_edit_path = "admin/structure/views/nojs/display/$view_name/page_1/path";
 
-    $this->drupalPostForm($path_edit_path, array('path' => $new_path), t('Apply'));
-    $this->drupalPostForm($edit_path, array(), t('Save'), array('query' => array('destination' => 'test-redirect-view')));
-    $this->assertUrl($new_path, array(), 'Make sure the user got redirected to the expected page after changing the URL of a page display.');
+    $this->drupalPostForm($path_edit_path, ['path' => $new_path], t('Apply'));
+    $this->drupalPostForm($edit_path, [], t('Save'), ['query' => ['destination' => 'test-redirect-view']]);
+    $this->assertUrl($new_path, [], 'Make sure the user got redirected to the expected page after changing the URL of a page display.');
   }
 
 }
diff --git a/core/modules/views_ui/src/Tests/ReportTest.php b/core/modules/views_ui/src/Tests/ReportTest.php
index d7228f17110fe45b6a4587c813ac224c130de969..0162519c15fcc9fd7e2d27e68c04b6e097e23201 100644
--- a/core/modules/views_ui/src/Tests/ReportTest.php
+++ b/core/modules/views_ui/src/Tests/ReportTest.php
@@ -15,7 +15,7 @@ class ReportTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('views', 'views_ui');
+  public static $modules = ['views', 'views_ui'];
 
   /**
    * Stores an admin user used by the different tests.
@@ -26,7 +26,7 @@ class ReportTest extends WebTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array('administer views'));
+    $this->adminUser = $this->drupalCreateUser(['administer views']);
   }
 
   /**
diff --git a/core/modules/views_ui/src/Tests/RowUITest.php b/core/modules/views_ui/src/Tests/RowUITest.php
index 188e0b51a2179158b660f1a7b12c12529b2f6790..568900978398139bf8120380f049072125b051ad 100644
--- a/core/modules/views_ui/src/Tests/RowUITest.php
+++ b/core/modules/views_ui/src/Tests/RowUITest.php
@@ -18,7 +18,7 @@ class RowUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests changing the row plugin and changing some options of a row.
@@ -33,20 +33,20 @@ public function testRowUI() {
     $this->drupalGet($row_plugin_url);
     $this->assertFieldByName('row[type]', 'fields', 'The default row plugin selected in the UI should be fields.');
 
-    $edit = array(
+    $edit = [
       'row[type]' => 'test_row'
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply'));
     $this->assertFieldByName('row_options[test_option]', NULL, 'Make sure the custom settings form from the test plugin appears.');
     $random_name = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'row_options[test_option]' => $random_name
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply'));
     $this->drupalGet($row_options_url);
     $this->assertFieldByName('row_options[test_option]', $random_name, 'Make sure the custom settings form field has the expected value stored.');
 
-    $this->drupalPostForm($view_edit_url, array(), t('Save'));
+    $this->drupalPostForm($view_edit_url, [], t('Save'));
     $this->assertLink(t('Test row plugin'), 0, 'Make sure the test row plugin is shown in the UI');
 
     $view = Views::getView($view_name);
diff --git a/core/modules/views_ui/src/Tests/SettingsTest.php b/core/modules/views_ui/src/Tests/SettingsTest.php
index 30397f404e8d02d74eda0b424bfa257e58bceafd..40a52e9ae0659b4f661455f5797ddc515baac400 100644
--- a/core/modules/views_ui/src/Tests/SettingsTest.php
+++ b/core/modules/views_ui/src/Tests/SettingsTest.php
@@ -35,16 +35,16 @@ function testEditUI() {
     $this->assertLinkByHref('admin/structure/views/settings');
 
     // Test the confirmation message.
-    $this->drupalPostForm('admin/structure/views/settings', array(), t('Save configuration'));
+    $this->drupalPostForm('admin/structure/views/settings', [], t('Save configuration'));
     $this->assertText(t('The configuration options have been saved.'));
 
     // Configure to always show the master display.
-    $edit = array(
+    $edit = [
       'ui_show_master_display' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/settings', $edit, t('Save configuration'));
 
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['description'] = $this->randomMachineName(16);
@@ -56,9 +56,9 @@ function testEditUI() {
     // Configure to not always show the master display.
     // If you have a view without a page or block the master display should be
     // still shown.
-    $edit = array(
+    $edit = [
       'ui_show_master_display' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/settings', $edit, t('Save configuration'));
 
     $view['page[create]'] = FALSE;
@@ -75,45 +75,45 @@ function testEditUI() {
     // @todo It doesn't seem to be a way to test this as this works just on js.
 
     // Configure to show the embeddable display.
-    $edit = array(
+    $edit = [
       'ui_show_display_embed' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/settings', $edit, t('Save configuration'));
 
     $view['id'] = strtolower($this->randomMachineName());
     $this->drupalPostForm('admin/structure/views/add', $view, t('Save and edit'));
     $this->assertFieldById('edit-displays-top-add-display-embed');
 
-    $edit = array(
+    $edit = [
       'ui_show_display_embed' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/settings', $edit, t('Save configuration'));
 
     $this->drupalPostForm('admin/structure/views/add', $view, t('Save and edit'));
     $this->assertNoFieldById('edit-displays-top-add-display-embed');
 
     // Configure to hide/show the sql at the preview.
-    $edit = array(
+    $edit = [
       'ui_show_sql_query_enabled' => FALSE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/settings', $edit, t('Save configuration'));
 
     $view['id'] = strtolower($this->randomMachineName());
     $this->drupalPostForm('admin/structure/views/add', $view, t('Save and edit'));
 
-    $this->drupalPostForm(NULL, array(), t('Update preview'));
+    $this->drupalPostForm(NULL, [], t('Update preview'));
     $xpath = $this->xpath('//div[@class="views-query-info"]/pre');
     $this->assertEqual(count($xpath), 0, 'The views sql is hidden.');
 
-    $edit = array(
+    $edit = [
       'ui_show_sql_query_enabled' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/settings', $edit, t('Save configuration'));
 
     $view['id'] = strtolower($this->randomMachineName());
     $this->drupalPostForm('admin/structure/views/add', $view, t('Save and edit'));
 
-    $this->drupalPostForm(NULL, array(), t('Update preview'));
+    $this->drupalPostForm(NULL, [], t('Update preview'));
     $xpath = $this->xpath('//div[@class="views-query-info"]//pre');
     $this->assertEqual(count($xpath), 1, 'The views sql is shown.');
     $this->assertFalse(strpos($xpath[0], 'db_condition_placeholder') !== FALSE, 'No placeholders are shown in the views sql.');
@@ -122,20 +122,20 @@ function testEditUI() {
     // Test the advanced settings form.
 
     // Test the confirmation message.
-    $this->drupalPostForm('admin/structure/views/settings/advanced', array(), t('Save configuration'));
+    $this->drupalPostForm('admin/structure/views/settings/advanced', [], t('Save configuration'));
     $this->assertText(t('The configuration options have been saved.'));
 
-    $edit = array(
+    $edit = [
       'skip_cache' => TRUE,
       'sql_signature' => TRUE,
-    );
+    ];
     $this->drupalPostForm('admin/structure/views/settings/advanced', $edit, t('Save configuration'));
 
     $this->assertFieldChecked('edit-skip-cache', 'The skip_cache option is checked.');
     $this->assertFieldChecked('edit-sql-signature', 'The sql_signature option is checked.');
 
     // Test the "Clear Views' cache" button.
-    $this->drupalPostForm('admin/structure/views/settings/advanced', array(), t("Clear Views' cache"));
+    $this->drupalPostForm('admin/structure/views/settings/advanced', [], t("Clear Views' cache"));
     $this->assertText(t('The cache has been cleared.'));
   }
 
diff --git a/core/modules/views_ui/src/Tests/StorageTest.php b/core/modules/views_ui/src/Tests/StorageTest.php
index f01a136c6cb637075066886d56857799ac56831d..fa33b8f00bc634be272f545bba83d4dade311115 100644
--- a/core/modules/views_ui/src/Tests/StorageTest.php
+++ b/core/modules/views_ui/src/Tests/StorageTest.php
@@ -17,14 +17,14 @@ class StorageTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Modules to enable.
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'language');
+  public static $modules = ['views_ui', 'language'];
 
   /**
    * Tests changing label, description and tag.
@@ -36,20 +36,20 @@ public function testDetails() {
 
     ConfigurableLanguage::createFromLangcode('fr')->save();
 
-    $edit = array(
+    $edit = [
       'label' => $this->randomMachineName(),
       'tag' => $this->randomMachineName(),
       'description' => $this->randomMachineName(30),
       'langcode' => 'fr',
-    );
+    ];
 
     $this->drupalPostForm("admin/structure/views/nojs/edit-details/$view_name/default", $edit, t('Apply'));
-    $this->drupalPostForm(NULL, array(), t('Save'));
+    $this->drupalPostForm(NULL, [], t('Save'));
 
     $view = Views::getView($view_name);
 
-    foreach (array('label', 'tag', 'description', 'langcode') as $property) {
-      $this->assertEqual($view->storage->get($property), $edit[$property], format_string('Make sure the property @property got probably saved.', array('@property' => $property)));
+    foreach (['label', 'tag', 'description', 'langcode'] as $property) {
+      $this->assertEqual($view->storage->get($property), $edit[$property], format_string('Make sure the property @property got probably saved.', ['@property' => $property]));
     }
   }
 
diff --git a/core/modules/views_ui/src/Tests/StyleTableTest.php b/core/modules/views_ui/src/Tests/StyleTableTest.php
index 7eb757cb33ddd01ac5dca910988c3d322399a275..d6b757e99593a2f83494404cc575fb82185741a5 100644
--- a/core/modules/views_ui/src/Tests/StyleTableTest.php
+++ b/core/modules/views_ui/src/Tests/StyleTableTest.php
@@ -17,7 +17,7 @@ class StyleTableTest extends UITestBase {
    */
   public function testWizard() {
     // Create a new view and check that the first field has a label.
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(16);
     $view['id'] = strtolower($this->randomMachineName(16));
     $view['show[wizard_key]'] = 'node';
diff --git a/core/modules/views_ui/src/Tests/StyleUITest.php b/core/modules/views_ui/src/Tests/StyleUITest.php
index f83cb0391f34cfb9c2e57b572e45fbf952fc1464..3fc2ae07628205ab549392e545c2eabdbf1a15af 100644
--- a/core/modules/views_ui/src/Tests/StyleUITest.php
+++ b/core/modules/views_ui/src/Tests/StyleUITest.php
@@ -17,7 +17,7 @@ class StyleUITest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view');
+  public static $testViews = ['test_view'];
 
   /**
    * Tests changing the style plugin and changing some options of a style.
@@ -32,20 +32,20 @@ public function testStyleUI() {
     $this->drupalGet($style_plugin_url);
     $this->assertFieldByName('style[type]', 'default', 'The default style plugin selected in the UI should be unformatted list.');
 
-    $edit = array(
+    $edit = [
       'style[type]' => 'test_style'
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply'));
     $this->assertFieldByName('style_options[test_option]', NULL, 'Make sure the custom settings form from the test plugin appears.');
     $random_name = $this->randomMachineName();
-    $edit = array(
+    $edit = [
       'style_options[test_option]' => $random_name
-    );
+    ];
     $this->drupalPostForm(NULL, $edit, t('Apply'));
     $this->drupalGet($style_options_url);
     $this->assertFieldByName('style_options[test_option]', $random_name, 'Make sure the custom settings form field has the expected value stored.');
 
-    $this->drupalPostForm($view_edit_url, array(), t('Save'));
+    $this->drupalPostForm($view_edit_url, [], t('Save'));
     $this->assertLink(t('Test style plugin'), 0, 'Make sure the test style plugin is shown in the UI');
 
     $view = Views::getView($view_name);
@@ -56,8 +56,8 @@ public function testStyleUI() {
 
     // Test that fields are working correctly in the UI for style plugins when
     // a field row plugin is selected.
-    $this->drupalPostForm("admin/structure/views/view/$view_name/edit", array(), 'Add Page');
-    $this->drupalPostForm("admin/structure/views/nojs/display/$view_name/page_1/row", array('row[type]' => 'fields'), t('Apply'));
+    $this->drupalPostForm("admin/structure/views/view/$view_name/edit", [], 'Add Page');
+    $this->drupalPostForm("admin/structure/views/nojs/display/$view_name/page_1/row", ['row[type]' => 'fields'], t('Apply'));
     // If fields are being used this text will not be shown.
     $this->assertNoText(t('The selected style or row format does not use fields.'));
   }
diff --git a/core/modules/views_ui/src/Tests/UITestBase.php b/core/modules/views_ui/src/Tests/UITestBase.php
index 74b6f4ff05479f37eed5fc63c6ce7b3791f143a7..0b90e04d1e7715f8969ea772c7205b568754f589 100644
--- a/core/modules/views_ui/src/Tests/UITestBase.php
+++ b/core/modules/views_ui/src/Tests/UITestBase.php
@@ -28,7 +28,7 @@ abstract class UITestBase extends ViewTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'views_ui', 'block', 'taxonomy');
+  public static $modules = ['node', 'views_ui', 'block', 'taxonomy'];
 
   /**
    * {@inheritdoc}
@@ -38,24 +38,24 @@ protected function setUp() {
 
     $this->enableViewsTestModule();
 
-    $this->adminUser = $this->drupalCreateUser(array('administer views'));
+    $this->adminUser = $this->drupalCreateUser(['administer views']);
 
-    $this->fullAdminUser = $this->drupalCreateUser(array('administer views',
+    $this->fullAdminUser = $this->drupalCreateUser(['administer views',
       'administer blocks',
       'bypass node access',
       'access user profiles',
       'view all revisions',
       'administer permissions',
-    ));
+    ]);
     $this->drupalLogin($this->fullAdminUser);
   }
 
   /**
    * A helper method which creates a random view.
    */
-  public function randomView(array $view = array()) {
+  public function randomView(array $view = []) {
     // Create a new view in the UI.
-    $default = array();
+    $default = [];
     $default['label'] = $this->randomMachineName(16);
     $default['id'] = strtolower($this->randomMachineName(16));
     $default['description'] = $this->randomMachineName(16);
@@ -72,7 +72,7 @@ public function randomView(array $view = array()) {
   /**
    * {@inheritdoc}
    */
-  protected function drupalGet($path, array $options = array(), array $headers = array()) {
+  protected function drupalGet($path, array $options = [], array $headers = []) {
     $url = $this->buildUrl($path, $options);
 
     // Ensure that each nojs page is accessible via ajax as well.
diff --git a/core/modules/views_ui/src/Tests/UnsavedPreviewTest.php b/core/modules/views_ui/src/Tests/UnsavedPreviewTest.php
index 4652daca7225c58110f6aa65be505791d8b847ed..6418fc08688f562e1fb58ec0e17663cee5c118b2 100644
--- a/core/modules/views_ui/src/Tests/UnsavedPreviewTest.php
+++ b/core/modules/views_ui/src/Tests/UnsavedPreviewTest.php
@@ -28,7 +28,7 @@ class UnsavedPreviewTest extends ViewTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('node', 'views_ui');
+  public static $modules = ['node', 'views_ui'];
 
   /**
    * Sets up a Drupal site for running functional and integration tests.
diff --git a/core/modules/views_ui/src/Tests/ViewEditTest.php b/core/modules/views_ui/src/Tests/ViewEditTest.php
index afa21df615c5735c90d7d8f33b9ec673b7d25577..08c5cfe862b02a1fde2cb6b30110acc623a1fe03 100644
--- a/core/modules/views_ui/src/Tests/ViewEditTest.php
+++ b/core/modules/views_ui/src/Tests/ViewEditTest.php
@@ -17,7 +17,7 @@ class ViewEditTest extends UITestBase {
    *
    * @var array
    */
-  public static $testViews = array('test_view', 'test_display', 'test_groupwise_term_ui');
+  public static $testViews = ['test_view', 'test_display', 'test_groupwise_term_ui'];
 
   /**
    * Tests the delete link on a views UI.
@@ -30,8 +30,8 @@ public function testDeleteLink() {
     $this->assertTrue($view instanceof View);
     $this->clickLink(t('Delete view'));
     $this->assertUrl('admin/structure/views/view/test_view/delete');
-    $this->drupalPostForm(NULL, array(), t('Delete'));
-    $this->assertRaw(t('The view %name has been deleted.', array('%name' => $view->label())));
+    $this->drupalPostForm(NULL, [], t('Delete'));
+    $this->assertRaw(t('The view %name has been deleted.', ['%name' => $view->label()]));
 
     $this->assertUrl('admin/structure/views');
     $view = $this->container->get('entity.manager')->getStorage('view')->load('test_view');
@@ -44,20 +44,20 @@ public function testDeleteLink() {
   public function testOtherOptions() {
     $this->drupalGet('admin/structure/views/view/test_view');
     // Add a new attachment display.
-    $this->drupalPostForm(NULL, array(), 'Add Attachment');
+    $this->drupalPostForm(NULL, [], 'Add Attachment');
 
     // Test that a long administrative comment is truncated.
-    $edit = array('display_comment' => 'one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen');
+    $edit = ['display_comment' => 'one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen'];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_view/attachment_1/display_comment', $edit, 'Apply');
     $this->assertText('one two three four five six seven eight nine ten eleven twelve thirteen fourteen...');
 
     // Change the machine name for the display from page_1 to test_1.
-    $edit = array('display_id' => 'test_1');
+    $edit = ['display_id' => 'test_1'];
     $this->drupalPostForm('admin/structure/views/nojs/display/test_view/attachment_1/display_id', $edit, 'Apply');
     $this->assertLink(t('test_1'));
 
     // Save the view, and test the new ID has been saved.
-    $this->drupalPostForm(NULL, array(), 'Save');
+    $this->drupalPostForm(NULL, [], 'Save');
     $view = \Drupal::entityManager()->getStorage('view')->load('test_view');
     $displays = $view->get('display');
     $this->assertTrue(!empty($displays['test_1']), 'Display data found for new display ID key.');
@@ -72,16 +72,16 @@ public function testOtherOptions() {
     $this->drupalGet('admin/structure/views/ajax/handler/test_view/fake_display_name/filter/title');
     $this->assertText('Invalid display id fake_display_name');
 
-    $edit = array('display_id' => 'test 1');
+    $edit = ['display_id' => 'test 1'];
     $this->drupalPostForm($machine_name_edit_url, $edit, 'Apply');
     $this->assertText($error_text);
 
-    $edit = array('display_id' => 'test_1#');
+    $edit = ['display_id' => 'test_1#'];
     $this->drupalPostForm($machine_name_edit_url, $edit, 'Apply');
     $this->assertText($error_text);
 
     // Test using an existing display ID.
-    $edit = array('display_id' => 'default');
+    $edit = ['display_id' => 'default'];
     $this->drupalPostForm($machine_name_edit_url, $edit, 'Apply');
     $this->assertText(t('Display id should be unique.'));
 
@@ -97,10 +97,10 @@ public function testOtherOptions() {
     $fields['fields[id][removed]'] = 1;
     $fields['fields[name][removed]'] = 1;
     $this->drupalPostForm('admin/structure/views/nojs/rearrange/test_view/default/field', $fields, t('Apply'));
-    $this->drupalPostForm(NULL, array(), 'Save');
-    $this->drupalPostForm(NULL, array(), t('Cancel'));
+    $this->drupalPostForm(NULL, [], 'Save');
+    $this->drupalPostForm(NULL, [], t('Cancel'));
     $this->assertNoFieldByXpath('//div[contains(@class, "error")]', FALSE, 'No error message is displayed.');
-    $this->assertUrl('admin/structure/views', array(), 'Redirected back to the view listing page..');
+    $this->assertUrl('admin/structure/views', [], 'Redirected back to the view listing page..');
   }
 
   /**
@@ -108,21 +108,21 @@ public function testOtherOptions() {
    */
   public function testEditFormLanguageOptions() {
     // Language options should not exist without language module.
-    $test_views = array(
+    $test_views = [
       'test_view' => 'default',
       'test_display' => 'page_1',
-    );
+    ];
     foreach ($test_views as $view_name => $display) {
       $this->drupalGet('admin/structure/views/view/' . $view_name);
       $this->assertResponse(200);
       $langcode_url = 'admin/structure/views/nojs/display/' . $view_name . '/' . $display . '/rendering_language';
       $this->assertNoLinkByHref($langcode_url);
-      $this->assertNoLink(t('@type language selected for page', array('@type' => t('Content'))));
+      $this->assertNoLink(t('@type language selected for page', ['@type' => t('Content')]));
       $this->assertNoLink(t('Content language of view row'));
     }
 
     // Make the site multilingual and test the options again.
-    $this->container->get('module_installer')->install(array('language', 'content_translation'));
+    $this->container->get('module_installer')->install(['language', 'content_translation']);
     ConfigurableLanguage::createFromLangcode('hu')->save();
     $this->resetAll();
     $this->rebuildContainer();
@@ -134,12 +134,12 @@ public function testEditFormLanguageOptions() {
       $langcode_url = 'admin/structure/views/nojs/display/' . $view_name . '/' . $display . '/rendering_language';
       if ($view_name == 'test_view') {
         $this->assertNoLinkByHref($langcode_url);
-        $this->assertNoLink(t('@type language selected for page', array('@type' => t('Content'))));
+        $this->assertNoLink(t('@type language selected for page', ['@type' => t('Content')]));
         $this->assertNoLink(t('Content language of view row'));
       }
       else {
         $this->assertLinkByHref($langcode_url);
-        $this->assertNoLink(t('@type language selected for page', array('@type' => t('Content'))));
+        $this->assertNoLink(t('@type language selected for page', ['@type' => t('Content')]));
         $this->assertLink(t('Content language of view row'));
       }
 
@@ -152,14 +152,14 @@ public function testEditFormLanguageOptions() {
         $this->assertFieldByName('rendering_language', '***LANGUAGE_entity_translation***');
         // Test that the order of the language list is similar to other language
         // lists, such as in the content translation settings.
-        $expected_elements = array(
+        $expected_elements = [
           '***LANGUAGE_entity_translation***',
           '***LANGUAGE_entity_default***',
           '***LANGUAGE_site_default***',
           '***LANGUAGE_language_interface***',
           'en',
           'hu',
-        );
+        ];
         $elements = $this->xpath('//select[@id="edit-rendering-language"]/option');
         // Compare values inside the option elements with expected values.
         for ($i = 0; $i < count($elements); $i++) {
@@ -202,7 +202,7 @@ public function testEditFormLanguageOptions() {
         $this->drupalGet($langcode_url);
         $this->assertResponse(200);
 
-        $expected_elements = array(
+        $expected_elements = [
           'all',
           '***LANGUAGE_site_default***',
           '***LANGUAGE_language_interface***',
@@ -211,7 +211,7 @@ public function testEditFormLanguageOptions() {
           'hu',
           'und',
           'zxx',
-        );
+        ];
         $elements = $this->xpath('//div[@id="edit-options-value"]//input');
         // Compare values inside the option elements with expected values.
         for ($i = 0; $i < count($elements); $i++) {
@@ -229,7 +229,7 @@ public function testRelationRepresentativeNode() {
     $edit["name[taxonomy_term_field_data.tid_representative]"] = TRUE;
     $this->drupalPostForm('admin/structure/views/nojs/add-handler/test_groupwise_term_ui/default/relationship', $edit, 'Add and configure relationships');
     // Apply changes.
-    $edit = array();
+    $edit = [];
     $this->drupalPostForm('admin/structure/views/nojs/handler/test_groupwise_term_ui/default/relationship/tid_representative', $edit, 'Apply');
   }
 
diff --git a/core/modules/views_ui/src/Tests/ViewsListTest.php b/core/modules/views_ui/src/Tests/ViewsListTest.php
index 768e449d5c5646900c09c78695f4508e461270bc..51786746c11f3eb4a37a6daefa024ce0b0fb0388 100644
--- a/core/modules/views_ui/src/Tests/ViewsListTest.php
+++ b/core/modules/views_ui/src/Tests/ViewsListTest.php
@@ -18,7 +18,7 @@ class ViewsListTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'views_ui');
+  public static $modules = ['block', 'views_ui'];
 
   /**
    * A user with permission to administer views.
diff --git a/core/modules/views_ui/src/Tests/ViewsUITourTest.php b/core/modules/views_ui/src/Tests/ViewsUITourTest.php
index ccc0f296d72f2c2742712117e8ce429b55f6a0e2..31748e87276e08e3faa9ec856d8ee48c20767773 100644
--- a/core/modules/views_ui/src/Tests/ViewsUITourTest.php
+++ b/core/modules/views_ui/src/Tests/ViewsUITourTest.php
@@ -31,11 +31,11 @@ class ViewsUITourTest extends TourTestBase {
    *
    * @var array
    */
-  public static $modules = array('views_ui', 'tour', 'language', 'locale');
+  public static $modules = ['views_ui', 'tour', 'language', 'locale'];
 
   protected function setUp() {
     parent::setUp();
-    $this->adminUser = $this->drupalCreateUser(array('administer views', 'access tour'));
+    $this->adminUser = $this->drupalCreateUser(['administer views', 'access tour']);
     $this->drupalLogin($this->adminUser);
   }
 
@@ -66,18 +66,18 @@ public function testViewsUiTourTipsTranslated() {
     ConfigurableLanguage::createFromLangcode($langcode)->save();
 
     // Handler titles that need translations.
-    $handler_titles = array(
+    $handler_titles = [
       'Format',
       'Fields',
       'Sort criteria',
       'Filter criteria',
-    );
+    ];
 
     foreach ($handler_titles as $handler_title) {
       // Create source string.
-      $source = $this->localeStorage->createString(array(
+      $source = $this->localeStorage->createString([
         'source' => $handler_title
-      ));
+      ]);
       $source->save();
       $this->createTranslation($source, $langcode);
     }
@@ -101,11 +101,11 @@ public function testViewsUiTourTipsTranslated() {
    * Creates single translation for source string.
    */
   public function createTranslation($source, $langcode) {
-    return $this->localeStorage->createTranslation(array(
+    return $this->localeStorage->createTranslation([
         'lid' => $source->lid,
         'language' => $langcode,
         'translation' => $this->randomMachineName(100),
-      ))->save();
+      ])->save();
   }
 
 }
diff --git a/core/modules/views_ui/src/Tests/WizardTest.php b/core/modules/views_ui/src/Tests/WizardTest.php
index 58cf97c83fdb5fd7dfd507c2c42fac2488efb14e..4e57e8f7b698d3d7b64838e55deac81c52047e63 100644
--- a/core/modules/views_ui/src/Tests/WizardTest.php
+++ b/core/modules/views_ui/src/Tests/WizardTest.php
@@ -18,7 +18,7 @@ class WizardTest extends WizardTestBase {
    * Tests filling in the wizard with really long strings.
    */
   public function testWizardFieldLength() {
-    $view = array();
+    $view = [];
     $view['label'] = $this->randomMachineName(256);
     $view['id'] = strtolower($this->randomMachineName(129));
     $view['page[create]'] = TRUE;
@@ -54,7 +54,7 @@ public function testWizardFieldLength() {
     $view['rest_export[path]'] = $this->randomMachineName(254);
 
     $this->drupalPostForm('admin/structure/views/add', $view, t('Save and edit'));
-    $this->assertUrl('admin/structure/views/view/' . $view['id'], array(), 'Make sure the view saving was successful and the browser got redirected to the edit page.');
+    $this->assertUrl('admin/structure/views/view/' . $view['id'], [], 'Make sure the view saving was successful and the browser got redirected to the edit page.');
     // Assert that the page title is correctly truncated.
     $this->assertText(views_ui_truncate($view['page[title]'], 32));
   }
diff --git a/core/modules/views_ui/src/Tests/XssTest.php b/core/modules/views_ui/src/Tests/XssTest.php
index 1d61f1942725e7ed964441f26429bf33232bbc94..1c3cef62cb2acf9a9f027e7b288491ce2885155d 100644
--- a/core/modules/views_ui/src/Tests/XssTest.php
+++ b/core/modules/views_ui/src/Tests/XssTest.php
@@ -14,7 +14,7 @@ class XssTest extends UITestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'user', 'views_ui', 'views_ui_test');
+  public static $modules = ['node', 'user', 'views_ui', 'views_ui_test'];
 
   public function testViewsUi() {
     $this->drupalGet('admin/structure/views/view/sa_contrib_2013_035');
diff --git a/core/modules/views_ui/src/ViewAddForm.php b/core/modules/views_ui/src/ViewAddForm.php
index c3d5c77ce2ab6ee44ea2fa9e2eff6e2474599861..429032c845776334d7979cedccd2d6126a7c043f 100644
--- a/core/modules/views_ui/src/ViewAddForm.php
+++ b/core/modules/views_ui/src/ViewAddForm.php
@@ -51,83 +51,83 @@ protected function prepareEntity() {
    */
   public function form(array $form, FormStateInterface $form_state) {
     $form['#attached']['library'][] = 'views_ui/views_ui.admin';
-    $form['#attributes']['class'] = array('views-admin');
+    $form['#attributes']['class'] = ['views-admin'];
 
-    $form['name'] = array(
+    $form['name'] = [
       '#type' => 'fieldset',
       '#title' => t('View basic information'),
-      '#attributes' => array('class' => array('fieldset-no-legend')),
-    );
+      '#attributes' => ['class' => ['fieldset-no-legend']],
+    ];
 
-    $form['name']['label'] = array(
+    $form['name']['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('View name'),
       '#required' => TRUE,
       '#size' => 32,
       '#default_value' => '',
       '#maxlength' => 255,
-    );
-    $form['name']['id'] = array(
+    ];
+    $form['name']['id'] = [
       '#type' => 'machine_name',
       '#maxlength' => 128,
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => '\Drupal\views\Views::getView',
-        'source' => array('name', 'label'),
-      ),
+        'source' => ['name', 'label'],
+      ],
       '#description' => $this->t('A unique machine-readable name for this View. It must only contain lowercase letters, numbers, and underscores.'),
-    );
+    ];
 
-    $form['name']['description_enable'] = array(
+    $form['name']['description_enable'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Description'),
-    );
-    $form['name']['description'] = array(
+    ];
+    $form['name']['description'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Provide description'),
       '#title_display' => 'invisible',
       '#size' => 64,
       '#default_value' => '',
-      '#states' => array(
-        'visible' => array(
-          ':input[name="description_enable"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
+      '#states' => [
+        'visible' => [
+          ':input[name="description_enable"]' => ['checked' => TRUE],
+        ],
+      ],
+    ];
 
     // Create a wrapper for the entire dynamic portion of the form. Everything
     // that can be updated by AJAX goes somewhere inside here. For example, this
     // is needed by "Show" dropdown (below); it changes the base table of the
     // view and therefore potentially requires all options on the form to be
     // dynamically updated.
-    $form['displays'] = array();
+    $form['displays'] = [];
 
     // Create the part of the form that allows the user to select the basic
     // properties of what the view will display.
-    $form['displays']['show'] = array(
+    $form['displays']['show'] = [
       '#type' => 'fieldset',
       '#title' => t('View settings'),
       '#tree' => TRUE,
-      '#attributes' => array('class' => array('container-inline')),
-    );
+      '#attributes' => ['class' => ['container-inline']],
+    ];
 
     // Create the "Show" dropdown, which allows the base table of the view to be
     // selected.
     $wizard_plugins = $this->wizardManager->getDefinitions();
-    $options = array();
+    $options = [];
     foreach ($wizard_plugins as $key => $wizard) {
       $options[$key] = $wizard['title'];
     }
-    $form['displays']['show']['wizard_key'] = array(
+    $form['displays']['show']['wizard_key'] = [
       '#type' => 'select',
       '#title' => $this->t('Show'),
       '#options' => $options,
-    );
+    ];
     $show_form = &$form['displays']['show'];
     $default_value = \Drupal::moduleHandler()->moduleExists('node') ? 'node' : 'users';
-    $show_form['wizard_key']['#default_value'] = WizardPluginBase::getSelected($form_state, array('show', 'wizard_key'), $default_value, $show_form['wizard_key']);
+    $show_form['wizard_key']['#default_value'] = WizardPluginBase::getSelected($form_state, ['show', 'wizard_key'], $default_value, $show_form['wizard_key']);
     // Changing this dropdown updates the entire content of $form['displays'] via
     // AJAX.
-    views_ui_add_ajax_trigger($show_form, 'wizard_key', array('displays'));
+    views_ui_add_ajax_trigger($show_form, 'wizard_key', ['displays']);
 
     // Build the rest of the form based on the currently selected wizard plugin.
     $wizard_key = $show_form['wizard_key']['#default_value'];
@@ -144,13 +144,13 @@ protected function actions(array $form, FormStateInterface $form_state) {
     $actions = parent::actions($form, $form_state);
     $actions['submit']['#value'] = $this->t('Save and edit');
     // Remove EntityFormController::save() form the submission handlers.
-    $actions['submit']['#submit'] = array(array($this, 'submitForm'));
-    $actions['cancel'] = array(
+    $actions['submit']['#submit'] = [[$this, 'submitForm']];
+    $actions['cancel'] = [
       '#type' => 'submit',
       '#value' => $this->t('Cancel'),
-      '#submit' => array('::cancel'),
-      '#limit_validation_errors' => array(),
-    );
+      '#submit' => ['::cancel'],
+      '#limit_validation_errors' => [],
+    ];
     return $actions;
   }
 
@@ -158,7 +158,7 @@ protected function actions(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function validateForm(array &$form, FormStateInterface $form_state) {
-    $wizard_type = $form_state->getValue(array('show', 'wizard_key'));
+    $wizard_type = $form_state->getValue(['show', 'wizard_key']);
     $wizard_instance = $this->wizardManager->createInstance($wizard_type);
     $form_state->set('wizard', $wizard_instance->getPluginDefinition());
     $form_state->set('wizard_instance', $wizard_instance);
@@ -187,7 +187,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       return;
     }
     $this->entity->save();
-    drupal_set_message($this->t('The view %name has been saved.', array('%name' => $form_state->getValue('label'))));
+    drupal_set_message($this->t('The view %name has been saved.', ['%name' => $form_state->getValue('label')]));
     $form_state->setRedirectUrl($this->entity->urlInfo('edit-form'));
   }
 
diff --git a/core/modules/views_ui/src/ViewDuplicateForm.php b/core/modules/views_ui/src/ViewDuplicateForm.php
index 9870d8e8e14d8c1a31924e63fa449019d27b0c5c..fa2db6080116d121a35845c26a59a0c51e7e0eed 100644
--- a/core/modules/views_ui/src/ViewDuplicateForm.php
+++ b/core/modules/views_ui/src/ViewDuplicateForm.php
@@ -22,26 +22,26 @@ protected function prepareEntity() {
   public function form(array $form, FormStateInterface $form_state) {
     parent::form($form, $form_state);
 
-    $form['#title'] = $this->t('Duplicate of @label', array('@label' => $this->entity->label()));
+    $form['#title'] = $this->t('Duplicate of @label', ['@label' => $this->entity->label()]);
 
-    $form['label'] = array(
+    $form['label'] = [
       '#type' => 'textfield',
       '#title' => $this->t('View name'),
       '#required' => TRUE,
       '#size' => 32,
       '#maxlength' => 255,
-      '#default_value' => $this->t('Duplicate of @label', array('@label' => $this->entity->label())),
-    );
-    $form['id'] = array(
+      '#default_value' => $this->t('Duplicate of @label', ['@label' => $this->entity->label()]),
+    ];
+    $form['id'] = [
       '#type' => 'machine_name',
       '#maxlength' => 128,
-      '#machine_name' => array(
+      '#machine_name' => [
         'exists' => '\Drupal\views\Views::getView',
-        'source' => array('label'),
-      ),
+        'source' => ['label'],
+      ],
       '#default_value' => '',
       '#description' => $this->t('A unique machine-readable name for this View. It must only contain lowercase letters, numbers, and underscores.'),
-    );
+    ];
 
     return $form;
   }
@@ -50,10 +50,10 @@ public function form(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   protected function actions(array $form, FormStateInterface $form_state) {
-    $actions['submit'] = array(
+    $actions['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Duplicate'),
-    );
+    ];
     return $actions;
   }
 
diff --git a/core/modules/views_ui/src/ViewEditForm.php b/core/modules/views_ui/src/ViewEditForm.php
index 6e819395914257293310797576cc8bb44c797d2d..67d1229555d2f0733669be862b3659a98301afc3 100644
--- a/core/modules/views_ui/src/ViewEditForm.php
+++ b/core/modules/views_ui/src/ViewEditForm.php
@@ -98,7 +98,7 @@ public function form(array $form, FormStateInterface $form_state) {
 
     if ($display_id) {
       if (!$view->getExecutable()->setDisplay($display_id)) {
-        $form['#markup'] = $this->t('Invalid display id @display', array('@display' => $display_id));
+        $form['#markup'] = $this->t('Invalid display id @display', ['@display' => $display_id]);
         return $form;
       }
     }
@@ -112,55 +112,55 @@ public function form(array $form, FormStateInterface $form_state) {
     $form['#attached']['library'][] = 'views_ui/views_ui.admin';
     $form['#attached']['library'][] = 'views_ui/admin.styling';
 
-    $form += array(
+    $form += [
       '#prefix' => '',
       '#suffix' => '',
-    );
+    ];
 
     $view_status = $view->status() ? 'enabled' : 'disabled';
     $form['#prefix'] .= '<div class="views-edit-view views-admin ' . $view_status . ' clearfix">';
     $form['#suffix'] = '</div>' . $form['#suffix'];
 
-    $form['#attributes']['class'] = array('form-edit');
+    $form['#attributes']['class'] = ['form-edit'];
 
     if ($view->isLocked()) {
-      $username = array(
+      $username = [
         '#theme' => 'username',
         '#account' => $this->entityManager->getStorage('user')->load($view->lock->owner),
-      );
-      $lock_message_substitutions = array(
+      ];
+      $lock_message_substitutions = [
         '@user' => drupal_render($username),
         '@age' => $this->dateFormatter->formatTimeDiffSince($view->lock->updated),
         ':url' => $view->url('break-lock-form'),
-      );
-      $form['locked'] = array(
+      ];
+      $form['locked'] = [
         '#type' => 'container',
-        '#attributes' => array('class' => array('view-locked', 'messages', 'messages--warning')),
+        '#attributes' => ['class' => ['view-locked', 'messages', 'messages--warning']],
         '#children' => $this->t('This view is being edited by user @user, and is therefore locked from editing by others. This lock is @age old. Click here to <a href=":url">break this lock</a>.', $lock_message_substitutions),
         '#weight' => -10,
-      );
+      ];
     }
     else {
-      $form['changed'] = array(
+      $form['changed'] = [
         '#type' => 'container',
-        '#attributes' => array('class' => array('view-changed', 'messages', 'messages--warning')),
+        '#attributes' => ['class' => ['view-changed', 'messages', 'messages--warning']],
         '#children' => $this->t('You have unsaved changes.'),
         '#weight' => -10,
-      );
+      ];
       if (empty($view->changed)) {
         $form['changed']['#attributes']['class'][] = 'js-hide';
       }
     }
 
-    $form['displays'] = array(
+    $form['displays'] = [
       '#prefix' => '<h1 class="unit-title clearfix">' . $this->t('Displays') . '</h1>',
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array(
+      '#attributes' => [
+        'class' => [
           'views-displays',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
 
     $form['displays']['top'] = $this->renderDisplayTop($view);
@@ -170,13 +170,13 @@ public function form(array $form, FormStateInterface $form_state) {
       $form_state->set('display_id', $display_id);
 
       // The part of the page where editing will take place.
-      $form['displays']['settings'] = array(
+      $form['displays']['settings'] = [
         '#type' => 'container',
         '#id' => 'edit-display-settings',
-        '#attributes' => array(
-          'class' => array('edit-display-settings'),
-        ),
-      );
+        '#attributes' => [
+          'class' => ['edit-display-settings'],
+        ],
+      ];
 
       // Add a text that the display is disabled.
       if ($view->getExecutable()->displayHandlers->has($display_id)) {
@@ -187,8 +187,8 @@ public function form(array $form, FormStateInterface $form_state) {
 
       // Add the edit display content
       $tab_content = $this->getDisplayTab($view);
-      $tab_content['#theme_wrappers'] = array('container');
-      $tab_content['#attributes'] = array('class' => array('views-display-tab'));
+      $tab_content['#theme_wrappers'] = ['container'];
+      $tab_content['#attributes'] = ['class' => ['views-display-tab']];
       $tab_content['#id'] = 'views-tab-' . $display_id;
       // Mark deleted displays as such.
       $display = $view->get('display');
@@ -200,10 +200,10 @@ public function form(array $form, FormStateInterface $form_state) {
       if ($view->getExecutable()->displayHandlers->has($display_id) && !$view->getExecutable()->displayHandlers->get($display_id)->isEnabled()) {
         $tab_content['#attributes']['class'][] = 'views-display-disabled';
       }
-      $form['displays']['settings']['settings_content'] = array(
+      $form['displays']['settings']['settings_content'] = [
         '#type' => 'container',
         'tab_content' => $tab_content,
-      );
+      ];
     }
 
     return $form;
@@ -216,12 +216,12 @@ protected function actions(array $form, FormStateInterface $form_state) {
     $actions = parent::actions($form, $form_state);
     unset($actions['delete']);
 
-    $actions['cancel'] = array(
+    $actions['cancel'] = [
       '#type' => 'submit',
       '#value' => $this->t('Cancel'),
-      '#submit' => array('::cancel'),
-      '#limit_validation_errors' => array(),
-    );
+      '#submit' => ['::cancel'],
+      '#limit_validation_errors' => [],
+    ];
     if ($this->entity->isLocked()) {
       $actions['submit']['#access'] = FALSE;
       $actions['cancel']['#access'] = FALSE;
@@ -285,10 +285,10 @@ public function save(array $form, FormStateInterface $form_state) {
         unset($displays[$id]);
 
         // Redirect the user to the renamed display to be sure that the page itself exists and doesn't throw errors.
-        $form_state->setRedirect('entity.view.edit_display_form', array(
+        $form_state->setRedirect('entity.view.edit_display_form', [
           'view' => $view->id(),
           'display_id' => $new_id,
-        ));
+        ]);
       }
     }
     $view->set('display', $displays);
@@ -320,7 +320,7 @@ public function save(array $form, FormStateInterface $form_state) {
 
     $view->save();
 
-    drupal_set_message($this->t('The view %name has been saved.', array('%name' => $view->label())));
+    drupal_set_message($this->t('The view %name has been saved.', ['%name' => $view->label()]));
 
     // Remove this view from cache so we can edit it properly.
     $this->tempStore->delete($view->id());
@@ -345,14 +345,14 @@ public function cancel(array $form, FormStateInterface $form_state) {
    * Returns a renderable array representing the edit page for one display.
    */
   public function getDisplayTab($view) {
-    $build = array();
+    $build = [];
     $display_id = $this->displayID;
     $display = $view->getExecutable()->displayHandlers->get($display_id);
     // If the plugin doesn't exist, display an error message instead of an edit
     // page.
     if (empty($display)) {
       // @TODO: Improved UX for the case where a plugin is missing.
-      $build['#markup'] = $this->t("Error: Display @display refers to a plugin named '@plugin', but that plugin is not available.", array('@display' => $display->display['id'], '@plugin' => $display->display['display_plugin']));
+      $build['#markup'] = $this->t("Error: Display @display refers to a plugin named '@plugin', but that plugin is not available.", ['@display' => $display->display['id'], '@plugin' => $display->display['display_plugin']]);
     }
     // Build the content of the edit page.
     else {
@@ -374,10 +374,10 @@ public function getDisplayTab($view) {
    */
   public function getDisplayDetails($view, $display) {
     $display_title = $this->getDisplayLabel($view, $display['id'], FALSE);
-    $build = array(
-      '#theme_wrappers' => array('container'),
-      '#attributes' => array('id' => 'edit-display-settings-details'),
-    );
+    $build = [
+      '#theme_wrappers' => ['container'],
+      '#attributes' => ['id' => 'edit-display-settings-details'],
+    ];
 
     $is_display_deleted = !empty($display['deleted']);
     // The master display cannot be duplicated.
@@ -386,14 +386,14 @@ public function getDisplayDetails($view, $display) {
     $is_enabled = $view->getExecutable()->displayHandlers->get($display['id'])->isEnabled();
 
     if ($display['id'] != 'default') {
-      $build['top']['#theme_wrappers'] = array('container');
+      $build['top']['#theme_wrappers'] = ['container'];
       $build['top']['#attributes']['id'] = 'edit-display-settings-top';
-      $build['top']['#attributes']['class'] = array('views-ui-display-tab-actions', 'edit-display-settings-top', 'views-ui-display-tab-bucket', 'clearfix');
+      $build['top']['#attributes']['class'] = ['views-ui-display-tab-actions', 'edit-display-settings-top', 'views-ui-display-tab-bucket', 'clearfix'];
 
       // The Delete, Duplicate and Undo Delete buttons.
-      $build['top']['actions'] = array(
-        '#theme_wrappers' => array('dropbutton_wrapper'),
-      );
+      $build['top']['actions'] = [
+        '#theme_wrappers' => ['dropbutton_wrapper'],
+      ];
 
       // Because some of the 'links' are actually submit buttons, we have to
       // manually wrap each item in <li> and the whole list in <ul>.
@@ -401,14 +401,14 @@ public function getDisplayDetails($view, $display) {
 
       if (!$is_display_deleted) {
         if (!$is_enabled) {
-          $build['top']['actions']['enable'] = array(
+          $build['top']['actions']['enable'] = [
             '#type' => 'submit',
             '#value' => $this->t('Enable @display_title', ['@display_title' => $display_title]),
-            '#limit_validation_errors' => array(),
-            '#submit' => array('::submitDisplayEnable', '::submitDelayDestination'),
+            '#limit_validation_errors' => [],
+            '#submit' => ['::submitDisplayEnable', '::submitDelayDestination'],
             '#prefix' => '<li class="enable">',
             "#suffix" => '</li>',
-          );
+          ];
         }
         // Add a link to view the page unless the view is disabled or has no
         // path.
@@ -423,118 +423,118 @@ public function getDisplayDetails($view, $display) {
             else {
               $url = Url::fromUri("base:$path");
             }
-            $build['top']['actions']['path'] = array(
+            $build['top']['actions']['path'] = [
               '#type' => 'link',
               '#title' => $this->t('View @display_title', ['@display_title' => $display_title]),
-              '#options' => array('alt' => array($this->t("Go to the real page for this display"))),
+              '#options' => ['alt' => [$this->t("Go to the real page for this display")]],
               '#url' => $url,
               '#prefix' => '<li class="view">',
               "#suffix" => '</li>',
-            );
+            ];
           }
         }
         if (!$is_default) {
-          $build['top']['actions']['duplicate'] = array(
+          $build['top']['actions']['duplicate'] = [
             '#type' => 'submit',
             '#value' => $this->t('Duplicate @display_title', ['@display_title' => $display_title]),
-            '#limit_validation_errors' => array(),
-            '#submit' => array('::submitDisplayDuplicate', '::submitDelayDestination'),
+            '#limit_validation_errors' => [],
+            '#submit' => ['::submitDisplayDuplicate', '::submitDelayDestination'],
             '#prefix' => '<li class="duplicate">',
             "#suffix" => '</li>',
-          );
+          ];
         }
         // Always allow a display to be deleted.
-        $build['top']['actions']['delete'] = array(
+        $build['top']['actions']['delete'] = [
           '#type' => 'submit',
           '#value' => $this->t('Delete @display_title', ['@display_title' => $display_title]),
-          '#limit_validation_errors' => array(),
-          '#submit' => array('::submitDisplayDelete', '::submitDelayDestination'),
+          '#limit_validation_errors' => [],
+          '#submit' => ['::submitDisplayDelete', '::submitDelayDestination'],
           '#prefix' => '<li class="delete">',
           "#suffix" => '</li>',
-        );
+        ];
 
-        foreach (Views::fetchPluginNames('display', NULL, array($view->get('storage')->get('base_table'))) as $type => $label) {
+        foreach (Views::fetchPluginNames('display', NULL, [$view->get('storage')->get('base_table')]) as $type => $label) {
           if ($type == $display['display_plugin']) {
             continue;
           }
 
-          $build['top']['actions']['duplicate_as'][$type] = array(
+          $build['top']['actions']['duplicate_as'][$type] = [
             '#type' => 'submit',
             '#value' => $this->t('Duplicate as @type', ['@type' => $label]),
-            '#limit_validation_errors' => array(),
-            '#submit' => array('::submitDuplicateDisplayAsType', '::submitDelayDestination'),
+            '#limit_validation_errors' => [],
+            '#submit' => ['::submitDuplicateDisplayAsType', '::submitDelayDestination'],
             '#prefix' => '<li class="duplicate">',
             '#suffix' => '</li>',
-          );
+          ];
         }
       }
       else {
-        $build['top']['actions']['undo_delete'] = array(
+        $build['top']['actions']['undo_delete'] = [
           '#type' => 'submit',
           '#value' => $this->t('Undo delete of @display_title', ['@display_title' => $display_title]),
-          '#limit_validation_errors' => array(),
-          '#submit' => array('::submitDisplayUndoDelete', '::submitDelayDestination'),
+          '#limit_validation_errors' => [],
+          '#submit' => ['::submitDisplayUndoDelete', '::submitDelayDestination'],
           '#prefix' => '<li class="undo-delete">',
           "#suffix" => '</li>',
-        );
+        ];
       }
       if ($is_enabled) {
-        $build['top']['actions']['disable'] = array(
+        $build['top']['actions']['disable'] = [
           '#type' => 'submit',
           '#value' => $this->t('Disable @display_title', ['@display_title' => $display_title]),
-          '#limit_validation_errors' => array(),
-          '#submit' => array('::submitDisplayDisable', '::submitDelayDestination'),
+          '#limit_validation_errors' => [],
+          '#submit' => ['::submitDisplayDisable', '::submitDelayDestination'],
           '#prefix' => '<li class="disable">',
           "#suffix" => '</li>',
-        );
+        ];
       }
       $build['top']['actions']['suffix']['#markup'] = '</ul>';
 
       // The area above the three columns.
-      $build['top']['display_title'] = array(
+      $build['top']['display_title'] = [
         '#theme' => 'views_ui_display_tab_setting',
         '#description' => $this->t('Display name'),
         '#link' => $view->getExecutable()->displayHandlers->get($display['id'])->optionLink($display_title, 'display_title'),
-      );
+      ];
     }
 
-    $build['columns'] = array();
-    $build['columns']['#theme_wrappers'] = array('container');
-    $build['columns']['#attributes'] = array('id' => 'edit-display-settings-main', 'class' => array('clearfix', 'views-display-columns'));
+    $build['columns'] = [];
+    $build['columns']['#theme_wrappers'] = ['container'];
+    $build['columns']['#attributes'] = ['id' => 'edit-display-settings-main', 'class' => ['clearfix', 'views-display-columns']];
 
-    $build['columns']['first']['#theme_wrappers'] = array('container');
-    $build['columns']['first']['#attributes'] = array('class' => array('views-display-column', 'first'));
+    $build['columns']['first']['#theme_wrappers'] = ['container'];
+    $build['columns']['first']['#attributes'] = ['class' => ['views-display-column', 'first']];
 
-    $build['columns']['second']['#theme_wrappers'] = array('container');
-    $build['columns']['second']['#attributes'] = array('class' => array('views-display-column', 'second'));
+    $build['columns']['second']['#theme_wrappers'] = ['container'];
+    $build['columns']['second']['#attributes'] = ['class' => ['views-display-column', 'second']];
 
-    $build['columns']['second']['settings'] = array();
-    $build['columns']['second']['header'] = array();
-    $build['columns']['second']['footer'] = array();
-    $build['columns']['second']['empty'] = array();
-    $build['columns']['second']['pager'] = array();
+    $build['columns']['second']['settings'] = [];
+    $build['columns']['second']['header'] = [];
+    $build['columns']['second']['footer'] = [];
+    $build['columns']['second']['empty'] = [];
+    $build['columns']['second']['pager'] = [];
 
     // The third column buckets are wrapped in details.
-    $build['columns']['third'] = array(
+    $build['columns']['third'] = [
       '#type' => 'details',
       '#title' => $this->t('Advanced'),
-      '#theme_wrappers' => array('details'),
-      '#attributes' => array(
-        'class' => array(
+      '#theme_wrappers' => ['details'],
+      '#attributes' => [
+        'class' => [
           'views-display-column',
           'third',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     // Collapse the details by default.
     $build['columns']['third']['#open'] = \Drupal::config('views.settings')->get('ui.show.advanced_column');
 
     // Each option (e.g. title, access, display as grid/table/list) fits into one
     // of several "buckets," or boxes (Format, Fields, Sort, and so on).
-    $buckets = array();
+    $buckets = [];
 
     // Fetch options from the display plugin, with a list of buckets they go into.
-    $options = array();
+    $options = [];
     $view->getExecutable()->displayHandlers->get($display['id'])->optionsSummary($buckets, $options);
 
     // Place each option into its bucket.
@@ -589,10 +589,10 @@ public function submitDisplayUndoDelete($form, FormStateInterface $form_state) {
     $view->cacheSet();
 
     // Redirect to the top-level edit page.
-    $form_state->setRedirect('entity.view.edit_display_form', array(
+    $form_state->setRedirect('entity.view.edit_display_form', [
       'view' => $view->id(),
       'display_id' => $id,
-    ));
+    ]);
   }
 
   /**
@@ -608,10 +608,10 @@ public function submitDisplayEnable($form, FormStateInterface $form_state) {
     $view->cacheSet();
 
     // Redirect to the top-level edit page.
-    $form_state->setRedirect('entity.view.edit_display_form', array(
+    $form_state->setRedirect('entity.view.edit_display_form', [
       'view' => $view->id(),
       'display_id' => $id,
-    ));
+    ]);
   }
 
   /**
@@ -626,10 +626,10 @@ public function submitDisplayDisable($form, FormStateInterface $form_state) {
     $view->cacheSet();
 
     // Redirect to the top-level edit page.
-    $form_state->setRedirect('entity.view.edit_display_form', array(
+    $form_state->setRedirect('entity.view.edit_display_form', [
       'view' => $view->id(),
       'display_id' => $id,
-    ));
+    ]);
   }
 
   /**
@@ -681,43 +681,43 @@ public function rebuildCurrentTab(ViewUI $view, AjaxResponse $response, $display
   public function renderDisplayTop(ViewUI $view) {
     $display_id = $this->displayID;
     $element['#theme_wrappers'][] = 'views_ui_container';
-    $element['#attributes']['class'] = array('views-display-top', 'clearfix');
-    $element['#attributes']['id'] = array('views-display-top');
+    $element['#attributes']['class'] = ['views-display-top', 'clearfix'];
+    $element['#attributes']['id'] = ['views-display-top'];
 
     // Extra actions for the display
-    $element['extra_actions'] = array(
+    $element['extra_actions'] = [
       '#type' => 'dropbutton',
-      '#attributes' => array(
+      '#attributes' => [
         'id' => 'views-display-extra-actions',
-      ),
-      '#links' => array(
-        'edit-details' => array(
+      ],
+      '#links' => [
+        'edit-details' => [
           'title' => $this->t('Edit view name/description'),
           'url' => Url::fromRoute('views_ui.form_edit_details', ['js' => 'nojs', 'view' => $view->id(), 'display_id' => $display_id]),
-          'attributes' => array('class' => array('views-ajax-link')),
-        ),
-        'analyze' => array(
+          'attributes' => ['class' => ['views-ajax-link']],
+        ],
+        'analyze' => [
           'title' => $this->t('Analyze view'),
           'url' => Url::fromRoute('views_ui.form_analyze', ['js' => 'nojs', 'view' => $view->id(), 'display_id' => $display_id]),
-          'attributes' => array('class' => array('views-ajax-link')),
-        ),
-        'duplicate' => array(
+          'attributes' => ['class' => ['views-ajax-link']],
+        ],
+        'duplicate' => [
           'title' => $this->t('Duplicate view'),
           'url' => $view->urlInfo('duplicate-form'),
-        ),
-        'reorder' => array(
+        ],
+        'reorder' => [
           'title' => $this->t('Reorder displays'),
           'url' => Url::fromRoute('views_ui.form_reorder_displays', ['js' => 'nojs', 'view' => $view->id(), 'display_id' => $display_id]),
-          'attributes' => array('class' => array('views-ajax-link')),
-        ),
-      ),
-    );
+          'attributes' => ['class' => ['views-ajax-link']],
+        ],
+      ],
+    ];
 
     if ($view->access('delete')) {
-      $element['extra_actions']['#links']['delete'] = array(
+      $element['extra_actions']['#links']['delete'] = [
         'title' => $this->t('Delete view'),
         'url' => $view->urlInfo('delete-form'),
-      );
+      ];
     }
 
     // Let other modules add additional links here.
@@ -725,17 +725,17 @@ public function renderDisplayTop(ViewUI $view) {
 
     if (isset($view->type) && $view->type != $this->t('Default')) {
       if ($view->type == $this->t('Overridden')) {
-        $element['extra_actions']['#links']['revert'] = array(
+        $element['extra_actions']['#links']['revert'] = [
           'title' => $this->t('Revert view'),
           'href' => "admin/structure/views/view/{$view->id()}/revert",
-          'query' => array('destination' => $view->url('edit-form')),
-        );
+          'query' => ['destination' => $view->url('edit-form')],
+        ];
       }
       else {
-        $element['extra_actions']['#links']['delete'] = array(
+        $element['extra_actions']['#links']['delete'] = [
           'title' => $this->t('Delete view'),
           'url' => $view->urlInfo('delete-form'),
-        );
+        ];
       }
     }
 
@@ -750,18 +750,18 @@ public function renderDisplayTop(ViewUI $view) {
     }
 
     // Buttons for adding a new display.
-    foreach (Views::fetchPluginNames('display', NULL, array($view->get('base_table'))) as $type => $label) {
-      $element['add_display'][$type] = array(
+    foreach (Views::fetchPluginNames('display', NULL, [$view->get('base_table')]) as $type => $label) {
+      $element['add_display'][$type] = [
         '#type' => 'submit',
-        '#value' => $this->t('Add @display', array('@display' => $label)),
-        '#limit_validation_errors' => array(),
-        '#submit' => array('::submitDisplayAdd', '::submitDelayDestination'),
-        '#attributes' => array('class' => array('add-display')),
+        '#value' => $this->t('Add @display', ['@display' => $label]),
+        '#limit_validation_errors' => [],
+        '#submit' => ['::submitDisplayAdd', '::submitDelayDestination'],
+        '#attributes' => ['class' => ['add-display']],
         // Allow JavaScript to remove the 'Add ' prefix from the button label when
         // placing the button in a "Add" dropdown menu.
-        '#process' => array_merge(array('views_ui_form_button_was_clicked'), $this->elementInfo->getInfoProperty('submit', '#process', array())),
-        '#values' => array($this->t('Add @display', array('@display' => $label)), $label),
-      );
+        '#process' => array_merge(['views_ui_form_button_was_clicked'], $this->elementInfo->getInfoProperty('submit', '#process', [])),
+        '#values' => [$this->t('Add @display', ['@display' => $label]), $label],
+      ];
     }
 
     return $element;
@@ -824,10 +824,10 @@ public function submitDisplayDuplicate($form, FormStateInterface $form_state) {
     $view->cacheSet();
 
     // Redirect to the new display's edit page.
-    $form_state->setRedirect('entity.view.edit_display_form', array(
+    $form_state->setRedirect('entity.view.edit_display_form', [
       'view' => $view->id(),
       'display_id' => $new_display_id,
-    ));
+    ]);
   }
 
   /**
@@ -846,10 +846,10 @@ public function submitDisplayAdd($form, FormStateInterface $form_state) {
     $view->cacheSet();
 
     // Redirect to the new display's edit page.
-    $form_state->setRedirect('entity.view.edit_display_form', array(
+    $form_state->setRedirect('entity.view.edit_display_form', [
       'view' => $view->id(),
       'display_id' => $display_id,
-    ));
+    ]);
   }
 
   /**
@@ -872,10 +872,10 @@ public function submitDuplicateDisplayAsType($form, FormStateInterface $form_sta
     $view->cacheSet();
 
     // Redirect to the new display's edit page.
-    $form_state->setRedirect('entity.view.edit_display_form', array(
+    $form_state->setRedirect('entity.view.edit_display_form', [
       'view' => $view->id(),
       'display_id' => $new_display_id,
-    ));
+    ]);
   }
 
   /**
@@ -885,14 +885,14 @@ public function submitDuplicateDisplayAsType($form, FormStateInterface $form_sta
    * object emerges out of refactoring.
    */
   public function buildOptionForm(ViewUI $view, $id, $option, $display) {
-    $option_build = array();
+    $option_build = [];
     $option_build['#theme'] = 'views_ui_display_tab_setting';
 
     $option_build['#description'] = $option['title'];
 
     $option_build['#link'] = $view->getExecutable()->displayHandlers->get($display['id'])->optionLink($option['value'], $id, '', empty($option['desc']) ? '' : $option['desc']);
 
-    $option_build['#links'] = array();
+    $option_build['#links'] = [];
     if (!empty($option['links']) && is_array($option['links'])) {
       foreach ($option['links'] as $link_id => $link_value) {
         $option_build['#settings_links'][] = $view->getExecutable()->displayHandlers->get($display['id'])->optionLink($option['setting'], $link_id, 'views-button-configure', $link_value);
@@ -925,9 +925,9 @@ public function getFormBucket(ViewUI $view, $type, $display) {
 
     $types = $executable->getHandlerTypes();
 
-    $build = array(
-      '#theme_wrappers' => array('views_ui_display_tab_bucket'),
-    );
+    $build = [
+      '#theme_wrappers' => ['views_ui_display_tab_bucket'],
+    ];
 
     $build['#overridden'] = FALSE;
     $build['#defaulted'] = FALSE;
@@ -953,11 +953,11 @@ public function getFormBucket(ViewUI $view, $type, $display) {
         $style_plugin = $executable->style_plugin;
         $uses_fields = $style_plugin && $style_plugin->usesFields();
         if (!$uses_fields) {
-          $build['fields'][] = array(
+          $build['fields'][] = [
             '#markup' => $this->t('The selected style or row format does not use fields.'),
-            '#theme_wrappers' => array('views_ui_container'),
-            '#attributes' => array('class' => array('views-display-setting')),
-          );
+            '#theme_wrappers' => ['views_ui_container'],
+            '#attributes' => ['class' => ['views-display-setting']],
+          ];
           return $build;
         }
         break;
@@ -965,47 +965,47 @@ public function getFormBucket(ViewUI $view, $type, $display) {
       case 'footer':
       case 'empty':
         if (!$executable->display_handler->usesAreas()) {
-          $build[$type][] = array(
-            '#markup' => $this->t('The selected display type does not use @type plugins', array('@type' => $type)),
-            '#theme_wrappers' => array('views_ui_container'),
-            '#attributes' => array('class' => array('views-display-setting')),
-          );
+          $build[$type][] = [
+            '#markup' => $this->t('The selected display type does not use @type plugins', ['@type' => $type]),
+            '#theme_wrappers' => ['views_ui_container'],
+            '#attributes' => ['class' => ['views-display-setting']],
+          ];
           return $build;
         }
         break;
     }
 
     // Create an array of actions to pass to links template.
-    $actions = array();
+    $actions = [];
     $count_handlers = count($executable->display_handler->getHandlers($type));
 
     // Create the add text variable for the add action.
-    $add_text = $this->t('Add <span class="visually-hidden">@type</span>', array('@type' => $types[$type]['ltitle']));
+    $add_text = $this->t('Add <span class="visually-hidden">@type</span>', ['@type' => $types[$type]['ltitle']]);
 
-    $actions['add'] = array(
+    $actions['add'] = [
       'title' => $add_text,
       'url' => Url::fromRoute('views_ui.form_add_handler', ['js' => 'nojs', 'view' => $view->id(), 'display_id' => $display['id'], 'type' => $type]),
-      'attributes' => array('class' => array('icon compact add', 'views-ajax-link'), 'id' => 'views-add-' . $type),
-    );
+      'attributes' => ['class' => ['icon compact add', 'views-ajax-link'], 'id' => 'views-add-' . $type],
+    ];
     if ($count_handlers > 0) {
       // Create the rearrange text variable for the rearrange action.
-      $rearrange_text = $type == 'filter' ? $this->t('And/Or Rearrange <span class="visually-hidden">filter criteria</span>') : $this->t('Rearrange <span class="visually-hidden">@type</span>', array('@type' => $types[$type]['ltitle']));
+      $rearrange_text = $type == 'filter' ? $this->t('And/Or Rearrange <span class="visually-hidden">filter criteria</span>') : $this->t('Rearrange <span class="visually-hidden">@type</span>', ['@type' => $types[$type]['ltitle']]);
 
-      $actions['rearrange'] = array(
+      $actions['rearrange'] = [
         'title' => $rearrange_text,
         'url' => $rearrange_url,
-        'attributes' => array('class' => array($class, 'views-ajax-link'), 'id' => 'views-rearrange-' . $type),
-      );
+        'attributes' => ['class' => [$class, 'views-ajax-link'], 'id' => 'views-rearrange-' . $type],
+      ];
     }
 
     // Render the array of links
-    $build['#actions'] = array(
+    $build['#actions'] = [
       '#type' => 'dropbutton',
       '#links' => $actions,
-      '#attributes' => array(
-        'class' => array('views-ui-settings-bucket-operations'),
-      ),
-    );
+      '#attributes' => [
+        'class' => ['views-ui-settings-bucket-operations'],
+      ],
+    ];
 
     if (!$executable->display_handler->isDefaultDisplay()) {
       if (!$executable->display_handler->isDefaulted($types[$type]['plural'])) {
@@ -1019,14 +1019,14 @@ public function getFormBucket(ViewUI $view, $type, $display) {
     static $relationships = NULL;
     if (!isset($relationships)) {
       // Get relationship labels.
-      $relationships = array();
+      $relationships = [];
       foreach ($executable->display_handler->getHandlers('relationship') as $id => $handler) {
         $relationships[$id] = $handler->adminLabel();
       }
     }
 
     // Filters can now be grouped so we do a little bit extra:
-    $groups = array();
+    $groups = [];
     $grouping = FALSE;
     if ($type == 'filter') {
       $group_info = $executable->display_handler->getOption('filter_groups');
@@ -1035,28 +1035,28 @@ public function getFormBucket(ViewUI $view, $type, $display) {
       // "OR" label next to items within the group.
       if (!empty($group_info['groups']) && (count($group_info['groups']) > 1 || current($group_info['groups']) == 'OR')) {
         $grouping = TRUE;
-        $groups = array(0 => array());
+        $groups = [0 => []];
       }
     }
 
-    $build['fields'] = array();
+    $build['fields'] = [];
 
     foreach ($executable->display_handler->getOption($types[$type]['plural']) as $id => $field) {
       // Build the option link for this handler ("Node: ID = article").
-      $build['fields'][$id] = array();
+      $build['fields'][$id] = [];
       $build['fields'][$id]['#theme'] = 'views_ui_display_tab_setting';
 
       $handler = $executable->display_handler->getHandler($type, $id);
       if ($handler->broken()) {
         $build['fields'][$id]['#class'][] = 'broken';
         $field_name = $handler->adminLabel();
-        $build['fields'][$id]['#link'] = $this->l($field_name, new Url('views_ui.form_handler', array(
+        $build['fields'][$id]['#link'] = $this->l($field_name, new Url('views_ui.form_handler', [
           'js' => 'nojs',
           'view' => $view->id(),
           'display_id' => $display['id'],
           'type' => $type,
           'id' => $id,
-        ), array('attributes' => array('class' => array('views-ajax-link')))));
+        ], ['attributes' => ['class' => ['views-ajax-link']]]));
         continue;
       }
 
@@ -1067,39 +1067,39 @@ public function getFormBucket(ViewUI $view, $type, $display) {
 
       $description = $handler->adminSummary();
       $link_text = $field_name . (empty($description) ? '' : " ($description)");
-      $link_attributes = array('class' => array('views-ajax-link'));
+      $link_attributes = ['class' => ['views-ajax-link']];
       if (!empty($field['exclude'])) {
         $link_attributes['class'][] = 'views-field-excluded';
         // Add a [hidden] marker, if the field is excluded.
         $link_text .= ' [' . $this->t('hidden') . ']';
       }
-      $build['fields'][$id]['#link'] = $this->l($link_text, new Url('views_ui.form_handler', array(
+      $build['fields'][$id]['#link'] = $this->l($link_text, new Url('views_ui.form_handler', [
         'js' => 'nojs',
         'view' => $view->id(),
         'display_id' => $display['id'],
         'type' => $type,
         'id' => $id,
-      ), array('attributes' => $link_attributes)));
+      ], ['attributes' => $link_attributes]));
       $build['fields'][$id]['#class'][] = Html::cleanCssIdentifier($display['id'] . '-' . $type . '-' . $id);
 
       if ($executable->display_handler->useGroupBy() && $handler->usesGroupBy()) {
-        $build['fields'][$id]['#settings_links'][] = $this->l(SafeMarkup::format('<span class="label">@text</span>', array('@text' => $this->t('Aggregation settings'))), new Url('views_ui.form_handler_group', array(
+        $build['fields'][$id]['#settings_links'][] = $this->l(SafeMarkup::format('<span class="label">@text</span>', ['@text' => $this->t('Aggregation settings')]), new Url('views_ui.form_handler_group', [
           'js' => 'nojs',
           'view' => $view->id(),
           'display_id' => $display['id'],
           'type' => $type,
           'id' => $id,
-        ), array('attributes' => array('class' => array('views-button-configure', 'views-ajax-link'), 'title' => $this->t('Aggregation settings')))));
+        ], ['attributes' => ['class' => ['views-button-configure', 'views-ajax-link'], 'title' => $this->t('Aggregation settings')]]));
       }
 
       if ($handler->hasExtraOptions()) {
-        $build['fields'][$id]['#settings_links'][] = $this->l(SafeMarkup::format('<span class="label">@text</span>', array('@text' => $this->t('Settings'))), new Url('views_ui.form_handler_extra', array(
+        $build['fields'][$id]['#settings_links'][] = $this->l(SafeMarkup::format('<span class="label">@text</span>', ['@text' => $this->t('Settings')]), new Url('views_ui.form_handler_extra', [
           'js' => 'nojs',
           'view' => $view->id(),
           'display_id' => $display['id'],
           'type' => $type,
           'id' => $id,
-        ), array('attributes' => array('class' => array('views-button-configure', 'views-ajax-link'), 'title' => $this->t('Settings')))));
+        ], ['attributes' => ['class' => ['views-button-configure', 'views-ajax-link'], 'title' => $this->t('Settings')]]));
       }
 
       if ($grouping) {
@@ -1116,15 +1116,15 @@ public function getFormBucket(ViewUI $view, $type, $display) {
     // If using grouping, re-order fields so that they show up properly in the list.
     if ($type == 'filter' && $grouping) {
       $store = $build['fields'];
-      $build['fields'] = array();
+      $build['fields'] = [];
       foreach ($groups as $gid => $contents) {
         // Display an operator between each group.
         if (!empty($build['fields'])) {
-          $build['fields'][] = array(
+          $build['fields'][] = [
             '#theme' => 'views_ui_display_tab_setting',
-            '#class' => array('views-group-text'),
+            '#class' => ['views-group-text'],
             '#link' => ($group_info['operator'] == 'OR' ? $this->t('OR') : $this->t('AND')),
-          );
+          ];
         }
         // Display an operator between each pair of filters within the group.
         $keys = array_keys($contents);
diff --git a/core/modules/views_ui/src/ViewFormBase.php b/core/modules/views_ui/src/ViewFormBase.php
index 1533b80caf4200419dcc10a8282d08d8a289e5f5..49cdc4955f2397fae98fe9f28132057817c5ebbb 100644
--- a/core/modules/views_ui/src/ViewFormBase.php
+++ b/core/modules/views_ui/src/ViewFormBase.php
@@ -88,7 +88,7 @@ public function getDisplayTabs(ViewUI $view) {
     $executable = $view->getExecutable();
     $executable->initDisplay();
     $display_id = $this->displayID;
-    $tabs = array();
+    $tabs = [];
 
     // Create a tab for each display.
     foreach ($view->get('display') as $id => $display) {
@@ -99,15 +99,15 @@ public function getDisplayTabs(ViewUI $view) {
         continue;
       }
 
-      $tabs[$id] = array(
+      $tabs[$id] = [
         '#theme' => 'menu_local_task',
         '#weight' => $display['position'],
-        '#link' => array(
+        '#link' => [
           'title' => $this->getDisplayLabel($view, $id),
-          'localized_options' => array(),
+          'localized_options' => [],
           'url' => $view->urlInfo('edit-display-form')->setRouteParameter('display_id', $id),
-        ),
-      );
+        ],
+      ];
       if (!empty($display['deleted'])) {
         $tabs[$id]['#link']['localized_options']['attributes']['class'][] = 'views-display-deleted-link';
       }
diff --git a/core/modules/views_ui/src/ViewListBuilder.php b/core/modules/views_ui/src/ViewListBuilder.php
index b38a15f75bdf9e0331fe6374c26dc1b001aa3f81..604426cab0df928b027b7ba63e5a949515da0a02 100644
--- a/core/modules/views_ui/src/ViewListBuilder.php
+++ b/core/modules/views_ui/src/ViewListBuilder.php
@@ -65,10 +65,10 @@ public function __construct(EntityTypeInterface $entity_type, EntityStorageInter
    * {@inheritdoc}
    */
   public function load() {
-    $entities = array(
-      'enabled' => array(),
-      'disabled' => array(),
-    );
+    $entities = [
+      'enabled' => [],
+      'disabled' => [],
+    ];
     foreach (parent::load() as $entity) {
       if ($entity->status()) {
         $entities['enabled'][] = $entity;
@@ -85,73 +85,73 @@ public function load() {
    */
   public function buildRow(EntityInterface $view) {
     $row = parent::buildRow($view);
-    return array(
-      'data' => array(
-        'view_name' => array(
-          'data' => array(
+    return [
+      'data' => [
+        'view_name' => [
+          'data' => [
             '#plain_text' => $view->label(),
-          ),
-        ),
-        'machine_name' => array(
-          'data' => array(
+          ],
+        ],
+        'machine_name' => [
+          'data' => [
             '#plain_text' => $view->id(),
-          ),
-        ),
-        'description' => array(
-          'data' => array(
+          ],
+        ],
+        'description' => [
+          'data' => [
             '#plain_text' => $view->get('description'),
-          ),
-        ),
-        'displays' => array(
-          'data' => array(
+          ],
+        ],
+        'displays' => [
+          'data' => [
             '#theme' => 'views_ui_view_displays_list',
             '#displays' => $this->getDisplaysList($view),
-          ),
-        ),
+          ],
+        ],
         'operations' => $row['operations'],
-      ),
-      '#attributes' => array(
-        'class' => array($view->status() ? 'views-ui-list-enabled' : 'views-ui-list-disabled'),
-      ),
-    );
+      ],
+      '#attributes' => [
+        'class' => [$view->status() ? 'views-ui-list-enabled' : 'views-ui-list-disabled'],
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildHeader() {
-    return array(
-      'view_name' => array(
+    return [
+      'view_name' => [
         'data' => $this->t('View name'),
-        '#attributes' => array(
-          'class' => array('views-ui-name'),
-        ),
-      ),
-      'machine_name' => array(
+        '#attributes' => [
+          'class' => ['views-ui-name'],
+        ],
+      ],
+      'machine_name' => [
         'data' => $this->t('Machine name'),
-        '#attributes' => array(
-          'class' => array('views-ui-machine-name'),
-        ),
-      ),
-      'description' => array(
+        '#attributes' => [
+          'class' => ['views-ui-machine-name'],
+        ],
+      ],
+      'description' => [
         'data' => $this->t('Description'),
-        '#attributes' => array(
-          'class' => array('views-ui-description'),
-        ),
-      ),
-      'displays' => array(
+        '#attributes' => [
+          'class' => ['views-ui-description'],
+        ],
+      ],
+      'displays' => [
         'data' => $this->t('Displays'),
-        '#attributes' => array(
-          'class' => array('views-ui-displays'),
-        ),
-      ),
-      'operations' => array(
+        '#attributes' => [
+          'class' => ['views-ui-displays'],
+        ],
+      ],
+      'operations' => [
         'data' => $this->t('Operations'),
-        '#attributes' => array(
-          'class' => array('views-ui-operations'),
-        ),
-      ),
-    );
+        '#attributes' => [
+          'class' => ['views-ui-operations'],
+        ],
+      ],
+    ];
   }
 
   /**
@@ -161,15 +161,15 @@ public function getDefaultOperations(EntityInterface $entity) {
     $operations = parent::getDefaultOperations($entity);
 
     if ($entity->hasLinkTemplate('duplicate-form')) {
-      $operations['duplicate'] = array(
+      $operations['duplicate'] = [
         'title' => $this->t('Duplicate'),
         'weight' => 15,
         'url' => $entity->urlInfo('duplicate-form'),
-      );
+      ];
     }
 
     // Add AJAX functionality to enable/disable operations.
-    foreach (array('enable', 'disable') as $op) {
+    foreach (['enable', 'disable'] as $op) {
       if (isset($operations[$op])) {
         $operations[$op]['url'] = $entity->urlInfo($op);
         // Enable and disable operations should use AJAX.
@@ -191,37 +191,37 @@ public function render() {
     $list['#attached']['library'][] = 'core/drupal.ajax';
     $list['#attached']['library'][] = 'views_ui/views_ui.listing';
 
-    $form['filters'] = array(
+    $form['filters'] = [
       '#type' => 'container',
-      '#attributes' => array(
-        'class' => array('table-filter', 'js-show'),
-      ),
-    );
+      '#attributes' => [
+        'class' => ['table-filter', 'js-show'],
+      ],
+    ];
 
-    $list['filters']['text'] = array(
+    $list['filters']['text'] = [
       '#type' => 'search',
       '#title' => $this->t('Filter'),
       '#title_display' => 'invisible',
       '#size' => 60,
       '#placeholder' => $this->t('Filter by view name, machine name, description, or display path'),
-      '#attributes' => array(
-        'class' => array('views-filter-text'),
+      '#attributes' => [
+        'class' => ['views-filter-text'],
         'data-table' => '.views-listing-table',
         'autocomplete' => 'off',
         'title' => $this->t('Enter a part of the view name, machine name, description, or display path to filter by.'),
-      ),
-    );
+      ],
+    ];
 
-    $list['enabled']['heading']['#markup'] = '<h2>' . $this->t('Enabled', array(), array('context' => 'Plural')) . '</h2>';
-    $list['disabled']['heading']['#markup'] = '<h2>' . $this->t('Disabled', array(), array('context' => 'Plural')) . '</h2>';
-    foreach (array('enabled', 'disabled') as $status) {
+    $list['enabled']['heading']['#markup'] = '<h2>' . $this->t('Enabled', [], ['context' => 'Plural']) . '</h2>';
+    $list['disabled']['heading']['#markup'] = '<h2>' . $this->t('Disabled', [], ['context' => 'Plural']) . '</h2>';
+    foreach (['enabled', 'disabled'] as $status) {
       $list[$status]['#type'] = 'container';
-      $list[$status]['#attributes'] = array('class' => array('views-list-section', $status));
-      $list[$status]['table'] = array(
+      $list[$status]['#attributes'] = ['class' => ['views-list-section', $status]];
+      $list[$status]['table'] = [
         '#theme' => 'views_ui_views_listing_table',
         '#headers' => $this->buildHeader(),
-        '#attributes' => array('class' => array('views-listing-table', $status)),
-      );
+        '#attributes' => ['class' => ['views-listing-table', $status]],
+      ];
       foreach ($entities[$status] as $entity) {
         $list[$status]['table']['#rows'][$entity->id()] = $this->buildRow($entity);
       }
@@ -244,7 +244,7 @@ public function render() {
    *   An array of display types that this view includes.
    */
   protected function getDisplaysList(EntityInterface $view) {
-    $displays = array();
+    $displays = [];
 
     $executable = $view->getExecutable();
     $executable->initDisplay();
@@ -263,10 +263,10 @@ protected function getDisplaysList(EntityInterface $view) {
             $rendered_path = '/' . $path;
           }
         }
-        $displays[] = array(
+        $displays[] = [
           'display' => $definition['admin'],
           'path' => $rendered_path,
-        );
+        ];
       }
     }
 
diff --git a/core/modules/views_ui/src/ViewPreviewForm.php b/core/modules/views_ui/src/ViewPreviewForm.php
index 7b779297deac60b9ee64bc8ec48a7efeb5c3d7d0..2cc25332efc78f253b1f9cbd08f33f2909798d32 100644
--- a/core/modules/views_ui/src/ViewPreviewForm.php
+++ b/core/modules/views_ui/src/ViewPreviewForm.php
@@ -22,43 +22,43 @@ public function form(array $form, FormStateInterface $form_state) {
 
     $form_state->disableCache();
 
-    $form['controls']['#attributes'] = array('class' => array('clearfix'));
+    $form['controls']['#attributes'] = ['class' => ['clearfix']];
 
-    $form['controls']['title'] = array(
+    $form['controls']['title'] = [
       '#prefix' => '<h2 class="view-preview-form__title">',
       '#markup' => $this->t('Preview'),
       '#suffix' => '</h2>',
-    );
+    ];
 
     // Add a checkbox controlling whether or not this display auto-previews.
-    $form['controls']['live_preview'] = array(
+    $form['controls']['live_preview'] = [
       '#type' => 'checkbox',
       '#id' => 'edit-displays-live-preview',
       '#title' => $this->t('Auto preview'),
       '#default_value' => \Drupal::config('views.settings')->get('ui.always_live_preview'),
-    );
+    ];
 
     // Add the arguments textfield
-    $form['controls']['view_args'] = array(
+    $form['controls']['view_args'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Preview with contextual filters:'),
-      '#description' => $this->t('Separate contextual filter values with a "/". For example, %example.', array('%example' => '40/12/10')),
+      '#description' => $this->t('Separate contextual filter values with a "/". For example, %example.', ['%example' => '40/12/10']),
       '#id' => 'preview-args',
-    );
+    ];
 
-    $args = array();
+    $args = [];
     if (!$form_state->isValueEmpty('view_args')) {
       $args = explode('/', $form_state->getValue('view_args'));
     }
 
     $user_input = $form_state->getUserInput();
     if ($form_state->get('show_preview') || !empty($user_input['js'])) {
-      $form['preview'] = array(
+      $form['preview'] = [
         '#weight' => 110,
-        '#theme_wrappers' => array('container'),
+        '#theme_wrappers' => ['container'],
         '#attributes' => ['id' => 'views-live-preview', 'class' => ['views-live-preview']],
         'preview' => $view->renderPreview($this->displayID, $args),
-      );
+      ];
     }
     $uri = $view->urlInfo('preview-form');
     $uri->setRouteParameter('display_id', $this->displayID);
@@ -72,27 +72,27 @@ public function form(array $form, FormStateInterface $form_state) {
    */
   protected function actions(array $form, FormStateInterface $form_state) {
     $view = $this->entity;
-    return array(
-      '#attributes' => array(
+    return [
+      '#attributes' => [
         'id' => 'preview-submit-wrapper',
-        'class' => array('preview-submit-wrapper')
-      ),
-      'button' => array(
+        'class' => ['preview-submit-wrapper']
+      ],
+      'button' => [
         '#type' => 'submit',
         '#value' => $this->t('Update preview'),
-        '#attributes' => array('class' => array('arguments-preview')),
-        '#submit' => array('::submitPreview'),
+        '#attributes' => ['class' => ['arguments-preview']],
+        '#submit' => ['::submitPreview'],
         '#id' => 'preview-submit',
-        '#ajax' => array(
+        '#ajax' => [
           'url' => Url::fromRoute('entity.view.preview_form', ['view' => $view->id(), 'display_id' => $this->displayID]),
           'wrapper' => 'views-preview-wrapper',
           'event' => 'click',
-          'progress' => array('type' => 'fullscreen'),
+          'progress' => ['type' => 'fullscreen'],
           'method' => 'replaceWith',
           'disable-refocus' => TRUE,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
diff --git a/core/modules/views_ui/src/ViewUI.php b/core/modules/views_ui/src/ViewUI.php
index cb222b0b44299d6ee59a28795cfe862ca60eb27f..b6841a84bc6da859f7b1a91656777e858cb6bed3 100644
--- a/core/modules/views_ui/src/ViewUI.php
+++ b/core/modules/views_ui/src/ViewUI.php
@@ -107,7 +107,7 @@ class ViewUI implements ViewEntityInterface {
    *
    * @var array
    */
-  public static $forms = array(
+  public static $forms = [
     'add-handler' => '\Drupal\views_ui\Form\Ajax\AddItem',
     'analyze' => '\Drupal\views_ui\Form\Ajax\Analyze',
     'handler' => '\Drupal\views_ui\Form\Ajax\ConfigHandler',
@@ -118,7 +118,7 @@ class ViewUI implements ViewEntityInterface {
     'rearrange' => '\Drupal\views_ui\Form\Ajax\Rearrange',
     'rearrange-filter' => '\Drupal\views_ui\Form\Ajax\RearrangeFilter',
     'reorder-displays' => '\Drupal\views_ui\Form\Ajax\ReorderDisplays',
-  );
+  ];
 
   /**
    * Whether the config is being created, updated or deleted through the
@@ -277,22 +277,22 @@ public function standardCancel($form, FormStateInterface $form_state) {
    * docblock outdated?
    */
   public function getStandardButtons(&$form, FormStateInterface $form_state, $form_id, $name = NULL) {
-    $form['actions'] = array(
+    $form['actions'] = [
       '#type' => 'actions',
-    );
+    ];
 
     if (empty($name)) {
       $name = t('Apply');
       if (!empty($this->stack) && count($this->stack) > 1) {
         $name = t('Apply and continue');
       }
-      $names = array(t('Apply'), t('Apply and continue'));
+      $names = [t('Apply'), t('Apply and continue')];
     }
 
     // Forms that are purely informational set an ok_button flag, so we know not
     // to create an "Apply" button for them.
     if (!$form_state->get('ok_button')) {
-      $form['actions']['submit'] = array(
+      $form['actions']['submit'] = [
         '#type' => 'submit',
         '#value' => $name,
         '#id' => 'edit-submit-' . Html::getUniqueId($form_id),
@@ -301,9 +301,9 @@ public function getStandardButtons(&$form, FormStateInterface $form_state, $form
         // the current display. Since we have no way of knowing at this point
         // which display the user wants to update, views_ui_standard_submit will
         // take care of running the regular submit handler as appropriate.
-        '#submit' => array(array($this, 'standardSubmit')),
+        '#submit' => [[$this, 'standardSubmit']],
         '#button_type' => 'primary',
-      );
+      ];
       // Form API button click detection requires the button's #value to be the
       // same between the form build of the initial page request, and the
       // initial form build of the request processing the form submission.
@@ -315,21 +315,21 @@ public function getStandardButtons(&$form, FormStateInterface $form_state, $form
       // button labels.
       if (isset($names)) {
         $form['actions']['submit']['#values'] = $names;
-        $form['actions']['submit']['#process'] = array_merge(array('views_ui_form_button_was_clicked'), \Drupal::service('element_info')->getInfoProperty($form['actions']['submit']['#type'], '#process', array()));
+        $form['actions']['submit']['#process'] = array_merge(['views_ui_form_button_was_clicked'], \Drupal::service('element_info')->getInfoProperty($form['actions']['submit']['#type'], '#process', []));
       }
       // If a validation handler exists for the form, assign it to this button.
       $form['actions']['submit']['#validate'][] = [$form_state->getFormObject(), 'validateForm'];
     }
 
     // Create a "Cancel" button. For purely informational forms, label it "OK".
-    $cancel_submit = function_exists($form_id . '_cancel') ? $form_id . '_cancel' : array($this, 'standardCancel');
-    $form['actions']['cancel'] = array(
+    $cancel_submit = function_exists($form_id . '_cancel') ? $form_id . '_cancel' : [$this, 'standardCancel'];
+    $form['actions']['cancel'] = [
       '#type' => 'submit',
       '#value' => !$form_state->get('ok_button') ? t('Cancel') : t('Ok'),
-      '#submit' => array($cancel_submit),
-      '#validate' => array(),
-      '#limit_validation_errors' => array(),
-    );
+      '#submit' => [$cancel_submit],
+      '#validate' => [],
+      '#limit_validation_errors' => [],
+    ];
 
     // Compatibility, to be removed later: // TODO: When is "later"?
     // We used to set these items on the form, but now we want them on the $form_state:
@@ -348,11 +348,11 @@ public function getStandardButtons(&$form, FormStateInterface $form_state, $form
    */
   public function getOverrideValues($form, FormStateInterface $form_state) {
     // Make sure the dropdown exists in the first place.
-    if ($form_state->hasValue(array('override', 'dropdown'))) {
+    if ($form_state->hasValue(['override', 'dropdown'])) {
       // #default_value is used to determine whether it was the default value or not.
       // So the available options are: $display, 'default' and 'default_revert', not 'defaults'.
       $was_defaulted = ($form['override']['dropdown']['#default_value'] === 'defaults');
-      $dropdown = $form_state->getValue(array('override', 'dropdown'));
+      $dropdown = $form_state->getValue(['override', 'dropdown']);
       $is_defaulted = ($dropdown === 'default');
       $revert = ($dropdown === 'default_revert');
 
@@ -369,7 +369,7 @@ public function getOverrideValues($form, FormStateInterface $form_state) {
       $revert = FALSE;
     }
 
-    return array($was_defaulted, $is_defaulted, $revert);
+    return [$was_defaulted, $is_defaulted, $revert];
   }
 
   /**
@@ -383,10 +383,10 @@ public function addFormToStack($key, $display_id, $type, $id = NULL, $top = FALS
     Html::resetSeenIds();
 
     if (empty($this->stack)) {
-      $this->stack = array();
+      $this->stack = [];
     }
 
-    $stack = array(implode('-', array_filter(array($key, $this->id(), $display_id, $type, $id))), $key, $display_id, $type, $id);
+    $stack = [implode('-', array_filter([$key, $this->id(), $display_id, $type, $id])), $key, $display_id, $type, $id];
     // If we're being asked to add this form to the bottom of the stack, no
     // special logic is required. Our work is equally easy if we were asked to add
     // to the top of the stack, but there's nothing in it yet.
@@ -463,10 +463,10 @@ public function submitItemAdd($form, FormStateInterface $form_state) {
         if (isset($types[$type]['type'])) {
           $key = $types[$type]['type'];
         }
-        $item = array(
+        $item = [
           'table' => $table,
           'field' => $field,
-        );
+        ];
         $handler = Views::handlerManager($key)->getHandler($item);
         if ($this->getExecutable()->displayHandlers->get('default')->useGroupBy() && $handler->usesGroupBy()) {
           $this->addFormToStack('handler-group', $display_id, $type, $id);
@@ -512,7 +512,7 @@ public function endQueryCapture() {
     $this->additionalQueries = $queries;
   }
 
-  public function renderPreview($display_id, $args = array()) {
+  public function renderPreview($display_id, $args = []) {
     // Save the current path so it can be restored before returning from this function.
     $request_stack = \Drupal::requestStack();
     $current_request = $request_stack->getCurrentRequest();
@@ -531,7 +531,7 @@ public function renderPreview($display_id, $args = array()) {
 
     $combined = $show_query && $show_stats;
 
-    $rows = array('query' => array(), 'statistics' => array());
+    $rows = ['query' => [], 'statistics' => []];
 
     $errors = $executable->validate();
     $executable->destroy();
@@ -545,7 +545,7 @@ public function renderPreview($display_id, $args = array()) {
       // have some input in the query parameters, so we merge request() and
       // query() to ensure we get it all.
       $exposed_input = array_merge(\Drupal::request()->request->all(), \Drupal::request()->query->all());
-      foreach (array('view_name', 'view_display_id', 'view_args', 'view_path', 'view_dom_id', 'pager_element', 'view_base_path', AjaxResponseSubscriber::AJAX_REQUEST_PARAMETER, 'ajax_page_state', 'form_id', 'form_build_id', 'form_token') as $key) {
+      foreach (['view_name', 'view_display_id', 'view_args', 'view_path', 'view_dom_id', 'pager_element', 'view_base_path', AjaxResponseSubscriber::AJAX_REQUEST_PARAMETER, 'ajax_page_state', 'form_id', 'form_build_id', 'form_token'] as $key) {
         if (isset($exposed_input[$key])) {
           unset($exposed_input[$key]);
         }
@@ -554,7 +554,7 @@ public function renderPreview($display_id, $args = array()) {
 
       if (!$executable->setDisplay($display_id)) {
         return [
-          '#markup' => t('Invalid display id @display', array('@display' => $display_id)),
+          '#markup' => t('Invalid display id @display', ['@display' => $display_id]),
         ];
       }
 
@@ -620,76 +620,76 @@ public function renderPreview($display_id, $args = array()) {
           if ($show_query) {
             $query_string = $executable->build_info['query'];
             // Only the sql default class has a method getArguments.
-            $quoted = array();
+            $quoted = [];
 
             if ($executable->query instanceof Sql) {
               $quoted = $query_string->getArguments();
               $connection = Database::getConnection();
               foreach ($quoted as $key => $val) {
                 if (is_array($val)) {
-                  $quoted[$key] = implode(', ', array_map(array($connection, 'quote'), $val));
+                  $quoted[$key] = implode(', ', array_map([$connection, 'quote'], $val));
                 }
                 else {
                   $quoted[$key] = $connection->quote($val);
                 }
               }
             }
-            $rows['query'][] = array(
-              array(
-                'data' => array(
+            $rows['query'][] = [
+              [
+                'data' => [
                   '#type' => 'inline_template',
                   '#template' => "<strong>{% trans 'Query' %}</strong>",
-                ),
-              ),
-              array(
-                'data' => array(
+                ],
+              ],
+              [
+                'data' => [
                   '#type' => 'inline_template',
                   '#template' => '<pre>{{ query }}</pre>',
-                  '#context' => array('query' => strtr($query_string, $quoted)),
-                ),
-              ),
-            );
+                  '#context' => ['query' => strtr($query_string, $quoted)],
+                ],
+              ],
+            ];
             if (!empty($this->additionalQueries)) {
-              $queries[] = array(
+              $queries[] = [
                 '#prefix' => '<strong>',
                 '#markup' => t('These queries were run during view rendering:'),
                 '#suffix' => '</strong>',
-              );
+              ];
               foreach ($this->additionalQueries as $query) {
                 $query_string = strtr($query['query'], $query['args']);
-                $queries[] = array(
+                $queries[] = [
                   '#prefix' => "\n",
-                  '#markup' => t('[@time ms] @query', array('@time' => round($query['time'] * 100000, 1) / 100000.0, '@query' => $query_string)),
-                );
+                  '#markup' => t('[@time ms] @query', ['@time' => round($query['time'] * 100000, 1) / 100000.0, '@query' => $query_string]),
+                ];
               }
 
-              $rows['query'][] = array(
-                array(
-                  'data' => array(
+              $rows['query'][] = [
+                [
+                  'data' => [
                     '#type' => 'inline_template',
                     '#template' => "<strong>{% trans 'Other queries' %}</strong>",
-                  ),
-                ),
-                array(
-                  'data' => array(
+                  ],
+                ],
+                [
+                  'data' => [
                     '#prefix' => '<pre>',
                      'queries' => $queries,
                      '#suffix' => '</pre>',
-                    ),
-                ),
-              );
+                    ],
+                ],
+              ];
             }
           }
           if ($show_info) {
-            $rows['query'][] = array(
-              array(
-                'data' => array(
+            $rows['query'][] = [
+              [
+                'data' => [
                   '#type' => 'inline_template',
                   '#template' => "<strong>{% trans 'Title' %}</strong>",
-                ),
-              ),
+                ],
+              ],
               Xss::filterAdmin($executable->getTitle()),
-            );
+            ];
             if (isset($path)) {
               // @todo Views should expect and store a leading /. See:
               //   https://www.drupal.org/node/2423913
@@ -698,51 +698,51 @@ public function renderPreview($display_id, $args = array()) {
             else {
               $path = t('This display has no path.');
             }
-            $rows['query'][] = array(
-              array(
-                'data' => array(
+            $rows['query'][] = [
+              [
+                'data' => [
                   '#prefix' => '<strong>',
                   '#markup' => t('Path'),
                   '#suffix' => '</strong>',
-                ),
-              ),
-              array(
-                'data' => array(
+                ],
+              ],
+              [
+                'data' => [
                   '#markup' => $path,
-                ),
-              )
-            );
+                ],
+              ]
+            ];
           }
           if ($show_stats) {
-            $rows['statistics'][] = array(
-              array(
-                'data' => array(
+            $rows['statistics'][] = [
+              [
+                'data' => [
                   '#type' => 'inline_template',
                   '#template' => "<strong>{% trans 'Query build time' %}</strong>",
-                ),
-              ),
-              t('@time ms', array('@time' => intval($executable->build_time * 100000) / 100)),
-            );
-
-            $rows['statistics'][] = array(
-              array(
-                'data' => array(
+                ],
+              ],
+              t('@time ms', ['@time' => intval($executable->build_time * 100000) / 100]),
+            ];
+
+            $rows['statistics'][] = [
+              [
+                'data' => [
                   '#type' => 'inline_template',
                   '#template' => "<strong>{% trans 'Query execute time' %}</strong>",
-                ),
-              ),
-              t('@time ms', array('@time' => intval($executable->execute_time * 100000) / 100)),
-            );
-
-            $rows['statistics'][] = array(
-              array(
-                'data' => array(
+                ],
+              ],
+              t('@time ms', ['@time' => intval($executable->execute_time * 100000) / 100]),
+            ];
+
+            $rows['statistics'][] = [
+              [
+                'data' => [
                   '#type' => 'inline_template',
                   '#template' => "<strong>{% trans 'View render time' %}</strong>",
-                ),
-              ),
-              t('@time ms', array('@time' => intval($this->render_time * 100) / 100)),
-            );
+                ],
+              ],
+              t('@time ms', ['@time' => intval($this->render_time * 100) / 100]),
+            ];
           }
           \Drupal::moduleHandler()->alter('views_preview_info', $rows, $executable);
         }
@@ -750,36 +750,36 @@ public function renderPreview($display_id, $args = array()) {
           // No query was run. Display that information in place of either the
           // query or the performance statistics, whichever comes first.
           if ($combined || ($show_location === 'above')) {
-            $rows['query'][] = array(
-              array(
-                'data' => array(
+            $rows['query'][] = [
+              [
+                'data' => [
                   '#prefix' => '<strong>',
                   '#markup' => t('Query'),
                   '#suffix' => '</strong>',
-                ),
-              ),
-              array(
-                'data' => array(
+                ],
+              ],
+              [
+                'data' => [
                   '#markup' => t('No query was run'),
-                ),
-              ),
-            );
+                ],
+              ],
+            ];
           }
           else {
-            $rows['statistics'][] = array(
-              array(
-                'data' => array(
+            $rows['statistics'][] = [
+              [
+                'data' => [
                   '#prefix' => '<strong>',
                   '#markup' => t('Query'),
                   '#suffix' => '</strong>',
-                ),
-              ),
-              array(
-                'data' => array(
+                ],
+              ],
+              [
+                'data' => [
                   '#markup' => t('No query was run'),
-                ),
-              ),
-            );
+                ],
+              ],
+            ];
           }
         }
       }
@@ -795,12 +795,12 @@ public function renderPreview($display_id, $args = array()) {
 
     // Assemble the preview, the query info, and the query statistics in the
     // requested order.
-    $table = array(
+    $table = [
       '#type' => 'table',
       '#prefix' => '<div class="views-query-info">',
       '#suffix' => '</div>',
       '#rows' => array_merge($rows['query'], $rows['statistics']),
-    );
+    ];
 
     if ($show_location == 'above') {
       $output = [
@@ -843,7 +843,7 @@ public function getFormProgress() {
       $current = reset($keys) + 1;
       $total = end($keys) + 1;
       if ($total > 1) {
-        $progress = array();
+        $progress = [];
         $progress['current'] = $current;
         $progress['total'] = $total;
       }
@@ -892,7 +892,7 @@ public function isLocked() {
    * Passes through all unknown calls onto the storage object.
    */
   public function __call($method, $args) {
-    return call_user_func_array(array($this->storage, $method), $args);
+    return call_user_func_array([$this->storage, $method], $args);
   }
 
   /**
@@ -968,7 +968,7 @@ public static function loadMultiple(array $ids = NULL) {
   /**
    * {@inheritdoc}
    */
-  public static function create(array $values = array()) {
+  public static function create(array $values = []) {
     return View::create($values);
   }
 
@@ -1167,7 +1167,7 @@ public function referencedEntities() {
   /**
    * {@inheritdoc}
    */
-  public function url($rel = 'edit-form', $options = array()) {
+  public function url($rel = 'edit-form', $options = []) {
     return $this->storage->url($rel, $options);
   }
 
diff --git a/core/modules/views_ui/tests/src/Kernel/TagTest.php b/core/modules/views_ui/tests/src/Kernel/TagTest.php
index fda2e2852aed0f1fae0196d868eb650e100a8311..294e48158f0c5a17123eb3677077868f600b1c43 100644
--- a/core/modules/views_ui/tests/src/Kernel/TagTest.php
+++ b/core/modules/views_ui/tests/src/Kernel/TagTest.php
@@ -19,7 +19,7 @@ class TagTest extends ViewsKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('views', 'views_ui', 'user');
+  public static $modules = ['views', 'views_ui', 'user'];
 
   /**
    * Tests the views_ui_autocomplete_tag function.
@@ -28,12 +28,12 @@ public function testViewsUiAutocompleteTag() {
     \Drupal::moduleHandler()->loadInclude('views_ui', 'inc', 'admin');
 
     // Save 15 views with a tag.
-    $tags = array();
+    $tags = [];
     for ($i = 0; $i < 16; $i++) {
       $suffix = $i % 2 ? 'odd' : 'even';
       $tag = 'autocomplete_tag_test_' . $suffix . $this->randomMachineName();
       $tags[] = $tag;
-      View::create(array('tag' => $tag, 'id' => $this->randomMachineName()))->save();
+      View::create(['tag' => $tag, 'id' => $this->randomMachineName()])->save();
     }
 
     // Make sure just ten results are returns.
@@ -46,7 +46,7 @@ public function testViewsUiAutocompleteTag() {
 
     // Make sure the returned array has the proper format.
     $suggestions = array_map(function ($tag) {
-      return array('value' => $tag, 'label' => Html::escape($tag));
+      return ['value' => $tag, 'label' => Html::escape($tag)];
     }, $tags);
     foreach ($matches as $match) {
       $this->assertTrue(in_array($match, $suggestions), 'Make sure the returned array has the proper format.');
@@ -59,7 +59,7 @@ public function testViewsUiAutocompleteTag() {
     $matches = (array) json_decode($result->getContent(), TRUE);
     $this->assertEqual(count($matches), 8, 'Make sure that only a subset is returned.');
     foreach ($matches as $tag) {
-      $this->assertTrue(array_search($tag['value'], $tags) !== FALSE, format_string('Make sure the returned tag @tag actually exists.', array('@tag' => $tag['value'])));
+      $this->assertTrue(array_search($tag['value'], $tags) !== FALSE, format_string('Make sure the returned tag @tag actually exists.', ['@tag' => $tag['value']]));
     }
 
     // Make sure an invalid result doesn't return anything.
diff --git a/core/modules/views_ui/tests/src/Unit/Form/Ajax/RearrangeFilterTest.php b/core/modules/views_ui/tests/src/Unit/Form/Ajax/RearrangeFilterTest.php
index bb8eb77398ea74c808cfd3f319423bb0d04d7d84..b2d3f96ab6268be1a8d095ec5de745de505606db 100644
--- a/core/modules/views_ui/tests/src/Unit/Form/Ajax/RearrangeFilterTest.php
+++ b/core/modules/views_ui/tests/src/Unit/Form/Ajax/RearrangeFilterTest.php
@@ -17,8 +17,8 @@ class RearrangeFilterTest extends UnitTestCase {
    */
   public function testStaticMethods() {
     // Test the RearrangeFilter::arrayKeyPlus method.
-    $original = array(0 => 'one', 1 => 'two', 2 => 'three');
-    $expected = array(1 => 'one', 2 => 'two', 3 => 'three');
+    $original = [0 => 'one', 1 => 'two', 2 => 'three'];
+    $expected = [1 => 'one', 2 => 'two', 3 => 'three'];
     $this->assertSame(RearrangeFilter::arrayKeyPlus($original), $expected);
   }
 
diff --git a/core/modules/views_ui/tests/src/Unit/ViewListBuilderTest.php b/core/modules/views_ui/tests/src/Unit/ViewListBuilderTest.php
index 9b646964eb04dec4228eb13fb782b5c99628345b..23cc7a8e65d126cd7867ead78bd6599db26eff3f 100644
--- a/core/modules/views_ui/tests/src/Unit/ViewListBuilderTest.php
+++ b/core/modules/views_ui/tests/src/Unit/ViewListBuilderTest.php
@@ -38,54 +38,54 @@ public function testBuildRowEntityList() {
 
     $display_manager->expects($this->any())
       ->method('getDefinition')
-      ->will($this->returnValueMap(array(
-        array(
+      ->will($this->returnValueMap([
+        [
           'default',
           TRUE,
-          array(
+          [
             'id' => 'default',
             'title' => 'Master',
             'theme' => 'views_view',
             'no_ui' => TRUE,
             'admin' => '',
-          )
-        ),
-        array(
+          ]
+        ],
+        [
           'page',
           TRUE,
-          array(
+          [
             'id' => 'page',
             'title' => 'Page',
             'uses_menu_links' => TRUE,
             'uses_route' => TRUE,
-            'contextual_links_locations' => array('page'),
+            'contextual_links_locations' => ['page'],
             'theme' => 'views_view',
             'admin' => 'Page admin label',
-          )
-        ),
-        array(
+          ]
+        ],
+        [
           'embed',
           TRUE,
-          array(
+          [
             'id' => 'embed',
             'title' => 'embed',
             'theme' => 'views_view',
             'admin' => 'Embed admin label',
-          )
-        ),
-      )));
+          ]
+        ],
+      ]));
 
 
     $default_display = $this->getMock('Drupal\views\Plugin\views\display\DefaultDisplay',
-      array('initDisplay'),
-      array(array(), 'default', $display_manager->getDefinition('default'))
+      ['initDisplay'],
+      [[], 'default', $display_manager->getDefinition('default')]
     );
     $route_provider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
     $state = $this->getMock('\Drupal\Core\State\StateInterface');
     $menu_storage = $this->getMock('\Drupal\Core\Entity\EntityStorageInterface');
     $page_display = $this->getMock('Drupal\views\Plugin\views\display\Page',
-      array('initDisplay', 'getPath'),
-      array(array(), 'default', $display_manager->getDefinition('page'), $route_provider, $state, $menu_storage)
+      ['initDisplay', 'getPath'],
+      [[], 'default', $display_manager->getDefinition('page'), $route_provider, $state, $menu_storage]
     );
     $page_display->expects($this->any())
       ->method('getPath')
@@ -94,11 +94,11 @@ public function testBuildRowEntityList() {
         $this->returnValue('<object>malformed_path</object>'),
         $this->returnValue('<script>alert("placeholder_page/%")</script>')));
 
-    $embed_display = $this->getMock('Drupal\views\Plugin\views\display\Embed', array('initDisplay'),
-      array(array(), 'default', $display_manager->getDefinition('embed'))
+    $embed_display = $this->getMock('Drupal\views\Plugin\views\display\Embed', ['initDisplay'],
+      [[], 'default', $display_manager->getDefinition('embed')]
     );
 
-    $values = array();
+    $values = [];
     $values['status'] = FALSE;
     $values['display']['default']['id'] = 'default';
     $values['display']['default']['display_title'] = 'Display';
@@ -125,13 +125,13 @@ public function testBuildRowEntityList() {
 
     $display_manager->expects($this->any())
       ->method('createInstance')
-      ->will($this->returnValueMap(array(
-        array('default', $values['display']['default'], $default_display),
-        array('page', $values['display']['page_1'], $page_display),
-        array('page', $values['display']['page_2'], $page_display),
-        array('page', $values['display']['page_3'], $page_display),
-        array('embed', $values['display']['embed'], $embed_display),
-      )));
+      ->will($this->returnValueMap([
+        ['default', $values['display']['default'], $default_display],
+        ['page', $values['display']['page_1'], $page_display],
+        ['page', $values['display']['page_2'], $page_display],
+        ['page', $values['display']['page_3'], $page_display],
+        ['embed', $values['display']['embed'], $embed_display],
+      ]));
 
     $container = new ContainerBuilder();
     $user = $this->getMock('Drupal\Core\Session\AccountInterface');
@@ -159,24 +159,24 @@ public function testBuildRowEntityList() {
     $row = $view_list_builder->buildRow($view);
 
     // Expected output array for view's displays.
-    $expected_displays = array(
-      '0' => array(
+    $expected_displays = [
+      '0' => [
         'display' => 'Embed admin label',
         'path' => FALSE,
-      ),
-      '1' => array(
+      ],
+      '1' => [
         'display' => 'Page admin label',
         'path' => '/<object>malformed_path</object>',
-      ),
-      '2' => array(
+      ],
+      '2' => [
         'display' => 'Page admin label',
         'path' => '/<script>alert("placeholder_page/%")</script>',
-      ),
-      '3' => array(
+      ],
+      '3' => [
         'display' => 'Page admin label',
         'path' => '/test_page',
-      ),
-    );
+      ],
+    ];
 
     // Compare the expected and generated output.
     $this->assertEquals($expected_displays, $row['data']['displays']['data']['#displays']);
@@ -187,7 +187,7 @@ public function testBuildRowEntityList() {
 class TestViewListBuilder extends ViewListBuilder {
 
   public function buildOperations(EntityInterface $entity) {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/modules/views_ui/tests/src/Unit/ViewUIObjectTest.php b/core/modules/views_ui/tests/src/Unit/ViewUIObjectTest.php
index 293bfebeaf446db65ae6fd81f8624f05b26b0580..f49b25a9fc84a398fae0c3b1c7db70caad64cc9f 100644
--- a/core/modules/views_ui/tests/src/Unit/ViewUIObjectTest.php
+++ b/core/modules/views_ui/tests/src/Unit/ViewUIObjectTest.php
@@ -18,14 +18,14 @@ class ViewUIObjectTest extends UnitTestCase {
    * Tests entity method decoration.
    */
   public function testEntityDecoration() {
-    $method_args = array();
-    $method_args['setOriginalId'] = array(12);
-    $method_args['setStatus'] = array(TRUE);
-    $method_args['enforceIsNew'] = array(FALSE);
-    $method_args['label'] = array(LanguageInterface::LANGCODE_NOT_SPECIFIED);
+    $method_args = [];
+    $method_args['setOriginalId'] = [12];
+    $method_args['setStatus'] = [TRUE];
+    $method_args['enforceIsNew'] = [FALSE];
+    $method_args['label'] = [LanguageInterface::LANGCODE_NOT_SPECIFIED];
 
     $reflection = new \ReflectionClass('Drupal\Core\Config\Entity\ConfigEntityInterface');
-    $interface_methods = array();
+    $interface_methods = [];
     foreach ($reflection->getMethods() as $reflection_method) {
       $interface_methods[] = $reflection_method->getName();
 
@@ -38,15 +38,15 @@ public function testEntityDecoration() {
       // dependency management.
       if (!in_array($reflection_method->getName(), ['isNew', 'isSyncing', 'isUninstalling', 'getConfigDependencyKey', 'getConfigDependencyName', 'calculateDependencies'])) {
         if (count($reflection_method->getParameters()) == 0) {
-          $method_args[$reflection_method->getName()] = array();
+          $method_args[$reflection_method->getName()] = [];
         }
       }
     }
 
-    $storage = $this->getMock('Drupal\views\Entity\View', $interface_methods, array(array(), 'view'));
+    $storage = $this->getMock('Drupal\views\Entity\View', $interface_methods, [[], 'view']);
     $executable = $this->getMockBuilder('Drupal\views\ViewExecutable')
       ->disableOriginalConstructor()
-      ->setConstructorArgs(array($storage))
+      ->setConstructorArgs([$storage])
       ->getMock();
     $storage->set('executable', $executable);
 
@@ -58,7 +58,7 @@ public function testEntityDecoration() {
       foreach ($args as $arg) {
         $method_mock->with($this->equalTo($arg));
       }
-      call_user_func_array(array($view_ui, $method), $args);
+      call_user_func_array([$view_ui, $method], $args);
     }
 
     $storage->expects($this->once())
@@ -70,10 +70,10 @@ public function testEntityDecoration() {
    * Tests the isLocked method.
    */
   public function testIsLocked() {
-    $storage = $this->getMock('Drupal\views\Entity\View', array(), array(array(), 'view'));
+    $storage = $this->getMock('Drupal\views\Entity\View', [], [[], 'view']);
     $executable = $this->getMockBuilder('Drupal\views\ViewExecutable')
       ->disableOriginalConstructor()
-      ->setConstructorArgs(array($storage))
+      ->setConstructorArgs([$storage])
       ->getMock();
     $storage->set('executable', $executable);
     $account = $this->getMock('Drupal\Core\Session\AccountInterface');
@@ -91,20 +91,20 @@ public function testIsLocked() {
     $this->assertFalse($view_ui->isLocked());
 
     // Set the lock object with a different owner than the mocked account above.
-    $lock = (object) array(
+    $lock = (object) [
       'owner' => 2,
-      'data' => array(),
+      'data' => [],
       'updated' => (int) $_SERVER['REQUEST_TIME'],
-    );
+    ];
     $view_ui->lock = $lock;
     $this->assertTrue($view_ui->isLocked());
 
     // Set a different lock object with the same object as the mocked account.
-    $lock = (object) array(
+    $lock = (object) [
       'owner' => 1,
-      'data' => array(),
+      'data' => [],
       'updated' => (int) $_SERVER['REQUEST_TIME'],
-    );
+    ];
     $view_ui->lock = $lock;
     $this->assertFalse($view_ui->isLocked());
   }
diff --git a/core/modules/views_ui/views_ui.module b/core/modules/views_ui/views_ui.module
index 511bcf942dbd3d8fe484c6027d0ab4b3b777fd33..15f85e3a023b3aebf8afc26eafd987cea7f7ec93 100644
--- a/core/modules/views_ui/views_ui.module
+++ b/core/modules/views_ui/views_ui.module
@@ -19,15 +19,15 @@ function views_ui_help($route_name, RouteMatchInterface $route_match) {
     case 'help.page.views_ui':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Views UI module provides an interface for managing views for the <a href=":views">Views module</a>. For more information, see the <a href=":handbook">online documentation for the Views UI module</a>.', array(':views' => \Drupal::url('help.page', array('name' => 'views')), ':handbook' => 'https://www.drupal.org/documentation/modules/views_ui')) . '</p>';
+      $output .= '<p>' . t('The Views UI module provides an interface for managing views for the <a href=":views">Views module</a>. For more information, see the <a href=":handbook">online documentation for the Views UI module</a>.', [':views' => \Drupal::url('help.page', ['name' => 'views']), ':handbook' => 'https://www.drupal.org/documentation/modules/views_ui']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Creating and managing views') . '</dt>';
-      $output .= '<dd>' . t('Views can be created from the <a href=":list">Views list page</a> by using the "Add view" action. Existing views can be managed from the <a href=":list">Views list page</a> by locating the view in the "Enabled" or "Disabled" list and selecting the desired operation action, for example "Edit".', array(':list' => \Drupal::url('entity.view.collection', array('name' => 'views_ui')))) . '</dd>';
+      $output .= '<dd>' . t('Views can be created from the <a href=":list">Views list page</a> by using the "Add view" action. Existing views can be managed from the <a href=":list">Views list page</a> by locating the view in the "Enabled" or "Disabled" list and selecting the desired operation action, for example "Edit".', [':list' => \Drupal::url('entity.view.collection', ['name' => 'views_ui'])]) . '</dd>';
       $output .= '<dt>' . t('Enabling and disabling views') . '<dt>';
-      $output .= '<dd>' . t('Views can be enabled or disabled from the <a href=":list">Views list page</a>. To enable a view, find the view within the "Disabled" list and select the "Enable" operation. To disable a view find the view within the "Enabled" list and select the "Disable" operation.', array(':list' => \Drupal::url('entity.view.collection', array('name' => 'views_ui')))) . '</dd>';
+      $output .= '<dd>' . t('Views can be enabled or disabled from the <a href=":list">Views list page</a>. To enable a view, find the view within the "Disabled" list and select the "Enable" operation. To disable a view find the view within the "Enabled" list and select the "Disable" operation.', [':list' => \Drupal::url('entity.view.collection', ['name' => 'views_ui'])]) . '</dd>';
       $output .= '<dt>' . t('Exporting and importing views') . '</dt>';
-      $output .= '<dd>' . t('Views can be exported and imported as configuration files by using the <a href=":config">Configuration Manager module</a>.', array(':config' => (\Drupal::moduleHandler()->moduleExists('config')) ? \Drupal::url('help.page', array('name' => 'config')) : '#')) . '</dd>';
+      $output .= '<dd>' . t('Views can be exported and imported as configuration files by using the <a href=":config">Configuration Manager module</a>.', [':config' => (\Drupal::moduleHandler()->moduleExists('config')) ? \Drupal::url('help.page', ['name' => 'config']) : '#']) . '</dd>';
       $output .= '</dl>';
       return $output;
   }
@@ -61,69 +61,69 @@ function views_ui_entity_type_build(array &$entity_types) {
  * Implements hook_theme().
  */
 function views_ui_theme() {
-  return array(
+  return [
     // edit a view
-    'views_ui_display_tab_setting' => array(
-      'variables' => array('description' => '', 'link' => '', 'settings_links' => array(), 'overridden' => FALSE, 'defaulted' => FALSE, 'description_separator' => TRUE, 'class' => array()),
+    'views_ui_display_tab_setting' => [
+      'variables' => ['description' => '', 'link' => '', 'settings_links' => [], 'overridden' => FALSE, 'defaulted' => FALSE, 'description_separator' => TRUE, 'class' => []],
       'file' => 'views_ui.theme.inc',
-    ),
-    'views_ui_display_tab_bucket' => array(
+    ],
+    'views_ui_display_tab_bucket' => [
       'render element' => 'element',
       'file' => 'views_ui.theme.inc',
-    ),
-    'views_ui_rearrange_filter_form' => array(
+    ],
+    'views_ui_rearrange_filter_form' => [
       'render element' => 'form',
       'file' => 'views_ui.theme.inc',
-    ),
-    'views_ui_expose_filter_form' => array(
+    ],
+    'views_ui_expose_filter_form' => [
       'render element' => 'form',
       'file' => 'views_ui.theme.inc',
-    ),
+    ],
 
     // Legacy theme hook for displaying views info.
-    'views_ui_view_info' => array(
-      'variables' => array('view' => NULL, 'displays' => NULL),
+    'views_ui_view_info' => [
+      'variables' => ['view' => NULL, 'displays' => NULL],
       'file' => 'views_ui.theme.inc',
-    ),
+    ],
 
     // List views.
-    'views_ui_views_listing_table' => array(
-      'variables' => array(
+    'views_ui_views_listing_table' => [
+      'variables' => [
         'headers' => NULL,
         'rows' => NULL,
-        'attributes' => array(),
-      ),
+        'attributes' => [],
+      ],
       'file' => 'views_ui.theme.inc',
-    ),
-    'views_ui_view_displays_list' => array(
-      'variables' => array('displays' => array()),
-    ),
+    ],
+    'views_ui_view_displays_list' => [
+      'variables' => ['displays' => []],
+    ],
 
     // Group of filters.
-    'views_ui_build_group_filter_form' => array(
+    'views_ui_build_group_filter_form' => [
       'render element' => 'form',
       'file' => 'views_ui.theme.inc',
-    ),
+    ],
 
     // On behalf of a plugin
-    'views_ui_style_plugin_table' => array(
+    'views_ui_style_plugin_table' => [
       'render element' => 'form',
       'file' => 'views_ui.theme.inc',
-    ),
+    ],
 
     // When previewing a view.
-    'views_ui_view_preview_section' => array(
-      'variables' => array('view' => NULL, 'section' => NULL, 'content' => NULL, 'links' => ''),
+    'views_ui_view_preview_section' => [
+      'variables' => ['view' => NULL, 'section' => NULL, 'content' => NULL, 'links' => ''],
       'file' => 'views_ui.theme.inc',
-    ),
+    ],
 
     // Generic container wrapper, to use instead of theme_container when an id
     // is not desired.
-    'views_ui_container' => array(
-      'variables' => array('children' => NULL, 'attributes' => array()),
+    'views_ui_container' => [
+      'variables' => ['children' => NULL, 'attributes' => []],
       'file' => 'views_ui.theme.inc',
-    ),
-  );
+    ],
+  ];
 }
 
 /**
@@ -141,16 +141,16 @@ function views_ui_preprocess_views_view(&$variables) {
 
   if (!empty($view->live_preview) && \Drupal::moduleHandler()->moduleExists('contextual')) {
     $view->setShowAdminLinks(FALSE);
-    foreach (array('title', 'header', 'exposed', 'rows', 'pager', 'more', 'footer', 'empty', 'attachment_after', 'attachment_before') as $section) {
+    foreach (['title', 'header', 'exposed', 'rows', 'pager', 'more', 'footer', 'empty', 'attachment_after', 'attachment_before'] as $section) {
       if (!empty($variables[$section])) {
-        $variables[$section] = array(
+        $variables[$section] = [
           '#theme' => 'views_ui_view_preview_section',
           '#view' => $view,
           '#section' => $section,
           '#content' => $variables[$section],
-          '#theme_wrappers' => array('views_ui_container'),
-          '#attributes' => array('class' => array('contextual-region')),
-        );
+          '#theme_wrappers' => ['views_ui_container'],
+          '#attributes' => ['class' => ['contextual-region']],
+        ];
       }
     }
   }
@@ -169,28 +169,28 @@ function views_ui_preprocess_views_view(&$variables) {
 function views_ui_view_preview_section_handler_links(ViewExecutable $view, $type, $title = FALSE) {
   $display = $view->display_handler->display;
   $handlers = $view->display_handler->getHandlers($type);
-  $links = array();
+  $links = [];
 
   $types = ViewExecutable::getHandlerTypes();
   if ($title) {
-    $links[$type . '-title'] = array(
+    $links[$type . '-title'] = [
       'title' => $types[$type]['title'],
-    );
+    ];
   }
 
   foreach ($handlers as $id => $handler) {
     $field_name = $handler->adminLabel(TRUE);
-    $links[$type . '-edit-' . $id] = array(
-      'title' => t('Edit @section', array('@section' => $field_name)),
+    $links[$type . '-edit-' . $id] = [
+      'title' => t('Edit @section', ['@section' => $field_name]),
       'url' => Url::fromRoute('views_ui.form_handler', ['js' => 'nojs', 'view' => $view->storage->id(), 'display_id' => $display['id'], 'type' => $type, 'id' => $id]),
-      'attributes' => array('class' => array('views-ajax-link')),
-    );
+      'attributes' => ['class' => ['views-ajax-link']],
+    ];
   }
-  $links[$type . '-add'] = array(
+  $links[$type . '-add'] = [
     'title' => t('Add new'),
     'url' => Url::fromRoute('views_ui.form_add_handler', ['js' => 'nojs', 'view' => $view->storage->id(), 'display_id' => $display['id'], 'type' => $type]),
-    'attributes' => array('class' => array('views-ajax-link')),
-  );
+    'attributes' => ['class' => ['views-ajax-link']],
+  ];
 
   return $links;
 }
@@ -200,13 +200,13 @@ function views_ui_view_preview_section_handler_links(ViewExecutable $view, $type
  */
 function views_ui_view_preview_section_display_category_links(ViewExecutable $view, $type, $title) {
   $display = $view->display_handler->display;
-  $links = array(
-    $type . '-edit' => array(
-      'title' => t('Edit @section', array('@section' => $title)),
+  $links = [
+    $type . '-edit' => [
+      'title' => t('Edit @section', ['@section' => $title]),
       'url' => Url::fromRoute('views_ui.form_display', ['js' => 'nojs', 'view' => $view->storage->id(), 'display_id' => $display['id'], 'type' => $type]),
-      'attributes' => array('class' => array('views-ajax-link')),
-    ),
-  );
+      'attributes' => ['class' => ['views-ajax-link']],
+    ],
+  ];
 
   return $links;
 }
@@ -215,7 +215,7 @@ function views_ui_view_preview_section_display_category_links(ViewExecutable $vi
  * Returns all contextual links for the main content part of the view.
  */
 function views_ui_view_preview_section_rows_links(ViewExecutable $view) {
-  $links = array();
+  $links = [];
   $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'filter', TRUE));
   $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'field', TRUE));
   $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'sort', TRUE));
@@ -233,10 +233,10 @@ function views_ui_views_plugins_display_alter(&$plugins) {
   // paths underneath "admin/structure/views/view/{$view->id()}" (i.e., paths
   // for editing and performing other contextual actions on the view).
   foreach ($plugins as &$display) {
-    $display['contextual links']['entity.view.edit_form'] = array(
+    $display['contextual links']['entity.view.edit_form'] = [
       'route_name' => 'entity.view.edit_form',
-      'route_parameters_names' => array('view' => 'id'),
-    );
+      'route_parameters_names' => ['view' => 'id'],
+    ];
   }
 }
 
@@ -247,7 +247,7 @@ function views_ui_contextual_links_view_alter(&$element, $items) {
   // Remove contextual links from being rendered, when so desired, such as
   // within a View preview.
   if (views_ui_contextual_links_suppress()) {
-    $element['#links'] = array();
+    $element['#links'] = [];
   }
   // Append the display ID to the Views UI edit links, so that clicking on the
   // contextual link takes you directly to the correct display tab on the edit
@@ -305,7 +305,7 @@ function views_ui_contextual_links_suppress_pop() {
  * node.views.inc as well.
  */
 function views_ui_views_analyze(ViewExecutable $view) {
-  $ret = array();
+  $ret = [];
   // Check for something other than the default display:
   if (count($view->displayHandlers) < 2) {
     $ret[] = Analyzer::formatMessage(t('This view has only a default display and therefore will not be placed anywhere on your site; perhaps you want to add a page or a block display.'), 'warning');
@@ -320,7 +320,7 @@ function views_ui_views_analyze(ViewExecutable $view) {
     if ($display->hasPath() && $path = $display->getOption('path')) {
       $normal_path = \Drupal::service('path.alias_manager')->getPathByAlias($path);
       if ($path != $normal_path) {
-        $ret[] = Analyzer::formatMessage(t('You have configured display %display with a path which is an path alias as well. This might lead to unwanted effects so better use an internal path.', array('%display' => $display->display['display_title'])), 'warning');
+        $ret[] = Analyzer::formatMessage(t('You have configured display %display with a path which is an path alias as well. This might lead to unwanted effects so better use an internal path.', ['%display' => $display->display['display_title']]), 'warning');
       }
     }
   }
diff --git a/core/modules/views_ui/views_ui.theme.inc b/core/modules/views_ui/views_ui.theme.inc
index 926f82ab309d439ff5e953d122c74a9a028dbf41..e6ef8756ff7dede7b7383dfbfec3acfdc0c8122b 100644
--- a/core/modules/views_ui/views_ui.theme.inc
+++ b/core/modules/views_ui/views_ui.theme.inc
@@ -89,7 +89,7 @@ function template_preprocess_views_ui_display_tab_bucket(&$variables) {
   $variables['overridden'] = isset($element['#overridden']) ? $element['#overridden'] : NULL;
   $variables['content'] = $element['#children'];
   $variables['title'] = $element['#title'];
-  $variables['actions'] = !empty($element['#actions']) ? $element['#actions'] : array();
+  $variables['actions'] = !empty($element['#actions']) ? $element['#actions'] : [];
 }
 
 /**
@@ -105,14 +105,14 @@ function template_preprocess_views_ui_build_group_filter_form(&$variables) {
   $form = $variables['form'];
 
   // Prepare table of options.
-  $header = array(
+  $header = [
     t('Default'),
     t('Weight'),
     t('Label'),
     t('Operator'),
     t('Value'),
     t('Operations'),
-  );
+  ];
 
   // Prepare default selectors.
   $form_state = new FormState();
@@ -120,15 +120,15 @@ function template_preprocess_views_ui_build_group_filter_form(&$variables) {
   $form['default_group_multiple'] = Checkboxes::processCheckboxes($form['default_group_multiple'], $form_state, $form);
   $form['default_group']['All']['#title'] = '';
 
-  $rows[] = array(
+  $rows[] = [
     ['data' => $form['default_group']['All']],
     '',
-    array(
+    [
       'data' => \Drupal::config('views.settings')->get('ui.exposed_filter_any_label') == 'old_any' ? t('&lt;Any&gt;') : t('- Any -'),
       'colspan' => 4,
-      'class' => array('class' => 'any-default-radios-row'),
-    ),
-  );
+      'class' => ['class' => 'any-default-radios-row'],
+    ],
+  ];
   // Remove the 'All' default_group form element because it's added to the
   // table row.
   unset($variables['form']['default_group']['All']);
@@ -161,32 +161,32 @@ function template_preprocess_views_ui_build_group_filter_form(&$variables) {
       '#title' => SafeMarkup::format('<span>@text</span>', ['@text' => t('Remove')]),
     ];
     $remove = [$form['group_items'][$group_id]['remove'], $link];
-    $data = array(
+    $data = [
       'default' => ['data' => $default],
       'weight' => ['data' => $form['group_items'][$group_id]['weight']],
       'title' => ['data' => $form['group_items'][$group_id]['title']],
       'operator' => ['data' => $form['group_items'][$group_id]['operator']],
       'value' => ['data' => $form['group_items'][$group_id]['value']],
       'remove' => ['data' => $remove],
-    );
-    $rows[] = array('data' => $data, 'id' => 'views-row-' . $group_id, 'class' => array('draggable'));
+    ];
+    $rows[] = ['data' => $data, 'id' => 'views-row-' . $group_id, 'class' => ['draggable']];
   }
-  $variables['table'] = array(
+  $variables['table'] = [
     '#type' => 'table',
     '#header' => $header,
     '#rows' => $rows,
-    '#attributes' => array(
-      'class' => array('views-filter-groups'),
+    '#attributes' => [
+      'class' => ['views-filter-groups'],
       'id' => 'views-filter-groups',
-    ),
-    '#tabledrag' => array(
-      array(
+    ],
+    '#tabledrag' => [
+      [
         'action' => 'order',
         'relationship' => 'sibling',
         'group' => 'weight',
-      )
-    ),
-  );
+      ]
+    ],
+  ];
 
   // Hide fields used in table.
   unset($variables['form']['group_items']);
@@ -203,7 +203,7 @@ function template_preprocess_views_ui_build_group_filter_form(&$variables) {
  */
 function template_preprocess_views_ui_rearrange_filter_form(&$variables) {
   $form = &$variables['form'];
-  $rows = $ungroupable_rows = array();
+  $rows = $ungroupable_rows = [];
   // Enable grouping only if > 1 group.
   $variables['grouping'] = count(array_keys($form['#group_options'])) > 1;
 
@@ -212,41 +212,41 @@ function template_preprocess_views_ui_rearrange_filter_form(&$variables) {
     if ($group_id !== 'ungroupable') {
       // Set up tabledrag so that it changes the group dropdown when rows are
       // dragged between groups.
-      $options = array(
+      $options = [
         'table_id' => 'views-rearrange-filters',
         'action' => 'match',
         'relationship' => 'sibling',
         'group' => 'views-group-select',
         'subgroup' => 'views-group-select-' . $group_id,
-      );
+      ];
       drupal_attach_tabledrag($form['override'], $options);
 
       // Title row, spanning all columns.
-      $row = array();
+      $row = [];
       // Add a cell to the first row, containing the group operator.
-      $row[] = array(
-        'class' => array('group', 'group-operator', 'container-inline'),
+      $row[] = [
+        'class' => ['group', 'group-operator', 'container-inline'],
         'data' => $form['filter_groups']['groups'][$group_id],
-        'rowspan' => max(array(2, count($contents) + 1)),
-      );
+        'rowspan' => max([2, count($contents) + 1]),
+      ];
       // Title.
-      $row[] = array(
-        'class' => array('group', 'group-title'),
-        'data' => array(
+      $row[] = [
+        'class' => ['group', 'group-title'],
+        'data' => [
           '#prefix' => '<span>',
           '#markup' => $form['#group_options'][$group_id],
           '#suffix' => '</span>',
-        ),
+        ],
         'colspan' => 4,
-      );
-      $rows[] = array(
-        'class' => array('views-group-title'),
+      ];
+      $rows[] = [
+        'class' => ['views-group-title'],
         'data' => $row,
         'id' => 'views-group-title-' . $group_id,
-      );
+      ];
 
       // Row which will only appear if the group has nothing in it.
-      $row = array();
+      $row = [];
       $class = 'group-' . (count($contents) ? 'populated' : 'empty');
       $instructions = '<span>' . t('No filters have been added.') . '</span> <span class="js-only">' . t('Drag to add filters.') . '</span>';
       // When JavaScript is enabled, the button for removing the group (if it's
@@ -255,63 +255,63 @@ function template_preprocess_views_ui_rearrange_filter_form(&$variables) {
       if (!empty($form['remove_groups'][$group_id]['#type']) && $form['remove_groups'][$group_id]['#type'] == 'submit') {
         $form['remove_groups'][$group_id]['#attributes']['class'][] = 'js-hide';
       }
-      $row[] = array(
+      $row[] = [
         'colspan' => 5,
-        'data' => array(
-          array('#markup' => $instructions),
+        'data' => [
+          ['#markup' => $instructions],
           $form['remove_groups'][$group_id],
-        ),
-      );
-      $rows[] = array(
-        'class' => array(
+        ],
+      ];
+      $rows[] = [
+        'class' => [
           'group-message',
           'group-' . $group_id . '-message',
           $class,
-        ),
+        ],
         'data' => $row,
         'id' => 'views-group-' . $group_id,
-      );
+      ];
     }
 
     foreach ($contents as $id) {
       if (isset($form['filters'][$id]['name'])) {
-        $row = array();
+        $row = [];
         $row[]['data'] = $form['filters'][$id]['name'];
-        $form['filters'][$id]['weight']['#attributes']['class'] = array('weight');
+        $form['filters'][$id]['weight']['#attributes']['class'] = ['weight'];
         $row[]['data'] = $form['filters'][$id]['weight'];
-        $form['filters'][$id]['group']['#attributes']['class'] = array('views-group-select views-group-select-' . $group_id);
+        $form['filters'][$id]['group']['#attributes']['class'] = ['views-group-select views-group-select-' . $group_id];
         $row[]['data'] = $form['filters'][$id]['group'];
         $form['filters'][$id]['removed']['#attributes']['class'][] = 'js-hide';
 
-        $remove_link = array(
+        $remove_link = [
           '#type' => 'link',
           '#url' => Url::fromRoute('<none>'),
-          '#title' => SafeMarkup::format('<span>@text</span>', array('@text' => t('Remove'))),
+          '#title' => SafeMarkup::format('<span>@text</span>', ['@text' => t('Remove')]),
           '#weight' => '1',
-          '#options' => array(
-            'attributes' => array(
+          '#options' => [
+            'attributes' => [
               'id' => 'views-remove-link-' . $id,
-              'class' => array(
+              'class' => [
                 'views-hidden',
                 'views-button-remove',
                 'views-groups-remove-link',
                 'views-remove-link',
-              ),
+              ],
               'alt' => t('Remove this item'),
               'title' => t('Remove this item'),
-            ),
-          ),
-        );
-        $row[]['data'] = array(
+            ],
+          ],
+        ];
+        $row[]['data'] = [
           $form['filters'][$id]['removed'],
           $remove_link,
-        );
+        ];
 
-        $row = array(
+        $row = [
           'data' => $row,
-          'class' => array('draggable'),
+          'class' => ['draggable'],
           'id' => 'views-row-' . $id,
-        );
+        ];
 
         if ($group_id !== 'ungroupable') {
           $rows[] = $row;
@@ -328,56 +328,56 @@ function template_preprocess_views_ui_rearrange_filter_form(&$variables) {
   }
 
   if (!empty($ungroupable_rows)) {
-    $header = array(
+    $header = [
       t('Ungroupable filters'),
       t('Weight'),
-      array(
+      [
         'data' => t('Group'),
-        'class' => array('views-hide-label'),
-      ),
-      array(
+        'class' => ['views-hide-label'],
+      ],
+      [
         'data' => t('Remove'),
-        'class' => array('views-hide-label'),
-      ),
-    );
-    $variables['ungroupable_table'] = array(
+        'class' => ['views-hide-label'],
+      ],
+    ];
+    $variables['ungroupable_table'] = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $ungroupable_rows,
-      '#attributes' => array(
+      '#attributes' => [
         'id' => 'views-rearrange-filters-ungroupable',
-        'class' => array('arrange'),
-      ),
-      '#tabledrag' => array(
-        array(
+        'class' => ['arrange'],
+      ],
+      '#tabledrag' => [
+        [
           'action' => 'order',
           'relationship' => 'sibling',
           'group' => 'weight',
-        )
-      ),
-    );
+        ]
+      ],
+    ];
   }
 
   if (empty($rows)) {
-    $rows[] = array(array('data' => t('No fields available.'), 'colspan' => '2'));
+    $rows[] = [['data' => t('No fields available.'), 'colspan' => '2']];
   }
 
   // Set up tabledrag so that the weights are changed when rows are dragged.
-  $variables['table'] = array(
+  $variables['table'] = [
     '#type' => 'table',
     '#rows' => $rows,
-    '#attributes' => array(
+    '#attributes' => [
       'id' => 'views-rearrange-filters',
-      'class' => array('arrange'),
-    ),
-    '#tabledrag' => array(
-      array(
+      'class' => ['arrange'],
+    ],
+    '#tabledrag' => [
+      [
         'action' => 'order',
         'relationship' => 'sibling',
         'group' => 'weight',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
   // When JavaScript is enabled, the button for adding a new group should be
   // hidden, since it will be replaced by a link on the client side.
@@ -397,72 +397,72 @@ function template_preprocess_views_ui_rearrange_filter_form(&$variables) {
 function template_preprocess_views_ui_style_plugin_table(&$variables) {
   $form = $variables['form'];
 
-  $header = array(
+  $header = [
     t('Field'),
     t('Column'),
     t('Align'),
     t('Separator'),
-    array(
+    [
       'data' => t('Sortable'),
       'align' => 'center',
-    ),
-    array(
+    ],
+    [
       'data' => t('Default order'),
       'align' => 'center',
-    ),
-    array(
+    ],
+    [
       'data' => t('Default sort'),
       'align' => 'center',
-    ),
-    array(
+    ],
+    [
       'data' => t('Hide empty column'),
       'align' => 'center',
-    ),
-    array(
+    ],
+    [
       'data' => t('Responsive'),
       'align' => 'center',
-    ),
-  );
-  $rows = array();
+    ],
+  ];
+  $rows = [];
   foreach (Element::children($form['columns']) as $id) {
-    $row = array();
+    $row = [];
     $row[]['data'] = $form['info'][$id]['name'];
     $row[]['data'] = $form['columns'][$id];
     $row[]['data'] = $form['info'][$id]['align'];
     $row[]['data'] = $form['info'][$id]['separator'];
 
     if (!empty($form['info'][$id]['sortable'])) {
-      $row[] = array(
+      $row[] = [
         'data' => $form['info'][$id]['sortable'],
         'align' => 'center',
-      );
-      $row[] = array(
+      ];
+      $row[] = [
         'data' => $form['info'][$id]['default_sort_order'],
         'align' => 'center',
-      );
-      $row[] = array(
+      ];
+      $row[] = [
         'data' => $form['default'][$id],
         'align' => 'center',
-      );
+      ];
     }
     else {
       $row[] = '';
       $row[] = '';
       $row[] = '';
     }
-    $row[] = array(
+    $row[] = [
       'data' => $form['info'][$id]['empty_column'],
       'align' => 'center',
-    );
-    $row[] = array(
+    ];
+    $row[] = [
       'data' => $form['info'][$id]['responsive'],
       'align' => 'center',
-    );
+    ];
     $rows[] = $row;
   }
 
   // Add the special 'None' row.
-  $rows[] = array(array('data' => t('None'), 'colspan' => 6), array('align' => 'center', 'data' => $form['default'][-1]), array('colspan' => 2));
+  $rows[] = [['data' => t('None'), 'colspan' => 6], ['align' => 'center', 'data' => $form['default'][-1]], ['colspan' => 2]];
 
   // Unset elements from the form array that are used to build the table so that
   // they are not rendered twice.
@@ -470,12 +470,12 @@ function template_preprocess_views_ui_style_plugin_table(&$variables) {
   unset($form['info']);
   unset($form['columns']);
 
-  $variables['table'] = array(
+  $variables['table'] = [
     '#type' => 'table',
     '#theme' => 'table__views_ui_style_plugin_table',
     '#header' => $header,
     '#rows' => $rows,
-  );
+  ];
   $variables['form'] = $form;
 }
 
@@ -536,14 +536,14 @@ function template_preprocess_views_ui_view_preview_section(&$variables) {
   }
 
   if (isset($links)) {
-    $build = array(
+    $build = [
       '#theme' => 'links__contextual',
       '#links' => $links,
-      '#attributes' => array('class' => array('contextual-links')),
-      '#attached' => array(
-        'library' => array('contextual/drupal.contextual-links'),
-      ),
-    );
+      '#attributes' => ['class' => ['contextual-links']],
+      '#attached' => [
+        'library' => ['contextual/drupal.contextual-links'],
+      ],
+    ];
     $variables['links'] = $build;
   }
 }
@@ -552,5 +552,5 @@ function template_preprocess_views_ui_view_preview_section(&$variables) {
  * Implements hook_theme_suggestions_HOOK().
  */
 function views_ui_theme_suggestions_views_ui_view_preview_section(array $variables) {
-  return array('views_ui_view_preview_section__' . $variables['section']);
+  return ['views_ui_view_preview_section__' . $variables['section']];
 }
diff --git a/core/phpcs.xml.dist b/core/phpcs.xml.dist
index 9ad822f3903f92703329be435d936176ac12a557..e4e42bea220c196ce13ec25a5f5c066a87f8776d 100644
--- a/core/phpcs.xml.dist
+++ b/core/phpcs.xml.dist
@@ -101,6 +101,7 @@
   <rule ref="Generic.PHP.DisallowShortOpenTag"/>
   <rule ref="Generic.PHP.UpperCaseConstant"/>
   <rule ref="Generic.WhiteSpace.DisallowTabIndent"/>
+  <rule ref="Generic.Arrays.DisallowLongArraySyntax" />
 
   <!-- PSR-2 sniffs -->
   <rule ref="PSR2.Classes.PropertyDeclaration">
diff --git a/core/profiles/minimal/src/Tests/MinimalTest.php b/core/profiles/minimal/src/Tests/MinimalTest.php
index 056565e710ef369a29cac64c2ded536c742a3a54..7a505cd0a23b2b62aef8624bdc0a8a32f52999e6 100644
--- a/core/profiles/minimal/src/Tests/MinimalTest.php
+++ b/core/profiles/minimal/src/Tests/MinimalTest.php
@@ -24,7 +24,7 @@ function testMinimal() {
 
     // Create a user to test tools and navigation blocks for logged in users
     // with appropriate permissions.
-    $user = $this->drupalCreateUser(array('access administration pages', 'administer content types'));
+    $user = $this->drupalCreateUser(['access administration pages', 'administer content types']);
     $this->drupalLogin($user);
     $this->drupalGet('');
     $this->assertText(t('Tools'));
diff --git a/core/profiles/standard/standard.install b/core/profiles/standard/standard.install
index 0a40ce6cddcb2bbf310421c6f5e0bf8acaa6472a..2f567abb495c227334fdd768e40c4426b19c8170 100644
--- a/core/profiles/standard/standard.install
+++ b/core/profiles/standard/standard.install
@@ -25,8 +25,8 @@ function standard_install() {
   $user_settings->set('register', USER_REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL)->save(TRUE);
 
   // Enable default permissions for system roles.
-  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access comments'));
-  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('access comments', 'post comments', 'skip comment approval'));
+  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access comments']);
+  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, ['access comments', 'post comments', 'skip comment approval']);
 
   // Assign user 1 the "administrator" role.
   $user = User::load(1);
@@ -40,34 +40,34 @@ function standard_install() {
   // Enable the Contact link in the footer menu.
   /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
   $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
-  $menu_link_manager->updateDefinition('contact.site_page', array('enabled' => TRUE));
+  $menu_link_manager->updateDefinition('contact.site_page', ['enabled' => TRUE]);
 
-  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access site-wide contact form'));
-  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('access site-wide contact form'));
+  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['access site-wide contact form']);
+  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, ['access site-wide contact form']);
 
   // Allow authenticated users to use shortcuts.
-  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('access shortcuts'));
+  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, ['access shortcuts']);
 
   // Populate the default shortcut set.
-  $shortcut = Shortcut::create(array(
+  $shortcut = Shortcut::create([
     'shortcut_set' => 'default',
     'title' => t('Add content'),
     'weight' => -20,
-    'link' => array('uri' => 'internal:/node/add'),
-  ));
+    'link' => ['uri' => 'internal:/node/add'],
+  ]);
   $shortcut->save();
 
-  $shortcut = Shortcut::create(array(
+  $shortcut = Shortcut::create([
     'shortcut_set' => 'default',
     'title' => t('All content'),
     'weight' => -19,
-    'link' => array('uri' => 'internal:/admin/content'),
-  ));
+    'link' => ['uri' => 'internal:/admin/content'],
+  ]);
   $shortcut->save();
 
   // Allow all users to use search.
-  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('search content'));
-  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('search content'));
+  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['search content']);
+  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, ['search content']);
 
   // Enable the admin theme.
   \Drupal::configFactory()->getEditable('node.settings')->set('use_admin_theme', TRUE)->save(TRUE);
diff --git a/core/profiles/standard/tests/src/Functional/StandardTest.php b/core/profiles/standard/tests/src/Functional/StandardTest.php
index 64163681a3c2e2941939caaccd9b5737fcba0b34..9baae37c82a818c864fb673f6a02d13f95f21100 100644
--- a/core/profiles/standard/tests/src/Functional/StandardTest.php
+++ b/core/profiles/standard/tests/src/Functional/StandardTest.php
@@ -38,20 +38,20 @@ function testStandard() {
     $this->assertResponse(200);
 
     // Test anonymous user can access 'Main navigation' block.
-    $this->adminUser = $this->drupalCreateUser(array(
+    $this->adminUser = $this->drupalCreateUser([
       'administer blocks',
       'post comments',
       'skip comment approval',
       'create article content',
       'create page content',
-    ));
+    ]);
     $this->drupalLogin($this->adminUser);
     // Configure the block.
     $this->drupalGet('admin/structure/block/add/system_menu_block:main/bartik');
-    $this->drupalPostForm(NULL, array(
+    $this->drupalPostForm(NULL, [
       'region' => 'sidebar_first',
       'id' => 'main_navigation',
-    ), t('Save block'));
+    ], t('Save block'));
     // Verify admin user can see the block.
     $this->drupalGet('');
     $this->assertText('Main navigation');
@@ -59,18 +59,18 @@ function testStandard() {
     // Verify we have role = aria on system_powered_by and help_block
     // blocks.
     $this->drupalGet('admin/structure/block');
-    $elements = $this->xpath('//div[@role=:role and @id=:id]', array(
+    $elements = $this->xpath('//div[@role=:role and @id=:id]', [
       ':role' => 'complementary',
       ':id' => 'block-bartik-help',
-    ));
+    ]);
 
     $this->assertEqual(count($elements), 1, 'Found complementary role on help block.');
 
     $this->drupalGet('');
-    $elements = $this->xpath('//div[@role=:role and @id=:id]', array(
+    $elements = $this->xpath('//div[@role=:role and @id=:id]', [
       ':role' => 'complementary',
       ':id' => 'block-bartik-powered',
-    ));
+    ]);
     $this->assertEqual(count($elements), 1, 'Found complementary role on powered by block.');
 
     // Verify anonymous user can see the block.
@@ -79,22 +79,22 @@ function testStandard() {
 
     // Ensure comments don't show in the front page RSS feed.
     // Create an article.
-    $this->drupalCreateNode(array(
+    $this->drupalCreateNode([
       'type' => 'article',
       'title' => 'Foobar',
       'promote' => 1,
       'status' => 1,
-      'body' => array(array('value' => 'Then she picked out two somebodies,<br />Sally and me', 'format' => 'basic_html')),
-    ));
+      'body' => [['value' => 'Then she picked out two somebodies,<br />Sally and me', 'format' => 'basic_html']],
+    ]);
 
     // Add a comment.
     $this->drupalLogin($this->adminUser);
     $this->drupalGet('node/1');
     $this->assertRaw('Then she picked out two somebodies,<br />Sally and me', 'Found a line break.');
-    $this->drupalPostForm(NULL, array(
+    $this->drupalPostForm(NULL, [
       'subject[0][value]' => 'Barfoo',
       'comment_body[0][value]' => 'Then she picked out two somebodies, Sally and me',
-    ), t('Save'));
+    ], t('Save'));
     // Fetch the feed.
     $this->drupalGet('rss.xml');
     $this->assertText('Foobar');
@@ -131,9 +131,9 @@ function testStandard() {
       $filter->removeFilter('editor_file_reference');
       $filter->save();
     }
-    \Drupal::service('module_installer')->uninstall(array('editor', 'ckeditor'));
+    \Drupal::service('module_installer')->uninstall(['editor', 'ckeditor']);
     $this->rebuildContainer();
-    \Drupal::service('module_installer')->install(array('editor'));
+    \Drupal::service('module_installer')->install(['editor']);
     /** @var \Drupal\contact\ContactFormInterface $contact_form */
     $contact_form = ContactForm::load('feedback');
     $recipients = $contact_form->getRecipients();
@@ -167,7 +167,7 @@ function testStandard() {
 
     // Make sure the optional image styles are installed after enabling
     // the responsive_image module.
-    \Drupal::service('module_installer')->install(array('responsive_image'));
+    \Drupal::service('module_installer')->install(['responsive_image']);
     $this->rebuildContainer();
     $this->drupalGet('admin/config/media/image-styles');
     $this->assertText('Max 325x325');
diff --git a/core/profiles/testing/modules/drupal_system_listing_compatible_test/src/Tests/SystemListingCompatibleTest.php b/core/profiles/testing/modules/drupal_system_listing_compatible_test/src/Tests/SystemListingCompatibleTest.php
index 332b00081486a72d278df9f90eb631075018ee26..ac2087be77abbf6fa54445273e6b0d4476a35b28 100644
--- a/core/profiles/testing/modules/drupal_system_listing_compatible_test/src/Tests/SystemListingCompatibleTest.php
+++ b/core/profiles/testing/modules/drupal_system_listing_compatible_test/src/Tests/SystemListingCompatibleTest.php
@@ -20,7 +20,7 @@ class SystemListingCompatibleTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('drupal_system_listing_compatible_test');
+  public static $modules = ['drupal_system_listing_compatible_test'];
 
   /**
    * Use the Minimal profile.
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/Core/MachineNameTest.php b/core/tests/Drupal/FunctionalJavascriptTests/Core/MachineNameTest.php
index 10aa88e921596022f19d18caef6eeb0db5de723f..bf2643da6a536a3855d90d89635326489e8840a2 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/Core/MachineNameTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/Core/MachineNameTest.php
@@ -27,9 +27,9 @@ class MachineNameTest extends JavascriptTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $account = $this->drupalCreateUser(array(
+    $account = $this->drupalCreateUser([
       'access content',
-    ));
+    ]);
     $this->drupalLogin($account);
   }
 
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/EntityReference/EntityReferenceAutocompleteWidgetTest.php b/core/tests/Drupal/FunctionalJavascriptTests/EntityReference/EntityReferenceAutocompleteWidgetTest.php
index a116c6fde8d060517cc8b532c89afd5bbee6790f..511dee6e32a467714cfaed3bdc5a621ce0b4d4cf 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/EntityReference/EntityReferenceAutocompleteWidgetTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/EntityReference/EntityReferenceAutocompleteWidgetTest.php
@@ -52,9 +52,9 @@ public function testEntityReferenceAutocompleteWidget() {
     entity_get_form_display('node', 'page', 'default')
       ->setComponent($field_name, [
         'type' => 'entity_reference_autocomplete',
-        'settings' => array(
+        'settings' => [
           'match_operator' => 'CONTAINS',
-        ),
+        ],
       ])
       ->save();
 
@@ -78,9 +78,9 @@ public function testEntityReferenceAutocompleteWidget() {
     entity_get_form_display('node', 'page', 'default')
       ->setComponent($field_name, [
         'type' => 'entity_reference_autocomplete',
-        'settings' => array(
+        'settings' => [
           'match_operator' => 'STARTS_WITH',
-        ),
+        ],
       ])
       ->save();
 
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
index 815a26b54e2071490a2e3c9d48aa53b7b9221657..81d379f915bf82e5182a7e7b73d9f5f2108f38ec 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
@@ -113,7 +113,7 @@ public function waitForElementVisible($selector, $locator, $timeout = 10000) {
    *   The page element node if found, NULL if not.
    */
   public function waitForButton($locator, $timeout = 10000) {
-    return $this->waitForElement('named', array('button', $locator), $timeout);
+    return $this->waitForElement('named', ['button', $locator], $timeout);
   }
 
   /**
@@ -128,7 +128,7 @@ public function waitForButton($locator, $timeout = 10000) {
    *   The page element node if found, NULL if not.
    */
   public function waitForLink($locator, $timeout = 10000) {
-    return $this->waitForElement('named', array('link', $locator), $timeout);
+    return $this->waitForElement('named', ['link', $locator], $timeout);
   }
 
   /**
@@ -143,7 +143,7 @@ public function waitForLink($locator, $timeout = 10000) {
    *   The page element node if found, NULL if not.
    */
   public function waitForField($locator, $timeout = 10000) {
-    return $this->waitForElement('named', array('field', $locator), $timeout);
+    return $this->waitForElement('named', ['field', $locator], $timeout);
   }
 
   /**
@@ -158,7 +158,7 @@ public function waitForField($locator, $timeout = 10000) {
    *   The page element node if found, NULL if not.
    */
   public function waitForId($id, $timeout = 10000) {
-    return $this->waitForElement('named', array('id', $id), $timeout);
+    return $this->waitForElement('named', ['id', $id], $timeout);
   }
 
   /**
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/Tests/JSWebAssertTest.php b/core/tests/Drupal/FunctionalJavascriptTests/Tests/JSWebAssertTest.php
index 7930a909d9622efcd473fb6a87351ece69cbfbf6..36f6340f727948de61732d5f1e1d685cbff09555 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/Tests/JSWebAssertTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/Tests/JSWebAssertTest.php
@@ -80,7 +80,7 @@ public function testJsWebAssert() {
     $result = $page->findButton('Added WaitForElementVisible');
     $this->assertEmpty($result);
     $test_wait_on_element_visible->click();
-    $result = $assert_session->waitForElementVisible('named', array('button', 'Added WaitForElementVisible'));
+    $result = $assert_session->waitForElementVisible('named', ['button', 'Added WaitForElementVisible']);
     $this->assertNotEmpty($result);
     $this->assertTrue($result instanceof NodeElement);
     $this->assertEquals(TRUE, $result->isVisible());
diff --git a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
index 5e9caf4886e9c8f79b649e1af507b0c9287fb287..1cf46fce12815db9dde64ee2dea42665901258e1 100644
--- a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
+++ b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
@@ -711,7 +711,7 @@ abstract public function assertSession($name = NULL);
    * @deprecated Scheduled for removal in Drupal 9.0.0.
    *   Use $this->assertSession()->buildXPathQuery() instead.
    */
-  protected function buildXPathQuery($xpath, array $args = array()) {
+  protected function buildXPathQuery($xpath, array $args = []) {
     return $this->assertSession()->buildXPathQuery($xpath, $args);
   }
 
diff --git a/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php b/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
index 25d1c702eb43dfa4af6e42711f04cdc20a755986..b555fb66fc01806e93aa13cc5bca9694d84b39b6 100644
--- a/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
+++ b/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
@@ -21,7 +21,7 @@ class BrowserTestBaseTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = array('test_page_test', 'form_test', 'system_test');
+  public static $modules = ['test_page_test', 'form_test', 'system_test'];
 
   /**
    * Tests basic page test.
@@ -58,9 +58,9 @@ public function testGoTo() {
     $this->assertSession()->pageTextContains('Hello Drupal');
 
     // Test that setting headers with drupalGet() works.
-    $this->drupalGet('system-test/header', array(), array(
+    $this->drupalGet('system-test/header', [], [
       'Test-Header' => 'header value',
-    ));
+    ]);
     $returned_header = $this->getSession()->getResponseHeader('Test-Header');
     $this->assertSame('header value', $returned_header);
   }
diff --git a/core/tests/Drupal/FunctionalTests/Core/Config/SchemaConfigListenerTest.php b/core/tests/Drupal/FunctionalTests/Core/Config/SchemaConfigListenerTest.php
index 7138c5e80fc7c73b1cc553a770a283ec409b8bf2..698a7d1a0347c31430b8a3b362774f28ef576779 100644
--- a/core/tests/Drupal/FunctionalTests/Core/Config/SchemaConfigListenerTest.php
+++ b/core/tests/Drupal/FunctionalTests/Core/Config/SchemaConfigListenerTest.php
@@ -17,6 +17,6 @@ class SchemaConfigListenerTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
 }
diff --git a/core/tests/Drupal/FunctionalTests/Entity/ContentEntityFormCorrectUserInputMappingOnFieldDeltaElementsTest.php b/core/tests/Drupal/FunctionalTests/Entity/ContentEntityFormCorrectUserInputMappingOnFieldDeltaElementsTest.php
index c63170115af265a55241153d359fe1057ae1d23a..ba30da948ad100d0fcf4015f312ebac7334b45e8 100644
--- a/core/tests/Drupal/FunctionalTests/Entity/ContentEntityFormCorrectUserInputMappingOnFieldDeltaElementsTest.php
+++ b/core/tests/Drupal/FunctionalTests/Entity/ContentEntityFormCorrectUserInputMappingOnFieldDeltaElementsTest.php
@@ -84,10 +84,10 @@ public function testCorrectUserInputMappingOnComplexFields() {
     $this->drupalGet($this->entityTypeId . '/manage/' . $entity->id() . '/edit');
 
     // Rearrange the field items.
-    $edit = array(
+    $edit = [
       "$this->fieldName[0][_weight]" => 0,
       "$this->fieldName[1][_weight]" => -1,
-    );
+    ];
     // Executing an ajax call is important before saving as it will trigger
     // form state caching and so if for any reasons the form is rebuilt with
     // the entity built based on the user submitted values with already
diff --git a/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php b/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
index 72e7b6f8faf09b7c05cac8e8568207945e75a1a4..3e058028110d14f94d7f0e75ad834bde13a9d2ad 100644
--- a/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php
@@ -39,7 +39,7 @@ class AttachedAssetsTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('language', 'simpletest', 'common_test', 'system');
+  public static $modules = ['language', 'simpletest', 'common_test', 'system'];
 
   /**
    * {@inheritdoc}
@@ -57,10 +57,10 @@ protected function setUp() {
    */
   function testDefault() {
     $assets = new AttachedAssets();
-    $this->assertEqual(array(), $this->assetResolver->getCssAssets($assets, FALSE), 'Default CSS is empty.');
+    $this->assertEqual([], $this->assetResolver->getCssAssets($assets, FALSE), 'Default CSS is empty.');
     list($js_assets_header, $js_assets_footer) = $this->assetResolver->getJsAssets($assets, FALSE);
-    $this->assertEqual(array(), $js_assets_header, 'Default header JavaScript is empty.');
-    $this->assertEqual(array(), $js_assets_footer, 'Default footer JavaScript is empty.');
+    $this->assertEqual([], $js_assets_header, 'Default header JavaScript is empty.');
+    $this->assertEqual([], $js_assets_footer, 'Default footer JavaScript is empty.');
   }
 
   /**
@@ -187,7 +187,7 @@ function testAggregation() {
    * Tests JavaScript settings.
    */
   function testSettings() {
-    $build = array();
+    $build = [];
     $build['#attached']['library'][] = 'core/drupalSettings';
     // Nonsensical value to verify if it's possible to override path settings.
     $build['#attached']['drupalSettings']['path']['pathPrefix'] = 'yarhar';
@@ -311,12 +311,12 @@ function testRenderOrder() {
     $js = $this->assetResolver->getJsAssets($assets, FALSE)[1];
     $js_render_array = \Drupal::service('asset.js.collection_renderer')->render($js);
     $rendered_js = $this->renderer->renderPlain($js_render_array);
-    $matches = array();
+    $matches = [];
     if (preg_match_all('/weight_([-0-9]+_[0-9]+)/', $rendered_js, $matches)) {
       $result = $matches[1];
     }
     else {
-      $result = array();
+      $result = [];
     }
     $this->assertIdentical($result, $expected_order_js, 'JavaScript is added in the expected weight order.');
 
@@ -353,12 +353,12 @@ function testRenderOrder() {
     $css = $this->assetResolver->getCssAssets($assets, FALSE);
     $css_render_array = \Drupal::service('asset.css.collection_renderer')->render($css);
     $rendered_css = $this->renderer->renderPlain($css_render_array);
-    $matches = array();
+    $matches = [];
     if (preg_match_all('/([a-z]+)_weight_([-0-9]+_[0-9]+)/', $rendered_css, $matches)) {
       $result = $matches[0];
     }
     else {
-      $result = array();
+      $result = [];
     }
     $this->assertIdentical($result, $expected_order_css, 'CSS is added in the expected weight order.');
   }
diff --git a/core/tests/Drupal/KernelTests/Core/Bootstrap/GetFilenameTest.php b/core/tests/Drupal/KernelTests/Core/Bootstrap/GetFilenameTest.php
index e2108b3cc09cf6a812972fd5d9c5f7e50d9de9a7..9246eaa22edd866fb05499811e9c51c92ec171b4 100644
--- a/core/tests/Drupal/KernelTests/Core/Bootstrap/GetFilenameTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Bootstrap/GetFilenameTest.php
@@ -39,7 +39,7 @@ function testDrupalGetFilename() {
     $this->assertIdentical(drupal_get_filename('module', 'system'), 'core/modules/system/system.info.yml');
 
     // Retrieving the location of a theme.
-    \Drupal::service('theme_handler')->install(array('stark'));
+    \Drupal::service('theme_handler')->install(['stark']);
     $this->assertIdentical(drupal_get_filename('theme', 'stark'), 'core/themes/stark/stark.info.yml');
 
     // Retrieving the location of a theme engine.
diff --git a/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php b/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php
index 484ee9cc971e1d7c0a43b5c294eeaa434b7a4846..0fefc390f43cb71d9b436940d03ff127ea46beba 100644
--- a/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php
@@ -19,7 +19,7 @@ class DatabaseBackendTagTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * {@inheritdoc}
@@ -30,21 +30,21 @@ public function register(ContainerBuilder $container) {
     $container
       ->register('cache_factory', 'Drupal\Core\Cache\CacheFactory')
       ->addArgument(new Reference('settings'))
-      ->addMethodCall('setContainer', array(new Reference('service_container')));
+      ->addMethodCall('setContainer', [new Reference('service_container')]);
   }
 
   public function testTagInvalidations() {
     // Create cache entry in multiple bins.
-    $tags = array('test_tag:1', 'test_tag:2', 'test_tag:3');
-    $bins = array('data', 'bootstrap', 'render');
+    $tags = ['test_tag:1', 'test_tag:2', 'test_tag:3'];
+    $bins = ['data', 'bootstrap', 'render'];
     foreach ($bins as $bin) {
       $bin = \Drupal::cache($bin);
       $bin->set('test', 'value', Cache::PERMANENT, $tags);
       $this->assertTrue($bin->get('test'), 'Cache item was set in bin.');
     }
 
-    $invalidations_before = intval(db_select('cachetags')->fields('cachetags', array('invalidations'))->condition('tag', 'test_tag:2')->execute()->fetchField());
-    Cache::invalidateTags(array('test_tag:2'));
+    $invalidations_before = intval(db_select('cachetags')->fields('cachetags', ['invalidations'])->condition('tag', 'test_tag:2')->execute()->fetchField());
+    Cache::invalidateTags(['test_tag:2']);
 
     // Test that cache entry has been invalidated in multiple bins.
     foreach ($bins as $bin) {
@@ -53,7 +53,7 @@ public function testTagInvalidations() {
     }
 
     // Test that only one tag invalidation has occurred.
-    $invalidations_after = intval(db_select('cachetags')->fields('cachetags', array('invalidations'))->condition('tag', 'test_tag:2')->execute()->fetchField());
+    $invalidations_after = intval(db_select('cachetags')->fields('cachetags', ['invalidations'])->condition('tag', 'test_tag:2')->execute()->fetchField());
     $this->assertEqual($invalidations_after, $invalidations_before + 1, 'Only one addition cache tag invalidation has occurred after invalidating a tag used in multiple bins.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTest.php b/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTest.php
index fd1c942358331ed8f7f8bebd3494c08f5bd9485d..de8bbda55396e64edd326b18ccad3a40992fccfa 100644
--- a/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTest.php
@@ -16,7 +16,7 @@ class DatabaseBackendTest extends GenericCacheBackendUnitTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Creates a new instance of DatabaseBackend.
diff --git a/core/tests/Drupal/KernelTests/Core/Cache/GenericCacheBackendUnitTestBase.php b/core/tests/Drupal/KernelTests/Core/Cache/GenericCacheBackendUnitTestBase.php
index d5f3e9572996205990e0fbc43b7a6b94132c45cd..8179d7d5a1d1bc8e456664ba34c490945fe873d6 100644
--- a/core/tests/Drupal/KernelTests/Core/Cache/GenericCacheBackendUnitTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Cache/GenericCacheBackendUnitTestBase.php
@@ -102,7 +102,7 @@ protected function getCacheBackend($bin = NULL) {
   }
 
   protected function setUp() {
-    $this->cachebackends = array();
+    $this->cachebackends = [];
     $this->defaultValue = $this->randomMachineName(10);
 
     parent::setUp();
@@ -131,7 +131,7 @@ public function testSetGet() {
     $backend = $this->getCacheBackend();
 
     $this->assertIdentical(FALSE, $backend->get('test1'), "Backend does not contain data for cache id test1.");
-    $with_backslash = array('foo' => '\Drupal\foo\Bar');
+    $with_backslash = ['foo' => '\Drupal\foo\Bar'];
     $backend->set('test1', $with_backslash);
     $cached = $backend->get('test1');
     $this->assert(is_object($cached), "Backend returned an object for cache id test1.");
@@ -142,10 +142,10 @@ public function testSetGet() {
     $this->assertEqual($cached->expire, Cache::PERMANENT, 'Expire time is correct.');
 
     $this->assertIdentical(FALSE, $backend->get('test2'), "Backend does not contain data for cache id test2.");
-    $backend->set('test2', array('value' => 3), REQUEST_TIME + 3);
+    $backend->set('test2', ['value' => 3], REQUEST_TIME + 3);
     $cached = $backend->get('test2');
     $this->assert(is_object($cached), "Backend returned an object for cache id test2.");
-    $this->assertIdentical(array('value' => 3), $cached->data);
+    $this->assertIdentical(['value' => 3], $cached->data);
     $this->assertTrue($cached->valid, 'Item is marked as valid.');
     $this->assertTrue($cached->created >= REQUEST_TIME && $cached->created <= round(microtime(TRUE), 3), 'Created time is correct.');
     $this->assertEqual($cached->expire, REQUEST_TIME + 3, 'Expire time is correct.');
@@ -159,7 +159,7 @@ public function testSetGet() {
     $this->assertEqual($cached->expire, REQUEST_TIME - 3, 'Expire time is correct.');
 
     $this->assertIdentical(FALSE, $backend->get('test4'), "Backend does not contain data for cache id test4.");
-    $with_eof = array('foo' => "\nEOF\ndata");
+    $with_eof = ['foo' => "\nEOF\ndata"];
     $backend->set('test4', $with_eof);
     $cached = $backend->get('test4');
     $this->assert(is_object($cached), "Backend returned an object for cache id test4.");
@@ -169,7 +169,7 @@ public function testSetGet() {
     $this->assertEqual($cached->expire, Cache::PERMANENT, 'Expire time is correct.');
 
     $this->assertIdentical(FALSE, $backend->get('test5'), "Backend does not contain data for cache id test5.");
-    $with_eof_and_semicolon = array('foo' => "\nEOF;\ndata");
+    $with_eof_and_semicolon = ['foo' => "\nEOF;\ndata"];
     $backend->set('test5', $with_eof_and_semicolon);
     $cached = $backend->get('test5');
     $this->assert(is_object($cached), "Backend returned an object for cache id test5.");
@@ -178,7 +178,7 @@ public function testSetGet() {
     $this->assertTrue($cached->created >= REQUEST_TIME && $cached->created <= round(microtime(TRUE), 3), 'Created time is correct.');
     $this->assertEqual($cached->expire, Cache::PERMANENT, 'Expire time is correct.');
 
-    $with_variable = array('foo' => '$bar');
+    $with_variable = ['foo' => '$bar'];
     $backend->set('test6', $with_variable);
     $cached = $backend->get('test6');
     $this->assert(is_object($cached), "Backend returned an object for cache id test6.");
@@ -257,14 +257,14 @@ public function testDelete() {
   public function testValueTypeIsKept() {
     $backend = $this->getCacheBackend();
 
-    $variables = array(
+    $variables = [
       'test1' => 1,
       'test2' => '0',
       'test3' => '',
       'test4' => 12.64,
       'test5' => FALSE,
-      'test6' => array(1, 2, 3),
-    );
+      'test6' => [1, 2, 3],
+    ];
 
     // Create cache entries.
     foreach ($variables as $cid => $data) {
@@ -297,14 +297,14 @@ public function testGetMultiple() {
     $backend->set($long_cid, 300);
 
     // Mismatch order for harder testing.
-    $reference = array(
+    $reference = [
       'test3',
       'test7',
       'test21', // Cid does not exist.
       'test6',
       'test19', // Cid does not exist until added before second getMultiple().
       'test2',
-    );
+    ];
 
     $cids = $reference;
     $ret = $backend->getMultiple($cids);
@@ -364,7 +364,7 @@ public function testGetMultiple() {
     $this->assertFalse(in_array('test19', $cids), "Added cache id test19 is not in cids array.");
 
     // Test with a long $cid and non-numeric array key.
-    $cids = array('key:key' => $long_cid);
+    $cids = ['key:key' => $long_cid];
     $return = $backend->getMultiple($cids);
     $this->assertEqual(300, $return[$long_cid]->data);
     $this->assertTrue(empty($cids));
@@ -380,13 +380,13 @@ public function testSetMultiple() {
 
     // Set multiple testing keys.
     $backend->set('cid_1', 'Some other value');
-    $items = array(
-      'cid_1' => array('data' => 1),
-      'cid_2' => array('data' => 2),
-      'cid_3' => array('data' => array(1, 2)),
-      'cid_4' => array('data' => 1, 'expire' => $future_expiration),
-      'cid_5' => array('data' => 1, 'tags' => array('test:a', 'test:b')),
-    );
+    $items = [
+      'cid_1' => ['data' => 1],
+      'cid_2' => ['data' => 2],
+      'cid_3' => ['data' => [1, 2]],
+      'cid_4' => ['data' => 1, 'expire' => $future_expiration],
+      'cid_5' => ['data' => 1, 'tags' => ['test:a', 'test:b']],
+    ];
     $backend->setMultiple($items);
     $cids = array_keys($items);
     $cached = $backend->getMultiple($cids);
@@ -411,9 +411,9 @@ public function testSetMultiple() {
     // assertion.
     try {
       $items = [
-        'exception_test_1' => array('data' => 1, 'tags' => []),
-        'exception_test_2' => array('data' => 2, 'tags' => ['valid']),
-        'exception_test_3' => array('data' => 3, 'tags' => ['node' => [3, 5, 7]]),
+        'exception_test_1' => ['data' => 1, 'tags' => []],
+        'exception_test_2' => ['data' => 2, 'tags' => ['valid']],
+        'exception_test_3' => ['data' => 3, 'tags' => ['node' => [3, 5, 7]]],
       ];
       $backend->setMultiple($items);
       $this->fail('::setMultiple() was called with invalid cache tags, runtime assertion did not fail.');
@@ -441,13 +441,13 @@ public function testDeleteMultiple() {
 
     $backend->delete('test1');
     $backend->delete('test23'); // Nonexistent key should not cause an error.
-    $backend->deleteMultiple(array(
+    $backend->deleteMultiple([
       'test3',
       'test5',
       'test7',
       'test19', // Nonexistent key should not cause an error.
       'test21', // Nonexistent key should not cause an error.
-    ));
+    ]);
 
     // Test if expected keys have been deleted.
     $this->assertIdentical(FALSE, $backend->get('test1'), "Cache id test1 deleted.");
@@ -465,7 +465,7 @@ public function testDeleteMultiple() {
     $this->assertIdentical(FALSE, $backend->get('test21'), "Cache id test21 does not exist.");
 
     // Calling deleteMultiple() with an empty array should not cause an error.
-    $this->assertFalse($backend->deleteMultiple(array()));
+    $this->assertFalse($backend->deleteMultiple([]));
   }
 
   /**
@@ -498,14 +498,14 @@ function testInvalidate() {
     $backend->set('test3', 2);
     $backend->set('test4', 2);
 
-    $reference = array('test1', 'test2', 'test3', 'test4');
+    $reference = ['test1', 'test2', 'test3', 'test4'];
 
     $cids = $reference;
     $ret = $backend->getMultiple($cids);
     $this->assertEqual(count($ret), 4, 'Four items returned.');
 
     $backend->invalidate('test1');
-    $backend->invalidateMultiple(array('test2', 'test3'));
+    $backend->invalidateMultiple(['test2', 'test3']);
 
     $cids = $reference;
     $ret = $backend->getMultiple($cids);
@@ -517,7 +517,7 @@ function testInvalidate() {
 
     // Calling invalidateMultiple() with an empty array should not cause an
     // error.
-    $this->assertFalse($backend->invalidateMultiple(array()));
+    $this->assertFalse($backend->invalidateMultiple([]));
   }
 
   /**
@@ -527,45 +527,45 @@ function testInvalidateTags() {
     $backend = $this->getCacheBackend();
 
     // Create two cache entries with the same tag and tag value.
-    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, array('test_tag:2'));
-    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, array('test_tag:2'));
+    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, ['test_tag:2']);
+    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, ['test_tag:2']);
     $this->assertTrue($backend->get('test_cid_invalidate1') && $backend->get('test_cid_invalidate2'), 'Two cache items were created.');
 
     // Invalidate test_tag of value 1. This should invalidate both entries.
-    Cache::invalidateTags(array('test_tag:2'));
+    Cache::invalidateTags(['test_tag:2']);
     $this->assertFalse($backend->get('test_cid_invalidate1') || $backend->get('test_cid_invalidate2'), 'Two cache items invalidated after invalidating a cache tag.');
     $this->assertTrue($backend->get('test_cid_invalidate1', TRUE) && $backend->get('test_cid_invalidate2', TRUE), 'Cache items not deleted after invalidating a cache tag.');
 
     // Create two cache entries with the same tag and an array tag value.
-    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, array('test_tag:1'));
-    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, array('test_tag:1'));
+    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, ['test_tag:1']);
+    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, ['test_tag:1']);
     $this->assertTrue($backend->get('test_cid_invalidate1') && $backend->get('test_cid_invalidate2'), 'Two cache items were created.');
 
     // Invalidate test_tag of value 1. This should invalidate both entries.
-    Cache::invalidateTags(array('test_tag:1'));
+    Cache::invalidateTags(['test_tag:1']);
     $this->assertFalse($backend->get('test_cid_invalidate1') || $backend->get('test_cid_invalidate2'), 'Two caches removed after invalidating a cache tag.');
     $this->assertTrue($backend->get('test_cid_invalidate1', TRUE) && $backend->get('test_cid_invalidate2', TRUE), 'Cache items not deleted after invalidating a cache tag.');
 
     // Create three cache entries with a mix of tags and tag values.
-    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, array('test_tag:1'));
-    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, array('test_tag:2'));
-    $backend->set('test_cid_invalidate3', $this->defaultValue, Cache::PERMANENT, array('test_tag_foo:3'));
+    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, ['test_tag:1']);
+    $backend->set('test_cid_invalidate2', $this->defaultValue, Cache::PERMANENT, ['test_tag:2']);
+    $backend->set('test_cid_invalidate3', $this->defaultValue, Cache::PERMANENT, ['test_tag_foo:3']);
     $this->assertTrue($backend->get('test_cid_invalidate1') && $backend->get('test_cid_invalidate2') && $backend->get('test_cid_invalidate3'), 'Three cached items were created.');
-    Cache::invalidateTags(array('test_tag_foo:3'));
+    Cache::invalidateTags(['test_tag_foo:3']);
     $this->assertTrue($backend->get('test_cid_invalidate1') && $backend->get('test_cid_invalidate2'), 'Cache items not matching the tag were not invalidated.');
     $this->assertFalse($backend->get('test_cid_invalidated3'), 'Cached item matching the tag was removed.');
 
     // Create cache entry in multiple bins. Two cache entries
     // (test_cid_invalidate1 and test_cid_invalidate2) still exist from previous
     // tests.
-    $tags = array('test_tag:1', 'test_tag:2', 'test_tag:3');
-    $bins = array('path', 'bootstrap', 'page');
+    $tags = ['test_tag:1', 'test_tag:2', 'test_tag:3'];
+    $bins = ['path', 'bootstrap', 'page'];
     foreach ($bins as $bin) {
       $this->getCacheBackend($bin)->set('test', $this->defaultValue, Cache::PERMANENT, $tags);
       $this->assertTrue($this->getCacheBackend($bin)->get('test'), 'Cache item was set in bin.');
     }
 
-    Cache::invalidateTags(array('test_tag:2'));
+    Cache::invalidateTags(['test_tag:2']);
 
     // Test that the cache entry has been invalidated in multiple bins.
     foreach ($bins as $bin) {
diff --git a/core/tests/Drupal/KernelTests/Core/Common/SizeTest.php b/core/tests/Drupal/KernelTests/Core/Common/SizeTest.php
index 2bcee75390e84fc23fb93d5faae1d9663afed303..a759bb5c16dc601a11cd16ec936158e06f0b3d9c 100644
--- a/core/tests/Drupal/KernelTests/Core/Common/SizeTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Common/SizeTest.php
@@ -18,7 +18,7 @@ class SizeTest extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
     $kb = Bytes::KILOBYTE;
-    $this->exactTestCases = array(
+    $this->exactTestCases = [
       '1 byte' => 1,
       '1 KB'   => $kb,
       '1 MB'   => $kb * $kb,
@@ -28,21 +28,21 @@ protected function setUp() {
       '1 EB'   => $kb * $kb * $kb * $kb * $kb * $kb,
       '1 ZB'   => $kb * $kb * $kb * $kb * $kb * $kb * $kb,
       '1 YB'   => $kb * $kb * $kb * $kb * $kb * $kb * $kb * $kb,
-    );
-    $this->roundedTestCases = array(
+    ];
+    $this->roundedTestCases = [
       '2 bytes' => 2,
       '1 MB' => ($kb * $kb) - 1, // rounded to 1 MB (not 1000 or 1024 kilobyte!)
       round(3623651 / ($this->exactTestCases['1 MB']), 2) . ' MB' => 3623651, // megabytes
       round(67234178751368124 / ($this->exactTestCases['1 PB']), 2) . ' PB' => 67234178751368124, // petabytes
       round(235346823821125814962843827 / ($this->exactTestCases['1 YB']), 2) . ' YB' => 235346823821125814962843827, // yottabytes
-    );
+    ];
   }
 
   /**
    * Checks that format_size() returns the expected string.
    */
   function testCommonFormatSize() {
-    foreach (array($this->exactTestCases, $this->roundedTestCases) as $test_cases) {
+    foreach ([$this->exactTestCases, $this->roundedTestCases] as $test_cases) {
       foreach ($test_cases as $expected => $input) {
         $this->assertEqual(
           ($result = format_size($input, NULL)),
diff --git a/core/tests/Drupal/KernelTests/Core/Common/XssUnitTest.php b/core/tests/Drupal/KernelTests/Core/Common/XssUnitTest.php
index 7c68ed4554e6a8db9e9f3123a836116c648ab666..0a67384148d19fee6bdf045c882c358383446ced 100644
--- a/core/tests/Drupal/KernelTests/Core/Common/XssUnitTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Common/XssUnitTest.php
@@ -18,11 +18,11 @@ class XssUnitTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'system');
+  public static $modules = ['filter', 'system'];
 
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
   }
 
   /**
@@ -31,9 +31,9 @@ protected function setUp() {
   function testT() {
     $text = t('Simple text');
     $this->assertEqual($text, 'Simple text', 't leaves simple text alone.');
-    $text = t('Escaped text: @value', array('@value' => '<script>'));
+    $text = t('Escaped text: @value', ['@value' => '<script>']);
     $this->assertEqual($text, 'Escaped text: &lt;script&gt;', 't replaces and escapes string.');
-    $text = t('Placeholder text: %value', array('%value' => '<script>'));
+    $text = t('Placeholder text: %value', ['%value' => '<script>']);
     $this->assertEqual($text, 'Placeholder text: <em class="placeholder">&lt;script&gt;</em>', 't replaces, escapes and themes string.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigCRUDTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigCRUDTest.php
index 2af8b742c0f7ae0af63d3f5ad7a28352c5aa2850..6c40b1469d04e7ca40de4ca490828b192850d6f2 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigCRUDTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigCRUDTest.php
@@ -32,7 +32,7 @@ class ConfigCRUDTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Tests CRUD operations.
@@ -52,7 +52,7 @@ function testCRUD() {
 
     // Verify the active configuration contains the saved value.
     $actual_data = $storage->read($name);
-    $this->assertIdentical($actual_data, array('value' => 'initial'));
+    $this->assertIdentical($actual_data, ['value' => 'initial']);
 
     // Update the configuration object instance.
     $config->set('value', 'instance-update');
@@ -61,7 +61,7 @@ function testCRUD() {
 
     // Verify the active configuration contains the updated value.
     $actual_data = $storage->read($name);
-    $this->assertIdentical($actual_data, array('value' => 'instance-update'));
+    $this->assertIdentical($actual_data, ['value' => 'instance-update']);
 
     // Verify a call to $this->config() immediately returns the updated value.
     $new_config = $this->config($name);
@@ -75,7 +75,7 @@ function testCRUD() {
     $config->delete();
 
     // Verify the configuration object is empty.
-    $this->assertIdentical($config->get(), array());
+    $this->assertIdentical($config->get(), []);
     $this->assertIdentical($config->isNew(), TRUE);
 
     // Verify that all copies of the configuration has been removed from the
@@ -98,7 +98,7 @@ function testCRUD() {
 
     // Verify the active configuration contains the updated value.
     $actual_data = $storage->read($name);
-    $this->assertIdentical($actual_data, array('value' => 're-created'));
+    $this->assertIdentical($actual_data, ['value' => 're-created']);
 
     // Verify a call to $this->config() immediately returns the updated value.
     $new_config = $this->config($name);
@@ -115,7 +115,7 @@ function testCRUD() {
     // Ensure that the old configuration object is removed from both the cache
     // and the configuration storage.
     $config = $this->config($name);
-    $this->assertIdentical($config->get(), array());
+    $this->assertIdentical($config->get(), []);
     $this->assertIdentical($config->isNew(), TRUE);
 
     // Test renaming when config.factory does not have the object in its static
@@ -138,10 +138,10 @@ function testCRUD() {
 
     // Merge data into the configuration object.
     $new_config = $this->config($new_name);
-    $expected_values = array(
+    $expected_values = [
       'value' => 'herp',
       '404' => 'derp',
-    );
+    ];
     $new_config->merge($expected_values);
     $new_config->save();
     $this->assertIdentical($new_config->get('value'), $expected_values['value']);
@@ -181,7 +181,7 @@ function testNameValidation() {
     }
 
     // Verify that disallowed characters in the name cause an exception.
-    $characters = $test_characters = array(':', '?', '*', '<', '>', '"', '\'', '/', '\\');
+    $characters = $test_characters = [':', '?', '*', '<', '>', '"', '\'', '/', '\\'];
     foreach ($test_characters as $i => $c) {
       try {
         $name = 'namespace.object' . $c;
@@ -192,9 +192,9 @@ function testNameValidation() {
         unset($test_characters[$i]);
       }
     }
-    $this->assertTrue(empty($test_characters), format_string('Expected ConfigNameException was thrown for all invalid name characters: @characters', array(
+    $this->assertTrue(empty($test_characters), format_string('Expected ConfigNameException was thrown for all invalid name characters: @characters', [
       '@characters' => implode(' ', $characters),
-    )));
+    ]));
 
     // Verify that a valid config object name can be saved.
     $name = 'namespace.object';
@@ -217,7 +217,7 @@ function testValueValidation() {
     // Verify that setData() will catch dotted keys.
     $message = 'Expected ConfigValueException was thrown from setData() for value with dotted keys.';
     try {
-      $this->config('namespace.object')->setData(array('key.value' => 12))->save();
+      $this->config('namespace.object')->setData(['key.value' => 12])->save();
       $this->fail($message);
     }
     catch (ConfigValueException $e) {
@@ -227,7 +227,7 @@ function testValueValidation() {
     // Verify that set() will catch dotted keys.
     $message = 'Expected ConfigValueException was thrown from set() for value with dotted keys.';
     try {
-      $this->config('namespace.object')->set('foo', array('key.value' => 12))->save();
+      $this->config('namespace.object')->set('foo', ['key.value' => 12])->save();
       $this->fail($message);
     }
     catch (ConfigValueException $e) {
@@ -239,7 +239,7 @@ function testValueValidation() {
    * Tests data type handling.
    */
   public function testDataTypes() {
-    \Drupal::service('module_installer')->install(array('config_test'));
+    \Drupal::service('module_installer')->install(['config_test']);
     $storage = new DatabaseStorage($this->container->get('database'), 'config');
     $name = 'config_test.types';
     $config = $this->config($name);
@@ -247,8 +247,8 @@ public function testDataTypes() {
     $this->verbose('<pre>' . $original_content . "\n" . var_export($storage->read($name), TRUE));
 
     // Verify variable data types are intact.
-    $data = array(
-      'array' => array(),
+    $data = [
+      'array' => [],
       'boolean' => TRUE,
       'exp' => 1.2e+34,
       'float' => 3.14159,
@@ -258,7 +258,7 @@ public function testDataTypes() {
       'octal' => 0775,
       'string' => 'string',
       'string_int' => '1',
-    );
+    ];
     $data['_core']['default_config_hash'] = Crypt::hashBase64(serialize($data));
     $this->assertIdentical($config->get(), $data);
 
@@ -292,9 +292,9 @@ public function testDataTypes() {
       $this->fail('No Exception thrown upon saving invalid data type.');
     }
     catch (UnsupportedDataTypeConfigException $e) {
-      $this->pass(SafeMarkup::format('%class thrown upon saving invalid data type.', array(
+      $this->pass(SafeMarkup::format('%class thrown upon saving invalid data type.', [
         '%class' => get_class($e),
-      )));
+      ]));
     }
 
     // Test that setting an unsupported type for a config object with no schema
@@ -309,9 +309,9 @@ public function testDataTypes() {
       $this->fail('No Exception thrown upon saving invalid data type.');
     }
     catch (UnsupportedDataTypeConfigException $e) {
-      $this->pass(SafeMarkup::format('%class thrown upon saving invalid data type.', array(
+      $this->pass(SafeMarkup::format('%class thrown upon saving invalid data type.', [
         '%class' => get_class($e),
-      )));
+      ]));
     }
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigDependencyTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigDependencyTest.php
index 1c26774a6b87deb2162434e8fd6e0b9a33c97a11..79b01cba5d0485783bb4732d5e2d7aa02e1163c6 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigDependencyTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigDependencyTest.php
@@ -21,20 +21,20 @@ class ConfigDependencyTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test', 'entity_test', 'user');
+  public static $modules = ['config_test', 'entity_test', 'user'];
 
   /**
    * Tests that calculating dependencies for system module.
    */
   public function testNonEntity() {
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
     $config_manager = \Drupal::service('config.manager');
-    $dependents = $config_manager->findConfigEntityDependents('module', array('system'));
+    $dependents = $config_manager->findConfigEntityDependents('module', ['system']);
     $this->assertTrue(isset($dependents['system.site']), 'Simple configuration system.site has a UUID key even though it is not a configuration entity and therefore is found when looking for dependencies of the System module.');
     // Ensure that calling
     // \Drupal\Core\Config\ConfigManager::findConfigEntityDependentsAsEntities()
     // does not try to load system.site as an entity.
-    $config_manager->findConfigEntityDependentsAsEntities('module', array('system'));
+    $config_manager->findConfigEntityDependentsAsEntities('module', ['system']);
   }
 
   /**
@@ -46,22 +46,22 @@ public function testDependencyManagement() {
     $storage = $this->container->get('entity.manager')->getStorage('config_test');
     // Test dependencies between modules.
     $entity1 = $storage->create(
-      array(
+      [
         'id' => 'entity1',
-        'dependencies' => array(
-          'enforced' => array(
-            'module' => array('node')
-          )
-        )
-      )
+        'dependencies' => [
+          'enforced' => [
+            'module' => ['node']
+          ]
+        ]
+      ]
     );
     $entity1->save();
 
-    $dependents = $config_manager->findConfigEntityDependents('module', array('node'));
+    $dependents = $config_manager->findConfigEntityDependents('module', ['node']);
     $this->assertTrue(isset($dependents['config_test.dynamic.entity1']), 'config_test.dynamic.entity1 has a dependency on the Node module.');
-    $dependents = $config_manager->findConfigEntityDependents('module', array('config_test'));
+    $dependents = $config_manager->findConfigEntityDependents('module', ['config_test']);
     $this->assertTrue(isset($dependents['config_test.dynamic.entity1']), 'config_test.dynamic.entity1 has a dependency on the config_test module.');
-    $dependents = $config_manager->findConfigEntityDependents('module', array('views'));
+    $dependents = $config_manager->findConfigEntityDependents('module', ['views']);
     $this->assertFalse(isset($dependents['config_test.dynamic.entity1']), 'config_test.dynamic.entity1 does not have a dependency on the Views module.');
     // Ensure that the provider of the config entity is not actually written to
     // the dependencies array.
@@ -70,22 +70,22 @@ public function testDependencyManagement() {
     $this->assertTrue(empty($root_module_dependencies), 'Node module is not written to the root dependencies array as it is enforced.');
 
     // Create additional entities to test dependencies on config entities.
-    $entity2 = $storage->create(array('id' => 'entity2', 'dependencies' => array('enforced' => array('config' => array($entity1->getConfigDependencyName())))));
+    $entity2 = $storage->create(['id' => 'entity2', 'dependencies' => ['enforced' => ['config' => [$entity1->getConfigDependencyName()]]]]);
     $entity2->save();
-    $entity3 = $storage->create(array('id' => 'entity3', 'dependencies' => array('enforced' => array('config' => array($entity2->getConfigDependencyName())))));
+    $entity3 = $storage->create(['id' => 'entity3', 'dependencies' => ['enforced' => ['config' => [$entity2->getConfigDependencyName()]]]]);
     $entity3->save();
-    $entity4 = $storage->create(array('id' => 'entity4', 'dependencies' => array('enforced' => array('config' => array($entity3->getConfigDependencyName())))));
+    $entity4 = $storage->create(['id' => 'entity4', 'dependencies' => ['enforced' => ['config' => [$entity3->getConfigDependencyName()]]]]);
     $entity4->save();
 
     // Test getting $entity1's dependencies as configuration dependency objects.
-    $dependents = $config_manager->findConfigEntityDependents('config', array($entity1->getConfigDependencyName()));
+    $dependents = $config_manager->findConfigEntityDependents('config', [$entity1->getConfigDependencyName()]);
     $this->assertFalse(isset($dependents['config_test.dynamic.entity1']), 'config_test.dynamic.entity1 does not have a dependency on itself.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity2']), 'config_test.dynamic.entity2 has a dependency on config_test.dynamic.entity1.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity3']), 'config_test.dynamic.entity3 has a dependency on config_test.dynamic.entity1.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity4']), 'config_test.dynamic.entity4 has a dependency on config_test.dynamic.entity1.');
 
     // Test getting $entity2's dependencies as entities.
-    $dependents = $config_manager->findConfigEntityDependentsAsEntities('config', array($entity2->getConfigDependencyName()));
+    $dependents = $config_manager->findConfigEntityDependentsAsEntities('config', [$entity2->getConfigDependencyName()]);
     $dependent_ids = $this->getDependentIds($dependents);
     $this->assertFalse(in_array('config_test:entity1', $dependent_ids), 'config_test.dynamic.entity1 does not have a dependency on config_test.dynamic.entity1.');
     $this->assertFalse(in_array('config_test:entity2', $dependent_ids), 'config_test.dynamic.entity2 does not have a dependency on itself.');
@@ -94,7 +94,7 @@ public function testDependencyManagement() {
 
     // Test getting node module's dependencies as configuration dependency
     // objects.
-    $dependents = $config_manager->findConfigEntityDependents('module', array('node'));
+    $dependents = $config_manager->findConfigEntityDependents('module', ['node']);
     $this->assertTrue(isset($dependents['config_test.dynamic.entity1']), 'config_test.dynamic.entity1 has a dependency on the Node module.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity2']), 'config_test.dynamic.entity2 has a dependency on the Node module.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity3']), 'config_test.dynamic.entity3 has a dependency on the Node module.');
@@ -105,20 +105,20 @@ public function testDependencyManagement() {
     // no longer depend on node module.
     $entity1->setEnforcedDependencies([])->save();
     $entity3->setEnforcedDependencies(['module' => ['node'], 'config' => [$entity2->getConfigDependencyName()]])->save();
-    $dependents = $config_manager->findConfigEntityDependents('module', array('node'));
+    $dependents = $config_manager->findConfigEntityDependents('module', ['node']);
     $this->assertFalse(isset($dependents['config_test.dynamic.entity1']), 'config_test.dynamic.entity1 does not have a dependency on the Node module.');
     $this->assertFalse(isset($dependents['config_test.dynamic.entity2']), 'config_test.dynamic.entity2 does not have a dependency on the Node module.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity3']), 'config_test.dynamic.entity3 has a dependency on the Node module.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity4']), 'config_test.dynamic.entity4 has a dependency on the Node module.');
 
     // Test dependency on a content entity.
-    $entity_test = EntityTest::create(array(
+    $entity_test = EntityTest::create([
       'name' => $this->randomString(),
       'type' => 'entity_test',
-    ));
+    ]);
     $entity_test->save();
     $entity2->setEnforcedDependencies(['config' => [$entity1->getConfigDependencyName()], 'content' => [$entity_test->getConfigDependencyName()]])->save();;
-    $dependents = $config_manager->findConfigEntityDependents('content', array($entity_test->getConfigDependencyName()));
+    $dependents = $config_manager->findConfigEntityDependents('content', [$entity_test->getConfigDependencyName()]);
     $this->assertFalse(isset($dependents['config_test.dynamic.entity1']), 'config_test.dynamic.entity1 does not have a dependency on the content entity.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity2']), 'config_test.dynamic.entity2 has a dependency on the content entity.');
     $this->assertTrue(isset($dependents['config_test.dynamic.entity3']), 'config_test.dynamic.entity3 has a dependency on the content entity (via entity2).');
@@ -127,10 +127,10 @@ public function testDependencyManagement() {
     // Create a configuration entity of a different type with the same ID as one
     // of the entities already created.
     $alt_storage = $this->container->get('entity.manager')->getStorage('config_query_test');
-    $alt_storage->create(array('id' => 'entity1', 'dependencies' => array('enforced' => array('config' => array($entity1->getConfigDependencyName())))))->save();
-    $alt_storage->create(array('id' => 'entity2', 'dependencies' => array('enforced' => array('module' => array('views')))))->save();
+    $alt_storage->create(['id' => 'entity1', 'dependencies' => ['enforced' => ['config' => [$entity1->getConfigDependencyName()]]]])->save();
+    $alt_storage->create(['id' => 'entity2', 'dependencies' => ['enforced' => ['module' => ['views']]]])->save();
 
-    $dependents = $config_manager->findConfigEntityDependentsAsEntities('config', array($entity1->getConfigDependencyName()));
+    $dependents = $config_manager->findConfigEntityDependentsAsEntities('config', [$entity1->getConfigDependencyName()]);
     $dependent_ids = $this->getDependentIds($dependents);
     $this->assertFalse(in_array('config_test:entity1', $dependent_ids), 'config_test.dynamic.entity1 does not have a dependency on itself.');
     $this->assertTrue(in_array('config_test:entity2', $dependent_ids), 'config_test.dynamic.entity2 has a dependency on config_test.dynamic.entity1.');
@@ -139,7 +139,7 @@ public function testDependencyManagement() {
     $this->assertTrue(in_array('config_query_test:entity1', $dependent_ids), 'config_query_test.dynamic.entity1 has a dependency on config_test.dynamic.entity1.');
     $this->assertFalse(in_array('config_query_test:entity2', $dependent_ids), 'config_query_test.dynamic.entity2 does not have a dependency on config_test.dynamic.entity1.');
 
-    $dependents = $config_manager->findConfigEntityDependentsAsEntities('module', array('node', 'views'));
+    $dependents = $config_manager->findConfigEntityDependentsAsEntities('module', ['node', 'views']);
     $dependent_ids = $this->getDependentIds($dependents);
     $this->assertFalse(in_array('config_test:entity1', $dependent_ids), 'config_test.dynamic.entity1 does not have a dependency on Views or Node.');
     $this->assertFalse(in_array('config_test:entity2', $dependent_ids), 'config_test.dynamic.entity2 does not have a dependency on Views or Node.');
@@ -148,7 +148,7 @@ public function testDependencyManagement() {
     $this->assertFalse(in_array('config_query_test:entity1', $dependent_ids), 'config_test.query.entity1 does not have a dependency on Views or Node.');
     $this->assertTrue(in_array('config_query_test:entity2', $dependent_ids), 'config_test.query.entity2 has a dependency on Views or Node.');
 
-    $dependents = $config_manager->findConfigEntityDependentsAsEntities('module', array('config_test'));
+    $dependents = $config_manager->findConfigEntityDependentsAsEntities('module', ['config_test']);
     $dependent_ids = $this->getDependentIds($dependents);
     $this->assertTrue(in_array('config_test:entity1', $dependent_ids), 'config_test.dynamic.entity1 has a dependency on config_test module.');
     $this->assertTrue(in_array('config_test:entity2', $dependent_ids), 'config_test.dynamic.entity2 has a dependency on config_test module.');
@@ -194,25 +194,25 @@ public function testConfigEntityUninstall() {
       ->getStorage('config_test');
     // Test dependencies between modules.
     $entity1 = $storage->create(
-      array(
+      [
         'id' => 'entity1',
-        'dependencies' => array(
-          'enforced' => array(
-            'module' => array('node', 'config_test')
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'module' => ['node', 'config_test']
+          ],
+        ],
+      ]
     );
     $entity1->save();
     $entity2 = $storage->create(
-      array(
+      [
         'id' => 'entity2',
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity1->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity1->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity2->save();
     // Perform a module rebuild so we can know where the node module is located
@@ -258,14 +258,14 @@ public function testConfigEntityUninstallComplex(array $entity_id_suffixes) {
       ->getStorage('config_test');
     // Entity 1 will be deleted because it depends on node.
     $entity_1 = $storage->create(
-      array(
+      [
         'id' => 'entity_' . $entity_id_suffixes[0],
-        'dependencies' => array(
-          'enforced' => array(
-            'module' => array('node', 'config_test')
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'module' => ['node', 'config_test']
+          ],
+        ],
+      ]
     );
     $entity_1->save();
 
@@ -273,14 +273,14 @@ public function testConfigEntityUninstallComplex(array $entity_id_suffixes) {
     // \Drupal\config_test\Entity::onDependencyRemoval() will remove the
     // dependency before config entities are deleted.
     $entity_2 = $storage->create(
-      array(
+      [
         'id' => 'entity_' . $entity_id_suffixes[1],
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity_1->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity_1->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity_2->save();
 
@@ -288,34 +288,34 @@ public function testConfigEntityUninstallComplex(array $entity_id_suffixes) {
     // be fixed. The ConfigEntityInterface::onDependencyRemoval() method will
     // not be called for this entity.
     $entity_3 = $storage->create(
-      array(
+      [
         'id' => 'entity_' . $entity_id_suffixes[2],
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity_2->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity_2->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity_3->save();
 
     // Entity 4's config dependency will be fixed but it will still be deleted
     // because it also depends on the node module.
     $entity_4 = $storage->create(
-      array(
+      [
         'id' => 'entity_' . $entity_id_suffixes[3],
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity_1->getConfigDependencyName()),
-            'module' => array('node', 'config_test')
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity_1->getConfigDependencyName()],
+            'module' => ['node', 'config_test']
+          ],
+        ],
+      ]
     );
     $entity_4->save();
 
     // Set a more complicated test where dependencies will be fixed.
-    \Drupal::state()->set('config_test.fix_dependencies', array($entity_1->getConfigDependencyName()));
+    \Drupal::state()->set('config_test.fix_dependencies', [$entity_1->getConfigDependencyName()]);
     \Drupal::state()->set('config_test.on_dependency_removal_called', []);
 
     // Do a dry run using
@@ -341,7 +341,7 @@ public function testConfigEntityUninstallComplex(array $entity_id_suffixes) {
     $this->assertFalse($storage->load($entity_1->id()), 'Entity 1 deleted');
     $entity_2 = $storage->load($entity_2->id());
     $this->assertTrue($entity_2, 'Entity 2 not deleted');
-    $this->assertEqual($entity_2->calculateDependencies()->getDependencies()['config'], array(), 'Entity 2 dependencies updated to remove dependency on entity 1.');
+    $this->assertEqual($entity_2->calculateDependencies()->getDependencies()['config'], [], 'Entity 2 dependencies updated to remove dependency on entity 1.');
     $entity_3 = $storage->load($entity_3->id());
     $this->assertTrue($entity_3, 'Entity 3 not deleted');
     $this->assertEqual($entity_3->calculateDependencies()->getDependencies()['config'], [$entity_2->getConfigDependencyName()], 'Entity 3 still depends on entity 2.');
@@ -475,20 +475,20 @@ public function testConfigEntityDelete() {
     $storage = $this->container->get('entity.manager')->getStorage('config_test');
     // Test dependencies between configuration entities.
     $entity1 = $storage->create(
-      array(
+      [
         'id' => 'entity1'
-      )
+      ]
     );
     $entity1->save();
     $entity2 = $storage->create(
-      array(
+      [
         'id' => 'entity2',
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity1->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity1->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity2->save();
 
@@ -506,13 +506,13 @@ public function testConfigEntityDelete() {
     $this->assertFalse($storage->load('entity2'), 'Entity 2 deleted');
 
     // Set a more complicated test where dependencies will be fixed.
-    \Drupal::state()->set('config_test.fix_dependencies', array($entity1->getConfigDependencyName()));
+    \Drupal::state()->set('config_test.fix_dependencies', [$entity1->getConfigDependencyName()]);
 
     // Entity1 will be deleted by the test.
     $entity1 = $storage->create(
-      array(
+      [
         'id' => 'entity1',
-      )
+      ]
     );
     $entity1->save();
 
@@ -520,28 +520,28 @@ public function testConfigEntityDelete() {
     // \Drupal\config_test\Entity::onDependencyRemoval() will remove the
     // dependency before config entities are deleted.
     $entity2 = $storage->create(
-      array(
+      [
         'id' => 'entity2',
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity1->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity1->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity2->save();
 
     // Entity3 will be unchanged because it is dependent on Entity2 which can
     // be fixed.
     $entity3 = $storage->create(
-      array(
+      [
         'id' => 'entity3',
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity2->getConfigDependencyName()),
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity2->getConfigDependencyName()],
+          ],
+        ],
+      ]
     );
     $entity3->save();
 
@@ -559,7 +559,7 @@ public function testConfigEntityDelete() {
     $this->assertFalse($storage->load('entity1'), 'Entity 1 deleted');
     $entity2 = $storage->load('entity2');
     $this->assertTrue($entity2, 'Entity 2 not deleted');
-    $this->assertEqual($entity2->calculateDependencies()->getDependencies()['config'], array(), 'Entity 2 dependencies updated to remove dependency on Entity1.');
+    $this->assertEqual($entity2->calculateDependencies()->getDependencies()['config'], [], 'Entity 2 dependencies updated to remove dependency on Entity1.');
     $entity3 = $storage->load('entity3');
     $this->assertTrue($entity3, 'Entity 3 not deleted');
     $this->assertEqual($entity3->calculateDependencies()->getDependencies()['config'], [$entity2->getConfigDependencyName()], 'Entity 3 still depends on Entity 2.');
@@ -585,30 +585,30 @@ public function testContentEntityDelete() {
     /** @var \Drupal\Core\Config\Entity\ConfigEntityStorage $storage */
     $storage = $this->container->get('entity.manager')->getStorage('config_test');
     $entity1 = $storage->create(
-      array(
+      [
         'id' => 'entity1',
-        'dependencies' => array(
-          'enforced' => array(
-            'content' => array($content_entity->getConfigDependencyName())
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'content' => [$content_entity->getConfigDependencyName()]
+          ],
+        ],
+      ]
     );
     $entity1->save();
     $entity2 = $storage->create(
-      array(
+      [
         'id' => 'entity2',
-        'dependencies' => array(
-          'enforced' => array(
-            'config' => array($entity1->getConfigDependencyName())
-          ),
-        ),
-      )
+        'dependencies' => [
+          'enforced' => [
+            'config' => [$entity1->getConfigDependencyName()]
+          ],
+        ],
+      ]
     );
     $entity2->save();
 
     // Create a configuration entity that is not in the dependency chain.
-    $entity3 = $storage->create(array('id' => 'entity3'));
+    $entity3 = $storage->create(['id' => 'entity3']);
     $entity3->save();
 
     $config_entities = $config_manager->getConfigEntitiesToChangeOnDependencyRemoval('content', [$content_entity->getConfigDependencyName()]);
@@ -628,7 +628,7 @@ public function testContentEntityDelete() {
    *   An array with values of entity_type_id:ID
    */
   protected function getDependentIds(array $dependents) {
-    $dependent_ids = array();
+    $dependent_ids = [];
     foreach ($dependents as $dependent) {
       $dependent_ids[] = $dependent->getEntityTypeId() . ':' . $dependent->id();
     }
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigDiffTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigDiffTest.php
index 409b7948e66e7fea9a0a7768beb313dc8ef6172c..6fd5c4edbf36c65352cd29932e688dda447f91d1 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigDiffTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigDiffTest.php
@@ -16,7 +16,7 @@ class ConfigDiffTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test', 'system');
+  public static $modules = ['config_test', 'system'];
 
   /**
    * Tests calculating the difference between two sets of configuration.
@@ -32,7 +32,7 @@ function testDiff() {
     $change_data = 'foobar';
 
     // Install the default config.
-    $this->installConfig(array('config_test'));
+    $this->installConfig(['config_test']);
     $original_data = \Drupal::config($config_name)->get();
 
     // Change a configuration value in sync.
@@ -75,10 +75,10 @@ function testDiff() {
 
     // Test diffing a renamed config entity.
     $test_entity_id = $this->randomMachineName();
-    $test_entity = entity_create('config_test', array(
+    $test_entity = entity_create('config_test', [
       'id' => $test_entity_id,
       'label' => $this->randomMachineName(),
-    ));
+    ]);
     $test_entity->save();
     $data = $active->read('config_test.dynamic.' . $test_entity_id);
     $sync->write('config_test.dynamic.' . $test_entity_id, $data);
@@ -117,12 +117,12 @@ function testCollectionDiff() {
     $sync_test_collection = $sync->createCollection('test');
 
     $config_name = 'config_test.test';
-    $data = array('foo' => 'bar');
+    $data = ['foo' => 'bar'];
 
     $active->write($config_name, $data);
     $sync->write($config_name, $data);
     $active_test_collection->write($config_name, $data);
-    $sync_test_collection->write($config_name, array('foo' => 'baz'));
+    $sync_test_collection->write($config_name, ['foo' => 'baz']);
 
     // Test the fields match in the default collection diff.
     $diff = \Drupal::service('config.manager')->diff($active, $sync, $config_name);
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityNormalizeTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityNormalizeTest.php
index bfa823383df1e6cd50924d13c3e6fa25dcf2f767..5a137b9f4f4e00d6525834ceea8606160fa01993 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityNormalizeTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityNormalizeTest.php
@@ -16,7 +16,7 @@ class ConfigEntityNormalizeTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -24,15 +24,15 @@ protected function setUp() {
   }
 
   public function testNormalize() {
-    $config_entity = entity_create('config_test', array('id' => 'system', 'label' => 'foobar', 'weight' => 1));
+    $config_entity = entity_create('config_test', ['id' => 'system', 'label' => 'foobar', 'weight' => 1]);
     $config_entity->save();
 
     // Modify stored config entity, this is comparable with a schema change.
     $config = $this->config('config_test.dynamic.system');
-    $data = array(
+    $data = [
       'label' => 'foobar',
       'additional_key' => TRUE
-    ) + $config->getRawData();
+    ] + $config->getRawData();
     $config->setData($data)->save();
     $this->assertNotIdentical($config_entity->toArray(), $config->getRawData(), 'Stored config entity is not is equivalent to config schema.');
 
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStaticCacheTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStaticCacheTest.php
index 6733415f46593a570a0f28d1dea33a54d1b3683f..3c3f70b65409f04ce1e15de2e857f4c687ad0a36 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStaticCacheTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStaticCacheTest.php
@@ -17,7 +17,7 @@ class ConfigEntityStaticCacheTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test', 'config_entity_static_cache_test');
+  public static $modules = ['config_test', 'config_entity_static_cache_test'];
 
   /**
    * The type ID of the entity under test.
@@ -42,7 +42,7 @@ protected function setUp() {
     $this->entityId = 'test_1';
     $this->container->get('entity_type.manager')
       ->getStorage($this->entityTypeId)
-      ->create(array('id' => $this->entityId, 'label' => 'Original label'))
+      ->create(['id' => $this->entityId, 'label' => 'Original label'])
       ->save();
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStatusTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStatusTest.php
index 14765ef526e3ed2ac957cb1d166279bec8ecb677..55610bfc934ea0563a6deabc3132f3c762762e3c 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStatusTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStatusTest.php
@@ -16,15 +16,15 @@ class ConfigEntityStatusTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Tests the enabling/disabling of entities.
    */
   function testCRUD() {
-    $entity = entity_create('config_test', array(
+    $entity = entity_create('config_test', [
       'id' => strtolower($this->randomMachineName()),
-    ));
+    ]);
     $this->assertTrue($entity->status(), 'Default status is enabled.');
     $entity->save();
     $this->assertTrue($entity->status(), 'Status is enabled after saving.');
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStorageTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStorageTest.php
index 5b7022a4d9a8dcfbf641fff13dd293b08358d710..bf41e1de505078b1dfe6656a9cdd4f0a7a3b4fe4 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityStorageTest.php
@@ -18,7 +18,7 @@ class ConfigEntityStorageTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Tests creating configuration entities with changed UUIDs.
@@ -43,7 +43,7 @@ public function testUUIDConflict() {
       $this->fail('Exception thrown when attempting to save a configuration entity with a UUID that does not match the existing UUID.');
     }
     catch (ConfigDuplicateUUIDException $e) {
-      $this->pass(format_string('Exception thrown when attempting to save a configuration entity with a UUID that does not match existing data: %e.', array('%e' => $e)));
+      $this->pass(format_string('Exception thrown when attempting to save a configuration entity with a UUID that does not match existing data: %e.', ['%e' => $e]));
     }
 
     // Ensure that the config entity was not corrupted.
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityUnitTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityUnitTest.php
index 04c12c41e905bdbadd8b7fc97691686a98fbd686..0010da78601d81c244b6a0b3652daee3fd12c835 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityUnitTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityUnitTest.php
@@ -25,7 +25,7 @@ class ConfigEntityUnitTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * The config_test entity storage.
@@ -57,19 +57,19 @@ public function testStorageMethods() {
     // Create three entities, two with the same style.
     $style = $this->randomMachineName(8);
     for ($i = 0; $i < 2; $i++) {
-      $entity = $this->storage->create(array(
+      $entity = $this->storage->create([
         'id' => $this->randomMachineName(),
         'label' => $this->randomString(),
         'style' => $style,
-      ));
+      ]);
       $entity->save();
     }
-    $entity = $this->storage->create(array(
+    $entity = $this->storage->create([
       'id' => $this->randomMachineName(),
       'label' => $this->randomString(),
       // Use a different length for the entity to ensure uniqueness.
       'style' => $this->randomMachineName(9),
-    ));
+    ]);
     $entity->save();
 
     // Ensure that the configuration entity can be loaded by UUID.
@@ -85,7 +85,7 @@ public function testStorageMethods() {
     $entities = $this->storage->loadByProperties();
     $this->assertEqual(count($entities), 3, 'Three entities are loaded when no properties are specified.');
 
-    $entities = $this->storage->loadByProperties(array('style' => $style));
+    $entities = $this->storage->loadByProperties(['style' => $style]);
     $this->assertEqual(count($entities), 2, 'Two entities are loaded when the style property is specified.');
 
     // Assert that both returned entities have a matching style property.
@@ -94,11 +94,11 @@ public function testStorageMethods() {
     }
 
     // Test that schema type enforcement can be overridden by trusting the data.
-    $entity = $this->storage->create(array(
+    $entity = $this->storage->create([
       'id' => $this->randomMachineName(),
       'label' => $this->randomString(),
       'style' => 999
-    ));
+    ]);
     $entity->save();
     $this->assertIdentical('999', $entity->style);
     $entity->style = 999;
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigEventsTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigEventsTest.php
index 7c0680589e2343f4b1be545dc858ecd907675ab6..b39231531d267651dd98fb63bf4a857a8a672c92 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigEventsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigEventsTest.php
@@ -18,7 +18,7 @@ class ConfigEventsTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_events_test');
+  public static $modules = ['config_events_test'];
 
   /**
    * Tests configuration events.
@@ -28,28 +28,28 @@ function testConfigEvents() {
 
     $config = new Config($name, \Drupal::service('config.storage'), \Drupal::service('event_dispatcher'), \Drupal::service('config.typed'));
     $config->set('key', 'initial');
-    $this->assertIdentical(\Drupal::state()->get('config_events_test.event', array()), array(), 'No events fired by creating a new configuration object');
+    $this->assertIdentical(\Drupal::state()->get('config_events_test.event', []), [], 'No events fired by creating a new configuration object');
     $config->save();
 
-    $event = \Drupal::state()->get('config_events_test.event', array());
+    $event = \Drupal::state()->get('config_events_test.event', []);
     $this->assertIdentical($event['event_name'], ConfigEvents::SAVE);
-    $this->assertIdentical($event['current_config_data'], array('key' => 'initial'));
-    $this->assertIdentical($event['raw_config_data'], array('key' => 'initial'));
-    $this->assertIdentical($event['original_config_data'], array());
+    $this->assertIdentical($event['current_config_data'], ['key' => 'initial']);
+    $this->assertIdentical($event['raw_config_data'], ['key' => 'initial']);
+    $this->assertIdentical($event['original_config_data'], []);
 
     $config->set('key', 'updated')->save();
-    $event = \Drupal::state()->get('config_events_test.event', array());
+    $event = \Drupal::state()->get('config_events_test.event', []);
     $this->assertIdentical($event['event_name'], ConfigEvents::SAVE);
-    $this->assertIdentical($event['current_config_data'], array('key' => 'updated'));
-    $this->assertIdentical($event['raw_config_data'], array('key' => 'updated'));
-    $this->assertIdentical($event['original_config_data'], array('key' => 'initial'));
+    $this->assertIdentical($event['current_config_data'], ['key' => 'updated']);
+    $this->assertIdentical($event['raw_config_data'], ['key' => 'updated']);
+    $this->assertIdentical($event['original_config_data'], ['key' => 'initial']);
 
     $config->delete();
-    $event = \Drupal::state()->get('config_events_test.event', array());
+    $event = \Drupal::state()->get('config_events_test.event', []);
     $this->assertIdentical($event['event_name'], ConfigEvents::DELETE);
-    $this->assertIdentical($event['current_config_data'], array());
-    $this->assertIdentical($event['raw_config_data'], array());
-    $this->assertIdentical($event['original_config_data'], array('key' => 'updated'));
+    $this->assertIdentical($event['current_config_data'], []);
+    $this->assertIdentical($event['raw_config_data'], []);
+    $this->assertIdentical($event['original_config_data'], ['key' => 'updated']);
   }
 
   /**
@@ -58,24 +58,24 @@ function testConfigEvents() {
   function testConfigRenameEvent() {
     $name = 'config_events_test.test';
     $new_name = 'config_events_test.test_rename';
-    $GLOBALS['config'][$name] = array('key' => 'overridden');
-    $GLOBALS['config'][$new_name] = array('key' => 'new overridden');
+    $GLOBALS['config'][$name] = ['key' => 'overridden'];
+    $GLOBALS['config'][$new_name] = ['key' => 'new overridden'];
 
     $config = $this->config($name);
     $config->set('key', 'initial')->save();
-    $event = \Drupal::state()->get('config_events_test.event', array());
+    $event = \Drupal::state()->get('config_events_test.event', []);
     $this->assertIdentical($event['event_name'], ConfigEvents::SAVE);
-    $this->assertIdentical($event['current_config_data'], array('key' => 'initial'));
+    $this->assertIdentical($event['current_config_data'], ['key' => 'initial']);
 
     // Override applies when getting runtime config.
     $this->assertEqual($GLOBALS['config'][$name], \Drupal::config($name)->get());
 
     \Drupal::configFactory()->rename($name, $new_name);
-    $event = \Drupal::state()->get('config_events_test.event', array());
+    $event = \Drupal::state()->get('config_events_test.event', []);
     $this->assertIdentical($event['event_name'], ConfigEvents::RENAME);
-    $this->assertIdentical($event['current_config_data'], array('key' => 'new overridden'));
-    $this->assertIdentical($event['raw_config_data'], array('key' => 'initial'));
-    $this->assertIdentical($event['original_config_data'], array('key' => 'new overridden'));
+    $this->assertIdentical($event['current_config_data'], ['key' => 'new overridden']);
+    $this->assertIdentical($event['raw_config_data'], ['key' => 'initial']);
+    $this->assertIdentical($event['original_config_data'], ['key' => 'new overridden']);
   }
 
 }
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigFileContentTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigFileContentTest.php
index 40241f6b90c42357333454fee26d541e6ff99d44..854c0907fdfdcd10492bc5d5fcd99ebcfe2ce157 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigFileContentTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigFileContentTest.php
@@ -33,19 +33,19 @@ function testReadWriteConfig() {
     $nested_key = 'biff.bang';
     $nested_value = 'pow';
     $array_key = 'array';
-    $array_value = array(
+    $array_value = [
       'foo' => 'bar',
-      'biff' => array(
+      'biff' => [
         'bang' => 'pow',
-      ),
-    );
+      ],
+    ];
     $casting_array_key = 'casting_array';
     $casting_array_false_value_key = 'casting_array.cast.false';
-    $casting_array_value = array(
-      'cast' => array(
+    $casting_array_value = [
+      'cast' => [
         'false' => FALSE,
-      ),
-    );
+      ],
+    ];
     $nested_array_key = 'nested.array';
     $true_key = 'true';
     $false_key = 'false';
@@ -58,7 +58,7 @@ function testReadWriteConfig() {
     $this->assertTrue($config, 'Config object created.');
 
     // Verify the configuration object is empty.
-    $this->assertEqual($config->get(), array(), 'New config object is empty.');
+    $this->assertEqual($config->get(), [], 'New config object is empty.');
 
     // Verify nothing was saved.
     $data = $storage->read($name);
@@ -173,7 +173,7 @@ function testReadWriteConfig() {
     // Get file listing for all files starting with 'bar'. Should return
     // an empty array.
     $files = $storage->listAll('bar');
-    $this->assertEqual($files, array(), 'No files listed with the prefix \'bar\'.');
+    $this->assertEqual($files, [], 'No files listed with the prefix \'bar\'.');
 
     // Delete the configuration.
     $config = $this->config($name);
@@ -189,20 +189,20 @@ function testReadWriteConfig() {
    */
   function testSerialization() {
     $name = $this->randomMachineName(10) . '.' . $this->randomMachineName(10);
-    $config_data = array(
+    $config_data = [
       // Indexed arrays; the order of elements is essential.
-      'numeric keys' => array('i', 'n', 'd', 'e', 'x', 'e', 'd'),
+      'numeric keys' => ['i', 'n', 'd', 'e', 'x', 'e', 'd'],
       // Infinitely nested keys using arbitrary element names.
-      'nested keys' => array(
+      'nested keys' => [
         // HTML/XML in values.
         'HTML' => '<strong> <bold> <em> <blockquote>',
         // UTF-8 in values.
         'UTF-8' => 'FrançAIS is ÜBER-åwesome',
         // Unicode in keys and values.
         'ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ' => 'αβγδεζηθικλμνξοσὠ',
-      ),
+      ],
       'invalid xml' => '</title><script type="text/javascript">alert("Title XSS!");</script> & < > " \' ',
-    );
+    ];
 
     // Encode and write, and reload and decode the configuration data.
     $filestorage = new FileStorage(config_get_config_directory(CONFIG_SYNC_DIRECTORY));
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigImportRecreateTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigImportRecreateTest.php
index 570ca4c1bed0c72dfb4f5aac1c1387f84c210a8c..0523ee85bf43aa4f7a4f528d763fe944b4324e40 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigImportRecreateTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigImportRecreateTest.php
@@ -33,7 +33,7 @@ protected function setUp() {
     parent::setUp();
 
     $this->installEntitySchema('node');
-    $this->installConfig(array('field', 'node'));
+    $this->installConfig(['field', 'node']);
 
     $this->copyConfig($this->container->get('config.storage'), $this->container->get('config.storage.sync'));
 
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigImportRenameValidationTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigImportRenameValidationTest.php
index 48b9c4675da85e6aa60caa60a7ca979396249ecb..e755d5fd88b4679d5e3ae46b8204998c5b5efdf6 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigImportRenameValidationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigImportRenameValidationTest.php
@@ -40,7 +40,7 @@ protected function setUp() {
 
     $this->installEntitySchema('user');
     $this->installEntitySchema('node');
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
 
     // Set up the ConfigImporter object for testing.
     $storage_comparer = new StorageComparer(
@@ -67,10 +67,10 @@ protected function setUp() {
   public function testRenameValidation() {
     // Create a test entity.
     $test_entity_id = $this->randomMachineName();
-    $test_entity = entity_create('config_test', array(
+    $test_entity = entity_create('config_test', [
       'id' => $test_entity_id,
       'label' => $this->randomMachineName(),
-    ));
+    ]);
     $test_entity->save();
     $uuid = $test_entity->uuid();
 
@@ -91,9 +91,9 @@ public function testRenameValidation() {
     // Confirm that the staged configuration is detected as a rename since the
     // UUIDs match.
     $this->configImporter->reset();
-    $expected = array(
+    $expected = [
       'node.type.' . $content_type->id() . '::config_test.dynamic.' . $test_entity_id,
-    );
+    ];
     $renames = $this->configImporter->getUnprocessedConfiguration('rename');
     $this->assertIdentical($expected, $renames);
 
@@ -105,9 +105,9 @@ public function testRenameValidation() {
     }
     catch (ConfigImporterException $e) {
       $this->pass('Expected ConfigImporterException thrown when a renamed configuration entity does not match the existing entity type.');
-      $expected = array(
-        SafeMarkup::format('Entity type mismatch on rename. @old_type not equal to @new_type for existing configuration @old_name and staged configuration @new_name.', array('@old_type' => 'node_type', '@new_type' => 'config_test', '@old_name' => 'node.type.' . $content_type->id(), '@new_name' => 'config_test.dynamic.' . $test_entity_id))
-      );
+      $expected = [
+        SafeMarkup::format('Entity type mismatch on rename. @old_type not equal to @new_type for existing configuration @old_name and staged configuration @new_name.', ['@old_type' => 'node_type', '@new_type' => 'config_test', '@old_name' => 'node.type.' . $content_type->id(), '@new_name' => 'config_test.dynamic.' . $test_entity_id])
+      ];
       $this->assertEqual($expected, $this->configImporter->getErrors());
     }
   }
@@ -134,9 +134,9 @@ public function testRenameSimpleConfigValidation() {
     // Confirm that the staged configuration is detected as a rename since the
     // UUIDs match.
     $this->configImporter->reset();
-    $expected = array(
+    $expected = [
       'config_test.old::config_test.new'
-    );
+    ];
     $renames = $this->configImporter->getUnprocessedConfiguration('rename');
     $this->assertIdentical($expected, $renames);
 
@@ -148,9 +148,9 @@ public function testRenameSimpleConfigValidation() {
     }
     catch (ConfigImporterException $e) {
       $this->pass('Expected ConfigImporterException thrown when simple configuration is renamed.');
-      $expected = array(
-        SafeMarkup::format('Rename operation for simple configuration. Existing configuration @old_name and staged configuration @new_name.', array('@old_name' => 'config_test.old', '@new_name' => 'config_test.new'))
-      );
+      $expected = [
+        SafeMarkup::format('Rename operation for simple configuration. Existing configuration @old_name and staged configuration @new_name.', ['@old_name' => 'config_test.old', '@new_name' => 'config_test.new'])
+      ];
       $this->assertEqual($expected, $this->configImporter->getErrors());
     }
   }
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterMissingContentTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterMissingContentTest.php
index 55f64814f9aef9cae3e83358a8bfc470a167574b..93311952f99dd344bcd9b8eee417f430ba19f74d 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterMissingContentTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterMissingContentTest.php
@@ -26,14 +26,14 @@ class ConfigImporterMissingContentTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'entity_test', 'config_test', 'config_import_test');
+  public static $modules = ['system', 'user', 'entity_test', 'config_test', 'config_import_test'];
 
   protected function setUp() {
     parent::setUp();
     $this->installSchema('system', 'sequences');
     $this->installEntitySchema('entity_test');
     $this->installEntitySchema('user');
-    $this->installConfig(array('config_test'));
+    $this->installConfig(['config_test']);
     // Installing config_test's default configuration pollutes the global
     // variable being used for recording hook invocations by this test already,
     // so it has to be cleared out manually.
@@ -73,9 +73,9 @@ function testMissingContent() {
     // on two content entities that do not exist.
     $storage = $this->container->get('config.storage');
     $sync = $this->container->get('config.storage.sync');
-    $entity_one = EntityTest::create(array('name' => 'one'));
-    $entity_two = EntityTest::create(array('name' => 'two'));
-    $entity_three = EntityTest::create(array('name' => 'three'));
+    $entity_one = EntityTest::create(['name' => 'one']);
+    $entity_two = EntityTest::create(['name' => 'two']);
+    $entity_three = EntityTest::create(['name' => 'three']);
     $dynamic_name = 'config_test.dynamic.dotted.default';
     $original_dynamic_data = $storage->read($dynamic_name);
     // Entity one will be resolved by
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterTest.php
index bde5644ec6afed9002729ae9440c8fbec9e0b688..53ac7d19ef7e804cbb758455da8d510681fb651f 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterTest.php
@@ -28,12 +28,12 @@ class ConfigImporterTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test', 'system', 'config_import_test');
+  public static $modules = ['config_test', 'system', 'config_import_test'];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->installConfig(array('config_test'));
+    $this->installConfig(['config_test']);
     // Installing config_test's default configuration pollutes the global
     // variable being used for recording hook invocations by this test already,
     // so it has to be cleared out manually.
@@ -106,7 +106,7 @@ function testSiteUuidValidate() {
     catch (ConfigImporterException $e) {
       $this->assertEqual($e->getMessage(), 'There were errors validating the config synchronization.');
       $error_log = $this->configImporter->getErrors();
-      $expected = array('Site UUID in source storage does not match the target storage.');
+      $expected = ['Site UUID in source storage does not match the target storage.'];
       $this->assertEqual($expected, $error_log);
     }
   }
@@ -160,11 +160,11 @@ function testNew() {
     $this->assertIdentical($storage->exists($dynamic_name), FALSE, $dynamic_name . ' not found.');
 
     // Create new config entity.
-    $original_dynamic_data = array(
+    $original_dynamic_data = [
       'uuid' => '30df59bd-7b03-4cf7-bb35-d42fc49f0651',
       'langcode' => \Drupal::languageManager()->getDefaultLanguage()->getId(),
       'status' => TRUE,
-      'dependencies' => array(),
+      'dependencies' => [],
       'id' => 'new',
       'label' => 'New',
       'weight' => 0,
@@ -172,7 +172,7 @@ function testNew() {
       'size' => '',
       'size_value' => '',
       'protected_property' => '',
-    );
+    ];
     $sync->write($dynamic_name, $original_dynamic_data);
 
     $this->assertIdentical($sync->exists($dynamic_name), TRUE, $dynamic_name . ' found.');
@@ -211,23 +211,23 @@ function testSecondaryWritePrimaryFirst() {
     $sync = $this->container->get('config.storage.sync');
     $uuid = $this->container->get('uuid');
 
-    $values_primary = array(
+    $values_primary = [
       'id' => 'primary',
       'label' => 'Primary',
       'weight' => 0,
       'uuid' => $uuid->generate(),
-    );
+    ];
     $sync->write($name_primary, $values_primary);
-    $values_secondary = array(
+    $values_secondary = [
       'id' => 'secondary',
       'label' => 'Secondary Sync',
       'weight' => 0,
       'uuid' => $uuid->generate(),
       // Add a dependency on primary, to ensure that is synced first.
-      'dependencies' => array(
-        'config' => array($name_primary),
-      )
-    );
+      'dependencies' => [
+        'config' => [$name_primary],
+      ]
+    ];
     $sync->write($name_secondary, $values_secondary);
 
     // Import.
@@ -245,7 +245,7 @@ function testSecondaryWritePrimaryFirst() {
 
     $logs = $this->configImporter->getErrors();
     $this->assertEqual(count($logs), 1);
-    $this->assertEqual($logs[0], SafeMarkup::format('Deleted and replaced configuration entity "@name"', array('@name' => $name_secondary)));
+    $this->assertEqual($logs[0], SafeMarkup::format('Deleted and replaced configuration entity "@name"', ['@name' => $name_secondary]));
   }
 
   /**
@@ -257,23 +257,23 @@ function testSecondaryWriteSecondaryFirst() {
     $sync = $this->container->get('config.storage.sync');
     $uuid = $this->container->get('uuid');
 
-    $values_primary = array(
+    $values_primary = [
       'id' => 'primary',
       'label' => 'Primary',
       'weight' => 0,
       'uuid' => $uuid->generate(),
       // Add a dependency on secondary, so that is synced first.
-      'dependencies' => array(
-        'config' => array($name_secondary),
-      )
-    );
+      'dependencies' => [
+        'config' => [$name_secondary],
+      ]
+    ];
     $sync->write($name_primary, $values_primary);
-    $values_secondary = array(
+    $values_secondary = [
       'id' => 'secondary',
       'label' => 'Secondary Sync',
       'weight' => 0,
       'uuid' => $uuid->generate(),
-    );
+    ];
     $sync->write($name_secondary, $values_secondary);
 
     // Import.
@@ -305,52 +305,52 @@ function testSecondaryUpdateDeletedDeleterFirst() {
     $sync = $this->container->get('config.storage.sync');
     $uuid = $this->container->get('uuid');
 
-    $values_deleter = array(
+    $values_deleter = [
       'id' => 'deleter',
       'label' => 'Deleter',
       'weight' => 0,
       'uuid' => $uuid->generate(),
-    );
+    ];
     $storage->write($name_deleter, $values_deleter);
     $values_deleter['label'] = 'Updated Deleter';
     $sync->write($name_deleter, $values_deleter);
-    $values_deletee = array(
+    $values_deletee = [
       'id' => 'deletee',
       'label' => 'Deletee',
       'weight' => 0,
       'uuid' => $uuid->generate(),
       // Add a dependency on deleter, to make sure that is synced first.
-      'dependencies' => array(
-        'config' => array($name_deleter),
-      )
-    );
+      'dependencies' => [
+        'config' => [$name_deleter],
+      ]
+    ];
     $storage->write($name_deletee, $values_deletee);
     $values_deletee['label'] = 'Updated Deletee';
     $sync->write($name_deletee, $values_deletee);
 
     // Ensure that import will continue after the error.
-    $values_other = array(
+    $values_other = [
       'id' => 'other',
       'label' => 'Other',
       'weight' => 0,
       'uuid' => $uuid->generate(),
       // Add a dependency on deleter, to make sure that is synced first. This
       // will also be synced after the deletee due to alphabetical ordering.
-      'dependencies' => array(
-        'config' => array($name_deleter),
-      )
-    );
+      'dependencies' => [
+        'config' => [$name_deleter],
+      ]
+    ];
     $storage->write($name_other, $values_other);
     $values_other['label'] = 'Updated other';
     $sync->write($name_other, $values_other);
 
     // Check update changelist order.
     $updates = $this->configImporter->reset()->getStorageComparer()->getChangelist('update');
-    $expected = array(
+    $expected = [
       $name_deleter,
       $name_deletee,
       $name_other,
-    );
+    ];
     $this->assertIdentical($expected, $updates);
 
     // Import.
@@ -373,7 +373,7 @@ function testSecondaryUpdateDeletedDeleterFirst() {
 
     $logs = $this->configImporter->getErrors();
     $this->assertEqual(count($logs), 1);
-    $this->assertEqual($logs[0], SafeMarkup::format('Update target "@name" is missing.', array('@name' => $name_deletee)));
+    $this->assertEqual($logs[0], SafeMarkup::format('Update target "@name" is missing.', ['@name' => $name_deletee]));
   }
 
   /**
@@ -390,25 +390,25 @@ function testSecondaryUpdateDeletedDeleteeFirst() {
     $sync = $this->container->get('config.storage.sync');
     $uuid = $this->container->get('uuid');
 
-    $values_deleter = array(
+    $values_deleter = [
       'id' => 'deleter',
       'label' => 'Deleter',
       'weight' => 0,
       'uuid' => $uuid->generate(),
       // Add a dependency on deletee, to make sure that is synced first.
-      'dependencies' => array(
-        'config' => array($name_deletee),
-      ),
-    );
+      'dependencies' => [
+        'config' => [$name_deletee],
+      ],
+    ];
     $storage->write($name_deleter, $values_deleter);
     $values_deleter['label'] = 'Updated Deleter';
     $sync->write($name_deleter, $values_deleter);
-    $values_deletee = array(
+    $values_deletee = [
       'id' => 'deletee',
       'label' => 'Deletee',
       'weight' => 0,
       'uuid' => $uuid->generate(),
-    );
+    ];
     $storage->write($name_deletee, $values_deletee);
     $values_deletee['label'] = 'Updated Deletee';
     $sync->write($name_deletee, $values_deletee);
@@ -436,23 +436,23 @@ function testSecondaryDeletedDeleteeSecond() {
 
     $uuid = $this->container->get('uuid');
 
-    $values_deleter = array(
+    $values_deleter = [
       'id' => 'deleter',
       'label' => 'Deleter',
       'weight' => 0,
       'uuid' => $uuid->generate(),
       // Add a dependency on deletee, to make sure this delete is synced first.
-      'dependencies' => array(
-        'config' => array($name_deletee),
-      ),
-    );
+      'dependencies' => [
+        'config' => [$name_deletee],
+      ],
+    ];
     $storage->write($name_deleter, $values_deleter);
-    $values_deletee = array(
+    $values_deletee = [
       'id' => 'deletee',
       'label' => 'Deletee',
       'weight' => 0,
       'uuid' => $uuid->generate(),
-    );
+    ];
     $storage->write($name_deletee, $values_deletee);
 
     // Import.
@@ -483,9 +483,9 @@ function testUpdated() {
 
     // Replace the file content of the existing configuration objects in the
     // sync directory.
-    $original_name_data = array(
+    $original_name_data = [
       'foo' => 'beer',
-    );
+    ];
     $sync->write($name, $original_name_data);
     $original_dynamic_data = $storage->read($dynamic_name);
     $original_dynamic_data['label'] = 'Updated';
@@ -532,7 +532,7 @@ function testIsInstallable() {
     $config_name = 'config_test.dynamic.isinstallable';
     $this->assertFalse($this->container->get('config.storage')->exists($config_name));
     \Drupal::state()->set('config_test.isinstallable', TRUE);
-    $this->installConfig(array('config_test'));
+    $this->installConfig(['config_test']);
     $this->assertTrue($this->container->get('config.storage')->exists($config_name));
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigInstallTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigInstallTest.php
index dcd66a32a0ed85fff49013209c996a271d702141..953ff24b85d1c295410e2209c7c1151dc217bdf1 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigInstallTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigInstallTest.php
@@ -49,7 +49,7 @@ function testModuleInstallation() {
     $this->assertFalse(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.someschema'), 'Configuration schema for config_schema_test.someschema does not exist.');
 
     // Install the test module.
-    $this->installModules(array('config_test'));
+    $this->installModules(['config_test']);
 
     // Verify that default module config exists.
     \Drupal::configFactory()->reset($default_config);
@@ -69,14 +69,14 @@ function testModuleInstallation() {
     $this->assertFalse(isset($GLOBALS['hook_config_test']['delete']));
 
     // Install the schema test module.
-    $this->enableModules(array('config_schema_test'));
-    $this->installConfig(array('config_schema_test'));
+    $this->enableModules(['config_schema_test']);
+    $this->installConfig(['config_schema_test']);
 
     // After module installation the new schema should exist.
     $this->assertTrue(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.someschema'), 'Configuration schema for config_schema_test.someschema exists.');
 
     // Test that uninstalling configuration removes configuration schema.
-    $this->config('core.extension')->set('module', array())->save();
+    $this->config('core.extension')->set('module', [])->save();
     \Drupal::service('config.manager')->uninstall('module', 'config_test');
     $this->assertFalse(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.someschema'), 'Configuration schema for config_schema_test.someschema does not exist.');
   }
@@ -86,28 +86,28 @@ function testModuleInstallation() {
    */
   public function testCollectionInstallationNoCollections() {
     // Install the test module.
-    $this->enableModules(array('config_collection_install_test'));
-    $this->installConfig(array('config_collection_install_test'));
+    $this->enableModules(['config_collection_install_test']);
+    $this->installConfig(['config_collection_install_test']);
     /** @var \Drupal\Core\Config\StorageInterface $active_storage */
     $active_storage = \Drupal::service('config.storage');
-    $this->assertEqual(array(), $active_storage->getAllCollectionNames());
+    $this->assertEqual([], $active_storage->getAllCollectionNames());
   }
 
   /**
    * Tests config objects in collections are installed as expected.
    */
   public function testCollectionInstallationCollections() {
-    $collections = array(
+    $collections = [
       'another_collection',
       'collection.test1',
       'collection.test2',
-    );
+    ];
     // Set the event listener to return three possible collections.
     // @see \Drupal\config_collection_install_test\EventSubscriber
     \Drupal::state()->set('config_collection_install_test.collection_names', $collections);
     // Install the test module.
-    $this->enableModules(array('config_collection_install_test'));
-    $this->installConfig(array('config_collection_install_test'));
+    $this->enableModules(['config_collection_install_test']);
+    $this->installConfig(['config_collection_install_test']);
     /** @var \Drupal\Core\Config\StorageInterface $active_storage */
     $active_storage = \Drupal::service('config.storage');
     $this->assertEqual($collections, $active_storage->getAllCollectionNames());
@@ -140,20 +140,20 @@ public function testCollectionInstallationCollections() {
     // is not enabled.
     $this->assertEqual($collections, $active_storage->getAllCollectionNames());
     // Enable the 'config_test' module and try again.
-    $this->enableModules(array('config_test'));
+    $this->enableModules(['config_test']);
     \Drupal::service('config.installer')->installCollectionDefaultConfig('entity');
     $collections[] = 'entity';
     $this->assertEqual($collections, $active_storage->getAllCollectionNames());
     $collection_storage = $active_storage->createCollection('entity');
     $data = $collection_storage->read('config_test.dynamic.dotted.default');
-    $this->assertIdentical(array('label' => 'entity'), $data);
+    $this->assertIdentical(['label' => 'entity'], $data);
 
     // Test that the config manager uninstalls configuration from collections
     // as expected.
     \Drupal::service('config.manager')->uninstall('module', 'config_collection_install_test');
-    $this->assertEqual(array('entity'), $active_storage->getAllCollectionNames());
+    $this->assertEqual(['entity'], $active_storage->getAllCollectionNames());
     \Drupal::service('config.manager')->uninstall('module', 'config_test');
-    $this->assertEqual(array(), $active_storage->getAllCollectionNames());
+    $this->assertEqual([], $active_storage->getAllCollectionNames());
   }
 
   /**
@@ -165,12 +165,12 @@ public function testCollectionInstallationCollections() {
    * using simple configuration.
    */
   public function testCollectionInstallationCollectionConfigEntity() {
-    $collections = array(
+    $collections = [
       'entity',
-    );
+    ];
     \Drupal::state()->set('config_collection_install_test.collection_names', $collections);
     // Install the test module.
-    $this->installModules(array('config_test', 'config_collection_install_test'));
+    $this->installModules(['config_test', 'config_collection_install_test']);
     /** @var \Drupal\Core\Config\StorageInterface $active_storage */
     $active_storage = \Drupal::service('config.storage');
     $this->assertEqual($collections, $active_storage->getAllCollectionNames());
@@ -185,7 +185,7 @@ public function testCollectionInstallationCollectionConfigEntity() {
     $data = $active_storage->read($name);
     $this->assertTrue(isset($data['uuid']));
     $data = $collection_storage->read($name);
-    $this->assertIdentical(array('label' => 'entity'), $data);
+    $this->assertIdentical(['label' => 'entity'], $data);
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigLanguageOverrideTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigLanguageOverrideTest.php
index 994406c2a2dc225826770c9840a59f1c05e3d75b..6c6fa906222fa438a03813421ee985f1a8d7ce15 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigLanguageOverrideTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigLanguageOverrideTest.php
@@ -17,14 +17,14 @@ class ConfigLanguageOverrideTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'language', 'config_test', 'system', 'field');
+  public static $modules = ['user', 'language', 'config_test', 'system', 'field'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('config_test'));
+    $this->installConfig(['config_test']);
   }
 
   /**
@@ -68,40 +68,40 @@ function testConfigLanguageOverride() {
     // Test how overrides react to base configuration changes. Set up some base
     // values.
     \Drupal::configFactory()->getEditable('config_test.foo')
-      ->set('value', array('key' => 'original'))
+      ->set('value', ['key' => 'original'])
       ->set('label', 'Original')
       ->save();
     \Drupal::languageManager()
       ->getLanguageConfigOverride('de', 'config_test.foo')
-      ->set('value', array('key' => 'override'))
+      ->set('value', ['key' => 'override'])
       ->set('label', 'Override')
       ->save();
     \Drupal::languageManager()
       ->getLanguageConfigOverride('fr', 'config_test.foo')
-      ->set('value', array('key' => 'override'))
+      ->set('value', ['key' => 'override'])
       ->save();
     \Drupal::configFactory()->clearStaticCache();
     $config = \Drupal::config('config_test.foo');
-    $this->assertIdentical($config->get('value'), array('key' => 'override'));
+    $this->assertIdentical($config->get('value'), ['key' => 'override']);
 
     // Ensure renaming the config will rename the override.
     \Drupal::languageManager()->setConfigOverrideLanguage(\Drupal::languageManager()->getLanguage('en'));
     \Drupal::configFactory()->rename('config_test.foo', 'config_test.bar');
     $config = \Drupal::config('config_test.bar');
-    $this->assertEqual($config->get('value'), array('key' => 'original'));
+    $this->assertEqual($config->get('value'), ['key' => 'original']);
     $override = \Drupal::languageManager()->getLanguageConfigOverride('de', 'config_test.foo');
     $this->assertTrue($override->isNew());
     $this->assertEqual($override->get('value'), NULL);
     $override = \Drupal::languageManager()->getLanguageConfigOverride('de', 'config_test.bar');
     $this->assertFalse($override->isNew());
-    $this->assertEqual($override->get('value'), array('key' => 'override'));
+    $this->assertEqual($override->get('value'), ['key' => 'override']);
     $override = \Drupal::languageManager()->getLanguageConfigOverride('fr', 'config_test.bar');
     $this->assertFalse($override->isNew());
-    $this->assertEqual($override->get('value'), array('key' => 'override'));
+    $this->assertEqual($override->get('value'), ['key' => 'override']);
 
     // Ensure changing data in the config will update the overrides.
     $config = \Drupal::configFactory()->getEditable('config_test.bar')->clear('value.key')->save();
-    $this->assertEqual($config->get('value'), array());
+    $this->assertEqual($config->get('value'), []);
     $override = \Drupal::languageManager()->getLanguageConfigOverride('de', 'config_test.bar');
     $this->assertFalse($override->isNew());
     $this->assertEqual($override->get('value'), NULL);
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigModuleOverridesTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigModuleOverridesTest.php
index 1310cb32fcf01a93d7968fb8ac6dfc5130d7bebd..a94123d4cb98b6e64a51b0da8c324a9989ce5033 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigModuleOverridesTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigModuleOverridesTest.php
@@ -16,7 +16,7 @@ class ConfigModuleOverridesTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'config', 'config_override_test');
+  public static $modules = ['system', 'config', 'config_override_test'];
 
   public function testSimpleModuleOverrides() {
     $GLOBALS['config_test_run_module_overrides'] = TRUE;
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigOverrideTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigOverrideTest.php
index 914adcf104f7d7ec9a6a2e188931831ed0705747..157853bc937a1e4b1bfeabbf25383c00a6bf964d 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigOverrideTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigOverrideTest.php
@@ -16,7 +16,7 @@ class ConfigOverrideTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'config_test');
+  public static $modules = ['system', 'config_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -27,11 +27,11 @@ protected function setUp() {
    * Tests configuration override.
    */
   function testConfOverride() {
-    $expected_original_data = array(
+    $expected_original_data = [
       'foo' => 'bar',
       'baz' => NULL,
       '404' => 'herp',
-    );
+    ];
 
     // Set globals before installing to prove that the installed file does not
     // contain these values.
@@ -40,7 +40,7 @@ function testConfOverride() {
     $overrides['config_test.system']['404'] = 'derp';
     $GLOBALS['config'] = $overrides;
 
-    $this->installConfig(array('config_test'));
+    $this->installConfig(['config_test']);
 
     // Verify that the original configuration data exists. Have to read storage
     // directly otherwise overrides will apply.
@@ -90,10 +90,10 @@ function testConfOverride() {
 
     // Write file to sync.
     $sync = $this->container->get('config.storage.sync');
-    $expected_new_data = array(
+    $expected_new_data = [
       'foo' => 'barbar',
       '404' => 'herpderp',
-    );
+    ];
     $sync->write('config_test.system', $expected_new_data);
 
     // Import changed data from sync to active.
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigOverridesPriorityTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigOverridesPriorityTest.php
index f18bf3c8743cf2566e0ef2c0a2720ee0e253ca1b..6c568b8417f79843f12f5738dded7b64ccf8774c 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigOverridesPriorityTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigOverridesPriorityTest.php
@@ -18,7 +18,7 @@ class ConfigOverridesPriorityTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'config', 'config_override_test', 'language');
+  public static $modules = ['system', 'config', 'config_override_test', 'language'];
 
   public function testOverridePriorities() {
     $GLOBALS['config_test_run_module_overrides'] = FALSE;
@@ -50,10 +50,10 @@ public function testOverridePriorities() {
     $this->assertEqual(50, $config_factory->get('system.site')->get('weight_select_max'));
 
     // Override using language.
-    $language = new Language(array(
+    $language = new Language([
       'name' => 'French',
       'id' => 'fr',
-    ));
+    ]);
     \Drupal::languageManager()->setConfigOverrideLanguage($language);
     \Drupal::languageManager()
       ->getLanguageConfigOverride($language->getId(), 'system.site')
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigSchemaTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigSchemaTest.php
index 8a39d64edc998ee66c2c83e29c77174ded929aac..5554fb2870af909e992f2ba627b44e4af9f77bdb 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigSchemaTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigSchemaTest.php
@@ -25,14 +25,14 @@ class ConfigSchemaTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'language', 'field', 'image', 'config_test', 'config_schema_test');
+  public static $modules = ['system', 'language', 'field', 'image', 'config_test', 'config_schema_test'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('system', 'image', 'config_schema_test'));
+    $this->installConfig(['system', 'image', 'config_schema_test']);
   }
 
   /**
@@ -42,7 +42,7 @@ function testSchemaMapping() {
     // Nonexistent configuration key will have Undefined as metadata.
     $this->assertIdentical(FALSE, \Drupal::service('config.typed')->hasConfigSchema('config_schema_test.no_such_key'));
     $definition = \Drupal::service('config.typed')->getDefinition('config_schema_test.no_such_key');
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Undefined';
     $expected['class'] = Undefined::class;
     $expected['type'] = 'undefined';
@@ -57,14 +57,14 @@ function testSchemaMapping() {
     // Configuration file with only some schema.
     $this->assertIdentical(TRUE, \Drupal::service('config.typed')->hasConfigSchema('config_schema_test.someschema'));
     $definition = \Drupal::service('config.typed')->getDefinition('config_schema_test.someschema');
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Schema test data';
     $expected['class'] = Mapping::class;
     $expected['mapping']['langcode']['type'] = 'string';
     $expected['mapping']['langcode']['label'] = 'Language code';
     $expected['mapping']['_core']['type'] = '_core_config_info';
-    $expected['mapping']['testitem'] = array('label' => 'Test item');
-    $expected['mapping']['testlist'] = array('label' => 'Test list');
+    $expected['mapping']['testitem'] = ['label' => 'Test item'];
+    $expected['mapping']['testlist'] = ['label' => 'Test list'];
     $expected['type'] = 'config_schema_test.someschema';
     $expected['definition_class'] = '\Drupal\Core\TypedData\MapDataDefinition';
     $this->assertEqual($definition, $expected, 'Retrieved the right metadata for configuration with only some schema.');
@@ -72,21 +72,21 @@ function testSchemaMapping() {
     // Check type detection on elements with undefined types.
     $config = \Drupal::service('config.typed')->get('config_schema_test.someschema');
     $definition = $config->get('testitem')->getDataDefinition()->toArray();
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Test item';
     $expected['class'] = Undefined::class;
     $expected['type'] = 'undefined';
     $expected['definition_class'] = '\Drupal\Core\TypedData\DataDefinition';
     $this->assertEqual($definition, $expected, 'Automatic type detected for a scalar is undefined.');
     $definition = $config->get('testlist')->getDataDefinition()->toArray();
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Test list';
     $expected['class'] = Undefined::class;
     $expected['type'] = 'undefined';
     $expected['definition_class'] = '\Drupal\Core\TypedData\DataDefinition';
     $this->assertEqual($definition, $expected, 'Automatic type detected for a list is undefined.');
     $definition = $config->get('testnoschema')->getDataDefinition()->toArray();
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Undefined';
     $expected['class'] = Undefined::class;
     $expected['type'] = 'undefined';
@@ -95,17 +95,17 @@ function testSchemaMapping() {
 
     // Simple case, straight metadata.
     $definition = \Drupal::service('config.typed')->getDefinition('system.maintenance');
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Maintenance mode';
     $expected['class'] = Mapping::class;
-    $expected['mapping']['message'] = array(
+    $expected['mapping']['message'] = [
       'label' => 'Message to display when in maintenance mode',
       'type' => 'text',
-    );
-    $expected['mapping']['langcode'] = array(
+    ];
+    $expected['mapping']['langcode'] = [
       'label' => 'Language code',
       'type' => 'string',
-    );
+    ];
     $expected['mapping']['_core']['type'] = '_core_config_info';
     $expected['type'] = 'system.maintenance';
     $expected['definition_class'] = '\Drupal\Core\TypedData\MapDataDefinition';
@@ -113,38 +113,38 @@ function testSchemaMapping() {
 
     // Mixed schema with ignore elements.
     $definition = \Drupal::service('config.typed')->getDefinition('config_schema_test.ignore');
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Ignore test';
     $expected['class'] = Mapping::class;
     $expected['definition_class'] = '\Drupal\Core\TypedData\MapDataDefinition';
-    $expected['mapping']['langcode'] = array(
+    $expected['mapping']['langcode'] = [
       'type' => 'string',
       'label' => 'Language code',
-    );
+    ];
     $expected['mapping']['_core']['type'] = '_core_config_info';
-    $expected['mapping']['label'] = array(
+    $expected['mapping']['label'] = [
       'label' => 'Label',
       'type' => 'label',
-    );
-    $expected['mapping']['irrelevant'] = array(
+    ];
+    $expected['mapping']['irrelevant'] = [
       'label' => 'Irrelevant',
       'type' => 'ignore',
-    );
-    $expected['mapping']['indescribable'] = array(
+    ];
+    $expected['mapping']['indescribable'] = [
       'label' => 'Indescribable',
       'type' => 'ignore',
-    );
-    $expected['mapping']['weight'] = array(
+    ];
+    $expected['mapping']['weight'] = [
       'label' => 'Weight',
       'type' => 'integer',
-    );
+    ];
     $expected['type'] = 'config_schema_test.ignore';
 
     $this->assertEqual($definition, $expected);
 
     // The ignore elements themselves.
     $definition = \Drupal::service('config.typed')->get('config_schema_test.ignore')->get('irrelevant')->getDataDefinition()->toArray();
-    $expected = array();
+    $expected = [];
     $expected['type'] = 'ignore';
     $expected['label'] = 'Irrelevant';
     $expected['class'] = Ignore::class;
@@ -156,7 +156,7 @@ function testSchemaMapping() {
 
     // More complex case, generic type. Metadata for image style.
     $definition = \Drupal::service('config.typed')->getDefinition('image.style.large');
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Image style';
     $expected['class'] = Mapping::class;
     $expected['definition_class'] = '\Drupal\Core\TypedData\MapDataDefinition';
@@ -189,7 +189,7 @@ function testSchemaMapping() {
     // More complex, type based on a complex one.
     $definition = \Drupal::service('config.typed')->getDefinition('image.effect.image_scale');
     // This should be the schema for image.effect.image_scale.
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Image scale';
     $expected['class'] = Mapping::class;
     $expected['definition_class'] = '\Drupal\Core\TypedData\MapDataDefinition';
@@ -215,7 +215,7 @@ function testSchemaMapping() {
     $a = \Drupal::config('config_test.dynamic.third_party');
     $test = \Drupal::service('config.typed')->get('config_test.dynamic.third_party')->get('third_party_settings.config_schema_test');
     $definition = $test->getDataDefinition()->toArray();
-    $expected = array();
+    $expected = [];
     $expected['type'] = 'config_test.dynamic.*.third_party.config_schema_test';
     $expected['label'] = 'Mapping';
     $expected['class'] = Mapping::class;
@@ -229,7 +229,7 @@ function testSchemaMapping() {
     // More complex, several level deep test.
     $definition = \Drupal::service('config.typed')->getDefinition('config_schema_test.someschema.somemodule.section_one.subsection');
     // This should be the schema of config_schema_test.someschema.somemodule.*.*.
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Schema multiple filesystem marker test';
     $expected['class'] = Mapping::class;
     $expected['mapping']['langcode']['type'] = 'string';
@@ -258,34 +258,34 @@ function testSchemaMappingWithParents() {
     // Test fetching parent one level up.
     $entry = $config_data->get('one_level');
     $definition = $entry->get('testitem')->getDataDefinition()->toArray();
-    $expected = array(
+    $expected = [
       'type' => 'config_schema_test.someschema.with_parents.key_1',
       'label' => 'Test item nested one level',
       'class' => StringData::class,
       'definition_class' => '\Drupal\Core\TypedData\DataDefinition',
-    );
+    ];
     $this->assertEqual($definition, $expected);
 
     // Test fetching parent two levels up.
     $entry = $config_data->get('two_levels');
     $definition = $entry->get('wrapper')->get('testitem')->getDataDefinition()->toArray();
-    $expected = array(
+    $expected = [
       'type' => 'config_schema_test.someschema.with_parents.key_2',
       'label' => 'Test item nested two levels',
       'class' => StringData::class,
       'definition_class' => '\Drupal\Core\TypedData\DataDefinition',
-    );
+    ];
     $this->assertEqual($definition, $expected);
 
     // Test fetching parent three levels up.
     $entry = $config_data->get('three_levels');
     $definition = $entry->get('wrapper_1')->get('wrapper_2')->get('testitem')->getDataDefinition()->toArray();
-    $expected = array(
+    $expected = [
       'type' => 'config_schema_test.someschema.with_parents.key_3',
       'label' => 'Test item nested three levels',
       'class' => StringData::class,
       'definition_class' => '\Drupal\Core\TypedData\DataDefinition',
-    );
+    ];
     $this->assertEqual($definition, $expected);
   }
 
@@ -328,7 +328,7 @@ function testSchemaData() {
    * Test configuration value data type enforcement using schemas.
    */
   public function testConfigSaveWithSchema() {
-    $untyped_values = array(
+    $untyped_values = [
       'string' => 1,
       'empty_string' => '',
       'null_string' => NULL,
@@ -337,22 +337,22 @@ public function testConfigSaveWithSchema() {
       'boolean' => 1,
       // If the config schema doesn't have a type it shouldn't be casted.
       'no_type' => 1,
-      'mapping' => array(
+      'mapping' => [
         'string' => 1
-      ),
+      ],
       'float' => '3.14',
       'null_float' => '',
-      'sequence' => array (1, 0, 1),
-      'sequence_bc' => array(1, 0, 1),
+      'sequence' =>  [1, 0, 1],
+      'sequence_bc' => [1, 0, 1],
       // Not in schema and therefore should be left untouched.
       'not_present_in_schema' => TRUE,
       // Test a custom type.
       'config_schema_test_integer' => '1',
       'config_schema_test_integer_empty_string' => '',
-    );
+    ];
     $untyped_to_typed = $untyped_values;
 
-    $typed_values = array(
+    $typed_values = [
       'string' => '1',
       'empty_string' => '',
       'null_string' => NULL,
@@ -360,17 +360,17 @@ public function testConfigSaveWithSchema() {
       'null_integer' => NULL,
       'boolean' => TRUE,
       'no_type' => 1,
-      'mapping' => array(
+      'mapping' => [
         'string' => '1'
-      ),
+      ],
       'float' => 3.14,
       'null_float' => NULL,
-      'sequence' => array (TRUE, FALSE, TRUE),
-      'sequence_bc' => array(TRUE, FALSE, TRUE),
+      'sequence' =>  [TRUE, FALSE, TRUE],
+      'sequence_bc' => [TRUE, FALSE, TRUE],
       'not_present_in_schema' => TRUE,
       'config_schema_test_integer' => 1,
       'config_schema_test_integer_empty_string' => NULL,
-    );
+    ];
 
     // Save config which has a schema that enforces types.
     $this->config('config_schema_test.schema_data_types')
@@ -401,7 +401,7 @@ public function testConfigSaveWithSchema() {
   function testSchemaFallback() {
     $definition = \Drupal::service('config.typed')->getDefinition('config_schema_test.wildcard_fallback.something');
     // This should be the schema of config_schema_test.wildcard_fallback.*.
-    $expected = array();
+    $expected = [];
     $expected['label'] = 'Schema wildcard fallback test';
     $expected['class'] = Mapping::class;
     $expected['definition_class'] = '\Drupal\Core\TypedData\MapDataDefinition';
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigSnapshotTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigSnapshotTest.php
index efac2dd12a2c481511eba8513a45be3b56904127..2261168af679076a055f2cc102109a205a25f6cf 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigSnapshotTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigSnapshotTest.php
@@ -17,7 +17,7 @@ class ConfigSnapshotTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test', 'system');
+  public static $modules = ['config_test', 'system'];
 
   /**
    * {@inheritdoc}
@@ -50,7 +50,7 @@ function testSnapshot() {
     $this->assertFalse($active_snapshot_comparer->createChangelist()->hasChanges());
 
     // Install the default config.
-    $this->installConfig(array('config_test'));
+    $this->installConfig(['config_test']);
     // Although we have imported config this has not affected the snapshot.
     $this->assertTrue($active_snapshot_comparer->reset()->hasChanges());
 
diff --git a/core/tests/Drupal/KernelTests/Core/Config/DefaultConfigTest.php b/core/tests/Drupal/KernelTests/Core/Config/DefaultConfigTest.php
index 4b14805175b15a7a26cadadbaa0e59dfcda4ea2c..f06806cad6fd398345e8ce904e20b129dfe2b75e 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/DefaultConfigTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/DefaultConfigTest.php
@@ -23,7 +23,7 @@ class DefaultConfigTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'config_test');
+  public static $modules = ['system', 'config_test'];
 
   /**
    * Themes which provide default configuration and need enabling.
diff --git a/core/tests/Drupal/KernelTests/Core/Config/SchemaCheckTraitTest.php b/core/tests/Drupal/KernelTests/Core/Config/SchemaCheckTraitTest.php
index 15aecaaaf2d4300ac382d665b32c80c91f1c7686..68a8962e56996c2273c28ad1635a5e83a925a972 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/SchemaCheckTraitTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/SchemaCheckTraitTest.php
@@ -27,14 +27,14 @@ class SchemaCheckTraitTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test', 'config_schema_test');
+  public static $modules = ['config_test', 'config_schema_test'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('config_test', 'config_schema_test'));
+    $this->installConfig(['config_test', 'config_schema_test']);
     $this->typedConfig = \Drupal::service('config.typed');
   }
 
@@ -53,14 +53,14 @@ public function testTrait() {
 
     // Add a new key, a new array and overwrite boolean with array to test the
     // error messages.
-    $config_data = array('new_key' => 'new_value', 'new_array' => array()) + $config_data;
-    $config_data['boolean'] = array();
+    $config_data = ['new_key' => 'new_value', 'new_array' => []] + $config_data;
+    $config_data['boolean'] = [];
     $ret = $this->checkConfigSchema($this->typedConfig, 'config_test.types', $config_data);
-    $expected = array(
+    $expected = [
       'config_test.types:new_key' => 'missing schema',
       'config_test.types:new_array' => 'missing schema',
       'config_test.types:boolean' => 'non-scalar value but not defined as an array (such as mapping or sequence)',
-    );
+    ];
     $this->assertEqual($ret, $expected);
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Config/SchemaConfigListenerTest.php b/core/tests/Drupal/KernelTests/Core/Config/SchemaConfigListenerTest.php
index f07802127799b0dbcdb1c1d6fbb25fa09d781660..2674a3c6df85ecca8892e63f71d363ed58a90a59 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/SchemaConfigListenerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/SchemaConfigListenerTest.php
@@ -17,7 +17,7 @@ class SchemaConfigListenerTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * {@inheritdoc}
diff --git a/core/tests/Drupal/KernelTests/Core/Config/Storage/CachedStorageTest.php b/core/tests/Drupal/KernelTests/Core/Config/Storage/CachedStorageTest.php
index 163cca711507da2304c318b56e0857365e554640..236647810cd909f5340baab075f4f5f62845749b 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/Storage/CachedStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/Storage/CachedStorageTest.php
@@ -37,7 +37,7 @@ protected function setUp() {
     $this->storage = new CachedStorage($this->fileStorage, \Drupal::service('cache.config'));
     $this->cache = \Drupal::service('cache_factory')->get('config');
     // ::listAll() verifications require other configuration data to exist.
-    $this->storage->write('system.performance', array());
+    $this->storage->write('system.performance', []);
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Config/Storage/ConfigStorageTestBase.php b/core/tests/Drupal/KernelTests/Core/Config/Storage/ConfigStorageTestBase.php
index 1863dab2fcf08dd1dc53f4f4f35dcb544abbc91f..079ac04a62b0274340feed8f35549dca4efd3c16 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/Storage/ConfigStorageTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/Storage/ConfigStorageTestBase.php
@@ -44,7 +44,7 @@ function testCRUD() {
     $this->assertIdentical($data, FALSE);
 
     // Writing data returns TRUE and the data has been written.
-    $data = array('foo' => 'bar');
+    $data = ['foo' => 'bar'];
     $result = $this->storage->write($name, $data);
     $this->assertIdentical($result, TRUE);
 
@@ -86,11 +86,11 @@ function testCRUD() {
 
     // Deleting all names with prefix deletes the appropriate data and returns
     // TRUE.
-    $files = array(
+    $files = [
       'config_test.test.biff',
       'config_test.test.bang',
       'config_test.test.pow',
-    );
+    ];
     foreach ($files as $name) {
       $this->storage->write($name, $data);
     }
@@ -98,7 +98,7 @@ function testCRUD() {
     $result = $this->storage->deleteAll('config_test.');
     $names = $this->storage->listAll('config_test.');
     $this->assertIdentical($result, TRUE);
-    $this->assertIdentical($names, array());
+    $this->assertIdentical($names, []);
 
     // Test renaming an object that does not exist throws an exception.
     try {
@@ -127,7 +127,7 @@ public function testInvalidStorage() {
 
     // Write something to the valid storage to prove that the storages do not
     // pollute one another.
-    $data = array('foo' => 'bar');
+    $data = ['foo' => 'bar'];
     $result = $this->storage->write($name, $data);
     $this->assertIdentical($result, TRUE);
 
@@ -150,11 +150,11 @@ public function testInvalidStorage() {
 
     // Listing on a non-existing storage bin returns an empty array.
     $result = $this->invalidStorage->listAll();
-    $this->assertIdentical($result, array());
+    $this->assertIdentical($result, []);
     // Writing to a non-existing storage bin creates the bin.
-    $this->invalidStorage->write($name, array('foo' => 'bar'));
+    $this->invalidStorage->write($name, ['foo' => 'bar']);
     $result = $this->invalidStorage->read($name);
-    $this->assertIdentical($result, array('foo' => 'bar'));
+    $this->assertIdentical($result, ['foo' => 'bar']);
   }
 
   /**
@@ -162,8 +162,8 @@ public function testInvalidStorage() {
    */
   function testDataTypes() {
     $name = 'config_test.types';
-    $data = array(
-      'array' => array(),
+    $data = [
+      'array' => [],
       'boolean' => TRUE,
       'exp' => 1.2e+34,
       'float' => 3.14159,
@@ -172,7 +172,7 @@ function testDataTypes() {
       'octal' => 0775,
       'string' => 'string',
       'string_int' => '1',
-    );
+    ];
 
     $result = $this->storage->write($name, $data);
     $this->assertIdentical($result, TRUE);
@@ -186,7 +186,7 @@ function testDataTypes() {
    */
   public function testCollection() {
     $name = 'config_test.storage';
-    $data = array('foo' => 'bar');
+    $data = ['foo' => 'bar'];
     $result = $this->storage->write($name, $data);
     $this->assertIdentical($result, TRUE);
     $this->assertIdentical($data, $this->storage->read($name));
@@ -194,13 +194,13 @@ public function testCollection() {
     // Create configuration in a new collection.
     $new_storage = $this->storage->createCollection('collection.sub.new');
     $this->assertFalse($new_storage->exists($name));
-    $this->assertEqual(array(), $new_storage->listAll());
+    $this->assertEqual([], $new_storage->listAll());
     $new_storage->write($name, $data);
     $this->assertIdentical($result, TRUE);
     $this->assertIdentical($data, $new_storage->read($name));
-    $this->assertEqual(array($name), $new_storage->listAll());
+    $this->assertEqual([$name], $new_storage->listAll());
     $this->assertTrue($new_storage->exists($name));
-    $new_data = array('foo' => 'baz');
+    $new_data = ['foo' => 'baz'];
     $new_storage->write($name, $new_data);
     $this->assertIdentical($result, TRUE);
     $this->assertIdentical($new_data, $new_storage->read($name));
@@ -208,11 +208,11 @@ public function testCollection() {
     // Create configuration in another collection.
     $another_storage = $this->storage->createCollection('collection.sub.another');
     $this->assertFalse($another_storage->exists($name));
-    $this->assertEqual(array(), $another_storage->listAll());
+    $this->assertEqual([], $another_storage->listAll());
     $another_storage->write($name, $new_data);
     $this->assertIdentical($result, TRUE);
     $this->assertIdentical($new_data, $another_storage->read($name));
-    $this->assertEqual(array($name), $another_storage->listAll());
+    $this->assertEqual([$name], $another_storage->listAll());
     $this->assertTrue($another_storage->exists($name));
 
     // Create configuration in yet another collection.
@@ -226,33 +226,33 @@ public function testCollection() {
     $this->assertIdentical($data, $this->storage->read($name));
 
     // Check that the getAllCollectionNames() method works.
-    $this->assertIdentical(array('alternate', 'collection.sub.another', 'collection.sub.new'), $this->storage->getAllCollectionNames());
+    $this->assertIdentical(['alternate', 'collection.sub.another', 'collection.sub.new'], $this->storage->getAllCollectionNames());
 
     // Check that the collections are removed when they are empty.
     $alt_storage->delete($name);
-    $this->assertIdentical(array('collection.sub.another', 'collection.sub.new'), $this->storage->getAllCollectionNames());
+    $this->assertIdentical(['collection.sub.another', 'collection.sub.new'], $this->storage->getAllCollectionNames());
 
     // Create configuration in collection called 'collection'. This ensures that
     // FileStorage's collection storage works regardless of its use of
     // subdirectories.
     $parent_storage = $this->storage->createCollection('collection');
     $this->assertFalse($parent_storage->exists($name));
-    $this->assertEqual(array(), $parent_storage->listAll());
+    $this->assertEqual([], $parent_storage->listAll());
     $parent_storage->write($name, $new_data);
     $this->assertIdentical($result, TRUE);
     $this->assertIdentical($new_data, $parent_storage->read($name));
-    $this->assertEqual(array($name), $parent_storage->listAll());
+    $this->assertEqual([$name], $parent_storage->listAll());
     $this->assertTrue($parent_storage->exists($name));
-    $this->assertIdentical(array('collection', 'collection.sub.another', 'collection.sub.new'), $this->storage->getAllCollectionNames());
+    $this->assertIdentical(['collection', 'collection.sub.another', 'collection.sub.new'], $this->storage->getAllCollectionNames());
     $parent_storage->deleteAll();
-    $this->assertIdentical(array('collection.sub.another', 'collection.sub.new'), $this->storage->getAllCollectionNames());
+    $this->assertIdentical(['collection.sub.another', 'collection.sub.new'], $this->storage->getAllCollectionNames());
 
     // Check that the having an empty collection-less storage does not break
     // anything. Before deleting check that the previous delete did not affect
     // data in another collection.
     $this->assertIdentical($data, $this->storage->read($name));
     $this->storage->delete($name);
-    $this->assertIdentical(array('collection.sub.another', 'collection.sub.new'), $this->storage->getAllCollectionNames());
+    $this->assertIdentical(['collection.sub.another', 'collection.sub.new'], $this->storage->getAllCollectionNames());
   }
 
   abstract protected function read($name);
diff --git a/core/tests/Drupal/KernelTests/Core/Config/Storage/DatabaseStorageTest.php b/core/tests/Drupal/KernelTests/Core/Config/Storage/DatabaseStorageTest.php
index 6f09a829d4a2635f4fbb64097628906dc7e004ad..0aecc72b8f9b7d6567a5499798a47e58e0cd1755 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/Storage/DatabaseStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/Storage/DatabaseStorageTest.php
@@ -21,20 +21,20 @@ protected function setUp() {
     $this->invalidStorage = new DatabaseStorage($this->container->get('database'), 'invalid');
 
     // ::listAll() verifications require other configuration data to exist.
-    $this->storage->write('system.performance', array());
+    $this->storage->write('system.performance', []);
   }
 
   protected function read($name) {
-    $data = db_query('SELECT data FROM {config} WHERE name = :name', array(':name' => $name))->fetchField();
+    $data = db_query('SELECT data FROM {config} WHERE name = :name', [':name' => $name])->fetchField();
     return unserialize($data);
   }
 
   protected function insert($name, $data) {
-    db_insert('config')->fields(array('name' => $name, 'data' => $data))->execute();
+    db_insert('config')->fields(['name' => $name, 'data' => $data])->execute();
   }
 
   protected function update($name, $data) {
-    db_update('config')->fields(array('data' => $data))->condition('name', $name)->execute();
+    db_update('config')->fields(['data' => $data])->condition('name', $name)->execute();
   }
 
   protected function delete($name) {
diff --git a/core/tests/Drupal/KernelTests/Core/Config/Storage/FileStorageTest.php b/core/tests/Drupal/KernelTests/Core/Config/Storage/FileStorageTest.php
index fa10a09741b1443e8a4682a17530ff9d28abfd47..23bd5ea62602fa3ed97d04d05819883ec519ee9b 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/Storage/FileStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/Storage/FileStorageTest.php
@@ -33,7 +33,7 @@ protected function setUp() {
 
     // FileStorage::listAll() requires other configuration data to exist.
     $this->storage->write('system.performance', $this->config('system.performance')->get());
-    $this->storage->write('core.extension', array('module' => array()));
+    $this->storage->write('core.extension', ['module' => []]);
   }
 
   protected function read($name) {
@@ -57,10 +57,10 @@ protected function delete($name) {
    * Tests the FileStorage::listAll method with a relative and absolute path.
    */
   public function testlistAll() {
-    $expected_files = array(
+    $expected_files = [
       'core.extension',
       'system.performance',
-    );
+    ];
 
     $config_files = $this->storage->listAll();
     $this->assertIdentical($config_files, $expected_files, 'Relative path, two config files found.');
diff --git a/core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php b/core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php
index 84b4f564c32659233988bdacbc71487bccc07680..44ce4958f37be93348fffe77ca5a0aa9767a2bf0 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php
@@ -19,8 +19,8 @@ protected function setUp() {
     parent::setUp();
     $this->storage = new StorageReplaceDataWrapper($this->container->get('config.storage'));
     // ::listAll() verifications require other configuration data to exist.
-    $this->storage->write('system.performance', array());
-    $this->storage->replaceData('system.performance', array('foo' => 'bar'));
+    $this->storage->write('system.performance', []);
+    $this->storage->replaceData('system.performance', ['foo' => 'bar']);
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Database/BasicSyntaxTest.php b/core/tests/Drupal/KernelTests/Core/Database/BasicSyntaxTest.php
index eaf50e50f2fa468824b2db8aaf61ee3218286fdd..c595e8f762568deba87f61369b6e72fa824362dc 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/BasicSyntaxTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/BasicSyntaxTest.php
@@ -16,13 +16,13 @@ class BasicSyntaxTest extends DatabaseTestBase {
    * Tests string concatenation.
    */
   function testConcatLiterals() {
-    $result = db_query('SELECT CONCAT(:a1, CONCAT(:a2, CONCAT(:a3, CONCAT(:a4, :a5))))', array(
+    $result = db_query('SELECT CONCAT(:a1, CONCAT(:a2, CONCAT(:a3, CONCAT(:a4, :a5))))', [
       ':a1' => 'This',
       ':a2' => ' ',
       ':a3' => 'is',
       ':a4' => ' a ',
       ':a5' => 'test.',
-    ));
+    ]);
     $this->assertIdentical($result->fetchField(), 'This is a test.', 'Basic CONCAT works.');
   }
 
@@ -30,12 +30,12 @@ function testConcatLiterals() {
    * Tests string concatenation with field values.
    */
   function testConcatFields() {
-    $result = db_query('SELECT CONCAT(:a1, CONCAT(name, CONCAT(:a2, CONCAT(age, :a3)))) FROM {test} WHERE age = :age', array(
+    $result = db_query('SELECT CONCAT(:a1, CONCAT(name, CONCAT(:a2, CONCAT(age, :a3)))) FROM {test} WHERE age = :age', [
       ':a1' => 'The age of ',
       ':a2' => ' is ',
       ':a3' => '.',
       ':age' => 25,
-    ));
+    ]);
     $this->assertIdentical($result->fetchField(), 'The age of John is 25.', 'Field CONCAT works.');
   }
 
@@ -43,12 +43,12 @@ function testConcatFields() {
    * Tests string concatenation with separator.
    */
   function testConcatWsLiterals() {
-    $result = db_query("SELECT CONCAT_WS(', ', :a1, NULL, :a2, :a3, :a4)", array(
+    $result = db_query("SELECT CONCAT_WS(', ', :a1, NULL, :a2, :a3, :a4)", [
       ':a1' => 'Hello',
       ':a2' => NULL,
       ':a3' => '',
       ':a4' => 'world.',
-    ));
+    ]);
     $this->assertIdentical($result->fetchField(), 'Hello, , world.');
   }
 
@@ -56,11 +56,11 @@ function testConcatWsLiterals() {
    * Tests string concatenation with separator, with field values.
    */
   function testConcatWsFields() {
-    $result = db_query("SELECT CONCAT_WS('-', :a1, name, :a2, age) FROM {test} WHERE age = :age", array(
+    $result = db_query("SELECT CONCAT_WS('-', :a1, name, :a2, age) FROM {test} WHERE age = :age", [
       ':a1' => 'name',
       ':a2' => 'age',
       ':age' => 25,
-    ));
+    ]);
     $this->assertIdentical($result->fetchField(), 'name-John-age-25');
   }
 
@@ -69,9 +69,9 @@ function testConcatWsFields() {
    */
   function testLikeEscape() {
     db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'Ring_',
-      ))
+      ])
       ->execute();
 
     // Match both "Ringo" and "Ring_".
@@ -95,13 +95,13 @@ function testLikeEscape() {
    */
   function testLikeBackslash() {
     db_insert('test')
-      ->fields(array('name'))
-      ->values(array(
+      ->fields(['name'])
+      ->values([
         'name' => 'abcde\f',
-      ))
-      ->values(array(
+      ])
+      ->values([
         'name' => 'abc%\_',
-      ))
+      ])
       ->execute();
 
     // Match both rows using a LIKE expression with two wildcards and a verbatim
diff --git a/core/tests/Drupal/KernelTests/Core/Database/CaseSensitivityTest.php b/core/tests/Drupal/KernelTests/Core/Database/CaseSensitivityTest.php
index 35fdb4d912ec17753240ce99b03bd78b53f6b81f..24a18729e9f6f30d3ff82c70906ca04f773257dd 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/CaseSensitivityTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/CaseSensitivityTest.php
@@ -15,16 +15,16 @@ function testCaseSensitiveInsert() {
     $num_records_before = db_query('SELECT COUNT(*) FROM {test}')->fetchField();
 
     db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'john', // <- A record already exists with name 'John'.
         'age' => 2,
         'job' => 'Baby',
-      ))
+      ])
       ->execute();
 
     $num_records_after = db_query('SELECT COUNT(*) FROM {test}')->fetchField();
     $this->assertIdentical($num_records_before + 1, (int) $num_records_after, 'Record inserts correctly.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'john'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'john'])->fetchField();
     $this->assertIdentical($saved_age, '2', 'Can retrieve after inserting.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php b/core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php
index 0cc3627fb2888e4f88be6d24baae9640d20977f7..5a8444a18cca0e6eb666fbf0986ff4b81410eea9 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php
@@ -168,9 +168,9 @@ public function testPostgresqlReservedWords() {
     $stmt->execute();
     foreach ($stmt->fetchAllAssoc('word') as $word => $row) {
       $expected = '"' . $word . '"';
-      $this->assertIdentical($db->escapeTable($word), $expected, format_string('The reserved word %word was correctly escaped when used as a table name.', array('%word' => $word)));
-      $this->assertIdentical($db->escapeField($word), $expected, format_string('The reserved word %word was correctly escaped when used as a column name.', array('%word' => $word)));
-      $this->assertIdentical($db->escapeAlias($word), $expected, format_string('The reserved word %word was correctly escaped when used as an alias.', array('%word' => $word)));
+      $this->assertIdentical($db->escapeTable($word), $expected, format_string('The reserved word %word was correctly escaped when used as a table name.', ['%word' => $word]));
+      $this->assertIdentical($db->escapeField($word), $expected, format_string('The reserved word %word was correctly escaped when used as a column name.', ['%word' => $word]));
+      $this->assertIdentical($db->escapeAlias($word), $expected, format_string('The reserved word %word was correctly escaped when used as an alias.', ['%word' => $word]));
     }
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/ConnectionUnitTest.php b/core/tests/Drupal/KernelTests/Core/Database/ConnectionUnitTest.php
index e315f9651ddea3f37e80074a9d90654bfe24a1e0..cd5dcd4b7826e7a669b2101713ff545f90358742 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/ConnectionUnitTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/ConnectionUnitTest.php
@@ -75,7 +75,7 @@ protected function getConnectionID() {
    */
   protected function assertConnection($id) {
     $list = $this->monitor->query('SHOW PROCESSLIST')->fetchAllKeyed(0, 0);
-    return $this->assertTrue(isset($list[$id]), format_string('Connection ID @id found.', array('@id' => $id)));
+    return $this->assertTrue(isset($list[$id]), format_string('Connection ID @id found.', ['@id' => $id]));
   }
 
   /**
@@ -86,7 +86,7 @@ protected function assertConnection($id) {
    */
   protected function assertNoConnection($id) {
     $list = $this->monitor->query('SHOW PROCESSLIST')->fetchAllKeyed(0, 0);
-    return $this->assertFalse(isset($list[$id]), format_string('Connection ID @id not found.', array('@id' => $id)));
+    return $this->assertFalse(isset($list[$id]), format_string('Connection ID @id not found.', ['@id' => $id]));
   }
 
   /**
@@ -186,18 +186,18 @@ function testOpenSelectQueryClose() {
 
     // Create a table.
     $name = 'foo';
-    Database::getConnection($this->target, $this->key)->schema()->createTable($name, array(
-      'fields' => array(
-        'name' => array(
+    Database::getConnection($this->target, $this->key)->schema()->createTable($name, [
+      'fields' => [
+        'name' => [
           'type' => 'varchar',
           'length' => 255,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     // Execute a query.
     Database::getConnection($this->target, $this->key)->select('foo', 'f')
-      ->fields('f', array('name'))
+      ->fields('f', ['name'])
       ->execute()
       ->fetchAll();
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/DatabaseTestBase.php b/core/tests/Drupal/KernelTests/Core/Database/DatabaseTestBase.php
index f8c8c3dcaf7926b915b6f086a65d42dc073c5655..7781a9080b77e22e6d1e7cfc1c9c34a742c2f1c3 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/DatabaseTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/DatabaseTestBase.php
@@ -12,11 +12,11 @@
  */
 abstract class DatabaseTestBase extends KernelTestBase {
 
-  public static $modules = array('database_test');
+  public static $modules = ['database_test'];
 
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('database_test', array(
+    $this->installSchema('database_test', [
       'test',
       'test_people',
       'test_people_copy',
@@ -27,7 +27,7 @@ protected function setUp() {
       'test_serialized',
       'test_special_columns',
       'TEST_UPPERCASE',
-    ));
+    ]);
     self::addSampleData();
   }
 
@@ -36,19 +36,19 @@ protected function setUp() {
    */
   function ensureSampleDataNull() {
     db_insert('test_null')
-      ->fields(array('name', 'age'))
-      ->values(array(
+      ->fields(['name', 'age'])
+      ->values([
       'name' => 'Kermit',
       'age' => 25,
-    ))
-      ->values(array(
+    ])
+      ->values([
       'name' => 'Fozzie',
       'age' => NULL,
-    ))
-      ->values(array(
+    ])
+      ->values([
       'name' => 'Gonzo',
       'age' => 27,
-    ))
+    ])
       ->execute();
   }
 
@@ -58,89 +58,89 @@ function ensureSampleDataNull() {
   static function addSampleData() {
     // We need the IDs, so we can't use a multi-insert here.
     $john = db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'John',
         'age' => 25,
         'job' => 'Singer',
-      ))
+      ])
       ->execute();
 
     $george = db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'George',
         'age' => 27,
         'job' => 'Singer',
-      ))
+      ])
       ->execute();
 
     db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'Ringo',
         'age' => 28,
         'job' => 'Drummer',
-      ))
+      ])
       ->execute();
 
     $paul = db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'Paul',
         'age' => 26,
         'job' => 'Songwriter',
-      ))
+      ])
       ->execute();
 
     db_insert('test_people')
-      ->fields(array(
+      ->fields([
         'name' => 'Meredith',
         'age' => 30,
         'job' => 'Speaker',
-      ))
+      ])
       ->execute();
 
     db_insert('test_task')
-      ->fields(array('pid', 'task', 'priority'))
-      ->values(array(
+      ->fields(['pid', 'task', 'priority'])
+      ->values([
         'pid' => $john,
         'task' => 'eat',
         'priority' => 3,
-      ))
-      ->values(array(
+      ])
+      ->values([
         'pid' => $john,
         'task' => 'sleep',
         'priority' => 4,
-      ))
-      ->values(array(
+      ])
+      ->values([
         'pid' => $john,
         'task' => 'code',
         'priority' => 1,
-      ))
-      ->values(array(
+      ])
+      ->values([
         'pid' => $george,
         'task' => 'sing',
         'priority' => 2,
-      ))
-      ->values(array(
+      ])
+      ->values([
         'pid' => $george,
         'task' => 'sleep',
         'priority' => 2,
-      ))
-      ->values(array(
+      ])
+      ->values([
         'pid' => $paul,
         'task' => 'found new band',
         'priority' => 1,
-      ))
-      ->values(array(
+      ])
+      ->values([
         'pid' => $paul,
         'task' => 'perform at superbowl',
         'priority' => 3,
-      ))
+      ])
       ->execute();
 
     db_insert('test_special_columns')
-      ->fields(array(
+      ->fields([
         'id' => 1,
         'offset' => 'Offset value 1',
-      ))
+      ])
       ->execute();
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php b/core/tests/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php
index 1545dd9dd3ec070043752a714670d46b831b39b9..37dbab11e3b470de7cd23bc7809a8df223e83e08 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php
@@ -25,8 +25,8 @@ function testSubselectDelete() {
     $pid_to_delete = db_query("SELECT * FROM {test_task} WHERE task = 'sleep'")->fetchField();
 
     $subquery = db_select('test', 't')
-      ->fields('t', array('id'))
-      ->condition('t.id', array($pid_to_delete), 'IN');
+      ->fields('t', ['id'])
+      ->condition('t.id', [$pid_to_delete], 'IN');
     $delete = db_delete('test_task')
       ->condition('task', 'sleep')
       ->condition('pid', $subquery, 'IN');
diff --git a/core/tests/Drupal/KernelTests/Core/Database/FetchTest.php b/core/tests/Drupal/KernelTests/Core/Database/FetchTest.php
index e4f4d670496dd263f840d5c5f5b86cb3865bd6f6..a29811dbd4d6723d168c7cca8c206d2d7d456f4f 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/FetchTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/FetchTest.php
@@ -19,8 +19,8 @@ class FetchTest extends DatabaseTestBase {
    * Confirms that we can fetch a record properly in default object mode.
    */
   function testQueryFetchDefault() {
-    $records = array();
-    $result = db_query('SELECT name FROM {test} WHERE age = :age', array(':age' => 25));
+    $records = [];
+    $result = db_query('SELECT name FROM {test} WHERE age = :age', [':age' => 25]);
     $this->assertTrue($result instanceof StatementInterface, 'Result set is a Drupal statement object.');
     foreach ($result as $record) {
       $records[] = $record;
@@ -35,8 +35,8 @@ function testQueryFetchDefault() {
    * Confirms that we can fetch a record to an object explicitly.
    */
   function testQueryFetchObject() {
-    $records = array();
-    $result = db_query('SELECT name FROM {test} WHERE age = :age', array(':age' => 25), array('fetch' => \PDO::FETCH_OBJ));
+    $records = [];
+    $result = db_query('SELECT name FROM {test} WHERE age = :age', [':age' => 25], ['fetch' => \PDO::FETCH_OBJ]);
     foreach ($result as $record) {
       $records[] = $record;
       $this->assertTrue(is_object($record), 'Record is an object.');
@@ -50,8 +50,8 @@ function testQueryFetchObject() {
    * Confirms that we can fetch a record to an associative array explicitly.
    */
   function testQueryFetchArray() {
-    $records = array();
-    $result = db_query('SELECT name FROM {test} WHERE age = :age', array(':age' => 25), array('fetch' => \PDO::FETCH_ASSOC));
+    $records = [];
+    $result = db_query('SELECT name FROM {test} WHERE age = :age', [':age' => 25], ['fetch' => \PDO::FETCH_ASSOC]);
     foreach ($result as $record) {
       $records[] = $record;
       if ($this->assertTrue(is_array($record), 'Record is an array.')) {
@@ -68,8 +68,8 @@ function testQueryFetchArray() {
    * @see \Drupal\system\Tests\Database\FakeRecord
    */
   function testQueryFetchClass() {
-    $records = array();
-    $result = db_query('SELECT name FROM {test} WHERE age = :age', array(':age' => 25), array('fetch' => 'Drupal\system\Tests\Database\FakeRecord'));
+    $records = [];
+    $result = db_query('SELECT name FROM {test} WHERE age = :age', [':age' => 25], ['fetch' => 'Drupal\system\Tests\Database\FakeRecord']);
     foreach ($result as $record) {
       $records[] = $record;
       if ($this->assertTrue($record instanceof FakeRecord, 'Record is an object of class FakeRecord.')) {
@@ -84,8 +84,8 @@ function testQueryFetchClass() {
    * Confirms that we can fetch a record into an indexed array explicitly.
    */
   function testQueryFetchNum() {
-    $records = array();
-    $result = db_query('SELECT name FROM {test} WHERE age = :age', array(':age' => 25), array('fetch' => \PDO::FETCH_NUM));
+    $records = [];
+    $result = db_query('SELECT name FROM {test} WHERE age = :age', [':age' => 25], ['fetch' => \PDO::FETCH_NUM]);
     foreach ($result as $record) {
       $records[] = $record;
       if ($this->assertTrue(is_array($record), 'Record is an array.')) {
@@ -100,8 +100,8 @@ function testQueryFetchNum() {
    * Confirms that we can fetch a record into a doubly-keyed array explicitly.
    */
   function testQueryFetchBoth() {
-    $records = array();
-    $result = db_query('SELECT name FROM {test} WHERE age = :age', array(':age' => 25), array('fetch' => \PDO::FETCH_BOTH));
+    $records = [];
+    $result = db_query('SELECT name FROM {test} WHERE age = :age', [':age' => 25], ['fetch' => \PDO::FETCH_BOTH]);
     foreach ($result as $record) {
       $records[] = $record;
       if ($this->assertTrue(is_array($record), 'Record is an array.')) {
@@ -130,11 +130,11 @@ public function testQueryFetchAllColumn() {
    * Confirms that we can fetch an entire column of a result set at once.
    */
   function testQueryFetchCol() {
-    $result = db_query('SELECT name FROM {test} WHERE age > :age', array(':age' => 25));
+    $result = db_query('SELECT name FROM {test} WHERE age > :age', [':age' => 25]);
     $column = $result->fetchCol();
     $this->assertIdentical(count($column), 3, 'fetchCol() returns the right number of records.');
 
-    $result = db_query('SELECT name FROM {test} WHERE age > :age', array(':age' => 25));
+    $result = db_query('SELECT name FROM {test} WHERE age > :age', [':age' => 25]);
     $i = 0;
     foreach ($result as $record) {
       $this->assertIdentical($record->name, $column[$i++], 'Column matches direct access.');
diff --git a/core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php b/core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php
index 6e0363aeb3058e89a767b8b6ca9bd319f3daa184..0cf1eba5c33cd6e3882b7bf160a117e471601718 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php
@@ -15,12 +15,12 @@ class InsertDefaultsTest extends DatabaseTestBase {
    * Tests that we can run a query that uses default values for everything.
    */
   function testDefaultInsert() {
-    $query = db_insert('test')->useDefaults(array('job'));
+    $query = db_insert('test')->useDefaults(['job']);
     $id = $query->execute();
 
     $schema = drupal_get_module_schema('database_test', 'test');
 
-    $job = db_query('SELECT job FROM {test} WHERE id = :id', array(':id' => $id))->fetchField();
+    $job = db_query('SELECT job FROM {test} WHERE id = :id', [':id' => $id])->fetchField();
     $this->assertEqual($job, $schema['fields']['job']['default'], 'Default field value is set.');
   }
 
@@ -48,13 +48,13 @@ function testDefaultEmptyInsert() {
    */
   function testDefaultInsertWithFields() {
     $query = db_insert('test')
-      ->fields(array('name' => 'Bob'))
-      ->useDefaults(array('job'));
+      ->fields(['name' => 'Bob'])
+      ->useDefaults(['job']);
     $id = $query->execute();
 
     $schema = drupal_get_module_schema('database_test', 'test');
 
-    $job = db_query('SELECT job FROM {test} WHERE id = :id', array(':id' => $id))->fetchField();
+    $job = db_query('SELECT job FROM {test} WHERE id = :id', [':id' => $id])->fetchField();
     $this->assertEqual($job, $schema['fields']['job']['default'], 'Default field value is set.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/InsertLobTest.php b/core/tests/Drupal/KernelTests/Core/Database/InsertLobTest.php
index cb41dc03987488781d6123de529e684dc854b206..ca4273e7ff8444b6c51865c4bb05307d5f233c40 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/InsertLobTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/InsertLobTest.php
@@ -16,10 +16,10 @@ function testInsertOneBlob() {
     $data = "This is\000a test.";
     $this->assertTrue(strlen($data) === 15, 'Test data contains a NULL.');
     $id = db_insert('test_one_blob')
-      ->fields(array('blob1' => $data))
+      ->fields(['blob1' => $data])
       ->execute();
-    $r = db_query('SELECT * FROM {test_one_blob} WHERE id = :id', array(':id' => $id))->fetchAssoc();
-    $this->assertTrue($r['blob1'] === $data, format_string('Can insert a blob: id @id, @data.', array('@id' => $id, '@data' => serialize($r))));
+    $r = db_query('SELECT * FROM {test_one_blob} WHERE id = :id', [':id' => $id])->fetchAssoc();
+    $this->assertTrue($r['blob1'] === $data, format_string('Can insert a blob: id @id, @data.', ['@id' => $id, '@data' => serialize($r)]));
   }
 
   /**
@@ -27,12 +27,12 @@ function testInsertOneBlob() {
    */
   function testInsertMultipleBlob() {
     $id = db_insert('test_two_blobs')
-      ->fields(array(
+      ->fields([
         'blob1' => 'This is',
         'blob2' => 'a test',
-      ))
+      ])
       ->execute();
-    $r = db_query('SELECT * FROM {test_two_blobs} WHERE id = :id', array(':id' => $id))->fetchAssoc();
+    $r = db_query('SELECT * FROM {test_two_blobs} WHERE id = :id', [':id' => $id])->fetchAssoc();
     $this->assertTrue($r['blob1'] === 'This is' && $r['blob2'] === 'a test', 'Can insert multiple blobs per row.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/InsertTest.php b/core/tests/Drupal/KernelTests/Core/Database/InsertTest.php
index d703f9d3150d15703d6e54bc7c466d74fc831d5d..0c72d2eb6e14bc138af5ed049e6a7c7137795356 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/InsertTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/InsertTest.php
@@ -16,10 +16,10 @@ function testSimpleInsert() {
     $num_records_before = db_query('SELECT COUNT(*) FROM {test}')->fetchField();
 
     $query = db_insert('test');
-    $query->fields(array(
+    $query->fields([
       'name' => 'Yoko',
       'age' => '29',
-    ));
+    ]);
 
     // Check how many records are queued for insertion.
     $this->assertIdentical($query->count(), 1, 'One record is queued for insertion.');
@@ -27,7 +27,7 @@ function testSimpleInsert() {
 
     $num_records_after = db_query('SELECT COUNT(*) FROM {test}')->fetchField();
     $this->assertIdentical($num_records_before + 1, (int) $num_records_after, 'Record inserts correctly.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Yoko'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Yoko'])->fetchField();
     $this->assertIdentical($saved_age, '29', 'Can retrieve after inserting.');
   }
 
@@ -38,23 +38,23 @@ function testMultiInsert() {
     $num_records_before = (int) db_query('SELECT COUNT(*) FROM {test}')->fetchField();
 
     $query = db_insert('test');
-    $query->fields(array(
+    $query->fields([
       'name' => 'Larry',
       'age' => '30',
-    ));
+    ]);
 
     // We should be able to specify values in any order if named.
-    $query->values(array(
+    $query->values([
       'age' => '31',
       'name' => 'Curly',
-    ));
+    ]);
 
     // Check how many records are queued for insertion.
     $this->assertIdentical($query->count(), 2, 'Two records are queued for insertion.');
 
     // We should be able to say "use the field order".
     // This is not the recommended mechanism for most cases, but it should work.
-    $query->values(array('Moe', '32'));
+    $query->values(['Moe', '32']);
 
     // Check how many records are queued for insertion.
     $this->assertIdentical($query->count(), 3, 'Three records are queued for insertion.');
@@ -62,11 +62,11 @@ function testMultiInsert() {
 
     $num_records_after = (int) db_query('SELECT COUNT(*) FROM {test}')->fetchField();
     $this->assertIdentical($num_records_before + 3, $num_records_after, 'Record inserts correctly.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Larry'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Larry'])->fetchField();
     $this->assertIdentical($saved_age, '30', 'Can retrieve after inserting.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Curly'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Curly'])->fetchField();
     $this->assertIdentical($saved_age, '31', 'Can retrieve after inserting.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Moe'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Moe'])->fetchField();
     $this->assertIdentical($saved_age, '32', 'Can retrieve after inserting.');
   }
 
@@ -78,25 +78,25 @@ function testRepeatedInsert() {
 
     $query = db_insert('test');
 
-    $query->fields(array(
+    $query->fields([
       'name' => 'Larry',
       'age' => '30',
-    ));
+    ]);
     // Check how many records are queued for insertion.
     $this->assertIdentical($query->count(), 1, 'One record is queued for insertion.');
     $query->execute();  // This should run the insert, but leave the fields intact.
 
     // We should be able to specify values in any order if named.
-    $query->values(array(
+    $query->values([
       'age' => '31',
       'name' => 'Curly',
-    ));
+    ]);
     // Check how many records are queued for insertion.
     $this->assertIdentical($query->count(), 1, 'One record is queued for insertion.');
     $query->execute();
 
     // We should be able to say "use the field order".
-    $query->values(array('Moe', '32'));
+    $query->values(['Moe', '32']);
 
     // Check how many records are queued for insertion.
     $this->assertIdentical($query->count(), 1, 'One record is queued for insertion.');
@@ -104,11 +104,11 @@ function testRepeatedInsert() {
 
     $num_records_after = db_query('SELECT COUNT(*) FROM {test}')->fetchField();
     $this->assertIdentical((int) $num_records_before + 3, (int) $num_records_after, 'Record inserts correctly.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Larry'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Larry'])->fetchField();
     $this->assertIdentical($saved_age, '30', 'Can retrieve after inserting.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Curly'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Curly'])->fetchField();
     $this->assertIdentical($saved_age, '31', 'Can retrieve after inserting.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Moe'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Moe'])->fetchField();
     $this->assertIdentical($saved_age, '32', 'Can retrieve after inserting.');
   }
 
@@ -119,16 +119,16 @@ function testInsertFieldOnlyDefinition() {
     // This is useful for importers, when we want to create a query and define
     // its fields once, then loop over a multi-insert execution.
     db_insert('test')
-      ->fields(array('name', 'age'))
-      ->values(array('Larry', '30'))
-      ->values(array('Curly', '31'))
-      ->values(array('Moe', '32'))
+      ->fields(['name', 'age'])
+      ->values(['Larry', '30'])
+      ->values(['Curly', '31'])
+      ->values(['Moe', '32'])
       ->execute();
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Larry'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Larry'])->fetchField();
     $this->assertIdentical($saved_age, '30', 'Can retrieve after inserting.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Curly'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Curly'])->fetchField();
     $this->assertIdentical($saved_age, '31', 'Can retrieve after inserting.');
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Moe'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Moe'])->fetchField();
     $this->assertIdentical($saved_age, '32', 'Can retrieve after inserting.');
   }
 
@@ -137,10 +137,10 @@ function testInsertFieldOnlyDefinition() {
    */
   function testInsertLastInsertID() {
     $id = db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'Larry',
         'age' => '30',
-      ))
+      ])
       ->execute();
 
     $this->assertIdentical($id, '5', 'Auto-increment ID returned successfully.');
@@ -156,7 +156,7 @@ function testInsertSelectFields() {
     // re-ordered.
     $query->addExpression('tp.age', 'age');
     $query
-      ->fields('tp', array('name', 'job'))
+      ->fields('tp', ['name', 'job'])
       ->condition('tp.name', 'Meredith');
 
     // The resulting query should be equivalent to:
@@ -168,7 +168,7 @@ function testInsertSelectFields() {
       ->from($query)
       ->execute();
 
-    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Meredith'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Meredith'])->fetchField();
     $this->assertIdentical($saved_age, '30', 'Can retrieve after inserting.');
   }
 
@@ -189,7 +189,7 @@ function testInsertSelectAll() {
       ->from($query)
       ->execute();
 
-    $saved_age = db_query('SELECT age FROM {test_people_copy} WHERE name = :name', array(':name' => 'Meredith'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test_people_copy} WHERE name = :name', [':name' => 'Meredith'])->fetchField();
     $this->assertIdentical($saved_age, '30', 'Can retrieve after inserting.');
   }
 
@@ -198,12 +198,12 @@ function testInsertSelectAll() {
    */
   function testSpecialColumnInsert() {
     $id = db_insert('test_special_columns')
-      ->fields(array(
+      ->fields([
         'id' => 2,
         'offset' => 'Offset value 2',
-      ))
+      ])
       ->execute();
-    $saved_value = db_query('SELECT "offset" FROM {test_special_columns} WHERE id = :id', array(':id' => 2))->fetchField();
+    $saved_value = db_query('SELECT "offset" FROM {test_special_columns} WHERE id = :id', [':id' => 2])->fetchField();
     $this->assertIdentical($saved_value, 'Offset value 2', 'Can retrieve special column name value after inserting.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/InvalidDataTest.php b/core/tests/Drupal/KernelTests/Core/Database/InvalidDataTest.php
index 774a20b8beca0fc24737d05d13ceb6aeda416cc9..bf64bc8d0c5e538990c9187146e8a7607bb31a50 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/InvalidDataTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/InvalidDataTest.php
@@ -18,27 +18,27 @@ function testInsertDuplicateData() {
     // Try to insert multiple records where at least one has bad data.
     try {
       db_insert('test')
-        ->fields(array('name', 'age', 'job'))
-        ->values(array(
+        ->fields(['name', 'age', 'job'])
+        ->values([
           'name' => 'Elvis',
           'age' => 63,
           'job' => 'Singer',
-        ))->values(array(
+        ])->values([
           'name' => 'John', // <-- Duplicate value on unique field.
           'age' => 17,
           'job' => 'Consultant',
-        ))
-        ->values(array(
+        ])
+        ->values([
           'name' => 'Frank',
           'age' => 75,
           'job' => 'Singer',
-        ))
+        ])
         ->execute();
       $this->fail('Insert succeeded when it should not have.');
     }
     catch (IntegrityConstraintViolationException $e) {
       // Check if the first record was inserted.
-      $name = db_query('SELECT name FROM {test} WHERE age = :age', array(':age' => 63))->fetchField();
+      $name = db_query('SELECT name FROM {test} WHERE age = :age', [':age' => 63])->fetchField();
 
       if ($name == 'Elvis') {
         if (!Database::getConnection()->supportsTransactions()) {
@@ -58,8 +58,8 @@ function testInsertDuplicateData() {
 
       // Ensure the other values were not inserted.
       $record = db_select('test')
-        ->fields('test', array('name', 'age'))
-        ->condition('age', array(17, 75), 'IN')
+        ->fields('test', ['name', 'age'])
+        ->condition('age', [17, 75], 'IN')
         ->execute()->fetchObject();
 
       $this->assertFalse($record, 'The rest of the insert aborted as expected.');
diff --git a/core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php b/core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php
index 4b24ebefbd7a7beaf4e6a9984916f23f9be41893..a0aaa14c6e347413793bbb064a8a09097081b8fd 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php
@@ -29,7 +29,7 @@ function testMaxAllowedPacketQueryTruncating() {
       if (Environment::checkMemoryLimit($max_allowed_packet + (16 * 1024 * 1024))) {
         $long_name = str_repeat('a', $max_allowed_packet + 1);
         try {
-          db_query('SELECT name FROM {test} WHERE name = :name', array(':name' => $long_name));
+          db_query('SELECT name FROM {test} WHERE name = :name', [':name' => $long_name]);
           $this->fail("An exception should be thrown for queries larger than 'max_allowed_packet'");
         }
         catch (DatabaseException $e) {
diff --git a/core/tests/Drupal/KernelTests/Core/Database/LoggingTest.php b/core/tests/Drupal/KernelTests/Core/Database/LoggingTest.php
index c354c8292b57ec5be7189c848a178420f449ee8c..ac10fe876144b0d7536608863575f58802bf9c4d 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/LoggingTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/LoggingTest.php
@@ -17,11 +17,11 @@ class LoggingTest extends DatabaseTestBase {
   function testEnableLogging() {
     Database::startLog('testing');
 
-    db_query('SELECT name FROM {test} WHERE age > :age', array(':age' => 25))->fetchCol();
-    db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'))->fetchCol();
+    db_query('SELECT name FROM {test} WHERE age > :age', [':age' => 25])->fetchCol();
+    db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'])->fetchCol();
 
     // Trigger a call that does not have file in the backtrace.
-    call_user_func_array('db_query', array('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo')))->fetchCol();
+    call_user_func_array('db_query', ['SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo']])->fetchCol();
 
     $queries = Database::getLog('testing', 'default');
 
@@ -38,11 +38,11 @@ function testEnableLogging() {
   function testEnableMultiLogging() {
     Database::startLog('testing1');
 
-    db_query('SELECT name FROM {test} WHERE age > :age', array(':age' => 25))->fetchCol();
+    db_query('SELECT name FROM {test} WHERE age > :age', [':age' => 25])->fetchCol();
 
     Database::startLog('testing2');
 
-    db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'))->fetchCol();
+    db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'])->fetchCol();
 
     $queries1 = Database::getLog('testing1');
     $queries2 = Database::getLog('testing2');
@@ -62,9 +62,9 @@ function testEnableTargetLogging() {
 
     Database::startLog('testing1');
 
-    db_query('SELECT name FROM {test} WHERE age > :age', array(':age' => 25))->fetchCol();
+    db_query('SELECT name FROM {test} WHERE age > :age', [':age' => 25])->fetchCol();
 
-    db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'), array('target' => 'replica'));//->fetchCol();
+    db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'], ['target' => 'replica']);//->fetchCol();
 
     $queries1 = Database::getLog('testing1');
 
@@ -83,14 +83,14 @@ function testEnableTargetLogging() {
   function testEnableTargetLoggingNoTarget() {
     Database::startLog('testing1');
 
-    db_query('SELECT name FROM {test} WHERE age > :age', array(':age' => 25))->fetchCol();
+    db_query('SELECT name FROM {test} WHERE age > :age', [':age' => 25])->fetchCol();
 
     // We use "fake" here as a target because any non-existent target will do.
     // However, because all of the tests in this class share a single page
     // request there is likely to be a target of "replica" from one of the other
     // unit tests, so we use a target here that we know with absolute certainty
     // does not exist.
-    db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'), array('target' => 'fake'))->fetchCol();
+    db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'], ['target' => 'fake'])->fetchCol();
 
     $queries1 = Database::getLog('testing1');
 
@@ -111,11 +111,11 @@ function testEnableMultiConnectionLogging() {
     Database::startLog('testing1');
     Database::startLog('testing1', 'test2');
 
-    db_query('SELECT name FROM {test} WHERE age > :age', array(':age' => 25))->fetchCol();
+    db_query('SELECT name FROM {test} WHERE age > :age', [':age' => 25])->fetchCol();
 
     $old_key = db_set_active('test2');
 
-    db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'), array('target' => 'replica'))->fetchCol();
+    db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'], ['target' => 'replica'])->fetchCol();
 
     db_set_active($old_key);
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/MergeTest.php b/core/tests/Drupal/KernelTests/Core/Database/MergeTest.php
index 34b81d0f212b58661bdbc2c947d6c3c3fa7da88c..853e5b2f0cd56368276263150c05c432f87bf82c 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/MergeTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/MergeTest.php
@@ -20,10 +20,10 @@ function testMergeInsert() {
 
     $result = db_merge('test_people')
       ->key('job', 'Presenter')
-      ->fields(array(
+      ->fields([
         'age' => 31,
         'name' => 'Tiffany',
-      ))
+      ])
       ->execute();
 
     $this->assertEqual($result, Merge::STATUS_INSERT, 'Insert status returned.');
@@ -31,7 +31,7 @@ function testMergeInsert() {
     $num_records_after = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before + 1, $num_records_after, 'Merge inserted properly.');
 
-    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Presenter'))->fetch();
+    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Presenter'])->fetch();
     $this->assertEqual($person->name, 'Tiffany', 'Name set correctly.');
     $this->assertEqual($person->age, 31, 'Age set correctly.');
     $this->assertEqual($person->job, 'Presenter', 'Job set correctly.');
@@ -45,10 +45,10 @@ function testMergeUpdate() {
 
     $result = db_merge('test_people')
       ->key('job', 'Speaker')
-      ->fields(array(
+      ->fields([
         'age' => 31,
         'name' => 'Tiffany',
-      ))
+      ])
       ->execute();
 
     $this->assertEqual($result, Merge::STATUS_UPDATE, 'Update status returned.');
@@ -56,7 +56,7 @@ function testMergeUpdate() {
     $num_records_after = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before, $num_records_after, 'Merge updated properly.');
 
-    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Speaker'))->fetch();
+    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Speaker'])->fetch();
     $this->assertEqual($person->name, 'Tiffany', 'Name set correctly.');
     $this->assertEqual($person->age, 31, 'Age set correctly.');
     $this->assertEqual($person->job, 'Speaker', 'Job set correctly.');
@@ -73,14 +73,14 @@ function testMergeUpdateExcept() {
 
     db_merge('test_people')
       ->key('job', 'Speaker')
-      ->insertFields(array('age' => 31))
-      ->updateFields(array('name' => 'Tiffany'))
+      ->insertFields(['age' => 31])
+      ->updateFields(['name' => 'Tiffany'])
       ->execute();
 
     $num_records_after = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before, $num_records_after, 'Merge updated properly.');
 
-    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Speaker'))->fetch();
+    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Speaker'])->fetch();
     $this->assertEqual($person->name, 'Tiffany', 'Name set correctly.');
     $this->assertEqual($person->age, 30, 'Age skipped correctly.');
     $this->assertEqual($person->job, 'Speaker', 'Job set correctly.');
@@ -94,19 +94,19 @@ function testMergeUpdateExplicit() {
 
     db_merge('test_people')
       ->key('job', 'Speaker')
-      ->insertFields(array(
+      ->insertFields([
         'age' => 31,
         'name' => 'Tiffany',
-      ))
-      ->updateFields(array(
+      ])
+      ->updateFields([
         'name' => 'Joe',
-      ))
+      ])
       ->execute();
 
     $num_records_after = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before, $num_records_after, 'Merge updated properly.');
 
-    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Speaker'))->fetch();
+    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Speaker'])->fetch();
     $this->assertEqual($person->name, 'Joe', 'Name set correctly.');
     $this->assertEqual($person->age, 30, 'Age skipped correctly.');
     $this->assertEqual($person->job, 'Speaker', 'Job set correctly.');
@@ -118,7 +118,7 @@ function testMergeUpdateExplicit() {
   function testMergeUpdateExpression() {
     $num_records_before = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
 
-    $age_before = db_query('SELECT age FROM {test_people} WHERE job = :job', array(':job' => 'Speaker'))->fetchField();
+    $age_before = db_query('SELECT age FROM {test_people} WHERE job = :job', [':job' => 'Speaker'])->fetchField();
 
     // This is a very contrived example, as I have no idea why you'd want to
     // change age this way, but that's beside the point.
@@ -127,15 +127,15 @@ function testMergeUpdateExpression() {
     // which is what is supposed to happen.
     db_merge('test_people')
       ->key('job', 'Speaker')
-      ->fields(array('name' => 'Tiffany'))
-      ->insertFields(array('age' => 31))
-      ->expression('age', 'age + :age', array(':age' => 4))
+      ->fields(['name' => 'Tiffany'])
+      ->insertFields(['age' => 31])
+      ->expression('age', 'age + :age', [':age' => 4])
       ->execute();
 
     $num_records_after = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before, $num_records_after, 'Merge updated properly.');
 
-    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Speaker'))->fetch();
+    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Speaker'])->fetch();
     $this->assertEqual($person->name, 'Tiffany', 'Name set correctly.');
     $this->assertEqual($person->age, $age_before + 4, 'Age updated correctly.');
     $this->assertEqual($person->job, 'Speaker', 'Job set correctly.');
@@ -154,7 +154,7 @@ function testMergeInsertWithoutUpdate() {
     $num_records_after = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before + 1, $num_records_after, 'Merge inserted properly.');
 
-    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Presenter'))->fetch();
+    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Presenter'])->fetch();
     $this->assertEqual($person->name, '', 'Name set correctly.');
     $this->assertEqual($person->age, 0, 'Age set correctly.');
     $this->assertEqual($person->job, 'Presenter', 'Job set correctly.');
@@ -173,20 +173,20 @@ function testMergeUpdateWithoutUpdate() {
     $num_records_after = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before, $num_records_after, 'Merge skipped properly.');
 
-    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Speaker'))->fetch();
+    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Speaker'])->fetch();
     $this->assertEqual($person->name, 'Meredith', 'Name skipped correctly.');
     $this->assertEqual($person->age, 30, 'Age skipped correctly.');
     $this->assertEqual($person->job, 'Speaker', 'Job skipped correctly.');
 
     db_merge('test_people')
       ->key('job', 'Speaker')
-      ->insertFields(array('age' => 31))
+      ->insertFields(['age' => 31])
       ->execute();
 
     $num_records_after = db_query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before, $num_records_after, 'Merge skipped properly.');
 
-    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Speaker'))->fetch();
+    $person = db_query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Speaker'])->fetch();
     $this->assertEqual($person->name, 'Meredith', 'Name skipped correctly.');
     $this->assertEqual($person->age, 30, 'Age skipped correctly.');
     $this->assertEqual($person->job, 'Speaker', 'Job skipped correctly.');
@@ -202,10 +202,10 @@ function testInvalidMerge() {
       // the throw_exception option.
       $options['throw_exception'] = FALSE;
       db_merge('test_people', $options)
-        ->fields(array(
+        ->fields([
           'age' => 31,
           'name' => 'Tiffany',
-        ))
+        ])
         ->execute();
       $this->pass('$options[\'throw_exception\'] is FALSE, no InvalidMergeQueryException thrown.');
     }
@@ -217,10 +217,10 @@ function testInvalidMerge() {
     try {
       // This query will fail because there is no key field specified.
       db_merge('test_people')
-        ->fields(array(
+        ->fields([
           'age' => 31,
           'name' => 'Tiffany',
-        ))
+        ])
         ->execute();
     }
     catch (InvalidMergeQueryException $e) {
diff --git a/core/tests/Drupal/KernelTests/Core/Database/NextIdTest.php b/core/tests/Drupal/KernelTests/Core/Database/NextIdTest.php
index b0cdc857faf92e3244bc7ff74966aff08a8e5b2b..5c0239f449b3504a79c5b173255271fc4ebc36ee 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/NextIdTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/NextIdTest.php
@@ -15,7 +15,7 @@ class NextIdTest extends KernelTestBase {
    * The modules to enable.
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   protected function setUp() {
     parent::setUp();
diff --git a/core/tests/Drupal/KernelTests/Core/Database/QueryTest.php b/core/tests/Drupal/KernelTests/Core/Database/QueryTest.php
index f84a9c860d70f5af6654ffc91b80c1472f6fcd98..966f96f667ce1e78081c800624a895cd32547577 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/QueryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/QueryTest.php
@@ -13,10 +13,10 @@ class QueryTest extends DatabaseTestBase {
    * Tests that we can pass an array of values directly in the query.
    */
   function testArraySubstitution() {
-    $names = db_query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', array(':ages[]' => array(25, 26, 27)))->fetchAll();
+    $names = db_query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', [':ages[]' => [25, 26, 27]])->fetchAll();
     $this->assertEqual(count($names), 3, 'Correct number of names returned');
 
-    $names = db_query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', array(':ages[]' => array(25)))->fetchAll();
+    $names = db_query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', [':ages[]' => [25]])->fetchAll();
     $this->assertEqual(count($names), 1, 'Correct number of names returned');
   }
 
@@ -25,7 +25,7 @@ function testArraySubstitution() {
    */
   function testScalarSubstitution() {
     try {
-      $names = db_query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', array(':ages[]' => 25))->fetchAll();
+      $names = db_query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', [':ages[]' => 25])->fetchAll();
       $this->fail('Array placeholder with scalar argument should result in an exception.');
     }
     catch (\InvalidArgumentException $e) {
@@ -39,12 +39,12 @@ function testScalarSubstitution() {
    */
   public function testArrayArgumentsSQLInjection() {
     // Attempt SQL injection and verify that it does not work.
-    $condition = array(
+    $condition = [
       "1 ;INSERT INTO {test} (name) VALUES ('test12345678'); -- " => '',
       '1' => '',
-    );
+    ];
     try {
-      db_query("SELECT * FROM {test} WHERE name = :name", array(':name' => $condition))->fetchObject();
+      db_query("SELECT * FROM {test} WHERE name = :name", [':name' => $condition])->fetchObject();
       $this->fail('SQL injection attempt via array arguments should result in a database exception.');
     }
     catch (\InvalidArgumentException $e) {
@@ -101,7 +101,7 @@ public function testConditionOperatorArgumentsSQLInjection() {
 
     try {
       $result = db_select('test', 't')
-        ->fields('t', array('name', 'name'))
+        ->fields('t', ['name', 'name'])
         ->condition('name', 1, $injection)
         ->execute();
       $this->fail('Should not be able to attempt SQL injection via operator.');
@@ -118,7 +118,7 @@ public function testConditionOperatorArgumentsSQLInjection() {
 
     try {
       $result = db_select('test', 't')
-        ->fields('t', array('name'))
+        ->fields('t', ['name'])
         ->condition('name', 1, $injection)
         ->execute();
       $this->fail('Should not be able to attempt SQL injection via operator.');
@@ -139,9 +139,9 @@ public function testNumericExpressionSubstitution() {
     $count = db_query('SELECT COUNT(*) >= 3 FROM {test}')->fetchField();
     $this->assertEqual((bool) $count, TRUE);
 
-    $count = db_query('SELECT COUNT(*) >= :count FROM {test}', array(
+    $count = db_query('SELECT COUNT(*) >= :count FROM {test}', [
       ':count' => 3,
-    ))->fetchField();
+    ])->fetchField();
     $this->assertEqual((bool) $count, TRUE);
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/RangeQueryTest.php b/core/tests/Drupal/KernelTests/Core/Database/RangeQueryTest.php
index 33f315b7cb1f040d28cd69fbeaa31ac21e002491..44c25350034f6fe290190cdf3b3769bab032dfe9 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/RangeQueryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/RangeQueryTest.php
@@ -14,7 +14,7 @@ class RangeQueryTest extends DatabaseTestBase {
    *
    * @var array
    */
-  public static $modules = array('database_test');
+  public static $modules = ['database_test'];
 
   /**
    * Confirms that range queries work and return the correct result.
diff --git a/core/tests/Drupal/KernelTests/Core/Database/RegressionTest.php b/core/tests/Drupal/KernelTests/Core/Database/RegressionTest.php
index e13bcfe554201b1be905a382812dfaa33cd85a78..29a966a08eee872c1eaea33f22c4caf78ca7ed9b 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/RegressionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/RegressionTest.php
@@ -14,7 +14,7 @@ class RegressionTest extends DatabaseTestBase {
    *
    * @var array
    */
-  public static $modules = array('node', 'user');
+  public static $modules = ['node', 'user'];
 
   /**
    * Ensures that non-ASCII UTF-8 data is stored in the database properly.
@@ -23,13 +23,13 @@ function testRegression_310447() {
     // That's a 255 character UTF-8 string.
     $job = str_repeat("é", 255);
     db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => $this->randomMachineName(),
         'age' => 20,
         'job' => $job,
-      ))->execute();
+      ])->execute();
 
-    $from_database = db_query('SELECT job FROM {test} WHERE job = :job', array(':job' => $job))->fetchField();
+    $from_database = db_query('SELECT job FROM {test} WHERE job = :job', [':job' => $job])->fetchField();
     $this->assertIdentical($job, $from_database, 'The database handles UTF-8 characters cleanly.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SchemaTest.php b/core/tests/Drupal/KernelTests/Core/Database/SchemaTest.php
index 8641fd3c9cc4e196015a084a321412997179c0b8..346c4ce0eac1048c5beb3973c54bd80d5408428f 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SchemaTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SchemaTest.php
@@ -26,32 +26,32 @@ class SchemaTest extends KernelTestBase {
    */
   function testSchema() {
     // Try creating a table.
-    $table_specification = array(
+    $table_specification = [
       'description' => 'Schema table description may contain "quotes" and could be long—very long indeed.',
-      'fields' => array(
-        'id'  => array(
+      'fields' => [
+        'id'  => [
           'type' => 'int',
           'default' => NULL,
-        ),
-        'test_field'  => array(
+        ],
+        'test_field'  => [
           'type' => 'int',
           'not null' => TRUE,
           'description' => 'Schema table description may contain "quotes" and could be long—very long indeed. There could be "multiple quoted regions".',
-        ),
-        'test_field_string'  => array(
+        ],
+        'test_field_string'  => [
           'type' => 'varchar',
           'length' => 20,
           'not null' => TRUE,
           'default' => "'\"funky default'\"",
           'description' => 'Schema column description for string.',
-        ),
-        'test_field_string_ascii'  => array(
+        ],
+        'test_field_string_ascii'  => [
           'type' => 'varchar_ascii',
           'length' => 255,
           'description' => 'Schema column description for ASCII string.',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     db_create_table('test_table', $table_specification);
 
     // Assert that the table exists.
@@ -95,7 +95,7 @@ function testSchema() {
     $index_exists = Database::getConnection()->schema()->indexExists('test_table', 'test_field');
     $this->assertIdentical($index_exists, FALSE, 'Fake index does not exists');
     // Add index.
-    db_add_index('test_table', 'test_field', array('test_field'), $table_specification);
+    db_add_index('test_table', 'test_field', ['test_field'], $table_specification);
     // Test for created index and test for the boolean result of indexExists().
     $index_exists = Database::getConnection()->schema()->indexExists('test_table', 'test_field');
     $this->assertIdentical($index_exists, TRUE, 'Index created.');
@@ -123,13 +123,13 @@ function testSchema() {
     // Recreate the table.
     db_create_table('test_table', $table_specification);
     db_field_set_default('test_table', 'test_field', 0);
-    db_add_field('test_table', 'test_serial', array('type' => 'int', 'not null' => TRUE, 'default' => 0, 'description' => 'Added column description.'));
+    db_add_field('test_table', 'test_serial', ['type' => 'int', 'not null' => TRUE, 'default' => 0, 'description' => 'Added column description.']);
 
     // Assert that the column comment has been set.
     $this->checkSchemaComment('Added column description.', 'test_table', 'test_serial');
 
     // Change the new field to a serial column.
-    db_change_field('test_table', 'test_serial', 'test_serial', array('type' => 'serial', 'not null' => TRUE, 'description' => 'Changed column description.'), array('primary key' => array('test_serial')));
+    db_change_field('test_table', 'test_serial', 'test_serial', ['type' => 'serial', 'not null' => TRUE, 'description' => 'Changed column description.'], ['primary key' => ['test_serial']]);
 
     // Assert that the column comment has been set.
     $this->checkSchemaComment('Changed column description.', 'test_table', 'test_serial');
@@ -145,22 +145,22 @@ function testSchema() {
 
     // Test renaming of keys and constraints.
     db_drop_table('test_table');
-    $table_specification = array(
-      'fields' => array(
-        'id'  => array(
+    $table_specification = [
+      'fields' => [
+        'id'  => [
           'type' => 'serial',
           'not null' => TRUE,
-        ),
-        'test_field'  => array(
+        ],
+        'test_field'  => [
           'type' => 'int',
           'default' => 0,
-        ),
-      ),
-      'primary key' => array('id'),
-      'unique keys' => array(
-        'test_field' => array('test_field'),
-      ),
-    );
+        ],
+      ],
+      'primary key' => ['id'],
+      'unique keys' => [
+        'test_field' => ['test_field'],
+      ],
+    ];
     db_create_table('test_table', $table_specification);
 
     // Tests for indexes are Database specific.
@@ -215,18 +215,18 @@ function testSchema() {
     }
 
     // Use database specific data type and ensure that table is created.
-    $table_specification = array(
+    $table_specification = [
       'description' => 'Schema table description.',
-      'fields' => array(
-        'timestamp'  => array(
+      'fields' => [
+        'timestamp'  => [
           'mysql_type' => 'timestamp',
           'pgsql_type' => 'timestamp',
           'sqlite_type' => 'datetime',
           'not null' => FALSE,
           'default' => NULL,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     try {
       db_create_table('test_timestamp', $table_specification);
     }
@@ -244,52 +244,52 @@ function testIndexLength() {
     if (Database::getConnection()->databaseType() != 'mysql') {
       return;
     }
-    $table_specification = array(
-      'fields' => array(
-        'id'  => array(
+    $table_specification = [
+      'fields' => [
+        'id'  => [
           'type' => 'int',
           'default' => NULL,
-        ),
-        'test_field_text'  => array(
+        ],
+        'test_field_text'  => [
           'type' => 'text',
           'not null' => TRUE,
-        ),
-        'test_field_string_long'  => array(
+        ],
+        'test_field_string_long'  => [
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
-        ),
-        'test_field_string_ascii_long'  => array(
+        ],
+        'test_field_string_ascii_long'  => [
           'type' => 'varchar_ascii',
           'length' => 255,
-        ),
-        'test_field_string_short'  => array(
+        ],
+        'test_field_string_short'  => [
           'type' => 'varchar',
           'length' => 128,
           'not null' => TRUE,
-        ),
-      ),
-      'indexes' => array(
-        'test_regular' => array(
+        ],
+      ],
+      'indexes' => [
+        'test_regular' => [
           'test_field_text',
           'test_field_string_long',
           'test_field_string_ascii_long',
           'test_field_string_short',
-        ),
-        'test_length' => array(
-          array('test_field_text', 128),
-          array('test_field_string_long', 128),
-          array('test_field_string_ascii_long', 128),
-          array('test_field_string_short', 128),
-        ),
-        'test_mixed' => array(
-          array('test_field_text', 200),
+        ],
+        'test_length' => [
+          ['test_field_text', 128],
+          ['test_field_string_long', 128],
+          ['test_field_string_ascii_long', 128],
+          ['test_field_string_short', 128],
+        ],
+        'test_mixed' => [
+          ['test_field_text', 200],
           'test_field_string_long',
-          array('test_field_string_ascii_long', 200),
+          ['test_field_string_ascii_long', 200],
           'test_field_string_short',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     db_create_table('test_table_index_length', $table_specification);
 
     $schema_object = Database::getConnection()->schema();
@@ -331,29 +331,29 @@ function testIndexLength() {
 
     // Get index information.
     $results = db_query('SHOW INDEX FROM {test_table_index_length}');
-    $expected_lengths = array(
-      'test_regular' => array(
+    $expected_lengths = [
+      'test_regular' => [
         'test_field_text' => 191,
         'test_field_string_long' => 191,
         'test_field_string_ascii_long' => NULL,
         'test_field_string_short' => NULL,
-      ),
-      'test_length' => array(
+      ],
+      'test_length' => [
         'test_field_text' => 128,
         'test_field_string_long' => 128,
         'test_field_string_ascii_long' => 128,
         'test_field_string_short' => NULL,
-      ),
-      'test_mixed' => array(
+      ],
+      'test_mixed' => [
         'test_field_text' => 191,
         'test_field_string_long' => 191,
         'test_field_string_ascii_long' => 200,
         'test_field_string_short' => NULL,
-      ),
-      'test_separate' => array(
+      ],
+      'test_separate' => [
         'test_field_text' => 191,
-      ),
-    );
+      ],
+    ];
 
     // Count the number of columns defined in the indexes.
     $column_count = 0;
@@ -382,7 +382,7 @@ function testIndexLength() {
   function tryInsert($table = 'test_table') {
     try {
       db_insert($table)
-        ->fields(array('id' => mt_rand(10, 20)))
+        ->fields(['id' => mt_rand(10, 20)])
         ->execute();
       return TRUE;
     }
@@ -419,18 +419,18 @@ function checkSchemaComment($description, $table, $column = NULL) {
   function testUnsignedColumns() {
     // First create the table with just a serial column.
     $table_name = 'unsigned_table';
-    $table_spec = array(
-      'fields' => array('serial_column' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE)),
-      'primary key' => array('serial_column'),
-    );
+    $table_spec = [
+      'fields' => ['serial_column' => ['type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE]],
+      'primary key' => ['serial_column'],
+    ];
     db_create_table($table_name, $table_spec);
 
     // Now set up columns for the other types.
-    $types = array('int', 'float', 'numeric');
+    $types = ['int', 'float', 'numeric'];
     foreach ($types as $type) {
-      $column_spec = array('type' => $type, 'unsigned' => TRUE);
+      $column_spec = ['type' => $type, 'unsigned' => TRUE];
       if ($type == 'numeric') {
-        $column_spec += array('precision' => 10, 'scale' => 0);
+        $column_spec += ['precision' => 10, 'scale' => 0];
       }
       $column_name = $type . '_column';
       $table_spec['fields'][$column_name] = $column_spec;
@@ -439,8 +439,8 @@ function testUnsignedColumns() {
 
     // Finally, check each column and try to insert invalid values into them.
     foreach ($table_spec['fields'] as $column_name => $column_spec) {
-      $this->assertTrue(db_field_exists($table_name, $column_name), format_string('Unsigned @type column was created.', array('@type' => $column_spec['type'])));
-      $this->assertFalse($this->tryUnsignedInsert($table_name, $column_name), format_string('Unsigned @type column rejected a negative value.', array('@type' => $column_spec['type'])));
+      $this->assertTrue(db_field_exists($table_name, $column_name), format_string('Unsigned @type column was created.', ['@type' => $column_spec['type']]));
+      $this->assertFalse($this->tryUnsignedInsert($table_name, $column_name), format_string('Unsigned @type column rejected a negative value.', ['@type' => $column_spec['type']]));
     }
   }
 
@@ -458,7 +458,7 @@ function testUnsignedColumns() {
   function tryUnsignedInsert($table_name, $column_name) {
     try {
       db_insert($table_name)
-        ->fields(array($column_name => -1))
+        ->fields([$column_name => -1])
         ->execute();
       return TRUE;
     }
@@ -472,20 +472,20 @@ function tryUnsignedInsert($table_name, $column_name) {
    */
   function testSchemaAddField() {
     // Test varchar types.
-    foreach (array(1, 32, 128, 256, 512) as $length) {
-      $base_field_spec = array(
+    foreach ([1, 32, 128, 256, 512] as $length) {
+      $base_field_spec = [
         'type' => 'varchar',
         'length' => $length,
-      );
-      $variations = array(
-        array('not null' => FALSE),
-        array('not null' => FALSE, 'default' => '7'),
-        array('not null' => FALSE, 'default' => substr('"thing"', 0, $length)),
-        array('not null' => FALSE, 'default' => substr("\"'hing", 0, $length)),
-        array('not null' => TRUE, 'initial' => 'd'),
-        array('not null' => FALSE, 'default' => NULL),
-        array('not null' => TRUE, 'initial' => 'd', 'default' => '7'),
-      );
+      ];
+      $variations = [
+        ['not null' => FALSE],
+        ['not null' => FALSE, 'default' => '7'],
+        ['not null' => FALSE, 'default' => substr('"thing"', 0, $length)],
+        ['not null' => FALSE, 'default' => substr("\"'hing", 0, $length)],
+        ['not null' => TRUE, 'initial' => 'd'],
+        ['not null' => FALSE, 'default' => NULL],
+        ['not null' => TRUE, 'initial' => 'd', 'default' => '7'],
+      ];
 
       foreach ($variations as $variation) {
         $field_spec = $variation + $base_field_spec;
@@ -494,19 +494,19 @@ function testSchemaAddField() {
     }
 
     // Test int and float types.
-    foreach (array('int', 'float') as $type) {
-      foreach (array('tiny', 'small', 'medium', 'normal', 'big') as $size) {
-        $base_field_spec = array(
+    foreach (['int', 'float'] as $type) {
+      foreach (['tiny', 'small', 'medium', 'normal', 'big'] as $size) {
+        $base_field_spec = [
           'type' => $type,
           'size' => $size,
-        );
-        $variations = array(
-          array('not null' => FALSE),
-          array('not null' => FALSE, 'default' => 7),
-          array('not null' => TRUE, 'initial' => 1),
-          array('not null' => TRUE, 'initial' => 1, 'default' => 7),
-          array('not null' => TRUE, 'initial_from_field' => 'serial_column'),
-        );
+        ];
+        $variations = [
+          ['not null' => FALSE],
+          ['not null' => FALSE, 'default' => 7],
+          ['not null' => TRUE, 'initial' => 1],
+          ['not null' => TRUE, 'initial' => 1, 'default' => 7],
+          ['not null' => TRUE, 'initial_from_field' => 'serial_column'],
+        ];
 
         foreach ($variations as $variation) {
           $field_spec = $variation + $base_field_spec;
@@ -516,25 +516,25 @@ function testSchemaAddField() {
     }
 
     // Test numeric types.
-    foreach (array(1, 5, 10, 40, 65) as $precision) {
-      foreach (array(0, 2, 10, 30) as $scale) {
+    foreach ([1, 5, 10, 40, 65] as $precision) {
+      foreach ([0, 2, 10, 30] as $scale) {
         // Skip combinations where precision is smaller than scale.
         if ($precision <= $scale) {
           continue;
         }
 
-        $base_field_spec = array(
+        $base_field_spec = [
           'type' => 'numeric',
           'scale' => $scale,
           'precision' => $precision,
-        );
-        $variations = array(
-          array('not null' => FALSE),
-          array('not null' => FALSE, 'default' => 7),
-          array('not null' => TRUE, 'initial' => 1),
-          array('not null' => TRUE, 'initial' => 1, 'default' => 7),
-          array('not null' => TRUE, 'initial_from_field' => 'serial_column'),
-        );
+        ];
+        $variations = [
+          ['not null' => FALSE],
+          ['not null' => FALSE, 'default' => 7],
+          ['not null' => TRUE, 'initial' => 1],
+          ['not null' => TRUE, 'initial' => 1, 'default' => 7],
+          ['not null' => TRUE, 'initial_from_field' => 'serial_column'],
+        ];
 
         foreach ($variations as $variation) {
           $field_spec = $variation + $base_field_spec;
@@ -556,15 +556,15 @@ function testSchemaAddField() {
   protected function assertFieldAdditionRemoval($field_spec) {
     // Try creating the field on a new table.
     $table_name = 'test_table_' . ($this->counter++);
-    $table_spec = array(
-      'fields' => array(
-        'serial_column' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE),
+    $table_spec = [
+      'fields' => [
+        'serial_column' => ['type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE],
         'test_field' => $field_spec,
-      ),
-      'primary key' => array('serial_column'),
-    );
+      ],
+      'primary key' => ['serial_column'],
+    ];
     db_create_table($table_name, $table_spec);
-    $this->pass(format_string('Table %table created.', array('%table' => $table_name)));
+    $this->pass(format_string('Table %table created.', ['%table' => $table_name]));
 
     // Check the characteristics of the field.
     $this->assertFieldCharacteristics($table_name, 'test_field', $field_spec);
@@ -574,24 +574,24 @@ protected function assertFieldAdditionRemoval($field_spec) {
 
     // Try adding a field to an existing table.
     $table_name = 'test_table_' . ($this->counter++);
-    $table_spec = array(
-      'fields' => array(
-        'serial_column' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE),
-      ),
-      'primary key' => array('serial_column'),
-    );
+    $table_spec = [
+      'fields' => [
+        'serial_column' => ['type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE],
+      ],
+      'primary key' => ['serial_column'],
+    ];
     db_create_table($table_name, $table_spec);
-    $this->pass(format_string('Table %table created.', array('%table' => $table_name)));
+    $this->pass(format_string('Table %table created.', ['%table' => $table_name]));
 
     // Insert some rows to the table to test the handling of initial values.
     for ($i = 0; $i < 3; $i++) {
       db_insert($table_name)
-        ->useDefaults(array('serial_column'))
+        ->useDefaults(['serial_column'])
         ->execute();
     }
 
     db_add_field($table_name, 'test_field', $field_spec);
-    $this->pass(format_string('Column %column created.', array('%column' => 'test_field')));
+    $this->pass(format_string('Column %column created.', ['%column' => 'test_field']));
 
     // Check the characteristics of the field.
     $this->assertFieldCharacteristics($table_name, 'test_field', $field_spec);
@@ -614,7 +614,7 @@ protected function assertFieldCharacteristics($table_name, $field_name, $field_s
     if (isset($field_spec['initial'])) {
       // There should be no row with a value different then $field_spec['initial'].
       $count = db_select($table_name)
-        ->fields($table_name, array('serial_column'))
+        ->fields($table_name, ['serial_column'])
         ->condition($field_name, $field_spec['initial'], '<>')
         ->countQuery()
         ->execute()
@@ -627,7 +627,7 @@ protected function assertFieldCharacteristics($table_name, $field_name, $field_s
       // There should be no row with a value different than
       // $field_spec['initial_from_field'].
       $count = db_select($table_name)
-        ->fields($table_name, array('serial_column'))
+        ->fields($table_name, ['serial_column'])
         ->where($table_name . '.' . $field_spec['initial_from_field'] . ' <> ' . $table_name . '.' . $field_name)
         ->countQuery()
         ->execute()
@@ -639,10 +639,10 @@ protected function assertFieldCharacteristics($table_name, $field_name, $field_s
     if (isset($field_spec['default'])) {
       // Try inserting a row, and check the resulting value of the new column.
       $id = db_insert($table_name)
-        ->useDefaults(array('serial_column'))
+        ->useDefaults(['serial_column'])
         ->execute();
       $field_value = db_select($table_name)
-        ->fields($table_name, array($field_name))
+        ->fields($table_name, [$field_name])
         ->condition('serial_column', $id)
         ->execute()
         ->fetchField();
@@ -654,14 +654,14 @@ protected function assertFieldCharacteristics($table_name, $field_name, $field_s
    * Tests changing columns between types.
    */
   function testSchemaChangeField() {
-    $field_specs = array(
-      array('type' => 'int', 'size' => 'normal', 'not null' => FALSE),
-      array('type' => 'int', 'size' => 'normal', 'not null' => TRUE, 'initial' => 1, 'default' => 17),
-      array('type' => 'float', 'size' => 'normal', 'not null' => FALSE),
-      array('type' => 'float', 'size' => 'normal', 'not null' => TRUE, 'initial' => 1, 'default' => 7.3),
-      array('type' => 'numeric', 'scale' => 2, 'precision' => 10, 'not null' => FALSE),
-      array('type' => 'numeric', 'scale' => 2, 'precision' => 10, 'not null' => TRUE, 'initial' => 1, 'default' => 7),
-    );
+    $field_specs = [
+      ['type' => 'int', 'size' => 'normal', 'not null' => FALSE],
+      ['type' => 'int', 'size' => 'normal', 'not null' => TRUE, 'initial' => 1, 'default' => 17],
+      ['type' => 'float', 'size' => 'normal', 'not null' => FALSE],
+      ['type' => 'float', 'size' => 'normal', 'not null' => TRUE, 'initial' => 1, 'default' => 7.3],
+      ['type' => 'numeric', 'scale' => 2, 'precision' => 10, 'not null' => FALSE],
+      ['type' => 'numeric', 'scale' => 2, 'precision' => 10, 'not null' => TRUE, 'initial' => 1, 'default' => 7],
+    ];
 
     foreach ($field_specs as $i => $old_spec) {
       foreach ($field_specs as $j => $new_spec) {
@@ -673,12 +673,12 @@ function testSchemaChangeField() {
       }
     }
 
-    $field_specs = array(
-      array('type' => 'varchar_ascii', 'length' => '255'),
-      array('type' => 'varchar', 'length' => '255'),
-      array('type' => 'text'),
-      array('type' => 'blob', 'size' => 'big'),
-    );
+    $field_specs = [
+      ['type' => 'varchar_ascii', 'length' => '255'],
+      ['type' => 'varchar', 'length' => '255'],
+      ['type' => 'text'],
+      ['type' => 'blob', 'size' => 'big'],
+    ];
 
     foreach ($field_specs as $i => $old_spec) {
       foreach ($field_specs as $j => $new_spec) {
@@ -705,15 +705,15 @@ function testSchemaChangeField() {
    */
   protected function assertFieldChange($old_spec, $new_spec, $test_data = NULL) {
     $table_name = 'test_table_' . ($this->counter++);
-    $table_spec = array(
-      'fields' => array(
-        'serial_column' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE),
+    $table_spec = [
+      'fields' => [
+        'serial_column' => ['type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE],
         'test_field' => $old_spec,
-      ),
-      'primary key' => array('serial_column'),
-    );
+      ],
+      'primary key' => ['serial_column'],
+    ];
     db_create_table($table_name, $table_spec);
-    $this->pass(format_string('Table %table created.', array('%table' => $table_name)));
+    $this->pass(format_string('Table %table created.', ['%table' => $table_name]));
 
     // Check the characteristics of the field.
     $this->assertFieldCharacteristics($table_name, 'test_field', $old_spec);
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SelectComplexTest.php b/core/tests/Drupal/KernelTests/Core/Database/SelectComplexTest.php
index f10710053e7cab5a5e0b9621f90b6363a084d3b1..94ee755ab2f97bfbd275856104e2cfe6fbfc787f 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SelectComplexTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SelectComplexTest.php
@@ -19,7 +19,7 @@ class SelectComplexTest extends DatabaseTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'node_access_test', 'field');
+  public static $modules = ['system', 'user', 'node_access_test', 'field'];
 
   /**
    * Tests simple JOIN statements.
@@ -83,7 +83,7 @@ function testGroupBy() {
 
     $num_records = 0;
     $last_count = 0;
-    $records = array();
+    $records = [];
     foreach ($result as $record) {
       $num_records++;
       $this->assertTrue($record->$count_field >= $last_count, 'Results returned in correct order.');
@@ -91,16 +91,16 @@ function testGroupBy() {
       $records[$record->$task_field] = $record->$count_field;
     }
 
-    $correct_results = array(
+    $correct_results = [
       'eat' => 1,
       'sleep' => 2,
       'code' => 1,
       'found new band' => 1,
       'perform at superbowl' => 1,
-    );
+    ];
 
     foreach ($correct_results as $task => $count) {
-      $this->assertEqual($records[$task], $count, format_string("Correct number of '@task' records found.", array('@task' => $task)));
+      $this->assertEqual($records[$task], $count, format_string("Correct number of '@task' records found.", ['@task' => $task]));
     }
 
     $this->assertEqual($num_records, 6, 'Returned the correct number of total rows.');
@@ -120,7 +120,7 @@ function testGroupByAndHaving() {
 
     $num_records = 0;
     $last_count = 0;
-    $records = array();
+    $records = [];
     foreach ($result as $record) {
       $num_records++;
       $this->assertTrue($record->$count_field >= 2, 'Record has the minimum count.');
@@ -129,12 +129,12 @@ function testGroupByAndHaving() {
       $records[$record->$task_field] = $record->$count_field;
     }
 
-    $correct_results = array(
+    $correct_results = [
       'sleep' => 2,
-    );
+    ];
 
     foreach ($correct_results as $task => $count) {
-      $this->assertEqual($records[$task], $count, format_string("Correct number of '@task' records found.", array('@task' => $task)));
+      $this->assertEqual($records[$task], $count, format_string("Correct number of '@task' records found.", ['@task' => $task]));
     }
 
     $this->assertEqual($num_records, 1, 'Returned the correct number of total rows.');
@@ -256,7 +256,7 @@ function testCountQueryFieldRemovals() {
     // number of records, which in this case happens to be 4 (there are four
     // records in the {test} table).
     $query = db_select('test');
-    $query->fields('test', array('fail'));
+    $query->fields('test', ['fail']);
     $this->assertEqual(4, $query->countQuery()->execute()->fetchField(), 'Count Query removed fields');
 
     $query = db_select('test');
@@ -344,7 +344,7 @@ function testJoinSubquery() {
       'mail' => $this->randomMachineName() . '@example.com',
     ]);
 
-    $query = db_select('test_task', 'tt', array('target' => 'replica'));
+    $query = db_select('test_task', 'tt', ['target' => 'replica']);
     $query->addExpression('tt.pid + 1', 'abc');
     $query->condition('priority', 1, '>');
     $query->condition('priority', 100, '<');
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SelectOrderedTest.php b/core/tests/Drupal/KernelTests/Core/Database/SelectOrderedTest.php
index c9e199be902208624994be6a4b62c66d046b2823..53a311c6ca9cc434edbcfd4e14bd497119175158 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SelectOrderedTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SelectOrderedTest.php
@@ -43,12 +43,12 @@ function testSimpleSelectMultiOrdered() {
     $result = $query->execute();
 
     $num_records = 0;
-    $expected = array(
-      array('Ringo', 28, 'Drummer'),
-      array('John', 25, 'Singer'),
-      array('George', 27, 'Singer'),
-      array('Paul', 26, 'Songwriter'),
-    );
+    $expected = [
+      ['Ringo', 28, 'Drummer'],
+      ['John', 25, 'Singer'],
+      ['George', 27, 'Singer'],
+      ['Paul', 26, 'Songwriter'],
+    ];
     $results = $result->fetchAll(\PDO::FETCH_NUM);
     foreach ($expected as $k => $record) {
       $num_records++;
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SelectSubqueryTest.php b/core/tests/Drupal/KernelTests/Core/Database/SelectSubqueryTest.php
index 98849bbaaab3cba1f7600b1133dd4517fdf6337e..d5f02375f3e757d3906f0858ea2531ee8969a32f 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SelectSubqueryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SelectSubqueryTest.php
@@ -210,18 +210,18 @@ function testJoinSubquerySelect() {
   function testExistsSubquerySelect() {
     // Put George into {test_people}.
     db_insert('test_people')
-      ->fields(array(
+      ->fields([
         'name' => 'George',
         'age' => 27,
         'job' => 'Singer',
-      ))
+      ])
       ->execute();
     // Base query to {test}.
     $query = db_select('test', 't')
-      ->fields('t', array('name'));
+      ->fields('t', ['name']);
     // Subquery to {test_people}.
     $subquery = db_select('test_people', 'tp')
-      ->fields('tp', array('name'))
+      ->fields('tp', ['name'])
       ->where('tp.name = t.name');
     $query->exists($subquery);
     $result = $query->execute();
@@ -240,19 +240,19 @@ function testExistsSubquerySelect() {
   function testNotExistsSubquerySelect() {
     // Put George into {test_people}.
     db_insert('test_people')
-      ->fields(array(
+      ->fields([
         'name' => 'George',
         'age' => 27,
         'job' => 'Singer',
-      ))
+      ])
       ->execute();
 
     // Base query to {test}.
     $query = db_select('test', 't')
-      ->fields('t', array('name'));
+      ->fields('t', ['name']);
     // Subquery to {test_people}.
     $subquery = db_select('test_people', 'tp')
-      ->fields('tp', array('name'))
+      ->fields('tp', ['name'])
       ->where('tp.name = t.name');
     $query->notExists($subquery);
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SelectTest.php b/core/tests/Drupal/KernelTests/Core/Database/SelectTest.php
index b3eef5463018bfe44fdf316536b5f2164282c4cc..038224e9c0ce27c6b6c1a914337977e4f5755c4c 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SelectTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SelectTest.php
@@ -163,7 +163,7 @@ function testSimpleSelectExpressionMultiple() {
    */
   function testSimpleSelectMultipleFields() {
     $record = db_select('test')
-      ->fields('test', array('id', 'name', 'age', 'job'))
+      ->fields('test', ['id', 'name', 'age', 'job'])
       ->condition('age', 27)
       ->execute()->fetchObject();
 
@@ -211,7 +211,7 @@ function testNullCondition() {
     $this->ensureSampleDataNull();
 
     $names = db_select('test_null', 'tn')
-      ->fields('tn', array('name'))
+      ->fields('tn', ['name'])
       ->condition('age', NULL)
       ->execute()->fetchCol();
 
@@ -225,7 +225,7 @@ function testIsNullCondition() {
     $this->ensureSampleDataNull();
 
     $names = db_select('test_null', 'tn')
-      ->fields('tn', array('name'))
+      ->fields('tn', ['name'])
       ->isNull('age')
       ->execute()->fetchCol();
 
@@ -240,7 +240,7 @@ function testIsNotNullCondition() {
     $this->ensureSampleDataNull();
 
     $names = db_select('test_null', 'tn')
-      ->fields('tn', array('name'))
+      ->fields('tn', ['name'])
       ->isNotNull('tn.age')
       ->orderBy('name')
       ->execute()->fetchCol();
@@ -258,11 +258,11 @@ function testIsNotNullCondition() {
    */
   function testUnion() {
     $query_1 = db_select('test', 't')
-      ->fields('t', array('name'))
-      ->condition('age', array(27, 28), 'IN');
+      ->fields('t', ['name'])
+      ->condition('age', [27, 28], 'IN');
 
     $query_2 = db_select('test', 't')
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->condition('age', 28);
 
     $query_1->union($query_2);
@@ -281,11 +281,11 @@ function testUnion() {
    */
   function testUnionAll() {
     $query_1 = db_select('test', 't')
-      ->fields('t', array('name'))
-      ->condition('age', array(27, 28), 'IN');
+      ->fields('t', ['name'])
+      ->condition('age', [27, 28], 'IN');
 
     $query_2 = db_select('test', 't')
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->condition('age', 28);
 
     $query_1->union($query_2, 'ALL');
@@ -305,11 +305,11 @@ function testUnionAll() {
    */
   function testUnionCount() {
     $query_1 = db_select('test', 't')
-      ->fields('t', array('name', 'age'))
-      ->condition('age', array(27, 28), 'IN');
+      ->fields('t', ['name', 'age'])
+      ->condition('age', [27, 28], 'IN');
 
     $query_2 = db_select('test', 't')
-      ->fields('t', array('name', 'age'))
+      ->fields('t', ['name', 'age'])
       ->condition('age', 28);
 
     $query_1->union($query_2, 'ALL');
@@ -328,12 +328,12 @@ function testUnionCount() {
   function testUnionOrder() {
     // This gives George and Ringo.
     $query_1 = db_select('test', 't')
-      ->fields('t', array('name'))
-      ->condition('age', array(27, 28), 'IN');
+      ->fields('t', ['name'])
+      ->condition('age', [27, 28], 'IN');
 
     // This gives Paul.
     $query_2 = db_select('test', 't')
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->condition('age', 26);
 
     $query_1->union($query_2);
@@ -357,12 +357,12 @@ function testUnionOrder() {
   function testUnionOrderLimit() {
     // This gives George and Ringo.
     $query_1 = db_select('test', 't')
-      ->fields('t', array('name'))
-      ->condition('age', array(27, 28), 'IN');
+      ->fields('t', ['name'])
+      ->condition('age', [27, 28], 'IN');
 
     // This gives Paul.
     $query_2 = db_select('test', 't')
-      ->fields('t', array('name'))
+      ->fields('t', ['name'])
       ->condition('age', 26);
 
     $query_1->union($query_2);
@@ -401,13 +401,13 @@ function testRandomOrder() {
     // after shuffling it (in other words, nearly impossible).
     $number_of_items = 52;
     while (db_query("SELECT MAX(id) FROM {test}")->fetchField() < $number_of_items) {
-      db_insert('test')->fields(array('name' => $this->randomMachineName()))->execute();
+      db_insert('test')->fields(['name' => $this->randomMachineName()])->execute();
     }
 
     // First select the items in order and make sure we get an ordered list.
     $expected_ids = range(1, $number_of_items);
     $ordered_ids = db_select('test', 't')
-      ->fields('t', array('id'))
+      ->fields('t', ['id'])
       ->range(0, $number_of_items)
       ->orderBy('id')
       ->execute()
@@ -418,7 +418,7 @@ function testRandomOrder() {
     // expect this to contain a differently ordered version of the original
     // result.
     $randomized_ids = db_select('test', 't')
-      ->fields('t', array('id'))
+      ->fields('t', ['id'])
       ->range(0, $number_of_items)
       ->orderRandom()
       ->execute()
@@ -431,7 +431,7 @@ function testRandomOrder() {
     // Now perform the exact same query again, and make sure the order is
     // different.
     $randomized_ids_second_set = db_select('test', 't')
-      ->fields('t', array('id'))
+      ->fields('t', ['id'])
       ->range(0, $number_of_items)
       ->orderRandom()
       ->execute()
@@ -447,24 +447,24 @@ function testRandomOrder() {
    */
   public function testRegexCondition() {
 
-    $test_groups[] = array(
+    $test_groups[] = [
       'regex' => 'hn$',
-      'expected' => array(
+      'expected' => [
         'John',
-      ),
-    );
-    $test_groups[] = array(
+      ],
+    ];
+    $test_groups[] = [
       'regex' => '^Pau',
-      'expected' => array(
+      'expected' => [
         'Paul',
-      ),
-    );
-    $test_groups[] = array(
+      ],
+    ];
+    $test_groups[] = [
       'regex' => 'Ringo|George',
-      'expected' => array(
+      'expected' => [
         'Ringo', 'George',
-      ),
-    );
+      ],
+    ];
 
 
     $database = $this->container->get('database');
@@ -480,25 +480,25 @@ public function testRegexCondition() {
 
     // Ensure that filter by "#" still works due to the quoting.
     $database->insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'Pete',
         'age' => 26,
         'job' => '#Drummer',
-      ))
+      ])
       ->execute();
 
-    $test_groups = array();
-    $test_groups[] = array(
+    $test_groups = [];
+    $test_groups[] = [
       'regex' => '#Drummer',
-      'expected' => array(
+      'expected' => [
         'Pete',
-      ),
-    );
-    $test_groups[] = array(
+      ],
+    ];
+    $test_groups[] = [
       'regex' => '#Singer',
-      'expected' => array(
-      ),
-    );
+      'expected' => [
+      ],
+    ];
 
     foreach ($test_groups as $test_group) {
       $query = $database->select('test', 't');
@@ -570,7 +570,7 @@ function testEmptyInCondition() {
     try {
       db_select('test', 't')
         ->fields('t')
-        ->condition('age', array(), 'IN')
+        ->condition('age', [], 'IN')
         ->execute();
 
       $this->fail('Expected exception not thrown');
@@ -582,7 +582,7 @@ function testEmptyInCondition() {
     try {
       db_select('test', 't')
         ->fields('t')
-        ->condition('age', array(), 'NOT IN')
+        ->condition('age', [], 'NOT IN')
         ->execute();
 
       $this->fail('Expected exception not thrown');
diff --git a/core/tests/Drupal/KernelTests/Core/Database/TaggingTest.php b/core/tests/Drupal/KernelTests/Core/Database/TaggingTest.php
index 611b2460b71d0d086c3cd4264532b95755cc5ca3..0f9f6d463b69e6f6342262a61c31db1d43e5516b 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/TaggingTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/TaggingTest.php
@@ -111,10 +111,10 @@ function testMetaData() {
     $query->addField('test', 'name');
     $query->addField('test', 'age', 'age');
 
-    $data = array(
+    $data = [
       'a' => 'A',
       'b' => 'B',
-    );
+    ];
 
     $query->addMetaData('test', $data);
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/TransactionTest.php b/core/tests/Drupal/KernelTests/Core/Database/TransactionTest.php
index d060f4de7ae002a9f4f4b88a4c18c5c2f1f0a47c..862b3e646b5613c35c822e2e848ec4350d7166f5 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/TransactionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/TransactionTest.php
@@ -58,10 +58,10 @@ protected function transactionOuterLayer($suffix, $rollback = FALSE, $ddl_statem
 
     // Insert a single row into the testing table.
     db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'David' . $suffix,
         'age' => '24',
-      ))
+      ])
       ->execute();
 
     $this->assertTrue($connection->inTransaction(), 'In transaction before calling nested transaction.');
@@ -108,25 +108,25 @@ protected function transactionInnerLayer($suffix, $rollback = FALSE, $ddl_statem
 
     // Insert a single row into the testing table.
     db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'Daniel' . $suffix,
         'age' => '19',
-      ))
+      ])
       ->execute();
 
     $this->assertTrue($connection->inTransaction(), 'In transaction inside nested transaction.');
 
     if ($ddl_statement) {
-      $table = array(
-        'fields' => array(
-          'id' => array(
+      $table = [
+        'fields' => [
+          'id' => [
             'type' => 'serial',
             'unsigned' => TRUE,
             'not null' => TRUE,
-          ),
-        ),
-        'primary key' => array('id'),
-      );
+          ],
+        ],
+        'primary key' => ['id'],
+      ];
       db_create_table('database_test_1', $table);
 
       $this->assertTrue($connection->inTransaction(), 'In transaction inside nested transaction.');
@@ -157,9 +157,9 @@ function testTransactionRollBackSupported() {
 
       // Neither of the rows we inserted in the two transaction layers
       // should be present in the tables post-rollback.
-      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'DavidB'))->fetchField();
+      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'DavidB'])->fetchField();
       $this->assertNotIdentical($saved_age, '24', 'Cannot retrieve DavidB row after commit.');
-      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'DanielB'))->fetchField();
+      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'DanielB'])->fetchField();
       $this->assertNotIdentical($saved_age, '19', 'Cannot retrieve DanielB row after commit.');
     }
     catch (\Exception $e) {
@@ -183,9 +183,9 @@ function testTransactionRollBackNotSupported() {
 
       // Because our current database claims to not support transactions,
       // the inserted rows should be present despite the attempt to roll back.
-      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'DavidB'))->fetchField();
+      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'DavidB'])->fetchField();
       $this->assertIdentical($saved_age, '24', 'DavidB not rolled back, since transactions are not supported.');
-      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'DanielB'))->fetchField();
+      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'DanielB'])->fetchField();
       $this->assertIdentical($saved_age, '19', 'DanielB not rolled back, since transactions are not supported.');
     }
     catch (\Exception $e) {
@@ -205,9 +205,9 @@ function testCommittedTransaction() {
       $this->transactionOuterLayer('A');
 
       // Because we committed, both of the inserted rows should be present.
-      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'DavidA'))->fetchField();
+      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'DavidA'])->fetchField();
       $this->assertIdentical($saved_age, '24', 'Can retrieve DavidA row after commit.');
-      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'DanielA'))->fetchField();
+      $saved_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'DanielA'])->fetchField();
       $this->assertIdentical($saved_age, '19', 'Can retrieve DanielA row after commit.');
     }
     catch (\Exception $e) {
@@ -311,9 +311,9 @@ function testTransactionWithDdlStatement() {
    */
   protected function insertRow($name) {
     db_insert('test')
-      ->fields(array(
+      ->fields([
         'name' => $name,
-      ))
+      ])
       ->execute();
   }
 
@@ -322,16 +322,16 @@ protected function insertRow($name) {
    */
   protected function executeDDLStatement() {
     static $count = 0;
-    $table = array(
-      'fields' => array(
-        'id' => array(
+    $table = [
+      'fields' => [
+        'id' => [
           'type' => 'serial',
           'unsigned' => TRUE,
           'not null' => TRUE,
-        ),
-      ),
-      'primary key' => array('id'),
-    );
+        ],
+      ],
+      'primary key' => ['id'],
+    ];
     db_create_table('database_test_' . ++$count, $table);
   }
 
@@ -353,9 +353,9 @@ protected function cleanUp() {
    */
   function assertRowPresent($name, $message = NULL) {
     if (!isset($message)) {
-      $message = format_string('Row %name is present.', array('%name' => $name));
+      $message = format_string('Row %name is present.', ['%name' => $name]);
     }
-    $present = (boolean) db_query('SELECT 1 FROM {test} WHERE name = :name', array(':name' => $name))->fetchField();
+    $present = (boolean) db_query('SELECT 1 FROM {test} WHERE name = :name', [':name' => $name])->fetchField();
     return $this->assertTrue($present, $message);
   }
 
@@ -369,9 +369,9 @@ function assertRowPresent($name, $message = NULL) {
    */
   function assertRowAbsent($name, $message = NULL) {
     if (!isset($message)) {
-      $message = format_string('Row %name is absent.', array('%name' => $name));
+      $message = format_string('Row %name is absent.', ['%name' => $name]);
     }
-    $present = (boolean) db_query('SELECT 1 FROM {test} WHERE name = :name', array(':name' => $name))->fetchField();
+    $present = (boolean) db_query('SELECT 1 FROM {test} WHERE name = :name', [':name' => $name])->fetchField();
     return $this->assertFalse($present, $message);
   }
 
@@ -498,7 +498,7 @@ public function testQueryFailureInTransaction() {
 
     // Test a failed query using the query() method.
     try {
-      $connection->query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'David'))->fetchField();
+      $connection->query('SELECT age FROM {test} WHERE name = :name', [':name' => 'David'])->fetchField();
       $this->fail('Using the query method failed.');
     }
     catch (\Exception $e) {
@@ -594,16 +594,16 @@ public function testQueryFailureInTransaction() {
     // Create the missing schema and insert a row.
     $this->installSchema('database_test', ['test']);
     $connection->insert('test')
-      ->fields(array(
+      ->fields([
         'name' => 'David',
         'age' => '24',
-      ))
+      ])
       ->execute();
 
     // Commit the transaction.
     unset($transaction);
 
-    $saved_age = $connection->query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'David'))->fetchField();
+    $saved_age = $connection->query('SELECT age FROM {test} WHERE name = :name', [':name' => 'David'])->fetchField();
     $this->assertEqual('24', $saved_age);
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/UpdateComplexTest.php b/core/tests/Drupal/KernelTests/Core/Database/UpdateComplexTest.php
index e4289e6187f60730c594460ee2b27ec51c6e2e84..85521b1cc0bc79e5bdc3775ee8d04de93a2608a4 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/UpdateComplexTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/UpdateComplexTest.php
@@ -16,7 +16,7 @@ class UpdateComplexTest extends DatabaseTestBase {
    */
   function testOrConditionUpdate() {
     $update = db_update('test')
-      ->fields(array('job' => 'Musician'))
+      ->fields(['job' => 'Musician'])
       ->condition((new Condition('OR'))
         ->condition('name', 'John')
         ->condition('name', 'Paul')
@@ -24,7 +24,7 @@ function testOrConditionUpdate() {
     $num_updated = $update->execute();
     $this->assertIdentical($num_updated, 2, 'Updated 2 records.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '2', 'Updated fields successfully.');
   }
 
@@ -33,12 +33,12 @@ function testOrConditionUpdate() {
    */
   function testInConditionUpdate() {
     $num_updated = db_update('test')
-      ->fields(array('job' => 'Musician'))
-      ->condition('name', array('John', 'Paul'), 'IN')
+      ->fields(['job' => 'Musician'])
+      ->condition('name', ['John', 'Paul'], 'IN')
       ->execute();
     $this->assertIdentical($num_updated, 2, 'Updated 2 records.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '2', 'Updated fields successfully.');
   }
 
@@ -49,12 +49,12 @@ function testNotInConditionUpdate() {
     // The o is lowercase in the 'NoT IN' operator, to make sure the operators
     // work in mixed case.
     $num_updated = db_update('test')
-      ->fields(array('job' => 'Musician'))
-      ->condition('name', array('John', 'Paul', 'George'), 'NoT IN')
+      ->fields(['job' => 'Musician'])
+      ->condition('name', ['John', 'Paul', 'George'], 'NoT IN')
       ->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '1', 'Updated fields successfully.');
   }
 
@@ -63,12 +63,12 @@ function testNotInConditionUpdate() {
    */
   function testBetweenConditionUpdate() {
     $num_updated = db_update('test')
-      ->fields(array('job' => 'Musician'))
-      ->condition('age', array(25, 26), 'BETWEEN')
+      ->fields(['job' => 'Musician'])
+      ->condition('age', [25, 26], 'BETWEEN')
       ->execute();
     $this->assertIdentical($num_updated, 2, 'Updated 2 records.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '2', 'Updated fields successfully.');
   }
 
@@ -77,12 +77,12 @@ function testBetweenConditionUpdate() {
    */
   function testLikeConditionUpdate() {
     $num_updated = db_update('test')
-      ->fields(array('job' => 'Musician'))
+      ->fields(['job' => 'Musician'])
       ->condition('name', '%ge%', 'LIKE')
       ->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '1', 'Updated fields successfully.');
   }
 
@@ -90,18 +90,18 @@ function testLikeConditionUpdate() {
    * Tests UPDATE with expression values.
    */
   function testUpdateExpression() {
-    $before_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'))->fetchField();
+    $before_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'])->fetchField();
     $num_updated = db_update('test')
       ->condition('name', 'Ringo')
-      ->fields(array('job' => 'Musician'))
-      ->expression('age', 'age + :age', array(':age' => 4))
+      ->fields(['job' => 'Musician'])
+      ->expression('age', 'age + :age', [':age' => 4])
       ->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '1', 'Updated fields successfully.');
 
-    $person = db_query('SELECT * FROM {test} WHERE name = :name', array(':name' => 'Ringo'))->fetch();
+    $person = db_query('SELECT * FROM {test} WHERE name = :name', [':name' => 'Ringo'])->fetch();
     $this->assertEqual($person->name, 'Ringo', 'Name set correctly.');
     $this->assertEqual($person->age, $before_age + 4, 'Age set correctly.');
     $this->assertEqual($person->job, 'Musician', 'Job set correctly.');
@@ -111,14 +111,14 @@ function testUpdateExpression() {
    * Tests UPDATE with only expression values.
    */
   function testUpdateOnlyExpression() {
-    $before_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'))->fetchField();
+    $before_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'])->fetchField();
     $num_updated = db_update('test')
       ->condition('name', 'Ringo')
-      ->expression('age', 'age + :age', array(':age' => 4))
+      ->expression('age', 'age + :age', [':age' => 4])
       ->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
 
-    $after_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'))->fetchField();
+    $after_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'])->fetchField();
     $this->assertEqual($before_age + 4, $after_age, 'Age updated correctly');
   }
 
@@ -127,7 +127,7 @@ function testUpdateOnlyExpression() {
    */
   function testSubSelectUpdate() {
     $subselect = db_select('test_task', 't');
-    $subselect->addExpression('MAX(priority) + :increment', 'max_priority', array(':increment' => 30));
+    $subselect->addExpression('MAX(priority) + :increment', 'max_priority', [':increment' => 30]);
     // Clone this to make sure we are running a different query when
     // asserting.
     $select = clone $subselect;
@@ -136,7 +136,7 @@ function testSubSelectUpdate() {
       ->condition('name', 'Ringo');
     // Save the number of rows that updated for assertion later.
     $num_updated = $query->execute();
-    $after_age = db_query('SELECT age FROM {test} WHERE name = :name', array(':name' => 'Ringo'))->fetchField();
+    $after_age = db_query('SELECT age FROM {test} WHERE name = :name', [':name' => 'Ringo'])->fetchField();
     $expected_age = $select->execute()->fetchField();
     $this->assertEqual($after_age, $expected_age);
     $this->assertEqual(1, $num_updated, t('Expected 1 row to be updated in subselect update query.'));
diff --git a/core/tests/Drupal/KernelTests/Core/Database/UpdateLobTest.php b/core/tests/Drupal/KernelTests/Core/Database/UpdateLobTest.php
index 57a141835d2e563b2cde95ad70d59223388f5e73..cee2c958adc599cacf160296d652d00e5939d5d5 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/UpdateLobTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/UpdateLobTest.php
@@ -16,17 +16,17 @@ function testUpdateOneBlob() {
     $data = "This is\000a test.";
     $this->assertTrue(strlen($data) === 15, 'Test data contains a NULL.');
     $id = db_insert('test_one_blob')
-      ->fields(array('blob1' => $data))
+      ->fields(['blob1' => $data])
       ->execute();
 
     $data .= $data;
     db_update('test_one_blob')
       ->condition('id', $id)
-      ->fields(array('blob1' => $data))
+      ->fields(['blob1' => $data])
       ->execute();
 
-    $r = db_query('SELECT * FROM {test_one_blob} WHERE id = :id', array(':id' => $id))->fetchAssoc();
-    $this->assertTrue($r['blob1'] === $data, format_string('Can update a blob: id @id, @data.', array('@id' => $id, '@data' => serialize($r))));
+    $r = db_query('SELECT * FROM {test_one_blob} WHERE id = :id', [':id' => $id])->fetchAssoc();
+    $this->assertTrue($r['blob1'] === $data, format_string('Can update a blob: id @id, @data.', ['@id' => $id, '@data' => serialize($r)]));
   }
 
   /**
@@ -34,18 +34,18 @@ function testUpdateOneBlob() {
    */
   function testUpdateMultipleBlob() {
     $id = db_insert('test_two_blobs')
-      ->fields(array(
+      ->fields([
         'blob1' => 'This is',
         'blob2' => 'a test',
-      ))
+      ])
       ->execute();
 
     db_update('test_two_blobs')
       ->condition('id', $id)
-      ->fields(array('blob1' => 'and so', 'blob2' => 'is this'))
+      ->fields(['blob1' => 'and so', 'blob2' => 'is this'])
       ->execute();
 
-    $r = db_query('SELECT * FROM {test_two_blobs} WHERE id = :id', array(':id' => $id))->fetchAssoc();
+    $r = db_query('SELECT * FROM {test_two_blobs} WHERE id = :id', [':id' => $id])->fetchAssoc();
     $this->assertTrue($r['blob1'] === 'and so' && $r['blob2'] === 'is this', 'Can update multiple blobs per row.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/UpdateTest.php b/core/tests/Drupal/KernelTests/Core/Database/UpdateTest.php
index 25ad3cbac6c0894dd1280bb5a03009395fbc378e..aef6e866ebb675a526853ed56364cde3ce735b94 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/UpdateTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/UpdateTest.php
@@ -14,12 +14,12 @@ class UpdateTest extends DatabaseTestBase {
    */
   function testSimpleUpdate() {
     $num_updated = db_update('test')
-      ->fields(array('name' => 'Tiffany'))
+      ->fields(['name' => 'Tiffany'])
       ->condition('id', 1)
       ->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
 
-    $saved_name = db_query('SELECT name FROM {test} WHERE id = :id', array(':id' => 1))->fetchField();
+    $saved_name = db_query('SELECT name FROM {test} WHERE id = :id', [':id' => 1])->fetchField();
     $this->assertIdentical($saved_name, 'Tiffany', 'Updated name successfully.');
   }
 
@@ -29,12 +29,12 @@ function testSimpleUpdate() {
   function testSimpleNullUpdate() {
     $this->ensureSampleDataNull();
     $num_updated = db_update('test_null')
-      ->fields(array('age' => NULL))
+      ->fields(['age' => NULL])
       ->condition('name', 'Kermit')
       ->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
 
-    $saved_age = db_query('SELECT age FROM {test_null} WHERE name = :name', array(':name' => 'Kermit'))->fetchField();
+    $saved_age = db_query('SELECT age FROM {test_null} WHERE name = :name', [':name' => 'Kermit'])->fetchField();
     $this->assertNull($saved_age, 'Updated name successfully.');
   }
 
@@ -43,12 +43,12 @@ function testSimpleNullUpdate() {
    */
   function testMultiUpdate() {
     $num_updated = db_update('test')
-      ->fields(array('job' => 'Musician'))
+      ->fields(['job' => 'Musician'])
       ->condition('job', 'Singer')
       ->execute();
     $this->assertIdentical($num_updated, 2, 'Updated 2 records.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '2', 'Updated fields successfully.');
   }
 
@@ -57,12 +57,12 @@ function testMultiUpdate() {
    */
   function testMultiGTUpdate() {
     $num_updated = db_update('test')
-      ->fields(array('job' => 'Musician'))
+      ->fields(['job' => 'Musician'])
       ->condition('age', 26, '>')
       ->execute();
     $this->assertIdentical($num_updated, 2, 'Updated 2 records.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '2', 'Updated fields successfully.');
   }
 
@@ -71,12 +71,12 @@ function testMultiGTUpdate() {
    */
   function testWhereUpdate() {
     $num_updated = db_update('test')
-      ->fields(array('job' => 'Musician'))
-      ->where('age > :age', array(':age' => 26))
+      ->fields(['job' => 'Musician'])
+      ->where('age > :age', [':age' => 26])
       ->execute();
     $this->assertIdentical($num_updated, 2, 'Updated 2 records.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '2', 'Updated fields successfully.');
   }
 
@@ -85,13 +85,13 @@ function testWhereUpdate() {
    */
   function testWhereAndConditionUpdate() {
     $update = db_update('test')
-      ->fields(array('job' => 'Musician'))
-      ->where('age > :age', array(':age' => 26))
+      ->fields(['job' => 'Musician'])
+      ->where('age > :age', [':age' => 26])
       ->condition('name', 'Ringo');
     $num_updated = $update->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
 
-    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', array(':job' => 'Musician'))->fetchField();
+    $num_matches = db_query('SELECT COUNT(*) FROM {test} WHERE job = :job', [':job' => 'Musician'])->fetchField();
     $this->assertIdentical($num_matches, '1', 'Updated fields successfully.');
   }
 
@@ -106,7 +106,7 @@ function testExpressionUpdate() {
       ->execute();
     $this->assertIdentical($num_rows, 4, 'Updated 4 records.');
 
-    $saved_name = db_query('SELECT name FROM {test} WHERE age = :age', array(':age' => pow(26, 2)))->fetchField();
+    $saved_name = db_query('SELECT name FROM {test} WHERE age = :age', [':age' => pow(26, 2)])->fetchField();
     $this->assertIdentical($saved_name, 'Paul', 'Successfully updated values using an algebraic expression.');
   }
 
@@ -122,7 +122,7 @@ function testUpdateAffectedRows() {
     // because that's cross-db expected behavior.
     $num_rows = db_update('test_task')
       ->condition('priority', 1, '<>')
-      ->fields(array('task' => 'sleep'))
+      ->fields(['task' => 'sleep'])
       ->execute();
     $this->assertIdentical($num_rows, 5, 'Correctly returned 5 affected rows.');
   }
@@ -132,12 +132,12 @@ function testUpdateAffectedRows() {
    */
   function testPrimaryKeyUpdate() {
     $num_updated = db_update('test')
-      ->fields(array('id' => 42, 'name' => 'John'))
+      ->fields(['id' => 42, 'name' => 'John'])
       ->condition('id', 1)
       ->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
 
-    $saved_name = db_query('SELECT name FROM {test} WHERE id = :id', array(':id' => 42))->fetchField();
+    $saved_name = db_query('SELECT name FROM {test} WHERE id = :id', [':id' => 42])->fetchField();
     $this->assertIdentical($saved_name, 'John', 'Updated primary key successfully.');
   }
 
@@ -146,12 +146,12 @@ function testPrimaryKeyUpdate() {
    */
   function testSpecialColumnUpdate() {
     $num_updated = db_update('test_special_columns')
-      ->fields(array('offset' => 'New offset value'))
+      ->fields(['offset' => 'New offset value'])
       ->condition('id', 1)
       ->execute();
     $this->assertIdentical($num_updated, 1, 'Updated 1 special column record.');
 
-    $saved_value = db_query('SELECT "offset" FROM {test_special_columns} WHERE id = :id', array(':id' => 1))->fetchField();
+    $saved_value = db_query('SELECT "offset" FROM {test_special_columns} WHERE id = :id', [':id' => 1])->fetchField();
     $this->assertIdentical($saved_value, 'New offset value', 'Updated special column name value successfully.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/UpsertTest.php b/core/tests/Drupal/KernelTests/Core/Database/UpsertTest.php
index 9b8e167ebf04fbf62b682811a2ca6b25d5e3a6b5..5c62f87f6bad05521f851911045ffba9ef118899 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/UpsertTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/UpsertTest.php
@@ -42,12 +42,12 @@ public function testUpsert() {
     $num_records_after = $connection->query('SELECT COUNT(*) FROM {test_people}')->fetchField();
     $this->assertEqual($num_records_before + 1, $num_records_after, 'Rows were inserted and updated properly.');
 
-    $person = $connection->query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Presenter'))->fetch();
+    $person = $connection->query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Presenter'])->fetch();
     $this->assertEqual($person->job, 'Presenter', 'Job set correctly.');
     $this->assertEqual($person->age, 31, 'Age set correctly.');
     $this->assertEqual($person->name, 'Tiffany', 'Name set correctly.');
 
-    $person = $connection->query('SELECT * FROM {test_people} WHERE job = :job', array(':job' => 'Speaker'))->fetch();
+    $person = $connection->query('SELECT * FROM {test_people} WHERE job = :job', [':job' => 'Speaker'])->fetch();
     $this->assertEqual($person->job, 'Speaker', 'Job was not changed.');
     $this->assertEqual($person->age, 32, 'Age updated correctly.');
     $this->assertEqual($person->name, 'Meredith', 'Name was not changed.');
diff --git a/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php b/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
index 7778a5a4531376403aa88a04a86399f442f02acc..7370491816b526659a088f68d3325921cb4fbf8e 100644
--- a/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
+++ b/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
@@ -60,10 +60,10 @@ protected function getTestKernel(Request $request, array $modules_enabled = NULL
    */
   public function testCompileDIC() {
     // @todo: write a memory based storage backend for testing.
-    $modules_enabled = array(
+    $modules_enabled = [
       'system' => 'system',
       'user' => 'user',
-    );
+    ];
 
     $request = Request::createFromGlobals();
     $this->getTestKernel($request, $modules_enabled);
@@ -128,11 +128,11 @@ public function testCompileDIC() {
 
     // Check that the location of the new module is registered.
     $modules = $container->getParameter('container.modules');
-    $this->assertEqual($modules['service_provider_test'], array(
+    $this->assertEqual($modules['service_provider_test'], [
       'type' => 'module',
       'pathname' => drupal_get_filename('module', 'service_provider_test'),
       'filename' => NULL,
-    ));
+    ]);
 
     // Check that the container itself is not among the persist IDs because it
     // does not make sense to persist the container itself.
@@ -169,10 +169,10 @@ public function testRepeatedBootWithDifferentEnvironment() {
    */
   public function testPreventChangeOfSitePath() {
     // @todo: write a memory based storage backend for testing.
-    $modules_enabled = array(
+    $modules_enabled = [
       'system' => 'system',
       'user' => 'user',
-    );
+    ];
 
     $request = Request::createFromGlobals();
     $kernel = $this->getTestKernel($request, $modules_enabled);
diff --git a/core/tests/Drupal/KernelTests/Core/DrupalKernel/ServiceDestructionTest.php b/core/tests/Drupal/KernelTests/Core/DrupalKernel/ServiceDestructionTest.php
index f4fe09450f6e9a45ad4565b7cf1eef120ac9cfbc..1716280d5ee73c3bf96bb41abb4d1faf41ff90f4 100644
--- a/core/tests/Drupal/KernelTests/Core/DrupalKernel/ServiceDestructionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/DrupalKernel/ServiceDestructionTest.php
@@ -17,7 +17,7 @@ class ServiceDestructionTest extends KernelTestBase {
    */
   public function testDestructionUsed() {
     // Enable the test module to add it to the container.
-    $this->enableModules(array('service_provider_test'));
+    $this->enableModules(['service_provider_test']);
 
     $request = $this->container->get('request_stack')->getCurrentRequest();
     $kernel = $this->container->get('kernel');
@@ -39,7 +39,7 @@ public function testDestructionUsed() {
    */
   public function testDestructionUnused() {
     // Enable the test module to add it to the container.
-    $this->enableModules(array('service_provider_test'));
+    $this->enableModules(['service_provider_test']);
 
     $request = $this->container->get('request_stack')->getCurrentRequest();
     $kernel = $this->container->get('kernel');
diff --git a/core/tests/Drupal/KernelTests/Core/Element/PathElementFormTest.php b/core/tests/Drupal/KernelTests/Core/Element/PathElementFormTest.php
index ca4e5015c4872556a70cadef2f8c373e479b03f8..b5b9ffd5ec892bc883ddd0dea853dbeb97fc4021 100644
--- a/core/tests/Drupal/KernelTests/Core/Element/PathElementFormTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Element/PathElementFormTest.php
@@ -30,7 +30,7 @@ class PathElementFormTest extends KernelTestBase implements FormInterface {
    *
    * @var array
    */
-  public static $modules = array('system', 'user');
+  public static $modules = ['system', 'user'];
 
   /**
    * Sets up the test.
@@ -41,16 +41,16 @@ protected function setUp() {
     $this->installEntitySchema('user');
     \Drupal::service('router.builder')->rebuild();
     /** @var \Drupal\user\RoleInterface $role */
-    $role = Role::create(array(
+    $role = Role::create([
       'id' => 'admin',
       'label' => 'admin',
-    ));
+    ]);
     $role->grantPermission('link to any page');
     $role->save();
-    $this->testUser = User::create(array(
+    $this->testUser = User::create([
       'name' => 'foobar',
       'mail' => 'foobar@example.com',
-    ));
+    ]);
     $this->testUser->addRole($role->id());
     $this->testUser->save();
     \Drupal::service('current_user')->setAccount($this->testUser);
@@ -68,57 +68,57 @@ public function getFormId() {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     // A required validated path.
-    $form['required_validate'] = array(
+    $form['required_validate'] = [
       '#type' => 'path',
       '#required' => TRUE,
       '#title' => 'required_validate',
       '#convert_path' => PathElement::CONVERT_NONE,
-    );
+    ];
 
     // A non validated required path.
-    $form['required_non_validate'] = array(
+    $form['required_non_validate'] = [
       '#type' => 'path',
       '#required' => TRUE,
       '#title' => 'required_non_validate',
       '#convert_path' => PathElement::CONVERT_NONE,
       '#validate_path' => FALSE,
-    );
+    ];
 
     // A non required validated path.
-    $form['optional_validate'] = array(
+    $form['optional_validate'] = [
       '#type' => 'path',
       '#required' => FALSE,
       '#title' => 'optional_validate',
       '#convert_path' => PathElement::CONVERT_NONE,
-    );
+    ];
 
     // A non required converted path.
-    $form['optional_validate'] = array(
+    $form['optional_validate'] = [
       '#type' => 'path',
       '#required' => FALSE,
       '#title' => 'optional_validate',
       '#convert_path' => PathElement::CONVERT_ROUTE,
-    );
+    ];
 
     // A converted required validated path.
-    $form['required_validate_route'] = array(
+    $form['required_validate_route'] = [
       '#type' => 'path',
       '#required' => TRUE,
       '#title' => 'required_validate_route',
-    );
+    ];
 
     // A converted required validated path.
-    $form['required_validate_url'] = array(
+    $form['required_validate_url'] = [
       '#type' => 'path',
       '#required' => TRUE,
       '#title' => 'required_validate_url',
       '#convert_path' => PathElement::CONVERT_URL,
-    );
+    ];
 
-    $form['submit'] = array(
+    $form['submit'] = [
       '#type' => 'submit',
       '#value' => t('Submit'),
-    );
+    ];
 
     return $form;
   }
@@ -154,19 +154,19 @@ public function testPathElement() {
 
     // Valid form state.
     $this->assertEqual(count($form_state->getErrors()), 0);
-    $this->assertEqual($form_state->getValue('required_validate_route'), array(
+    $this->assertEqual($form_state->getValue('required_validate_route'), [
       'route_name' => 'entity.user.canonical',
-      'route_parameters' => array(
+      'route_parameters' => [
         'user' => $this->testUser->id(),
-      ),
-    ));
+      ],
+    ]);
     /** @var \Drupal\Core\Url $url */
     $url = $form_state->getValue('required_validate_url');
     $this->assertTrue($url instanceof Url);
     $this->assertEqual($url->getRouteName(), 'entity.user.canonical');
-    $this->assertEqual($url->getRouteParameters(), array(
+    $this->assertEqual($url->getRouteParameters(), [
       'user' => $this->testUser->id(),
-    ));
+    ]);
 
     // Test #required.
     $form_state = (new FormState())
@@ -179,7 +179,7 @@ public function testPathElement() {
     $errors = $form_state->getErrors();
     // Should be missing 'required_validate' field.
     $this->assertEqual(count($errors), 1);
-    $this->assertEqual($errors, array('required_validate' => t('@name field is required.', array('@name' => 'required_validate'))));
+    $this->assertEqual($errors, ['required_validate' => t('@name field is required.', ['@name' => 'required_validate'])]);
 
     // Test invalid parameters.
     $form_state = (new FormState())
@@ -195,11 +195,11 @@ public function testPathElement() {
     // Valid form state.
     $errors = $form_state->getErrors();
     $this->assertEqual(count($errors), 3);
-    $this->assertEqual($errors, array(
-      'required_validate' => t('This path does not exist or you do not have permission to link to %path.', array('%path' => 'user/74')),
-      'required_validate_route' => t('This path does not exist or you do not have permission to link to %path.', array('%path' => 'user/74')),
-      'required_validate_url' => t('This path does not exist or you do not have permission to link to %path.', array('%path' => 'user/74')),
-    ));
+    $this->assertEqual($errors, [
+      'required_validate' => t('This path does not exist or you do not have permission to link to %path.', ['%path' => 'user/74']),
+      'required_validate_route' => t('This path does not exist or you do not have permission to link to %path.', ['%path' => 'user/74']),
+      'required_validate_url' => t('This path does not exist or you do not have permission to link to %path.', ['%path' => 'user/74']),
+    ]);
   }
 
 }
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/BundleConstraintValidatorTest.php b/core/tests/Drupal/KernelTests/Core/Entity/BundleConstraintValidatorTest.php
index 2219487d7761f255968aa18d443fbdeea4ef7135..613ba4e17dd12816160f70b20a083637d258952e 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/BundleConstraintValidatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/BundleConstraintValidatorTest.php
@@ -19,7 +19,7 @@ class BundleConstraintValidatorTest extends KernelTestBase {
    */
   protected $typedData;
 
-  public static $modules = array('node', 'field', 'text', 'user');
+  public static $modules = ['node', 'field', 'text', 'user'];
 
   protected function setUp() {
     parent::setUp();
@@ -32,7 +32,7 @@ protected function setUp() {
    */
   public function testValidation() {
     // Test with multiple values.
-    $this->assertValidation(array('foo', 'bar'));
+    $this->assertValidation(['foo', 'bar']);
     // Test with a single string value as well.
     $this->assertValidation('foo');
   }
@@ -49,14 +49,14 @@ protected function assertValidation($bundle) {
       ->addConstraint('Bundle', $bundle);
 
     // Test the validation.
-    $node = $this->container->get('entity.manager')->getStorage('node')->create(array('type' => 'foo'));
+    $node = $this->container->get('entity.manager')->getStorage('node')->create(['type' => 'foo']);
 
     $typed_data = $this->typedData->create($definition, $node);
     $violations = $typed_data->validate();
     $this->assertEqual($violations->count(), 0, 'Validation passed for correct value.');
 
     // Test the validation when an invalid value is passed.
-    $page_node = $this->container->get('entity.manager')->getStorage('node')->create(array('type' => 'baz'));
+    $page_node = $this->container->get('entity.manager')->getStorage('node')->create(['type' => 'baz']);
 
     $typed_data = $this->typedData->create($definition, $page_node);
     $violations = $typed_data->validate();
@@ -64,7 +64,7 @@ protected function assertValidation($bundle) {
 
     // Make sure the information provided by a violation is correct.
     $violation = $violations[0];
-    $this->assertEqual($violation->getMessage(), t('The entity must be of bundle %bundle.', array('%bundle' => implode(', ', (array) $bundle))), 'The message for invalid value is correct.');
+    $this->assertEqual($violation->getMessage(), t('The entity must be of bundle %bundle.', ['%bundle' => implode(', ', (array) $bundle)]), 'The message for invalid value is correct.');
     $this->assertEqual($violation->getRoot(), $typed_data, 'Violation root is correct.');
     $this->assertEqual($violation->getInvalidValue(), $page_node, 'The invalid value is set correctly in the violation.');
   }
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/ConfigEntityQueryTest.php b/core/tests/Drupal/KernelTests/Core/Entity/ConfigEntityQueryTest.php
index 22cae65fe4ad8defcd210b095d75161285dfd11b..87ba10480ff7f038a8bda6bee43a6fb8c7dec8ad 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/ConfigEntityQueryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ConfigEntityQueryTest.php
@@ -19,7 +19,7 @@ class ConfigEntityQueryTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('config_test');
+  public static $modules = ['config_test'];
 
   /**
    * Stores the search results for alter comparison.
@@ -45,7 +45,7 @@ class ConfigEntityQueryTest extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->entities = array();
+    $this->entities = [];
     $this->factory = $this->container->get('entity.query');
 
     // These two are here to make sure that matchArray needs to go over several
@@ -54,56 +54,56 @@ protected function setUp() {
     $array['level1a']['level2'] = 9;
     // The tests match array.level1.level2.
     $array['level1']['level2'] = 1;
-    $entity = ConfigQueryTest::create(array(
+    $entity = ConfigQueryTest::create([
       'label' => $this->randomMachineName(),
       'id' => '1',
       'number' => 31,
       'array' => $array,
-    ));
+    ]);
     $this->entities[] = $entity;
     $entity->enforceIsNew();
     $entity->save();
 
     $array['level1']['level2'] = 2;
-    $entity = ConfigQueryTest::create(array(
+    $entity = ConfigQueryTest::create([
       'label' => $this->randomMachineName(),
       'id' => '2',
       'number' => 41,
       'array' => $array,
-    ));
+    ]);
     $this->entities[] = $entity;
     $entity->enforceIsNew();
     $entity->save();
 
     $array['level1']['level2'] = 1;
-    $entity = ConfigQueryTest::create(array(
+    $entity = ConfigQueryTest::create([
       'label' => 'test_prefix_' . $this->randomMachineName(),
       'id' => '3',
       'number' => 59,
       'array' => $array,
-    ));
+    ]);
     $this->entities[] = $entity;
     $entity->enforceIsNew();
     $entity->save();
 
     $array['level1']['level2'] = 2;
-    $entity = ConfigQueryTest::create(array(
+    $entity = ConfigQueryTest::create([
       'label' => $this->randomMachineName() . '_test_suffix',
       'id' => '4',
       'number' => 26,
       'array' => $array,
-    ));
+    ]);
     $this->entities[] = $entity;
     $entity->enforceIsNew();
     $entity->save();
 
     $array['level1']['level2'] = 3;
-    $entity = ConfigQueryTest::create(array(
+    $entity = ConfigQueryTest::create([
       'label' => $this->randomMachineName() . '_TEST_contains_' . $this->randomMachineName(),
       'id' => '5',
       'number' => 53,
       'array' => $array,
-    ));
+    ]);
     $this->entities[] = $entity;
     $entity->enforceIsNew();
     $entity->save();
@@ -116,84 +116,84 @@ public function testConfigEntityQuery() {
     // Run a test without any condition.
     $this->queryResults = $this->factory->get('config_query_test')
       ->execute();
-    $this->assertResults(array('1', '2', '3', '4', '5'));
+    $this->assertResults(['1', '2', '3', '4', '5']);
     // No conditions, OR.
     $this->queryResults = $this->factory->get('config_query_test', 'OR')
       ->execute();
-    $this->assertResults(array('1', '2', '3', '4', '5'));
+    $this->assertResults(['1', '2', '3', '4', '5']);
 
     // Filter by ID with equality.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', '3')
       ->execute();
-    $this->assertResults(array('3'));
+    $this->assertResults(['3']);
 
     // Filter by label with a known prefix.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('label', 'test_prefix', 'STARTS_WITH')
       ->execute();
-    $this->assertResults(array('3'));
+    $this->assertResults(['3']);
 
     // Filter by label with a known suffix.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('label', 'test_suffix', 'ENDS_WITH')
       ->execute();
-    $this->assertResults(array('4'));
+    $this->assertResults(['4']);
 
     // Filter by label with a known containing word.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('label', 'test_contains', 'CONTAINS')
       ->execute();
-    $this->assertResults(array('5'));
+    $this->assertResults(['5']);
 
     // Filter by ID with the IN operator.
     $this->queryResults = $this->factory->get('config_query_test')
-      ->condition('id', array('2', '3'), 'IN')
+      ->condition('id', ['2', '3'], 'IN')
       ->execute();
-    $this->assertResults(array('2', '3'));
+    $this->assertResults(['2', '3']);
 
     // Filter by ID with the implicit IN operator.
     $this->queryResults = $this->factory->get('config_query_test')
-      ->condition('id', array('2', '3'))
+      ->condition('id', ['2', '3'])
       ->execute();
-    $this->assertResults(array('2', '3'));
+    $this->assertResults(['2', '3']);
 
     // Filter by ID with the > operator.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', '3', '>')
       ->execute();
-    $this->assertResults(array('4', '5'));
+    $this->assertResults(['4', '5']);
 
     // Filter by ID with the >= operator.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', '3', '>=')
       ->execute();
-    $this->assertResults(array('3', '4', '5'));
+    $this->assertResults(['3', '4', '5']);
 
     // Filter by ID with the <> operator.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', '3', '<>')
       ->execute();
-    $this->assertResults(array('1', '2', '4', '5'));
+    $this->assertResults(['1', '2', '4', '5']);
 
     // Filter by ID with the < operator.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', '3', '<')
       ->execute();
-    $this->assertResults(array('1', '2'));
+    $this->assertResults(['1', '2']);
 
     // Filter by ID with the <= operator.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', '3', '<=')
       ->execute();
-    $this->assertResults(array('1', '2', '3'));
+    $this->assertResults(['1', '2', '3']);
 
     // Filter by two conditions on the same field.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('label', 'test_pref', 'STARTS_WITH')
       ->condition('label', 'test_prefix', 'STARTS_WITH')
       ->execute();
-    $this->assertResults(array('3'));
+    $this->assertResults(['3']);
 
     // Filter by two conditions on different fields. The first query matches for
     // a different ID, so the result is empty.
@@ -201,7 +201,7 @@ public function testConfigEntityQuery() {
       ->condition('label', 'test_prefix', 'STARTS_WITH')
       ->condition('id', '5')
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
 
     // Filter by two different conditions on different fields. This time the
     // first condition matches on one item, but the second one does as well.
@@ -209,7 +209,7 @@ public function testConfigEntityQuery() {
       ->condition('label', 'test_prefix', 'STARTS_WITH')
       ->condition('id', '3')
       ->execute();
-    $this->assertResults(array('3'));
+    $this->assertResults(['3']);
 
     // Filter by two different conditions, of which the first one matches for
     // every entry, the second one as well, but just the third one filters so
@@ -219,37 +219,37 @@ public function testConfigEntityQuery() {
       ->condition('number', 10, '>=')
       ->condition('number', 50, '>=')
       ->execute();
-    $this->assertResults(array('3', '5'));
+    $this->assertResults(['3', '5']);
 
     // Filter with an OR condition group.
     $this->queryResults = $this->factory->get('config_query_test', 'OR')
       ->condition('id', 1)
       ->condition('id', '2')
       ->execute();
-    $this->assertResults(array('1', '2'));
+    $this->assertResults(['1', '2']);
 
     // Simplify it with IN.
     $this->queryResults = $this->factory->get('config_query_test')
-      ->condition('id', array('1', '2'))
+      ->condition('id', ['1', '2'])
       ->execute();
-    $this->assertResults(array('1', '2'));
+    $this->assertResults(['1', '2']);
     // Try explicit IN.
     $this->queryResults = $this->factory->get('config_query_test')
-      ->condition('id', array('1', '2'), 'IN')
+      ->condition('id', ['1', '2'], 'IN')
       ->execute();
-    $this->assertResults(array('1', '2'));
+    $this->assertResults(['1', '2']);
     // Try not IN.
     $this->queryResults = $this->factory->get('config_query_test')
-      ->condition('id', array('1', '2'), 'NOT IN')
+      ->condition('id', ['1', '2'], 'NOT IN')
       ->execute();
-    $this->assertResults(array('3', '4', '5'));
+    $this->assertResults(['3', '4', '5']);
 
     // Filter with an OR condition group on different fields.
     $this->queryResults = $this->factory->get('config_query_test', 'OR')
       ->condition('id', 1)
       ->condition('number', 41)
       ->execute();
-    $this->assertResults(array('1', '2'));
+    $this->assertResults(['1', '2']);
 
     // Filter with an OR condition group on different fields but matching on the
     // same entity.
@@ -257,7 +257,7 @@ public function testConfigEntityQuery() {
       ->condition('id', 1)
       ->condition('number', 31)
       ->execute();
-    $this->assertResults(array('1'));
+    $this->assertResults(['1']);
 
     // NO simple conditions, YES complex conditions, 'AND'.
     $query = $this->factory->get('config_query_test', 'AND');
@@ -271,7 +271,7 @@ public function testConfigEntityQuery() {
       ->condition($and_condition_1)
       ->condition($and_condition_2)
       ->execute();
-    $this->assertResults(array('1'));
+    $this->assertResults(['1']);
 
     // NO simple conditions, YES complex conditions, 'OR'.
     $query = $this->factory->get('config_query_test', 'OR');
@@ -285,7 +285,7 @@ public function testConfigEntityQuery() {
       ->condition($and_condition_1)
       ->condition($and_condition_2)
       ->execute();
-    $this->assertResults(array('1', '2'));
+    $this->assertResults(['1', '2']);
 
     // YES simple conditions, YES complex conditions, 'AND'.
     $query = $this->factory->get('config_query_test', 'AND');
@@ -300,7 +300,7 @@ public function testConfigEntityQuery() {
       ->condition($and_condition_1)
       ->condition($and_condition_2)
       ->execute();
-    $this->assertResults(array('1'));
+    $this->assertResults(['1']);
 
     // YES simple conditions, YES complex conditions, 'OR'.
     $query = $this->factory->get('config_query_test', 'OR');
@@ -315,28 +315,28 @@ public function testConfigEntityQuery() {
       ->condition($and_condition_1)
       ->condition($and_condition_2)
       ->execute();
-    $this->assertResults(array('1', '2', '4', '5'));
+    $this->assertResults(['1', '2', '4', '5']);
 
     // Test the exists and notExists conditions.
     $this->queryResults = $this->factory->get('config_query_test')
       ->exists('id')
       ->execute();
-    $this->assertResults(array('1', '2', '3', '4', '5'));
+    $this->assertResults(['1', '2', '3', '4', '5']);
 
     $this->queryResults = $this->factory->get('config_query_test')
       ->exists('non-existent')
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
 
     $this->queryResults = $this->factory->get('config_query_test')
       ->notExists('id')
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
 
     $this->queryResults = $this->factory->get('config_query_test')
       ->notExists('non-existent')
       ->execute();
-    $this->assertResults(array('1', '2', '3', '4', '5'));
+    $this->assertResults(['1', '2', '3', '4', '5']);
   }
 
   /**
@@ -344,10 +344,10 @@ public function testConfigEntityQuery() {
    */
   public function testStringIdConditions() {
     // We need an entity with a non-numeric ID.
-    $entity = ConfigQueryTest::create(array(
+    $entity = ConfigQueryTest::create([
       'label' => $this->randomMachineName(),
       'id' => 'foo.bar',
-    ));
+    ]);
     $this->entities[] = $entity;
     $entity->enforceIsNew();
     $entity->save();
@@ -356,43 +356,43 @@ public function testStringIdConditions() {
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'foo.bar', 'STARTS_WITH')
       ->execute();
-    $this->assertResults(array('foo.bar'));
+    $this->assertResults(['foo.bar']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'f', 'STARTS_WITH')
       ->execute();
-    $this->assertResults(array('foo.bar'));
+    $this->assertResults(['foo.bar']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'miss', 'STARTS_WITH')
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
 
     // Test 'CONTAINS' condition.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'foo.bar', 'CONTAINS')
       ->execute();
-    $this->assertResults(array('foo.bar'));
+    $this->assertResults(['foo.bar']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'oo.ba', 'CONTAINS')
       ->execute();
-    $this->assertResults(array('foo.bar'));
+    $this->assertResults(['foo.bar']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'miss', 'CONTAINS')
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
 
     // Test 'ENDS_WITH' condition.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'foo.bar', 'ENDS_WITH')
       ->execute();
-    $this->assertResults(array('foo.bar'));
+    $this->assertResults(['foo.bar']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'r', 'ENDS_WITH')
       ->execute();
-    $this->assertResults(array('foo.bar'));
+    $this->assertResults(['foo.bar']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', 'miss', 'ENDS_WITH')
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
   }
 
   /**
@@ -429,62 +429,62 @@ public function testSortRange() {
     $this->queryResults = $this->factory->get('config_query_test')
       ->sort('number', 'DESC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('3', '5', '2', '1', '4'));
+    $this->assertIdentical(array_values($this->queryResults), ['3', '5', '2', '1', '4']);
 
     $this->queryResults = $this->factory->get('config_query_test')
       ->sort('number', 'ASC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('4', '1', '2', '5', '3'));
+    $this->assertIdentical(array_values($this->queryResults), ['4', '1', '2', '5', '3']);
 
     // Apply some filters and sort.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', '3', '>')
       ->sort('number', 'DESC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('5', '4'));
+    $this->assertIdentical(array_values($this->queryResults), ['5', '4']);
 
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('id', '3', '>')
       ->sort('number', 'ASC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('4', '5'));
+    $this->assertIdentical(array_values($this->queryResults), ['4', '5']);
 
     // Apply a pager and sort.
     $this->queryResults = $this->factory->get('config_query_test')
       ->sort('number', 'DESC')
       ->range('2', '2')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('2', '1'));
+    $this->assertIdentical(array_values($this->queryResults), ['2', '1']);
 
     $this->queryResults = $this->factory->get('config_query_test')
       ->sort('number', 'ASC')
       ->range('2', '2')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('2', '5'));
+    $this->assertIdentical(array_values($this->queryResults), ['2', '5']);
 
     // Add a range to a query without a start parameter.
     $this->queryResults = $this->factory->get('config_query_test')
       ->range(0, '3')
       ->sort('id', 'ASC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('1', '2', '3'));
+    $this->assertIdentical(array_values($this->queryResults), ['1', '2', '3']);
 
     // Apply a pager with limit 4.
     $this->queryResults = $this->factory->get('config_query_test')
       ->pager('4', 0)
       ->sort('id', 'ASC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('1', '2', '3', '4'));
+    $this->assertIdentical(array_values($this->queryResults), ['1', '2', '3', '4']);
   }
 
   /**
    * Tests sorting with tableSort on config entity queries.
    */
   public function testTableSort() {
-    $header = array(
-      array('data' => t('ID'), 'specifier' => 'id'),
-      array('data' => t('Number'), 'specifier' => 'number'),
-    );
+    $header = [
+      ['data' => t('ID'), 'specifier' => 'id'],
+      ['data' => t('Number'), 'specifier' => 'number'],
+    ];
 
     // Sort key: id
     // Sorting with 'DESC' upper case
@@ -492,28 +492,28 @@ public function testTableSort() {
       ->tableSort($header)
       ->sort('id', 'DESC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('5', '4', '3', '2', '1'));
+    $this->assertIdentical(array_values($this->queryResults), ['5', '4', '3', '2', '1']);
 
     // Sorting with 'ASC' upper case
     $this->queryResults = $this->factory->get('config_query_test')
       ->tableSort($header)
       ->sort('id', 'ASC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('1', '2', '3', '4', '5'));
+    $this->assertIdentical(array_values($this->queryResults), ['1', '2', '3', '4', '5']);
 
     // Sorting with 'desc' lower case
     $this->queryResults = $this->factory->get('config_query_test')
       ->tableSort($header)
       ->sort('id', 'desc')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('5', '4', '3', '2', '1'));
+    $this->assertIdentical(array_values($this->queryResults), ['5', '4', '3', '2', '1']);
 
     // Sorting with 'asc' lower case
     $this->queryResults = $this->factory->get('config_query_test')
       ->tableSort($header)
       ->sort('id', 'asc')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('1', '2', '3', '4', '5'));
+    $this->assertIdentical(array_values($this->queryResults), ['1', '2', '3', '4', '5']);
 
     // Sort key: number
     // Sorting with 'DeSc' mixed upper and lower case
@@ -521,28 +521,28 @@ public function testTableSort() {
       ->tableSort($header)
       ->sort('number', 'DeSc')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('3', '5', '2', '1', '4'));
+    $this->assertIdentical(array_values($this->queryResults), ['3', '5', '2', '1', '4']);
 
     // Sorting with 'AsC' mixed upper and lower case
     $this->queryResults = $this->factory->get('config_query_test')
       ->tableSort($header)
       ->sort('number', 'AsC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('4', '1', '2', '5', '3'));
+    $this->assertIdentical(array_values($this->queryResults), ['4', '1', '2', '5', '3']);
 
     // Sorting with 'dEsC' mixed upper and lower case
     $this->queryResults = $this->factory->get('config_query_test')
       ->tableSort($header)
       ->sort('number', 'dEsC')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('3', '5', '2', '1', '4'));
+    $this->assertIdentical(array_values($this->queryResults), ['3', '5', '2', '1', '4']);
 
     // Sorting with 'aSc' mixed upper and lower case
     $this->queryResults = $this->factory->get('config_query_test')
       ->tableSort($header)
       ->sort('number', 'aSc')
       ->execute();
-    $this->assertIdentical(array_values($this->queryResults), array('4', '1', '2', '5', '3'));
+    $this->assertIdentical(array_values($this->queryResults), ['4', '1', '2', '5', '3']);
   }
 
   /**
@@ -552,26 +552,26 @@ public function testDotted() {
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('array.level1.*', 1)
       ->execute();
-    $this->assertResults(array('1', '3'));
+    $this->assertResults(['1', '3']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('*.level1.level2', 2)
       ->execute();
-    $this->assertResults(array('2', '4'));
+    $this->assertResults(['2', '4']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('array.level1.*', 3)
       ->execute();
-    $this->assertResults(array('5'));
+    $this->assertResults(['5']);
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('array.level1.level2', 3)
       ->execute();
-    $this->assertResults(array('5'));
+    $this->assertResults(['5']);
     // Make sure that values on the wildcard level do not match if there are
     // sub-keys defined. This must not find anything even if entity 2 has a
     // top-level key number with value 41.
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('*.level1.level2', 41)
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
   }
 
   /**
@@ -582,12 +582,12 @@ public function testCaseSensitivity() {
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('label', 'TEST', 'CONTAINS')
       ->execute();
-    $this->assertResults(array('3', '4', '5'));
+    $this->assertResults(['3', '4', '5']);
 
     $this->queryResults = $this->factory->get('config_query_test')
       ->condition('label', 'test', 'CONTAINS')
       ->execute();
-    $this->assertResults(array('3', '4', '5'));
+    $this->assertResults(['3', '4', '5']);
   }
 
   /**
@@ -599,11 +599,11 @@ public function testLookupKeys() {
     $key_value = $this->container->get('keyvalue')->get(QueryFactory::CONFIG_LOOKUP_PREFIX . 'config_test');
 
     $test_entities = [];
-    $entity = entity_create('config_test', array(
+    $entity = entity_create('config_test', [
       'label' => $this->randomMachineName(),
       'id' => '1',
       'style' => 'test',
-    ));
+    ]);
     $test_entities[$entity->getConfigDependencyName()] = $entity;
     $entity->enforceIsNew();
     $entity->save();
@@ -612,22 +612,22 @@ public function testLookupKeys() {
     $expected[] = $entity->getConfigDependencyName();
     $this->assertEqual($expected, $key_value->get('style:test'));
 
-    $entity = entity_create('config_test', array(
+    $entity = entity_create('config_test', [
       'label' => $this->randomMachineName(),
       'id' => '2',
       'style' => 'test',
-    ));
+    ]);
     $test_entities[$entity->getConfigDependencyName()] = $entity;
     $entity->enforceIsNew();
     $entity->save();
     $expected[] = $entity->getConfigDependencyName();
     $this->assertEqual($expected, $key_value->get('style:test'));
 
-    $entity = entity_create('config_test', array(
+    $entity = entity_create('config_test', [
       'label' => $this->randomMachineName(),
       'id' => '3',
       'style' => 'blah',
-    ));
+    ]);
     $entity->enforceIsNew();
     $entity->save();
     // Do not add this entity to the list of expected result as it has a
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityChangedTest.php b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityChangedTest.php
index e9e2ad14252053d028c3184c84f3aea1ff28730a..66e1abb2c51ed0ce10169ff85abea870e1abcfc9 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityChangedTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityChangedTest.php
@@ -59,12 +59,12 @@ public function testChanged() {
     $user2 = $this->createUser();
 
     // Create a test entity.
-    $entity = EntityTestMulChanged::create(array(
+    $entity = EntityTestMulChanged::create([
       'name' => $this->randomString(),
       'not_translatable' => $this->randomString(),
       'user_id' => $user1->id(),
       'language' => 'en',
-    ));
+    ]);
     $entity->save();
 
     $this->assertTrue(
@@ -289,11 +289,11 @@ public function testRevisionChanged() {
     $user2 = $this->createUser();
 
     // Create a test entity.
-    $entity = EntityTestMulRevChanged::create(array(
+    $entity = EntityTestMulRevChanged::create([
       'name' => $this->randomString(),
       'user_id' => $user1->id(),
       'language' => 'en',
-    ));
+    ]);
     $entity->save();
 
     $this->assertTrue(
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityNonRevisionableFieldTest.php b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityNonRevisionableFieldTest.php
index 73684e9f7fa20e8389b0c78948df1b581e5eaae3..99c99b068836e79fcbeeb1fdc0e914cc1eeaeab6 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityNonRevisionableFieldTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityNonRevisionableFieldTest.php
@@ -57,21 +57,21 @@ public function testMulNonRevisionableField() {
     $user2 = $this->createUser();
 
     // Create a test entity.
-    $entity = EntityTestMulRev::create(array(
+    $entity = EntityTestMulRev::create([
       'name' => $this->randomString(),
       'user_id' => $user1->id(),
       'language' => 'en',
       'non_rev_field' => 'Huron',
-    ));
+    ]);
     $entity->save();
 
     // Create a test entity.
-    $entity2 = EntityTestMulRev::create(array(
+    $entity2 = EntityTestMulRev::create([
       'name' => $this->randomString(),
       'user_id' => $user1->id(),
       'language' => 'en',
       'non_rev_field' => 'Michigan',
-    ));
+    ]);
     $entity2->save();
 
     $this->assertEquals('Huron', $entity->get('non_rev_field')->value, 'Huron found on entity 1');
@@ -123,19 +123,19 @@ public function testNonRevisionableField() {
     $user2 = $this->createUser();
 
     // Create a test entity.
-    $entity = EntityTestRev::create(array(
+    $entity = EntityTestRev::create([
       'name' => $this->randomString(),
       'user_id' => $user1->id(),
       'non_rev_field' => 'Superior',
-    ));
+    ]);
     $entity->save();
 
     // Create a test entity.
-    $entity2 = EntityTestRev::create(array(
+    $entity2 = EntityTestRev::create([
       'name' => $this->randomString(),
       'user_id' => $user1->id(),
       'non_rev_field' => 'Ontario',
-    ));
+    ]);
     $entity2->save();
 
     $this->assertEquals('Superior', $entity->get('non_rev_field')->value, 'Superior found on entity 1');
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityNullStorageTest.php b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityNullStorageTest.php
index 51162fcd634522a51f735abb63e7fb29fb6bf2f0..697f1be15d994a2e77c25523181772cb1be376b7 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityNullStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityNullStorageTest.php
@@ -22,7 +22,7 @@ class ContentEntityNullStorageTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'contact', 'user');
+  public static $modules = ['system', 'contact', 'user'];
 
   /**
    * Tests using entity query with ContentEntityNullStorage.
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/Element/EntityAutocompleteElementFormTest.php b/core/tests/Drupal/KernelTests/Core/Entity/Element/EntityAutocompleteElementFormTest.php
index c2d737bfb8d840e9577fc8ce1db6732dd4c3b7d2..5d7ea0eb8ed1625dd94a75d04e06cf44a36ae8b7 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/Element/EntityAutocompleteElementFormTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/Element/EntityAutocompleteElementFormTest.php
@@ -50,23 +50,23 @@ protected function setUp() {
     $this->installEntitySchema('entity_test_string_id');
     \Drupal::service('router.builder')->rebuild();
 
-    $this->testUser = User::create(array(
+    $this->testUser = User::create([
       'name' => 'foobar1',
       'mail' => 'foobar1@example.com',
-    ));
+    ]);
     $this->testUser->save();
     \Drupal::service('current_user')->setAccount($this->testUser);
 
-    $this->testAutocreateUser = User::create(array(
+    $this->testAutocreateUser = User::create([
       'name' => 'foobar2',
       'mail' => 'foobar2@example.com',
-    ));
+    ]);
     $this->testAutocreateUser->save();
 
     for ($i = 1; $i < 3; $i++) {
-      $entity = EntityTest::create(array(
+      $entity = EntityTest::create([
         'name' => $this->randomMachineName()
-      ));
+      ]);
       $entity->save();
       $this->referencedEntities[] = $entity;
     }
@@ -94,84 +94,84 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['single'] = array(
+    $form['single'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
-    );
-    $form['single_autocreate'] = array(
+    ];
+    $form['single_autocreate'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
-      '#autocreate' => array(
+      '#autocreate' => [
         'bundle' => 'entity_test',
-      ),
-    );
-    $form['single_autocreate_specific_uid'] = array(
+      ],
+    ];
+    $form['single_autocreate_specific_uid'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
-      '#autocreate' => array(
+      '#autocreate' => [
         'bundle' => 'entity_test',
         'uid' => $this->testAutocreateUser->id(),
-      ),
-    );
+      ],
+    ];
 
-    $form['tags'] = array(
+    $form['tags'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
       '#tags' => TRUE,
-    );
-    $form['tags_autocreate'] = array(
+    ];
+    $form['tags_autocreate'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
       '#tags' => TRUE,
-      '#autocreate' => array(
+      '#autocreate' => [
         'bundle' => 'entity_test',
-      ),
-    );
-    $form['tags_autocreate_specific_uid'] = array(
+      ],
+    ];
+    $form['tags_autocreate_specific_uid'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
       '#tags' => TRUE,
-      '#autocreate' => array(
+      '#autocreate' => [
         'bundle' => 'entity_test',
         'uid' => $this->testAutocreateUser->id(),
-      ),
-    );
+      ],
+    ];
 
-    $form['single_no_validate'] = array(
+    $form['single_no_validate'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
       '#validate_reference' => FALSE,
-    );
-    $form['single_autocreate_no_validate'] = array(
+    ];
+    $form['single_autocreate_no_validate'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
       '#validate_reference' => FALSE,
-      '#autocreate' => array(
+      '#autocreate' => [
         'bundle' => 'entity_test',
-      ),
-    );
+      ],
+    ];
 
-    $form['single_access'] = array(
+    $form['single_access'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
       '#default_value' => $this->referencedEntities[0],
-    );
-    $form['tags_access'] = array(
+    ];
+    $form['tags_access'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test',
       '#tags' => TRUE,
-      '#default_value' => array($this->referencedEntities[0], $this->referencedEntities[1]),
-    );
+      '#default_value' => [$this->referencedEntities[0], $this->referencedEntities[1]],
+    ];
 
-    $form['single_string_id'] = array(
+    $form['single_string_id'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test_string_id',
-    );
-    $form['tags_string_id'] = array(
+    ];
+    $form['tags_string_id'] = [
       '#type' => 'entity_autocomplete',
       '#target_type' => 'entity_test_string_id',
       '#tags' => TRUE,
-    );
+    ];
 
     return $form;
   }
@@ -229,10 +229,10 @@ public function testValidEntityAutocompleteElement() {
     $this->assertEqual($value['entity']->getOwnerId(), $this->testAutocreateUser->id());
 
     // Test the 'tags' element.
-    $expected = array(
-      array('target_id' => $this->referencedEntities[0]->id()),
-      array('target_id' => $this->referencedEntities[1]->id()),
-    );
+    $expected = [
+      ['target_id' => $this->referencedEntities[0]->id()],
+      ['target_id' => $this->referencedEntities[1]->id()],
+    ];
     $this->assertEqual($form_state->getValue('tags'), $expected);
 
     // Test the 'single_autocreate' element.
@@ -281,7 +281,7 @@ public function testInvalidEntityAutocompleteElement() {
       ]);
     $form_builder->submitForm($this, $form_state);
     $this->assertEqual(count($form_state->getErrors()), 1);
-    $this->assertEqual($form_state->getErrors()['single'], t('There are no entities matching "%value".', array('%value' => 'single - non-existent label')));
+    $this->assertEqual($form_state->getErrors()['single'], t('There are no entities matching "%value".', ['%value' => 'single - non-existent label']));
 
     // Test 'single' with a entity ID that doesn't exist.
     $form_state = (new FormState())
@@ -290,7 +290,7 @@ public function testInvalidEntityAutocompleteElement() {
       ]);
     $form_builder->submitForm($this, $form_state);
     $this->assertEqual(count($form_state->getErrors()), 1);
-    $this->assertEqual($form_state->getErrors()['single'], t('The referenced entity (%type: %id) does not exist.', array('%type' => 'entity_test', '%id' => 42)));
+    $this->assertEqual($form_state->getErrors()['single'], t('The referenced entity (%type: %id) does not exist.', ['%type' => 'entity_test', '%id' => 42]));
 
     // Do the same tests as above but on an element with '#validate_reference'
     // set to FALSE.
@@ -304,7 +304,7 @@ public function testInvalidEntityAutocompleteElement() {
     // The element without 'autocreate' support still has to emit a warning when
     // the input doesn't end with an entity ID enclosed in parentheses.
     $this->assertEqual(count($form_state->getErrors()), 1);
-    $this->assertEqual($form_state->getErrors()['single_no_validate'], t('There are no entities matching "%value".', array('%value' => 'single - non-existent label')));
+    $this->assertEqual($form_state->getErrors()['single_no_validate'], t('There are no entities matching "%value".', ['%value' => 'single - non-existent label']));
 
     $form_state = (new FormState())
       ->setValues([
@@ -333,7 +333,7 @@ public function testEntityAutocompleteAccess() {
     $this->assertEqual($form['tags_access']['#value'], $expected);
 
     // Set up a non-admin user that is *not* allowed to view test entities.
-    \Drupal::currentUser()->setAccount($this->createUser(array(), array()));
+    \Drupal::currentUser()->setAccount($this->createUser([], []));
 
     // Rebuild the form.
     $form = $form_builder->getForm($this);
@@ -381,7 +381,7 @@ public function testEntityAutocompleteIdInput() {
    *   A string that can be used as a value for EntityAutocomplete elements.
    */
   protected function getAutocompleteInput(EntityInterface $entity) {
-    return EntityAutocomplete::getEntityLabels(array($entity));
+    return EntityAutocomplete::getEntityLabels([$entity]);
   }
 
 }
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php
index 77210d5c4dadfc8869ac26322f278b2113f8ddcb..a0ab99978c0ee72de8ca9c0c41b44ec702336075 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php
@@ -25,10 +25,10 @@ class EntityAccessControlHandlerTest extends EntityLanguageTestBase {
    */
   function assertEntityAccess($ops, AccessibleInterface $object, AccountInterface $account = NULL) {
     foreach ($ops as $op => $result) {
-      $message = format_string("Entity access returns @result with operation '@op'.", array(
+      $message = format_string("Entity access returns @result with operation '@op'.", [
         '@result' => !isset($result) ? 'null' : ($result ? 'true' : 'false'),
         '@op' => $op,
-      ));
+      ]);
 
       $this->assertEqual($result, $object->access($op, $account), $message);
     }
@@ -45,44 +45,44 @@ public function testUserLabelAccess() {
     $user = $this->createUser();
 
     // The current user is allowed to view the anonymous user label.
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
       'create' => FALSE,
       'update' => FALSE,
       'delete' => FALSE,
       'view' => FALSE,
       'view label' => TRUE,
-    ), $anonymous_user);
+    ], $anonymous_user);
 
     // The current user is allowed to view user labels.
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
       'create' => FALSE,
       'update' => FALSE,
       'delete' => FALSE,
       'view' => FALSE,
       'view label' => TRUE,
-    ), $user);
+    ], $user);
 
     // Switch to a anonymous user account.
     $account_switcher = \Drupal::service('account_switcher');
     $account_switcher->switchTo(new AnonymousUserSession());
 
     // The anonymous user is allowed to view the anonymous user label.
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
       'create' => FALSE,
       'update' => FALSE,
       'delete' => FALSE,
       'view' => FALSE,
       'view label' => TRUE,
-    ), $anonymous_user);
+    ], $anonymous_user);
 
     // The anonymous user is allowed to view user labels.
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
       'create' => FALSE,
       'update' => FALSE,
       'delete' => FALSE,
       'view' => FALSE,
       'view label' => TRUE,
-    ), $user);
+    ], $user);
 
     // Restore user account.
     $account_switcher->switchBack();
@@ -93,33 +93,33 @@ public function testUserLabelAccess() {
    */
   function testEntityAccess() {
     // Set up a non-admin user that is allowed to view test entities.
-    \Drupal::currentUser()->setAccount($this->createUser(array('uid' => 2), array('view test entity')));
+    \Drupal::currentUser()->setAccount($this->createUser(['uid' => 2], ['view test entity']));
 
     // Use the 'entity_test_label' entity type in order to test the 'view label'
     // access operation.
-    $entity = EntityTestLabel::create(array(
+    $entity = EntityTestLabel::create([
       'name' => 'test',
-    ));
+    ]);
 
     // The current user is allowed to view entities.
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
       'create' => FALSE,
       'update' => FALSE,
       'delete' => FALSE,
       'view' => TRUE,
       'view label' => TRUE,
-    ), $entity);
+    ], $entity);
 
     // The custom user is not allowed to perform any operation on test entities,
     // except for viewing their label.
     $custom_user = $this->createUser();
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
       'create' => FALSE,
       'update' => FALSE,
       'delete' => FALSE,
       'view' => FALSE,
       'view label' => TRUE,
-    ), $entity, $custom_user);
+    ], $entity, $custom_user);
   }
 
   /**
@@ -136,18 +136,18 @@ function testEntityAccess() {
    */
   function testDefaultEntityAccess() {
     // Set up a non-admin user that is allowed to view test entities.
-    \Drupal::currentUser()->setAccount($this->createUser(array('uid' => 2), array('view test entity')));
-    $entity = EntityTest::create(array(
+    \Drupal::currentUser()->setAccount($this->createUser(['uid' => 2], ['view test entity']));
+    $entity = EntityTest::create([
         'name' => 'forbid_access',
-      ));
+      ]);
 
     // The user is denied access to the entity.
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
         'create' => FALSE,
         'update' => FALSE,
         'delete' => FALSE,
         'view' => FALSE,
-      ), $entity);
+      ], $entity);
   }
 
   /**
@@ -155,7 +155,7 @@ function testDefaultEntityAccess() {
    */
   function testEntityAccessDefaultController() {
     // The implementation requires that the global user id can be loaded.
-    \Drupal::currentUser()->setAccount($this->createUser(array('uid' => 2)));
+    \Drupal::currentUser()->setAccount($this->createUser(['uid' => 2]));
 
     // Check that the default access control handler is used for entities that don't
     // have a specific access control handler defined.
@@ -163,12 +163,12 @@ function testEntityAccessDefaultController() {
     $this->assertTrue($handler instanceof EntityAccessControlHandler, 'The default entity handler is used for the entity_test_default_access entity type.');
 
     $entity = EntityTestDefaultAccess::create();
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
       'create' => FALSE,
       'update' => FALSE,
       'delete' => FALSE,
       'view' => FALSE,
-    ), $entity);
+    ], $entity);
   }
 
   /**
@@ -177,26 +177,26 @@ function testEntityAccessDefaultController() {
   function testEntityTranslationAccess() {
 
     // Set up a non-admin user that is allowed to view test entity translations.
-    \Drupal::currentUser()->setAccount($this->createUser(array('uid' => 2), array('view test entity translations')));
+    \Drupal::currentUser()->setAccount($this->createUser(['uid' => 2], ['view test entity translations']));
 
     // Create two test languages.
-    foreach (array('foo', 'bar') as $langcode) {
-      ConfigurableLanguage::create(array(
+    foreach (['foo', 'bar'] as $langcode) {
+      ConfigurableLanguage::create([
         'id' => $langcode,
         'label' => $this->randomString(),
-      ))->save();
+      ])->save();
     }
 
-    $entity = EntityTest::create(array(
+    $entity = EntityTest::create([
       'name' => 'test',
       'langcode' => 'foo',
-    ));
+    ]);
     $entity->save();
 
     $translation = $entity->addTranslation('bar');
-    $this->assertEntityAccess(array(
+    $this->assertEntityAccess([
       'view' => TRUE,
-    ), $translation);
+    ], $translation);
   }
 
   /**
@@ -204,9 +204,9 @@ function testEntityTranslationAccess() {
    */
   public function testHooks() {
     $state = $this->container->get('state');
-    $entity = EntityTest::create(array(
+    $entity = EntityTest::create([
       'name' => 'test',
-    ));
+    ]);
 
     // Test hook_entity_create_access() and hook_ENTITY_TYPE_create_access().
     $entity->access('create');
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityApiTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityApiTest.php
index 7ce15f53cdd8d04c8972eb929d2d4bc09aed7c43..744121e764f58cb4b2b084aa06411a09f30fc802 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityApiTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityApiTest.php
@@ -49,15 +49,15 @@ protected function assertCRUD($entity_type, UserInterface $user1) {
     // Create some test entities.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('name' => 'test', 'user_id' => $user1->id()));
+      ->create(['name' => 'test', 'user_id' => $user1->id()]);
     $entity->save();
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('name' => 'test2', 'user_id' => $user1->id()));
+      ->create(['name' => 'test2', 'user_id' => $user1->id()]);
     $entity->save();
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('name' => 'test', 'user_id' => NULL));
+      ->create(['name' => 'test', 'user_id' => NULL]);
     $entity->save();
 
     /** @var \Drupal\Core\Entity\EntityStorageInterface $storage */
@@ -65,32 +65,32 @@ protected function assertCRUD($entity_type, UserInterface $user1) {
       ->getStorage($entity_type);
 
     $entities = array_values($storage->loadByProperties(['name' => 'test']));
-    $this->assertEqual($entities[0]->name->value, 'test', format_string('%entity_type: Created and loaded entity', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entities[1]->name->value, 'test', format_string('%entity_type: Created and loaded entity', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entities[0]->name->value, 'test', format_string('%entity_type: Created and loaded entity', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entities[1]->name->value, 'test', format_string('%entity_type: Created and loaded entity', ['%entity_type' => $entity_type]));
 
     // Test loading a single entity.
     $loaded_entity = $storage->load($entity->id());
-    $this->assertEqual($loaded_entity->id(), $entity->id(), format_string('%entity_type: Loaded a single entity by id.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($loaded_entity->id(), $entity->id(), format_string('%entity_type: Loaded a single entity by id.', ['%entity_type' => $entity_type]));
 
     // Test deleting an entity.
     $entities = array_values($storage->loadByProperties(['name' => 'test2']));
     $entities[0]->delete();
     $entities = array_values($storage->loadByProperties(['name' => 'test2']));
-    $this->assertEqual($entities, array(), format_string('%entity_type: Entity deleted.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entities, [], format_string('%entity_type: Entity deleted.', ['%entity_type' => $entity_type]));
 
     // Test updating an entity.
     $entities = array_values($storage->loadByProperties(['name' => 'test']));
     $entities[0]->name->value = 'test3';
     $entities[0]->save();
     $entity = $storage->load($entities[0]->id());
-    $this->assertEqual($entity->name->value, 'test3', format_string('%entity_type: Entity updated.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entity->name->value, 'test3', format_string('%entity_type: Entity updated.', ['%entity_type' => $entity_type]));
 
     // Try deleting multiple test entities by deleting all.
     $ids = array_keys($storage->loadMultiple());
     entity_delete_multiple($entity_type, $ids);
 
     $all = $storage->loadMultiple();
-    $this->assertTrue(empty($all), format_string('%entity_type: Deleted all entities.', array('%entity_type' => $entity_type)));
+    $this->assertTrue(empty($all), format_string('%entity_type: Deleted all entities.', ['%entity_type' => $entity_type]));
 
     // Verify that all data got deleted.
     $definition = \Drupal::entityManager()->getDefinition($entity_type);
@@ -103,11 +103,11 @@ protected function assertCRUD($entity_type, UserInterface $user1) {
     }
 
     // Test deleting a list of entities not indexed by entity id.
-    $entities = array();
-    $entity = entity_create($entity_type, array('name' => 'test', 'user_id' => $user1->id()));
+    $entities = [];
+    $entity = entity_create($entity_type, ['name' => 'test', 'user_id' => $user1->id()]);
     $entity->save();
     $entities['test'] = $entity;
-    $entity = entity_create($entity_type, array('name' => 'test2', 'user_id' => $user1->id()));
+    $entity = entity_create($entity_type, ['name' => 'test2', 'user_id' => $user1->id()]);
     $entity->save();
     $entities['test2'] = $entity;
     $controller = \Drupal::entityManager()->getStorage($entity_type);
@@ -115,7 +115,7 @@ protected function assertCRUD($entity_type, UserInterface $user1) {
 
     // Verify that entities got deleted.
     $all = $storage->loadMultiple();
-    $this->assertTrue(empty($all), format_string('%entity_type: Deleted all entities.', array('%entity_type' => $entity_type)));
+    $this->assertTrue(empty($all), format_string('%entity_type: Deleted all entities.', ['%entity_type' => $entity_type]));
 
     // Verify that all data got deleted from the tables.
     $definition = \Drupal::entityManager()->getDefinition($entity_type);
@@ -132,7 +132,7 @@ protected function assertCRUD($entity_type, UserInterface $user1) {
    * Tests that exceptions are thrown when saving or deleting an entity.
    */
   public function testEntityStorageExceptionHandling() {
-    $entity = EntityTest::create(array('name' => 'test'));
+    $entity = EntityTest::create(['name' => 'test']);
     try {
       $GLOBALS['entity_test_throw_exception'] = TRUE;
       $entity->save();
@@ -142,7 +142,7 @@ public function testEntityStorageExceptionHandling() {
       $this->assertEqual($e->getcode(), 1, 'Entity presave EntityStorageException caught.');
     }
 
-    $entity = EntityTest::create(array('name' => 'test2'));
+    $entity = EntityTest::create(['name' => 'test2']);
     try {
       unset($GLOBALS['entity_test_throw_exception']);
       $entity->save();
@@ -152,7 +152,7 @@ public function testEntityStorageExceptionHandling() {
       $this->assertNotEqual($e->getCode(), 1, 'Entity presave EntityStorageException caught.');
     }
 
-    $entity = EntityTest::create(array('name' => 'test3'));
+    $entity = EntityTest::create(['name' => 'test3']);
     $entity->save();
     try {
       $GLOBALS['entity_test_throw_exception'] = TRUE;
@@ -164,7 +164,7 @@ public function testEntityStorageExceptionHandling() {
     }
 
     unset($GLOBALS['entity_test_throw_exception']);
-    $entity = EntityTest::create(array('name' => 'test4'));
+    $entity = EntityTest::create(['name' => 'test4']);
     $entity->save();
     try {
       $entity->delete();
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityAutocompleteTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityAutocompleteTest.php
index ae4925ce01c687717f745f0fc4f2b553f81569b3..3fed33c05193b19ae0fd951e27ea04c2f0960d1a 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityAutocompleteTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityAutocompleteTest.php
@@ -47,19 +47,19 @@ function testEntityReferenceAutocompletion() {
     // Add an entity with a slash in its name.
     $entity_1 = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => '10/16/2011'));
+      ->create(['name' => '10/16/2011']);
     $entity_1->save();
 
     // Add another entity that differs after the slash character.
     $entity_2 = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => '10/17/2011'));
+      ->create(['name' => '10/17/2011']);
     $entity_2->save();
 
     // Add another entity that has both a comma, a slash and markup.
     $entity_3 = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('name' => 'label with, and / test'));
+      ->create(['name' => 'label with, and / test']);
     $entity_3->save();
 
     // Try to autocomplete a entity label that matches both entities.
@@ -73,10 +73,10 @@ function testEntityReferenceAutocompletion() {
     // We should only get the first entity in a JSON encoded string.
     $input = '10/16';
     $data = $this->getAutocompleteResult($input);
-    $target = array(
+    $target = [
       'value' => $entity_1->name->value . ' (1)',
       'label' => Html::escape($entity_1->name->value),
-    );
+    ];
     $this->assertIdentical(reset($data), $target, 'Autocomplete returns only the expected matching entity.');
 
     // Try to autocomplete a entity label that matches the second entity, and
@@ -91,10 +91,10 @@ function testEntityReferenceAutocompletion() {
     $n = $entity_3->name->value . ' (3)';
     // Entity labels containing commas or quotes must be wrapped in quotes.
     $n = Tags::encode($n);
-    $target = array(
+    $target = [
       'value' => $n,
       'label' => Html::escape($entity_3->name->value),
-    );
+    ];
     $this->assertIdentical(reset($data), $target, 'Autocomplete returns an entity label containing a comma and a slash.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityBundleFieldTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityBundleFieldTest.php
index ec8fd1cfe46d55c42d0172045ab719899557e604..ed30d4b56f4d3ab4d6241feaf378527bc1fa3917 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityBundleFieldTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityBundleFieldTest.php
@@ -14,7 +14,7 @@ class EntityBundleFieldTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_schema_test');
+  public static $modules = ['entity_schema_test'];
 
   /**
    * The module handler.
@@ -35,7 +35,7 @@ class EntityBundleFieldTest extends EntityKernelTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('user', array('users_data'));
+    $this->installSchema('user', ['users_data']);
     $this->moduleHandler = $this->container->get('module_handler');
     $this->database = $this->container->get('database');
   }
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityCrudHookTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityCrudHookTest.php
index 935fd7a2af7b6adafdeee64c5e56741f7137a78d..8178cecf8b18db9f7ed3e01fd0e323b8bdd134bc 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityCrudHookTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityCrudHookTest.php
@@ -40,17 +40,17 @@ class EntityCrudHookTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('block', 'block_test', 'entity_crud_hook_test', 'file', 'taxonomy', 'node', 'comment');
+  public static $modules = ['block', 'block_test', 'entity_crud_hook_test', 'file', 'taxonomy', 'node', 'comment'];
 
-  protected $ids = array();
+  protected $ids = [];
 
   protected function setUp() {
     parent::setUp();
 
-    $this->installSchema('user', array('users_data'));
-    $this->installSchema('file', array('file_usage'));
-    $this->installSchema('node', array('node_access'));
-    $this->installSchema('comment', array('comment_entity_statistics'));
+    $this->installSchema('user', ['users_data']);
+    $this->installSchema('file', ['file_usage']);
+    $this->installSchema('node', ['node_access']);
+    $this->installSchema('comment', ['comment_entity_statistics']);
     $this->installConfig(['node', 'comment']);
   }
 
@@ -64,7 +64,7 @@ protected function setUp() {
    *   An array of plain-text messages in the order they should appear.
    */
   protected function assertHookMessageOrder($messages) {
-    $positions = array();
+    $positions = [];
     foreach ($messages as $message) {
       // Verify that each message is found and record its position.
       $position = array_search($message, $GLOBALS['entity_crud_hook_test']);
@@ -83,55 +83,55 @@ protected function assertHookMessageOrder($messages) {
    * Tests hook invocations for CRUD operations on blocks.
    */
   public function testBlockHooks() {
-    $entity = Block::create(array(
+    $entity = Block::create([
       'id' => 'stark_test_html',
       'plugin' => 'test_html',
       'theme' => 'stark',
-    ));
+    ]);
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_block_create called',
       'entity_crud_hook_test_entity_create called for type block',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $entity->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_block_presave called',
       'entity_crud_hook_test_entity_presave called for type block',
       'entity_crud_hook_test_block_insert called',
       'entity_crud_hook_test_entity_insert called for type block',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $entity = Block::load($entity->id());
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_entity_load called for type block',
       'entity_crud_hook_test_block_load called',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $entity->label = 'New label';
     $entity->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_block_presave called',
       'entity_crud_hook_test_entity_presave called for type block',
       'entity_crud_hook_test_block_update called',
       'entity_crud_hook_test_entity_update called for type block',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $entity->delete();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_block_predelete called',
       'entity_crud_hook_test_entity_predelete called for type block',
       'entity_crud_hook_test_block_delete called',
       'entity_crud_hook_test_entity_delete called for type block',
-    ));
+    ]);
   }
 
   /**
@@ -158,9 +158,9 @@ public function testCommentHooks() {
     ]);
     $node->save();
     $nid = $node->id();
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
 
-    $comment = Comment::create(array(
+    $comment = Comment::create([
       'cid' => NULL,
       'pid' => 0,
       'entity_id' => $nid,
@@ -172,51 +172,51 @@ public function testCommentHooks() {
       'changed' => REQUEST_TIME,
       'status' => 1,
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-    ));
+    ]);
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_comment_create called',
       'entity_crud_hook_test_entity_create called for type comment',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $comment->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_comment_presave called',
       'entity_crud_hook_test_entity_presave called for type comment',
       'entity_crud_hook_test_comment_insert called',
       'entity_crud_hook_test_entity_insert called for type comment',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $comment = Comment::load($comment->id());
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_entity_load called for type comment',
       'entity_crud_hook_test_comment_load called',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $comment->setSubject('New subject');
     $comment->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_comment_presave called',
       'entity_crud_hook_test_entity_presave called for type comment',
       'entity_crud_hook_test_comment_update called',
       'entity_crud_hook_test_entity_update called for type comment',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $comment->delete();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_comment_predelete called',
       'entity_crud_hook_test_entity_predelete called for type comment',
       'entity_crud_hook_test_comment_delete called',
       'entity_crud_hook_test_entity_delete called for type comment',
-    ));
+    ]);
   }
 
   /**
@@ -239,49 +239,49 @@ public function testFileHooks() {
       'changed' => REQUEST_TIME,
     ]);
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_file_create called',
       'entity_crud_hook_test_entity_create called for type file',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $file->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_file_presave called',
       'entity_crud_hook_test_entity_presave called for type file',
       'entity_crud_hook_test_file_insert called',
       'entity_crud_hook_test_entity_insert called for type file',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $file = File::load($file->id());
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_entity_load called for type file',
       'entity_crud_hook_test_file_load called',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $file->setFilename('new.entity_crud_hook_test.file');
     $file->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_file_presave called',
       'entity_crud_hook_test_entity_presave called for type file',
       'entity_crud_hook_test_file_update called',
       'entity_crud_hook_test_entity_update called for type file',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $file->delete();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_file_predelete called',
       'entity_crud_hook_test_entity_predelete called for type file',
       'entity_crud_hook_test_file_delete called',
       'entity_crud_hook_test_entity_delete called for type file',
-    ));
+    ]);
   }
 
   /**
@@ -302,49 +302,49 @@ public function testNodeHooks() {
       'changed' => REQUEST_TIME,
     ]);
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_node_create called',
       'entity_crud_hook_test_entity_create called for type node',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $node->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_node_presave called',
       'entity_crud_hook_test_entity_presave called for type node',
       'entity_crud_hook_test_node_insert called',
       'entity_crud_hook_test_entity_insert called for type node',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $node = Node::load($node->id());
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_entity_load called for type node',
       'entity_crud_hook_test_node_load called',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $node->title = 'New title';
     $node->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_node_presave called',
       'entity_crud_hook_test_entity_presave called for type node',
       'entity_crud_hook_test_node_update called',
       'entity_crud_hook_test_entity_update called for type node',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $node->delete();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_node_predelete called',
       'entity_crud_hook_test_entity_predelete called for type node',
       'entity_crud_hook_test_node_delete called',
       'entity_crud_hook_test_entity_delete called for type node',
-    ));
+    ]);
   }
 
   /**
@@ -361,7 +361,7 @@ public function testTaxonomyTermHooks() {
       'module' => 'entity_crud_hook_test',
     ]);
     $vocabulary->save();
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
 
     $term = Term::create([
       'vid' => $vocabulary->id(),
@@ -371,49 +371,49 @@ public function testTaxonomyTermHooks() {
       'format' => 1,
     ]);
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_taxonomy_term_create called',
       'entity_crud_hook_test_entity_create called for type taxonomy_term',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $term->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_taxonomy_term_presave called',
       'entity_crud_hook_test_entity_presave called for type taxonomy_term',
       'entity_crud_hook_test_taxonomy_term_insert called',
       'entity_crud_hook_test_entity_insert called for type taxonomy_term',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $term = Term::load($term->id());
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_entity_load called for type taxonomy_term',
       'entity_crud_hook_test_taxonomy_term_load called',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $term->setName('New name');
     $term->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_taxonomy_term_presave called',
       'entity_crud_hook_test_entity_presave called for type taxonomy_term',
       'entity_crud_hook_test_taxonomy_term_update called',
       'entity_crud_hook_test_entity_update called for type taxonomy_term',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $term->delete();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_taxonomy_term_predelete called',
       'entity_crud_hook_test_entity_predelete called for type taxonomy_term',
       'entity_crud_hook_test_taxonomy_term_delete called',
       'entity_crud_hook_test_entity_delete called for type taxonomy_term',
-    ));
+    ]);
   }
 
   /**
@@ -430,49 +430,49 @@ public function testTaxonomyVocabularyHooks() {
       'module' => 'entity_crud_hook_test',
     ]);
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_taxonomy_vocabulary_create called',
       'entity_crud_hook_test_entity_create called for type taxonomy_vocabulary',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $vocabulary->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_taxonomy_vocabulary_presave called',
       'entity_crud_hook_test_entity_presave called for type taxonomy_vocabulary',
       'entity_crud_hook_test_taxonomy_vocabulary_insert called',
       'entity_crud_hook_test_entity_insert called for type taxonomy_vocabulary',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $vocabulary = Vocabulary::load($vocabulary->id());
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_entity_load called for type taxonomy_vocabulary',
       'entity_crud_hook_test_taxonomy_vocabulary_load called',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $vocabulary->set('name', 'New name');
     $vocabulary->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_taxonomy_vocabulary_presave called',
       'entity_crud_hook_test_entity_presave called for type taxonomy_vocabulary',
       'entity_crud_hook_test_taxonomy_vocabulary_update called',
       'entity_crud_hook_test_entity_update called for type taxonomy_vocabulary',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $vocabulary->delete();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_taxonomy_vocabulary_predelete called',
       'entity_crud_hook_test_entity_predelete called for type taxonomy_vocabulary',
       'entity_crud_hook_test_taxonomy_vocabulary_delete called',
       'entity_crud_hook_test_entity_delete called for type taxonomy_vocabulary',
-    ));
+    ]);
   }
 
   /**
@@ -487,49 +487,49 @@ public function testUserHooks() {
       'language' => 'en',
     ]);
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_user_create called',
       'entity_crud_hook_test_entity_create called for type user',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $account->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_user_presave called',
       'entity_crud_hook_test_entity_presave called for type user',
       'entity_crud_hook_test_user_insert called',
       'entity_crud_hook_test_entity_insert called for type user',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     User::load($account->id());
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_entity_load called for type user',
       'entity_crud_hook_test_user_load called',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     $account->name = 'New name';
     $account->save();
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_user_presave called',
       'entity_crud_hook_test_entity_presave called for type user',
       'entity_crud_hook_test_user_update called',
       'entity_crud_hook_test_entity_update called for type user',
-    ));
+    ]);
 
-    $GLOBALS['entity_crud_hook_test'] = array();
+    $GLOBALS['entity_crud_hook_test'] = [];
     user_delete($account->id());
 
-    $this->assertHookMessageOrder(array(
+    $this->assertHookMessageOrder([
       'entity_crud_hook_test_user_predelete called',
       'entity_crud_hook_test_entity_predelete called for type user',
       'entity_crud_hook_test_user_delete called',
       'entity_crud_hook_test_entity_delete called for type user',
-    ));
+    ]);
   }
 
   /**
@@ -538,7 +538,7 @@ public function testUserHooks() {
   function testEntityRollback() {
     // Create a block.
     try {
-      EntityTest::create(array('name' => 'fail_insert'))->save();
+      EntityTest::create(['name' => 'fail_insert'])->save();
       $this->fail('Expected exception has not been thrown.');
     }
     catch (\Exception $e) {
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php
index e49ee7ea92d69e5d06111ebfd30c3c92786acaef..e37a4e0f89f764d6825c2c9b6758893423efa415 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php
@@ -49,7 +49,7 @@ protected function setUp() {
 
     // Install every entity type's schema that wasn't installed in the parent
     // method.
-    foreach (array_diff_key($this->entityManager->getDefinitions(), array_flip(array('user', 'entity_test'))) as $entity_type_id => $entity_type) {
+    foreach (array_diff_key($this->entityManager->getDefinitions(), array_flip(['user', 'entity_test'])) as $entity_type_id => $entity_type) {
       $this->installEntitySchema($entity_type_id);
     }
   }
@@ -80,7 +80,7 @@ public function testNewEntityType() {
   public function testNoUpdates() {
     // Ensure that the definition update manager reports no updates.
     $this->assertFalse($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that no updates are needed.');
-    $this->assertIdentical($this->entityDefinitionUpdateManager->getChangeSummary(), array(), 'EntityDefinitionUpdateManager reports an empty change summary.');
+    $this->assertIdentical($this->entityDefinitionUpdateManager->getChangeSummary(), [], 'EntityDefinitionUpdateManager reports an empty change summary.');
 
     // Ensure that applyUpdates() runs without error (it's not expected to do
     // anything when there aren't updates).
@@ -99,14 +99,14 @@ public function testEntityTypeUpdateWithoutData() {
     // reports that an update is needed.
     $this->updateEntityTypeToRevisionable();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %entity_type entity type needs to be updated.', ['%entity_type' => $this->entityManager->getDefinition('entity_test_update')->getLabel()]),
         // The revision key is now defined, so the revision field needs to be
         // created.
         t('The %field_name field needs to be installed.', ['%field_name' => 'Revision ID']),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected); //, 'EntityDefinitionUpdateManager reports the expected change summary.');
 
     // Run the update and ensure the revision table is created.
@@ -141,11 +141,11 @@ public function testBaseFieldCreateUpdateDeleteWithoutData() {
     // creates its schema.
     $this->addBaseField();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %field_name field needs to be installed.', ['%field_name' => t('A new base field')]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertTrue($this->database->schema()->fieldExists('entity_test_update', 'new_base_field'), 'Column created in shared table for new_base_field.');
@@ -154,11 +154,11 @@ public function testBaseFieldCreateUpdateDeleteWithoutData() {
     // and the update creates it.
     $this->addBaseFieldIndex();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %field_name field needs to be updated.', ['%field_name' => t('A new base field')]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertTrue($this->database->schema()->indexExists('entity_test_update', 'entity_test_update_field__new_base_field'), 'Index created.');
@@ -167,11 +167,11 @@ public function testBaseFieldCreateUpdateDeleteWithoutData() {
     // update deletes it.
     $this->removeBaseFieldIndex();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %field_name field needs to be updated.', ['%field_name' => t('A new base field')]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertFalse($this->database->schema()->indexExists('entity_test_update', 'entity_test_update_field__new_base_field'), 'Index deleted.');
@@ -181,11 +181,11 @@ public function testBaseFieldCreateUpdateDeleteWithoutData() {
     // accordingly.
     $this->modifyBaseField();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %field_name field needs to be updated.', ['%field_name' => t('A new base field')]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertFalse($this->database->schema()->fieldExists('entity_test_update', 'new_base_field'), 'Original column deleted in shared table for new_base_field.');
@@ -196,11 +196,11 @@ public function testBaseFieldCreateUpdateDeleteWithoutData() {
     // update deletes the schema.
     $this->removeBaseField();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %field_name field needs to be uninstalled.', ['%field_name' => t('A new base field')]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertFalse($this->database->schema()->fieldExists('entity_test_update', 'new_base_field_value'), 'Value column deleted from shared table for new_base_field.');
@@ -215,11 +215,11 @@ public function testBundleFieldCreateUpdateDeleteWithoutData() {
     // creates its schema.
     $this->addBundleField();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %field_name field needs to be installed.', ['%field_name' => t('A new bundle field')]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertTrue($this->database->schema()->tableExists('entity_test_update__new_bundle_field'), 'Dedicated table created for new_bundle_field.');
@@ -229,11 +229,11 @@ public function testBundleFieldCreateUpdateDeleteWithoutData() {
     // accordingly.
     $this->modifyBundleField();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
+    $expected = [
       'entity_test_update' => [
         t('The %field_name field needs to be updated.', ['%field_name' => t('A new bundle field')]),
       ],
-    );
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertTrue($this->database->schema()->fieldExists('entity_test_update__new_bundle_field', 'new_bundle_field_format'), 'Format column created in dedicated table for new_base_field.');
@@ -242,11 +242,11 @@ public function testBundleFieldCreateUpdateDeleteWithoutData() {
     // update deletes the schema.
     $this->removeBundleField();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %field_name field needs to be uninstalled.', ['%field_name' => t('A new bundle field')]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertFalse($this->database->schema()->tableExists('entity_test_update__new_bundle_field'), 'Dedicated table deleted for new_bundle_field.');
@@ -264,7 +264,7 @@ public function testBaseFieldCreateDeleteWithExistingEntities() {
     // Save an entity.
     $name = $this->randomString();
     $storage = $this->entityManager->getStorage('entity_test_update');
-    $entity = $storage->create(array('name' => $name));
+    $entity = $storage->create(['name' => $name]);
     $entity->save();
 
     // Add a base field and run the update. Ensure the base field's column is
@@ -304,7 +304,7 @@ public function testBaseFieldCreateDeleteWithExistingEntities() {
     $this->entityDefinitionUpdateManager->applyUpdates();
     $assert = $schema_handler->fieldExists('entity_test_update', 'new_base_field__shape') && $schema_handler->fieldExists('entity_test_update', 'new_base_field__color');
     $this->assertTrue($assert, 'Columns created again in shared table for new_base_field.');
-    $entity = $storage->create(array('name' => $name));
+    $entity = $storage->create(['name' => $name]);
     $entity->save();
     $this->pass('The new_base_field columns are still nullable');
   }
@@ -321,7 +321,7 @@ public function testBundleFieldCreateDeleteWithExistingEntities() {
     // Save an entity.
     $name = $this->randomString();
     $storage = $this->entityManager->getStorage('entity_test_update');
-    $entity = $storage->create(array('name' => $name));
+    $entity = $storage->create(['name' => $name]);
     $entity->save();
 
     // Add a bundle field and run the update. Ensure the bundle field's table
@@ -345,7 +345,7 @@ public function testBundleFieldCreateDeleteWithExistingEntities() {
     $this->addBundleField('shape_required');
     $this->entityDefinitionUpdateManager->applyUpdates();
     $message = 'The new_bundle_field_shape column is not nullable.';
-    $values = array(
+    $values = [
       'bundle' => $entity->bundle(),
       'deleted' => 0,
       'entity_id' => $entity->id(),
@@ -353,7 +353,7 @@ public function testBundleFieldCreateDeleteWithExistingEntities() {
       'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
       'delta' => 0,
       'new_bundle_field_color' => $this->randomString(),
-    );
+    ];
     try {
       // Try to insert a record without providing a value for the 'not null'
       // column. This should fail.
@@ -388,7 +388,7 @@ public function testBaseFieldDeleteWithExistingData() {
     $this->entityDefinitionUpdateManager->applyUpdates();
 
     // Save an entity with the base field populated.
-    $this->entityManager->getStorage('entity_test_update')->create(array('new_base_field' => 'foo'))->save();
+    $this->entityManager->getStorage('entity_test_update')->create(['new_base_field' => 'foo'])->save();
 
     // Remove the base field and apply updates. It's expected to throw an
     // exception.
@@ -414,7 +414,7 @@ public function testBundleFieldDeleteWithExistingData() {
 
     // Save an entity with the bundle field populated.
     entity_test_create_bundle('custom');
-    $this->entityManager->getStorage('entity_test_update')->create(array('type' => 'test_bundle', 'new_bundle_field' => 'foo'))->save();
+    $this->entityManager->getStorage('entity_test_update')->create(['type' => 'test_bundle', 'new_bundle_field' => 'foo'])->save();
 
     // Remove the bundle field and apply updates. It's expected to throw an
     // exception.
@@ -439,7 +439,7 @@ public function testBaseFieldUpdateWithExistingData() {
     $this->entityDefinitionUpdateManager->applyUpdates();
 
     // Save an entity with the base field populated.
-    $this->entityManager->getStorage('entity_test_update')->create(array('new_base_field' => 'foo'))->save();
+    $this->entityManager->getStorage('entity_test_update')->create(['new_base_field' => 'foo'])->save();
 
     // Change the field's field type and apply updates. It's expected to
     // throw an exception.
@@ -463,7 +463,7 @@ public function testBundleFieldUpdateWithExistingData() {
 
     // Save an entity with the bundle field populated.
     entity_test_create_bundle('custom');
-    $this->entityManager->getStorage('entity_test_update')->create(array('type' => 'test_bundle', 'new_bundle_field' => 'foo'))->save();
+    $this->entityManager->getStorage('entity_test_update')->create(['type' => 'test_bundle', 'new_bundle_field' => 'foo'])->save();
 
     // Change the field's field type and apply updates. It's expected to
     // throw an exception.
@@ -485,11 +485,11 @@ public function testEntityIndexCreateDeleteWithoutData() {
     // update to the entity type.
     $this->addEntityIndex();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %entity_type entity type needs to be updated.', ['%entity_type' => $this->entityManager->getDefinition('entity_test_update')->getLabel()]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
 
     // Run the update and ensure the new index is created.
@@ -500,11 +500,11 @@ public function testEntityIndexCreateDeleteWithoutData() {
     // update to the entity type.
     $this->removeEntityIndex();
     $this->assertTrue($this->entityDefinitionUpdateManager->needsUpdates(), 'EntityDefinitionUpdateManager reports that updates are needed.');
-    $expected = array(
-      'entity_test_update' => array(
+    $expected = [
+      'entity_test_update' => [
         t('The %entity_type entity type needs to be updated.', ['%entity_type' => $this->entityManager->getDefinition('entity_test_update')->getLabel()]),
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($this->entityDefinitionUpdateManager->getChangeSummary(), $expected, 'EntityDefinitionUpdateManager reports the expected change summary.');
 
     // Run the update and ensure the index is deleted.
@@ -530,7 +530,7 @@ public function testEntityIndexCreateDeleteWithoutData() {
   public function testEntityIndexCreateWithData() {
     // Save an entity.
     $name = $this->randomString();
-    $entity = $this->entityManager->getStorage('entity_test_update')->create(array('name' => $name));
+    $entity = $this->entityManager->getStorage('entity_test_update')->create(['name' => $name]);
     $entity->save();
 
     // Add an entity index, run the update. Ensure that the index is created
@@ -732,13 +732,13 @@ public function testCreateIndexUsingEntityStorageSchemaWithData() {
     // Save an entity.
     $name = $this->randomString();
     $storage = $this->entityManager->getStorage('entity_test_update');
-    $entity = $storage->create(array('name' => $name));
+    $entity = $storage->create(['name' => $name]);
     $entity->save();
 
     // Create an index.
-    $indexes = array(
-      'entity_test_update__type_index' => array('type'),
-    );
+    $indexes = [
+      'entity_test_update__type_index' => ['type'],
+    ];
     $this->state->set('entity_test_update.additional_entity_indexes', $indexes);
     $this->entityDefinitionUpdateManager->applyUpdates();
     $this->assertTrue($this->database->schema()->indexExists('entity_test_update', 'entity_test_update__type_index'), "New index 'entity_test_update__type_index' has been created on the 'entity_test_update' table.");
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldDefaultValueTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldDefaultValueTest.php
index c806409f5b59b2e58a905dfb78f7915e689a1707..c300b48e46a8853ebaec038fb43baf185d205252 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldDefaultValueTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldDefaultValueTest.php
@@ -47,9 +47,9 @@ protected function assertDefaultValues($entity_type_id) {
       ->create();
     $definition = $this->entityManager->getDefinition($entity_type_id);
     $langcode_key = $definition->getKey('langcode');
-    $this->assertEqual($entity->{$langcode_key}->value, 'en', SafeMarkup::format('%entity_type: Default language', array('%entity_type' => $entity_type_id)));
-    $this->assertTrue(Uuid::isValid($entity->uuid->value), SafeMarkup::format('%entity_type: Default UUID', array('%entity_type' => $entity_type_id)));
-    $this->assertEqual($entity->name->getValue(), array(), 'Field has one empty value by default.');
+    $this->assertEqual($entity->{$langcode_key}->value, 'en', SafeMarkup::format('%entity_type: Default language', ['%entity_type' => $entity_type_id]));
+    $this->assertTrue(Uuid::isValid($entity->uuid->value), SafeMarkup::format('%entity_type: Default UUID', ['%entity_type' => $entity_type_id]));
+    $this->assertEqual($entity->name->getValue(), [], 'Field has one empty value by default.');
   }
 
   /**
@@ -60,16 +60,16 @@ public function testDefaultValueCallback() {
     // The description field has a default value callback for testing, see
     // entity_test_field_default_value().
     $string = 'description_' . $entity->language()->getId();
-    $expected = array(
-      array(
+    $expected = [
+      [
         'shape' => "shape:0:$string",
         'color' => "color:0:$string",
-      ),
-      array(
+      ],
+      [
         'shape' => "shape:1:$string",
         'color' => "color:1:$string",
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($entity->description->getValue(), $expected);
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php
index 5dc1a948d35f61b745e09401390c3b49b30351de..e0bf6551ffed2008543df11efa310d7ca55802f8 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php
@@ -31,7 +31,7 @@ class EntityFieldTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'text', 'node', 'user', 'field_test');
+  public static $modules = ['filter', 'text', 'node', 'user', 'field_test'];
 
   /**
    * @var string
@@ -63,7 +63,7 @@ protected function setUp() {
     entity_test_install();
 
     // Install required default configuration for filter module.
-    $this->installConfig(array('system', 'filter'));
+    $this->installConfig(['system', 'filter']);
   }
 
   /**
@@ -112,108 +112,108 @@ protected function doTestReadWrite($entity_type) {
     $langcode = 'en';
 
     // Access the name field.
-    $this->assertTrue($entity->name instanceof FieldItemListInterface, format_string('%entity_type: Field implements interface', array('%entity_type' => $entity_type)));
-    $this->assertTrue($entity->name[0] instanceof FieldItemInterface, format_string('%entity_type: Field item implements interface', array('%entity_type' => $entity_type)));
+    $this->assertTrue($entity->name instanceof FieldItemListInterface, format_string('%entity_type: Field implements interface', ['%entity_type' => $entity_type]));
+    $this->assertTrue($entity->name[0] instanceof FieldItemInterface, format_string('%entity_type: Field item implements interface', ['%entity_type' => $entity_type]));
 
-    $this->assertEqual($this->entityName, $entity->name->value, format_string('%entity_type: Name value can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($this->entityName, $entity->name[0]->value, format_string('%entity_type: Name value can be read through list access.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->name->getValue(), array(0 => array('value' => $this->entityName)), format_string('%entity_type: Plain field value returned.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($this->entityName, $entity->name->value, format_string('%entity_type: Name value can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($this->entityName, $entity->name[0]->value, format_string('%entity_type: Name value can be read through list access.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->name->getValue(), [0 => ['value' => $this->entityName]], format_string('%entity_type: Plain field value returned.', ['%entity_type' => $entity_type]));
 
     // Change the name.
     $new_name = $this->randomMachineName();
     $entity->name->value = $new_name;
-    $this->assertEqual($new_name, $entity->name->value, format_string('%entity_type: Name can be updated and read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->name->getValue(), array(0 => array('value' => $new_name)), format_string('%entity_type: Plain field value reflects the update.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($new_name, $entity->name->value, format_string('%entity_type: Name can be updated and read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->name->getValue(), [0 => ['value' => $new_name]], format_string('%entity_type: Plain field value reflects the update.', ['%entity_type' => $entity_type]));
 
     $new_name = $this->randomMachineName();
     $entity->name[0]->value = $new_name;
-    $this->assertEqual($new_name, $entity->name->value, format_string('%entity_type: Name can be updated and read through list access.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($new_name, $entity->name->value, format_string('%entity_type: Name can be updated and read through list access.', ['%entity_type' => $entity_type]));
 
     // Access the user field.
-    $this->assertTrue($entity->user_id instanceof FieldItemListInterface, format_string('%entity_type: Field implements interface', array('%entity_type' => $entity_type)));
-    $this->assertTrue($entity->user_id[0] instanceof FieldItemInterface, format_string('%entity_type: Field item implements interface', array('%entity_type' => $entity_type)));
+    $this->assertTrue($entity->user_id instanceof FieldItemListInterface, format_string('%entity_type: Field implements interface', ['%entity_type' => $entity_type]));
+    $this->assertTrue($entity->user_id[0] instanceof FieldItemInterface, format_string('%entity_type: Field item implements interface', ['%entity_type' => $entity_type]));
 
-    $this->assertEqual($this->entityUser->id(), $entity->user_id->target_id, format_string('%entity_type: User id can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($this->entityUser->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: User name can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($this->entityUser->id(), $entity->user_id->target_id, format_string('%entity_type: User id can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($this->entityUser->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: User name can be read.', ['%entity_type' => $entity_type]));
 
     // Change the assigned user by entity.
     $new_user1 = $this->createUser();
     $entity->user_id->entity = $new_user1;
-    $this->assertEqual($new_user1->id(), $entity->user_id->target_id, format_string('%entity_type: Updated user id can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($new_user1->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: Updated username value can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($new_user1->id(), $entity->user_id->target_id, format_string('%entity_type: Updated user id can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($new_user1->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: Updated username value can be read.', ['%entity_type' => $entity_type]));
 
     // Change the assigned user by id.
     $new_user2 = $this->createUser();
     $entity->user_id->target_id = $new_user2->id();
-    $this->assertEqual($new_user2->id(), $entity->user_id->target_id, format_string('%entity_type: Updated user id can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($new_user2->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: Updated username value can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($new_user2->id(), $entity->user_id->target_id, format_string('%entity_type: Updated user id can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($new_user2->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: Updated username value can be read.', ['%entity_type' => $entity_type]));
 
     // Try unsetting a field property.
     $entity->name->value = NULL;
     $entity->user_id->target_id = NULL;
-    $this->assertNull($entity->name->value, format_string('%entity_type: Name field is not set.', array('%entity_type' => $entity_type)));
-    $this->assertNull($entity->user_id->target_id, format_string('%entity_type: User ID field is not set.', array('%entity_type' => $entity_type)));
-    $this->assertNull($entity->user_id->entity, format_string('%entity_type: User entity field is not set.', array('%entity_type' => $entity_type)));
+    $this->assertNull($entity->name->value, format_string('%entity_type: Name field is not set.', ['%entity_type' => $entity_type]));
+    $this->assertNull($entity->user_id->target_id, format_string('%entity_type: User ID field is not set.', ['%entity_type' => $entity_type]));
+    $this->assertNull($entity->user_id->entity, format_string('%entity_type: User entity field is not set.', ['%entity_type' => $entity_type]));
 
     // Test setting the values via the typed data API works as well.
     // Change the assigned user by entity.
     $entity->user_id->first()->get('entity')->setValue($new_user2);
-    $this->assertEqual($new_user2->id(), $entity->user_id->target_id, format_string('%entity_type: Updated user id can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($new_user2->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: Updated user name value can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($new_user2->id(), $entity->user_id->target_id, format_string('%entity_type: Updated user id can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($new_user2->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: Updated user name value can be read.', ['%entity_type' => $entity_type]));
 
     // Change the assigned user by id.
     $entity->user_id->first()->get('target_id')->setValue($new_user2->id());
-    $this->assertEqual($new_user2->id(), $entity->user_id->target_id, format_string('%entity_type: Updated user id can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($new_user2->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: Updated user name value can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($new_user2->id(), $entity->user_id->target_id, format_string('%entity_type: Updated user id can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($new_user2->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: Updated user name value can be read.', ['%entity_type' => $entity_type]));
 
     // Try unsetting a field.
     $entity->name->first()->get('value')->setValue(NULL);
     $entity->user_id->first()->get('target_id')->setValue(NULL);
-    $this->assertNull($entity->name->value, format_string('%entity_type: Name field is not set.', array('%entity_type' => $entity_type)));
-    $this->assertNull($entity->user_id->target_id, format_string('%entity_type: User ID field is not set.', array('%entity_type' => $entity_type)));
-    $this->assertNull($entity->user_id->entity, format_string('%entity_type: User entity field is not set.', array('%entity_type' => $entity_type)));
+    $this->assertNull($entity->name->value, format_string('%entity_type: Name field is not set.', ['%entity_type' => $entity_type]));
+    $this->assertNull($entity->user_id->target_id, format_string('%entity_type: User ID field is not set.', ['%entity_type' => $entity_type]));
+    $this->assertNull($entity->user_id->entity, format_string('%entity_type: User entity field is not set.', ['%entity_type' => $entity_type]));
 
     // Create a fresh entity so target_id does not get its property object
     // instantiated, then verify setting a new value via typed data API works.
     $entity2 = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
-        'user_id' => array('target_id' => $new_user1->id()),
-      ));
+      ->create([
+        'user_id' => ['target_id' => $new_user1->id()],
+      ]);
     // Access the property object, and set a value.
     $entity2->user_id->first()->get('target_id')->setValue($new_user2->id());
-    $this->assertEqual($new_user2->id(), $entity2->user_id->target_id, format_string('%entity_type: Updated user id can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($new_user2->name->value, $entity2->user_id->entity->name->value, format_string('%entity_type: Updated user name value can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($new_user2->id(), $entity2->user_id->target_id, format_string('%entity_type: Updated user id can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($new_user2->name->value, $entity2->user_id->entity->name->value, format_string('%entity_type: Updated user name value can be read.', ['%entity_type' => $entity_type]));
 
     // Test using isset(), empty() and unset().
     $entity->name->value = 'test unset';
     unset($entity->name->value);
-    $this->assertFalse(isset($entity->name->value), format_string('%entity_type: Name is not set.', array('%entity_type' => $entity_type)));
-    $this->assertFalse(isset($entity->name[0]->value), format_string('%entity_type: Name is not set.', array('%entity_type' => $entity_type)));
-    $this->assertTrue(empty($entity->name->value), format_string('%entity_type: Name is empty.', array('%entity_type' => $entity_type)));
-    $this->assertTrue(empty($entity->name[0]->value), format_string('%entity_type: Name is empty.', array('%entity_type' => $entity_type)));
+    $this->assertFalse(isset($entity->name->value), format_string('%entity_type: Name is not set.', ['%entity_type' => $entity_type]));
+    $this->assertFalse(isset($entity->name[0]->value), format_string('%entity_type: Name is not set.', ['%entity_type' => $entity_type]));
+    $this->assertTrue(empty($entity->name->value), format_string('%entity_type: Name is empty.', ['%entity_type' => $entity_type]));
+    $this->assertTrue(empty($entity->name[0]->value), format_string('%entity_type: Name is empty.', ['%entity_type' => $entity_type]));
 
     $entity->name->value = 'a value';
-    $this->assertTrue(isset($entity->name->value), format_string('%entity_type: Name is set.', array('%entity_type' => $entity_type)));
-    $this->assertTrue(isset($entity->name[0]->value), format_string('%entity_type: Name is set.', array('%entity_type' => $entity_type)));
-    $this->assertFalse(empty($entity->name->value), format_string('%entity_type: Name is not empty.', array('%entity_type' => $entity_type)));
-    $this->assertFalse(empty($entity->name[0]->value), format_string('%entity_type: Name is not empty.', array('%entity_type' => $entity_type)));
-    $this->assertTrue(isset($entity->name[0]), format_string('%entity_type: Name string item is set.', array('%entity_type' => $entity_type)));
-    $this->assertFalse(isset($entity->name[1]), format_string('%entity_type: Second name string item is not set as it does not exist', array('%entity_type' => $entity_type)));
-    $this->assertTrue(isset($entity->name), format_string('%entity_type: Name field is set.', array('%entity_type' => $entity_type)));
-    $this->assertFalse(isset($entity->nameInvalid), format_string('%entity_type: Not existing field is not set.', array('%entity_type' => $entity_type)));
+    $this->assertTrue(isset($entity->name->value), format_string('%entity_type: Name is set.', ['%entity_type' => $entity_type]));
+    $this->assertTrue(isset($entity->name[0]->value), format_string('%entity_type: Name is set.', ['%entity_type' => $entity_type]));
+    $this->assertFalse(empty($entity->name->value), format_string('%entity_type: Name is not empty.', ['%entity_type' => $entity_type]));
+    $this->assertFalse(empty($entity->name[0]->value), format_string('%entity_type: Name is not empty.', ['%entity_type' => $entity_type]));
+    $this->assertTrue(isset($entity->name[0]), format_string('%entity_type: Name string item is set.', ['%entity_type' => $entity_type]));
+    $this->assertFalse(isset($entity->name[1]), format_string('%entity_type: Second name string item is not set as it does not exist', ['%entity_type' => $entity_type]));
+    $this->assertTrue(isset($entity->name), format_string('%entity_type: Name field is set.', ['%entity_type' => $entity_type]));
+    $this->assertFalse(isset($entity->nameInvalid), format_string('%entity_type: Not existing field is not set.', ['%entity_type' => $entity_type]));
 
     unset($entity->name[0]);
-    $this->assertFalse(isset($entity->name[0]), format_string('%entity_type: Name field item is not set.', array('%entity_type' => $entity_type)));
-    $this->assertFalse(isset($entity->name[0]->value), format_string('%entity_type: Name is not set.', array('%entity_type' => $entity_type)));
-    $this->assertFalse(isset($entity->name->value), format_string('%entity_type: Name is not set.', array('%entity_type' => $entity_type)));
+    $this->assertFalse(isset($entity->name[0]), format_string('%entity_type: Name field item is not set.', ['%entity_type' => $entity_type]));
+    $this->assertFalse(isset($entity->name[0]->value), format_string('%entity_type: Name is not set.', ['%entity_type' => $entity_type]));
+    $this->assertFalse(isset($entity->name->value), format_string('%entity_type: Name is not set.', ['%entity_type' => $entity_type]));
 
     // Test emptying a field by assigning an empty value. NULL and array()
     // behave the same.
-    foreach ([NULL, array(), 'unset'] as $empty) {
+    foreach ([NULL, [], 'unset'] as $empty) {
       // Make sure a value is present
       $entity->name->value = 'a value';
-      $this->assertTrue(isset($entity->name->value), format_string('%entity_type: Name is set.', array('%entity_type' => $entity_type)));
+      $this->assertTrue(isset($entity->name->value), format_string('%entity_type: Name is set.', ['%entity_type' => $entity_type]));
       // Now, empty the field.
       if ($empty === 'unset') {
         unset($entity->name);
@@ -221,36 +221,36 @@ protected function doTestReadWrite($entity_type) {
       else {
         $entity->name = $empty;
       }
-      $this->assertTrue(isset($entity->name), format_string('%entity_type: Name field is set.', array('%entity_type' => $entity_type)));
-      $this->assertTrue($entity->name->isEmpty(), format_string('%entity_type: Name field is set.', array('%entity_type' => $entity_type)));
-      $this->assertIdentical(count($entity->name), 0, format_string('%entity_type: Name field contains no items.', array('%entity_type' => $entity_type)));
-      $this->assertIdentical($entity->name->getValue(), array(), format_string('%entity_type: Name field value is an empty array.', array('%entity_type' => $entity_type)));
-      $this->assertFalse(isset($entity->name[0]), format_string('%entity_type: Name field item is not set.', array('%entity_type' => $entity_type)));
-      $this->assertFalse(isset($entity->name[0]->value), format_string('%entity_type: First name item value is not set.', array('%entity_type' => $entity_type)));
-      $this->assertFalse(isset($entity->name->value), format_string('%entity_type: Name value is not set.', array('%entity_type' => $entity_type)));
+      $this->assertTrue(isset($entity->name), format_string('%entity_type: Name field is set.', ['%entity_type' => $entity_type]));
+      $this->assertTrue($entity->name->isEmpty(), format_string('%entity_type: Name field is set.', ['%entity_type' => $entity_type]));
+      $this->assertIdentical(count($entity->name), 0, format_string('%entity_type: Name field contains no items.', ['%entity_type' => $entity_type]));
+      $this->assertIdentical($entity->name->getValue(), [], format_string('%entity_type: Name field value is an empty array.', ['%entity_type' => $entity_type]));
+      $this->assertFalse(isset($entity->name[0]), format_string('%entity_type: Name field item is not set.', ['%entity_type' => $entity_type]));
+      $this->assertFalse(isset($entity->name[0]->value), format_string('%entity_type: First name item value is not set.', ['%entity_type' => $entity_type]));
+      $this->assertFalse(isset($entity->name->value), format_string('%entity_type: Name value is not set.', ['%entity_type' => $entity_type]));
     }
 
     // Access the language field.
     $langcode_key = $this->entityManager->getDefinition($entity_type)->getKey('langcode');
-    $this->assertEqual($langcode, $entity->{$langcode_key}->value, format_string('%entity_type: Language code can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual(\Drupal::languageManager()->getLanguage($langcode), $entity->{$langcode_key}->language, format_string('%entity_type: Language object can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($langcode, $entity->{$langcode_key}->value, format_string('%entity_type: Language code can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual(\Drupal::languageManager()->getLanguage($langcode), $entity->{$langcode_key}->language, format_string('%entity_type: Language object can be read.', ['%entity_type' => $entity_type]));
 
     // Change the language by code.
     $entity->{$langcode_key}->value = \Drupal::languageManager()->getDefaultLanguage()->getId();
-    $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage()->getId(), $entity->{$langcode_key}->value, format_string('%entity_type: Language code can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage(), $entity->{$langcode_key}->language, format_string('%entity_type: Language object can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage()->getId(), $entity->{$langcode_key}->value, format_string('%entity_type: Language code can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage(), $entity->{$langcode_key}->language, format_string('%entity_type: Language object can be read.', ['%entity_type' => $entity_type]));
 
     // Revert language by code then try setting it by language object.
     $entity->{$langcode_key}->value = $langcode;
     $entity->{$langcode_key}->language = \Drupal::languageManager()->getDefaultLanguage();
-    $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage()->getId(), $entity->{$langcode_key}->value, format_string('%entity_type: Language code can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage(), $entity->{$langcode_key}->language, format_string('%entity_type: Language object can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage()->getId(), $entity->{$langcode_key}->value, format_string('%entity_type: Language code can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual(\Drupal::languageManager()->getDefaultLanguage(), $entity->{$langcode_key}->language, format_string('%entity_type: Language object can be read.', ['%entity_type' => $entity_type]));
 
     // Access the text field and test updating.
-    $this->assertEqual($entity->field_test_text->value, $this->entityFieldText, format_string('%entity_type: Text field can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entity->field_test_text->value, $this->entityFieldText, format_string('%entity_type: Text field can be read.', ['%entity_type' => $entity_type]));
     $new_text = $this->randomMachineName();
     $entity->field_test_text->value = $new_text;
-    $this->assertEqual($entity->field_test_text->value, $new_text, format_string('%entity_type: Updated text field can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entity->field_test_text->value, $new_text, format_string('%entity_type: Updated text field can be read.', ['%entity_type' => $entity_type]));
 
     // Test creating the entity by passing in plain values.
     $this->entityName = $this->randomMachineName();
@@ -262,98 +262,98 @@ protected function doTestReadWrite($entity_type) {
 
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'name' => $name_item,
         'user_id' => $user_item,
         'field_test_text' => $text_item,
-      ));
-    $this->assertEqual($this->entityName, $entity->name->value, format_string('%entity_type: Name value can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($this->entityUser->id(), $entity->user_id->target_id, format_string('%entity_type: User id can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($this->entityUser->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: User name can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($this->entityFieldText, $entity->field_test_text->value, format_string('%entity_type: Text field can be read.', array('%entity_type' => $entity_type)));
+      ]);
+    $this->assertEqual($this->entityName, $entity->name->value, format_string('%entity_type: Name value can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($this->entityUser->id(), $entity->user_id->target_id, format_string('%entity_type: User id can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($this->entityUser->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: User name can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($this->entityFieldText, $entity->field_test_text->value, format_string('%entity_type: Text field can be read.', ['%entity_type' => $entity_type]));
 
     // Tests copying field values by assigning the TypedData objects.
     $entity2 = $this->createTestEntity($entity_type);
     $entity2->name = $entity->name;
     $entity2->user_id = $entity->user_id;
     $entity2->field_test_text = $entity->field_test_text;
-    $this->assertFalse($entity->name === $entity2->name, format_string('%entity_type: Copying properties results in a different field object.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->name->value, $entity2->name->value, format_string('%entity_type: Name field copied.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->user_id->target_id, $entity2->user_id->target_id, format_string('%entity_type: User id field copied.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->field_test_text->value, $entity2->field_test_text->value, format_string('%entity_type: Text field copied.', array('%entity_type' => $entity_type)));
+    $this->assertFalse($entity->name === $entity2->name, format_string('%entity_type: Copying properties results in a different field object.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->name->value, $entity2->name->value, format_string('%entity_type: Name field copied.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->user_id->target_id, $entity2->user_id->target_id, format_string('%entity_type: User id field copied.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->field_test_text->value, $entity2->field_test_text->value, format_string('%entity_type: Text field copied.', ['%entity_type' => $entity_type]));
 
     // Tests that assigning TypedData objects to non-field properties keeps the
     // assigned value as is.
     $entity2 = $this->createTestEntity($entity_type);
     $entity2->_not_a_field = $entity->name;
-    $this->assertTrue($entity2->_not_a_field === $entity->name, format_string('%entity_type: Typed data objects can be copied to non-field properties as is.', array('%entity_type' => $entity_type)));
+    $this->assertTrue($entity2->_not_a_field === $entity->name, format_string('%entity_type: Typed data objects can be copied to non-field properties as is.', ['%entity_type' => $entity_type]));
 
     // Tests adding a value to a field item list.
     $entity->name[] = 'Another name';
-    $this->assertEqual($entity->name[1]->value, 'Another name', format_string('%entity_type: List item added via [] and the first property.', array('%entity_type' => $entity_type)));
-    $entity->name[] = array('value' => 'Third name');
-    $this->assertEqual($entity->name[2]->value, 'Third name', format_string('%entity_type: List item added via [] and an array of properties.', array('%entity_type' => $entity_type)));
-    $entity->name[3] = array('value' => 'Fourth name');
-    $this->assertEqual($entity->name[3]->value, 'Fourth name', format_string('%entity_type: List item added via offset and an array of properties.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entity->name[1]->value, 'Another name', format_string('%entity_type: List item added via [] and the first property.', ['%entity_type' => $entity_type]));
+    $entity->name[] = ['value' => 'Third name'];
+    $this->assertEqual($entity->name[2]->value, 'Third name', format_string('%entity_type: List item added via [] and an array of properties.', ['%entity_type' => $entity_type]));
+    $entity->name[3] = ['value' => 'Fourth name'];
+    $this->assertEqual($entity->name[3]->value, 'Fourth name', format_string('%entity_type: List item added via offset and an array of properties.', ['%entity_type' => $entity_type]));
     unset($entity->name[3]);
 
     // Test removing and empty-ing list items.
-    $this->assertEqual(count($entity->name), 3, format_string('%entity_type: List has 3 items.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entity->name), 3, format_string('%entity_type: List has 3 items.', ['%entity_type' => $entity_type]));
     unset($entity->name[1]);
-    $this->assertEqual(count($entity->name), 2, format_string('%entity_type: Second list item has been removed.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->name[1]->value, 'Third name', format_string('%entity_type: The subsequent items have been shifted up.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->name[1]->getName(), 1, format_string('%entity_type: The items names have been updated to their new delta.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entity->name), 2, format_string('%entity_type: Second list item has been removed.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->name[1]->value, 'Third name', format_string('%entity_type: The subsequent items have been shifted up.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->name[1]->getName(), 1, format_string('%entity_type: The items names have been updated to their new delta.', ['%entity_type' => $entity_type]));
     $entity->name[1] = NULL;
-    $this->assertEqual(count($entity->name), 2, format_string('%entity_type: Assigning NULL does not reduce array count.', array('%entity_type' => $entity_type)));
-    $this->assertTrue($entity->name[1]->isEmpty(), format_string('%entity_type: Assigning NULL empties the item.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entity->name), 2, format_string('%entity_type: Assigning NULL does not reduce array count.', ['%entity_type' => $entity_type]));
+    $this->assertTrue($entity->name[1]->isEmpty(), format_string('%entity_type: Assigning NULL empties the item.', ['%entity_type' => $entity_type]));
 
     // Test using isEmpty().
     unset($entity->name[1]);
-    $this->assertFalse($entity->name[0]->isEmpty(), format_string('%entity_type: Name item is not empty.', array('%entity_type' => $entity_type)));
+    $this->assertFalse($entity->name[0]->isEmpty(), format_string('%entity_type: Name item is not empty.', ['%entity_type' => $entity_type]));
     $entity->name->value = NULL;
-    $this->assertTrue($entity->name[0]->isEmpty(), format_string('%entity_type: Name item is empty.', array('%entity_type' => $entity_type)));
-    $this->assertTrue($entity->name->isEmpty(), format_string('%entity_type: Name field is empty.', array('%entity_type' => $entity_type)));
-    $this->assertEqual(count($entity->name), 1, format_string('%entity_type: Empty item is considered when counting.', array('%entity_type' => $entity_type)));
-    $this->assertEqual(count(iterator_to_array($entity->name->getIterator())), count($entity->name), format_string('%entity_type: Count matches iterator count.', array('%entity_type' => $entity_type)));
-    $this->assertTrue($entity->name->getValue() === array(0 => array('value' => NULL)), format_string('%entity_type: Name field value contains a NULL value.', array('%entity_type' => $entity_type)));
+    $this->assertTrue($entity->name[0]->isEmpty(), format_string('%entity_type: Name item is empty.', ['%entity_type' => $entity_type]));
+    $this->assertTrue($entity->name->isEmpty(), format_string('%entity_type: Name field is empty.', ['%entity_type' => $entity_type]));
+    $this->assertEqual(count($entity->name), 1, format_string('%entity_type: Empty item is considered when counting.', ['%entity_type' => $entity_type]));
+    $this->assertEqual(count(iterator_to_array($entity->name->getIterator())), count($entity->name), format_string('%entity_type: Count matches iterator count.', ['%entity_type' => $entity_type]));
+    $this->assertTrue($entity->name->getValue() === [0 => ['value' => NULL]], format_string('%entity_type: Name field value contains a NULL value.', ['%entity_type' => $entity_type]));
 
     // Test using filterEmptyItems().
-    $entity->name = array(NULL, 'foo');
-    $this->assertEqual(count($entity->name), 2, format_string('%entity_type: List has 2 items.', array('%entity_type' => $entity_type)));
+    $entity->name = [NULL, 'foo'];
+    $this->assertEqual(count($entity->name), 2, format_string('%entity_type: List has 2 items.', ['%entity_type' => $entity_type]));
     $entity->name->filterEmptyItems();
-    $this->assertEqual(count($entity->name), 1, format_string('%entity_type: The empty item was removed.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->name[0]->value, 'foo', format_string('%entity_type: The items were renumbered.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($entity->name[0]->getName(), 0, format_string('%entity_type: The deltas were updated in the items.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entity->name), 1, format_string('%entity_type: The empty item was removed.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->name[0]->value, 'foo', format_string('%entity_type: The items were renumbered.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($entity->name[0]->getName(), 0, format_string('%entity_type: The deltas were updated in the items.', ['%entity_type' => $entity_type]));
 
     // Test get and set field values.
     $entity->name = 'foo';
-    $this->assertEqual($entity->name[0]->toArray(), array('value' => 'foo'), format_string('%entity_type: Field value has been retrieved via toArray()', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entity->name[0]->toArray(), ['value' => 'foo'], format_string('%entity_type: Field value has been retrieved via toArray()', ['%entity_type' => $entity_type]));
 
     $values = $entity->toArray();
-    $this->assertEqual($values['name'], array(0 => array('value' => 'foo')), format_string('%entity_type: Field value has been retrieved via toArray() from an entity.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($values['name'], [0 => ['value' => 'foo']], format_string('%entity_type: Field value has been retrieved via toArray() from an entity.', ['%entity_type' => $entity_type]));
 
     // Make sure the user id can be set to zero.
     $user_item[0]['target_id'] = 0;
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'name' => $name_item,
         'user_id' => $user_item,
         'field_test_text' => $text_item,
-      ));
-    $this->assertNotNull($entity->user_id->target_id, format_string('%entity_type: User id is not NULL', array('%entity_type' => $entity_type)));
-    $this->assertIdentical($entity->user_id->target_id, 0, format_string('%entity_type: User id has been set to 0', array('%entity_type' => $entity_type)));
+      ]);
+    $this->assertNotNull($entity->user_id->target_id, format_string('%entity_type: User id is not NULL', ['%entity_type' => $entity_type]));
+    $this->assertIdentical($entity->user_id->target_id, 0, format_string('%entity_type: User id has been set to 0', ['%entity_type' => $entity_type]));
 
     // Test setting the ID with the value only.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'name' => $name_item,
         'user_id' => 0,
         'field_test_text' => $text_item,
-      ));
-    $this->assertNotNull($entity->user_id->target_id, format_string('%entity_type: User id is not NULL', array('%entity_type' => $entity_type)));
-    $this->assertIdentical($entity->user_id->target_id, 0, format_string('%entity_type: User id has been set to 0', array('%entity_type' => $entity_type)));
+      ]);
+    $this->assertNotNull($entity->user_id->target_id, format_string('%entity_type: User id is not NULL', ['%entity_type' => $entity_type]));
+    $this->assertIdentical($entity->user_id->target_id, 0, format_string('%entity_type: User id has been set to 0', ['%entity_type' => $entity_type]));
   }
 
   /**
@@ -376,21 +376,21 @@ protected function doTestSave($entity_type) {
     $langcode_key = $this->entityManager->getDefinition($entity_type)->getKey('langcode');
     $entity = $this->createTestEntity($entity_type);
     $entity->save();
-    $this->assertTrue((bool) $entity->id(), format_string('%entity_type: Entity has received an id.', array('%entity_type' => $entity_type)));
+    $this->assertTrue((bool) $entity->id(), format_string('%entity_type: Entity has received an id.', ['%entity_type' => $entity_type]));
 
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
       ->load($entity->id());
-    $this->assertTrue((bool) $entity->id(), format_string('%entity_type: Entity loaded.', array('%entity_type' => $entity_type)));
+    $this->assertTrue((bool) $entity->id(), format_string('%entity_type: Entity loaded.', ['%entity_type' => $entity_type]));
 
     // Access the name field.
-    $this->assertEqual(1, $entity->id->value, format_string('%entity_type: ID value can be read.', array('%entity_type' => $entity_type)));
-    $this->assertTrue(is_string($entity->uuid->value), format_string('%entity_type: UUID value can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual('en', $entity->{$langcode_key}->value, format_string('%entity_type: Language code can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual(\Drupal::languageManager()->getLanguage('en'), $entity->{$langcode_key}->language, format_string('%entity_type: Language object can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($this->entityUser->id(), $entity->user_id->target_id, format_string('%entity_type: User id can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($this->entityUser->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: User name can be read.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($this->entityFieldText, $entity->field_test_text->value, format_string('%entity_type: Text field can be read.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(1, $entity->id->value, format_string('%entity_type: ID value can be read.', ['%entity_type' => $entity_type]));
+    $this->assertTrue(is_string($entity->uuid->value), format_string('%entity_type: UUID value can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual('en', $entity->{$langcode_key}->value, format_string('%entity_type: Language code can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual(\Drupal::languageManager()->getLanguage('en'), $entity->{$langcode_key}->language, format_string('%entity_type: Language object can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($this->entityUser->id(), $entity->user_id->target_id, format_string('%entity_type: User id can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($this->entityUser->getUsername(), $entity->user_id->entity->name->value, format_string('%entity_type: User name can be read.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($this->entityFieldText, $entity->field_test_text->value, format_string('%entity_type: Text field can be read.', ['%entity_type' => $entity_type]));
   }
 
   /**
@@ -532,8 +532,8 @@ protected function doTestIterator($entity_type) {
     }
 
     $fields = $entity->getFields();
-    $this->assertEqual(array_keys($fields), array_keys($entity->getTypedData()->getDataDefinition()->getPropertyDefinitions()), format_string('%entity_type: All fields returned.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($fields, iterator_to_array($entity->getIterator()), format_string('%entity_type: Entity iterator iterates over all fields.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(array_keys($fields), array_keys($entity->getTypedData()->getDataDefinition()->getPropertyDefinitions()), format_string('%entity_type: All fields returned.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($fields, iterator_to_array($entity->getIterator()), format_string('%entity_type: Entity iterator iterates over all fields.', ['%entity_type' => $entity_type]));
   }
 
   /**
@@ -558,12 +558,12 @@ protected function doTestDataStructureInterfaces($entity_type) {
     // Test using the whole tree of typed data by navigating through the tree of
     // contained properties and getting all contained strings, limited by a
     // certain depth.
-    $strings = array();
+    $strings = [];
     $this->getContainedStrings($entity->getTypedData(), 0, $strings);
 
     // @todo: Once the user entity has defined properties this should contain
     // the user name and other user entity strings as well.
-    $target_strings = array(
+    $target_strings = [
       $entity->uuid->value,
       'en',
       $this->entityName,
@@ -572,7 +572,7 @@ protected function doTestDataStructureInterfaces($entity_type) {
       $this->entityFieldText,
       // Field format.
       NULL,
-    );
+    ];
 
     if ($entity instanceof RevisionLogInterface) {
       // Adding empty string for revision message.
@@ -581,7 +581,7 @@ protected function doTestDataStructureInterfaces($entity_type) {
 
     asort($strings);
     asort($target_strings);
-    $this->assertEqual(array_values($strings), array_values($target_strings), format_string('%entity_type: All contained strings found.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(array_values($strings), array_values($target_strings), format_string('%entity_type: All contained strings found.', ['%entity_type' => $entity_type]));
   }
 
   /**
@@ -629,10 +629,10 @@ public function testDataTypes() {
    * @see entity_test_entity_base_field_info_alter()
    */
   public function testBaseFieldNonExistingBaseField() {
-    $this->entityManager->getStorage('node_type')->create(array(
+    $this->entityManager->getStorage('node_type')->create([
       'type' => 'page',
       'name' => 'page',
-    ))->save();
+    ])->save();
     $this->entityManager->clearCachedFieldDefinitions();
     $fields = $this->entityManager->getFieldDefinitions('node', 'page');
     $override = $fields['status']->getConfig('page');
@@ -686,7 +686,7 @@ public function testEntityConstraintValidation() {
       ->setLabel('Test entity')
       ->setSetting('target_type', 'entity_test');
     $reference_field = \Drupal::typedDataManager()->create($definition);
-    $reference = $reference_field->appendItem(array('entity' => $entity))->get('entity');
+    $reference = $reference_field->appendItem(['entity' => $entity])->get('entity');
 
     // Test validation the typed data object.
     $violations = $reference->validate();
@@ -705,14 +705,14 @@ public function testEntityConstraintValidation() {
     $this->assertEqual($violations->count(), 1);
 
     // Test bundle validation.
-    NodeType::create(array('type' => 'article'))
+    NodeType::create(['type' => 'article'])
       ->save();
     $definition = BaseFieldDefinition::create('entity_reference')
       ->setLabel('Test entity')
       ->setSetting('target_type', 'node')
       ->setSetting('handler_settings', ['target_bundles' => ['article' => 'article']]);
     $reference_field = \Drupal::TypedDataManager()->create($definition);
-    $reference_field->appendItem(array('entity' => $node));
+    $reference_field->appendItem(['entity' => $node]);
     $violations = $reference_field->validate();
     $this->assertEqual($violations->count(), 1);
 
@@ -749,14 +749,14 @@ protected function doTestComputedProperties($entity_type) {
     $entity->field_test_text->format = filter_default_format();
 
     $target = "<p>The &lt;strong&gt;text&lt;/strong&gt; text to filter.</p>\n";
-    $this->assertEqual($entity->field_test_text->processed, $target, format_string('%entity_type: Text is processed with the default filter.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entity->field_test_text->processed, $target, format_string('%entity_type: Text is processed with the default filter.', ['%entity_type' => $entity_type]));
 
     // Save and load entity and make sure it still works.
     $entity->save();
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
       ->load($entity->id());
-    $this->assertEqual($entity->field_test_text->processed, $target, format_string('%entity_type: Text is processed with the default filter.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entity->field_test_text->processed, $target, format_string('%entity_type: Text is processed with the default filter.', ['%entity_type' => $entity_type]));
   }
 
 }
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityKernelTestBase.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityKernelTestBase.php
index 4b08a56f82ae4fdf9670f748c01d95899e21cbaf..f7108d53b17d1bbfdbf02e24a84a47131642414e 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityKernelTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityKernelTestBase.php
@@ -31,7 +31,7 @@ abstract class EntityKernelTestBase extends KernelTestBase {
    *
    * @var array
    */
-  protected $generatedIds = array();
+  protected $generatedIds = [];
 
   /**
    * The state service.
@@ -62,7 +62,7 @@ protected function setUp() {
         // Only check the modules, if the $modules property was not inherited.
         $rp = new \ReflectionProperty($class, 'modules');
         if ($rp->class == $class) {
-          foreach (array_intersect(array('node', 'comment'), $class::$modules) as $module) {
+          foreach (array_intersect(['node', 'comment'], $class::$modules) as $module) {
             $this->installEntitySchema($module);
           }
           if (in_array('forum', $class::$modules, TRUE)) {
@@ -79,7 +79,7 @@ protected function setUp() {
       $class = get_parent_class($class);
     }
 
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
   }
 
   /**
@@ -93,22 +93,22 @@ protected function setUp() {
    * @return \Drupal\user\Entity\User
    *   The created user entity.
    */
-  protected function createUser($values = array(), $permissions = array()) {
+  protected function createUser($values = [], $permissions = []) {
     if ($permissions) {
       // Create a new role and apply permissions to it.
-      $role = Role::create(array(
+      $role = Role::create([
         'id' => strtolower($this->randomMachineName(8)),
         'label' => $this->randomMachineName(8),
-      ));
+      ]);
       $role->save();
       user_role_grant_permissions($role->id(), $permissions);
       $values['roles'][] = $role->id();
     }
 
-    $account = User::create($values + array(
+    $account = User::create($values + [
       'name' => $this->randomMachineName(),
       'status' => 1,
-    ));
+    ]);
     $account->enforceIsNew();
     $account->save();
     return $account;
@@ -125,7 +125,7 @@ protected function createUser($values = array(), $permissions = array()) {
    */
   protected function reloadEntity(EntityInterface $entity) {
     $controller = $this->entityManager->getStorage($entity->getEntityTypeId());
-    $controller->resetCache(array($entity->id()));
+    $controller->resetCache([$entity->id()]);
     return $controller->load($entity->id());
   }
 
@@ -138,7 +138,7 @@ protected function reloadEntity(EntityInterface $entity) {
   protected function getHooksInfo() {
     $key = 'entity_test.hooks';
     $hooks = $this->state->get($key);
-    $this->state->set($key, array());
+    $this->state->set($key, []);
     return $hooks;
   }
 
@@ -149,7 +149,7 @@ protected function getHooksInfo() {
    *   The module to install.
    */
   protected function installModule($module) {
-    $this->enableModules(array($module));
+    $this->enableModules([$module]);
     $this->refreshServices();
   }
 
@@ -160,7 +160,7 @@ protected function installModule($module) {
    *   The module to uninstall.
    */
   protected function uninstallModule($module) {
-    $this->disableModules(array($module));
+    $this->disableModules([$module]);
     $this->refreshServices();
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityLanguageTestBase.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityLanguageTestBase.php
index 59510bac24891d2dd2b0fb4353425232b7c06716..570aa984465f8df93fb311724d9bf2d1ee293887 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityLanguageTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityLanguageTestBase.php
@@ -40,7 +40,7 @@ abstract class EntityLanguageTestBase extends EntityKernelTestBase {
    */
   protected $untranslatableFieldName;
 
-  public static $modules = array('language', 'entity_test');
+  public static $modules = ['language', 'entity_test'];
 
   protected function setUp() {
     parent::setUp();
@@ -54,7 +54,7 @@ protected function setUp() {
       }
     }
 
-    $this->installConfig(array('language'));
+    $this->installConfig(['language']);
 
     // Create the test field.
     module_load_install('entity_test');
@@ -71,12 +71,12 @@ protected function setUp() {
 
     // Create field fields in all entity variations.
     foreach (entity_test_entity_types() as $entity_type) {
-      FieldStorageConfig::create(array(
+      FieldStorageConfig::create([
         'field_name' => $this->fieldName,
         'entity_type' => $entity_type,
         'type' => 'text',
         'cardinality' => 4,
-      ))->save();
+      ])->save();
       FieldConfig::create([
         'field_name' => $this->fieldName,
         'entity_type' => $entity_type,
@@ -84,12 +84,12 @@ protected function setUp() {
         'translatable' => TRUE,
       ])->save();
 
-      FieldStorageConfig::create(array(
+      FieldStorageConfig::create([
         'field_name' => $this->untranslatableFieldName,
         'entity_type' => $entity_type,
         'type' => 'text',
         'cardinality' => 4,
-      ))->save();
+      ])->save();
       FieldConfig::create([
         'field_name' => $this->untranslatableFieldName,
         'entity_type' => $entity_type,
@@ -99,16 +99,16 @@ protected function setUp() {
     }
 
     // Create the default languages.
-    $this->installConfig(array('language'));
+    $this->installConfig(['language']);
 
     // Create test languages.
-    $this->langcodes = array();
+    $this->langcodes = [];
     for ($i = 0; $i < 3; ++$i) {
-      $language = ConfigurableLanguage::create(array(
+      $language = ConfigurableLanguage::create([
         'id' => 'l' . $i,
         'label' => $this->randomString(),
         'weight' => $i,
-      ));
+      ]);
       $this->langcodes[$i] = $language->getId();
       $language->save();
     }
@@ -121,7 +121,7 @@ protected function setUp() {
    *   The type of the entity fields are attached to.
    */
   protected function toggleFieldTranslatability($entity_type, $bundle) {
-    $fields = array($this->fieldName, $this->untranslatableFieldName);
+    $fields = [$this->fieldName, $this->untranslatableFieldName];
     foreach ($fields as $field_name) {
       $field = FieldConfig::loadByName($entity_type, $bundle, $field_name);
       $translatable = !$field->isTranslatable();
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityNonRevisionableTranslatableFieldTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityNonRevisionableTranslatableFieldTest.php
index da6ec6644c4b6217a85a26ecefe4cb3574cbcff7..bab52b0fe326eacf0c2ebaa1c854d3a3b8288161 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityNonRevisionableTranslatableFieldTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityNonRevisionableTranslatableFieldTest.php
@@ -14,7 +14,7 @@ class EntityNonRevisionableTranslatableFieldTest extends EntityKernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('entity_test', 'language', 'content_translation');
+  public static $modules = ['entity_test', 'language', 'content_translation'];
 
   protected function setUp() {
     parent::setUp();
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryAggregateTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryAggregateTest.php
index 819445d152ec37ec48755eadd47897ba234d3a71..b6362fbcae6f4a6f42d7509cfd1b71cb76f0a8c7 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryAggregateTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryAggregateTest.php
@@ -18,7 +18,7 @@ class EntityQueryAggregateTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array();
+  public static $modules = [];
 
   /**
    * The entity_test storage to create the test entities.
@@ -50,12 +50,12 @@ protected function setUp() {
     // Add some fieldapi fields to be used in the test.
     for ($i = 1; $i <= 2; $i++) {
       $field_name = 'field_test_' . $i;
-      FieldStorageConfig::create(array(
+      FieldStorageConfig::create([
         'field_name' => $field_name,
         'entity_type' => 'entity_test',
         'type' => 'integer',
         'cardinality' => 2,
-      ))->save();
+      ])->save();
       FieldConfig::create([
         'field_name' => $field_name,
         'entity_type' => 'entity_test',
@@ -63,53 +63,53 @@ protected function setUp() {
       ])->save();
     }
 
-    $entity = $this->entityStorage->create(array(
+    $entity = $this->entityStorage->create([
       'id' => 1,
       'user_id' => 1,
       'field_test_1' => 1,
       'field_test_2' => 2,
-    ));
+    ]);
     $entity->enforceIsNew();
     $entity->save();
 
-    $entity = $this->entityStorage->create(array(
+    $entity = $this->entityStorage->create([
       'id' => 2,
       'user_id' => 2,
       'field_test_1' => 1,
       'field_test_2' => 7,
-    ));
+    ]);
     $entity->enforceIsNew();
     $entity->save();
-    $entity = $this->entityStorage->create(array(
+    $entity = $this->entityStorage->create([
       'id' => 3,
       'user_id' => 2,
       'field_test_1' => 2,
       'field_test_2' => 1,
-    ));
+    ]);
     $entity->enforceIsNew();
     $entity->save();
-    $entity = $this->entityStorage->create(array(
+    $entity = $this->entityStorage->create([
       'id' => 4,
       'user_id' => 2,
       'field_test_1' => 2,
       'field_test_2' => 8,
-    ));
+    ]);
     $entity->enforceIsNew();
     $entity->save();
-    $entity = $this->entityStorage->create(array(
+    $entity = $this->entityStorage->create([
       'id' => 5,
       'user_id' => 3,
       'field_test_1' => 2,
       'field_test_2' => 2,
-    ));
+    ]);
     $entity->enforceIsNew();
     $entity->save();
-    $entity = $this->entityStorage->create(array(
+    $entity = $this->entityStorage->create([
       'id' => 6,
       'user_id' => 3,
       'field_test_1' => 3,
       'field_test_2' => 8,
-    ));
+    ]);
     $entity->enforceIsNew();
     $entity->save();
 
@@ -124,18 +124,18 @@ public function testAggregation() {
       ->groupBy('user_id')
       ->execute();
 
-    $this->assertResults(array(
-      array('user_id' => 1),
-      array('user_id' => 2),
-      array('user_id' => 3),
-    ));
+    $this->assertResults([
+      ['user_id' => 1],
+      ['user_id' => 2],
+      ['user_id' => 3],
+    ]);
 
-    $function_expected = array();
-    $function_expected['count'] = array(array('id_count' => 6));
-    $function_expected['min'] = array(array('id_min' => 1));
-    $function_expected['max'] = array(array('id_max' => 6));
-    $function_expected['sum'] = array(array('id_sum' => 21));
-    $function_expected['avg'] = array(array('id_avg' => (21.0 / 6.0)));
+    $function_expected = [];
+    $function_expected['count'] = [['id_count' => 6]];
+    $function_expected['min'] = [['id_min' => 1]];
+    $function_expected['max'] = [['id_max' => 6]];
+    $function_expected['sum'] = [['id_sum' => 21]];
+    $function_expected['avg'] = [['id_avg' => (21.0 / 6.0)]];
 
     // Apply a simple aggregation for different aggregation functions.
     foreach ($function_expected as $aggregation_function => $expected) {
@@ -150,11 +150,11 @@ public function testAggregation() {
       ->aggregate('id', 'COUNT')
       ->groupBy('user_id')
       ->execute();
-    $this->assertResults(array(
-      array('user_id' => 1, 'id_count' => 1),
-      array('user_id' => 2, 'id_count' => 3),
-      array('user_id' => 3, 'id_count' => 2),
-    ));
+    $this->assertResults([
+      ['user_id' => 1, 'id_count' => 1],
+      ['user_id' => 2, 'id_count' => 3],
+      ['user_id' => 3, 'id_count' => 2],
+    ]);
 
     // Apply aggregation and a condition which matches.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -162,14 +162,14 @@ public function testAggregation() {
       ->groupBy('id')
       ->conditionAggregate('id', 'COUNT', 8)
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
 
     // Don't call aggregate to test the implicit aggregate call.
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->groupBy('id')
       ->conditionAggregate('id', 'COUNT', 8)
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
 
     // Apply aggregation and a condition which matches.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -177,7 +177,7 @@ public function testAggregation() {
       ->groupBy('id')
       ->conditionAggregate('id', 'COUNT', 6)
       ->execute();
-    $this->assertResults(array(array('id_count' => 6)));
+    $this->assertResults([['id_count' => 6]]);
 
     // Apply aggregation, a groupby and a condition which matches partially via
     // the operator '='.
@@ -186,7 +186,7 @@ public function testAggregation() {
       ->conditionAggregate('id', 'count', 2)
       ->groupBy('user_id')
       ->execute();
-    $this->assertResults(array(array('id_count' => 2, 'user_id' => 3)));
+    $this->assertResults([['id_count' => 2, 'user_id' => 3]]);
 
     // Apply aggregation, a groupby and a condition which matches partially via
     // the operator '>'.
@@ -195,10 +195,10 @@ public function testAggregation() {
       ->conditionAggregate('id', 'COUNT', 1, '>')
       ->groupBy('user_id')
       ->execute();
-    $this->assertResults(array(
-      array('id_count' => 2, 'user_id' => 3),
-      array('id_count' => 3, 'user_id' => 2),
-    ));
+    $this->assertResults([
+      ['id_count' => 2, 'user_id' => 3],
+      ['id_count' => 3, 'user_id' => 2],
+    ]);
 
     // Apply aggregation and a sort. This might not be useful, but have a proper
     // test coverage.
@@ -206,13 +206,13 @@ public function testAggregation() {
       ->aggregate('id', 'COUNT')
       ->sortAggregate('id', 'COUNT')
       ->execute();
-    $this->assertSortedResults(array(array('id_count' => 6)));
+    $this->assertSortedResults([['id_count' => 6]]);
 
     // Don't call aggregate to test the implicit aggregate call.
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->sortAggregate('id', 'COUNT')
       ->execute();
-    $this->assertSortedResults(array(array('id_count' => 6)));
+    $this->assertSortedResults([['id_count' => 6]]);
 
     // Apply aggregation, groupby and a sort descending.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -220,11 +220,11 @@ public function testAggregation() {
       ->groupBy('user_id')
       ->sortAggregate('id', 'COUNT', 'DESC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('user_id' => 2, 'id_count' => 3),
-      array('user_id' => 3, 'id_count' => 2),
-      array('user_id' => 1, 'id_count' => 1),
-    ));
+    $this->assertSortedResults([
+      ['user_id' => 2, 'id_count' => 3],
+      ['user_id' => 3, 'id_count' => 2],
+      ['user_id' => 1, 'id_count' => 1],
+    ]);
 
     // Apply aggregation, groupby and a sort ascending.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -232,11 +232,11 @@ public function testAggregation() {
       ->groupBy('user_id')
       ->sortAggregate('id', 'COUNT', 'ASC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('user_id' => 1, 'id_count' => 1),
-      array('user_id' => 3, 'id_count' => 2),
-      array('user_id' => 2, 'id_count' => 3),
-    ));
+    $this->assertSortedResults([
+      ['user_id' => 1, 'id_count' => 1],
+      ['user_id' => 3, 'id_count' => 2],
+      ['user_id' => 2, 'id_count' => 3],
+    ]);
 
     // Apply aggregation, groupby, an aggregation condition and a sort with the
     // operator '='.
@@ -246,7 +246,7 @@ public function testAggregation() {
       ->sortAggregate('id', 'COUNT')
       ->conditionAggregate('id', 'COUNT', 2)
       ->execute();
-    $this->assertSortedResults(array(array('id_count' => 2, 'user_id' => 3)));
+    $this->assertSortedResults([['id_count' => 2, 'user_id' => 3]]);
 
     // Apply aggregation, groupby, an aggregation condition and a sort with the
     // operator '<' and order ASC.
@@ -256,10 +256,10 @@ public function testAggregation() {
       ->sortAggregate('id', 'COUNT', 'ASC')
       ->conditionAggregate('id', 'COUNT', 3, '<')
       ->execute();
-    $this->assertSortedResults(array(
-      array('id_count' => 1, 'user_id' => 1),
-      array('id_count' => 2, 'user_id' => 3),
-    ));
+    $this->assertSortedResults([
+      ['id_count' => 1, 'user_id' => 1],
+      ['id_count' => 2, 'user_id' => 3],
+    ]);
 
     // Apply aggregation, groupby, an aggregation condition and a sort with the
     // operator '<' and order DESC.
@@ -269,10 +269,10 @@ public function testAggregation() {
       ->sortAggregate('id', 'COUNT', 'DESC')
       ->conditionAggregate('id', 'COUNT', 3, '<')
       ->execute();
-    $this->assertSortedResults(array(
-      array('id_count' => 2, 'user_id' => 3),
-      array('id_count' => 1, 'user_id' => 1),
-    ));
+    $this->assertSortedResults([
+      ['id_count' => 2, 'user_id' => 3],
+      ['id_count' => 1, 'user_id' => 1],
+    ]);
 
     // Test aggregation/groupby support for fieldapi fields.
 
@@ -280,11 +280,11 @@ public function testAggregation() {
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->groupBy('field_test_1')
       ->execute();
-    $this->assertResults(array(
-      array('field_test_1' => 1),
-      array('field_test_1' => 2),
-      array('field_test_1' => 3),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1],
+      ['field_test_1' => 2],
+      ['field_test_1' => 3],
+    ]);
 
     // Group by a fieldapi field and aggregate a normal property.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -292,11 +292,11 @@ public function testAggregation() {
       ->groupBy('field_test_1')
       ->execute();
 
-    $this->assertResults(array(
-      array('field_test_1' => 1, 'user_id_count' => 2),
-      array('field_test_1' => 2, 'user_id_count' => 3),
-      array('field_test_1' => 3, 'user_id_count' => 1),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1, 'user_id_count' => 2],
+      ['field_test_1' => 2, 'user_id_count' => 3],
+      ['field_test_1' => 3, 'user_id_count' => 1],
+    ]);
 
     // Group by a normal property and aggregate a fieldapi field.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -304,21 +304,21 @@ public function testAggregation() {
       ->groupBy('user_id')
       ->execute();
 
-    $this->assertResults(array(
-      array('user_id' => 1, 'field_test_1_count' => 1),
-      array('user_id' => 2, 'field_test_1_count' => 3),
-      array('user_id' => 3, 'field_test_1_count' => 2),
-    ));
+    $this->assertResults([
+      ['user_id' => 1, 'field_test_1_count' => 1],
+      ['user_id' => 2, 'field_test_1_count' => 3],
+      ['user_id' => 3, 'field_test_1_count' => 2],
+    ]);
 
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->aggregate('field_test_1', 'SUM')
       ->groupBy('user_id')
       ->execute();
-    $this->assertResults(array(
-      array('user_id' => 1, 'field_test_1_sum' => 1),
-      array('user_id' => 2, 'field_test_1_sum' => 5),
-      array('user_id' => 3, 'field_test_1_sum' => 5),
-    ));
+    $this->assertResults([
+      ['user_id' => 1, 'field_test_1_sum' => 1],
+      ['user_id' => 2, 'field_test_1_sum' => 5],
+      ['user_id' => 3, 'field_test_1_sum' => 5],
+    ]);
 
     // Aggregate by two different fieldapi fields.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -326,11 +326,11 @@ public function testAggregation() {
       ->aggregate('field_test_2', 'SUM')
       ->groupBy('user_id')
       ->execute();
-    $this->assertResults(array(
-      array('user_id' => 1, 'field_test_1_sum' => 1, 'field_test_2_sum' => 2),
-      array('user_id' => 2, 'field_test_1_sum' => 5, 'field_test_2_sum' => 16),
-      array('user_id' => 3, 'field_test_1_sum' => 5, 'field_test_2_sum' => 10),
-    ));
+    $this->assertResults([
+      ['user_id' => 1, 'field_test_1_sum' => 1, 'field_test_2_sum' => 2],
+      ['user_id' => 2, 'field_test_1_sum' => 5, 'field_test_2_sum' => 16],
+      ['user_id' => 3, 'field_test_1_sum' => 5, 'field_test_2_sum' => 10],
+    ]);
 
     // This time aggregate the same field twice.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -338,22 +338,22 @@ public function testAggregation() {
       ->aggregate('field_test_1', 'COUNT')
       ->groupBy('user_id')
       ->execute();
-    $this->assertResults(array(
-      array('user_id' => 1, 'field_test_1_sum' => 1, 'field_test_1_count' => 1),
-      array('user_id' => 2, 'field_test_1_sum' => 5, 'field_test_1_count' => 3),
-      array('user_id' => 3, 'field_test_1_sum' => 5, 'field_test_1_count' => 2),
-    ));
+    $this->assertResults([
+      ['user_id' => 1, 'field_test_1_sum' => 1, 'field_test_1_count' => 1],
+      ['user_id' => 2, 'field_test_1_sum' => 5, 'field_test_1_count' => 3],
+      ['user_id' => 3, 'field_test_1_sum' => 5, 'field_test_1_count' => 2],
+    ]);
 
     // Group by and aggregate by a fieldapi field.
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->groupBy('field_test_1')
       ->aggregate('field_test_2', 'COUNT')
       ->execute();
-    $this->assertResults(array(
-      array('field_test_1' => 1, 'field_test_2_count' => 2),
-      array('field_test_1' => 2, 'field_test_2_count' => 3),
-      array('field_test_1' => 3, 'field_test_2_count' => 1),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1, 'field_test_2_count' => 2],
+      ['field_test_1' => 2, 'field_test_2_count' => 3],
+      ['field_test_1' => 3, 'field_test_2_count' => 1],
+    ]);
 
     // Group by and aggregate by a fieldapi field and use multiple aggregate
     // functions.
@@ -362,11 +362,11 @@ public function testAggregation() {
       ->aggregate('field_test_2', 'COUNT')
       ->aggregate('field_test_2', 'SUM')
       ->execute();
-    $this->assertResults(array(
-      array('field_test_1' => 1, 'field_test_2_count' => 2, 'field_test_2_sum' => 9),
-      array('field_test_1' => 2, 'field_test_2_count' => 3, 'field_test_2_sum' => 11),
-      array('field_test_1' => 3, 'field_test_2_count' => 1, 'field_test_2_sum' => 8),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1, 'field_test_2_count' => 2, 'field_test_2_sum' => 9],
+      ['field_test_1' => 2, 'field_test_2_count' => 3, 'field_test_2_sum' => 11],
+      ['field_test_1' => 3, 'field_test_2_count' => 1, 'field_test_2_sum' => 8],
+    ]);
 
     // Apply an aggregate condition for a fieldapi field and group by a simple
     // property.
@@ -374,20 +374,20 @@ public function testAggregation() {
       ->conditionAggregate('field_test_1', 'COUNT', 3)
       ->groupBy('user_id')
       ->execute();
-    $this->assertResults(array(
-      array('user_id' => 2, 'field_test_1_count' => 3),
-      array('user_id' => 3, 'field_test_1_count' => 2),
-    ));
+    $this->assertResults([
+      ['user_id' => 2, 'field_test_1_count' => 3],
+      ['user_id' => 3, 'field_test_1_count' => 2],
+    ]);
 
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->aggregate('field_test_1', 'SUM')
       ->conditionAggregate('field_test_1', 'COUNT', 2, '>')
       ->groupBy('user_id')
       ->execute();
-    $this->assertResults(array(
-      array('user_id' => 2, 'field_test_1_sum' => 5, 'field_test_1_count' => 3),
-      array('user_id' => 3, 'field_test_1_sum' => 5, 'field_test_1_count' => 2),
-    ));
+    $this->assertResults([
+      ['user_id' => 2, 'field_test_1_sum' => 5, 'field_test_1_count' => 3],
+      ['user_id' => 3, 'field_test_1_sum' => 5, 'field_test_1_count' => 2],
+    ]);
 
     // Apply an aggregate condition for a simple property and a group by a
     // fieldapi field.
@@ -395,35 +395,35 @@ public function testAggregation() {
       ->conditionAggregate('user_id', 'COUNT', 2)
       ->groupBy('field_test_1')
       ->execute();
-    $this->assertResults(array(
-      array('field_test_1' => 1, 'user_id_count' => 2),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1, 'user_id_count' => 2],
+    ]);
 
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->conditionAggregate('user_id', 'COUNT', 2, '>')
       ->groupBy('field_test_1')
       ->execute();
-    $this->assertResults(array(
-      array('field_test_1' => 1, 'user_id_count' => 2),
-      array('field_test_1' => 2, 'user_id_count' => 3),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1, 'user_id_count' => 2],
+      ['field_test_1' => 2, 'user_id_count' => 3],
+    ]);
 
     // Apply an aggregate condition and a group by fieldapi fields.
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->groupBy('field_test_1')
       ->conditionAggregate('field_test_2', 'COUNT', 2)
       ->execute();
-    $this->assertResults(array(
-      array('field_test_1' => 1, 'field_test_2_count' => 2),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1, 'field_test_2_count' => 2],
+    ]);
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->groupBy('field_test_1')
       ->conditionAggregate('field_test_2', 'COUNT', 2, '>')
       ->execute();
-    $this->assertResults(array(
-      array('field_test_1' => 1, 'field_test_2_count' => 2),
-      array('field_test_1' => 2, 'field_test_2_count' => 3),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1, 'field_test_2_count' => 2],
+      ['field_test_1' => 2, 'field_test_2_count' => 3],
+    ]);
 
     // Apply an aggregate condition and a group by fieldapi fields with multiple
     // conditions via AND.
@@ -432,7 +432,7 @@ public function testAggregation() {
       ->conditionAggregate('field_test_2', 'COUNT', 2)
       ->conditionAggregate('field_test_2', 'SUM', 8)
       ->execute();
-    $this->assertResults(array());
+    $this->assertResults([]);
 
     // Apply an aggregate condition and a group by fieldapi fields with multiple
     // conditions via OR.
@@ -441,10 +441,10 @@ public function testAggregation() {
       ->conditionAggregate('field_test_2', 'COUNT', 2)
       ->conditionAggregate('field_test_2', 'SUM', 8)
       ->execute();
-    $this->assertResults(array(
-      array('field_test_1' => 1, 'field_test_2_count' => 2, 'field_test_2_sum' => 9),
-      array('field_test_1' => 3, 'field_test_2_count' => 1, 'field_test_2_sum' => 8),
-    ));
+    $this->assertResults([
+      ['field_test_1' => 1, 'field_test_2_count' => 2, 'field_test_2_sum' => 9],
+      ['field_test_1' => 3, 'field_test_2_count' => 1, 'field_test_2_sum' => 8],
+    ]);
 
     // Group by a normal property and aggregate a fieldapi field and sort by the
     // groupby field.
@@ -453,32 +453,32 @@ public function testAggregation() {
       ->groupBy('user_id')
       ->sort('user_id', 'DESC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('user_id' => 3, 'field_test_1_count' => 2),
-      array('user_id' => 2, 'field_test_1_count' => 3),
-      array('user_id' => 1, 'field_test_1_count' => 1),
-    ));
+    $this->assertSortedResults([
+      ['user_id' => 3, 'field_test_1_count' => 2],
+      ['user_id' => 2, 'field_test_1_count' => 3],
+      ['user_id' => 1, 'field_test_1_count' => 1],
+    ]);
 
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->aggregate('field_test_1', 'COUNT')
       ->groupBy('user_id')
       ->sort('user_id', 'ASC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('user_id' => 1, 'field_test_1_count' => 1),
-      array('user_id' => 2, 'field_test_1_count' => 3),
-      array('user_id' => 3, 'field_test_1_count' => 2),
-    ));
+    $this->assertSortedResults([
+      ['user_id' => 1, 'field_test_1_count' => 1],
+      ['user_id' => 2, 'field_test_1_count' => 3],
+      ['user_id' => 3, 'field_test_1_count' => 2],
+    ]);
 
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->conditionAggregate('field_test_1', 'COUNT', 2, '>')
       ->groupBy('user_id')
       ->sort('user_id', 'ASC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('user_id' => 2, 'field_test_1_count' => 3),
-      array('user_id' => 3, 'field_test_1_count' => 2),
-    ));
+    $this->assertSortedResults([
+      ['user_id' => 2, 'field_test_1_count' => 3],
+      ['user_id' => 3, 'field_test_1_count' => 2],
+    ]);
 
     // Group by a normal property, aggregate a fieldapi field, and sort by the
     // aggregated field.
@@ -486,21 +486,21 @@ public function testAggregation() {
       ->sortAggregate('field_test_1', 'COUNT', 'DESC')
       ->groupBy('user_id')
       ->execute();
-    $this->assertSortedResults(array(
-      array('user_id' => 2, 'field_test_1_count' => 3),
-      array('user_id' => 3, 'field_test_1_count' => 2),
-      array('user_id' => 1, 'field_test_1_count' => 1),
-    ));
+    $this->assertSortedResults([
+      ['user_id' => 2, 'field_test_1_count' => 3],
+      ['user_id' => 3, 'field_test_1_count' => 2],
+      ['user_id' => 1, 'field_test_1_count' => 1],
+    ]);
 
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->sortAggregate('field_test_1', 'COUNT', 'ASC')
       ->groupBy('user_id')
       ->execute();
-    $this->assertSortedResults(array(
-      array('user_id' => 1, 'field_test_1_count' => 1),
-      array('user_id' => 3, 'field_test_1_count' => 2),
-      array('user_id' => 2, 'field_test_1_count' => 3),
-    ));
+    $this->assertSortedResults([
+      ['user_id' => 1, 'field_test_1_count' => 1],
+      ['user_id' => 3, 'field_test_1_count' => 2],
+      ['user_id' => 2, 'field_test_1_count' => 3],
+    ]);
 
     // Group by and aggregate by fieldapi field, and sort by the groupby field.
     $this->queryResult = $this->factory->getAggregate('entity_test')
@@ -508,22 +508,22 @@ public function testAggregation() {
       ->aggregate('field_test_2', 'COUNT')
       ->sort('field_test_1', 'ASC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('field_test_1' => 1, 'field_test_2_count' => 2),
-      array('field_test_1' => 2, 'field_test_2_count' => 3),
-      array('field_test_1' => 3, 'field_test_2_count' => 1),
-    ));
+    $this->assertSortedResults([
+      ['field_test_1' => 1, 'field_test_2_count' => 2],
+      ['field_test_1' => 2, 'field_test_2_count' => 3],
+      ['field_test_1' => 3, 'field_test_2_count' => 1],
+    ]);
 
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->groupBy('field_test_1')
       ->aggregate('field_test_2', 'COUNT')
       ->sort('field_test_1', 'DESC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('field_test_1' => 3, 'field_test_2_count' => 1),
-      array('field_test_1' => 2, 'field_test_2_count' => 3),
-      array('field_test_1' => 1, 'field_test_2_count' => 2),
-    ));
+    $this->assertSortedResults([
+      ['field_test_1' => 3, 'field_test_2_count' => 1],
+      ['field_test_1' => 2, 'field_test_2_count' => 3],
+      ['field_test_1' => 1, 'field_test_2_count' => 2],
+    ]);
 
     // Groupby and aggregate by fieldapi field, and sort by the aggregated
     // field.
@@ -531,21 +531,21 @@ public function testAggregation() {
       ->groupBy('field_test_1')
       ->sortAggregate('field_test_2', 'COUNT', 'DESC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('field_test_1' => 2, 'field_test_2_count' => 3),
-      array('field_test_1' => 1, 'field_test_2_count' => 2),
-      array('field_test_1' => 3, 'field_test_2_count' => 1),
-    ));
+    $this->assertSortedResults([
+      ['field_test_1' => 2, 'field_test_2_count' => 3],
+      ['field_test_1' => 1, 'field_test_2_count' => 2],
+      ['field_test_1' => 3, 'field_test_2_count' => 1],
+    ]);
 
     $this->queryResult = $this->factory->getAggregate('entity_test')
       ->groupBy('field_test_1')
       ->sortAggregate('field_test_2', 'COUNT', 'ASC')
       ->execute();
-    $this->assertSortedResults(array(
-      array('field_test_1' => 3, 'field_test_2_count' => 1),
-      array('field_test_1' => 1, 'field_test_2_count' => 2),
-      array('field_test_1' => 2, 'field_test_2_count' => 3),
-    ));
+    $this->assertSortedResults([
+      ['field_test_1' => 3, 'field_test_2_count' => 1],
+      ['field_test_1' => 1, 'field_test_2_count' => 2],
+      ['field_test_1' => 2, 'field_test_2_count' => 3],
+    ]);
 
   }
 
@@ -559,7 +559,7 @@ protected function assertResults($expected, $sorted = FALSE) {
     $found = TRUE;
     $expected_keys = array_keys($expected);
     foreach ($this->queryResult as $key => $row) {
-      $keys = $sorted ? array($key) : $expected_keys;
+      $keys = $sorted ? [$key] : $expected_keys;
       foreach ($keys as $key) {
         $expected_row = $expected[$key];
         if (!array_diff_assoc($row, $expected_row) && !array_diff_assoc($expected_row, $row)) {
@@ -569,7 +569,7 @@ protected function assertResults($expected, $sorted = FALSE) {
       $found = FALSE;
       break;
     }
-    return $this->assertTrue($found, strtr('!expected expected, !found found', array('!expected' => print_r($expected, TRUE), '!found' => print_r($this->queryResult, TRUE))));
+    return $this->assertTrue($found, strtr('!expected expected, !found found', ['!expected' => print_r($expected, TRUE), '!found' => print_r($this->queryResult, TRUE)]));
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryRelationshipTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryRelationshipTest.php
index 60dc13c67b59298676d2fa1a729160a77943b4f9..0bb5b16c34a62dd513da72e854b0814cb9cd379a 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryRelationshipTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryRelationshipTest.php
@@ -23,7 +23,7 @@ class EntityQueryRelationshipTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('taxonomy');
+  public static $modules = ['taxonomy'];
 
   /**
    * @var \Drupal\Core\Entity\Query\QueryFactory
@@ -80,12 +80,12 @@ protected function setUp() {
     // Second, create the field.
     entity_test_create_bundle('test_bundle');
     $this->fieldName = strtolower($this->randomMachineName());
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $vocabulary->id() => $vocabulary->id(),
-       ),
+       ],
       'auto_create' => TRUE,
-    );
+    ];
     $this->createEntityReferenceField('entity_test', 'test_bundle', $this->fieldName, NULL, 'taxonomy_term', 'default', $handler_settings);
 
     // Create two terms and also two accounts.
@@ -102,7 +102,7 @@ protected function setUp() {
     // 0th account and 0th term, the 1st and 2nd entity will point to the
     // 1st account and 1st term.
     for ($i = 0; $i <= 2; $i++) {
-      $entity = EntityTest::create(array('type' => 'test_bundle'));
+      $entity = EntityTest::create(['type' => 'test_bundle']);
       $entity->name->value = $this->randomMachineName();
       $index = $i ? 1 : 0;
       $entity->user_id->target_id = $this->accounts[$index]->id();
@@ -122,18 +122,18 @@ public function testQuery() {
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("user_id.entity.name", $this->accounts[0]->getUsername())
       ->execute();
-    $this->assertResults(array(0));
+    $this->assertResults([0]);
     // This returns the 1st and 2nd entity as those point to the 1st account.
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("user_id.entity.name", $this->accounts[0]->getUsername(), '<>')
       ->execute();
-    $this->assertResults(array(1, 2));
+    $this->assertResults([1, 2]);
     // This returns all three entities because all of them point to an
     // account.
     $this->queryResults = $this->factory->get('entity_test')
       ->exists("user_id.entity.name")
       ->execute();
-    $this->assertResults(array(0, 1, 2));
+    $this->assertResults([0, 1, 2]);
     // This returns no entities because all of them point to an account.
     $this->queryResults = $this->factory->get('entity_test')
       ->notExists("user_id.entity.name")
@@ -144,35 +144,35 @@ public function testQuery() {
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("$this->fieldName.entity.name", $this->terms[0]->name->value)
       ->execute();
-    $this->assertResults(array(0));
+    $this->assertResults([0]);
     // This returns the 0th entity as that's only one pointing to the 0th
     // term (test with specifying the column name).
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("$this->fieldName.target_id.entity.name", $this->terms[0]->name->value)
       ->execute();
-    $this->assertResults(array(0));
+    $this->assertResults([0]);
     // This returns the 1st and 2nd entity as those point to the 1st term.
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("$this->fieldName.entity.name", $this->terms[0]->name->value, '<>')
       ->execute();
-    $this->assertResults(array(1, 2));
+    $this->assertResults([1, 2]);
     // This returns the 0th entity as that's only one pointing to the 0th
     // account.
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("user_id.entity:user.name", $this->accounts[0]->getUsername())
       ->execute();
-    $this->assertResults(array(0));
+    $this->assertResults([0]);
     // This returns the 1st and 2nd entity as those point to the 1st account.
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("user_id.entity:user.name", $this->accounts[0]->getUsername(), '<>')
       ->execute();
-    $this->assertResults(array(1, 2));
+    $this->assertResults([1, 2]);
     // This returns all three entities because all of them point to an
     // account.
     $this->queryResults = $this->factory->get('entity_test')
       ->exists("user_id.entity:user.name")
       ->execute();
-    $this->assertResults(array(0, 1, 2));
+    $this->assertResults([0, 1, 2]);
     // This returns no entities because all of them point to an account.
     $this->queryResults = $this->factory->get('entity_test')
       ->notExists("user_id.entity:user.name")
@@ -183,18 +183,18 @@ public function testQuery() {
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("$this->fieldName.entity:taxonomy_term.name", $this->terms[0]->name->value)
       ->execute();
-    $this->assertResults(array(0));
+    $this->assertResults([0]);
     // This returns the 0th entity as that's only one pointing to the 0th
     // term (test with specifying the column name).
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("$this->fieldName.target_id.entity:taxonomy_term.name", $this->terms[0]->name->value)
       ->execute();
-    $this->assertResults(array(0));
+    $this->assertResults([0]);
     // This returns the 1st and 2nd entity as those point to the 1st term.
     $this->queryResults = $this->factory->get('entity_test')
       ->condition("$this->fieldName.entity:taxonomy_term.name", $this->terms[0]->name->value, '<>')
       ->execute();
-    $this->assertResults(array(1, 2));
+    $this->assertResults([1, 2]);
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryTest.php
index 8c79c5c634259953fe9e97d0c58315f4f5e8aabd..1ad2f31bb8efa8f37cb08fae49a52473eaa9b3d3 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityQueryTest.php
@@ -24,7 +24,7 @@ class EntityQueryTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field_test', 'language');
+  public static $modules = ['field_test', 'language'];
 
   /**
    * @var array
@@ -62,21 +62,21 @@ protected function setUp() {
 
     $this->installEntitySchema('entity_test_mulrev');
 
-    $this->installConfig(array('language'));
+    $this->installConfig(['language']);
 
     $figures = Unicode::strtolower($this->randomMachineName());
     $greetings = Unicode::strtolower($this->randomMachineName());
-    foreach (array($figures => 'shape', $greetings => 'text') as $field_name => $field_type) {
-      $field_storage = FieldStorageConfig::create(array(
+    foreach ([$figures => 'shape', $greetings => 'text'] as $field_name => $field_type) {
+      $field_storage = FieldStorageConfig::create([
         'field_name' => $field_name,
         'entity_type' => 'entity_test_mulrev',
         'type' => $field_type,
         'cardinality' => 2,
-      ));
+      ]);
       $field_storage->save();
       $field_storages[] = $field_storage;
     }
-    $bundles = array();
+    $bundles = [];
     for ($i = 0; $i < 2; $i++) {
       // For the sake of tablesort, make sure the second bundle is higher than
       // the first one. Beware: MySQL is not case sensitive.
@@ -93,24 +93,24 @@ protected function setUp() {
       $bundles[] = $bundle;
     }
     // Each unit is a list of field name, langcode and a column-value array.
-    $units[] = array($figures, 'en', array(
+    $units[] = [$figures, 'en', [
       'color' => 'red',
       'shape' => 'triangle',
-    ));
-    $units[] = array($figures, 'en', array(
+    ]];
+    $units[] = [$figures, 'en', [
       'color' => 'blue',
       'shape' => 'circle',
-    ));
+    ]];
     // To make it easier to test sorting, the greetings get formats according
     // to their langcode.
-    $units[] = array($greetings, 'tr', array(
+    $units[] = [$greetings, 'tr', [
       'value' => 'merhaba',
       'format' => 'format-tr'
-    ));
-    $units[] = array($greetings, 'pl', array(
+    ]];
+    $units[] = [$greetings, 'pl', [
       'value' => 'siema',
       'format' => 'format-pl'
-    ));
+    ]];
     // Make these languages available to the greetings field.
     ConfigurableLanguage::createFromLangcode('tr')->save();
     ConfigurableLanguage::createFromLangcode('pl')->save();
@@ -119,13 +119,13 @@ protected function setUp() {
     // decimal 13 is binary 1101 so unit 3,2 and 0 will be added to the
     // entity.
     for ($i = 1; $i <= 15; $i++) {
-      $entity = EntityTestMulRev::create(array(
+      $entity = EntityTestMulRev::create([
         'type' => $bundles[$i & 1],
         'name' => $this->randomMachineName(),
         'langcode' => 'en',
-      ));
+      ]);
       // Make sure the name is set for every language that we might create.
-      foreach (array('tr', 'pl') as $langcode) {
+      foreach (['tr', 'pl'] as $langcode) {
         $entity->addTranslation($langcode)->name = $this->randomMachineName();
       }
       foreach (array_reverse(str_split(decbin($i))) as $key => $bit) {
@@ -216,8 +216,8 @@ function testEntityQuery() {
 
     // Do the same test but with IN operator.
     $query = $this->factory->get('entity_test_mulrev');
-    $group_blue = $query->andConditionGroup()->condition("$figures.color", array('blue'), 'IN');
-    $group_red = $query->andConditionGroup()->condition("$figures.color", array('red'), 'IN');
+    $group_blue = $query->andConditionGroup()->condition("$figures.color", ['blue'], 'IN');
+    $group_red = $query->andConditionGroup()->condition("$figures.color", ['red'], 'IN');
     $this->queryResults = $query
       ->condition($group_blue)
       ->condition($group_red)
@@ -228,7 +228,7 @@ function testEntityQuery() {
 
     // An entity might have either red or blue figure.
     $this->queryResults = $this->factory->get('entity_test_mulrev')
-      ->condition("$figures.color", array('blue', 'red'), 'IN')
+      ->condition("$figures.color", ['blue', 'red'], 'IN')
       ->sort('id')
       ->execute();
     // Bit 0 or 1 is on.
@@ -267,7 +267,7 @@ function testEntityQuery() {
       ->allRevisions()
       ->sort('revision_id')
       ->execute();
-    $this->assertRevisionResult(array($first_entity->id()), array($first_entity->id()));
+    $this->assertRevisionResult([$first_entity->id()], [$first_entity->id()]);
     // When querying current revisions, this string is no longer found.
     $this->queryResults = $this->factory->get('entity_test_mulrev')
       ->condition("$greetings.value", 'merhaba')
@@ -279,14 +279,14 @@ function testEntityQuery() {
       ->sort('revision_id')
       ->execute();
     // The query only matches the original revisions.
-    $this->assertRevisionResult(array(4, 5, 6, 7, 12, 13, 14, 15), array(4, 5, 6, 7, 12, 13, 14, 15));
+    $this->assertRevisionResult([4, 5, 6, 7, 12, 13, 14, 15], [4, 5, 6, 7, 12, 13, 14, 15]);
     $results = $this->factory->get('entity_test_mulrev')
       ->condition("$greetings.value", 'siema', 'CONTAINS')
       ->sort('id')
       ->execute();
     // This matches both the original and new current revisions, multiple
     // revisions are returned for some entities.
-    $assert = array(16 => '4', 17 => '5', 18 => '6', 19 => '7', 8 => '8', 9 => '9', 10 => '10', 11 => '11', 20 => '12', 21 => '13', 22 => '14', 23 => '15');
+    $assert = [16 => '4', 17 => '5', 18 => '6', 19 => '7', 8 => '8', 9 => '9', 10 => '10', 11 => '11', 20 => '12', 21 => '13', 22 => '14', 23 => '15'];
     $this->assertIdentical($results, $assert);
     $results = $this->factory->get('entity_test_mulrev')
       ->condition("$greetings.value", 'siema', 'STARTS_WITH')
@@ -309,7 +309,7 @@ function testEntityQuery() {
       ->sort('revision_id')
       ->execute();
     // Now we get everything.
-    $assert = array(4 => '4', 5 => '5', 6 => '6', 7 => '7', 8 => '8', 9 => '9', 10 => '10', 11 => '11', 12 => '12', 20 => '12', 13 => '13', 21 => '13', 14 => '14', 22 => '14', 15 => '15', 23 => '15');
+    $assert = [4 => '4', 5 => '5', 6 => '6', 7 => '7', 8 => '8', 9 => '9', 10 => '10', 11 => '11', 12 => '12', 20 => '12', 13 => '13', 21 => '13', 14 => '14', 22 => '14', 15 => '15', 23 => '15'];
     $this->assertIdentical($results, $assert);
   }
 
@@ -376,9 +376,9 @@ function testSort() {
     // Test the pager by setting element #1 to page 2 with a page size of 4.
     // Results will be #8-12 from above.
     $request = Request::createFromGlobals();
-    $request->query->replace(array(
+    $request->query->replace([
       'page' => '0,2',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
     $this->queryResults = $this->factory->get('entity_test_mulrev')
       ->sort("$figures.color")
@@ -407,40 +407,40 @@ public function testTableSort() {
     // assert that all entities from one bundle are after the other as the
     // order dictates.
     $request = Request::createFromGlobals();
-    $request->query->replace(array(
+    $request->query->replace([
       'sort' => 'asc',
       'order' => 'Type',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
 
-    $header = array(
-      'id' => array('data' => 'Id', 'specifier' => 'id'),
-      'type' => array('data' => 'Type', 'specifier' => 'type'),
-    );
+    $header = [
+      'id' => ['data' => 'Id', 'specifier' => 'id'],
+      'type' => ['data' => 'Type', 'specifier' => 'type'],
+    ];
 
     $this->queryResults = array_values($this->factory->get('entity_test_mulrev')
       ->tableSort($header)
       ->execute());
     $this->assertBundleOrder('asc');
 
-    $request->query->add(array(
+    $request->query->add([
       'sort' => 'desc',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
 
-    $header = array(
-      'id' => array('data' => 'Id', 'specifier' => 'id'),
-      'type' => array('data' => 'Type', 'specifier' => 'type'),
-    );
+    $header = [
+      'id' => ['data' => 'Id', 'specifier' => 'id'],
+      'type' => ['data' => 'Type', 'specifier' => 'type'],
+    ];
     $this->queryResults = array_values($this->factory->get('entity_test_mulrev')
       ->tableSort($header)
       ->execute());
     $this->assertBundleOrder('desc');
 
     // Ordering on ID is definite, however.
-    $request->query->add(array(
+    $request->query->add([
       'order' => 'Id',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
     $this->queryResults = $this->factory->get('entity_test_mulrev')
       ->tableSort($header)
@@ -454,13 +454,13 @@ public function testTableSort() {
   public function testCount() {
     // Create a field with the same name in a different entity type.
     $field_name = $this->figures;
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'shape',
       'cardinality' => 2,
       'translatable' => TRUE,
-    ));
+    ]);
     $field_storage->save();
     $bundle = $this->randomMachineName();
     FieldConfig::create([
@@ -468,10 +468,10 @@ public function testCount() {
       'bundle' => $bundle,
     ])->save();
 
-    $entity = EntityTest::create(array(
+    $entity = EntityTest::create([
       'id' => 1,
       'type' => $bundle,
-    ));
+    ]);
     $entity->enforceIsNew();
     $entity->save();
 
@@ -545,8 +545,8 @@ public function testDelta() {
 
     // Test the delta range condition.
     $this->queryResults = $this->factory->get('entity_test_mulrev')
-      ->condition("$figures.%delta.color", array('blue', 'red'), 'IN')
-      ->condition("$figures.%delta", array(0, 1), 'IN')
+      ->condition("$figures.%delta.color", ['blue', 'red'], 'IN')
+      ->condition("$figures.%delta", [0, 1], 'IN')
       ->sort('id')
       ->execute();
     // Figure delta 0 or 1 can be blue or red, this matches a lot of entities.
@@ -563,12 +563,12 @@ public function testDelta() {
     // Numeric delta on single value base field should return results only if
     // the first item is being targeted.
     $this->queryResults = $this->factory->get('entity_test_mulrev')
-      ->condition("id.0.value", array(1, 3, 5), 'IN')
+      ->condition("id.0.value", [1, 3, 5], 'IN')
       ->sort('id')
       ->execute();
     $this->assertResult(1, 3, 5);
     $this->queryResults = $this->factory->get('entity_test_mulrev')
-      ->condition("id.1.value", array(1, 3, 5), 'IN')
+      ->condition("id.1.value", [1, 3, 5], 'IN')
       ->sort('id')
       ->execute();
     $this->assertResult();
@@ -576,18 +576,18 @@ public function testDelta() {
     // Delta range condition on single value base field should return results
     // only if just the field value is targeted.
     $this->queryResults = $this->factory->get('entity_test_mulrev')
-      ->condition("id.%delta.value", array(1, 3, 5), 'IN')
+      ->condition("id.%delta.value", [1, 3, 5], 'IN')
       ->sort('id')
       ->execute();
     $this->assertResult(1, 3, 5);
     $this->queryResults = $this->factory->get('entity_test_mulrev')
-      ->condition("id.%delta.value", array(1, 3, 5), 'IN')
+      ->condition("id.%delta.value", [1, 3, 5], 'IN')
       ->condition("id.%delta", 0, '=')
       ->sort('id')
       ->execute();
     $this->assertResult(1, 3, 5);
     $this->queryResults = $this->factory->get('entity_test_mulrev')
-      ->condition("id.%delta.value", array(1, 3, 5), 'IN')
+      ->condition("id.%delta.value", [1, 3, 5], 'IN')
       ->condition("id.%delta", 1, '=')
       ->sort('id')
       ->execute();
@@ -596,7 +596,7 @@ public function testDelta() {
   }
 
   protected function assertResult() {
-    $assert = array();
+    $assert = [];
     $expected = func_get_args();
     if ($expected && is_array($expected[0])) {
       $expected = $expected[0];
@@ -608,7 +608,7 @@ protected function assertResult() {
   }
 
   protected function assertRevisionResult($keys, $expected) {
-    $assert = array();
+    $assert = [];
     foreach ($expected as $key => $binary) {
       $assert[$keys[$key]] = strval($binary);
     }
@@ -659,41 +659,41 @@ public function testMetaData() {
   public function testCaseSensitivity() {
     $bundle = $this->randomMachineName();
 
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_ci',
       'entity_type' => 'entity_test_mulrev',
       'type' => 'string',
       'cardinality' => 1,
       'translatable' => FALSE,
-      'settings' => array(
+      'settings' => [
         'case_sensitive' => FALSE,
-      )
-    ));
+      ]
+    ]);
     $field_storage->save();
 
-    FieldConfig::create(array(
+    FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => $bundle,
-    ))->save();
+    ])->save();
 
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_cs',
       'entity_type' => 'entity_test_mulrev',
       'type' => 'string',
       'cardinality' => 1,
       'translatable' => FALSE,
-      'settings' => array(
+      'settings' => [
         'case_sensitive' => TRUE,
-      ),
-    ));
+      ],
+    ]);
     $field_storage->save();
 
-    FieldConfig::create(array(
+    FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => $bundle,
-    ))->save();
+    ])->save();
 
-    $fixtures = array();
+    $fixtures = [];
 
     for ($i = 0; $i < 2; $i++) {
       // If the last 4 of the string are all numbers, then there is no
@@ -701,20 +701,20 @@ public function testCaseSensitivity() {
       // test will fail. Ensure that can not happen by appending a non-numeric
       // character. See https://www.drupal.org/node/2397297.
       $string = $this->randomMachineName(7) . 'a';
-      $fixtures[] = array(
+      $fixtures[] = [
         'original' => $string,
         'uppercase' => Unicode::strtoupper($string),
         'lowercase' => Unicode::strtolower($string),
-      );
+      ];
     }
 
-    EntityTestMulRev::create(array(
+    EntityTestMulRev::create([
       'type' => $bundle,
       'name' => $this->randomMachineName(),
       'langcode' => 'en',
       'field_ci' => $fixtures[0]['uppercase'] . $fixtures[1]['lowercase'],
       'field_cs' => $fixtures[0]['uppercase'] . $fixtures[1]['lowercase']
-    ))->save();
+    ])->save();
 
     // Check the case insensitive field, = operator.
     $result = \Drupal::entityQuery('entity_test_mulrev')->condition(
@@ -750,33 +750,33 @@ public function testCaseSensitivity() {
 
     // Check the case insensitive field, IN operator.
     $result = \Drupal::entityQuery('entity_test_mulrev')->condition(
-      'field_ci', array($fixtures[0]['lowercase'] . $fixtures[1]['lowercase']), 'IN'
+      'field_ci', [$fixtures[0]['lowercase'] . $fixtures[1]['lowercase']], 'IN'
     )->execute();
     $this->assertIdentical(count($result), 1, 'Case insensitive, lowercase');
 
     $result = \Drupal::entityQuery('entity_test_mulrev')->condition(
-      'field_ci', array($fixtures[0]['uppercase'] . $fixtures[1]['uppercase']), 'IN'
+      'field_ci', [$fixtures[0]['uppercase'] . $fixtures[1]['uppercase']], 'IN'
     )->execute();
     $this->assertIdentical(count($result), 1, 'Case insensitive, uppercase');
 
     $result = \Drupal::entityQuery('entity_test_mulrev')->condition(
-      'field_ci', array($fixtures[0]['uppercase'] . $fixtures[1]['lowercase']), 'IN'
+      'field_ci', [$fixtures[0]['uppercase'] . $fixtures[1]['lowercase']], 'IN'
     )->execute();
     $this->assertIdentical(count($result), 1, 'Case insensitive, mixed');
 
     // Check the case sensitive field, IN operator.
     $result = \Drupal::entityQuery('entity_test_mulrev')->condition(
-      'field_cs', array($fixtures[0]['lowercase'] . $fixtures[1]['lowercase']), 'IN'
+      'field_cs', [$fixtures[0]['lowercase'] . $fixtures[1]['lowercase']], 'IN'
     )->execute();
     $this->assertIdentical(count($result), 0, 'Case sensitive, lowercase');
 
     $result = \Drupal::entityQuery('entity_test_mulrev')->condition(
-      'field_cs', array($fixtures[0]['uppercase'] . $fixtures[1]['uppercase']), 'IN'
+      'field_cs', [$fixtures[0]['uppercase'] . $fixtures[1]['uppercase']], 'IN'
     )->execute();
     $this->assertIdentical(count($result), 0, 'Case sensitive, uppercase');
 
     $result = \Drupal::entityQuery('entity_test_mulrev')->condition(
-      'field_cs', array($fixtures[0]['uppercase'] . $fixtures[1]['lowercase']), 'IN'
+      'field_cs', [$fixtures[0]['uppercase'] . $fixtures[1]['lowercase']], 'IN'
     )->execute();
     $this->assertIdentical(count($result), 1, 'Case sensitive, mixed');
 
@@ -863,19 +863,19 @@ public function testBaseFieldMultipleColumns() {
     $term1 = Term::create([
       'name' => $this->randomMachineName(),
       'vid' => 'tags',
-      'description' => array(
+      'description' => [
         'value' => $this->randomString(),
         'format' => 'format1',
-      )]);
+      ]]);
     $term1->save();
 
     $term2 = Term::create([
       'name' => $this->randomMachineName(),
       'vid' => 'tags',
-      'description' => array(
+      'description' => [
         'value' => $this->randomString(),
         'format' => 'format2',
-      )]);
+      ]]);
     $term2->save();
 
     $ids = \Drupal::entityQuery('taxonomy_term')
@@ -936,7 +936,7 @@ public function testForwardRevisions() {
   public function testInjectionInCondition() {
     try {
       $this->queryResults = $this->factory->get('entity_test_mulrev')
-        ->condition('1 ; -- ', array(0, 1), 'IN')
+        ->condition('1 ; -- ', [0, 1], 'IN')
         ->sort('id')
         ->execute();
       $this->fail('SQL Injection attempt in Entity Query condition in operator should result in an exception.');
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityReferenceFieldTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityReferenceFieldTest.php
index cb82742faaf211d243a95c82eb66a88031994df8..e9b1857dc6135242ec95802d1203494907b86871 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityReferenceFieldTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityReferenceFieldTest.php
@@ -59,7 +59,7 @@ class EntityReferenceFieldTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_reference_test');
+  public static $modules = ['entity_reference_test'];
 
   /**
    * {@inheritdoc}
@@ -77,7 +77,7 @@ protected function setUp() {
       'Field test',
       $this->referencedEntityType,
       'default',
-      array('target_bundles' => array($this->bundle)),
+      ['target_bundles' => [$this->bundle]],
       FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED
     );
 
@@ -90,12 +90,12 @@ public function testEntityReferenceFieldValidation() {
     // Test a valid reference.
     $referenced_entity = $this->container->get('entity_type.manager')
       ->getStorage($this->referencedEntityType)
-      ->create(array('type' => $this->bundle));
+      ->create(['type' => $this->bundle]);
     $referenced_entity->save();
 
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('type' => $this->bundle));
+      ->create(['type' => $this->bundle]);
     $entity->{$this->fieldName}->target_id = $referenced_entity->id();
     $violations = $entity->{$this->fieldName}->validate();
     $this->assertEqual($violations->count(), 0, 'Validation passes.');
@@ -104,16 +104,16 @@ public function testEntityReferenceFieldValidation() {
     $entity->{$this->fieldName}->target_id = 9999;
     $violations = $entity->{$this->fieldName}->validate();
     $this->assertEqual($violations->count(), 1, 'Validation throws a violation.');
-    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%type: %id) does not exist.', array('%type' => $this->referencedEntityType, '%id' => 9999)));
+    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%type: %id) does not exist.', ['%type' => $this->referencedEntityType, '%id' => 9999]));
 
     // Test a non-referenceable bundle.
     entity_test_create_bundle('non_referenceable', NULL, $this->referencedEntityType);
-    $referenced_entity = entity_create($this->referencedEntityType, array('type' => 'non_referenceable'));
+    $referenced_entity = entity_create($this->referencedEntityType, ['type' => 'non_referenceable']);
     $referenced_entity->save();
     $entity->{$this->fieldName}->target_id = $referenced_entity->id();
     $violations = $entity->{$this->fieldName}->validate();
     $this->assertEqual($violations->count(), 1, 'Validation throws a violation.');
-    $this->assertEqual($violations[0]->getMessage(), t('This entity (%type: %id) cannot be referenced.', array('%type' => $this->referencedEntityType, '%id' => $referenced_entity->id())));
+    $this->assertEqual($violations[0]->getMessage(), t('This entity (%type: %id) cannot be referenced.', ['%type' => $this->referencedEntityType, '%id' => $referenced_entity->id()]));
   }
 
   /**
@@ -123,15 +123,15 @@ public function testReferencedEntitiesMultipleLoad() {
     // Create the parent entity.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('type' => $this->bundle));
+      ->create(['type' => $this->bundle]);
 
     // Create three target entities and attach them to parent field.
-    $target_entities = array();
-    $reference_field = array();
+    $target_entities = [];
+    $reference_field = [];
     for ($i = 0; $i < 3; $i++) {
       $target_entity = $this->container->get('entity_type.manager')
         ->getStorage($this->referencedEntityType)
-        ->create(array('type' => $this->bundle));
+        ->create(['type' => $this->bundle]);
       $target_entity->save();
       $target_entities[] = $target_entity;
       $reference_field[]['target_id'] = $target_entity->id();
@@ -154,7 +154,7 @@ public function testReferencedEntitiesMultipleLoad() {
     // "autocreate" feature.
     $target_entity_unsaved = $this->container->get('entity_type.manager')
       ->getStorage($this->referencedEntityType)
-      ->create(array('type' => $this->bundle, 'name' => $this->randomString()));
+      ->create(['type' => $this->bundle, 'name' => $this->randomString()]);
     $reference_field[6]['entity'] = $target_entity_unsaved;
     $target_entities[6] = $target_entity_unsaved;
 
@@ -201,13 +201,13 @@ public function testReferencedEntitiesStringId() {
       'Field test',
       'entity_test_string_id',
       'default',
-      array('target_bundles' => array($this->bundle)),
+      ['target_bundles' => [$this->bundle]],
       FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED
     );
     // Create the parent entity.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('type' => $this->bundle));
+      ->create(['type' => $this->bundle]);
 
     // Create the default target entity.
     $target_entity = EntityTestStringId::create([
@@ -217,7 +217,7 @@ public function testReferencedEntitiesStringId() {
     $target_entity->save();
 
     // Set the field value.
-    $entity->{$field_name}->setValue(array(array('target_id' => $target_entity->id())));
+    $entity->{$field_name}->setValue([['target_id' => $target_entity->id()]]);
 
     // Load the target entities using EntityReferenceField::referencedEntities().
     $entities = $entity->{$field_name}->referencedEntities();
@@ -233,7 +233,7 @@ public function testReferencedEntitiesStringId() {
     // Test that the default value works.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($this->entityType)
-      ->create(array('type' => $this->bundle));
+      ->create(['type' => $this->bundle]);
     $entities = $entity->{$field_name}->referencedEntities();
     $this->assertEqual($entities[0]->id(), $target_entity->id());
   }
@@ -244,7 +244,7 @@ public function testReferencedEntitiesStringId() {
   function testAutocreateApi() {
     $entity = $this->entityManager
       ->getStorage($this->entityType)
-      ->create(array('name' => $this->randomString()));
+      ->create(['name' => $this->randomString()]);
 
     // Test content entity autocreation.
     $this->assertUserAutocreate($entity, function(EntityInterface $entity, UserInterface $user) {
@@ -260,13 +260,13 @@ function testAutocreateApi() {
       $entity->user_id[0]->get('entity')->setValue($user);
     });
     $this->assertUserAutocreate($entity, function(EntityInterface $entity, UserInterface $user) {
-      $entity->user_id->setValue(array('entity' => $user, 'target_id' => NULL));
+      $entity->user_id->setValue(['entity' => $user, 'target_id' => NULL]);
     });
     try {
       $message = 'Setting both the entity and an invalid target_id property fails.';
       $this->assertUserAutocreate($entity, function(EntityInterface $entity, UserInterface $user) {
         $user->save();
-        $entity->user_id->setValue(array('entity' => $user, 'target_id' => $this->generateRandomEntityId()));
+        $entity->user_id->setValue(['entity' => $user, 'target_id' => $this->generateRandomEntityId()]);
       });
       $this->fail($message);
     }
@@ -294,13 +294,13 @@ function testAutocreateApi() {
       $entity->user_role[0]->get('entity')->setValue($role);
     });
     $this->assertUserRoleAutocreate($entity, function(EntityInterface $entity, RoleInterface $role) {
-      $entity->user_role->setValue(array('entity' => $role, 'target_id' => NULL));
+      $entity->user_role->setValue(['entity' => $role, 'target_id' => NULL]);
     });
     try {
       $message = 'Setting both the entity and an invalid target_id property fails.';
       $this->assertUserRoleAutocreate($entity, function(EntityInterface $entity, RoleInterface $role) {
         $role->save();
-        $entity->user_role->setValue(array('entity' => $role, 'target_id' => $this->generateRandomEntityId(TRUE)));
+        $entity->user_role->setValue(['entity' => $role, 'target_id' => $this->generateRandomEntityId(TRUE)]);
       });
       $this->fail($message);
     }
@@ -317,7 +317,7 @@ function testAutocreateApi() {
     // Test target entity saving after setting it as new.
     $storage = $this->entityManager->getStorage('user');
     $user_id = $this->generateRandomEntityId();
-    $user = $storage->create(array('uid' => $user_id, 'name' => $this->randomString()));
+    $user = $storage->create(['uid' => $user_id, 'name' => $this->randomString()]);
     $entity->user_id = $user;
     $user->save();
     $entity->save();
@@ -338,7 +338,7 @@ function testAutocreateApi() {
   protected function assertUserAutocreate(EntityInterface $entity, $setter_callback) {
     $storage = $this->entityManager->getStorage('user');
     $user_id = $this->generateRandomEntityId();
-    $user = $storage->create(array('uid' => $user_id, 'name' => $this->randomString()));
+    $user = $storage->create(['uid' => $user_id, 'name' => $this->randomString()]);
     $setter_callback($entity, $user);
     $entity->save();
     $storage->resetCache();
@@ -360,7 +360,7 @@ protected function assertUserAutocreate(EntityInterface $entity, $setter_callbac
   protected function assertUserRoleAutocreate(EntityInterface $entity, $setter_callback) {
     $storage = $this->entityManager->getStorage('user_role');
     $role_id = $this->generateRandomEntityId(TRUE);
-    $role = $storage->create(array('id' => $role_id, 'label' => $this->randomString()));
+    $role = $storage->create(['id' => $role_id, 'label' => $this->randomString()]);
     $setter_callback($entity, $role);
     $entity->save();
     $storage->resetCache();
@@ -378,11 +378,11 @@ public function testTargetEntityNoLoad() {
     $entity_type = clone $this->entityManager->getDefinition('entity_test_update');
     $entity_type->setHandlerClass('storage', '\Drupal\entity_test\EntityTestNoLoadStorage');
     $this->state->set('entity_test_update.entity_type', $entity_type);
-    $definitions = array(
+    $definitions = [
       'target_reference' => BaseFieldDefinition::create('entity_reference')
         ->setSetting('target_type', $entity_type->id())
         ->setSetting('handler', 'default')
-    );
+    ];
     $this->state->set('entity_test_update.additional_base_field_definitions', $definitions);
     $this->entityManager->clearCachedDefinitions();
     $this->installEntitySchema($entity_type->id());
@@ -390,7 +390,7 @@ public function testTargetEntityNoLoad() {
     // Create the target entity.
     $storage = $this->entityManager->getStorage($entity_type->id());
     $target_id = $this->generateRandomEntityId();
-    $target = $storage->create(array('id' => $target_id, 'name' => $this->randomString()));
+    $target = $storage->create(['id' => $target_id, 'name' => $this->randomString()]);
     $target->save();
     $this->assertEqual($target_id, $target->id(), 'The target entity has a random identifier.');
 
@@ -400,7 +400,7 @@ public function testTargetEntityNoLoad() {
     try {
       $entity = $this->entityManager
         ->getStorage($entity_type->id())
-        ->create(array('name' => $this->randomString()));
+        ->create(['name' => $this->randomString()]);
       $entity->target_reference = $target_id;
       $this->pass($message);
     }
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityReferenceSelection/EntityReferenceSelectionSortTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityReferenceSelection/EntityReferenceSelectionSortTest.php
index f51c8ea3dc7632095f67b4168bb980e6182c93b2..eb13d0e491267e529007379c5e7aa906ee984c41 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityReferenceSelection/EntityReferenceSelectionSortTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityReferenceSelection/EntityReferenceSelectionSortTest.php
@@ -21,19 +21,19 @@ class EntityReferenceSelectionSortTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('node');
+  public static $modules = ['node'];
 
   protected function setUp() {
     parent::setUp();
 
     // Create an Article node type.
-    $article = NodeType::create(array(
+    $article = NodeType::create([
       'type' => 'article',
-    ));
+    ]);
     $article->save();
 
     // Test as a non-admin.
-    $normal_user = $this->createUser(array(), array('access content'));
+    $normal_user = $this->createUser([], ['access content']);
     \Drupal::currentUser()->setAccount($normal_user);
   }
 
@@ -42,50 +42,50 @@ protected function setUp() {
    */
   public function testSort() {
     // Add text field to entity, to sort by.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_text',
       'entity_type' => 'node',
       'type' => 'text',
-      'entity_types' => array('node'),
-    ))->save();
+      'entity_types' => ['node'],
+    ])->save();
 
     FieldConfig::create([
       'label' => 'Text Field',
       'field_name' => 'field_text',
       'entity_type' => 'node',
       'bundle' => 'article',
-      'settings' => array(),
+      'settings' => [],
       'required' => FALSE,
     ])->save();
 
     // Build a set of test data.
-    $node_values = array(
-      'published1' => array(
+    $node_values = [
+      'published1' => [
         'type' => 'article',
         'status' => 1,
         'title' => 'Node published1 (<&>)',
         'uid' => 1,
-        'field_text' => array(
-          array(
+        'field_text' => [
+          [
             'value' => 1,
-          ),
-        ),
-      ),
-      'published2' => array(
+          ],
+        ],
+      ],
+      'published2' => [
         'type' => 'article',
         'status' => 1,
         'title' => 'Node published2 (<&>)',
         'uid' => 1,
-        'field_text' => array(
-          array(
+        'field_text' => [
+          [
             'value' => 2,
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
 
-    $nodes = array();
-    $node_labels = array();
+    $nodes = [];
+    $node_labels = [];
     foreach ($node_values as $key => $values) {
       $node = Node::create($values);
       $node->save();
@@ -93,40 +93,40 @@ public function testSort() {
       $node_labels[$key] = Html::escape($node->label());
     }
 
-    $selection_options = array(
+    $selection_options = [
       'target_type' => 'node',
       'handler' => 'default',
-      'handler_settings' => array(
+      'handler_settings' => [
         'target_bundles' => NULL,
         // Add sorting.
-        'sort' => array(
+        'sort' => [
           'field' => 'field_text.value',
           'direction' => 'DESC',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     $handler = $this->container->get('plugin.manager.entity_reference_selection')->getInstance($selection_options);
 
     // Not only assert the result, but make sure the keys are sorted as
     // expected.
     $result = $handler->getReferenceableEntities();
-    $expected_result = array(
+    $expected_result = [
       $nodes['published2']->id() => $node_labels['published2'],
       $nodes['published1']->id() => $node_labels['published1'],
-    );
+    ];
     $this->assertIdentical($result['article'], $expected_result, 'Query sorted by field returned expected values.');
 
     // Assert sort by base field.
-    $selection_options['handler_settings']['sort'] = array(
+    $selection_options['handler_settings']['sort'] = [
       'field' => 'nid',
       'direction' => 'ASC',
-    );
+    ];
     $handler = $this->container->get('plugin.manager.entity_reference_selection')->getInstance($selection_options);
     $result = $handler->getReferenceableEntities();
-    $expected_result = array(
+    $expected_result = [
       $nodes['published1']->id() => $node_labels['published1'],
       $nodes['published2']->id() => $node_labels['published2'],
-    );
+    ];
     $this->assertIdentical($result['article'], $expected_result, 'Query sorted by property returned expected values.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntitySchemaTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntitySchemaTest.php
index fdf72df4a3918cbd54e0492b5c705c1a7ecec15b..3e285ff69b2a22f14c1ed8ac06bcbbf8237f3fb0 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntitySchemaTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntitySchemaTest.php
@@ -23,7 +23,7 @@ class EntitySchemaTest extends EntityKernelTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('user', array('users_data'));
+    $this->installSchema('user', ['users_data']);
     $this->database = $this->container->get('database');
   }
 
@@ -80,33 +80,33 @@ public function testEntitySchemaUpdate() {
     $this->entityManager->onFieldStorageDefinitionCreate($storage_definitions['custom_base_field']);
     $this->entityManager->onFieldStorageDefinitionCreate($storage_definitions['custom_bundle_field']);
     $schema_handler = $this->database->schema();
-    $tables = array('entity_test', 'entity_test_revision', 'entity_test_field_data', 'entity_test_field_revision');
-    $dedicated_tables = array('entity_test__custom_bundle_field', 'entity_test_revision__custom_bundle_field');
+    $tables = ['entity_test', 'entity_test_revision', 'entity_test_field_data', 'entity_test_field_revision'];
+    $dedicated_tables = ['entity_test__custom_bundle_field', 'entity_test_revision__custom_bundle_field'];
 
     // Initially only the base table and the dedicated field data table should
     // exist.
     foreach ($tables as $index => $table) {
-      $this->assertEqual($schema_handler->tableExists($table), !$index, SafeMarkup::format('Entity schema correct for the @table table.', array('@table' => $table)));
+      $this->assertEqual($schema_handler->tableExists($table), !$index, SafeMarkup::format('Entity schema correct for the @table table.', ['@table' => $table]));
     }
-    $this->assertTrue($schema_handler->tableExists($dedicated_tables[0]), SafeMarkup::format('Field schema correct for the @table table.', array('@table' => $table)));
+    $this->assertTrue($schema_handler->tableExists($dedicated_tables[0]), SafeMarkup::format('Field schema correct for the @table table.', ['@table' => $table]));
 
     // Update the entity type definition and check that the entity schema now
     // supports translations and revisions.
     $this->updateEntityType(TRUE);
     foreach ($tables as $table) {
-      $this->assertTrue($schema_handler->tableExists($table), SafeMarkup::format('Entity schema correct for the @table table.', array('@table' => $table)));
+      $this->assertTrue($schema_handler->tableExists($table), SafeMarkup::format('Entity schema correct for the @table table.', ['@table' => $table]));
     }
     foreach ($dedicated_tables as $table) {
-      $this->assertTrue($schema_handler->tableExists($table), SafeMarkup::format('Field schema correct for the @table table.', array('@table' => $table)));
+      $this->assertTrue($schema_handler->tableExists($table), SafeMarkup::format('Field schema correct for the @table table.', ['@table' => $table]));
     }
 
     // Revert changes and check that the entity schema now does not support
     // neither translations nor revisions.
     $this->updateEntityType(FALSE);
     foreach ($tables as $index => $table) {
-      $this->assertEqual($schema_handler->tableExists($table), !$index, SafeMarkup::format('Entity schema correct for the @table table.', array('@table' => $table)));
+      $this->assertEqual($schema_handler->tableExists($table), !$index, SafeMarkup::format('Entity schema correct for the @table table.', ['@table' => $table]));
     }
-    $this->assertTrue($schema_handler->tableExists($dedicated_tables[0]), SafeMarkup::format('Field schema correct for the @table table.', array('@table' => $table)));
+    $this->assertTrue($schema_handler->tableExists($dedicated_tables[0]), SafeMarkup::format('Field schema correct for the @table table.', ['@table' => $table]));
   }
 
   /**
@@ -167,7 +167,7 @@ public function testCleanUpStorageDefinition() {
     $this->assertNotEqual($entity_type_id_count, 0, 'There are storage definitions provided by the entity_test module in the schema.');
 
     // Uninstall the entity_test module.
-    $this->container->get('module_installer')->uninstall(array('entity_test'));
+    $this->container->get('module_installer')->uninstall(['entity_test']);
 
     // Get a list of all the entities in the schema.
     $key_value_store = \Drupal::keyValue('entity.storage_schema.sql');
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityTranslationTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityTranslationTest.php
index ed6140da0e6ebc51e1fd7c1bb9bcae0b8cff342b..fad389914314290f80985bfb1edd36e4a843bb95 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityTranslationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityTranslationTest.php
@@ -37,28 +37,28 @@ protected function doTestEntityLanguageMethods($entity_type) {
     $langcode_key = $this->entityManager->getDefinition($entity_type)->getKey('langcode');
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'name' => 'test',
         'user_id' => $this->container->get('current_user')->id(),
-      ));
-    $this->assertEqual($entity->language()->getId(), $this->languageManager->getDefaultLanguage()->getId(), format_string('%entity_type: Entity created with API has default language.', array('%entity_type' => $entity_type)));
+      ]);
+    $this->assertEqual($entity->language()->getId(), $this->languageManager->getDefaultLanguage()->getId(), format_string('%entity_type: Entity created with API has default language.', ['%entity_type' => $entity_type]));
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'name' => 'test',
         'user_id' => \Drupal::currentUser()->id(),
         $langcode_key => LanguageInterface::LANGCODE_NOT_SPECIFIED,
-      ));
+      ]);
 
-    $this->assertEqual($entity->language()->getId(), LanguageInterface::LANGCODE_NOT_SPECIFIED, format_string('%entity_type: Entity language not specified.', array('%entity_type' => $entity_type)));
-    $this->assertFalse($entity->getTranslationLanguages(FALSE), format_string('%entity_type: No translations are available', array('%entity_type' => $entity_type)));
+    $this->assertEqual($entity->language()->getId(), LanguageInterface::LANGCODE_NOT_SPECIFIED, format_string('%entity_type: Entity language not specified.', ['%entity_type' => $entity_type]));
+    $this->assertFalse($entity->getTranslationLanguages(FALSE), format_string('%entity_type: No translations are available', ['%entity_type' => $entity_type]));
 
     // Set the value in default language.
-    $entity->set($this->fieldName, array(0 => array('value' => 'default value')));
+    $entity->set($this->fieldName, [0 => ['value' => 'default value']]);
     // Get the value.
     $field = $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT)->get($this->fieldName);
-    $this->assertEqual($field->value, 'default value', format_string('%entity_type: Untranslated value retrieved.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($field->getLangcode(), LanguageInterface::LANGCODE_NOT_SPECIFIED, format_string('%entity_type: Field object has the expected langcode.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($field->value, 'default value', format_string('%entity_type: Untranslated value retrieved.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($field->getLangcode(), LanguageInterface::LANGCODE_NOT_SPECIFIED, format_string('%entity_type: Field object has the expected langcode.', ['%entity_type' => $entity_type]));
 
     // Try to get add a translation to language neutral entity.
     $message = 'Adding a translation to a language-neutral entity results in an error.';
@@ -74,22 +74,22 @@ protected function doTestEntityLanguageMethods($entity_type) {
     // translating it.
     $default_langcode = $this->langcodes[0];
     $entity->{$langcode_key}->value = $default_langcode;
-    $entity->{$this->fieldName} = array();
-    $this->assertEqual($entity->language(), \Drupal::languageManager()->getLanguage($this->langcodes[0]), format_string('%entity_type: Entity language retrieved.', array('%entity_type' => $entity_type)));
-    $this->assertFalse($entity->getTranslationLanguages(FALSE), format_string('%entity_type: No translations are available', array('%entity_type' => $entity_type)));
+    $entity->{$this->fieldName} = [];
+    $this->assertEqual($entity->language(), \Drupal::languageManager()->getLanguage($this->langcodes[0]), format_string('%entity_type: Entity language retrieved.', ['%entity_type' => $entity_type]));
+    $this->assertFalse($entity->getTranslationLanguages(FALSE), format_string('%entity_type: No translations are available', ['%entity_type' => $entity_type]));
 
     // Set the value in default language.
-    $entity->set($this->fieldName, array(0 => array('value' => 'default value')));
+    $entity->set($this->fieldName, [0 => ['value' => 'default value']]);
     // Get the value.
     $field = $entity->get($this->fieldName);
-    $this->assertEqual($field->value, 'default value', format_string('%entity_type: Untranslated value retrieved.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($field->getLangcode(), $default_langcode, format_string('%entity_type: Field object has the expected langcode.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($field->value, 'default value', format_string('%entity_type: Untranslated value retrieved.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($field->getLangcode(), $default_langcode, format_string('%entity_type: Field object has the expected langcode.', ['%entity_type' => $entity_type]));
 
     // Set a translation.
-    $entity->addTranslation($this->langcodes[1])->set($this->fieldName, array(0 => array('value' => 'translation 1')));
+    $entity->addTranslation($this->langcodes[1])->set($this->fieldName, [0 => ['value' => 'translation 1']]);
     $field = $entity->getTranslation($this->langcodes[1])->{$this->fieldName};
-    $this->assertEqual($field->value, 'translation 1', format_string('%entity_type: Translated value set.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($field->getLangcode(), $this->langcodes[1], format_string('%entity_type: Field object has the expected langcode.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($field->value, 'translation 1', format_string('%entity_type: Translated value set.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($field->getLangcode(), $this->langcodes[1], format_string('%entity_type: Field object has the expected langcode.', ['%entity_type' => $entity_type]));
 
     // Make sure the untranslated value stays.
     $field = $entity->get($this->fieldName);
@@ -110,7 +110,7 @@ protected function doTestEntityLanguageMethods($entity_type) {
     }
 
     // Try to get a not available translation.
-    $this->assertNull($entity->addTranslation($this->langcodes[2])->get($this->fieldName)->value, format_string('%entity_type: A translation that is not available is NULL.', array('%entity_type' => $entity_type)));
+    $this->assertNull($entity->addTranslation($this->langcodes[2])->get($this->fieldName)->value, format_string('%entity_type: A translation that is not available is NULL.', ['%entity_type' => $entity_type]));
 
     // Try to get a value using an invalid language code.
     $message = 'Getting an invalid translation results in an error.';
@@ -125,19 +125,19 @@ protected function doTestEntityLanguageMethods($entity_type) {
     // Try to set a value using an invalid language code.
     try {
       $entity->getTranslation('invalid')->set($this->fieldName, NULL);
-      $this->fail(format_string('%entity_type: Setting a translation for an invalid language throws an exception.', array('%entity_type' => $entity_type)));
+      $this->fail(format_string('%entity_type: Setting a translation for an invalid language throws an exception.', ['%entity_type' => $entity_type]));
     }
     catch (\InvalidArgumentException $e) {
-      $this->pass(format_string('%entity_type: Setting a translation for an invalid language throws an exception.', array('%entity_type' => $entity_type)));
+      $this->pass(format_string('%entity_type: Setting a translation for an invalid language throws an exception.', ['%entity_type' => $entity_type]));
     }
 
     // Set the value in default language.
     $field_name = 'field_test_text';
-    $entity->getTranslation($this->langcodes[1])->set($field_name, array(0 => array('value' => 'default value2')));
+    $entity->getTranslation($this->langcodes[1])->set($field_name, [0 => ['value' => 'default value2']]);
     // Get the value.
     $field = $entity->get($field_name);
-    $this->assertEqual($field->value, 'default value2', format_string('%entity_type: Untranslated value set into a translation in non-strict mode.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($field->getLangcode(), $default_langcode, format_string('%entity_type: Field object has the expected langcode.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($field->value, 'default value2', format_string('%entity_type: Untranslated value set into a translation in non-strict mode.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($field->getLangcode(), $default_langcode, format_string('%entity_type: Field object has the expected langcode.', ['%entity_type' => $entity_type]));
   }
 
   /**
@@ -171,51 +171,51 @@ protected function doTestMultilingualProperties($entity_type) {
     $entity->save();
     $entity = $storage->load($entity->id());
     $default_langcode = $entity->language()->getId();
-    $this->assertEqual($default_langcode, LanguageInterface::LANGCODE_NOT_SPECIFIED, format_string('%entity_type: Entity created as language neutral.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($default_langcode, LanguageInterface::LANGCODE_NOT_SPECIFIED, format_string('%entity_type: Entity created as language neutral.', ['%entity_type' => $entity_type]));
     $field = $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT)->get('name');
-    $this->assertEqual($name, $field->value, format_string('%entity_type: The entity name has been correctly stored as language neutral.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($default_langcode, $field->getLangcode(), format_string('%entity_type: The field object has the expect langcode.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($uid, $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT)->get('user_id')->target_id, format_string('%entity_type: The entity author has been correctly stored as language neutral.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($name, $field->value, format_string('%entity_type: The entity name has been correctly stored as language neutral.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($default_langcode, $field->getLangcode(), format_string('%entity_type: The field object has the expect langcode.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($uid, $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT)->get('user_id')->target_id, format_string('%entity_type: The entity author has been correctly stored as language neutral.', ['%entity_type' => $entity_type]));
 
     $translation = $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT);
     $field = $translation->get('name');
-    $this->assertEqual($name, $field->value, format_string('%entity_type: The entity name defaults to neutral language.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($default_langcode, $field->getLangcode(), format_string('%entity_type: The field object has the expect langcode.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($uid, $translation->get('user_id')->target_id, format_string('%entity_type: The entity author defaults to neutral language.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($name, $field->value, format_string('%entity_type: The entity name defaults to neutral language.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($default_langcode, $field->getLangcode(), format_string('%entity_type: The field object has the expect langcode.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($uid, $translation->get('user_id')->target_id, format_string('%entity_type: The entity author defaults to neutral language.', ['%entity_type' => $entity_type]));
     $field = $entity->get('name');
-    $this->assertEqual($name, $field->value, format_string('%entity_type: The entity name can be retrieved without specifying a language.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($default_langcode, $field->getLangcode(), format_string('%entity_type: The field object has the expect langcode.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($uid, $entity->get('user_id')->target_id, format_string('%entity_type: The entity author can be retrieved without specifying a language.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($name, $field->value, format_string('%entity_type: The entity name can be retrieved without specifying a language.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($default_langcode, $field->getLangcode(), format_string('%entity_type: The field object has the expect langcode.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($uid, $entity->get('user_id')->target_id, format_string('%entity_type: The entity author can be retrieved without specifying a language.', ['%entity_type' => $entity_type]));
 
     // Create a language-aware entity and check that properties are stored
     // as language-aware.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('name' => $name, 'user_id' => $uid, $langcode_key => $langcode));
+      ->create(['name' => $name, 'user_id' => $uid, $langcode_key => $langcode]);
     $entity->save();
     $entity = $storage->load($entity->id());
     $default_langcode = $entity->language()->getId();
-    $this->assertEqual($default_langcode, $langcode, format_string('%entity_type: Entity created as language specific.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($default_langcode, $langcode, format_string('%entity_type: Entity created as language specific.', ['%entity_type' => $entity_type]));
     $field = $entity->getTranslation($langcode)->get('name');
-    $this->assertEqual($name, $field->value, format_string('%entity_type: The entity name has been correctly stored as a language-aware property.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($default_langcode, $field->getLangcode(), format_string('%entity_type: The field object has the expect langcode.', array('%entity_type' => $entity_type)));
-    $this->assertEqual($uid, $entity->getTranslation($langcode)->get('user_id')->target_id, format_string('%entity_type: The entity author has been correctly stored as a language-aware property.', array('%entity_type' => $entity_type)));
+    $this->assertEqual($name, $field->value, format_string('%entity_type: The entity name has been correctly stored as a language-aware property.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($default_langcode, $field->getLangcode(), format_string('%entity_type: The field object has the expect langcode.', ['%entity_type' => $entity_type]));
+    $this->assertEqual($uid, $entity->getTranslation($langcode)->get('user_id')->target_id, format_string('%entity_type: The entity author has been correctly stored as a language-aware property.', ['%entity_type' => $entity_type]));
 
     // Create property translations.
-    $properties = array();
+    $properties = [];
     $default_langcode = $langcode;
     foreach ($this->langcodes as $langcode) {
       if ($langcode != $default_langcode) {
-        $properties[$langcode] = array(
-          'name' => array(0 => $this->randomMachineName()),
-          'user_id' => array(0 => mt_rand(128, 256)),
-        );
+        $properties[$langcode] = [
+          'name' => [0 => $this->randomMachineName()],
+          'user_id' => [0 => mt_rand(128, 256)],
+        ];
       }
       else {
-        $properties[$langcode] = array(
-          'name' => array(0 => $name),
-          'user_id' => array(0 => $uid),
-        );
+        $properties[$langcode] = [
+          'name' => [0 => $name],
+          'user_id' => [0 => $uid],
+        ];
       }
       $translation = $entity->hasTranslation($langcode) ? $entity->getTranslation($langcode) : $entity->addTranslation($langcode);
       foreach ($properties[$langcode] as $field_name => $values) {
@@ -227,10 +227,10 @@ protected function doTestMultilingualProperties($entity_type) {
     // Check that property translation were correctly stored.
     $entity = $storage->load($entity->id());
     foreach ($this->langcodes as $langcode) {
-      $args = array(
+      $args = [
         '%entity_type' => $entity_type,
         '%langcode' => $langcode,
-      );
+      ];
       $field = $entity->getTranslation($langcode)->get('name');
       $this->assertEqual($properties[$langcode]['name'][0], $field->value, format_string('%entity_type: The entity name has been correctly stored for language %langcode.', $args));
       $field_langcode = ($langcode == $entity->language()->getId()) ? $default_langcode : $langcode;
@@ -254,24 +254,24 @@ protected function doTestMultilingualProperties($entity_type) {
       ->save();
 
     $entities = $storage->loadMultiple();
-    $this->assertEqual(count($entities), 3, format_string('%entity_type: Three entities were created.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entities), 3, format_string('%entity_type: Three entities were created.', ['%entity_type' => $entity_type]));
     $entities = $storage->loadMultiple([$translated_id]);
-    $this->assertEqual(count($entities), 1, format_string('%entity_type: One entity correctly loaded by id.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entities), 1, format_string('%entity_type: One entity correctly loaded by id.', ['%entity_type' => $entity_type]));
     $entities = $storage->loadByProperties(['name' => $name]);
-    $this->assertEqual(count($entities), 2, format_string('%entity_type: Two entities correctly loaded by name.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entities), 2, format_string('%entity_type: Two entities correctly loaded by name.', ['%entity_type' => $entity_type]));
     // @todo The default language condition should go away in favor of an
     // explicit parameter.
     $entities = $storage->loadByProperties(['name' => $properties[$langcode]['name'][0], $default_langcode_key => 0]);
-    $this->assertEqual(count($entities), 1, format_string('%entity_type: One entity correctly loaded by name translation.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entities), 1, format_string('%entity_type: One entity correctly loaded by name translation.', ['%entity_type' => $entity_type]));
     $entities = $storage->loadByProperties([$langcode_key => $default_langcode, 'name' => $name]);
-    $this->assertEqual(count($entities), 1, format_string('%entity_type: One entity correctly loaded by name and language.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entities), 1, format_string('%entity_type: One entity correctly loaded by name and language.', ['%entity_type' => $entity_type]));
 
     $entities = $storage->loadByProperties([$langcode_key => $langcode, 'name' => $properties[$langcode]['name'][0]]);
-    $this->assertEqual(count($entities), 0, format_string('%entity_type: No entity loaded by name translation specifying the translation language.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entities), 0, format_string('%entity_type: No entity loaded by name translation specifying the translation language.', ['%entity_type' => $entity_type]));
     $entities = $storage->loadByProperties([$langcode_key => $langcode, 'name' => $properties[$langcode]['name'][0], $default_langcode_key => 0]);
-    $this->assertEqual(count($entities), 1, format_string('%entity_type: One entity loaded by name translation and language specifying to look for translations.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entities), 1, format_string('%entity_type: One entity loaded by name translation and language specifying to look for translations.', ['%entity_type' => $entity_type]));
     $entities = $storage->loadByProperties(['user_id' => $properties[$langcode]['user_id'][0], $default_langcode_key => NULL]);
-    $this->assertEqual(count($entities), 2, format_string('%entity_type: Two entities loaded by uid without caring about property translatability.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($entities), 2, format_string('%entity_type: Two entities loaded by uid without caring about property translatability.', ['%entity_type' => $entity_type]));
 
     // Test property conditions and orders with multiple languages in the same
     // query.
@@ -283,13 +283,13 @@ protected function doTestMultilingualProperties($entity_type) {
       ->condition($group)
       ->condition('name', $properties[$langcode]['name'][0], '=', $langcode)
       ->execute();
-    $this->assertEqual(count($result), 1, format_string('%entity_type: One entity loaded by name and uid using different language meta conditions.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($result), 1, format_string('%entity_type: One entity loaded by name and uid using different language meta conditions.', ['%entity_type' => $entity_type]));
 
     // Test mixed property and field conditions.
     $storage->resetCache($result);
     $entity = $storage->load(reset($result));
     $field_value = $this->randomString();
-    $entity->getTranslation($langcode)->set($this->fieldName, array(array('value' => $field_value)));
+    $entity->getTranslation($langcode)->set($this->fieldName, [['value' => $field_value]]);
     $entity->save();
     $query = \Drupal::entityQuery($entity_type);
     $default_langcode_group = $query->andConditionGroup()
@@ -303,7 +303,7 @@ protected function doTestMultilingualProperties($entity_type) {
       ->condition($default_langcode_group)
       ->condition($langcode_group)
       ->execute();
-    $this->assertEqual(count($result), 1, format_string('%entity_type: One entity loaded by name, uid and field value using different language meta conditions.', array('%entity_type' => $entity_type)));
+    $this->assertEqual(count($result), 1, format_string('%entity_type: One entity loaded by name, uid and field value using different language meta conditions.', ['%entity_type' => $entity_type]));
   }
 
   /**
@@ -331,7 +331,7 @@ protected function doTestEntityTranslationAPI($entity_type) {
     /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
     $entity = $this->entityManager
       ->getStorage($entity_type)
-      ->create(array('name' => $this->randomMachineName(), $langcode_key => LanguageInterface::LANGCODE_NOT_SPECIFIED));
+      ->create(['name' => $this->randomMachineName(), $langcode_key => LanguageInterface::LANGCODE_NOT_SPECIFIED]);
 
     $entity->save();
     $hooks = $this->getHooksInfo();
@@ -462,8 +462,8 @@ protected function doTestEntityTranslationAPI($entity_type) {
     $entity = $this->reloadEntity($entity);
     $translation = $entity->getTranslation($langcode2);
     $entity->removeTranslation($langcode2);
-    foreach (array('get', 'set', '__get', '__set', 'createDuplicate') as $method) {
-      $message = format_string('The @method method raises an exception when trying to manipulate a removed translation.', array('@method' => $method));
+    foreach (['get', 'set', '__get', '__set', 'createDuplicate'] as $method) {
+      $message = format_string('The @method method raises an exception when trying to manipulate a removed translation.', ['@method' => $method]);
       try {
         $translation->{$method}('name', $this->randomMachineName());
         $this->fail($message);
@@ -484,8 +484,8 @@ protected function doTestEntityTranslationAPI($entity_type) {
 
     // Check that removing an invalid translation causes an exception to be
     // thrown.
-    foreach (array($default_langcode, LanguageInterface::LANGCODE_DEFAULT, $this->randomMachineName()) as $invalid_langcode) {
-      $message = format_string('Removing an invalid translation (@langcode) causes an exception to be thrown.', array('@langcode' => $invalid_langcode));
+    foreach ([$default_langcode, LanguageInterface::LANGCODE_DEFAULT, $this->randomMachineName()] as $invalid_langcode) {
+      $message = format_string('Removing an invalid translation (@langcode) causes an exception to be thrown.', ['@langcode' => $invalid_langcode]);
       try {
         $entity->removeTranslation($invalid_langcode);
         $this->fail($message);
@@ -566,16 +566,16 @@ protected function doTestEntityTranslationAPI($entity_type) {
       ->getStorage('entity_test_mul_default_value')
       ->create(['name' => $this->randomMachineName(), 'langcode' => $langcode]);
     $translation = $entity->addTranslation($langcode2);
-    $expected = array(
-      array(
+    $expected = [
+      [
         'shape' => "shape:0:description_$langcode2",
         'color' => "color:0:description_$langcode2",
-      ),
-      array(
+      ],
+      [
         'shape' => "shape:1:description_$langcode2",
         'color' => "color:1:description_$langcode2",
-      ),
-    );
+      ],
+    ];
     $this->assertEqual($translation->description->getValue(), $expected, 'Language-aware default values correctly populated.');
     $this->assertEqual($translation->description->getLangcode(), $langcode2, 'Field object has the expected langcode.');
 
@@ -606,7 +606,7 @@ protected function doTestLanguageFallback($entity_type) {
     $current_langcode = $this->languageManager->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId();
     $this->langcodes[] = $current_langcode;
 
-    $values = array();
+    $values = [];
     foreach ($this->langcodes as $langcode) {
       $values[$langcode]['name'] = $this->randomMachineName();
       $values[$langcode]['user_id'] = mt_rand(0, 127);
@@ -623,7 +623,7 @@ protected function doTestLanguageFallback($entity_type) {
     $this->languageManager->reset();
 
     $controller = $this->entityManager->getStorage($entity_type);
-    $entity = $controller->create(array($langcode_key => $default_langcode) + $values[$default_langcode]);
+    $entity = $controller->create([$langcode_key => $default_langcode] + $values[$default_langcode]);
     $entity->save();
 
     $entity->addTranslation($langcode, $values[$langcode]);
@@ -649,7 +649,7 @@ protected function doTestLanguageFallback($entity_type) {
     $this->assertEqual($current_langcode, $translation->language()->getId(), 'The current translation language matches the current language.');
 
     // Check that if the entity has no translation no fallback is applied.
-    $entity2 = $controller->create(array($langcode_key => $default_langcode));
+    $entity2 = $controller->create([$langcode_key => $default_langcode]);
     // Get an view builder.
     $controller = $this->entityManager->getViewBuilder($entity_type);
     $entity2_build = $controller->view($entity2);
@@ -686,12 +686,12 @@ function testFieldDefinitions() {
     // Check that field translatability can be altered to be enabled or disabled
     // in field definitions.
     $entity_type = 'entity_test_mulrev';
-    $this->state->set('entity_test.field_definitions.translatable', array('name' => FALSE));
+    $this->state->set('entity_test.field_definitions.translatable', ['name' => FALSE]);
     $this->entityManager->clearCachedFieldDefinitions();
     $definitions = $this->entityManager->getBaseFieldDefinitions($entity_type);
     $this->assertFalse($definitions['name']->isTranslatable(), 'Field translatability can be disabled programmatically.');
 
-    $this->state->set('entity_test.field_definitions.translatable', array('name' => TRUE));
+    $this->state->set('entity_test.field_definitions.translatable', ['name' => TRUE]);
     $this->entityManager->clearCachedFieldDefinitions();
     $definitions = $this->entityManager->getBaseFieldDefinitions($entity_type);
     $this->assertTrue($definitions['name']->isTranslatable(), 'Field translatability can be enabled programmatically.');
@@ -702,17 +702,17 @@ function testFieldDefinitions() {
     $this->assertFalse($definitions['id']->isTranslatable(), 'Field translatability is disabled by default.');
 
     // Check that entity id keys have the expect translatability.
-    $translatable_fields = array(
+    $translatable_fields = [
       'id' => TRUE,
       'uuid' => TRUE,
       'revision_id' => TRUE,
       'type' => TRUE,
       'langcode' => FALSE,
-    );
+    ];
     foreach ($translatable_fields as $name => $translatable) {
-      $this->state->set('entity_test.field_definitions.translatable', array($name => $translatable));
+      $this->state->set('entity_test.field_definitions.translatable', [$name => $translatable]);
       $this->entityManager->clearCachedFieldDefinitions();
-      $message = format_string('Field %field cannot be translatable.', array('%field' => $name));
+      $message = format_string('Field %field cannot be translatable.', ['%field' => $name]);
 
       try {
         $this->entityManager->getBaseFieldDefinitions($entity_type);
@@ -747,13 +747,13 @@ protected function doTestLanguageChange($entity_type) {
 
     // check that field languages match entity language regardless of field
     // translatability.
-    $values = array(
+    $values = [
       $langcode_key => $langcode,
       $this->fieldName => $this->randomMachineName(),
       $this->untranslatableFieldName => $this->randomMachineName(),
-    );
+    ];
     $entity = $controller->create($values);
-    foreach (array($this->fieldName, $this->untranslatableFieldName) as $field_name) {
+    foreach ([$this->fieldName, $this->untranslatableFieldName] as $field_name) {
       $this->assertEqual($entity->get($field_name)->getLangcode(), $langcode, 'Field language works as expected.');
     }
 
@@ -761,16 +761,16 @@ protected function doTestLanguageChange($entity_type) {
     // changing it.
     $langcode = $this->langcodes[1];
     $entity->{$langcode_key}->value = $langcode;
-    foreach (array($this->fieldName, $this->untranslatableFieldName) as $field_name) {
+    foreach ([$this->fieldName, $this->untranslatableFieldName] as $field_name) {
       $this->assertEqual($entity->get($field_name)->getLangcode(), $langcode, 'Field language works as expected after changing entity language.');
     }
 
     // Check that entity translation does not affect the language of original
     // field values and untranslatable ones.
     $langcode = $this->langcodes[0];
-    $entity->addTranslation($this->langcodes[2], array($this->fieldName => $this->randomMachineName()));
+    $entity->addTranslation($this->langcodes[2], [$this->fieldName => $this->randomMachineName()]);
     $entity->{$langcode_key}->value = $langcode;
-    foreach (array($this->fieldName, $this->untranslatableFieldName) as $field_name) {
+    foreach ([$this->fieldName, $this->untranslatableFieldName] as $field_name) {
       $this->assertEqual($entity->get($field_name)->getLangcode(), $langcode, 'Field language works as expected after translating the entity and changing language.');
     }
 
@@ -792,21 +792,21 @@ protected function doTestLanguageChange($entity_type) {
   function testEntityAdapter() {
     $entity_type = 'entity_test';
     $default_langcode = 'en';
-    $values[$default_langcode] = array('name' => $this->randomString());
+    $values[$default_langcode] = ['name' => $this->randomString()];
     $controller = $this->entityManager->getStorage($entity_type);
     /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
     $entity = $controller->create($values[$default_langcode]);
 
     foreach ($this->langcodes as $langcode) {
-      $values[$langcode] = array('name' => $this->randomString());
+      $values[$langcode] = ['name' => $this->randomString()];
       $entity->addTranslation($langcode, $values[$langcode]);
     }
 
-    $langcodes = array_merge(array($default_langcode), $this->langcodes);
+    $langcodes = array_merge([$default_langcode], $this->langcodes);
     foreach ($langcodes as $langcode) {
       $adapter = $entity->getTranslation($langcode)->getTypedData();
       $name = $adapter->get('name')->value;
-      $this->assertEqual($name, $values[$langcode]['name'], SafeMarkup::format('Name correctly retrieved from "@langcode" adapter', array('@langcode' => $langcode)));
+      $this->assertEqual($name, $values[$langcode]['name'], SafeMarkup::format('Name correctly retrieved from "@langcode" adapter', ['@langcode' => $langcode]));
     }
   }
 
@@ -879,11 +879,11 @@ public function testDeleteEntityTranslation() {
     $field->save();
 
     // Create an entity with both translatable and untranslatable test fields.
-    $values = array(
+    $values = [
       'name' => $this->randomString(),
       'translatable_test_field' => $this->randomString(),
       'untranslatable_test_field' => $this->randomString(),
-    );
+    ];
 
     /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
     $entity = $controller->create($values);
@@ -940,11 +940,11 @@ public function testTranslationStatus() {
     $storage = $this->entityManager->getStorage($entity_type);
 
     // Create an entity with both translatable and untranslatable test fields.
-    $values = array(
+    $values = [
       'name' => $this->randomString(),
       'translatable_test_field' => $this->randomString(),
       'untranslatable_test_field' => $this->randomString(),
-    );
+    ];
 
     /** @var \Drupal\Core\Entity\ContentEntityInterface|\Drupal\Core\TypedData\TranslationStatusInterface $entity */
     // Test that newly created entity has the translation status
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityTypeConstraintValidatorTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityTypeConstraintValidatorTest.php
index 87d76b484c47d106b0e6c1e37740e11d63151573..3671d6d408e87d3315021bb09b69af36d7b6d52d 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityTypeConstraintValidatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityTypeConstraintValidatorTest.php
@@ -18,7 +18,7 @@ class EntityTypeConstraintValidatorTest extends EntityKernelTestBase {
    */
   protected $typedData;
 
-  public static $modules = array('node', 'field', 'user');
+  public static $modules = ['node', 'field', 'user'];
 
   protected function setUp() {
     parent::setUp();
@@ -32,13 +32,13 @@ public function testValidation() {
     // Create a typed data definition with an EntityType constraint.
     $entity_type = 'node';
     $definition = DataDefinition::create('entity_reference')
-      ->setConstraints(array(
+      ->setConstraints([
         'EntityType' => $entity_type,
-      )
+      ]
     );
 
     // Test the validation.
-    $node = $this->container->get('entity.manager')->getStorage('node')->create(array('type' => 'page'));
+    $node = $this->container->get('entity.manager')->getStorage('node')->create(['type' => 'page']);
     $typed_data = $this->typedData->create($definition, $node);
     $violations = $typed_data->validate();
     $this->assertEqual($violations->count(), 0, 'Validation passed for correct value.');
@@ -53,7 +53,7 @@ public function testValidation() {
 
     // Make sure the information provided by a violation is correct.
     $violation = $violations[0];
-    $this->assertEqual($violation->getMessage(), t('The entity must be of type %type.', array('%type' => $entity_type)), 'The message for invalid value is correct.');
+    $this->assertEqual($violation->getMessage(), t('The entity must be of type %type.', ['%type' => $entity_type]), 'The message for invalid value is correct.');
     $this->assertEqual($violation->getRoot(), $typed_data, 'Violation root is correct.');
     $this->assertEqual($violation->getInvalidValue(), $account, 'The invalid value is set correctly in the violation.');
   }
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityTypedDataDefinitionTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityTypedDataDefinitionTest.php
index b61a6dd412d3d33a6914a47946f958a5f1fb046a..9d5095d1494b9712d51bd84c0fdb62a72b9784c7 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityTypedDataDefinitionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityTypedDataDefinitionTest.php
@@ -31,7 +31,7 @@ class EntityTypedDataDefinitionTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'text', 'node', 'user');
+  public static $modules = ['filter', 'text', 'node', 'user'];
 
   protected function setUp() {
     parent::setup();
@@ -51,14 +51,14 @@ public function testFields() {
     $this->assertTrue($field_item_definition instanceof ComplexDataDefinitionInterface);
 
     // Derive metadata about field item properties.
-    $this->assertEqual(array_keys($field_item_definition->getPropertyDefinitions()), array('value'));
+    $this->assertEqual(array_keys($field_item_definition->getPropertyDefinitions()), ['value']);
     $this->assertEqual($field_item_definition->getPropertyDefinition('value')->getDataType(), 'integer');
     $this->assertEqual($field_item_definition->getMainPropertyName(), 'value');
     $this->assertNull($field_item_definition->getPropertyDefinition('invalid'));
 
     // Test accessing field item property metadata via the field definition.
     $this->assertTrue($field_definition instanceof FieldDefinitionInterface);
-    $this->assertEqual(array_keys($field_definition->getPropertyDefinitions()), array('value'));
+    $this->assertEqual(array_keys($field_definition->getPropertyDefinitions()), ['value']);
     $this->assertEqual($field_definition->getPropertyDefinition('value')->getDataType(), 'integer');
     $this->assertEqual($field_definition->getMainPropertyName(), 'value');
     $this->assertNull($field_definition->getPropertyDefinition('invalid'));
@@ -106,7 +106,7 @@ public function testEntities() {
 
     // Config entities don't support typed data.
     $entity_definition = EntityDataDefinition::create('node_type');
-    $this->assertEqual(array(), $entity_definition->getPropertyDefinitions());
+    $this->assertEqual([], $entity_definition->getPropertyDefinitions());
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityUUIDTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityUUIDTest.php
index ae26ec590bcf58281bd368ea50693a7ffaa7f7bd..c76ea6a86130e66efc72bb37db09e2cc26f51edc 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityUUIDTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityUUIDTest.php
@@ -42,10 +42,10 @@ protected function assertCRUD($entity_type) {
     $uuid = $uuid_service->generate();
     $custom_entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'name' => $this->randomMachineName(),
         'uuid' => $uuid,
-      ));
+      ]);
     $this->assertIdentical($custom_entity->uuid(), $uuid);
     // Save this entity, so we have more than one later.
     $custom_entity->save();
@@ -53,7 +53,7 @@ protected function assertCRUD($entity_type) {
     // Verify that a new UUID is generated upon creating an entity.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('name' => $this->randomMachineName()));
+      ->create(['name' => $this->randomMachineName()]);
     $uuid = $entity->uuid();
     $this->assertTrue($uuid);
 
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityValidationTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityValidationTest.php
index dc7d94f06031ac9dc36343b69cece94e4e379226..bf2a147e0a1456245fd45e57ac026e9d19b60711 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityValidationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityValidationTest.php
@@ -16,7 +16,7 @@ class EntityValidationTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('filter', 'text');
+  public static $modules = ['filter', 'text'];
 
   /**
    * @var string
@@ -44,7 +44,7 @@ protected function setUp() {
     entity_test_install();
 
     // Install required default configuration for filter module.
-    $this->installConfig(array('system', 'filter'));
+    $this->installConfig(['system', 'filter']);
   }
 
   /**
@@ -123,13 +123,13 @@ protected function checkValidation($entity_type) {
     $test_entity->id->value = -1;
     $violations = $test_entity->validate();
     $this->assertEqual($violations->count(), 1, 'Validation failed.');
-    $this->assertEqual($violations[0]->getMessage(), t('%name: The integer must be larger or equal to %min.', array('%name' => 'ID', '%min' => 0)));
+    $this->assertEqual($violations[0]->getMessage(), t('%name: The integer must be larger or equal to %min.', ['%name' => 'ID', '%min' => 0]));
 
     $test_entity = clone $entity;
     $test_entity->uuid->value = $this->randomString(129);
     $violations = $test_entity->validate();
     $this->assertEqual($violations->count(), 1, 'Validation failed.');
-    $this->assertEqual($violations[0]->getMessage(), t('%name: may not be longer than @max characters.', array('%name' => 'UUID', '@max' => 128)));
+    $this->assertEqual($violations[0]->getMessage(), t('%name: may not be longer than @max characters.', ['%name' => 'UUID', '@max' => 128]));
 
     $test_entity = clone $entity;
     $langcode_key = $this->entityManager->getDefinition($entity_type)->getKey('langcode');
@@ -137,7 +137,7 @@ protected function checkValidation($entity_type) {
     $violations = $test_entity->validate();
     // This should fail on AllowedValues and Length constraints.
     $this->assertEqual($violations->count(), 2, 'Validation failed.');
-    $this->assertEqual($violations[0]->getMessage(), t('This value is too long. It should have %limit characters or less.', array('%limit' => '12')));
+    $this->assertEqual($violations[0]->getMessage(), t('This value is too long. It should have %limit characters or less.', ['%limit' => '12']));
     $this->assertEqual($violations[1]->getMessage(), t('The value you selected is not a valid choice.'));
 
     $test_entity = clone $entity;
@@ -150,7 +150,7 @@ protected function checkValidation($entity_type) {
     $test_entity->name->value = $this->randomString(33);
     $violations = $test_entity->validate();
     $this->assertEqual($violations->count(), 1, 'Validation failed.');
-    $this->assertEqual($violations[0]->getMessage(), t('%name: may not be longer than @max characters.', array('%name' => 'Name', '@max' => 32)));
+    $this->assertEqual($violations[0]->getMessage(), t('%name: may not be longer than @max characters.', ['%name' => 'Name', '@max' => 32]));
 
     // Make sure the information provided by a violation is correct.
     $violation = $violations[0];
@@ -162,7 +162,7 @@ protected function checkValidation($entity_type) {
     $test_entity->set('user_id', 9999);
     $violations = $test_entity->validate();
     $this->assertEqual($violations->count(), 1, 'Validation failed.');
-    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%type: %id) does not exist.', array('%type' => 'user', '%id' => 9999)));
+    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%type: %id) does not exist.', ['%type' => 'user', '%id' => 9999]));
 
     $test_entity = clone $entity;
     $test_entity->field_test_text->format = $this->randomString(33);
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityViewBuilderTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityViewBuilderTest.php
index 0143128f19749aedca1e6b2dea55fe9b894061ac..e1537bc809c6c3e93f26128a6d757ec119908353 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityViewBuilderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityViewBuilderTest.php
@@ -23,7 +23,7 @@ class EntityViewBuilderTest extends EntityKernelTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('user', 'entity_test'));
+    $this->installConfig(['user', 'entity_test']);
 
     // Give anonymous users permission to view test entities.
     Role::load(RoleInterface::ANONYMOUS_ID)
@@ -182,7 +182,7 @@ public function testEntityViewBuilderWeight() {
 
     // Set a weight for the label component.
     entity_get_display('entity_test', 'entity_test', 'full')
-      ->setComponent('label', array('weight' => 20))
+      ->setComponent('label', ['weight' => 20])
       ->save();
 
     // Create and build a test entity.
@@ -204,10 +204,10 @@ public function testEntityViewBuilderWeight() {
    *   The created entity.
    */
   protected function createTestEntity($entity_type) {
-    $data = array(
+    $data = [
       'bundle' => $entity_type,
       'name' => $this->randomMachineName(),
-    );
+    ];
     return $this->container->get('entity.manager')->getStorage($entity_type)->create($data);
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/FieldSqlStorageTest.php b/core/tests/Drupal/KernelTests/Core/Entity/FieldSqlStorageTest.php
index 449f3f238416a82c6d8489d1f3c2bdeb9ca594e7..30e817d1db78f579136001fcfdf49a5e0b7ce14b 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/FieldSqlStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/FieldSqlStorageTest.php
@@ -23,7 +23,7 @@ class FieldSqlStorageTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field', 'field_test', 'text', 'entity_test');
+  public static $modules = ['field', 'field_test', 'text', 'entity_test'];
 
   /**
    * The name of the created field.
@@ -80,12 +80,12 @@ protected function setUp() {
 
     $this->fieldName = strtolower($this->randomMachineName());
     $this->fieldCardinality = 4;
-    $this->fieldStorage = FieldStorageConfig::create(array(
+    $this->fieldStorage = FieldStorageConfig::create([
       'field_name' => $this->fieldName,
       'entity_type' => $entity_type,
       'type' => 'test_field',
       'cardinality' => $this->fieldCardinality,
-    ));
+    ]);
     $this->fieldStorage->save();
     $this->field = FieldConfig::create([
       'field_storage' => $this->fieldStorage,
@@ -107,10 +107,10 @@ function testFieldLoad() {
     $entity_type = $bundle = 'entity_test_rev';
     $storage = $this->container->get('entity.manager')->getStorage($entity_type);
 
-    $columns = array('bundle', 'deleted', 'entity_id', 'revision_id', 'delta', 'langcode', $this->tableMapping->getFieldColumnName($this->fieldStorage, 'value'));
+    $columns = ['bundle', 'deleted', 'entity_id', 'revision_id', 'delta', 'langcode', $this->tableMapping->getFieldColumnName($this->fieldStorage, 'value')];
 
     // Create an entity with four revisions.
-    $revision_ids = array();
+    $revision_ids = [];
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
       ->create();
@@ -123,20 +123,20 @@ function testFieldLoad() {
     }
 
     // Generate values and insert them directly in the storage tables.
-    $values = array();
+    $values = [];
     $query = db_insert($this->revisionTable)->fields($columns);
     foreach ($revision_ids as $revision_id) {
       // Put one value too many.
       for ($delta = 0; $delta <= $this->fieldCardinality; $delta++) {
         $value = mt_rand(1, 127);
         $values[$revision_id][] = $value;
-        $query->values(array($bundle, 0, $entity->id(), $revision_id, $delta, $entity->language()->getId(), $value));
+        $query->values([$bundle, 0, $entity->id(), $revision_id, $delta, $entity->language()->getId(), $value]);
       }
       $query->execute();
     }
     $query = db_insert($this->table)->fields($columns);
     foreach ($values[$revision_id] as $delta => $value) {
-      $query->values(array($bundle, 0, $entity->id(), $revision_id, $delta, $entity->language()->getId(), $value));
+      $query->values([$bundle, 0, $entity->id(), $revision_id, $delta, $entity->language()->getId(), $value]);
     }
     $query->execute();
 
@@ -167,7 +167,7 @@ function testFieldLoad() {
     // Add a translation in an unavailable language code and verify it is not
     // loaded.
     $unavailable_langcode = 'xx';
-    $values = array($bundle, 0, $entity->id(), $entity->getRevisionId(), 0, $unavailable_langcode, mt_rand(1, 127));
+    $values = [$bundle, 0, $entity->id(), $entity->getRevisionId(), 0, $unavailable_langcode, mt_rand(1, 127)];
     db_insert($this->table)->fields($columns)->values($values)->execute();
     db_insert($this->revisionTable)->fields($columns)->values($values)->execute();
     $entity = $storage->load($entity->id());
@@ -183,10 +183,10 @@ function testFieldWrite() {
       ->getStorage($entity_type)
       ->create();
 
-    $revision_values = array();
+    $revision_values = [];
 
     // Check insert. Add one value too many.
-    $values = array();
+    $values = [];
     for ($delta = 0; $delta <= $this->fieldCardinality; $delta++) {
       $values[$delta]['value'] = mt_rand(1, 127);
     }
@@ -197,7 +197,7 @@ function testFieldWrite() {
     $rows = db_select($this->table, 't')->fields('t')->execute()->fetchAllAssoc('delta', \PDO::FETCH_ASSOC);
     $this->assertEqual(count($rows), $this->fieldCardinality);
     foreach ($rows as $delta => $row) {
-      $expected = array(
+      $expected = [
         'bundle' => $bundle,
         'deleted' => 0,
         'entity_id' => $entity->id(),
@@ -205,13 +205,13 @@ function testFieldWrite() {
         'langcode' => $entity->language()->getId(),
         'delta' => $delta,
         $this->fieldName . '_value' => $values[$delta]['value'],
-      );
+      ];
       $this->assertEqual($row, $expected, "Row $delta was stored as expected.");
     }
 
     // Test update. Add less values and check that the previous values did not
     // persist.
-    $values = array();
+    $values = [];
     for ($delta = 0; $delta <= $this->fieldCardinality - 2; $delta++) {
       $values[$delta]['value'] = mt_rand(1, 127);
     }
@@ -220,7 +220,7 @@ function testFieldWrite() {
     $rows = db_select($this->table, 't')->fields('t')->execute()->fetchAllAssoc('delta', \PDO::FETCH_ASSOC);
     $this->assertEqual(count($rows), count($values));
     foreach ($rows as $delta => $row) {
-      $expected = array(
+      $expected = [
         'bundle' => $bundle,
         'deleted' => 0,
         'entity_id' => $entity->id(),
@@ -228,13 +228,13 @@ function testFieldWrite() {
         'langcode' => $entity->language()->getId(),
         'delta' => $delta,
         $this->fieldName . '_value' => $values[$delta]['value'],
-      );
+      ];
       $this->assertEqual($row, $expected, "Row $delta was stored as expected.");
     }
 
     // Create a new revision.
     $revision_values[$entity->getRevisionId()] = $values;
-    $values = array();
+    $values = [];
     for ($delta = 0; $delta < $this->fieldCardinality; $delta++) {
       $values[$delta]['value'] = mt_rand(1, 127);
     }
@@ -248,7 +248,7 @@ function testFieldWrite() {
       $rows = db_select($this->revisionTable, 't')->fields('t')->condition('revision_id', $revision_id)->execute()->fetchAllAssoc('delta', \PDO::FETCH_ASSOC);
       $this->assertEqual(count($rows), min(count($values), $this->fieldCardinality));
       foreach ($rows as $delta => $row) {
-        $expected = array(
+        $expected = [
           'bundle' => $bundle,
           'deleted' => 0,
           'entity_id' => $entity->id(),
@@ -256,7 +256,7 @@ function testFieldWrite() {
           'langcode' => $entity->language()->getId(),
           'delta' => $delta,
           $this->fieldName . '_value' => $values[$delta]['value'],
-        );
+        ];
         $this->assertEqual($row, $expected, "Row $delta was stored as expected.");
       }
     }
@@ -279,15 +279,15 @@ function testLongNames() {
 
     // Create two fields and generate random values.
     $name_base = Unicode::strtolower($this->randomMachineName(FieldStorageConfig::NAME_MAX_LENGTH - 1));
-    $field_names = array();
-    $values = array();
+    $field_names = [];
+    $values = [];
     for ($i = 0; $i < 2; $i++) {
       $field_names[$i] = $name_base . $i;
-      FieldStorageConfig::create(array(
+      FieldStorageConfig::create([
         'field_name' => $field_names[$i],
         'entity_type' => $entity_type,
         'type' => 'test_field',
-      ))->save();
+      ])->save();
       FieldConfig::create([
         'field_name' => $field_names[$i],
         'entity_type' => $entity_type,
@@ -315,12 +315,12 @@ function testLongNames() {
   function testUpdateFieldSchemaWithData() {
     $entity_type = 'entity_test_rev';
     // Create a decimal 5.2 field and add some data.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'decimal52',
       'entity_type' => $entity_type,
       'type' => 'decimal',
-      'settings' => array('precision' => 5, 'scale' => 2),
-    ));
+      'settings' => ['precision' => 5, 'scale' => 2],
+    ]);
     $field_storage->save();
     $field = FieldConfig::create([
       'field_storage' => $field_storage,
@@ -329,10 +329,10 @@ function testUpdateFieldSchemaWithData() {
     $field->save();
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'id' => 0,
         'revision_id' => 0,
-      ));
+      ]);
     $entity->decimal52->value = '1.235';
     $entity->save();
 
@@ -352,12 +352,12 @@ function testUpdateFieldSchemaWithData() {
    */
   function testFieldUpdateFailure() {
     // Create a text field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => 'test_text',
       'entity_type' => 'entity_test_rev',
       'type' => 'text',
-      'settings' => array('max_length' => 255),
-    ));
+      'settings' => ['max_length' => 255],
+    ]);
     $field_storage->save();
 
     // Attempt to update the field in a way that would break the storage. The
@@ -376,12 +376,12 @@ function testFieldUpdateFailure() {
     }
 
     // Ensure that the field tables are still there.
-    $tables = array(
+    $tables = [
       $this->tableMapping->getDedicatedDataTableName($prior_field_storage),
       $this->tableMapping->getDedicatedRevisionTableName($prior_field_storage),
-    );
+    ];
     foreach ($tables as $table_name) {
-      $this->assertTrue(db_table_exists($table_name), t('Table %table exists.', array('%table' => $table_name)));
+      $this->assertTrue(db_table_exists($table_name), t('Table %table exists.', ['%table' => $table_name]));
     }
   }
 
@@ -392,32 +392,32 @@ function testFieldUpdateIndexesWithData() {
     // Create a decimal field.
     $field_name = 'testfield';
     $entity_type = 'entity_test_rev';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => $entity_type,
       'type' => 'text',
-    ));
+    ]);
     $field_storage->save();
     $field = FieldConfig::create([
       'field_storage' => $field_storage,
       'bundle' => $entity_type,
     ]);
     $field->save();
-    $tables = array($this->tableMapping->getDedicatedDataTableName($field_storage), $this->tableMapping->getDedicatedRevisionTableName($field_storage));
+    $tables = [$this->tableMapping->getDedicatedDataTableName($field_storage), $this->tableMapping->getDedicatedRevisionTableName($field_storage)];
 
     // Verify the indexes we will create do not exist yet.
     foreach ($tables as $table) {
-      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, 'value'), t("No index named value exists in @table", array('@table' => $table)));
-      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, 'value_format'), t("No index named value_format exists in @table", array('@table' => $table)));
+      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, 'value'), t("No index named value exists in @table", ['@table' => $table]));
+      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, 'value_format'), t("No index named value_format exists in @table", ['@table' => $table]));
     }
 
     // Add data so the table cannot be dropped.
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array(
+      ->create([
         'id' => 1,
         'revision_id' => 1,
-      ));
+      ]);
     $entity->$field_name->value = 'field data';
     $entity->enforceIsNew();
     $entity->save();
@@ -426,15 +426,15 @@ function testFieldUpdateIndexesWithData() {
     $field_storage->setIndexes(['value' => [['value', 255]]]);
     $field_storage->save();
     foreach ($tables as $table) {
-      $this->assertTrue(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value"), t("Index on value created in @table", array('@table' => $table)));
+      $this->assertTrue(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value"), t("Index on value created in @table", ['@table' => $table]));
     }
 
     // Add a different index, removing the existing custom one.
     $field_storage->setIndexes(['value_format' => [['value', 127], ['format', 127]]]);
     $field_storage->save();
     foreach ($tables as $table) {
-      $this->assertTrue(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value_format"), t("Index on value_format created in @table", array('@table' => $table)));
-      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value"), t("Index on value removed in @table", array('@table' => $table)));
+      $this->assertTrue(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value_format"), t("Index on value_format created in @table", ['@table' => $table]));
+      $this->assertFalse(Database::getConnection()->schema()->indexExists($table, "{$field_name}_value"), t("Index on value removed in @table", ['@table' => $table]));
     }
 
     // Verify that the tables were not dropped in the process.
@@ -450,12 +450,12 @@ function testFieldSqlStorageForeignKeys() {
     // field_test_field_schema()).
     $field_name = 'testfield';
     $foreign_key_name = 'shape';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
       'type' => 'shape',
-      'settings' => array('foreign_key_name' => $foreign_key_name),
-    ));
+      'settings' => ['foreign_key_name' => $foreign_key_name],
+    ]);
     $field_storage->save();
     // Get the field schema.
     $schema = $field_storage->getSchema();
@@ -487,11 +487,11 @@ public function testTableNames() {
     // Short entity type and field name.
     $entity_type = 'short_entity_type';
     $field_name = 'short_field_name';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'entity_type' => $entity_type,
       'field_name' => $field_name,
       'type' => 'test_field',
-    ));
+    ]);
     $expected = 'short_entity_type__short_field_name';
     $this->assertEqual($this->tableMapping->getDedicatedDataTableName($field_storage), $expected);
     $expected = 'short_entity_type_revision__short_field_name';
@@ -500,11 +500,11 @@ public function testTableNames() {
     // Short entity type, long field name
     $entity_type = 'short_entity_type';
     $field_name = 'long_field_name_abcdefghijklmnopqrstuvwxyz';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'entity_type' => $entity_type,
       'field_name' => $field_name,
       'type' => 'test_field',
-    ));
+    ]);
     $expected = 'short_entity_type__' . substr(hash('sha256', $field_storage->uuid()), 0, 10);
     $this->assertEqual($this->tableMapping->getDedicatedDataTableName($field_storage), $expected);
     $expected = 'short_entity_type_r__' . substr(hash('sha256', $field_storage->uuid()), 0, 10);
@@ -513,11 +513,11 @@ public function testTableNames() {
     // Long entity type, short field name
     $entity_type = 'long_entity_type_abcdefghijklmnopqrstuvwxyz';
     $field_name = 'short_field_name';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'entity_type' => $entity_type,
       'field_name' => $field_name,
       'type' => 'test_field',
-    ));
+    ]);
     $expected = 'long_entity_type_abcdefghijklmnopq__' . substr(hash('sha256', $field_storage->uuid()), 0, 10);
     $this->assertEqual($this->tableMapping->getDedicatedDataTableName($field_storage), $expected);
     $expected = 'long_entity_type_abcdefghijklmnopq_r__' . substr(hash('sha256', $field_storage->uuid()), 0, 10);
@@ -526,31 +526,31 @@ public function testTableNames() {
     // Long entity type and field name.
     $entity_type = 'long_entity_type_abcdefghijklmnopqrstuvwxyz';
     $field_name = 'long_field_name_abcdefghijklmnopqrstuvwxyz';
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'entity_type' => $entity_type,
       'field_name' => $field_name,
       'type' => 'test_field',
-    ));
+    ]);
     $expected = 'long_entity_type_abcdefghijklmnopq__' . substr(hash('sha256', $field_storage->uuid()), 0, 10);
     $this->assertEqual($this->tableMapping->getDedicatedDataTableName($field_storage), $expected);
     $expected = 'long_entity_type_abcdefghijklmnopq_r__' . substr(hash('sha256', $field_storage->uuid()), 0, 10);
     $this->assertEqual($this->tableMapping->getDedicatedRevisionTableName($field_storage), $expected);
     // Try creating a second field and check there are no clashes.
-    $field_storage2 = FieldStorageConfig::create(array(
+    $field_storage2 = FieldStorageConfig::create([
       'entity_type' => $entity_type,
       'field_name' => $field_name . '2',
       'type' => 'test_field',
-    ));
+    ]);
     $this->assertNotEqual($this->tableMapping->getDedicatedDataTableName($field_storage), $this->tableMapping->getDedicatedDataTableName($field_storage2));
     $this->assertNotEqual($this->tableMapping->getDedicatedRevisionTableName($field_storage), $this->tableMapping->getDedicatedRevisionTableName($field_storage2));
 
     // Deleted field.
-    $field_storage = FieldStorageConfig::create(array(
+    $field_storage = FieldStorageConfig::create([
       'entity_type' => 'some_entity_type',
       'field_name' => 'some_field_name',
       'type' => 'test_field',
       'deleted' => TRUE,
-    ));
+    ]);
     $expected = 'field_deleted_data_' . substr(hash('sha256', $field_storage->uuid()), 0, 10);
     $this->assertEqual($this->tableMapping->getDedicatedDataTableName($field_storage, TRUE), $expected);
     $expected = 'field_deleted_revision_' . substr(hash('sha256', $field_storage->uuid()), 0, 10);
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/FieldTranslationSqlStorageTest.php b/core/tests/Drupal/KernelTests/Core/Entity/FieldTranslationSqlStorageTest.php
index b301c64f530b91606847363c65acc70342d78f3c..c398732f3c5bb49b45c706fbbd612648af9e0f1b 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/FieldTranslationSqlStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/FieldTranslationSqlStorageTest.php
@@ -20,10 +20,10 @@ public function testFieldSqlStorage() {
     $entity_type = 'entity_test_mul';
 
     $controller = $this->entityManager->getStorage($entity_type);
-    $values = array(
+    $values = [
       $this->fieldName => $this->randomMachineName(),
       $this->untranslatableFieldName => $this->randomMachineName(),
-    );
+    ];
     $entity = $controller->create($values);
     $entity->save();
 
@@ -45,7 +45,7 @@ public function testFieldSqlStorage() {
     // before.
     $this->toggleFieldTranslatability($entity_type, $entity_type);
     $entity = $this->reloadEntity($entity);
-    foreach (array($this->fieldName, $this->untranslatableFieldName) as $field_name) {
+    foreach ([$this->fieldName, $this->untranslatableFieldName] as $field_name) {
       $this->assertEqual($entity->get($field_name)->value, $values[$field_name], 'Field language works as expected after switching translatability.');
     }
 
@@ -76,7 +76,7 @@ protected function assertFieldStorageLangcode(FieldableEntityInterface $entity,
     $entity_type = $entity->getEntityTypeId();
     $id = $entity->id();
     $langcode = $entity->getUntranslated()->language()->getId();
-    $fields = array($this->fieldName, $this->untranslatableFieldName);
+    $fields = [$this->fieldName, $this->untranslatableFieldName];
     /** @var \Drupal\Core\Entity\Sql\DefaultTableMapping $table_mapping */
     $table_mapping = \Drupal::entityManager()->getStorage($entity_type)->getTableMapping();
 
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/FieldWidgetConstraintValidatorTest.php b/core/tests/Drupal/KernelTests/Core/Entity/FieldWidgetConstraintValidatorTest.php
index 50d173bc284f622c25ccea7516f1e890e90715b8..5ae824b71a2329f099a10b080013075a57e1165a 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/FieldWidgetConstraintValidatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/FieldWidgetConstraintValidatorTest.php
@@ -15,7 +15,7 @@
  */
 class FieldWidgetConstraintValidatorTest extends KernelTestBase {
 
-  public static $modules = array('entity_test', 'field', 'user', 'system');
+  public static $modules = ['entity_test', 'field', 'user', 'system'];
 
   /**
    * {@inheritdoc}
@@ -37,9 +37,9 @@ public function testValidation() {
     $entity_type = 'entity_test_constraint_violation';
     $entity = $this->container->get('entity_type.manager')
       ->getStorage($entity_type)
-      ->create(array('id' => 1, 'revision_id' => 1));
+      ->create(['id' => 1, 'revision_id' => 1]);
     $display = entity_get_form_display($entity_type, $entity_type, 'default');
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $display->buildForm($entity, $form, $form_state);
 
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/ValidReferenceConstraintValidatorTest.php b/core/tests/Drupal/KernelTests/Core/Entity/ValidReferenceConstraintValidatorTest.php
index 64bb933dd36bbbc5f5ccf57f791dffd80c2682ee..a365ea58095fc87ad5a5e86f7efcc7d624c9ea93 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/ValidReferenceConstraintValidatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ValidReferenceConstraintValidatorTest.php
@@ -21,14 +21,14 @@ class ValidReferenceConstraintValidatorTest extends EntityKernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('field', 'user');
+  public static $modules = ['field', 'user'];
 
   /**
    * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('user', array('users_data'));
+    $this->installSchema('user', ['users_data']);
     $this->typedData = $this->container->get('typed_data_manager');
   }
 
@@ -40,18 +40,18 @@ public function testValidation() {
     $entity = $this->createUser();
     // By default entity references already have the ValidReference constraint.
     $definition = BaseFieldDefinition::create('entity_reference')
-      ->setSettings(array('target_type' => 'user'));
+      ->setSettings(['target_type' => 'user']);
 
-    $typed_data = $this->typedData->create($definition, array('target_id' => $entity->id()));
+    $typed_data = $this->typedData->create($definition, ['target_id' => $entity->id()]);
     $violations = $typed_data->validate();
     $this->assertFalse($violations->count(), 'Validation passed for correct value.');
 
     // NULL is also considered a valid reference.
-    $typed_data = $this->typedData->create($definition, array('target_id' => NULL));
+    $typed_data = $this->typedData->create($definition, ['target_id' => NULL]);
     $violations = $typed_data->validate();
     $this->assertFalse($violations->count(), 'Validation passed for correct value.');
 
-    $typed_data = $this->typedData->create($definition, array('target_id' => $entity->id()));
+    $typed_data = $this->typedData->create($definition, ['target_id' => $entity->id()]);
     // Delete the referenced entity.
     $entity->delete();
     $violations = $typed_data->validate();
@@ -59,10 +59,10 @@ public function testValidation() {
 
     // Make sure the information provided by a violation is correct.
     $violation = $violations[0];
-    $this->assertEqual($violation->getMessage(), t('The referenced entity (%type: %id) does not exist.', array(
+    $this->assertEqual($violation->getMessage(), t('The referenced entity (%type: %id) does not exist.', [
       '%type' => 'user',
       '%id' => $entity->id(),
-    )), 'The message for invalid value is correct.');
+    ]), 'The message for invalid value is correct.');
     $this->assertEqual($violation->getRoot(), $typed_data, 'Violation root is correct.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Extension/ModuleImplementsAlterTest.php b/core/tests/Drupal/KernelTests/Core/Extension/ModuleImplementsAlterTest.php
index f55d744f70faa3f01c375e524ed2368505801c4e..c0ec629721c6879d77350612416cb2a465c22023 100644
--- a/core/tests/Drupal/KernelTests/Core/Extension/ModuleImplementsAlterTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Extension/ModuleImplementsAlterTest.php
@@ -32,7 +32,7 @@ function testModuleImplementsAlter() {
       'Module handler instance is still the same.');
 
     // Install the module_test module.
-    \Drupal::service('module_installer')->install(array('module_test'));
+    \Drupal::service('module_installer')->install(['module_test']);
 
     // Assert that the \Drupal::moduleHandler() instance has been replaced.
     $this->assertFalse($module_handler === \Drupal::moduleHandler(),
@@ -76,7 +76,7 @@ function testModuleImplementsAlter() {
   function testModuleImplementsAlterNonExistingImplementation() {
 
     // Install the module_test module.
-    \Drupal::service('module_installer')->install(array('module_test'));
+    \Drupal::service('module_installer')->install(['module_test']);
 
     try {
       // Trigger hook discovery.
diff --git a/core/tests/Drupal/KernelTests/Core/Field/FieldAccessTest.php b/core/tests/Drupal/KernelTests/Core/Field/FieldAccessTest.php
index 5a59a235733acacb61d53d1cf984af5365932343..f019ff2917aaa7dfbfdfdccb921838ab2ba83796 100644
--- a/core/tests/Drupal/KernelTests/Core/Field/FieldAccessTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Field/FieldAccessTest.php
@@ -34,7 +34,7 @@ class FieldAccessTest extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
     // Install field configuration.
-    $this->installConfig(array('field'));
+    $this->installConfig(['field']);
     // The users table is needed for creating dummy user accounts.
     $this->installEntitySchema('user');
     // Register entity_test text field.
@@ -49,18 +49,18 @@ protected function setUp() {
    * @see entity_test_entity_field_access_alter()
    */
   function testFieldAccess() {
-    $values = array(
+    $values = [
       'name' => $this->randomMachineName(),
       'user_id' => 1,
-      'field_test_text' => array(
+      'field_test_text' => [
         'value' => 'no access value',
         'format' => 'full_html',
-      ),
-    );
+      ],
+    ];
     $entity = EntityTest::create($values);
 
     // Create a dummy user account for testing access with.
-    $values = array('name' => 'test');
+    $values = ['name' => 'test'];
     $account = User::create($values);
 
     $this->assertFalse($entity->field_test_text->access('view', $account), 'Access to the field was denied.');
diff --git a/core/tests/Drupal/KernelTests/Core/Field/FieldModuleUninstallValidatorTest.php b/core/tests/Drupal/KernelTests/Core/Field/FieldModuleUninstallValidatorTest.php
index af2fb07e24474876a5a906b3ae9368724294eb6a..b9d545e29f988e83a98f13643b7b116586d698cf 100644
--- a/core/tests/Drupal/KernelTests/Core/Field/FieldModuleUninstallValidatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Field/FieldModuleUninstallValidatorTest.php
@@ -73,7 +73,7 @@ public function testUninstallingModule() {
 
     try {
       $message = 'Module uninstallation fails as the module provides a base field which has content.';
-      $this->getModuleInstaller()->uninstall(array('entity_test_extra'));
+      $this->getModuleInstaller()->uninstall(['entity_test_extra']);
       $this->fail($message);
     }
     catch (ModuleUninstallValidatorException $e) {
@@ -93,7 +93,7 @@ public function testUninstallingModule() {
     ]);
     $entity->save();
     try {
-      $this->getModuleInstaller()->uninstall(array('entity_test_extra'));
+      $this->getModuleInstaller()->uninstall(['entity_test_extra']);
       $this->fail('Module uninstallation fails as the module provides a bundle field which has content.');
     }
     catch (ModuleUninstallValidatorException $e) {
diff --git a/core/tests/Drupal/KernelTests/Core/Field/FieldSettingsTest.php b/core/tests/Drupal/KernelTests/Core/Field/FieldSettingsTest.php
index a55888f6167773a604b08af9e74301ddd9e2f896..583e55b7c4016cb72439795c641ba8bdb91fd5fd 100644
--- a/core/tests/Drupal/KernelTests/Core/Field/FieldSettingsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Field/FieldSettingsTest.php
@@ -19,7 +19,7 @@ class FieldSettingsTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('field', 'field_test');
+  public static $modules = ['field', 'field_test'];
 
   /**
    * @covers \Drupal\Core\Field\BaseFieldDefinition::getSettings
diff --git a/core/tests/Drupal/KernelTests/Core/File/DirectoryTest.php b/core/tests/Drupal/KernelTests/Core/File/DirectoryTest.php
index d7e7c382f6efb5784c6e33556fce51bcc4a579ee..c8aa14ec92d2b2746af4909f76b436b01d88b054 100644
--- a/core/tests/Drupal/KernelTests/Core/File/DirectoryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/DirectoryTest.php
@@ -106,14 +106,14 @@ function testFileCreateNewFilepath() {
     $directory = 'core/misc';
     $original = $directory . '/' . $basename;
     $path = file_create_filename($basename, $directory);
-    $this->assertEqual($path, $original, format_string('New filepath %new equals %original.', array('%new' => $path, '%original' => $original)), 'File');
+    $this->assertEqual($path, $original, format_string('New filepath %new equals %original.', ['%new' => $path, '%original' => $original]), 'File');
 
     // Then we test against a file that already exists within that directory.
     $basename = 'druplicon.png';
     $original = $directory . '/' . $basename;
     $expected = $directory . '/druplicon_0.png';
     $path = file_create_filename($basename, $directory);
-    $this->assertEqual($path, $expected, format_string('Creating a new filepath from %original equals %new (expected %expected).', array('%new' => $path, '%original' => $original, '%expected' => $expected)), 'File');
+    $this->assertEqual($path, $expected, format_string('Creating a new filepath from %original equals %new (expected %expected).', ['%new' => $path, '%original' => $original, '%expected' => $expected]), 'File');
 
     // @TODO: Finally we copy a file into a directory several times, to ensure a properly iterating filename suffix.
   }
diff --git a/core/tests/Drupal/KernelTests/Core/File/FileTestBase.php b/core/tests/Drupal/KernelTests/Core/File/FileTestBase.php
index 548d1bcf9d72a44da6a9a76ae5d6ae6d732c2352..0b10d9288f27170b4f0e68a0e2f00797bfe7b6ff 100644
--- a/core/tests/Drupal/KernelTests/Core/File/FileTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/File/FileTestBase.php
@@ -16,7 +16,7 @@ abstract class FileTestBase extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * A stream wrapper scheme to register for the test.
@@ -70,9 +70,9 @@ protected function setUpFilesystem() {
 
     $this->setSetting('file_public_path', $public_file_directory);
 
-    $GLOBALS['config_directories'] = array(
+    $GLOBALS['config_directories'] = [
       CONFIG_SYNC_DIRECTORY => $this->siteDirectory . '/files/config/sync',
-    );
+    ];
   }
 
   /**
@@ -105,7 +105,7 @@ function assertFilePermissions($filepath, $expected_mode, $message = NULL) {
     }
 
     if (!isset($message)) {
-      $message = t('Expected file permission to be %expected, actually were %actual.', array('%actual' => decoct($actual_mode), '%expected' => decoct($expected_mode)));
+      $message = t('Expected file permission to be %expected, actually were %actual.', ['%actual' => decoct($actual_mode), '%expected' => decoct($expected_mode)]);
     }
     $this->assertEqual($actual_mode, $expected_mode, $message);
   }
@@ -141,7 +141,7 @@ function assertDirectoryPermissions($directory, $expected_mode, $message = NULL)
     }
 
     if (!isset($message)) {
-      $message = t('Expected directory permission to be %expected, actually were %actual.', array('%actual' => decoct($actual_mode), '%expected' => decoct($expected_mode)));
+      $message = t('Expected directory permission to be %expected, actually were %actual.', ['%actual' => decoct($actual_mode), '%expected' => decoct($expected_mode)]);
     }
     $this->assertEqual($actual_mode, $expected_mode, $message);
   }
diff --git a/core/tests/Drupal/KernelTests/Core/File/HtaccessTest.php b/core/tests/Drupal/KernelTests/Core/File/HtaccessTest.php
index 0ef5078029736a8e707a54dbe2684c6816790176..896627671d06b1f8b0d530d088466766a44c0c65 100644
--- a/core/tests/Drupal/KernelTests/Core/File/HtaccessTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/HtaccessTest.php
@@ -82,11 +82,11 @@ function testHtaccessSave() {
    */
   protected function assertFilePermissions($uri, $expected) {
     $actual = fileperms($uri) & 0777;
-    return $this->assertIdentical($actual, $expected, SafeMarkup::format('@uri file permissions @actual are identical to @expected.', array(
+    return $this->assertIdentical($actual, $expected, SafeMarkup::format('@uri file permissions @actual are identical to @expected.', [
       '@uri' => $uri,
       '@actual' => 0 . decoct($actual),
       '@expected' => 0 . decoct($expected),
-    )));
+    ]));
   }
 
 }
diff --git a/core/tests/Drupal/KernelTests/Core/File/MimeTypeTest.php b/core/tests/Drupal/KernelTests/Core/File/MimeTypeTest.php
index 9bfe681544c9825d8d4c8d26eab9135154c18ad7..05ac7c2557f1b2f0dde8b3dcc59c3fcd33ec5770 100644
--- a/core/tests/Drupal/KernelTests/Core/File/MimeTypeTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/MimeTypeTest.php
@@ -14,7 +14,7 @@ class MimeTypeTest extends FileTestBase {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * Test mapping of mimetypes from filenames.
@@ -22,7 +22,7 @@ class MimeTypeTest extends FileTestBase {
   public function testFileMimeTypeDetection() {
     $prefixes = ['public://', 'private://', 'temporary://', 'dummy-remote://'];
 
-    $test_case = array(
+    $test_case = [
       'test.jar' => 'application/java-archive',
       'test.jpeg' => 'image/jpeg',
       'test.JPEG' => 'image/jpeg',
@@ -37,7 +37,7 @@ public function testFileMimeTypeDetection() {
       'foo.file_test_2' => 'madeup/file_test_2',
       'foo.doc' => 'madeup/doc',
       'test.ogg' => 'audio/ogg',
-    );
+    ];
 
     $guesser = $this->container->get('file.mime_type.guesser');
     // Test using default mappings.
@@ -45,27 +45,27 @@ public function testFileMimeTypeDetection() {
       // Test stream [URI].
       foreach ($prefixes as $prefix) {
         $output = $guesser->guess($prefix . $input);
-        $this->assertIdentical($output, $expected, format_string('Mimetype for %input is %output (expected: %expected).', array('%input' => $prefix . $input, '%output' => $output, '%expected' => $expected)));
+        $this->assertIdentical($output, $expected, format_string('Mimetype for %input is %output (expected: %expected).', ['%input' => $prefix . $input, '%output' => $output, '%expected' => $expected]));
       }
 
       // Test normal path equivalent
       $output = $guesser->guess($input);
-      $this->assertIdentical($output, $expected, format_string('Mimetype (using default mappings) for %input is %output (expected: %expected).', array('%input' => $input, '%output' => $output, '%expected' => $expected)));
+      $this->assertIdentical($output, $expected, format_string('Mimetype (using default mappings) for %input is %output (expected: %expected).', ['%input' => $input, '%output' => $output, '%expected' => $expected]));
     }
 
     // Now test the extension gusser by passing in a custom mapping.
-    $mapping = array(
-      'mimetypes' => array(
+    $mapping = [
+      'mimetypes' => [
         0 => 'application/java-archive',
         1 => 'image/jpeg',
-      ),
-      'extensions' => array(
+      ],
+      'extensions' => [
          'jar' => 0,
          'jpg' => 1,
-      )
-    );
+      ]
+    ];
 
-    $test_case = array(
+    $test_case = [
       'test.jar' => 'application/java-archive',
       'test.jpeg' => 'application/octet-stream',
       'test.jpg' => 'image/jpeg',
@@ -79,13 +79,13 @@ public function testFileMimeTypeDetection() {
       'foo.file_test_2' => 'application/octet-stream',
       'foo.doc' => 'application/octet-stream',
       'test.ogg' => 'application/octet-stream',
-    );
+    ];
     $extension_guesser = $this->container->get('file.mime_type.guesser.extension');
     $extension_guesser->setMapping($mapping);
 
     foreach ($test_case as $input => $expected) {
       $output = $extension_guesser->guess($input);
-      $this->assertIdentical($output, $expected, format_string('Mimetype (using passed-in mappings) for %input is %output (expected: %expected).', array('%input' => $input, '%output' => $output, '%expected' => $expected)));
+      $this->assertIdentical($output, $expected, format_string('Mimetype (using passed-in mappings) for %input is %output (expected: %expected).', ['%input' => $input, '%output' => $output, '%expected' => $expected]));
     }
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/File/NameMungingTest.php b/core/tests/Drupal/KernelTests/Core/File/NameMungingTest.php
index 1fff41e2f9f5cffed87091f6d933144f32c6ff38..8e1506d535d79f08e5766e8899e820b3c782b2a7 100644
--- a/core/tests/Drupal/KernelTests/Core/File/NameMungingTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/NameMungingTest.php
@@ -39,8 +39,8 @@ function testMunging() {
     $this->config('system.file')->set('allow_insecure_uploads', 0)->save();
     $munged_name = file_munge_filename($this->name, '', TRUE);
     $messages = drupal_get_messages();
-    $this->assertTrue(in_array(strtr('For security reasons, your upload has been renamed to <em class="placeholder">%filename</em>.', array('%filename' => $munged_name)), $messages['status']), 'Alert properly set when a file is renamed.');
-    $this->assertNotEqual($munged_name, $this->name, format_string('The new filename (%munged) has been modified from the original (%original)', array('%munged' => $munged_name, '%original' => $this->name)));
+    $this->assertTrue(in_array(strtr('For security reasons, your upload has been renamed to <em class="placeholder">%filename</em>.', ['%filename' => $munged_name]), $messages['status']), 'Alert properly set when a file is renamed.');
+    $this->assertNotEqual($munged_name, $this->name, format_string('The new filename (%munged) has been modified from the original (%original)', ['%munged' => $munged_name, '%original' => $this->name]));
   }
 
   /**
@@ -59,7 +59,7 @@ function testMungeNullByte() {
   function testMungeIgnoreInsecure() {
     $this->config('system.file')->set('allow_insecure_uploads', 1)->save();
     $munged_name = file_munge_filename($this->name, '');
-    $this->assertIdentical($munged_name, $this->name, format_string('The original filename (%original) matches the munged filename (%munged) when insecure uploads are enabled.', array('%munged' => $munged_name, '%original' => $this->name)));
+    $this->assertIdentical($munged_name, $this->name, format_string('The original filename (%original) matches the munged filename (%munged) when insecure uploads are enabled.', ['%munged' => $munged_name, '%original' => $this->name]));
   }
 
   /**
@@ -69,10 +69,10 @@ function testMungeIgnoreWhitelisted() {
     // Declare our extension as whitelisted. The declared extensions should
     // be case insensitive so test using one with a different case.
     $munged_name = file_munge_filename($this->nameWithUcExt, $this->badExtension);
-    $this->assertIdentical($munged_name, $this->nameWithUcExt, format_string('The new filename (%munged) matches the original (%original) once the extension has been whitelisted.', array('%munged' => $munged_name, '%original' => $this->nameWithUcExt)));
+    $this->assertIdentical($munged_name, $this->nameWithUcExt, format_string('The new filename (%munged) matches the original (%original) once the extension has been whitelisted.', ['%munged' => $munged_name, '%original' => $this->nameWithUcExt]));
     // The allowed extensions should also be normalized.
     $munged_name = file_munge_filename($this->name, strtoupper($this->badExtension));
-    $this->assertIdentical($munged_name, $this->name, format_string('The new filename (%munged) matches the original (%original) also when the whitelisted extension is in uppercase.', array('%munged' => $munged_name, '%original' => $this->name)));
+    $this->assertIdentical($munged_name, $this->name, format_string('The new filename (%munged) matches the original (%original) also when the whitelisted extension is in uppercase.', ['%munged' => $munged_name, '%original' => $this->name]));
   }
 
   /**
@@ -81,7 +81,7 @@ function testMungeIgnoreWhitelisted() {
   function testUnMunge() {
     $munged_name = file_munge_filename($this->name, '', FALSE);
     $unmunged_name = file_unmunge_filename($munged_name);
-    $this->assertIdentical($unmunged_name, $this->name, format_string('The unmunged (%unmunged) filename matches the original (%original)', array('%unmunged' => $unmunged_name, '%original' => $this->name)));
+    $this->assertIdentical($unmunged_name, $this->name, format_string('The unmunged (%unmunged) filename matches the original (%original)', ['%unmunged' => $unmunged_name, '%original' => $this->name]));
   }
 
 }
diff --git a/core/tests/Drupal/KernelTests/Core/File/RemoteFileDirectoryTest.php b/core/tests/Drupal/KernelTests/Core/File/RemoteFileDirectoryTest.php
index 3265562b9b1873fdcfe9585f27d969c85226b93d..e41fb74e2e1049aef80286fae146cd02eb05763b 100644
--- a/core/tests/Drupal/KernelTests/Core/File/RemoteFileDirectoryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/RemoteFileDirectoryTest.php
@@ -14,7 +14,7 @@ class RemoteFileDirectoryTest extends DirectoryTest {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * A stream wrapper scheme to register for the test.
diff --git a/core/tests/Drupal/KernelTests/Core/File/RemoteFileScanDirectoryTest.php b/core/tests/Drupal/KernelTests/Core/File/RemoteFileScanDirectoryTest.php
index 3d872bce2c3a62d0167a0d947828699c0936e16f..e3c68a72f3363a6280821cb323025c8455922bf3 100644
--- a/core/tests/Drupal/KernelTests/Core/File/RemoteFileScanDirectoryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/RemoteFileScanDirectoryTest.php
@@ -14,7 +14,7 @@ class RemoteFileScanDirectoryTest extends ScanDirectoryTest {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * A stream wrapper scheme to register for the test.
diff --git a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedCopyTest.php b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedCopyTest.php
index 8be67268dca17012d615df6756a8370eb966be26..b13b92cba52e206bc00ca82a9b6c8a4ed4887991 100644
--- a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedCopyTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedCopyTest.php
@@ -14,7 +14,7 @@ class RemoteFileUnmanagedCopyTest extends UnmanagedCopyTest {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * A stream wrapper scheme to register for the test.
diff --git a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedDeleteRecursiveTest.php b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedDeleteRecursiveTest.php
index 06f0e1aa2f644ae2b63ab917362ad3a44226f1b4..6be98df4aa74e0395a266171978502b0cef43f8d 100644
--- a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedDeleteRecursiveTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedDeleteRecursiveTest.php
@@ -14,7 +14,7 @@ class RemoteFileUnmanagedDeleteRecursiveTest extends UnmanagedDeleteRecursiveTes
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * A stream wrapper scheme to register for the test.
diff --git a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedDeleteTest.php b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedDeleteTest.php
index fe0ad6edb17c5a21eb63e9267a9ef246f09c2733..f826d4dd294b16791f976383d175c8e32ba914da 100644
--- a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedDeleteTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedDeleteTest.php
@@ -14,7 +14,7 @@ class RemoteFileUnmanagedDeleteTest extends UnmanagedDeleteTest {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * A stream wrapper scheme to register for the test.
diff --git a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedMoveTest.php b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedMoveTest.php
index 47b66f237ae575196dc47ea22c1b0899379caf48..e41f87e694c64cbf282d31a474fb70045dd39a01 100644
--- a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedMoveTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedMoveTest.php
@@ -14,7 +14,7 @@ class RemoteFileUnmanagedMoveTest extends UnmanagedMoveTest {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * A stream wrapper scheme to register for the test.
diff --git a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedSaveDataTest.php b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedSaveDataTest.php
index 15b592958d2ca3059f1e53e4ce99171b368800fa..817da28288e9249c6f29a37aeb310316da2a7bc0 100644
--- a/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedSaveDataTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedSaveDataTest.php
@@ -14,7 +14,7 @@ class RemoteFileUnmanagedSaveDataTest extends UnmanagedSaveDataTest {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * A stream wrapper scheme to register for the test.
diff --git a/core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php b/core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php
index 8362c041ac7405673ec3cdfe27a9bb97707018f6..471c1aac7c6677b364b1aa70b9c5a1378f1c571b 100644
--- a/core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php
@@ -14,7 +14,7 @@ class ScanDirectoryTest extends FileTestBase {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * @var string
@@ -61,7 +61,7 @@ function testReturn() {
   function testOptionCallback() {
 
     // When nothing is matched nothing should be passed to the callback.
-    $all_files = file_scan_directory($this->path, '/^NONEXISTINGFILENAME/', array('callback' => 'file_test_file_scan_callback'));
+    $all_files = file_scan_directory($this->path, '/^NONEXISTINGFILENAME/', ['callback' => 'file_test_file_scan_callback']);
     $this->assertEqual(0, count($all_files), 'No files were found.');
     $results = file_test_file_scan_callback();
     file_test_file_scan_callback_reset();
@@ -69,7 +69,7 @@ function testOptionCallback() {
 
     // Grab a listing of all the JavaScript files and check that they're
     // passed to the callback.
-    $all_files = file_scan_directory($this->path, '/^javascript-/', array('callback' => 'file_test_file_scan_callback'));
+    $all_files = file_scan_directory($this->path, '/^javascript-/', ['callback' => 'file_test_file_scan_callback']);
     $this->assertEqual(2, count($all_files), 'Found two, expected javascript files.');
     $results = file_test_file_scan_callback();
     file_test_file_scan_callback_reset();
@@ -85,7 +85,7 @@ function testOptionNoMask() {
     $this->assertEqual(2, count($all_files), 'Found two, expected javascript files.');
 
     // Now use the nomask parameter to filter out the .script file.
-    $filtered_files = file_scan_directory($this->path, '/^javascript-/', array('nomask' => '/.script$/'));
+    $filtered_files = file_scan_directory($this->path, '/^javascript-/', ['nomask' => '/.script$/']);
     $this->assertEqual(1, count($filtered_files), 'Filtered correctly.');
   }
 
@@ -94,26 +94,26 @@ function testOptionNoMask() {
    */
   function testOptionKey() {
     // "filename", for the path starting with $dir.
-    $expected = array($this->path . '/javascript-1.txt', $this->path . '/javascript-2.script');
-    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', array('key' => 'filepath')));
+    $expected = [$this->path . '/javascript-1.txt', $this->path . '/javascript-2.script'];
+    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', ['key' => 'filepath']));
     sort($actual);
     $this->assertEqual($expected, $actual, 'Returned the correct values for the filename key.');
 
     // "basename", for the basename of the file.
-    $expected = array('javascript-1.txt', 'javascript-2.script');
-    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', array('key' => 'filename')));
+    $expected = ['javascript-1.txt', 'javascript-2.script'];
+    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', ['key' => 'filename']));
     sort($actual);
     $this->assertEqual($expected, $actual, 'Returned the correct values for the basename key.');
 
     // "name" for the name of the file without an extension.
-    $expected = array('javascript-1', 'javascript-2');
-    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', array('key' => 'name')));
+    $expected = ['javascript-1', 'javascript-2'];
+    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', ['key' => 'name']));
     sort($actual);
     $this->assertEqual($expected, $actual, 'Returned the correct values for the name key.');
 
     // Invalid option that should default back to "filename".
-    $expected = array($this->path . '/javascript-1.txt', $this->path . '/javascript-2.script');
-    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', array('key' => 'INVALID')));
+    $expected = [$this->path . '/javascript-1.txt', $this->path . '/javascript-2.script'];
+    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', ['key' => 'INVALID']));
     sort($actual);
     $this->assertEqual($expected, $actual, 'An invalid key defaulted back to the default.');
   }
@@ -122,10 +122,10 @@ function testOptionKey() {
    * Check that the recurse option descends into subdirectories.
    */
   function testOptionRecurse() {
-    $files = file_scan_directory($this->path . '/..', '/^javascript-/', array('recurse' => FALSE));
+    $files = file_scan_directory($this->path . '/..', '/^javascript-/', ['recurse' => FALSE]);
     $this->assertTrue(empty($files), "Without recursion couldn't find javascript files.");
 
-    $files = file_scan_directory($this->path . '/..', '/^javascript-/', array('recurse' => TRUE));
+    $files = file_scan_directory($this->path . '/..', '/^javascript-/', ['recurse' => TRUE]);
     $this->assertEqual(2, count($files), 'With recursion we found the expected javascript files.');
   }
 
@@ -135,10 +135,10 @@ function testOptionRecurse() {
    * directory.
    */
   function testOptionMinDepth() {
-    $files = file_scan_directory($this->path, '/^javascript-/', array('min_depth' => 0));
+    $files = file_scan_directory($this->path, '/^javascript-/', ['min_depth' => 0]);
     $this->assertEqual(2, count($files), 'No minimum-depth gets files in current directory.');
 
-    $files = file_scan_directory($this->path, '/^javascript-/', array('min_depth' => 1));
+    $files = file_scan_directory($this->path, '/^javascript-/', ['min_depth' => 1]);
     $this->assertTrue(empty($files), 'Minimum-depth of 1 successfully excludes files from current directory.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/File/StreamWrapperTest.php b/core/tests/Drupal/KernelTests/Core/File/StreamWrapperTest.php
index e9c86424ba3b9594c0dab9a91c8d546eb0034760..3db171da5c418b7126d5d829f0cf376b47fa4330 100644
--- a/core/tests/Drupal/KernelTests/Core/File/StreamWrapperTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/StreamWrapperTest.php
@@ -19,7 +19,7 @@ class StreamWrapperTest extends FileTestBase {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * A stream wrapper scheme to register for the test.
@@ -119,7 +119,7 @@ function testFileFunctions() {
     $this->assertEqual(-1 /*EOF*/, @stream_set_write_buffer($handle, 512), 'Unable to set write buffer using a local stream wrapper.');
 
     // This will test stream_cast().
-    $read = array($handle);
+    $read = [$handle];
     $write = NULL;
     $except = NULL;
     $this->assertEqual(1, stream_select($read, $write, $except, 0), 'Able to cast a stream via stream_select.');
diff --git a/core/tests/Drupal/KernelTests/Core/File/UrlRewritingTest.php b/core/tests/Drupal/KernelTests/Core/File/UrlRewritingTest.php
index 5494975af032e8e8e3201e0b98431fef6062784a..e2294cba5be2defdf05f7311dc78ebf65b944e6b 100644
--- a/core/tests/Drupal/KernelTests/Core/File/UrlRewritingTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/UrlRewritingTest.php
@@ -16,7 +16,7 @@ class UrlRewritingTest extends FileTestBase {
    *
    * @var array
    */
-  public static $modules = array('file_test');
+  public static $modules = ['file_test'];
 
   /**
    * Tests the rewriting of shipped file URLs by hook_file_url_alter().
diff --git a/core/tests/Drupal/KernelTests/Core/Form/FormCacheTest.php b/core/tests/Drupal/KernelTests/Core/Form/FormCacheTest.php
index fa86bee1443416b7c8257c747e3b6d2837e113ed..7cc1ff8fa09974613b01d91215c33ec0f4965f8e 100644
--- a/core/tests/Drupal/KernelTests/Core/Form/FormCacheTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Form/FormCacheTest.php
@@ -20,7 +20,7 @@ class FormCacheTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user');
+  public static $modules = ['system', 'user'];
 
   /**
    * @var string
@@ -39,12 +39,12 @@ class FormCacheTest extends KernelTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('system', array('key_value_expire'));
+    $this->installSchema('system', ['key_value_expire']);
 
     $this->formBuildId = $this->randomMachineName();
-    $this->form = array(
+    $this->form = [
       '#property' => $this->randomMachineName(),
-    );
+    ];
     $this->formState = new FormState();
     $this->formState->set('example', $this->randomMachineName());
   }
@@ -53,7 +53,7 @@ protected function setUp() {
    * Tests the form cache with a logged-in user.
    */
   function testCacheToken() {
-    \Drupal::currentUser()->setAccount(new UserSession(array('uid' => 1)));
+    \Drupal::currentUser()->setAccount(new UserSession(['uid' => 1]));
     \Drupal::formBuilder()->setCache($this->formBuildId, $this->form, $this->formState);
 
     $cached_form_state = new FormState();
diff --git a/core/tests/Drupal/KernelTests/Core/Form/FormDefaultHandlersTest.php b/core/tests/Drupal/KernelTests/Core/Form/FormDefaultHandlersTest.php
index 7f046e9d79dbf4e95ef8ba164fdb7c1dac7fe7ec..021c65fce91821846388a79bedb114ba2eedfb5e 100644
--- a/core/tests/Drupal/KernelTests/Core/Form/FormDefaultHandlersTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Form/FormDefaultHandlersTest.php
@@ -19,7 +19,7 @@ class FormDefaultHandlersTest extends KernelTestBase implements FormInterface {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * {@inheritdoc}
@@ -42,7 +42,7 @@ public function getFormId() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $form['#validate'][] = '::customValidateForm';
     $form['#submit'][] = '::customSubmitForm';
-    $form['submit'] = array('#type' => 'submit', '#value' => 'Save');
+    $form['submit'] = ['#type' => 'submit', '#value' => 'Save'];
     return $form;
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Form/TriggeringElementProgrammedTest.php b/core/tests/Drupal/KernelTests/Core/Form/TriggeringElementProgrammedTest.php
index c24d47e017a19bb0ee49252399077c7e478b3279..a51bc5d96623a4630fe1417c92c0da084683fc9d 100644
--- a/core/tests/Drupal/KernelTests/Core/Form/TriggeringElementProgrammedTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Form/TriggeringElementProgrammedTest.php
@@ -25,27 +25,27 @@ public function getFormId() {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['one'] = array(
+    $form['one'] = [
       '#type' => 'textfield',
       '#title' => 'One',
       '#required' => TRUE,
-    );
-    $form['two'] = array(
+    ];
+    $form['two'] = [
       '#type' => 'textfield',
       '#title' => 'Two',
       '#required' => TRUE,
-    );
-    $form['actions'] = array('#type' => 'actions');
+    ];
+    $form['actions'] = ['#type' => 'actions'];
     $user_input = $form_state->getUserInput();
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => 'Save',
-      '#limit_validation_errors' => array(
-        array($user_input['section']),
-      ),
+      '#limit_validation_errors' => [
+        [$user_input['section']],
+      ],
       // Required for #limit_validation_errors.
-      '#submit' => array(array($this, 'submitForm')),
-    );
+      '#submit' => [[$this, 'submitForm']],
+    ];
     return $form;
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/HttpKernel/StackKernelIntegrationTest.php b/core/tests/Drupal/KernelTests/Core/HttpKernel/StackKernelIntegrationTest.php
index 166ec244c80d523ed5e014e3314c03ef33366e23..29bbcff9a8479b42c25f3879461710f8039a4527 100644
--- a/core/tests/Drupal/KernelTests/Core/HttpKernel/StackKernelIntegrationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/HttpKernel/StackKernelIntegrationTest.php
@@ -19,7 +19,7 @@ class StackKernelIntegrationTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('httpkernel_test', 'system');
+  public static $modules = ['httpkernel_test', 'system'];
 
   /**
    * {@inheritdoc}
diff --git a/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
index fe36c3dc8a5bdbb5418346c094560eef3d047886..a3a57750a6d7b2162e9a59a088c157aa6fe1a155 100644
--- a/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
@@ -23,16 +23,16 @@ class ToolkitGdTest extends KernelTestBase {
   protected $imageFactory;
 
   // Colors that are used in testing.
-  protected $black       = array(0, 0, 0, 0);
-  protected $red         = array(255, 0, 0, 0);
-  protected $green       = array(0, 255, 0, 0);
-  protected $blue        = array(0, 0, 255, 0);
-  protected $yellow      = array(255, 255, 0, 0);
-  protected $white       = array(255, 255, 255, 0);
-  protected $transparent = array(0, 0, 0, 127);
+  protected $black       = [0, 0, 0, 0];
+  protected $red         = [255, 0, 0, 0];
+  protected $green       = [0, 255, 0, 0];
+  protected $blue        = [0, 0, 255, 0];
+  protected $yellow      = [255, 255, 0, 0];
+  protected $white       = [255, 255, 255, 0];
+  protected $transparent = [0, 0, 0, 127];
   // Used as rotate background colors.
-  protected $fuchsia            = array(255, 0, 255, 0);
-  protected $rotateTransparent = array(255, 255, 255, 127);
+  protected $fuchsia            = [255, 0, 255, 0];
+  protected $rotateTransparent = [255, 255, 255, 127];
 
   protected $width = 40;
   protected $height = 20;
@@ -42,7 +42,7 @@ class ToolkitGdTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'simpletest');
+  public static $modules = ['system', 'simpletest'];
 
   /**
    * {@inheritdoc}
@@ -57,9 +57,9 @@ protected function setUp() {
   protected function checkRequirements() {
     // GD2 support is available.
     if (!function_exists('imagegd2')) {
-      return array(
+      return [
         'Image manipulations for the GD toolkit cannot run because the GD toolkit is not available.',
-      );
+      ];
     }
     return parent::checkRequirements();
   }
@@ -91,7 +91,7 @@ function getPixelColor(ImageInterface $image, $x, $y) {
 
     $transparent_index = imagecolortransparent($toolkit->getResource());
     if ($color_index == $transparent_index) {
-      return array(0, 0, 0, 127);
+      return [0, 0, 0, 127];
     }
 
     return array_values(imagecolorsforindex($toolkit->getResource(), $color_index));
@@ -129,143 +129,143 @@ function testManipulations() {
 
     // Typically the corner colors will be unchanged. These colors are in the
     // order of top-left, top-right, bottom-right, bottom-left.
-    $default_corners = array($this->red, $this->green, $this->blue, $this->transparent);
+    $default_corners = [$this->red, $this->green, $this->blue, $this->transparent];
 
     // A list of files that will be tested.
-    $files = array(
+    $files = [
       'image-test.png',
       'image-test.gif',
       'image-test-no-transparency.gif',
       'image-test.jpg',
-    );
+    ];
 
     // Setup a list of tests to perform on each type.
-    $operations = array(
-      'resize' => array(
+    $operations = [
+      'resize' => [
         'function' => 'resize',
-        'arguments' => array('width' => 20, 'height' => 10),
+        'arguments' => ['width' => 20, 'height' => 10],
         'width' => 20,
         'height' => 10,
         'corners' => $default_corners,
-      ),
-      'scale_x' => array(
+      ],
+      'scale_x' => [
         'function' => 'scale',
-        'arguments' => array('width' => 20),
+        'arguments' => ['width' => 20],
         'width' => 20,
         'height' => 10,
         'corners' => $default_corners,
-      ),
-      'scale_y' => array(
+      ],
+      'scale_y' => [
         'function' => 'scale',
-        'arguments' => array('height' => 10),
+        'arguments' => ['height' => 10],
         'width' => 20,
         'height' => 10,
         'corners' => $default_corners,
-      ),
-      'upscale_x' => array(
+      ],
+      'upscale_x' => [
         'function' => 'scale',
-        'arguments' => array('width' => 80, 'upscale' => TRUE),
+        'arguments' => ['width' => 80, 'upscale' => TRUE],
         'width' => 80,
         'height' => 40,
         'corners' => $default_corners,
-      ),
-      'upscale_y' => array(
+      ],
+      'upscale_y' => [
         'function' => 'scale',
-        'arguments' => array('height' => 40, 'upscale' => TRUE),
+        'arguments' => ['height' => 40, 'upscale' => TRUE],
         'width' => 80,
         'height' => 40,
         'corners' => $default_corners,
-      ),
-      'crop' => array(
+      ],
+      'crop' => [
         'function' => 'crop',
-        'arguments' => array('x' => 12, 'y' => 4, 'width' => 16, 'height' => 12),
+        'arguments' => ['x' => 12, 'y' => 4, 'width' => 16, 'height' => 12],
         'width' => 16,
         'height' => 12,
         'corners' => array_fill(0, 4, $this->white),
-      ),
-      'scale_and_crop' => array(
+      ],
+      'scale_and_crop' => [
         'function' => 'scale_and_crop',
-        'arguments' => array('width' => 10, 'height' => 8),
+        'arguments' => ['width' => 10, 'height' => 8],
         'width' => 10,
         'height' => 8,
         'corners' => array_fill(0, 4, $this->black),
-      ),
-      'convert_jpg' => array(
+      ],
+      'convert_jpg' => [
         'function' => 'convert',
         'width' => 40,
         'height' => 20,
-        'arguments' => array('extension' => 'jpeg'),
+        'arguments' => ['extension' => 'jpeg'],
         'corners' => $default_corners,
-      ),
-      'convert_gif' => array(
+      ],
+      'convert_gif' => [
         'function' => 'convert',
         'width' => 40,
         'height' => 20,
-        'arguments' => array('extension' => 'gif'),
+        'arguments' => ['extension' => 'gif'],
         'corners' => $default_corners,
-      ),
-      'convert_png' => array(
+      ],
+      'convert_png' => [
         'function' => 'convert',
         'width' => 40,
         'height' => 20,
-        'arguments' => array('extension' => 'png'),
+        'arguments' => ['extension' => 'png'],
         'corners' => $default_corners,
-      ),
-    );
+      ],
+    ];
 
     // Systems using non-bundled GD2 don't have imagerotate. Test if available.
     if (function_exists('imagerotate')) {
-      $operations += array(
-        'rotate_5' => array(
+      $operations += [
+        'rotate_5' => [
           'function' => 'rotate',
-          'arguments' => array('degrees' => 5, 'background' => '#FF00FF'), // Fuchsia background.
+          'arguments' => ['degrees' => 5, 'background' => '#FF00FF'], // Fuchsia background.
           'width' => 41,
           'height' => 23,
           'corners' => array_fill(0, 4, $this->fuchsia),
-        ),
-        'rotate_90' => array(
+        ],
+        'rotate_90' => [
           'function' => 'rotate',
-          'arguments' => array('degrees' => 90, 'background' => '#FF00FF'), // Fuchsia background.
+          'arguments' => ['degrees' => 90, 'background' => '#FF00FF'], // Fuchsia background.
           'width' => 20,
           'height' => 40,
-          'corners' => array($this->transparent, $this->red, $this->green, $this->blue),
-        ),
-        'rotate_transparent_5' => array(
+          'corners' => [$this->transparent, $this->red, $this->green, $this->blue],
+        ],
+        'rotate_transparent_5' => [
           'function' => 'rotate',
-          'arguments' => array('degrees' => 5),
+          'arguments' => ['degrees' => 5],
           'width' => 41,
           'height' => 23,
           'corners' => array_fill(0, 4, $this->rotateTransparent),
-        ),
-        'rotate_transparent_90' => array(
+        ],
+        'rotate_transparent_90' => [
           'function' => 'rotate',
-          'arguments' => array('degrees' => 90),
+          'arguments' => ['degrees' => 90],
           'width' => 20,
           'height' => 40,
-          'corners' => array($this->transparent, $this->red, $this->green, $this->blue),
-        ),
-      );
+          'corners' => [$this->transparent, $this->red, $this->green, $this->blue],
+        ],
+      ];
     }
 
     // Systems using non-bundled GD2 don't have imagefilter. Test if available.
     if (function_exists('imagefilter')) {
-      $operations += array(
-        'desaturate' => array(
+      $operations += [
+        'desaturate' => [
           'function' => 'desaturate',
-          'arguments' => array(),
+          'arguments' => [],
           'height' => 20,
           'width' => 40,
           // Grayscale corners are a bit funky. Each of the corners are a shade of
           // gray. The values of these were determined simply by looking at the
           // final image to see what desaturated colors end up being.
-          'corners' => array(
-            array_fill(0, 3, 76) + array(3 => 0),
-            array_fill(0, 3, 149) + array(3 => 0),
-            array_fill(0, 3, 29) + array(3 => 0),
-            array_fill(0, 3, 225) + array(3 => 127)
-          ),
-        ),
-      );
+          'corners' => [
+            array_fill(0, 3, 76) + [3 => 0],
+            array_fill(0, 3, 149) + [3 => 0],
+            array_fill(0, 3, 29) + [3 => 0],
+            array_fill(0, 3, 225) + [3 => 127]
+          ],
+        ],
+      ];
     }
 
     // Prepare a directory for test file results.
@@ -278,14 +278,14 @@ function testManipulations() {
         $image = $this->imageFactory->get(drupal_get_path('module', 'simpletest') . '/files/' . $file);
         $toolkit = $image->getToolkit();
         if (!$image->isValid()) {
-          $this->fail(SafeMarkup::format('Could not load image %file.', array('%file' => $file)));
+          $this->fail(SafeMarkup::format('Could not load image %file.', ['%file' => $file]));
           continue 2;
         }
         $image_original_type = $image->getToolkit()->getType();
 
         // All images should be converted to truecolor when loaded.
         $image_truecolor = imageistruecolor($toolkit->getResource());
-        $this->assertTrue($image_truecolor, SafeMarkup::format('Image %file after load is a truecolor image.', array('%file' => $file)));
+        $this->assertTrue($image_truecolor, SafeMarkup::format('Image %file after load is a truecolor image.', ['%file' => $file]));
 
         // Store the original GD resource.
         $old_res = $toolkit->getResource();
@@ -317,8 +317,8 @@ function testManipulations() {
         $file_path = $directory . '/' . $op . image_type_to_extension($image->getToolkit()->getType());
         $image->save($file_path);
 
-        $this->assertTrue($correct_dimensions_real, SafeMarkup::format('Image %file after %action action has proper dimensions.', array('%file' => $file, '%action' => $op)));
-        $this->assertTrue($correct_dimensions_object, SafeMarkup::format('Image %file object after %action action is reporting the proper height and width values.', array('%file' => $file, '%action' => $op)));
+        $this->assertTrue($correct_dimensions_real, SafeMarkup::format('Image %file after %action action has proper dimensions.', ['%file' => $file, '%action' => $op]));
+        $this->assertTrue($correct_dimensions_object, SafeMarkup::format('Image %file object after %action action is reporting the proper height and width values.', ['%file' => $file, '%action' => $op]));
 
         // JPEG colors will always be messed up due to compression. So we skip
         // these tests if the original or the result is in jpeg format.
@@ -365,7 +365,7 @@ function testManipulations() {
             if ($image->getToolkit()->getType() == $image_original_type || $corner != $this->transparent) {
               $correct_colors = $this->colorsAreEqual($color, $corner);
               $this->assertTrue($correct_colors, SafeMarkup::format('Image %file object after %action action has the correct color placement at corner %corner.',
-                array('%file'   => $file, '%action' => $op, '%corner' => $key)));
+                ['%file'   => $file, '%action' => $op, '%corner' => $key]));
             }
           }
         }
@@ -377,30 +377,30 @@ function testManipulations() {
     }
 
     // Test creation of image from scratch, and saving to storage.
-    foreach (array(IMAGETYPE_PNG, IMAGETYPE_GIF, IMAGETYPE_JPEG) as $type) {
+    foreach ([IMAGETYPE_PNG, IMAGETYPE_GIF, IMAGETYPE_JPEG] as $type) {
       $image = $this->imageFactory->get();
       $image->createNew(50, 20, image_type_to_extension($type, FALSE), '#ffff00');
       $file = 'from_null' . image_type_to_extension($type);
       $file_path = $directory . '/' . $file ;
-      $this->assertEqual(50, $image->getWidth(), SafeMarkup::format('Image file %file has the correct width.', array('%file' => $file)));
-      $this->assertEqual(20, $image->getHeight(), SafeMarkup::format('Image file %file has the correct height.', array('%file' => $file)));
-      $this->assertEqual(image_type_to_mime_type($type), $image->getMimeType(), SafeMarkup::format('Image file %file has the correct MIME type.', array('%file' => $file)));
-      $this->assertTrue($image->save($file_path), SafeMarkup::format('Image %file created anew from a null image was saved.', array('%file' => $file)));
+      $this->assertEqual(50, $image->getWidth(), SafeMarkup::format('Image file %file has the correct width.', ['%file' => $file]));
+      $this->assertEqual(20, $image->getHeight(), SafeMarkup::format('Image file %file has the correct height.', ['%file' => $file]));
+      $this->assertEqual(image_type_to_mime_type($type), $image->getMimeType(), SafeMarkup::format('Image file %file has the correct MIME type.', ['%file' => $file]));
+      $this->assertTrue($image->save($file_path), SafeMarkup::format('Image %file created anew from a null image was saved.', ['%file' => $file]));
 
       // Reload saved image.
       $image_reloaded = $this->imageFactory->get($file_path);
       if (!$image_reloaded->isValid()) {
-        $this->fail(SafeMarkup::format('Could not load image %file.', array('%file' => $file)));
+        $this->fail(SafeMarkup::format('Could not load image %file.', ['%file' => $file]));
         continue;
       }
-      $this->assertEqual(50, $image_reloaded->getWidth(), SafeMarkup::format('Image file %file has the correct width.', array('%file' => $file)));
-      $this->assertEqual(20, $image_reloaded->getHeight(), SafeMarkup::format('Image file %file has the correct height.', array('%file' => $file)));
-      $this->assertEqual(image_type_to_mime_type($type), $image_reloaded->getMimeType(), SafeMarkup::format('Image file %file has the correct MIME type.', array('%file' => $file)));
+      $this->assertEqual(50, $image_reloaded->getWidth(), SafeMarkup::format('Image file %file has the correct width.', ['%file' => $file]));
+      $this->assertEqual(20, $image_reloaded->getHeight(), SafeMarkup::format('Image file %file has the correct height.', ['%file' => $file]));
+      $this->assertEqual(image_type_to_mime_type($type), $image_reloaded->getMimeType(), SafeMarkup::format('Image file %file has the correct MIME type.', ['%file' => $file]));
       if ($image_reloaded->getToolkit()->getType() == IMAGETYPE_GIF) {
-        $this->assertEqual('#ffff00', $image_reloaded->getToolkit()->getTransparentColor(), SafeMarkup::format('Image file %file has the correct transparent color channel set.', array('%file' => $file)));
+        $this->assertEqual('#ffff00', $image_reloaded->getToolkit()->getTransparentColor(), SafeMarkup::format('Image file %file has the correct transparent color channel set.', ['%file' => $file]));
       }
       else {
-        $this->assertEqual(NULL, $image_reloaded->getToolkit()->getTransparentColor(), SafeMarkup::format('Image file %file has no color channel set.', array('%file' => $file)));
+        $this->assertEqual(NULL, $image_reloaded->getToolkit()->getTransparentColor(), SafeMarkup::format('Image file %file has no color channel set.', ['%file' => $file]));
       }
     }
 
@@ -496,12 +496,12 @@ function testGifTransparentImages() {
     $toolkit = $image->getToolkit();
 
     if (!$image->isValid()) {
-      $this->fail(SafeMarkup::format('Could not load image %file.', array('%file' => $file)));
+      $this->fail(SafeMarkup::format('Could not load image %file.', ['%file' => $file]));
     }
     else {
       // All images should be converted to truecolor when loaded.
       $image_truecolor = imageistruecolor($toolkit->getResource());
-      $this->assertTrue($image_truecolor, SafeMarkup::format('Image %file after load is a truecolor image.', array('%file' => $file)));
+      $this->assertTrue($image_truecolor, SafeMarkup::format('Image %file after load is a truecolor image.', ['%file' => $file]));
     }
   }
 
@@ -519,11 +519,11 @@ function testMissingOperation() {
     // Load up a fresh image.
     $image = $this->imageFactory->get(drupal_get_path('module', 'simpletest') . '/files/' . $file);
     if (!$image->isValid()) {
-      $this->fail(SafeMarkup::format('Could not load image %file.', array('%file' => $file)));
+      $this->fail(SafeMarkup::format('Could not load image %file.', ['%file' => $file]));
     }
 
     // Try perform a missing toolkit operation.
-    $this->assertFalse($image->apply('missing_op', array()), 'Calling a missing image toolkit operation plugin fails.');
+    $this->assertFalse($image->apply('missing_op', []), 'Calling a missing image toolkit operation plugin fails.');
   }
 
 }
diff --git a/core/tests/Drupal/KernelTests/Core/Installer/InstallerLanguageTest.php b/core/tests/Drupal/KernelTests/Core/Installer/InstallerLanguageTest.php
index 060ee46f5efce6fbe33245e4a1dc3b2755f7c5bc..d619d38552d509a44a36f7a2f82b46415240c685 100644
--- a/core/tests/Drupal/KernelTests/Core/Installer/InstallerLanguageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Installer/InstallerLanguageTest.php
@@ -18,21 +18,21 @@ class InstallerLanguageTest extends KernelTestBase {
   function testInstallerTranslationFiles() {
     // Different translation files would be found depending on which language
     // we are looking for.
-    $expected_translation_files = array(
-      NULL => array('drupal-8.0.0-beta2.hu.po', 'drupal-8.0.0.de.po'),
-      'de' => array('drupal-8.0.0.de.po'),
-      'hu' => array('drupal-8.0.0-beta2.hu.po'),
-      'it' => array(),
-    );
+    $expected_translation_files = [
+      NULL => ['drupal-8.0.0-beta2.hu.po', 'drupal-8.0.0.de.po'],
+      'de' => ['drupal-8.0.0.de.po'],
+      'hu' => ['drupal-8.0.0-beta2.hu.po'],
+      'it' => [],
+    ];
 
     // Hardcode the simpletest module location as we don't yet know where it is.
     // @todo Remove as part of https://www.drupal.org/node/2186491
     $file_translation = new FileTranslation('core/modules/simpletest/files/translations');
     foreach ($expected_translation_files as $langcode => $files_expected) {
       $files_found = $file_translation->findTranslationFiles($langcode);
-      $this->assertTrue(count($files_found) == count($files_expected), format_string('@count installer languages found.', array('@count' => count($files_expected))));
+      $this->assertTrue(count($files_found) == count($files_expected), format_string('@count installer languages found.', ['@count' => count($files_expected)]));
       foreach ($files_found as $file) {
-        $this->assertTrue(in_array($file->filename, $files_expected), format_string('@file found.', array('@file' => $file->filename)));
+        $this->assertTrue(in_array($file->filename, $files_expected), format_string('@file found.', ['@file' => $file->filename]));
       }
     }
   }
diff --git a/core/tests/Drupal/KernelTests/Core/Installer/InstallerRedirectTraitTest.php b/core/tests/Drupal/KernelTests/Core/Installer/InstallerRedirectTraitTest.php
index fea860973bc1bfbac116743c6e62fa3e0ecbc901..0aca302db3a086b0d4b3882a81ca83ecd7e6ebc3 100644
--- a/core/tests/Drupal/KernelTests/Core/Installer/InstallerRedirectTraitTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Installer/InstallerRedirectTraitTest.php
@@ -29,7 +29,7 @@ class InstallerRedirectTraitTest extends KernelTestBase {
    *   - Whether or not there exists a sessions table in the database.
    */
   public function providerShouldRedirectToInstaller() {
-    return array(
+    return [
       [TRUE, DatabaseNotFoundException::class, FALSE, FALSE],
       [TRUE, DatabaseNotFoundException::class, TRUE, FALSE],
       [TRUE, DatabaseNotFoundException::class, FALSE, TRUE],
@@ -59,7 +59,7 @@ public function providerShouldRedirectToInstaller() {
       [FALSE, \Exception::class, FALSE, TRUE],
       [FALSE, \Exception::class, TRUE, TRUE],
       [FALSE, \Exception::class, TRUE, TRUE, FALSE],
-    );
+    ];
   }
 
   /**
@@ -73,7 +73,7 @@ function testShouldRedirectToInstaller($expected, $exception, $connection, $conn
     catch (\Exception $e) {
       // Mock the trait.
       $trait = $this->getMockBuilder(InstallerRedirectTrait::class)
-        ->setMethods(array('isCli'))
+        ->setMethods(['isCli'])
         ->getMockForTrait();
 
       // Make sure that the method thinks we are not using the cli.
@@ -95,14 +95,14 @@ function testShouldRedirectToInstaller($expected, $exception, $connection, $conn
         // Mock the database connection.
         $connection = $this->getMockBuilder(Connection::class)
           ->disableOriginalConstructor()
-          ->setMethods(array('schema'))
+          ->setMethods(['schema'])
           ->getMockForAbstractClass();
 
         if ($connection_info) {
           // Mock the database schema class.
           $schema = $this->getMockBuilder(Schema::class)
             ->disableOriginalConstructor()
-            ->setMethods(array('tableExists'))
+            ->setMethods(['tableExists'])
             ->getMockForAbstractClass();
 
           $schema->expects($this->any())
diff --git a/core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageExpirableTest.php b/core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageExpirableTest.php
index 16315010654d3bbccdb815b49987ef076f71c2fe..2d543cbf01f14aa8756a06e5cae9d6ffa01adf82 100644
--- a/core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageExpirableTest.php
+++ b/core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageExpirableTest.php
@@ -17,12 +17,12 @@ class DatabaseStorageExpirableTest extends StorageTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   protected function setUp() {
     parent::setUp();
     $this->factory = 'keyvalue.expirable';
-    $this->installSchema('system', array('key_value_expire'));
+    $this->installSchema('system', ['key_value_expire']);
   }
 
   /**
@@ -60,12 +60,12 @@ public function testCRUDWithExpiration() {
     $this->assertIdenticalObject($this->objects[2], $stores[1]->get('foo'));
 
     // Verify that multiple items can be stored with setMultipleWithExpire().
-    $values = array(
+    $values = [
       'foo' => $this->objects[3],
       'bar' => $this->objects[4],
-    );
+    ];
     $stores[0]->setMultipleWithExpire($values, rand(500, 100000));
-    $result = $stores[0]->getMultiple(array('foo', 'bar'));
+    $result = $stores[0]->getMultiple(['foo', 'bar']);
     foreach ($values as $j => $value) {
       $this->assertIdenticalObject($value, $result[$j]);
     }
@@ -85,13 +85,13 @@ public function testCRUDWithExpiration() {
     }
     // Verify that all items in the other collection are different.
     $result = $stores[1]->getAll();
-    $this->assertEqual($result, array('foo' => $this->objects[5]));
+    $this->assertEqual($result, ['foo' => $this->objects[5]]);
 
     // Verify that multiple items can be deleted.
     $stores[0]->deleteMultiple(array_keys($values));
     $this->assertFalse($stores[0]->get('foo'));
     $this->assertFalse($stores[0]->get('bar'));
-    $this->assertFalse($stores[0]->getMultiple(array('foo', 'bar')));
+    $this->assertFalse($stores[0]->getMultiple(['foo', 'bar']));
     // Verify that the item in the other collection still exists.
     $this->assertIdenticalObject($this->objects[5], $stores[1]->get('foo'));
 
@@ -132,16 +132,16 @@ public function testExpiration() {
     $this->assertFalse($stores[0]->get('yesterday'));
     $this->assertTrue($stores[0]->has('troubles'));
     $this->assertIdentical($stores[0]->get('troubles'), 'here to stay');
-    $this->assertIdentical(count($stores[0]->getMultiple(array('yesterday', 'troubles'))), 1);
+    $this->assertIdentical(count($stores[0]->getMultiple(['yesterday', 'troubles'])), 1);
 
     // Store items set to expire in the past in various ways.
     $stores[0]->setWithExpire($this->randomMachineName(), $this->objects[0], -7 * $day);
     $stores[0]->setWithExpireIfNotExists($this->randomMachineName(), $this->objects[1], -5 * $day);
     $stores[0]->setMultipleWithExpire(
-      array(
+      [
         $this->randomMachineName() => $this->objects[2],
         $this->randomMachineName() => $this->objects[3],
-      ),
+      ],
       -3 * $day
     );
     $stores[0]->setWithExpireIfNotExists('yesterday', "you'd forgiven me", -1 * $day);
@@ -150,7 +150,7 @@ public function testExpiration() {
     // Ensure only non-expired items are retrieved.
     $all = $stores[0]->getAll();
     $this->assertIdentical(count($all), 2);
-    foreach (array('troubles', 'still') as $key) {
+    foreach (['troubles', 'still'] as $key) {
       $this->assertTrue(!empty($all[$key]));
     }
   }
diff --git a/core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageTest.php b/core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageTest.php
index 676ab1084dfd0fba717bb777cc7e627dbd723564..5852da143f1900ba6f4b3fd4d5da44403bd7de55 100644
--- a/core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/KeyValueStore/DatabaseStorageTest.php
@@ -17,11 +17,11 @@ class DatabaseStorageTest extends StorageTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('system', array('key_value'));
+    $this->installSchema('system', ['key_value']);
   }
 
   /**
diff --git a/core/tests/Drupal/KernelTests/Core/KeyValueStore/GarbageCollectionTest.php b/core/tests/Drupal/KernelTests/Core/KeyValueStore/GarbageCollectionTest.php
index 4dc9b47f51ed5ef63c0c4e0e7711fa32d213fcec..e0badd88d14b0a57f0e02df13cebde946171108d 100644
--- a/core/tests/Drupal/KernelTests/Core/KeyValueStore/GarbageCollectionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/KeyValueStore/GarbageCollectionTest.php
@@ -19,13 +19,13 @@ class GarbageCollectionTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   protected function setUp() {
     parent::setUp();
 
     // These additional tables are necessary due to the call to system_cron().
-    $this->installSchema('system', array('key_value_expire'));
+    $this->installSchema('system', ['key_value_expire']);
   }
 
   /**
@@ -44,13 +44,13 @@ public function testGarbageCollection() {
     // Manually expire the data.
     for ($i = 0; $i <= 3; $i++) {
       db_merge('key_value_expire')
-        ->keys(array(
+        ->keys([
             'name' => 'key_' . $i,
             'collection' => $collection,
-          ))
-        ->fields(array(
+          ])
+        ->fields([
             'expire' => REQUEST_TIME - 1,
-          ))
+          ])
         ->execute();
     }
 
@@ -62,9 +62,9 @@ public function testGarbageCollection() {
     // Query the database and confirm that the stale records were deleted.
     $result = db_query(
       'SELECT name, value FROM {key_value_expire} WHERE collection = :collection',
-      array(
+      [
         ':collection' => $collection,
-      ))->fetchAll();
+      ])->fetchAll();
     $this->assertIdentical(count($result), 1, 'Only one item remains after garbage collection');
 
   }
diff --git a/core/tests/Drupal/KernelTests/Core/KeyValueStore/KeyValueContentEntityStorageTest.php b/core/tests/Drupal/KernelTests/Core/KeyValueStore/KeyValueContentEntityStorageTest.php
index 068216b3436a05fb6e2105bde3deec4e20fe4e05..4fc9c7a719ef17fe03d99747bee55c9a572db77f 100644
--- a/core/tests/Drupal/KernelTests/Core/KeyValueStore/KeyValueContentEntityStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/KeyValueStore/KeyValueContentEntityStorageTest.php
@@ -19,7 +19,7 @@ class KeyValueContentEntityStorageTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'entity_test', 'keyvalue_test');
+  public static $modules = ['user', 'entity_test', 'keyvalue_test'];
 
   /**
    * {@inheritdoc}
@@ -69,9 +69,9 @@ function testCRUD() {
     }
 
     // Verify that an entity with an empty ID string is considered empty, too.
-    $empty_id = EntityTestLabel::create(array(
+    $empty_id = EntityTestLabel::create([
       'id' => '',
-    ));
+    ]);
     $this->assertIdentical($empty_id->isNew(), TRUE);
     try {
       $empty_id->save();
@@ -82,10 +82,10 @@ function testCRUD() {
     }
 
     // Verify properties on a newly created entity.
-    $entity_test = EntityTestLabel::create($expected = array(
+    $entity_test = EntityTestLabel::create($expected = [
       'id' => $this->randomMachineName(),
       'name' => $this->randomString(),
-    ));
+    ]);
     $this->assertIdentical($entity_test->id->value, $expected['id']);
     $this->assertTrue($entity_test->uuid->value);
     $this->assertNotEqual($entity_test->uuid->value, $empty->uuid->value);
@@ -125,9 +125,9 @@ function testCRUD() {
 
     // Ensure that creating an entity with the same id as an existing one is not
     // possible.
-    $same_id = EntityTestLabel::create(array(
+    $same_id = EntityTestLabel::create([
       'id' => $entity_test->id(),
-    ));
+    ]);
     $this->assertIdentical($same_id->isNew(), TRUE);
     try {
       $same_id->save();
@@ -138,7 +138,7 @@ function testCRUD() {
     }
 
     // Verify that renaming the ID returns correct status and properties.
-    $ids = array($expected['id'], 'second_' . $this->randomMachineName(4), 'third_' . $this->randomMachineName(4));
+    $ids = [$expected['id'], 'second_' . $this->randomMachineName(4), 'third_' . $this->randomMachineName(4)];
     for ($i = 1; $i < 3; $i++) {
       $old_id = $ids[$i - 1];
       $new_id = $ids[$i];
diff --git a/core/tests/Drupal/KernelTests/Core/KeyValueStore/StorageTestBase.php b/core/tests/Drupal/KernelTests/Core/KeyValueStore/StorageTestBase.php
index 48e047dfcc10aa916fc34057d5f82645cfa2019a..76512342686d410947282d744a80f1e800c99bec 100644
--- a/core/tests/Drupal/KernelTests/Core/KeyValueStore/StorageTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/KeyValueStore/StorageTestBase.php
@@ -14,14 +14,14 @@ abstract class StorageTestBase extends KernelTestBase {
    *
    * @var array
    */
-  protected $objects = array();
+  protected $objects = [];
 
   /**
    * An array of data collection labels.
    *
    * @var array
    */
-  protected $collections = array();
+  protected $collections = [];
 
   /**
    * Whether we are using an expirable key/value store.
@@ -34,7 +34,7 @@ protected function setUp() {
     parent::setUp();
 
     // Define two data collections,
-    $this->collections = array(0 => 'zero', 1 => 'one');
+    $this->collections = [0 => 'zero', 1 => 'one'];
 
     // Create several objects for testing.
     for ($i = 0; $i <= 5; $i++) {
@@ -82,14 +82,14 @@ public function testCRUD() {
     $this->assertFalse($stores[1]->get('foo'));
 
     // Verify that multiple items can be stored.
-    $values = array(
+    $values = [
       'foo' => $this->objects[3],
       'bar' => $this->objects[4],
-    );
+    ];
     $stores[0]->setMultiple($values);
 
     // Verify that multiple items can be retrieved.
-    $result = $stores[0]->getMultiple(array('foo', 'bar'));
+    $result = $stores[0]->getMultiple(['foo', 'bar']);
     foreach ($values as $j => $value) {
       $this->assertIdenticalObject($value, $result[$j]);
     }
@@ -109,15 +109,15 @@ public function testCRUD() {
     }
     // Verify that all items in the other collection are different.
     $result = $stores[1]->getAll();
-    $this->assertEqual($result, array('foo' => $this->objects[5]));
+    $this->assertEqual($result, ['foo' => $this->objects[5]]);
 
     // Verify that multiple items can be deleted.
     $stores[0]->deleteMultiple(array_keys($values));
     $this->assertFalse($stores[0]->get('foo'));
     $this->assertFalse($stores[0]->get('bar'));
-    $this->assertFalse($stores[0]->getMultiple(array('foo', 'bar')));
+    $this->assertFalse($stores[0]->getMultiple(['foo', 'bar']));
     // Verify that deleting no items does not cause an error.
-    $stores[0]->deleteMultiple(array());
+    $stores[0]->deleteMultiple([]);
     // Verify that the item in the other collection still exists.
     $this->assertIdenticalObject($this->objects[5], $stores[1]->get('foo'));
 
@@ -146,7 +146,7 @@ public function testNonExistingKeys() {
 
     // Verify that a non-existing key is not returned when getting multiple keys.
     $stores[0]->set('bar', 'baz');
-    $values = $stores[0]->getMultiple(array('foo', 'bar'));
+    $values = $stores[0]->getMultiple(['foo', 'bar']);
     $this->assertFalse(isset($values['foo']), "Key 'foo' not found.");
     $this->assertIdentical($values['bar'], 'baz');
   }
@@ -204,7 +204,7 @@ public function testRename() {
    * @see \Drupal\Core\KeyValueStore\DatabaseStorageExpirable::garbageCollection()
    */
   protected function createStorage() {
-    $stores = array();
+    $stores = [];
     foreach ($this->collections as $i => $collection) {
       $stores[$i] = $this->container->get($this->factory)->get($collection);
     }
diff --git a/core/tests/Drupal/KernelTests/Core/Menu/MenuLinkDefaultIntegrationTest.php b/core/tests/Drupal/KernelTests/Core/Menu/MenuLinkDefaultIntegrationTest.php
index b9998873769a332dbfd11fe9a16e3d309639ee90..d0da9130a69e12b11319e245432d1bd5d30d4a6a 100644
--- a/core/tests/Drupal/KernelTests/Core/Menu/MenuLinkDefaultIntegrationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Menu/MenuLinkDefaultIntegrationTest.php
@@ -17,9 +17,9 @@ class MenuLinkDefaultIntegrationTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'menu_test',
-  );
+  ];
 
   /**
    * Tests moving a static menu link without a specified menu to the root.
@@ -39,7 +39,7 @@ public function testMoveToRoot() {
     $this->assertEqual($tree['menu_test.parent']->subtree['menu_test.child']->link->getPluginId(), 'menu_test.child');
 
     // Ensure that the menu name is not forgotten.
-    $menu_link_manager->updateDefinition('menu_test.child', array('parent' => ''));
+    $menu_link_manager->updateDefinition('menu_test.child', ['parent' => '']);
     $menu_link = $menu_link_manager->getDefinition('menu_test.child');
 
     $this->assertEqual($menu_link['parent'], '');
diff --git a/core/tests/Drupal/KernelTests/Core/Menu/MenuLinkTreeTest.php b/core/tests/Drupal/KernelTests/Core/Menu/MenuLinkTreeTest.php
index 1efb14bc02ba9413c2cc865c3602cf3d532720fc..033451ac000a60b96fdd0759eed369cb8d6eb552 100644
--- a/core/tests/Drupal/KernelTests/Core/Menu/MenuLinkTreeTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Menu/MenuLinkTreeTest.php
@@ -35,13 +35,13 @@ class MenuLinkTreeTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array(
+  public static $modules = [
     'system',
     'menu_test',
     'menu_link_content',
     'field',
     'link',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -59,12 +59,12 @@ protected function setUp() {
    * Tests deleting all the links in a menu.
    */
   public function testDeleteLinksInMenu() {
-    \Drupal::entityManager()->getStorage('menu')->create(array('id' => 'menu1'))->save();
-    \Drupal::entityManager()->getStorage('menu')->create(array('id' => 'menu2'))->save();
+    \Drupal::entityManager()->getStorage('menu')->create(['id' => 'menu1'])->save();
+    \Drupal::entityManager()->getStorage('menu')->create(['id' => 'menu2'])->save();
 
-    \Drupal::entityManager()->getStorage('menu_link_content')->create(array('link' => ['uri' => 'internal:/menu_name_test'], 'menu_name' => 'menu1', 'bundle' => 'menu_link_content'))->save();
-    \Drupal::entityManager()->getStorage('menu_link_content')->create(array('link' => ['uri' => 'internal:/menu_name_test'], 'menu_name' => 'menu1', 'bundle' => 'menu_link_content'))->save();
-    \Drupal::entityManager()->getStorage('menu_link_content')->create(array('link' => ['uri' => 'internal:/menu_name_test'], 'menu_name' => 'menu2', 'bundle' => 'menu_link_content'))->save();
+    \Drupal::entityManager()->getStorage('menu_link_content')->create(['link' => ['uri' => 'internal:/menu_name_test'], 'menu_name' => 'menu1', 'bundle' => 'menu_link_content'])->save();
+    \Drupal::entityManager()->getStorage('menu_link_content')->create(['link' => ['uri' => 'internal:/menu_name_test'], 'menu_name' => 'menu1', 'bundle' => 'menu_link_content'])->save();
+    \Drupal::entityManager()->getStorage('menu_link_content')->create(['link' => ['uri' => 'internal:/menu_name_test'], 'menu_name' => 'menu2', 'bundle' => 'menu_link_content'])->save();
 
     $output = $this->linkTree->load('menu1', new MenuTreeParameters());
     $this->assertEqual(count($output), 2);
@@ -95,16 +95,16 @@ public function testCreateLinksInMenu() {
     // - 8
     // With link 6 being the only external link.
 
-    $links = array(
-      1 => MenuLinkMock::create(array('id' => 'test.example1', 'route_name' => 'example1', 'title' => 'foo', 'parent' => '')),
-      2 => MenuLinkMock::create(array('id' => 'test.example2', 'route_name' => 'example2', 'title' => 'bar', 'parent' => 'test.example1', 'route_parameters' => array('foo' => 'bar'))),
-      3 => MenuLinkMock::create(array('id' => 'test.example3', 'route_name' => 'example3', 'title' => 'baz', 'parent' => 'test.example2', 'route_parameters' => array('baz' => 'qux'))),
-      4 => MenuLinkMock::create(array('id' => 'test.example4', 'route_name' => 'example4', 'title' => 'qux', 'parent' => 'test.example3')),
-      5 => MenuLinkMock::create(array('id' => 'test.example5', 'route_name' => 'example5', 'title' => 'foofoo', 'parent' => '')),
-      6 => MenuLinkMock::create(array('id' => 'test.example6', 'route_name' => '', 'url' => 'https://www.drupal.org/', 'title' => 'barbar', 'parent' => '')),
-      7 => MenuLinkMock::create(array('id' => 'test.example7', 'route_name' => 'example7', 'title' => 'bazbaz', 'parent' => '')),
-      8 => MenuLinkMock::create(array('id' => 'test.example8', 'route_name' => 'example8', 'title' => 'quxqux', 'parent' => '')),
-    );
+    $links = [
+      1 => MenuLinkMock::create(['id' => 'test.example1', 'route_name' => 'example1', 'title' => 'foo', 'parent' => '']),
+      2 => MenuLinkMock::create(['id' => 'test.example2', 'route_name' => 'example2', 'title' => 'bar', 'parent' => 'test.example1', 'route_parameters' => ['foo' => 'bar']]),
+      3 => MenuLinkMock::create(['id' => 'test.example3', 'route_name' => 'example3', 'title' => 'baz', 'parent' => 'test.example2', 'route_parameters' => ['baz' => 'qux']]),
+      4 => MenuLinkMock::create(['id' => 'test.example4', 'route_name' => 'example4', 'title' => 'qux', 'parent' => 'test.example3']),
+      5 => MenuLinkMock::create(['id' => 'test.example5', 'route_name' => 'example5', 'title' => 'foofoo', 'parent' => '']),
+      6 => MenuLinkMock::create(['id' => 'test.example6', 'route_name' => '', 'url' => 'https://www.drupal.org/', 'title' => 'barbar', 'parent' => '']),
+      7 => MenuLinkMock::create(['id' => 'test.example7', 'route_name' => 'example7', 'title' => 'bazbaz', 'parent' => '']),
+      8 => MenuLinkMock::create(['id' => 'test.example8', 'route_name' => 'example8', 'title' => 'quxqux', 'parent' => '']),
+    ];
     foreach ($links as $instance) {
       $this->menuLinkManager->addDefinition($instance->getPluginId(), $instance->getPluginDefinition());
     }
diff --git a/core/tests/Drupal/KernelTests/Core/Menu/MenuTreeStorageTest.php b/core/tests/Drupal/KernelTests/Core/Menu/MenuTreeStorageTest.php
index cb1d74d960bc239a316f33a77a649bda71c87638..ad3f04d0ab496d831ad36c8548f1a7b33fe3e170 100644
--- a/core/tests/Drupal/KernelTests/Core/Menu/MenuTreeStorageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Menu/MenuTreeStorageTest.php
@@ -77,16 +77,16 @@ public function testSimpleHierarchy() {
     // -- test2
     // --- test3
     $this->addMenuLink('test1', '');
-    $this->assertMenuLink('test1', array('has_children' => 0, 'depth' => 1));
+    $this->assertMenuLink('test1', ['has_children' => 0, 'depth' => 1]);
 
     $this->addMenuLink('test2', 'test1');
-    $this->assertMenuLink('test1', array('has_children' => 1, 'depth' => 1), array(), array('test2'));
-    $this->assertMenuLink('test2', array('has_children' => 0, 'depth' => 2), array('test1'));
+    $this->assertMenuLink('test1', ['has_children' => 1, 'depth' => 1], [], ['test2']);
+    $this->assertMenuLink('test2', ['has_children' => 0, 'depth' => 2], ['test1']);
 
     $this->addMenuLink('test3', 'test2');
-    $this->assertMenuLink('test1', array('has_children' => 1, 'depth' => 1), array(), array('test2', 'test3'));
-    $this->assertMenuLink('test2', array('has_children' => 1, 'depth' => 2), array('test1'), array('test3'));
-    $this->assertMenuLink('test3', array('has_children' => 0, 'depth' => 3), array('test2', 'test1'));
+    $this->assertMenuLink('test1', ['has_children' => 1, 'depth' => 1], [], ['test2', 'test3']);
+    $this->assertMenuLink('test2', ['has_children' => 1, 'depth' => 2], ['test1'], ['test3']);
+    $this->assertMenuLink('test3', ['has_children' => 0, 'depth' => 3], ['test2', 'test1']);
   }
 
   /**
@@ -109,11 +109,11 @@ public function testMenuLinkMoving() {
     $this->addMenuLink('test5', 'test4');
     $this->addMenuLink('test6', 'test5');
 
-    $this->assertMenuLink('test1', array('has_children' => 1, 'depth' => 1), array(), array('test2', 'test3'));
-    $this->assertMenuLink('test2', array('has_children' => 1, 'depth' => 2), array('test1'), array('test3'));
-    $this->assertMenuLink('test4', array('has_children' => 1, 'depth' => 1), array(), array('test5', 'test6'));
-    $this->assertMenuLink('test5', array('has_children' => 1, 'depth' => 2), array('test4'), array('test6'));
-    $this->assertMenuLink('test6', array('has_children' => 0, 'depth' => 3), array('test5', 'test4'));
+    $this->assertMenuLink('test1', ['has_children' => 1, 'depth' => 1], [], ['test2', 'test3']);
+    $this->assertMenuLink('test2', ['has_children' => 1, 'depth' => 2], ['test1'], ['test3']);
+    $this->assertMenuLink('test4', ['has_children' => 1, 'depth' => 1], [], ['test5', 'test6']);
+    $this->assertMenuLink('test5', ['has_children' => 1, 'depth' => 2], ['test4'], ['test6']);
+    $this->assertMenuLink('test6', ['has_children' => 0, 'depth' => 3], ['test5', 'test4']);
 
     $this->moveMenuLink('test2', 'test5');
     // After the 1st move.
@@ -125,12 +125,12 @@ public function testMenuLinkMoving() {
     // ---- test3
     // --- test6
 
-    $this->assertMenuLink('test1', array('has_children' => 0, 'depth' => 1));
-    $this->assertMenuLink('test2', array('has_children' => 1, 'depth' => 3), array('test5', 'test4'), array('test3'));
-    $this->assertMenuLink('test3', array('has_children' => 0, 'depth' => 4), array('test2', 'test5', 'test4'));
-    $this->assertMenuLink('test4', array('has_children' => 1, 'depth' => 1), array(), array('test5', 'test2', 'test3', 'test6'));
-    $this->assertMenuLink('test5', array('has_children' => 1, 'depth' => 2), array('test4'), array('test2', 'test3', 'test6'));
-    $this->assertMenuLink('test6', array('has_children' => 0, 'depth' => 3), array('test5', 'test4'));
+    $this->assertMenuLink('test1', ['has_children' => 0, 'depth' => 1]);
+    $this->assertMenuLink('test2', ['has_children' => 1, 'depth' => 3], ['test5', 'test4'], ['test3']);
+    $this->assertMenuLink('test3', ['has_children' => 0, 'depth' => 4], ['test2', 'test5', 'test4']);
+    $this->assertMenuLink('test4', ['has_children' => 1, 'depth' => 1], [], ['test5', 'test2', 'test3', 'test6']);
+    $this->assertMenuLink('test5', ['has_children' => 1, 'depth' => 2], ['test4'], ['test2', 'test3', 'test6']);
+    $this->assertMenuLink('test6', ['has_children' => 0, 'depth' => 3], ['test5', 'test4']);
 
     $this->moveMenuLink('test4', 'test1');
     $this->moveMenuLink('test3', 'test1');
@@ -143,12 +143,12 @@ public function testMenuLinkMoving() {
     // ---- test2
     // ---- test6
 
-    $this->assertMenuLink('test1', array('has_children' => 1, 'depth' => 1), array(), array('test4', 'test5', 'test2', 'test3', 'test6'));
-    $this->assertMenuLink('test2', array('has_children' => 0, 'depth' => 4), array('test5', 'test4', 'test1'));
-    $this->assertMenuLink('test3', array('has_children' => 0, 'depth' => 2), array('test1'));
-    $this->assertMenuLink('test4', array('has_children' => 1, 'depth' => 2), array('test1'), array('test2', 'test5', 'test6'));
-    $this->assertMenuLink('test5', array('has_children' => 1, 'depth' => 3), array('test4', 'test1'), array('test2', 'test6'));
-    $this->assertMenuLink('test6', array('has_children' => 0, 'depth' => 4), array('test5', 'test4', 'test1'));
+    $this->assertMenuLink('test1', ['has_children' => 1, 'depth' => 1], [], ['test4', 'test5', 'test2', 'test3', 'test6']);
+    $this->assertMenuLink('test2', ['has_children' => 0, 'depth' => 4], ['test5', 'test4', 'test1']);
+    $this->assertMenuLink('test3', ['has_children' => 0, 'depth' => 2], ['test1']);
+    $this->assertMenuLink('test4', ['has_children' => 1, 'depth' => 2], ['test1'], ['test2', 'test5', 'test6']);
+    $this->assertMenuLink('test5', ['has_children' => 1, 'depth' => 3], ['test4', 'test1'], ['test2', 'test6']);
+    $this->assertMenuLink('test6', ['has_children' => 0, 'depth' => 4], ['test5', 'test4', 'test1']);
 
     // Deleting a link in the middle should re-attach child links to the parent.
     $this->treeStorage->delete('test4');
@@ -159,12 +159,12 @@ public function testMenuLinkMoving() {
     // -- test5
     // --- test2
     // --- test6
-    $this->assertMenuLink('test1', array('has_children' => 1, 'depth' => 1), array(), array('test5', 'test2', 'test3', 'test6'));
-    $this->assertMenuLink('test2', array('has_children' => 0, 'depth' => 3), array('test5', 'test1'));
-    $this->assertMenuLink('test3', array('has_children' => 0, 'depth' => 2), array('test1'));
+    $this->assertMenuLink('test1', ['has_children' => 1, 'depth' => 1], [], ['test5', 'test2', 'test3', 'test6']);
+    $this->assertMenuLink('test2', ['has_children' => 0, 'depth' => 3], ['test5', 'test1']);
+    $this->assertMenuLink('test3', ['has_children' => 0, 'depth' => 2], ['test1']);
     $this->assertFalse($this->treeStorage->load('test4'));
-    $this->assertMenuLink('test5', array('has_children' => 1, 'depth' => 2), array('test1'), array('test2', 'test6'));
-    $this->assertMenuLink('test6', array('has_children' => 0, 'depth' => 3), array('test5', 'test1'));
+    $this->assertMenuLink('test5', ['has_children' => 1, 'depth' => 2], ['test1'], ['test2', 'test6']);
+    $this->assertMenuLink('test6', ['has_children' => 0, 'depth' => 3], ['test5', 'test1']);
   }
 
   /**
@@ -177,12 +177,12 @@ public function testMenuDisabledChildLinks() {
     // -- test2 (disabled)
 
     $this->addMenuLink('test1', '');
-    $this->assertMenuLink('test1', array('has_children' => 0, 'depth' => 1));
+    $this->assertMenuLink('test1', ['has_children' => 0, 'depth' => 1]);
 
-    $this->addMenuLink('test2', 'test1', '<front>', array(), 'tools', array('enabled' => 0));
+    $this->addMenuLink('test2', 'test1', '<front>', [], 'tools', ['enabled' => 0]);
     // The 1st link does not have any visible children, so has_children is 0.
-    $this->assertMenuLink('test1', array('has_children' => 0, 'depth' => 1));
-    $this->assertMenuLink('test2', array('has_children' => 0, 'depth' => 2, 'enabled' => 0), array('test1'));
+    $this->assertMenuLink('test1', ['has_children' => 0, 'depth' => 1]);
+    $this->assertMenuLink('test2', ['has_children' => 0, 'depth' => 2, 'enabled' => 0], ['test1']);
 
     // Add more links with parent on the previous one.
     // <footer>
@@ -198,8 +198,8 @@ public function testMenuDisabledChildLinks() {
     // ------- test7
     // -------- test8
     // --------- test9
-    $this->addMenuLink('footerA', '', '<front>', array(), 'footer');
-    $visible_children = array();
+    $this->addMenuLink('footerA', '', '<front>', [], 'footer');
+    $visible_children = [];
     for ($i = 3; $i <= $this->treeStorage->maxDepth(); $i++) {
       $parent = $i - 1;
       $this->addMenuLink("test$i", "test$parent");
@@ -207,7 +207,7 @@ public function testMenuDisabledChildLinks() {
     }
     // The 1st link does not have any visible children, so has_children is still
     // 0. However, it has visible links below it that will be found.
-    $this->assertMenuLink('test1', array('has_children' => 0, 'depth' => 1), array(), $visible_children);
+    $this->assertMenuLink('test1', ['has_children' => 0, 'depth' => 1], [], $visible_children);
     // This should fail since test9 would end up at greater than max depth.
     try {
       $this->moveMenuLink('test1', 'footerA');
@@ -219,7 +219,7 @@ public function testMenuDisabledChildLinks() {
     // The opposite move should work, and change the has_children flag.
     $this->moveMenuLink('footerA', 'test1');
     $visible_children[] = 'footerA';
-    $this->assertMenuLink('test1', array('has_children' => 1, 'depth' => 1), array(), $visible_children);
+    $this->assertMenuLink('test1', ['has_children' => 1, 'depth' => 1], [], $visible_children);
   }
 
   /**
@@ -241,7 +241,7 @@ public function testLoadTree() {
     $this->assertEqual(count($tree['test4']['subtree']['test5']['subtree']), 0);
 
     $parameters = new MenuTreeParameters();
-    $parameters->setActiveTrail(array('test4', 'test5'));
+    $parameters->setActiveTrail(['test4', 'test5']);
     $data = $this->treeStorage->loadTreeData('tools', $parameters);
     $tree = $data['tree'];
     $this->assertEqual(count($tree['test1']['subtree']), 1);
@@ -342,10 +342,10 @@ public function testMenuRebuild() {
    * Tests MenuTreeStorage::loadByProperties().
    */
   public function testLoadByProperties() {
-    $tests = array(
-      array('foo' => 'bar'),
-      array(0 => 'wrong'),
-    );
+    $tests = [
+      ['foo' => 'bar'],
+      [0 => 'wrong'],
+    ];
     $message = 'An invalid property name throws an exception.';
     foreach ($tests as $properties) {
       try {
@@ -357,8 +357,8 @@ public function testLoadByProperties() {
         $this->pass($message);
       }
     }
-    $this->addMenuLink('test_link.1', '', 'test', array(), 'menu1');
-    $properties = array('menu_name' => 'menu1');
+    $this->addMenuLink('test_link.1', '', 'test', [], 'menu1');
+    $properties = ['menu_name' => 'menu1'];
     $links = $this->treeStorage->loadByProperties($properties);
     $this->assertEqual('menu1', $links['test_link.1']['menu_name']);
     $this->assertEqual('test', $links['test_link.1']['route_name']);
@@ -367,17 +367,17 @@ public function testLoadByProperties() {
   /**
    * Adds a link with the given ID and supply defaults.
    */
-  protected function addMenuLink($id, $parent = '', $route_name = 'test', $route_parameters = array(), $menu_name = 'tools', $extra = array()) {
-    $link = array(
+  protected function addMenuLink($id, $parent = '', $route_name = 'test', $route_parameters = [], $menu_name = 'tools', $extra = []) {
+    $link = [
       'id' => $id,
       'menu_name' => $menu_name,
       'route_name' => $route_name,
       'route_parameters' => $route_parameters,
       'title' => 'test',
       'parent' => $parent,
-      'options' => array(),
-      'metadata' => array(),
-    ) + $extra;
+      'options' => [],
+      'metadata' => [],
+    ] + $extra;
     $this->treeStorage->save($link);
   }
 
@@ -407,7 +407,7 @@ protected function moveMenuLink($id, $new_parent) {
    * @param array $children
    *   Array of child IDs that are visible (enabled == 1).
    */
-  protected function assertMenuLink($id, array $expected_properties, array $parents = array(), array $children = array()) {
+  protected function assertMenuLink($id, array $expected_properties, array $parents = [], array $children = []) {
     $query = $this->connection->select('menu_tree');
     $query->fields('menu_tree');
     $query->condition('id', $id);
@@ -422,7 +422,7 @@ protected function assertMenuLink($id, array $expected_properties, array $parent
     array_unshift($parents, $raw['id']);
 
     $query = $this->connection->select('menu_tree');
-    $query->fields('menu_tree', array('id', 'mlid'));
+    $query->fields('menu_tree', ['id', 'mlid']);
     $query->condition('id', $parents, 'IN');
     $found_parents = $query->execute()->fetchAllKeyed(0, 1);
 
diff --git a/core/tests/Drupal/KernelTests/Core/Path/AliasTest.php b/core/tests/Drupal/KernelTests/Core/Path/AliasTest.php
index ad1e6d494dbb71cdc6ef8edaf9413422306a8884..e432028037459e662901d423e61dd9ee996d7c81 100644
--- a/core/tests/Drupal/KernelTests/Core/Path/AliasTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Path/AliasTest.php
@@ -29,10 +29,10 @@ function testCRUD() {
     foreach ($aliases as $idx => $alias) {
       $aliasStorage->save($alias['source'], $alias['alias'], $alias['langcode']);
 
-      $result = $connection->query('SELECT * FROM {url_alias} WHERE source = :source AND alias= :alias AND langcode = :langcode', array(':source' => $alias['source'], ':alias' => $alias['alias'], ':langcode' => $alias['langcode']));
+      $result = $connection->query('SELECT * FROM {url_alias} WHERE source = :source AND alias= :alias AND langcode = :langcode', [':source' => $alias['source'], ':alias' => $alias['alias'], ':langcode' => $alias['langcode']]);
       $rows = $result->fetchAll();
 
-      $this->assertEqual(count($rows), 1, format_string('Created an entry for %alias.', array('%alias' => $alias['alias'])));
+      $this->assertEqual(count($rows), 1, format_string('Created an entry for %alias.', ['%alias' => $alias['alias']]));
 
       //Cache the pid for further tests.
       $aliases[$idx]['pid'] = $rows[0]->pid;
@@ -41,12 +41,12 @@ function testCRUD() {
     //Load a few aliases
     foreach ($aliases as $alias) {
       $pid = $alias['pid'];
-      $loadedAlias = $aliasStorage->load(array('pid' => $pid));
-      $this->assertEqual($loadedAlias, $alias, format_string('Loaded the expected path with pid %pid.', array('%pid' => $pid)));
+      $loadedAlias = $aliasStorage->load(['pid' => $pid]);
+      $this->assertEqual($loadedAlias, $alias, format_string('Loaded the expected path with pid %pid.', ['%pid' => $pid]));
     }
 
     // Load alias by source path.
-    $loadedAlias = $aliasStorage->load(array('source' => '/node/1'));
+    $loadedAlias = $aliasStorage->load(['source' => '/node/1']);
     $this->assertEqual($loadedAlias['alias'], '/alias_for_node_1_und', 'The last created alias loaded by default.');
 
     //Update a few aliases
@@ -55,21 +55,21 @@ function testCRUD() {
 
       $this->assertEqual($alias['alias'], $fields['original']['alias']);
 
-      $result = $connection->query('SELECT pid FROM {url_alias} WHERE source = :source AND alias= :alias AND langcode = :langcode', array(':source' => $alias['source'], ':alias' => $alias['alias'] . '_updated', ':langcode' => $alias['langcode']));
+      $result = $connection->query('SELECT pid FROM {url_alias} WHERE source = :source AND alias= :alias AND langcode = :langcode', [':source' => $alias['source'], ':alias' => $alias['alias'] . '_updated', ':langcode' => $alias['langcode']]);
       $pid = $result->fetchField();
 
-      $this->assertEqual($pid, $alias['pid'], format_string('Updated entry for pid %pid.', array('%pid' => $pid)));
+      $this->assertEqual($pid, $alias['pid'], format_string('Updated entry for pid %pid.', ['%pid' => $pid]));
     }
 
     //Delete a few aliases
     foreach ($aliases as $alias) {
       $pid = $alias['pid'];
-      $aliasStorage->delete(array('pid' => $pid));
+      $aliasStorage->delete(['pid' => $pid]);
 
-      $result = $connection->query('SELECT * FROM {url_alias} WHERE pid = :pid', array(':pid' => $pid));
+      $result = $connection->query('SELECT * FROM {url_alias} WHERE pid = :pid', [':pid' => $pid]);
       $rows = $result->fetchAll();
 
-      $this->assertEqual(count($rows), 0, format_string('Deleted entry with pid %pid.', array('%pid' => $pid)));
+      $this->assertEqual(count($rows), 0, format_string('Deleted entry with pid %pid.', ['%pid' => $pid]));
     }
   }
 
@@ -84,21 +84,21 @@ function testLookupPath() {
 
     // Test the situation where the source is the same for multiple aliases.
     // Start with a language-neutral alias, which we will override.
-    $path = array(
+    $path = [
       'source' => "/user/1",
       'alias' => '/foo',
-    );
+    ];
 
     $aliasStorage->save($path['source'], $path['alias']);
     $this->assertEqual($aliasManager->getAliasByPath($path['source']), $path['alias'], 'Basic alias lookup works.');
     $this->assertEqual($aliasManager->getPathByAlias($path['alias']), $path['source'], 'Basic source lookup works.');
 
     // Create a language specific alias for the default language (English).
-    $path = array(
+    $path = [
       'source' => "/user/1",
       'alias' => "/users/Dries",
       'langcode' => 'en',
-    );
+    ];
     $aliasStorage->save($path['source'], $path['alias'], $path['langcode']);
     // Hook that clears cache is not executed with unit tests.
     \Drupal::service('path.alias_manager')->cacheClear();
@@ -106,19 +106,19 @@ function testLookupPath() {
     $this->assertEqual($aliasManager->getPathByAlias($path['alias']), $path['source'], 'English source overrides language-neutral source.');
 
     // Create a language-neutral alias for the same path, again.
-    $path = array(
+    $path = [
       'source' => "/user/1",
       'alias' => '/bar',
-    );
+    ];
     $aliasStorage->save($path['source'], $path['alias']);
     $this->assertEqual($aliasManager->getAliasByPath($path['source']), "/users/Dries", 'English alias still returned after entering a language-neutral alias.');
 
     // Create a language-specific (xx-lolspeak) alias for the same path.
-    $path = array(
+    $path = [
       'source' => "/user/1",
       'alias' => '/LOL',
       'langcode' => 'xx-lolspeak',
-    );
+    ];
     $aliasStorage->save($path['source'], $path['alias'], $path['langcode']);
     $this->assertEqual($aliasManager->getAliasByPath($path['source']), "/users/Dries", 'English alias still returned after entering a LOLspeak alias.');
     // The LOLspeak alias should be returned if we really want LOLspeak.
@@ -126,11 +126,11 @@ function testLookupPath() {
 
     // Create a new alias for this path in English, which should override the
     // previous alias for "user/1".
-    $path = array(
+    $path = [
       'source' => "/user/1",
       'alias' => '/users/my-new-path',
       'langcode' => 'en',
-    );
+    ];
     $aliasStorage->save($path['source'], $path['alias'], $path['langcode']);
     // Hook that clears cache is not executed with unit tests.
     $aliasManager->cacheClear();
@@ -139,7 +139,7 @@ function testLookupPath() {
 
     // Remove the English aliases, which should cause a fallback to the most
     // recently created language-neutral alias, 'bar'.
-    $aliasStorage->delete(array('langcode' => 'en'));
+    $aliasStorage->delete(['langcode' => 'en']);
     // Hook that clears cache is not executed with unit tests.
     $aliasManager->cacheClear();
     $this->assertEqual($aliasManager->getAliasByPath($path['source']), '/bar', 'Path lookup falls back to recently created language-neutral alias.');
@@ -190,7 +190,7 @@ function testWhitelist() {
     $this->assertNull($whitelist->get($this->randomMachineName()));
 
     // Remove the user alias again, whitelist entry should be removed.
-    $aliasStorage->delete(array('source' => '/user/1'));
+    $aliasStorage->delete(['source' => '/user/1']);
     $aliasManager->cacheClear();
     $this->assertNull($whitelist->get('user'));
     $this->assertTrue($whitelist->get('admin'));
diff --git a/core/tests/Drupal/KernelTests/Core/Path/PathUnitTestBase.php b/core/tests/Drupal/KernelTests/Core/Path/PathUnitTestBase.php
index 9c50f9a4519cffae479ee92a7266e83b2e863518..671dbc4792b2360b21c8c3824c59fcc4eef142c7 100644
--- a/core/tests/Drupal/KernelTests/Core/Path/PathUnitTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Path/PathUnitTestBase.php
@@ -21,7 +21,7 @@ protected function setUp() {
     $this->fixtures = new UrlAliasFixtures();
     // The alias whitelist expects that the menu path roots are set by a
     // menu router rebuild.
-    \Drupal::state()->set('router.path_roots', array('user', 'admin'));
+    \Drupal::state()->set('router.path_roots', ['user', 'admin']);
   }
 
   protected function tearDown() {
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Condition/CurrentThemeConditionTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/Condition/CurrentThemeConditionTest.php
index f152319390f13a308953ab6dcc1aa9ee517ffebc..7a69d2eb04a13d6cbca910d1b7c4ec9abd767366 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Condition/CurrentThemeConditionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Condition/CurrentThemeConditionTest.php
@@ -15,24 +15,24 @@ class CurrentThemeConditionTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('system', 'theme_test');
+  public static $modules = ['system', 'theme_test'];
 
   /**
    * Tests the current theme condition.
    */
   public function testCurrentTheme() {
-    \Drupal::service('theme_handler')->install(array('test_theme'));
+    \Drupal::service('theme_handler')->install(['test_theme']);
 
     $manager = \Drupal::service('plugin.manager.condition');
     /** @var $condition \Drupal\Core\Condition\ConditionInterface */
     $condition = $manager->createInstance('current_theme');
-    $condition->setConfiguration(array('theme' => 'test_theme'));
+    $condition->setConfiguration(['theme' => 'test_theme']);
     /** @var $condition_negated \Drupal\Core\Condition\ConditionInterface */
     $condition_negated = $manager->createInstance('current_theme');
-    $condition_negated->setConfiguration(array('theme' => 'test_theme', 'negate' => TRUE));
+    $condition_negated->setConfiguration(['theme' => 'test_theme', 'negate' => TRUE]);
 
-    $this->assertEqual($condition->summary(), SafeMarkup::format('The current theme is @theme', array('@theme' => 'test_theme')));
-    $this->assertEqual($condition_negated->summary(), SafeMarkup::format('The current theme is not @theme', array('@theme' => 'test_theme')));
+    $this->assertEqual($condition->summary(), SafeMarkup::format('The current theme is @theme', ['@theme' => 'test_theme']));
+    $this->assertEqual($condition_negated->summary(), SafeMarkup::format('The current theme is not @theme', ['@theme' => 'test_theme']));
 
     // The expected theme has not been set up yet.
     $this->assertFalse($condition->execute());
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Condition/RequestPathTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/Condition/RequestPathTest.php
index 02f2a5de2e4b599bbc41fa08c58a4276b4ae2448..68b6eb770e82e2aabb0efbbb3d1373ab621adc63 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Condition/RequestPathTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Condition/RequestPathTest.php
@@ -42,7 +42,7 @@ class RequestPathTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'field', 'path');
+  public static $modules = ['system', 'user', 'field', 'path'];
 
   /**
    * The current path.
@@ -57,7 +57,7 @@ class RequestPathTest extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->installSchema('system', array('sequences'));
+    $this->installSchema('system', ['sequences']);
 
     $this->pluginManager = $this->container->get('plugin.manager.condition');
 
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/ContextPluginTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/ContextPluginTest.php
index 3c25184ab1e06fce42d97e4bb757b427daf7ce28..10e35e559707e1532b44b63980bd75a1564c9e15 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/ContextPluginTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/ContextPluginTest.php
@@ -17,7 +17,7 @@
  */
 class ContextPluginTest extends KernelTestBase {
 
-  public static $modules = array('system', 'user', 'node', 'field', 'filter', 'text');
+  public static $modules = ['system', 'user', 'node', 'field', 'filter', 'text'];
 
   /**
    * Tests basic context definition and value getters and setters.
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/AnnotatedClassDiscoveryTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
index 9a714c433768e34faaff933a7a50714d1704ca95..9003713f53223b44438a9c8a25366b0b08436f91 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
@@ -13,69 +13,69 @@ class AnnotatedClassDiscoveryTest extends DiscoveryTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->expectedDefinitions = array(
-      'apple' => array(
+    $this->expectedDefinitions = [
+      'apple' => [
         'id' => 'apple',
         'label' => 'Apple',
         'color' => 'green',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Apple',
         'provider' => 'plugin_test',
-      ),
-      'banana' => array(
+      ],
+      'banana' => [
         'id' => 'banana',
         'label' => 'Banana',
         'color' => 'yellow',
-        'uses' => array(
+        'uses' => [
           'bread' => t('Banana bread'),
-          'loaf' => array(
+          'loaf' => [
             'singular' => '@count loaf',
             'plural' => '@count loaves',
             'context' => NULL,
-          ),
-        ),
+          ],
+        ],
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Banana',
         'provider' => 'plugin_test',
-      ),
-      'cherry' => array(
+      ],
+      'cherry' => [
         'id' => 'cherry',
         'label' => 'Cherry',
         'color' => 'red',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Cherry',
         'provider' => 'plugin_test',
-      ),
-      'kale' => array(
+      ],
+      'kale' => [
         'id' => 'kale',
         'label' => 'Kale',
         'color' => 'green',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Kale',
         'provider' => 'plugin_test',
-      ),
-      'orange' => array(
+      ],
+      'orange' => [
         'id' => 'orange',
         'label' => 'Orange',
         'color' => 'orange',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Orange',
         'provider' => 'plugin_test',
-      ),
-      'big_apple' => array(
+      ],
+      'big_apple' => [
         'id' => 'big_apple',
         'label' => 'Big Apple',
         'color' => 'green',
         'class' => 'Drupal\plugin_test_extended\Plugin\plugin_test\fruit\BigApple',
         'provider' => 'plugin_test_extended',
-      ),
-      'extending_non_installed_class' => array(
+      ],
+      'extending_non_installed_class' => [
         'id' => 'extending_non_installed_class',
         'label' => 'A plugin whose class is extending from a non-installed module class',
         'color' => 'pink',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\ExtendingNonInstalledClass',
         'provider' => 'plugin_test',
-      ),
-    );
+      ],
+    ];
 
     $base_directory = \Drupal::root() . '/core/modules/system/tests/modules/plugin_test/src';
     $base_directory2 = \Drupal::root() . '/core/modules/system/tests/modules/plugin_test_extended/src';
-    $namespaces = new \ArrayObject(array('Drupal\plugin_test' => $base_directory, 'Drupal\plugin_test_extended' => $base_directory2));
+    $namespaces = new \ArrayObject(['Drupal\plugin_test' => $base_directory, 'Drupal\plugin_test_extended' => $base_directory2]);
 
     $annotation_namespaces = ['Drupal\plugin_test\Plugin\Annotation', 'Drupal\plugin_test_extended\Plugin\Annotation'];
     $this->discovery = new AnnotatedClassDiscovery('Plugin/plugin_test/fruit', $namespaces, 'Drupal\Component\Annotation\Plugin', $annotation_namespaces);
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomAnnotationClassDiscoveryTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomAnnotationClassDiscoveryTest.php
index 5cd8f756e9de3b1c04c2919f3aacee2a8dd0e26d..3ae576cfdfb6c8d1d59f72ddfbe984334d5fddd3 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomAnnotationClassDiscoveryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomAnnotationClassDiscoveryTest.php
@@ -15,23 +15,23 @@ class CustomAnnotationClassDiscoveryTest extends DiscoveryTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->expectedDefinitions = array(
-      'example_1' => array(
+    $this->expectedDefinitions = [
+      'example_1' => [
         'id' => 'example_1',
         'custom' => 'John',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\custom_annotation\Example1',
         'provider' => 'plugin_test',
-      ),
-      'example_2' => array(
+      ],
+      'example_2' => [
         'id' => 'example_2',
         'custom' => 'Paul',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\custom_annotation\Example2',
         'provider' => 'plugin_test',
-      ),
-    );
+      ],
+    ];
 
     $base_directory = \Drupal::root() . '/core/modules/system/tests/modules/plugin_test/src';
-    $root_namespaces = new \ArrayObject(array('Drupal\plugin_test' => $base_directory));
+    $root_namespaces = new \ArrayObject(['Drupal\plugin_test' => $base_directory]);
 
     $this->discovery = new AnnotatedClassDiscovery('Plugin/plugin_test/custom_annotation', $root_namespaces, 'Drupal\plugin_test\Plugin\Annotation\PluginExample');
     $this->emptyDiscovery = new AnnotatedClassDiscovery('Plugin/non_existing_module/non_existing_plugin_type', $root_namespaces, 'Drupal\plugin_test\Plugin\Annotation\PluginExample');
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php
index a9fbf799eab8794ddaa478654020b80dbdfe1585..a6ae259bc2fdec51803f3f2fcea2122e96040fb1 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php
@@ -15,73 +15,73 @@ class CustomDirectoryAnnotatedClassDiscoveryTest extends DiscoveryTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->expectedDefinitions = array(
-      'custom_example_1' => array(
+    $this->expectedDefinitions = [
+      'custom_example_1' => [
         'id' => 'custom_example_1',
         'custom' => 'Tim',
         'class' => 'Drupal\plugin_test\CustomDirectoryExample1',
         'provider' => 'plugin_test',
-      ),
-      'custom_example_2' => array(
+      ],
+      'custom_example_2' => [
         'id' => 'custom_example_2',
         'custom' => 'Meghan',
         'class' => 'Drupal\plugin_test\CustomDirectoryExample2',
         'provider' => 'plugin_test',
-      ),
-      'apple' => array(
+      ],
+      'apple' => [
         'id' => 'apple',
         'label' => 'Apple',
         'color' => 'green',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Apple',
         'provider' => 'plugin_test',
-      ),
-      'banana' => array(
+      ],
+      'banana' => [
         'id' => 'banana',
         'label' => 'Banana',
         'color' => 'yellow',
-        'uses' => array(
+        'uses' => [
           'bread' => t('Banana bread'),
-          'loaf' => array(
+          'loaf' => [
             'singular' => '@count loaf',
             'plural' => '@count loaves',
             'context' => NULL,
-          ),
-        ),
+          ],
+        ],
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Banana',
         'provider' => 'plugin_test',
-      ),
-      'cherry' => array(
+      ],
+      'cherry' => [
         'id' => 'cherry',
         'label' => 'Cherry',
         'color' => 'red',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Cherry',
         'provider' => 'plugin_test',
-      ),
-      'kale' => array(
+      ],
+      'kale' => [
         'id' => 'kale',
         'label' => 'Kale',
         'color' => 'green',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Kale',
         'provider' => 'plugin_test',
-      ),
-      'orange' => array(
+      ],
+      'orange' => [
         'id' => 'orange',
         'label' => 'Orange',
         'color' => 'orange',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Orange',
         'provider' => 'plugin_test',
-      ),
-      'extending_non_installed_class' => array(
+      ],
+      'extending_non_installed_class' => [
         'id' => 'extending_non_installed_class',
         'label' => 'A plugin whose class is extending from a non-installed module class',
         'color' => 'pink',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\ExtendingNonInstalledClass',
         'provider' => 'plugin_test',
-      ),
-    );
+      ],
+    ];
 
     $base_directory = \Drupal::root() . '/core/modules/system/tests/modules/plugin_test/src';
-    $namespaces = new \ArrayObject(array('Drupal\plugin_test' => $base_directory));
+    $namespaces = new \ArrayObject(['Drupal\plugin_test' => $base_directory]);
 
     $this->discovery = new AnnotatedClassDiscovery('', $namespaces);
     $empty_namespaces = new \ArrayObject();
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/DiscoveryTestBase.php b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/DiscoveryTestBase.php
index bbe207359a3208f2780d0f535f8cb0caa8050f35..054887707b5ae256b25e3edc9dabfa63887139ee 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/DiscoveryTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/DiscoveryTestBase.php
@@ -51,7 +51,7 @@ function testDiscoveryInterface() {
     }
 
     // Ensure that an empty array is returned if no plugin definitions are found.
-    $this->assertIdentical($this->emptyDiscovery->getDefinitions(), array(), 'array() returned if no plugin definitions are found.');
+    $this->assertIdentical($this->emptyDiscovery->getDefinitions(), [], 'array() returned if no plugin definitions are found.');
 
     // Ensure that NULL is returned as the definition of a non-existing plugin.
     $this->assertIdentical($this->emptyDiscovery->getDefinition('non_existing', FALSE), NULL, 'NULL returned as the definition of a non-existing plugin.');
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/StaticDiscoveryTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/StaticDiscoveryTest.php
index bd0c317220df5d173787f2a67484cecf34e7baab..fb9eb3a9ffdd8be1007cfa98ec7a9e1c454040cb 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/StaticDiscoveryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Discovery/StaticDiscoveryTest.php
@@ -13,20 +13,20 @@ class StaticDiscoveryTest extends DiscoveryTestBase {
 
   protected function setUp() {
     parent::setUp();
-    $this->expectedDefinitions = array(
-      'apple' => array(
+    $this->expectedDefinitions = [
+      'apple' => [
         'label' => 'Apple',
         'color' => 'green',
-      ),
-      'cherry' => array(
+      ],
+      'cherry' => [
         'label' => 'Cherry',
         'color' => 'red',
-      ),
-      'orange' => array(
+      ],
+      'orange' => [
         'label' => 'Orange',
         'color' => 'orange',
-      ),
-    );
+      ],
+    ];
     // Instead of registering the empty discovery component first and then
     // setting the plugin definitions, we set them first and then delete them
     // again. This implicitly tests StaticDiscovery::deleteDefinition() (in
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/FactoryTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/FactoryTest.php
index 47609902dcd751cb3f187254fbcb5c9f0bb6a119..783f6bc7f4224f540481c78ab3c0edc4787ce473 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/FactoryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/FactoryTest.php
@@ -16,7 +16,7 @@ class FactoryTest extends PluginTestBase {
    */
   function testDefaultFactory() {
     // Ensure a non-derivative plugin can be instantiated.
-    $plugin = $this->testPluginManager->createInstance('user_login', array('title' => 'Please enter your login name and password'));
+    $plugin = $this->testPluginManager->createInstance('user_login', ['title' => 'Please enter your login name and password']);
     $this->assertIdentical(get_class($plugin), 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserLoginBlock', 'Correct plugin class instantiated with default factory.');
     $this->assertIdentical($plugin->getTitle(), 'Please enter your login name and password', 'Plugin instance correctly configured.');
 
@@ -46,19 +46,19 @@ function testDefaultFactory() {
    */
   function testReflectionFactory() {
     // Ensure a non-derivative plugin can be instantiated.
-    $plugin = $this->mockBlockManager->createInstance('user_login', array('title' => 'Please enter your login name and password'));
+    $plugin = $this->mockBlockManager->createInstance('user_login', ['title' => 'Please enter your login name and password']);
     $this->assertIdentical(get_class($plugin), 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserLoginBlock', 'Correct plugin class instantiated.');
     $this->assertIdentical($plugin->getTitle(), 'Please enter your login name and password', 'Plugin instance correctly configured.');
 
     // Ensure a derivative plugin can be instantiated.
-    $plugin = $this->mockBlockManager->createInstance('menu:main_menu', array('depth' => 2));
+    $plugin = $this->mockBlockManager->createInstance('menu:main_menu', ['depth' => 2]);
     $this->assertIdentical($plugin->getContent(), '<ul><li>1<ul><li>1.1</li></ul></li></ul>', 'Derived plugin instance correctly instantiated and configured.');
 
     // Ensure that attempting to instantiate non-existing plugins throws a
     // PluginException. Test this for a non-existing base plugin, a non-existing
     // derivative plugin, and a base plugin that may not be used without
     // deriving.
-    foreach (array('non_existing', 'menu:non_existing', 'menu') as $invalid_id) {
+    foreach (['non_existing', 'menu:non_existing', 'menu'] as $invalid_id) {
       try {
         $this->mockBlockManager->createInstance($invalid_id);
         $this->fail('Drupal\Component\Plugin\Exception\ExceptionInterface expected');
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/InspectionTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/InspectionTest.php
index 4ff9573c808e4612cdea4788f5ddc0054a9f7a25..eaff844551cc43cba4f086e6b57c14ec9b6f0271 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/InspectionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/InspectionTest.php
@@ -13,7 +13,7 @@ class InspectionTest extends PluginTestBase {
    * Ensure the test plugins correctly implement getPluginId() and getPluginDefinition().
    */
   function testInspection() {
-    foreach (array('user_login') as $id) {
+    foreach (['user_login'] as $id) {
       $plugin = $this->testPluginManager->createInstance($id);
       $expected_definition = $this->testPluginExpectedDefinitions[$id];
       $this->assertIdentical($plugin->getPluginId(), $id);
@@ -22,7 +22,7 @@ function testInspection() {
     }
     // Skip the 'menu' derived blocks, because MockMenuBlock does not implement
     // PluginInspectionInterface. The others do by extending PluginBase.
-    foreach (array('user_login', 'layout') as $id) {
+    foreach (['user_login', 'layout'] as $id) {
       $plugin = $this->mockBlockManager->createInstance($id);
       $expected_definition = $this->mockBlockExpectedDefinitions[$id];
       $this->assertIdentical($plugin->getPluginId(), $id);
@@ -30,7 +30,7 @@ function testInspection() {
       $this->assertIdentical($this->castSafeStrings($plugin->getPluginDefinition()), $expected_definition);
     }
     // Test a plugin manager that provides defaults.
-    foreach (array('test_block1', 'test_block2') as $id) {
+    foreach (['test_block1', 'test_block2'] as $id) {
       $plugin = $this->defaultsTestPluginManager->createInstance($id);
       $expected_definition = $this->defaultsTestPluginExpectedDefinitions[$id];
       $this->assertIdentical($plugin->getPluginId(), $id);
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/PluginTestBase.php b/core/tests/Drupal/KernelTests/Core/Plugin/PluginTestBase.php
index dd5528b6da48d4da356f8701d761f38043033403..ccc82369a0e48c8f1c93fc3ea87fddcf764ae8a9 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/PluginTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/PluginTestBase.php
@@ -20,7 +20,7 @@ abstract class PluginTestBase extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('plugin_test');
+  public static $modules = ['plugin_test'];
 
   protected $testPluginManager;
   protected $testPluginExpectedDefinitions;
@@ -42,7 +42,7 @@ protected function setUp() {
     //   as derivatives and ReflectionFactory.
     $this->testPluginManager = new TestPluginManager();
     $this->mockBlockManager = new MockBlockManager();
-    $module_handler = new ModuleHandler(\Drupal::root(), array(), new MemoryBackend(), $this->container->get('event_dispatcher'));
+    $module_handler = new ModuleHandler(\Drupal::root(), [], new MemoryBackend(), $this->container->get('event_dispatcher'));
     $this->defaultsTestPluginManager = new DefaultsTestPluginManager($module_handler);
 
     // The expected plugin definitions within each manager. Several tests assert
@@ -50,91 +50,91 @@ protected function setUp() {
     // necessary API functions.
     // @see TestPluginManager::_construct().
     // @see MockBlockManager::_construct().
-    $this->testPluginExpectedDefinitions = array(
-      'user_login' => array(
+    $this->testPluginExpectedDefinitions = [
+      'user_login' => [
         'label' => 'User login',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserLoginBlock',
-      ),
-    );
-    $this->mockBlockExpectedDefinitions = array(
-      'user_login' => array(
+      ],
+    ];
+    $this->mockBlockExpectedDefinitions = [
+      'user_login' => [
         'id' => 'user_login',
         'label' => 'User login',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserLoginBlock',
-      ),
-      'menu:main_menu' => array(
+      ],
+      'menu:main_menu' => [
         'id' => 'menu',
         'label' => 'Main menu',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockMenuBlock',
-      ),
-      'menu:navigation' => array(
+      ],
+      'menu:navigation' => [
         'id' => 'menu',
         'label' => 'Navigation',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockMenuBlock',
-      ),
-      'menu:foo' => array(
+      ],
+      'menu:foo' => [
         'id' => 'menu',
         'label' => 'Base label',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockMenuBlock',
         'setting' => 'default',
-      ),
-      'layout' => array(
+      ],
+      'layout' => [
         'id' => 'layout',
         'label' => 'Layout',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockLayoutBlock',
-      ),
-      'layout:foo' => array(
+      ],
+      'layout:foo' => [
         'id' => 'layout',
         'label' => 'Layout Foo',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockLayoutBlock',
-      ),
-      'user_name' => array(
+      ],
+      'user_name' => [
         'id' => 'user_name',
         'label' => 'User name',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserNameBlock',
-        'context' => array(
+        'context' => [
           'user' => new ContextDefinition('entity:user', 'User'),
-        ),
-      ),
-      'user_name_optional' => array(
+        ],
+      ],
+      'user_name_optional' => [
         'id' => 'user_name_optional',
         'label' => 'User name optional',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserNameBlock',
-        'context' => array(
+        'context' => [
           'user' => new ContextDefinition('entity:user', 'User', FALSE),
-        ),
-      ),
-      'string_context' => array(
+        ],
+      ],
+      'string_context' => [
         'id' => 'string_context',
         'label' => 'String typed data',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\TypedDataStringBlock',
-      ),
-      'complex_context' => array(
+      ],
+      'complex_context' => [
         'id' => 'complex_context',
         'label' => 'Complex context',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockComplexContextBlock',
-        'context' => array(
+        'context' => [
           'user' => new ContextDefinition('entity:user', 'User'),
           'node' => new ContextDefinition('entity:node', 'Node'),
-        ),
-      ),
-    );
-    $this->defaultsTestPluginExpectedDefinitions = array(
-      'test_block1' => array(
-        'metadata' => array(
+        ],
+      ],
+    ];
+    $this->defaultsTestPluginExpectedDefinitions = [
+      'test_block1' => [
+        'metadata' => [
           'default' => TRUE,
           'custom' => TRUE,
-        ),
+        ],
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockTestBlock',
-      ),
-      'test_block2' => array(
-        'metadata' => array(
+      ],
+      'test_block2' => [
+        'metadata' => [
           'default' => FALSE,
           'custom' => TRUE,
-        ),
+        ],
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\mock_block\MockTestBlock',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/KernelTests/Core/Queue/QueueSerializationTest.php b/core/tests/Drupal/KernelTests/Core/Queue/QueueSerializationTest.php
index 3ea4c66ea52699bc7420cf18bb054deaf354b79f..b4e122b4b7a60cd3ff7276df86867e9a72b98fe4 100644
--- a/core/tests/Drupal/KernelTests/Core/Queue/QueueSerializationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Queue/QueueSerializationTest.php
@@ -30,7 +30,7 @@ class QueueSerializationTest extends KernelTestBase implements FormInterface {
    *
    * @var array
    */
-  public static $modules = array('system', 'user', 'aggregator');
+  public static $modules = ['system', 'user', 'aggregator'];
 
   /**
    * {@inheritdoc}
@@ -80,10 +80,10 @@ protected function setUp() {
     $this->installSchema('system', ['key_value_expire', 'sequences']);
     $this->installEntitySchema('user');
     $this->queue = \Drupal::service('queue.database')->get('aggregator_refresh');
-    $test_user = User::create(array(
+    $test_user = User::create([
       'name' => 'foobar',
       'mail' => 'foobar@example.com',
-    ));
+    ]);
     $test_user->save();
     \Drupal::service('current_user')->setAccount($test_user);
   }
diff --git a/core/tests/Drupal/KernelTests/Core/Queue/QueueTest.php b/core/tests/Drupal/KernelTests/Core/Queue/QueueTest.php
index 1a2af7d416c139b2486a1532d85dfe787b39a365..8bf48340aace9adb65ffc41c633024f4f9c8a4ae 100644
--- a/core/tests/Drupal/KernelTests/Core/Queue/QueueTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Queue/QueueTest.php
@@ -50,9 +50,9 @@ public function testMemoryQueue() {
    */
   protected function queueTest($queue1, $queue2) {
     // Create four items.
-    $data = array();
+    $data = [];
     for ($i = 0; $i < 4; $i++) {
-      $data[] = array($this->randomMachineName() => $this->randomMachineName());
+      $data[] = [$this->randomMachineName() => $this->randomMachineName()];
     }
 
     // Queue items 1 and 2 in the queue1.
@@ -60,8 +60,8 @@ protected function queueTest($queue1, $queue2) {
     $queue1->createItem($data[1]);
 
     // Retrieve two items from queue1.
-    $items = array();
-    $new_items = array();
+    $items = [];
+    $new_items = [];
 
     $items[] = $item = $queue1->claimItem();
     $new_items[] = $item->data;
diff --git a/core/tests/Drupal/KernelTests/Core/Render/Element/RenderElementTypesTest.php b/core/tests/Drupal/KernelTests/Core/Render/Element/RenderElementTypesTest.php
index 3e11695af3903ef58f3943c782cddfe7a815b577..4cfb32c7dd9db4a3e448a271a129a515ae1467c1 100644
--- a/core/tests/Drupal/KernelTests/Core/Render/Element/RenderElementTypesTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Render/Element/RenderElementTypesTest.php
@@ -18,11 +18,11 @@ class RenderElementTypesTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'router_test');
+  public static $modules = ['system', 'router_test'];
 
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
     \Drupal::service('router.builder')->rebuild();
   }
 
@@ -53,27 +53,27 @@ protected function assertElements(array $elements, $expected_html, $message) {
    */
   function testContainer() {
     // Basic container with no attributes.
-    $this->assertElements(array(
+    $this->assertElements([
       '#type' => 'container',
       '#markup' => 'foo',
-    ), "<div>foo</div>\n", "#type 'container' with no HTML attributes");
+    ], "<div>foo</div>\n", "#type 'container' with no HTML attributes");
 
     // Container with a class.
-    $this->assertElements(array(
+    $this->assertElements([
       '#type' => 'container',
       '#markup' => 'foo',
-      '#attributes' => array(
-        'class' => array('bar'),
-      ),
-    ), '<div class="bar">foo</div>' . "\n", "#type 'container' with a class HTML attribute");
+      '#attributes' => [
+        'class' => ['bar'],
+      ],
+    ], '<div class="bar">foo</div>' . "\n", "#type 'container' with a class HTML attribute");
 
     // Container with children.
-    $this->assertElements(array(
+    $this->assertElements([
       '#type' => 'container',
-      'child' => array(
+      'child' => [
         '#markup' => 'foo',
-      ),
-    ), "<div>foo</div>\n", "#type 'container' with child elements");
+      ],
+    ], "<div>foo</div>\n", "#type 'container' with child elements");
   }
 
   /**
@@ -81,111 +81,111 @@ function testContainer() {
    */
   function testHtmlTag() {
     // Test void element.
-    $this->assertElements(array(
+    $this->assertElements([
       '#type' => 'html_tag',
       '#tag' => 'meta',
       '#value' => 'ignored',
-      '#attributes' => array(
+      '#attributes' => [
         'name' => 'description',
         'content' => 'Drupal test',
-      ),
-    ), '<meta name="description" content="Drupal test" />' . "\n", "#type 'html_tag', void element renders properly");
+      ],
+    ], '<meta name="description" content="Drupal test" />' . "\n", "#type 'html_tag', void element renders properly");
 
     // Test non-void element.
-    $this->assertElements(array(
+    $this->assertElements([
       '#type' => 'html_tag',
       '#tag' => 'section',
       '#value' => 'value',
-      '#attributes' => array(
-        'class' => array('unicorns'),
-      ),
-    ), '<section class="unicorns">value</section>' . "\n", "#type 'html_tag', non-void element renders properly");
+      '#attributes' => [
+        'class' => ['unicorns'],
+      ],
+    ], '<section class="unicorns">value</section>' . "\n", "#type 'html_tag', non-void element renders properly");
 
     // Test empty void element tag.
-    $this->assertElements(array(
+    $this->assertElements([
       '#type' => 'html_tag',
       '#tag' => 'link',
-    ), "<link />\n", "#type 'html_tag' empty void element renders properly");
+    ], "<link />\n", "#type 'html_tag' empty void element renders properly");
 
     // Test empty non-void element tag.
-    $this->assertElements(array(
+    $this->assertElements([
       '#type' => 'html_tag',
       '#tag' => 'section',
-    ), "<section></section>\n", "#type 'html_tag' empty non-void element renders properly");
+    ], "<section></section>\n", "#type 'html_tag' empty non-void element renders properly");
   }
 
   /**
    * Tests system #type 'more_link'.
    */
   function testMoreLink() {
-    $elements = array(
-      array(
+    $elements = [
+      [
         'name' => "#type 'more_link' anchor tag generation without extra classes",
-        'value' => array(
+        'value' => [
           '#type' => 'more_link',
           '#url' => Url::fromUri('https://www.drupal.org'),
-        ),
+        ],
         'expected' => '//div[@class="more-link"]/a[@href="https://www.drupal.org" and text()="More"]',
-      ),
-      array(
+      ],
+      [
         'name' => "#type 'more_link' anchor tag generation with different link text",
-        'value' => array(
+        'value' => [
           '#type' => 'more_link',
           '#url' => Url::fromUri('https://www.drupal.org'),
           '#title' => 'More Titles',
-        ),
+        ],
         'expected' => '//div[@class="more-link"]/a[@href="https://www.drupal.org" and text()="More Titles"]',
-      ),
-      array(
+      ],
+      [
         'name' => "#type 'more_link' anchor tag generation with attributes on wrapper",
-        'value' => array(
+        'value' => [
           '#type' => 'more_link',
           '#url' => Url::fromUri('https://www.drupal.org'),
-          '#theme_wrappers' => array(
-            'container' => array(
-              '#attributes' => array(
+          '#theme_wrappers' => [
+            'container' => [
+              '#attributes' => [
                 'title' => 'description',
-                'class' => array('more-link', 'drupal', 'test'),
-              ),
-            ),
-          ),
-        ),
+                'class' => ['more-link', 'drupal', 'test'],
+              ],
+            ],
+          ],
+        ],
         'expected' => '//div[@title="description" and contains(@class, "more-link") and contains(@class, "drupal") and contains(@class, "test")]/a[@href="https://www.drupal.org" and text()="More"]',
-      ),
-      array(
+      ],
+      [
         'name' => "#type 'more_link' anchor tag with a relative path",
-        'value' => array(
+        'value' => [
           '#type' => 'more_link',
           '#url' => Url::fromRoute('router_test.1'),
-        ),
+        ],
         'expected' => '//div[@class="more-link"]/a[@href="' . Url::fromRoute('router_test.1')->toString() . '" and text()="More"]',
-      ),
-      array(
+      ],
+      [
         'name' => "#type 'more_link' anchor tag with a route",
-        'value' => array(
+        'value' => [
           '#type' => 'more_link',
           '#url' => Url::fromRoute('router_test.1'),
-        ),
+        ],
         'expected' => '//div[@class="more-link"]/a[@href="' . \Drupal::urlGenerator()->generate('router_test.1') . '" and text()="More"]',
-      ),
-      array(
+      ],
+      [
         'name' => "#type 'more_link' anchor tag with an absolute path",
-        'value' => array(
+        'value' => [
           '#type' => 'more_link',
           '#url' => Url::fromRoute('system.admin_content'),
-          '#options' => array('absolute' => TRUE),
-        ),
+          '#options' => ['absolute' => TRUE],
+        ],
         'expected' => '//div[@class="more-link"]/a[@href="' . Url::fromRoute('system.admin_content')->setAbsolute()->toString() . '" and text()="More"]',
-      ),
-      array(
+      ],
+      [
         'name' => "#type 'more_link' anchor tag to the front page",
-        'value' => array(
+        'value' => [
           '#type' => 'more_link',
           '#url' => Url::fromRoute('<front>'),
-        ),
+        ],
         'expected' => '//div[@class="more-link"]/a[@href="' . Url::fromRoute('<front>')->toString() . '" and text()="More"]',
-      ),
-    );
+      ],
+    ];
 
     foreach ($elements as $element) {
       $xml = new \SimpleXMLElement(\Drupal::service('renderer')->renderRoot($element['value']));
@@ -198,25 +198,25 @@ function testMoreLink() {
    * Tests system #type 'system_compact_link'.
    */
   function testSystemCompactLink() {
-    $elements = array(
-      array(
+    $elements = [
+      [
         'name' => "#type 'system_compact_link' when admin compact mode is off",
-        'value' => array(
+        'value' => [
           '#type' => 'system_compact_link',
-        ),
+        ],
         'expected' => '//div[@class="compact-link"]/a[contains(@href, "admin/compact/on?") and text()="Hide descriptions"]',
-      ),
-      array(
+      ],
+      [
         'name' => "#type 'system_compact_link' when adding extra attributes",
-        'value' => array(
+        'value' => [
           '#type' => 'system_compact_link',
-          '#attributes' => array(
-            'class' => array('kittens-rule'),
-          ),
-        ),
+          '#attributes' => [
+            'class' => ['kittens-rule'],
+          ],
+        ],
         'expected' => '//div[@class="compact-link"]/a[contains(@href, "admin/compact/on?") and @class="kittens-rule" and text()="Hide descriptions"]',
-      ),
-    );
+      ],
+    ];
 
     foreach ($elements as $element) {
       $xml = new \SimpleXMLElement(\Drupal::service('renderer')->renderRoot($element['value']));
@@ -227,13 +227,13 @@ function testSystemCompactLink() {
     // Set admin compact mode on for additional tests.
     \Drupal::request()->cookies->set('Drupal_visitor_admin_compact_mode', TRUE);
 
-    $element = array(
+    $element = [
       'name' => "#type 'system_compact_link' when admin compact mode is on",
-      'value' => array(
+      'value' => [
         '#type' => 'system_compact_link',
-      ),
+      ],
       'expected' => '//div[@class="compact-link"]/a[contains(@href, "admin/compact?") and text()="Show descriptions"]',
-    );
+    ];
 
     $xml = new \SimpleXMLElement(\Drupal::service('renderer')->renderRoot($element['value']));
     $result = $xml->xpath($element['expected']);
diff --git a/core/tests/Drupal/KernelTests/Core/Render/Element/TableSortExtenderTest.php b/core/tests/Drupal/KernelTests/Core/Render/Element/TableSortExtenderTest.php
index a77d52e51b125b88d65be9048bdf2b0a8db20fde..10b215bb619fadaf5b2a91fc0a54d6812bd659c8 100644
--- a/core/tests/Drupal/KernelTests/Core/Render/Element/TableSortExtenderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Render/Element/TableSortExtenderTest.php
@@ -20,121 +20,121 @@ function testTableSortInit() {
 
     // Test simple table headers.
 
-    $headers = array('foo', 'bar', 'baz');
+    $headers = ['foo', 'bar', 'baz'];
     // Reset $request->query to prevent parameters from Simpletest and Batch API
     // ending up in $ts['query'].
-    $expected_ts = array(
+    $expected_ts = [
       'name' => 'foo',
       'sql' => '',
       'sort' => 'asc',
-      'query' => array(),
-    );
+      'query' => [],
+    ];
     $request = Request::createFromGlobals();
-    $request->query->replace(array());
+    $request->query->replace([]);
     \Drupal::getContainer()->get('request_stack')->push($request);
     $ts = tablesort_init($headers);
-    $this->verbose(strtr('$ts: <pre>!ts</pre>', array('!ts' => Html::escape(var_export($ts, TRUE)))));
+    $this->verbose(strtr('$ts: <pre>!ts</pre>', ['!ts' => Html::escape(var_export($ts, TRUE))]));
     $this->assertEqual($ts, $expected_ts, 'Simple table headers sorted correctly.');
 
     // Test with simple table headers plus $_GET parameters that should _not_
     // override the default.
     $request = Request::createFromGlobals();
-    $request->query->replace(array(
+    $request->query->replace([
       // This should not override the table order because only complex
       // headers are overridable.
       'order' => 'bar',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
     $ts = tablesort_init($headers);
-    $this->verbose(strtr('$ts: <pre>!ts</pre>', array('!ts' => Html::escape(var_export($ts, TRUE)))));
+    $this->verbose(strtr('$ts: <pre>!ts</pre>', ['!ts' => Html::escape(var_export($ts, TRUE))]));
     $this->assertEqual($ts, $expected_ts, 'Simple table headers plus non-overriding $_GET parameters sorted correctly.');
 
     // Test with simple table headers plus $_GET parameters that _should_
     // override the default.
     $request = Request::createFromGlobals();
-    $request->query->replace(array(
+    $request->query->replace([
       'sort' => 'DESC',
       // Add an unrelated parameter to ensure that tablesort will include
       // it in the links that it creates.
       'alpha' => 'beta',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
     $expected_ts['sort'] = 'desc';
-    $expected_ts['query'] = array('alpha' => 'beta');
+    $expected_ts['query'] = ['alpha' => 'beta'];
     $ts = tablesort_init($headers);
-    $this->verbose(strtr('$ts: <pre>!ts</pre>', array('!ts' => Html::escape(var_export($ts, TRUE)))));
+    $this->verbose(strtr('$ts: <pre>!ts</pre>', ['!ts' => Html::escape(var_export($ts, TRUE))]));
     $this->assertEqual($ts, $expected_ts, 'Simple table headers plus $_GET parameters sorted correctly.');
 
     // Test complex table headers.
 
-    $headers = array(
+    $headers = [
       'foo',
-      array(
+      [
         'data' => '1',
         'field' => 'one',
         'sort' => 'asc',
         'colspan' => 1,
-      ),
-      array(
+      ],
+      [
         'data' => '2',
         'field' => 'two',
         'sort' => 'desc',
-      ),
-    );
+      ],
+    ];
     // Reset $_GET from previous assertion.
     $request = Request::createFromGlobals();
-    $request->query->replace(array(
+    $request->query->replace([
       'order' => '2',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
     $ts = tablesort_init($headers);
-    $expected_ts = array(
+    $expected_ts = [
       'name' => '2',
       'sql' => 'two',
       'sort' => 'desc',
-      'query' => array(),
-    );
-    $this->verbose(strtr('$ts: <pre>!ts</pre>', array('!ts' => Html::escape(var_export($ts, TRUE)))));
+      'query' => [],
+    ];
+    $this->verbose(strtr('$ts: <pre>!ts</pre>', ['!ts' => Html::escape(var_export($ts, TRUE))]));
     $this->assertEqual($ts, $expected_ts, 'Complex table headers sorted correctly.');
 
     // Test complex table headers plus $_GET parameters that should _not_
     // override the default.
     $request = Request::createFromGlobals();
-    $request->query->replace(array(
+    $request->query->replace([
       // This should not override the table order because this header does not
       // exist.
       'order' => 'bar',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
     $ts = tablesort_init($headers);
-    $expected_ts = array(
+    $expected_ts = [
       'name' => '1',
       'sql' => 'one',
       'sort' => 'asc',
-      'query' => array(),
-    );
-    $this->verbose(strtr('$ts: <pre>!ts</pre>', array('!ts' => Html::escape(var_export($ts, TRUE)))));
+      'query' => [],
+    ];
+    $this->verbose(strtr('$ts: <pre>!ts</pre>', ['!ts' => Html::escape(var_export($ts, TRUE))]));
     $this->assertEqual($ts, $expected_ts, 'Complex table headers plus non-overriding $_GET parameters sorted correctly.');
 
     // Test complex table headers plus $_GET parameters that _should_
     // override the default.
     $request = Request::createFromGlobals();
-    $request->query->replace(array(
+    $request->query->replace([
       'order' => '1',
       'sort' => 'ASC',
       // Add an unrelated parameter to ensure that tablesort will include
       // it in the links that it creates.
       'alpha' => 'beta',
-    ));
+    ]);
     \Drupal::getContainer()->get('request_stack')->push($request);
-    $expected_ts = array(
+    $expected_ts = [
       'name' => '1',
       'sql' => 'one',
       'sort' => 'asc',
-      'query' => array('alpha' => 'beta'),
-    );
+      'query' => ['alpha' => 'beta'],
+    ];
     $ts = tablesort_init($headers);
-    $this->verbose(strtr('$ts: <pre>!ts</pre>', array('!ts' => Html::escape(var_export($ts, TRUE)))));
+    $this->verbose(strtr('$ts: <pre>!ts</pre>', ['!ts' => Html::escape(var_export($ts, TRUE))]));
     $this->assertEqual($ts, $expected_ts, 'Complex table headers plus $_GET parameters sorted correctly.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Render/Element/TableTest.php b/core/tests/Drupal/KernelTests/Core/Render/Element/TableTest.php
index 0f9e5b696a103f4ccb3ef455b0a6b8d31dff0781..4fdb60edbbe0f626a68df6cdc9b0fcd679698e63 100644
--- a/core/tests/Drupal/KernelTests/Core/Render/Element/TableTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Render/Element/TableTest.php
@@ -22,14 +22,14 @@ class TableTest extends KernelTestBase {
    * Tableheader.js provides 'sticky' table headers, and is included by default.
    */
   function testThemeTableStickyHeaders() {
-    $header = array('one', 'two', 'three');
-    $rows = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));
-    $table = array(
+    $header = ['one', 'two', 'three'];
+    $rows = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#sticky' => TRUE,
-    );
+    ];
     $this->render($table);
     // Make sure tableheader.js was attached.
     $tableheader = $this->xpath("//script[contains(@src, 'tableheader.js')]");
@@ -41,12 +41,12 @@ function testThemeTableStickyHeaders() {
    * If $sticky is FALSE, no tableheader.js should be included.
    */
   function testThemeTableNoStickyHeaders() {
-    $header = array('one', 'two', 'three');
-    $rows = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));
-    $attributes = array();
+    $header = ['one', 'two', 'three'];
+    $rows = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+    $attributes = [];
     $caption = NULL;
-    $colgroups = array();
-    $table = array(
+    $colgroups = [];
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
@@ -54,7 +54,7 @@ function testThemeTableNoStickyHeaders() {
       '#caption' => $caption,
       '#colgroups' => $colgroups,
       '#sticky' => FALSE,
-    );
+    ];
     $this->render($table);
     // Make sure tableheader.js was not attached.
     $tableheader = $this->xpath("//script[contains(@src, 'tableheader.js')]");
@@ -67,19 +67,19 @@ function testThemeTableNoStickyHeaders() {
    * and that the empty text is displayed correctly.
    */
   function testThemeTableWithEmptyMessage() {
-    $header = array(
+    $header = [
       'Header 1',
-      array(
+      [
         'data' => 'Header 2',
         'colspan' => 2,
-      ),
-    );
-    $table = array(
+      ],
+    ];
+    $table = [
       '#type' => 'table',
       '#header' => $header,
-      '#rows' => array(),
+      '#rows' => [],
       '#empty' => 'Empty row.',
-    );
+    ];
 
     // Enable the Classy theme.
     \Drupal::service('theme_handler')->install(['classy']);
@@ -95,16 +95,16 @@ function testThemeTableWithEmptyMessage() {
    * Tests that the 'no_striping' option works correctly.
    */
   function testThemeTableWithNoStriping() {
-    $rows = array(
-      array(
-        'data' => array(1),
+    $rows = [
+      [
+        'data' => [1],
         'no_striping' => TRUE,
-      ),
-    );
-    $table = array(
+      ],
+    ];
+    $table = [
       '#type' => 'table',
       '#rows' => $rows,
-    );
+    ];
     $this->render($table);
     $this->assertNoRaw('class="odd"', 'Odd/even classes were not added because $no_striping = TRUE.');
     $this->assertNoRaw('no_striping', 'No invalid no_striping HTML attribute was printed.');
@@ -114,18 +114,18 @@ function testThemeTableWithNoStriping() {
    * Test that the 'footer' option works correctly.
    */
   function testThemeTableFooter() {
-    $footer = array(
-      array(
-        'data' => array(1),
-      ),
-      array('Foo'),
-    );
+    $footer = [
+      [
+        'data' => [1],
+      ],
+      ['Foo'],
+    ];
 
-    $table = array(
+    $table = [
       '#type' => 'table',
-      '#rows' => array(),
+      '#rows' => [],
       '#footer' => $footer,
-    );
+    ];
 
     $this->render($table);
     $this->removeWhiteSpace();
@@ -136,17 +136,17 @@ function testThemeTableFooter() {
    * Tests that the 'header' option in cells works correctly.
    */
   function testThemeTableHeaderCellOption() {
-    $rows = array(
-      array(
-        array('data' => 1, 'header' => TRUE),
-        array('data' => 1, 'header' => FALSE),
-        array('data' => 1),
-      ),
-    );
-    $table = array(
+    $rows = [
+      [
+        ['data' => 1, 'header' => TRUE],
+        ['data' => 1, 'header' => FALSE],
+        ['data' => 1],
+      ],
+    ];
+    $table = [
       '#type' => 'table',
       '#rows' => $rows,
-    );
+    ];
     $this->render($table);
     $this->removeWhiteSpace();
     $this->assertRaw('<th>1</th><td>1</td><td>1</td>', 'The th and td tags was printed correctly.');
@@ -156,14 +156,14 @@ function testThemeTableHeaderCellOption() {
    * Tests that the 'responsive-table' class is applied correctly.
    */
   public function testThemeTableResponsive() {
-    $header = array('one', 'two', 'three');
-    $rows = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));
-    $table = array(
+    $header = ['one', 'two', 'three'];
+    $rows = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#responsive' => TRUE,
-    );
+    ];
     $this->render($table);
     $this->assertRaw('responsive-enabled', 'The responsive-enabled class was printed correctly.');
   }
@@ -172,12 +172,12 @@ public function testThemeTableResponsive() {
    * Tests that the 'responsive-table' class is not applied without headers.
    */
   public function testThemeTableNotResponsiveHeaders() {
-    $rows = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));
-    $table = array(
+    $rows = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+    $table = [
       '#type' => 'table',
       '#rows' => $rows,
       '#responsive' => TRUE,
-    );
+    ];
     $this->render($table);
     $this->assertNoRaw('responsive-enabled', 'The responsive-enabled class is not applied without table headers.');
   }
@@ -186,14 +186,14 @@ public function testThemeTableNotResponsiveHeaders() {
    * Tests that 'responsive-table' class only applied when responsive is TRUE.
    */
   public function testThemeTableNotResponsiveProperty() {
-    $header = array('one', 'two', 'three');
-    $rows = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));
-    $table = array(
+    $header = ['one', 'two', 'three'];
+    $rows = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#responsive' => FALSE,
-    );
+    ];
     $this->render($table);
     $this->assertNoRaw('responsive-enabled', 'The responsive-enabled class is not applied without the "responsive" property set to TRUE.');
   }
@@ -202,21 +202,21 @@ public function testThemeTableNotResponsiveProperty() {
    * Tests 'priority-medium' and 'priority-low' classes.
    */
   public function testThemeTableResponsivePriority() {
-    $header = array(
+    $header = [
       // Test associative header indices.
-      'associative_key' => array('data' => 1, 'class' => array(RESPONSIVE_PRIORITY_MEDIUM)),
+      'associative_key' => ['data' => 1, 'class' => [RESPONSIVE_PRIORITY_MEDIUM]],
       // Test non-associative header indices.
-      array('data' => 2, 'class' => array(RESPONSIVE_PRIORITY_LOW)),
+      ['data' => 2, 'class' => [RESPONSIVE_PRIORITY_LOW]],
       // Test no responsive priorities.
-      array('data' => 3),
-    );
-    $rows = array(array(4, 5, 6));
-    $table = array(
+      ['data' => 3],
+    ];
+    $rows = [[4, 5, 6]];
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#responsive' => TRUE,
-    );
+    ];
     $this->render($table);
     $this->assertRaw('<th class="priority-medium">1</th>', 'Header 1: the priority-medium class was applied correctly.');
     $this->assertRaw('<th class="priority-low">2</th>', 'Header 2: the priority-low class was applied correctly.');
@@ -230,28 +230,28 @@ public function testThemeTableResponsivePriority() {
    * Tests header elements with a mix of string and render array values.
    */
   public function testThemeTableHeaderRenderArray() {
-    $header = array(
-      array (
-        'data' => array(
+    $header = [
+       [
+        'data' => [
           '#markup' => 'one',
-        ),
-      ),
+        ],
+      ],
       'two',
-      array (
-        'data' => array(
+       [
+        'data' => [
           '#type' => 'html_tag',
           '#tag' => 'b',
           '#value' => 'three',
-        ),
-      ),
-    );
-    $rows = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));
-    $table = array(
+        ],
+      ],
+    ];
+    $rows = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#responsive' => FALSE,
-    );
+    ];
     $this->render($table);
     $this->removeWhiteSpace();
     $this->assertRaw('<thead><tr><th>one</th><th>two</th><th><b>three</b></th></tr>', 'Table header found.');
@@ -261,37 +261,37 @@ public function testThemeTableHeaderRenderArray() {
    * Tests row elements with a mix of string and render array values.
    */
   public function testThemeTableRowRenderArray() {
-    $header = array('one', 'two', 'three');
-    $rows = array(
-      array(
+    $header = ['one', 'two', 'three'];
+    $rows = [
+      [
         '1-one',
-        array(
+        [
           'data' => '1-two'
-        ),
+        ],
         '1-three',
-      ),
-      array(
-        array (
-          'data' => array(
+      ],
+      [
+         [
+          'data' => [
             '#markup' => '2-one',
-          ),
-        ),
+          ],
+        ],
         '2-two',
-        array (
-          'data' => array(
+         [
+          'data' => [
             '#type' => 'html_tag',
             '#tag' => 'b',
             '#value' => '2-three',
-          ),
-        ),
-      ),
-    );
-    $table = array(
+          ],
+        ],
+      ],
+    ];
+    $table = [
       '#type' => 'table',
       '#header' => $header,
       '#rows' => $rows,
       '#responsive' => FALSE,
-    );
+    ];
     $this->render($table);
     $this->removeWhiteSpace();
     $this->assertRaw('<tbody><tr><td>1-one</td><td>1-two</td><td>1-three</td></tr>', 'Table row 1 found.');
diff --git a/core/tests/Drupal/KernelTests/Core/Render/RenderTest.php b/core/tests/Drupal/KernelTests/Core/Render/RenderTest.php
index 8860c19a1540df94bad2e24c587cfc8d480bab7d..88f993e72514300efc3ebf8903332019b8da1a23 100644
--- a/core/tests/Drupal/KernelTests/Core/Render/RenderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Render/RenderTest.php
@@ -16,7 +16,7 @@ class RenderTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'common_test');
+  public static $modules = ['system', 'common_test'];
 
   /**
    * Tests theme preprocess functions being able to attach assets.
diff --git a/core/tests/Drupal/KernelTests/Core/Routing/MatcherDumperTest.php b/core/tests/Drupal/KernelTests/Core/Routing/MatcherDumperTest.php
index 3998268f15624837eac857ef0c129b9b005dae8f..3054ecb165d21df7f73b03cf7e22854f823056b5 100644
--- a/core/tests/Drupal/KernelTests/Core/Routing/MatcherDumperTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Routing/MatcherDumperTest.php
@@ -125,9 +125,9 @@ public function testDump() {
 
     $this->fixtures->createTables($connection);
 
-    $dumper->dump(array('provider' => 'test'));
+    $dumper->dump(['provider' => 'test']);
 
-    $record = $connection->query("SELECT * FROM {test_routes} WHERE name= :name", array(':name' => 'test_route'))->fetchObject();
+    $record = $connection->query("SELECT * FROM {test_routes} WHERE name= :name", [':name' => 'test_route'])->fetchObject();
 
     $loaded_route = unserialize($record->route);
 
@@ -155,15 +155,15 @@ public function testMenuMasksGeneration() {
 
     $this->fixtures->createTables($connection);
 
-    $dumper->dump(array('provider' => 'test'));
+    $dumper->dump(['provider' => 'test']);
     // Using binary for readability, we expect a 0 at any wildcard slug. They
     // should be ordered from longest to shortest.
-    $expected = array(
+    $expected = [
       bindec('1011111'),
       bindec('10111'),
       bindec('111'),
       bindec('101'),
-    );
+    ];
     $this->assertEqual($this->state->get('routing.menu_masks.test_routes'), $expected);
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Routing/RouteProviderTest.php b/core/tests/Drupal/KernelTests/Core/Routing/RouteProviderTest.php
index 524587089fea8b92aae26c35a0f71b27195cf00e..835c812ca9297f5f87bcb0f54e85e02fdea1ec03 100644
--- a/core/tests/Drupal/KernelTests/Core/Routing/RouteProviderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Routing/RouteProviderTest.php
@@ -117,7 +117,7 @@ public function testCandidateOutlines() {
     $connection = Database::getConnection();
     $provider = new TestRouteProvider($connection, $this->state, $this->currentPath, $this->cache, $this->pathProcessor, $this->cacheTagsInvalidator, 'test_routes');
 
-    $parts = array('node', '5', 'edit');
+    $parts = ['node', '5', 'edit'];
 
     $candidates = $provider->getCandidateOutlines($parts);
 
@@ -335,9 +335,9 @@ function testOutlinePathMatchDefaults() {
     $this->fixtures->createTables($connection);
 
     $collection = new RouteCollection();
-    $collection->add('poink', new Route('/some/path/{value}', array(
+    $collection->add('poink', new Route('/some/path/{value}', [
       'value' => 'poink',
-    )));
+    ]));
 
     $dumper = new MatcherDumper($connection, $this->state, 'test_routes');
     $dumper->addRoutes($collection);
@@ -373,9 +373,9 @@ function testOutlinePathMatchDefaultsCollision() {
     $this->fixtures->createTables($connection);
 
     $collection = new RouteCollection();
-    $collection->add('poink', new Route('/some/path/{value}', array(
+    $collection->add('poink', new Route('/some/path/{value}', [
       'value' => 'poink',
-    )));
+    ]));
     $collection->add('narf', new Route('/some/path/here'));
 
     $dumper = new MatcherDumper($connection, $this->state, 'test_routes');
@@ -412,9 +412,9 @@ function testOutlinePathMatchDefaultsCollision2() {
     $this->fixtures->createTables($connection);
 
     $collection = new RouteCollection();
-    $collection->add('poink', new Route('/some/path/{value}', array(
+    $collection->add('poink', new Route('/some/path/{value}', [
       'value' => 'poink',
-    )));
+    ]));
     $collection->add('narf', new Route('/some/path/here'));
     $collection->add('eep', new Route('/something/completely/different'));
 
@@ -431,7 +431,7 @@ function testOutlinePathMatchDefaultsCollision2() {
       $routes_array = $routes->all();
 
       $this->assertEqual(count($routes), 2, 'The correct number of routes was found.');
-      $this->assertEqual(array('narf', 'poink'), array_keys($routes_array), 'Ensure the fitness was taken into account.');
+      $this->assertEqual(['narf', 'poink'], array_keys($routes_array), 'Ensure the fitness was taken into account.');
       $this->assertNotNull($routes->get('narf'), 'The first matching route was found.');
       $this->assertNotNull($routes->get('poink'), 'The second matching route was found.');
       $this->assertNull($routes->get('eep'), 'Non-matching route was not found.');
@@ -470,7 +470,7 @@ function testOutlinePathMatchDefaultsCollision3() {
       $routes_array = $routes->all();
 
       $this->assertEqual(count($routes), 2, 'The correct number of routes was found.');
-      $this->assertEqual(array('poink', 'poink2'), array_keys($routes_array), 'Ensure the fitness and name were taken into account in the sort.');
+      $this->assertEqual(['poink', 'poink2'], array_keys($routes_array), 'Ensure the fitness and name were taken into account in the sort.');
       $this->assertNotNull($routes->get('poink'), 'The first matching route was found.');
       $this->assertNotNull($routes->get('poink2'), 'The second matching route was found.');
       $this->assertNull($routes->get('eep'), 'Non-matching route was not found.');
@@ -631,7 +631,7 @@ public function testRouteByName() {
     }
     $this->assertTrue($exception_thrown, 'Random route was not found.');
 
-    $routes = $provider->getRoutesByNames(array('route_c', 'route_d', $this->randomMachineName()));
+    $routes = $provider->getRoutesByNames(['route_c', 'route_d', $this->randomMachineName()]);
     $this->assertEqual(count($routes), 2, 'Only two valid routes found.');
     $this->assertEqual($routes['route_c']->getPath(), '/path/two');
     $this->assertEqual($routes['route_d']->getPath(), '/path/three');
diff --git a/core/tests/Drupal/KernelTests/Core/Routing/UrlIntegrationTest.php b/core/tests/Drupal/KernelTests/Core/Routing/UrlIntegrationTest.php
index a70cc1fa38b227d310ba022b6adc3042599c971d..053db792cbb8493569a4041830a0376f8f8e14a5 100644
--- a/core/tests/Drupal/KernelTests/Core/Routing/UrlIntegrationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Routing/UrlIntegrationTest.php
@@ -19,7 +19,7 @@ class UrlIntegrationTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('user', 'router_test', 'system');
+  public static $modules = ['user', 'router_test', 'system'];
 
   /**
    * Ensures that the access() method on \Drupal\Core\Url objects works.
diff --git a/core/tests/Drupal/KernelTests/Core/ServiceProvider/ServiceProviderTest.php b/core/tests/Drupal/KernelTests/Core/ServiceProvider/ServiceProviderTest.php
index 2995c973ec388182fb0ca9f0e23da7d092988f99..011dfb70d80bd08947cc4055581de1c1599ddc08 100644
--- a/core/tests/Drupal/KernelTests/Core/ServiceProvider/ServiceProviderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/ServiceProvider/ServiceProviderTest.php
@@ -16,7 +16,7 @@ class ServiceProviderTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('file', 'service_provider_test', 'system');
+  public static $modules = ['file', 'service_provider_test', 'system'];
 
   /**
    * Tests that services provided by module service providers get registered to the DIC.
@@ -32,11 +32,11 @@ function testServiceProviderRegistration() {
    */
   function testServiceProviderRegistrationDynamic() {
     // Uninstall the module and ensure the service provider's service is not registered.
-    \Drupal::service('module_installer')->uninstall(array('service_provider_test'));
+    \Drupal::service('module_installer')->uninstall(['service_provider_test']);
     $this->assertFalse(\Drupal::hasService('service_provider_test_class'), 'The service_provider_test_class service does not exist in the DIC.');
 
     // Install the module and ensure the service provider's service is registered.
-    \Drupal::service('module_installer')->install(array('service_provider_test'));
+    \Drupal::service('module_installer')->install(['service_provider_test']);
     $this->assertTrue(\Drupal::hasService('service_provider_test_class'), 'The service_provider_test_class service exists in the DIC.');
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Session/AccountSwitcherTest.php b/core/tests/Drupal/KernelTests/Core/Session/AccountSwitcherTest.php
index 0e6fa8a7782207cfbbcee644a2af610491f8faa2..0492d773475c2eb24f5896b5a09a4620c3876135 100644
--- a/core/tests/Drupal/KernelTests/Core/Session/AccountSwitcherTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Session/AccountSwitcherTest.php
@@ -20,7 +20,7 @@ public function testAccountSwitching() {
     $original_session_saving = $session_handler->isSessionWritable();
 
     // Switch to user with uid 2.
-    $switcher->switchTo(new UserSession(array('uid' => 2)));
+    $switcher->switchTo(new UserSession(['uid' => 2]));
 
     // Verify that the active user has changed, and that session saving is
     // disabled.
@@ -28,7 +28,7 @@ public function testAccountSwitching() {
     $this->assertFalse($session_handler->isSessionWritable(), 'Session saving is disabled.');
 
     // Perform a second (nested) user account switch.
-    $switcher->switchTo(new UserSession(array('uid' => 3)));
+    $switcher->switchTo(new UserSession(['uid' => 3]));
     $this->assertEqual($user->id(), 3, 'Switched to user 3.');
 
     // Revert to the user session that was active between the first and second
diff --git a/core/tests/Drupal/KernelTests/Core/Site/SettingsRewriteTest.php b/core/tests/Drupal/KernelTests/Core/Site/SettingsRewriteTest.php
index 948236bc41c27fe92d35c324098e6cdb0a86723e..a015d07608a23288b5ff4521726c4866935bd749 100644
--- a/core/tests/Drupal/KernelTests/Core/Site/SettingsRewriteTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Site/SettingsRewriteTest.php
@@ -18,83 +18,83 @@ class SettingsRewriteTest extends KernelTestBase {
   function testDrupalRewriteSettings() {
     include_once \Drupal::root() . '/core/includes/install.inc';
     $site_path = $this->container->get('site.path');
-    $tests = array(
-      array(
+    $tests = [
+      [
         'original' => '$no_index_value_scalar = TRUE;',
-        'settings' => array(
-          'no_index_value_scalar' => (object) array(
+        'settings' => [
+          'no_index_value_scalar' => (object) [
             'value' => FALSE,
             'comment' => 'comment',
-          ),
-        ),
+          ],
+        ],
         'expected' => '$no_index_value_scalar = false; // comment',
-      ),
-      array(
+      ],
+      [
         'original' => '$no_index_value_scalar = TRUE;',
-        'settings' => array(
-          'no_index_value_foo' => array(
-            'foo' => array(
-              'value' => (object) array(
+        'settings' => [
+          'no_index_value_foo' => [
+            'foo' => [
+              'value' => (object) [
                 'value' => NULL,
                 'required' => TRUE,
                 'comment' => 'comment',
-              ),
-            ),
-          ),
-        ),
+              ],
+            ],
+          ],
+        ],
         'expected' => <<<'EXPECTED'
 $no_index_value_scalar = TRUE;
 $no_index_value_foo['foo']['value'] = NULL; // comment
 EXPECTED
-      ),
-      array(
+      ],
+      [
         'original' => '$no_index_value_array = array("old" => "value");',
-        'settings' => array(
-          'no_index_value_array' => (object) array(
+        'settings' => [
+          'no_index_value_array' => (object) [
             'value' => FALSE,
             'required' => TRUE,
             'comment' => 'comment',
-          ),
-        ),
+          ],
+        ],
         'expected' => '$no_index_value_array = array("old" => "value");
 $no_index_value_array = false; // comment',
-      ),
-      array(
+      ],
+      [
         'original' => '$has_index_value_scalar["foo"]["bar"] = NULL;',
-        'settings' => array(
-          'has_index_value_scalar' => array(
-            'foo' => array(
-              'bar' => (object) array(
+        'settings' => [
+          'has_index_value_scalar' => [
+            'foo' => [
+              'bar' => (object) [
                 'value' => FALSE,
                 'required' => TRUE,
                 'comment' => 'comment',
-              ),
-            ),
-          ),
-        ),
+              ],
+            ],
+          ],
+        ],
         'expected' => '$has_index_value_scalar["foo"]["bar"] = false; // comment',
-      ),
-      array(
+      ],
+      [
         'original' => '$has_index_value_scalar["foo"]["bar"] = "foo";',
-        'settings' => array(
-          'has_index_value_scalar' => array(
-            'foo' => array(
-              'value' => (object) array(
-                'value' => array('value' => 2),
+        'settings' => [
+          'has_index_value_scalar' => [
+            'foo' => [
+              'value' => (object) [
+                'value' => ['value' => 2],
                 'required' => TRUE,
                 'comment' => 'comment',
-              ),
-            ),
-          ),
-        ),
+              ],
+            ],
+          ],
+        ],
         'expected' => <<<'EXPECTED'
 $has_index_value_scalar["foo"]["bar"] = "foo";
 $has_index_value_scalar['foo']['value'] = array (
   'value' => 2,
 ); // comment
 EXPECTED
-      ),
-    );
+      ],
+    ];
     foreach ($tests as $test) {
       $filename = Settings::get('file_public_path', $site_path . '/files') . '/mock_settings.php';
       file_put_contents($filename, "<?php\n" . $test['original'] . "\n");
@@ -104,15 +104,15 @@ function testDrupalRewriteSettings() {
 
     // Test that <?php gets added to the start of an empty settings file.
     // Set the array of settings that will be written to the file.
-    $test = array(
-      'settings' => array(
-        'no_index' => (object) array(
+    $test = [
+      'settings' => [
+        'no_index' => (object) [
           'value' => TRUE,
           'required' => TRUE,
-        ),
-      ),
+        ],
+      ],
       'expected' => '$no_index = true;'
-    );
+    ];
     // Make an empty file.
     $filename = Settings::get('file_public_path', $site_path . '/files') . '/mock_settings.php';
     file_put_contents($filename, "");
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/ImageTest.php b/core/tests/Drupal/KernelTests/Core/Theme/ImageTest.php
index 51608ebdce9ec776498010ee4a82d044110e07d1..dd8ef7cc5520e08730bdc20890f184b7ccc449dd 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/ImageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/ImageTest.php
@@ -17,7 +17,7 @@ class ImageTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /*
    * The images to test with.
@@ -36,10 +36,10 @@ protected function setUp() {
     $this->container = \Drupal::service('kernel')->getContainer();
     $this->container->get('request_stack')->push($request);
 
-    $this->testImages = array(
+    $this->testImages = [
       'core/misc/druplicon.png',
       'core/misc/loading.gif',
-    );
+    ];
   }
 
   /**
@@ -48,7 +48,7 @@ protected function setUp() {
   function testThemeImageWithSizes() {
     // Test with multipliers.
     $sizes = '(max-width: ' . rand(10, 30) . 'em) 100vw, (max-width: ' . rand(30, 50) . 'em) 50vw, 30vw';
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#sizes' => $sizes,
       '#uri' => reset($this->testImages),
@@ -56,7 +56,7 @@ function testThemeImageWithSizes() {
       '#height' => rand(0, 500) . 'px',
       '#alt' => $this->randomMachineName(),
       '#title' => $this->randomMachineName(),
-    );
+    ];
     $this->render($image);
 
     // Make sure sizes is set.
@@ -68,14 +68,14 @@ function testThemeImageWithSizes() {
    */
   function testThemeImageWithSrc() {
 
-    $image = array(
+    $image = [
       '#theme' => 'image',
       '#uri' => reset($this->testImages),
       '#width' => rand(0, 1000) . 'px',
       '#height' => rand(0, 500) . 'px',
       '#alt' => $this->randomMachineName(),
       '#title' => $this->randomMachineName(),
-    );
+    ];
     $this->render($image);
 
     // Make sure the src attribute has the correct value.
@@ -87,23 +87,23 @@ function testThemeImageWithSrc() {
    */
   function testThemeImageWithSrcsetMultiplier() {
     // Test with multipliers.
-    $image = array(
+    $image = [
       '#theme' => 'image',
-      '#srcset' => array(
-        array(
+      '#srcset' => [
+        [
           'uri' => $this->testImages[0],
           'multiplier' => '1x',
-        ),
-        array(
+        ],
+        [
           'uri' => $this->testImages[1],
           'multiplier' => '2x',
-        ),
-      ),
+        ],
+      ],
       '#width' => rand(0, 1000) . 'px',
       '#height' => rand(0, 500) . 'px',
       '#alt' => $this->randomMachineName(),
       '#title' => $this->randomMachineName(),
-    );
+    ];
     $this->render($image);
 
     // Make sure the srcset attribute has the correct value.
@@ -115,27 +115,27 @@ function testThemeImageWithSrcsetMultiplier() {
    */
   function testThemeImageWithSrcsetWidth() {
     // Test with multipliers.
-    $widths = array(
+    $widths = [
       rand(0, 500) . 'w',
       rand(500, 1000) . 'w',
-    );
-    $image = array(
+    ];
+    $image = [
       '#theme' => 'image',
-      '#srcset' => array(
-        array(
+      '#srcset' => [
+        [
           'uri' => $this->testImages[0],
           'width' => $widths[0],
-        ),
-        array(
+        ],
+        [
           'uri' => $this->testImages[1],
           'width' => $widths[1],
-        ),
-      ),
+        ],
+      ],
       '#width' => rand(0, 1000) . 'px',
       '#height' => rand(0, 500) . 'px',
       '#alt' => $this->randomMachineName(),
       '#title' => $this->randomMachineName(),
-    );
+    ];
     $this->render($image);
 
     // Make sure the srcset attribute has the correct value.
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/MessageTest.php b/core/tests/Drupal/KernelTests/Core/Theme/MessageTest.php
index a9d61504668a7b71b09b2e1976edeb897a40a7ce..985a57ab98e016766eb267490daebc95a4ec5ada 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/MessageTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/MessageTest.php
@@ -14,7 +14,7 @@ class MessageTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Tests setting messages output.
@@ -26,9 +26,9 @@ function testMessages() {
 
     drupal_set_message('An error occurred', 'error');
     drupal_set_message('But then something nice happened');
-    $messages = array(
+    $messages = [
       '#type' => 'status_messages',
-    );
+    ];
     $this->render($messages);
     $this->assertRaw('messages messages--error');
     $this->assertRaw('messages messages--status');
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php b/core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php
index 97559e5ddd5f1ee1625561e22f5e6dde6b184a6a..bbd7342ba3657b0faf40dd527ef87267eb826f8c 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php
@@ -20,7 +20,7 @@ class RegistryTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('theme_test', 'system');
+  public static $modules = ['theme_test', 'system'];
 
   protected $profile = 'testing';
 
@@ -37,7 +37,7 @@ function testRaceCondition() {
     // entry to be written in __construct().
     $cache = \Drupal::cache();
     $lock_backend = \Drupal::lock();
-    $registry = new ThemeRegistry($cid, $cache, $lock_backend, array('theme_registry'), $this->container->get('module_handler')->isLoaded());
+    $registry = new ThemeRegistry($cid, $cache, $lock_backend, ['theme_registry'], $this->container->get('module_handler')->isLoaded());
 
     $this->assertTrue(\Drupal::cache()->get($cid), 'Cache entry was created.');
 
@@ -57,7 +57,7 @@ function testRaceCondition() {
     // Create a new instance of the class. Confirm that both the offset
     // requested previously, and one that has not yet been requested are both
     // available.
-    $registry = new ThemeRegistry($cid, $cache, $lock_backend, array('theme_registry'), $this->container->get('module_handler')->isLoaded());
+    $registry = new ThemeRegistry($cid, $cache, $lock_backend, ['theme_registry'], $this->container->get('module_handler')->isLoaded());
     $this->assertTrue($registry->get('theme_test_template_test'), 'Offset was returned correctly from the theme registry');
     $this->assertTrue($registry->get('theme_test_template_test_2'), 'Offset was returned correctly from the theme registry');
   }
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php b/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
index f3e2ade0e1eb5f7ad5771e1f972943572de02f60..cbaf0a3d20eae64eaa665a0a438e6d0e427f39d3 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
@@ -18,7 +18,7 @@ class ThemeInstallerTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * {@inheritdoc}
@@ -33,7 +33,7 @@ public function register(ContainerBuilder $container) {
 
   protected function setUp() {
     parent::setUp();
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
   }
 
   /**
@@ -61,7 +61,7 @@ function testInstall() {
     $themes = $this->themeHandler()->listInfo();
     $this->assertFalse(isset($themes[$name]));
 
-    $this->themeInstaller()->install(array($name));
+    $this->themeInstaller()->install([$name]);
 
     $this->assertIdentical($this->extensionConfig()->get("theme.$name"), 0);
 
@@ -87,13 +87,13 @@ function testInstallSubTheme() {
     $themes = $this->themeHandler()->listInfo();
     $this->assertFalse(array_keys($themes));
 
-    $this->themeInstaller()->install(array($name));
+    $this->themeInstaller()->install([$name]);
 
     $themes = $this->themeHandler()->listInfo();
     $this->assertTrue(isset($themes[$name]));
     $this->assertTrue(isset($themes[$base_name]));
 
-    $this->themeInstaller()->uninstall(array($name));
+    $this->themeInstaller()->uninstall([$name]);
 
     $themes = $this->themeHandler()->listInfo();
     $this->assertFalse(isset($themes[$name]));
@@ -111,7 +111,7 @@ function testInstallNonExisting() {
 
     try {
       $message = 'ThemeHandler::install() throws InvalidArgumentException upon installing a non-existing theme.';
-      $this->themeInstaller()->install(array($name));
+      $this->themeInstaller()->install([$name]);
       $this->fail($message);
     }
     catch (\InvalidArgumentException $e) {
@@ -130,7 +130,7 @@ function testInstallNameTooLong() {
 
     try {
       $message = 'ThemeHandler::install() throws ExtensionNameLengthException upon installing a theme with a too long name.';
-      $this->themeInstaller()->install(array($name));
+      $this->themeInstaller()->install([$name]);
       $this->fail($message);
     }
     catch (ExtensionNameLengthException $e) {
@@ -144,7 +144,7 @@ function testInstallNameTooLong() {
   function testUninstallDefault() {
     $name = 'stark';
     $other_name = 'bartik';
-    $this->themeInstaller()->install(array($name, $other_name));
+    $this->themeInstaller()->install([$name, $other_name]);
     $this->config('system.theme')->set('default', $name)->save();
 
     $themes = $this->themeHandler()->listInfo();
@@ -153,7 +153,7 @@ function testUninstallDefault() {
 
     try {
       $message = 'ThemeHandler::uninstall() throws InvalidArgumentException upon disabling default theme.';
-      $this->themeHandler()->uninstall(array($name));
+      $this->themeHandler()->uninstall([$name]);
       $this->fail($message);
     }
     catch (\InvalidArgumentException $e) {
@@ -171,7 +171,7 @@ function testUninstallDefault() {
   function testUninstallAdmin() {
     $name = 'stark';
     $other_name = 'bartik';
-    $this->themeInstaller()->install(array($name, $other_name));
+    $this->themeInstaller()->install([$name, $other_name]);
     $this->config('system.theme')->set('admin', $name)->save();
 
     $themes = $this->themeHandler()->listInfo();
@@ -180,7 +180,7 @@ function testUninstallAdmin() {
 
     try {
       $message = 'ThemeHandler::uninstall() throws InvalidArgumentException upon disabling admin theme.';
-      $this->themeHandler()->uninstall(array($name));
+      $this->themeHandler()->uninstall([$name]);
       $this->fail($message);
     }
     catch (\InvalidArgumentException $e) {
@@ -199,8 +199,8 @@ function testUninstallSubTheme() {
     $name = 'test_subtheme';
     $base_name = 'test_basetheme';
 
-    $this->themeInstaller()->install(array($name));
-    $this->themeInstaller()->uninstall(array($name));
+    $this->themeInstaller()->install([$name]);
+    $this->themeInstaller()->uninstall([$name]);
 
     $themes = $this->themeHandler()->listInfo();
     $this->assertFalse(isset($themes[$name]));
@@ -214,11 +214,11 @@ function testUninstallBaseBeforeSubTheme() {
     $name = 'test_basetheme';
     $sub_name = 'test_subtheme';
 
-    $this->themeInstaller()->install(array($sub_name));
+    $this->themeInstaller()->install([$sub_name]);
 
     try {
       $message = 'ThemeHandler::install() throws InvalidArgumentException upon uninstalling base theme before sub theme.';
-      $this->themeInstaller()->uninstall(array($name));
+      $this->themeInstaller()->uninstall([$name]);
       $this->fail($message);
     }
     catch (\InvalidArgumentException $e) {
@@ -230,7 +230,7 @@ function testUninstallBaseBeforeSubTheme() {
     $this->assertTrue(isset($themes[$sub_name]));
 
     // Verify that uninstalling both at the same time works.
-    $this->themeInstaller()->uninstall(array($name, $sub_name));
+    $this->themeInstaller()->uninstall([$name, $sub_name]);
 
     $themes = $this->themeHandler()->listInfo();
     $this->assertFalse(isset($themes[$name]));
@@ -248,7 +248,7 @@ function testUninstallNonExisting() {
 
     try {
       $message = 'ThemeHandler::uninstall() throws InvalidArgumentException upon uninstalling a non-existing theme.';
-      $this->themeInstaller()->uninstall(array($name));
+      $this->themeInstaller()->uninstall([$name]);
       $this->fail($message);
     }
     catch (\InvalidArgumentException $e) {
@@ -265,10 +265,10 @@ function testUninstallNonExisting() {
   function testUninstall() {
     $name = 'test_basetheme';
 
-    $this->themeInstaller()->install(array($name));
+    $this->themeInstaller()->install([$name]);
     $this->assertTrue($this->config("$name.settings")->get());
 
-    $this->themeInstaller()->uninstall(array($name));
+    $this->themeInstaller()->uninstall([$name]);
 
     $this->assertFalse(array_keys($this->themeHandler()->listInfo()));
     $this->assertFalse(array_keys(system_list('theme')));
@@ -276,7 +276,7 @@ function testUninstall() {
     $this->assertFalse($this->config("$name.settings")->get());
 
     // Ensure that the uninstalled theme can be installed again.
-    $this->themeInstaller()->install(array($name));
+    $this->themeInstaller()->install([$name]);
     $themes = $this->themeHandler()->listInfo();
     $this->assertTrue(isset($themes[$name]));
     $this->assertEqual($themes[$name]->getName(), $name);
@@ -292,7 +292,7 @@ function testUninstallNotInstalled() {
 
     try {
       $message = 'ThemeHandler::uninstall() throws InvalidArgumentException upon uninstalling a theme that is not installed.';
-      $this->themeInstaller()->uninstall(array($name));
+      $this->themeInstaller()->uninstall([$name]);
       $this->fail($message);
     }
     catch (\InvalidArgumentException $e) {
@@ -309,7 +309,7 @@ function testThemeInfoAlter() {
     $name = 'seven';
     $this->container->get('state')->set('module_test.hook_system_info_alter', TRUE);
 
-    $this->themeInstaller()->install(array($name));
+    $this->themeInstaller()->install([$name]);
 
     $themes = $this->themeHandler()->listInfo();
     $this->assertFalse(isset($themes[$name]->info['regions']['test_region']));
@@ -317,7 +317,7 @@ function testThemeInfoAlter() {
     // Rebuild module data so we know where module_test is located.
     // @todo Remove as part of https://www.drupal.org/node/2186491
     system_rebuild_module_data();
-    $this->moduleInstaller()->install(array('module_test'), FALSE);
+    $this->moduleInstaller()->install(['module_test'], FALSE);
     $this->assertTrue($this->moduleHandler()->moduleExists('module_test'));
 
     $themes = $this->themeHandler()->listInfo();
@@ -333,7 +333,7 @@ function testThemeInfoAlter() {
     $system_list = system_list('theme');
     $this->assertTrue(isset($system_list[$name]->info['regions']['test_region']));
 
-    $this->moduleInstaller()->uninstall(array('module_test'));
+    $this->moduleInstaller()->uninstall(['module_test']);
     $this->assertFalse($this->moduleHandler()->moduleExists('module_test'));
 
     $themes = $this->themeHandler()->listInfo();
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/ThemeSettingsTest.php b/core/tests/Drupal/KernelTests/Core/Theme/ThemeSettingsTest.php
index 6c2dfb39f07786c6e6ee5b36ea24c619bdefb4ca..d74df1422a7421af046f91365aa31f8deb220d0f 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/ThemeSettingsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/ThemeSettingsTest.php
@@ -18,7 +18,7 @@ class ThemeSettingsTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * List of discovered themes.
@@ -30,7 +30,7 @@ class ThemeSettingsTest extends KernelTestBase {
   protected function setUp() {
     parent::setUp();
     // Theme settings rely on System module's system.theme.global configuration.
-    $this->installConfig(array('system'));
+    $this->installConfig(['system']);
 
     if (!isset($this->availableThemes)) {
       $discovery = new ExtensionDiscovery(\Drupal::root());
@@ -45,7 +45,7 @@ function testDefaultConfig() {
     $name = 'test_basetheme';
     $path = $this->availableThemes[$name]->getPath();
     $this->assertTrue(file_exists("$path/" . InstallStorage::CONFIG_INSTALL_DIRECTORY . "/$name.settings.yml"));
-    $this->container->get('theme_handler')->install(array($name));
+    $this->container->get('theme_handler')->install([$name]);
     $this->assertIdentical(theme_get_setting('base', $name), 'only');
   }
 
@@ -56,7 +56,7 @@ function testNoDefaultConfig() {
     $name = 'stark';
     $path = $this->availableThemes[$name]->getPath();
     $this->assertFalse(file_exists("$path/" . InstallStorage::CONFIG_INSTALL_DIRECTORY . "/$name.settings.yml"));
-    $this->container->get('theme_handler')->install(array($name));
+    $this->container->get('theme_handler')->install([$name]);
     $this->assertNotNull(theme_get_setting('features.favicon', $name));
   }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/TwigEnvironmentTest.php b/core/tests/Drupal/KernelTests/Core/Theme/TwigEnvironmentTest.php
index ba7a3cd8acc9fb8c9b637ee234043558e990f667..5d6f61f205be8a4dd088e38a40cdef9c0a9a5d2d 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/TwigEnvironmentTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/TwigEnvironmentTest.php
@@ -21,7 +21,7 @@ class TwigEnvironmentTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system');
+  public static $modules = ['system'];
 
   /**
    * Tests inline templates.
@@ -32,15 +32,15 @@ public function testInlineTemplate() {
     /** @var \Drupal\Core\Template\TwigEnvironment $environment */
     $environment = \Drupal::service('twig');
     $this->assertEqual($environment->renderInline('test-no-context'), 'test-no-context');
-    $this->assertEqual($environment->renderInline('test-with-context {{ llama }}', array('llama' => 'muuh')), 'test-with-context muuh');
+    $this->assertEqual($environment->renderInline('test-with-context {{ llama }}', ['llama' => 'muuh']), 'test-with-context muuh');
 
-    $element = array();
+    $element = [];
     $unsafe_string = '<script>alert(\'Danger! High voltage!\');</script>';
-    $element['test'] = array(
+    $element['test'] = [
       '#type' => 'inline_template',
       '#template' => 'test-with-context <label>{{ unsafe_content }}</label>',
-      '#context' => array('unsafe_content' => $unsafe_string),
-    );
+      '#context' => ['unsafe_content' => $unsafe_string],
+    ];
     $this->assertEqual($renderer->renderRoot($element), 'test-with-context <label>' . Html::escape($unsafe_string) . '</label>');
 
     // Enable twig_auto_reload and twig_debug.
@@ -52,12 +52,12 @@ public function testInlineTemplate() {
     $this->container = \Drupal::service('kernel')->rebuildContainer();
     \Drupal::setContainer($this->container);
 
-    $element = array();
-    $element['test'] = array(
+    $element = [];
+    $element['test'] = [
       '#type' => 'inline_template',
       '#template' => 'test-with-context {{ llama }}',
-      '#context' => array('llama' => 'muuh'),
-    );
+      '#context' => ['llama' => 'muuh'],
+    ];
     $element_copy = $element;
     // Render it twice so that twig caching is triggered.
     $this->assertEqual($renderer->renderRoot($element), 'test-with-context muuh');
@@ -101,7 +101,7 @@ public function testTemplateNotFoundException() {
     $environment = \Drupal::service('twig');
 
     try {
-      $environment->loadTemplate('this-template-does-not-exist.html.twig')->render(array());
+      $environment->loadTemplate('this-template-does-not-exist.html.twig')->render([]);
       $this->fail('Did not throw an exception as expected.');
     }
     catch (\Twig_Error_Loader $e) {
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php b/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
index 2e6e5a402886501fe0a0946dacc56b4a276b93a8..d30d2de13d370c024b169e7a64f1565a79baa51a 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
@@ -90,7 +90,7 @@ protected function renderObjectWithTwig($variable) {
       $elements = [
         '#type' => 'inline_template',
         '#template' => '{%- if variable is not empty -%}<span>{{ variable }}</span>{%- endif -%}',
-        '#context' => array('variable' => $variable),
+        '#context' => ['variable' => $variable],
       ];
       return $renderer->render($elements);
     });
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/TwigWhiteListTest.php b/core/tests/Drupal/KernelTests/Core/Theme/TwigWhiteListTest.php
index 41984d6658adc279023b83634aa8b69c5faa04f8..f0bbb82a86e6b187f0a02bb4258210422abc7995 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/TwigWhiteListTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/TwigWhiteListTest.php
@@ -42,7 +42,7 @@ class TwigWhiteListTest extends KernelTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->installSchema('system', array('sequences'));
+    $this->installSchema('system', ['sequences']);
     $this->installEntitySchema('node');
     $this->installEntitySchema('user');
     $this->installEntitySchema('taxonomy_term');
@@ -71,38 +71,38 @@ protected function setUp() {
     $this->term->save();
 
     // Create a field.
-    $handler_settings = array(
-      'target_bundles' => array(
+    $handler_settings = [
+      'target_bundles' => [
         $vocabulary->id() => $vocabulary->id(),
-      ),
+      ],
       'auto_create' => TRUE,
-    );
+    ];
     // Add the term field.
-    FieldStorageConfig::create(array(
+    FieldStorageConfig::create([
       'field_name' => 'field_term',
       'type' => 'entity_reference',
       'entity_type' => 'node',
       'cardinality' => 1,
-      'settings' => array(
+      'settings' => [
         'target_type' => 'taxonomy_term',
-      ),
-    ))->save();
-    FieldConfig::create(array(
+      ],
+    ])->save();
+    FieldConfig::create([
       'field_name' => 'field_term',
       'entity_type' => 'node',
       'bundle' => 'page',
       'label' => 'Terms',
-      'settings' => array(
+      'settings' => [
         'handler' => 'default',
         'handler_settings' => $handler_settings,
-      ),
-    ))->save();
+      ],
+    ])->save();
 
     // Show on default display and teaser.
     entity_get_display('node', 'page', 'default')
-      ->setComponent('field_term', array(
+      ->setComponent('field_term', [
         'type' => 'entity_reference_label',
-      ))
+      ])
       ->save();
     // Boot twig environment.
     $this->twig = \Drupal::service('twig');
diff --git a/core/tests/Drupal/KernelTests/Core/TypedData/AllowedValuesConstraintValidatorTest.php b/core/tests/Drupal/KernelTests/Core/TypedData/AllowedValuesConstraintValidatorTest.php
index 4a23fbbc96cfc48288ba7ca89f8b640611fa093a..05a36ba2e96bdcb8b61b561cea25628982ef6b16 100644
--- a/core/tests/Drupal/KernelTests/Core/TypedData/AllowedValuesConstraintValidatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/TypedData/AllowedValuesConstraintValidatorTest.php
@@ -32,7 +32,7 @@ protected function setUp() {
   public function testValidation() {
     // Create a definition that specifies some AllowedValues.
     $definition = DataDefinition::create('integer')
-      ->addConstraint('AllowedValues', array(1, 2, 3));
+      ->addConstraint('AllowedValues', [1, 2, 3]);
 
     // Test the validation.
     $typed_data = $this->typedData->create($definition, 1);
diff --git a/core/tests/Drupal/KernelTests/Core/TypedData/ComplexDataConstraintValidatorTest.php b/core/tests/Drupal/KernelTests/Core/TypedData/ComplexDataConstraintValidatorTest.php
index 078cb7a79f8ea4042a1d7a1053ba0902b05987d4..bbdf10992f3097adae9ce9a50b2ef04ba25d1f67 100644
--- a/core/tests/Drupal/KernelTests/Core/TypedData/ComplexDataConstraintValidatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/TypedData/ComplexDataConstraintValidatorTest.php
@@ -35,19 +35,19 @@ public function testValidation() {
     // Create a definition that specifies some ComplexData constraint.
     $definition = MapDataDefinition::create()
       ->setPropertyDefinition('key', DataDefinition::create('integer'))
-      ->addConstraint('ComplexData', array(
-        'key' => array(
-          'AllowedValues' => array(1, 2, 3)
-        ),
-      ));
+      ->addConstraint('ComplexData', [
+        'key' => [
+          'AllowedValues' => [1, 2, 3]
+        ],
+      ]);
 
     // Test the validation.
-    $typed_data = $this->typedData->create($definition, array('key' => 1));
+    $typed_data = $this->typedData->create($definition, ['key' => 1]);
     $violations = $typed_data->validate();
     $this->assertEqual($violations->count(), 0, 'Validation passed for correct value.');
 
     // Test the validation when an invalid value is passed.
-    $typed_data = $this->typedData->create($definition, array('key' => 4));
+    $typed_data = $this->typedData->create($definition, ['key' => 4]);
     $violations = $typed_data->validate();
     $this->assertEqual($violations->count(), 1, 'Validation failed for incorrect value.');
 
@@ -59,19 +59,19 @@ public function testValidation() {
 
     // Test using the constraint with a map without the specified key. This
     // should be ignored as long as there is no NotNull or NotBlank constraint.
-    $typed_data = $this->typedData->create($definition, array('foo' => 'bar'));
+    $typed_data = $this->typedData->create($definition, ['foo' => 'bar']);
     $violations = $typed_data->validate();
     $this->assertEqual($violations->count(), 0, 'Constraint on non-existing key is ignored.');
 
     $definition = MapDataDefinition::create()
       ->setPropertyDefinition('key', DataDefinition::create('integer'))
-      ->addConstraint('ComplexData', array(
-        'key' => array(
-          'NotNull' => array()
-        ),
-      ));
+      ->addConstraint('ComplexData', [
+        'key' => [
+          'NotNull' => []
+        ],
+      ]);
 
-    $typed_data = $this->typedData->create($definition, array('foo' => 'bar'));
+    $typed_data = $this->typedData->create($definition, ['foo' => 'bar']);
     $violations = $typed_data->validate();
     $this->assertEqual($violations->count(), 1, 'Key is required.');
   }
diff --git a/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataDefinitionTest.php b/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataDefinitionTest.php
index 4ff9ff6da1097ea236adbc80cce9c64a69f6e304..8aeab575e924fc4541bc8efca6bc5b61c1ba149e 100644
--- a/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataDefinitionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataDefinitionTest.php
@@ -66,7 +66,7 @@ public function testMaps() {
     $this->assertTrue($map_definition instanceof ComplexDataDefinitionInterface);
 
     // Test retrieving metadata about contained properties.
-    $this->assertEqual(array_keys($map_definition->getPropertyDefinitions()), array('one', 'two', 'three'));
+    $this->assertEqual(array_keys($map_definition->getPropertyDefinitions()), ['one', 'two', 'three']);
     $this->assertEqual($map_definition->getPropertyDefinition('one')->getDataType(), 'string');
     $this->assertNull($map_definition->getMainPropertyName());
     $this->assertNull($map_definition->getPropertyDefinition('invalid'));
diff --git a/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataTest.php b/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataTest.php
index 08f27b3689437517b6e2bcdb33a6dfbba00d2d4a..c79f2cfc9f4d14df0854426d5ff3a0a8a9e46a97 100644
--- a/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataTest.php
+++ b/core/tests/Drupal/KernelTests/Core/TypedData/TypedDataTest.php
@@ -38,7 +38,7 @@ class TypedDataTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = array('system', 'field', 'file', 'user');
+  public static $modules = ['system', 'field', 'file', 'user'];
 
   protected function setUp() {
     parent::setup();
@@ -66,7 +66,7 @@ protected function createTypedData($definition, $value = NULL, $name = NULL) {
    */
   public function testGetAndSet() {
     // Boolean type.
-    $typed_data = $this->createTypedData(array('type' => 'boolean'), TRUE);
+    $typed_data = $this->createTypedData(['type' => 'boolean'], TRUE);
     $this->assertTrue($typed_data instanceof BooleanInterface, 'Typed data object is an instance of BooleanInterface.');
     $this->assertTrue($typed_data->getValue() === TRUE, 'Boolean value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -82,7 +82,7 @@ public function testGetAndSet() {
 
     // String type.
     $value = $this->randomString();
-    $typed_data = $this->createTypedData(array('type' => 'string'), $value);
+    $typed_data = $this->createTypedData(['type' => 'string'], $value);
     $this->assertTrue($typed_data instanceof StringInterface, 'Typed data object is an instance of StringInterface.');
     $this->assertTrue($typed_data->getValue() === $value, 'String value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -95,12 +95,12 @@ public function testGetAndSet() {
     $typed_data->setValue(NULL);
     $this->assertNull($typed_data->getValue(), 'String wrapper is null-able.');
     $this->assertEqual($typed_data->validate()->count(), 0);
-    $typed_data->setValue(array('no string'));
+    $typed_data->setValue(['no string']);
     $this->assertEqual($typed_data->validate()->count(), 1, 'Validation detected invalid value.');
 
     // Integer type.
     $value = rand();
-    $typed_data = $this->createTypedData(array('type' => 'integer'), $value);
+    $typed_data = $this->createTypedData(['type' => 'integer'], $value);
     $this->assertTrue($typed_data instanceof IntegerInterface, 'Typed data object is an instance of IntegerInterface.');
     $this->assertTrue($typed_data->getValue() === $value, 'Integer value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -117,7 +117,7 @@ public function testGetAndSet() {
 
     // Float type.
     $value = 123.45;
-    $typed_data = $this->createTypedData(array('type' => 'float'), $value);
+    $typed_data = $this->createTypedData(['type' => 'float'], $value);
     $this->assertTrue($typed_data instanceof FloatInterface, 'Typed data object is an instance of FloatInterface.');
     $this->assertTrue($typed_data->getValue() === $value, 'Float value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -134,7 +134,7 @@ public function testGetAndSet() {
 
     // Date Time type.
     $value = '2014-01-01T20:00:00+00:00';
-    $typed_data = $this->createTypedData(array('type' => 'datetime_iso8601'), $value);
+    $typed_data = $this->createTypedData(['type' => 'datetime_iso8601'], $value);
     $this->assertTrue($typed_data instanceof DateTimeInterface, 'Typed data object is an instance of DateTimeInterface.');
     $this->assertTrue($typed_data->getValue() == $value, 'Date value was fetched.');
     $this->assertEqual($typed_data->getValue(), $typed_data->getDateTime()->format('c'), 'Value representation of a date is ISO 8601');
@@ -151,7 +151,7 @@ public function testGetAndSet() {
     $typed_data->setValue('invalid');
     $this->assertEqual($typed_data->validate()->count(), 1, 'Validation detected invalid value.');
     // Check implementation of DateTimeInterface.
-    $typed_data = $this->createTypedData(array('type' => 'datetime_iso8601'), '2014-01-01T20:00:00+00:00');
+    $typed_data = $this->createTypedData(['type' => 'datetime_iso8601'], '2014-01-01T20:00:00+00:00');
     $this->assertTrue($typed_data->getDateTime() instanceof DrupalDateTime);
     $typed_data->setDateTime(new DrupalDateTime('2014-01-02T20:00:00+00:00'));
     $this->assertEqual($typed_data->getValue(), '2014-01-02T20:00:00+00:00');
@@ -160,7 +160,7 @@ public function testGetAndSet() {
 
     // Timestamp type.
     $value = REQUEST_TIME;
-    $typed_data = $this->createTypedData(array('type' => 'timestamp'), $value);
+    $typed_data = $this->createTypedData(['type' => 'timestamp'], $value);
     $this->assertTrue($typed_data instanceof DateTimeInterface, 'Typed data object is an instance of DateTimeInterface.');
     $this->assertTrue($typed_data->getValue() == $value, 'Timestamp value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -174,7 +174,7 @@ public function testGetAndSet() {
     $typed_data->setValue('invalid');
     $this->assertEqual($typed_data->validate()->count(), 1, 'Validation detected invalid value.');
     // Check implementation of DateTimeInterface.
-    $typed_data = $this->createTypedData(array('type' => 'timestamp'), REQUEST_TIME);
+    $typed_data = $this->createTypedData(['type' => 'timestamp'], REQUEST_TIME);
     $this->assertTrue($typed_data->getDateTime() instanceof DrupalDateTime);
     $typed_data->setDateTime(DrupalDateTime::createFromTimestamp(REQUEST_TIME + 1));
     $this->assertEqual($typed_data->getValue(), REQUEST_TIME + 1);
@@ -183,7 +183,7 @@ public function testGetAndSet() {
 
     // DurationIso8601 type.
     $value = 'PT20S';
-    $typed_data = $this->createTypedData(array('type' => 'duration_iso8601'), $value);
+    $typed_data = $this->createTypedData(['type' => 'duration_iso8601'], $value);
     $this->assertTrue($typed_data instanceof DurationInterface, 'Typed data object is an instance of DurationInterface.');
     $this->assertIdentical($typed_data->getValue(), $value, 'DurationIso8601 value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -197,7 +197,7 @@ public function testGetAndSet() {
     $typed_data->setValue('invalid');
     $this->assertEqual($typed_data->validate()->count(), 1, 'Validation detected invalid value.');
     // Check implementation of DurationInterface.
-    $typed_data = $this->createTypedData(array('type' => 'duration_iso8601'), 'PT20S');
+    $typed_data = $this->createTypedData(['type' => 'duration_iso8601'], 'PT20S');
     $this->assertTrue($typed_data->getDuration() instanceof \DateInterval);
     $typed_data->setDuration(new \DateInterval('P40D'));
     // @todo: Should we make this "nicer"?
@@ -207,7 +207,7 @@ public function testGetAndSet() {
 
     // Time span type.
     $value = 20;
-    $typed_data = $this->createTypedData(array('type' => 'timespan'), $value);
+    $typed_data = $this->createTypedData(['type' => 'timespan'], $value);
     $this->assertTrue($typed_data instanceof DurationInterface, 'Typed data object is an instance of DurationInterface.');
     $this->assertIdentical($typed_data->getValue(), $value, 'Time span value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -221,7 +221,7 @@ public function testGetAndSet() {
     $typed_data->setValue('invalid');
     $this->assertEqual($typed_data->validate()->count(), 1, 'Validation detected invalid value.');
     // Check implementation of DurationInterface.
-    $typed_data = $this->createTypedData(array('type' => 'timespan'), 20);
+    $typed_data = $this->createTypedData(['type' => 'timespan'], 20);
     $this->assertTrue($typed_data->getDuration() instanceof \DateInterval);
     $typed_data->setDuration(new \DateInterval('PT4H'));
     $this->assertEqual($typed_data->getValue(), 60 * 60 * 4);
@@ -230,7 +230,7 @@ public function testGetAndSet() {
 
     // URI type.
     $uri = 'http://example.com/foo/';
-    $typed_data = $this->createTypedData(array('type' => 'uri'), $uri);
+    $typed_data = $this->createTypedData(['type' => 'uri'], $uri);
     $this->assertTrue($typed_data instanceof UriInterface, 'Typed data object is an instance of UriInterface.');
     $this->assertTrue($typed_data->getValue() === $uri, 'URI value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -247,7 +247,7 @@ public function testGetAndSet() {
     $this->assertEqual($typed_data->validate()->count(), 0, 'Filename with spaces is valid.');
 
     // Generate some files that will be used to test the binary data type.
-    $files = array();
+    $files = [];
     for ($i = 0; $i < 3; $i++) {
       $path = "public://example_$i.png";
       file_unmanaged_copy(\Drupal::root() . '/core/misc/druplicon.png', $path);
@@ -258,7 +258,7 @@ public function testGetAndSet() {
 
     // Email type.
     $value = $this->randomString();
-    $typed_data = $this->createTypedData(array('type' => 'email'), $value);
+    $typed_data = $this->createTypedData(['type' => 'email'], $value);
     $this->assertTrue($typed_data instanceof StringInterface, 'Typed data object is an instance of StringInterface.');
     $this->assertIdentical($typed_data->getValue(), $value, 'Email value was fetched.');
     $new_value = 'test@example.com';
@@ -273,7 +273,7 @@ public function testGetAndSet() {
     $this->assertEqual($typed_data->validate()->count(), 1, 'Validation detected invalid value.');
 
     // Binary type.
-    $typed_data = $this->createTypedData(array('type' => 'binary'), $files[0]->getFileUri());
+    $typed_data = $this->createTypedData(['type' => 'binary'], $files[0]->getFileUri());
     $this->assertTrue($typed_data instanceof BinaryInterface, 'Typed data object is an instance of BinaryInterface.');
     $this->assertTrue(is_resource($typed_data->getValue()), 'Binary value was fetched.');
     $this->assertEqual($typed_data->validate()->count(), 0);
@@ -294,8 +294,8 @@ public function testGetAndSet() {
     $this->assertEqual($typed_data->validate()->count(), 1, 'Validation detected invalid value.');
 
     // Any type.
-    $value = array('foo');
-    $typed_data = $this->createTypedData(array('type' => 'any'), $value);
+    $value = ['foo'];
+    $typed_data = $this->createTypedData(['type' => 'any'], $value);
     $this->assertIdentical($typed_data->getValue(), $value, 'Any value was fetched.');
     $new_value = 'test@example.com';
     $typed_data->setValue($new_value);
@@ -307,9 +307,9 @@ public function testGetAndSet() {
     $this->assertEqual($typed_data->validate()->count(), 0);
     // We cannot test invalid values as everything is valid for the any type,
     // but make sure an array or object value passes validation also.
-    $typed_data->setValue(array('entry'));
+    $typed_data->setValue(['entry']);
     $this->assertEqual($typed_data->validate()->count(), 0);
-    $typed_data->setValue((object) array('entry'));
+    $typed_data->setValue((object) ['entry']);
     $this->assertEqual($typed_data->validate()->count(), 0);
   }
 
@@ -318,7 +318,7 @@ public function testGetAndSet() {
    */
   public function testTypedDataLists() {
     // Test working with an existing list of strings.
-    $value = array('one', 'two', 'three');
+    $value = ['one', 'two', 'three'];
     $typed_data = $this->createTypedData(ListDataDefinition::create('string'), $value);
     $this->assertEqual($typed_data->getValue(), $value, 'List value has been set.');
     // Test iterating.
@@ -347,14 +347,14 @@ public function testTypedDataLists() {
     $clone = clone $typed_data;
     $this->assertTrue($typed_data->getValue() === $clone->getValue());
     $this->assertTrue($typed_data[0] !== $clone[0]);
-    $clone->setValue(array());
+    $clone->setValue([]);
     $this->assertTrue($clone->isEmpty());
 
     // Make sure that resetting the value using NULL results in an empty array.
-    $clone->setValue(array());
+    $clone->setValue([]);
     $typed_data->setValue(NULL);
-    $this->assertIdentical($typed_data->getValue(), array());
-    $this->assertIdentical($clone->getValue(), array());
+    $this->assertIdentical($typed_data->getValue(), []);
+    $this->assertIdentical($clone->getValue(), []);
 
     // Test dealing with NULL items.
     $typed_data[] = NULL;
@@ -367,7 +367,7 @@ public function testTypedDataLists() {
     $this->assertFalse($typed_data->isEmpty());
     $this->assertEqual(count($typed_data), 3);
 
-    $this->assertEqual($typed_data->getValue(), array(NULL, '', 'three'));
+    $this->assertEqual($typed_data->getValue(), [NULL, '', 'three']);
     // Test unsetting.
     unset($typed_data[1]);
     $this->assertEqual(count($typed_data), 2);
@@ -379,7 +379,7 @@ public function testTypedDataLists() {
     $this->assertEqual(count($typed_data), 2);
 
     // Test setting the list with less values.
-    $typed_data->setValue(array('one'));
+    $typed_data->setValue(['one']);
     $this->assertEqual($typed_data->count(), 1);
 
     // Test setting invalid values.
@@ -397,7 +397,7 @@ public function testTypedDataLists() {
    */
   public function testTypedDataListsFilter() {
     // Check that an all-pass filter leaves the list untouched.
-    $value = array('zero', 'one');
+    $value = ['zero', 'one'];
     $typed_data = $this->createTypedData(ListDataDefinition::create('string'), $value);
     $typed_data->filter(function(TypedDataInterface $item) {
       return TRUE;
@@ -409,7 +409,7 @@ public function testTypedDataListsFilter() {
     $this->assertEqual($typed_data[1]->getName(), 1);
 
     // Check that a none-pass filter empties the list.
-    $value = array('zero', 'one');
+    $value = ['zero', 'one'];
     $typed_data = $this->createTypedData(ListDataDefinition::create('string'), $value);
     $typed_data->filter(function(TypedDataInterface $item) {
       return FALSE;
@@ -417,7 +417,7 @@ public function testTypedDataListsFilter() {
     $this->assertEqual($typed_data->count(), 0);
 
     // Check that filtering correctly renumbers elements.
-    $value = array('zero', 'one', 'two');
+    $value = ['zero', 'one', 'two'];
     $typed_data = $this->createTypedData(ListDataDefinition::create('string'), $value);
     $typed_data->filter(function(TypedDataInterface $item) {
       return $item->getValue() !== 'one';
@@ -434,11 +434,11 @@ public function testTypedDataListsFilter() {
    */
   public function testTypedDataMaps() {
     // Test working with a simple map.
-    $value = array(
+    $value = [
       'one' => 'eins',
       'two' => 'zwei',
       'three' => 'drei',
-    );
+    ];
     $definition = MapDataDefinition::create()
       ->setPropertyDefinition('one', DataDefinition::create('string'))
       ->setPropertyDefinition('two', DataDefinition::create('string'))
@@ -467,11 +467,11 @@ public function testTypedDataMaps() {
     $this->assertEqual($typed_data->get('one')->getValue(), 'uno');
     // Make sure the update is reflected in the value of the map also.
     $value = $typed_data->getValue();
-    $this->assertEqual($value, array(
+    $this->assertEqual($value, [
       'one' => 'uno',
       'two' => 'zwei',
       'three' => 'drei'
-    ));
+    ]);
 
     $properties = $typed_data->getProperties();
     $this->assertEqual(array_keys($properties), array_keys($value));
@@ -479,12 +479,12 @@ public function testTypedDataMaps() {
 
     // Test setting a not defined property. It shouldn't show up in the
     // properties, but be kept in the values.
-    $typed_data->setValue(array('foo' => 'bar'));
-    $this->assertEqual(array_keys($typed_data->getProperties()), array('one', 'two', 'three'));
-    $this->assertEqual(array_keys($typed_data->getValue()), array('foo', 'one', 'two', 'three'));
+    $typed_data->setValue(['foo' => 'bar']);
+    $this->assertEqual(array_keys($typed_data->getProperties()), ['one', 'two', 'three']);
+    $this->assertEqual(array_keys($typed_data->getValue()), ['foo', 'one', 'two', 'three']);
 
     // Test getting the string representation.
-    $typed_data->setValue(array('one' => 'eins', 'two' => '', 'three' => 'drei'));
+    $typed_data->setValue(['one' => 'eins', 'two' => '', 'three' => 'drei']);
     $this->assertEqual($typed_data->getString(), 'eins, drei');
 
     // Test isEmpty and cloning.
@@ -492,14 +492,14 @@ public function testTypedDataMaps() {
     $clone = clone $typed_data;
     $this->assertTrue($typed_data->getValue() === $clone->getValue());
     $this->assertTrue($typed_data->get('one') !== $clone->get('one'));
-    $clone->setValue(array());
+    $clone->setValue([]);
     $this->assertTrue($clone->isEmpty());
 
     // Make sure the difference between NULL (not set) and an empty array is
     // kept.
     $typed_data->setValue(NULL);
     $this->assertNull($typed_data->getValue());
-    $typed_data->setValue(array());
+    $typed_data->setValue([]);
     $value = $typed_data->getValue();
     $this->assertTrue(isset($value) && is_array($value));
 
@@ -535,9 +535,9 @@ public function testTypedDataMaps() {
    */
   public function testTypedDataValidation() {
     $definition = DataDefinition::create('integer')
-      ->setConstraints(array(
-        'Range' => array('min' => 5),
-      ));
+      ->setConstraints([
+        'Range' => ['min' => 5],
+      ]);
     $violations = $this->typedDataManager->create($definition, 10)->validate();
     $this->assertEqual($violations->count(), 0);
 
@@ -546,27 +546,27 @@ public function testTypedDataValidation() {
     $this->assertEqual($violations->count(), 1);
 
     // Test translating violation messages.
-    $message = t('This value should be %limit or more.', array('%limit' => 5));
+    $message = t('This value should be %limit or more.', ['%limit' => 5]);
     $this->assertEqual($violations[0]->getMessage(), $message, 'Translated violation message retrieved.');
     $this->assertEqual($violations[0]->getPropertyPath(), '');
     $this->assertIdentical($violations[0]->getRoot(), $integer, 'Root object returned.');
 
     // Test translating violation messages when pluralization is used.
     $definition = DataDefinition::create('string')
-      ->setConstraints(array(
-        'Length' => array('min' => 10),
-      ));
+      ->setConstraints([
+        'Length' => ['min' => 10],
+      ]);
     $violations = $this->typedDataManager->create($definition, "short")->validate();
     $this->assertEqual($violations->count(), 1);
-    $message = t('This value is too short. It should have %limit characters or more.', array('%limit' => 10));
+    $message = t('This value is too short. It should have %limit characters or more.', ['%limit' => 10]);
     $this->assertEqual($violations[0]->getMessage(), $message, 'Translated violation message retrieved.');
 
     // Test having multiple violations.
     $definition = DataDefinition::create('integer')
-      ->setConstraints(array(
-        'Range' => array('min' => 5),
-        'Null' => array(),
-      ));
+      ->setConstraints([
+        'Range' => ['min' => 5],
+        'Null' => [],
+      ]);
     $violations = $this->typedDataManager->create($definition, 10)->validate();
     $this->assertEqual($violations->count(), 1);
     $violations = $this->typedDataManager->create($definition, 1)->validate();
@@ -575,12 +575,12 @@ public function testTypedDataValidation() {
     // Test validating property containers and make sure the NotNull and Null
     // constraints work with typed data containers.
     $definition = BaseFieldDefinition::create('integer')
-      ->setConstraints(array('NotNull' => array()));
-    $field_item = $this->typedDataManager->create($definition, array('value' => 10));
+      ->setConstraints(['NotNull' => []]);
+    $field_item = $this->typedDataManager->create($definition, ['value' => 10]);
     $violations = $field_item->validate();
     $this->assertEqual($violations->count(), 0);
 
-    $field_item = $this->typedDataManager->create($definition, array('value' => 'no integer'));
+    $field_item = $this->typedDataManager->create($definition, ['value' => 'no integer']);
     $violations = $field_item->validate();
     $this->assertEqual($violations->count(), 1);
     $this->assertEqual($violations[0]->getPropertyPath(), '0.value');
@@ -592,8 +592,8 @@ public function testTypedDataValidation() {
 
     // Test the Null constraint with typed data containers.
     $definition = BaseFieldDefinition::create('float')
-      ->setConstraints(array('Null' => array()));
-    $field_item = $this->typedDataManager->create($definition, array('value' => 11.5));
+      ->setConstraints(['Null' => []]);
+    $field_item = $this->typedDataManager->create($definition, ['value' => 11.5]);
     $violations = $field_item->validate();
     $this->assertEqual($violations->count(), 1);
     $field_item = $this->typedDataManager->create($definition);
@@ -622,9 +622,9 @@ public function testTypedDataValidation() {
     // Test validating a list of a values and make sure property paths starting
     // with "0" are created.
     $definition = BaseFieldDefinition::create('integer');
-    $violations = $this->typedDataManager->create($definition, array(array('value' => 10)))->validate();
+    $violations = $this->typedDataManager->create($definition, [['value' => 10]])->validate();
     $this->assertEqual($violations->count(), 0);
-    $violations = $this->typedDataManager->create($definition, array(array('value' => 'string')))->validate();
+    $violations = $this->typedDataManager->create($definition, [['value' => 'string']])->validate();
     $this->assertEqual($violations->count(), 1);
 
     $this->assertEqual($violations[0]->getInvalidValue(), 'string');
diff --git a/core/tests/Drupal/KernelTests/KernelTestBase.php b/core/tests/Drupal/KernelTests/KernelTestBase.php
index 9f6b975d8e8401833fb568290fed5ca93b6a94ac..5621d4aa192bec3ed3d0f50f08df024bdf9b4e50 100644
--- a/core/tests/Drupal/KernelTests/KernelTestBase.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBase.php
@@ -147,7 +147,7 @@ abstract class KernelTestBase extends \PHPUnit_Framework_TestCase implements Ser
    *
    * @var array
    */
-  protected static $modules = array();
+  protected static $modules = [];
 
   /**
    * The virtual filesystem root directory.
@@ -193,7 +193,7 @@ abstract class KernelTestBase extends \PHPUnit_Framework_TestCase implements Ser
    *
    * @var string[]
    */
-  protected static $configSchemaCheckerExclusions = array(
+  protected static $configSchemaCheckerExclusions = [
     // Following are used to test lack of or partial schema. Where partial
     // schema is provided, that is explicitly tested in specific tests.
     'config_schema_test.noschema',
@@ -202,7 +202,7 @@ abstract class KernelTestBase extends \PHPUnit_Framework_TestCase implements Ser
     'config_schema_test.no_schema_data_types',
     // Used to test application of schema to filtering of configuration.
     'config_test.dynamic.system',
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -245,7 +245,7 @@ protected function setUp() {
    * @internal
    */
   protected function bootEnvironment() {
-    $this->streamWrappers = array();
+    $this->streamWrappers = [];
     \Drupal::unsetContainer();
 
     $this->classLoader = require $this->root . '/autoload.php';
@@ -263,13 +263,13 @@ protected function bootEnvironment() {
     $this->databasePrefix = $test_db->getDatabasePrefix();
     drupal_valid_test_ua($this->databasePrefix);
 
-    $settings = array(
+    $settings = [
       'hash_salt' => get_class($this),
       'file_public_path' => $this->siteDirectory . '/files',
       // Disable Twig template caching/dumping.
       'twig_cache' => FALSE,
       // @see \Drupal\KernelTests\KernelTestBase::register()
-    );
+    ];
     new Settings($settings);
 
     $this->setUpFilesystem();
@@ -298,9 +298,9 @@ protected function setUpFilesystem() {
     $settings['file_public_path'] = $this->siteDirectory . '/files';
     new Settings($settings);
 
-    $GLOBALS['config_directories'] = array(
+    $GLOBALS['config_directories'] = [
       CONFIG_SYNC_DIRECTORY => $this->siteDirectory . '/files/config/sync',
-    );
+    ];
   }
 
   /**
@@ -389,11 +389,11 @@ private function bootKernel() {
 
     // Write the core.extension configuration.
     // Required for ConfigInstaller::installDefaultConfig() to work.
-    $this->container->get('config.storage')->write('core.extension', array(
+    $this->container->get('config.storage')->write('core.extension', [
       'module' => array_fill_keys($modules, 0),
-      'theme' => array(),
+      'theme' => [],
       'profile' => '',
-    ));
+    ]);
 
     $settings = Settings::getAll();
     $settings['php_storage']['default'] = [
@@ -456,9 +456,9 @@ protected function getDatabaseConnectionInfo() {
       foreach ($connection_info as $target => $value) {
         // Replace the full table prefix definition to ensure that no table
         // prefixes of the test runner leak into the test.
-        $connection_info[$target]['prefix'] = array(
+        $connection_info[$target]['prefix'] = [
           'default' => $value['prefix']['default'] . $this->databasePrefix,
-        );
+        ];
       }
     }
     return $connection_info;
@@ -563,9 +563,9 @@ protected function initFileCache() {
    * @see \Drupal\Core\Extension\ModuleHandler::add()
    */
   private function getExtensionsForModules(array $modules) {
-    $extensions = array();
+    $extensions = [];
     $discovery = new ExtensionDiscovery($this->root);
-    $discovery->setProfileDirectories(array());
+    $discovery->setProfileDirectories([]);
     $list = $discovery->scan('module');
     foreach ($modules as $name) {
       if (!isset($list[$name])) {
@@ -628,7 +628,7 @@ public function register(ContainerBuilder $container) {
 
     if ($container->hasDefinition('password')) {
       $container->getDefinition('password')
-        ->setArguments(array(1));
+        ->setArguments([1]);
     }
     TestServiceProvider::addRouteProvider($container);
   }
@@ -706,7 +706,7 @@ protected function tearDown() {
     // Free up memory: Custom test class properties.
     // Note: Private properties cannot be cleaned up.
     $rc = new \ReflectionClass(__CLASS__);
-    $blacklist = array();
+    $blacklist = [];
     foreach ($rc->getProperties() as $property) {
       $blacklist[$property->name] = $property->getDeclaringClass()->name;
     }
@@ -726,7 +726,7 @@ protected function tearDown() {
     }
     \Drupal::unsetContainer();
     $this->container = NULL;
-    new Settings(array());
+    new Settings([]);
 
     parent::tearDown();
   }
@@ -829,18 +829,18 @@ protected function installEntitySchema($entity_type_id) {
       $all_tables_exist = TRUE;
       foreach ($tables as $table) {
         if (!$db_schema->tableExists($table)) {
-          $this->fail(SafeMarkup::format('Installed entity type table for the %entity_type entity type: %table', array(
+          $this->fail(SafeMarkup::format('Installed entity type table for the %entity_type entity type: %table', [
             '%entity_type' => $entity_type_id,
             '%table' => $table,
-          )));
+          ]));
           $all_tables_exist = FALSE;
         }
       }
       if ($all_tables_exist) {
-        $this->pass(SafeMarkup::format('Installed entity type tables for the %entity_type entity type: %tables', array(
+        $this->pass(SafeMarkup::format('Installed entity type tables for the %entity_type entity type: %tables', [
           '%entity_type' => $entity_type_id,
           '%tables' => '{' . implode('}, {', $tables) . '}',
-        )));
+        ]));
       }
     }
   }
@@ -1027,7 +1027,7 @@ protected function vfsDump() {
    * @return array
    */
   private static function getModulesToEnable($class) {
-    $modules = array();
+    $modules = [];
     while ($class) {
       if (property_exists($class, 'modules')) {
         // Only add the modules, if the $modules property was not inherited.
@@ -1059,11 +1059,11 @@ protected function prepareTemplate(\Text_Template $template) {
     // @see /core/tests/bootstrap.php
     $bootstrap_globals .= '$namespaces = ' . var_export($GLOBALS['namespaces'], TRUE) . ";\n";
 
-    $template->setVar(array(
+    $template->setVar([
       'constants' => '',
       'included_files' => '',
       'globals' => $bootstrap_globals,
-    ));
+    ]);
   }
 
   /**
@@ -1086,12 +1086,12 @@ protected function isTestInIsolation() {
    * @deprecated in Drupal 8.0.x, will be removed before Drupal 8.2.0.
    */
   public function __get($name) {
-    if (in_array($name, array(
+    if (in_array($name, [
       'public_files_directory',
       'private_files_directory',
       'temp_files_directory',
       'translation_files_directory',
-    ))) {
+    ])) {
       // @comment it in again.
       trigger_error(sprintf("KernelTestBase::\$%s no longer exists. Use the regular API method to retrieve it instead (e.g., Settings).", $name), E_USER_DEPRECATED);
       switch ($name) {
@@ -1111,12 +1111,12 @@ public function __get($name) {
 
     if ($name === 'configDirectories') {
       trigger_error(sprintf("KernelTestBase::\$%s no longer exists. Use config_get_config_directory() directly instead.", $name), E_USER_DEPRECATED);
-      return array(
+      return [
         CONFIG_SYNC_DIRECTORY => config_get_config_directory(CONFIG_SYNC_DIRECTORY),
-      );
+      ];
     }
 
-    $denied = array(
+    $denied = [
       // @see \Drupal\simpletest\TestBase
       'testId',
       'timeLimit',
@@ -1134,7 +1134,7 @@ public function __get($name) {
       'generatedTestFiles',
       // Properties from the old KernelTestBase class that has been removed.
       'keyValueFactory',
-    );
+    ];
     if (in_array($name, $denied) || strpos($name, 'original') === 0) {
       throw new \RuntimeException(sprintf('TestBase::$%s property no longer exists', $name));
     }
diff --git a/core/tests/Drupal/KernelTests/KernelTestBaseTest.php b/core/tests/Drupal/KernelTests/KernelTestBaseTest.php
index 469debed27defd99699c31dec314e33f02f5d898..7d89fd7bd896571661a1a3d23aa3682aa3a7422a 100644
--- a/core/tests/Drupal/KernelTests/KernelTestBaseTest.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBaseTest.php
@@ -27,21 +27,21 @@ public function testSetUpBeforeClass() {
   public function testBootEnvironment() {
     $this->assertRegExp('/^test\d{8}$/', $this->databasePrefix);
     $this->assertStringStartsWith('vfs://root/sites/simpletest/', $this->siteDirectory);
-    $this->assertEquals(array(
-      'root' => array(
-        'sites' => array(
-          'simpletest' => array(
-            substr($this->databasePrefix, 4) => array(
-              'files' => array(
-                'config' => array(
-                  'sync' => array(),
-                ),
-              ),
-            ),
-          ),
-        ),
-      ),
-    ), vfsStream::inspect(new vfsStreamStructureVisitor())->getStructure());
+    $this->assertEquals([
+      'root' => [
+        'sites' => [
+          'simpletest' => [
+            substr($this->databasePrefix, 4) => [
+              'files' => [
+                'config' => [
+                  'sync' => [],
+                ],
+              ],
+            ],
+          ],
+        ],
+      ],
+    ], vfsStream::inspect(new vfsStreamStructureVisitor())->getStructure());
   }
 
   /**
@@ -70,15 +70,15 @@ public function testSetUp() {
     $this->assertArrayHasKey('destroy-me', $GLOBALS);
 
     $database = $this->container->get('database');
-    $database->schema()->createTable('foo', array(
-      'fields' => array(
-        'number' => array(
+    $database->schema()->createTable('foo', [
+      'fields' => [
+        'number' => [
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $this->assertTrue($database->schema()->tableExists('foo'));
 
     // Ensure that the database tasks have been run during set up. Neither MySQL
@@ -120,7 +120,7 @@ public function testRegister() {
     $this->assertSame($request, \Drupal::request());
 
     // Trigger a container rebuild.
-    $this->enableModules(array('system'));
+    $this->enableModules(['system']);
 
     // Verify that this container is identical to the actual container.
     $this->assertInstanceOf('Symfony\Component\DependencyInjection\ContainerInterface', $this->container);
@@ -165,16 +165,16 @@ public function testRender() {
     $element_info = $this->container->get('element_info');
     $this->assertSame(['#defaults_loaded' => TRUE], $element_info->getInfo($type));
 
-    $this->enableModules(array('filter'));
+    $this->enableModules(['filter']);
 
     $this->assertNotSame($element_info, $this->container->get('element_info'));
     $this->assertNotEmpty($this->container->get('element_info')->getInfo($type));
 
-    $build = array(
+    $build = [
       '#type' => 'html_tag',
       '#tag' => 'h3',
       '#value' => 'Inner',
-    );
+    ];
     $expected = "<h3>Inner</h3>\n";
 
     $this->assertEquals('core', \Drupal::theme()->getActiveTheme()->getName());
@@ -189,12 +189,12 @@ public function testRender() {
    * @covers ::render
    */
   public function testRenderWithTheme() {
-    $this->enableModules(array('system'));
+    $this->enableModules(['system']);
 
-    $build = array(
+    $build = [
       '#type' => 'textfield',
       '#name' => 'test',
-    );
+    ];
     $expected = '/' . preg_quote('<input type="text" name="test"', '/') . '/';
 
     $this->assertArrayNotHasKey('theme', $GLOBALS);
@@ -220,11 +220,11 @@ protected function tearDown() {
       $this->assertTrue(empty($tables), 'All test tables have been removed.');
     }
     else {
-      $result = $connection->query("SELECT name FROM " . $this->databasePrefix . ".sqlite_master WHERE type = :type AND name LIKE :table_name AND name NOT LIKE :pattern", array(
+      $result = $connection->query("SELECT name FROM " . $this->databasePrefix . ".sqlite_master WHERE type = :type AND name LIKE :table_name AND name NOT LIKE :pattern", [
         ':type' => 'table',
         ':table_name' => '%',
         ':pattern' => 'sqlite_%',
-      ))->fetchAllKeyed(0, 0);
+      ])->fetchAllKeyed(0, 0);
 
       $this->assertTrue(empty($result), 'All test tables have been removed.');
     }
diff --git a/core/tests/Drupal/Tests/BrowserTestBase.php b/core/tests/Drupal/Tests/BrowserTestBase.php
index d4968f44b2d6b51ef7bcd7bb7e71eab758382f43..754f9d9838f04266848992d721fa47e73ba88b9b 100644
--- a/core/tests/Drupal/Tests/BrowserTestBase.php
+++ b/core/tests/Drupal/Tests/BrowserTestBase.php
@@ -493,7 +493,7 @@ protected function cleanupEnvironment() {
     }
 
     // Delete test site directory.
-    file_unmanaged_delete_recursive($this->siteDirectory, array($this, 'filePreDeleteCallback'));
+    file_unmanaged_delete_recursive($this->siteDirectory, [$this, 'filePreDeleteCallback']);
   }
 
   /**
@@ -572,7 +572,7 @@ protected function prepareRequest() {
    * @return string
    *   An absolute URL stsring.
    */
-  protected function buildUrl($path, array $options = array()) {
+  protected function buildUrl($path, array $options = []) {
     if ($path instanceof Url) {
       $url_options = $path->getOptions();
       $options = $url_options + $options;
@@ -620,7 +620,7 @@ protected function buildUrl($path, array $options = array()) {
    * @return string
    *   The retrieved HTML string, also available as $this->getRawContent()
    */
-  protected function drupalGet($path, array $options = array(), array $headers = array()) {
+  protected function drupalGet($path, array $options = [], array $headers = []) {
     $options['absolute'] = TRUE;
     $url = $this->buildUrl($path, $options);
 
@@ -715,14 +715,14 @@ protected function drupalLogin(AccountInterface $account) {
 
     $this->drupalGet('user/login');
     $this->assertSession()->statusCodeEquals(200);
-    $this->submitForm(array(
+    $this->submitForm([
       'name' => $account->getUsername(),
       'pass' => $account->passRaw,
-    ), t('Log in'));
+    ], t('Log in'));
 
     // @see BrowserTestBase::drupalUserIsLoggedIn()
     $account->sessionId = $this->getSession()->getCookie($this->getSessionName());
-    $this->assertTrue($this->drupalUserIsLoggedIn($account), new FormattableMarkup('User %name successfully logged in.', array('%name' => $account->getAccountName())));
+    $this->assertTrue($this->drupalUserIsLoggedIn($account), new FormattableMarkup('User %name successfully logged in.', ['%name' => $account->getAccountName()]));
 
     $this->loggedInUser = $account;
     $this->container->get('current_user')->setAccount($account);
@@ -738,7 +738,7 @@ protected function drupalLogout() {
     // idea being if you were properly logged out you should be seeing a login
     // screen.
     $assert_session = $this->assertSession();
-    $this->drupalGet('user/logout', array('query' => array('destination' => 'user')));
+    $this->drupalGet('user/logout', ['query' => ['destination' => 'user']]);
     $assert_session->statusCodeEquals(200);
     $assert_session->fieldExists('name');
     $assert_session->fieldExists('pass');
@@ -893,7 +893,7 @@ protected function submitForm(array $edit, $submit, $form_html_id = NULL) {
    * @param array $options
    *   Options to be forwarded to the url generator.
    */
-  protected function drupalPostForm($path, $edit, $submit, array $options = array()) {
+  protected function drupalPostForm($path, $edit, $submit, array $options = []) {
     if (is_object($submit)) {
       // Cast MarkupInterface objects to string.
       $submit = (string) $submit;
@@ -965,35 +965,35 @@ protected function installParameters() {
     unset($connection_info['default']['namespace']);
     unset($connection_info['default']['pdo']);
     unset($connection_info['default']['init_commands']);
-    $parameters = array(
+    $parameters = [
       'interactive' => FALSE,
-      'parameters' => array(
+      'parameters' => [
         'profile' => $this->profile,
         'langcode' => 'en',
-      ),
-      'forms' => array(
-        'install_settings_form' => array(
+      ],
+      'forms' => [
+        'install_settings_form' => [
           'driver' => $driver,
           $driver => $connection_info['default'],
-        ),
-        'install_configure_form' => array(
+        ],
+        'install_configure_form' => [
           'site_name' => 'Drupal',
           'site_mail' => 'simpletest@example.com',
-          'account' => array(
+          'account' => [
             'name' => $this->rootUser->name,
             'mail' => $this->rootUser->getEmail(),
-            'pass' => array(
+            'pass' => [
               'pass1' => $this->rootUser->pass_raw,
               'pass2' => $this->rootUser->pass_raw,
-            ),
-          ),
+            ],
+          ],
           // form_type_checkboxes_value() requires NULL instead of FALSE values
           // for programmatic form submissions to disable a checkbox.
           'enable_update_status_module' => NULL,
           'enable_update_status_emails' => NULL,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     return $parameters;
   }
 
@@ -1063,10 +1063,10 @@ protected function prepareEnvironment() {
     drupal_valid_test_ua($this->databasePrefix);
 
     // Reset settings.
-    new Settings(array(
+    new Settings([
       // For performance, simply use the database prefix as hash salt.
       'hash_salt' => $this->databasePrefix,
-    ));
+    ]);
 
     drupal_set_time_limit($this->timeLimit);
 
diff --git a/core/tests/Drupal/Tests/Component/Bridge/ZfExtensionManagerSfContainerTest.php b/core/tests/Drupal/Tests/Component/Bridge/ZfExtensionManagerSfContainerTest.php
index 9efbf4ecc5db54dc616b1c68b57564b8f2c631b3..c14bdfb3e5958d22522eb30eea127075a54fd0a3 100644
--- a/core/tests/Drupal/Tests/Component/Bridge/ZfExtensionManagerSfContainerTest.php
+++ b/core/tests/Drupal/Tests/Component/Bridge/ZfExtensionManagerSfContainerTest.php
@@ -80,41 +80,41 @@ public function testCanonicalizeName($name, $canonical_name) {
    *   array('-' => '', '_' => '', ' ' => '', '\\' => '', '/' => '')
    */
   public function canonicalizeNameProvider() {
-    return array(
-      array(
+    return [
+      [
         'foobar',
         'foobar',
-      ),
-      array(
+      ],
+      [
         'foo-bar',
         'foobar',
-      ),
-      array(
+      ],
+      [
         'foo_bar',
         'foobar',
-      ),
-      array(
+      ],
+      [
         'foo bar',
         'foobar',
-      ),
-      array(
+      ],
+      [
         'foo\\bar',
         'foobar',
-      ),
-      array(
+      ],
+      [
         'foo/bar',
         'foobar',
-      ),
+      ],
       // There is also a strtolower in canonicalizeName.
-      array(
+      [
         'Foo/bAr',
         'foobar',
-      ),
-      array(
+      ],
+      [
         'foo/-_\\ bar',
         'foobar',
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php b/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
index ddbcf6a119d7f78be9c0c170905ee2062ea12b59..95fdd64d182af60eb4647529488554a56a1a50d3 100644
--- a/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
+++ b/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
@@ -293,21 +293,21 @@ public function testDateTimezoneWithDateTimeObject() {
    * @see DateTimePlusTest::testDates()
    */
   public function providerTestDates() {
-    return array(
+    return [
       // String input.
       // Create date object from datetime string.
-      array('2009-03-07 10:30', 'America/Chicago', '2009-03-07T10:30:00-06:00'),
+      ['2009-03-07 10:30', 'America/Chicago', '2009-03-07T10:30:00-06:00'],
       // Same during daylight savings time.
-      array('2009-06-07 10:30', 'America/Chicago', '2009-06-07T10:30:00-05:00'),
+      ['2009-06-07 10:30', 'America/Chicago', '2009-06-07T10:30:00-05:00'],
       // Create date object from date string.
-      array('2009-03-07', 'America/Chicago', '2009-03-07T00:00:00-06:00'),
+      ['2009-03-07', 'America/Chicago', '2009-03-07T00:00:00-06:00'],
       // Same during daylight savings time.
-      array('2009-06-07', 'America/Chicago', '2009-06-07T00:00:00-05:00'),
+      ['2009-06-07', 'America/Chicago', '2009-06-07T00:00:00-05:00'],
       // Create date object from date string.
-      array('2009-03-07 10:30', 'Australia/Canberra', '2009-03-07T10:30:00+11:00'),
+      ['2009-03-07 10:30', 'Australia/Canberra', '2009-03-07T10:30:00+11:00'],
       // Same during daylight savings time.
-      array('2009-06-07 10:30', 'Australia/Canberra', '2009-06-07T10:30:00+10:00'),
-    );
+      ['2009-06-07 10:30', 'Australia/Canberra', '2009-06-07T10:30:00+10:00'],
+    ];
   }
 
   /**
@@ -320,17 +320,17 @@ public function providerTestDates() {
    * @see DateTimePlusTest::testDates()
    */
   public function providerTestDateArrays() {
-    return array(
+    return [
       // Array input.
       // Create date object from date array, date only.
-      array(array('year' => 2010, 'month' => 2, 'day' => 28), 'America/Chicago', '2010-02-28T00:00:00-06:00'),
+      [['year' => 2010, 'month' => 2, 'day' => 28], 'America/Chicago', '2010-02-28T00:00:00-06:00'],
       // Create date object from date array with hour.
-      array(array('year' => 2010, 'month' => 2, 'day' => 28, 'hour' => 10), 'America/Chicago', '2010-02-28T10:00:00-06:00'),
+      [['year' => 2010, 'month' => 2, 'day' => 28, 'hour' => 10], 'America/Chicago', '2010-02-28T10:00:00-06:00'],
       // Create date object from date array, date only.
-      array(array('year' => 2010, 'month' => 2, 'day' => 28), 'Europe/Berlin', '2010-02-28T00:00:00+01:00'),
+      [['year' => 2010, 'month' => 2, 'day' => 28], 'Europe/Berlin', '2010-02-28T00:00:00+01:00'],
       // Create date object from date array with hour.
-      array(array('year' => 2010, 'month' => 2, 'day' => 28, 'hour' => 10), 'Europe/Berlin', '2010-02-28T10:00:00+01:00'),
-    );
+      [['year' => 2010, 'month' => 2, 'day' => 28, 'hour' => 10], 'Europe/Berlin', '2010-02-28T10:00:00+01:00'],
+    ];
   }
 
   /**
@@ -347,16 +347,16 @@ public function providerTestDateArrays() {
    * @see testDateFormats()
    */
   public function providerTestDateFormat() {
-    return array(
+    return [
       // Create a year-only date.
-      array('2009', NULL, 'Y', 'Y', '2009'),
+      ['2009', NULL, 'Y', 'Y', '2009'],
       // Create a month and year-only date.
-      array('2009-10', NULL, 'Y-m', 'Y-m', '2009-10'),
+      ['2009-10', NULL, 'Y-m', 'Y-m', '2009-10'],
       // Create a time-only date.
-      array('T10:30:00', NULL, '\TH:i:s', 'H:i:s', '10:30:00'),
+      ['T10:30:00', NULL, '\TH:i:s', 'H:i:s', '10:30:00'],
       // Create a time-only date.
-      array('10:30:00', NULL, 'H:i:s', 'H:i:s', '10:30:00'),
-    );
+      ['10:30:00', NULL, 'H:i:s', 'H:i:s', '10:30:00'],
+    ];
   }
 
   /**
@@ -372,20 +372,20 @@ public function providerTestDateFormat() {
    * @see testInvalidDates
    */
   public function providerTestInvalidDates() {
-    return array(
+    return [
       // Test for invalid month names when we are using a short version
       // of the month.
-      array('23 abc 2012', NULL, 'd M Y', "23 abc 2012 contains an invalid month name and did not produce errors.", \InvalidArgumentException::class),
+      ['23 abc 2012', NULL, 'd M Y', "23 abc 2012 contains an invalid month name and did not produce errors.", \InvalidArgumentException::class],
       // Test for invalid hour.
-      array('0000-00-00T45:30:00', NULL, 'Y-m-d\TH:i:s', "0000-00-00T45:30:00 contains an invalid hour and did not produce errors.", \UnexpectedValueException::class),
+      ['0000-00-00T45:30:00', NULL, 'Y-m-d\TH:i:s', "0000-00-00T45:30:00 contains an invalid hour and did not produce errors.", \UnexpectedValueException::class],
       // Test for invalid day.
-      array('0000-00-99T05:30:00', NULL, 'Y-m-d\TH:i:s', "0000-00-99T05:30:00 contains an invalid day and did not produce errors.", \UnexpectedValueException::class),
+      ['0000-00-99T05:30:00', NULL, 'Y-m-d\TH:i:s', "0000-00-99T05:30:00 contains an invalid day and did not produce errors.", \UnexpectedValueException::class],
       // Test for invalid month.
-      array('0000-75-00T15:30:00', NULL, 'Y-m-d\TH:i:s', "0000-75-00T15:30:00 contains an invalid month and did not produce errors.", \UnexpectedValueException::class),
+      ['0000-75-00T15:30:00', NULL, 'Y-m-d\TH:i:s', "0000-75-00T15:30:00 contains an invalid month and did not produce errors.", \UnexpectedValueException::class],
       // Test for invalid year.
-      array('11-08-01T15:30:00', NULL, 'Y-m-d\TH:i:s', "11-08-01T15:30:00 contains an invalid year and did not produce errors.", \UnexpectedValueException::class),
+      ['11-08-01T15:30:00', NULL, 'Y-m-d\TH:i:s', "11-08-01T15:30:00 contains an invalid year and did not produce errors.", \UnexpectedValueException::class],
 
-    );
+    ];
   }
 
   /**
@@ -399,20 +399,20 @@ public function providerTestInvalidDates() {
    * @see testInvalidDateArrays
    */
   public function providerTestInvalidDateArrays() {
-    return array(
+    return [
       // One year larger than the documented upper limit of checkdate().
-      array(array('year' => 32768, 'month' => 1, 'day' => 8, 'hour' => 8, 'minute' => 0, 'second' => 0), 'America/Chicago', \InvalidArgumentException::class),
+      [['year' => 32768, 'month' => 1, 'day' => 8, 'hour' => 8, 'minute' => 0, 'second' => 0], 'America/Chicago', \InvalidArgumentException::class],
       // One year smaller than the documented lower limit of checkdate().
-      array(array('year' => 0, 'month' => 1, 'day' => 8, 'hour' => 8, 'minute' => 0, 'second' => 0), 'America/Chicago', \InvalidArgumentException::class),
+      [['year' => 0, 'month' => 1, 'day' => 8, 'hour' => 8, 'minute' => 0, 'second' => 0], 'America/Chicago', \InvalidArgumentException::class],
       // Test for invalid month from date array.
-      array(array('year' => 2010, 'month' => 27, 'day' => 8, 'hour' => 8, 'minute' => 0, 'second' => 0), 'America/Chicago', \InvalidArgumentException::class),
+      [['year' => 2010, 'month' => 27, 'day' => 8, 'hour' => 8, 'minute' => 0, 'second' => 0], 'America/Chicago', \InvalidArgumentException::class],
       // Test for invalid hour from date array.
-      array(array('year' => 2010, 'month' => 2, 'day' => 28, 'hour' => 80, 'minute' => 0, 'second' => 0), 'America/Chicago', \InvalidArgumentException::class),
+      [['year' => 2010, 'month' => 2, 'day' => 28, 'hour' => 80, 'minute' => 0, 'second' => 0], 'America/Chicago', \InvalidArgumentException::class],
       // Test for invalid minute from date array.
-      array(array('year' => 2010, 'month' => 7, 'day' => 8, 'hour' => 8, 'minute' => 88, 'second' => 0), 'America/Chicago', \InvalidArgumentException::class),
+      [['year' => 2010, 'month' => 7, 'day' => 8, 'hour' => 8, 'minute' => 88, 'second' => 0], 'America/Chicago', \InvalidArgumentException::class],
       // Regression test for https://www.drupal.org/node/2084455.
-      array(array('hour' => 59, 'minute' => 1, 'second' => 1), 'America/Chicago', \InvalidArgumentException::class),
-    );
+      [['hour' => 59, 'minute' => 1, 'second' => 1], 'America/Chicago', \InvalidArgumentException::class],
+    ];
   }
 
   /**
@@ -434,17 +434,17 @@ public function providerTestDateTimezone() {
     // Detect the system timezone.
     $system_timezone = date_default_timezone_get();
 
-    return array(
+    return [
       // Create a date object with an unspecified timezone, which should
       // end up using the system timezone.
-      array($date_string, NULL, $system_timezone, 'DateTimePlus uses the system timezone when there is no site timezone.'),
+      [$date_string, NULL, $system_timezone, 'DateTimePlus uses the system timezone when there is no site timezone.'],
       // Create a date object with a specified timezone name.
-      array($date_string, 'America/Yellowknife', 'America/Yellowknife', 'DateTimePlus uses the specified timezone if provided.'),
+      [$date_string, 'America/Yellowknife', 'America/Yellowknife', 'DateTimePlus uses the specified timezone if provided.'],
       // Create a date object with a timezone object.
-      array($date_string, new \DateTimeZone('Australia/Canberra'), 'Australia/Canberra', 'DateTimePlus uses the specified timezone if provided.'),
+      [$date_string, new \DateTimeZone('Australia/Canberra'), 'Australia/Canberra', 'DateTimePlus uses the specified timezone if provided.'],
       // Create a date object with another date object.
-      array(new DateTimePlus('now', 'Pacific/Midway'), NULL, 'Pacific/Midway', 'DateTimePlus uses the specified timezone if provided.'),
-    );
+      [new DateTimePlus('now', 'Pacific/Midway'), NULL, 'Pacific/Midway', 'DateTimePlus uses the specified timezone if provided.'],
+    ];
   }
 
   /**
@@ -457,46 +457,46 @@ public function providerTestDateTimezone() {
    * @see testTimestamp()
    */
   public function providerTestTimestamp() {
-    return array(
+    return [
       // Create date object from a unix timestamp and display it in
       // local time.
-      array(
+      [
         'input' => 0,
-        'initial' => array(
+        'initial' => [
           'timezone' => 'UTC',
           'format' => 'c',
           'expected_date' => '1970-01-01T00:00:00+00:00',
           'expected_timezone' => 'UTC',
           'expected_offset' => 0,
-        ),
-        'transform' => array(
+        ],
+        'transform' => [
           'timezone' => 'America/Los_Angeles',
           'format' => 'c',
           'expected_date' => '1969-12-31T16:00:00-08:00',
           'expected_timezone' => 'America/Los_Angeles',
           'expected_offset' => '-28800',
-        ),
-      ),
+        ],
+      ],
       // Create a date using the timestamp of zero, then display its
       // value both in UTC and the local timezone.
-      array(
+      [
         'input' => 0,
-        'initial' => array(
+        'initial' => [
           'timezone' => 'America/Los_Angeles',
           'format' => 'c',
           'expected_date' => '1969-12-31T16:00:00-08:00',
           'expected_timezone' => 'America/Los_Angeles',
           'expected_offset' => '-28800',
-        ),
-        'transform' => array(
+        ],
+        'transform' => [
           'timezone' => 'UTC',
           'format' => 'c',
           'expected_date' => '1970-01-01T00:00:00+00:00',
           'expected_timezone' => 'UTC',
           'expected_offset' => 0,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -509,63 +509,63 @@ public function providerTestTimestamp() {
    * @see testDateTimestamp()
    */
   public function providerTestDateTimestamp() {
-    return array(
+    return [
       // Create date object from datetime string in UTC, and convert
       // it to a local date.
-      array(
+      [
         'input' => '1970-01-01 00:00:00',
-        'initial' => array(
+        'initial' => [
           'timezone' => 'UTC',
           'format' => 'c',
           'expected_date' => '1970-01-01T00:00:00+00:00',
           'expected_timezone' => 'UTC',
           'expected_offset' => 0,
-        ),
-        'transform' => array(
+        ],
+        'transform' => [
           'timezone' => 'America/Los_Angeles',
           'format' => 'c',
           'expected_date' => '1969-12-31T16:00:00-08:00',
           'expected_timezone' => 'America/Los_Angeles',
           'expected_offset' => '-28800',
-        ),
-      ),
+        ],
+      ],
       // Convert the local time to UTC using string input.
-      array(
+      [
         'input' => '1969-12-31 16:00:00',
-        'initial' => array(
+        'initial' => [
           'timezone' => 'America/Los_Angeles',
           'format' => 'c',
           'expected_date' => '1969-12-31T16:00:00-08:00',
           'expected_timezone' => 'America/Los_Angeles',
           'expected_offset' => '-28800',
-        ),
-        'transform' => array(
+        ],
+        'transform' => [
           'timezone' => 'UTC',
           'format' => 'c',
           'expected_date' => '1970-01-01T00:00:00+00:00',
           'expected_timezone' => 'UTC',
           'expected_offset' => 0,
-        ),
-      ),
+        ],
+      ],
       // Convert the local time to UTC using string input.
-      array(
+      [
         'input' => '1969-12-31 16:00:00',
-        'initial' => array(
+        'initial' => [
           'timezone' => 'Europe/Warsaw',
           'format' => 'c',
           'expected_date' => '1969-12-31T16:00:00+01:00',
           'expected_timezone' => 'Europe/Warsaw',
           'expected_offset' => '+3600',
-        ),
-        'transform' => array(
+        ],
+        'transform' => [
           'timezone' => 'UTC',
           'format' => 'c',
           'expected_date' => '1969-12-31T15:00:00+00:00',
           'expected_timezone' => 'UTC',
           'expected_offset' => 0,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -590,60 +590,60 @@ public function providerTestDateDiff() {
     $negative_1_hour = new \DateInterval('PT1H');
     $negative_1_hour->invert = 1;
 
-    return array(
+    return [
       // There should be a 19 hour time interval between
       // new years in Sydney and new years in LA in year 2000.
-      array(
+      [
         'input2' => DateTimePlus::createFromFormat('Y-m-d H:i:s', '2000-01-01 00:00:00', new \DateTimeZone('Australia/Sydney')),
         'input1' => DateTimePlus::createFromFormat('Y-m-d H:i:s', '2000-01-01 00:00:00', new \DateTimeZone('America/Los_Angeles')),
         'absolute' => FALSE,
         'expected' => $positive_19_hours,
-      ),
+      ],
       // In 1970 Sydney did not observe daylight savings time
       // So there is only a 18 hour time interval.
-      array(
+      [
         'input2' => DateTimePlus::createFromFormat('Y-m-d H:i:s', '1970-01-01 00:00:00', new \DateTimeZone('Australia/Sydney')),
         'input1' => DateTimePlus::createFromFormat('Y-m-d H:i:s', '1970-01-01 00:00:00', new \DateTimeZone('America/Los_Angeles')),
         'absolute' => FALSE,
         'expected' => $positive_18_hours,
-      ),
-      array(
+      ],
+      [
         'input1' => DateTimePlus::createFromFormat('U', 3600, new \DateTimeZone('America/Los_Angeles')),
         'input2' => DateTimePlus::createFromFormat('U', 0, new \DateTimeZone('UTC')),
         'absolute' => FALSE,
         'expected' => $negative_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DateTimePlus::createFromFormat('U', 3600),
         'input2' => DateTimePlus::createFromFormat('U', 0),
         'absolute' => FALSE,
         'expected' => $negative_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DateTimePlus::createFromFormat('U', 3600),
         'input2' => \DateTime::createFromFormat('U', 0),
         'absolute' => FALSE,
         'expected' => $negative_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DateTimePlus::createFromFormat('U', 3600),
         'input2' => DateTimePlus::createFromFormat('U', 0),
         'absolute' => TRUE,
         'expected' => $positive_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DateTimePlus::createFromFormat('U', 3600),
         'input2' => \DateTime::createFromFormat('U', 0),
         'absolute' => TRUE,
         'expected' => $positive_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DateTimePlus::createFromFormat('U', 0),
         'input2' => DateTimePlus::createFromFormat('U', 0),
         'absolute' => FALSE,
         'expected' => $empty_interval,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -656,18 +656,18 @@ public function providerTestDateDiff() {
    * @see DateTimePlusTest::testInvalidDateDiff()
    */
   public function providerTestInvalidDateDiff() {
-    return array(
-      array(
+    return [
+      [
         'input1' => DateTimePlus::createFromFormat('U', 3600),
         'input2' => '1970-01-01 00:00:00',
         'absolute' => FALSE,
-      ),
-      array(
+      ],
+      [
         'input1' => DateTimePlus::createFromFormat('U', 3600),
         'input2' => NULL,
         'absolute' => FALSE,
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php b/core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php
index c818bc6a77e52ad655b537943e6c5e7548da906a..8aa9d9ac128ec6ccaec7f1151c16140f8eeab69b 100644
--- a/core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php
+++ b/core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php
@@ -452,7 +452,7 @@ public function testGetWithFileInclude() {
    * @covers ::resolveServicesAndParameters
    */
   public function testGetForInstantiationWithVariousArgumentLengths() {
-    $args = array();
+    $args = [];
     for ($i = 0; $i < 12; $i++) {
       $instantiation_service = $this->container->get('service_test_instantiation_' . $i);
       $this->assertEquals($args, $instantiation_service->getArguments());
@@ -677,10 +677,10 @@ public function testInitializedForAliases() {
    * @dataProvider scopeExceptionTestProvider
    */
   public function testScopeFunctionsWithException($method, $argument) {
-    $callable = array(
+    $callable = [
       $this->container,
       $method,
-    );
+    ];
 
     $callable($argument);
   }
@@ -695,13 +695,13 @@ public function testScopeFunctionsWithException($method, $argument) {
    */
   public function scopeExceptionTestProvider() {
     $scope = $this->prophesize('\Symfony\Component\DependencyInjection\ScopeInterface')->reveal();
-    return array(
-      array('enterScope', 'test_scope'),
-      array('leaveScope', 'test_scope'),
-      array('hasScope', 'test_scope'),
-      array('isScopeActive', 'test_scope'),
-      array('addScope', $scope),
-    );
+    return [
+      ['enterScope', 'test_scope'],
+      ['leaveScope', 'test_scope'],
+      ['hasScope', 'test_scope'],
+      ['isScopeActive', 'test_scope'],
+      ['addScope', $scope],
+    ];
   }
 
   /**
@@ -729,7 +729,7 @@ public function testGetServiceIds() {
    */
   protected function getMockContainerDefinition() {
     $fake_service = new \stdClass();
-    $parameters = array();
+    $parameters = [];
     $parameters['some_parameter_class'] = get_class($fake_service);
     $parameters['some_private_config'] = 'really_private_lama';
     $parameters['some_config'] = 'foo';
@@ -738,262 +738,262 @@ protected function getMockContainerDefinition() {
     // Also test alias resolving.
     $parameters['service_from_parameter'] = $this->getServiceCall('service.provider_alias');
 
-    $services = array();
-    $services['service_container'] = array(
+    $services = [];
+    $services['service_container'] = [
       'class' => '\Drupal\service_container\DependencyInjection\Container',
-    );
-    $services['other.service'] = array(
+    ];
+    $services['other.service'] = [
       'class' => get_class($fake_service),
-    );
+    ];
 
-    $services['non_shared_service'] = array(
+    $services['non_shared_service'] = [
       'class' => get_class($fake_service),
       'shared' => FALSE,
-    );
+    ];
 
-    $services['other.service_class_from_parameter'] = array(
+    $services['other.service_class_from_parameter'] = [
       'class' => $this->getParameterCall('some_parameter_class'),
-    );
-    $services['late.service'] = array(
+    ];
+    $services['late.service'] = [
       'class' => get_class($fake_service),
-    );
-    $services['service.provider'] = array(
+    ];
+    $services['service.provider'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getServiceCall('other.service'),
         $this->getParameterCall('some_config'),
-      )),
-      'properties' => $this->getCollection(array('_someProperty' => 'foo')),
-      'calls' => array(
-        array('setContainer', $this->getCollection(array(
+      ]),
+      'properties' => $this->getCollection(['_someProperty' => 'foo']),
+      'calls' => [
+        ['setContainer', $this->getCollection([
           $this->getServiceCall('service_container'),
-        ))),
-        array('setOtherConfigParameter', $this->getCollection(array(
+        ])],
+        ['setOtherConfigParameter', $this->getCollection([
           $this->getParameterCall('some_other_config'),
-        ))),
-      ),
+        ])],
+      ],
       'priority' => 0,
-    );
+    ];
 
     // Test private services.
-    $private_service = array(
+    $private_service = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getServiceCall('other.service'),
         $this->getParameterCall('some_private_config'),
-      )),
+      ]),
       'public' => FALSE,
-    );
+    ];
 
-    $services['service_using_private'] = array(
+    $services['service_using_private'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getPrivateServiceCall(NULL, $private_service),
         $this->getParameterCall('some_config'),
-      )),
-    );
-    $services['another_service_using_private'] = array(
+      ]),
+    ];
+    $services['another_service_using_private'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getPrivateServiceCall(NULL, $private_service),
         $this->getParameterCall('some_config'),
-      )),
-    );
+      ]),
+    ];
 
     // Test shared private services.
     $id = 'private_service_shared_1';
 
-    $services['service_using_shared_private'] = array(
+    $services['service_using_shared_private'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getPrivateServiceCall($id, $private_service, TRUE),
         $this->getParameterCall('some_config'),
-      )),
-    );
-    $services['another_service_using_shared_private'] = array(
+      ]),
+    ];
+    $services['another_service_using_shared_private'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getPrivateServiceCall($id, $private_service, TRUE),
         $this->getParameterCall('some_config'),
-      )),
-    );
+      ]),
+    ];
 
     // Tests service with invalid argument.
-    $services['invalid_argument_service'] = array(
+    $services['invalid_argument_service'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         1, // Test passing non-strings, too.
-        (object) array(
+        (object) [
           'type' => 'invalid',
-        ),
-      )),
-    );
+        ],
+      ]),
+    ];
 
-    $services['invalid_arguments_service'] = array(
+    $services['invalid_arguments_service'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => (object) array(
+      'arguments' => (object) [
         'type' => 'invalid',
-      ),
-    );
+      ],
+    ];
 
     // Test service that needs deep-traversal.
-    $services['service_using_array'] = array(
+    $services['service_using_array'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
-        $this->getCollection(array(
+      'arguments' => $this->getCollection([
+        $this->getCollection([
           $this->getServiceCall('other.service'),
-        )),
+        ]),
         $this->getParameterCall('some_private_config'),
-      )),
-    );
+      ]),
+    ];
 
-    $services['service_with_optional_dependency'] = array(
+    $services['service_with_optional_dependency'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getServiceCall('service.does_not_exist', ContainerInterface::NULL_ON_INVALID_REFERENCE),
         $this->getParameterCall('some_private_config'),
-      )),
+      ]),
 
-    );
+    ];
 
-    $services['factory_service'] = array(
+    $services['factory_service'] = [
       'class' => '\Drupal\service_container\ServiceContainer\ControllerInterface',
-      'factory' => array(
+      'factory' => [
         $this->getServiceCall('service.provider'),
         'getFactoryMethod',
-      ),
-      'arguments' => $this->getCollection(array(
+      ],
+      'arguments' => $this->getCollection([
         $this->getParameterCall('factory_service_class'),
-      )),
-    );
-    $services['factory_class'] = array(
+      ]),
+    ];
+    $services['factory_class'] = [
       'class' => '\Drupal\service_container\ServiceContainer\ControllerInterface',
       'factory' => '\Drupal\Tests\Component\DependencyInjection\MockService::getFactoryMethod',
-      'arguments' => array(
+      'arguments' => [
         '\Drupal\Tests\Component\DependencyInjection\MockService',
-        array(NULL, 'bar'),
-      ),
-      'calls' => array(
-        array('setContainer', $this->getCollection(array(
+        [NULL, 'bar'],
+      ],
+      'calls' => [
+        ['setContainer', $this->getCollection([
           $this->getServiceCall('service_container'),
-        ))),
-      ),
-    );
+        ])],
+      ],
+    ];
 
-    $services['wrong_factory'] = array(
+    $services['wrong_factory'] = [
       'class' => '\Drupal\service_container\ServiceContainer\ControllerInterface',
-      'factory' => (object) array('I am not a factory, but I pretend to be.'),
-    );
+      'factory' => (object) ['I am not a factory, but I pretend to be.'],
+    ];
 
-    $services['circular_dependency'] = array(
+    $services['circular_dependency'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getServiceCall('circular_dependency'),
-      )),
-    );
-    $services['synthetic'] = array(
+      ]),
+    ];
+    $services['synthetic'] = [
       'synthetic' => TRUE,
-    );
+    ];
     // The file could have been named as a .php file. The reason it is a .data
     // file is that SimpleTest tries to load it. SimpleTest does not like such
     // fixtures and hence we use a neutral name like .data.
-    $services['container_test_file_service_test'] = array(
+    $services['container_test_file_service_test'] = [
       'class' => '\stdClass',
       'file' => __DIR__ . '/Fixture/container_test_file_service_test_service_function.data',
-    );
+    ];
 
     // Test multiple arguments.
-    $args = array();
+    $args = [];
     for ($i = 0; $i < 12; $i++) {
-      $services['service_test_instantiation_' . $i] = array(
+      $services['service_test_instantiation_' . $i] = [
         'class' => '\Drupal\Tests\Component\DependencyInjection\MockInstantiationService',
         // Also test a collection that does not need resolving.
         'arguments' => $this->getCollection($args, FALSE),
-      );
+      ];
       $args[] = 'arg_' . $i;
     }
 
-    $services['service_parameter_not_exists'] = array(
+    $services['service_parameter_not_exists'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getServiceCall('service.provider'),
         $this->getParameterCall('not_exists'),
-      )),
-    );
-    $services['service_dependency_not_exists'] = array(
+      ]),
+    ];
+    $services['service_dependency_not_exists'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getServiceCall('service_not_exists'),
         $this->getParameterCall('some_config'),
-      )),
-    );
+      ]),
+    ];
 
-    $services['service_with_parameter_service'] = array(
+    $services['service_with_parameter_service'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => $this->getCollection(array(
+      'arguments' => $this->getCollection([
         $this->getParameterCall('service_from_parameter'),
         // Also test deep collections that don't need resolving.
-        $this->getCollection(array(
+        $this->getCollection([
           1,
-        ), FALSE),
-      )),
-    );
+        ], FALSE),
+      ]),
+    ];
 
     // To ensure getAlternatives() finds something.
-    $services['service_not_exists_similar'] = array(
+    $services['service_not_exists_similar'] = [
       'synthetic' => TRUE,
-    );
+    ];
 
     // Test configurator.
-    $services['configurator'] = array(
+    $services['configurator'] = [
       'synthetic' => TRUE,
-    );
-    $services['configurable_service'] = array(
+    ];
+    $services['configurable_service'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => array(),
-      'configurator' => array(
+      'arguments' => [],
+      'configurator' => [
         $this->getServiceCall('configurator'),
         'configureService'
-      ),
-    );
-    $services['configurable_service_exception'] = array(
+      ],
+    ];
+    $services['configurable_service_exception'] = [
       'class' => '\Drupal\Tests\Component\DependencyInjection\MockService',
-      'arguments' => array(),
+      'arguments' => [],
       'configurator' => 'configurator_service_test_does_not_exist',
-    );
+    ];
 
-    $aliases = array();
+    $aliases = [];
     $aliases['service.provider_alias'] = 'service.provider';
     $aliases['late.service_alias'] = 'late.service';
 
-    return array(
+    return [
       'aliases' => $aliases,
       'parameters' => $parameters,
       'services' => $services,
       'frozen' => TRUE,
       'machine_format' => $this->machineFormat,
-    );
+    ];
   }
 
   /**
    * Helper function to return a service definition.
    */
   protected function getServiceCall($id, $invalid_behavior = ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE) {
-    return (object) array(
+    return (object) [
       'type' => 'service',
       'id' => $id,
       'invalidBehavior' => $invalid_behavior,
-    );
+    ];
   }
 
   /**
    * Helper function to return a service definition.
    */
   protected function getParameterCall($name) {
-    return (object) array(
+    return (object) [
       'type' => 'parameter',
       'name' => $name,
-    );
+    ];
   }
 
   /**
@@ -1004,23 +1004,23 @@ protected function getPrivateServiceCall($id, $service_definition, $shared = FAL
       $hash = Crypt::hashBase64(serialize($service_definition));
       $id = 'private__' . $hash;
     }
-    return (object) array(
+    return (object) [
       'type' => 'private_service',
       'id' => $id,
       'value' => $service_definition,
       'shared' => $shared,
-    );
+    ];
   }
 
   /**
    * Helper function to return a machine-optimized collection.
    */
   protected function getCollection($collection, $resolve = TRUE) {
-    return (object) array(
+    return (object) [
       'type' => 'collection',
       'value' => $collection,
       'resolve' => $resolve,
-    );
+    ];
   }
 
 }
@@ -1189,7 +1189,7 @@ public function getSomeOtherParameter() {
    * @return object
    *   The instantiated service object.
    */
-  public static function getFactoryMethod($class, $arguments = array()) {
+  public static function getFactoryMethod($class, $arguments = []) {
     $r = new \ReflectionClass($class);
     $service = ($r->getConstructor() === NULL) ? $r->newInstance() : $r->newInstanceArgs($arguments);
 
diff --git a/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php b/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
index 5a6b3190fe3eb520a192325285b1a8c68c1539ef..a899aaa391791ceaa95932c65bfc9e668a6e5b4a 100644
--- a/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
+++ b/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
@@ -62,15 +62,15 @@ class OptimizedPhpArrayDumperTest extends \PHPUnit_Framework_TestCase {
     protected function setUp() {
       // Setup a mock container builder.
       $this->containerBuilder = $this->prophesize('\Symfony\Component\DependencyInjection\ContainerBuilder');
-      $this->containerBuilder->getAliases()->willReturn(array());
+      $this->containerBuilder->getAliases()->willReturn([]);
       $this->containerBuilder->getParameterBag()->willReturn(new ParameterBag());
       $this->containerBuilder->getDefinitions()->willReturn(NULL);
       $this->containerBuilder->isFrozen()->willReturn(TRUE);
 
-      $definition = array();
-      $definition['aliases'] = array();
-      $definition['parameters'] = array();
-      $definition['services'] = array();
+      $definition = [];
+      $definition['aliases'] = [];
+      $definition['parameters'] = [];
+      $definition['services'] = [];
       $definition['frozen'] = TRUE;
       $definition['machine_format'] = $this->machineFormat;
 
@@ -114,17 +114,17 @@ public function testGetAliases($aliases, $definition_aliases) {
      *     - aliases as expected in the container definition.
      */
     public function getAliasesDataProvider() {
-      return array(
-        array(array(), array()),
-        array(
-          array('foo' => 'foo.alias'),
-          array('foo' => 'foo.alias'),
-        ),
-        array(
-          array('foo' => 'foo.alias', 'foo.alias' => 'foo.alias.alias'),
-          array('foo' => 'foo.alias.alias', 'foo.alias' => 'foo.alias.alias'),
-        ),
-      );
+      return [
+        [[], []],
+        [
+          ['foo' => 'foo.alias'],
+          ['foo' => 'foo.alias'],
+        ],
+        [
+          ['foo' => 'foo.alias', 'foo.alias' => 'foo.alias.alias'],
+          ['foo' => 'foo.alias.alias', 'foo.alias' => 'foo.alias.alias'],
+        ],
+      ];
     }
 
     /**
@@ -164,34 +164,34 @@ public function testGetParameters($parameters, $definition_parameters, $is_froze
      *     - frozen value
      */
     public function getParametersDataProvider() {
-      return array(
-        array(array(), array(), TRUE),
-        array(
-          array('foo' => 'value_foo'),
-          array('foo' => 'value_foo'),
+      return [
+        [[], [], TRUE],
+        [
+          ['foo' => 'value_foo'],
+          ['foo' => 'value_foo'],
           TRUE,
-        ),
-        array(
-          array('foo' => array('llama' => 'yes')),
-          array('foo' => array('llama' => 'yes')),
+        ],
+        [
+          ['foo' => ['llama' => 'yes']],
+          ['foo' => ['llama' => 'yes']],
           TRUE,
-        ),
-        array(
-          array('foo' => '%llama%', 'llama' => 'yes'),
-          array('foo' => '%%llama%%', 'llama' => 'yes'),
+        ],
+        [
+          ['foo' => '%llama%', 'llama' => 'yes'],
+          ['foo' => '%%llama%%', 'llama' => 'yes'],
           TRUE,
-        ),
-        array(
-          array('foo' => '%llama%', 'llama' => 'yes'),
-          array('foo' => '%llama%', 'llama' => 'yes'),
+        ],
+        [
+          ['foo' => '%llama%', 'llama' => 'yes'],
+          ['foo' => '%llama%', 'llama' => 'yes'],
           FALSE,
-        ),
-        array(
-          array('reference' => new Reference('referenced_service')),
-          array('reference' => $this->getServiceCall('referenced_service')),
+        ],
+        [
+          ['reference' => new Reference('referenced_service')],
+          ['reference' => $this->getServiceCall('referenced_service')],
           TRUE,
-        ),
-      );
+        ],
+      ];
     }
 
     /**
@@ -236,164 +236,164 @@ public function testGetServiceDefinitions($services, $definition_services) {
      *     - frozen value
      */
     public function getDefinitionsDataProvider() {
-      $base_service_definition = array(
+      $base_service_definition = [
         'class' => '\stdClass',
         'public' => TRUE,
         'file' => FALSE,
         'synthetic' => FALSE,
         'lazy' => FALSE,
-        'arguments' => array(),
+        'arguments' => [],
         'arguments_count' => 0,
-        'properties' => array(),
-        'calls' => array(),
+        'properties' => [],
+        'calls' => [],
         'scope' => ContainerInterface::SCOPE_CONTAINER,
         'shared' => TRUE,
         'factory' => FALSE,
         'configurator' => FALSE,
-      );
+      ];
 
       // Test basic flags.
-      $service_definitions[] = array() + $base_service_definition;
+      $service_definitions[] = [] + $base_service_definition;
 
-      $service_definitions[] = array(
+      $service_definitions[] = [
         'public' => FALSE,
-      ) + $base_service_definition;
+      ] + $base_service_definition;
 
-      $service_definitions[] = array(
+      $service_definitions[] = [
         'file' => 'test_include.php',
-      ) + $base_service_definition;
+      ] + $base_service_definition;
 
-      $service_definitions[] = array(
+      $service_definitions[] = [
         'synthetic' => TRUE,
-      ) + $base_service_definition;
+      ] + $base_service_definition;
 
-      $service_definitions[] = array(
+      $service_definitions[] = [
         'shared' => FALSE,
-      ) + $base_service_definition;
+      ] + $base_service_definition;
 
-      $service_definitions[] = array(
+      $service_definitions[] = [
         'lazy' => TRUE,
-      ) + $base_service_definition;
+      ] + $base_service_definition;
 
       // Test a basic public Reference.
-      $service_definitions[] = array(
-        'arguments' => array('foo', new Reference('bar')),
+      $service_definitions[] = [
+        'arguments' => ['foo', new Reference('bar')],
         'arguments_count' => 2,
-        'arguments_expected' => $this->getCollection(array('foo', $this->getServiceCall('bar'))),
-      ) + $base_service_definition;
+        'arguments_expected' => $this->getCollection(['foo', $this->getServiceCall('bar')]),
+      ] + $base_service_definition;
 
       // Test a public reference that should not throw an Exception.
       $reference = new Reference('bar', ContainerInterface::NULL_ON_INVALID_REFERENCE);
-      $service_definitions[] = array(
-        'arguments' => array($reference),
+      $service_definitions[] = [
+        'arguments' => [$reference],
         'arguments_count' => 1,
-        'arguments_expected' => $this->getCollection(array($this->getServiceCall('bar', ContainerInterface::NULL_ON_INVALID_REFERENCE))),
-      ) + $base_service_definition;
+        'arguments_expected' => $this->getCollection([$this->getServiceCall('bar', ContainerInterface::NULL_ON_INVALID_REFERENCE)]),
+      ] + $base_service_definition;
 
       // Test a private shared service, denoted by having a Reference.
-      $private_definition = array(
+      $private_definition = [
         'class' => '\stdClass',
         'public' => FALSE,
         'arguments_count' => 0,
-      );
+      ];
 
-      $service_definitions[] = array(
-        'arguments' => array('foo', new Reference('private_definition')),
+      $service_definitions[] = [
+        'arguments' => ['foo', new Reference('private_definition')],
         'arguments_count' => 2,
-        'arguments_expected' => $this->getCollection(array(
+        'arguments_expected' => $this->getCollection([
           'foo',
           $this->getPrivateServiceCall('private_definition', $private_definition, TRUE),
-        )),
-      ) + $base_service_definition;
+        ]),
+      ] + $base_service_definition;
 
       // Test a private non-shared service, denoted by having a Definition.
       $private_definition_object = new Definition('\stdClass');
       $private_definition_object->setPublic(FALSE);
 
-      $service_definitions[] = array(
-        'arguments' => array('foo', $private_definition_object),
+      $service_definitions[] = [
+        'arguments' => ['foo', $private_definition_object],
         'arguments_count' => 2,
-        'arguments_expected' => $this->getCollection(array(
+        'arguments_expected' => $this->getCollection([
           'foo',
           $this->getPrivateServiceCall(NULL, $private_definition),
-        )),
-      ) + $base_service_definition;
+        ]),
+      ] + $base_service_definition;
 
       // Test a deep collection without a reference.
-      $service_definitions[] = array(
-        'arguments' => array(array(array('foo'))),
+      $service_definitions[] = [
+        'arguments' => [[['foo']]],
         'arguments_count' => 1,
-      ) + $base_service_definition;
+      ] + $base_service_definition;
 
       // Test a deep collection with a reference to resolve.
-      $service_definitions[] = array(
-        'arguments' => array(array(new Reference('bar'))),
+      $service_definitions[] = [
+        'arguments' => [[new Reference('bar')]],
         'arguments_count' => 1,
-        'arguments_expected' => $this->getCollection(array($this->getCollection(array($this->getServiceCall('bar'))))),
-      ) + $base_service_definition;
+        'arguments_expected' => $this->getCollection([$this->getCollection([$this->getServiceCall('bar')])]),
+      ] + $base_service_definition;
 
       // Test a collection with a variable to resolve.
-      $service_definitions[] = array(
-        'arguments' => array(new Parameter('llama_parameter')),
+      $service_definitions[] = [
+        'arguments' => [new Parameter('llama_parameter')],
         'arguments_count' => 1,
-        'arguments_expected' => $this->getCollection(array($this->getParameterCall('llama_parameter'))),
-      ) + $base_service_definition;
+        'arguments_expected' => $this->getCollection([$this->getParameterCall('llama_parameter')]),
+      ] + $base_service_definition;
 
       // Test objects that have _serviceId property.
       $drupal_service = new \stdClass();
       $drupal_service->_serviceId = 'bar';
 
-      $service_definitions[] = array(
-        'arguments' => array($drupal_service),
+      $service_definitions[] = [
+        'arguments' => [$drupal_service],
         'arguments_count' => 1,
-        'arguments_expected' => $this->getCollection(array($this->getServiceCall('bar'))),
-      ) + $base_service_definition;
+        'arguments_expected' => $this->getCollection([$this->getServiceCall('bar')]),
+      ] + $base_service_definition;
 
       // Test getMethodCalls.
-      $calls = array(
-        array('method', $this->getCollection(array())),
-        array('method2', $this->getCollection(array())),
-      );
-      $service_definitions[] = array(
+      $calls = [
+        ['method', $this->getCollection([])],
+        ['method2', $this->getCollection([])],
+      ];
+      $service_definitions[] = [
         'calls' => $calls,
-      ) + $base_service_definition;
+      ] + $base_service_definition;
 
-      $service_definitions[] = array(
+      $service_definitions[] = [
         'scope' => ContainerInterface::SCOPE_PROTOTYPE,
         'shared' => FALSE,
-      ) + $base_service_definition;
+      ] + $base_service_definition;
 
-      $service_definitions[] = array(
+      $service_definitions[] = [
           'shared' => FALSE,
-        ) + $base_service_definition;
+        ] + $base_service_definition;
 
       // Test factory.
-      $service_definitions[] = array(
-        'factory' => array(new Reference('bar'), 'factoryMethod'),
-        'factory_expected' => array($this->getServiceCall('bar'), 'factoryMethod'),
-      ) + $base_service_definition;
+      $service_definitions[] = [
+        'factory' => [new Reference('bar'), 'factoryMethod'],
+        'factory_expected' => [$this->getServiceCall('bar'), 'factoryMethod'],
+      ] + $base_service_definition;
 
       // Test invalid factory - needed to test deep dumpValue().
-      $service_definitions[] = array(
-        'factory' => array(array('foo', 'llama'), 'factoryMethod'),
-      ) + $base_service_definition;
+      $service_definitions[] = [
+        'factory' => [['foo', 'llama'], 'factoryMethod'],
+      ] + $base_service_definition;
 
       // Test properties.
-      $service_definitions[] = array(
-        'properties' => array('_value' => 'llama'),
-      ) + $base_service_definition;
+      $service_definitions[] = [
+        'properties' => ['_value' => 'llama'],
+      ] + $base_service_definition;
 
       // Test configurator.
-      $service_definitions[] = array(
-        'configurator' => array(new Reference('bar'), 'configureService'),
-        'configurator_expected' => array($this->getServiceCall('bar'), 'configureService'),
-      ) + $base_service_definition;
+      $service_definitions[] = [
+        'configurator' => [new Reference('bar'), 'configureService'],
+        'configurator_expected' => [$this->getServiceCall('bar'), 'configureService'],
+      ] + $base_service_definition;
 
-      $services_provided = array();
-      $services_provided[] = array(
-        array(),
-        array(),
-      );
+      $services_provided = [];
+      $services_provided[] = [
+        [],
+        [],
+      ];
 
       foreach ($service_definitions as $service_definition) {
         $definition = $this->prophesize('\Symfony\Component\DependencyInjection\Definition');
@@ -412,7 +412,7 @@ public function getDefinitionsDataProvider() {
         $definition->getConfigurator()->willReturn($service_definition['configurator']);
 
         // Preserve order.
-        $filtered_service_definition = array();
+        $filtered_service_definition = [];
         foreach ($base_service_definition as $key => $value) {
           $filtered_service_definition[$key] = $service_definition[$key];
           unset($service_definition[$key]);
@@ -430,7 +430,7 @@ public function getDefinitionsDataProvider() {
         $filtered_service_definition += $service_definition;
 
         // Allow to set _expected values.
-        foreach (array('arguments', 'factory', 'configurator') as $key) {
+        foreach (['arguments', 'factory', 'configurator'] as $key) {
           $expected = $key . '_expected';
           if (isset($filtered_service_definition[$expected])) {
             $filtered_service_definition[$key] = $filtered_service_definition[$expected];
@@ -442,17 +442,17 @@ public function getDefinitionsDataProvider() {
         unset($filtered_service_definition['scope']);
 
         if (isset($filtered_service_definition['public']) && $filtered_service_definition['public'] === FALSE) {
-          $services_provided[] = array(
-            array('foo_service' => $definition->reveal()),
-            array(),
-          );
+          $services_provided[] = [
+            ['foo_service' => $definition->reveal()],
+            [],
+          ];
           continue;
         }
 
-        $services_provided[] = array(
-          array('foo_service' => $definition->reveal()),
-          array('foo_service' => $this->serializeDefinition($filtered_service_definition)),
-        );
+        $services_provided[] = [
+          ['foo_service' => $definition->reveal()],
+          ['foo_service' => $this->serializeDefinition($filtered_service_definition)],
+        ];
       }
 
       return $services_provided;
@@ -471,11 +471,11 @@ protected function serializeDefinition(array $service_definition) {
      * Helper function to return a service definition.
      */
     protected function getServiceCall($id, $invalid_behavior = ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE) {
-      return (object) array(
+      return (object) [
         'type' => 'service',
         'id' => $id,
         'invalidBehavior' => $invalid_behavior,
-      );
+      ];
     }
 
     /**
@@ -503,9 +503,9 @@ public function testGetServiceDefinitionWithInvalidScope() {
      */
     public function testGetServiceDefinitionWithReferenceToAlias($public) {
       $bar_definition = new Definition('\stdClass');
-      $bar_definition_php_array = array(
+      $bar_definition_php_array = [
         'class' => '\stdClass',
-      );
+      ];
       if (!$public) {
         $bar_definition->setPublic(FALSE);
         $bar_definition_php_array['public'] = FALSE;
@@ -531,21 +531,21 @@ public function testGetServiceDefinitionWithReferenceToAlias($public) {
       else {
         $service_definition = $this->getPrivateServiceCall('bar', $bar_definition_php_array, TRUE);
       }
-      $data = array(
+      $data = [
          'class' => '\stdClass',
-         'arguments' => $this->getCollection(array(
+         'arguments' => $this->getCollection([
            $service_definition,
-         )),
+         ]),
          'arguments_count' => 1,
-      );
+      ];
       $this->assertEquals($this->serializeDefinition($data), $dump['services']['foo'], 'Expected definition matches dump.');
     }
 
     public function publicPrivateDataProvider() {
-      return array(
-        array(TRUE),
-        array(FALSE),
-      );
+      return [
+        [TRUE],
+        [FALSE],
+      ];
     }
 
     /**
@@ -629,33 +629,33 @@ protected function getPrivateServiceCall($id, $service_definition, $shared = FAL
         $hash = Crypt::hashBase64(serialize($service_definition));
         $id = 'private__' . $hash;
       }
-      return (object) array(
+      return (object) [
         'type' => 'private_service',
         'id' => $id,
         'value' => $service_definition,
         'shared' => $shared,
-      );
+      ];
     }
 
     /**
      * Helper function to return a machine-optimized collection.
      */
     protected function getCollection($collection, $resolve = TRUE) {
-      return (object) array(
+      return (object) [
         'type' => 'collection',
         'value' => $collection,
         'resolve' => $resolve,
-      );
+      ];
     }
 
     /**
      * Helper function to return a parameter definition.
      */
     protected function getParameterCall($name) {
-      return (object) array(
+      return (object) [
         'type' => 'parameter',
         'name' => $name,
-      );
+      ];
     }
 
   }
diff --git a/core/tests/Drupal/Tests/Component/Discovery/YamlDiscoveryTest.php b/core/tests/Drupal/Tests/Component/Discovery/YamlDiscoveryTest.php
index 68b16eeb44da29e7c87c50292df6b34a31be84af..897a7889840af0ac4968b6e5c376aa135082053b 100644
--- a/core/tests/Drupal/Tests/Component/Discovery/YamlDiscoveryTest.php
+++ b/core/tests/Drupal/Tests/Component/Discovery/YamlDiscoveryTest.php
@@ -34,12 +34,12 @@ public function testDiscovery() {
     file_put_contents($url . '/test_2/test_4.test.yml', '');
 
     // Set up the directories to search.
-    $directories = array(
+    $directories = [
       'test_1' => $url . '/test_1',
       'test_2' => $url . '/test_1',
       'test_3' => $url . '/test_2',
       'test_4' => $url . '/test_2',
-    );
+    ];
 
     $discovery = new YamlDiscovery('test', $directories);
     $data = $discovery->findAll();
@@ -50,12 +50,12 @@ public function testDiscovery() {
     $this->assertArrayHasKey('test_3', $data);
     $this->assertArrayHasKey('test_4', $data);
 
-    foreach (array('test_1', 'test_2', 'test_3') as $key) {
+    foreach (['test_1', 'test_2', 'test_3'] as $key) {
       $this->assertArrayHasKey('name', $data[$key]);
       $this->assertEquals($data[$key]['name'], 'test');
     }
 
-    $this->assertSame(array(), $data['test_4']);
+    $this->assertSame([], $data['test_4']);
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/DrupalComponentTest.php b/core/tests/Drupal/Tests/Component/DrupalComponentTest.php
index 11ce86f08ad7deeaee0d6ab43930ac0d1d317b97..7e746d7379a6e97983953b366799c595d3aee9ac 100644
--- a/core/tests/Drupal/Tests/Component/DrupalComponentTest.php
+++ b/core/tests/Drupal/Tests/Component/DrupalComponentTest.php
@@ -42,7 +42,7 @@ public function testNoCoreInComponentTests() {
    *   An array of class paths.
    */
   protected function findPhpClasses($dir) {
-    $classes = array();
+    $classes = [];
     foreach (new \DirectoryIterator($dir) as $file) {
       if ($file->isDir() && !$file->isDot()) {
         $classes = array_merge($classes, $this->findPhpClasses($file->getPathname()));
@@ -80,26 +80,26 @@ protected function assertNoCoreUsage($class_path) {
    *   - File data as a string. This will be used as a virtual file.
    */
   public function providerAssertNoCoreUseage() {
-    return array(
-      array(
+    return [
+      [
         TRUE,
         '@see \\Drupal\\Core\\Something',
-      ),
-      array(
+      ],
+      [
         FALSE,
         '\\Drupal\\Core\\Something',
-      ),
-      array(
+      ],
+      [
         FALSE,
         "@see \\Drupal\\Core\\Something\n" .
         '\\Drupal\\Core\\Something',
-      ),
-      array(
+      ],
+      [
         FALSE,
         "\\Drupal\\Core\\Something\n" .
         '@see \\Drupal\\Core\\Something',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php b/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
index eab85b385aa61afabcf9744a5e650f94a22ee02f..e106fec379062352e2fc7d6cf3ee16ab09b22e82 100644
--- a/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
+++ b/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
@@ -48,22 +48,22 @@ public function testPluralsFormula($plural, $expected) {
    *   value.
    */
   public function providerTestPluralsFormula() {
-    return array(
-      array(
+    return [
+      [
         'nplurals=1; plural=0;',
-        array('default' => 0),
-      ),
-      array(
+        ['default' => 0],
+      ],
+      [
         'nplurals=2; plural=(n > 1);',
-        array(0 => 0, 1 => 0, 'default' => 1),
-      ),
-      array(
+        [0 => 0, 1 => 0, 'default' => 1],
+      ],
+      [
         'nplurals=2; plural=(n!=1);',
-        array(1 => 0, 'default' => 1),
-      ),
-      array(
+        [1 => 0, 'default' => 1],
+      ],
+      [
         'nplurals=2; plural=(((n==1)||((n%10)==1))?(0):1);',
-        array(
+        [
           1 => 0,
           11 => 0,
           21 => 0,
@@ -85,11 +85,11 @@ public function providerTestPluralsFormula() {
           181 => 0,
           191 => 0,
           'default' => 1,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'nplurals=3; plural=((((n%10)==1)&&((n%100)!=11))?(0):(((((n%10)>=2)&&((n%10)<=4))&&(((n%100)<10)||((n%100)>=20)))?(1):2));',
-        array(
+        [
           1 => 0,
           2 => 1,
           3 => 1,
@@ -163,21 +163,21 @@ public function providerTestPluralsFormula() {
           193 => 1,
           194 => 1,
           'default' => 2,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'nplurals=3; plural=((n==1)?(0):(((n>=2)&&(n<=4))?(1):2));',
-        array(
+        [
           1 => 0,
           2 => 1,
           3 => 1,
           4 => 1,
           'default' => 2,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'nplurals=3; plural=((n==1)?(0):(((n==0)||(((n%100)>0)&&((n%100)<20)))?(1):2));',
-        array(
+        [
           0 => 1,
           1 => 0,
           2 => 1,
@@ -218,11 +218,11 @@ public function providerTestPluralsFormula() {
           118 => 1,
           119 => 1,
           'default' => 2,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'nplurals=3; plural=((n==1)?(0):(((((n%10)>=2)&&((n%10)<=4))&&(((n%100)<10)||((n%100)>=20)))?(1):2));',
-        array(
+        [
           1 => 0,
           2 => 1,
           3 => 1,
@@ -279,10 +279,10 @@ public function providerTestPluralsFormula() {
           193 => 1,
           194 => 1,
           'default' => 2,
-        ),),
-      array(
+        ],],
+      [
         'nplurals=4; plural=(((n==1)||(n==11))?(0):(((n==2)||(n==12))?(1):(((n>2)&&(n<20))?(2):3)));',
-        array(
+        [
           1 => 0,
           2 => 1,
           3 => 2,
@@ -303,11 +303,11 @@ public function providerTestPluralsFormula() {
           18 => 2,
           19 => 2,
           'default' => 3,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'nplurals=4; plural=(((n%100)==1)?(0):(((n%100)==2)?(1):((((n%100)==3)||((n%100)==4))?(2):3)));',
-        array(
+        [
           1 => 0,
           2 => 1,
           3 => 2,
@@ -317,11 +317,11 @@ public function providerTestPluralsFormula() {
           103 => 2,
           104 => 2,
           'default' => 3,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'nplurals=5; plural=((n==1)?(0):((n==2)?(1):((n<7)?(2):((n<11)?(3):4))));',
-        array(
+        [
           0 => 2,
           1 => 0,
           2 => 1,
@@ -334,11 +334,11 @@ public function providerTestPluralsFormula() {
           9 => 3,
           10 => 3,
           'default' => 4,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'nplurals=6; plural=((n==1)?(0):((n==0)?(1):((n==2)?(2):((((n%100)>=3)&&((n%100)<=10))?(3):((((n%100)>=11)&&((n%100)<=99))?(4):5)))));',
-        array(
+        [
           0 => 1,
           1 => 0,
           2 => 2,
@@ -362,9 +362,9 @@ public function providerTestPluralsFormula() {
           109 => 3,
           110 => 3,
           'default' => 4,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Graph/GraphTest.php b/core/tests/Drupal/Tests/Component/Graph/GraphTest.php
index e17c7ff03f49006dba0be64c6e3472e7871da421..9c4a7a528896d55da72357c407080c16dffeeb4f 100644
--- a/core/tests/Drupal/Tests/Component/Graph/GraphTest.php
+++ b/core/tests/Drupal/Tests/Component/Graph/GraphTest.php
@@ -21,59 +21,59 @@ public function testDepthFirstSearch() {
     //       |     |     |
     //       |     |     |
     //       +---> 4 <-- 7      8 ---> 9
-    $graph = $this->normalizeGraph(array(
-      1 => array(2),
-      2 => array(3, 4),
-      3 => array(),
-      4 => array(3),
-      5 => array(6),
-      7 => array(4, 5),
-      8 => array(9),
-      9 => array(),
-    ));
+    $graph = $this->normalizeGraph([
+      1 => [2],
+      2 => [3, 4],
+      3 => [],
+      4 => [3],
+      5 => [6],
+      7 => [4, 5],
+      8 => [9],
+      9 => [],
+    ]);
     $graph_object = new Graph($graph);
     $graph = $graph_object->searchAndSort();
 
-    $expected_paths = array(
-      1 => array(2, 3, 4),
-      2 => array(3, 4),
-      3 => array(),
-      4 => array(3),
-      5 => array(6),
-      7 => array(4, 3, 5, 6),
-      8 => array(9),
-      9 => array(),
-    );
+    $expected_paths = [
+      1 => [2, 3, 4],
+      2 => [3, 4],
+      3 => [],
+      4 => [3],
+      5 => [6],
+      7 => [4, 3, 5, 6],
+      8 => [9],
+      9 => [],
+    ];
     $this->assertPaths($graph, $expected_paths);
 
-    $expected_reverse_paths = array(
-      1 => array(),
-      2 => array(1),
-      3 => array(2, 1, 4, 7),
-      4 => array(2, 1, 7),
-      5 => array(7),
-      7 => array(),
-      8 => array(),
-      9 => array(8),
-    );
+    $expected_reverse_paths = [
+      1 => [],
+      2 => [1],
+      3 => [2, 1, 4, 7],
+      4 => [2, 1, 7],
+      5 => [7],
+      7 => [],
+      8 => [],
+      9 => [8],
+    ];
     $this->assertReversePaths($graph, $expected_reverse_paths);
 
     // Assert that DFS didn't created "missing" vertexes automatically.
     $this->assertFalse(isset($graph[6]), 'Vertex 6 has not been created');
 
-    $expected_components = array(
-      array(1, 2, 3, 4, 5, 7),
-      array(8, 9),
-    );
+    $expected_components = [
+      [1, 2, 3, 4, 5, 7],
+      [8, 9],
+    ];
     $this->assertComponents($graph, $expected_components);
 
-    $expected_weights = array(
-      array(1, 2, 3),
-      array(2, 4, 3),
-      array(7, 4, 3),
-      array(7, 5),
-      array(8, 9),
-    );
+    $expected_weights = [
+      [1, 2, 3],
+      [2, 4, 3],
+      [7, 4, 3],
+      [7, 5],
+      [8, 9],
+    ];
     $this->assertWeights($graph, $expected_weights);
   }
 
@@ -87,10 +87,10 @@ public function testDepthFirstSearch() {
    *   The normalized version of a graph.
    */
   protected function normalizeGraph($graph) {
-    $normalized_graph = array();
+    $normalized_graph = [];
     foreach ($graph as $vertex => $edges) {
       // Create vertex even if it hasn't any edges.
-      $normalized_graph[$vertex] = array();
+      $normalized_graph[$vertex] = [];
       foreach ($edges as $edge) {
         $normalized_graph[$vertex]['edges'][$edge] = TRUE;
       }
@@ -110,7 +110,7 @@ protected function assertPaths($graph, $expected_paths) {
     foreach ($expected_paths as $vertex => $paths) {
       // Build an array with keys = $paths and values = TRUE.
       $expected = array_fill_keys($paths, TRUE);
-      $result = isset($graph[$vertex]['paths']) ? $graph[$vertex]['paths'] : array();
+      $result = isset($graph[$vertex]['paths']) ? $graph[$vertex]['paths'] : [];
       $this->assertEquals($expected, $result, sprintf('Expected paths for vertex %s: %s, got %s', $vertex, $this->displayArray($expected, TRUE), $this->displayArray($result, TRUE)));
     }
   }
@@ -128,7 +128,7 @@ protected function assertReversePaths($graph, $expected_reverse_paths) {
     foreach ($expected_reverse_paths as $vertex => $paths) {
       // Build an array with keys = $paths and values = TRUE.
       $expected = array_fill_keys($paths, TRUE);
-      $result = isset($graph[$vertex]['reverse_paths']) ? $graph[$vertex]['reverse_paths'] : array();
+      $result = isset($graph[$vertex]['reverse_paths']) ? $graph[$vertex]['reverse_paths'] : [];
       $this->assertEquals($expected, $result, sprintf('Expected reverse paths for vertex %s: %s, got %s', $vertex, $this->displayArray($expected, TRUE), $this->displayArray($result, TRUE)));
     }
   }
@@ -144,14 +144,14 @@ protected function assertReversePaths($graph, $expected_reverse_paths) {
   protected function assertComponents($graph, $expected_components) {
     $unassigned_vertices = array_fill_keys(array_keys($graph), TRUE);
     foreach ($expected_components as $component) {
-      $result_components = array();
+      $result_components = [];
       foreach ($component as $vertex) {
         $result_components[] = $graph[$vertex]['component'];
         unset($unassigned_vertices[$vertex]);
       }
       $this->assertEquals(1, count(array_unique($result_components)), sprintf('Expected one unique component for vertices %s, got %s', $this->displayArray($component), $this->displayArray($result_components)));
     }
-    $this->assertEquals(array(), $unassigned_vertices, sprintf('Vertices not assigned to a component: %s', $this->displayArray($unassigned_vertices, TRUE)));
+    $this->assertEquals([], $unassigned_vertices, sprintf('Vertices not assigned to a component: %s', $this->displayArray($unassigned_vertices, TRUE)));
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageReadOnlyTest.php b/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageReadOnlyTest.php
index eca12416df2686d7ac206e139e0b551e60c1a91d..8b8c95acd9e35b0ec5d54983ccf5663405062e95 100644
--- a/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageReadOnlyTest.php
+++ b/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageReadOnlyTest.php
@@ -33,15 +33,15 @@ class FileStorageReadOnlyTest extends PhpStorageTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->standardSettings = array(
+    $this->standardSettings = [
       'directory' => $this->directory,
       'bin' => 'test',
-    );
-    $this->readonlyStorage = array(
+    ];
+    $this->readonlyStorage = [
       'directory' => $this->directory,
       // Let this read from the bin where the other instance is writing.
       'bin' => 'test',
-    );
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php b/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
index 25a0ed00a46260433989452c7c56afe42d0271ce..a1a11ec38dba22af45ecfacb0b568b4e4b5f2ba2 100644
--- a/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
+++ b/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
@@ -24,10 +24,10 @@ class FileStorageTest extends PhpStorageTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->standardSettings = array(
+    $this->standardSettings = [
       'directory' => $this->directory,
       'bin' => 'test',
-    );
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFastFileStorageTest.php b/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFastFileStorageTest.php
index 726cd1c760f55206fd99ae7c0eb54b7b2a43b180..577241d472ac931d80d24ec84d5ba0b60350a1c7 100644
--- a/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFastFileStorageTest.php
+++ b/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFastFileStorageTest.php
@@ -19,7 +19,7 @@ class MTimeProtectedFastFileStorageTest extends MTimeProtectedFileStorageBase {
    * include the hacked file on the first try but the second test will change
    * the directory mtime and so on the second try the file will not be included.
    */
-  protected $expected = array(TRUE, FALSE);
+  protected $expected = [TRUE, FALSE];
 
   /**
    * The PHP storage class to test.
diff --git a/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFileStorageBase.php b/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFileStorageBase.php
index af9fa056a8363ba0103821bb9dd753d824c5a448..c36453c3280a991e0d79ae01e68a91855b6cd6fa 100644
--- a/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFileStorageBase.php
+++ b/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFileStorageBase.php
@@ -38,11 +38,11 @@ protected function setUp() {
 
     $this->secret = $this->randomMachineName();
 
-    $this->settings = array(
+    $this->settings = [
       'directory' => $this->directory,
       'bin' => 'test',
       'secret' => $this->secret,
-    );
+    ];
   }
 
   /**
@@ -90,7 +90,7 @@ public function testSecurity() {
 
     // Ensure the root directory for the bin has a .htaccess file denying web
     // access.
-    $this->assertSame(file_get_contents($expected_root_directory . '/.htaccess'), call_user_func(array($this->storageClass, 'htaccessLines')));
+    $this->assertSame(file_get_contents($expected_root_directory . '/.htaccess'), call_user_func([$this->storageClass, 'htaccessLines']));
 
     // Ensure that if the file is replaced with an untrusted one (due to another
     // script's file upload vulnerability), it does not get loaded. Since mtime
diff --git a/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFileStorageTest.php b/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFileStorageTest.php
index 15b75e723f99621b7891b555ae46210dd8126fcc..bc88c3345904407eb2e3b1aa5c5d1ecf38d8af8b 100644
--- a/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFileStorageTest.php
+++ b/core/tests/Drupal/Tests/Component/PhpStorage/MTimeProtectedFileStorageTest.php
@@ -18,7 +18,7 @@ class MTimeProtectedFileStorageTest extends MTimeProtectedFileStorageBase {
    * The default implementation protects against even the filemtime change so
    * both iterations will return FALSE.
    */
-  protected $expected = array(FALSE, FALSE);
+  protected $expected = [FALSE, FALSE];
 
   /**
    * The PHP storage class to test.
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php b/core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php
index 917379e4d94ebfe799d3b5d7aa795688ccde850a..f320c5544899459d22e88c39fab386f68131075f 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php
@@ -30,7 +30,7 @@ public function testGetContextValue($expected, $context_value, $is_required, $da
     // Mock a Context object.
     $mock_context = $this->getMockBuilder('Drupal\Component\Plugin\Context\Context')
       ->disableOriginalConstructor()
-      ->setMethods(array('getContextDefinition'))
+      ->setMethods(['getContextDefinition'])
       ->getMock();
 
     // If the context value exists, getContextValue() behaves like a normal
@@ -49,7 +49,7 @@ public function testGetContextValue($expected, $context_value, $is_required, $da
     else {
       // Create a mock definition.
       $mock_definition = $this->getMockBuilder('Drupal\Component\Plugin\Context\ContextDefinitionInterface')
-        ->setMethods(array('isRequired', 'getDataType'))
+        ->setMethods(['isRequired', 'getDataType'])
         ->getMockForAbstractClass();
 
       // Set expectation for isRequired().
@@ -87,7 +87,7 @@ public function testGetContextValue($expected, $context_value, $is_required, $da
    */
   public function testDefaultValue() {
     $mock_definition = $this->getMockBuilder('Drupal\Component\Plugin\Context\ContextDefinitionInterface')
-      ->setMethods(array('getDefaultValue'))
+      ->setMethods(['getDefaultValue'])
       ->getMockForAbstractClass();
 
     $mock_definition->expects($this->once())
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
index 5218ec2a79e43903a225eff1c70c186ff501c5a8..0f112fb2ef4e49270fc009e5fc0784e36aeb9e4d 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
@@ -21,11 +21,11 @@ class DiscoveryCachedTraitTest extends UnitTestCase {
    *   - Plugin name to query for.
    */
   public function providerGetDefinition() {
-    return array(
+    return [
       ['definition', [], ['plugin_name' => 'definition'], 'plugin_name'],
       ['definition', ['plugin_name' => 'definition'], [], 'plugin_name'],
       [NULL, ['plugin_name' => 'definition'], [], 'bad_plugin_name'],
-    );
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
index 9f747f91b199a4dce3aab32301038d9c8d223539..74a8c431291c58b665cfadcd83fbc7eadd431173 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
@@ -19,10 +19,10 @@ class DiscoveryTraitTest extends UnitTestCase {
    *   - Plugin ID to get, passed to doGetDefinition().
    */
   public function providerDoGetDefinition() {
-    return array(
+    return [
       ['definition', ['plugin_name' => 'definition'], 'plugin_name'],
       [NULL, ['plugin_name' => 'definition'], 'bad_plugin_name'],
-    );
+    ];
   }
 
   /**
@@ -51,9 +51,9 @@ public function testDoGetDefinition($expected, $definitions, $plugin_id) {
    *   - Plugin ID to get, passed to doGetDefinition().
    */
   public function providerDoGetDefinitionException() {
-    return array(
+    return [
       [FALSE, ['plugin_name' => 'definition'], 'bad_plugin_name'],
-    );
+    ];
   }
 
   /**
@@ -123,10 +123,10 @@ public function testGetDefinitionException($expected, $definitions, $plugin_id)
    *   - Plugin ID to look for.
    */
   public function providerHasDefinition() {
-    return array(
+    return [
       [TRUE, 'valid'],
       [FALSE, 'not_valid'],
-    );
+    ];
   }
 
   /**
@@ -135,16 +135,16 @@ public function providerHasDefinition() {
    */
   public function testHasDefinition($expected, $plugin_id) {
     $trait = $this->getMockBuilder('Drupal\Component\Plugin\Discovery\DiscoveryTrait')
-      ->setMethods(array('getDefinition'))
+      ->setMethods(['getDefinition'])
       ->getMockForTrait();
     // Set up our mocked getDefinition() to return TRUE for 'valid' and FALSE
     // for 'not_valid'.
     $trait->expects($this->once())
       ->method('getDefinition')
-      ->will($this->returnValueMap(array(
+      ->will($this->returnValueMap([
         ['valid', FALSE, TRUE],
         ['not_valid', FALSE, FALSE],
-      )));
+      ]));
     // Call hasDefinition().
     $this->assertSame(
       $expected,
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
index bdab19c7ef4e0298307bce31b3364532f94a0800..1828d73f36c9dabd118245877abd730acc4e17a5 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
@@ -23,7 +23,7 @@ class StaticDiscoveryDecoratorTest extends UnitTestCase {
    */
   public function getRegisterDefinitionsCallback() {
     $mock_callable = $this->getMockBuilder('\stdClass')
-      ->setMethods(array('registerDefinitionsCallback'))
+      ->setMethods(['registerDefinitionsCallback'])
       ->getMock();
     // Set expectations for the callback method.
     $mock_callable->expects($this->once())
@@ -62,7 +62,7 @@ public function testGetDefinition($expected, $has_register_definitions, $excepti
     // Mock our StaticDiscoveryDecorator.
     $mock_decorator = $this->getMockBuilder('Drupal\Component\Plugin\Discovery\StaticDiscoveryDecorator')
       ->disableOriginalConstructor()
-      ->setMethods(array('registeredDefintionCallback'))
+      ->setMethods(['registeredDefintionCallback'])
       ->getMock();
 
     // Set up the ::$registerDefinitions property.
@@ -72,7 +72,7 @@ public function testGetDefinition($expected, $has_register_definitions, $excepti
       // Set the callback object on the mocked decorator.
       $ref_register_definitions->setValue(
         $mock_decorator,
-        array($this->getRegisterDefinitionsCallback(), 'registerDefinitionsCallback')
+        [$this->getRegisterDefinitionsCallback(), 'registerDefinitionsCallback']
       );
     }
     else {
@@ -83,11 +83,11 @@ public function testGetDefinition($expected, $has_register_definitions, $excepti
     // Set up ::$definitions to an empty array.
     $ref_definitions = new \ReflectionProperty($mock_decorator, 'definitions');
     $ref_definitions->setAccessible(TRUE);
-    $ref_definitions->setValue($mock_decorator, array());
+    $ref_definitions->setValue($mock_decorator, []);
 
     // Mock a decorated object.
     $mock_decorated = $this->getMockBuilder('Drupal\Component\Plugin\Discovery\DiscoveryInterface')
-      ->setMethods(array('getDefinitions'))
+      ->setMethods(['getDefinitions'])
       ->getMockForAbstractClass();
     // Return our definitions from getDefinitions().
     $mock_decorated->expects($this->once())
@@ -132,7 +132,7 @@ public function testGetDefinitions($has_register_definitions, $definitions) {
     // Mock our StaticDiscoveryDecorator.
     $mock_decorator = $this->getMockBuilder('Drupal\Component\Plugin\Discovery\StaticDiscoveryDecorator')
       ->disableOriginalConstructor()
-      ->setMethods(array('registeredDefintionCallback'))
+      ->setMethods(['registeredDefintionCallback'])
       ->getMock();
 
     // Set up the ::$registerDefinitions property.
@@ -142,7 +142,7 @@ public function testGetDefinitions($has_register_definitions, $definitions) {
       // Set the callback object on the mocked decorator.
       $ref_register_definitions->setValue(
         $mock_decorator,
-        array($this->getRegisterDefinitionsCallback(), 'registerDefinitionsCallback')
+        [$this->getRegisterDefinitionsCallback(), 'registerDefinitionsCallback']
       );
     }
     else {
@@ -153,11 +153,11 @@ public function testGetDefinitions($has_register_definitions, $definitions) {
     // Set up ::$definitions to an empty array.
     $ref_definitions = new \ReflectionProperty($mock_decorator, 'definitions');
     $ref_definitions->setAccessible(TRUE);
-    $ref_definitions->setValue($mock_decorator, array());
+    $ref_definitions->setValue($mock_decorator, []);
 
     // Mock a decorated object.
     $mock_decorated = $this->getMockBuilder('Drupal\Component\Plugin\Discovery\DiscoveryInterface')
-      ->setMethods(array('getDefinitions'))
+      ->setMethods(['getDefinitions'])
       ->getMockForAbstractClass();
     // Our mocked method will return any arguments sent to it.
     $mock_decorated->expects($this->once())
@@ -199,7 +199,7 @@ public function providerCall() {
   public function testCall($method, $args) {
     // Mock a decorated object.
     $mock_decorated = $this->getMockBuilder('Drupal\Component\Plugin\Discovery\DiscoveryInterface')
-      ->setMethods(array($method))
+      ->setMethods([$method])
       ->getMockForAbstractClass();
     // Our mocked method will return any arguments sent to it.
     $mock_decorated->expects($this->once())
@@ -222,7 +222,7 @@ function () {
     // Exercise __call.
     $this->assertArrayEquals(
       $args,
-      \call_user_func_array(array($mock_decorated, $method), $args)
+      \call_user_func_array([$mock_decorated, $method], $args)
     );
   }
 
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php b/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
index 8130b2df206d76827826de5d883cb39b19a67043..c6a0adf8596dc568ed56ee6a664733f614a9cf88 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
@@ -88,7 +88,7 @@ public function providerGetInstanceArguments() {
   public function testCreateInstance($expected, $reflector_name, $plugin_id, $plugin_definition, $configuration) {
     // Create a mock DiscoveryInterface which can return our plugin definition.
     $mock_discovery = $this->getMockBuilder('Drupal\Component\Plugin\Discovery\DiscoveryInterface')
-      ->setMethods(array('getDefinition', 'getDefinitions', 'hasDefinition'))
+      ->setMethods(['getDefinition', 'getDefinitions', 'hasDefinition'])
       ->getMock();
     $mock_discovery->expects($this->never())->method('getDefinitions');
     $mock_discovery->expects($this->never())->method('hasDefinition');
diff --git a/core/tests/Drupal/Tests/Component/Plugin/PluginBaseTest.php b/core/tests/Drupal/Tests/Component/Plugin/PluginBaseTest.php
index 600993205fb4a3188ecdbaecc847bfbbcb16af44..0ef8451aba27eebdbd02842bb8aa75c37b9da590 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/PluginBaseTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/PluginBaseTest.php
@@ -15,11 +15,11 @@ class PluginBaseTest extends UnitTestCase {
    * @covers ::getPluginId
    */
   public function testGetPluginId($plugin_id, $expected) {
-    $plugin_base = $this->getMockForAbstractClass('Drupal\Component\Plugin\PluginBase', array(
-      array(),
+    $plugin_base = $this->getMockForAbstractClass('Drupal\Component\Plugin\PluginBase', [
+      [],
       $plugin_id,
-      array(),
-    ));
+      [],
+    ]);
 
     $this->assertEquals($expected, $plugin_base->getPluginId());
   }
@@ -30,10 +30,10 @@ public function testGetPluginId($plugin_id, $expected) {
    * @return array
    */
   public function providerTestGetPluginId() {
-    return array(
-      array('base_id', 'base_id'),
-      array('base_id:derivative', 'base_id:derivative'),
-    );
+    return [
+      ['base_id', 'base_id'],
+      ['base_id:derivative', 'base_id:derivative'],
+    ];
   }
 
   /**
@@ -42,11 +42,11 @@ public function providerTestGetPluginId() {
    */
   public function testGetBaseId($plugin_id, $expected) {
     /** @var \Drupal\Component\Plugin\PluginBase|\PHPUnit_Framework_MockObject_MockObject $plugin_base */
-    $plugin_base = $this->getMockForAbstractClass('Drupal\Component\Plugin\PluginBase', array(
-      array(),
+    $plugin_base = $this->getMockForAbstractClass('Drupal\Component\Plugin\PluginBase', [
+      [],
       $plugin_id,
-      array(),
-    ));
+      [],
+    ]);
 
     $this->assertEquals($expected, $plugin_base->getBaseId());
   }
@@ -57,10 +57,10 @@ public function testGetBaseId($plugin_id, $expected) {
    * @return array
    */
   public function providerTestGetBaseId() {
-    return array(
-      array('base_id', 'base_id'),
-      array('base_id:derivative', 'base_id'),
-    );
+    return [
+      ['base_id', 'base_id'],
+      ['base_id:derivative', 'base_id'],
+    ];
   }
 
 
@@ -70,11 +70,11 @@ public function providerTestGetBaseId() {
    */
   public function testGetDerivativeId($plugin_id = NULL, $expected = NULL) {
     /** @var \Drupal\Component\Plugin\PluginBase|\PHPUnit_Framework_MockObject_MockObject $plugin_base */
-    $plugin_base = $this->getMockForAbstractClass('Drupal\Component\Plugin\PluginBase', array(
-      array(),
+    $plugin_base = $this->getMockForAbstractClass('Drupal\Component\Plugin\PluginBase', [
+      [],
       $plugin_id,
-      array(),
-    ));
+      [],
+    ]);
 
     $this->assertEquals($expected, $plugin_base->getDerivativeId());
   }
@@ -85,23 +85,23 @@ public function testGetDerivativeId($plugin_id = NULL, $expected = NULL) {
    * @return array
    */
   public function providerTestGetDerivativeId() {
-    return array(
-      array('base_id', NULL),
-      array('base_id:derivative', 'derivative'),
-    );
+    return [
+      ['base_id', NULL],
+      ['base_id:derivative', 'derivative'],
+    ];
   }
 
   /**
    * @covers ::getPluginDefinition
    */
   public function testGetPluginDefinition() {
-    $plugin_base = $this->getMockForAbstractClass('Drupal\Component\Plugin\PluginBase', array(
-      array(),
+    $plugin_base = $this->getMockForAbstractClass('Drupal\Component\Plugin\PluginBase', [
+      [],
       'plugin_id',
-      array('value', array('key' => 'value')),
-    ));
+      ['value', ['key' => 'value']],
+    ]);
 
-    $this->assertEquals(array('value', array('key' => 'value')), $plugin_base->getPluginDefinition());
+    $this->assertEquals(['value', ['key' => 'value']], $plugin_base->getPluginDefinition());
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Plugin/PluginManagerBaseTest.php b/core/tests/Drupal/Tests/Component/Plugin/PluginManagerBaseTest.php
index 608479a9493a3d855adfc489217280309e284064..24a7b089e71c87fbbf6e2870f9d5abbaaa7acf34 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/PluginManagerBaseTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/PluginManagerBaseTest.php
@@ -21,10 +21,10 @@ public function createInstanceCallback() {
     if ('invalid' == $plugin_id) {
       throw new PluginNotFoundException($plugin_id);
     }
-    return array(
+    return [
       'plugin_id' => $plugin_id,
       'configuration' => $configuration,
-    );
+    ];
   }
 
   /**
@@ -32,11 +32,11 @@ public function createInstanceCallback() {
    */
   public function getMockFactoryInterface($expects_count) {
     $mock_factory = $this->getMockBuilder('Drupal\Component\Plugin\Factory\FactoryInterface')
-      ->setMethods(array('createInstance'))
+      ->setMethods(['createInstance'])
       ->getMockForAbstractClass();
     $mock_factory->expects($this->exactly($expects_count))
       ->method('createInstance')
-      ->willReturnCallback(array($this, 'createInstanceCallback'));
+      ->willReturnCallback([$this, 'createInstanceCallback']);
     return $mock_factory;
   }
 
@@ -55,7 +55,7 @@ public function testCreateInstance() {
     $factory_ref->setValue($manager, $this->getMockFactoryInterface(1));
 
     // Finally the test.
-    $configuration_array = array('config' => 'something');
+    $configuration_array = ['config' => 'something'];
     $result = $manager->createInstance('valid', $configuration_array);
     $this->assertEquals('valid', $result['plugin_id']);
     $this->assertArrayEquals($configuration_array, $result['configuration']);
@@ -75,7 +75,7 @@ public function testCreateInstanceFallback() {
     $factory_ref->setAccessible(TRUE);
 
     // Set up the configuration array.
-    $configuration_array = array('config' => 'something');
+    $configuration_array = ['config' => 'something'];
 
     // Test with fallback interface and valid plugin_id.
     $factory_ref->setValue($manager, $this->getMockFactoryInterface(1));
diff --git a/core/tests/Drupal/Tests/Component/Plugin/StubFallbackPluginManager.php b/core/tests/Drupal/Tests/Component/Plugin/StubFallbackPluginManager.php
index 8dc4f08753a5055b7deded987cd7b6c3acf16769..50283c6614b539ce8d86bf5c1de04bcda8e0d960 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/StubFallbackPluginManager.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/StubFallbackPluginManager.php
@@ -20,7 +20,7 @@ class StubFallbackPluginManager extends PluginManagerBase implements FallbackPlu
   /**
    * {@inheritdoc}
    */
-  public function getFallbackPluginId($plugin_id, array $configuration = array()) {
+  public function getFallbackPluginId($plugin_id, array $configuration = []) {
     // Minimally implement getFallbackPluginId so that we can test it.
     return $plugin_id . '_fallback';
   }
diff --git a/core/tests/Drupal/Tests/Component/ProxyBuilder/ProxyBuilderTest.php b/core/tests/Drupal/Tests/Component/ProxyBuilder/ProxyBuilderTest.php
index f81ca0da4029400fbd9732cc858c8dc17f98ce95..30bf310500789aaab71482afe2b8e0452149792c 100644
--- a/core/tests/Drupal/Tests/Component/ProxyBuilder/ProxyBuilderTest.php
+++ b/core/tests/Drupal/Tests/Component/ProxyBuilder/ProxyBuilderTest.php
@@ -381,7 +381,7 @@ public function methodWithParameter($parameter) {
 
 class TestServiceComplexMethod {
 
-  public function complexMethod($parameter, callable $function, TestServiceNoMethod $test_service = NULL, array &$elements = array()) {
+  public function complexMethod($parameter, callable $function, TestServiceNoMethod $test_service = NULL, array &$elements = []) {
 
   }
 
diff --git a/core/tests/Drupal/Tests/Component/Render/HtmlEscapedTextTest.php b/core/tests/Drupal/Tests/Component/Render/HtmlEscapedTextTest.php
index fa6c325d01ad1cb13ad21a175476de015395cf6f..bdbe2b3cc8c9b5b50cb121c0870dd565b50a76d8 100644
--- a/core/tests/Drupal/Tests/Component/Render/HtmlEscapedTextTest.php
+++ b/core/tests/Drupal/Tests/Component/Render/HtmlEscapedTextTest.php
@@ -33,21 +33,21 @@ public function testToString($text, $expected, $message) {
    */
   function providerToString() {
     // Checks that invalid multi-byte sequences are escaped.
-    $tests[] = array("Foo\xC0barbaz", 'Foo�barbaz', 'Escapes invalid sequence "Foo\xC0barbaz"');
-    $tests[] = array("\xc2\"", '�&quot;', 'Escapes invalid sequence "\xc2\""');
-    $tests[] = array("Fooÿñ", "Fooÿñ", 'Does not escape valid sequence "Fooÿñ"');
+    $tests[] = ["Foo\xC0barbaz", 'Foo�barbaz', 'Escapes invalid sequence "Foo\xC0barbaz"'];
+    $tests[] = ["\xc2\"", '�&quot;', 'Escapes invalid sequence "\xc2\""'];
+    $tests[] = ["Fooÿñ", "Fooÿñ", 'Does not escape valid sequence "Fooÿñ"'];
 
     // Checks that special characters are escaped.
     $script_tag = $this->prophesize(MarkupInterface::class);
     $script_tag->__toString()->willReturn('<script>');
     $script_tag = $script_tag->reveal();
-    $tests[] = array($script_tag, '&lt;script&gt;', 'Escapes &lt;script&gt; even inside an object that implements MarkupInterface.');
-    $tests[] = array("<script>", '&lt;script&gt;', 'Escapes &lt;script&gt;');
-    $tests[] = array('<>&"\'', '&lt;&gt;&amp;&quot;&#039;', 'Escapes reserved HTML characters.');
+    $tests[] = [$script_tag, '&lt;script&gt;', 'Escapes &lt;script&gt; even inside an object that implements MarkupInterface.'];
+    $tests[] = ["<script>", '&lt;script&gt;', 'Escapes &lt;script&gt;'];
+    $tests[] = ['<>&"\'', '&lt;&gt;&amp;&quot;&#039;', 'Escapes reserved HTML characters.'];
     $specialchars = $this->prophesize(MarkupInterface::class);
     $specialchars->__toString()->willReturn('<>&"\'');
     $specialchars = $specialchars->reveal();
-    $tests[] = array($specialchars, '&lt;&gt;&amp;&quot;&#039;', 'Escapes reserved HTML characters even inside an object that implements MarkupInterface.');
+    $tests[] = [$specialchars, '&lt;&gt;&amp;&quot;&#039;', 'Escapes reserved HTML characters even inside an object that implements MarkupInterface.'];
 
     return $tests;
   }
diff --git a/core/tests/Drupal/Tests/Component/Serialization/JsonTest.php b/core/tests/Drupal/Tests/Component/Serialization/JsonTest.php
index 9898a5fb9e946c997713794ace244c8d67ba757a..65552cf5121da12b45a9644ff52535188aa986b7 100644
--- a/core/tests/Drupal/Tests/Component/Serialization/JsonTest.php
+++ b/core/tests/Drupal/Tests/Component/Serialization/JsonTest.php
@@ -48,9 +48,9 @@ protected function setUp() {
 
     // Characters that must be escaped.
     // We check for unescaped " separately.
-    $this->htmlUnsafe = array('<', '>', '\'', '&');
+    $this->htmlUnsafe = ['<', '>', '\'', '&'];
     // The following are the encoded forms of: < > ' & "
-    $this->htmlUnsafeEscaped = array('\u003C', '\u003E', '\u0027', '\u0026', '\u0022');
+    $this->htmlUnsafeEscaped = ['\u003C', '\u003E', '\u0027', '\u0026', '\u0022'];
   }
 
   /**
@@ -100,7 +100,7 @@ public function testReversibility() {
   public function testStructuredReversibility() {
     // Verify reversibility for structured data. Also verify that necessary
     // characters are escaped.
-    $source = array(TRUE, FALSE, 0, 1, '0', '1', $this->string, array('key1' => $this->string, 'key2' => array('nested' => TRUE)));
+    $source = [TRUE, FALSE, 0, 1, '0', '1', $this->string, ['key1' => $this->string, 'key2' => ['nested' => TRUE]]];
     $json = Json::encode($source);
     foreach ($this->htmlUnsafe as $char) {
       $this->assertTrue(strpos($json, $char) === FALSE, sprintf('A JSON encoded string does not contain %s.', $char));
diff --git a/core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php b/core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php
index a3c534aea6c6dd0d7ad6f201d482402fe9d50986..243fcfd20cdd735feb5e7ea234c6728e693bdd55 100644
--- a/core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php
+++ b/core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php
@@ -40,32 +40,32 @@ public function testRemoveDiacritics($original, $expected) {
    *   self::testRemoveDiacritics().
    */
   public function providerTestPhpTransliterationRemoveDiacritics() {
-    return array(
+    return [
       // Test all characters in the Unicode range 0x00bf to 0x017f.
-      array('ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏ', 'AAAAAAÆCEEEEIIII'),
-      array('ÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞß', 'ÐNOOOOO×OUUUUYÞß'),
-      array('àáâãäåæçèéêëìíîï', 'aaaaaaæceeeeiiii'),
-      array('ðñòóôõö÷øùúûüýþÿ', 'ðnooooo÷ouuuuyþy'),
-      array('ĀāĂ㥹ĆćĈĉĊċČčĎď', 'AaAaAaCcCcCcCcDd'),
-      array('ĐđĒēĔĕĖėĘęĚěĜĝĞğ', 'DdEeEeEeEeEeGgGg'),
-      array('ĠġĢģĤĥĦħĨĩĪīĬĭĮį', 'GgGgHhHhIiIiIiIi'),
-      array('İıIJijĴĵĶķĸĹĺĻļĽľĿ', 'IiIJijJjKkĸLlLlLlL'),
-      array('ŀŁłŃńŅņŇňʼnŊŋŌōŎŏ', 'lLlNnNnNnʼnŊŋOoOo'),
-      array('ŐőŒœŔŕŖŗŘřŚśŜŝŞş', 'OoŒœRrRrRrSsSsSs'),
-      array('ŠšŢţŤťŦŧŨũŪūŬŭŮů', 'SsTtTtTtUuUuUuUu'),
-      array('ŰűŲųŴŵŶŷŸŹźŻżŽž', 'UuUuWwYyYZzZzZz'),
+      ['ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏ', 'AAAAAAÆCEEEEIIII'],
+      ['ÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞß', 'ÐNOOOOO×OUUUUYÞß'],
+      ['àáâãäåæçèéêëìíîï', 'aaaaaaæceeeeiiii'],
+      ['ðñòóôõö÷øùúûüýþÿ', 'ðnooooo÷ouuuuyþy'],
+      ['ĀāĂ㥹ĆćĈĉĊċČčĎď', 'AaAaAaCcCcCcCcDd'],
+      ['ĐđĒēĔĕĖėĘęĚěĜĝĞğ', 'DdEeEeEeEeEeGgGg'],
+      ['ĠġĢģĤĥĦħĨĩĪīĬĭĮį', 'GgGgHhHhIiIiIiIi'],
+      ['İıIJijĴĵĶķĸĹĺĻļĽľĿ', 'IiIJijJjKkĸLlLlLlL'],
+      ['ŀŁłŃńŅņŇňʼnŊŋŌōŎŏ', 'lLlNnNnNnʼnŊŋOoOo'],
+      ['ŐőŒœŔŕŖŗŘřŚśŜŝŞş', 'OoŒœRrRrRrSsSsSs'],
+      ['ŠšŢţŤťŦŧŨũŪūŬŭŮů', 'SsTtTtTtUuUuUuUu'],
+      ['ŰűŲųŴŵŶŷŸŹźŻżŽž', 'UuUuWwYyYZzZzZz'],
 
       // Test all characters in the Unicode range 0x01CD to 0x024F.
-      array('ǍǎǏ', 'AaI'),
-      array('ǐǑǒǓǔǕǖǗǘǙǚǛǜǝǞǟ', 'iOoUuUuUuUuUuǝAa'),
-      array('ǠǡǢǣǤǥǦǧǨǩǪǫǬǭǮǯ', 'AaǢǣGgGgKkOoOoǮǯ'),
-      array('ǰDZDzdzǴǵǶǷǸǹǺǻǼǽǾǿ', 'jDZDzdzGgǶǷNnAaǼǽOo'),
-      array('ȀȁȂȃȄȅȆȇȈȉȊȋȌȍȎȏ', 'AaAaEeEeIiIiOoOo'),
-      array('ȐȑȒȓȔȕȖȗȘșȚțȜȝȞȟ', 'RrRrUuUuSsTtȜȝHh'),
-      array('ȠȡȢȣȤȥȦȧȨȩȪȫȬȭȮȯ', 'ȠȡȢȣZzAaEeOoOoOo'),
-      array('ȰȱȲȳȴȵȶȷȸȹȺȻȼȽȾȿ', 'OoYylntjȸȹACcLTs'),
-      array('ɀɁɂɃɄɅɆɇɈɉɊɋɌɍɎɏ', 'zɁɂBUɅEeJjQqRrYy'),
-    );
+      ['ǍǎǏ', 'AaI'],
+      ['ǐǑǒǓǔǕǖǗǘǙǚǛǜǝǞǟ', 'iOoUuUuUuUuUuǝAa'],
+      ['ǠǡǢǣǤǥǦǧǨǩǪǫǬǭǮǯ', 'AaǢǣGgGgKkOoOoǮǯ'],
+      ['ǰDZDzdzǴǵǶǷǸǹǺǻǼǽǾǿ', 'jDZDzdzGgǶǷNnAaǼǽOo'],
+      ['ȀȁȂȃȄȅȆȇȈȉȊȋȌȍȎȏ', 'AaAaEeEeIiIiOoOo'],
+      ['ȐȑȒȓȔȕȖȗȘșȚțȜȝȞȟ', 'RrRrUuUuSsTtȜȝHh'],
+      ['ȠȡȢȣȤȥȦȧȨȩȪȫȬȭȮȯ', 'ȠȡȢȣZzAaEeOoOoOo'],
+      ['ȰȱȲȳȴȵȶȷȸȹȺȻȼȽȾȿ', 'OoYylntjȸȹACcLTs'],
+      ['ɀɁɂɃɄɅɆɇɈɉɊɋɌɍɎɏ', 'zɁɂBUɅEeJjQqRrYy'],
+    ];
   }
 
   /**
@@ -117,36 +117,36 @@ public function providerTestPhpTransliteration() {
     // They are not in our tables, but should at least give us '?' (unknown).
     $five_byte = html_entity_decode('&#x10330;&#x10338;', ENT_NOQUOTES, 'UTF-8');
 
-    return array(
+    return [
       // Each test case is (language code, input, output).
       // Test ASCII in English.
-      array('en', $random, $random),
+      ['en', $random, $random],
       // Test ASCII in some other language with no overrides.
-      array('fr', $random, $random),
+      ['fr', $random, $random],
       // Test 3 and 4-byte characters in a language without overrides.
       // Note: if the data tables change, these will need to change too! They
       // are set up to test that data table loading works, so values come
       // directly from the data files.
-      array('fr', $three_byte, 'c'),
-      array('fr', $four_byte, 'wii'),
+      ['fr', $three_byte, 'c'],
+      ['fr', $four_byte, 'wii'],
       // Test 5-byte characters.
-      array('en', $five_byte, '??'),
+      ['en', $five_byte, '??'],
       // Test a language with no overrides.
-      array('en', $two_byte, 'A O U A O aouaohello'),
+      ['en', $two_byte, 'A O U A O aouaohello'],
       // Test language overrides provided by core.
-      array('de', $two_byte, 'Ae Oe Ue A O aeoeueaohello'),
-      array('de', $random, $random),
-      array('dk', $two_byte, 'A O U Aa Oe aouaaoehello'),
-      array('dk', $random, $random),
-      array('kg', $three_byte, 'ts'),
+      ['de', $two_byte, 'Ae Oe Ue A O aeoeueaohello'],
+      ['de', $random, $random],
+      ['dk', $two_byte, 'A O U Aa Oe aouaaoehello'],
+      ['dk', $random, $random],
+      ['kg', $three_byte, 'ts'],
       // Test strings in some other languages.
       // Turkish, provided by drupal.org user Kartagis.
-      array('tr', 'Abayı serdiler bize. Söyleyeceğim yüzlerine. Sanırım hepimiz aynı şeyi düşünüyoruz.', 'Abayi serdiler bize. Soyleyecegim yuzlerine. Sanirim hepimiz ayni seyi dusunuyoruz.'),
+      ['tr', 'Abayı serdiler bize. Söyleyeceğim yüzlerine. Sanırım hepimiz aynı şeyi düşünüyoruz.', 'Abayi serdiler bize. Soyleyecegim yuzlerine. Sanirim hepimiz ayni seyi dusunuyoruz.'],
       // Illegal/unknown unicode.
-      array('en', chr(0xF8) . chr(0x80) . chr(0x80) . chr(0x80) . chr(0x80), '?'),
+      ['en', chr(0xF8) . chr(0x80) . chr(0x80) . chr(0x80) . chr(0x80), '?'],
       // Max length.
-      array('de', $two_byte, 'Ae Oe', '?', 5),
-    );
+      ['de', $two_byte, 'Ae Oe', '?', 5],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/Utility/BytesTest.php b/core/tests/Drupal/Tests/Component/Utility/BytesTest.php
index f4ebf0e67d34e713bba70864f25c35d1b0919f3f..35872ac4bbe6c44d97068a46336dc347e676ad83 100644
--- a/core/tests/Drupal/Tests/Component/Utility/BytesTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/BytesTest.php
@@ -40,21 +40,21 @@ public function testToInt($size, $expected_int) {
    *   value.
    */
   public function providerTestToInt() {
-    return array(
-      array('1', 1),
-      array('1 byte', 1),
-      array('1 KB'  , Bytes::KILOBYTE),
-      array('1 MB'  , pow(Bytes::KILOBYTE, 2)),
-      array('1 GB'  , pow(Bytes::KILOBYTE, 3)),
-      array('1 TB'  , pow(Bytes::KILOBYTE, 4)),
-      array('1 PB'  , pow(Bytes::KILOBYTE, 5)),
-      array('1 EB'  , pow(Bytes::KILOBYTE, 6)),
-      array('1 ZB'  , pow(Bytes::KILOBYTE, 7)),
-      array('1 YB'  , pow(Bytes::KILOBYTE, 8)),
-      array('23476892 bytes', 23476892),
-      array('76MRandomStringThatShouldBeIgnoredByParseSize.', 79691776), // 76 MB
-      array('76.24 Giggabyte', 81862076662), // 76.24 GB (with typo)
-    );
+    return [
+      ['1', 1],
+      ['1 byte', 1],
+      ['1 KB'  , Bytes::KILOBYTE],
+      ['1 MB'  , pow(Bytes::KILOBYTE, 2)],
+      ['1 GB'  , pow(Bytes::KILOBYTE, 3)],
+      ['1 TB'  , pow(Bytes::KILOBYTE, 4)],
+      ['1 PB'  , pow(Bytes::KILOBYTE, 5)],
+      ['1 EB'  , pow(Bytes::KILOBYTE, 6)],
+      ['1 ZB'  , pow(Bytes::KILOBYTE, 7)],
+      ['1 YB'  , pow(Bytes::KILOBYTE, 8)],
+      ['23476892 bytes', 23476892],
+      ['76MRandomStringThatShouldBeIgnoredByParseSize.', 79691776], // 76 MB
+      ['76.24 Giggabyte', 81862076662], // 76.24 GB (with typo)
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Utility/ColorTest.php b/core/tests/Drupal/Tests/Component/Utility/ColorTest.php
index c65bf55a0974f9e7de0ff5b260fe2fa3231c6bc2..e2f1629198fcb54b9ca2010682e0b5b844ed2d9b 100644
--- a/core/tests/Drupal/Tests/Component/Utility/ColorTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/ColorTest.php
@@ -43,35 +43,35 @@ public function testHexToRgb($value, $expected, $invalid = FALSE) {
    *     - (optional) Boolean indicating invalid status. Defaults to FALSE.
    */
   public function providerTestHexToRgb() {
-    $invalid = array();
+    $invalid = [];
     // Any invalid arguments should throw an exception.
-    foreach (array('', '-1', '1', '12', '12345', '1234567', '123456789', '123456789a', 'foo') as $value) {
-      $invalid[] = array($value, '', TRUE);
+    foreach (['', '-1', '1', '12', '12345', '1234567', '123456789', '123456789a', 'foo'] as $value) {
+      $invalid[] = [$value, '', TRUE];
     }
     // Duplicate all invalid value tests with additional '#' prefix.
     // The '#' prefix inherently turns the data type into a string.
     foreach ($invalid as $value) {
-      $invalid[] = array('#' . $value[0], '', TRUE);
+      $invalid[] = ['#' . $value[0], '', TRUE];
     }
     // Add invalid data types (hex value must be a string).
-    foreach (array(
+    foreach ([
       1, 12, 1234, 12345, 123456, 1234567, 12345678, 123456789, 123456789,
       -1, PHP_INT_MAX, PHP_INT_MAX + 1, -PHP_INT_MAX, 0x0, 0x010
-    ) as $value) {
-      $invalid[] = array($value, '', TRUE);
+    ] as $value) {
+      $invalid[] = [$value, '', TRUE];
     }
     // And some valid values.
-    $valid = array(
+    $valid = [
       // Shorthands without alpha.
-      array('hex' => '#000', 'rgb' => array('red' => 0, 'green' => 0, 'blue' => 0)),
-      array('hex' => '#fff', 'rgb' => array('red' => 255, 'green' => 255, 'blue' => 255)),
-      array('hex' => '#abc', 'rgb' => array('red' => 170, 'green' => 187, 'blue' => 204)),
-      array('hex' => 'cba', 'rgb' => array('red' => 204, 'green' => 187, 'blue' => 170)),
+      ['hex' => '#000', 'rgb' => ['red' => 0, 'green' => 0, 'blue' => 0]],
+      ['hex' => '#fff', 'rgb' => ['red' => 255, 'green' => 255, 'blue' => 255]],
+      ['hex' => '#abc', 'rgb' => ['red' => 170, 'green' => 187, 'blue' => 204]],
+      ['hex' => 'cba', 'rgb' => ['red' => 204, 'green' => 187, 'blue' => 170]],
       // Full without alpha.
-      array('hex' => '#000000', 'rgb' => array('red' => 0, 'green' => 0, 'blue' => 0)),
-      array('hex' => '#ffffff', 'rgb' => array('red' => 255, 'green' => 255, 'blue' => 255)),
-      array('hex' => '#010203', 'rgb' => array('red' => 1, 'green' => 2, 'blue' => 3)),
-    );
+      ['hex' => '#000000', 'rgb' => ['red' => 0, 'green' => 0, 'blue' => 0]],
+      ['hex' => '#ffffff', 'rgb' => ['red' => 255, 'green' => 255, 'blue' => 255]],
+      ['hex' => '#010203', 'rgb' => ['red' => 1, 'green' => 2, 'blue' => 3]],
+    ];
     return array_merge($invalid, $valid);
   }
 
@@ -101,19 +101,19 @@ public function testRgbToHex($value, $expected) {
    */
   public function providerTestRbgToHex() {
     // Input using named RGB array (e.g., as returned by Color::hexToRgb()).
-    $tests = array(
-      array(array('red' => 0, 'green' => 0, 'blue' => 0), '#000000'),
-      array(array('red' => 255, 'green' => 255, 'blue' => 255), '#ffffff'),
-      array(array('red' => 119, 'green' => 119, 'blue' => 119), '#777777'),
-      array(array('red' => 1, 'green' => 2, 'blue' => 3), '#010203'),
-    );
+    $tests = [
+      [['red' => 0, 'green' => 0, 'blue' => 0], '#000000'],
+      [['red' => 255, 'green' => 255, 'blue' => 255], '#ffffff'],
+      [['red' => 119, 'green' => 119, 'blue' => 119], '#777777'],
+      [['red' => 1, 'green' => 2, 'blue' => 3], '#010203'],
+    ];
     // Input using indexed RGB array (e.g.: array(10, 10, 10)).
     foreach ($tests as $test) {
-      $tests[] = array(array_values($test[0]), $test[1]);
+      $tests[] = [array_values($test[0]), $test[1]];
     }
     // Input using CSS RGB string notation (e.g.: 10, 10, 10).
     foreach ($tests as $test) {
-      $tests[] = array(implode(', ', $test[0]), $test[1]);
+      $tests[] = [implode(', ', $test[0]), $test[1]];
     }
     return $tests;
   }
diff --git a/core/tests/Drupal/Tests/Component/Utility/CryptTest.php b/core/tests/Drupal/Tests/Component/Utility/CryptTest.php
index 42d6015158a4642870c92ffd15dd9a83abdfc3a1..f7091713d233016b2e015907322bc4bcdce05239 100644
--- a/core/tests/Drupal/Tests/Component/Utility/CryptTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/CryptTest.php
@@ -87,16 +87,16 @@ public function testHmacBase64Invalid($data, $key) {
    * @return array Test data.
    */
   public function providerTestHashBase64() {
-    return array(
-      array(
+    return [
+      [
         'data' => 'The SHA (Secure Hash Algorithm) is one of a number of cryptographic hash functions. A cryptographic hash is like a signature for a text or a data file. SHA-256 algorithm generates an almost-unique, fixed size 256-bit (32-byte) hash. Hash is a one way function – it cannot be decrypted back. This makes it suitable for password validation, challenge hash authentication, anti-tamper, digital signatures.',
         'expectedHash' => '034rT6smZAVRxpq8O98cFFNLIVx_Ph1EwLZQKcmRR_s',
-      ),
-      array(
+      ],
+      [
         'data' => 'SHA-256 is one of the successor hash functions to SHA-1, and is one of the strongest hash functions available.',
         'expected_hash' => 'yuqkDDYqprL71k4xIb6K6D7n76xldO4jseRhEkEE6SI',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -105,13 +105,13 @@ public function providerTestHashBase64() {
    * @return array Test data.
    */
   public function providerTestHmacBase64() {
-    return array(
-      array(
+    return [
+      [
         'data' => 'Calculates a base-64 encoded, URL-safe sha-256 hmac.',
         'key' => 'secret-key',
         'expected_hmac' => '2AaH63zwjhekWZlEpAiufyfhAHIzbQhl9Hd9oCi3_c8',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -120,33 +120,33 @@ public function providerTestHmacBase64() {
    * @return array Test data.
    */
   public function providerTestHmacBase64Invalid() {
-    return array(
-      array(new \stdClass(), new \stdClass()),
-      array(new \stdClass(), 'string'),
-      array(new \stdClass(), 1),
-      array(new \stdClass(), 0),
-      array(NULL, new \stdClass()),
-      array('string', new \stdClass()),
-      array(1, new \stdClass()),
-      array(0, new \stdClass()),
-      array(array(), array()),
-      array(array(), NULL),
-      array(array(), 'string'),
-      array(array(), 1),
-      array(array(), 0),
-      array(NULL, array()),
-      array(1, array()),
-      array(0, array()),
-      array('string', array()),
-      array(array(), NULL),
-      array(NULL, NULL),
-      array(NULL, 'string'),
-      array(NULL, 1),
-      array(NULL, 0),
-      array(1, NULL),
-      array(0, NULL),
-      array('string', NULL),
-    );
+    return [
+      [new \stdClass(), new \stdClass()],
+      [new \stdClass(), 'string'],
+      [new \stdClass(), 1],
+      [new \stdClass(), 0],
+      [NULL, new \stdClass()],
+      ['string', new \stdClass()],
+      [1, new \stdClass()],
+      [0, new \stdClass()],
+      [[], []],
+      [[], NULL],
+      [[], 'string'],
+      [[], 1],
+      [[], 0],
+      [NULL, []],
+      [1, []],
+      [0, []],
+      ['string', []],
+      [[], NULL],
+      [NULL, NULL],
+      [NULL, 'string'],
+      [NULL, 1],
+      [NULL, 0],
+      [1, NULL],
+      [0, NULL],
+      ['string', NULL],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php b/core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php
index b240e4e0da485f7ac4ce1621dc7a2bd86de61c55..708eee9ab1df5e10abde03ffe54cef575388c142 100644
--- a/core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php
@@ -47,16 +47,16 @@ public function providerTestCheckMemoryLimit() {
     $memory_limit = ini_get('memory_limit');
     $twice_avail_memory = ($memory_limit * 2) . 'MB';
 
-    return array(
+    return [
       // Minimal amount of memory should be available.
-      array('30MB', NULL, TRUE),
+      ['30MB', NULL, TRUE],
       // Exceed a custom (unlimited) memory limit.
-      array($twice_avail_memory, -1, TRUE),
+      [$twice_avail_memory, -1, TRUE],
       // Exceed a custom memory limit.
-      array('30MB', '16MB', FALSE),
+      ['30MB', '16MB', FALSE],
       // Available = required.
-      array('30MB', '30MB', TRUE),
-    );
+      ['30MB', '30MB', TRUE],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Utility/HtmlTest.php b/core/tests/Drupal/Tests/Component/Utility/HtmlTest.php
index 6a106c7b9e4a900dd2d39285949dd0ed30874ed0..8bab1c7f03ccdf6272a06fc4b64a2df21a1950d5 100644
--- a/core/tests/Drupal/Tests/Component/Utility/HtmlTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/HtmlTest.php
@@ -59,25 +59,25 @@ public function providerTestCleanCssIdentifier() {
     $id1 = 'abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMNOPQRSTUVWXYZ-0123456789';
     $id2 = '¡¢£¤¥';
     $id3 = 'css__identifier__with__double__underscores';
-    return array(
+    return [
       // Verify that no valid ASCII characters are stripped from the identifier.
-      array($id1, $id1, array()),
+      [$id1, $id1, []],
       // Verify that valid UTF-8 characters are not stripped from the identifier.
-      array($id2, $id2, array()),
+      [$id2, $id2, []],
       // Verify that invalid characters (including non-breaking space) are stripped from the identifier.
-      array($id3, $id3),
+      [$id3, $id3],
       // Verify that double underscores are not stripped from the identifier.
-      array('invalididentifier', 'invalid !"#$%&\'()*+,./:;<=>?@[\\]^`{|}~ identifier', array()),
+      ['invalididentifier', 'invalid !"#$%&\'()*+,./:;<=>?@[\\]^`{|}~ identifier', []],
       // Verify that an identifier starting with a digit is replaced.
-      array('_cssidentifier', '1cssidentifier', array()),
+      ['_cssidentifier', '1cssidentifier', []],
       // Verify that an identifier starting with a hyphen followed by a digit is
       // replaced.
-      array('__cssidentifier', '-1cssidentifier', array()),
+      ['__cssidentifier', '-1cssidentifier', []],
       // Verify that an identifier starting with two hyphens is replaced.
-      array('__cssidentifier', '--cssidentifier', array()),
+      ['__cssidentifier', '--cssidentifier', []],
       // Verify that passing double underscores as a filter is processed.
-      array('_cssidentifier', '__cssidentifier', array('__' => '_')),
-    );
+      ['_cssidentifier', '__cssidentifier', ['__' => '_']],
+    ];
   }
 
   /**
@@ -119,18 +119,18 @@ public function testHtmlGetUniqueId($expected, $source, $reset = FALSE) {
    */
   public function providerTestHtmlGetUniqueId() {
     $id = 'abcdefghijklmnopqrstuvwxyz-0123456789';
-    return array(
+    return [
       // Verify that letters, digits, and hyphens are not stripped from the ID.
-      array($id, $id),
+      [$id, $id],
       // Verify that invalid characters are stripped from the ID.
-      array('invalididentifier', 'invalid,./:@\\^`{Üidentifier'),
+      ['invalididentifier', 'invalid,./:@\\^`{Üidentifier'],
       // Verify Drupal coding standards are enforced.
-      array('id-name-1', 'ID NAME_[1]'),
+      ['id-name-1', 'ID NAME_[1]'],
       // Verify that a repeated ID is made unique.
-      array('test-unique-id', 'test-unique-id', TRUE),
-      array('test-unique-id--2', 'test-unique-id'),
-      array('test-unique-id--3', 'test-unique-id'),
-    );
+      ['test-unique-id', 'test-unique-id', TRUE],
+      ['test-unique-id--2', 'test-unique-id'],
+      ['test-unique-id--3', 'test-unique-id'],
+    ];
   }
 
   /**
@@ -168,13 +168,13 @@ public function testHtmlGetUniqueIdWithAjaxIds($expected, $source) {
    *   Test data.
    */
   public function providerTestHtmlGetUniqueIdWithAjaxIds() {
-    return array(
-      array('test-unique-id1--', 'test-unique-id1'),
+    return [
+      ['test-unique-id1--', 'test-unique-id1'],
       // Note, we truncate two hyphens at the end.
       // @see \Drupal\Component\Utility\Html::getId()
-      array('test-unique-id1---', 'test-unique-id1--'),
-      array('test-unique-id2--', 'test-unique-id2'),
-    );
+      ['test-unique-id1---', 'test-unique-id1--'],
+      ['test-unique-id2--', 'test-unique-id2'],
+    ];
   }
 
   /**
@@ -202,17 +202,17 @@ public function testHtmlGetId($expected, $source) {
    */
   public function providerTestHtmlGetId() {
     $id = 'abcdefghijklmnopqrstuvwxyz-0123456789';
-    return array(
+    return [
       // Verify that letters, digits, and hyphens are not stripped from the ID.
-      array($id, $id),
+      [$id, $id],
       // Verify that invalid characters are stripped from the ID.
-      array('invalididentifier', 'invalid,./:@\\^`{Üidentifier'),
+      ['invalididentifier', 'invalid,./:@\\^`{Üidentifier'],
       // Verify Drupal coding standards are enforced.
-      array('id-name-1', 'ID NAME_[1]'),
+      ['id-name-1', 'ID NAME_[1]'],
       // Verify that a repeated ID is made unique.
-      array('test-unique-id', 'test-unique-id'),
-      array('test-unique-id', 'test-unique-id'),
-    );
+      ['test-unique-id', 'test-unique-id'],
+      ['test-unique-id', 'test-unique-id'],
+    ];
   }
 
   /**
@@ -231,29 +231,29 @@ public function testDecodeEntities($text, $expected) {
    * @see testDecodeEntities()
    */
   public function providerDecodeEntities() {
-    return array(
-      array('Drupal', 'Drupal'),
-      array('<script>', '<script>'),
-      array('&lt;script&gt;', '<script>'),
-      array('&#60;script&#62;', '<script>'),
-      array('&amp;lt;script&amp;gt;', '&lt;script&gt;'),
-      array('"', '"'),
-      array('&#34;', '"'),
-      array('&amp;#34;', '&#34;'),
-      array('&quot;', '"'),
-      array('&amp;quot;', '&quot;'),
-      array("'", "'"),
-      array('&#39;', "'"),
-      array('&amp;#39;', '&#39;'),
-      array('©', '©'),
-      array('&copy;', '©'),
-      array('&#169;', '©'),
-      array('→', '→'),
-      array('&#8594;', '→'),
-      array('➼', '➼'),
-      array('&#10172;', '➼'),
-      array('&euro;', '€'),
-    );
+    return [
+      ['Drupal', 'Drupal'],
+      ['<script>', '<script>'],
+      ['&lt;script&gt;', '<script>'],
+      ['&#60;script&#62;', '<script>'],
+      ['&amp;lt;script&amp;gt;', '&lt;script&gt;'],
+      ['"', '"'],
+      ['&#34;', '"'],
+      ['&amp;#34;', '&#34;'],
+      ['&quot;', '"'],
+      ['&amp;quot;', '&quot;'],
+      ["'", "'"],
+      ['&#39;', "'"],
+      ['&amp;#39;', '&#39;'],
+      ['©', '©'],
+      ['&copy;', '©'],
+      ['&#169;', '©'],
+      ['→', '→'],
+      ['&#8594;', '→'],
+      ['➼', '➼'],
+      ['&#10172;', '➼'],
+      ['&euro;', '€'],
+    ];
   }
 
   /**
@@ -272,21 +272,21 @@ public function testEscape($expected, $text) {
    * @see testEscape()
    */
   public function providerEscape() {
-    return array(
-      array('Drupal', 'Drupal'),
-      array('&lt;script&gt;', '<script>'),
-      array('&amp;lt;script&amp;gt;', '&lt;script&gt;'),
-      array('&amp;#34;', '&#34;'),
-      array('&quot;', '"'),
-      array('&amp;quot;', '&quot;'),
-      array('&#039;', "'"),
-      array('&amp;#039;', '&#039;'),
-      array('©', '©'),
-      array('→', '→'),
-      array('➼', '➼'),
-      array('€', '€'),
-      array('Drup�al', "Drup\x80al"),
-    );
+    return [
+      ['Drupal', 'Drupal'],
+      ['&lt;script&gt;', '<script>'],
+      ['&amp;lt;script&amp;gt;', '&lt;script&gt;'],
+      ['&amp;#34;', '&#34;'],
+      ['&quot;', '"'],
+      ['&amp;quot;', '&quot;'],
+      ['&#039;', "'"],
+      ['&amp;#039;', '&#039;'],
+      ['©', '©'],
+      ['→', '→'],
+      ['➼', '➼'],
+      ['€', '€'],
+      ['Drup�al', "Drup\x80al"],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/Utility/ImageTest.php b/core/tests/Drupal/Tests/Component/Utility/ImageTest.php
index 7c3a5ac1295d18572952427cfea15ce21c4c067f..eec1375eaef764905cb745558731154478051d44 100644
--- a/core/tests/Drupal/Tests/Component/Utility/ImageTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/ImageTest.php
@@ -44,113 +44,113 @@ public function testScaleDimensions($input, $output) {
    */
   public function providerTestScaleDimensions() {
     // Define input / output datasets to test different branch conditions.
-    $tests = array();
+    $tests = [];
 
     // Test branch conditions:
     // - No height.
     // - Upscale, don't need to upscale.
-    $tests[] = array(
-      'input' => array(
-        'dimensions' => array(
+    $tests[] = [
+      'input' => [
+        'dimensions' => [
           'width' => 1000,
           'height' => 2000,
-        ),
+        ],
         'width' => 200,
         'height' => NULL,
         'upscale' => TRUE,
-      ),
-      'output' => array(
-        'dimensions' => array(
+      ],
+      'output' => [
+        'dimensions' => [
           'width' => 200,
           'height' => 400,
-        ),
+        ],
         'return_value' => TRUE,
-      ),
-    );
+      ],
+    ];
 
     // Test branch conditions:
     // - No width.
     // - Don't upscale, don't need to upscale.
-    $tests[] = array(
-      'input' => array(
-        'dimensions' => array(
+    $tests[] = [
+      'input' => [
+        'dimensions' => [
           'width' => 1000,
           'height' => 800,
-        ),
+        ],
         'width' => NULL,
         'height' => 140,
         'upscale' => FALSE,
-      ),
-      'output' => array(
-        'dimensions' => array(
+      ],
+      'output' => [
+        'dimensions' => [
           'width' => 175,
           'height' => 140,
-        ),
+        ],
         'return_value' => TRUE,
-      ),
-    );
+      ],
+    ];
 
     // Test branch conditions:
     // - Source aspect ratio greater than target.
     // - Upscale, need to upscale.
-    $tests[] = array(
-      'input' => array(
-        'dimensions' => array(
+    $tests[] = [
+      'input' => [
+        'dimensions' => [
           'width' => 8,
           'height' => 20,
-        ),
+        ],
         'width' => 200,
         'height' => 140,
         'upscale' => TRUE,
-      ),
-      'output' => array(
-        'dimensions' => array(
+      ],
+      'output' => [
+        'dimensions' => [
           'width' => 56,
           'height' => 140,
-        ),
+        ],
         'return_value' => TRUE,
-      ),
-    );
+      ],
+    ];
 
     // Test branch condition: target aspect ratio greater than source.
-    $tests[] = array(
-      'input' => array(
-        'dimensions' => array(
+    $tests[] = [
+      'input' => [
+        'dimensions' => [
           'width' => 2000,
           'height' => 800,
-        ),
+        ],
         'width' => 200,
         'height' => 140,
         'upscale' => FALSE,
-      ),
-      'output' => array(
-        'dimensions' => array(
+      ],
+      'output' => [
+        'dimensions' => [
           'width' => 200,
           'height' => 80,
-        ),
+        ],
         'return_value' => TRUE,
-      ),
-    );
+      ],
+    ];
 
     // Test branch condition: don't upscale, need to upscale.
-    $tests[] = array(
-      'input' => array(
-        'dimensions' => array(
+    $tests[] = [
+      'input' => [
+        'dimensions' => [
           'width' => 100,
           'height' => 50,
-        ),
+        ],
         'width' => 200,
         'height' => 140,
         'upscale' => FALSE,
-      ),
-      'output' => array(
-        'dimensions' => array(
+      ],
+      'output' => [
+        'dimensions' => [
           'width' => 100,
           'height' => 50,
-        ),
+        ],
         'return_value' => FALSE,
-      ),
-    );
+      ],
+    ];
 
     return $tests;
   }
diff --git a/core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php b/core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php
index 92db2ac8ac698a2d6a410e60689d48ba1d679464..0371ebb3503d0d261e808c75baceec9759ad1a9c 100644
--- a/core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php
@@ -32,12 +32,12 @@ protected function setUp() {
     parent::setUp();
 
     // Create a form structure with a nested element.
-    $this->form['details']['element'] = array(
+    $this->form['details']['element'] = [
      '#value' => 'Nested element',
-    );
+    ];
 
     // Set up parent array.
-    $this->parents = array('details', 'element');
+    $this->parents = ['details', 'element'];
   }
 
   /**
@@ -76,10 +76,10 @@ public function testGetValue() {
    * @covers ::setValue
    */
   public function testSetValue() {
-    $new_value = array(
+    $new_value = [
       '#value' => 'New value',
       '#required' => TRUE,
-    );
+    ];
 
     // Verify setting the value of a nested element.
     NestedArray::setValue($this->form, $this->parents, $new_value);
@@ -93,11 +93,11 @@ public function testSetValue() {
    * @covers ::setValue
    */
   public function testSetValueForce() {
-    $new_value = array(
+    $new_value = [
       'one',
-    );
+    ];
     $this->form['details']['non-array-parent'] = 'string';
-    $parents = array('details', 'non-array-parent', 'child');
+    $parents = ['details', 'non-array-parent', 'child'];
     NestedArray::setValue($this->form, $parents, $new_value, TRUE);
     $this->assertSame($new_value, $this->form['details']['non-array-parent']['child'], 'The nested element was not forced to the new value.');
   }
@@ -144,23 +144,23 @@ public function testKeyExists() {
    * @covers ::mergeDeepArray
    */
   public function testMergeDeepArray() {
-    $link_options_1 = array(
+    $link_options_1 = [
       'fragment' => 'x',
-      'attributes' => array('title' => 'X', 'class' => array('a', 'b')),
+      'attributes' => ['title' => 'X', 'class' => ['a', 'b']],
       'language' => 'en',
-    );
-    $link_options_2 = array(
+    ];
+    $link_options_2 = [
       'fragment' => 'y',
-      'attributes' => array('title' => 'Y', 'class' => array('c', 'd')),
+      'attributes' => ['title' => 'Y', 'class' => ['c', 'd']],
       'absolute' => TRUE,
-    );
-    $expected = array(
+    ];
+    $expected = [
       'fragment' => 'y',
-      'attributes' => array('title' => 'Y', 'class' => array('a', 'b', 'c', 'd')),
+      'attributes' => ['title' => 'Y', 'class' => ['a', 'b', 'c', 'd']],
       'language' => 'en',
       'absolute' => TRUE,
-    );
-    $this->assertSame($expected, NestedArray::mergeDeepArray(array($link_options_1, $link_options_2)), 'NestedArray::mergeDeepArray() returned a properly merged array.');
+    ];
+    $this->assertSame($expected, NestedArray::mergeDeepArray([$link_options_1, $link_options_2]), 'NestedArray::mergeDeepArray() returned a properly merged array.');
     // Test wrapper function, NestedArray::mergeDeep().
     $this->assertSame($expected, NestedArray::mergeDeep($link_options_1, $link_options_2), 'NestedArray::mergeDeep() returned a properly merged array.');
   }
@@ -171,18 +171,18 @@ public function testMergeDeepArray() {
    * @covers ::mergeDeepArray
    */
   public function testMergeImplicitKeys() {
-    $a = array(
-      'subkey' => array('X', 'Y'),
-    );
-    $b = array(
-      'subkey' => array('X'),
-    );
+    $a = [
+      'subkey' => ['X', 'Y'],
+    ];
+    $b = [
+      'subkey' => ['X'],
+    ];
 
     // Drupal core behavior.
-    $expected = array(
-      'subkey' => array('X', 'Y', 'X'),
-    );
-    $actual = NestedArray::mergeDeepArray(array($a, $b));
+    $expected = [
+      'subkey' => ['X', 'Y', 'X'],
+    ];
+    $actual = NestedArray::mergeDeepArray([$a, $b]);
     $this->assertSame($expected, $actual, 'drupal_array_merge_deep() creates new numeric keys in the implicit sequence.');
   }
 
@@ -192,29 +192,29 @@ public function testMergeImplicitKeys() {
    * @covers ::mergeDeepArray
    */
   public function testMergeExplicitKeys() {
-    $a = array(
-      'subkey' => array(
+    $a = [
+      'subkey' => [
         0 => 'A',
         1 => 'B',
-      ),
-    );
-    $b = array(
-      'subkey' => array(
+      ],
+    ];
+    $b = [
+      'subkey' => [
         0 => 'C',
         1 => 'D',
-      ),
-    );
+      ],
+    ];
 
     // Drupal core behavior.
-    $expected = array(
-      'subkey' => array(
+    $expected = [
+      'subkey' => [
         0 => 'A',
         1 => 'B',
         2 => 'C',
         3 => 'D',
-      ),
-    );
-    $actual = NestedArray::mergeDeepArray(array($a, $b));
+      ],
+    ];
+    $actual = NestedArray::mergeDeepArray([$a, $b]);
     $this->assertSame($expected, $actual, 'drupal_array_merge_deep() creates new numeric keys in the explicit sequence.');
   }
 
@@ -228,29 +228,29 @@ public function testMergeExplicitKeys() {
    * @covers ::mergeDeepArray
    */
   public function testMergeOutOfSequenceKeys() {
-    $a = array(
-      'subkey' => array(
+    $a = [
+      'subkey' => [
         10 => 'A',
         30 => 'B',
-      ),
-    );
-    $b = array(
-      'subkey' => array(
+      ],
+    ];
+    $b = [
+      'subkey' => [
         20 => 'C',
         0 => 'D',
-      ),
-    );
+      ],
+    ];
 
     // Drupal core behavior.
-    $expected = array(
-      'subkey' => array(
+    $expected = [
+      'subkey' => [
         0 => 'A',
         1 => 'B',
         2 => 'C',
         3 => 'D',
-      ),
-    );
-    $actual = NestedArray::mergeDeepArray(array($a, $b));
+      ],
+    ];
+    $actual = NestedArray::mergeDeepArray([$a, $b]);
     $this->assertSame($expected, $actual, 'drupal_array_merge_deep() ignores numeric key order when merging.');
   }
 
diff --git a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
index 3e326296600df2e84dca06b63d87c9d7ae49150b..8d415de92b393169f817d586abb13cb3b77d4a9b 100644
--- a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
@@ -60,36 +60,36 @@ public function testValidStepOffset($value, $step, $offset, $expected) {
    * @see \Drupal\Tests\Component\Utility\Number::testValidStep
    */
   public static function providerTestValidStep() {
-    return array(
+    return [
       // Value and step equal.
-      array(10.3, 10.3, TRUE),
+      [10.3, 10.3, TRUE],
 
       // Valid integer steps.
-      array(42, 21, TRUE),
-      array(42, 3, TRUE),
+      [42, 21, TRUE],
+      [42, 3, TRUE],
 
       // Valid float steps.
-      array(42, 10.5, TRUE),
-      array(1, 1 / 3, TRUE),
-      array(-100, 100 / 7, TRUE),
-      array(1000, -10, TRUE),
+      [42, 10.5, TRUE],
+      [1, 1 / 3, TRUE],
+      [-100, 100 / 7, TRUE],
+      [1000, -10, TRUE],
 
       // Valid and very small float steps.
-      array(1000.12345, 1e-10, TRUE),
-      array(3.9999999999999, 1e-13, TRUE),
+      [1000.12345, 1e-10, TRUE],
+      [3.9999999999999, 1e-13, TRUE],
 
       // Invalid integer steps.
-      array(100, 30, FALSE),
-      array(-10, 4, FALSE),
+      [100, 30, FALSE],
+      [-10, 4, FALSE],
 
       // Invalid float steps.
-      array(6, 5 / 7, FALSE),
-      array(10.3, 10.25, FALSE),
+      [6, 5 / 7, FALSE],
+      [10.3, 10.25, FALSE],
 
       // Step mismatches very close to being valid.
-      array(70 + 9e-7, 10 + 9e-7, FALSE),
-      array(1936.5, 3e-8, FALSE),
-    );
+      [70 + 9e-7, 10 + 9e-7, FALSE],
+      [1936.5, 3e-8, FALSE],
+    ];
   }
 
   /**
@@ -98,22 +98,22 @@ public static function providerTestValidStep() {
    * @see \Drupal\Test\Component\Utility\NumberTest::testValidStepOffset()
    */
   public static function providerTestValidStepOffset() {
-    return array(
+    return [
       // Try obvious fits.
-      array(11.3, 10.3, 1, TRUE),
-      array(100, 10, 50, TRUE),
-      array(-100, 90 / 7, -10, TRUE),
-      array(2 / 7 + 5 / 9, 1 / 7, 5 / 9, TRUE),
+      [11.3, 10.3, 1, TRUE],
+      [100, 10, 50, TRUE],
+      [-100, 90 / 7, -10, TRUE],
+      [2 / 7 + 5 / 9, 1 / 7, 5 / 9, TRUE],
 
       // Ensure a small offset is still invalid.
-      array(10.3, 10.3, 0.0001, FALSE),
-      array(1 / 5, 1 / 7, 1 / 11, FALSE),
+      [10.3, 10.3, 0.0001, FALSE],
+      [1 / 5, 1 / 7, 1 / 11, FALSE],
 
       // Try negative values and offsets.
-      array(1000, 10, -5, FALSE),
-      array(-10, 4, 0, FALSE),
-      array(-10, 4, -4, FALSE),
-    );
+      [1000, 10, -5, FALSE],
+      [-10, 4, 0, FALSE],
+      [-10, 4, -4, FALSE],
+    ];
   }
 
   /**
@@ -144,15 +144,15 @@ public function testConversions($value, $expected) {
    *     - The alphadecimal value.
    */
   public function providerTestConversions() {
-    return array(
-      array(0, '00'),
-      array(1, '01'),
-      array(10, '0a'),
-      array(20, '0k'),
-      array(35, '0z'),
-      array(36, '110'),
-      array(100, '12s'),
-    );
+    return [
+      [0, '00'],
+      [1, '01'],
+      [10, '0a'],
+      [20, '0k'],
+      [35, '0z'],
+      [36, '110'],
+      [100, '12s'],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Utility/RandomTest.php b/core/tests/Drupal/Tests/Component/Utility/RandomTest.php
index b67758526895edef5b66882e92dae1eea9bed2c5..e8cc6f663e415a35289ab9cdda6245fab1af6f42 100644
--- a/core/tests/Drupal/Tests/Component/Utility/RandomTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/RandomTest.php
@@ -29,7 +29,7 @@ class RandomTest extends UnitTestCase {
    * @covers ::string
    */
   public function testRandomStringUniqueness() {
-    $strings = array();
+    $strings = [];
     $random = new Random();
     for ($i = 0; $i <= 50; $i++) {
       $str = $random->string(1, TRUE);
@@ -44,7 +44,7 @@ public function testRandomStringUniqueness() {
    * @covers ::name
    */
   public function testRandomNamesUniqueness() {
-    $names = array();
+    $names = [];
     $random = new Random();
     for ($i = 0; $i <= 10; $i++) {
       $str = $random->name(1, TRUE);
@@ -138,7 +138,7 @@ public function testRandomObject() {
   public function testRandomStringValidator() {
     $random = new Random();
     $this->firstStringGenerated = '';
-    $str = $random->string(1, TRUE, array($this, '_RandomStringValidate'));
+    $str = $random->string(1, TRUE, [$this, '_RandomStringValidate']);
     $this->assertNotEquals($this->firstStringGenerated, $str);
   }
 
diff --git a/core/tests/Drupal/Tests/Component/Utility/SafeMarkupTest.php b/core/tests/Drupal/Tests/Component/Utility/SafeMarkupTest.php
index 8c1fdcec13a35c818d72acdb47a793da31b38159..7495fa5f0153f36a8baa51299f0a085d93317c49 100644
--- a/core/tests/Drupal/Tests/Component/Utility/SafeMarkupTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/SafeMarkupTest.php
@@ -89,15 +89,15 @@ function testHtmlEscapedText($text, $expected, $message) {
    */
   function providerCheckPlain() {
     // Checks that invalid multi-byte sequences are escaped.
-    $tests[] = array("Foo\xC0barbaz", 'Foo�barbaz', 'Escapes invalid sequence "Foo\xC0barbaz"');
-    $tests[] = array("\xc2\"", '�&quot;', 'Escapes invalid sequence "\xc2\""');
-    $tests[] = array("Fooÿñ", "Fooÿñ", 'Does not escape valid sequence "Fooÿñ"');
+    $tests[] = ["Foo\xC0barbaz", 'Foo�barbaz', 'Escapes invalid sequence "Foo\xC0barbaz"'];
+    $tests[] = ["\xc2\"", '�&quot;', 'Escapes invalid sequence "\xc2\""'];
+    $tests[] = ["Fooÿñ", "Fooÿñ", 'Does not escape valid sequence "Fooÿñ"'];
 
     // Checks that special characters are escaped.
-    $tests[] = array(SafeMarkupTestMarkup::create("<script>"), '&lt;script&gt;', 'Escapes &lt;script&gt; even inside an object that implements MarkupInterface.');
-    $tests[] = array("<script>", '&lt;script&gt;', 'Escapes &lt;script&gt;');
-    $tests[] = array('<>&"\'', '&lt;&gt;&amp;&quot;&#039;', 'Escapes reserved HTML characters.');
-    $tests[] = array(SafeMarkupTestMarkup::create('<>&"\''), '&lt;&gt;&amp;&quot;&#039;', 'Escapes reserved HTML characters even inside an object that implements MarkupInterface.');
+    $tests[] = [SafeMarkupTestMarkup::create("<script>"), '&lt;script&gt;', 'Escapes &lt;script&gt; even inside an object that implements MarkupInterface.'];
+    $tests[] = ["<script>", '&lt;script&gt;', 'Escapes &lt;script&gt;'];
+    $tests[] = ['<>&"\'', '&lt;&gt;&amp;&quot;&#039;', 'Escapes reserved HTML characters.'];
+    $tests[] = [SafeMarkupTestMarkup::create('<>&"\''), '&lt;&gt;&amp;&quot;&#039;', 'Escapes reserved HTML characters even inside an object that implements MarkupInterface.'];
 
     return $tests;
   }
@@ -137,11 +137,11 @@ public function testFormat($string, array $args, $expected, $message, $expected_
    * @see testFormat()
    */
   function providerFormat() {
-    $tests[] = array('Simple text', array(), 'Simple text', 'SafeMarkup::format leaves simple text alone.', TRUE);
-    $tests[] = array('Escaped text: @value', array('@value' => '<script>'), 'Escaped text: &lt;script&gt;', 'SafeMarkup::format replaces and escapes string.', TRUE);
-    $tests[] = array('Escaped text: @value', array('@value' => SafeMarkupTestMarkup::create('<span>Safe HTML</span>')), 'Escaped text: <span>Safe HTML</span>', 'SafeMarkup::format does not escape an already safe string.', TRUE);
-    $tests[] = array('Placeholder text: %value', array('%value' => '<script>'), 'Placeholder text: <em class="placeholder">&lt;script&gt;</em>', 'SafeMarkup::format replaces, escapes and themes string.', TRUE);
-    $tests[] = array('Placeholder text: %value', array('%value' => SafeMarkupTestMarkup::create('<span>Safe HTML</span>')), 'Placeholder text: <em class="placeholder"><span>Safe HTML</span></em>', 'SafeMarkup::format does not escape an already safe string themed as a placeholder.', TRUE);
+    $tests[] = ['Simple text', [], 'Simple text', 'SafeMarkup::format leaves simple text alone.', TRUE];
+    $tests[] = ['Escaped text: @value', ['@value' => '<script>'], 'Escaped text: &lt;script&gt;', 'SafeMarkup::format replaces and escapes string.', TRUE];
+    $tests[] = ['Escaped text: @value', ['@value' => SafeMarkupTestMarkup::create('<span>Safe HTML</span>')], 'Escaped text: <span>Safe HTML</span>', 'SafeMarkup::format does not escape an already safe string.', TRUE];
+    $tests[] = ['Placeholder text: %value', ['%value' => '<script>'], 'Placeholder text: <em class="placeholder">&lt;script&gt;</em>', 'SafeMarkup::format replaces, escapes and themes string.', TRUE];
+    $tests[] = ['Placeholder text: %value', ['%value' => SafeMarkupTestMarkup::create('<span>Safe HTML</span>')], 'Placeholder text: <em class="placeholder"><span>Safe HTML</span></em>', 'SafeMarkup::format does not escape an already safe string themed as a placeholder.', TRUE];
 
     $tests['javascript-protocol-url'] = ['Simple text <a href=":url">giraffe</a>', [':url' => 'javascript://example.com?foo&bar'], 'Simple text <a href="//example.com?foo&amp;bar">giraffe</a>', 'Support for filtering bad protocols', TRUE];
     $tests['external-url'] = ['Simple text <a href=":url">giraffe</a>', [':url' => 'http://example.com?foo&bar'], 'Simple text <a href="http://example.com?foo&amp;bar">giraffe</a>', 'Support for filtering bad protocols', TRUE];
diff --git a/core/tests/Drupal/Tests/Component/Utility/SortArrayTest.php b/core/tests/Drupal/Tests/Component/Utility/SortArrayTest.php
index 3ff7ed1cf402ea809bca3468ae5ab096c77d9318..890d17171ebca424b6c410e44d85d6d479840ea0 100644
--- a/core/tests/Drupal/Tests/Component/Utility/SortArrayTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/SortArrayTest.php
@@ -43,49 +43,49 @@ public function testSortByWeightElement($a, $b, $expected) {
    * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByWeightElement()
    */
   public function providerSortByWeightElement() {
-    $tests = array();
+    $tests = [];
 
     // Weights set and equal.
-    $tests[] = array(
-      array('weight' => 1),
-      array('weight' => 1),
+    $tests[] = [
+      ['weight' => 1],
+      ['weight' => 1],
       0
-    );
+    ];
 
     // Weights set and $a is less (lighter) than $b.
-    $tests[] = array(
-      array('weight' => 1),
-      array('weight' => 2),
+    $tests[] = [
+      ['weight' => 1],
+      ['weight' => 2],
       -1
-    );
+    ];
 
     // Weights set and $a is greater (heavier) than $b.
-    $tests[] = array(
-      array('weight' => 2),
-      array('weight' => 1),
+    $tests[] = [
+      ['weight' => 2],
+      ['weight' => 1],
       1
-    );
+    ];
 
     // Weights not set.
-    $tests[] = array(
-      array(),
-      array(),
+    $tests[] = [
+      [],
+      [],
       0
-    );
+    ];
 
     // Weights for $b not set.
-    $tests[] = array(
-      array('weight' => 1),
-      array(),
+    $tests[] = [
+      ['weight' => 1],
+      [],
       1
-    );
+    ];
 
     // Weights for $a not set.
-    $tests[] = array(
-      array(),
-      array('weight' => 1),
+    $tests[] = [
+      [],
+      ['weight' => 1],
       -1
-    );
+    ];
 
     return $tests;
   }
@@ -119,49 +119,49 @@ public function testSortByWeightProperty($a, $b, $expected) {
    * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByWeightProperty()
    */
   public function providerSortByWeightProperty() {
-    $tests = array();
+    $tests = [];
 
     // Weights set and equal.
-    $tests[] = array(
-      array('#weight' => 1),
-      array('#weight' => 1),
+    $tests[] = [
+      ['#weight' => 1],
+      ['#weight' => 1],
       0
-    );
+    ];
 
     // Weights set and $a is less (lighter) than $b.
-    $tests[] = array(
-      array('#weight' => 1),
-      array('#weight' => 2),
+    $tests[] = [
+      ['#weight' => 1],
+      ['#weight' => 2],
       -1
-    );
+    ];
 
     // Weights set and $a is greater (heavier) than $b.
-    $tests[] = array(
-      array('#weight' => 2),
-      array('#weight' => 1),
+    $tests[] = [
+      ['#weight' => 2],
+      ['#weight' => 1],
       1
-    );
+    ];
 
     // Weights not set.
-    $tests[] = array(
-      array(),
-      array(),
+    $tests[] = [
+      [],
+      [],
       0
-    );
+    ];
 
     // Weights for $b not set.
-    $tests[] = array(
-      array('#weight' => 1),
-      array(),
+    $tests[] = [
+      ['#weight' => 1],
+      [],
       1
-    );
+    ];
 
     // Weights for $a not set.
-    $tests[] = array(
-      array(),
-      array('#weight' => 1),
+    $tests[] = [
+      [],
+      ['#weight' => 1],
       -1
-    );
+    ];
 
     return $tests;
   }
@@ -195,42 +195,42 @@ public function testSortByTitleElement($a, $b, $expected) {
    * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByTitleElement()
    */
   public function providerSortByTitleElement() {
-    $tests = array();
+    $tests = [];
 
     // Titles set and equal.
-    $tests[] = array(
-      array('title' => 'test'),
-      array('title' => 'test'),
+    $tests[] = [
+      ['title' => 'test'],
+      ['title' => 'test'],
       0
-    );
+    ];
 
     // Title $a not set.
-    $tests[] = array(
-      array(),
-      array('title' => 'test'),
+    $tests[] = [
+      [],
+      ['title' => 'test'],
       -4
-    );
+    ];
 
     // Title $b not set.
-    $tests[] = array(
-      array('title' => 'test'),
-      array(),
+    $tests[] = [
+      ['title' => 'test'],
+      [],
       4
-    );
+    ];
 
     // Titles set but not equal.
-    $tests[] = array(
-      array('title' => 'test'),
-      array('title' => 'testing'),
+    $tests[] = [
+      ['title' => 'test'],
+      ['title' => 'testing'],
       -1
-    );
+    ];
 
     // Titles set but not equal.
-    $tests[] = array(
-      array('title' => 'testing'),
-      array('title' => 'test'),
+    $tests[] = [
+      ['title' => 'testing'],
+      ['title' => 'test'],
       1
-    );
+    ];
 
     return $tests;
   }
@@ -264,42 +264,42 @@ public function testSortByTitleProperty($a, $b, $expected) {
    * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByTitleProperty()
    */
   public function providerSortByTitleProperty() {
-    $tests = array();
+    $tests = [];
 
     // Titles set and equal.
-    $tests[] = array(
-      array('#title' => 'test'),
-      array('#title' => 'test'),
+    $tests[] = [
+      ['#title' => 'test'],
+      ['#title' => 'test'],
       0
-    );
+    ];
 
     // Title $a not set.
-    $tests[] = array(
-      array(),
-      array('#title' => 'test'),
+    $tests[] = [
+      [],
+      ['#title' => 'test'],
       -4
-    );
+    ];
 
     // Title $b not set.
-    $tests[] = array(
-      array('#title' => 'test'),
-      array(),
+    $tests[] = [
+      ['#title' => 'test'],
+      [],
       4
-    );
+    ];
 
     // Titles set but not equal.
-    $tests[] = array(
-      array('#title' => 'test'),
-      array('#title' => 'testing'),
+    $tests[] = [
+      ['#title' => 'test'],
+      ['#title' => 'testing'],
       -1
-    );
+    ];
 
     // Titles set but not equal.
-    $tests[] = array(
-      array('#title' => 'testing'),
-      array('#title' => 'test'),
+    $tests[] = [
+      ['#title' => 'testing'],
+      ['#title' => 'test'],
       1
-    );
+    ];
 
     return $tests;
   }
diff --git a/core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php b/core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php
index 39759b51cd5e6eb132df5dbdf7960114986bb5d1..b834d2bbed386076e16eb32a0ac3536963321b56 100644
--- a/core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php
@@ -51,15 +51,15 @@ public function testStatus($value, $expected, $invalid = FALSE) {
    *     - (optional) Boolean indicating invalid status. Defaults to FALSE.
    */
   public function providerTestStatus() {
-    return array(
-      array(Unicode::STATUS_SINGLEBYTE, Unicode::STATUS_SINGLEBYTE),
-      array(rand(10, 100), Unicode::STATUS_SINGLEBYTE, TRUE),
-      array(rand(10, 100), Unicode::STATUS_SINGLEBYTE, TRUE),
-      array(Unicode::STATUS_MULTIBYTE, Unicode::STATUS_MULTIBYTE),
-      array(rand(10, 100), Unicode::STATUS_MULTIBYTE, TRUE),
-      array(Unicode::STATUS_ERROR, Unicode::STATUS_ERROR),
-      array(Unicode::STATUS_MULTIBYTE, Unicode::STATUS_MULTIBYTE),
-    );
+    return [
+      [Unicode::STATUS_SINGLEBYTE, Unicode::STATUS_SINGLEBYTE],
+      [rand(10, 100), Unicode::STATUS_SINGLEBYTE, TRUE],
+      [rand(10, 100), Unicode::STATUS_SINGLEBYTE, TRUE],
+      [Unicode::STATUS_MULTIBYTE, Unicode::STATUS_MULTIBYTE],
+      [rand(10, 100), Unicode::STATUS_MULTIBYTE, TRUE],
+      [Unicode::STATUS_ERROR, Unicode::STATUS_ERROR],
+      [Unicode::STATUS_MULTIBYTE, Unicode::STATUS_MULTIBYTE],
+    ];
   }
 
   /**
@@ -83,11 +83,11 @@ public function testMimeHeader($value, $encoded) {
    *   An array containing a string and its encoded value.
    */
   public function providerTestMimeHeader() {
-    return array(
-      array('tést.txt', '=?UTF-8?B?dMOpc3QudHh0?='),
+    return [
+      ['tést.txt', '=?UTF-8?B?dMOpc3QudHh0?='],
       // Simple ASCII characters.
-      array('ASCII', 'ASCII'),
-    );
+      ['ASCII', 'ASCII'],
+    ];
   }
 
   /**
@@ -113,17 +113,17 @@ public function testStrtolower($text, $expected, $multibyte = FALSE) {
    *   be processed as multibyte.
    */
   public function providerStrtolower() {
-    $cases = array(
-      array('tHe QUIcK bRoWn', 'the quick brown'),
-      array('FrançAIS is ÜBER-åwesome', 'français is über-åwesome'),
-    );
+    $cases = [
+      ['tHe QUIcK bRoWn', 'the quick brown'],
+      ['FrançAIS is ÜBER-åwesome', 'français is über-åwesome'],
+    ];
     foreach ($cases as $case) {
       // Test the same string both in multibyte and singlebyte conditions.
       array_push($case, TRUE);
       $cases[] = $case;
     }
     // Add a multibyte string.
-    $cases[] = array('ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ', 'αβγδεζηθικλμνξοσὠ', TRUE);
+    $cases[] = ['ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ', 'αβγδεζηθικλμνξοσὠ', TRUE];
     return $cases;
   }
 
@@ -150,17 +150,17 @@ public function testStrtoupper($text, $expected, $multibyte = FALSE) {
    *   be processed as multibyte.
    */
   public function providerStrtoupper() {
-    $cases = array(
-      array('tHe QUIcK bRoWn', 'THE QUICK BROWN'),
-      array('FrançAIS is ÜBER-åwesome', 'FRANÇAIS IS ÜBER-ÅWESOME'),
-    );
+    $cases = [
+      ['tHe QUIcK bRoWn', 'THE QUICK BROWN'],
+      ['FrançAIS is ÜBER-åwesome', 'FRANÇAIS IS ÜBER-ÅWESOME'],
+    ];
     foreach ($cases as $case) {
       // Test the same string both in multibyte and singlebyte conditions.
       array_push($case, TRUE);
       $cases[] = $case;
     }
     // Add a multibyte string.
-    $cases[] = array('αβγδεζηθικλμνξοσὠ', 'ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ', TRUE);
+    $cases[] = ['αβγδεζηθικλμνξοσὠ', 'ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ', TRUE];
     return $cases;
   }
 
@@ -183,14 +183,14 @@ public function testUcfirst($text, $expected) {
    *   An array containing a string and its uppercase first version.
    */
   public function providerUcfirst() {
-    return array(
-      array('tHe QUIcK bRoWn', 'THe QUIcK bRoWn'),
-      array('françAIS', 'FrançAIS'),
-      array('über', 'Über'),
-      array('åwesome', 'Åwesome'),
+    return [
+      ['tHe QUIcK bRoWn', 'THe QUIcK bRoWn'],
+      ['françAIS', 'FrançAIS'],
+      ['über', 'Über'],
+      ['åwesome', 'Åwesome'],
       // A multibyte string.
-      array('σion', 'Σion'),
-    );
+      ['σion', 'Σion'],
+    ];
   }
 
   /**
@@ -215,14 +215,14 @@ public function testLcfirst($text, $expected, $multibyte = FALSE) {
    *   be processed as multibyte.
    */
   public function providerLcfirst() {
-    return array(
-      array('tHe QUIcK bRoWn', 'tHe QUIcK bRoWn'),
-      array('FrançAIS is ÜBER-åwesome', 'françAIS is ÜBER-åwesome'),
-      array('Über', 'über'),
-      array('Åwesome', 'åwesome'),
+    return [
+      ['tHe QUIcK bRoWn', 'tHe QUIcK bRoWn'],
+      ['FrançAIS is ÜBER-åwesome', 'françAIS is ÜBER-åwesome'],
+      ['Über', 'über'],
+      ['Åwesome', 'åwesome'],
       // Add a multibyte string.
-      array('ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ', 'αΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ', TRUE),
-    );
+      ['ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ', 'αΒΓΔΕΖΗΘΙΚΛΜΝΞΟΣὨ', TRUE],
+    ];
   }
 
   /**
@@ -247,16 +247,16 @@ public function testUcwords($text, $expected, $multibyte = FALSE) {
    *   be processed as multibyte.
    */
   public function providerUcwords() {
-    return array(
-      array('tHe QUIcK bRoWn', 'THe QUIcK BRoWn'),
-      array('françAIS', 'FrançAIS'),
-      array('über', 'Über'),
-      array('åwesome', 'Åwesome'),
+    return [
+      ['tHe QUIcK bRoWn', 'THe QUIcK BRoWn'],
+      ['françAIS', 'FrançAIS'],
+      ['über', 'Über'],
+      ['åwesome', 'Åwesome'],
       // Make sure we don't mangle extra spaces.
-      array('frànçAIS is  über-åwesome', 'FrànçAIS Is  Über-Åwesome'),
+      ['frànçAIS is  über-åwesome', 'FrànçAIS Is  Über-Åwesome'],
       // Add a multibyte string.
-      array('σion', 'Σion', TRUE),
-    );
+      ['σion', 'Σion', TRUE],
+    ];
   }
 
   /**
@@ -283,11 +283,11 @@ public function testStrlen($text, $expected) {
    *   An array containing a string and its length.
    */
   public function providerStrlen() {
-    return array(
-      array('tHe QUIcK bRoWn', 15),
-      array('ÜBER-åwesome', 12),
-      array('以呂波耳・ほへとち。リヌルヲ。', 15),
-    );
+    return [
+      ['tHe QUIcK bRoWn', 15],
+      ['ÜBER-åwesome', 12],
+      ['以呂波耳・ほへとち。リヌルヲ。', 15],
+    ];
   }
 
   /**
@@ -318,33 +318,33 @@ public function testSubstr($text, $start, $length, $expected) {
    *     - The expected string result.
    */
   public function providerSubstr() {
-    return array(
-      array('frànçAIS is über-åwesome', 0, NULL, 'frànçAIS is über-åwesome'),
-      array('frànçAIS is über-åwesome', 0, 0, ''),
-      array('frànçAIS is über-åwesome', 0, 1, 'f'),
-      array('frànçAIS is über-åwesome', 0, 8, 'frànçAIS'),
-      array('frànçAIS is über-åwesome', 0, 23, 'frànçAIS is über-åwesom'),
-      array('frànçAIS is über-åwesome', 0, 24, 'frànçAIS is über-åwesome'),
-      array('frànçAIS is über-åwesome', 0, 25, 'frànçAIS is über-åwesome'),
-      array('frànçAIS is über-åwesome', 0, 100, 'frànçAIS is über-åwesome'),
-      array('frànçAIS is über-åwesome', 4, 4, 'çAIS'),
-      array('frànçAIS is über-åwesome', 1, 0, ''),
-      array('frànçAIS is über-åwesome', 100, 0, ''),
-      array('frànçAIS is über-åwesome', -4, 2, 'so'),
-      array('frànçAIS is über-åwesome', -4, 3, 'som'),
-      array('frànçAIS is über-åwesome', -4, 4, 'some'),
-      array('frànçAIS is über-åwesome', -4, 5, 'some'),
-      array('frànçAIS is über-åwesome', -7, 10, 'åwesome'),
-      array('frànçAIS is über-åwesome', 5, -10, 'AIS is üb'),
-      array('frànçAIS is über-åwesome', 0, -10, 'frànçAIS is üb'),
-      array('frànçAIS is über-åwesome', 0, -1, 'frànçAIS is über-åwesom'),
-      array('frànçAIS is über-åwesome', -7, -2, 'åweso'),
-      array('frànçAIS is über-åwesome', -7, -6, 'å'),
-      array('frànçAIS is über-åwesome', -7, -7, ''),
-      array('frànçAIS is über-åwesome', -7, -8, ''),
-      array('...', 0, 2, '..'),
-      array('以呂波耳・ほへとち。リヌルヲ。', 1, 3, '呂波耳'),
-    );
+    return [
+      ['frànçAIS is über-åwesome', 0, NULL, 'frànçAIS is über-åwesome'],
+      ['frànçAIS is über-åwesome', 0, 0, ''],
+      ['frànçAIS is über-åwesome', 0, 1, 'f'],
+      ['frànçAIS is über-åwesome', 0, 8, 'frànçAIS'],
+      ['frànçAIS is über-åwesome', 0, 23, 'frànçAIS is über-åwesom'],
+      ['frànçAIS is über-åwesome', 0, 24, 'frànçAIS is über-åwesome'],
+      ['frànçAIS is über-åwesome', 0, 25, 'frànçAIS is über-åwesome'],
+      ['frànçAIS is über-åwesome', 0, 100, 'frànçAIS is über-åwesome'],
+      ['frànçAIS is über-åwesome', 4, 4, 'çAIS'],
+      ['frànçAIS is über-åwesome', 1, 0, ''],
+      ['frànçAIS is über-åwesome', 100, 0, ''],
+      ['frànçAIS is über-åwesome', -4, 2, 'so'],
+      ['frànçAIS is über-åwesome', -4, 3, 'som'],
+      ['frànçAIS is über-åwesome', -4, 4, 'some'],
+      ['frànçAIS is über-åwesome', -4, 5, 'some'],
+      ['frànçAIS is über-åwesome', -7, 10, 'åwesome'],
+      ['frànçAIS is über-åwesome', 5, -10, 'AIS is üb'],
+      ['frànçAIS is über-åwesome', 0, -10, 'frànçAIS is üb'],
+      ['frànçAIS is über-åwesome', 0, -1, 'frànçAIS is über-åwesom'],
+      ['frànçAIS is über-åwesome', -7, -2, 'åweso'],
+      ['frànçAIS is über-åwesome', -7, -6, 'å'],
+      ['frànçAIS is über-åwesome', -7, -7, ''],
+      ['frànçAIS is über-åwesome', -7, -8, ''],
+      ['...', 0, 2, '..'],
+      ['以呂波耳・ほへとち。リヌルヲ。', 1, 3, '呂波耳'],
+    ];
   }
 
   /**
@@ -371,52 +371,52 @@ public function testTruncate($text, $max_length, $expected, $wordsafe = FALSE, $
    *     - (optional) Boolean for the $add_ellipsis flag. Defaults to FALSE.
    */
   public function providerTruncate() {
-    return array(
-      array('frànçAIS is über-åwesome', 24, 'frànçAIS is über-åwesome'),
-      array('frànçAIS is über-åwesome', 23, 'frànçAIS is über-åwesom'),
-      array('frànçAIS is über-åwesome', 17, 'frànçAIS is über-'),
-      array('以呂波耳・ほへとち。リヌルヲ。', 6, '以呂波耳・ほ'),
-      array('frànçAIS is über-åwesome', 24, 'frànçAIS is über-åwesome', FALSE, TRUE),
-      array('frànçAIS is über-åwesome', 23, 'frànçAIS is über-åweso…', FALSE, TRUE),
-      array('frànçAIS is über-åwesome', 17, 'frànçAIS is über…', FALSE, TRUE),
-      array('123', 1, '…', TRUE, TRUE),
-      array('123', 2, '1…', TRUE, TRUE),
-      array('123', 3, '123', TRUE, TRUE),
-      array('1234', 3, '12…', TRUE, TRUE),
-      array('1234567890', 10, '1234567890', TRUE, TRUE),
-      array('12345678901', 10, '123456789…', TRUE, TRUE),
-      array('12345678901', 11, '12345678901', TRUE, TRUE),
-      array('123456789012', 11, '1234567890…', TRUE, TRUE),
-      array('12345 7890', 10, '12345 7890', TRUE, TRUE),
-      array('12345 7890', 9, '12345…', TRUE, TRUE),
-      array('123 567 90', 10, '123 567 90', TRUE, TRUE),
-      array('123 567 901', 10, '123 567…', TRUE, TRUE),
-      array('Stop. Hammertime.', 17, 'Stop. Hammertime.', TRUE, TRUE),
-      array('Stop. Hammertime.', 16, 'Stop…', TRUE, TRUE),
-      array('frànçAIS is über-åwesome', 24, 'frànçAIS is über-åwesome', TRUE, TRUE),
-      array('frànçAIS is über-åwesome', 23, 'frànçAIS is über…', TRUE, TRUE),
-      array('frànçAIS is über-åwesome', 17, 'frànçAIS is über…', TRUE, TRUE),
-      array('¿Dónde está el niño?', 20, '¿Dónde está el niño?', TRUE, TRUE),
-      array('¿Dónde está el niño?', 19, '¿Dónde está el…', TRUE, TRUE),
-      array('¿Dónde está el niño?', 13, '¿Dónde está…', TRUE, TRUE),
-      array('¿Dónde está el niño?', 10, '¿Dónde…', TRUE, TRUE),
-      array('Help! Help! Help!', 17, 'Help! Help! Help!', TRUE, TRUE),
-      array('Help! Help! Help!', 16, 'Help! Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 15, 'Help! Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 14, 'Help! Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 13, 'Help! Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 12, 'Help! Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 11, 'Help! Help…', TRUE, TRUE),
-      array('Help! Help! Help!', 10, 'Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 9, 'Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 8, 'Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 7, 'Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 6, 'Help!…', TRUE, TRUE),
-      array('Help! Help! Help!', 5, 'Help…', TRUE, TRUE),
-      array('Help! Help! Help!', 4, 'Hel…', TRUE, TRUE),
-      array('Help! Help! Help!', 3, 'He…', TRUE, TRUE),
-      array('Help! Help! Help!', 2, 'H…', TRUE, TRUE),
-    );
+    return [
+      ['frànçAIS is über-åwesome', 24, 'frànçAIS is über-åwesome'],
+      ['frànçAIS is über-åwesome', 23, 'frànçAIS is über-åwesom'],
+      ['frànçAIS is über-åwesome', 17, 'frànçAIS is über-'],
+      ['以呂波耳・ほへとち。リヌルヲ。', 6, '以呂波耳・ほ'],
+      ['frànçAIS is über-åwesome', 24, 'frànçAIS is über-åwesome', FALSE, TRUE],
+      ['frànçAIS is über-åwesome', 23, 'frànçAIS is über-åweso…', FALSE, TRUE],
+      ['frànçAIS is über-åwesome', 17, 'frànçAIS is über…', FALSE, TRUE],
+      ['123', 1, '…', TRUE, TRUE],
+      ['123', 2, '1…', TRUE, TRUE],
+      ['123', 3, '123', TRUE, TRUE],
+      ['1234', 3, '12…', TRUE, TRUE],
+      ['1234567890', 10, '1234567890', TRUE, TRUE],
+      ['12345678901', 10, '123456789…', TRUE, TRUE],
+      ['12345678901', 11, '12345678901', TRUE, TRUE],
+      ['123456789012', 11, '1234567890…', TRUE, TRUE],
+      ['12345 7890', 10, '12345 7890', TRUE, TRUE],
+      ['12345 7890', 9, '12345…', TRUE, TRUE],
+      ['123 567 90', 10, '123 567 90', TRUE, TRUE],
+      ['123 567 901', 10, '123 567…', TRUE, TRUE],
+      ['Stop. Hammertime.', 17, 'Stop. Hammertime.', TRUE, TRUE],
+      ['Stop. Hammertime.', 16, 'Stop…', TRUE, TRUE],
+      ['frànçAIS is über-åwesome', 24, 'frànçAIS is über-åwesome', TRUE, TRUE],
+      ['frànçAIS is über-åwesome', 23, 'frànçAIS is über…', TRUE, TRUE],
+      ['frànçAIS is über-åwesome', 17, 'frànçAIS is über…', TRUE, TRUE],
+      ['¿Dónde está el niño?', 20, '¿Dónde está el niño?', TRUE, TRUE],
+      ['¿Dónde está el niño?', 19, '¿Dónde está el…', TRUE, TRUE],
+      ['¿Dónde está el niño?', 13, '¿Dónde está…', TRUE, TRUE],
+      ['¿Dónde está el niño?', 10, '¿Dónde…', TRUE, TRUE],
+      ['Help! Help! Help!', 17, 'Help! Help! Help!', TRUE, TRUE],
+      ['Help! Help! Help!', 16, 'Help! Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 15, 'Help! Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 14, 'Help! Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 13, 'Help! Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 12, 'Help! Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 11, 'Help! Help…', TRUE, TRUE],
+      ['Help! Help! Help!', 10, 'Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 9, 'Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 8, 'Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 7, 'Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 6, 'Help!…', TRUE, TRUE],
+      ['Help! Help! Help!', 5, 'Help…', TRUE, TRUE],
+      ['Help! Help! Help!', 4, 'Hel…', TRUE, TRUE],
+      ['Help! Help! Help!', 3, 'He…', TRUE, TRUE],
+      ['Help! Help! Help!', 2, 'H…', TRUE, TRUE],
+    ];
   }
 
   /**
@@ -444,14 +444,14 @@ public function testTruncateBytes($text, $max_length, $expected) {
    *   self::testTruncateBytes().
    */
   public function providerTestTruncateBytes() {
-    return array(
+    return [
       // String shorter than max length.
-      array('Short string', 42, 'Short string'),
+      ['Short string', 42, 'Short string'],
       // Simple string longer than max length.
-      array('Longer string than previous.', 10, 'Longer str'),
+      ['Longer string than previous.', 10, 'Longer str'],
       // Unicode.
-      array('以呂波耳・ほへとち。リヌルヲ。', 10, '以呂波'),
-    );
+      ['以呂波耳・ほへとち。リヌルヲ。', 10, '以呂波'],
+    ];
   }
 
   /**
@@ -481,16 +481,16 @@ public function testValidateUtf8($text, $expected, $message) {
    *   self::testValidateUtf8().
    */
   public function providerTestValidateUtf8() {
-    return array(
+    return [
       // Empty string.
-      array('', TRUE, 'An empty string did not validate.'),
+      ['', TRUE, 'An empty string did not validate.'],
       // Simple text string.
-      array('Simple text.', TRUE, 'A simple ASCII text string did not validate.'),
+      ['Simple text.', TRUE, 'A simple ASCII text string did not validate.'],
       // Invalid UTF-8, overlong 5 byte encoding.
-      array(chr(0xF8) . chr(0x80) . chr(0x80) . chr(0x80) . chr(0x80), FALSE, 'Invalid UTF-8 was validated.'),
+      [chr(0xF8) . chr(0x80) . chr(0x80) . chr(0x80) . chr(0x80), FALSE, 'Invalid UTF-8 was validated.'],
       // High code-point without trailing characters.
-      array(chr(0xD0) . chr(0x01), FALSE, 'Invalid UTF-8 was validated.'),
-    );
+      [chr(0xD0) . chr(0x01), FALSE, 'Invalid UTF-8 was validated.'],
+    ];
   }
 
   /**
@@ -518,11 +518,11 @@ public function testConvertToUtf8($data, $encoding, $expected) {
    *   self::testConvertUtf8().  }
    */
   public function providerTestConvertToUtf8() {
-    return array(
-      array(chr(0x97), 'Windows-1252', '—'),
-      array(chr(0x99), 'Windows-1252', '™'),
-      array(chr(0x80), 'Windows-1252', '€'),
-    );
+    return [
+      [chr(0x97), 'Windows-1252', '—'],
+      [chr(0x99), 'Windows-1252', '™'],
+      [chr(0x80), 'Windows-1252', '€'],
+    ];
   }
 
   /**
@@ -553,18 +553,18 @@ public function testStrpos($haystack, $needle, $offset, $expected) {
    *     - The expected integer/FALSE result.
    */
   public function providerStrpos() {
-    return array(
-      array('frànçAIS is über-åwesome', 'frànçAIS is über-åwesome', 0, 0),
-      array('frànçAIS is über-åwesome', 'rànçAIS is über-åwesome', 0, 1),
-      array('frànçAIS is über-åwesome', 'not in string', 0, FALSE),
-      array('frànçAIS is über-åwesome', 'r', 0, 1),
-      array('frànçAIS is über-åwesome', 'nçAIS', 0, 3),
-      array('frànçAIS is über-åwesome', 'nçAIS', 2, 3),
-      array('frànçAIS is über-åwesome', 'nçAIS', 3, 3),
-      array('以呂波耳・ほへとち。リヌルヲ。', '波耳', 0, 2),
-      array('以呂波耳・ほへとち。リヌルヲ。', '波耳', 1, 2),
-      array('以呂波耳・ほへとち。リヌルヲ。', '波耳', 2, 2),
-    );
+    return [
+      ['frànçAIS is über-åwesome', 'frànçAIS is über-åwesome', 0, 0],
+      ['frànçAIS is über-åwesome', 'rànçAIS is über-åwesome', 0, 1],
+      ['frànçAIS is über-åwesome', 'not in string', 0, FALSE],
+      ['frànçAIS is über-åwesome', 'r', 0, 1],
+      ['frànçAIS is über-åwesome', 'nçAIS', 0, 3],
+      ['frànçAIS is über-åwesome', 'nçAIS', 2, 3],
+      ['frànçAIS is über-åwesome', 'nçAIS', 3, 3],
+      ['以呂波耳・ほへとち。リヌルヲ。', '波耳', 0, 2],
+      ['以呂波耳・ほへとち。リヌルヲ。', '波耳', 1, 2],
+      ['以呂波耳・ほへとち。リヌルヲ。', '波耳', 2, 2],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php b/core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php
index 87ab75f09c4384f190f7e6471ae813a71d8aeb8e..e487831b2f58c97244f52f7ad85d40508ed92884 100644
--- a/core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php
@@ -18,13 +18,13 @@ class UrlHelperTest extends UnitTestCase {
    * @return array
    */
   public function providerTestBuildQuery() {
-    return array(
-      array(array('a' => ' &#//+%20@۞'), 'a=%20%26%23//%2B%2520%40%DB%9E', 'Value was properly encoded.'),
-      array(array(' &#//+%20@۞' => 'a'), '%20%26%23%2F%2F%2B%2520%40%DB%9E=a', 'Key was properly encoded.'),
-      array(array('a' => '1', 'b' => '2', 'c' => '3'), 'a=1&b=2&c=3', 'Multiple values were properly concatenated.'),
-      array(array('a' => array('b' => '2', 'c' => '3'), 'd' => 'foo'), 'a[b]=2&a[c]=3&d=foo', 'Nested array was properly encoded.'),
-      array(array('foo' => NULL), 'foo', 'Simple parameters are properly added.'),
-    );
+    return [
+      [['a' => ' &#//+%20@۞'], 'a=%20%26%23//%2B%2520%40%DB%9E', 'Value was properly encoded.'],
+      [[' &#//+%20@۞' => 'a'], '%20%26%23%2F%2F%2B%2520%40%DB%9E=a', 'Key was properly encoded.'],
+      [['a' => '1', 'b' => '2', 'c' => '3'], 'a=1&b=2&c=3', 'Multiple values were properly concatenated.'],
+      [['a' => ['b' => '2', 'c' => '3'], 'd' => 'foo'], 'a[b]=2&a[c]=3&d=foo', 'Nested array was properly encoded.'],
+      [['foo' => NULL], 'foo', 'Simple parameters are properly added.'],
+    ];
   }
 
   /**
@@ -50,7 +50,7 @@ public function testBuildQuery($query, $expected, $message) {
    * @return array
    */
   public function providerTestValidAbsoluteData() {
-    $urls = array(
+    $urls = [
       'example.com',
       'www.example.com',
       'ex-ample.com',
@@ -69,7 +69,7 @@ public function providerTestValidAbsoluteData() {
       'example.org/~,$\'*;',
       'caf%C3%A9.example.org',
       '[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]:80/index.html',
-    );
+    ];
 
     return $this->dataEnhanceWithScheme($urls);
   }
@@ -97,11 +97,11 @@ public function testValidAbsolute($url, $scheme) {
    * @return array
    */
   public function providerTestInvalidAbsolute() {
-    $data = array(
+    $data = [
       '',
       'ex!ample.com',
       'ex%ample.com',
-    );
+    ];
     return $this->dataEnhanceWithScheme($data);
   }
 
@@ -128,13 +128,13 @@ public function testInvalidAbsolute($url, $scheme) {
    * @return array
    */
   public function providerTestValidRelativeData() {
-    $data = array(
+    $data = [
       'paren(the)sis',
       'index.html#pagetop',
       'index.php/node',
       'index.php/node?param=false',
       'login.php?do=login&style=%23#pagetop',
-    );
+    ];
 
     return $this->dataEnhanceWithPrefix($data);
   }
@@ -162,11 +162,11 @@ public function testValidRelative($url, $prefix) {
    * @return array
    */
   public function providerTestInvalidRelativeData() {
-    $data = array(
+    $data = [
       'ex^mple',
       'example<>',
       'ex%ample',
-    );
+    ];
     return $this->dataEnhanceWithPrefix($data);
   }
 
@@ -212,20 +212,20 @@ public function testFilterQueryParameters($query, $exclude, $expected) {
    * @return array
    */
   public static function providerTestFilterQueryParameters() {
-    return array(
+    return [
       // Test without an exclude filter.
-      array(
-        'query' => array('a' => array('b' => 'c')),
-        'exclude' => array(),
-        'expected' => array('a' => array('b' => 'c')),
-      ),
+      [
+        'query' => ['a' => ['b' => 'c']],
+        'exclude' => [],
+        'expected' => ['a' => ['b' => 'c']],
+      ],
       // Exclude the 'b' element.
-      array(
-        'query' => array('a' => array('b' => 'c', 'd' => 'e')),
-        'exclude' => array('a[b]'),
-        'expected' => array('a' => array('d' => 'e')),
-      ),
-    );
+      [
+        'query' => ['a' => ['b' => 'c', 'd' => 'e']],
+        'exclude' => ['a[b]'],
+        'expected' => ['a' => ['d' => 'e']],
+      ],
+    ];
   }
 
   /**
@@ -250,52 +250,52 @@ public function testParse($url, $expected) {
    * @return array
    */
   public static function providerTestParse() {
-    return array(
-      array(
+    return [
+      [
         'http://www.example.com/my/path',
-        array(
+        [
           'path' => 'http://www.example.com/my/path',
-          'query' => array(),
+          'query' => [],
           'fragment' => '',
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'http://www.example.com/my/path?destination=home#footer',
-        array(
+        [
           'path' => 'http://www.example.com/my/path',
-          'query' => array(
+          'query' => [
             'destination' => 'home',
-          ),
+          ],
           'fragment' => 'footer',
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'http://',
-        array(
+        [
           'path' => '',
-          'query' => array(),
+          'query' => [],
           'fragment' => '',
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         'https://',
-        array(
+        [
           'path' => '',
-          'query' => array(),
+          'query' => [],
           'fragment' => '',
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         '/my/path?destination=home#footer',
-        array(
+        [
           'path' => '/my/path',
-          'query' => array(
+          'query' => [
             'destination' => 'home',
-          ),
+          ],
           'fragment' => 'footer',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -320,10 +320,10 @@ public function testEncodePath($path, $expected) {
    * @return array
    */
   public static function providerTestEncodePath() {
-    return array(
-      array('unencoded path with spaces', 'unencoded%20path%20with%20spaces'),
-      array('slashes/should/be/preserved', 'slashes/should/be/preserved'),
-    );
+    return [
+      ['unencoded path with spaces', 'unencoded%20path%20with%20spaces'],
+      ['slashes/should/be/preserved', 'slashes/should/be/preserved'],
+    ];
   }
 
   /**
@@ -348,39 +348,39 @@ public function testIsExternal($path, $expected) {
    * @return array
    */
   public static function providerTestIsExternal() {
-    return array(
-      array('/internal/path', FALSE),
-      array('https://example.com/external/path', TRUE),
-      array('javascript://fake-external-path', FALSE),
+    return [
+      ['/internal/path', FALSE],
+      ['https://example.com/external/path', TRUE],
+      ['javascript://fake-external-path', FALSE],
       // External URL without an explicit protocol.
-      array('//www.drupal.org/foo/bar?foo=bar&bar=baz&baz#foo', TRUE),
+      ['//www.drupal.org/foo/bar?foo=bar&bar=baz&baz#foo', TRUE],
       // Internal URL starting with a slash.
-      array('/www.drupal.org', FALSE),
+      ['/www.drupal.org', FALSE],
       // Simple external URLs.
-      array('http://example.com', TRUE),
-      array('https://example.com', TRUE),
-      array('http://drupal.org/foo/bar?foo=bar&bar=baz&baz#foo', TRUE),
-      array('//drupal.org', TRUE),
+      ['http://example.com', TRUE],
+      ['https://example.com', TRUE],
+      ['http://drupal.org/foo/bar?foo=bar&bar=baz&baz#foo', TRUE],
+      ['//drupal.org', TRUE],
       // Some browsers ignore or strip leading control characters.
-      array("\x00//www.example.com", TRUE),
-      array("\x08//www.example.com", TRUE),
-      array("\x1F//www.example.com", TRUE),
-      array("\n//www.example.com", TRUE),
+      ["\x00//www.example.com", TRUE],
+      ["\x08//www.example.com", TRUE],
+      ["\x1F//www.example.com", TRUE],
+      ["\n//www.example.com", TRUE],
       // JSON supports decoding directly from UTF-8 code points.
-      array(json_decode('"\u00AD"') . "//www.example.com", TRUE),
-      array(json_decode('"\u200E"') . "//www.example.com", TRUE),
-      array(json_decode('"\uE0020"') . "//www.example.com", TRUE),
-      array(json_decode('"\uE000"') . "//www.example.com", TRUE),
+      [json_decode('"\u00AD"') . "//www.example.com", TRUE],
+      [json_decode('"\u200E"') . "//www.example.com", TRUE],
+      [json_decode('"\uE0020"') . "//www.example.com", TRUE],
+      [json_decode('"\uE000"') . "//www.example.com", TRUE],
       // Backslashes should be normalized to forward.
-      array('\\\\example.com', TRUE),
+      ['\\\\example.com', TRUE],
       // Local URLs.
-      array('node', FALSE),
-      array('/system/ajax', FALSE),
-      array('?q=foo:bar', FALSE),
-      array('node/edit:me', FALSE),
-      array('/drupal.org', FALSE),
-      array('<front>', FALSE),
-    );
+      ['node', FALSE],
+      ['/system/ajax', FALSE],
+      ['?q=foo:bar', FALSE],
+      ['node/edit:me', FALSE],
+      ['/drupal.org', FALSE],
+      ['<front>', FALSE],
+    ];
   }
 
   /**
@@ -411,15 +411,15 @@ public function testFilterBadProtocol($uri, $expected, $protocols) {
    * @return array
    */
   public static function providerTestFilterBadProtocol() {
-    return array(
-      array('javascript://example.com?foo&bar', '//example.com?foo&amp;bar', array('http', 'https')),
+    return [
+      ['javascript://example.com?foo&bar', '//example.com?foo&amp;bar', ['http', 'https']],
       // Test custom protocols.
-      array('http://example.com?foo&bar', '//example.com?foo&amp;bar', array('https')),
+      ['http://example.com?foo&bar', '//example.com?foo&amp;bar', ['https']],
       // Valid protocol.
-      array('http://example.com?foo&bar', 'http://example.com?foo&amp;bar', array('https', 'http')),
+      ['http://example.com?foo&bar', 'http://example.com?foo&amp;bar', ['https', 'http']],
       // Colon not part of the URL scheme.
-      array('/test:8888?foo&bar', '/test:8888?foo&amp;bar', array('http')),
-    );
+      ['/test:8888?foo&bar', '/test:8888?foo&amp;bar', ['http']],
+    ];
   }
 
   /**
@@ -448,15 +448,15 @@ public function testStripDangerousProtocols($uri, $expected, $protocols) {
    * @return array
    */
   public static function providerTestStripDangerousProtocols() {
-    return array(
-      array('javascript://example.com', '//example.com', array('http', 'https')),
+    return [
+      ['javascript://example.com', '//example.com', ['http', 'https']],
       // Test custom protocols.
-      array('http://example.com', '//example.com', array('https')),
+      ['http://example.com', '//example.com', ['https']],
       // Valid protocol.
-      array('http://example.com', 'http://example.com', array('https', 'http')),
+      ['http://example.com', 'http://example.com', ['https', 'http']],
       // Colon not part of the URL scheme.
-      array('/test:8888', '/test:8888', array('http')),
-    );
+      ['/test:8888', '/test:8888', ['http']],
+    ];
   }
 
   /**
@@ -469,11 +469,11 @@ public static function providerTestStripDangerousProtocols() {
    *   A list of provider data with schemes.
    */
   protected function dataEnhanceWithScheme(array $urls) {
-    $url_schemes = array('http', 'https', 'ftp');
-    $data = array();
+    $url_schemes = ['http', 'https', 'ftp'];
+    $data = [];
     foreach ($url_schemes as $scheme) {
       foreach ($urls as $url) {
-        $data[] = array($url, $scheme);
+        $data[] = [$url, $scheme];
       }
     }
     return $data;
@@ -489,11 +489,11 @@ protected function dataEnhanceWithScheme(array $urls) {
    *   A list of provider data with prefixes.
    */
   protected function dataEnhanceWithPrefix(array $urls) {
-    $prefixes = array('', '/');
-    $data = array();
+    $prefixes = ['', '/'];
+    $data = [];
     foreach ($prefixes as $prefix) {
       foreach ($urls as $url) {
-        $data[] = array($url, $prefix);
+        $data[] = [$url, $prefix];
       }
     }
     return $data;
@@ -523,31 +523,31 @@ public function testExternalIsLocal($url, $base_url, $expected) {
    * @see \Drupal\Tests\Component\Utility\UrlHelperTest::testExternalIsLocal()
    */
   public function providerTestExternalIsLocal() {
-    return array(
+    return [
       // Different mixes of trailing slash.
-      array('http://example.com', 'http://example.com', TRUE),
-      array('http://example.com/', 'http://example.com', TRUE),
-      array('http://example.com', 'http://example.com/', TRUE),
-      array('http://example.com/', 'http://example.com/', TRUE),
+      ['http://example.com', 'http://example.com', TRUE],
+      ['http://example.com/', 'http://example.com', TRUE],
+      ['http://example.com', 'http://example.com/', TRUE],
+      ['http://example.com/', 'http://example.com/', TRUE],
       // Sub directory of site.
-      array('http://example.com/foo', 'http://example.com/', TRUE),
-      array('http://example.com/foo/bar', 'http://example.com/foo', TRUE),
-      array('http://example.com/foo/bar', 'http://example.com/foo/', TRUE),
+      ['http://example.com/foo', 'http://example.com/', TRUE],
+      ['http://example.com/foo/bar', 'http://example.com/foo', TRUE],
+      ['http://example.com/foo/bar', 'http://example.com/foo/', TRUE],
       // Different sub-domain.
-      array('http://example.com', 'http://www.example.com/', FALSE),
-      array('http://example.com/', 'http://www.example.com/', FALSE),
-      array('http://example.com/foo', 'http://www.example.com/', FALSE),
+      ['http://example.com', 'http://www.example.com/', FALSE],
+      ['http://example.com/', 'http://www.example.com/', FALSE],
+      ['http://example.com/foo', 'http://www.example.com/', FALSE],
       // Different TLD.
-      array('http://example.com', 'http://example.ca', FALSE),
-      array('http://example.com', 'http://example.ca/', FALSE),
-      array('http://example.com/', 'http://example.ca/', FALSE),
-      array('http://example.com/foo', 'http://example.ca', FALSE),
-      array('http://example.com/foo', 'http://example.ca/', FALSE),
+      ['http://example.com', 'http://example.ca', FALSE],
+      ['http://example.com', 'http://example.ca/', FALSE],
+      ['http://example.com/', 'http://example.ca/', FALSE],
+      ['http://example.com/foo', 'http://example.ca', FALSE],
+      ['http://example.com/foo', 'http://example.ca/', FALSE],
       // Different site path.
-      array('http://example.com/foo', 'http://example.com/bar', FALSE),
-      array('http://example.com', 'http://example.com/bar', FALSE),
-      array('http://example.com/bar', 'http://example.com/bar/', FALSE),
-    );
+      ['http://example.com/foo', 'http://example.com/bar', FALSE],
+      ['http://example.com', 'http://example.com/bar', FALSE],
+      ['http://example.com/bar', 'http://example.com/bar/', FALSE],
+    ];
   }
 
   /**
@@ -572,17 +572,17 @@ public function testExternalIsLocalInvalid($url, $base_url) {
    * @see \Drupal\Tests\Component\Utility\UrlHelperTest::testExternalIsLocalInvalid()
    */
   public function providerTestExternalIsLocalInvalid() {
-    return array(
-      array('http://example.com/foo', ''),
-      array('http://example.com/foo', 'bar'),
-      array('http://example.com/foo', 'http://'),
+    return [
+      ['http://example.com/foo', ''],
+      ['http://example.com/foo', 'bar'],
+      ['http://example.com/foo', 'http://'],
       // Invalid destination urls.
-      array('', 'http://example.com/foo'),
-      array('bar', 'http://example.com/foo'),
-      array('/bar', 'http://example.com/foo'),
-      array('bar/', 'http://example.com/foo'),
-      array('http://', 'http://example.com/foo'),
-    );
+      ['', 'http://example.com/foo'],
+      ['bar', 'http://example.com/foo'],
+      ['/bar', 'http://example.com/foo'],
+      ['bar/', 'http://example.com/foo'],
+      ['http://', 'http://example.com/foo'],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Utility/UserAgentTest.php b/core/tests/Drupal/Tests/Component/Utility/UserAgentTest.php
index 67fa940ece9cd6b48d3db95cc906621e46f84c62..d804e1aab37677d6da7d41c77a233673023ac62d 100644
--- a/core/tests/Drupal/Tests/Component/Utility/UserAgentTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/UserAgentTest.php
@@ -21,7 +21,7 @@ class UserAgentTest extends UnitTestCase {
    *   Language codes, ordered by priority.
    */
   protected function getLanguages() {
-    return array(
+    return [
       // In our test case, 'en' has priority over 'en-US'.
       'en',
       'en-US',
@@ -39,7 +39,7 @@ protected function getLanguages() {
       'zh-hans',
       'zh-hant',
       'zh-hant-tw',
-    );
+    ];
   }
 
   /**
@@ -49,7 +49,7 @@ protected function getLanguages() {
    *   Language mappings.
    */
   protected function getMappings() {
-    return array(
+    return [
       'no' => 'nb',
       'pt' => 'pt-pt',
       'zh' => 'zh-hans',
@@ -60,7 +60,7 @@ protected function getMappings() {
       'zh-cn' => 'zh-hans',
       'zh-sg' => 'zh-hans',
       'zh-chs' => 'zh-hans',
-    );
+    ];
   }
 
   /**
@@ -82,86 +82,86 @@ public function testGetBestMatchingLangcode($accept_language, $expected) {
    *   - Expected best matching language code.
    */
   public function providerTestGetBestMatchingLangcode() {
-    return array(
+    return [
       // Equal qvalue for each language, choose the site preferred one.
-      array('en,en-US,fr-CA,fr,es-MX', 'en'),
-      array('en-US,en,fr-CA,fr,es-MX', 'en'),
-      array('fr,en', 'en'),
-      array('en,fr', 'en'),
-      array('en-US,fr', 'en-US'),
-      array('fr,en-US', 'en-US'),
-      array('fr,fr-CA', 'fr-CA'),
-      array('fr-CA,fr', 'fr-CA'),
-      array('fr', 'fr-CA'),
-      array('fr;q=1', 'fr-CA'),
-      array('fr,es-MX', 'fr-CA'),
-      array('fr,es', 'fr-CA'),
-      array('es,fr', 'fr-CA'),
-      array('es-MX,de', 'es-MX'),
-      array('de,es-MX', 'es-MX'),
+      ['en,en-US,fr-CA,fr,es-MX', 'en'],
+      ['en-US,en,fr-CA,fr,es-MX', 'en'],
+      ['fr,en', 'en'],
+      ['en,fr', 'en'],
+      ['en-US,fr', 'en-US'],
+      ['fr,en-US', 'en-US'],
+      ['fr,fr-CA', 'fr-CA'],
+      ['fr-CA,fr', 'fr-CA'],
+      ['fr', 'fr-CA'],
+      ['fr;q=1', 'fr-CA'],
+      ['fr,es-MX', 'fr-CA'],
+      ['fr,es', 'fr-CA'],
+      ['es,fr', 'fr-CA'],
+      ['es-MX,de', 'es-MX'],
+      ['de,es-MX', 'es-MX'],
 
       // Different cases and whitespace.
-      array('en', 'en'),
-      array('En', 'en'),
-      array('EN', 'en'),
-      array(' en', 'en'),
-      array('en ', 'en'),
-      array('en, fr', 'en'),
+      ['en', 'en'],
+      ['En', 'en'],
+      ['EN', 'en'],
+      [' en', 'en'],
+      ['en ', 'en'],
+      ['en, fr', 'en'],
 
       // A less specific language from the browser matches a more specific one
       // from the website, and the other way around for compatibility with
       // some versions of Internet Explorer.
-      array('es', 'es-MX'),
-      array('es-MX', 'es-MX'),
-      array('pt', 'pt'),
-      array('pt-PT', 'pt'),
-      array('pt-PT;q=0.5,pt-BR;q=1,en;q=0.7', 'en'),
-      array('pt-PT;q=1,pt-BR;q=0.5,en;q=0.7', 'en'),
-      array('pt-PT;q=0.4,pt-BR;q=0.1,en;q=0.7', 'en'),
-      array('pt-PT;q=0.1,pt-BR;q=0.4,en;q=0.7', 'en'),
+      ['es', 'es-MX'],
+      ['es-MX', 'es-MX'],
+      ['pt', 'pt'],
+      ['pt-PT', 'pt'],
+      ['pt-PT;q=0.5,pt-BR;q=1,en;q=0.7', 'en'],
+      ['pt-PT;q=1,pt-BR;q=0.5,en;q=0.7', 'en'],
+      ['pt-PT;q=0.4,pt-BR;q=0.1,en;q=0.7', 'en'],
+      ['pt-PT;q=0.1,pt-BR;q=0.4,en;q=0.7', 'en'],
 
       // Language code with several dashes are valid. The less specific language
       // from the browser matches the more specific one from the website.
-      array('eh-oh-laa-laa', 'eh-oh-laa-laa'),
-      array('eh-oh-laa', 'eh-oh-laa-laa'),
-      array('eh-oh', 'eh-oh-laa-laa'),
-      array('eh', 'eh-oh-laa-laa'),
+      ['eh-oh-laa-laa', 'eh-oh-laa-laa'],
+      ['eh-oh-laa', 'eh-oh-laa-laa'],
+      ['eh-oh', 'eh-oh-laa-laa'],
+      ['eh', 'eh-oh-laa-laa'],
 
       // Different qvalues.
-      array('fr,en;q=0.5', 'fr-CA'),
-      array('fr,en;q=0.5,fr-CA;q=0.25', 'fr'),
+      ['fr,en;q=0.5', 'fr-CA'],
+      ['fr,en;q=0.5,fr-CA;q=0.25', 'fr'],
 
       // Silly wildcards are also valid.
-      array('*,fr-CA;q=0.5', 'en'),
-      array('*,en;q=0.25', 'fr-CA'),
-      array('en,en-US;q=0.5,fr;q=0.25', 'en'),
-      array('en-US,en;q=0.5,fr;q=0.25', 'en-US'),
+      ['*,fr-CA;q=0.5', 'en'],
+      ['*,en;q=0.25', 'fr-CA'],
+      ['en,en-US;q=0.5,fr;q=0.25', 'en'],
+      ['en-US,en;q=0.5,fr;q=0.25', 'en-US'],
 
       // Unresolvable cases.
-      array('', FALSE),
-      array('de,pl', FALSE),
-      array('iecRswK4eh', FALSE),
-      array($this->randomMachineName(10), FALSE),
+      ['', FALSE],
+      ['de,pl', FALSE],
+      ['iecRswK4eh', FALSE],
+      [$this->randomMachineName(10), FALSE],
 
       // Chinese langcodes.
-      array('zh-cn, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hans'),
-      array('zh-tw, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hant'),
-      array('zh-hant, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hant'),
-      array('zh-hans, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hans'),
+      ['zh-cn, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hans'],
+      ['zh-tw, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hant'],
+      ['zh-hant, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hant'],
+      ['zh-hans, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hans'],
       // @todo: This is copied from RFC4647 but our regex skips the numbers so
       // they where removed. Our code should be updated so private1-private2 is
       // valid. http://tools.ietf.org/html/rfc4647#section-3.4
-      array('zh-hant-CN-x-private-private, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hant'),
-      array('zh-cn', 'zh-hans'),
-      array('zh-sg', 'zh-hans'),
-      array('zh-tw', 'zh-hant'),
-      array('zh-hk', 'zh-hant'),
-      array('zh-mo', 'zh-hant'),
-      array('zh-hans', 'zh-hans'),
-      array('zh-hant', 'zh-hant'),
-      array('zh-chs', 'zh-hans'),
-      array('zh-cht', 'zh-hant'),
-    );
+      ['zh-hant-CN-x-private-private, en-us;q=0.90, en;q=0.80, zh;q=0.70', 'zh-hant'],
+      ['zh-cn', 'zh-hans'],
+      ['zh-sg', 'zh-hans'],
+      ['zh-tw', 'zh-hant'],
+      ['zh-hk', 'zh-hant'],
+      ['zh-mo', 'zh-hant'],
+      ['zh-hans', 'zh-hans'],
+      ['zh-hant', 'zh-hant'],
+      ['zh-chs', 'zh-hans'],
+      ['zh-cht', 'zh-hant'],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Component/Utility/VariableTest.php b/core/tests/Drupal/Tests/Component/Utility/VariableTest.php
index 0aef6d0688c8ca1c70ffcd2f1052f4efbae6405c..9096f87bfe98f6f6597cc78a5fe7e53a65ea1c00 100644
--- a/core/tests/Drupal/Tests/Component/Utility/VariableTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/VariableTest.php
@@ -29,72 +29,72 @@ class VariableTest extends UnitTestCase {
    *     - The variable to export.
    */
   public function providerTestExport() {
-    return array(
+    return [
       // Array.
-      array(
+      [
         'array()',
-        array(),
-      ),
-      array(
+        [],
+      ],
+      [
         // non-associative.
         "array(\n  1,\n  2,\n  3,\n  4,\n)",
-        array(1, 2, 3, 4),
-      ),
-      array(
+        [1, 2, 3, 4],
+      ],
+      [
         // associative.
         "array(\n  'a' => 1,\n)",
-        array('a' => 1),
-      ),
+        ['a' => 1],
+      ],
       // Bool.
-      array(
+      [
         'TRUE',
         TRUE,
-      ),
-      array(
+      ],
+      [
         'FALSE',
         FALSE,
-      ),
+      ],
       // Strings.
-      array(
+      [
         "'string'",
         'string',
-      ),
-      array(
+      ],
+      [
         '"\n\r\t"',
         "\n\r\t",
-      ),
-      array(
+      ],
+      [
         // 2 backslashes. \\
         "'\\'",
         '\\',
-      ),
-      array(
+      ],
+      [
         // Double-quote "
         "'\"'",
         "\"",
-      ),
-      array(
+      ],
+      [
         // Single-quote '
         '"\'"',
         "'",
-      ),
-      array(
+      ],
+      [
         // Quotes with $ symbols.
         '"\$settings[\'foo\']"',
         '$settings[\'foo\']',
-      ),
+      ],
       // Object.
-      array(
+      [
         // A stdClass object.
         '(object) array()',
         new \stdClass(),
-      ),
-      array(
+      ],
+      [
         // A not-stdClass object.
         "Drupal\Tests\Component\Utility\StubVariableTestClass::__set_state(array(\n))",
         new StubVariableTestClass(),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/Utility/XssTest.php b/core/tests/Drupal/Tests/Component/Utility/XssTest.php
index 0b2f51e1f41c4bc42eaab34bce6d129ea156d2ea..e7832a31f0f05079c6e8661e517f935fe80da89b 100644
--- a/core/tests/Drupal/Tests/Component/Utility/XssTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/XssTest.php
@@ -28,7 +28,7 @@ class XssTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
 
-    $allowed_protocols = array(
+    $allowed_protocols = [
       'http',
       'https',
       'ftp',
@@ -41,7 +41,7 @@ protected function setUp() {
       'sftp',
       'webcal',
       'rtsp',
-    );
+    ];
     UrlHelper::setAllowedProtocols($allowed_protocols);
   }
 
@@ -86,30 +86,30 @@ public function testFilterXssNormalized($value, $expected, $message, array $allo
    *       \Drupal\Component\Utility\Xss::filter().
    */
   public function providerTestFilterXssNormalized() {
-    return array(
-      array(
+    return [
+      [
         "Who&#039;s Online",
         "who's online",
         'HTML filter -- html entity number',
-      ),
-      array(
+      ],
+      [
         "Who&amp;#039;s Online",
         "who&#039;s online",
         'HTML filter -- encoded html entity number',
-      ),
-      array(
+      ],
+      [
         "Who&amp;amp;#039; Online",
         "who&amp;#039; online",
         'HTML filter -- double encoded html entity number',
-      ),
+      ],
       // Custom elements with dashes in the tag name.
-      array(
+      [
         "<test-element></test-element>",
         "<test-element></test-element>",
         'Custom element with dashes in tag name.',
-        array('test-element'),
-      ),
-    );
+        ['test-element'],
+      ],
+    ];
   }
 
   /**
@@ -153,289 +153,289 @@ public function testFilterXssNotNormalized($value, $expected, $message, array $a
    *       \Drupal\Component\Utility\Xss::filter().
    */
   public function providerTestFilterXssNotNormalized() {
-    $cases = array(
+    $cases = [
       // Tag stripping, different ways to work around removal of HTML tags.
-      array(
+      [
         '<script>alert(0)</script>',
         'script',
         'HTML tag stripping -- simple script without special characters.',
-      ),
-      array(
+      ],
+      [
         '<script src="http://www.example.com" />',
         'script',
         'HTML tag stripping -- empty script with source.',
-      ),
-      array(
+      ],
+      [
         '<ScRipt sRc=http://www.example.com/>',
         'script',
         'HTML tag stripping evasion -- varying case.',
-      ),
-      array(
+      ],
+      [
         "<script\nsrc\n=\nhttp://www.example.com/\n>",
         'script',
         'HTML tag stripping evasion -- multiline tag.',
-      ),
-      array(
+      ],
+      [
         '<script/a src=http://www.example.com/a.js></script>',
         'script',
         'HTML tag stripping evasion -- non whitespace character after tag name.',
-      ),
-      array(
+      ],
+      [
         '<script/src=http://www.example.com/a.js></script>',
         'script',
         'HTML tag stripping evasion -- no space between tag and attribute.',
-      ),
+      ],
       // Null between < and tag name works at least with IE6.
-      array(
+      [
         "<\0scr\0ipt>alert(0)</script>",
         'ipt',
         'HTML tag stripping evasion -- breaking HTML with nulls.',
-      ),
-      array(
+      ],
+      [
         "<scrscriptipt src=http://www.example.com/a.js>",
         'script',
         'HTML tag stripping evasion -- filter just removing "script".',
-      ),
-      array(
+      ],
+      [
         '<<script>alert(0);//<</script>',
         'script',
         'HTML tag stripping evasion -- double opening brackets.',
-      ),
-      array(
+      ],
+      [
         '<script src=http://www.example.com/a.js?<b>',
         'script',
         'HTML tag stripping evasion -- no closing tag.',
-      ),
+      ],
       // DRUPAL-SA-2008-047: This doesn't seem exploitable, but the filter should
       // work consistently.
-      array(
+      [
         '<script>>',
         'script',
         'HTML tag stripping evasion -- double closing tag.',
-      ),
-      array(
+      ],
+      [
         '<script src=//www.example.com/.a>',
         'script',
         'HTML tag stripping evasion -- no scheme or ending slash.',
-      ),
-      array(
+      ],
+      [
         '<script src=http://www.example.com/.a',
         'script',
         'HTML tag stripping evasion -- no closing bracket.',
-      ),
-      array(
+      ],
+      [
         '<script src=http://www.example.com/ <',
         'script',
         'HTML tag stripping evasion -- opening instead of closing bracket.',
-      ),
-      array(
+      ],
+      [
         '<nosuchtag attribute="newScriptInjectionVector">',
         'nosuchtag',
         'HTML tag stripping evasion -- unknown tag.',
-      ),
-      array(
+      ],
+      [
         '<t:set attributeName="innerHTML" to="&lt;script defer&gt;alert(0)&lt;/script&gt;">',
         't:set',
         'HTML tag stripping evasion -- colon in the tag name (namespaces\' tricks).',
-      ),
-      array(
+      ],
+      [
         '<img """><script>alert(0)</script>',
         'script',
         'HTML tag stripping evasion -- a malformed image tag.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<blockquote><script>alert(0)</script></blockquote>',
         'script',
         'HTML tag stripping evasion -- script in a blockqoute.',
-        array('blockquote'),
-      ),
-      array(
+        ['blockquote'],
+      ],
+      [
         "<!--[if true]><script>alert(0)</script><![endif]-->",
         'script',
         'HTML tag stripping evasion -- script within a comment.',
-      ),
+      ],
       // Dangerous attributes removal.
-      array(
+      [
         '<p onmouseover="http://www.example.com/">',
         'onmouseover',
         'HTML filter attributes removal -- events, no evasion.',
-        array('p'),
-      ),
-      array(
+        ['p'],
+      ],
+      [
         '<li style="list-style-image: url(javascript:alert(0))">',
         'style',
         'HTML filter attributes removal -- style, no evasion.',
-        array('li'),
-      ),
-      array(
+        ['li'],
+      ],
+      [
         '<img onerror   =alert(0)>',
         'onerror',
         'HTML filter attributes removal evasion -- spaces before equals sign.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img onabort!#$%&()*~+-_.,:;?@[/|\]^`=alert(0)>',
         'onabort',
         'HTML filter attributes removal evasion -- non alphanumeric characters before equals sign.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img oNmediAError=alert(0)>',
         'onmediaerror',
         'HTML filter attributes removal evasion -- varying case.',
-        array('img'),
-      ),
+        ['img'],
+      ],
       // Works at least with IE6.
-      array(
+      [
         "<img o\0nfocus\0=alert(0)>",
         'focus',
         'HTML filter attributes removal evasion -- breaking with nulls.',
-        array('img'),
-      ),
+        ['img'],
+      ],
       // Only whitelisted scheme names allowed in attributes.
-      array(
+      [
         '<img src="javascript:alert(0)">',
         'javascript',
         'HTML scheme clearing -- no evasion.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src=javascript:alert(0)>',
         'javascript',
         'HTML scheme clearing evasion -- no quotes.',
-        array('img'),
-      ),
+        ['img'],
+      ],
       // A bit like CVE-2006-0070.
-      array(
+      [
         '<img src="javascript:confirm(0)">',
         'javascript',
         'HTML scheme clearing evasion -- no alert ;)',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src=`javascript:alert(0)`>',
         'javascript',
         'HTML scheme clearing evasion -- grave accents.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img dynsrc="javascript:alert(0)">',
         'javascript',
         'HTML scheme clearing -- rare attribute.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<table background="javascript:alert(0)">',
         'javascript',
         'HTML scheme clearing -- another tag.',
-        array('table'),
-      ),
-      array(
+        ['table'],
+      ],
+      [
         '<base href="javascript:alert(0);//">',
         'javascript',
         'HTML scheme clearing -- one more attribute and tag.',
-        array('base'),
-      ),
-      array(
+        ['base'],
+      ],
+      [
         '<img src="jaVaSCriPt:alert(0)">',
         'javascript',
         'HTML scheme clearing evasion -- varying case.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src=&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#48;&#41;>',
         'javascript',
         'HTML scheme clearing evasion -- UTF-8 decimal encoding.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src=&#00000106&#0000097&#00000118&#0000097&#00000115&#0000099&#00000114&#00000105&#00000112&#00000116&#0000058&#0000097&#00000108&#00000101&#00000114&#00000116&#0000040&#0000048&#0000041>',
         'javascript',
         'HTML scheme clearing evasion -- long UTF-8 encoding.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x30&#x29>',
         'javascript',
         'HTML scheme clearing evasion -- UTF-8 hex encoding.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         "<img src=\"jav\tascript:alert(0)\">",
         'script',
         'HTML scheme clearing evasion -- an embedded tab.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src="jav&#x09;ascript:alert(0)">',
         'script',
         'HTML scheme clearing evasion -- an encoded, embedded tab.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src="jav&#x000000A;ascript:alert(0)">',
         'script',
         'HTML scheme clearing evasion -- an encoded, embedded newline.',
-        array('img'),
-      ),
+        ['img'],
+      ],
       // With &#xD; this test would fail, but the entity gets turned into
       // &amp;#xD;, so it's OK.
-      array(
+      [
         '<img src="jav&#x0D;ascript:alert(0)">',
         'script',
         'HTML scheme clearing evasion -- an encoded, embedded carriage return.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         "<img src=\"\n\n\nj\na\nva\ns\ncript:alert(0)\">",
         'cript',
         'HTML scheme clearing evasion -- broken into many lines.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         "<img src=\"jav\0a\0\0cript:alert(0)\">",
         'cript',
         'HTML scheme clearing evasion -- embedded nulls.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src="vbscript:msgbox(0)">',
         'vbscript',
         'HTML scheme clearing evasion -- another scheme.',
-        array('img'),
-      ),
-      array(
+        ['img'],
+      ],
+      [
         '<img src="nosuchscheme:notice(0)">',
         'nosuchscheme',
         'HTML scheme clearing evasion -- unknown scheme.',
-        array('img'),
-      ),
+        ['img'],
+      ],
       // Netscape 4.x javascript entities.
-      array(
+      [
         '<br size="&{alert(0)}">',
         'alert',
         'Netscape 4.x javascript entities.',
-        array('br'),
-      ),
+        ['br'],
+      ],
       // DRUPAL-SA-2008-006: Invalid UTF-8, these only work as reflected XSS with
       // Internet Explorer 6.
-      array(
+      [
         "<p arg=\"\xe0\">\" style=\"background-image: url(javascript:alert(0));\"\xe0<p>",
         'style',
         'HTML filter -- invalid UTF-8.',
-        array('p'),
-      ),
-    );
+        ['p'],
+      ],
+    ];
     // @fixme This dataset currently fails under 5.4 because of
     //   https://www.drupal.org/node/1210798. Restore after its fixed.
     if (version_compare(PHP_VERSION, '5.4.0', '<')) {
-      $cases[] = array(
+      $cases[] = [
         '<img src=" &#14;  javascript:alert(0)">',
         'javascript',
         'HTML scheme clearing evasion -- spaces and metacharacters before scheme.',
-        array('img'),
-      );
+        ['img'],
+      ];
     }
     return $cases;
   }
@@ -468,11 +468,11 @@ public function testInvalidMultiByte($value, $expected, $message) {
    *     - The assertion message.
    */
   public function providerTestInvalidMultiByte() {
-    return array(
-      array("Foo\xC0barbaz", '', 'Xss::filter() accepted invalid sequence "Foo\xC0barbaz"'),
-      array("Fooÿñ", "Fooÿñ", 'Xss::filter() rejects valid sequence Fooÿñ"'),
-      array("\xc0aaa", '', 'HTML filter -- overlong UTF-8 sequences.'),
-    );
+    return [
+      ["Foo\xC0barbaz", '', 'Xss::filter() accepted invalid sequence "Foo\xC0barbaz"'],
+      ["Fooÿñ", "Fooÿñ", 'Xss::filter() rejects valid sequence Fooÿñ"'],
+      ["\xc0aaa", '', 'HTML filter -- overlong UTF-8 sequences.'],
+    ];
   }
 
   /**
@@ -498,38 +498,38 @@ public function testAttribute($value, $expected, $message, $allowed_tags = NULL)
    * Data provider for testFilterXssAdminNotNormalized().
    */
   public function providerTestAttributes() {
-    return array(
-      array(
+    return [
+      [
         '<img src="http://example.com/foo.jpg" title="Example: title" alt="Example: alt">',
         '<img src="http://example.com/foo.jpg" title="Example: title" alt="Example: alt">',
         'Image tag with alt and title attribute',
-        array('img')
-      ),
-      array(
+        ['img']
+      ],
+      [
         '<a href="https://www.drupal.org/" rel="dc:publisher">Drupal</a>',
         '<a href="https://www.drupal.org/" rel="dc:publisher">Drupal</a>',
         'Link tag with rel attribute',
-        array('a')
-      ),
-      array(
+        ['a']
+      ],
+      [
         '<span property="dc:subject">Drupal 8: The best release ever.</span>',
         '<span property="dc:subject">Drupal 8: The best release ever.</span>',
         'Span tag with property attribute',
-        array('span')
-      ),
-      array(
+        ['span']
+      ],
+      [
         '<img src="http://example.com/foo.jpg" data-caption="Drupal 8: The best release ever.">',
         '<img src="http://example.com/foo.jpg" data-caption="Drupal 8: The best release ever.">',
         'Image tag with data attribute',
-        array('img')
-      ),
-      array(
+        ['img']
+      ],
+      [
         '<a data-a2a-url="foo"></a>',
         '<a data-a2a-url="foo"></a>',
         'Link tag with numeric data attribute',
-        array('a')
-      ),
-    );
+        ['a']
+      ],
+    ];
   }
 
   /**
@@ -568,11 +568,11 @@ public function testFilterXssAdminNotNormalized($value, $expected, $message) {
    *     - The assertion message.
    */
   public function providerTestFilterXssAdminNotNormalized() {
-    return array(
+    return [
       // DRUPAL-SA-2008-044
-      array('<object />', 'object', 'Admin HTML filter -- should not allow object tag.'),
-      array('<script />', 'script', 'Admin HTML filter -- should not allow script tag.'),
-    );
+      ['<object />', 'object', 'Admin HTML filter -- should not allow object tag.'],
+      ['<script />', 'script', 'Admin HTML filter -- should not allow script tag.'],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php b/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php
index a393bfb27751f8bd2bda50ca7993768f30886b17..a93dd0981a78ffc52fc6f1517bbba2420d1bb194 100644
--- a/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php
+++ b/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php
@@ -41,7 +41,7 @@ public function testUuidIsUnique(UuidInterface $instance) {
    */
   public function providerUuidInstances() {
 
-    $instances = array();
+    $instances = [];
     $instances[][] = new Php();
 
     // If valid PECL extensions exists add to list.
@@ -83,15 +83,15 @@ public function testValidation($uuid, $is_valid, $message) {
    *   - Failure message.
    */
   public function providerTestValidation() {
-    return array(
+    return [
       // These valid UUIDs.
-      array('6ba7b810-9dad-11d1-80b4-00c04fd430c8', TRUE, 'Basic FQDN UUID did not validate'),
-      array('00000000-0000-0000-0000-000000000000', TRUE, 'Minimum UUID did not validate'),
-      array('ffffffff-ffff-ffff-ffff-ffffffffffff', TRUE, 'Maximum UUID did not validate'),
+      ['6ba7b810-9dad-11d1-80b4-00c04fd430c8', TRUE, 'Basic FQDN UUID did not validate'],
+      ['00000000-0000-0000-0000-000000000000', TRUE, 'Minimum UUID did not validate'],
+      ['ffffffff-ffff-ffff-ffff-ffffffffffff', TRUE, 'Maximum UUID did not validate'],
       // These are invalid UUIDs.
-      array('0ab26e6b-f074-4e44-9da-601205fa0e976', FALSE, 'Invalid format was validated'),
-      array('0ab26e6b-f074-4e44-9daf-1205fa0e9761f', FALSE, 'Invalid length was validated'),
-    );
+      ['0ab26e6b-f074-4e44-9da-601205fa0e976', FALSE, 'Invalid format was validated'],
+      ['0ab26e6b-f074-4e44-9daf-1205fa0e9761f', FALSE, 'Invalid length was validated'],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php b/core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php
index eee526059392fa67bb037efd79222b49abad843b..c2a1da7ea19c178bdf7c1d629ee98a55d3a30ea8 100644
--- a/core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php
@@ -100,25 +100,25 @@ protected function setUp() {
 
     $this->routeCollection = new RouteCollection();
     $this->routeCollection->add('test_route_1', new Route('/test-route-1'));
-    $this->routeCollection->add('test_route_2', new Route('/test-route-2', array(), array('_access' => 'TRUE')));
-    $this->routeCollection->add('test_route_3', new Route('/test-route-3', array(), array('_access' => 'FALSE')));
-    $this->routeCollection->add('test_route_4', new Route('/test-route-4/{value}', array(), array('_access' => 'TRUE')));
+    $this->routeCollection->add('test_route_2', new Route('/test-route-2', [], ['_access' => 'TRUE']));
+    $this->routeCollection->add('test_route_3', new Route('/test-route-3', [], ['_access' => 'FALSE']));
+    $this->routeCollection->add('test_route_4', new Route('/test-route-4/{value}', [], ['_access' => 'TRUE']));
 
     $this->routeProvider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
-    $map = array();
+    $map = [];
     foreach ($this->routeCollection->all() as $name => $route) {
-      $map[] = array($name, array(), $route);
+      $map[] = [$name, [], $route];
     }
-    $map[] = array('test_route_4', array('value' => 'example'), $this->routeCollection->get('test_route_4'));
+    $map[] = ['test_route_4', ['value' => 'example'], $this->routeCollection->get('test_route_4')];
     $this->routeProvider->expects($this->any())
       ->method('getRouteByName')
       ->will($this->returnValueMap($map));
 
-    $map = array();
-    $map[] = array('test_route_1', array(), '/test-route-1');
-    $map[] = array('test_route_2', array(), '/test-route-2');
-    $map[] = array('test_route_3', array(), '/test-route-3');
-    $map[] = array('test_route_4', array('value' => 'example'), '/test-route-4/example');
+    $map = [];
+    $map[] = ['test_route_1', [], '/test-route-1'];
+    $map[] = ['test_route_2', [], '/test-route-2'];
+    $map[] = ['test_route_3', [], '/test-route-3'];
+    $map[] = ['test_route_4', ['value' => 'example'], '/test-route-4/example'];
 
     $this->paramConverter = $this->getMock('Drupal\Core\ParamConverter\ParamConverterManagerInterface');
 
@@ -147,8 +147,8 @@ public function testSetChecks() {
     $this->checkProvider->setChecks($this->routeCollection);
 
     $this->assertEquals($this->routeCollection->get('test_route_1')->getOption('_access_checks'), NULL);
-    $this->assertEquals($this->routeCollection->get('test_route_2')->getOption('_access_checks'), array('test_access_default'));
-    $this->assertEquals($this->routeCollection->get('test_route_3')->getOption('_access_checks'), array('test_access_default'));
+    $this->assertEquals($this->routeCollection->get('test_route_2')->getOption('_access_checks'), ['test_access_default']);
+    $this->assertEquals($this->routeCollection->get('test_route_3')->getOption('_access_checks'), ['test_access_default']);
   }
 
   /**
@@ -163,8 +163,8 @@ public function testSetChecksWithDynamicAccessChecker() {
     $this->container->set('test_access', $access_check);
     $this->checkProvider->addCheckService('test_access', 'access');
 
-    $route = new Route('/test-path', array(), array('_foo' => '1', '_bar' => '1'));
-    $route2 = new Route('/test-path', array(), array('_foo' => '1', '_bar' => '2'));
+    $route = new Route('/test-path', [], ['_foo' => '1', '_bar' => '1']);
+    $route2 = new Route('/test-path', [], ['_foo' => '1', '_bar' => '2']);
     $collection = new RouteCollection();
     $collection->add('test_route', $route);
     $collection->add('test_route2', $route2);
@@ -178,7 +178,7 @@ public function testSetChecksWithDynamicAccessChecker() {
 
     $this->checkProvider->setChecks($collection);
     $this->assertEmpty($route->getOption('_access_checks'));
-    $this->assertEquals(array('test_access'), $route2->getOption('_access_checks'));
+    $this->assertEquals(['test_access'], $route2->getOption('_access_checks'));
   }
 
   /**
@@ -254,43 +254,43 @@ public function providerTestCheckConjunctions() {
     $access_deny = AccessResult::neutral();
     $access_kill = AccessResult::forbidden();
 
-    $access_configurations = array();
-    $access_configurations[] = array(
+    $access_configurations = [];
+    $access_configurations[] = [
       'name' => 'test_route_4',
       'condition_one' => 'TRUE',
       'condition_two' => 'FALSE',
       'expected' => $access_kill,
-    );
-    $access_configurations[] = array(
+    ];
+    $access_configurations[] = [
       'name' => 'test_route_5',
       'condition_one' => 'TRUE',
       'condition_two' => 'NULL',
       'expected' => $access_deny,
-    );
-    $access_configurations[] = array(
+    ];
+    $access_configurations[] = [
       'name' => 'test_route_6',
       'condition_one' => 'FALSE',
       'condition_two' => 'NULL',
       'expected' => $access_kill,
-    );
-    $access_configurations[] = array(
+    ];
+    $access_configurations[] = [
       'name' => 'test_route_7',
       'condition_one' => 'TRUE',
       'condition_two' => 'TRUE',
       'expected' => $access_allow,
-    );
-    $access_configurations[] = array(
+    ];
+    $access_configurations[] = [
       'name' => 'test_route_8',
       'condition_one' => 'FALSE',
       'condition_two' => 'FALSE',
       'expected' => $access_kill,
-    );
-    $access_configurations[] = array(
+    ];
+    $access_configurations[] = [
       'name' => 'test_route_9',
       'condition_one' => 'NULL',
       'condition_two' => 'NULL',
       'expected' => $access_deny,
-    );
+    ];
 
     return $access_configurations;
   }
@@ -304,21 +304,21 @@ public function testCheckConjunctions($name, $condition_one, $condition_two, $ex
     $this->setupAccessChecker();
     $access_check = new DefinedTestAccessCheck();
     $this->container->register('test_access_defined', $access_check);
-    $this->checkProvider->addCheckService('test_access_defined', 'access', array('_test_access'));
+    $this->checkProvider->addCheckService('test_access_defined', 'access', ['_test_access']);
 
     $route_collection = new RouteCollection();
     // Setup a test route for each access configuration.
-    $requirements = array(
+    $requirements = [
       '_access' => $condition_one,
       '_test_access' => $condition_two,
-    );
-    $route = new Route($name, array(), $requirements);
+    ];
+    $route = new Route($name, [], $requirements);
     $route_collection->add($name, $route);
 
     $this->checkProvider->setChecks($route_collection);
     $this->setupAccessArgumentsResolverFactory();
 
-    $route_match = new RouteMatch($name, $route, array(), array());
+    $route_match = new RouteMatch($name, $route, [], []);
     $this->assertEquals($expected_access->isAllowed(), $this->accessManager->check($route_match, $this->account));
     $this->assertEquals($expected_access, $this->accessManager->check($route_match, $this->account, NULL, TRUE));
   }
@@ -335,27 +335,27 @@ public function testCheckNamedRoute() {
 
     $this->paramConverter->expects($this->at(0))
       ->method('convert')
-      ->with(array(RouteObjectInterface::ROUTE_NAME => 'test_route_2', RouteObjectInterface::ROUTE_OBJECT => $this->routeCollection->get('test_route_2')))
-      ->will($this->returnValue(array()));
+      ->with([RouteObjectInterface::ROUTE_NAME => 'test_route_2', RouteObjectInterface::ROUTE_OBJECT => $this->routeCollection->get('test_route_2')])
+      ->will($this->returnValue([]));
     $this->paramConverter->expects($this->at(1))
       ->method('convert')
-      ->with(array(RouteObjectInterface::ROUTE_NAME => 'test_route_2', RouteObjectInterface::ROUTE_OBJECT => $this->routeCollection->get('test_route_2')))
-      ->will($this->returnValue(array()));
+      ->with([RouteObjectInterface::ROUTE_NAME => 'test_route_2', RouteObjectInterface::ROUTE_OBJECT => $this->routeCollection->get('test_route_2')])
+      ->will($this->returnValue([]));
 
     $this->paramConverter->expects($this->at(2))
       ->method('convert')
-      ->with(array('value' => 'example', RouteObjectInterface::ROUTE_NAME => 'test_route_4', RouteObjectInterface::ROUTE_OBJECT => $this->routeCollection->get('test_route_4')))
-      ->will($this->returnValue(array('value' => 'example')));
+      ->with(['value' => 'example', RouteObjectInterface::ROUTE_NAME => 'test_route_4', RouteObjectInterface::ROUTE_OBJECT => $this->routeCollection->get('test_route_4')])
+      ->will($this->returnValue(['value' => 'example']));
     $this->paramConverter->expects($this->at(3))
       ->method('convert')
-      ->with(array('value' => 'example', RouteObjectInterface::ROUTE_NAME => 'test_route_4', RouteObjectInterface::ROUTE_OBJECT => $this->routeCollection->get('test_route_4')))
-      ->will($this->returnValue(array('value' => 'example')));
+      ->with(['value' => 'example', RouteObjectInterface::ROUTE_NAME => 'test_route_4', RouteObjectInterface::ROUTE_OBJECT => $this->routeCollection->get('test_route_4')])
+      ->will($this->returnValue(['value' => 'example']));
 
     // Tests the access with routes with parameters without given request.
-    $this->assertEquals(TRUE, $this->accessManager->checkNamedRoute('test_route_2', array(), $this->account));
-    $this->assertEquals(AccessResult::allowed(), $this->accessManager->checkNamedRoute('test_route_2', array(), $this->account, TRUE));
-    $this->assertEquals(TRUE, $this->accessManager->checkNamedRoute('test_route_4', array('value' => 'example'), $this->account));
-    $this->assertEquals(AccessResult::allowed(), $this->accessManager->checkNamedRoute('test_route_4', array('value' => 'example'), $this->account, TRUE));
+    $this->assertEquals(TRUE, $this->accessManager->checkNamedRoute('test_route_2', [], $this->account));
+    $this->assertEquals(AccessResult::allowed(), $this->accessManager->checkNamedRoute('test_route_2', [], $this->account, TRUE));
+    $this->assertEquals(TRUE, $this->accessManager->checkNamedRoute('test_route_4', ['value' => 'example'], $this->account));
+    $this->assertEquals(AccessResult::allowed(), $this->accessManager->checkNamedRoute('test_route_4', ['value' => 'example'], $this->account, TRUE));
   }
 
   /**
@@ -365,23 +365,23 @@ public function testCheckNamedRoute() {
    */
   public function testCheckNamedRouteWithUpcastedValues() {
     $this->routeCollection = new RouteCollection();
-    $route = new Route('/test-route-1/{value}', array(), array('_test_access' => 'TRUE'));
+    $route = new Route('/test-route-1/{value}', [], ['_test_access' => 'TRUE']);
     $this->routeCollection->add('test_route_1', $route);
 
     $this->routeProvider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
     $this->routeProvider->expects($this->any())
       ->method('getRouteByName')
-      ->with('test_route_1', array('value' => 'example'))
+      ->with('test_route_1', ['value' => 'example'])
       ->will($this->returnValue($route));
 
-    $map = array();
-    $map[] = array('test_route_1', array('value' => 'example'), '/test-route-1/example');
+    $map = [];
+    $map[] = ['test_route_1', ['value' => 'example'], '/test-route-1/example'];
 
     $this->paramConverter = $this->getMock('Drupal\Core\ParamConverter\ParamConverterManagerInterface');
     $this->paramConverter->expects($this->atLeastOnce())
       ->method('convert')
-      ->with(array('value' => 'example', RouteObjectInterface::ROUTE_NAME => 'test_route_1', RouteObjectInterface::ROUTE_OBJECT => $route))
-      ->will($this->returnValue(array('value' => 'upcasted_value')));
+      ->with(['value' => 'example', RouteObjectInterface::ROUTE_NAME => 'test_route_1', RouteObjectInterface::ROUTE_OBJECT => $route])
+      ->will($this->returnValue(['value' => 'upcasted_value']));
 
     $this->setupAccessArgumentsResolverFactory($this->exactly(2))
       ->with($this->callback(function ($route_match) {
@@ -403,8 +403,8 @@ public function testCheckNamedRouteWithUpcastedValues() {
     $this->checkProvider->addCheckService('test_access', 'access');
     $this->checkProvider->setChecks($this->routeCollection);
 
-    $this->assertEquals(FALSE, $this->accessManager->checkNamedRoute('test_route_1', array('value' => 'example'), $this->account));
-    $this->assertEquals(AccessResult::forbidden(), $this->accessManager->checkNamedRoute('test_route_1', array('value' => 'example'), $this->account, TRUE));
+    $this->assertEquals(FALSE, $this->accessManager->checkNamedRoute('test_route_1', ['value' => 'example'], $this->account));
+    $this->assertEquals(AccessResult::forbidden(), $this->accessManager->checkNamedRoute('test_route_1', ['value' => 'example'], $this->account, TRUE));
   }
 
   /**
@@ -414,23 +414,23 @@ public function testCheckNamedRouteWithUpcastedValues() {
    */
   public function testCheckNamedRouteWithDefaultValue() {
     $this->routeCollection = new RouteCollection();
-    $route = new Route('/test-route-1/{value}', array('value' => 'example'), array('_test_access' => 'TRUE'));
+    $route = new Route('/test-route-1/{value}', ['value' => 'example'], ['_test_access' => 'TRUE']);
     $this->routeCollection->add('test_route_1', $route);
 
     $this->routeProvider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
     $this->routeProvider->expects($this->any())
       ->method('getRouteByName')
-      ->with('test_route_1', array())
+      ->with('test_route_1', [])
       ->will($this->returnValue($route));
 
-    $map = array();
-    $map[] = array('test_route_1', array('value' => 'example'), '/test-route-1/example');
+    $map = [];
+    $map[] = ['test_route_1', ['value' => 'example'], '/test-route-1/example'];
 
     $this->paramConverter = $this->getMock('Drupal\Core\ParamConverter\ParamConverterManagerInterface');
     $this->paramConverter->expects($this->atLeastOnce())
       ->method('convert')
-      ->with(array('value' => 'example', RouteObjectInterface::ROUTE_NAME => 'test_route_1', RouteObjectInterface::ROUTE_OBJECT => $route))
-      ->will($this->returnValue(array('value' => 'upcasted_value')));
+      ->with(['value' => 'example', RouteObjectInterface::ROUTE_NAME => 'test_route_1', RouteObjectInterface::ROUTE_OBJECT => $route])
+      ->will($this->returnValue(['value' => 'upcasted_value']));
 
     $this->setupAccessArgumentsResolverFactory($this->exactly(2))
       ->with($this->callback(function ($route_match) {
@@ -452,8 +452,8 @@ public function testCheckNamedRouteWithDefaultValue() {
     $this->checkProvider->addCheckService('test_access', 'access');
     $this->checkProvider->setChecks($this->routeCollection);
 
-    $this->assertEquals(FALSE, $this->accessManager->checkNamedRoute('test_route_1', array(), $this->account));
-    $this->assertEquals(AccessResult::forbidden(), $this->accessManager->checkNamedRoute('test_route_1', array(), $this->account, TRUE));
+    $this->assertEquals(FALSE, $this->accessManager->checkNamedRoute('test_route_1', [], $this->account));
+    $this->assertEquals(AccessResult::forbidden(), $this->accessManager->checkNamedRoute('test_route_1', [], $this->account, TRUE));
   }
 
   /**
@@ -466,8 +466,8 @@ public function testCheckNamedRouteWithNonExistingRoute() {
 
     $this->setupAccessChecker();
 
-    $this->assertEquals(FALSE, $this->accessManager->checkNamedRoute('test_route_1', array(), $this->account), 'A non existing route lead to access.');
-    $this->assertEquals(AccessResult::forbidden()->addCacheTags(['config:core.extension']), $this->accessManager->checkNamedRoute('test_route_1', array(), $this->account, TRUE), 'A non existing route lead to access.');
+    $this->assertEquals(FALSE, $this->accessManager->checkNamedRoute('test_route_1', [], $this->account), 'A non existing route lead to access.');
+    $this->assertEquals(AccessResult::forbidden()->addCacheTags(['config:core.extension']), $this->accessManager->checkNamedRoute('test_route_1', [], $this->account, TRUE), 'A non existing route lead to access.');
   }
 
   /**
@@ -481,15 +481,15 @@ public function testCheckException($return_value) {
     $route_provider = $this->getMock('Drupal\Core\Routing\RouteProviderInterface');
 
     // Setup a test route for each access configuration.
-    $requirements = array(
+    $requirements = [
       '_test_incorrect_value' => 'TRUE',
-    );
-    $options = array(
-      '_access_checks' => array(
+    ];
+    $options = [
+      '_access_checks' => [
         'test_incorrect_value',
-      ),
-    );
-    $route = new Route('', array(), $requirements, $options);
+      ],
+    ];
+    $route = new Route('', [], $requirements, $options);
 
     $route_provider->expects($this->any())
       ->method('getRouteByName')
@@ -498,7 +498,7 @@ public function testCheckException($return_value) {
     $this->paramConverter = $this->getMock('Drupal\Core\ParamConverter\ParamConverterManagerInterface');
     $this->paramConverter->expects($this->any())
       ->method('convert')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->setupAccessArgumentsResolverFactory();
 
@@ -515,7 +515,7 @@ public function testCheckException($return_value) {
     $this->checkProvider->setContainer($container);
     $this->checkProvider->addCheckService('test_incorrect_value', 'access');
 
-    $access_manager->checkNamedRoute('test_incorrect_value', array(), $this->account);
+    $access_manager->checkNamedRoute('test_incorrect_value', [], $this->account);
   }
 
   /**
@@ -524,12 +524,12 @@ public function testCheckException($return_value) {
    * @return array
    */
   public function providerCheckException() {
-    return array(
-      array(array(1)),
-      array('string'),
-      array(0),
-      array(1),
-    );
+    return [
+      [[1]],
+      ['string'],
+      [0],
+      [1],
+    ];
   }
 
   /**
@@ -538,7 +538,7 @@ public function providerCheckException() {
   protected function setupAccessChecker() {
     $access_check = new DefaultAccessCheck();
     $this->container->register('test_access_default', $access_check);
-    $this->checkProvider->addCheckService('test_access_default', 'access', array('_access'));
+    $this->checkProvider->addCheckService('test_access_default', 'access', ['_access']);
   }
 
   /**
@@ -555,7 +555,7 @@ protected function setupAccessArgumentsResolverFactory($constraint = NULL) {
         $resolver->expects($this->any())
           ->method('getArguments')
           ->will($this->returnCallback(function ($callable) use ($route_match) {
-            return array($route_match->getRouteObject());
+            return [$route_match->getRouteObject()];
           }));
         return $resolver;
       }));
diff --git a/core/tests/Drupal/Tests/Core/Access/AccessResultTest.php b/core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
index c1b6c65fb6abdc1d5d915bc513a333cce4a00afe..647da61255a8ab58964741c955fcf90ea4e151b7 100644
--- a/core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
@@ -397,7 +397,7 @@ public function testCacheContexts() {
     $verify($access, ['bar', 'foo']);
 
     // ::cachePerPermissions() convenience method.
-    $contexts = array('user.permissions');
+    $contexts = ['user.permissions'];
     $a = AccessResult::neutral()->addCacheContexts($contexts);
     $verify($a, $contexts);
     $b = AccessResult::neutral()->cachePerPermissions();
@@ -405,7 +405,7 @@ public function testCacheContexts() {
     $this->assertEquals($a, $b);
 
     // ::cachePerUser() convenience method.
-    $contexts = array('user');
+    $contexts = ['user'];
     $a = AccessResult::neutral()->addCacheContexts($contexts);
     $verify($a, $contexts);
     $b = AccessResult::neutral()->cachePerUser();
@@ -413,7 +413,7 @@ public function testCacheContexts() {
     $this->assertEquals($a, $b);
 
     // Both.
-    $contexts = array('user', 'user.permissions');
+    $contexts = ['user', 'user.permissions'];
     $a = AccessResult::neutral()->addCacheContexts($contexts);
     $verify($a, $contexts);
     $b = AccessResult::neutral()->cachePerPermissions()->cachePerUser();
@@ -429,7 +429,7 @@ public function testCacheContexts() {
       ->method('hasPermission')
       ->with('may herd llamas')
       ->will($this->returnValue(FALSE));
-    $contexts = array('user.permissions');
+    $contexts = ['user.permissions'];
 
     // Verify the object when using the ::allowedIfHasPermission() convenience
     // static method.
@@ -480,14 +480,14 @@ public function testCacheTags() {
     $node = $this->getMock('\Drupal\node\NodeInterface');
     $node->expects($this->any())
       ->method('getCacheTags')
-      ->will($this->returnValue(array('node:20011988')));
+      ->will($this->returnValue(['node:20011988']));
     $node->expects($this->any())
       ->method('getCacheMaxAge')
       ->willReturn(600);
     $node->expects($this->any())
       ->method('getCacheContexts')
       ->willReturn(['user']);
-    $tags = array('node:20011988');
+    $tags = ['node:20011988'];
     $a = AccessResult::neutral()->addCacheTags($tags);
     $verify($a, $tags);
     $b = AccessResult::neutral()->addCacheableDependency($node);
diff --git a/core/tests/Drupal/Tests/Core/Access/CsrfAccessCheckTest.php b/core/tests/Drupal/Tests/Core/Access/CsrfAccessCheckTest.php
index b88373cade31267e786f840f31ac8b6e743729fe..edbbfba2153b2c2b1c9f68016afdbb5fb934ee15 100644
--- a/core/tests/Drupal/Tests/Core/Access/CsrfAccessCheckTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/CsrfAccessCheckTest.php
@@ -56,9 +56,9 @@ public function testAccessTokenPass() {
 
     $this->routeMatch->expects($this->once())
       ->method('getRawParameters')
-      ->will($this->returnValue(array('node' => 42)));
+      ->will($this->returnValue(['node' => 42]));
 
-    $route = new Route('/test-path/{node}', array(), array('_csrf_token' => 'TRUE'));
+    $route = new Route('/test-path/{node}', [], ['_csrf_token' => 'TRUE']);
     $request = Request::create('/test-path/42?token=test_query');
 
     $this->assertEquals(AccessResult::allowed()->setCacheMaxAge(0), $this->accessCheck->access($route, $request, $this->routeMatch));
@@ -75,9 +75,9 @@ public function testCsrfTokenInvalid() {
 
     $this->routeMatch->expects($this->once())
       ->method('getRawParameters')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
-    $route = new Route('/test-path', array(), array('_csrf_token' => 'TRUE'));
+    $route = new Route('/test-path', [], ['_csrf_token' => 'TRUE']);
     $request = Request::create('/test-path?token=test_query');
 
     $this->assertEquals(AccessResult::forbidden("'csrf_token' URL query argument is invalid.")->setCacheMaxAge(0), $this->accessCheck->access($route, $request, $this->routeMatch));
@@ -94,9 +94,9 @@ public function testCsrfTokenMissing() {
 
     $this->routeMatch->expects($this->once())
       ->method('getRawParameters')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
-    $route = new Route('/test-path', array(), array('_csrf_token' => 'TRUE'));
+    $route = new Route('/test-path', [], ['_csrf_token' => 'TRUE']);
     $request = Request::create('/test-path');
     $this->assertEquals(AccessResult::forbidden("'csrf_token' URL query argument is missing.")->setCacheMaxAge(0), $this->accessCheck->access($route, $request, $this->routeMatch));
   }
diff --git a/core/tests/Drupal/Tests/Core/Access/CsrfTokenGeneratorTest.php b/core/tests/Drupal/Tests/Core/Access/CsrfTokenGeneratorTest.php
index 6eabd37cb51e59ab8cf1e990eabe876f71ccd3d3..cc4691d74cafb75852e74a138f9671f9b14346ef 100644
--- a/core/tests/Drupal/Tests/Core/Access/CsrfTokenGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/CsrfTokenGeneratorTest.php
@@ -44,16 +44,16 @@ protected function setUp() {
 
     $this->privateKey = $this->getMockBuilder('Drupal\Core\PrivateKey')
       ->disableOriginalConstructor()
-      ->setMethods(array('get'))
+      ->setMethods(['get'])
       ->getMock();
 
     $this->sessionMetadata = $this->getMockBuilder('Drupal\Core\Session\MetadataBag')
       ->disableOriginalConstructor()
       ->getMock();
 
-    $settings = array(
+    $settings = [
       'hash_salt' => $this->randomMachineName(),
-    );
+    ];
 
     new Settings($settings);
 
@@ -154,11 +154,11 @@ public function testValidateParameterTypes($token, $value) {
    *   An array of data used by the test.
    */
   public function providerTestValidateParameterTypes() {
-    return array(
-      array(array(), ''),
-      array(TRUE, 'foo'),
-      array(0, 'foo'),
-    );
+    return [
+      [[], ''],
+      [TRUE, 'foo'],
+      [0, 'foo'],
+    ];
   }
 
   /**
@@ -186,12 +186,12 @@ public function testInvalidParameterTypes($token, $value = '') {
    *   An array of data used by the test.
    */
   public function providerTestInvalidParameterTypes() {
-    return array(
-      array(NULL, new \stdClass()),
-      array(0, array()),
-      array('', array()),
-      array(array(), array()),
-    );
+    return [
+      [NULL, new \stdClass()],
+      [0, []],
+      ['', []],
+      [[], []],
+    ];
   }
 
   /**
@@ -202,7 +202,7 @@ public function providerTestInvalidParameterTypes() {
    */
   public function testGetWithNoHashSalt() {
     // Update settings with no hash salt.
-    new Settings(array());
+    new Settings([]);
     $generator = new CsrfTokenGenerator($this->privateKey, $this->sessionMetadata);
     $generator->get();
   }
diff --git a/core/tests/Drupal/Tests/Core/Access/CustomAccessCheckTest.php b/core/tests/Drupal/Tests/Core/Access/CustomAccessCheckTest.php
index 36d330de37d28753c8489173c3c8a3626611057c..9f0c2c9db40353650a29208d1290cb85dd93340d 100644
--- a/core/tests/Drupal/Tests/Core/Access/CustomAccessCheckTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/CustomAccessCheckTest.php
@@ -59,12 +59,12 @@ public function testAccess() {
     $this->controllerResolver->expects($this->at(0))
       ->method('getControllerFromDefinition')
       ->with('\Drupal\Tests\Core\Access\TestController::accessDeny')
-      ->will($this->returnValue(array(new TestController(), 'accessDeny')));
+      ->will($this->returnValue([new TestController(), 'accessDeny']));
 
     $resolver0 = $this->getMock('Drupal\Component\Utility\ArgumentsResolverInterface');
     $resolver0->expects($this->once())
       ->method('getArguments')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->argumentsResolverFactory->expects($this->at(0))
       ->method('getArgumentsResolver')
       ->will($this->returnValue($resolver0));
@@ -72,12 +72,12 @@ public function testAccess() {
     $this->controllerResolver->expects($this->at(1))
       ->method('getControllerFromDefinition')
       ->with('\Drupal\Tests\Core\Access\TestController::accessAllow')
-      ->will($this->returnValue(array(new TestController(), 'accessAllow')));
+      ->will($this->returnValue([new TestController(), 'accessAllow']));
 
     $resolver1 = $this->getMock('Drupal\Component\Utility\ArgumentsResolverInterface');
     $resolver1->expects($this->once())
       ->method('getArguments')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->argumentsResolverFactory->expects($this->at(1))
       ->method('getArgumentsResolver')
       ->will($this->returnValue($resolver1));
@@ -85,24 +85,24 @@ public function testAccess() {
     $this->controllerResolver->expects($this->at(2))
       ->method('getControllerFromDefinition')
       ->with('\Drupal\Tests\Core\Access\TestController::accessParameter')
-      ->will($this->returnValue(array(new TestController(), 'accessParameter')));
+      ->will($this->returnValue([new TestController(), 'accessParameter']));
 
     $resolver2 = $this->getMock('Drupal\Component\Utility\ArgumentsResolverInterface');
     $resolver2->expects($this->once())
       ->method('getArguments')
-      ->will($this->returnValue(array('parameter' => 'TRUE')));
+      ->will($this->returnValue(['parameter' => 'TRUE']));
     $this->argumentsResolverFactory->expects($this->at(2))
       ->method('getArgumentsResolver')
       ->will($this->returnValue($resolver2));
 
-    $route = new Route('/test-route', array(), array('_custom_access' => '\Drupal\Tests\Core\Access\TestController::accessDeny'));
+    $route = new Route('/test-route', [], ['_custom_access' => '\Drupal\Tests\Core\Access\TestController::accessDeny']);
     $account = $this->getMock('Drupal\Core\Session\AccountInterface');
     $this->assertEquals(AccessResult::neutral(), $this->accessChecker->access($route, $route_match, $account));
 
-    $route = new Route('/test-route', array(), array('_custom_access' => '\Drupal\Tests\Core\Access\TestController::accessAllow'));
+    $route = new Route('/test-route', [], ['_custom_access' => '\Drupal\Tests\Core\Access\TestController::accessAllow']);
     $this->assertEquals(AccessResult::allowed(), $this->accessChecker->access($route, $route_match, $account));
 
-    $route = new Route('/test-route', array('parameter' => 'TRUE'), array('_custom_access' => '\Drupal\Tests\Core\Access\TestController::accessParameter'));
+    $route = new Route('/test-route', ['parameter' => 'TRUE'], ['_custom_access' => '\Drupal\Tests\Core\Access\TestController::accessParameter']);
     $this->assertEquals(AccessResult::allowed(), $this->accessChecker->access($route, $route_match, $account));
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Access/DefaultAccessCheckTest.php b/core/tests/Drupal/Tests/Core/Access/DefaultAccessCheckTest.php
index ad447f8b161ceb3968655d1169b3bdc5f2da0c9a..e46585844f88544c71d1143236e5fed7ee0ee544 100644
--- a/core/tests/Drupal/Tests/Core/Access/DefaultAccessCheckTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/DefaultAccessCheckTest.php
@@ -42,15 +42,15 @@ protected function setUp() {
    * Test the access method.
    */
   public function testAccess() {
-    $request = new Request(array());
+    $request = new Request([]);
 
-    $route = new Route('/test-route', array(), array('_access' => 'NULL'));
+    $route = new Route('/test-route', [], ['_access' => 'NULL']);
     $this->assertEquals(AccessResult::neutral(), $this->accessChecker->access($route, $request, $this->account));
 
-    $route = new Route('/test-route', array(), array('_access' => 'FALSE'));
+    $route = new Route('/test-route', [], ['_access' => 'FALSE']);
     $this->assertEquals(AccessResult::forbidden(), $this->accessChecker->access($route, $request, $this->account));
 
-    $route = new Route('/test-route', array(), array('_access' => 'TRUE'));
+    $route = new Route('/test-route', [], ['_access' => 'TRUE']);
     $this->assertEquals(AccessResult::allowed(), $this->accessChecker->access($route, $request, $this->account));
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Access/RouteProcessorCsrfTest.php b/core/tests/Drupal/Tests/Core/Access/RouteProcessorCsrfTest.php
index 1a36c3d7689806bdc1fc38502830441677c72498..2fef35f3d577068c53b7111345f0e1d9600fcada 100644
--- a/core/tests/Drupal/Tests/Core/Access/RouteProcessorCsrfTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/RouteProcessorCsrfTest.php
@@ -44,7 +44,7 @@ public function testProcessOutboundNoRequirement() {
       ->method('get');
 
     $route = new Route('/test-path');
-    $parameters = array();
+    $parameters = [];
 
     $bubbleable_metadata = new BubbleableMetadata();
     $this->processor->processOutbound('test', $route, $parameters, $bubbleable_metadata);
@@ -59,8 +59,8 @@ public function testProcessOutboundNoRequirement() {
    * Tests the processOutbound() method with a _csrf_token route requirement.
    */
   public function testProcessOutbound() {
-    $route = new Route('/test-path', array(), array('_csrf_token' => 'TRUE'));
-    $parameters = array();
+    $route = new Route('/test-path', [], ['_csrf_token' => 'TRUE']);
+    $parameters = [];
 
     $bubbleable_metadata = new BubbleableMetadata();
     $this->processor->processOutbound('test', $route, $parameters, $bubbleable_metadata);
@@ -81,8 +81,8 @@ public function testProcessOutbound() {
    * Tests the processOutbound() method with a dynamic path and one replacement.
    */
   public function testProcessOutboundDynamicOne() {
-    $route = new Route('/test-path/{slug}', array(), array('_csrf_token' => 'TRUE'));
-    $parameters = array('slug' => 100);
+    $route = new Route('/test-path/{slug}', [], ['_csrf_token' => 'TRUE']);
+    $parameters = ['slug' => 100];
 
     $bubbleable_metadata = new BubbleableMetadata();
     $this->processor->processOutbound('test', $route, $parameters, $bubbleable_metadata);
@@ -100,8 +100,8 @@ public function testProcessOutboundDynamicOne() {
    * Tests the processOutbound() method with two parameter replacements.
    */
   public function testProcessOutboundDynamicTwo() {
-    $route = new Route('{slug_1}/test-path/{slug_2}', array(), array('_csrf_token' => 'TRUE'));
-    $parameters = array('slug_1' => 100, 'slug_2' => 'test');
+    $route = new Route('{slug_1}/test-path/{slug_2}', [], ['_csrf_token' => 'TRUE']);
+    $parameters = ['slug_1' => 100, 'slug_2' => 'test'];
 
     $bubbleable_metadata = new BubbleableMetadata();
     $this->processor->processOutbound('test', $route, $parameters, $bubbleable_metadata);
diff --git a/core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php b/core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php
index a076e545f0c9738a4661ba6919a55bc67cbbedb5..215d9224d914d3e02efbe714a67c87267d9fb6c3 100644
--- a/core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php
+++ b/core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php
@@ -38,10 +38,10 @@ class AjaxCommandsTest extends UnitTestCase {
   public function testAddCssCommand() {
     $command = new AddCssCommand('p{ text-decoration:blink; }');
 
-    $expected = array(
+    $expected = [
       'command' => 'add_css',
       'data' => 'p{ text-decoration:blink; }',
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -50,15 +50,15 @@ public function testAddCssCommand() {
    * @covers \Drupal\Core\Ajax\AfterCommand
    */
   public function testAfterCommand() {
-    $command = new AfterCommand('#page-title', '<p>New Text!</p>', array('my-setting' => 'setting'));
+    $command = new AfterCommand('#page-title', '<p>New Text!</p>', ['my-setting' => 'setting']);
 
-    $expected = array(
+    $expected = [
       'command' => 'insert',
       'method' => 'after',
       'selector' => '#page-title',
       'data' => '<p>New Text!</p>',
-      'settings' => array('my-setting' => 'setting'),
-    );
+      'settings' => ['my-setting' => 'setting'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -68,10 +68,10 @@ public function testAfterCommand() {
    */
   public function testAlertCommand() {
     $command = new AlertCommand('Set condition 1 throughout the ship!');
-    $expected = array(
+    $expected = [
       'command' => 'alert',
       'text' => 'Set condition 1 throughout the ship!',
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -80,15 +80,15 @@ public function testAlertCommand() {
    * @covers \Drupal\Core\Ajax\AppendCommand
    */
   public function testAppendCommand() {
-    $command = new AppendCommand('#page-title', '<p>New Text!</p>', array('my-setting' => 'setting'));
+    $command = new AppendCommand('#page-title', '<p>New Text!</p>', ['my-setting' => 'setting']);
 
-    $expected = array(
+    $expected = [
       'command' => 'insert',
       'method' => 'append',
       'selector' => '#page-title',
       'data' => '<p>New Text!</p>',
-      'settings' => array('my-setting' => 'setting'),
-    );
+      'settings' => ['my-setting' => 'setting'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -97,15 +97,15 @@ public function testAppendCommand() {
    * @covers \Drupal\Core\Ajax\BeforeCommand
    */
   public function testBeforeCommand() {
-    $command = new BeforeCommand('#page-title', '<p>New Text!</p>', array('my-setting' => 'setting'));
+    $command = new BeforeCommand('#page-title', '<p>New Text!</p>', ['my-setting' => 'setting']);
 
-    $expected = array(
+    $expected = [
       'command' => 'insert',
       'method' => 'before',
       'selector' => '#page-title',
       'data' => '<p>New Text!</p>',
-      'settings' => array('my-setting' => 'setting'),
-    );
+      'settings' => ['my-setting' => 'setting'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -116,11 +116,11 @@ public function testBeforeCommand() {
   public function testChangedCommand() {
     $command = new ChangedCommand('#page-title', '#page-title-changed');
 
-    $expected = array(
+    $expected = [
       'command' => 'changed',
       'selector' => '#page-title',
       'asterisk' => '#page-title-changed',
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -129,18 +129,18 @@ public function testChangedCommand() {
    * @covers \Drupal\Core\Ajax\CssCommand
    */
   public function testCssCommand() {
-    $command = new CssCommand('#page-title', array('text-decoration' => 'blink'));
+    $command = new CssCommand('#page-title', ['text-decoration' => 'blink']);
     $command->setProperty('font-size', '40px')->setProperty('font-weight', 'bold');
 
-    $expected = array(
+    $expected = [
       'command' => 'css',
       'selector' => '#page-title',
-      'argument' => array(
+      'argument' => [
         'text-decoration' => 'blink',
         'font-size' => '40px',
         'font-weight' => 'bold',
-      ),
-    );
+      ],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -149,14 +149,14 @@ public function testCssCommand() {
    * @covers \Drupal\Core\Ajax\DataCommand
    */
   public function testDataCommand() {
-    $command = new DataCommand('#page-title', 'my-data', array('key' => 'value'));
+    $command = new DataCommand('#page-title', 'my-data', ['key' => 'value']);
 
-    $expected = array(
+    $expected = [
       'command' => 'data',
       'selector' => '#page-title',
       'name' => 'my-data',
-      'value' => array('key' => 'value'),
-    );
+      'value' => ['key' => 'value'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -165,15 +165,15 @@ public function testDataCommand() {
    * @covers \Drupal\Core\Ajax\HtmlCommand
    */
   public function testHtmlCommand() {
-    $command = new HtmlCommand('#page-title', '<p>New Text!</p>', array('my-setting' => 'setting'));
+    $command = new HtmlCommand('#page-title', '<p>New Text!</p>', ['my-setting' => 'setting']);
 
-    $expected = array(
+    $expected = [
       'command' => 'insert',
       'method' => 'html',
       'selector' => '#page-title',
       'data' => '<p>New Text!</p>',
-      'settings' => array('my-setting' => 'setting'),
-    );
+      'settings' => ['my-setting' => 'setting'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -182,15 +182,15 @@ public function testHtmlCommand() {
    * @covers \Drupal\Core\Ajax\InsertCommand
    */
   public function testInsertCommand() {
-    $command = new InsertCommand('#page-title', '<p>New Text!</p>', array('my-setting' => 'setting'));
+    $command = new InsertCommand('#page-title', '<p>New Text!</p>', ['my-setting' => 'setting']);
 
-    $expected = array(
+    $expected = [
       'command' => 'insert',
       'method' => NULL,
       'selector' => '#page-title',
       'data' => '<p>New Text!</p>',
-      'settings' => array('my-setting' => 'setting'),
-    );
+      'settings' => ['my-setting' => 'setting'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -199,14 +199,14 @@ public function testInsertCommand() {
    * @covers \Drupal\Core\Ajax\InvokeCommand
    */
   public function testInvokeCommand() {
-    $command = new InvokeCommand('#page-title', 'myMethod', array('var1', 'var2'));
+    $command = new InvokeCommand('#page-title', 'myMethod', ['var1', 'var2']);
 
-    $expected = array(
+    $expected = [
       'command' => 'invoke',
       'selector' => '#page-title',
       'method' => 'myMethod',
-      'args' => array('var1', 'var2'),
-    );
+      'args' => ['var1', 'var2'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -215,15 +215,15 @@ public function testInvokeCommand() {
    * @covers \Drupal\Core\Ajax\PrependCommand
    */
   public function testPrependCommand() {
-    $command = new PrependCommand('#page-title', '<p>New Text!</p>', array('my-setting' => 'setting'));
+    $command = new PrependCommand('#page-title', '<p>New Text!</p>', ['my-setting' => 'setting']);
 
-    $expected = array(
+    $expected = [
       'command' => 'insert',
       'method' => 'prepend',
       'selector' => '#page-title',
       'data' => '<p>New Text!</p>',
-      'settings' => array('my-setting' => 'setting'),
-    );
+      'settings' => ['my-setting' => 'setting'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -234,10 +234,10 @@ public function testPrependCommand() {
   public function testRemoveCommand() {
     $command = new RemoveCommand('#page-title');
 
-    $expected = array(
+    $expected = [
       'command' => 'remove',
       'selector' => '#page-title',
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -246,15 +246,15 @@ public function testRemoveCommand() {
    * @covers \Drupal\Core\Ajax\ReplaceCommand
    */
   public function testReplaceCommand() {
-    $command = new ReplaceCommand('#page-title', '<p>New Text!</p>', array('my-setting' => 'setting'));
+    $command = new ReplaceCommand('#page-title', '<p>New Text!</p>', ['my-setting' => 'setting']);
 
-    $expected = array(
+    $expected = [
       'command' => 'insert',
       'method' => 'replaceWith',
       'selector' => '#page-title',
       'data' => '<p>New Text!</p>',
-      'settings' => array('my-setting' => 'setting'),
-    );
+      'settings' => ['my-setting' => 'setting'],
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -265,10 +265,10 @@ public function testReplaceCommand() {
   public function testRestripeCommand() {
     $command = new RestripeCommand('#page-title');
 
-    $expected = array(
+    $expected = [
       'command' => 'restripe',
       'selector' => '#page-title',
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -277,13 +277,13 @@ public function testRestripeCommand() {
    * @covers \Drupal\Core\Ajax\SettingsCommand
    */
   public function testSettingsCommand() {
-    $command = new SettingsCommand(array('key' => 'value'), TRUE);
+    $command = new SettingsCommand(['key' => 'value'], TRUE);
 
-    $expected = array(
+    $expected = [
       'command' => 'settings',
-      'settings' => array('key' => 'value'),
+      'settings' => ['key' => 'value'],
       'merge' => TRUE,
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -293,13 +293,13 @@ public function testSettingsCommand() {
    */
   public function testOpenDialogCommand() {
     $command = $this->getMockBuilder('Drupal\Core\Ajax\OpenDialogCommand')
-      ->setConstructorArgs(array(
-        '#some-dialog', 'Title', '<p>Text!</p>', array(
+      ->setConstructorArgs([
+        '#some-dialog', 'Title', '<p>Text!</p>', [
           'url' => FALSE,
           'width' => 500,
-        ),
-      ))
-      ->setMethods(array('getRenderedContent'))
+        ],
+      ])
+      ->setMethods(['getRenderedContent'])
       ->getMock();
 
     // This method calls the render service, which isn't available. We want it
@@ -308,18 +308,18 @@ public function testOpenDialogCommand() {
       ->method('getRenderedContent')
       ->willReturn('rendered content');
 
-    $expected = array(
+    $expected = [
       'command' => 'openDialog',
       'selector' => '#some-dialog',
       'settings' => NULL,
       'data' => 'rendered content',
-      'dialogOptions' => array(
+      'dialogOptions' => [
         'url' => FALSE,
         'width' => 500,
         'title' => 'Title',
         'modal' => FALSE,
-      ),
-    );
+      ],
+    ];
     $this->assertEquals($expected, $command->render());
   }
 
@@ -328,13 +328,13 @@ public function testOpenDialogCommand() {
    */
   public function testOpenModalDialogCommand() {
     $command = $this->getMockBuilder('Drupal\Core\Ajax\OpenModalDialogCommand')
-      ->setConstructorArgs(array(
-        'Title', '<p>Text!</p>', array(
+      ->setConstructorArgs([
+        'Title', '<p>Text!</p>', [
           'url' => 'example',
           'width' => 500,
-        ),
-      ))
-      ->setMethods(array('getRenderedContent'))
+        ],
+      ])
+      ->setMethods(['getRenderedContent'])
       ->getMock();
 
     // This method calls the render service, which isn't available. We want it
@@ -343,18 +343,18 @@ public function testOpenModalDialogCommand() {
       ->method('getRenderedContent')
       ->willReturn('rendered content');
 
-    $expected = array(
+    $expected = [
       'command' => 'openDialog',
       'selector' => '#drupal-modal',
       'settings' => NULL,
       'data' => 'rendered content',
-      'dialogOptions' => array(
+      'dialogOptions' => [
         'url' => 'example',
         'width' => 500,
         'title' => 'Title',
         'modal' => TRUE,
-      ),
-    );
+      ],
+    ];
     $this->assertEquals($expected, $command->render());
   }
 
@@ -363,11 +363,11 @@ public function testOpenModalDialogCommand() {
    */
   public function testCloseModalDialogCommand() {
     $command = new CloseModalDialogCommand();
-    $expected = array(
+    $expected = [
       'command' => 'closeDialog',
       'selector' => '#drupal-modal',
       'persist' => FALSE,
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -377,11 +377,11 @@ public function testCloseModalDialogCommand() {
    */
   public function testCloseDialogCommand() {
     $command = new CloseDialogCommand('#some-dialog', TRUE);
-    $expected = array(
+    $expected = [
       'command' => 'closeDialog',
       'selector' => '#some-dialog',
       'persist' => TRUE,
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -391,12 +391,12 @@ public function testCloseDialogCommand() {
    */
   public function testSetDialogOptionCommand() {
     $command = new SetDialogOptionCommand('#some-dialog', 'width', '500');
-    $expected = array(
+    $expected = [
       'command' => 'setDialogOption',
       'selector' => '#some-dialog',
       'optionName' => 'width',
       'optionValue' => '500',
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -406,12 +406,12 @@ public function testSetDialogOptionCommand() {
    */
   public function testSetDialogTitleCommand() {
     $command = new SetDialogTitleCommand('#some-dialog', 'Example');
-    $expected = array(
+    $expected = [
       'command' => 'setDialogOption',
       'selector' => '#some-dialog',
       'optionName' => 'title',
       'optionValue' => 'Example',
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
@@ -421,10 +421,10 @@ public function testSetDialogTitleCommand() {
    */
   public function testRedirectCommand() {
     $command = new RedirectCommand('http://example.com');
-    $expected = array(
+    $expected = [
       'command' => 'redirect',
       'url' => 'http://example.com',
-    );
+    ];
 
     $this->assertEquals($expected, $command->render());
   }
diff --git a/core/tests/Drupal/Tests/Core/Ajax/AjaxResponseTest.php b/core/tests/Drupal/Tests/Core/Ajax/AjaxResponseTest.php
index fcfa4139270ec05ba21d0cc20105634ac7850ff4..880aaecf295f485964db4f50bcf5a8a6dd7f2faa 100644
--- a/core/tests/Drupal/Tests/Core/Ajax/AjaxResponseTest.php
+++ b/core/tests/Drupal/Tests/Core/Ajax/AjaxResponseTest.php
@@ -36,15 +36,15 @@ public function testCommands() {
     $command_one = $this->getMock('Drupal\Core\Ajax\CommandInterface');
     $command_one->expects($this->once())
       ->method('render')
-      ->will($this->returnValue(array('command' => 'one')));
+      ->will($this->returnValue(['command' => 'one']));
     $command_two = $this->getMock('Drupal\Core\Ajax\CommandInterface');
     $command_two->expects($this->once())
       ->method('render')
-      ->will($this->returnValue(array('command' => 'two')));
+      ->will($this->returnValue(['command' => 'two']));
     $command_three = $this->getMock('Drupal\Core\Ajax\CommandInterface');
     $command_three->expects($this->once())
       ->method('render')
-      ->will($this->returnValue(array('command' => 'three')));
+      ->will($this->returnValue(['command' => 'three']));
 
     $this->ajaxResponse->addCommand($command_one);
     $this->ajaxResponse->addCommand($command_two);
@@ -52,9 +52,9 @@ public function testCommands() {
 
     // Ensure that the added commands are in the right order.
     $commands =& $this->ajaxResponse->getCommands();
-    $this->assertSame($commands[1], array('command' => 'one'));
-    $this->assertSame($commands[2], array('command' => 'two'));
-    $this->assertSame($commands[0], array('command' => 'three'));
+    $this->assertSame($commands[1], ['command' => 'one']);
+    $this->assertSame($commands[2], ['command' => 'two']);
+    $this->assertSame($commands[0], ['command' => 'three']);
 
     // Remove one and change one element from commands and ensure the reference
     // worked as expected.
@@ -62,9 +62,9 @@ public function testCommands() {
     $commands[0]['class'] = 'test-class';
 
     $commands = $this->ajaxResponse->getCommands();
-    $this->assertSame($commands[1], array('command' => 'one'));
+    $this->assertSame($commands[1], ['command' => 'one']);
     $this->assertFalse(isset($commands[2]));
-    $this->assertSame($commands[0], array('command' => 'three', 'class' => 'test-class'));
+    $this->assertSame($commands[0], ['command' => 'three', 'class' => 'test-class']);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Annotation/TranslationTest.php b/core/tests/Drupal/Tests/Core/Annotation/TranslationTest.php
index ead56ae425109fb04d2cee3793f32dd4e0807dd4..7be87f593f3188447ec81b73753bca5b79bcb460 100644
--- a/core/tests/Drupal/Tests/Core/Annotation/TranslationTest.php
+++ b/core/tests/Drupal/Tests/Core/Annotation/TranslationTest.php
@@ -36,10 +36,10 @@ public function testGet(array $values, $expected) {
     $container->set('string_translation', $this->translationManager);
     \Drupal::setContainer($container);
 
-    $arguments = isset($values['arguments']) ? $values['arguments'] : array();
-    $options = isset($values['context']) ? array(
+    $arguments = isset($values['arguments']) ? $values['arguments'] : [];
+    $options = isset($values['context']) ? [
       'context' => $values['context'],
-    ) : array();
+    ] : [];
 
     $annotation = new Translation($values);
 
@@ -50,27 +50,27 @@ public function testGet(array $values, $expected) {
    * Provides data to self::testGet().
    */
   public function providerTestGet() {
-    $data = array();
-    $data[] = array(
-      array(
+    $data = [];
+    $data[] = [
+      [
         'value' => 'Foo',
-      ),
+      ],
       'Foo'
-    );
+    ];
     $random = $this->randomMachineName();
     $random_html_entity = '&' . $random;
-    $data[] = array(
-      array(
+    $data[] = [
+      [
         'value' => 'Foo @bar @baz %qux',
-        'arguments' => array(
+        'arguments' => [
           '@bar' => $random,
           '@baz' => $random_html_entity,
           '%qux' => $random_html_entity,
-        ),
+        ],
         'context' => $this->randomMachineName(),
-      ),
+      ],
       'Foo ' . $random . ' &amp;' . $random . ' <em class="placeholder">&amp;' . $random . '</em>',
-    );
+    ];
 
     return $data;
   }
diff --git a/core/tests/Drupal/Tests/Core/Asset/CssCollectionGrouperUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/CssCollectionGrouperUnitTest.php
index 1e380c8611aa7c179c584eabe8fddc661629a7ae..c75dc0442801e1c09493cae794d3d1ca2d0dd209 100644
--- a/core/tests/Drupal/Tests/Core/Asset/CssCollectionGrouperUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/CssCollectionGrouperUnitTest.php
@@ -29,78 +29,78 @@ protected function setUp() {
    * Tests \Drupal\Core\Asset\CssCollectionGrouper.
    */
   function testGrouper() {
-    $css_assets = array(
-      'system.base.css' => array(
+    $css_assets = [
+      'system.base.css' => [
         'group' => -100,
         'type' => 'file',
         'weight' => 0.012,
         'media' => 'all',
         'preprocess' => TRUE,
         'data' => 'core/modules/system/system.base.css',
-        'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+        'browsers' => ['IE' => TRUE, '!IE' => TRUE],
         'basename' => 'system.base.css',
-      ),
-      'js.module.css' => array(
+      ],
+      'js.module.css' => [
         'group' => -100,
         'type' => 'file',
         'weight' => 0.013,
         'media' => 'all',
         'preprocess' => TRUE,
         'data' => 'core/modules/system/js.module.css',
-        'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+        'browsers' => ['IE' => TRUE, '!IE' => TRUE],
         'basename' => 'js.module.css',
-      ),
-      'jquery.ui.core.css' => array(
+      ],
+      'jquery.ui.core.css' => [
         'group' => -100,
         'type' => 'file',
         'weight' => 0.004,
         'media' => 'all',
         'preprocess' => TRUE,
         'data' => 'core/misc/ui/themes/base/jquery.ui.core.css',
-        'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+        'browsers' => ['IE' => TRUE, '!IE' => TRUE],
         'basename' => 'jquery.ui.core.css',
-      ),
-      'field.css' => array(
+      ],
+      'field.css' => [
         'group' => 0,
         'type' => 'file',
         'weight' => 0.011,
         'media' => 'all',
         'preprocess' => TRUE,
         'data' => 'core/modules/field/theme/field.css',
-        'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+        'browsers' => ['IE' => TRUE, '!IE' => TRUE],
         'basename' => 'field.css',
-      ),
-      'external.css' => array(
+      ],
+      'external.css' => [
         'group' => 0,
         'type' => 'external',
         'weight' => 0.009,
         'media' => 'all',
         'preprocess' => TRUE,
         'data' => 'http://example.com/external.css',
-        'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+        'browsers' => ['IE' => TRUE, '!IE' => TRUE],
         'basename' => 'external.css',
-      ),
-      'elements.css' => array(
+      ],
+      'elements.css' => [
         'group' => 100,
         'media' => 'all',
         'type' => 'file',
         'weight' => 0.001,
         'preprocess' => TRUE,
         'data' => 'core/themes/bartik/css/base/elements.css',
-        'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+        'browsers' => ['IE' => TRUE, '!IE' => TRUE],
         'basename' => 'elements.css',
-      ),
-      'print.css' => array(
+      ],
+      'print.css' => [
         'group' => 100,
         'media' => 'print',
         'type' => 'file',
         'weight' => 0.003,
         'preprocess' => TRUE,
         'data' => 'core/themes/bartik/css/print.css',
-        'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+        'browsers' => ['IE' => TRUE, '!IE' => TRUE],
         'basename' => 'print.css',
-      ),
-    );
+      ],
+    ];
 
     $groups = $this->grouper->group($css_assets);
 
diff --git a/core/tests/Drupal/Tests/Core/Asset/CssCollectionRendererUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/CssCollectionRendererUnitTest.php
index 86026610535016441a6ff0663698d666eeda3e84..96a43b0b99aa1f98be5c0e7c6978c3a38e34856a 100644
--- a/core/tests/Drupal/Tests/Core/Asset/CssCollectionRendererUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/CssCollectionRendererUnitTest.php
@@ -39,35 +39,35 @@ protected function setUp() {
     $this->state = $this->getMock('Drupal\Core\State\StateInterface');
 
     $this->renderer = new CssCollectionRenderer($this->state);
-    $this->fileCssGroup = array(
+    $this->fileCssGroup = [
       'group' => -100,
       'type' => 'file',
       'media' => 'all',
       'preprocess' => TRUE,
-      'browsers' => array('IE' => TRUE, '!IE' => TRUE),
-      'items' => array(
-        0 => array(
+      'browsers' => ['IE' => TRUE, '!IE' => TRUE],
+      'items' => [
+        0 => [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.012,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => 'tests/Drupal/Tests/Core/Asset/foo.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'foo.css',
-        ),
-        1 => array(
+        ],
+        1 => [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => 'tests/Drupal/Tests/Core/Asset/bar.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'bar.css',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -76,59 +76,59 @@ protected function setUp() {
    * @see testRender
    */
   function providerTestRender() {
-    $create_link_element = function($href, $media = 'all', $browsers = array()) {
-      return array(
+    $create_link_element = function($href, $media = 'all', $browsers = []) {
+      return [
         '#type' => 'html_tag',
         '#tag' => 'link',
-        '#attributes' => array(
+        '#attributes' => [
           'rel' => 'stylesheet',
           'href' => $href,
           'media' => $media,
-        ),
+        ],
         '#browsers' => $browsers,
-      );
+      ];
     };
-    $create_style_element = function($value, $media, $browsers = array()) {
-      $style_element = array(
+    $create_style_element = function($value, $media, $browsers = []) {
+      $style_element = [
         '#type' => 'html_tag',
         '#tag' => 'style',
         '#value' => $value,
-        '#attributes' => array(
+        '#attributes' => [
           'media' => $media
-        ),
+        ],
         '#browsers' => $browsers,
-      );
+      ];
       return $style_element;
     };
 
     $create_file_css_asset = function($data, $media = 'all', $preprocess = TRUE) {
-      return array('group' => 0, 'type' => 'file', 'media' => $media, 'preprocess' => $preprocess, 'data' => $data, 'browsers' => array());
+      return ['group' => 0, 'type' => 'file', 'media' => $media, 'preprocess' => $preprocess, 'data' => $data, 'browsers' => []];
     };
 
-    return array(
+    return [
       // Single external CSS asset.
-      0 => array(
+      0 => [
         // CSS assets.
-        array(
-          0 => array('group' => 0, 'type' => 'external', 'media' => 'all', 'preprocess' => TRUE, 'data' => 'http://example.com/popular.js', 'browsers' => array()),
-        ),
+        [
+          0 => ['group' => 0, 'type' => 'external', 'media' => 'all', 'preprocess' => TRUE, 'data' => 'http://example.com/popular.js', 'browsers' => []],
+        ],
         // Render elements.
-        array(
+        [
           0 => $create_link_element('http://example.com/popular.js', 'all'),
-        ),
-      ),
+        ],
+      ],
       // Single file CSS asset.
-      2 => array(
-        array(
-          0 => array('group' => 0, 'type' => 'file', 'media' => 'all', 'preprocess' => TRUE, 'data' => 'public://css/file-all', 'browsers' => array()),
-        ),
-        array(
+      2 => [
+        [
+          0 => ['group' => 0, 'type' => 'file', 'media' => 'all', 'preprocess' => TRUE, 'data' => 'public://css/file-all', 'browsers' => []],
+        ],
+        [
           0 => $create_link_element(file_url_transform_relative(file_create_url('public://css/file-all')) . '?0', 'all'),
-        ),
-      ),
+        ],
+      ],
       // 31 file CSS assets: expect 31 link elements.
-      3 => array(
-        array(
+      3 => [
+        [
           0 => $create_file_css_asset('public://css/1.css'),
           1 => $create_file_css_asset('public://css/2.css'),
           2 => $create_file_css_asset('public://css/3.css'),
@@ -160,8 +160,8 @@ function providerTestRender() {
           28 => $create_file_css_asset('public://css/29.css'),
           29 => $create_file_css_asset('public://css/30.css'),
           30 => $create_file_css_asset('public://css/31.css'),
-        ),
-        array(
+        ],
+        [
           0 => $create_link_element(file_url_transform_relative(file_create_url('public://css/1.css')) . '?0'),
           1 => $create_link_element(file_url_transform_relative(file_create_url('public://css/2.css')) . '?0'),
           2 => $create_link_element(file_url_transform_relative(file_create_url('public://css/3.css')) . '?0'),
@@ -193,11 +193,11 @@ function providerTestRender() {
           28 => $create_link_element(file_url_transform_relative(file_create_url('public://css/29.css')) . '?0'),
           29 => $create_link_element(file_url_transform_relative(file_create_url('public://css/30.css')) . '?0'),
           30 => $create_link_element(file_url_transform_relative(file_create_url('public://css/31.css')) . '?0'),
-        ),
-      ),
+        ],
+      ],
       // 32 file CSS assets with the same properties: expect 2 style elements.
-      4 => array(
-        array(
+      4 => [
+        [
           0 => $create_file_css_asset('public://css/1.css'),
           1 => $create_file_css_asset('public://css/2.css'),
           2 => $create_file_css_asset('public://css/3.css'),
@@ -230,8 +230,8 @@ function providerTestRender() {
           29 => $create_file_css_asset('public://css/30.css'),
           30 => $create_file_css_asset('public://css/31.css'),
           31 => $create_file_css_asset('public://css/32.css'),
-        ),
-        array(
+        ],
+        [
           0 => $create_style_element('
 @import url("' . file_url_transform_relative(file_create_url('public://css/1.css')) . '?0");
 @import url("' . file_url_transform_relative(file_create_url('public://css/2.css')) . '?0");
@@ -268,13 +268,13 @@ function providerTestRender() {
           1 => $create_style_element('
 @import url("' . file_url_transform_relative(file_create_url('public://css/32.css')) . '?0");
 ', 'all'),
-        ),
-      ),
+        ],
+      ],
       // 32 file CSS assets with the same properties, except for the 10th and
       // 20th files, they have different 'media' properties. Expect 5 style
       // elements.
-      5 => array(
-        array(
+      5 => [
+        [
           0 => $create_file_css_asset('public://css/1.css'),
           1 => $create_file_css_asset('public://css/2.css'),
           2 => $create_file_css_asset('public://css/3.css'),
@@ -307,8 +307,8 @@ function providerTestRender() {
           29 => $create_file_css_asset('public://css/30.css'),
           30 => $create_file_css_asset('public://css/31.css'),
           31 => $create_file_css_asset('public://css/32.css'),
-        ),
-        array(
+        ],
+        [
           0 => $create_style_element('
 @import url("' . file_url_transform_relative(file_create_url('public://css/1.css')) . '?0");
 @import url("' . file_url_transform_relative(file_create_url('public://css/2.css')) . '?0");
@@ -351,12 +351,12 @@ function providerTestRender() {
 @import url("' . file_url_transform_relative(file_create_url('public://css/31.css')) . '?0");
 @import url("' . file_url_transform_relative(file_create_url('public://css/32.css')) . '?0");
 ', 'all'),
-        ),
-      ),
+        ],
+      ],
       // 32 file CSS assets with the same properties, except for the 15th, which
       // has 'preprocess' = FALSE. Expect 1 link element and 2 style elements.
-      6 => array(
-        array(
+      6 => [
+        [
           0 => $create_file_css_asset('public://css/1.css'),
           1 => $create_file_css_asset('public://css/2.css'),
           2 => $create_file_css_asset('public://css/3.css'),
@@ -389,8 +389,8 @@ function providerTestRender() {
           29 => $create_file_css_asset('public://css/30.css'),
           30 => $create_file_css_asset('public://css/31.css'),
           31 => $create_file_css_asset('public://css/32.css'),
-        ),
-        array(
+        ],
+        [
           0 => $create_style_element('
 @import url("' . file_url_transform_relative(file_create_url('public://css/1.css')) . '?0");
 @import url("' . file_url_transform_relative(file_create_url('public://css/2.css')) . '?0");
@@ -427,9 +427,9 @@ function providerTestRender() {
 @import url("' . file_url_transform_relative(file_create_url('public://css/31.css')) . '?0");
 @import url("' . file_url_transform_relative(file_create_url('public://css/32.css')) . '?0");
 ', 'all'),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -455,14 +455,14 @@ function testRenderInvalidType() {
       ->will($this->returnValue(NULL));
     $this->setExpectedException('Exception', 'Invalid CSS asset type.');
 
-    $css_group = array(
+    $css_group = [
       'group' => 0,
       'type' => 'internal',
       'media' => 'all',
       'preprocess' => TRUE,
-      'browsers' => array(),
+      'browsers' => [],
       'data' => 'http://example.com/popular.js'
-    );
+    ];
     $this->renderer->render($css_group);
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Asset/CssOptimizerUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/CssOptimizerUnitTest.php
index 48d2f4676c0fdd770692fd500acb752583d7a72d..cf7d3ff9849ff717ff20b63800f5ba8f0b810510 100644
--- a/core/tests/Drupal/Tests/Core/Asset/CssOptimizerUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/CssOptimizerUnitTest.php
@@ -36,24 +36,24 @@ protected function setUp() {
   function providerTestOptimize() {
     $path = 'core/tests/Drupal/Tests/Core/Asset/css_test_files/';
     $absolute_path = dirname(__FILE__) . '/css_test_files/';
-    return array(
+    return [
       // File. Tests:
       // - Stripped comments and white-space.
       // - Retain white-space in selectors. (https://www.drupal.org/node/472820)
       // - Retain pseudo-selectors. (https://www.drupal.org/node/460448)
-      array(
-        array(
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.012,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'css_input_without_import.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'css_input_without_import.css',
-        ),
+        ],
         file_get_contents($absolute_path . 'css_input_without_import.css.optimized.css'),
-      ),
+      ],
       // File. Tests:
       // - Proper URLs in imported files. (https://www.drupal.org/node/265719)
       // - A background image with relative paths, which must be rewritten.
@@ -61,146 +61,146 @@ function providerTestOptimize() {
       //   file_create_url(). (https://www.drupal.org/node/1961340)
       // - Imported files that are external (protocol-relative URL or not)
       //   should not be expanded. (https://www.drupal.org/node/2014851)
-      array(
-        array(
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'css_input_with_import.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'css_input_with_import.css',
-        ),
+        ],
         str_replace('url(images/icon.png)', 'url(' . file_url_transform_relative(file_create_url($path . 'images/icon.png')) . ')', file_get_contents($absolute_path . 'css_input_with_import.css.optimized.css')),
-      ),
+      ],
       // File. Tests:
       // - Retain comment hacks.
-      array(
-        array(
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'comment_hacks.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'comment_hacks.css',
-        ),
+        ],
         file_get_contents($absolute_path . 'comment_hacks.css.optimized.css'),
-      ),
+      ],
       // File in subfolder. Tests:
       // - CSS import path is properly interpreted.
       //   (https://www.drupal.org/node/1198904)
       // - Don't adjust data URIs (https://www.drupal.org/node/2142441)
-      array(
-        array(
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'css_subfolder/css_input_with_import.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'css_input_with_import.css',
-        ),
+        ],
         str_replace('url(../images/icon.png)', 'url(' . file_url_transform_relative(file_create_url($path . 'images/icon.png')) . ')', file_get_contents($absolute_path . 'css_subfolder/css_input_with_import.css.optimized.css')),
-      ),
+      ],
       // File. Tests:
       // - Any @charaset declaration at the beginning of a file should be
       //   removed without breaking subsequent CSS.
-      array(
-        array(
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'charset_sameline.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'charset_sameline.css',
-        ),
+        ],
         file_get_contents($absolute_path . 'charset.css.optimized.css'),
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'charset_newline.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'charset_newline.css',
-        ),
+        ],
         file_get_contents($absolute_path . 'charset.css.optimized.css'),
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'css_input_with_bom.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'css_input_with_bom.css',
-        ),
+        ],
         '.byte-order-mark-test{content:"☃";}' . "\n",
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'css_input_with_charset.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'css_input_with_charset.css',
-        ),
+        ],
         '.charset-test{content:"€";}' . "\n",
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'css_input_with_bom_and_charset.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'css_input_with_bom_and_charset.css',
-        ),
+        ],
         '.byte-order-mark-charset-test{content:"☃";}' . "\n",
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'css_input_with_utf16_bom.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'css_input_with_utf16_bom.css',
-        ),
+        ],
         '.utf16-byte-order-mark-test{content:"☃";}' . "\n",
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           'group' => -100,
           'type' => 'file',
           'weight' => 0.013,
           'media' => 'all',
           'preprocess' => TRUE,
           'data' => $path . 'quotes.css',
-          'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+          'browsers' => ['IE' => TRUE, '!IE' => TRUE],
           'basename' => 'quotes.css',
-        ),
+        ],
         file_get_contents($absolute_path . 'quotes.css.optimized.css'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -229,7 +229,7 @@ function testOptimize($css_asset, $expected) {
   function testTypeFilePreprocessingDisabled() {
     $this->setExpectedException('Exception', 'Only file CSS assets with preprocessing enabled can be optimized.');
 
-    $css_asset = array(
+    $css_asset = [
       'group' => -100,
       'type' => 'file',
       'weight' => 0.012,
@@ -237,9 +237,9 @@ function testTypeFilePreprocessingDisabled() {
       // Preprocessing disabled.
       'preprocess' => FALSE,
       'data' => 'tests/Drupal/Tests/Core/Asset/foo.css',
-      'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+      'browsers' => ['IE' => TRUE, '!IE' => TRUE],
       'basename' => 'foo.css',
-    );
+    ];
     $this->optimizer->optimize($css_asset);
   }
 
@@ -249,7 +249,7 @@ function testTypeFilePreprocessingDisabled() {
   function testTypeExternal() {
     $this->setExpectedException('Exception', 'Only file CSS assets can be optimized.');
 
-    $css_asset = array(
+    $css_asset = [
       'group' => -100,
       // Type external.
       'type' => 'external',
@@ -257,8 +257,8 @@ function testTypeExternal() {
       'media' => 'all',
       'preprocess' => TRUE,
       'data' => 'http://example.com/foo.js',
-      'browsers' => array('IE' => TRUE, '!IE' => TRUE),
-    );
+      'browsers' => ['IE' => TRUE, '!IE' => TRUE],
+    ];
     $this->optimizer->optimize($css_asset);
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
index df71c220d2c474babf02e9c9db4ab2b5e3a3989a..e2d55efe21ff2163a5b9f39da53931e98183cd60 100644
--- a/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
@@ -38,32 +38,32 @@ protected function setUp() {
    */
   function providerTestClean() {
     $path = dirname(__FILE__) . '/js_test_files/';
-    return array(
+    return [
       // File. Tests:
       // - Stripped sourceMappingURL with comment # syntax.
-      0 => array(
+      0 => [
         file_get_contents($path . 'source_mapping_url.min.js'),
         file_get_contents($path . 'source_mapping_url.min.js.optimized.js'),
-      ),
+      ],
       // File. Tests:
       // - Stripped sourceMappingURL with comment @ syntax.
-      1 => array(
+      1 => [
         file_get_contents($path . 'source_mapping_url_old.min.js'),
         file_get_contents($path . 'source_mapping_url_old.min.js.optimized.js'),
-      ),
+      ],
       // File. Tests:
       // - Stripped sourceURL with comment # syntax.
-      2 => array(
+      2 => [
         file_get_contents($path . 'source_url.min.js'),
         file_get_contents($path . 'source_url.min.js.optimized.js'),
-      ),
+      ],
       // File. Tests:
       // - Stripped sourceURL with comment @ syntax.
-      3 => array(
+      3 => [
         file_get_contents($path . 'source_url_old.min.js'),
         file_get_contents($path . 'source_url_old.min.js.optimized.js'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -85,33 +85,33 @@ function testClean($js_asset, $expected) {
    */
   function providerTestOptimize() {
     $path = dirname(__FILE__) . '/js_test_files/';
-    return array(
-      0 => array(
-        array(
+    return [
+      0 => [
+        [
           'type' => 'file',
           'preprocess' => TRUE,
           'data' => $path . 'utf8_bom.js',
-        ),
+        ],
         file_get_contents($path . 'utf8_bom.js.optimized.js'),
-      ),
-      1 => array(
-        array(
+      ],
+      1 => [
+        [
           'type' => 'file',
           'preprocess' => TRUE,
           'data' => $path . 'utf16_bom.js',
-        ),
+        ],
         file_get_contents($path . 'utf16_bom.js.optimized.js'),
-      ),
-      2 => array(
-        array(
+      ],
+      2 => [
+        [
           'type' => 'file',
           'preprocess' => TRUE,
           'data' => $path . 'latin_9.js',
-          'attributes' => array('charset' => 'ISO-8859-15'),
-        ),
+          'attributes' => ['charset' => 'ISO-8859-15'],
+        ],
         file_get_contents($path . 'latin_9.js.optimized.js'),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Asset/LibraryDependencyResolverTest.php b/core/tests/Drupal/Tests/Core/Asset/LibraryDependencyResolverTest.php
index a7a026a826cc88bde8a42c15bc0c07985285f03c..40e18210800ba981de63faec7509b5236abc9ceb 100644
--- a/core/tests/Drupal/Tests/Core/Asset/LibraryDependencyResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/LibraryDependencyResolverTest.php
@@ -37,7 +37,7 @@ class LibraryDependencyResolverTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $libraryData = array(
+  protected $libraryData = [
     'no_deps_a' => ['js' => [], 'css' => []],
     'no_deps_b' => ['js' => [], 'css' => []],
     'no_deps_c' => ['js' => [], 'css' => []],
@@ -47,7 +47,7 @@ class LibraryDependencyResolverTest extends UnitTestCase {
     'nested_deps_a' => ['js' => [], 'css' => [], 'dependencies' => ['test/deps_a']],
     'nested_deps_b' => ['js' => [], 'css' => [], 'dependencies' => ['test/nested_deps_a']],
     'nested_deps_c' => ['js' => [], 'css' => [], 'dependencies' => ['test/nested_deps_b']],
-  );
+  ];
 
   /**
    * {@inheritdoc}
diff --git a/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryCollectorTest.php b/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryCollectorTest.php
index 0d82bfbe66986ca4d0870d91c351df0df2759356..2eb34d33f94e132c3cc499fc13e9f6d869c50603 100644
--- a/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryCollectorTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryCollectorTest.php
@@ -52,16 +52,16 @@ class LibraryDiscoveryCollectorTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $libraryData = array(
-    'test_1' => array(
-      'js' => array(),
-      'css' => array(),
-    ),
-    'test_2' => array(
-      'js' => array(),
-      'css' => array(),
-    ),
-  );
+  protected $libraryData = [
+    'test_1' => [
+      'js' => [],
+      'css' => [],
+    ],
+    'test_2' => [
+      'js' => [],
+      'css' => [],
+    ],
+  ];
 
   protected $activeTheme;
 
@@ -140,7 +140,7 @@ public function testDestruct() {
       ->willReturn(FALSE);
     $this->cache->expects($this->once())
       ->method('set')
-      ->with('library_info:kitten_theme', array('test' => $this->libraryData), Cache::PERMANENT, ['library_info']);
+      ->with('library_info:kitten_theme', ['test' => $this->libraryData], Cache::PERMANENT, ['library_info']);
     $this->lock->expects($this->once())
       ->method('release')
       ->with($lock_key);
diff --git a/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php b/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php
index 121aebc953bf8588ef48e4ff21cef7a69b4acb0d..ca71c81c0d5f8d2a94ab04ec51fd9f008766b7ee 100644
--- a/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php
@@ -137,7 +137,7 @@ public function testBuildByExtensionWithMissingLibraryFile() {
     $path = substr($path, strlen($this->root) + 1);
     $this->libraryDiscoveryParser->setPaths('module', 'example_module', $path);
 
-    $this->assertSame($this->libraryDiscoveryParser->buildByExtension('example_module'), array());
+    $this->assertSame($this->libraryDiscoveryParser->buildByExtension('example_module'), []);
   }
 
   /**
@@ -320,7 +320,7 @@ public function testLibraryWithCssJsSetting() {
     $this->assertEquals('file', $library['css'][0]['type']);
     $this->assertEquals($path . '/css/base.css', $library['css'][0]['data']);
 
-    $this->assertEquals(array('key' => 'value'), $library['drupalSettings']);
+    $this->assertEquals(['key' => 'value'], $library['drupalSettings']);
   }
 
   /**
@@ -443,65 +443,65 @@ public function testLibraryWithLicenses() {
     $this->assertCount(1, $library['css']);
     $this->assertCount(1, $library['js']);
     $this->assertTrue(isset($library['license']));
-    $default_license = array(
+    $default_license = [
       'name' => 'GNU-GPL-2.0-or-later',
       'url' => 'https://www.drupal.org/licensing/faq',
       'gpl-compatible' => TRUE,
-    );
+    ];
     $this->assertEquals($library['license'], $default_license);
 
     // GPL2-licensed libraries.
     $library = $libraries['gpl2'];
     $this->assertCount(1, $library['css']);
     $this->assertCount(1, $library['js']);
-    $expected_license = array(
+    $expected_license = [
       'name' => 'gpl2',
       'url' => 'https://url-to-gpl2-license',
       'gpl-compatible' => TRUE,
-    );
+    ];
     $this->assertEquals($library['license'], $expected_license);
 
     // MIT-licensed libraries.
     $library = $libraries['mit'];
     $this->assertCount(1, $library['css']);
     $this->assertCount(1, $library['js']);
-    $expected_license = array(
+    $expected_license = [
       'name' => 'MIT',
       'url' => 'https://url-to-mit-license',
       'gpl-compatible' => TRUE,
-    );
+    ];
     $this->assertEquals($library['license'], $expected_license);
 
     // Libraries in the Public Domain.
     $library = $libraries['public-domain'];
     $this->assertCount(1, $library['css']);
     $this->assertCount(1, $library['js']);
-    $expected_license = array(
+    $expected_license = [
       'name' => 'Public Domain',
       'url' => 'https://url-to-public-domain-license',
       'gpl-compatible' => TRUE,
-    );
+    ];
     $this->assertEquals($library['license'], $expected_license);
 
     // Apache-licensed libraries.
     $library = $libraries['apache'];
     $this->assertCount(1, $library['css']);
     $this->assertCount(1, $library['js']);
-    $expected_license = array(
+    $expected_license = [
       'name' => 'apache',
       'url' => 'https://url-to-apache-license',
       'gpl-compatible' => FALSE,
-    );
+    ];
     $this->assertEquals($library['license'], $expected_license);
 
     // Copyrighted libraries.
     $library = $libraries['copyright'];
     $this->assertCount(1, $library['css']);
     $this->assertCount(1, $library['js']);
-    $expected_license = array(
+    $expected_license = [
       'name' => '© Some company',
       'gpl-compatible' => FALSE,
-    );
+    ];
     $this->assertEquals($library['license'], $expected_license);
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Batch/PercentagesTest.php b/core/tests/Drupal/Tests/Core/Batch/PercentagesTest.php
index d2e0c1317290b75ac6839086412c74a0c23dcda2..0c905e6d98018710eaeefa78bdadc5de70c1f3af 100644
--- a/core/tests/Drupal/Tests/Core/Batch/PercentagesTest.php
+++ b/core/tests/Drupal/Tests/Core/Batch/PercentagesTest.php
@@ -13,7 +13,7 @@
  * in all cases.
  */
 class PercentagesTest extends UnitTestCase {
-  protected $testCases = array();
+  protected $testCases = [];
 
   /**
    * @dataProvider providerTestPercentages
@@ -31,39 +31,39 @@ public function testPercentages($total, $current, $expected_result) {
    */
   public function providerTestPercentages() {
     // Set up an array of test cases.
-    return array(
+    return [
       // array(total, current, expected).
       // 1/2 is 50%.
-      array(2, 1, '50'),
+      [2, 1, '50'],
       // Though we should never encounter a case where the current set is set
       // 0, if we did, we should get 0%.
-      array(3, 0, '0'),
+      [3, 0, '0'],
       // 1/3 is closer to 33% than to 34%.
-      array(3, 1, '33'),
+      [3, 1, '33'],
       // 2/3 is closer to 67% than to 66%.
-      array(3, 2, '67'),
+      [3, 2, '67'],
       // 1/199 should round up to 1%.
-      array(199, 1, '1'),
+      [199, 1, '1'],
       // 198/199 should round down to 99%.
-      array(199, 198, '99'),
+      [199, 198, '99'],
       // 199/200 would have rounded up to 100%, which would give the false
       // impression of being finished, so we add another digit and should get
       // 99.5%.
-      array(200, 199, '99.5'),
+      [200, 199, '99.5'],
       // The same logic holds for 1/200: we should get 0.5%.
-      array(200, 1, '0.5'),
+      [200, 1, '0.5'],
       // Numbers that come out evenly, such as 50/200, should be forced to have
       // extra digits for consistency.
-      array(200, 50, '25.0'),
+      [200, 50, '25.0'],
       // Regardless of number of digits we're using, 100% should always just be
       // 100%.
-      array(200, 200, '100'),
+      [200, 200, '100'],
       // 1998/1999 should similarly round down to 99.9%.
-      array(1999, 1998, '99.9'),
+      [1999, 1998, '99.9'],
       // 1999/2000 should add another digit and go to 99.95%.
-      array(2000, 1999, '99.95'),
+      [2000, 1999, '99.95'],
       // 19999/20000 should add yet another digit and go to 99.995%.
-      array(20000, 19999, '99.995'),
+      [20000, 19999, '99.995'],
       // The next five test cases simulate a batch with a single operation
       // ('total' equals 1) that takes several steps to complete. Within the
       // operation, we imagine that there are 501 items to process, and 100 are
@@ -72,12 +72,12 @@ public function providerTestPercentages() {
       // but for the last pass through, when 500 out of 501 items have been
       // processed, we do not want to round up to 100%, since that would
       // erroneously indicate that the processing is complete.
-      array('total' => 1, 'current' => 100 / 501, '20'),
-      array('total' => 1, 'current' => 200 / 501, '40'),
-      array('total' => 1, 'current' => 300 / 501, '60'),
-      array('total' => 1, 'current' => 400 / 501, '80'),
-      array('total' => 1, 'current' => 500 / 501, '99.8'),
-    );
+      ['total' => 1, 'current' => 100 / 501, '20'],
+      ['total' => 1, 'current' => 200 / 501, '40'],
+      ['total' => 1, 'current' => 300 / 501, '60'],
+      ['total' => 1, 'current' => 400 / 501, '80'],
+      ['total' => 1, 'current' => 500 / 501, '99.8'],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Block/BlockBaseTest.php b/core/tests/Drupal/Tests/Core/Block/BlockBaseTest.php
index 541c0c186a32b9b5274fcffc239c974069dfe55e..70bc7f22dde0078d4773b5dcbcb5613614c19aa3 100644
--- a/core/tests/Drupal/Tests/Core/Block/BlockBaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Block/BlockBaseTest.php
@@ -19,24 +19,24 @@ class BlockBaseTest extends UnitTestCase {
   public function testGetMachineNameSuggestion() {
     $module_handler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $transliteration = $this->getMockBuilder('Drupal\Core\Transliteration\PhpTransliteration')
-      ->setConstructorArgs(array(NULL, $module_handler))
-      ->setMethods(array('readLanguageOverrides'))
+      ->setConstructorArgs([NULL, $module_handler])
+      ->setMethods(['readLanguageOverrides'])
       ->getMock();
 
-    $config = array();
-    $definition = array(
+    $config = [];
+    $definition = [
       'admin_label' => 'Admin label',
       'provider' => 'block_test',
-    );
+    ];
     $block_base = new TestBlockInstantiation($config, 'test_block_instantiation', $definition);
     $block_base->setTransliteration($transliteration);
     $this->assertEquals('adminlabel', $block_base->getMachineNameSuggestion());
 
     // Test with more unicodes.
-    $definition = array(
+    $definition = [
       'admin_label' => 'über åwesome',
       'provider' => 'block_test',
-    );
+    ];
     $block_base = new TestBlockInstantiation($config, 'test_block_instantiation', $definition);
     $block_base->setTransliteration($transliteration);
     $this->assertEquals('uberawesome', $block_base->getMachineNameSuggestion());
diff --git a/core/tests/Drupal/Tests/Core/Breadcrumb/BreadcrumbManagerTest.php b/core/tests/Drupal/Tests/Core/Breadcrumb/BreadcrumbManagerTest.php
index 32ea0d017504447309f6198ed0c8337fed1e8018..be1469cd8eb5f8b5ef6ab68a54ae533b51c9999a 100644
--- a/core/tests/Drupal/Tests/Core/Breadcrumb/BreadcrumbManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Breadcrumb/BreadcrumbManagerTest.php
@@ -80,7 +80,7 @@ public function testBuildWithoutBuilder() {
    */
   public function testBuildWithSingleBuilder() {
     $builder = $this->getMock('Drupal\Core\Breadcrumb\BreadcrumbBuilderInterface');
-    $links = array('<a href="/example">Test</a>');
+    $links = ['<a href="/example">Test</a>'];
     $this->breadcrumb->setLinks($links);
     $this->breadcrumb->addCacheContexts(['foo'])->addCacheTags(['bar']);
 
@@ -95,7 +95,7 @@ public function testBuildWithSingleBuilder() {
     $route_match = $this->getMock('Drupal\Core\Routing\RouteMatchInterface');
     $this->moduleHandler->expects($this->once())
       ->method('alter')
-      ->with('system_breadcrumb', $this->breadcrumb, $route_match, array('builder' => $builder));
+      ->with('system_breadcrumb', $this->breadcrumb, $route_match, ['builder' => $builder]);
 
     $this->breadcrumbManager->addBuilder($builder, 0);
 
@@ -117,7 +117,7 @@ public function testBuildWithMultipleApplyingBuilders() {
       ->method('build');
 
     $builder2 = $this->getMock('Drupal\Core\Breadcrumb\BreadcrumbBuilderInterface');
-    $links2 = array('<a href="/example2">Test2</a>');
+    $links2 = ['<a href="/example2">Test2</a>'];
     $this->breadcrumb->setLinks($links2);
     $this->breadcrumb->addCacheContexts(['baz'])->addCacheTags(['qux']);
     $builder2->expects($this->once())
@@ -131,7 +131,7 @@ public function testBuildWithMultipleApplyingBuilders() {
 
     $this->moduleHandler->expects($this->once())
       ->method('alter')
-      ->with('system_breadcrumb', $this->breadcrumb, $route_match, array('builder' => $builder2));
+      ->with('system_breadcrumb', $this->breadcrumb, $route_match, ['builder' => $builder2]);
 
     $this->breadcrumbManager->addBuilder($builder1, 0);
     $this->breadcrumbManager->addBuilder($builder2, 10);
@@ -169,7 +169,7 @@ public function testBuildWithOneNotApplyingBuilders() {
 
     $this->moduleHandler->expects($this->once())
       ->method('alter')
-      ->with('system_breadcrumb', $this->breadcrumb, $route_match, array('builder' => $builder2));
+      ->with('system_breadcrumb', $this->breadcrumb, $route_match, ['builder' => $builder2]);
 
     $this->breadcrumbManager->addBuilder($builder1, 10);
     $this->breadcrumbManager->addBuilder($builder2, 0);
diff --git a/core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php b/core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php
index f035bde3b870f5c48dd713e66bba0066e10ee879..ad51768daf730c188dffd8e866cbe4e91b32adb7 100644
--- a/core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php
@@ -100,7 +100,7 @@ public function testGet() {
    * Test the get multiple feature.
    */
   public function testGetMultiple() {
-    $cids = array('t123', 't23', 't3', 't4');
+    $cids = ['t123', 't23', 't3', 't4'];
 
     $ret = $this->chain->getMultiple($cids);
     $this->assertSame($ret['t123']->data, 1231, 'Got key 123 and value is from the first backend');
@@ -175,7 +175,7 @@ public function testGetHasPropagated() {
    * Ensure get multiple values propagation to previous backends.
    */
   public function testGetMultipleHasPropagated() {
-    $cids = array('t3', 't23');
+    $cids = ['t3', 't23'];
     $this->chain->getMultiple($cids);
 
     $cached = $this->firstBackend->get('t3');
@@ -213,8 +213,8 @@ public function testDeleteAllPropagation() {
    */
   public function testDeleteTagsPropagation() {
     // Create two cache entries with the same tag and tag value.
-    $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, array('test_tag:2'));
-    $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, array('test_tag:2'));
+    $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, ['test_tag:2']);
+    $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, ['test_tag:2']);
     $this->assertNotSame(FALSE, $this->firstBackend->get('test_cid_clear1')
       && $this->firstBackend->get('test_cid_clear2')
       && $this->secondBackend->get('test_cid_clear1')
@@ -224,7 +224,7 @@ public function testDeleteTagsPropagation() {
       'Two cache items were created in all backends.');
 
     // Invalidate test_tag of value 1. This should invalidate both entries.
-    $this->chain->invalidateTags(array('test_tag:2'));
+    $this->chain->invalidateTags(['test_tag:2']);
     $this->assertSame(FALSE, $this->firstBackend->get('test_cid_clear1')
       && $this->firstBackend->get('test_cid_clear2')
       && $this->secondBackend->get('test_cid_clear1')
@@ -234,8 +234,8 @@ public function testDeleteTagsPropagation() {
       'Two caches removed from all backends after clearing a cache tag.');
 
     // Create two cache entries with the same tag and an array tag value.
-    $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, array('test_tag:1'));
-    $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, array('test_tag:1'));
+    $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, ['test_tag:1']);
+    $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, ['test_tag:1']);
     $this->assertNotSame(FALSE, $this->firstBackend->get('test_cid_clear1')
       && $this->firstBackend->get('test_cid_clear2')
       && $this->secondBackend->get('test_cid_clear1')
@@ -245,7 +245,7 @@ public function testDeleteTagsPropagation() {
       'Two cache items were created in all backends.');
 
     // Invalidate test_tag of value 1. This should invalidate both entries.
-    $this->chain->invalidateTags(array('test_tag:1'));
+    $this->chain->invalidateTags(['test_tag:1']);
     $this->assertSame(FALSE, $this->firstBackend->get('test_cid_clear1')
       && $this->firstBackend->get('test_cid_clear2')
       && $this->secondBackend->get('test_cid_clear1')
@@ -255,9 +255,9 @@ public function testDeleteTagsPropagation() {
       'Two caches removed from all backends after clearing a cache tag.');
 
     // Create three cache entries with a mix of tags and tag values.
-    $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, array('test_tag:1'));
-    $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, array('test_tag:2'));
-    $this->chain->set('test_cid_clear3', 'foo', Cache::PERMANENT, array('test_tag_foo:3'));
+    $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, ['test_tag:1']);
+    $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, ['test_tag:2']);
+    $this->chain->set('test_cid_clear3', 'foo', Cache::PERMANENT, ['test_tag_foo:3']);
     $this->assertNotSame(FALSE, $this->firstBackend->get('test_cid_clear1')
       && $this->firstBackend->get('test_cid_clear2')
       && $this->firstBackend->get('test_cid_clear3')
@@ -269,7 +269,7 @@ public function testDeleteTagsPropagation() {
       && $this->thirdBackend->get('test_cid_clear3'),
       'Three cached items were created in all backends.');
 
-    $this->chain->invalidateTags(array('test_tag_foo:3'));
+    $this->chain->invalidateTags(['test_tag_foo:3']);
     $this->assertNotSame(FALSE, $this->firstBackend->get('test_cid_clear1')
       && $this->firstBackend->get('test_cid_clear2')
       && $this->secondBackend->get('test_cid_clear1')
diff --git a/core/tests/Drupal/Tests/Core/Cache/CacheCollectorHelper.php b/core/tests/Drupal/Tests/Core/Cache/CacheCollectorHelper.php
index 238911b42eea91eec6299728e088cd5267aeb3e1..a44e8d4acd92a4be96db2248c4b98cf12407db98 100644
--- a/core/tests/Drupal/Tests/Core/Cache/CacheCollectorHelper.php
+++ b/core/tests/Drupal/Tests/Core/Cache/CacheCollectorHelper.php
@@ -13,7 +13,7 @@ class CacheCollectorHelper extends CacheCollector {
    * Contains data to return on a cache miss.
    * @var array
    */
-  protected $cacheMissData = array();
+  protected $cacheMissData = [];
 
   /**
    * Number of calls to \Drupal\Core\Cache\CacheCollector::resolveCacheMiss().
diff --git a/core/tests/Drupal/Tests/Core/Cache/CacheCollectorTest.php b/core/tests/Drupal/Tests/Core/Cache/CacheCollectorTest.php
index e0eeac72dfec9a0b9a64bd75c41d8cb712551da3..1ff662939ee64c83ae5f0a2b0d81c03e30e33119 100644
--- a/core/tests/Drupal/Tests/Core/Cache/CacheCollectorTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/CacheCollectorTest.php
@@ -114,10 +114,10 @@ public function testGetFromCache() {
     $key = $this->randomMachineName();
     $value = $this->randomMachineName();
 
-    $cache = (object) array(
-      'data' => array($key => $value),
+    $cache = (object) [
+      'data' => [$key => $value],
       'created' => (int) $_SERVER['REQUEST_TIME'],
-    );
+    ];
     $this->cacheBackend->expects($this->once())
       ->method('get')
       ->with($this->cid)
@@ -183,7 +183,7 @@ public function testUpdateCache() {
       ->with($this->cid, FALSE);
     $this->cacheBackend->expects($this->once())
       ->method('set')
-      ->with($this->cid, array($key => $value), Cache::PERMANENT, array());
+      ->with($this->cid, [$key => $value], Cache::PERMANENT, []);
     $this->lock->expects($this->once())
       ->method('release')
       ->with($this->cid . ':Drupal\Core\Cache\CacheCollector');
@@ -222,10 +222,10 @@ public function testUpdateCacheInvalidatedConflict() {
     $key = $this->randomMachineName();
     $value = $this->randomMachineName();
 
-    $cache = (object) array(
-      'data' => array($key => $value),
+    $cache = (object) [
+      'data' => [$key => $value],
       'created' => (int) $_SERVER['REQUEST_TIME'],
-    );
+    ];
     $this->cacheBackend->expects($this->at(0))
       ->method('get')
       ->with($this->cid)
@@ -243,10 +243,10 @@ public function testUpdateCacheInvalidatedConflict() {
       ->method('acquire')
       ->with($this->cid . ':Drupal\Core\Cache\CacheCollector')
       ->will($this->returnValue(TRUE));
-    $cache = (object) array(
-      'data' => array($key => $value),
+    $cache = (object) [
+      'data' => [$key => $value],
       'created' => (int) $_SERVER['REQUEST_TIME'] + 1,
-    );
+    ];
     $this->cacheBackend->expects($this->at(0))
       ->method('get')
       ->with($this->cid)
@@ -279,17 +279,17 @@ public function testUpdateCacheMerge() {
       ->method('acquire')
       ->with($this->cid . ':Drupal\Core\Cache\CacheCollector')
       ->will($this->returnValue(TRUE));
-    $cache = (object) array(
-      'data' => array('other key' => 'other value'),
+    $cache = (object) [
+      'data' => ['other key' => 'other value'],
       'created' => (int) $_SERVER['REQUEST_TIME'] + 1,
-    );
+    ];
     $this->cacheBackend->expects($this->at(0))
       ->method('get')
       ->with($this->cid)
       ->will($this->returnValue($cache));
     $this->cacheBackend->expects($this->once())
       ->method('set')
-      ->with($this->cid, array('other key' => 'other value', $key => $value), Cache::PERMANENT, array());
+      ->with($this->cid, ['other key' => 'other value', $key => $value], Cache::PERMANENT, []);
     $this->lock->expects($this->once())
       ->method('release')
       ->with($this->cid . ':Drupal\Core\Cache\CacheCollector');
@@ -305,10 +305,10 @@ public function testUpdateCacheDelete() {
     $key = $this->randomMachineName();
     $value = $this->randomMachineName();
 
-    $cache = (object) array(
-      'data' => array($key => $value),
+    $cache = (object) [
+      'data' => [$key => $value],
       'created' => (int) $_SERVER['REQUEST_TIME'],
-    );
+    ];
     $this->cacheBackend->expects($this->at(0))
       ->method('get')
       ->with($this->cid)
@@ -330,7 +330,7 @@ public function testUpdateCacheDelete() {
       ->with($this->cid, TRUE);
     $this->cacheBackend->expects($this->once())
       ->method('set')
-      ->with($this->cid, array(), Cache::PERMANENT, array());
+      ->with($this->cid, [], Cache::PERMANENT, []);
     $this->lock->expects($this->once())
       ->method('release')
       ->with($this->cid . ':Drupal\Core\Cache\CacheCollector');
@@ -392,7 +392,7 @@ public function testUpdateCacheClear() {
   public function testUpdateCacheClearTags() {
     $key = $this->randomMachineName();
     $value = $this->randomMachineName();
-    $tags = array($this->randomMachineName());
+    $tags = [$this->randomMachineName()];
     $this->collector = new CacheCollectorHelper($this->cid, $this->cacheBackend, $this->lock, $tags);
 
     // Set the data and request it.
diff --git a/core/tests/Drupal/Tests/Core/Cache/CacheFactoryTest.php b/core/tests/Drupal/Tests/Core/Cache/CacheFactoryTest.php
index be0fbdfbb5ca00dd0665075a28417d036814743d..0c43bb220275bbf8bafc872bf2a004a600c00738 100644
--- a/core/tests/Drupal/Tests/Core/Cache/CacheFactoryTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/CacheFactoryTest.php
@@ -20,7 +20,7 @@ class CacheFactoryTest extends UnitTestCase {
    * @covers ::get
    */
   public function testCacheFactoryWithDefaultSettings() {
-    $settings = new Settings(array());
+    $settings = new Settings([]);
     $cache_factory = new CacheFactory($settings);
 
     $container = new ContainerBuilder();
@@ -46,11 +46,11 @@ public function testCacheFactoryWithDefaultSettings() {
    * @covers ::get
    */
   public function testCacheFactoryWithCustomizedDefaultBackend() {
-    $settings = new Settings(array(
-      'cache' => array(
+    $settings = new Settings([
+      'cache' => [
         'default' => 'cache.backend.custom',
-      ),
-    ));
+      ],
+    ]);
     $cache_factory = new CacheFactory($settings);
 
     $container = new ContainerBuilder();
@@ -77,11 +77,11 @@ public function testCacheFactoryWithCustomizedDefaultBackend() {
    */
   public function testCacheFactoryWithDefaultBinBackend() {
     // Ensure the default bin backends are used before the configured default.
-    $settings = new Settings(array(
-      'cache' => array(
+    $settings = new Settings([
+      'cache' => [
         'default' => 'cache.backend.unused',
-      ),
-    ));
+      ],
+    ]);
 
     $default_bin_backends = [
       'render' => 'cache.backend.custom',
@@ -114,14 +114,14 @@ public function testCacheFactoryWithDefaultBinBackend() {
   public function testCacheFactoryWithSpecifiedPerBinBackend() {
     // Ensure the per-bin configuration is used before the configured default
     // and per-bin defaults.
-    $settings = new Settings(array(
-      'cache' => array(
+    $settings = new Settings([
+      'cache' => [
         'default' => 'cache.backend.unused',
-        'bins' => array(
+        'bins' => [
           'render' => 'cache.backend.custom',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
     $default_bin_backends = [
       'render' => 'cache.backend.unused',
diff --git a/core/tests/Drupal/Tests/Core/Cache/CacheTagsInvalidatorTest.php b/core/tests/Drupal/Tests/Core/Cache/CacheTagsInvalidatorTest.php
index edb220a9923744d7c497a75a94049591680722a4..3c41bdbe6b0d1c538a432447829e734d563e1d54 100644
--- a/core/tests/Drupal/Tests/Core/Cache/CacheTagsInvalidatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/CacheTagsInvalidatorTest.php
@@ -35,7 +35,7 @@ public function testInvalidateTags() {
     $invalidator_cache_bin = $this->getMock('\Drupal\Core\Cache\CacheTagsInvalidator');
     $invalidator_cache_bin->expects($this->once())
       ->method('invalidateTags')
-      ->with(array('node:1'));
+      ->with(['node:1']);
 
     // We do not have to define that invalidateTags() is never called as the
     // interface does not define that method, trying to call it would result in
@@ -45,17 +45,17 @@ public function testInvalidateTags() {
     $container = new Container();
     $container->set('cache.invalidator_cache_bin', $invalidator_cache_bin);
     $container->set('cache.non_invalidator_cache_bin', $non_invalidator_cache_bin);
-    $container->setParameter('cache_bins', array('cache.invalidator_cache_bin' => 'invalidator_cache_bin', 'cache.non_invalidator_cache_bin' => 'non_invalidator_cache_bin'));
+    $container->setParameter('cache_bins', ['cache.invalidator_cache_bin' => 'invalidator_cache_bin', 'cache.non_invalidator_cache_bin' => 'non_invalidator_cache_bin']);
     $cache_tags_invalidator->setContainer($container);
 
     $invalidator = $this->getMock('\Drupal\Core\Cache\CacheTagsInvalidator');
     $invalidator->expects($this->once())
       ->method('invalidateTags')
-      ->with(array('node:1'));
+      ->with(['node:1']);
 
     $cache_tags_invalidator->addInvalidator($invalidator);
 
-    $cache_tags_invalidator->invalidateTags(array('node:1'));
+    $cache_tags_invalidator->invalidateTags(['node:1']);
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Cache/ChainedFastBackendTest.php b/core/tests/Drupal/Tests/Core/Cache/ChainedFastBackendTest.php
index 93dbd9ffb67a6d340235f42e7d785c42777cfec4..52f18517466a38e78b4a7238d44cfe167798ca79 100644
--- a/core/tests/Drupal/Tests/Core/Cache/ChainedFastBackendTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/ChainedFastBackendTest.php
@@ -40,7 +40,7 @@ public function testGetDoesntHitConsistentBackend() {
     $consistent_cache = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
     $timestamp_cid = ChainedFastBackend::LAST_WRITE_TIMESTAMP_PREFIX . 'cache_foo';
     // Use the request time because that is what we will be comparing against.
-    $timestamp_item = (object) array('cid' => $timestamp_cid, 'data' => (int) $_SERVER['REQUEST_TIME'] - 60);
+    $timestamp_item = (object) ['cid' => $timestamp_cid, 'data' => (int) $_SERVER['REQUEST_TIME'] - 60];
     $consistent_cache->expects($this->once())
       ->method('get')->with($timestamp_cid)
       ->will($this->returnValue($timestamp_item));
@@ -62,17 +62,17 @@ public function testGetDoesntHitConsistentBackend() {
    * Tests a fast cache miss gets data from the consistent cache backend.
    */
   public function testFallThroughToConsistentCache() {
-    $timestamp_item = (object) array(
+    $timestamp_item = (object) [
       'cid' => ChainedFastBackend::LAST_WRITE_TIMESTAMP_PREFIX . 'cache_foo',
       'data' => time() + 60, // Time travel is easy.
-    );
-    $cache_item = (object) array(
+    ];
+    $cache_item = (object) [
       'cid' => 'foo',
       'data' => 'baz',
       'created' => time(),
       'expire' => time() + 3600,
       'tags' => ['tag'],
-    );
+    ];
 
     $consistent_cache = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
     $fast_cache = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
@@ -86,14 +86,14 @@ public function testFallThroughToConsistentCache() {
     // We should get a call for the cache item on the consistent backend.
     $consistent_cache->expects($this->once())
       ->method('getMultiple')
-      ->with(array($cache_item->cid))
-      ->will($this->returnValue(array($cache_item->cid => $cache_item)));
+      ->with([$cache_item->cid])
+      ->will($this->returnValue([$cache_item->cid => $cache_item]));
 
     // We should get a call for the cache item on the fast backend.
     $fast_cache->expects($this->once())
       ->method('getMultiple')
-      ->with(array($cache_item->cid))
-      ->will($this->returnValue(array($cache_item->cid => $cache_item)));
+      ->with([$cache_item->cid])
+      ->will($this->returnValue([$cache_item->cid => $cache_item]));
 
     // We should get a call to set the cache item on the fast backend.
     $fast_cache->expects($this->once())
diff --git a/core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php b/core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php
index 0bc9d7f1ba21e7caa3f3eab74a957ae4d3bc735a..e68dd9bc5575b166398800e4203f7dcaa591ba23 100644
--- a/core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php
@@ -142,19 +142,19 @@ public function providerTestInvalidCalculatedContext() {
   public function testAvailableContextStrings() {
     $cache_contexts_manager = new CacheContextsManager($this->getMockContainer(), $this->getContextsFixture());
     $contexts = $cache_contexts_manager->getAll();
-    $this->assertEquals(array("foo", "baz"), $contexts);
+    $this->assertEquals(["foo", "baz"], $contexts);
   }
 
   public function testAvailableContextLabels() {
     $container = $this->getMockContainer();
     $cache_contexts_manager = new CacheContextsManager($container, $this->getContextsFixture());
     $labels = $cache_contexts_manager->getLabels();
-    $expected = array("foo" => "Foo");
+    $expected = ["foo" => "Foo"];
     $this->assertEquals($expected, $labels);
   }
 
   protected function getContextsFixture() {
-    return array('foo', 'baz');
+    return ['foo', 'baz'];
   }
 
   protected function getMockContainer() {
diff --git a/core/tests/Drupal/Tests/Core/Common/AttributesTest.php b/core/tests/Drupal/Tests/Core/Common/AttributesTest.php
index 39d7fc1def5bb3f7fd9719c197ba90475ac0cd1d..1f7d9c8014d1b2b25447c02d06217d8e9e2e7f24 100644
--- a/core/tests/Drupal/Tests/Core/Common/AttributesTest.php
+++ b/core/tests/Drupal/Tests/Core/Common/AttributesTest.php
@@ -18,31 +18,31 @@ class AttributesTest extends UnitTestCase {
    * @return array
    */
   public function providerTestAttributeData() {
-    return array(
+    return [
       // Verify that special characters are HTML encoded.
-      array(array('&"\'<>' => 'value'), ' &amp;&quot;&#039;&lt;&gt;="value"', 'HTML encode attribute names.'),
-      array(array('title' => '&"\'<>'), ' title="&amp;&quot;&#039;&lt;&gt;"', 'HTML encode attribute values.'),
+      [['&"\'<>' => 'value'], ' &amp;&quot;&#039;&lt;&gt;="value"', 'HTML encode attribute names.'],
+      [['title' => '&"\'<>'], ' title="&amp;&quot;&#039;&lt;&gt;"', 'HTML encode attribute values.'],
       // Verify multi-value attributes are concatenated with spaces.
-      array(array('class' => array('first', 'last')), ' class="first last"', 'Concatenate multi-value attributes.'),
+      [['class' => ['first', 'last']], ' class="first last"', 'Concatenate multi-value attributes.'],
       // Verify boolean attribute values are rendered correctly.
-      array(array('disabled' => TRUE), ' disabled', 'Boolean attribute is rendered.'),
-      array(array('disabled' => FALSE), '', 'Boolean attribute is not rendered.'),
+      [['disabled' => TRUE], ' disabled', 'Boolean attribute is rendered.'],
+      [['disabled' => FALSE], '', 'Boolean attribute is not rendered.'],
       // Verify empty attribute values are rendered.
-      array(array('alt' => ''), ' alt=""', 'Empty attribute value #1.'),
-      array(array('alt' => NULL), '', 'Null attribute value #2.'),
+      [['alt' => ''], ' alt=""', 'Empty attribute value #1.'],
+      [['alt' => NULL], '', 'Null attribute value #2.'],
       // Verify multiple attributes are rendered.
-      array(
-        array(
+      [
+        [
           'id' => 'id-test',
-          'class' => array('first', 'last'),
+          'class' => ['first', 'last'],
           'alt' => 'Alternate',
-        ),
+        ],
         ' id="id-test" class="first last" alt="Alternate"',
         'Multiple attributes.'
-      ),
+      ],
       // Verify empty attributes array is rendered.
-      array(array(), '', 'Empty attributes array.'),
-    );
+      [[], '', 'Empty attributes array.'],
+    ];
   }
 
   /**
@@ -60,7 +60,7 @@ function testDrupalAttributes($attributes, $expected, $message) {
    * Test attribute iteration
    */
   public function testAttributeIteration() {
-    $attribute = new Attribute(array('key1' => 'value1'));
+    $attribute = new Attribute(['key1' => 'value1']);
     foreach ($attribute as $value) {
       $this->assertSame((string) $value, 'value1', 'Iterate over attribute.');
     }
diff --git a/core/tests/Drupal/Tests/Core/Common/DiffArrayTest.php b/core/tests/Drupal/Tests/Core/Common/DiffArrayTest.php
index 4112eaeb16e0e90523fb54e617cb1c1626b13ae4..2493ab511d57d6f51e2bf7a8f4fab9cb8e2a7032 100644
--- a/core/tests/Drupal/Tests/Core/Common/DiffArrayTest.php
+++ b/core/tests/Drupal/Tests/Core/Common/DiffArrayTest.php
@@ -29,42 +29,42 @@ class DiffArrayTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
 
-    $this->array1 = array(
+    $this->array1 = [
       'same' => 'yes',
       'different' => 'no',
-      'array_empty_diff' => array(),
+      'array_empty_diff' => [],
       'null' => NULL,
       'int_diff' => 1,
-      'array_diff' => array('same' => 'same', 'array' => array('same' => 'same')),
-      'array_compared_to_string' => array('value'),
+      'array_diff' => ['same' => 'same', 'array' => ['same' => 'same']],
+      'array_compared_to_string' => ['value'],
       'string_compared_to_array' => 'value',
       'new' => 'new',
-    );
-    $this->array2 = array(
+    ];
+    $this->array2 = [
       'same' => 'yes',
       'different' => 'yes',
-      'array_empty_diff' => array(),
+      'array_empty_diff' => [],
       'null' => NULL,
       'int_diff' => '1',
-      'array_diff' => array('same' => 'different', 'array' => array('same' => 'same')),
+      'array_diff' => ['same' => 'different', 'array' => ['same' => 'same']],
       'array_compared_to_string' => 'value',
-      'string_compared_to_array' => array('value'),
-    );
+      'string_compared_to_array' => ['value'],
+    ];
   }
 
   /**
    * Tests DiffArray::diffAssocRecursive().
    */
   public function testDiffAssocRecursive() {
-    $expected = array(
+    $expected = [
       'different' => 'no',
       'int_diff' => 1,
       // The 'array' key should not be returned, as it's the same.
-      'array_diff' => array('same' => 'same'),
-      'array_compared_to_string' => array('value'),
+      'array_diff' => ['same' => 'same'],
+      'array_compared_to_string' => ['value'],
       'string_compared_to_array' => 'value',
       'new' => 'new',
-    );
+    ];
 
     $this->assertSame(DiffArray::diffAssocRecursive($this->array1, $this->array2), $expected);
   }
diff --git a/core/tests/Drupal/Tests/Core/Common/TagsTest.php b/core/tests/Drupal/Tests/Core/Common/TagsTest.php
index 48d788a8fefb738212a38e5e0c059db83421e58b..3c3058f9655b41b5666bfca70a0d90f5e6caa853 100644
--- a/core/tests/Drupal/Tests/Core/Common/TagsTest.php
+++ b/core/tests/Drupal/Tests/Core/Common/TagsTest.php
@@ -12,12 +12,12 @@
  */
 class TagsTest extends UnitTestCase {
 
-  protected $validTags = array(
+  protected $validTags = [
     'Drupal' => 'Drupal',
     'Drupal with some spaces' => 'Drupal with some spaces',
     '"Legendary Drupal mascot of doom: ""Druplicon"""' => 'Legendary Drupal mascot of doom: "Druplicon"',
     '"Drupal, although it rhymes with sloopal, is as awesome as a troopal!"' => 'Drupal, although it rhymes with sloopal, is as awesome as a troopal!',
-  );
+  ];
 
   /**
    * Explodes a series of tags.
diff --git a/core/tests/Drupal/Tests/Core/Condition/ConditionAccessResolverTraitTest.php b/core/tests/Drupal/Tests/Core/Condition/ConditionAccessResolverTraitTest.php
index 241ea38c0adf03a403e25735b560431fcc6eb28f..f0da231409998689636778c840183864b75f144a 100644
--- a/core/tests/Drupal/Tests/Core/Condition/ConditionAccessResolverTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Condition/ConditionAccessResolverTraitTest.php
@@ -29,7 +29,7 @@ public function testResolveConditions($conditions, $logic, $expected) {
   }
 
   public function providerTestResolveConditions() {
-    $data = array();
+    $data = [];
 
     $condition_true = $this->getMock('Drupal\Core\Condition\ConditionInterface');
     $condition_true->expects($this->any())
@@ -54,49 +54,49 @@ public function providerTestResolveConditions() {
       ->method('isNegated')
       ->will($this->returnValue(TRUE));
 
-    $conditions = array();
-    $data[] = array($conditions, 'and', TRUE);
-    $data[] = array($conditions, 'or', FALSE);
+    $conditions = [];
+    $data[] = [$conditions, 'and', TRUE];
+    $data[] = [$conditions, 'or', FALSE];
 
-    $conditions = array($condition_false);
-    $data[] = array($conditions, 'or', FALSE);
-    $data[] = array($conditions, 'and', FALSE);
+    $conditions = [$condition_false];
+    $data[] = [$conditions, 'or', FALSE];
+    $data[] = [$conditions, 'and', FALSE];
 
-    $conditions = array($condition_true);
-    $data[] = array($conditions, 'or', TRUE);
-    $data[] = array($conditions, 'and', TRUE);
+    $conditions = [$condition_true];
+    $data[] = [$conditions, 'or', TRUE];
+    $data[] = [$conditions, 'and', TRUE];
 
-    $conditions = array($condition_true, $condition_false);
-    $data[] = array($conditions, 'or', TRUE);
-    $data[] = array($conditions, 'and', FALSE);
+    $conditions = [$condition_true, $condition_false];
+    $data[] = [$conditions, 'or', TRUE];
+    $data[] = [$conditions, 'and', FALSE];
 
-    $conditions = array($condition_exception);
-    $data[] = array($conditions, 'or', FALSE);
-    $data[] = array($conditions, 'and', FALSE);
+    $conditions = [$condition_exception];
+    $data[] = [$conditions, 'or', FALSE];
+    $data[] = [$conditions, 'and', FALSE];
 
-    $conditions = array($condition_true, $condition_exception);
-    $data[] = array($conditions, 'or', TRUE);
-    $data[] = array($conditions, 'and', FALSE);
+    $conditions = [$condition_true, $condition_exception];
+    $data[] = [$conditions, 'or', TRUE];
+    $data[] = [$conditions, 'and', FALSE];
 
-    $conditions = array($condition_exception, $condition_true);
-    $data[] = array($conditions, 'or', TRUE);
-    $data[] = array($conditions, 'and', FALSE);
+    $conditions = [$condition_exception, $condition_true];
+    $data[] = [$conditions, 'or', TRUE];
+    $data[] = [$conditions, 'and', FALSE];
 
-    $conditions = array($condition_false, $condition_exception);
-    $data[] = array($conditions, 'or', FALSE);
-    $data[] = array($conditions, 'and', FALSE);
+    $conditions = [$condition_false, $condition_exception];
+    $data[] = [$conditions, 'or', FALSE];
+    $data[] = [$conditions, 'and', FALSE];
 
-    $conditions = array($condition_exception, $condition_false);
-    $data[] = array($conditions, 'or', FALSE);
-    $data[] = array($conditions, 'and', FALSE);
+    $conditions = [$condition_exception, $condition_false];
+    $data[] = [$conditions, 'or', FALSE];
+    $data[] = [$conditions, 'and', FALSE];
 
-    $conditions = array($condition_negated);
-    $data[] = array($conditions, 'or', TRUE);
-    $data[] = array($conditions, 'and', TRUE);
+    $conditions = [$condition_negated];
+    $data[] = [$conditions, 'or', TRUE];
+    $data[] = [$conditions, 'and', TRUE];
 
-    $conditions = array($condition_negated, $condition_negated);
-    $data[] = array($conditions, 'or', TRUE);
-    $data[] = array($conditions, 'and', TRUE);
+    $conditions = [$condition_negated, $condition_negated];
+    $data[] = [$conditions, 'or', TRUE];
+    $data[] = [$conditions, 'and', TRUE];
     return $data;
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Config/CachedStorageTest.php b/core/tests/Drupal/Tests/Core/Config/CachedStorageTest.php
index 1a4c2db4a1aa5ab3280d2cfa03e2c5d992a02abf..c39efd6249160a0c3b37daf3ba9b9e977a9e6a7b 100644
--- a/core/tests/Drupal/Tests/Core/Config/CachedStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/CachedStorageTest.php
@@ -25,7 +25,7 @@ public function testListAllStaticCache() {
     $prefix = __FUNCTION__;
     $storage = $this->getMock('Drupal\Core\Config\StorageInterface');
 
-    $response = array("$prefix." . $this->randomMachineName(), "$prefix." . $this->randomMachineName());
+    $response = ["$prefix." . $this->randomMachineName(), "$prefix." . $this->randomMachineName()];
     $storage->expects($this->once())
       ->method('listAll')
       ->with($prefix)
diff --git a/core/tests/Drupal/Tests/Core/Config/ConfigTest.php b/core/tests/Drupal/Tests/Core/Config/ConfigTest.php
index 223d8903e06ca77036f975f363f94de8fdb36ea0..ef1db218013e224e799fd2b8468d7dec2a381b7b 100644
--- a/core/tests/Drupal/Tests/Core/Config/ConfigTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/ConfigTest.php
@@ -87,16 +87,16 @@ public function testSetName($name) {
    * @see \Drupal\Tests\Core\Config\ConfigTest::testSetName()
    */
   public function setNameProvider() {
-    return array(
+    return [
       // Valid name with dot.
-      array(
+      [
         'test.name',
-      ),
+      ],
       // Maximum length.
-      array(
+      [
         'test.' . str_repeat('a', Config::MAX_NAME_LENGTH - 5),
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -233,7 +233,7 @@ public function testSetValue($data) {
    * @expectedException \Drupal\Core\Config\ConfigValueException
    */
   public function testSetValidation() {
-    $this->config->set('testData', array('dot.key' => 1));
+    $this->config->set('testData', ['dot.key' => 1]);
   }
 
   /**
@@ -369,16 +369,16 @@ public function testMerge($data, $data_to_merge, $merged_data) {
    * @see \Drupal\Tests\Core\Config\ConfigTest::testMerge()
    */
   public function mergeDataProvider() {
-    return array(
-      array(
+    return [
+      [
         // Data.
-        array('a' => 1, 'b' => 2, 'c' => array('d' => 3)),
+        ['a' => 1, 'b' => 2, 'c' => ['d' => 3]],
         // Data to merge.
-        array('a' => 2, 'e' => 4, 'c' => array('f' => 5)),
+        ['a' => 2, 'e' => 4, 'c' => ['f' => 5]],
         // Data merged.
-        array('a' => 2, 'b' => 2, 'c' => array('d' => 3, 'f' => 5), 'e' => 4),
-      ),
-    );
+        ['a' => 2, 'b' => 2, 'c' => ['d' => 3, 'f' => 5], 'e' => 4],
+      ],
+    ];
   }
 
   /**
@@ -404,25 +404,25 @@ public function testGetCacheTags() {
    * @see \Drupal\Tests\Core\Config\ConfigTest::testValidateNameException()
    */
   public function validateNameProvider() {
-    $return = array(
+    $return = [
       // Name missing namespace (dot).
-      array(
+      [
         'MissingNamespace',
         'Missing namespace in Config object name MissingNamespace.',
-      ),
+      ],
       // Exceeds length (max length plus an extra dot).
-      array(
+      [
         str_repeat('a', Config::MAX_NAME_LENGTH) . ".",
         'Config object name ' . str_repeat('a', Config::MAX_NAME_LENGTH) . '. exceeds maximum allowed length of ' . Config::MAX_NAME_LENGTH . ' characters.',
-      ),
-    );
+      ],
+    ];
     // Name must not contain : ? * < > " ' / \
-    foreach (array(':', '?', '*', '<', '>', '"', "'", '/', '\\') as $char) {
+    foreach ([':', '?', '*', '<', '>', '"', "'", '/', '\\'] as $char) {
       $name = 'name.' . $char;
-      $return[] = array(
+      $return[] = [
         $name,
         "Invalid character in Config object name $name.",
-      );
+      ];
     }
     return $return;
   }
@@ -434,22 +434,22 @@ public function validateNameProvider() {
    * @see \Drupal\Tests\Core\Config\ConfigTest::testDelete()
    */
   public function overrideDataProvider() {
-    return array(
-      array(
+    return [
+      [
         // Original data.
-        array(
+        [
           'a' => 'originalValue',
-        ),
+        ],
         // Module overrides.
-        array(
+        [
           'a' => 'moduleValue',
-        ),
+        ],
         // Setting overrides.
-        array(
+        [
           'a' => 'settingValue',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -458,15 +458,15 @@ public function overrideDataProvider() {
    * @see \Drupal\Tests\Core\Config\ConfigTest::testClear()
    */
   public function simpleDataProvider() {
-    return array(
-      array(
-        array(
+    return [
+      [
+        [
           'a' => '1',
           'b' => '2',
           'c' => '3',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -479,21 +479,21 @@ public function simpleDataProvider() {
    * @see \Drupal\Tests\Core\Config\ConfigTest::testNestedClear()
    */
   public function nestedDataProvider() {
-    return array(
-      array(
-        array(
-          'a' => array(
+    return [
+      [
+        [
+          'a' => [
             'd' => 1,
-          ),
-          'b' => array(
+          ],
+          'b' => [
             'e' => 2,
-          ),
-          'c' => array(
+          ],
+          'c' => [
             'f' => 3,
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigDependencyManagerTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigDependencyManagerTest.php
index 0c3f14dbde5ce811b614bbeb9c7c9fdef2d9b36b..9f058d56f3614c06a15c4bde788cede7674c2cb1 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigDependencyManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigDependencyManagerTest.php
@@ -19,11 +19,11 @@ public function testNoConfiguration() {
 
   public function testNoConfigEntities() {
     $dep_manger = new ConfigDependencyManager();
-    $dep_manger->setData(array(
-      'simple.config' => array(
+    $dep_manger->setData([
+      'simple.config' => [
         'key' => 'value',
-      ),
-    ));
+      ],
+    ]);
     $this->assertEmpty($dep_manger->getDependentEntities('config', 'config_test.dynamic.entity_id:745b0ce0-aece-42dd-a800-ade5b8455e84'));
 
     // Configuration is always dependent on its provider.
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php
index 4710765dd029e5090143547e11d63fe634c6fe31..171f2d36c4aca29a8c3addf50b7809a745dcdb35 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php
@@ -96,11 +96,11 @@ class ConfigEntityBaseUnitTest extends UnitTestCase {
    */
   protected function setUp() {
     $this->id = $this->randomMachineName();
-    $values = array(
+    $values = [
       'id' => $this->id,
       'langcode' => 'en',
       'uuid' => '3bb9ee60-bea5-4622-b89b-a63319d10b3a',
-    );
+    ];
     $this->entityTypeId = $this->randomMachineName();
     $this->provider = $this->randomMachineName();
     $this->entityType = $this->getMock('\Drupal\Core\Config\Entity\ConfigEntityTypeInterface');
@@ -123,7 +123,7 @@ protected function setUp() {
     $this->languageManager->expects($this->any())
       ->method('getLanguage')
       ->with('en')
-      ->will($this->returnValue(new Language(array('id' => 'en'))));
+      ->will($this->returnValue(new Language(['id' => 'en'])));
 
     $this->cacheTagsInvalidator = $this->getMock('Drupal\Core\Cache\CacheTagsInvalidatorInterface');
 
@@ -137,7 +137,7 @@ protected function setUp() {
     $container->set('config.typed', $this->typedConfigManager);
     \Drupal::setContainer($container);
 
-    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Config\Entity\ConfigEntityBase', array($values, $this->entityTypeId));
+    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Config\Entity\ConfigEntityBase', [$values, $this->entityTypeId]);
   }
 
   /**
@@ -146,12 +146,12 @@ protected function setUp() {
    */
   public function testCalculateDependencies() {
     // Calculating dependencies will reset the dependencies array.
-    $this->entity->set('dependencies', array('module' => array('node')));
+    $this->entity->set('dependencies', ['module' => ['node']]);
     $this->assertEmpty($this->entity->calculateDependencies()->getDependencies());
 
     // Calculating dependencies will reset the dependencies array using enforced
     // dependencies.
-    $this->entity->set('dependencies', array('module' => array('node'), 'enforced' => array('module' => 'views')));
+    $this->entity->set('dependencies', ['module' => ['node'], 'enforced' => ['module' => 'views']]);
     $dependencies = $this->entity->calculateDependencies()->getDependencies();
     $this->assertContains('views', $dependencies['module']);
     $this->assertNotContains('node', $dependencies['module']);
@@ -166,7 +166,7 @@ public function testPreSaveDuringSync() {
 
     $query->expects($this->any())
       ->method('execute')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $query->expects($this->any())
       ->method('condition')
       ->will($this->returnValue($query));
@@ -179,12 +179,12 @@ public function testPreSaveDuringSync() {
 
     // Saving an entity will not reset the dependencies array during config
     // synchronization.
-    $this->entity->set('dependencies', array('module' => array('node')));
+    $this->entity->set('dependencies', ['module' => ['node']]);
     $this->entity->preSave($storage);
     $this->assertEmpty($this->entity->getDependencies());
 
     $this->entity->setSyncing(TRUE);
-    $this->entity->set('dependencies', array('module' => array('node')));
+    $this->entity->set('dependencies', ['module' => ['node']]);
     $this->entity->preSave($storage);
     $dependencies = $this->entity->getDependencies();
     $this->assertContains('node', $dependencies['module']);
@@ -207,12 +207,12 @@ public function testAddDependency() {
     // Test sorting of dependencies.
     $method->invoke($this->entity, 'module', 'action');
     $dependencies = $this->entity->getDependencies();
-    $this->assertEquals(array('action', 'node'), $dependencies['module']);
+    $this->assertEquals(['action', 'node'], $dependencies['module']);
 
     // Test sorting of dependency types.
     $method->invoke($this->entity, 'entity', 'system.action.id');
     $dependencies = $this->entity->getDependencies();
-    $this->assertEquals(array('entity', 'module'), array_keys($dependencies));
+    $this->assertEquals(['entity', 'module'], array_keys($dependencies));
   }
 
   /**
@@ -222,20 +222,20 @@ public function testAddDependency() {
    * @dataProvider providerCalculateDependenciesWithPluginCollections
    */
   public function testCalculateDependenciesWithPluginCollections($definition, $expected_dependencies) {
-    $values = array();
+    $values = [];
     $this->entity = $this->getMockBuilder('\Drupal\Tests\Core\Config\Entity\Fixtures\ConfigEntityBaseWithPluginCollections')
-      ->setConstructorArgs(array($values, $this->entityTypeId))
-      ->setMethods(array('getPluginCollections'))
+      ->setConstructorArgs([$values, $this->entityTypeId])
+      ->setMethods(['getPluginCollections'])
       ->getMock();
 
     // Create a configurable plugin that would add a dependency.
     $instance_id = $this->randomMachineName();
-    $instance = new TestConfigurablePlugin(array(), $instance_id, $definition);
+    $instance = new TestConfigurablePlugin([], $instance_id, $definition);
 
     // Create a plugin collection to contain the instance.
     $pluginCollection = $this->getMockBuilder('\Drupal\Core\Plugin\DefaultLazyPluginCollection')
       ->disableOriginalConstructor()
-      ->setMethods(array('get'))
+      ->setMethods(['get'])
       ->getMock();
     $pluginCollection->expects($this->atLeastOnce())
       ->method('get')
@@ -246,7 +246,7 @@ public function testCalculateDependenciesWithPluginCollections($definition, $exp
     // Return the mocked plugin collection.
     $this->entity->expects($this->once())
       ->method('getPluginCollections')
-      ->will($this->returnValue(array($pluginCollection)));
+      ->will($this->returnValue([$pluginCollection]));
 
     $this->assertEquals($expected_dependencies, $this->entity->calculateDependencies()->getDependencies());
   }
@@ -261,34 +261,34 @@ public function providerCalculateDependenciesWithPluginCollections() {
     $instance_dependency_1 = 'a' . $this->randomMachineName(10);
     $instance_dependency_2 = 'a' . $this->randomMachineName(11);
 
-    return array(
+    return [
       // Tests that the plugin provider is a module dependency.
-      array(
-        array('provider' => 'test'),
-        array('module' => array('test')),
-      ),
+      [
+        ['provider' => 'test'],
+        ['module' => ['test']],
+      ],
       // Tests that a plugin that is provided by the same module as the config
       // entity is not added to the dependencies array.
-      array(
-        array('provider' => $this->provider),
-        array('module' => array(NULL)),
-      ),
+      [
+        ['provider' => $this->provider],
+        ['module' => [NULL]],
+      ],
       // Tests that a config entity that has a plugin which provides config
       // dependencies in its definition has them.
-      array(
-        array(
+      [
+        [
           'provider' => 'test',
-          'config_dependencies' => array(
-            'config' => array($instance_dependency_1),
-            'module' => array($instance_dependency_2),
-          )
-        ),
-        array(
-          'config' => array($instance_dependency_1),
-          'module' => array($instance_dependency_2, 'test')
-        )
-      )
-    );
+          'config_dependencies' => [
+            'config' => [$instance_dependency_1],
+            'module' => [$instance_dependency_2],
+          ]
+        ],
+        [
+          'config' => [$instance_dependency_1],
+          'module' => [$instance_dependency_2, 'test']
+        ]
+      ]
+    ];
   }
 
   /**
@@ -297,17 +297,17 @@ public function providerCalculateDependenciesWithPluginCollections() {
    * @covers ::onDependencyRemoval
    */
   public function testCalculateDependenciesWithThirdPartySettings() {
-    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Config\Entity\ConfigEntityBase', array(array(), $this->entityTypeId));
+    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Config\Entity\ConfigEntityBase', [[], $this->entityTypeId]);
     $this->entity->setThirdPartySetting('test_provider', 'test', 'test');
     $this->entity->setThirdPartySetting('test_provider2', 'test', 'test');
     $this->entity->setThirdPartySetting($this->provider, 'test', 'test');
 
-    $this->assertEquals(array('test_provider', 'test_provider2'), $this->entity->calculateDependencies()->getDependencies()['module']);
+    $this->assertEquals(['test_provider', 'test_provider2'], $this->entity->calculateDependencies()->getDependencies()['module']);
     $changed = $this->entity->onDependencyRemoval(['module' => ['test_provider2']]);
     $this->assertTrue($changed, 'Calling onDependencyRemoval with an existing third party dependency provider returns TRUE.');
     $changed = $this->entity->onDependencyRemoval(['module' => ['test_provider3']]);
     $this->assertFalse($changed, 'Calling onDependencyRemoval with a non-existing third party dependency provider returns FALSE.');
-    $this->assertEquals(array('test_provider'), $this->entity->calculateDependencies()->getDependencies()['module']);
+    $this->assertEquals(['test_provider'], $this->entity->calculateDependencies()->getDependencies()['module']);
   }
 
   /**
@@ -470,11 +470,11 @@ public function testSort() {
     $this->entityManager->expects($this->any())
       ->method('getDefinition')
       ->with($this->entityTypeId)
-      ->will($this->returnValue(array(
-        'entity_keys' => array(
+      ->will($this->returnValue([
+        'entity_keys' => [
           'label' => 'label',
-        ),
-      )));
+        ],
+      ]));
 
     $entity_a = $this->getMock('\Drupal\Core\Config\Entity\ConfigEntityInterface');
     $entity_a->expects($this->atLeastOnce())
@@ -486,12 +486,12 @@ public function testSort() {
       ->willReturn('bar');
 
     // Test sorting by label.
-    $list = array($entity_a, $entity_b);
+    $list = [$entity_a, $entity_b];
     // Suppress errors because of https://bugs.php.net/bug.php?id=50688.
     @usort($list, '\Drupal\Core\Config\Entity\ConfigEntityBase::sort');
     $this->assertSame($entity_b, $list[0]);
 
-    $list = array($entity_b, $entity_a);
+    $list = [$entity_b, $entity_a];
     // Suppress errors because of https://bugs.php.net/bug.php?id=50688.
     @usort($list, '\Drupal\Core\Config\Entity\ConfigEntityBase::sort');
     $this->assertSame($entity_b, $list[0]);
@@ -499,12 +499,12 @@ public function testSort() {
     // Test sorting by weight.
     $entity_a->weight = 0;
     $entity_b->weight = 1;
-    $list = array($entity_b, $entity_a);
+    $list = [$entity_b, $entity_a];
     // Suppress errors because of https://bugs.php.net/bug.php?id=50688.
     @usort($list, '\Drupal\Core\Config\Entity\ConfigEntityBase::sort');
     $this->assertSame($entity_a, $list[0]);
 
-    $list = array($entity_a, $entity_b);
+    $list = [$entity_a, $entity_b];
     // Suppress errors because of https://bugs.php.net/bug.php?id=50688.
     @usort($list, '\Drupal\Core\Config\Entity\ConfigEntityBase::sort');
     $this->assertSame($entity_a, $list[0]);
@@ -521,7 +521,7 @@ public function testToArray() {
       ->willReturn(['id' => 'configId', 'dependencies' => 'dependencies']);
     $properties = $this->entity->toArray();
     $this->assertInternalType('array', $properties);
-    $this->assertEquals(array('configId' => $this->entity->id(), 'dependencies' => array()), $properties);
+    $this->assertEquals(['configId' => $this->entity->id(), 'dependencies' => []], $properties);
   }
 
   /**
@@ -556,13 +556,13 @@ public function testToArrayIdKey() {
   public function testToArraySchemaFallback() {
     $this->typedConfigManager->expects($this->once())
       ->method('getDefinition')
-      ->will($this->returnValue(array('mapping' => array('id' => '', 'dependencies' => ''))));
+      ->will($this->returnValue(['mapping' => ['id' => '', 'dependencies' => '']]));
     $this->entityType->expects($this->any())
       ->method('getPropertiesToExport')
       ->willReturn([]);
     $properties = $this->entity->toArray();
     $this->assertInternalType('array', $properties);
-    $this->assertEquals(array('id' => $this->entity->id(), 'dependencies' => array()), $properties);
+    $this->assertEquals(['id' => $this->entity->id(), 'dependencies' => []], $properties);
   }
 
   /**
@@ -600,15 +600,15 @@ public function testThirdPartySettings() {
 
     // Test getThirdPartySettings().
     $this->entity->setThirdPartySetting($third_party, 'test2', 'value2');
-    $this->assertEquals(array($key => $value, 'test2' => 'value2'), $this->entity->getThirdPartySettings($third_party));
+    $this->assertEquals([$key => $value, 'test2' => 'value2'], $this->entity->getThirdPartySettings($third_party));
 
     // Test getThirdPartyProviders().
     $this->entity->setThirdPartySetting('test_provider2', $key, $value);
-    $this->assertEquals(array($third_party, 'test_provider2'), $this->entity->getThirdPartyProviders());
+    $this->assertEquals([$third_party, 'test_provider2'], $this->entity->getThirdPartyProviders());
 
     // Test unsetThirdPartyProviders().
     $this->entity->unsetThirdPartySetting('test_provider2', $key);
-    $this->assertEquals(array($third_party), $this->entity->getThirdPartyProviders());
+    $this->assertEquals([$third_party], $this->entity->getThirdPartyProviders());
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityDependencyTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityDependencyTest.php
index 5d617ce0c75a237e1439181db1ceab188efb739d..7bcbc97cc998ac63667dda87d961a11459e04b6a 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityDependencyTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityDependencyTest.php
@@ -13,34 +13,34 @@
 class ConfigEntityDependencyTest extends UnitTestCase {
 
   public function testEmptyDependencies() {
-    $dep = new ConfigEntityDependency('config_test.dynamic.entity_id', array());
+    $dep = new ConfigEntityDependency('config_test.dynamic.entity_id', []);
 
     $this->assertEquals('config_test.dynamic.entity_id', $dep->getConfigDependencyName());
-    $this->assertEquals(array(), $dep->getDependencies('theme'));
-    $this->assertEquals(array(), $dep->getDependencies('config'));
-    $this->assertEquals(array('config_test'), $dep->getDependencies('module'));
+    $this->assertEquals([], $dep->getDependencies('theme'));
+    $this->assertEquals([], $dep->getDependencies('config'));
+    $this->assertEquals(['config_test'], $dep->getDependencies('module'));
     $this->assertTrue($dep->hasDependency('module', 'config_test'));
     $this->assertFalse($dep->hasDependency('module', 'views'));
   }
 
   public function testWithDependencies() {
-    $values = array(
+    $values = [
       'uuid' => '60db47f4-54fb-4c86-a439-5769fbda4bd1',
-      'dependencies' => array(
-        'module' => array(
+      'dependencies' => [
+        'module' => [
           'node',
           'views'
-        ),
-        'config' => array(
+        ],
+        'config' => [
           'config_test.dynamic.entity_id:745b0ce0-aece-42dd-a800-ade5b8455e84',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
     $dep = new ConfigEntityDependency('config_test.dynamic.entity_id', $values);
 
-    $this->assertEquals(array(), $dep->getDependencies('theme'));
-    $this->assertEquals(array('config_test.dynamic.entity_id:745b0ce0-aece-42dd-a800-ade5b8455e84'), $dep->getDependencies('config'));
-    $this->assertEquals(array('node', 'views', 'config_test'), $dep->getDependencies('module'));
+    $this->assertEquals([], $dep->getDependencies('theme'));
+    $this->assertEquals(['config_test.dynamic.entity_id:745b0ce0-aece-42dd-a800-ade5b8455e84'], $dep->getDependencies('config'));
+    $this->assertEquals(['node', 'views', 'config_test'], $dep->getDependencies('module'));
     $this->assertTrue($dep->hasDependency('module', 'config_test'));
     $this->assertTrue($dep->hasDependency('module', 'views'));
     $this->assertTrue($dep->hasDependency('module', 'node'));
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php
index 62310a1901bfda8066a1de26de23e6d17af43014..230b0856b5d83ed8a4f1418f831f1fb0296770aa 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php
@@ -177,7 +177,7 @@ public function testCreateWithPredefinedUuid() {
 
     $this->uuidService->generate()->shouldNotBeCalled();
 
-    $entity = $this->entityStorage->create(array('id' => 'foo', 'uuid' => 'baz'));
+    $entity = $this->entityStorage->create(['id' => 'foo', 'uuid' => 'baz']);
     $this->assertInstanceOf(EntityInterface::class, $entity);
     $this->assertSame('foo', $entity->id());
     $this->assertSame('baz', $entity->uuid());
@@ -206,7 +206,7 @@ public function testCreate() {
 
     $this->uuidService->generate()->willReturn('bar');
 
-    $entity = $this->entityStorage->create(array('id' => 'foo'));
+    $entity = $this->entityStorage->create(['id' => 'foo']);
     $this->assertInstanceOf(EntityInterface::class, $entity);
     $this->assertSame('foo', $entity->id());
     $this->assertSame('bar', $entity->uuid());
@@ -220,7 +220,7 @@ public function testCreate() {
   public function testCreateWithCurrentLanguage() {
     $this->languageManager->getLanguage('hu')->willReturn(new Language(['id' => 'hu']));
 
-    $entity = $this->entityStorage->create(array('id' => 'foo'));
+    $entity = $this->entityStorage->create(['id' => 'foo']);
     $this->assertSame('hu', $entity->language()->getId());
   }
 
@@ -231,7 +231,7 @@ public function testCreateWithCurrentLanguage() {
   public function testCreateWithExplicitLanguage() {
     $this->languageManager->getLanguage('en')->willReturn(new Language(['id' => 'en']));
 
-    $entity = $this->entityStorage->create(array('id' => 'foo', 'langcode' => 'en'));
+    $entity = $this->entityStorage->create(['id' => 'foo', 'langcode' => 'en']);
     $this->assertSame('en', $entity->language()->getId());
   }
 
@@ -404,7 +404,7 @@ public function testSaveDuplicate() {
     $this->configFactory->get('the_provider.the_config_prefix.foo')
       ->willReturn($config_object->reveal());
 
-    $entity = $this->getMockEntity(array('id' => 'foo'));
+    $entity = $this->getMockEntity(['id' => 'foo']);
     $entity->enforceIsNew();
 
     $this->entityStorage->save($entity);
@@ -430,7 +430,7 @@ public function testSaveMismatch() {
     $this->entityQuery->condition('uuid', NULL)->willReturn($this->entityQuery);
     $this->entityQuery->execute()->willReturn(['baz']);
 
-    $entity = $this->getMockEntity(array('id' => 'foo'));
+    $entity = $this->getMockEntity(['id' => 'foo']);
     $this->entityStorage->save($entity);
   }
 
@@ -463,7 +463,7 @@ public function testSaveNoMismatch() {
     $this->entityQuery->condition('uuid', NULL)->willReturn($this->entityQuery);
     $this->entityQuery->execute()->willReturn(['baz']);
 
-    $entity = $this->getMockEntity(array('id' => 'foo'));
+    $entity = $this->getMockEntity(['id' => 'foo']);
     $entity->setOriginalId('baz');
     $entity->enforceIsNew();
     $this->entityStorage->save($entity);
@@ -501,7 +501,7 @@ public function testSaveChangedUuid() {
     $this->entityQuery->condition('uuid', 'baz')->willReturn($this->entityQuery);
     $this->entityQuery->execute()->willReturn(['foo']);
 
-    $entity = $this->getMockEntity(array('id' => 'foo'));
+    $entity = $this->getMockEntity(['id' => 'foo']);
 
     $entity->set('uuid', 'baz');
     $this->entityStorage->save($entity);
@@ -595,7 +595,7 @@ public function testLoadMultipleIds() {
     $this->moduleHandler->getImplementations('entity_load')->willReturn([]);
     $this->moduleHandler->getImplementations('test_entity_type_load')->willReturn([]);
 
-    $entities = $this->entityStorage->loadMultiple(array('foo'));
+    $entities = $this->entityStorage->loadMultiple(['foo']);
     $this->assertContainsOnlyInstancesOf(EntityInterface::class, $entities);
     foreach ($entities as $id => $entity) {
       $this->assertSame($id, $entity->id());
@@ -633,9 +633,9 @@ public function testDelete() {
       ->getConfigEntitiesToChangeOnDependencyRemoval('config', ['the_provider.the_config_prefix.bar'], FALSE)
       ->willReturn(['update' => [], 'delete' => [], 'unchanged' => []]);
 
-    $entities = array();
-    foreach (array('foo', 'bar') as $id) {
-      $entity = $this->getMockEntity(array('id' => $id));
+    $entities = [];
+    foreach (['foo', 'bar'] as $id) {
+      $entity = $this->getMockEntity(['id' => $id]);
       $entities[] = $entity;
 
       $config_object = $this->prophesize(Config::class);
@@ -674,7 +674,7 @@ public function testDeleteNothing() {
 
     $this->cacheTagsInvalidator->invalidateTags(Argument::cetera())->shouldNotBeCalled();
 
-    $this->entityStorage->delete(array());
+    $this->entityStorage->delete([]);
   }
 
   /**
@@ -687,7 +687,7 @@ public function testDeleteNothing() {
    *
    * @return \Drupal\Core\Entity\EntityInterface|\PHPUnit_Framework_MockObject_MockObject
    */
-  public function getMockEntity(array $values = array(), $methods = array()) {
+  public function getMockEntity(array $values = [], $methods = []) {
     return $this->getMockForAbstractClass(ConfigEntityBase::class, [$values, 'test_entity_type'], '', TRUE, TRUE, TRUE, $methods);
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
index b131b26a15d78aa5a724658424e05fb2beae897a..928cebc15327e6bf080c40fe9722dfc60346a458 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
@@ -21,9 +21,9 @@ class ConfigEntityTypeTest extends UnitTestCase {
    */
   protected function setUpConfigEntityType($definition) {
     if (!isset($definition['id'])) {
-      $definition += array(
+      $definition += [
         'id' => 'example_config_entity_type',
-      );
+      ];
     }
     return new ConfigEntityType($definition);
   }
@@ -37,10 +37,10 @@ protected function setUpConfigEntityType($definition) {
   public function testConfigPrefixLengthExceeds() {
     // A provider length of 24 and config_prefix length of 59 (+1 for the .)
     // results in a config length of 84, which is too long.
-    $definition = array(
+    $definition = [
       'provider' => $this->randomMachineName(24),
       'config_prefix' => $this->randomMachineName(59),
-    );
+    ];
     $config_entity = $this->setUpConfigEntityType($definition);
     $this->setExpectedException(
       '\Drupal\Core\Config\ConfigPrefixLengthException',
@@ -58,10 +58,10 @@ public function testConfigPrefixLengthExceeds() {
   public function testConfigPrefixLengthValid() {
     // A provider length of 24 and config_prefix length of 58 (+1 for the .)
     // results in a config length of 83, which is right at the limit.
-    $definition = array(
+    $definition = [
       'provider' => $this->randomMachineName(24),
       'config_prefix' => $this->randomMachineName(58),
-    );
+    ];
     $config_entity = $this->setUpConfigEntityType($definition);
     $expected_prefix = $definition['provider'] . '.' . $definition['config_prefix'];
     $this->assertEquals($expected_prefix, $config_entity->getConfigPrefix());
@@ -117,10 +117,10 @@ public function testGetConfigPrefix($definition, $expected) {
    * Provides test data.
    */
   public function providerTestGetConfigPrefix() {
-    return array(
-      array(array('provider' => 'node', 'id' => 'node_type', 'config_prefix' => 'type'), 'node.type'),
-      array(array('provider' => 'views', 'id' => 'view'), 'views.view'),
-    );
+    return [
+      [['provider' => 'node', 'id' => 'node_type', 'config_prefix' => 'type'], 'node.type'],
+      [['provider' => 'views', 'id' => 'view'], 'views.view'],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/EntityDisplayModeBaseUnitTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/EntityDisplayModeBaseUnitTest.php
index 2a0b126da0fe31c953aca852e921aa23c06cd91b..728fdca457fdcbe794ec86847b6c1da3c1adedfc 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/EntityDisplayModeBaseUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/EntityDisplayModeBaseUnitTest.php
@@ -77,7 +77,7 @@ public function testCalculateDependencies() {
     $target_entity_type->expects($this->any())
       ->method('getProvider')
       ->will($this->returnValue('test_module'));
-    $values = array('targetEntityType' => $target_entity_type_id);
+    $values = ['targetEntityType' => $target_entity_type_id];
 
     $this->entityManager->expects($this->at(0))
       ->method('getDefinition')
@@ -89,8 +89,8 @@ public function testCalculateDependencies() {
       ->will($this->returnValue($this->entityInfo));
 
     $this->entity = $this->getMockBuilder('\Drupal\Core\Entity\EntityDisplayModeBase')
-      ->setConstructorArgs(array($values, $this->entityType))
-      ->setMethods(array('getFilterFormat'))
+      ->setConstructorArgs([$values, $this->entityType])
+      ->setMethods(['getFilterFormat'])
       ->getMock();
 
     $dependencies = $this->entity->calculateDependencies()->getDependencies();
@@ -105,7 +105,7 @@ public function testSetTargetType() {
     $mock = $this->getMock(
       'Drupal\Core\Entity\EntityDisplayModeBase',
       NULL,
-      array(array('something' => 'nothing'), 'test_type')
+      [['something' => 'nothing'], 'test_type']
     );
 
     // Some test values.
@@ -134,7 +134,7 @@ public function testGetTargetType() {
     $mock = $this->getMock(
       'Drupal\Core\Entity\EntityDisplayModeBase',
       NULL,
-      array(array('something' => 'nothing'), 'test_type')
+      [['something' => 'nothing'], 'test_type']
     );
 
     // A test value.
diff --git a/core/tests/Drupal/Tests/Core/Config/StorageComparerTest.php b/core/tests/Drupal/Tests/Core/Config/StorageComparerTest.php
index e339af7b8af7dc549605291c668069951919f879..fc0d63bede3d2407a946381bff07a4510750970f 100644
--- a/core/tests/Drupal/Tests/Core/Config/StorageComparerTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/StorageComparerTest.php
@@ -51,48 +51,48 @@ protected function setUp() {
   protected function getConfigData() {
     $uuid = new Php();
     // Mock data using minimal data to use ConfigDependencyManger.
-    $this->configData = array(
+    $this->configData = [
       // Simple config that controls configuration sync.
-      'system.site' => array(
+      'system.site' => [
         'title' => 'Drupal',
         'uuid' => $uuid->generate(),
-      ),
+      ],
       // Config entity which requires another config entity.
-      'field.field.node.article.body' => array(
+      'field.field.node.article.body' => [
         'id' => 'node.article.body',
         'uuid' => $uuid->generate(),
-        'dependencies' => array(
-          'config' => array(
+        'dependencies' => [
+          'config' => [
             'field.storage.node.body'
-          ),
-        ),
-      ),
+          ],
+        ],
+      ],
       // Config entity which is required by another config entity.
-      'field.storage.node.body' => array(
+      'field.storage.node.body' => [
         'id' => 'node.body',
         'uuid' => $uuid->generate(),
-        'dependencies' => array(
-          'module' => array(
+        'dependencies' => [
+          'module' => [
             'text',
-          ),
-        ),
-      ),
+          ],
+        ],
+      ],
       // Config entity not which has no dependencies on configuration.
-      'views.view.test_view' => array(
+      'views.view.test_view' => [
         'id' => 'test_view',
         'uuid' => $uuid->generate(),
-        'dependencies' => array(
-          'module' => array(
+        'dependencies' => [
+          'module' => [
             'node',
-          ),
-        ),
-      ),
+          ],
+        ],
+      ],
       // Simple config.
-      'system.performance' => array(
+      'system.performance' => [
         'stale_file_threshold' => 2592000
-      ),
+      ],
 
-    );
+    ];
     return $this->configData;
   }
 
@@ -116,10 +116,10 @@ public function testCreateChangelistNoChange() {
       ->will($this->returnValue($config_data));
     $this->sourceStorage->expects($this->once())
       ->method('getAllCollectionNames')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->targetStorage->expects($this->once())
       ->method('getAllCollectionNames')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->storageComparer->createChangelist();
     $this->assertEmpty($this->storageComparer->getChangelist('create'));
@@ -150,17 +150,17 @@ public function testCreateChangelistCreate() {
       ->will($this->returnValue($target_data));
     $this->sourceStorage->expects($this->once())
       ->method('getAllCollectionNames')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->targetStorage->expects($this->once())
       ->method('getAllCollectionNames')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->storageComparer->createChangelist();
-    $expected = array(
+    $expected = [
       'field.storage.node.body',
       'field.field.node.article.body',
       'views.view.test_view',
-    );
+    ];
     $this->assertEquals($expected, $this->storageComparer->getChangelist('create'));
     $this->assertEmpty($this->storageComparer->getChangelist('delete'));
     $this->assertEmpty($this->storageComparer->getChangelist('update'));
@@ -189,17 +189,17 @@ public function testCreateChangelistDelete() {
       ->will($this->returnValue($target_data));
     $this->sourceStorage->expects($this->once())
       ->method('getAllCollectionNames')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->targetStorage->expects($this->once())
       ->method('getAllCollectionNames')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->storageComparer->createChangelist();
-    $expected = array(
+    $expected = [
       'views.view.test_view',
       'field.field.node.article.body',
       'field.storage.node.body',
-    );
+    ];
     $this->assertEquals($expected, $this->storageComparer->getChangelist('delete'));
     $this->assertEmpty($this->storageComparer->getChangelist('create'));
     $this->assertEmpty($this->storageComparer->getChangelist('update'));
@@ -228,17 +228,17 @@ public function testCreateChangelistUpdate() {
       ->will($this->returnValue($target_data));
     $this->sourceStorage->expects($this->once())
       ->method('getAllCollectionNames')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->targetStorage->expects($this->once())
       ->method('getAllCollectionNames')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->storageComparer->createChangelist();
-    $expected = array(
+    $expected = [
       'field.storage.node.body',
       'field.field.node.article.body',
       'system.site',
-    );
+    ];
     $this->assertEquals($expected, $this->storageComparer->getChangelist('update'));
     $this->assertEmpty($this->storageComparer->getChangelist('create'));
     $this->assertEmpty($this->storageComparer->getChangelist('delete'));
diff --git a/core/tests/Drupal/Tests/Core/Controller/AjaxRendererTest.php b/core/tests/Drupal/Tests/Core/Controller/AjaxRendererTest.php
index 9dfc690dff4e5966962565f11a9a64567332602b..3d42dec4a55059f50de66d3c29f9dca21d02fb39 100644
--- a/core/tests/Drupal/Tests/Core/Controller/AjaxRendererTest.php
+++ b/core/tests/Drupal/Tests/Core/Controller/AjaxRendererTest.php
@@ -42,7 +42,7 @@ protected function setUp() {
       ->with('ajax')
       ->willReturn([
         '#header' => TRUE,
-        '#commands' => array(),
+        '#commands' => [],
         '#error' => NULL,
       ]);
     $this->ajaxRenderer = new TestAjaxRenderer($element_info_manager);
diff --git a/core/tests/Drupal/Tests/Core/Controller/ControllerBaseTest.php b/core/tests/Drupal/Tests/Core/Controller/ControllerBaseTest.php
index 9bcb6b524e1a9992bac0f7a45820fa3904a4d7f8..3f55f1510b439d71f2f9b49ad4d81c447ae3dc53 100644
--- a/core/tests/Drupal/Tests/Core/Controller/ControllerBaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Controller/ControllerBaseTest.php
@@ -26,14 +26,14 @@ protected function setUp() {
    * Tests the config method.
    */
   public function testGetConfig() {
-    $config_factory = $this->getConfigFactoryStub(array(
-      'config_name' => array(
+    $config_factory = $this->getConfigFactoryStub([
+      'config_name' => [
         'key' => 'value',
-      ),
-      'config_name2' => array(
+      ],
+      'config_name2' => [
         'key2' => 'value2',
-      ),
-    ));
+      ],
+    ]);
 
     $container = $this->getMock('Symfony\Component\DependencyInjection\ContainerInterface');
     $container->expects($this->once())
diff --git a/core/tests/Drupal/Tests/Core/Controller/ControllerResolverTest.php b/core/tests/Drupal/Tests/Core/Controller/ControllerResolverTest.php
index 98a18a354783551f25216979e42fe5520bfcd5bb..ef9c0761b2d6024d24044ab7949d143c22983af3 100644
--- a/core/tests/Drupal/Tests/Core/Controller/ControllerResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Controller/ControllerResolverTest.php
@@ -78,11 +78,11 @@ public function testGetArguments() {
       ->disableOriginalConstructor()
       ->getMock();
     $mock_account = $this->getMock('Drupal\Core\Session\AccountInterface');
-    $request = new Request(array(), array(), array(
+    $request = new Request([], [], [
       'entity' => $mock_entity,
       'user' => $mock_account,
-      '_raw_variables' => new ParameterBag(array('entity' => 1, 'user' => 1)),
-    ), array(), array(), array('HTTP_HOST' => 'drupal.org'));
+      '_raw_variables' => new ParameterBag(['entity' => 1, 'user' => 1]),
+    ], [], [], ['HTTP_HOST' => 'drupal.org']);
     $arguments = $this->controllerResolver->getArguments($request, $controller);
 
     $this->assertEquals($mock_entity, $arguments[0]);
@@ -106,16 +106,16 @@ public function testCreateController($controller, $class, $output) {
    * Provides test data for testCreateController().
    */
   public function providerTestCreateController() {
-    return array(
+    return [
       // Tests class::method.
-      array('Drupal\Tests\Core\Controller\MockController::getResult', 'Drupal\Tests\Core\Controller\MockController', 'This is a regular controller.'),
+      ['Drupal\Tests\Core\Controller\MockController::getResult', 'Drupal\Tests\Core\Controller\MockController', 'This is a regular controller.'],
       // Tests service:method.
-      array('some_service:getResult', 'Drupal\Tests\Core\Controller\MockController', 'This is a regular controller.'),
+      ['some_service:getResult', 'Drupal\Tests\Core\Controller\MockController', 'This is a regular controller.'],
       // Tests a class with injection.
-      array('Drupal\Tests\Core\Controller\MockContainerInjection::getResult', 'Drupal\Tests\Core\Controller\MockContainerInjection', 'This used injection.'),
+      ['Drupal\Tests\Core\Controller\MockContainerInjection::getResult', 'Drupal\Tests\Core\Controller\MockContainerInjection', 'This used injection.'],
       // Tests a ContainerAware class.
-      array('Drupal\Tests\Core\Controller\MockContainerAware::getResult', 'Drupal\Tests\Core\Controller\MockContainerAware', 'This is container aware.'),
-    );
+      ['Drupal\Tests\Core\Controller\MockContainerAware::getResult', 'Drupal\Tests\Core\Controller\MockContainerAware', 'This is container aware.'],
+    ];
   }
 
   /**
@@ -142,7 +142,7 @@ public function testCreateControllerInvalidName() {
    * @dataProvider providerTestGetController
    */
   public function testGetController($attributes, $class, $output = NULL) {
-    $request = new Request(array(), array(), $attributes);
+    $request = new Request([], [], $attributes);
     $result = $this->controllerResolver->getController($request);
     if ($class) {
       $this->assertCallableController($result, $class, $output);
@@ -156,12 +156,12 @@ public function testGetController($attributes, $class, $output = NULL) {
    * Provides test data for testGetController().
    */
   public function providerTestGetController() {
-    return array(
+    return [
       // Tests passing a controller via the request.
-      array(array('_controller' => 'Drupal\Tests\Core\Controller\MockContainerAware::getResult'), 'Drupal\Tests\Core\Controller\MockContainerAware', 'This is container aware.'),
+      [['_controller' => 'Drupal\Tests\Core\Controller\MockContainerAware::getResult'], 'Drupal\Tests\Core\Controller\MockContainerAware', 'This is container aware.'],
       // Tests a request with no controller specified.
-      array(array(), FALSE)
-    );
+      [[], FALSE]
+    ];
   }
 
   /**
@@ -178,16 +178,16 @@ public function testGetControllerFromDefinition($definition, $output) {
    * Provides test data for testGetControllerFromDefinition().
    */
   public function providerTestGetControllerFromDefinition() {
-    return array(
+    return [
       // Tests a method on an object.
-      array(array(new MockController(), 'getResult'), 'This is a regular controller.'),
+      [[new MockController(), 'getResult'], 'This is a regular controller.'],
       // Tests a function.
-      array('phpversion', phpversion()),
+      ['phpversion', phpversion()],
       // Tests an object using __invoke().
-      array(new MockInvokeController(), 'This used __invoke().'),
+      [new MockInvokeController(), 'This used __invoke().'],
       // Tests a class using __invoke().
-      array('Drupal\Tests\Core\Controller\MockInvokeController', 'This used __invoke().'),
-    );
+      ['Drupal\Tests\Core\Controller\MockInvokeController', 'This used __invoke().'],
+    ];
   }
   /**
    * Tests getControllerFromDefinition() without a callable.
diff --git a/core/tests/Drupal/Tests/Core/Controller/TitleResolverTest.php b/core/tests/Drupal/Tests/Core/Controller/TitleResolverTest.php
index e2fca4b8fa87cb19f4fae3eff88c66e9e938ca45..7633f78a133c1a8ed034775471d1b204612f0acf 100644
--- a/core/tests/Drupal/Tests/Core/Controller/TitleResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Controller/TitleResolverTest.php
@@ -55,8 +55,8 @@ protected function setUp() {
    */
   public function testStaticTitle() {
     $request = new Request();
-    $route = new Route('/test-route', array('_title' => 'static title'));
-    $this->assertEquals(new TranslatableMarkup('static title', array(), array(), $this->translationManager), $this->titleResolver->getTitle($request, $route));
+    $route = new Route('/test-route', ['_title' => 'static title']);
+    $this->assertEquals(new TranslatableMarkup('static title', [], [], $this->translationManager), $this->titleResolver->getTitle($request, $route));
   }
 
   /**
@@ -66,8 +66,8 @@ public function testStaticTitle() {
    */
   public function testStaticTitleWithContext() {
     $request = new Request();
-    $route = new Route('/test-route', array('_title' => 'static title', '_title_context' => 'context'));
-    $this->assertEquals(new TranslatableMarkup('static title', array(), array('context' => 'context'), $this->translationManager), $this->titleResolver->getTitle($request, $route));
+    $route = new Route('/test-route', ['_title' => 'static title', '_title_context' => 'context']);
+    $this->assertEquals(new TranslatableMarkup('static title', [], ['context' => 'context'], $this->translationManager), $this->titleResolver->getTitle($request, $route));
   }
 
   /**
@@ -78,20 +78,20 @@ public function testStaticTitleWithContext() {
    * @dataProvider providerTestStaticTitleWithParameter
    */
   public function testStaticTitleWithParameter($title, $expected_title) {
-    $raw_variables = new ParameterBag(array('test' => 'value', 'test2' => 'value2'));
+    $raw_variables = new ParameterBag(['test' => 'value', 'test2' => 'value2']);
     $request = new Request();
     $request->attributes->set('_raw_variables', $raw_variables);
 
-    $route = new Route('/test-route', array('_title' => $title));
+    $route = new Route('/test-route', ['_title' => $title]);
     $this->assertEquals($expected_title, $this->titleResolver->getTitle($request, $route));
   }
 
   public function providerTestStaticTitleWithParameter() {
     $translation_manager = $this->getMock('\Drupal\Core\StringTranslation\TranslationInterface');
-    return array(
-      array('static title @test', new TranslatableMarkup('static title @test', ['@test' => 'value', '%test' => 'value', '@test2' => 'value2', '%test2' => 'value2'], array(), $translation_manager)),
-      array('static title %test', new TranslatableMarkup('static title %test', ['@test' => 'value', '%test' => 'value', '@test2' => 'value2', '%test2' => 'value2'], array(), $translation_manager)),
-    );
+    return [
+      ['static title @test', new TranslatableMarkup('static title @test', ['@test' => 'value', '%test' => 'value', '@test2' => 'value2', '%test2' => 'value2'], [], $translation_manager)],
+      ['static title %test', new TranslatableMarkup('static title %test', ['@test' => 'value', '%test' => 'value', '@test2' => 'value2', '%test2' => 'value2'], [], $translation_manager)],
+    ];
   }
 
   /**
@@ -101,9 +101,9 @@ public function providerTestStaticTitleWithParameter() {
    */
   public function testDynamicTitle() {
     $request = new Request();
-    $route = new Route('/test-route', array('_title' => 'static title', '_title_callback' => 'Drupal\Tests\Core\Controller\TitleCallback::example'));
+    $route = new Route('/test-route', ['_title' => 'static title', '_title_callback' => 'Drupal\Tests\Core\Controller\TitleCallback::example']);
 
-    $callable = array(new TitleCallback(), 'example');
+    $callable = [new TitleCallback(), 'example'];
     $this->controllerResolver->expects($this->once())
       ->method('getControllerFromDefinition')
       ->with('Drupal\Tests\Core\Controller\TitleCallback::example')
@@ -111,7 +111,7 @@ public function testDynamicTitle() {
     $this->controllerResolver->expects($this->once())
       ->method('getArguments')
       ->with($request, $callable)
-      ->will($this->returnValue(array('example')));
+      ->will($this->returnValue(['example']));
 
     $this->assertEquals('test example', $this->titleResolver->getTitle($request, $route));
   }
diff --git a/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php b/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
index 8f4aa7ae29ce5b4130522b558d40f758bfec7c74..e4558470287d4f3a6ff8ec1691732814d5cc9a5d 100644
--- a/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
@@ -21,22 +21,22 @@ class ConnectionTest extends UnitTestCase {
    *   - Expected result from Connection::tablePrefix().
    */
   public function providerPrefixRoundTrip() {
-    return array(
-      array(
-        array('' => 'test_'),
+    return [
+      [
+        ['' => 'test_'],
         'test_',
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           'fooTable' => 'foo_',
           'barTable' => 'bar_',
-        ),
-        array(
+        ],
+        [
           'fooTable' => 'foo_',
           'barTable' => 'bar_',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -46,7 +46,7 @@ public function providerPrefixRoundTrip() {
    */
   public function testPrefixRoundTrip($expected, $prefix_info) {
     $mock_pdo = $this->getMock('Drupal\Tests\Core\Database\Stub\StubPDO');
-    $connection = new StubConnection($mock_pdo, array());
+    $connection = new StubConnection($mock_pdo, []);
 
     // setPrefix() is protected, so we make it accessible with reflection.
     $reflection = new \ReflectionClass('Drupal\Tests\Core\Database\Stub\StubConnection');
@@ -54,7 +54,7 @@ public function testPrefixRoundTrip($expected, $prefix_info) {
     $set_prefix->setAccessible(TRUE);
 
     // Set the prefix data.
-    $set_prefix->invokeArgs($connection, array($prefix_info));
+    $set_prefix->invokeArgs($connection, [$prefix_info]);
     // Check the round-trip.
     foreach ($expected as $table => $prefix) {
       $this->assertEquals($prefix, $connection->tablePrefix($table));
@@ -71,21 +71,21 @@ public function testPrefixRoundTrip($expected, $prefix_info) {
    *   - Query to be prefixed.
    */
   public function providerTestPrefixTables() {
-    return array(
-      array(
+    return [
+      [
         'SELECT * FROM test_table',
         'test_',
         'SELECT * FROM {table}',
-      ),
-      array(
+      ],
+      [
         'SELECT * FROM first_table JOIN second_thingie',
-        array(
+        [
           'table' => 'first_',
           'thingie' => 'second_',
-        ),
+        ],
         'SELECT * FROM {table} JOIN {thingie}',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -95,7 +95,7 @@ public function providerTestPrefixTables() {
    */
   public function testPrefixTables($expected, $prefix_info, $query) {
     $mock_pdo = $this->getMock('Drupal\Tests\Core\Database\Stub\StubPDO');
-    $connection = new StubConnection($mock_pdo, array('prefix' => $prefix_info));
+    $connection = new StubConnection($mock_pdo, ['prefix' => $prefix_info]);
     $this->assertEquals($expected, $connection->prefixTables($query));
   }
 
@@ -108,14 +108,14 @@ public function testPrefixTables($expected, $prefix_info, $query) {
    *   - String to escape.
    */
   public function providerEscapeMethods() {
-    return array(
-      array('thing', 'thing'),
-      array('_item', '_item'),
-      array('item_', 'item_'),
-      array('_item_', '_item_'),
-      array('', '!@#$%^&*()-=+'),
-      array('123', '!1@2#3'),
-    );
+    return [
+      ['thing', 'thing'],
+      ['_item', '_item'],
+      ['item_', 'item_'],
+      ['_item_', '_item_'],
+      ['', '!@#$%^&*()-=+'],
+      ['123', '!1@2#3'],
+    ];
   }
 
   /**
@@ -129,7 +129,7 @@ public function providerEscapeMethods() {
    */
   public function testEscapeMethods($expected, $name) {
     $mock_pdo = $this->getMock('Drupal\Tests\Core\Database\Stub\StubPDO');
-    $connection = new StubConnection($mock_pdo, array());
+    $connection = new StubConnection($mock_pdo, []);
     $this->assertEquals($expected, $connection->escapeDatabase($name));
     $this->assertEquals($expected, $connection->escapeTable($name));
     $this->assertEquals($expected, $connection->escapeField($name));
@@ -147,23 +147,23 @@ public function testEscapeMethods($expected, $name) {
    *   - Class name without namespace.
    */
   public function providerGetDriverClass() {
-    return array(
-      array(
+    return [
+      [
         'nonexistent_class',
         '\\',
         'nonexistent_class',
-      ),
-      array(
+      ],
+      [
         'Drupal\Tests\Core\Database\Stub\Select',
         NULL,
         'Select',
-      ),
-      array(
+      ],
+      [
         'Drupal\\Tests\\Core\\Database\\Stub\\Driver\\Schema',
         'Drupal\\Tests\\Core\\Database\\Stub\\Driver',
         'Schema',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -173,7 +173,7 @@ public function providerGetDriverClass() {
    */
   public function testGetDriverClass($expected, $namespace, $class) {
     $mock_pdo = $this->getMock('Drupal\Tests\Core\Database\Stub\StubPDO');
-    $connection = new StubConnection($mock_pdo, array('namespace' => $namespace));
+    $connection = new StubConnection($mock_pdo, ['namespace' => $namespace]);
     // Set the driver using our stub class' public property.
     $this->assertEquals($expected, $connection->getDriverClass($class));
   }
@@ -188,13 +188,13 @@ public function testGetDriverClass($expected, $namespace, $class) {
    *   - Namespace for connection.
    */
   public function providerSchema() {
-    return array(
-      array(
+    return [
+      [
         'Drupal\\Tests\\Core\\Database\\Stub\\Driver\\Schema',
         'stub',
         'Drupal\\Tests\\Core\\Database\\Stub\\Driver',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -204,7 +204,7 @@ public function providerSchema() {
    */
   public function testSchema($expected, $driver, $namespace) {
     $mock_pdo = $this->getMock('Drupal\Tests\Core\Database\Stub\StubPDO');
-    $connection = new StubConnection($mock_pdo, array('namespace' => $namespace));
+    $connection = new StubConnection($mock_pdo, ['namespace' => $namespace]);
     $connection->driver = $driver;
     $this->assertInstanceOf($expected, $connection->schema());
   }
@@ -218,7 +218,7 @@ public function testDestroy() {
     $connection = $this->getMock(
       'Drupal\Tests\Core\Database\Stub\StubConnection',
       NULL,
-      array($mock_pdo, array('namespace' => 'Drupal\\Tests\\Core\\Database\\Stub\\Driver'))
+      [$mock_pdo, ['namespace' => 'Drupal\\Tests\\Core\\Database\\Stub\\Driver']]
     );
     // Generate a schema object in order to verify that we've NULLed it later.
     $this->assertInstanceOf(
@@ -238,20 +238,20 @@ public function testDestroy() {
    *   - Arguments for Connection::makeComment().
    */
   public function providerMakeComments() {
-    return array(
-      array(
+    return [
+      [
         '/*  */ ',
-        array(''),
-      ),
-      array(
+        [''],
+      ],
+      [
         '/* Exploit  *  / DROP TABLE node. -- */ ',
-        array('Exploit * / DROP TABLE node; --'),
-      ),
-      array(
+        ['Exploit * / DROP TABLE node; --'],
+      ],
+      [
         '/* Exploit  *  / DROP TABLE node. --. another comment */ ',
-        array('Exploit * / DROP TABLE node; --', 'another comment'),
-      ),
-    );
+        ['Exploit * / DROP TABLE node; --', 'another comment'],
+      ],
+    ];
   }
 
   /**
@@ -261,7 +261,7 @@ public function providerMakeComments() {
    */
   public function testMakeComments($expected, $comment_array) {
     $mock_pdo = $this->getMock('Drupal\Tests\Core\Database\Stub\StubPDO');
-    $connection = new StubConnection($mock_pdo, array());
+    $connection = new StubConnection($mock_pdo, []);
     $this->assertEquals($expected, $connection->makeComment($comment_array));
   }
 
@@ -274,11 +274,11 @@ public function testMakeComments($expected, $comment_array) {
    *   - Comment to filter.
    */
   public function providerFilterComments() {
-    return array(
-      array('', ''),
-      array('Exploit  *  / DROP TABLE node. --', 'Exploit * / DROP TABLE node; --'),
-      array('Exploit  * / DROP TABLE node. --', 'Exploit */ DROP TABLE node; --'),
-    );
+    return [
+      ['', ''],
+      ['Exploit  *  / DROP TABLE node. --', 'Exploit * / DROP TABLE node; --'],
+      ['Exploit  * / DROP TABLE node. --', 'Exploit */ DROP TABLE node; --'],
+    ];
   }
 
   /**
@@ -288,7 +288,7 @@ public function providerFilterComments() {
    */
   public function testFilterComments($expected, $comment) {
     $mock_pdo = $this->getMock('Drupal\Tests\Core\Database\Stub\StubPDO');
-    $connection = new StubConnection($mock_pdo, array());
+    $connection = new StubConnection($mock_pdo, []);
 
     // filterComment() is protected, so we make it accessible with reflection.
     $reflection = new \ReflectionClass('Drupal\Tests\Core\Database\Stub\StubConnection');
@@ -297,7 +297,7 @@ public function testFilterComments($expected, $comment) {
 
     $this->assertEquals(
       $expected,
-      $filter_comment->invokeArgs($connection, array($comment))
+      $filter_comment->invokeArgs($connection, [$comment])
     );
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Database/Driver/pgsql/PostgresqlConnectionTest.php b/core/tests/Drupal/Tests/Core/Database/Driver/pgsql/PostgresqlConnectionTest.php
index 23f2386876ff1c5b430eda812bb4e2b4dc314f75..b55ddbb85fddabe7bfb741bfc233cfa1f40a3853 100644
--- a/core/tests/Drupal/Tests/Core/Database/Driver/pgsql/PostgresqlConnectionTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/Driver/pgsql/PostgresqlConnectionTest.php
@@ -35,17 +35,17 @@ protected function setUp() {
    *   value is the value to test.
    */
   public function providerEscapeTables() {
-    return array(
-      array('nocase', 'nocase'),
-      array('"camelCase"', 'camelCase'),
-      array('"camelCase"', '"camelCase"'),
-      array('"camelCase"', 'camel/Case'),
+    return [
+      ['nocase', 'nocase'],
+      ['"camelCase"', 'camelCase'],
+      ['"camelCase"', '"camelCase"'],
+      ['"camelCase"', 'camel/Case'],
       // Sometimes, table names are following the pattern database.schema.table.
-      array('"camelCase".nocase.nocase', 'camelCase.nocase.nocase'),
-      array('nocase."camelCase".nocase', 'nocase.camelCase.nocase'),
-      array('nocase.nocase."camelCase"', 'nocase.nocase.camelCase'),
-      array('"camelCase"."camelCase"."camelCase"', 'camelCase.camelCase.camelCase'),
-    );
+      ['"camelCase".nocase.nocase', 'camelCase.nocase.nocase'],
+      ['nocase."camelCase".nocase', 'nocase.camelCase.nocase'],
+      ['nocase.nocase."camelCase"', 'nocase.nocase.camelCase'],
+      ['"camelCase"."camelCase"."camelCase"', 'camelCase.camelCase.camelCase'],
+    ];
   }
 
   /**
@@ -57,12 +57,12 @@ public function providerEscapeTables() {
    *   - String to escape.
    */
   public function providerEscapeAlias() {
-    return array(
-      array('nocase', 'nocase'),
-      array('"camelCase"', '"camelCase"'),
-      array('"camelCase"', 'camelCase'),
-      array('"camelCase"', 'camel.Case'),
-    );
+    return [
+      ['nocase', 'nocase'],
+      ['"camelCase"', '"camelCase"'],
+      ['"camelCase"', 'camelCase'],
+      ['"camelCase"', 'camel.Case'],
+    ];
   }
 
   /**
@@ -74,16 +74,16 @@ public function providerEscapeAlias() {
    *   - String to escape.
    */
   public function providerEscapeFields() {
-    return array(
-      array('title', 'title'),
-      array('"isDefaultRevision"', 'isDefaultRevision'),
-      array('"isDefaultRevision"', '"isDefaultRevision"'),
-      array('entity_test."isDefaultRevision"', 'entity_test.isDefaultRevision'),
-      array('entity_test."isDefaultRevision"', '"entity_test"."isDefaultRevision"'),
-      array('"entityTest"."isDefaultRevision"', '"entityTest"."isDefaultRevision"'),
-      array('"entityTest"."isDefaultRevision"', 'entityTest.isDefaultRevision'),
-      array('entity_test."isDefaultRevision"', 'entity_test.is.Default.Revision'),
-    );
+    return [
+      ['title', 'title'],
+      ['"isDefaultRevision"', 'isDefaultRevision'],
+      ['"isDefaultRevision"', '"isDefaultRevision"'],
+      ['entity_test."isDefaultRevision"', 'entity_test.isDefaultRevision'],
+      ['entity_test."isDefaultRevision"', '"entity_test"."isDefaultRevision"'],
+      ['"entityTest"."isDefaultRevision"', '"entityTest"."isDefaultRevision"'],
+      ['"entityTest"."isDefaultRevision"', 'entityTest.isDefaultRevision'],
+      ['entity_test."isDefaultRevision"', 'entity_test.is.Default.Revision'],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Database/EmptyStatementTest.php b/core/tests/Drupal/Tests/Core/Database/EmptyStatementTest.php
index 46b1cd75064cd5e6ec8b03da25103d41997b3dd4..f40ebe80ac7ad9e5c8ce1a6594ca721fbcec7c5f 100644
--- a/core/tests/Drupal/Tests/Core/Database/EmptyStatementTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/EmptyStatementTest.php
@@ -36,7 +36,7 @@ function testEmptyIteration() {
   function testEmptyFetchAll() {
     $result = new StatementEmpty();
 
-    $this->assertEquals($result->fetchAll(), array(), 'Empty array returned from empty result set.');
+    $this->assertEquals($result->fetchAll(), [], 'Empty array returned from empty result set.');
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Database/Stub/StubConnection.php b/core/tests/Drupal/Tests/Core/Database/Stub/StubConnection.php
index 7c9349740493f7f481e2dac1ff178e9b82fb7b4a..4692dffb8714b061ccd099a33e004abca3aaa0e6 100644
--- a/core/tests/Drupal/Tests/Core/Database/Stub/StubConnection.php
+++ b/core/tests/Drupal/Tests/Core/Database/Stub/StubConnection.php
@@ -23,14 +23,14 @@ class StubConnection extends Connection {
   /**
    * {@inheritdoc}
    */
-  public function queryRange($query, $from, $count, array $args = array(), array $options = array()) {
+  public function queryRange($query, $from, $count, array $args = [], array $options = []) {
     return new StatementEmpty();
   }
 
   /**
    * {@inheritdoc}
    */
-  public function queryTemporary($query, array $args = array(), array $options = array()) {
+  public function queryTemporary($query, array $args = [], array $options = []) {
     return '';
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Datetime/DateTest.php b/core/tests/Drupal/Tests/Core/Datetime/DateTest.php
index edf6d714e798c5ac8f4c3b270874481db1b29765..7dd8e193cb5eedbc9097a6f103cb07e797fa130d 100644
--- a/core/tests/Drupal/Tests/Core/Datetime/DateTest.php
+++ b/core/tests/Drupal/Tests/Core/Datetime/DateTest.php
@@ -114,33 +114,33 @@ public function testFormatInterval($interval, $granularity, $expected, $langcode
    * Provides some test data for the format interval test.
    */
   public function providerTestFormatInterval() {
-    $data = array(
+    $data = [
       // Checks for basic seconds.
-      array(1, 1, '1 sec'),
-      array(1, 2, '1 sec'),
-      array(2, 1, '2 sec'),
-      array(2, 2, '2 sec'),
+      [1, 1, '1 sec'],
+      [1, 2, '1 sec'],
+      [2, 1, '2 sec'],
+      [2, 2, '2 sec'],
       // Checks for minutes with seconds.
-      array(61, 1, '1 min'),
-      array(61, 2, '1 min 1 sec'),
-      array(62, 2, '1 min 2 sec'),
-      array(121, 1, '2 min'),
-      array(121, 2, '2 min 1 sec'),
+      [61, 1, '1 min'],
+      [61, 2, '1 min 1 sec'],
+      [62, 2, '1 min 2 sec'],
+      [121, 1, '2 min'],
+      [121, 2, '2 min 1 sec'],
       // Check for hours with minutes and seconds.
-      array(3601, 1, '1 hour'),
-      array(3601, 2, '1 hour'),
+      [3601, 1, '1 hour'],
+      [3601, 2, '1 hour'],
       // Check for higher units.
-      array(86401, 1, '1 day'),
-      array(604800, 1, '1 week'),
-      array(2592000 * 2, 1, '2 months'),
-      array(31536000 * 2, 1, '2 years'),
+      [86401, 1, '1 day'],
+      [604800, 1, '1 week'],
+      [2592000 * 2, 1, '2 months'],
+      [31536000 * 2, 1, '2 years'],
       // Check for a complicated one with months weeks and days.
-      array(2592000 * 2 + 604800 * 3 + 86400 * 4, 3, '2 months 3 weeks 4 days'),
+      [2592000 * 2 + 604800 * 3 + 86400 * 4, 3, '2 months 3 weeks 4 days'],
       // Check for the langcode.
-      array(61, 1, '1 min', 'xxx-lolspeak'),
+      [61, 1, '1 min', 'xxx-lolspeak'],
       // Check with an unspecified granularity.
-      array(61, NULL, '1 min 1 sec'),
-    );
+      [61, NULL, '1 min 1 sec'],
+    ];
 
     return $data;
   }
@@ -150,7 +150,7 @@ public function providerTestFormatInterval() {
    */
   public function testFormatIntervalZeroSecond() {
     $result = $this->dateFormatter->formatInterval(0, 1, 'xxx-lolspeak');
-    $this->assertEquals(new TranslatableMarkup('0 sec', array(), array('langcode' => 'xxx-lolspeak'), $this->stringTranslation), $result);
+    $this->assertEquals(new TranslatableMarkup('0 sec', [], ['langcode' => 'xxx-lolspeak'], $this->stringTranslation), $result);
   }
 
   /**
@@ -181,7 +181,7 @@ public function testFormatTimeDiffUntil() {
     $expected = '1 second';
     $request_time = $this->createTimestamp('2013-12-11 10:09:08');
     $timestamp = $this->createTimestamp('2013-12-11 10:09:09');
-    $options = array();
+    $options = [];
 
     // Mocks the formatDiff function of the dateformatter object.
     $this->dateFormatterStub
@@ -218,7 +218,7 @@ public function testFormatTimeDiffSince() {
     $expected = '1 second';
     $timestamp = $this->createTimestamp('2013-12-11 10:09:07');
     $request_time = $this->createTimestamp('2013-12-11 10:09:08');
-    $options = array();
+    $options = [];
 
     // Mocks the formatDiff function of the dateformatter object.
     $this->dateFormatterStub
@@ -253,7 +253,7 @@ public function testFormatTimeDiffSince() {
    *
    * @covers ::formatDiff
    */
-  public function testformatDiff($expected, $max_age, $timestamp1, $timestamp2, $options = array()) {
+  public function testformatDiff($expected, $max_age, $timestamp1, $timestamp2, $options = []) {
     // Mocks a simple translateString implementation.
     $this->stringTranslation->expects($this->any())
       ->method('translateString')
@@ -281,114 +281,114 @@ public function providerTestFormatDiff() {
     // This is the fixed request time in the test.
     $request_time = $this->createTimestamp('2013-12-11 10:09:08');
 
-    $granularity_3 = array('granularity' => 3);
-    $granularity_4 = array('granularity' => 4);
+    $granularity_3 = ['granularity' => 3];
+    $granularity_4 = ['granularity' => 4];
 
-    $langcode_en = array('langcode' => 'en');
-    $langcode_lolspeak = array('langcode' => 'xxx-lolspeak');
+    $langcode_en = ['langcode' => 'en'];
+    $langcode_lolspeak = ['langcode' => 'xxx-lolspeak'];
 
-    $non_strict = array('strict' => FALSE);
+    $non_strict = ['strict' => FALSE];
 
-    $data = array(
+    $data = [
       // Checks for equal timestamps.
-      array('0 seconds', 0, $request_time, $request_time),
+      ['0 seconds', 0, $request_time, $request_time],
 
       // Checks for seconds only.
-      array('1 second', 1, $this->createTimestamp('2013-12-11 10:09:07'), $request_time),
-      array('1 second', 1, $this->createTimestamp('2013-12-11 10:09:07'), $request_time),
-      array('1 second', 1, $this->createTimestamp('2013-12-11 10:09:07'), $request_time, $granularity_3 + $langcode_en),
-      array('1 second', 1, $this->createTimestamp('2013-12-11 10:09:07'), $request_time, $granularity_4 + $langcode_lolspeak),
-      array('2 seconds', 1, $this->createTimestamp('2013-12-11 10:09:06'), $request_time),
-      array('59 seconds', 1, $this->createTimestamp('2013-12-11 10:08:09'), $request_time),
-      array('59 seconds', 1, $this->createTimestamp('2013-12-11 10:08:09'), $request_time),
+      ['1 second', 1, $this->createTimestamp('2013-12-11 10:09:07'), $request_time],
+      ['1 second', 1, $this->createTimestamp('2013-12-11 10:09:07'), $request_time],
+      ['1 second', 1, $this->createTimestamp('2013-12-11 10:09:07'), $request_time, $granularity_3 + $langcode_en],
+      ['1 second', 1, $this->createTimestamp('2013-12-11 10:09:07'), $request_time, $granularity_4 + $langcode_lolspeak],
+      ['2 seconds', 1, $this->createTimestamp('2013-12-11 10:09:06'), $request_time],
+      ['59 seconds', 1, $this->createTimestamp('2013-12-11 10:08:09'), $request_time],
+      ['59 seconds', 1, $this->createTimestamp('2013-12-11 10:08:09'), $request_time],
 
       // Checks for minutes and possibly seconds.
-      array('1 minute', 60, $this->createTimestamp('2013-12-11 10:08:08'), $request_time),
-      array('1 minute', 60, $this->createTimestamp('2013-12-11 10:08:08'), $request_time),
-      array('1 minute 1 second', 1, $this->createTimestamp('2013-12-11 10:08:07'), $request_time),
-      array('1 minute 59 seconds', 1, $this->createTimestamp('2013-12-11 10:07:09'), $request_time),
-      array('2 minutes', 60, $this->createTimestamp('2013-12-11 10:07:08'), $request_time),
-      array('2 minutes 1 second', 1, $this->createTimestamp('2013-12-11 10:07:07'), $request_time),
-      array('2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-11 10:07:06'), $request_time),
-      array('2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-11 10:07:06'), $request_time, $granularity_3),
-      array('2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-11 10:07:06'), $request_time, $granularity_4),
-      array('30 minutes', 60, $this->createTimestamp('2013-12-11 09:39:08'), $request_time),
-      array('59 minutes 59 seconds', 1, $this->createTimestamp('2013-12-11 09:09:09'), $request_time),
-      array('59 minutes 59 seconds', 1, $this->createTimestamp('2013-12-11 09:09:09'), $request_time),
+      ['1 minute', 60, $this->createTimestamp('2013-12-11 10:08:08'), $request_time],
+      ['1 minute', 60, $this->createTimestamp('2013-12-11 10:08:08'), $request_time],
+      ['1 minute 1 second', 1, $this->createTimestamp('2013-12-11 10:08:07'), $request_time],
+      ['1 minute 59 seconds', 1, $this->createTimestamp('2013-12-11 10:07:09'), $request_time],
+      ['2 minutes', 60, $this->createTimestamp('2013-12-11 10:07:08'), $request_time],
+      ['2 minutes 1 second', 1, $this->createTimestamp('2013-12-11 10:07:07'), $request_time],
+      ['2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-11 10:07:06'), $request_time],
+      ['2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-11 10:07:06'), $request_time, $granularity_3],
+      ['2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-11 10:07:06'), $request_time, $granularity_4],
+      ['30 minutes', 60, $this->createTimestamp('2013-12-11 09:39:08'), $request_time],
+      ['59 minutes 59 seconds', 1, $this->createTimestamp('2013-12-11 09:09:09'), $request_time],
+      ['59 minutes 59 seconds', 1, $this->createTimestamp('2013-12-11 09:09:09'), $request_time],
 
       // Checks for hours and possibly minutes or seconds.
-      array('1 hour', 3600, $this->createTimestamp('2013-12-11 09:09:08'), $request_time),
-      array('1 hour', 3600, $this->createTimestamp('2013-12-11 09:09:08'), $request_time),
-      array('1 hour', 3600, $this->createTimestamp('2013-12-11 09:09:07'), $request_time),
-      array('1 hour', 3600, $this->createTimestamp('2013-12-11 09:09:06'), $request_time),
-      array('1 hour 1 minute', 60, $this->createTimestamp('2013-12-11 09:08:08'), $request_time),
-      array('1 hour 1 minute 1 second', 1, $this->createTimestamp('2013-12-11 09:08:07'), $request_time, $granularity_3),
-      array('1 hour 1 minute 2 seconds', 1, $this->createTimestamp('2013-12-11 09:08:06'), $request_time, $granularity_4),
-      array('1 hour 30 minutes', 60, $this->createTimestamp('2013-12-11 08:39:08'), $request_time),
-      array('2 hours', 3600, $this->createTimestamp('2013-12-11 08:09:08'), $request_time),
-      array('23 hours 59 minutes', 60, $this->createTimestamp('2013-12-10 10:10:08'), $request_time),
+      ['1 hour', 3600, $this->createTimestamp('2013-12-11 09:09:08'), $request_time],
+      ['1 hour', 3600, $this->createTimestamp('2013-12-11 09:09:08'), $request_time],
+      ['1 hour', 3600, $this->createTimestamp('2013-12-11 09:09:07'), $request_time],
+      ['1 hour', 3600, $this->createTimestamp('2013-12-11 09:09:06'), $request_time],
+      ['1 hour 1 minute', 60, $this->createTimestamp('2013-12-11 09:08:08'), $request_time],
+      ['1 hour 1 minute 1 second', 1, $this->createTimestamp('2013-12-11 09:08:07'), $request_time, $granularity_3],
+      ['1 hour 1 minute 2 seconds', 1, $this->createTimestamp('2013-12-11 09:08:06'), $request_time, $granularity_4],
+      ['1 hour 30 minutes', 60, $this->createTimestamp('2013-12-11 08:39:08'), $request_time],
+      ['2 hours', 3600, $this->createTimestamp('2013-12-11 08:09:08'), $request_time],
+      ['23 hours 59 minutes', 60, $this->createTimestamp('2013-12-10 10:10:08'), $request_time],
 
       // Checks for days and possibly hours, minutes or seconds.
-      array('1 day', 86400, $this->createTimestamp('2013-12-10 10:09:08'), $request_time),
-      array('1 day', 86400, $this->createTimestamp('2013-12-10 10:09:07'), $request_time),
-      array('1 day 1 hour', 3600, $this->createTimestamp('2013-12-10 09:09:08'), $request_time),
-      array('1 day 1 hour 1 minute', 60, $this->createTimestamp('2013-12-10 09:08:07'), $request_time, $granularity_3 + $langcode_en),
-      array('1 day 1 hour 1 minute 1 second', 1, $this->createTimestamp('2013-12-10 09:08:07'), $request_time, $granularity_4 + $langcode_lolspeak),
-      array('1 day 2 hours 2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-10 08:07:06'), $request_time, $granularity_4),
-      array('2 days', 86400, $this->createTimestamp('2013-12-09 10:09:08'), $request_time),
-      array('2 days', 86400, $this->createTimestamp('2013-12-09 10:07:08'), $request_time),
-      array('2 days 2 hours', 3600, $this->createTimestamp('2013-12-09 08:09:08'), $request_time),
-      array('2 days 2 hours 2 minutes', 60, $this->createTimestamp('2013-12-09 08:07:06'), $request_time, $granularity_3 + $langcode_en),
-      array('2 days 2 hours 2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-09 08:07:06'), $request_time, $granularity_4 + $langcode_lolspeak),
+      ['1 day', 86400, $this->createTimestamp('2013-12-10 10:09:08'), $request_time],
+      ['1 day', 86400, $this->createTimestamp('2013-12-10 10:09:07'), $request_time],
+      ['1 day 1 hour', 3600, $this->createTimestamp('2013-12-10 09:09:08'), $request_time],
+      ['1 day 1 hour 1 minute', 60, $this->createTimestamp('2013-12-10 09:08:07'), $request_time, $granularity_3 + $langcode_en],
+      ['1 day 1 hour 1 minute 1 second', 1, $this->createTimestamp('2013-12-10 09:08:07'), $request_time, $granularity_4 + $langcode_lolspeak],
+      ['1 day 2 hours 2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-10 08:07:06'), $request_time, $granularity_4],
+      ['2 days', 86400, $this->createTimestamp('2013-12-09 10:09:08'), $request_time],
+      ['2 days', 86400, $this->createTimestamp('2013-12-09 10:07:08'), $request_time],
+      ['2 days 2 hours', 3600, $this->createTimestamp('2013-12-09 08:09:08'), $request_time],
+      ['2 days 2 hours 2 minutes', 60, $this->createTimestamp('2013-12-09 08:07:06'), $request_time, $granularity_3 + $langcode_en],
+      ['2 days 2 hours 2 minutes 2 seconds', 1, $this->createTimestamp('2013-12-09 08:07:06'), $request_time, $granularity_4 + $langcode_lolspeak],
 
       // Checks for weeks and possibly days, hours, minutes or seconds.
-      array('1 week', 7 * 86400, $this->createTimestamp('2013-12-04 10:09:08'), $request_time),
-      array('1 week 1 day', 86400, $this->createTimestamp('2013-12-03 10:09:08'), $request_time),
-      array('2 weeks', 7 * 86400, $this->createTimestamp('2013-11-27 10:09:08'), $request_time),
-      array('2 weeks 2 days', 86400, $this->createTimestamp('2013-11-25 08:07:08'), $request_time),
-      array('2 weeks 2 days 2 hours 2 minutes', 60, $this->createTimestamp('2013-11-25 08:07:08'), $request_time, $granularity_4),
-      array('4 weeks', 7 * 86400, $this->createTimestamp('2013-11-13 10:09:08'), $request_time),
-      array('4 weeks 1 day', 86400, $this->createTimestamp('2013-11-12 10:09:08'), $request_time),
+      ['1 week', 7 * 86400, $this->createTimestamp('2013-12-04 10:09:08'), $request_time],
+      ['1 week 1 day', 86400, $this->createTimestamp('2013-12-03 10:09:08'), $request_time],
+      ['2 weeks', 7 * 86400, $this->createTimestamp('2013-11-27 10:09:08'), $request_time],
+      ['2 weeks 2 days', 86400, $this->createTimestamp('2013-11-25 08:07:08'), $request_time],
+      ['2 weeks 2 days 2 hours 2 minutes', 60, $this->createTimestamp('2013-11-25 08:07:08'), $request_time, $granularity_4],
+      ['4 weeks', 7 * 86400, $this->createTimestamp('2013-11-13 10:09:08'), $request_time],
+      ['4 weeks 1 day', 86400, $this->createTimestamp('2013-11-12 10:09:08'), $request_time],
 
       // Checks for months and possibly days, hours, minutes or seconds.
-      array('1 month', 30 * 86400, $this->createTimestamp('2013-11-11 10:09:08'), $request_time),
-      array('1 month', 30 * 86400, $this->createTimestamp('2013-11-11 10:09:07'), $request_time),
-      array('1 month', 30 * 86400, $this->createTimestamp('2013-11-11 09:09:08'), $request_time),
-      array('1 month', 30 * 86400, $this->createTimestamp('2013-11-11 09:08:07'), $request_time, $granularity_3),
-      array('1 month', 30 * 86400, $this->createTimestamp('2013-11-11 09:08:07'), $request_time, $granularity_4),
-      array('1 month 4 weeks', 7 * 86400, $this->createTimestamp('2013-10-13 10:09:08'), $request_time),
-      array('1 month 4 weeks 1 day', 86400, $this->createTimestamp('2013-10-13 10:09:08'), $request_time, $granularity_3),
-      array('1 month 4 weeks', 7 * 86400, $this->createTimestamp('2013-10-12 10:09:08'), $request_time),
-      array('1 month 4 weeks 2 days', 86400, $this->createTimestamp('2013-10-12 10:09:08'), $request_time, $granularity_3),
-      array('2 months', 30 * 86400, $this->createTimestamp('2013-10-11 10:09:08'), $request_time),
-      array('2 months', 30 * 86400, $this->createTimestamp('2013-10-10 10:09:08'), $request_time),
-      array('2 months', 30 * 86400, $this->createTimestamp('2013-10-09 08:07:06'), $request_time),
-      array('2 months', 30 * 86400, $this->createTimestamp('2013-10-09 08:07:06'), $request_time, $granularity_3),
-      array('2 months', 30 * 86400, $this->createTimestamp('2013-10-09 08:07:06'), $request_time, $granularity_4),
-      array('6 months', 30 * 86400, $this->createTimestamp('2013-06-09 10:09:08'), $request_time),
-      array('11 months', 30 * 86400, $this->createTimestamp('2013-01-11 07:09:08'), $request_time),
-      array('11 months 4 weeks', 7 * 86400, $this->createTimestamp('2012-12-12 10:09:08'), $request_time),
-      array('11 months 4 weeks 2 days', 86400, $this->createTimestamp('2012-12-12 10:09:08'), $request_time, $granularity_3),
+      ['1 month', 30 * 86400, $this->createTimestamp('2013-11-11 10:09:08'), $request_time],
+      ['1 month', 30 * 86400, $this->createTimestamp('2013-11-11 10:09:07'), $request_time],
+      ['1 month', 30 * 86400, $this->createTimestamp('2013-11-11 09:09:08'), $request_time],
+      ['1 month', 30 * 86400, $this->createTimestamp('2013-11-11 09:08:07'), $request_time, $granularity_3],
+      ['1 month', 30 * 86400, $this->createTimestamp('2013-11-11 09:08:07'), $request_time, $granularity_4],
+      ['1 month 4 weeks', 7 * 86400, $this->createTimestamp('2013-10-13 10:09:08'), $request_time],
+      ['1 month 4 weeks 1 day', 86400, $this->createTimestamp('2013-10-13 10:09:08'), $request_time, $granularity_3],
+      ['1 month 4 weeks', 7 * 86400, $this->createTimestamp('2013-10-12 10:09:08'), $request_time],
+      ['1 month 4 weeks 2 days', 86400, $this->createTimestamp('2013-10-12 10:09:08'), $request_time, $granularity_3],
+      ['2 months', 30 * 86400, $this->createTimestamp('2013-10-11 10:09:08'), $request_time],
+      ['2 months', 30 * 86400, $this->createTimestamp('2013-10-10 10:09:08'), $request_time],
+      ['2 months', 30 * 86400, $this->createTimestamp('2013-10-09 08:07:06'), $request_time],
+      ['2 months', 30 * 86400, $this->createTimestamp('2013-10-09 08:07:06'), $request_time, $granularity_3],
+      ['2 months', 30 * 86400, $this->createTimestamp('2013-10-09 08:07:06'), $request_time, $granularity_4],
+      ['6 months', 30 * 86400, $this->createTimestamp('2013-06-09 10:09:08'), $request_time],
+      ['11 months', 30 * 86400, $this->createTimestamp('2013-01-11 07:09:08'), $request_time],
+      ['11 months 4 weeks', 7 * 86400, $this->createTimestamp('2012-12-12 10:09:08'), $request_time],
+      ['11 months 4 weeks 2 days', 86400, $this->createTimestamp('2012-12-12 10:09:08'), $request_time, $granularity_3],
 
       // Checks for years and possibly months, days, hours, minutes or seconds.
-      array('1 year', 365 * 86400, $this->createTimestamp('2012-12-11 10:09:08'), $request_time),
-      array('1 year', 365 * 86400, $this->createTimestamp('2012-12-11 10:08:08'), $request_time),
-      array('1 year', 365 * 86400, $this->createTimestamp('2012-12-10 10:09:08'), $request_time),
-      array('2 years', 365 * 86400, $this->createTimestamp('2011-12-11 10:09:08'), $request_time),
-      array('2 years', 365 * 86400, $this->createTimestamp('2011-12-11 10:07:08'), $request_time),
-      array('2 years', 365 * 86400, $this->createTimestamp('2011-12-09 10:09:08'), $request_time),
-      array('2 years 2 months', 30 * 86400, $this->createTimestamp('2011-10-09 08:07:06'), $request_time, $granularity_3),
-      array('2 years 2 months', 30 * 86400, $this->createTimestamp('2011-10-09 08:07:06'), $request_time, $granularity_4),
-      array('10 years', 365 * 86400, $this->createTimestamp('2003-12-11 10:09:08'), $request_time),
-      array('100 years', 365 * 86400, $this->createTimestamp('1913-12-11 10:09:08'), $request_time),
+      ['1 year', 365 * 86400, $this->createTimestamp('2012-12-11 10:09:08'), $request_time],
+      ['1 year', 365 * 86400, $this->createTimestamp('2012-12-11 10:08:08'), $request_time],
+      ['1 year', 365 * 86400, $this->createTimestamp('2012-12-10 10:09:08'), $request_time],
+      ['2 years', 365 * 86400, $this->createTimestamp('2011-12-11 10:09:08'), $request_time],
+      ['2 years', 365 * 86400, $this->createTimestamp('2011-12-11 10:07:08'), $request_time],
+      ['2 years', 365 * 86400, $this->createTimestamp('2011-12-09 10:09:08'), $request_time],
+      ['2 years 2 months', 30 * 86400, $this->createTimestamp('2011-10-09 08:07:06'), $request_time, $granularity_3],
+      ['2 years 2 months', 30 * 86400, $this->createTimestamp('2011-10-09 08:07:06'), $request_time, $granularity_4],
+      ['10 years', 365 * 86400, $this->createTimestamp('2003-12-11 10:09:08'), $request_time],
+      ['100 years', 365 * 86400, $this->createTimestamp('1913-12-11 10:09:08'), $request_time],
 
       // Checks the non-strict option vs. strict (default).
-      array('1 second', 1, $this->createTimestamp('2013-12-11 10:09:08'), $this->createTimestamp('2013-12-11 10:09:07'), $non_strict),
-      array('0 seconds', 0, $this->createTimestamp('2013-12-11 10:09:08'), $this->createTimestamp('2013-12-11 10:09:07')),
+      ['1 second', 1, $this->createTimestamp('2013-12-11 10:09:08'), $this->createTimestamp('2013-12-11 10:09:07'), $non_strict],
+      ['0 seconds', 0, $this->createTimestamp('2013-12-11 10:09:08'), $this->createTimestamp('2013-12-11 10:09:07')],
 
       // Checks granularity limit.
-      array('2 years 3 months 1 week', 7 * 86400, $this->createTimestamp('2011-08-30 11:15:57'), $request_time, $granularity_3),
-    );
+      ['2 years 3 months 1 week', 7 * 86400, $this->createTimestamp('2011-08-30 11:15:57'), $request_time, $granularity_3],
+    ];
 
     return $data;
   }
diff --git a/core/tests/Drupal/Tests/Core/Datetime/DrupalDateTimeTest.php b/core/tests/Drupal/Tests/Core/Datetime/DrupalDateTimeTest.php
index e77542bc7b55f05d988bd7b30c24426441bacd68..eff9f77294210c2647b136b32b3c67e03a9a3464 100644
--- a/core/tests/Drupal/Tests/Core/Datetime/DrupalDateTimeTest.php
+++ b/core/tests/Drupal/Tests/Core/Datetime/DrupalDateTimeTest.php
@@ -73,61 +73,61 @@ public function providerTestDateDiff() {
     $negative_1_hour = new \DateInterval('PT1H');
     $negative_1_hour->invert = 1;
 
-    return array(
+    return [
 
       // There should be a 19 hour time interval between
       // new years in Sydney and new years in LA in year 2000.
-      array(
+      [
         'input2' => DrupalDateTime::createFromFormat('Y-m-d H:i:s', '2000-01-01 00:00:00', new \DateTimeZone('Australia/Sydney'), $settings),
         'input1' => DrupalDateTime::createFromFormat('Y-m-d H:i:s', '2000-01-01 00:00:00', new \DateTimeZone('America/Los_Angeles'), $settings),
         'absolute' => FALSE,
         'expected' => $positive_19_hours,
-      ),
+      ],
       // In 1970 Sydney did not observe daylight savings time
       // So there is only a 18 hour time interval.
-      array(
+      [
         'input2' => DrupalDateTime::createFromFormat('Y-m-d H:i:s', '1970-01-01 00:00:00', new \DateTimeZone('Australia/Sydney'), $settings),
         'input1' => DrupalDateTime::createFromFormat('Y-m-d H:i:s', '1970-01-01 00:00:00', new \DateTimeZone('America/Los_Angeles'), $settings),
         'absolute' => FALSE,
         'expected' => $positive_18_hours,
-      ),
-      array(
+      ],
+      [
         'input1' => DrupalDateTime::createFromFormat('U', 3600, new \DateTimeZone('America/Los_Angeles'), $settings),
         'input2' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
         'absolute' => FALSE,
         'expected' => $negative_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
         'input2' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
         'absolute' => FALSE,
         'expected' => $negative_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
         'input2' => \DateTime::createFromFormat('U', 0),
         'absolute' => FALSE,
         'expected' => $negative_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
         'input2' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
         'absolute' => TRUE,
         'expected' => $positive_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
         'input2' => \DateTime::createFromFormat('U', 0),
         'absolute' => TRUE,
         'expected' => $positive_1_hour,
-      ),
-      array(
+      ],
+      [
         'input1' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
         'input2' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
         'absolute' => FALSE,
         'expected' => $empty_interval,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -142,18 +142,18 @@ public function providerTestDateDiff() {
   public function providerTestInvalidDateDiff() {
     $settings = ['langcode' => 'en'];
     $utc_tz = new \DateTimeZone('UTC');
-    return array(
-      array(
+    return [
+      [
         'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
         'input2' => '1970-01-01 00:00:00',
         'absolute' => FALSE,
-      ),
-      array(
+      ],
+      [
         'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
         'input2' => NULL,
         'absolute' => FALSE,
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php
index ee13b934a78484619430115bfd1d889173763229..3f8ca09bfe43e1bbd8b0fa04e2f1c1e2e1bd6f37 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/BackendCompilerPassTest.php
@@ -57,18 +57,18 @@ public function testProcess($expected_class, ContainerBuilder $container) {
    * @return array
    */
   public function providerTestProcess() {
-    $data = array();
+    $data = [];
     // Add a container with no set default_backend.
     $prefix = __NAMESPACE__ . '\\ServiceClass';
     $service = (new Definition($prefix . 'Default'))->addTag('backend_overridable');
     $container = $this->getMysqlContainer($service);
 
-    $data[] = array($prefix . 'Default', $container);
+    $data[] = [$prefix . 'Default', $container];
 
     // Set the default_backend so the mysql service should be used.
     $container = $this->getMysqlContainer($service);
     $container->setParameter('default_backend', 'mysql');
-    $data[] = array($prefix . 'Mysql', $container);
+    $data[] = [$prefix . 'Mysql', $container];
 
     // Configure a manual alias for the service, so ensure that it is not
     // overridden by the default backend.
@@ -76,16 +76,16 @@ public function providerTestProcess() {
     $container->setParameter('default_backend', 'mysql');
     $container->setDefinition('mariadb.service', new Definition($prefix . 'MariaDb'));
     $container->setAlias('service', new Alias('mariadb.service'));
-    $data[] = array($prefix . 'MariaDb', $container);
+    $data[] = [$prefix . 'MariaDb', $container];
 
     // Check the database driver is the default.
     $container = $this->getSqliteContainer($service);
-    $data[] = array($prefix . 'Sqlite', $container);
+    $data[] = [$prefix . 'Sqlite', $container];
 
     // Test the opt out.
     $container = $this->getSqliteContainer($service);
     $container->setParameter('default_backend', '');
-    $data[] = array($prefix . 'Default', $container);
+    $data[] = [$prefix . 'Default', $container];
 
     return $data;
   }
diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/TaggedHandlersPassTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/TaggedHandlersPassTest.php
index 6719cbc96fcc2d8b5bb99ca76f7aba770487455a..9335b7d7c83aea5ad984267649bb4aa7ec1f2bff 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/TaggedHandlersPassTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/Compiler/TaggedHandlersPassTest.php
@@ -52,9 +52,9 @@ public function testProcessRequiredHandlers() {
     $container = $this->buildContainer();
     $container
       ->register('consumer_id', __NAMESPACE__ . '\ValidConsumer')
-      ->addTag('service_collector', array(
+      ->addTag('service_collector', [
         'required' => TRUE,
-      ));
+      ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
@@ -121,9 +121,9 @@ public function testProcessPriority() {
       ->addTag('consumer_id');
     $container
       ->register('handler2', __NAMESPACE__ . '\ValidHandler')
-      ->addTag('consumer_id', array(
+      ->addTag('consumer_id', [
         'priority' => 10,
-      ));
+      ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
@@ -145,18 +145,18 @@ public function testProcessNoPriorityParam() {
     $container = $this->buildContainer();
     $container
       ->register('consumer_id', __NAMESPACE__ . '\ValidConsumer')
-      ->addTag('service_collector', array(
+      ->addTag('service_collector', [
         'call' => 'addNoPriority',
-      ));
+      ]);
 
     $container
       ->register('handler1', __NAMESPACE__ . '\ValidHandler')
       ->addTag('consumer_id');
     $container
       ->register('handler2', __NAMESPACE__ . '\ValidHandler')
-      ->addTag('consumer_id', array(
+      ->addTag('consumer_id', [
         'priority' => 10,
-      ));
+      ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
@@ -178,18 +178,18 @@ public function testProcessWithIdParameter() {
     $container = $this->buildContainer();
     $container
       ->register('consumer_id', __NAMESPACE__ . '\ValidConsumer')
-      ->addTag('service_collector', array(
+      ->addTag('service_collector', [
         'call' => 'addWithId',
-      ));
+      ]);
 
     $container
       ->register('handler1', __NAMESPACE__ . '\ValidHandler')
       ->addTag('consumer_id');
     $container
       ->register('handler2', __NAMESPACE__ . '\ValidHandler')
-      ->addTag('consumer_id', array(
+      ->addTag('consumer_id', [
         'priority' => 10,
-      ));
+      ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
@@ -221,9 +221,9 @@ public function testProcessInterfaceMismatch() {
       ->addTag('consumer_id');
     $container
       ->register('handler2', __NAMESPACE__ . '\ValidHandler')
-      ->addTag('consumer_id', array(
+      ->addTag('consumer_id', [
         'priority' => 10,
-      ));
+      ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
@@ -243,10 +243,10 @@ public function testProcessWithExtraArguments() {
 
     $container
       ->register('handler1', __NAMESPACE__ . '\ValidHandler')
-      ->addTag('consumer_id', array(
+      ->addTag('consumer_id', [
           'extra1' => 'extra1',
           'extra2' => 'extra2',
-        ));
+        ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
@@ -269,15 +269,15 @@ public function testProcessNoPriorityAndExtraArguments() {
 
     $container
       ->register('consumer_id', __NAMESPACE__ . '\ValidConsumerWithExtraArguments')
-      ->addTag('service_collector', array(
+      ->addTag('service_collector', [
         'call' => 'addNoPriority'
-      ));
+      ]);
 
     $container
       ->register('handler1', __NAMESPACE__ . '\ValidHandler')
-      ->addTag('consumer_id', array(
+      ->addTag('consumer_id', [
         'extra' => 'extra',
-      ));
+      ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
@@ -298,15 +298,15 @@ public function testProcessWithIdAndExtraArguments() {
 
     $container
       ->register('consumer_id', __NAMESPACE__ . '\ValidConsumerWithExtraArguments')
-      ->addTag('service_collector', array(
+      ->addTag('service_collector', [
         'call' => 'addWithId'
-      ));
+      ]);
 
     $container
       ->register('handler1', __NAMESPACE__ . '\ValidHandler')
-      ->addTag('consumer_id', array(
+      ->addTag('consumer_id', [
         'extra1' => 'extra1',
-      ));
+      ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
@@ -330,17 +330,17 @@ public function testProcessWithDifferentArgumentsOrderAndDefaultValue() {
 
     $container
       ->register('consumer_id', __NAMESPACE__ . '\ValidConsumerWithExtraArguments')
-      ->addTag('service_collector', array(
+      ->addTag('service_collector', [
         'call' => 'addWithDifferentOrder'
-      ));
+      ]);
 
     $container
       ->register('handler1', __NAMESPACE__ . '\ValidHandler')
-      ->addTag('consumer_id', array(
+      ->addTag('consumer_id', [
         'priority' => 0,
         'extra1' => 'extra1',
         'extra3' => 'extra3'
-      ));
+      ]);
 
     $handler_pass = new TaggedHandlersPass();
     $handler_pass->process($container);
diff --git a/core/tests/Drupal/Tests/Core/Display/DisplayVariantTest.php b/core/tests/Drupal/Tests/Core/Display/DisplayVariantTest.php
index 2a5472559e258444fce9606dfdb62100d5e1088a..3729d7eaee319d06f185d5a8e3318221a1117789 100644
--- a/core/tests/Drupal/Tests/Core/Display/DisplayVariantTest.php
+++ b/core/tests/Drupal/Tests/Core/Display/DisplayVariantTest.php
@@ -22,10 +22,10 @@ class DisplayVariantTest extends UnitTestCase {
    * @return \Drupal\Core\Display\VariantBase|\PHPUnit_Framework_MockObject_MockObject
    *   A mocked display variant plugin.
    */
-  public function setUpDisplayVariant($configuration = array(), $definition = array()) {
+  public function setUpDisplayVariant($configuration = [], $definition = []) {
     return $this->getMockBuilder('Drupal\Core\Display\VariantBase')
-      ->setConstructorArgs(array($configuration, 'test', $definition))
-      ->setMethods(array('build'))
+      ->setConstructorArgs([$configuration, 'test', $definition])
+      ->setMethods(['build'])
       ->getMock();
   }
 
@@ -35,7 +35,7 @@ public function setUpDisplayVariant($configuration = array(), $definition = arra
    * @covers ::label
    */
   public function testLabel() {
-    $display_variant = $this->setUpDisplayVariant(array('label' => 'foo'));
+    $display_variant = $this->setUpDisplayVariant(['label' => 'foo']);
     $this->assertSame('foo', $display_variant->label());
   }
 
@@ -55,7 +55,7 @@ public function testLabelDefault() {
    * @covers ::getWeight
    */
   public function testGetWeight() {
-    $display_variant = $this->setUpDisplayVariant(array('weight' => 5));
+    $display_variant = $this->setUpDisplayVariant(['weight' => 5]);
     $this->assertSame(5, $display_variant->getWeight());
   }
 
@@ -86,34 +86,34 @@ public function testGetConfiguration($configuration, $expected) {
    * Provides test data for testGetConfiguration().
    */
   public function providerTestGetConfiguration() {
-    $data = array();
-    $data[] = array(
-      array(),
-      array(
+    $data = [];
+    $data[] = [
+      [],
+      [
         'id' => 'test',
         'label' => '',
         'uuid' => '',
         'weight' => 0,
-      ),
-    );
-    $data[] = array(
-      array('label' => 'Test'),
-      array(
+      ],
+    ];
+    $data[] = [
+      ['label' => 'Test'],
+      [
         'id' => 'test',
         'label' => 'Test',
         'uuid' => '',
         'weight' => 0,
-      ),
-    );
-    $data[] = array(
-      array('id' => 'foo'),
-      array(
+      ],
+    ];
+    $data[] = [
+      ['id' => 'foo'],
+      [
         'id' => 'test',
         'label' => '',
         'uuid' => '',
         'weight' => 0,
-      ),
-    );
+      ],
+    ];
     return $data;
   }
 
@@ -136,7 +136,7 @@ public function testSubmitConfigurationForm() {
     $display_variant = $this->setUpDisplayVariant();
     $this->assertSame('', $display_variant->label());
 
-    $form = array();
+    $form = [];
     $label = $this->randomMachineName();
     $form_state = new FormState();
     $form_state->setValue('label', $label);
diff --git a/core/tests/Drupal/Tests/Core/DrupalKernel/DiscoverServiceProvidersTest.php b/core/tests/Drupal/Tests/Core/DrupalKernel/DiscoverServiceProvidersTest.php
index 164da9d954c3ae6ab6e8e3520c2286eeb0a20066..8983c8d76deb9729d024ade728de72309852a988 100644
--- a/core/tests/Drupal/Tests/Core/DrupalKernel/DiscoverServiceProvidersTest.php
+++ b/core/tests/Drupal/Tests/Core/DrupalKernel/DiscoverServiceProvidersTest.php
@@ -19,23 +19,23 @@ class DiscoverServiceProvidersTest extends UnitTestCase {
    * @covers ::discoverServiceProviders
    */
   public function testDiscoverServiceCustom() {
-    new Settings(array(
-      'container_yamls' => array(
+    new Settings([
+      'container_yamls' => [
         __DIR__ . '/fixtures/custom.yml'
-      ),
-    ));
+      ],
+    ]);
 
     $kernel = new DrupalKernel('prod', new ClassLoader());
     $kernel->discoverServiceProviders();
 
-    $expect = array(
-      'app' => array(
+    $expect = [
+      'app' => [
         'core' => 'core/core.services.yml',
-      ),
-      'site' => array(
+      ],
+      'site' => [
         __DIR__ . '/fixtures/custom.yml',
-      ),
-    );
+      ],
+    ];
 
     $this->assertAttributeSame($expect, 'serviceYamls', $kernel);
   }
diff --git a/core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php b/core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php
index 81f181816765b4034499d3b32f1908b60d314261..7278fd6a98398d739737211064b57f5b5da09574 100644
--- a/core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php
+++ b/core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php
@@ -206,14 +206,14 @@ class fakeAutoloader {
      *   Whether to prepend the autoloader or not
      */
     public function register($prepend = FALSE) {
-      spl_autoload_register(array($this, 'loadClass'), TRUE, $prepend);
+      spl_autoload_register([$this, 'loadClass'], TRUE, $prepend);
     }
 
     /**
      * Unregisters this instance as an autoloader.
      */
     public function unregister() {
-      spl_autoload_unregister(array($this, 'loadClass'));
+      spl_autoload_unregister([$this, 'loadClass']);
     }
 
     /**
diff --git a/core/tests/Drupal/Tests/Core/DrupalTest.php b/core/tests/Drupal/Tests/Core/DrupalTest.php
index 312e60799f5062009f4493cee0983150debcdbe3..55c9beaf754169bd7f7c7a00b974119584744cc1 100644
--- a/core/tests/Drupal/Tests/Core/DrupalTest.php
+++ b/core/tests/Drupal/Tests/Core/DrupalTest.php
@@ -31,7 +31,7 @@ class DrupalTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
     $this->container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerBuilder')
-      ->setMethods(array('get'))
+      ->setMethods(['get'])
       ->getMock();
   }
 
@@ -347,8 +347,8 @@ public function testUrlGenerator() {
    * @see \Drupal\Core\Routing\UrlGeneratorInterface::generateFromRoute()
    */
   public function testUrl() {
-    $route_parameters = array('test_parameter' => 'test');
-    $options = array('test_option' => 'test');
+    $route_parameters = ['test_parameter' => 'test'];
+    $options = ['test_option' => 'test'];
     $generator = $this->getMock('Drupal\Core\Routing\UrlGeneratorInterface');
     $generator->expects($this->once())
       ->method('generateFromRoute')
@@ -376,8 +376,8 @@ public function testLinkGenerator() {
    * @see \Drupal\Core\Utility\LinkGeneratorInterface::generate()
    */
   public function testL() {
-    $route_parameters = array('test_parameter' => 'test');
-    $options = array('test_option' => 'test');
+    $route_parameters = ['test_parameter' => 'test'];
+    $options = ['test_option' => 'test'];
     $generator = $this->getMock('Drupal\Core\Utility\LinkGeneratorInterface');
     $url = new Url('test_route', $route_parameters, $options);
     $generator->expects($this->once())
diff --git a/core/tests/Drupal/Tests/Core/Enhancer/ParamConversionEnhancerTest.php b/core/tests/Drupal/Tests/Core/Enhancer/ParamConversionEnhancerTest.php
index 104ca8cf19e96ec8cf16aecaf322b7843ef22580..064cedf97afd11b5ddd8256927952ac7dd35e7c8 100644
--- a/core/tests/Drupal/Tests/Core/Enhancer/ParamConversionEnhancerTest.php
+++ b/core/tests/Drupal/Tests/Core/Enhancer/ParamConversionEnhancerTest.php
@@ -41,14 +41,14 @@ protected function setUp() {
   public function testEnhance() {
     $route = new Route('/test/{id}/{literal}/{null}');
 
-    $raw_variables = array(
+    $raw_variables = [
       'id' => 1,
       'literal' => 'this is a literal',
       'null' => NULL,
-    );
-    $defaults = array(
+    ];
+    $defaults = [
       RouteObjectInterface::ROUTE_OBJECT => $route,
-    ) + $raw_variables;
+    ] + $raw_variables;
 
     $expected = $defaults;
     $expected['id'] = 'something_better!';
@@ -75,10 +75,10 @@ public function testEnhance() {
    */
   public function testCopyRawVariables() {
     $route = new Route('/test/{id}');
-    $defaults = array(
+    $defaults = [
       RouteObjectInterface::ROUTE_OBJECT => $route,
       'id' => '1',
-    );
+    ];
     // Set one default to mirror another by reference.
     $defaults['bar'] = &$defaults['id'];
     $this->paramConverterManager->expects($this->any())
@@ -89,7 +89,7 @@ public function testCopyRawVariables() {
         $defaults['bar'] = '2';
         return $defaults;
       }));
-    $expected = new ParameterBag(array('id' => 1));
+    $expected = new ParameterBag(['id' => 1]);
     $result = $this->paramConversionEnhancer->enhance($defaults, new Request());
     $this->assertEquals($result['_raw_variables'], $expected);
   }
diff --git a/core/tests/Drupal/Tests/Core/Entity/BaseFieldDefinitionTest.php b/core/tests/Drupal/Tests/Core/Entity/BaseFieldDefinitionTest.php
index bb4668306b4371b7d4291a0fb8bbae2bde69e1fb..f7a98517cebce47f113fc342321a72b9f0949a31 100644
--- a/core/tests/Drupal/Tests/Core/Entity/BaseFieldDefinitionTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/BaseFieldDefinitionTest.php
@@ -38,19 +38,19 @@ protected function setUp() {
     $field_type_manager = $this->getMock('Drupal\Core\Field\FieldTypePluginManagerInterface');
 
     $this->fieldType = $this->randomMachineName();
-    $this->fieldTypeDefinition = array(
+    $this->fieldTypeDefinition = [
       'id' => $this->fieldType,
-      'storage_settings' => array(
+      'storage_settings' => [
         'some_setting' => 'value 1'
-      ),
-      'field_settings' => array(
+      ],
+      'field_settings' => [
         'some_instance_setting' => 'value 2',
-      ),
-    );
+      ],
+    ];
 
     $field_type_manager->expects($this->any())
       ->method('getDefinitions')
-      ->will($this->returnValue(array($this->fieldType => $this->fieldTypeDefinition)));
+      ->will($this->returnValue([$this->fieldType => $this->fieldTypeDefinition]));
     $field_type_manager->expects($this->any())
       ->method('getDefinition')
       ->with($this->fieldType)
@@ -129,7 +129,7 @@ public function testFieldSettings() {
     $definition->setSetting($setting, $value);
     $this->assertEquals($value, $definition->getSetting($setting));
     $default_settings = $this->fieldTypeDefinition['storage_settings'] + $this->fieldTypeDefinition['field_settings'];
-    $this->assertEquals(array($setting => $value) + $default_settings, $definition->getSettings());
+    $this->assertEquals([$setting => $value] + $default_settings, $definition->getSettings());
   }
 
   /**
@@ -156,10 +156,10 @@ public function testDefaultFieldSettings() {
    */
   public function testFieldDefaultValue() {
     $definition = BaseFieldDefinition::create($this->fieldType);
-    $default_value = array(
+    $default_value = [
       'value' => $this->randomMachineName(),
-    );
-    $expected_default_value = array($default_value);
+    ];
+    $expected_default_value = [$default_value];
     $definition->setDefaultValue($default_value);
     $entity = $this->getMockBuilder('Drupal\Core\Entity\ContentEntityBase')
       ->disableOriginalConstructor()
@@ -186,8 +186,8 @@ public function testFieldDefaultValue() {
     $this->assertEquals($expected_default_value, $definition->getDefaultValue($entity));
 
     // Set default value with an empty array.
-    $definition->setDefaultValue(array());
-    $this->assertEquals(array(), $definition->getDefaultValue($entity));
+    $definition->setDefaultValue([]);
+    $this->assertEquals([], $definition->getDefaultValue($entity));
 
     // Set default value with NULL.
     $definition->setDefaultValue(NULL);
diff --git a/core/tests/Drupal/Tests/Core/Entity/ContentEntityBaseUnitTest.php b/core/tests/Drupal/Tests/Core/Entity/ContentEntityBaseUnitTest.php
index e8134ef900f294ffa495db11616281812cf71497..b765af8a699d34ac5ed049eefad9aaf9b2445065 100644
--- a/core/tests/Drupal/Tests/Core/Entity/ContentEntityBaseUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/ContentEntityBaseUnitTest.php
@@ -107,21 +107,21 @@ class ContentEntityBaseUnitTest extends UnitTestCase {
    */
   protected function setUp() {
     $this->id = 1;
-    $values = array(
+    $values = [
       'id' => $this->id,
       'uuid' => '3bb9ee60-bea5-4622-b89b-a63319d10b3a',
-      'defaultLangcode' => array(LanguageInterface::LANGCODE_DEFAULT => 'en'),
-    );
+      'defaultLangcode' => [LanguageInterface::LANGCODE_DEFAULT => 'en'],
+    ];
     $this->entityTypeId = $this->randomMachineName();
     $this->bundle = $this->randomMachineName();
 
     $this->entityType = $this->getMock('\Drupal\Core\Entity\EntityTypeInterface');
     $this->entityType->expects($this->any())
       ->method('getKeys')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'id' => 'id',
         'uuid' => 'uuid',
-    )));
+    ]));
 
     $this->entityManager = $this->getMock('\Drupal\Core\Entity\EntityManagerInterface');
     $this->entityManager->expects($this->any())
@@ -137,12 +137,12 @@ protected function setUp() {
       ->with('entity')
       ->will($this->returnValue(['class' => '\Drupal\Core\Entity\Plugin\DataType\EntityAdapter']));
 
-    $english = new Language(array('id' => 'en'));
-    $not_specified = new Language(array('id' => LanguageInterface::LANGCODE_NOT_SPECIFIED, 'locked' => TRUE));
+    $english = new Language(['id' => 'en']);
+    $not_specified = new Language(['id' => LanguageInterface::LANGCODE_NOT_SPECIFIED, 'locked' => TRUE]);
     $this->languageManager = $this->getMock('\Drupal\Core\Language\LanguageManagerInterface');
     $this->languageManager->expects($this->any())
       ->method('getLanguages')
-      ->will($this->returnValue(array('en' => $english, LanguageInterface::LANGCODE_NOT_SPECIFIED => $not_specified)));
+      ->will($this->returnValue(['en' => $english, LanguageInterface::LANGCODE_NOT_SPECIFIED => $not_specified]));
     $this->languageManager->expects($this->any())
       ->method('getLanguage')
       ->with('en')
@@ -157,10 +157,10 @@ protected function setUp() {
       ->getMock();
     $this->fieldTypePluginManager->expects($this->any())
       ->method('getDefaultStorageSettings')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->fieldTypePluginManager->expects($this->any())
       ->method('getDefaultFieldSettings')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->fieldTypePluginManager->expects($this->any())
       ->method('createFieldItemList')
       ->will($this->returnValue($this->getMock('Drupal\Core\Field\FieldItemListInterface')));
@@ -173,19 +173,19 @@ protected function setUp() {
     $container->set('plugin.manager.field.field_type', $this->fieldTypePluginManager);
     \Drupal::setContainer($container);
 
-    $this->fieldDefinitions = array(
+    $this->fieldDefinitions = [
       'id' => BaseFieldDefinition::create('integer'),
       'revision_id' => BaseFieldDefinition::create('integer'),
-    );
+    ];
 
     $this->entityManager->expects($this->any())
       ->method('getFieldDefinitions')
       ->with($this->entityTypeId, $this->bundle)
       ->will($this->returnValue($this->fieldDefinitions));
 
-    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Entity\ContentEntityBase', array($values, $this->entityTypeId, $this->bundle), '', TRUE, TRUE, TRUE, ['isNew']);
-    $values['defaultLangcode'] = array(LanguageInterface::LANGCODE_DEFAULT => LanguageInterface::LANGCODE_NOT_SPECIFIED);
-    $this->entityUnd = $this->getMockForAbstractClass('\Drupal\Core\Entity\ContentEntityBase', array($values, $this->entityTypeId, $this->bundle));
+    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Entity\ContentEntityBase', [$values, $this->entityTypeId, $this->bundle], '', TRUE, TRUE, TRUE, ['isNew']);
+    $values['defaultLangcode'] = [LanguageInterface::LANGCODE_DEFAULT => LanguageInterface::LANGCODE_NOT_SPECIFIED];
+    $this->entityUnd = $this->getMockForAbstractClass('\Drupal\Core\Entity\ContentEntityBase', [$values, $this->entityTypeId, $this->bundle]);
   }
 
   /**
@@ -285,11 +285,11 @@ public function testIsTranslatable() {
     $this->entityManager->expects($this->any())
       ->method('getBundleInfo')
       ->with($this->entityTypeId)
-      ->will($this->returnValue(array(
-        $this->bundle => array(
+      ->will($this->returnValue([
+        $this->bundle => [
           'translatable' => TRUE,
-        ),
-      )));
+        ],
+      ]));
     $this->languageManager->expects($this->any())
       ->method('isMultilingual')
       ->will($this->returnValue(TRUE));
@@ -458,7 +458,7 @@ public function testLabel() {
       ->will($this->returnValue($callback_label));
     $this->entityType->expects($this->once())
       ->method('getLabelCallback')
-      ->will($this->returnValue(array($callback_container, __FUNCTION__)));
+      ->will($this->returnValue([$callback_container, __FUNCTION__]));
 
     $this->assertSame($callback_label, $this->entity->label());
   }
@@ -491,7 +491,7 @@ public function testGet($expected, $field_name, $active_langcode, $fields) {
     // Mock ContentEntityBase.
     $mock_base = $this->getMockBuilder('Drupal\Core\Entity\ContentEntityBase')
       ->disableOriginalConstructor()
-      ->setMethods(array('getTranslatedField'))
+      ->setMethods(['getTranslatedField'])
       ->getMockForAbstractClass();
 
     // Set up expectations for getTranslatedField() method. In get(),
@@ -553,14 +553,14 @@ public function testGetFields($expected, $include_computed, $is_computed, $field
     // Mock ContentEntityBase.
     $mock_base = $this->getMockBuilder('Drupal\Core\Entity\ContentEntityBase')
       ->disableOriginalConstructor()
-      ->setMethods(array('getFieldDefinitions', 'get'))
+      ->setMethods(['getFieldDefinitions', 'get'])
       ->getMockForAbstractClass();
 
     // Mock field definition objects for each element of $field_definitions.
-    $mocked_field_definitions = array();
+    $mocked_field_definitions = [];
     foreach ($field_definitions as $name) {
       $mock_definition = $this->getMockBuilder('Drupal\Core\Field\FieldDefinitionInterface')
-        ->setMethods(array('isComputed'))
+        ->setMethods(['isComputed'])
         ->getMockForAbstractClass();
       // Set expectations for isComputed(). isComputed() gets called whenever
       // $include_computed is FALSE, but not otherwise. It returns the value of
diff --git a/core/tests/Drupal/Tests/Core/Entity/Enhancer/EntityRouteEnhancerTest.php b/core/tests/Drupal/Tests/Core/Entity/Enhancer/EntityRouteEnhancerTest.php
index 2794603c30592c5445c37a05bc85787d6265133b..1b6525a93b58e0737789834a5eba054a93fd140f 100644
--- a/core/tests/Drupal/Tests/Core/Entity/Enhancer/EntityRouteEnhancerTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Enhancer/EntityRouteEnhancerTest.php
@@ -23,7 +23,7 @@ public function testEnhancer() {
 
     // Set a controller to ensure it is not overridden.
     $request = new Request();
-    $defaults = array();
+    $defaults = [];
     $defaults['_controller'] = 'Drupal\Tests\Core\Controller\TestController::content';
     $defaults['_entity_form'] = 'entity_test.default';
     $new_defaults = $route_enhancer->enhance($defaults, $request);
@@ -31,13 +31,13 @@ public function testEnhancer() {
     $this->assertEquals($defaults['_controller'], $new_defaults['_controller'], '_controller did not get overridden.');
 
     // Set _entity_form and ensure that the form is set.
-    $defaults = array();
+    $defaults = [];
     $defaults['_entity_form'] = 'entity_test.default';
     $new_defaults = $route_enhancer->enhance($defaults, $request);
     $this->assertEquals('controller.entity_form:getContentResult', $new_defaults['_controller']);
 
     // Set _entity_list and ensure that the entity list controller is set.
-    $defaults = array();
+    $defaults = [];
     $defaults['_entity_list'] = 'entity_test.default';
     $new_defaults = $route_enhancer->enhance($defaults, $request);
     $this->assertEquals('\Drupal\Core\Entity\Controller\EntityListController::listing', $new_defaults['_controller'], 'The entity list controller was not set.');
@@ -45,7 +45,7 @@ public function testEnhancer() {
     $this->assertFalse(isset($new_defaults['_entity_list']));
 
     // Set _entity_view and ensure that the entity view controller is set.
-    $defaults = array();
+    $defaults = [];
     $defaults['_entity_view'] = 'entity_test.full';
     $defaults['entity_test'] = 'Mock entity';
     $defaults = $route_enhancer->enhance($defaults, $request);
@@ -56,11 +56,11 @@ public function testEnhancer() {
 
     // Set _entity_view and ensure that the entity view controller is set using
     // a converter.
-    $defaults = array();
+    $defaults = [];
     $defaults['_entity_view'] = 'entity_test.full';
     $defaults['foo'] = 'Mock entity';
     // Add a converter.
-    $options['parameters']['foo'] = array('type' => 'entity:entity_test');
+    $options['parameters']['foo'] = ['type' => 'entity:entity_test'];
     // Set the route.
     $route = $this->getMockBuilder('Symfony\Component\Routing\Route')
       ->disableOriginalConstructor()
@@ -78,7 +78,7 @@ public function testEnhancer() {
     $this->assertFalse(isset($defaults['_entity_view']));
 
     // Set _entity_view without a view mode.
-    $defaults = array();
+    $defaults = [];
     $defaults['_entity_view'] = 'entity_test';
     $defaults['entity_test'] = 'Mock entity';
     $defaults = $route_enhancer->enhance($defaults, $request);
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityCreateAccessCheckTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityCreateAccessCheckTest.php
index 5430fee6270339294241c39d31768f4d2bcec637..2c3d132cf3c0fd459717498f3ae7e0317ada080b 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityCreateAccessCheckTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityCreateAccessCheckTest.php
@@ -47,18 +47,18 @@ public function providerTestAccess() {
     $no_access = FALSE;
     $access = TRUE;
 
-    return array(
-      array('', 'entity_test', $no_access, $no_access),
-      array('', 'entity_test', $access, $access),
-      array('test_entity', 'entity_test:test_entity', $access, $access),
-      array('test_entity', 'entity_test:test_entity', $no_access, $no_access),
-      array('test_entity', 'entity_test:{bundle_argument}', $access, $access),
-      array('test_entity', 'entity_test:{bundle_argument}', $no_access, $no_access),
-      array('', 'entity_test:{bundle_argument}', $no_access, $no_access, FALSE),
+    return [
+      ['', 'entity_test', $no_access, $no_access],
+      ['', 'entity_test', $access, $access],
+      ['test_entity', 'entity_test:test_entity', $access, $access],
+      ['test_entity', 'entity_test:test_entity', $no_access, $no_access],
+      ['test_entity', 'entity_test:{bundle_argument}', $access, $access],
+      ['test_entity', 'entity_test:{bundle_argument}', $no_access, $no_access],
+      ['', 'entity_test:{bundle_argument}', $no_access, $no_access, FALSE],
       // When the bundle is not provided, access should be denied even if the
       // access control handler would allow access.
-      array('', 'entity_test:{bundle_argument}', $access, $no_access, FALSE),
-    );
+      ['', 'entity_test:{bundle_argument}', $access, $no_access, FALSE],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityFormTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityFormTest.php
index 15fd2345920468fa610a215b6c6772814d0bdad9..4bed37da59215ebc269669ab85ff0b7027ccbdf2 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityFormTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityFormTest.php
@@ -52,7 +52,7 @@ protected function setUp() {
   public function testFormId($expected, $definition) {
     $this->entityType->set('entity_keys', ['bundle' => $definition['bundle']]);
 
-    $entity = $this->getMockForAbstractClass('Drupal\Core\Entity\Entity', array(array(), $definition['entity_type']), '', TRUE, TRUE, TRUE, array('getEntityType', 'bundle'));
+    $entity = $this->getMockForAbstractClass('Drupal\Core\Entity\Entity', [[], $definition['entity_type']], '', TRUE, TRUE, TRUE, ['getEntityType', 'bundle']);
 
     $entity->expects($this->any())
       ->method('getEntityType')
@@ -71,33 +71,33 @@ public function testFormId($expected, $definition) {
    * Provides test data for testFormId().
    */
   public function providerTestFormIds() {
-    return array(
-      array('node_article_form', array(
+    return [
+      ['node_article_form', [
         'entity_type' => 'node',
         'bundle' => 'article',
         'operation' => 'default',
-      )),
-      array('node_article_delete_form', array(
+      ]],
+      ['node_article_delete_form', [
         'entity_type' => 'node',
         'bundle' => 'article',
         'operation' => 'delete',
-      )),
-      array('user_user_form', array(
+      ]],
+      ['user_user_form', [
         'entity_type' => 'user',
         'bundle' => 'user',
         'operation' => 'default',
-      )),
-      array('user_form', array(
+      ]],
+      ['user_form', [
         'entity_type' => 'user',
         'bundle' => '',
         'operation' => 'default',
-      )),
-      array('user_delete_form', array(
+      ]],
+      ['user_delete_form', [
         'entity_type' => 'user',
         'bundle' => '',
         'operation' => 'delete',
-      )),
-    );
+      ]],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityListBuilderTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityListBuilderTest.php
index f5c12649b42ae6e0fb78893597c7e0e17006fb41..44e771ceaa5b4e9dd02d67a2f2d50e84b5ba72f4 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityListBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityListBuilderTest.php
@@ -90,14 +90,14 @@ protected function setUp() {
    */
   public function testGetOperations() {
     $operation_name = $this->randomMachineName();
-    $operations = array(
-      $operation_name => array(
+    $operations = [
+      $operation_name => [
         'title' => $this->randomMachineName(),
-      ),
-    );
+      ],
+    ];
     $this->moduleHandler->expects($this->once())
       ->method('invokeAll')
-      ->with('entity_operation', array($this->role))
+      ->with('entity_operation', [$this->role])
       ->will($this->returnValue($operations));
     $this->moduleHandler->expects($this->once())
       ->method('alter')
@@ -116,7 +116,7 @@ public function testGetOperations() {
       ->getMock();
     $url->expects($this->any())
       ->method('toArray')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->role->expects($this->any())
       ->method('urlInfo')
       ->will($this->returnValue($url));
@@ -141,7 +141,7 @@ public function testGetOperations() {
 
 class TestEntityListBuilder extends EntityTestListBuilder {
   public function buildOperations(EntityInterface $entity) {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityRepositoryTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityRepositoryTest.php
index 83692483ead9fbad809b5d079588ce2d0664fa4c..688dd75b9b5e2217b919d182610c29cd33214457 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityRepositoryTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityRepositoryTest.php
@@ -63,7 +63,7 @@ public function testGetTranslationFromContext() {
     $this->languageManager->getFallbackCandidates(Argument::type('array'))
       ->will(function ($args) {
         $context = $args[0];
-        $candidates = array();
+        $candidates = [];
         if (!empty($context['langcode'])) {
           $candidates[$context['langcode']] = $context['langcode'];
         }
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityResolverManagerTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityResolverManagerTest.php
index 6e164708b94d11b12f5dd5a59be980a09c2f6d89..d2e5eae318af654615c5782cbe3711af7fa31f4e 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityResolverManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityResolverManagerTest.php
@@ -74,9 +74,9 @@ protected function setUp() {
    * @dataProvider providerTestSetRouteOptionsWithStandardRoute
    */
   public function testSetRouteOptionsWithStandardRoute($controller) {
-    $route = new Route('/example', array(
+    $route = new Route('/example', [
       '_controller' => $controller,
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
@@ -88,10 +88,10 @@ public function testSetRouteOptionsWithStandardRoute($controller) {
    * Data provider for testSetRouteOptionsWithStandardRoute.
    */
   public function providerTestSetRouteOptionsWithStandardRoute() {
-    return array(
-      array('Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethod'),
-      array('Drupal\Tests\Core\Entity\test_function_controller'),
-    );
+    return [
+      ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethod'],
+      ['Drupal\Tests\Core\Entity\test_function_controller'],
+    ];
   }
 
   /**
@@ -103,10 +103,10 @@ public function providerTestSetRouteOptionsWithStandardRoute() {
    * @dataProvider providerTestSetRouteOptionsWithStandardRouteWithArgument
    */
   public function testSetRouteOptionsWithStandardRouteWithArgument($controller) {
-    $route = new Route('/example/{argument}', array(
+    $route = new Route('/example/{argument}', [
       '_controller' => $controller,
       'argument' => 'test',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
@@ -118,10 +118,10 @@ public function testSetRouteOptionsWithStandardRouteWithArgument($controller) {
    * Data provider for testSetRouteOptionsWithStandardRouteWithArgument.
    */
   public function providerTestSetRouteOptionsWithStandardRouteWithArgument() {
-    return array(
-      array('Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethodWithArgument'),
-      array('Drupal\Tests\Core\Entity\test_function_controller_with_argument'),
-    );
+    return [
+      ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethodWithArgument'],
+      ['Drupal\Tests\Core\Entity\test_function_controller_with_argument'],
+    ];
   }
 
   /**
@@ -133,10 +133,10 @@ public function providerTestSetRouteOptionsWithStandardRouteWithArgument() {
    * @dataProvider providerTestSetRouteOptionsWithContentController
    */
   public function testSetRouteOptionsWithContentController($controller) {
-    $route = new Route('/example/{argument}', array(
+    $route = new Route('/example/{argument}', [
       '_controller' => $controller,
       'argument' => 'test',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
@@ -148,10 +148,10 @@ public function testSetRouteOptionsWithContentController($controller) {
    * Data provider for testSetRouteOptionsWithContentController.
    */
   public function providerTestSetRouteOptionsWithContentController() {
-    return array(
-      array('Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethodWithArgument'),
-      array('Drupal\Tests\Core\Entity\test_function_controller_with_argument'),
-    );
+    return [
+      ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethodWithArgument'],
+      ['Drupal\Tests\Core\Entity\test_function_controller_with_argument'],
+    ];
   }
 
   /**
@@ -167,9 +167,9 @@ public function providerTestSetRouteOptionsWithContentController() {
   public function testSetRouteOptionsWithEntityTypeNoUpcasting($controller) {
     $this->setupEntityTypes();
 
-    $route = new Route('/example/{entity_test}', array(
+    $route = new Route('/example/{entity_test}', [
       '_controller' => $controller,
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
@@ -181,10 +181,10 @@ public function testSetRouteOptionsWithEntityTypeNoUpcasting($controller) {
    * Data provider for testSetRouteOptionsWithEntityTypeNoUpcasting.
    */
   public function providerTestSetRouteOptionsWithEntityTypeNoUpcasting() {
-    return array(
-      array('Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerWithEntityNoUpcasting'),
-      array('Drupal\Tests\Core\Entity\test_function_controller_no_upcasting'),
-    );
+    return [
+      ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerWithEntityNoUpcasting'],
+      ['Drupal\Tests\Core\Entity\test_function_controller_no_upcasting'],
+    ];
   }
 
   /**
@@ -200,25 +200,25 @@ public function providerTestSetRouteOptionsWithEntityTypeNoUpcasting() {
   public function testSetRouteOptionsWithEntityTypeUpcasting($controller) {
     $this->setupEntityTypes();
 
-    $route = new Route('/example/{entity_test}', array(
+    $route = new Route('/example/{entity_test}', [
       '_controller' => $controller,
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
     $this->assertEquals($defaults, $route->getDefaults());
     $parameters = $route->getOption('parameters');
-    $this->assertEquals(array('entity_test' => array('type' => 'entity:entity_test')), $parameters);
+    $this->assertEquals(['entity_test' => ['type' => 'entity:entity_test']], $parameters);
   }
 
   /**
    * Data provider for testSetRouteOptionsWithEntityTypeUpcasting.
    */
   public function providerTestSetRouteOptionsWithEntityTypeUpcasting() {
-    return array(
-      array('Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerWithEntityUpcasting'),
-      array('Drupal\Tests\Core\Entity\test_function_controller_entity_upcasting'),
-    );
+    return [
+      ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerWithEntityUpcasting'],
+      ['Drupal\Tests\Core\Entity\test_function_controller_entity_upcasting'],
+    ];
   }
 
   /**
@@ -232,15 +232,15 @@ public function providerTestSetRouteOptionsWithEntityTypeUpcasting() {
   public function testSetRouteOptionsWithEntityFormUpcasting() {
     $this->setupEntityTypes();
 
-    $route = new Route('/example/{entity_test}', array(
+    $route = new Route('/example/{entity_test}', [
       '_form' => 'Drupal\Tests\Core\Entity\BasicForm',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
     $this->assertEquals($defaults, $route->getDefaults());
     $parameters = $route->getOption('parameters');
-    $this->assertEquals(array('entity_test' => array('type' => 'entity:entity_test')), $parameters);
+    $this->assertEquals(['entity_test' => ['type' => 'entity:entity_test']], $parameters);
   }
 
   /**
@@ -254,15 +254,15 @@ public function testSetRouteOptionsWithEntityFormUpcasting() {
   public function testSetRouteOptionsWithEntityUpcastingNoCreate() {
     $this->setupEntityTypes();
 
-    $route = new Route('/example/{entity_test}', array(
+    $route = new Route('/example/{entity_test}', [
       '_form' => 'Drupal\Tests\Core\Entity\BasicFormNoContainerInjectionInterface',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
     $this->assertEquals($defaults, $route->getDefaults());
     $parameters = $route->getOption('parameters');
-    $this->assertEquals(array('entity_test' => array('type' => 'entity:entity_test')), $parameters);
+    $this->assertEquals(['entity_test' => ['type' => 'entity:entity_test']], $parameters);
   }
 
   /**
@@ -276,9 +276,9 @@ public function testSetRouteOptionsWithEntityUpcastingNoCreate() {
   public function testSetRouteOptionsWithEntityFormNoUpcasting() {
     $this->setupEntityTypes();
 
-    $route = new Route('/example/{entity_test}', array(
+    $route = new Route('/example/{entity_test}', [
       '_form' => 'Drupal\Tests\Core\Entity\BasicFormNoUpcasting',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
@@ -298,24 +298,24 @@ public function testSetRouteOptionsWithEntityFormNoUpcasting() {
   public function testSetRouteOptionsWithEntityViewRouteAndManualParameters() {
     $this->setupEntityTypes();
     $route = new Route('/example/{foo}',
-      array(
+      [
         '_entity_view' => 'entity_test.view',
-      ),
-      array(),
-      array(
-        'parameters' => array(
-          'foo' => array(
+      ],
+      [],
+      [
+        'parameters' => [
+          'foo' => [
             'type' => 'entity:entity_test',
-          ),
-        ),
-      )
+          ],
+        ],
+      ]
     );
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
     $this->assertEquals($defaults, $route->getDefaults());
     $parameters = $route->getOption('parameters');
-    $this->assertEquals(array('foo' => array('type' => 'entity:entity_test')), $parameters);
+    $this->assertEquals(['foo' => ['type' => 'entity:entity_test']], $parameters);
   }
 
   /**
@@ -329,15 +329,15 @@ public function testSetRouteOptionsWithEntityViewRouteAndManualParameters() {
    */
   public function testSetRouteOptionsWithEntityViewRoute() {
     $this->setupEntityTypes();
-    $route = new Route('/example/{entity_test}', array(
+    $route = new Route('/example/{entity_test}', [
       '_entity_view' => 'entity_test.view',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
     $this->assertEquals($defaults, $route->getDefaults());
     $parameters = $route->getOption('parameters');
-    $this->assertEquals(array('entity_test' => array('type' => 'entity:entity_test')), $parameters);
+    $this->assertEquals(['entity_test' => ['type' => 'entity:entity_test']], $parameters);
   }
 
   /**
@@ -351,9 +351,9 @@ public function testSetRouteOptionsWithEntityViewRoute() {
    */
   public function testSetRouteOptionsWithEntityListRoute() {
     $this->setupEntityTypes();
-    $route = new Route('/example/{entity_test}', array(
+    $route = new Route('/example/{entity_test}', [
       '_entity_list' => 'entity_test',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
@@ -373,15 +373,15 @@ public function testSetRouteOptionsWithEntityListRoute() {
    */
   public function testSetRouteOptionsWithEntityFormRoute() {
     $this->setupEntityTypes();
-    $route = new Route('/example/{entity_test}', array(
+    $route = new Route('/example/{entity_test}', [
       '_entity_form' => 'entity_test.edit',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
     $this->assertEquals($defaults, $route->getDefaults());
     $parameters = $route->getOption('parameters');
-    $this->assertEquals(array('entity_test' => array('type' => 'entity:entity_test')), $parameters);
+    $this->assertEquals(['entity_test' => ['type' => 'entity:entity_test']], $parameters);
   }
 
   /**
@@ -427,9 +427,9 @@ public function testSetRouteOptionsWithEntityFormRouteAndArgument() {
    */
   public function testSetRouteOptionsWithEntityAddFormRoute() {
     $this->setupEntityTypes();
-    $route = new Route('/example/add', array(
+    $route = new Route('/example/add', [
       '_entity_form' => 'entity_test.add',
-    ));
+    ]);
 
     $defaults = $route->getDefaults();
     $this->entityResolverManager->setRouteOptions($route);
@@ -447,9 +447,9 @@ protected function setupEntityTypes() {
       ->will($this->returnValue('Drupal\Tests\Core\Entity\SimpleTestEntity'));
     $this->entityManager->expects($this->any())
       ->method('getDefinitions')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'entity_test' => $definition,
-      )));
+      ]));
     $this->entityManager->expects($this->any())
       ->method('getDefinition')
       ->will($this->returnCallback(function ($entity_type) use ($definition) {
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php
index 06cf5e11dc14ae63c281c2b726cda14ae732f001..6668f1ba55cb1d52e0383eaff495af41c0f6a0e4 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php
@@ -22,9 +22,9 @@ class EntityTypeTest extends UnitTestCase {
    * @return \Drupal\Core\Entity\EntityTypeInterface
    */
   protected function setUpEntityType($definition) {
-    $definition += array(
+    $definition += [
       'id' => 'example_entity_type',
-    );
+    ];
     return new EntityType($definition);
   }
 
@@ -57,7 +57,7 @@ public function testSet($key, $value) {
    * @dataProvider providerTestGetKeys
    */
   public function testGetKeys($entity_keys, $expected) {
-    $entity_type = $this->setUpEntityType(array('entity_keys' => $entity_keys));
+    $entity_type = $this->setUpEntityType(['entity_keys' => $entity_keys]);
     $this->assertSame($expected + ['default_langcode' => 'default_langcode'], $entity_type->getKeys());
   }
 
@@ -67,7 +67,7 @@ public function testGetKeys($entity_keys, $expected) {
    * @dataProvider providerTestGetKeys
    */
   public function testGetKey($entity_keys, $expected) {
-    $entity_type = $this->setUpEntityType(array('entity_keys' => $entity_keys));
+    $entity_type = $this->setUpEntityType(['entity_keys' => $entity_keys]);
     $this->assertSame($expected['bundle'], $entity_type->getKey('bundle'));
     $this->assertSame(FALSE, $entity_type->getKey('bananas'));
   }
@@ -78,7 +78,7 @@ public function testGetKey($entity_keys, $expected) {
    * @dataProvider providerTestGetKeys
    */
   public function testHasKey($entity_keys, $expected) {
-    $entity_type = $this->setUpEntityType(array('entity_keys' => $entity_keys));
+    $entity_type = $this->setUpEntityType(['entity_keys' => $entity_keys]);
     $this->assertSame(!empty($expected['bundle']), $entity_type->hasKey('bundle'));
     $this->assertSame(!empty($expected['id']), $entity_type->hasKey('id'));
     $this->assertSame(FALSE, $entity_type->hasKey('bananas'));
@@ -116,22 +116,22 @@ public function providerTestSet() {
    * Provides test data.
    */
   public function providerTestGetKeys() {
-    return array(
-      array(array(), array('revision' => '', 'bundle' => '', 'langcode' => '')),
-      array(array('id' => 'id'), array('id' => 'id', 'revision' => '', 'bundle' => '', 'langcode' => '')),
-      array(array('bundle' => 'bundle'), array('bundle' => 'bundle', 'revision' => '', 'langcode' => '')),
-    );
+    return [
+      [[], ['revision' => '', 'bundle' => '', 'langcode' => '']],
+      [['id' => 'id'], ['id' => 'id', 'revision' => '', 'bundle' => '', 'langcode' => '']],
+      [['bundle' => 'bundle'], ['bundle' => 'bundle', 'revision' => '', 'langcode' => '']],
+    ];
   }
 
   /**
    * Tests the isRevisionable() method.
    */
   public function testIsRevisionable() {
-    $entity_type = $this->setUpEntityType(array('entity_keys' => array('id' => 'id')));
+    $entity_type = $this->setUpEntityType(['entity_keys' => ['id' => 'id']]);
     $this->assertFalse($entity_type->isRevisionable());
-    $entity_type = $this->setUpEntityType(array('entity_keys' => array('id' => 'id', 'revision' => FALSE)));
+    $entity_type = $this->setUpEntityType(['entity_keys' => ['id' => 'id', 'revision' => FALSE]]);
     $this->assertFalse($entity_type->isRevisionable());
-    $entity_type = $this->setUpEntityType(array('entity_keys' => array('id' => 'id', 'revision' => TRUE)));
+    $entity_type = $this->setUpEntityType(['entity_keys' => ['id' => 'id', 'revision' => TRUE]]);
     $this->assertTrue($entity_type->isRevisionable());
   }
 
@@ -140,14 +140,14 @@ public function testIsRevisionable() {
    */
   public function testGetHandler() {
     $controller = $this->getTestHandlerClass();
-    $entity_type = $this->setUpEntityType(array(
-      'handlers' => array(
+    $entity_type = $this->setUpEntityType([
+      'handlers' => [
         'storage' => $controller,
-        'form' => array(
+        'form' => [
           'default' => $controller,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $this->assertSame($controller, $entity_type->getHandlerClass('storage'));
     $this->assertSame($controller, $entity_type->getHandlerClass('form', 'default'));
   }
@@ -157,11 +157,11 @@ public function testGetHandler() {
    */
   public function testGetStorageClass() {
     $controller = $this->getTestHandlerClass();
-    $entity_type = $this->setUpEntityType(array(
-      'handlers' => array(
+    $entity_type = $this->setUpEntityType([
+      'handlers' => [
         'storage' => $controller,
-      ),
-    ));
+      ],
+    ]);
     $this->assertSame($controller, $entity_type->getStorageClass());
   }
 
@@ -170,7 +170,7 @@ public function testGetStorageClass() {
    */
   public function testSetStorageClass() {
     $controller = $this->getTestHandlerClass();
-    $entity_type = $this->setUpEntityType(array());
+    $entity_type = $this->setUpEntityType([]);
     $this->assertSame($entity_type, $entity_type->setStorageClass($controller));
   }
 
@@ -179,11 +179,11 @@ public function testSetStorageClass() {
    */
   public function testGetListBuilderClass() {
     $controller = $this->getTestHandlerClass();
-    $entity_type = $this->setUpEntityType(array(
-      'handlers' => array(
+    $entity_type = $this->setUpEntityType([
+      'handlers' => [
         'list_builder' => $controller,
-      ),
-    ));
+      ],
+    ]);
     $this->assertSame($controller, $entity_type->getListBuilderClass());
   }
 
@@ -192,11 +192,11 @@ public function testGetListBuilderClass() {
    */
   public function testGetAccessControlClass() {
     $controller = $this->getTestHandlerClass();
-    $entity_type = $this->setUpEntityType(array(
-      'handlers' => array(
+    $entity_type = $this->setUpEntityType([
+      'handlers' => [
         'access' => $controller,
-      ),
-    ));
+      ],
+    ]);
     $this->assertSame($controller, $entity_type->getAccessControlClass());
   }
 
@@ -206,13 +206,13 @@ public function testGetAccessControlClass() {
   public function testGetFormClass() {
     $controller = $this->getTestHandlerClass();
     $operation = 'default';
-    $entity_type = $this->setUpEntityType(array(
-      'handlers' => array(
-        'form' => array(
+    $entity_type = $this->setUpEntityType([
+      'handlers' => [
+        'form' => [
           $operation => $controller,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     $this->assertSame($controller, $entity_type->getFormClass($operation));
   }
 
@@ -222,16 +222,16 @@ public function testGetFormClass() {
   public function testHasFormClasses() {
     $controller = $this->getTestHandlerClass();
     $operation = 'default';
-    $entity_type1 = $this->setUpEntityType(array(
-      'handlers' => array(
-        'form' => array(
+    $entity_type1 = $this->setUpEntityType([
+      'handlers' => [
+        'form' => [
           $operation => $controller,
-        ),
-      ),
-    ));
-    $entity_type2 = $this->setUpEntityType(array(
-      'handlers' => array(),
-    ));
+        ],
+      ],
+    ]);
+    $entity_type2 = $this->setUpEntityType([
+      'handlers' => [],
+    ]);
     $this->assertTrue($entity_type1->hasFormClasses());
     $this->assertFalse($entity_type2->hasFormClasses());
   }
@@ -241,11 +241,11 @@ public function testHasFormClasses() {
    */
   public function testGetViewBuilderClass() {
     $controller = $this->getTestHandlerClass();
-    $entity_type = $this->setUpEntityType(array(
-      'handlers' => array(
+    $entity_type = $this->setUpEntityType([
+      'handlers' => [
         'view_builder' => $controller,
-      ),
-    ));
+      ],
+    ]);
     $this->assertSame($controller, $entity_type->getViewBuilderClass());
   }
 
@@ -256,7 +256,7 @@ public function testIdExceedsMaxLength() {
     $id = $this->randomMachineName(33);
     $message = 'Attempt to create an entity type with an ID longer than 32 characters: ' . $id;
     $this->setExpectedException('Drupal\Core\Entity\Exception\EntityTypeIdLengthException', $message);
-    $this->setUpEntityType(array('id' => $id));
+    $this->setUpEntityType(['id' => $id]);
   }
 
   /**
@@ -264,7 +264,7 @@ public function testIdExceedsMaxLength() {
    */
   public function testgetOriginalClassUnchanged() {
     $class = $this->randomMachineName();
-    $entity_type = $this->setUpEntityType(array('class' => $class));
+    $entity_type = $this->setUpEntityType(['class' => $class]);
     $this->assertEquals($class, $entity_type->getOriginalClass());
   }
 
@@ -274,7 +274,7 @@ public function testgetOriginalClassUnchanged() {
    */
   public function testgetOriginalClassChanged() {
     $class = $this->randomMachineName();
-    $entity_type = $this->setUpEntityType(array('class' => $class));
+    $entity_type = $this->setUpEntityType(['class' => $class]);
     $entity_type->setClass($this->randomMachineName());
     $this->assertEquals($class, $entity_type->getOriginalClass());
   }
@@ -284,7 +284,7 @@ public function testgetOriginalClassChanged() {
    */
   public function testId() {
     $id = $this->randomMachineName(32);
-    $entity_type = $this->setUpEntityType(array('id' => $id));
+    $entity_type = $this->setUpEntityType(['id' => $id]);
     $this->assertEquals($id, $entity_type->id());
   }
 
@@ -293,11 +293,11 @@ public function testId() {
    */
   public function testGetLabel() {
     $translatable_label = new TranslatableMarkup($this->randomMachineName());
-    $entity_type = $this->setUpEntityType(array('label' => $translatable_label));
+    $entity_type = $this->setUpEntityType(['label' => $translatable_label]);
     $this->assertSame($translatable_label, $entity_type->getLabel());
 
     $label = $this->randomMachineName();
-    $entity_type = $this->setUpEntityType(array('label' => $label));
+    $entity_type = $this->setUpEntityType(['label' => $label]);
     $this->assertSame($label, $entity_type->getLabel());
   }
 
@@ -306,15 +306,15 @@ public function testGetLabel() {
    */
   public function testGetGroupLabel() {
     $translatable_group_label = new TranslatableMarkup($this->randomMachineName());
-    $entity_type = $this->setUpEntityType(array('group_label' => $translatable_group_label));
+    $entity_type = $this->setUpEntityType(['group_label' => $translatable_group_label]);
     $this->assertSame($translatable_group_label, $entity_type->getGroupLabel());
 
     $default_label = $this->randomMachineName();
-    $entity_type = $this->setUpEntityType(array('group_label' => $default_label));
+    $entity_type = $this->setUpEntityType(['group_label' => $default_label]);
     $this->assertSame($default_label, $entity_type->getGroupLabel());
 
-    $default_label = new TranslatableMarkup('Other', array(), array('context' => 'Entity type group'));
-    $entity_type = $this->setUpEntityType(array('group_label' => $default_label));
+    $default_label = new TranslatableMarkup('Other', [], ['context' => 'Entity type group']);
+    $entity_type = $this->setUpEntityType(['group_label' => $default_label]);
     $this->assertSame($default_label, $entity_type->getGroupLabel());
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityUnitTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityUnitTest.php
index f150e4fea63513abc30553cbf65afdbec8c0e4f1..69791613a0163348a2fd6f3de486313a5c41024e 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityUnitTest.php
@@ -82,17 +82,17 @@ class EntityUnitTest extends UnitTestCase {
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->values = array(
+    $this->values = [
       'id' => 1,
       'langcode' => 'en',
       'uuid' => '3bb9ee60-bea5-4622-b89b-a63319d10b3a',
-    );
+    ];
     $this->entityTypeId = $this->randomMachineName();
 
     $this->entityType = $this->getMock('\Drupal\Core\Entity\EntityTypeInterface');
     $this->entityType->expects($this->any())
       ->method('getListCacheTags')
-      ->willReturn(array($this->entityTypeId . '_list'));
+      ->willReturn([$this->entityTypeId . '_list']);
 
     $this->entityManager = $this->getMock('\Drupal\Core\Entity\EntityManagerInterface');
     $this->entityManager->expects($this->any())
@@ -106,7 +106,7 @@ protected function setUp() {
     $this->languageManager->expects($this->any())
       ->method('getLanguage')
       ->with('en')
-      ->will($this->returnValue(new Language(array('id' => 'en'))));
+      ->will($this->returnValue(new Language(['id' => 'en'])));
 
     $this->cacheTagsInvalidator = $this->getMock('Drupal\Core\Cache\CacheTagsInvalidator');
 
@@ -117,7 +117,7 @@ protected function setUp() {
     $container->set('cache_tags.invalidator', $this->cacheTagsInvalidator);
     \Drupal::setContainer($container);
 
-    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Entity\Entity', array($this->values, $this->entityTypeId));
+    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Entity\Entity', [$this->values, $this->entityTypeId]);
   }
 
   /**
@@ -175,7 +175,7 @@ public function testLabel() {
       ->will($this->returnValue($callback_label));
     $this->entityType->expects($this->at(0))
       ->method('getLabelCallback')
-      ->will($this->returnValue(array($callback_container, __FUNCTION__)));
+      ->will($this->returnValue([$callback_container, __FUNCTION__]));
     $this->entityType->expects($this->at(1))
       ->method('getLabelCallback')
       ->will($this->returnValue(NULL));
@@ -189,11 +189,11 @@ public function testLabel() {
     $this->entityManager->expects($this->at(1))
       ->method('getDefinition')
       ->with($this->entityTypeId)
-      ->will($this->returnValue(array(
-        'entity_keys' => array(
+      ->will($this->returnValue([
+        'entity_keys' => [
           'label' => 'label',
-        ),
-      )));
+        ],
+      ]));
     $this->entity->label = $property_label;
 
     $this->assertSame($callback_label, $this->entity->label());
@@ -226,9 +226,9 @@ public function testAccess() {
   public function testLanguage() {
     $this->entityType->expects($this->any())
       ->method('getKey')
-      ->will($this->returnValueMap(array(
-        array('langcode', 'langcode'),
-      )));
+      ->will($this->returnValueMap([
+        ['langcode', 'langcode'],
+      ]));
     $this->assertSame('en', $this->entity->language()->getId());
   }
 
@@ -298,8 +298,8 @@ public function testLoadMultiple() {
     $storage = $this->getMock('\Drupal\Core\Entity\EntityStorageInterface');
     $storage->expects($this->once())
       ->method('loadMultiple')
-      ->with(array(1))
-      ->will($this->returnValue(array(1 => $this->entity)));
+      ->with([1])
+      ->will($this->returnValue([1 => $this->entity]));
     $this->entityManager->expects($this->once())
       ->method('getStorage')
       ->with($this->entityTypeId)
@@ -307,7 +307,7 @@ public function testLoadMultiple() {
 
     // Call Entity::loadMultiple statically and check that it returns the mock
     // entity.
-    $this->assertSame(array(1 => $this->entity), $class_name::loadMultiple(array(1)));
+    $this->assertSame([1 => $this->entity], $class_name::loadMultiple([1]));
   }
 
   /**
@@ -325,7 +325,7 @@ public function testCreate() {
     $storage = $this->getMock('\Drupal\Core\Entity\EntityStorageInterface');
     $storage->expects($this->once())
       ->method('create')
-      ->with(array())
+      ->with([])
       ->will($this->returnValue($this->entity));
     $this->entityManager->expects($this->once())
       ->method('getStorage')
@@ -334,7 +334,7 @@ public function testCreate() {
 
     // Call Entity::create() statically and check that it returns the mock
     // entity.
-    $this->assertSame($this->entity, $class_name::create(array()));
+    $this->assertSame($this->entity, $class_name::create([]));
   }
 
   /**
@@ -391,15 +391,15 @@ public function testPreSave() {
   public function testPostSave() {
     $this->cacheTagsInvalidator->expects($this->at(0))
       ->method('invalidateTags')
-      ->with(array(
+      ->with([
         $this->entityTypeId . '_list', // List cache tag.
-      ));
+      ]);
     $this->cacheTagsInvalidator->expects($this->at(1))
       ->method('invalidateTags')
-      ->with(array(
+      ->with([
         $this->entityTypeId . ':' . $this->values['id'], // Own cache tag.
         $this->entityTypeId . '_list', // List cache tag.
-      ));
+      ]);
 
     // This method is internal, so check for errors on calling it only.
     $storage = $this->getMock('\Drupal\Core\Entity\EntityStorageInterface');
@@ -417,7 +417,7 @@ public function testPostSave() {
   public function testPreCreate() {
     // This method is internal, so check for errors on calling it only.
     $storage = $this->getMock('\Drupal\Core\Entity\EntityStorageInterface');
-    $values = array();
+    $values = [];
     // Our mocked entity->preCreate() returns NULL, so assert that.
     $this->assertNull($this->entity->preCreate($storage, $values));
   }
@@ -439,7 +439,7 @@ public function testPreDelete() {
     // This method is internal, so check for errors on calling it only.
     $storage = $this->getMock('\Drupal\Core\Entity\EntityStorageInterface');
     // Our mocked entity->preDelete() returns NULL, so assert that.
-    $this->assertNull($this->entity->preDelete($storage, array($this->entity)));
+    $this->assertNull($this->entity->preDelete($storage, [$this->entity]));
   }
 
   /**
@@ -448,16 +448,16 @@ public function testPreDelete() {
   public function testPostDelete() {
     $this->cacheTagsInvalidator->expects($this->once())
       ->method('invalidateTags')
-      ->with(array(
+      ->with([
         $this->entityTypeId . ':' . $this->values['id'],
         $this->entityTypeId . '_list',
-      ));
+      ]);
     $storage = $this->getMock('\Drupal\Core\Entity\EntityStorageInterface');
     $storage->expects($this->once())
       ->method('getEntityType')
       ->willReturn($this->entityType);
 
-    $entities = array($this->values['id'] => $this->entity);
+    $entities = [$this->values['id'] => $this->entity];
     $this->entity->postDelete($storage, $entities);
   }
 
@@ -467,7 +467,7 @@ public function testPostDelete() {
   public function testPostLoad() {
     // This method is internal, so check for errors on calling it only.
     $storage = $this->getMock('\Drupal\Core\Entity\EntityStorageInterface');
-    $entities = array($this->entity);
+    $entities = [$this->entity];
     // Our mocked entity->postLoad() returns NULL, so assert that.
     $this->assertNull($this->entity->postLoad($storage, $entities));
   }
@@ -476,7 +476,7 @@ public function testPostLoad() {
    * @covers ::referencedEntities
    */
   public function testReferencedEntities() {
-    $this->assertSame(array(), $this->entity->referencedEntities());
+    $this->assertSame([], $this->entity->referencedEntities());
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php b/core/tests/Drupal/Tests/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php
index 4fbdba396c254ec27e19976f1760fc1de3e74f47..49427014757eb17bad6534851fb19f406cf1393c 100644
--- a/core/tests/Drupal/Tests/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php
@@ -88,17 +88,17 @@ protected function setUp() {
   protected function setUpKeyValueEntityStorage($uuid_key = 'uuid') {
     $this->entityType->expects($this->atLeastOnce())
       ->method('getKey')
-      ->will($this->returnValueMap(array(
-        array('id', 'id'),
-        array('uuid', $uuid_key),
-        array('langcode', 'langcode'),
-      )));
+      ->will($this->returnValueMap([
+        ['id', 'id'],
+        ['uuid', $uuid_key],
+        ['langcode', 'langcode'],
+      ]));
     $this->entityType->expects($this->atLeastOnce())
       ->method('id')
       ->will($this->returnValue('test_entity_type'));
     $this->entityType->expects($this->any())
       ->method('getListCacheTags')
-      ->willReturn(array('test_entity_type_list'));
+      ->willReturn(['test_entity_type_list']);
 
     $this->entityManager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
     $this->entityManager->expects($this->any())
@@ -112,7 +112,7 @@ protected function setUpKeyValueEntityStorage($uuid_key = 'uuid') {
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $this->uuidService = $this->getMock('Drupal\Component\Uuid\UuidInterface');
     $this->languageManager = $this->getMock('Drupal\Core\Language\LanguageManagerInterface');
-    $language = new Language(array('langcode' => 'en'));
+    $language = new Language(['langcode' => 'en']);
     $this->languageManager->expects($this->any())
       ->method('getDefaultLanguage')
       ->will($this->returnValue($language));
@@ -149,7 +149,7 @@ public function testCreateWithPredefinedUuid() {
     $this->uuidService->expects($this->never())
       ->method('generate');
 
-    $entity = $this->entityStorage->create(array('id' => 'foo', 'uuid' => 'baz'));
+    $entity = $this->entityStorage->create(['id' => 'foo', 'uuid' => 'baz']);
     $this->assertInstanceOf('Drupal\Core\Entity\EntityInterface', $entity);
     $this->assertSame('foo', $entity->id());
     $this->assertSame('baz', $entity->uuid());
@@ -175,7 +175,7 @@ public function testCreateWithoutUuidKey() {
     $this->uuidService->expects($this->never())
       ->method('generate');
 
-    $entity = $this->entityStorage->create(array('id' => 'foo', 'uuid' => 'baz'));
+    $entity = $this->entityStorage->create(['id' => 'foo', 'uuid' => 'baz']);
     $this->assertInstanceOf('Drupal\Core\Entity\EntityInterface', $entity);
     $this->assertSame('foo', $entity->id());
     $this->assertSame('baz', $entity->uuid());
@@ -188,7 +188,7 @@ public function testCreateWithoutUuidKey() {
    * @return \Drupal\Core\Entity\EntityInterface
    */
   public function testCreate() {
-    $entity = $this->getMockEntity('Drupal\Core\Entity\Entity', array(), array('toArray'));
+    $entity = $this->getMockEntity('Drupal\Core\Entity\Entity', [], ['toArray']);
     $this->entityType->expects($this->once())
       ->method('getClass')
       ->will($this->returnValue(get_class($entity)));
@@ -204,7 +204,7 @@ public function testCreate() {
       ->method('generate')
       ->will($this->returnValue('bar'));
 
-    $entity = $this->entityStorage->create(array('id' => 'foo'));
+    $entity = $this->entityStorage->create(['id' => 'foo']);
     $this->assertInstanceOf('Drupal\Core\Entity\EntityInterface', $entity);
     $this->assertSame('foo', $entity->id());
     $this->assertSame('bar', $entity->uuid());
@@ -227,7 +227,7 @@ public function testSaveInsert(EntityInterface $entity) {
       ->will($this->returnValue(get_class($entity)));
     $this->setUpKeyValueEntityStorage();
 
-    $expected = array('id' => 'foo');
+    $expected = ['id' => 'foo'];
     $this->keyValueStore->expects($this->exactly(2))
       ->method('has')
       ->with('foo')
@@ -277,26 +277,26 @@ public function testSaveUpdate(EntityInterface $entity) {
       ->will($this->returnValue(get_class($entity)));
     $this->setUpKeyValueEntityStorage();
 
-    $expected = array('id' => 'foo');
+    $expected = ['id' => 'foo'];
     $this->keyValueStore->expects($this->exactly(2))
       ->method('has')
       ->with('foo')
       ->will($this->returnValue(TRUE));
     $this->keyValueStore->expects($this->once())
       ->method('getMultiple')
-      ->with(array('foo'))
-      ->will($this->returnValue(array(array('id' => 'foo'))));
+      ->with(['foo'])
+      ->will($this->returnValue([['id' => 'foo']]));
     $this->keyValueStore->expects($this->never())
       ->method('delete');
 
     $this->moduleHandler->expects($this->at(0))
       ->method('getImplementations')
       ->with('entity_load')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->moduleHandler->expects($this->at(1))
       ->method('getImplementations')
       ->with('test_entity_type_load')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->moduleHandler->expects($this->at(2))
       ->method('invokeAll')
       ->with('test_entity_type_presave');
@@ -324,15 +324,15 @@ public function testSaveUpdate(EntityInterface $entity) {
   public function testSaveConfigEntity() {
     $this->setUpKeyValueEntityStorage();
 
-    $entity = $this->getMockEntity('Drupal\Core\Config\Entity\ConfigEntityBase', array(array('id' => 'foo')), array(
+    $entity = $this->getMockEntity('Drupal\Core\Config\Entity\ConfigEntityBase', [['id' => 'foo']], [
       'toArray',
       'preSave',
-    ));
+    ]);
     $entity->enforceIsNew();
     // When creating a new entity, the ID is tracked as the original ID.
     $this->assertSame('foo', $entity->getOriginalId());
 
-    $expected = array('id' => 'foo');
+    $expected = ['id' => 'foo'];
     $entity->expects($this->once())
       ->method('toArray')
       ->will($this->returnValue($expected));
@@ -367,12 +367,12 @@ public function testSaveRenameConfigEntity(ConfigEntityInterface $entity) {
     $this->moduleHandler->expects($this->at(0))
       ->method('getImplementations')
       ->with('entity_load')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->moduleHandler->expects($this->at(1))
       ->method('getImplementations')
       ->with('test_entity_type_load')
-      ->will($this->returnValue(array()));
-    $expected = array('id' => 'foo');
+      ->will($this->returnValue([]));
+    $expected = ['id' => 'foo'];
     $entity->expects($this->once())
       ->method('toArray')
       ->will($this->returnValue($expected));
@@ -382,8 +382,8 @@ public function testSaveRenameConfigEntity(ConfigEntityInterface $entity) {
       ->will($this->returnValue(TRUE));
     $this->keyValueStore->expects($this->once())
       ->method('getMultiple')
-      ->with(array('foo'))
-      ->will($this->returnValue(array(array('id' => 'foo'))));
+      ->with(['foo'])
+      ->will($this->returnValue([['id' => 'foo']]));
     $this->keyValueStore->expects($this->once())
       ->method('delete')
       ->with('foo');
@@ -408,12 +408,12 @@ public function testSaveRenameConfigEntity(ConfigEntityInterface $entity) {
   public function testSaveContentEntity() {
     $this->entityType->expects($this->any())
       ->method('getKeys')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'id' => 'id',
-      )));
+      ]));
     $this->setUpKeyValueEntityStorage();
 
-    $expected = array('id' => 'foo');
+    $expected = ['id' => 'foo'];
     $this->keyValueStore->expects($this->exactly(2))
       ->method('has')
       ->with('foo')
@@ -423,10 +423,10 @@ public function testSaveContentEntity() {
       ->with('foo', $expected);
     $this->keyValueStore->expects($this->never())
       ->method('delete');
-    $entity = $this->getMockEntity('Drupal\Core\Entity\ContentEntityBase', array(), array(
+    $entity = $this->getMockEntity('Drupal\Core\Entity\ContentEntityBase', [], [
       'toArray',
       'id',
-    ));
+    ]);
     $entity->expects($this->atLeastOnce())
       ->method('id')
       ->will($this->returnValue('foo'));
@@ -466,7 +466,7 @@ public function testSaveInvalid() {
   public function testSaveDuplicate() {
     $this->setUpKeyValueEntityStorage();
 
-    $entity = $this->getMockEntity('Drupal\Core\Entity\Entity', array(array('id' => 'foo')));
+    $entity = $this->getMockEntity('Drupal\Core\Entity\Entity', [['id' => 'foo']]);
     $entity->enforceIsNew();
     $this->keyValueStore->expects($this->once())
       ->method('has')
@@ -491,16 +491,16 @@ public function testLoad() {
 
     $this->keyValueStore->expects($this->once())
       ->method('getMultiple')
-      ->with(array('foo'))
-      ->will($this->returnValue(array(array('id' => 'foo'))));
+      ->with(['foo'])
+      ->will($this->returnValue([['id' => 'foo']]));
     $this->moduleHandler->expects($this->at(0))
       ->method('getImplementations')
       ->with('entity_load')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->moduleHandler->expects($this->at(1))
       ->method('getImplementations')
       ->with('test_entity_type_load')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $entity = $this->entityStorage->load('foo');
     $this->assertInstanceOf('Drupal\Core\Entity\EntityInterface', $entity);
     $this->assertSame('foo', $entity->id());
@@ -516,8 +516,8 @@ public function testLoadMissingEntity() {
 
     $this->keyValueStore->expects($this->once())
       ->method('getMultiple')
-      ->with(array('foo'))
-      ->will($this->returnValue(array()));
+      ->with(['foo'])
+      ->will($this->returnValue([]));
     $this->moduleHandler->expects($this->never())
       ->method('getImplementations');
     $entity = $this->entityStorage->load('foo');
@@ -531,8 +531,8 @@ public function testLoadMissingEntity() {
    * @covers ::doLoadMultiple
    */
   public function testLoadMultipleAll() {
-    $expected['foo'] = $this->getMockEntity('Drupal\Core\Entity\Entity', array(array('id' => 'foo')));
-    $expected['bar'] = $this->getMockEntity('Drupal\Core\Entity\Entity', array(array('id' => 'bar')));
+    $expected['foo'] = $this->getMockEntity('Drupal\Core\Entity\Entity', [['id' => 'foo']]);
+    $expected['bar'] = $this->getMockEntity('Drupal\Core\Entity\Entity', [['id' => 'bar']]);
     $this->entityType->expects($this->once())
       ->method('getClass')
       ->will($this->returnValue(get_class(reset($expected))));
@@ -540,15 +540,15 @@ public function testLoadMultipleAll() {
 
     $this->keyValueStore->expects($this->once())
       ->method('getAll')
-      ->will($this->returnValue(array(array('id' => 'foo'), array('id' => 'bar'))));
+      ->will($this->returnValue([['id' => 'foo'], ['id' => 'bar']]));
     $this->moduleHandler->expects($this->at(0))
       ->method('getImplementations')
       ->with('entity_load')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->moduleHandler->expects($this->at(1))
       ->method('getImplementations')
       ->with('test_entity_type_load')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $entities = $this->entityStorage->loadMultiple();
     foreach ($entities as $id => $entity) {
       $this->assertInstanceOf('Drupal\Core\Entity\EntityInterface', $entity);
@@ -564,7 +564,7 @@ public function testLoadMultipleAll() {
    * @covers ::doLoadMultiple
    */
   public function testLoadMultipleIds() {
-    $entity = $this->getMockEntity('Drupal\Core\Entity\Entity', array(array('id' => 'foo')));
+    $entity = $this->getMockEntity('Drupal\Core\Entity\Entity', [['id' => 'foo']]);
     $this->entityType->expects($this->once())
       ->method('getClass')
       ->will($this->returnValue(get_class($entity)));
@@ -573,17 +573,17 @@ public function testLoadMultipleIds() {
     $expected[] = $entity;
     $this->keyValueStore->expects($this->once())
       ->method('getMultiple')
-      ->with(array('foo'))
-      ->will($this->returnValue(array(array('id' => 'foo'))));
+      ->with(['foo'])
+      ->will($this->returnValue([['id' => 'foo']]));
     $this->moduleHandler->expects($this->at(0))
       ->method('getImplementations')
       ->with('entity_load')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->moduleHandler->expects($this->at(1))
       ->method('getImplementations')
       ->with('test_entity_type_load')
-      ->will($this->returnValue(array()));
-    $entities = $this->entityStorage->loadMultiple(array('foo'));
+      ->will($this->returnValue([]));
+    $entities = $this->entityStorage->loadMultiple(['foo']);
     foreach ($entities as $id => $entity) {
       $this->assertInstanceOf('Drupal\Core\Entity\EntityInterface', $entity);
       $this->assertSame($id, $entity->id());
@@ -613,8 +613,8 @@ public function testDeleteRevision() {
    * @covers ::doDelete
    */
   public function testDelete() {
-    $entities['foo'] = $this->getMockEntity('Drupal\Core\Entity\Entity', array(array('id' => 'foo')));
-    $entities['bar'] = $this->getMockEntity('Drupal\Core\Entity\Entity', array(array('id' => 'bar')));
+    $entities['foo'] = $this->getMockEntity('Drupal\Core\Entity\Entity', [['id' => 'foo']]);
+    $entities['bar'] = $this->getMockEntity('Drupal\Core\Entity\Entity', [['id' => 'bar']]);
     $this->entityType->expects($this->once())
       ->method('getClass')
       ->will($this->returnValue(get_class(reset($entities))));
@@ -647,7 +647,7 @@ public function testDelete() {
 
     $this->keyValueStore->expects($this->once())
       ->method('deleteMultiple')
-      ->with(array('foo', 'bar'));
+      ->with(['foo', 'bar']);
     $this->entityStorage->delete($entities);
   }
 
@@ -665,7 +665,7 @@ public function testDeleteNothing() {
     $this->keyValueStore->expects($this->never())
       ->method('deleteMultiple');
 
-    $this->entityStorage->delete(array());
+    $this->entityStorage->delete([]);
   }
 
   /**
@@ -682,11 +682,11 @@ public function testDeleteNothing() {
    *
    * @return \Drupal\Core\Entity\EntityInterface|\PHPUnit_Framework_MockObject_MockObject
    */
-  public function getMockEntity($class = 'Drupal\Core\Entity\Entity', array $arguments = array(), $methods = array()) {
+  public function getMockEntity($class = 'Drupal\Core\Entity\Entity', array $arguments = [], $methods = []) {
     // Ensure the entity is passed at least an array of values and an entity
     // type ID
     if (!isset($arguments[0])) {
-      $arguments[0] = array();
+      $arguments[0] = [];
     }
     if (!isset($arguments[1])) {
       $arguments[1] = 'test_entity_type';
diff --git a/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php b/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php
index 1ce87c5402154cfa9a977d7de68efdb55cb4f746..aecc3e43640bd0531048593bac5a9d9f02f0603b 100644
--- a/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php
@@ -70,13 +70,13 @@ protected function setUp() {
 
     // Add an ID field. This also acts as a test for a simple, single-column
     // field.
-    $this->setUpStorageDefinition('id', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('id', [
+      'columns' => [
+        'value' => [
           'type' => 'int',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
   }
 
   /**
@@ -95,277 +95,277 @@ protected function setUp() {
    * @covers ::processIdentifierSchema
    */
   public function testGetSchemaBase() {
-    $this->entityType = new ContentEntityType(array(
+    $this->entityType = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array('id' => 'id'),
-    ));
+      'entity_keys' => ['id' => 'id'],
+    ]);
 
     // Add a field with a 'length' constraint.
-    $this->setUpStorageDefinition('name', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('name', [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => 255,
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     // Add a multi-column field.
-    $this->setUpStorageDefinition('description', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('description', [
+      'columns' => [
+        'value' => [
           'type' => 'text',
-        ),
-        'format' => array(
+        ],
+        'format' => [
           'type' => 'varchar',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
     // Add a field with a unique key.
-    $this->setUpStorageDefinition('uuid', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('uuid', [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => 128,
-        ),
-      ),
-      'unique keys' => array(
-        'value' => array('value'),
-      ),
-    ));
+        ],
+      ],
+      'unique keys' => [
+        'value' => ['value'],
+      ],
+    ]);
     // Add a field with a unique key, specified as column name and length.
-    $this->setUpStorageDefinition('hash', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('hash', [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
           'length' => 20,
-        ),
-      ),
-      'unique keys' => array(
-        'value' => array(array('value', 10)),
-      ),
-    ));
+        ],
+      ],
+      'unique keys' => [
+        'value' => [['value', 10]],
+      ],
+    ]);
     // Add a field with a multi-column unique key.
-    $this->setUpStorageDefinition('email', array(
-      'columns' => array(
-        'username' => array(
+    $this->setUpStorageDefinition('email', [
+      'columns' => [
+        'username' => [
           'type' => 'varchar',
-        ),
-        'hostname' => array(
+        ],
+        'hostname' => [
           'type' => 'varchar',
-        ),
-        'domain' => array(
+        ],
+        'domain' => [
           'type' => 'varchar',
-        )
-      ),
-      'unique keys' => array(
-        'email' => array('username', 'hostname', array('domain', 3)),
-      ),
-    ));
+        ]
+      ],
+      'unique keys' => [
+        'email' => ['username', 'hostname', ['domain', 3]],
+      ],
+    ]);
     // Add a field with an index.
-    $this->setUpStorageDefinition('owner', array(
-      'columns' => array(
-        'target_id' => array(
+    $this->setUpStorageDefinition('owner', [
+      'columns' => [
+        'target_id' => [
           'type' => 'int',
-        ),
-      ),
-      'indexes' => array(
-        'target_id' => array('target_id'),
-      ),
-    ));
+        ],
+      ],
+      'indexes' => [
+        'target_id' => ['target_id'],
+      ],
+    ]);
     // Add a field with an index, specified as column name and length.
-    $this->setUpStorageDefinition('translator', array(
-      'columns' => array(
-        'target_id' => array(
+    $this->setUpStorageDefinition('translator', [
+      'columns' => [
+        'target_id' => [
           'type' => 'int',
-        ),
-      ),
-      'indexes' => array(
-        'target_id' => array(array('target_id', 10)),
-      ),
-    ));
+        ],
+      ],
+      'indexes' => [
+        'target_id' => [['target_id', 10]],
+      ],
+    ]);
     // Add a field with a multi-column index.
-    $this->setUpStorageDefinition('location', array(
-      'columns' => array(
-        'country' => array(
+    $this->setUpStorageDefinition('location', [
+      'columns' => [
+        'country' => [
           'type' => 'varchar',
-        ),
-        'state' => array(
+        ],
+        'state' => [
           'type' => 'varchar',
-        ),
-        'city' => array(
+        ],
+        'city' => [
           'type' => 'varchar',
-        )
-      ),
-      'indexes' => array(
-        'country_state_city' => array('country', 'state', array('city', 10)),
-      ),
-    ));
+        ]
+      ],
+      'indexes' => [
+        'country_state_city' => ['country', 'state', ['city', 10]],
+      ],
+    ]);
     // Add a field with a foreign key.
-    $this->setUpStorageDefinition('editor', array(
-      'columns' => array(
-        'target_id' => array(
+    $this->setUpStorageDefinition('editor', [
+      'columns' => [
+        'target_id' => [
           'type' => 'int',
-        ),
-      ),
-      'foreign keys' => array(
-        'user_id' => array(
+        ],
+      ],
+      'foreign keys' => [
+        'user_id' => [
           'table' => 'users',
-          'columns' => array('target_id' => 'uid'),
-        ),
-      ),
-    ));
+          'columns' => ['target_id' => 'uid'],
+        ],
+      ],
+    ]);
     // Add a multi-column field with a foreign key.
-    $this->setUpStorageDefinition('editor_revision', array(
-      'columns' => array(
-        'target_id' => array(
+    $this->setUpStorageDefinition('editor_revision', [
+      'columns' => [
+        'target_id' => [
           'type' => 'int',
-        ),
-        'target_revision_id' => array(
+        ],
+        'target_revision_id' => [
           'type' => 'int',
-        ),
-      ),
-      'foreign keys' => array(
-        'user_id' => array(
+        ],
+      ],
+      'foreign keys' => [
+        'user_id' => [
           'table' => 'users',
-          'columns' => array('target_id' => 'uid'),
-        ),
-      ),
-    ));
+          'columns' => ['target_id' => 'uid'],
+        ],
+      ],
+    ]);
     // Add a field with a really long index.
-    $this->setUpStorageDefinition('long_index_name', array(
-      'columns' => array(
-        'long_index_name' => array(
+    $this->setUpStorageDefinition('long_index_name', [
+      'columns' => [
+        'long_index_name' => [
           'type' => 'int',
-        ),
-      ),
-      'indexes' => array(
-        'long_index_name_really_long_long_name' => array(array('long_index_name', 10)),
-      ),
-    ));
-
-    $expected = array(
-      'entity_test' => array(
+        ],
+      ],
+      'indexes' => [
+        'long_index_name_really_long_long_name' => [['long_index_name', 10]],
+      ],
+    ]);
+
+    $expected = [
+      'entity_test' => [
         'description' => 'The base table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'serial',
             'not null' => TRUE,
-          ),
-          'name' => array(
+          ],
+          'name' => [
             'type' => 'varchar',
             'length' => 255,
             'not null' => FALSE,
-          ),
-          'description__value' => array(
+          ],
+          'description__value' => [
             'type' => 'text',
             'not null' => FALSE,
-          ),
-          'description__format' => array(
+          ],
+          'description__format' => [
             'type' => 'varchar',
             'not null' => FALSE,
-          ),
-          'uuid' => array(
+          ],
+          'uuid' => [
             'type' => 'varchar',
             'length' => 128,
             'not null' => FALSE,
-          ),
-          'hash' => array(
+          ],
+          'hash' => [
             'type' => 'varchar',
             'length' => 20,
             'not null' => FALSE,
-          ),
-          'email__username' => array(
+          ],
+          'email__username' => [
             'type' => 'varchar',
             'not null' => FALSE,
-          ),
-          'email__hostname' => array(
+          ],
+          'email__hostname' => [
             'type' => 'varchar',
             'not null' => FALSE,
-          ),
-          'email__domain' => array(
+          ],
+          'email__domain' => [
             'type' => 'varchar',
             'not null' => FALSE,
-          ),
-          'owner' => array(
+          ],
+          'owner' => [
             'type' => 'int',
             'not null' => FALSE,
-          ),
-          'translator' => array(
+          ],
+          'translator' => [
             'type' => 'int',
             'not null' => FALSE,
-          ),
-          'location__country' => array(
+          ],
+          'location__country' => [
             'type' => 'varchar',
             'not null' => FALSE,
-          ),
-          'location__state' => array(
+          ],
+          'location__state' => [
             'type' => 'varchar',
             'not null' => FALSE,
-          ),
-          'location__city' => array(
+          ],
+          'location__city' => [
             'type' => 'varchar',
             'not null' => FALSE,
-          ),
-          'editor' => array(
+          ],
+          'editor' => [
             'type' => 'int',
             'not null' => FALSE,
-          ),
-          'editor_revision__target_id' => array(
+          ],
+          'editor_revision__target_id' => [
             'type' => 'int',
             'not null' => FALSE,
-          ),
-          'editor_revision__target_revision_id' => array(
+          ],
+          'editor_revision__target_revision_id' => [
             'type' => 'int',
             'not null' => FALSE,
-          ),
-          'long_index_name' => array(
+          ],
+          'long_index_name' => [
             'type' => 'int',
             'not null' => FALSE,
-          ),
-        ),
-        'primary key' => array('id'),
-        'unique keys' => array(
-          'entity_test_field__uuid__value' => array('uuid'),
-          'entity_test_field__hash__value' => array(array('hash', 10)),
-          'entity_test_field__email__email' => array(
+          ],
+        ],
+        'primary key' => ['id'],
+        'unique keys' => [
+          'entity_test_field__uuid__value' => ['uuid'],
+          'entity_test_field__hash__value' => [['hash', 10]],
+          'entity_test_field__email__email' => [
             'email__username',
             'email__hostname',
-            array('email__domain', 3),
-          ),
-        ),
-        'indexes' => array(
-          'entity_test_field__owner__target_id' => array('owner'),
-          'entity_test_field__translator__target_id' => array(
-            array('translator', 10),
-          ),
-          'entity_test_field__location__country_state_city' => array(
+            ['email__domain', 3],
+          ],
+        ],
+        'indexes' => [
+          'entity_test_field__owner__target_id' => ['owner'],
+          'entity_test_field__translator__target_id' => [
+            ['translator', 10],
+          ],
+          'entity_test_field__location__country_state_city' => [
             'location__country',
             'location__state',
-            array('location__city', 10),
-          ),
-          'entity_test__b588603cb9' => array(
-            array('long_index_name', 10),
-          ),
-
-        ),
-        'foreign keys' => array(
-          'entity_test_field__editor__user_id' => array(
+            ['location__city', 10],
+          ],
+          'entity_test__b588603cb9' => [
+            ['long_index_name', 10],
+          ],
+
+        ],
+        'foreign keys' => [
+          'entity_test_field__editor__user_id' => [
             'table' => 'users',
-            'columns' => array('editor' => 'uid'),
-          ),
-          'entity_test_field__editor_revision__user_id' => array(
+            'columns' => ['editor' => 'uid'],
+          ],
+          'entity_test_field__editor_revision__user_id' => [
             'table' => 'users',
-            'columns' => array('editor_revision__target_id' => 'uid'),
-          ),
-        ),
-      ),
-    );
+            'columns' => ['editor_revision__target_id' => 'uid'],
+          ],
+        ],
+      ],
+    ];
 
     $this->setUpStorageSchema($expected);
 
     $table_mapping = new DefaultTableMapping($this->entityType, $this->storageDefinitions);
     $table_mapping->setFieldNames('entity_test', array_keys($this->storageDefinitions));
-    $table_mapping->setExtraColumns('entity_test', array('default_langcode'));
+    $table_mapping->setExtraColumns('entity_test', ['default_langcode']);
 
     $this->storage->expects($this->any())
       ->method('getTableMapping')
@@ -389,76 +389,76 @@ public function testGetSchemaBase() {
    * @covers ::processIdentifierSchema
    */
   public function testGetSchemaRevisionable() {
-    $this->entityType = new ContentEntityType(array(
+    $this->entityType = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array(
+      'entity_keys' => [
         'id' => 'id',
         'revision' => 'revision_id',
-      ),
-    ));
+      ],
+    ]);
 
     $this->storage->expects($this->exactly(2))
       ->method('getRevisionTable')
       ->will($this->returnValue('entity_test_revision'));
 
-    $this->setUpStorageDefinition('revision_id', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('revision_id', [
+      'columns' => [
+        'value' => [
           'type' => 'int',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
-    $expected = array(
-      'entity_test' => array(
+    $expected = [
+      'entity_test' => [
         'description' => 'The base table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'serial',
             'not null' => TRUE,
-          ),
-          'revision_id' => array(
+          ],
+          'revision_id' => [
             'type' => 'int',
             'not null' => FALSE,
-          )
-        ),
-        'primary key' => array('id'),
-        'unique keys' => array(
-          'entity_test__revision_id' => array('revision_id'),
-        ),
-        'indexes' => array(),
-        'foreign keys' => array(
-          'entity_test__revision' => array(
+          ]
+        ],
+        'primary key' => ['id'],
+        'unique keys' => [
+          'entity_test__revision_id' => ['revision_id'],
+        ],
+        'indexes' => [],
+        'foreign keys' => [
+          'entity_test__revision' => [
             'table' => 'entity_test_revision',
-            'columns' => array('revision_id' => 'revision_id'),
-          )
-        ),
-      ),
-      'entity_test_revision' => array(
+            'columns' => ['revision_id' => 'revision_id'],
+          ]
+        ],
+      ],
+      'entity_test_revision' => [
         'description' => 'The revision table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'int',
             'not null' => TRUE,
-          ),
-          'revision_id' => array(
+          ],
+          'revision_id' => [
             'type' => 'serial',
             'not null' => TRUE,
-          ),
-        ),
-        'primary key' => array('revision_id'),
-        'unique keys' => array(),
-        'indexes' => array(
-          'entity_test__id' => array('id'),
-        ),
-        'foreign keys' => array(
-          'entity_test__revisioned' => array(
+          ],
+        ],
+        'primary key' => ['revision_id'],
+        'unique keys' => [],
+        'indexes' => [
+          'entity_test__id' => ['id'],
+        ],
+        'foreign keys' => [
+          'entity_test__revisioned' => [
             'table' => 'entity_test',
-            'columns' => array('id' => 'id'),
-          ),
-        ),
-      ),
-    );
+            'columns' => ['id' => 'id'],
+          ],
+        ],
+      ],
+    ];
 
     $this->setUpStorageSchema($expected);
 
@@ -484,87 +484,87 @@ public function testGetSchemaRevisionable() {
    * @covers ::processDataTable
    */
   public function testGetSchemaTranslatable() {
-    $this->entityType = new ContentEntityType(array(
+    $this->entityType = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array(
+      'entity_keys' => [
         'id' => 'id',
         'langcode' => 'langcode',
-      ),
-    ));
+      ],
+    ]);
 
     $this->storage->expects($this->any())
       ->method('getDataTable')
       ->will($this->returnValue('entity_test_field_data'));
 
-    $this->setUpStorageDefinition('langcode', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('langcode', [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
-    $this->setUpStorageDefinition('default_langcode', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('default_langcode', [
+      'columns' => [
+        'value' => [
           'type' => 'int',
           'size' => 'tiny',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
-    $expected = array(
-      'entity_test' => array(
+    $expected = [
+      'entity_test' => [
         'description' => 'The base table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'serial',
             'not null' => TRUE,
-          ),
-          'langcode' => array(
+          ],
+          'langcode' => [
             'type' => 'varchar',
             'not null' => TRUE,
-          )
-        ),
-        'primary key' => array('id'),
-        'unique keys' => array(),
-        'indexes' => array(),
-        'foreign keys' => array(),
-      ),
-      'entity_test_field_data' => array(
+          ]
+        ],
+        'primary key' => ['id'],
+        'unique keys' => [],
+        'indexes' => [],
+        'foreign keys' => [],
+      ],
+      'entity_test_field_data' => [
         'description' => 'The data table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'int',
             'not null' => TRUE,
-          ),
-          'langcode' => array(
+          ],
+          'langcode' => [
             'type' => 'varchar',
             'not null' => TRUE,
-          ),
-          'default_langcode' => array(
+          ],
+          'default_langcode' => [
             'type' => 'int',
             'size' => 'tiny',
             'not null' => TRUE,
-          ),
-        ),
-        'primary key' => array('id', 'langcode'),
-        'unique keys' => array(),
-        'indexes' => array(
-          'entity_test__id__default_langcode__langcode' => array(
+          ],
+        ],
+        'primary key' => ['id', 'langcode'],
+        'unique keys' => [],
+        'indexes' => [
+          'entity_test__id__default_langcode__langcode' => [
             0 => 'id',
             1 => 'default_langcode',
             2 => 'langcode',
-          ),
-        ),
-        'foreign keys' => array(
-          'entity_test' => array(
+          ],
+        ],
+        'foreign keys' => [
+          'entity_test' => [
             'table' => 'entity_test',
-            'columns' => array('id' => 'id'),
-          ),
-        ),
-      ),
-    );
+            'columns' => ['id' => 'id'],
+          ],
+        ],
+      ],
+    ];
 
     $this->setUpStorageSchema($expected);
 
@@ -595,14 +595,14 @@ public function testGetSchemaTranslatable() {
    * @covers ::processRevisionDataTable
    */
   public function testGetSchemaRevisionableTranslatable() {
-    $this->entityType = new ContentEntityType(array(
+    $this->entityType = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array(
+      'entity_keys' => [
         'id' => 'id',
         'revision' => 'revision_id',
         'langcode' => 'langcode',
-      ),
-    ));
+      ],
+    ]);
 
     $this->storage->expects($this->exactly(3))
       ->method('getRevisionTable')
@@ -614,166 +614,166 @@ public function testGetSchemaRevisionableTranslatable() {
       ->method('getRevisionDataTable')
       ->will($this->returnValue('entity_test_revision_field_data'));
 
-    $this->setUpStorageDefinition('revision_id', array(
-      'columns' => array(
-        'value' => array(
+    $this->setUpStorageDefinition('revision_id', [
+      'columns' => [
+        'value' => [
           'type' => 'int',
-        ),
-      ),
-    ));
-    $this->setUpStorageDefinition('langcode', array(
-      'columns' => array(
-        'value' => array(
+        ],
+      ],
+    ]);
+    $this->setUpStorageDefinition('langcode', [
+      'columns' => [
+        'value' => [
           'type' => 'varchar',
-        ),
-      ),
-    ));
-    $this->setUpStorageDefinition('default_langcode', array(
-      'columns' => array(
-        'value' => array(
+        ],
+      ],
+    ]);
+    $this->setUpStorageDefinition('default_langcode', [
+      'columns' => [
+        'value' => [
           'type' => 'int',
           'size' => 'tiny',
-        ),
-      ),
-    ));
+        ],
+      ],
+    ]);
 
-    $expected = array(
-      'entity_test' => array(
+    $expected = [
+      'entity_test' => [
         'description' => 'The base table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'serial',
             'not null' => TRUE,
-          ),
-          'revision_id' => array(
+          ],
+          'revision_id' => [
             'type' => 'int',
             'not null' => FALSE,
-          ),
-          'langcode' => array(
+          ],
+          'langcode' => [
             'type' => 'varchar',
             'not null' => TRUE,
-          )
-        ),
-        'primary key' => array('id'),
-        'unique keys' => array(
-          'entity_test__revision_id' => array('revision_id'),
-        ),
-        'indexes' => array(),
-        'foreign keys' => array(
-          'entity_test__revision' => array(
+          ]
+        ],
+        'primary key' => ['id'],
+        'unique keys' => [
+          'entity_test__revision_id' => ['revision_id'],
+        ],
+        'indexes' => [],
+        'foreign keys' => [
+          'entity_test__revision' => [
             'table' => 'entity_test_revision',
-            'columns' => array('revision_id' => 'revision_id'),
-          ),
-        ),
-      ),
-      'entity_test_revision' => array(
+            'columns' => ['revision_id' => 'revision_id'],
+          ],
+        ],
+      ],
+      'entity_test_revision' => [
         'description' => 'The revision table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'int',
             'not null' => TRUE,
-          ),
-          'revision_id' => array(
+          ],
+          'revision_id' => [
             'type' => 'serial',
             'not null' => TRUE,
-          ),
-          'langcode' => array(
+          ],
+          'langcode' => [
             'type' => 'varchar',
             'not null' => TRUE,
-          ),
-        ),
-        'primary key' => array('revision_id'),
-        'unique keys' => array(),
-        'indexes' => array(
-          'entity_test__id' => array('id'),
-        ),
-        'foreign keys' => array(
-          'entity_test__revisioned' => array(
+          ],
+        ],
+        'primary key' => ['revision_id'],
+        'unique keys' => [],
+        'indexes' => [
+          'entity_test__id' => ['id'],
+        ],
+        'foreign keys' => [
+          'entity_test__revisioned' => [
             'table' => 'entity_test',
-            'columns' => array('id' => 'id'),
-          ),
-        ),
-      ),
-      'entity_test_field_data' => array(
+            'columns' => ['id' => 'id'],
+          ],
+        ],
+      ],
+      'entity_test_field_data' => [
         'description' => 'The data table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'int',
             'not null' => TRUE,
-          ),
-          'revision_id' => array(
+          ],
+          'revision_id' => [
             'type' => 'int',
             'not null' => TRUE,
-          ),
-          'langcode' => array(
+          ],
+          'langcode' => [
             'type' => 'varchar',
             'not null' => TRUE,
-          ),
-          'default_langcode' => array(
+          ],
+          'default_langcode' => [
             'type' => 'int',
             'size' => 'tiny',
             'not null' => TRUE,
-          ),
-        ),
-        'primary key' => array('id', 'langcode'),
-        'unique keys' => array(),
-        'indexes' => array(
-          'entity_test__revision_id' => array('revision_id'),
-          'entity_test__id__default_langcode__langcode' => array(
+          ],
+        ],
+        'primary key' => ['id', 'langcode'],
+        'unique keys' => [],
+        'indexes' => [
+          'entity_test__revision_id' => ['revision_id'],
+          'entity_test__id__default_langcode__langcode' => [
             0 => 'id',
             1 => 'default_langcode',
             2 => 'langcode',
-          ),
-        ),
-        'foreign keys' => array(
-          'entity_test' => array(
+          ],
+        ],
+        'foreign keys' => [
+          'entity_test' => [
             'table' => 'entity_test',
-            'columns' => array('id' => 'id'),
-          ),
-        ),
-      ),
-      'entity_test_revision_field_data' => array(
+            'columns' => ['id' => 'id'],
+          ],
+        ],
+      ],
+      'entity_test_revision_field_data' => [
         'description' => 'The revision data table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'int',
             'not null' => TRUE,
-          ),
-          'revision_id' => array(
+          ],
+          'revision_id' => [
             'type' => 'int',
             'not null' => TRUE,
-          ),
-          'langcode' => array(
+          ],
+          'langcode' => [
             'type' => 'varchar',
             'not null' => TRUE,
-          ),
-          'default_langcode' => array(
+          ],
+          'default_langcode' => [
             'type' => 'int',
             'size' => 'tiny',
             'not null' => TRUE,
-          ),
-        ),
-        'primary key' => array('revision_id', 'langcode'),
-        'unique keys' => array(),
-        'indexes' => array(
-          'entity_test__id__default_langcode__langcode' => array(
+          ],
+        ],
+        'primary key' => ['revision_id', 'langcode'],
+        'unique keys' => [],
+        'indexes' => [
+          'entity_test__id__default_langcode__langcode' => [
             0 => 'id',
             1 => 'default_langcode',
             2 => 'langcode',
-          ),
-        ),
-        'foreign keys' => array(
-          'entity_test' => array(
+          ],
+        ],
+        'foreign keys' => [
+          'entity_test' => [
             'table' => 'entity_test',
-            'columns' => array('id' => 'id'),
-          ),
-          'entity_test__revision' => array(
+            'columns' => ['id' => 'id'],
+          ],
+          'entity_test__revision' => [
             'table' => 'entity_test_revision',
-            'columns' => array('revision_id' => 'revision_id'),
-          ),
-        ),
-      ),
-    );
+            'columns' => ['revision_id' => 'revision_id'],
+          ],
+        ],
+      ],
+    ];
 
     $this->setUpStorageSchema($expected);
 
@@ -801,53 +801,53 @@ public function testGetSchemaRevisionableTranslatable() {
    */
   public function testDedicatedTableSchema() {
     $entity_type_id = 'entity_test';
-    $this->entityType = new ContentEntityType(array(
+    $this->entityType = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array('id' => 'id'),
-    ));
+      'entity_keys' => ['id' => 'id'],
+    ]);
 
     // Setup a field having a dedicated schema.
     $field_name = $this->getRandomGenerator()->name();
-    $this->setUpStorageDefinition($field_name, array(
-      'columns' => array(
-        'shape' => array(
+    $this->setUpStorageDefinition($field_name, [
+      'columns' => [
+        'shape' => [
           'type' => 'varchar',
           'length' => 32,
           'not null' => FALSE,
-        ),
-        'color' => array(
+        ],
+        'color' => [
           'type' => 'varchar',
           'length' => 32,
           'not null' => FALSE,
-        ),
-        'area' => array(
+        ],
+        'area' => [
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
-        ),
-        'depth' => array(
+        ],
+        'depth' => [
           'type' => 'int',
           'unsigned' => TRUE,
           'not null' => TRUE,
-        ),
-      ),
-      'foreign keys' => array(
-        'color' => array(
+        ],
+      ],
+      'foreign keys' => [
+        'color' => [
           'table' => 'color',
-          'columns' => array(
+          'columns' => [
             'color' => 'id'
-          ),
-        ),
-      ),
-      'unique keys' => array(
-        'area' => array('area'),
-        'shape' => array(array('shape', 10)),
-      ),
-      'indexes' => array(
-        'depth' => array('depth'),
-        'color' => array(array('color', 3)),
-      ),
-    ));
+          ],
+        ],
+      ],
+      'unique keys' => [
+        'area' => ['area'],
+        'shape' => [['shape', 10]],
+      ],
+      'indexes' => [
+        'depth' => ['depth'],
+        'color' => [['color', 3]],
+      ],
+    ]);
 
     $field_storage = $this->storageDefinitions[$field_name];
     $field_storage
@@ -868,97 +868,97 @@ public function testDedicatedTableSchema() {
       ->method('getType')
       ->will($this->returnValue('integer'));
 
-    $expected = array(
-      $entity_type_id . '__' . $field_name => array(
+    $expected = [
+      $entity_type_id . '__' . $field_name => [
         'description' => "Data storage for $entity_type_id field $field_name.",
-        'fields' => array(
-          'bundle' => array(
+        'fields' => [
+          'bundle' => [
             'type' => 'varchar_ascii',
             'length' => 128,
             'not null' => TRUE,
             'default' => '',
             'description' => 'The field instance bundle to which this row belongs, used when deleting a field instance',
-          ),
-          'deleted' => array(
+          ],
+          'deleted' => [
             'type' => 'int',
             'size' => 'tiny',
             'not null' => TRUE,
             'default' => 0,
             'description' => 'A boolean indicating whether this data item has been deleted',
-          ),
-          'entity_id' => array(
+          ],
+          'entity_id' => [
             'type' => 'int',
             'unsigned' => TRUE,
             'not null' => TRUE,
             'description' => 'The entity id this data is attached to',
-          ),
-          'revision_id' => array(
+          ],
+          'revision_id' => [
             'type' => 'int',
             'unsigned' => TRUE,
             'not null' => TRUE,
             'description' => 'The entity revision id this data is attached to, which for an unversioned entity type is the same as the entity id',
-          ),
-          'langcode' => array(
+          ],
+          'langcode' => [
             'type' => 'varchar_ascii',
             'length' => 32,
             'not null' => TRUE,
             'default' => '',
             'description' => 'The language code for this data item.',
-          ),
-          'delta' => array(
+          ],
+          'delta' => [
             'type' => 'int',
             'unsigned' => TRUE,
             'not null' => TRUE,
             'description' => 'The sequence number for this data item, used for multi-value fields',
-          ),
-          $field_name . '_shape' => array(
+          ],
+          $field_name . '_shape' => [
             'type' => 'varchar',
             'length' => 32,
             'not null' => FALSE,
-          ),
-          $field_name . '_color' => array(
+          ],
+          $field_name . '_color' => [
             'type' => 'varchar',
             'length' => 32,
             'not null' => FALSE,
-          ),
-          $field_name . '_area' => array(
+          ],
+          $field_name . '_area' => [
             'type' => 'int',
             'unsigned' => TRUE,
             'not null' => TRUE,
-          ),
-          $field_name . '_depth' => array(
+          ],
+          $field_name . '_depth' => [
             'type' => 'int',
             'unsigned' => TRUE,
             'not null' => TRUE,
-          ),
-        ),
-        'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
-        'indexes' => array(
-          'bundle' => array('bundle'),
-          'revision_id' => array('revision_id'),
-          $field_name . '_depth' => array($field_name . '_depth'),
-          $field_name . '_color' => array(array($field_name . '_color', 3)),
-        ),
-        'unique keys' => array(
-           $field_name . '_area' => array($field_name . '_area'),
-           $field_name . '_shape' => array(array($field_name . '_shape', 10)),
-        ),
-        'foreign keys' => array(
-          $field_name . '_color' => array(
+          ],
+        ],
+        'primary key' => ['entity_id', 'deleted', 'delta', 'langcode'],
+        'indexes' => [
+          'bundle' => ['bundle'],
+          'revision_id' => ['revision_id'],
+          $field_name . '_depth' => [$field_name . '_depth'],
+          $field_name . '_color' => [[$field_name . '_color', 3]],
+        ],
+        'unique keys' => [
+           $field_name . '_area' => [$field_name . '_area'],
+           $field_name . '_shape' => [[$field_name . '_shape', 10]],
+        ],
+        'foreign keys' => [
+          $field_name . '_color' => [
             'table' => 'color',
-            'columns' => array(
+            'columns' => [
               $field_name . '_color' => 'id',
-            ),
-          ),
-        ),
-      ),
-    );
+            ],
+          ],
+        ],
+      ],
+    ];
 
     $this->setUpStorageSchema($expected);
 
     $table_mapping = new DefaultTableMapping($this->entityType, $this->storageDefinitions);
     $table_mapping->setFieldNames($entity_type_id, array_keys($this->storageDefinitions));
-    $table_mapping->setExtraColumns($entity_type_id, array('default_langcode'));
+    $table_mapping->setExtraColumns($entity_type_id, ['default_langcode']);
 
     $this->storage->expects($this->any())
       ->method('getTableMapping')
@@ -978,37 +978,37 @@ public function testDedicatedTableSchema() {
    */
   public function testDedicatedTableSchemaForEntityWithStringIdentifier() {
     $entity_type_id = 'entity_test';
-    $this->entityType = new ContentEntityType(array(
+    $this->entityType = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array('id' => 'id'),
-    ));
+      'entity_keys' => ['id' => 'id'],
+    ]);
 
     // Setup a field having a dedicated schema.
     $field_name = $this->getRandomGenerator()->name();
-    $this->setUpStorageDefinition($field_name, array(
-      'columns' => array(
-        'shape' => array(
+    $this->setUpStorageDefinition($field_name, [
+      'columns' => [
+        'shape' => [
           'type' => 'varchar',
           'length' => 32,
           'not null' => FALSE,
-        ),
-        'color' => array(
+        ],
+        'color' => [
           'type' => 'varchar',
           'length' => 32,
           'not null' => FALSE,
-        ),
-      ),
-      'foreign keys' => array(
-        'color' => array(
+        ],
+      ],
+      'foreign keys' => [
+        'color' => [
           'table' => 'color',
-          'columns' => array(
+          'columns' => [
             'color' => 'id'
-          ),
-        ),
-      ),
-      'unique keys' => array(),
-      'indexes' => array(),
-    ));
+          ],
+        ],
+      ],
+      'unique keys' => [],
+      'indexes' => [],
+    ]);
 
     $field_storage = $this->storageDefinitions[$field_name];
     $field_storage
@@ -1029,81 +1029,81 @@ public function testDedicatedTableSchemaForEntityWithStringIdentifier() {
       ->method('getType')
       ->will($this->returnValue('string'));
 
-    $expected = array(
-      $entity_type_id . '__' . $field_name => array(
+    $expected = [
+      $entity_type_id . '__' . $field_name => [
         'description' => "Data storage for $entity_type_id field $field_name.",
-        'fields' => array(
-          'bundle' => array(
+        'fields' => [
+          'bundle' => [
             'type' => 'varchar_ascii',
             'length' => 128,
             'not null' => TRUE,
             'default' => '',
             'description' => 'The field instance bundle to which this row belongs, used when deleting a field instance',
-          ),
-          'deleted' => array(
+          ],
+          'deleted' => [
             'type' => 'int',
             'size' => 'tiny',
             'not null' => TRUE,
             'default' => 0,
             'description' => 'A boolean indicating whether this data item has been deleted',
-          ),
-          'entity_id' => array(
+          ],
+          'entity_id' => [
             'type' => 'varchar_ascii',
             'length' => 128,
             'not null' => TRUE,
             'description' => 'The entity id this data is attached to',
-          ),
-          'revision_id' => array(
+          ],
+          'revision_id' => [
             'type' => 'varchar_ascii',
             'length' => 128,
             'not null' => TRUE,
             'description' => 'The entity revision id this data is attached to, which for an unversioned entity type is the same as the entity id',
-          ),
-          'langcode' => array(
+          ],
+          'langcode' => [
             'type' => 'varchar_ascii',
             'length' => 32,
             'not null' => TRUE,
             'default' => '',
             'description' => 'The language code for this data item.',
-          ),
-          'delta' => array(
+          ],
+          'delta' => [
             'type' => 'int',
             'unsigned' => TRUE,
             'not null' => TRUE,
             'description' => 'The sequence number for this data item, used for multi-value fields',
-          ),
-          $field_name . '_shape' => array(
+          ],
+          $field_name . '_shape' => [
             'type' => 'varchar',
             'length' => 32,
             'not null' => FALSE,
-          ),
-          $field_name . '_color' => array(
+          ],
+          $field_name . '_color' => [
             'type' => 'varchar',
             'length' => 32,
             'not null' => FALSE,
-          ),
-        ),
-        'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
-        'indexes' => array(
-          'bundle' => array('bundle'),
-          'revision_id' => array('revision_id'),
-        ),
-        'foreign keys' => array(
-          $field_name . '_color' => array(
+          ],
+        ],
+        'primary key' => ['entity_id', 'deleted', 'delta', 'langcode'],
+        'indexes' => [
+          'bundle' => ['bundle'],
+          'revision_id' => ['revision_id'],
+        ],
+        'foreign keys' => [
+          $field_name . '_color' => [
             'table' => 'color',
-            'columns' => array(
+            'columns' => [
               $field_name . '_color' => 'id',
-            ),
-          ),
-        ),
-      ),
-    );
+            ],
+          ],
+        ],
+      ],
+    ];
 
     $this->setUpStorageSchema($expected);
 
     $table_mapping = new DefaultTableMapping($this->entityType, $this->storageDefinitions);
     $table_mapping->setFieldNames($entity_type_id, array_keys($this->storageDefinitions));
-    $table_mapping->setExtraColumns($entity_type_id, array('default_langcode'));
+    $table_mapping->setExtraColumns($entity_type_id, ['default_langcode']);
 
     $this->storage->expects($this->any())
       ->method('getTableMapping')
@@ -1162,10 +1162,10 @@ public function providerTestRequiresEntityDataMigration() {
    * @dataProvider providerTestRequiresEntityDataMigration
    */
   public function testRequiresEntityDataMigration($updated_entity_type_definition, $original_entity_type_definition, $original_storage_has_data, $shared_table_structure_changed, $migration_required) {
-    $this->entityType = new ContentEntityType(array(
+    $this->entityType = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array('id' => 'id'),
-    ));
+      'entity_keys' => ['id' => 'id'],
+    ]);
 
     $original_storage = $this->getMockBuilder('Drupal\Core\Entity\Sql\SqlContentEntityStorage')
       ->disableOriginalConstructor()
@@ -1188,8 +1188,8 @@ public function testRequiresEntityDataMigration($updated_entity_type_definition,
       ->willReturn($original_storage);
 
     $this->storageSchema = $this->getMockBuilder('Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema')
-      ->setConstructorArgs(array($this->entityManager, $this->entityType, $this->storage, $connection))
-      ->setMethods(array('installedStorageSchema', 'hasSharedTableStructureChange'))
+      ->setConstructorArgs([$this->entityManager, $this->entityType, $this->storage, $connection])
+      ->setMethods(['installedStorageSchema', 'hasSharedTableStructureChange'])
       ->getMock();
 
     $this->storageSchema->expects($this->any())
@@ -1273,15 +1273,15 @@ public function providerTestRequiresEntityStorageSchemaChanges() {
    */
   public function testRequiresEntityStorageSchemaChanges(ContentEntityTypeInterface $updated, ContentEntityTypeInterface $original, $requires_change, $change_schema, $change_shared_table) {
 
-    $this->entityType = new ContentEntityType(array(
+    $this->entityType = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array('id' => 'id'),
-    ));
+      'entity_keys' => ['id' => 'id'],
+    ]);
 
     $this->setUpStorageSchema();
     $table_mapping = new DefaultTableMapping($this->entityType, $this->storageDefinitions);
     $table_mapping->setFieldNames('entity_test', array_keys($this->storageDefinitions));
-    $table_mapping->setExtraColumns('entity_test', array('default_langcode'));
+    $table_mapping->setExtraColumns('entity_test', ['default_langcode']);
     $this->storage->expects($this->any())
       ->method('getTableMapping')
       ->will($this->returnValue($table_mapping));
@@ -1290,7 +1290,7 @@ public function testRequiresEntityStorageSchemaChanges(ContentEntityTypeInterfac
     if ($change_schema) {
       $this->storageSchema->expects($this->once())
         ->method('loadEntitySchemaData')
-        ->willReturn(array());
+        ->willReturn([]);
     }
     else {
       $expected = [
@@ -1321,7 +1321,7 @@ public function testRequiresEntityStorageSchemaChanges(ContentEntityTypeInterfac
    *   (optional) An associative array describing the expected entity schema to
    *   be created. Defaults to expecting nothing.
    */
-  protected function setUpStorageSchema(array $expected = array()) {
+  protected function setUpStorageSchema(array $expected = []) {
     $this->entityManager->expects($this->any())
       ->method('getDefinition')
       ->with($this->entityType->id())
@@ -1365,8 +1365,8 @@ protected function setUpStorageSchema(array $expected = array()) {
 
     $key_value = $this->getMock('Drupal\Core\KeyValueStore\KeyValueStoreInterface');
     $this->storageSchema = $this->getMockBuilder('Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema')
-      ->setConstructorArgs(array($this->entityManager, $this->entityType, $this->storage, $connection))
-      ->setMethods(array('installedStorageSchema', 'loadEntitySchemaData', 'hasSharedTableNameChanges', 'isTableEmpty'))
+      ->setConstructorArgs([$this->entityManager, $this->entityType, $this->storage, $connection])
+      ->setMethods(['installedStorageSchema', 'loadEntitySchemaData', 'hasSharedTableNameChanges', 'isTableEmpty'])
       ->getMock();
     $this->storageSchema
       ->expects($this->any())
@@ -1405,7 +1405,7 @@ public function setUpStorageDefinition($field_name, array $schema) {
       ->will($this->returnValue($schema['columns']));
     // Add property definitions.
     if (!empty($schema['columns'])) {
-      $property_definitions = array();
+      $property_definitions = [];
       foreach ($schema['columns'] as $column => $info) {
         $property_definitions[$column] = $this->getMock('Drupal\Core\TypedData\DataDefinitionInterface');
         $property_definitions[$column]->expects($this->any())
@@ -1422,49 +1422,49 @@ public function setUpStorageDefinition($field_name, array $schema) {
    * ::onEntityTypeUpdate
    */
   public function testonEntityTypeUpdateWithNewIndex() {
-    $this->entityType = $original_entity_type = new ContentEntityType(array(
+    $this->entityType = $original_entity_type = new ContentEntityType([
       'id' => 'entity_test',
-      'entity_keys' => array('id' => 'id'),
-    ));
+      'entity_keys' => ['id' => 'id'],
+    ]);
 
     // Add a field with a really long index.
-    $this->setUpStorageDefinition('long_index_name', array(
-      'columns' => array(
-        'long_index_name' => array(
+    $this->setUpStorageDefinition('long_index_name', [
+      'columns' => [
+        'long_index_name' => [
           'type' => 'int',
-        ),
-      ),
-      'indexes' => array(
-        'long_index_name_really_long_long_name' => array(array('long_index_name', 10)),
-      ),
-    ));
-
-    $expected = array(
-      'entity_test' => array(
+        ],
+      ],
+      'indexes' => [
+        'long_index_name_really_long_long_name' => [['long_index_name', 10]],
+      ],
+    ]);
+
+    $expected = [
+      'entity_test' => [
         'description' => 'The base table for entity_test entities.',
-        'fields' => array(
-          'id' => array(
+        'fields' => [
+          'id' => [
             'type' => 'serial',
             'not null' => TRUE,
-          ),
-          'long_index_name' => array(
+          ],
+          'long_index_name' => [
             'type' => 'int',
             'not null' => FALSE,
-          ),
-        ),
-        'indexes' => array(
-          'entity_test__b588603cb9' => array(
-            array('long_index_name', 10),
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+        'indexes' => [
+          'entity_test__b588603cb9' => [
+            ['long_index_name', 10],
+          ],
+        ],
+      ],
+    ];
 
     $this->setUpStorageSchema($expected);
 
     $table_mapping = new DefaultTableMapping($this->entityType, $this->storageDefinitions);
     $table_mapping->setFieldNames('entity_test', array_keys($this->storageDefinitions));
-    $table_mapping->setExtraColumns('entity_test', array('default_langcode'));
+    $table_mapping->setExtraColumns('entity_test', ['default_langcode']);
 
     $this->storage->expects($this->any())
       ->method('getTableMapping')
diff --git a/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageTest.php b/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageTest.php
index f552bfeca80d64dd51a0325232e44dc0735aba22..b3e339b897dac9a8844dde81c2b6771910fde94e 100644
--- a/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageTest.php
@@ -41,7 +41,7 @@ class SqlContentEntityStorageTest extends UnitTestCase {
    *
    * @var \Drupal\Core\Field\BaseFieldDefinition[]|\PHPUnit_Framework_MockObject_MockObject[]
    */
-  protected $fieldDefinitions = array();
+  protected $fieldDefinitions = [];
 
   /**
    * The mocked entity manager used in this test.
@@ -110,7 +110,7 @@ protected function setUp() {
     $this->languageManager = $this->getMock('Drupal\Core\Language\LanguageManagerInterface');
     $this->languageManager->expects($this->any())
       ->method('getDefaultLanguage')
-      ->will($this->returnValue(new Language(array('langcode' => 'en'))));
+      ->will($this->returnValue(new Language(['langcode' => 'en'])));
     $this->connection = $this->getMockBuilder('Drupal\Core\Database\Connection')
       ->disableOriginalConstructor()
       ->getMock();
@@ -150,12 +150,12 @@ public function testGetBaseTable($base_table, $expected) {
    *   value.
    */
   public function providerTestGetBaseTable() {
-    return array(
+    return [
       // Test that the entity type's base table is used, if provided.
-      array('entity_test', 'entity_test'),
+      ['entity_test', 'entity_test'],
       // Test that the storage falls back to the entity type ID.
-      array(NULL, 'entity_test'),
-    );
+      [NULL, 'entity_test'],
+    ];
   }
 
   /**
@@ -195,13 +195,13 @@ public function testGetRevisionTable($revision_table, $expected) {
    *   second value.
    */
   public function providerTestGetRevisionTable() {
-    return array(
+    return [
       // Test that the entity type's revision table is used, if provided.
-      array('entity_test_revision', 'entity_test_revision'),
+      ['entity_test_revision', 'entity_test_revision'],
       // Test that the storage falls back to the entity type ID with a
       // '_revision' suffix.
-      array(NULL, 'entity_test_revision'),
-    );
+      [NULL, 'entity_test_revision'],
+    ];
   }
 
   /**
@@ -267,13 +267,13 @@ public function testGetRevisionDataTable($revision_data_table, $expected) {
    *   the second value.
    */
   public function providerTestGetRevisionDataTable() {
-    return array(
+    return [
       // Test that the entity type's revision data table is used, if provided.
-      array('entity_test_field_revision', 'entity_test_field_revision'),
+      ['entity_test_field_revision', 'entity_test_field_revision'],
       // Test that the storage falls back to the entity type ID with a
       // '_field_revision' suffix.
-      array(NULL, 'entity_test_field_revision'),
-    );
+      [NULL, 'entity_test_field_revision'],
+    ];
   }
 
   /**
@@ -284,52 +284,52 @@ public function providerTestGetRevisionDataTable() {
    * @covers ::getTableMapping
    */
   public function testOnEntityTypeCreate() {
-    $columns = array(
-      'value' => array(
+    $columns = [
+      'value' => [
         'type' => 'int',
-      ),
-    );
+      ],
+    ];
 
-    $this->fieldDefinitions = $this->mockFieldDefinitions(array('id'));
+    $this->fieldDefinitions = $this->mockFieldDefinitions(['id']);
     $this->fieldDefinitions['id']->expects($this->any())
       ->method('getColumns')
       ->will($this->returnValue($columns));
     $this->fieldDefinitions['id']->expects($this->once())
       ->method('getSchema')
-      ->will($this->returnValue(array('columns' => $columns)));
+      ->will($this->returnValue(['columns' => $columns]));
 
     $this->entityType->expects($this->once())
       ->method('getKeys')
-      ->will($this->returnValue(array('id' => 'id')));
+      ->will($this->returnValue(['id' => 'id']));
     $this->entityType->expects($this->any())
       ->method('getKey')
-      ->will($this->returnValueMap(array(
+      ->will($this->returnValueMap([
         // EntityStorageBase::__construct()
-        array('id', 'id'),
+        ['id', 'id'],
         // ContentEntityStorageBase::__construct()
-        array('uuid', NULL),
-        array('bundle', NULL),
+        ['uuid', NULL],
+        ['bundle', NULL],
         // SqlContentEntityStorageSchema::initializeBaseTable()
-        array('id' => 'id'),
+        ['id' => 'id'],
         // SqlContentEntityStorageSchema::processBaseTable()
-        array('id' => 'id'),
-      )));
+        ['id' => 'id'],
+      ]));
 
     $this->setUpEntityStorage();
 
-    $expected = array(
+    $expected = [
       'description' => 'The base table for entity_test entities.',
-      'fields' => array(
-        'id' => array(
+      'fields' => [
+        'id' => [
           'type' => 'serial',
           'not null' => TRUE,
-        ),
-      ),
-      'primary key' => array('id'),
-      'unique keys' => array(),
-      'indexes' => array(),
-      'foreign keys' => array(),
-    );
+        ],
+      ],
+      'primary key' => ['id'],
+      'unique keys' => [],
+      'indexes' => [],
+      'foreign keys' => [],
+    ];
 
     $schema_handler = $this->getMockBuilder('Drupal\Core\Database\Schema')
       ->disableOriginalConstructor()
@@ -343,14 +343,14 @@ public function testOnEntityTypeCreate() {
       ->will($this->returnValue($schema_handler));
 
     $storage = $this->getMockBuilder('Drupal\Core\Entity\Sql\SqlContentEntityStorage')
-      ->setConstructorArgs(array($this->entityType, $this->connection, $this->entityManager, $this->cache, $this->languageManager))
-      ->setMethods(array('getStorageSchema'))
+      ->setConstructorArgs([$this->entityType, $this->connection, $this->entityManager, $this->cache, $this->languageManager])
+      ->setMethods(['getStorageSchema'])
       ->getMock();
 
     $key_value = $this->getMock('Drupal\Core\KeyValueStore\KeyValueStoreInterface');
     $schema_handler = $this->getMockBuilder('Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema')
-      ->setConstructorArgs(array($this->entityManager, $this->entityType, $storage, $this->connection))
-      ->setMethods(array('installedStorageSchema', 'createSharedTableSchema'))
+      ->setConstructorArgs([$this->entityManager, $this->entityType, $storage, $this->connection])
+      ->setMethods(['installedStorageSchema', 'createSharedTableSchema'])
       ->getMock();
     $schema_handler
       ->expects($this->any())
@@ -375,9 +375,9 @@ public function testGetTableMappingEmpty() {
     $this->setUpEntityStorage();
 
     $mapping = $this->entityStorage->getTableMapping();
-    $this->assertSame(array('entity_test'), $mapping->getTableNames());
-    $this->assertSame(array(), $mapping->getFieldNames('entity_test'));
-    $this->assertSame(array(), $mapping->getExtraColumns('entity_test'));
+    $this->assertSame(['entity_test'], $mapping->getTableNames());
+    $this->assertSame([], $mapping->getFieldNames('entity_test'));
+    $this->assertSame([], $mapping->getExtraColumns('entity_test'));
   }
 
   /**
@@ -394,22 +394,22 @@ public function testGetTableMappingEmpty() {
   public function testGetTableMappingSimple(array $entity_keys) {
     $this->entityType->expects($this->any())
       ->method('getKey')
-      ->will($this->returnValueMap(array(
-        array('id', $entity_keys['id']),
-        array('uuid', $entity_keys['uuid']),
-        array('bundle', $entity_keys['bundle']),
-      )));
+      ->will($this->returnValueMap([
+        ['id', $entity_keys['id']],
+        ['uuid', $entity_keys['uuid']],
+        ['bundle', $entity_keys['bundle']],
+      ]));
 
     $this->setUpEntityStorage();
 
     $mapping = $this->entityStorage->getTableMapping();
 
-    $this->assertEquals(array('entity_test'), $mapping->getTableNames());
+    $this->assertEquals(['entity_test'], $mapping->getTableNames());
 
     $expected = array_values(array_filter($entity_keys));
     $this->assertEquals($expected, $mapping->getFieldNames('entity_test'));
 
-    $this->assertEquals(array(), $mapping->getExtraColumns('entity_test'));
+    $this->assertEquals([], $mapping->getExtraColumns('entity_test'));
   }
 
   /**
@@ -424,15 +424,15 @@ public function testGetTableMappingSimple(array $entity_keys) {
    * @dataProvider providerTestGetTableMappingSimple()
    */
   public function testGetTableMappingSimpleWithFields(array $entity_keys) {
-    $base_field_names = array('title', 'description', 'owner');
+    $base_field_names = ['title', 'description', 'owner'];
     $field_names = array_merge(array_values(array_filter($entity_keys)), $base_field_names);
     $this->fieldDefinitions = $this->mockFieldDefinitions($field_names);
     $this->setUpEntityStorage();
 
     $mapping = $this->entityStorage->getTableMapping();
-    $this->assertEquals(array('entity_test'), $mapping->getTableNames());
+    $this->assertEquals(['entity_test'], $mapping->getTableNames());
     $this->assertEquals($field_names, $mapping->getFieldNames('entity_test'));
-    $this->assertEquals(array(), $mapping->getExtraColumns('entity_test'));
+    $this->assertEquals([], $mapping->getExtraColumns('entity_test'));
   }
 
   /**
@@ -443,28 +443,28 @@ public function testGetTableMappingSimpleWithFields(array $entity_keys) {
    *   entity keys to use for the mocked entity type.
    */
   public function providerTestGetTableMappingSimple() {
-    return array(
-      array(array(
+    return [
+      [[
         'id' => 'test_id',
         'bundle' => NULL,
         'uuid' => NULL,
-      )),
-      array(array(
+      ]],
+      [[
         'id' => 'test_id',
         'bundle' => 'test_bundle',
         'uuid' => NULL,
-      )),
-      array(array(
+      ]],
+      [[
         'id' => 'test_id',
         'bundle' => NULL,
         'uuid' => 'test_uuid',
-      )),
-      array(array(
+      ]],
+      [[
         'id' => 'test_id',
         'bundle' => 'test_bundle',
         'uuid' => 'test_uuid',
-      )),
-    );
+      ]],
+    ];
   }
 
   /**
@@ -492,14 +492,14 @@ public function testGetTableMappingSimpleWithDedicatedStorageFields() {
     $this->assertEquals(['entity_test', 'entity_test__multi_valued_base_field'], $mapping->getTableNames());
     $this->assertEquals($base_field_names, $mapping->getFieldNames('entity_test__multi_valued_base_field'));
 
-    $extra_columns = array(
+    $extra_columns = [
       'bundle',
       'deleted',
       'entity_id',
       'revision_id',
       'langcode',
       'delta',
-    );
+    ];
     $this->assertEquals($extra_columns, $mapping->getExtraColumns('entity_test__multi_valued_base_field'));
   }
 
@@ -516,24 +516,24 @@ public function testGetTableMappingSimpleWithDedicatedStorageFields() {
    */
   public function testGetTableMappingRevisionable(array $entity_keys) {
     // This allows to re-use the data provider.
-    $entity_keys = array(
+    $entity_keys = [
       'id' => $entity_keys['id'],
       'revision' => 'test_revision',
       'bundle' => $entity_keys['bundle'],
       'uuid' => $entity_keys['uuid'],
-    );
+    ];
 
     $this->entityType->expects($this->exactly(2))
       ->method('isRevisionable')
       ->will($this->returnValue(TRUE));
     $this->entityType->expects($this->any())
       ->method('getKey')
-      ->will($this->returnValueMap(array(
-        array('id', $entity_keys['id']),
-        array('uuid', $entity_keys['uuid']),
-        array('bundle', $entity_keys['bundle']),
-        array('revision', $entity_keys['revision']),
-      )));
+      ->will($this->returnValueMap([
+        ['id', $entity_keys['id']],
+        ['uuid', $entity_keys['uuid']],
+        ['bundle', $entity_keys['bundle']],
+        ['revision', $entity_keys['revision']],
+      ]));
     $this->entityType->expects($this->any())
       ->method('getRevisionMetadataKeys')
       ->will($this->returnValue([]));
@@ -542,16 +542,16 @@ public function testGetTableMappingRevisionable(array $entity_keys) {
 
     $mapping = $this->entityStorage->getTableMapping();
 
-    $expected = array('entity_test', 'entity_test_revision');
+    $expected = ['entity_test', 'entity_test_revision'];
     $this->assertEquals($expected, $mapping->getTableNames());
 
     $expected = array_values(array_filter($entity_keys));
     $this->assertEquals($expected, $mapping->getFieldNames('entity_test'));
-    $expected = array($entity_keys['id'], $entity_keys['revision']);
+    $expected = [$entity_keys['id'], $entity_keys['revision']];
     $this->assertEquals($expected, $mapping->getFieldNames('entity_test_revision'));
 
-    $this->assertEquals(array(), $mapping->getExtraColumns('entity_test'));
-    $this->assertEquals(array(), $mapping->getExtraColumns('entity_test_revision'));
+    $this->assertEquals([], $mapping->getExtraColumns('entity_test'));
+    $this->assertEquals([], $mapping->getExtraColumns('entity_test_revision'));
   }
 
   /**
@@ -567,46 +567,46 @@ public function testGetTableMappingRevisionable(array $entity_keys) {
    */
   public function testGetTableMappingRevisionableWithFields(array $entity_keys) {
     // This allows to re-use the data provider.
-    $entity_keys = array(
+    $entity_keys = [
       'id' => $entity_keys['id'],
       'revision' => 'test_revision',
       'bundle' => $entity_keys['bundle'],
       'uuid' => $entity_keys['uuid'],
-    );
+    ];
 
     // PHPUnit does not allow for multiple data providers.
-    $test_cases = array(
-      array(),
-      array('revision_created' => 'revision_timestamp'),
-      array('revision_user' => 'revision_uid'),
-      array('revision_log_message' => 'revision_log'),
-      array('revision_created' => 'revision_timestamp', 'revision_user' => 'revision_uid'),
-      array('revision_created' => 'revision_timestamp', 'revision_log_message' => 'revision_log'),
-      array('revision_user' => 'revision_uid', 'revision_log_message' => 'revision_log'),
-      array('revision_created' => 'revision_timestamp', 'revision_user' => 'revision_uid', 'revision_log_message' => 'revision_log'),
-    );
+    $test_cases = [
+      [],
+      ['revision_created' => 'revision_timestamp'],
+      ['revision_user' => 'revision_uid'],
+      ['revision_log_message' => 'revision_log'],
+      ['revision_created' => 'revision_timestamp', 'revision_user' => 'revision_uid'],
+      ['revision_created' => 'revision_timestamp', 'revision_log_message' => 'revision_log'],
+      ['revision_user' => 'revision_uid', 'revision_log_message' => 'revision_log'],
+      ['revision_created' => 'revision_timestamp', 'revision_user' => 'revision_uid', 'revision_log_message' => 'revision_log'],
+    ];
     foreach ($test_cases as $revision_metadata_field_names) {
       $this->setUp();
 
-      $base_field_names = array('title');
+      $base_field_names = ['title'];
       $field_names = array_merge(array_values(array_filter($entity_keys)), $base_field_names);
       $this->fieldDefinitions = $this->mockFieldDefinitions($field_names);
 
-      $revisionable_field_names = array('description', 'owner');
+      $revisionable_field_names = ['description', 'owner'];
       $field_names = array_merge($field_names, $revisionable_field_names);
-      $this->fieldDefinitions += $this->mockFieldDefinitions(array_merge($revisionable_field_names, array_values($revision_metadata_field_names)), array('isRevisionable' => TRUE));
+      $this->fieldDefinitions += $this->mockFieldDefinitions(array_merge($revisionable_field_names, array_values($revision_metadata_field_names)), ['isRevisionable' => TRUE]);
 
       $this->entityType->expects($this->exactly(2))
         ->method('isRevisionable')
         ->will($this->returnValue(TRUE));
       $this->entityType->expects($this->any())
         ->method('getKey')
-        ->will($this->returnValueMap(array(
-          array('id', $entity_keys['id']),
-          array('uuid', $entity_keys['uuid']),
-          array('bundle', $entity_keys['bundle']),
-          array('revision', $entity_keys['revision']),
-        )));
+        ->will($this->returnValueMap([
+          ['id', $entity_keys['id']],
+          ['uuid', $entity_keys['uuid']],
+          ['bundle', $entity_keys['bundle']],
+          ['revision', $entity_keys['revision']],
+        ]));
 
       $this->entityType->expects($this->any())
         ->method('getRevisionMetadataKeys')
@@ -616,19 +616,19 @@ public function testGetTableMappingRevisionableWithFields(array $entity_keys) {
 
       $mapping = $this->entityStorage->getTableMapping();
 
-      $expected = array('entity_test', 'entity_test_revision');
+      $expected = ['entity_test', 'entity_test_revision'];
       $this->assertEquals($expected, $mapping->getTableNames());
 
       $this->assertEquals($field_names, $mapping->getFieldNames('entity_test'));
       $expected = array_merge(
-        array($entity_keys['id'], $entity_keys['revision']),
+        [$entity_keys['id'], $entity_keys['revision']],
         $revisionable_field_names,
         array_values($revision_metadata_field_names)
       );
       $this->assertEquals($expected, $mapping->getFieldNames('entity_test_revision'));
 
-      $this->assertEquals(array(), $mapping->getExtraColumns('entity_test'));
-      $this->assertEquals(array(), $mapping->getExtraColumns('entity_test_revision'));
+      $this->assertEquals([], $mapping->getExtraColumns('entity_test'));
+      $this->assertEquals([], $mapping->getExtraColumns('entity_test_revision'));
     }
   }
 
@@ -655,33 +655,33 @@ public function testGetTableMappingTranslatable(array $entity_keys) {
       ->will($this->returnValue('entity_test_field_data'));
     $this->entityType->expects($this->any())
       ->method('getKey')
-      ->will($this->returnValueMap(array(
-        array('id', $entity_keys['id']),
-        array('uuid', $entity_keys['uuid']),
-        array('bundle', $entity_keys['bundle']),
-        array('langcode', $entity_keys['langcode']),
-      )));
+      ->will($this->returnValueMap([
+        ['id', $entity_keys['id']],
+        ['uuid', $entity_keys['uuid']],
+        ['bundle', $entity_keys['bundle']],
+        ['langcode', $entity_keys['langcode']],
+      ]));
 
     $this->setUpEntityStorage();
 
     $mapping = $this->entityStorage->getTableMapping();
 
-    $expected = array('entity_test', 'entity_test_field_data');
+    $expected = ['entity_test', 'entity_test_field_data'];
     $this->assertEquals($expected, $mapping->getTableNames());
 
     $expected = array_values(array_filter($entity_keys));
     $actual = $mapping->getFieldNames('entity_test');
     $this->assertEquals($expected, $actual);
     // The UUID is not stored on the data table.
-    $expected = array_values(array_filter(array(
+    $expected = array_values(array_filter([
       $entity_keys['id'],
       $entity_keys['bundle'],
       $entity_keys['langcode'],
-    )));
+    ]));
     $actual = $mapping->getFieldNames('entity_test_field_data');
     $this->assertEquals($expected, $actual);
 
-    $expected = array();
+    $expected = [];
     $actual = $mapping->getExtraColumns('entity_test');
     $this->assertEquals($expected, $actual);
     $actual = $mapping->getExtraColumns('entity_test_field_data');
@@ -703,7 +703,7 @@ public function testGetTableMappingTranslatableWithFields(array $entity_keys) {
     // This allows to re-use the data provider.
     $entity_keys['langcode'] = 'langcode';
 
-    $base_field_names = array('title', 'description', 'owner');
+    $base_field_names = ['title', 'description', 'owner'];
     $field_names = array_merge(array_values(array_filter($entity_keys)), $base_field_names);
     $this->fieldDefinitions = $this->mockFieldDefinitions($field_names);
 
@@ -715,33 +715,33 @@ public function testGetTableMappingTranslatableWithFields(array $entity_keys) {
       ->will($this->returnValue('entity_test_field_data'));
     $this->entityType->expects($this->any())
       ->method('getKey')
-      ->will($this->returnValueMap(array(
-        array('id', $entity_keys['id']),
-        array('uuid', $entity_keys['uuid']),
-        array('bundle', $entity_keys['bundle']),
-        array('langcode', $entity_keys['langcode']),
-      )));
+      ->will($this->returnValueMap([
+        ['id', $entity_keys['id']],
+        ['uuid', $entity_keys['uuid']],
+        ['bundle', $entity_keys['bundle']],
+        ['langcode', $entity_keys['langcode']],
+      ]));
 
     $this->setUpEntityStorage();
 
     $mapping = $this->entityStorage->getTableMapping();
 
-    $expected = array('entity_test', 'entity_test_field_data');
+    $expected = ['entity_test', 'entity_test_field_data'];
     $this->assertEquals($expected, $mapping->getTableNames());
 
     $expected = array_values(array_filter($entity_keys));
     $actual = $mapping->getFieldNames('entity_test');
     $this->assertEquals($expected, $actual);
     // The UUID is not stored on the data table.
-    $expected = array_merge(array_filter(array(
+    $expected = array_merge(array_filter([
       $entity_keys['id'],
       $entity_keys['bundle'],
       $entity_keys['langcode'],
-    )), $base_field_names);
+    ]), $base_field_names);
     $actual = $mapping->getFieldNames('entity_test_field_data');
     $this->assertEquals($expected, $actual);
 
-    $expected = array();
+    $expected = [];
     $actual = $mapping->getExtraColumns('entity_test');
     $this->assertEquals($expected, $actual);
     $actual = $mapping->getExtraColumns('entity_test_field_data');
@@ -761,18 +761,18 @@ public function testGetTableMappingTranslatableWithFields(array $entity_keys) {
    */
   public function testGetTableMappingRevisionableTranslatable(array $entity_keys) {
     // This allows to re-use the data provider.
-    $entity_keys = array(
+    $entity_keys = [
       'id' => $entity_keys['id'],
       'revision' => 'test_revision',
       'bundle' => $entity_keys['bundle'],
       'uuid' => $entity_keys['uuid'],
       'langcode' => 'langcode',
-    );
-    $revision_metadata_keys = array(
+    ];
+    $revision_metadata_keys = [
       'revision_created' => 'revision_timestamp',
       'revision_user' => 'revision_uid',
       'revision_log_message' => 'revision_log'
-    );
+    ];
 
     $this->entityType->expects($this->atLeastOnce())
       ->method('isRevisionable')
@@ -785,13 +785,13 @@ public function testGetTableMappingRevisionableTranslatable(array $entity_keys)
       ->will($this->returnValue('entity_test_field_data'));
     $this->entityType->expects($this->any())
       ->method('getKey')
-      ->will($this->returnValueMap(array(
-        array('id', $entity_keys['id']),
-        array('uuid', $entity_keys['uuid']),
-        array('bundle', $entity_keys['bundle']),
-        array('revision', $entity_keys['revision']),
-        array('langcode', $entity_keys['langcode']),
-      )));
+      ->will($this->returnValueMap([
+        ['id', $entity_keys['id']],
+        ['uuid', $entity_keys['uuid']],
+        ['bundle', $entity_keys['bundle']],
+        ['revision', $entity_keys['revision']],
+        ['langcode', $entity_keys['langcode']],
+      ]));
     $this->entityType->expects($this->any())
       ->method('getRevisionMetadataKeys')
       ->will($this->returnValue($revision_metadata_keys));
@@ -800,53 +800,53 @@ public function testGetTableMappingRevisionableTranslatable(array $entity_keys)
 
     $mapping = $this->entityStorage->getTableMapping();
 
-    $expected = array(
+    $expected = [
       'entity_test',
       'entity_test_field_data',
       'entity_test_revision',
       'entity_test_field_revision',
-    );
+    ];
     $this->assertEquals($expected, $mapping->getTableNames());
 
     // The default language code is stored on the base table.
-    $expected = array_values(array_filter(array(
+    $expected = array_values(array_filter([
       $entity_keys['id'],
       $entity_keys['revision'],
       $entity_keys['bundle'],
       $entity_keys['uuid'],
       $entity_keys['langcode'],
-    )));
+    ]));
     $actual = $mapping->getFieldNames('entity_test');
     $this->assertEquals($expected, $actual);
     // The revision table on the other hand does not store the bundle and the
     // UUID.
-    $expected = array_values(array_filter(array(
+    $expected = array_values(array_filter([
       $entity_keys['id'],
       $entity_keys['revision'],
       $entity_keys['langcode'],
-    )));
+    ]));
     $expected = array_merge($expected, array_values($revision_metadata_keys));
     $actual = $mapping->getFieldNames('entity_test_revision');
     $this->assertEquals($expected, $actual);
     // The UUID is not stored on the data table.
-    $expected = array_values(array_filter(array(
+    $expected = array_values(array_filter([
       $entity_keys['id'],
       $entity_keys['revision'],
       $entity_keys['bundle'],
       $entity_keys['langcode'],
-    )));
+    ]));
     $actual = $mapping->getFieldNames('entity_test_field_data');
     $this->assertEquals($expected, $actual);
     // The data revision also does not store the bundle.
-    $expected = array_values(array_filter(array(
+    $expected = array_values(array_filter([
       $entity_keys['id'],
       $entity_keys['revision'],
       $entity_keys['langcode'],
-    )));
+    ]));
     $actual = $mapping->getFieldNames('entity_test_field_revision');
     $this->assertEquals($expected, $actual);
 
-    $expected = array();
+    $expected = [];
     $actual = $mapping->getExtraColumns('entity_test');
     $this->assertEquals($expected, $actual);
     $actual = $mapping->getExtraColumns('entity_test_revision');
@@ -870,34 +870,34 @@ public function testGetTableMappingRevisionableTranslatable(array $entity_keys)
    */
   public function testGetTableMappingRevisionableTranslatableWithFields(array $entity_keys) {
     // This allows to re-use the data provider.
-    $entity_keys = array(
+    $entity_keys = [
       'id' => $entity_keys['id'],
       'revision' => 'test_revision',
       'bundle' => $entity_keys['bundle'],
       'uuid' => $entity_keys['uuid'],
       'langcode' => 'langcode',
-    );
+    ];
 
     // PHPUnit does not allow for multiple data providers.
-    $test_cases = array(
-      array(),
-      array('revision_created' => 'revision_timestamp'),
-      array('revision_user' => 'revision_uid'),
-      array('revision_log_message' => 'revision_log'),
-      array('revision_created' => 'revision_timestamp', 'revision_user' => 'revision_uid'),
-      array('revision_created' => 'revision_timestamp', 'revision_log_message' => 'revision_log'),
-      array('revision_user' => 'revision_uid', 'revision_log_message' => 'revision_log'),
-      array('revision_created' => 'revision_timestamp', 'revision_user' => 'revision_uid', 'revision_log_message' => 'revision_log'),
-    );
+    $test_cases = [
+      [],
+      ['revision_created' => 'revision_timestamp'],
+      ['revision_user' => 'revision_uid'],
+      ['revision_log_message' => 'revision_log'],
+      ['revision_created' => 'revision_timestamp', 'revision_user' => 'revision_uid'],
+      ['revision_created' => 'revision_timestamp', 'revision_log_message' => 'revision_log'],
+      ['revision_user' => 'revision_uid', 'revision_log_message' => 'revision_log'],
+      ['revision_created' => 'revision_timestamp', 'revision_user' => 'revision_uid', 'revision_log_message' => 'revision_log'],
+    ];
     foreach ($test_cases as $revision_metadata_field_names) {
       $this->setUp();
 
-      $base_field_names = array('title');
+      $base_field_names = ['title'];
       $field_names = array_merge(array_values(array_filter($entity_keys)), $base_field_names);
       $this->fieldDefinitions = $this->mockFieldDefinitions($field_names);
 
-      $revisionable_field_names = array('description', 'owner');
-      $this->fieldDefinitions += $this->mockFieldDefinitions(array_merge($revisionable_field_names, array_values($revision_metadata_field_names)), array('isRevisionable' => TRUE));
+      $revisionable_field_names = ['description', 'owner'];
+      $this->fieldDefinitions += $this->mockFieldDefinitions(array_merge($revisionable_field_names, array_values($revision_metadata_field_names)), ['isRevisionable' => TRUE]);
 
       $this->entityType->expects($this->atLeastOnce())
         ->method('isRevisionable')
@@ -910,13 +910,13 @@ public function testGetTableMappingRevisionableTranslatableWithFields(array $ent
         ->will($this->returnValue('entity_test_field_data'));
       $this->entityType->expects($this->any())
         ->method('getKey')
-        ->will($this->returnValueMap(array(
-          array('id', $entity_keys['id']),
-          array('uuid', $entity_keys['uuid']),
-          array('bundle', $entity_keys['bundle']),
-          array('revision', $entity_keys['revision']),
-          array('langcode', $entity_keys['langcode']),
-        )));
+        ->will($this->returnValueMap([
+          ['id', $entity_keys['id']],
+          ['uuid', $entity_keys['uuid']],
+          ['bundle', $entity_keys['bundle']],
+          ['revision', $entity_keys['revision']],
+          ['langcode', $entity_keys['langcode']],
+        ]));
       $this->entityType->expects($this->any())
         ->method('getRevisionMetadataKeys')
         ->will($this->returnValue($revision_metadata_field_names));
@@ -925,60 +925,60 @@ public function testGetTableMappingRevisionableTranslatableWithFields(array $ent
 
       $mapping = $this->entityStorage->getTableMapping();
 
-      $expected = array(
+      $expected = [
         'entity_test',
         'entity_test_field_data',
         'entity_test_revision',
         'entity_test_field_revision',
-      );
+      ];
       $this->assertEquals($expected, $mapping->getTableNames());
 
-      $expected = array(
+      $expected = [
         'entity_test',
         'entity_test_field_data',
         'entity_test_revision',
         'entity_test_field_revision',
-      );
+      ];
       $this->assertEquals($expected, $mapping->getTableNames());
 
       // The default language code is not stored on the base table.
-      $expected = array_values(array_filter(array(
+      $expected = array_values(array_filter([
         $entity_keys['id'],
         $entity_keys['revision'],
         $entity_keys['bundle'],
         $entity_keys['uuid'],
         $entity_keys['langcode'],
-      )));
+      ]));
       $actual = $mapping->getFieldNames('entity_test');
       $this->assertEquals($expected, $actual);
       // The revision table on the other hand does not store the bundle and the
       // UUID.
-      $expected = array_merge(array_filter(array(
+      $expected = array_merge(array_filter([
         $entity_keys['id'],
         $entity_keys['revision'],
         $entity_keys['langcode'],
-      )), array_values($revision_metadata_field_names));
+      ]), array_values($revision_metadata_field_names));
       $actual = $mapping->getFieldNames('entity_test_revision');
       $this->assertEquals($expected, $actual);
       // The UUID is not stored on the data table.
-      $expected = array_merge(array_filter(array(
+      $expected = array_merge(array_filter([
         $entity_keys['id'],
         $entity_keys['revision'],
         $entity_keys['bundle'],
         $entity_keys['langcode'],
-      )), $base_field_names, $revisionable_field_names);
+      ]), $base_field_names, $revisionable_field_names);
       $actual = $mapping->getFieldNames('entity_test_field_data');
       $this->assertEquals($expected, $actual);
       // The data revision also does not store the bundle.
-      $expected = array_merge(array_filter(array(
+      $expected = array_merge(array_filter([
         $entity_keys['id'],
         $entity_keys['revision'],
         $entity_keys['langcode'],
-      )), $revisionable_field_names);
+      ]), $revisionable_field_names);
       $actual = $mapping->getFieldNames('entity_test_field_revision');
       $this->assertEquals($expected, $actual);
 
-      $expected = array();
+      $expected = [];
       $actual = $mapping->getExtraColumns('entity_test');
       $this->assertEquals($expected, $actual);
       $actual = $mapping->getExtraColumns('entity_test_revision');
@@ -996,7 +996,7 @@ public function testGetTableMappingRevisionableTranslatableWithFields(array $ent
   public function testCreate() {
     $language_manager = $this->getMock('Drupal\Core\Language\LanguageManagerInterface');
 
-    $language = new Language(array('id' => 'en'));
+    $language = new Language(['id' => 'en']);
     $language_manager->expects($this->any())
       ->method('getCurrentLanguage')
       ->will($this->returnValue($language));
@@ -1007,7 +1007,7 @@ public function testCreate() {
 
     $entity = $this->getMockBuilder('Drupal\Core\Entity\ContentEntityBase')
       ->disableOriginalConstructor()
-      ->setMethods(array('id'))
+      ->setMethods(['id'])
       ->getMockForAbstractClass();
 
     $this->entityType->expects($this->atLeastOnce())
@@ -1018,13 +1018,13 @@ public function testCreate() {
       ->will($this->returnValue(get_class($entity)));
     $this->entityType->expects($this->atLeastOnce())
       ->method('getKeys')
-      ->will($this->returnValue(array('id' => 'id')));
+      ->will($this->returnValue(['id' => 'id']));
 
     // ContentEntityStorageBase iterates over the entity which calls this method
     // internally in ContentEntityBase::getProperties().
     $this->entityManager->expects($this->once())
       ->method('getFieldDefinitions')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->entityType->expects($this->atLeastOnce())
       ->method('isRevisionable')
@@ -1058,14 +1058,14 @@ public function testCreate() {
    * @return \Drupal\Tests\Core\Field\TestBaseFieldDefinitionInterface[]|\PHPUnit_Framework_MockObject_MockObject[]
    *   An array of mock base field definitions.
    */
-  protected function mockFieldDefinitions(array $field_names, $methods = array()) {
-    $field_definitions = array();
+  protected function mockFieldDefinitions(array $field_names, $methods = []) {
+    $field_definitions = [];
     $definition = $this->getMock('Drupal\Tests\Core\Field\TestBaseFieldDefinitionInterface');
 
     // Assign common method return values.
-    $methods += array(
+    $methods += [
       'isBaseField' => TRUE,
-    );
+    ];
     foreach ($methods as $method => $result) {
       $definition
         ->expects($this->any())
@@ -1136,15 +1136,15 @@ public function testLoadMultiplePersistentCached() {
 
     $this->cache->expects($this->once())
       ->method('getMultiple')
-      ->with(array($key))
-      ->will($this->returnValue(array($key => (object) array(
+      ->with([$key])
+      ->will($this->returnValue([$key => (object) [
           'data' => $entity,
-        ))));
+        ]]));
     $this->cache->expects($this->never())
       ->method('set');
 
     $this->setUpEntityStorage();
-    $entities = $this->entityStorage->loadMultiple(array($id));
+    $entities = $this->entityStorage->loadMultiple([$id]);
     $this->assertEquals($entity, $entities[$id]);
   }
 
@@ -1182,17 +1182,17 @@ public function testLoadMultipleNoPersistentCache() {
       ->method('set');
 
     $entity_storage = $this->getMockBuilder('Drupal\Core\Entity\Sql\SqlContentEntityStorage')
-      ->setConstructorArgs(array($this->entityType, $this->connection, $this->entityManager, $this->cache, $this->languageManager))
-      ->setMethods(array('getFromStorage', 'invokeStorageLoadHook'))
+      ->setConstructorArgs([$this->entityType, $this->connection, $this->entityManager, $this->cache, $this->languageManager])
+      ->setMethods(['getFromStorage', 'invokeStorageLoadHook'])
       ->getMock();
     $entity_storage->method('invokeStorageLoadHook')
       ->willReturn(NULL);
     $entity_storage->expects($this->once())
       ->method('getFromStorage')
-      ->with(array($id))
-      ->will($this->returnValue(array($id => $entity)));
+      ->with([$id])
+      ->will($this->returnValue([$id => $entity]));
 
-    $entities = $entity_storage->loadMultiple(array($id));
+    $entities = $entity_storage->loadMultiple([$id]);
     $this->assertEquals($entity, $entities[$id]);
   }
 
@@ -1227,24 +1227,24 @@ public function testLoadMultiplePersistentCacheMiss() {
     $key = 'values:' . $this->entityTypeId . ':1';
     $this->cache->expects($this->once())
       ->method('getMultiple')
-      ->with(array($key))
-      ->will($this->returnValue(array()));
+      ->with([$key])
+      ->will($this->returnValue([]));
     $this->cache->expects($this->once())
       ->method('set')
-      ->with($key, $entity, CacheBackendInterface::CACHE_PERMANENT, array($this->entityTypeId . '_values', 'entity_field_info'));
+      ->with($key, $entity, CacheBackendInterface::CACHE_PERMANENT, [$this->entityTypeId . '_values', 'entity_field_info']);
 
     $entity_storage = $this->getMockBuilder('Drupal\Core\Entity\Sql\SqlContentEntityStorage')
-      ->setConstructorArgs(array($this->entityType, $this->connection, $this->entityManager, $this->cache, $this->languageManager))
-      ->setMethods(array('getFromStorage', 'invokeStorageLoadHook'))
+      ->setConstructorArgs([$this->entityType, $this->connection, $this->entityManager, $this->cache, $this->languageManager])
+      ->setMethods(['getFromStorage', 'invokeStorageLoadHook'])
       ->getMock();
     $entity_storage->method('invokeStorageLoadHook')
       ->willReturn(NULL);
     $entity_storage->expects($this->once())
       ->method('getFromStorage')
-      ->with(array($id))
-      ->will($this->returnValue(array($id => $entity)));
+      ->with([$id])
+      ->will($this->returnValue([$id => $entity]));
 
-    $entities = $entity_storage->loadMultiple(array($id));
+    $entities = $entity_storage->loadMultiple([$id]);
     $this->assertEquals($entity, $entities[$id]);
   }
 
@@ -1263,7 +1263,7 @@ public function testHasData() {
       ->willReturn($query);
     $query->expects(($this->once()))
       ->method('execute')
-      ->willReturn(array(5));
+      ->willReturn([5]);
 
     $factory = $this->getMock(QueryFactoryInterface::class);
     $factory->expects($this->once())
@@ -1300,7 +1300,7 @@ public function testHasData() {
    * Tests entity ID sanitization.
    */
   public function testCleanIds() {
-    $valid_ids = array(
+    $valid_ids = [
       -1,
       0,
       1,
@@ -1328,9 +1328,9 @@ public function testCleanIds() {
       0.00,
       1.00,
       10.00,
-    );
+    ];
 
-    $this->fieldDefinitions = $this->mockFieldDefinitions(array('id'));
+    $this->fieldDefinitions = $this->mockFieldDefinitions(['id']);
     $this->fieldDefinitions['id']->expects($this->any())
       ->method('getType')
       ->will($this->returnValue('integer'));
@@ -1340,14 +1340,14 @@ public function testCleanIds() {
     $this->entityType->expects($this->any())
       ->method('getKey')
       ->will($this->returnValueMap(
-        array(array('id', 'id'))
+        [['id', 'id']]
       ));
 
     $method = new \ReflectionMethod($this->entityStorage, 'cleanIds');
     $method->setAccessible(TRUE);
     $this->assertEquals($valid_ids, $method->invoke($this->entityStorage, $valid_ids));
 
-    $invalid_ids = array(
+    $invalid_ids = [
       '--1',
       '-0x1A',
       '0x1AFC',
@@ -1360,8 +1360,8 @@ public function testCleanIds() {
       '32acb',
       123.123,
       123.678,
-    );
-    $this->assertEquals(array(), $method->invoke($this->entityStorage, $invalid_ids));
+    ];
+    $this->assertEquals([], $method->invoke($this->entityStorage, $invalid_ids));
 
   }
 
@@ -1371,10 +1371,10 @@ public function testCleanIds() {
   protected function setUpModuleHandlerNoImplementations() {
     $this->moduleHandler->expects($this->any())
       ->method('getImplementations')
-      ->will($this->returnValueMap(array(
-        array('entity_load', array()),
-        array($this->entityTypeId . '_load', array())
-      )));
+      ->will($this->returnValueMap([
+        ['entity_load', []],
+        [$this->entityTypeId . '_load', []]
+      ]));
 
     $this->container->set('module_handler', $this->moduleHandler);
   }
diff --git a/core/tests/Drupal/Tests/Core/Entity/TypedData/EntityAdapterUnitTest.php b/core/tests/Drupal/Tests/Core/Entity/TypedData/EntityAdapterUnitTest.php
index 646f17a3a154ebe6598ee21dc50ed20a22f2cddb..e290f5ab56404685e3f38a7ec607578612aee61f 100644
--- a/core/tests/Drupal/Tests/Core/Entity/TypedData/EntityAdapterUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/TypedData/EntityAdapterUnitTest.php
@@ -113,21 +113,21 @@ class EntityAdapterUnitTest extends UnitTestCase {
    */
   protected function setUp() {
     $this->id = 1;
-    $values = array(
+    $values = [
       'id' => $this->id,
       'uuid' => '3bb9ee60-bea5-4622-b89b-a63319d10b3a',
-      'defaultLangcode' => array(LanguageInterface::LANGCODE_DEFAULT => 'en'),
-    );
+      'defaultLangcode' => [LanguageInterface::LANGCODE_DEFAULT => 'en'],
+    ];
     $this->entityTypeId = $this->randomMachineName();
     $this->bundle = $this->randomMachineName();
 
     $this->entityType = $this->getMock('\Drupal\Core\Entity\EntityTypeInterface');
     $this->entityType->expects($this->any())
       ->method('getKeys')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'id' => 'id',
         'uuid' => 'uuid',
-    )));
+    ]));
 
     $this->entityManager = $this->getMock('\Drupal\Core\Entity\EntityManagerInterface');
     $this->entityManager->expects($this->any())
@@ -156,11 +156,11 @@ protected function setUp() {
       ->method('getValidationConstraintManager')
       ->willReturn($validation_constraint_manager);
 
-    $not_specified = new Language(array('id' => LanguageInterface::LANGCODE_NOT_SPECIFIED, 'locked' => TRUE));
+    $not_specified = new Language(['id' => LanguageInterface::LANGCODE_NOT_SPECIFIED, 'locked' => TRUE]);
     $this->languageManager = $this->getMock('\Drupal\Core\Language\LanguageManagerInterface');
     $this->languageManager->expects($this->any())
       ->method('getLanguages')
-      ->will($this->returnValue(array(LanguageInterface::LANGCODE_NOT_SPECIFIED => $not_specified)));
+      ->will($this->returnValue([LanguageInterface::LANGCODE_NOT_SPECIFIED => $not_specified]));
 
     $this->languageManager->expects($this->any())
       ->method('getLanguage')
@@ -172,10 +172,10 @@ protected function setUp() {
       ->getMock();
     $this->fieldTypePluginManager->expects($this->any())
       ->method('getDefaultStorageSettings')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $this->fieldTypePluginManager->expects($this->any())
       ->method('getDefaultFieldSettings')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->fieldItemList = $this->getMock('\Drupal\Core\Field\FieldItemListInterface');
     $this->fieldTypePluginManager->expects($this->any())
@@ -190,16 +190,16 @@ protected function setUp() {
     $container->set('plugin.manager.field.field_type', $this->fieldTypePluginManager);
     \Drupal::setContainer($container);
 
-    $this->fieldDefinitions = array(
+    $this->fieldDefinitions = [
       'id' => BaseFieldDefinition::create('integer'),
       'revision_id' => BaseFieldDefinition::create('integer'),
-    );
+    ];
 
     $this->entityManager->expects($this->any())
       ->method('getFieldDefinitions')
       ->with($this->entityTypeId, $this->bundle)
       ->will($this->returnValue($this->fieldDefinitions));
-    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Entity\ContentEntityBase', array($values, $this->entityTypeId, $this->bundle));
+    $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Entity\ContentEntityBase', [$values, $this->entityTypeId, $this->bundle]);
 
     $this->entityAdapter = EntityAdapter::createFromEntity($this->entity);
   }
@@ -294,7 +294,7 @@ public function testGetWithoutData() {
    * @covers ::set
    */
   public function testSet() {
-    $id_items = [ array('value' => $this->id + 1) ];
+    $id_items = [ ['value' => $this->id + 1] ];
 
     $this->fieldItemList->expects($this->once())
       ->method('setValue')
@@ -309,7 +309,7 @@ public function testSet() {
    */
   public function testSetWithoutData() {
     $this->entityAdapter->setValue(NULL);
-    $id_items = [ array('value' => $this->id + 1) ];
+    $id_items = [ ['value' => $this->id + 1] ];
     $this->entityAdapter->set('id', $id_items);
   }
 
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php
index 0597e8c9ac7c30bd9829f8ff1d39750fc4bda66d..f60fe68671331751803117e179432dd67d828e25 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php
@@ -28,24 +28,24 @@ public function providerTestSetLinkActiveClass() {
   <track kind="captions" src="foo.en.vtt" srclang="en" label="English">
   <track kind="captions" src="foo.sv.vtt" srclang="sv" label="Svenska">
 </audio>';
-    $html = array(
+    $html = [
       // Simple HTML.
-      0 => array('prefix' => '<div><p>', 'suffix' => '</p></div>'),
+      0 => ['prefix' => '<div><p>', 'suffix' => '</p></div>'],
       // Tricky HTML5 example that's unsupported by PHP <=5.4's DOMDocument:
       // https://www.drupal.org/comment/7938201#comment-7938201.
-      1 => array('prefix' => '<div><p>', 'suffix' => '</p>' . $edge_case_html5 . '</div>'),
+      1 => ['prefix' => '<div><p>', 'suffix' => '</p>' . $edge_case_html5 . '</div>'],
       // Multi-byte content *before* the HTML that needs the "is-active" class.
-      2 => array('prefix' => '<div><p>αβγδεζηθικλμνξοσὠ</p><p>', 'suffix' => '</p></div>'),
-    );
-    $tags = array(
+      2 => ['prefix' => '<div><p>αβγδεζηθικλμνξοσὠ</p><p>', 'suffix' => '</p></div>'],
+    ];
+    $tags = [
       // Of course, it must work on anchors.
       'a',
       // Unfortunately, it must also work on list items.
       'li',
       // … and therefor, on *any* tag, really.
       'foo',
-    );
-    $contents = array(
+    ];
+    $contents = [
       // Regular content.
       'test',
       // Mix of UTF-8 and HTML entities, both must be retained.
@@ -55,191 +55,191 @@ public function providerTestSetLinkActiveClass() {
       // Text that closely approximates an important attribute, but should be
       // ignored.
       'data-drupal-link-system-path=&quot;&lt;front&gt;&quot;',
-    );
+    ];
 
     // Define all variations that *do* affect whether or not an "is-active"
     // class is set: all possible situations that can be encountered.
-    $situations = array();
+    $situations = [];
 
     // Situations with context: front page, English, no query.
-    $context = array(
+    $context = [
       'path' => 'myfrontpage',
       'front' => TRUE,
       'language' => 'en',
-      'query' => array(),
-    );
+      'query' => [],
+    ];
     // Nothing to do.
     $markup = '<foo>bar</foo>';
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => array());
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => []];
     // Matching path, plus all matching variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => 'myfrontpage',
-    );
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes + array('hreflang' => 'en'));
+    ];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes + ['hreflang' => 'en']];
     // Matching path, plus all non-matching variations.
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => '{"foo":"bar"}'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => TRUE));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => '{"foo":"bar"}'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => '{"foo":"bar"}']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => TRUE]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => '{"foo":"bar"}']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => TRUE]];
     // Special matching path, plus all variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => '<front>',
-    );
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes + array('hreflang' => 'en'));
+    ];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes + ['hreflang' => 'en']];
     // Special matching path, plus all non-matching variations.
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => '{"foo":"bar"}'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => TRUE));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => '{"foo":"bar"}'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => '{"foo":"bar"}']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => TRUE]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => '{"foo":"bar"}']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => TRUE]];
 
     // Situations with context: non-front page, Dutch, no query.
-    $context = array(
+    $context = [
       'path' => 'llama',
       'front' => FALSE,
       'language' => 'nl',
-      'query' => array(),
-    );
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => array());
+      'query' => [],
+    ];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => []];
     // Matching path, plus all matching variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => 'llama',
-    );
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes + array('hreflang' => 'nl'));
+    ];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes + ['hreflang' => 'nl']];
     // Matching path, plus all non-matching variations.
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => '{"foo":"bar"}'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => TRUE));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => '{"foo":"bar"}'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => '{"foo":"bar"}']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => TRUE]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => '{"foo":"bar"}']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => TRUE]];
     // Special non-matching path, plus all variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => '<front>',
-    );
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => '{"foo":"bar"}'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => TRUE));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => '{"foo":"bar"}'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => TRUE));
+    ];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => '{"foo":"bar"}']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => TRUE]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => '{"foo":"bar"}']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => TRUE]];
 
     // Situations with context: non-front page, Dutch, with query.
-    $context = array(
+    $context = [
       'path' => 'llama',
       'front' => FALSE,
       'language' => 'nl',
-      'query' => array('foo' => 'bar'),
-    );
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => array());
+      'query' => ['foo' => 'bar'],
+    ];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => []];
     // Matching path, plus all matching variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => 'llama',
-      'data-drupal-link-query' => Json::encode(array('foo' => 'bar')),
-    );
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes + array('hreflang' => 'nl'));
+      'data-drupal-link-query' => Json::encode(['foo' => 'bar']),
+    ];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes + ['hreflang' => 'nl']];
     // Matching path, plus all non-matching variations.
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en'));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en']];
     unset($attributes['data-drupal-link-query']);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => TRUE]];
     // Special non-matching path, plus all variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => '<front>',
-    );
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en'));
+    ];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en']];
     unset($attributes['data-drupal-link-query']);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => TRUE]];
 
     // Situations with context: non-front page, Dutch, with query.
-    $context = array(
+    $context = [
       'path' => 'llama',
       'front' => FALSE,
       'language' => 'nl',
-      'query' => array('foo' => 'bar'),
-    );
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => array());
+      'query' => ['foo' => 'bar'],
+    ];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => []];
     // Matching path, plus all matching variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => 'llama',
-      'data-drupal-link-query' => Json::encode(array('foo' => 'bar')),
-    );
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes + array('hreflang' => 'nl'));
+      'data-drupal-link-query' => Json::encode(['foo' => 'bar']),
+    ];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes + ['hreflang' => 'nl']];
     // Matching path, plus all non-matching variations.
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en'));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en']];
     unset($attributes['data-drupal-link-query']);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => TRUE));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => TRUE]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => TRUE]];
     // Special non-matching path, plus all variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => '<front>',
-    );
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl'));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en'));
+    ];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl']];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en']];
     unset($attributes['data-drupal-link-query']);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => TRUE));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => TRUE]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl', 'data-drupal-link-query' => TRUE]];
 
     // Situations with context: front page, English, query.
-    $context = array(
+    $context = [
       'path' => 'myfrontpage',
       'front' => TRUE,
       'language' => 'en',
-      'query' => array('foo' => 'bar'),
-    );
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => array());
+      'query' => ['foo' => 'bar'],
+    ];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => []];
     // Matching path, plus all matching variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => 'myfrontpage',
-      'data-drupal-link-query' => Json::encode(array('foo' => 'bar')),
-    );
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes + array('hreflang' => 'en'));
+      'data-drupal-link-query' => Json::encode(['foo' => 'bar']),
+    ];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes + ['hreflang' => 'en']];
     // Matching path, plus all non-matching variations.
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl'));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl']];
     unset($attributes['data-drupal-link-query']);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => TRUE));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => TRUE]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => TRUE]];
     // Special matching path, plus all variations.
-    $attributes = array(
+    $attributes = [
       'data-drupal-link-system-path' => '<front>',
-      'data-drupal-link-query' => Json::encode(array('foo' => 'bar')),
-    );
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes);
-    $situations[] = array('context' => $context, 'is active' => TRUE, 'attributes' => $attributes + array('hreflang' => 'en'));
+      'data-drupal-link-query' => Json::encode(['foo' => 'bar']),
+    ];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes];
+    $situations[] = ['context' => $context, 'is active' => TRUE, 'attributes' => $attributes + ['hreflang' => 'en']];
     // Special matching path, plus all non-matching variations.
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'nl'));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'nl']];
     unset($attributes['data-drupal-link-query']);
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('data-drupal-link-query' => TRUE));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => ""));
-    $situations[] = array('context' => $context, 'is active' => FALSE, 'attributes' => $attributes + array('hreflang' => 'en', 'data-drupal-link-query' => TRUE));
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['data-drupal-link-query' => TRUE]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => ""]];
+    $situations[] = ['context' => $context, 'is active' => FALSE, 'attributes' => $attributes + ['hreflang' => 'en', 'data-drupal-link-query' => TRUE]];
 
     // Loop over the surrounding HTML variations.
-    $data = array();
+    $data = [];
     for ($h = 0; $h < count($html); $h++) {
       $html_prefix = $html[$h]['prefix'];
       $html_suffix = $html[$h]['suffix'];
@@ -272,13 +272,13 @@ public function providerTestSetLinkActiveClass() {
             else {
               $active_attributes = $situation['attributes'];
               if (!isset($active_attributes['class'])) {
-                $active_attributes['class'] = array();
+                $active_attributes['class'] = [];
               }
               $active_attributes['class'][] = 'is-active';
               $target_markup = $create_markup(new Attribute($active_attributes));
             }
 
-            $data[] = array($source_markup, $situation['context']['path'], $situation['context']['front'], $situation['context']['language'], $situation['context']['query'], $target_markup);
+            $data[] = [$source_markup, $situation['context']['path'], $situation['context']['front'], $situation['context']['language'], $situation['context']['query'], $target_markup];
           }
         }
       }
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/CustomPageExceptionHtmlSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/CustomPageExceptionHtmlSubscriberTest.php
index 81e7cc6a102d82d29d5d1dbc97c78f86d779d2ea..38cc28cc99e46e20c6a297897e56b3b752b3502b 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/CustomPageExceptionHtmlSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/CustomPageExceptionHtmlSubscriberTest.php
@@ -126,7 +126,7 @@ protected function tearDown() {
    * Tests onHandleException with a POST request.
    */
   public function testHandleWithPostRequest() {
-    $request = Request::create('/test', 'POST', array('name' => 'druplicon', 'pass' => '12345'));
+    $request = Request::create('/test', 'POST', ['name' => 'druplicon', 'pass' => '12345']);
 
     $request_context = new RequestContext();
     $request_context->fromRequest($request);
@@ -152,7 +152,7 @@ public function testHandleWithPostRequest() {
    * Tests onHandleException with a GET request.
    */
   public function testHandleWithGetRequest() {
-    $request = Request::create('/test', 'GET', array('name' => 'druplicon', 'pass' => '12345'));
+    $request = Request::create('/test', 'GET', ['name' => 'druplicon', 'pass' => '12345']);
     $request->attributes->set(AccessAwareRouterInterface::ACCESS_RESULT, AccessResult::forbidden()->addCacheTags(['druplicon']));
 
     $request_context = new RequestContext();
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/ModuleRouteSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/ModuleRouteSubscriberTest.php
index a3e5a8e93069cdc9f5589a0b3c13fa64f27ff390..6528d7327a9fee6faf76614132ce16705e8523a4 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/ModuleRouteSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/ModuleRouteSubscriberTest.php
@@ -24,10 +24,10 @@ class ModuleRouteSubscriberTest extends UnitTestCase {
   protected function setUp() {
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
 
-    $value_map = array(
-      array('enabled', TRUE),
-      array('disabled', FALSE),
-    );
+    $value_map = [
+      ['enabled', TRUE],
+      ['disabled', FALSE],
+    ];
 
     $this->moduleHandler->expects($this->any())
       ->method('moduleExists')
@@ -49,7 +49,7 @@ protected function setUp() {
    */
   public function testRemoveRoute($route_name, array $requirements, $removed) {
     $collection = new RouteCollection();
-    $route = new Route('', array(), $requirements);
+    $route = new Route('', [], $requirements);
     $collection->add($route_name, $route);
 
     $event = new RouteBuildEvent($collection, 'test');
@@ -68,18 +68,18 @@ public function testRemoveRoute($route_name, array $requirements, $removed) {
    * Data provider for testRemoveRoute().
    */
   public function providerTestRemoveRoute() {
-    return array(
-      array('enabled', array('_module_dependencies' => 'enabled'), FALSE),
-      array('disabled', array('_module_dependencies' => 'disabled'), TRUE),
-      array('enabled_or', array('_module_dependencies' => 'disabled,enabled'), FALSE),
-      array('enabled_or', array('_module_dependencies' => 'enabled,disabled'), FALSE),
-      array('disabled_or', array('_module_dependencies' => 'disabled,disabled'), TRUE),
-      array('enabled_and', array('_module_dependencies' => 'enabled+enabled'), FALSE),
-      array('enabled_and', array('_module_dependencies' => 'enabled+disabled'), TRUE),
-      array('enabled_and', array('_module_dependencies' => 'disabled+enabled'), TRUE),
-      array('disabled_and', array('_module_dependencies' => 'disabled+disabled'), TRUE),
-      array('no_dependencies', array(), FALSE),
-    );
+    return [
+      ['enabled', ['_module_dependencies' => 'enabled'], FALSE],
+      ['disabled', ['_module_dependencies' => 'disabled'], TRUE],
+      ['enabled_or', ['_module_dependencies' => 'disabled,enabled'], FALSE],
+      ['enabled_or', ['_module_dependencies' => 'enabled,disabled'], FALSE],
+      ['disabled_or', ['_module_dependencies' => 'disabled,disabled'], TRUE],
+      ['enabled_and', ['_module_dependencies' => 'enabled+enabled'], FALSE],
+      ['enabled_and', ['_module_dependencies' => 'enabled+disabled'], TRUE],
+      ['enabled_and', ['_module_dependencies' => 'disabled+enabled'], TRUE],
+      ['disabled_and', ['_module_dependencies' => 'disabled+disabled'], TRUE],
+      ['no_dependencies', [], FALSE],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/PathRootsSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/PathRootsSubscriberTest.php
index 96a922829a1e055da0af7083629c113b5eb57997..ea4ec9f8d5f70ab6f2c30a311786f08a3c2effd7 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/PathRootsSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/PathRootsSubscriberTest.php
@@ -66,7 +66,7 @@ public function testSubscribing() {
 
     $this->state->expects($this->once())
       ->method('set')
-      ->with('router.path_roots', array('test', 'test2', 'test1'));
+      ->with('router.path_roots', ['test', 'test2', 'test1']);
 
     $this->pathRootsSubscriber->onRouteFinished();
   }
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
index b945b141ffda87ec234d1c402653dfe408683723..3f80e4d227f65fd741cc63415f9eb86be0d05473 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
@@ -82,7 +82,7 @@ public function testDestinationRedirect(Request $request, $expected) {
     $request->headers->set('HOST', 'example.com');
 
     $listener = new RedirectResponseSubscriber($this->urlAssembler, $this->requestContext);
-    $dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'checkRedirectUrl'));
+    $dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'checkRedirectUrl']);
     $event = new FilterResponseEvent($kernel, $request, HttpKernelInterface::SUB_REQUEST, $response);
     $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
@@ -101,16 +101,16 @@ public function testDestinationRedirect(Request $request, $expected) {
    * @see \Drupal\Tests\Core\EventSubscriber\RedirectResponseSubscriberTest::testDestinationRedirect()
    */
   public static function providerTestDestinationRedirect() {
-    return array(
-      array(new Request(), FALSE),
-      array(new Request(array('destination' => 'test')), 'http://example.com/drupal/test'),
-      array(new Request(array('destination' => '/drupal/test')), 'http://example.com/drupal/test'),
-      array(new Request(array('destination' => 'example.com')), 'http://example.com/drupal/example.com'),
-      array(new Request(array('destination' => 'example:com')), 'http://example.com/drupal/example:com'),
-      array(new Request(array('destination' => 'javascript:alert(0)')), 'http://example.com/drupal/javascript:alert(0)'),
-      array(new Request(array('destination' => 'http://example.com/drupal/')), 'http://example.com/drupal/'),
-      array(new Request(array('destination' => 'http://example.com/drupal/test')), 'http://example.com/drupal/test'),
-    );
+    return [
+      [new Request(), FALSE],
+      [new Request(['destination' => 'test']), 'http://example.com/drupal/test'],
+      [new Request(['destination' => '/drupal/test']), 'http://example.com/drupal/test'],
+      [new Request(['destination' => 'example.com']), 'http://example.com/drupal/example.com'],
+      [new Request(['destination' => 'example:com']), 'http://example.com/drupal/example:com'],
+      [new Request(['destination' => 'javascript:alert(0)']), 'http://example.com/drupal/javascript:alert(0)'],
+      [new Request(['destination' => 'http://example.com/drupal/']), 'http://example.com/drupal/'],
+      [new Request(['destination' => 'http://example.com/drupal/test']), 'http://example.com/drupal/test'],
+    ];
   }
 
   /**
@@ -124,7 +124,7 @@ public function testDestinationRedirectToExternalUrl($request, $expected) {
     $response = new RedirectResponse('http://other-example.com');
 
     $listener = new RedirectResponseSubscriber($this->urlAssembler, $this->requestContext);
-    $dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'checkRedirectUrl'));
+    $dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'checkRedirectUrl']);
     $event = new FilterResponseEvent($kernel, $request, HttpKernelInterface::SUB_REQUEST, $response);
     $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
@@ -142,7 +142,7 @@ public function testRedirectWithOptInExternalUrl() {
     $request->headers->set('HOST', 'example.com');
 
     $listener = new RedirectResponseSubscriber($this->urlAssembler, $this->requestContext);
-    $dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'checkRedirectUrl'));
+    $dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'checkRedirectUrl']);
     $event = new FilterResponseEvent($kernel, $request, HttpKernelInterface::SUB_REQUEST, $response);
     $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
@@ -175,7 +175,7 @@ public function testDestinationRedirectWithInvalidUrl(Request $request) {
     $response = new RedirectResponse('http://example.com/drupal');
 
     $listener = new RedirectResponseSubscriber($this->urlAssembler, $this->requestContext);
-    $dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'checkRedirectUrl'));
+    $dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'checkRedirectUrl']);
     $event = new FilterResponseEvent($kernel, $request, HttpKernelInterface::SUB_REQUEST, $response);
     $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
@@ -187,8 +187,8 @@ public function testDestinationRedirectWithInvalidUrl(Request $request) {
    */
   public function providerTestDestinationRedirectWithInvalidUrl() {
     $data = [];
-    $data[] = [new Request(array('destination' => '//example:com'))];
-    $data[] = [new Request(array('destination' => '//example:com/test'))];
+    $data[] = [new Request(['destination' => '//example:com'])];
+    $data[] = [new Request(['destination' => '//example:com/test'])];
     $data['absolute external url'] = [new Request(['destination' => 'http://example.com'])];
     $data['absolute external url with folder'] = [new Request(['destination' => 'http://example.ca/drupal'])];
     $data['path without drupal basepath'] = [new Request(['destination' => '/test'])];
diff --git a/core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php b/core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php
index 56f913ae250eba8f2e30b0e6bea50b34ad9ba8bf..29677b2c6ec97f21b42e6d41f43120c234599002 100644
--- a/core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php
@@ -24,11 +24,11 @@ class DefaultConfigTest extends UnitTestCase {
    */
   public function testConfigIsEmpty() {
     $config = Yaml::parse(file_get_contents($this->root . '/core/config/install/core.extension.yml'));
-    $expected = array(
-      'module' => array(),
-      'theme' => array(),
+    $expected = [
+      'module' => [],
+      'theme' => [],
       'profile' => '',
-    );
+    ];
     $this->assertEquals($expected, $config);
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Extension/ModuleHandlerTest.php b/core/tests/Drupal/Tests/Core/Extension/ModuleHandlerTest.php
index 2256045bb95a208f60a15579c6d7ebfdcde40d7c..42a76bac5f336d14c47bfef6fcbc6e2bc775a117 100644
--- a/core/tests/Drupal/Tests/Core/Extension/ModuleHandlerTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/ModuleHandlerTest.php
@@ -35,13 +35,13 @@ protected function setUp() {
     parent::setUp();
 
     $this->cacheBackend = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
-    $this->moduleHandler = new ModuleHandler($this->root, array(
-      'module_handler_test' => array(
+    $this->moduleHandler = new ModuleHandler($this->root, [
+      'module_handler_test' => [
         'type' => 'module',
         'pathname' => 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.info.yml',
         'filename' => 'module_handler_test.module',
-      )
-    ), $this->cacheBackend);
+      ]
+    ], $this->cacheBackend);
   }
 
   /**
@@ -85,17 +85,17 @@ public function testLoadAllModules() {
    */
   public function testModuleReloading() {
     $module_handler = $this->getMockBuilder('Drupal\Core\Extension\ModuleHandler')
-      ->setConstructorArgs(array(
+      ->setConstructorArgs([
         $this->root,
-        array(
-          'module_handler_test' => array(
+        [
+          'module_handler_test' => [
             'type' => 'module',
             'pathname' => 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.info.yml',
             'filename' => 'module_handler_test.module',
-          )
-        ), $this->cacheBackend
-      ))
-      ->setMethods(array('load'))
+          ]
+        ], $this->cacheBackend
+      ])
+      ->setMethods(['load'])
       ->getMock();
     // First reload.
     $module_handler->expects($this->at(0))
@@ -130,9 +130,9 @@ public function testIsLoaded() {
    * @covers ::getModuleList
    */
   public function testGetModuleList() {
-    $this->assertEquals($this->moduleHandler->getModuleList(), array(
+    $this->assertEquals($this->moduleHandler->getModuleList(), [
       'module_handler_test' => new Extension($this->root, 'module', 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.info.yml', 'module_handler_test.module'),
-    ));
+    ]);
   }
 
   /**
@@ -160,17 +160,17 @@ public function testGetModuleWithNonExistingModule() {
    */
   public function testSetModuleList() {
     $module_handler = $this->getMockBuilder('Drupal\Core\Extension\ModuleHandler')
-      ->setConstructorArgs(array(
-        $this->root, array(), $this->cacheBackend
-      ))
-      ->setMethods(array('resetImplementations'))
+      ->setConstructorArgs([
+        $this->root, [], $this->cacheBackend
+      ])
+      ->setMethods(['resetImplementations'])
       ->getMock();
 
     // Ensure we reset implementations when settings a new modules list.
     $module_handler->expects($this->once())->method('resetImplementations');
 
     // Make sure we're starting empty.
-    $this->assertEquals($module_handler->getModuleList(), array());
+    $this->assertEquals($module_handler->getModuleList(), []);
 
     // Replace the list with a prebuilt list.
     $module_handler->setModuleList($this->moduleHandler->getModuleList());
@@ -188,10 +188,10 @@ public function testSetModuleList() {
   public function testAddModule() {
 
     $module_handler = $this->getMockBuilder('Drupal\Core\Extension\ModuleHandler')
-      ->setConstructorArgs(array(
-        $this->root, array(), $this->cacheBackend
-      ))
-      ->setMethods(array('resetImplementations'))
+      ->setConstructorArgs([
+        $this->root, [], $this->cacheBackend
+      ])
+      ->setMethods(['resetImplementations'])
       ->getMock();
 
     // Ensure we reset implementations when settings a new modules list.
@@ -210,10 +210,10 @@ public function testAddModule() {
   public function testAddProfile() {
 
     $module_handler = $this->getMockBuilder('Drupal\Core\Extension\ModuleHandler')
-      ->setConstructorArgs(array(
-        $this->root, array(), $this->cacheBackend
-      ))
-      ->setMethods(array('resetImplementations'))
+      ->setConstructorArgs([
+        $this->root, [], $this->cacheBackend
+      ])
+      ->setMethods(['resetImplementations'])
       ->getMock();
 
     // Ensure we reset implementations when settings a new modules list.
@@ -240,17 +240,17 @@ public function testModuleExists() {
   public function testLoadAllIncludes() {
     $this->assertTrue(TRUE);
     $module_handler = $this->getMockBuilder('Drupal\Core\Extension\ModuleHandler')
-      ->setConstructorArgs(array(
+      ->setConstructorArgs([
         $this->root,
-        array(
-          'module_handler_test' => array(
+        [
+          'module_handler_test' => [
             'type' => 'module',
             'pathname' => 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.info.yml',
             'filename' => 'module_handler_test.module',
-          )
-        ), $this->cacheBackend
-      ))
-      ->setMethods(array('loadInclude'))
+          ]
+        ], $this->cacheBackend
+      ])
+      ->setMethods(['loadInclude'])
       ->getMock();
 
     // Ensure we reset implementations when settings a new modules list.
@@ -280,9 +280,9 @@ public function testLoadInclude() {
    * @covers ::invoke
    */
   public function testInvokeModuleEnabled() {
-    $this->assertTrue($this->moduleHandler->invoke('module_handler_test', 'hook', array(TRUE)), 'Installed module runs hook.');
-    $this->assertFalse($this->moduleHandler->invoke('module_handler_test', 'hook', array(FALSE)), 'Installed module runs hook.');
-    $this->assertNull($this->moduleHandler->invoke('module_handler_test_fake', 'hook', array(FALSE)), 'Installed module runs hook.');
+    $this->assertTrue($this->moduleHandler->invoke('module_handler_test', 'hook', [TRUE]), 'Installed module runs hook.');
+    $this->assertFalse($this->moduleHandler->invoke('module_handler_test', 'hook', [FALSE]), 'Installed module runs hook.');
+    $this->assertNull($this->moduleHandler->invoke('module_handler_test_fake', 'hook', [FALSE]), 'Installed module runs hook.');
   }
 
   /**
@@ -298,7 +298,7 @@ public function testImplementsHookModuleEnabled() {
     $this->assertTrue($this->moduleHandler->implementsHook('module_handler_test_added', 'hook'), 'Runtime added module with implementation in include found.');
 
     $this->moduleHandler->addModule('module_handler_test_no_hook', 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_added');
-    $this->assertFalse($this->moduleHandler->implementsHook('module_handler_test_no_hook', 'hook', array(TRUE)), 'Missing implementation not found.');
+    $this->assertFalse($this->moduleHandler->implementsHook('module_handler_test_no_hook', 'hook', [TRUE]), 'Missing implementation not found.');
   }
 
   /**
@@ -309,7 +309,7 @@ public function testImplementsHookModuleEnabled() {
    * @covers ::buildImplementationInfo
    */
   public function testGetImplementations() {
-    $this->assertEquals(array('module_handler_test'), $this->moduleHandler->getImplementations('hook'));
+    $this->assertEquals(['module_handler_test'], $this->moduleHandler->getImplementations('hook'));
   }
 
   /**
@@ -322,26 +322,26 @@ public function testCachedGetImplementations() {
     $this->cacheBackend->expects($this->exactly(1))
       ->method('get')
       ->will($this->onConsecutiveCalls(
-        (object) array('data' => array('hook' => array('module_handler_test' => 'test')))
+        (object) ['data' => ['hook' => ['module_handler_test' => 'test']]]
       ));
 
     // Ensure buildImplementationInfo doesn't get called and that we work off cached results.
     $module_handler = $this->getMockBuilder('Drupal\Core\Extension\ModuleHandler')
-      ->setConstructorArgs(array(
-        $this->root, array(
-          'module_handler_test' => array(
+      ->setConstructorArgs([
+        $this->root, [
+          'module_handler_test' => [
             'type' => 'module',
             'pathname' => 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.info.yml',
             'filename' => 'module_handler_test.module',
-          )
-        ), $this->cacheBackend
-      ))
-      ->setMethods(array('buildImplementationInfo', 'loadInclude'))
+          ]
+        ], $this->cacheBackend
+      ])
+      ->setMethods(['buildImplementationInfo', 'loadInclude'])
       ->getMock();
 
     $module_handler->expects($this->never())->method('buildImplementationInfo');
     $module_handler->expects($this->once())->method('loadInclude');
-    $this->assertEquals(array('module_handler_test'), $module_handler->getImplementations('hook'));
+    $this->assertEquals(['module_handler_test'], $module_handler->getImplementations('hook'));
   }
 
   /**
@@ -354,28 +354,28 @@ public function testCachedGetImplementationsMissingMethod() {
     $this->cacheBackend->expects($this->exactly(1))
       ->method('get')
       ->will($this->onConsecutiveCalls(
-        (object) array('data' => array('hook' => array(
-          'module_handler_test' => array(),
-          'module_handler_test_missing' => array(),
-        )))
+        (object) ['data' => ['hook' => [
+          'module_handler_test' => [],
+          'module_handler_test_missing' => [],
+        ]]]
       ));
 
     // Ensure buildImplementationInfo doesn't get called and that we work off cached results.
     $module_handler = $this->getMockBuilder('Drupal\Core\Extension\ModuleHandler')
-      ->setConstructorArgs(array(
-        $this->root, array(
-          'module_handler_test' => array(
+      ->setConstructorArgs([
+        $this->root, [
+          'module_handler_test' => [
             'type' => 'module',
             'pathname' => 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.info.yml',
             'filename' => 'module_handler_test.module',
-          )
-        ), $this->cacheBackend
-      ))
-      ->setMethods(array('buildImplementationInfo'))
+          ]
+        ], $this->cacheBackend
+      ])
+      ->setMethods(['buildImplementationInfo'])
       ->getMock();
 
     $module_handler->expects($this->never())->method('buildImplementationInfo');
-    $this->assertEquals(array('module_handler_test'), $module_handler->getImplementations('hook'));
+    $this->assertEquals(['module_handler_test'], $module_handler->getImplementations('hook'));
   }
 
   /**
@@ -386,7 +386,7 @@ public function testCachedGetImplementationsMissingMethod() {
   public function testInvokeAll() {
     $this->moduleHandler->addModule('module_handler_test_all1', 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_all1');
     $this->moduleHandler->addModule('module_handler_test_all2', 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_all2');
-    $this->assertEquals(array(TRUE, TRUE, TRUE), $this->moduleHandler->invokeAll('hook', array(TRUE)));
+    $this->assertEquals([TRUE, TRUE, TRUE], $this->moduleHandler->invokeAll('hook', [TRUE]));
   }
 
   /**
@@ -421,20 +421,20 @@ public function testGetHookInfo() {
       ->method('get')
       ->will($this->onConsecutiveCalls(
         NULL,
-        (object) array('data' =>
-          array('hook_foo' => array('group' => 'hook'))))
+        (object) ['data' =>
+          ['hook_foo' => ['group' => 'hook']]])
       );
 
     // Results from building from mocked environment.
-    $this->assertEquals(array(
-      'hook' => array('group' => 'hook'),
-    ), $this->moduleHandler->getHookInfo());
+    $this->assertEquals([
+      'hook' => ['group' => 'hook'],
+    ], $this->moduleHandler->getHookInfo());
 
     // Reset local cache so we get our synthetic result from the cache handler.
     $this->moduleHandler->resetImplementations();
-    $this->assertEquals(array(
-      'hook_foo' => array('group' => 'hook'),
-    ), $this->moduleHandler->getHookInfo());
+    $this->assertEquals([
+      'hook_foo' => ['group' => 'hook'],
+    ], $this->moduleHandler->getHookInfo());
   }
 
   /**
@@ -483,33 +483,33 @@ public function testDependencyParsing($dependency, $expected) {
    * Provider for testing dependency parsing.
    */
   public function dependencyProvider() {
-    return array(
-      array('system', array('name' => 'system')),
-      array('taxonomy', array('name' => 'taxonomy')),
-      array('views', array('name' => 'views')),
-      array('views_ui(8.x-1.0)', array('name' => 'views_ui', 'original_version' => ' (8.x-1.0)', 'versions' => array(array('op' => '=', 'version' => '1.0')))),
+    return [
+      ['system', ['name' => 'system']],
+      ['taxonomy', ['name' => 'taxonomy']],
+      ['views', ['name' => 'views']],
+      ['views_ui(8.x-1.0)', ['name' => 'views_ui', 'original_version' => ' (8.x-1.0)', 'versions' => [['op' => '=', 'version' => '1.0']]]],
       // Not supported?.
       // array('views_ui(8.x-1.1-beta)', array('name' => 'views_ui', 'original_version' => ' (8.x-1.1-beta)', 'versions' => array(array('op' => '=', 'version' => '1.1-beta')))),
-      array('views_ui(8.x-1.1-alpha12)', array('name' => 'views_ui', 'original_version' => ' (8.x-1.1-alpha12)', 'versions' => array(array('op' => '=', 'version' => '1.1-alpha12')))),
-      array('views_ui(8.x-1.1-beta8)', array('name' => 'views_ui', 'original_version' => ' (8.x-1.1-beta8)', 'versions' => array(array('op' => '=', 'version' => '1.1-beta8')))),
-      array('views_ui(8.x-1.1-rc11)', array('name' => 'views_ui', 'original_version' => ' (8.x-1.1-rc11)', 'versions' => array(array('op' => '=', 'version' => '1.1-rc11')))),
-      array('views_ui(8.x-1.12)', array('name' => 'views_ui', 'original_version' => ' (8.x-1.12)', 'versions' => array(array('op' => '=', 'version' => '1.12')))),
-      array('views_ui(8.x-1.x)', array('name' => 'views_ui', 'original_version' => ' (8.x-1.x)', 'versions' => array(array('op' => '<', 'version' => '2.x'), array('op' => '>=', 'version' => '1.x')))),
-      array('views_ui( <= 8.x-1.x)', array('name' => 'views_ui', 'original_version' => ' ( <= 8.x-1.x)', 'versions' => array(array('op' => '<=', 'version' => '2.x')))),
-      array('views_ui(<= 8.x-1.x)', array('name' => 'views_ui', 'original_version' => ' (<= 8.x-1.x)', 'versions' => array(array('op' => '<=', 'version' => '2.x')))),
-      array('views_ui( <=8.x-1.x)', array('name' => 'views_ui', 'original_version' => ' ( <=8.x-1.x)', 'versions' => array(array('op' => '<=', 'version' => '2.x')))),
-      array('views_ui(>8.x-1.x)', array('name' => 'views_ui', 'original_version' => ' (>8.x-1.x)', 'versions' => array(array('op' => '>', 'version' => '2.x')))),
-      array('drupal:views_ui(>8.x-1.x)', array('project' => 'drupal', 'name' => 'views_ui', 'original_version' => ' (>8.x-1.x)', 'versions' => array(array('op' => '>', 'version' => '2.x')))),
-    );
+      ['views_ui(8.x-1.1-alpha12)', ['name' => 'views_ui', 'original_version' => ' (8.x-1.1-alpha12)', 'versions' => [['op' => '=', 'version' => '1.1-alpha12']]]],
+      ['views_ui(8.x-1.1-beta8)', ['name' => 'views_ui', 'original_version' => ' (8.x-1.1-beta8)', 'versions' => [['op' => '=', 'version' => '1.1-beta8']]]],
+      ['views_ui(8.x-1.1-rc11)', ['name' => 'views_ui', 'original_version' => ' (8.x-1.1-rc11)', 'versions' => [['op' => '=', 'version' => '1.1-rc11']]]],
+      ['views_ui(8.x-1.12)', ['name' => 'views_ui', 'original_version' => ' (8.x-1.12)', 'versions' => [['op' => '=', 'version' => '1.12']]]],
+      ['views_ui(8.x-1.x)', ['name' => 'views_ui', 'original_version' => ' (8.x-1.x)', 'versions' => [['op' => '<', 'version' => '2.x'], ['op' => '>=', 'version' => '1.x']]]],
+      ['views_ui( <= 8.x-1.x)', ['name' => 'views_ui', 'original_version' => ' ( <= 8.x-1.x)', 'versions' => [['op' => '<=', 'version' => '2.x']]]],
+      ['views_ui(<= 8.x-1.x)', ['name' => 'views_ui', 'original_version' => ' (<= 8.x-1.x)', 'versions' => [['op' => '<=', 'version' => '2.x']]]],
+      ['views_ui( <=8.x-1.x)', ['name' => 'views_ui', 'original_version' => ' ( <=8.x-1.x)', 'versions' => [['op' => '<=', 'version' => '2.x']]]],
+      ['views_ui(>8.x-1.x)', ['name' => 'views_ui', 'original_version' => ' (>8.x-1.x)', 'versions' => [['op' => '>', 'version' => '2.x']]]],
+      ['drupal:views_ui(>8.x-1.x)', ['project' => 'drupal', 'name' => 'views_ui', 'original_version' => ' (>8.x-1.x)', 'versions' => [['op' => '>', 'version' => '2.x']]]],
+    ];
   }
 
   /**
    * @covers ::getModuleDirectories
    */
   public function testGetModuleDirectories() {
-    $this->moduleHandler->setModuleList(array());
+    $this->moduleHandler->setModuleList([]);
     $this->moduleHandler->addModule('module', 'place');
-    $this->assertEquals(array('module' => $this->root . '/place'), $this->moduleHandler->getModuleDirectories());
+    $this->assertEquals(['module' => $this->root . '/place'], $this->moduleHandler->getModuleDirectories());
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Extension/ThemeHandlerTest.php b/core/tests/Drupal/Tests/Core/Extension/ThemeHandlerTest.php
index 5045d831c29e589697bc8cb5696fd8143ffc6fc0..8c105f25ae8d33e907ed83faa1c2eae682a98e05 100644
--- a/core/tests/Drupal/Tests/Core/Extension/ThemeHandlerTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/ThemeHandlerTest.php
@@ -70,15 +70,15 @@ class ThemeHandlerTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
 
-    $this->configFactory = $this->getConfigFactoryStub(array(
-      'core.extension' => array(
-        'module' => array(),
-        'theme' => array(),
-        'disabled' => array(
-          'theme' => array(),
-        ),
-      ),
-    ));
+    $this->configFactory = $this->getConfigFactoryStub([
+      'core.extension' => [
+        'module' => [],
+        'theme' => [],
+        'disabled' => [
+          'theme' => [],
+        ],
+      ],
+    ]);
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $this->state = new State(new KeyValueMemoryFactory(), new MemoryBackend('test'), new NullLockBackend());
     $this->infoParser = $this->getMock('Drupal\Core\Extension\InfoParserInterface');
@@ -100,15 +100,15 @@ public function testRebuildThemeData() {
     $this->extensionDiscovery->expects($this->at(0))
       ->method('scan')
       ->with('theme')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'seven' => new Extension($this->root, 'theme', $this->root . '/core/themes/seven/seven.info.yml', 'seven.theme'),
-      )));
+      ]));
     $this->extensionDiscovery->expects($this->at(1))
       ->method('scan')
       ->with('theme_engine')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'twig' => new Extension($this->root, 'theme_engine', $this->root . '/core/themes/engines/twig/twig.info.yml', 'twig.engine'),
-      )));
+      ]));
     $this->infoParser->expects($this->once())
       ->method('parse')
       ->with($this->root . '/core/themes/seven/seven.info.yml')
@@ -136,7 +136,7 @@ public function testRebuildThemeData() {
     $this->assertEquals('twig', $info->prefix);
 
     $this->assertEquals('twig', $info->info['engine']);
-    $this->assertEquals(array('seven/global-styling'), $info->info['libraries']);
+    $this->assertEquals(['seven/global-styling'], $info->info['libraries']);
   }
 
   /**
@@ -160,16 +160,16 @@ public function testRebuildThemeDataWithThemeParents() {
     $this->extensionDiscovery->expects($this->at(0))
       ->method('scan')
       ->with('theme')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'test_subtheme' => new Extension($this->root, 'theme', $this->root . '/core/modules/system/tests/themes/test_subtheme/test_subtheme.info.yml', 'test_subtheme.info.yml'),
         'test_basetheme' => new Extension($this->root, 'theme', $this->root . '/core/modules/system/tests/themes/test_basetheme/test_basetheme.info.yml', 'test_basetheme.info.yml'),
-      )));
+      ]));
     $this->extensionDiscovery->expects($this->at(1))
       ->method('scan')
       ->with('theme_engine')
-      ->will($this->returnValue(array(
+      ->will($this->returnValue([
         'twig' => new Extension($this->root, 'theme_engine', $this->root . '/core/themes/engines/twig/twig.info.yml', 'twig.engine'),
-      )));
+      ]));
     $this->infoParser->expects($this->at(0))
       ->method('parse')
       ->with($this->root . '/core/modules/system/tests/themes/test_subtheme/test_subtheme.info.yml')
@@ -202,7 +202,7 @@ public function testRebuildThemeDataWithThemeParents() {
 
     // Test the parent/child-theme properties.
     $info_subtheme->info['base theme'] = 'test_basetheme';
-    $info_basetheme->sub_themes = array('test_subtheme');
+    $info_basetheme->sub_themes = ['test_subtheme'];
 
     $this->assertEquals($this->root . '/core/themes/engines/twig/twig.engine', $info_basetheme->owner);
     $this->assertEquals('twig', $info_basetheme->prefix);
@@ -234,73 +234,73 @@ public function testGetBaseThemes(array $themes, $theme, array $expected) {
    *   An array of theme test data.
    */
   public function providerTestGetBaseThemes() {
-    $data = array();
+    $data = [];
 
     // Tests a theme without any base theme.
-    $themes = array();
-    $themes['test_1'] = (object) array(
+    $themes = [];
+    $themes['test_1'] = (object) [
       'name' => 'test_1',
-      'info' => array(
+      'info' => [
         'name' => 'test_1',
-      ),
-    );
-    $data[] = array($themes, 'test_1', array());
+      ],
+    ];
+    $data[] = [$themes, 'test_1', []];
 
     // Tests a theme with a non existing base theme.
-    $themes = array();
-    $themes['test_1'] = (object) array(
+    $themes = [];
+    $themes['test_1'] = (object) [
       'name' => 'test_1',
-      'info' => array(
+      'info' => [
         'name' => 'test_1',
         'base theme' => 'test_2',
-      ),
-    );
-    $data[] = array($themes, 'test_1', array('test_2' => NULL));
+      ],
+    ];
+    $data[] = [$themes, 'test_1', ['test_2' => NULL]];
 
     // Tests a theme with a single existing base theme.
-    $themes = array();
-    $themes['test_1'] = (object) array(
+    $themes = [];
+    $themes['test_1'] = (object) [
       'name' => 'test_1',
-      'info' => array(
+      'info' => [
         'name' => 'test_1',
         'base theme' => 'test_2',
-      ),
-    );
-    $themes['test_2'] = (object) array(
+      ],
+    ];
+    $themes['test_2'] = (object) [
       'name' => 'test_2',
-      'info' => array(
+      'info' => [
         'name' => 'test_2',
-      ),
-    );
-    $data[] = array($themes, 'test_1', array('test_2' => 'test_2'));
+      ],
+    ];
+    $data[] = [$themes, 'test_1', ['test_2' => 'test_2']];
 
     // Tests a theme with multiple base themes.
-    $themes = array();
-    $themes['test_1'] = (object) array(
+    $themes = [];
+    $themes['test_1'] = (object) [
       'name' => 'test_1',
-      'info' => array(
+      'info' => [
         'name' => 'test_1',
         'base theme' => 'test_2',
-      ),
-    );
-    $themes['test_2'] = (object) array(
+      ],
+    ];
+    $themes['test_2'] = (object) [
       'name' => 'test_2',
-      'info' => array(
+      'info' => [
         'name' => 'test_2',
         'base theme' => 'test_3',
-      ),
-    );
-    $themes['test_3'] = (object) array(
+      ],
+    ];
+    $themes['test_3'] = (object) [
       'name' => 'test_3',
-      'info' => array(
+      'info' => [
         'name' => 'test_3',
-      ),
-    );
-    $data[] = array(
+      ],
+    ];
+    $data[] = [
       $themes,
       'test_1',
-      array('test_2' => 'test_2', 'test_3' => 'test_3'),
-    );
+      ['test_2' => 'test_2', 'test_3' => 'test_3'],
+    ];
 
     return $data;
   }
diff --git a/core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.module b/core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.module
index 18bf23c351728f14bafb1cb2f4a6126d3945da7a..3e0d59c680730dbb31c74b4079181737c63e3944 100644
--- a/core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.module
+++ b/core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test/module_handler_test.module
@@ -9,9 +9,9 @@
  * Implements hook_hook_info().
  */
 function module_handler_test_hook_info() {
-  return array(
-    'hook' => array('group' => 'hook'),
-  );
+  return [
+    'hook' => ['group' => 'hook'],
+  ];
 }
 
 function module_handler_test_hook($arg) { return $arg; }
diff --git a/core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_all1/module_handler_test_all1.module b/core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_all1/module_handler_test_all1.module
index 4689c02ce427939139790d17eae919261b1c0328..563b7a5c2da45fafc916a7ab139c1a1431871e17 100644
--- a/core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_all1/module_handler_test_all1.module
+++ b/core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_all1/module_handler_test_all1.module
@@ -8,4 +8,4 @@
 /**
  * Returns an array to test nested merge in invoke all.
  */
-function module_handler_test_all1_hook($arg) { return array($arg); }
+function module_handler_test_all1_hook($arg) { return [$arg]; }
diff --git a/core/tests/Drupal/Tests/Core/Field/FieldDefinitionListenerTest.php b/core/tests/Drupal/Tests/Core/Field/FieldDefinitionListenerTest.php
index 9ee719eddfdbe2fe9a31f2710ecb47ddfdf70754..01d0bb2686c2e107af3eb9793c5be466e143eb07 100644
--- a/core/tests/Drupal/Tests/Core/Field/FieldDefinitionListenerTest.php
+++ b/core/tests/Drupal/Tests/Core/Field/FieldDefinitionListenerTest.php
@@ -77,7 +77,7 @@ protected function setUp() {
    * @param \Drupal\Core\Entity\EntityTypeInterface[]|\Prophecy\Prophecy\ProphecyInterface[] $definitions
    *   (optional) An array of entity type definitions.
    */
-  protected function setUpEntityManager($definitions = array()) {
+  protected function setUpEntityManager($definitions = []) {
     $class = $this->getMockClass(EntityInterface::class);
     foreach ($definitions as $key => $entity_type) {
       // \Drupal\Core\Entity\EntityTypeInterface::getLinkTemplates() is called
diff --git a/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php b/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
index 9440d08fafb4d952698380ed05495d7aa677e09e..15f52a6dc8cb9d2236df490e425d99861561b1ce 100644
--- a/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
@@ -71,12 +71,12 @@ public function testCancelLinkRouteWithParams() {
    */
   public function testCancelLinkRouteWithUrl() {
     $cancel_route = new Url(
-      'foo_bar.baz', array(
+      'foo_bar.baz', [
         'baz' => 'banana',
-      ),
-      array(
+      ],
+      [
         'absolute' => TRUE,
-      )
+      ]
     );
     $form = $this->getMock('Drupal\Core\Form\ConfirmFormInterface');
     $form->expects($this->any())
@@ -95,7 +95,7 @@ public function testCancelLinkRouteWithUrl() {
    * @dataProvider providerTestCancelLinkDestination
    */
   public function testCancelLinkDestination($destination) {
-    $query = array('destination' => $destination);
+    $query = ['destination' => $destination];
     $form = $this->getMock('Drupal\Core\Form\ConfirmFormInterface');
 
     $path_validator = $this->getMock('Drupal\Core\Path\PathValidatorInterface');
diff --git a/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php b/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
index dfbf843a0c75c1cc70091a6e0185b1ee0b116149..0b6ccff6702845334699fa17e6a9aeedaba978c3 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
@@ -171,10 +171,10 @@ public function testHandleFormStateResponse($class, $form_state_key) {
    * Provides test data for testHandleFormStateResponse().
    */
   public function formStateResponseProvider() {
-    return array(
-      array('Symfony\Component\HttpFoundation\Response', 'response'),
-      array('Symfony\Component\HttpFoundation\RedirectResponse', 'redirect'),
-    );
+    return [
+      ['Symfony\Component\HttpFoundation\Response', 'response'],
+      ['Symfony\Component\HttpFoundation\RedirectResponse', 'redirect'],
+    ];
   }
 
   /**
@@ -251,7 +251,7 @@ public function testGetFormWithObject() {
   public function testGetFormWithClassString() {
     $form_id = '\Drupal\Tests\Core\Form\TestForm';
     $object = new TestForm();
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $expected_form = $object->buildForm($form, $form_state);
 
@@ -281,7 +281,7 @@ public function testBuildFormWithString() {
   public function testBuildFormWithClassString() {
     $form_id = '\Drupal\Tests\Core\Form\TestForm';
     $object = new TestForm();
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $expected_form = $object->buildForm($form, $form_state);
 
diff --git a/core/tests/Drupal/Tests/Core/Form/FormHelperTest.php b/core/tests/Drupal/Tests/Core/Form/FormHelperTest.php
index 1ef17e9e9a52c11d067d77165d034dc81c676b83..f60b8e64c13c2121e59ae55f1ac373494b9abe24 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormHelperTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormHelperTest.php
@@ -19,65 +19,65 @@ class FormHelperTest extends UnitTestCase {
   function testRewriteStatesSelector() {
 
     // Simple selectors.
-    $value = array('value' => 'medium');
-    $form['foo']['#states'] = array(
-      'visible' => array(
+    $value = ['value' => 'medium'];
+    $form['foo']['#states'] = [
+      'visible' => [
         'select[name="fields[foo-id][settings_edit_form][settings][image_style]"]' => $value,
-      ),
-    );
+      ],
+    ];
     FormHelper::rewriteStatesSelector($form, 'fields[foo-id][settings_edit_form]', 'options');
     $expected_selector = 'select[name="options[settings][image_style]"]';
     $this->assertSame($form['foo']['#states']['visible'][$expected_selector], $value, 'The #states selector was not properly rewritten.');
 
     // Complex selectors.
-    $form = array();
-    $form['bar']['#states'] = array(
-      'visible' => array(
-        array(
-          ':input[name="menu[type]"]' => array('value' => 'normal'),
-        ),
-        array(
-          ':input[name="menu[type]"]' => array('value' => 'tab'),
-        ),
-        ':input[name="menu[type]"]' => array('value' => 'default tab'),
-      ),
+    $form = [];
+    $form['bar']['#states'] = [
+      'visible' => [
+        [
+          ':input[name="menu[type]"]' => ['value' => 'normal'],
+        ],
+        [
+          ':input[name="menu[type]"]' => ['value' => 'tab'],
+        ],
+        ':input[name="menu[type]"]' => ['value' => 'default tab'],
+      ],
       // Example from https://www.drupal.org/node/1464758
-      'disabled' => array(
-        '[name="menu[options][dependee_1]"]' => array('value' => 'ON'),
-        array(
-          array('[name="menu[options][dependee_2]"]' => array('value' => 'ON')),
-          array('[name="menu[options][dependee_3]"]' => array('value' => 'ON')),
-        ),
-        array(
-          array('[name="menu[options][dependee_4]"]' => array('value' => 'ON')),
+      'disabled' => [
+        '[name="menu[options][dependee_1]"]' => ['value' => 'ON'],
+        [
+          ['[name="menu[options][dependee_2]"]' => ['value' => 'ON']],
+          ['[name="menu[options][dependee_3]"]' => ['value' => 'ON']],
+        ],
+        [
+          ['[name="menu[options][dependee_4]"]' => ['value' => 'ON']],
           'xor',
-          array('[name="menu[options][dependee_5]"]' => array('value' => 'ON')),
-        ),
-      ),
-    );
-    $expected['bar']['#states'] = array(
-      'visible' => array(
-        array(
-          ':input[name="options[type]"]' => array('value' => 'normal'),
-        ),
-        array(
-          ':input[name="options[type]"]' => array('value' => 'tab'),
-        ),
-        ':input[name="options[type]"]' => array('value' => 'default tab'),
-      ),
-      'disabled' => array(
-        '[name="options[options][dependee_1]"]' => array('value' => 'ON'),
-        array(
-          array('[name="options[options][dependee_2]"]' => array('value' => 'ON')),
-          array('[name="options[options][dependee_3]"]' => array('value' => 'ON')),
-        ),
-        array(
-          array('[name="options[options][dependee_4]"]' => array('value' => 'ON')),
+          ['[name="menu[options][dependee_5]"]' => ['value' => 'ON']],
+        ],
+      ],
+    ];
+    $expected['bar']['#states'] = [
+      'visible' => [
+        [
+          ':input[name="options[type]"]' => ['value' => 'normal'],
+        ],
+        [
+          ':input[name="options[type]"]' => ['value' => 'tab'],
+        ],
+        ':input[name="options[type]"]' => ['value' => 'default tab'],
+      ],
+      'disabled' => [
+        '[name="options[options][dependee_1]"]' => ['value' => 'ON'],
+        [
+          ['[name="options[options][dependee_2]"]' => ['value' => 'ON']],
+          ['[name="options[options][dependee_3]"]' => ['value' => 'ON']],
+        ],
+        [
+          ['[name="options[options][dependee_4]"]' => ['value' => 'ON']],
           'xor',
-          array('[name="options[options][dependee_5]"]' => array('value' => 'ON')),
-        ),
-      ),
-    );
+          ['[name="options[options][dependee_5]"]' => ['value' => 'ON']],
+        ],
+      ],
+    ];
     FormHelper::rewriteStatesSelector($form, 'menu', 'options');
     $this->assertSame($expected, $form, 'The #states selectors were properly rewritten.');
   }
diff --git a/core/tests/Drupal/Tests/Core/Form/FormStateTest.php b/core/tests/Drupal/Tests/Core/Form/FormStateTest.php
index 69118a8f77eee73e7e28bdd0084169600a0c9a03..0da2fe0de0ca29a96373afe0dbd9cb0d904a379a 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormStateTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormStateTest.php
@@ -41,17 +41,17 @@ public function testGetRedirect($form_state_additions, $expected) {
    *   Returns some test data.
    */
   public function providerTestGetRedirect() {
-    $data = array();
-    $data[] = array(array(), NULL);
+    $data = [];
+    $data[] = [[], NULL];
 
     $redirect = new RedirectResponse('/example');
-    $data[] = array(array('redirect' => $redirect), $redirect);
+    $data[] = [['redirect' => $redirect], $redirect];
 
-    $data[] = array(array('redirect' => new Url('test_route_b', array('key' => 'value'))), new Url('test_route_b', array('key' => 'value')));
+    $data[] = [['redirect' => new Url('test_route_b', ['key' => 'value'])], new Url('test_route_b', ['key' => 'value'])];
 
-    $data[] = array(array('programmed' => TRUE), NULL);
-    $data[] = array(array('rebuild' => TRUE), NULL);
-    $data[] = array(array('no_redirect' => TRUE), NULL);
+    $data[] = [['programmed' => TRUE], NULL];
+    $data[] = [['rebuild' => TRUE], NULL];
+    $data[] = [['no_redirect' => TRUE], NULL];
 
     return $data;
   }
@@ -63,7 +63,7 @@ public function providerTestGetRedirect() {
    */
   public function testSetError() {
     $form_state = new FormState();
-    $element['#parents'] = array('foo', 'bar');
+    $element['#parents'] = ['foo', 'bar'];
     $form_state->setError($element, 'Fail');
     $this->assertSame(['foo][bar' => 'Fail'], $form_state->getErrors());
   }
@@ -84,18 +84,18 @@ public function testGetError($errors, $parents, $error = NULL) {
   }
 
   public function providerTestGetError() {
-    return array(
-      array(array(), array('foo')),
-      array(array('foo][bar' => 'Fail'), array()),
-      array(array('foo][bar' => 'Fail'), array('foo')),
-      array(array('foo][bar' => 'Fail'), array('bar')),
-      array(array('foo][bar' => 'Fail'), array('baz')),
-      array(array('foo][bar' => 'Fail'), array('foo', 'bar'), 'Fail'),
-      array(array('foo][bar' => 'Fail'), array('foo', 'bar', 'baz'), 'Fail'),
-      array(array('foo][bar' => 'Fail 2'), array('foo')),
-      array(array('foo' => 'Fail 1', 'foo][bar' => 'Fail 2'), array('foo'), 'Fail 1'),
-      array(array('foo' => 'Fail 1', 'foo][bar' => 'Fail 2'), array('foo', 'bar'), 'Fail 1'),
-    );
+    return [
+      [[], ['foo']],
+      [['foo][bar' => 'Fail'], []],
+      [['foo][bar' => 'Fail'], ['foo']],
+      [['foo][bar' => 'Fail'], ['bar']],
+      [['foo][bar' => 'Fail'], ['baz']],
+      [['foo][bar' => 'Fail'], ['foo', 'bar'], 'Fail'],
+      [['foo][bar' => 'Fail'], ['foo', 'bar', 'baz'], 'Fail'],
+      [['foo][bar' => 'Fail 2'], ['foo']],
+      [['foo' => 'Fail 1', 'foo][bar' => 'Fail 2'], ['foo'], 'Fail 1'],
+      [['foo' => 'Fail 1', 'foo][bar' => 'Fail 2'], ['foo', 'bar'], 'Fail 1'],
+    ];
   }
 
   /**
@@ -117,15 +117,15 @@ public function testSetErrorByName($limit_validation_errors, $expected_errors) {
   }
 
   public function providerTestSetErrorByName() {
-    return array(
+    return [
       // Only validate the 'options' element.
-      array(array(array('options')), array('options' => '')),
+      [[['options']], ['options' => '']],
       // Do not limit an validation, and, ensuring the first error is returned
       // for the 'test' element.
       [NULL, ['test' => 'Fail 1', 'options' => '']],
       // Limit all validation.
-      array(array(), array()),
-    );
+      [[], []],
+    ];
   }
 
   /**
@@ -182,7 +182,7 @@ public function testLoadInclude() {
     $module = 'some_module';
     $name = 'some_name';
     $form_state = $this->getMockBuilder('Drupal\Core\Form\FormState')
-      ->setMethods(array('moduleLoadInclude'))
+      ->setMethods(['moduleLoadInclude'])
       ->getMock();
     $form_state->expects($this->once())
       ->method('moduleLoadInclude')
@@ -198,7 +198,7 @@ public function testLoadIncludeNoName() {
     $type = 'some_type';
     $module = 'some_module';
     $form_state = $this->getMockBuilder('Drupal\Core\Form\FormState')
-      ->setMethods(array('moduleLoadInclude'))
+      ->setMethods(['moduleLoadInclude'])
       ->getMock();
     $form_state->expects($this->once())
       ->method('moduleLoadInclude')
@@ -214,7 +214,7 @@ public function testLoadIncludeNotFound() {
     $type = 'some_type';
     $module = 'some_module';
     $form_state = $this->getMockBuilder('Drupal\Core\Form\FormState')
-      ->setMethods(array('moduleLoadInclude'))
+      ->setMethods(['moduleLoadInclude'])
       ->getMock();
     $form_state->expects($this->once())
       ->method('moduleLoadInclude')
@@ -231,7 +231,7 @@ public function testLoadIncludeAlreadyLoaded() {
     $module = 'some_module';
     $name = 'some_name';
     $form_state = $this->getMockBuilder('Drupal\Core\Form\FormState')
-      ->setMethods(array('moduleLoadInclude'))
+      ->setMethods(['moduleLoadInclude'])
       ->getMock();
 
     $form_state->addBuildInfo('files', [
@@ -376,9 +376,9 @@ public function testTemporaryValue() {
     $form_state->setTemporaryValue('rainbow_sparkles', 'yes please');
     $this->assertSame($form_state->getTemporaryValue('rainbow_sparkles'), 'yes please');
     $this->assertTrue($form_state->hasTemporaryValue('rainbow_sparkles'), TRUE);
-    $form_state->setTemporaryValue(array('rainbow_sparkles', 'magic_ponies'), 'yes please');
-    $this->assertSame($form_state->getTemporaryValue(array('rainbow_sparkles', 'magic_ponies')), 'yes please');
-    $this->assertTrue($form_state->hasTemporaryValue(array('rainbow_sparkles', 'magic_ponies')), TRUE);
+    $form_state->setTemporaryValue(['rainbow_sparkles', 'magic_ponies'], 'yes please');
+    $this->assertSame($form_state->getTemporaryValue(['rainbow_sparkles', 'magic_ponies']), 'yes please');
+    $this->assertTrue($form_state->hasTemporaryValue(['rainbow_sparkles', 'magic_ponies']), TRUE);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Form/FormSubmitterTest.php b/core/tests/Drupal/Tests/Core/Form/FormSubmitterTest.php
index 6c8a6ebe653fb5c047ed74fe405f88c3c4c1e39c..15df6f65e949a38f5048219837f443223f5dd2a9 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormSubmitterTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormSubmitterTest.php
@@ -46,7 +46,7 @@ protected function setUp() {
    */
   public function testHandleFormSubmissionNotSubmitted() {
     $form_submitter = $this->getFormSubmitter();
-    $form = array();
+    $form = [];
     $form_state = new FormState();
 
     $return = $form_submitter->doSubmitForm($form, $form_state);
@@ -59,7 +59,7 @@ public function testHandleFormSubmissionNotSubmitted() {
    */
   public function testHandleFormSubmissionNoRedirect() {
     $form_submitter = $this->getFormSubmitter();
-    $form = array();
+    $form = [];
     $form_state = (new FormState())
       ->setSubmitted()
       ->disableRedirect();
@@ -87,17 +87,17 @@ public function testHandleFormSubmissionWithResponses($class, $form_state_key) {
       ->setFormState([$form_state_key => $response]);
 
     $form_submitter = $this->getFormSubmitter();
-    $form = array();
+    $form = [];
     $return = $form_submitter->doSubmitForm($form, $form_state);
 
     $this->assertInstanceOf('Symfony\Component\HttpFoundation\Response', $return);
   }
 
   public function providerTestHandleFormSubmissionWithResponses() {
-    return array(
-      array('Symfony\Component\HttpFoundation\Response', 'response'),
-      array('Symfony\Component\HttpFoundation\RedirectResponse', 'redirect'),
-    );
+    return [
+      ['Symfony\Component\HttpFoundation\Response', 'response'],
+      ['Symfony\Component\HttpFoundation\RedirectResponse', 'redirect'],
+    ];
   }
 
   /**
@@ -138,10 +138,10 @@ public function testRedirectWithUrl(Url $redirect_value, $result, $status = 303)
     $form_submitter = $this->getFormSubmitter();
     $this->urlGenerator->expects($this->once())
       ->method('generateFromRoute')
-      ->will($this->returnValueMap(array(
-          array('test_route_a', array(), array('absolute' => TRUE), FALSE, 'test-route'),
-          array('test_route_b', array('key' => 'value'), array('absolute' => TRUE), FALSE, 'test-route/value'),
-        ))
+      ->will($this->returnValueMap([
+          ['test_route_a', [], ['absolute' => TRUE], FALSE, 'test-route'],
+          ['test_route_b', ['key' => 'value'], ['absolute' => TRUE], FALSE, 'test-route/value'],
+        ])
       );
 
     $form_state = $this->getMock('Drupal\Core\Form\FormStateInterface');
@@ -160,10 +160,10 @@ public function testRedirectWithUrl(Url $redirect_value, $result, $status = 303)
    *   Returns some test data.
    */
   public function providerTestRedirectWithUrl() {
-    return array(
-      array(new Url('test_route_a', array(), array('absolute' => TRUE)), 'test-route'),
-      array(new Url('test_route_b', array('key' => 'value'), array('absolute' => TRUE)), 'test-route/value'),
-    );
+    return [
+      [new Url('test_route_a', [], ['absolute' => TRUE]), 'test-route'],
+      [new Url('test_route_b', ['key' => 'value'], ['absolute' => TRUE]), 'test-route/value'],
+    ];
   }
 
   /**
@@ -223,11 +223,11 @@ public function testExecuteSubmitHandlers() {
       ->method('simple_string_submit')
       ->with($this->isType('array'), $this->isInstanceOf('Drupal\Core\Form\FormStateInterface'));
 
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $form_submitter->executeSubmitHandlers($form, $form_state);
 
-    $form['#submit'][] = array($mock, 'hash_submit');
+    $form['#submit'][] = [$mock, 'hash_submit'];
     $form_submitter->executeSubmitHandlers($form, $form_state);
 
     // $form_state submit handlers will supersede $form handlers.
@@ -248,8 +248,8 @@ protected function getFormSubmitter() {
     $request_stack = new RequestStack();
     $request_stack->push(Request::create('/test-path'));
     return $this->getMockBuilder('Drupal\Core\Form\FormSubmitter')
-      ->setConstructorArgs(array($request_stack, $this->urlGenerator))
-      ->setMethods(array('batchGet', 'drupalInstallationAttempted'))
+      ->setConstructorArgs([$request_stack, $this->urlGenerator])
+      ->setMethods(['batchGet', 'drupalInstallationAttempted'])
       ->getMock();
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Form/FormTestBase.php b/core/tests/Drupal/Tests/Core/Form/FormTestBase.php
index 078d30ed9c88c30a5fc2677ffce013f8be94c98e..ef08ab77e2c3fd8160cf895bec65fafa43e2db76 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormTestBase.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormTestBase.php
@@ -163,7 +163,7 @@ protected function setUp() {
       ->getMock();
     $this->elementInfo->expects($this->any())
       ->method('getInfo')
-      ->will($this->returnCallback(array($this, 'getInfo')));
+      ->will($this->returnCallback([$this, 'getInfo']));
 
     $this->csrfToken = $this->getMockBuilder('Drupal\Core\Access\CsrfTokenGenerator')
       ->disableOriginalConstructor()
@@ -184,8 +184,8 @@ protected function setUp() {
       ->setMethods(NULL)
       ->getMock();
     $this->formSubmitter = $this->getMockBuilder('Drupal\Core\Form\FormSubmitter')
-      ->setConstructorArgs(array($this->requestStack, $this->urlGenerator))
-      ->setMethods(array('batchGet', 'drupalInstallationAttempted'))
+      ->setConstructorArgs([$this->requestStack, $this->urlGenerator])
+      ->setMethods(['batchGet', 'drupalInstallationAttempted'])
       ->getMock();
     $this->root = dirname(dirname(substr(__DIR__, 0, -strlen(__NAMESPACE__))));
 
@@ -290,25 +290,25 @@ public function getInfo($type) {
     $types['hidden'] = [
       '#input' => TRUE,
     ];
-    $types['token'] = array(
+    $types['token'] = [
       '#input' => TRUE,
-    );
-    $types['value'] = array(
+    ];
+    $types['value'] = [
       '#input' => TRUE,
-    );
-    $types['radios'] = array(
+    ];
+    $types['radios'] = [
       '#input' => TRUE,
-    );
-    $types['textfield'] = array(
+    ];
+    $types['textfield'] = [
       '#input' => TRUE,
-    );
-    $types['submit'] = array(
+    ];
+    $types['submit'] = [
       '#input' => TRUE,
       '#name' => 'op',
       '#is_button' => TRUE,
-    );
+    ];
     if (!isset($types[$type])) {
-      $types[$type] = array();
+      $types[$type] = [];
     }
     return $types[$type];
   }
diff --git a/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php b/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
index e172e05fe2a9bfd00c23e5d093073522433cb841..18f0be287a0c9482e3206a2c3c0503e037093ae9 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
@@ -58,7 +58,7 @@ public function testValidationComplete() {
       ->setMethods(NULL)
       ->getMock();
 
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $this->assertFalse($form_state->isValidationComplete());
     $form_validator->validateForm('test_form_id', $form, $form_state);
@@ -73,12 +73,12 @@ public function testValidationComplete() {
   public function testPreventDuplicateValidation() {
     $form_validator = $this->getMockBuilder('Drupal\Core\Form\FormValidator')
       ->setConstructorArgs([new RequestStack(), $this->getStringTranslationStub(), $this->csrfToken, $this->logger, $this->formErrorHandler])
-      ->setMethods(array('doValidateForm'))
+      ->setMethods(['doValidateForm'])
       ->getMock();
     $form_validator->expects($this->never())
       ->method('doValidateForm');
 
-    $form = array();
+    $form = [];
     $form_state = (new FormState())
       ->setValidationComplete();
     $form_validator->validateForm('test_form_id', $form, $form_state);
@@ -93,14 +93,14 @@ public function testPreventDuplicateValidation() {
   public function testMustValidate() {
     $form_validator = $this->getMockBuilder('Drupal\Core\Form\FormValidator')
       ->setConstructorArgs([new RequestStack(), $this->getStringTranslationStub(), $this->csrfToken, $this->logger, $this->formErrorHandler])
-      ->setMethods(array('doValidateForm'))
+      ->setMethods(['doValidateForm'])
       ->getMock();
     $form_validator->expects($this->once())
       ->method('doValidateForm');
     $this->formErrorHandler->expects($this->once())
       ->method('handleFormErrors');
 
-    $form = array();
+    $form = [];
     $form_state = (new FormState())
       ->setValidationComplete()
       ->setValidationEnforced();
@@ -112,7 +112,7 @@ public function testMustValidate() {
    */
   public function testValidateInvalidFormToken() {
     $request_stack = new RequestStack();
-    $request = new Request(array(), array(), array(), array(), array(), array('REQUEST_URI' => '/test/example?foo=bar'));
+    $request = new Request([], [], [], [], [], ['REQUEST_URI' => '/test/example?foo=bar']);
     $request_stack->push($request);
     $this->csrfToken->expects($this->once())
       ->method('validate')
@@ -120,14 +120,14 @@ public function testValidateInvalidFormToken() {
 
     $form_validator = $this->getMockBuilder('Drupal\Core\Form\FormValidator')
       ->setConstructorArgs([$request_stack, $this->getStringTranslationStub(), $this->csrfToken, $this->logger, $this->formErrorHandler])
-      ->setMethods(array('doValidateForm'))
+      ->setMethods(['doValidateForm'])
       ->getMock();
     $form_validator->expects($this->never())
       ->method('doValidateForm');
 
     $form['#token'] = 'test_form_id';
     $form_state = $this->getMockBuilder('Drupal\Core\Form\FormState')
-      ->setMethods(array('setErrorByName'))
+      ->setMethods(['setErrorByName'])
       ->getMock();
     $form_state->expects($this->once())
       ->method('setErrorByName')
@@ -148,14 +148,14 @@ public function testValidateValidFormToken() {
 
     $form_validator = $this->getMockBuilder('Drupal\Core\Form\FormValidator')
       ->setConstructorArgs([$request_stack, $this->getStringTranslationStub(), $this->csrfToken, $this->logger, $this->formErrorHandler])
-      ->setMethods(array('doValidateForm'))
+      ->setMethods(['doValidateForm'])
       ->getMock();
     $form_validator->expects($this->once())
       ->method('doValidateForm');
 
     $form['#token'] = 'test_form_id';
     $form_state = $this->getMockBuilder('Drupal\Core\Form\FormState')
-      ->setMethods(array('setErrorByName'))
+      ->setMethods(['setErrorByName'])
       ->getMock();
     $form_state->expects($this->never())
       ->method('setErrorByName');
@@ -176,7 +176,7 @@ public function testHandleErrorsWithLimitedValidation($sections, $triggering_ele
       ->getMock();
 
     $triggering_element['#limit_validation_errors'] = $sections;
-    $form = array();
+    $form = [];
     $form_state = (new FormState())
       ->setValues($values)
       ->setTriggeringElement($triggering_element);
@@ -186,80 +186,80 @@ public function testHandleErrorsWithLimitedValidation($sections, $triggering_ele
   }
 
   public function providerTestHandleErrorsWithLimitedValidation() {
-    return array(
+    return [
       // Test with a non-existent section.
-      array(
-        array(array('test1'), array('test3')),
-        array(),
-        array(
+      [
+        [['test1'], ['test3']],
+        [],
+        [
           'test1' => 'foo',
           'test2' => 'bar',
-        ),
-        array(
+        ],
+        [
           'test1' => 'foo',
-        ),
-      ),
+        ],
+      ],
       // Test with buttons in a non-validated section.
-      array(
-        array(array('test1')),
-        array(
+      [
+        [['test1']],
+        [
           '#is_button' => TRUE,
           '#value' => 'baz',
           '#name' => 'op',
-          '#parents' => array('submit'),
-        ),
-        array(
+          '#parents' => ['submit'],
+        ],
+        [
           'test1' => 'foo',
           'test2' => 'bar',
           'op' => 'baz',
           'submit' => 'baz',
-        ),
-        array(
+        ],
+        [
           'test1' => 'foo',
           'submit' => 'baz',
           'op' => 'baz',
-        ),
-      ),
+        ],
+      ],
       // Test with a matching button #value and $form_state value.
-      array(
-        array(array('submit')),
-        array(
+      [
+        [['submit']],
+        [
           '#is_button' => TRUE,
           '#value' => 'baz',
           '#name' => 'op',
-          '#parents' => array('submit'),
-        ),
-        array(
+          '#parents' => ['submit'],
+        ],
+        [
           'test1' => 'foo',
           'test2' => 'bar',
           'op' => 'baz',
           'submit' => 'baz',
-        ),
-        array(
+        ],
+        [
           'submit' => 'baz',
           'op' => 'baz',
-        ),
-      ),
+        ],
+      ],
       // Test with a mismatched button #value and $form_state value.
-      array(
-        array(array('submit')),
-        array(
+      [
+        [['submit']],
+        [
           '#is_button' => TRUE,
           '#value' => 'bar',
           '#name' => 'op',
-          '#parents' => array('submit'),
-        ),
-        array(
+          '#parents' => ['submit'],
+        ],
+        [
           'test1' => 'foo',
           'test2' => 'bar',
           'op' => 'baz',
           'submit' => 'baz',
-        ),
-        array(
+        ],
+        [
           'submit' => 'baz',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
   /**
@@ -270,7 +270,7 @@ public function testExecuteValidateHandlers() {
       ->setConstructorArgs([new RequestStack(), $this->getStringTranslationStub(), $this->csrfToken, $this->logger, $this->formErrorHandler])
       ->setMethods(NULL)
       ->getMock();
-    $mock = $this->getMock('stdClass', array('validate_handler', 'hash_validate'));
+    $mock = $this->getMock('stdClass', ['validate_handler', 'hash_validate']);
     $mock->expects($this->once())
       ->method('validate_handler')
       ->with($this->isType('array'), $this->isInstanceOf('Drupal\Core\Form\FormStateInterface'));
@@ -278,11 +278,11 @@ public function testExecuteValidateHandlers() {
       ->method('hash_validate')
       ->with($this->isType('array'), $this->isInstanceOf('Drupal\Core\Form\FormStateInterface'));
 
-    $form = array();
+    $form = [];
     $form_state = new FormState();
     $form_validator->executeValidateHandlers($form, $form_state);
 
-    $form['#validate'][] = array($mock, 'hash_validate');
+    $form['#validate'][] = [$mock, 'hash_validate'];
     $form_validator->executeValidateHandlers($form, $form_state);
 
     // $form_state validate handlers will supersede $form handlers.
@@ -299,21 +299,21 @@ public function testExecuteValidateHandlers() {
   public function testRequiredErrorMessage($element, $expected_message) {
     $form_validator = $this->getMockBuilder('Drupal\Core\Form\FormValidator')
       ->setConstructorArgs([new RequestStack(), $this->getStringTranslationStub(), $this->csrfToken, $this->logger, $this->formErrorHandler])
-      ->setMethods(array('executeValidateHandlers'))
+      ->setMethods(['executeValidateHandlers'])
       ->getMock();
     $form_validator->expects($this->once())
       ->method('executeValidateHandlers');
 
-    $form = array();
-    $form['test'] = $element + array(
+    $form = [];
+    $form['test'] = $element + [
       '#type' => 'textfield',
       '#value' => '',
       '#needs_validation' => TRUE,
       '#required' => TRUE,
-      '#parents' => array('test'),
-    );
+      '#parents' => ['test'],
+    ];
     $form_state = $this->getMockBuilder('Drupal\Core\Form\FormState')
-      ->setMethods(array('setError'))
+      ->setMethods(['setError'])
       ->getMock();
     $form_state->expects($this->once())
       ->method('setError')
@@ -322,23 +322,23 @@ public function testRequiredErrorMessage($element, $expected_message) {
   }
 
   public function providerTestRequiredErrorMessage() {
-    return array(
-      array(
+    return [
+      [
         // Use the default message with a title.
-        array('#title' => 'Test'),
+        ['#title' => 'Test'],
         'Test field is required.',
-      ),
+      ],
       // Use a custom message.
-      array(
-        array('#required_error' => 'FAIL'),
+      [
+        ['#required_error' => 'FAIL'],
         'FAIL',
-      ),
+      ],
       // No title or custom message.
-      array(
-        array(),
+      [
+        [],
         '',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -347,22 +347,22 @@ public function providerTestRequiredErrorMessage() {
   public function testElementValidate() {
     $form_validator = $this->getMockBuilder('Drupal\Core\Form\FormValidator')
       ->setConstructorArgs([new RequestStack(), $this->getStringTranslationStub(), $this->csrfToken, $this->logger, $this->formErrorHandler])
-      ->setMethods(array('executeValidateHandlers'))
+      ->setMethods(['executeValidateHandlers'])
       ->getMock();
     $form_validator->expects($this->once())
       ->method('executeValidateHandlers');
-    $mock = $this->getMock('stdClass', array('element_validate'));
+    $mock = $this->getMock('stdClass', ['element_validate']);
     $mock->expects($this->once())
       ->method('element_validate')
       ->with($this->isType('array'), $this->isInstanceOf('Drupal\Core\Form\FormStateInterface'), NULL);
 
-    $form = array();
-    $form['test'] = array(
+    $form = [];
+    $form['test'] = [
       '#type' => 'textfield',
       '#title' => 'Test',
-      '#parents' => array('test'),
-      '#element_validate' => array(array($mock, 'element_validate')),
-    );
+      '#parents' => ['test'],
+      '#element_validate' => [[$mock, 'element_validate']],
+    ];
     $form_state = new FormState();
     $form_validator->validateForm('test_form_id', $form, $form_state);
   }
@@ -375,7 +375,7 @@ public function testElementValidate() {
   public function testPerformRequiredValidation($element, $expected_message, $call_watchdog) {
     $form_validator = $this->getMockBuilder('Drupal\Core\Form\FormValidator')
       ->setConstructorArgs([new RequestStack(), $this->getStringTranslationStub(), $this->csrfToken, $this->logger, $this->formErrorHandler])
-      ->setMethods(array('setError'))
+      ->setMethods(['setError'])
       ->getMock();
 
     if ($call_watchdog) {
@@ -384,15 +384,15 @@ public function testPerformRequiredValidation($element, $expected_message, $call
         ->with($this->isType('string'), $this->isType('array'));
     }
 
-    $form = array();
-    $form['test'] = $element + array(
+    $form = [];
+    $form['test'] = $element + [
       '#title' => 'Test',
       '#needs_validation' => TRUE,
       '#required' => FALSE,
-      '#parents' => array('test'),
-    );
+      '#parents' => ['test'],
+    ];
     $form_state = $this->getMockBuilder('Drupal\Core\Form\FormState')
-      ->setMethods(array('setError'))
+      ->setMethods(['setError'])
       ->getMock();
     $form_state->expects($this->once())
       ->method('setError')
@@ -401,71 +401,71 @@ public function testPerformRequiredValidation($element, $expected_message, $call
   }
 
   public function providerTestPerformRequiredValidation() {
-    return array(
-      array(
-        array(
+    return [
+      [
+        [
           '#type' => 'select',
-          '#options' => array(
+          '#options' => [
             'foo' => 'Foo',
             'bar' => 'Bar',
-          ),
+          ],
           '#required' => TRUE,
           '#value' => 'baz',
           '#empty_value' => 'baz',
           '#multiple' => FALSE,
-        ),
+        ],
         'Test field is required.',
         FALSE,
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           '#type' => 'select',
-          '#options' => array(
+          '#options' => [
             'foo' => 'Foo',
             'bar' => 'Bar',
-          ),
+          ],
           '#value' => 'baz',
           '#multiple' => FALSE,
-        ),
+        ],
         'An illegal choice has been detected. Please contact the site administrator.',
         TRUE,
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           '#type' => 'checkboxes',
-          '#options' => array(
+          '#options' => [
             'foo' => 'Foo',
             'bar' => 'Bar',
-          ),
-          '#value' => array('baz'),
+          ],
+          '#value' => ['baz'],
           '#multiple' => TRUE,
-        ),
+        ],
         'An illegal choice has been detected. Please contact the site administrator.',
         TRUE,
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           '#type' => 'select',
-          '#options' => array(
+          '#options' => [
             'foo' => 'Foo',
             'bar' => 'Bar',
-          ),
-          '#value' => array('baz'),
+          ],
+          '#value' => ['baz'],
           '#multiple' => TRUE,
-        ),
+        ],
         'An illegal choice has been detected. Please contact the site administrator.',
         TRUE,
-      ),
-      array(
-        array(
+      ],
+      [
+        [
           '#type' => 'textfield',
           '#maxlength' => 7,
           '#value' => $this->randomMachineName(8),
-        ),
+        ],
         'Test cannot be longer than <em class="placeholder">7</em> characters but is currently <em class="placeholder">8</em> characters long.',
         FALSE,
-      ),
-    );
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Form/OptGroupTest.php b/core/tests/Drupal/Tests/Core/Form/OptGroupTest.php
index 1d3a8fc0271ec670cf3d0a7b5f699f0e5d368b4d..b38f336709a6d848dcb766b3ee60ef9f2f854ef3 100644
--- a/core/tests/Drupal/Tests/Core/Form/OptGroupTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/OptGroupTest.php
@@ -17,7 +17,7 @@ class OptGroupTest extends UnitTestCase {
    * @dataProvider providerTestFlattenOptions
    */
   public function testFlattenOptions($options) {
-    $this->assertSame(array('foo' => 'foo'), OptGroup::flattenOptions($options));
+    $this->assertSame(['foo' => 'foo'], OptGroup::flattenOptions($options));
   }
 
   /**
@@ -27,18 +27,18 @@ public function testFlattenOptions($options) {
    */
   public function providerTestFlattenOptions() {
     $object1 = new \stdClass();
-    $object1->option = array('foo' => 'foo');
+    $object1->option = ['foo' => 'foo'];
     $object2 = new \stdClass();
-    $object2->option = array(array('foo' => 'foo'), array('foo' => 'foo'));
+    $object2->option = [['foo' => 'foo'], ['foo' => 'foo']];
     $object3 = new \stdClass();
-    return array(
-      array(array('foo' => 'foo')),
-      array(array(array('foo' => 'foo'))),
-      array(array($object1)),
-      array(array($object2)),
-      array(array($object1, $object2)),
-      array(array('foo' => $object3, $object1, array('foo' => 'foo'))),
-    );
+    return [
+      [['foo' => 'foo']],
+      [[['foo' => 'foo']]],
+      [[$object1]],
+      [[$object2]],
+      [[$object1, $object2]],
+      [['foo' => $object3, $object1, ['foo' => 'foo']]],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Form/fixtures/form_base_test.inc b/core/tests/Drupal/Tests/Core/Form/fixtures/form_base_test.inc
index cd833946f337a33f6dfac78a5e411d9cd2c9b6fa..b7623f768524ed45a7029920045bd5d6a169d6e8 100644
--- a/core/tests/Drupal/Tests/Core/Form/fixtures/form_base_test.inc
+++ b/core/tests/Drupal/Tests/Core/Form/fixtures/form_base_test.inc
@@ -12,27 +12,27 @@
  *   The form array
  */
 function test_form_id() {
-  $form['test'] = array(
+  $form['test'] = [
     '#type' => 'textfield',
     '#title' => 'Test',
-  );
-  $form['options'] = array(
+  ];
+  $form['options'] = [
     '#type' => 'radios',
-    '#options' => array(
+    '#options' => [
       'foo' => 'foo',
       'bar' => 'bar',
-    ),
-  );
-  $form['value'] = array(
+    ],
+  ];
+  $form['value'] = [
     '#type' => 'value',
     '#value' => 'bananas',
-  );
-  $form['actions'] = array(
+  ];
+  $form['actions'] = [
     '#type' => 'actions',
-  );
-  $form['actions']['submit'] = array(
+  ];
+  $form['actions']['submit'] = [
     '#type' => 'submit',
     '#value' => 'Submit',
-  );
+  ];
   return $form;
 }
diff --git a/core/tests/Drupal/Tests/Core/Image/ImageTest.php b/core/tests/Drupal/Tests/Core/Image/ImageTest.php
index 312bbdaf2e16a60ff4001a77d37f70e0ae36421a..6b35f8655cbffb0cd097ec6f9dedf545bed8fbcf 100644
--- a/core/tests/Drupal/Tests/Core/Image/ImageTest.php
+++ b/core/tests/Drupal/Tests/Core/Image/ImageTest.php
@@ -58,9 +58,9 @@ protected function setUp() {
    *
    * @return \PHPUnit_Framework_MockObject_MockObject
    */
-  protected function getToolkitMock(array $stubs = array()) {
+  protected function getToolkitMock(array $stubs = []) {
     $mock_builder = $this->getMockBuilder('Drupal\system\Plugin\ImageToolkit\GDToolkit');
-    $stubs = array_merge(array('getPluginId', 'save'), $stubs);
+    $stubs = array_merge(['getPluginId', 'save'], $stubs);
     return $mock_builder
       ->disableOriginalConstructor()
       ->setMethods($stubs)
@@ -81,8 +81,8 @@ protected function getToolkitOperationMock($class_name, ImageToolkitInterface $t
     $mock_builder = $this->getMockBuilder('Drupal\system\Plugin\ImageToolkit\Operation\gd\\' . $class_name);
     $logger = $this->getMock('Psr\Log\LoggerInterface');
     return $mock_builder
-      ->setMethods(array('execute'))
-      ->setConstructorArgs(array(array(), '', array(), $toolkit, $logger))
+      ->setMethods(['execute'])
+      ->setConstructorArgs([[], '', [], $toolkit, $logger])
       ->getMock();
   }
 
@@ -98,9 +98,9 @@ protected function getToolkitOperationMock($class_name, ImageToolkitInterface $t
    * @return \Drupal\Core\Image\Image
    *   An image object.
    */
-  protected function getTestImage($load_expected = TRUE, array $stubs = array()) {
+  protected function getTestImage($load_expected = TRUE, array $stubs = []) {
     if (!$load_expected && !in_array('load', $stubs)) {
-      $stubs = array_merge(array('load'), $stubs);
+      $stubs = array_merge(['load'], $stubs);
     }
 
     $this->toolkit = $this->getToolkitMock($stubs);
@@ -127,7 +127,7 @@ protected function getTestImage($load_expected = TRUE, array $stubs = array()) {
    *   An image object.
    */
   protected function getTestImageForOperation($class_name) {
-    $this->toolkit = $this->getToolkitMock(array('getToolkitOperation'));
+    $this->toolkit = $this->getToolkitMock(['getToolkitOperation']);
     $this->toolkitOperation = $this->getToolkitOperationMock($class_name, $this->toolkit);
 
     $this->toolkit->expects($this->any())
@@ -209,7 +209,7 @@ public function testSave() {
       ->method('save')
       ->will($this->returnValue(TRUE));
 
-    $image = $this->getMock('Drupal\Core\Image\Image', array('chmod'), array($toolkit, $this->image->getSource()));
+    $image = $this->getMock('Drupal\Core\Image\Image', ['chmod'], [$toolkit, $this->image->getSource()]);
     $image->expects($this->any())
       ->method('chmod')
       ->will($this->returnValue(TRUE));
@@ -241,7 +241,7 @@ public function testChmodFails() {
       ->method('save')
       ->will($this->returnValue(TRUE));
 
-    $image = $this->getMock('Drupal\Core\Image\Image', array('chmod'), array($toolkit, $this->image->getSource()));
+    $image = $this->getMock('Drupal\Core\Image\Image', ['chmod'], [$toolkit, $this->image->getSource()]);
     $image->expects($this->any())
       ->method('chmod')
       ->will($this->returnValue(FALSE));
diff --git a/core/tests/Drupal/Tests/Core/Language/LanguageUnitTest.php b/core/tests/Drupal/Tests/Core/Language/LanguageUnitTest.php
index eaaf5a3321d1080f4ebaa467ca92cdddd01697dd..aefcbb0c0e276aa896270378e779901c2f4b9a6b 100644
--- a/core/tests/Drupal/Tests/Core/Language/LanguageUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Language/LanguageUnitTest.php
@@ -19,7 +19,7 @@ public function testConstruct() {
     $name = $this->randomMachineName();
     $language_code = $this->randomMachineName(2);
     $uuid = $this->randomMachineName();
-    $language = new Language(array('id' => $language_code, 'name' => $name, 'uuid' => $uuid));
+    $language = new Language(['id' => $language_code, 'name' => $name, 'uuid' => $uuid]);
     // Test that nonexistent properties are not added to the language object.
     $this->assertTrue(property_exists($language, 'id'));
     $this->assertTrue(property_exists($language, 'name'));
@@ -32,7 +32,7 @@ public function testConstruct() {
   public function testGetName() {
     $name = $this->randomMachineName();
     $language_code = $this->randomMachineName(2);
-    $language = new Language(array('id' => $language_code, 'name' => $name));
+    $language = new Language(['id' => $language_code, 'name' => $name]);
     $this->assertSame($name, $language->getName());
   }
 
@@ -41,7 +41,7 @@ public function testGetName() {
    */
   public function testGetLangcode() {
     $language_code = $this->randomMachineName(2);
-    $language = new Language(array('id' => $language_code));
+    $language = new Language(['id' => $language_code]);
     $this->assertSame($language_code, $language->getId());
   }
 
@@ -50,7 +50,7 @@ public function testGetLangcode() {
    */
   public function testGetDirection() {
     $language_code = $this->randomMachineName(2);
-    $language = new Language(array('id' => $language_code, 'direction' => LanguageInterface::DIRECTION_RTL));
+    $language = new Language(['id' => $language_code, 'direction' => LanguageInterface::DIRECTION_RTL]);
     $this->assertSame(LanguageInterface::DIRECTION_RTL, $language->getDirection());
   }
 
@@ -66,14 +66,14 @@ public function testIsDefault() {
       ->will($this->returnValue($language_default));
     \Drupal::setContainer($container);
 
-    $language = new Language(array('id' => $this->randomMachineName(2)));
+    $language = new Language(['id' => $this->randomMachineName(2)]);
     // Set up the LanguageDefault to return different default languages on
     // consecutive calls.
     $language_default->expects($this->any())
       ->method('get')
       ->willReturnOnConsecutiveCalls(
         $language,
-        new Language(array('id' => $this->randomMachineName(2)))
+        new Language(['id' => $this->randomMachineName(2)])
       );
 
     $this->assertTrue($language->isDefault());
@@ -104,58 +104,58 @@ public function testSortArrayOfLanguages(array $languages, array $expected) {
    *   An array of test data.
    */
   public function providerTestSortArrayOfLanguages() {
-    $language9A = new Language(array('id' => 'dd', 'name' => 'A', 'weight' => 9));
-    $language10A = new Language(array('id' => 'ee', 'name' => 'A', 'weight' => 10));
-    $language10B = new Language(array('id' => 'ff', 'name' => 'B', 'weight' => 10));
+    $language9A = new Language(['id' => 'dd', 'name' => 'A', 'weight' => 9]);
+    $language10A = new Language(['id' => 'ee', 'name' => 'A', 'weight' => 10]);
+    $language10B = new Language(['id' => 'ff', 'name' => 'B', 'weight' => 10]);
 
-    return array(
+    return [
       // Set up data set #0, already ordered by weight.
-      array(
+      [
         // Set the data.
-        array(
+        [
           $language9A->getId() => $language9A,
           $language10B->getId() => $language10B,
-        ),
+        ],
         // Set the expected key order.
-        array(
+        [
           $language9A->getId(),
           $language10B->getId(),
-        ),
-      ),
+        ],
+      ],
       // Set up data set #1, out of order by weight.
-      array(
-        array(
+      [
+        [
           $language10B->getId() => $language10B,
           $language9A->getId() => $language9A,
-        ),
-        array(
+        ],
+        [
           $language9A->getId(),
           $language10B->getId(),
-        ),
-      ),
+        ],
+      ],
       // Set up data set #2, tied by weight, already ordered by name.
-      array(
-        array(
+      [
+        [
           $language10A->getId() => $language10A,
           $language10B->getId() => $language10B,
-        ),
-        array(
+        ],
+        [
           $language10A->getId(),
           $language10B->getId(),
-        ),
-      ),
+        ],
+      ],
       // Set up data set #3, tied by weight, out of order by name.
-      array(
-        array(
+      [
+        [
           $language10B->getId() => $language10B,
           $language10A->getId() => $language10A,
-        ),
-        array(
+        ],
+        [
           $language10A->getId(),
           $language10B->getId(),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php b/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
index 112abf13d007c7abe1073e5d7c8d0ab715bc749d..395517f51fa5bcf8008a0c224fa20b54e4dfb682 100644
--- a/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
+++ b/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
@@ -37,33 +37,33 @@ public function testParseMessagePlaceholders(array $value, array $expected) {
    * Data provider for testParseMessagePlaceholders().
    */
   public function providerTestParseMessagePlaceholders() {
-    return array(
+    return [
       // PSR3 only message.
-      array(
-        array('message' => 'User {username} created', 'context' => array('username' => 'Dries')),
-        array('message' => 'User @username created', 'context' => array('@username' => 'Dries')),
-      ),
+      [
+        ['message' => 'User {username} created', 'context' => ['username' => 'Dries']],
+        ['message' => 'User @username created', 'context' => ['@username' => 'Dries']],
+      ],
       // PSR3 style mixed in a format_string style message.
-      array(
-        array('message' => 'User {username} created @time', 'context' => array('username' => 'Dries', '@time' => 'now')),
-        array('message' => 'User @username created @time', 'context' => array('@username' => 'Dries', '@time' => 'now')),
-      ),
+      [
+        ['message' => 'User {username} created @time', 'context' => ['username' => 'Dries', '@time' => 'now']],
+        ['message' => 'User @username created @time', 'context' => ['@username' => 'Dries', '@time' => 'now']],
+      ],
       // format_string style message only.
-      array(
-        array('message' => 'User @username created', 'context' => array('@username' => 'Dries')),
-        array('message' => 'User @username created', 'context' => array('@username' => 'Dries')),
-      ),
+      [
+        ['message' => 'User @username created', 'context' => ['@username' => 'Dries']],
+        ['message' => 'User @username created', 'context' => ['@username' => 'Dries']],
+      ],
       // Message without placeholders but wildcard characters.
-      array(
-        array('message' => 'User W-\\};~{&! created @', 'context' => array('' => '')),
-        array('message' => 'User W-\\};~{&! created @', 'context' => array()),
-      ),
+      [
+        ['message' => 'User W-\\};~{&! created @', 'context' => ['' => '']],
+        ['message' => 'User W-\\};~{&! created @', 'context' => []],
+      ],
       // Message with double PSR3 style messages.
-      array(
-        array('message' => 'Test {with} two {encapsuled} strings', 'context' => array('with' => 'together', 'encapsuled' => 'awesome')),
-        array('message' => 'Test @with two @encapsuled strings', 'context' => array('@with' => 'together', '@encapsuled' => 'awesome')),
-      ),
-    );
+      [
+        ['message' => 'Test {with} two {encapsuled} strings', 'context' => ['with' => 'together', 'encapsuled' => 'awesome']],
+        ['message' => 'Test @with two @encapsuled strings', 'context' => ['@with' => 'together', '@encapsuled' => 'awesome']],
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php b/core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php
index 932edb727d3c18a0b00732962866798970da35bb..d2b283adb9b4eba5c8b2b83945189210269f80c0 100644
--- a/core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php
+++ b/core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php
@@ -113,35 +113,35 @@ public function providerTestLog() {
     $request_mock->headers = $this->getMock('Symfony\Component\HttpFoundation\ParameterBag');
 
     // No request or account.
-    $cases [] = array(
+    $cases [] = [
       function ($context) {
         return $context['channel'] == 'test' && empty($context['uid']) && empty($context['ip']);
       },
-    );
+    ];
     // With account but not request. Since the request is not available the
     // current user should not be used.
-    $cases [] = array(
+    $cases [] = [
       function ($context) {
         return $context['uid'] === 0 && empty($context['ip']);
       },
       NULL,
       $account_mock,
-    );
+    ];
     // With request but not account.
-    $cases [] = array(
+    $cases [] = [
       function ($context) {
         return $context['ip'] === '127.0.0.1' && empty($context['uid']);
       },
       $request_mock,
-    );
+    ];
     // Both request and account.
-    $cases [] = array(
+    $cases [] = [
       function ($context) {
         return $context['ip'] === '127.0.0.1' && $context['uid'] === 1;
       },
       $request_mock,
       $account_mock,
-    );
+    ];
     return $cases;
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Mail/MailManagerTest.php b/core/tests/Drupal/Tests/Core/Mail/MailManagerTest.php
index d802374f3696cb9ad72615d351635f541ccc9b01..9ba2fb52b70ce7877129a6fa2f6bab480b5324ed 100644
--- a/core/tests/Drupal/Tests/Core/Mail/MailManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Mail/MailManagerTest.php
@@ -66,16 +66,16 @@ class MailManagerTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $definitions = array(
-    'php_mail' => array(
+  protected $definitions = [
+    'php_mail' => [
       'id' => 'php_mail',
       'class' => 'Drupal\Core\Mail\Plugin\Mail\PhpMail',
-    ),
-    'test_mail_collector' => array(
+    ],
+    'test_mail_collector' => [
       'id' => 'test_mail_collector',
       'class' => 'Drupal\Core\Mail\Plugin\Mail\TestMailCollector',
-    ),
-  );
+    ],
+  ];
 
   /**
    * {@inheritdoc}
@@ -97,13 +97,13 @@ protected function setUp() {
   /**
    * Sets up the mail manager for testing.
    */
-  protected function setUpMailManager($interface = array()) {
+  protected function setUpMailManager($interface = []) {
     // Use the provided config for system.mail.interface settings.
-    $this->configFactory = $this->getConfigFactoryStub(array(
-      'system.mail' => array(
+    $this->configFactory = $this->getConfigFactoryStub([
+      'system.mail' => [
         'interface' => $interface,
-      ),
-    ));
+      ],
+    ]);
     $logger_factory = $this->getMock('\Drupal\Core\Logger\LoggerChannelFactoryInterface');
     $string_translation = $this->getStringTranslationStub();
     $this->renderer = $this->getMock(RendererInterface::class);
@@ -118,19 +118,19 @@ protected function setUpMailManager($interface = array()) {
    * @covers ::getInstance
    */
   public function testGetInstance() {
-    $interface = array(
+    $interface = [
       'default' => 'php_mail',
       'default' => 'test_mail_collector',
-    );
+    ];
     $this->setUpMailManager($interface);
 
     // Test that an unmatched message_id returns the default plugin instance.
-    $options = array('module' => 'foo', 'key' => 'bar');
+    $options = ['module' => 'foo', 'key' => 'bar'];
     $instance = $this->mailManager->getInstance($options);
     $this->assertInstanceOf('Drupal\Core\Mail\Plugin\Mail\PhpMail', $instance);
 
     // Test that a matching message_id returns the specified plugin instance.
-    $options = array('module' => 'example', 'key' => 'testkey');
+    $options = ['module' => 'example', 'key' => 'testkey'];
     $instance = $this->mailManager->getInstance($options);
     $this->assertInstanceOf('Drupal\Core\Mail\Plugin\Mail\TestMailCollector', $instance);
   }
@@ -142,10 +142,10 @@ public function testGetInstance() {
    * @covers ::mail
    */
   public function testMailInRenderContext() {
-    $interface = array(
+    $interface = [
       'default' => 'php_mail',
       'example_testkey' => 'test_mail_collector',
-    );
+    ];
     $this->setUpMailManager($interface);
 
     $this->renderer->expects($this->exactly(1))
@@ -176,9 +176,9 @@ public function setDiscovery(DiscoveryInterface $discovery) {
   /**
    * {@inheritdoc}
    */
-  public function doMail($module, $key, $to, $langcode, $params = array(), $reply = NULL, $send = TRUE) {
+  public function doMail($module, $key, $to, $langcode, $params = [], $reply = NULL, $send = TRUE) {
     // Build a simplified message array and return it.
-    $message = array(
+    $message = [
       'id' => $module . '_' . $key,
       'module' => $module,
       'key' => $key,
@@ -189,8 +189,8 @@ public function doMail($module, $key, $to, $langcode, $params = array(), $reply
       'params' => $params,
       'send' => TRUE,
       'subject' => '',
-      'body' => array(),
-    );
+      'body' => [],
+    ];
 
     return $message;
   }
diff --git a/core/tests/Drupal/Tests/Core/Menu/ContextualLinkDefaultTest.php b/core/tests/Drupal/Tests/Core/Menu/ContextualLinkDefaultTest.php
index 970997fc6286a58ff6ff3ab29278692fad01b974..a956d83467b248ac6359d4de6a56464e5cb97923 100644
--- a/core/tests/Drupal/Tests/Core/Menu/ContextualLinkDefaultTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/ContextualLinkDefaultTest.php
@@ -25,7 +25,7 @@ class ContextualLinkDefaultTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $config = array();
+  protected $config = [];
 
   /**
    * The used plugin ID.
@@ -39,9 +39,9 @@ class ContextualLinkDefaultTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $pluginDefinition = array(
+  protected $pluginDefinition = [
     'id' => 'contextual_link_default',
-  );
+  ];
 
   /**
    * The mocked translator.
@@ -80,7 +80,7 @@ public function testGetTitle() {
    */
   public function testGetTitleWithContext() {
     $title = 'Example';
-    $this->pluginDefinition['title'] = (new TranslatableMarkup($title, array(), array('context' => 'context'), $this->stringTranslation));
+    $this->pluginDefinition['title'] = (new TranslatableMarkup($title, [], ['context' => 'context'], $this->stringTranslation));
     $this->stringTranslation->expects($this->once())
       ->method('translateString')
       ->with($this->pluginDefinition['title'])
@@ -95,7 +95,7 @@ public function testGetTitleWithContext() {
    */
   public function testGetTitleWithTitleArguments() {
     $title = 'Example @test';
-    $this->pluginDefinition['title'] = (new TranslatableMarkup($title, array('@test' => 'value'), [], $this->stringTranslation));
+    $this->pluginDefinition['title'] = (new TranslatableMarkup($title, ['@test' => 'value'], [], $this->stringTranslation));
     $this->stringTranslation->expects($this->once())
       ->method('translateString')
       ->with($this->pluginDefinition['title'])
@@ -129,7 +129,7 @@ public function testGetGroup($group_name = 'test_group') {
   /**
    * @covers ::getOptions
    */
-  public function testGetOptions($options = array('key' => 'value')) {
+  public function testGetOptions($options = ['key' => 'value']) {
     $this->pluginDefinition['options'] = $options;
     $this->setupContextualLinkDefault();
 
diff --git a/core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php b/core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php
index db0657845a099cc7b2dca5053fa9b6c3ec0f7cda..92caa26d04e4c16d13c3aaa5aefbcc32087cda21 100644
--- a/core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php
@@ -112,7 +112,7 @@ protected function setUp() {
     $language_manager = $this->getMock('Drupal\Core\Language\LanguageManagerInterface');
     $language_manager->expects($this->any())
       ->method('getCurrentLanguage')
-      ->will($this->returnValue(new Language(array('id' => 'en'))));
+      ->will($this->returnValue(new Language(['id' => 'en'])));
 
     $request_stack = new RequestStack();
     $property = new \ReflectionProperty('Drupal\Core\Menu\ContextualLinkManager', 'requestStack');
@@ -132,26 +132,26 @@ protected function setUp() {
    * @see \Drupal\Core\Menu\ContextualLinkManager::getContextualLinkPluginsByGroup()
    */
   public function testGetContextualLinkPluginsByGroup() {
-    $definitions = array(
-      'test_plugin1' => array(
+    $definitions = [
+      'test_plugin1' => [
         'id' => 'test_plugin1',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'group' => 'group1',
         'route_name' => 'test_route',
-      ),
-      'test_plugin2' => array(
+      ],
+      'test_plugin2' => [
         'id' => 'test_plugin2',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'group' => 'group1',
         'route_name' => 'test_route2',
-      ),
-      'test_plugin3' => array(
+      ],
+      'test_plugin3' => [
         'id' => 'test_plugin3',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'group' => 'group2',
         'route_name' => 'test_router3',
-      ),
-    );
+      ],
+    ];
     $this->pluginDiscovery->expects($this->once())
       ->method('getDefinitions')
       ->will($this->returnValue($definitions));
@@ -161,35 +161,35 @@ public function testGetContextualLinkPluginsByGroup() {
     $this->assertEmpty($result);
 
     $result = $this->contextualLinkManager->getContextualLinkPluginsByGroup('group1');
-    $this->assertEquals(array('test_plugin1', 'test_plugin2'), array_keys($result));
+    $this->assertEquals(['test_plugin1', 'test_plugin2'], array_keys($result));
 
     $result = $this->contextualLinkManager->getContextualLinkPluginsByGroup('group2');
-    $this->assertEquals(array('test_plugin3'), array_keys($result));
+    $this->assertEquals(['test_plugin3'], array_keys($result));
   }
 
   /**
    * Tests the getContextualLinkPluginsByGroup method with a prefilled cache.
    */
   public function testGetContextualLinkPluginsByGroupWithCache() {
-    $definitions = array(
-      'test_plugin1' => array(
+    $definitions = [
+      'test_plugin1' => [
         'id' => 'test_plugin1',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'group' => 'group1',
         'route_name' => 'test_route',
-      ),
-      'test_plugin2' => array(
+      ],
+      'test_plugin2' => [
         'id' => 'test_plugin2',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'group' => 'group1',
         'route_name' => 'test_route2',
-      ),
-    );
+      ],
+    ];
 
     $this->cacheBackend->expects($this->once())
       ->method('get')
       ->with('contextual_links_plugins:en:group1')
-      ->will($this->returnValue((object) array('data' => $definitions)));
+      ->will($this->returnValue((object) ['data' => $definitions]));
 
     $result = $this->contextualLinkManager->getContextualLinkPluginsByGroup('group1');
     $this->assertEquals($definitions, $result);
@@ -208,11 +208,11 @@ public function testGetContextualLinkPluginsByGroupWithCache() {
    * @expectedException \Drupal\Component\Plugin\Exception\PluginException
    */
   public function testProcessDefinitionWithoutRoute() {
-    $definition = array(
+    $definition = [
       'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
       'group' => 'example',
       'id' => 'test_plugin',
-    );
+    ];
     $this->contextualLinkManager->processDefinition($definition, 'test_plugin');
   }
 
@@ -224,11 +224,11 @@ public function testProcessDefinitionWithoutRoute() {
    * @expectedException \Drupal\Component\Plugin\Exception\PluginException
    */
   public function testProcessDefinitionWithoutGroup() {
-    $definition = array(
+    $definition = [
       'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
       'route_name' => 'example',
       'id' => 'test_plugin',
-    );
+    ];
     $this->contextualLinkManager->processDefinition($definition, 'test_plugin');
   }
 
@@ -238,35 +238,35 @@ public function testProcessDefinitionWithoutGroup() {
    * @see \Drupal\Core\Menu\ContextualLinkManager::getContextualLinksArrayByGroup()
    */
   public function testGetContextualLinksArrayByGroup() {
-    $definitions = array(
-      'test_plugin1' => array(
+    $definitions = [
+      'test_plugin1' => [
         'id' => 'test_plugin1',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'title' => 'Plugin 1',
         'weight' => 0,
         'group' => 'group1',
         'route_name' => 'test_route',
-        'options' => array(),
-      ),
-      'test_plugin2' => array(
+        'options' => [],
+      ],
+      'test_plugin2' => [
         'id' => 'test_plugin2',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'title' => 'Plugin 2',
         'weight' => 2,
         'group' => 'group1',
         'route_name' => 'test_route2',
-        'options' => array('key' => 'value'),
-      ),
-      'test_plugin3' => array(
+        'options' => ['key' => 'value'],
+      ],
+      'test_plugin3' => [
         'id' => 'test_plugin3',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'title' => 'Plugin 3',
         'weight' => 5,
         'group' => 'group2',
         'route_name' => 'test_router3',
-        'options' => array(),
-      ),
-    );
+        'options' => [],
+      ],
+    ];
 
     $this->pluginDiscovery->expects($this->once())
       ->method('getDefinitions')
@@ -277,7 +277,7 @@ public function testGetContextualLinksArrayByGroup() {
       ->will($this->returnValue(AccessResult::allowed()));
 
     // Set up mocking of the plugin factory.
-    $map = array();
+    $map = [];
     foreach ($definitions as $plugin_id => $definition) {
       $plugin = $this->getMock('Drupal\Core\Menu\ContextualLinkInterface');
       $plugin->expects($this->any())
@@ -292,7 +292,7 @@ public function testGetContextualLinksArrayByGroup() {
       $plugin->expects($this->any())
         ->method('getOptions')
         ->will($this->returnValue($definition['options']));
-      $map[] = array($plugin_id, array(), $plugin);
+      $map[] = [$plugin_id, [], $plugin];
     }
     $this->factory->expects($this->any())
       ->method('createInstance')
@@ -300,11 +300,11 @@ public function testGetContextualLinksArrayByGroup() {
 
     $this->moduleHandler->expects($this->at(1))
       ->method('alter')
-      ->with($this->equalTo('contextual_links'), new \PHPUnit_Framework_Constraint_Count(2), $this->equalTo('group1'), $this->equalTo(array('key' => 'value')));
+      ->with($this->equalTo('contextual_links'), new \PHPUnit_Framework_Constraint_Count(2), $this->equalTo('group1'), $this->equalTo(['key' => 'value']));
 
-    $result = $this->contextualLinkManager->getContextualLinksArrayByGroup('group1', array('key' => 'value'));
+    $result = $this->contextualLinkManager->getContextualLinksArrayByGroup('group1', ['key' => 'value']);
     $this->assertCount(2, $result);
-    foreach (array('test_plugin1', 'test_plugin2') as $plugin_id) {
+    foreach (['test_plugin1', 'test_plugin2'] as $plugin_id) {
       $definition = $definitions[$plugin_id];
       $this->assertEquals($definition['weight'], $result[$plugin_id]['weight']);
       $this->assertEquals($definition['title'], $result[$plugin_id]['title']);
@@ -318,26 +318,26 @@ public function testGetContextualLinksArrayByGroup() {
    * @see \Drupal\Core\Menu\ContextualLinkManager::getContextualLinksArrayByGroup()
    */
   public function testGetContextualLinksArrayByGroupAccessCheck() {
-    $definitions = array(
-      'test_plugin1' => array(
+    $definitions = [
+      'test_plugin1' => [
         'id' => 'test_plugin1',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'title' => 'Plugin 1',
         'weight' => 0,
         'group' => 'group1',
         'route_name' => 'test_route',
-        'options' => array(),
-      ),
-      'test_plugin2' => array(
+        'options' => [],
+      ],
+      'test_plugin2' => [
         'id' => 'test_plugin2',
         'class' => '\Drupal\Core\Menu\ContextualLinkDefault',
         'title' => 'Plugin 2',
         'weight' => 2,
         'group' => 'group1',
         'route_name' => 'test_route2',
-        'options' => array('key' => 'value'),
-      ),
-    );
+        'options' => ['key' => 'value'],
+      ],
+    ];
 
     $this->pluginDiscovery->expects($this->once())
       ->method('getDefinitions')
@@ -345,13 +345,13 @@ public function testGetContextualLinksArrayByGroupAccessCheck() {
 
     $this->accessManager->expects($this->any())
       ->method('checkNamedRoute')
-      ->will($this->returnValueMap(array(
-        array('test_route', array('key' => 'value'), $this->account, FALSE, TRUE),
-        array('test_route2', array('key' => 'value'), $this->account, FALSE, FALSE),
-      )));
+      ->will($this->returnValueMap([
+        ['test_route', ['key' => 'value'], $this->account, FALSE, TRUE],
+        ['test_route2', ['key' => 'value'], $this->account, FALSE, FALSE],
+      ]));
 
     // Set up mocking of the plugin factory.
-    $map = array();
+    $map = [];
     foreach ($definitions as $plugin_id => $definition) {
       $plugin = $this->getMock('Drupal\Core\Menu\ContextualLinkInterface');
       $plugin->expects($this->any())
@@ -366,13 +366,13 @@ public function testGetContextualLinksArrayByGroupAccessCheck() {
       $plugin->expects($this->any())
         ->method('getOptions')
         ->will($this->returnValue($definition['options']));
-      $map[] = array($plugin_id, array(), $plugin);
+      $map[] = [$plugin_id, [], $plugin];
     }
     $this->factory->expects($this->any())
       ->method('createInstance')
       ->will($this->returnValueMap($map));
 
-    $result = $this->contextualLinkManager->getContextualLinksArrayByGroup('group1', array('key' => 'value'));
+    $result = $this->contextualLinkManager->getContextualLinksArrayByGroup('group1', ['key' => 'value']);
 
     // Ensure that access checking was respected.
     $this->assertTrue(isset($result['test_plugin1']));
@@ -383,15 +383,15 @@ public function testGetContextualLinksArrayByGroupAccessCheck() {
    * Tests the plugins alter hook.
    */
   public function testPluginDefinitionAlter() {
-    $definitions['test_plugin'] = array(
+    $definitions['test_plugin'] = [
       'id' => 'test_plugin',
       'class' => ContextualLinkDefault::class,
       'title' => 'Plugin',
       'weight' => 2,
       'group' => 'group1',
       'route_name' => 'test_route',
-      'options' => array('key' => 'value'),
-    );
+      'options' => ['key' => 'value'],
+    ];
 
     $this->pluginDiscovery->expects($this->once())
       ->method('getDefinitions')
diff --git a/core/tests/Drupal/Tests/Core/Menu/DefaultMenuLinkTreeManipulatorsTest.php b/core/tests/Drupal/Tests/Core/Menu/DefaultMenuLinkTreeManipulatorsTest.php
index cab6d78e1f320bea1eb68cf294a516b4f5f1fb86..beb78287f6c34119dc44e3a176b878510f11f73c 100644
--- a/core/tests/Drupal/Tests/Core/Menu/DefaultMenuLinkTreeManipulatorsTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/DefaultMenuLinkTreeManipulatorsTest.php
@@ -54,14 +54,14 @@ class DefaultMenuLinkTreeManipulatorsTest extends UnitTestCase {
    *
    * @var \Drupal\Core\Menu\MenuLinkTreeElement[]
    */
-  protected $originalTree = array();
+  protected $originalTree = [];
 
   /**
    * Array of menu link instances
    *
    * @var \Drupal\Core\Menu\MenuLinkInterface[]
    */
-  protected $links = array();
+  protected $links = [];
 
   /**
    * {@inheritdoc}
@@ -103,30 +103,30 @@ protected function setUp() {
    * With link 6 being the only external link.
    */
   protected function mockTree() {
-    $this->links = array(
-      1 => MenuLinkMock::create(array('id' => 'test.example1', 'route_name' => 'example1', 'title' => 'foo', 'parent' => '')),
-      2 => MenuLinkMock::create(array('id' => 'test.example2', 'route_name' => 'example2', 'title' => 'bar', 'parent' => 'test.example1', 'route_parameters' => array('foo' => 'bar'))),
-      3 => MenuLinkMock::create(array('id' => 'test.example3', 'route_name' => 'example3', 'title' => 'baz', 'parent' => 'test.example2', 'route_parameters' => array('baz' => 'qux'))),
-      4 => MenuLinkMock::create(array('id' => 'test.example4', 'route_name' => 'example4', 'title' => 'qux', 'parent' => 'test.example3')),
-      5 => MenuLinkMock::create(array('id' => 'test.example5', 'route_name' => 'example5', 'title' => 'foofoo', 'parent' => '')),
-      6 => MenuLinkMock::create(array('id' => 'test.example6', 'route_name' => '', 'url' => 'https://www.drupal.org/', 'title' => 'barbar', 'parent' => '')),
-      7 => MenuLinkMock::create(array('id' => 'test.example7', 'route_name' => 'example7', 'title' => 'bazbaz', 'parent' => '')),
-      8 => MenuLinkMock::create(array('id' => 'test.example8', 'route_name' => 'example8', 'title' => 'quxqux', 'parent' => '')),
-      9 => DynamicMenuLinkMock::create(array('id' => 'test.example9', 'parent' => ''))->setCurrentUser($this->currentUser),
-    );
-    $this->originalTree = array();
-    $this->originalTree[1] = new MenuLinkTreeElement($this->links[1], FALSE, 1, FALSE, array());
-    $this->originalTree[2] = new MenuLinkTreeElement($this->links[2], TRUE, 1, FALSE, array(
-      3 => new MenuLinkTreeElement($this->links[3], TRUE, 2, FALSE, array(
-        4 => new MenuLinkTreeElement($this->links[4], FALSE, 3, FALSE, array()),
-      )),
-    ));
-    $this->originalTree[5] = new MenuLinkTreeElement($this->links[5], TRUE, 1, FALSE, array(
-      7 => new MenuLinkTreeElement($this->links[7], FALSE, 2, FALSE, array()),
-    ));
-    $this->originalTree[6] = new MenuLinkTreeElement($this->links[6], FALSE, 1, FALSE, array());
-    $this->originalTree[8] = new MenuLinkTreeElement($this->links[8], FALSE, 1, FALSE, array());
-    $this->originalTree[9] = new MenuLinkTreeElement($this->links[9], FALSE, 1, FALSE, array());
+    $this->links = [
+      1 => MenuLinkMock::create(['id' => 'test.example1', 'route_name' => 'example1', 'title' => 'foo', 'parent' => '']),
+      2 => MenuLinkMock::create(['id' => 'test.example2', 'route_name' => 'example2', 'title' => 'bar', 'parent' => 'test.example1', 'route_parameters' => ['foo' => 'bar']]),
+      3 => MenuLinkMock::create(['id' => 'test.example3', 'route_name' => 'example3', 'title' => 'baz', 'parent' => 'test.example2', 'route_parameters' => ['baz' => 'qux']]),
+      4 => MenuLinkMock::create(['id' => 'test.example4', 'route_name' => 'example4', 'title' => 'qux', 'parent' => 'test.example3']),
+      5 => MenuLinkMock::create(['id' => 'test.example5', 'route_name' => 'example5', 'title' => 'foofoo', 'parent' => '']),
+      6 => MenuLinkMock::create(['id' => 'test.example6', 'route_name' => '', 'url' => 'https://www.drupal.org/', 'title' => 'barbar', 'parent' => '']),
+      7 => MenuLinkMock::create(['id' => 'test.example7', 'route_name' => 'example7', 'title' => 'bazbaz', 'parent' => '']),
+      8 => MenuLinkMock::create(['id' => 'test.example8', 'route_name' => 'example8', 'title' => 'quxqux', 'parent' => '']),
+      9 => DynamicMenuLinkMock::create(['id' => 'test.example9', 'parent' => ''])->setCurrentUser($this->currentUser),
+    ];
+    $this->originalTree = [];
+    $this->originalTree[1] = new MenuLinkTreeElement($this->links[1], FALSE, 1, FALSE, []);
+    $this->originalTree[2] = new MenuLinkTreeElement($this->links[2], TRUE, 1, FALSE, [
+      3 => new MenuLinkTreeElement($this->links[3], TRUE, 2, FALSE, [
+        4 => new MenuLinkTreeElement($this->links[4], FALSE, 3, FALSE, []),
+      ]),
+    ]);
+    $this->originalTree[5] = new MenuLinkTreeElement($this->links[5], TRUE, 1, FALSE, [
+      7 => new MenuLinkTreeElement($this->links[7], FALSE, 2, FALSE, []),
+    ]);
+    $this->originalTree[6] = new MenuLinkTreeElement($this->links[6], FALSE, 1, FALSE, []);
+    $this->originalTree[8] = new MenuLinkTreeElement($this->links[8], FALSE, 1, FALSE, []);
+    $this->originalTree[9] = new MenuLinkTreeElement($this->links[9], FALSE, 1, FALSE, []);
   }
 
   /**
@@ -165,13 +165,13 @@ public function testCheckAccess() {
     // calls will be made.
     $this->accessManager->expects($this->exactly(5))
       ->method('checkNamedRoute')
-      ->will($this->returnValueMap(array(
-        array('example1', array(), $this->currentUser, TRUE, AccessResult::forbidden()),
-        array('example2', array('foo' => 'bar'), $this->currentUser, TRUE, AccessResult::allowed()->cachePerPermissions()),
-        array('example3', array('baz' => 'qux'), $this->currentUser, TRUE, AccessResult::neutral()),
-        array('example5', array(), $this->currentUser, TRUE, AccessResult::allowed()),
-        array('user.logout', array(), $this->currentUser, TRUE, AccessResult::allowed()),
-      )));
+      ->will($this->returnValueMap([
+        ['example1', [], $this->currentUser, TRUE, AccessResult::forbidden()],
+        ['example2', ['foo' => 'bar'], $this->currentUser, TRUE, AccessResult::allowed()->cachePerPermissions()],
+        ['example3', ['baz' => 'qux'], $this->currentUser, TRUE, AccessResult::neutral()],
+        ['example5', [], $this->currentUser, TRUE, AccessResult::allowed()],
+        ['user.logout', [], $this->currentUser, TRUE, AccessResult::allowed()],
+      ]));
 
     $this->mockTree();
     $this->originalTree[5]->subtree[7]->access = AccessResult::neutral();
@@ -259,8 +259,8 @@ public function testCheckAccessWithLinkToAnyPagePermission() {
   public function testFlatten() {
     $this->mockTree();
     $tree = $this->defaultMenuTreeManipulators->flatten($this->originalTree);
-    $this->assertEquals(array(1, 2, 5, 6, 8, 9), array_keys($this->originalTree));
-    $this->assertEquals(array(1, 2, 5, 6, 8, 9, 3, 4, 7), array_keys($tree));
+    $this->assertEquals([1, 2, 5, 6, 8, 9], array_keys($this->originalTree));
+    $this->assertEquals([1, 2, 5, 6, 8, 9, 3, 4, 7], array_keys($tree));
   }
 
   /**
@@ -271,35 +271,35 @@ public function testFlatten() {
    * @covers ::checkAccess
    */
   public function testCheckNodeAccess() {
-    $links = array(
-      1 => MenuLinkMock::create(array('id' => 'node.1', 'route_name' => 'entity.node.canonical', 'title' => 'foo', 'parent' => '', 'route_parameters' => array('node' => 1))),
-      2 => MenuLinkMock::create(array('id' => 'node.2', 'route_name' => 'entity.node.canonical', 'title' => 'bar', 'parent' => '', 'route_parameters' => array('node' => 2))),
-      3 => MenuLinkMock::create(array('id' => 'node.3', 'route_name' => 'entity.node.canonical', 'title' => 'baz', 'parent' => 'node.2', 'route_parameters' => array('node' => 3))),
-      4 => MenuLinkMock::create(array('id' => 'node.4', 'route_name' => 'entity.node.canonical', 'title' => 'qux', 'parent' => 'node.3', 'route_parameters' => array('node' => 4))),
-      5 => MenuLinkMock::create(array('id' => 'test.1', 'route_name' => 'test_route', 'title' => 'qux', 'parent' => '')),
-      6 => MenuLinkMock::create(array('id' => 'test.2', 'route_name' => 'test_route', 'title' => 'qux', 'parent' => 'test.1')),
-    );
-    $tree = array();
-    $tree[1] = new MenuLinkTreeElement($links[1], FALSE, 1, FALSE, array());
-    $tree[2] = new MenuLinkTreeElement($links[2], TRUE, 1, FALSE, array(
-      3 => new MenuLinkTreeElement($links[3], TRUE, 2, FALSE, array(
-        4 => new MenuLinkTreeElement($links[4], FALSE, 3, FALSE, array()),
-      )),
-    ));
-    $tree[5] = new MenuLinkTreeElement($links[5], TRUE, 1, FALSE, array(
-      6 => new MenuLinkTreeElement($links[6], FALSE, 2, FALSE, array()),
-    ));
+    $links = [
+      1 => MenuLinkMock::create(['id' => 'node.1', 'route_name' => 'entity.node.canonical', 'title' => 'foo', 'parent' => '', 'route_parameters' => ['node' => 1]]),
+      2 => MenuLinkMock::create(['id' => 'node.2', 'route_name' => 'entity.node.canonical', 'title' => 'bar', 'parent' => '', 'route_parameters' => ['node' => 2]]),
+      3 => MenuLinkMock::create(['id' => 'node.3', 'route_name' => 'entity.node.canonical', 'title' => 'baz', 'parent' => 'node.2', 'route_parameters' => ['node' => 3]]),
+      4 => MenuLinkMock::create(['id' => 'node.4', 'route_name' => 'entity.node.canonical', 'title' => 'qux', 'parent' => 'node.3', 'route_parameters' => ['node' => 4]]),
+      5 => MenuLinkMock::create(['id' => 'test.1', 'route_name' => 'test_route', 'title' => 'qux', 'parent' => '']),
+      6 => MenuLinkMock::create(['id' => 'test.2', 'route_name' => 'test_route', 'title' => 'qux', 'parent' => 'test.1']),
+    ];
+    $tree = [];
+    $tree[1] = new MenuLinkTreeElement($links[1], FALSE, 1, FALSE, []);
+    $tree[2] = new MenuLinkTreeElement($links[2], TRUE, 1, FALSE, [
+      3 => new MenuLinkTreeElement($links[3], TRUE, 2, FALSE, [
+        4 => new MenuLinkTreeElement($links[4], FALSE, 3, FALSE, []),
+      ]),
+    ]);
+    $tree[5] = new MenuLinkTreeElement($links[5], TRUE, 1, FALSE, [
+      6 => new MenuLinkTreeElement($links[6], FALSE, 2, FALSE, []),
+    ]);
 
     $query = $this->getMock('Drupal\Core\Entity\Query\QueryInterface');
     $query->expects($this->at(0))
       ->method('condition')
-      ->with('nid', array(1, 2, 3, 4));
+      ->with('nid', [1, 2, 3, 4]);
     $query->expects($this->at(1))
       ->method('condition')
       ->with('status', NodeInterface::PUBLISHED);
     $query->expects($this->once())
       ->method('execute')
-      ->willReturn(array(1, 2, 4));
+      ->willReturn([1, 2, 4]);
     $storage = $this->getMock(EntityStorageInterface::class);
     $storage->expects($this->once())
       ->method('getQuery')
diff --git a/core/tests/Drupal/Tests/Core/Menu/LocalActionDefaultTest.php b/core/tests/Drupal/Tests/Core/Menu/LocalActionDefaultTest.php
index 2f0c1a8d7392a2e49673e47f51683040a355d15d..b026fb0624c5622f4bff7598daa4d5198263f723 100644
--- a/core/tests/Drupal/Tests/Core/Menu/LocalActionDefaultTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalActionDefaultTest.php
@@ -25,7 +25,7 @@ class LocalActionDefaultTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $config = array();
+  protected $config = [];
 
   /**
    * The used plugin ID.
@@ -39,9 +39,9 @@ class LocalActionDefaultTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $pluginDefinition = array(
+  protected $pluginDefinition = [
     'id' => 'local_action_default',
-  );
+  ];
 
   /**
    * The mocked translator.
@@ -93,7 +93,7 @@ public function testGetTitle() {
    * @see \Drupal\Core\Menu\LocalTaskDefault::getTitle()
    */
   public function testGetTitleWithContext() {
-    $this->pluginDefinition['title'] = (new TranslatableMarkup('Example', array(), array('context' => 'context'), $this->stringTranslation));
+    $this->pluginDefinition['title'] = (new TranslatableMarkup('Example', [], ['context' => 'context'], $this->stringTranslation));
     $this->stringTranslation->expects($this->once())
       ->method('translateString')
       ->with($this->pluginDefinition['title'])
@@ -107,7 +107,7 @@ public function testGetTitleWithContext() {
    * Tests the getTitle method with title arguments.
    */
   public function testGetTitleWithTitleArguments() {
-    $this->pluginDefinition['title'] = (new TranslatableMarkup('Example @test', array('@test' => 'value'), [], $this->stringTranslation));
+    $this->pluginDefinition['title'] = (new TranslatableMarkup('Example @test', ['@test' => 'value'], [], $this->stringTranslation));
     $this->stringTranslation->expects($this->once())
       ->method('translateString')
       ->with($this->pluginDefinition['title'])
diff --git a/core/tests/Drupal/Tests/Core/Menu/LocalActionManagerTest.php b/core/tests/Drupal/Tests/Core/Menu/LocalActionManagerTest.php
index 92ce48e338715630f4194e4d6ac297d20fea2c0b..0f1f848c924949077c42a32ed74477991eaf9926 100644
--- a/core/tests/Drupal/Tests/Core/Menu/LocalActionManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalActionManagerTest.php
@@ -134,8 +134,8 @@ public function testGetTitle() {
 
     $this->controllerResolver->expects($this->once())
       ->method('getArguments')
-      ->with($this->request, array($local_action, 'getTitle'))
-      ->will($this->returnValue(array('test')));
+      ->with($this->request, [$local_action, 'getTitle'])
+      ->will($this->returnValue(['test']));
 
     $this->localActionManager->getTitle($local_action);
   }
@@ -149,7 +149,7 @@ public function testGetActionsForRoute($route_appears, array $plugin_definitions
     $this->discovery->expects($this->any())
       ->method('getDefinitions')
       ->will($this->returnValue($plugin_definitions));
-    $map = array();
+    $map = [];
     foreach ($plugin_definitions as $plugin_id => $plugin_definition) {
       $plugin = $this->getMock('Drupal\Core\Menu\LocalActionInterface');
       $plugin->expects($this->any())
@@ -157,23 +157,23 @@ public function testGetActionsForRoute($route_appears, array $plugin_definitions
         ->will($this->returnValue($plugin_definition['route_name']));
       $plugin->expects($this->any())
         ->method('getRouteParameters')
-        ->will($this->returnValue(isset($plugin_definition['route_parameters']) ? $plugin_definition['route_parameters'] : array()));
+        ->will($this->returnValue(isset($plugin_definition['route_parameters']) ? $plugin_definition['route_parameters'] : []));
       $plugin->expects($this->any())
         ->method('getTitle')
         ->will($this->returnValue($plugin_definition['title']));
       $this->controllerResolver->expects($this->any())
         ->method('getArguments')
-        ->with($this->request, array($plugin, 'getTitle'))
-        ->will($this->returnValue(array()));
+        ->with($this->request, [$plugin, 'getTitle'])
+        ->will($this->returnValue([]));
 
       $plugin->expects($this->any())
         ->method('getWeight')
         ->will($this->returnValue($plugin_definition['weight']));
       $this->controllerResolver->expects($this->any())
         ->method('getArguments')
-        ->with($this->request, array($plugin, 'getTitle'))
-        ->will($this->returnValue(array()));
-      $map[] = array($plugin_id, array(), $plugin);
+        ->with($this->request, [$plugin, 'getTitle'])
+        ->will($this->returnValue([]));
+      $map[] = [$plugin_id, [], $plugin];
     }
     $this->factory->expects($this->any())
       ->method('createInstance')
@@ -184,199 +184,199 @@ public function testGetActionsForRoute($route_appears, array $plugin_definitions
 
   public function getActionsForRouteProvider() {
     // Single available and single expected plugins.
-    $data[] = array(
+    $data[] = [
       'test_route',
-      array(
-        'plugin_id_1' => array(
-          'appears_on' => array(
+      [
+        'plugin_id_1' => [
+          'appears_on' => [
             'test_route',
-          ),
+          ],
           'route_name' => 'test_route_2',
           'title' => 'Plugin ID 1',
           'weight' => 0,
-        ),
-      ),
-      array(
-        '#cache' => array(
-          'contexts' => array('route'),
-        ),
-        'plugin_id_1' => array(
+        ],
+      ],
+      [
+        '#cache' => [
+          'contexts' => ['route'],
+        ],
+        'plugin_id_1' => [
           '#theme' => 'menu_local_action',
-          '#link' => array(
+          '#link' => [
             'title' => 'Plugin ID 1',
             'url' => Url::fromRoute('test_route_2'),
             'localized_options' => '',
-          ),
+          ],
           '#access' => AccessResult::forbidden(),
           '#weight' => 0,
-          '#cache' => array(
-            'contexts' => array(),
-            'tags' => array(),
+          '#cache' => [
+            'contexts' => [],
+            'tags' => [],
             'max-age' => 0,
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
     // Multiple available and single expected plugins.
-    $data[] = array(
+    $data[] = [
       'test_route',
-      array(
-        'plugin_id_1' => array(
-          'appears_on' => array(
+      [
+        'plugin_id_1' => [
+          'appears_on' => [
             'test_route',
-          ),
+          ],
           'route_name' => 'test_route_2',
           'title' => 'Plugin ID 1',
           'weight' => 0,
-        ),
-        'plugin_id_2' => array(
-          'appears_on' => array(
+        ],
+        'plugin_id_2' => [
+          'appears_on' => [
             'test_route2',
-          ),
+          ],
           'route_name' => 'test_route_3',
           'title' => 'Plugin ID 2',
           'weight' => 0,
-        ),
-      ),
-      array(
-        '#cache' => array(
-          'contexts' => array('route'),
-        ),
-        'plugin_id_1' => array(
+        ],
+      ],
+      [
+        '#cache' => [
+          'contexts' => ['route'],
+        ],
+        'plugin_id_1' => [
           '#theme' => 'menu_local_action',
-          '#link' => array(
+          '#link' => [
             'title' => 'Plugin ID 1',
             'url' => Url::fromRoute('test_route_2'),
             'localized_options' => '',
-          ),
+          ],
           '#access' => AccessResult::forbidden(),
           '#weight' => 0,
-          '#cache' => array(
-            'contexts' => array(),
-            'tags' => array(),
+          '#cache' => [
+            'contexts' => [],
+            'tags' => [],
             'max-age' => 0,
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
 
     // Multiple available and multiple expected plugins and specified weight.
-    $data[] = array(
+    $data[] = [
       'test_route',
-      array(
-        'plugin_id_1' => array(
-          'appears_on' => array(
+      [
+        'plugin_id_1' => [
+          'appears_on' => [
             'test_route',
-          ),
+          ],
           'route_name' => 'test_route_2',
           'title' => 'Plugin ID 1',
           'weight' => 1,
-        ),
-        'plugin_id_2' => array(
-          'appears_on' => array(
+        ],
+        'plugin_id_2' => [
+          'appears_on' => [
             'test_route',
-          ),
+          ],
           'route_name' => 'test_route_3',
           'title' => 'Plugin ID 2',
           'weight' => 0,
-        ),
-      ),
-      array(
-        '#cache' => array(
-          'contexts' => array('route'),
-        ),
-        'plugin_id_1' => array(
+        ],
+      ],
+      [
+        '#cache' => [
+          'contexts' => ['route'],
+        ],
+        'plugin_id_1' => [
           '#theme' => 'menu_local_action',
-          '#link' => array(
+          '#link' => [
             'title' => 'Plugin ID 1',
             'url' => Url::fromRoute('test_route_2'),
             'localized_options' => '',
-          ),
+          ],
           '#access' => AccessResult::forbidden(),
           '#weight' => 1,
-          '#cache' => array(
-            'contexts' => array(),
-            'tags' => array(),
+          '#cache' => [
+            'contexts' => [],
+            'tags' => [],
             'max-age' => 0,
-          ),
-        ),
-        'plugin_id_2' => array(
+          ],
+        ],
+        'plugin_id_2' => [
           '#theme' => 'menu_local_action',
-          '#link' => array(
+          '#link' => [
             'title' => 'Plugin ID 2',
             'url' => Url::fromRoute('test_route_3'),
             'localized_options' => '',
-          ),
+          ],
           '#access' => AccessResult::forbidden(),
           '#weight' => 0,
-          '#cache' => array(
-            'contexts' => array(),
-            'tags' => array(),
+          '#cache' => [
+            'contexts' => [],
+            'tags' => [],
             'max-age' => 0,
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
 
     // Two plugins with the same route name but different route parameters.
-    $data[] = array(
+    $data[] = [
       'test_route',
-      array(
-        'plugin_id_1' => array(
-          'appears_on' => array(
+      [
+        'plugin_id_1' => [
+          'appears_on' => [
             'test_route',
-          ),
+          ],
           'route_name' => 'test_route_2',
-          'route_parameters' => array('test1'),
+          'route_parameters' => ['test1'],
           'title' => 'Plugin ID 1',
           'weight' => 1,
-        ),
-        'plugin_id_2' => array(
-          'appears_on' => array(
+        ],
+        'plugin_id_2' => [
+          'appears_on' => [
             'test_route',
-          ),
+          ],
           'route_name' => 'test_route_2',
-          'route_parameters' => array('test2'),
+          'route_parameters' => ['test2'],
           'title' => 'Plugin ID 2',
           'weight' => 0,
-        ),
-      ),
-      array(
-        '#cache' => array(
-          'contexts' => array('route'),
-        ),
-        'plugin_id_1' => array(
+        ],
+      ],
+      [
+        '#cache' => [
+          'contexts' => ['route'],
+        ],
+        'plugin_id_1' => [
           '#theme' => 'menu_local_action',
-          '#link' => array(
+          '#link' => [
             'title' => 'Plugin ID 1',
             'url' => Url::fromRoute('test_route_2', ['test1']),
             'localized_options' => '',
-          ),
+          ],
           '#access' => AccessResult::forbidden(),
           '#weight' => 1,
-          '#cache' => array(
-            'contexts' => array(),
-            'tags' => array(),
+          '#cache' => [
+            'contexts' => [],
+            'tags' => [],
             'max-age' => 0,
-          ),
-        ),
-        'plugin_id_2' => array(
+          ],
+        ],
+        'plugin_id_2' => [
           '#theme' => 'menu_local_action',
-          '#link' => array(
+          '#link' => [
             'title' => 'Plugin ID 2',
             'url' => Url::fromRoute('test_route_2', ['test2']),
             'localized_options' => '',
-          ),
+          ],
           '#access' => AccessResult::forbidden(),
           '#weight' => 0,
-          '#cache' => array(
-            'contexts' => array(),
-            'tags' => array(),
+          '#cache' => [
+            'contexts' => [],
+            'tags' => [],
             'max-age' => 0,
-          ),
-        ),
-      ),
-    );
+          ],
+        ],
+      ],
+    ];
 
     return $data;
   }
@@ -397,7 +397,7 @@ public function __construct(ControllerResolverInterface $controller_resolver, Re
     $this->routeMatch = $route_match;
     $this->moduleHandler = $module_handler;
     $this->alterInfo('menu_local_actions');
-    $this->setCacheBackend($cache_backend, 'local_action_plugins', array('local_action'));
+    $this->setCacheBackend($cache_backend, 'local_action_plugins', ['local_action']);
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Menu/LocalTaskDefaultTest.php b/core/tests/Drupal/Tests/Core/Menu/LocalTaskDefaultTest.php
index 1e7ec1ed8bba39897346cb2ed6977847b84e6def..84b91afe97d7322432d4c64d84bc0e54c8e094aa 100644
--- a/core/tests/Drupal/Tests/Core/Menu/LocalTaskDefaultTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalTaskDefaultTest.php
@@ -32,7 +32,7 @@ class LocalTaskDefaultTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $config = array();
+  protected $config = [];
 
   /**
    * The used plugin ID.
@@ -46,9 +46,9 @@ class LocalTaskDefaultTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $pluginDefinition = array(
+  protected $pluginDefinition = [
     'id' => 'local_task_default',
-  );
+  ];
 
   /**
    * The mocked translator.
@@ -84,9 +84,9 @@ protected function setupLocalTaskDefault() {
    * @covers ::getRouteParameters
    */
   public function testGetRouteParametersForStaticRoute() {
-    $this->pluginDefinition = array(
+    $this->pluginDefinition = [
       'route_name' => 'test_route'
-    );
+    ];
 
     $this->routeProvider->expects($this->once())
       ->method('getRouteByName')
@@ -96,17 +96,17 @@ public function testGetRouteParametersForStaticRoute() {
     $this->setupLocalTaskDefault();
 
     $route_match = new RouteMatch('', new Route('/'));
-    $this->assertEquals(array(), $this->localTaskBase->getRouteParameters($route_match));
+    $this->assertEquals([], $this->localTaskBase->getRouteParameters($route_match));
   }
 
   /**
    * @covers ::getRouteParameters
    */
   public function testGetRouteParametersInPluginDefinitions() {
-    $this->pluginDefinition = array(
+    $this->pluginDefinition = [
       'route_name' => 'test_route',
-      'route_parameters' => array('parameter' => 'example')
-    );
+      'route_parameters' => ['parameter' => 'example']
+    ];
 
     $this->routeProvider->expects($this->once())
       ->method('getRouteByName')
@@ -116,16 +116,16 @@ public function testGetRouteParametersInPluginDefinitions() {
     $this->setupLocalTaskDefault();
 
     $route_match = new RouteMatch('', new Route('/'));
-    $this->assertEquals(array('parameter' => 'example'), $this->localTaskBase->getRouteParameters($route_match));
+    $this->assertEquals(['parameter' => 'example'], $this->localTaskBase->getRouteParameters($route_match));
   }
 
   /**
    * @covers ::getRouteParameters
    */
   public function testGetRouteParametersForDynamicRouteWithNonUpcastedParameters() {
-    $this->pluginDefinition = array(
+    $this->pluginDefinition = [
       'route_name' => 'test_route'
-    );
+    ];
 
     $route = new Route('/test-route/{parameter}');
     $this->routeProvider->expects($this->once())
@@ -135,9 +135,9 @@ public function testGetRouteParametersForDynamicRouteWithNonUpcastedParameters()
 
     $this->setupLocalTaskDefault();
 
-    $route_match = new RouteMatch('', $route, array(), array('parameter' => 'example'));
+    $route_match = new RouteMatch('', $route, [], ['parameter' => 'example']);
 
-    $this->assertEquals(array('parameter' => 'example'), $this->localTaskBase->getRouteParameters($route_match));
+    $this->assertEquals(['parameter' => 'example'], $this->localTaskBase->getRouteParameters($route_match));
   }
 
   /**
@@ -146,9 +146,9 @@ public function testGetRouteParametersForDynamicRouteWithNonUpcastedParameters()
    * @covers ::getRouteParameters
    */
   public function testGetRouteParametersForDynamicRouteWithUpcastedParameters() {
-    $this->pluginDefinition = array(
+    $this->pluginDefinition = [
       'route_name' => 'test_route'
-    );
+    ];
 
     $route = new Route('/test-route/{parameter}');
     $this->routeProvider->expects($this->once())
@@ -158,8 +158,8 @@ public function testGetRouteParametersForDynamicRouteWithUpcastedParameters() {
 
     $this->setupLocalTaskDefault();
 
-    $route_match = new RouteMatch('', $route, array('parameter' => (object) 'example2'), array('parameter' => 'example'));
-    $this->assertEquals(array('parameter' => 'example'), $this->localTaskBase->getRouteParameters($route_match));
+    $route_match = new RouteMatch('', $route, ['parameter' => (object) 'example2'], ['parameter' => 'example']);
+    $this->assertEquals(['parameter' => 'example'], $this->localTaskBase->getRouteParameters($route_match));
   }
 
   /**
@@ -169,40 +169,40 @@ public function testGetRouteParametersForDynamicRouteWithUpcastedParameters() {
    *   A list or test plugin definition and expected weight.
    */
   public function providerTestGetWeight() {
-    return array(
+    return [
       // Manually specify a weight, so this is used.
-      array(array('weight' => 314), 'test_id', 314),
+      [['weight' => 314], 'test_id', 314],
       // Ensure that a default tab gets a lower weight.
-      array(
-        array(
+      [
+        [
           'base_route' => 'local_task_default',
           'route_name' => 'local_task_default',
           'id' => 'local_task_default'
-        ),
+        ],
         'local_task_default',
         -10
-      ),
+      ],
       // If the base route is different from the route of the tab, ignore it.
-      array(
-        array(
+      [
+        [
           'base_route' => 'local_task_example',
           'route_name' => 'local_task_other',
           'id' => 'local_task_default'
-        ),
+        ],
         'local_task_default',
         0,
-      ),
+      ],
       // Ensure that a default tab of a derivative gets the default value.
-      array(
-        array(
+      [
+        [
           'base_route' => 'local_task_example',
           'id' => 'local_task_derivative_default:example_id',
           'route_name' => 'local_task_example',
-        ),
+        ],
         'local_task_derivative_default:example_id',
         -10,
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -248,7 +248,7 @@ public function testGetTitle() {
    */
   public function testGetTitleWithContext() {
     $title = 'Example';
-    $this->pluginDefinition['title'] = (new TranslatableMarkup($title, array(), array('context' => 'context'), $this->stringTranslation));
+    $this->pluginDefinition['title'] = (new TranslatableMarkup($title, [], ['context' => 'context'], $this->stringTranslation));
     $this->stringTranslation->expects($this->once())
       ->method('translateString')
       ->with($this->pluginDefinition['title'])
@@ -262,7 +262,7 @@ public function testGetTitleWithContext() {
    * @covers ::getTitle
    */
   public function testGetTitleWithTitleArguments() {
-    $this->pluginDefinition['title'] = (new TranslatableMarkup('Example @test', array('@test' => 'value'), [], $this->stringTranslation));
+    $this->pluginDefinition['title'] = (new TranslatableMarkup('Example @test', ['@test' => 'value'], [], $this->stringTranslation));
     $this->stringTranslation->expects($this->once())
       ->method('translateString')
       ->with($this->pluginDefinition['title'])
@@ -276,9 +276,9 @@ public function testGetTitleWithTitleArguments() {
    * @covers ::getOptions
    */
   public function testGetOptions() {
-    $this->pluginDefinition['options'] = array(
-      'attributes' => array('class' => array('example')),
-    );
+    $this->pluginDefinition['options'] = [
+      'attributes' => ['class' => ['example']],
+    ];
 
     $this->setupLocalTaskDefault();
 
@@ -287,14 +287,14 @@ public function testGetOptions() {
 
     $this->localTaskBase->setActive(TRUE);
 
-    $this->assertEquals(array(
-      'attributes' => array(
-        'class' => array(
+    $this->assertEquals([
+      'attributes' => [
+        'class' => [
           'example',
           'is-active'
-        )
-      )
-    ), $this->localTaskBase->getOptions($route_match));
+        ]
+      ]
+    ], $this->localTaskBase->getOptions($route_match));
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTestBase.php b/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTestBase.php
index 5537046cb3ba7a9ec91ec2c036d84f8ae66f33f0..8ac0bbf5366e491976abb2b882a5888f1d18c36b 100644
--- a/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTestBase.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalTaskIntegrationTestBase.php
@@ -44,7 +44,7 @@ protected function setUp() {
     parent::setUp();
 
     $container = new ContainerBuilder();
-    $config_factory = $this->getConfigFactoryStub(array());
+    $config_factory = $this->getConfigFactoryStub([]);
     $container->set('config.factory', $config_factory);
     $container->set('app.root', $this->root);
     \Drupal::setContainer($container);
@@ -115,7 +115,7 @@ protected function getLocalTaskManager($module_dirs, $route_name, $route_params)
     $property->setValue($manager, $factory);
 
     $cache_backend = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
-    $manager->setCacheBackend($cache_backend, 'local_task.en', array('local_task'));
+    $manager->setCacheBackend($cache_backend, 'local_task.en', ['local_task']);
 
     return $manager;
   }
@@ -130,9 +130,9 @@ protected function getLocalTaskManager($module_dirs, $route_name, $route_params)
    * @param array $route_params
    *   (optional) a list of route parameters used to resolve tasks.
    */
-  protected function assertLocalTasks($route_name, $expected_tasks, $route_params = array()) {
+  protected function assertLocalTasks($route_name, $expected_tasks, $route_params = []) {
 
-    $directory_list = array();
+    $directory_list = [];
     foreach ($this->directoryList as $key => $value) {
       $directory_list[$key] = $this->root . '/' . $value;
     }
@@ -148,7 +148,7 @@ protected function assertLocalTasks($route_name, $expected_tasks, $route_params
     // using the DefaultPluginManager base means we get into dependency soup
     // because its factories create method and pulling services off the \Drupal
     // container.
-    $tasks = array();
+    $tasks = [];
     foreach ($tmp_tasks as $level => $level_tasks) {
       $tasks[$level] = array_keys($level_tasks);
     }
diff --git a/core/tests/Drupal/Tests/Core/Menu/LocalTaskManagerTest.php b/core/tests/Drupal/Tests/Core/Menu/LocalTaskManagerTest.php
index 2708c0c1eae5975c60f2c6a87b321dd01836a946..3d3d5015237e745d62c0a434953e41894189969a 100644
--- a/core/tests/Drupal/Tests/Core/Menu/LocalTaskManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalTaskManagerTest.php
@@ -194,7 +194,7 @@ public function testGetLocalTaskForRouteWithEmptyCache() {
 
     $this->cacheBackend->expects($this->at(3))
       ->method('set')
-      ->with('local_task_plugins:en:menu_local_task_test_tasks_view', $expected_set, Cache::PERMANENT, array('local_task'));
+      ->with('local_task_plugins:en:menu_local_task_test_tasks_view', $expected_set, Cache::PERMANENT, ['local_task']);
 
     $local_tasks = $this->manager->getLocalTasksForRoute('menu_local_task_test_tasks_view');
     $this->assertEquals($result, $local_tasks);
@@ -217,7 +217,7 @@ public function testGetLocalTaskForRouteWithFilledCache() {
     $this->cacheBackend->expects($this->at(0))
       ->method('get')
       ->with('local_task_plugins:en:menu_local_task_test_tasks_view')
-      ->will($this->returnValue((object) array('data' => $result)));
+      ->will($this->returnValue((object) ['data' => $result]));
 
     $this->cacheBackend->expects($this->never())
       ->method('set');
@@ -239,8 +239,8 @@ public function testGetTitle() {
 
     $this->controllerResolver->expects($this->once())
       ->method('getArguments')
-      ->with($this->request, array($menu_local_task, 'getTitle'))
-      ->will($this->returnValue(array()));
+      ->with($this->request, [$menu_local_task, 'getTitle'])
+      ->will($this->returnValue([]));
 
     $this->manager->getTitle($menu_local_task);
   }
@@ -254,11 +254,11 @@ protected function setupLocalTaskManager() {
     $module_handler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $module_handler->expects($this->any())
       ->method('getModuleDirectories')
-      ->willReturn(array());
+      ->willReturn([]);
     $language_manager = $this->getMock('Drupal\Core\Language\LanguageManagerInterface');
     $language_manager->expects($this->any())
       ->method('getCurrentLanguage')
-      ->will($this->returnValue(new Language(array('id' => 'en'))));
+      ->will($this->returnValue(new Language(['id' => 'en'])));
 
     $this->manager = new LocalTaskManager($this->controllerResolver, $request_stack, $this->routeMatch, $this->routeProvider, $module_handler, $this->cacheBackend, $language_manager, $this->accessManager, $this->account);
 
@@ -279,51 +279,51 @@ protected function setupLocalTaskManager() {
    *   An array of plugin definition keyed by plugin ID.
    */
   protected function getLocalTaskFixtures() {
-    $definitions = array();
-    $definitions['menu_local_task_test_tasks_settings'] = array(
+    $definitions = [];
+    $definitions['menu_local_task_test_tasks_settings'] = [
       'route_name' => 'menu_local_task_test_tasks_settings',
       'title' => 'Settings',
       'base_route' => 'menu_local_task_test_tasks_view',
-    );
-    $definitions['menu_local_task_test_tasks_edit'] = array(
+    ];
+    $definitions['menu_local_task_test_tasks_edit'] = [
       'route_name' => 'menu_local_task_test_tasks_edit',
       'title' => 'Settings',
       'base_route' => 'menu_local_task_test_tasks_view',
       'weight' => 20,
-    );
+    ];
     // Make this ID different from the route name to catch code that
     // confuses them.
-    $definitions['menu_local_task_test_tasks_view.tab'] = array(
+    $definitions['menu_local_task_test_tasks_view.tab'] = [
       'route_name' => 'menu_local_task_test_tasks_view',
       'title' => 'Settings',
       'base_route' => 'menu_local_task_test_tasks_view',
-    );
+    ];
 
-    $definitions['menu_local_task_test_tasks_view_child1'] = array(
+    $definitions['menu_local_task_test_tasks_view_child1'] = [
       'route_name' => 'menu_local_task_test_tasks_child1_page',
       'title' => 'Settings child #1',
       'parent_id' => 'menu_local_task_test_tasks_view.tab',
-    );
-    $definitions['menu_local_task_test_tasks_view_child2'] = array(
+    ];
+    $definitions['menu_local_task_test_tasks_view_child2'] = [
       'route_name' => 'menu_local_task_test_tasks_child2_page',
       'title' => 'Settings child #2',
       'parent_id' => 'menu_local_task_test_tasks_view.tab',
       'base_route' => 'this_should_be_replaced',
-    );
+    ];
     // Add the ID and defaults from the LocalTaskManager.
     foreach ($definitions as $id => &$info) {
       $info['id'] = $id;
-      $info += array(
+      $info += [
         'id' => '',
         'route_name' => '',
-        'route_parameters' => array(),
+        'route_parameters' => [],
         'title' => '',
         'base_route' => '',
         'parent_id' => NULL,
         'weight' => 0,
-        'options' => array(),
+        'options' => [],
         'class' => 'Drupal\Core\Menu\LocalTaskDefault',
-      );
+      ];
     }
     return $definitions;
   }
@@ -335,9 +335,9 @@ protected function getLocalTaskFixtures() {
    *   The mock plugin.
    */
   protected function setupFactory($mock_plugin) {
-    $map = array();
+    $map = [];
     foreach ($this->getLocalTaskFixtures() as $info) {
-      $map[] = array($info['id'], array(), $mock_plugin);
+      $map[] = [$info['id'], [], $mock_plugin];
     }
     $this->factory->expects($this->any())
       ->method('createInstance')
@@ -354,17 +354,17 @@ protected function setupFactory($mock_plugin) {
    *   The expected result, keyed by local task level.
    */
   protected function getLocalTasksForRouteResult($mock_plugin) {
-    $result = array(
-      0 => array(
+    $result = [
+      0 => [
         'menu_local_task_test_tasks_settings' => $mock_plugin,
         'menu_local_task_test_tasks_view.tab' => $mock_plugin,
         'menu_local_task_test_tasks_edit' => $mock_plugin,
-      ),
-      1 => array(
+      ],
+      1 => [
         'menu_local_task_test_tasks_view_child1' => $mock_plugin,
         'menu_local_task_test_tasks_view_child2' => $mock_plugin,
-      ),
-    );
+      ],
+    ];
     return $result;
   }
 
@@ -375,26 +375,26 @@ protected function getLocalTasksForRouteResult($mock_plugin) {
    */
   protected function getLocalTasksCache() {
     $local_task_fixtures = $this->getLocalTaskFixtures();
-    $local_tasks = array(
-      'base_routes' => array(
+    $local_tasks = [
+      'base_routes' => [
         'menu_local_task_test_tasks_view' => 'menu_local_task_test_tasks_view',
-      ),
-      'parents' => array(
+      ],
+      'parents' => [
         'menu_local_task_test_tasks_view.tab' => TRUE,
-      ),
-      'children' => array(
-        '> menu_local_task_test_tasks_view' => array(
+      ],
+      'children' => [
+        '> menu_local_task_test_tasks_view' => [
           'menu_local_task_test_tasks_settings' => $local_task_fixtures['menu_local_task_test_tasks_settings'],
           'menu_local_task_test_tasks_edit' => $local_task_fixtures['menu_local_task_test_tasks_edit'],
           'menu_local_task_test_tasks_view.tab' => $local_task_fixtures['menu_local_task_test_tasks_view.tab'],
-        ),
-        'menu_local_task_test_tasks_view.tab' => array(
+        ],
+        'menu_local_task_test_tasks_view.tab' => [
           // The manager will fill in the base_route before caching.
-          'menu_local_task_test_tasks_view_child1' => array('base_route' => 'menu_local_task_test_tasks_view') + $local_task_fixtures['menu_local_task_test_tasks_view_child1'],
-          'menu_local_task_test_tasks_view_child2' => array('base_route' => 'menu_local_task_test_tasks_view') + $local_task_fixtures['menu_local_task_test_tasks_view_child2'],
-        ),
-      ),
-    );
+          'menu_local_task_test_tasks_view_child1' => ['base_route' => 'menu_local_task_test_tasks_view'] + $local_task_fixtures['menu_local_task_test_tasks_view_child1'],
+          'menu_local_task_test_tasks_view_child2' => ['base_route' => 'menu_local_task_test_tasks_view'] + $local_task_fixtures['menu_local_task_test_tasks_view_child2'],
+        ],
+      ],
+    ];
     $local_tasks['children']['> menu_local_task_test_tasks_view']['menu_local_task_test_tasks_settings']['weight'] = 0;
     $local_tasks['children']['> menu_local_task_test_tasks_view']['menu_local_task_test_tasks_edit']['weight'] = 20 + 1e-6;
     $local_tasks['children']['> menu_local_task_test_tasks_view']['menu_local_task_test_tasks_view.tab']['weight'] = 2e-6;
diff --git a/core/tests/Drupal/Tests/Core/Menu/MenuActiveTrailTest.php b/core/tests/Drupal/Tests/Core/Menu/MenuActiveTrailTest.php
index a1d21bd2f645333ce3767773b9b287e5fddb8acd..c7639388fd1005ca741b6eebf2623dc42abf6a60 100644
--- a/core/tests/Drupal/Tests/Core/Menu/MenuActiveTrailTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/MenuActiveTrailTest.php
@@ -94,41 +94,41 @@ protected function setUp() {
    *     - expected_link: The expected active link for the given menu.
    */
   public function provider() {
-    $data = array();
+    $data = [];
 
     $mock_route = new Route('');
 
     $request = new Request();
     $request->attributes->set(RouteObjectInterface::ROUTE_NAME, 'baby_llama');
     $request->attributes->set(RouteObjectInterface::ROUTE_OBJECT, $mock_route);
-    $request->attributes->set('_raw_variables', new ParameterBag(array()));
+    $request->attributes->set('_raw_variables', new ParameterBag([]));
 
-    $link_1 = MenuLinkMock::create(array('id' => 'baby_llama_link_1', 'route_name' => 'baby_llama', 'title' => 'Baby llama', 'parent' => 'mama_llama_link'));
-    $link_2 = MenuLinkMock::create(array('id' => 'baby_llama_link_2', 'route_name' => 'baby_llama', 'title' => 'Baby llama', 'parent' => 'papa_llama_link'));
+    $link_1 = MenuLinkMock::create(['id' => 'baby_llama_link_1', 'route_name' => 'baby_llama', 'title' => 'Baby llama', 'parent' => 'mama_llama_link']);
+    $link_2 = MenuLinkMock::create(['id' => 'baby_llama_link_2', 'route_name' => 'baby_llama', 'title' => 'Baby llama', 'parent' => 'papa_llama_link']);
 
     // @see \Drupal\Core\Menu\MenuLinkManagerInterface::getParentIds()
-    $link_1_parent_ids = array('baby_llama_link_1', 'mama_llama_link', '');
-    $empty_active_trail = array('');
+    $link_1_parent_ids = ['baby_llama_link_1', 'mama_llama_link', ''];
+    $empty_active_trail = [''];
 
     // No active link is returned when zero links match the current route.
-    $data[] = array($request, array(), $this->randomMachineName(), NULL, $empty_active_trail);
+    $data[] = [$request, [], $this->randomMachineName(), NULL, $empty_active_trail];
 
     // The first (and only) matching link is returned when one link matches the
     // current route.
-    $data[] = array($request, array('baby_llama_link_1' => $link_1), $this->randomMachineName(), $link_1, $link_1_parent_ids);
+    $data[] = [$request, ['baby_llama_link_1' => $link_1], $this->randomMachineName(), $link_1, $link_1_parent_ids];
 
     // The first of multiple matching links is returned when multiple links
     // match the current route, where "first" is determined by sorting by key.
-    $data[] = array($request, array('baby_llama_link_1' => $link_1, 'baby_llama_link_2' => $link_2), $this->randomMachineName(), $link_1, $link_1_parent_ids);
+    $data[] = [$request, ['baby_llama_link_1' => $link_1, 'baby_llama_link_2' => $link_2], $this->randomMachineName(), $link_1, $link_1_parent_ids];
 
     // No active link is returned in case of a 403.
     $request = new Request();
     $request->attributes->set('_exception_statuscode', 403);
-    $data[] = array($request, FALSE, $this->randomMachineName(), NULL, $empty_active_trail);
+    $data[] = [$request, FALSE, $this->randomMachineName(), NULL, $empty_active_trail];
 
     // No active link is returned when the route name is missing.
     $request = new Request();
-    $data[] = array($request, FALSE, $this->randomMachineName(), NULL, $empty_active_trail);
+    $data[] = [$request, FALSE, $this->randomMachineName(), NULL, $empty_active_trail];
 
     return $data;
   }
@@ -173,9 +173,9 @@ public function testGetActiveTrailIds(Request $request, $links, $menu_name, $exp
       if ($expected_link !== NULL) {
         $this->menuLinkManager->expects($this->exactly(2))
           ->method('getParentIds')
-          ->will($this->returnValueMap(array(
-            array($expected_link->getPluginId(), $expected_trail_ids),
-          )));
+          ->will($this->returnValueMap([
+            [$expected_link->getPluginId(), $expected_trail_ids],
+          ]));
       }
     }
 
@@ -213,9 +213,9 @@ public function testGetCid() {
 
     $this->menuLinkManager->expects($this->any())
       ->method('getParentIds')
-      ->will($this->returnValueMap(array(
-        array($expected_link->getPluginId(), $expected_trail_ids),
-      )));
+      ->will($this->returnValueMap([
+        [$expected_link->getPluginId(), $expected_trail_ids],
+      ]));
 
     $this->assertSame($expected_trail_ids, $this->menuActiveTrail->getActiveTrailIds($data[2]));
 
diff --git a/core/tests/Drupal/Tests/Core/Menu/MenuLinkMock.php b/core/tests/Drupal/Tests/Core/Menu/MenuLinkMock.php
index 14c621ea2caba50e8f9bef9901e6b95c0e1f21e4..5c3905c6b31f23db596e6002d2a8c87e3c4a71a5 100644
--- a/core/tests/Drupal/Tests/Core/Menu/MenuLinkMock.php
+++ b/core/tests/Drupal/Tests/Core/Menu/MenuLinkMock.php
@@ -10,18 +10,18 @@
  */
 class MenuLinkMock extends MenuLinkBase {
 
-  protected static $defaults = array(
+  protected static $defaults = [
     'menu_name' => 'mock',
     'route_name' => 'MUST BE PROVIDED',
-    'route_parameters' => array(),
+    'route_parameters' => [],
     'url' => '',
     'title' => 'MUST BE PROVIDED',
-    'title_arguments' => array(),
+    'title_arguments' => [],
     'title_context' => '',
     'description' => '',
     'parent' => 'MUST BE PROVIDED',
     'weight' => '0',
-    'options' => array(),
+    'options' => [],
     'expanded' => '0',
     'enabled' => '1',
     'provider' => 'simpletest',
@@ -33,13 +33,13 @@ class MenuLinkMock extends MenuLinkBase {
     'class' => 'Drupal\\Tests\\Core\Menu\\MenuLinkMock',
     'form_class' => 'Drupal\\Core\\Menu\\Form\\MenuLinkDefaultForm',
     'id' => 'MUST BE PROVIDED',
-  );
+  ];
 
   /**
    * Create an instance from a definition with at least id, title, route_name.
    */
   public static function create($definition) {
-    return new static(array(), $definition['id'], $definition + static::$defaults);
+    return new static([], $definition['id'], $definition + static::$defaults);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Menu/MenuLinkTreeElementTest.php b/core/tests/Drupal/Tests/Core/Menu/MenuLinkTreeElementTest.php
index 0ea100703198aad2b1655fcee169ce80d619a8a2..a18cf8cf7653b45cee1e60fe6dcdf0d4d95592a6 100644
--- a/core/tests/Drupal/Tests/Core/Menu/MenuLinkTreeElementTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/MenuLinkTreeElementTest.php
@@ -20,13 +20,13 @@ class MenuLinkTreeElementTest extends UnitTestCase {
    * @covers ::__construct
    */
   public function testConstruction() {
-    $link = MenuLinkMock::create(array('id' => 'test'));
-    $item = new MenuLinkTreeElement($link, FALSE, 3, FALSE, array());
+    $link = MenuLinkMock::create(['id' => 'test']);
+    $item = new MenuLinkTreeElement($link, FALSE, 3, FALSE, []);
     $this->assertSame($link, $item->link);
     $this->assertSame(FALSE, $item->hasChildren);
     $this->assertSame(3, $item->depth);
     $this->assertSame(FALSE, $item->inActiveTrail);
-    $this->assertSame(array(), $item->subtree);
+    $this->assertSame([], $item->subtree);
   }
 
   /**
@@ -35,10 +35,10 @@ public function testConstruction() {
    * @covers ::count
    */
   public function testCount() {
-    $link_1 = MenuLinkMock::create(array('id' => 'test_1'));
-    $link_2 = MenuLinkMock::create(array('id' => 'test_2'));
-    $child_item = new MenuLinkTreeElement($link_2, FALSE, 2, FALSE, array());
-    $parent_item = new MenuLinkTreeElement($link_1, FALSE, 2, FALSE, array($child_item));
+    $link_1 = MenuLinkMock::create(['id' => 'test_1']);
+    $link_2 = MenuLinkMock::create(['id' => 'test_2']);
+    $child_item = new MenuLinkTreeElement($link_2, FALSE, 2, FALSE, []);
+    $parent_item = new MenuLinkTreeElement($link_1, FALSE, 2, FALSE, [$child_item]);
     $this->assertSame(1, $child_item->count());
     $this->assertSame(2, $parent_item->count());
   }
diff --git a/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php b/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
index e9d664e98ec3727abd82029ab21faa61c0a280b0..ccaf3b9c72e086e892d45a5155e2f6a15cf9be9f 100644
--- a/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
@@ -18,22 +18,22 @@ class MenuTreeParametersTest extends UnitTestCase {
    * Provides test data for testSetMinDepth().
    */
   public function providerTestSetMinDepth() {
-    $data = array();
+    $data = [];
 
     // Valid values at the extremes and in the middle.
-    $data[] = array(1, 1);
-    $data[] = array(2, 2);
-    $data[] = array(9, 9);
+    $data[] = [1, 1];
+    $data[] = [2, 2];
+    $data[] = [9, 9];
 
     // Invalid values are mapped to the closest valid value.
-    $data[] = array(-10000, 1);
-    $data[] = array(0, 1);
+    $data[] = [-10000, 1];
+    $data[] = [0, 1];
     // … except for those invalid values that reach beyond the maximum depth,
     // because MenuTreeParameters is a value object and hence cannot depend
     // on anything; to know the actual maximum depth, it'd have to depend on the
     // MenuTreeStorage service.
-    $data[] = array(10, 10);
-    $data[] = array(100000, 100000);
+    $data[] = [10, 10];
+    $data[] = [100000, 100000];
 
     return $data;
   }
@@ -59,21 +59,21 @@ public function testAddExpanded() {
     $parameters = new MenuTreeParameters();
 
     // Verify default value.
-    $this->assertEquals(array(), $parameters->expandedParents);
+    $this->assertEquals([], $parameters->expandedParents);
 
     // Add actual menu link plugin IDs to be expanded.
-    $parameters->addExpandedParents(array('foo', 'bar', 'baz'));
-    $this->assertEquals(array('foo', 'bar', 'baz'), $parameters->expandedParents);
+    $parameters->addExpandedParents(['foo', 'bar', 'baz']);
+    $this->assertEquals(['foo', 'bar', 'baz'], $parameters->expandedParents);
 
     // Add additional menu link plugin IDs; they should be merged, not replacing
     // the old ones.
-    $parameters->addExpandedParents(array('qux', 'quux'));
-    $this->assertEquals(array('foo', 'bar', 'baz', 'qux', 'quux'), $parameters->expandedParents);
+    $parameters->addExpandedParents(['qux', 'quux']);
+    $this->assertEquals(['foo', 'bar', 'baz', 'qux', 'quux'], $parameters->expandedParents);
 
     // Add pre-existing menu link plugin IDs; they should not be added again;
     // this is a set.
-    $parameters->addExpandedParents(array('bar', 'quux'));
-    $this->assertEquals(array('foo', 'bar', 'baz', 'qux', 'quux'), $parameters->expandedParents);
+    $parameters->addExpandedParents(['bar', 'quux']);
+    $this->assertEquals(['foo', 'bar', 'baz', 'qux', 'quux'], $parameters->expandedParents);
   }
 
   /**
@@ -85,28 +85,28 @@ public function testAddCondition() {
     $parameters = new MenuTreeParameters();
 
     // Verify default value.
-    $this->assertEquals(array(), $parameters->conditions);
+    $this->assertEquals([], $parameters->conditions);
 
     // Add a condition.
     $parameters->addCondition('expanded', 1);
-    $this->assertEquals(array('expanded' => 1), $parameters->conditions);
+    $this->assertEquals(['expanded' => 1], $parameters->conditions);
 
     // Add another condition.
     $parameters->addCondition('has_children', 0);
-    $this->assertEquals(array('expanded' => 1, 'has_children' => 0), $parameters->conditions);
+    $this->assertEquals(['expanded' => 1, 'has_children' => 0], $parameters->conditions);
 
     // Add a condition with an operator.
-    $parameters->addCondition('provider', array('module1', 'module2'), 'IN');
-    $this->assertEquals(array('expanded' => 1, 'has_children' => 0, 'provider' => array(array('module1', 'module2'), 'IN')), $parameters->conditions);
+    $parameters->addCondition('provider', ['module1', 'module2'], 'IN');
+    $this->assertEquals(['expanded' => 1, 'has_children' => 0, 'provider' => [['module1', 'module2'], 'IN']], $parameters->conditions);
 
     // Add another condition with an operator.
     $parameters->addCondition('id', 1337, '<');
-    $this->assertEquals(array('expanded' => 1, 'has_children' => 0, 'provider' => array(array('module1', 'module2'), 'IN'), 'id' => array(1337, '<')), $parameters->conditions);
+    $this->assertEquals(['expanded' => 1, 'has_children' => 0, 'provider' => [['module1', 'module2'], 'IN'], 'id' => [1337, '<']], $parameters->conditions);
 
     // It's impossible to add two conditions on the same field; in that case,
     // the old condition will be overwritten.
     $parameters->addCondition('provider', 'other_module');
-    $this->assertEquals(array('expanded' => 1, 'has_children' => 0, 'provider' => 'other_module', 'id' => array(1337, '<')), $parameters->conditions);
+    $this->assertEquals(['expanded' => 1, 'has_children' => 0, 'provider' => 'other_module', 'id' => [1337, '<']], $parameters->conditions);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Menu/StaticMenuLinkOverridesTest.php b/core/tests/Drupal/Tests/Core/Menu/StaticMenuLinkOverridesTest.php
index e09a56e81a62332713ade3a744f04e72cabd26c7..98a122ca214b8369ad52f1118e20f6d504e54f4f 100644
--- a/core/tests/Drupal/Tests/Core/Menu/StaticMenuLinkOverridesTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/StaticMenuLinkOverridesTest.php
@@ -17,7 +17,7 @@ class StaticMenuLinkOverridesTest extends UnitTestCase {
    * @covers ::__construct
    */
   public function testConstruct() {
-    $config_factory = $this->getConfigFactoryStub(array('core.menu.static_menu_link_overrides' => array()));
+    $config_factory = $this->getConfigFactoryStub(['core.menu.static_menu_link_overrides' => []]);
     $static_override = new StaticMenuLinkOverrides($config_factory);
 
     $this->assertAttributeEquals($config_factory, 'configFactory', $static_override);
@@ -48,7 +48,7 @@ public function testReload() {
    * @covers ::getConfig
    */
   public function testLoadOverride($overrides, $id, $expected) {
-    $config_factory = $this->getConfigFactoryStub(array('core.menu.static_menu_link_overrides' => array('definitions' => $overrides)));
+    $config_factory = $this->getConfigFactoryStub(['core.menu.static_menu_link_overrides' => ['definitions' => $overrides]]);
     $static_override = new StaticMenuLinkOverrides($config_factory);
 
     $this->assertEquals($expected, $static_override->loadOverride($id));
@@ -58,15 +58,15 @@ public function testLoadOverride($overrides, $id, $expected) {
    * Provides test data for testLoadOverride.
    */
   public function providerTestLoadOverride() {
-    $data = array();
+    $data = [];
     // No specified ID.
-    $data[] = array(array('test1' => array('parent' => 'test0')), NULL, array());
+    $data[] = [['test1' => ['parent' => 'test0']], NULL, []];
     // Valid ID.
-    $data[] = array(array('test1' => array('parent' => 'test0')), 'test1', array('parent' => 'test0'));
+    $data[] = [['test1' => ['parent' => 'test0']], 'test1', ['parent' => 'test0']];
     // Non existing ID.
-    $data[] = array(array('test1' => array('parent' => 'test0')), 'test2', array());
+    $data[] = [['test1' => ['parent' => 'test0']], 'test2', []];
     // Ensure that the ID is encoded properly
-    $data[] = array(array('test1__la___ma' => array('parent' => 'test0')), 'test1.la__ma', array('parent' => 'test0'));
+    $data[] = [['test1__la___ma' => ['parent' => 'test0']], 'test1.la__ma', ['parent' => 'test0']];
 
     return $data;
   }
@@ -78,15 +78,15 @@ public function providerTestLoadOverride() {
    * @covers ::getConfig
    */
   public function testLoadMultipleOverrides() {
-    $overrides = array();
-    $overrides['test1'] = array('parent' => 'test0');
-    $overrides['test2'] = array('parent' => 'test1');
-    $overrides['test1__la___ma'] = array('parent' => 'test2');
+    $overrides = [];
+    $overrides['test1'] = ['parent' => 'test0'];
+    $overrides['test2'] = ['parent' => 'test1'];
+    $overrides['test1__la___ma'] = ['parent' => 'test2'];
 
-    $config_factory = $this->getConfigFactoryStub(array('core.menu.static_menu_link_overrides' => array('definitions' => $overrides)));
+    $config_factory = $this->getConfigFactoryStub(['core.menu.static_menu_link_overrides' => ['definitions' => $overrides]]);
     $static_override = new StaticMenuLinkOverrides($config_factory);
 
-    $this->assertEquals(array('test1' => array('parent' => 'test0'), 'test1.la__ma' => array('parent' => 'test2')), $static_override->loadMultipleOverrides(array('test1', 'test1.la__ma')));
+    $this->assertEquals(['test1' => ['parent' => 'test0'], 'test1.la__ma' => ['parent' => 'test2']], $static_override->loadMultipleOverrides(['test1', 'test1.la__ma']));
   }
 
   /**
@@ -103,23 +103,23 @@ public function testSaveOverride() {
     $config->expects($this->at(0))
       ->method('get')
       ->with('definitions')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
     $config->expects($this->at(1))
       ->method('get')
       ->with('definitions')
-      ->will($this->returnValue(array()));
-
-    $definition_save_1 = array(
-      'definitions' => array(
-        'test1' => array('parent' => 'test0', 'menu_name' => '', 'weight' => 0, 'expanded' => FALSE, 'enabled' => FALSE)
-      )
-    );
-    $definitions_save_2 = array(
-      'definitions' => array(
-        'test1' => array('parent' => 'test0', 'menu_name' => '', 'weight' => 0, 'expanded' => FALSE, 'enabled' => FALSE),
-        'test1__la___ma' => array('parent' => 'test1', 'menu_name' => '', 'weight' => 0, 'expanded' => FALSE, 'enabled' => FALSE)
-      )
-    );
+      ->will($this->returnValue([]));
+
+    $definition_save_1 = [
+      'definitions' => [
+        'test1' => ['parent' => 'test0', 'menu_name' => '', 'weight' => 0, 'expanded' => FALSE, 'enabled' => FALSE]
+      ]
+    ];
+    $definitions_save_2 = [
+      'definitions' => [
+        'test1' => ['parent' => 'test0', 'menu_name' => '', 'weight' => 0, 'expanded' => FALSE, 'enabled' => FALSE],
+        'test1__la___ma' => ['parent' => 'test1', 'menu_name' => '', 'weight' => 0, 'expanded' => FALSE, 'enabled' => FALSE]
+      ]
+    ];
     $config->expects($this->at(2))
       ->method('set')
       ->with('definitions', $definition_save_1['definitions'])
@@ -148,8 +148,8 @@ public function testSaveOverride() {
 
     $static_override = new StaticMenuLinkOverrides($config_factory);
 
-    $static_override->saveOverride('test1', array('parent' => 'test0'));
-    $static_override->saveOverride('test1.la__ma', array('parent' => 'test1'));
+    $static_override->saveOverride('test1', ['parent' => 'test0']);
+    $static_override->saveOverride('test1.la__ma', ['parent' => 'test1']);
   }
 
   /**
@@ -202,15 +202,15 @@ public function testDeleteOverrides($ids, array $old_definitions, array $new_def
    * Provides test data for testDeleteOverrides.
    */
   public function providerTestDeleteOverrides() {
-    $data = array();
+    $data = [];
     // Delete a non existing ID.
-    $data[] = array('test0', array(), array());
+    $data[] = ['test0', [], []];
     // Delete an existing ID.
-    $data[] = array('test1', array('test1' => array('parent' => 'test0')), array());
+    $data[] = ['test1', ['test1' => ['parent' => 'test0']], []];
     // Delete an existing ID with a special ID.
-    $data[] = array('test1.la__ma', array('test1__la___ma' => array('parent' => 'test0')), array());
+    $data[] = ['test1.la__ma', ['test1__la___ma' => ['parent' => 'test0']], []];
     // Delete multiple IDs.
-    $data[] = array(array('test1.la__ma', 'test1'), array('test1' => array('parent' => 'test0'), 'test1__la___ma' => array('parent' => 'test0')), array());
+    $data[] = [['test1.la__ma', 'test1'], ['test1' => ['parent' => 'test0'], 'test1__la___ma' => ['parent' => 'test0']], []];
 
     return $data;
   }
diff --git a/core/tests/Drupal/Tests/Core/PageCache/CommandLineOrUnsafeMethodTest.php b/core/tests/Drupal/Tests/Core/PageCache/CommandLineOrUnsafeMethodTest.php
index 2f62f1e8e407e0459e50e7c0623572191d96e2d1..46f78c637a1b7369c414cddf5f89ea5a1aa1fec0 100644
--- a/core/tests/Drupal/Tests/Core/PageCache/CommandLineOrUnsafeMethodTest.php
+++ b/core/tests/Drupal/Tests/Core/PageCache/CommandLineOrUnsafeMethodTest.php
@@ -22,7 +22,7 @@ class CommandLineOrUnsafeMethodTest extends UnitTestCase {
   protected function setUp() {
     // Note that it is necessary to partially mock the class under test in
     // order to disable the isCli-check.
-    $this->policy = $this->getMock('Drupal\Core\PageCache\RequestPolicy\CommandLineOrUnsafeMethod', array('isCli'));
+    $this->policy = $this->getMock('Drupal\Core\PageCache\RequestPolicy\CommandLineOrUnsafeMethod', ['isCli']);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/ParamConverter/ParamConverterManagerTest.php b/core/tests/Drupal/Tests/Core/ParamConverter/ParamConverterManagerTest.php
index cc248b0b43c06f60afb246c37d0c44b0d925787f..1c85cf6b9a069ac12f533aca93f6194c055032bd 100644
--- a/core/tests/Drupal/Tests/Core/ParamConverter/ParamConverterManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/ParamConverter/ParamConverterManagerTest.php
@@ -68,35 +68,35 @@ public function testGetConverterException() {
    * @see ParamConverterManagerTest::testAddConverter()
    */
   public function providerTestAddConverter() {
-    $converters[0]['unsorted'] = array(
-      array('name' => 'strawberry'),
-      array('name' => 'raspberry'),
-      array('name' => 'pear'),
-      array('name' => 'peach'),
-      array('name' => 'pineapple'),
-      array('name' => 'banana'),
-      array('name' => 'apple'),
-    );
-
-    $converters[0]['sorted'] = array(
+    $converters[0]['unsorted'] = [
+      ['name' => 'strawberry'],
+      ['name' => 'raspberry'],
+      ['name' => 'pear'],
+      ['name' => 'peach'],
+      ['name' => 'pineapple'],
+      ['name' => 'banana'],
+      ['name' => 'apple'],
+    ];
+
+    $converters[0]['sorted'] = [
       'strawberry', 'raspberry', 'pear', 'peach',
       'pineapple', 'banana', 'apple'
-    );
-
-    $converters[1]['unsorted'] = array(
-      array('name' => 'giraffe'),
-      array('name' => 'zebra'),
-      array('name' => 'eagle'),
-      array('name' => 'ape'),
-      array('name' => 'cat'),
-      array('name' => 'puppy'),
-      array('name' => 'llama'),
-    );
-
-    $converters[1]['sorted'] = array(
+    ];
+
+    $converters[1]['unsorted'] = [
+      ['name' => 'giraffe'],
+      ['name' => 'zebra'],
+      ['name' => 'eagle'],
+      ['name' => 'ape'],
+      ['name' => 'cat'],
+      ['name' => 'puppy'],
+      ['name' => 'llama'],
+    ];
+
+    $converters[1]['sorted'] = [
       'giraffe', 'zebra', 'eagle', 'ape',
       'cat', 'puppy', 'llama'
-    );
+    ];
 
     return $converters;
   }
@@ -111,15 +111,15 @@ public function providerTestAddConverter() {
    * @see ParamConverterManagerTest::testGetConverter()
    */
   public function providerTestGetConverter() {
-    return array(
-      array('ape', 'ApeConverterClass'),
-      array('cat', 'CatConverterClass'),
-      array('puppy', 'PuppyConverterClass'),
-      array('llama', 'LlamaConverterClass'),
-      array('giraffe', 'GiraffeConverterClass'),
-      array('zebra', 'ZebraConverterClass'),
-      array('eagle', 'EagleConverterClass'),
-    );
+    return [
+      ['ape', 'ApeConverterClass'],
+      ['cat', 'CatConverterClass'],
+      ['puppy', 'PuppyConverterClass'],
+      ['llama', 'LlamaConverterClass'],
+      ['giraffe', 'GiraffeConverterClass'],
+      ['zebra', 'ZebraConverterClass'],
+      ['eagle', 'EagleConverterClass'],
+    ];
   }
 
   /**
@@ -158,11 +158,11 @@ public function testSetRouteParameterConverters($path, $parameters = NULL, $expe
    * Provides data for testSetRouteParameterConverters().
    */
   public function providerTestSetRouteParameterConverters() {
-    return array(
-      array('/test'),
-      array('/test/{id}', array('id' => array()), 'applied'),
-      array('/test/{id}', array('id' => array('converter' => 'predefined')), 'predefined'),
-    );
+    return [
+      ['/test'],
+      ['/test/{id}', ['id' => []], 'applied'],
+      ['/test/{id}', ['id' => ['converter' => 'predefined']], 'predefined'],
+    ];
   }
 
   /**
@@ -170,22 +170,22 @@ public function providerTestSetRouteParameterConverters() {
    */
   public function testConvert() {
     $route = new Route('/test/{id}/{literal}/{null}');
-    $parameters = array(
-      'id' => array(
+    $parameters = [
+      'id' => [
         'converter' => 'test_convert',
-      ),
-      'literal' => array(),
-      'null' => array(),
-    );
+      ],
+      'literal' => [],
+      'null' => [],
+    ];
     $route->setOption('parameters', $parameters);
 
-    $defaults = array(
+    $defaults = [
       RouteObjectInterface::ROUTE_OBJECT => $route,
       RouteObjectInterface::ROUTE_NAME => 'test_route',
       'id' => 1,
       'literal' => 'this is a literal',
       'null' => NULL,
-    );
+    ];
 
     $expected = $defaults;
     $expected['id'] = 'something_better!';
@@ -207,10 +207,10 @@ public function testConvert() {
    */
   public function testConvertNoConverting() {
     $route = new Route('/test');
-    $defaults = array(
+    $defaults = [
       RouteObjectInterface::ROUTE_OBJECT => $route,
       RouteObjectInterface::ROUTE_NAME => 'test_route',
-    );
+    ];
 
     $expected = $defaults;
 
@@ -226,18 +226,18 @@ public function testConvertNoConverting() {
    */
   public function testConvertMissingParam() {
     $route = new Route('/test/{id}');
-    $parameters = array(
-      'id' => array(
+    $parameters = [
+      'id' => [
         'converter' => 'test_convert',
-      ),
-    );
+      ],
+    ];
     $route->setOption('parameters', $parameters);
 
-    $defaults = array(
+    $defaults = [
       RouteObjectInterface::ROUTE_OBJECT => $route,
       RouteObjectInterface::ROUTE_NAME => 'test_route',
       'id' => 1,
-    );
+    ];
 
     $converter = $this->getMock('Drupal\Core\ParamConverter\ParamConverterInterface');
     $converter->expects($this->any())
diff --git a/core/tests/Drupal/Tests/Core/Password/PasswordHashingTest.php b/core/tests/Drupal/Tests/Core/Password/PasswordHashingTest.php
index 5c378ed622aa7ba196025f23731c714f6315f391..efb8cac8507bcc6dbac22eaaeb87487f5ae3c7b3 100644
--- a/core/tests/Drupal/Tests/Core/Password/PasswordHashingTest.php
+++ b/core/tests/Drupal/Tests/Core/Password/PasswordHashingTest.php
@@ -152,21 +152,21 @@ public function testLongPassword($password, $allowed) {
    */
   public function providerLongPasswords() {
     // '512 byte long password is allowed.'
-    $passwords['allowed'] = array(str_repeat('x', PasswordInterface::PASSWORD_MAX_LENGTH), TRUE);
+    $passwords['allowed'] = [str_repeat('x', PasswordInterface::PASSWORD_MAX_LENGTH), TRUE];
     // 513 byte long password is not allowed.
-    $passwords['too_long'] = array(str_repeat('x', PasswordInterface::PASSWORD_MAX_LENGTH + 1), FALSE);
+    $passwords['too_long'] = [str_repeat('x', PasswordInterface::PASSWORD_MAX_LENGTH + 1), FALSE];
 
     // Check a string of 3-byte UTF-8 characters, 510 byte long password is
     // allowed.
     $len = floor(PasswordInterface::PASSWORD_MAX_LENGTH / 3);
     $diff = PasswordInterface::PASSWORD_MAX_LENGTH % 3;
-    $passwords['utf8'] = array(str_repeat('€', $len), TRUE);
+    $passwords['utf8'] = [str_repeat('€', $len), TRUE];
     // 512 byte long password is allowed.
-    $passwords['ut8_extended'] = array($passwords['utf8'][0] . str_repeat('x', $diff), TRUE);
+    $passwords['ut8_extended'] = [$passwords['utf8'][0] . str_repeat('x', $diff), TRUE];
 
     // Check a string of 3-byte UTF-8 characters, 513 byte long password is
     // allowed.
-    $passwords['utf8_too_long'] = array(str_repeat('€', $len + 1), FALSE);
+    $passwords['utf8_too_long'] = [str_repeat('€', $len + 1), FALSE];
     return $passwords;
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Path/AliasManagerTest.php b/core/tests/Drupal/Tests/Core/Path/AliasManagerTest.php
index 569f394ba1596fad1e90a0d86e8b99a046ffac37..ffd52dc4af43c06c25c02df6424fb979d3e2f397 100644
--- a/core/tests/Drupal/Tests/Core/Path/AliasManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Path/AliasManagerTest.php
@@ -85,7 +85,7 @@ protected function setUp() {
   public function testGetPathByAliasNoMatch() {
     $alias = '/' . $this->randomMachineName();
 
-    $language = new Language(array('id' => 'en'));
+    $language = new Language(['id' => 'en']);
 
     $this->languageManager->expects($this->any())
       ->method('getCurrentLanguage')
@@ -202,7 +202,7 @@ public function testGetAliasByPathNoMatch() {
     // This needs to write out the cache.
     $this->cache->expects($this->once())
       ->method('set')
-      ->with($this->cacheKey, array($language->getId() => array($path)), (int) $_SERVER['REQUEST_TIME'] + (60 * 60 * 24));
+      ->with($this->cacheKey, [$language->getId() => [$path]], (int) $_SERVER['REQUEST_TIME'] + (60 * 60 * 24));
 
     $this->aliasManager->writeCache();
   }
@@ -240,7 +240,7 @@ public function testGetAliasByPathMatch() {
     // This needs to write out the cache.
     $this->cache->expects($this->once())
       ->method('set')
-      ->with($this->cacheKey, array($language->getId() => array($path)), (int) $_SERVER['REQUEST_TIME'] + (60 * 60 * 24));
+      ->with($this->cacheKey, [$language->getId() => [$path]], (int) $_SERVER['REQUEST_TIME'] + (60 * 60 * 24));
 
     $this->aliasManager->writeCache();
   }
@@ -259,11 +259,11 @@ public function testGetAliasByPathCachedMatch() {
 
     $language = $this->setUpCurrentLanguage();
 
-    $cached_paths = array($language->getId() => array($path));
+    $cached_paths = [$language->getId() => [$path]];
     $this->cache->expects($this->once())
       ->method('get')
       ->with($this->cacheKey)
-      ->will($this->returnValue((object) array('data' => $cached_paths)));
+      ->will($this->returnValue((object) ['data' => $cached_paths]));
 
     // Simulate a request so that the preloaded paths are fetched.
     $this->aliasManager->setCacheKey($this->path);
@@ -276,7 +276,7 @@ public function testGetAliasByPathCachedMatch() {
     $this->aliasStorage->expects($this->once())
       ->method('preloadPathAlias')
       ->with($cached_paths[$language->getId()], $language->getId())
-      ->will($this->returnValue(array($path => $alias)));
+      ->will($this->returnValue([$path => $alias]));
 
     // LookupPathAlias should not be called.
     $this->aliasStorage->expects($this->never())
@@ -305,13 +305,13 @@ public function testGetAliasByPathCachedMissLanguage() {
     $alias = $this->randomMachineName();
 
     $language = $this->setUpCurrentLanguage();
-    $cached_language = new Language(array('id' => 'de'));
+    $cached_language = new Language(['id' => 'de']);
 
-    $cached_paths = array($cached_language->getId() => array($path));
+    $cached_paths = [$cached_language->getId() => [$path]];
     $this->cache->expects($this->once())
       ->method('get')
       ->with($this->cacheKey)
-      ->will($this->returnValue((object) array('data' => $cached_paths)));
+      ->will($this->returnValue((object) ['data' => $cached_paths]));
 
     // Simulate a request so that the preloaded paths are fetched.
     $this->aliasManager->setCacheKey($this->path);
@@ -356,11 +356,11 @@ public function testGetAliasByPathCachedMissNoAlias() {
 
     $language = $this->setUpCurrentLanguage();
 
-    $cached_paths = array($language->getId() => array($cached_path, $path));
+    $cached_paths = [$language->getId() => [$cached_path, $path]];
     $this->cache->expects($this->once())
       ->method('get')
       ->with($this->cacheKey)
-      ->will($this->returnValue((object) array('data' => $cached_paths)));
+      ->will($this->returnValue((object) ['data' => $cached_paths]));
 
     // Simulate a request so that the preloaded paths are fetched.
     $this->aliasManager->setCacheKey($this->path);
@@ -373,7 +373,7 @@ public function testGetAliasByPathCachedMissNoAlias() {
     $this->aliasStorage->expects($this->once())
       ->method('preloadPathAlias')
       ->with($cached_paths[$language->getId()], $language->getId())
-      ->will($this->returnValue(array($cached_path => $cached_alias)));
+      ->will($this->returnValue([$cached_path => $cached_alias]));
 
     // LookupPathAlias() should not be called.
     $this->aliasStorage->expects($this->never())
@@ -404,11 +404,11 @@ public function testGetAliasByPathUncachedMissNoAlias() {
 
     $language = $this->setUpCurrentLanguage();
 
-    $cached_paths = array($language->getId() => array($cached_path));
+    $cached_paths = [$language->getId() => [$cached_path]];
     $this->cache->expects($this->once())
       ->method('get')
       ->with($this->cacheKey)
-      ->will($this->returnValue((object) array('data' => $cached_paths)));
+      ->will($this->returnValue((object) ['data' => $cached_paths]));
 
     // Simulate a request so that the preloaded paths are fetched.
     $this->aliasManager->setCacheKey($this->path);
@@ -421,7 +421,7 @@ public function testGetAliasByPathUncachedMissNoAlias() {
     $this->aliasStorage->expects($this->once())
       ->method('preloadPathAlias')
       ->with($cached_paths[$language->getId()], $language->getId())
-      ->will($this->returnValue(array($cached_path => $cached_alias)));
+      ->will($this->returnValue([$cached_path => $cached_alias]));
 
     $this->aliasStorage->expects($this->once())
       ->method('lookupPathAlias')
@@ -493,11 +493,11 @@ public function testGetAliasByPathUncachedMissWithAlias() {
 
     $language = $this->setUpCurrentLanguage();
 
-    $cached_paths = array($language->getId() => array($cached_path, $cached_no_alias_path));
+    $cached_paths = [$language->getId() => [$cached_path, $cached_no_alias_path]];
     $this->cache->expects($this->once())
       ->method('get')
       ->with($this->cacheKey)
-      ->will($this->returnValue((object) array('data' => $cached_paths)));
+      ->will($this->returnValue((object) ['data' => $cached_paths]));
 
     // Simulate a request so that the preloaded paths are fetched.
     $this->aliasManager->setCacheKey($this->path);
@@ -510,7 +510,7 @@ public function testGetAliasByPathUncachedMissWithAlias() {
     $this->aliasStorage->expects($this->once())
       ->method('preloadPathAlias')
       ->with($cached_paths[$language->getId()], $language->getId())
-      ->will($this->returnValue(array($cached_path => $cached_alias)));
+      ->will($this->returnValue([$cached_path => $cached_alias]));
 
     $this->aliasStorage->expects($this->once())
       ->method('lookupPathAlias')
@@ -535,7 +535,7 @@ public function testGetAliasByPathUncachedMissWithAlias() {
    *   The current language object.
    */
   protected function setUpCurrentLanguage() {
-    $language = new Language(array('id' => 'en'));
+    $language = new Language(['id' => 'en']);
 
     $this->languageManager->expects($this->any())
       ->method('getCurrentLanguage')
diff --git a/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php b/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
index b456654957573e625f1ac5146c3c87cb16d9b701..7089121d5e20a36b507717dbf7db4b952928f9cb 100644
--- a/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
+++ b/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
@@ -25,11 +25,11 @@ protected function setUp() {
     // Create a stub config factory with all config settings that will be
     // checked during this test.
     $config_factory_stub = $this->getConfigFactoryStub(
-      array(
-        'system.site' => array(
+      [
+        'system.site' => [
           'page.front' => '/dummy',
-        ),
-      )
+        ],
+      ]
     );
     $route_match = $this->getMock('Drupal\Core\Routing\RouteMatchInterface');
     $this->pathMatcher = new PathMatcher($config_factory_stub, $route_match);
@@ -54,76 +54,76 @@ public function testMatchPath($patterns, $paths) {
    *   A nested array of pattern arrays and path arrays.
    */
   public function getMatchPathData() {
-    return array(
-      array(
+    return [
+      [
         // Single absolute paths.
         '/example/1',
-        array(
+        [
           '/example/1' => TRUE,
           '/example/2' => FALSE,
           '/test' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         // Single paths with wildcards.
         '/example/*',
-        array(
+        [
           '/example/1' => TRUE,
           '/example/2' => TRUE,
           '/example/3/edit' => TRUE,
           '/example/' => TRUE,
           '/example' => FALSE,
           '/test' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         // Single paths with multiple wildcards.
         '/node/*/revisions/*',
-        array(
+        [
           '/node/1/revisions/3' => TRUE,
           '/node/345/revisions/test' => TRUE,
           '/node/23/edit' => FALSE,
           '/test' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         // Single paths with '<front>'.
         "<front>",
-        array(
+        [
           '/dummy' => TRUE,
           "/dummy/" => FALSE,
           "/dummy/edit" => FALSE,
           '/node' => FALSE,
           '' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         // Paths with both '<front>' and wildcards (should not work).
         "<front>/*",
-        array(
+        [
           '/dummy' => FALSE,
           '/dummy/' => FALSE,
           '/dummy/edit' => FALSE,
           '/node/12' => FALSE,
           '/' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         // Multiple paths with the \n delimiter.
         "/node/*\n/node/*/edit",
-        array(
+        [
           '/node/1' => TRUE,
           '/node/view' => TRUE,
           '/node/32/edit' => TRUE,
           '/node/delete/edit' => TRUE,
           '/node/50/delete' => TRUE,
           '/test/example' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         // Multiple paths with the \r delimiter.
         "/user/*\r/example/*",
-        array(
+        [
           '/user/1' => TRUE,
           '/example/1' => TRUE,
           '/user/1/example/1' => TRUE,
@@ -131,26 +131,26 @@ public function getMatchPathData() {
           '/test/example' => FALSE,
           '/user' => FALSE,
           '/example' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         // Multiple paths with the \r\n delimiter.
         "/test\r\n<front>",
-        array(
+        [
           '/test' => TRUE,
           '/dummy' => TRUE,
           '/example' => FALSE,
-        ),
-      ),
-      array(
+        ],
+      ],
+      [
         // Test existing regular expressions (should be escaped).
         '[^/]+?/[0-9]',
-        array(
+        [
           '/test/1' => FALSE,
           '[^/]+?/[0-9]' => TRUE,
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorAliasTest.php b/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorAliasTest.php
index 713a5386622fff70a6caad33d8b8861611953375..0473d79d7885fc3c66bf150f8187c2b81e9d8235 100644
--- a/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorAliasTest.php
+++ b/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorAliasTest.php
@@ -41,10 +41,10 @@ protected function setUp() {
   public function testProcessInbound() {
     $this->aliasManager->expects($this->exactly(2))
       ->method('getPathByAlias')
-      ->will($this->returnValueMap(array(
-        array('urlalias', NULL, 'internal-url'),
-        array('url', NULL, 'url'),
-      )));
+      ->will($this->returnValueMap([
+        ['urlalias', NULL, 'internal-url'],
+        ['url', NULL, 'url'],
+      ]));
 
     $request = Request::create('/urlalias');
     $this->assertEquals('internal-url', $this->pathProcessor->processInbound('urlalias', $request));
@@ -60,10 +60,10 @@ public function testProcessInbound() {
   public function testProcessOutbound($path, array $options, $expected_path) {
     $this->aliasManager->expects($this->any())
       ->method('getAliasByPath')
-      ->will($this->returnValueMap(array(
-        array('internal-url', NULL, 'urlalias'),
-        array('url', NULL, 'url'),
-      )));
+      ->will($this->returnValueMap([
+        ['internal-url', NULL, 'urlalias'],
+        ['url', NULL, 'url'],
+      ]));
 
     $bubbleable_metadata = new BubbleableMetadata();
     $this->assertEquals($expected_path, $this->pathProcessor->processOutbound($path, $options, NULL, $bubbleable_metadata));
diff --git a/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorTest.php b/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorTest.php
index 1134eccab63ee696c84346161c33044667a412ec..f416570dd96a79d6624f01a0f7a0a16c330c9f59 100644
--- a/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorTest.php
+++ b/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorTest.php
@@ -38,28 +38,28 @@ class PathProcessorTest extends UnitTestCase {
   protected function setUp() {
 
     // Set up some languages to be used by the language-based path processor.
-    $languages = array();
-    foreach (array('en', 'fr') as $langcode) {
-      $language = new Language(array('id' => $langcode));
+    $languages = [];
+    foreach (['en', 'fr'] as $langcode) {
+      $language = new Language(['id' => $langcode]);
       $languages[$langcode] = $language;
     }
     $this->languages = $languages;
 
     // Create a stub configuration.
     $language_prefixes = array_keys($this->languages);
-    $config = array(
-      'url' => array(
+    $config = [
+      'url' => [
         'prefixes' => array_combine($language_prefixes, $language_prefixes)
-      )
-    );
+      ]
+    ];
 
     // Create a URL-based language negotiation method definition.
-    $method_definitions = array(
-      LanguageNegotiationUrl::METHOD_ID => array(
+    $method_definitions = [
+      LanguageNegotiationUrl::METHOD_ID => [
         'class' => '\Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrl',
         'weight' => 9,
-      ),
-    );
+      ],
+    ];
 
     // Create a URL-based language negotiation method.
     $method_instance = new LanguageNegotiationUrl($config);
@@ -75,7 +75,7 @@ protected function setUp() {
       ->will($this->returnValue($this->languages));
     $language_manager->expects($this->any())
       ->method('getLanguageTypes')
-      ->will($this->returnValue(array(LanguageInterface::TYPE_INTERFACE)));
+      ->will($this->returnValue([LanguageInterface::TYPE_INTERFACE]));
     $language_manager->expects($this->any())
       ->method('getNegotiationMethods')
       ->will($this->returnValue($method_definitions));
@@ -97,14 +97,14 @@ function testProcessInbound() {
       ->disableOriginalConstructor()
       ->getMock();
 
-    $system_path_map = array(
+    $system_path_map = [
       // Set up one proper alias that can be resolved to a system path.
-      array('/foo', NULL, '/user/1'),
+      ['/foo', NULL, '/user/1'],
       // Passing in anything else should return the same string.
-      array('/fr/foo', NULL, '/fr/foo'),
-      array('/fr', NULL, '/fr'),
-      array('/user/login', NULL, '/user/login'),
-    );
+      ['/fr/foo', NULL, '/fr/foo'],
+      ['/fr', NULL, '/fr'],
+      ['/user/login', NULL, '/user/login'],
+    ];
 
     $alias_manager->expects($this->any())
       ->method('getPathByAlias')
@@ -113,16 +113,16 @@ function testProcessInbound() {
     // Create a stub config factory with all config settings that will be checked
     // during this test.
     $config_factory_stub = $this->getConfigFactoryStub(
-      array(
-        'system.site' => array(
+      [
+        'system.site' => [
           'page.front' => '/user/login'
-        ),
-        'language.negotiation' => array(
-          'url' => array(
-            'prefixes' => array('fr' => 'fr'),
-          ),
-        ),
-      )
+        ],
+        'language.negotiation' => [
+          'url' => [
+            'prefixes' => ['fr' => 'fr'],
+          ],
+        ],
+      ]
     );
 
     // Create a language negotiator stub.
@@ -130,10 +130,10 @@ function testProcessInbound() {
       ->getMock();
     $negotiator->expects($this->any())
       ->method('getNegotiationMethods')
-      ->will($this->returnValue(array(LanguageNegotiationUrl::METHOD_ID => array(
+      ->will($this->returnValue([LanguageNegotiationUrl::METHOD_ID => [
         'class' => 'Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrl',
         'weight' => 9,
-        ))));
+        ]]));
     $method = new LanguageNegotiationUrl();
     $method->setConfig($config_factory_stub);
     $method->setLanguageManager($this->languageManager);
@@ -159,12 +159,12 @@ function testProcessInbound() {
     // First, test the processor manager with the processors in the incorrect
     // order. The alias processor will run before the language processor, meaning
     // aliases will not be found.
-    $priorities = array(
+    $priorities = [
       1000 => $alias_processor,
       500 => $decode_processor,
       300 => $front_processor,
       200 => $language_processor,
-    );
+    ];
 
     // Create the processor manager and add the processors.
     $processor_manager = new PathProcessorManager();
@@ -187,12 +187,12 @@ function testProcessInbound() {
     // Now create a new processor manager and add the processors, this time in
     // the correct order.
     $processor_manager = new PathProcessorManager();
-    $priorities = array(
+    $priorities = [
       1000 => $decode_processor,
       500 => $language_processor,
       300 => $front_processor,
       200 => $alias_processor,
-    );
+    ];
     foreach ($priorities as $priority => $processor) {
       $processor_manager->addInbound($processor, $priority);
     }
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
index fb1a442298531aaa8349e45a43b3ea3d51afddff..8d9cc52d3127d9bac20c70fdfa62eb9174a182a2 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
@@ -19,10 +19,10 @@ class ContextDefinitionTest extends UnitTestCase {
    * Very simple data provider.
    */
   public function providerGetDataDefinition() {
-    return array(
-      array(TRUE),
-      array(FALSE),
-    );
+    return [
+      [TRUE],
+      [FALSE],
+    ];
   }
 
   /**
@@ -33,13 +33,13 @@ public function providerGetDataDefinition() {
   public function testGetDataDefinition($is_multiple) {
     $data_type = 'valid';
     $mock_data_definition = $this->getMockBuilder('\Drupal\Core\TypedData\ListDataDefinitionInterface')
-      ->setMethods(array(
+      ->setMethods([
         'setLabel',
         'setDescription',
         'setRequired',
         'getConstraints',
         'setConstraints',
-      ))
+      ])
       ->getMockForAbstractClass();
     $mock_data_definition->expects($this->once())
       ->method('setLabel')
@@ -52,7 +52,7 @@ public function testGetDataDefinition($is_multiple) {
       ->willReturnSelf();
     $mock_data_definition->expects($this->once())
       ->method('getConstraints')
-      ->willReturn(array());
+      ->willReturn([]);
     $mock_data_definition->expects($this->once())
       ->method('setConstraints')
       ->willReturn(NULL);
@@ -67,16 +67,16 @@ public function testGetDataDefinition($is_multiple) {
     // valid data type.
     $mock_data_manager->expects($this->once())
       ->method($create_definition_method)
-      ->willReturnMap(array(
-        array('not_valid', NULL),
-        array('valid', $mock_data_definition),
-      ));
+      ->willReturnMap([
+        ['not_valid', NULL],
+        ['valid', $mock_data_definition],
+      ]);
 
     // Mock a ContextDefinition object, setting up expectations for many of the
     // methods.
     $mock_context_definition = $this->getMockBuilder('Drupal\Core\Plugin\Context\ContextDefinition')
       ->disableOriginalConstructor()
-      ->setMethods(array(
+      ->setMethods([
         'isMultiple',
         'getTypedDataManager',
         'getDataType',
@@ -85,7 +85,7 @@ public function testGetDataDefinition($is_multiple) {
         'isRequired',
         'getConstraints',
         'setConstraints',
-      ))
+      ])
       ->getMock();
     $mock_context_definition->expects($this->once())
       ->method('isMultiple')
@@ -98,7 +98,7 @@ public function testGetDataDefinition($is_multiple) {
       ->willReturn($data_type);
     $mock_context_definition->expects($this->once())
       ->method('getConstraints')
-      ->willReturn(array());
+      ->willReturn([]);
 
     $this->assertSame(
       $mock_data_definition,
@@ -130,20 +130,20 @@ public function testGetDataDefinitionInvalidType($is_multiple) {
     // will eventually cause getDataDefinition() to throw an exception.
     $mock_data_manager->expects($this->once())
       ->method($create_definition_method)
-      ->willReturnMap(array(
-        array('not_valid', NULL),
-        array('valid', $mock_data_definition),
-      ));
+      ->willReturnMap([
+        ['not_valid', NULL],
+        ['valid', $mock_data_definition],
+      ]);
 
     // Mock a ContextDefinition object with expectations for only the methods
     // that will be called before the expected exception.
     $mock_context_definition = $this->getMockBuilder('Drupal\Core\Plugin\Context\ContextDefinition')
       ->disableOriginalConstructor()
-      ->setMethods(array(
+      ->setMethods([
         'isMultiple',
         'getTypedDataManager',
         'getDataType',
-      ))
+      ])
       ->getMock();
     $mock_context_definition->expects($this->once())
       ->method('isMultiple')
@@ -165,16 +165,16 @@ public function testGetDataDefinitionInvalidType($is_multiple) {
    * Data provider for testGetConstraint
    */
   public function providerGetConstraint() {
-    return array(
-      array(NULL, array(), 'nonexistent_constraint_name'),
-      array(
+    return [
+      [NULL, [], 'nonexistent_constraint_name'],
+      [
         'not_null',
-        array(
+        [
           'constraint_name' => 'not_null',
-        ),
+        ],
         'constraint_name',
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -185,9 +185,9 @@ public function providerGetConstraint() {
   public function testGetConstraint($expected, $constraint_array, $constraint) {
     $mock_context_definition = $this->getMockBuilder('Drupal\Core\Plugin\Context\ContextDefinition')
       ->disableOriginalConstructor()
-      ->setMethods(array(
+      ->setMethods([
         'getConstraints',
-      ))
+      ])
       ->getMock();
     $mock_context_definition->expects($this->once())
       ->method('getConstraints')
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextTest.php b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextTest.php
index c0d750e0e294d2b497159362d6dc09382d3fb43c..e9b596438a0db2d5d8d4c634579afce1d07d6b79 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextTest.php
@@ -89,7 +89,7 @@ public function testNullDataValue() {
   public function testSetContextValueTypedData() {
 
     $this->contextDefinition = $this->getMockBuilder('Drupal\Core\Plugin\Context\ContextDefinitionInterface')
-      ->setMethods(array('getDefaultValue', 'getDataDefinition'))
+      ->setMethods(['getDefaultValue', 'getDataDefinition'])
       ->getMockForAbstractClass();
 
     $typed_data = $this->getMock('Drupal\Core\TypedData\TypedDataInterface');
@@ -144,7 +144,7 @@ protected function setUpDefaultValue($default_value = NULL) {
     $mock_data_definition = $this->getMock('Drupal\Core\TypedData\DataDefinitionInterface');
 
     $this->contextDefinition = $this->getMockBuilder('Drupal\Core\Plugin\Context\ContextDefinitionInterface')
-      ->setMethods(array('getDefaultValue', 'getDataDefinition'))
+      ->setMethods(['getDefaultValue', 'getDataDefinition'])
       ->getMockForAbstractClass();
 
     $this->contextDefinition->expects($this->once())
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextTypedDataTest.php b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextTypedDataTest.php
index dfc9361289b0ecb892782213f06f9f2cce974690..aac6efc0e3a7c8040edf90c514cc4f517564a2c7 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextTypedDataTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextTypedDataTest.php
@@ -38,7 +38,7 @@ public function testGetContextValue() {
     $typed_data_manager = $this->getMock(TypedDataManagerInterface::class);
     $typed_data_manager->expects($this->once())
       ->method('getCanonicalRepresentation')
-      ->will($this->returnCallback(array($this, 'getCanonicalRepresentation')));
+      ->will($this->returnCallback([$this, 'getCanonicalRepresentation']));
     $container = new ContainerBuilder();
     $container->set('typed_data_manager', $typed_data_manager);
     \Drupal::setContainer($container);
diff --git a/core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php b/core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php
index 981f4c2283466e5c15bdd71a9344f246353830fe..b0b43bb7bef017e8e88901d273feec100c6eb206 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php
@@ -62,7 +62,7 @@ public function providerTestCheckRequirements() {
       ->will($this->returnValue(new ContextDefinition('empty')));
 
     $requirement_specific = new ContextDefinition('specific');
-    $requirement_specific->setConstraints(array('bar' => 'baz'));
+    $requirement_specific->setConstraints(['bar' => 'baz']);
 
     $context_constraint_mismatch = $this->getMock('Drupal\Core\Plugin\Context\ContextInterface');
     $context_constraint_mismatch->expects($this->atLeastOnce())
@@ -74,21 +74,21 @@ public function providerTestCheckRequirements() {
       ->will($this->returnValue(new ContextDefinition('fuzzy')));
 
     $context_definition_specific = new ContextDefinition('specific');
-    $context_definition_specific->setConstraints(array('bar' => 'baz'));
+    $context_definition_specific->setConstraints(['bar' => 'baz']);
     $context_specific = $this->getMock('Drupal\Core\Plugin\Context\ContextInterface');
     $context_specific->expects($this->atLeastOnce())
       ->method('getContextDefinition')
       ->will($this->returnValue($context_definition_specific));
 
-    $data = array();
-    $data[] = array(array(), array(), TRUE);
-    $data[] = array(array(), array($requirement_any), FALSE);
-    $data[] = array(array(), array($requirement_optional), TRUE);
-    $data[] = array(array(), array($requirement_any, $requirement_optional), FALSE);
-    $data[] = array(array($context_any), array($requirement_any), TRUE);
-    $data[] = array(array($context_constraint_mismatch), array($requirement_specific), FALSE);
-    $data[] = array(array($context_datatype_mismatch), array($requirement_specific), FALSE);
-    $data[] = array(array($context_specific), array($requirement_specific), TRUE);
+    $data = [];
+    $data[] = [[], [], TRUE];
+    $data[] = [[], [$requirement_any], FALSE];
+    $data[] = [[], [$requirement_optional], TRUE];
+    $data[] = [[], [$requirement_any, $requirement_optional], FALSE];
+    $data[] = [[$context_any], [$requirement_any], TRUE];
+    $data[] = [[$context_constraint_mismatch], [$requirement_specific], FALSE];
+    $data[] = [[$context_datatype_mismatch], [$requirement_specific], FALSE];
+    $data[] = [[$context_specific], [$requirement_specific], TRUE];
 
     return $data;
   }
@@ -112,7 +112,7 @@ public function providerTestGetMatchingContexts() {
     $requirement_any = new ContextDefinition();
 
     $requirement_specific = new ContextDefinition('specific');
-    $requirement_specific->setConstraints(array('bar' => 'baz'));
+    $requirement_specific->setConstraints(['bar' => 'baz']);
 
     $context_any = $this->getMock('Drupal\Core\Plugin\Context\ContextInterface');
     $context_any->expects($this->atLeastOnce())
@@ -127,24 +127,24 @@ public function providerTestGetMatchingContexts() {
       ->method('getContextDefinition')
       ->will($this->returnValue(new ContextDefinition('fuzzy')));
     $context_definition_specific = new ContextDefinition('specific');
-    $context_definition_specific->setConstraints(array('bar' => 'baz'));
+    $context_definition_specific->setConstraints(['bar' => 'baz']);
     $context_specific = $this->getMock('Drupal\Core\Plugin\Context\ContextInterface');
     $context_specific->expects($this->atLeastOnce())
       ->method('getContextDefinition')
       ->will($this->returnValue($context_definition_specific));
 
-    $data = array();
+    $data = [];
     // No context will return no valid contexts.
-    $data[] = array(array(), $requirement_any);
+    $data[] = [[], $requirement_any];
     // A context with a generic matching requirement is valid.
-    $data[] = array(array($context_any), $requirement_any);
+    $data[] = [[$context_any], $requirement_any];
     // A context with a specific matching requirement is valid.
-    $data[] = array(array($context_specific), $requirement_specific);
+    $data[] = [[$context_specific], $requirement_specific];
 
     // A context with a mismatched constraint is invalid.
-    $data[] = array(array($context_constraint_mismatch), $requirement_specific, array());
+    $data[] = [[$context_constraint_mismatch], $requirement_specific, []];
     // A context with a mismatched datatype is invalid.
-    $data[] = array(array($context_datatype_mismatch), $requirement_specific, array());
+    $data[] = [[$context_datatype_mismatch], $requirement_specific, []];
 
     return $data;
   }
@@ -157,14 +157,14 @@ public function providerTestGetMatchingContexts() {
   public function testFilterPluginDefinitionsByContexts($has_context, $definitions, $expected) {
     if ($has_context) {
       $context = $this->getMock('Drupal\Core\Plugin\Context\ContextInterface');
-      $expected_context_definition = (new ContextDefinition('expected_data_type'))->setConstraints(array('expected_constraint_name' => 'expected_constraint_value'));
+      $expected_context_definition = (new ContextDefinition('expected_data_type'))->setConstraints(['expected_constraint_name' => 'expected_constraint_value']);
       $context->expects($this->atLeastOnce())
         ->method('getContextDefinition')
         ->will($this->returnValue($expected_context_definition));
-      $contexts = array($context);
+      $contexts = [$context];
     }
     else {
-      $contexts = array();
+      $contexts = [];
     }
 
     $this->assertSame($expected, $this->contextHandler->filterPluginDefinitionsByContexts($contexts, $definitions));
@@ -174,55 +174,55 @@ public function testFilterPluginDefinitionsByContexts($has_context, $definitions
    * Provides data for testFilterPluginDefinitionsByContexts().
    */
   public function providerTestFilterPluginDefinitionsByContexts() {
-    $data = array();
+    $data = [];
 
-    $plugins = array();
+    $plugins = [];
     // No context and no plugins, no plugins available.
-    $data[] = array(FALSE, $plugins, array());
+    $data[] = [FALSE, $plugins, []];
 
-    $plugins = array('expected_plugin' => array());
+    $plugins = ['expected_plugin' => []];
     // No context, all plugins available.
-    $data[] = array(FALSE, $plugins, $plugins);
+    $data[] = [FALSE, $plugins, $plugins];
 
-    $plugins = array('expected_plugin' => array('context' => array()));
+    $plugins = ['expected_plugin' => ['context' => []]];
     // No context, all plugins available.
-    $data[] = array(FALSE, $plugins, $plugins);
+    $data[] = [FALSE, $plugins, $plugins];
 
-    $plugins = array('expected_plugin' => array('context' => array('context1' => new ContextDefinition('expected_data_type'))));
+    $plugins = ['expected_plugin' => ['context' => ['context1' => new ContextDefinition('expected_data_type')]]];
     // Missing context, no plugins available.
-    $data[] = array(FALSE, $plugins, array());
+    $data[] = [FALSE, $plugins, []];
     // Satisfied context, all plugins available.
-    $data[] = array(TRUE, $plugins, $plugins);
+    $data[] = [TRUE, $plugins, $plugins];
 
-    $mismatched_context_definition = (new ContextDefinition('expected_data_type'))->setConstraints(array('mismatched_constraint_name' => 'mismatched_constraint_value'));
-    $plugins = array('expected_plugin' => array('context' => array('context1' => $mismatched_context_definition)));
+    $mismatched_context_definition = (new ContextDefinition('expected_data_type'))->setConstraints(['mismatched_constraint_name' => 'mismatched_constraint_value']);
+    $plugins = ['expected_plugin' => ['context' => ['context1' => $mismatched_context_definition]]];
     // Mismatched constraints, no plugins available.
-    $data[] = array(TRUE, $plugins, array());
+    $data[] = [TRUE, $plugins, []];
 
     $optional_mismatched_context_definition = clone $mismatched_context_definition;
     $optional_mismatched_context_definition->setRequired(FALSE);
-    $plugins = array('expected_plugin' => array('context' => array('context1' => $optional_mismatched_context_definition)));
+    $plugins = ['expected_plugin' => ['context' => ['context1' => $optional_mismatched_context_definition]]];
     // Optional mismatched constraint, all plugins available.
-    $data[] = array(FALSE, $plugins, $plugins);
+    $data[] = [FALSE, $plugins, $plugins];
 
-    $expected_context_definition = (new ContextDefinition('expected_data_type'))->setConstraints(array('expected_constraint_name' => 'expected_constraint_value'));
-    $plugins = array('expected_plugin' => array('context' => array('context1' => $expected_context_definition)));
+    $expected_context_definition = (new ContextDefinition('expected_data_type'))->setConstraints(['expected_constraint_name' => 'expected_constraint_value']);
+    $plugins = ['expected_plugin' => ['context' => ['context1' => $expected_context_definition]]];
     // Satisfied context with constraint, all plugins available.
-    $data[] = array(TRUE, $plugins, $plugins);
+    $data[] = [TRUE, $plugins, $plugins];
 
     $optional_expected_context_definition = clone $expected_context_definition;
     $optional_expected_context_definition->setRequired(FALSE);
-    $plugins = array('expected_plugin' => array('context' => array('context1' => $optional_expected_context_definition)));
+    $plugins = ['expected_plugin' => ['context' => ['context1' => $optional_expected_context_definition]]];
     // Optional unsatisfied context, all plugins available.
-    $data[] = array(FALSE, $plugins, $plugins);
+    $data[] = [FALSE, $plugins, $plugins];
 
-    $unexpected_context_definition = (new ContextDefinition('unexpected_data_type'))->setConstraints(array('mismatched_constraint_name' => 'mismatched_constraint_value'));
-    $plugins = array(
-      'unexpected_plugin' => array('context' => array('context1' => $unexpected_context_definition)),
-      'expected_plugin' => array('context' => array('context2' => new ContextDefinition('expected_data_type'))),
-    );
+    $unexpected_context_definition = (new ContextDefinition('unexpected_data_type'))->setConstraints(['mismatched_constraint_name' => 'mismatched_constraint_value']);
+    $plugins = [
+      'unexpected_plugin' => ['context' => ['context1' => $unexpected_context_definition]],
+      'expected_plugin' => ['context' => ['context2' => new ContextDefinition('expected_data_type')]],
+    ];
     // Context only satisfies one plugin.
-    $data[] = array(TRUE, $plugins, array('expected_plugin' => $plugins['expected_plugin']));
+    $data[] = [TRUE, $plugins, ['expected_plugin' => $plugins['expected_plugin']]];
 
     return $data;
   }
@@ -246,10 +246,10 @@ public function testApplyContextMapping() {
     $context_miss->expects($this->never())
       ->method('getContextData');
 
-    $contexts = array(
+    $contexts = [
       'hit' => $context_hit,
       'miss' => $context_miss,
-    );
+    ];
 
     $context_definition = $this->getMock('Drupal\Core\Plugin\Context\ContextDefinitionInterface');
 
@@ -259,7 +259,7 @@ public function testApplyContextMapping() {
       ->willReturn([]);
     $plugin->expects($this->once())
       ->method('getContextDefinitions')
-      ->will($this->returnValue(array('hit' => $context_definition)));
+      ->will($this->returnValue(['hit' => $context_definition]));
     $plugin->expects($this->once())
       ->method('setContextValue')
       ->with('hit', $context_hit_data);
@@ -288,9 +288,9 @@ public function testApplyContextMappingMissingRequired() {
     $context->expects($this->never())
       ->method('getContextValue');
 
-    $contexts = array(
+    $contexts = [
       'name' => $context,
-    );
+    ];
 
     $context_definition = $this->getMock('Drupal\Core\Plugin\Context\ContextDefinitionInterface');
     $context_definition->expects($this->atLeastOnce())
@@ -303,7 +303,7 @@ public function testApplyContextMappingMissingRequired() {
       ->willReturn([]);
     $plugin->expects($this->once())
       ->method('getContextDefinitions')
-      ->will($this->returnValue(array('hit' => $context_definition)));
+      ->will($this->returnValue(['hit' => $context_definition]));
     $plugin->expects($this->never())
       ->method('setContextValue');
 
@@ -322,9 +322,9 @@ public function testApplyContextMappingMissingNotRequired() {
     $context->expects($this->never())
       ->method('getContextValue');
 
-    $contexts = array(
+    $contexts = [
       'name' => $context,
-    );
+    ];
 
     $context_definition = $this->getMock('Drupal\Core\Plugin\Context\ContextDefinitionInterface');
     $context_definition->expects($this->atLeastOnce())
@@ -337,7 +337,7 @@ public function testApplyContextMappingMissingNotRequired() {
       ->willReturn(['optional' => 'missing']);
     $plugin->expects($this->once())
       ->method('getContextDefinitions')
-      ->will($this->returnValue(array('optional' => $context_definition)));
+      ->will($this->returnValue(['optional' => $context_definition]));
     $plugin->expects($this->never())
       ->method('setContextValue');
 
@@ -362,9 +362,9 @@ public function testApplyContextMappingNoValueRequired() {
       ->method('hasContextValue')
       ->willReturn(FALSE);
 
-    $contexts = array(
+    $contexts = [
       'hit' => $context,
-    );
+    ];
 
     $context_definition = $this->getMock('Drupal\Core\Plugin\Context\ContextDefinitionInterface');
     $context_definition->expects($this->atLeastOnce())
@@ -377,7 +377,7 @@ public function testApplyContextMappingNoValueRequired() {
       ->willReturn([]);
     $plugin->expects($this->once())
       ->method('getContextDefinitions')
-      ->will($this->returnValue(array('hit' => $context_definition)));
+      ->will($this->returnValue(['hit' => $context_definition]));
     $plugin->expects($this->never())
       ->method('setContextValue');
 
@@ -396,9 +396,9 @@ public function testApplyContextMappingNoValueNonRequired() {
       ->method('hasContextValue')
       ->willReturn(FALSE);
 
-    $contexts = array(
+    $contexts = [
       'hit' => $context,
-    );
+    ];
 
     $context_definition = $this->getMock('Drupal\Core\Plugin\Context\ContextDefinitionInterface');
     $context_definition->expects($this->atLeastOnce())
@@ -411,7 +411,7 @@ public function testApplyContextMappingNoValueNonRequired() {
       ->willReturn([]);
     $plugin->expects($this->once())
       ->method('getContextDefinitions')
-      ->will($this->returnValue(array('hit' => $context_definition)));
+      ->will($this->returnValue(['hit' => $context_definition]));
     $plugin->expects($this->never())
       ->method('setContextValue');
 
@@ -432,9 +432,9 @@ public function testApplyContextMappingConfigurableAssigned() {
       ->method('hasContextValue')
       ->willReturn(TRUE);
 
-    $contexts = array(
+    $contexts = [
       'name' => $context,
-    );
+    ];
 
     $context_definition = $this->getMock('Drupal\Core\Plugin\Context\ContextDefinitionInterface');
 
@@ -444,7 +444,7 @@ public function testApplyContextMappingConfigurableAssigned() {
       ->willReturn([]);
     $plugin->expects($this->once())
       ->method('getContextDefinitions')
-      ->will($this->returnValue(array('hit' => $context_definition)));
+      ->will($this->returnValue(['hit' => $context_definition]));
     $plugin->expects($this->once())
       ->method('setContextValue')
       ->with('hit', $context_data);
@@ -473,9 +473,9 @@ public function testApplyContextMappingConfigurableAssignedMiss() {
     $context->expects($this->never())
       ->method('getContextValue');
 
-    $contexts = array(
+    $contexts = [
       'name' => $context,
-    );
+    ];
 
     $context_definition = $this->getMock('Drupal\Core\Plugin\Context\ContextDefinitionInterface');
 
@@ -485,7 +485,7 @@ public function testApplyContextMappingConfigurableAssignedMiss() {
       ->willReturn([]);
     $plugin->expects($this->once())
       ->method('getContextDefinitions')
-      ->will($this->returnValue(array('hit' => $context_definition)));
+      ->will($this->returnValue(['hit' => $context_definition]));
     $plugin->expects($this->never())
       ->method('setContextValue');
 
diff --git a/core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php b/core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php
index fbd6bc29fff7510470e3fadee525cfb145d1036c..11efd4821c0fcbf5ebadae79626ef89689dac6be 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php
@@ -58,12 +58,12 @@ public function testGetNotExistingPlugin() {
    *   The test data.
    */
   public function providerTestSortHelper() {
-    return array(
-      array('apple', 'apple', 0),
-      array('apple', 'cherry', -1),
-      array('cherry', 'apple', 1),
-      array('cherry', 'banana', 1),
-    );
+    return [
+      ['apple', 'apple', 0],
+      ['apple', 'cherry', -1],
+      ['cherry', 'apple', 1],
+      ['cherry', 'banana', 1],
+    ];
   }
 
   /**
@@ -91,7 +91,7 @@ public function testSortHelper($plugin_id_1, $plugin_id_2, $expected) {
   public function testGetConfiguration() {
     $this->setupPluginCollection($this->exactly(3));
     // The expected order matches $this->config.
-    $expected = array('banana', 'cherry', 'apple');
+    $expected = ['banana', 'cherry', 'apple'];
 
     $config = $this->defaultPluginCollection->getConfiguration();
     $this->assertSame($expected, array_keys($config), 'The order of the configuration is unchanged.');
@@ -113,21 +113,21 @@ public function testGetConfiguration() {
    */
   public function testAddInstanceId() {
     $this->setupPluginCollection($this->exactly(4));
-    $expected = array(
+    $expected = [
       'banana' => 'banana',
       'cherry' => 'cherry',
       'apple' => 'apple',
-    );
+    ];
     $this->defaultPluginCollection->addInstanceId('apple');
     $result = $this->defaultPluginCollection->getInstanceIds();
     $this->assertSame($expected, $result);
     $this->assertSame($expected, array_intersect_key($result, $this->defaultPluginCollection->getConfiguration()));
 
-    $expected = array(
+    $expected = [
       'cherry' => 'cherry',
       'apple' => 'apple',
       'banana' => 'banana',
-    );
+    ];
     $this->defaultPluginCollection->removeInstanceId('banana');
     $this->defaultPluginCollection->addInstanceId('banana', $this->config['banana']);
 
@@ -151,11 +151,11 @@ public function testRemoveInstanceId() {
    */
   public function testSetInstanceConfiguration() {
     $this->setupPluginCollection($this->exactly(3));
-    $expected = array(
+    $expected = [
       'id' => 'cherry',
       'key' => 'value',
       'custom' => 'bananas',
-    );
+    ];
     $this->defaultPluginCollection->setInstanceConfiguration('cherry', $expected);
     $config = $this->defaultPluginCollection->getConfiguration();
     $this->assertSame($expected, $config['cherry']);
@@ -189,12 +189,12 @@ public function testSet() {
     $this->defaultPluginCollection->set('cherry2', $instance);
     $this->defaultPluginCollection->setInstanceConfiguration('cherry2', $this->config['cherry']);
 
-    $expected = array(
+    $expected = [
       'banana',
       'cherry',
       'apple',
       'cherry2',
-    );
+    ];
     $config = $this->defaultPluginCollection->getConfiguration();
     $this->assertSame($expected, array_keys($config));
   }
diff --git a/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php b/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
index 0a6e8d4c8717385cfab9b890d3d5a1c07e55610d..7e2842ec44ea055e990e699fc8420b65f84c6a31 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
@@ -35,27 +35,27 @@ class DefaultPluginManagerTest extends UnitTestCase {
    * {@inheritdoc}
    */
   protected function setUp() {
-    $this->expectedDefinitions = array(
-      'apple' => array(
+    $this->expectedDefinitions = [
+      'apple' => [
         'id' => 'apple',
         'label' => 'Apple',
         'color' => 'green',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Apple',
-      ),
-      'banana' => array(
+      ],
+      'banana' => [
         'id' => 'banana',
         'label' => 'Banana',
         'color' => 'yellow',
-        'uses' => array(
+        'uses' => [
           'bread' => 'Banana bread',
-          'loaf' => array(
+          'loaf' => [
             'singular' => '@count loaf',
             'plural' => '@count loaves',
-          ),
-        ),
+          ],
+        ],
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Banana',
-      ),
-    );
+      ],
+    ];
 
     $this->namespaces = new \ArrayObject();
     $this->namespaces['Drupal\plugin_test'] = $this->root . '/core/modules/system/tests/modules/plugin_test/src';
@@ -65,14 +65,14 @@ protected function setUp() {
    * Tests the plugin manager with a plugin that extends a non-installed class.
    */
   public function testDefaultPluginManagerWithPluginExtendingNonInstalledClass() {
-    $definitions = array();
-    $definitions['extending_non_installed_class'] = array(
+    $definitions = [];
+    $definitions['extending_non_installed_class'] = [
       'id' => 'extending_non_installed_class',
       'label' => 'A plugin whose class is extending from a non-installed module class',
       'color' => 'pink',
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\ExtendingNonInstalledClass',
       'provider' => 'plugin_test',
-    );
+    ];
 
     $module_handler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
     $plugin_manager = new TestPluginManager($this->namespaces, $definitions, $module_handler, 'test_alter_hook', '\Drupal\plugin_test\Plugin\plugin_test\fruit\FruitInterface');
@@ -85,13 +85,13 @@ public function testDefaultPluginManagerWithPluginExtendingNonInstalledClass() {
    */
   public function testDefaultPluginManagerWithDisabledModule() {
     $definitions = $this->expectedDefinitions;
-    $definitions['cherry'] = array(
+    $definitions['cherry'] = [
       'id' => 'cherry',
       'label' => 'Cherry',
       'color' => 'red',
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Cherry',
       'provider' => 'disabled_module',
-    );
+    ];
 
     $module_handler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
 
@@ -110,13 +110,13 @@ public function testDefaultPluginManagerWithDisabledModule() {
    */
   public function testDefaultPluginManagerWithObjects() {
     $definitions = $this->expectedDefinitions;
-    $definitions['cherry'] = (object) array(
+    $definitions['cherry'] = (object) [
       'id' => 'cherry',
       'label' => 'Cherry',
       'color' => 'red',
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Cherry',
       'provider' => 'disabled_module',
-    );
+    ];
 
     $module_handler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
 
@@ -196,7 +196,7 @@ public function testDefaultPluginManagerWithFilledCache() {
       ->expects($this->once())
       ->method('get')
       ->with($cid)
-      ->will($this->returnValue((object) array('data' => $this->expectedDefinitions)));
+      ->will($this->returnValue((object) ['data' => $this->expectedDefinitions]));
     $cache_backend
       ->expects($this->never())
       ->method('set');
@@ -241,7 +241,7 @@ public function testCacheClearWithTags() {
     $cache_tags_invalidator
       ->expects($this->once())
       ->method('invalidateTags')
-      ->with(array('tag'));
+      ->with(['tag']);
     $cache_backend
       ->expects($this->never())
       ->method('deleteMultiple');
@@ -249,7 +249,7 @@ public function testCacheClearWithTags() {
     $this->getContainerWithCacheTagsInvalidator($cache_tags_invalidator);
 
     $plugin_manager = new TestPluginManager($this->namespaces, $this->expectedDefinitions, NULL, NULL, '\Drupal\plugin_test\Plugin\plugin_test\fruit\FruitInterface');
-    $plugin_manager->setCacheBackend($cache_backend, $cid, array('tag'));
+    $plugin_manager->setCacheBackend($cache_backend, $cid, ['tag']);
 
     $plugin_manager->clearCachedDefinitions();
   }
@@ -283,13 +283,13 @@ public function testCreateInstanceWithInvalidInterfaces() {
       ->with('plugin_test')
       ->willReturn(TRUE);
 
-    $this->expectedDefinitions['kale'] = array(
+    $this->expectedDefinitions['kale'] = [
       'id' => 'kale',
       'label' => 'Kale',
       'color' => 'green',
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Kale',
       'provider' => 'plugin_test',
-    );
+    ];
     $this->expectedDefinitions['apple']['provider'] = 'plugin_test';
     $this->expectedDefinitions['banana']['provider'] = 'plugin_test';
 
@@ -310,13 +310,13 @@ public function testGetDefinitionsWithoutRequiredInterface() {
       ->with('plugin_test')
       ->willReturn(FALSE);
 
-    $this->expectedDefinitions['kale'] = array(
+    $this->expectedDefinitions['kale'] = [
       'id' => 'kale',
       'label' => 'Kale',
       'color' => 'green',
       'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Kale',
       'provider' => 'plugin_test',
-    );
+    ];
     $this->expectedDefinitions['apple']['provider'] = 'plugin_test';
     $this->expectedDefinitions['banana']['provider'] = 'plugin_test';
 
diff --git a/core/tests/Drupal/Tests/Core/Plugin/DefaultSingleLazyPluginCollectionTest.php b/core/tests/Drupal/Tests/Core/Plugin/DefaultSingleLazyPluginCollectionTest.php
index ab7bfdc1dbf5ece960fefafc2ad731a902651eb1..21bbde83d8ae8d53e667cd8cbf80e4503454a011 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/DefaultSingleLazyPluginCollectionTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/DefaultSingleLazyPluginCollectionTest.php
@@ -27,7 +27,7 @@ protected function setupPluginCollection(\PHPUnit_Framework_MockObject_Matcher_I
         return $this->pluginInstances[$id];
       });
 
-    $this->defaultPluginCollection = new DefaultSingleLazyPluginCollection($this->pluginManager, 'apple', array('id' => 'apple', 'key' => 'value'));
+    $this->defaultPluginCollection = new DefaultSingleLazyPluginCollection($this->pluginManager, 'apple', ['id' => 'apple', 'key' => 'value']);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Discovery/ContainerDerivativeDiscoveryDecoratorTest.php b/core/tests/Drupal/Tests/Core/Plugin/Discovery/ContainerDerivativeDiscoveryDecoratorTest.php
index 480e11511441e6c69cf1230be32538c3f6a0c95e..508fdc61e826b67ddc7f9cd993855eb7a096bba6 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Discovery/ContainerDerivativeDiscoveryDecoratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Discovery/ContainerDerivativeDiscoveryDecoratorTest.php
@@ -17,7 +17,7 @@ class ContainerDerivativeDiscoveryDecoratorTest extends UnitTestCase {
   public function testGetDefinitions() {
     $example_service = $this->getMock('Symfony\Component\EventDispatcher\EventDispatcherInterface');
     $example_container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerBuilder')
-      ->setMethods(array('get'))
+      ->setMethods(['get'])
       ->getMock();
     $example_container->expects($this->once())
       ->method('get')
@@ -26,15 +26,15 @@ public function testGetDefinitions() {
 
     \Drupal::setContainer($example_container);
 
-    $definitions = array();
-    $definitions['container_aware_discovery'] = array(
+    $definitions = [];
+    $definitions['container_aware_discovery'] = [
       'id' => 'container_aware_discovery',
       'deriver' => '\Drupal\Tests\Core\Plugin\Discovery\TestContainerDerivativeDiscovery',
-    );
-    $definitions['non_container_aware_discovery'] = array(
+    ];
+    $definitions['non_container_aware_discovery'] = [
       'id' => 'non_container_aware_discovery',
       'deriver' => '\Drupal\Tests\Core\Plugin\Discovery\TestDerivativeDiscovery',
-    );
+    ];
 
     $discovery_main = $this->getMock('Drupal\Component\Plugin\Discovery\DiscoveryInterface');
     $discovery_main->expects($this->any())
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Discovery/DerivativeDiscoveryDecoratorTest.php b/core/tests/Drupal/Tests/Core/Plugin/Discovery/DerivativeDiscoveryDecoratorTest.php
index 1e96458342c68468779b1cbe51da49d7128bec6c..81e7d56a80442087c3ee16ed8c917002e64d6f9c 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Discovery/DerivativeDiscoveryDecoratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Discovery/DerivativeDiscoveryDecoratorTest.php
@@ -36,11 +36,11 @@ protected function setUp() {
    * @see \Drupal\Component\Plugin\Discovery\DerivativeDiscoveryDecorator::getDerivativeFetcher()
    */
   public function testGetDerivativeFetcher() {
-    $definitions = array();
-    $definitions['non_container_aware_discovery'] = array(
+    $definitions = [];
+    $definitions['non_container_aware_discovery'] = [
       'id' => 'non_container_aware_discovery',
       'deriver' => '\Drupal\Tests\Core\Plugin\Discovery\TestDerivativeDiscovery',
-    );
+    ];
 
     $this->discoveryMain->expects($this->any())
       ->method('getDefinitions')
@@ -62,11 +62,11 @@ public function testGetDerivativeFetcher() {
    * Tests the getDerivativeFetcher method with objects instead of arrays.
    */
   public function testGetDerivativeFetcherWithAnnotationObjects() {
-    $definitions = array();
-    $definitions['non_container_aware_discovery'] = (object) array(
+    $definitions = [];
+    $definitions['non_container_aware_discovery'] = (object) [
       'id' => 'non_container_aware_discovery',
       'deriver' => '\Drupal\Tests\Core\Plugin\Discovery\TestDerivativeDiscoveryWithObject',
-    );
+    ];
 
     $this->discoveryMain->expects($this->any())
       ->method('getDefinitions')
@@ -92,7 +92,7 @@ public function testGetDerivativeFetcherWithAnnotationObjects() {
    * @covers ::getDeriverClass
    */
   public function testGetDeriverClassWithClassedDefinitions() {
-    $definitions = array();
+    $definitions = [];
     $definition = $this->prophesize(DerivablePluginDefinitionInterface::class);
     $definition->id()->willReturn('non_container_aware_discovery');
     $definition->getDeriver()->willReturn(TestDerivativeDiscoveryWithObject::class);
@@ -139,12 +139,12 @@ public function testGetDeriverClassWithInvalidClassedDefinitions() {
    * @expectedExceptionMessage Plugin (non_existent_discovery) deriver "\Drupal\system\Tests\Plugin\NonExistentDeriver" does not exist.
    */
   public function testNonExistentDerivativeFetcher() {
-    $definitions = array();
+    $definitions = [];
     // Do this with a class that doesn't exist.
-    $definitions['non_existent_discovery'] = array(
+    $definitions['non_existent_discovery'] = [
       'id' => 'non_existent_discovery',
       'deriver' => '\Drupal\system\Tests\Plugin\NonExistentDeriver',
-    );
+    ];
     $this->discoveryMain->expects($this->any())
       ->method('getDefinitions')
       ->will($this->returnValue($definitions));
@@ -162,12 +162,12 @@ public function testNonExistentDerivativeFetcher() {
    * @expectedExceptionMessage Plugin (invalid_discovery) deriver "\Drupal\KernelTests\Core\Plugin\DerivativeTest" must implement \Drupal\Component\Plugin\Derivative\DeriverInterface.
    */
   public function testInvalidDerivativeFetcher() {
-    $definitions = array();
+    $definitions = [];
     // Do this with a class that doesn't implement the interface.
-    $definitions['invalid_discovery'] = array(
+    $definitions['invalid_discovery'] = [
       'id' => 'invalid_discovery',
       'deriver' => '\Drupal\KernelTests\Core\Plugin\DerivativeTest',
-    );
+    ];
     $this->discoveryMain->expects($this->any())
       ->method('getDefinitions')
       ->will($this->returnValue($definitions));
@@ -180,26 +180,26 @@ public function testInvalidDerivativeFetcher() {
    * Tests derivative definitions when a definition already exists.
    */
   public function testExistingDerivative() {
-    $definitions = array();
-    $definitions['non_container_aware_discovery'] = array(
+    $definitions = [];
+    $definitions['non_container_aware_discovery'] = [
       'id' => 'non_container_aware_discovery',
       'deriver' => '\Drupal\Tests\Core\Plugin\Discovery\TestDerivativeDiscovery',
       'string' => 'string',
       'empty_string' => 'not_empty',
-      'array' => array('one', 'two'),
-      'empty_array' => array('three'),
+      'array' => ['one', 'two'],
+      'empty_array' => ['three'],
       'null_value' => TRUE,
-    );
+    ];
     // This will clash with a derivative id.
     // @see \Drupal\Tests\Core\Plugin\Discovery\TestDerivativeDiscovery
-    $definitions['non_container_aware_discovery:test_discovery_1'] = array(
+    $definitions['non_container_aware_discovery:test_discovery_1'] = [
       'id' => 'non_container_aware_discovery:test_discovery_1',
       'string' => 'string',
       'empty_string' => '',
-      'array' => array('one', 'two'),
-      'empty_array' => array(),
+      'array' => ['one', 'two'],
+      'empty_array' => [],
       'null_value' => NULL,
-    );
+    ];
 
     $this->discoveryMain->expects($this->any())
       ->method('getDefinitions')
@@ -220,25 +220,25 @@ public function testExistingDerivative() {
    * Tests a single definition when a derivative already exists.
    */
   public function testSingleExistingDerivative() {
-    $base_definition = array(
+    $base_definition = [
       'id' => 'non_container_aware_discovery',
       'deriver' => '\Drupal\Tests\Core\Plugin\Discovery\TestDerivativeDiscovery',
       'string' => 'string',
       'empty_string' => 'not_empty',
-      'array' => array('one', 'two'),
-      'empty_array' => array('three'),
+      'array' => ['one', 'two'],
+      'empty_array' => ['three'],
       'null_value' => TRUE,
-    );
+    ];
     // This will clash with a derivative id.
     // @see \Drupal\Tests\Core\Plugin\Discovery\TestDerivativeDiscovery
-    $derivative_definition = array(
+    $derivative_definition = [
       'id' => 'non_container_aware_discovery:test_discovery_1',
       'string' => 'string',
       'empty_string' => '',
-      'array' => array('one', 'two'),
-      'empty_array' => array(),
+      'array' => ['one', 'two'],
+      'empty_array' => [],
       'null_value' => NULL,
-    );
+    ];
 
     $this->discoveryMain->expects($this->at(0))
       ->method('getDefinition')
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Discovery/HookDiscoveryTest.php b/core/tests/Drupal/Tests/Core/Plugin/Discovery/HookDiscoveryTest.php
index 1472dc0c4d571fcf6ad7baa32538edd1f34b3978..ab65ab723d59752f7d310942b0ef809fe7706844 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Discovery/HookDiscoveryTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Discovery/HookDiscoveryTest.php
@@ -42,7 +42,7 @@ public function testGetDefinitionsWithoutPlugins() {
     $this->moduleHandler->expects($this->once())
       ->method('getImplementations')
       ->with('test_plugin')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->assertCount(0, $this->hookDiscovery->getDefinitions());
   }
@@ -56,7 +56,7 @@ public function testGetDefinitions() {
     $this->moduleHandler->expects($this->once())
       ->method('getImplementations')
       ->with('test_plugin')
-      ->will($this->returnValue(array('hook_discovery_test', 'hook_discovery_test2')));
+      ->will($this->returnValue(['hook_discovery_test', 'hook_discovery_test2']));
 
     $this->moduleHandler->expects($this->at(1))
       ->method('invoke')
@@ -89,14 +89,14 @@ public function testGetDefinition() {
     $this->moduleHandler->expects($this->exactly(4))
       ->method('getImplementations')
       ->with('test_plugin')
-      ->will($this->returnValue(array('hook_discovery_test', 'hook_discovery_test2')));
+      ->will($this->returnValue(['hook_discovery_test', 'hook_discovery_test2']));
 
     $this->moduleHandler->expects($this->any())
       ->method('invoke')
-      ->will($this->returnValueMap(array(
-          array('hook_discovery_test', 'test_plugin', array(), $this->hookDiscoveryTestTestPlugin()),
-          array('hook_discovery_test2', 'test_plugin', array(), $this->hookDiscoveryTest2TestPlugin()),
-        )
+      ->will($this->returnValueMap([
+          ['hook_discovery_test', 'test_plugin', [], $this->hookDiscoveryTestTestPlugin()],
+          ['hook_discovery_test2', 'test_plugin', [], $this->hookDiscoveryTest2TestPlugin()],
+        ]
       ));
 
     $this->assertNull($this->hookDiscovery->getDefinition('test_non_existant', FALSE));
@@ -124,21 +124,21 @@ public function testGetDefinition() {
   public function testGetDefinitionWithUnknownID() {
     $this->moduleHandler->expects($this->once())
       ->method('getImplementations')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->hookDiscovery->getDefinition('test_non_existant', TRUE);
   }
 
   protected function hookDiscoveryTestTestPlugin() {
-    return array(
-      'test_id_1' => array('class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Apple'),
-      'test_id_2' => array('class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Orange'),
-    );
+    return [
+      'test_id_1' => ['class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Apple'],
+      'test_id_2' => ['class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Orange'],
+    ];
   }
   protected function hookDiscoveryTest2TestPlugin() {
-    return array(
-      'test_id_3' => array('class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Cherry'),
-    );
+    return [
+      'test_id_3' => ['class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Cherry'],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Discovery/TestDerivativeDiscovery.php b/core/tests/Drupal/Tests/Core/Plugin/Discovery/TestDerivativeDiscovery.php
index 2fb2f5deda79cc711c70f2b18034f775a43d9448..63f50d64c79691d8d00c563d28f87e69660088d4 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Discovery/TestDerivativeDiscovery.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Discovery/TestDerivativeDiscovery.php
@@ -21,7 +21,7 @@ public function getDerivativeDefinition($derivative_id, $base_plugin_definition)
    * {@inheritdoc}
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    $plugins = array();
+    $plugins = [];
     for ($i = 0; $i < 2; $i++) {
       $plugins['test_discovery_' . $i] = $base_plugin_definition;
     }
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Discovery/TestDerivativeDiscoveryWithObject.php b/core/tests/Drupal/Tests/Core/Plugin/Discovery/TestDerivativeDiscoveryWithObject.php
index 656415d6cefa57a221fbd4f30f16545d294eca36..353b21d48a4f3c1cda6613024b5cade2eb99436a 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Discovery/TestDerivativeDiscoveryWithObject.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Discovery/TestDerivativeDiscoveryWithObject.php
@@ -26,7 +26,7 @@ public function getDerivativeDefinition($derivative_id, $base_plugin_definition)
    * @return array
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    $plugins = array();
+    $plugins = [];
     for ($i = 0; $i < 2; $i++) {
       $plugins['test_discovery_' . $i] = $base_plugin_definition;
     }
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDirectoryDiscoveryTest.php b/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDirectoryDiscoveryTest.php
index 265374a6755ceaa73c9d93fc903b940c163576a6..a2c000e1fc6f984b3ea90326c84d079df0d36421 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDirectoryDiscoveryTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDirectoryDiscoveryTest.php
@@ -56,7 +56,7 @@ public function testGetDefinitions() {
     $this->assertCount(4, $definitions);
 
     foreach ($definitions as $id => $definition) {
-      foreach (array('id', 'provider', ComponentYamlDirectoryDiscovery::FILE_KEY) as $key) {
+      foreach (['id', 'provider', ComponentYamlDirectoryDiscovery::FILE_KEY] as $key) {
         $this->assertArrayHasKey($key, $definition);
       }
       $this->assertEquals($id, $definition['id']);
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDiscoveryDecoratorTest.php b/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDiscoveryDecoratorTest.php
index ee48654d97f30d16715614cede9e2b060f5b5285..ea1936856676c33a48f96846ea15fa1af4323b93 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDiscoveryDecoratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDiscoveryDecoratorTest.php
@@ -24,37 +24,37 @@ class YamlDiscoveryDecoratorTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $expectedKeys = array(
+  protected $expectedKeys = [
     'test_1' => 'test_1_a',
     'another_provider_1' => 'test_1_b',
     'another_provider_2' => 'test_2_a',
     'test_2' => 'test_2_b',
     'decorated_1' => 'decorated_test_1',
     'decorated_2' => 'decorated_test_2',
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
 
     $base_path = __DIR__ . '/Fixtures';
     // Set up the directories to search.
-    $directories = array(
+    $directories = [
       'test_1' => $base_path . '/test_1',
       'test_2' => $base_path . '/test_2',
-    );
+    ];
 
-    $definitions = array(
-      'decorated_test_1' => array(
+    $definitions = [
+      'decorated_test_1' => [
         'id' => 'decorated_test_1',
         'name' => 'Decorated test 1',
         'provider' => 'decorated_1',
-      ),
-      'decorated_test_2' => array(
+      ],
+      'decorated_test_2' => [
         'id' => 'decorated_test_2',
         'name' => 'Decorated test 1',
         'provider' => 'decorated_2',
-      ),
-    );
+      ],
+    ];
 
     $decorated = $this->getMock('Drupal\Component\Plugin\Discovery\DiscoveryInterface');
     $decorated->expects($this->once())
@@ -78,7 +78,7 @@ public function testGetDefinitions() {
     }
 
     foreach ($definitions as $id => $definition) {
-      foreach (array('name', 'id', 'provider') as $key) {
+      foreach (['name', 'id', 'provider'] as $key) {
         $this->assertArrayHasKey($key, $definition);
       }
       $this->assertEquals($id, $definition['id']);
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDiscoveryTest.php b/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDiscoveryTest.php
index 0335145ce24cd8aed87a51dd1ba49e5f8cb220e6..096c33fc73fc1b5c3bda32506eed5ed5db704ee0 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDiscoveryTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Discovery/YamlDiscoveryTest.php
@@ -25,22 +25,22 @@ class YamlDiscoveryTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $expectedKeys = array(
+  protected $expectedKeys = [
     'test_1' => 'test_1_a',
     'another_provider_1' => 'test_1_b',
     'another_provider_2' => 'test_2_a',
     'test_2' => 'test_2_b',
-  );
+  ];
 
   protected function setUp() {
     parent::setUp();
 
     $base_path = __DIR__ . '/Fixtures';
     // Set up the directories to search.
-    $directories = array(
+    $directories = [
       'test_1' => $base_path . '/test_1',
       'test_2' => $base_path . '/test_2',
-    );
+    ];
 
     $this->discovery = new YamlDiscovery('test', $directories);
   }
@@ -59,7 +59,7 @@ public function testGetDefinitions() {
     }
 
     foreach ($definitions as $id => $definition) {
-      foreach (array('name', 'id', 'provider') as $key) {
+      foreach (['name', 'id', 'provider'] as $key) {
         $this->assertArrayHasKey($key, $definition);
       }
       $this->assertEquals($id, $definition['id']);
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Fixtures/TestConfigurablePlugin.php b/core/tests/Drupal/Tests/Core/Plugin/Fixtures/TestConfigurablePlugin.php
index 30b3e45e20cd2d2a8097d513ce346909f3e0e55f..383b4d2bbff71284f8fe6d2a5cc1b554e98f1c4e 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Fixtures/TestConfigurablePlugin.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Fixtures/TestConfigurablePlugin.php
@@ -25,14 +25,14 @@ public function setConfiguration(array $configuration) {
    * {@inheritdoc}
    */
   public function defaultConfiguration() {
-    return array();
+    return [];
   }
 
   /**
    * {@inheritdoc}
    */
   public function calculateDependencies() {
-    return array();
+    return [];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Plugin/LazyPluginCollectionTestBase.php b/core/tests/Drupal/Tests/Core/Plugin/LazyPluginCollectionTestBase.php
index 8e92ef0e8f80399dab45fa936cd73c45de7a79a6..1974e4a5a8c7dcad32bed513e5669634dc9f75d0 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/LazyPluginCollectionTestBase.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/LazyPluginCollectionTestBase.php
@@ -36,11 +36,11 @@ abstract class LazyPluginCollectionTestBase extends UnitTestCase {
    *
    * @var array
    */
-  protected $config = array(
-    'banana' => array('id' => 'banana', 'key' => 'value'),
-    'cherry' => array('id' => 'cherry', 'key' => 'value'),
-    'apple' => array('id' => 'apple', 'key' => 'value'),
-  );
+  protected $config = [
+    'banana' => ['id' => 'banana', 'key' => 'value'],
+    'cherry' => ['id' => 'cherry', 'key' => 'value'],
+    'apple' => ['id' => 'apple', 'key' => 'value'],
+  ];
 
   protected function setUp() {
     $this->pluginManager = $this->getMock('Drupal\Component\Plugin\PluginManagerInterface');
@@ -59,18 +59,18 @@ protected function setUp() {
    *   Defaults to $this->never().
    */
   protected function setupPluginCollection(\PHPUnit_Framework_MockObject_Matcher_InvokedRecorder $create_count = NULL) {
-    $this->pluginInstances = array();
-    $map = array();
+    $this->pluginInstances = [];
+    $map = [];
     foreach ($this->getPluginDefinitions() as $plugin_id => $definition) {
       // Create a mock plugin instance.
       $this->pluginInstances[$plugin_id] = $this->getPluginMock($plugin_id, $definition);
 
-      $map[] = array($plugin_id, $this->config[$plugin_id], $this->pluginInstances[$plugin_id]);
+      $map[] = [$plugin_id, $this->config[$plugin_id], $this->pluginInstances[$plugin_id]];
     }
     $create_count = $create_count ?: $this->never();
     $this->pluginManager->expects($create_count)
       ->method('createInstance')
-      ->will($this->returnCallback(array($this, 'returnPluginMap')));
+      ->will($this->returnCallback([$this, 'returnPluginMap']));
 
     $this->defaultPluginCollection = new DefaultLazyPluginCollection($this->pluginManager, $this->config);
   }
@@ -116,32 +116,32 @@ protected function getPluginMock($plugin_id, array $definition) {
    *   The example plugin definitions.
    */
   protected function getPluginDefinitions() {
-    $definitions = array(
-      'apple' => array(
+    $definitions = [
+      'apple' => [
         'id' => 'apple',
         'label' => 'Apple',
         'color' => 'green',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Apple',
         'provider' => 'plugin_test',
-      ),
-      'banana' => array(
+      ],
+      'banana' => [
         'id' => 'banana',
         'label' => 'Banana',
         'color' => 'yellow',
-        'uses' => array(
+        'uses' => [
           'bread' => 'Banana bread',
-        ),
+        ],
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Banana',
         'provider' => 'plugin_test',
-      ),
-      'cherry' => array(
+      ],
+      'cherry' => [
         'id' => 'cherry',
         'label' => 'Cherry',
         'color' => 'red',
         'class' => 'Drupal\plugin_test\Plugin\plugin_test\fruit\Cherry',
         'provider' => 'plugin_test',
-      ),
-    );
+      ],
+    ];
     return $definitions;
   }
 
diff --git a/core/tests/Drupal/Tests/Core/ProxyBuilder/ProxyBuilderTest.php b/core/tests/Drupal/Tests/Core/ProxyBuilder/ProxyBuilderTest.php
index 0e883951a7a0f195d28c50f0decb40bacba78acc..5f0779e33eb03b1a03ff4ce5ebe1608afe7ba61e 100644
--- a/core/tests/Drupal/Tests/Core/ProxyBuilder/ProxyBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/ProxyBuilder/ProxyBuilderTest.php
@@ -165,7 +165,7 @@ class TestServiceNoMethod {
 
 class TestServiceComplexMethod {
 
-  public function complexMethod($parameter, callable $function, TestServiceNoMethod $test_service = NULL, array &$elements = array()) {
+  public function complexMethod($parameter, callable $function, TestServiceNoMethod $test_service = NULL, array &$elements = []) {
 
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php b/core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php
index 93ee950e3f8ae4c33c976dadb9b7ed096a54ea24..69d59d71f09c11ef1982f5f0b2eeea40a5453f02 100644
--- a/core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php
@@ -241,102 +241,102 @@ public function providerTestCreateFromRenderArray() {
    * @covers ::mergeAttachments
    */
   function testMergeAttachmentsLibraryMerging() {
-    $a['#attached'] = array(
-      'library' => array(
+    $a['#attached'] = [
+      'library' => [
         'core/drupal',
         'core/drupalSettings',
-      ),
+      ],
       'drupalSettings' => [
         'foo' => ['d'],
       ],
-    );
-    $b['#attached'] = array(
-      'library' => array(
+    ];
+    $b['#attached'] = [
+      'library' => [
         'core/jquery',
-      ),
+      ],
       'drupalSettings' => [
         'bar' => ['a', 'b', 'c'],
       ],
-    );
-    $expected['#attached'] = array(
-      'library' => array(
+    ];
+    $expected['#attached'] = [
+      'library' => [
         'core/drupal',
         'core/drupalSettings',
         'core/jquery',
-      ),
+      ],
       'drupalSettings' => [
         'foo' => ['d'],
         'bar' => ['a', 'b', 'c'],
       ],
-    );
+    ];
     $this->assertSame($expected['#attached'], BubbleableMetadata::mergeAttachments($a['#attached'], $b['#attached']), 'Attachments merged correctly.');
 
     // Merging in the opposite direction yields the opposite library order.
-    $expected['#attached'] = array(
-      'library' => array(
+    $expected['#attached'] = [
+      'library' => [
         'core/jquery',
         'core/drupal',
         'core/drupalSettings',
-      ),
+      ],
       'drupalSettings' => [
         'bar' => ['a', 'b', 'c'],
         'foo' => ['d'],
       ],
-    );
+    ];
     $this->assertSame($expected['#attached'], BubbleableMetadata::mergeAttachments($b['#attached'], $a['#attached']), 'Attachments merged correctly; opposite merging yields opposite order.');
 
     // Merging with duplicates: duplicates are simply retained, it's up to the
     // rest of the system to handle duplicates.
     $b['#attached']['library'][] = 'core/drupalSettings';
-    $expected['#attached'] = array(
-      'library' => array(
+    $expected['#attached'] = [
+      'library' => [
         'core/drupal',
         'core/drupalSettings',
         'core/jquery',
         'core/drupalSettings',
-      ),
+      ],
       'drupalSettings' => [
         'foo' => ['d'],
         'bar' => ['a', 'b', 'c'],
       ],
-    );
+    ];
     $this->assertSame($expected['#attached'], BubbleableMetadata::mergeAttachments($a['#attached'], $b['#attached']), 'Attachments merged correctly; duplicates are retained.');
 
     // Merging with duplicates (simple case).
     $b['#attached']['drupalSettings']['foo'] = ['a', 'b', 'c'];
-    $expected['#attached'] = array(
-      'library' => array(
+    $expected['#attached'] = [
+      'library' => [
         'core/drupal',
         'core/drupalSettings',
         'core/jquery',
         'core/drupalSettings',
-      ),
+      ],
       'drupalSettings' => [
         'foo' => ['a', 'b', 'c'],
         'bar' => ['a', 'b', 'c'],
       ],
-    );
+    ];
     $this->assertSame($expected['#attached'], BubbleableMetadata::mergeAttachments($a['#attached'], $b['#attached']));
 
     // Merging with duplicates (simple case) in the opposite direction yields
     // the opposite JS setting asset order, but also opposite overriding order.
-    $expected['#attached'] = array(
-      'library' => array(
+    $expected['#attached'] = [
+      'library' => [
         'core/jquery',
         'core/drupalSettings',
         'core/drupal',
         'core/drupalSettings',
-      ),
+      ],
       'drupalSettings' => [
         'bar' => ['a', 'b', 'c'],
         'foo' => ['d', 'b', 'c'],
       ],
-    );
+    ];
     $this->assertSame($expected['#attached'], BubbleableMetadata::mergeAttachments($b['#attached'], $a['#attached']));
 
     // Merging with duplicates: complex case.
     // Only the second of these two entries should appear in drupalSettings.
-    $build = array();
+    $build = [];
     $build['a']['#attached']['drupalSettings']['commonTest'] = 'firstValue';
     $build['b']['#attached']['drupalSettings']['commonTest'] = 'secondValue';
     // Only the second of these entries should appear in drupalSettings.
@@ -348,12 +348,12 @@ function testMergeAttachmentsLibraryMerging() {
     // Real world test case: multiple elements in a render array are adding the
     // same (or nearly the same) JavaScript settings. When merged, they should
     // contain all settings and not duplicate some settings.
-    $settings_one = array('moduleName' => array('ui' => array('button A', 'button B'), 'magical flag' => 3.14159265359));
+    $settings_one = ['moduleName' => ['ui' => ['button A', 'button B'], 'magical flag' => 3.14159265359]];
     $build['a']['#attached']['drupalSettings']['commonTestRealWorldIdentical'] = $settings_one;
     $build['b']['#attached']['drupalSettings']['commonTestRealWorldIdentical'] = $settings_one;
-    $settings_two_a = array('moduleName' => array('ui' => array('button A', 'button B', 'button C'), 'magical flag' => 3.14159265359, 'thingiesOnPage' => array('id1' => array())));
+    $settings_two_a = ['moduleName' => ['ui' => ['button A', 'button B', 'button C'], 'magical flag' => 3.14159265359, 'thingiesOnPage' => ['id1' => []]]];
     $build['a']['#attached']['drupalSettings']['commonTestRealWorldAlmostIdentical'] = $settings_two_a;
-    $settings_two_b = array('moduleName' => array('ui' => array('button D', 'button E'), 'magical flag' => 3.14, 'thingiesOnPage' => array('id2' => array())));
+    $settings_two_b = ['moduleName' => ['ui' => ['button D', 'button E'], 'magical flag' => 3.14, 'thingiesOnPage' => ['id2' => []]]];
     $build['b']['#attached']['drupalSettings']['commonTestRealWorldAlmostIdentical'] = $settings_two_b;
 
     $merged = BubbleableMetadata::mergeAttachments($build['a']['#attached'], $build['b']['#attached']);
@@ -373,7 +373,7 @@ function testMergeAttachmentsLibraryMerging() {
     // adds the exact same settings twice and hence tests idempotency, the
     // second adds *almost* the same settings twice: the second time, some
     // values are altered, and some key-value pairs are added.
-    $settings_two['moduleName']['thingiesOnPage']['id1'] = array();
+    $settings_two['moduleName']['thingiesOnPage']['id1'] = [];
     $this->assertSame($settings_one, $merged['drupalSettings']['commonTestRealWorldIdentical']);
     $expected_settings_two = $settings_two_a;
     $expected_settings_two['moduleName']['ui'][0] = 'button D';
diff --git a/core/tests/Drupal/Tests/Core/Render/Element/HtmlTagTest.php b/core/tests/Drupal/Tests/Core/Render/Element/HtmlTagTest.php
index bef5ceff22296c57dbac046ada5c7b7b1ebf5045..46dd91a87d618a9b50ae189dea978c9df3b14ad5 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/HtmlTagTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/HtmlTagTest.php
@@ -16,7 +16,7 @@ class HtmlTagTest extends UnitTestCase {
    * @covers ::getInfo
    */
   public function testGetInfo() {
-    $htmlTag = new HtmlTag(array(), 'test', 'test');
+    $htmlTag = new HtmlTag([], 'test', 'test');
     $info = $htmlTag->getInfo();
     $this->assertArrayHasKey('#pre_render', $info);
     $this->assertArrayHasKey('#attributes', $info);
@@ -37,60 +37,60 @@ public function testPreRenderHtmlTag($element, $expected) {
    * Data provider for preRenderHtmlTag test.
    */
   public function providerPreRenderHtmlTag() {
-    $tags = array();
+    $tags = [];
 
     // Value prefix/suffix.
-    $element = array(
+    $element = [
       '#value' => 'value',
       '#tag' => 'p',
-    );
-    $tags[] = array($element, '<p>value</p>' . "\n");
+    ];
+    $tags[] = [$element, '<p>value</p>' . "\n"];
 
     // Normal element without a value should not result in a void element.
-    $element = array(
+    $element = [
       '#tag' => 'p',
       '#value' => NULL,
-    );
-    $tags[] = array($element, "<p></p>\n");
+    ];
+    $tags[] = [$element, "<p></p>\n"];
 
     // A void element.
-    $element = array(
+    $element = [
       '#tag' => 'br',
-    );
-    $tags[] = array($element, "<br />\n");
+    ];
+    $tags[] = [$element, "<br />\n"];
 
     // Attributes.
-    $element = array(
+    $element = [
       '#tag' => 'div',
-      '#attributes' => array('class' => 'test', 'id' => 'id'),
+      '#attributes' => ['class' => 'test', 'id' => 'id'],
       '#value' => 'value',
-    );
-    $tags[] = array($element, '<div class="test" id="id">value</div>' . "\n");
+    ];
+    $tags[] = [$element, '<div class="test" id="id">value</div>' . "\n"];
 
     // No script tags.
     $element['#noscript'] = TRUE;
-    $tags[] = array($element, '<noscript><div class="test" id="id">value</div>' . "\n" . '</noscript>');
+    $tags[] = [$element, '<noscript><div class="test" id="id">value</div>' . "\n" . '</noscript>'];
 
     // Ensure that #tag is sanitised.
-    $element = array(
+    $element = [
       '#tag' => 'p><script>alert()</script><p',
       '#value' => 'value',
-    );
-    $tags[] = array($element, "<p&gt;&lt;script&gt;alert()&lt;/script&gt;&lt;p>value</p&gt;&lt;script&gt;alert()&lt;/script&gt;&lt;p>\n");
+    ];
+    $tags[] = [$element, "<p&gt;&lt;script&gt;alert()&lt;/script&gt;&lt;p>value</p&gt;&lt;script&gt;alert()&lt;/script&gt;&lt;p>\n"];
 
     // Ensure that #value is not filtered if it is marked as safe.
-    $element = array(
+    $element = [
       '#tag' => 'p',
       '#value' => Markup::create('<script>value</script>'),
-    );
-    $tags[] = array($element, "<p><script>value</script></p>\n");
+    ];
+    $tags[] = [$element, "<p><script>value</script></p>\n"];
 
     // Ensure that #value is filtered if it is not safe.
-    $element = array(
+    $element = [
       '#tag' => 'p',
       '#value' => '<script>value</script>',
-    );
-    $tags[] = array($element, "<p>value</p>\n");
+    ];
+    $tags[] = [$element, "<p>value</p>\n"];
 
     return $tags;
   }
@@ -112,74 +112,74 @@ public function testPreRenderConditionalComments($element, $expected, $set_safe
    */
   public function providerPreRenderConditionalComments() {
     // No browser specification.
-    $element = array(
+    $element = [
       '#tag' => 'link',
-    );
-    $tags[] = array($element, $element);
+    ];
+    $tags[] = [$element, $element];
 
     // Specify all browsers.
-    $element['#browsers'] = array(
+    $element['#browsers'] = [
       'IE' => TRUE,
       '!IE' => TRUE,
-    );
-    $tags[] = array($element, $element);
+    ];
+    $tags[] = [$element, $element];
 
     // All IE.
-    $element = array(
+    $element = [
       '#tag' => 'link',
-      '#browsers' => array(
+      '#browsers' => [
         'IE' => TRUE,
         '!IE' => FALSE,
-      ),
-    );
+      ],
+    ];
     $expected = $element;
     $expected['#prefix'] = "\n<!--[if IE]>\n";
     $expected['#suffix'] = "<![endif]-->\n";
-    $tags[] = array($element, $expected);
+    $tags[] = [$element, $expected];
 
     // Exclude IE.
-    $element = array(
+    $element = [
       '#tag' => 'link',
-      '#browsers' => array(
+      '#browsers' => [
         'IE' => FALSE,
-      ),
-    );
+      ],
+    ];
     $expected = $element;
     $expected['#prefix'] = "\n<!--[if !IE]><!-->\n";
     $expected['#suffix'] = "<!--<![endif]-->\n";
-    $tags[] = array($element, $expected);
+    $tags[] = [$element, $expected];
 
     // IE gt 8
-    $element = array(
+    $element = [
       '#tag' => 'link',
-      '#browsers' => array(
+      '#browsers' => [
         'IE' => 'gt IE 8',
-      ),
-    );
+      ],
+    ];
     $expected = $element;
     $expected['#prefix'] = "\n<!--[if gt IE 8]><!-->\n";
     $expected['#suffix'] = "<!--<![endif]-->\n";
-    $tags[] = array($element, $expected);
+    $tags[] = [$element, $expected];
 
     // Prefix and suffix filtering if not safe.
-    $element = array(
+    $element = [
       '#tag' => 'link',
-      '#browsers' => array(
+      '#browsers' => [
         'IE' => FALSE,
-      ),
+      ],
       '#prefix' => '<blink>prefix</blink>',
       '#suffix' => '<blink>suffix</blink>',
-    );
+    ];
     $expected = $element;
     $expected['#prefix'] = "\n<!--[if !IE]><!-->\nprefix";
     $expected['#suffix'] = "suffix<!--<![endif]-->\n";
-    $tags[] = array($element, $expected);
+    $tags[] = [$element, $expected];
 
     // Prefix and suffix filtering if marked as safe. This has to come after the
     // previous test case.
     $expected['#prefix'] = "\n<!--[if !IE]><!-->\n<blink>prefix</blink>";
     $expected['#suffix'] = "<blink>suffix</blink><!--<![endif]-->\n";
-    $tags[] = array($element, $expected, TRUE);
+    $tags[] = [$element, $expected, TRUE];
 
     return $tags;
   }
diff --git a/core/tests/Drupal/Tests/Core/Render/ElementInfoManagerTest.php b/core/tests/Drupal/Tests/Core/Render/ElementInfoManagerTest.php
index 0d5aec69c53da54d696d9a9970061618b5c32d01..c3058300d0e3743d639428eff604eeba39a860ff 100644
--- a/core/tests/Drupal/Tests/Core/Render/ElementInfoManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/ElementInfoManagerTest.php
@@ -85,13 +85,13 @@ public function testGetInfoElementPlugin($plugin_class, $expected_info) {
     $plugin = $this->getMock($plugin_class);
     $plugin->expects($this->once())
       ->method('getInfo')
-      ->willReturn(array(
+      ->willReturn([
         '#theme' => 'page',
-      ));
+      ]);
 
     $element_info = $this->getMockBuilder('Drupal\Core\Render\ElementInfoManager')
-      ->setConstructorArgs(array(new \ArrayObject(), $this->cache, $this->cacheTagsInvalidator, $this->moduleHandler, $this->themeManager))
-      ->setMethods(array('getDefinitions', 'createInstance'))
+      ->setConstructorArgs([new \ArrayObject(), $this->cache, $this->cacheTagsInvalidator, $this->moduleHandler, $this->themeManager])
+      ->setMethods(['getDefinitions', 'createInstance'])
       ->getMock();
 
     $this->themeManager->expects($this->any())
@@ -104,9 +104,9 @@ public function testGetInfoElementPlugin($plugin_class, $expected_info) {
       ->willReturn($plugin);
     $element_info->expects($this->once())
       ->method('getDefinitions')
-      ->willReturn(array(
-        'page' => array('class' => 'TestElementPlugin'),
-      ));
+      ->willReturn([
+        'page' => ['class' => 'TestElementPlugin'],
+      ]);
 
     $this->assertEquals($expected_info, $element_info->getInfo('page'));
   }
@@ -117,26 +117,26 @@ public function testGetInfoElementPlugin($plugin_class, $expected_info) {
    * @return array
    */
   public function providerTestGetInfoElementPlugin() {
-    $data = array();
-    $data[] = array(
+    $data = [];
+    $data[] = [
       'Drupal\Core\Render\Element\ElementInterface',
-      array(
+      [
         '#type' => 'page',
         '#theme' => 'page',
         '#defaults_loaded' => TRUE,
-      ),
-    );
+      ],
+    ];
 
-    $data[] = array(
+    $data[] = [
       'Drupal\Core\Render\Element\FormElementInterface',
-      array(
+      [
         '#type' => 'page',
         '#theme' => 'page',
         '#input' => TRUE,
-        '#value_callback' => array('TestElementPlugin', 'valueCallback'),
+        '#value_callback' => ['TestElementPlugin', 'valueCallback'],
         '#defaults_loaded' => TRUE,
-      ),
-    );
+      ],
+    ];
     return $data;
   }
 
@@ -164,12 +164,12 @@ class TestElementInfoManager extends ElementInfoManager {
   /**
    * {@inheritdoc}
    */
-  protected $elementInfo = array(
-    'test' => array(
-      'foo' => array(
+  protected $elementInfo = [
+    'test' => [
+      'foo' => [
         '#bar' => 'baz',
-      ),
-    ),
-  );
+      ],
+    ],
+  ];
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Render/ElementTest.php b/core/tests/Drupal/Tests/Core/Render/ElementTest.php
index 604d391d8d1a1d735fe7c732fac1879bd727c028..b9f86ac4918b4644bfab12ecba4ea0a0c9af6df8 100644
--- a/core/tests/Drupal/Tests/Core/Render/ElementTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/ElementTest.php
@@ -25,11 +25,11 @@ public function testProperty() {
    * Tests the properties() method.
    */
   public function testProperties() {
-    $element = array(
+    $element = [
       '#property1' => 'property1',
       '#property2' => 'property2',
       'property3' => 'property3'
-    );
+    ];
 
     $properties = Element::properties($element);
 
@@ -51,51 +51,51 @@ public function testChild() {
    * Tests the children() method.
    */
   public function testChildren() {
-    $element = array(
-      'child2' => array('#weight' => 10),
-      'child1' => array('#weight' => 0),
-      'child3' => array('#weight' => 20),
+    $element = [
+      'child2' => ['#weight' => 10],
+      'child1' => ['#weight' => 0],
+      'child3' => ['#weight' => 20],
       '#property' => 'property',
-    );
+    ];
 
-    $expected = array('child2', 'child1', 'child3');
+    $expected = ['child2', 'child1', 'child3'];
     $element_copy = $element;
     $this->assertSame($expected, Element::children($element_copy));
 
     // If #sorted is already set, no sorting should happen.
     $element_copy = $element;
     $element_copy['#sorted'] = TRUE;
-    $expected = array('child2', 'child1', 'child3');
+    $expected = ['child2', 'child1', 'child3'];
     $this->assertSame($expected, Element::children($element_copy, TRUE));
 
     // Test with weight sorting, #sorted property should be added.
-    $expected = array('child1', 'child2', 'child3');
+    $expected = ['child1', 'child2', 'child3'];
     $element_copy = $element;
     $this->assertSame($expected, Element::children($element_copy, TRUE));
     $this->assertArrayHasKey('#sorted', $element_copy);
     $this->assertTrue($element_copy['#sorted']);
 
     // The order should stay the same if no weights present.
-    $element_no_weight = array(
-      'child2' => array(),
-      'child1' => array(),
-      'child3' => array(),
+    $element_no_weight = [
+      'child2' => [],
+      'child1' => [],
+      'child3' => [],
       '#property' => 'property',
-    );
+    ];
 
-    $expected = array('child2', 'child1', 'child3');
+    $expected = ['child2', 'child1', 'child3'];
     $this->assertSame($expected, Element::children($element_no_weight, TRUE));
 
     // The order of children with same weight should be preserved.
-    $element_mixed_weight = array(
-      'child5' => array('#weight' => 10),
-      'child3' => array('#weight' => -10),
-      'child1' => array(),
-      'child4' => array('#weight' => 10),
-      'child2' => array(),
-    );
-
-    $expected = array('child3', 'child1', 'child2', 'child5', 'child4');
+    $element_mixed_weight = [
+      'child5' => ['#weight' => 10],
+      'child3' => ['#weight' => -10],
+      'child1' => [],
+      'child4' => ['#weight' => 10],
+      'child2' => [],
+    ];
+
+    $expected = ['child3', 'child1', 'child2', 'child5', 'child4'];
     $this->assertSame($expected, Element::children($element_mixed_weight, TRUE));
   }
 
@@ -106,9 +106,9 @@ public function testChildren() {
    * @expectedExceptionMessage "foo" is an invalid render array key
    */
   public function testInvalidChildren() {
-    $element = array(
+    $element = [
       'foo' => 'bar',
-    );
+    ];
     Element::children($element);
   }
 
@@ -116,10 +116,10 @@ public function testInvalidChildren() {
    * Tests the children() method with an ignored key/value pair.
    */
   public function testIgnoredChildren() {
-    $element = array(
+    $element = [
       'foo' => NULL,
-    );
-    $this->assertSame(array(), Element::children($element));
+    ];
+    $this->assertSame([], Element::children($element));
   }
 
   /**
@@ -142,17 +142,17 @@ public function testVisibleChildren(array $element, array $expected_keys) {
    * @return array
    */
   public function providerVisibleChildren() {
-    return array(
-      array(array('#property1' => '', '#property2' => array()), array()),
-      array(array('#property1' => '', 'child1' => array()), array('child1')),
-      array(array('#property1' => '', 'child1' => array(), 'child2' => array('#access' => TRUE)), array('child1', 'child2')),
-      array(array('#property1' => '', 'child1' => array(), 'child2' => array('#access' => FALSE)), array('child1')),
-      'access_result_object_allowed' => array(array('#property1' => '', 'child1' => array(), 'child2' => array('#access' => AccessResult::allowed())), array('child1', 'child2')),
-      'access_result_object_forbidden' => array(array('#property1' => '', 'child1' => array(), 'child2' => array('#access' => AccessResult::forbidden())), array('child1')),
-      array(array('#property1' => '', 'child1' => array(), 'child2' => array('#type' => 'textfield')), array('child1', 'child2')),
-      array(array('#property1' => '', 'child1' => array(), 'child2' => array('#type' => 'value')), array('child1')),
-      array(array('#property1' => '', 'child1' => array(), 'child2' => array('#type' => 'hidden')), array('child1')),
-    );
+    return [
+      [['#property1' => '', '#property2' => []], []],
+      [['#property1' => '', 'child1' => []], ['child1']],
+      [['#property1' => '', 'child1' => [], 'child2' => ['#access' => TRUE]], ['child1', 'child2']],
+      [['#property1' => '', 'child1' => [], 'child2' => ['#access' => FALSE]], ['child1']],
+      'access_result_object_allowed' => [['#property1' => '', 'child1' => [], 'child2' => ['#access' => AccessResult::allowed()]], ['child1', 'child2']],
+      'access_result_object_forbidden' => [['#property1' => '', 'child1' => [], 'child2' => ['#access' => AccessResult::forbidden()]], ['child1']],
+      [['#property1' => '', 'child1' => [], 'child2' => ['#type' => 'textfield']], ['child1', 'child2']],
+      [['#property1' => '', 'child1' => [], 'child2' => ['#type' => 'value']], ['child1']],
+      [['#property1' => '', 'child1' => [], 'child2' => ['#type' => 'hidden']], ['child1']],
+    ];
   }
 
   /**
@@ -169,12 +169,12 @@ public function testSetAttributes($element, $map, $expected_element) {
    * Data provider for testSetAttributes().
    */
   public function providerTestSetAttributes() {
-    $base = array('#id' => 'id', '#class' => array());
-    return array(
-      array($base, array(), $base),
-      array($base, array('id', 'class'), $base + array('#attributes' => array('id' => 'id', 'class' => array()))),
-      array($base + array('#attributes' => array('id' => 'id-not-overwritten')), array('id', 'class'), $base + array('#attributes' => array('id' => 'id-not-overwritten', 'class' => array()))),
-    );
+    $base = ['#id' => 'id', '#class' => []];
+    return [
+      [$base, [], $base],
+      [$base, ['id', 'class'], $base + ['#attributes' => ['id' => 'id', 'class' => []]]],
+      [$base + ['#attributes' => ['id' => 'id-not-overwritten']], ['id', 'class'], $base + ['#attributes' => ['id' => 'id-not-overwritten', 'class' => []]]],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Render/RendererTest.php b/core/tests/Drupal/Tests/Core/Render/RendererTest.php
index cea677b9b23cfe70501bd5ec7de7594d3c144e1e..7ac4a901644c82b1ae246b899971518512a17bb4 100644
--- a/core/tests/Drupal/Tests/Core/Render/RendererTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/RendererTest.php
@@ -151,7 +151,7 @@ public function providerTestRenderBasic() {
     // Test #allowed_tags in combination with #markup and #pre_render.
     $data[] = [[
       '#markup' => 'foo',
-      '#allowed_tags' => array('script'),
+      '#allowed_tags' => ['script'],
       '#pre_render' => [function($elements) {
         $elements['#markup'] .= '<script>alert("bar");</script>';
         return $elements;
@@ -408,17 +408,17 @@ public function testRenderSortingWithSetHashSorted() {
     $first = $this->randomMachineName();
     $second = $this->randomMachineName();
     // The same array structure again, but with #sorted set to TRUE.
-    $elements = array(
-      'second' => array(
+    $elements = [
+      'second' => [
         '#weight' => 10,
         '#markup' => $second,
-      ),
-      'first' => array(
+      ],
+      'first' => [
         '#weight' => 0,
         '#markup' => $first,
-      ),
+      ],
       '#sorted' => TRUE,
-    );
+    ];
     $output = $this->renderer->renderRoot($elements);
 
     // The elements should appear in output in the same order as the array.
@@ -597,9 +597,9 @@ protected function setupThemeContainerMultiSuggestion($matcher = NULL) {
    * @covers ::doRender
    */
   public function testRenderWithoutThemeArguments() {
-    $element = array(
+    $element = [
       '#theme' => 'common_test_foo',
-    );
+    ];
 
     $this->themeManager->expects($this->once())
       ->method('render')
@@ -615,11 +615,11 @@ public function testRenderWithoutThemeArguments() {
    * @covers ::doRender
    */
   public function testRenderWithThemeArguments() {
-    $element = array(
+    $element = [
       '#theme' => 'common_test_foo',
       '#foo' => $this->randomMachineName(),
       '#bar' => $this->randomMachineName(),
-    );
+    ];
 
     $this->themeManager->expects($this->once())
       ->method('render')
diff --git a/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php b/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
index dadf612f02d413ace0e611a99c025127bccb3bb2..96a01b431ca9fdbc4e1db7fa7e9f3bc2fa37c35b 100644
--- a/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
+++ b/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
@@ -27,54 +27,54 @@ class RoleAccessCheckTest extends UnitTestCase {
   protected function getTestRouteCollection() {
     $route_collection = new RouteCollection();
     $route_collection->add('role_test_1', new Route('/role_test_1',
-      array(
+      [
         '_controller' => '\Drupal\router_test\TestControllers::test1',
-      ),
-      array(
+      ],
+      [
         '_role' => 'role_test_1',
-      )
+      ]
     ));
     $route_collection->add('role_test_2', new Route('/role_test_2',
-      array(
+      [
         '_controller' => '\Drupal\router_test\TestControllers::test1',
-      ),
-      array(
+      ],
+      [
         '_role' => 'role_test_2',
-      )
+      ]
     ));
     $route_collection->add('role_test_3', new Route('/role_test_3',
-      array(
+      [
         '_controller' => '\Drupal\router_test\TestControllers::test1',
-      ),
-      array(
+      ],
+      [
         '_role' => 'role_test_1,role_test_2',
-      )
+      ]
     ));
     // Ensure that trimming the values works on "OR" conjunctions.
     $route_collection->add('role_test_4', new Route('/role_test_4',
-      array(
+      [
         '_controller' => '\Drupal\router_test\TestControllers::test1',
-      ),
-      array(
+      ],
+      [
         '_role' => 'role_test_1 , role_test_2',
-      )
+      ]
     ));
     $route_collection->add('role_test_5', new Route('/role_test_5',
-      array(
+      [
         '_controller' => '\Drupal\router_test\TestControllers::test1',
-      ),
-      array(
+      ],
+      [
         '_role' => 'role_test_1+role_test_2',
-      )
+      ]
     ));
     // Ensure that trimming the values works on "AND" conjunctions.
     $route_collection->add('role_test_6', new Route('/role_test_6',
-      array(
+      [
         '_controller' => '\Drupal\router_test\TestControllers::test1',
-      ),
-      array(
+      ],
+      [
         '_role' => 'role_test_1 + role_test_2',
-      )
+      ]
     ));
 
     return $route_collection;
@@ -93,35 +93,35 @@ public function roleAccessProvider() {
     // Setup one user with the first role, one with the second, one with both
     // and one final without any of these two roles.
 
-    $account_1 = new UserSession(array(
+    $account_1 = new UserSession([
       'uid' => 1,
-      'roles' => array($rid_1),
-    ));
+      'roles' => [$rid_1],
+    ]);
 
-    $account_2 = new UserSession(array(
+    $account_2 = new UserSession([
       'uid' => 2,
-      'roles' => array($rid_2),
-    ));
+      'roles' => [$rid_2],
+    ]);
 
-    $account_12 = new UserSession(array(
+    $account_12 = new UserSession([
       'uid' => 3,
-      'roles' => array($rid_1, $rid_2),
-    ));
+      'roles' => [$rid_1, $rid_2],
+    ]);
 
-    $account_none = new UserSession(array(
+    $account_none = new UserSession([
       'uid' => 1,
-      'roles' => array(),
-    ));
+      'roles' => [],
+    ]);
 
     // Setup expected values; specify which paths can be accessed by which user.
-    return array(
-      array('role_test_1', array($account_1, $account_12), array($account_2, $account_none)),
-      array('role_test_2', array($account_2, $account_12), array($account_1, $account_none)),
-      array('role_test_3', array($account_12), array($account_1, $account_2, $account_none)),
-      array('role_test_4', array($account_12), array($account_1, $account_2, $account_none)),
-      array('role_test_5', array($account_1, $account_2, $account_12), array()),
-      array('role_test_6', array($account_1, $account_2, $account_12), array()),
-    );
+    return [
+      ['role_test_1', [$account_1, $account_12], [$account_2, $account_none]],
+      ['role_test_2', [$account_2, $account_12], [$account_1, $account_none]],
+      ['role_test_3', [$account_12], [$account_1, $account_2, $account_none]],
+      ['role_test_4', [$account_12], [$account_1, $account_2, $account_none]],
+      ['role_test_5', [$account_1, $account_2, $account_12], []],
+      ['role_test_6', [$account_1, $account_2, $account_12], []],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/RouteProcessor/RouteProcessorManagerTest.php b/core/tests/Drupal/Tests/Core/RouteProcessor/RouteProcessorManagerTest.php
index 5bc2be0fa36a18681f7666f132a8ef18d2a9b0a6..1de17456e257c05989c7f09cc32e755de3f8a00a 100644
--- a/core/tests/Drupal/Tests/Core/RouteProcessor/RouteProcessorManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/RouteProcessor/RouteProcessorManagerTest.php
@@ -30,14 +30,14 @@ protected function setUp() {
    */
   public function testRouteProcessorManager() {
     $route = new Route('');
-    $parameters = array('test' => 'test');
+    $parameters = ['test' => 'test'];
     $route_name = 'test_name';
 
-    $processors = array(
+    $processors = [
       10 => $this->getMockProcessor($route_name, $route, $parameters),
       5 => $this->getMockProcessor($route_name, $route, $parameters),
       0 => $this->getMockProcessor($route_name, $route, $parameters),
-    );
+    ];
 
     // Add the processors in reverse order.
     foreach ($processors as $priority => $processor) {
diff --git a/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php b/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
index 0b7bcc6730e86add02ca9227b981d199b537f607..d73513e78c53737648a23eeec57045b1e7ab8564 100644
--- a/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/AccessAwareRouterTest.php
@@ -61,7 +61,7 @@ protected function setupRouter() {
       ->getMock();
     $this->chainRouter->expects($this->once())
       ->method('matchRequest')
-      ->will($this->returnValue(array(RouteObjectInterface::ROUTE_OBJECT => $this->route)));
+      ->will($this->returnValue([RouteObjectInterface::ROUTE_OBJECT => $this->route]));
     $this->router = new AccessAwareRouter($this->chainRouter, $this->accessManager, $this->currentUser);
   }
 
diff --git a/core/tests/Drupal/Tests/Core/Routing/RouteBuilderTest.php b/core/tests/Drupal/Tests/Core/Routing/RouteBuilderTest.php
index af3ef687fd5468661b0a08d8980645f5ba3ac679..d075934100d661633320f5f94f3c8ea0dca0b4f8 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RouteBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RouteBuilderTest.php
@@ -106,7 +106,7 @@ public function testRebuildLockingUnlocking() {
 
     $this->yamlDiscovery->expects($this->any())
       ->method('findAll')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->assertTrue($this->routeBuilder->rebuild());
   }
@@ -149,7 +149,7 @@ public function testRebuildWithStaticModuleRoutes() {
 
     $this->yamlDiscovery->expects($this->once())
       ->method('findAll')
-      ->will($this->returnValue(array('test_module' => $routes)));
+      ->will($this->returnValue(['test_module' => $routes]));
 
     $route_collection = $routing_fixtures->sampleRouteCollection();
     $route_build_event = new RouteBuildEvent($route_collection);
@@ -192,14 +192,14 @@ public function testRebuildWithProviderBasedRoutes() {
 
     $this->yamlDiscovery->expects($this->once())
       ->method('findAll')
-      ->will($this->returnValue(array(
-        'test_module' => array(
-          'route_callbacks' => array(
+      ->will($this->returnValue([
+        'test_module' => [
+          'route_callbacks' => [
             '\Drupal\Tests\Core\Routing\TestRouteSubscriber::routesFromArray',
             'test_module.route_service:routesFromCollection',
-          ),
-        ),
-      )));
+          ],
+        ],
+      ]));
 
     $container = new ContainerBuilder();
     $container->set('test_module.route_service', new TestRouteSubscriber());
@@ -215,7 +215,7 @@ public function testRebuildWithProviderBasedRoutes() {
           list($class, $method) = explode('::', $controller, 2);
           $object = new $class();
         }
-        return array($object, $method);
+        return [$object, $method];
       }));
 
     $route_collection_filled = new RouteCollection();
@@ -263,7 +263,7 @@ public function testRebuildIfNeeded() {
 
     $this->yamlDiscovery->expects($this->any())
       ->method('findAll')
-      ->will($this->returnValue(array()));
+      ->will($this->returnValue([]));
 
     $this->routeBuilder->setRebuildNeeded();
 
@@ -312,9 +312,9 @@ protected function getRouteDefinitions() {
  */
 class TestRouteSubscriber {
   public function routesFromArray() {
-    return array(
+    return [
       'test_route.1' => new Route('/test-route/1'),
-    );
+    ];
   }
   public function routesFromCollection() {
     $collection = new RouteCollection();
diff --git a/core/tests/Drupal/Tests/Core/Routing/RouteCompilerTest.php b/core/tests/Drupal/Tests/Core/Routing/RouteCompilerTest.php
index 271e313e2df1342e375a803021ae7ab4f1625078..2ddfdcaedee6fb7430112d5adef1ccec684fcbc5 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RouteCompilerTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RouteCompilerTest.php
@@ -38,15 +38,15 @@ public function testGetFit($path, $expected) {
    *   value.
    */
   public function providerTestGetFit() {
-    return array(
-      array('test', 1),
-      array('/testwithleadingslash', 1),
-      array('testwithtrailingslash/', 1),
-      array('/testwithslashes/', 1),
-      array('test/with/multiple/parts', 15),
-      array('test/with/{some}/slugs', 13),
-      array('test/very/long/path/that/drupal/7/could/not/have/handled', 2047),
-    );
+    return [
+      ['test', 1],
+      ['/testwithleadingslash', 1],
+      ['testwithtrailingslash/', 1],
+      ['/testwithslashes/', 1],
+      ['test/with/multiple/parts', 15],
+      ['test/with/{some}/slugs', 13],
+      ['test/very/long/path/that/drupal/7/could/not/have/handled', 2047],
+    ];
   }
 
   /**
@@ -67,9 +67,9 @@ public function testCompilation() {
   public function testCompilationDefaultValue() {
     // Because "here" has a default value, it should not factor into the outline
     // or the fitness.
-    $route = new Route('/test/{something}/more/{here}', array(
+    $route = new Route('/test/{something}/more/{here}', [
       'here' => 'there',
-    ));
+    ]);
     $route->setOption('compiler_class', 'Drupal\Core\Routing\RouteCompiler');
     $compiled = $route->compile();
 
diff --git a/core/tests/Drupal/Tests/Core/Routing/RouteMatchTest.php b/core/tests/Drupal/Tests/Core/Routing/RouteMatchTest.php
index 22055c9f28ebf4eb5cfaea32906b1ebca361cac3..0a3c65cbe9fbe386122b557771d84d2babb10a39 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RouteMatchTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RouteMatchTest.php
@@ -32,9 +32,9 @@ public function testRouteMatchFromRequest() {
     $route_match = RouteMatch::createFromRequest($request);
     $this->assertNull($route_match->getRouteName());
     $this->assertNull($route_match->getRouteObject());
-    $this->assertSame(array(), $route_match->getParameters()->all());
+    $this->assertSame([], $route_match->getParameters()->all());
     $this->assertNull($route_match->getParameter('foo'));
-    $this->assertSame(array(), $route_match->getRawParameters()->all());
+    $this->assertSame([], $route_match->getRawParameters()->all());
     $this->assertNull($route_match->getRawParameter('foo'));
 
     // A routed request without parameter upcasting.
@@ -45,17 +45,17 @@ public function testRouteMatchFromRequest() {
     $route_match = RouteMatch::createFromRequest($request);
     $this->assertSame('test_route', $route_match->getRouteName());
     $this->assertSame($route, $route_match->getRouteObject());
-    $this->assertSame(array('foo' => '1'), $route_match->getParameters()->all());
-    $this->assertSame(array(), $route_match->getRawParameters()->all());
+    $this->assertSame(['foo' => '1'], $route_match->getParameters()->all());
+    $this->assertSame([], $route_match->getRawParameters()->all());
 
     // A routed request with parameter upcasting.
     $foo = new \stdClass();
     $foo->value = 1;
     $request->attributes->set('foo', $foo);
-    $request->attributes->set('_raw_variables', new ParameterBag(array('foo' => '1')));
+    $request->attributes->set('_raw_variables', new ParameterBag(['foo' => '1']));
     $route_match = RouteMatch::createFromRequest($request);
-    $this->assertSame(array('foo' => $foo), $route_match->getParameters()->all());
-    $this->assertSame(array('foo' => '1'), $route_match->getRawParameters()->all());
+    $this->assertSame(['foo' => $foo], $route_match->getParameters()->all());
+    $this->assertSame(['foo' => '1'], $route_match->getRawParameters()->all());
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Routing/RouteMatchTestBase.php b/core/tests/Drupal/Tests/Core/Routing/RouteMatchTestBase.php
index 6af83970cd6a6400b15a39c8a36c14d54c358e8f..2678fd3268c77c43d3ed22b50508682a3701e054 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RouteMatchTestBase.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RouteMatchTestBase.php
@@ -31,46 +31,46 @@ abstract protected function getRouteMatch($name, Route $route, array $parameters
    * Provide sets of parameters and expected parameters for parameter tests.
    */
   public function routeMatchProvider() {
-    $base_data = array(
-      array(
+    $base_data = [
+      [
         new Route(
           '/test-route/{param_without_leading_underscore}/{_param_with_leading_underscore}',
-          array(
+          [
             'default_without_leading_underscore' => NULL,
             '_default_with_leading_underscore' => NULL,
-          )
+          ]
         ),
-        array(
+        [
           'param_without_leading_underscore' => 'value',
           '_param_with_leading_underscore' => 'value',
           'default_without_leading_underscore' => 'value',
           '_default_with_leading_underscore' => 'value',
           'foo' => 'value',
-        ),
+        ],
         // Parameters should be filtered to only those defined by the route.
         // Specifically:
         // - Path parameters, regardless of name.
         // - Defaults that are not path parameters only if they do not start with
         //   an underscore.
-        array(
+        [
           'param_without_leading_underscore' => 'value',
           '_param_with_leading_underscore' => 'value',
           'default_without_leading_underscore' => 'value',
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
-    $data = array();
+    $data = [];
     foreach ($base_data as $entry) {
       $route = $entry[0];
       $params = $entry[1];
       $expected_params = $entry[2];
-      $data[] = array(
+      $data[] = [
         $this->getRouteMatch('test_route', $route, $params, $params),
         $route,
         $params,
         $expected_params,
-      );
+      ];
     }
 
     return $data;
diff --git a/core/tests/Drupal/Tests/Core/Routing/RoutePreloaderTest.php b/core/tests/Drupal/Tests/Core/Routing/RoutePreloaderTest.php
index 4db4297292cd709cbfc5bb9747b8375e822d18c8..90b4a9ddb66c636f80dfd55b7cd675d9eeb10e6e 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RoutePreloaderTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RoutePreloaderTest.php
@@ -61,15 +61,15 @@ public function testOnAlterRoutesWithAdminRoutes() {
       ->disableOriginalConstructor()
       ->getMock();
     $route_collection = new RouteCollection();
-    $route_collection->add('test', new Route('/admin/foo', array('_controller' => 'Drupal\ExampleController')));
-    $route_collection->add('test2', new Route('/admin/bar', array('_controller' => 'Drupal\ExampleController')));
+    $route_collection->add('test', new Route('/admin/foo', ['_controller' => 'Drupal\ExampleController']));
+    $route_collection->add('test2', new Route('/admin/bar', ['_controller' => 'Drupal\ExampleController']));
     $event->expects($this->once())
       ->method('getRouteCollection')
       ->will($this->returnValue($route_collection));
 
     $this->state->expects($this->once())
       ->method('set')
-      ->with('routing.non_admin_routes', array());
+      ->with('routing.non_admin_routes', []);
     $this->preloader->onAlterRoutes($event);
     $this->preloader->onFinishedRoutes(new Event());
   }
@@ -82,17 +82,17 @@ public function testOnAlterRoutesWithAdminPathNoAdminRoute() {
       ->disableOriginalConstructor()
       ->getMock();
     $route_collection = new RouteCollection();
-    $route_collection->add('test', new Route('/foo/admin/foo', array('_controller' => 'Drupal\ExampleController')));
-    $route_collection->add('test2', new Route('/bar/admin/bar', array('_controller' => 'Drupal\ExampleController')));
-    $route_collection->add('test3', new Route('/administrator/a', array('_controller' => 'Drupal\ExampleController')));
-    $route_collection->add('test4', new Route('/admin', array('_controller' => 'Drupal\ExampleController')));
+    $route_collection->add('test', new Route('/foo/admin/foo', ['_controller' => 'Drupal\ExampleController']));
+    $route_collection->add('test2', new Route('/bar/admin/bar', ['_controller' => 'Drupal\ExampleController']));
+    $route_collection->add('test3', new Route('/administrator/a', ['_controller' => 'Drupal\ExampleController']));
+    $route_collection->add('test4', new Route('/admin', ['_controller' => 'Drupal\ExampleController']));
     $event->expects($this->once())
       ->method('getRouteCollection')
       ->will($this->returnValue($route_collection));
 
     $this->state->expects($this->once())
       ->method('set')
-      ->with('routing.non_admin_routes', array('test', 'test2', 'test3'));
+      ->with('routing.non_admin_routes', ['test', 'test2', 'test3']);
     $this->preloader->onAlterRoutes($event);
     $this->preloader->onFinishedRoutes(new Event());
   }
@@ -106,17 +106,17 @@ public function testOnAlterRoutesWithNonAdminRoutes() {
       ->disableOriginalConstructor()
       ->getMock();
     $route_collection = new RouteCollection();
-    $route_collection->add('test', new Route('/admin/foo', array('_controller' => 'Drupal\ExampleController')));
-    $route_collection->add('test2', new Route('/bar', array('_controller' => 'Drupal\ExampleController')));
+    $route_collection->add('test', new Route('/admin/foo', ['_controller' => 'Drupal\ExampleController']));
+    $route_collection->add('test2', new Route('/bar', ['_controller' => 'Drupal\ExampleController']));
     // Non content routes, like ajax callbacks should be ignored.
-    $route_collection->add('test3', new Route('/bar', array('_controller' => 'Drupal\ExampleController')));
+    $route_collection->add('test3', new Route('/bar', ['_controller' => 'Drupal\ExampleController']));
     $event->expects($this->once())
       ->method('getRouteCollection')
       ->will($this->returnValue($route_collection));
 
     $this->state->expects($this->once())
       ->method('set')
-      ->with('routing.non_admin_routes', array('test2', 'test3'));
+      ->with('routing.non_admin_routes', ['test2', 'test3']);
     $this->preloader->onAlterRoutes($event);
     $this->preloader->onFinishedRoutes(new Event());
   }
@@ -161,7 +161,7 @@ public function testOnRequestOnHtml() {
     $this->state->expects($this->once())
       ->method('get')
       ->with('routing.non_admin_routes')
-      ->will($this->returnValue(array('test2')));
+      ->will($this->returnValue(['test2']));
 
     $this->preloader->onRequest($event);
   }
diff --git a/core/tests/Drupal/Tests/Core/Routing/RoutingFixtures.php b/core/tests/Drupal/Tests/Core/Routing/RoutingFixtures.php
index 8ceac687f9b658f4f9c1a3d3f81270348603a708..38278ab0811040d1aad37cea6bff88037ed3279c 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RoutingFixtures.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RoutingFixtures.php
@@ -47,32 +47,32 @@ public function dropTables(Connection $connection) {
    * Returns a static version of the routes.
    */
   public function staticSampleRouteCollection() {
-    $routes = array();
-    $routes['route_a'] = array(
+    $routes = [];
+    $routes['route_a'] = [
       'path' => '/path/one',
-      'methods' => array('GET'),
-    );
-    $routes['route_b'] = array(
+      'methods' => ['GET'],
+    ];
+    $routes['route_b'] = [
       'path' => '/path/one',
-      'methods' => array('PUT'),
-    );
-    $routes['route_c'] = array(
+      'methods' => ['PUT'],
+    ];
+    $routes['route_c'] = [
       'path' => '/path/two',
-      'methods' => array('GET'),
-      'requirements' => array(
+      'methods' => ['GET'],
+      'requirements' => [
         '_format' => 'json'
-      ),
-    );
-    $routes['route_d'] = array(
+      ],
+    ];
+    $routes['route_d'] = [
       'path' => '/path/three',
-    );
-    $routes['route_e'] = array(
+    ];
+    $routes['route_e'] = [
       'path' => '/path/two',
-      'methods' => array('GET', 'HEAD'),
-      'requirements' => array(
+      'methods' => ['GET', 'HEAD'],
+      'requirements' => [
         '_format' => 'html'
-      ),
-    );
+      ],
+    ];
 
     return $routes;
   }
@@ -235,74 +235,74 @@ public function contentRouteCollection() {
    */
   public function routingTableDefinition() {
 
-    $tables['test_routes'] = array(
+    $tables['test_routes'] = [
       'description' => 'Maps paths to various callbacks (access, page and title)',
-      'fields' => array(
-        'name' => array(
+      'fields' => [
+        'name' => [
           'description' => 'Primary Key: Machine name of this route',
           'type' => 'varchar_ascii',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'path' => array(
+        ],
+        'path' => [
           'description' => 'The path for this URI',
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'pattern_outline' => array(
+        ],
+        'pattern_outline' => [
           'description' => 'The pattern',
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'provider' => array(
+        ],
+        'provider' => [
           'description' => 'The provider grouping to which a route belongs.',
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'access_callback' => array(
+        ],
+        'access_callback' => [
           'description' => 'The callback which determines the access to this router path. Defaults to \Drupal\Core\Session\AccountInterface::hasPermission.',
           'type' => 'varchar',
           'length' => 255,
           'not null' => TRUE,
           'default' => '',
-        ),
-        'access_arguments' => array(
+        ],
+        'access_arguments' => [
           'description' => 'A serialized array of arguments for the access callback.',
           'type' => 'blob',
           'not null' => FALSE,
-        ),
-        'fit' => array(
+        ],
+        'fit' => [
           'description' => 'A numeric representation of how specific the path is.',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
-        ),
-        'number_parts' => array(
+        ],
+        'number_parts' => [
           'description' => 'Number of parts in this router path.',
           'type' => 'int',
           'not null' => TRUE,
           'default' => 0,
           'size' => 'small',
-        ),
-        'route' => array(
+        ],
+        'route' => [
           'description' => 'A serialized Route object',
           'type' => 'text',
-        ),
-      ),
-      'indexes' => array(
-        'fit' => array('fit'),
-        'pattern_outline' => array('pattern_outline'),
-        'provider' => array('provider'),
-      ),
-      'primary key' => array('name'),
-    );
+        ],
+      ],
+      'indexes' => [
+        'fit' => ['fit'],
+        'pattern_outline' => ['pattern_outline'],
+        'provider' => ['provider'],
+      ],
+      'primary key' => ['name'],
+    ];
 
     return $tables;
   }
diff --git a/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php b/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
index b0c1ca33fe99495d35e7b35afeeeb7fab11b2ea3..6c6d768a45632b363f897b4fc716e9a1055fe2ef 100644
--- a/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
@@ -107,8 +107,8 @@ protected function setUp() {
     // We need to set up return value maps for both the getRouteByName() and the
     // getRoutesByNames() method calls on the route provider. The parameters
     // are not passed in and default to an empty array.
-    $route_name_return_map = $routes_names_return_map = array();
-    $return_map_values = array(
+    $route_name_return_map = $routes_names_return_map = [];
+    $return_map_values = [
       [
         'route_name' => 'test_1',
         'return' => $first_route,
@@ -129,10 +129,10 @@ protected function setUp() {
         'route_name' => '<none>',
         'return' => $none_route,
       ],
-    );
+    ];
     foreach ($return_map_values as $values) {
-      $route_name_return_map[] = array($values['route_name'], $values['return']);
-      $routes_names_return_map[] = array(array($values['route_name']), $values['return']);
+      $route_name_return_map[] = [$values['route_name'], $values['return']];
+      $routes_names_return_map[] = [[$values['route_name']], $values['return']];
     }
     $this->provider = $provider;
     $this->provider->expects($this->any())
@@ -149,7 +149,7 @@ protected function setUp() {
 
     $alias_manager->expects($this->any())
       ->method('getAliasByPath')
-      ->will($this->returnCallback(array($this, 'aliasManagerCallback')));
+      ->will($this->returnCallback([$this, 'aliasManagerCallback']));
 
     $this->aliasManager = $alias_manager;
 
@@ -223,7 +223,7 @@ public function testAliasGeneration() {
    * Confirms that generated routes will have aliased paths using interface constants.
    */
   public function testAliasGenerationUsingInterfaceConstants() {
-    $url = $this->generator->generate('test_1', array(), UrlGenerator::ABSOLUTE_PATH);
+    $url = $this->generator->generate('test_1', [], UrlGenerator::ABSOLUTE_PATH);
     $this->assertEquals('/hello/world', $url);
     // No cacheability to test; UrlGenerator::generate() doesn't support
     // collecting cacheability metadata.
@@ -303,7 +303,7 @@ public function testGetPathFromRouteWithSubdirectory() {
    * Confirms that generated routes will have aliased paths.
    */
   public function testAliasGenerationWithParameters() {
-    $url = $this->generator->generate('test_2', array('narf' => '5'));
+    $url = $this->generator->generate('test_2', ['narf' => '5']);
     $this->assertEquals('/goodbye/cruel/world', $url);
     // No cacheability to test; UrlGenerator::generate() doesn't support
     // collecting cacheability metadata.
@@ -312,17 +312,17 @@ public function testAliasGenerationWithParameters() {
       ->method('processOutbound')
       ->with($this->anything());
 
-    $options = array('fragment' => 'top');
+    $options = ['fragment' => 'top'];
     // Extra parameters should appear in the query string.
     $this->assertGenerateFromRoute('test_1', ['zoo' => 5], $options, '/hello/world?zoo=5#top', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT));
 
-    $options = array('query' => array('page' => '1'), 'fragment' => 'bottom');
+    $options = ['query' => ['page' => '1'], 'fragment' => 'bottom'];
     $this->assertGenerateFromRoute('test_2', ['narf' => 5], $options, '/goodbye/cruel/world?page=1#bottom', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT));
 
     // Changing the parameters, the route still matches but there is no alias.
     $this->assertGenerateFromRoute('test_2', ['narf' => 7], $options, '/test/two/7?page=1#bottom', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT));
 
-    $path = $this->generator->getPathFromRoute('test_2', array('narf' => '5'));
+    $path = $this->generator->getPathFromRoute('test_2', ['narf' => '5']);
     $this->assertEquals('test/two/5', $path);
 
     // Specify a query parameter with NULL.
@@ -396,7 +396,7 @@ public function testGetPathFromRouteTrailing() {
    * Confirms that absolute URLs work with generated routes.
    */
   public function testAbsoluteURLGeneration() {
-    $url = $this->generator->generate('test_1', array(), TRUE);
+    $url = $this->generator->generate('test_1', [], TRUE);
     $this->assertEquals('http://localhost/hello/world', $url);
     // No cacheability to test; UrlGenerator::generate() doesn't support
     // collecting cacheability metadata.
@@ -405,7 +405,7 @@ public function testAbsoluteURLGeneration() {
       ->method('processOutbound')
       ->with($this->anything());
 
-    $options = array('absolute' => TRUE, 'fragment' => 'top');
+    $options = ['absolute' => TRUE, 'fragment' => 'top'];
     // Extra parameters should appear in the query string.
     $this->assertGenerateFromRoute('test_1', ['zoo' => 5], $options, 'http://localhost/hello/world?zoo=5#top', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT)->setCacheContexts(['url.site']));
   }
@@ -414,7 +414,7 @@ public function testAbsoluteURLGeneration() {
    * Confirms that absolute URLs work with generated routes using interface constants.
    */
   public function testAbsoluteURLGenerationUsingInterfaceConstants() {
-    $url = $this->generator->generate('test_1', array(), UrlGenerator::ABSOLUTE_URL);
+    $url = $this->generator->generate('test_1', [], UrlGenerator::ABSOLUTE_URL);
     $this->assertEquals('http://localhost/hello/world', $url);
     // No cacheability to test; UrlGenerator::generate() doesn't support
     // collecting cacheability metadata.
@@ -423,7 +423,7 @@ public function testAbsoluteURLGenerationUsingInterfaceConstants() {
       ->method('processOutbound')
       ->with($this->anything());
 
-    $options = array('absolute' => TRUE, 'fragment' => 'top');
+    $options = ['absolute' => TRUE, 'fragment' => 'top'];
     // Extra parameters should appear in the query string.
     $this->assertGenerateFromRoute('test_1', ['zoo' => 5], $options, 'http://localhost/hello/world?zoo=5#top', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT)->setCacheContexts(['url.site']));
   }
@@ -432,20 +432,20 @@ public function testAbsoluteURLGenerationUsingInterfaceConstants() {
    * Confirms that explicitly setting the base_url works with generated routes
    */
   public function testBaseURLGeneration() {
-    $options = array('base_url' => 'http://www.example.com:8888');
+    $options = ['base_url' => 'http://www.example.com:8888'];
     $this->assertGenerateFromRoute('test_1', [], $options, 'http://www.example.com:8888/hello/world', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT));
 
-    $options = array('base_url' => 'http://www.example.com:8888', 'https' => TRUE);
+    $options = ['base_url' => 'http://www.example.com:8888', 'https' => TRUE];
     $this->assertGenerateFromRoute('test_1', [], $options, 'https://www.example.com:8888/hello/world', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT));
 
-    $options = array('base_url' => 'https://www.example.com:8888', 'https' => FALSE);
+    $options = ['base_url' => 'https://www.example.com:8888', 'https' => FALSE];
     $this->assertGenerateFromRoute('test_1', [], $options, 'http://www.example.com:8888/hello/world', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT));
 
     $this->routeProcessorManager->expects($this->exactly(2))
       ->method('processOutbound')
       ->with($this->anything());
 
-    $options = array('base_url' => 'http://www.example.com:8888', 'fragment' => 'top');
+    $options = ['base_url' => 'http://www.example.com:8888', 'fragment' => 'top'];
     // Extra parameters should appear in the query string.
     $this->assertGenerateFromRoute('test_1', ['zoo' => 5], $options, 'http://www.example.com:8888/hello/world?zoo=5#top', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT));
   }
@@ -454,7 +454,7 @@ public function testBaseURLGeneration() {
    * Test that the 'scheme' route requirement is respected during url generation.
    */
   public function testUrlGenerationWithHttpsRequirement() {
-    $url = $this->generator->generate('test_4', array(), TRUE);
+    $url = $this->generator->generate('test_4', [], TRUE);
     $this->assertEquals('https://localhost/test/four', $url);
     // No cacheability to test; UrlGenerator::generate() doesn't support
     // collecting cacheability metadata.
@@ -463,7 +463,7 @@ public function testUrlGenerationWithHttpsRequirement() {
       ->method('processOutbound')
       ->with($this->anything());
 
-    $options = array('absolute' => TRUE, 'https' => TRUE);
+    $options = ['absolute' => TRUE, 'https' => TRUE];
     $this->assertGenerateFromRoute('test_1', [], $options, 'https://localhost/hello/world', (new BubbleableMetadata())->setCacheMaxAge(Cache::PERMANENT)->setCacheContexts(['url.site']));
   }
 
@@ -514,7 +514,7 @@ public function testGenerateWithPathProcessorChangingQueryParameter() {
     $path_processor = $this->getMock(OutboundPathProcessorInterface::CLASS);
     $path_processor->expects($this->atLeastOnce())
       ->method('processOutbound')
-      ->willReturnCallback(function ($path, &$options = array(), Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+      ->willReturnCallback(function ($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
         $options['query'] = ['zoo' => 5];
         return $path;
       });
diff --git a/core/tests/Drupal/Tests/Core/Session/AnonymousUserSessionTest.php b/core/tests/Drupal/Tests/Core/Session/AnonymousUserSessionTest.php
index 0840e0000cec056a01cce208933c49a504e16495..031de8244620c10209071a5fda0ec89815b50eed 100644
--- a/core/tests/Drupal/Tests/Core/Session/AnonymousUserSessionTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/AnonymousUserSessionTest.php
@@ -20,8 +20,8 @@ class AnonymousUserSessionTest extends UnitTestCase {
    */
   public function testUserGetRoles() {
     $anonymous_user = new AnonymousUserSession();
-    $this->assertEquals(array(RoleInterface::ANONYMOUS_ID), $anonymous_user->getRoles());
-    $this->assertEquals(array(), $anonymous_user->getRoles(TRUE));
+    $this->assertEquals([RoleInterface::ANONYMOUS_ID], $anonymous_user->getRoles());
+    $this->assertEquals([], $anonymous_user->getRoles(TRUE));
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Session/PermissionsHashGeneratorTest.php b/core/tests/Drupal/Tests/Core/Session/PermissionsHashGeneratorTest.php
index d5e8c32d82ab5466a8056a4846fdf96c6ef6b324..aa980f8c951f6697fff68c43257da080233d5582 100644
--- a/core/tests/Drupal/Tests/Core/Session/PermissionsHashGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/PermissionsHashGeneratorTest.php
@@ -75,12 +75,12 @@ class PermissionsHashGeneratorTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
 
-    new Settings(array('hash_salt' => 'test'));
+    new Settings(['hash_salt' => 'test']);
 
     // The mocked super user account, with the same roles as Account 2.
     $this->account1 = $this->getMockBuilder('Drupal\user\Entity\User')
       ->disableOriginalConstructor()
-      ->setMethods(array('getRoles', 'id'))
+      ->setMethods(['getRoles', 'id'])
       ->getMock();
     $this->account1->expects($this->any())
       ->method('id')
@@ -89,10 +89,10 @@ protected function setUp() {
       ->method('getRoles');
 
     // Account 2: 'administrator' and 'authenticated' roles.
-    $roles_1 = array('administrator', 'authenticated');
+    $roles_1 = ['administrator', 'authenticated'];
     $this->account2 = $this->getMockBuilder('Drupal\user\Entity\User')
       ->disableOriginalConstructor()
-      ->setMethods(array('getRoles', 'id'))
+      ->setMethods(['getRoles', 'id'])
       ->getMock();
     $this->account2->expects($this->any())
       ->method('getRoles')
@@ -102,10 +102,10 @@ protected function setUp() {
       ->willReturn(2);
 
     // Account 3: 'authenticated' and 'administrator' roles (different order).
-    $roles_3 = array('authenticated', 'administrator');
+    $roles_3 = ['authenticated', 'administrator'];
     $this->account3 = $this->getMockBuilder('Drupal\user\Entity\User')
       ->disableOriginalConstructor()
-      ->setMethods(array('getRoles', 'id'))
+      ->setMethods(['getRoles', 'id'])
       ->getMock();
     $this->account3->expects($this->any())
       ->method('getRoles')
@@ -115,10 +115,10 @@ protected function setUp() {
       ->willReturn(3);
 
     // Updated account 2: now also 'editor' role.
-    $roles_2_updated = array('editor', 'administrator', 'authenticated');
+    $roles_2_updated = ['editor', 'administrator', 'authenticated'];
     $this->account2Updated = $this->getMockBuilder('Drupal\user\Entity\User')
       ->disableOriginalConstructor()
-      ->setMethods(array('getRoles', 'id'))
+      ->setMethods(['getRoles', 'id'])
       ->getMock();
     $this->account2Updated->expects($this->any())
       ->method('getRoles')
@@ -131,7 +131,7 @@ protected function setUp() {
     $random = Crypt::randomBytesBase64(55);
     $this->privateKey = $this->getMockBuilder('Drupal\Core\PrivateKey')
       ->disableOriginalConstructor()
-      ->setMethods(array('get'))
+      ->setMethods(['get'])
       ->getMock();
     $this->privateKey->expects($this->any())
       ->method('get')
@@ -251,9 +251,9 @@ public function testGenerateNoCache() {
 // @todo remove once user_role_permissions() can be injected.
 if (!function_exists('user_role_permissions')) {
   function user_role_permissions(array $roles) {
-    $role_permissions = array();
+    $role_permissions = [];
     foreach ($roles as $rid) {
-      $role_permissions[$rid] = array();
+      $role_permissions[$rid] = [];
     }
     return $role_permissions;
   }
diff --git a/core/tests/Drupal/Tests/Core/Session/UserSessionTest.php b/core/tests/Drupal/Tests/Core/Session/UserSessionTest.php
index 52969e03eb36bf17ccde0ab408637b35b05a0ad0..85fe1bbf36dec068aff075ad6145d7c5f078ad9d 100644
--- a/core/tests/Drupal/Tests/Core/Session/UserSessionTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/UserSessionTest.php
@@ -18,7 +18,7 @@ class UserSessionTest extends UnitTestCase {
    *
    * @var \Drupal\Core\Session\AccountInterface[]
    */
-  protected $users = array();
+  protected $users = [];
 
   /**
    * Provides test data for getHasPermission().
@@ -26,10 +26,10 @@ class UserSessionTest extends UnitTestCase {
    * @return array
    */
   public function providerTestHasPermission() {
-    $data = array();
-    $data[] = array('example permission', array('user_one', 'user_two'), array('user_last'));
-    $data[] = array('another example permission', array('user_two'), array('user_one', 'user_last'));
-    $data[] = array('final example permission', array(), array('user_one', 'user_two', 'user_last'));
+    $data = [];
+    $data[] = ['example permission', ['user_one', 'user_two'], ['user_last']];
+    $data[] = ['another example permission', ['user_two'], ['user_one', 'user_last']];
+    $data[] = ['final example permission', [], ['user_one', 'user_two', 'user_last']];
 
     return $data;
   }
@@ -45,9 +45,9 @@ public function providerTestHasPermission() {
    * @return \Drupal\Core\Session\AccountInterface
    *   The created user session.
    */
-  protected function createUserSession(array $rids = array(), $authenticated = FALSE) {
+  protected function createUserSession(array $rids = [], $authenticated = FALSE) {
     array_unshift($rids, $authenticated ? RoleInterface::AUTHENTICATED_ID : RoleInterface::ANONYMOUS_ID);
-    return new UserSession(array('roles' => $rids));
+    return new UserSession(['roles' => $rids]);
   }
 
   /**
@@ -56,57 +56,57 @@ protected function createUserSession(array $rids = array(), $authenticated = FAL
   protected function setUp() {
     parent::setUp();
 
-    $roles = array();
+    $roles = [];
     $roles['role_one'] = $this->getMockBuilder('Drupal\user\Entity\Role')
       ->disableOriginalConstructor()
-      ->setMethods(array('hasPermission'))
+      ->setMethods(['hasPermission'])
       ->getMock();
     $roles['role_one']->expects($this->any())
       ->method('hasPermission')
-      ->will($this->returnValueMap(array(
-        array('example permission', TRUE),
-        array('another example permission', FALSE),
-        array('last example permission', FALSE),
-      )));
+      ->will($this->returnValueMap([
+        ['example permission', TRUE],
+        ['another example permission', FALSE],
+        ['last example permission', FALSE],
+      ]));
 
     $roles['role_two'] = $this->getMockBuilder('Drupal\user\Entity\Role')
       ->disableOriginalConstructor()
-      ->setMethods(array('hasPermission'))
+      ->setMethods(['hasPermission'])
       ->getMock();
     $roles['role_two']->expects($this->any())
       ->method('hasPermission')
-      ->will($this->returnValueMap(array(
-        array('example permission', TRUE),
-        array('another example permission', TRUE),
-        array('last example permission', FALSE),
-      )));
+      ->will($this->returnValueMap([
+        ['example permission', TRUE],
+        ['another example permission', TRUE],
+        ['last example permission', FALSE],
+      ]));
 
     $roles['anonymous'] = $this->getMockBuilder('Drupal\user\Entity\Role')
       ->disableOriginalConstructor()
-      ->setMethods(array('hasPermission'))
+      ->setMethods(['hasPermission'])
       ->getMock();
     $roles['anonymous']->expects($this->any())
       ->method('hasPermission')
-      ->will($this->returnValueMap(array(
-        array('example permission', FALSE),
-        array('another example permission', FALSE),
-        array('last example permission', FALSE),
-      )));
+      ->will($this->returnValueMap([
+        ['example permission', FALSE],
+        ['another example permission', FALSE],
+        ['last example permission', FALSE],
+      ]));
 
     $role_storage = $this->getMockBuilder('Drupal\user\RoleStorage')
       ->disableOriginalConstructor()
-      ->setMethods(array('loadMultiple'))
+      ->setMethods(['loadMultiple'])
       ->getMock();
     $role_storage->expects($this->any())
       ->method('loadMultiple')
-      ->will($this->returnValueMap(array(
-        array(array(), array()),
-        array(NULL, $roles),
-        array(array('anonymous'), array($roles['anonymous'])),
-        array(array('anonymous', 'role_one'), array($roles['role_one'])),
-        array(array('anonymous', 'role_two'), array($roles['role_two'])),
-        array(array('anonymous', 'role_one', 'role_two'), array($roles['role_one'], $roles['role_two'])),
-      )));
+      ->will($this->returnValueMap([
+        [[], []],
+        [NULL, $roles],
+        [['anonymous'], [$roles['anonymous']]],
+        [['anonymous', 'role_one'], [$roles['role_one']]],
+        [['anonymous', 'role_two'], [$roles['role_two']]],
+        [['anonymous', 'role_one', 'role_two'], [$roles['role_one'], $roles['role_two']]],
+      ]));
 
     $entity_manager = $this->getMock('Drupal\Core\Entity\EntityManagerInterface');
     $entity_manager->expects($this->any())
@@ -117,9 +117,9 @@ protected function setUp() {
     $container->set('entity.manager', $entity_manager);
     \Drupal::setContainer($container);
 
-    $this->users['user_one'] = $this->createUserSession(array('role_one'));
-    $this->users['user_two'] = $this->createUserSession(array('role_one', 'role_two'));
-    $this->users['user_three'] = $this->createUserSession(array('role_two'), TRUE);
+    $this->users['user_one'] = $this->createUserSession(['role_one']);
+    $this->users['user_two'] = $this->createUserSession(['role_one', 'role_two']);
+    $this->users['user_three'] = $this->createUserSession(['role_two'], TRUE);
     $this->users['user_last'] = $this->createUserSession();
   }
 
@@ -153,8 +153,8 @@ public function testHasPermission($permission, array $sessions_with_access, arra
    * @todo Move roles constants to a class/interface
    */
   public function testUserGetRoles() {
-    $this->assertEquals(array(RoleInterface::AUTHENTICATED_ID, 'role_two'), $this->users['user_three']->getRoles());
-    $this->assertEquals(array('role_two'), $this->users['user_three']->getRoles(TRUE));
+    $this->assertEquals([RoleInterface::AUTHENTICATED_ID, 'role_two'], $this->users['user_three']->getRoles());
+    $this->assertEquals(['role_two'], $this->users['user_three']->getRoles(TRUE));
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Site/SettingsTest.php b/core/tests/Drupal/Tests/Core/Site/SettingsTest.php
index 3b6eb65b71b2f3f0c92e6d7eba067883549bd910..bdfb7101a36fa0e8138089d2acbf4edbbf17ce36 100644
--- a/core/tests/Drupal/Tests/Core/Site/SettingsTest.php
+++ b/core/tests/Drupal/Tests/Core/Site/SettingsTest.php
@@ -16,7 +16,7 @@ class SettingsTest extends UnitTestCase {
    *
    * @var array
    */
-  protected $config = array();
+  protected $config = [];
 
   /**
    * The class under test.
@@ -29,11 +29,11 @@ class SettingsTest extends UnitTestCase {
    * @covers ::__construct
    */
   protected function setUp(){
-    $this->config = array(
+    $this->config = [
       'one' => '1',
       'two' => '2',
       'hash_salt' => $this->randomMachineName(),
-    );
+    ];
     $this->settings = new Settings($this->config);
   }
 
@@ -95,11 +95,11 @@ public function testGetHashSaltEmpty(array $config) {
    * @return array
    */
   public function providerTestGetHashSaltEmpty() {
-    return array(
-      array(array()),
-      array(array('hash_salt' => '')),
-      array(array('hash_salt' => NULL)),
-    );
+    return [
+      [[]],
+      [['hash_salt' => '']],
+      [['hash_salt' => NULL]],
+    ];
   }
 
   /**
@@ -119,10 +119,10 @@ public function testSerialize() {
    * @covers ::getApcuPrefix
    */
   public function testGetApcuPrefix() {
-    $settings = new Settings(array('hash_salt' => 123));
+    $settings = new Settings(['hash_salt' => 123]);
     $this->assertNotEquals($settings::getApcuPrefix('cache_test', '/test/a'), $settings::getApcuPrefix('cache_test', '/test/b'));
 
-    $settings = new Settings(array('hash_salt' => 123, 'apcu_ensure_unique_prefix' => FALSE));
+    $settings = new Settings(['hash_salt' => 123, 'apcu_ensure_unique_prefix' => FALSE]);
     $this->assertNotEquals($settings::getApcuPrefix('cache_test', '/test/a'), $settings::getApcuPrefix('cache_test', '/test/b'));
   }
 
@@ -132,7 +132,7 @@ public function testGetApcuPrefix() {
    * @covers ::getInstance
    */
   public function testGetInstanceReflection() {
-    $settings = new Settings(array());
+    $settings = new Settings([]);
 
     $class = new \ReflectionClass(Settings::class);
     $instace_property = $class->getProperty("instance");
diff --git a/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php b/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
index 585c4b975b7ebcb10f21e53146208b50f378f9f4..b7a784d48718ed24cf2b59be74d897ceab1c61bf 100644
--- a/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
+++ b/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
@@ -30,12 +30,12 @@ protected function setUp() {
    * Tests that subscriber does not act when reverse proxy is not set.
    */
   public function testNoProxy() {
-    $settings = new Settings(array());
+    $settings = new Settings([]);
     $this->assertEquals(0, $settings->get('reverse_proxy'));
 
     $middleware = new ReverseProxyMiddleware($this->mockHttpKernel, $settings);
     // Mock a request object.
-    $request = $this->getMock('Symfony\Component\HttpFoundation\Request', array('setTrustedHeaderName', 'setTrustedProxies'));
+    $request = $this->getMock('Symfony\Component\HttpFoundation\Request', ['setTrustedHeaderName', 'setTrustedProxies']);
     // setTrustedHeaderName() should never fire.
     $request->expects($this->never())
       ->method('setTrustedHeaderName');
@@ -50,7 +50,7 @@ public function testNoProxy() {
    */
   public function testReverseProxyEnabled($provided_settings) {
     // Enable reverse proxy and add test values.
-    $settings = new Settings(array('reverse_proxy' => 1) + $provided_settings);
+    $settings = new Settings(['reverse_proxy' => 1] + $provided_settings);
     $this->trustedHeadersAreSet($settings);
   }
 
@@ -58,18 +58,18 @@ public function testReverseProxyEnabled($provided_settings) {
    * Data provider for testReverseProxyEnabled.
    */
   public function reverseProxyEnabledProvider() {
-    return array(
-      array(
-        array(
+    return [
+      [
+        [
           'reverse_proxy_header' => 'X_FORWARDED_FOR_CUSTOMIZED',
           'reverse_proxy_proto_header' => 'X_FORWARDED_PROTO_CUSTOMIZED',
           'reverse_proxy_host_header' => 'X_FORWARDED_HOST_CUSTOMIZED',
           'reverse_proxy_port_header' => 'X_FORWARDED_PORT_CUSTOMIZED',
           'reverse_proxy_forwarded_header' => 'FORWARDED_CUSTOMIZED',
-          'reverse_proxy_addresses' => array('127.0.0.2', '127.0.0.3'),
-        ),
-      ),
-    );
+          'reverse_proxy_addresses' => ['127.0.0.2', '127.0.0.3'],
+        ],
+      ],
+    ];
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/StringTranslation/TranslationManagerTest.php b/core/tests/Drupal/Tests/Core/StringTranslation/TranslationManagerTest.php
index 8ab6874e724d005a7229d34299f54fd447fe808b..2cd750bf10a416a09cac44d777e4f346205db2c9 100644
--- a/core/tests/Drupal/Tests/Core/StringTranslation/TranslationManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/StringTranslation/TranslationManagerTest.php
@@ -36,21 +36,21 @@ protected function setUp() {
    * @return array
    */
   public function providerTestFormatPlural() {
-    return array(
-      [1, 'Singular', '@count plural', array(), array(), 'Singular'],
-      [2, 'Singular', '@count plural', array(), array(), '2 plural'],
+    return [
+      [1, 'Singular', '@count plural', [], [], 'Singular'],
+      [2, 'Singular', '@count plural', [], [], '2 plural'],
       // @todo support locale_get_plural
-      [2, 'Singular', '@count @arg', array('@arg' => '<script>'), array(), '2 &lt;script&gt;'],
-      [2, 'Singular', '@count %arg', array('%arg' => '<script>'), array(), '2 <em class="placeholder">&lt;script&gt;</em>'],
-      [1, 'Singular', '@count plural', array(), array('langcode' => NULL), 'Singular'],
-      [1, 'Singular', '@count plural', array(), array('langcode' => 'es'), 'Singular'],
-    );
+      [2, 'Singular', '@count @arg', ['@arg' => '<script>'], [], '2 &lt;script&gt;'],
+      [2, 'Singular', '@count %arg', ['%arg' => '<script>'], [], '2 <em class="placeholder">&lt;script&gt;</em>'],
+      [1, 'Singular', '@count plural', [], ['langcode' => NULL], 'Singular'],
+      [1, 'Singular', '@count plural', [], ['langcode' => 'es'], 'Singular'],
+    ];
   }
 
   /**
    * @dataProvider providerTestFormatPlural
    */
-  public function testFormatPlural($count, $singular, $plural, array $args = array(), array $options = array(), $expected) {
+  public function testFormatPlural($count, $singular, $plural, array $args = [], array $options = [], $expected) {
     $langcode = empty($options['langcode']) ? 'fr' : $options['langcode'];
     $translator = $this->getMock('\Drupal\Core\StringTranslation\Translator\TranslatorInterface');
     $translator->expects($this->once())
@@ -78,7 +78,7 @@ public function testFormatPlural($count, $singular, $plural, array $args = array
    *
    * @dataProvider providerTestTranslatePlaceholder
    */
-  public function testTranslatePlaceholder($string, array $args = array(), $expected_string) {
+  public function testTranslatePlaceholder($string, array $args = [], $expected_string) {
     $actual = $this->translationManager->translate($string, $args);
     $this->assertInstanceOf(MarkupInterface::class, $actual);
     $this->assertEquals($expected_string, (string) $actual);
diff --git a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
index 09ec9894dcccd170578101c361577b7b1485bf37..b9dc671faa6999f6db77e5b5147c8a6a85af0c10 100644
--- a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
@@ -20,9 +20,9 @@ class AttributeTest extends UnitTestCase {
    * Tests the constructor of the attribute class.
    */
   public function testConstructor() {
-    $attribute = new Attribute(array('class' => array('example-class')));
+    $attribute = new Attribute(['class' => ['example-class']]);
     $this->assertTrue(isset($attribute['class']));
-    $this->assertEquals(new AttributeArray('class', array('example-class')), $attribute['class']);
+    $this->assertEquals(new AttributeArray('class', ['example-class']), $attribute['class']);
 
     // Test adding boolean attributes through the constructor.
     $attribute = new Attribute(['selected' => TRUE, 'checked' => FALSE]);
@@ -30,16 +30,16 @@ public function testConstructor() {
     $this->assertFalse($attribute['checked']->value());
 
     // Test that non-array values with name "class" are cast to array.
-    $attribute = new Attribute(array('class' => 'example-class'));
+    $attribute = new Attribute(['class' => 'example-class']);
     $this->assertTrue(isset($attribute['class']));
-    $this->assertEquals(new AttributeArray('class', array('example-class')), $attribute['class']);
+    $this->assertEquals(new AttributeArray('class', ['example-class']), $attribute['class']);
 
     // Test that safe string objects work correctly.
     $safe_string = $this->prophesize(MarkupInterface::class);
     $safe_string->__toString()->willReturn('example-class');
-    $attribute = new Attribute(array('class' => $safe_string->reveal()));
+    $attribute = new Attribute(['class' => $safe_string->reveal()]);
     $this->assertTrue(isset($attribute['class']));
-    $this->assertEquals(new AttributeArray('class', array('example-class')), $attribute['class']);
+    $this->assertEquals(new AttributeArray('class', ['example-class']), $attribute['class']);
   }
 
   /**
@@ -47,27 +47,27 @@ public function testConstructor() {
    */
   public function testSet() {
     $attribute = new Attribute();
-    $attribute['class'] = array('example-class');
+    $attribute['class'] = ['example-class'];
 
     $this->assertTrue(isset($attribute['class']));
-    $this->assertEquals(new AttributeArray('class', array('example-class')), $attribute['class']);
+    $this->assertEquals(new AttributeArray('class', ['example-class']), $attribute['class']);
   }
 
   /**
    * Tests adding new values to an existing part of the attribute.
    */
   public function testAdd() {
-    $attribute = new Attribute(array('class' => array('example-class')));
+    $attribute = new Attribute(['class' => ['example-class']]);
 
     $attribute['class'][] = 'other-class';
-    $this->assertEquals(new AttributeArray('class', array('example-class', 'other-class')), $attribute['class']);
+    $this->assertEquals(new AttributeArray('class', ['example-class', 'other-class']), $attribute['class']);
   }
 
   /**
    * Tests removing of values.
    */
   public function testRemove() {
-    $attribute = new Attribute(array('class' => array('example-class')));
+    $attribute = new Attribute(['class' => ['example-class']]);
     unset($attribute['class']);
     $this->assertFalse(isset($attribute['class']));
   }
@@ -152,7 +152,7 @@ public function testAddClasses() {
     $this->assertEmpty($attribute['class']);
 
     // Test various permutations of adding values to empty Attribute objects.
-    foreach (array(NULL, FALSE, '', []) as $value) {
+    foreach ([NULL, FALSE, '', []] as $value) {
       // Single value.
       $attribute->addClass($value);
       $this->assertEmpty((string) $attribute);
@@ -172,22 +172,22 @@ public function testAddClasses() {
 
     // Add one class on empty attribute.
     $attribute->addClass('banana');
-    $this->assertArrayEquals(array('banana'), $attribute['class']->value());
+    $this->assertArrayEquals(['banana'], $attribute['class']->value());
 
     // Add one class.
     $attribute->addClass('aa');
-    $this->assertArrayEquals(array('banana', 'aa'), $attribute['class']->value());
+    $this->assertArrayEquals(['banana', 'aa'], $attribute['class']->value());
 
     // Add multiple classes.
     $attribute->addClass('xx', 'yy');
-    $this->assertArrayEquals(array('banana', 'aa', 'xx', 'yy'), $attribute['class']->value());
+    $this->assertArrayEquals(['banana', 'aa', 'xx', 'yy'], $attribute['class']->value());
 
     // Add an array of classes.
-    $attribute->addClass(array('red', 'green', 'blue'));
-    $this->assertArrayEquals(array('banana', 'aa', 'xx', 'yy', 'red', 'green', 'blue'), $attribute['class']->value());
+    $attribute->addClass(['red', 'green', 'blue']);
+    $this->assertArrayEquals(['banana', 'aa', 'xx', 'yy', 'red', 'green', 'blue'], $attribute['class']->value());
 
     // Add an array of duplicate classes.
-    $attribute->addClass(array('red', 'green', 'blue'), array('aa', 'aa', 'banana'), 'yy');
+    $attribute->addClass(['red', 'green', 'blue'], ['aa', 'aa', 'banana'], 'yy');
     $this->assertEquals('banana aa xx yy red green blue', (string) $attribute['class']);
   }
 
@@ -197,8 +197,8 @@ public function testAddClasses() {
    */
   public function testRemoveClasses() {
     // Add duplicate class to ensure that both duplicates are removed.
-    $classes = array('example-class', 'aa', 'xx', 'yy', 'red', 'green', 'blue', 'red');
-    $attribute = new Attribute(array('class' => $classes));
+    $classes = ['example-class', 'aa', 'xx', 'yy', 'red', 'green', 'blue', 'red'];
+    $attribute = new Attribute(['class' => $classes]);
 
     // Remove one class.
     $attribute->removeClass('example-class');
@@ -206,17 +206,17 @@ public function testRemoveClasses() {
 
     // Remove multiple classes.
     $attribute->removeClass('xx', 'yy');
-    $this->assertNotContains(array('xx', 'yy'), $attribute['class']->value());
+    $this->assertNotContains(['xx', 'yy'], $attribute['class']->value());
 
     // Remove an array of classes.
-    $attribute->removeClass(array('red', 'green', 'blue'));
-    $this->assertNotContains(array('red', 'green', 'blue'), $attribute['class']->value());
+    $attribute->removeClass(['red', 'green', 'blue']);
+    $this->assertNotContains(['red', 'green', 'blue'], $attribute['class']->value());
 
     // Remove a class that does not exist.
     $attribute->removeClass('gg');
-    $this->assertNotContains(array('gg'), $attribute['class']->value());
+    $this->assertNotContains(['gg'], $attribute['class']->value());
     // Test that the array index remains sequential.
-    $this->assertArrayEquals(array('aa'), $attribute['class']->value());
+    $this->assertArrayEquals(['aa'], $attribute['class']->value());
 
     $attribute->removeClass('aa');
     $this->assertEmpty((string) $attribute);
@@ -244,14 +244,14 @@ public function testHasClass() {
    */
   public function testChainAddRemoveClasses() {
     $attribute = new Attribute(
-      array('class' => array('example-class', 'red', 'green', 'blue'))
+      ['class' => ['example-class', 'red', 'green', 'blue']]
     );
 
     $attribute
-      ->removeClass(array('red', 'green', 'pink'))
-      ->addClass(array('apple', 'lime', 'grapefruit'))
-      ->addClass(array('banana'));
-    $expected = array('example-class', 'blue', 'apple', 'lime', 'grapefruit', 'banana');
+      ->removeClass(['red', 'green', 'pink'])
+      ->addClass(['apple', 'lime', 'grapefruit'])
+      ->addClass(['banana']);
+    $expected = ['example-class', 'blue', 'apple', 'lime', 'grapefruit', 'banana'];
     $this->assertArrayEquals($expected, $attribute['class']->value(), 'Attributes chained');
   }
 
@@ -262,10 +262,10 @@ public function testChainAddRemoveClasses() {
    * @covers ::removeClass
    * @covers ::addClass
    */
-  public function testTwigAddRemoveClasses($template, $expected, $seed_attributes = array()) {
+  public function testTwigAddRemoveClasses($template, $expected, $seed_attributes = []) {
     $loader = new \Twig_Loader_String();
     $twig = new \Twig_Environment($loader);
-    $data = array('attributes' => new Attribute($seed_attributes));
+    $data = ['attributes' => new Attribute($seed_attributes)];
     $result = $twig->render($template, $data);
     $this->assertEquals($expected, $result);
   }
@@ -278,52 +278,52 @@ public function testTwigAddRemoveClasses($template, $expected, $seed_attributes
    *   a resulting string of classes and an optional array of attributes.
    */
   public function providerTestAttributeClassHelpers() {
-    return array(
-      array("{{ attributes.class }}", ''),
-      array("{{ attributes.addClass('everest').class }}", 'everest'),
-      array("{{ attributes.addClass(['k2', 'kangchenjunga']).class }}", 'k2 kangchenjunga'),
-      array("{{ attributes.addClass('lhotse', 'makalu', 'cho-oyu').class }}", 'lhotse makalu cho-oyu'),
-      array(
+    return [
+      ["{{ attributes.class }}", ''],
+      ["{{ attributes.addClass('everest').class }}", 'everest'],
+      ["{{ attributes.addClass(['k2', 'kangchenjunga']).class }}", 'k2 kangchenjunga'],
+      ["{{ attributes.addClass('lhotse', 'makalu', 'cho-oyu').class }}", 'lhotse makalu cho-oyu'],
+      [
         "{{ attributes.addClass('nanga-parbat').class }}",
         'dhaulagiri manaslu nanga-parbat',
-        array('class' => array('dhaulagiri', 'manaslu')),
-      ),
-      array(
+        ['class' => ['dhaulagiri', 'manaslu']],
+      ],
+      [
         "{{ attributes.removeClass('annapurna').class }}",
         'gasherbrum-i',
-        array('class' => array('annapurna', 'gasherbrum-i')),
-      ),
-      array(
+        ['class' => ['annapurna', 'gasherbrum-i']],
+      ],
+      [
         "{{ attributes.removeClass(['broad peak']).class }}",
         'gasherbrum-ii',
-        array('class' => array('broad peak', 'gasherbrum-ii')),
-      ),
-      array(
+        ['class' => ['broad peak', 'gasherbrum-ii']],
+      ],
+      [
         "{{ attributes.removeClass('gyachung-kang', 'shishapangma').class }}",
         '',
-        array('class' => array('shishapangma', 'gyachung-kang')),
-      ),
-      array(
+        ['class' => ['shishapangma', 'gyachung-kang']],
+      ],
+      [
         "{{ attributes.removeClass('nuptse').addClass('annapurna-ii').class }}",
         'himalchuli annapurna-ii',
-        array('class' => array('himalchuli', 'nuptse')),
-      ),
+        ['class' => ['himalchuli', 'nuptse']],
+      ],
       // Test for the removal of an empty class name.
-      array("{{ attributes.addClass('rakaposhi', '').class }}", 'rakaposhi'),
-    );
+      ["{{ attributes.addClass('rakaposhi', '').class }}", 'rakaposhi'],
+    ];
   }
 
   /**
    * Tests iterating on the values of the attribute.
    */
   public function testIterate() {
-    $attribute = new Attribute(array('class' => array('example-class'), 'id' => 'example-id'));
+    $attribute = new Attribute(['class' => ['example-class'], 'id' => 'example-id']);
 
     $counter = 0;
     foreach ($attribute as $key => $value) {
       if ($counter == 0) {
         $this->assertEquals('class', $key);
-        $this->assertEquals(new AttributeArray('class', array('example-class')), $value);
+        $this->assertEquals(new AttributeArray('class', ['example-class']), $value);
       }
       if ($counter == 1) {
         $this->assertEquals('id', $key);
@@ -337,7 +337,7 @@ public function testIterate() {
    * Tests printing of an attribute.
    */
   public function testPrint() {
-    $attribute = new Attribute(array('class' => array('example-class'), 'id' => 'example-id', 'enabled' => TRUE));
+    $attribute = new Attribute(['class' => ['example-class'], 'id' => 'example-id', 'enabled' => TRUE]);
 
     $content = $this->randomMachineName();
     $html = '<div' . (string) $attribute . '>' . $content . '</div>';
@@ -446,9 +446,9 @@ protected function getXPathResultCount($query, $html) {
    * Tests the storage method.
    */
   public function testStorage() {
-    $attribute = new Attribute(array('class' => array('example-class')));
+    $attribute = new Attribute(['class' => ['example-class']]);
 
-    $this->assertEquals(array('class' => new AttributeArray('class', array('example-class'))), $attribute->storage());
+    $this->assertEquals(['class' => new AttributeArray('class', ['example-class'])], $attribute->storage());
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php b/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
index fe9f6e63cd10602e9f6a930c1f1727d59ce26d83..c4805bc38218ac1f3aba716c72e34bdc15575eab 100644
--- a/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
@@ -75,12 +75,12 @@ public function setUp() {
    * @dataProvider providerTestEscaping
    */
   public function testEscaping($template, $expected) {
-    $twig = new \Twig_Environment(NULL, array(
+    $twig = new \Twig_Environment(NULL, [
       'debug' => TRUE,
       'cache' => FALSE,
       'autoescape' => 'html',
       'optimizations' => 0,
-    ));
+    ]);
     $twig->addExtension($this->systemUnderTest);
 
     $nodes = $twig->parse($twig->tokenize($template));
@@ -98,27 +98,27 @@ public function testEscaping($template, $expected) {
    *   a boolean expecting whether the path will be safe.
    */
   public function providerTestEscaping() {
-    return array(
-      array('{{ path("foo") }}', FALSE),
-      array('{{ path("foo", {}) }}', FALSE),
-      array('{{ path("foo", { foo: "foo" }) }}', FALSE),
-      array('{{ path("foo", foo) }}', TRUE),
-      array('{{ path("foo", { foo: foo }) }}', TRUE),
-      array('{{ path("foo", { foo: ["foo", "bar"] }) }}', TRUE),
-      array('{{ path("foo", { foo: "foo", bar: "bar" }) }}', TRUE),
-      array('{{ path(name = "foo", parameters = {}) }}', FALSE),
-      array('{{ path(name = "foo", parameters = { foo: "foo" }) }}', FALSE),
-      array('{{ path(name = "foo", parameters = foo) }}', TRUE),
-      array(
+    return [
+      ['{{ path("foo") }}', FALSE],
+      ['{{ path("foo", {}) }}', FALSE],
+      ['{{ path("foo", { foo: "foo" }) }}', FALSE],
+      ['{{ path("foo", foo) }}', TRUE],
+      ['{{ path("foo", { foo: foo }) }}', TRUE],
+      ['{{ path("foo", { foo: ["foo", "bar"] }) }}', TRUE],
+      ['{{ path("foo", { foo: "foo", bar: "bar" }) }}', TRUE],
+      ['{{ path(name = "foo", parameters = {}) }}', FALSE],
+      ['{{ path(name = "foo", parameters = { foo: "foo" }) }}', FALSE],
+      ['{{ path(name = "foo", parameters = foo) }}', TRUE],
+      [
         '{{ path(name = "foo", parameters = { foo: ["foo", "bar"] }) }}',
         TRUE
-      ),
-      array('{{ path(name = "foo", parameters = { foo: foo }) }}', TRUE),
-      array(
+      ],
+      ['{{ path(name = "foo", parameters = { foo: foo }) }}', TRUE],
+      [
         '{{ path(name = "foo", parameters = { foo: "foo", bar: "bar" }) }}',
         TRUE
-      ),
-    );
+      ],
+    ];
   }
 
   /**
@@ -185,12 +185,12 @@ public function testActiveThemePath() {
    * @covers ::escapeFilter
    */
   public function testSafeStringEscaping() {
-    $twig = new \Twig_Environment(NULL, array(
+    $twig = new \Twig_Environment(NULL, [
       'debug' => TRUE,
       'cache' => FALSE,
       'autoescape' => 'html',
       'optimizations' => 0,
-    ));
+    ]);
 
     // By default, TwigExtension will attempt to cast objects to strings.
     // Ensure objects that implement MarkupInterface are unchanged.
diff --git a/core/tests/Drupal/Tests/Core/Theme/RegistryTest.php b/core/tests/Drupal/Tests/Core/Theme/RegistryTest.php
index 8be62d88dc673131e994f054c01db895b98d0961..f2cd22ea90bc81314efd077d3b18b7337eee4c9f 100644
--- a/core/tests/Drupal/Tests/Core/Theme/RegistryTest.php
+++ b/core/tests/Drupal/Tests/Core/Theme/RegistryTest.php
@@ -137,7 +137,7 @@ public function testGetRegistryForModule() {
     $this->moduleHandler->expects($this->exactly(2))
       ->method('getImplementations')
       ->with('theme')
-      ->will($this->returnValue(array('theme_test')));
+      ->will($this->returnValue(['theme_test']));
     $this->moduleHandler->expects($this->atLeastOnce())
       ->method('getModuleList')
       ->willReturn([]);
@@ -164,7 +164,7 @@ public function testGetRegistryForModule() {
     $this->assertEquals('module', $info['type']);
     $this->assertEquals('core/modules/system/tests/modules/theme_test', $info['theme path']);
     $this->assertEquals('theme_theme_test_function_suggestions', $info['function']);
-    $this->assertEquals(array(), $info['variables']);
+    $this->assertEquals([], $info['variables']);
 
     // The second call will initialize with the second theme. Ensure that this
     // returns a different object and the discovery for the second theme's
diff --git a/core/tests/Drupal/Tests/Core/Theme/ThemeNegotiatorTest.php b/core/tests/Drupal/Tests/Core/Theme/ThemeNegotiatorTest.php
index 958a5454d5f8de7c0a44246055c13200b84226c6..4b33fcbfcd26b7b6345bd60f8423ebf8e7e51ec4 100644
--- a/core/tests/Drupal/Tests/Core/Theme/ThemeNegotiatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Theme/ThemeNegotiatorTest.php
@@ -61,7 +61,7 @@ public function testDetermineActiveTheme() {
       ->method('checkAccess')
       ->will($this->returnValue(TRUE));
 
-    $route_match = new RouteMatch('test_route', new Route('/test-route'), array(), array());
+    $route_match = new RouteMatch('test_route', new Route('/test-route'), [], []);
     $theme = $this->themeNegotiator->determineActiveTheme($route_match);
 
     $this->assertEquals('example_test', $theme);
@@ -95,7 +95,7 @@ public function testDetermineActiveThemeWithPriority() {
       ->method('checkAccess')
       ->will($this->returnValue(TRUE));
 
-    $route_match = new RouteMatch('test_route', new Route('/test-route'), array(), array());
+    $route_match = new RouteMatch('test_route', new Route('/test-route'), [], []);
     $theme = $this->themeNegotiator->determineActiveTheme($route_match);
 
     $this->assertEquals('example_test', $theme);
@@ -137,7 +137,7 @@ public function testDetermineActiveThemeWithAccessCheck() {
       ->with('example_test2')
       ->will($this->returnValue(TRUE));
 
-    $route_match = new RouteMatch('test_route', new Route('/test-route'), array(), array());
+    $route_match = new RouteMatch('test_route', new Route('/test-route'), [], []);
     $theme = $this->themeNegotiator->determineActiveTheme($route_match);
 
     $this->assertEquals('example_test2', $theme);
@@ -172,7 +172,7 @@ public function testDetermineActiveThemeWithNotApplyingNegotiator() {
       ->method('checkAccess')
       ->will($this->returnValue(TRUE));
 
-    $route_match = new RouteMatch('test_route', new Route('/test-route'), array(), array());
+    $route_match = new RouteMatch('test_route', new Route('/test-route'), [], []);
     $theme = $this->themeNegotiator->determineActiveTheme($route_match);
 
     $this->assertEquals('example_test2', $theme);
diff --git a/core/tests/Drupal/Tests/Core/Transliteration/PhpTransliterationTest.php b/core/tests/Drupal/Tests/Core/Transliteration/PhpTransliterationTest.php
index 0a3388f1e4abe5bc8b86b34fdab228481be68292..ac19ffadf9a824914fe65ea8377d16a7a929ed4d 100644
--- a/core/tests/Drupal/Tests/Core/Transliteration/PhpTransliterationTest.php
+++ b/core/tests/Drupal/Tests/Core/Transliteration/PhpTransliterationTest.php
@@ -74,13 +74,13 @@ public function providerTestPhpTransliterationWithAlter() {
     // Five-byte characters do not work in MySQL, so make a printable version.
     $five_byte_printable = '&#x10330;&#x10338;';
 
-    $cases = array(
+    $cases = [
       // Test the language override hook in the test module, which changes
       // the transliteration of Ä to Z and provides for the 5-byte characters.
-      array('zz', $two_byte, 'Z O U A O aouaohello'),
-      array('zz', $random, $random),
-      array('zz', $five_byte, 'ATh', $five_byte_printable),
-    );
+      ['zz', $two_byte, 'Z O U A O aouaohello'],
+      ['zz', $random, $random],
+      ['zz', $five_byte, 'ATh', $five_byte_printable],
+    ];
 
     return $cases;
   }
diff --git a/core/tests/Drupal/Tests/Core/UrlTest.php b/core/tests/Drupal/Tests/Core/UrlTest.php
index 2c157d5bdfe9e42e9a5ce5bf30990d61acda906a..64212b020c0c461cd8d07486f43fcacacd971f64 100644
--- a/core/tests/Drupal/Tests/Core/UrlTest.php
+++ b/core/tests/Drupal/Tests/Core/UrlTest.php
@@ -73,21 +73,21 @@ class UrlTest extends UnitTestCase {
   protected function setUp() {
     parent::setUp();
 
-    $map = array();
-    $map[] = array('view.frontpage.page_1', array(), array(), FALSE, '/node');
-    $map[] = array('node_view', array('node' => '1'), array(), FALSE, '/node/1');
-    $map[] = array('node_edit', array('node' => '2'), array(), FALSE, '/node/2/edit');
+    $map = [];
+    $map[] = ['view.frontpage.page_1', [], [], FALSE, '/node'];
+    $map[] = ['node_view', ['node' => '1'], [], FALSE, '/node/1'];
+    $map[] = ['node_edit', ['node' => '2'], [], FALSE, '/node/2/edit'];
     $this->map = $map;
 
-    $alias_map = array(
+    $alias_map = [
       // Set up one proper alias that can be resolved to a system path.
-      array('node-alias-test', NULL, FALSE, 'node'),
+      ['node-alias-test', NULL, FALSE, 'node'],
       // Passing in anything else should return the same string.
-      array('node', NULL, FALSE, 'node'),
-      array('node/1', NULL, FALSE, 'node/1'),
-      array('node/2/edit', NULL, FALSE, 'node/2/edit'),
-      array('non-existent', NULL, FALSE, 'non-existent'),
-    );
+      ['node', NULL, FALSE, 'node'],
+      ['node/1', NULL, FALSE, 'node/1'],
+      ['node/2/edit', NULL, FALSE, 'node/2/edit'],
+      ['non-existent', NULL, FALSE, 'non-existent'],
+    ];
 
     // $this->map has $collect_bubbleable_metadata = FALSE; also generate the
     // $collect_bubbleable_metadata = TRUE case for ::generateFromRoute().
@@ -143,7 +143,7 @@ public function testUrlFromRequest() {
         '_raw_variables' => new ParameterBag(['node' => '2']),
       ]);
 
-    $urls = array();
+    $urls = [];
     foreach ($this->map as $index => $values) {
       $path = array_pop($values);
       $url = Url::createFromRequest(Request::create("$path"));
@@ -258,13 +258,13 @@ public function testFromRoutedPathWithValidRoute() {
    * @covers ::createFromRequest
    */
   public function testCreateFromRequest() {
-    $attributes = array(
-      '_raw_variables' => new ParameterBag(array(
+    $attributes = [
+      '_raw_variables' => new ParameterBag([
         'color' => 'chartreuse',
-      )),
+      ]),
       RouteObjectInterface::ROUTE_NAME => 'the_route_name',
-    );
-    $request = new Request(array(), array(), $attributes);
+    ];
+    $request = new Request([], [], $attributes);
 
     $this->router->expects($this->once())
       ->method('matchRequest')
@@ -272,7 +272,7 @@ public function testCreateFromRequest() {
       ->will($this->returnValue($attributes));
 
     $url = Url::createFromRequest($request);
-    $expected = new Url('the_route_name', array('color' => 'chartreuse'));
+    $expected = new Url('the_route_name', ['color' => 'chartreuse']);
     $this->assertEquals($expected, $url);
   }
 
@@ -533,9 +533,9 @@ public function testAccessUnrouted() {
    * @dataProvider accessProvider
    */
   public function testRenderAccess($access) {
-    $element = array(
+    $element = [
       '#url' => Url::fromRoute('entity.node.canonical', ['node' => 3]),
-    );
+    ];
     $this->container->set('current_user', $this->getMock('Drupal\Core\Session\AccountInterface'));
     $this->container->set('access_manager', $this->getMockAccessManager($access));
     $this->assertEquals($access, TestUrl::renderAccess($element));
@@ -853,10 +853,10 @@ protected function getMockAccessManager($access, $account = NULL) {
    * Data provider for the access test methods.
    */
   public function accessProvider() {
-    return array(
-      array(TRUE),
-      array(FALSE),
-    );
+    return [
+      [TRUE],
+      [FALSE],
+    ];
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Utility/ErrorTest.php b/core/tests/Drupal/Tests/Core/Utility/ErrorTest.php
index 6c0960011f7c0f360174a4906b3f1cc33bdde3a5..e89f21d103f06e1c3565b3b5d09b7f28d32f4cbe 100644
--- a/core/tests/Drupal/Tests/Core/Utility/ErrorTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/ErrorTest.php
@@ -32,29 +32,29 @@ public function testGetLastCaller($backtrace, $expected) {
    *   An array of parameter data.
    */
   public function providerTestGetLastCaller() {
-    $data = array();
+    $data = [];
 
     // Test with just one item. This should default to the function being
     // main().
-    $single_item = array($this->createBacktraceItem());
-    $data[] = array($single_item, $this->createBacktraceItem('main()'));
+    $single_item = [$this->createBacktraceItem()];
+    $data[] = [$single_item, $this->createBacktraceItem('main()')];
 
     // Add a second item, without a class.
     $two_items = $single_item;
     $two_items[] = $this->createBacktraceItem('test_function_two');
-    $data[] = array($two_items, $this->createBacktraceItem('test_function_two()'));
+    $data[] = [$two_items, $this->createBacktraceItem('test_function_two()')];
 
     // Add a second item, with a class.
     $two_items = $single_item;
     $two_items[] = $this->createBacktraceItem('test_function_two', 'TestClass');
-    $data[] = array($two_items, $this->createBacktraceItem('TestClass->test_function_two()'));
+    $data[] = [$two_items, $this->createBacktraceItem('TestClass->test_function_two()')];
 
     // Add blacklist functions to backtrace. They should get removed.
-    foreach (array('debug', '_drupal_error_handler', '_drupal_exception_handler') as $function) {
+    foreach (['debug', '_drupal_error_handler', '_drupal_exception_handler'] as $function) {
       $two_items = $single_item;
       // Push to the start of the backtrace.
       array_unshift($two_items, $this->createBacktraceItem($function));
-      $data[] = array($single_item, $this->createBacktraceItem('main()'));
+      $data[] = [$single_item, $this->createBacktraceItem('main()')];
     }
 
     return $data;
@@ -80,31 +80,31 @@ public function testFormatBacktrace($backtrace, $expected) {
    * @return array
    */
   public function providerTestFormatBacktrace() {
-    $data = array();
+    $data = [];
 
     // Test with no function, main should be in the backtrace.
-    $data[] = array(array($this->createBacktraceItem(NULL, NULL)), "main() (Line: 10)\n");
+    $data[] = [[$this->createBacktraceItem(NULL, NULL)], "main() (Line: 10)\n"];
 
-    $base = array($this->createBacktraceItem());
-    $data[] = array($base, "test_function() (Line: 10)\n");
+    $base = [$this->createBacktraceItem()];
+    $data[] = [$base, "test_function() (Line: 10)\n"];
 
     // Add a second item.
     $second_item = $base;
     $second_item[] = $this->createBacktraceItem('test_function_2');
 
-    $data[] = array($second_item, "test_function() (Line: 10)\ntest_function_2() (Line: 10)\n");
+    $data[] = [$second_item, "test_function() (Line: 10)\ntest_function_2() (Line: 10)\n"];
 
     // Add a second item, with a class.
     $second_item_class = $base;
     $second_item_class[] = $this->createBacktraceItem('test_function_2', 'TestClass');
 
-    $data[] = array($second_item_class, "test_function() (Line: 10)\nTestClass->test_function_2() (Line: 10)\n");
+    $data[] = [$second_item_class, "test_function() (Line: 10)\nTestClass->test_function_2() (Line: 10)\n"];
 
     // Add a second item, with a class.
     $second_item_args = $base;
-    $second_item_args[] = $this->createBacktraceItem('test_function_2', NULL, array('string', 10, new \stdClass()));
+    $second_item_args[] = $this->createBacktraceItem('test_function_2', NULL, ['string', 10, new \stdClass()]);
 
-    $data[] = array($second_item_args, "test_function() (Line: 10)\ntest_function_2('string', 10, Object) (Line: 10)\n");
+    $data[] = [$second_item_args, "test_function() (Line: 10)\ntest_function_2('string', 10, Object) (Line: 10)\n"];
 
     return $data;
   }
@@ -124,13 +124,13 @@ public function providerTestFormatBacktrace() {
    * @return array
    *   A backtrace array item.
    */
-  protected function createBacktraceItem($function = 'test_function', $class = NULL, array $args = array(), $line = 10) {
-    $backtrace = array(
+  protected function createBacktraceItem($function = 'test_function', $class = NULL, array $args = [], $line = 10) {
+    $backtrace = [
       'file' => 'test_file',
       'line' => $line,
       'function' => $function,
-      'args' => array(),
-    );
+      'args' => [],
+    ];
 
     if (isset($class)) {
       $backtrace['class'] = $class;
diff --git a/core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php b/core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php
index c3af2db09dda97215b3a00423636c878349e4e6f..50795b31ff66785919125c21b0daa36125b32d75 100644
--- a/core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php
@@ -57,12 +57,12 @@ class LinkGeneratorTest extends UnitTestCase {
   /**
    * Contains the LinkGenerator default options.
    */
-  protected $defaultOptions = array(
-    'query' => array(),
+  protected $defaultOptions = [
+    'query' => [],
     'language' => NULL,
     'set_active_class' => FALSE,
     'absolute' => FALSE,
-  );
+  ];
 
   /**
    * {@inheritdoc}
@@ -88,14 +88,14 @@ protected function setUp() {
    *   Returns some test data.
    */
   public function providerTestGenerateHrefs() {
-    return array(
+    return [
       // Test that the url returned by the URL generator is used.
-      array('test_route_1', array(), FALSE, '/test-route-1'),
+      ['test_route_1', [], FALSE, '/test-route-1'],
         // Test that $parameters is passed to the URL generator.
-      array('test_route_2', array('value' => 'example'), FALSE, '/test-route-2/example'),
+      ['test_route_2', ['value' => 'example'], FALSE, '/test-route-2/example'],
         // Test that the 'absolute' option is passed to the URL generator.
-      array('test_route_3', array(), TRUE, 'http://example.com/test-route-3'),
-    );
+      ['test_route_3', [], TRUE, 'http://example.com/test-route-3'],
+    ];
   }
 
   /**
@@ -109,17 +109,17 @@ public function providerTestGenerateHrefs() {
   public function testGenerateHrefs($route_name, array $parameters, $absolute, $expected_url) {
     $this->urlGenerator->expects($this->once())
       ->method('generateFromRoute')
-      ->with($route_name, $parameters, array('absolute' => $absolute) + $this->defaultOptions)
+      ->with($route_name, $parameters, ['absolute' => $absolute] + $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl($expected_url));
     $this->moduleHandler->expects($this->once())
       ->method('alter');
 
-    $url = new Url($route_name, $parameters, array('absolute' => $absolute));
+    $url = new Url($route_name, $parameters, ['absolute' => $absolute]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array('href' => $expected_url),
-      ), $result);
+    $this->assertLink([
+      'attributes' => ['href' => $expected_url],
+      ], $result);
   }
 
   /**
@@ -130,23 +130,23 @@ public function testGenerateHrefs($route_name, array $parameters, $absolute, $ex
   public function testGenerate() {
     $this->urlGenerator->expects($this->once())
       ->method('generateFromRoute')
-      ->with('test_route_1', array(), array('fragment' => 'the-fragment') + $this->defaultOptions)
+      ->with('test_route_1', [], ['fragment' => 'the-fragment'] + $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/test-route-1#the-fragment'));
 
     $this->moduleHandler->expects($this->once())
       ->method('alter')
       ->with('link', $this->isType('array'));
 
-    $url = new Url('test_route_1', array(), array('fragment' => 'the-fragment'));
+    $url = new Url('test_route_1', [], ['fragment' => 'the-fragment']);
     $url->setUrlGenerator($this->urlGenerator);
 
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'href' => '/test-route-1#the-fragment',
-      ),
+      ],
       'content' => 'Test',
-    ), $result);
+    ], $result);
   }
 
   /**
@@ -180,7 +180,7 @@ public function testGenerateNoLink() {
   public function testGenerateExternal() {
     $this->urlAssembler->expects($this->once())
       ->method('assemble')
-      ->with('https://www.drupal.org', array('set_active_class' => TRUE, 'external' => TRUE) + $this->defaultOptions)
+      ->with('https://www.drupal.org', ['set_active_class' => TRUE, 'external' => TRUE] + $this->defaultOptions)
       ->will($this->returnArgument(0));
 
     $this->moduleHandler->expects($this->once())
@@ -189,7 +189,7 @@ public function testGenerateExternal() {
 
     $this->urlAssembler->expects($this->once())
       ->method('assemble')
-      ->with('https://www.drupal.org', array('set_active_class' => TRUE, 'external' => TRUE) + $this->defaultOptions)
+      ->with('https://www.drupal.org', ['set_active_class' => TRUE, 'external' => TRUE] + $this->defaultOptions)
       ->willReturnArgument(0);
 
     $url = Url::fromUri('https://www.drupal.org');
@@ -198,12 +198,12 @@ public function testGenerateExternal() {
     $url->setOption('set_active_class', TRUE);
 
     $result = $this->linkGenerator->generate('Drupal', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'href' => 'https://www.drupal.org',
-      ),
+      ],
       'content' => 'Drupal',
-    ), $result);
+    ], $result);
   }
 
   /**
@@ -214,7 +214,7 @@ public function testGenerateExternal() {
   public function testGenerateUrlWithQuotes() {
     $this->urlAssembler->expects($this->once())
       ->method('assemble')
-      ->with('base:example', array('query' => array('foo' => '"bar"', 'zoo' => 'baz')) + $this->defaultOptions)
+      ->with('base:example', ['query' => ['foo' => '"bar"', 'zoo' => 'baz']] + $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/example?foo=%22bar%22&zoo=baz'));
 
     $path_validator = $this->getMock('Drupal\Core\Path\PathValidatorInterface');
@@ -229,12 +229,12 @@ public function testGenerateUrlWithQuotes() {
 
     $result = $this->linkGenerator->generate('Drupal', $url);
 
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'href' => '/example?foo=%22bar%22&zoo=baz',
-      ),
+      ],
       'content' => 'Drupal',
-    ), $result, 1);
+    ], $result, 1);
   }
 
   /**
@@ -245,21 +245,21 @@ public function testGenerateUrlWithQuotes() {
   public function testGenerateAttributes() {
     $this->urlGenerator->expects($this->once())
       ->method('generateFromRoute')
-      ->with('test_route_1', array(), $this->defaultOptions)
+      ->with('test_route_1', [], $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/test-route-1'));
 
     // Test that HTML attributes are added to the anchor.
-    $url = new Url('test_route_1', array(), array(
-      'attributes' => array('title' => 'Tooltip'),
-    ));
+    $url = new Url('test_route_1', [], [
+      'attributes' => ['title' => 'Tooltip'],
+    ]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'href' => '/test-route-1',
         'title' => 'Tooltip',
-      ),
-    ), $result);
+      ],
+    ], $result);
   }
 
   /**
@@ -270,19 +270,19 @@ public function testGenerateAttributes() {
   public function testGenerateQuery() {
     $this->urlGenerator->expects($this->once())
       ->method('generateFromRoute')
-      ->with('test_route_1', array(), array('query' => array('test' => 'value')) + $this->defaultOptions)
+      ->with('test_route_1', [], ['query' => ['test' => 'value']] + $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/test-route-1?test=value'));
 
-    $url = new Url('test_route_1', array(), array(
-      'query' => array('test' => 'value'),
-    ));
+    $url = new Url('test_route_1', [], [
+      'query' => ['test' => 'value'],
+    ]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'href' => '/test-route-1?test=value',
-      ),
-    ), $result);
+      ],
+    ], $result);
   }
 
   /**
@@ -293,17 +293,17 @@ public function testGenerateQuery() {
   public function testGenerateParametersAsQuery() {
     $this->urlGenerator->expects($this->once())
       ->method('generateFromRoute')
-      ->with('test_route_1', array('test' => 'value'), $this->defaultOptions)
+      ->with('test_route_1', ['test' => 'value'], $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/test-route-1?test=value'));
 
-    $url = new Url('test_route_1', array('test' => 'value'), array());
+    $url = new Url('test_route_1', ['test' => 'value'], []);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'href' => '/test-route-1?test=value',
-      ),
-    ), $result);
+      ],
+    ], $result);
   }
 
   /**
@@ -314,18 +314,18 @@ public function testGenerateParametersAsQuery() {
   public function testGenerateOptions() {
     $this->urlGenerator->expects($this->once())
       ->method('generateFromRoute')
-      ->with('test_route_1', array(), array('key' => 'value') + $this->defaultOptions)
+      ->with('test_route_1', [], ['key' => 'value'] + $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/test-route-1?test=value'));
-    $url = new Url('test_route_1', array(), array(
+    $url = new Url('test_route_1', [], [
       'key' => 'value',
-    ));
+    ]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'href' => '/test-route-1?test=value',
-      ),
-    ), $result);
+      ],
+    ], $result);
   }
 
   /**
@@ -336,7 +336,7 @@ public function testGenerateOptions() {
   public function testGenerateXss() {
     $this->urlGenerator->expects($this->once())
       ->method('generateFromRoute')
-      ->with('test_route_4', array(), $this->defaultOptions)
+      ->with('test_route_4', [], $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/test-route-4'));
 
     // Test that HTML link text is escaped by default.
@@ -354,38 +354,38 @@ public function testGenerateXss() {
   public function testGenerateWithHtml() {
     $this->urlGenerator->expects($this->at(0))
       ->method('generateFromRoute')
-      ->with('test_route_5', array(), $this->defaultOptions)
+      ->with('test_route_5', [], $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/test-route-5'));
     $this->urlGenerator->expects($this->at(1))
       ->method('generateFromRoute')
-      ->with('test_route_5', array(), $this->defaultOptions)
+      ->with('test_route_5', [], $this->defaultOptions)
       ->willReturn((new GeneratedUrl())->setGeneratedUrl('/test-route-5'));
 
     // Test that HTML tags are stripped from the 'title' attribute.
-    $url = new Url('test_route_5', array(), array(
-      'attributes' => array('title' => '<em>HTML Tooltip</em>'),
-    ));
+    $url = new Url('test_route_5', [], [
+      'attributes' => ['title' => '<em>HTML Tooltip</em>'],
+    ]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'href' => '/test-route-5',
         'title' => 'HTML Tooltip',
-      ),
-    ), $result);
+      ],
+    ], $result);
 
     // Test that safe HTML is output inside the anchor tag unescaped. The
     // Markup::create() call is an intentional unit test for the interaction
     // between MarkupInterface and the LinkGenerator.
-    $url = new Url('test_route_5', array());
+    $url = new Url('test_route_5', []);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate(Markup::create('<em>HTML output</em>'), $url);
-    $this->assertLink(array(
-      'attributes' => array('href' => '/test-route-5'),
-      'child' => array(
+    $this->assertLink([
+      'attributes' => ['href' => '/test-route-5'],
+      'child' => [
         'tag' => 'em',
-      ),
-    ), $result);
+      ],
+    ], $result);
     $this->assertTrue(strpos($result, '<em>HTML output</em>') !== FALSE);
   }
 
@@ -397,7 +397,7 @@ public function testGenerateWithHtml() {
   public function testGenerateActive() {
     $this->urlGenerator->expects($this->exactly(5))
       ->method('generateFromRoute')
-      ->willReturnCallback(function($name, $parameters = array(), $options = array(), $collect_bubbleable_metadata = FALSE) {
+      ->willReturnCallback(function($name, $parameters = [], $options = [], $collect_bubbleable_metadata = FALSE) {
         switch ($name) {
           case 'test_route_1':
             return (new GeneratedUrl())->setGeneratedUrl('/test-route-1');
@@ -412,70 +412,70 @@ public function testGenerateActive() {
 
     $this->urlGenerator->expects($this->exactly(4))
       ->method('getPathFromRoute')
-      ->will($this->returnValueMap(array(
-        array('test_route_1', array(), 'test-route-1'),
-        array('test_route_3', array(), 'test-route-3'),
-        array('test_route_4', array('object' => '1'), 'test-route-4/1'),
-      )));
+      ->will($this->returnValueMap([
+        ['test_route_1', [], 'test-route-1'],
+        ['test_route_3', [], 'test-route-3'],
+        ['test_route_4', ['object' => '1'], 'test-route-4/1'],
+      ]));
 
     $this->moduleHandler->expects($this->exactly(5))
       ->method('alter');
 
     // Render a link.
-    $url = new Url('test_route_1', array(), array('set_active_class' => TRUE));
+    $url = new Url('test_route_1', [], ['set_active_class' => TRUE]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array('data-drupal-link-system-path' => 'test-route-1'),
-    ), $result);
+    $this->assertLink([
+      'attributes' => ['data-drupal-link-system-path' => 'test-route-1'],
+    ], $result);
 
     // Render a link with the set_active_class option disabled.
-    $url = new Url('test_route_1', array(), array('set_active_class' => FALSE));
+    $url = new Url('test_route_1', [], ['set_active_class' => FALSE]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
     $this->assertNoXPathResults('//a[@data-drupal-link-system-path="test-route-1"]', $result);
 
     // Render a link with an associated language.
-    $url = new Url('test_route_1', array(), array(
-      'language' => new Language(array('id' => 'de')),
+    $url = new Url('test_route_1', [], [
+      'language' => new Language(['id' => 'de']),
       'set_active_class' => TRUE,
-    ));
+    ]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'data-drupal-link-system-path' => 'test-route-1',
         'hreflang' => 'de',
-      ),
-    ), $result);
+      ],
+    ], $result);
 
     // Render a link with a query parameter.
-    $url = new Url('test_route_3', array(), array(
-      'query' => array('value' => 'example_1'),
+    $url = new Url('test_route_3', [], [
+      'query' => ['value' => 'example_1'],
       'set_active_class' => TRUE,
-    ));
+    ]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'data-drupal-link-system-path' => 'test-route-3',
         'data-drupal-link-query' => '{"value":"example_1"}',
-      ),
-    ), $result);
+      ],
+    ], $result);
 
     // Render a link with route parameters and a query parameter.
-    $url = new Url('test_route_4', array('object' => '1'), array(
-      'query' => array('value' => 'example_1'),
+    $url = new Url('test_route_4', ['object' => '1'], [
+      'query' => ['value' => 'example_1'],
       'set_active_class' => TRUE,
-    ));
+    ]);
     $url->setUrlGenerator($this->urlGenerator);
     $result = $this->linkGenerator->generate('Test', $url);
-    $this->assertLink(array(
-      'attributes' => array(
+    $this->assertLink([
+      'attributes' => [
         'data-drupal-link-system-path' => 'test-route-4/1',
         'data-drupal-link-query' => '{"value":"example_1"}',
-      ),
-    ), $result);
+      ],
+    ], $result);
   }
 
   /**
@@ -570,13 +570,13 @@ public function testGenerateTwice() {
    */
   public static function assertLink(array $properties, MarkupInterface $html, $count = 1) {
     // Provide default values.
-    $properties += array('attributes' => array());
+    $properties += ['attributes' => []];
 
     // Create an XPath query that selects a link element.
     $query = '//a';
 
     // Append XPath predicates for the attributes and content text.
-    $predicates = array();
+    $predicates = [];
     foreach ($properties['attributes'] as $attribute => $value) {
       $predicates[] = "@$attribute='$value'";
     }
diff --git a/core/tests/Drupal/Tests/Core/Utility/TokenTest.php b/core/tests/Drupal/Tests/Core/Utility/TokenTest.php
index 04a2b8f623d12f71bd1847f46dcb503405e31c65..91620e61559874d240a96cb61d96184d5a006ad2 100644
--- a/core/tests/Drupal/Tests/Core/Utility/TokenTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/TokenTest.php
@@ -104,13 +104,13 @@ protected function setUp() {
    * @covers ::getInfo
    */
   public function testGetInfo() {
-    $token_info = array(
-      'types' => array(
-        'foo' => array(
+    $token_info = [
+      'types' => [
+        'foo' => [
           'name' => $this->randomMachineName(),
-        ),
-      ),
-    );
+        ],
+      ],
+    ];
 
     $this->language->expects($this->atLeastOnce())
       ->method('getId')
diff --git a/core/tests/Drupal/Tests/RandomGeneratorTrait.php b/core/tests/Drupal/Tests/RandomGeneratorTrait.php
index 4fdd89a88db2fe70dfd17088b7afe4ac1f50d038..3cac5d2932ef52d9d6b9241185430a33ee38eeb9 100644
--- a/core/tests/Drupal/Tests/RandomGeneratorTrait.php
+++ b/core/tests/Drupal/Tests/RandomGeneratorTrait.php
@@ -36,7 +36,7 @@ trait RandomGeneratorTrait {
    */
   public function randomString($length = 8) {
     if ($length < 4) {
-      return $this->getRandomGenerator()->string($length, TRUE, array($this, 'randomStringValidate'));
+      return $this->getRandomGenerator()->string($length, TRUE, [$this, 'randomStringValidate']);
     }
 
     // To prevent the introduction of random test failures, ensure that the
@@ -45,7 +45,7 @@ public function randomString($length = 8) {
     $replacement_pos = floor($length / 2);
     // Remove 2 from the length to account for the ampersand and greater than
     // characters.
-    $string = $this->getRandomGenerator()->string($length - 2, TRUE, array($this, 'randomStringValidate'));
+    $string = $this->getRandomGenerator()->string($length - 2, TRUE, [$this, 'randomStringValidate']);
     return substr_replace($string, '>&', $replacement_pos, 0);
   }
 
diff --git a/core/tests/Drupal/Tests/SchemaCheckTestTrait.php b/core/tests/Drupal/Tests/SchemaCheckTestTrait.php
index 7c16df3f2046685236b0a37623a56e07cf9c85a7..0d4dd4bd57be22e800cd2ebbdffaa777c705c5a1 100644
--- a/core/tests/Drupal/Tests/SchemaCheckTestTrait.php
+++ b/core/tests/Drupal/Tests/SchemaCheckTestTrait.php
@@ -28,19 +28,19 @@ public function assertConfigSchema(TypedConfigManagerInterface $typed_config, $c
     if ($errors === FALSE) {
       // @todo Since the use of this trait is under TestBase, it works.
       //   Can be fixed as part of https://www.drupal.org/node/2260053.
-      $this->fail(SafeMarkup::format('No schema for @config_name', array('@config_name' => $config_name)));
+      $this->fail(SafeMarkup::format('No schema for @config_name', ['@config_name' => $config_name]));
       return;
     }
     elseif ($errors === TRUE) {
       // @todo Since the use of this trait is under TestBase, it works.
       //   Can be fixed as part of https://www.drupal.org/node/2260053.
-      $this->pass(SafeMarkup::format('Schema found for @config_name and values comply with schema.', array('@config_name' => $config_name)));
+      $this->pass(SafeMarkup::format('Schema found for @config_name and values comply with schema.', ['@config_name' => $config_name]));
     }
     else {
       foreach ($errors as $key => $error) {
         // @todo Since the use of this trait is under TestBase, it works.
         //   Can be fixed as part of https://www.drupal.org/node/2260053.
-        $this->fail(SafeMarkup::format('Schema key @key failed with: @error', array('@key' => $key, '@error' => $error)));
+        $this->fail(SafeMarkup::format('Schema key @key failed with: @error', ['@key' => $key, '@error' => $error]));
       }
     }
   }
diff --git a/core/tests/Drupal/Tests/UnitTestCase.php b/core/tests/Drupal/Tests/UnitTestCase.php
index 0a3b41a7b53f4dbe533fc53a0112e98a32c7ab3d..f96b5109e83ec38151f47b2bf25e31dfe133a1c1 100644
--- a/core/tests/Drupal/Tests/UnitTestCase.php
+++ b/core/tests/Drupal/Tests/UnitTestCase.php
@@ -104,18 +104,18 @@ protected function assertArrayEquals(array $expected, array $actual, $message =
    * @return \PHPUnit_Framework_MockObject_MockBuilder
    *   A MockBuilder object for the ConfigFactory with the desired return values.
    */
-  public function getConfigFactoryStub(array $configs = array()) {
-    $config_get_map = array();
-    $config_editable_map = array();
+  public function getConfigFactoryStub(array $configs = []) {
+    $config_get_map = [];
+    $config_editable_map = [];
     // Construct the desired configuration object stubs, each with its own
     // desired return map.
     foreach ($configs as $config_name => $config_values) {
-      $map = array();
+      $map = [];
       foreach ($config_values as $key => $value) {
-        $map[] = array($key, $value);
+        $map[] = [$key, $value];
       }
       // Also allow to pass in no argument.
-      $map[] = array('', $config_values);
+      $map[] = ['', $config_values];
 
       $immutable_config_object = $this->getMockBuilder('Drupal\Core\Config\ImmutableConfig')
         ->disableOriginalConstructor()
@@ -123,7 +123,7 @@ public function getConfigFactoryStub(array $configs = array()) {
       $immutable_config_object->expects($this->any())
         ->method('get')
         ->will($this->returnValueMap($map));
-      $config_get_map[] = array($config_name, $immutable_config_object);
+      $config_get_map[] = [$config_name, $immutable_config_object];
 
       $mutable_config_object = $this->getMockBuilder('Drupal\Core\Config\Config')
         ->disableOriginalConstructor()
@@ -131,7 +131,7 @@ public function getConfigFactoryStub(array $configs = array()) {
       $mutable_config_object->expects($this->any())
         ->method('get')
         ->will($this->returnValueMap($map));
-      $config_editable_map[] = array($config_name, $mutable_config_object);
+      $config_editable_map[] = [$config_name, $mutable_config_object];
     }
     // Construct a config factory with the array of configuration object stubs
     // as its return map.
@@ -207,7 +207,7 @@ public function getStringTranslationStub() {
     $translation = $this->getMock('Drupal\Core\StringTranslation\TranslationInterface');
     $translation->expects($this->any())
       ->method('translate')
-      ->willReturnCallback(function ($string, array $args = array(), array $options = array()) use ($translation) {
+      ->willReturnCallback(function ($string, array $args = [], array $options = []) use ($translation) {
         return new TranslatableMarkup($string, $args, $options, $translation);
       });
     $translation->expects($this->any())
diff --git a/core/tests/Drupal/Tests/WebAssert.php b/core/tests/Drupal/Tests/WebAssert.php
index 55ba465ddad7121aa3c4f023a846eb9859fb8e87..ea425178188e957c07381281afabcf02427c8955 100644
--- a/core/tests/Drupal/Tests/WebAssert.php
+++ b/core/tests/Drupal/Tests/WebAssert.php
@@ -113,10 +113,10 @@ public function buttonNotExists($button, TraversableElement $container = NULL) {
    */
   public function selectExists($select, TraversableElement $container = NULL) {
     $container = $container ?: $this->session->getPage();
-    $node = $container->find('named', array(
+    $node = $container->find('named', [
       'select',
       $this->session->getSelectorsHandler()->xpathLiteral($select),
-    ));
+    ]);
 
     if ($node === NULL) {
       throw new ElementNotFoundException($this->session, 'select', 'id|name|label|value', $select);
@@ -143,16 +143,16 @@ public function selectExists($select, TraversableElement $container = NULL) {
    */
   public function optionExists($select, $option, TraversableElement $container = NULL) {
     $container = $container ?: $this->session->getPage();
-    $select_field = $container->find('named', array(
+    $select_field = $container->find('named', [
       'select',
       $this->session->getSelectorsHandler()->xpathLiteral($select),
-    ));
+    ]);
 
     if ($select_field === NULL) {
       throw new ElementNotFoundException($this->session, 'select', 'id|name|label|value', $select);
     }
 
-    $option_field = $select_field->find('named', array('option', $option));
+    $option_field = $select_field->find('named', ['option', $option]);
 
     if ($option_field === NULL) {
       throw new ElementNotFoundException($this->session, 'select', 'id|name|label|value', $option);
@@ -176,16 +176,16 @@ public function optionExists($select, $option, TraversableElement $container = N
    */
   public function optionNotExists($select, $option, TraversableElement $container = NULL) {
     $container = $container ?: $this->session->getPage();
-    $select_field = $container->find('named', array(
+    $select_field = $container->find('named', [
       'select',
       $this->session->getSelectorsHandler()->xpathLiteral($select),
-    ));
+    ]);
 
     if ($select_field === NULL) {
       throw new ElementNotFoundException($this->session, 'select', 'id|name|label|value', $select);
     }
 
-    $option_field = $select_field->find('named', array('option', $option));
+    $option_field = $select_field->find('named', ['option', $option]);
 
     $this->assert($option_field === NULL, sprintf('An option "%s" exists in select "%s", but it should not.', $option, $select));
   }
@@ -316,7 +316,7 @@ public function linkByHrefNotExists($href, $message = '') {
    * @return string
    *   An XPath query with arguments replaced.
    */
-  public function buildXPathQuery($xpath, array $args = array()) {
+  public function buildXPathQuery($xpath, array $args = []) {
     // Replace placeholders.
     foreach ($args as $placeholder => $value) {
       if (is_object($value)) {
diff --git a/core/tests/TestSuites/TestSuiteBase.php b/core/tests/TestSuites/TestSuiteBase.php
index bd047e83c4d8cb0a339f2b48d912bc1e605fc70e..581ea36714e0269e30b8a4a466a24af4cf733988 100644
--- a/core/tests/TestSuites/TestSuiteBase.php
+++ b/core/tests/TestSuites/TestSuiteBase.php
@@ -23,7 +23,7 @@ protected function findExtensionDirectories($root) {
     $extension_roots = \drupal_phpunit_contrib_extension_directory_roots($root);
 
     $extension_directories = array_map('drupal_phpunit_find_extension_directories', $extension_roots);
-    return array_reduce($extension_directories, 'array_merge', array());
+    return array_reduce($extension_directories, 'array_merge', []);
   }
 
   /**
diff --git a/core/tests/bootstrap.php b/core/tests/bootstrap.php
index a2b4921a4525e96178748602266cec78ea5981b7..f78b69ff0498f2c99ae1e1b0d790261e589c8e6f 100644
--- a/core/tests/bootstrap.php
+++ b/core/tests/bootstrap.php
@@ -19,7 +19,7 @@
  *   directory, keyed by extension name.
  */
 function drupal_phpunit_find_extension_directories($scan_directory) {
-  $extensions = array();
+  $extensions = [];
   $dirs = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($scan_directory, \RecursiveDirectoryIterator::FOLLOW_SYMLINKS));
   foreach ($dirs as $dir) {
     if (strpos($dir->getPathname(), '.info.yml') !== FALSE) {
@@ -46,13 +46,13 @@ function drupal_phpunit_contrib_extension_directory_roots($root = NULL) {
   if ($root === NULL) {
     $root = dirname(dirname(__DIR__));
   }
-  $paths = array(
+  $paths = [
     $root . '/core/modules',
     $root . '/core/profiles',
     $root . '/modules',
     $root . '/profiles',
     $root . '/themes',
-  );
+  ];
   $sites_path = $root . '/sites';
   // Note this also checks sites/../modules and sites/../profiles.
   foreach (scandir($sites_path) as $site) {
@@ -78,7 +78,7 @@ function drupal_phpunit_contrib_extension_directory_roots($root = NULL) {
  */
 function drupal_phpunit_get_extension_namespaces($dirs) {
   $suite_names = ['Unit', 'Kernel', 'Functional', 'FunctionalJavascript'];
-  $namespaces = array();
+  $namespaces = [];
   foreach ($dirs as $extension => $dir) {
     if (is_dir($dir . '/src')) {
       // Register the PSR-4 directory for module-provided classes.
@@ -136,7 +136,7 @@ function drupal_phpunit_populate_class_loader() {
     $extension_roots = drupal_phpunit_contrib_extension_directory_roots();
 
     $dirs = array_map('drupal_phpunit_find_extension_directories', $extension_roots);
-    $dirs = array_reduce($dirs, 'array_merge', array());
+    $dirs = array_reduce($dirs, 'array_merge', []);
     $GLOBALS['namespaces'] = drupal_phpunit_get_extension_namespaces($dirs);
   }
   foreach ($GLOBALS['namespaces'] as $prefix => $paths) {
diff --git a/core/themes/bartik/bartik.theme b/core/themes/bartik/bartik.theme
index b1b3308260a86f42d862d5ceca2fbbfc8c6d12f6..1c408cf3cc5cb95bee1deb881c68e0b15698b053 100644
--- a/core/themes/bartik/bartik.theme
+++ b/core/themes/bartik/bartik.theme
@@ -45,14 +45,14 @@ function bartik_preprocess_page_title(&$variables) {
   if (!empty($variables['title_suffix']['add_or_remove_shortcut']) && $variables['title']) {
     // Add a wrapper div using the title_prefix and title_suffix render
     // elements.
-    $variables['title_prefix']['shortcut_wrapper'] = array(
+    $variables['title_prefix']['shortcut_wrapper'] = [
       '#markup' => '<div class="shortcut-wrapper clearfix">',
       '#weight' => 100,
-    );
-    $variables['title_suffix']['shortcut_wrapper'] = array(
+    ];
+    $variables['title_suffix']['shortcut_wrapper'] = [
       '#markup' => '</div>',
       '#weight' => -99,
-    );
+    ];
     // Make sure the shortcut link is the first item in title_suffix.
     $variables['title_suffix']['add_or_remove_shortcut']['#weight'] = -100;
   }
diff --git a/core/themes/bartik/color/color.inc b/core/themes/bartik/color/color.inc
index 4f42620d9c839836689364bf78c8de2316d5040a..55464f2403d655ba5a1f14a3dfecaf5e79102062 100644
--- a/core/themes/bartik/color/color.inc
+++ b/core/themes/bartik/color/color.inc
@@ -5,9 +5,9 @@
  * Lists available colors and color schemes for the Bartik theme.
  */
 
-$info = array(
+$info = [
   // Available colors and color labels used in theme.
-  'fields' => array(
+  'fields' => [
     'top' => t('Header background top'),
     'bottom' => t('Header background bottom'),
     'bg' => t('Main background'),
@@ -17,12 +17,12 @@
     'titleslogan' => t('Title and slogan'),
     'text' => t('Text color'),
     'link' => t('Link color'),
-  ),
+  ],
   // Pre-defined color schemes.
-  'schemes' => array(
-    'default' => array(
+  'schemes' => [
+    'default' => [
       'title' => t('Blue Lagoon (default)'),
-      'colors' => array(
+      'colors' => [
         'top' => '#055a8e',
         'bottom' => '#1d84c3',
         'bg' => '#ffffff',
@@ -32,11 +32,11 @@
         'titleslogan' => '#fffeff',
         'text' => '#3b3b3b',
         'link' => '#0071B3',
-      ),
-    ),
-    'firehouse' => array(
+      ],
+    ],
+    'firehouse' => [
       'title' => t('Firehouse'),
-      'colors' => array(
+      'colors' => [
         'top' => '#cd2d2d',
         'bottom' => '#d64e4e',
         'bg' => '#ffffff',
@@ -46,11 +46,11 @@
         'titleslogan' => '#fffeff',
         'text' => '#888888',
         'link' => '#d6121f',
-      ),
-    ),
-    'ice' => array(
+      ],
+    ],
+    'ice' => [
       'title' => t('Ice'),
-      'colors' => array(
+      'colors' => [
         'top' => '#d0d0d0',
         'bottom' => '#c2c4c5',
         'bg' => '#ffffff',
@@ -60,11 +60,11 @@
         'titleslogan' => '#000000',
         'text' => '#4a4a4a',
         'link' => '#019dbf',
-      ),
-    ),
-    'plum' => array(
+      ],
+    ],
+    'plum' => [
       'title' => t('Plum'),
-      'colors' => array(
+      'colors' => [
         'top' => '#4c1c58',
         'bottom' => '#593662',
         'bg' => '#fffdf7',
@@ -74,11 +74,11 @@
         'titleslogan' => '#ffffff',
         'text' => '#301313',
         'link' => '#9d408d',
-      ),
-    ),
-    'slate' => array(
+      ],
+    ],
+    'slate' => [
       'title' => t('Slate'),
-      'colors' => array(
+      'colors' => [
         'top' => '#4a4a4a',
         'bottom' => '#4e4e4e',
         'bg' => '#ffffff',
@@ -88,31 +88,31 @@
         'titleslogan' => '#ffffff',
         'text' => '#3b3b3b',
         'link' => '#0073b6',
-      ),
-    ),
-  ),
+      ],
+    ],
+  ],
 
   // CSS files (excluding @import) to rewrite with new color scheme.
-  'css' => array(
+  'css' => [
     'css/colors.css',
-  ),
+  ],
 
   // Files to copy.
-  'copy' => array(
+  'copy' => [
     'logo.svg',
-  ),
+  ],
 
   // Gradient definitions.
-  'gradients' => array(
-    array(
+  'gradients' => [
+    [
       // (x, y, width, height).
-      'dimension' => array(0, 0, 0, 0),
+      'dimension' => [0, 0, 0, 0],
       // Direction of gradient ('vertical' or 'horizontal').
       'direction' => 'vertical',
       // Keys of colors to use for the gradient.
-      'colors' => array('top', 'bottom'),
-    ),
-  ),
+      'colors' => ['top', 'bottom'],
+    ],
+  ],
 
   // Preview files.
   'preview_library' => 'bartik/color.preview',
@@ -127,4 +127,4 @@
       ],
     ],
   ],
-);
+];
diff --git a/core/themes/engines/twig/twig.engine b/core/themes/engines/twig/twig.engine
index c8f8f491d25afeb9544b12da4f4288cec5d97646..791f9083b899c42836d8efa931a95d9848007153 100644
--- a/core/themes/engines/twig/twig.engine
+++ b/core/themes/engines/twig/twig.engine
@@ -13,7 +13,7 @@
  * Implements hook_theme().
  */
 function twig_theme($existing, $type, $theme, $path) {
-  $templates = drupal_find_theme_functions($existing, array($theme));
+  $templates = drupal_find_theme_functions($existing, [$theme]);
   $templates += drupal_find_theme_templates($existing, '.html.twig', $path);
   return $templates;
 }
diff --git a/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
index 64ee72440df71f38401b3073b57136bb90221624..91c03e631fe58b71620319d15690bb1746ec2678 100644
--- a/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -31,18 +31,18 @@ function seven_preprocess_html(&$variables) {
  */
 function seven_preprocess_menu_local_tasks(&$variables) {
   if (!empty($variables['primary'])) {
-    $variables['primary']['#attached'] = array(
-      'library' => array(
+    $variables['primary']['#attached'] = [
+      'library' => [
         'seven/drupal.nav-tabs',
-      ),
-    );
+      ],
+    ];
   }
   elseif (!empty($variables['secondary'])) {
-    $variables['secondary']['#attached'] = array(
-      'library' => array(
+    $variables['secondary']['#attached'] = [
+      'library' => [
         'seven/drupal.nav-tabs',
-      ),
-    );
+      ],
+    ];
   }
 }
 
@@ -61,7 +61,7 @@ function seven_preprocess_node_add_list(&$variables) {
     /** @var \Drupal\node\NodeTypeInterface $type */
     foreach ($variables['content'] as $type) {
       $variables['types'][$type->id()]['label'] = $type->label();
-      $variables['types'][$type->id()]['url'] = \Drupal::url('node.add', array('node_type' => $type->id()));
+      $variables['types'][$type->id()]['url'] = \Drupal::url('node.add', ['node_type' => $type->id()]);
     }
   }
 }
@@ -76,8 +76,8 @@ function seven_preprocess_block_content_add_list(&$variables) {
   if (!empty($variables['content'])) {
     foreach ($variables['content'] as $type) {
       $variables['types'][$type->id()]['label'] = $type->label();
-      $options = array('query' => \Drupal::request()->query->all());
-      $variables['types'][$type->id()]['url'] = \Drupal::url('block_content.add_form', array('block_content_type' => $type->id()), $options);
+      $options = ['query' => \Drupal::request()->query->all()];
+      $variables['types'][$type->id()]['url'] = \Drupal::url('block_content.add_form', ['block_content_type' => $type->id()], $options);
     }
   }
 }
@@ -153,36 +153,36 @@ function seven_form_node_form_alter(&$form, FormStateInterface $form_state) {
   /** @var \Drupal\node\NodeInterface $node */
   $node = $form_state->getFormObject()->getEntity();
 
-  $form['#theme'] = array('node_edit_form');
+  $form['#theme'] = ['node_edit_form'];
   $form['#attached']['library'][] = 'seven/node-form';
 
   $form['advanced']['#type'] = 'container';
   $is_new = !$node->isNew() ? format_date($node->getChangedTime(), 'short') : t('Not saved yet');
-  $form['meta'] = array(
-    '#attributes' => array('class' => array('entity-meta__header')),
+  $form['meta'] = [
+    '#attributes' => ['class' => ['entity-meta__header']],
     '#type' => 'container',
     '#group' => 'advanced',
     '#weight' => -100,
-    'published' => array(
+    'published' => [
       '#type' => 'html_tag',
       '#tag' => 'h3',
       '#value' => $node->isPublished() ? t('Published') : t('Not published'),
       '#access' => !$node->isNew(),
-      '#attributes' => array(
+      '#attributes' => [
         'class' => ['entity-meta__title'],
-      ),
-    ),
-    'changed' => array(
+      ],
+    ],
+    'changed' => [
       '#type' => 'item',
-      '#wrapper_attributes' => array('class' => array('entity-meta__last-saved', 'container-inline')),
+      '#wrapper_attributes' => ['class' => ['entity-meta__last-saved', 'container-inline']],
       '#markup' => '<h4 class="label inline">' . t('Last saved') . '</h4> ' . $is_new,
-    ),
-    'author' => array(
+    ],
+    'author' => [
       '#type' => 'item',
-      '#wrapper_attributes' => array('class' => array('author', 'container-inline')),
+      '#wrapper_attributes' => ['class' => ['author', 'container-inline']],
       '#markup' => '<h4 class="label inline">' . t('Author') . '</h4> ' . $node->getOwner()->getUsername(),
-    ),
-  );
+    ],
+  ];
   $form['revision_information']['#type'] = 'container';
   $form['revision_information']['#group'] = 'meta';
 }